+++ /dev/null
-This document details the changes between this version, bash-4.2-rc2,
-and the previous version, bash-4.2-rc1.
-
-1. Changes to Bash
-
-a. Changes to bash_directory_completion_hook so that it's assigned to the
- readline rl_directory_rewrite_hook variable, which modifies the directory
- name passed to opendir without modifying the directory name the user
- typed.
-
-b. Fixed bug in select builtin that caused it to not terminate correctly if
- the read timed out due to $TMOUT.
-
-c. Fixed a problem that resulted in non-repeatable sequences of random
- numbers when RANDOM=0.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.2-rc1,
-and the previous version, bash-4.2-beta.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused some redirection errors to leak file descriptors.
-
-b. Fixed a bug that caused unary `+' and `-' arithmetic operators to have a
- higher precedence than unary `!' and `~'.
-
-c. Fixed a bug that caused simple commands in a pipeline to affect the exit
- status ($?) seen by subsequent pipeline commands.
-
-d. A number of cygwin-specific changes to avoid the use of text-mode files
- and file access, and to make sure that \r is handled correctly.
-
-e. Fixed a bug that caused the read builtin to not return failure if an
- attempt is made to assign to a readonly variable.
-
-f. Fixed a bug that caused some builtin usage messages to not be translated.
-
-g. Fixed a bug that caused the getopts builtin to not return failure if an
- attempt is made to assign to a readonly variable. Now it returns 2.
-
-h. Fixed the cd and pwd builtins to return failure if PWD is readonly and
- cannot be assigned to.
-
-i. Added code to check the return value of access(2) on Solaris systems,
- since it returns success for executable tests (e.g., `test -x') when
- run by root, even if the file permissions don't allow execution.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused directory names in words to be completed to not
- be dequoted correctly.
-
-3. New Features in Bash
-
-4. New Features in Readline
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.2-beta,
-and the previous version, bash-4.2-alpha.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused the \W prompt string escape to not add a closing
- NULL.
-
-b. Fixed a bug that caused partially-quoted words that were not subject to
- word splitting to retained quoted NULLs.
-
-c. Added considerable efficiency speedups when pattern matching in multibyte
- locales by skipping multibyte character functions where possible.
-
-d. Added considerable speedups to variable expansion when in multibyte locales.
-
-e. Fixed a bug that caused the expansion of $* when there are no positional
- parameters to cause the shell to dump core when used in a pattern
- matching context.
-
-f. Fixed a bug that caused variable expansions preceding regular builtins to
- not change the shell environment during their execution.
-
-2. Changes to Readline
-
-a. Fixed a bug that made an explicit argument of 0 to yank-last-arg behave
- as if it were a negative argument.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.2-alpha,
-and the previous version, bash-4.1-release.
-
-1. Changes to Bash
-
-a. Fixed a bug in the parser when processing alias expansions containing
- quoted newlines.
-
-b. Fixed a memory leak in associative array expansion.
-
-c. Fixed a bug that caused quoted here-strings to be requoted when printed.
-
-d. Fixed a bug in arithmetic expansion that caused the index in an array
- expansion to be evaluated twice under certain circumstances.
-
-e. Fixed several bugs with the expansion and display of variables that have
- been given attributes but not values and are technically unset.
-
-f. Fixed a bug that caused core dumps when using filename completion that
- expands to a filename containing a globbing character.
-
-g. Fixed a bug that caused assignment statements preceding a special builtin
- when running in Posix mode to not persist after the builtin completed
- when the special builtin was executed in a shell function without any
- local variables.
-
-h. Fixed a bug that caused a command to remain in the hash table even after
- `hash command' did not find anything if there was already an existing
- hashed pathname.
-
-i. Fixed several bugs caused by executing unsafe functions from a signal
- handler in the cases where a signal handler is executed immediately
- rather than setting a flag for later execution.
-
-j. Fixed a bug that caused some internal flag variables to be set
- incorrectly if `read -t' timed out.
-
-k. Fixed a Posix compatibility issue by making sure that a backslash escaping
- a `}' within a double-quoted ${...} parameter expansion is removed as part
- of the parameter expansion.
-
-l. Fixed a bug that caused execution of a trap to overwrite PIPESTATUS.
-
-m. Fixed a bug that caused here documents to not be displayed correctly
- when attached to commands inside compound commands.
-
-n. Fixed a bug that caused the printf builtin to use the wrong precision
- when using the `*' modifier.
-
-o. Fixed a bug that caused an arriving SIGCHLD to interrupt output functions
- like those invoked by echo or printf.
-
-p. Changed to use a more robust mechanism than eaccess(2) when test is
- checking filenames for execution permission.
-
-q. Fixed a bug that caused spurious semicolons to be added into the command
- history in certain cases.
-
-r. Fixed a bug that caused the shell to free non-allocated memory when
- unsetting element 0 of an associative array after it was assigned
- implicitly.
-
-s. Fixed a bug that could cause the shell to dump core if using the `v'
- vi editing command on a multi-line command.
-
-t. Fixed a bug that left FIFOs opened by process substitutions open long
- enough to potentially cause file descriptor exhaustion when running a
- shell function or shell builtin.
-
-u. Fixed a bug that caused the history expansion functions to not recognize
- process substitution or extended glob patterns as single words.
-
-v. Fixed a bug that caused restricted shells to set a restricted command's
- exit status incorrectly.
-
-w. Fixed a bug that caused bash to ignore the wrong set of filenames when
- completing a command using the `complete-filename' readline command.
-
-x. Fixed a bug that caused a -PID argument following a -s sig or -n sig to
- not be interpreted as a signal specification.
-
-y. Changed posix-mode behavior of a parse error in a `.' script or `eval'
- command to exit the shell under Posix-specified conditions. Previous
- versions printed a warning.
-
-z. Fixed a bug in \W prompt expansion that resulted in incorrect expansion
- in the event of overlapping strings.
-
-aa. Fixed a bug that caused the := parameter expansion operator to return the
- wrong value as the result of the expansion.
-
-bb. When in Posix mode, a single quote is not treated specially in a
- double-quoted ${...} expansion, unless the expansion operator is
- # or % or the non-Posix `//', `^', and `,'. In particular, it does
- not define a new quoting context. This is from Posix interpretation 221.
-
-cc. Fixed a bug that inadvertently allowed program names containing slashes
- to be entered into the command hash table.
-
-dd. Fixed a bug that caused the select builtin to incorrectly compute the
- display width of the arguments in the presence of multibyte characters.
-
-ee. Fixed a bug that caused bash to not change the xtrace file descriptor if
- BASH_XTRACEFD was found in the shell environment at startup.
-
-ff. Fixed a memory leak in the pattern removal parameter expansion.
-
-gg. Fixed a bug that caused SIGINT to fail to interrupt a nested loop if the
- loop was in a pipeline.
-
-hh. Fixed a problem in $(...) parsing that caused the parser to add an extra
- space to a here-document delimiter if the first word contained a `/'.
-
-ii. Fixed a bug that caused functions defined with the `function' reserved
- word to require braces around the function body.
-
-jj. Fixed a bug that caused bash to dump core when a variable expansion being
- used as an array subscript failed.
-
-kk. Fixed a bug that caused bash to dump core if the case-modification
- expansions were used on a variable with a null value.
-
-ll. Fixed a bug that caused partially-quoted strings to be split incorrectly
- if a variable with a null value was expanded within double quotes.
-
-mm. The pattern substitution word expansion has been sped up dramatically
- when running in a locale with multibyte characters.
-
-nn. Fixed a bug that caused history -a to not write the correct lines to
- the history file if all the new lines in the history list were added
- since the last time the history file was read or written.
-
-oo. Fixed a bug that caused completion of a word with an unclosed `` command
- substitution to set the prompt incorrectly.
-
-pp. Fixed a bug that caused extended globbing patterns in $HISTIGNORE or
- $GLOBIGNORE to be incorrectly scanned.
-
-qq. Fixed a bug caused by closing file descriptors 3-20 on shell startup. The
- shell now sets them to close-on-exec.
-
-rr. Fixed a bug that caused the exit status of `exec file' to be set incorrectly
- if `file' was a directory.
-
-ss. Fixed a bug in the `.' builtin to make a non-interactive posix-mode shell
- exit if the file argument to `.' is not found. Prefixing exec with
- `command' makes the shell not exit. Posix requires this behavior.
-
-tt. Fixed a bug that caused `sh -c 'command exec; exit 1' to hang.
-
-uu. Fixed a bug in $(...) command substitution parsing that caused the shell
- to treat backslash-newline incorrectly when parsing a comment.
-
-vv. Fixed bug that caused brace expansion sequence generation to misbehave
- when supplied integers greater than 2**31 - 1.
-
-ww. Fixed a bug that caused failure to save file descriptors for redirections
- to corrupt shell file descriptors.
-
-xx. Fixed a bug that caused bash-forward-shellword to not correctly handle
- quoted strings.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused the unconverted filename to be added to the list of
- completions when the application specified filename conversion functions.
-
-b. Fixed a bug that caused the wrong filename to be passed to opendir when the
- application has specified a filename dequoting function.
-
-c. Fixed a bug when repeating a character search in vi mode in the case where
- there was no search to repeat.
-
-d. When show-all-if-ambiguous is set, the completion routines no longer insert
- a common match prefix that is shorter than the text being completed.
-
-e. The full set of vi editing commands may now be used in callback mode.
-
-f. Fixed a bug that caused readline to not update its idea of the terminal
- dimensions while running in `no-echo' mode.
-
-h. Fixed a bug that caused readline to dump core if an application called
- rl_prep_terminal without setting rl_instream.
-
-i. Fixed a bug that caused meta-prefixed characters bound to incremental
- search forward or backward to not be recognized if they were typed
- subsequently.
-
-j. The incremental search code treats key sequences that map to the same
- functions as (default) ^G, ^W, and ^Y as equivalent to those characters.
-
-k. Fixed a bug in menu-complete that caused it to misbehave with large
- negative argument.
-
-l. Fixed a bug that caused vi-mode yank-last-arg to ring the bell when invoked
- at the end of the line.
-
-3. New Features in Bash
-
-a. `exec -a foo' now sets $0 to `foo' in an executable shell script without a
- leading #!.
-
-b. Subshells begun to execute command substitutions or run shell functions or
- builtins in subshells do not reset trap strings until a new trap is
- specified. This allows $(trap) to display the caller's traps and the
- trap strings to persist until a new trap is set.
-
-c. `trap -p' will now show signals ignored at shell startup, though their
- disposition still cannot be modified.
-
-d. $'...', echo, and printf understand \uXXXX and \UXXXXXXXX escape sequences.
-
-e. declare/typeset has a new `-g' option, which creates variables in the
- global scope even when run in a shell function.
-
-f. test/[/[[ have a new -v variable unary operator, which returns success if
- `variable' has been set.
-
-g. Posix parsing changes to allow `! time command' and multiple consecutive
- instances of `!' (which toggle) and `time' (which have no cumulative
- effect).
-
-h. Posix change to allow `time' as a command by itself to print the elapsed
- user, system, and real times for the shell and its children.
-
-j. $((...)) is always parsed as an arithmetic expansion first, instead of as
- a potential nested command substitution, as Posix requires.
-
-k. A new FUNCNEST variable to allow the user to control the maximum shell
- function nesting (recursive execution) level.
-
-l. The mapfile builtin now supplies a third argument to the callback command:
- the line about to be assigned to the supplied array index.
-
-m. The printf builtin has a new %(fmt)T specifier, which allows time values
- to use strftime-like formatting.
-
-n. There is a new `compat41' shell option.
-
-o. The cd builtin has a new Posix-mandated `-e' option.
-
-p. Negative subscripts to indexed arrays, previously errors, now are treated
- as offsets from the maximum assigned index + 1.
-
-q. Negative length specifications in the ${var:offset:length} expansion,
- previously errors, are now treated as offsets from the end of the variable.
-
-r. Parsing change to allow `time -p --'.
-
-s. Posix-mode parsing change to not recognize `time' as a keyword if the
- following token begins with a `-'. This means no more Posix-mode
- `time -p'. Posix interpretation 267.
-
-t. There is a new `lastpipe' shell option that runs the last command of a
- pipeline in the current shell context. The lastpipe option has no
- effect if job control is enabled.
-
-u. History expansion no longer expands the `$!' variable expansion.
-
-v. Posix mode shells no longer exit if a variable assignment error occurs
- with an assignment preceding a command that is not a special builtin.
-
-w. Non-interactive mode shells exit if -u is enabled and an attempt is made
- to use an unset variable with the % or # expansions, the `//', `^', or
- `,' expansions, or the parameter length expansion.
-
-x. Posix-mode shells use the argument passed to `.' as-is if a $PATH search
- fails, effectively searching the current directory. Posix-2008 change.
-
-4. New Features in Readline
-
-a. The history library does not try to write the history filename in the
- current directory if $HOME is unset. This closes a potential security
- problem if the application does not specify a history filename.
-
-b. New bindable variable `completion-display-width' to set the number of
- columns used when displaying completions.
-
-c. New bindable variable `completion-case-map' to cause case-insensitive
- completion to treat `-' and `_' as identical.
-
-d. There are new bindable vi-mode command names to avoid readline's case-
- insensitive matching not allowing them to be bound separately.
-
-e. New bindable variable `menu-complete-display-prefix' causes the menu
- completion code to display the common prefix of the possible completions
- before cycling through the list, instead of after.
+++ /dev/null
-This document details the changes between this version, bash-4.2-rc2,
-and the previous version, bash-4.2-rc1.
-
-1. Changes to Bash
-
-a. Changes to bash_directory_completion_hook so that it's assigned to the
- readline rl_directory_rewrite_hook variable, which modifies the directory
- name passed to opendir without modifying the directory name the user
- typed.
-
-b. Fixed bug in select builtin that caused it to not terminate correctly if
- the read timed out due to $TMOUT.
-
-c. Fixed a problem that resulted in non-repeatable sequences of random
- numbers when RANDOM=0.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.2-rc1,
-and the previous version, bash-4.2-beta.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused some redirection errors to leak file descriptors.
-
-b. Fixed a bug that caused unary `+' and `-' arithmetic operators to have a
- higher precedence than unary `!' and `~'.
-
-c. Fixed a bug that caused simple commands in a pipeline to affect the exit
- status ($?) seen by subsequent pipeline commands.
-
-d. A number of cygwin-specific changes to avoid the use of text-mode files
- and file access, and to make sure that \r is handled correctly.
-
-e. Fixed a bug that caused the read builtin to not return failure if an
- attempt is made to assign to a readonly variable.
-
-f. Fixed a bug that caused some builtin usage messages to not be translated.
-
-g. Fixed a bug that caused the getopts builtin to not return failure if an
- attempt is made to assign to a readonly variable. Now it returns 2.
-
-h. Fixed the cd and pwd builtins to return failure if PWD is readonly and
- cannot be assigned to.
-
-i. Added code to check the return value of access(2) on Solaris systems,
- since it returns success for executable tests (e.g., `test -x') when
- run by root, even if the file permissions don't allow execution.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused directory names in words to be completed to not
- be dequoted correctly.
-
-3. New Features in Bash
-
-4. New Features in Readline
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.2-beta,
-and the previous version, bash-4.2-alpha.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused the \W prompt string escape to not add a closing
- NULL.
-
-b. Fixed a bug that caused partially-quoted words that were not subject to
- word splitting to retained quoted NULLs.
-
-c. Added considerable efficiency speedups when pattern matching in multibyte
- locales by skipping multibyte character functions where possible.
-
-d. Added considerable speedups to variable expansion when in multibyte locales.
-
-e. Fixed a bug that caused the expansion of $* when there are no positional
- parameters to cause the shell to dump core when used in a pattern
- matching context.
-
-f. Fixed a bug that caused variable expansions preceding regular builtins to
- not change the shell environment during their execution.
-
-2. Changes to Readline
-
-a. Fixed a bug that made an explicit argument of 0 to yank-last-arg behave
- as if it were a negative argument.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.2-alpha,
-and the previous version, bash-4.1-release.
-
-1. Changes to Bash
-
-a. Fixed a bug in the parser when processing alias expansions containing
- quoted newlines.
-
-b. Fixed a memory leak in associative array expansion.
-
-c. Fixed a bug that caused quoted here-strings to be requoted when printed.
-
-d. Fixed a bug in arithmetic expansion that caused the index in an array
- expansion to be evaluated twice under certain circumstances.
-
-e. Fixed several bugs with the expansion and display of variables that have
- been given attributes but not values and are technically unset.
-
-f. Fixed a bug that caused core dumps when using filename completion that
- expands to a filename containing a globbing character.
-
-g. Fixed a bug that caused assignment statements preceding a special builtin
- when running in Posix mode to not persist after the builtin completed
- when the special builtin was executed in a shell function without any
- local variables.
-
-h. Fixed a bug that caused a command to remain in the hash table even after
- `hash command' did not find anything if there was already an existing
- hashed pathname.
-
-i. Fixed several bugs caused by executing unsafe functions from a signal
- handler in the cases where a signal handler is executed immediately
- rather than setting a flag for later execution.
-
-j. Fixed a bug that caused some internal flag variables to be set
- incorrectly if `read -t' timed out.
-
-k. Fixed a Posix compatibility issue by making sure that a backslash escaping
- a `}' within a double-quoted ${...} parameter expansion is removed as part
- of the parameter expansion.
-
-l. Fixed a bug that caused execution of a trap to overwrite PIPESTATUS.
-
-m. Fixed a bug that caused here documents to not be displayed correctly
- when attached to commands inside compound commands.
-
-n. Fixed a bug that caused the printf builtin to use the wrong precision
- when using the `*' modifier.
-
-o. Fixed a bug that caused an arriving SIGCHLD to interrupt output functions
- like those invoked by echo or printf.
-
-p. Changed to use a more robust mechanism than eaccess(2) when test is
- checking filenames for execution permission.
-
-q. Fixed a bug that caused spurious semicolons to be added into the command
- history in certain cases.
-
-r. Fixed a bug that caused the shell to free non-allocated memory when
- unsetting element 0 of an associative array after it was assigned
- implicitly.
-
-s. Fixed a bug that could cause the shell to dump core if using the `v'
- vi editing command on a multi-line command.
-
-t. Fixed a bug that left FIFOs opened by process substitutions open long
- enough to potentially cause file descriptor exhaustion when running a
- shell function or shell builtin.
-
-u. Fixed a bug that caused the history expansion functions to not recognize
- process substitution or extended glob patterns as single words.
-
-v. Fixed a bug that caused restricted shells to set a restricted command's
- exit status incorrectly.
-
-w. Fixed a bug that caused bash to ignore the wrong set of filenames when
- completing a command using the `complete-filename' readline command.
-
-x. Fixed a bug that caused a -PID argument following a -s sig or -n sig to
- not be interpreted as a signal specification.
-
-y. Changed posix-mode behavior of a parse error in a `.' script or `eval'
- command to exit the shell under Posix-specified conditions. Previous
- versions printed a warning.
-
-z. Fixed a bug in \W prompt expansion that resulted in incorrect expansion
- in the event of overlapping strings.
-
-aa. Fixed a bug that caused the := parameter expansion operator to return the
- wrong value as the result of the expansion.
-
-bb. When in Posix mode, a single quote is not treated specially in a
- double-quoted ${...} expansion, unless the expansion operator is
- # or % or the non-Posix `//', `^', and `,'. In particular, it does
- not define a new quoting context. This is from Posix interpretation 221.
-
-cc. Fixed a bug that inadvertently allowed program names containing slashes
- to be entered into the command hash table.
-
-dd. Fixed a bug that caused the select builtin to incorrectly compute the
- display width of the arguments in the presence of multibyte characters.
-
-ee. Fixed a bug that caused bash to not change the xtrace file descriptor if
- BASH_XTRACEFD was found in the shell environment at startup.
-
-ff. Fixed a memory leak in the pattern removal parameter expansion.
-
-gg. Fixed a bug that caused SIGINT to fail to interrupt a nested loop if the
- loop was in a pipeline.
-
-hh. Fixed a problem in $(...) parsing that caused the parser to add an extra
- space to a here-document delimiter if the first word contained a `/'.
-
-ii. Fixed a bug that caused functions defined with the `function' reserved
- word to require braces around the function body.
-
-jj. Fixed a bug that caused bash to dump core when a variable expansion being
- used as an array subscript failed.
-
-kk. Fixed a bug that caused bash to dump core if the case-modification
- expansions were used on a variable with a null value.
-
-ll. Fixed a bug that caused partially-quoted strings to be split incorrectly
- if a variable with a null value was expanded within double quotes.
-
-mm. The pattern substitution word expansion has been sped up dramatically
- when running in a locale with multibyte characters.
-
-nn. Fixed a bug that caused history -a to not write the correct lines to
- the history file if all the new lines in the history list were added
- since the last time the history file was read or written.
-
-oo. Fixed a bug that caused completion of a word with an unclosed `` command
- substitution to set the prompt incorrectly.
-
-pp. Fixed a bug that caused extended globbing patterns in $HISTIGNORE or
- $GLOBIGNORE to be incorrectly scanned.
-
-qq. Fixed a bug caused by closing file descriptors 3-20 on shell startup. The
- shell now sets them to close-on-exec.
-
-rr. Fixed a bug that caused the exit status of `exec file' to be set incorrectly
- if `file' was a directory.
-
-ss. Fixed a bug in the `.' builtin to make a non-interactive posix-mode shell
- exit if the file argument to `.' is not found. Prefixing exec with
- `command' makes the shell not exit. Posix requires this behavior.
-
-tt. Fixed a bug that caused `sh -c 'command exec; exit 1' to hang.
-
-uu. Fixed a bug in $(...) command substitution parsing that caused the shell
- to treat backslash-newline incorrectly when parsing a comment.
-
-vv. Fixed bug that caused brace expansion sequence generation to misbehave
- when supplied integers greater than 2**31 - 1.
-
-ww. Fixed a bug that caused failure to save file descriptors for redirections
- to corrupt shell file descriptors.
-
-xx. Fixed a bug that caused bash-forward-shellword to not correctly handle
- quoted strings.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused the unconverted filename to be added to the list of
- completions when the application specified filename conversion functions.
-
-b. Fixed a bug that caused the wrong filename to be passed to opendir when the
- application has specified a filename dequoting function.
-
-c. Fixed a bug when repeating a character search in vi mode in the case where
- there was no search to repeat.
-
-d. When show-all-if-ambiguous is set, the completion routines no longer insert
- a common match prefix that is shorter than the text being completed.
-
-e. The full set of vi editing commands may now be used in callback mode.
-
-f. Fixed a bug that caused readline to not update its idea of the terminal
- dimensions while running in `no-echo' mode.
-
-h. Fixed a bug that caused readline to dump core if an application called
- rl_prep_terminal without setting rl_instream.
-
-i. Fixed a bug that caused meta-prefixed characters bound to incremental
- search forward or backward to not be recognized if they were typed
- subsequently.
-
-j. The incremental search code treats key sequences that map to the same
- functions as (default) ^G, ^W, and ^Y as equivalent to those characters.
-
-k. Fixed a bug in menu-complete that caused it to misbehave with large
- negative argument.
-
-l. Fixed a bug that caused vi-mode yank-last-arg to ring the bell when invoked
- at the end of the line.
-
-3. New Features in Bash
-
-a. `exec -a foo' now sets $0 to `foo' in an executable shell script without a
- leading #!.
-
-b. Subshells begun to execute command substitutions or run shell functions or
- builtins in subshells do not reset trap strings until a new trap is
- specified. This allows $(trap) to display the caller's traps and the
- trap strings to persist until a new trap is set.
-
-c. `trap -p' will now show signals ignored at shell startup, though their
- disposition still cannot be modified.
-
-d. $'...', echo, and printf understand \uXXXX and \UXXXXXXXX escape sequences.
-
-e. declare/typeset has a new `-g' option, which creates variables in the
- global scope even when run in a shell function.
-
-f. test/[/[[ have a new -v variable unary operator, which returns success if
- `variable' has been set.
-
-g. Posix parsing changes to allow `! time command' and multiple consecutive
- instances of `!' (which toggle) and `time' (which have no cumulative
- effect).
-
-h. Posix change to allow `time' as a command by itself to print the elapsed
- user, system, and real times for the shell and its children.
-
-j. $((...)) is always parsed as an arithmetic expansion first, instead of as
- a potential nested command substitution, as Posix requires.
-
-k. A new FUNCNEST variable to allow the user to control the maximum shell
- function nesting (recursive execution) level.
-
-l. The mapfile builtin now supplies a third argument to the callback command:
- the line about to be assigned to the supplied array index.
-
-m. The printf builtin has a new %(fmt)T specifier, which allows time values
- to use strftime-like formatting.
-
-n. There is a new `compat41' shell option.
-
-o. The cd builtin has a new Posix-mandated `-e' option.
-
-p. Negative subscripts to indexed arrays, previously errors, now are treated
- as offsets from the maximum assigned index + 1.
-
-q. Negative length specifications in the ${var:offset:length} expansion,
- previously errors, are now treated as offsets from the end of the variable.
-
-r. Parsing change to allow `time -p --'.
-
-s. Posix-mode parsing change to not recognize `time' as a keyword if the
- following token begins with a `-'. This means no more Posix-mode
- `time -p'. Posix interpretation 267.
-
-t. There is a new `lastpipe' shell option that runs the last command of a
- pipeline in the current shell context. The lastpipe option has no
- effect if job control is enabled.
-
-u. History expansion no longer expands the `$!' variable expansion.
-
-v. Posix mode shells no longer exit if a variable assignment error occurs
- with an assignment preceding a command that is not a special builtin.
-
-w. Non-interactive mode shells exit if -u is enabled and an attempt is made
- to use an unset variable with the % or # expansions, the `//', `^', or
- `,' expansions, or the parameter length expansion.
-
-x. Posix-mode shells use the argument passed to `.' as-is if a $PATH search
- fails, effectively searching the current directory. Posix-2008 change.
-
-4. New Features in Readline
-
-a. The history library does not try to write the history filename in the
- current directory if $HOME is unset. This closes a potential security
- problem if the application does not specify a history filename.
-
-b. New bindable variable `completion-display-width' to set the number of
- columns used when displaying completions.
-
-c. New bindable variable `completion-case-map' to cause case-insensitive
- completion to treat `-' and `_' as identical.
-
-d. There are new bindable vi-mode command names to avoid readline's case-
- insensitive matching not allowing them to be bound separately.
-
-e. New bindable variable `menu-complete-display-prefix' causes the menu
- completion code to display the common prefix of the possible completions
- before cycling through the list, instead of after.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.1-rc,
-and the previous version, bash-4.1-beta.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused printf to not return a partial value when it
- encountered an error while converting an integer argument.
-
-b. Fixed a bug that caused setting one of the compatNN options to not
- turn off the others.
-
-c. The (undocumented) --wordexp option is no longer included by default.
-
-d. Fixed a bug in conditional command execution that caused it to not
- correctly ignore the exit status under certain circumstances.
-
-e. Added a configure-time check for correctly-working asprintf/snprintf.
-
-f. Fixed some problems with line number calculation and display when sourcing
- a file in an interactive shell.
-
-g. Fixed a bug that caused the shell to crash when using `declare -A foo=bar'.
-
-h. Fixed a bug that caused an off-by-one error when calculating the directories
- to display with the PROMPT_DIRTRIM option.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused applications using the callback interface to not
- react to SIGINT (or other signals) until another character arrived.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.1-beta,
-and the previous version, bash-4.1-alpha.
-
-1. Changes to Bash
-
-a. Fixed a bug in mapfile that caused the shell to crash if it was passed the
- name of an associative array.
-
-b. Fixed a bug that caused the shell to incorrectly split case patterns if
- they contained characters in $IFS.
-
-c. Fixed a bug that caused the shell to set $? to the wrong value when using
- a construct ending with a variable assignment with set -x enabled and PS4
- containing a command substitution.
-
-d. Fixed a bug that caused the shell to read commands incorrectly if an
- expansion error occurred under certain conditions in a user-specified
- subshell.
-
-e. Fixed a bug that caused the shell to set $? incorrectly if a parse error
- occurred in an evaluation context ("eval", trap command, dot script, etc.)
-
-f. Fixed a bug that caused the shell to attempt command substitution
- completion within a single-quoted string.
-
-g. Fixed a bug that caused the shell to insert an extra single quote during
- word completion.
-
-h. Fixed a bug that caused the shell to crash if invoked with the environment
- variable EMACS having a null value.
-
-i. Fixed a bug that caused bash to incorrectly report the presence of new
- mail in a `maildir' environment.
-
-j. Fixed a bug that caused the shell to not recognize a here-document ending
- delimiter inside a command substitution.
-
-k. Fixed a bug that caused the shell to crash when a a dynamic array variable
- was assigned a scalar value.
-
-2. Changes to Readline
-
-3. New Features in Bash
-
-a. The mapfile/readarray builtin no longer stores the commands it invokes via
- callbacks in the history list.
-
-b. There is a new `compat40' shopt option.
-
-c. The < and > operators to [[ do string comparisons using the current locale
- only if the compatibility level is greater than 40 (set to 41 by default).
-
-4. New Features in Readline
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.1-alpha,
-and the previous version, bash-4.0-release.
-
-1. Changes to Bash
-
-a. Fixed bugs in the parser involving new parsing of the commands contained
- in command substitution when the substitution is read.
-
-b. Fixed a bug that caused the shell to dump core when performing programmable
- completion using a shell function.
-
-c. Fixed a bug in `mapfile' that caused it to invoke callbacks at the wrong
- time.
-
-d. Fixed a bug that caused the shell to dump core when listing jobs in the
- `exit' builtin.
-
-e. Fixed several bugs encountered when reading subscripts in associative
- array assignments and expansions.
-
-f. Fixed a bug that under some circumstances caused an associative array to
- be converted to an indexed array.
-
-g. Fixed a bug that caused syntax errors and SIGINT interrupts to not set
- $? to a value > 128.
-
-h. Fixed a bug that caused the shell to remove FIFOs associated with process
- substitution inside shell functions.
-
-i. Fixed a bug that caused terminal attributes to not be reset when the
- `read' builtin timed out.
-
-j. Fixed a bug in brace expansion that caused unwanted zero padding of the
- expanded terms.
-
-k. Fixed a bug that prevented the |& construct from working as intended when
- used with a simple command with additional redirections.
-
-l. Fixed a bug with the case statment ;& terminator that caused the shell to
- dereference a NULL pointer.
-
-m. Fixed a bug that caused assignment statements or redirections preceding
- a simple command name to inhibit alias expansion.
-
-n. Fixed the behavior of `set -u' to conform to the latest Posix interpretation:
- every expansion of an unset variable except $@ and $* will cause the
- shell to exit.
-
-o. Fixed a bug that caused double-quoted expansions of $* inside word
- expansions like ${x#$*} to not expand properly when $IFS is empty.
-
-p. Fixed a bug that caused traps to set $LINENO to the wrong value when they
- execute.
-
-q. Fixed a bug that caused off-by-one errors when computing history lines in
- the `fc' builtin.
-
-r. Fixed a bug that caused some terminating signals to not exit the shell
- quickly enough, forcing the kernel to send the signal (e.g., SIGSEGV)
- multiple times.
-
-s. Fixed a bug that caused the shell to attempt to add empty lines to the
- history list when reading here documents.
-
-t. Made some internal changes that dramatically speeds up sequential indexed
- array access.
-
-u. Fixed a bug that caused the shell to write past the end of a string when
- completing a double-quoted string ending in a backslash.
-
-v. Fixed a bug that caused the shell to replace too many characters when a
- pattern match was null in a ${foo//bar} expansion.
-
-w. Fixed bugs in the expansion of ** that caused duplicate directory names
- and the contents of the current directory to be omitted.
-
-x. Fixed a bug that caused $? to not be set correctly when referencing an
- unset variable with set -u and set -e enabled.
-
-y. Fixed a bug caused by executing an external program from the DEBUG trap
- while a pipeline was running. The effect was to disturb the pipeline
- state, occasionally causing it to hang.
-
-z. Fixed a bug that caused the ** glob expansion to dump core if it
- encountered an unsearchable directory.
-
-aa. Fixed a bug that caused `command -v' and `command -V' to not honor the
- path set by the -p option.
-
-bb. Fixed a bug that caused brace expansion to take place too soon in some
- compound array assignments.
-
-cc. Fixed a bug that caused programmable completion functions' changes to
- READLINE_POINT to not be reflected back to readline.
-
-dd. Fixed a bug that caused the shell to dump core if a trap was executed
- during a shell assignment statement.
-
-ee. Fixed an off-by-one error when computing the number of positional
- parameters for the ${@:0:n} expansion.
-
-ff. Fixed a problem with setting COMP_CWORD for programmable completion
- functions that could leave it set to -1.
-
-gg. Fixed a bug that caused the ERR trap to be triggered in some cases where
- `set -e' would not have caused the shell to exit.
-
-hh. Fixed a bug that caused changes made by `compopt' to not persist past the
- completion function in which compopt was executed.
-
-ii. Fixed a bug that caused the list of hostname completions to not be cleared
- when HOSTNAME was unset.
-
-jj. Fixed a bug that caused variable expansion in here documents to look in
- any temporary environment.
-
-kk. Bash and readline can now convert file names between precomposed and
- decomposed Unicode on Mac OS X ("keyboard" and file system forms,
- respectively). This affects filename completion (using new
- rl_filename_rewrite_hook), globbing, and readline redisplay.
-
-ll. The ERR and EXIT traps now see a non-zero value for $? when a parser
- error after set -e has been enabled causes the shell to exit.
-
-mm. Fixed a bug that in brace expansion that caused zero-prefixed terms to
- not contain the correct number of digits.
-
-nn. Fixed a bug that caused the shell to free non-allocated memory when
- unsetting an associative array which had had a value implicitly assigned
- to index "0".
-
-oo. Fixed a memory leak in the ${!prefix@} expansion.
-
-pp. Fixed a bug that caused printf to not correctly report all write errors.
-
-qq. Fixed a bug that caused single and double quotes to act as delimiters
- when splitting a command line into words for programmable completion.
-
-rr. Fixed a bug that caused ** globbing that caused **/path/* to match every
- directory, not just those matching `path'.
-
-ss. Fixed a bug that caused the shell to dump core when running `help' without
- arguments if the terminal width was fewer than 7 characters.
-
-2. Changes to Readline
-
-a. The SIGWINCH signal handler now avoids calling the redisplay code if
- one arrives while in the middle of redisplay.
-
-b. Changes to the timeout code to make sure that timeout values greater
- than one second are handled better.
-
-c. Fixed a bug in the redisplay code that was triggered by a prompt
- containing invisible characters exactly the width of the screen.
-
-d. Fixed a bug in the redisplay code encountered when running in horizontal
- scroll mode.
-
-e. Fixed a bug that prevented menu completion from properly completing
- filenames.
-
-f. Fixed a redisplay bug caused by a multibyte character causing a line to
- wrap.
-
-g. Fixed a bug that caused key sequences of two characters to not be
- recognized when a longer sequence identical in the first two characters
- was bound.
-
-h. Fixed a bug that caused history expansion to be attempted on $'...'
- single-quoted strings.
-
-i. Fixed a bug that caused incorrect redisplay when the prompt contained
- multibyte characters in an `invisible' sequence bracketed by \[ and
- \].
-
-j. Fixed a bug that caused history expansion to short-circuit after
- encountering a multibyte character.
-
-3. New Features in Bash
-
-a. Here-documents within $(...) command substitutions may once more be
- delimited by the closing right paren, instead of requiring a newline.
-
-b. Bash's file status checks (executable, readable, etc.) now take file
- system ACLs into account on file systems that support them.
-
-c. Bash now passes environment variables with names that are not valid
- shell variable names through into the environment passed to child
- processes.
-
-d. The `execute-unix-command' readline function now attempts to clear and
- reuse the current line rather than move to a new one after the command
- executes.
-
-e. `printf -v' can now assign values to array indices.
-
-f. New `complete -E' and `compopt -E' options that work on the "empty"
- completion: completion attempted on an empty command line.
-
-g. New complete/compgen/compopt -D option to define a `default' completion:
- a completion to be invoked on command for which no completion has been
- defined. If this function returns 124, programmable completion is
- attempted again, allowing a user to dynamically build a set of completions
- as completion is attempted by having the default completion function
- install individual completion functions each time it is invoked.
-
-h. When displaying associative arrays, subscripts are now quoted.
-
-i. Changes to dabbrev-expand to make it more `emacs-like': no space appended
- after matches, completions are not sorted, and most recent history entries
- are presented first.
-
-j. The [[ and (( commands are now subject to the setting of `set -e' and the
- ERR trap.
-
-k. The source/. builtin now removes NUL bytes from the file before attempting
- to parse commands.
-
-l. There is a new configuration option (in config-top.h) that forces bash to
- forward all history entries to syslog.
-
-m. A new variable $BASHOPTS to export shell options settable using `shopt' to
- child processes.
-
-n. There is a new confgure option that forces the extglob option to be
- enabled by default.
-
-o. New variable $BASH_XTRACEFD; when set to an integer bash will write xtrace
- output to that file descriptor.
-
-p. If the optional left-hand-side of a redirection is of the form {var}, the
- shell assigns the file descriptor used to $var or uses $var as the file
- descriptor to move or close, depending on the redirection operator.
-
-q. The < and > operators to the [[ conditional command now do string
- comparison according to the current locale.
-
-r. Programmable completion now uses the completion for `b' instead of `a'
- when completion is attempted on a line like: a $(b c.
-
-s. Force extglob on temporarily when parsing the pattern argument to
- the == and != operators to the [[ command, for compatibility.
-
-t. Changed the behavior of interrupting the wait builtin when a SIGCHLD is
- received and a trap on SIGCHLD is set to be Posix-mode only.
-
-u. The read builtin has a new `-N nchars' option, which reads exactly NCHARS
- characters, ignoring delimiters like newline.
-
-4. New Features in Readline
-
-a. New bindable function: menu-complete-backward.
-
-b. In the vi insertion keymap, C-n is now bound to menu-complete by default,
- and C-p to menu-complete-backward.
-
-c. When in vi command mode, repeatedly hitting ESC now does nothing, even
- when ESC introduces a bound key sequence. This is closer to how
- historical vi behaves.
-
-d. New bindable function: skip-csi-sequence. Can be used as a default to
- consume key sequences generated by keys like Home and End without having
- to bind all keys.
-
-e. New application-settable function: rl_filename_rewrite_hook. Can be used
- to rewite or modify filenames read from the file system before they are
- compared to the word to be completed.
-
-f. New bindable variable: skip-completed-text, active when completing in the
- middle of a word. If enabled, it means that characters in the completion
- that match characters in the remainder of the word are "skipped" rather
- than inserted into the line.
-
-g. The pre-readline-6.0 version of menu completion is available as
- "old-menu-complete" for users who do not like the readline-6.0 version.
-
-h. New bindable variable: echo-control-characters. If enabled, and the
- tty ECHOCTL bit is set, controls the echoing of characters corresponding
- to keyboard-generated signals.
-
-i. New bindable variable: enable-meta-key. Controls whether or not readline
- sends the smm/rmm sequences if the terminal indicates it has a meta key
- that enables eight-bit characters.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.0-release,
-and the previous version, bash-4.0-rc1.
-
-1. Changes to Bash
-
-a. Changed the message printed when setlocale(3) fails to only include the
- strerror error text if the call changes errno.
-
-b. Changed trap command execution to reset the line number before running a
- trap (except DEBUG and RETURN traps).
-
-c. Fixed behavior of case-modifiying word expansions to not work on
- individual words within a variable's value.
-
-d. Fixed a bug that caused mapfile to not be interruptible when run in an
- interactive shell.
-
-e. Fixed a bug that caused mapfile to not run callbacks for the first line
- read.
-
-f. Fixed a bug that caused mapfile to not honor EOF typed in an interactive
- shell.
-
-g. Fixed the coprocess reaping code to not run straight from a signal handler.
-
-h. Fixed a bug that caused printf -b to ignore the first % conversion specifier
- in the format string on 64-bit systems.
-
-i. Fixed a bug that caused incorrect word splitting when `:', `=', or `~'
- appeared in $IFS.
-
-j. Fixed a bug that caused data corruption in the programmable completion code
- when a shell function called from a completion aborted execution.
-
-k. Fixed a bug that caused the CPU usage reported by the `time' builtin to be
- capped at 100%.
-
-l. Changed behavior of shell when -e option is in effect to reflect consensus
- of Posix shell standardization working group.
-
-m. Fixed a bug introduced in bash-4.0-alpha that caused redirections to not
- be displayed by `type' or `declare' when appearing in functions under
- certain circumstances.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused !(...) extended glob patterns to inhibit later
- history expansion.
-
-b. Reworked the signal handling to avoid calling disallowed functions from a
- signal handler.
-
-3. New Features in Bash
-
-a. `readarray' is now a synonym for `mapfile'.
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.0-rc1,
-and the previous version, bash-4.0-beta2.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused parsing errors when a $()-style command
- substitution was follwed immediately by a quoted newline.
-
-b. Fixed a bug that caused extended shell globbing patterns beginning with
- `*(' to not work when used with pattern substitution word expansions.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.0-beta2,
-and the previous version, bash-4.0-beta.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused failed word expansions to set $? but not
- PIPESTATUS.
-
-b. Changed filename completion to quote the tilde in a filename with a
- leading tilde that exists in the current directory.
-
-c. Fixed a bug that caused a file descriptor leak when performing
- redirections attached to a compound command.
-
-d. Fixed a bug that caused expansions of $@ and $* to not exit the shell if
- the -u option was enabled and there were no posititional parameters.
-
-e. Fixed a bug that resulted in bash not terminating immediately if a
- terminating signal was received while performing output.
-
-f. Fixed a bug that caused the shell to crash after creating 256 process
- substitutions during word completion.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused redisplay errors when using prompts with invisible
- characters and numeric arguments to a command in a multibyte locale.
-
-b. Fixed a bug that caused redisplay errors when using prompts with invisible
- characters spanning more than two physical screen lines.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.0-beta,
-and the previous version, bash-4.0-alpha.
-
-1. Changes to Bash
-
-a. Fixed a typo that caused a variable to be used before initialization
- while parsing Posix-style command substitutions.
-
-b. Fixed a bug that caused stray ^? when the expansion of a parameter used
- as part of a pattern removal expansion is empty, but part of a non-
- empty string.
-
-c. Fixed a bug that could cause strings not converted to numbers by strtol
- to be treated as if the conversion had been successful.
-
-d. The `return' builtin now accepts no options and requires a `--' before
- a negative return value, as Posix requires.
-
-e. Fixed a bug that caused local variables to be created with the empty
- string for a value rather than no value.
-
-f. Changed behavior so the shell now acts as if it received an interrupt
- when a pipeline is killed by SIGINT while executing a list.
-
-g. Fixed a bug that caused `declare var' and `typeset var' to initialize
- `var' to the empty string.
-
-h. Changed `bind' builtin to print a warning but proceed if invoked when
- line editing is not active.
-
-i. Fixed a bug that caused the shell to exit when the `errexit' option is
- set and a command in a pipeline returns a non-zero exit status.
-
-j. Fixed a bug that caused the shell to not run the exit trap in a command
- run with `bash -c' under some circumstances.
-
-k. Fixed a bug that caused parser errors to occasionally not set $? when
- running commands with `eval'.
-
-l. Fixed a bug that caused stray control characters when evaluating compound
- array assignments containing $'\x7f' escapes.
-
-m. Fixed a bug that caused redirections involving file descriptor 10 as the
- target to behave incorrectly.
-
-n. Fixed a bug that could cause memory to be freed multiple times when
- assigning to COMP_WORDBREAKS.
-
-o. Fixed a bug that could cause NULL pointer dereferences when COMP_WORDBREAKS
- was unset.
-
-2. Changes to Readline
-
-3. New Features in Bash
-
-a. A value of 0 for the -t option to `read' now returns success if there is
- input available to be read from the specified file descriptor.
-
-b. CDPATH and GLOBIGNORE are ignored when the shell is running in privileged
- mode.
-
-c. New bindable readline functions shell-forward-word and shell-backward-word,
- which move forward and backward words delimited by shell metacharacters
- and honor shell quoting.
-
-d. New bindable readline functions shell-backward-kill-word and shell-kill-word
- which kill words backward and forward, but use the same word boundaries
- as shell-forward-word and shell-backward-word.
-
-4. New Features in Readline
-
-a. If the kernel supports it, readline displays special characters
- corresponding to a keyboard-generated signal when the signal is received.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.0-alpha,
-and the previous version, bash-3.2-release.
-
-1. Changes to Bash
-
-a. Fixed several bugs in old-style `` command substitution parsing, including
- comment parsing and quoted string handling.
-
-b. Fixed problems parsing arguments to the [[ command's =~ regular expression
- matching operator: metacharacter and whitespace parsing.
-
-c. Fixed a bug that caused the shell to inappropriately reuse high-numbered
- file descriptors it used internally.
-
-d. Fixed a bug in pattern replacement word expansions that caused a `/' as
- the first character of an expanded pattern to be mistaken for a global
- replacement specifier.
-
-e. Fixed several problems with the asprintf and snprintf replacement functions
- that caused hangs and crashes.
-
-f. Fixed a bug in the calculation of the current and previous job that caused
- it to refer to incorrect jobs.
-
-g. Fixed a bug in the check for the validity of a hashed command pathname that
- caused unnecessary hash table deletions and additions.
-
-h. Fixed a bug that caused child processes to inherit the wrong value for $!.
-
-i. Fixed a bug that caused `.' to fail to read and execute commands from non-
- regular files such as devices or named pipes.
-
-j. Fixed a bug in printf formatting for the %x and %X expansions that occurred
- on some systems.
-
-k. Fixed a bug that caused the shell to crash when creating temporary files if
- $TMPDIR named a non-writable directory.
-
-l. Fixed a bug that caused the shell to ignore $TMPDIR when creating temporary
- files under some circumstances.
-
-m. Fixed a bug that caused named pipes created by process substitution to not
- be cleaned up.
-
-n. Fixed a bug that caused HISTTIMEFORMAT to not be honored when it appeared
- in the initial shell environment.
-
-o. Fixed several bugs in the expansion of $* and $@ (quoted and unquoted)
- when IFS is null or contains non-whitespace characters; the same changes
- apply to arrays subscripted with * or @.
-
-p. Fixed several problems with pattern substitution expansions on the
- positional parameters and arrays subscripted with * or @ that occurred
- when $IFS was set to the empty string.
-
-q. Made a change to the default locale initialization code that should
- result in better behavior from the locale-aware library functions.
-
-r. Fixed a bug that caused compacting the jobs list to drop jobs.
-
-s. Fixed a bug that caused jumps back to the top-level processing loop from
- a builtin command to leave the shell in an inconsistent state.
-
-t. Fixed a bug that caused characters that would be escaped internally to be
- doubled when escaped with a backslash.
-
-u. Fixed the initialization of mailboxes to not cause maildirs to be read
- (and stat(2) called for every message file) at shell startup.
-
-v. Fixed a bug that caused the shell to not display $PS2 when the read builtin
- reads a line continued with a backslash.
-
-w. Fixed a bug that caused errors in word splitting when $IFS contained
- characters used for internal quoting.
-
-x. Fixed bugs that caused problems with output from shell builtins not being
- completely displayed on some systems.
-
-y. Fixed a bug that caused output to be lost when a redirection is acting on
- the shell's output file descriptor.
-
-z. Fixed bugs caused by shell builtins not checking for all write errors.
-
-aa. Fixed a problem that caused the shell to dump core if expansions on the
- pattern passed to the pattern removal word expansions resulted in expansion
- errors.
-
-bb. Fixed a bug that caused bash to loop infinitely after creating and
- waiting for 4096 jobs.
-
-cc. Fixed a bug that caused bash to lose the status of a background job under
- certain circumstances.
-
-dd. Fixed a bug that caused bash to not look in the temporary environment
- when performing variable lookup under certain circumstances.
-
-ee. Fixed a bug that caused bash to close file descriptors greater than 10
- when they were used in redirections.
-
-ff. Fixed a problem that caused the shell to attempt to read from the standard
- input when called as `bash -i script'.
-
-gg. Fixed a memory leak and variable initialization problems when the -v option
- was supplied to `printf' that could cause incorrect results.
-
-hh. Fixed a bug that caused the `read' builtin to count bytes when the -n option
- was supplied, rather than (possibly multibyte) characters.
-
-ii. Fixed a bug when displaying a function due to not converting the function
- to an external form.
-
-jj. Changed job control initialization to ensure that the shell has a tty
- as its controlling terminal before enabling job control.
-
-kk. Fixed a bug with the `test' builtin that caused it to misinterpret
- arguments beginning with `-' but containing more than one character.
-
-ll. Fixed bug that could cause the shell to dump core in certain cases where
- a command sets the SIGINT disposition to the default.
-
-mm. Fixed a bug in the pattern replacement (affecting both word expansion
- and the `fc' builtin) that occurred when the pattern and replacement
- strings were empty.
-
-nn. Fixed a bug that caused an arithmetic evaluation error to disable all
- further evaluation.
-
-oo. Fixed a bug in pathname expansion that caused it to interpret backslashes
- in the pathname as quoting characters.
-
-pp. Fixed a bug in the replacement getcwd() implementation that could cause
- memory to be overwritten.
-
-qq. When in Posix mode, the `ulimit' builtin now uses a block size of 512 for
- the `-c' and `-f' options.
-
-rr. Brace expansion now allows process substitutions to pass through unchanged.
-
-ss. Fixed a problem in the command name completion code to avoid quoting
- escaped special characters twice when the command name begins with a tilde.
-
-tt. Fixed a problem in the printf builtin that resulted in single-byte
- output for the "'" escape, even when using multibyte characters.
-
-uu. Fixed a bug that caused the failure exit status to be lost when redirections
- attached to a compound command failed.
-
-vv. Fixed a bug that caused the internal random number generator to not be
- re-seeded correctly when creating a subshell.
-
-ww. Fixed a bug that could cause the bash replacement getcwd to overwrite
- memory.
-
-xx. Fixed a bug that caused the shell to not receive SIGINT if it was sent
- while the shell was waiting for a command substitution to terminate, and
- make sure the exit status is correct when it does.
-
-yy. Fixed a bug that resulted in the second and subsequent children spawned
- by a shell begun to run a command substitution being placed into the
- wrong process group.
-
-zz. Fixed a bug that caused the results of successful tilde expansion to be
- subject to pathname expansion and word splitting.
-
-aaa. Fixed a bug that could cause the shell to hang if it encountered an
- error that caused it to jump back to the top processing loop during a
- command substitution or `eval' command.
-
-bbb. Fixed a bug that caused the `read' builtin to use the tty's attributes
- instead of those of the file descriptor passed with the -u option when
- processing the -n and -d options.
-
-ccc. Fixed a bug that caused incorrect expansion of ${array[@]:foo} if the
- first character of $IFS was not whitespace.
-
-ddd. Fixed a bug that occurred when scanning for the ending delimiter of a
- ${parameter/pat/sub} expansion.
-
-eee. Fixed a bug that caused the shell to inappropriately expand command
- substitutions in words when expanding directory names for completion.
-
-fff. Fixed a bug that caused the `fc' builtin to look too far back in the
- history list under certain circumstances.
-
-ggg. Fixed a bug that caused a shell running in Posix mode to search $PWD for
- a file specified as an argument to source/. when the file was not found
- in $PATH.
-
-hhh. Fixed a bug that caused the shell to modify the case of a command word
- found via command completion when the shell was performing case-
- insensitive completion.
-
-iii. Fixed a bug that caused the shell to search $PATH for an argument to
- source/. even when it contained a `/'.
-
-jjj. Fixed a bug that caused brace expansion to misorder expansions when the
- locale did not have a collating order like aAbBcC...zZ.
-
-kkk. Fixed a bug that did not allow `set +o history' to have any effect when
- run in a startup file or from a sourced file.
-
-lll. Fixed a bug with the precedence of the ?: conditional arithmetic operator.
-
-mmm. Fixed a bug that caused side effects of temporary variable assignments
- to persist in the shell environment.
-
-nnn. Fixed a bug that caused the terminal to be left in non-canonical mode
- when using editing commands that invoke the an editor on the current
- command line.
-
-ooo. Fixed a bug that caused globbing characters and characters in $IFS to not
- be quoted appropriately when displaying assignment statements.
-
-ppp. Fixed a bug that caused the `-e' option to be inherited when sourcing a
- file or evaluating a command with `eval' even if the return value of the
- command was supposed to be ignored.
-
-qqq. Fixed a bug that caused the shell to attempt to created variables with
- invalid names if such names appeared in the initial environment.
-
-rrr. Fixed a bug with quote removal in strings where the final character is a
- backslash.
-
-sss. Fixed a bug that caused the effects of special variables to persist even
- when the variables were unset as part of the shell reinitializing itself
- to execute a shell script.
-
-ttt. Fixed a bug that caused the history to not be saved after `history -c' or
- `history -d' was executed until a sufficient number of commands had been
- saved to the history.
-
-uuu. Bash now parses command substitutions according to Posix rules: parsing
- the command contained in $() to find the closing delimiter.
-
-vvv. Fixed a bug that caused traps on SIGCHLD set in a SIGCHLD handler to
- not persist.
-
-www. Fixed a bug that didn't allow SIGCHLD to interrupt the `wait' builtin
- as Posix specifies.
-
-xxx. Invalid numeric arguments to shell builtins no longer cause the shell to
- short-circuit any executing compound command.
-
-yyy. Fixed a bug that caused the exit status to be lost when `break' was
- used to short-circuit a loop's execution.
-
-zzz. Fixed a bug that caused stray ^? characters to be left in expansions of
- "${array[*]}".
-
-aaaa. Bash now prints better error messages for here documents terminated by
- EOF and for identifying the incorrect token in an invalid arithmetic
- expression.
-
-bbbb. Fixed a bug in the variable length word expansion that caused it to
- incorrectly calculate the number of multibyte characters.
-
-cccc. Fixed a race condition that could result in the top-level shell setting
- the terminal's process group to an incorrect value if the process
- group was changed by a child of a child of the shell.
-
-dddd. Fixed a bug that caused here documents belonging to commands within a
- compound command to be displayed in a syntactially-incorrect form, which
- prevented them from being re-read as input.
-
-eeee. The shell displays more warnings about failures to set the locale.
-
-ffff. Fixed a bug that caused the body of a here-document to not be saved to
- the history list.
-
-gggg. Fixed a bug that caused configure to incorrectly conclude that FreeBSD
- had /dev/fd available, resulting in problems with process substitution.
-
-2. Changes to Readline
-
-a. Fixed a number of redisplay errors in environments supporting multibyte
- characters.
-
-b. Fixed bugs in vi command mode that caused motion commands to inappropriately
- set the mark.
-
-c. When using the arrow keys in vi insertion mode, readline allows movement
- beyond the current end of the line (unlike command mode).
-
-d. Fixed bugs that caused readline to loop when the terminal has been taken
- away and reads return -1/EIO.
-
-e. Fixed bugs in redisplay occurring when displaying prompts containing
- invisible characters.
-
-f. Fixed a bug that caused the completion append character to not be reset to
- the default after an application-specified completion function changed it.
-
-g. Fixed a problem that caused incorrect positioning of the cursor while in
- emacs editing mode when moving forward at the end of a line while using
- a locale supporting multibyte characters.
-
-h. Fixed an off-by-one error that caused readline to drop every 511th
- character of buffered input.
-
-i. Fixed a bug that resulted in SIGTERM not being caught or cleaned up.
-
-j. Fixed redisplay bugs caused by multiline prompts with invisible characters
- or no characters following the final newline.
-
-k. Fixed redisplay bug caused by prompts consisting solely of invisible
- characters.
-
-l. Fixed a bug in the code that buffers characters received very quickly in
- succession which caused characters to be dropped.
-
-m. Fixed a bug that caused readline to reference uninitialized data structures
- if it received a SIGWINCH before completing initialzation.
-
-n. Fixed a bug that caused the vi-mode `last command' to be set incorrectly
- and therefore unrepeatable.
-
-o. Fixed a bug that caused readline to disable echoing when it was being used
- with an output file descriptor that was not a terminal.
-
-p. Readline now blocks SIGINT while manipulating internal data structures
- during redisplay.
-
-q. Fixed a bug in redisplay that caused readline to segfault when pasting a
- very long line (over 130,000 characters).
-
-r. Fixed bugs in redisplay when using prompts with no visible printing
- characters.
-
-3. New Features in Bash
-
-a. When using substring expansion on the positional parameters, a starting
- index of 0 now causes $0 to be prefixed to the list.
-
-b. The `help' builtin now prints its columns with entries sorted vertically
- rather than horizontally.
-
-c. There is a new variable, $BASHPID, which always returns the process id of
- the current shell.
-
-d. There is a new `autocd' option that, when enabled, causes bash to attempt
- to `cd' to a directory name that is supplied as the first word of a
- simple command.
-
-e. There is a new `checkjobs' option that causes the shell to check for and
- report any running or stopped jobs at exit.
-
-f. The programmable completion code exports a new COMP_TYPE variable, set to
- a character describing the type of completion being attempted.
-
-g. The programmable completion code exports a new COMP_KEY variable, set to
- the character that caused the completion to be invoked (e.g., TAB).
-
-h. If creation of a child process fails due to insufficient resources, bash
- will try again several times before reporting failure.
-
-i. The programmable completion code now uses the same set of characters as
- readline when breaking the command line into a list of words.
-
-j. The block multiplier for the ulimit -c and -f options is now 512 when in
- Posix mode, as Posix specifies.
-
-k. Changed the behavior of the read builtin to save any partial input received
- in the specified variable when the read builtin times out. This also
- results in variables specified as arguments to read to be set to the empty
- string when there is no input available. When the read builtin times out,
- it returns an exit status greater than 128.
-
-l. The shell now has the notion of a `compatibility level', controlled by
- new variables settable by `shopt'. Setting this variable currently
- restores the bash-3.1 behavior when processing quoted strings on the rhs
- of the `=~' operator to the `[[' command.
-
-m. The `ulimit' builtin now has new -b (socket buffer size) and -T (number
- of threads) options.
-
-n. The -p option to `declare' now displays all variable values and attributes
- (or function values and attributes if used with -f).
-
-o. There is a new `compopt' builtin that allows completion functions to modify
- completion options for existing completions or the completion currently
- being executed.
-
-p. The `read' builtin has a new -i option which inserts text into the reply
- buffer when using readline.
-
-q. A new `-E' option to the complete builtin allows control of the default
- behavior for completion on an empty line.
-
-r. There is now limited support for completing command name words containing
- globbing characters.
-
-s. Changed format of internal help documentation for all builtins to roughly
- follow man page format.
-
-t. The `help' builtin now has a new -d option, to display a short description,
- and a -m option, to print help information in a man page-like format.
-
-u. There is a new `mapfile' builtin to populate an array with lines from a
- given file.
-
-v. If a command is not found, the shell attempts to execute a shell function
- named `command_not_found_handle', supplying the command words as the
- function arguments.
-
-w. There is a new shell option: `globstar'. When enabled, the globbing code
- treats `**' specially -- it matches all directories (and files within
- them, when appropriate) recursively.
-
-x. There is a new shell option: `dirspell'. When enabled, the filename
- completion code performs spelling correction on directory names during
- completion.
-
-y. The `-t' option to the `read' builtin now supports fractional timeout
- values.
-
-z. Brace expansion now allows zero-padding of expanded numeric values and
- will add the proper number of zeroes to make sure all values contain the
- same number of digits.
-
-aa. There is a new bash-specific bindable readline function: `dabbrev-expand'.
- It uses menu completion on a set of words taken from the history list.
-
-bb. The command assigned to a key sequence with `bind -x' now sets two new
- variables in the environment of the executed command: READLINE_LINE_BUFFER
- and READLINE_POINT. The command can change the current readline line
- and cursor position by modifying READLINE_LINE_BUFFER and READLINE_POINT,
- respectively.
-
-cc. There is a new &>> redirection operator, which appends the standard output
- and standard error to the named file.
-
-dd. The parser now understands `|&' as a synonym for `2>&1 |', which redirects
- the standard error for a command through a pipe.
-
-ee. The new `;&' case statement action list terminator causes execution to
- continue with the action associated with the next pattern in the
- statement rather than terminating the command.
-
-ff. The new `;;&' case statement action list terminator causes the shell to
- test the next set of patterns after completing execution of the current
- action, rather than terminating the command.
-
-gg. The shell understands a new variable: PROMPT_DIRTRIM. When set to an
- integer value greater than zero, prompt expansion of \w and \W will
- retain only that number of trailing pathname components and replace
- the intervening characters with `...'.
-
-hh. There are new case-modifying word expansions: uppercase (^[^]) and
- lowercase (,[,]). They can work on either the first character or
- array element, or globally. They accept an optional shell pattern
- that determines which characters to modify. There is an optionally-
- configured feature to include capitalization operators.
-
-ii. The shell provides associative array variables, with the appropriate
- support to create, delete, assign values to, and expand them.
-
-jj. The `declare' builtin now has new -l (convert value to lowercase upon
- assignment) and -u (convert value to uppercase upon assignment) options.
- There is an optionally-configurable -c option to capitalize a value at
- assignment.
-
-kk. There is a new `coproc' reserved word that specifies a coprocess: an
- asynchronous command run with two pipes connected to the creating shell.
- Coprocs can be named. The input and output file descriptors and the
- PID of the coprocess are available to the calling shell in variables
- with coproc-specific names.
-
-4. New Features in Readline
-
-a. A new variable, rl_sort_completion_matches; allows applications to inhibit
- match list sorting (but beware: some things don't work right if
- applications do this).
-
-b. A new variable, rl_completion_invoking_key; allows applications to discover
- the key that invoked rl_complete or rl_menu_complete.
-
-c. The functions rl_block_sigint and rl_release_sigint are now public and
- available to calling applications who want to protect critical sections
- (like redisplay).
-
-d. The functions rl_save_state and rl_restore_state are now public and
- available to calling applications; documented rest of readline's state
- flag values.
-
-e. A new user-settable variable, `history-size', allows setting the maximum
- number of entries in the history list.
-
-f. There is a new implementation of menu completion, with several improvements
- over the old; the most notable improvement is a better `completions
- browsing' mode.
-
-g. The menu completion code now uses the rl_menu_completion_entry_function
- variable, allowing applications to provide their own menu completion
- generators.
-
-h. There is support for replacing a prefix of a pathname with a `...' when
- displaying possible completions. This is controllable by setting the
- `completion-prefix-display-length' variable. Matches with a common prefix
- longer than this value have the common prefix replaced with `...'.
-
-i. There is a new `revert-all-at-newline' variable. If enabled, readline will
- undo all outstanding changes to all history lines when `accept-line' is
- executed.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.2-release,
-and the previous version, bash-3.2-beta.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused the temporary environment passed to a command to
- affect the shell's environment under certain circumstances.
-
-b. Fixed a bug in the printf builtin that caused the %q format specifier to
- ignore empty string arguments.
-
-c. Improved multibyte character environment detection at configuration time.
-
-d. Fixed a bug in the read builtin that left spurious escape characters in the
- input after processing backslashes when assigning to an array variable.
-
-2. Changes to Readline
-
-a. Fixed a redisplay bug that occurred in multibyte-capable locales when the
- prompt was one character longer than the screen width.
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.2-beta,
-and the previous version, bash-3.2-alpha.
-
-1. Changes to Bash
-
-a. Changed the lexical analyzer to treat locale-specific blank characters as
- white space.
-
-b. Fixed a bug in command printing to avoid confusion between redirections and
- process substitution.
-
-c. Fixed problems with cross-compiling originating from inherited environment
- variables.
-
-d. Added write error reporting to printf builtin.
-
-e. Fixed a bug in the variable expansion code that could cause a core dump in
- a multi-byte locale.
-
-f. Fixed a bug that caused substring expansion of a null string to return
- incorrect results.
-
-g. BASH_COMMAND now retains its previous value while executing commands as the
- result of a trap, as the documentation states.
-
-2. Changes to Readline
-
-a. Fixed a bug with prompt redisplay in a multi-byte locale to avoid redrawing
- the prompt and input line multiple times.
-
-b. Fixed history expansion to not be confused by here-string redirection.
-
-c. Readline no longer treats read errors by converting them to newlines, as
- it does with EOF. This caused partial lines to be returned from readline().
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.2-alpha,
-and the previous version, bash-3.1-release.
-
-1. Changes to Bash
-
-a. Fixed a source bug that caused the minimal configuration to not compile.
-
-b. Fixed memory leaks in error handling for the `read' builtin.
-
-c. Changed the [[ and (( compound commands to set PIPESTATUS with their exit
- status.
-
-d. Fixed some parsing problems with compound array assignments.
-
-e. Added additional configuration changes for: NetBSD (incomplete multibyte
- character support)
-
-f. Fixed two bugs with local array variable creation when shadowing a variable
- of the same name from a previous context.
-
-g. Fixed the `read' builtin to restore the correct set of completion functions
- if a timeout occurs.
-
-h. Added code to defer the initialization of HISTSIZE (and its stifling of the
- history list) until the history file is loaded, allowing a startup file to
- override the default value.
-
-i. Tightened up the arithmetic expression parsing to produce better error
- messages when presented with invalid operators.
-
-j. Fixed the cross-compilation support to build the signal list at shell
- invocation rather than compile time if cross-compiling.
-
-k. Fixed multibyte support for non-gcc compilers (or compilers that do not
- allow automatic array variable sizing based on a non-constant value).
-
-l. Several fixes to the code that manages the list of terminated jobs and
- their exit statuses, and the list of active and recently-terminated jobs
- to avoid pid aliasing/wraparound and allocation errors.
-
-m. Fixed a problem that allowed scripts to die due to SIGINT while waiting
- for children, even when started in the background or otherwise ignoring
- SIGINT.
-
-n. Fixed a bug that caused shells invoked as -/bin/bash from not being
- recognized as login shells.
-
-o. Fixed a problem that caused shells in the background to give the terminal
- to a process group other than the foreground shell process group.
-
-p. Fixed a problem with extracting the `varname' in ${#varname}.
-
-q. Fixed the code that handles SIGQUIT to not exit immediately -- thereby
- calling functions that may not be called in a signal handler context --
- but set a flag and exit afterward (like SIGINT).
-
-r. Changed the brace expansion code to skip over braces that don't begin a
- valid matched brace expansion construct.
-
-s. Fixed `typeset' and `declare' to not require that their shell function
- operands to be valid shell identifiers.
-
-t. Changed `test' to use access(2) with a temporary uid/euid swap when testing
- file attributes and running setuid, and access(2) in most other cases.
-
-u. Changed completion code to not attempt command name completion on a line
- consisting solely of whitespace when no_empty_command_completion is set.
-
-v. The `hash' builtin now prints nothing in posix mode when the hash table is
- empty, and prints a message to that effect to stdout instead of stderr
- when not in posix mode.
-
-w. Fixed a bug in the extended pattern matching code that caused it to fail to
- match periods with certain patterns.
-
-x. Fixed a bug that caused the shell to dump core when performing filename
- generation in directories with thousands of files.
-
-y. Returned to the original Bourne shell rules for parsing ``: no recursive
- parsing of embedded quoted strings or ${...} constructs.
-
-z. The inheritence of the DEBUG, RETURN, and ERR traps is now dependent only
- on the settings of the `functrace' and `errtrace' shell options, rather
- than whether or not the shell is in debugging mode.
-
-aa. Fixed a problem with $HOME being converted to ~ in the expansion of
- members of the DIRSTACK array.
-
-bb. Fixed a problem with quoted arguments to arithmetic expansions in certain
- constructs.
-
-cc. The command word completion code now no longer returns matching directories
- while searching $PATH.
-
-dd. Fixed a bug with zero-padding and precision handling in snprintf()
- replacement.
-
-ee. Fixed a bug that caused the command substitution code not to take embedded
- shell comments into account.
-
-ff. Fixed a bug that caused $((...);(...)) to be misinterpreted as an
- arithmetic substitution.
-
-gg. Fixed a bug in the prompt expansion code that inappropriately added a
- \001 before a \002 under certain circumstances.
-
-hh. Fixed a bug that caused `unset LANG' to not properly reset the locale
- (previous versions would set the locale back to what it was when bash
- was started rather than the system's "native" locale).
-
-ii. Fixed a bug that could cause file descriptors > 10 to not be closed even
- when closed explicitly by a script.
-
-jj. Fixed a bug that caused single quotes to be stripped from ANSI-C quoting
- inside double-quoted command substitutions.
-
-kk. Fixed a bug that could cause core dumps when `return' was executed as the
- last element of a pipeline inside a shell function.
-
-ll. Fixed a bug that caused DEBUG trap strings to overwrite commands stored in
- the jobs list.
-
-2. Changes to Readline
-
-a. Fixed a problem that caused segmentation faults when using readline in
- callback mode and typing consecutive DEL characters on an empty line.
-
-b. Fixed several redisplay problems with multibyte characters, all having to
- do with the different code paths and variable meanings between single-byte
- and multibyte character redisplay.
-
-c. Fixed a problem with key sequence translation when presented with the
- sequence \M-\C-x.
-
-d. Fixed a problem that prevented the `a' command in vi mode from being
- undone and redone properly.
-
-e. Fixed a problem that prevented empty inserts in vi mode from being undone
- properly.
-
-f. Fixed a problem that caused readline to initialize with an incorrect idea
- of whether or not the terminal can autowrap.
-
-g. Fixed output of key bindings (like bash `bind -p') to honor the setting of
- convert-meta and use \e where appropriate.
-
-h. Changed the default filename completion function to call the filename
- dequoting function if the directory completion hook isn't set. This means
- that any directory completion hooks need to dequote the directory name,
- since application-specific hooks need to know how the word was quoted,
- even if no other changes are made.
-
-i. Fixed a bug with creating the prompt for a non-interactive search string
- when there are non-printing characters in the primary prompt.
-
-j. Fixed a bug that caused prompts with invisible characters to be redrawn
- multiple times in a multibyte locale.
-
-k. Fixed a bug that could cause the key sequence scanning code to return the
- wrong function.
-
-l. Fixed a problem with the callback interface that caused it to fail when
- using multi-character keyboard macros.
-
-m. Fixed a bug that could cause a core dump when an edited history entry was
- re-executed under certain conditions.
-
-n. Fixed a bug that caused readline to reference freed memory when attmpting
- to display a portion of the prompt.
-
-3. New Features in Bash
-
-a. Changed the parameter pattern replacement functions to not anchor the
- pattern at the beginning of the string if doing global replacement - that
- combination doesn't make any sense.
-
-b. When running in `word expansion only' mode (--wordexp option), inhibit
- process substitution.
-
-c. Loadable builtins now work on MacOS X 10.[34].
-
-d. Shells running in posix mode no longer set $HOME, as POSIX requires.
-
-e. The code that checks for binary files being executed as shell scripts now
- checks only for NUL rather than any non-printing character.
-
-f. Quoting the string argument to the [[ command's =~ operator now forces
- string matching, as with the other pattern-matching operators.
-
-4. New Features in Readline
-
-a. Calling applications can now set the keyboard timeout to 0, allowing
- poll-like behavior.
-
-b. The value of SYS_INPUTRC (configurable at compilation time) is now used as
- the default last-ditch startup file.
-
-c. The history file reading functions now allow windows-like \r\n line
- terminators.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.1-release,
-and the previous version, bash-3.1-rc2.
-
-1. Changes to Readline
-
-a. Several changes to the multibyte redisplay code to fix problems with
- prompts containing invisible characters.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.1-rc2,
-and the previous version, bash-3.1-rc1.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused a DEBUG trap to overwrite a command string that's
- eventually attached to a background job.
-
-b. Changed some code so that filenames with leading tildes with spaces in the
- name aren't tilde-expanded by the bash completion code.
-
-c. Fixed a bug that caused the pushd builtin to fail to change to
- directories with leading `-'.
-
-d. Fixed a small memory leak in the programmable completion code.
-
-2. Changes to Readline
-
-a. Fixed a redisplay bug caused by moving the cursor vertically to a line
- with invisible characters in the prompt in a multibyte locale.
-
-b. Fixed a bug that could cause the terminal special chars to be bound in the
- wrong keymap in vi mode.
-
-3. New Features in Bash
-
-a. If compiled for strict POSIX conformance, LINES and COLUMNS may now
- override the true terminal size.
-
-4. New Features in Readline
-
-a. A new external application-controllable variable that allows the LINES
- and COLUMNS environment variables to set the window size regardless of
- what the kernel returns.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.1-rc1,
-and the previous version, bash-3.1-beta1.
-
-1. Changes to Bash
-
-a. Fixed a bug that could cause core dumps due to accessing the current
- pipeline while in the middle of modifying it.
-
-b. Fixed a bug that caused pathnames with backslashes still quoting characters
- to be passed to opendir().
-
-c. Command word completion now obeys the setting of completion-ignore-case.
-
-d. Fixed a problem with redirection that caused file descriptors greater than
- 2 to be inappropriately marked as close-on-exec.
-
-e. In Posix mode, after `wait' is called to wait for a particular process
- explicitly, that process is removed from the list of processes known to
- the shell, and subsequent attempts to wait for it return errors.
-
-f. Fixed a bug that caused extended pattern matching to incorrectly scan
- backslash-escaped pattern characters.
-
-g. Fixed a synchronization problem that could cause core dumps when handling
- a SIGWINCH.
-
-h. Fixed a bug that caused an unmatched backquote to be accepted without an
- error when processing here documents.
-
-i. Fixed a small memory leak in the `cd' builtin.
-
-j. Fix for MacOS X so it gets the values for the HOSTTYPE, MACHTYPE, and
- OSTYPE variables at build time, to support universal binaries.
-
-k. Fixed a bug that could cause an exit trap to return the exit status of
- the trap command rather than the status as it was before the trap was
- run as the shell's exit status.
-
-2. New Features in Bash
-
-3. Changes to Readline
-
-a. Fixed a bug that caused reversing the incremental search direction to
- not work correctly.
-
-b. Fixed the vi-mode `U' command to only undo up to the first time insert mode
- was entered, as Posix specifies.
-
-c. Fixed a bug in the vi-mode `r' command that left the cursor in the wrong
- place.
-
-4. New Features in Readline
-
-a. New application-callable auxiliary function, rl_variable_value, returns
- a string corresponding to a readline variable's value.
-
-b. When parsing inputrc files and variable binding commands, the parser
- strips trailing whitespace from values assigned to boolean variables
- before checking them.
-
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.1-beta1,
-and the previous version, bash-3.1-alpha1.
-
-1. Changes to Bash
-
-a. Added some system-specific signal names.
-
-b. Fixed a typo in the ulimit builtin to make `x' the right option to
- maniuplate the limit on file locks.
-
-c. Fixed a problem with using += to append to index 0 of an array variable
- when not using subscript syntax.
-
-d. A few changes to configure.in to remove calls to obsolete or outdated
- macros.
-
-e. Make sure changes to variables bash handles specially (e.g., LC_ALL) are
- made when the variable is set in the temporary environment to a command.
-
-f. Make sure changes to variables bash handles specially (e.g., LC_ALL) are
- made when the variable is modified using `printf -v'.
-
-g. The export environment is now remade on cygwin when HOME is changed, so
- DLLs bash is linked against pick up the new value. This fixes problems
- with tilde expansion when linking against and already-installed readline.
-
-h. Small fix to the logic for performing tilde expansion in posix mode, so
- expansion on the right-hand side of an assignment statement takes place.
-
-i. Fixed a bug that prevented redirections associated with a shell function
- from being executed when in a subshell.
-
-j. Fixed `source' and `.' builtins to not require an executable file when
- searching $PATH for a file to source.
-
-k. Fixed a bug that caused incorrect word splitting in a function when IFS
- was declared local, then unset.
-
-l. Fixed a problem with the `kill' builtin that prevented sending signals
- to a process group under certain circumstances when providing a pid < 0.
-
-m. When in POSIX mode, `pwd' now checks that the value it prints is the same
- directory as `.', even when displaying $PWD.
-
-n. Fixed a problem with the `read' builtin when reading a script from standard
- input and reading data from the same file.
-
-o. Fixed a problem with the `type' and `command' builtins that caused absolute
- pathnames to be displayed incorrectly.
-
-p. Some changes to the `bg' builtin for POSIX conformance.
-
-q. The `fc' builtin now removes the `fc' command that caused it to invoke an
- editor on specified history entries from the history entirely, rather than
- simply ignoring it.
-
-r. When in POSIX mode, the `v' command in vi editing mode simply invokes vi
- on the current command, rather than checking $FCEDIT and $EDITOR.
-
-s. Fixed a small memory leak in the pathname canonicalization code.
-
-t. Fixed a bug that caused the expanded value of a $'...' string to be
- incorrectly re-quoted if it occurred within a double-quoted ${...}
- parameter expansion.
-
-u. Restored default emacs-mode key binding of M-TAB to dynamic-complete-history.
-
-v. Fixed a bug that caused core dumps when interrupting loops running builtins
- on some systems.
-
-w. Make sure that some of the functions bash provides replacements for are
- not cpp defines.
-
-x. The code that scans embedded commands for the parser (`...` and $(...)) is
- now more aware of embedded comments and their effect on quoted strings.
-
-y. Changed the `-n' option to the `history' builtin to not reset the number of
- history lines read in the current session after reading the new lines from
- the history file if the history is being appended when it is written to
- the file, since the appending takes care of the problem that the adjustment
- was intended to solve.
-
-z. Improved the error message displayed when a shell script fails to execute
- because the environment and size of command line arguments are too large.
-
-aa. A small fix to make sure that $HISTCMD is evaluated whenever the shell is
- saving commands to the history list, not just when HISTSIZE is defined.
-
-2. Changes to Readline
-
-a. The `change-case' command now correctly changes the case of multibyte
- characters.
-
-b. Changes to the shared library construction scripts to deal with Windows
- DLL naming conventions for Cygwin.
-
-c. Fixed the redisplay code to avoid core dumps resulting from a poorly-timed
- SIGWINCH.
-
-d. Fixed the non-incremental search code in vi mode to dispose of any current
- undo list when copying a line from the history into the current editing
- buffer.
-
-e. The variable assignment code now ignores whitespace at the end of lines
- when assigning to boolean variables.
-
-f. The `C-w' binding in incremental search now understands multibyte
- characters.
-
-3. New Features in Bash
-
-a. A new configuration option, `--enable-strict-posix-default', which will
- build bash to be POSIX conforming by default.
-
-4. New Features in Readline
-
-a. If the rl_completion_query_items is set to a value < 0, readline never
- asks the user whether or not to view the possible completions.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.1-alpha1,
-and the previous version, bash-3.0-release.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused bash to crash if referencing an unset local array.
-
-b. Fixed a problem that caused tilde expansion to not be performed before
- attempting globbing word completion.
-
-c. Fixed an incompatibility so that a first argument to trap that's a valid
- signal number will be trated as a signal rather than a command to execute.
-
-d. Fixed ${#word} expansion to correctly compute the length of a string
- containing multibyte characters.
-
-e. Fixed a bug that caused bash to not pass the correct flags for signal
- disposition to child processes.
-
-f. Fixed a bug that caused `fc -l' to list one too many history entries.
-
-g. Some fixes to `fc' for POSIX conformance.
-
-h. Some fixes to job status display for POSIX conformance.
-
-i. Fixed a bug that caused `command -v' to display output if a command was not
- found -- it should be silent.
-
-j. In POSIX mode, `type' and `command -[vV]' do not report non-executable
- files, even if the shell will attempt to execute them.
-
-k. Fixed a bug that caused the `==' operator to the [[ command to not attempt
- extended pattern matching.
-
-l. Fixed the brace expansion code to handle characters whose value exceeds 128.
-
-m. Fixed `printf' to handle strings with a leading `\0' whose length is
- non-zero.
-
-n. Fixed a couple of problems with brace expansion where `${' was handled
- incorrectly.
-
-o. Fixed off-by-one error when calculating the upper bound of `offset' when
- processing the ${array[@]:offset:length} expansion.
-
-p. System-specific configuration changes for: FreeBSD 5.x, Interix, MacOS X
- 10.4, Linux 2.4+ kernels, Linux 3.x kernels, Dragonfly BSD, QNX 6.x,
- Cygwin
-
-q. Fixed a bug that caused the shell to ignore the status of the rightmost
- command in a pipeline when the `pipefail' option was enabled.
-
-r. Fixed a completion bug that caused core dumps when expanding a directory
- name.
-
-s. Fixed a bug that prevented `hash -d' from removing commands from the hash
- table.
-
-t. Fixed word splitting to avoid really bad quadratic performance when
- expanding long lists.
-
-u. Fixed a bug that caused negative offsets in substring expansion to use the
- wrong values.
-
-v. Fixed a bug in printf that caused it to not return failure on write errors.
-
-w. Fixed a bug that caused commands in subshells to not be properly timed.
-
-x. The shell parser no longer attempts to parse a compound assignment specially
- unless in a position where an assignment statement is acceptable or parsing
- arguments to a builtin that accepts assignment statements.
-
-y. Fixed a problem that caused a `case' statement to be added to the history
- incorrectly as a single command if the `case word' was on one line and the
- `in' on another.
-
-z. Fixed a problem that caused internal shell quoting characters to be
- incorrectly quoted with backslashes under some circumstances.
-
-aa. The shell now performs correct word splitting when IFS contains multibyte
- characters.
-
-bb. The mail checking code now resets the cached file information if the size
- drops to 0, even if the times don't change.
-
-cc. A completed command name that is found in $PATH as well as the name of a
- directory in the current directory no longer has a slash appended in certain
- circumstances: a single instance found in $PATH when `.' is not in $PATH,
- and multiple instances found in $PATH, even when `.' is in $PATH.
-
-dd. Incorporated tilde expansion into the word expansion code rather than as a
- separately-called function, fixing some cases where it was performed
- inappropriately (e.g., after the second `=' in an assignment statement or
- in a double-quoted parameter expansion).
-
-ee. Fixed several bugs encountered when parsing compound assignment statements,
- so that compound assignments appearing as arguments to builtins are no
- longer double-expanded.
-
-ff. Fixed a bug in the command execution code that caused asynchronous commands
- containing command substitutions to not put the terminal in the wrong
- process group.
-
-gg. Bash now handles the case where the WCONTINUED flag causes waitpid() to
- return -1/EINVAL at runtime as well as configuration time.
-
-hh. Fixed parser to generate an error when the pipeline `argument' to `!' or
- `time' is NULL.
-
-ii. The shell now takes a little more care when manipulating file descriptors
- greater than 9 with the `exec' builtin.
-
-jj. Fixed a bug that caused variable assignments preceding the `command' builtin
- preceding a special builtin to be preserved after the command completed in
- POSIX mode.
-
-kk. Fixed a bug that allowed variables beginning with a digit to be created.
-
-ll. Fixed a bug that caused a \<newline> to be removed when parsing a $'...'
- construct.
-
-mm. A shell whose name begins with `-' will now be a restricted shell if the
- remainder of the name indicates it should be restricted.
-
-nn. Fixed a bug that could cause a core dump if FUNCNAME were changed or unset
- during a function's execution.
-
-oo. Fixed a bug that caused executing a `return' in a function to not execute
- a RETURN trap. The RETURN trap is inherited by shell functions only if
- function tracing is globally enabled or has been enabled for that function.
-
-pp. Fixed cases where var[@] was not handled exactly like var, when var is a
- scalar variable.
-
-qq. Fixed a bug that caused the first character after a SIGINT to be discarded
- under certain circumstances.
-
-rr. Fixed exit status code so that a suspended job returns 128+signal as its
- exit status (preventing commands after it in `&&' lists from being
- executed).
-
-ss. Fixed a bug that caused the shell parser state to be changed by executing
- a shell function as a result of word completion.
-
-tt. Fixed a long-standing bug that caused '\177' characters in variable
- values to be discarded when expanded in double-quoted strings.
-
-uu. Fixed a bug that caused $RANDOM to be re-seeded multiple times in a
- subshell environment.
-
-vv. Extensive changes to the job management code to avoid the pid-reuse and
- pid-aliasing problems caused by retaining the exit status of too many jobs,
- but still retain as many background job statuses as POSIX requires.
-
-ww. Fixed a parser bug in processing \<newline> that caused things like
-
- ((echo 5) \
- (echo 6))
-
- to not work correctly.
-
-xx. `pwd -P' now sets $PWD to a directory name containing no symbolic links
- when in posix mode, as POSIX requires.
-
-yy. In posix mode, bash no longer sets $PWD to a name containing no symbolic
- links if a directory is chosen from $CDPATH.
-
-zz. The word splitting code now treats an IFS character that is not space,
- tab, or newline and any adjacent IFS white space as a single delimiter, as
- SUSv3/XPG6 require.
-
-aaa. The `read' builtin now checks whether or not the number of fields read is
- exactly the same as the number of variables instead of just assigning the
- rest of the line (minus any trailing IFS white space) to the last
- variable. This is what POSIX/SUS/XPG all require.
-
-bbb. Fixed a bug that caused `read' to always check whether or not fd 0 was a
- pipe, even when reading from another file descriptor.
-
-ccc. Fixed a bug that caused short-circuiting of execution even if the return
- value was being inverted.
-
-ddd. Fixed a bug that caused a core dump while decoding \W escapes in PS1 if
- PWD was unset.
-
-eee. Fixed a bug in `read' that counted internal quoting characters for the
- purposes of `read -n'.
-
-fff. Fixed a bug so that a function definition in a pipeline causes a child
- process to be forked at the right time.
-
-ggg. Bash will not attempt to link against a readline library that doesn't
- have rl_gnu_readline_p == 1.
-
-hhh. Fixed a bug that caused `read' to consume one too many characters when
- reading a fixed number of characters and the Nth character is a backslash.
-
-iii. Fixed a bug that caused `unset' on variables in the temporary environment
- to leave them set when `unset' completed.
-
-jjj. Fixed a bug that caused bash to close fd 2 if an `exec' failed and the
- shell didn't exit.
-
-kkk. The completion code is more careful to not turn `/' or `///' into `//',
- for those systems on which `//' has special meaning.
-
-lll. Fixed a bug that caused command substitution in asynchronous commands to
- close the wrong file descriptors.
-
-mmm. The shell no longer prints status messages about terminated background
- processes unless job control is active.
-
-nnn. Fixed a bug that prevented multiple consecutive invocations of `history -s'
- from adding all the commands to the history list.
-
-ooo. Added a couple of changes to make arithmetic expansion more consistent in
- all its contexts (still not perfect).
-
-ppp. Fixed a bug that caused the parser to occasionally not find the right
- terminating "`" in an old-style command substitution.
-
-qqq. Fixed a bug that caused core dumps when the shell was reading its non-
- interactive input from fd 0 and fd 0 was duplicated and restored using a
- combination of `exec' (to save) and redirection (to restore).
-
-rrr. Fixed a problem that caused loops in sourced scripts to not be cleaned
- up properly when a `return' is executed.
-
-sss. Change internal command substitution completion function to append a slash
- to directory names in the command.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused multiliine prompts to be wrapped and displayed
- incorrectly.
-
-b. Fixed a bug that caused ^P/^N in emacs mode to fail to display the current
- line correctly.
-
-c. Fixed a problem in computing the number of invisible characters on the first
- line of a prompt whose length exceeds the screen width.
-
-d. Fixed vi-mode searching so that failure preserves the current line rather
- than the last line in the history list.
-
-e. Fixed the vi-mode `~' command (change-case) to have the correct behavior at
- end-of-line when manipulating multibyte characters.
-
-f. Fixed the vi-mode `r' command (change-char) to have the correct behavior at
- end-of-line when manipulating multibyte characters.
-
-g. Fixed multiple bugs in the redisplay of multibyte characters: displaying
- prompts longer than the screen width containing multibyte characters,
-
-h. Fix the calculation of the number of physical characters in the prompt
- string when it contains multibyte characters.
-
-i. A non-zero value for the `rl_complete_suppress_append' variable now causes
- no `/' to be appended to a directory name.
-
-j. Fixed forward-word and backward-word to work when words contained
- multibyte characters.
-
-k. Fixed a bug in finding the delimiter of a `?' substring when performing
- history expansion in a locale that supports multibyte characters.
-
-l. Fixed a memory leak caused by not freeing the timestamp in a history entry.
-
-m. Fixed a bug that caused "\M-x" style key bindings to not obey the setting
- of the `convert-meta' variable.
-
-n. Fixed saving and restoring primary prompt when prompting for incremental
- and non-incremental searches; search prompts now display multibyte
- characters correctly.
-
-o. Fixed a bug that caused keys originally bound to self-insert but shadowed
- by a multi-character key sequence to not be inserted.
-
-p. Fixed code so rl_prep_term_function and rl_deprep_term_function aren't
- dereferenced if NULL (matching the documentation).
-
-q. Extensive changes to readline to add enough state so that commands
- requiring additional characters (searches, multi-key sequences, numeric
- arguments, commands requiring an additional specifier character like
- vi-mode change-char, etc.) work without synchronously waiting for
- additional input.
-
-r. Lots of changes so readline builds and runs on MinGW.
-
-s. Readline no longer tries to modify the terminal settings when running in
- callback mode.
-
-t. The Readline display code no longer sets the location of the last invisible
- character in the prompt if the \[\] sequence is empty.
-
-3. New Features in Bash
-
-a. Bash now understands LC_TIME as a special variable so that time display
- tracks the current locale.
-
-b. BASH_ARGC, BASH_ARGV, BASH_SOURCE, and BASH_LINENO are no longer created
- as `invisible' variables and may not be unset.
-
-c. In POSIX mode, if `xpg_echo' option is enabled, the `echo' builtin doesn't
- try to interpret any options at all, as POSIX requires.
-
-d. The `bg' builtin now accepts multiple arguments, as POSIX seems to specify.
-
-e. Fixed vi-mode word completion and glob expansion to perform tilde
- expansion.
-
-f. The `**' mathematic exponentiation operator is now right-associative.
-
-g. The `ulimit' builtin has new options: -i (max number of pending signals),
- -q (max size of POSIX message queues), and -x (max number of file locks).
-
-h. A bare `%' once again expands to the current job when used as a job
- specifier.
-
-i. The `+=' assignment operator (append to the value of a string or array) is
- now supported for assignment statements and arguments to builtin commands
- that accept assignment statements.
-
-j. BASH_COMMAND now preserves its value when a DEBUG trap is executed.
-
-k. The `gnu_errfmt' option is enabled automatically if the shell is running
- in an emacs terminal window.
-
-l. New configuration option: --single-help-strings. Causes long help text
- to be written as a single string; intended to ease translation.
-
-m. The COMP_WORDBREAKS variable now causes the list of word break characters
- to be emptied when the variable is unset.
-
-n. An unquoted expansion of $* when $IFS is empty now causes the positional
- parameters to be concatenated if the expansion doesn't undergo word
- splitting.
-
-o. Bash now inherits $_ from the environment if it appears there at startup.
-
-p. New shell option: nocasematch. If non-zero, shell pattern matching ignores
- case when used by `case' and `[[' commands.
-
-q. The `printf' builtin takes a new option: -v var. That causes the output
- to be placed into var instead of on stdout.
-
-r. By default, the shell no longer reports processes dying from SIGPIPE.
-
-s. Bash now sets the extern variable `environ' to the export environment it
- creates, so C library functions that call getenv() (and can't use the
- shell-provided replacement) get current values of environment variables.
-
-4. New Features in Readline
-
-a. The key sequence sent by the keypad `delete' key is now automatically
- bound to delete-char.
-
-b. A negative argument to menu-complete now cycles backward through the
- completion list.
-
-c. A new bindable readline variable: bind-tty-special-chars. If non-zero,
- readline will bind the terminal special characters to their readline
- equivalents when it's called (on by default).
-
-d. New bindable command: vi-rubout. Saves deleted text for possible
- reinsertion, as with any vi-mode `text modification' command; `X' is bound
- to this in vi command mode.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.0-release,
-and the previous version, bash-3.0-rc1.
-
-1. Changes to Bash
-
-a. Fixed a boundary overrun that could cause segmentation faults when the
- completion code hands an incomplete construct to the word expansion
- functions.
-
-b. Changed posix mode behavior so that an error in a variable assignment
- preceding a special builtin causes a non-interactive shell to exit.
-
-c. Change the directory expansion portion of the completion code to not
- expand embedded command substitutions if the directory name appears in
- the file system.
-
-d. Fixed a problem that caused `bash -r' to turn on restrictions before
- reading the startup files.
-
-e. Fixed a problem with the default operation of the `umask' builtin.
-
-2. Changes to Readline
-
-a. Fixed a problem with readline saving the contents of the current line
- before beginning a non-interactive search.
-
-b. Fixed a problem with EOF detection when using rl_event_hook.
-
-c. Fixed a problem with the vi mode `p' and `P' commands ignoring numeric
- arguments.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.0-rc1,
-and the previous version, bash-3.0-beta1.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused incorrect behavior when referecing element 0 of
- an array using $array, element 0 was unset, and `set -u' was enabled.
-
-b. System-specific changes for: SCO Unix 3.2, Tandem.
-
-c. Fixed a bug that caused inappropriate word splitting when a variable was
- expanded within a double-quoted string that also included $@.
-
-d. Fixed a bug that caused `pwd' to not display anything in physical mode
- when the file system had changed underneath the shell.
-
-e. Fixed a bug in the pre- and post- increment and decrement parsing in the
- expression evaluator that caused errors when the operands and corresponding
- operators were separated by whitespace.
-
-f. Fixed a bug that caused `history -p' to add an entry to the history list,
- counter to the documentation. (Keeps the history expansions invoked by
- emacs-mode command line editing from doing that as well.)
-
-g. Fixed a bug that could cause a core dump if `cd' is asked to print out a
- pathname longer than PATH_MAX characters.
-
-h. Fixed a bug that caused jobs to be put into the wrong process group under
- some circumstances after enabling job control with `set -m'.
-
-i. `unalias' now returns failure if no alias name arguments are supplied.
-
-j. Documented the characters not allowed to appear in an alias name.
-
-k. $* is no longer expanded as if in double quotes when it appears in the
- body of a here document, as the SUS seems to require.
-
-l. The `bashbug' script now uses a directory in $TMPDIR for exclusive
- access rather than trying to guess how the underlying OS provides for
- secure temporary file creation.
-
-m. Fixed a few problems with `cd' and `pwd' when asked to operate on pathnames
- longer than PATH_MAX characters.
-
-n. Fixed a memory leak caused when creating multiple local array variables
- with identical names.
-
-o. Fixed a problem with calls to getcwd() so that bash now operates better
- when the full pathname to the current directory is longer than PATH_MAX
- bytes.
-
-p. The `trap' builtin now reports an error if a single non-signal argument
- is specified.
-
-q. Fixed a bug that caused `umask' to not work correctly when presented
- with a mask of all 0s.
-
-r. When `getopts' reaches the end of options, OPTARG is unset, as POSIX
- appears to specify.
-
-s. Interactive mode now depends on whether or not stdin and stderr are
- connected to a tty; formerly it was stdin and stdout. POSIX requires
- this.
-
-t. Fixed vi-mode completion to work more as POSIX specifies (e.g., doing the
- right kind of filename generation).
-
-2. Changes to Readline
-
-a. Fixed a problem that could cause readline to refer to freed memory when
- moving between history lines while doing searches.
-
-b. Improvements to the code that expands and displays prompt strings
- containing multibyte characters.
-
-c. Fixed a problem with vi-mode not correctly remembering the numeric argument
- to the last `c'hange command for later use with `.'.
-
-d. Fixed a bug in vi-mode that caused multi-digit count arguments to work
- incorrectly.
-
-e. Fixed a problem in vi-mode that caused the last text modification command
- to not be remembered across different command lines.
-
-f. Fixed problems with changing characters and changing case at the end of
- the line.
-
-3. New Features in Bash
-
-a. The `jobs', `kill', and `wait' builtins now accept job control notation
- even if job control is not enabled.
-
-b. The historical behavior of `trap' that allows a missing `action' argument
- to cause each specified signal's handling to be reset to its default is
- now only supported when `trap' is given a single non-option argument.
-
-4. New Features in Readline
-
-a. When listing completions, directories have a `/' appended if the
- `mark-directories' option has been enabled.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.0-beta1,
-and the previous version, bash-3.0-alpha.
-
-1. Changes to Bash
-
-a. Fixes to build correctly when arrays are not compiled into the shell.
-
-b. Fixed command substitution to run any exit trap defined in the command
- substitution before returning; the exit trap is not inherited from the
- calling shell.
-
-c. Fixes to process group synchronization code so that every child process
- attempts to set the terminal's process group; fixes some synchronization
- problems on Linux kernels that schedule the child to always run before
- the parent.
-
-d. Fixed processing of octal and hex constants in printf builtin for POSIX.2
- compliance.
-
-e. Fixed a couple of core dumps in the pattern removal code.
-
-f. Fixes to the array subrange extraction code to deal better with sparse
- arrays.
-
-g. Parser errors and other errors that result in the shell exiting now cause
- the exit trap to be run.
-
-h. Change the command substitution completion functions to not append any
- closing quote, because it would be inserted a closing "`" or ")".
-
-i. Fix history initialization so assignments to $histchars made in startup
- files are honored.
-
-j. If an exit trap does not contain a call to `exit', the shell now uses
- the exit status of the last command executed before the trap as the exit
- status of the shell.
-
-k. The parser now prompts with $PS2 if it reads a newline while parsing a
- compound array assignment statement.
-
-l. When performing a compound array assignment, the parser doesn't treat
- words of the form [index]=value as assignments if they're the result of
- expansions.
-
-m. Fixed a bug that caused `return' executed in a trap command to make the
- shell think it was still running the trap.
-
-n. Fixed the value of errno set by the pathname canonicalization functions.
-
-o. Changed the grammar so that `time' alone on a line times a null command
- rather than being a syntax error.
-
-p. The pattern substitution code no longer performs quote removal on the
- pattern before trying to match it, as the pattern removal functions do.
-
-q. Fixed a bug that could cause core dumps when checking whether a quoted
- command name was being completed.
-
-r. Fixes to the pattern removal and pattern replacement expansions to deal
- with multibyte characters better (and faster).
-
-s. Fix to the substring expansion (${param:off[:len]}) to deal with (possibly
- multibyte) characters instead of raw bytes.
-
-t. Fixed a bug that caused some key bindings set in an inputrc to be ignored
- at shell startup.
-
-u. Fixed a bug that caused unsetting a local variable within a function to
- not work correctly.
-
-v. Fixed a bug that caused invalid variables to be created when using
- `read -a'.
-
-w. Fixed a bug that caused "$@" to expand incorrectly when used as the right
- hand side of a parameter expansion such as ${word:="$@"} if the first
- character of $IFS was not a space.
-
-x. Fixed a slight cosmetic problem when printing commands containing a
- `>&word' redirection.
-
-y. Fixed a problem that could cause here documents to not be created correctly
- if the system temporary directory did not allow writing.
-
-2. Changes to Readline
-
-a. Change to history expansion functions to treat `^' as equivalent to word
- one, as the documention states.
-
-b. Some changes to the display code to improve display and redisplay of
- multibyte characters.
-
-c. Changes to speed up the multibyte character redisplay code.
-
-d. Fixed a bug in the vi-mode `E' command that caused it to skip over the
- last character of a word if invoked while point was on the word's
- next-to-last character.
-
-e. Fixed a bug that could cause incorrect filename quoting when
- case-insensitive completion was enabled and the word being completed
- contained backslashes quoting word break characters.
-
-f. Fixed a bug in redisplay triggered when the prompt string contains
- invisible characters.
-
-g. Fixed some display (and other) bugs encountered in multibyte locales
- when a non-ascii character was the last character on a line.
-
-h. Fixed some display bugs caused by multibyte characters in prompt strings.
-
-i. Fixed a problem with history expansion caused by non-whitespace characters
- used as history word delimiters.
-
-3. New Features in Bash
-
-a. printf builtin understands two new escape sequences: \" and \?.
-
-b. `echo -e' understands two new escape sequences: \" and \?.
-
-c. The GNU `gettext' package and libintl have been integrated; the shell's
- messages can be translated into different languages.
-
-d. The `\W' prompt expansion now abbreviates $HOME as `~', like `\w'.
-
-e. The error message printed when bash cannot open a shell script supplied
- as argument 1 now includes the name of the shell, to better identify
- the error as coming from bash.
-
-4. New Features in Readline
-
-a. New application variable, rl_completion_quote_character, set to any
- quote character readline finds before it calls the application completion
- function.
-
-b. New application variable, rl_completion_suppress_quote, settable by an
- application completion function. If set to non-zero, readline does not
- attempt to append a closing quote to a completed word.
-
-c. New application variable, rl_completion_found_quote, set to a non-zero
- value if readline determines that the word to be completed is quoted.
- Set before readline calls any application completion function.
-
-d. New function hook, rl_completion_word_break_hook, called when readline
- needs to break a line into words when completion is attempted. Allows
- the word break characters to vary based on position in the line.
-
-e. New bindable command: unix-filename-rubout. Does the same thing as
- unix-word-rubout, but adds `/' to the set of word delimiters.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-3.0-alpha,
-and the previous version, bash-2.05b-release.
-
-1. Changes to Bash
-
-a. Fixes so that the shell will compile without some of the default options
- defined.
-
-b. Fixed an error message that did not pass enough arguments to printf.
-
-c. Fixed a bug that caused input redirection to a builtin inside a script
- being read from standard input to result in the rest of the already-
- read and buffered script to be discarded.
-
-d. Fixed a bug that caused subshell initialization to close the file
- descriptor from which the shell was reading a script under certain
- circumstances.
-
-e. Fixed a bug that caused the shell to not advance a string pointer over
- a null wide character when doing string operations.
-
-f. Fixed the internal logout code so that shells that time out waiting for
- input (using $TMOUT) run ~/.bash_logout.
-
-g. Portability and configuration changes for: cygwin, HP/UX, GNU/FreeBSD.
-
-h. The parser no longer adds implicit double quotes to ((...)) arithmetic
- commands.
-
-i. The ((...)) arithmetic command evaluation code was fixed to not dump core
- when the expanded string is null.
-
-j. The ((...)) arithmetic command evaluation code was fixed to not perform
- variable assignments while expanding the expression.
-
-k. Fixed a bug that caused word splitting to be performed incorrectly when
- IFS is set, but null.
-
-l. Fixed a bug in brace expansion that caused a quoted `$' preceding an
- open brace to inhibit brace expansion.
-
-m. Fixed a bug that caused a leading `-' in the shell's name to cause it to
- not be recognized as a restricted shell.
-
-n. Fixed a bug in the arithmetic evaluation code that could cause longjmps
- to an invalid location and result in a core dump.
-
-o. Fixed a bug in the calculation of how many history lines are new in a
- single shell session when reading new history lines from a file with
- `history -n'.
-
-p. Fixed a bug in pathname canonicalization that caused the shell to dump
- core when presented with a pathname longer than PATH_MAX.
-
-q. Fixed the parser so that it doesn't try to compare a char variable to
- EOF, which fails when chars are unsigned.
-
-r. Fixed a bug in the simple command execution code that caused occasional
- core dumps.
-
-s. The shell does a better job of saving any partial parsing state during
- operations which cause a command to be executed while a line is being
- entered and parsed.
-
-t. The completion code now splits words more like the expansion code when
- $IFS is used to split.
-
-u. The locale code does a better job of recomputing the various locale
- variable values when LC_ALL is unset.
-
-v. The programmable completion code does a better job of dequoting expanded
- word lists before comparing them against the word to be matched.
-
-w. The shell no longer seg faults if the expanded value of $PS4 is null
- and `set -x' is enabled.
-
-x. Fixed a bug that caused core dumps when a here string expanded to NULL.
-
-y. The mail checking code now makes sure the mailbox is bigger before
- reporting the existence of new mail.
-
-z. The parser does not try to expand $'...' and $"..." when the appear
- within double quotes unless the `extquote' option has been enabled with
- `shopt'. For backwards compatibility, it is enabled by default.
-
-aa. Fixed a bug that caused `for x; do ...' and `select x; do ... to use
- $@ instead of "$@" for the implicit list of arguments.
-
-bb. Fixed a bug that caused a subshell of a restricted shell (e.g., one
- spawned to execute a pipeline) to not exit immediately if attempting
- to use a command containing a slash.
-
-cc. Fixed a problem with empty replacements for a pattern that doesn't match
- when performing ${param/word/} expansion.
-
-dd. Word expansions performed while expanding redirections no longer search
- a command's temporary environment to expand variable values.
-
-ee. Improvements to the alias expansion code when expanding subsequent words
- because an aliase's value ends with a space.
-
-ff. `cd -' now prints the current working directory after a successful chdir
- even when the shell is not interactive, as the standard requires.
-
-gg. The shell does a better job of ensuring a child process dies of SIGINT
- before resending SIGINT to itself.
-
-hh. The arithmetic expansion variable assignment code now does the right
- thing when assigning to `special' variables like OPTIND.
-
-ii. When history expansion verification is enabled, the bash readline helper
- functions that do history expansion on the current line don't print
- the results.
-
-jj. Fixed bugs with multiple consecutive alias expansion when one of the
- expansions ends with a space.
-
-kk. Fixed a problem in the programmable completion code that could cause core
- dumps when trying to initialize a set of possible completions from a
- list of variables.
-
-ll. The \[ and \] escape characters are now ignored when decoding the prompt
- string if the shell is started with editing disabled.
-
-mm. Fixed a bug that could leave extra characters in a string when doing
- quoted null character removal.
-
-nn. Command substitution and other subshell operations no longer reset the
- line number (aids the bash debugger).
-
-oo. Better line number management when executing simple commands, conditional
- commands, for commands, and select commands.
-
-pp. The globbing code now uses malloc, with its better failure properties,
- rather than alloca().
-
-qq. Fixed a bug that caused expansions like #{a[2]:=value} to create the
- appropriate array element instead of a variable named `a[2]'.
-
-rr. Fixed a bug in the handling of a `?(...)' pattern immediately following
- a `*' when extglob is enabled.
-
-ss. Fixed a bug that caused a `return' invoked in an exit trap when exit is
- invoked in a function to misbehave.
-
-tt. Fixed a bug that caused CTLESC and CTLNUL characters to not be escaped
- by the internal shell string quoting functions.
-
-uu. Fixed a bug that caused quoted null characters in an expanded word list
- to be inappropriately assigned to an array variable when using `read -a'.
-
-vv. Fixed a bug that caused redirections accompanying a null command to persist
- in the current shell.
-
-ww. Fixed a bug that caused the prompt to be printed when the shell was
- expanding a multiline alias.
-
-xx. Fixed a bug that resulted in core dumps when the completion for a command
- changed the compspec.
-
-yy. Fixed a bug that caused evaluation of programmable completions to print
- notifications of completed jobs.
-
-zz. Bash now disables line editing when $EMACS == `t' and $TERM == `dumb'
- (which is what emacs shell windows do).
-
-aaa. In posix mode, `kill -l' causes signal names to be displayed without
- a leading `SIG'.
-
-bbb. Clear error flag on standard output so it doesn't persist across multiple
- builtin commands.
-
-ccc. In posix mode, `alias' displays alias values without the leading `alias',
- so the output cannot be used as subsequent input.
-
-ddd. In posix mode, the `trap' builtin doesn't check whether or not its
- first argument is a signal specification and revert the signal handling
- to its original disposition if it is.
-
-eee. Fixed several bugs in the handling of "$*" and "${array[*]}" by the
- pattern substitution and removal expansions.
-
-fff. Fixed several problems with the handling of ${array[@]}, ${array[*]},
- $@, and $* by the indirect variable expansion code.
-
-ggg. Fixed a bug that did not allow `time' to be aliased.
-
-hhh. Improved the mail checking code so it won't check (and possibly cause an
- NFS file system mount) until MAILPATH or MAIL is given a value -- there
- is no default if DEFAULT_MAIL_DIRECTORY is not defined at compile time.
- (It is computed by configure, but can be #undef'd in config-bot.h.)
-
-iii. If the `chkwinsize' option is enabled, the shell checks for window size
- changes if a child process exits due to a signal.
-
-jjj. Removed the attempts to avoid adding a slash at the end of a completed
- executable name if there was a directory with the same name in the
- current directory.
-
-kkk. Fixed PATH lookup code so it treats the permission bits separately for
- owner, group, and other, rather than checking them all.
-
-lll. Fixed the locale code to reset the parser's idea of the character class
- <blank>, which controls how it splits tokens, when the locale changes.
-
-mmm. The shell now binds its special readline functions and key bindings only
- if the user's inputrc file has not already bound them.
-
-nnn. The shell now reports on processes that dump core due to signals when
- invoked as `-c command'.
-
-2. Changes to Readline
-
-a. Fixes to avoid core dumps because of null pointer references in the
- multibyte character code.
-
-b. Fix to avoid infinite recursion caused by certain key combinations.
-
-c. Fixed a bug that caused the vi-mode `last command' to be set incorrectly.
-
-d. Readline no longer tries to read ahead more than one line of input, even
- when more is available.
-
-e. Fixed the code that adjusts the point to not mishandle null wide
- characters.
-
-f. Fixed a bug in the history expansion `g' modifier that caused it to skip
- every other match.
-
-g. Fixed a bug that caused the prompt to overwrite previous output when the
- output doesn't contain a newline and the locale supports multibyte
- characters. This same change fixes the problem of readline redisplay
- slowing down dramatically as the line gets longer in multibyte locales.
-
-h. History traversal with arrow keys in vi insertion mode causes the cursor
- to be placed at the end of the new line, like in emacs mode.
-
-i. The locale initialization code does a better job of using the right
- precedence and defaulting when checking the appropriate environment
- variables.
-
-j. Fixed the history word tokenizer to handle <( and >( better when used as
- part of bash.
-
-k. The overwrite mode code received several bug fixes to improve undo.
-
-l. Many speedups to the multibyte character redisplay code.
-
-m. The callback character reading interface should not hang waiting to read
- keyboard input.
-
-n. Fixed a bug with redoing vi-mode `s' command.
-
-o. The code that initializes the terminal tracks changes made to the terminal
- special characters with stty(1) (or equivalent), so that these changes
- are reflected in the readline bindings. New application-callable function
- to make it work: rl_tty_unset_default_bindings().
-
-p. Fixed a bug that could cause garbage to be inserted in the buffer when
- changing character case in vi mode when using a multibyte locale.
-
-q. Fixed a bug in the redisplay code that caused problems on systems
- supporting multibyte characters when moving between history lines when the
- new line has more glyphs but fewer bytes.
-
-r. Undo and redo now work better after exiting vi insertion mode.
-
-s. Make sure system calls are restarted after a SIGWINCH is received using
- SA_RESTART.
-
-t. Improvements to the code that displays possible completions when using
- multibyte characters.
-
-u. Fixed a problem when parsing nested if statements in inputrc files.
-
-v. The completer now takes multibyte characters into account when looking for
- quoted substrings on which to perform completion.
-
-w. The history search functions now perform better bounds checking on the
- history list.
-
-3. New Features in Bash
-
-a. ANSI string expansion now implements the \x{hexdigits} escape.
-
-b. There is a new loadable `strftime' builtin.
-
-c. New variable, COMP_WORDBREAKS, which controls the readline completer's
- idea of word break characters.
-
-d. The `type' builtin no longer reports on aliases unless alias expansion
- will actually be performed.
-
-e. HISTCONTROL is now a colon-separated list of values, which permits
- more extensibility and backwards compatibility.
-
-f. HISTCONTROL may now include the `erasedups' option, which causes all lines
- matching a line being added to be removed from the history list.
-
-g. `configure' has a new `--enable-multibyte' argument that permits multibyte
- character support to be disabled even on systems that support it.
-
-h. New variables to support the bash debugger: BASH_ARGC, BASH_ARGV,
- BASH_SOURCE, BASH_LINENO, BASH_SUBSHELL, BASH_EXECUTION_STRING,
- BASH_COMMAND
-
-i. FUNCNAME has been changed to support the debugger: it's now an array
- variable.
-
-j. for, case, select, arithmetic commands now keep line number information
- for the debugger.
-
-k. There is a new `RETURN' trap executed when a function or sourced script
- returns (not inherited child processes; inherited by command substitution
- if function tracing is enabled and the debugger is active).
-
-l. New invocation option: --debugger. Enables debugging and turns on new
- `extdebug' shell option.
-
-m. New `functrace' and `errtrace' options to `set -o' cause DEBUG and ERR
- traps, respectively, to be inherited by shell functions. Equivalent to
- `set -T' and `set -E' respectively. The `functrace' option also controls
- whether or not the DEBUG trap is inherited by sourced scripts.
-
-n. The DEBUG trap is run before binding the variable and running the action
- list in a `for' command, binding the selection variable and running the
- query in a `select' command, and before attempting a match in a `case'
- command.
-
-o. New `--enable-debugger' option to `configure' to compile in the debugger
- support code.
-
-p. `declare -F' now prints out extra line number and source file information
- if the `extdebug' option is set.
-
-q. If `extdebug' is enabled, a non-zero return value from a DEBUG trap causes
- the next command to be skipped, and a return value of 2 while in a
- function or sourced script forces a `return'.
-
-r. New `caller' builtin to provide a call stack for the bash debugger.
-
-s. The DEBUG trap is run just before the first command in a function body is
- executed, for the debugger.
-
-t. `for', `select', and `case' command heads are printed when `set -x' is
- enabled.
-
-u. There is a new {x..y} brace expansion, which is shorthand for {x.x+1,
- x+2,...,y}. x and y can be integers or single characters; the sequence
- may ascend or descend; the increment is always 1.
-
-v. New ksh93-like ${!array[@]} expansion, expands to all the keys (indices)
- of array.
-
-w. New `force_fignore' shopt option; if enabled, suffixes specified by
- FIGNORE cause words to be ignored when performing word completion even
- if they're the only possibilities.
-
-x. New `gnu_errfmt' shopt option; if enabled, error messages follow the `gnu
- style' (filename:lineno:message) format.
-
-y. New `-o bashdefault' option to complete and compgen; if set, causes the
- whole set of bash completions to be performed if the compspec doesn't
- result in a match.
-
-z. New `-o plusdirs' option to complete and compgen; if set, causes directory
- name completion to be performed and the results added to the rest of the
- possible completions.
-
-aa. `kill' is available as a builtin even when the shell is built without
- job control.
-
-bb. New HISTTIMEFORMAT variable; value is a format string to pass to
- strftime(3). If set and not null, the `history' builtin prints out
- timestamp information according to the specified format when displaying
- history entries. If set, bash tells the history library to write out
- timestamp information when the history file is written.
-
-cc. The [[ ... ]] command has a new binary `=~' operator that performs
- extended regular expression (egrep-like) matching.
-
-dd. `configure' has a new `--enable-cond-regexp' option (enabled by default)
- to enable the =~ operator and regexp matching in [[ ... ]].
-
-ee. Subexpressions matched by the =~ operator are placed in the new
- BASH_REMATCH array variable.
-
-ff. New `failglob' option that causes an expansion error when pathname
- expansion fails to produce a match.
-
-gg. New `set -o pipefail' option that causes a pipeline to return a failure
- status if any of the processes in the pipeline fail, not just the last
- one.
-
-4. New Features in Readline
-
-a. History expansion has a new `a' modifier equivalent to the `g' modifier
- for compatibility with the BSD csh.
-
-b. History expansion has a new `G' modifier equivalent to the BSD csh `g'
- modifier, which performs a substitution once per word.
-
-c. All non-incremental search operations may now undo the operation of
- replacing the current line with the history line.
-
-d. The text inserted by an `a' command in vi mode can be reinserted with
- `.'.
-
-e. New bindable variable, `show-all-if-unmodified'. If set, the readline
- completer will list possible completions immediately if there is more
- than one completion and partial completion cannot be performed.
-
-f. There is a new application-callable `free_history_entry()' function.
-
-g. History list entries now contain timestamp information; the history file
- functions know how to read and write timestamp information associated
- with each entry.
-
-h. Four new key binding functions have been added:
-
- rl_bind_key_if_unbound()
- rl_bind_key_if_unbound_in_map()
- rl_bind_keyseq_if_unbound()
- rl_bind_keyseq_if_unbound_in_map()
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05b-release,
-and the previous version, bash-2.05b-beta2.
-
-1. Changes to Bash
-
-a. Fixed an off-by-one error in the function that translates job
- specifications.
-
-b. Note that we're running under Emacs and disable line editing if
- $EMACS == `t'.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05b-beta2,
-and the previous version, bash-2.05b-beta1.
-
-1. Changes to Bash
-
-a. Fixed the /= and %= arithmetic operators to catch division by zero.
-
-b. Added putenv, setenv, unsetenv to getenv replacement for completeness.
-
-c. Fixed a bug that could cause the -O expand_aliases invocation option
- to not take effect.
-
-d. Fixed a problem with process substitution that resulted in incorrect
- behavior when the number of process substitutions in an individual
- command approached 64.
-
-2. Changes to Readline
-
-a. Fixed a problem with backward-char-search when on a system with support
- for multibyte characters when running in a locale without any multibyte
- characters.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05b-beta1,
-and the previous version, bash-2.05b-alpha1.
-
-1. Changes to Bash
-
-a. Fixed a problem when parsing a POSIX.2 character class name while
- evaluating a bracket expression containing multibyte characters.
-
-b. Changed the help text for `bind' to make it clear that any command
- that may be placed in ~/.inputrc is a valid argument to `bind'.
-
-c. Added `help' builtin entries for `((', `[[', and arithmetic for.
-
-d. malloc updated again:
- o slightly better overflow and underflow detection by putting the
- chunk size at the beginning and end of the chunk and making
- sure they match in free/realloc
- o partial page allocated to make things page-aligned no longer
- completely wasted
- o block coalescing now enabled by default
- o splitting and coalescing enabled for 32-byte chunks, the most
- common size requested
- o fixed a problem that resulted in spurious underflow messages and
- aborts
- o bin sizes are precomputed and stored in an array rather than
- being computed at run time
- o malloc will return memory blocks back to the system if the block
- being freed is at the top of the heap and of sufficient size to
- make it worthwhile
- o malloc/free/realloc now inline memset instead of calling the
- libc function; uses Duff's device for good performance
-
-e. Check for getservent(); make the service name completion code dependent
- on its presence.
-
-f. Changed the readline callback that executes a command bound to a key
- sequence to not save the executed command on the history list and to
- save and restore the parsing state.
-
-g. Changes to lib/sh/snprintf.c: fixed some bugs in the `g' and `G'
- floating point format display; implemented the "'" flag character
- that turns on thousands' grouping; fixed behavior on systems where
- MB_CUR_MAX does not evaluate to a constant.
-
-h. The `unset' builtin no longer returns a failure status when asked to
- unset a previously-unset variable or function.
-
-i. Changes to the build system to make it easier to cross-compile bash
- for different systems.
-
-j. Added `,' to the characters that are backslash-escaped during filename
- completion, to avoid problems with complete-into-braces and RCS filenames
- containing commas.
-
-k. Some changes to the multibyte character support code to avoid many calls
- to strlen().
-
-l. Bash now correctly honors setting LANG to some value when LC_ALL does not
- already have a value.
-
-m. Fixed a bug that could cause SIGSEGV when processing nested traps with
- trap handlers.
-
-n. The `source/.' builtin now restores the positional parameters when it
- returns unless they were changed using the `set' builtin during the file's
- execution.
-
-o. Fixed a bug that caused a syntax error when a command was terminated by
- EOF.
-
-2. New Features in Bash
-
-a. There is now support for placing the long help text into separate files
- installed into ${datadir}/bash. Not enabled by default; can be turned
- on with `--enable-separate-helpfiles' option to configure.
-
-b. All builtins that take operands accept a `--' pseudo-option, except
- `echo'.
-
-c. The `echo' builtin now accepts \0xxx (zero to three octal digits following
- the `0') in addition to \xxx (one to three octal digits) for SUSv3/XPG6/
- POSIX.1-2001 compliance.
-
-3. Changes to Readline
-
-a. Fixed a small problem in _rl_insert_char with multibyte characters.
-
-b. Fixes from IBM for line wrapping problems when using multibyte characters.
-
-c. Fixed a problem which caused the display to be messed up when the last
- line of a multi-line prompt (possibly containing invisible characters)
- was longer than the screen width.
-
-d. Fixed a problem with the vi-mode `r' command that ocurred on systems with
- support for multibyte characters when running in a locale without any
- multibyte characters.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05b-alpha1,
-and the previous version, bash-2.05a-release.
-
-1. Changes to Bash
-
-a. Some changes to work around inlining differences between compilers.
-
-b. Added more prototypes for internal shell typedefs, to catch argument
- passing errors when using pointers to functions.
-
-c. The `cd' builtin now fails in posix mode when a valid directory cannot be
- constructed from a relative pathname argument and the $PWD using pathname
- canonicalization, and the -P option has not been supplied. Previously,
- the shell would attempt to use what the user typed, leading to weird
- values for $PWD and discrepancies between the value of $PWD and the
- actual working directory.
-
-d. The `cd' builtin now resets $PWD when canonicalization fails but a chdir
- to the pathname passed as an argument succeeds (when not in posix mode).
-
-e. The `fc' builtin has been fixed, as POSIX requires, to use the closest
- history position in range when given an out-of-range argument.
-
-f. The history file loading code was changed to allow lines to be saved in
- the history list from the shell startup files.
-
-g. `history -s args' now works better in compound commands.
-
-h. The tilde expansion code was fixed to better recognize when it's being
- invoked in an assignment context, which enables expansion after `='
- and `:'.
-
-i. Fixed the command name completion code so a slash is no longer appended
- to a single match if there happens to be a directory with that name in
- $PWD.
-
-j. Fixed compound array assignment to no longer perform alias expansion, to
- allow reserved words as array members, and to not produce extra output
- when the `-v' option had been enabled.
-
-k. Fixed the programmable completion code to better handle newlines in lists
- of possible completions (e.g., `complete -W').
-
-l. Removed the reserved words from the `bash-builtins' manual page.
-
-m. Parser error reporting now attempts to do a better job of identifying the
- token in error rather than doing straight textual analysis.
-
-n. Fixes for Inf/NaN, locales, wide/multibyte characters and zero-length
- arguments in the library snprintf(3) replacement.
-
-o. `read -e' no longer does command name completion on the first word on
- the line being read.
-
-p. `select' now returns failure if the read of the user's selection fails.
-
-q. Fixed a bug that could cause a core dump when setting $PIPESTATUS.
-
-r. Fixes to not allocate so many job slots when the shell is running a loop
- with job control enabled in a subshell of an interactive shell.
-
-s. Fixed a bug in the trap code that caused traps to be inherited by
- command substitutions in some cases.
-
-t. Fixed a bug that could cause alias expansion to inappropriately expand
- the word following the alias.
-
-u. Fixed a bug in the `kill' builtin that mishandled negative pid arguments.
-
-v. The parser is less lenient when parsing assignment statements where the
- characters before the `=' don't comprise a valid identifier.
-
-w. The arithmetic expression evaluation code now honors the setting of the
- `-u' option when expanding variable names.
-
-x. Fixed the arithmetic evaluation code to allow array subscripts to be
- assigned (`let b[7]=42') and auto-incremented and auto-decremented
- (e.g., b[7]++).
-
-y. Reimplemented the existing prompt string date and time expansions using
- strftime(3), which changed the output of \@ in some locales.
-
-z. Fixed a bug that could cause a core dump when a special shell variable
- (like RANDOM) was converted to an array with a variable assignment.
-
-aa. Fixed a bug that would reset the handler for a signal the user had
- trapped to a function that would exit the shell when setting the exit
- trap in a non-interactive shell.
-
-bb. Changed the execve(2) wrapper code to check whether or not a failing
- command is a directory before looking at whether a `#!' interpreter
- failed for some reason.
-
-cc. Fixed a bug in the command printing code so it no longer inserts a `;'
- after a newline, which produces a syntax error when reused as input.
-
-dd. The code that expands $PS4 no longer inherits the `-x' flag.
-
-ee. The bash-specific completion functions may now take advantage of the
- double-TAB and M-? features of the standard readline completion
- functions.
-
-ff. The mail checking code no longer prints a message if the checked file's
- size has not increased, even if the access time is less than the modification time.
-
-gg. Rewrote the variable symbol table code: there is now a stack of
- contexts, each possibly including a separate symbol table; there can
- be more than one temporary environment supplied to nested invocations
- of `./source'; the temporary environments no longer require so much
- special-case code; shell functions now handle the temporary environment
- and local variables more consistently; function scope exit is faster now
- that the entire symbol table does not have to be traversed to dispose of
- local variables; it is now easier to push vars from the temporary
- environment to the shell's variable table in posix mode; some duplicated
- code has been removed.
-
-hh. Regularized the error message printing code; builtin_error is now called
- more consistently, and common error message strings are handled by small
- functions. This should make eventual message translation easier.
-
-ii. Error messages now include the line number in a script when the shell
- is not interactive.
-
-jj. Array subscript expansion now takes place even when the array variable is
- unset, so side effects will take place.
-
-kk. Fixed a bug in the SICGHLD child-reaping code so that it won't find
- jobs already marked as terminated if the OS reuses pids quickly enough.
-
-ll. Fixed a bug that could cause a signal to not interrupt the `wait'
- builtin while it was waiting for a background process to terminate.
-
-mm. A couple of changes to make it easier for multiple shells to share history
- files using `history -n', `history -r', and `history -w'.
-
-nn. The `getopts' builtin always increments OPTIND to point to the next
- option to be handled when an option is returned, whether it's valid
- or not, as POSIX 1003.x-2001 requires.
-
-oo. Changed some parts of the expansion code to avoid allocating and
- immediately freeing memory without using the results for anything.
-
-pp. The shell now keeps track of $IFS internally, updating its internal map
- each time the variable is assigned a new value (or at local scope exit).
- This saves thousands of hash lookups for IFS, which, while individually
- cheap, add up.
-
-qq. Rewrote the hash table code: searching and insertion are much faster now,
- and it uses a better string hashing function; augmented the function
- interface to simplify other parts of the code and remove duplicated code
-
-rr. The shell now uses a simple, generic `object cache' for allocating and
- caching words and word lists, which were the major users of
- malloc/free.
-
-ss. Fixed the assignment statement parsing code to allow whitespace and
- newlines in subscripts when performing array element assignment.
-
-tt. The shell now issues many fewer calls to sigprocmask and other signal
- masking system calls.
-
-uu. Fixed the `test' and conditional command file comparison operators to
- work right when one file has a non-positive timestamp and the other
- does not exist.
-
-vv. Fixed some cases where the special characters '\001' and '\177' in the
- values of variables or positional parameters caused incorrect expansion
- results.
-
-2. Changes to Readline
-
-a. Fixed output of comment-begin character when listing variable values.
-
-b. Added some default key bindings for common escape sequences produced by
- HOME and END keys.
-
-c. Fixed the mark handling code to be more emacs-compatible.
-
-d. A bug was fixed in the code that prints possible completions to keep it
- from printing empty strings in certain circumstances.
-
-e. Change the key sequence printing code to print ESC as M\- if ESC is a
- meta-prefix character -- it's easier for users to understand than \e.
-
-f. Fixed unstifle_history() to return values that match the documentation.
-
-g. Fixed the event loop (rl_event_hook) to handle the case where the input
- file descriptor is invalidated.
-
-h. Fixed the prompt display code to work better when the application has a
- custom redisplay function.
-
-i. Changes to make reading and writing the history file a little faster, and
- to cope with huge history files without calling abort(3) from xmalloc.
-
-j. The vi-mode `S' and `s' commands are now undone correctly.
-
-3. New Features in Bash
-
-a. If set, TMOUT is the default timeout for the `read' builtin.
-
-b. `type' has two new options: `-f' suppresses shell function lookup, and
- `-P' forces a $PATH search.
-
-c. New code to handle multibyte characters.
-
-d. `select' was changed to be more ksh-compatible, in that the menu is
- reprinted each time through the loop only if REPLY is set to NULL.
- The previous behavior is available as a compile-time option.
-
-e. `complete -d' and `complete -o dirnames' now force a slash to be
- appended to names which are symlinks to directories.
-
-f. There is now a bindable edit-and-execute-command readline command,
- like the vi-mode `v' command, bound to C-xC-e in emacs mode.
-
-g. Added support for ksh93-like [:word:] character class in pattern matching.
-
-h. The $'...' quoting construct now expands \cX to Control-X.
-
-i. A new \D{...} prompt expansion; passes the `...' to strftime and inserts
- the result into the expanded prompt.
-
-j. The shell now performs arithmetic in the largest integer size the
- machine supports (intmax_t), instead of long.
-
-k. If a numeric argument is supplied to one of the bash globbing completion
- functions, a `*' is appended to the word before expansion is attempted.
-
-l. The bash globbing completion functions now allow completions to be listed
- with double tabs or if `show-all-if-ambiguous' is set.
-
-m. New `-o nospace' option for `complete' and `compgen' builtins; suppresses
- readline's appending a space to the completed word.
-
-n. New `here-string' redirection operator: <<< word.
-
-o. When displaying variables, function attributes and definitions are shown
- separately, allowing them to be re-used as input (attempting to re-use
- the old output would result in syntax errors).
-
-p. There is a new configuration option `--enable-mem-scramble', controls
- bash malloc behavior of writing garbage characters into memory at
- allocation and free time.
-
-q. The `complete' and `compgen' builtins now have a new `-s/-A service'
- option to complete on names from /etc/services.
-
-r. `read' has a new `-u fd' option to read from a specified file descriptor.
-
-s. Fix the completion code so that expansion errors in a directory name
- don't cause a longjmp back to the command loop.
-
-t. Fixed word completion inside command substitution to work a little more
- intuitively.
-
-u. The `printf' %q format specifier now uses $'...' quoting to print the
- argument if it contains non-printing characters.
-
-v. The `declare' and `typeset' builtins have a new `-t' option. When applied
- to functions, it causes the DEBUG trap to be inherited by the named
- function. Currently has no effect on variables.
-
-w. The DEBUG trap is now run *before* simple commands, ((...)) commands,
- [[...]] conditional commands, and for ((...)) loops.
-
-x. The expansion of $LINENO inside a shell function is only relative to the
- function start if the shell is interactive -- if the shell is running a
- script, $LINENO expands to the line number in the script. This is as
- POSIX-2001 requires.
-
-y. The bash debugger in examples/bashdb has been modified to work with the
- new DEBUG trap semantics, the command set has been made more gdb-like,
- and the changes to $LINENO make debugging functions work better. Code
- from Gary Vaughan.
-
-z. New [n]<&word- and [n]>&word- redirections from ksh93 -- move fds (dup
- and close).
-
-aa. There is a new `-l' invocation option, equivalent to `--login'.
-
-bb. The `hash' builtin has a new `-l' option to list contents in a reusable
- format, and a `-d' option to remove a name from the hash table.
-
-4. New Features in Readline
-
-a. Support for key `subsequences': allows, e.g., ESC and ESC-a to both
- be bound to readline functions. Now the arrow keys may be used in vi
- insert mode.
-
-b. When listing completions, and the number of lines displayed is more than
- the screen length, readline uses an internal pager to display the results.
- This is controlled by the `page-completions' variable (default on).
-
-c. New code to handle editing and displaying multibyte characters.
-
-d. The behavior introduced in bash-2.05a of deciding whether or not to
- append a slash to a completed name that is a symlink to a directory has
- been made optional, controlled by the `mark-symlinked-directories'
- variable (default is the 2.05a behavior).
-
-e. The `insert-comment' command now acts as a toggle if given a numeric
- argument: if the first characters on the line don't specify a
- comment, insert one; if they do, delete the comment text
-
-f. New application-settable completion variable:
- rl_completion_mark_symlink_dirs, allows an application's completion
- function to temporarily override the user's preference for appending
- slashes to names which are symlinks to directories.
-
-g. New function available to application completion functions:
- rl_completion_mode, to tell how the completion function was invoked
- and decide which argument to supply to rl_complete_internal (to list
- completions, etc.).
-
-h. Readline now has an overwrite mode, toggled by the `overwrite-mode'
- bindable command, which could be bound to `Insert'.
-
-i. New application-settable completion variable:
- rl_completion_suppress_append, inhibits appending of
- rl_completion_append_character to completed words.
-
-j. New key bindings when reading an incremental search string: ^W yanks
- the currently-matched word out of the current line into the search
- string; ^Y yanks the rest of the current line into the search string,
- DEL or ^H deletes characters from the search string.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05a-release,
-and the previous version, bash-2.05a-rc1.
-
-1. Changes to Bash
-
-a. Fixed the `printf' builtin so that the variable name supplied as an
- argument to a %n conversion must be a valid shell identifier.
-
-b. Improved the random number generator slightly.
-
-c. Changes to configuration to not put -I/usr/include into $CFLAGS, since
- it messes up some includes.
-
-d. Corrected description of POSIXLY_CORRECT in man page and info manual.
-
-e. Fixed a couple of cases of incorrect function prototypes that sneaked
- through and caused compilation problems.
-
-f. A few changes to avoid potential core dumps in the programmable completion
- code.
-
-g. Fixed a configure problem that could cause a non-existent file to show
- up in LIBOBJS.
-
-h. Fixed a configure problem that could cause siglist.o to not be built when
- required.
-
-i. Changes to the strtoimax and strtoumax replacement functions to work
- around buggy compilers.
-
-j. Fixed a problem with the snprintf replacement function that could
- potentially cause a core dump.
-
-2. Changes to Readline
-
-a. Fixed a locale-specific problem in the vi-mode `goto mark' command.
-
-b. Fixed Makefile to not put -I/usr/include into CFLAGS, since it can cause
- include file problems.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05a-rc1,
-and the previous version, bash-2.05a-beta1.
-
-1. Changes to Bash
-
-a. Fixed the snprintf replacement to correctly implement the `alternate form'
- of the %g and %G conversions.
-
-b. Fixed snprintf to correctly handle the optional precision with the %g and
- %G conversions.
-
-c. Fixed the arithmetic evaluation code to correct the values of `@' and `_'
- when translating base-64 constants (they were backwards).
-
-d. New library functions for formatting long and long long ints.
-
-e. Fixed a few places where negative array subscripts could have occurred,
- mostly as the result of systems using signed characters.
-
-f. Fixed a few places that assumed a pid_t was no wider than an int.
-
-g. Fixed the `maildir' mail checking code to work on systems where a
- `struct stat' doesn't include an `st_blocks' member.
-
-h. Fixed snprintf to make `unsigned long long' conversion formats (%llu)
- work better.
-
-i. Fixed snprintf to not print a sign when asked to do an unsigned conversion.
-
-j. Made configure changes to avoid compiling empty source files in lib/sh.
-
-k. New replacement functions (if necessary) for strtoull, strtoll, strtoimax,
- strtoumax.
-
-l. The `printf' builtin now handles the `ll' and `j' length modifiers
- directly, since they can affect the type and width of the argument
- passed to printf(3).
-
-m. Renamed a number of the bash-specific autoconf macros in aclocal.m4 to
- have more sytematic naming, with accompanying changes to configure.in.
-
-n. Fixed snprintf to handle long doubles and the %a/%A conversions by
- falling back to sprintf, as long as sprintf supports them.
-
-o. Fixed return value from vsnprintf/snprintf to be the number of characters
- that would have been printed, even if that number exceeds the buffer
- size passed as an argument.
-
-p. Bash no longer attempts to define its own versions of some ctype macros
- if they are implemented as functions in libc but not as macros in
- <ctype.h>.
-
-q. Changed the variable printing code (used by `set', `export', etc.) to
- not use the $'...' syntax when in posix mode, since that caused
- interoperability problems with other shells (most notably with autoconf).
- When not in posix mode, it uses $'...' if the string to be printed
- contains non-printing characters and regular single quotes otherwise.
-
-r. snprintf now recognizes the %F conversion.
-
-s. Fixed a bug that could cause the wrong status to be returned by a shell
- function when the shell is compiled without job control and a null
- command containing a command substutition was executed in the function.
-
-t. When in posix mode, the default value for MAILCHECK is 600.
-
-u. Bash only initializes FUNCNAME, GROUPS, and DIRSTACK as special variables
- if they're not in the initial environment.
-
-v. If SECONDS appears in the initial environment with a valid integer value,
- bash uses that as the starting value, as if an assignment had been
- performed.
-
-w. Bash no longer auto-exports HOME, PATH, SHELL, or TERM, even though it
- gives them default values if they don't appear in the initial environment.
-
-x. Bash no longer auto-exports HOSTNAME, HOSTTYPE, MACHTYPE, or OSTYPE,
- even if it assigns them default values.
-
-y. Bash no longer removes the export attribute from SSH_CLIENT or SSH2_CLIENT
- if they appear in the initial environment.
-
-z. Bash no longer attempts to discover if it's being run by sshd in order to
- run the startup files. If the SSH_SOURCE_BASHRC is uncommented in
- config-top.h it will attempt to do so as previously, but that's commented
- out in the distributed version.
-
-aa. Fixed a typo in the code that tests for LC_NUMERIC.
-
-bb. The POSIXLY_CORRECT shell variable and its effects are now documented.
-
-cc. Some changes to several of the support shell scripts included in the
- definitions to try to avoid race conditions and attacks.
-
-dd. Several changes to avoid warnings from `gcc -Wall'.
-
-ee. Fixed a problem with the `unset' builtin that could cause incorrect
- results if asked to unset a variable and an array subscript in the
- same command.
-
-ff. A few changes to the shell's temporary file creation code to avoid
- potential file descriptor leaks and to prefer the system's idea of
- the temporary directory to use.
-
-gg. Fixes to build with the C alloca in lib/malloc/alloca.c if the system
- requires it but the shell has been configured --without-bash-malloc.
-
-hh. Updated the documentation to note that only interactive shells resend
- SIGHUP to all jobs before exiting.
-
-ii. Fixes to only pass unquoted tilde words to tilde_expand, rather than
- rely on tilde_expand or getpwnam(3) to handle the quotes (MacOS 10.x
- will remove backslashes in any login name passed to getpwnam(3)).
-
-jj. Small change from Paul Eggert to make LINENO right in commands run with
- `bash -c'.
-
-2. New Features in Bash
-
-a. The `printf' builtin now handles the %a and %A conversions if they're
- implemented by printf(3).
-
-b. The `printf' builtin now handles the %F conversion (just about like %f).
-
-c. The `printf' builtin now handles the %n conversion like printf(3). The
- corresponding argument is the name of a shell variable to which the
- value is assigned.
-
-3. Changes to Readline
-
-a. Fixed a few places where negative array subscripts could have occurred.
-
-b. Fixed the vi-mode code to use a better method to determine the bounds of
- the array used to hold the marks.
-
-c. Fixed the defines in chardefs.h to work better when chars are signed.
-
-d. Fixed configure.in to use the new names for bash autoconf macros.
-
-e. Readline no longer attempts to define its own versions of some ctype
- macros if they are implemented as functions in libc but not as macros in
- <ctype.h>.
-
-f. Fixed a problem where rl_backward could possibly set point to before
- the beginning of the line.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05a-beta1,
-and the previous version, bash-2.05a-alpha1.
-
-1. Changes to Bash
-
-a. Fixed a bug in the evalution of arithmetic `for' statements when the
- expanded expression is NULL.
-
-b. Fixed an unassigned variable problem in the redirection printing code.
-
-c. Added more prototypes to extern function declarations in the header
- files and to static function declarations in C source files.
-
-d. Make sure called functions have a prototype in scope, to get the arguments
- and return values right instead of casting. Removed extern function
- declarations from C source files that were already included in header
- files.
-
-e. Changed some function arguments to use function typedefs in general.h so
- the prototypes can be checked. The only use of Function and VFunction
- now is for unwind-protects.
-
-f. More const changes to function arguments and appropriate variables.
-
-g. Changed the mail checking support to handle `maildir'-style mail
- directories.
-
-h. Augmented the bash malloc to pass in the file and line number information
- for each malloc, realloc, and free. This should result in better error
- messages.
-
-i. The `old' gnu malloc is no longer a configuration option.
-
-j. Augmented the bash malloc with optional tracing and registering allocated
- and freed memory.
-
-k. Prompt string decoding now saves and restores the value of $? when it
- expands the prompt string, so command substitutions don't change $?.
-
-i. Array indices are now `long', since shell arithmetic is performed as long,
- and the internal arrayind_t type is used consistently.
-
-j. Some more `unsigned char *' fixes from Paul Eggert.
-
-k. Fixed a bad call to builtin_error that could cause core dumps when making
- local variables.
-
-l. `return' may no longer be used to terminate a `select' command, for
- compatibility with ksh.
-
-m. Changed code that reads octal numbers to do a better job of detecting
- overflows.
-
-n. The time formatting code no longer uses absolute indices into a buffer,
- because the buffer size changes depending on the size of a `time_t'.
-
-o. `umask' now prints four digits when printing in octal mode, for
- compatibility with other shells.
-
-p. Lots of changes to the `printf' builtin from Paul Eggert: it handles `L'
- formats and long doubles better, and internal functions have been
- simpified where appropriate.
-
-q. Some `time_t' fixes for machines were a time_t is bigger than a long.
-
-r. Replaced some bash-specific autoconf macros with standard equivalents.
-
-s. Improvmed the code that constructs temporary filenames to make the
- generated names a bit more random.
-
-t. Added code that checks for ascii before calling any of the is* ctype
- functions.
-
-u. Changed some places where a `char' was used as an array subscript to use
- `unsigned char', since a `char' can be negative if it's signed by default.
-
-v. Lots of changes to the `ulimit' builtin from Paul Eggert to add support
- for the new POSIX-200x RLIM_SAVED_CUR and RLIM_SAVED_MAX values and
- simplify the code.
-
-w. `ulimit' now prints the description of a resource in any error message
- relating to fetching or setting that resource's limits.
-
-x. The `snprintf' replacement now computes maximum values at compile
- time rather than using huge constants for things like long long.
-
-y. Interactive shells now ignore `set -n'.
-
-z. Changed the malloc bookkeeping information so that it's now 8 bytes
- instead of 12 on most 32-bit machines (saving 4 bytes per allocation),
- restoring 8-byte alignment.
-
-aa. The malloc error reporting code now attempts to print the file and line
- number of the call that caused the error.
-
-bb. Changed the redirection error reporting code to catch EBADF errors and
- report the file descriptor number rather than the file being redirected
- to or from (e.g., things like `exec 4242<x' where 4242 is an out-of-range
- file descriptor).
-
-cc. `printf', `echo -e', and the $'...' code now process only two hex digits
- after a `\x' escape sequence for compatibility with other shells, and
- the documentation was changed to note that the octal and hex escape
- sequences result in an eight-bit value rather than strict ASCII.
-
-2. Changes to Readline
-
-a. The completion code now attempts to do a better job of preserving the
- case of the word the user typed if ignoring case in completions.
-
-b. Readline defaults to not echoing the input and lets the terminal
- initialization code enable echoing if there is a controlling terminal.
-
-c. The key binding code now processes only two hex digits after a `\x'
- escape sequence, and the documentation was changed to note that the
- octal and hex escape sequences result in an eight-bit value rather
- than strict ASCII.
-
-3. New Features in Bash
-
-a. The builtin `ulimit' now takes two new non-numeric arguments: `hard',
- meaning the current hard limit, and `soft', meaning the current soft
- limit, in addition to `unlimited'
-
-b. `ulimit' now prints the option letter associated with a particular
- resource when printing more than one limit.
-
-c. `ulimit' prints `hard' or `soft' when a value is not `unlimited' but is
- one of RLIM_SAVED_MAX or RLIM_SAVED_CUR, respectively.
-
-4. New Features in Readline
-
-a. New bindable variable `history-preserve-point'. If set, the history
- code attempts to place the user at the same location on each history
- line retrived with previous-history or next-history.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05a-alpha1,
-and the previous version, bash-2.05-release.
-
-1. Changes to Bash
-
-a. Better checks in the redirection code for write errors.
-
-b. bashbug now uses $TMPDIR, defaulting to /tmp, and uses mktemp(1) more
- portably.
-
-c. System-specific configuration changes for: Interix, OpenBSD, FreeBSD,
- MacOS X.
-
-d. Some more `const' cleanups through the code.
-
-e. Fixed a typo in the /dev/fd redirection code, better checks for valid
- numeric fds in /dev/fd.
-
-f. Fixed many parts of the shell to handle integer overflow more gracefully
- and to do more stringent checks for valid numbers.
-
-g. Fixed mksignames to include config.h.
-
-h. Fixed an uninitialized variable problem that could cause the shell to core
- dump when replacing characters in a string.
-
-i. New mechanism for updating the patch level when official patches are
- released (patchlevel.h).
-
-j. configure.in changed to no longer require external files _distribution and
- _patchlevel.
-
-k. Fixed non-interactive shell initialization problem when bash started as
- `bash -i filename'.
-
-l. Fixed printf builtin conversion error handling to be POSIX.2-conformant.
-
-m. autoconf-2.52 is now used to build configure; autoconf-2.50 or newer is
- required. Some of the bash-specific macros were removed, since they are
- now standard.
-
-n. Startup files and files read with source or `.' are no longer required to
- be regular files.
-
-o. Fixed core dump in builtin printf when user-supplied precision or field
- width is 0.
-
-p. Fixed builtin printf to treat a negative field width as a positive field
- width with left-justification.
-
-r. New unwind-protect implementation from Paul Eggert.
-
-s. Fixed an inadvertently-unclosed comment in the bash completion code that
- caused programmable completions to not add trailing slashes or spaces to
- completions.
-
-t. Fixed the process substitution code to cope better when stdin is closed.
-
-v. Fixes, mostly from Paul Eggert, for a few possible buffer overflows in
- the shell.
-
-w. Fixes from Paul Eggert to avoid most of the type casts in the shell code,
- and use more appropriate types for a number of variables.
-
-x. Command substition no longer inherits the DEBUG trap.
-
-y. Some fixes to the process substition code on machines without /dev/fd so
- that named pipes are not removed inappropriately.
-
-z. The loadable `getconf' builtin is now much more complete, and will become
- part of the shell in the future.
-
-aa. The select command no longer terminates on a `return', so it can be used
- to return from an enclosing function (as ksh does it).
-
-bb. Fixed the extended pattern matching code to behave better when presented
- with incorrectly-formed patterns.
-
-cc. Some changes were made with the intent of making cross-compilation easier.
-
-dd. The network code (/dev/tcp and /dev/udp redirections) uses getaddrinfo(3)
- if it's available, which adds support for IPv6.
-
-ee. Subshells of login shells no longer source ~/.bash_logout when they exit.
-
-ff. Fixes so that subshells don't exit inappropriately if the -e option has
- been set.
-
-gg. Restricted shells no longer allow functions to be exported.
-
-hh. Changes to the pattern matching code so extended pattern matching works
- on systems with deficient shared library implementations, like MacOS X.
-
-ii. Better error messages when a script with a leading `#!interp' fails
- to execute because of problems with `interp'.
-
-jj. Fixed `compgen' to handle the `-o default' option better.
-
-kk. Fixed the job control code to force an asynchronous process's standard
- input to /dev/null only if job control is not active.
-
-ll. Fixed a possible infinite recursion problem when `fc ""=abc' (a null
- pattern) is used to re-execute a previous command.
-
-mm. Fixed `declare [-a] var=value' to assign VALUE to element 0 if VAR is an
- array variable. Similarly for `declare [-a] var[N]=value'. This is like
- ksh93.
-
-nn. Fixed a bug that caused `read -a aname' to work even if ANAME had been
- declared readonly.
-
-oo. Fixed a possible integer overflow problem when constructing names for
- temporary files.
-
-2. New Features in Bash
-
-a. Added support for DESTDIR installation root prefix, so you can do a
- `make install DESTDIR=bash-root' and do easier binary packaging.
-
-b. Added support for builtin printf "'" flag character as per latest POSIX
- drafts.
-
-c. Support for POSIX.2 printf(1) length specifiers `j', `t', and `z' (from
- ISO C99).
-
-d. New autoconf macro, RL_LIB_READLINE_VERSION, for use by other applications
- (bash doesn't use very much of what it returns).
-
-e. `set [-+]o nolog' is recognized as required by the latest POSIX drafts,
- but ignored.
-
-f. New read-only `shopt' option: login_shell. Set to non-zero value if the
- shell is a login shell.
-
-g. New `\A' prompt string escape sequence; expands to time in 24 HH:MM format.
-
-h. New `-A group/-g' option to complete and compgen; does group name
- completion.
-
-i. New `-t' option to `hash' to list hash values for each filename argument.
-
-j. New [-+]O invocation option to set and unset `shopt' options at startup.
-
-k. configure's `--with-installed-readline' option now takes an optional
- `=PATH' suffix to set the root of the tree where readline is installed
- to PATH.
-
-l. The ksh-like `ERR' trap has been added. The `ERR' trap will be run
- whenever the shell would have exited if the -e option were enabled.
- It is not inherited by shell functions.
-
-m. `readonly', `export', and `declare' now print variables which have been
- given attributes but not set by assigning a value as just a command and
- a variable name (like `export foo') when listing, as the latest POSIX
- drafts require.
-
-n. `bashbug' now requires that the subject be changed from the default.
-
-o. configure has a new `--enable-largefile' option, like other GNU utilities.
-
-p. `for' loops now allow empty word lists after `in', like the latest POSIX
- drafts require.
-
-3. Changes to Readline
-
-a. More `const' and type casting fixes.
-
-b. Changed rl_message() to use vsnprintf(3) (if available) to fix buffer
- overflow problems.
-
-c. The completion code no longer appends a `/' or ` ' to a match when
- completing a symbolic link that resolves to a directory name, unless
- the match does not add anything to the word being completed. This
- means that a tab will complete the word up to the full name, but not
- add anything, and a subsequent tab will add a slash.
-
-d. Fixed a trivial typo that made the vi-mode `dT' command not work.
-
-e. Fixed the tty code so that ^S and ^Q can be inserted with rl_quoted_insert.
-
-f. Fixed the tty code so that ^V works more than once.
-
-g. Changed the use of __P((...)) for function prototypes to PARAMS((...))
- because the use of __P in typedefs conflicted g++ and glibc.
-
-4. New Features in Readline
-
-a. Added extern declaration for rl_get_termcap to readline.h, making it a
- public function (it was always there, just not in readline.h).
-
-b. New #defines in readline.h: RL_READLINE_VERSION, currently 0x0402,
- RL_VERSION_MAJOR, currently 4, and RL_VERSION_MINOR, currently 2.
-
-c. New readline variable: rl_readline_version, mirrors RL_READLINE_VERSION.
-
-d. New bindable boolean readline variable: match-hidden-files. Controls
- completion of files beginning with a `.' (on Unix). Enabled by default.
-
-e. The history expansion code now allows any character to terminate a
- `:first-' modifier, like csh.
-
-f. The incremental search code remembers the last search string and uses
- it if ^R^R is typed without a search string.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05-release,
-and the previous version, bash-2.05-beta2.
-
-1. Changes to Bash
-
-a. Make sure we note that the first line of a multi-line command was not
- saved in the history if the tests for HISTCONTROL succeed, but the
- HISTIGNORE check fails.
-
-b. Fixed a bug in the pattern matching code that caused `[' to be treated
- as a special character inside a `[...]' bracket expression.
-
-c. Fixed a bug in the pattern matching code that caused `]' to terminate
- a bracket expression even if it was the first character after the `['
- (or a leading `!' or `^').
-
-d. Made a small change to report a more user-friendly error message if
- execve(2) fails because of an error with the interpreter in a script
- with a leading `#! interpreter'.
-
-e. If the OS does not support an exec(2) magic number of `#!', make sure we
- have a non-null interpreter name before attempting to execute it.
-
-f. Fixed a bug that caused the shell process to end up in a different
- process group than the controlling terminal if a job-control shell was
- run with `exec' in the startup files.
-
-g. When started in POSIX mode, either by `bash --posix', `bash -o posix', or
- `sh', $SHELLOPTS includes `posix' and POSIXLY_CORRECT is set.
-
-h. Fixed a problem that caused the `\W' prompt string escape sequence to
- expand to nothing when $PWD was `//'.
-
-i. The `bashbug' shell script no longer uses $(...) command substitution.
-
-j. When `set' is invoked without options in POSIX mode, it no longer prints
- the names and definitions of shell functions.
-
-2. Changes to Readline
-
-a. rl_set_paren_blink_timeout() is now documented.
-
-b. Corrected history.3 man page: `$' is not in the default value of
- history_word_delimiters.
-
-c. If a hook function assigned to rl_event_hook sets rl_done to a non-zero
- value, rl_read_key() now immediately returns '\n' (which is assumed to
- be bound to accept-line).
-
-3. New Features in Bash
-
-a. The `>&word' redirection now works in POSIX mode as it does by default,
- since POSIX.2 leaves it unspecified.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05-beta2,
-and the previous version, bash-2.05-beta1.
-
-1. Changes to Bash
-
-a. Fixed a bug in the arithmetic evaluation code so that a^=b is supported.
-
-b. Fixed startup so posixly_correct is retained across subshells begun to
- execute scripts without a leading `#!'.
-
-c. Fixed a bug that caused $(< file) to not work in a (...) subshell.
-
-d. Added config support for Linux running on the IBM S390.
-
-e. Fixed a bug that caused bash to get its input pointer out of sync when
- reading commands through a pipe and running a command with standard
- input redirected from a file.
-
-f. Made a change so that command completion now makes about half as many
- stat(2) calls when searching the $PATH.
-
-g. Fixed a bug that caused variable assignments preceding `return' to not
- be propagated to the shell environment in POSIX mode.
-
-h. Fixed a bug with ${parameter[:]?word} -- tilde expansion was not performed
- on `word'.
-
-i. In POSIX mode, `break' and `continue' do not complain and return success
- if called when the shell is not executing a loop.
-
-j. Fixed `bash -o posix' to work the same as `bash --posix'.
-
-k. Fixed a bug where variable assignments preceding `eval' or `source/.'
- would not show up in the environment exported to subshells run by the
- commands.
-
-l. In POSIX mode, shells started to execute command substitutions inherit
- the value of the `-e' option from their parent shell.
-
-m. In POSIX mode, aliases are expanded even in non-interactive shells.
-
-n. Changed some of the job control messages to display the text required by
- POSIX.2 when the shell is in POSIX mode.
-
-o. Fixed a bug in `test' that caused it to occasionally return incorrect
- results when non-numeric arguments were supplied to `-t'.
-
-2. Changes to Readline
-
-a. Some changes were made to avoid gcc warnings with -Wall.
-
-b. rl_get_keymap_by_name now finds keymaps case-insensitively, so
- `set keymap EMACS' works.
-
-c. The history file writing and truncation functions now return a useful
- status on error.
-
-d. Fixed a bug that could cause applications to dereference a NULL pointer
- if a NULL second argument was passed to history_expand().
-
-3. New Features in Bash
-
-a. doc/readline.3 has been moved to the readline distribution.
-
-4. New Features in Readline
-
-a. New function, rl_get_screen_size (int *rows, int *columns), returns
- readline's idea of the screen dimensions.
-
-b. The timeout in rl_gather_tyi (readline keyboard input polling function)
- is now settable via a function (rl_set_keyboard_input_timeout()).
-
-c. Renamed the max_input_history variable to history_max_entries; the old
- variable is maintained for backwards compatibility.
-
-d. The list of characters that separate words for the history tokenizer is
- now settable with a variable: history_word_delimiters. The default
- value is as before.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05-beta1,
-and the previous version, bash-2.05-alpha1.
-
-1. Changes to Bash
-
-a. Changes to allow shared library and object building on the GNU Hurd.
-
-b. Fixes to the way exported functions are placed into the environment and
- cached.
-
-c. The globbing library once again respects locales when processing ranges
- in bracket expressions while doing pattern matching.
-
-d. System-specific configuration changes for: Tru 64, Interix
-
-e. Bashbug now uses /usr/bin/editor as one of the editing alternatives, and
- will use mktemp(1) or tempfile(1), if present, for temporary file creation.
-
-f. Bash no longer performs a binary file check on a script argument that's
- really a tty (like /dev/fd/0 or /dev/stdin).
-
-g. Fixed a bug in the execution of shell scripts that caused the effects of
- $BASH_ENV to be undone in some cases.
-
-h. Fixed several bugs that made `bash [-i] /dev/stdin' not work correctly.
-
-i. Several changes to the job control code to avoid some signal state
- manipulation.
-
-j. The Bash malloc no longer blocks signals as often, which should make it
- faster.
-
-k. Fixed a parsing bug that did not allow backslash to escape a single quote
- inside a $'...' construct.
-
-l. Fixed a bug that caused things like ${var:=$'value'} to be parsed
- incorrectly. This showed up in newer versions of autoconf.
-
-m. Fixed a bug in the bash-specific readline initialization that caused
- key bindings to bash-specific function names appearing in .inputrc to
- not be honored.
-
-n. Bash now sets the file descriptor it uses to save the file descriptor
- opened on a shell script to close on exec.
-
-o. Fixed a bug in the prompt string decoding that caused it to misbehave
- when presented an octal sequence of fewer than three characters.
-
-p. Fixed the `test' builtin to return an error if `[' is supplied a single
- argument that is not `]'.
-
-q. Fixed a bug that caused subshells started to run executable shell scripts
- without a leading `#!' to incorrectly inherit an argument list preceding
- a shell builtin (like such a script called from a script sourced with `.',
- where there were variable assignments preceding the `.' command)
-
-r. Fixed a bug that caused changes to variables supplied in an assignment
- statement preceding a shell builtin to not be honored (like a script
- run with `.').
-
-s. HOSTTYPE, OSTYPE, and MACHTYPE are set only if they do not have values
- when the shell is started.
-
-t. Fixed a bug that caused SIGINT to kill shell scripts after the script
- called `wait'.
-
-u. The `fc' builtin now tries to create its temporary files in the directory
- named by $TMPDIR.
-
-v. Bash no longer calls any Readline functions or uses any Readline variables
- not declared in readline.h.
-
-w. Fixed a bug that caused some substitutions involving $@ to not be split
- correctly, especially expansions of the form ${paramterOPword}.
-
-x. SSH2_CLIENT is now treated like SSH_CLIENT and not auto-exported if it
- appears in the initial environment.
-
-y. Fixed a couple of problems with shell scripts without a leading `#!'
- being executed out of shell functions that could cause core dumps if
- such a script attempted to execute `return'.
-
-z. Fixed a problem with the `-nt' and `-ot' binary operators for the
- `test/[' builtin and the `[[' conditional command that caused wrong
- return values if one of the file arguments did not exist.
-
-aa. Fixed a bug that caused non-interactive shells which had previously
- executed `shopt -s expand_aliases' to fail to expand aliases in a
- command like `(command) &'.
-
-2. Changes to Readline
-
-a. Changes to make most (but not yet all -- there is still crlf()) of the
- exported readline functions declared in readline.h have an rl_ prefix.
-
-b. More `const' changes in function arguments, mostly for completion
- functions.
-
-c. Fixed a bug in rl_forward that could cause the point to be set to before
- the beginning of the line in vi mode.
-
-d. Fixed a bug in the callback read-char interface to make it work when a
- readline function pushes some input onto the input stream with
- rl_execute_next (like the incremental search functions).
-
-e. Fixed a file descriptor leak in the history file manipulation code that
- was tripped when attempting to truncate a non-regular file (like
- /dev/null).
-
-f. Some existing variables are now documented and part of the public
- interface (declared in readline.h): rl_explict_arg, rl_numeric_arg,
- rl_editing_mode, rl_last_func.
-
-g. Renamed rltty_set_default_bindings to rl_tty_set_default_bindings and
- crlf to rl_crlf, so there are no public functions declared in readline.h
- without an `rl_' prefix. The old functions still exist for backwards
- compatibility.
-
-3. New Features in Bash
-
-a. A new loadable builtin, realpath, which canonicalizes and expands symlinks
- in pathname arguments.
-
-b. When `set' is called without options, it prints function defintions in a
- way that allows them to be reused as input. This affects `declare' and
- `declare -p' as well.
-
-4. New Features in Readline
-
-a. New application-callable function rl_set_prompt(const char *prompt):
- expands its prompt string argument and sets rl_prompt to the result.
-
-b. New application-callable function rl_set_screen_size(int rows, int cols):
- public method for applications to set readline's idea of the screen
- dimensions.
-
-c. The history example program (examples/histexamp.c) is now built as one
- of the examples.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.05-alpha1,
-and the previous version, bash-2.04-release.
-
-1. Changes to Bash
-
-a. A fix was made to allow newlines in compond array assignments.
-
-b. configure now checks for real-time signals with unusable values.
-
-c. Interactive shells no longer exit if a substitution fails because of an
- unset variable within a sourced file.
-
-d. Fixed a problem with incorrect matching of extended glob patterns when
- doing pattern substitution.
-
-e. `{' is now quoted by the completion code when it appears in a filename.
-
-f. Fixed an error in pattern matching that caused the matcher to not
- correctly skip the rest of a bracket expression after a character
- matched.
-
-g. Fixed a bug in the IFS word splitting code to make a non-whitespace IFS
- character preceded by IFS whitespace part of the current delimiter rather
- than generating a separate field.
-
-h. The {!prefix@} expansion now generates separate words, analogous to $@,
- when double-quoted.
-
-i. Command substitution now ignores NUL bytes in the command output, and the
- parser ignores them on input.
-
-j. A fix was made to the job control code to prevent hanging processes when
- the shell thinks background processes are running but the kernel returns
- -1/ECHILD from waitpid().
-
-k. `pwd' now prints an error message if the write fails when displaying the
- current directory.
-
-l. When in POSIX mode, the shell prints trap dispostions without a leading
- `SIG' in the signal specification.
-
-m. Fixed a parser bug that caused the current command's line count to be
- messed up by a compound array assignment.
-
-n. Fixed a bug in the unwind-protect code that caused bad behavior on machines
- where ints and pointers are not the same size.
-
-o. System-specific configure changes for: MacOS X.
-
-p. Changes for Cygwin to translate \r\n and \r to \n and to set file
- descriptors used for reading input to text mode in various places.
-
-q. Fixed a bug that caused `!' to occasionally not be honored when in
- a (...) subshell.
-
-r. Bash no longer assumes that getcwd() will return any useful error message
- in the buffer passed as an argument if the call fails.
-
-s. The `source', `.', and `fc' builtins no longer check whether a file is
- binary before reading commands from it.
-
-t. Subshells no longer turn off job control when they exit, since that
- sometimes resulted in the terminal being reset to the wrong process
- group.
-
-u. The history code no longer tries to save the second and subsequent lines
- of a multi-line command if the first line was not saved.
-
-v. The history saving code now does a better job of saving blank lines in a
- multi-line command.
-
-w. Removed a `feature' that made `ulimit' silently translate `unlimited' to
- the current hard limit, which obscured some kernel error returns.
-
-x. Fixed the grammar so that `}' is recognized as a reserved word after
- another reserved word, rather than requiring a `;' or newline. This
- means that constructs like
-
- { { echo a b c ; } }
-
- work as expected.
-
-y. Conditional commands ([[...]]) now perform tilde expansion on their
- arguments.
-
-z. Noted in the documentation that `set -a' will cause functions to be
- exported if they are defined after `set -a' is executed.
-
-aa. When an interactive login shell starts, if $PWD and $HOME refer to the
- same directory but are not the same string, $PWD is set to $HOME.
-
-bb. Fixed `printf' to handle invalid floating point numbers better.
-
-cc. Temporary files are now created with random filenames, to improve security.
-
-dd. The readline initialization code now binds the custom bash functions and
- key bindings after the readline defaults are set up.
-
-ee. Fixed the `source' builtin to no longer overwrite a shell function's
- argument list, even if the sourced file changes the positional parameters.
-
-ff. A bug fix was made in the expansion of `$*' in contexts where it should
- not be split, like assignment statements.
-
-gg. Fixed a bug in the parameter substring expansion to handle conditional
- arithmetic expressions ( exp ? val1 : val2 ) without cutting the expression
- off at the wrong `:'.
-
-hh. The `<>' redirection is no longer subject to the current setting of
- `noclobber', as POSIX.2 specifies.
-
-ii. Fixed a bug in the conditional command parsing code that caused expressions
- in parentheses to occasionally be parsed incorrectly.
-
-jj. Fixed a bug in the ((...)) arithmetic command to allow do...done or
- {...} to follow the )) without an intervening list terminator.
-
-kk. `printf' now treats `\E' the same as `\e' when performing backslash escape
- expansion for the `%b' format specifier.
-
-ll. When in POSIX mode, the shell no longer searches the current directory for
- a file to be sourced with `.' or `source' if `.' is not in $PATH.
-
-mm. Interactive comments are no longer turned off when POSIX mode is disabled.
-
-nn. The UID, EUID, HOSTNAME variables are not set if they are in the shell's
- environment when it starts up.
-
-oo. Fixed a bug in the `command' builtin so the effect of a command like
- `command exec 4<file' is as if the `command' had been omitted.
-
-pp. ${foo[@]} and ${foo[*]} now work as in ksh93 if `foo' is not an array
- variable.
-
-qq. ${#foo[X]}, where X is 0, @, or *, now work as in ksh93 if `foo' is not
- an array variable.
-
-rr. The shell's idea of an absolute pathname now takes into account a
- possible drive specification on Cygwin and other Windows systems.
-
-ss. Fixed a bug which caused incorrect parsing of some multi-character
- constructs if they were split across input lines with backslash-newline
- line continuation.
-
-tt. Fixed a bug that caused restricted shell mode to be set inappropriately
- when trying to execute a shell script without a leading `#!'.
-
-uu. Shell function definitions no longer require that the body be a group
- command ( {...} ), as POSIX.2 requires.
-
-vv. The `cd' and `pwd' builtins now process symlinks in pathnames internally
- and should require many fewer calls to getcwd().
-
-ww. Fixed a bug that caused a pipeline's process group to be set incorrectly
- if one of the pipeline elements contained a command substitution.
-
-xx. Fixed a bug that caused core dumps when expanding the value of HISTIGNORE.
-
-yy. The output of `set' is now quoted using $'...' so invisible characters are
- displayed as escape sequences.
-
-zz. Fixed the help text for `unset', since PATH and IFS may both be unset.
-
-aaa. The shell no longer puts directory names into the command hash table.
-
-bbb. Fixed a bug in `read' that caused it to occasionally free memory twice if
- it was interrupted after reading a large amount of data.
-
-ccc. Assignment statements that attempt to assign values to readonly variables
- now cause the command to return an error status.
-
-ddd. Fixed a bug that could cause incorrect output if a $(<file) construct was
- interrupted.
-
-eee. GROUPS and FUNCNAME now return an error status when assignment is
- attempted, but may be unset (in which case they lose their special
- properties). In all respects except unsetting, they are readonly.
-
-fff. The string-to-integer conversion code now ignores trailing whitespace in
- the string, even if strtol(3) does not.
-
-ggg. The tcsh magic-space function now does a better job of inserting the
- space close to where the point was before the history expansion, rather
- than just appending it.
-
-hhh. Fixed a bug which caused a file sourced from an interactive shell to
- fill up the jobs table if it ran lots of jobs.
-
-iii. Fixed a bug in the parameter pattern substitution code to avoid infinite
- recursion on zero-length matches.
-
-2. Changes to Readline
-
-a. When setting the terminal attributes on systems using `struct termio',
- readline waits for output to drain before changing the attributes.
-
-b. A fix was made to the history word tokenization code to avoid attempts to
- dereference a null pointer.
-
-c. Readline now defaults rl_terminal_name to $TERM if the calling application
- has left it unset, and tries to initialize with the resultant value.
-
-d. Instead of calling (*rl_getc_function)() directly to get input in certain
- places, readline now calls rl_read_key() consistently.
-
-e. Fixed a bug in the completion code that allowed a backslash to quote a
- single quote inside a single-quoted string.
-
-f. rl_prompt is no longer assigned directly from the argument to readline(),
- but uses memory allocated by readline. This allows constant strings to
- be passed to readline without problems arising when the prompt processing
- code wants to modify the string.
-
-g. Fixed a bug that caused non-interactive history searches to return the
- wrong line when performing multiple searches backward for the same string.
-
-h. Many variables, function arguments, and function return values are now
- declared `const' where appropriate, to improve behavior when linking with
- C++ code.
-
-i. The control character detection code now works better on systems where
- `char' is unsigned by default.
-
-j. The vi-mode numeric argument is now capped at 999999, just like emacs mode.
-
-k. The Function, CPFunction, CPPFunction, and VFunction typedefs have been
- replaced with a set of specific prototyped typedefs, though they are
- still in the readline header files for backwards compatibility.
-
-m. Nearly all of the (undocumented) internal global variables in the library
- now have an _rl_ prefix -- there were a number that did not, like
- screenheight, screenwidth, alphabetic, etc.
-
-n. The ding() convenience function has been renamed to rl_ding(), though the
- old function is still defined for backwards compatibility.
-
-o. The completion convenience functions filename_completion_function,
- username_completion_function, and completion_matches now have an rl_
- prefix, though the old names are still defined for backwards compatibility.
-
-p. The functions shared by readline and bash (linkage is satisfied from bash
- when compiling with bash, and internally otherwise) now have an sh_ prefix.
-
-q. Changed the shared library creation procedure on Linux and BSD/OS 4.x so
- that the `soname' contains only the major version number rather than the
- major and minor numbers.
-
-r. Fixed a redisplay bug that occurred when the prompt spanned more than one
- physical line and contained invisible characters.
-
-3. New Features in Bash
-
-a. Added a new `--init-file' invocation argument as a synonym for `--rcfile',
- per the new GNU coding standards.
-
-b. The /dev/tcp and /dev/udp redirections now accept service names as well as
- port numbers.
-
-c. `complete' and `compgen' now take a `-o value' option, which controls some
- of the aspects of that compspec. Valid values are:
-
- default - perform bash default completion if programmable
- completion produces no matches
- dirnames - perform directory name completion if programmable
- completion produces no matches
- filenames - tell readline that the compspec produces filenames,
- so it can do things like append slashes to
- directory names and suppress trailing spaces
-
-4. New Features in Readline
-
-a. The blink timeout for paren matching is now settable by applications.
-
-b. _rl_executing_macro has been renamed to rl_executing_macro, which means
- it's now part of the public interface.
-
-c. Readline has a new variable, rl_readline_state, which is a bitmap that
- encapsulates the current state of the library; intended for use by
- callbacks and hook functions.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-release,
-and the previous version, bash-2.04-beta5.
-
-1. Changes to Bash
-
-a. Better compile-time and configure-time checks for the necessity of
- inet_aton().
-
-b. A bug was fixed in the expansion of "${@:-}" when there are positional
- parameters.
-
-c. A typo was fixed in the output of `complete'.
-
-d. The matches generated for a word by the `-W' argument to complete and
- compgen are now matched against the word being completed, and only
- matches are returned as the result.
-
-e. Some fixes were made for systems which do not restart read(2) when a
- signal caught by bash is received.
-
-f. A bug was fixed which caused the umask to be set to 0 when an invalid
- symbolic mode mask was parsed.
-
-g. Fixed a bug that could cause a core dump if a SIGCHLD was received while
- performing an assignment statement using command substitution.
-
-h. Changed the word splitting function for programmable completion so cases
- in which the cursor is between words are handled a bit better.
-
-2. Changes to Readline
-
-a. rl_funmap_names() is now documented.
-
-3. New Features in Bash
-
-a. The LC_NUMERIC variable is now treated specially, and used to set the
- LC_NUMERIC locale category for number formatting, e.g., when `printf'
- displays floating-point numbers.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-beta5,
-and the previous version, bash-2.04-beta4.
-
-1. Changes to Bash
-
-a. A couple of changes were made to the Makefiles for easier building on
- non-Unix systems.
-
-b. Fixed a bug where the current prompt would be set to $PS2 at startup.
-
-c. The shell script that tests an already-installed version was changed to
- remove the directory it created its test programs in at exit.
-
-d. Several changes were made to the code that tokenizes an input line for
- the programmable completion code. Shell metacharacters will now appear
- as individual words in the word list passed to the completion functions.
- Some of the example completion shell functions were changed to understand
- redirection operators.
-
-e. A bug was fixed that, under obscure circumstances, could confuse the
- parser when a shell function was run by the programmable completion code.
-
-f. A bug was fixed in the ulimit builtin for systems not using getrlimit().
-
-g. The execution code now propagates the correct exit status back to the rest
- of the code if the return value of a subshell command was being inverted.
- Some new test cases for inverting return values with the `!' reserved
- word have been added.
-
-h. Negative exponents in the arithmetic evaluation of v**e now return an
- evaluation error.
-
-i. A bug that caused bash to check the wrong process in a pipeline for
- abnormal termination (and consequently resetting the terminal attributes)
- was fixed.
-
-j. Fixed a bug that caused $PS2 to be displayed after PROMPT_COMMAND was
- executed.
-
-2. Changes to Readline
-
-1. Fixed a bug in a C preprocessor define that caused the keypad control
- functions to be compiled out for all platforms except DJGPP.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-beta4,
-and the previous version, bash-2.04-beta3.
-
-1. Changes to Bash
-
-a. A couple of changes were made to the redirection to attempt to avoid
- race conditions and malicious file replacement.
-
-2. A change was made to the string evaluation code (used for command
- substitution, `eval', and the `.' builtin) to fix an obscure core
- dump on alpha machines.
-
-3. A bug that caused $LINENO to be wrong when executing arithmetic for
- commands was fixed.
-
-4. A couple of memory leaks in the programmable completion code were fixed.
-
-5. A bug that could cause a core dump by freeing memory twice during a call
- to `eval' if `set -u' had been enabled and an undefined variable was
- referenced was fixed.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-beta3,
-and the previous version, bash-2.04-beta2.
-
-1. Changes to Bash
-
-a. Bash should run the appropriate startup files when invoked by ssh2.
-
-b. Fixed a bug in the parsing of conditional commands that could cause a
- core dump.
-
-c. Fixed a bug in parsing job specifications that occasionally caused
- core dumps when an out-of-range job was referenced.
-
-d. Fixed the `type' and `command' builtins to do better reporting of
- commands that are not found in $PATH or the hash table.
-
-e. Fixed a POSIX.2 compliance problem in the command builtin -- commands
- are supposed to be reported as full pathnames.
-
-f. The `echo' builtin now returns failure if a write error occurs.
-
-g. Fixed a bug which caused the locale to not be reset correctly when
- LC_ALL was unset.
-
-h. Changed description of `getopts' in man page and reference manual to make
- it clear that option characters may be characters other than letters.
-
-i. If the shell exits while in a function, make sure that any trap on EXIT
- doesn't think the function is still executing.
-
-j. Bashbug now tries harder to find a usable editor if $EDITOR is not set,
- rather than simply defaulting to `emacs'.
-
-k. Changes to the scripts that guess and canonicalize the system type, from
- the latest `automake' distribution via Debian.
-
-l. When using named pipes for process substitution, make sure the file
- descriptors opened for reading are set to non-blocking mode.
-
-m. Fixed a bug that caused termination of pipelines that are killed by a
- signal to not be reported in some cases.
-
-n. When not in literal-history mode, shell comment lines are not added to
- the history list.
-
-o. When running in POSIX.2 mode, bash no longer performs word splitting on
- the expanded value of the word supplied as the filename argument to
- redirection operators.
-
-p. The prompt string decoding code now backslash-quotes only characters that
- are special within double quotes when expanding the \w and \W escape
- sequences.
-
-q. Fixed a bug in the prompt decoding code that could cause a non-interactive
- shell to seg fault if `\u' was used in PS4 and the shell was in xtrace
- mode.
-
-r. Fixed a bug that caused function definitions to be printed with any
- redirections that should be attached to the entire function before the
- closing brace.
-
-s. Changed the tilde expansion code for Cygwin systems to avoid creating
- pathnames beginning with `//' if $HOME == `/'.
-
-t. Fixed a couple of autoconf tests to avoid creating files with fixed names
- in /tmp.
-
-u. The `trap' and `kill' builtins now know the names of the POSIX.1b real-
- time signals on systems which support them.
-
-2. Changes to Readline
-
-a. Fixed a problem with the single-quote quoting function that could cause
- buffer overflows.
-
-b. Fixed a bug that caused incorrect `stat characters' to be printed if
- the files being completed were in the root directory and visible-stats
- was enabled.
-
-3. New Features in Bash
-
-a. There is a new `rbash.1' manual page, from the Debian release.
-
-b. The `--enable-usg-echo-default' option to `configure' has been renamed to
- `--enable-xpg-echo-default'. The old option is still there for backwards
- compatibility.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-beta2,
-and the previous version, bash-2.04-beta1.
-
-1. Changes to Bash
-
-a. Fixed a bug that could cause pipes to be closed inappropriately in
- some obscure cases.
-
-b. Fixed a bug that caused creation of the exported environment to clobber
- the current command string if there were any exported shell functions.
-
-c. Some changes were made to reduce bash's memory usage.
-
-d. Fixed a problem with programmable completion and filenames to be
- completed containing quote characters.
-
-e. Changed the code the removes named pipes created for the <(...) and >(...)
- expansions to defer removal until after any current shell function has
- finished executing.
-
-f. Fixed a bug in `select' which caused it to not handle the `continue'
- builtin correctly.
-
-g. Autoconf tests added for cygwin32 and mingw32.
-
-2. New Features in Bash
-
-a. The `--with-bash-malloc' configure option replaces `--with-gnu-malloc'
- (which is still there for backwards compatibility).
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-beta1,
-and the previous version, bash-2.04-alpha1.
-
-1. Changes to Bash
-
-a. Fixed a bug in the programmable completion code that occurred when
- trying to complete command lines containing a `;' or `@'.
-
-b. The file descriptor from which the shell is reading a script is now
- moved to a file descriptor above the user-addressible range.
-
-c. Changes to `printf' so that it can handle integers beginning with 0
- or 0x as octal and hex, respectively.
-
-d. Fixes to the programmable completion code so it handles nonsense like
- `compgen -C xyz' gracefully.
-
-e. The shell no longer modifies the signal handler for SIGPROF, allowing
- profiling again on certain systems.
-
-f. The shell checks for a new window size, if the user has requested it,
- after a process exits due to a signal.
-
-g. Fixed a bug with variables with null values in a program's temporary
- environment and the bash getenv() replacement.
-
-h. `declare' and the other builtins that take variable assignments as
- arguments now honor `set -a' and mark modified variables for export.
-
-i. Some changes were made for --dump-po-strings mode when writing strings
- with embedded newlines.
-
-j. The code that caches export strings from the initial environment now
- duplicates the string rather than just pointing into the environment.
-
-k. The filename completion quoting code now uses single quotes by default
- if the filename being completed contains newlines, since \<newline>
- has a special meaning to the parser.
-
-l. Bash now uses typedefs bits32_t and u_bits32_t instead of int32_t and
- u_int32_t, respectively to avoid conflicts on certain Unix versions.
-
-m. Configuration changes were made for: Rhapsody, Mac OS, FreeBSD-3.x.
-
-n. Fixed a problem with hostname-to-ip-address translation in the
- /dev/(tcp|udp)/hostname/port redirection code.
-
-o. The texinfo manual has been reorganized slightly.
-
-p. Filename generation (globbing) range comparisons in bracket expressions
- no longer use strcoll(3) even if it is available, since it has unwanted
- effects in certain locales.
-
-q. Fixed a cosmetic problem in the source that caused the shell to not
- compile if DPAREN_ARITHMETIC was not defined but ARITH_FOR_COMMAND was.
-
-r. Fixed a bug in the here-document code tripped when the file descriptor
- opened to the file containing the text of the here document was the
- same as a redirector specified by the user.
-
-s. Fixed a bug where the INVERT_RETURN flag was not being set for `pipeline'
- in `time ! pipeline'.
-
-t. Fixed a bug with the `wait' builtin which manifested itself when an
- interrupt was received while the shell was waiting for asynchronous
- processes in a shell script.
-
-u. Fixed the DEBUG trap code so that it has the correct value of $?.
-
-v. Fixed a bug in the parameter pattern substitution code that could cause
- the shell to attempt to free unallocated memory if the pattern started
- with `/' and an expansion error occurs.
-
-w. Fixed a bug in the positional parameter substring code that could
- cause the shell to loop freeing freed memory.
-
-x. Fixed a bug in the positional parameter pattern substitution code so
- that it correctly handles null replacement strings with a pattern
- string prefixed with `%' or `#'.
-
-y. The shell no longer attempts to import functions from the environment if
- started with `-n'.
-
-z. Fixed a bug that caused `return' in a command substitution executed in
- a shell function to return from the function in a subshell and continue
- execution.
-
-aa. `hash -p /pathname/with/slashes name' is no longer allowed when the shell
- is restricted.
-
-bb. The wait* job control functions now behave better if called when there
- are no unwaited-for children.
-
-cc. Command substitution no longer unconditionally disables job control in
- the subshell started to run the command.
-
-dd. A bug was fixed that occasionally caused traps to mess up the parser
- state.
-
-ee. `bashbug' now honors user headers in the mail message it sends.
-
-ff. A bug was fixed that caused the `:p' history modifier to not print the
- history expansion if the `histverify' option was set.
-
-2. Changes to Readline
-
-a. Fixed a bug in the redisplay code for lines with more than 256 line
- breaks.
-
-b. A bug was fixed which caused invisible character markers to not be
- stripped from the prompt string if the terminal was in no-echo mode.
-
-c. Readline no longer tries to get the variables it needs for redisplay
- from the termcap entry if the calling application has specified its
- own redisplay function. Readline treats the terminal as `dumb' in
- this case.
-
-d. Fixes to the SIGWINCH code so that a multiple-line prompt with escape
- sequences is redrawn correctly.
-
-3. New Features in Bash
-
-a. `bashbug' now accepts `--help' and `--version' options.
-
-b. There is a new `xpg_echo' option to `shopt' that controls the behavior
- of echo with respect to backslash-escaped characters at runtime.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-alpha1,
-and the previous version, bash-2.04-devel.
-
-1. Changes to Bash
-
-a. Fixed a bug that could cause core dumps when performing substring
- expansion.
-
-b. Shared object configuration changes for: Solaris, OSF/1
-
-c. The POSIX_GLOB_LIBRARY code that uses the POSIX.2 globbing facilities
- for pathname expansion now understands GLOBIGNORE.
-
-d. The code that implements `eval' was changed to save the value of the
- current prompt, so an eval in a shell function called by the programmable
- completion code will not change the prompt to $PS2.
-
-e. Restored the undocumented NON_INTERACTIVE_LOGIN_SHELLS #define to
- config-top.h. If this is defined, all login shells will read the
- startup files, not just interactive and non-interactive started with
- the `--login' option.
-
-f. Fixed a bug that caused the expansion code to occasionally dump core if
- IFS contained characters > 128.
-
-g. Fixed a problem with the grammar so that a newline is not required
- after the `))' in the new-style arithmetic for statement; a semicolon
- may be used as expected.
-
-h. Variable indirection may now reference the shell's special variables.
-
-i. The $'...' and $"..." constructs are now added to the history correctly
- if they contain newlines and command-oriented history is enabled.
-
-j. It is now an error to try to assign a value to a function-local copy
- of a readonly shell variable (declared with the `local' builtin).
-
-2. Changes to Readline
-
-a. The history file code now uses O_BINARY mode when reading and writing
- the history file on cygwin32.
-
-3. New Features in Bash
-
-a. A new programmable completion facility, with two new builtin commands:
- complete and compgen.
-
-b. configure has a new option, `--enable-progcomp', to compile in the
- programmable completion features (enabled by default).
-
-c. `shopt' has a new option, `progcomp', to enable and disable programmable
- completion at runtime.
-
-d. Unsetting HOSTFILE now clears the list of hostnames used for completion.
-
-4. New Features in Readline
-
-a. A new variable, rl_gnu_readline_p, always 1. The intent is that an
- application can verify whether or not it is linked with the `real'
- readline library or some substitute.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.04-devel,
-and the previous version, bash-2.03-release.
-
-1. Changes to Bash
-
-a. System-specific configuration and source changes for: Interix, Rhapsody
-
-b. Fixed a bug in execute_cmd.c that resulted in a compile-time error if
- JOB_CONTROL was not defined.
-
-c. An obscure race condition in the trap code was fixed.
-
-d. The string resulting from $'...' is now requoted to avoid any further
- expansion.
-
-e. The $'...' quoting syntax now allows backslash to escape a single quote,
- for ksh-93 compatibility.
-
-f. The $"..." quoting syntax now escapes backslashes and double quotes in
- the translated string when displaying them with the --dump-po-strings
- option.
-
-g. `echo -e' no longer converts \' to '.
-
-h. Fixes were made to the extended globbing code to handle embedded (...)
- patterns better.
-
-i. Some improvements were made to the code that unsets `nodelay' mode on
- the file descriptor from which bash is reading input.
-
-j. Some changes were made to the replacement termcap library for better
- operation on MS-DOS.
-
-k. Some changes were made to the tilde expansion code to handle backslash
- as a pathname separator on MS-DOS.
-
-l. The source has been reorganized a little bit -- there is now an `include'
- subdirectory, and lib/posixheaders has been removed.
-
-m. Improvements were made to the `read' builtin so that it makes many
- fewer read(2) system calls.
-
-n. The expansion of $- will include `c' and `s' when those options are
- supplied at shell invocation.
-
-o. Several improvments were made to the completion code: variable completion
- now works better when there are unterminated expansions, command
- completion understands quotes better, and completion now works in certain
- unclosed $(... constructs.
-
-p. The arithmetic expansion code was fixed to not need the value of a
- variable being assigned a value (fixes the "ss=09; let ss=10" bug).
-
-q. Some changes were made to make exported environment creation faster.
-
-r. The html documentation will be installed into $(htmldir) if that variable
- has a value when `make install' is run.
-
-s. Fixed a bug that would cause the bashrc file to be sourced inappropriately
- when bash is started by sshd.
-
-t. The SSH_CLIENT environment variable is no longer auto-exported.
-
-u. A bug that caused redirections with (...) subshells to be performed in
- the wrong order was fixed.
-
-v. A bug that occasionally caused inappropriate expansion of assignment
- statements in compound array assignments was fixed.
-
-w. The code that parses the words in a compound array assignment was
- simplified considerably and should work better now.
-
-x. Fixes to the non-job-control code in nojobs.c to make it POSIX.2-compliant
- when a user attempts to retrieve the status of a terminated background
- process.
-
-y. Fixes to the `printf' builtin so that it doesn't try to expand all
- backslash escape sequences in the format string before parsing it for
- % format specifiers.
-
-2. Changes to Readline
-
-a. The history library tries to truncate the history file only if it is a
- regular file.
-
-b. A bug that caused _rl_dispatch to address negative array indices on
- systems with signed chars was fixed.
-
-c. rl-yank-nth-arg now leaves the history position the same as when it was
- called.
-
-d. Changes to the completion code to handle MS-DOS drive-letter:pathname
- filenames.
-
-e. Completion is now case-insensitive by default on MS-DOS.
-
-f. Fixes to the history file manipulation code for MS-DOS.
-
-g. Readline attempts to bind the arrow keys to appropriate defaults on MS-DOS.
-
-h. Some fixes were made to the redisplay code for better operation on MS-DOS.
-
-i. The quoted-insert code will now insert tty special chars like ^C.
-
-j. A bug was fixed that caused the display code to reference memory before
- the start of the prompt string.
-
-k. More support for __EMX__ (OS/2).
-
-l. A bug was fixed in readline's signal handling that could cause infinite
- recursion in signal handlers.
-
-m. A bug was fixed that caused the point to be less than zero when rl_forward
- was given a very large numeric argument.
-
-n. The vi-mode code now gets characters via the application-settable value
- of rl_getc_function rather than calling rl_getc directly.
-
-3. New Features in Bash
-
-a. The history builtin has a `-d offset' option to delete the history entry
- at position `offset'.
-
-b. The prompt expansion code has two new escape sequences: \j, the number of
- active jobs; and \l, the basename of the shell's tty device name.
-
-c. The `bind' builtin has a new `-x' option to bind key sequences to shell
- commands.
-
-d. There is a new shell option, no_empty_command_completion, which, when
- enabled, disables command completion when TAB is typed on an empty line.
-
-e. The `help' builtin has a `-s' option to just print a builtin's usage
- synopsys.
-
-f. There are several new arithmetic operators: id++, id-- (variable
- post-increment/decrement), ++id, --id (variabl pre-increment/decrement),
- expr1 , expr2 (comma operator).
-
-g. There is a new ksh-93 style arithmetic for command:
- for ((expr1 ; expr2; expr3 )); do list; done
-
-h. The `read' builtin has a number of new options:
- -t timeout only wait timeout seconds for input
- -n nchars only read nchars from input instead of a full line
- -d delim read until delim rather than newline
- -s don't echo input chars as they are read
-
-i. The redirection code now handles several filenames specially:
- /dev/fd/N, /dev/stdin, /dev/stdout, and /dev/stderr, whether or
- not they are present in the file system.
-
-j. The redirection code now recognizes pathnames of the form
- /dev/tcp/host/port and /dev/udp/host/port, and tries to open a socket
- of the appropriate type to the specified port on the specified host.
-
-k. The ksh-93 ${!prefix*} expansion, which expands to the names of all
- shell variables whose names start with prefix, has been implemented.
-
-l. There is a new dynamic variable, FUNCNAME, which expands to the name of
- a currently-executing function. Assignments to FUNCNAME have no effect.
-
-m. The GROUPS variable is no longer readonly; assignments to it are silently
- discarded. This means it can be unset.
-
-4. New Features in Readline
-
-a. Parentheses matching is now always compiled into readline, and enabled
- or disabled when the value of the `blink-matching-paren' variable is
- changed.
-
-b. MS-DOS systems now use ~/_inputrc as the last-ditch inputrc filename.
-
-c. MS-DOS systems now use ~/_history as the default history file.
-
-d. history-search-{forward,backward} now leave the point at the end of the
- line when the string to search for is empty, like
- {reverse,forward}-search-history.
-
-e. history-search-{forward,backward} now leave the last history line found
- in the readline buffer if the second or subsequent search fails.
-
-f. New function for use by applications: rl_on_new_line_with_prompt, used
- when an application displays the prompt itself before calling readline().
-
-g. New variable for use by applications: rl_already_prompted. An application
- that displays the prompt itself before calling readline() must set this to
- a non-zero value.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.03-release,
-and the previous version, bash-2.03-beta2.
-
-1. Changes to Bash
-
-a. A file descriptor leak in the `fc' builtin was fixed.
-
-b. A bug was fixed in the `read' builtin that caused occasional spurious
- failures when using `read -e'.
-
-c. The version code needed to use the value of the cpp variable
- CONF_MACHTYPE rather than MACHTYPE.
-
-d. A new test was added to exercise the command printing and copying code.
-
-e. A bug was fixed that caused `time' to be recognized as a reserved word
- if it was the first pattern in a `case' statement pattern list.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.03-beta2,
-and the previous version, bash-2.03-beta1.
-
-1. Changes to Bash
-
-a. Slight additions to support/shobj-conf, mostly for the benefit of AIX 4.2.
-
-b. config.{guess,sub} support added for the NEC SX4.
-
-c. Changed some of the cross-compiling sections of the configure macros in
- aclocal.m4 so that configure won't abort.
-
-d. Slight changes to how the HTML versions of the bash and readline manuals
- are generated.
-
-e. Fixed conditional command printing to avoid interpreting printf `%'-escapes
- in arguments to [[.
-
-f. Don't include the bash malloc on all variants of the alpha processor.
-
-g. Changes to configure to make --enable-profiling work on Solaris 2.x.
-
-h. Fixed a bug that manifested itself when shell functions were called
- between calls to `getopts'.
-
-i. Fixed pattern substitution so that a bare `#'as a pattern causes the
- replacement string to be prefixed to the search string, and a bare
- `%' causes the replacement string to be appended to the search string.
-
-j. Fixed a bug in the command execution code that caused child processes
- to occasionally have the wrong value for $!.
-
-2. Changes to Readline
-
-a. Added code to the history library to catch history substitutions using
- `&' without a previous history substitution or search having been
- performed.
-
-3. New Features in Bash
-
-4. New Features in Readline
-
-a. New bindable variable: `isearch-terminators'.
-
-b. New bindable function: `forward-backward-delete-char' (unbound by default).
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.03-beta1,
-and the previous version, bash-2.03-alpha.
-
-1. Changes to Bash
-
-a. A change was made to the help text for `{...}' to make it clear that a
- semicolon is required before the closing brace.
-
-b. A fix was made to the `test' builtin so that syntax errors cause test
- to return an exit status > 1.
-
-c. Globbing is no longer performed on assignment statements that appear as
- arguments to `assignment builtins' such as `export'.
-
-d. System-specific configuration changes were made for: Rhapsody,
- AIX 4.2/gcc, BSD/OS 4.0.
-
-e. New loadable builtins: ln, unlink.
-
-f. Some fixes were made to the globbing code to handle extended glob patterns
- which immediately follow a `*'.
-
-g. A fix was made to the command printing code to ensure that redirections
- following compound commands have a space separating them from the rest
- of the command.
-
-h. The pathname canonicalization code was changed to produce fewer leading
- `//' sequences, since those are interpreted as network file system
- pathnames on some systems.
-
-i. A fix was made so that loops containing `eval' commands in commands passed
- to `bash -c' would not exit prematurely.
-
-j. Some changes were made to the job reaping code when the shell is not
- interactive, so the shell will retain exit statuses longer for examination
- by `wait'.
-
-k. A fix was made so that `jobs | command' works again.
-
-l. The erroneous compound array assignment var=((...)) is now a syntax error.
-
-m. A change was made to the dynamic loading code in `enable' to support
- Tenon's MachTen.
-
-n. A fix was made to the globbing code so that extended globbing patterns
- will correctly match `.' in a bracket expression.
-
-2. Changes to Readline
-
-a. A fix was made to the completion code in which a typo caused the wrong
- value to be passed to the function that computed the longest common
- prefix of the list of matches.
-
-b. The completion code now checks the value of rl_filename_completion_desired,
- which is set by application-supplied completion functions to indicate
- that filename completion is being performed, to decide whether or not to
- call an application-supplied `ignore completions' function.
-
-3. New Features in Bash
-
-a. A change was made to the startup file code so that any shell begun with
- the `--login' option, even non-interactive shells, will source the login
- shell startup files.
-
-4. New Features in Readline
-
-a. A new variable, rl_erase_empty_line, which, if set by an application using
- readline, will cause readline to erase, prompt and all, lines on which the
- only thing typed was a newline.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.03-alpha,
-and the previous version, bash-2.02.1-release.
-
-1. Changes to Bash
-
-a. System-specific configuration changes were made for: Irix 6.x, Unixware 7.
-
-b. The texi2dvi and texi2html scripts were updated to the latest versions
- from the net.
-
-c. The configure tests that determine which native type is 32 bits were
- changed to not require a compiled program.
-
-d. Fixed a bug in shell_execve that could cause memory to be freed twice
- after a failed exec.
-
-e. The `printf' test uses `diff -a' if it's available to prevent confusion
- due to the non-ascii output.
-
-f. Shared object configuration is now performed by a shell script,
- support/shobj-conf, which generates values to be substituted into
- makefiles by configure.
-
-g. Some changes were made to `ulimit' to avoid the use of RLIM_INVALID as a
- return value.
-
-h. Changes were made to `ulimit' to work around HPUX 9.x's peculiar
- handling of RLIMIT_FILESIZE.
-
-i. Some new loadable builtins were added: id, printenv, sync, whoami, push,
- mkdir. `pushd', `popd', and `dirs' can now be built as regular or
- loadable builtins from the same source file.
-
-j. Changes were made to `printf' to handle NUL bytes in the expanded format
- string.
-
-k. The various `make clean' Makefile targets now descend into lib/sh.
-
-l. The `type' builtin was changed to use the internal `getopt' so that things
- like `type -ap' work as expected.
-
-m. There is a new configuration option, --with-installed-readline, to link
- bash with a locally-installed version of readline. Only readline version
- 4.0 and later releases can support this. Shared and static libraries
- are supported. The installed include files are used.
-
-n. There is a new autoconf macro used to find which basic type is 64 bits.
-
-o. Dynamic linking and loadable builtins should now work on SCO 3.2v5*,
- AIX 4.2 with gcc, Unixware 7, and many other systems using gcc, where
- the `-shared' options works correctly.
-
-p. A bug was fixed in the bash filename completion code that caused memory to
- be freed twice if a directory name containing an unset variable was
- completed and the -u option was set.
-
-q. The prompt expansion code now quotes the `$' in the `\$' expansion so it
- is not processed by subsequent parameter expansion.
-
-r. Fixed a parsing bug that caused a single or double quote after a `$$' to
- trigger ANSI C expansion or locale translation.
-
-s. Fixed a bug in the globbing code that caused quoted filenames containing
- no globbing characters to sometimes be incorrectly expanded.
-
-t. Changes to the default prompt strings if prompt string decoding is not
- compiled into the shell.
-
-u. Added `do', `then', `else', `{', and `(' to the list of keywords that may
- precede the `time' reserved word.
-
-v. The shell may now be cross-built for BeOS as well as cygwin32.
-
-w. The conditional command execution code now treats `=' the same as `=='
- for deciding when to perform pattern matching.
-
-x. The `-e' option no longer causes the shell to exit if a command exits
- with a non-zero status while running the startup files.
-
-y. The `printf' builtin no longer dumps core if a modifier is supplied in
- the format string without a conversion character (e.g. `%h').
-
-z. Array assignments of the form a=(...) no longer show up in the history
- list.
-
-aa. The parser was fixed to obey the POSIX.2 rules for finding the closing
- `}' in a ${...} expression.
-
-bb. The history file is now opened with mode 0600 rather than 0666, so bash
- no longer relies on the user's umask being set appropriately.
-
-cc. Setting LANG no longer causes LC_ALL to be assigned a value; bash now
- relies on proper behavior from the C library.
-
-dd. Minor changes were made to allow quoted variable expansions using
- ${...} to be completed correctly if there is no closing `"'.
-
-ee. Changes were made to builtins/Makefile.in so that configuring the shell
- with `--enable-profiling' works right and builtins/mkbuiltins is
- generated.
-
-2. Changes to Readline
-
-a. The version number is now 4.0.
-
-b. There is no longer any #ifdef SHELL code in the source files.
-
-c. Some changes were made to the key binding code to fix memory leaks and
- better support Win32 systems.
-
-d. Fixed a silly typo in the paren matching code -- it's microseconds, not
- milliseconds.
-
-e. The readline library should be compilable by C++ compilers.
-
-f. The readline.h public header file now includes function prototypes for
- all readline functions, and some changes were made to fix errors in the
- source files uncovered by the use of prototypes.
-
-g. The maximum numeric argument is now clamped at 1000000.
-
-h. Fixes to rl_yank_last_arg to make it behave better.
-
-i. Fixed a bug in the display code that caused core dumps if the prompt
- string length exceeded 1024 characters.
-
-j. The menu completion code was fixed to properly insert a single completion
- if there is only one match.
-
-k. A bug was fixed that caused the display code to improperly display tabs
- after newlines.
-
-3. New Features in Bash
-
-a. New `shopt' option, `restricted_shell', indicating whether or not the
- shell was started in restricted mode, for use in startup files.
-
-b. Filename generation is now performed on the words between ( and ) in
- array assignments (which it probably should have done all along).
-
-c. OLDPWD is now auto-exported, as POSIX.2 seems to require.
-
-d. ENV and BASH_ENV are read-only variables in a restricted shell.
-
-4. New Features in Readline
-
-a. Many changes to the signal handling:
- o Readline now catches SIGQUIT and cleans up the tty before returning;
- o A new variable, rl_catch_signals, is available to application writers
- to indicate to readline whether or not it should install its own
- signal handlers for SIGINT, SIGTERM, SIGQUIT, SIGALRM, SIGTSTP,
- SIGTTIN, and SIGTTOU;
- o A new variable, rl_catch_sigwinch, is available to application
- writers to indicate to readline whether or not it should install its
- own signal handler for SIGWINCH, which will chain to the calling
- applications's SIGWINCH handler, if one is installed;
- o There is a new function, rl_free_line_state, for application signal
- handlers to call to free up the state associated with the current
- line after receiving a signal;
- o There is a new function, rl_cleanup_after_signal, to clean up the
- display and terminal state after receiving a signal;
- o There is a new function, rl_reset_after_signal, to reinitialize the
- terminal and display state after an application signal handler
- returns and readline continues
-
-b. There is a new function, rl_resize_terminal, to reset readline's idea of
- the screen size after a SIGWINCH.
-
-c. New public functions: rl_save_prompt and rl_restore_prompt. These were
- previously private functions with a `_' prefix.
-
-d. New function hook: rl_pre_input_hook, called just before readline starts
- reading input, after initialization.
-
-e. New function hook: rl_display_matches_hook, called when readline would
- display the list of completion matches. The new function
- rl_display_match_list is what readline uses internally, and is available
- for use by application functions called via this hook.
-
-f. New bindable function, delete-char-or-list, like tcsh.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.02.1-release,
-and the previous version, bash-2.02-release.
-
-1. Changes to Bash
-
-a. A bug that caused the bash readline support to not compile unless aliases
- and csh-style history were configured into the shell was fixed.
-
-b. Fixed a bug that could cause a core dump when here documents contained
- more than 1000 characters.
-
-c. Fixed a bug that caused a CDPATH entry of "" to not be treated the same
- as the current directory when in POSIX mode.
-
-d. Fixed an alignment problem with the memory returned by the bash malloc,
- so returned memory is now 64-bit aligned.
-
-e. Fixed a bug that caused command substitutions executed within pipelines
- to put the terminal in the wrong process group.
-
-f. Fixes to support/config.sub for: alphas, SCO Open Server and Open Desktop,
- Unixware 2, and Unixware 7.
-
-g. Fixes to the pattern matching code to make it work correctly for eight-bit
- characters.
-
-h. Fixed a problem that occasionally caused the shell to display the wrong
- value for the new working directory when changing to a directory found
- in $CDPATH when in physical mode.
-
-i. Fixed a bug that caused core dumps when using conditional commands in
- shell functions.
-
-j. Fixed a bug that caused the printf builtin to loop forever if the format
- string did not consume any of the arguments.
-
-k. Fixed a bug in the parameter expansion code that caused "$@" to be
- incorrectly split if $IFS did not contain a space character.
-
-l. Fixed a bug that could cause a core dump when completing hostnames if
- the number of matching hostnames was an exact multiple of 16.
-
-m. Fixed a bug that caused the shell to fork too early when a command
- such as `%2 &' was given.
-
-2. Changes to Readline
-
-a. Fixed a problem with redisplay that showed up when the prompt string was
- longer than the screen width and the prompt contained invisible characters.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.02-release,
-and the previous version, bash-2.02-beta2.
-
-1. Changes to Bash
-
-a. A bug was fixed that caused the terminal process group to be set
- incorrectly when performing command substitution of builtins in a
- pipeline.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.02-beta2,
-and the previous version, bash-2.02-beta1.
-
-1. Changes to Bash
-
-a. Attempting to `wait' for stopped jobs now generates a warning message.
-
-b. Pipelines which exit due to SIGPIPE in non-interactive shells are now
- not reported if the shell is compiled -DDONT_REPORT_SIGPIPE.
-
-c. Some changes were made to builtins/psize.sh and support/bashbug.sh to
- attempt to avoid some /tmp file races and surreptitious file
- substitutions.
-
-d. Fixed a bug that caused the shell not to compile if configured with
- dparen arithmetic but without aliases.
-
-e. Fixed a bug that caused the input stream to be switched when assigning
- empty arrays with `bash -c'.
-
-f. A bug was fixed in the readline expansion glue code that caused bash to
- dump core when expanding lines with an unclosed single quote.
-
-g. A fix was made to the `cd' builtin so that using a non-empty directory
- from $CDPATH results in an absolute pathname of the new current working
- directory to be displayed after the current directory is changed.
-
-h. Fixed a bug in the variable assignment code that caused the shell to
- dump core when referencing an unset variable with `set -u' enabled in
- an assignment statement preceding a command.
-
-i. Fixed a bug in the exit trap code that caused reserved words to not be
- recognized under certain circumstances.
-
-j. Fixed a bug in the parameter pattern substitution code so that quote
- removal is performed.
-
-k. The shell should now configure correctly on Apple Rhapsody systems.
-
-l. The `kill' builtin now prints a usage message if it is not passed any
- arguments.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.02-beta1,
-and the previous version, bash-2.02-alpha1.
-
-1. Changes to Bash
-
-a. A few compilation bugs were fixed in the new extended globbing code.
-
-b. Executing arithmetic commands now sets the command name to `((' so
- error messages look right.
-
-c. Fixed some build problems with various configuration options.
-
-d. The `printf' builtin now aborts immediately if an illegal format
- character is encountered.
-
-e. The code that creates here-documents now behaves better if the file it's
- trying to create already exists for some reason.
-
-f. Fixed a problem with the extended globbing code that made patterns like
- `x+*' expand incorrectly.
-
-g. The prompt string expansion code no longer quotes tildes with backslashes.
-
-h. The bash getcwd() implementation in lib/sh/getcwd.c now behaves better in
- the presence of lstat(2) failures.
-
-i. Fixed a bug with strsub() that caused core dumps when executing `fc -s'.
-
-j. The mail checking code now ensures that it has a valid default mailpath.
-
-k. A bug was fixed that caused local variables to be unset inappropriately
- when sourcing a script from within another sourced script.
-
-l. A bug was fixed in the history saving code so that functions are saved
- in the history list correctly if `cmdhist' is enabled, but `lithist'
- is not.
-
-m. A bug was fixed that caused printf overflows when displaying error
- messages.
-
-n. It should be easier to build the loadble builtins in examples/loadables,
- though some manual editing of the generated Makefile is still required.
-
-o. The user's primary group is now always ${GROUPS[0]}.
-
-p. Some updates were made to support/config.guess from the GNU master copy.
-
-q. Some changes were made to the autoconf support for Solaris 2.6 large
- files.
-
-r. The `command' builtins now does the right thing when confstr(3) cannot
- find a value for _CS_PATH.
-
-s. Extended globbing expressions like `*.!(c)' are not history expanded if
- `extglob' is enabled.
-
-t. Using the `-P' option to `cd' will force the value that is assigned to
- PWD to not contain any symbolic links.
-
-2. Changes to Readline
-
-a. The code that prints completion listings now behaves better if one or
- more of the filenames contains non-printable characters.
-
-b. The time delay when showing matching parentheses is now 0.5 seconds.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.02-alpha1,
-and the previous version, bash-2.01.1-release.
-
-1. Changes to Bash
-
-a. OS-specific configuration changes for: BSD/OS 3.x, Minix 2.x,
- Solaris 2.6, SINIX SVR4.
-
-b. Changes were made to the generated `info' files so that `install-info'
- works correctly.
-
-c. PWD is now auto-exported.
-
-d. A fix was made to the pipeline code to make sure that the shell forks
- to execute simple commands consisting solely of assignment statements.
-
-e. Changes to the test suite for systems with 14-character filenames.
-
-f. The default sizes of some internal hash tables have been made smaller
- to reduce the shell's memory footprint.
-
-g. The `((...))' arithmetic command is now executed directly instead of
- being translated into `let "..."'.
-
-h. Fixes were made to the expansion code so that "$*", "$@", "${array[@]}",
- and "${array[@]}" expand correctly when IFS does not contain a space
- character, is unset, or is set to NULL.
-
-i. The indirect expansion code (${!var}) was changed so that the only
- valid values of `var' are variable names, positional parameters, `#',
- `@', and `*'.
-
-j. An arithmetic expression error in a $((...)) expansion now causes a
- non-interactive shell running in posix mode to exit.
-
-k. Compound array assignment now splits the words within the parentheses
- on shell metacharacters like the parser would before expansing them
- and performing the assignment. This is for compatibility with ksh-93.
-
-l. The internal shell backslash-quoting code (used in the output of `set'
- and completion) now quotes tildes if they appear at the start of the
- string or after a `=' or `:'.
-
-m. A couple of bugs with `shopt -o' were fixed.
-
-n. `bash +o' now displays the same output as `set +o' before starting an
- interactive shell.
-
-o. A bug that caused command substitution and the `eval' builtin to
- occasionally free memory twice when an error was encountered was fixed.
-
-p. The filename globbing code no longer requires read permission for a
- directory when the filename to be matched does not contain any globbing
- characters, as POSIX.2 specifies.
-
-q. A bug was fixed so that the job containing the last asynchronous
- process is not removed from the job table until a `wait' is executed
- for that process or another asynchronous process is started. This
- satisfies a POSIX.2 requirement.
-
-r. A `select' bug was fixed so that a non-numeric user response is treated
- the same as a numeric response that is out of range.
-
-s. The shell no longer parses the value of SHELLOPTS from the environment
- if it is restricted, running setuid, or running in `privileged mode'.
-
-t. Fixes were made to enable large file support on systems such as
- Solaris 2.6, where the size of a file may be larger than can be held
- in an `int'.
-
-u. The filename hashing code was fixed to not add `./' to the beginning of
- filenames which already begin with `./'.
-
-v. The configure script was changed so that the GNU termcap library is not
- compiled in if `prefer-curses' has been specified.
-
-w. HISTCONTROL and HISTIGNORE are no longer applied to the second and
- subsequent lines of a multi-line command.
-
-x. A fix was made to `disown' so that it does a better job of catching
- out-of-range jobs.
-
-y. Non-interactive shells no longer report the status of processes terminated
- due to SIGINT, even if the standard output is a terminal.
-
-z. A bug that caused the output of `jobs' to have extra carriage returns
- was fixed.
-
-aa. A bug that caused PIPESTATUS to not be set when builtins or shell
- functions were executed in the foreground was fixed.
-
-bb. Bash now attempts to detect when it is being run by sshd, and treats
- that case identically to being run by rshd.
-
-cc. A bug that caused `set -a' to export SHELLOPTS when one of the shell
- options was changed was fixed.
-
-dd. The `kill' builtin now disallows empty or missing process id arguments
- instead of treating them as identical to `0', which means the current
- process.
-
-ee. `var=value declare -x var' now behaves identically to
- `var=value export var'. Similarly for `var=value declare -r var' and
- `var=value readonly var'.
-
-ff. A few memory leaks were fixed.
-
-gg. `alias' and `unalias' now print error messages when passed an argument
- that is not an alias for printing or deletion, even when the shell is
- not interactive, as POSIX.2 specifies.
-
-hh. `alias' and `alias -p' now return a status of 0 when no aliases are
- defined, as POSIX.2 specifes.
-
-ii. `cd -' now prints the pathname of the new working directory if the shell
- is interactive.
-
-jj. A fix was made so that the code that binds $PWD now copes with getcwd()
- returning NULL.
-
-kk. `unset' now checks whether or not a function name it's trying to unset
- is a valid shell identifier only when the shell is running in posix mode.
-
-ll. A change was made to the code that generates filenames for here documents
- to make them less prone to name collisions.
-
-mm. The parser was changed so that `time' is recognized as a reserved word
- only at the beginning of a pipeline.
-
-nn. The pathname canonicalization code was changed so that `//' is converted
- into `/', but all other pathnames beginning with `//' are left alone, as
- POSIX.2 specifies.
-
-oo. The `logout' builtin will no longer exit a non-interactive non-login
- shell.
-
-2. Changes to Readline
-
-a. Fixed a problem in the readline test program rltest.c that caused a core
- dump.
-
-b. The code that handles parser directives in inputrc files now displays
- more error messages.
-
-c. The history expansion code was fixed so that the appearance of the
- history comment character at the beginning of a word inhibits history
- expansion for that word and the rest of the input line.
-
-3. New Features in Bash
-
-a. A new version of malloc, based on the older GNU malloc, that has many
- changes, is more page-based, is more conservative with memory usage,
- and does not `orphan' large blocks when they are freed.
-
-b. A new version of gmalloc, based on the old GLIBC malloc, with many
- changes and range checking included by default.
-
-c. A new implementation of fnmatch(3) that includes full POSIX.2 Basic
- Regular Expression matching, including character classes, collating
- symbols, equivalence classes, and support for case-insensitive pattern
- matching.
-
-d. ksh-88 egrep-style extended pattern matching ([@+*?!](patlist)) has been
- implemented, controlled by a new `shopt' option, `extglob'.
-
-e. There is a new ksh-like `[[' compound command, which implements
- extended `test' functionality.
-
-f. There is a new `printf' builtin, implemented according to the POSIX.2
- specification.
-
-g. There is a new feature for command substitution: $(< filename) now expands
- to the contents of `filename', with any trailing newlines removed
- (equivalent to $(cat filename)).
-
-h. There are new tilde prefixes which expand to directories from the
- directory stack.
-
-i. There is a new `**' arithmetic operator to do exponentiation.
-
-j. There are new configuration options to control how bash is linked:
- `--enable-profiling', to allow bash to be profiled with gprof, and
- `--enable-static-link', to allow bash to be linked statically.
-
-k. There is a new configuration option, `--enable-cond-command', which
- controls whether or not the `[[' command is included. It is on by
- default.
-
-l. There is a new configuration option, `--enable-extended-glob', which
- controls whether or not the ksh extended globbing feature is included.
- It is enabled by default.
-
-m. There is a new configuration #define in config.h.top that, when enabled,
- will cause all login shells to source /etc/profile and one of the user-
- specific login shell startup files, whether or not the shell is
- interactive.
-
-n. There is a new invocation option, `--dump-po-strings', to dump
- a shell script's translatable strings ($"...") in GNU `po' format.
-
-o. There is a new `shopt' option, `nocaseglob', to enable case-insensitive
- pattern matching when globbing filenames and using the `case' construct.
-
-p. There is a new `shopt' option, `huponexit', which, when enabled, causes
- the shell to send SIGHUP to all jobs when an interactive login shell
- exits.
-
-q. `bind' has a new `-u' option, which takes a readline function name as an
- argument and unbinds all key sequences bound to that function in a
- specified keymap.
-
-r. `disown' now has `-a' and `-r' options, to limit operation to all jobs
- and running jobs, respectively.
-
-s. The `shopt' `-p' option now causes output to be displayed in a reusable
- format.
-
-t. `test' has a new `-N' option, which returns true if the filename argument
- has been modified since it was last accessed.
-
-u. `umask' now has a `-p' option to print output in a reusable format.
-
-v. A new escape sequence, `\xNNN', has been added to the `echo -e' and $'...'
- translation code. It expands to the character whose ascii code is NNN
- in hexadecimal.
-
-w. The prompt string expansion code has a new `\r' escape sequence.
-
-x. The shell may now be cross-compiled for the CYGWIN32 environment on
- a Unix machine.
-
-4. New Features in Readline
-
-a. There is now an option for `iterative' yank-last-arg handline, so a user
- can keep entering `M-.', yanking the last argument of successive history
- lines.
-
-b. New variable, `print-completions-horizontally', which causes completion
- matches to be displayed across the screen (like `ls -x') rather than up
- and down the screen (like `ls').
-
-c. New variable, `completion-ignore-case', which causes filename completion
- and matching to be performed case-insensitively.
-
-d. There is a new bindable command, `magic-space', which causes history
- expansion to be performed on the current readline buffer and a space to
- be inserted into the result.
-
-e. There is a new bindable command, `menu-complete', which enables tcsh-like
- menu completion (successive executions of menu-complete insert a single
- completion match, cycling through the list of possible completions).
-
-f. There is a new bindable command, `paste-from-clipboard', for use on Win32
- systems, to insert the text from the Win32 clipboard into the editing
- buffer.
-
-g. The key sequence translation code now understands printf-style backslash
- escape sequences, including \NNN octal escapes. These escape sequences
- may be used in key sequence definitions or macro values.
-
-h. An `$include' inputrc file parser directive has been added.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.01.1-release,
-and the previous version, bash-2.01-release.
-
-1. Changes to Bash
-
-a. The select command was fixed to check the validity of the user's
- input more strenuously.
-
-b. A bug was fixed that prevented `time' from timing commands correctly
- when supplied as an argument to `bash -c'.
-
-c. A fix was made to the mail checking code to keep from adding the same
- mail file to the list of files to check multiple times when parsing
- $MAILPATH.
-
-d. Fixed an off-by-one error in the tilde expansion library.
-
-e. When using the compound array assignment syntax, the old value of
- the array is cleared before assigning the new value.
-
-f. Fixed a bug that could cause a core dump when a trap handler was reset
- to the default in the trap command associated with that signal.
-
-g. Fixed a bug in the locale code that occurred when assigning a value
- to LC_ALL.
-
-h. A change was made to the parser so that words of the form xxx=(...)
- are not considered compound assignment statements unless there are
- characters before the `='.
-
-i. A fix was made to the command tracing code to correctly quote each
- word of output.
-
-j. Some changes were made to the bash-specific autoconf tests to make them
- more portable.
-
-k. Completion of words with globbing characters now correctly quotes the
- result.
-
-l. The directory /var/spool/mail is now preferred to /usr/spool/mail when
- configure is deciding on the default mail directory.
-
-m. The brace completion code was fixed to not quote the `{' and `}'.
-
-n. Some fixes were made to make $RANDOM more random in subshells.
-
-o. System-specific changes were made to configure for: SVR4.2
-
-p. Changes were made so that completion of words containing globbing chars
- substitutes the result only if a single filename was matched.
-
-q. The window size is now recomputed after a job is stopped with SIGTSTP if
- the user has set `checkwinsize' with `shopt'.
-
-r. When doing substring expansion, out-of-range substring specifiers now
- cause nothing to be substituted rather than an expansion error.
-
-s. A fix was made so that you can no longer trap `SIGEXIT' or `SIGDEBUG' --
- only `EXIT' and `DEBUG' are accepted.
-
-t. The display of trapped signals now uses the signal number if signals
- for which bash does not know the name are trapped.
-
-u. A fix was made so that `bash -r' does not turn on restricted mode until
- after the startup files are executed.
-
-v. A bug was fixed that occasionally caused a core dump when a variable
- found in the temporary environment of export/declare/readonly had a
- null value.
-
-w. A bug that occasionally caused unallocated memory to be passed to free()
- when doing arithmetic substitution was fixed.
-
-x. A bug that caused a buffer overrun when expanding a prompt string
- containing `\w' and ${#PWD} exceeded PATH_MAX was fixed.
-
-y. A problem with the completion code that occasionally caused it to
- refer to a character before the beginning of the readline line buffer
- was fixed.
-
-z. A bug was fixed so that the `read' builtin restarts reads when
- interrupted by signals other than SIGINT.
-
-aa. Fixed a bug that caused a command to be freed twice when there was
- an evaluation error in the `eval' command.
-
-2. Changes to Readline
-
-a. Added a missing `extern' to a declaration in readline.h that kept
- readline from compiling cleanly on some systems.
-
-b. The history file is now opened with mode 0600 when it is written for
- better security.
-
-c. Changes were made to the SIGWINCH handling code so that prompt redisplay
- is done better.
-
-d. ^G now interrupts incremental searches correctly.
-
-e. A bug that caused a core dump when the set of characters to be quoted
- when completing words was empty was fixed.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.01-release,
-and the previous version, bash-2.01-beta2.
-
-1. Changes to Bash
-
-a. The `distclean' target should remove the `printenv' executable if it
- has been created.
-
-b. The test suite was changed slightly to ensure that the error messages
- are printed in English.
-
-c. A bug that caused the shell to dump core when a filename containing a
- `/' was passed to `hash' was fixed.
-
-d. Pathname canonicalization now leaves a leading `//' intact, as POSIX.1
- requires.
-
-e. A memory leak when completing commands was fixed.
-
-f. A memory leak that occurred when checking the hash table for commands
- with relative paths was fixed.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.01-beta2,
-and the previous version, bash-2.01-beta1.
-
-1. Changes to Bash
-
-a. The `ulimit' builtin translates RLIM_INFINITY to the hard limit only if
- the current (soft) limit is less than or equal to the hard limit.
-
-b. Fixed a bug that caused the bash emulation of strcasecmp to produce
- incorrect results.
-
-c. A bug that caused memory to be freed twice when a trap handler resets
- the trap more than once was fixed.
-
-d. A bug that caused machines where sizeof (pointer) > sizeof (int) to
- fail (and possibly dump core) when trying to unwind-protect a null
- pointer was fixed.
-
-e. The startup files should not be run with job control enabled. This fix
- allows SIGINT to once again interrupt startup file execution.
-
-f. Bash should not change the SIGPROF handler if it is set to something
- other than SIG_DFL.
-
-g. The completion code that provides bash-specific completions for readline
- now quotes characters that the readline code would treat as word break
- characters if they appear in a file name.
-
-h. The completion code now correctly quotes filenames containing a `!',
- even if the user attempted to use double quotes when attempting
- completion.
-
-i. A bug that caused the shell to dump core when `disown' was called without
- arguments and there was no current job was fixed.
-
-j. A construct like $((foo);bar) is now processed as a command substitution
- rather than as a bad arithmetic substitution.
-
-k. A couple of bugs that caused `fc' to not obey the `cmdhist' and `lithist'
- shell options when editing and re-executing a series of commands were
- fixed.
-
-l. A fix was made to the grammar -- the list of commands between `do' and
- `done' in the body of a `for' command should be treated the same as a
- while loop.
-
-2. Changes to Readline
-
-a. A couple of bugs that caused the history search functions to attempt to
- free a NULL pointer were fixed.
-
-b. If the C library provides setlocale(3), readline does not need to look
- at various environment variables to decide whether or not to go into
- eight-bit mode automatically -- just check whether the current locale
- is not `C' or `POSIX'.
-
-c. If the filename completion function finds that a directory was not closed
- by a previous (interrupted) completion, it closes the directory with
- closedir().
-
-3. New Features in Bash
-
-a. New bindable readline commands: history-and-alias-expand-line and
- alias-expand-line. The code was always in there, there was just no
- way to execute it.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.01-beta1,
-and the previous version, bash-2.01-alpha1.
-
-1. Changes to Bash
-
-a. Fixed a problem that could cause file descriptors used for process
- substitution to conflict with those used explicitly in redirections.
-
-b. Made it easier to regenerate configure if the user changes configure.in.
-
-c. ${GROUPS[0]} should always be the primary group, even on systems without
- multiple groups.
-
-d. Spelling correction is no longer enabled by default.
-
-e. Fixes to quoting problems in `bashbug'.
-
-f. OS-specific configuration changes were made for: Irix 6.
-
-g. OS-specific code changes were made for: QNX.
-
-h. A more meaningful message is now printed when the file in /tmp for a
- here document cannot be created.
-
-i. Many changes to the shell's variable initialization code to speed
- non-interactive startup.
-
-j. Changes to the non-job-control code so that it does not try to open
- /dev/tty.
-
-k. The output of `set' and `export' is once again sorted, as POSIX wants.
-
-l. Fixed a problem caused by a recursive call reparsing the value of
- $SHELLOPTS.
-
-m. The tilde code no longer calls getenv() when it's compiled as part of
- the shell, which should eliminate problems on systems that cannot
- redefine getenv(), like the NeXT OS.
-
-n. Fixed a problem that caused `bash -o' or `bash +o' to not list all
- the shell options.
-
-o. Fixed `ulimit' to convert RLIM_INFINITY to the appropriate hard limit
- only if the hard limit is greater than the current (soft) limit.
-
-p. Fixed a problem that arose when building bash in a different directory
- than the source and y.tab.[ch] were remade with something other than
- bison. This came up most often on NetBSD.
-
-q. Fixed a problem with completion -- it thought that `pwd`/[TAB] indicated
- an unfinished command completion (`/), which generated errors.
-
-r. The bash special tilde expansions (~-, ~+) are now attempted before
- calling the standard tilde expansion code, which should eliminate the
- problems people have been seeing with this on Solaris 2.5.1.
-
-s. Added support for <stdarg.h> to places where it was missing.
-
-t. Changed the code that reads the output of a command substitution to not
- go through stdio. This reduces the memory requirements and is faster.
-
-u. A number of changes to speed up export environment creation were made.
-
-v. A number of memory leaks were fixed as the result of running the test
- scripts through Purify.
-
-w. Fixed a bug that caused subshells forked to interpret executable
- scripts without a leading `#!' to not reinitialize the values of
- the shell options.
-
-2. Changes to Readline
-
-a. History library has less `#ifdef SHELL' code -- abstracted stuff out
- into application-specific function hooks.
-
-b. Readline no longer calls getenv() if it's compiled as part of the shell,
- which should eliminate problems on systems that cannot redefine getenv(),
- like the NeXT OS.
-
-c. Fixed translation of ESC when `untranslating' macro values.
-
-d. The region kill operation now fixes the mark if it ends up beyond the
- boundaries of the line after the region is deleted.
-
-3. New Features in Bash
-
-a. New argument for `configure': `--with-curses'. This can be used to
- override the selection of the termcap library on systems where it is
- deficient.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.01-alpha1,
-and the previous version, bash-2.0-release.
-
-1. Changes to Bash
-
-a. System-specific configuration changes for: FreeBSD, SunOS4, Irix,
- MachTen, QNX 4.2, Harris Night Hawk, SunOS5.
-
-b. System-specific code changes were made for: Linux, 4.4 BSD, QNX 4.2,
- HP-UX, AIX 4.2.
-
-c. A bug that caused the exec builtin to fail because the full pathname of
- the command could not be found was fixed.
-
-d. The code that performs output redirections is now more resistant to
- race conditions and possible security exploits.
-
-e. A bug that caused the shell to dump core when performing pattern
- substitutions on variable values was fixed.
-
-f. More hosts are now recognized by the auto-configuration mechanism
- (OpenBSD, QNX, others).
-
-g. Assignments to read-only variables that attempt to convert them to
- arrays are now errors.
-
-h. A bug that caused shell scripts using array assignments in POSIX mode
- to exit after the assignment was performed was fixed.
-
-i. The substring expansion code is now more careful about running off the
- ends of the expanded variable value.
-
-j. A bug that caused completion to fail if a backquoted command substitution
- appeared anywhere on the line was fixed.
-
-k. The `source' builtin no longer turns off history if it has been enabled
- in a non-interactive shell.
-
-l. A bug that caused the shell to crash when `disown' was given a pid
- instead of a job number was fixed.
-
-m. The `cd' spelling correction code will not try to change to `.' if no
- directory entries match a single-character argument.
-
-n. A bad variable name supplied to `declare', `export', or `readonly' no
- longer causes a non-interactive shell in POSIX mode to exit.
-
-o. Some fixes were made to the test suite to handle peculiarities of
- various Unix versions.
-
-p. The bash completion code now quotes characters that readline would
- treat as word breaks for completion but are not shell metacharacters.
-
-q. Bad options supplied at invocation now cause a usage message to be
- displayed.
-
-r. Fixes were made to the code that handles DEBUG traps so that the trap
- string is not freed inappropriately.
-
-s. Some changes were made to the bash debugger in examples/bashdb -- it
- should be closer to working now.
-
-t. A problem that caused the default filename used for mail checking to be
- wrong was fixed.
-
-u. A fix was made to the `echo' builtin so that NUL characters printed with
- `echo -e' do not cause the output to be truncated.
-
-v. A fix was made to the job control code so that the shell behaves better
- when monitor mode is enabled in a non-interactive shell.
-
-w. Bash no longer catches all of the terminating signals in a non-
- interactive shell until a trap is set on EXIT, which should result in
- quicker startup.
-
-x. A fix was made to the command timing code so that `time' can be used in
- a loop.
-
-y. A fix was made to the parser so that `((cmd); cmd2)' is now parsed as
- a nested subshell rather than strictly as an (erroneous) arithmetic
- command.
-
-z. A fix was made to the globbing code so that it correctly matches quoted
- filenames beginning with a `.'.
-
-aa. A bug in `fc' that caused some multi-line commands to not be stored as
- one command in the history when they were re-executed after editing
- (with `fc -e') was fixed.
-
-bb. The `ulimit' builtin now attempts to catch some classes of integer
- overflows.
-
-cc. The command-oriented-history code no longer attempts to add `;'
- inappropriately when a newline appears while reading a $(...) command
- substitution.
-
-dd. A bug that caused the shell to dump core when `help --' was executed
- was fixed.
-
-ee. A bug that caused the shell to crash when an unset variable appeared
- in the body of a here document after `set -u' had been executed was
- fixed.
-
-ff. Implicit input redirections from /dev/null for asynchronous commands
- are now handled better.
-
-gg. A bug that caused the shell to fail to compile when configured with
- `--disable-readline' was fixed.
-
-hh. The globbing code should now be interruptible.
-
-ii. Bash now notices when the `kill' builtin is used to send SIGCONT to a
- stopped job and adjusts the data structures accordingly, as if `bg' had
- been executed instead.
-
-jj. A bug that caused the shell to crash when mixing calls to `getopts'
- and `shift' on the same set of positional parameters was fixed.
-
-kk. The command printing code now preserves the `-p' flag to `time'.
-
-ll. The command printing code now handles here documents better when there
- are other redirections associated with the command.
-
-mm. The special glibc environment variable (NNN_GNU_nonoption_argv_flags_)
- is no longer placed into the environment of executed commands -- users
- of glibc had too many problems with it.
-
-nn. Reorganized the code that generates signames.h. The signal_names list
- is now more complete but may be slightly different (SIGABRT is favored
- over SIGIOT, for example). The preferred signal names are those
- listed in the POSIX.2 standard.
-
-oo. `bashbug' now uses a filename shorter than 14 characters for its
- temporary file, and asks for confirmation before sending the bug
- report.
-
-pp. A bug that caused TAB completion in vi editing mode to not be turned
- off when `set -o posix' was executed or back on when `set +o posix'
- was executed was fixed.
-
-qq. A bug in the brace expansion code that caused brace expansions appearing
- in new-style $(...) command substitutions to be inappropriately expanded
- was fixed.
-
-rr. A bug in the readline hook shell-expand-line that could cause memory to
- be inappropriately freed was fixed.
-
-ss. A bug that caused some arithmetic expressions containing `&&' and `||'
- to be parsed with the wrong precedence has been fixed.
-
-tt. References to unbound variables after `set -u' has been executed now
- cause the shell to exit immediately, as they should.
-
-uu. A bug that caused the shell to exit inappropriately when `set -e' had
- been executed and a command's return status was being inverted with the
- `!' reserved word was fixed.
-
-vv. A bug that could occasionally cause the shell to crash with a
- divide-by-zero error when timing a command was fixed.
-
-ww. A bug that caused parameter pattern substitution to leave stray
- backslashes in the replacement string when the expression is in
- double quotes was fixed.
-
-xx. The `break' and `continue' builtins now break out of all loops when an
- invalid count argument is supplied.
-
-yy. Fixed a bug that caused PATH to be set to the empty string if
- `command -p' is executed with PATH unset.
-
-zz. Fixed `kill -l signum' to print the signal name without the `SIG' prefix,
- as POSIX specifies.
-
-aaa. Fixed a bug that caused the shell to crash while setting $SHELLOPTS
- if there were no shell options set.
-
-bbb. Fixed `export -p' and `readonly -p' so that when the shell is in POSIX
- mode, their output is as POSIX.2 specifies.
-
-ccc. Fixed a bug in `readonly' so that `readonly -a avar=(...)' actually
- creates an array variable.
-
-ddd. Fixed a bug that prevented `time' from correctly timing background
- pipelines.
-
-2. Changes to Readline
-
-a. A bug that caused an extra newline to be printed when the cursor was on
- an otherwise empty line was fixed.
-
-b. An instance of memory being used after it was freed was corrected.
-
-c. The redisplay code now works when the prompt is longer than the screen
- width.
-
-d. `dump-macros' is now a bindable name, as it should have been all along.
-
-e. Non-printable characters are now expanded when displaying macros and
- their values.
-
-f. The `dump-variables' and `dump-macros' commands now output a leading
- newline if they're called as the result of a key sequence, rather
- than directly by an application.
-
-3. New Features in Bash
-
-a. There is a new builtin array variable: GROUPS, the set of groups to which
- the user belongs. This is used by the test suite.
-
-4. New Features in Readline
-
-a. If a key sequence bound to `universal-argument' is read while reading a
- numeric argument started with `universal-argument', it terminates the
- argument but is otherwise ignored. This provides a way to insert multiple
- instances of a digit string, and is how GNU emacs does it.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.0-release,
-and the previous version, bash-2.0-beta3.
-
-1. Changes to Bash
-
-a. Fix to the `getopts' builtin so that it does the right thing when a
- required option argument is not present.
-
-b. The completion code now updates the common prefix of matched names
- after FIGNORE processing is done, since any names that were removed
- may have changed the common prefix.
-
-c. Fixed a bug that made messages in MAILPATH entries not work correctly.
-
-d. Fixed a serious documentation error in the description of the new
- ${parameter:offset[:length]} expansion.
-
-e. Fixes to make parameter substring expansion ({$param:offset[:length]})
- work when within double quotes.
-
-f. Fixes to make ^A (CTLESC) survive an unquoted expansion of positional
- parameters.
-
-g. Corrected a misspelling of `unlimited' in the output of `ulimit'.
-
-h. Fixed a bug that caused executable scripts without a leading `#!' to
- occasionally pick up the wrong set of positional parameters.
-
-i. Linux systems now have a working `ulimit -v', using RLIMIT_AS.
-
-j. Updated config.guess so that many more machine types are recognized.
-
-k. Fixed a bug with backslash-quoted slashes in the ${param/pat[/sub]}
- expansion.
-
-l. If the shell is named `-su', and `-c command' is supplied, read and
- execute the login shell startup files even though the shell is not
- interactive. This is to support the `-' option to `su'.
-
-m. Fixed a bug that caused core dumps when the DEBUG trap was ignored
- with `trap "" DEBUG' and a shell function was subsequently executed.
-
-n. Fixed a bug that caused core dumps in the read builtin when IFS was
- set to the null string and the input had leading whitespace.
-
-2. Changes to Readline
-
-a. Fixed a bug that caused a numeric argument of 1024 to be ignored when
- inserting text.
-
-b. Fixed the display code so that the numeric argument is displayed as it's
- being entered.
-
-c. Fixed the numeric argument reading code so that `M-- command' is
- equivalent to `M--1 command', as the prompt implies.
-
-3. New Features in Bash
-
-a. `ulimit' now sets both hard and soft limits and reports the soft limit
- by default (when neither -H nor -S is specified). This is compatible
- with versions of sh and ksh that implement `ulimit'.
-
-b. Integer constants have been extended to base 64.
-
-4. New Features in Readline
-
-a. The `home' and `end' keys are now bound to beginning-of-line and
- end-of-line, respectively, if the corresponding termcap capabilities
- are present.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.0-beta3,
-and the previous version, bash-2.0-beta2.
-
-1. Changes to Bash
-
-a. System-specific changes for: AIX 4.2, SCO 3.2v[45], HP-UX.
-
-b. When in POSIX mode, variable assignments preceding a special builtin
- persist in the shell environment after the builtin completes.
-
-c. Changed all calls to getwd() to getcwd(). Improved check for systems
- where the libc getcwd() calls popen(), since that breaks on some
- systems when job control is being used.
-
-d. Fixed a bug that caused seg faults when executing scripts with the
- execute bit set but without a leading `#!'.
-
-e. The environment passed to executed commands is never sorted.
-
-f. A bug was fixed in the code that expands ${name[@]} to the number of
- elements in an array variable.
-
-g. A bug was fixed in the array compound assignment code ( A=( ... ) ).
-
-h. Window size changes now correctly propagate down to readline if
- the shopt `checkwinsize' option is enabled.
-
-i. A fix was made in the code that expands to the length of a variable
- value (${#var}).
-
-j. A fix was made to the command builtin so that it did not turn on the
- `no fork' flag inappropriately.
-
-k. A fix was made to make `set -n' work more reliably.
-
-l. A fix was made to the job control initialization code so that the
- terminal process group is set to the shell's process group if the
- shell changes its own process group.
-
-2. Changes to Readline
-
-a. System-specific changes for: SCO 3.2v[45].
-
-b. The behavior of the vi-mode `.' when redoing an `i' command was changed
- to insert the text previously inserted by the `i' command rather than
- simply entering insert mode.
-
-3. New features in Bash
-
-a. There is a new version of the autoload function package, in
- examples/functions/autoload.v2, that uses arrays and provides more
- functionality.
-
-b. Support for LC_COLLATE and locale-specific sorting of the results of
- pathname expansion if strcoll() is available.
-
-4. New Features in Readline
-
-a. Support for locale-specific sorting of completion possibilities if
- strcoll() is available.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.0-beta2,
-and the previous version, bash-2.0-beta1.
-
-1. Changes to Bash
-
-a. `pushd -' is once again equivalent to `pushd $OLDPWD'.
-
-b. OS-specific changes for: SCO 3.2v[45].
-
-c. A change was made to the fix for the recently-reported security hole
- when reading characters with octal value 255 to make it work better on
- systems with restartable system calls when not using readline.
-
-d. Some changes were made to the test suite so that it works if you
- configure bash with --enable-usg-echo-default.
-
-e. A fix was made to the parsing of conditional arithmetic expressions.
-
-f. Illegal arithmetic bases now cause an arithmetic evaluation error rather
- than being silently reset.
-
-g. Multiple arithmetic bases now cause an arithmetic evaluation error
- instead of being ignored.
-
-h. A fix was made to the evaluation of ${param?word} to conform to POSIX.2.
-
-i. A bug that sometimes caused array indices to be evaluated twice (which
- would cause errors when they contained assignment statements) was fixed.
-
-j. `ulimit' was rewritten to avoid problems with getrlimit(2) returning
- unsigned values and to simplify the code.
-
-k. A bug in the command-oriented-history code that caused it to sometimes
- put semicolons after right parens inappropriately was fixed.
-
-l. The values inserted into the prompt by the \w and \W escape sequences
- are now quoted to prevent further expansion.
-
-m. An interactive shell invoked as `sh' now reads and executes commands
- from the file named by $ENV when it starts up. If it's a login shell,
- it does this after reading /etc/profile and ~/.profile.
-
-n. The file named by $ENV is never read by non-interactive shells.
-
-2. Changes to Readline
-
-a. A few changes were made to hide some macros and functions that should not
- be public.
-
-b. An off-by-one error that caused seg faults in the history expansion code
- was fixed.
-
-3. New Features in Bash
-
-a. The ksh-style ((...)) arithmetic command was implemented. It is exactly
- identical to let "...". This is controlled by a new option to configure,
- `--enable-dparen-arithmetic', which is on by default.
-
-b. There is a new #define available in config.h.top: SYS_BASH_LOGOUT. If
- defined to a filename, bash reads and executes commands from that file
- when a login shell exits. It's commented out by default.
-
-c. `ulimit' has a `-l' option that reports the maximum amount of data that
- may be locked into memory on 4.4BSD-based systems.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.0-beta1,
-and the previous version, bash-2.0-alpha4.
-
-1. Changes to Bash
-
-a. A bug that sometimes caused traps to be ignored on signals the
- shell treats specially was fixed.
-
-b. The internationalization code was changed to track the values of
- LC_* variables and call setlocale() as appropriate. The TEXTDOMAIN
- and TEXTDOMAINDIR variables are also tracked; changes cause calls
- to textdomain() and bindtextdomain(), if available.
-
-c. A bug was fixed that sometimes caused double-quoted strings to be
- parsed incorrectly.
-
-d. Changes were made so that the siglist code compiles correctly on
- Solaris 2.5.
-
-e. Added `:' to the set of characters that cause word breaks for the
- completion code so that pathnames in assignments to $PATH can be
- completed.
-
-f. The `select' command was fixed to print $PS3 to stderr.
-
-g. Fixed an error in the manual page section describing the effect that
- setting and unsetting GLOBIGNORE has on the setting of the `dotglob'
- option.
-
-h. The time conversion code now uses CLK_TCK rather than CLOCKS_PER_SEC
- on systems without gettimeofday() and resources.
-
-i. The getopt static variables are now initialized each time a subshell
- is started, so subshells using `getopts' work right.
-
-j. A sign-extension bug that caused a possible security hole was fixed.
-
-k. The parser now reads characters between backquotes within a double-
- quoted string as a single word, so double quotes in the backquoted
- string don't terminate the enclosing double-quoted string.
-
-l. A bug that caused `^O' to work incorrectly when typed as the first
- thing to an interactive shell was fixed.
-
-m. A rarely-exercised off-by-one error in the code that quotes variable
- values was fixed.
-
-n. Some memory and file descriptor leaks encountered when running a
- shell script that is executable but does not have a leading `#!'
- were plugged.
-
-2. Changes to Readline
-
-a. A bug that sometimes caused incorrect results when trying to read
- typeahead on systems without FIONREAD was fixed.
-
-3. New Features in Bash
-
-a. The command timing code now uses the value of the TIMEFORMAT variable
- to format and display timing statistics.
-
-b. The `time' reserved word now accepts a `-p' option to force the
- POSIX.2 output format.
-
-c. There are a couple of new and updated scripts to convert csh startup
- files to bash format.
-
-d. There is a new builtin array variable: BASH_VERSINFO. The various
- members hold the parts of the version information in BASH_VERSION,
- plus the value of MACHTYPE.
-
-4. New Features in Readline
-
-a. Setting LANG to `en_US.ISO8859-1' now causes readline to enter
- eight-bit mode.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.0-alpha4,
-and the previous version, bash-2.0-alpha3.
-
-1. Changes to Bash
-
-a. There is better detection of rsh connections on Solaris 2.
-
-b. Assignments to read-only variables preceding a command name are now
- variable assignment errors. Variable assignment errors cause
- non-interactive shells running in posix mode to exit.
-
-c. The word tokenizer was rewritten to handle nested quotes and pairs
- ('', "", ``, ${...}, $(...), $[...], $'...', $"...", <(...), >(...))
- correctly. Some of the parameter expansion code was updated as a
- consequence.
-
-d. A fix was made to `test' when given three arguments so that a binary
- operator is checked for first, before checking that the first argument
- is `!'.
-
-e. 2''>/dev/null is no longer equivalent to 2>/dev/null.
-
-f. Parser error messages were regularized, and in most cases the name of
- the shell script being read by a non-interactive shell is not printed
- twice.
-
-g. A fix was made to the completion code so that it no longer removes the
- text the user typed in some cases.
-
-h. The special glibc `getopt' environment variable is no longer put into
- the environment on machines with small values of ARG_MAX.
-
-i. The expansion of ${...} now follows the POSIX.2 rules for finding the
- closing `}'.
-
-j. The shell no longer displays spurious status messages for background
- jobs in shell scripts that complete successfully when the script is
- run from a terminal.
-
-k. `shopt -o' now correctly updates $SHELLOPTS.
-
-l. A bug that caused the $PATH searching code to return a non-executable
- file even when an executable file with the same name appeared later in
- $PATH was fixed.
-
-m. The shell now does tilde expansions on unquoted `:~' in assignment
- statements when not in posix mode.
-
-n. Variable assignment errors when a command consists only of assignments
- now cause non-interactive shells to exit when in posix mode.
-
-o. If the variable in a `for' or `select' command is read-only, or not a
- legal shell identifier, a variable assignment error occurs.
-
-p. `test' now handles `-a' and `-o' as binary operators when three arguments
- are supplied, and correctly parses `( word )' as equivalent to `word'.
-
-q. `test' was fixed so that file names of the form /dev/fd/NN mean the same
- thing on all systems, even Linux.
-
-r. Fixed a bug in the globbing code that caused patterns with multiple
- consecutive `*'s to not be matched correctly.
-
-s. Fixed a bug that caused $PS2 to not be printed when an interactive shell
- not using readline is reading a here document.
-
-t. Fixed a bug that caused history expansion to be performed inappropriately
- when a single-quoted string spanned more than one line.
-
-u. `getopts' now checks that the variable name passed by the user as the
- second argument is a legal shell identifier and that the variable is
- not read-only.
-
-v. Fixed `getopts' to obey POSIX.2 rules for setting $OPTIND when it
- encounters an error.
-
-w. Fixed `set' to display variable values in a form that can be re-read.
-
-x. Fixed a bug in the code that keeps track of whether or not local variables
- have been declared at the current level of function nesting.
-
-y. Non-interactive shells in posix mode now exit if the name in a function
- declaration is not a legal identifier.
-
-z. The job control code now ignores stopped children when the shell is not
- interactive.
-
-aa. The `cd' builtin no longer attempts spelling correction on the directory
- name if the shell is not interactive, regardless of the setting of the
- `cdspell' option.
-
-bb. Some OS-specific changes were made for SCO 3.2v[45] and AIX 4.2.
-
-cc. `time' now prints its output to stderr, as POSIX.2 specifies.
-
-2. Fixes to Readline
-
-a. After printing possible completions, all lines of a multi-line prompt
- are redisplayed.
-
-b. Some changes were made to the terminal handling code in rltty.c to
- work around AIX 4.2 bugs.
-
-3. New Features in Bash
-
-a. There is a new loadable builtin: sprintf, with calling syntax
- sprintf var format [args]
- This provides an easy way to simulate ksh left- and right-justified
- variable values.
-
-b. The expansions of \h and \H in prompt strings were swapped. \h now
- expands to the hostname up to the first `.', as in bash-1.14.
-
-4. New Features in Readline
-
-a. The bash-1.14 behavior when ^M is typed while doing an incremental
- search was restored. ^J may now be used to terminate the search without
- accepting the line.
-
-b. There is a new bindable variable: disable-completion. This inhibits
- word completion and causes the completion character to be inserted as
- if it had been bound to self-insert.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-2.0-alpha3,
-and the previous version, bash-2.0-alpha2.
-
-There is now a file `COMPAT' included in the distribution that lists the
-user-visible incompatibilities between 1.14 and 2.0.
-
-1. Changes to Bash
-
-a. Some work was done so that word splitting of the rhs of assignment
- statements conforms more closely to historical practice.
-
-b. A couple of errant memory frees were fixed.
-
-c. A fix was made to the test builtin so it recognizes `<' and `>' as
- binary operators.
-
-d. The GNU malloc in lib/malloc/malloc.c now scrambles memory as it's
- allocated and freed. This is to catch callers that refer to freed
- memory or assume something about newly-allocated memory.
-
-e. Fixed a problem with conversion to 12-hour time in the prompt
- expansion code.
-
-f. Fixed a problem with configure's argument parsing order. Now you can
- correctly turn on specific options after using --enable-minimal-config.
-
-g. The configure script now automatically disables the use of GNU malloc
- on systems where it's appropriate (better than having people read the
- NOTES file and do it manually).
-
-h. There are new prompt expansions (\v and \V) to insert version information
- into the prompt strings.
-
-i. The default prompt string now includes the version number.
-
-j. Most of the builtins that take no options were changed to use the
- internal getopt so they can produce proper error messages for -?
- and incorrect options.
-
-k. Some system-specific changes were made for SVR4.2 and Solaris 2.5.
-
-l. Bash now uses PATH_MAX instead of MAXPATHLEN and NAME_MAX instead of
- MAXNAMLEN.
-
-m. A couple of problems caused by uninitialized variables were fixed.
-
-n. There are a number of new loadable builtin examples: logname, basename,
- dirname, tty, pathchk, tee, head, and rmdir. All of these conform to
- POSIX.2.
-
-o. Bash now notices changes in TZ and calls tzset() if present, so
- changing TZ will alter the time printed by prompt expansions.
-
-p. The source was reorganized a bit so I don't have to wait so long for
- some files to compile, and to facilitate the creation of a `shell
- library' at some future point.
-
-q. Bash no longer turns off job control if called as `sh', since the
- POSIX.2 spec includes job control as a standard feature.
-
-r. `bash -o posix' now works as intended.
-
-s. Fixed a problem with the completion code: when completing a filename
- that contained globbing characters, if show-all-if-ambiguous was set,
- the completion code would remove the user's text.
-
-t. Fixed ulimit so that (hopefully) the full range of limits is available
- on HPUX systems.
-
-u. A new `shopt' option (`hostcomplete') enables and disables hostname
- completion.
-
-v. The shell no longer attempts to save the history on an abort(),
- which is usually called by programming_error().
-
-w. The `-s' option to `fc' was changed to echo the command to be executed
- to stderr instead of stdout.
-
-x. If the editor invoked by `fc -e' exits with a non-zero status, no
- commands are executed.
-
-y. Fixed a bug that made the shopt `histverify' option work incorrectly.
-
-z. There is a new variable `MACHTYPE' whose value is the GNU-style
- `cpu-company-system' system description as set by configure. (The
- values of MACHTYPE and HOSTTYPE should really be swapped.)
-
-aa. The `ulimit' builtin now allows the maximum virtual memory size to be
- set via setrlimit(2) if RLIMIT_VMEM is defined.
-
-bb. `bash -nc 'command'' no longer runs `command'.
-
-2. Changes to Readline
-
-a. Fixed a typo in the code that checked for FIONREAD in input.c.
-
-b. Fixed a bug in the code that outputs keybindings, so things like C-\
- are quoted properly.
-
-c. Fixed a bug in the inputrc file parsing code to handle the problems
- caused by inputrc files created from the output of `bind -p' in
- previous versions of bash. The problem was due to the bug fixed
- in item b above.
-
-d. Readline no longer turns off the terminal's meta key, and turns it on
- once the first time it's called.
-
-------------------------------------------------------------------------------
-This file documents the changes between this version, bash-2.0-alpha2,
-and the previous version, bash-2.0-alpha.
-
-1. Changes to Bash
-
-a. The shell no longer thinks directories are executable.
-
-b. `disown' has a new option, `h', which inhibits the resending of SIGHUP
- but does not remove the job from the jobs table.
-
-c. The varargs functions in error.c now use ANSI-C `stdarg' if available.
-
-d. The build process now treats the `build version' in .build as local to
- the build directory, so different versions built from the same source
- tree have different `build versions'.
-
-e. Some problems with the grammar have been fixed. (It used `list' in a few
- productions where `compound_list' was needed. A `list' must be terminated
- with a newline or semicolon; a `compound_list' need not be.)
-
-f. A fix was made to keep `wait' from hanging when waiting for all background
- jobs.
-
-g. `bash --help' now writes its output to stdout, like the GNU Coding Standards
- specify, and includes the machine type (the value of MACHTYPE).
-
-h. `bash --version' now prints more information and exits successfully, like
- the GNU Coding Standards specify.
-
-i. The output of `time' and `times' now prints fractional seconds with three
- places after the decimal point.
-
-j. A bug that caused process substitutions to screw up the pipeline printed
- by `jobs' was fixed.
-
-k. Fixes were made to the code that implements $'...' and $"..." so they
- work as documented.
-
-l. The process substitution code now opens named pipes for reading with
- O_NONBLOCK to avoid hanging.
-
-m. Fixes were made to the trap code so the shell cleans up correctly if the
- trap command contains a `return' and we're executing a function or
- sourcing a script with `.'.
-
-n. Fixes to doc/Makefile.in so that it doesn't try to remake all of the
- documentation (ps, dvi, etc.) on a `make install'.
-
-o. Fixed an auto-increment error that caused bash -c args to sometimes dump
- core.
-
-p. Fixed a bug that caused $HISTIGNORE to fail when the history line
- contained globbing characters.
-
-2. Changes to Readline
-
-a. There is a new string variable, rl_library_version, available for use by
- applications. The current value is "2.1".
-
-b. A bug encountered when expand-tilde was enabled and file completion was
- attempted on a word beginning with `~/' was fixed.
-
-c. A slight change was made to the incremental search termination behavior.
- ESC still terminates the search, but if input is pending or arrives
- within 0.1 seconds (on systems with select(2)), it is used as a prefix
- character. This is intented to allow users to terminate searches with
- the arrow keys and get the behavior they expect.
+++ /dev/null
- 7/27/2004
- ---------
-
-[bash-3.0 released]
-
- 7/28
- ----
-array.c
- - in array_insert(), make sure the value to be added is non-NULL before
- calling savestring() on it
-
-builtins/reserved.def
- - fix description of `CDPATH'
-
-lib/readline/display.c
- - when expanding a prompt that spans multiple lines with embedded
- newlines, set prompt_physical_chars from the portion after the
- final newline, not the preceding portion. Bug reported by
- "Ralf S. Engelschall" <rse@engelschall.com>
-
-make_cmd.c
- - explicitly declare `lineno' in function prologue for make_case_command
-
-builtins/evalfile.c
- - include `trap.h' for declaration for run_return_trap
-
-bashline.c
- - fix a `return' without a value in enable_hostname_completion
-
-general.c
- - include test.h for extern declaration for test_eaccess
-
-externs.h
- - add declaration for zcatfd
-
-tests/{history,histexp}.tests
- - unset HISTFILESIZE to avoid problems if a value of 0 is inherited
- from the environment
-
- 7/30
- ----
-bashline.c
- - small changes to glob_expand_word to perform tilde expansion before
- attempting globbing
-
-builtins/Makefile.in
- - fix the install-help target to not cd into the `helpfiles'
- subdirectory, so a value of $INSTALL_DATA containing a relative
- pathname (e.g., .././support/install.sh) remains valid
-
- 7/31
- ----
-subst.c
- - new function, mbstrlen(s), returns length of a multibyte character
- string
-
-include/shmbutil.h
- - new macro, MB_STRLEN(s), calls mbstrlen or STRLEN as appropriate
-
-builtins/trap.def
- - small change so that a first argument that's a valid signal number
- (digits only -- no symbolic names) will be treated as a signal and
- reverted back to the original handling disposition. Fixes debian
- complaints
-
-subst.c
- - call MB_STRLEN instead of STRLEN where appropriate in
- parameter_brace_expand_length to handle multibyte characters properly
- - call MB_STRLEN instead of strlen in verify_substring_values so that
- negative substrings of strings with multibyte chars work properly
-
- 8/1
- ---
-jobs.c
- - describe_pid needs to write to stderr, not stdout (POSIX)
- - start_job, since it's only used by builtins (fg/bg), needs to write
- its output to stdout, not stderr (POSIX)
-
-sig.c
- - add an `orig_flags' member to struct terminating_signal so the
- original signal handling flags (SA_RESTART, etc.) can be preserved
- on POSIX systems
- - make sure to preserve the signal flags state in
- initialize_terminating_signals and reset them for child processes
- in reset_terminating_signals
-
-builtins/fc.def
- - fixed an off-by-one error that caused `fc -l' to list one too many
- history entries
- - in posix mode, `fc' should not list any indication as to whether or
- not history lines have been modified (POSIX)
- - when in posix mode, the default editor for `fc' should be `ed' (POSIX)
-
-doc/bashref.texi
- - updated the description of `trap' behavior when given a first
- argument that is a valid signal number
- - noted that `fc -l' won't indicate whether a history entry has been
- modified if the shell is in posix mode
-
-builtins/command.def
- - fixed bug: `command -v' is supposed to be silent if a command is not
- found
-
-builtins/hash.def
- - `hash' should print its `hash table empty' message to stderr
-
-lib/readline/misc.c
- - back out 7/7 change to _rl_maybe_save_line; it breaks emacs-mode ^P
-
-general.c
- - changed base_pathname so that it will return reasonable results for
- non-absolute pathnames -- this is what is intended by all of its
- callers
-
-arrayfunc.c
- - fix array_variable_part to return NULL if it finds an invisible
- variable in the hash table. Fixes seg fault caused by referring to
- unset local variable using array notation
-
-{locale,variables}.c
- - support LC_TIME as a special locale variable so HISTTIMEFORMAT tracks
- the current locale
-
- 8/2
- ---
-variables.c
- - fixed small memory leak in makunbound() when a local array variable
- is unset. Fix from William Park
-
-lib/readline/display.c
- - fixed a problem when computing the number of invisible characters on
- the first line of a prompt whose length exceeds the screen width
- (should only happen when invisible characters occur after the
- line wrap). Bug reported by agriffis@gentoo.org
-
-builtins/command.def
- - `command -V' passes a new flag, CDESC_ABSPATH, which means to convert
- to an absolute path
-
-builtins/type.def
- - in posix mode, `type' and `command -v/-V' should not report
- non-executable files, even if the execution code will attempt to
- run them. Other posix shells do this
-
-doc/bashref.texi
- - add note to POSIX Mode section describing behavior of type and command
- when finding a non-executable file
-
-execute_cmd.c
- - force extended_glob to 1 before calling binary_test in
- execute_cond_node so that the right extended pattern matching gets
- performed
-
- 8/3
- ---
-braces.c
- - make sure lhs[0] and rhs[0] are cast to `unsigned char' so chars
- with values > 128 are handled correctly
-
-builtins/printf.def
- - change bexpand() and printstr() to handle strings with a leading
- '\0' whose length is non-zero, since that's valid input for the
- `%b' format specifier
-
-subst.c
- - fix a couple of instances of find_variable that didn't check the
- result for an invisible variable
-
-variables.c
- - BASH_ARGC, BASH_ARGV, BASH_SOURCE, BASH_LINENO no longer created as
- invisible vars
-
-pcomplete.c
- - make sure COMP_WORDS is not invisible when bind_comp_words returns
- - ditto for COMPREPLY in gen_shell_function_matches
-
- 8/4
- ---
-braces.c
- - fix problem where ${ was ignored but did not increment the open
- brace count. Bug reported by Tim Waugh <twaugh@redhat.com>
-
-variables.c
- - if make_local_variable finds a variable in the correct context in
- the right variable scope, make sure it's not invisible before
- returning it
-
- 8/5
- ---
-builtins/trap.def
- - fixed usage message to show `action' as not optional, though it
- actually is when not in posix mode (for a single argument)
-
- 8/7
- ---
-configure.in
- - kfreebsd-gnu has had its sbrk() problems fixed, and no longer needs
- to be configured --without-gnu-malloc
-
-lib/readline/vi_mode.c
- - in rl_vi_search, free any saved history line before starting the
- search, so failure leaves you at that line, not the last line in
- the history (assuming the current line is not the last history line).
- Fix from llattanzi@apple.com to replace fix of 7/7
-
- 8/9
- ---
-support/Makefile.in
- - renamed `mostly-clean' target to `mostlyclean'
-
- 8/11
- ----
-lib/readline/vi_mode.c
- - make same change for EOL in multibyte character case of
- rl_vi_change_char
-
- 8/12
- ----
-subst.c
- - in verify_substring_values, fix off-by-one error checking bounds of
- `offset', esp. in array values (e.g., getting the highest element
- of an array)
-
- 8/16
- ----
-aclocal.m4
- - change BASH_CHECK_DEV_FD to make sure that file descriptors > 2 are
- accessible via /dev/fd, unlike FreeBSD 5.x
-
-lib/sh/strftime.c
- - make sure `zone' is initialized with gettimeofday before it is used
- - work around HPUX lack of `altzone' and differing definitions of
- `timezone'
-
-lib/malloc/malloc.c
- - internal_memalign and memalign now take a `size_t' as their first
- argument, which seems to be the prevailing standard
-
-lib/malloc/{malloc.c,shmalloc.h}
- - change sh_memalign to take a `size_t' as its first argument
-
-builtins/echo.def
- - if posixly_correct and xpg_echo are both set, don't try to interpret
- any arguments at all, as POSIX/XOPEN requires (fix inspired by Paul
- Eggert)
-
-doc/bashref.texi
- - amend description of bash posix mode to include new echo behavior
-
-builtins/fg_bg.def
- - allow bg to take multiple job arguments, as posix seems to specify,
- placing them all in the background, returning the status of the last
- one as the status of `bg'
-
-lib/readline/vi_mode
- - fix _rl_vi_change_mbchar_case (multibyte-char version of `~'
- command) to have the right behavior at EOL -- handle case where vi
- mode backs up at the end of the line
-
- 8/18
- ----
-array.c
- - check for an empty array in array_rshift before shifting elements
- and adjusting max_index
- - check for null array in array_subrange
-
-jobs.c
- - fix raw_job_exit_status to not ignore exit status of the last
- process in the pipeline when `set -o pipefail' is enabled
-
- 8/19
- ----
-lib/readline/mbutil.c
- - make sure _rl_find_next_mbchar_internal has a valid multibyte
- character before it checks whether or not it's a zero-width
- wide character and adjusts point accordingly
-
- 8/24
- ----
-bashline.c
- - new function, bash_directory_expansion, duplicates the expansions
- performed on the directory name by rl_filename_completion_function
- - call bash_directory_expansion in command_word_completion_function
- if we decide we're doing tilde expansion (and any other
- canonicalization) on the directory name being completed
-
- 8/25
- ----
-configure.in
- - use new-style AC_CHECK_HEADER to check for sys/ptem.h (which requires
- sys/stream.h). The correct checks are in the code, but autoconf
- complains if sys/stream.h is not included, rather than simply
- checking for the header's presence
-
- 8/26
- ----
-builtins/hash.def
- - fix a bug that prevented `hash -d' from working right (as soon as
- hash removed a command from the table, the bug caused it to be added
- right back)
-
- 8/27
- ----
-doc/{bash.1,bashref.texi}
- - explicitly note that conditional primaries that operate on files
- operate on the targets of symbolic links rather than the links
- themselves
-
- 8/30
- ----
-lib/readline/display.c
- - fix multibyte calculation of `physchars' in prompt expansion, to
- handle double-width multibyte characters correctly
- - changes to rl_redisplay to handle prompts longer than the screenwidth
- that might contain double-width multibyte characters. Fixes from
- Tomohiro Kubota
-
- 9/6
- ---
-subst.c
- - change word_list_split to avoid really bad behavior caused by calling
- list_append for each split word -- as the list gets long, you have
- to traverse it every time. Keep a pointer to the end of the list and
- and just tack onto it
-
- 9/8
- ---
-lib/readline/complete.c
- - change fnprint to calculate the displayed width of a filename in
- the same way as fnwidth
-
-subst.c
- - in verify_substring_values, when expanding ${array[@]:offset}, make
- sure negative offsets count from one greater than the array's
- maximum index so things like ${x[@}: -1} work to give the last element
- (requires fixing array tests)
-
-builtins/common.c
- - new error function, sh_wrerror(), for builtins to call when a write
- error occurs
-
-builtins/common.h
- - extern declaration for sh_wrerror()
-
-builtins/cd.def
- - change builtin_error call to use sh_wrerror()
-
-builtins/echo.def
- - report write errors with sh_wrerror() instead of just returning
- failure
-
-builtins/printf.def
- - change printstr to return failure (-1) or success (0) indication
- rather than void
- - report write errors when printstr() fails, return failure
- - if any of the PF/printf calls fail, report write error and return
- failure
-
-execute_cmd.c
- - change execute_in_subshell so the subshell command inherits the
- command timing flags from the enclosing COMMAND *
-
- 9/11
- ----
-[prayers for the victims of 9/11/2001]
-
-lib/sh/strnlen.c
- - new file, implementation of GNU libc extension function strnlen
-
-lib/sh/Makefile.in, {config.h,configure,Makefile}.in, MANIFEST
- - changes for strnlen
-
-configure.in
- - version changed to 3.1-devel
-
-doc/bash.1, lib/readline/doc/rluser.texi
- - added description of `-o plusdirs' to complete/compgen (thanks,
- Arnold)
-
-parse.y
- - new parser_state flag, PST_ASSIGNOK, if set indicates we're parsing
- arguments to a builtin that accepts assignment statement arguments
- - turn on PST_ASSIGNOK in read_token_word when appropriate
- - turn off PST_ASSIGNOK in read_token when appropriate
- - don't attempt to parse a compound assignment specially unless we're
- in a position where an assignment statement is acceptable, or
- PST_ASSIGNOK is set
-
- 9/13
- ----
-variables.c
- - make BASH_ARGC, BASH_ARGV, BASH_LINENO, and BASH_SOURCE
- non-unsettable, since the shell uses those values internally
-
-expr.c
- - make exponentiation right-associative, as is apparently correct
-
- 9/16
- ----
-arrayfunc.c
- - make sure convert_var_to_array marks the environment as needing
- recreation if the converted variable was exported
-
- 9/17
- ----
-braces.c
- - mark ${ as introducing an additional level of braces only if it's
- not in a quoted string -- quoted strings are handled before brace
- matching is done
-
-parse.y
- - fixed an obscure problem in history_delimiting_chars where the `in'
- in a case statement could have a semicolon added after it, if the
- `case word' was on a previous line
-
-support/config.guess
- - support for newest versions of tandem non-stop kernel
-
-lib/readline/display.c
- - in compute_lcd_of_matches, explicitly cast `text' to `char *' before
- passing it to rl_filename_dequoting_function
-
-lib/readline/terminal.c
- - bind the key sequence sent by the keypad `delete' key to delete-char
- (same as ^D in emacs mode)
-
-builtins/ulimit.def
- - in print_all_limits, don't print anything if get_limit returns
- -1/EINVAL, indicating that the kernel doesn't support that particular
- limit
- - add -i (max number of pending signals), -q (max size of posix msg
- queues), -x (max number of file locks) for systems (Linux) that
- support them
-
-doc/{bash.1,bashref.texi}
- - fix description of correspondence between FUNCNAME, BASH_LINENO,
- and BASH_SOURCE indices in description of BASH_LINENO
-
- 9/18
- ----
-lib/sh/shquote.c
- - don't quote CTLESC and CTLNUL with CTLESC in sh_backslash_quote, as
- long as the resultant string never gets sent to the word expansion
- functions without going through the shell parser
-
-externs.h
- - add extern declarations for strnlen and strpbkrk from lib/sh
-
-subst.[ch]
- - changes to handle case where IFS consists of multibyte characters.
- Changed: string_extract_verbatim, split_at_delims,
- string_list_dollar_star, string_list_dollar_at, list_string,
- get_word_from_string, setifs
-
- 9/19
- ----
-mailcheck.c
- - change file_mod_date_changed to reset the cached mail file data if
- the file size drops to zero
-
-lib/readline/complete.c
- - change append_to_match so that a non-zero value for
- rl_completion_suppress_append will cause no `/' to be appended to a
- directory name
-
-bashline.c
- - experimental change to suppress appending a slash for a completed
- filename that is found in PATH as well as a directory in the current
- directory under certain circumstances: a single instance found in
- $PATH when `.' is not in $PATH, and multiple instances found in the
- $PATH, even when `.' is in the $PATH
-
- 9/24
- ----
-command.h
- - new word flag: W_ASSIGNRHS, means word is rhs of assignment statement
- - new word flag: W_NOTILDE, means word is not to be tilde expanded
- - new word flag (internal): W_ITILDE, means the next character is a
- tilde that should be expanded
-
-general.c
- - new set of tilde suffixes for use when parsing the RHS of an
- assignment statement and =~ should not be subject to tilde expansion
- - if ASSIGN_P argument to bash_tilde_expand is 2, use tilde prefixes
- for parsing RHS of assignment statement
-
-general.[ch]
- - new function bash_tilde_find_word, drop-in replacement for
- tilde_find_word
-
-subst.c
- - call bash_tilde_expand with secord argument of 2 when expanding rhs
- of an assignment statement, so tildes after second and subsequent
- `=' in an assignment are not expanded
- - new function, expand_string_assignment, to expand the rhs of an
- assignment statement
- - add `~' to EXP_CHAR, the characters that will cause the word
- expansion functions to be called
- - move tilde expansion into expand_word_internal instead of many
- different calls to bash_tilde_expand scattered across different
- functions. NOTE: This means that double quotes surrounding a
- {paramOPword} expansion will cause tilde expansion to NOT be
- performed on `word'. I think this is right, what POSIX specifies,
- and consistent with the behavior of other characters in the rhs
-
-execute_cmd.c
- - take out calls to bash_tilde_expand before calling word expansion
- functions
-
- 9/26
- ----
-execute_cmd.c
- - make sure to call UNBLOCK_CHILD before returning on a pipe creation
- failure in execute_pipeline
-
- 9/27
- ----
-variables.c
- - change get_bash_command to deal with the_printed_command_except_trap
- being NULL
-
-execute_cmd.c
- - fix execute_simple_command to deal with the_printed_command being
- NULL when assigning to the_printed_command_except_trap -- fixes
- seg fault in savestring()
-
-parse.y
- - change the parser so that the closing `)' in a compound variable
- assignment delimits a token -- ksh93 does it this way
-
-doc/{bash.1,bashref.texi}
- - change description of tilde expansion to note that expansion is
- attempted only after the first =~ in an assignment statement
-
-builtins/declare.def
- - when assigning to an array variable with declare -a x=(...), make
- sure the last character in the rhs of the variable assignment is
- `)', not just that it appears somewhere
-
- 9/28
- ----
-command.h
- - add a `W_NOEXPAND' flag to inhibit all expansion except quote removal
- - add a `W_COMPASSIGN' flag to denote a word is a compound assignment
- statement
-
-parse.y
- - set W_COMPASSIGN on words that appear to be compound assignments
-
-subst.c
- - pass W_NOXPAND and W_COMPASSIGN through end of expand_word_internal
-
-subst.[ch]
- - new function, expand_assignment_string_to_string, calls
- expand_string_assignment and then string_list on the result
-
-variables.c
- - assign_in_env now calls expand_assignment_string_to_string
-
- 9/30
- ----
-builtins/common.c
- - change get_job_spec so the null job `%' once again means the current
- job
-
- 10/1
- ----
-subst.c
- - do_assignment_internal now takes a WORD_DESC * as its first
- argument, and uses its `word' member as the assignment string
- - change expand_word_list_internal to call do_word_assignment instead
- of do_assignment, passing it `word' instead of, e.g., `word->word'
- - change extract_array_assignment_list to just return the passed
- string minus a trailing `)' if the last character is a right
- paren
- - change do_assignment_internal to call extract_array_assignment_list
-
-subst.[ch]
- - change do_assignment and do_assignment_no_expand to take a `char *'
- instead of `const char *' first argument; change extern prototypes
- - new function, do_word_assignment, takes a WORD_DESC * and calls
- do_assignment_internal on it; add extern declaration with prototype
-
-general.h
- - new typedef, sh_wassign_func_t, like sh_assign_func_t but takes a
- WORD_DESC * as its first argument
-
-variables.[ch]
- - assign_in_env now takes a WORD_DESC * as its first argument
-
- 10/2
- ----
-command.h
- - new word flag, W_ASSNBLTIN, denotes that the word is a builtin
- command (in a command position) that takes assignment statements
- as arguments, like `declare'
- - new word flags, W_ASSIGNARG, denotes that word is an assignment
- statement given as argument to assignment builtin
-
-execute_cmd.c
- - set W_ASSNBLTIN flag in fix_assignment_words if necessary (if there
- are any arguments that are assignment statements)
- - set W_ASSIGNARG flag in fix_assignment_words if necessary
-
-subst.c
- - new function, do_compound_assignment, encapsulates the necessary
- code to perform a compound array assignment (including creation of
- local variables); called from do_assignment_internal
- - to fix the double-expansion problem with compound array assignments
- that are arguments to builtins like `declare', changed
- shell_expand_word_list to treat those arguments like assignment
- statements (with proper creation of local variables inside shell
- functions) and pass the attribute-setting portion of the statement
- onto the builtin. This is what ksh93 appears to do, from inspection
- of the `ksh93 -x' output
-
-execute_cmd.c
- - fix execute_simple_command: in case of pipeline or async command,
- when forking early, set `subshell_environment' so that it can contain
- both SUBSHELL_PIPE and SUBSHELL_ASYNC -- the two should not be
- mutually exclusive. Fixes bug reported by pierre.humblet@ieee.org
- - remove references to last_pid, old_command_subst_pid; use NO_PID as
- a sentinel value to decide whether or not a child process has been
- created and needs to be waited for. Submitted by
- pierre.humblet@ieee.org to fix recycling-pid problem on cygwin
-
-doc/{bash.1,bashref.texi}
- - fixed documentation of `@(pattern)' extended globbing operator --
- it succeeds if the string matches one of the patterns, not exactly
- one. This is what ksh93 does, too
-
-lib/readline/complete.c
- - fixed rl_menu_complete so that a negative argument cycles backwards
- through the list
-
- 10/3
- ----
-subst.c
- - use W_COMPASSIGN flag in do_assignment_internal instead of deciding
- lexically which assignments are compound array assignments
-
- 10/6
- ----
-support/shobj-conf
- - additions for System V.5 from Boyd Gerber <gerberb@zenez.com>
-
-subst.c
- - in command_substitute, if subshell_environment includes
- SUBSHELL_ASYNC, call make_child with the `async_p' argument set to
- non-zero. This keeps command substitutions for async commands or
- pipelines from trying to give the terminal back to the shell's
- pgrp. make sure to save and restore last_asynchronous_pid. Fix
- suggested by <pierre.humblet@ieee.org>
-
- 10/7
- ----
-config.h.in
- - add a placeholder definition for WCONTINUED_BROKEN
-
- 10/9
- ----
-aclocal.m4
- - add BASH_CHECK_WCONTINUED, checks for glibc bug where WCONTINUED is
- defined but rejected as invalid by waitpid(2)
-
-configure.in
- - add call to BASH_CHECK_WCONTINUED, defines WCONTINUED_BROKEN
-
-redir.c
- - experimental change to add_undo_redirect to save manipulations to
- file descriptors >= SHELL_FD_BASE (10) on the list of redirections
- to be undone even if `exec' causes the list to be discarded
-
-doc/{bash.1,bashref.texi}
- - note that redirections using file descriptors > 9 should be used
- carefully, because they might conflict with file descriptors the
- shell uses internally
-
- 10/11
- -----
-parse.y
- - fix pipeline_command production to handle case where `pipeline'
- as `argument' of `!' or `time' is null (e.g., a syntax error not
- handled by the grammar)
-
- 10/13
- -----
-lib/readline/readline.c
- - new internal variable, _rl_bind_stty_chars; if non-zero, bind the
- terminal special characters to readline equivalents at startup
- - change readline_default_bindings() and reset_default_bindings() to
- understand _rl_bind_stty_chars
-
-lib/readline/rlprivate.h
- - new extern declaration for _rl_bind_stty_chars
-
-lib/readline/rltty.c
- - change rl_prep_terminal to add support for _rl_bind_stty_chars
-
- 10/15
- -----
-lib/readline/bind.c
- - new bindable variable, `bind-tty-special-chars', bound to value of
- _rl_bind_stty_chars
-
-doc/bash.1,lib/readline/doc/{readline.3,rluser.texi}
- - documented new readline variable `bind-tty-special-chars'
-
-builtins/pushd.def
- - make the first check for option `--' skip the rest of option
- checking
-
- 10/16
- -----
-lib/readline/shell.c
- - change sh_set_lines_and_columns to prefer setenv, which has
- predictable memory allocation behavior, to putenv, which does not
-
- 10/19
- -----
-variables.c
- - change push_exported_var so that a tempenv variable has to have the
- export attribute set (which they all do -- something to look at) and
- the `propagate' attribute set to be propagated down to the next
- scope
-
-execute_cmd.c
- - change execute_builtin so that if CMD_COMMAND_BUILTIN is set in the
- passed flags argument, call pop_scope with a value that says the
- builtin is not special, since `command' means that preceding variable
- assignments don't persist in the environment. Fixes problem with
- variable assignments preceding command preceding special builtin
- keeping those variable assignments around (when in posix mode)
-
- 10/20
- -----
-lib/sh/shquote.c
- - new function, sh_mkdoublequoted, brackets a given string with
- double quotes and returns a new string. Flags argument, if non-
- zero, means to quote embedded double quotes with backslashes
-
-externs.h
- - new extern declaration for sh_mkdoublequoted
-
-parse.y
- - use sh_mkdoublequoted after calling localeexpand()
-
-lib/sh/strtrans.c
- - change ansicstr to understand that (flags & 4) != 0 means to remove
- backslash from unrecognized escape sequences
-
-general.c
- - fix logic problem in assignment() that caused non-variable-starter
- characters to be allowed, resulting in things like `1=xxx' creating
- a variable `1' in the hash table
-
- 10/21
- -----
-bashline.c
- - don't call programmable_completions with an assignment statement
- argument
-
- 10/22
- -----
-lib/readline/rltty.c
- - in prepare_terminal_settings, turn echoing on (readline_echoing_p)
- if get_tty_settings fails because the input is not a terminal
-
- 10/24
- -----
-lib/readline/util.c
- - include rlmbutil.h for multibyte definitions
- - new function, _rl_walphabetic, wide char version of rl_alphabetic
-
-lib/readline/mbutil.c
- - new function, _rl_char_value(buf, ind), returns value of (possibly
- multibyte) character at buf[ind]
-
-lib/readline/rlmbutil.h
- - extern defines for _rl_walphabetic and _rl_char_value for when
- multibyte chars are not being used
- - new wrapper definitions for _rl_find_next_mbchar (MB_NEXTCHAR) and
- _rl_find_prev_mbchar (MB_PREVCHAR) that try to avoid unneeded
- function calls
-
-lib/readline/text.c
- - fix rl_foward_word to work with multibyte characters (or in a
- multibyte locale) using above utility functions
- - fix rl_backward_word to work with multibyte characters (or in a
- multibyte locale) using above utility functions
-
- 10/26
- -----
-parse.y
- - fix parse_matched_pair so that it doesn't swallow \<newline> when
- parsing a $'...' construct (call shell_getc with different arg)
-
- 10/28
- -----
-lib/glob/glob.c
- - after some (compiled-in) threshold, glob_vector will stop using
- alloca to allocate `struct globval's and will switch to using
- malloc, with appropriate cleanup before returning
-
-subst.c
- - don't expand tildes after `=' in expand_word_internal, even if the
- W_TILDEEXP flag is set, unless it's the first tilde in a word
- marked W_ASSIGNMENT
-
- 10/31
- -----
-lib/readline/text.c
- - make sure rl_point doesn't go below 0 in rl_delete_horizontal_space
- (from SUSE, but not sent in)
-
-shell.c
- - make sure shell_is_restricted skips over a single leading `-' in
- the shell name (from SUSE, but not sent in)
-
-lib/readline/display.c
- - disable `fast redisplay' at the end of the line if in a locale that
- supports multibyte characters (from SUSE, but not sent in)
-
-lib/readline/histexpand.c
- - fix a problem with finding the delimiter of a `?' substring when
- compiled for multibyte characters (from SUSE, but not sent in)
-
- 11/1
- ----
-lib/readline/display.c
- - correct some assignments to _rl_last_c_pos: when in a multibyte
- locale, it's used as an absolute cursor position; when not using
- multibyte characters, it's a buffer offset. I should have caught
- this when the multibyte character support was donated
-
- 11/5
- ----
-general.c
- - change `assignment()' to accept `+=' assignment operator
-
-arrayfunc.[ch]
- - bind_array_variable and assign_array_element both take a new `flags'
- argument
- - assign_array_var_from_string, assign_array_from_string, and
- assign_array_var_from_word_list now all take a new `flags' argument
- - change assign_array_var_from_word_list to understand how to append
- to an array variable
- - change assign_array_var_from_string to understand how to append
- to an array variable. It does not unset the previous value if
- appending, allowing both old values to be changed and new ones to
- be added
-
-subst.h
- - new flag #defines to use for evaluating assignment statements
-
-{subst,variables}.c, builtins/{declare,read}.def
- - change callers of assign_array_element and bind_array_variable
- - change do_compound_assignment to understand assignment flags
- - change do_assignment_internal to set assignment flags and pass them
- to underlying functions
-
-pcomplete.c,builtins/{declare,read}.def
- - fix callers of assign_array_var_from_string, assign_array_var_from_word_list
-
-variables.[ch]
- - make_variable_value now takes a new `flags' argument
- - make_variable_value now understands how to append to a particular
- variable, using the old value
- - bind_variable_value now takes a new `flags' argument
- - change make_variable_value to understand ASS_APPEND flag
- - bind_variable now takes a new `flags' argument
- - bind_variable_internal now takes a new `flags' argument
-
-arrayfunc.c
- - change callers of make_variable_value to add flags arg
-
-builtins/declare.def
- - change callers of bind_variable_value to add flags arg
-
-{execute_cmd,mailcheck,pcomplete,shell,subst,variables}.c,parse.y
-builtins/{cd,command,declare,getopts,read,set,setattr}.def
- - change callers of bind_variable to add flags arg
-
-variables.c
- - change callers of bind_variable_internal
- - change bind_variable_internal to pass assignment flags on to
- make_variable_value
- - change assign_in_env to treat `var+=value' like `var=value'
-
-arrayfunc.c
- - break code that actually constructs the new value and assigns it
- to a particular array index out into a new functions:
- bind_array_var_internal. This fakes out make_variable_value by
- passing a dummy SHELL_VAR * so it can do proper appending and other
- += processing
- - changes to assign_array_var_from_string to accept and process as if
- they were `standalone' assignment statements array assignment words
- of the form [ind]+=val
-
- 11/7
- ----
-builtins/declare.def
- - added support for `declare [flags] var+=value'. `Flags' are applied
- before the assignment is performed, which has implications for things
- like `-i' -- if -i is supplied, arithmetic evaluation and increment
- will be performed
-
-builtins/setattr.def
- - add support for `+=' assignment for rest of `assignment builtins':
- export, readonly
-
- 11/12
- -----
-lib/readline/display.c
- - make sure prompt_physical_chars and prompt_invis_chars_first_line
- are reset to 0 if the prompt string passed to rl_expand_prompt is
- NULL or empty
-
- 11/14
- -----
-{configure,config.h}.in
- - check for `raise', define HAVE_RAISE if available
-
-lib/intl/dcigettext.c
- - make sure `raise' is defined if HAVE_RAISE is not before
- eval-plurah.h is included
-
-lib/malloc/trace.c
- - put extern declaration for imalloc_fopen inside the MALLOC_TRACE
- #ifdef
-
- 11/16
- -----
-lib/intl/Makefile.in
- - make sure SHELL is defined to cpp
-
-lib/intl/dcigettext.c
- - make sure we use getcwd() even if HAVE_GETCWD is not defined after
- including config.h; if SHELL is defined, #define HAVE_GETCWD
-
- 11/18
- -----
-trap.[ch]
- - new function, int signal_in_progress(int sig), returns TRUE if the
- trap handler for signal SIG is currently executing
-
- 11/19
- -----
-redir.c
- - slightly change do_redirection_internal to set the close-on-exec
- flag for file descriptors > 2 used to save file descriptors < 2
- using explicit redirections (e.g., `exec 3>&1'). This keeps file
- descriptors pointing to pipes from being left open but doesn't
- change the shell's file descriptor semantics
-
- 11/20
- -----
-doc/{bash.1,bashref.texi}
- - correct some minor typos, forwarded from doko@debian.org
-
- 11/22
- -----
-doc/bash.1,lib/readline/doc/{readline.3,rluser.texi}
- - documented detail that yank-last-arg and yank-nth-arg use the history
- arg expansion code (and, as a result, are subject to restrictions
- of the history-comment character)
-
- 11/23
- -----
-execute_cmd.c
- - changes so that BASH_COMMAND preserves its value into a DEBUG trap:
- for commands, arithmetic for command expressions, select commands,
- case commands, (( commands, [[ commands, simple commands
-
- 11/24
- -----
-doc/{bash.1,bashref.texi}
- - changed description of `set' builtin slightly so that it is clear
- that only variables are displayed in posix mode and that read-only
- variables can't be reset by simply sourcing the output of `set'
-
-lib/sh/strftime.c
- - don't try to redefine `inline' if it's already defined
-
- 11/26
- -----
-execute_cmd.c
- - fix execute_function to check funcname_a after function execution,
- since FUNCNAME can be changed or unset within a function
-
- 11/27
- -----
-builtins/evalfile.c
- - make same changes as 11/26, this time to _evalfile
-
-execute_cmd.c
- - change execute_function to run the return trap after a function
- completes execution even if the shell is compiled without DEBUGGER
- defined
-
-trap.c
- - change reset_or_restore_signal_handlers so that the RETURN trap is
- not inherited by command substitution when DEBUGGER is not defined
-
- 11/30
- -----
-lib/readline/misc.c
- - fix memory leaks in _rl_free_history_entry and rl_maybe_replace_line
- caused by not freeing `timestamp' member of history entry
- - make sure timestamp is initialized to NULL in rl_maybe_save_line
-
- 12/1
- ----
-execute_cmd.c
- - fix execute_function so a function calling `return' will run the
- RETURN trap, if one's defined
-
-doc/{bash.1,bashref.texi}
- - fix description of RETURN trap in various places to indicate that it's
- only inherited by shell functions if function tracing is on globally
- or has been enabled for that function
- - fix documentation to indicate that the DEBUG and RETURN traps are
- inherited under the same conditions
-
-execute_cmd.c
- - a function does not inherit the RETURN trap if a DEBUG trap is
- currently running
-
- 12/2
- ----
-lib/glob/xmbsrtowcs.c
- - change xmbsrtowcs to handle the one case where malloc can fail
- (though it should not matter) -- don't try to free a null pointer
-
- 12/9
- ----
-subst.c
- - fix get_var_and_type to handle var[@], where `var' is a scalar
- variable, identically to var -- all calling expansions can now
- handle var[@] like var. Bug reported by agriffis@gentoo.org
-
- 12/10
- -----
-lib/readline/bind.c
- - make new-style "\M-x" keybindings obey `convert-meta' settings
- (bug reported by twaugh@redhat.com)
-
- 12/14
- -----
-builtins/set.def
- - added description of `-' option to help text
-
-builtins/shopt.def
- - fix bug that caused `gnu_errfmt' to not be compiled in unless
- READLINE is defined
-
- 12/16
- -----
-subst.c
- - fixed a typo in string_extract_verbatim in first call to MBLEN
- (used `slen - 1' instead of `slen - i')
-
- 12/17
- -----
-subst.c
- - avoid some calls to strlen if the value is only being used for
- ADVANCE_CHAR and MB_CUR_MAX == 1 (since ADVANCE_CHAR doesn't need
- it unless multibyte characters are possible)
- - change string_extract_verbatim so it takes the length of the string
- as a parameter, so we don't have to recompute the length of the same
- string over and over again when doing word splitting (that kills if
- it's a long string)
-
- 12/18
- -----
-subst.c
- - in string_list_dollar_star, make sure to null-terminate the
- separator if the character is longer than one byte
-
- 12/22
- -----
-doc/{bash.1,bashref.texi}
- - changed text in quoting section explaining that double quotes do
- not prevent history expansion from taking place, and that backslashes
- escaping ! are not removed
-
- 12/28
- -----
-shell.c
- - set gnu_error_format to 1 if running under emacs. This should allow
- the emacs `next-error' stuff to work, at least for interactive shells
-
-parse.y
- - change yy_stream_get to set interrupt_immediately before calling
- getc_with_restart when the shell is interactive. This avoids the
- synchronization problem caused by the call to QUIT in read_a_line,
- which results in the first character after a SIGINT/^C to be
- dropped
-
- 12/30
- -----
-builtins/mkbuiltins.c
- - changes to write long documentation to arrays as a single string by
- default, rather than an array of strings -- enabled by default
- - new option, -S, to restore old behavior of writing multiple strings
- for long documentation
- - changes to avoid filenames written when the separate-filenames option
- (-H) has been supplied being run through gettext
-
-configure.in
- - new cofiguration option, --enable-single-help-strings (on by default),
- causes help text to be stored as a single string (or smaller set than
- one string per line)
-
-builtins/Makefile.in
- - pass `-S' to mkbuiltins if single-help-strings is turned off
-
-doc/bashref.texi
- - documented new `single-help-strings' configure option
-
- 1/3/2005
- --------
-jobs.c
- - make wait_for return a non-zero status if the job or processed
- waited for is suspended. Returns 128 + stop signal. This fixes
- the problem with `echo one && sleep 5 && echo two' displaying
- `two' after the sleep is suspended
-
- 1/5
- ---
-print_cmd.c
- - change indirection_level_string so the code duplicates the first
- character of $PS4 to indicate the indirection level, rather than
- the first byte
-
- 1/8
- ---
-variables.c
- - new special variable hook function for COMP_WORDBREAKS; sets
- rl_completer_word_break_characters back to NULL when the variable
- is unset
- - change bind_variable_value to understand dynamic variables with
- assign_function set, and handle them correctly. If the variable is
- being appended to, use make_variable_value to create the new
- value
- - change bind_variable_internal to understand dynamic variables with
- assign_function set, and handle them the same way
- - RANDOM and LINENO now get the integer attribute, so appending works
- as expected
- - ditto for HISTCMD, MAILCHECK, OPTIND
-
-lib/readline/display.c
- - change _rl_make_prompt_for_search to set prompt_physical_chars
- appropriately
- - rl_save_prompt and rl_restore_prompt save and restore
- prompt_prefix_length
- - change redraw_prompt to use rl_save_prompt and rl_restore_prompt
- - change rl_restore_prompt to set the `save' variables back to
- NULL/0 so code can check whether or not the prompt has been saved
- - change rl_message and rl_clear_message to save and restore the
- prompt if the caller has not already done it (using a simple
- semaphore-like variable)
- - change rl_message to call expand_prompt, so that local_prompt and
- local_prompt prefix are set before calling the redisplay functions,
- in case the prompt is longer than a screenwidth (fixes bug
- reported to debian by epl@unimelb.edu.au)
-
-lib/readline/doc/rltech.texi
- - make sure to note that rl_save_prompt should be called before
- rl_message, and rl_restore_prompt before rl_clear_message
-
-pcomplete.c
- - make sure to save and restore the parser state around the call to
- execute_shell_function in gen_shell_function_matches. Fixes bug
- reported by a050106.1.keeLae3x@captaincrumb.com (cute)
-
-lib/readline/readline.c
- - fix _rl_dispatch_subseq in the case where we're recursing back up
- the chain (r == -2) and we encounter a key shadowed by a keymap,
- but originally bound to self-insert. Calling rl_dispatch with
- ANYOTHERKEY as the first argument will call rl_insert, but with
- ANYOTHERKEY (256) as the char to insert. Use the shadow keymap
- and set things up to dispatch to rl_insert with the shadowed key
- as the argument. Fixes the bug reported by Thomas Glanzmann
- (sithglan@stud.uni-erlangen.de)
-
- 1/13
- ----
-command.h
- - new word flag: W_HASQUOTEDNULL
-
-make_cmd.c
- - new function to allocate a WORD_DESC * without doing anything with a
- containing string: alloc_word_desc
-
-make_cmd.h
- - extern declaration for alloc_word_desc
-
-dispose_cmd.c
- - new function to just free a WORD_DESC * without freeing the contained
- string: dispose_word_desc
-
-dispose_cmd.h
- - extern declaration for dispose_word_desc
-
-subst.c
- - change some places to use alloc_word_desc
- - make same changes to word_list_quote_removal as were made to
- word_list_split
- - set W_HASQUOTEDNULL when a word is created with w->word[0] ==
- CTLNUL and w->word[1] == '\0'
-
-subst.c
- - parameter_brace_expand_word now returns a WORD_DESC * -- changed
- callers to understand
- - parameter_brace_expand_indir now returns a WORD_DESC * -- changed
- callers to understand
- - parameter_brace_expand_rhs now returns a WORD_DESC * -- changed
- callers to understand
- - remove W_HASQUOTEDNULL from a word's flags when remove_quoted_nulls
- is called on the word's enclosed string
-
- 1/15
- ----
-subst.c
- - param_expand now returns a WORD_DESC * -- changed callers to
- understand
- - parameter_brace_expand now returns a WORD_DESC * -- changed
- callers to understand
- - in expand_word_internal, only call remove_quoted_nulls after a word
- is returned with W_HASQUOTEDNULL
- - changes to pass W_HASQUOTEDNULL flag out of expand_word_internal;
- changed callers to call remove_quoted_nulls only if return value has
- W_HASQUOTEDNULL set. This is a mostly-complete fix for the
- long-standing CTLNUL confusion between a quoted null expansion and
- the expansion of a variable with a literal '\177' in its value
- - change string_list_dollar_at to compute the separator character the
- same way as string_list_dollar_star: using the already-computed
- values generated in setifs()
- - when expanding unquoted $*, if $IFS is empty, check whether or not
- we're eventually going to split the results (e.g., on the rhs of an
- assignment statement) and concatenate the positional parameters as
- if the expansion were within double quotes if we're not going to
- split
-
-tests/iquote.tests
- - test cases based on old bug reports about the quoted-null vs. 0177
- problem the recent code fixes
-
- 1/16
- ----
-dispose_cmd.c
- - set w->word to 0 before putting a WORD_DESC * back in the cache in
- dispose_word_desc; changed callers to delete those assignments
-
-variables.c
- - change assign_random and get_random_value so that the random number
- generator only gets re-seeded once in a subshell environment, and
- assigning a value to RANDOM counts as seeding the generator. This
- makes the sequences a little more predictable
-
- 1/20
- ----
-lib/readline/history.c
- - fix replace_history_entry, remove_history to return NULL if
- passed index is < 0
-
- 1/22
- ----
-lib/sh/netconn.c
- - fix isnetconn() to understand that getpeername can return ENOTCONN
- to indicate that an fd is not a socket
-
-configure.in
- - set BUILD_DIR to contain backslashes to escape any spaces in the
- directory name -- this is what make will accept in targets and
- prerequisites, so it's better than trying to use double quotes
- - set SIZE to the appropriate value if some cross-compiling tool
- chain is being used; `size' by default (can be overridden by
- SIZE environment variable)
-
-Makefile.in
- - use $(SIZE) instead of size; set SIZE from configure
-
- 1/31
- ----
-arrayfunc.c
- - in array_value_internal, return NULL right away if the variable's
- value is NULL, instead of passing a null string to add_string_to_list
-
- 2/1
- ---
-jobs.h
- - new struct to hold stats and counters for child processes and jobs
- - change some uses of global and static variables to use members of
- new struct (struct jobstats)
-
- 2/2
- ---
-
-jobs.[ch]
- - change PRUNNING to PALIVE
- - new define INVALID_JOB
- - new macro get_job_by_jid(ind), currently expands to jobs[ind]
- - new define J_JOBSTATE, operates on a JOB * like JOBSTATE operates on
- a job index
- - new function, reset_job_indices, called from delete_job if
- js.j_lastj or js.j_firstj are removed
- - change various functions to keep counters and stats in struct jobstats
-
-pcomplete.c, builtins/common.c, builtins/{exit,fg_bg,jobs,kill,wait}.def
- - change global variables (e.g., job_slots) to struct members
- (e.g., js.j_jobslots)
- - use INVALID_JOB define where appropriate
- - use get_job_by_jid and J_JOBSTATE where appropriate
-
-trap.c
- - change reset_or_restore_signal_handler to not free the exit trap
- string if the function pointer is reset_signal, which is used when
- the trap strings shouldn't be freed, like in command substitution
-
- 2/4
- ---
-jobs.c
- - new function, realloc_jobs_list, copies jobs array to newly-allocated
- memory shrinking (or growing) size to have next multiple of JOB_SLOTS
- greater than js.j_njobs
- - change compact_jobs_list to just call reap_dead_jobs and then
- realloc_jobs_list, simplifying it considerably
- - discard_pipeline now returns `int': the number of processes freed
- - slightly changed the logic deciding whether or not to call
- compact_jobs_list: now non-interactive shells will compact the
- list if it reaches MAX_JOBS_IN_ARRAY in size
-
-parse.y
- - move test for backslash-newline after pop_string in shell_getc so
- that things like
-
- ((echo 5) \
- (echo 6))
-
- work right
-
- 2/8
- ---
-jobs.h
- - new structs for holding status of exited background processes, as
- POSIX specifies
- - new job flag: J_ASYNC
-
-jobs.c
- - new functions to manipulate struct holding status of exited
- background processes
- - new members in struct jobstats to hold pointer to last created job
- and last created asynchronous job
- - initialize js.c_childmax in initialize_job_control
- - if the `async' arg to stop_pipeline is non-null, set the J_ASYNC
- flag in the job struct
- - set js.j_last_made_job and js.j_last_asynchronous_job in
- stop_pipeline
- - new function: find_last_proc, returns the PROCESS * to the last proc
- in a job's pipeline
- - changed find_last_pid to call find_last_proc
- - change delete_job to call bgp_add on the last proc of the job being
- deleted
- - change delete_all_jobs and wait_for_background_pids to call bgp_clear
-
- 2/9
- ---
-jobs.c
- - change wait_for_single_pid to look for pid in bgpids.list (using
- bgp_search()) if find_pipeline returns NULL
-
- 2/10
- ----
-support/shobj-conf
- - change the solaris-gcc stanza so that it auto-selects the appropriate
- options for ld depending on which `ld' gcc says it's going to run
-
- 2/11
- ----
-jobs.h
- - add support for PS_RECYCLED as a process state, add PRECYCLED macro
- to test it. Change PALIVE and PRUNNING macros to not count processes
- in PS_RECYCLED state
-
-execute_cmd.c
- - restore use of last_pid as sentinel value; use NO_PID as sentinel
- only if RECYCLES_PIDS is defined
-
-jobs.c
- - change find_job to return a pointer to the PROCESS the desired pid
- belongs to, analogous to find_pipeline returning pointer to JOB
- - change find_job callers to add extra argument
- - change running_only arguments to find_pipeline and find_job to
- alive_only, since we don't want recycled pids returned here and it
- better describes the result
- - new function find_process, calls find_pipeline and searches the
- returned pipeline for the PROCESS * describing the desired pid
- - in make_child, if fork() returns the same pid as the value of
- last_asynchronous_pid when RECYCLES_PIDS is defined, avoid pid
- aliasing by resetting last_asynchronous_pid to 1
- - use PRUNNING instead of child->running, since we, for the most
- part, don't want to consider recycled pids (e.g., in make_child())
- - call find_process instead of find_pipeline in waitchld()
- - use PEXITED(p) instead of testing p->running == PS_DONE
- - in make_child, call bgp_delete to remove a just-created pid from the
- last of saved pid statuses
- - in add_process, check whether or not pid being added is already in
- the_pipeline or the jobs list (using find_process) and mark it as
- recycled if so
- - This set of fixes mostly came from Pierre Humblet
- <pierre.humblet@ieee.org> to fix pid aliasing and reuse problems on
- cygwin
-
-variables.c
- - set $_ from the environment if we get it there, set to $0 by
- default if not in env
-
-doc/{bashref.texi,bash.1}
- - a couple of clarifying changes to the description of $_ based on
- comments from Glenn Morris <gmorris+mail@ast.cam.ac.uk>
-
- 2/15
- ----
-shell.c
- - use strstr instead of strmatch when checking whether $EMACS contains
- `term' -- simpler and faster
-
- 2/18
- ----
-builtins/cd.def
- - implement posix requirement that `pwd -P' set $PWD to a directory
- name containing no symlinks
- - add new function, setpwd(), just sets (and changes exported value)
- of PWD
-
-doc/bashref.texi
- - add note to posix mode section about pwd -P setting $PWD
-
-doc{bash.1,bashref.texi}
- - added note that BASH_ARGC and BASH_ARGV are only set in extended
- debug mode
- - expand description of extdebug option to include everything changed
- by extended debug mode
-
- 2/19
- ----
-pathexp.h
- - new flag macro, FNMATCH_IGNCASE, evaluates to FNM_CASEFOLD if the
- match_ignore_case variable is non-zero
-
-execute_cmd.c
- - new variable, match_ignore_case
- - change call to strmatch() in execute_case_command so it includes
- FNMATCH_IGNCASE
-
-test.c
- - change call to strmatch() in patcomp() so that pattern matching
- calls for [[ ... ]] obey the match_ignore_case variable
-
-lib/sh/shmatch.c
- - if match_ignore_case is set, enable REG_ICASE in the regexp match
- flags
-
-builtins/shopt.def
- - new settable option, `nocasematch', controls the match_ignore_case
- variable. Currently alters pattern matching for case and [[ ... ]]
- commands (==, !=, and =~ operators)
-
-doc/{bashref.texi,bash.1}
- - updated descriptions of [[ and case to include reference to
- nocasematch option
-
- 2/22
- ----
-builtins/mkbuiltins.c
- - add `times' to the list of posix special builtins
-
- 2/23
- ----
-builtins/cd.def
- - posix mode no longer turns on effect of -P option on $PWD if a
- directory is chosen from CDPATH
-
-doc/bashref.texi
- - clarified that in posix mode, reserved words are not alias expanded
- only in a reserved word context
- - removed item about cd, $CDPATH, and -P from posix mode section
-
- 2/24
- ----
-builtins/reserved.def
- - minor cleanups to the description of `if'
-
- 3/2
- ---
-subst.c
- - change list_string and get_word_from_string to explicitly treat an
- IFS character that is not space, tab, or newline *and any adjacent
- IFS white space* as a single delimiter, as SUSv3/XPG6 says
-
-builtins/read.def
- - check whether or not the number of fields is exactly the same as
- the number of variables instead of just assigning the rest of the
- line (minus any trailing IFS white space) to the last variable.
- This parses a field and checks whether or not it consumes all of
- the input (including any trailing field delimiters), falling back
- to the previous behavior if it does not. This is what POSIX.2
- specifies, I believe (and the consensus of the austin-group list).
- This requires a few tests in read.tests to be changed: backslashes
- escaping IFS whitespace characters at the end of input cause the
- whitespace characters to be preserved in the value assigned to the
- variable, and the trailing non-whitespace field delimiter issue
-
- 3/7
- ---
-configure.in
- - add -D_POSIX_SOURCE to the LOCAL_CFLAGS for Interix
-
- 3/8
- ---
-bashline.c
- - make bash_directory_expansion a void function, since it doesn't have
- any return value
-
- 3/9
- ---
-builtins/read.def
- - when testing for a pipe, use `fd' instead of hard-coding 0, since we
- can read from other file descriptors now
-
-lib/sh/zread.c
- - in zsyncfd, only set lind and lused to 0 if the lseek succeeds.
- If the lseek fails, we might steal input from other programs, but
- a failed lseek won't cause us to erroneously discard input
-
- 3/11
- ----
-builtins/evalstring.c
- - don't allow parse_and_execute to short-circuit and call exec() if
- the command's return value is being inverted
-
- 3/15
- ----
-builtins/printf.def
- - new macro PC to call putchar and increment number of chars printed -
- fixes bug in computation of value for %n format char
- - `tw' is now a global var so printstr can modify it using PC()
- - convert PF macro to use asprintf into a local buffer
- Preparation for printf -v var
- - add code to add the text printed to a `variable buffer' if -v option
- supplied. The buffer grows as needed
- - printf now takes a `-v var' option to put the output into the variable
- VAR rather than sending it to stdout. It does not:
- print partial output on error (e.g., format string error)
- handle NULs in the variable value, as usual
-
- 3/16
- ----
-parse.y
- - fix bug in prompt string decoding that caused a core dump when PS1
- contained \W and PWD was unset (null pointer deref)
-
-builtins/printf.def
- - changed -v var behavior so it stores partial output into the named
- variable upon an error
-
- 3/24
- ----
-lib/readline/bind.c
- - bool_to_int now takes a `const char *' argument
-
-support/{printenv,recho,zecho}.c
- - include config.h
- - include "bashansi.h" for appropriate extern function declarations
-
-configure.in
- - on MacOS X 10.4, compensate for loader not allowing static library
- to override existing system dynamic library when compiling -dynamic
- (affects readline and history libraries); so use absolute pathname
- instead of -lreadline as library name
-
-lib/glob/{glob,sm_loop,smatch}.c
- - make sure to cast arguments to (char *) or (unsigned char *) as
- appropriate to avoid gcc4 warnings
-
-lib/glob/smatch.c
- - collsym (single-byte version) now takes a (CHAR *) first argument to
- match callers; cast argument to strncmp appropriately
-
-lib/sh/snprintf.c
- - fix ldfallback and dfallback to handle width and precision specs in
- the format passed to sprintf()
- - fix STAR_ARGS macro to deal with negative field widths and precisions
-
- 3/25
- ----
-builtins/printf.def
- - since a negative precision in a "x.x[fFgGeE]" format specifier should
- be allowed but treated as if the precision were missing, let it
- through
-
-lib/sh/snprintf.c
- - fix * code to deal with a negative precision by treating it as if
- the `.' and any digit string in the precision had not been specified
- - fix format parsing code to deal with a negative inline precision,
- e.g., "%4.-4f" by treating it as if the `'. and any digit string in
- the precision had not been specified
- - a `+' in a format specifier should only act as a flag if it comes
- before a `.' (otherwise it is ignored)
-
-lib/readline/vi_mode.c
- - new function, rl_vi_rubout, to rl_rubout as rl_vi_delete is to
- rl_delete; saves deleted text for possible reinsertion as with any
- vi-mode `text modification' command (fixes problem with `X' reported
- by beat.wieland@gmx.ch)
-
-lib/readline/vi_keymap.c
- - bind `X' in vi command mode to rl_vi_rubout
-
-lib/readline/funmap.c
- - add a bindable `vi-rubout' command, runs rl_vi_rubout
-
-lib/readline/text.c
- - rewrote internals of _rl_rubout_char to make structure cleaner
-
-lib/readline/{complete,text}.c
- - changed code to remove #ifdef HANDLE_MULTIBYTE where possible
-
- 3/28
- ----
-lib/readline/examples/rl.c
- - include <sys/stat.h> instead of posixstat.h if READLINE_LIBRARY not
- defined
-
-subst.c
- - fix mbstrlen to treat invalid multibyte sequences as sequences of
- single-byte characters
-
- 4/8
- ---
-configure.in
- - default SIZE to `:' if cross-compiling and an appropriate size for
- the target is not found
-
- 4/11
- ----
-subst.c
- - change match_upattern and match_wpattern to check whether or not the
- supplied pattern matches anywhere in the supplied string, prefixing
- and appending the pattern with `*' if necessary. If it doesn't we
- can short-circuit immediately rather than waste time doing up to
- N-1 unsuccessful calls to strmatch/wcsmatch (which kills for long
- strings, even if the pattern is short)
-
- 4/12
- ----
-configure.in
- - make sure the special case for MacOS X 10.4 only kicks in if the
- `--with-installed-readline' option isn't supplied
-
-lib/readline/{callback,readline,signals}.c
- - make sure rl_prep_term_function and rl_deprep_term_function aren't
- dereferenced if NULL (as the documentation says)
-
-builtins/mkbuiltins.c
- - don't bother with the special HAVE_BCOPY code; just use straight
- assignments
-
-builtins/ulimit.def
- - use _POSIX_PIPE_BUF in pipesize() if it's defined and PIPE_BUF is
- not
-
- 4/13
- ----
-execute_cmd.c
- - add cm_function_def to the list of control structures for which
- child processes are forked when pipes come in or out
-
- 4/14
- ----
-builtins/read.def
- - make sure the ^As added for internal quoting are not counted as
- characters read when -n is supplied
-
- 4/20
- ----
-redir.c
- - fix redir_open so that the repeat open on failure that AFS support
- adds restores the correct value of errno for any error message
-
- 4/26
- ----
-
-Makefile.in
- - make sure mksignames and mksyntax are invoked with the $(EXEEXT)
- extension
-
- 4/28
- ----
-lib/readline/readline.h
- - new state variable: RL_STATE_CALLBACK, means readline is using the
- callback interface
-
-lib/readline/callback.c
- - set RL_STATE_CALLBACK in rl_callback_handler_install, unset in
- rl_callback_handler_remove
-
- 4/29
- ----
-config-top.h
- - DONT_REPORT_SIGPIPE is now on by default, since it apparently
- interferes with scripts
-
-configure.in
- - arrange things so PGRP_PIPE is defined on Linux-2.4+ and version 3
- kernels (ones that apparently schedule children to run before their
- parent)
-
- 4/30
- ----
-builtins/caller.def
- - add call to no_options, so it can handle `--' option
-
-doc/{bash.1,bashref.texi}
- - note explicitly that test, :, true, and false don't understand --
- as meaning the end of options
-
- 5/7
- ---
-support/shobj-conf
- - darwin 8 needs the same LDFLAGS setting as darwin 7
-
-parse.y
- - in save_parser_state, make sure we cast the return value from
- xmalloc() to the right type
- - remove casts to (char *) in calls to yyerror()
-
-lib/readline/signals.c
- - make SIGQUIT and SIGALRM code conditional on their definition
- - use raise() to send a signal if we don't have kill()
-
-lib/readline/display.c
- - some MS-DOS and MINGW changes from the cygwin and mingw folks
-
-config.h.in
- - add HAVE_PWD_H for <pwd.h>
- - add HAVE_FCNTL, HAVE_KILL for respective system calls
- - add HAVE_GETPW{ENT,NAM,UID} for passwd functions
-
-configure.in
- - add check for <pwd.h>
- - add checks for fcntl, kill system calls
- - add checks for getpw{ent,nam,uid} C library functions
- - pass a flag indicating we're cross compiling through to
- CFLAGS_FOR_BUILD in Makefile.in
-
-lib/readline/complete.c
- - guard inclusion of <pwd.h> with HAVE_PWD_H
- - don't provide a missing declaration for getpwent if we don't have it
- - guard calls to {get,end}pwent with HAVE_GETPWENT
-
-lib/readline/shell.c
- - guard inclusion of <pwd.h> with HAVE_PWD_H
- - guard inclusion of <fcntl.h> with HAVE_FCNTL_H
- - don't provide a missing declaration for getpwuid if we don't have it
- - guard calls to getpwuid with HAVE_GETPWUID
- - don't bother with body of sh_unset_nodelay_mode if we don't have
- fcntl
-
-lib/tilde/tilde.c
- - guard inclusion of <pwd.h> with HAVE_PWD_H
- - guard calls to getpw{nam,uid} with HAVE_GETPW{NAM,UID}
- - guard calls to {get,end}pwent with HAVE_GETPWENT
-
-Makefile.in,builtins/Makefile.in
- - @CROSS_COMPILE@ is substituted into CFLAGS_FOR_BUILD (equal to
- -DCROSS_COMPILING if bash is being cross-compiled)
-
- 5/9
- ---
-aclocal.m4
- - print version as `0.0' in RL_LIB_READLINE_VERSION if the
- `rl_gnu_readline_p' variable isn't 1 (accept no imitations)
-
- 5/11
- ----
-lib/readline/rlprivate.h
- - definition of a readline `search context', to be use for incremental
- search initially and other types of search later. Original from
- Bob Rossi as part of work on incremental searching problems when
- using callback interface
-
-lib/readline/isearch.c
- - functions to allocate and free search contexts
- - function to take a search context and a character just read and
- `dispatch' on it: change search parameters, add to search string,
- search further, etc.
- - isearch is now completely context-driven: a search context is
- allocated and passed to the rest of the functions
-
- 5/12
- ----
-lib/readline/isearch.c
- - an additional `isearch cleanup' function that can be called from
- the callback interface functions when the search is to be terminated
- - an additional `isearch callback' function that can be called from
- rl_callback_read_char when input is available
- - short-circuit from rl_search_history after initialization if
- the callback interface is being used
-
-lib/readline/callback.c
- - in rl_callback_read_char(), if RL_STATE_ISEARCH is set, call
- _rl_isearch_callback to read the character and dispatch on it.
- If RL_STATE_ISEARCH is unset when that call returns, and there is
- input pending, call rl_callback_read_char() again so we don't
- have to wait for new input to pick it up
-
-support/shobj-conf,configure.in
- - add support for dragonfly bsd, the same as freebsd
-
- 5/13-5/15
- ---------
-lib/readline/callback.c
- - support for readline functions to `register' a function that will
- be called when more input is available, with a generic data
- structure to encapsulate the arguments and parameters. Primarily
- intended for functions that read a single additional character,
- like quoted-insert
- - support for callback code reading numeric arguments in a loop,
- using readline state and an auxiliary variable
- - support for callback code performing non-incremental searches using
- the same search context struct as the isearch code
-
-lib/readline/{callback,display}.c
- - if a callback function sets `_rl_redisplay_wanted', the redisplay
- function will be called as soon as it returns
-
-lib/readline/input.c
- - changes to _rl_read_mbchar to handle reading the null multibyte
- character and translating it into '\0'
-
-lib/readline/misc.c
- - break rl_digit_loop() into component functions that can be called
- individually from the callback code more easily
- - share some of the functions with rl_digit_loop1() in vi_mode.c
-
-lib/readline/readline.h
- - change the version #defines to reflect readline 5.1
-
-lib/readline/search.c
- - break code into smaller functions that can be composed to work with
- the callback code more easily
-
-lib/readline/text.c
- - in rl_quoted_insert(), don't mess around with the tty signals if
- running in `callback mode'
-
-lib/readline/vi_mode.c
- - changed set-mark, goto-mark, change-char, and char-search to work
- when called by callback functions
-
- 5/17
- ----
-
-lib/readline/rlprivate.h
- - new struct declaration for a `reading key sequence' context
-
-lib/readline/readline.c
- - new variable, _rl_dispatching_keymap, keeps track of which keymap
- we are currently searching
- - functions to allocate and deallocate contexts for reading multi-char
- key sequences
-
- 5/18
- ----
-lib/readline/rlprivate.h
- - new struct defining a context for multiple-key key sequences (the
- base case is escape-prefixed commands)
-
-lib/readline/readline.c
- - change structure of _rl_dispatch_subseq to allow for callback code
- to use it - rudimentary support for supporting the existing
- recursion using a stack of contexts, each with a reference to the
- previous
- - fix so that ^G works when in callback mode
-
-lib/readline/callback.c
- - call the appropriate multiple-key sequence callback if the state is
- set
-
- 5/19
- ----
-lib/readline/readline.c
- - broke code from _readline_internal_char after call to rl_dispatch
- out into separate function: _rl_internal_char_cleanup, callable by
- other parts of the code
- - change _rl_internal_char_cleanup to unset _rl_want_redisplay after
- it calls (*rl_redisplay_func)
-
-lib/readline/callback.c
- - call _rl_internal_char_cleanup from rl_callback_read_char when
- appropriate
-
- 5/24
- ----
-lib/readline/callback.c
- - use _rl_dispatch_callback and a chain of _rl_keyseq_contexts to
- simulate the recursion used to decode multicharacter key sequences
- (even things like ESC- as meta-prefix)
- - call setjmp in rl_callback_read_char to give things like rl_abort
- a place to jump, since the saved location in readline() will not
- be valid
- - keep calling _rl_dispatch_callback from rl_callback_read_char while
- we are still decoding a multi-key key sequence
- - keep calling readline_internal_char from rl_callback_read_char while
- we are reading characters from a macro
-
-lib/readline/macro.c
- - use a slightly different strategy upon encountering the end of a macro
- when using the callback interface: when the last character of a
- macro is read, and we are reading a command, pop the macro off the
- stack immediately so the loop in rl_callback_read_char terminates
- when it should
-
-lib/readline/readline.c
- - if longjmp() is called and we end up at the saved location while
- using the callback interface, just return -- don't go back into a
- blocking read
- - new function to dispose a chain of rl_keyseq_cxts
- - only read new input in _rl_dispatch_callback if the KSEQ_DISPATCHED
- flag is not set in the current keyseq context -- if it is, we are
- traversing the chain back up and should use what we already saved
- - use -3 as a magic value from _rl_dispatch_subseq to indicate that
- we're allocating a new context and moving downward in the chain
- (a special return value for the benefit of _rl_dispatch_callback)
-
-lib/readline/rlprivate.h
- - new extern declaration for _rl_keyseq_chain_dispose
-
- 6/1
- ---
-builtins/read.def
- - fixed a bug that occurred when reading a set number of chars and
- the nth char is a backslash (read one too many). Bug reported by
- Chris Morgan <chmorgan@gmail.com>
-
-execute_cmd.c
- - fix execute_builtin so the `unset' builtin also operates on the
- temporary environment in POSIX mode (as well as source and eval),
- so that unsetting variables in the temporary environment doesn't
- leave them set when unset completes. Report by Eric Blake
- <ebb9@byu.net>
-
-array.c
- - fix from William Park for array_rshift when shifting right on an
- empty array -- corrects calculation of array->max_index
-
-builtins/exec.def
- - if an exec fails and the execfail option is set, don't call
- restart_job_control unless the shell is interactive or job_control
- is set
-
-jobs.c
- - add a run-time check for WCONTINUED being defined in header files
- but rejected with EINVAL by waitpid(). Fix from Maciej Rozycki
- <macro@linux-mips.org>
-
- 6/20
- ----
-bashhist.c
- - make sure calls to sv_histchars are protected by #ifdef BANG_HISTORY
- - ditto for calls to history_expand_line_internal
-
- 6/23
- ----
-doc/bashref.texi
- - remove extra blank lines in @menu constructs
-
-variables.c
- - assign export_env to environ (extern char **) every time it changes
- (mostly in add_to_export_env define), so maybe getenv will work on
- systems that don't allow it to be replaced
-
- 6/29
- ----
-bashline.c
- - in bash_directory_completion_hook, be careful about not turning `/'
- into `//' and `//' into `///' for benefit of those systems that treat
- `//' as some sort of `network root'. Fix from Eric Blake
- <ebb9@byu.net>
-
-lib/readline/complete.c
- - in to_print, do the right thing after stripping the trailing slash
- from full_pathname: // doesn't turn into /, and /// doesn't become
- //. Fix from Eric Blake <ebb9@byu.net>
-
- 6/30
- ----
-lib/malloc/trace.c
- - include <unistd.h> if it's available for a definition of size_t
-
-jobs.c
- - in wait_for, if a child process is marked as running but waitpid()
- returns -1/ECHILD (e.g., when the bash process is being traced by
- strace), make sure to increment c_reaped when marking the child as
- dead
- - in without_job_control, make sure to close the pgrp pipe after
- calling start_pipeline
-
- 7/1
- ---
-Makefile.in
- - only remove pathnames.h when the other files created by running
- configure are removed (e.g., Makefile). Fix from William Park
-
-lib/sh/shquote.c
- - since backslash-newline disappears when within double quotes, don't
- add a backslash in front of a newline in sh_double_quote. Problem
- reported by William Park
-
-jobs.c
- - in notify_of_job_status, don't print status messages about
- terminated background processes unless job control is active
-
-bashhist.c
- - new variable, hist_last_line_pushed, set to 0 in really_add_history
- (used by `history -s' code)
-
-bashhist.h
- - new extern declaration for history -s
-
-builtins/history.def
- - don't remove last history entry in push_history if it was added by
- a call to push_history -- use hist_last_line_pushed as a sentinel
- and set it after adding history entry. This allows multiple
- calls to history -s to work right: adding all lines to the history
- rather than deleting all but the last. Bug reported by Matthias
- Schniedermeyer <ms@citd.de>
- - pay attention to hist_last_line_pushed in expand_and_print_history()
- so we don't delete an entry pushed by history -s
-
- 7/4
- ---
-print_cmd.c
- - fix print_arith_for_command to not print so many blanks between
- expressions in ((...))
-
-command.h
- - new word flag: W_DQUOTE. Means word should be treated as if double
- quoted
-
-make_cmd.c
- - add W_DQUOTE to word flags in make_arith_for_expr
-
-parse.y
- - add W_DQUOTE to word flags for (( ... )) arithmetic commands
-
-subst.c
- - don't perform tilde expansion on a word with W_DQUOTE flag set
- - don't perform process substitution on a word with W_DQUOTE flag set
-
-arrayfunc.c
- - expand an array index within [...] the same way as an arithmetic
- expansion between (( ... ))
-
-lib/readline/input.c
- - use getch() instead of read() on mingw
-
-lib/readline/readline.c
- - add a few key bindings for the arrow keys on mingw
-
-lib/readline/rldefs.h
- - if on mingw, define NO_TTY_DRIVER
-
-lib/readline/rltty.c
- - compile in the stub functions for _rl_{disable,restore}_tty_signals
- if on mingw
- - compile in stub function for rl_restart_output on mingw
- - make sure enough functions and macros are defined to compile if
- NO_TTY_DRIVER is defined (lightly tested - builds on MacOS X, at
- least)
-
- 7/7
- ---
-command.h
- - add a `flags' member to the PATTERN_LIST structure
-
-make_cmd.c
- - intialize the `flags' member of a PATTERN_LIST when it's created
-
-builtins/psize.c
- - protect extern declaration of errno with usual #ifdef errno
-
-configure.in, variables.c
- - changes for QNX 6.x
-
- 7/9
- ---
-parse.y
- - fix parse_matched_pair to handle single and double quoted strings
- inside old-style command substitution (``) since they can each
- quote the ` and embedded $-expansions. Report by Eric Blake
- <ebb9@byu.net>
-
-{configure,Makefile}.in
- - TILDE_LIB is now substituted into Makefile by configure
-
-configure.in
- - if configuring --with-installed-readline on cygwin, set TILDE_LIB
- to the empty string to avoid multiply-defined symbols. Cygwin
- doesn't allow undefined symbols in dynamic libraries. Report by
- Eric Blake <ebb9@byu.net>
-
- 7/11
- ----
-input.c
- - in duplicate_buffered_stream, don't call free_buffered_stream if the
- two buffered streams share the same b_buffer object (e.g., if they
- had already been duplicated with a previous call). Fixes Debian bug
- reported by eero17@bigfoot.com
-
- 7/12
- ----
-shell.c
- - make set_shell_name more resistant to a NULL argument
- - in bind_args, use < instead of != when counting the arguments and
- making the arg list
- - in main(), make sure arg_index is not initialized to a value greater
- than argc
-
- 7/14
- ----
-lib/readline/display.c
- - in expand_prompt, don't set the location of the last invisible
- char if the sequence is zero length (\[\])
-
- 7/15
- ----
-doc/{bash.1,bashref.texi}
- - document that the shell uses $TMPDIR when creating temporary files
-
- 7/20
- ----
-[bash-3.1-alpha1 frozen]
-
- 7/29
- ----
-builtins/evalstring.c
- - make sure that parse_and_execute saves and restores the value of
- loop_level, so loops in sourced scripts and eval'd strings don't
- mess up the shell's parser state
-
-bashline.c
- - change command_subst_completion_function to suppress appending
- any character to a unique completion, instead of a space, unless
- the last word in the quoted command substitution completes to a
- directory name. In that case we append the expected slash
-
- 8/1
- ---
-builtins/printf.def
- - make sure variables are initialized if their values are tested later
-
-[bash-3.1-alpha1 updated and re-frozen]
-
- 8/2
- ---
-variables.c
- - make sure to call stifle_history with an `int' instead of an intmax_t.
- Sometimes it makes a difference
-
- 8/3
- ---
-[bash-3.1-alpha1 released]
-
-support/mksignames.c
- - add `SIGSTKFLT' (RHE3)
- - add `SIGXRES' (Solaris 9)
-
- 8/4
- ---
-builtins/ulimit.def
- - fix typo to make `x' the right option for locks
- - add new options to short help synopsis
-
-variables.c
- - use get_variable_value instead of direct reference to value_cell
- in make_variable_value when appending to the current value, so
- references to array variables without subscripts will be equivalent
- to element 0
-
-lib/readline/text.c
- - rewrote rl_change_case to correctly change the case of multibyte
- characters where appropriate
-
- 8/5
- ---
-configure.in
- - remove call to obsolete macro AC_ACVERSION
- - remove special calls to AC_CYGWIN and AC_MINGW32; AC_CANONICAL_HOST
- takes care of those cases
-
-general.h
- - include `chartypes.h' for definition of ISALPHA
- - fix definitions of ABSPATH and RELPATH for cygwin
- - fix definition of ISDIRSEP for cygwin to allow backslash as a
- directory name separator
-
- 8/9
- ---
-builtins/setattr.def
- - when setting a variable from the temporary environment in
- set_var_attribute (e.g., `LC_ALL=C export LC_ALL'), make sure to
- call stupidly_hack_special_variables after binding the variable in
- the current context
-
-builtins/printf.def
- - make sure to call stupidly_hack_special_variables if using `printf -v'
- to put formatted output in a shell variable
-
- 8/11
- ----
-support/shobj-conf
- - new variable: SHLIB_LIBPREF, prefix for shared library name (defaults
- to `lib'
- - new variable: SHLIB_DLLVERSION, used on Cygwin to set the library
- version number
- - new variable: SHLIB_DOT, separator character between library name and
- suffix and version information (defaults to `.')
- - new stanza for cygwin to generate windows-compatible dll
-
- 8/14
- ----
-variables.c
- - new special variable function for Cygwin, so the export environment
- is remade when HOME is changed. The environment is the only way to
- get information from the shell to cygwin dlls, for instanace, when
- bash is compiled to use an already-installed libreadline
-
-variables.h
- - new extern declaration for sv_home
-
- 8/15
- ----
-lib/readline/display.c
- - call init_line_structures from rl_redisplay if vis_lbreaks == 0
- to avoid consequences of a poorly-timed SIGWINCH
-
- 8/16
- ----
-subst.c
- - fix logic for performing tilde expansion when in posix mode (don't
- rely on W_TILDEEXP flag always being set, because it won't be when
- expanding the RHS of assignment statement). Use W_TILDEEXP only
- when deciding to expand a word marked as W_ASSIGNMENT that doesn't
- precede a command name
-
- 8/17
- ----
-execute_cmd.c
- - in execute_function, when subshell == 1, don't short-cut by using
- the command contained in the group command -- if you do, any
- redirections attached to the group command (function) don't get
- executed
-
-general.h
- - new #define, FS_READABLE, indicates file is readable by current
- user
-
-findcmd.c
- - rewrote file_status to use S_xxx POSIX file mode bits and to add
- support for FS_READABLE (affects ./source and searching $PATH for
- scripts whose names are supplied as arguments on the command line)
- - change find_path_file to look for readable files -- source requires
- it
- - change find_in_path_element to do the right thing when FS_READABLE
- is supplied as a flag
-
-doc/bashref.texi
- - remove note about posix non-compliance in `.': we now require and
- look for readable files when searching $PATH
-
- 8/20
- ----
-subst.c
- - fix setifs to handle case where passed variable is non-zero but
- v->value == 0 (as in an unset local variable); treat IFS as unset
- in this case
-
-jobs.c
- - in kill_pid, if asked to killpg a process or pgrp whose pgrp is
- recorded as the same as the shell's, just call killpg and let the
- chips fall where they may -- there may be other processes in that
- pgrp that are not children of the shell, so killing each process
- in the pipeline will not do a complete job, and killpg'ing each
- such process will send too many signals in the majority of cases
-
-builtins/cd.def
- - in posix mode, pwd needs to check that the value it prints and `.'
- are the same file
-
-builtins/read.def
- - if reading input from stdin in a non-interactive shell and calling
- `read', call sync_buffered_stream to seek backward in the input
- stream if necessary (XXX - should we do this for all shell builtins?)
-
- 8/23
- ----
-builtins/cd.def
- - in posix mode, if canonicalization of the absolute pathname fails
- because the path length exceeds PATH_MAX, but the length of the passed
- (non-absolute) pathname does not, attempt the chdir, just as when
- not in posix mode
-
-builtins/type.def
- - don't have describe_command call sh_makepath if the full path found
- is already an absolute pathname (sh_makepath will stick $PWD onto the
- front of it)
-
- 8/24
- ----
-
-jobs.c
- - in posix mode, don't have start_job print out and indication of
- whether the job started by `bg' is the current or previous job
- - change start_job to return success if a job to be resumed in the
- background is already running. This means that bg won't fail when
- asked to bg a background job, as SUSv3/XPG6 requires
- - new function, init_job_stats, to zero out the global jobstats struct
-
-{jobs,nojobs}.c
- - change kill_pid to handle pids < -1 by killing process groups
-
-jobs.h
- - extern declaration for init_job_stats
-
-lib/readline/history.c
- - check whether or not the history list is null in remove_history
-
-builtins/history.def
- - delete_last_history is no longer static so fc builtin can use it
-
-builtins/fc.def
- - use free_history_entry in fc_replhist instead of freeing struct
- members individually
- - call delete_last_history from fc_replhist instead of using inline
- code
- - if editing (-l not specified), make sure the fc command that caused
- the editing is removed from the history list, as POSIX specifies
-
-builtins/kill.def
- - just call kill_pid with any pid argument and let it handle pids < -1
- This is the only way to let kill_pid know whether a negative pid or
- a job spec was supplied as an argument to kill
-
-builtins/fg_bg.def
- - force fg_bg to return EXECUTION_SUCCESS explicitly if called by bg
- and start_job returns successfully
- - bg now returns success only if all the specified jobs were resumed
- successfully
-
-execute_cmd.c
- - call init_job_stats from initialize_subshell to zero out the global
- job stats structure
-
- 8/25
- ----
-bashline.c
- - change vi_edit_and_execute_command to just call vi when in posix
- mode, instead of checking $FCEDIT and $EDITOR
-
-lib/readline/search.c
- - if in vi_mode, call rl_free_undo_list in make_history_line_current
- to dispose of undo list accumulated while reading the search string
- (if this isn't done, since vi mode leaves the current history
- position at the entry which matched the search, the call to
- rl_revert_line in rl_internal_teardown will mangle the matched
- history entry using a bogus rl_undo_list)
- - call rl_free_undo_list after reading a non-incremental search string
- into rl_line_buffer -- that undo list should be discarded
-
-lib/readline/rlprivate.h
- - add UNDO_LIST * member to search context struct
-
-lib/readline/isearch.c
- - initialize UNDO_LIST *save_undo_list member of search context struct
-
- 8/27
- ----
-lib/readline/bind.c
- - change rl_parse_and_bind to strip whitespace from the end of a
- variable value assignment before calling rl_variable_bind
-
-doc/bash.1,lib/readline/doc/{rluser.texi,readline.3}
- - clarified the language concerning parsing values for boolean
- variables in assignment statements
-
- 8/28
- ----
-lib/sh/pathphys.c
- - fix small memory leak in sh_realpath reported by Eric Blake
-
- 8/31
- ----
-doc/bashref.texi
- - add additional notes to posix mode section
-
- 9/3
- ---
-parse.y
- - if $'...' occurs within a ${...} parameter expansion within
- double quotes, don't single-quote the expanded result -- the double
- quotes will cause it to be expanded incorrectly
-
- 9/4
- ---
-builtins/fc.def
- - if STRICT_POSIX is defined, the posix mode default for the editor to
- use is $FCEDIT, then ed
-
-shell.c
- - if STRICT_POSIX is defined, initialize `posixly_correct' to 1
-
-config.h.in
- - add #undef STRICT_POSIX
-
- 9/5
- ---
-configure.in
- - add new option argument, --enable-strict-posix-default, configures
- bash to be posix-conformant (including defaulting echo to posix
- conformance) by default
-
-builtins/echo.def
- - if STRICT_POSIX is defined, default echo to xpg-style
-
-doc/bashref.texi
- - describe the --enable-strict-posix-default option to configure
-
- 9/10
- ----
-builtins/mkbuiltins.c
- - change to not generate N_(""), because the translated empty string is
- special to GNU gettext
-
- 9/13
- ----
-lib/readline/complete.c
- - a negative value for rl_completion_query_items means to not ask
-
-lib/readline/doc/{{rltech,rluser}.texi,readline.3}
- - documented new semantics for rl_completion_query_items/
- completion-query-items
-
- 9/14
- ----
-bashline.c
- - bind M-TAB in emacs mode to dynamic-complete-history even if the
- current binding is `tab-insert' (which is what it is by default),
- not just if it's unbound
-
- 9/15
- ----
-eval.c
- - call QUIT before calling dispose_command on current_command after
- the `exec_done' label. If we dispose current_command first, the
- longjmp might restore the value of current_command after we've
- disposed it, and the subsequent call to dispose_command from the
- DISCARD case will free memory twice
-
- 9/16
- ----
-lib/sh/strto[iu]max.c
- - make sure the function being declared is not a cpp define before
- defining it -- should fix problems on HP-UX
-
- 9/19
- ----
-Makefile.in
- - make sure the binaries for the tests are at the front of $PATH
-
- 9/22
- ----
-parse.y
- - new flag for parse_matched_pair: P_COMMAND, indicating that the
- text being parsed is a command (`...`, $(...))
- - change calls to parse_matched_pair to include P_COMMAND where
- appropriate
- - if P_COMMAND flag is set and the text is unquoted, check for comments
- and don't try to parse embedded quoted strings if in a comment (still
- not exactly right yet)
-
- 9/24
- ----
-builtins/history.def
- - if running history -n, don't count these new lines as history lines
- for the current session if the `histappend' shell option is set.
- If we're just appending to the history file, the issue that caused
- history_lines_this_session to be recalculated doesn't apply -- the
- history file won't be missing any entries
-
-lib/readline/isearch.c
- - fix C-w handler for isearch string reader to handle multibyte chars
-
-lib/readline/rlmbutil.h
- - new defines for _rl_to_wupper and _rl_to_wlower
-
-lib/readline/text.c
- - use _rl_to_wupper and _rl_to_wlower as appropriate
-
- 9/26
- ----
-execute_cmd.c
- - in shell_execve, if the exec fails due to E2BIG or ENOMEM, just print
- the appropriate error message instead of checking out any interpreter
- specified with #!
-
- 9/30
- ----
-bashhist.c
- - make $HISTCMD available anytime remember_on_history is non-zero,
- which indicates that we're saving commands to the history, and
- let it evaluate to 1 if we're not
-
- 10/4
- ----
-lib/sh/snprintf.c
- - in floating(), make sure d != 0 before calling chkinfnan -- gcc on the
- version of Solaris 9 I have translates 0 to -inf on the call
-
-[bash-3.1-beta1 frozen]
-
- 10/6
- ----
-jobs.c
- - set the_pipeline to NULL right away in cleanup_the_pipeline, and
- dispose a copy of the pointer so we don't mess with the_pipeline
- while we're in the process of destroying it
- - block and unblock SIGCHLD around manipulating the_pipeline in
- cleanup_the_pipeline
-
- 10/7
- ----
-[bash-3.1-beta1 released]
-
-lib/readline/isearch.c
- - when switching directions, make sure we turn off the SF_REVERSE
- flag in the search context's flags word if we're going from reverse
- to forward i-search
-
-lib/readline/bind.c
- - new function, rl_variable_value, returns a string representing a
- bindable readline variable's value
- - new auxiliary function, _rl_get_string_variable_value, encapsulates
- everything needed to get a bindable string variable's value
- - rewrote rl_variable_dumper to use _rl_get_string_variable_value
-
-lib/readline/readline.h
- - new extern declaration for rl_variable_value
-
-lib/readline/doc/rltech.texi
- - documented rl_variable_value
-
-bashline.c
- - in command_word_completion_function, if readline sets
- rl_completion_found_quote, but doesn't set rl_completion_quote_character,
- we have an embedded quoted string or backslash-escaped character in
- the passed text. We need to dequote that before calling
- filename_completion_function. So far, this is in place only for
- absolute program names (those containing a `/')
- - in command_word_completion_function, use rl_variable_value to decide
- whether or not we should ignore case, and use strncasecmp instead of
- strncmp where appropriate
-
- 10/11
- -----
-builtins/fc.def
- - fixed a typo when using POSIX_FC_EDIT_COMMAND
-
-redir.h
- - new flag values for redirections: RX_INTERNAL and RX_USER (currently
- unused)
-
-redir.c
- - add_undo_redirect and add_undo_close_redirect now set RX_INTERNAL
- flag when making new redirects
- - in do_redirection_internal, only set file descriptors > 2 to CLEXEC
- if they're marked as RX_INTERNAL
-
- 10/12
- -----
-jobs.c
- - in wait_for_single_pid, if in posix mode, remove the waited-for pid
- from the list of background pids, forgetting it entirely. POSIX
- conformance tests test for this.
-
-lib/readline/{readline.h,vi_mode.c}
- - new state flag, RL_STATE_VICMDONCE, set after entering vi command
- mode the first time; reset on each call to readline()
-
- 10/13
- -----
-lib/readline/undo.c
- - in rl_revert_line, make sure that revert-line in vi mode leaves
- rl_point set to 0 no matter the state of the line buffer
-
-lib/readline/vi_mode.c
- - when entering vi_command mode for the first time, free any existing
- undo list so the previous insertions won't be undone by the `U'
- command. This is how POSIX.2 says `U' should work (and the test
- suite tests for it)
-
-lib/readline/bind.c
- - change rl_parse_and_bind so only `set' commands involving boolean
- readline variables have trailing whitespace stripped from the value
- string
-
- 10/16
- -----
-lib/glob/sm_loop.c
- - fix patscan() to correctly scan backslash-escaped characters
-
- 10/18
- -----
-lib/sh/{winsize.c,Makefile.in},{jobs,nojobs}.c,Makefile.in,externs.h
- - moved get_new_window_size from jobs.c/nojobs.c to new file,
- lib/sh/winsize.c, made function global
-
-{jobs,nojobs,sig}.c,{jobs,sig}.h
- - moved SIGWINCH handling code to sig.c rather than duplicate it in
- jobs.c and nojobs.c
- - call set_sigwinch_handler from sig.c code rather than job control
- signal initialization
-
-sig.[ch]
- - new variable, sigwinch_received, acts like interrupt_state for
- SIGWINCH, set by sigwinch_sighandler. sigwinch_sighandler no longer
- calls get_new_window_size
-
-parse.y
- - add call to get_new_window_size if sigwinch_received at top of
- shell_getc
-
- 10/19
- -----
-lib/malloc/malloc.c
- - to avoid orphaning memory on free if the right bucket is busy, use a
- new function xplit(mem, bucket) to split the block into two or more
- smaller ones and add those to the right bucket (appropriately marking
- it as busy)
- - audit bsplit(), bcoalesce(), and xsplit() for proper use of busy[],
- since they're dealing with two separate buckets
-
- 10/22
- -----
-subst.c
- - new flag for string_extract: EX_REQMATCH, means to return an error
- if a matching/closing character is not found before EOS
- - new static flag variables: extract_string_error and extract_string_fatal
- - change expand_word_internal to check for new error returns from
- string_extract and return errors if appropriate
-
- 10/23
- -----
-builtins/cd.def
- - make sure we free TDIR in change_to_directory after calling
- set_working_directory (which allocates new memory) and other places
- we short-circuit and return
-
- 10/24
- -----
-subst.c
- - modified fix from 10/22 to allow bare ` to pass through (for
- some backwards compatibility and more correctness)
-
- 10/27
- -----
-conftypes.h
- - make MacOS X use the RHAPSODY code that gets HOSTTYPE, et al.
- at build rather than configure time, to support universal binaries
- (fix from llattanzi@apple.com)
-
- 10/30
- -----
-builtins/evalstring.c
- - make sure we don't turn on CMD_NO_FORK in parse_and_execute if
- we're running a trap command on signal receipt or exit
-
-execute_cmd.c
- - in shell_execve, improve the error message a little bit if the
- interpreter name in a #! exec header ends with a ^M (as in a DOS-
- format file)
-
- 11/1
- ----
-lib/readline/vi_mode.c
- - fix vi-mode `r' command to leave the cursor in the right place
-
-[bash-3.1-rc1 frozen]
-
- 11/5
- ----
-execute_cmd.c
- - make sure a DEBUG trap doesn't overwrite a command string passed to
- make_child in execute_simple_command
-
-bashline.c
- - rearrange some code in bash_quote_filename so filenames with leading
- tildes containing spaces aren't tilde-expanded before being
- returned to the caller
-
- 11/6
- ----
-lib/readline/display.c
- - when deciding where to move the cursor in rl_redisplay and needing
- to move the cursor back after moving it vertically and compensate
- for invisible characters in the prompt string, make sure that
- _rl_last_c_pos is treated as an absolute cursor position in a
- multibyte locale and the wrap offset (number of invisible characters)
- is added explicitly when deciding how many characters to backspace
-
- 11/10
- -----
-lib/readline/terminal.c
- - _rl_set_screen_size now interprets a lines or columns argument < 0
- as an indication not to change the current value
-
- 11/11
- -----
-
-lib/readline/terminal.c
- - new function, rl_reset_screen_size, calls _rl_get_screen_size to
- reset readline's idea of the terminal size
- - don't call _rl_get_screen_size in _rl_init_terminal_io if both
- _rl_screenheight and _rl_screenwidth are > 0
- - don't initialize _rl_screenheight and _rl_screenwidth to 0 in
- _rl_init_terminal_io; let caller take care of it
- - set _rl_screenheight and _rl_screenwidth to 0 before calling
- _rl_init_terminal_io
-
-lib/readline/readline.h
- - new extern declaration for rl_reset_screen_size
-
-lib/readline/doc/rltech.texi
- - documented rl_reset_screen_size
-
-variables.c
- - if readline is being used, compile in a special var function for
- assignments to LINES and COLUMNS that calls rl_set_screen_size or
- rl_reset_screen_size as appropriate. Only do this in posix mode
- and only when STRICT_POSIX is defined at compile time
- - new semaphore variable, winsize_assignment, set while doing an
- assignment to LINES or COLUMNS
- - new variable, winsize_assigned, says LINES or COLUMNS was assigned
- to or found in the environment
- - if in the middle of an assignment to LINES or COLUMNS, make
- sh_set_lines_and_columns a no-op
-
-lib/sh/winsize.c
- - get_new_window_size now takes two int * arguments, to return the
- screen dimensions
-
-externs.h
- - change extern declaration for get_new_window_size
-
-{jobs,nojobs}.c, parse.y
- - change callers of get_new_window_size
-
- 11/12
- -----
-lib/readline/terminal.c
- - new variable, rl_prefer_env_winsize, gives LINES and COLUMNS
- precedence over values from the kernel when computing window size
-
-lib/readline/readline.h
- - extern declaration for rl_prefer_env_winsize
-
-lib/readline/doc/rltech.texi
- - document rl_prefer_env_winsize
-
- 11/13
- -----
-lib/readline/rltty.c
- - change rl_prep_terminal to make sure we set and reset the tty
- special characters in the vi insertion keymap if in vi mode. This
- matters if we get accept-line for the previous line while in vi
- command mode
-
- 11/14
- -----
-builtins/pushd.def
- - make sure any call to cd_builtin includes a leading `--' from the
- argument list (or constructs one)
-
- 11/16
- -----
-pcomplete.c
- - fix small memory leak in gen_wordlist_matches
-
-[bash-3.1-rc2 frozen]
-
- 11/21
- -----
-[bash-3.1-rc2 released]
-
- 11/23
- -----
-lib/readline/display.c
- - changes to rl_redisplay to compensate for update_line updating
- _rl_last_c_pos without taking invisible characters in the line into
- account. Important in multibyte locales where _rl_last_c_pos is an
- absolute cursor position
- - changes to _rl_move_cursor_relative to account for _rl_last_c_pos
- being an absolute cursor position in a multibyte character locale
- - rewrote _rl_move_cursor_relative to make it a little simpler
-
- 11/29
- -----
-lib/readline/display.c
- - changes to rl_redisplay and update_line for update_line to communicate
- upward that it took the number of invisible characters on the current
- line into account when modifying _rl_last_c_pos
- - in update_line, adjust _rl_last_c_pos by wrap_offset before calling
- _rl_move_cursor_relative, so we pass correct information about the
- true cursor position
-
- 12/1
- ----
-configure.in
- - changed release status to `release'
-
-[bash-3.1 frozen]
-
- 12/8
- ----
-[bash-3.1 released]
-
- 12/9
- ----
-doc/{bash.1,version.texi},lib/readline/doc/version.texi
- - remove `beta1' from man page footer and texinfo documents
-
-variables.c
- - make sure winsize_assignment is protected by #ifdef READLINE, so
- minimal shell will compile
-
-builtins/read.def
- - make sure error cases free memory and run any unwind-protects to
- avoid memory leaks
-
- 12/10
- -----
-execute_cmd.c
- - change execute_command_internal to set $PIPESTATUS for ((...)) and
- [[ ... ]] commands
-
-doc/{bash.1,bashref.texi,version.texi}
- - add documentation for ulimit -[iqx] and bump revision date
-
- 12/12
- -----
-parse.y
- - make sure parse_compound_assignment saves and restores the
- PST_ASSIGNOK parser state flag around its calls to read_token.
- Fixes bug reported by Mike Frysinger
-
- 12/13
- -----
-parse.y
- - change parse_compound_assignment to save and restore the value of
- last_read_token. Not sure why it was set unconditionally in the
- first place after parsing the complete compound assignment
-
- 12/14
- -----
-lib/readline/text.c
- - don't use return value of rl_kill_text (which always succeeds and
- returns the number of characters killed) in rl_delete as an indication
- of success or failure
- - ditto for return value of rl_delete_text
-
-lib/readline/readline.c
- - don't return the value of the called readline function as the return
- value from _rl_dispatch_subseq; -1 means something different to the
- callers (return 0 all the time to indicate that a readline function
- was found and dispatched). Fix from Andreas Schwab for <DEL><DEL>
- bug in callback interface first reported by Mike Frysinger
-
-execute_cmd.c
- - fixed a typo in execute_case_command
-
- 12/15
- -----
-aclocal.m4
- - add check for wctype() to BASH_CHECK_MULTIBYTE, define HAVE_WCTYPE
-
-config.h.in
- - add HAVE_WCTYPE #define
-
-config-bot.h
- - add HAVE_WCTYPE to the set of checks for HANDLE_MULTIBYTE. This
- should catch the deficient NetBSD multibyte support
-
- 12/16
- -----
-parse.y
- - use CTLESC instead of literal '\001' when decode_prompt_string
- prefixes RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE
-
- 12/20
- -----
-lib/readline/display.c
- - don't treat RL_PROMPT_START_IGNORE specially inside a sequence of
- ignored characters
- - keep track of the start of the current sequence of ignored
- characters; make sure that an empty sequence of such characters
- really is an empty sequence, not one that happens to end with '\001'
- (RL_PROMPT_START_IGNORE)
-
- 12/21
- -----
-subst.c
- - change expand_word_internal to process rest of `tilde-word' as a
- regular part of the word if tilde expansion leaves the tilde-word
- unchanged. This means that ~$USER expands to ~chet, which seems
- more intuitive, and is effectively what bash-3.0 did
-
- 12/23
- -----
-subst.c
- - when making a local array variable in do_compound_assignment, make
- sure that we don't use a variable of the same name from a previous
- context
-
-doc/bash.1
- - documented expansions for word and patterns in case statement
-
-builtins/ulimit.def,doc/{bashref.texi,bash.1}
- - added new -e and -r (nice and rtprio) options to ulimit; documented
- them
-
- 12/26
- -----
-variables.c
- - use `hmax' instead of `num' in sv_histsize to avoid integer overflow
- problems with intmax_t
-
-builtins/read.def
- - add unwind-protect to restore rl_attempted_completion_function in
- case of a timeout
-
-{bashline,variables}.c
- - move initialization of HISTSIZE from initialization path to
- load_history, so it can be overridden by a value assigned in a
- startup file
-
-lib/readline/misc.c
- - add a missing `return r' so that rl_digit_loop returns a meaningful
- value
-
-lib/readline/{bind,callback,display,isearch,rltty,search,text,vi_mode}.c
- - minor cleanups to satisfy compiler warnings, mostly removing unused
- variables
-
- 12/27
- -----
-support/Makefile.in
- - add LIBS_FOR_BUILD support; defaults to ${LIBS}
-
-Makefile.in
- - add LIBS_FOR_BUILD with no default value; use when linking programs
- using CC_FOR_BUILD (e.g., bashversion)
-
- 12/28
- -----
-lib/readline/bind.c
- - fix rl_translate_keyseq bad translation of \M-\C-x sequences
-
-execute_cmd.c
- - in execute_arith_command, if the expression expands to more than one
- word, make sure we join the words into a single string and pass the
- entire thing to evalexp()
-
-expr.c
- - new functions: _is_arithop(c), returns true if C is a valid single-
- character arithmetic operator; _is_multiop(c), returns true if C is
- a token corresponding to a valid multi-character arithmetic operator
- - if we encounter a character that isn't a valid arithmetic
- operator, throw an error. Try to be intelligent about what type of
- error message to print
-
-subst.c
- - new function, expand_arith_string, calls expand_string_if_necessary;
- used where an arithmetic expression needs to be expanded
-
-subst.h
- - new extern declaration for expand_arith_string
-
-arrayfunc.c
- - in array_expand_index, call expand_arith_string to expand the
- subscript in a fashion consistent with other arithmetic expressions
-
-subst.c
- - fix parameter_brace_patsub so that we don't try to anchor the pattern
- at the beginning or end of the string if we're doing global
- replacement -- that combination doesn't doesn't make sense, and
- the changed behavior is compatible with ksh93
-
-doc/{bash.1,bashref.texi}
- - changed description of pattern substitution to match the new
- semantics
-
-tests/new-exp.tests
- - change tests to remove all ${pat//#rep} and ${pat//%rep}
- expansions, since they don't mean the same thing anymore
-
- 12/29
- -----
-support/signames.c
- - new file, initialize_signames() function from old mksignames.c. This
- file builds the signal_names array
-
-support/mksignames.c
- - strip out initialize_signames(), move to signames.c. This file only
- writes signames.h
- - set up to only write a stub signames.h if CROSS_COMPILING is defined,
- with extern declaration for initialize_signames
- - if not cross compiling, #define initialize_signames to nothing
-
-Makefile.in
- - mksignames is now linked from mksignames.o and buildsignames.o
- - add rules to build signames.o, assuming we're building it as part
- of the shell (cross-compiling)
-
-trap.c
- - call initialize_signames from initialize_traps
-
-configure.in
- - set SIGNAMES_O to nothing (normal) or signames.o (cross-compiling),
- substitute into Makefile
- - don't set SIGNAMES_H if cross-compiling any more
-
- 12/30
- -----
-command.h
- - new word flag: W_NOPROCSUB, inhibits process substitution on a word
-
-subst.c
- - change expand_word_internal to suppress process substitution if the
- word has the W_NOPROCSUB flag
-
-shell.c
- - --wordexp turns on W_NOPROCSUB in addition to W_NOCOMSUB
-
-subst.c
- - change string_list_dollar_at and string_list_dollar_star so that
- MB_CUR_MAX is used to size an array only when using gcc, since gcc
- can handle non-constant array sizes using a mechanism like alloca.
- Other compilers, e.g. Sun's compiler, do not implement that
- extension
-
- 12/31
- -----
-builtins/mkbuiltins.c
- - when cross-compiling, don't include <config.h>, since it's for the
- target rather than the host system. Instead, choose a reasonable
- set of default #defines based on a minimal POSIX system
-
-jobs.c
- - change find_process to handle a NULL return value from find_pipeline
- - return immediately from delete_job if jobs[index] is already NULL or
- if it has a null pipeline associated with it
- - in delete_job, if find_last_proc returns NULL, don't try to call
- bgp_delete
-
- 1/7/2006
- --------
-doc/bash.1
- - patch from Tim Waugh to replace some literal single quotes with
- \(aq, the groff special character for it
-
-jobs.c
- - in realloc_jobs_list, make sure to zero out slots after j_lastj
- in the new list
-
- 1/9
- ---
-support/mksignames.c
- - make sure to include <signal.h> to get right value of NSIG from
- (usually) <sys/signal.h>
-
- 1/10
- ----
-parse.y
- - when calling parse_matched_pair on a $(...) command substitution,
- don't pass the P_DQUOTE flag so that single quotes don't get
- stripped from $'...' inside the command substitution. Bug report
- and fix from Mike Stroyan <mike.stroyan@hp.com>
-
-jobs.c
- - start maintaining true count of living children in js.c_living
- - call reset_current in realloc_jobs_list, since old values for current
- and previous job are most likely incorrect
- - don't allocate a new list in realloc_jobs_list if the old size and
- new size are the same; just compact the existing list
- - make sure realloc_jobs_list updates value of js.j_njobs
- - add some more itrace messages about non-null jobs after j_lastj in
- jobs array
-
- 1/11
- ----
-bashjmp.h
- - new value for second argument to longjmp: SIGEXIT. Reserved for
- future use
-
- 1/12
- ----
-jobs.c
- - add logic to make_child to figure out when pids wrap around
- - turn second argument to delete_job into flags word, added flag to
- prevent adding proc to bgpids list
-
- 1/13
- ----
-lib/readline/vi_mode.c
- - move code that moves forward a character out of rl_vi_append_mode
- into a separate function, _rl_vi_append_forward
- - change _rl_vi_append_mode to save `a' as the last command, so it
- can be redone properly
- - new function _rl_vi_backup, moves point back a character taking
- multibyte locales into account
- - change rl_vi_redo to handle redoing an `a' command specially --
- it should be redone like `i' but after moving forward a character
- - change rl_vi_redo to use _rl_vi_backup to move point backward
- after redoing `i' or `a'
-
-jobs.c
- - new function, delete_old_job (pid), checks whether or not PID is in
- a job in the jobs list. If so, and the job is dead, it just removes
- the job from the list. If so, and the job is not dead, it zeros
- the pid in the appropriate PROCESS so pid aliasing doesn't occur
- - make_child calls delete_old_job to potentially remove an already-used
- instance of the pid just forked from the jobs list if pids have
- wrapped around. Finally fixes the bug reported by Tim Waugh
- <twaugh@redhat.com>
-
-trap.c
- - new define, GETORIGSIG(sig), gets the original handling for SIG and
- sets SIG_HARD_IGNORE if that handler is SIG_IGN
- - call GETORIGSIG from initialize_traps, get_original_signal, and
- set_signal
-
-jobs.c
- - in wait_for, if the original SIGINT handler is SIG_IGN, don't set
- the handler to wait_sigint_handler. This keeps scripts started in
- the background (and ignoring SIGINT) from dying due to SIGINT while
- they're waiting for a child to exit. Bug reported by Ingemar
- Nilsson <init@kth.se>
-
-lib/readline/vi_mode.c
- - don't save text to buffer unless undo pointer points to a record of
- type UNDO_INSERT; zero it out instead. This fixes bug reported by
- Craig Turner <craig@synect.com> with redoing `ctd[ESC]' (empty
- insert after change to)
-
-shell.c
- - change set_shell_name so invocations like "-/bin/bash" are marked as
- login shells
-
-doc/bash.1
- - add note about destroying functions with `unset -f' to the section
- on shell functions
-
-lib/readline/terminal.c
- - if readline hasn't been initialized (_rl_term_autowrap == -1, the
- value it's now initialized with), call _rl_init_terminal_io from
- _rl_set_screen_size before deciding whether or not to decrement
- _rl_screenwidth. Fixes bug from Mike Frysinger <vapier@gentoo.org>
-
- 1/14
- ----
-lib/readline/input.c
- - allow rl_set_keyboard_input_timeout to set the timeout to 0, for
- applications that want to use select() like a poll without any
- waiting
-
-lib/readline/doc/rltech.texi
- - documented valid values for timeout in rl_set_keyboard_input_timeout
-
-jobs.c
- - in stop_pipeline, don't have the parent shell call give_terminal_to
- if subshell_environment contains SUBSHELL_ASYNC (no background
- process should ever give the terminal to anything other than
- shell_pgrp)
- - in make_child, don't give the terminal away if subshell_environment
- contains SUBSHELL_ASYNC
-
- 1/15
- ----
-subst.c
- - in parameter_brace_expand, if extracting ${#varname}, only allow
- `}' to end the expansion, since none of the other expansions are
- valid. Fixes Debian bug reported by Jan Nordhorlz <jckn@gmx.net>
-
- 1/17
- ----
-parse.y
- - in parse_matched_pair, protect all character tests with the MBTEST
- macro
- - in parse_dparen, take out extra make_word after call to alloc_word_desc
- (mem leak)
-
- 1/18
- ----
-parse.y
- - in parse_matched_pair, add P_ALLOWESC to flags passed to recursive
- parse_matched_pair call when encountering a single or double quote
- inside a ``-style command substitution
-
-execute_cmd.c
- - add call to QUIT at beginning of execute_command_internal; better
- responsiveness to SIGINT
-
- 1/21
- ----
-lib/readline/bind.c
- - change rl_invoking_keyseqs_in_map to honor the setting of
- convert-meta when listing key bindings, since if convert-meta is off,
- using '\M-' as the prefix for bindings in, for instance,
- emacs-escape-keymap, is wrong. This affects `bind -p' output
- - change rl_untranslate_keyseq to add '\e' instead of '\C-[' for
- ESC
-
-execute_cmd.c
- - add call to QUIT at end of execute_command
-
- 1/23
- ----
-lib/readline/display.c
- - changed two places in update_line where a check of whether the cursor
- is before the last invisible character in the prompt string to
- differentiate between the multibyte character case (where
- _rl_last_c_pos is a physical cursor position) and the single-byte
- case (where it is a buffer index). This prevents many unnecessary
- \r-redraw the line sequences. Reported by Dan Jacobson.
-
- 1/24
- ----
-quit.h
- - wrap QUIT macro in do...while(0) like other compound statement
- macros
- - CHECK_TERMSIG define (placeholder for now); future use will be to
- handle any received signals that should cause the shell to
- terminate (e.g., SIGHUP)
-
-{input,jobs,nojobs}.c
- - add calls to CHECK_TERMSIG where appropriate (reading input and
- waiting for children)
- - include quit.h if necessary
-
- 1/25
- ----
-parse.y
- - undo change that makes `)' in a compound assignment delimit a token.
- It messes up arithmetic expressions in assignments to `let', among
- other things
-
-sig.h,{jobs,nojobs,sig,trap}.c,builtins/trap.def
- - rename termination_unwind_protect to termsig_sighandler
-
-sig.c
- - split termsig_sighandler into two functions: termsig_sighandler, which
- runs as a signal handler and sets a flag noting that a terminating
- signal was received, and termsig_handler, which runs when it is `safe'
- to handle the signal and exit
- - new terminate_immediately variable, similar to interrupt_immediately
- - termsig_sighandler calls termsig_handler immediately if
- terminate_immediately is non-zero
-
-quit.h
- - change CHECK_TERMSIG macro to check terminating_signal and call
- termsig_handler if it's non-zero
- - add same check of terminating_signal and call to termsig_handler to
- QUIT macro
-
-{jobs,nojobs}.c
- - change call to termsig_sighandler to call termsig_handler directly,
- as was intended
-
-parse.y,builtins/read.def
- - set terminate_immediately to non-zero value when reading interactive
- input, as is done with interrupt_immediately
-
- 1/26
- ----
-doc/{bash.1,bashref.texi}
- - reworded the POSIX standard references to remove mention of POSIX.2
- or 1003.2 -- it's all the 1003.1 standard now. Recommended by
- Arnold Robbins
-
- 1/27
- ----
-lib/readline/complete.c
- - move call to filename dequoting function into
- rl_filename_completion_function; call only if directory completion
- hook isn't set. This means that directory-completion-hook now needs
- to dequote the directory name. We don't want to dequote the directory
- name before calling the directory-completion-hook. Bug reported by
- Andrew Parker <andrewparker@bigfoot.com>
-
-bashline.c
- - add necessary directory name dequoting to bash_directory_expansion
- and bash_directory_completion_hook
-
-lib/readline/doc/rltech.texi
- - add note to description of rl_directory_completion_hook that it
- needs to dequote the directory name even if no other expansions are
- performed
-
- 1/28
- ----
-braces.c
- - make sure that we skip over braces that don't start a valid matched
- brace expansion construct in brace_expand -- there might be a valid
- brace expansion after the unmatched `{' later in the string
- - brace_gobbler now checks that when looking for a `}' to end a brace
- expansion word, there is an unquoted `,' or `..' that's not inside
- another pair of braces. Fixes the a{b{c,d}e}f problem reported by
- Tim Waugh
-
-builtins/declare.def
- - when not in posix mode, and operating on shell functions, typeset
- and declare do not require their variable operands to be valid
- shell identifiers. The other `attribute' builtins work this way.
- Fixes inconsistency reported by Mike Frysinger <vapier@gentoo.org>
-
-{configure,config.h}.in
- - add test for setregid, define HAVE_SETREGID and HAVE_DECL_SETREGID
- as appropriate
- - add test for eaccess, define HAVE_EACCESS if found
-
-lib/sh/eaccess.c
- - new file, with sh_stat and sh_eaccess functions, moved from test.c
- - renamed old sh_eaccess as sh_stataccess, since it uses the stat(2)
- information to determine file accessibility
- - new function, sh_euidaccess, to call when uid != euid or gid != egid;
- temporarily swaps uid/euid and gid/egid around call to access
- - rewrote sh_eaccess to call eaccess, access, sh_euidaccess or
- sh_stataccess as appropriate. access(2) will take into account
- things like ACLs, read-only file systems, file flags, and so on.
-
-lib/sh/Makefile.in,Makefile.in
- - add necessary entries for eaccess.[co]
-
-test.c
- - change calls to test_stat to call sh_stat
-
-{test,general}.c
- - change calls to test_eaccess to call sh_eaccess
-
-externs.h
- - new extern declaration for sh_eaccess
-
-test.[ch]
- - remove test_stat and test_eaccess
-
- 1/29
- ----
-braces.c
- - make change from 1/28 dependant on CSH_BRACE_COMPAT not being
- defined (since old bash behavior is what csh does, defining
- CSH_BRACE_COMPAT will produce old bash behavior)
-
- 1/30
- ----
-bashline.c
- - last argument of bash_default_completion is now a flags word:
- DEFCOMP_CMDPOS (in command position) is only current value
- - attempt_shell_completion now computes flags before calling
- bash_default_completion
- - if no_empty_command_completion is set, bash does not attempt command
- word completion even if not at the beginning of the line, as long
- as the word to be completed is empty and start == end (catches
- beginning of line and all whitespace preceding point)
-
- 2/4
- ---
-lib/readline/display.c
- - change _rl_make_prompt_for_search to use rl_prompt and append the
- search character to it, so the call to expand_prompt in rl_message
- will process the non-printing characters correctly. Bug reported
- by Mike Stroyan <mike.stroyan@hp.com>
-
- 2/5
- ---
-lib/readline/display.c
- - fix off-by-one error when comparing against PROMPT_ENDING_INDEX,
- which caused a prompt with invisible characters to be redrawn one
- extra time in a multibyte locale. Change from <= to < fixes
- multibyte locale, but I added 1 to single-byte definition of
- PROMPT_ENDING_INDEX (worth checking) to compensate. Bug reported
- by Egmont Koblinger <egmont@uhulinux.hu>
-
- 2/8
- ---
-lib/readline/terminal.c
- - call _emx_get_screensize with wr, wc like ioctl code for consistency
- - new function, _win_get_screensize, gets screen dimensions using
- standard Windows API for mingw32 (code from Denis Pilat)
- - call _win_get_screensize from _rl_get_screen_size on mingw32
-
-lib/readline/rlconf.h
- - define SYS_INPUTRC (/etc/inputrc) as system-wide default inputrc
- filename
-
-support/shobj-conf
- - changes to make loadable builtins work on MacOS X 10.[34]
-
-builtins/pushd.def
- - changes to make it work as a loadable builtin compiled with gcc4
-
- 2/9
- ---
-lib/readline/bind.c
- - add SYS_INPUTRC as last-ditch default (if DEFAULT_INPUTRC does not
- exist or can't be read) in rl_read_init_file
-
-lib/readline/doc/rluser.texi
- - add description of /etc/inputrc as ultimate default startup file
-
- 2/10
- ----
-lib/readline/bind.c
- - fix problem with rl_function_of_keyseq that returns a non-keymap
- bound to a portion of the passed key sequence without processing
- the entire thing. We can bind maps with existing non-map
- functions using the ANYOTHERKEY binding code.
-
-variables.c
- - shells running in posix mode do not set $HOME, as POSIX apparently
- requires
-
- 2/15
- ----
-braces.c
- - mkseq() now takes the increment as an argument; changed callers
-
- 2/16
- ----
-builtins/hash.def
- - print `hash table empty' message to stdout instead of stderr
-
- 2/17
- ----
-lib/readline/readline.c
- - when resetting rl_prompt in rl_set_prompt, make sure rl_display_prompt
- is set when the function returns
-
- 2/18
- ----
-lib/readline/display.c
- - further fixes to _rl_make_prompt_for_search from Eric Blake to deal
- with multiple calls to expand_prompt
-
- 2/21
- ----
-builtins/hash.def
- - don't print `hash table empty' message in posix mode
-
- 2/27
- ----
-lib/glob/sm_loop.c
- - change extmatch() to turn off FNM_PERIOD in flags passed to recursive
- calls to gmatch() when calling it with a substring after the start
- of the string it receives. Changed `+', `*', `?, `@', and `!' cases
- to do the right thing. Fixes bug reported by Benoit Vila
- <bvila@free.fr>
-
-braces.c
- - add QUIT; statements to mkseq to make large sequence generation
- interruptible
-
- 2/28
- ----
-lib/glob/glob.c
- - initialize nalloca in glob_vector
-
- 3/1
- ---
-lib/glob/glob.c
- - in glob_vector, when freeing up the linked list after some error,
- make sure to set `tmplink' to 0 if `firstlink' is set to 0, else we
- get multiple-free errors
-
- 3/5
- ---
-trap.c
- - inheritance of the DEBUG, RETURN, and ERR traps is now dependent
- only on the `functrace' and `errtrace' shell options, as the
- documentation says, rather than on whether or not the shell is in
- debugging mode. Reported by Philip Susi <psusi@cfl.rr.com>
-
-parse.y
- - in parse_matched_pair, don't recursively parse ${...} or other
- ${...} constructs inside ``
- - in parse_matched_pair, remove special code that recursively parses
- quoted strings inside `` constructs. For Bourne shell compatibility
-
- 3/6
- ---
-builtins/pushd.def
- - let get_directory_stack take take an `int flags' argument and convert
- $HOME to ~ if flags&1 is non-zero
-
-builtins/common.h
- - change extern declaration for get_directory_stack
-
-variables.c
- - call get_directory_stack with an arg of 0 to inhibit converting
- $HOME to ~ in the result. Fixes cd ${DIRSTACK[1]} problem
- reported by Len Lattanzi <llattanzi@apple.com> (cd fails because
- the tildes won't be expanded after variable expansion)
-
-jobs.c
- - changed hangup_all_jobs slightly so stopped jobs marked J_NOHUP
- won't get a SIGCONT
-
-general.c
- - changed check_binary_file() to check for a NUL byte instead of a
- non-printable character. Might at some point want to check
- entire (possibly multibyte) characters instead of just bytes. Hint
- from ksh via David Korn
-
- 3/7
- ---
-builtins/reserved.def
- - changed runs of spaces to tabs in variables help text to make
- indentation better when displayed
-
-builtins/mkbuiltins.c
- - changes to avoid the annoying extra space that keeps gettext from
- being passed an empty string
-
- 3/9
- ---
-lib/glob/glob.c
- - make sure globbing is interrupted if the shell receives a terminating
- signal
-
- 3/14
- ----
-lib/readline/search.c
- - call rl_message with format argument of "%" in _rl_nsearch_init
- to avoid `%' characters in the prompt string from being interpreted
- as format specifiers to vsnprintf/vsprintf
-
- 3/19
- ----
-parse.y, eval.c, input.h
- - change execute_prompt_command to execute_variable_command; takes the
- variable name as a new second argument
-
- 3/25
- ----
-bashline.c
- - command_word_completion_function keeps track of when it's searching
- $PATH and doesn't return directory names as matches in that case.
- Problem reported by Pascal Terjan <pterjan@mandriva.com>
- - command_word_completion_function returns what it's passed as a
- possible match if it's the name of a directory in the current
- directory (only non-absolute pathnames are so tested).
-
- 3/27
- ----
-subst.c
- - expand_arith_string takes a new argument: quoted. Either 0 (outside
- subst.c) or Q_DOUBLE_QUOTES (substitution functions); changed callers
-
-subst.h
- - changed extern declaration for expand_arith_string
-
-arrayfunc.c
- - changed call to expand_arith_string in array_expand_index
-
- 3/31
- ----
-lib/readline/histfile.c
- - change read_history_range to allow windows-like \r\n line endings
-
-execute_cmd.c
- - add new variable, line_number_for_err_trap, currently set but not
- used
-
- 4/2
- ---
-lib/sh/strtrans.c
- - add code to echo -e and echo with xpg_echo enabled to require
- a leading 0 to specify octal constants
-
- 4/3
- ---
-subst.c
- - slight change to wcsdup() replacement: use memcpy instead of wcscpy
-
-parse.y
- - before turning on W_COMPASSIGN, make sure the final character in the
- token is a `(' (avoids problems with things like a=(4*3)/2)
-
- 4/4
- ---
-lib/sh/snprintf.c
- - in number() and lnumber(), turn off PF_ZEROPAD if explicit precision
- supplied in format
- - change number() and lnumber() to correctly implement zero-padding
- specified by a non-zero `.precision' part of the format
-
-subst.c
- - new flag for extract_delimited_string: EX_COMMAND. For $(...), so
- we can do things like skip over delimiters in comments. Added to
- appropriate callers
- - changes to extract_delimited_string to skip over shell comments when
- extracting a command for $(...) (EX_COMMAND is contained in the
- flags argument)
-
- 4/5
- ---
-subst.c
- - first argument to skip_single_quoted is now a const char *
- - new function, chk_arithsub, checks for valid arithmetic expressions
- by balancing parentheses. Fix based on a patch from Len Lattanzi
-
- 4/6
- ---
-{configure,config.h}.in
- - add separate test for isnan in libc, instead of piggybacking on
- isinf-in-libc test
-
-lib/sh/snprintf.c
- - separate the isnan replacement function so it's guarded by its own
- HAVE_ISNAN_IN_LIBC define
-
-lib/sh/wcsdup.c
- - new file, contains replacement wcsdup library function from subst.c
- with change back to using wcscpy
-
-Makefile.in,lib/sh/Makefile.in
- - make sure wcsdup.c is compiled and linked in
-
-subst.c
- - wcsdup now found in libsh; removed static definition
-
- 4/10
- ----
-lib/readline/callback.c
- - loop over body of rl_callback_read_char as long as there is additional
- input rather than just calling readline_internal_char, which does
- not handle multi-character key sequences or escape-prefixed chars
-
-lib/readline/macro.c
- - make sure we turn off RL_STATE_MACROINPUT when the macro stack is
- empty if we are reading additional input with RL_STATE_MOREINPUT
-
-support/shobj-conf
- - Mac OS X no longer likes the `-bundle' option to gcc when creating a
- dynamic shared library
-
- 4/11
- ----
-lib/tilde/tilde.c
- - don't try to dereference user_entry if HAVE_GETPWENT isn't defined
-
-lib/readline/input.c
- - make sure chars_avail is not used without being assigned a value in
- rl_gather_tyi
- - use _kbhit() to check for available input on Windows consoles, in
- rl_gather_tyi and _rl_input_available
-
- 4/21
- ----
-lib/readline/display.c
- - calculate (in expand_prompt) and keep track of length of local_prompt
- in local_prompt_len; use where appropriate
- - when using o_pos to check whether or not we need to adjust
- _rl_last_c_pos after calling update_line, assume that it's correct
- (a buffer index in non-multibyte locales and a cursor position in
- multibyte locales) and adjust with wrap_offset as appropriate
- - in update_line, set cpos_adjusted to 1 after calling
- _rl_move_cursor_relative to move to the end of the displayed prompt
- string
- - in _rl_move_cursor_relative, check that the multibyte display
- position is after the last invisible character in the prompt string
- before offsetting it by the number of invisible characters in the
- prompt (woff)
-
- 4/26
- ----
-lib/readline/doc/{rluser.texi,readline.3}
- - make sure to note that key bindings don't allow any whitespace
- between the key name or sequence to be bound and the colon
-
- 4/28
- ----
-lib/readline/display.c
- - in update_line, make sure we compare _rl_last_c_pos as strictly less
- than PROMPT_ENDING_INDEX, since it's 0-based, to avoid multiple
- prompt redraws
-
- 5/4
- ---
-parse.y
- - in decode_prompt_string, only prefix the expansion of \[ or \]
- with CTLESC if the corresponding readline escape character is
- CTLESC (coincidentally the same as \[) or CTLNUL. Bug report sent
- by Mike Frysinger <vapier@gentoo.org> prompted the discovery
-
-aclocal.m4
- - slight change to test for /dev/fd to compensate for a linux
- failing; suggested by Mike Frysinger <vapier@gentoo.org>
-
- 5/9
- ---
-arrayfunc.c
- - broke assign_array_var_from_string into two functions:
- expand_compound_array_assignment and assign_compound_array_list;
- assign_array_var_from_string just calls those functions now
-
-arrayfunc.h
- - new extern declarations for expand_compound_array_assignment and
- assign_compound_array_list
-
-subst.c
- - in do_compound_assignment, call expand_compound_array_assignment
- before creating the local variable so a previous inherited
- value can be used when expanding the rhs of the compound assignment
- statement
-
- 5/11
- ----
-doc/{bash.1,bashref.texi}
- - clarifed `trap' description to make it clear that trapped signals
- that are not set to SIG_IGN are reset when a subshell is created
-
- 5/18
- ----
-locale.c
- - change reset_locale_vars to call setlocale (LC_ALL, "") if LANG
- is unset or NULL
- - if LANG is unset or NULL, reset the export environment before
- calling setlocale in reset_locale_vars, and trust that it will
- change the environment setlocale() inspects
-
- 5/21
- ----
-lib/readline/history.c
- - new function, HIST_ENTRY *alloc_history_entry (char *string, char *ts);
- creates a new history entry with text STRING and timestamp TS (both
- of which may be NULL)
- - new function, HIST_ENTRY *copy_history_entry (HIST_ENTRY *hist),
- which copies the line and timestamp entries to new memory but just
- copies the data member, since that's an opaque pointer
- - new function, void replace_history_data (int which, histdata_t *old, histdata_t *new)
- which replaces the `data' member of specified history entries with
- NEW, as long as it is OLD. WHICH says which history entries to
- modify
- - add calls to replace_history_data in rl_free_undo_list and
- rl_do_undo
-
-lib/readline/undo.c
- - new function, alloc_undo_entry (enum undo_code what, int start, int end, char *text)
- takes care of allocating and populating a struct for an individual
- undo list entry
- - new function: _rl_copy_undo_entry(UNDO_LIST *entry)
- - new function: _rl_copy_undo_list(UNDO_LIST *head)
-
-lib/readline/rlprivate.h
- - new extern declarations for _rl_copy_undo_{entry,list}
-
-execute_cmd.c
- - change execute_cond_node so that quoting the rhs of the =~
- operator forces string matching, like the == and != operators
-
- 5/23
- ----
-redir.c
- - add_undo_redirect now takes as an additional argument the type of
- redirection we're trying to undo
- - don't add a "preservation" redirection for fds > SHELL_FD_BASE if
- the redirection is closing the fd
-
- 5/24
- ----
-subst.c
- - make sure that parameter_brace_substring leaves this_command_name
- set to either NULL or its previous value after setting it so that
- arithmetic evaluation errors while expanding substring values
- contain meaningful information
-
- 6/9
- ---
-execute_cmd.c
- - make sure that SUBSHELL_ASYNC and SUBSHELL_PIPE are set as flag bits
- in subshell_environment, rather than setting only a single value
- - change execute_subshell_builtin_or_function to give the `return'
- builtin a place to longjmp to when executed in a subshell or pipeline
- (mostly as the last command in a pipeline). Bug reported by
- Oleg Verych <olecom@gmail.com>
- - in execute_simple_command, make sure to call execute_disk_command
- with the_printed_command_except_trap to keep DEBUG trap command
- strings from overwriting the command strings associated with jobs
- and printed in job control messages. Bug reported by Daniel Kahn
- Gillmor <dkg-debian.org@fifthhorseman.net>
-
-[bash-3.2-alpha frozen]
-
- 6/22
- ----
-syntax.h
- - add new CBLANK (for [:blank:] class) flag value for syntax table and
- shellblank(c) character test macro
-
-mksyntax.c
- - add support for setting CBLANK flag in the syntax table depending on
- whether or not isblank(x) returns true for character x
-
-locale.c
- - change locale_setblanks to set or unset CBLANK flag for each
- character when locale changes
-
-parse.y
- - change call to whitespace(c) in lexical analyzer (read_token()) to
- call shellblank(c) instead, so locale-specific blank characters are
- treated as white space. Fixes bug reported by Serge van deb Boom
- <svdb+bug-bash@stack.nl>
-
-print_cmd.c
- - when printing redirections, add a space between <, >, and <> and the
- following word, to avoid conflicts with process substitution. Bug
- reported by Ittay Dror <ittyad@qlusters.com>
-
- 6/26
- ----
-configure.in
- - set CROSS_COMPILE to the empty string by default, so we don't inherit
- a random value from the environment. Bug reported by
- Lee Revell <rlrevell@joe-job.com>
-
- 6/29
- ----
-lib/glob/xmbsrtowcs.c
- - make sure destp is non-null before assigning a 0 to *destp in
- xdupmbstowcs. Fix from Louiwa Salem <loulwas@us.ibm.com>
-
-execute_cmd.c
- - fix execute_in_subshell to make sure asynchronous isn't set to 0
- before subshell_environment is set appropriately and
- setup_async_signals is run. Based on report by Louiwa Salem
- <loulwas@us.ibm.com>
-
-lib/readline/bind.c
- - in rl_generic_bind(), make sure that the keys array is freed before
- an error return. Fix from Louiwa Salem <loulwas@us.ibm.com>
-
- 7/1
- ---
-builtins/read.def
- - make sure all editing code is protected with #ifdef READLINE, esp.
- unwind-protect that restores the default completion function
-
-lib/readline/display.c
- - make sure to set local_prompt_len in rl_message() [in bash-3.2-alpha]
-
- 7/5
- ---
-builtins/printf.def
- - add more of echo's write error handling to printf. Suggested by
- martin.wilck@fujitsu-siemens.com
-
- 7/7
- ---
-lib/readline/display.c
- - save and restore local_prompt_len in rl_{save,restore}_prompt
- [in bash-3.2-alpha]
-
- 7/8
- ---
-[bash-3.2-alpha released]
-
- 7/9
- ---
-lib/readline/display.c
- - make sure that _rl_move_cursor_relative sets cpos_adjusted when it
- offsets `dpos' by wrap_offset in a multi-byte locale. Bug reported
- by Andreas Schwab and Egmont Koblinger
-
-subst.c
- - make sure that the call to mbstowcs in string_extract_verbatim is
- passed a string with enough space for the closing NUL. Reported
- by Andreas Schwab
-
- 7/18
- ----
-lib/readline/{display,terminal}.c
- - remove #ifdefs for HACK_TERMCAP_MOTION so we can use
- _rl_term_forward_char in the redisplay code unconditionally
-
-lib/readline/rlprivate.h
- - new extern declaration for _rl_term_forward_char
-
-lib/readline/display.c
- - in _rl_move_cursor_relative, use `dpos' instead of `new' when
- deciding whether or not a CR is faster than moving the cursor from
- its current position
- - in _rl_move_cursor_relative, we can use _rl_term_forward_char to
- move the cursor forward in a multibyte locale, if it's available.
- Since that function doesn't have a handle on where the cursor is in
- the display buffer, it has to output a cr and print all the data.
- Fixes rest of problem reported by Egmont Koblinger
- - change variable denoting the position of the cursor in the line buffer
- from c_pos (variable local to rl_redisplay) to cpos_buffer_position
- (variable local to file) for future use by other functions
-
- 7/25
- ----
-lib/malloc/{stats,table}.h
- - include <string.h> for prototypes for memset, strlen
-
-lib/termcap/{termcap,tparam}.c
- - include <string.h> and provide macro replacement for bcopy if
- necessary
-
- 7/27
- ----
-lib/readline/histexpand.c
- - add support for `<<<' here-string redirection operator to
- history_tokenize_word. Bug reported by agriffis@gentoo.org
-
-externs.h
- - don't add prototype for strerror() if HAVE_STRERROR defined
-
- 7/29
- ----
-subst.c
- - in list_string, use `string' instead of `s' -- s is not initialized
-
- 8/9
- ---
-subst.c
- - fix parameter_brace_expand to set W_HASQUOTEDNULL in the WORD_DESC it
- returns if the result of parameter_brace_substring is a quoted null
- ("\177"). Fixes bug reported by Igor Peshansky <pechtcha@cs.nyu.edu>
-
- 8/16
- ----
-lib/readline/readline.h
- - new #define, READERR, intended to be used to denote read/input errors
-
-lib/readline/input.c
- - in rl_getc, if read() returns an error other than EINTR (after the
- EWOULDBLOCK/EAGAIN cases are handled), return READERR rather than
- converting return value to EOF if readline is reading a top-level
- command (RL_STATE_READCMD)
-
-lib/readline/readline.c
- - if rl_read_key returns READERR to readline_internal_char[loop],
- abort as if it had read EOF on an empty line, without any conversion
- to newline, which would cause a partial line to be executed. This
- fixes the bug reported by Mathieu Bonnet <mathieu.bonnet@nalkym.org>
-
-aclocal.m4
- - when testing for validity of /dev/fd/3, use /dev/null instead of
- standard input, since the standard input fails with linux and `su'.
- Bug reported by Greg Shafer <gschafer@zip.com.au>
-
- 8/17
- ----
-Makefile.in
- - switch the TAGS and tags targets so TAGS is the output of `etags' and
- tags is the output of `ctags'. Suggested by Masatake YAMATO
-
- 8/25
- ----
-execute_cmd.c
- - change code to match documentation: set BASH_COMMAND (which takes its
- value from the_printed_command_except_trap) only when not running a
- trap. Rocky says the debugger is ok with this, and this is what his
- original diffs did
-
- 8/29
- ----
-variables.c
- - change set_if_not to create shell_variables if it is NULL, since
- -o invocation options can cause variables to be set before the
- environment is scanned
-
-[bash-3.2-beta frozen]
-
- 9/5
- ---
-[bash-3.2-beta released]
-
- 9/8
- ---
-variables.c
- - change dispose_used_env_vars to call maybe_make_export_env
- immediately if we're disposing a temporary environment, since
- `environ' points to the export environment and getenv() will use
- that on systems that don't allow getenv() to be replaced. This
- could cause the temporary environment to affect the shell. Bug
- reported by Vasco Pedro <vp@di.uevora.pt>
-
-builtins/echo.def,doc/{bash.1,bashref.texi}
- - clarify that `echo -e' and echo when the `xpg_echo' shell option is
- enabled require the \0 to precede any octal constant to be expanded.
- Reported by Vasco Pedro <vp@di.uevora.pt>
-
- 9/12
- ----
-builtins/printf.def
- - make sure `%q' format specifier outputs '' for empty string arguments
- Bug reported by Egmont Koblinger <egmont@uhulinux.hu>
-
-make_cmd.c
- - change make_here_document to echo lines in here-doc if set -v has
- been executed. Reported by Eduardo Ochs <eduardoochs@gmail.com>
-
-aclocal.m4
- - change BASH_CHECK_MULTIBYTE:
- o replace check for wctomb with check for wcrtomb
- o add checks for wcscoll, iswctype, iswupper, iswlower,
- towupper, towlower
- o add call to AC_FUNC_MBRTOWC to check for mbrtowc and mbstate_t
- define HAVE_MBSTATE_T manually
- o add checks for wchar_t, wctype_t, wint_t
-
-config.h.in
- - add defines for wcscoll, iswctype, iswupper, iswlower, towupper,
- towlower functions
- - replace define for wctomb with one for wcrtomb
- - add defines for wchar_t, wint_t, wctype_t types
-
-config-bot.h, lib/readline/rlmbutil.h
- - add check for HAVE_LOCALE_H before defining HANDLE_MULTIBYTE
- - add checks for: ISWCTYPE, ISWLOWER, ISWUPPER, TOWLOWER, TOWUPPER
- - add checks for: WCTYPE_T, WCHAR_T, WCTYPE_T
-
- 9/13
- ----
-lib/readline/display.c
- - when displaying prompts longer than the screenwidth in rl_redisplay,
- and looking for the index of the last character whose buffer index
- is <= the screen width to set up the inv_lbreaks array, make sure to
- catch the case where the index == the screen width (an off-by-one
- error occurs otherwise with prompts one character longer than the
- screen width). Bug reported by Alexey Toptygin <alexeyt@freeshell.org>
-
-configure.in
- - change DEBUGGER_START_FILE to start with ${ac_default_prefix}/share,
- like bashdb installs itself. Reported by Nick Brown
- <nickbroon@blueyonder.co.uk>
-
- 9/14
- ----
-lib/readline/display.c
- - make multibyte code that computes the buffer indices of line breaks
- for a multi-line prompt dependent on MB_CUR_MAX, so we don't take
- the function call hit unless we're in a locale that can have
- multibyte characters
-
- 9/19
- ----
-subst.c
- - make dequote_list extern so other parts of the shell can use it
-
-subst.h
- - extern declaration for dequote_list
-
-builtins/read.def
- - call dequote_list before assigning words read to array variable if
- we saw an escape character. Old code left spurious CTLESCs in the
- string after processing backslashes. Bug reported by Daniel Dawson
- <ddawson@icehouse.net>
-
- 9/21
- ----
-[bash-3.2 frozen]
-
- 10/9
- ----
-support/shobj-coonf
- - change -fpic to -fPIC for FreeBSD systems (needed for SPARC at least)
-
- 10/11
- -----
-[bash-3.2 released]
-
- 10/12
- -----
-parse.y
- - change parse_matched_pair to make sure `` command substitution does
- not check for shell comments while parsing. Bug reported against
- bash-3.2 by Greg Schaefer <gschafer@zip.com.au>
-
- 10/14
- -----
-parse.y
- - add new parser_state flag: PST_REGEXP; means we are parsing a
- regular expression following the =~ conditional operator
- - cond_node sets PST_REGEXP after reading the `=~' operator
- - change read_token to call read_token_word immediately if the
- PST_REGEXP bit is set in parser_state
- - change read_token_word to skip over `(' and `|' if PST_REGEXP is
- set, since those characters are legitimate regexp chars (but still
- parse matched pairs of parens)
-
- 10/16
- -----
-builtins/ulimit.def
- - add -e and -r to $SHORT_DOC usage string
-
-po/ru.po
- - fix encoding; Russian text in the file is actually encoded in KOI8-R
-
- 10/23
- -----
-shell.c
- - make sure that the call to move_to_high_fd in open_shell_script
- passes 1 for the `check_new' parameter so open high file descriptors
- don't get closed and reused. Bug reported by Mike Stroyan
- <mike.stroyan@hp.com>
-
-doc/bashref.texi
- - fixes for typos and misspellings sent in by Brian Gough
-
- 10/24
- -----
-support/shobj-conf
- - make netbsd shared library creation like openbsd's until I hear
- differently (called using `gcc -shared')
-
- 10/26
- -----
-subst.c
- - fix bug in parameter_brace_patsub so if the first character of the
- expanded pattern is a `/', it is not taken as a global replacement
- specifier. Bug reported on forums.nekochan.net
-
- 10/27
- -----
-builtins/printf.def
- - if we need an extern declaration for asprintf, make sure we include
- stdarg.h or varargs.h, whichever is appropriate
- - if we do not have asprintf, add an extern declaration using
- stdarg format. This fixes the bugs with %G on IRIX reported by
- Matthew Woehlke <mwoehlke@tibco.com> and Stuart Shelton
- <srcshelton@gmail.com>
-
-
-lib/sh/snprintf.c
- - add note to not call log_10 with 0 argument -- we don't want to do
- what real log10 does (-infinity/raise divide-by-zero exception)
- - make sure numtoa (used by dtoa) takes the precision into account
- when computing the fractional part with an argument of `0.0'
- - make sure `g' and `G' formats don't print radix char if there are
- no characters to be printed after it (change to floating())
- - change callers of log_10 (exponent, 'g' and 'G' cases in
- vsnprintf_internal) to not call it with 0 for argument. This fixes
- the hang reported on IRIX by Matthew Woehlke <mwoehlke@tibco.com>
- and Stuart Shelton <mwoehlke@tibco.com>
-
- 10/28
- -----
-builtins/{caller,pushd}.def
- - changed longdoc strings in loadable builtin section to be single
- strings, as put in the build directory builtins.c file, to aid
- translators
-
- 11/1
- ----
-execute_cmd.c
- - reset subshell_environment to 0 after make_child() call in
- execute_null_command. Fix provided by Roy Marples
- <uberlord@gentoo.org>
-
- 11/7
- ----
-lib/tilde/tilde.c
-lib/readline/{util,undo,callback,input,isearch,kill}.c
- - make sure that memory allocated with xmalloc is freed with xfree
-
- 11/9
- ----
-lib/readline/display.c
- - make sure that _rl_redisplay_after_sigwinch clears the last displayed
- line instead of the current line (instead of assuming that the
- cursor is on the last line). Fixes bug reported by Egmont
- Koblinger <egmont@uhulinux.hu>
-
- 11/10
- -----
-lib/readline/display.c
- - make sure that _rl_col_width is never called with MB_CUR_MAX == 1,
- since it doesn't count invisible characters and they are not
- compensated for. Added a warning in _rl_col_width if called when
- MB_CUR_MAX == 1. Bug reported and solution suggested by Eric
- Blake <ebb9@byu.net>
-
- 11/11
- -----
-lib/readline/display.c
- - make sure _rl_wrapped_line is initialized to inv_lbsize int chars.
- inv_lbsize and vis_lbsize are the same at that point, but it makes
- the intent clearer. Fix from jan.kratochvil@redhat.com.
- - in rl_redisplay, make sure we call memset on _rl_wrapped_line with
- its full initialized size: inv_lbsize*sizeof(int). Fix from
- jan.kratochvil@redhat.com.
- - wrap the invisible and visible line variables and _rl_wrapped_line
- into line_state structures, which can be swapped more efficiently.
- Have to watch the wrapped_line field, since there's now one for
- each struct. Changes from jan.kratochvil@redhat.com.
-
-lib/readline/complete.c
- - in stat_char, check for `//server' on cygwin and return `/', since
- it will always behave as a directory. Fix from Eric Blake
-
-lib/readline/histfile.c
- - Cygwin's mmap() works in recent versions, so don't #undef HAVE_MMAP.
- Recommendation from Eric Blake
-
-lib/readline/rlwinsize.h
- - make sure tcflow() is defined on SCO Unix. Fix from William Bader
-
-aclocal.m4
- - add check for localeconv to AM_INTL_SUBDIR macro
-
-config.h.in
- - add HAVE_LOCALECONV
-
-lib/sh/snprintf.c
- - add check for HAVE_LOCALECONV for GETLOCALEDATA macro
-
-general.[ch]
- - first argument to legal_number is now `const char *'
-
- 11/14
- -----
-lib/readline/{readline,rlprivate}.h
- - move rl_display_prompt declaration from rlprivate.h to readline.h
-
-lib/readline/util.h
- - new function: rl_free(void *mem), for use by users of readline dlls
- on Windows
-
-lib/readline/readline.h
- - new extern declaration for rl_free
-
-lib/readline/doc/rltech.texi
- - document rl_free and rl_display_prompt for use by application writers
-
- 11/15
- -----
-aclocal.m4
- - change tests for /dev/fd and /dev/stdin to use constructs of the form
- (exec test ... ) instead of test ... to avoid bash's /dev/fd and
- /dev/stdin emulation
-
- 11/16
- -----
-jobs.c
- - in delete_job, reset_current was being called before the job slot
- was cleared -- moved after job_slots[job] was set to NULL. Fixes
- bug reported by Dan Jacobson <jidanni@jidanni.org>
-
- 11/19
- -----
-findcmd.c
- - when the checkhash option is set, fix the check for the hashed
- pathname being an existing executable file. Old code required a
- hash table deletion and re-addition. Bug reported by Linda
- Walsh <bash@tlinx.org>
-
- 11/21
- -----
-subst.c
- - in pos_params, handle case of `start' == 0 by making the list of
- positional parameters begin with $0
- - in parameter_brace_substring, increment `len' if start == 0, sicne
- we will be adding $0 to the beginning of the list when we process it
-
-doc/{bash.1,bashref.texi}
- - document new behavior of `0' offset when using substring expansion
- with the positional parameters
-
-support/shobj-conf
- - changes to shared object creation for loadable builtins on Mac OS X
- 10.4 to use libtool instead of ld by specifying -dynamiclib
- argument and changing options to be appropriate for libtool. This
- winds up creating a dynamic shared library instead of an executable
-
- 11/24
- -----
-{jobs,nojobs}.c
- - don't set last_asynchronous_pid to the child's pid in the child
- for asynchronous jobs (for compatibility -- all other posix shells
- seem to do it this way). This means that (echo $! )& echo $! should
- display two different pids. Fix from discussion on the
- austin-group-l list
-
-builtins/mkbuiltins.c
- - change builtins.c file generation so short doc strings are marked for
- gettext and available for subsequent translation. Suggestion by
- Benno Schulenberg <bensberg@justemail.net>
-
-builtins/{bind,cd,hash,inlib,printf,pushd,test,times,ulimit}.def
-lib/malloc/malloc.c
-{shell,subst}.c
- - fix a few strings that were not marked as translatable. Fix from
- Benno Schulenberg <bensberg@justemail.net>
-
-lib/readline/misc.c
- - new function, _rl_revert_all_lines(void). Goes through history,
- reverting all entries to their initial state by undoing any undo
- lists.
-
-lib/readline/rlprivate.h
- - extern declaration for _rl_revert_all_lines
-
-rldefs.h
- - add #undef HAVE_STRCOLL if STRCOLL_BROKEN is defined, prep to move
- from config.h.in. Problem reported by Valerly Ushakov
- <uwe@ptc.spbu.ru>
-
- 11/25
- -----
-lib/readline/readline.c
- - call _rl_revert_all_lines from readline_internal_teardown if the
- variable _rl_revert_all_at_newline is non-zero
- - declare _rl_revert_all_lines initially 0
-
- 11/27
- -----
-doc/{bash.1,bashref.texi}
- - make sure to be explicit that `typeset +r' cannot remove the readonly
- attribute from a variable
-
- 11/28
- -----
-lib/sh/zmapfd.c
- - new file, implements zmapfd(), which takes a file and returns its
- contents in a string
-
-externs.h
- - extern declaration for zmapfd
-
- 11/29
- -----
-builtins/evalfile.c
- - in _evalfile, use zmapfd to read the contents of the file into a
- string, rather than using the size reported by stat and reading that
- many characters, if the file is not a regular file (for things like
- named pipes, stat reports the size as 0)
-
- 12/3
- ----
-lib/sh/snprintf.c
- - make sure number() sets the FL_UNSIGNED flag for %x and %X, so
- fmtulong treats them as unsigned numbers. Fixes bug reported by
- James Botte <James.M.Botte@lowes.com>
-
- 12/13
- -----
-lib/readline/util.c
- - new function, _rl_ttymsg, for internal warning messages -- does
- redisplay after printing message
- - new function, _rl_errmsg, for internal warning/error messages --
- does not do redisplay after printing message
-
-lib/readline/rlprivate.h
- - new extern declaration for _rl_ttymsg, _rl_errmsg
-
-lib/readline/{bind,callback,complete,display,rltty}.c
- - use _rl_ttymsg/_rl_errmsg instead of direct writes to stderr
-
-lib/sh/tmpfile.c
- - in get_tmpdir(), make sure that $TMPDIR names a writable directory;
- otherwise skip it. This catches names longer than PATH_MAX, but in
- case it doesn't test that the length does not exceed PATH_MAX. Fixes
- heap overrun bug reported by Eric Blake <ebb9@byu.net>
-
- 12/16
- -----
-builtin/{set,declare,shopt,trap,wait,bind,complete,enable,fc,history,read,setattr}.def
-doc/{bash.1,bashref.texi}
- - improvements and clarifications to the help text associated with
- several builtins, in some cases bringing them into line with the
- man page text. From Benno Schulenberg <bensberg@justemail.net>
-
-doc/{bash.1,bashref.texi}
- - add `E' and `T' to the synopsis of the set builtin.
- From Benno Schulenberg <bensberg@justemail.net>
-
-builtins/{break,exit,fg_bg,hash,jobs,type,ulimit}.def
-builtins/{common,evalfile}.c
-{error,expr,jobs,mksyntax,nojobs,shell,subst,version,siglist}.c
- - add gettextizing marks to untranslated strings
- From Benno Schulenberg <bensberg@justemail.net>
-
- 12/19
- -----
-builtins/common.c
- - change display_signal_list (used by `trap -l' and `kill -l') to use
- five columns instead of 4 to display signal names
-
-builtins/help.def
- - use the true terminal width instead of assuming 80 when displaying
- help topics, leaving two characters of whitespace between horizontal
- descriptions instead of 1
- - change to print in columns with entries sorted down rather than across
- (that is, like `ls' rather than `ls -x'). Change inspired by Benno
- Schulenberg <bensberg@justemail.net>
-
-jobs.h
- - give values to the JOB_STATE enumerations so they can be used as
- bitmasks, too
-
- 12/22
- -----
-doc/{bash.1,bashref.texi}
- - change description of `set' to make it clearer that you can use
- `+' to turn off options
- - clarify in the description of word splitting that sequences of
- IFS whitespace at the beginning or end of the string are ignored
-
- 12/26
- -----
-doc/bashref.texi
- - move `shopt' builtin to its own section; change internal references
- from `Bash Builtins' to the new shopt builtin
- - new section for builtins that modify shell behavior in `Shell
- Builtin Commands'; move set and shopt to new section. Changes
- inspired by Benno Schulenberg <bensberg@justemail.net>
-
-{redir,subst}.c
- - add MT_USETMPDIR flag to calls to sh_mktmpfd and sh_mktmpname. Bug
- reported by Eric Blake <ebb9@byu.net>
-
-{configure,Makefile}.in
- - changes so that the pathname for DEBUGGER_START_FILE is substituted
- into pathnames.h at make time (allowing more flexibility in setting
- `prefix' or `datadir') instead of at configure time. Suggested by
- Nick Brown <nickbroon@blueyonder.co.uk>
-
-shell.c
- - declaration for have_devfd; initialized from HAVE_DEV_FD
- - declaration for check_jobs_at_exit; initialized to 0
- - declaration for autocd; initialized to 0
-
-variables.c
- - new dynamic variable, BASHPID, always set from return value from
- getpid() (changes even when $$ doesn't change). Idea from Bruce
- Korb <bruce.corb@3pardata.com>
-
-builtins/exit.def
- - if check_jobs_at_exit is non-zero, list jobs if there are any stopped
- or running background jobs; don't exit shell if any running jobs
-
-execute_cmd.c
- - in execute_simple_command, if the first word of a simple command is
- a directory name (after looking for builtins, so `.' isn't caught)
- that isn't found in $PATH, and `autocd' is non-zero, prefix a "cd"
- to the command words
-
-builtins/shopt.def
- - new `checkjobs' option, changes value of check_jobs_at_exit
- - new `autocd' option, changes value of autocd
-
-pcomplete.c
- - add COMP_TYPE, set to rl_completion_type, to list of variables set
- by bind_compfunc_variables and unset by unbind_compfunc_variables
-
-doc/{bash.1,bashref.texi}
- - document BASHPID
- - document new shopt `checkjobs' option
- - document new shopt `autocd' option
- - document COMP_TYPE completion variable
-
- 12/29
- -----
-aclocal.m4
- - in BASH_SYS_SIGLIST, check HAVE_DECL_SYS_SIGLIST instead of the
- obsolete and no-longer-supported SYS_SIGLIST_DECLARED
-
- 12/30
- -----
-lib/readline/vi_mode.c
- - add ` (backquote) to the list of vi motion characters
- - in rl_vi_delete_to, rl_vi_change_to, and rl_vi_yank_to, don't delete
- character under the cursor if the motion command moves the cursor
- backward, so add F and T to the commands that don't cause the
- mark to be adjusted
- - add ` to the characters that don't cause the mark to be adjusted
- when used as a motion command, since it's defined to behave that way
- - when a motion character that may adjust the mark moves point
- backward, don't adjust the mark so the character under the cursor
- isn't deleted
-
-lib/readline/complete.c
- - add variable rl_sort_completion_matches; allows application to
- inhibit match list sorting
- - add variable rl_completion_invoking_key; allows applications to
- discover the key that invoked rl_complete or rl_menu_complete
-
-lib/readline/readline.h
- - extern declarations for rl_completion_invoking_key and
- rl_sort_completion_matches
-
-lib/readline/doc/rltech.texi
- - documented rl_completion_invoking_key and rl_sort_completion_matches
-
-pcomplete.c
- - export variable COMP_KEY to completion functions; initialized from
- rl_completion_invoking_key; unset along with rest of completion
- variables
-
-doc/{bash.1,bashref.texi},lib/readline/doc/rluser.texi
- - document COMP_KEY
-
-[many files]
- - changes to make variables and function parameters `const' for better
- text sharing. Changes originally from Andreas Mohr
- <andi@rhlx01.fht-esslingen.de>
-
- 1/4/2007
- --------
-lib/intl/Makefile.in
- - use cmp before copying libgnuintl.h to libintl.h -- maybe save a few
- rebuilds
-
-lib/builtins/Makefile
- - fixes to build LIBINTL_H if necessary, dependency on this for
- mkbuiltins.o prevented `make -j 6' from working correctly
-
- 1/8
- ---
-subst.c
- - new function, fifos_pending(), returns the count of FIFOs in
- fifo_list (process substitution)
-
-subst.h
- - extern declaration for fifos_pending()
-
-execute_cmd.c
- - in execute_simple_command, if CMD_NO_FORK is set before we call
- execute_disk_command, make sure there are no FIFOs in the expanded
- words (from process substitution) and turn off CMD_NO_FORK if there
- are, so they can get unlinked when the command finishes
-
- 1/10
- ----
-subst.c
- - read_comsub now takes a flags parameter and returns appropriate W_*
- flags in it
- - command_substitute now returns a WORD_DESC *, with the string it used
- to return as the `word' and `flags' filled in appropriately
-
-subst.h
- - changed extern declaration for command_substitute
-
-{pcomplete,subst}.c
- - changed callers of command_substitute appropriately
-
-subst.c
- - string_extract_verbatim now takes an additional int flags argument;
- changed callers
-
- 1/11
- ----
-support/texi2html
- - fix problem that caused index links to not be generated if the first
- index node had a name different than the node name
-
-doc/bashref.texi
- - encapsulated all indexes into a single `Indexes' appendix; works
- around bug fixed in texi2html
-
- 1/12
- ----
-subst.c
- - add call to sv_histtimefmt in initialize_variables so HISTTIMEFORMAT
- from the environment is honored. Fix from Ark Submedes (heh)
- <archimerged@gmail.com>
-
-lib/readline/histfile.c
- - make sure that the first character following the history comment
- character at the beginning of a line is a digit before interpreting
- it as a timestamp for the previous line
-
-doc/{bash.1,bashref.texi},lib/readline/doc/hsuser.texi
- - added detail to make it clear exactly how history timestamps are
- saved to and read from the history file
-
-subst.c
- - change quote_escapes to add CTLESC before spaces if IFS is null,
- just in case we have to split on literal spaces later on (e.g., in
- case of unquoted $@). Corresponding changes to dequote_escapes.
- Fixes a couple of problems reported by Brett Stahlman
- <brettstahlman@comcast.net>
-
- 1/14
- ----
-subst.c
- - make same change to read_comsub to add CTLESC before ' ' if $IFS is
- null, since we will split on literal spaces later
-
- 1/15
- ----
-array.c
- - new function, array_quote_escapes (ARRAY *a), calls quote_escapes
- on each element of the array in the same way array_quote calls
- quote_string
- - call array_quote_escapes if match is not quoted in array_patsub
- - array_slice is now used, so remove the #ifdef INCLUDE_UNUSED define
- - change structure of array_subrange to call array_slice to create a
- new array with the desired subset of elements, then call array_quote
- or array_quote_escapes as necessary, like array_patsub. Convert to
- a string by calling array_to_string on the sliced-out array
-
-array.h
- - new extern declaration for array_quote_escapes
-
-subst.c
- - since array_patsub now calls quote_escapes as necessary, callers
- don't need to call it after array_patsub returns. Fixes first bug
- reported by Brett Stahlman <brettstahlman@comcast.net>
- - since array_subrange now calls quote_escapes as necessary, callers
- don't need to call it after array_patsub returns. Same fix as
- for array_patsub
-
- 1/31
- ----
-configure.in
- - add -DSOLARIS to LOCAL_CFLAGS for solaris x
-
-config-bot.h
- - don't #undef HAVE_GETCWD if GETCWD_BROKEN and SOLARIS are both
- defined. Solaris's loopback mount implementation breaks some of the
- file system assumptions the replacement getcwd uses.
-
-builtins/common.c
- - if GETCWD_BROKEN is defined, call getcwd with PATH_MAX for the size
- argument, so it will allocate a buffer for the current working dir
- with that size, instead of one that's `big enough'
-
-config.h.in
- - add #undef PRI_MACROS_BROKEN for AIX 4.3.3
-
-pathexp.h
- - new flag value for quote_string_for_globbing: QGLOB_REGEXP (quoting
- an ERE for matching as a string)
-
-pathexp.c
- - change quote_string_for_globbing to understand QGLOB_REGEXP
-
-execute_cmd.c
- - change execute_cond_node to pass 2 (regexp match), 1 (shell pattern
- match), or 0 (no matching) to cond_expand_word
-
-subst.c
- - change cond_expand_word to translate SPECIAL==2 into passing
- QGLOB_REGEXP to quote_string_for_globbing
-
-locale.c
- - by default, if all else fails, set shell's idea of locale to ""
- instead of its idea of `default_locale' -- the library functions
- behave better with that value
-
- 2/2
- ---
-builtins/printf.def
- - if PRI_MACROS_BROKEN is defined, #undef PRIdMAX (AIX 4.3.3 broken)
-
- 2/3
- ---
-Makefile.in,{builtins,doc}/Makefile.in,lib/*/Makefile.in
- - add assignment for datarootdir as per GNU coding standards
-
-Makefile.in,builtins/Makefile.in,lib/intl/Makefile.in,po/Makefile.in.in
- - use @localedir@ instead of $(datadir)/locale in assignment
-
- 2/13
- ----
-jobs.c
- - fix compact_jobs_list to not return js.j_lastj, since that is in use
- and should not be overwritten. Fix from Len Lattanzi
- <llattanzi@apple.com>
-
- 2/16
- ----
-lib/readline/text.c
- - change rl_forward_char to allow moving to the end of the line when
- using the arrow keys in vi insertion mode, rather than having the
- behavior identical between vi command and insertion modes. Change
- suggested by Hugh Sasse <hgs@dmu.ac.uk>
-
- 2/19
- ----
-CWRU/audit-patch
- - patch from Steve Grubb of RedHat <sgrubb@redhat.com> to make bash
- audit root's behavior by logging commands using his audit
- framework. Enabled if the shell's name is `aubash'.
-
- 3/8
- ---
-jobs.c
- - use WSTATUS (p->status) instead of bare p->status. Fix from
- Jim Brown <jim.brown@rsmas.miami.edu>
-
- 3/9
- ---
-lib/readline/{complete,input,isearch,misc,readline,text,vi_mode}.c
- - make sure cases where rl_read_key returns -1 (usually due to EIO
- because the controlling tty has gone away) are handled correctly.
- Prompted by report from Thomas Loeber <ifp@loeber1.de>
-
- 3/10
- ----
-sig.c
- - new function, top_level_cleanup, callable from contexts where some
- cleanup needs to be performed before a non-fatal call to
- jump_to_top_level
-
-sig.h
- - new extern declaration for top_level_cleanup
-
-builtins/common.c
- - add calls to top_level_cleanup before calls to jump_to_top_level
- in a builtin command context (no_args(), get_numeric_arg()). Fixes
- bug reported by Ian Watson
-
-lib/readline/display.c
- - in _rl_move_cursor_relative, use `new' when comparing against
- the last invisible character in the prompt, since they both denote
- buffer indices when in a multibyte locale, whereas `dpos' is a
- display position
-
- 3/13
- ----
-lib/readline/complete.c
- - set rl_completion_append_character to the default (' ') in
- set_completion_defaults(). Fixes bug reported by David Emerson
- <demerson3x@angelbase.com>
-
- 3/23
- ----
-builtins/evalfile.c
- - make sure read() returns a value >= 0 before using it as an index
- into string[]
- - use a variable of type `ssize_t' for return value from read()
- - only try to read the entire contents of a regular file in one shot
- if the file size is less than SSIZE_MAX. These fix problems
- reported by hooanon05@yahoo.co.jp.
-
-include/typemax.h
- - define SSIZE_MAX as 32767 if it's not defined
-
-lib/readline/display.c
- - in rl_redisplay() and update_line(), if redrawing the prompt because
- it contains invisible characters, make sure we redraw the character
- indicating a modified history line and take it into account when
- computing _rl_last_c_pos
- - in update_line, if deleting characters and redrawing the new text,
- make sure we adjust _rl_last_c_pos by wrap_offset in a multibyte
- locale if the text we're drawing starts before or at the last
- invisible character in the prompt string. Fixes bug reported on
- bug-readline by J Pelkey <pelkeyj@gmail.com>
-
-parse.y
- - when adding at CTLESC character to the current token, do not
- escape it with CTLESC if pass_next_character indicates that the
- CTLESC was escaped by a backslash. Fixes bug reported by
- Paul Bagshaw <paul.bagshaw@orange-ftgroup.com>.
-
- 3/25
- ----
-lib/readline/text.c
- - in rl_forward_char, short-circuit the loop if in emacs mode and
- rl_point == rl_end. Fixes problem with multibyte locales
- reported by Len Lattanzi <llattanzi@apple.com>
-
- 3/29
- ----
-command.h
- - new flag for subshell_environment: SUBSHELL_PROCSUB, for process
- substitution
-
-subst.c
- - add SUBSHELL_PROCSUB to subshell_environment in process_substitute
-
- 3/30
- ----
-doc/Makefile.in
- - fix installation of bash.info to understand that it is in the build
- directory, not the source directory
-
-mailcheck.c
- - new function, init_mail_dates, calls remember_mail_dates only if
- there are no mailboxes in `mailfiles'
- - new function, init_mail_file, initializes a FILEINFO, using the
- last time mail was checked as the mtime and atime (or the time the
- shell was started if last_time_mail_checked is uninitialized)
- - call init_mail_file instead of update_mail_file in add_mail_file,
- called from remember_mail_dates (which is supposed to initialize
- the list of mail files)
- - new convenience functions, alloc_mail_file and dispose_mail_file to
- allocate and free FILEINFO structs
-
-mailcheck.h
- - extern declaration for init_mail_dates
-
-shell.c
- - call init_mail_dates instead of remember_mail_dates
-
- 4/4
- ---
-builtins/read.def
- - changes to print $PS2 when a line is continued with a backslash in
- an interactive shell. This is as POSIX requires
-
- 4/5
- ---
-subst.c
- - make sure quote_escapes is only ever called when the word to be
- escaped is not marked as double-quoted -- cleaner, and allows us
- to make certain assumptions
-
- 4/6
- ---
-subst.c
- - change all EX_* defines to begin with SX_
- - new flag, SX_NOCTLESC, obeyed by string_extract_verbatim, tells it
- to not obey CTLESC quoting
- - change quote_escapes to not quote CTLESC with CTLESC if one of the
- chars in $IFS is CTLESC, since the return value from quote_string
- will be passed to word splitting and filename generation
- - change read_comsub to do the same thing for unquoted command
- substitutions
- - change list_string to pass SX_NOCTLESC if CTLESC is one of the
- chars in $IFS, so it will split on CTLESC instead of using it as a
- quote character
-
- 4/7
- ---
-subst.c
- - slight change to string_extract_verbatim to allow CTLESC to quote
- CTLNUL even if SX_NOCTLESC is set in the flags passed, to protect
- the CTLNULs from future calls to remove_quoted_nulls. Only
- matters when $IFS contains CTLESC
- - changes to cope with $IFS containing CTLNUL in the same way as the
- CTLESC changes
-
-builtins/read.def
- - changes to cope with $IFS containing CTLNUL in the same way as the
- CTLESC changes
-
- 4/16
- ----
-lib/sh/strftime.c
- - a couple of fixes to the `%z' code
-
-eval.c
- - add an fflush after printing the auto-logout message
-
- 4/24
- ----
-subst.c
- - add call to top_level_cleanup in exp_jump_to_top_level to get things
- like unwind-protects and the loop levels cleaned up
-
-{arrayfunc,expr,variables}.c
- - add calls to top_level_cleanup before jump_to_top_level()
-
- 4/27
- ----
-builtins/complete.def
- - make sure the `command' argument to the -C option is printed with
- single quotes, since multi-word commands will require them. Bug
- reported by martin@snowplow.org
-
-execute_cmd.c
- - change execute_builtin_or_function and execute_subshell_builtin_or_function
- to call fflush(stdout) after the builtin or function returns, to
- make sure that all output is flushed before the call returns. It
- matters on cygwin. Fix suggested by Eric Blake <ebb9@byu.net>
-
-redir.c
- - in do_redirection_internal, if the file descriptor being acted upon
- is the same one used by the stdout stream, call fflush(stdout) to
- make sure all output is flushed before changing the underlying fd
- out from underneath stdio. Fix suggested by Eric Blake <ebb9@byu.net>
-
-
- 4/30
- ----
-
-builtins/common.c
- - new function, sh_chkwrite(int), fflushes stdout and checks for error;
- printing an error message and returning a new exit status if there's
- an error on stdout. Takes exit status as argument; returns new exit
- status (EXECUTION_FAILURE if write error)
-
-builtins/common.h
- - new extern declaration for sh_chkwrite
-
-builtins/{alias,cd,complete,echo,fc,history,pushd,shopt,times,trap,type,ulimit,umask}.def
- - change to use sh_chkwrite to report write errors
-
-builtins/fc.def
- - if an error occurs while writing commands from the history to a file
- to be executed, report a write error and return failure without
- attempting to execute any commands
-
- 5/1
- ---
-builtins/{bind,declare,set,setattr}.def
- - change to use sh_chkwrite to report write errors
-
- 5/2
- ---
-lib/readline/input.c
- - fix off-by-one errors in _rl_get_char (pop_index) and rl_stuff_char
- (push_index) that caused the 511th character in the buffer to be
- discarded. Fixes bug reported by Tom Bjorkholm <tom.bjorkholm@ericsson.com>
-
- 5/8
- ---
-subst.c
- - fix parameter_brace_remove_pattern to pass getpattern() newly-allocated
- memory. If word expansions (particularly brace expansions) are
- required, the expansion code will free the string passed to
- expand_word_internal, and we don't want to free unallocated memory
- (patstr++) or have duplicate frees (patstr). Fixes bug reported on
- Red Hat bugzilla
-
- 5/9
- ---
-lib/readline/signals.c
- - fix bug in rl_set_signals that caught SIGINT twice and didn't catch
- SIGTERM. Bug reported by Ed Kwan <ed.kwan@onstor.com>
-
- 5/18
- ----
-jobs.c
- - change compact_jobs_list to return 1 if js.j_lastj == 0 and there is
- a job in jobs[0]; compact_jobs_list should never return an index
- already occupied
- - change reset_job_indices to avoid infinite looping when js.j_firstj
- == 0 or js.j_firstj == js.j_jobslots upon function entry. Fixes
- bug reported by osicka@post.cz
-
- 5/20
- ----
-
-execute_cmd.c
- - new variable, executing_builtin, keeps track of number of "levels"
- of builtins being executed; incremented by execute_builtin; saved
- and restored by execute_simple_command
-
-subst.c
- - new variable, assigning_in_environment, set and unset around calls
- to assign_in_env by the expansion code
-
-variables.c
- - use executing_builtin and assigning_in_environment to decide whether
- or not to look into temporary_env when calling find_variable_internal.
- Fixes problem reported by Kevin Quinn <kevquinn@gentoo.org>
-
- 5/22
- ----
-redir.c
- - change add_undo_redirect to differentiate between file descriptors
- greater than SHELL_FD_BASE (currently 10) used internally to save
- others and then being the targets of user redirection and fds that
- are just the target of user redirections. The former need to have
- an `exec undo' redirect added to undo it in case exec throws away
- redirections; the latter does not. We use the close-on-exec flag
- for this: if it's set, we assume that the file descriptor is being
- used internally to save another. Fixes problem reported by Ian
- Jackson <ian@davenant.greenend.org.uk>
-
-shell.c
- - new function, init_interactive_script(), does interactive initialization
- for a script run with `bash -i script' -- does everything the same
- as init_interactive except set `interactive == 1', which causes the
- shell to read from the standard input, after calling
- init_noninteractive
- - call init_interactive_script if a script is run as `bash -i script'.
- Fixes problem reported by Joseph Michaud <jmichaud@sgi.com>
-
- 5/24
- ----
-builtins/printf.def
- - change vbadd to only call FASTCOPY if the passed buffer length is
- > 1
- - if the `-v' option is supplied and `vbuf' is already non-null from a
- previous `printf -v var' call, set vbuf[0]=0 explicitly instead of
- relying on vbadd to do it -- vbadd may not be called.
- - fix PRETURN macro to set vbuf[0] == 0 if vbuf is not freed. These
- should fix problem reported by Elmar Stellnberger <estellnb@yahoo.de>
-
-lib/readline/display.c
- - fix update_line to deal with the case where col_lendiff > 0 (meaning
- the new string takes up more screen real estate than the old) but
- lendiff < 0 (meaning that it takes fewer bytes to do so). This can
- happen when a multibyte prompt string is replaced with a longer one
- containing only single-byte characters (e.g., when doing a reverse
- i-search). Fixes gentoo bug reported by Peter Volkov
- <torre_cremata@mail.ru>
-
-builtins/read.def
- - make sure we only print $PS2 if the standard input is a terminal
- - new function, read_mbchar, to read a multibyte character so we
- can make sure we read entire multibyte chars when `read -n' is
- used, rather than bytes. Only called when -n is supplied.
- Fixes problem reported by Stanislav Brabec <sbrabec@suse.cz>
-
- 5/25
- ----
-externs.h
- - new #defines for third argument to named_function_string:
- FUNC_MULTILINE (don't suppress newlines) and FUNC_EXTERNAL (convert
- to external display form)
-
-subst.h
- - new extern declaration for remove_quoted_escapes
-
-subst.c
- - remove_quoted_escapes is now global
-
-print_cmd.c
- - in named_function_string, if FUNC_EXTERNAL is in the flags argument,
- call remove_quoted_escapes to convert from internal to external form.
- Fixes bug reported by Bo Andresen <bo.andresen@zlin.dk>
-
-variables.c,builtins/{declare,setattr,type}.def
- - use FUNC_MULTILINE in calls to named_function_string as appropriate
- - add FUNC_EXTERNAL to calls to named_function_string as appropriate
-
- 5/27
- ----
-{make_cmd,variables}.c
- - changes to enable the shell to compile when debugger support is
- configured out (function_def hash table and access functions). Fixes
- bug reported by Horst Wente <horst.wente@acm.org>
-
-builtins/help.def
- - fix bug in `help' two-column printing to avoid referencing
- shell_builtins[num_shell_builtins]
-
-error.c
- - in get_name_for_error, use dollar_vars[0] if the name returned from
- looking in $BASH_SOURCE[0] is the empty string as well as if it's
- null
-
- 5/31
- ----
-arrayfunc.c
- - change array_value_internal to set *RTYPE to 1 if the reference is
- array[*] and 2 if the reference is array[@]
-
-subst.c
- - in parameter_brace_expand_word, set the flags returned by the word
- desc to include W_HASQUOTEDNULL if array_value returns QUOTED_NULL
- for an array reference like x[*] and the word is quoted. Fixes bug
- reported by Christophe Martin <schplurtz@free.fr>
-
- 6/1
- ---
-jobs.c
- - several changes to preserve errno if tcgetpgrp/tcgetattr/tcsetattr
- fail, for subsequent error messages
- - change initialize_job_control to turn off job control if the terminal
- pgrp == -1 or is not equal to shell_pgrp (with an error message)
- - in initialize_job_control, if the shell has been forced interactive
- with -i, make sure stderr is hooked to a tty before using it as
- the controlling terminal. If it's not, try to open /dev/tty and
- assign it to shell_tty. Fixes problems reported by Derek Fawcus
- <dfawcus@cisco.com>
-
- 6/13
- ----
-support/shobj-conf
- - changes to support shared object and shared library creation on AIX
- 5.x and later versions. From Niklas Edmundsson <nikke@acc.umu.se>
-
- 6/17
- ----
-builtins/mkbuiltins.c
- - new array of builtins, posix_builtins, containing builtins listed
- as special to the command search order by POSIX
- - add POSIX_BUILTIN to the builtin flags if the builtin name is one
- that's special to the posix command search order
-
-builtins.h
- - new define, POSIX_BUILTIN, means that a builtin is special to the
- posix command search order
-
- 6/22
- ----
-lib/readline/display.c
- - new macro, WRAP_OFFSET, intended to replace W_OFFSET. Takes prompt
- strings longer than one physical line with invisible characters on
- the second line into account when calculating the number of
- invisible characters on the current screen line
- - use WRAP_OFFSET where appropriate (update_line, _rl_move_cursor_relative)
- - change update_line to deal with adjusting _rl_last_c_pos in a
- multibyte environment when the prompt has invisible chars on the
- second line and redisplay has output the invisible characters
- - change _rl_move_cursor_relative to adjust _rl_last_c_pos in a
- multibyte environment when the prompt has invisible chars on the
- second line and the redisplay draws the invisible character. Fixes
- redisplay bug reported by Andreas Schwab <schwab@suse.de>
-
-
- 7/11
- ----
-
-lib/readline/rltty.c
- - enable flush-output code for systems other than AIX 4.1. Problem
- reported by Jan Kratochvil <jan.kratochvil@redhat.com>
-
- 7/12
- ----
-lib/readline/display.c
- - set prompt_invis_chars_first_line from the portion of the prompt
- following the final newline, instead of from the prefix. Fixes
- bug reported on the Ubuntu bug list by dAniel hAhler
- <ubuntu@thequod.de>
-
- 7/13
- ----
-variables.c
- - use native __QNX__ and __QNXNTO__ cpp defines instead of qnx and
- qnx6, respectively. Patch from Sean Boudreau <seanb@qnx.com>
-
-lib/sh/getcwd.c
- - #undef HAVE_LSTAT on qnx, so it uses stat instead. Patch from
- Sean Boudreau <seanb@qnx.com>
-
- 7/21
- ----
-builtins/common.c
- - change sh_invalidnum to be a little smarter about octal and hex
- numbers and change the message appropriately. Bug originally
- reported on coreutils list by Jürgen Niinre <Jyrgen.Niinre@emt.ee>
-
- 7/26
- ----
-test.c
- - make sure the string passed to test_unop has only a single character
- following the `-'. Fixes bug reported by Michael A. Smith
- <michael@smith-li.com>
-
-parse.y
- - better input validation: make sure a word looks like a conditional
- unary operator (-X) before calling test_unop
-
- 7/28
- ----
-trap.c
- - in trap_handler, if it's called directly from the signal handler
- (e.g., SIGINT sighandler, set by set_sigint_handler), but the
- trap disposition has been reset to the default between the
- assignment and receipt of the signal, check that the signal is
- trapped and issue a warning if the shell was compiled with
- debugging enabled. Fixes bug reported by Fergus Henderson
- <fergus@google.com>
-
- 8/1
- ---
-lib/readline/{util,histexpand}.c
- - fixes for small memory leaks from Michael Snyder <msnyder@sonic.net>
-
- 8/18
- ----
-Makefile.in
- - add dependency on builtins/builtext.h to nojobs.o list. Fixes
- `make -j 5' issue reported by Chris MacGregor <chris@bouncingdog.com>
-
-examples/loadables/Makefile.in
- - add @LDFLAGS@ to SHOBJ_LDFLAGS assignment -- experimental. Suggested
- by Mike Frysinger <vapier@gentoo.org>
-
-examples/loadables/{basename,cut,dirname,finfo,head,ln,logname,mkdir,pathchk,print,printenv,push,realpath,rmdir,sleep,tee,truefalse,tty,uname,unlink,whoami}.c
- - fix up some includes. Fix from Mike Frysinger <vapier@gentoo.org>
-
- 8/21
- ----
-histexpand.c
- - fix another memory leak in history_find_word. Bug report originally
- from Michael Snyder <msnyder@sonic.net>; test case suggested by Jim
- Blandy <jimb@codesourcery.com>
-
- 8/26
- ----
-subst.c
- - change to do_assignment_internal to make an assignment to a variable
- with the `noassign' internal attribute not a variable assignment
- error.
- - fix do_assignment_internal so assignment to a `noassign' variable
- does not cause it to suddenly become visible if it's currently
- invisible
-
- 9/3
- ---
-stringlib.c
- - change strsub to check whether or not temp is non-null before
- trying to null-terminate it. Also make sure temp is allocated
- even if the pattern and replacement strings are empty, and set
- to a copy of string (like ${foo//})
- Bug report from Timo Lindfors <timo.lindfors@iki.fi>
-
- 9/10
- ----
-{config.h,Makefile,configure}.in,aclocal.m4
- - new tests for fpurge and __fpurge
-
-lib/sh/fpurge.c, externs.h
- - new file, fpurge(3) implementation with external decl in externs.h
-
-builtins/common.c
- - add call to fpurge(stdout) to sh_chkwrite
-
-{redir,execute_cmd}.c
- - add call to fpurge(stdout) after fflush(stdout) before changing
- stdout file descriptor and after a builtin or function executes
-
- 9/12
- ----
-expr.c
- - make sure noeval is set to 0 when a longjmp occurs, since it will
- not be reset otherwise, and it can be set to 1 while processing
- a {pre,post}-increment or {pre,post}-decrement token
- - set noeval to 0 at the beginning of evalexp, since it's never
- called recursively
-
- 9/14
- ----
-config-top.h
- - new builder-modifiable define: DONT_REPORT_BROKEN_PIPE_WRITE_ERRORS
- Turning it on will cause errors from EPIPE to not be reported by
- the normal shell write error message mechanism
-
-builtins/common.c
- - if DONT_REPORT_BROKEN_PIPE_WRITE_ERRORS is defined, don't print an
- error message from sh_wrerror if errno == EPIPE. Suggestion from
- Petr Sumbera <petr.sumbera@sun.com>
-
- 9/19
- ----
-{jobs,nojobs}.c,jobs.h
- - add code to retry fork() after EAGAIN, with a progressively longer
- sleep between attempts, up to FORKSLEEP_MAX (16) seconds. Suggested
- by Martin Koeppe <mkoeppe@gmx.de>
-
- 9/21
- ----
-version.c
- - change copyright year to 2007
-
- 9/25
- ----
-pathexp.c
- - change quote_string_for_globbing to add a backslash in front of a
- backslash appearing in the pathname string, since the globbing
- code will interpret backslashes as quoting characters internally.
- Bug reported by <herbert@gondor.apana.org.au> on the debian list
- (443685)
-
- 10/8
- ----
-lib/readline/display.c
- - in update_line, make sure _rl_last_c_pos is > 0 before setting
- cpos_adjusted (or we actually moved the cursor to column 0 in
- _rl_move_cursor_relative). Fixes redisplay bug with prompt with
- only invisible characters reported by dAniel hAhler
- <ubuntu@thequod.de>
-
- 10/10
- -----
-lib/readline/display.c
- - in rl_redisplay, when calculating the new physical cursor position
- in a multibyte locale (`tx'), do not call rl_backspace if tx ends
- up < 0. Rest of fix for bug reported by dAniel hAhler
- <ubuntu@thequod.de>
-
- 10/12
- -----
-lib/sh/getcwd.c
- - fix memory overwrite problem that's possible if buf is NULL and
- passed size is greater than the pathname length. Reported by
- Ian Campbell <ian.campbell@xensource.com>
-
-builtins/ulimit.def
- - change the multiplier for the -c and -f options (`blocks') to 512,
- the traditional value (and the one POSIX specifies). Bug reported
- by Pete Graner <pgraner@redhat.com>
-
-braces.c
- - pass process substitution through unchanged the same as command
- substitution. Prompted by suggestion from Stephane Chazelas
- <stephane_chazelas@yahoo.fr>
-
-lib/readline/input.c
- - in rl_unget_char, fix off-by-one error when resetting pop_index if
- it's < 0. Bug reported by Uwe Doering <gemini@geminix.org>
-
-builtins/type.def
- - change exit status of `type' to not successful if any of the
- requested commands are not found. Reported by Stephane Chazleas
- <stephane_chazelas@yahoo.fr>
-
-pcomplete.c
- - change command_line_to_word_list to use rl_completer_word_break_characters
- instead of the shell metacharacters to split words, so programmable
- completion does the same thing readline does internally. Reported
- by Vasily Tarasov <vtaras@sw.ru>
-
- 10/16
- -----
-bashline.c
- - When completing a command name beginning with a tilde and containing
- escaped specical characters, dequote the filename before prefixing
- it to the matches, so the escapes are not quoted again. Reported
- by neil@s-z.org
-
- 10/17
- -----
-expr.c
- - in readtok(), don't reset lasttp if we've consumed the whitespace
- at the end of the expression string. Fixes error message problem
- reported by <anmaster@tele2.se>
-
- 11/1
- ----
-builtins/printf.def
- - change asciicode() to return intmax_t; add multibyte character
- support instead of assuming ASCII (depending on behavior of system
- multibyte support functions). Fixes bug reported by Rich
- Felker <dalias@aerifal.cx>
-
- 11/5
- ----
-execute_cmd.c
- - if redirections attached to a compound command fail, make sure to
- set last_command_exit_value when returning EXECUTION_FAILURE.
- Fixes bug reported separately by Andreas Schwab <schwab@suse.de>
- and Paul Eggert <eggert@cs.ucla.edu>
-
- 11/9
- ----
-builtins/read.def
- - make sure the return value from get_word_from_string is freed if
- non-null. Fixes memory leak bug reported by Lars Ellenberg
- <lars.ellenberg@linbit.com>
-
- 11/10
- -----
-variables.c
- - use getpid() as value of seeded_subshell to avoid problems with
- random number generator not getting re-seeded correctly when
- subshells are created. Fix from Tomas Janousek <tjanouse@redhat.com>
-
-lib/readline/display.c
- - in update_line(), when outputting characters at the end of the line,
- e.g., when displaying the prompt string, adjust _rl_last_c_pos by
- wrap_offset if the text we're drawing begins before the last
- invisible character in the line. Similar to fix from 5/24. Fixes
- bug reported by Miroslav Lichvar <mlichvar@redhat.com>
-
- 11/14
- -----
-subst.c
- - fix $[ expansion case to deal with extract_arithmetic_subst
- returning NULL (if the `]' is missing) and return the construct
- unchanged in that case. Fixes tab completion bug reported by
- Heikki Hokkanen <hoxu@users.sf.net> (debian bug 451263)
-
-lib/readline/mbutil.c
- - fix _rl_find_next_mbchar_internal to deal with invalid multibyte
- character sequences when finding non-zero-length chars. Fixes
- bug reported by Morita Sho <morita-pub-en-debian@inz.sakura.ne.jp>
-
- 11/15
- -----
-variables.c
- - add new function `seedrand' to seed the bash random number
- generator from more random data. Suggestion from Steve Grubb
- <sgrubb@redhat.com>
- - replace the rng in brand() with a slightly better one from FreeBSD
- (filtered through Mac OS X 10.5). Replacement suggested by
- Steve Grubb <sgrubb@redhat.com>
-
- 11/21
- -----
-configure.in
- - darwin 9 also requires linking against libreadline.a and
- libhistory.a because of Apple's questionable decision to ship a
- libreadline "replacement" that doesn't provide all functions
-
-doc/{bash.1,bashref.texi}
- - slight change to the text describing the effect of set -e when
- in a || or && list
-
- 12/5
- ----
-jobs.c
- - fix raw_job_exit_status to correct mixing of int/WAIT values (need
- to return a WAIT)
- - arrange so that children run as part of command substitutions also
- set the SIGINT handler to wait_sigint_handler, since they effectively
- don't do job control
- - in wait_for, if a child run as part of a command substitution exits
- due to SIGINT, resend the SIGINT to the waiting shell with kill(2).
- This makes sure the exit status propagates
-
-doc/{bash.1,bashref.texi}
- - tighten up the language describing when bash tries to see if its
- stdin is a socket, so it can run the startup files. Suggested by
- Vincent Lefevre <vincent@vinc17.org>
-
-eval.c
- - in the DISCARD case of a longjmp to top_level, make sure
- last_command_exit_value is set to EXECUTION_FAILURE if it's 0,
- but leave existing non-zero values alone
-
-subst.c
- - in command_substitute, don't reset pipeline_pgrp in the child
- process -- this means that second and subsequent children spawned by
- this comsub shell get put into the wrong process group, not the
- shell's. Fix for bug reported by Ingo Molnar <mingo@elte.hu>
-
- 12/6
- ----
-support/shobj-conf
- - make sure the cases for darwin8.x (Mac OS X 10.4.x) are extended to
- darwin9.x (Mac OS X 10.5.x). Fixes problem originally reported
- against readline-5.2 by schneecrash@gmail.com
-
- 12/8
- ----
-subst.c
- - make sure to add the results of (successful) tilde expansion as a
- quoted string, to inhibit pathname expansion and word splitting.
- From recent Austin Group interpretation.
-
-include/shtty.h, lib/sh/shtty.c
- - add ttfd_onechar, ttfd_noecho, ttfd_eightbit, ttfd_nocanon, and
- ttfd_cbreak to set tty attributes associated with a particular
- file descriptor (which is presumed to point to a terminal). Support
- for fix for bug reported by b_bashbug@thebellsplace.com
-
-lib/readline/display.c
- - make sure we only use rl_invis_chars_first_line when the number of
- physical characters exceeds the screen width, since that's the
- only time expand_prompt sets it to a valid value
-
- 12/12
- -----
-builtins/set.def
- - change set_minus_o_option to return EX_USAGE if an invalid option
- name is supplied. All callers can handle it.
- - change set_builtin to return what set_minus_o_option returns if it's
- not EXECUTION_SUCCESS. This allows EX_USAGE errors to abort a
- shell running in posix mode
-
- 12/14
- -----
-builtins/read.def
- - generalize the calls to the tty attribute functions to maintain a
- local copy of the terminal attributes and use the fd supplied as
- the argument to the -u option (default 0). Fix for bug reported
- by b_bashbug@thebellsplace.com
-
-doc/bashref.texi, lib/readline/doc/{history,rlman,rluser,rluserman}.texi
- - Slight changes to conform to the latest FSF documentation standards.
- Patch from Karl Berry <karl@freefriends.org>
-
- 12/20
- -----
-execute_cmd.c
- - after calling clear_unwind_protect_list, make sure we reset
- parse_and_execute_level to 0, since there's nothing left to
- restore it if top_level_cleanup tests it. Fixes bug reported
- by Len Lattanzi <llattanzi@apple.com>
-
- 12/31
- -----
-lib/sh/getcwd.c
- - new function, _path_checkino, checks whether the inode corresponding
- to the path constructed from the first two arguments is the same as
- the inode number passed as the third argument
- - if BROKEN_DIRENT_D_INO is defined, meaning the d_ino/d_fileno
- member of struct dirent doesn't contain valid values, use
- _path_checkino instead of directly comparing against d_fileno.
- Fixes Interix problem reported by Michael Haubenwallner
- <haubi@gentoo.org>
-
- 1/7/2008
- --------
-array.c
- - fix array_subrange to separate elements in returned string with
- first char of $IFS if QUOTED is non-zero, since this indicates
- the caller used ${array[@]:foo}. Fixes bug reported by Lea
- Wiemann <lewiemann@gmail.com>
-
- 1/8
- ---
-subst.c
- - new function returning a string containing the first character of
- $IFS: char *ifs_firstchar(int *)
-
-subst.h
- - extern declaration for ifs_firstchar()
-
-array.c
- - call ifs_firstchar() to get first character of $IFS when needed
- (array_subrange() and array_patsub())
-
- 1/11
- ----
-lib/readline/display.c
- - use sentinel variable set at end of init_line_structures to decide
- whether to call it from rl_redisplay, since early SIGWINCH on
- Mac OS X that hits during this function can cause _rl_wrapped_line
- to be referenced before initialization. Fix for bug reported by
- Len Lattanzi <llattanzi@apple.com>
-
-subst.[ch]
- - skip_to_delim is now compiled into the shell all the time, not just
- when readline is linked in
-
-subst.c
- - use skip_to_delim to find the `/' denoting the end of a pattern
- in pattern substitution, since it knows more shell syntax than
- quoted_strchr and understands multibyte characters. Fixes bug
- reported by Dmitry V Golovashkin <Dmitry.Golovashkin@sas.com>
-
- 1/15
- ----
-subst.c
- - add `flags' argument to skip_to_delim telling it whether or not to
- set no_longjmp_on_fatal_error; set this flag when calling from the
- readline completion code
-
-subst.h
- - update extern declaration for skip_to_delim
-
- 1/17
- ----
-subst.c
- - expand_prompt_string takes a third argument: the initial flags for
- the WORD
-
-subst.h
- - change extern declaration for expand_prompt_string to add third arg
-
-bashline.c
- - pass W_NOCOMSUB as third argment to expand_prompt_string when
- calling from bash_directory_completion_hook, since we don't want
- to do command substitution from the completion code
-
-parse.y
- - change call to expand_prompt_string
-
- 1/18
- ----
-doc/Makefile.in
- - added an `install_builtins' rule to install the builtins.1 man page,
- preprocessing it with sed to force `.so man1/bash.1', which some
- versions of man require. Suggestion from Peter Breitenlohner
- <peb@mppmu.mpg.de>
- - new target `install_everything' that will install normal documentation
- and builtins man page
- - changed uninstall target to remove bash_builtins page from man
- directory
-
-lib/readline/vi_mode.c
- - new function, rl_vi_insert_mode, which calls rl_vi_start_inserting
- to make sure the value of `last command to repeat' is set correctly.
- Fix from Thomas Janousek <tjanouse@redhat.com>
- - add support for redoing inserts made with the `I' command. Fix
- from Thomas Janousek <tjanouse@redhat.com>
- - add support for redoing inserts made with the `A' command
-
-lib/readline/readline.h
- - new extern declaration for rl_vi_insert_mode
-
-lib/readline/{misc,readline,vi_mode,vi_keymap}.c
- - change calls to rl_vi_insertion_mode to rl_vi_insert_mode
-
- 1/19
- ----
-builtins/read.def
- - change timeout behavior when not reading from a tty device to save
- any partial input in the variable list, but still return failure.
- This also causes variables specified as arguments to read to be
- set to null when there is no input available. Fix inspired by
- Brian Craft <bcboy@thecraftstudio.com>
-
- 1/21
- ----
-builtins/fc.def
- - change computation of last_hist to use remember_on_history instead
- of a hard-coded `1'. This keeps fc -l -1 in PROMPT_COMMAND from
- looking too far back
-
- 1/25
- ----
-lib/readline/complete.c
- - fix fnwidth to use string[pos] instead of *string when testing the
- current character for a control character or rubout
-
- 2/2
- ---
-general.c
- - change posix_initialize to turn off source/. searching $PWD when
- the file sourced is not found in $PATH. Fixes bug reported by
- Paolo Bonzini <bonzini@gnu.org> and Eric Blake <ebb9@byu.net>
-
- 2/9
- ---
-builtins/*.def
- - changes to text and formatting suggested by Jan Schampera
- <jan.schampera@web.de>
-
- 2/16
- ----
-bashline.c
- - change command_word_completion_function to use the word completion
- found by readline, which matters only when ignoring case is on
- and the completion found in the file system differs in case from
- the text the user typed (this is what readline does for normal
- filename completion). Fixes issue reported by Jian Wang
- <jwang@a10networks.com.cn>.
-
- 2/18
- ----
-builtins/source.def
- - if the filename passed as an argument contains a `/', don't search
- $PATH. Not sure why it wasn't like this before
-
- 2/21
- ----
-lib/readline/terminal.c
- - change rl_crlf so that the MINT system on ATARI systems adds a
- carriage return before the \n
-
- 2/22
- ----
-doc/{bash.1,bashref.texi}
- - added text to the EXIT STATUS section noting that exit statuses
- fall between 0 and 255, inclusive
-
-support/mkversion.sh
- - output a #define for DEFAULT_COMPAT_LEVEL (${major}${minor}; e.g. 32)
- to version.h
-
-version.c
- - int variable, shell_compatibility_level, set to DEFAULT_COMPAT_LEVEL
- by default
-
-builtins/shopt.def
- - new shopt variable, compat31, sets shell_compatibility_level to 31
- (or back to default if unset)
-
-execute_cmd.c
- - in execute_cond_node, restore bash-3.1 behavior of quoted rhs of
- regexp matches if shell_compatibility_level == 31
-
- 2/28
- ----
-lib/readline/rltty.c
- - set readline_echoing_p = 1 if tcgetattr fails and sets errno to
- EINVAL, as Linux does when the fd is a pipe. Reported by Mike
- Frysinger <vapier@gentoo.org>
-
- 3/6
- ---
-{MANIFEST,Makefile.in},lib/sh/{casemod,uconvert,ufuncs}.c
- - new library sources from bash-4.0-devel tree
-
-lib/sh/spell.c
- - moved cdspell() here from builtins/cd.def, renamed dirspell()
-
-externs.h
- - new declarations for extern functions from new library files
- - new extern declaration for lib/sh/spell.c:dirspell()
-
-builtins/cd.def
- - call extern library function dirspell(); remove static cdspell()
-
-builtins/read.def
- - when read times out, make sure input_string is null-terminated before
- assigning any partial input read to the named variables
-
- 3/10
- ----
-lib/glob/xmbsrtowcs.c
- - cut the number of memory allocations in xdupmbstowcs by not keeping
- track of the indices if the caller hasn't asked for it
-
- 3/17
- ----
-builtins/fc.def
- - make sure the adjustment to i in fc_gethnum uses the same formula
- fc_builtin uses to calculate last_hist
- - make sure that every time fc_gethnum is called, the fc command last
- in the history list has not yet been deleted, since fc_gethnum
- assumes that it has not. Fix from John Haxby <john.haxby@oracle.com>
-
-lib/readline/complete.c
- - new private library function, _rl_reset_completion_state(), used to
- reset any completion state internal to the library when a signal
- is received
- - call _rl_reset_completion_state() before returning from
- rl_complete_internal
-
-lib/readline/rlprivate.h
- - new extern declaration for _rl_reset_completion_state
-
-lib/readline/signals.c
- - call _rl_reset_completion_state from rl_signal_handler on SIGINT.
- This fixes one of the problems identified by Mika Fischer
- <mf+ubuntu@zoopnet.de>
-
-pcomplete.c
- - programmable_completions now saves pointer to the compspec it's
- working with in new global variable CURCS
- - new function, pcomp_set_readline_variables, that sets or unsets
- readline variables based on a passed flags value (COPT_FILENAMES,
- etc.)
- - new function, pcomp_set_compspec_options, to set or unset bits in
- the options word of a passed compspec (default CURCS)
- - only call bash_dequote_filename (via rl_filename_dequoting_function)
- from pcomp_filename_completion_function if the readline state
- word indicates word completion is in progress
-
-pcomplete.h
- - new extern declaration for curcs
- - new extern declaration for pcomp_set_readline_variables
- - new extern declaration for pcomp_set_compspec_options
-
-bashline.c
- - fix bash_dequote_filename to implement shell quoting conventions:
- 1. Inhibit backslash stripping within single quotes
- 2. Inhibit backslash stripping within double quotes only if
- the following character is one of the special ones
- - call pcomp_set_readline_variables from attempt_shell_completion
- instead of doing the equivalent inline
-
- 3/18
- ----
-bracecomp.c
- - make sure we sort array of matches in byte order (using strcmp). so
- the brace calculations work correctly even when the locale orders
- characters like aAbBcC...zZ. Fixes bug reported by Torsten Nahm
- <torstennahm@torstennahm.de>
-
- 3/20
- ----
-lib/readline/{rltty,signals}.c
- - move block_sigint and release_sigint from rltty.c to signals.c; add
- _rl_ prefix to make them public to the library; change callers.
- From Jan Kratochvil <jan.kratochvil@redhat.com>
-
-lib/readline/rlprivate.h
- - new extern declarations for _rl_block_sigint and _rl_release_sigint
-
-lib/readline/display.c
- - add calls to _rl_block_sigint and _rl_release_sigint to rl_redisplay,
- since it maniupluates global data structures. Fix from Jan
- Kratochvil <jan.kratochvil@redhat.com>
-
-builtins/printf.def
- - change calls to asprintf and manually adding to vbuf to use calls
- to vsnprintf against vbuf directly -- if the number of characters
- to be written overflows the buffer, realloc the buffer and use
- vsnprintf again. This should reduce the memory used by printf.
- Idea from Yuya Katayama <yuya999@gmail.com>
-
-lib/readline/doc/rltech.texi
- - documented rest of readline's state flags, including RL_STATE_CALLBACK
- - documented rl_save_state and rl_restore_state
-
- 3/27
- ----
-lib/readline/{rlprivate.h,{display,readline,rltty,terminal,text}.c}
- - rename readline_echoing_p to _rl_echoing_p for namespace consistency
-
-lib/readline/{rlprivate.h,{callback,readline,util}.c}
- - rename readline_top_level to _rl_top_level for namespace consistency
-
-builtins/ulimit.def
- - new -b (socket buffer size) and -T (number of threads) options
-
-array.c
- - fix bug in calculation of the array element assignment string length:
- use length of `is' instead of `indstr'. Reported as ubuntu bug
- #202885 by John McCabe-Dansted
-
-builtins/setattr.def
- - new function, show_all_var_attributes, displays attributes and
- values for all shell variables (or shell functions) in a reusable
- format
-
-builtins/common.h
- - new extern declaration for show_all_var_attributes
-
-builtins/declare.def
- - change `declare -p' to print out all variable attributes and values,
- and `declare -fp' to print out all function attributes and
- definitions. Inspired by request from John Love-Jensen
- <eljay@adobe.com>
-
-doc/{bash.1,bashref.texi}
- - document new -b and -T options to ulimit
- - tighten up language describing AND and OR lists
- - add description of new behavior of `declare -p'
-
- 3/28
- ----
-pcomplete.c
- - rename curcs -> pcomp_curcs
- - new global completion variable, pcomp_curcmd, the current command
- name being completed
-
-builtins/complete.def
- - new builtin, compopt, allows completion options for command names
- supplied as arguments or the current completion being executed to
- be modified. Suggested by Mika Fischer <mf+ubuntu@zoopnet.de>
-
- 3/30
- ----
-doc/{bash.1,bashref.texi},lib/readline/doc/rluser.texi
- - document new compopt builtin
-
- 4/5
- ---
-support/shobj-conf
- - change solaris10 stanza to use -fPIC to fix 64-bit sparc_v9/solaris10
- compilations. Fix from Fabian Groffen <grobian@gentoo.org>
-
-builtins/read.def
- - added `-i text' option, inserts `text' into line if using readline.
- Suggested by many, used some ideas from Kevin Pulo <kevin@pulo.com.au>
-
-doc/{bash.1,bashref.texi}
- - document new `-i text' option to read builtin
-
- 4/7
- ---
-lib/readline/bind.c
- - new settable variable, `history-size', sets the max number of
- entries in the history list
-
-doc/bash.1,lib/readline/doc/{rluser.texi,readline.3}
- - document new `history-size' settable readline variable
-
- 4/8
- ---
-builtins/complete.def
- - change build_actions calling sequence to take a struct with `other'
- (non-action) flag arguments (-p, -r)
- - add support for `-E' option to build_actions and complete builtin --
- modifies or displays (internal) `_EmptycmD_' completion spec
-
-bashline.c
- - change attempt_shell_completion to try programmable completion on an
- `empty' command line and return the results
-
-doc/bash.1,lib/readline/doc/rluser.texi
- - documented new `-E' option to `complete'
-
- 4/9
- ---
-bashhist.c
- - new variable, `enable_history_list', used to reflect setting of
- `-o history' option
- - change bash_history_{enable,disable,reinit} to set enable_history_list
- as well as remember_on_history
-
-builtins/set.def
- - use `enable_history_list' instead of `remember_on_history' to keep
- value of `-o history' option
-
-builtins/evalstring.c
- - instead of unwind-protecting remember_on_history, use a function to
- restore it to the value of `enable_history_list' after
- parse_and_execute runs the commands in the string. This allows
- history to be turned off in a startup file, for instance. Problem
- reported by Dan Jacobson <jidanni@jidanni.org>
-
- 4/11
- ----
-bashline.c
- - limited support for completing command words with globbing characters
- (only a single match completed on TAB, absolute or relative
- pathnames supported, no $PATH searching, some support for displaying
- possible matches, can be used with menu completion).
- Suggested by Harald Koenig <h.koenig@science-computing.de>
-
-print_cmd.c
- - change redirection printing to output r_err_and_out as `&>file',
- since the man page says that's the preferred form
-
- 4/12
- ----
-builtins/*.def
- - change long doc so the first line is a short description
- - add `Exit Status:' section to each longdoc describing exit values
-
-builtins/help.def
- - new `-d' option to print short description of each utility
- - new `-m' option to print description of each builtin in a
- pseudo-manpage format (inspired by ksh93)
-
-doc/{bash.1,bashref.texi}
- - document new `-d' and `-m' options to `help'
-
-builtins/mapfile.def
- - new builtin, `mapfile', imported from bash-4.0-devel branch
-
-tests/{mapfile.{data,right,tests},run-mapfile}
- - tests for `mapfile' builtin
-
-doc/{bash.1,bashref.texi}
- - added description of `mapfile' builtin
-
-MANIFEST,Makefile.in,builtins/Makefile.in
- - added entries for mapfile source files
-
-arrayfunc.[ch]
- - new function, bind_array_element, to support mapfile builtin
-
- 4/20
- ----
-expr.c
- - fix operator precendence in expcond(): term after the `:' is
- a conditional-expression, not a logical-OR-expression (using C
- terminology). Bug reported by <archimerged@gmail.com>
-
- 4/22
- ----
-bashintl.h
- - new P_ define for using ngettext to decide on plural forms
- (currently unused)
-
- 4/25
- ----
-execute_cmd.c
- - in execute_disk_command, if the command is not found, search for
- a shell function named `command_not_found_handle' and call it
- with the words in the command as arguments. Inspired by Debian
- feature.
-
-doc/{bash.1,bashref.texi}
- - document new command_not_found_handle behavior in COMMAND EXECUTION
- section
-
-configure.in
- - change default version to bash-4.0-devel
-
- 4/28
- ----
-variables.c
- - change push_func_var and push_exported_var to call
- stupidly_hack_special_variables if the temporary variable is going
- to be disposed. This undoes any internal changes caused by a local
- variable assignment in the environment or in a shell function. Bug
- reported by Morita Sho <morita-pub-en-debian@inz.sakura.ne.jp> in
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=478096
-
- 5/3
- ---
-builtins/fc.def
- - fixed a problem caused by change of 1/21 to use remember_on_history,
- since it's turned off by parse_and_execute(), but can cause the
- last command in history to be deleted and leave last_hist pointing
- beyond the end of the history list. edit_and_execute_command can
- do this.
-
-bashline.c
- - new define, RL_BOOLEAN_VAR_VALUE, to take a readline boolean variable
- and get its value as 0 or 1 (consider making readline global)
- - put tty back into canonical mode before calling parse_and_execute in
- edit_and_execute_command and then back into raw mode after it
- returns. Fixes problem identified by <koersen@gmail.com>.
-
- 5/4
- ---
-lib/glob/glob.c
- - code to support `globstar' option: GX_GLOBSTAR and two internal
- flags. Changes to skipname, glob_vector, mbskipname, glob_filename.
- New function finddirs().
-
-lib/glob/glob.h
- - new defines to support globstar code
-
-builtins/shopt.def
- - new shell option, `globstar', enables special handling of `**' in
- glob patterns -- matches all directories recursively
-
-pathexp.h
- - extern declaration for glob_star
-
-pathexp.c
- - break inline code out of quote_globbing_chars into a separate
- function to decide whether a character is a globbing char:
- glob_char_p
- - change shell_glob_filename to call glob_filename with the
- GX_GLOBSTAR flag if glob_star is set
-
-doc/{bash.1,bashref.texi}
- - document new `globstar' shell option
-
-arrayfunc.c
- - new function, broken out of quote_array_assignment_chars:
- quote_assign; extended from old code to make sure that globbing
- chars and chars in $IFS are quoted when displaying assignment
- statements, especially in compound array assignments
-
- 5/5
- ---
-bashline.c
- - new variable, dircomplete_spelling, controls spelling correction
- of directory names when doing filename completion
- - change bash_directory_completion_hook to incorporate spelling
- correction if initial canonicalization of directory name fails
-
-builtins/shopt.def
- - new shell option, `dirspell', enables and disables spelling
- correction of directory names during word completion
-
-builtins/read.def
- - support for fractional timeout values (ival.uval); uses uconvert
- and falarm/setitimer
-
-config.h.in
- - new `HAVE_SETITIMER' define
-
-configure.in
- - look for setitimer(2), define HAVE_SETITIMER if found
-
-doc/{bash.1,bashref.texi}
- - document new `dirspell' shopt option
- - document new fractional values to `read -t timeout'
-
- 5/6
- ---
-assoc.[ch]
- - new files, basic support for associative array implementation
-
-general.h
- - new extern declarations for sh_openpipe, sh_closepipe, trim_pathname
-
-general.c
- - new functions: sh_openpipe to create a pipe and move the file
- descriptors to a high range; sh_closepipe, to close pipe fds and
- clean up, and trim_pathname, to replace portions of a pathname
- with `...' (for prompting)
-
-jobs.c
- - don't set last_asynchronous_pid in child shell (messes up $!, among
- other things)
-
-parse.y,parser.h
- - moved definitions of parser flags to parser.h
-
-array.c
- - imported array_modcase (case-changing operations on arrays) from
- 4.0-devel branch
-
-array.h
- - new extern declaration for array_modcase
-
-lib/readline/complete.c
- - new variable, rl_menu_completion_entry_function, generator for
- rl_menu_complete
- - new menu completion `browsing' implementation, with several
- improvements over the old code. Inspired by Sami Pietila
- <sami.pietila@gmail.com>
-
-lib/readline/readline.h
- - extern declaration for rl_menu_completion_entry_function
-
- 5/8
- ---
-lib/readline/complete.c
- - add support for a third argument to fnprint and print_filename,
- which supports replacing a specified portion of the pathnames
- printed when displaying possible completions with a `...' (or
- `___', if the prefix would be confused with a portion of the
- filename)
- - new variable, _rl_completion_prefix_display_length, sets the
- number of characters in a common prefix to be replaced with an
- ellipsis when displaying possible completions
- - add support to _rl_display_match_list to find the length of the
- common prefix of all items being displayed, and passing that
- value to print_filename for possible replacement with an ellipsis
- if that length is longer than _rl_completion_prefix_display_length
-
-lib/readline/bind.c
- - add support for retrieving value of history-size variable to
- _rl_get_string_variable_value
- - new bindable variable, completion-prefix-display-length. When
- displaying possible completions, matches with a common prefix
- longer than this value have the common prefix replaced with an
- ellipsis
- - support for retrieving value of completion-prefix-display-length
- variable to _rl_get_string_variable_value
- - new bindable variable, revert-all-at-newline: if enabled, causes
- all changes in history lines to be undone before readline returns
- after processing a newline
-
-doc/bash.1,lib/readline/doc/{readline.3,rluser.texi}
- - document new `completion-prefix-display-length' variable
- - document new `revert-all-at-newline' variable
-
-execute_cmd.c
- - change execute_builtin to not inherit the `-e' flag into commands
- executed by the `command' or `source/.' builtins if we are supposed
- to be ignoring the return value. This is like `eval'. Fixes bug
- reported by Hiroshi Fujishima <hirobo@tonteki.org>
-
- 5/10
- ----
-variables.c
- - when reading the initial environment, don't create variables with
- names that are not valid shell identifiers. Fixes bug reported by
- Stephane Chazleas <stephane_chazelas@yahoo.fr>
-
- 5/13
- ----
-subst.c
- - fix string_quote_removal to gracefully handle the case where a
- backslash is the final character in the string (leaves the backslash
- in place). Fixes bug reported by Ian Robertson
- <iroberts@u.washington.edu>
-
- 5/16
- ----
-support/checkbashisms
- - Perl script that purports to check for bash-specific features in a
- shell script. Lifted from Debian via ubuntu
-
- 5/20
- ----
-lib/readline/display.c
- - in update_line, when deciding whether or not to adjust _rl_last_c_pos
- in a multibyte environment after printing the last line of a multiline
- prompt with invisible characters on the first and last lines, use
- the number of inivisible chars on the first line in the calculation
- deciding whether or not we're past the last invisible character and
- need to adjust the cursor position. Old code used the number of
- invisible chars on the last prompt line. Fixes bug reported by
- stuff@slinkp.com.
- - in update_line, when fixing _rl_last_c_pos after drawing the first
- line of the prompt, use the number of invisible chars on the first
- line as the offset, instead of the total number of invisible chars
- - use prompt_multibyte_characters, the number of multibyte chars in
- the prompt string, to short-circuit some relatively expensive
- multibyte text processing in rl_redisplay
-
- 5/21
- ----
-variables.c
- - new function, reinit_special_variables(), a hook for special
- vars that need their hook functions called when they're unset as
- a result of the shell reinitializing itself to run a script
-
-shell.c
- - shell_reinitialize now calls reinit_special_variables
- - shell_reinitialize now calls bashline_reset
-
-variables.h
- - new extern declaration for reinit_special_variables
-
-bashline.c
- - new function, bashline_reset(), called when the shell reinitializes
- in shell_reinitialize. Right now, just resets
- bash_readline_initialized to 0.
-
-bashline.h
- - new extern declaration for bashline_reset()
-
- 5/23
- ----
-bashhist.c
- - new function, bash_clear_history, clears the history and resets any
- associated internal bash state
-
-bashhist.h
- - extern declaration for bash_clear_history
-
-builtins/history.def
- - call bash_clear_history instead of clear_history for `history -c'.
- Fixes part of problem reported by Scott McDermott
- <scott.m.mcdermott@gmail.com>
- - decrement history_lines_this_session in delete_histent, called for
- `history -d'
-
-builtins/history.def,bashhist.[ch]
- - move delete_histent() to bashhist.c; rename to bash_delete_histent
- - move delete_last_history() to bashhist.c; rename to
- bash_delete_last_history()
-
- 5/25
- ----
-braces.c
- - add another parameter to mkseq(), the number of digits to put into
- each member of a numeric sequence (width), changes to determine
- any zero-padding go into expand_seqterm
- - changes to expand_seqterm to allow user-specified increments
-
-bashline.[ch],shell.c,sig.c
- - switched names of bashline_reinitialize and bashline_reset to better
- reflect their functions
- - when searching $PATH for directories to use for command completion,
- make sure to free `current_path' before going out of scope
- - new bindable function `dabbrev-expand', which is more or less
- menu completion using dynamic history completion as the generator
- - changes to bash_execute_unix_command to set variables for the
- executed command like programmable completion: READLINE_LINE
- (rl_line_buffer) and READLINE_POINT (rl_point)
- - change to bash_execute_unix_command to allow the executed command
- to change the readline line buffer by modifying the value of
- READLINE_LINE and to change rl_point by modifying the value of
- READLINE_POINT
-
-common.h
- - new SEVAL_ defines for later parse_string changes from 4.0-devel
- branch
-
-command.h
- - new defines for new &>> r_append_err_and_out redirection
-
-builtins/evalstring.c
- - new function, parse_string, parses a command from a passed string
- and returns the number of characters consumed. For satisfying
- Posix rules when parsing command substitutions, from bash-4.0-devel
- branch
- - split out common prolog code from parse_string and
- parse_and_execute into a separate function called from both
-
-parse.y
- - small changes to add symbols needed for parse_string
- - parser change to add `|&' as synonym for `2>&1 |'; translation is
- performed at parse time so |& never shows up in output of
- print_command, for instance. Picked up from zsh, merged in from
- bash-4.0-devel branch
-
-parse.y,{redir,copy_cmd,dispose_cmd,make_cmd,print_cmd}.c
- - implement new &>> r_append_err_and_out (like >>foo 2>&1); merged
- in from bash-4.0-devel branch
-
-doc/{bash.1,bashref.texi},lib/readline/doc/rluser.texi
- - document new optional increment in brace expansion
- - document new zero-padded fixed-width integer brace expansion
- - document new `dabbrev-expand' bindable readline command
- - document new effects of `bind -x' setting and reading the values of
- READLINE_LINE and READLINE_POINT
- - document new |& synonym for `2>&1 |' pipeline operator
-
- 5/26
- ----
-parse.y - recognize new ;& and ;;& case action list terminator tokens and
- implement them in the grammar, setting CASEPAT_FALLTHROUGH and
- CASEPAT_TESTNEXT flags as appropriate
-
-print_cmd.c
- - print new ;& and ;;& case clause action list terminators as
- appropriate
-
-execute_cmd.c
- - implement new case clause action list terminators:
- ;& - fall through to actions associated with next pattern list
- ;;& - fall through to tests in next pattern list
-
-doc/{bash.1,bashref.texi}
- - document new ;& and ;;& case clause action list terminators
-
- 5/28
- ----
-jobs.c
- - change waitchld so it treats SIGCHLD like SIGINT if `wait' is being
- executed, and allows wait to jump out before running any trap set
- on SIGCHLD. Fixes debian bug #483016 reported by Miroslav Rudisin
- <miero@atrey.karlin.mff.cuni.cz>
- - run_sigchld_trap is no longer static, so the trap code in trap.c
- can call it
- - change run_sigchld_trap to call set_impossible_sigchld_trap instead
- of just using a call to restore_default_signal
-
-jobs.h
- - new extern declaration for run_sigchld_trap
-
-trap.c
- - fix run_pending_traps to run a SIGCHLD trap if the trap handler isn't
- set to IMPOSSIBLE_TRAP_HANDLER
- - in trap_handler, don't reset the SIGCHLD trap handler to trap_handler
- if MUST_REINSTALL_SIGHANDLERS is defined
- - new function, set_impossible_sigchld_handler, sets the trap string
- associated with SIGCHLD to IMPOSSIBLE_TRAP_HANDLER; used as a sentinel
- by run_sigchld_trap and maybe_set_sigchld_handler
- - change maybe_set_sigchld_handler to set the SIGCHLD trap string only
- if the current value is IMPOSSIBLE_TRAP_HANDLER. This ensures that
- any traps on SIGCHLD set in a SIGCHLD handler will persist. Fixes
- debian bug #483016 reported by Miroslav Rudisin
- <miero@atrey.karlin.mff.cuni.cz>
-
-trap.h
- - new extern declaration for set_impossible_sigchld_trap
-
- 5/31
- ----
-parse.y
- - new function: parse_comsub(), parses $(...) by parsing command
- between parens and making sure the next token is `)'. From
- the bash-4.0-devel branch
- - new function: xparse_dolparen, helper function for parsing
- command substitutions in $(...). Called from subst.c to extract
- a command substitution during word expansion. From bash-4.0-devel
- branch
- - new function: rewind_input_stream(). Rewinds bash_input.location.string
- back to where it was before the shell parsed a $() command
- substitution. From bash-4.0-devel branch
- - changes to parse_matched_pair to combine most of the flag variables
- (was_dollar, in_comment, and so on) into a local flags word
-
- 6/2
- ---
-parse.y
- - call trim_pathname, which retains only the last $PROMPT_DIRTRIM
- directories and replaces the intervening characters with `...',
- when expanding \w and \W
-
-doc/{bash.1,bashref.texi}
- - document the effect of setting PROMPT_DIRTRIM
-
- 6/3
- ---
-builtins/ulimit.def
- - make the multiplier (block size) for -c and -f 512 bytes only if in
- Posix mode and 1024 bytes otherwise (as in previous versions). Uses
- POSIXBLK and BLOCK_SIZE defines to parameterize size based on value
- of posixly_correct
-
-doc/bashref.texi
- - document this addition to posix mode
-
-builtins/common.c
- - change get_numeric_arg to have a calling sequence and return value
- more closely mimicking general.c:legal_number(), with the addition
- of a flags word
- - add extra value for `fatal' argument to get_numeric_arg to force it
- to return failure to the caller rather than longjmping
-
-builtins/common.h
- - change prototype declaration for get_numeric_arg
-
-builtins/{break,shift}.def
- - change calls to get_numeric_arg to deal with new semantics and calling
- sequence
-
-builtins/history.def
- - display_history now returns an int
- - change calling sequence for get_numeric_arg in display_history
- - display_history now returns failure to the caller if get_numeric_arg
- detects an invalid number, rather than jumping back to the top level
- - use value returned by display_history as return status of history
- builtin, filtered through sh_chkwrite
- - history no longer aborts compound commands on invalid arguments.
- fixes problem reported by Chu Li <chul@cn.fujitsu.com>
-
-{braces,subst}.c
- - extract_command_subst now takes a third flags argument; passed flags
- are ORd into flags passed to other functions; changed callers
-
-subst.h
- - move SX_* defines here from subst.c so parse.y:xparse_dolparen can
- see them and behave appropriately
- - extract_command_subst now takes a third flags argument; change
- prototype
-
-subst.c
- - change extract_command_subst to call xparse_dolparen when extracting
- a $() construct
- - change calls to extract_delimited_string to extract_command_subst
- as appropriate
- - if command_substitute returns a NULL word desc, don't call
- dispose_word_desc on it
-
-parse.y
- - change xparse_dolparen to use the SX_* flags now in subst.h
-
- 6/16
- ----
-subst.c
- - in quote_list, set W_HASQUOTEDNULL flag in the word if quote_string
- turns "" into CTLNUL
- - in dequote_list, turn off W_HASQUOTEDNULL flag in the word if
- dequote_string turns CTLNUL into ""
- - new function, string_list_pos_params, encapsulates everything
- needed to turn the positional parameters or an array indexed with
- '@' or '*' into a string, including taking care of quoting and
- using the first char of $IFS, when used in another expansion like
- pattern removal or pattern substitution
- - change list_remove_pattern, pos_params, pos_params_pat_subst to
- call string_list_pos_params. Fixes problems reported by
- Stephane Chazelas <stephane_chazelas@yahoo.fr>
-
- 6/22
- ----
-variables.h
- - include assoc.h for associative arrays
- - defines for case-modifying expansions and associative array variables
- - sh_var_assign_func_t functions now take an extra char * parameter
-
- 6/25
- ----
-variables.c
- - change declarations and definitions of sh_var_assign_func_t functions
- to add the extra char * parameter: null_assign, null_array_assign,
- assign_seconds, assign_random, assign_lineno, assign_subshell,
- assign_dirstack
- - change calls to var->assign_func to add extra char * argument
- - broke part of body of dispose_variable out into a new function,
- dispose_variable_value, which knows how to free all kinds of shell
- variable data
- - changes to deal with variables with the internal `nofree' attribute
-
-arrayfunc.c
- - change calls to var->assign_func to add extra char * argument
- - bind_array_var_internal now takes an extra `char *key' argument
- - additions for associative array implementation; from bash-4.0-devel
- tree
-
-arrayfunc.[ch],subst.c
- - expand_compound_array_assignment now takes the variable as the first
- argument (SHELL_VAR *); changed function definition and callers
-
-builtins/set.def
- - changes to handle associative arrays in `unset'
-
-{execute_cmd,command}.h
- - definitions for coproc implementation; from bash-4.0-devel tree
-
-variables.c
- - new functions for associative arrays: make_new_assoc_variable,
- make_local_assoc_variable
-
- 6/26
- ----
-variables.c
- - more infrastructure for associative arrays; from bash-4.0-devel tree
- - infrastructure for handling assignments to variables with
- case-modifying attributes; from bash-4.0-devel tree
-
-config.h.in
- - add #defines controlling case-modifying variable attributes and word
- expansions
-
-configure.in
- - add enable options for case-modifying variable attributes and word
- expansions (--enable-casemod-attributes and --enable-casemod-expansions,
- respectively); from bash-4.0-devel tree
-
-execute_cmd.c
- - add code to fix_assignment_words to handle assignment statements to
- "assignment builtins" that seem to be associative arrays. Imperfect
-
-subst.c
- - array_remove_pattern now takes a SHELL_VAR * as its first argument
- instead of an ARRAY *; from the bash-4.0-devel tree
- - changes to array_length_reference for associative arrays; from the
- bash-4.0-devel tree
- - changes to get_var_and_type for associative arrays; from the
- bash-4.0-devel tree
- - changes to parameter_brace_substring for associative arrays; from the
- bash-4.0-devel tree
- - changes to param_expand for associative arrays; from the
- bash-4.0-devel tree
-
-builtins/declare.def
- - changes for associative arrays: new `-A' option, changes to make
- local and global associative array variables; from the bash-4.0-devel
- tree
-
- 6/27
- ----
-execute_cmd.c
- - in execute_command_internal, when short-circuiting execution
- because `breaking' or `continuing' is non-zero, preserve the exit
- status by returning `last_command_exit_value' instead of an
- unconditional EXECUTION_SUCCESS. Fixes bug reported by Roman
- Rakus <rrakus@redhat.com>
-
- 6/28
- ----
-variables.c
- - fix get_var_and_type to appropriately handle references like
- ${varname[0]}, where `varname' is a scalar variable
-
-make_cmd.[ch],parse.y
- - make_here_document now takes a second argument: the current line
- number; changed caller (gather_here_documents)
-
-builtins/setattr.def
- - added support for associative arrays and the `-A' variable attribute
- option; from the bash-4.0-devel tree
-
-subst.c
- - change code that transforms `declare -A xxx=(yyy)' to perform the
- internal `declare -A xxx' before doing the variable assignment,
- because associative arrays have to be declared before being assigned
- to as such; uses new function make_internal_declare
-
- 6/30
- ----
-subst.[ch]
- - dequote_escapes is now external; add declaration in subst.h
- - remove_quoted_nulls is now external; add declaration in subst.h
-
-array.[ch]
- - new functions for completeness: array_dequote, array_dequote_escapes,
- array_remove_quoted_nulls
- - array_subrange now calls array_remove_quoted_nulls for "${array[*]}".
- Fixes bug reported by Vitor De Araujo <ux386@yahoo.com.br>
- - array_patsub now calls array_remove_quoted_nulls for "${array[*]}"
- - array_modcase now calls array_remove_quoted_nulls for "${array[*]}"
- - array_patsub now handles the mflags&MATCH_QUOTED case appropriately
- (that implies "${array[@]}")
-
-subst.c
- - new functions for case-modifying word expansion suppport:
- pos_params_casemod, parameter_brace_casemod; from bash-4.0-devel branch
-
-assoc.c
- - new functions for completeness: assoc_remove_quoted_nulls
- - assoc_patsub now calls assoc_remove_quoted_nulls for "${assoc[*]}"
- - assoc_modcase now calls assoc_remove_quoted_nulls for "${array[*]}"
- - assoc_patsub now handles the mflags&MATCH_QUOTED case appropriately
- (that implies "${assoc[@]}")
-
- 7/1
- ---
-assoc.[ch]
- - new function, assoc_subrange: takes a hash table, converts it to a
- word list, and performs the subrange and indexing on that list
- - new functions for completeness: assoc_dequote, assoc_dequote_escapes
-
-subst.c
- - verify_substring_values now takes the variable SHELL_VAR * as its
- new first argument; changed callers
- - change verify_substring_values to handle associative arrays using the
- number of elements as the upper bound
- - brought in code to do case-modifying word expansions from
- bash-4.0-devel branch, conditional on CASEMOD_EXPANSIONS
-
-input.c
- - if the read(2) in getc_with_restart returns -1/EAGAIN, turn off
- non-blocking mode on the file descriptor and try again. Fixes
- problem reported by Glynn Clements <glynn@clements.plus.com>
-
- 7/2
- ---
-doc/{bash.1,bashref.texi}
- - documented new case-modifying word expansions
-
-make_cmd.c
- - change make_here_document to display a warning message including the
- start line of a here document if it ends up delimited by EOF.
- Addresses issue raised by Richard Neill <rn214@hermes.cam.ac.uk>
-
-subst.c
- - in do_assignment_internal, make sure the `invisible' attribute is
- unset before returning success
-
- 7/3
- ---
-config-top.h
- - add `CASEMOD_CAPCASE' define to include or exclude the ~[~] word
- expansion and the `capcase' variable attribute (declare -c)
-
-builtins/declare.def
- - add support for manipulating the case-modifying attributes (new
- declare -clu); from bash-4.0-devel branch
-
-builtins/setattr.def
- - add support for reporting case-modifying attributes (-clu attributes);
- from bash-4.0-devel branch
-
-doc/{bash.1,bashref.texi}
- - specify that the read builtin timing out results in a return value
- greater than 128
- - document new `-l' and `-u' options to declare/typeset/local. Leave
- `-c' undocumented for now
-
- 7/4
- ---
-make_cmd.[ch]
- - make_coproc_command: construct a coproc; from bash-4.0-devel tree
-
-dispose_cmd.c
- - dispose coproc command; from bash-4.0-devel tree
-
-copy_cmd.c
- - copy a coproc command; from bash-4.0-devel tree
-
-print_cmd.c
- - print a coproc command; from bash-4.0-devel tree
-
-shell.c
- - dispoe the current coproc on shell exit; from bash-4.0-devel tree
-
-redir.c
- - when closing redirects as part of user redirections, check whether
- or not active coprocess fds are being closed and close the coproc
- if so; from bash-4.0-devel tree
-
-config.h.in
- - add define for COPROCESS_SUPPORT to include coprocesses
-
-configure.in
- - add support for configuring coprocesses into and out of the build
-
-jobs.c
- - in waitchld, check whether or not a coproc processs has exited;
- from the bash-4.0-devel tree
-
- 7/5
- ---
-doc/bashref.texi
- - document new --enable-coprocesses option that includes coprocess
- support
-
-execute_cmd.c
- - add functions for coprocess support, including execute_coproc and
- code to call it when command->type == cm_coproc; from
- bash-4.0-devel tree
-
-lib/sh/fdprintf.c
- - new library function fdprintf(int fd, const char *format, ...);
- printf to a file descriptor
-
-{configure,config.h}.in
- - support for detecting fdprintf and compiling in replacement
-
-Makefile.in,lib/sh/Makefile.in
- - add rules to include fdprintf.o
-
-doc/{bash.1,bashref.texi}
- - documented coprocesses and `coproc' reserved word
-
- 7/7
- ---
-subst.c
- - fix array_length_reference to use MB_STRLEN instead of STRLEN, so
- multibyte characters in array values are computed correctly. Fixes
- bug reported by Wang Xin <wxinee@gmail.com>
-
- 7/10
- ----
-jobs.c
- - new function, maybe_give_terminal_to (old, new, flags), sets the
- terminal pgrp to NEW if and only if it's currently set to OLD
- - call maybe_give_terminal_to when the parent sets the terminal pgrp
- to the pipeline pgrp in stop_pipeline, so we don't give the
- terminal to the new job's pgrp unless it's currently owned by the
- shell. Fixes race condition described by Joe Peterson
- <joe@skyrush.com>, where parent bash may change tty pgrp after a
- grandchild (interactive bash child of su) has changed it to
- something else. The call to maybe_give_terminal_to makes explicit
- a previously-implicit assumption
-
-aclocal.m4
- - remove dependency on writable /tmp by creating directories in
- build directory
-
-shell.c
- - make changes to how bash sets no_line_editing and running_under_emacs
- to deal with various emacs terminal emulators; use better check
- for `eterm', since bash sends $PWD to eterm with control sequences
- that confuse other programs. Problem reported by Micah Cowan
- <micah@cowan.name>
-
-
- 7/12
- ----
-print_cmd.c
- - break code that prints here-documents into two functions:
- print_heredoc_header, which prints the operator and delimiter, and
- print_heredoc_body, which prints the body text and closing delimiter
- - change print_redirection to call print_heredoc_{header,body}
- - sentinel variable, printing_connection, used when printing a command
- of type `connection' (|, &&, ||, etc.)
- - change print_redirection_list to save any here documents it finds
- while printing a connection and save them in `deferred_heredocs'
- - new function, print_deferred_heredocs, called from print_redirection
- in the cm_connection case, calls print_heredoc_header for all the
- here documents, then prints the operator (|, &&, ||, etc.), then
- the here-document body. This preserves syntactic correctness; the
- old code printed the control operator after the body of the here
- document. Fixes bug reported by <buport@figpost.com>
-
- 7/16
- ----
-locale.c
- - in set_locale_var, print a warning message if setlocale() fails any
- time it's called -- required some code restructuring
-
- 7/19
- ----
-support/shobj-conf
- - support for mingw32, contributed by Carlo Bramix
- <carlo.bramix@libero.it>
-
- 7/23
- ----
-execute_cmd.c
- - added support (currently unused) to manage a list of coprocs
-
- 7/25
- ----
-bashline.c
- - add extern declarations for literal_history and force_append_history
-
-builtins/shopt.def
- - include "bashhist.h" instead of having extern declarations for the
- appropriate history variables
-
-parser.h
- - new parser_state value: PST_HEREDOC, set when reading body of here-
- document in parse.y:read_secondary_line
-
-parse.y
- - set PST_HEREDOC bit in parser_state when reading a secondary line
- for the body of a here-document
- - change read_secondary_line to save lines in the body of a here-
- document in the shell history list if remember_on_history is
- set. Fixes bug reported by Gene Golub <gene_golub@hotmail.com>
-
- 8/4
- ---
-configure.in
- - changed to 4.0-alpha
-
-lib/readline/readline.h
- - changed constants to reflect readline-6.0 version
-
- 8/11
- ----
-lib/readline/signals.c
- - make sure we don't use SIGWINCH without checking whether or not it's
- defined. Fix from Pedro Alves <pedro@codesourcery.com>
-
- 8/12
- ----
-
-COPYING
- - updated to GPLv3; edits in every file with a copyright or license
- declaration to update to gpl3
-
-version.c
- - update extended version info to latest gnu standard
-
- 8/17
- ----
-subst.c
- - change exp_jump_to_top_level to only call top_level_cleanup if
- parse_and_execute_level is 0. If it's not, the longjmp to
- parse_and_execute will run the unwind-protect stack. Fixes bug
- most recently reported by Roman Rakus <rrakus@redhat.com>
-
- 8/18
- ----
-support/config.{guess,sub}
- - updated to newer versions from autoconf-2.62 distribution
-
- 8/20
- ----
-subst.c
- - fixed parameter_brace_substring to differentiate between indexed and
- associative arrays when computing second offset, instead of
- assuming indexed array
-
- 8/21
- ----
-support/xcase.c
- - simple program to convert input from lower to uppercase and vice
- versa. Now used by coproc test suite, since `tr -u' is not
- portable.
-
- 8/22
- ----
-doc/bash.1
- - fixed description of the bindable edit-and-execute commands to note
- they check $VISUAL first, instead of $FCEDIT. Fixed bug reported
- by
-
-[bash-4.0-alpha frozen]
-
- 8/28
- ----
-[bash-4.0-alpha released]
-
- 9/1
- ---
-builtins/evalstring.c
- - fixed typo in parse_string (ostring used uninitialized). Bug
- reported by Andreas Schwab <schwab@suse.de>
-
-subst.c
- - fix return value of parameter_brace_expand to set the
- W_HASQUOTEDNULL flag in the returned WORD_DESC * if the return value
- from parameter_brace_remove_pattern is a quoted null string. Fixes
- bug reported by Andreas Schwab <schwab@suse.de>
- - set the W_HASQUOTEDNULL flag in the return value from
- parameter_brace_expand if the return value from parameter_brace_patsub
- is a quoted null string
-
- 9/6
- ---
-builtins/read.def
- - change read -t 0 to return success if there is input available to be
- read -- allows scripts to poll for input. Uses input_avail libsh
- function
-
- 9/9
- ---
-externs.h
- - fix extern fpurge declaration -- use HAVE_DECL_FPURGE instead of
- NEED_FPURGE_DECL, since the former is set by `configure'
-
-jobs.h
- - add extern declaration for close_pgrp_pipe
- - add a new job state JNONE (-1) to the enum
-
-jobs.c
- - include execute_cmd.h for extern declarations for coproc functions
-
-subst.c
- - include builtins/builtext.h for extern declarations for functions
- implementing builtins (e.g., declare_builtin)
-
-arrayfunc.c
- - include "pathexp.h" for extern declaration for glob_char_p
-
-braces.c
- - add extern declaration for `asprintf'
-
-lib/readline/rlprivate.h
- - add extern declarations for _rl_trace, _rl_tropen
-
-lib/sh/zgetline.c
- - add extern declarations for zread, zreadc
-
-lib/sh/mktime.c
- - include "bashansi.h" for string function declarations
-
-builtins/common.h
- - add extern declaration for parse_string
-
-trap.c
- - include jobs.h for extern declaration for run_sigchld_trap
-
-general.c
- - fix call to strtoimax in legal_number; if ep == string when function
- returns, the number was not converted, even if errno is not set.
- Fix from Paul Jarc <prj@case.edu>
-
- 9/11
- ----
-[prayers for the victims of 9/11/2001]
-
-builtins/return.def
- - call no_options, as Posix requires. This also has the effect of
- disallowing negative return values unless they're prefixed by `--'
-
- 9/13
- ----
-builtins/bind.def
- - add an error message when bind is used without line editing active,
- instead of just returning an error status
-
-variables.c
- - make sure make_local_variable never creates visible variables with
- a value, whether or not a variable with the same name existed in a
- previous context. This is consistent with ksh93. Fix from
- <neil@s-z.org>
-
- 9/16
- ----
-execute_cmd.c
- - add call to CHECK_TERMSIG in shell_execve after the call to execve
- returns. Recommended by Roman Rakus <rrakus@redhat.com>
- - add QUIT check in execute_connection after executing first command
- in a `&' connection
-
- 9/22
- ----
-execute_cmd.c
- - new semaphore variable, executing_list, incremented every time a
- list (command1;command2 or command1 || command2 or command1 &&
- command2) is executed; used as sentinel for rest of shell
-
-sig.c,builtins/evalstring.c
- - set executing_list to 0 when throwing execution back to top level;
- make sure to unwind-protect it in appropriate places
-
-jobs.c
- - if a pipeline is killed by SIGINT while executing a list (when
- executing_list is non-zero), make sure the shell acts as if an
- interrupt occurred. The behavior is dependent on the shell
- compatibility level being > 32 (bash-4.0 and above)
-
- 9/23
- ----
-redir.c
- - don't bother reporting an error with a file descriptor, even if
- the errno is EBADF, if the redirection error (e.g., NOCLOBBER)
- can't have anything to do with the fd. Fixes bug reported by
- "David A. Harding" <dave@dtrt.org>, debian bug #499633.
-
- 9/24
- ----
-builtins/declare.def
- - make `declare [option] var' (and the `typeset' equivalent) create
- invisible variables, instead of assigning the null string to a
- visible variable. Fixes bug reported by Bernd Eggink <monoped@sudrala.de>
-
- 9/25
- ----
-builtins/common.[ch]
- - new function, builtin_warning(), like builtin_error but for warning
- messages
-
-builtins/bind.def
- - experimental: print a warning, but go on, if line editing not active
- when bind is invoked. Suggested by Rocky Bernstein
- <rocky.bernstein@gmail.com>
-
- 10/3
- ----
-test.c
- - use same_file instead of directly comparing st_dev and st_ino when
- comparing files in filecomp(). From mingw32 patches submitted
- by Hector Chu <hkcc2@cantab.net>
-
- 10/4
- ----
-
-redir.c
- - in redirection_error(), use `error' instead of errno when comparing
- against EBADF. From mingw32 patches submitted by Hector Chu
- <hkcc2@cantab.net>
-
-shell.c
- - in unset_bash_input(), reset bash_input.type to st_none after
- closing the default buffered fd. From mingw32 patches submitted
- by Hector Chu <hkcc2@cantab.net>
-
-builtins/cd.def
- - ignore CDPATH when in privileged mode. Suggested by Paul Jarc
- <prj@po.cwru.edu>
-
-variables.c
- - change sv_globignore to only act if privileged mode is not enabled.
- Suggested by Paul Jarc <prj@po.cwru.edu>
-
-doc/bash.1,bashref.texi
- - document new treatment of CDPATH and GLOBIGNORE when privileged
- mode is enabled
-
-builtins/read.def
- - change prompt printing to occur after terminal is set to no-echo
- mode. Based on suggestion from Stephane Chazelas
- <stephane_chazelas@yahoo.fr>
-
-lib/readline/signals.c
- - new variables to keep track of special characters corresponding to
- SIGINT, SIGQUIT, and SIGTSTP
- - new variable to keep track of whether tty is echoing control
- characters corresponding to SIGINT, SIGQUIT, and SIGTSTP
- - new function, _rl_echo_signal_char(int sig) to display the tty
- special char generating SIGINT, SIGQUIT, or SIGTSTP. Based on
- idea and code from Joe Peterson <joe@skyrush.com>
- - call rl_echo_signal_char in rl_signal_handler: if the terminal
- settings indicate it, readline will echo characters that generate
- keyboard signals
-
-lib/readline/rltty.c
- - set _rl_intr_char, _rl_quit_char, and _rl_susp_char to special
- characters that generate signals from keyboard
- - set _rl_echoctl if ECHOCTL tty flag is set
-
-lib/readline/rlprivate.h
- - extern declarations for _rl_intr_char, _rl_quit_char, and
- _rl_susp_char
- - extern declaration for _rl_echoctl
-
-lib/readline/readline.h
- - extern declaration for rl_echo_signal_char()
-
-lib/readline/doc/rltech.texi
- - document rl_echo_signal_handler(): available for applications
- that install their own signal handlers
-
- 10/5
- ----
-execute_cmd.c
- - fix errexit logic to not cause the shell to exit when a command in
- a pipeline fails. Fixes bug reported by Marcin Owsiany
- <marcin@owsiany.pl>
-
- 10/14
- -----
-builtins/evalstring.c
- - don't short-circuit execution in parse_and_execute if we want to
- run an exit trap. Fixes bug reported by Steffen Kiess
- <s-kiess@web.de>
-
- 10/18
- -----
-parse.y
- - fix error production to only call YYACCEPT if the shell is currently
- interactive and not in parse_and_execute (so parser errors in
- things like eval will correctly set $?). Fixes bug reported by
- marco-oweber@gmx.de
-
-execute_cmd.c
- - make sure variable name errors in execute_for_command and non-
- identifier function names in execute_intern_function set the
- return status to EX_BADUSAGE (2), not EX_USAGE (258)
-
-parser.h
- - new parser state, PST_REPARSE
-
-parse.y
- - turn PST_REPARSE on in parse_string_to_word_list
- - in parse_matched_pair, if parsing a single-quoted string and
- PST_REPARSE is set, don't requote CTLESC or CTLNUL. Fixes bug with
- compound array assignment using $'\x7f' reported by Antonio Macchi
- <antonio_macchi@alice.it>
-
- 10/23
- -----
-configure.in
- - define LOCAL_LDFLAGS as `-z interpose' on Solaris 8, 9, and 10 to
- allow the bash malloc to interpose the libc malloc when called by
- library functions pre-bound to the libc malloc. Suggested by
- Serge Dussud <Serge.Dussud@Sun.COM>
-
- 10/26
- -----
-doc/bash.1
- - add single-sentence descriptions to rest of parameter expansions.
- Suggested by Ken Irving <fnkci@uaf.edu>
-
- 10/27
- -----
-subst.c
- - rearrange code in skip_to_delims to allow quote characters and other
- shell expansion characters to be delimiters
- - add new flags value for inverting search: skip to the next character
- NOT in the set of delimiters passed as an argument
-
-subst.h
- - define for new SD_INVERT flag value for skip_to_delims
-
- 10/28
- -----
-bashline.c
- - new bindable functions: shell-forward-word and shell-backward-word.
- Like forward-word and backward-word, but understand shell quoting
- and use shell metacharacters and whitespace as delimiters.
- Suggested by Andre Majorel <amajorel@teaser.fr>
- - new bindable functions: shell-kill-word and shell-backward-kill-word.
- Like kill-word and backward-kill-word, but understand shell quoting
- and use shell metacharacters and whitespace as delimiters.
- Suggested by Andre Majorel <amajorel@teaser.fr>
-
-doc/bash.1,lib/readline/doc/rluser.texi
- - documented shell-forward-word and shell-backward-word
- - documented shell-kill-word and shell-backward-kill-word
-
- 11/1
- ----
-redir.c
- - add extra argument to add_undo_redirect: fdbase. FD used to save
- a file descriptor must be > fdbase if fdbase >= SHELL_FD_BASE. A
- value of -1 for fdbase means to just use SHELL_FD_BASE. Fixes bug
- with 0<&10 reported by Clark Jian Wang <dearvoid@gmail.com>
-
- 11/5
- ----
-unwind_prot.c
- - new function: have_unwind_protects(); returns 1 if unwind_protect_list
- is not empty
-
-unwind_prot.h
- - extern declaration for have_unwind_protects
-
-builtins/evalstring.c
- - in parse_and_execute_cleanup, make sure that we don't call
- run_unwind_frame and expect it to decrement parse_and_execute_level
- if there's no unwind_protect_list, since there's a while loop in
- throw_to_top_level that calls parse_and_execute_cleanup as long as
- parse_and_execute_level is non-zero
-
- 11/9
- ----
-variables.c
- - fix the assign function for COMP_WORDBREAKS to allocate new memory
- to store as the variable's value, to avoid freeing memory twice
- if the variable is unset after rl_completer_word_break_characters
- is freed and reallocated. Fix from Mike Stroyan <mike@stroyan.net
-
- 11/11
- -----
-bashline.c
- - new function to reset the value of rl_completer_word_break_characters
- while honoring setting of `hostcomplete': reset_completer_word_break_chars.
-
-bashline.h
- - new extern declaration for reset_completer_word_break_chars.
-
-variables.c
- - call reset_completer_word_break_chars in sv_comp_wordbreaks when the
- variable is unset
-
-[bash-4.0-beta frozen]
-
- 11/16
- -----
-subst.c
- - call set_pipestatus_from_exit in exp_jump_to_top_level so that
- failed expansions that set $? will set $PIPESTATUS. Fixes bug
- reported by Eric Blake <ebb9@byu.net>
-
- 11/20
- -----
-general.c
- - new 'file_exists(fn)' primitive; just calls stat(2)
-
-general.h
- - new extern declaration for file_exists
-
-bashline.c
- - add `~' to rl_filename_quote_characters so make_quoted_replacement
- will call bash_quote_filename for words containing `~'. Then
- bash_quote_filename can make choices based on that
- - change quote_word_break_chars to backslash-quote the tilde in a
- filename with a leading tilde that exists in the current directory,
- since we want to inhibit tilde expansion in this case
-
-execute_cmd.c
- - call file_isdir from shell_execve instead of stat(2) directly
-
-bashhist.c
- - use file_exists and file_isdir primitives instead of calling stat
-
- 11/21
- -----
-redir.c
- - When undoing saving of non-standard file descriptors (>=3) using
- file descriptors >= SHELL_FD_BASE, we set the saving fd to be
- close-on-exec and use a flag (RX_SAVCLEXEC) to decide how to set
- close-on-exec when the fd is restored. Set flag in add_undo_redirect,
- check in do_redirection_internal. Fixes problem reported by Andreas
- Schwab <schwab@suse.de>
-
- 11/26
- -----
-subst.c
- - fix param_expand to have expansions of $@ and $* exit the shell if
- there are no positional parameters and `set -u' is enabled. Fixes
- bug reported by Dan Jacobson <jidanni@jidanni.org>
-
- 11/27
- -----
-lib/readline/display.c
- - fix update_line to not call space_to_eol if current cursor position
- (_rl_last_c_pos) indicates that we're already at end of line.
- Partial fix for bug reported by Mike Frysinger <vapier@gentoo.org>
- - in update_line, don't call insert_some_chars if that will start
- before the last invisible character in the prompt string and not
- draw the entire prompt string. More of the partial fix for bug
- reported by Mike Frysinger <vapier@gentoo.org>
- - fix update_line to adjust _rl_last_c_pos by wrap_offset when adding
- characters beginning before the last invisible character in the
- prompt. New code is same as previously existed in a different code
- path. Rest of fix for bug from Mike Frysinger <vapier@gentoo.org>
- - fix assignment of newline breaks (inv_lbreaks) to correctly account
- for prompts longer than two screen lines containing invisible
- characters. The assumption is that part of the invisible characters
- are on the first line (prompt_invis_chars_first_line) and the
- remainder are on the last (wrap_offset - prompt_invis_chars_first_line).
- Fix is in rl_redisplay. part of fix for bug reported by
- "Wesley J. Landaker" <wjl@icecavern.net> in
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=265182
- [TENTATIVE]
- - fix _rl_move_cursor_relative to correctly offset `dpos' by `woff'
- when there are invisible characters on lines after the second by
- using (_rl_screenwidth*_rl_last_v_pos) when seeing whether or not
- we just wrote some invisible characters. Rest of fix for bug
- reported in http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=265182
- [TENTATIVE]
-
- 12/11
- -----
-sig.c
- - reset the execution context before running the exit trap in
- termsig_handler
-
-general.c
- - set and unset terminate_immediately like interrupt_immediately in
- bash_tilde_expand
-
-builtins/read.def
- - change terminate_immediately to a counter instead of a flag, as
- interrupt_immediately is used
-
-lib/readline/display.c
- - slight change to fix from 11/27 to deal with prompts longer than a
- screen line where the invisible characters all appear after the
- line wrap. Fixes bug reported by Andreas Schwab <schwab@suse.de>
-
-builtins/{echo,printf}.def
- - increment terminate_immediately at entry; decrement before returning.
- Fix for bug reported by Ralf.Wildenhues@gmx.de
-
- 12/16
- -----
-subst.c
- - fix off-by-one error in /dev/fd version of add_fifo_list; make
- sure we add to totfds when it is == fd, not just when fd > totfds.
- Fixes bug reported by marciso@gmail.com
-
-[bash-4.0-beta2 frozen]
-
- 12/29
- -----
-doc/{bash.1,bashref.texi}
- - document more clearly that when not in Posix mode, command
- substitution does not inherit the -e option. From bug report from
- Freddy Vulto <fvulto@gmail.com>
-
-{execute_cmd,sig,builtins/evalstring}.c
- - sentinel variable to keep track of whether or not we're supposed to
- ignore the failure status of a command executed in a command
- substitution even if the `-e' option is set: comsub_ignore_return
- - increment and decrement comsub_ignore_return in execute_simple_command
- before calling expand_words
- - in parse_and_execute, if comsub_ignore_return is non-zero and the
- SUBSHELL_COMSUB bit is set in subshell_environment, enable the
- CMD_IGNORE_RETURN flag in every command executed from the passed
- string. Fixes problem reported by Freddy Vulto <fvulto@gmail.com>
- - make sure to reset comsub_ignore_return every time we throw to the
- top level, like executing_list flag
-
- 1/2/2009
- --------
-parse.y
- - fix to rewind_input_stream to handle case of $(...) command
- substitution followed by a quoted literal newline. Report and fix
- from Andreas Schwab <schwab@suse.de>
-
- 1/7
- ---
-
-subst.c
- - fix match_wpattern and match_upattern to prefix a `*' to the
- pattern even if it starts with a `*(' (if extglob is enabled)
- before checking whether or not it can match anywhere in the
- string. Fixes bug reported by os@sernet.de.
-
-[bash-4.0-rc1 frozen]
-
- 1/9
- ---
-locale.c
- - since setlocale() doesn't set errno to anything meaningful,
- don't include the strerror() result in the error message if
- it fails
- - make sure the error messages printed when setlocale fails are
- localizable
-
- 1/11
- ----
-lib/readline/histexpand.c
- - make sure that every time history_no_expand_chars is tested, we
- also call the history_inhibit_expansion_function if it's set.
- Fixes bug reported by Yang Zhang <yanghatespam@gmail.com>
-
- 1/12
- ----
-trap.c
- - make sure to call parse_and_execute with the SEVAL_RESETLINE bit
- set in the flags so it will reset the line number when running
- the trap commands. Partial fix for bug reported by
- peter360@fastmail.us
-
- 1/14
- ----
-builtins/reserved.def
- - document `coproc' so it can be used with `help' builtin. Pointed
- out by Pierre Gaston <pgas@freeshell.org>
-
-lib/sh/casemod.c
- - added two new flags: CASE_UPFIRST and CASE_LOWFIRST to casemod
- the first character of the passed string and pass the rest
- through unchanged. Fixes bug reported by Jan Schampera
- <jan.schampera@web.de>
-
-externs.h
- - new defines for CASE_UPFIRST and CASE_LOWFIRST
-
-subst.c
- - use CASE_UPFIRST for ^ and CASE_LOWFIRST for , casemod operators
-
-builtins/mapfile.def
- - call zreset() before calling first zgetline(), to clean out any
- remaining data in local buffer used by zreadc. Fixes bug
- reported by Pierre Gaston <pierre.gaston@gmail.com>
-
- 1/15
- ----
-lib/sh/zread.c
- - renamed zreadintr to zreadretry -- not perfect, but better
- - new functions: zreadintr, which just calls read so it can be
- interruptible, and zreadcintr, which is like zreadc but uses
- zreadintr to fill the buffer
-
-lib/sh/zgetline.c
- - in zgetline, when zread/zreadc return <= 0, make sure line is
- non-null before assigning to line[nr]
-
-builtins/mapfile.def
- - return an error right away if the supplied array variable name
- refers to a readonly or noassign array
- - set interrupt_immediately so calls to zgetline can be
- interrupted. Fixes bug reported by Pierre Gaston
- <pierre.gaston@gmail.com>
- - if interactive, pass the SEVAL_INTERACT and SEVAL_NOHIST flags
- to parse_and_execute when calling callbacks. Fixes bug reported
- by Pierre Gaston <pierre.gaston@gmail.com>
- - add `readarray' as a synonym for mapfile
-
-doc/{bash.1,bashref.texi}
- - document behavior of mapfile builtin adding index of array element
- to be assigned as additional argument to callback string. Reported
- by Pierre Gaston <pierre.gaston@gmail.com>
- - document readarray as synonym for mapfile
-
-builtins/common.c
- - new error function, sh_ttyerror(set), prints an error message having
- to do with setting or getting terminal attributes
-
-builtins/read.def
- - print error message if read fails to set terminal attributes
-
- 1/16
- ----
-execute_cmd.c
- - new function, coproc_reap, calls coproc_dispose if sh_coproc is
- marked as COPROC_DEAD
- - new function, cpl_reap, disposes coprocs marked as COPROC_DEAD
- from coproc list
- - change coproc_pidchk to just mark the coproc as dead instead of
- calling coproc_dispose, so we don't call unsafe functions from
- a signal handler. Fixes bug reported by Andreas Schwab
- <schwab@suse.de>
-
-execute_cmd.h
- - new extern declaration for coproc_reap
-
-command.h
- - new flags for c_flags member of a struct coproc
-
-{jobs,nojobs}.c
- - add call to coproc_reap in cleanup_dead_jobs, which will do the
- right queueing or blocking of SIGCHLD
-
-trap.c
- - modify change from 1/12 to not reset the line number when running
- the DEBUG and RETURN traps
-
- 1/18
- ----
-lib/sh/casemod.c
- - change default operations to work on entire passed string instead
- of breaking into words at non-alpha-numerics. Use new
- CASE_USEWORDS flag to enable by-word behavior. Fixes bug reported
- by Jan Schampera <jan.schampera@web.de>
-
-builtins/printf.def
- - in vbprintf, bracket each call to vsnprintf (which uses the args
- passed to vbprintf) with SH_VA_START and va_end, so we can
- reninitialize the argument list for each call. This is actually
- what the C standard requires. Fixes bug that caused printf -b
- to `ignore' first % format specifier if it came first in the
- string. Reported by David Leverton <levertond@googlemail.com>
-
-builtins/mapfile.def
- - start the line count at 1, since it doesn't get incremented before
- (or after) reading the first line, so things like
- `mapfile -n 5 -c 1 -C 'echo foo' array < file' work right and call
- the callback after the first line is read. Fixes bug reported by
- Pierre Gaston <pierre.gaston@gmail.com>
-
- 1/22
- ----
-lib/readline/complete.c
- - set _rl_interrupt_immediately non-zero before reading from the file
- system or calling an application-defined completion function
-
-lib/readline/signals.c
- - renamed rl_signal_handler to _rl_handle_signal; new version of
- rl_signal_handler that just calls _rl_handle_signal (for now)
- - new function _rl_signal_handler that calls _rl_handle_signal without
- any checking
-
-lib/readline/rlprivate.h
- - new extern declaration for _rl_signal_handler
- - new define, RL_CHECK_SIGNALS, checks whether or not _rl_caught_signal
- is set and calls _rl_signal_handler if so
-
-lib/readline/{bind,input,readline}.c
- - add RL_CHECK_SIGNALS in appropriate places
-
-lib/readline/signals.c
- - change rl_signal_handler to set a flag and return rather than
- run through the entire signal handling process. If
- _rl_interrupt_immediately is set, call the signal handling code
- right away instead of setting the flag. Initial fix for crash
- bug reported by Roman Rakus <rrakus@redhat.com>
-
-aclocal.m4
- - new macro, BASH_TYPE_SIG_ATOMIC_T, tests for sig_atomic_t in
- <signal.h>, defines as int if not defined
-
-configure.in
- - call BASH_TYPE_SIG_ATOMIC_T
- - call AC_C_VOLATILE
-
-config.h.in
- - empty define for sig_atomic_t
- - empty define for volatile
-
- 1/27
- ----
-subst.c
- - audit calls to add_character and change to add_ifs_character (which
- quotes characters in $IFS). Affects primarily `:', `=', and `~'.
- Fixes bug reported by Jan Schampera <jan.schampera@web.de>; fix
- suggested by Stephane Chazelas <stephane_chazelas@yahoo.fr>
-
- 2/1
- ---
-configure.in
- - call AC_C_RESTRICT
-
-config.h.in
- - add empty defintion for `restrict'
-
-pcomplete.c
- - use unwind_protects around call to execute_shell_function in
- gen_shell_function_matches to prevent data corruption if
- throw_to_top_level is called. Bug report and fix from
- werner@suse.de.
-
-execute_cmd.c
- - don't clamp CPU usage at 100% in print_formatted_time. Bug reported
- by Linda Walsh <bash@tlinx.org>
-
- 2/5
- ---
-locale.c
- - in set_locale_var, set errno to 0 before calling setlocale(), and
- print strerror (errno) if setlocale fails and errno ends up non-zero
-
- 2/6
- ---
-configure.in
- - backed out of solaris change from 10/23/2008 (adding `-z interpose'
- to LDFLAGS) due to solaris updates to fix a linker problem.
- Updatted by Serge Dussud <Serge.Dussud@Sun.COM>
-
- 2/12
- ----
-execute_cmd.c
- - change execute_connection so failure of a pipeline will cause the
- shell to exit if -e is on. From discussion on austin-group
- mailing list
- - change execute_command_internal so failure of a user-specified
- subshell will cause the shell to exit if -e is on. From discussion
- on austin-group mailing list
-
- 2/13
- ----
-doc/{bash.1,bashref.texi}
- - clarified description of set -e option to accurately reflect current
- implementation
-
- 2/19
- ----
-print_cmd.c
- - fix print_deferred_heredocs to not print a space if the separator
- string is null
- - change print_deferred_heredocs to set `was_heredoc' after printing
- something
- - change connection printing code to only print the `;' separator
- if we haven't just printed a here-document
- - change connection printing code to print any deferred here
- documents after the rhs of the connection. Fixes bug reported by
- Bo Andresen <bo.andresen@zlin.dk>
-
-[bash-4.0 frozen]
-
- 2/20
- ----
-
-[bash-4.0 released]
-
- 2/22
- ----
-
-parse.y
- - fix parse_comsub to not test a character for being a possible shell
- metacharacter if LEX_PASSNEXT flag is set. Fixes bug reported by
- Mike Frysinger <vapier@gentoo.org>
-
-pcomplete.c
- - add call to save_parser_state (accidentally dropped from patch) to
- gen_shell_function_matches. Fixes bug with bash_completion and
- file/directory completion reported by phil@Arcturus.universe
-
-Makefile.in
- - fix assignment to LDFLAGS_FOR_BUILD to match those in subdir
- Makefiles. Fixes bug reported by Mike Frysinger <vapier@gentoo.org>
-
-builtins/mapfile.def
- - make sure the callback quantum (-c option argument) is > 0. Fixes
- bug reported by Stephane Chazleas <stephane_chazelas@yahoo.fr>
-
- 2/23
- ----
-parse.y
- - fix save_token_state and restore_token_state to save and restore
- current_token. Fixes bug reported by Bernd Eggink
- <monoped@sudrala.de>
-
-builtins/exit.def
- - check jobs[i] before checking whether or not it's running when
- the checkjobs option is set and we're looking for running jobs
- at exit. Fixes bug reported by Mike Frysinger <vapier@gentoo.org>
-
- 2/24
- ----
-siglist.c
- - include bashintl.h for definition of _. Fixes bug reported by
- Greg Wooledge <wooledg@eeg.ccf.org>
-
- 2/25
- ----
-subst.c
- - new function, skip_matched_pair. Similar to skip_to_delim and
- the extract_XXX family
- - move skipsubscript here from arrayfunc.c; re-implement in terms of
- skip_matched_pair. Fixes bugs reported by <anmaster@tele2.se>
-
-arrayfunc.c
- - remove skipsubscript; moved to subst.c
-
-parse.y
- - change reset_parser to set current_token to '\n'. Rest of fix for
- bug reported by Bernd Eggink <monoped@sudrala.de>; earlier fix on
- 2/23
-
- 2/26
- ----
-builtins/declare.def
- - when given something like array[x]=y (which sets making_array_special
- to 1), don't convert an associative array to an indexed array (line
- 493). Part of fix for bug reported by Pierre Gaston
- <pierre.gaston@gmail.com>
- - if offset == 0, indicating that we do not have a valid assignment,
- make sure any `name' containing a `[' is a valid array reference
- before trying to go on. Not doing this leads to creating crazy
- variables like `name[foo[bar]=bax'. Rest of fix for bug reported
- by Pierre Gaston <pierre.gaston@gmail.com>
-
-assoc.c
- - change assoc_to_assign to single-quote the array keys if `quoted' is
- non-zero. Makes things easier to read with weird characters in the
- key
-
-parse.y
- - fix parse_comsub to not set LEX_HEREDELIM when it sees "<<<". Fixes
- bug reported by Mike Frysinger <vapier@gentoo.org>
-
- 2/27
- ----
-parse.y
- - fix report_syntax_error to set last_command_exit_value to
- EX_BADUSAGE (2) instead of EX_USAGE (258), since there's nothing
- that will translate that to something < 128 before reading the
- next command. Partial fix for bug reported by Mike Frysinger
- <vapier@gentoo.org>
-
-sig.c
- - fix sigint_sighandler to set last_command_exit_value to sig+128
- before calling throw_to_top_level. Rest of fix for bug reported
- by Mike Frysinger <vapier@gentoo.org>
-
-jobs.c
- - if fork() fails, set last_command_exit_value to 126 before calling
- throw_to_top_level
-
-execute_cmd.c
- - defer calling unlink_fifo_list in parent branch of
- execute_disk_command if we're executing in a shell function
- - change execute_function to call unlink_fifo_list before returning
- if it's the top-level function
-
- 3/2
- ---
-builtins/read.def
- - if read times out, make sure we remove the top element from the
- unwind-protect stack (the free of input_string) and run the rest,
- to reset the tty and readline and alarm states. Then we jump to
- assigning the variables to any partial input. Fixes bug reported
- by Christopher F. A. Johnson <cfajohnson@gmail.com>
-
- 3/3
- ---
-parse.y
- - break comment checking code into a common COMMENT_BEGIN define so
- we can use it in multiple places in parse_comsub
- - in parse_comsub, don't alter the LEX_RESWDOK flag if we read a
- `#' and we're checking comments, even though `#' isn't a `shell break'
- character. Fixes bug reported by Mike Frysinger <vapier@gentoo.org>
-
-braces.c
- - in expand_seqterm, decrease the total length of the rhs by the length
- of any (optional) increment, so we don't end up with unwanted zero
- padding because the rhs length is wrong. Fixes bug reported by
- Carl Albing <albing@comcast.net>
-
- 3/4
- ---
-doc/{bash.1,bashref.texi}
- - changes to clean up some of the language describing the effects of
- terminal process groups on the ability to read from and write to
- the terminal
-
- 3/5
- ---
-support/shobj-conf
- - add host_vendor to string tested in switch to handle things like
- gentoo/freebsd
- - beginning with version 7, FreeBSD no longer has /usr/bin/objformat
- or a.out binaries and libraries. It's always ELF. Fix from
- Timothy Redaelli <drizzt@gentoo.org>
-
-parse.y
- - in parse_comsub, allow comments if we are ready to read a
- reserved word (tflags & LEX_RESWDOK), haven't read anything from
- one yet (lex_rwlen == 0) and the current character is a '#'
-
- 3/6
- ---
-parse.y
- - new lex flag for parse_comsub: LEX_INWORD. Turn it off when
- we see a shell break character; turn it on or keep it on when
- not a break character. Keep track of word length (reset to 0
- when we turn on LEX_INWORD when it was off).
- - don't use COMMENT_BEGIN in parse_comsub any more; test
- whether or not LEX_INWORD is set and lex_wlen == 0 in addition
- to tests for LEX_RESWDOK and lex_rwlen. Comments are valid
- when at the start of a word
- - move LEX_PASSNEXT code to the top of parse_comsub, so the rest
- of the function doesn't have to check for the flag at different
- places
-
- 3/7
- ---
-parse.y
- - in parse_comsub, when looking for a reserved word (LEX_RESWDOK
- non-zero), and in a case statement, we can see either an esac
- or a pattern list. We handle an esac separately. We should
- turn off LEX_RESWDOK if we see anything but a newline, since
- we'll be reading a pattern list. Other part of fix for bug
- reported by Mike Frysinger <vapier@gentoo.org> (rest of fix
- on 3/3)
-
- 3/10
- ----
-{.,lib/readline}/doc/fdl.texi
- - updated to FDL version 1.3
-
- 3/11
- ----
-parse.y
- - when using the |& construct with a simple command preceding it, add
- the implicit redirection to the simple command's redirection list,
- since the redirections associated with the command struct are never
- executed. Fixes bug reported by Matt Zyzik <Matt@ice.filescope.com>
-
- 3/14
- ----
-execute_cmd.c
- - in execute_case_command, if ;& is used with no following pattern
- list, make sure we don't reference a NULL pointer. Bug report and
- fix from Clark Jian Wang <dearvoid@gmail.com>
-
-parse.y
- - make parser_state global, so other files can use it
- - command_word_acceptable now returns non-zero if PST_REDIRLIST bit
- set in parser_state, so we accept assignment statements and
- perform alias expansion. Fix for bug reported by Vincent
- Lefevre <vincent@vinc17.org> (2/24/2009)
-
-parser.h
- - add PST_REDIRLIST flag, notes that parser is currently parsing a
- redirection list preceding a simple command
-
-make_cmd.c
- - make_simple_command now turns on PST_REDIRLIST in parser_state when
- creating a new simple command
- - make_simple_command turns off PST_REDIRLIST in parser_state if it
- adds a non-redirection to the command it's building
- - clean_simple_command turns off PST_REDIRLIST to make sure it's off
-
-subst.c
- - new flag for param_expand: PF_IGNUNBOUND, means to not exit if the
- variable is unbound even if `set -u' is enabled
- - change param_expand to not call err_unboundvar if the `pflags'
- argument has the PF_IGNUNBOUND bit set
- - parameter_brace_expand_word now takes an extra `pflags' argument to
- pass down to param_expand; changed callers
- - changed call to parameter_brace_expand_word in parameter_brace_expand
- to add PF_IGNUNBOUND flag so ${@:-foo} doesn't cause the shell to
- exit (but ${@} does) when there are no positional parameters. Fixes
- Debian bug 519165 from Dan Jacobson <jidanni@jidanni.org>
-
-parse.y
- - add code to parse_comsub to allow here-documents within command
- substitutions to be delimited by the closing right paren, with the
- usual warning about here documents delimited by EOF on execution.
- Fixes regression from bash-3.2 noted in Red Hat bugzilla 485664 by
- Ralf Corsepius
-
- 3/15
- ----
-subst.c
- - string_list_dollar_at now checks for Q_PATQUOTE, which getpattern()
- uses to denote Q_DOUBLE_QUOTES (?). Fixes a=abcd echo "${a#$*}"
- when IFS= and args are `a b' as noted by Stephane Chazleas
- <stephane_chazelas@yahoo.fr>
- - param_expand now checks for Q_PATQUOTE and treats it identically
- to Q_DOUBLE_QUOTES when expanding $*
- - expand_word_unsplit now sets W_NOSPLIT in the flags of the word it
- passes to expand_word_internal if $IFS is NULL
- - expand_word_leave_quoted now sets expand_no_split_dollar_star and
- the W_NOSPLIT bit in the word flags before calling
- expand_word_internal if $IFS is NULL, just like expand_word_unsplit.
- It is now virtually identical to expand_word_unsplit. Rest of fix for
- problems reported by Stephane Chazleas <stephane_chazelas@yahoo.fr>
-
- 3/20
- ----
-trap.c
- - in _run_trap_internal, don't pass SEVAL_RESETLINE as flag to
- parse_and_execute if running the ERR trap (further modification
- of change from 1/12)
-
-execute_cmd.c
- - in execute_simple_command, set line_number to line_number_for_err_trap
- before calling run_error_trap. Part of fix for bug reported by
- Brian J. Murrell <brian@interlinx.bc.ca>
- - change other places calling run_error_trap() to set and use
- line_number_for_err_trap
-
- 3/21
- ----
-builtins/fc.def
- - Even though command substitution through parse_and_execute turns
- off remember_on_history, command substitution in a shell when
- set -o history has been enabled (interactive or not) should use it
- in the last_hist calculation as if it were on. Same calculation
- in fc_gethnum and fc_builtin. Fixes bug reported by
- Ian Kelling <smallnow@gmail.com>
-
-sig.c
- - change termsig_sighandler to terminate immediately if it gets called
- twice with the same signal before termsig_handler gets called. This
- fixes the `looping on SIGSEGV' phenomenon reported by Linux users.
-
-parse.y
- - in read_secondary_line, don't try to add NULL lines to the history
- list. Report and patch from Lubomir Rintel <lkundrak@v3.sk>
-
- 3/22
- ----
-sig.c
- - Augment change from 3/21 with explicit check for signals we *don't*
- want this to happen for. Patch from Lubomir Rintel <lkundrak@v3.sk>
-
- 3/28
- ----
-array.c
- - in array_reference, return NULL immediately if the desired index
- is larger than the maximum
- - add cache of last array referenced and last array element referenced;
- use in array_reference to optimize case of sequential access;
- invalidated where necessary in other functions
- - array_rshift needs to set max_index to 0 if the array was empty
- before shifting in the new element 0
- - array_shift needs to use element_index(a->head->prev) to set the
- max_index, not a simple decrement, to deal with sparse arrays
-
- 4/1
- ---
-bashline.c
- - in bash_dequote_filename, return right away after copying the
- backslash if the last character in the string to be expanded
- is a backslash. The old code copied an extra NUL and overwrote
- the bounds checking. Fixes bug reported by Shawn Starr
- https://bugzilla.redhat.com/show_bug.cgi?id=488649
-
- 4/3
- ---
-subst.c
- - in pat_subst.c, make sure to copy one character from the input
- string in the case of a null pattern match, since we substitute
- on the null match and then increment past the current character.
- Not doing this means that each character of the original string
- is replaced because of the null matches. Fixes debian bug
- reported bhy Louis-David Mitterrand <ldm@apartia.fr>
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=522160
-
-lib/sh/winsize.c
- - incorporate contents of readline/rlwinsize.h to get all the various
- system dependencies right when trying to find TIOCGWINSZ. Fixes
- bug reported by Dan Price <dp@eng.sun.com>
-
- 4/6
- ---
-doc/{bash.1,bashref.texi}
- - fix description of conditional `>' and `<' to remove statement that
- the comparison pays attention to the current locale -- it has
- always used strcmp
-
-lib/glob/glob.c
- - fixed a bug in glob_filename that caused glob_dir_to_array to be
- called to prepend a (globbed) directory name onto the results from
- glob_vector, which, if we were globbing `**', glob_vector has
- already done. Effect is to have the directory name(s) on there
- twice. Fixes "dir*/**" bug reported by Matt Zyzik
- <Matt@ice.filescope.com>
-
- 4/8
- ---
-doc/{bash.1,bashref.texi}
- - fix short syntax summary of for command to reflect full bash
- syntax (which is a superset of Posix syntax). Fixes bug reported
- by Reuben Thomas <rrt@sc3d.org>
-
- 4/10
- ----
-{expr,subst}.c
- - make sure last_command_exit_value is set to EXECUTION_FAILURE
- before calling err_unboundvar, in case set -e is enabled and
- the shell exits from there. Fixes bug reported by Freddy
- Vulto <fvulto@gmail.com> and Piotr Zielinski
- <piotr.zielinski@gmail.com>
-
- 4/11
- ----
-jobs.c
- - in restore_pipeline, don't call discard_pipeline with a NULL
- argument
-
-trap.c
- - in run_debug_trap, make sure to save and restore the pipeline,
- pipeline_pgrp, and state of the pipeline around running the debug
- trap, then remove any job created by running the debug trap from
- the jobs table when it completes. Fixes for two bugs reported
- by lex@upc.ua
-
- 4/12
- ----
-lib/readline/signals.c
- - new functions to block and release SIGWINCH like the SIGINT blocking
- and releasing functions
-
-lib/readline/rlprivate.h
- - new extern declarations for _rl_block_sigwinch and _rl_release_sigwinch
-
-lib/readline/display.c
- - block SIGWINCH during redisplay like SIGINT. Should fix bug reported
- by Nicolai Lissner <nlissne@linux01.org>
-
- 4/13
- ----
-lib/readline/readline.h
- - new readline state variable: RL_STATE_REDISPLAYING
-
-lib/readline/display.c
- - in rl_redisplay, don't block SIGWINCH during redisplay; just set
- the REDISPLAYING state
-
-lib/readline/terminal.c
- - in rl_resize_terminal, don't call rl_redisplay_after_sigwinch() if
- we're already in the middle of redisplay (RL_STATE_REDISPLAYING).
- Fix for bug reported by Nicolai Lissner <nlissne@linux01.org>
-
- 4/15
- ----
-parse.y
- - fix parse_comsub to add check for \n when seeing whether the current
- character can change to a state where a reserved word is legal,
- since it is not a shell meta character. Fixes bug reported by
- Bernd Eggink <monoped@sudrala.de>.
-
- 4/17
- ----
-jobs.c
- - new functions to save and restore the pgrp_pipe (since there's only
- one): save_pgrp_pipe and restore_pgrp_pipe
-
-trap.c
- - run_debug_trap now saves and restores the pgrp_pipe before and
- after calling the debug trap
- - run_debug_trap now makes sure the terminal is owned by the pipeline
- pgrp after the debug trap runs. Rest of fix for bug reported by
- Oleksly Melnyk <o.melnyk@upc.ua> (lex@upc.ca)
-
- 4/19
- ----
-include/posixselect.h
- - new include file, encapsulates select(2) includes and defines for
- bash and readline. Inspired by patch from Mike Frysinger
- <vapier@gentoo.org>
-
-lib/sh/input_avail.c
- - include "posixselect.h"
-
-lib/readline/{input,parens}.c
- - include "posixselect.h" instead of using inline includes
- - use new USEC_TO_TIMEVAL define to make sure that values for timeouts
- greater than one second are handled properly
-
-lib/sh/fpurge.c
- - updated implementation, taken from gnulib
-
- 4/21
- ----
-lib/glob/glob.c
- - in finddirs, don't try to free a return value of glob_error_return
- from glob_vector. Bug and fix from werner@suse.de
-
-lib/readline/signals.c
- - in rl_echo_signal_char, check that SIGQUIT and SIGTSTP are defined
- before trying to use them. Bug report and fix from Volker Grabsch
- <vog@notjusthosting.com>
-
- 4/24
- ----
-aclocal.m4
- - add conditional inclusion of <stdint.h> to BASH_CHECK_TYPE
-
-bashtypes.h,lib/sh/strto[iu]max.c
- - include <stdint.h> if present for any existing declaration of
- intmax_t and uintmax_t. Fixes Interix problem reported by
- Markus Duft <mduft@gentoo.org>
-
-lib/sh/strindex.c,externs.h,builtins/common.h
- - renamed strindex to strcasestr to agree with other implementations
- (e.g., BSD, MacOS X, gnulib); changed callers
-
-lib/sh/{strindex.c,Makefile.in},Makefile.in
- - renamed strindex.c to strcasestr.c
-
-configure.in
- - add strcasestr to call to AC_REPLACE_FUNCS, take advantage of
- existing libc implementations
-
-config.h.in
- - add define for HAVE_STRCASESTR
-
-lib/sh/mbscmp.c
- - fix mbscmp to return correct values when the strings do not contain
- valid multibyte characters. Ideas from gnulib
-
-xstrchr.c
- - only compare current character against C if mblength == 1
-
-{shell,variables}.c
- - changed some xstrchr calls back to strchr when the arguments cannot
- contain multibyte characters
-
-lib/sh/{xstrchr.c,Makefile.in},Makefile.in
- - renamed xstrchr to mbschr; renamed file to mbschr.c
-
-aclocal.m4
- - change BASH_CHECK_MULTIBYTE to use AC_REPLACE_FUNCS(mbschr)
-
-externs.h
- - extern declarations for mbscmp and mbschr, conditional on the usual
- HAVE_MBSCMP and HAVE_MBSCHR defines
-
-general.h,{alias,arrayfunc,bashline,general,execute_cmd,subst}.c
- - changed calls to xstrchr to mbschr
-
-doc/bash.1
- - use `pathname expansion' consistently, not `filename expansion' or
- `filename generation'
-
-doc/bashref.texi
- - use the phrase `filename expansion' consistently (since this is
- what the Gnu people prefer) instead of `pathname expansion' or
- `filename generation'
-
-aclocal.m4,config.h.in
- - check for mbscasecmp in BASH_CHECK_MULTIBYTE, define HAVE_MBSCASECMP
- if found
-
-lib/sh/{mbscasecmp.c,Makefile.in}
- - new file, case-insensitive multibyte string comparison
-
-externs.h
- - extern declaration for mbscasecmp
-
- 4/25
- ----
-lib/readline/display.c
- - in _rl_move_cursor_relative, don't adjust dpos by woff if it's
- already less than woff (don't want it less than 0)
- - in _rl_move_cursor_relative, short-circuit right away if the cursor
- is at columns 0 and `new' is 0 (doesn't matter if it's a multibyte
- locale or not, or whether there are invisible chars in the prompt)
- - in _rl_move_cursor_relative, go ahead and adjust dpos if
- prompt_physical_chars >= _rl_screenwidth (previous check was just > )
- Fixes bug reported by Andreas Schwab <schwab@linux-m68k.org>
-
- 4/28
- ----
-lib/glob/glob.c
- - in glob_vector, don't add an empty pathname ("") if we're adding the
- currect directory to the dirlist and GX_NULLDIR is set -- we can just
- ignore it, since the passed directory name (".") was created by
- the caller. Fixes bug reported by Matt Zyzik <matt.zyzik@nyu.edu>
-
- 5/5
- ---
-subst.c
- - make expansion of $@ and $* when set -u is in effect and there are
- no positional parameters be a non-fatal error. This is the
- consensus of the austin group, though it is not historical practice.
- Message from Geoff Clare <20090505091501.GA10097@squonk.masqnet> of
- 5 May 2009 and http://austingroupbugs.net/view.php?id=155
-
-
- 5/20
- ----
-lib/glob/glob.c
- - tentative fix to glob_filename to compensate for glob_vector putting
- null pathname at front of result vector when dflags&GX_NULLDIR.
- Current fix manually removes empty string element from front of
- result vector; a better fix would be to use a flag so glob_vector
- doesn't add it at all. Augments patch from 4/28, which appears to
- have broken some things. Fixes bug reported by Matt Zyzik
- <matt.zyzik@nyu.edu>
-
- 5/22
- ----
-
-lib/glob/glob.c
- - better fix for glob_filename; supersedes patch of 5/20. Now the
- code does not set GX_ADDCURDIR if directory_len == 0 and the
- function has not been called recursively ((flags & GX_ALLDIRS) == 0).
- Better fix for bug reported by Matt Zyzik <matt.zyzik@nyu.edu>
-
-Makefile.in
- - fix build race condition that occurs in some makes caused by
- libreadline.a and libhistory.a containing some of the same files
- (e.g., xmalloc.o) and conflicting when trying to build both at
- the same time. Reported by Mike Frysinger <vapier@gentoo.org>
-
- 5/25
- ----
-lib/readline/vi_mode.c
- - fix _rl_vi_initialize_line so that the loop counter is not
- unsigned (it doesn't matter, but it eliminates a compiler warning).
- Bug reported by Dave Caroline <dave.thearchivist@gmail.com>
-
- 5/26
- ----
-doc/{bash.1,bashref.texi}
- - add text to the description of array variables making it clear
- that an array variable is not considered set until a subscript
- has been assigned a value
-
- 5/29
- ----
-lib/readline/text.c
- - fix rl_change_case to handle case where mbrtowc doesn't find a
- valid multibyte character
-
-lib/readline/vi_mode.c
- - fix _rl_vi_change_mbchar_case to handle case where mbrtowc doesn't
- find a valid multibyte character
-
-lib/sh/casemod.c
- - fix sh_modcase to handle case where mbrtowc doesn't find a valid
- multibyte character
-
-lib/readline/mbutil.c
- - fix _rl_find_next_mbchar_internal to not call mbrtowc at the end of
- the string, since implementations return different values -- just
- break the loop immediately
-
-lib/readline/display.c
- - fix rl_redisplay to make same sort of cursor position adjustments
- based on multibyte locale and _rl_last_c_pos when performing
- horizontal scrolling rather than line wrapping. Probably still
- more to do. Fixes bug reported by jim@jim.sh
-
- 6/5
- ---
-doc/{bash.1,bashref.texi}
- - added some more explanation of the inheritance of the ERR trap at
- the suggestion of Thomas Pospisek <tpo@sourcepole.ch>
-
-findcmd.c
- - use eaccess(2) if available in file_status to take other file
- access mechanisms such as ACLs into account. Patch supplied
- by werner@suse.de
-
- 6/12
- ----
-xmalloc.c
- - also calculate lowest brk() value the first time xmalloc/xrealloc
- (and their sh_ counterparts) are called
- - error messages consolidated into a single function (allocerr/
- sh_allocerr) to avoid string duplication
-
- 6/16
- ----
-variables.c
- - changes to allow variables.c to be compiled if ALIAS is not defined.
- Bug and fix from John Gatewood Ham <uraphalinuxserver@gmail.com>
-
-lib/sh/getcwd.c
- - fix so systems defining BROKEN_DIRENT_D_INO have the necessary
- defines. Fix from Jay Krell <jay.krell@cornell.edu>
-
-configure.in
- - add -D_ALL_SOURCE to interix CFLAGS for struct timezone definition.
- Bug and fix from John Gatewood Ham <uraphalinuxserver@gmail.com>
-
- 6/29
- ----
-variables.c
- - change initialize_shell_variables to add environment variables with
- invalid names to the variables hash table, but marking them as
- invisible and imported
- - new function, export_environment_candidate. Used when creating the
- export environment for commands to include variables with invalid
- names inherited from the initial environment. Apparently this
- behavior is widespread
- - change make_var_export_array to use export_environment_candidate
- rather than visible_and_exported to test variables for inclusion
- in the export environment
-
- 7/1
- ---
-builtins/read.def
- - fix a memory leak where the number of fields is not the same as
- the number of variables passed to `read'. Bug report from
- werner@suse.de
-
-builtins/command.def
- - move section of code that sets PATH from -p option before the
- verbose-handling section, so command -v and command -V honor
- the PATH set by command -p. Bug report and fix from
- ohki@gssm.otsuka.tsukuba.ac.jp
-
- 7/9
- ---
-subst.c
- - change brace_expand_word_list to defer brace expansion on compound
- array assignments that are arguments to builtins like `declare',
- deferring the expansion until the assignment statement is processed.
- Fixes inconsistency reported by agriffis@n01se.net
-
- 7/16
- ----
-bashline.c
- - fix bash_execute_unix_command to set rl_point correctly based on
- READLINE_POINT. The old method of using save_point will not
- work because maybe_make_readline_line will change rl_point. Bug
- reported by Henning Bekel <h.bekel@googlemail.com>
-
-trap.c
- - fix _run_trap_internal and run_pending_traps to save and restore
- value of subst_assign_varlist so the dispose_words on it doesn't
- leave dangling pointers after the trap handler runs. Fixes bug
- reported by Marc Herbert <marc.herbert@gmail.com>
-
- 7/22
- ----
-subst.c
- - fix off-by-one error in pos_params when computing positional
- parameters beginning with index 0. Bug and fix from Isaac Good
- <isaacgood@gmail.com>
-
- 7/24
- ----
-lib/readline/display.c
- - add code to _rl_move_cursor_relative and _rl_col_width to short-
- circuit a few special cases: prompt string and prompt string plus
- line contents, both starting from 0. Saves a bunch of calls to
- multibyte character functions using already-computed information.
- As a side effect, fixes bug reported by Lasse Karkkainen
- <tronic+8qug@trn.iki.fi>
-
-subst.c
- - fixed a problem in split_at_delims that could leave *cwp set to -1
- if the line ends in IFS whitespace and SENTINEL is one of those
- whitespace characters. Fixes problem with setting COMP_CWORD for
- programmable completion reported by Ville Skytta <ville.skytta@iki.fi>
-
-bashline.c
- - change bash_execute_unix_command to clear the current line (if the
- terminal supplies the "ce" attribute) instead of moving to a new
- line. Inspired by report from Henning Bekel <h.bekel@googlemail.com>
-
-builtins/printf.def
- - changes to allow printf -v var to assign to array indices, the way
- the read builtin can. Suggested by Christopher F. A. Johnson
- <cfajohnson@gmail.com>
-
-lib/readline/complete.c
- - fix rl_old_menu_complete and rl_menu_complete to appropriately set
- and unset RL_STATE_COMPLETING while generating the list of matches.
- Fixes debian bug #538013 reported by Jerome Reybert
- <jreybert@gmail.com>
-
- 7/25
- ----
-execute_cmd.c
- - change execute_builtin to temporarily turn off and restore the ERR
- trap for the eval/source/command builtins in the same way as we
- temporarily disable and restore the setting of the -e option.
- Fixes bug reported by Henning Garus <henning.garus@googlemail.com>
-
- 7/27
- ----
-shell.c
- - add fflush(stdout) and fflush(stderr) to exit_shell before closing
- any file descriptors at exit time (e.g., coproc pipes)
-
- 7/30
- ----
-lib/readline/complete.c
- - new function rl_backward_menu_complete, just passes negative count
- argument to rl_menu_complete
- - change rl_menu_complete to act appropriately if rl_last_command is
- rl_backward_menu_complete, so we can cycle forward and backward
- through the list of completions
-
-lib/readline/doc/{readline.3,rluser.texi},doc/bash.1
- - document new "menu-complete-backward" bindable readline function.
- Suggested by Jason Spiro <jasonspiro04@gmail.com>
-
-lib/readline/vi_keymap.c
- - add binding of C-n to menu-complete and C-p to menu-complete-backward
- in vi-insert keymap, as suggested by Jason Spiro
- <jasonspiro04@gmail.com>
-
-pcomplete.c
- - fixed a bug in programmable_completions: the options it returned from
- the compspec it found were set before generating the completions,
- which meant that any changes made by "compopt" were overridden and
- only in effect for the duration of the executing shell function
- rather than the entire completion. Fixes bug reported by Ville
- Skytta <ville.skytta@iki.fi>
-
- 7/31
- ----
-lib/readline/keymaps.c
- - fixed memory leak in rl_discard_keymap by freeing storage associated
- with hierarchical keymaps
- - new convenience function, rl_free_keymap, that calls rl_discard_keymap
- and frees the keymap passed as an argument
-
-lib/readline/util.c
- - new bindable keymap function, _rl_null_function, to be used internally
-
-lib/readline/rlprivate.h
- - extern declaration for _rl_null_function
-
-lib/readline/bind.c
- - fix rl_generic_bind in the case where we are trying to override a
- keymap with a null function (e.g., when trying to unbind it). We
- can't use a NULL function pointer in ANYOTHERKEY since that's
- indistinguishable from the keymap not having been overridden at all.
- We use _rl_null_function instead, which simply does nothing. We
- could add an rl_ding to it later. Fixes problem with hitting ESC
- repeatedly while in vi command mode reported by James Rowell
- <jrjimmy801-misc1@yahoo.com>
-
-builtins/bind.def
- - call rl_bind_keyseq instead of rl_set_key for -r option
-
-lib/readline/readline.c
- - Set vi_movement_keymap[ESC] to _rl_null_function after binding the
- arrow keys in bind_arrow_keys() to allow vi-mode users to hit ESC
- multiple times in vi command mode while still allowing the arrow
- keys to work
-
- 8/2
- ---
-bashline.c
- - fix clear_hostname_list by setting hostname_list_initialized to 0
- after freeing all list members. Fixes bug reported by Freddy
- Vulto <fvulto@gmail.com>
-
-lib/readline/display.c
- - in update_line, if we copy data from one line to another because we
- are wrapping a multibyte character from, say, the first line to the
- second, we need to update OMAX and the line indices to account for
- the moved data. Bug report and fix from Martin Hamrle
- <martin.hamrle@gmail.com>
-
- 8/3
- ---
-pcomplete.h
- - defines for EMPTYCMD ("_EmptycmD_") and DEFAULTCMD ("_DefaultCmD_")
-
-builtins/complete.def
- - change compopt_builtin to make -E work on the "empty" command
- completion
- - fix print_compitem and print_compopts to replace EMPTYCMD with -E
- - added -D (default) option to complete/compgen/compopt. No supporting
- code yet
-
-doc/bash.1,lib/readline/doc/rluser.texi
- - document new -D, -E options to compopt
- - document new -D option to complete/compgen
-
-shell.h
- - new define, EX_WEXPCOMSUB, value of 125
- - new define, EX_RETRYFAIL, value of 124 (for programmable completion)
-
-subst.c
- - use EX_WEXPCOMSUB instead of literal 125 as exit status when a shell
- invoked to run wordexp(3) with the -n option supplied attempts a
- command substitution
-
-pcomplete.c
- - new define, PCOMP_RETRYFAIL, used to indicate a "failure, retry with
- next completion" status to the programmable completion code
-
- 8/4
- ---
-pcomplete.c
- - changed gen_shell_function_matches to take an extra parameter
- indicating whether the specified shell function was not found or
- returned the special "fail/retry" status, and, if it was either,
- to not bother returning any matches list
- - changed gen_compspec_completions to take an extra parameter to pass
- through the "found" status from gen_shell_function_completions
- - new function gen_progcomp_completions to take care of searching for
- and evaluating a compspec for a particular word, saving its status,
- and returning to its caller (programmable_completions) whether or
- not to retry completion. This function also checks whether a
- retry changed the compspec associated with a command and short-
- circuits the retry if it has not
- - changed programmable_completions to try default completion (if set)
- if a specific completion was not found for a command
- - changed programmable_completions to implement "fail/retry" semantics
- for a shell function that returns 124 and changes the compspec
- associated with the command. All based on proposal and changes from
- Behdad Esfahbod (Red Hat bugzilla 475229)
-
-doc/bash.1,lib/readline/doc/rluser.texi
- - documented new dynamic programmable completion functionality
-
- 8/5
- ---
-stringlib.c
- - first argument to substring() is now `const char *'
-
-externs.h
- - changed extern declaration for substring()
-
-subst.c
- - skipsubscript now takes a third FLAGS argument, passes to
- skip_matched_pair
- - skip_matched_pair now interprets flags&1 to mean not to parse
- matched pairs of quotes, backquotes, or shell word expansion
- constructs
-
-{subst,general,expr}.c
- - changed skipsubscript() callers
-
-assoc.c
- - changed assoc_to_assign to double-quote the key if it contains any
- shell metacharacters
-
-arrayfunc.c
- - use skipsubscript in quote_assign rather than quote any glob
- characters in the subscript of an array assignment
- - in assign_compound_array_list, call skipsubscript with a flags
- argument of 1 if assigning an associative array to avoid trying
- to re-parse quoted strings
-
-redir.c
- - set expanding_redir before expanding body of here documents and
- here strings to avoid looking for variables in temporary env
-
- 8/7
- ---
-lib/readline/readline.c
- - in _rl_dispatch_callback, return value of -3 means that we have
- added to a key sequence, but there are previous matches in the
- sequence. Don't call _rl_subseq_result if we get a -3 from a
- previous context in the chain; just go back up the chain. Report
- and fix from <freehaha@gmail.com>
-
-bashline.c
- - fixes to history_completion_generator and bash_dabbrev_expand to
- make dabbrev-expand inhibit suppressing of appending space char
- to matches. Have to do it with the generator too because
- rl_menu_complete turns off suppressing the appended space in
- set_completion_defaults(). Suggestion from Dan Nicolaescu
- <dann@ics.uci.edu>
- - suppress completion match sorting in bash_dabbrev_expand by
- setting rl_sort_completion_matches = 0. Suggestion from Dan
- Nicolaescu <dann@ics.uci.edu>
- - don't qsort history match list in build_history_completion_array
- if dabbrev_expand_active == 1
- - start the loop in build_history_completion_array that gathers words
- from history for possible completions from the end of the list
- rather than the beginning. It doesn't matter where you start if
- the results are sorted, and dabbrev-expand is supposed to offer
- the most recent completions first
-
- 8/12
- ----
-execute_cmd.c
- - change to execute_command_internal to make [[ ... ]] conditional
- command subject to settings of `set -e' and the ERR trap
-
- 8/14
- ----
-execute_cmd.c
- - change to execute_command_internal to make (( ... )) arithmetic
- command subject to settings of `set -e' and the ERR trap
-
-lib/readline/text.c
- - new bindable function, rl_skip_csi_sequence, reads the characters
- that make up a control sequence as defined by ECMA-48. Sequences
- are introduced by the Control Sequence Indicator (CSI) and
- contain a defined set of characters. Insert, End, Page Up and so
- on are CSI sequences. Report and code from Andy Koppe
- <andy.koppe@gmail.com>
-
-lib/readline/readline.h
- - extern declaration for rl_skip_csi_sequence
-
-lib/readline/funmap.c
- - new bindable command "skip-csi-sequence", runs rl_skip_csi_sequence
-
-doc/bash.1,lib/readline/doc/{readline.3,rluser.texi}
- - documented new bindable command "skip-csi-sequence", unbound by
- default
-
-builtins/evalfile.c
- - fix _evalfile to remove embedded null bytes from the file read
- into the string. Report and proposed fix from Roman Rakus
- <rrakus@redhat.com>
-
-{configure,config.h}.in
- - check for syslog(3), define HAVE_SYSLOG
- - check for syslog.h, define HAVE_SYSLOG_H
-
-config-top.h
- - new define SYSLOG_HISTORY, disabled by default
-
-config-bot.h
- - if HAVE_SYSLOG or HAVE_SYSLOG_H are not defined, undef SYSLOG_HISTORY
-
-bashhist.c
- - if SYSLOG_HISTORY is defined, call bash_syslog_history with the
- line added to the history in bash_add_history.
- - new function, bash_syslog_history(line), sends line to syslog at
- user.info. The line is truncated to send no more than 600
- (SYSLOG_MAXLEN) bytes to syslog. Feature requested by many, and
- required by some national laws
-
-sig.c
- - in termsig_handler, resend SIGHUP to children if subshell_environment
- indicates we're a shell performing command or process substitution
-
-jobs.c
- - add CHECK_TERMSIG calls to wait_for in addition to the ones in
- waitchld()
-
-builtins/shopt.def
- - new functions set_bashopts, parse_bashopts, and initialize_bashopts
- to manage new environment variable $BASHOPTS, like $SHELLOPTS but
- for shopt options
- - change toggle_shopts to call set_bashopts after setting options, so
- $BASHOPTS reflects new values
-
-shell.c
- - call initialize_bashopts after calling initialize_shell_options at
- shell startup
-
-configure.in
- - new configure `enable' option --enable-exended-glob-default, to
- set the initial default value of the `extglob' shell option
-
-config.h
- - new define, EXTGLOB_DEFAULT, controlled by the `extended-glob-default'
- configure option
-
-pathexp.c
- - initialize extended_glob variable to EXTGLOB_DEFAULT
-
-doc/{bash.1,bashref.texi}
- - document new $BASHOPTS variable and its behavior
-
-doc/bashref.texi
- - document new --enable-extended-glob-default configure option
-
- 8/16
- ----
-print_cmd.c
- - new variables: xtrace_fd and xtrace_fp, the file descriptor and
- FILE * to which we send `set -x' tracing output. If fd == -1
- then fp == STDERR, the default mode
- - new function xtrace_init, sets xtrace_fd == -1 and xtrace_fp = stderr
- - new function xtrace_set (fd, fp), sets xtrace_fd and xtrace_fp
- to the arguments
- - new function xtrace_reset, handles closing old xtrace fd/fp and
- moving them back to -1/stderr
- - new function xtrace_fdchck, calls xtrace_reset if the fd passed as
- an argument is xtrace_fd
- - change xtrace functions to fprintf to xtrace_fp instead of stderr
-
-shell.c
- - call xtrace_init() very early in main()
-
-variables.c
- - new special variable, BASH_XTRACEFD, holds file descriptor used for
- set -x trace output. Inspired by suggestion from Bruce Korb
- <bruce.korb@gmail.com>
-
-doc/{bash.1,bashref.texi}
- - added description of new BASH_XTRACEFD variable
-
-redir.c
- - add calls to xtrace_fdchk to the redirections that close file
- descriptors, so we notice if we close BASH_XTRACEFD and compensate
- accordingly (same places that call coproc_fdchk())
-
- 8/18
- ----
-lib/readline/text.c
- - change to _rl_replace_text to add error checks: start must be <=
- end, and we don't call rl_insert_text if passed the empty string
-
-config.h.in
- - add define for HAVE_ICONV, already found by intl autoconf macros
- - add define for HAVE_LOCALE_CHARSET
-
-aclocal.m4
- - add check for locale_charset() to BASH_CHECK_MULTIBYTE
-
-lib/sh/fnxform.c
- - new file with two public function: fnx_tofs and fnx_fromfs.
- Primarily intended for use on MacOS X, they use iconv to convert
- between whatever the current locale encoding is and "UTF-8-MAC",
- a special encoding on OS X in which all characters are
- decomposed unicode, as the HFS+ filesystem stores them. These
- functions return a pointer to a local buffer, allocated once and
- resized as necessary, to avoid too many allocations; callers
- should not free the return value, since it may be the string
- passed
-
-Makefile.in
- - make sure LIBICONV is set by autoconf (@LIBICONV@) and added to
- list of link libraries
-
-externs.h
- - new extern declarations for fnx_fromfs and fnx_tofs
-
-lib/glob/glob.c
- - convert the filename read using readdir() in glob_vector() using
- fnx_fromfs and use that value in the call to strmatch. This
- ensures that we're using the precomposed Unicode value of the
- filename rather than the native decomposed form. Original bug
- report from Len Lattanzi <llatanzi@apple.com>; fix inspired by
- Guillaume Outters <guillaume.outters@free.fr>
-
- 8/19
- ----
-lib/readline/complete.c
- - new completion hook: rl_filename_rewrite_hook, can rewrite or modify
- filenames read from the filesystem before they are compared to the
- word to be completed
-
-lib/readline/readline.h
- - extern declaration for rl_filename_rewrite_hook
-
-lib/readline/doc/rltech.texi
- - document rl_filename_rewrite_hook
-
-bashline.c
- - new function, bash_filename_rewrite_hook, assigned to
- rl_filename_rewrite_hook. Calls fnx_fromfs to convert from
- filesystem format to "input" format. This makes completing
- filenames with accented characters work on Mac OS X
-
- 8/20
- ----
-lib/readline/bind.c
- - new bindable variable "skip-completed-text", bound to
- _rl_skip_completed_text. If enabled, it means to note when
- completing before the end of a word and skipping over characters
- after rl_point that match in both the completion to be inserted
- and the word being completed. It means that completing
- `Makefile' with the cursor after the `e' results in `Makefile'
- instead of `Makefilefile'. Inspired by an idea from Jared
- Yanovich <phierunner@comcast.net> from back in 2004
-
-lib/readline/rlprivate.h
- - extern declaration for _rl_skip_completed_text
-
-lib/readline/complete.c
- - implement semantics of _rl_skip_completed_text in insert_match:
- skip characters in `replacement' that match chars in rl_line_buffer
- from the start of the word to be completed
-
- 8/21
- ----
-error.c
- - change parser_error to set last_command_exit_value to 2 before
- calling exit_shell (if set -e is enabled), so any exit or ERR
- trap gets the right value of $?. Suggestion from Stefano
- Lattarini <stefano.lattarini@gmail.com>
-
-braces.c
- - fix expand_seqterm so that a non-zero-prefixed term that's longer
- than a zero-prefixed term determines the length of each term
- in the brace-expanded sequence. This means that things like
- {01..100} will have three digits in all the elements of the
- expanded list. Fixes bug reported by Jeff Haemer
- <jeffrey.haemer@gmail.com>
-
- 8/24
- ----
-{arrayfunc,variables}.c
- - when inserting a value into an associative array using syntax like
- T=v where T is an already-declared associative array using key "0",
- make sure the key is in newly-allocated memory so it can be freed
- when the variable is unset. Fixes bug reported as redhat 518644
- by Jon Fairbairn
-
- 8/26
- ----
-lib/readline/funmap.c
- - add "old-menu-complete" binding for rl_old_menu_complete
-
-lib/readline/readline.h
- - add extern declaration for rl_old_menu_complete
-
-subst.c
- - fix memory leak when processing ${!prefix@}. Need to dispose all
- words in the word list created from all matching variable. Fixes
- bug reported by muszi@muszi.kite.hu.
-
- 8/29
- ----
-execute_cmd.c
- - add fflush(stdout) and fflush(stderr) to child coproc code before
- calling exit after execute_in_subshell
-
- 8/31
- ----
-lib/readline/{{bind,readline}.c,rlprivate.h}
- - new bindable variable, "echo-control-characters", enabled by default.
- This controls whether or not readline honors the tty ECHOCTL bit
- and displays characters corresponding to keyboard-generated signals.
- Controlled by _rl_echo_control_chars variable, declared in readline.c
-
-lib/readline/signals.c
- - if _rl_echo_control_chars == 0, don't go through _rl_echo_signal_char
-
-
-lib/readline/doc/{readline.3,rluser.texi}
- - document "echo-control-characters" bindable variable
-
- 9/1
- ---
-lib/readline/histexpand.c
- - hist_string_extract_single_quoted now takes an additional argument:
- a flags word. The only defined value (flags & 1) allows backslash
- to quote the single quote. This is to inhibit history expansion
- inside $'...' containing an escaped single quote.
- - change history_expand to call hist_string_extract_single_quoted
- with flags == 1 if it sees $'. Fixes bug reported by Sean
- Donner <sean.donner@gmail.com>
-
- 9/2
- ---
-builtins/printf.def
- - add a call to sh_wrerror if ferror() succeeds in the PRETURN macro,
- to print an error message in the case that the final fflush fails
- (for instance, because it attempts to write data that didn't have a
- trailing newline). Fixes bug reported by Stefano Lattarini
- <stefano.lattarini@gmail.com>
-
- 9/7
- ---
-arrayfunc.c
- - some fixes to assign_compound_array_list to avoid null pointer
- dereferences pointed out by clang/scan-build
-
-lib/glob/glob.c
- - fixes to udequote_pathname and wdequote_pathname to avoid possible
- null pointer dereferences pointed out by clang/scan-build
-
-lib/readline/undo.c
- - fix to _rl_copy_undo_list (function unused) to avoid deref of
- uninitialized pointer pointed out by clang/scan-build
-
-general.c
- - fix string_to_rlimtype so it works if passed a null pointer (though
- it never is)
-
-builtins/mapfile.def
- - fix to mapfile() to avoid possible null pointer dereference pointed
- out by clang/scan-build
-
-variables.c
- - fix to valid_exportstr to avoid possible null pointer dereferences
- pointed out by clang/scan-build
-
-bashline.c
- - fix to bash_execute_unix_command to avoid possible null pointer
- dereference if READLINE_LINE or READLINE_POINT is not bound
-
- 9/11
- ----
-[Prayers for the victimes of 9/11/2001]
-
-command.h
- - add `rflags' member to struct redirect to hold private flags and
- state information
- - change redirector to a REDIRECTEE instead of int to prepare for
- possible future changes
-
-{copy_cmd,dispose_cmd,make_cmd,print_cmd,redir}.c
- - changes resulting from type change of `redirector' member of struct
- redirect: change x->redirector to x->redirector.dest and add code
- where appropriate to deal with x->redirector.filename
-
-make_cmd.h
- - change extern declaration for make_redirection
-
-make_cmd.c
- - first argument of make_redirection is now a `REDIRECTEE' to prepare
- for possible future changes. First arg is now assigned directly to
- redirector member instead of assigning int to redirector.dest
-
-{make_cmd,redir}.c,parse.y
- - changes resulting from type change of first argument to
- make_redirection from int to REDIRECTEE. In general, changes are
- using REDIRECTEE sd and assigning old argument to sd.dest, then
- passing sd to make_redirection
-
-make_cmd.[ch],parse.y
- - add fourth argument to make_redirection: flags. Sets initial value
- of `rflags' member of struct redirect
- - changed all callers of make_redirection to add fourth argument of 0
-
- 9/15
- ----
-parse.y
- - change read_token_word to return REDIR_WORD for tokens of the form
- {var} where `var' is a valid shell identifier and the character
- following the } is a `<' or `>'
- - add REDIR_WORD versions of all input and output file redirections
- and here documents
-
-print_cmd.c
- - change input and output file redirection direction and here
- document cases of print_redirection to print a varname
- specification of the form {var} when appropriate. Still need
- to fix rest of cases
-
-redir.c
- - implement REDIR_VARASSIGN semantics for file input and output
- redirections and here documents
-
- 9/16
- ----
-parse.y
- - added REDIR_WORD versions of remaining redirection constructs except
- for err_and_out ones
-
-redir.c
- - handle REDIR_VARASSIGN semantics for rest of redirection constructs
- - accommodate REDIR_VARASSIGN when translating redirections
- - new function, redir_varvalue, does variable lookup for {v} when
- redirection needs the value (e.g., r_close_this)
-
-print_cmd.c
- - fix rest of cases to print {varname} when REDIR_VARASSIGN is set in
- redirect->rflags
-
-doc/{bash.1,bashref.texi}
- - document new {varname} REDIR_VARASSIGN form of redirections
-
-tests/vredir.{right,tests},vredir[1-5].sub
- - tests for new {varname} REDIR_VARASSIGN form of redirections
-
- 9/18
- ----
-subst.c
- - new flags argument to split_at_delims: these flags are ORd with
- SD_NOJMP and passed to skip_to_delim
- - change skip_to_delim to honor new SD_NOQUOTEDELIM flag by not
- checking whether or not single and double quotes are delimiters
- if it's set in passed flags until after skipping quoted strings.
-
-subst.h
- - change extern declaration for split_at_delims
- - new define for SD_NOQUOTEDELIM flag
-
-pcomplete.c
- - pass SD_NOQUOTEDELIM in flags argument to split_at_delims so single
- and double quotes, even though they're in
- rl_completer_word_break_characters, don't act as word delimiters
- for programmable completion. Fixes bug reported by Freddy
- Vulto <fvulto@gmail.com>
-
-lib/glob/glob.c
- - in glob_filename, after recursively scanning a directory specified
- with `**', turn off GX_ALLDIRS|GX_ADDCURDIR before calling
- glob_vector on the rest of the pathname, since it may not apply to
- the rest of the pattern. Turned back on if the filename makes it
- appropriate. Fixes bug reported by Anders Kaseorg <andersk@mit.edu>
-
-redir.c
- - change execute_null_command to fork a child to execute if any of
- the commands redirections have the REDIR_VARASSIGN flag set, since
- those commands are not supposed to have side effects
-
-test.c
- - < and > binary operators will obey the locale by using strcoll if
- the TEST_LOCALE flag is passed to binary_test
-
-test.h
- - new define for TEST_LOCALE
-
-execute_cmd.c
- - execute_cond_node sets TEST_LOCALE so [[ str1 < str2 ]] (and >)
- obey the locale. Fixes bug/incompatibility reported by Greg
- Wooledge <wooledg@eeg.ccf.org>
-
-doc/{bash.1,bashref.texi}
- - documented [[ command new locale-sensitive treatment of < and >
-
- 9/24
- ----
-configure.in
- - add "darwin10" cases like darwin8 and darwin9 to handle linking with
- included readline and history libraries
-
- 9/26
- ----
-lib/readline/display.c
- - modify change of 7/24 to use prompt_physical_chars instead of
- prompt_visible_length to account for visible multibyte characters in
- the line (usually in the prompt). Fixes debian bug #547264
- reported by Pietro Battiston <toobaz@email.it>
- - add flags argument to _rl_col_width; changed callers. flags > 0
- means that it's ok to use the already-computed prompt information;
- flags == 0 means that we're expanding the prompt and we should not
- short-circuit
-
-parse.y
- - in decode_prompt_string, when expanding \w and \W on Mac OS X,
- use fnx_fromfs to convert from "filesystem" form to "input" form.
- This makes $PWD with multibyte characters work in the prompt
- string on Mac OS X
-
-lib/sh/fnxform.c
- - in fnx_fromfs and fnx_tofs, use templen instead of outlen as last
- argument in calls to iconv, since outlen is used to keep track of
- the size of the buffer, and iconv potentially modifies its
- `outbytesleft' argument
-
- 9/29
- ----
-subst.c
- - make skip_to_delim understand how to skip over process substitution
- constructs the way it skips $(...) command substitution
-
- 9/30
- ----
-lib/readline/terminal.c
- - don't set the `terminal has meta key' flag if the `MT' capability is
- available; that means something completely different
-
- 10/1
- ----
-builtins/help.def
- - make sure width is at least 7, since we pass `width/2 - 3' to strncpy
- as the length argument. Terminal widths <= 6 are converted to 80.
- Fixes bug reported by Chris Hall <c@pobox.co.uk>
-
-configure.in
- - changed version to 4.1-alpha
-
-subst.h
- - new flag for skip_to_delim: SD_NOSKIPCMD, which means to not skip
- over embedded command and process substitutions, but rather to look
- for delimiters within them
-
-subst.c
- - implement semantics of SD_NOSKIPCMD in skip_to_delim
-
-bashline.c
- - call skip_to_delim with SD_NOSKIPCMD from find_cmd_start, so
- programmable completion can use the completion defined for `b' for
- command lines like "a $(b c". Fixes inconsistency/bug reported by
- Freddy Vulto <fvulto@gmail.com>
-
-parser.h
- - replace unused PST_CMDTOKEN parser state value with PST_EXTPAT,
- means currently parsing an extended glob pattern (extglob)
-
-parse.y
- - fix cond_node() so that extended_glob is set before parsing the
- rhs of the `==' or `!=' operators. For ksh93 compatibility.
- - reset extended_glob to global value (saved in parse_cond_command())
- in reset_parser()
-
- 10/5
- ----
-jobs.c
- - change waitchld() to only interrupt the wait builtin when the shell
- receives SIGCHLD in Posix mode. It's a posix requirement, but
- makes easy things hard to do, like run a SIGCHLD trap for every
- exiting child. Change prompted by question from Alex Efros
- <powerman@powerman.name>
-
-doc/bashref.texi
- - document new posix mode behavior about SIGCHLD arriving while the
- wait builtin is executing when a trap on SIGCHLD has been set
-
- 10/6
- ----
-lib/readline/histexpand.c
- - fix hist_expand to keep from stopping history expansion after the
- first multibyte character (a `break' instead of a `continue').
- Fixes debian bug (#549933) reported by Nikolaus Schulz
- <microschulz@web.de>
-
- 10/8
- ----
-builtins/read.def
- - implement new `-N nchars' option: read exactly NCHARS characters,
- ignoring any delimiter, and don't split the result on $IFS.
- Feature requested by Richard Stallman <rms@gnu.org>
-
-doc/{bash.1,bashref.texi}
- - document new `read -N' option
-
- 10/9
- ----
-lib/readline/bind.c
- - new bindable variable, "enable-meta-key", controls whether or not
- readline enables any meta modifier key the terminal claims to
- support. Suggested by Werner Fink <werner@suse.de>
-
-lib/readline/doc/{readline.3,rluser.texi},doc/bash.1
- - document new readline "enable-meta-key" bindable variable
-
- 10/10
- -----
-trap.c
- - new function, free_trap_string(), does what it says and turns off
- SIG_TRAPPED flag without changing signal disposition
-
-[bash-4.1-alpha frozen]
-
- 10/16
- -----
-builtins/mapfile.def
- - return an error if the variable passed is not an indexed array.
- Fixes bug reported by Nick Hobson <nick.hobson@yahoo.com>
- - change help text to make it clear that an indexed array is required
-
-doc/{bash.1,bashref.texi}
- - changed description of mapfile to note that the array variable
- argument must be an indexed array, and mapfile will return an
- error if it is not
-
-subst.c
- - change expand_string_unsplit and expand_string_leave_quoted to
- add the (previously unused) W_NOSPLIT2 flag to the created word
- - change expand_word_internal to understand W_NOSPLIT2 to mean that
- we're not going to split on $IFS, so we should not quote any
- characters in IFS that we add to the result string. Fixes bug
- reported by Enrique Perez-Terron <enrio@online.no>
- - change cond_expand_word similarly. Fixes rest of bug reported by
- Enrique Perez-Terron <enrio@online.no>
-
-parse.y
- - save and restore value of last_command_subst_pid around call to
- expand_prompt_string in decode_prompt_string. Fixes bug that causes
- $? to be set wrong when using a construct like false || A=3 when
- set -x is enabled and $PS4 contains a command substitution. Reported
- by Jeff Haemer <jeffrey.haemer@gmail.com>
-
- 10/17
- -----
-execute_cmd.c
- - in execute_in_subshell, make sure we set setjmp(return_catch) before
- running the command, in case the command or its word expansion
- calls jump_to_top_level. Fixes bug reported by Nils Bernhard
- <nils.bernhard@yahoo.de>
-
-subst.c
- - new PF_NOSPLIT2 flag for param_expand
- - parameter_brace_expand takes a new `pflags' argument, before the
- `output' parameters; passes to param_expand as necessary
- - change parameter_brace_expand to call parameter_brace_expand_word
- with the PF_NOSPLIT2 flag if the pflags argument to
- parameter_brace_expand has it set
-
-parse.y
- - change report_syntax_error to set last_command_exit_value to
- EX_BADSYNTAX if parse_and_execute_level is > 0, indicating a
- syntax error while we're executing a dot script, eval string,
- trap command, etc.
-
-builtins/evalstring.c
- - in parse_and_execute, if parse_command() returns non-zero,
- indicating a parse error, print a warning message if the conditions
- would require a posix-mode shell to abort (parse error in a `.'
- script or eval string)
-
- 10/19
- -----
-builtins/evalfile.c
- - even if the `check binary' flag is not passed to _evalfile, return an
- error after reading 128 null characters if called by `source', on
- the assumption that it's probably a binary file. [This will be in
- bash-4.1-beta]
-
- 10/24
- -----
-[bash-4.1-alpha released]
-
-bashline.c
- - don't call command_substitution_completion_function if we're
- completing a substring delimited by a single quote. Fixes bug
- reported by bash-bugs@atu.cjb.net
-
-lib/readline/complete.c
- - make sure _rl_skip_completed_text defaults to 0, as the
- documentation states (incorrect in bash-4.1-alpha)
- - in insert_match, skip over a close quote in the replacement text if
- the character at point when completion is invoked is a single
- quote. Fixes complaint from bash-bugs@atu.cjb.net
-
- 10/26
- -----
-shell.c
- - in main, make sure "$EMACS" is non-null before calling strstr on its
- value. Fixes Red Hat bug 530911 submitted by Mitchell Berger
-
-builtins/mapfile.def
- - don't save callback commands in shell history. Suggested by
- Jan Schampera <jan.schampera@web.de>
-
-mailcheck.c
- - in file_mod_date_changed, make sure the modification time is later
- than the saved modification date, not just that it's not equal.
- Fix from Evgeniy Dushistov <dushistov@mail.ru>
- - in file_access_date_changed, make sure the access time is later
- than the saved access time, not just that it's not equal
-
- 10/27
- -----
-builtins/shopt.def
- - added new `compat40' compatibility variable, with associated changes
- to shell_compatibility_level(), since the default compatibility level
- is now 41
-
-test.c
- - make the < and > operators to [[ use strcoll() only if the shell
- compatibility level is greater than 40 (it is 41 by default in
- bash-4.1)
-
- 10/28
- -----
-support/shobj-conf
- - decrease the default version of FreeBSD that creates shared libraries
- to 4.x. Advice from Peter Jeremy <peterjeremy@acm.org>
-
- 11/2
- ----
-parse.y
- - change parse_comsub to free `heredelim' and set it to 0 whenever the
- comsub scanner finds the end of a here document. Really need to
- implement a stack of here doc delimiters like in the parser (can we
- use redir_stack here, too?)
- - fix parse_comsub to not attempt to read another here doc delimiter
- after seeing a shell break character (that is not newline) if we
- already have one. Fixes Debian bash bug #553485, submitted by
- Samuel Hym <samuel.hym@gmail.com>
-
- 11/3
- ----
-variables.c
- - fix bind_variable_internal to call a variable's dynamic 'set function'
- with the right arguments depending on whether its an associative
- array, an indexed array, or a scalar. Fixes Ubuntu bug #471504
- https://bugs.launchpad.net/ubuntu/+source/bash/+bug/471504 reported
- by AJ Slater <aj.slater@gmail.com>
-
-[bash-4.1-beta frozen]
-
- 11/11
- -----
-builtins/printf.def
- - in getintmax(), in the case of a conversion error, return the partial
- value accumulated so far, which is suppose to be what
- strtoimax/strtoll/strtol returns
-
- 11/17
- -----
-[bash-4.1-beta released]
-
- 11/18
- -----
-builtins/{common.h,shopt.def},shell.c
- - changed shopt variable "set functions" to take the option name as
- the first argument; changed function prototypes and callers
-
-builtins/shopt.def
- - change set_compatibility_level() to turn off other compatNN options
- when one is set -- enforce mutual exclusivity. Fixes problem noted
- by Jan Schampera <jan.schampera@web.de>
-
- 11/19
- -----
-lib/readline/rltty.c
- - make sure prepare_terminal_settings() tests for the presence of
- ECHOCTL before using it. Fixes bug reported by Joachim Schmitz
- <schmitz@hp.com>
-
-config-top.h
- - new WORDEXP_OPTION define (off by default)
-
-shell.c
- - don't include the --wordexp option or the supporting function
- (run_wordexp) if WORDEXP_OPTION is not defined. Suggested by
- Aharon Robbins <arnold@skeeve.com>
-
-execute_cmd.c
- - in execute_cond_node, turn on comsub_ignore_return if the flags
- indicate we're ignoring the return value before calling
- cond_expand_word. Fixes bug reported by Anirban Sinha
- <asinha@zeugmasystems.com>
-
- 11/20
- -----
-lib/sh/snprintf.c,builtins/printf.def
- - change check for HAVE_ASPRINTF and HAVE_SNPRINTF to check if value
- is 1 or 0 rather than whether they are defined or not. This allows
- a value of 0 to enable function replacement
-
-configure.in,aclocal.m4
- - new autoconf macro, BASH_FUNC_SNPRINTF, checks for snprintf present
- and working as C99 specifies with a zero length argument. Idea
- from Greg Wooledge <wooledg@eeg.ccf.org>
- - new macro BASH_FUNC_VSNPRINTF, does same thing for vsnprintf
-
- 11/25
- -----
-subst.c
- - in command_substitute, only tell parse_and_execute to reset the line
- number in an interactive shell if sourcelevel == 0 -- we'll use the
- line numbers from the sourced file
-
-execute_cmd.c
- - in execute_simple_command, only subtract function_line_number from
- line_number if sourcelevel == 0. If sourcing, we'll use the line
- numbers from the sourced file. Fixes bug reported by Hugo
- Mildenberger <Hugo.Mildenberger@namir.de>
-
-builtins/declare.def
- - in declare_internal, call bind_assoc_variable instead of
- bind_array_variable in the case of declare -A foo=bar. Fixes bug
- reported by Bernd Eggink <monoped@sudrala.de>.
-
- 11/27
- -----
-lib/readline/util.c
- - change declaration for _rl_walphabetic to use prototype, assuming
- that any system with multibyte characters has a compiler that can
- handle prototypes. Fix for AIX compilation problem reported by
- Nick Hillman <nick_hillman@neverbox.com>
-
- 11/28
- -----
-execute_cmd.c
- - make funcnest file-scope static and unwind-protect its value in
- execute_function, so it can be used as a real measure of function
- call nesting
-
-general.c
- - fix off-by-one error in trim_pathname that caused it to short-circuit
- when PROMPT_DIRTRIM == number of directories - 1. Fixes bug
- reported by Dennis Williamson <dennistwilliamson@gmail.com>
-
- 11/29
- -----
-jobs.c
- - when fork() returns -1/EAGAIN, call waitchld(-1, 0) so the shell can
- reap any dead jobs before trying fork again. Currently disabled
- until bash-4.2 development starts
-
-lib/readline/complete.c
- - when incrementing _rl_interrupt_immediately, make sure it's greater
- than 0 before decrementing it. In practice, not a problem, but
- the right way to do it. Suggested by Jan Kratochvil
- <jan.kratochvil@redhat.com>
-
-lib/readline/signals.c
- - make sure rl_signal_handler doesn't set rl_caught_signal if
- _rl_interrupt_immediately is set, so RL_CHECK_SIGNALS doesn't
- cause it to be processed twice. Suggested by Jan Kratochvil
- <jan.kratochvil@redhat.com>
- - if the callback interface is being used, use the code path that
- immediately handles signals. This restores the readline-5.2
- behavior. Fixes GDB readline bug reported by Jan Kratochvil
- <jan.kratochvil@redhat.com>
-
- 12/18
- -----
-[bash-4.1-rc1 released]
-
- 12/22
- -----
-config-top.h
- - don't have SYSLOG_HISTORY enabled by default
-
-lib/sh/Makefile.in
- - add explicit dependency on pathnames.h for parallel make support
-
-externs.h
- - add extern declaration for xtrace_fdchk
-
-lib/sh/snprintf.c
- - add local prototype declarations for isinf, isnan if we are providing
- local definitions
-
-lib/sh/fnxform.c
- - add extern declaration for get_locale_var if HAVE_LOCALE_CHARSET not
- defined
-
-execute_cmd.c
- - define NEED_FPURGE_DECL so we pick up any extern declaration for
- fpurge (e.g., if the system doesn't provide it)
-
-builtins/shopt.def
- - correct prototype and declaration for set_shellopts_after_change so
- it's the correct type for shopt_set_func_t
- - add new function shopt_enable_hostname_completion that is the correct
- type for shopt_set_func_t; just calls enable_hostname_completion and
- returns its result
-
- 12/26
- -----
-doc/{bash.1,bashref.texi}
- - add \E and \" escape sequences to ANSI-C quoting description.
- Suggested by Aharon Robbins <arnold@skeeve.com>
-
- 12/29
- -----
-doc/bash.1
- - make sure shell and environment variable names are always in
- `small caps' bold. Suggested by Aharon Robbins <arnold@skeeve.com>
-
- 12/30
- -----
-{execute_cmd.c,parse.y,Makefile}
- - changes for building minimal configuration from Matthias Klose
- <doko@debian.org>
-
-[bash-4.1 frozen]
-
- 12/31
- -----
-[bash-4.1 released]
-
- 1/5/2010
- --------
-doc/bashref.texi
- - document compat32 and compat40 shopt options. Omission pointed out
- by Dilyan Palauzov <Dilyan.Palauzov@aegee.org>
-
- 1/6
- ---
-lib/readline/complete.c
- - use `convfn' (converted filename) instead of entry->d_name (filename
- read from file system) when adding partial or full completions to
- the command line. Bug and fix from Guillaume Outters
- <guillaume.outters@free.fr>
-
- 1/7
- ---
-builtins/printf.def
- - fix prototype in extern declaration for vsnprintf. Fix for bug
- reported by Yann Rouillard <yann@pleiades.fr.eu.org>
-
- 1/9
- ---
-parse.y
- - fix shell_getc to handle alias expansions containing quoted
- newlines. Problems in bash-4.1 with aliases containing quoted
- newlines in the middle of and at the end of their expansion.
- Fix for bug reported by Jonathan Claggett
- <jonathan@claggett.org>
- - change mk_alexpansion to not append a space to an alias
- expansion ending with a newline. Works with shell_getc
-
- 1/11
- ----
-lib/glob/Makefile.in
- - add dependencies on shell.h and pathnames.h. From Mike Frysinger
- <vapier@gentoo.org>
-
- 1/15
- ----
-doc/{bash.1,{bashref,version}.texi},lib/readine/doc/rluser.texi
- - some typo fixes from Aharon Robbins <arnold@skeeve.com>
- - added descriptions of ENV, COPROC, and MAPFILE variables
- - added descriptions of READLINE_LINE and READLINE_POINT
-
- 1/21
- ----
-arrayfunc.c
- - free `akey', the word-expanded index into the assoc array to avoid
- mem leak in array_value_internal
- - free index into assoc array in unbind_array_element
- - change array_value_internal to take an additional argument: an
- arrayind_t *. If not null, an index to an indexed array is
- returned there. If not an indexed array or subscript is @ or
- *, the value is unchanged
-
- 1/22
- ----
-builtins/ulimit.def
- - include <ulimit.h> if we found it during configure and we don't
- have resources. Fixes omission reported by Joachim Schmitz
- <jojo@schmitz-digital.de>
-
-{configure,config.h}.in
- - check for <ulimit.h>, define HAVE_ULIMIT_H if found
-
-lib/sh/oslib.c
- - include <signal.h> for extern declaration for kill(2) if
- HAVE_KILLPG not defined
-
-jobs.c
- - if HAVE_KILLPG is not defined, add an extern prototype decl for
- killpg()
-
- 1/24
- ----
-print_cmd.c
- - when printing here-string redirections, don't quote the string. The
- original quotes, if any, are still in place and don't need to be
- requoted. Fixes bug reported by Arfrever Frehtes Taifersar Arahesis
- <arfrever.fta@gmail.com>
-
-subst.c
- - fix array_length_reference to return 0 for variables that have not
- been assigned a value. Fixes bug reported by Mart Frauenlab
- <mart.frauenlob@chello.at>, but is not backwards compatible
-
-arrayfunc.[ch]
- - change array_value to take a new arrayind_t *indp parameter like
- get_array_value; changed extern prototype declaration
-
-subst.c
- - changed callers of array_value to add extra parameter
-
-expr.c
- - change expr_streval to set a new `lvalue' parameter with information
- about the string being evaluated: string, value, array index (if
- any), variable evaluated (if set).
- - saving and restoring current context now saves and restores the
- current `lvalue'
- - new function expr_bind_array_element, binds an array element with an
- already-computed index to a specified value
- - anywhere we set the current token to a string (STR), save and set
- the current lvalue
- - change calls to expr_bind_variable to check whether or not the
- current lvalue indicates an indexed array was evaluated, and, if so,
- call expr_bind_array_element using the already-computed index
- (curlval.ind). Fixes problems with dynamic variables (e.g., RANDOM)
- in array indices with {pre,post}-{inc,dec}rement and op=
- operators reported by <dennis@netstrata.com>
-
- 1/25
- ----
-expr.c
- - fix subexpr() to initialize curlval and lastlval when resetting all
- of the rest of the expression-parsing variables
-
- 1/26
- ----
-builtins/setattr.def
- - in show_var_attributes, if the variable is not set (value == 0),
- don't print `name=""', just print `name'. Pointed out by
- Mart Frauenlab <mart.frauenlob@chello.at>
-
-arrayfunc.c
- - fix array_keys to return NULL if the variable is not set or
- invisible. Pointed out by Mart Frauenlab <mart.frauenlob@chello.at>
- - change array_value_internal to return NULL for variable which has
- not been set
-
- 1/30
- ----
-bashline.c
- - in command_word_completion_function, don't call glob_pattern_p
- on hint -- use the already-computed `globpat'. At this point,
- hint might contain an already-dequoted globbing character, but
- glob_matches will be NULL. Fixes bug reported by
- coyote@wariat.org.pl
-
- 2/5
- ---
-builtins/exec.def
- - set extern variable "exec_argv0" to the argument to -a
-
-shell.c
- - if exec_argv0 is set, set dollar_vars[0] to it and set it to NULL,
- assuming it was set by `exec -a'. `exec -a foo' now sets $0 to
- foo in an executable shell script without a leading `#!' (fixes
- longstanding bug)
-
- 2/8
- ---
-variables.c
- - in push_func_var, if a variable is in a special builtin's temporary
- environment and needs to be propagated because we're in Posix mode,
- or we just need to propagate a variable, and we are executing in a
- function without any local variables (so the function-local variable
- context has no variable hash table), make sure we create a hash
- table so we have a place to save the variable to be propagated.
- Fixes bug reported by Crestez Dan Leonard <cdleonard@gmail.com>.
-
- 2/18
- ----
-builtins/hash.def
- - change add_hashed_command to remove the command being looked up from
- the hash table before trying to add it. That way, if it's not found,
- there won't be anything remaining in the hash table
-
- 2/26
- ----
-trap.[ch]
- - move IMPOSSIBLE_TRAP_HANDLER define to trap.h so other parts of the
- shell can use it
-
-parse.y
- - change yy_readline_get to use IMPOSSIBLE_TRAP_HANDER instead of NULL
- as a sentinel value for the SIGINT signal handler
- - make sure yy_readline_get resets interrupt_immediately to 0 after
- calling readline() using the same criteria it used to set it to 1
- before the call -- make the code symmetric. Suggested by Werner
- Fink <werner@suse.de>
-
-builtins/read.def
- - move assignment to `retval' before decrement of interrupt_immediately
- and terminate_immediately and call to discard_unwind_frame
- - move assign_vars label before decrement of interrupt_immediately and
- terminate_immediately so those variables get reset appropriately
- if read -t times out
-
-subst.h
- - new define for Q_DOLBRACE, indicates double-quoted ${...}
-
-subst.c
- - in parameter_brace_expand, before calling parameter_brace_expand_rhs,
- add Q_DOLBRACE to `quoted' if we're within double quotes.
- - in expand_word_internal, if the Q_DOLBRACE flag is set, remove a
- backslash escaping a }. Result of a Posix discussion on the
- austin-group list
-
- 2/27
- ----
-variables.c
- - new functions to save and restore the PIPESTATUS variable's internal
- array: save_pipestatus_array and restore_pipestatus_array
-
-variables.h
- - new extern declarations for save_pipestatus_array and
- restore_pipestatus_array
-
-trap.c
- - in run_pending_traps, _run_trap_internal, and run_exit_trap, save
- and restore $PIPESTATUS while traps are running. Fixes bug
- reported by Florian Bruhin <me@the-compiler.org>
-
-parse.y
- - use save_pipestatus_array and restore_pipestatus_array in
- save_parser_state and restore_parser_state, respectively, replacing
- inline code
-
-lib/readline/histfile.c
- - fix callers of history_filename to be prepared to cope with it
- returning NULL
- - change history_filename to return NULL if $HOME is not set, rather
- than trying to write the history file in the current directory.
- This is the default directory, used only if the application does
- not specify a history filename. Changed due to long-ago (unsent)
- bug report from OpenBSD
-
-{Makefile,config.h,configure}.in,externs.h,lib/sh/{dprintf.c,Makefile.in}
- - change fdprintf to dprintf, which is the Posix standard interface,
- look for it with configure, replace it if not available
-
- 2/28
- ----
-command.h
- - add new subshell flag, SUBSHELL_RESETTRAP. Indicates to the trap
- builtin that the shell is executing a command substitution and
- should free the trap strings we left unfreed by reset_signal_handlers()
-
-trap.c
- - free_trap_string() and free_trap_strings() are now compiled in
-
-builtins/trap.def
- - if changing a signal disposition and the SUBSHELL_RESETTRAP flag is
- set in subshell_environment, free the trap strings left unfreed by
- reset_signal_handlers
-
-subst.c
- - in command_substitute, set the SUBSHELL_RESETTRAP flag. This change
- is for Austin Group Posix interpretation 53
- (http://austingroupbugs.net/view.php?id=53)
-
- 3/7
- ---
-lib/sh/{Makefile.in,strchrnul.c},Makefile.in
- - implementation of strchrnul, from gnulib
-
-configure.in,config.h.in
- - look for strchrnul and compile in version in lib/sh/strchrnul.c if
- not available
- - look for mbsnrtowcs and define HAVE_MBSNRTOWCS if available
-
-lib/sh/xmbsrtowcs.c
- - new function, xdupmbstowcs2, fast version of xdupmbstowcs used when
- mbsnrtowcs is available and the indices are not required. Called
- from xdupmbstowcs as required. Initial patch from
- <0xe2.0x9a.0x9b@gmail.com>
-
- 3/22
- ----
-print_cmd.c
- - call print_deferred_heredocs virtually every time a recursive call
- to make_command_string_internal is made so here documents get
- printed correctly when they are attached to commands inside compound
- commands such as for and while. Fixes bug reported by Mike
- Frysinger <vapier@gentoo.org>
-
- 3/25
- ----
-builtins/printf.def
- - fix have_precision case in PF macro to call printf with precision
- instead of fieldwidth argument. Fixes bug reported by Rob Robason
- <rob@robason.net>
-
- 3/26
- ----
-trap.[ch]
- - new function, signal_is_hard_ignored, returns true if the shell
- inherited SIG_IGN as a signal's disposition
- - new function, set_original_signal (sig, handler), provides interface
- for rest of shell to set original_signals[sig] = handler
-
-execute_cmd.c
- - execute_disk_command needs to call reset_terminating_signals in the
- child process before resetting traps with restore_original_signals
-
-builtins/trap.def
- - call initialize_terminating_signals before calling display_traps for
- trap -p or trap without any other arguments. Possible future use
-
-lib/readline/complete.c
- - rl_filename_completion_function needs to call
- rl_filename_dequoting_function with `dirname' (which has already
- been tilde-expanded) instead of `users_dirname', because it calls
- opendir with `dirname'. Fixes bug reported by Stefan H. Holek
- <stefan@jarn.com>
-
- 3/27
- ----
-sig.c
- - experimental change to set_signal_handler: when setting the SIGCHLD
- handler, set the SA_RESTART flag so that interruptible system calls
- get restarted after a child dies. Fixes bug reported by Tomas
- Trnka <tomastrnka@gmx.com>, but needs further evaluation
-
-lib/sh/eaccess.c
- - eaccess(2) apparently does only half the job: it does not check that
- the permission bits on a file actually allow, for instance, execution.
- Need to augment with a call to sh_stataccess if eaccess returns
- success on FreeBSD. Fixes FreeBSD problem reported by Johan Hattne
- <johan.hattne@utsouthwestern.edu>
-
- 3/28
- ----
-parse.y,bashline.c,externs.h
- - history_delimiting_chars now takes a const char * as an argument:
- the line being added to the history. Changed callers
-
-parse.y
- - bash_add_history should not add a semicolon separator if the current
- history entry already ends in a newline. It can introduce syntax
- errors (e.g., when it results in a null command before a close brace).
- Fixes bug reported by Andreas Schwab <schwab@linux-m68k.org>
-
-parse.y
- - history_delimiting_chars needs to return a newline instead of a
- semicolon if it thinks the current line starts a here document
- (if it contains `<<'). Also keeps track of the fact with a new
- static variable, LAST_WAS_HEREDOC, so it can return the right
- sequence of newlines later for the here-document body. Fixes bug
- reported by Andreas Schwab <schwab@linux-m68k.org>
-
- 3/29
- ----
-lib/sh/eaccess.c
- - if the system has faccessat, sh_eaccess will now use it in
- preference to all other options
-
- 3/30
- ----
-subst.h
- - new string_extract and extract_dollar_brace_string flag value:
- SX_POSIXEXP, set if the shell is expanding one of the new Posix
- pattern removal word expansions
-
-parser.h
- - new definitions for "word expansion state", shared between parse.y
- and subst.c
-
-subst.c
- - include parser.h
-
- 4/9
- ---
-builtins/declare.def
- - make sure declare_internal calls bind_assoc_variable with newly-
- allocated memory for the key argument when using an implicit key
- of "0". Bug report and fix from Andreas Schwab
- <schwab@linux-m68k.org>
-
- 4/14
- ----
-lib/readline/input.c
- - restructure the rl_event_hook loop in rl_read_key to call the
- event hook after rl_gather_tyi() returns and rl_get_char has
- a chance to collect the input. Previous behavior was to call
- the event hook before attempting to read input. Problem
- reported by Anant Shankar <anantshankar17@gmail.com>
-
- 4/15
- ----
-builtins/fc.def
- - fc_builtin needs to check whether the calculation of last_hist
- leaves hlist[last_hist] == 0, and keep decrementing it until it
- leaves a non-null history entry or goes < 0. Currently only
- does this if saved_command_line_count > 0, indicating we're
- trying to edit a multi-line command. Fixes bug reported by
- Roman Rakus <rrakus@redhat.com>
-
- 4/17
- ----
-subst.c
- - new process substitution helper functions:
- unlink_fifo - closes a single FD or FIFO
- num_fifos - returns number of open FDs or active FIFOs
- copy_fifo_list - returns a bitmap of open FDs or active FIFOs
- by index into appropriate list (dev_fd_list or fifo_list)
- close_new_fifos - take a bitmap saved by copy_fifo_list and
- call unlink_fifo on any FD or FIFO open at the time of the
- call that is not marked as active in list
-
-execute_cmd.c
- - execute_builtin_or_function: use new framework to close process
- substitution FDs or FIFOs created by a shell builtin or shell
- function. Fixes bug reported by Charles Duffy <charles@dyfis.net>
-
-doc/{bash.1,bashref.texi}
- - document 'C and "C constants for printf builtin
-
- 4/22
- ----
-lib/readline/complete.c
- - new function to return screenwidth for use when displaying possible
- matches: complete_get_screenwidth; changed uses of _rl_screenwidth
- to use complete_get_screenwidth().
- - change complete_get_screenwidth to query (readline-private)
- _rl_completion_colums, $COLUMNS, then _rl_screenwidth in that order
- - change rl_display_match_list to deal with limit < 0 (which implies
- that cols == 0) when _rl_screenwidth > 0
-
-lib/readline/bind.c
- - new bindable variable: completion-display-width, controls the
- number of columns used when displaying completions with new
- sv_compwidth function to call when value is set or unset
-
-lib/readline/doc/{readline.3,rltech.texi}
- - documented completion-display-width variable
-
- 4/23
- ----
-execute_cmd.c
- - change execute_in_subshell to reset trap handlers without freeing
- the trap strings and set SUBSHELL_RESETTRAP. In line with Austin
- Group interp #53 (trap in a subshell).
- - ditto for execute_simple_command where it can be determined that
- the shell is going to run a builtin or function in a subshell
-
-trap.c
- - new function, get_all_original_signals, retrieves the original
- signal disposition for all signals
-
-trap.h
- - extern declaration for get_all_original_signals
-
-builtins/trap.def
- - change showtrap to display signals that are "hard ignored" as
- trap commands to ignore them, even though that trap command would
- be a no-op. Partial fix for feature request from Siddhesh
- Poyarekar <siddhesh.poyarekar@gmail.com>
- - change trap_builtin to call get_all_original_signals before displaying
- traps. This will show inherited ignored signals. Rest of feature
- request from Siddhesh Poyarekar <siddhesh.poyarekar@gmail.com>
-
-lib/readline/histexpand.c
- - fix history_tokenize_word so that it understands $(...) and the
- <(...) and >(...) expansions as a single word
- - change history_tokenize_word so that it understands extended shell
- globbing patterns as a single word. Code is very similar to
- $(...) code above. Bug reported by Rajeev V. Pillai
- <rajeevvp@gmail.com>
-
- 4/24
- ----
-lib/readline/vi_mode.c
- - add checks to rl_vi_char_search to make sure we've already done a
- search if the command is `;' or `,', and return immediately if we
- have not. Fixes bug reported by Eric Ho <ericmho@shaw.ca>
-
-lib/readline/text.c
- - make sure `dir' is in the valid range before searching in
- _rl_char_search_internal. Range checks in the code depend on it
- being non-zero
-
- 5/3
- ---
-lib/readline/complete.c
- - in rl_complete_internal, if show-all-if-ambiguous or
- show-all-if-unmodified are set (what_to_do == '!' or '@',
- respectively), and the common match prefix is shorter than the
- text being completed, inhibit inserting the match.
- The guess is that replacing text with a shorter match will not
- be wanted
-
- 5/20
- ----
-lib/sh/unicode.c
- - new file, with unicode character conversion-related code. Will be
- used to implement \u and \U escapes where appropriate, and for
- other unicode-related functions in the future
-
- 5/21
- ----
-builtins/printf.def
- - add code to handle \u and \U escapes in format strings and arguments
- processed by the %b format specifier
-
-lib/sh/strtrans.c
- - add code to handle \u and \U escapes as unicode characters, works for
- both `echo -e' and $'...'
-
-doc/{bash.1,bashref.texi}
- - document new \u and \U escape sequences for $'...' and echo (printf
- defers to the system's man page or Posix)
-
- 5/24
- ----
-execute_cmd.c
- - change execute_disk_command to return a status, instead of just
- leaving it in `last_command_exit_value', since the parent's return
- value is sometimes used (e.g., when a restricted shell refuses to
- run a command with a `/'). Fixes bug reported by David Pitt
- <David.Pitt@anz.com>
-
- 5/25
- ----
-bashline.c
- - change bash completion functions to save and restore the value of
- rl_ignore_some_completions_function, and set it to the bash default
- of filename_completion_ignore where appropriate. Fixes bug
- reported by Henning Bekel <h.bekel@googlemail.com>
-
-variables.c
- - new convenience function: find_global_variable (name). Looks for
- NAME in the global variables table, skipping any local and
- temporary environment variables
-
-builtins/declare.def
- - add new -g option to declare/typeset/local, forces variables to be
- created or modified at the global scope when executing inside a
- shell function. Requested by many, most recently by
- konsolebox@gmail.com
-
- 5/27
- ----
-test.c
- - added new `-v var' unary test operator; returns TRUE if var is set
- (i.e., has been assigned a value). Works in both test builtin and
- [[ conditional command
-
-doc/{bash.1,bashref.texi}
- - documented new `-v var' unary conditional operator
-
-tests/test.tests
- - added tests for new -v var operator
-
-builtins/kill.def
- - change kill builtin so -PID (pgrp specification) following a
- -s sig or -n sig option is not interpreted as a signal specification.
- Fixes bug reported by Roman Rakus <rrakus@redhat.com>
-
-builtins/evalstring.c
- - in parse_and_execute, if parse_command() returns non-zero,
- indicating a parse error, exit the shell if the conditions require
- a posix-mode non-interactive shell to abort (parse error in a `.'
- script or eval string). Bash-4.1 only printed a warning. This is
- from Austin Group interp 114
-
-doc/bashref.texi
- - add note to the posix mode section of the texinfo manual noting
- the changed behavior for `.' and `eval'
-
-parse.y
- - change time_command_acceptable to allow TIME token to appear after
- BANG token (to allow `! time foo', which is supposed to be valid)
- - change pipeline_command production to allow multiple instances of
- `!' (which toggle inverting the return status) and `time' (which
- have no effect)
-
-execute_cmd.c
- - In posix mode, `time' without a following pipeline prints the
- elapsed user, system, and real time for the shell and its
- children since the shell was invoked.
- It's like `times' but obeys the setting of TIMEFORMAT. A future
- revision of Posix will require this
-
-doc/{bashref.texi,bash.1}
- - document new posix mode use of `time'
-
-parse.y
- - add production to pipeline_command that permits `!' by itself to
- be equivalent to `false' (and, with the changes above, permits
- `! !' to be roughly equivalent to `true'). A future revision of
- Posix will require this
-
- 5/28
- ----
-parse.y
- - fix \W prompt expansion to use memmove instead of strcpy, since the
- source and target strings overlap (though you think it wouldn't
- matter, since the overlapping regions are never touched at the same
- time). Fixes bug reported by Stéphane Jourdoi
- <sjourdois@gmail.com>
-
-parse.y
- - Posix interp 217 states that $(( must be parsed first as an
- arithmetic expansion, so avoid attempting to parse it as a nested
- command substitution. Fixes bug reported by several, most recently
- <jwm@horde.net>
-
-subst.c
- - change extract_delimited_string to process nested $( as a possible
- command substitution, but only if already parsing an arithmetic
- expansion. Rest of fix for Posix interp 217
- - change parameter_brace_expand_rhs to make the := expansion operator
- perform quote removal and both assign the result to the variable and
- return it as the result of the expansion, rather than assign the
- value after quote removal but return the value before quote removal.
- Posix interp 221
- - introduce new internal quoting flag: Q_DOLBRACE. Denotes a double-
- quoted ${...} expansion. In this case, Posix interp 221 requires
- that a backslash quoting an embedded `}' be removed, even though it's
- not one of the characters marked as special inside double quotes.
- Set in parameter_brace_expand, used by expand_word_internal.
-
-parse.y
- - introduce new parsing state, P_DOLBRACE, set when parsing a ${...}
- expansion
- - set a "dolbrace operator state" in parse_matched_pair to decide
- whether the lexer is reading the param, op, or word in
- ${paramOPword}. Will be used to decide whether or not to treat
- single quotes specially in a double-quoted "${...}
-
- 5/29
- ----
-parse.y
- - change parse_matched_pair so that a single quote appearing in a
- double-quoted ${...} expansion is not special unless the expansion
- operator is `#[#]' or `%[%]'. Posix interp 221
-
-subst.c
- - change string_extract_double_quoted so that a single quote appearing
- in a double-quoted ${...} expansion is not special unless the
- expansion operator is `#[#]' or `%[%]'. Posix interp 221
-
-doc/bashref.texi
- - document posix-mode effects of Posix interp 221
- - add section describing GNU parallel as requested by Stallman
-
-lib/readline/complete.c
- - broke code that compares filenames read from the file system (and
- possibly converted) to words being completed out into a separate
- function: complete_fncmp
- - augment complete_fncmp to treat hyphen and underscore as equivalent
- when comparing filenames if _rl_completion_case_map is set
-
-lib/readline/rlprivate.h
- - new extern declaration for _rl_completion_case_map
-
-lib/readline/util.c
- - change _rl_strnicmp to return the difference between the characters,
- like strcasecmp, and not modify the pointers it is passed
- - change _rl_stricmp to not modify the pointers it is passed
-
-lib/readline/bind.c
- - new bindable variable, "completion-case-map", toggles value of
- _rl_completion_case_map
-
-lib/readline/doc/{rluser.texi,readline.3}
- - document new bindable readline variable "completion-case-map"
-
-execute_cmd.c
- - change execute_function to reset funcnest and jump back to top level
- if funcnest exceeds funcnest_max
- - use funcnest_max as a max function nesting level, if set to numeric
- value greater than 0 (defaults to 0, so inactive)
-
-variables.c
- - new variable FUNCNEST, controls funcnest_max value if set to numeric
- value > 0
-sig.c
- - reset funcnest to 0 when throw_to_top_level occurs
-
-doc/{bash.1,bashref.texi}
- - document FUNCNEST variable and its effect on function execution
-
-lib/readline/funmap.c
- - add new bindable command names to avoid case-insensitive matching
- problems between, for instance, vi-fword and vi-fWord:
-
- vi-forward-word
- vi-forward-bigword
- vi-backward-word
- vi-backward-bigword
- vi-end-word
- vi-end-bigword
-
- Suggested in a different form in 2006 (!) by Servatius Brandt
- <servatius.brandt@arcor.de>
-
-builtins/mapfile.def
- - run_callback now takes a new third argument: curline, the line
- currently being read and about to be assigned
- - the callback function/command now takes an additional argument:
- the line to be assigned to the array index. Feature suggested by
- Dennis Williamson <dennistwilliamson@gmail.com>
-
-doc/{bash.1,bashref.texi}
- - document new additional `line' argument to mapfile callback
-
- 5/30
- ----
-builtins/printf.def
- - add new %(fmt)T format specifier, where FMT is a strftime format.
- Argument is number of seconds since the epoch, with -1 meaning
- current time (roughly date +%s) and -2 meaning shell start time
- (roughly $SECONDS, unless it's been assigned a value or unset).
- Fieldwidth and precision are preserved, strftime result is printed
- as with %[-][[fieldwidth][.[precision]]]s
-
-doc/{bash.1,bashref.texi}
- - document new %(datefmt)T printf format specifier and special
- arguments
-
-builtins/hash.def
- - don't permit programs with slashes to be entered into the hash table
- at all, even with the -p option. Inconsistency pointed out by
- Jan Schampera <jan.schampera@web.de>
-
-builtins/shopt.def
- - add `compat41' option in preparation for bash-4.2
-
- 6/6
- ---
-lib/readline/vi_mode.c
- - finish restructuring rl_vi_domove and the functions that call it so
- it works in callback mode, including numeric arguments. Requested
- a long time ago by Bob Rossi
-
-lib/readline/callback.c
- - arrange to call appropriate callback when readline state indicates
- RL_STATE_VIMOTION, so vi motion commands like `cw' and `d2w' are
- handled in callback mode
-
-lib/sh/wcswidth.c
- - replacement wcswidth implementation
-
-aclocal.m4
- - add REPLACE_FUNCS(wcswidth) to BASH_CHECK_MULTIBYTE
-
-execute_cmd.c
- - fix select_query and print_index_and_element to compute correct
- display width of select list elements in presence of multibyte
- characters. Bug reported by Bernd Eggink <monoped@sudrala.de>
-
-builtins/cd.def
- - add posix-mandated -e option; currently ignored in most circumstances
-
-doc/{bash.1,bashref.texi}
- - document new `cd -e' option
-
- 6/12
- ----
-arrayfunc.c
- - change array_value_internal to treat negative subscripts to indexed
- arrays, offset from array_max_index(x) + 1, so foo[-1] is the last
- element of $foo
-
-subst.c
- - Change verify_substring_values to allow negative length specifications
- when using string variables or array members. Negative lengths
- mean to return characters from OFFSET until (${#var} - N) for
- {var:offset:-N}. Feature requested by Richard Neill
- <rn214@hermes.cam.ac.uk>
-
-doc/{bash.1,bashref.texi}
- - document new behavior of negative subscripts to indexed arrays
- - document new behavior of negative LENGTH in substring expansion
-
-configure.in
- - change version to bash-4.2-devel
-
-variables.c
- - make sure initialize_shell_variables calls sv_xtracefd if
- BASH_XTRACEFD is inherited in the shell environment. Fixes but
- reported by <jsunx1@bellsouth.net>
-
- 6/13
- ----
-lib/readline/complete.c
- - change get_y_or_n to always return 1 when in callback mode, so we
- don't do a blocking read. Have to wait until readline-7.0 to add
- a state so we can use callbacks, since that will change public
- interface
-
- 6/17
- ----
-subst.c
- - fix memory leak in parameter_brace_expand: when performing pattern
- removal with parameter_brace_remove_pattern, make sure `name' is
- freed. Fixes bug reported by oyvindh@dhampir.no
-
- 6/23
- ----
-{parse.y,subst.c}
- - make the ${param//pat/rep}, ${param^pat}, and ${param,pat} expansions
- require single quotes and double quotes to match when within double
- quotes. This way every expansion except the Posix ones behaves as
- bash has always behaved
-
-subst.c
- - change remove_upattern and remove_wpattern to return their first
- argument if nothing matches, change callers to allocate memory
- appropriately
- - change remove_pattern to short-circuit and return copy of PARAM
- if remove_wpattern returns its first argument (indicating no match)
- rather than convert back to multibyte string, allocating new memory
- twice and calling wcsrtombs
-
- 6/24
- ----
-execute_cmd.c
- - add missing initializers for sh_coproc to eliminate a compiler
- warning. Patch from Werner Fink <werner@suse.de>
-
- 6/27
- ----
-parse.y
- - add `TIMEIGN' token to handle `time -p -- ...'. Pointed out by
- Laszlo Ersek <lacos@caesar.elte.hu> on austin-group list
-
- 6/28
- ----
-jobs.c
- - treat a shell with (subshell_environment&SUBSHELL_PIPE) != 0 like
- a command substitution in wait_for and act like we received a
- SIGINT if a job we're waiting for dies of SIGINT. Fixes bug
- reported by Ilya Basin <basinilya@gmail.com>
-
- 7/2
- ---
-jobs.c
- - if fork() fails in make_child, try to reap some dead children before
- retrying
-
-execute_cmd.c
- - change execute_pipeline to run the last command of a non-asynchronous
- pipeline in the current shell environment if the `lastpipe' shell
- option is enabled and job control is not active. Code from
- Werner Fink <werner@suse.de>
-
-parse.y
- - Posix says (issue 267) that time is not recognized as a keyword
- if the next token begins with a `-'
-
-doc/{bash.1,bashref.texi}
- - changed the descriptions of BASH_SOURCE, BASH_LINENO, and FUNCNAME
- as proposed in Ubuntu bug 591677.
- - document new `lastpipe' shell option that runs last command of a
- pipeline in the current shell environment
- - document new posix-mode behavior with `time -p'
-
- 7/5
- ---
-aclocal.m4
- - new autoconf test WEXITSTATUS_OFFSET, bit offset in status word
- returned by wait() of the process's exit status
-
-jobs.[ch]
- - change stop_pipeline to return the actual index of the job just
- created and added to the jobs table, instead of the current job
- - job_exit_status and job_exit_signal are now global functions, with
- extern declarations in jobs.h
- - append_process: new utility function for use by the lastpipe code,
- takes info, creates a PROCESS from them, and adds it to the end of
- the passed job id's pipeline. lastpipe code uses it to add a dummy
- process for the last command in the pipeline
- - freeze_jobs_list: new utility function so rest of shell can freeze
- the jobs list. Used by the lastpipe code
-
-execute_cmd.c
- - changes to lastpipe code to make `pipefail' option, $PIPESTATUS, and
- $? work correctly. Uses append_process and job_exit_status
-
- 7/10
- ----
-subst.c
- - when performing pattern substitution word expansions, a `&' in the
- replacement string is replaced by the text matched by the pattern.
- The `&' can be quoted with a backslash to inhibit the expansion.
- CURRENTLY DISABLED
-
- 7/13
- ----
-pcomplib.[ch]
- - new member for struct compspec: lcommand. for future use
-
- 7/15
- ----
-parse.y
- - fix problem in parse_comsub where extra space was added to here-doc
- delimiter if the first word in the comsub contained a `/'. Fixes
- bug reported by Alex Khesin <alexk@google.com>
-
- 7/20
- ----
-parse.y
- - change reserved_word_acceptable to return success if the last two
- tokens read were `function WORD'. Allows function definitions like
- function good [[ -x foo ]];. Fixes bug reported by Linda Walsh
- <bash@tlinx.org>
-
-doc/{bash.1,bashref.texi}
- - change function definition meta-syntax to make it clearer, rather
- than let the text note the optional portions
-
- 7/24
- ----
-bashhist.c
- - change bash_history_inhibit_expansion() to suppress history expansion
- for $! parameter expansion. Fixes debian bug #589745 submitted by
- Frank Heckenbach <f.heckenbach@fh-soft.de>
-
-lib/readline/terminal.c
- - change rl_resize_terminal to always fetch the new terminal size and
- only force the redisplay if _rl_echoing_p is non-zero. Fixes bug
- reported by Balazs Kezes <rlblaster@gmail.com>
-
- 7/25
- ----
-lib/readline/xfree.c
- - new file, contains definition of xfree moved from xmalloc.c
-
- 7/28
- ----
-variables.c
- - check suspect return values from bind_variable before trying to use
- the returned SHELL_VAR *. Changes to: initialize_shell_variables,
- bind_int_variable, FIND_OR_MAKE_VARIABLE. Fixes bug reported by
- Roman Rakus <rrakus@redhat.com>
-
- 7/31
- ----
-lib/readline/rltty.c
- - fix rl_prep_terminal and rl_deprep_terminal to use fileno(stdout)
- if rl_instream is NULL. Fixes bug reported by Otto Allmendinger
- otto.allmendinger@googlemail.com
-
- 8/2
- ---
-lib/sh/casemod.c
- - if the passed string is NULL or empty, return it immediately. Fixes
- bug reported by Dennis Williamson <dennistwilliamson@gmail.com>
-
-subst.c
- - fix pat_subst to cope with the passed string being NULL
-
-arrayfunc.h
- - added flag values for array_value_internal and its callers; converted
- array_value_internal `allow_all' parameter into a general flags word
- - get_array_value now takes a flags value
- - changed array_value internal to use *indp as an index to use if the
- AV_USEIND flag is set, rather than recomputing it
-
-subst.c
- - get_var_and_type takes two new parameters: a flags word and an index
- that represents an already-computed index for an array reference
- (just indexed arrays so far). Index is used and passed to array_value
- if flags includes AV_USEIND
- - parameter_brace_expand_word takes a new argument: the already-
- computed index; returns W_ARRAYIND if word expanded is being used
- as an array index
- - changed parameter_brace_casemod, parameter_brace_patsub,
- parameter_brace_substring, parameter_brace_remove_pattern to take new
- flags and index arguments from parameter_brace_expand_word. They
- pass the new parameters along to get_var_and_type to use an
- already-computed array index if necessary. Fixes bug where array
- indexes are computed twice reported by Andrew Benton
- <b3nton@gmail.com>
-
-doc/bash.1,lib/readline/doc/{history.3,hsuser.texi}
- - modified description of history event designators to clarify that
- all non-absolute event designators are relative to the current
- position in the history list. Question raised by Frank
- Heckenbach <f.heckenbach@fh-soft.de> as debian bash bug 590012
-
- 8/5
- ---
-subst.c
- - remove code that does not add a quoted null when the input string
- is partially quoted; subsequent word splitting may require it.
- Fixes bug reported by Eric Blake <eblake@redhat.com>
-
- 8/12
- ----
-lib/glob/gmisc.c
- - move match_pattern_wchar and match_pattern_char to new file in
- glob library
- - new functions: wmatchlen(pat, max) and umatchlen(pat, max), computes
- number of characters PAT will match. Returns the number of chars
- that will be matched or -1 if the match length is indeterminate
- (i.e., contains a `*')
-
-subst.c
- - use umatchlen/wmatchlen in match_upattern/match_wpattern to bound
- the number of match attempts in large strings to (usually) one,
- depending on match length. Fixes performance problems with
- pattern substitution in large strings noted by Yi Yan
- <yiyan97@hotmail.com>. Can be applied to remove_[uw]pattern also
-
- 8/13
- ----
-bashhist.c
- - in maybe_append_history, change check for history_lines_this_session
- so that we append the lines to the file if it's equal to the value
- returned by where_history(). This means that without this change,
- the history won't be appended if all the lines in the history list
- were added in the current session since the last time the history
- file was read or written. Fixes bug reported by Bruce Korb
- <bruce.korb@gmail.com>
-
-shell.h,parse.y
- - add prompt_string_pointer to the parser_state struct saved and
- restored by {save,restore}_parser_state. Fixes both bugs exposed
- by bash_completion and completion of open backquotes reported by
- Egmont Koblinger <egmont@gmail.com>
-
-subst.h
- - new flag for skip_to_delim: SD_EXTGLOB. Skip extended globbing
- patterns while looking for ending delimiter
-
-subst.c
- - when passed the SD_EXTGLOB flag, skip_to_delim skips over extended
- globbing patterns (when extended_glob is set) while looking for a
- character in the delimiter set
-
-pathexp.c
- - split_ignorespec: new function to replace calls to extract_colon_unit
- in setup_ignore_patterns. uses skip_to_delim with the SD_EXTGLOB
- flag to skip over extended globbing patterns in variables like
- HISTIGNORE and GLOBIGNORE. Fixes bug reported by Dimitar DIMITROV
- <mitkofr@yahoo.fr> and Greg Wooledge <wooledg@eeg.ccf.org>
-
- 8/28
- ----
-lib/readline/rlprivate.h
- - add members to search_cxt to save _rl_keymap
- - new flag for isearch context: SF_CHGKMAP, set if we changed the
- keymap while reading a character for the search string that
- translated to a command
-
-lib/readline/isearch.c
- - save current readline keymap in cxt->keymap and cxt->okeymap
- in _rl_scxt_alloc
- - in _rl_isearch_dispatch, only check for cxt->lastc as a member of
- cxt->search_terminators if it's > 0 (i.e., not an isearch opcode)
-
- 9/3
- ---
-support/signames.c
- - add Solaris SIGJVM1 and SIGJVM2. Update from Stefan Teleman
- <stefan.teleman@oracle.com>
-
-shell.c
- - instead of closing all fds 3-20 at shell startup, just set them to
- be close-on-exec. Report from Rainer Müller<raimue@macports.org>
-
-lib/readline/isearch.c
- - in _rl_isearch_dispatch, if the current character maps to ISKMAP,
- move to the indicated keymap (using cxt->keymap) and go on to
- read another character. Fixes problem reported by Davor
- Cubranic <cubranic@stat.ubc.ca>
- - in _rl_isearch_dispatch, after translating key to possible opcode,
- restore _rl_keymap from cxt->okeymap if necessary
- - in _rl_isearch_dispatch, use key sequences that map to default
- functions that ^G, ^W, and ^Y map to as equivalent to those chars
-
-lib/readline/complete.c
- - new variable, _rl_menu_complete_prefix_first, zero by default
- - change menu_complete to display common prefix (matches[0]) first
- before cycling through rest of match list if
- _rl_menu_complete_prefix_first is non-zero. Suggested by Sami
- Pietila <sami.pietila@gmail.com>
-
-lib/readline/bind.c
- - new bindable readline variable, "menu-complete-display-prefix",
- controls setting of _rl_menu_complete_prefix_first
-
-doc/{bash.1,bashref.texi},lib/readline/doc/{readline.3,rluser.texi}
- - added description of menu-complete-display-prefix bindable
- readline variable
-
- 9/17
- ----
-configure.in
- - remove AM_PATH_LISPDIR call since we don't use that bash debugger
- any more. Suggested by Mike Frysinger <vapier@gentoo.org>
-
- 10/6
- ----
-findcmd.c
- - change executable_file to set errno to EISDIR if the passed name
- is a directory
-
-builtins/exec.def
- - change exec_builtin to report appropriate error message if the
- file argument is a directory. Noted by Eric Blake <eblake@redhat.com>
- in a message to austin-group
-
-builtins/source.def
- - change source_builtin to make sure the shell exits if the file is
- not found when in a non-interactive shell running in posix mode
- and source_searches_cwd == 0 (as posix mode makes it by default).
- Pointed out in http://thread.gmane.org/gmane.comp.shells.dash/291/focus=392
- by Jilles Tjoelker <jilles@stack.nl>
-
-execute_cmd.c
- - set executing_command_builtin in execute_builtin if the builtin is
- command_builtin. Unwind-protected in execute_function_or_builtin
- (like executing_builtin variable). Available for rest of shell
-
-builtins/{source.def,evalfile.c}
- - make sure that non-interactive posix mode shells exit if the file
- argument to `.' is not found only if they are not being executed
- by the command builtin (executing_command_builtin == 0). This is
- how `command' can cancel effects of special builtin exit properties
- in the case of `dot file not found'
-
- 10/13
- -----
-lib/sh/strtrans.c
- - pass \c through unchanged if not escaping for `echo -e' and they are
- the final two characters in the string
-
- 10/15
- -----
-subst.c
- - extract_dollar_brace_string: fix problem with single quotes
- in unquoted ${...} for Posix compliance
-
- 10/16
- -----
-builtins/exec.def
- - catch return value from shell_execve; don't print duplicate error
- message if return value is EX_NOTFOUND. Make sure exit status
- from exec is 127 if command is not found
-
-execute_cmd.c
- - fix typo (`saved_redirects' should be `saved redirects') in
- execute_function_or_builtin `command exec' case. Typo caused
- too much of the unwind-protect stack to be discarded
- - in same execute_function_or_builtin case, don't discard the
- `saved redirects' frame unconditionally; only discard it if
- saved_redirects is non-null in the `command exec' case. Fixes
- sh -c 'command exec; exit 1' hanging bug uncovered by FreeBSD
- sh test cases
-
- 10/18
- -----
-subst.c
- - when in posix mode, shell should not exit if a variable assignment
- error (e.g., assigning to readonly variable) occurs preceding a
- command that is not a special builtin. Fixes bug uncovered by
- FreeBSD sh test cases
- - when in posix mode, the ${!?} and ${!#} expansions are not indirect
- expansions, but posix word expansions involving the `!' variable
-
-parse.y
- - fix parse_comsub so that it does not skip backslash-newline when
- parsing a comment
-
- 10/19
- -----
-subst.c
- - fix parameter_brace_expand so that an attempt to use the % or #
- expansions on an unset variable with -u set will cause a non-
- interactive shell to abort. Posix change
- - fix parameter_brace_expand so that an attempt to use pattern
- substitution or case modification expansions on an unset variable
- with -u set will cause and unbound variable error and make a
- non-interactive shell abort
- - change parameter_brace_expand_length to return INTMAX_MIN if a
- positional parameter is unset and -u is set
- - if parameter_brace_expand_length returns INTMAX_MIN when -u is set,
- treat it as an unbound variable error and make a non-interactive
- shell abort. Posix change
- - change parameter_brace_expand_length to return INTMAX_MIN if an
- implicit reference to array[0] is made ${#array} and array[0] is
- not set when -u is set
-
- 10/20
- -----
-builtins/cd.def
- - Posix 2008 says that if no matching directories are found in $CDPATH,
- use the directory name passed as an operand and go on. Posix change
-
-doc/bashref.texi
- - change Posix mode section with latest additions and removals
-
- 11/4
- ----
-lib/readline/complete.c
- - fix rl_menu_complete and rl_old_menu_complete to keep incrementing
- match_list_index by match_list_size as long as it's < 0. Fixes
- bug reported by jeenuv@gmail.com
-
-braces.c
- - make mkseq() take intmax_t arguments for sequence start and end
- and make sure it's passed intmax_t values. Fixes bug reported by
- Pete Gregory <pg@bushlitt.org>
-
-sig.c
- - if termsig_handler is called when terminate_immediately == 1,
- assume we're being called as a signal handler and set
- history_lines_this_session to 0 to inhibit history file being
- written on shell exit. Fixes long-standing bug most recently
- observed by Andreas Schwab <schwab@linux-m68k.org>
-
- 11/5
- ----
-redir.c
- - add_undo_close_redirect now returns int, 0 on success, non-zero on
- failure. Currently always succeeds
- - new macro REDIRECTION_ERROR to make do_redirection_internal return
- value of errno
- - change do_redirection_internal to call REDIRECTION_ERROR after
- saving file descriptor and make do_redirection_internal return error
- if add_undo_redirect or add_undo_close redirect fails. This makes
- failure to save a file descriptor a redirection error and the shell
- behaves appropriately. Fixes bug reported by Eric Blake
- <eblake@redhat.com>
-
-bashline.c
- - modify bash_forward_shellword to correctly handle quoted strings,
- especially if point is in a quoted string when function is invoked.
- Fixes bug reported by Daniel Colascione <dan.colascione@gmail.com>
-
-configure.in
- - change version to 4.2-alpha
-
- 11/7
- ----
-lib/readline/text.c
- - in rl_insert, if we're not in the multibyte code path, don't try to
- optimize and insert all of the available typeahead input if we're
- reading input from a macro. Fixes bug reported by Andre Majorel
- <aym-ung@teaser.fr>
-
-lib/readline/text.c
- - break out multibyte guts of rl_forward_char into a separate function
- _rl_forward_char_internal that does nothing but calculate the new
- value of point
- - change rl_forward_char to call _rl_forward_char_internal instead of
- having equivalent code inline
-
-lib/readline/rlprivate.h
- - new extern declaration for _rl_forward_char_internal
-
-lib/readline/vi_mode.c
- - change _rl_vi_append_forward to call _rl_forward_char_internal to
- set rl_point, instead of calling rl_forward_char. When at the end
- of the line, rl_forward_char will ring the bell. Fixes debian
- bash bug 601042, reported by Alan J. Greenberger <alanjg@ptd.net>
-
- 11/14
- -----
-subst.c
- - fix match_upattern to use correct test to immediately break out of
- loop (when potential match length is greater than number of chars
- remaining in the string) in MATCH_ANY case
-
- 11/15
- -----
-subst.c
- - include "typemax.h" to make sure we have a definition of INTMAX_MIN
-
- 11/16
- -----
-lib/sh/unicode.c
- - make sure `localconv' isn't declared on machines without iconv
- - add stub_charset for systems that don't have locale_charset: looks
- up LC_CTYPE, returns everything after last `.', "UTF-8" if the
- value is exactly "UTF-8", and "ASCII" otherwise
-
- 11/20
- -----
-lib/readline/vi_mode.c
- - in rl_domove_motion_callback, make sure to use m->key instead of
- key, which is not initialized and should not be used. Bug report
- from Andreas Schwab <schwab@linux-m68k.org>
- - in rl_vi_domove, make assignment to `m' explicit instead of
- relying on evaluation order semantics, since the C standard leaves
- them unspecified. Bug report from Andreas Schwab
- <schwab@linux-m68k.org>
-
- 11/21
- -----
-lib/sh/shquote.c
- - sh_single_quote and sh_double_quote now take a const char *
- argument. Fixes problem pointed out by Joachim Schmitz
- <jojo@schmitz-digital.de>
-
-externs.h
- - change extern declarations for sh_single_quote and sh_double_quote
-
-lib/sh/strchrnul.c
- - make sure that return value is cast to (char *) if we're using a
- part of the passed (const char *) argument. Fixes problem pointed
- out by Joachim Schmitz <jojo@schmitz-digital.de>
-
-lib/glob/gmisc.c
- - fix a typo that mixed up defines for LPAREN and RPAREN. Bug and
- fix from Andreas Schwab <schwab@linux-m68k.org>
- - use WLPAREN and WRPAREN in multibyte character environments
- - fixed typos using L'cc' in a non-wide-char environment
-
-lib/readline/complete.c
- - fix rl_filename_completion_function to dequote users_dirname if
- there is a filename dequoting function (as well as dirname), since
- users_dirname gets tacked back onto the beginning of the possible
- completions and then requoted. Bug reported by Andreas Schwab
- <schwab@linux-m68k.org>
-
- 11/22
- -----
-lib/readline/parens.c
- - the `blink-matching-paren' variable should default to off
-
- 11/23
- -----
-subst.h
- - add extern declaration for close_new_fifos()
-
-lib/sh/fnxform.c
- - fix curencoding to return the character past the `.', not a string
- beginning with `.'
-
-lib/sh/unicode.c
- - fix stub_charset to do the same cut-off at `@' as curencoding().
- These two functions should be combined
-
-builtins/printf.def
- - document new %(datefmt)T modifier in help text
-
- 11/24
- -----
-parse.y
- - fix `W' case in decode_prompt_string: memmove was copying one too
- few bytes and missed the closing NUL. Bug report from Tim Mooney
- <Tim.Mooney@ndsu.edu>
-
- 11/26
- -----
-subst.c
- - in expand_word_internal, don't add quoted nulls to partially-
- quoted strings if the word will not be subjected to word splitting
- later (which will remove the quoted null). Fixes bug reported by
- Rocky Bernstein <rocky.bernstein@gmail.com>
-
- 11/28
- -----
-subst.c
- - change multibyte case of match_pattern to revert to match_upattern
- if neither the pattern nor the string has any multibyte characters
-
-alias.c
- - fix tests of backslash-escaped characters in skipquotes, skipws,
- rd_token to check for backslash at EOS and not go past the end.
- Fixes debian bug 603696 reported by Tim Small <tim@buttersideup.com>
-
-include/shmbchar.h
- - new file, mbchar.h from gnulib minus the <stdbool.h> include
-
-lib/sh/shmbchar.c
- - new file, mbchar.c from gnulib with additions
- - moved mbstrlen from subst.c to here, changed initialization of mbs
- - change mbstrlen to use is_basic to avoid calls to mbrlen for ASCII
- chars; code hints from gnulib
- - don't copy mbs and mbsbak if we're not calling mbrlen
-
- 11/29
- -----
-lib/glob/smatch.c
- - change xstrmatch to use internal_strmatch() if the pattern and
- string don't have any multibyte characters
-
- 11/30
- -----
-include/shmbutil.h
- - change ADVANCE_CHAR and ADVANCE_CHAR_P macros to use is_basic and
- only call mbrlen and copy state and state_bak if is_basic returns
- false (non-ASCII). Called all over the place.
- - change rest of macros except BACKUP_CHAR and BACKUP_CHAR_P in the
- same way
-
- 12/2
- ----
-subst.c
- - audit all calls to string_list and make sure caller can handle a
- NULL return value. Fixes bug reported by David Rochberg
- <rochberg@google.com>
-
-general.h
- - change sh_wassign_func_t to take an additional argument: an int
- flags word
-
-subst.c
- - change do_word_assignment to take an additional argument to match
- wassign_func_t; change callers
- - change call to (*assign_func) in expand_word_list_internal to match
- new wassign_func_t prototype
- - (*assign_func) passes 1 as additional arg if the simple command is
- a builtin or function, in which case the assignment to the
- temporary env should take effect
-
-variables.c
- - change assign_in_env to take an additional argument to match
- wassign_func_t; change callers
- - move call to sv_ifs from dispose_temporary_env to
- dispose_used_env_vars; we don't need to do it if called from
- merge_temporary_env
-
- 12/3
- ----
-variables.c
- - change dispose_temporary_env to maintain a list (tempvar_list) of
- variables that need to be handled specially. If a variable that
- gets freed by push_temp_var or propagate_temp_var is one of the
- variables that the shell handles specially (IFS, LANG, etc.), it's
- stored on the list. For each variable in this list,
- dispose_temp_var calls stupidly_hack_special_variables.
- - assign_in_env calls stupidly_hack_special_variables if flags arg
- is non-zero, so variable assignments affect current shell
- execution environment if a builtin or function is being executed.
- Fixes bug reported by Bruno Haible <bruno@clisp.org>
-
- 12/5
- ----
-subst.c
- - use mbsmbchar on both string and pattern in match_pattern instead
- of strlen and mbstrlen; only go through the strings once
-
- 12/6
- ----
-lib/readline/kill.c
- - in rl_yank_last_arg, only switch directions if the `count'
- argument is < 0, not < 1. This makes explicit count arguments of
- 0 work as expected. Fixes bug reported by Dennis Williamson
- <dennistwilliamson@gmail.com>
-
-doc/bash.1,lib/readline/doc/{readline.3,rluser.texi}
- - fix documentation for yank-last-arg to make it clear how the count
- argument is set and how second and subsequent calls treat any
- numeric argument
-
-doc/{bash.1,bashref.texi}
- - slight changes to the description of test
- - change \(bv to `|'; it seems that many `internationalized' versions
- of groff don't render that as a vertical bar. Fixes Debian bug
- 603805
-
- 12/10
- -----
-configure.in
- - changed release status to 4.2-beta
-
- 12/14
- -----
-[bash-4.2-beta frozen]
-
- 12/18
- -----
-redir.c
- - change REDIRECTION_ERROR macro to accept a third argument: an
- additional file descriptor to close before returning and error (pass
- -1 to do nothing)
- - change calls to REDIRECTION_ERROR to close appropriate file
- descriptors. Fixes bug reported by Andreas Schwab
- <schwab@linux-m68k.org>
- - make sure to close any file descriptors opened for REDIR_VARASSIGN
- before returning an error
-
- 12/19
- -----
-expr.c
- - move processing of unary `-' and `+' to exp1 from exp0 to avoid
- precedence problems. Fixes bug reported by <12bric@gmail.com>
-
- 12/22
- -----
-lib/sh/fpurge.c
- - updated version from gnulib, inlined gnulib stdio-impl.h
-
- 12/24
- -----
-doc/bash.1
- - change the description of while and until to use `list-1' and
- `list-2', similar to the Posix description. Suggested by
- Jeff Haemer <jeffrey.haemer@gmail.com>
-
- 12/27
- -----
-execute_cmd.c
- - slight changes to execute_command_internal and how it captures the
- exit status of (command) and shell control structures with pipes to
- avoid multiple variable assignments to last_command_exit_value
- - change to execute_simple_command so that parent branches of shells
- forked to execute commands in pipelines don't change $? to 0
- (if (pipe_out != NO_PIPE) result = last_command_exit_value). Fixes
- bug reported by Damien Nadà <dnade.ext@orange-ftgroup.com>
-
- 12/28
- -----
-configure.in
- - changed version to bash-4.2-rc1
-
- 1/2/2011
- --------
-lib/readline/complete.c
- - fix rl_filename_completion_function to dequote and save users_dirname
- before calling any function to transform the directory name passed
- to opendir(). Fix from Andreas Schwab <schwab@linux-m68k.org>
-
-lib/readline/doc/
- - make sure to note that rl_directory_completion_hook cannot modify
- the directory name argument if it returns 0
-
-bashline.c
- - make sure that bash_directory_completion_hook consistently returns
- non-zero whenever it modifies its directory name argument
-
-lib/readline/terminal.c
- - don't bother with the declarations (extern or not) for PC, BS, and
- UP if NCURSES_VERSION is defined, since ncurses defines local
- versions of those symbols in the library. Fixes bug most recently
- reported by Kevin Scott <kscott@eznet.net> against Mac OS X
-
-include/filecntl.h
- - make sure O_TEXT and O_BINARY are defined to avoid Windows-specific
- (or cygwin-specific) code. This and the following changes from
- Eric Blake <eblake@redhat.com> for current cygwin systems
-
-input.h
- - add a B_TEXT flag to note when the underlying file descriptor is
- opened in O_TEXT mode
-
-lib/sh/tmpfile.c
- - make sure temporary files are opened in binary mode (O_BINARY) on
- systems where it matters
-
-input.c
- - make sure to set the B_TEXT flag if the file descriptor has O_TEXT
- in its flags (returned by fcntl)
- - change b_fill_buffer to compensate for lseek() and read() returning
- different offsets on files opened in O_TEXT mode
- - cygwin now is able to lseek on files and set the unbuffered and text
- flags appropriately, so can use the general test for a seekable fd
- - now that cygwin uses O_TEXT or O_BINARY appropriately, we no longer
- have to manually translate \r\n to \n
-
-redir.c
- - remove the Cygwin-1.1 code from here_document_to_fd; cygwin is now
- up to version 1.7 and can unlink an open file descriptor
- - make sure temporary files used for here documents are opened in
- binary mode (O_BINARY) on systems where it matters
-
-execute_cmd.c,parse.y
- - make sure error messages use all printable characters in filenames
- and strings
-
-{builtins/evalfile,shell,subst}.c
- - remove cygwin-specific calls to setmode to force file descriptors
- into text mode, since we're using text or binary mode according to
- the mode of the mount point
-
-execute_cmd.c
- - when creating pipes and making them stdin and stdout, make sure to
- tell stdio that the mode of the underlying file descriptor may have
- changed from text to binary
-
-subst.c
- - when creating pipes for command substitution, make sure to
- tell stdio that the mode of the underlying file descriptor may have
- changed from text to binary
-
- 1/3
- ---
-doc/{bash.1,bashref.texi}
- - changes to the readonly documentation suggested by Jan Schampera
- <jan.schampera@web.de>
-
- 1/4
- ---
-builtins/read.def
- - change bind_read_variable to consistently return NULL if there is some
- kind of variable assignment error (e.g., assigning to a readonly or
- noassign var)
- - change read builtin to only call stupidly_hack_special_variables if
- bind_read_variable returns non-NULL
- - change read_builtin to return EXECUTION_FAILURE if there is an
- assignment error (e.g., assigning to a readonly or noassign var).
- Fixes bug reported by Jan Schampera <jan.schampera@web.de>
-
- 1/5
- ---
-builtins/{help.def,common.c}
- - change uses of a builtin's `short_doc' member to go through gettext
- for possible translation before being displayed. Suggestion from
- <goeran@uddeborg.se>
-
- 1/6
- ---
-shell.h
- - new exit status define: EX_MISCERROR (2)
-
-builtins/getopts.def
- - change getopts_bind_variable to return error if an attempt is made
- to assign to a variable with the `noassign' attribute
- - change getopts_bind_variable to return EX_MISCERROR if attempt is
- made to assign to readonly or noassign variable
-
-builtins/cd.def
- - change setpwd to return an int and return failure when PWD is
- readonly; success otherwise
- - change bindpwd to return failure if setpwd returns EXECUTION_FAILURE.
- Inspired by message from Eric Blake <eblake@redhat.com>
- - change pwd builtin to return failure if PWD is readonly (and setpwd
- returns EXECUTION_FAILURE)
-
- 1/8
- ---
-lib/sh/eaccess.c
- - on FreeBSD and Solaris, check the result of access(2) with mode X_OK
- for root by checking sh_stataccess(). Same code as was added to
- check result of eaccess(). Fixes Solaris 11 problem reported by
- <cloyce@headgear.org>
-
- 1/10
- ----
-builtins/set.def
- - add description of `--' to help text
-
-[bash-4.2-rc1 released]
-
- 1/14
- ----
-lib/readline/readline.h
- - fix/update description of rl_directory_rewrite_hook
-
-lib/readline/complete.c
- - if there are no directory rewrite or completion hooks, set dirname
- to a duplicate copy of users_dirname instead of calling the
- dequoting function again
-
-bashline.c
- - use rl_directory_rewrite_hook instead of rl_directory_completion_hook
- to avoid changing the directory name the user typed, other than
- dequoting it. Fixes bug introduced by changes to directory
- completion hook, pointed out first by William Bader
- <william.bader@gmail.com>
-
- 1/16
- ----
-lib/sh/strftime.c
- - portability and other (int->long) updates from Aharon Robbins
- <arnold@skeeve.com>
-
-configure.in
- - change release level to rc2
-
- 1/17
- ----
-execute_cmd.c
- - short-circuit select builtin if read_builtin returns anything but
- EXECUTION_SUCCESS, not just EXECUTION_FAILURE. Fixes bug reported
- by Pierre Gaston <pierre.gaston@gmail.com>
-
- 1/19
- ----
-execute_cmd.c
- - change execute_simple_command to save and restore the values of
- executing_builtin and executing_command_builtin before discarding
- the unwind-protect frame. Bug and fix from Werner Fink
- <werner@suse.de>
-
- 1/24
- ----
-variables.c
- - change brand to set rseed to a known, constant value if it's 0,
- so the sequence is known. Fixes issue reported by Olivier
- Mehani <shtrom@ssji.net>
-
- 2/2
- ---
-braces.c
- - make sure to pass an `int' argument to asprintf in mkseq. Fixes
- bug reported by Mike Frysinger <vapier@gentoo.org>
-
- 2/5
- ---
-lib/glob/gmisc.c
- - fix wmatchlen and umatchlen to initialize all state variables. Fix
- from Andreas Schwab <schwab@linux-m68k.org>
-
-jobs.c
- - change wait_for to call restore_sigint_handler right after exiting
- the wait loop, instead of right before function returns. Reduces
- the window for a SIGINT to be lost because a child does not exit
- due to SIGINT
-
- 2/7
- ---
-configure.in
- - changed release status to `release'
-
- 2/9
- ---
-execute_cmd.c
- - make sure some variables are declared as volatile if necessary. Bug
- report and fix from Eric Blake <eblake@redhat.com>
-
-[bash-4.2 frozen]
-
- 2/11
- ----
-print_cmd.c
- - in indirection_level_string, change to simpler test of result of
- MBLEN (< 0 instead of MB_INVALIDCH)
-
- 2/14
- ----
-[bash-4.2 released]
-
- 2/15
- ----
-lib/glob/gmisc.c
- - fix wmatchlen and umatchlen to avoid going past the end of the
- string on an incomplete bracket expression that ends with a
- NUL. Partial fix for bug reported by Clark Wang <dearvoid@gmail.com>
-
- 2/16
- ----
-subst.h
- - new string extract flag value: SX_WORD. Used when calling
- extract_dollar_brace_string to skip over the word in
- ${param op word} from parameter_brace_expand
-
-subst.c
- - change parameter_brace_expand to add SX_WORD to flags passed to
- extract_dollar_brace_string
- - change parameter_brace_expand to use SX_POSIXEXP for all non-posix
- word expansion operators that treat single quotes as special, not
- just % and #
- - change extract_dollar_brace_string to initialize dolbrace_state to
- DOLBRACE_WORD if SX_WORD flag supplied and we shouldn't use
- DOLBRACE_QUOTE. Fixes bug reported by Juergen Daubert <jue@jue.li>
-
-doc/{bash.1,bashref.texi}
- - document the exact expansions here strings undergo
-
- 2/17
- ----
-lib/readline/vi_mode.c
- - make sure that `dd', `cc', and `yy' call vidomove_dispatch from
- rl_domove_read_callback. Fixes bug reported by Clark Wang
- <dearvoid@gmail.com>
-
-lib/readline/callback.c
- - make sure _rl_internal_char_cleanup is called after the
- vi-motion callbacks (rl_vi_domove_callback) in rl_callback_read_char.
- Companion to above fix
-
-doc/{bash.1,bashref.texi}
- - make sure that the text describing the rhs of the == and =~
- operators to [[ states that only the quoted portion of the pattern
- is matched as a string
-
- 2/18
- ----
-lib/glob/gmisc.c
- - better fix for umatchlen/wmatchlen: keep track of the number of
- characters in a bracket expression as the value to increase
- matchlen by if the bracket expression is not well-formed. Fixes
- bug reported by Clark Wang <dearvoid@gmail.com>
-
-subst.c
- - change expand_string_for_rhs so that it sets the W_NOSPLIT2 flag
- in the word flags. We will not perform word splitting or quote
- removal on the result, so we do not want to add quoted nulls if
- we see "" or ''. Fixes bug reported by Mike Frysinger
- <vapier@gentoo.org>
-
- 2/19
- ----
-variables.c
- - new function, int chkexport(name), checks whether variable NAME is
- exported and remakes the export environment if necessary. Returns
- 1 if NAME is exported and 0 if not
- - call chkexport(name) to get tzset to look at the right variable in
- the environment when modifying TZ in sv_tz. Don't call tzset if
- chkexport doesn't indicate that the variable is exported
-
-variables.h
- - new extern declaration for chkexport
-
-
-{parse.y,builtins/printf.def}
- - call sv_tz before calling localtime() when formatting time strings
- in prompt strings or using printf. Fixes bug reported by
- Dennis Williamson <dennistwilliamson@gmail.com>
-
-execute_cmd.c
- - modify fix of 2/9 to add casts when those variables are passed to
- functions; some compilers throw errors instead of warnings. Report
- and fix from Joachim Schmitz <jojo@schmitz-digital.de>
-
-support/shobj-conf
- - add a stanza for nsk on the Tandem from Joachim Schmitz
- <jojo@schmitz-digital.de>
-
-{shell,lib/readline/shell}.c
- - Tandem systems should use getpwnam (getlogin()); for some reason
- they don't do well with using getuid(). Fix from Joachim Schmitz
- <jojo@schmitz-digital.de>
-
- 3/1
- ---
-variables.c
- - make sure that the return value from find_variable is non-null
- before trying to use it in chkexport. Fixes bug reported by
- Evangelos Foutras <foutrelis@gmail.com>
-
- 3/3
- ---
-parse.y
- - when adding $$ to the current token buffer in read_token_word(),
- don't xmalloc a buffer for two characters and then strcpy it, just
- copy the characters directly into the token buffer. Fix from
- Michael Whitten <mfwitten@gmail.com>
-
-execute_cmd.c
- - fix expand_word_unsplit to add the W_NOSPLIT2 flag to the word to
- be expanded, so "" doesn't add CTLNUL. Similar to fix of 2/18 to
- expand_string_for_rhs. Fixes bug reported by Nathanael D. Noblet
- <nathanael@gnat.ca> and Matthias Klose <doko@debian.org>
-
-parse.y
- - fix extended_glob case of read_token_word to allocate an extra
- space in the buffer for the next character read after the extended
- glob specification if it's a CTLESC or CTLNUL. Report and fix from
- Michael Witten <mfwitten@gmail.com>
- - fix shell expansions case of read_token_word to allocate an extra
- space in the buffer for the next character read after the shell
- expansion if it's a CTLESC or CTLNUL. Report and fix from
- Michael Witten <mfwitten@gmail.com>
- - TENTATIVE: fix read_token_word to reduce the amount of buffer space
- required to hold the translated and double-quoted value of $"..."
- strings. Report and fix from Michael Witten <mfwitten@gmail.com>
- - change code around got_character and got_escaped_character labels to
- make sure that we call RESIZE_MALLOCED_BUFFER before adding the
- CTLESC before a CTLESC or CTLNUL, and before adding the character if
- we're not adding a CTLESC. Report and fix from
- Michael Witten <mfwitten@gmail.com>
-
-subst.c
- - new param flags value, PF_ASSIGNRHS, mirrors W_ASSIGNRHS, noting that
- parameter expansion is on rhs of assignment statement. That inhibits
- word splitting
- - change param_expand to call string_list_dollar_at with quoted == 1
- if PF_ASSIGNRHS is set, so it will quote IFS characters in the
- positional parameter before separating them with the first char of
- $IFS. This keeps the rhs from being split inappropriately. Fixes
- bug reported by Andres Perera <andres.p@zoho.com>
-
- 3/4
- ---
-lib/readline/bind.c
- - add a missing free of `names' in rl_function_dumper. Bug report
- and fix from Michael Snyder <msnyder@vmware.com>
-
- 3/5
- ---
-lib/readline/rltty.c
- - change rl_deprep_terminal so it uses fileno (stdin) for the tty fd
- if rl_instream is not set, like rl_prep_terminal
-
- 3/6
- ---
-lib/readline/display.c
- - fix rl_message to use a dynamically-allocated buffer instead of a
- fixed-size buffer of 128 chars for the `local message prompt'. Bug
- report and fix from Micah Cowan <micah@cowan.name>
-
- 3/7
- ---
-jobs.c
- - add sentinel to wait_sigint_handler so it only sets wait_sigint_received
- if waiting_for_child is non-zero; otherwise, it restores the old
- SIGINT handler and sends itself the SIGINT
- - set waiting_for_child around the calls to waitchld that use it to
- synchronously wait for a process
- - change logic that decides whether or not the child process blocked
- or handled SIGINT based on whether or not waitpid returns -1/EINTR
- and the shell receives a SIGINT and the child does not exit. If
- the child later exits due to SIGINT, cancel the assumoption that it
- was handled
- - instead of testing whether or not the child exited due to SIGINT
- when deciding whether the shell should act on a SIGINT it received
- while waiting, test whether or not we think the child caught
- SIGINT. If it did, we let it go (unless the shell has it trapped);
- if it did not catch it, the shell acts on the SIGINT. Fix from
- Linus Torvalds <torvalds@linux-foundation.org>, bug report originally
- from Oleg Nesterov <oleg@redhat.com>
-
- 3/8
- ---
-shell.c
- - initialize no_line_editing to 1 if READLINE is not defined -- we
- can't have line editing without readline
-
- 3/12
- ----
-lib/readline/signals.c
- - add SIGHUP to the set of signals readline handles
-
-lib/readline/doc/rltech.texi
- - document that SIGHUP is now part of the set of signals readline
- handles
-
-lib/readline/input.c
- - if _rl_caught_signal indicates that read() was interrupted by a
- SIGHUP or SIGTERM, return READERR or EOF as appropriate
- - call rl_event_hook, if it's set, if call to read in rl_getc
- returns -1/EINTR. If rl_event_hook doesn't do anything, this
- continues the loop as before. This handles the other fatal
- signals
-
-execute_cmd.c
- - add a couple of QUIT; calls to execute_disk_command and
- execute_simple_command to improve responsiveness to interrupts
- and fatal signals
-
-input.c
- - rearrange getc_with_restart so that the return values from read()
- are handled right
-
-parse.y
- - don't need to set terminate_immediately in yy_stream_get, since
- getc_with_restart checks for terminating signals itself
- - since readline returns READERR on SIGHUP or SIGTERM, don't need
- to set terminate_immediately. Still doesn't handle other
- signals well -- will have to check that some more
-
-bashline.c
- - new function, bash_event_hook, for rl_event_hook. Just checks for
- terminating signals and acts on them using CHECK_TERMSIG.
- - set rl_event_hook to bash_event_hook
-
-builtins/read.def
- - take out setting terminate_immediately; add calls to CHECK_TERMSIG
- after read calls
-
-doc/{bash.1,bashref.texi}
- - move the text describing the effect of negative subscripts used to
- reference indexed array elements to the paragraphs describing
- ${parameter[subscript]}, since that's where they are implemented.
- Pointed out by Christopher F. A. Johnson <cfajohnson@gmail.com>
-
-arrayfunc.[ch],subst.c
- - array_expand_index now takes a new first argument: a SHELL_VAR *
- of the array variable being subscripted. Can be used later to fully
- implement negative subscripts
-
- 3/14
- ----
-lib/glob/glob.c
- - fix mbskipname to not turn the directory entry name into a wide char
- string if the conversion of the pattern to a wide char string fails
- - fix mbskipname to call skipname if either the pattern or the filename
- can't be converted into a wide-char string
-
-lib/glob/xmbsrtowcs.c
- - fix xdupmbstowcs2 to handle return value of 0 from mbsnrtowcs and
- short-circuit with failure in that case. Fixes bug reported by
- Roman Rakus <rrakus@redhat.com>
-
- 3/15
- ----
-bashline.c
- - new variable, bash_filename_quote_characters to store the value
- assigned to rl_filename_quote_characters so it can be restored
- if changed.
- - change bashline_reset and attempt_shell_completion to restore
- rl_filename_quote_characters if not set to default
-
- 3/22
- ----
-lib/glob/glob.c
- - wdequote_pathname falls back to udequote_pathname if xdupmbstowcs
- fails to convert the pathname to a wide-character string
-
-lib/glob/xmbsrtowcs.c
- - xdupmbstowcs2: change to fix problem with leading '\\' (results in
- nms == 0, which causes it to short-circuit with failure right
- away). Fixes bug pointed out by Werner Fink <werner@suse.de>
- - xdupmbstowcs2: compensate for mbsnrtowcs returning 0 by taking the
- next single-byte character and going on
- - xdupmbstowcs2: change memory allocation to increase by WSBUF_INC
- bytes; try to avoid calls to realloc (even if they don't actually
- result in more memory being allocated)
-
- 3/24
- ----
-doc/{bash.1,bashref.texi}
- - slightly modify BASH_SUBSHELL description based on complaint from
- Sam Liddicott <sam@liddicott.com>
-
- 3/25
- ----
-trap.c
- - change free_trap_strings to not call free_trap_string for signals
- that are being ignored, like reset_or_restore_signal_handlers.
- Fixes bug reported by Satoshi Takahashi <blue3waters@gmail.com>
-
- 3/26
- ----
-lib/readline/rltypedefs.h
- - remove old Function/VFunction/CPFunction/CPPFunction typedefs as
- suggested by Tom Tromey <tromey@redhat.com>
-
-lib/readline/rlstdc.h
- - move defines for USE_VARARGS/PREFER_STDARG/PREFER_VARARGS from
- config.h.in to here because declaration of rl_message in
- readline.h uses the defines. This makes it hard for another packages
- to use after the header files are installed, since config.h is not
- one of the installed files. Suggested by Tom Tromey
- <tromey@redhat.com>
-
- 3/27
- ----
-print_cmd.c
- - change indirection_string from a static buffer to a dynamic one
- managed by indirection_level_string(), so we don't end up truncating
- PS4. Suggested by Dennis Williamson <dennistwilliamson@gmail.com>
-
-lib/readline/shell.c
- - change sh_set_lines_and_columns to use static buffers instead of
- allocating the buffers to pass to setenv/putenv
-
-lib/readline/terminal.c
- - change _rl_get_screen_size to not call sh_set_lines_and_columns if
- ignore_env == 0
- - _rl_sigwinch_resize_terminal: new function to just retrieve terminal
- size, ignoring environment
-
-lib/readline/rlprivate.h
- - new external declaration for _rl_sigwinch_resize_terminal() (currently
- unused)
-
-lib/readline/signals.c
- - rl_sigwinch_handler: set _rl_caught_signal to SIGWINCH
- - rl_sigwinch_handler: don't immediately call rl_resize_terminal; just
- leave _rl_caught_signal set for RL_CHECK_SIGNALS to handle
- - _rl_signal_handler: call rl_resize_terminal if sig == SIGWINCH.
- Should fix hang when sending multiple repeated SIGWINCH reported by
- Henning Bekel <h.bekel@googlemail.com>
-
- 3/29
- ----
-lib/sh/snprintf.c
- - include math.h for any defines for isinf/isnan
- - use code from gnulib documentation to implement isinf/isnan if they
- are not defined
-
-configure.in
- - don't check for isinf or isnan; c99 says they're macros anyway
-
-config.h.in
- - remove defines for ISINF_IN_LIBC and ISNAN_IN_LIBC, no longer used
- by snprintf.c
-
- 4/2
- ---
-braces.c
- - brace_gobbler: fix to understand double-quoted command subtitution,
- since the shell understands unquoted comsubs. Fixes bug reported
- by Michael Whitten <mfwitten@gmail.com>
-
-lib/readline/display.c
- - include <pc.h> on MDOS
- - get and set screen size using DJGPP-specific calls on MSDOS
- - move cursor up clear screen using DJGPP-specific calls
- - don't call tputs on DJGPP; there is no good terminfo support
-
-lib/readline/terminal.c
- - include <pc.h> on MDOS
- - get and set screen size using DJGPP-specific calls on MSDOS
- - use DJGPP-specific initialization on MSDOS, zeroing all the
- _rl_term_* variables
- - don't call tputs on DJGPP; there is no good terminfo support
- DJGPP support from Eli Zaretskii <eliz@gnu.org>
-
- 4/6
- ---
-
-config-top.h
- - change DEFAULT_PATH_VALUE to something more useful and modern
-
- 4/8
- ---
-tests/printf2.sub
- - make sure LC_ALL and LC_CTYPE are set so LANG assignment takes effect.
- Reported by Cedric Arbogast <arbogast.cedric@gmail.com>
-
- 4/11
- ----
-include/chartypes.h
- - fix a couple of dicey defines (though ones that don't cause any
- compiler warnings) in IN_CTYPE_DOMAIN
-
-doc/{bashref.texi,bash.1}
- - add note referring to duplicating file descriptors in sections
- describing redirecting stdout and stderr and appending to stdout
- and stderr. Suggested by Matthew Dinger <mdinger.bugzilla@gmail.com>
-
-pcomplete.c
- - it_init_helptopics: new function to support completing on help topics,
- not just builtins
- - it_helptopics: new programmable completion list of help topics
- - build list of helptopic completions in gen_action_completions on
- demand
-
-pcomplete.h
- - new extern declaration for it_helptopics
-
-builtins/complete.def
- - the `helptopic' action now maps to CA_HELPTOPIC intead of CA_BUILTIN,
- since there are more help topics than just builtins. Suggested by
- Clark Wang <dearvoid@gmail.com>
-
- 4/12
- ----
-print_cmd.c
- - fix print_arith_for_command to add a call to PRINT_DEFERRED_HEREDOCS
- before ending the body of the command, so heredocs get attached to
- the right command instead of to the loop. From gentoo bug 363371
- http://bugs.gentoo.org/show_bug.cgi?id=363371
-
-execute_cmd.c
- - change coproc_pidchk to unset the appropriate shell variables when
- the (currently single) known coproc pid terminates
- - cleanup and new functions to fully support multiple coprocesses when
- and if I decide to go there
-
- 4/13
- ----
-print_cmd.c
- - fix print_group_command to add a call to PRINT_DEFERRED_HEREDOCS
- after call to make_command_string_internal before printing closing
- `}'
- - fix make_command_string_internal to add a call to
- PRINT_DEFERRED_HEREDOCS after recursive call to
- make_command_string_internal in case cm_subshell before printing
- closing `)'
-
- 4/14
- ----
-print_cmd.c
- - change overlapping strcpy in named_function_string to memmove
-
-sig.h
- - UNBLOCK_SIGNAL: convenience define, same as UNBLOCK_CHILD, just
- restores an old signal mask
-
-trap.c
- - set_signal: instead of setting the signal handler to SIG_IGN while
- installing the new trap handler, block the signal and unblock it
- after the new handler is installed. Fixes bug reported by Roman
- Rakus <rrakus@redhat.com>
-
- 4/15
- ----
-doc/{bash.1,bashref.texi}
- - make it clear that enabling monitor mode means that all jobs run in
- separate process groups
-
- 4/18
- ----
-builtins/fc.def
- - update fix of 4/15/2010 to not take saved_command_line_count into
- account when stepping down the history list to make sure that
- last_hist indexes something that is valid. Fixes bug reported by
- <piuma@piumalab.org>
-
- 4/19
- ----
-builtins/fc.def
- - fc_gethnum: make sure the calculation to decide the last history
- entry is exactly the same as fc_builtin. Fixes bug uncovered by
- fix of 4/18 to stop seg fault
-
- 4/22
- ----
-lib/readline/terminal.c
- - change _rl_enable_meta_key to set a flag indicating that it sent the
- enable-meta sequence
- - _rl_disable_meta_key: new function to turn off meta mode after we
- turned it on with _rl_enable_meta_key
-
-lib/readline/rlprivate.h
- - extern declaration for _rl_disable_meta_key
-
-configure.in
- - if not cross-compiling, set CFLAGS_FOR_BUILD from any CFLAGS inherited
- from the environment. Fixes HP/UX build problem reported by
- "Daniel Richard G." <skunk@iSKUNK.ORG>
-
- 4/26
- ----
-config-top.h
- - define MULTIPLE_COPROCS to 0 so the code is still disabled but easy
- to enable via configure option or editing this file
-
- 4/29
- ----
-lib/sh/eaccess.c
- - freebsd provides faccessat, with the same misfeature as their eaccess
- and access implementations (X_OK returns true for uid==0 regardless
- of the actual file permissions), so reorganize code to check the
- file permissions as with eaccess. Report and fix from Johan Hattne
- <johan.hattne@utsouthwestern.edu>
-
- 5/2
- ---
-doc/{bash.1,bashref.texi}
- - add forward reference to `Pattern Matching' from `Pathname
- Expansion', suggested by Greg Wooledge <wooledg@eeg.ccf.org>
-
- 5/5
- ---
-pcomplib.c
- - the bash_completion project now distributes over 200 completions
- for various programs, with no end in sight, so increase the value
- of COMPLETE_HASH_BUCKETS from 32 to 128
-
-pathexp.c
- - quote_string_for_globbing: make sure CTLESC quoting CTLESC is
- translated into \<CTLESC> even if the flags include QGLOB_REGEXP.
- We don't want to process the second CTLESC as a quote character.
- Fixes bug reported by Shawn Bohrer <sbohrer@rgmadvisors.com>
-
- 5/6
- ---
-builtins/printf.def
- - change PRETURN to not call fflush if ferror(stdout) is true
- - if a call to one of the stdio functions or printstr leaves
- ferror(stdout) true, and PRETURN is going to be called, let PRETURN
- print the error message rather than doubling up the messages. Fixes
- problem reported by Roman Rakus <rrakus@redhat.com>
-
- 5/9
- ---
-doc/{bash.1,bashref.texi}
- - add note to the effect that lists inside compound command can be
- terminated by newlines as well as semicolons. Suggested by
- Roman Byshko <rbyshko@gmail.com>
-
- 5/10
- ----
-subst.c
- - remove_quoted_nulls: fix problem that caused it to skip over the
- character after a CTLNUL, which had the effect of skipping every
- other of a series of CTLNULs. Fixes bug reported by
- Marten Wikstrom <marten.wikstrom@keystream.se>
-
- 5/11
- ----
-subst.c
- - extract_process_subst: add SX_COMMAND flag to call to
- extract_delimited_string, since we're expanding the same sort of
- command as command substitution. Fixes bug reported in Ubuntu
- bug 779848
-
- 5/12
- ----
-configure.in
- - set the prefer_shared and prefer_static variables appropriately
- depending on the value of $opt_static_link
-
-aclocal.m4
- - AC_LIB_LINKFLAGS_BODY: change to not prefer shared versions of the
- libraries it's searching for if the prefer_shared variable is "no".
- Fixes problem reported by Cedric Arbogast <arbogast.cedric@gmail.com>
-
- 5/13
- ----
-lib/readline/readline.c
- - _rl_internal_teardown: add call to _rl_disable_meta_key to make the
- meta key active only for the duration of the call to readline()
- - _rl_internal_setup: move call to _rl_enable_meta_key here from
- readline_initialize_everything so the meta key is active only for
- the duration of the call to readline(). Suggestion from Miroslav
- Lichvar <mlichvar@redhat.com>
-
-builtins/help.def
- - help_builtin: change strncmp to strcmp so that `help read' no longer
- matches `readonly'. Suggested by Clark Wang <dearvoid@gmail.com>
-
-config.h.in
- - add define for GLIBC21, checked using jm_GLIBC21 as part of the tests
- for libintl
-
-lib/malloc/malloc.c
- - internal_free: don't use the cached value of memtop when deciding
- whether or not to adjust the break and give memory back to the kernel
- when using the GNU C library, since glibc uses sbrk for its own
- internal purposes. From Debian bug 614815, reported by Samuel
- Thibault <samuel.thibault@gnu.org>
-
-aclocal.m4
- - BASH_STRUCT_WEXITSTATUS_OFFSET: change AC_RUN_IFELSE to AC_TRY_RUN
- to avoid warning about not using AC_LANG_SOURCE
-
- 5/14
- ----
-bashline.[ch]
- - two new functions, bashline_set_event_hook and bashline_reset_event_hook,
- to set rl_event_hook to bash_event_hook and back to NULL, respectively
- - don't set rl_event_hook unconditionally
-
-sig.c
- - termsig_sighandler: if the shell is currently interactive and
- readline is active, call bashline_set_event_hook to cause
- termsig_handler to be called via bash_event_hook when the shell
- returns from the signal handler
-
- 5/15
- ----
-lib/readline/display.c
- - _rl_col_width: Mac OS X has a bug in wcwitdh: it does not return 0
- for UTF-8 combining characters. Added workaround dependent on
- MACOSX. Fixes problem pointed out by Thomas De Contes
- <d.l.tDecontes@free.fr>
-
- 5/16
- ----
-lib/readline/rlmbutil.h
- - WCWIDTH: wrapper for wcwidth that returns 0 for Unicode combining
- characters on systems where wcwidth is broken (e.g., Mac OS X).
-
-lib/readline/{complete,display,mbutil}.c
- - use WCWIDTH instead of wcwidth
-
- 5/17
- ----
-lib/readline/display.c
- - update_line: after computing ofd and nfd, see whether the next
- character in ofd is a zero-width combining character. If it is,
- back ofd and nfd up one, so the base characters no longer compare
- as equivalent. Fixes problem reported by Keith Winstein
- <keithw@mit.edu>
-
-lib/readline/nls.c
- - _rl_utf8locale: new flag variable, set to non-zero if the current
- locale is UTF-8
- - utf8locale(): new function, returns 1 if the passed lspec (or the
- current locale) indicates that the locale is UTF-8. Called from
- _rl_init_eightbit
-
-lib/readline/rlprivate.h
- - extern declaration for _rl_utf8locale
-
-locale.c
- - locale_utf8locale: new flag variable, set to non-zero if the current
- locale is UTF-8 (currently unused)
- - locale_isutf8(): new function, returns 1 if the passed lspec (or the
- current locale) indicates that the locale is UTF-8. Should be called
- whenever the locale or LC_CTYPE value is modified
-
-aclocal.m4
- - BASH_WCWIDTH_BROKEN: new test for whether or not wcwidth returns
- zero-width characters like unicode combining characters as having
- display length 1; define WCWIDTH_BROKEN in this case
-
-config.h.in
- - WCWIDTH_BROKEN: new define
-
-lib/readline/rlmbutil.h
- - change WCWIDTH macro to use _rl_utf8locale and the full range of
- Unicode combining characters (U+0300-U+036F)
-
- 5/19
- ----
-lib/readline/rlprivate.h
- - _rl_search_context: new member, prevc, will hold character read
- prior to lastc
-
-lib/readline/isearch.c
- - _rl_isearch_dispatch: if the character causes us to index into
- another keymap, save that character in cxt->prevc
- - _rl_isearch_dispatch: if we index into another keymap, but don't
- find a function that's special to i-search, and the character that
- caused us to index into that keymap would have terminated the
- search, push back cxt->prevc and cxt->lastc to make it appear as
- if `prevc' terminated the search, and execute lastc as a command.
- We have to push prevc back so we index into the same keymap before
- we read lastc. Fixes bug report from Davor Cubranic
- <cubranic@stat.ubc.ca>
-
- 5/20
- ----
-expr.c
- - expr_bind_variable: pay attention to the return value from
- bind_variable and check whether or not we should error out due to
- a readonly or noassign variable. Fixes bug reported by Eric
- Blake <eblake@redhat.com>
-
- 5/26
- ----
-
-lib/readline/search.c
- - include histlib.h for ANCHORED_SEARCH defines
- - rl_history_search_flags: new variable, holds ANCHORED_SEARCH flag for
- the duration of a history search
- - rl_history_search_reinit: takes a new flags variable, defines whether
- or not the search is anchored; assigned to rl_history_search_flags
- - rl_history_serarch_reinit: if ANCHORED_SEARCH flag passed, add ^ to
- beginning of search string; otherwise search string is unmodified
- - rl_history_search_internal: set rl_point appropriately based on
- whether or not rl_history_search_flags includes ANCHORED_SEARCH
- - rl_history_substr_search_forward: new function, for non-anchored
- substring search forward through history for string of characters
- preceding rl_point
- - rl_history_substr_search_backward: new function, for non-anchored
- substring search backward through history for string of characters
- preceding rl_point. Original code from Niraj Kulkarni
- <kulkarniniraj14@gmail.com>
-
-lib/readline/readline.h
- - extern declarations for rl_history_substr_search_{for,back}ward
-
-lib/readline/funmap.c
- - history-substring-search-forward: new bindable command, invokes
- rl_history_substr_search_forward
- - history-substring-search-backward: new bindable command, invokes
- rl_history_substr_search_backward
-
-lib/readline/doc/{rluser.texi,readline.3}
- - document history-substring-search-forward and
- history-substring-search-backward
-
- 5/27
- ----
-{nojobs,jobs}.c
- - add support for DONT_REPORT_SIGTERM so that the shell doesn't print
- a message when a job exits due to SIGTERM since that's the default
- signal sent by the kill builtin. Suggested by Marc Herbert
- <mark.herbert@gmail.com>
-
-config-top.h
- - DONT_REPORT_SIGTERM: new user-modifiable setting. Commented out
- by default
-
- 5/28
- ----
-lib/readline/bind.c
- - _rl_skip_to_delim: skip to a closing double quote or other delimiter,
- allowing backslash to quote any character, including the delimiter
- - rl_parse_and_bind: call _rl_skip_to_delim instead of using inline
- code
- - rl_parse_and_bind: allow quoted strings as the values of string
- variables. Variable values without double quotes have trailing
- whitespace removed (which still allows embedded whitespace, for
- better or worse). Fixes problem with string variables not matching
- in `set' command if values happen to have trailing spaces or tabs
- (debian bash bug #602762), but introduces slight incompatibility.
-
- 5/29
- ----
-doc/{bash.1,bashref.texi}
- - clarify unset description to specify that without options, a
- variable, then a shell function if there is no variable by that
- name, is unset. Fixes discrepancy reported by Mu Qiao
- <qiaomuf@gentoo.org>
-
- 6/4
- ----
-doc/{bash.1,bashref.texi}
- - clarify description of LINES and COLUMNS (and checkwinsize shopt
- option) to make it clear that only interactive shells set a
- handler for SIGWINCH and update LINES and COLUMNS. Original
- report submitted by Jonathan Nieder <jrnieder@gmail.com>
-
-arrayfunc.c
- - expand_compound_array_assignment: defer expansion of words between
- parens when performing compound assignmnt to an associative array
- variable
- - assign_compound_array_list: perform the same expansions when doing
- a compound array assignment to an associative array variable as
- when doing a straight array index assignment. The idea is that
- foo=( [ind1]=bar [ind2]=quux)
- is the same as
- foo[ind1]=bar ; foo[ind2]=quux
-
- This fixes problems with double-expansion and quote removal being
- performed on the array indices
-
- 6/13
- ----
-doc/{bash.1,bashref.texi}
- - Add a little text to make it clear that the locale determines how
- range expressions in glob patterns are handled.
-
-
- 6/21
- ----
-builtins/read.def
- - display a message and return error status if -a is used with an
- existing associative array. Fixes bug reported by Curtis Doty
- <curtis@greenkey.net>
-
- 6/24
- ----
-{jobs,nojobs}.c
- - non-interactive shells now react to the setting of checkwinsize
- and set LINES and COLUMNS after a foreground job exits. From a
- suggestion by Leslie Rhorer <lrhorer@satx.rr.com>
-
-lib/readline/histfile.c
- - history_backupfile: new file, creates a backup history file name
- given a filename (appending `-')
- - history_do_write: when overwriting the history file, back it up
- before writing. Restore backup file on a write error. Suggested
- by chkno@chkno.net
-
-bashline.c
- - find_cmd_name: two new arguments, return the start and end of the
- actual text string used to find the command name, without taking
- whitespace into account
- - attempt_shell_completion: small changes to make sure that completion
- attempted at the beginning of a non-empty line does not find a
- programmable completion, even if the command name starts at point
- - attempt_shell_completion: small change to make sure that completion
- does not find a progcomp when in whitespace before the command
- name
- - attempt_shell_completion: small change to make sure that completion
- does not find a progcomp when point is at the first character of a
- command name, even when there is leading whitespace (similar to
- above). Fixes problems noted by Ville Skytta <ville.skytta@iki.fi>
-
-subst.c
- - brace_expand_word_list: since the individual strings in the strvec
- returned by brace_expand are already allocated, don't copy them to
- newly-allocated memory when building the WORD_LIST, just use them
- intact
-
-locale.c
- - locale_mb_cur_max: cache value of MB_CUR_MAX when we set or change
- the locale to avoid a function call every time we need to read it
-
-shell.h
- - new struct to save shell_input_line and associated variables:
- shell_input_line_state_t
- - add members of sh_parser_state_t to save and restore token and the
- size of the token buffer
-
-parse.y
- - {save,restore}_input_line_state: new functions to save and restore
- shell_input_line and associated variables
- - {save,restore}_parser_state: add code to save and restore the token
- and token buffer size
- - xparse_dolparen: call save_ and restore_input_line_state to avoid
- problems with overwriting shell_input_line when we recursively
- call the parser to parse a command substitution. Fixes bug
- reported by Rui Santos <rsantos@grupopie.com>
-
-include/shmbutil.h
- - use locale_mb_cur_max instead of MB_CUR_MAX in ADVANCE_CHAR and
- similar macros
+++ /dev/null
-Starting bash with the `--posix' command-line option or executing
-`set -o posix' while bash is running will cause bash to conform more
-closely to the Posix.2 standard by changing the behavior to match that
-specified by Posix.2 in areas where the bash default differs.
-
-The following list is what's changed when `posix mode' is in effect:
-
-1. When a command in the hash table no longer exists, bash will re-search
- $PATH to find the new location. This is also available with
- `shopt -s checkhash'.
-
-2. The >& redirection does not redirect stdout and stderr.
-
-3. The message printed by the job control code and builtins when a job
- exits with a non-zero status is `Done(status)'.
-
-4. Reserved words may not be aliased.
-
-5. The Posix.2 PS1 and PS2 expansions of `!' -> history number and
- `!!' -> `!' are enabled, and parameter expansion is performed on
- the value regardless of the setting of the `promptvars' option.
-
-6. Interactive comments are enabled by default. (Note that bash has
- them on by default anyway.)
-
-7. The Posix.2 startup files are executed ($ENV) rather than the normal
- bash files.
-
-8. Tilde expansion is only performed on assignments preceding a command
- name, rather than on all assignment statements on the line.
-
-9. The default history file is ~/.sh_history (default value of $HISTFILE).
-
-10. The output of `kill -l' prints all the signal names on a single line,
- separated by spaces.
-
-11. Non-interactive shells exit if `file' in `. file' is not found.
-
-12. Redirection operators do not perform pathname expansion on the word
- in the redirection unless the shell is interactive
-
-13. Function names must be valid shell identifiers. That is, they may not
- contain characters other than letters, digits, and underscores, and
- may not start with a digit. Declaring a function with an illegal name
- causes a fatal syntax error in non-interactive shells.
-
-14. Posix.2 `special' builtins are found before shell functions during command
- lookup.
-
-15. If a Posix.2 special builtin returns an error status, a non-interactive
- shell exits. The fatal errors are those listed in the POSIX.2 standard,
- and include things like passing incorrect options, redirection errors,
- variable assignment errors for assignments preceding the command name,
- and so on.
-
-16. The environment passed to executed commands is not sorted. Neither is
- the output of `set'. This is not strictly Posix.2 behavior, but sh
- does it this way. Ksh does not. It's not necessary to sort the
- environment; no program should rely on it being sorted.
-
-17. If the `cd' builtin finds a directory to change to using $CDPATH, the
- value it assigns to $PWD does not contain any symbolic links, as if
- `cd -P' had been executed.
-
-18. A non-interactive shell exits with an error status if a variable
- assignment error occurs when no command name follows the assignment
- statements. A variable assignment error occurs, for example, when
- trying to assign a value to a read-only variable.
-
-19. A non-interactive shell exits with an error status if the iteration
- variable in a for statement or the selection variable in a select
- statement is a read-only variable.
-
-20. Process substitution is not available.
-
-21. Assignment statements preceding POSIX.2 `special' builtins persist in
- the shell environment after the builtin completes.
-
-There is other Posix.2 behavior that bash does not implement. Specifically:
-
-1. Assignment statements affect the execution environment of all builtins,
- not just special ones.
+++ /dev/null
-This file is set.def, from which is created set.c.
-It implements the "set" and "unset" builtins in Bash.
-
-Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
-
-This file is part of GNU Bash, the Bourne Again SHell.
-
-Bash is free software; you can redistribute it and/or modify it under
-the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 1, or (at your option) any later
-version.
-
-Bash is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-for more details.
-
-You should have received a copy of the GNU General Public License along
-with Bash; see the file COPYING. If not, write to the Free Software
-Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
-$PRODUCES set.c
-
-#include <stdio.h>
-#include "../shell.h"
-#include "../flags.h"
-
-#include "bashgetopt.h"
-
-extern int interactive;
-extern int noclobber, posixly_correct;
-#if defined (READLINE)
-extern int rl_editing_mode, no_line_editing;
-#endif /* READLINE */
-
-$BUILTIN set
-$FUNCTION set_builtin
-$SHORT_DOC set [--abefhkmnptuvxldBCHP] [-o option] [arg ...]
- -a Mark variables which are modified or created for export.
- -b Notify of job termination immediately.
- -e Exit immediately if a command exits with a non-zero status.
- -f Disable file name generation (globbing).
- -h Locate and remember function commands as functions are
- defined. Function commands are normally looked up when
- the function is executed.
- -i Force the shell to be an "interactive" one. Interactive shells
- always read `~/.bashrc' on startup.
- -k All keyword arguments are placed in the environment for a
- command, not just those that precede the command name.
- -m Job control is enabled.
- -n Read commands but do not execute them.
- -o option-name
- Set the variable corresponding to option-name:
- allexport same as -a
- braceexpand same as -B
-#if defined (READLINE)
- emacs use an emacs-style line editing interface
-#endif /* READLINE */
- errexit same as -e
- histexpand same as -H
- ignoreeof the shell will not exit upon reading EOF
- interactive-comments
- allow comments to appear in interactive commands
- monitor same as -m
- noclobber disallow redirection to existing files
- noexec same as -n
- noglob same as -f
- nohash same as -d
- notify save as -b
- nounset same as -u
- physical same as -P
- posix change the behavior of bash where the default
- operation differs from the 1003.2 standard to
- match the standard
- privileged same as -p
- verbose same as -v
-#if defined (READLINE)
- vi use a vi-style line editing interface
-#endif /* READLINE */
- xtrace same as -x
- -p Turned on whenever the real and effective user ids do not match.
- Disables processing of the $ENV file and importing of shell
- functions. Turning this option off causes the effective uid and
- gid to be set to the real uid and gid.
- -t Exit after reading and executing one command.
- -u Treat unset variables as an error when substituting.
- -v Print shell input lines as they are read.
- -x Print commands and their arguments as they are executed.
- -l Save and restore the binding of the NAME in a FOR command.
- -d Disable the hashing of commands that are looked up for execution.
- Normally, commands are remembered in a hash table, and once
- found, do not have to be looked up again.
-#if defined (BRACE_EXPANSION)
- -B the shell will perform brace expansion
-#endif /* BRACE_EXPANSION */
-#if defined (BANG_HISTORY)
- -H Enable ! style history substitution. This flag is on
- by default.
-#endif /* BANG_HISTORY */
- -C If set, disallow existing regular files to be overwritten
- by redirection of output.
- -P If set, do not follow symbolic links when executing commands
- such as cd which change the current directory.
-
-Using + rather than - causes these flags to be turned off. The
-flags can also be used upon invocation of the shell. The current
-set of flags may be found in $-. The remaining n ARGs are positional
-parameters and are assigned, in order, to $1, $2, .. $n. If no
-ARGs are given, all shell variables are printed.
-$END
-
-/* An a-list used to match long options for set -o to the corresponding
- option letter. */
-struct {
- char *name;
- int letter;
-} o_options[] = {
- { "allexport", 'a' },
-#if defined (BRACE_EXPANSION)
- { "braceexpand",'B' },
-#endif
- { "errexit", 'e' },
- { "histexpand", 'H' },
- { "monitor", 'm' },
- { "noexec", 'n' },
- { "noglob", 'f' },
- { "nohash", 'd' },
-#if defined (JOB_CONTROL)
- { "notify", 'b' },
-#endif /* JOB_CONTROL */
- {"nounset", 'u' },
- {"physical", 'P' },
- {"privileged", 'p' },
- {"verbose", 'v' },
- {"xtrace", 'x' },
- {(char *)NULL, 0},
-};
-
-#define MINUS_O_FORMAT "%-15s\t%s\n"
-
-void
-list_minus_o_opts ()
-{
- register int i;
- char *on = "on", *off = "off";
-
- printf (MINUS_O_FORMAT, "noclobber", (noclobber == 1) ? on : off);
-
- if (find_variable ("ignoreeof") || find_variable ("IGNOREEOF"))
- printf (MINUS_O_FORMAT, "ignoreeof", on);
- else
- printf (MINUS_O_FORMAT, "ignoreeof", off);
-
- printf (MINUS_O_FORMAT, "interactive-comments",
- interactive_comments ? on : off);
-
- printf (MINUS_O_FORMAT, "posix", posixly_correct ? on : off);
-
-#if defined (READLINE)
- if (no_line_editing)
- {
- printf (MINUS_O_FORMAT, "emacs", off);
- printf (MINUS_O_FORMAT, "vi", off);
- }
- else
- {
- /* Magic. This code `knows' how readline handles rl_editing_mode. */
- printf (MINUS_O_FORMAT, "emacs", (rl_editing_mode == 1) ? on : off);
- printf (MINUS_O_FORMAT, "vi", (rl_editing_mode == 0) ? on : off);
- }
-#endif /* READLINE */
-
- for (i = 0; o_options[i].name; i++)
- {
- int *on_or_off, zero = 0;
-
- on_or_off = find_flag (o_options[i].letter);
- if (on_or_off == FLAG_UNKNOWN)
- on_or_off = &zero;
- printf (MINUS_O_FORMAT, o_options[i].name, (*on_or_off == 1) ? on : off);
- }
-}
-
-set_minus_o_option (on_or_off, option_name)
- int on_or_off;
- char *option_name;
-{
- int option_char = -1;
-
- if (STREQ (option_name, "noclobber"))
- {
- if (on_or_off == FLAG_ON)
- bind_variable ("noclobber", "");
- else
- unbind_variable ("noclobber");
- stupidly_hack_special_variables ("noclobber");
- }
- else if (STREQ (option_name, "ignoreeof"))
- {
- unbind_variable ("ignoreeof");
- unbind_variable ("IGNOREEOF");
- if (on_or_off == FLAG_ON)
- bind_variable ("IGNOREEOF", "10");
- stupidly_hack_special_variables ("IGNOREEOF");
- }
-
-#if defined (READLINE)
- else if ((STREQ (option_name, "emacs")) || (STREQ (option_name, "vi")))
- {
- if (on_or_off == FLAG_ON)
- {
- rl_variable_bind ("editing-mode", option_name);
-
- if (interactive)
- with_input_from_stdin ();
- no_line_editing = 0;
- }
- else
- {
- int isemacs = (rl_editing_mode == 1);
- if ((isemacs && STREQ (option_name, "emacs")) ||
- (!isemacs && STREQ (option_name, "vi")))
- {
- if (interactive)
- with_input_from_stream (stdin, "stdin");
- no_line_editing = 1;
- }
- else
- builtin_error ("not in %s editing mode", option_name);
- }
- }
-#endif /* READLINE */
- else if (STREQ (option_name, "interactive-comments"))
- interactive_comments = (on_or_off == FLAG_ON);
- else if (STREQ (option_name, "posix"))
- {
- posixly_correct = (on_or_off == FLAG_ON);
- unbind_variable ("POSIXLY_CORRECT");
- unbind_variable ("POSIX_PEDANTIC");
- if (on_or_off == FLAG_ON)
- {
- bind_variable ("POSIXLY_CORRECT", "");
- stupidly_hack_special_variables ("POSIXLY_CORRECT");
- }
- }
- else
- {
- register int i;
- for (i = 0; o_options[i].name; i++)
- {
- if (STREQ (option_name, o_options[i].name))
- {
- option_char = o_options[i].letter;
- break;
- }
- }
- if (option_char == -1)
- {
- builtin_error ("%s: unknown option name", option_name);
- return (EXECUTION_FAILURE);
- }
- if (change_flag (option_char, on_or_off) == FLAG_ERROR)
- {
- bad_option (option_name);
- return (EXECUTION_FAILURE);
- }
- }
- return (EXECUTION_SUCCESS);
-}
-
-/* Set some flags from the word values in the input list. If LIST is empty,
- then print out the values of the variables instead. If LIST contains
- non-flags, then set $1 - $9 to the successive words of LIST. */
-set_builtin (list)
- WORD_LIST *list;
-{
- int on_or_off, flag_name, force_assignment = 0;
-
- if (!list)
- {
- SHELL_VAR **vars;
-
- vars = all_shell_variables ();
- if (vars)
- {
- print_var_list (vars);
- free (vars);
- }
-
- vars = all_shell_functions ();
- if (vars)
- {
- print_var_list (vars);
- free (vars);
- }
-
- return (EXECUTION_SUCCESS);
- }
-
- /* Check validity of flag arguments. */
- if (*list->word->word == '-' || *list->word->word == '+')
- {
- register char *arg;
- WORD_LIST *save_list = list;
-
- while (list && (arg = list->word->word))
- {
- char c;
-
- if (arg[0] != '-' && arg[0] != '+')
- break;
-
- /* `-' or `--' signifies end of flag arguments. */
- if (arg[0] == '-' &&
- (!arg[1] || (arg[1] == '-' && !arg[2])))
- break;
-
- while (c = *++arg)
- {
- if (find_flag (c) == FLAG_UNKNOWN && c != 'o')
- {
- char s[2];
- s[0] = c; s[1] = '\0';
- bad_option (s);
- if (c == '?')
- builtin_usage ();
- return (c == '?' ? EXECUTION_SUCCESS : EXECUTION_FAILURE);
- }
- }
- list = list->next;
- }
- list = save_list;
- }
-
- /* Do the set command. While the list consists of words starting with
- '-' or '+' treat them as flags, otherwise, start assigning them to
- $1 ... $n. */
- while (list)
- {
- char *string = list->word->word;
-
- /* If the argument is `--' or `-' then signal the end of the list
- and remember the remaining arguments. */
- if (string[0] == '-' && (!string[1] || (string[1] == '-' && !string[2])))
- {
- list = list->next;
-
- /* `set --' unsets the positional parameters. */
- if (string[1] == '-')
- force_assignment = 1;
-
- /* Until told differently, the old shell behaviour of
- `set - [arg ...]' being equivalent to `set +xv [arg ...]'
- stands. Posix.2 says the behaviour is marked as obsolescent. */
- else
- {
- change_flag ('x', '+');
- change_flag ('v', '+');
- }
-
- break;
- }
-
- if ((on_or_off = *string) &&
- (on_or_off == '-' || on_or_off == '+'))
- {
- int i = 1;
- while (flag_name = string[i++])
- {
- if (flag_name == '?')
- {
- builtin_usage ();
- return (EXECUTION_SUCCESS);
- }
- else if (flag_name == 'o') /* -+o option-name */
- {
- char *option_name;
- WORD_LIST *opt;
-
- opt = list->next;
-
- if (!opt)
- {
- list_minus_o_opts ();
- continue;
- }
-
- option_name = opt->word->word;
-
- if (!option_name || !*option_name || (*option_name == '-'))
- {
- list_minus_o_opts ();
- continue;
- }
- list = list->next; /* Skip over option name. */
-
- if (set_minus_o_option (on_or_off, option_name) != EXECUTION_SUCCESS)
- return (EXECUTION_FAILURE);
- }
- else
- {
- if (change_flag (flag_name, on_or_off) == FLAG_ERROR)
- {
- char opt[3];
- opt[0] = on_or_off;
- opt[1] = flag_name;
- opt[2] = '\0';
- bad_option (opt);
- builtin_usage ();
- return (EXECUTION_FAILURE);
- }
- }
- }
- }
- else
- {
- break;
- }
- list = list->next;
- }
-
- /* Assigning $1 ... $n */
- if (list || force_assignment)
- remember_args (list, 1);
- return (EXECUTION_SUCCESS);
-}
-
-$BUILTIN unset
-$FUNCTION unset_builtin
-$SHORT_DOC unset [-f] [-v] [name ...]
-For each NAME, remove the corresponding variable or function. Given
-the `-v', unset will only act on variables. Given the `-f' flag,
-unset will only act on functions. With neither flag, unset first
-tries to unset a variable, and if that fails, then tries to unset a
-function. Some variables (such as PATH and IFS) cannot be unset; also
-see readonly.
-$END
-
-#define NEXT_VARIABLE() any_failed++; list = list->next; continue;
-
-unset_builtin (list)
- WORD_LIST *list;
-{
- int unset_function, unset_variable, unset_array, opt, any_failed;
- char *name;
-
- unset_function = unset_variable = unset_array = any_failed = 0;
-
- reset_internal_getopt ();
- while ((opt = internal_getopt (list, "fv")) != -1)
- {
- switch (opt)
- {
- case 'f':
- unset_function = 1;
- break;
- case 'v':
- unset_variable = 1;
- break;
- default:
- builtin_usage ();
- return (EXECUTION_FAILURE);
- }
- }
-
- list = loptend;
-
- if (unset_function && unset_variable)
- {
- builtin_error ("cannot simultaneously unset a function and a variable");
- return (EXECUTION_FAILURE);
- }
-
- while (list)
- {
- SHELL_VAR *var;
- int tem;
-#if defined (ARRAY_VARS)
- char *t;
-#endif
-
- name = list->word->word;
-
-#if defined (ARRAY_VARS)
- if (!unset_function && valid_array_reference (name))
- {
- t = strchr (name, '[');
- *t++ = '\0';
- unset_array++;
- }
-#endif
-
- var = unset_function ? find_function (name) : find_variable (name);
-
- if (var && !unset_function && non_unsettable_p (var))
- {
- builtin_error ("%s: cannot unset", name);
- NEXT_VARIABLE ();
- }
-
- /* Posix.2 says that unsetting readonly variables is an error. */
- if (var && readonly_p (var))
- {
- builtin_error ("%s: cannot unset: readonly %s",
- name, unset_function ? "function" : "variable");
- NEXT_VARIABLE ();
- }
-
- /* Unless the -f option is supplied, the name refers to a variable. */
-#if defined (ARRAY_VARS)
- if (var && unset_array)
- {
- if (array_p (var) == 0)
- {
- builtin_error ("%s: not an array variable", name);
- NEXT_VARIABLE ();
- }
- else
- tem = unbind_array_element (var, t);
- }
- else
-#endif /* ARRAY_VARS */
- tem = makunbound (name, unset_function ? shell_functions : shell_variables);
-
- /* This is what Posix.2 draft 11+ says. ``If neither -f nor -v
- is specified, the name refers to a variable; if a variable by
- that name does not exist, a function by that name, if any,
- shall be unset.'' */
- if ((tem == -1) && !unset_function && !unset_variable)
- tem = makunbound (name, shell_functions);
-
- if (tem == -1)
- any_failed++;
- else if (!unset_function)
- stupidly_hack_special_variables (name);
-
- list = list->next;
- }
-
- if (any_failed)
- return (EXECUTION_FAILURE);
- else
- return (EXECUTION_SUCCESS);
-}
+++ /dev/null
-/* unwind_prot.h - Macros and functions for hacking unwind protection. */
-
-/* Copyright (C) 1993 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software; you can redistribute it and/or modify it under
- the terms of the GNU General Public License as published by the Free
- Software Foundation; either version 2, or (at your option) any later
- version.
-
- Bash is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- for more details.
-
- You should have received a copy of the GNU General Public License along
- with Bash; see the file COPYING. If not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#if !defined (_UNWIND_PROT_H)
-#define _UNWIND_PROT_H
-
-/* Run a function without interrupts. */
-extern void begin_unwind_frame ();
-extern void discard_unwind_frame ();
-extern void run_unwind_frame ();
-extern void add_unwind_protect ();
-extern void remove_unwind_protect ();
-extern void run_unwind_protects ();
-extern void unwind_protect_var ();
-
-/* Define for people who like their code to look a certain way. */
-#define end_unwind_frame()
-
-/* How to protect an integer. */
-#define unwind_protect_int(X) unwind_protect_var (&(X), (char *)(X), sizeof (int))
-
-/* How to protect a pointer to a string. */
-#define unwind_protect_string(X) \
- unwind_protect_var ((int *)&(X), (X), sizeof (char *))
-
-/* How to protect any old pointer. */
-#define unwind_protect_pointer(X) unwind_protect_string (X)
-
-/* How to protect the contents of a jmp_buf. */
-#define unwind_protect_jmp_buf(X) \
- unwind_protect_var ((int *)(X), (char *)(X), sizeof (procenv_t))
-
-#endif /* _UNWIND_PROT_H */
+++ /dev/null
-#
-# Master distribution manifest for bash
-#
-#
-# Filename type
-#
-CWRU d
-CWRU/misc d
-builtins d
-cross-build d
-doc d
-examples d
-examples/obashdb d
-examples/complete d
-examples/functions d
-examples/scripts d
-examples/scripts.v2 d
-examples/scripts.noah d
-examples/startup-files d
-examples/startup-files/apple d
-examples/misc d
-examples/loadables d
-examples/loadables/perl d
-include d
-lib d
-lib/glob d
-lib/glob/doc d
-lib/intl d
-lib/malloc d
-lib/readline d
-lib/readline/doc d
-lib/readline/examples d
-lib/sh d
-lib/termcap d
-lib/tilde d
-po d
-support d
-tests d
-tests/misc d
-ABOUT-NLS f
-ChangeLog s CWRU/changelog
-CHANGES f
-COMPAT f
-COPYING f
-INSTALL f
-MANIFEST f
-NEWS f
-NOTES f
-POSIX f
-README f
-RBASH f
-AUTHORS f
-Y2K f
-configure.in f
-configure f 755
-Makefile.in f
-config-top.h f
-config-bot.h f
-config.h.in f
-aclocal.m4 f
-array.c f
-arrayfunc.c f
-assoc.c f
-eval.c f
-print_cmd.c f
-general.c f
-list.c f
-locale.c f
-stringlib.c f
-variables.c f
-make_cmd.c f
-copy_cmd.c f
-unwind_prot.c f
-dispose_cmd.c f
-bashhist.c f
-hashcmd.c f
-hashlib.c f
-parse.y f
-pathexp.c f
-subst.c f
-shell.c f
-trap.c f
-sig.c f
-siglist.c f
-version.c f
-flags.c f
-jobs.c f
-input.c f
-mailcheck.c f
-test.c f
-expr.c f
-alias.c f
-execute_cmd.c f
-findcmd.c f
-redir.c f
-bashline.c f
-braces.c f
-bracecomp.c f
-nojobs.c f
-error.c f
-xmalloc.c f
-pcomplete.c f
-pcomplib.c f
-mksyntax.c f
-alias.h f
-builtins.h f
-bashhist.h f
-bashline.h f
-conftypes.h f
-patchlevel.h f
-variables.h f
-array.h f
-arrayfunc.h f
-assoc.h f
-jobs.h f
-findcmd.h f
-hashlib.h f
-quit.h f
-flags.h f
-shell.h f
-syntax.h f
-pathexp.h f
-parser.h f
-pcomplete.h f
-sig.h f
-test.h f
-trap.h f
-general.h f
-unwind_prot.h f
-input.h f
-error.h f
-command.h f
-externs.h f
-siglist.h f
-subst.h f
-dispose_cmd.h f
-hashcmd.h f
-bashansi.h f
-bashjmp.h f
-bashintl.h f
-make_cmd.h f
-execute_cmd.h f
-redir.h f
-bashtypes.h f
-mailcheck.h f
-xmalloc.h f
-y.tab.c f
-y.tab.h f
-parser-built f
-pathnames.h.in f
-builtins/Makefile.in f
-builtins/alias.def f
-builtins/bind.def f
-builtins/break.def f
-builtins/builtin.def f
-builtins/caller.def f
-builtins/cd.def f
-builtins/colon.def f
-builtins/command.def f
-builtins/complete.def f
-builtins/common.c f
-builtins/declare.def f
-builtins/echo.def f
-builtins/enable.def f
-builtins/eval.def f
-builtins/evalfile.c f
-builtins/evalstring.c f
-builtins/exec.def f
-builtins/exit.def f
-builtins/fc.def f
-builtins/fg_bg.def f
-builtins/getopt.c f
-builtins/getopt.h f
-builtins/getopts.def f
-builtins/hash.def f
-builtins/help.def f
-builtins/let.def f
-builtins/history.def f
-builtins/jobs.def f
-builtins/kill.def f
-builtins/mapfile.def f
-builtins/mkbuiltins.c f
-builtins/printf.def f
-builtins/pushd.def f
-builtins/read.def f
-builtins/reserved.def f
-builtins/return.def f
-builtins/set.def f
-builtins/setattr.def f
-builtins/shift.def f
-builtins/shopt.def f
-builtins/source.def f
-builtins/suspend.def f
-builtins/test.def f
-builtins/times.def f
-builtins/trap.def f
-builtins/type.def f
-builtins/ulimit.def f
-builtins/umask.def f
-builtins/wait.def f
-builtins/psize.c f
-builtins/psize.sh f
-builtins/inlib.def f
-builtins/bashgetopt.c f
-builtins/common.h f
-builtins/bashgetopt.h f
-cross-build/cygwin32.cache f
-cross-build/x86-beos.cache f
-cross-build/opennt.cache f
-include/ansi_stdlib.h f
-include/chartypes.h f
-include/filecntl.h f
-include/gettext.h f
-include/maxpath.h f
-include/memalloc.h f
-include/ocache.h f
-include/posixdir.h f
-include/posixjmp.h f
-include/posixselect.h f
-include/posixstat.h f
-include/posixtime.h f
-include/posixwait.h f
-include/shmbchar.h f
-include/shmbutil.h f
-include/shtty.h f
-include/stdc.h f
-include/systimes.h f
-include/typemax.h f
-include/unionwait.h f
-lib/glob/Makefile.in f
-lib/glob/sm_loop.c f
-lib/glob/smatch.c f
-lib/glob/strmatch.c f
-lib/glob/strmatch.h f
-lib/glob/glob.c f
-lib/glob/glob.h f
-lib/glob/glob_loop.c f
-lib/glob/gmisc.c f
-lib/glob/xmbsrtowcs.c f
-lib/glob/collsyms.h f
-lib/glob/doc/Makefile f
-lib/glob/doc/glob.texi f
-lib/glob/ndir.h f
-lib/intl/ChangeLog f
-lib/intl/Makefile.in f
-lib/intl/VERSION f
-lib/intl/bindtextdom.c f
-lib/intl/config.charset f
-lib/intl/dcgettext.c f
-lib/intl/dcigettext.c f
-lib/intl/dcngettext.c f
-lib/intl/dgettext.c f
-lib/intl/dngettext.c f
-lib/intl/eval-plural.h f
-lib/intl/explodename.c f
-lib/intl/finddomain.c f
-lib/intl/gettext.c f
-lib/intl/gettextP.h f
-lib/intl/gmo.h f
-lib/intl/hash-string.h f
-lib/intl/intl-compat.c f
-lib/intl/l10nflist.c f
-lib/intl/libgnuintl.h.in f
-lib/intl/loadinfo.h f
-lib/intl/loadmsgcat.c f
-lib/intl/localcharset.c f
-lib/intl/localcharset.h f
-lib/intl/locale.alias f
-lib/intl/localealias.c f
-lib/intl/localename.c f
-lib/intl/log.c f
-lib/intl/ngettext.c f
-lib/intl/os2compat.c f
-lib/intl/os2compat.h f
-lib/intl/osdep.c f
-lib/intl/plural-exp.c f
-lib/intl/plural-exp.h f
-lib/intl/plural.c f
-lib/intl/plural.y f
-lib/intl/ref-add.sin f
-lib/intl/ref-del.sin f
-lib/intl/relocatable.c f
-lib/intl/relocatable.h f
-lib/intl/textdomain.c f
-lib/malloc/Makefile.in f
-lib/malloc/getpagesize.h f
-lib/malloc/imalloc.h f
-lib/malloc/mstats.h f
-lib/malloc/shmalloc.h f
-lib/malloc/table.h f
-lib/malloc/watch.h f
-lib/malloc/alloca.c f
-lib/malloc/malloc.c f
-lib/malloc/stats.c f
-lib/malloc/table.c f
-lib/malloc/trace.c f
-lib/malloc/watch.c f
-lib/malloc/xmalloc.c f
-lib/malloc/xleaktrace f 755
-lib/malloc/stub.c f
-lib/malloc/i386-alloca.s f
-lib/malloc/x386-alloca.s f
-lib/readline/COPYING f
-lib/readline/Makefile.in f
-lib/readline/ChangeLog f
-lib/readline/README f
-lib/readline/STANDALONE f
-lib/readline/readline.c f
-lib/readline/vi_mode.c f
-lib/readline/emacs_keymap.c f
-lib/readline/vi_keymap.c f
-lib/readline/history.c f
-lib/readline/histexpand.c f
-lib/readline/histsearch.c f
-lib/readline/histfile.c f
-lib/readline/funmap.c f
-lib/readline/keymaps.c f
-lib/readline/util.c f
-lib/readline/terminal.c f
-lib/readline/xfree.c f
-lib/readline/xmalloc.c f
-lib/readline/search.c f
-lib/readline/isearch.c f
-lib/readline/parens.c f
-lib/readline/rltty.c f
-lib/readline/compat.c f
-lib/readline/complete.c f
-lib/readline/bind.c f
-lib/readline/display.c f
-lib/readline/signals.c f
-lib/readline/kill.c f
-lib/readline/text.c f
-lib/readline/undo.c f
-lib/readline/macro.c f
-lib/readline/input.c f
-lib/readline/callback.c f
-lib/readline/mbutil.c f
-lib/readline/misc.c f
-lib/readline/nls.c f
-lib/readline/shell.c f
-lib/readline/savestring.c f
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-tests/run-posixpipe f
-tests/run-precedence f
-tests/run-printf f
-tests/run-quote f
-tests/run-read f
-tests/run-redir f
-tests/run-rhs-exp f
-tests/run-rsh f
-tests/run-set-e f
-tests/run-set-x f
-tests/run-shopt f
-tests/run-strip f
-tests/run-test f
-tests/run-tilde f
-tests/run-tilde2 f
-tests/run-trap f
-tests/run-type f
-tests/run-varenv f
-tests/run-vredir f
-tests/set-e.tests f
-tests/set-e1.sub f
-tests/set-e2.sub f
-tests/set-e.right f
-tests/set-x.tests f
-tests/set-x1.sub f
-tests/set-x.right f
-tests/shopt.tests f
-tests/shopt.right f
-tests/strip.tests f
-tests/strip.right f
-tests/test.tests f
-tests/test.right f
-tests/tilde.tests f
-tests/tilde.right f
-tests/tilde2.tests f
-tests/tilde2.right f
-tests/trap.tests f
-tests/trap.right f
-tests/trap1.sub f 755
-tests/trap2.sub f 755
-tests/trap2a.sub f 755
-tests/trap3.sub f
-tests/type.tests f
-tests/type.right f
-tests/type1.sub f
-tests/type2.sub f
-tests/type3.sub f
-tests/type4.sub f
-tests/varenv.right f
-tests/varenv.sh f
-tests/varenv1.sub f
-tests/varenv2.sub f
-tests/version f
-tests/version.mini f
-tests/vredir.tests f
-tests/vredir.right f
-tests/vredir1.sub f
-tests/vredir2.sub f
-tests/vredir3.sub f
-tests/vredir4.sub f
-tests/vredir5.sub f
-tests/vredir6.sub f
-tests/misc/dev-tcp.tests f
-tests/misc/perf-script f
-tests/misc/perftest f
-tests/misc/read-nchars.tests f
-tests/misc/redir-t2.sh f
-tests/misc/run-r2.sh f
-tests/misc/sigint-1.sh f
-tests/misc/sigint-2.sh f
-tests/misc/sigint-3.sh f
-tests/misc/sigint-4.sh f
-tests/misc/test-minus-e.1 f
-tests/misc/test-minus-e.2 f
-tests/misc/wait-bg.tests f
-examples/scripts.v2/PERMISSION f
-examples/scripts.v2/README f
-examples/scripts.v2/arc2tarz f
-examples/scripts.v2/bashrand f
-examples/scripts.v2/cal2day.bash f
-examples/scripts.v2/cdhist.bash f
-examples/scripts.v2/corename f
-examples/scripts.v2/fman f
-examples/scripts.v2/frcp f
-examples/scripts.v2/lowercase f
-examples/scripts.v2/ncp f
-examples/scripts.v2/newext f
-examples/scripts.v2/nmv f
-examples/scripts.v2/pages f
-examples/scripts.v2/pf f
-examples/scripts.v2/ren f
-examples/scripts.v2/rename f
-examples/scripts.v2/repeat f
-examples/scripts.v2/untar f
-examples/scripts.v2/uudec f
-examples/scripts.v2/uuenc f
-examples/scripts.v2/vtree f
-examples/scripts.v2/where f
-examples/scripts.v2/pmtop f
-examples/scripts.v2/shprof f
-examples/scripts.noah/PERMISSION f
-examples/scripts.noah/README f
-examples/scripts.noah/aref.bash f
-examples/scripts.noah/bash.sub.bash f
-examples/scripts.noah/bash_version.bash f
-examples/scripts.noah/meta.bash f
-examples/scripts.noah/mktmp.bash f
-examples/scripts.noah/number.bash f
-examples/scripts.noah/prompt.bash f
-examples/scripts.noah/remap_keys.bash f
-examples/scripts.noah/require.bash f
-examples/scripts.noah/send_mail.bash f
-examples/scripts.noah/shcat.bash f
-examples/scripts.noah/source.bash f
-examples/scripts.noah/string.bash f
-examples/scripts.noah/stty.bash f
-examples/scripts.noah/y_or_n_p.bash f
+++ /dev/null
-# Makefile for bash-4.2, version 4.4
-#
-# Copyright (C) 1996-2010 Free Software Foundation, Inc.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-# Make sure the first target in the makefile is the right one
-all: .made
-
-PACKAGE = @PACKAGE_NAME@
-VERSION = @PACKAGE_VERSION@
-
-PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
-PACKAGE_NAME = @PACKAGE_NAME@
-PACKAGE_STRING = @PACKAGE_STRING@
-PACKAGE_VERSION = @PACKAGE_VERSION@
-
-# Include some boilerplate Gnu makefile definitions.
-prefix = @prefix@
-
-exec_prefix = @exec_prefix@
-
-datarootdir = @datarootdir@
-
-bindir = @bindir@
-libdir = @libdir@
-infodir = @infodir@
-includedir = @includedir@
-datadir = @datadir@
-localedir = @localedir@
-
-mandir = @mandir@
-manpfx = man
-
-man1ext = .1
-man1dir = $(mandir)/$(manpfx)1
-man3ext = .3
-man3dir = $(mandir)/$(manpfx)3
-
-htmldir = @htmldir@
-
-# Support an alternate destination root directory for package building
-DESTDIR =
-
-topdir = @top_srcdir@
-BUILD_DIR = @BUILD_DIR@
-top_builddir = @BUILD_DIR@
-srcdir = @srcdir@
-VPATH = .:@srcdir@
-
-@SET_MAKE@
-CC = @CC@
-CC_FOR_BUILD = @CC_FOR_BUILD@
-YACC = @YACC@
-SHELL = @MAKE_SHELL@
-CP = cp
-RM = rm -f
-AR = @AR@
-ARFLAGS = @ARFLAGS@
-RANLIB = @RANLIB@
-SIZE = @SIZE@
-
-INSTALL = @INSTALL@
-INSTALL_PROGRAM = @INSTALL_PROGRAM@
-INSTALL_SCRIPT = @INSTALL_SCRIPT@
-INSTALL_DATA = @INSTALL_DATA@
-INSTALLMODE= -m 0755
-INSTALLMODE2 = -m 0555
-
-TESTSCRIPT = @TESTSCRIPT@
-
-DEBUGGER_START_FILE = @DEBUGGER_START_FILE@
-
-#If you have purify, and want to use it, uncomment this definition or
-# run the make as `make PURIFY=purify'
-# or run configure with the --with-purify argument.
-PURIFY = @PURIFY@
-
-# Here is a rule for making .o files from .c files that does not
-# force the type of the machine (like -M_MACHINE) into the flags.
-.c.o:
- $(RM) $@
- $(CC) $(CCFLAGS) -c $<
-
-EXEEXT = @EXEEXT@
-OBJEXT = @OBJEXT@
-
-# The name of this program and some version information.
-VERSPROG = bashversion$(EXEEXT)
-VERSOBJ = bashversion.$(OBJEXT)
-
-Program = bash$(EXEEXT)
-Version = @BASHVERS@
-PatchLevel = `$(BUILD_DIR)/$(VERSPROG) -p`
-RELSTATUS = @RELSTATUS@
-
-Machine = @host_cpu@
-OS = @host_os@
-VENDOR = @host_vendor@
-MACHTYPE = @host@
-
-# comment out for release
-DEBUG = @DEBUG@
-MALLOC_DEBUG = @MALLOC_DEBUG@
-
-THIS_SH = $(BUILD_DIR)/$(Program)
-
-# PROFILE_FLAGS is either -pg, to generate profiling info for use
-# with gprof, or nothing (the default).
-PROFILE_FLAGS= @PROFILE_FLAGS@
-
-CFLAGS = @CFLAGS@
-CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@ @CROSS_COMPILE@
-CPPFLAGS = @CPPFLAGS@
-CPPFLAGS_FOR_BUILD = @CPPFLAGS_FOR_BUILD@
-LOCAL_CFLAGS = @LOCAL_CFLAGS@ ${DEBUG} ${MALLOC_DEBUG}
-DEFS = @DEFS@
-LOCAL_DEFS = @LOCAL_DEFS@
-
-LOCALE_DEFS = -DLOCALEDIR='"$(localedir)"' -DPACKAGE='"$(PACKAGE)"'
-
-LOCAL_LIBS = @LOCAL_LIBS@
-LIBS = $(BUILTINS_LIB) $(LIBRARIES) @LIBS@
-LIBS_FOR_BUILD =
-
-STATIC_LD = @STATIC_LD@
-LOCAL_LDFLAGS = @LOCAL_LDFLAGS@
-
-SYSTEM_FLAGS = -DPROGRAM='"$(Program)"' -DCONF_HOSTTYPE='"$(Machine)"' -DCONF_OSTYPE='"$(OS)"' -DCONF_MACHTYPE='"$(MACHTYPE)"' -DCONF_VENDOR='"$(VENDOR)"' $(LOCALE_DEFS)
-
-BASE_CCFLAGS = $(PROFILE_FLAGS) $(SYSTEM_FLAGS) $(LOCAL_DEFS) \
- $(DEFS) $(LOCAL_CFLAGS) $(INCLUDES)
-
-CCFLAGS = $(BASE_CCFLAGS) $(CPPFLAGS) $(CFLAGS)
-
-CCFLAGS_FOR_BUILD = $(BASE_CCFLAGS) $(CPPFLAGS_FOR_BUILD) $(CFLAGS_FOR_BUILD)
-
-LDFLAGS = @LDFLAGS@ $(STATIC_LD) $(LOCAL_LDFLAGS) $(PROFILE_FLAGS) $(CFLAGS)
-LDFLAGS_FOR_BUILD = @LDFLAGS_FOR_BUILD@ $(LOCAL_LDFLAGS) $(CFLAGS_FOR_BUILD)
-
-INCLUDES = -I. @RL_INCLUDE@ -I$(srcdir) -I$(BASHINCDIR) -I$(LIBSRC) $(INTL_INC)
-
-# Maybe add: -Wextra
-GCC_LINT_FLAGS = -O -Wall -Wshadow -Wpointer-arith -Wcast-qual -Wno-parentheses \
- -Wcast-align -Wstrict-prototypes -Wconversion -Wformat \
- -Wformat-nonliteral -Wmissing-braces -Wuninitialized \
- -Wmissing-declarations -Winline \
- -Wmissing-prototypes -Wtraditional -Wredundant-decls -pedantic
-
-GCC_LINT_CFLAGS = $(BASE_CCFLAGS) $(CPPFLAGS) $(GCC_LINT_FLAGS)
-
-#
-# Support libraries
-#
-
-dot = .
-
-LIBSUBDIR = lib
-LIBSRC = $(srcdir)/$(LIBSUBDIR)
-
-LIBBUILD = ${BUILD_DIR}/${LIBSUBDIR}
-
-SUBDIR_INCLUDES = -I. @RL_INCLUDE@ -I$(topdir) -I$(topdir)/$(LIBSUBDIR)
-
-BUILD_INCLUDED_LIBINTL = @BUILD_INCLUDED_LIBINTL@
-USE_INCLUDED_LIBINTL = @USE_INCLUDED_LIBINTL@
-
-# the bash library
-# the library is a mix of functions that the C library does not provide on
-# some platforms and general shell utility functions
-SH_LIBSRC = $(LIBSRC)/sh
-SH_LIBDIR = $(dot)/${LIBSUBDIR}/sh
-SH_ABSSRC = ${topdir}/${SH_LIBSRC}
-
-SHLIB_SOURCE = ${SH_LIBSRC}/clktck.c ${SH_LIBSRC}/getcwd.c \
- ${SH_LIBSRC}/getenv.c ${SH_LIBSRC}/oslib.c \
- ${SH_LIBSRC}/setlinebuf.c ${SH_LIBSRC}/strchrnul.c \
- ${SH_LIBSRC}/strcasecmp.c ${SH_LIBSRC}/strerror.c \
- ${SH_LIBSRC}/strtod.c ${SH_LIBSRC}/strtol.c \
- ${SH_LIBSRC}/strtoul.c ${SH_LIBSRC}/vprint.c \
- ${SH_LIBSRC}/itos.c ${SH_LIBSRC}/rename.c \
- ${SH_LIBSRC}/zread.c ${SH_LIBSRC}/zwrite.c \
- ${SH_LIBSRC}/shtty.c ${SH_LIBSRC}/inet_aton.c \
- ${SH_LIBSRC}/netopen.c ${SH_LIBSRC}/strpbrk.c \
- ${SH_LIBSRC}/timeval.c ${SH_LIBSRC}/clock.c \
- ${SH_LIBSRC}/makepath.c ${SH_LIBSRC}/pathcanon.c \
- ${SH_LIBSRC}/pathphys.c ${SH_LIBSRC}/stringlist.c \
- ${SH_LIBSRC}/stringvec.c ${SH_LIBSRC}/tmpfile.c \
- ${SH_LIBSRC}/spell.c ${SH_LIBSRC}/strtrans.c \
- ${SH_LIBSRC}/strcasestr.c ${SH_LIBSRC}/shquote.c \
- ${SH_LIBSRC}/snprintf.c ${SH_LIBSRC}/mailstat.c \
- ${SH_LIBSRC}/fmtulong.c ${SH_LIBSRC}/fmtullong.c \
- ${SH_LIBSRC}/strtoll.c ${SH_LIBSRC}/strtoull.c \
- ${SH_LIBSRC}/strtoimax.c ${SH_LIBSRC}/strtoumax.c \
- ${SH_LIBSRC}/fmtumax.c ${SH_LIBSRC}/netconn.c \
- ${SH_LIBSRC}/mktime.c ${SH_LIBSRC}/strftime.c \
- ${SH_LIBSRC}/memset.c ${SH_LIBSRC}/mbschr.c \
- ${SH_LIBSRC}/zcatfd.c ${SH_LIBSRC}/shmatch.c \
- ${SH_LIBSRC}/strnlen.c ${SH_LIBSRC}/winsize.c \
- ${SH_LIBSRC}/eaccess.c ${SH_LIBSRC}/wcsdup.c \
- ${SH_LIBSRC}/zmapfd.c ${SH_LIBSRC}/fpurge.c \
- ${SH_LIBSRC}/zgetline.c ${SH_LIBSRC}/mbscmp.c \
- ${SH_LIBSRC}/casemod.c ${SH_LIBSRC}/uconvert.c \
- ${SH_LIBSRC}/ufuncs.c ${SH_LIBSRC}/dprintf.c \
- ${SH_LIBSRC}/input_avail.c ${SH_LIBSRC}/mbscasecmp.c \
- ${SH_LIBSRC}/fnxform.c ${SH_LIBSRC}/unicode.c \
- ${SH_LIBSRC}/wcswidth.c ${SH_LIBSRC}/shmbchar.c
-
-SHLIB_LIB = -lsh
-SHLIB_LIBNAME = libsh.a
-SHLIB_LIBRARY = ${SH_LIBDIR}/${SHLIB_LIBNAME}
-SHLIB_LDFLAGS = -L${SH_LIBDIR}
-SHLIB_DEP = ${SHLIB_LIBRARY}
-
-# we assume for now that readline source is being shipped with bash
-RL_LIBSRC = $(LIBSRC)/readline
-RL_LIBDOC = $(RL_LIBSRC)/doc
-RL_LIBDIR = @RL_LIBDIR@
-RL_ABSSRC = ${topdir}/$(RL_LIBDIR)
-
-RL_INCLUDEDIR = @RL_INCLUDEDIR@
-
-READLINE_LIB = @READLINE_LIB@
-READLINE_LIBRARY = $(RL_LIBDIR)/libreadline.a
-READLINE_LDFLAGS = -L${RL_LIBDIR}
-READLINE_DEP = @READLINE_DEP@
-
-# The source, object and documentation of the GNU Readline library.
-READLINE_SOURCE = $(RL_LIBSRC)/rldefs.h $(RL_LIBSRC)/rlconf.h \
- $(RL_LIBSRC)/readline.h $(RL_LIBSRC)/tcap.h \
- $(RL_LIBSRC)/chardefs.h $(RL_LIBSRC)/keymaps.h \
- $(RL_LIBSRC)/history.h $(RL_LIBSRC)/histlib.h \
- $(RL_LIBSRC)/posixstat.h $(RL_LIBSRC)/tilde.h \
- $(RL_LIBSRC)/rlstdc.h ${RL_LIBSRC}/xmalloc.h \
- $(RL_LIBSRC)/rlshell.h ${RL_LIBSRC}/rlprivate.h \
- $(RL_LIBSRC)/funmap.c $(RL_LIBSRC)/emacs_keymap.c \
- $(RL_LIBSRC)/search.c $(RL_LIBSRC)/vi_keymap.c \
- $(RL_LIBSRC)/keymaps.c $(RL_LIBSRC)/parens.c \
- $(RL_LIBSRC)/vi_mode.c $(RL_LIBSRC)/callback.c \
- $(RL_LIBSRC)/readline.c $(RL_LIBSRC)/tilde.c \
- $(RL_LIBSRC)/rltty.c $(RL_LIBSRC)/complete.c \
- $(RL_LIBSRC)/bind.c $(RL_LIBSRC)/isearch.c \
- $(RL_LIBSRC)/display.c $(RL_LIBSRC)/signals.c \
- $(RL_LIBSRC)/util.c $(RL_LIBSRC)/kill.c $(RL_LIBSRC)/text.c \
- $(RL_LIBSRC)/undo.c $(RL_LIBSRC)/macro.c \
- $(RL_LIBSRC)/terminal.c $(RL_LIBSRC)/nls.c \
- $(RL_LIBSRC)/input.c $(RL_LIBSRC)/xmalloc.c \
- $(RL_LIBSRC)/shell.c $(RL_LIBSRC)/savestring.c \
- $(RL_LIBSRC)/misc.c $(RL_LIBSRC)/mbutil.c $(RL_LIBSRC)/compat.c \
- $(RL_LIBSRC)/histexpand.c $(RL_LIBSRC)/history.c \
- $(RL_LIBSRC)/histsearch.c $(RL_LIBSRC)/histfile.c
-
-READLINE_OBJ = $(RL_LIBDIR)/readline.o $(RL_LIBDIR)/funmap.o \
- $(RL_LIBDIR)/parens.o $(RL_LIBDIR)/search.o \
- $(RL_LIBDIR)/keymaps.o $(RL_LIBDIR)/xmalloc.o \
- $(RL_LIBDIR)/rltty.o $(RL_LIBDIR)/complete.o \
- $(RL_LIBDIR)/bind.o $(RL_LIBDIR)/isearch.o \
- $(RL_LIBDIR)/display.o $(RL_LIBDIR)/signals.o \
- $(RL_LIBDIR)/tilde.o $(RL_LIBDIR)/util.o \
- $(RL_LIBDIR)/kill.o $(RL_LIBDIR)/undo.o $(RL_LIBDIR)/nls.o \
- $(RL_LIBDIR)/macro.o $(RL_LIBDIR)/input.o \
- $(RL_LIBDIR)/terminal.o $(RL_LIBDIR)/callback.o \
- $(RL_LIBDIR)/shell.o $(RL_LIBDIR)/savestring.o \
- $(RL_LIBDIR)/mbutil.o $(RL_LIBDIR)/compat.o \
- $(RL_LIBDIR)/history.o $(RL_LIBDIR)/histexpand.o \
- $(RL_LIBDIR)/histsearch.o $(RL_LIBDIR)/histfile.o
-
-HIST_LIBSRC = $(LIBSRC)/readline
-HIST_LIBDIR = @HIST_LIBDIR@
-HIST_ABSSRC = ${topdir}/$(HIST_LIBDIR)
-
-HISTORY_LIB = @HISTORY_LIB@
-HISTORY_LIBRARY = $(HIST_LIBDIR)/libhistory.a
-HISTORY_LDFLAGS = -L$(HIST_LIBDIR)
-HISTORY_DEP = @HISTORY_DEP@
-
-# The source, object and documentation of the history library.
-HISTORY_SOURCE = $(HIST_LIBSRC)/history.c $(HIST_LIBSRC)/histexpand.c \
- $(HIST_LIBSRC)/histsearch.c $(HIST_LIBSRC)/histfile.c \
- $(HIST_LIBSRC)/shell.c \
- $(HIST_LIBSRC)/history.h $(HIST_LIBSRC)/histlib.h
-HISTORY_OBJ = $(HIST_LIBDIR)/history.o $(HIST_LIBDIR)/histexpand.o \
- $(HIST_LIBDIR)/histsearch.o $(HIST_LIBDIR)/histfile.o \
- $(HIST_LIBDIR)/shell.o
-
-# You only need termcap (or curses) if you are linking with GNU Readline.
-TERM_LIBSRC = $(LIBSRC)/termcap
-TERM_LIBDIR = $(dot)/$(LIBSUBDIR)/termcap
-TERM_ABSSRC = ${topdir}/$(TERM_LIBDIR)
-
-TERMCAP_LIB = @TERMCAP_LIB@
-TERMCAP_LIBRARY = $(TERM_LIBDIR)/libtermcap.a
-TERMCAP_LDFLAGS = -L$(TERM_LIBDIR)
-TERMCAP_DEP = @TERMCAP_DEP@
-
-TERMCAP_SOURCE = $(TERM_LIBSRC)/termcap.c $(TERM_LIBSRC)/tparam.c
-TERMCAP_OBJ = $(TERM_LIBDIR)/termcap.o $(TERM_LIBDIR)/tparam.o
-
-GLOB_LIBSRC = $(LIBSRC)/glob
-GLOB_LIBDIR = $(dot)/$(LIBSUBDIR)/glob
-GLOB_ABSSRC = ${topdir}/$(GLOB_LIBDIR)
-
-GLOB_LIB = -lglob
-GLOB_LIBRARY = $(GLOB_LIBDIR)/libglob.a
-GLOB_LDFLAGS = -L$(GLOB_LIBDIR)
-GLOB_DEP = $(GLOB_LIBRARY)
-
-GLOB_SOURCE = $(GLOB_LIBSRC)/glob.c $(GLOB_LIBSRC)/strmatch.c \
- $(GLOB_LIBSRC)/smatch.c $(GLOB_LIBSRC)/xmbsrtowcs.c \
- $(GLOB_LIBSRC)/glob_loop.c $(GLOB_LIBSRC)/sm_loop.c \
- $(GLOB_LIBSRC)/gmisc.c \
- $(GLOB_LIBSRC)/glob.h $(GLOB_LIBSRC)/strmatch.h
-GLOB_OBJ = $(GLOB_LIBDIR)/glob.o $(GLOB_LIBDIR)/strmatch.o \
- $(GLOB_LIBDIR)/smatch.o $(GLOB_LIBDIR)/xmbsrtowcs.o \
- $(GLOB_LIBDIR)/gmisc.o
-
-# The source, object and documentation for the GNU Tilde library.
-TILDE_LIBSRC = $(LIBSRC)/tilde
-TILDE_LIBDIR = $(dot)/$(LIBSUBDIR)/tilde
-TILDE_ABSSRC = ${topdir}/$(TILDE_LIBDIR)
-
-TILDE_LIB = @TILDE_LIB@
-TILDE_LIBRARY = $(TILDE_LIBDIR)/libtilde.a
-TILDE_LDFLAGS = -L$(TILDE_LIBDIR)
-TILDE_DEP = $(TILDE_LIBRARY)
-
-TILDE_SOURCE = $(TILDE_LIBSRC)/tilde.c $(TILDE_LIBSRC)/tilde.h
-TILDE_OBJ = $(TILDE_LIBDIR)/tilde.o
-
-# libintl
-INTL_LIBSRC = $(LIBSRC)/intl
-INTL_LIBDIR = $(dot)/$(LIBSUBDIR)/intl
-INTL_ABSSRC = ${topdir}/$(INTL_LIB)
-INTL_BUILDDIR = ${LIBBUILD}/intl
-
-INTL_LIB = @LIBINTL@
-INTL_LIBRARY = $(INTL_LIBDIR)/libintl.a
-INTL_DEP = @INTL_DEP@
-INTL_INC = @INTL_INC@
-
-LIBINTL_H = @LIBINTL_H@
-
-# libiconv
-LIBICONV = @LIBICONV@
-
-# tests
-LIBINTL = @LIBINTL@
-LTLIBINTL = @LTLIBINTL@
-INTLLIBS = @INTLLIBS@
-INTLOBJS = @INTLOBJS@
-
-# Our malloc.
-MALLOC_TARGET = @MALLOC_TARGET@
-
-# set to alloca.o if we are using the C alloca in lib/malloc
-ALLOCA = @ALLOCA@
-
-ALLOC_LIBSRC = $(LIBSRC)/malloc
-ALLOC_LIBDIR = $(dot)/$(LIBSUBDIR)/malloc
-ALLOC_ABSSRC = ${topdir}/$(ALLOC_LIBDIR)
-
-MALLOC_SRC = @MALLOC_SRC@
-MALLOC_OTHERSRC = ${ALLOC_LIBSRC}/trace.c ${ALLOC_LIBSRC}/stats.c \
- ${ALLOC_LIBSRC}/table.c ${ALLOC_LIBSRC}/watch.c
-MALLOC_SOURCE = ${ALLOC_LIBSRC}/${MALLOC_SRC} ${MALLOC_OTHERSRC}
-MALLOC_CFLAGS = -DRCHECK -Dbotch=programming_error ${MALLOC_DEBUG}
-
-MALLOC_LIB = @MALLOC_LIB@
-MALLOC_LIBRARY = @MALLOC_LIBRARY@
-MALLOC_LDFLAGS = @MALLOC_LDFLAGS@
-MALLOC_DEP = @MALLOC_DEP@
-
-ALLOC_HEADERS = $(ALLOC_LIBSRC)/getpagesize.h $(ALLOC_LIBSRC)/shmalloc.h \
- $(ALLOC_LIBSRC)/imalloc.h $(ALLOC_LIBSRC)/mstats.h \
- $(ALLOC_LIBSRC)/table.h $(ALLOC_LIBSRC)/watch.h
-
-$(MALLOC_LIBRARY): ${MALLOC_SOURCE} ${ALLOC_HEADERS} config.h
- @(cd $(ALLOC_LIBDIR) && \
- $(MAKE) $(MFLAGS) \
- MALLOC_CFLAGS="$(MALLOC_CFLAGS)" ${MALLOC_TARGET} ) || exit 1
-
-BASHINCDIR = ${srcdir}/include
-BASHINCFILES = $(BASHINCDIR)/posixstat.h $(BASHINCDIR)/ansi_stdlib.h \
- $(BASHINCDIR)/filecntl.h $(BASHINCDIR)/posixdir.h \
- $(BASHINCDIR)/memalloc.h $(BASHINCDIR)/stdc.h \
- $(BASHINCDIR)/posixjmp.h $(BASHINCDIR)/posixwait.h \
- $(BASHINCDIR)/posixtime.h $(BASHINCDIR)/systimes.h \
- $(BASHINCDIR)/unionwait.h $(BASHINCDIR)/maxpath.h \
- $(BASHINCDIR)/shtty.h $(BASHINCDIR)/typemax.h \
- $(BASHINCDIR)/ocache.h
-
-LIBRARIES = $(GLOB_LIB) $(SHLIB_LIB) $(READLINE_LIB) $(HISTORY_LIB) $(TERMCAP_LIB) \
- $(TILDE_LIB) $(MALLOC_LIB) $(INTL_LIB) $(LIBICONV) $(LOCAL_LIBS)
-
-LIBDEP = $(GLOB_DEP) $(SHLIB_DEP) $(INTL_DEP) $(READLINE_DEP) $(HISTORY_DEP) $(TERMCAP_DEP) \
- $(TILDE_DEP) $(MALLOC_DEP)
-
-LIBRARY_LDFLAGS = $(READLINE_LDFLAGS) $(HISTORY_LDFLAGS) $(GLOB_LDFLAGS) \
- $(TILDE_LDFLAGS) $(MALLOC_LDFLAGS) $(SHLIB_LDFLAGS)
-
-#
-# The shell itself
-#
-
-# The main source code for the Bourne Again SHell.
-CSOURCES = shell.c eval.c parse.y general.c make_cmd.c print_cmd.c y.tab.c \
- dispose_cmd.c execute_cmd.c variables.c $(GLOBC) version.c \
- expr.c copy_cmd.c flags.c subst.c hashcmd.c hashlib.c mailcheck.c \
- test.c trap.c alias.c jobs.c nojobs.c $(ALLOC_FILES) braces.c \
- input.c bashhist.c array.c arrayfunc.c assoc.c sig.c pathexp.c \
- unwind_prot.c siglist.c bashline.c bracecomp.c error.c \
- list.c stringlib.c locale.c findcmd.c redir.c \
- pcomplete.c pcomplib.c syntax.c xmalloc.c
-
-HSOURCES = shell.h flags.h trap.h hashcmd.h hashlib.h jobs.h builtins.h \
- general.h variables.h config.h $(ALLOC_HEADERS) alias.h \
- quit.h unwind_prot.h syntax.h ${GRAM_H} \
- command.h input.h error.h bashansi.h dispose_cmd.h make_cmd.h \
- subst.h externs.h siglist.h bashhist.h bashline.h bashtypes.h \
- array.h arrayfunc.h sig.h mailcheck.h bashintl.h bashjmp.h \
- execute_cmd.h parser.h pathexp.h pathnames.h pcomplete.h assoc.h \
- $(BASHINCFILES)
-
-SOURCES = $(CSOURCES) $(HSOURCES) $(BUILTIN_DEFS)
-
-# header files chosen based on running of configure
-SIGNAMES_H = @SIGNAMES_H@
-
-# object files chosen based on running of configure
-JOBS_O = @JOBS_O@
-SIGLIST_O = @SIGLIST_O@
-SIGNAMES_O = @SIGNAMES_O@
-
-# Matching object files.
-OBJECTS = shell.o eval.o y.tab.o general.o make_cmd.o print_cmd.o $(GLOBO) \
- dispose_cmd.o execute_cmd.o variables.o copy_cmd.o error.o \
- expr.o flags.o $(JOBS_O) subst.o hashcmd.o hashlib.o mailcheck.o \
- trap.o input.o unwind_prot.o pathexp.o sig.o test.o version.o \
- alias.o array.o arrayfunc.o assoc.o braces.o bracecomp.o bashhist.o \
- bashline.o $(SIGLIST_O) list.o stringlib.o locale.o findcmd.o redir.o \
- pcomplete.o pcomplib.o syntax.o xmalloc.o $(SIGNAMES_O)
-
-# Where the source code of the shell builtins resides.
-BUILTIN_SRCDIR=$(srcdir)/builtins
-DEFSRC=$(BUILTIN_SRCDIR)
-BUILTIN_ABSSRC=${topdir}/builtins
-DEFDIR = $(dot)/builtins
-DEBUGGER_DIR = $(dot)/debugger
-
-BUILTIN_DEFS = $(DEFSRC)/alias.def $(DEFSRC)/bind.def $(DEFSRC)/break.def \
- $(DEFSRC)/builtin.def $(DEFSRC)/cd.def $(DEFSRC)/colon.def \
- $(DEFSRC)/command.def ${DEFSRC}/complete.def \
- $(DEFSRC)/caller.def $(DEFSRC)/declare.def \
- $(DEFSRC)/echo.def $(DEFSRC)/enable.def $(DEFSRC)/eval.def \
- $(DEFSRC)/exec.def $(DEFSRC)/exit.def $(DEFSRC)/fc.def \
- $(DEFSRC)/fg_bg.def $(DEFSRC)/hash.def $(DEFSRC)/help.def \
- $(DEFSRC)/history.def $(DEFSRC)/jobs.def $(DEFSRC)/kill.def \
- $(DEFSRC)/let.def $(DEFSRC)/read.def $(DEFSRC)/return.def \
- $(DEFSRC)/set.def $(DEFSRC)/setattr.def $(DEFSRC)/shift.def \
- $(DEFSRC)/source.def $(DEFSRC)/suspend.def $(DEFSRC)/test.def \
- $(DEFSRC)/times.def $(DEFSRC)/trap.def $(DEFSRC)/type.def \
- $(DEFSRC)/ulimit.def $(DEFSRC)/umask.def $(DEFSRC)/wait.def \
- $(DEFSRC)/getopts.def $(DEFSRC)/reserved.def \
- $(DEFSRC)/pushd.def $(DEFSRC)/shopt.def $(DEFSRC)/printf.def \
- $(DEFSRC)/mapfile.def
-BUILTIN_C_SRC = $(DEFSRC)/mkbuiltins.c $(DEFSRC)/common.c \
- $(DEFSRC)/evalstring.c $(DEFSRC)/evalfile.c \
- $(DEFSRC)/bashgetopt.c $(GETOPT_SOURCE)
-BUILTIN_C_OBJ = $(DEFDIR)/common.o $(DEFDIR)/evalstring.o \
- $(DEFDIR)/evalfile.o $(DEFDIR)/bashgetopt.o
-BUILTIN_OBJS = $(DEFDIR)/alias.o $(DEFDIR)/bind.o $(DEFDIR)/break.o \
- $(DEFDIR)/builtin.o $(DEFDIR)/cd.o $(DEFDIR)/colon.o \
- $(DEFDIR)/command.o $(DEFDIR)/caller.o $(DEFDIR)/declare.o \
- $(DEFDIR)/echo.o $(DEFDIR)/enable.o $(DEFDIR)/eval.o \
- $(DEFDIR)/exec.o $(DEFDIR)/exit.o $(DEFDIR)/fc.o \
- $(DEFDIR)/fg_bg.o $(DEFDIR)/hash.o $(DEFDIR)/help.o \
- $(DEFDIR)/history.o $(DEFDIR)/jobs.o $(DEFDIR)/kill.o \
- $(DEFDIR)/let.o $(DEFDIR)/pushd.o $(DEFDIR)/read.o \
- $(DEFDIR)/return.o $(DEFDIR)/shopt.o $(DEFDIR)/printf.o \
- $(DEFDIR)/set.o $(DEFDIR)/setattr.o $(DEFDIR)/shift.o \
- $(DEFDIR)/source.o $(DEFDIR)/suspend.o $(DEFDIR)/test.o \
- $(DEFDIR)/times.o $(DEFDIR)/trap.o $(DEFDIR)/type.o \
- $(DEFDIR)/ulimit.o $(DEFDIR)/umask.o $(DEFDIR)/wait.o \
- $(DEFDIR)/getopts.o $(DEFDIR)/mapfile.o $(BUILTIN_C_OBJ)
-GETOPT_SOURCE = $(DEFSRC)/getopt.c $(DEFSRC)/getopt.h
-PSIZE_SOURCE = $(DEFSRC)/psize.sh $(DEFSRC)/psize.c
-
-BUILTINS_LIBRARY = $(DEFDIR)/libbuiltins.a
-BUILTINS_LIB = -lbuiltins
-BUILTINS_LDFLAGS = -L$(DEFDIR)
-BUILTINS_DEP = $(BUILTINS_LIBRARY)
-
-# Documentation for the shell.
-DOCSRC = $(srcdir)/doc
-DOCDIR = $(dot)/doc
-
-# Translations and other i18n support files
-PO_SRC = $(srcdir)/po/
-PO_DIR = $(dot)/po/
-
-SIGNAMES_SUPPORT = $(SUPPORT_SRC)mksignames.c
-
-SUPPORT_SRC = $(srcdir)/support/
-SDIR = $(dot)/support/
-
-TESTS_SUPPORT = recho$(EXEEXT) zecho$(EXEEXT) printenv$(EXEEXT) xcase$(EXEEXT)
-CREATED_SUPPORT = signames.h recho$(EXEEXT) zecho$(EXEEXT) printenv$(EXEEXT) \
- tests/recho$(EXEEXT) tests/zecho$(EXEEXT) \
- tests/printenv$(EXEEXT) xcase$(EXEEXT) tests/xcase$(EXEEXT) \
- mksignames$(EXEEXT) lsignames.h \
- mksyntax${EXEEXT} syntax.c $(VERSPROG) $(VERSOBJ) \
- buildversion.o mksignames.o signames.o buildsignames.o
-CREATED_CONFIGURE = config.h config.cache config.status config.log \
- stamp-h po/POTFILES config.status.lineno
-CREATED_MAKEFILES = Makefile builtins/Makefile doc/Makefile \
- lib/readline/Makefile lib/glob/Makefile \
- lib/sh/Makefile lib/tilde/Makefile lib/malloc/Makefile \
- lib/termcap/Makefile examples/loadables/Makefile \
- examples/loadables/perl/Makefile support/Makefile \
- lib/intl/Makefile po/Makefile po/Makefile.in
-
-# Keep GNU Make from exporting the entire environment for small machines.
-.NOEXPORT:
-
-.made: $(Program) bashbug
- @echo "$(Program) last made for a $(Machine) running $(OS)" >.made
-
-$(Program): .build $(OBJECTS) $(BUILTINS_DEP) $(LIBDEP)
- $(RM) $@
- $(PURIFY) $(CC) $(BUILTINS_LDFLAGS) $(LIBRARY_LDFLAGS) $(LDFLAGS) -o $(Program) $(OBJECTS) $(LIBS)
- ls -l $(Program)
- -$(SIZE) $(Program)
-
-.build: $(SOURCES) config.h Makefile version.h $(VERSPROG)
- @echo
- @echo " ***********************************************************"
- @echo " * *"
- @echo " * `$(BUILD_DIR)/$(VERSPROG) -l`"
- @echo " * *"
- @echo " ***********************************************************"
- @echo
-
-bashbug: $(SUPPORT_SRC)bashbug.sh config.h Makefile $(VERSPROG)
- @sed -e "s%!MACHINE!%$(Machine)%" -e "s%!OS!%$(OS)%" \
- -e "s%!CFLAGS!%$(CCFLAGS)%" -e "s%!CC!%$(CC)%" \
- -e "s%!RELEASE!%$(Version)%" -e "s%!PATCHLEVEL!%$(PatchLevel)%" \
- -e "s%!MACHTYPE!%$(MACHTYPE)%" -e "s%!RELSTATUS!%$(RELSTATUS)%" \
- $(SUPPORT_SRC)bashbug.sh > $@
- @chmod a+rx bashbug
-
-strip: $(Program) .made
- strip $(Program)
- ls -l $(Program)
- -$(SIZE) $(Program)
-
-lint:
- ${MAKE} ${MFLAGS} CFLAGS='${GCC_LINT_FLAGS}' .made
-
-version.h: $(SOURCES) config.h Makefile patchlevel.h
- $(SHELL) $(SUPPORT_SRC)mkversion.sh -b -S ${topdir} -s $(RELSTATUS) -d $(Version) -o newversion.h \
- && mv newversion.h version.h
-
-bashversion$(EXEEXT): patchlevel.h conftypes.h version.h buildversion.o $(SUPPORT_SRC)bashversion.c
- $(CC_FOR_BUILD) $(CCFLAGS_FOR_BUILD) -o $@ $(SUPPORT_SRC)bashversion.c buildversion.o ${LIBS_FOR_BUILD}
-
-buildversion.o: version.h conftypes.h patchlevel.h $(srcdir)/version.c
- $(CC_FOR_BUILD) $(CCFLAGS_FOR_BUILD) -DBUILDTOOL -c -o $@ $(srcdir)/version.c
-
-# old rules
-GRAM_H = parser-built
-y.tab.o: y.tab.c ${GRAM_H} command.h ${BASHINCDIR}/stdc.h input.h
-${GRAM_H}: y.tab.h
- @-if test -f y.tab.h ; then \
- cmp -s $@ y.tab.h 2>/dev/null || cp -p y.tab.h $@; \
- fi
-y.tab.c y.tab.h: parse.y
-# -if test -f y.tab.h; then mv -f y.tab.h old-y.tab.h; fi
- $(YACC) -d $(srcdir)/parse.y
- touch parser-built
-# -if cmp -s old-y.tab.h y.tab.h; then mv old-y.tab.h y.tab.h; else cp -p y.tab.h ${GRAM_H}; fi
-
-# experimental new rules - work with GNU make but not BSD (or OSF) make
-#y.tab.o: y.tab.c y.tab.h
-#y.tab.c y.tab.h: parse.y command.h ${BASHINCDIR}/stdc.h input.h
-# -if test -f y.tab.h; then mv -f y.tab.h old-y.tab.h; fi
-# $(YACC) -d $(srcdir)/parse.y
-# -if cmp -s old-y.tab.h y.tab.h; then mv old-y.tab.h y.tab.h; fi
-
-$(READLINE_LIBRARY): config.h $(READLINE_SOURCE)
- @echo making $@ in ${RL_LIBDIR}
- @( { test "${RL_LIBDIR}" = "${libdir}" && exit 0; } || \
- cd ${RL_LIBDIR} && $(MAKE) $(MFLAGS) libreadline.a) || exit 1
-
-$(HISTORY_LIBRARY): config.h $(HISTORY_SOURCE) $(READLINE_DEP)
- @echo making $@ in ${HIST_LIBDIR}
- @( { test "${HIST_LIBDIR}" = "${libdir}" && exit 0; } || \
- cd ${HIST_LIBDIR} && $(MAKE) $(MFLAGS) libhistory.a) || exit 1
-
-$(GLOB_LIBRARY): config.h $(GLOB_SOURCE)
- @echo making $@ in ${GLOB_LIBDIR}
- @(cd ${GLOB_LIBDIR} && \
- $(MAKE) $(MFLAGS) DEBUG=${DEBUG} libglob.a) || exit 1
-
-$(TILDE_LIBRARY): config.h $(TILDE_SOURCE)
- @echo making $@ in ${TILDE_LIBDIR}
- @(cd ${TILDE_LIBDIR} && \
- $(MAKE) $(MFLAGS) libtilde.a) || exit 1
-
-$(TERMCAP_LIBRARY): config.h ${TERMCAP_SOURCE}
- @echo making $@ in ${TERM_LIBDIR}
- @(cd ${TERM_LIBDIR} && \
- $(MAKE) $(MFLAGS) libtermcap.a) || exit 1
-
-$(SHLIB_LIBRARY): config.h ${SHLIB_SOURCE}
- @echo making $@ in ${SH_LIBDIR}
- @(cd ${SH_LIBDIR} && \
- $(MAKE) $(MFLAGS) DEBUG=${DEBUG} ${SHLIB_LIBNAME}) || exit 1
-
-${INTL_LIBRARY}: config.h ${INTL_LIBDIR}/Makefile
- @echo making $@ in ${INTL_LIBDIR}
- @(cd ${INTL_LIBDIR} && \
- $(MAKE) $(MFLAGS) all) || exit 1
-
-${LIBINTL_H}: ${INTL_DEP}
-
-signames.o: $(SUPPORT_SRC)signames.c
- $(RM) $@
- $(CC) $(CCFLAGS) -c $(SUPPORT_SRC)signames.c
-
-buildsignames.o: $(SUPPORT_SRC)signames.c
- $(RM) $@
- $(CC_FOR_BUILD) $(CCFLAGS_FOR_BUILD) -DBUILDTOOL -o $@ -c $(SUPPORT_SRC)signames.c
-
-mksignames.o: $(SUPPORT_SRC)mksignames.c
- $(RM) $@
- $(CC_FOR_BUILD) $(CCFLAGS_FOR_BUILD) -DBUILDTOOL -c $(SUPPORT_SRC)mksignames.c
-
-mksignames$(EXEEXT): mksignames.o buildsignames.o
- $(RM) $@
- $(CC_FOR_BUILD) $(CCFLAGS_FOR_BUILD) -o $@ mksignames.o buildsignames.o ${LIBS_FOR_BUILD}
-
-mksyntax$(EXEEXT): ${srcdir}/mksyntax.c config.h syntax.h ${BASHINCDIR}/chartypes.h
- $(RM) $@
- ${CC_FOR_BUILD} ${CCFLAGS_FOR_BUILD} -o $@ ${srcdir}/mksyntax.c ${LIBS_FOR_BUILD}
-
-# make a list of signals for the local system -- this is done when we're
-# *not* cross-compiling
-lsignames.h: mksignames$(EXEEXT)
- $(RM) $@
- ./mksignames$(EXEEXT) $@
-
-# copy the correct signames header file to signames.h
-signames.h: $(SIGNAMES_H)
- -if cmp -s $(SIGNAMES_H) $@ ; then :; else $(RM) $@ ; $(CP) $(SIGNAMES_H) $@ ; fi
-
-syntax.c: mksyntax${EXEEXT} $(srcdir)/syntax.h
- $(RM) $@
- ./mksyntax$(EXEEXT) -o $@
-
-$(BUILTINS_LIBRARY): $(BUILTIN_DEFS) $(BUILTIN_C_SRC) config.h ${BASHINCDIR}/memalloc.h version.h
- @(cd $(DEFDIR) && $(MAKE) $(MFLAGS) DEBUG=${DEBUG} libbuiltins.a ) || exit 1
-
-# these require special rules to circumvent make builtin rules
-${DEFDIR}/common.o: $(BUILTIN_SRCDIR)/common.c
- @(cd $(DEFDIR) && $(MAKE) $(MFLAGS) DEBUG=${DEBUG} common.o) || exit 1
-
-${DEFDIR}/bashgetopt.o: $(BUILTIN_SRCDIR)/bashgetopt.c
- @(cd $(DEFDIR) && $(MAKE) $(MFLAGS) DEBUG=${DEBUG} bashgetopt.o) || exit 1
-
-${DEFDIR}/builtext.h: $(BUILTIN_DEFS)
- @(cd $(DEFDIR) && $(MAKE) $(MFLAGS) builtext.h ) || exit 1
-
-# For the justification of the following Makefile rules, see node
-# `Automatic Remaking' in GNU Autoconf documentation.
-
-Makefile makefile: config.status $(srcdir)/Makefile.in
- CONFIG_FILES=Makefile CONFIG_HEADERS= $(SHELL) ./config.status
-
-Makefiles makefiles: config.status $(srcdir)/Makefile.in
- @for mf in $(CREATED_MAKEFILES); do \
- CONFIG_FILES=$$mf CONFIG_HEADERS= $(SHELL) ./config.status ; \
- done
-
-config.h: stamp-h
-
-stamp-h: config.status $(srcdir)/config.h.in $(srcdir)/config-top.h $(srcdir)/config-bot.h
- CONFIG_FILES= CONFIG_HEADERS=config.h $(SHELL) ./config.status
-
-config.status: $(srcdir)/configure
- $(SHELL) ./config.status --recheck
-
-pathnames.h: Makefile $(srcdir)/pathnames.h.in
- @sed -e 's|@DEBUGGER_START_FILE\@|${DEBUGGER_START_FILE}|g' $(srcdir)/pathnames.h.in > pathnames.tmp
- @if test -f $@; then \
- cmp -s pathnames.tmp $@ || mv pathnames.tmp $@; \
- else \
- mv pathnames.tmp $@; \
- fi
- @${RM} pathnames.tmp
-
-# comment out for distribution
-$(srcdir)/configure: $(srcdir)/configure.in $(srcdir)/aclocal.m4 $(srcdir)/config.h.in
- cd $(srcdir) && autoconf
-
-# for chet
-reconfig: force
- sh $(srcdir)/configure -C
-
-#newversion: mkversion
-# $(RM) .build
-# ./mkversion -dir $(srcdir) -dist
-# mv -f newversion.h version.h
-# $(MAKE) -f $(srcdir)/Makefile $(MFLAGS) srcdir=$(srcdir)
-
-doc documentation: force
- @(cd $(DOCDIR) ; $(MAKE) $(MFLAGS) )
-
-info dvi ps: force
- @(cd $(DOCDIR) ; $(MAKE) $(MFLAGS) CFLAGS='$(CCFLAGS)' $@ )
-
-force:
-
-TAGS: $(SOURCES) $(BUILTIN_C_SRC) $(LIBRARY_SOURCE)
- etags $(SOURCES) $(BUILTIN_C_SRC) $(LIBRARY_SOURCE)
-
-tags: $(SOURCES) $(BUILTIN_C_SRC) $(LIBRARY_SOURCE)
- ctags -x $(SOURCES) $(BUILTIN_C_SRC) $(LIBRARY_SOURCE) > $@
-
-# Targets that actually do things not part of the build
-
-installdirs:
- @${SHELL} $(SUPPORT_SRC)mkinstalldirs $(DESTDIR)$(bindir)
- @${SHELL} $(SUPPORT_SRC)mkinstalldirs $(DESTDIR)$(man1dir)
- @${SHELL} $(SUPPORT_SRC)mkinstalldirs $(DESTDIR)$(infodir)
- -( cd $(PO_DIR) ; $(MAKE) $(MFLAGS) DESTDIR=$(DESTDIR) $@ )
-
-install: .made installdirs
- $(INSTALL_PROGRAM) $(INSTALLMODE) $(Program) $(DESTDIR)$(bindir)/$(Program)
- $(INSTALL_SCRIPT) $(INSTALLMODE2) bashbug $(DESTDIR)$(bindir)/bashbug
- -( cd $(DOCDIR) ; $(MAKE) $(MFLAGS) \
- man1dir=$(man1dir) man1ext=$(man1ext) \
- man3dir=$(man3dir) man3ext=$(man3ext) \
- infodir=$(infodir) htmldir=$(htmldir) DESTDIR=$(DESTDIR) $@ )
- -( cd $(DEFDIR) ; $(MAKE) $(MFLAGS) DESTDIR=$(DESTDIR) $@ )
- -( cd $(PO_DIR) ; $(MAKE) $(MFLAGS) DESTDIR=$(DESTDIR) $@ )
-
-install-strip:
- $(MAKE) $(MFLAGS) INSTALL_PROGRAM='$(INSTALL_PROGRAM) -s' \
- prefix=${prefix} exec_prefix=${exec_prefix} \
- DESTDIR=$(DESTDIR) install
-
-uninstall: .made
- $(RM) $(DESTDIR)$(bindir)/$(Program) $(DESTDIR)$(bindir)/bashbug
- -( cd $(DOCDIR) ; $(MAKE) $(MFLAGS) \
- man1dir=$(man1dir) man1ext=$(man1ext) \
- man3dir=$(man3dir) man3ext=$(man3ext) \
- infodir=$(infodir) htmldir=$(htmldir) DESTDIR=$(DESTDIR) $@ )
- -( cd $(PO_DIR) ; $(MAKE) $(MFLAGS) DESTDIR=$(DESTDIR) $@ )
-
-.PHONY: basic-clean clean realclean maintainer-clean distclean mostlyclean maybe-clean
-
-LIB_SUBDIRS = ${RL_LIBDIR} ${HIST_LIBDIR} ${TERM_LIBDIR} ${GLOB_LIBDIR} \
- ${INTL_LIBDIR} ${TILDE_LIBDIR} ${ALLOC_LIBDIR} ${SH_LIBDIR}
-
-basic-clean:
- $(RM) $(OBJECTS) $(Program) bashbug
- $(RM) .build .made version.h
-
-clean: basic-clean
- ( cd $(DOCDIR) && $(MAKE) $(MFLAGS) $@ )
- ( cd builtins && $(MAKE) $(MFLAGS) $@ )
- -( cd $(SDIR) && $(MAKE) $(MFLAGS) $@ )
- -for libdir in ${LIB_SUBDIRS}; do \
- (cd $$libdir && test -f Makefile && $(MAKE) $(MFLAGS) $@) ;\
- done
- -( cd $(PO_DIR) ; $(MAKE) $(MFLAGS) DESTDIR=$(DESTDIR) $@ )
- $(RM) $(CREATED_SUPPORT)
-
-mostlyclean: basic-clean
- ( cd $(DOCDIR) && $(MAKE) $(MFLAGS) $@ )
- ( cd builtins && $(MAKE) $(MFLAGS) $@ )
- -( cd $(SDIR) && $(MAKE) $(MFLAGS) $@ )
- -for libdir in ${LIB_SUBDIRS}; do \
- (cd $$libdir && test -f Makefile && $(MAKE) $(MFLAGS) $@) ;\
- done
- -( cd $(PO_DIR) ; $(MAKE) $(MFLAGS) DESTDIR=$(DESTDIR) $@ )
-
-distclean: basic-clean maybe-clean
- ( cd $(DOCDIR) && $(MAKE) $(MFLAGS) $@ )
- ( cd builtins && $(MAKE) $(MFLAGS) $@ )
- -( cd $(SDIR) && $(MAKE) $(MFLAGS) $@ )
- -for libdir in ${LIB_SUBDIRS}; do \
- (cd $$libdir && test -f Makefile && $(MAKE) $(MFLAGS) $@) ;\
- done
- -( cd $(PO_DIR) ; $(MAKE) $(MFLAGS) DESTDIR=$(DESTDIR) $@ )
- $(RM) $(CREATED_CONFIGURE) tags TAGS
- $(RM) $(CREATED_SUPPORT) Makefile $(CREATED_MAKEFILES) pathnames.h
-
-maintainer-clean: basic-clean
- @echo This command is intended for maintainers to use.
- @echo It deletes files that may require special tools to rebuild.
- $(RM) y.tab.c y.tab.h parser-built tags TAGS
- ( cd $(DOCDIR) && $(MAKE) $(MFLAGS) $@ )
- ( cd builtins && $(MAKE) $(MFLAGS) $@ )
- ( cd $(SDIR) && $(MAKE) $(MFLAGS) $@ )
- -for libdir in ${LIB_SUBDIRS}; do \
- (cd $$libdir && test -f Makefile && $(MAKE) $(MFLAGS) $@) ;\
- done
- -( cd $(PO_DIR) ; $(MAKE) $(MFLAGS) DESTDIR=$(DESTDIR) $@ )
- $(RM) $(CREATED_CONFIGURE) $(CREATED_MAKEFILES)
- $(RM) $(CREATED_SUPPORT) Makefile pathnames.h
-
-maybe-clean:
- -if test "X$(topdir)" != "X$(BUILD_DIR)" ; then \
- $(RM) parser-built y.tab.c y.tab.h ; \
- fi
-
-recho$(EXEEXT): $(SUPPORT_SRC)recho.c
- @$(CC_FOR_BUILD) $(CCFLAGS_FOR_BUILD) -o $@ $(SUPPORT_SRC)recho.c ${LIBS_FOR_BUILD}
-
-zecho$(EXEEXT): $(SUPPORT_SRC)zecho.c
- @$(CC_FOR_BUILD) $(CCFLAGS_FOR_BUILD) -o $@ $(SUPPORT_SRC)zecho.c ${LIBS_FOR_BUILD}
-
-printenv$(EXEEXT): $(SUPPORT_SRC)printenv.c
- @$(CC_FOR_BUILD) $(CCFLAGS_FOR_BUILD) -o $@ $(SUPPORT_SRC)printenv.c ${LIBS_FOR_BUILD}
-
-xcase$(EXEEXT): $(SUPPORT_SRC)xcase.c
- @$(CC_FOR_BUILD) $(CCFLAGS_FOR_BUILD) -o $@ $(SUPPORT_SRC)xcase.c ${LIBS_FOR_BUILD}
-
-test tests check: force $(Program) $(TESTS_SUPPORT)
- @-test -d tests || mkdir tests
- @cp $(TESTS_SUPPORT) tests
- @( cd $(srcdir)/tests && \
- PATH=$(BUILD_DIR)/tests:$$PATH THIS_SH=$(THIS_SH) $(SHELL) ${TESTSCRIPT} )
-
-symlinks:
- $(SHELL) $(SUPPORT_SRC)fixlinks -s $(srcdir)
-
-dist: force
- @echo Bash distributions are created using $(srcdir)/support/mkdist.
- @echo Here is a sample of the necessary commands:
- @echo $(Program) $(srcdir)/support/mkdist -m $(srcdir)/MANIFEST -s $(srcdir) -r ${PACKAGE} $(PACKAGE_VERSION)
- @echo tar cf $(PACKAGE)-${PACKAGE_VERSION}.tar ${PACKAGE}-$(PACKAGE_VERSION)
- @echo gzip $(PACKAGE)-$(PACKAGE_VERSION).tar
-
-depend: depends
-
-depends: force
- $(Program) $(SUPPORT_SRC)mkdep -c ${CC} -- ${CCFLAGS} ${CSOURCES}
-
-#### PRIVATE TARGETS ####
-hashtest: hashlib.c
- $(CC) -DTEST_HASHING $(CCFLAGS) -o $@ $(srcdir)/hashlib.c
-
-############################ DEPENDENCIES ###############################
-
-# Files that depend on the definitions in config-top.h, which are not meant
-# to be changed
-bashhist.o: config-top.h
-shell.o: config-top.h
-input.o: config-top.h
-y.tab.o: config-top.h
-jobs.o: config-top.h
-nojobs.o: config-top.h
-execute_cmd.o: config-top.h
-variables.o: config-top.h
-builtins/command.o: config-top.h
-builtins/common.o: config-top.h
-builtins/break.o: config-top.h
-builtins/echo.o: config-top.h
-builtins/evalstring.o: config-top.h
-builtins/exit.o: config-top.h
-builtins/kill.o: config-top.h
-
-# shell basics
-copy_cmd.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-copy_cmd.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-copy_cmd.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-copy_cmd.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-dispose_cmd.o: bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-dispose_cmd.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h
-dispose_cmd.o: error.h general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-dispose_cmd.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-dispose_cmd.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-dispose_cmd.o: ${BASHINCDIR}/ocache.h
-error.o: config.h bashtypes.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h flags.h ${BASHINCDIR}/stdc.h error.h
-error.o: command.h general.h xmalloc.h externs.h input.h bashhist.h
-error.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-error.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-error.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-error.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-error.o: input.h execute_cmd.h
-eval.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h trap.h flags.h ${DEFSRC}/common.h
-eval.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-eval.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-eval.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-eval.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-eval.o: input.h execute_cmd.h
-execute_cmd.o: config.h bashtypes.h ${BASHINCDIR}/filecntl.h ${BASHINCDIR}/posixstat.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-execute_cmd.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-execute_cmd.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-execute_cmd.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-execute_cmd.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-execute_cmd.o: ${BASHINCDIR}/memalloc.h ${GRAM_H} flags.h builtins.h jobs.h quit.h siglist.h
-execute_cmd.o: execute_cmd.h findcmd.h redir.h trap.h test.h pathexp.h
-execute_cmd.o: $(DEFSRC)/common.h ${DEFDIR}/builtext.h ${GLOB_LIBSRC}/strmatch.h
-execute_cmd.o: ${BASHINCDIR}/posixtime.h ${BASHINCDIR}/chartypes.h
-expr.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-expr.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-expr.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-expr.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-expr.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-expr.o: ${BASHINCDIR}/chartypes.h
-findcmd.o: config.h bashtypes.h ${BASHINCDIR}/filecntl.h ${BASHINCDIR}/posixstat.h bashansi.h
-findcmd.o: ${BASHINCDIR}/ansi_stdlib.h ${BASHINCDIR}/memalloc.h shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h
-findcmd.o: ${BASHINCDIR}/stdc.h error.h general.h xmalloc.h variables.h arrayfunc.h conftypes.h quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h
-findcmd.o: dispose_cmd.h make_cmd.h subst.h sig.h pathnames.h externs.h
-findcmd.o: flags.h hashlib.h pathexp.h hashcmd.h
-findcmd.o: ${BASHINCDIR}/chartypes.h
-flags.o: config.h flags.h
-flags.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-flags.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-flags.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-flags.o: make_cmd.h subst.h sig.h pathnames.h externs.h bashhist.h
-general.o: config.h bashtypes.h ${BASHINCDIR}/posixstat.h ${BASHINCDIR}/filecntl.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-general.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-general.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-general.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-general.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-general.o: ${BASHINCDIR}/maxpath.h ${BASHINCDIR}/posixtime.h
-general.o: ${BASHINCDIR}/chartypes.h
-hashcmd.o: config.h ${BASHINCDIR}/posixstat.h bashtypes.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-hashcmd.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-hashcmd.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashcmd.h
-hashcmd.o: execute_cmd.h findcmd.h ${BASHINCDIR}/stdc.h pathnames.h hashlib.h
-hashlib.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-hashlib.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-hashlib.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-hashlib.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-hashlib.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-input.o: config.h bashtypes.h ${BASHINCDIR}/filecntl.h ${BASHINCDIR}/posixstat.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-input.o: command.h ${BASHINCDIR}/stdc.h general.h xmalloc.h input.h error.h externs.h
-input.o: quit.h
-list.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-list.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-list.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-list.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-locale.o: config.h bashtypes.h bashintl.h ${LIBINTL_H} bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-locale.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-locale.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-locale.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-locale.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-locale.o: ${BASHINCDIR}/chartypes.h
-mailcheck.o: config.h bashtypes.h ${BASHINCDIR}/posixstat.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-mailcheck.o: ${BASHINCDIR}/posixtime.h
-mailcheck.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-mailcheck.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-mailcheck.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-mailcheck.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-mailcheck.o: execute_cmd.h mailcheck.h
-make_cmd.o: config.h bashtypes.h ${BASHINCDIR}/filecntl.h bashansi.h
-make_cmd.o: command.h ${BASHINCDIR}/stdc.h general.h xmalloc.h error.h flags.h make_cmd.h
-make_cmd.o: variables.h arrayfunc.h conftypes.h array.h hashlib.h subst.h input.h externs.h
-make_cmd.o: jobs.h quit.h siglist.h syntax.h dispose_cmd.h parser.h
-make_cmd.o: ${BASHINCDIR}/shmbutil.h ${BASHINCDIR}/shmbchar.h ${BASHINCDIR}/ocache.h
-y.tab.o: config.h bashtypes.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h ${BASHINCDIR}/memalloc.h
-y.tab.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-y.tab.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-y.tab.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-y.tab.o: make_cmd.h subst.h sig.h pathnames.h externs.h test.h
-y.tab.o: trap.h flags.h parser.h input.h mailcheck.h $(DEFSRC)/common.h
-y.tab.o: $(DEFDIR)/builtext.h bashline.h bashhist.h jobs.h siglist.h alias.h
-pathexp.o: config.h bashtypes.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-pathexp.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-pathexp.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-pathexp.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-pathexp.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-pathexp.o: pathexp.h flags.h
-pathexp.o: $(GLOB_LIBSRC)/glob.h $(GLOB_LIBSRC)/strmatch.h
-pathexp.o: ${BASHINCDIR}/shmbutil.h ${BASHINCDIR}/shmbchar.h
-print_cmd.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-print_cmd.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-print_cmd.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-print_cmd.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-print_cmd.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-print_cmd.o: ${GRAM_H} $(DEFSRC)/common.h
-redir.o: config.h bashtypes.h ${BASHINCDIR}/posixstat.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h ${BASHINCDIR}/filecntl.h
-redir.o: ${BASHINCDIR}/memalloc.h shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-redir.o: general.h xmalloc.h variables.h arrayfunc.h conftypes.h array.h hashlib.h quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h
-redir.o: dispose_cmd.h make_cmd.h subst.h sig.h pathnames.h externs.h
-redir.o: flags.h execute_cmd.h redir.h input.h
-shell.o: config.h bashtypes.h ${BASHINCDIR}/posixstat.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h ${BASHINCDIR}/filecntl.h
-shell.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-shell.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-shell.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-shell.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-shell.o: flags.h trap.h mailcheck.h builtins.h $(DEFSRC)/common.h
-shell.o: jobs.h siglist.h input.h execute_cmd.h findcmd.h bashhist.h bashline.h
-shell.o: ${GLOB_LIBSRC}/strmatch.h ${BASHINCDIR}/posixtime.h
-sig.o: config.h bashtypes.h
-sig.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-sig.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-sig.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-sig.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-sig.o: jobs.h siglist.h trap.h $(DEFSRC)/common.h bashline.h bashhist.h
-siglist.o: config.h bashtypes.h siglist.h trap.h
-stringlib.o: bashtypes.h ${BASHINCDIR}/chartypes.h
-stringlib.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-stringlib.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-stringlib.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-stringlib.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-stringlib.o: ${GLOB_LIBSRC}/glob.h ${GLOB_LIBSRC}/strmatch.h
-subst.o: config.h bashtypes.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h ${BASHINCDIR}/posixstat.h
-subst.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-subst.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-subst.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-subst.o: make_cmd.h subst.h sig.h pathnames.h externs.h parser.h
-subst.o: flags.h jobs.h siglist.h execute_cmd.h ${BASHINCDIR}/filecntl.h trap.h pathexp.h
-subst.o: mailcheck.h input.h $(DEFSRC)/getopt.h $(DEFSRC)/common.h
-subst.o: bashline.h bashhist.h ${GLOB_LIBSRC}/strmatch.h
-subst.o: ${BASHINCDIR}/chartypes.h
-subst.o: ${BASHINCDIR}/shmbutil.h ${BASHINCDIR}/shmbchar.h
-subst.o: ${DEFDIR}/builtext.h
-test.o: bashtypes.h ${BASHINCDIR}/posixstat.h ${BASHINCDIR}/filecntl.h
-test.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-test.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-test.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-test.o: make_cmd.h subst.h sig.h pathnames.h externs.h test.h
-test.o: ${DEFSRC}/common.h
-trap.o: config.h bashtypes.h trap.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-trap.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-trap.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-trap.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-trap.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-trap.o: signames.h $(DEFSRC)/common.h
-trap.o: ${DEFDIR}/builtext.h jobs.h
-unwind_prot.o: config.h bashtypes.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h command.h ${BASHINCDIR}/stdc.h
-unwind_prot.o: general.h xmalloc.h unwind_prot.h quit.h sig.h
-variables.o: config.h bashtypes.h ${BASHINCDIR}/posixstat.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-variables.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-variables.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-variables.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-variables.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-variables.o: flags.h execute_cmd.h mailcheck.h input.h $(DEFSRC)/common.h
-variables.o: findcmd.h bashhist.h hashcmd.h pathexp.h
-variables.o: pcomplete.h ${BASHINCDIR}/chartypes.h
-variables.o: ${BASHINCDIR}/posixtime.h assoc.h
-version.o: conftypes.h patchlevel.h version.h
-xmalloc.o: config.h bashtypes.h ${BASHINCDIR}/ansi_stdlib.h error.h
-
-# job control
-
-jobs.o: config.h bashtypes.h trap.h ${BASHINCDIR}/filecntl.h input.h ${BASHINCDIR}/shtty.h
-jobs.o: bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-jobs.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-jobs.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-jobs.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-jobs.o: execute_cmd.h make_cmd.h subst.h sig.h pathnames.h externs.h
-jobs.o: jobs.h flags.h $(DEFSRC)/common.h $(DEFDIR)/builtext.h
-jobs.o: ${BASHINCDIR}/posixwait.h ${BASHINCDIR}/unionwait.h
-jobs.o: ${BASHINCDIR}/posixtime.h
-nojobs.o: config.h bashtypes.h ${BASHINCDIR}/filecntl.h bashjmp.h ${BASHINCDIR}/posixjmp.h
-nojobs.o: command.h ${BASHINCDIR}/stdc.h general.h xmalloc.h jobs.h quit.h siglist.h externs.h
-nojobs.o: sig.h error.h ${BASHINCDIR}/shtty.h input.h
-nojobs.o: $(DEFDIR)/builtext.h
-
-# shell features that may be compiled in
-
-array.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-array.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-array.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-array.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-array.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-array.o: $(DEFSRC)/common.h
-arrayfunc.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-arrayfunc.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-arrayfunc.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-arrayfunc.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-arrayfunc.o: make_cmd.h subst.h sig.h pathnames.h externs.h pathexp.h
-arrayfunc.o: $(DEFSRC)/common.h
-arrayfunc.o: ${BASHINCDIR}/shmbutil.h ${BASHINCDIR}/shmbchar.h
-assoc.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-assoc.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h
-assoc.o: command.h ${BASHINCDIR}/stdc.h error.h
-assoc.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h
-assoc.o: assoc.h hashlib.h
-assoc.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-assoc.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-assoc.o: $(DEFSRC)/common.h
-braces.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-braces.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-braces.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-braces.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-braces.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-braces.o: ${BASHINCDIR}/shmbutil.h ${BASHINCDIR}/shmbchar.h
-alias.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h command.h ${BASHINCDIR}/stdc.h
-alias.o: general.h xmalloc.h bashtypes.h externs.h alias.h
-alias.o: pcomplete.h
-alias.o: ${BASHINCDIR}/chartypes.h
-
-pcomplib.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h bashtypes.h
-pcomplib.o: ${BASHINCDIR}/stdc.h hashlib.h pcomplete.h shell.h syntax.h
-pcomplib.o: bashjmp.h command.h general.h xmalloc.h error.h variables.h arrayfunc.h conftypes.h quit.h
-pcomplib.o: unwind_prot.h dispose_cmd.h make_cmd.h subst.h sig.h pathnames.h
-pcomplib.o: externs.h ${BASHINCDIR}/maxpath.h
-
-pcomplete.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h bashtypes.h
-pcomplete.o: ${BASHINCDIR}/stdc.h hashlib.h pcomplete.h shell.h syntax.h
-pcomplete.o: bashjmp.h command.h general.h xmalloc.h error.h variables.h arrayfunc.h conftypes.h quit.h
-pcomplete.o: unwind_prot.h dispose_cmd.h make_cmd.h subst.h sig.h pathnames.h
-pcomplete.o: externs.h ${BASHINCDIR}/maxpath.h execute_cmd.h
-
-# library support files
-
-bashhist.o: config.h bashtypes.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h ${BASHINCDIR}/posixstat.h
-bashhist.o: ${BASHINCDIR}/filecntl.h
-bashhist.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-bashhist.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-bashhist.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-bashhist.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-bashhist.o: flags.h input.h parser.h pathexp.h $(DEFSRC)/common.h bashline.h
-bashhist.o: $(GLOB_LIBSRC)/strmatch.h
-bashline.o: config.h bashtypes.h ${BASHINCDIR}/posixstat.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-bashline.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h command.h ${BASHINCDIR}/stdc.h error.h
-bashline.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h array.h hashlib.h
-bashline.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-bashline.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-bashline.o: builtins.h bashhist.h bashline.h execute_cmd.h findcmd.h pathexp.h
-bashline.o: $(DEFSRC)/common.h $(GLOB_LIBSRC)/glob.h alias.h
-bashline.o: pcomplete.h ${BASHINCDIR}/chartypes.h input.h
-bracecomp.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-bracecomp.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h
-bracecomp.o: command.h ${BASHINCDIR}/stdc.h error.h
-bracecomp.o: general.h xmalloc.h bashtypes.h variables.h arrayfunc.h conftypes.h
-bracecomp.o: array.h hashlib.h alias.h builtins.h
-bracecomp.o: quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-bracecomp.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-
-# library dependencies
-
-bashline.o: $(RL_LIBSRC)/rlconf.h
-bashline.o: $(RL_LIBSRC)/keymaps.h $(RL_LIBSRC)/rlstdc.h
-bashline.o: $(RL_LIBSRC)/chardefs.h $(RL_LIBSRC)/readline.h
-bracecomp.o: $(RL_LIBSRC)/keymaps.h $(RL_LIBSRC)/chardefs.h
-bracecomp.o: $(RL_LIBSRC)/readline.h $(RL_LIBSRC)/rlstdc.h
-y.tab.o: $(RL_LIBSRC)/keymaps.h $(RL_LIBSRC)/chardefs.h
-y.tab.o: $(RL_LIBSRC)/readline.h $(RL_LIBSRC)/rlstdc.h
-subst.o: $(RL_LIBSRC)/keymaps.h $(RL_LIBSRC)/chardefs.h
-subst.o: $(RL_LIBSRC)/readline.h $(RL_LIBSRC)/rlstdc.h
-
-shell.o: $(HIST_LIBSRC)/history.h $(HIST_LIBSRC)/rlstdc.h
-subst.o: $(HIST_LIBSRC)/history.h $(HIST_LIBSRC)/rlstdc.h
-bashline.o: $(HIST_LIBSRC)/history.h $(HIST_LIBSRC)/rlstdc.h
-bashhist.o: $(HIST_LIBSRC)/history.h $(HIST_LIBSRC)/rlstdc.h
-y.tab.o: $(HIST_LIBSRC)/history.h $(HIST_LIBSRC)/rlstdc.h
-
-execute_cmd.o: $(TILDE_LIBSRC)/tilde.h
-general.o: $(TILDE_LIBSRC)/tilde.h
-mailcheck.o: $(TILDE_LIBSRC)/tilde.h
-shell.o: $(TILDE_LIBSRC)/tilde.h
-subst.o: $(TILDE_LIBSRC)/tilde.h
-variables.o: $(TILDE_LIBSRC)/tilde.h
-
-# libintl dependencies
-arrayfunc.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-bashhist.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-bashline.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-braces.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-error.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-eval.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-execute_cmd.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-expr.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-general.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-input.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-jobs.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-mailcheck.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-make_cmd.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-nojobs.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-y.tab.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-pcomplete.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-pcomplib.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-print_cmd.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-redir.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-shell.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-sig.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-siglist.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-subst.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-test.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-trap.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-variables.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-version.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-xmalloc.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-
-signames.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-
-# XXX - dependencies checked through here
-
-# builtin c sources
-builtins/bashgetopt.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-builtins/bashgetopt.o: shell.h syntax.h config.h bashjmp.h command.h general.h xmalloc.h error.h
-builtins/bashgetopt.o: variables.h arrayfunc.h conftypes.h quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-builtins/bashgetopt.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-builtins/bashgetopt.o: $(DEFSRC)/common.h
-builtins/bashgetopt.o: ${BASHINCDIR}/chartypes.h
-builtins/common.o: bashtypes.h ${BASHINCDIR}/posixstat.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-builtins/common.o: shell.h syntax.h config.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h command.h
-builtins/common.o: ${BASHINCDIR}/memalloc.h variables.h arrayfunc.h conftypes.h input.h siglist.h
-builtins/common.o: quit.h unwind_prot.h ${BASHINCDIR}/maxpath.h jobs.h builtins.h
-builtins/common.o: dispose_cmd.h make_cmd.h subst.h externs.h bashhist.h
-builtins/common.o: execute_cmd.h ${BASHINCDIR}/stdc.h general.h xmalloc.h error.h pathnames.h
-builtins/common.o: ${DEFDIR}/builtext.h
-builtins/common.o: ${BASHINCDIR}/chartypes.h
-builtins/evalfile.o: bashtypes.h ${BASHINCDIR}/posixstat.h ${BASHINCDIR}/filecntl.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-builtins/evalfile.o: shell.h syntax.h config.h bashjmp.h command.h general.h xmalloc.h error.h
-builtins/evalfile.o: variables.h arrayfunc.h conftypes.h quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-builtins/evalfile.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-builtins/evalfile.o: jobs.h builtins.h flags.h input.h execute_cmd.h
-builtins/evalfile.o: bashhist.h $(DEFSRC)/common.h
-builtins/evalstring.o: config.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-builtins/evalstring.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h command.h siglist.h
-builtins/evalstring.o: ${BASHINCDIR}/memalloc.h variables.h arrayfunc.h conftypes.h input.h
-builtins/evalstring.o: quit.h unwind_prot.h ${BASHINCDIR}/maxpath.h jobs.h builtins.h
-builtins/evalstring.o: dispose_cmd.h make_cmd.h subst.h externs.h
-builtins/evalstring.o: jobs.h builtins.h flags.h input.h execute_cmd.h
-builtins/evalstring.o: bashhist.h $(DEFSRC)/common.h pathnames.h
-builtins/getopt.o: config.h ${BASHINCDIR}/memalloc.h
-builtins/getopt.o: shell.h syntax.h bashjmp.h command.h general.h xmalloc.h error.h
-builtins/getopt.o: variables.h arrayfunc.h conftypes.h quit.h ${BASHINCDIR}/maxpath.h unwind_prot.h dispose_cmd.h
-builtins/getopt.o: make_cmd.h subst.h sig.h pathnames.h externs.h
-builtins/getopt.o: $(DEFSRC)/getopt.h
-builtins/mkbuiltins.o: config.h bashtypes.h ${BASHINCDIR}/posixstat.h ${BASHINCDIR}/filecntl.h
-builtins/mkbuiltins.o: bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-
-# builtin def files
-builtins/alias.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/alias.o: quit.h $(DEFSRC)/common.h pathnames.h
-builtins/alias.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h command.h ${BASHINCDIR}/stdc.h unwind_prot.h
-builtins/alias.o: dispose_cmd.h make_cmd.h subst.h externs.h variables.h arrayfunc.h conftypes.h
-builtins/bind.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/bind.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/bind.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h quit.h
-builtins/bind.o: $(DEFSRC)/bashgetopt.h pathnames.h
-builtins/break.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/break.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h quit.h
-builtins/break.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/break.o: pathnames.h
-builtins/builtin.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/builtin.o: quit.h $(DEFSRC)/common.h $(DEFSRC)/bashgetopt.h
-builtins/builtin.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/builtin.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/builtin.o: pathnames.h
-builtins/caller.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/caller.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/caller.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/caller.o: $(DEFSRC)/common.h quit.h
-builtins/caller.o: ${BASHINCDIR}/chartypes.h bashtypes.h
-builtins/caller.o: ${DEFDIR}/builtext.h pathnames.h
-builtins/cd.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/cd.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/cd.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/cd.o: $(DEFSRC)/common.h quit.h pathnames.h
-builtins/command.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/command.o: quit.h $(DEFSRC)/bashgetopt.h
-builtins/command.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/command.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h pathnames.h
-builtins/declare.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/declare.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h quit.h
-builtins/declare.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/declare.o: $(DEFSRC)/bashgetopt.h pathnames.h
-builtins/echo.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/echo.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h quit.h
-builtins/echo.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/echo.o: pathnames.h
-builtins/enable.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/enable.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h quit.h
-builtins/enable.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/enable.o: pcomplete.h pathnames.h
-builtins/eval.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/eval.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h quit.h
-builtins/eval.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/eval.o: pathnames.h
-builtins/exec.o: bashtypes.h pathnames.h
-builtins/exec.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/exec.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/exec.o: dispose_cmd.h make_cmd.h subst.h externs.h execute_cmd.h
-builtins/exec.o: findcmd.h flags.h quit.h $(DEFSRC)/common.h ${BASHINCDIR}/stdc.h
-builtins/exec.o: pathnames.h
-builtins/exit.o: bashtypes.h
-builtins/exit.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/exit.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h quit.h
-builtins/exit.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/exit.o: pathnames.h
-builtins/fc.o: bashtypes.h ${BASHINCDIR}/posixstat.h
-builtins/fc.o: bashansi.h ${BASHINCDIR}/ansi_stdlib.h builtins.h command.h ${BASHINCDIR}/stdc.h
-builtins/fc.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/fc.o: flags.h unwind_prot.h variables.h arrayfunc.h conftypes.h shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h
-builtins/fc.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h quit.h
-builtins/fc.o: $(DEFSRC)/bashgetopt.h bashhist.h pathnames.h
-builtins/fc.o: ${BASHINCDIR}/chartypes.h
-builtins/fg_bg.o: bashtypes.h $(DEFSRC)/bashgetopt.h
-builtins/fg_bg.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/fg_bg.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h quit.h
-builtins/fg_bg.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/fg_bg.o: pathnames.h
-builtins/getopts.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/getopts.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h quit.h
-builtins/getopts.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/getopts.o: pathnames.h
-builtins/hash.o: bashtypes.h
-builtins/hash.o: builtins.h command.h findcmd.h ${BASHINCDIR}/stdc.h $(DEFSRC)/common.h
-builtins/hash.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/hash.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h quit.h
-builtins/hash.o: pathnames.h
-builtins/help.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/help.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/help.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h quit.h
-builtins/help.o: $(GLOB_LIBSRC)/glob.h pathnames.h
-builtins/history.o: bashtypes.h pathnames.h
-builtins/history.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/history.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/history.o: ${BASHINCDIR}/filecntl.h shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h
-builtins/history.o: bashhist.h variables.h arrayfunc.h conftypes.h
-builtins/inlib.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/inlib.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h quit.h
-builtins/inlib.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/inlib.o: pathnames.h
-builtins/jobs.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/jobs.o: quit.h $(DEFSRC)/bashgetopt.h
-builtins/jobs.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/jobs.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/jobs.o: pathnames.h
-builtins/kill.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/kill.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/kill.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h trap.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/kill.o: pathnames.h
-builtins/let.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/let.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/let.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/let.o: pathnames.h
-builtins/printf.o: config.h ${BASHINCDIR}/memalloc.h bashjmp.h command.h error.h
-builtins/printf.o: general.h xmalloc.h quit.h dispose_cmd.h make_cmd.h subst.h
-builtins/printf.o: externs.h sig.h pathnames.h shell.h syntax.h unwind_prot.h
-builtins/printf.o: variables.h arrayfunc.h conftypes.h ${BASHINCDIR}/stdc.h $(DEFSRC)/bashgetopt.h
-builtins/printf.o: ${BASHINCDIR}/chartypes.h
-builtins/pushd.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/pushd.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/pushd.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/pushd.o: $(DEFSRC)/common.h pathnames.h
-builtins/read.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/read.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/read.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/read.o: pathnames.h
-builtins/return.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/return.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/return.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/return.o: pathnames.h
-builtins/set.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/set.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/set.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h flags.h
-builtins/set.o: pathnames.h
-builtins/setattr.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/setattr.o: quit.h $(DEFSRC)/common.h $(DEFSRC)/bashgetopt.h
-builtins/setattr.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/setattr.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/setattr.o: pathnames.h
-builtins/shift.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/shift.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/shift.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/shift.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/shift.o: pathnames.h
-builtins/shopt.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h
-builtins/shopt.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h
-builtins/shopt.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h unwind_prot.h variables.h arrayfunc.h conftypes.h ${BASHINCDIR}/maxpath.h
-builtins/shopt.o: $(DEFSRC)/common.h $(DEFSRC)/bashgetopt.h pathnames.h
-builtins/shopt.o: bashhist.h
-builtins/source.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/source.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/source.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/source.o: findcmd.h $(DEFSRC)/bashgetopt.h flags.h trap.h
-builtins/source.o: pathnames.h
-builtins/suspend.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/suspend.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/suspend.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/suspend.o: pathnames.h
-builtins/test.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/test.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/test.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/test.o: test.h pathnames.h
-builtins/times.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/times.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/times.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/times.o: pathnames.h
-builtins/trap.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/trap.o: quit.h $(DEFSRC)/common.h
-builtins/trap.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/trap.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/trap.o: pathnames.h
-builtins/type.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/type.o: quit.h $(DEFSRC)/common.h findcmd.h
-builtins/type.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/type.o: dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/type.o: pathnames.h
-builtins/ulimit.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/ulimit.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/ulimit.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/ulimit.o: pathnames.h
-builtins/umask.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/umask.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/umask.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/umask.o: ${BASHINCDIR}/chartypes.h pathnames.h
-builtins/wait.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/wait.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/wait.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/wait.o: ${BASHINCDIR}/chartypes.h pathnames.h
-
-builtins/complete.o: config.h shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h
-builtins/complete.o: unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/complete.o: bashtypes.h bashansi.h ${BASHINCDIR}/ansi_stdlib.h
-builtins/complete.o: builtins.h pathnames.h
-builtins/complete.o: pcomplete.h
-builtins/complete.o: ${DEFSRC}/common.h ${DEFSRC}/bashgetopt.h
-builtins/mapfile.o: command.h config.h ${BASHINCDIR}/memalloc.h error.h general.h xmalloc.h ${BASHINCDIR}/maxpath.h
-builtins/mapfile.o: quit.h dispose_cmd.h make_cmd.h subst.h externs.h ${BASHINCDIR}/stdc.h
-builtins/mapfile.o: shell.h syntax.h bashjmp.h ${BASHINCDIR}/posixjmp.h sig.h unwind_prot.h variables.h arrayfunc.h conftypes.h
-builtins/mapfile.o: pathnames.h
-
-# libintl dependencies
-builtins/bind.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/break.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/caller.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/cd.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/common.c: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/complete.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/declare.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/enable.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/evalfile.c: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/exec.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/exit.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/fc.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/fg_bg.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/getopt.c: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/hash.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/help.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/history.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/inlib.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/jobs.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/kill.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/let.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/mapfile.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/mkbuiltins.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/printf.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/pushd.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/read.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/return.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/set.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/setattr.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/shift.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/shopt.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/source.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/suspend.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/type.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/ulimit.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-builtins/umask.o: ${topdir}/bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
-
-# builtin library dependencies
-builtins/bind.o: $(RL_LIBSRC)/chardefs.h $(RL_LIBSRC)/readline.h
-builtins/bind.o: $(RL_LIBSRC)/keymaps.h $(RL_LIBSRC)/rlstdc.h
-
-builtins/bind.o: $(HIST_LIBSRC)/history.h $(RL_LIBSRC)/rlstdc.h
-builtins/fc.o: $(HIST_LIBSRC)/history.h $(RL_LIBSRC)/rlstdc.h
-builtins/history.o: $(HIST_LIBSRC)/history.h $(RL_LIBSRC)/rlstdc.h
-
-builtins/common.o: $(TILDE_LIBSRC)/tilde.h
-builtins/cd.o: $(TILDE_LIBSRC)/tilde.h
-
-builtins/alias.o: $(DEFSRC)/alias.def
-builtins/bind.o: $(DEFSRC)/bind.def
-builtins/break.o: $(DEFSRC)/break.def
-builtins/builtin.o: $(DEFSRC)/builtin.def
-builtins/caller.o: $(DEFSRC)/caller.def
-builtins/cd.o: $(DEFSRC)/cd.def
-builtins/colon.o: $(DEFSRC)/colon.def
-builtins/command.o: $(DEFSRC)/command.def
-builtins/complete.o: $(DEFSRC)/complete.def
-builtins/declare.o: $(DEFSRC)/declare.def
-builtins/echo.o: $(DEFSRC)/echo.def
-builtins/enable.o: $(DEFSRC)/enable.def
-builtins/eval.o: $(DEFSRC)/eval.def
-builtins/exec.o: $(DEFSRC)/exec.def
-builtins/exit.o: $(DEFSRC)/exit.def
-builtins/fc.o: $(DEFSRC)/fc.def
-builtins/fg_bg.o: $(DEFSRC)/fg_bg.def
-builtins/getopts.o: $(DEFSRC)/getopts.def
-builtins/hash.o: $(DEFSRC)/hash.def
-builtins/help.o: $(DEFSRC)/help.def
-builtins/history.o: $(DEFSRC)/history.def
-builtins/inlib.o: $(DEFSRC)/inlib.def
-builtins/jobs.o: $(DEFSRC)/jobs.def
-builtins/kill.o: $(DEFSRC)/kill.def
-builtins/let.o: $(DEFSRC)/let.def
-builtins/mapfile.o: $(DEFSRC)/mapfile.def
-builtins/pushd.o: $(DEFSRC)/pushd.def
-builtins/read.o: $(DEFSRC)/read.def
-builtins/reserved.o: $(DEFSRC)/reserved.def
-builtins/return.o: $(DEFSRC)/return.def
-builtins/set.o: $(DEFSRC)/set.def
-builtins/setattr.o: $(DEFSRC)/setattr.def
-builtins/shift.o: $(DEFSRC)/shift.def
-builtins/shopt.o: $(DEFSRC)/shopt.def
-builtins/source.o: $(DEFSRC)/source.def
-builtins/suspend.o: $(DEFSRC)/suspend.def
-builtins/test.o: $(DEFSRC)/test.def
-builtins/times.o: $(DEFSRC)/times.def
-builtins/trap.o: $(DEFSRC)/trap.def
-builtins/type.o: $(DEFSRC)/type.def
-builtins/ulimit.o: $(DEFSRC)/ulimit.def
-builtins/umask.o: $(DEFSRC)/umask.def
-builtins/wait.o: $(DEFSRC)/wait.def
+++ /dev/null
-/* arrayfunc.c -- High-level array functions used by other parts of the shell. */
-
-/* Copyright (C) 2001-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#if defined (ARRAY_VARS)
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-#include <stdio.h>
-
-#include "bashintl.h"
-
-#include "shell.h"
-#include "pathexp.h"
-
-#include "shmbutil.h"
-
-#include "builtins/common.h"
-
-extern char *this_command_name;
-extern int last_command_exit_value;
-extern int array_needs_making;
-
-static SHELL_VAR *bind_array_var_internal __P((SHELL_VAR *, arrayind_t, char *, char *, int));
-
-static char *quote_assign __P((const char *));
-static void quote_array_assignment_chars __P((WORD_LIST *));
-static char *array_value_internal __P((char *, int, int, int *, arrayind_t *));
-
-/* Standard error message to use when encountering an invalid array subscript */
-const char * const bash_badsub_errmsg = N_("bad array subscript");
-
-/* **************************************************************** */
-/* */
-/* Functions to manipulate array variables and perform assignments */
-/* */
-/* **************************************************************** */
-
-/* Convert a shell variable to an array variable. The original value is
- saved as array[0]. */
-SHELL_VAR *
-convert_var_to_array (var)
- SHELL_VAR *var;
-{
- char *oldval;
- ARRAY *array;
-
- oldval = value_cell (var);
- array = array_create ();
- if (oldval)
- array_insert (array, 0, oldval);
-
- FREE (value_cell (var));
- var_setarray (var, array);
-
- /* these aren't valid anymore */
- var->dynamic_value = (sh_var_value_func_t *)NULL;
- var->assign_func = (sh_var_assign_func_t *)NULL;
-
- INVALIDATE_EXPORTSTR (var);
- if (exported_p (var))
- array_needs_making++;
-
- VSETATTR (var, att_array);
- VUNSETATTR (var, att_invisible);
-
- return var;
-}
-
-/* Convert a shell variable to an array variable. The original value is
- saved as array[0]. */
-SHELL_VAR *
-convert_var_to_assoc (var)
- SHELL_VAR *var;
-{
- char *oldval;
- HASH_TABLE *hash;
-
- oldval = value_cell (var);
- hash = assoc_create (0);
- if (oldval)
- assoc_insert (hash, savestring ("0"), oldval);
-
- FREE (value_cell (var));
- var_setassoc (var, hash);
-
- /* these aren't valid anymore */
- var->dynamic_value = (sh_var_value_func_t *)NULL;
- var->assign_func = (sh_var_assign_func_t *)NULL;
-
- INVALIDATE_EXPORTSTR (var);
- if (exported_p (var))
- array_needs_making++;
-
- VSETATTR (var, att_assoc);
- VUNSETATTR (var, att_invisible);
-
- return var;
-}
-
-static SHELL_VAR *
-bind_array_var_internal (entry, ind, key, value, flags)
- SHELL_VAR *entry;
- arrayind_t ind;
- char *key;
- char *value;
- int flags;
-{
- SHELL_VAR *dentry;
- char *newval;
-
- /* If we're appending, we need the old value of the array reference, so
- fake out make_variable_value with a dummy SHELL_VAR */
- if (flags & ASS_APPEND)
- {
- dentry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
- dentry->name = savestring (entry->name);
- if (assoc_p (entry))
- newval = assoc_reference (assoc_cell (entry), key);
- else
- newval = array_reference (array_cell (entry), ind);
- if (newval)
- dentry->value = savestring (newval);
- else
- {
- dentry->value = (char *)xmalloc (1);
- dentry->value[0] = '\0';
- }
- dentry->exportstr = 0;
- dentry->attributes = entry->attributes & ~(att_array|att_assoc|att_exported);
- /* Leave the rest of the members uninitialized; the code doesn't look
- at them. */
- newval = make_variable_value (dentry, value, flags);
- dispose_variable (dentry);
- }
- else
- newval = make_variable_value (entry, value, flags);
-
- if (entry->assign_func)
- (*entry->assign_func) (entry, newval, ind, key);
- else if (assoc_p (entry))
- assoc_insert (assoc_cell (entry), key, newval);
- else
- array_insert (array_cell (entry), ind, newval);
- FREE (newval);
-
- return (entry);
-}
-
-/* Perform an array assignment name[ind]=value. If NAME already exists and
- is not an array, and IND is 0, perform name=value instead. If NAME exists
- and is not an array, and IND is not 0, convert it into an array with the
- existing value as name[0].
-
- If NAME does not exist, just create an array variable, no matter what
- IND's value may be. */
-SHELL_VAR *
-bind_array_variable (name, ind, value, flags)
- char *name;
- arrayind_t ind;
- char *value;
- int flags;
-{
- SHELL_VAR *entry;
-
- entry = var_lookup (name, shell_variables);
-
- if (entry == (SHELL_VAR *) 0)
- entry = make_new_array_variable (name);
- else if (readonly_p (entry) || noassign_p (entry))
- {
- if (readonly_p (entry))
- err_readonly (name);
- return (entry);
- }
- else if (array_p (entry) == 0)
- entry = convert_var_to_array (entry);
-
- /* ENTRY is an array variable, and ARRAY points to the value. */
- return (bind_array_var_internal (entry, ind, 0, value, flags));
-}
-
-SHELL_VAR *
-bind_array_element (entry, ind, value, flags)
- SHELL_VAR *entry;
- arrayind_t ind;
- char *value;
- int flags;
-{
- return (bind_array_var_internal (entry, ind, 0, value, flags));
-}
-
-SHELL_VAR *
-bind_assoc_variable (entry, name, key, value, flags)
- SHELL_VAR *entry;
- char *name;
- char *key;
- char *value;
- int flags;
-{
- SHELL_VAR *dentry;
- char *newval;
-
- if (readonly_p (entry) || noassign_p (entry))
- {
- if (readonly_p (entry))
- err_readonly (name);
- return (entry);
- }
-
- return (bind_array_var_internal (entry, 0, key, value, flags));
-}
-
-/* Parse NAME, a lhs of an assignment statement of the form v[s], and
- assign VALUE to that array element by calling bind_array_variable(). */
-SHELL_VAR *
-assign_array_element (name, value, flags)
- char *name, *value;
- int flags;
-{
- char *sub, *vname, *akey;
- arrayind_t ind;
- int sublen;
- SHELL_VAR *entry;
-
- vname = array_variable_name (name, &sub, &sublen);
-
- if (vname == 0)
- return ((SHELL_VAR *)NULL);
-
- if ((ALL_ELEMENT_SUB (sub[0]) && sub[1] == ']') || (sublen <= 1))
- {
- free (vname);
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
-
- entry = find_variable (vname);
-
- if (entry && assoc_p (entry))
- {
- sub[sublen-1] = '\0';
- akey = expand_assignment_string_to_string (sub, 0); /* [ */
- sub[sublen-1] = ']';
- if (akey == 0 || *akey == 0)
- {
- free (vname);
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
- entry = bind_assoc_variable (entry, vname, akey, value, flags);
- }
- else
- {
- ind = array_expand_index (entry, sub, sublen);
- if (ind < 0)
- {
- free (vname);
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
- entry = bind_array_variable (vname, ind, value, flags);
- }
-
- free (vname);
- return (entry);
-}
-
-/* Find the array variable corresponding to NAME. If there is no variable,
- create a new array variable. If the variable exists but is not an array,
- convert it to an indexed array. If FLAGS&1 is non-zero, an existing
- variable is checked for the readonly or noassign attribute in preparation
- for assignment (e.g., by the `read' builtin). If FLAGS&2 is non-zero, we
- create an associative array. */
-SHELL_VAR *
-find_or_make_array_variable (name, flags)
- char *name;
- int flags;
-{
- SHELL_VAR *var;
-
- var = find_variable (name);
-
- if (var == 0)
- var = (flags & 2) ? make_new_assoc_variable (name) : make_new_array_variable (name);
- else if ((flags & 1) && (readonly_p (var) || noassign_p (var)))
- {
- if (readonly_p (var))
- err_readonly (name);
- return ((SHELL_VAR *)NULL);
- }
- else if ((flags & 2) && array_p (var))
- {
- report_error (_("%s: cannot convert indexed to associative array"), name);
- return ((SHELL_VAR *)NULL);
- }
- else if (array_p (var) == 0 && assoc_p (var) == 0)
- var = convert_var_to_array (var);
-
- return (var);
-}
-
-/* Perform a compound assignment statement for array NAME, where VALUE is
- the text between the parens: NAME=( VALUE ) */
-SHELL_VAR *
-assign_array_from_string (name, value, flags)
- char *name, *value;
- int flags;
-{
- SHELL_VAR *var;
- int vflags;
-
- vflags = 1;
- if (flags & ASS_MKASSOC)
- vflags |= 2;
-
- var = find_or_make_array_variable (name, vflags);
- if (var == 0)
- return ((SHELL_VAR *)NULL);
-
- return (assign_array_var_from_string (var, value, flags));
-}
-
-/* Sequentially assign the indices of indexed array variable VAR from the
- words in LIST. */
-SHELL_VAR *
-assign_array_var_from_word_list (var, list, flags)
- SHELL_VAR *var;
- WORD_LIST *list;
- int flags;
-{
- register arrayind_t i;
- register WORD_LIST *l;
- ARRAY *a;
-
- a = array_cell (var);
- i = (flags & ASS_APPEND) ? array_max_index (a) + 1 : 0;
-
- for (l = list; l; l = l->next, i++)
- if (var->assign_func)
- (*var->assign_func) (var, l->word->word, i, 0);
- else
- array_insert (a, i, l->word->word);
- return var;
-}
-
-WORD_LIST *
-expand_compound_array_assignment (var, value, flags)
- SHELL_VAR *var;
- char *value;
- int flags;
-{
- WORD_LIST *list, *nlist;
- char *val;
- int ni;
-
- /* I don't believe this condition is ever true any more. */
- if (*value == '(') /*)*/
- {
- ni = 1;
- val = extract_array_assignment_list (value, &ni);
- if (val == 0)
- return (WORD_LIST *)NULL;
- }
- else
- val = value;
-
- /* Expand the value string into a list of words, performing all the
- shell expansions including pathname generation and word splitting. */
- /* First we split the string on whitespace, using the shell parser
- (ksh93 seems to do this). */
- list = parse_string_to_word_list (val, 1, "array assign");
-
- /* If we're using [subscript]=value, we need to quote each [ and ] to
- prevent unwanted filename expansion. */
- if (list)
- quote_array_assignment_chars (list);
-
- /* Now that we've split it, perform the shell expansions on each
- word in the list. */
- nlist = list ? expand_words_no_vars (list) : (WORD_LIST *)NULL;
-
- dispose_words (list);
-
- if (val != value)
- free (val);
-
- return nlist;
-}
-
-/* Callers ensure that VAR is not NULL */
-void
-assign_compound_array_list (var, nlist, flags)
- SHELL_VAR *var;
- WORD_LIST *nlist;
- int flags;
-{
- ARRAY *a;
- HASH_TABLE *h;
- WORD_LIST *list;
- char *w, *val, *nval;
- int len, iflags;
- arrayind_t ind, last_ind;
- char *akey;
-
- a = (var && array_p (var)) ? array_cell (var) : (ARRAY *)0;
- h = (var && assoc_p (var)) ? assoc_cell (var) : (HASH_TABLE *)0;
-
- akey = (char *)0;
- ind = 0;
-
- /* Now that we are ready to assign values to the array, kill the existing
- value. */
- if ((flags & ASS_APPEND) == 0)
- {
- if (a && array_p (var))
- array_flush (a);
- else if (h && assoc_p (var))
- assoc_flush (h);
- }
-
- last_ind = (a && (flags & ASS_APPEND)) ? array_max_index (a) + 1 : 0;
-
- for (list = nlist; list; list = list->next)
- {
- iflags = flags;
- w = list->word->word;
-
- /* We have a word of the form [ind]=value */
- if ((list->word->flags & W_ASSIGNMENT) && w[0] == '[')
- {
- len = skipsubscript (w, 0, (var && assoc_p (var) != 0));
-
- /* XXX - changes for `+=' */
- if (w[len] != ']' || (w[len+1] != '=' && (w[len+1] != '+' || w[len+2] != '=')))
- {
- if (assoc_p (var))
- {
- err_badarraysub (w);
- continue;
- }
- nval = make_variable_value (var, w, flags);
- if (var->assign_func)
- (*var->assign_func) (var, nval, last_ind, 0);
- else
- array_insert (a, last_ind, nval);
- FREE (nval);
- last_ind++;
- continue;
- }
-
- if (len == 1)
- {
- err_badarraysub (w);
- continue;
- }
-
- if (ALL_ELEMENT_SUB (w[1]) && len == 2)
- {
- if (assoc_p (var))
- report_error (_("%s: invalid associative array key"), w);
- else
- report_error (_("%s: cannot assign to non-numeric index"), w);
- continue;
- }
-
- if (array_p (var))
- {
- ind = array_expand_index (var, w + 1, len);
- if (ind < 0)
- {
- err_badarraysub (w);
- continue;
- }
-
- last_ind = ind;
- }
- else if (assoc_p (var))
- {
- akey = substring (w, 1, len);
- if (akey == 0 || *akey == 0)
- {
- err_badarraysub (w);
- continue;
- }
- }
-
- /* XXX - changes for `+=' -- just accept the syntax. ksh93 doesn't do this */
- if (w[len + 1] == '+' && w[len + 2] == '=')
- {
- iflags |= ASS_APPEND;
- val = w + len + 3;
- }
- else
- val = w + len + 2;
- }
- else if (assoc_p (var))
- {
- report_error (_("%s: %s: must use subscript when assigning associative array"), var->name, w);
- continue;
- }
- else /* No [ind]=value, just a stray `=' */
- {
- ind = last_ind;
- val = w;
- }
-
- if (integer_p (var))
- this_command_name = (char *)NULL; /* no command name for errors */
- bind_array_var_internal (var, ind, akey, val, iflags);
- last_ind++;
- }
-}
-
-/* Perform a compound array assignment: VAR->name=( VALUE ). The
- VALUE has already had the parentheses stripped. */
-SHELL_VAR *
-assign_array_var_from_string (var, value, flags)
- SHELL_VAR *var;
- char *value;
- int flags;
-{
- WORD_LIST *nlist;
-
- if (value == 0)
- return var;
-
- nlist = expand_compound_array_assignment (var, value, flags);
- assign_compound_array_list (var, nlist, flags);
-
- if (nlist)
- dispose_words (nlist);
- return (var);
-}
-
-/* Quote globbing chars and characters in $IFS before the `=' in an assignment
- statement (usually a compound array assignment) to protect them from
- unwanted filename expansion or word splitting. */
-static char *
-quote_assign (string)
- const char *string;
-{
- size_t slen;
- int saw_eq;
- char *temp, *t, *subs;
- const char *s, *send;
- int ss, se;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- send = string + slen;
-
- t = temp = (char *)xmalloc (slen * 2 + 1);
- saw_eq = 0;
- for (s = string; *s; )
- {
- if (*s == '=')
- saw_eq = 1;
- if (saw_eq == 0 && *s == '[') /* looks like a subscript */
- {
- ss = s - string;
- se = skipsubscript (string, ss, 0);
- subs = substring (s, ss, se);
- *t++ = '\\';
- strcpy (t, subs);
- t += se - ss;
- *t++ = '\\';
- *t++ = ']';
- s += se + 1;
- free (subs);
- continue;
- }
- if (saw_eq == 0 && (glob_char_p (s) || isifs (*s)))
- *t++ = '\\';
-
- COPY_CHAR_P (t, s, send);
- }
- *t = '\0';
- return temp;
-}
-
-/* For each word in a compound array assignment, if the word looks like
- [ind]=value, quote globbing chars and characters in $IFS before the `='. */
-static void
-quote_array_assignment_chars (list)
- WORD_LIST *list;
-{
- char *nword;
- WORD_LIST *l;
-
- for (l = list; l; l = l->next)
- {
- if (l->word == 0 || l->word->word == 0 || l->word->word[0] == '\0')
- continue; /* should not happen, but just in case... */
- /* Don't bother if it doesn't look like [ind]=value */
- if (l->word->word[0] != '[' || mbschr (l->word->word, '=') == 0) /* ] */
- continue;
- nword = quote_assign (l->word->word);
- free (l->word->word);
- l->word->word = nword;
- }
-}
-
-/* skipsubscript moved to subst.c to use private functions. 2009/02/24. */
-
-/* This function is called with SUB pointing to just after the beginning
- `[' of an array subscript and removes the array element to which SUB
- expands from array VAR. A subscript of `*' or `@' unsets the array. */
-int
-unbind_array_element (var, sub)
- SHELL_VAR *var;
- char *sub;
-{
- int len;
- arrayind_t ind;
- char *akey;
- ARRAY_ELEMENT *ae;
-
- len = skipsubscript (sub, 0, 0);
- if (sub[len] != ']' || len == 0)
- {
- builtin_error ("%s[%s: %s", var->name, sub, _(bash_badsub_errmsg));
- return -1;
- }
- sub[len] = '\0';
-
- if (ALL_ELEMENT_SUB (sub[0]) && sub[1] == 0)
- {
- unbind_variable (var->name);
- return (0);
- }
-
- if (assoc_p (var))
- {
- akey = expand_assignment_string_to_string (sub, 0); /* [ */
- if (akey == 0 || *akey == 0)
- {
- builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
- return -1;
- }
- assoc_remove (assoc_cell (var), akey);
- free (akey);
- }
- else
- {
- ind = array_expand_index (var, sub, len+1);
- if (ind < 0)
- {
- builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
- return -1;
- }
- ae = array_remove (array_cell (var), ind);
- if (ae)
- array_dispose_element (ae);
- }
-
- return 0;
-}
-
-/* Format and output an array assignment in compound form VAR=(VALUES),
- suitable for re-use as input. */
-void
-print_array_assignment (var, quoted)
- SHELL_VAR *var;
- int quoted;
-{
- char *vstr;
-
- vstr = array_to_assign (array_cell (var), quoted);
-
- if (vstr == 0)
- printf ("%s=%s\n", var->name, quoted ? "'()'" : "()");
- else
- {
- printf ("%s=%s\n", var->name, vstr);
- free (vstr);
- }
-}
-
-/* Format and output an associative array assignment in compound form
- VAR=(VALUES), suitable for re-use as input. */
-void
-print_assoc_assignment (var, quoted)
- SHELL_VAR *var;
- int quoted;
-{
- char *vstr;
-
- vstr = assoc_to_assign (assoc_cell (var), quoted);
-
- if (vstr == 0)
- printf ("%s=%s\n", var->name, quoted ? "'()'" : "()");
- else
- {
- printf ("%s=%s\n", var->name, vstr);
- free (vstr);
- }
-}
-
-/***********************************************************************/
-/* */
-/* Utility functions to manage arrays and their contents for expansion */
-/* */
-/***********************************************************************/
-
-/* Return 1 if NAME is a properly-formed array reference v[sub]. */
-int
-valid_array_reference (name)
- char *name;
-{
- char *t;
- int r, len;
-
- t = mbschr (name, '['); /* ] */
- if (t)
- {
- *t = '\0';
- r = legal_identifier (name);
- *t = '[';
- if (r == 0)
- return 0;
- /* Check for a properly-terminated non-blank subscript. */
- len = skipsubscript (t, 0, 0);
- if (t[len] != ']' || len == 1)
- return 0;
- for (r = 1; r < len; r++)
- if (whitespace (t[r]) == 0)
- return 1;
- return 0;
- }
- return 0;
-}
-
-/* Expand the array index beginning at S and extending LEN characters. */
-arrayind_t
-array_expand_index (var, s, len)
- SHELL_VAR *var;
- char *s;
- int len;
-{
- char *exp, *t;
- int expok;
- arrayind_t val;
-
- exp = (char *)xmalloc (len);
- strncpy (exp, s, len - 1);
- exp[len - 1] = '\0';
- t = expand_arith_string (exp, 0);
- this_command_name = (char *)NULL;
- val = evalexp (t, &expok);
- free (t);
- free (exp);
- if (expok == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
-
- top_level_cleanup ();
- jump_to_top_level (DISCARD);
- }
- return val;
-}
-
-/* Return the name of the variable specified by S without any subscript.
- If SUBP is non-null, return a pointer to the start of the subscript
- in *SUBP. If LENP is non-null, the length of the subscript is returned
- in *LENP. This returns newly-allocated memory. */
-char *
-array_variable_name (s, subp, lenp)
- char *s, **subp;
- int *lenp;
-{
- char *t, *ret;
- int ind, ni;
-
- t = mbschr (s, '[');
- if (t == 0)
- {
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = 0;
- return ((char *)NULL);
- }
- ind = t - s;
- ni = skipsubscript (s, ind, 0);
- if (ni <= ind + 1 || s[ni] != ']')
- {
- err_badarraysub (s);
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = 0;
- return ((char *)NULL);
- }
-
- *t = '\0';
- ret = savestring (s);
- *t++ = '['; /* ] */
-
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = ni - ind;
-
- return ret;
-}
-
-/* Return the variable specified by S without any subscript. If SUBP is
- non-null, return a pointer to the start of the subscript in *SUBP.
- If LENP is non-null, the length of the subscript is returned in *LENP. */
-SHELL_VAR *
-array_variable_part (s, subp, lenp)
- char *s, **subp;
- int *lenp;
-{
- char *t;
- SHELL_VAR *var;
-
- t = array_variable_name (s, subp, lenp);
- if (t == 0)
- return ((SHELL_VAR *)NULL);
- var = find_variable (t);
-
- free (t);
- return (var == 0 || invisible_p (var)) ? (SHELL_VAR *)0 : var;
-}
-
-#define INDEX_ERROR() \
- do \
- { \
- if (var) \
- err_badarraysub (var->name); \
- else \
- { \
- t[-1] = '\0'; \
- err_badarraysub (s); \
- t[-1] = '['; /* ] */\
- } \
- return ((char *)NULL); \
- } \
- while (0)
-
-/* Return a string containing the elements in the array and subscript
- described by S. If the subscript is * or @, obeys quoting rules akin
- to the expansion of $* and $@ including double quoting. If RTYPE
- is non-null it gets 1 if the array reference is name[*], 2 if the
- reference is name[@], and 0 otherwise. */
-static char *
-array_value_internal (s, quoted, flags, rtype, indp)
- char *s;
- int quoted, flags, *rtype;
- arrayind_t *indp;
-{
- int len;
- arrayind_t ind;
- char *akey;
- char *retval, *t, *temp;
- WORD_LIST *l;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* Expand the index, even if the variable doesn't exist, in case side
- effects are needed, like ${w[i++]} where w is unset. */
-#if 0
- if (var == 0)
- return (char *)NULL;
-#endif
-
- if (len == 0)
- return ((char *)NULL); /* error message already printed */
-
- /* [ */
- if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']')
- {
- if (rtype)
- *rtype = (t[0] == '*') ? 1 : 2;
- if ((flags & AV_ALLOWALL) == 0)
- {
- err_badarraysub (s);
- return ((char *)NULL);
- }
- else if (var == 0 || value_cell (var) == 0) /* XXX - check for invisible_p(var) ? */
- return ((char *)NULL);
- else if (array_p (var) == 0 && assoc_p (var) == 0)
- l = add_string_to_list (value_cell (var), (WORD_LIST *)NULL);
- else if (assoc_p (var))
- {
- l = assoc_to_word_list (assoc_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *)NULL);
- }
- else
- {
- l = array_to_word_list (array_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *) NULL);
- }
-
- if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- {
- temp = string_list_dollar_star (l);
- retval = quote_string (temp);
- free (temp);
- }
- else /* ${name[@]} or unquoted ${name[*]} */
- retval = string_list_dollar_at (l, quoted);
-
- dispose_words (l);
- }
- else
- {
- if (rtype)
- *rtype = 0;
- if (var == 0 || array_p (var) || assoc_p (var) == 0)
- {
- if ((flags & AV_USEIND) == 0 || indp == 0)
- {
- ind = array_expand_index (var, t, len);
- if (ind < 0)
- {
- /* negative subscripts to indexed arrays count back from end */
- if (var && array_p (var))
- ind = array_max_index (array_cell (var)) + 1 + ind;
- if (ind < 0)
- INDEX_ERROR();
- }
- if (indp)
- *indp = ind;
- }
- else if (indp)
- ind = *indp;
- }
- else if (assoc_p (var))
- {
- t[len - 1] = '\0';
- akey = expand_assignment_string_to_string (t, 0); /* [ */
- t[len - 1] = ']';
- if (akey == 0 || *akey == 0)
- INDEX_ERROR();
- }
-
- if (var == 0 || value_cell (var) == 0) /* XXX - check invisible_p(var) ? */
- return ((char *)NULL);
- if (array_p (var) == 0 && assoc_p (var) == 0)
- return (ind == 0 ? value_cell (var) : (char *)NULL);
- else if (assoc_p (var))
- {
- retval = assoc_reference (assoc_cell (var), akey);
- free (akey);
- }
- else
- retval = array_reference (array_cell (var), ind);
- }
-
- return retval;
-}
-
-/* Return a string containing the elements described by the array and
- subscript contained in S, obeying quoting for subscripts * and @. */
-char *
-array_value (s, quoted, flags, rtype, indp)
- char *s;
- int quoted, flags, *rtype;
- arrayind_t *indp;
-{
- return (array_value_internal (s, quoted, flags|AV_ALLOWALL, rtype, indp));
-}
-
-/* Return the value of the array indexing expression S as a single string.
- If (FLAGS & AV_ALLOWALL) is 0, do not allow `@' and `*' subscripts. This
- is used by other parts of the shell such as the arithmetic expression
- evaluator in expr.c. */
-char *
-get_array_value (s, flags, rtype, indp)
- char *s;
- int flags, *rtype;
- arrayind_t *indp;
-{
- return (array_value_internal (s, 0, flags, rtype, indp));
-}
-
-char *
-array_keys (s, quoted)
- char *s;
- int quoted;
-{
- int len;
- char *retval, *t, *temp;
- WORD_LIST *l;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* [ */
- if (var == 0 || ALL_ELEMENT_SUB (t[0]) == 0 || t[1] != ']')
- return (char *)NULL;
-
- if (var_isset (var) == 0 || invisible_p (var))
- return (char *)NULL;
-
- if (array_p (var) == 0 && assoc_p (var) == 0)
- l = add_string_to_list ("0", (WORD_LIST *)NULL);
- else if (assoc_p (var))
- l = assoc_keys_to_word_list (assoc_cell (var));
- else
- l = array_keys_to_word_list (array_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *) NULL);
-
- if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- {
- temp = string_list_dollar_star (l);
- retval = quote_string (temp);
- free (temp);
- }
- else /* ${!name[@]} or unquoted ${!name[*]} */
- retval = string_list_dollar_at (l, quoted);
-
- dispose_words (l);
- return retval;
-}
-#endif /* ARRAY_VARS */
+++ /dev/null
-/* arrayfunc.c -- High-level array functions used by other parts of the shell. */
-
-/* Copyright (C) 2001-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#if defined (ARRAY_VARS)
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-#include <stdio.h>
-
-#include "bashintl.h"
-
-#include "shell.h"
-#include "pathexp.h"
-
-#include "shmbutil.h"
-
-#include "builtins/common.h"
-
-extern char *this_command_name;
-extern int last_command_exit_value;
-extern int array_needs_making;
-
-static SHELL_VAR *bind_array_var_internal __P((SHELL_VAR *, arrayind_t, char *, char *, int));
-static SHELL_VAR *assign_array_element_internal __P((SHELL_VAR *, char *, char *, char *, int, char *, int));
-
-static char *quote_assign __P((const char *));
-static void quote_array_assignment_chars __P((WORD_LIST *));
-static char *array_value_internal __P((char *, int, int, int *, arrayind_t *));
-
-/* Standard error message to use when encountering an invalid array subscript */
-const char * const bash_badsub_errmsg = N_("bad array subscript");
-
-/* **************************************************************** */
-/* */
-/* Functions to manipulate array variables and perform assignments */
-/* */
-/* **************************************************************** */
-
-/* Convert a shell variable to an array variable. The original value is
- saved as array[0]. */
-SHELL_VAR *
-convert_var_to_array (var)
- SHELL_VAR *var;
-{
- char *oldval;
- ARRAY *array;
-
- oldval = value_cell (var);
- array = array_create ();
- if (oldval)
- array_insert (array, 0, oldval);
-
- FREE (value_cell (var));
- var_setarray (var, array);
-
- /* these aren't valid anymore */
- var->dynamic_value = (sh_var_value_func_t *)NULL;
- var->assign_func = (sh_var_assign_func_t *)NULL;
-
- INVALIDATE_EXPORTSTR (var);
- if (exported_p (var))
- array_needs_making++;
-
- VSETATTR (var, att_array);
- VUNSETATTR (var, att_invisible);
-
- return var;
-}
-
-/* Convert a shell variable to an array variable. The original value is
- saved as array[0]. */
-SHELL_VAR *
-convert_var_to_assoc (var)
- SHELL_VAR *var;
-{
- char *oldval;
- HASH_TABLE *hash;
-
- oldval = value_cell (var);
- hash = assoc_create (0);
- if (oldval)
- assoc_insert (hash, savestring ("0"), oldval);
-
- FREE (value_cell (var));
- var_setassoc (var, hash);
-
- /* these aren't valid anymore */
- var->dynamic_value = (sh_var_value_func_t *)NULL;
- var->assign_func = (sh_var_assign_func_t *)NULL;
-
- INVALIDATE_EXPORTSTR (var);
- if (exported_p (var))
- array_needs_making++;
-
- VSETATTR (var, att_assoc);
- VUNSETATTR (var, att_invisible);
-
- return var;
-}
-
-static SHELL_VAR *
-bind_array_var_internal (entry, ind, key, value, flags)
- SHELL_VAR *entry;
- arrayind_t ind;
- char *key;
- char *value;
- int flags;
-{
- SHELL_VAR *dentry;
- char *newval;
-
- /* If we're appending, we need the old value of the array reference, so
- fake out make_variable_value with a dummy SHELL_VAR */
- if (flags & ASS_APPEND)
- {
- dentry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
- dentry->name = savestring (entry->name);
- if (assoc_p (entry))
- newval = assoc_reference (assoc_cell (entry), key);
- else
- newval = array_reference (array_cell (entry), ind);
- if (newval)
- dentry->value = savestring (newval);
- else
- {
- dentry->value = (char *)xmalloc (1);
- dentry->value[0] = '\0';
- }
- dentry->exportstr = 0;
- dentry->attributes = entry->attributes & ~(att_array|att_assoc|att_exported);
- /* Leave the rest of the members uninitialized; the code doesn't look
- at them. */
- newval = make_variable_value (dentry, value, flags);
- dispose_variable (dentry);
- }
- else
- newval = make_variable_value (entry, value, flags);
-
- if (entry->assign_func)
- (*entry->assign_func) (entry, newval, ind, key);
- else if (assoc_p (entry))
- assoc_insert (assoc_cell (entry), key, newval);
- else
- array_insert (array_cell (entry), ind, newval);
- FREE (newval);
-
- return (entry);
-}
-
-/* Perform an array assignment name[ind]=value. If NAME already exists and
- is not an array, and IND is 0, perform name=value instead. If NAME exists
- and is not an array, and IND is not 0, convert it into an array with the
- existing value as name[0].
-
- If NAME does not exist, just create an array variable, no matter what
- IND's value may be. */
-SHELL_VAR *
-bind_array_variable (name, ind, value, flags)
- char *name;
- arrayind_t ind;
- char *value;
- int flags;
-{
- SHELL_VAR *entry;
-
- entry = var_lookup (name, shell_variables);
-
- if (entry == (SHELL_VAR *) 0)
- entry = make_new_array_variable (name);
- else if (readonly_p (entry) || noassign_p (entry))
- {
- if (readonly_p (entry))
- err_readonly (name);
- return (entry);
- }
- else if (array_p (entry) == 0)
- entry = convert_var_to_array (entry);
-
- /* ENTRY is an array variable, and ARRAY points to the value. */
- return (bind_array_var_internal (entry, ind, 0, value, flags));
-}
-
-SHELL_VAR *
-bind_array_element (entry, ind, value, flags)
- SHELL_VAR *entry;
- arrayind_t ind;
- char *value;
- int flags;
-{
- return (bind_array_var_internal (entry, ind, 0, value, flags));
-}
-
-SHELL_VAR *
-bind_assoc_variable (entry, name, key, value, flags)
- SHELL_VAR *entry;
- char *name;
- char *key;
- char *value;
- int flags;
-{
- SHELL_VAR *dentry;
- char *newval;
-
- if (readonly_p (entry) || noassign_p (entry))
- {
- if (readonly_p (entry))
- err_readonly (name);
- return (entry);
- }
-
- return (bind_array_var_internal (entry, 0, key, value, flags));
-}
-
-/* Parse NAME, a lhs of an assignment statement of the form v[s], and
- assign VALUE to that array element by calling bind_array_variable(). */
-SHELL_VAR *
-assign_array_element (name, value, flags)
- char *name, *value;
- int flags;
-{
- char *sub, *vname;
- int sublen;
- SHELL_VAR *entry;
-
- vname = array_variable_name (name, &sub, &sublen);
-
- if (vname == 0)
- return ((SHELL_VAR *)NULL);
-
- if ((ALL_ELEMENT_SUB (sub[0]) && sub[1] == ']') || (sublen <= 1))
- {
- free (vname);
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
-
- entry = find_variable (vname);
- entry = assign_array_element_internal (entry, name, vname, sub, sublen, value, flags);
-
- free (vname);
- return entry;
-}
-
-static SHELL_VAR *
-assign_array_element_internal (entry, name, vname, sub, sublen, value, flags)
- SHELL_VAR *entry;
- char *name; /* only used for error messages */
- char *vname;
- char *sub;
- int sublen;
- char *value;
- int flags;
-{
- char *akey;
- arrayind_t ind;
-
- if (entry && assoc_p (entry))
- {
- sub[sublen-1] = '\0';
- akey = expand_assignment_string_to_string (sub, 0); /* [ */
- sub[sublen-1] = ']';
- if (akey == 0 || *akey == 0)
- {
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
- entry = bind_assoc_variable (entry, vname, akey, value, flags);
- }
- else
- {
- ind = array_expand_index (entry, sub, sublen);
- if (ind < 0)
- {
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
- entry = bind_array_variable (vname, ind, value, flags);
- }
-
- return (entry);
-}
-
-/* Find the array variable corresponding to NAME. If there is no variable,
- create a new array variable. If the variable exists but is not an array,
- convert it to an indexed array. If FLAGS&1 is non-zero, an existing
- variable is checked for the readonly or noassign attribute in preparation
- for assignment (e.g., by the `read' builtin). If FLAGS&2 is non-zero, we
- create an associative array. */
-SHELL_VAR *
-find_or_make_array_variable (name, flags)
- char *name;
- int flags;
-{
- SHELL_VAR *var;
-
- var = find_variable (name);
-
- if (var == 0)
- var = (flags & 2) ? make_new_assoc_variable (name) : make_new_array_variable (name);
- else if ((flags & 1) && (readonly_p (var) || noassign_p (var)))
- {
- if (readonly_p (var))
- err_readonly (name);
- return ((SHELL_VAR *)NULL);
- }
- else if ((flags & 2) && array_p (var))
- {
- report_error (_("%s: cannot convert indexed to associative array"), name);
- return ((SHELL_VAR *)NULL);
- }
- else if (array_p (var) == 0 && assoc_p (var) == 0)
- var = convert_var_to_array (var);
-
- return (var);
-}
-
-/* Perform a compound assignment statement for array NAME, where VALUE is
- the text between the parens: NAME=( VALUE ) */
-SHELL_VAR *
-assign_array_from_string (name, value, flags)
- char *name, *value;
- int flags;
-{
- SHELL_VAR *var;
- int vflags;
-
- vflags = 1;
- if (flags & ASS_MKASSOC)
- vflags |= 2;
-
- var = find_or_make_array_variable (name, vflags);
- if (var == 0)
- return ((SHELL_VAR *)NULL);
-
- return (assign_array_var_from_string (var, value, flags));
-}
-
-/* Sequentially assign the indices of indexed array variable VAR from the
- words in LIST. */
-SHELL_VAR *
-assign_array_var_from_word_list (var, list, flags)
- SHELL_VAR *var;
- WORD_LIST *list;
- int flags;
-{
- register arrayind_t i;
- register WORD_LIST *l;
- ARRAY *a;
-
- a = array_cell (var);
- i = (flags & ASS_APPEND) ? array_max_index (a) + 1 : 0;
-
- for (l = list; l; l = l->next, i++)
- if (var->assign_func)
- (*var->assign_func) (var, l->word->word, i, 0);
- else
- array_insert (a, i, l->word->word);
- return var;
-}
-
-WORD_LIST *
-expand_compound_array_assignment (var, value, flags)
- SHELL_VAR *var;
- char *value;
- int flags;
-{
- WORD_LIST *list, *nlist;
- char *val;
- int ni;
-
- /* I don't believe this condition is ever true any more. */
- if (*value == '(') /*)*/
- {
- ni = 1;
- val = extract_array_assignment_list (value, &ni);
- if (val == 0)
- return (WORD_LIST *)NULL;
- }
- else
- val = value;
-
- /* Expand the value string into a list of words, performing all the
- shell expansions including pathname generation and word splitting. */
- /* First we split the string on whitespace, using the shell parser
- (ksh93 seems to do this). */
- list = parse_string_to_word_list (val, 1, "array assign");
-
- /* If we're using [subscript]=value, we need to quote each [ and ] to
- prevent unwanted filename expansion. */
- if (list)
- quote_array_assignment_chars (list);
-
- /* Now that we've split it, perform the shell expansions on each
- word in the list. */
- nlist = list ? expand_words_no_vars (list) : (WORD_LIST *)NULL;
-
- dispose_words (list);
-
- if (val != value)
- free (val);
-
- return nlist;
-}
-
-/* Callers ensure that VAR is not NULL */
-void
-assign_compound_array_list (var, nlist, flags)
- SHELL_VAR *var;
- WORD_LIST *nlist;
- int flags;
-{
- ARRAY *a;
- HASH_TABLE *h;
- WORD_LIST *list;
- char *w, *val, *nval;
- int len, iflags;
- arrayind_t ind, last_ind;
- char *akey;
-
- a = (var && array_p (var)) ? array_cell (var) : (ARRAY *)0;
- h = (var && assoc_p (var)) ? assoc_cell (var) : (HASH_TABLE *)0;
-
- akey = (char *)0;
- ind = 0;
-
- /* Now that we are ready to assign values to the array, kill the existing
- value. */
- if ((flags & ASS_APPEND) == 0)
- {
- if (a && array_p (var))
- array_flush (a);
- else if (h && assoc_p (var))
- assoc_flush (h);
- }
-
- last_ind = (a && (flags & ASS_APPEND)) ? array_max_index (a) + 1 : 0;
-
- for (list = nlist; list; list = list->next)
- {
- iflags = flags;
- w = list->word->word;
-
- /* We have a word of the form [ind]=value */
- if ((list->word->flags & W_ASSIGNMENT) && w[0] == '[')
- {
- len = skipsubscript (w, 0, (var && assoc_p (var) != 0));
-
- /* XXX - changes for `+=' */
- if (w[len] != ']' || (w[len+1] != '=' && (w[len+1] != '+' || w[len+2] != '=')))
- {
- if (assoc_p (var))
- {
- err_badarraysub (w);
- continue;
- }
- nval = make_variable_value (var, w, flags);
- if (var->assign_func)
- (*var->assign_func) (var, nval, last_ind, 0);
- else
- array_insert (a, last_ind, nval);
- FREE (nval);
- last_ind++;
- continue;
- }
-
- if (len == 1)
- {
- err_badarraysub (w);
- continue;
- }
-
- if (ALL_ELEMENT_SUB (w[1]) && len == 2)
- {
- if (assoc_p (var))
- report_error (_("%s: invalid associative array key"), w);
- else
- report_error (_("%s: cannot assign to non-numeric index"), w);
- continue;
- }
-
- if (array_p (var))
- {
- ind = array_expand_index (var, w + 1, len);
- if (ind < 0)
- {
- err_badarraysub (w);
- continue;
- }
-
- last_ind = ind;
- }
- else if (assoc_p (var))
- {
- akey = substring (w, 1, len);
- if (akey == 0 || *akey == 0)
- {
- err_badarraysub (w);
- continue;
- }
- }
-
- /* XXX - changes for `+=' -- just accept the syntax. ksh93 doesn't do this */
- if (w[len + 1] == '+' && w[len + 2] == '=')
- {
- iflags |= ASS_APPEND;
- val = w + len + 3;
- }
- else
- val = w + len + 2;
- }
- else if (assoc_p (var))
- {
- report_error (_("%s: %s: must use subscript when assigning associative array"), var->name, w);
- continue;
- }
- else /* No [ind]=value, just a stray `=' */
- {
- ind = last_ind;
- val = w;
- }
-
- if (integer_p (var))
- this_command_name = (char *)NULL; /* no command name for errors */
- bind_array_var_internal (var, ind, akey, val, iflags);
- last_ind++;
- }
-}
-
-/* Perform a compound array assignment: VAR->name=( VALUE ). The
- VALUE has already had the parentheses stripped. */
-SHELL_VAR *
-assign_array_var_from_string (var, value, flags)
- SHELL_VAR *var;
- char *value;
- int flags;
-{
- WORD_LIST *nlist;
-
- if (value == 0)
- return var;
-
- nlist = expand_compound_array_assignment (var, value, flags);
- assign_compound_array_list (var, nlist, flags);
-
- if (nlist)
- dispose_words (nlist);
- return (var);
-}
-
-/* Quote globbing chars and characters in $IFS before the `=' in an assignment
- statement (usually a compound array assignment) to protect them from
- unwanted filename expansion or word splitting. */
-static char *
-quote_assign (string)
- const char *string;
-{
- size_t slen;
- int saw_eq;
- char *temp, *t, *subs;
- const char *s, *send;
- int ss, se;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- send = string + slen;
-
- t = temp = (char *)xmalloc (slen * 2 + 1);
- saw_eq = 0;
- for (s = string; *s; )
- {
- if (*s == '=')
- saw_eq = 1;
- if (saw_eq == 0 && *s == '[') /* looks like a subscript */
- {
- ss = s - string;
- se = skipsubscript (string, ss, 0);
- subs = substring (s, ss, se);
- *t++ = '\\';
- strcpy (t, subs);
- t += se - ss;
- *t++ = '\\';
- *t++ = ']';
- s += se + 1;
- free (subs);
- continue;
- }
- if (saw_eq == 0 && (glob_char_p (s) || isifs (*s)))
- *t++ = '\\';
-
- COPY_CHAR_P (t, s, send);
- }
- *t = '\0';
- return temp;
-}
-
-/* For each word in a compound array assignment, if the word looks like
- [ind]=value, quote globbing chars and characters in $IFS before the `='. */
-static void
-quote_array_assignment_chars (list)
- WORD_LIST *list;
-{
- char *nword;
- WORD_LIST *l;
-
- for (l = list; l; l = l->next)
- {
- if (l->word == 0 || l->word->word == 0 || l->word->word[0] == '\0')
- continue; /* should not happen, but just in case... */
- /* Don't bother if it doesn't look like [ind]=value */
- if (l->word->word[0] != '[' || mbschr (l->word->word, '=') == 0) /* ] */
- continue;
- nword = quote_assign (l->word->word);
- free (l->word->word);
- l->word->word = nword;
- }
-}
-
-/* skipsubscript moved to subst.c to use private functions. 2009/02/24. */
-
-/* This function is called with SUB pointing to just after the beginning
- `[' of an array subscript and removes the array element to which SUB
- expands from array VAR. A subscript of `*' or `@' unsets the array. */
-int
-unbind_array_element (var, sub)
- SHELL_VAR *var;
- char *sub;
-{
- int len;
- arrayind_t ind;
- char *akey;
- ARRAY_ELEMENT *ae;
-
- len = skipsubscript (sub, 0, 0);
- if (sub[len] != ']' || len == 0)
- {
- builtin_error ("%s[%s: %s", var->name, sub, _(bash_badsub_errmsg));
- return -1;
- }
- sub[len] = '\0';
-
- if (ALL_ELEMENT_SUB (sub[0]) && sub[1] == 0)
- {
- unbind_variable (var->name);
- return (0);
- }
-
- if (assoc_p (var))
- {
- akey = expand_assignment_string_to_string (sub, 0); /* [ */
- if (akey == 0 || *akey == 0)
- {
- builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
- return -1;
- }
- assoc_remove (assoc_cell (var), akey);
- free (akey);
- }
- else
- {
- ind = array_expand_index (var, sub, len+1);
- if (ind < 0)
- {
- builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
- return -1;
- }
- ae = array_remove (array_cell (var), ind);
- if (ae)
- array_dispose_element (ae);
- }
-
- return 0;
-}
-
-/* Format and output an array assignment in compound form VAR=(VALUES),
- suitable for re-use as input. */
-void
-print_array_assignment (var, quoted)
- SHELL_VAR *var;
- int quoted;
-{
- char *vstr;
-
- vstr = array_to_assign (array_cell (var), quoted);
-
- if (vstr == 0)
- printf ("%s=%s\n", var->name, quoted ? "'()'" : "()");
- else
- {
- printf ("%s=%s\n", var->name, vstr);
- free (vstr);
- }
-}
-
-/* Format and output an associative array assignment in compound form
- VAR=(VALUES), suitable for re-use as input. */
-void
-print_assoc_assignment (var, quoted)
- SHELL_VAR *var;
- int quoted;
-{
- char *vstr;
-
- vstr = assoc_to_assign (assoc_cell (var), quoted);
-
- if (vstr == 0)
- printf ("%s=%s\n", var->name, quoted ? "'()'" : "()");
- else
- {
- printf ("%s=%s\n", var->name, vstr);
- free (vstr);
- }
-}
-
-/***********************************************************************/
-/* */
-/* Utility functions to manage arrays and their contents for expansion */
-/* */
-/***********************************************************************/
-
-/* Return 1 if NAME is a properly-formed array reference v[sub]. */
-int
-valid_array_reference (name)
- char *name;
-{
- char *t;
- int r, len;
-
- t = mbschr (name, '['); /* ] */
- if (t)
- {
- *t = '\0';
- r = legal_identifier (name);
- *t = '[';
- if (r == 0)
- return 0;
- /* Check for a properly-terminated non-blank subscript. */
- len = skipsubscript (t, 0, 0);
- if (t[len] != ']' || len == 1)
- return 0;
- for (r = 1; r < len; r++)
- if (whitespace (t[r]) == 0)
- return 1;
- return 0;
- }
- return 0;
-}
-
-/* Expand the array index beginning at S and extending LEN characters. */
-arrayind_t
-array_expand_index (var, s, len)
- SHELL_VAR *var;
- char *s;
- int len;
-{
- char *exp, *t;
- int expok;
- arrayind_t val;
-
- exp = (char *)xmalloc (len);
- strncpy (exp, s, len - 1);
- exp[len - 1] = '\0';
- t = expand_arith_string (exp, 0);
- this_command_name = (char *)NULL;
- val = evalexp (t, &expok);
- free (t);
- free (exp);
- if (expok == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
-
- top_level_cleanup ();
- jump_to_top_level (DISCARD);
- }
- return val;
-}
-
-/* Return the name of the variable specified by S without any subscript.
- If SUBP is non-null, return a pointer to the start of the subscript
- in *SUBP. If LENP is non-null, the length of the subscript is returned
- in *LENP. This returns newly-allocated memory. */
-char *
-array_variable_name (s, subp, lenp)
- char *s, **subp;
- int *lenp;
-{
- char *t, *ret;
- int ind, ni;
-
- t = mbschr (s, '[');
- if (t == 0)
- {
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = 0;
- return ((char *)NULL);
- }
- ind = t - s;
- ni = skipsubscript (s, ind, 0);
- if (ni <= ind + 1 || s[ni] != ']')
- {
- err_badarraysub (s);
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = 0;
- return ((char *)NULL);
- }
-
- *t = '\0';
- ret = savestring (s);
- *t++ = '['; /* ] */
-
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = ni - ind;
-
- return ret;
-}
-
-/* Return the variable specified by S without any subscript. If SUBP is
- non-null, return a pointer to the start of the subscript in *SUBP.
- If LENP is non-null, the length of the subscript is returned in *LENP. */
-SHELL_VAR *
-array_variable_part (s, subp, lenp)
- char *s, **subp;
- int *lenp;
-{
- char *t;
- SHELL_VAR *var;
-
- t = array_variable_name (s, subp, lenp);
- if (t == 0)
- return ((SHELL_VAR *)NULL);
- var = find_variable (t);
-
- free (t);
- return (var == 0 || invisible_p (var)) ? (SHELL_VAR *)0 : var;
-}
-
-#define INDEX_ERROR() \
- do \
- { \
- if (var) \
- err_badarraysub (var->name); \
- else \
- { \
- t[-1] = '\0'; \
- err_badarraysub (s); \
- t[-1] = '['; /* ] */\
- } \
- return ((char *)NULL); \
- } \
- while (0)
-
-/* Return a string containing the elements in the array and subscript
- described by S. If the subscript is * or @, obeys quoting rules akin
- to the expansion of $* and $@ including double quoting. If RTYPE
- is non-null it gets 1 if the array reference is name[*], 2 if the
- reference is name[@], and 0 otherwise. */
-static char *
-array_value_internal (s, quoted, flags, rtype, indp)
- char *s;
- int quoted, flags, *rtype;
- arrayind_t *indp;
-{
- int len;
- arrayind_t ind;
- char *akey;
- char *retval, *t, *temp;
- WORD_LIST *l;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* Expand the index, even if the variable doesn't exist, in case side
- effects are needed, like ${w[i++]} where w is unset. */
-#if 0
- if (var == 0)
- return (char *)NULL;
-#endif
-
- if (len == 0)
- return ((char *)NULL); /* error message already printed */
-
- /* [ */
- if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']')
- {
- if (rtype)
- *rtype = (t[0] == '*') ? 1 : 2;
- if ((flags & AV_ALLOWALL) == 0)
- {
- err_badarraysub (s);
- return ((char *)NULL);
- }
- else if (var == 0 || value_cell (var) == 0) /* XXX - check for invisible_p(var) ? */
- return ((char *)NULL);
- else if (array_p (var) == 0 && assoc_p (var) == 0)
- l = add_string_to_list (value_cell (var), (WORD_LIST *)NULL);
- else if (assoc_p (var))
- {
- l = assoc_to_word_list (assoc_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *)NULL);
- }
- else
- {
- l = array_to_word_list (array_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *) NULL);
- }
-
- if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- {
- temp = string_list_dollar_star (l);
- retval = quote_string (temp);
- free (temp);
- }
- else /* ${name[@]} or unquoted ${name[*]} */
- retval = string_list_dollar_at (l, quoted);
-
- dispose_words (l);
- }
- else
- {
- if (rtype)
- *rtype = 0;
- if (var == 0 || array_p (var) || assoc_p (var) == 0)
- {
- if ((flags & AV_USEIND) == 0 || indp == 0)
- {
- ind = array_expand_index (var, t, len);
- if (ind < 0)
- {
- /* negative subscripts to indexed arrays count back from end */
- if (var && array_p (var))
- ind = array_max_index (array_cell (var)) + 1 + ind;
- if (ind < 0)
- INDEX_ERROR();
- }
- if (indp)
- *indp = ind;
- }
- else if (indp)
- ind = *indp;
- }
- else if (assoc_p (var))
- {
- t[len - 1] = '\0';
- akey = expand_assignment_string_to_string (t, 0); /* [ */
- t[len - 1] = ']';
- if (akey == 0 || *akey == 0)
- INDEX_ERROR();
- }
-
- if (var == 0 || value_cell (var) == 0) /* XXX - check invisible_p(var) ? */
- return ((char *)NULL);
- if (array_p (var) == 0 && assoc_p (var) == 0)
- return (ind == 0 ? value_cell (var) : (char *)NULL);
- else if (assoc_p (var))
- {
- retval = assoc_reference (assoc_cell (var), akey);
- free (akey);
- }
- else
- retval = array_reference (array_cell (var), ind);
- }
-
- return retval;
-}
-
-/* Return a string containing the elements described by the array and
- subscript contained in S, obeying quoting for subscripts * and @. */
-char *
-array_value (s, quoted, flags, rtype, indp)
- char *s;
- int quoted, flags, *rtype;
- arrayind_t *indp;
-{
- return (array_value_internal (s, quoted, flags|AV_ALLOWALL, rtype, indp));
-}
-
-/* Return the value of the array indexing expression S as a single string.
- If (FLAGS & AV_ALLOWALL) is 0, do not allow `@' and `*' subscripts. This
- is used by other parts of the shell such as the arithmetic expression
- evaluator in expr.c. */
-char *
-get_array_value (s, flags, rtype, indp)
- char *s;
- int flags, *rtype;
- arrayind_t *indp;
-{
- return (array_value_internal (s, 0, flags, rtype, indp));
-}
-
-char *
-array_keys (s, quoted)
- char *s;
- int quoted;
-{
- int len;
- char *retval, *t, *temp;
- WORD_LIST *l;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* [ */
- if (var == 0 || ALL_ELEMENT_SUB (t[0]) == 0 || t[1] != ']')
- return (char *)NULL;
-
- if (var_isset (var) == 0 || invisible_p (var))
- return (char *)NULL;
-
- if (array_p (var) == 0 && assoc_p (var) == 0)
- l = add_string_to_list ("0", (WORD_LIST *)NULL);
- else if (assoc_p (var))
- l = assoc_keys_to_word_list (assoc_cell (var));
- else
- l = array_keys_to_word_list (array_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *) NULL);
-
- if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- {
- temp = string_list_dollar_star (l);
- retval = quote_string (temp);
- free (temp);
- }
- else /* ${!name[@]} or unquoted ${!name[*]} */
- retval = string_list_dollar_at (l, quoted);
-
- dispose_words (l);
- return retval;
-}
-#endif /* ARRAY_VARS */
+++ /dev/null
-/* arrayfunc.c -- High-level array functions used by other parts of the shell. */
-
-/* Copyright (C) 2001-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#if defined (ARRAY_VARS)
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-#include <stdio.h>
-
-#include "bashintl.h"
-
-#include "shell.h"
-#include "pathexp.h"
-
-#include "shmbutil.h"
-
-#include "builtins/common.h"
-
-extern char *this_command_name;
-extern int last_command_exit_value;
-extern int array_needs_making;
-
-static SHELL_VAR *bind_array_var_internal __P((SHELL_VAR *, arrayind_t, char *, char *, int));
-static SHELL_VAR *assign_array_element_internal __P((SHELL_VAR *, char *, char *, char *, int, char *, int));
-
-static char *quote_assign __P((const char *));
-static void quote_array_assignment_chars __P((WORD_LIST *));
-static char *array_value_internal __P((char *, int, int, int *, arrayind_t *));
-
-/* Standard error message to use when encountering an invalid array subscript */
-const char * const bash_badsub_errmsg = N_("bad array subscript");
-
-/* **************************************************************** */
-/* */
-/* Functions to manipulate array variables and perform assignments */
-/* */
-/* **************************************************************** */
-
-/* Convert a shell variable to an array variable. The original value is
- saved as array[0]. */
-SHELL_VAR *
-convert_var_to_array (var)
- SHELL_VAR *var;
-{
- char *oldval;
- ARRAY *array;
-
- oldval = value_cell (var);
- array = array_create ();
- if (oldval)
- array_insert (array, 0, oldval);
-
- FREE (value_cell (var));
- var_setarray (var, array);
-
- /* these aren't valid anymore */
- var->dynamic_value = (sh_var_value_func_t *)NULL;
- var->assign_func = (sh_var_assign_func_t *)NULL;
-
- INVALIDATE_EXPORTSTR (var);
- if (exported_p (var))
- array_needs_making++;
-
- VSETATTR (var, att_array);
- VUNSETATTR (var, att_invisible);
-
- return var;
-}
-
-/* Convert a shell variable to an array variable. The original value is
- saved as array[0]. */
-SHELL_VAR *
-convert_var_to_assoc (var)
- SHELL_VAR *var;
-{
- char *oldval;
- HASH_TABLE *hash;
-
- oldval = value_cell (var);
- hash = assoc_create (0);
- if (oldval)
- assoc_insert (hash, savestring ("0"), oldval);
-
- FREE (value_cell (var));
- var_setassoc (var, hash);
-
- /* these aren't valid anymore */
- var->dynamic_value = (sh_var_value_func_t *)NULL;
- var->assign_func = (sh_var_assign_func_t *)NULL;
-
- INVALIDATE_EXPORTSTR (var);
- if (exported_p (var))
- array_needs_making++;
-
- VSETATTR (var, att_assoc);
- VUNSETATTR (var, att_invisible);
-
- return var;
-}
-
-static SHELL_VAR *
-bind_array_var_internal (entry, ind, key, value, flags)
- SHELL_VAR *entry;
- arrayind_t ind;
- char *key;
- char *value;
- int flags;
-{
- SHELL_VAR *dentry;
- char *newval;
-
- /* If we're appending, we need the old value of the array reference, so
- fake out make_variable_value with a dummy SHELL_VAR */
- if (flags & ASS_APPEND)
- {
- dentry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
- dentry->name = savestring (entry->name);
- if (assoc_p (entry))
- newval = assoc_reference (assoc_cell (entry), key);
- else
- newval = array_reference (array_cell (entry), ind);
- if (newval)
- dentry->value = savestring (newval);
- else
- {
- dentry->value = (char *)xmalloc (1);
- dentry->value[0] = '\0';
- }
- dentry->exportstr = 0;
- dentry->attributes = entry->attributes & ~(att_array|att_assoc|att_exported);
- /* Leave the rest of the members uninitialized; the code doesn't look
- at them. */
- newval = make_variable_value (dentry, value, flags);
- dispose_variable (dentry);
- }
- else
- newval = make_variable_value (entry, value, flags);
-
- if (entry->assign_func)
- (*entry->assign_func) (entry, newval, ind, key);
- else if (assoc_p (entry))
- assoc_insert (assoc_cell (entry), key, newval);
- else
- array_insert (array_cell (entry), ind, newval);
- FREE (newval);
-
- return (entry);
-}
-
-/* Perform an array assignment name[ind]=value. If NAME already exists and
- is not an array, and IND is 0, perform name=value instead. If NAME exists
- and is not an array, and IND is not 0, convert it into an array with the
- existing value as name[0].
-
- If NAME does not exist, just create an array variable, no matter what
- IND's value may be. */
-SHELL_VAR *
-bind_array_variable (name, ind, value, flags)
- char *name;
- arrayind_t ind;
- char *value;
- int flags;
-{
- SHELL_VAR *entry;
-
- entry = var_lookup (name, shell_variables);
-
- if (entry == (SHELL_VAR *) 0)
- entry = make_new_array_variable (name);
- else if (readonly_p (entry) || noassign_p (entry))
- {
- if (readonly_p (entry))
- err_readonly (name);
- return (entry);
- }
- else if (array_p (entry) == 0)
- entry = convert_var_to_array (entry);
-
- /* ENTRY is an array variable, and ARRAY points to the value. */
- return (bind_array_var_internal (entry, ind, 0, value, flags));
-}
-
-SHELL_VAR *
-bind_array_element (entry, ind, value, flags)
- SHELL_VAR *entry;
- arrayind_t ind;
- char *value;
- int flags;
-{
- return (bind_array_var_internal (entry, ind, 0, value, flags));
-}
-
-SHELL_VAR *
-bind_assoc_variable (entry, name, key, value, flags)
- SHELL_VAR *entry;
- char *name;
- char *key;
- char *value;
- int flags;
-{
- SHELL_VAR *dentry;
- char *newval;
-
- if (readonly_p (entry) || noassign_p (entry))
- {
- if (readonly_p (entry))
- err_readonly (name);
- return (entry);
- }
-
- return (bind_array_var_internal (entry, 0, key, value, flags));
-}
-
-/* Parse NAME, a lhs of an assignment statement of the form v[s], and
- assign VALUE to that array element by calling bind_array_variable(). */
-SHELL_VAR *
-assign_array_element (name, value, flags)
- char *name, *value;
- int flags;
-{
- char *sub, *vname;
- int sublen;
- SHELL_VAR *entry;
-
- vname = array_variable_name (name, &sub, &sublen);
-
- if (vname == 0)
- return ((SHELL_VAR *)NULL);
-
- if ((ALL_ELEMENT_SUB (sub[0]) && sub[1] == ']') || (sublen <= 1))
- {
- free (vname);
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
-
- entry = find_variable (vname);
- entry = assign_array_element_internal (entry, name, vname, sub, sublen, value, flags);
-
- free (vname);
- return entry;
-}
-
-static SHELL_VAR *
-assign_array_element_internal (entry, name, vname, sub, sublen, value, flags)
- SHELL_VAR *entry;
- char *name; /* only used for error messages */
- char *vname;
- char *sub;
- int sublen;
- char *value;
- int flags;
-{
- char *akey;
- arrayind_t ind;
-
- if (entry && assoc_p (entry))
- {
- sub[sublen-1] = '\0';
- akey = expand_assignment_string_to_string (sub, 0); /* [ */
- sub[sublen-1] = ']';
- if (akey == 0 || *akey == 0)
- {
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
- entry = bind_assoc_variable (entry, vname, akey, value, flags);
- }
- else
- {
- ind = array_expand_index (entry, sub, sublen);
- if (ind < 0)
- {
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
- entry = bind_array_variable (vname, ind, value, flags);
- }
-
- return (entry);
-}
-
-/* Find the array variable corresponding to NAME. If there is no variable,
- create a new array variable. If the variable exists but is not an array,
- convert it to an indexed array. If FLAGS&1 is non-zero, an existing
- variable is checked for the readonly or noassign attribute in preparation
- for assignment (e.g., by the `read' builtin). If FLAGS&2 is non-zero, we
- create an associative array. */
-SHELL_VAR *
-find_or_make_array_variable (name, flags)
- char *name;
- int flags;
-{
- SHELL_VAR *var;
-
- var = find_variable (name);
-
- if (var == 0)
- var = (flags & 2) ? make_new_assoc_variable (name) : make_new_array_variable (name);
- else if ((flags & 1) && (readonly_p (var) || noassign_p (var)))
- {
- if (readonly_p (var))
- err_readonly (name);
- return ((SHELL_VAR *)NULL);
- }
- else if ((flags & 2) && array_p (var))
- {
- report_error (_("%s: cannot convert indexed to associative array"), name);
- return ((SHELL_VAR *)NULL);
- }
- else if (array_p (var) == 0 && assoc_p (var) == 0)
- var = convert_var_to_array (var);
-
- return (var);
-}
-
-/* Perform a compound assignment statement for array NAME, where VALUE is
- the text between the parens: NAME=( VALUE ) */
-SHELL_VAR *
-assign_array_from_string (name, value, flags)
- char *name, *value;
- int flags;
-{
- SHELL_VAR *var;
- int vflags;
-
- vflags = 1;
- if (flags & ASS_MKASSOC)
- vflags |= 2;
-
- var = find_or_make_array_variable (name, vflags);
- if (var == 0)
- return ((SHELL_VAR *)NULL);
-
- return (assign_array_var_from_string (var, value, flags));
-}
-
-/* Sequentially assign the indices of indexed array variable VAR from the
- words in LIST. */
-SHELL_VAR *
-assign_array_var_from_word_list (var, list, flags)
- SHELL_VAR *var;
- WORD_LIST *list;
- int flags;
-{
- register arrayind_t i;
- register WORD_LIST *l;
- ARRAY *a;
-
- a = array_cell (var);
- i = (flags & ASS_APPEND) ? array_max_index (a) + 1 : 0;
-
- for (l = list; l; l = l->next, i++)
- if (var->assign_func)
- (*var->assign_func) (var, l->word->word, i, 0);
- else
- array_insert (a, i, l->word->word);
- return var;
-}
-
-WORD_LIST *
-expand_compound_array_assignment (var, value, flags)
- SHELL_VAR *var;
- char *value;
- int flags;
-{
- WORD_LIST *list, *nlist;
- WORD_LIST *hd, *tl, *t, *n;
- char *val;
- int ni;
-
- /* This condition is true when invoked from the declare builtin with a
- command like
- declare -a d='([1]="" [2]="bdef" [5]="hello world" "test")' */
- if (*value == '(') /*)*/
- {
- ni = 1;
- val = extract_array_assignment_list (value, &ni);
- if (val == 0)
- return (WORD_LIST *)NULL;
- }
- else
- val = value;
-
- /* Expand the value string into a list of words, performing all the
- shell expansions including pathname generation and word splitting. */
- /* First we split the string on whitespace, using the shell parser
- (ksh93 seems to do this). */
- list = parse_string_to_word_list (val, 1, "array assign");
-
- /* If we're using [subscript]=value, we need to quote each [ and ] to
- prevent unwanted filename expansion. This doesn't need to be done
- for associative array expansion, since that uses a different expansion
- function (see assign_compound_array_list below). */
- if (list && var && assoc_p (var) == 0)
- quote_array_assignment_chars (list);
-
- /* We want vname=([sub]=value) to be as close as possible to
- vname[sub]=value for associative arrays, so we don't expand the
- subscript before we try to find the end of it, for instance.
- We defer most of the expansions and let the caller
- (assign_compound_array_list) take care of it. */
- nlist = 0;
- for (t = list; t; t = t->next)
- {
- n = t->next;
- t->next = 0;
- /* t == word to expand */
- if (var && assoc_p (var) && (t->word->flags & W_ASSIGNMENT) && t->word->word[0] == '[') /*]*/
- hd = copy_word_list (t); /* defer expansions to caller */
- else
- hd = expand_words_no_vars (t);
- t->next = n;
-
- /* Now we want to append hd to nlist. tl is the running tail of nlist */
- if (nlist == 0)
- nlist = tl = hd;
- else
- tl->next = hd;
- while (tl && tl->next) tl = tl->next;
- }
-
- dispose_words (list);
-
- if (val != value)
- free (val);
-
- return nlist;
-}
-
-/* Callers ensure that VAR is not NULL */
-void
-assign_compound_array_list (var, nlist, flags)
- SHELL_VAR *var;
- WORD_LIST *nlist;
- int flags;
-{
- ARRAY *a;
- HASH_TABLE *h;
- WORD_LIST *list;
- char *w, *val, *nval;
- int len, iflags, free_val;
- arrayind_t ind, last_ind;
- char *akey;
-
- a = (var && array_p (var)) ? array_cell (var) : (ARRAY *)0;
- h = (var && assoc_p (var)) ? assoc_cell (var) : (HASH_TABLE *)0;
-
- akey = (char *)0;
- ind = 0;
-
- /* Now that we are ready to assign values to the array, kill the existing
- value. */
- if ((flags & ASS_APPEND) == 0)
- {
- if (a && array_p (var))
- array_flush (a);
- else if (h && assoc_p (var))
- assoc_flush (h);
- }
-
- last_ind = (a && (flags & ASS_APPEND)) ? array_max_index (a) + 1 : 0;
-
- for (list = nlist; list; list = list->next)
- {
- iflags = flags;
- w = list->word->word;
-
- /* We have a word of the form [ind]=value */
- if ((list->word->flags & W_ASSIGNMENT) && w[0] == '[')
- {
- /* Don't have to handle embedded quotes specially any more, since
- associative array subscripts have not been expanded yet (see
- above). */
- len = skipsubscript (w, 0, 0);
-
- /* XXX - changes for `+=' */
- if (w[len] != ']' || (w[len+1] != '=' && (w[len+1] != '+' || w[len+2] != '=')))
- {
- if (assoc_p (var))
- {
- err_badarraysub (w);
- continue;
- }
- nval = make_variable_value (var, w, flags);
- if (var->assign_func)
- (*var->assign_func) (var, nval, last_ind, 0);
- else
- array_insert (a, last_ind, nval);
- FREE (nval);
- last_ind++;
- continue;
- }
-
- if (len == 1)
- {
- err_badarraysub (w);
- continue;
- }
-
- if (ALL_ELEMENT_SUB (w[1]) && len == 2)
- {
- if (assoc_p (var))
- report_error (_("%s: invalid associative array key"), w);
- else
- report_error (_("%s: cannot assign to non-numeric index"), w);
- continue;
- }
-
- if (array_p (var))
- {
- ind = array_expand_index (var, w + 1, len);
- if (ind < 0)
- {
- err_badarraysub (w);
- continue;
- }
-
- last_ind = ind;
- }
- else if (assoc_p (var))
- {
- /* This is not performed above, see expand_compound_array_assignment */
- w[len] = '\0'; /*[*/
- akey = expand_assignment_string_to_string (w+1, 0);
- w[len] = ']';
- /* And we need to expand the value also, see below */
- if (akey == 0 || *akey == 0)
- {
- err_badarraysub (w);
- continue;
- }
- }
-
- /* XXX - changes for `+=' -- just accept the syntax. ksh93 doesn't do this */
- if (w[len + 1] == '+' && w[len + 2] == '=')
- {
- iflags |= ASS_APPEND;
- val = w + len + 3;
- }
- else
- val = w + len + 2;
-
- }
- else if (assoc_p (var))
- {
- report_error (_("%s: %s: must use subscript when assigning associative array"), var->name, w);
- continue;
- }
- else /* No [ind]=value, just a stray `=' */
- {
- ind = last_ind;
- val = w;
- }
-
- free_val = 0;
- /* See above; we need to expand the value here */
- if (assoc_p (var))
- {
- val = expand_assignment_string_to_string (val, 0);
- free_val = 1;
- }
-
- if (integer_p (var))
- this_command_name = (char *)NULL; /* no command name for errors */
- bind_array_var_internal (var, ind, akey, val, iflags);
- last_ind++;
-
- if (free_val)
- free (val);
- }
-}
-
-/* Perform a compound array assignment: VAR->name=( VALUE ). The
- VALUE has already had the parentheses stripped. */
-SHELL_VAR *
-assign_array_var_from_string (var, value, flags)
- SHELL_VAR *var;
- char *value;
- int flags;
-{
- WORD_LIST *nlist;
-
- if (value == 0)
- return var;
-
- nlist = expand_compound_array_assignment (var, value, flags);
- assign_compound_array_list (var, nlist, flags);
-
- if (nlist)
- dispose_words (nlist);
- return (var);
-}
-
-/* Quote globbing chars and characters in $IFS before the `=' in an assignment
- statement (usually a compound array assignment) to protect them from
- unwanted filename expansion or word splitting. */
-static char *
-quote_assign (string)
- const char *string;
-{
- size_t slen;
- int saw_eq;
- char *temp, *t, *subs;
- const char *s, *send;
- int ss, se;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- send = string + slen;
-
- t = temp = (char *)xmalloc (slen * 2 + 1);
- saw_eq = 0;
- for (s = string; *s; )
- {
- if (*s == '=')
- saw_eq = 1;
- if (saw_eq == 0 && *s == '[') /* looks like a subscript */
- {
- ss = s - string;
- se = skipsubscript (string, ss, 0);
- subs = substring (s, ss, se);
- *t++ = '\\';
- strcpy (t, subs);
- t += se - ss;
- *t++ = '\\';
- *t++ = ']';
- s += se + 1;
- free (subs);
- continue;
- }
- if (saw_eq == 0 && (glob_char_p (s) || isifs (*s)))
- *t++ = '\\';
-
- COPY_CHAR_P (t, s, send);
- }
- *t = '\0';
- return temp;
-}
-
-/* For each word in a compound array assignment, if the word looks like
- [ind]=value, quote globbing chars and characters in $IFS before the `='. */
-static void
-quote_array_assignment_chars (list)
- WORD_LIST *list;
-{
- char *nword;
- WORD_LIST *l;
-
- for (l = list; l; l = l->next)
- {
- if (l->word == 0 || l->word->word == 0 || l->word->word[0] == '\0')
- continue; /* should not happen, but just in case... */
- /* Don't bother if it doesn't look like [ind]=value */
- if (l->word->word[0] != '[' || mbschr (l->word->word, '=') == 0) /* ] */
- continue;
- nword = quote_assign (l->word->word);
- free (l->word->word);
- l->word->word = nword;
- }
-}
-
-/* skipsubscript moved to subst.c to use private functions. 2009/02/24. */
-
-/* This function is called with SUB pointing to just after the beginning
- `[' of an array subscript and removes the array element to which SUB
- expands from array VAR. A subscript of `*' or `@' unsets the array. */
-int
-unbind_array_element (var, sub)
- SHELL_VAR *var;
- char *sub;
-{
- int len;
- arrayind_t ind;
- char *akey;
- ARRAY_ELEMENT *ae;
-
- len = skipsubscript (sub, 0, 0);
- if (sub[len] != ']' || len == 0)
- {
- builtin_error ("%s[%s: %s", var->name, sub, _(bash_badsub_errmsg));
- return -1;
- }
- sub[len] = '\0';
-
- if (ALL_ELEMENT_SUB (sub[0]) && sub[1] == 0)
- {
- unbind_variable (var->name);
- return (0);
- }
-
- if (assoc_p (var))
- {
- akey = expand_assignment_string_to_string (sub, 0); /* [ */
- if (akey == 0 || *akey == 0)
- {
- builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
- return -1;
- }
- assoc_remove (assoc_cell (var), akey);
- free (akey);
- }
- else
- {
- ind = array_expand_index (var, sub, len+1);
- if (ind < 0)
- {
- builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
- return -1;
- }
- ae = array_remove (array_cell (var), ind);
- if (ae)
- array_dispose_element (ae);
- }
-
- return 0;
-}
-
-/* Format and output an array assignment in compound form VAR=(VALUES),
- suitable for re-use as input. */
-void
-print_array_assignment (var, quoted)
- SHELL_VAR *var;
- int quoted;
-{
- char *vstr;
-
- vstr = array_to_assign (array_cell (var), quoted);
-
- if (vstr == 0)
- printf ("%s=%s\n", var->name, quoted ? "'()'" : "()");
- else
- {
- printf ("%s=%s\n", var->name, vstr);
- free (vstr);
- }
-}
-
-/* Format and output an associative array assignment in compound form
- VAR=(VALUES), suitable for re-use as input. */
-void
-print_assoc_assignment (var, quoted)
- SHELL_VAR *var;
- int quoted;
-{
- char *vstr;
-
- vstr = assoc_to_assign (assoc_cell (var), quoted);
-
- if (vstr == 0)
- printf ("%s=%s\n", var->name, quoted ? "'()'" : "()");
- else
- {
- printf ("%s=%s\n", var->name, vstr);
- free (vstr);
- }
-}
-
-/***********************************************************************/
-/* */
-/* Utility functions to manage arrays and their contents for expansion */
-/* */
-/***********************************************************************/
-
-/* Return 1 if NAME is a properly-formed array reference v[sub]. */
-int
-valid_array_reference (name)
- char *name;
-{
- char *t;
- int r, len;
-
- t = mbschr (name, '['); /* ] */
- if (t)
- {
- *t = '\0';
- r = legal_identifier (name);
- *t = '[';
- if (r == 0)
- return 0;
- /* Check for a properly-terminated non-blank subscript. */
- len = skipsubscript (t, 0, 0);
- if (t[len] != ']' || len == 1)
- return 0;
- for (r = 1; r < len; r++)
- if (whitespace (t[r]) == 0)
- return 1;
- return 0;
- }
- return 0;
-}
-
-/* Expand the array index beginning at S and extending LEN characters. */
-arrayind_t
-array_expand_index (var, s, len)
- SHELL_VAR *var;
- char *s;
- int len;
-{
- char *exp, *t;
- int expok;
- arrayind_t val;
-
- exp = (char *)xmalloc (len);
- strncpy (exp, s, len - 1);
- exp[len - 1] = '\0';
- t = expand_arith_string (exp, 0);
- this_command_name = (char *)NULL;
- val = evalexp (t, &expok);
- free (t);
- free (exp);
- if (expok == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
-
- top_level_cleanup ();
- jump_to_top_level (DISCARD);
- }
- return val;
-}
-
-/* Return the name of the variable specified by S without any subscript.
- If SUBP is non-null, return a pointer to the start of the subscript
- in *SUBP. If LENP is non-null, the length of the subscript is returned
- in *LENP. This returns newly-allocated memory. */
-char *
-array_variable_name (s, subp, lenp)
- char *s, **subp;
- int *lenp;
-{
- char *t, *ret;
- int ind, ni;
-
- t = mbschr (s, '[');
- if (t == 0)
- {
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = 0;
- return ((char *)NULL);
- }
- ind = t - s;
- ni = skipsubscript (s, ind, 0);
- if (ni <= ind + 1 || s[ni] != ']')
- {
- err_badarraysub (s);
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = 0;
- return ((char *)NULL);
- }
-
- *t = '\0';
- ret = savestring (s);
- *t++ = '['; /* ] */
-
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = ni - ind;
-
- return ret;
-}
-
-/* Return the variable specified by S without any subscript. If SUBP is
- non-null, return a pointer to the start of the subscript in *SUBP.
- If LENP is non-null, the length of the subscript is returned in *LENP. */
-SHELL_VAR *
-array_variable_part (s, subp, lenp)
- char *s, **subp;
- int *lenp;
-{
- char *t;
- SHELL_VAR *var;
-
- t = array_variable_name (s, subp, lenp);
- if (t == 0)
- return ((SHELL_VAR *)NULL);
- var = find_variable (t);
-
- free (t);
- return (var == 0 || invisible_p (var)) ? (SHELL_VAR *)0 : var;
-}
-
-#define INDEX_ERROR() \
- do \
- { \
- if (var) \
- err_badarraysub (var->name); \
- else \
- { \
- t[-1] = '\0'; \
- err_badarraysub (s); \
- t[-1] = '['; /* ] */\
- } \
- return ((char *)NULL); \
- } \
- while (0)
-
-/* Return a string containing the elements in the array and subscript
- described by S. If the subscript is * or @, obeys quoting rules akin
- to the expansion of $* and $@ including double quoting. If RTYPE
- is non-null it gets 1 if the array reference is name[*], 2 if the
- reference is name[@], and 0 otherwise. */
-static char *
-array_value_internal (s, quoted, flags, rtype, indp)
- char *s;
- int quoted, flags, *rtype;
- arrayind_t *indp;
-{
- int len;
- arrayind_t ind;
- char *akey;
- char *retval, *t, *temp;
- WORD_LIST *l;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* Expand the index, even if the variable doesn't exist, in case side
- effects are needed, like ${w[i++]} where w is unset. */
-#if 0
- if (var == 0)
- return (char *)NULL;
-#endif
-
- if (len == 0)
- return ((char *)NULL); /* error message already printed */
-
- /* [ */
- if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']')
- {
- if (rtype)
- *rtype = (t[0] == '*') ? 1 : 2;
- if ((flags & AV_ALLOWALL) == 0)
- {
- err_badarraysub (s);
- return ((char *)NULL);
- }
- else if (var == 0 || value_cell (var) == 0) /* XXX - check for invisible_p(var) ? */
- return ((char *)NULL);
- else if (array_p (var) == 0 && assoc_p (var) == 0)
- l = add_string_to_list (value_cell (var), (WORD_LIST *)NULL);
- else if (assoc_p (var))
- {
- l = assoc_to_word_list (assoc_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *)NULL);
- }
- else
- {
- l = array_to_word_list (array_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *) NULL);
- }
-
- if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- {
- temp = string_list_dollar_star (l);
- retval = quote_string (temp);
- free (temp);
- }
- else /* ${name[@]} or unquoted ${name[*]} */
- retval = string_list_dollar_at (l, quoted);
-
- dispose_words (l);
- }
- else
- {
- if (rtype)
- *rtype = 0;
- if (var == 0 || array_p (var) || assoc_p (var) == 0)
- {
- if ((flags & AV_USEIND) == 0 || indp == 0)
- {
- ind = array_expand_index (var, t, len);
- if (ind < 0)
- {
- /* negative subscripts to indexed arrays count back from end */
- if (var && array_p (var))
- ind = array_max_index (array_cell (var)) + 1 + ind;
- if (ind < 0)
- INDEX_ERROR();
- }
- if (indp)
- *indp = ind;
- }
- else if (indp)
- ind = *indp;
- }
- else if (assoc_p (var))
- {
- t[len - 1] = '\0';
- akey = expand_assignment_string_to_string (t, 0); /* [ */
- t[len - 1] = ']';
- if (akey == 0 || *akey == 0)
- INDEX_ERROR();
- }
-
- if (var == 0 || value_cell (var) == 0) /* XXX - check invisible_p(var) ? */
- return ((char *)NULL);
- if (array_p (var) == 0 && assoc_p (var) == 0)
- return (ind == 0 ? value_cell (var) : (char *)NULL);
- else if (assoc_p (var))
- {
- retval = assoc_reference (assoc_cell (var), akey);
- free (akey);
- }
- else
- retval = array_reference (array_cell (var), ind);
- }
-
- return retval;
-}
-
-/* Return a string containing the elements described by the array and
- subscript contained in S, obeying quoting for subscripts * and @. */
-char *
-array_value (s, quoted, flags, rtype, indp)
- char *s;
- int quoted, flags, *rtype;
- arrayind_t *indp;
-{
- return (array_value_internal (s, quoted, flags|AV_ALLOWALL, rtype, indp));
-}
-
-/* Return the value of the array indexing expression S as a single string.
- If (FLAGS & AV_ALLOWALL) is 0, do not allow `@' and `*' subscripts. This
- is used by other parts of the shell such as the arithmetic expression
- evaluator in expr.c. */
-char *
-get_array_value (s, flags, rtype, indp)
- char *s;
- int flags, *rtype;
- arrayind_t *indp;
-{
- return (array_value_internal (s, 0, flags, rtype, indp));
-}
-
-char *
-array_keys (s, quoted)
- char *s;
- int quoted;
-{
- int len;
- char *retval, *t, *temp;
- WORD_LIST *l;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* [ */
- if (var == 0 || ALL_ELEMENT_SUB (t[0]) == 0 || t[1] != ']')
- return (char *)NULL;
-
- if (var_isset (var) == 0 || invisible_p (var))
- return (char *)NULL;
-
- if (array_p (var) == 0 && assoc_p (var) == 0)
- l = add_string_to_list ("0", (WORD_LIST *)NULL);
- else if (assoc_p (var))
- l = assoc_keys_to_word_list (assoc_cell (var));
- else
- l = array_keys_to_word_list (array_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *) NULL);
-
- if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- {
- temp = string_list_dollar_star (l);
- retval = quote_string (temp);
- free (temp);
- }
- else /* ${!name[@]} or unquoted ${!name[*]} */
- retval = string_list_dollar_at (l, quoted);
-
- dispose_words (l);
- return retval;
-}
-#endif /* ARRAY_VARS */
+++ /dev/null
-/* arrayfunc.c -- High-level array functions used by other parts of the shell. */
-
-/* Copyright (C) 2001-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#if defined (ARRAY_VARS)
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-#include <stdio.h>
-
-#include "bashintl.h"
-
-#include "shell.h"
-#include "pathexp.h"
-
-#include "shmbutil.h"
-
-#include "builtins/common.h"
-
-extern char *this_command_name;
-extern int last_command_exit_value;
-extern int array_needs_making;
-
-static SHELL_VAR *bind_array_var_internal __P((SHELL_VAR *, arrayind_t, char *, char *, int));
-static SHELL_VAR *assign_array_element_internal __P((SHELL_VAR *, char *, char *, char *, int, char *, int));
-
-static char *quote_assign __P((const char *));
-static void quote_array_assignment_chars __P((WORD_LIST *));
-static char *array_value_internal __P((char *, int, int, int *, arrayind_t *));
-
-/* Standard error message to use when encountering an invalid array subscript */
-const char * const bash_badsub_errmsg = N_("bad array subscript");
-
-/* **************************************************************** */
-/* */
-/* Functions to manipulate array variables and perform assignments */
-/* */
-/* **************************************************************** */
-
-/* Convert a shell variable to an array variable. The original value is
- saved as array[0]. */
-SHELL_VAR *
-convert_var_to_array (var)
- SHELL_VAR *var;
-{
- char *oldval;
- ARRAY *array;
-
- oldval = value_cell (var);
- array = array_create ();
- if (oldval)
- array_insert (array, 0, oldval);
-
- FREE (value_cell (var));
- var_setarray (var, array);
-
- /* these aren't valid anymore */
- var->dynamic_value = (sh_var_value_func_t *)NULL;
- var->assign_func = (sh_var_assign_func_t *)NULL;
-
- INVALIDATE_EXPORTSTR (var);
- if (exported_p (var))
- array_needs_making++;
-
- VSETATTR (var, att_array);
- VUNSETATTR (var, att_invisible);
-
- return var;
-}
-
-/* Convert a shell variable to an array variable. The original value is
- saved as array[0]. */
-SHELL_VAR *
-convert_var_to_assoc (var)
- SHELL_VAR *var;
-{
- char *oldval;
- HASH_TABLE *hash;
-
- oldval = value_cell (var);
- hash = assoc_create (0);
- if (oldval)
- assoc_insert (hash, savestring ("0"), oldval);
-
- FREE (value_cell (var));
- var_setassoc (var, hash);
-
- /* these aren't valid anymore */
- var->dynamic_value = (sh_var_value_func_t *)NULL;
- var->assign_func = (sh_var_assign_func_t *)NULL;
-
- INVALIDATE_EXPORTSTR (var);
- if (exported_p (var))
- array_needs_making++;
-
- VSETATTR (var, att_assoc);
- VUNSETATTR (var, att_invisible);
-
- return var;
-}
-
-static SHELL_VAR *
-bind_array_var_internal (entry, ind, key, value, flags)
- SHELL_VAR *entry;
- arrayind_t ind;
- char *key;
- char *value;
- int flags;
-{
- SHELL_VAR *dentry;
- char *newval;
-
- /* If we're appending, we need the old value of the array reference, so
- fake out make_variable_value with a dummy SHELL_VAR */
- if (flags & ASS_APPEND)
- {
- dentry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
- dentry->name = savestring (entry->name);
- if (assoc_p (entry))
- newval = assoc_reference (assoc_cell (entry), key);
- else
- newval = array_reference (array_cell (entry), ind);
- if (newval)
- dentry->value = savestring (newval);
- else
- {
- dentry->value = (char *)xmalloc (1);
- dentry->value[0] = '\0';
- }
- dentry->exportstr = 0;
- dentry->attributes = entry->attributes & ~(att_array|att_assoc|att_exported);
- /* Leave the rest of the members uninitialized; the code doesn't look
- at them. */
- newval = make_variable_value (dentry, value, flags);
- dispose_variable (dentry);
- }
- else
- newval = make_variable_value (entry, value, flags);
-
- if (entry->assign_func)
- (*entry->assign_func) (entry, newval, ind, key);
- else if (assoc_p (entry))
- assoc_insert (assoc_cell (entry), key, newval);
- else
- array_insert (array_cell (entry), ind, newval);
- FREE (newval);
-
- return (entry);
-}
-
-/* Perform an array assignment name[ind]=value. If NAME already exists and
- is not an array, and IND is 0, perform name=value instead. If NAME exists
- and is not an array, and IND is not 0, convert it into an array with the
- existing value as name[0].
-
- If NAME does not exist, just create an array variable, no matter what
- IND's value may be. */
-SHELL_VAR *
-bind_array_variable (name, ind, value, flags)
- char *name;
- arrayind_t ind;
- char *value;
- int flags;
-{
- SHELL_VAR *entry;
-
- entry = var_lookup (name, shell_variables);
-
- if (entry == (SHELL_VAR *) 0)
- entry = make_new_array_variable (name);
- else if (readonly_p (entry) || noassign_p (entry))
- {
- if (readonly_p (entry))
- err_readonly (name);
- return (entry);
- }
- else if (array_p (entry) == 0)
- entry = convert_var_to_array (entry);
-
- /* ENTRY is an array variable, and ARRAY points to the value. */
- return (bind_array_var_internal (entry, ind, 0, value, flags));
-}
-
-SHELL_VAR *
-bind_array_element (entry, ind, value, flags)
- SHELL_VAR *entry;
- arrayind_t ind;
- char *value;
- int flags;
-{
- return (bind_array_var_internal (entry, ind, 0, value, flags));
-}
-
-SHELL_VAR *
-bind_assoc_variable (entry, name, key, value, flags)
- SHELL_VAR *entry;
- char *name;
- char *key;
- char *value;
- int flags;
-{
- SHELL_VAR *dentry;
- char *newval;
-
- if (readonly_p (entry) || noassign_p (entry))
- {
- if (readonly_p (entry))
- err_readonly (name);
- return (entry);
- }
-
- return (bind_array_var_internal (entry, 0, key, value, flags));
-}
-
-/* Parse NAME, a lhs of an assignment statement of the form v[s], and
- assign VALUE to that array element by calling bind_array_variable(). */
-SHELL_VAR *
-assign_array_element (name, value, flags)
- char *name, *value;
- int flags;
-{
- char *sub, *vname;
- int sublen;
- SHELL_VAR *entry;
-
- vname = array_variable_name (name, &sub, &sublen);
-
- if (vname == 0)
- return ((SHELL_VAR *)NULL);
-
- if ((ALL_ELEMENT_SUB (sub[0]) && sub[1] == ']') || (sublen <= 1))
- {
- free (vname);
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
-
- entry = find_variable (vname);
- entry = assign_array_element_internal (entry, name, vname, sub, sublen, value, flags);
-
- free (vname);
- return entry;
-}
-
-static SHELL_VAR *
-assign_array_element_internal (entry, name, vname, sub, sublen, value, flags)
- SHELL_VAR *entry;
- char *name; /* only used for error messages */
- char *vname;
- char *sub;
- int sublen;
- char *value;
- int flags;
-{
- char *akey;
- arrayind_t ind;
-
- if (entry && assoc_p (entry))
- {
- sub[sublen-1] = '\0';
- akey = expand_assignment_string_to_string (sub, 0); /* [ */
- sub[sublen-1] = ']';
- if (akey == 0 || *akey == 0)
- {
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
- entry = bind_assoc_variable (entry, vname, akey, value, flags);
- }
- else
- {
- ind = array_expand_index (entry, sub, sublen);
- if (ind < 0)
- {
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
- entry = bind_array_variable (vname, ind, value, flags);
- }
-
- return (entry);
-}
-
-/* Find the array variable corresponding to NAME. If there is no variable,
- create a new array variable. If the variable exists but is not an array,
- convert it to an indexed array. If FLAGS&1 is non-zero, an existing
- variable is checked for the readonly or noassign attribute in preparation
- for assignment (e.g., by the `read' builtin). If FLAGS&2 is non-zero, we
- create an associative array. */
-SHELL_VAR *
-find_or_make_array_variable (name, flags)
- char *name;
- int flags;
-{
- SHELL_VAR *var;
-
- var = find_variable (name);
-
- if (var == 0)
- var = (flags & 2) ? make_new_assoc_variable (name) : make_new_array_variable (name);
- else if ((flags & 1) && (readonly_p (var) || noassign_p (var)))
- {
- if (readonly_p (var))
- err_readonly (name);
- return ((SHELL_VAR *)NULL);
- }
- else if ((flags & 2) && array_p (var))
- {
- report_error (_("%s: cannot convert indexed to associative array"), name);
- return ((SHELL_VAR *)NULL);
- }
- else if (array_p (var) == 0 && assoc_p (var) == 0)
- var = convert_var_to_array (var);
-
- return (var);
-}
-
-/* Perform a compound assignment statement for array NAME, where VALUE is
- the text between the parens: NAME=( VALUE ) */
-SHELL_VAR *
-assign_array_from_string (name, value, flags)
- char *name, *value;
- int flags;
-{
- SHELL_VAR *var;
- int vflags;
-
- vflags = 1;
- if (flags & ASS_MKASSOC)
- vflags |= 2;
-
- var = find_or_make_array_variable (name, vflags);
- if (var == 0)
- return ((SHELL_VAR *)NULL);
-
- return (assign_array_var_from_string (var, value, flags));
-}
-
-/* Sequentially assign the indices of indexed array variable VAR from the
- words in LIST. */
-SHELL_VAR *
-assign_array_var_from_word_list (var, list, flags)
- SHELL_VAR *var;
- WORD_LIST *list;
- int flags;
-{
- register arrayind_t i;
- register WORD_LIST *l;
- ARRAY *a;
-
- a = array_cell (var);
- i = (flags & ASS_APPEND) ? array_max_index (a) + 1 : 0;
-
- for (l = list; l; l = l->next, i++)
- if (var->assign_func)
- (*var->assign_func) (var, l->word->word, i, 0);
- else
- array_insert (a, i, l->word->word);
- return var;
-}
-
-WORD_LIST *
-expand_compound_array_assignment (var, value, flags)
- SHELL_VAR *var;
- char *value;
- int flags;
-{
- WORD_LIST *list, *nlist;
- WORD_LIST *hd, *tl, *t, *n;
- char *val;
- int ni;
-
- /* This condition is true when invoked from the declare builtin with a
- command like
- declare -a d='([1]="" [2]="bdef" [5]="hello world" "test")' */
- if (*value == '(') /*)*/
- {
- ni = 1;
- val = extract_array_assignment_list (value, &ni);
- if (val == 0)
- return (WORD_LIST *)NULL;
- }
- else
- val = value;
-
- /* Expand the value string into a list of words, performing all the
- shell expansions including pathname generation and word splitting. */
- /* First we split the string on whitespace, using the shell parser
- (ksh93 seems to do this). */
- list = parse_string_to_word_list (val, 1, "array assign");
-
- if (var && assoc_p (var))
- {
- if (val != value)
- free (val);
- return list;
- }
-
- /* If we're using [subscript]=value, we need to quote each [ and ] to
- prevent unwanted filename expansion. This doesn't need to be done
- for associative array expansion, since that uses a different expansion
- function (see assign_compound_array_list below). */
- if (list)
- quote_array_assignment_chars (list);
-
- /* Now that we've split it, perform the shell expansions on each
- word in the list. */
- nlist = list ? expand_words_no_vars (list) : (WORD_LIST *)NULL;
-
- dispose_words (list);
-
- if (val != value)
- free (val);
-
- return nlist;
-}
-
-/* Callers ensure that VAR is not NULL */
-void
-assign_compound_array_list (var, nlist, flags)
- SHELL_VAR *var;
- WORD_LIST *nlist;
- int flags;
-{
- ARRAY *a;
- HASH_TABLE *h;
- WORD_LIST *list;
- char *w, *val, *nval;
- int len, iflags, free_val;
- arrayind_t ind, last_ind;
- char *akey;
-
- a = (var && array_p (var)) ? array_cell (var) : (ARRAY *)0;
- h = (var && assoc_p (var)) ? assoc_cell (var) : (HASH_TABLE *)0;
-
- akey = (char *)0;
- ind = 0;
-
- /* Now that we are ready to assign values to the array, kill the existing
- value. */
- if ((flags & ASS_APPEND) == 0)
- {
- if (a && array_p (var))
- array_flush (a);
- else if (h && assoc_p (var))
- assoc_flush (h);
- }
-
- last_ind = (a && (flags & ASS_APPEND)) ? array_max_index (a) + 1 : 0;
-
- for (list = nlist; list; list = list->next)
- {
- iflags = flags;
- w = list->word->word;
-
- /* We have a word of the form [ind]=value */
- if ((list->word->flags & W_ASSIGNMENT) && w[0] == '[')
- {
- /* Don't have to handle embedded quotes specially any more, since
- associative array subscripts have not been expanded yet (see
- above). */
- len = skipsubscript (w, 0, 0);
-
- /* XXX - changes for `+=' */
- if (w[len] != ']' || (w[len+1] != '=' && (w[len+1] != '+' || w[len+2] != '=')))
- {
- if (assoc_p (var))
- {
- err_badarraysub (w);
- continue;
- }
- nval = make_variable_value (var, w, flags);
- if (var->assign_func)
- (*var->assign_func) (var, nval, last_ind, 0);
- else
- array_insert (a, last_ind, nval);
- FREE (nval);
- last_ind++;
- continue;
- }
-
- if (len == 1)
- {
- err_badarraysub (w);
- continue;
- }
-
- if (ALL_ELEMENT_SUB (w[1]) && len == 2)
- {
- if (assoc_p (var))
- report_error (_("%s: invalid associative array key"), w);
- else
- report_error (_("%s: cannot assign to non-numeric index"), w);
- continue;
- }
-
- if (array_p (var))
- {
- ind = array_expand_index (var, w + 1, len);
- if (ind < 0)
- {
- err_badarraysub (w);
- continue;
- }
-
- last_ind = ind;
- }
- else if (assoc_p (var))
- {
- /* This is not performed above, see expand_compound_array_assignment */
- w[len] = '\0'; /*[*/
- akey = expand_assignment_string_to_string (w+1, 0);
- w[len] = ']';
- /* And we need to expand the value also, see below */
- if (akey == 0 || *akey == 0)
- {
- err_badarraysub (w);
- continue;
- }
- }
-
- /* XXX - changes for `+=' -- just accept the syntax. ksh93 doesn't do this */
- if (w[len + 1] == '+' && w[len + 2] == '=')
- {
- iflags |= ASS_APPEND;
- val = w + len + 3;
- }
- else
- val = w + len + 2;
- }
- else if (assoc_p (var))
- {
- report_error (_("%s: %s: must use subscript when assigning associative array"), var->name, w);
- continue;
- }
- else /* No [ind]=value, just a stray `=' */
- {
- ind = last_ind;
- val = w;
- }
-
- free_val = 0;
- /* See above; we need to expand the value here */
- if (assoc_p (var))
- {
- val = expand_assignment_string_to_string (val, 0);
- free_val = 1;
- }
-
- if (integer_p (var))
- this_command_name = (char *)NULL; /* no command name for errors */
- bind_array_var_internal (var, ind, akey, val, iflags);
- last_ind++;
-
- if (free_val)
- free (val);
- }
-}
-
-/* Perform a compound array assignment: VAR->name=( VALUE ). The
- VALUE has already had the parentheses stripped. */
-SHELL_VAR *
-assign_array_var_from_string (var, value, flags)
- SHELL_VAR *var;
- char *value;
- int flags;
-{
- WORD_LIST *nlist;
-
- if (value == 0)
- return var;
-
- nlist = expand_compound_array_assignment (var, value, flags);
- assign_compound_array_list (var, nlist, flags);
-
- if (nlist)
- dispose_words (nlist);
- return (var);
-}
-
-/* Quote globbing chars and characters in $IFS before the `=' in an assignment
- statement (usually a compound array assignment) to protect them from
- unwanted filename expansion or word splitting. */
-static char *
-quote_assign (string)
- const char *string;
-{
- size_t slen;
- int saw_eq;
- char *temp, *t, *subs;
- const char *s, *send;
- int ss, se;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- send = string + slen;
-
- t = temp = (char *)xmalloc (slen * 2 + 1);
- saw_eq = 0;
- for (s = string; *s; )
- {
- if (*s == '=')
- saw_eq = 1;
- if (saw_eq == 0 && *s == '[') /* looks like a subscript */
- {
- ss = s - string;
- se = skipsubscript (string, ss, 0);
- subs = substring (s, ss, se);
- *t++ = '\\';
- strcpy (t, subs);
- t += se - ss;
- *t++ = '\\';
- *t++ = ']';
- s += se + 1;
- free (subs);
- continue;
- }
- if (saw_eq == 0 && (glob_char_p (s) || isifs (*s)))
- *t++ = '\\';
-
- COPY_CHAR_P (t, s, send);
- }
- *t = '\0';
- return temp;
-}
-
-/* For each word in a compound array assignment, if the word looks like
- [ind]=value, quote globbing chars and characters in $IFS before the `='. */
-static void
-quote_array_assignment_chars (list)
- WORD_LIST *list;
-{
- char *nword;
- WORD_LIST *l;
-
- for (l = list; l; l = l->next)
- {
- if (l->word == 0 || l->word->word == 0 || l->word->word[0] == '\0')
- continue; /* should not happen, but just in case... */
- /* Don't bother if it doesn't look like [ind]=value */
- if (l->word->word[0] != '[' || mbschr (l->word->word, '=') == 0) /* ] */
- continue;
- nword = quote_assign (l->word->word);
- free (l->word->word);
- l->word->word = nword;
- }
-}
-
-/* skipsubscript moved to subst.c to use private functions. 2009/02/24. */
-
-/* This function is called with SUB pointing to just after the beginning
- `[' of an array subscript and removes the array element to which SUB
- expands from array VAR. A subscript of `*' or `@' unsets the array. */
-int
-unbind_array_element (var, sub)
- SHELL_VAR *var;
- char *sub;
-{
- int len;
- arrayind_t ind;
- char *akey;
- ARRAY_ELEMENT *ae;
-
- len = skipsubscript (sub, 0, 0);
- if (sub[len] != ']' || len == 0)
- {
- builtin_error ("%s[%s: %s", var->name, sub, _(bash_badsub_errmsg));
- return -1;
- }
- sub[len] = '\0';
-
- if (ALL_ELEMENT_SUB (sub[0]) && sub[1] == 0)
- {
- unbind_variable (var->name);
- return (0);
- }
-
- if (assoc_p (var))
- {
- akey = expand_assignment_string_to_string (sub, 0); /* [ */
- if (akey == 0 || *akey == 0)
- {
- builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
- return -1;
- }
- assoc_remove (assoc_cell (var), akey);
- free (akey);
- }
- else
- {
- ind = array_expand_index (var, sub, len+1);
- if (ind < 0)
- {
- builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
- return -1;
- }
- ae = array_remove (array_cell (var), ind);
- if (ae)
- array_dispose_element (ae);
- }
-
- return 0;
-}
-
-/* Format and output an array assignment in compound form VAR=(VALUES),
- suitable for re-use as input. */
-void
-print_array_assignment (var, quoted)
- SHELL_VAR *var;
- int quoted;
-{
- char *vstr;
-
- vstr = array_to_assign (array_cell (var), quoted);
-
- if (vstr == 0)
- printf ("%s=%s\n", var->name, quoted ? "'()'" : "()");
- else
- {
- printf ("%s=%s\n", var->name, vstr);
- free (vstr);
- }
-}
-
-/* Format and output an associative array assignment in compound form
- VAR=(VALUES), suitable for re-use as input. */
-void
-print_assoc_assignment (var, quoted)
- SHELL_VAR *var;
- int quoted;
-{
- char *vstr;
-
- vstr = assoc_to_assign (assoc_cell (var), quoted);
-
- if (vstr == 0)
- printf ("%s=%s\n", var->name, quoted ? "'()'" : "()");
- else
- {
- printf ("%s=%s\n", var->name, vstr);
- free (vstr);
- }
-}
-
-/***********************************************************************/
-/* */
-/* Utility functions to manage arrays and their contents for expansion */
-/* */
-/***********************************************************************/
-
-/* Return 1 if NAME is a properly-formed array reference v[sub]. */
-int
-valid_array_reference (name)
- char *name;
-{
- char *t;
- int r, len;
-
- t = mbschr (name, '['); /* ] */
- if (t)
- {
- *t = '\0';
- r = legal_identifier (name);
- *t = '[';
- if (r == 0)
- return 0;
- /* Check for a properly-terminated non-blank subscript. */
- len = skipsubscript (t, 0, 0);
- if (t[len] != ']' || len == 1)
- return 0;
- for (r = 1; r < len; r++)
- if (whitespace (t[r]) == 0)
- return 1;
- return 0;
- }
- return 0;
-}
-
-/* Expand the array index beginning at S and extending LEN characters. */
-arrayind_t
-array_expand_index (var, s, len)
- SHELL_VAR *var;
- char *s;
- int len;
-{
- char *exp, *t;
- int expok;
- arrayind_t val;
-
- exp = (char *)xmalloc (len);
- strncpy (exp, s, len - 1);
- exp[len - 1] = '\0';
- t = expand_arith_string (exp, 0);
- this_command_name = (char *)NULL;
- val = evalexp (t, &expok);
- free (t);
- free (exp);
- if (expok == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
-
- top_level_cleanup ();
- jump_to_top_level (DISCARD);
- }
- return val;
-}
-
-/* Return the name of the variable specified by S without any subscript.
- If SUBP is non-null, return a pointer to the start of the subscript
- in *SUBP. If LENP is non-null, the length of the subscript is returned
- in *LENP. This returns newly-allocated memory. */
-char *
-array_variable_name (s, subp, lenp)
- char *s, **subp;
- int *lenp;
-{
- char *t, *ret;
- int ind, ni;
-
- t = mbschr (s, '[');
- if (t == 0)
- {
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = 0;
- return ((char *)NULL);
- }
- ind = t - s;
- ni = skipsubscript (s, ind, 0);
- if (ni <= ind + 1 || s[ni] != ']')
- {
- err_badarraysub (s);
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = 0;
- return ((char *)NULL);
- }
-
- *t = '\0';
- ret = savestring (s);
- *t++ = '['; /* ] */
-
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = ni - ind;
-
- return ret;
-}
-
-/* Return the variable specified by S without any subscript. If SUBP is
- non-null, return a pointer to the start of the subscript in *SUBP.
- If LENP is non-null, the length of the subscript is returned in *LENP. */
-SHELL_VAR *
-array_variable_part (s, subp, lenp)
- char *s, **subp;
- int *lenp;
-{
- char *t;
- SHELL_VAR *var;
-
- t = array_variable_name (s, subp, lenp);
- if (t == 0)
- return ((SHELL_VAR *)NULL);
- var = find_variable (t);
-
- free (t);
- return (var == 0 || invisible_p (var)) ? (SHELL_VAR *)0 : var;
-}
-
-#define INDEX_ERROR() \
- do \
- { \
- if (var) \
- err_badarraysub (var->name); \
- else \
- { \
- t[-1] = '\0'; \
- err_badarraysub (s); \
- t[-1] = '['; /* ] */\
- } \
- return ((char *)NULL); \
- } \
- while (0)
-
-/* Return a string containing the elements in the array and subscript
- described by S. If the subscript is * or @, obeys quoting rules akin
- to the expansion of $* and $@ including double quoting. If RTYPE
- is non-null it gets 1 if the array reference is name[*], 2 if the
- reference is name[@], and 0 otherwise. */
-static char *
-array_value_internal (s, quoted, flags, rtype, indp)
- char *s;
- int quoted, flags, *rtype;
- arrayind_t *indp;
-{
- int len;
- arrayind_t ind;
- char *akey;
- char *retval, *t, *temp;
- WORD_LIST *l;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* Expand the index, even if the variable doesn't exist, in case side
- effects are needed, like ${w[i++]} where w is unset. */
-#if 0
- if (var == 0)
- return (char *)NULL;
-#endif
-
- if (len == 0)
- return ((char *)NULL); /* error message already printed */
-
- /* [ */
- if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']')
- {
- if (rtype)
- *rtype = (t[0] == '*') ? 1 : 2;
- if ((flags & AV_ALLOWALL) == 0)
- {
- err_badarraysub (s);
- return ((char *)NULL);
- }
- else if (var == 0 || value_cell (var) == 0) /* XXX - check for invisible_p(var) ? */
- return ((char *)NULL);
- else if (array_p (var) == 0 && assoc_p (var) == 0)
- l = add_string_to_list (value_cell (var), (WORD_LIST *)NULL);
- else if (assoc_p (var))
- {
- l = assoc_to_word_list (assoc_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *)NULL);
- }
- else
- {
- l = array_to_word_list (array_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *) NULL);
- }
-
- if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- {
- temp = string_list_dollar_star (l);
- retval = quote_string (temp);
- free (temp);
- }
- else /* ${name[@]} or unquoted ${name[*]} */
- retval = string_list_dollar_at (l, quoted);
-
- dispose_words (l);
- }
- else
- {
- if (rtype)
- *rtype = 0;
- if (var == 0 || array_p (var) || assoc_p (var) == 0)
- {
- if ((flags & AV_USEIND) == 0 || indp == 0)
- {
- ind = array_expand_index (var, t, len);
- if (ind < 0)
- {
- /* negative subscripts to indexed arrays count back from end */
- if (var && array_p (var))
- ind = array_max_index (array_cell (var)) + 1 + ind;
- if (ind < 0)
- INDEX_ERROR();
- }
- if (indp)
- *indp = ind;
- }
- else if (indp)
- ind = *indp;
- }
- else if (assoc_p (var))
- {
- t[len - 1] = '\0';
- akey = expand_assignment_string_to_string (t, 0); /* [ */
- t[len - 1] = ']';
- if (akey == 0 || *akey == 0)
- INDEX_ERROR();
- }
-
- if (var == 0 || value_cell (var) == 0) /* XXX - check invisible_p(var) ? */
- return ((char *)NULL);
- if (array_p (var) == 0 && assoc_p (var) == 0)
- return (ind == 0 ? value_cell (var) : (char *)NULL);
- else if (assoc_p (var))
- {
- retval = assoc_reference (assoc_cell (var), akey);
- free (akey);
- }
- else
- retval = array_reference (array_cell (var), ind);
- }
-
- return retval;
-}
-
-/* Return a string containing the elements described by the array and
- subscript contained in S, obeying quoting for subscripts * and @. */
-char *
-array_value (s, quoted, flags, rtype, indp)
- char *s;
- int quoted, flags, *rtype;
- arrayind_t *indp;
-{
- return (array_value_internal (s, quoted, flags|AV_ALLOWALL, rtype, indp));
-}
-
-/* Return the value of the array indexing expression S as a single string.
- If (FLAGS & AV_ALLOWALL) is 0, do not allow `@' and `*' subscripts. This
- is used by other parts of the shell such as the arithmetic expression
- evaluator in expr.c. */
-char *
-get_array_value (s, flags, rtype, indp)
- char *s;
- int flags, *rtype;
- arrayind_t *indp;
-{
- return (array_value_internal (s, 0, flags, rtype, indp));
-}
-
-char *
-array_keys (s, quoted)
- char *s;
- int quoted;
-{
- int len;
- char *retval, *t, *temp;
- WORD_LIST *l;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* [ */
- if (var == 0 || ALL_ELEMENT_SUB (t[0]) == 0 || t[1] != ']')
- return (char *)NULL;
-
- if (var_isset (var) == 0 || invisible_p (var))
- return (char *)NULL;
-
- if (array_p (var) == 0 && assoc_p (var) == 0)
- l = add_string_to_list ("0", (WORD_LIST *)NULL);
- else if (assoc_p (var))
- l = assoc_keys_to_word_list (assoc_cell (var));
- else
- l = array_keys_to_word_list (array_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *) NULL);
-
- if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- {
- temp = string_list_dollar_star (l);
- retval = quote_string (temp);
- free (temp);
- }
- else /* ${!name[@]} or unquoted ${!name[*]} */
- retval = string_list_dollar_at (l, quoted);
-
- dispose_words (l);
- return retval;
-}
-#endif /* ARRAY_VARS */
+++ /dev/null
-/* arrayfunc.c -- High-level array functions used by other parts of the shell. */
-
-/* Copyright (C) 2001-2011 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#if defined (ARRAY_VARS)
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-#include <stdio.h>
-
-#include "bashintl.h"
-
-#include "shell.h"
-#include "pathexp.h"
-
-#include "shmbutil.h"
-
-#include "builtins/common.h"
-
-extern char *this_command_name;
-extern int last_command_exit_value;
-extern int array_needs_making;
-
-static SHELL_VAR *bind_array_var_internal __P((SHELL_VAR *, arrayind_t, char *, char *, int));
-static SHELL_VAR *assign_array_element_internal __P((SHELL_VAR *, char *, char *, char *, int, char *, int));
-
-static char *quote_assign __P((const char *));
-static void quote_array_assignment_chars __P((WORD_LIST *));
-static char *array_value_internal __P((char *, int, int, int *, arrayind_t *));
-
-/* Standard error message to use when encountering an invalid array subscript */
-const char * const bash_badsub_errmsg = N_("bad array subscript");
-
-/* **************************************************************** */
-/* */
-/* Functions to manipulate array variables and perform assignments */
-/* */
-/* **************************************************************** */
-
-/* Convert a shell variable to an array variable. The original value is
- saved as array[0]. */
-SHELL_VAR *
-convert_var_to_array (var)
- SHELL_VAR *var;
-{
- char *oldval;
- ARRAY *array;
-
- oldval = value_cell (var);
- array = array_create ();
- if (oldval)
- array_insert (array, 0, oldval);
-
- FREE (value_cell (var));
- var_setarray (var, array);
-
- /* these aren't valid anymore */
- var->dynamic_value = (sh_var_value_func_t *)NULL;
- var->assign_func = (sh_var_assign_func_t *)NULL;
-
- INVALIDATE_EXPORTSTR (var);
- if (exported_p (var))
- array_needs_making++;
-
- VSETATTR (var, att_array);
- VUNSETATTR (var, att_invisible);
-
- return var;
-}
-
-/* Convert a shell variable to an array variable. The original value is
- saved as array[0]. */
-SHELL_VAR *
-convert_var_to_assoc (var)
- SHELL_VAR *var;
-{
- char *oldval;
- HASH_TABLE *hash;
-
- oldval = value_cell (var);
- hash = assoc_create (0);
- if (oldval)
- assoc_insert (hash, savestring ("0"), oldval);
-
- FREE (value_cell (var));
- var_setassoc (var, hash);
-
- /* these aren't valid anymore */
- var->dynamic_value = (sh_var_value_func_t *)NULL;
- var->assign_func = (sh_var_assign_func_t *)NULL;
-
- INVALIDATE_EXPORTSTR (var);
- if (exported_p (var))
- array_needs_making++;
-
- VSETATTR (var, att_assoc);
- VUNSETATTR (var, att_invisible);
-
- return var;
-}
-
-static SHELL_VAR *
-bind_array_var_internal (entry, ind, key, value, flags)
- SHELL_VAR *entry;
- arrayind_t ind;
- char *key;
- char *value;
- int flags;
-{
- SHELL_VAR *dentry;
- char *newval;
-
- /* If we're appending, we need the old value of the array reference, so
- fake out make_variable_value with a dummy SHELL_VAR */
- if (flags & ASS_APPEND)
- {
- dentry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
- dentry->name = savestring (entry->name);
- if (assoc_p (entry))
- newval = assoc_reference (assoc_cell (entry), key);
- else
- newval = array_reference (array_cell (entry), ind);
- if (newval)
- dentry->value = savestring (newval);
- else
- {
- dentry->value = (char *)xmalloc (1);
- dentry->value[0] = '\0';
- }
- dentry->exportstr = 0;
- dentry->attributes = entry->attributes & ~(att_array|att_assoc|att_exported);
- /* Leave the rest of the members uninitialized; the code doesn't look
- at them. */
- newval = make_variable_value (dentry, value, flags);
- dispose_variable (dentry);
- }
- else
- newval = make_variable_value (entry, value, flags);
-
- if (entry->assign_func)
- (*entry->assign_func) (entry, newval, ind, key);
- else if (assoc_p (entry))
- assoc_insert (assoc_cell (entry), key, newval);
- else
- array_insert (array_cell (entry), ind, newval);
- FREE (newval);
-
- return (entry);
-}
-
-/* Perform an array assignment name[ind]=value. If NAME already exists and
- is not an array, and IND is 0, perform name=value instead. If NAME exists
- and is not an array, and IND is not 0, convert it into an array with the
- existing value as name[0].
-
- If NAME does not exist, just create an array variable, no matter what
- IND's value may be. */
-SHELL_VAR *
-bind_array_variable (name, ind, value, flags)
- char *name;
- arrayind_t ind;
- char *value;
- int flags;
-{
- SHELL_VAR *entry;
-
- entry = var_lookup (name, shell_variables);
-
- if (entry == (SHELL_VAR *) 0)
- entry = make_new_array_variable (name);
- else if (readonly_p (entry) || noassign_p (entry))
- {
- if (readonly_p (entry))
- err_readonly (name);
- return (entry);
- }
- else if (array_p (entry) == 0)
- entry = convert_var_to_array (entry);
-
- /* ENTRY is an array variable, and ARRAY points to the value. */
- return (bind_array_var_internal (entry, ind, 0, value, flags));
-}
-
-SHELL_VAR *
-bind_array_element (entry, ind, value, flags)
- SHELL_VAR *entry;
- arrayind_t ind;
- char *value;
- int flags;
-{
- return (bind_array_var_internal (entry, ind, 0, value, flags));
-}
-
-SHELL_VAR *
-bind_assoc_variable (entry, name, key, value, flags)
- SHELL_VAR *entry;
- char *name;
- char *key;
- char *value;
- int flags;
-{
- SHELL_VAR *dentry;
- char *newval;
-
- if (readonly_p (entry) || noassign_p (entry))
- {
- if (readonly_p (entry))
- err_readonly (name);
- return (entry);
- }
-
- return (bind_array_var_internal (entry, 0, key, value, flags));
-}
-
-/* Parse NAME, a lhs of an assignment statement of the form v[s], and
- assign VALUE to that array element by calling bind_array_variable(). */
-SHELL_VAR *
-assign_array_element (name, value, flags)
- char *name, *value;
- int flags;
-{
- char *sub, *vname;
- int sublen;
- SHELL_VAR *entry;
-
- vname = array_variable_name (name, &sub, &sublen);
-
- if (vname == 0)
- return ((SHELL_VAR *)NULL);
-
- if ((ALL_ELEMENT_SUB (sub[0]) && sub[1] == ']') || (sublen <= 1))
- {
- free (vname);
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
-
- entry = find_variable (vname);
- entry = assign_array_element_internal (entry, name, vname, sub, sublen, value, flags);
-
- free (vname);
- return entry;
-}
-
-static SHELL_VAR *
-assign_array_element_internal (entry, name, vname, sub, sublen, value, flags)
- SHELL_VAR *entry;
- char *name; /* only used for error messages */
- char *vname;
- char *sub;
- int sublen;
- char *value;
- int flags;
-{
- char *akey;
- arrayind_t ind;
-
- if (entry && assoc_p (entry))
- {
- sub[sublen-1] = '\0';
- akey = expand_assignment_string_to_string (sub, 0); /* [ */
- sub[sublen-1] = ']';
- if (akey == 0 || *akey == 0)
- {
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
- entry = bind_assoc_variable (entry, vname, akey, value, flags);
- }
- else
- {
- ind = array_expand_index (entry, sub, sublen);
- if (ind < 0)
- {
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
- }
- entry = bind_array_variable (vname, ind, value, flags);
- }
-
- return (entry);
-}
-
-/* Find the array variable corresponding to NAME. If there is no variable,
- create a new array variable. If the variable exists but is not an array,
- convert it to an indexed array. If FLAGS&1 is non-zero, an existing
- variable is checked for the readonly or noassign attribute in preparation
- for assignment (e.g., by the `read' builtin). If FLAGS&2 is non-zero, we
- create an associative array. */
-SHELL_VAR *
-find_or_make_array_variable (name, flags)
- char *name;
- int flags;
-{
- SHELL_VAR *var;
-
- var = find_variable (name);
-
- if (var == 0)
- var = (flags & 2) ? make_new_assoc_variable (name) : make_new_array_variable (name);
- else if ((flags & 1) && (readonly_p (var) || noassign_p (var)))
- {
- if (readonly_p (var))
- err_readonly (name);
- return ((SHELL_VAR *)NULL);
- }
- else if ((flags & 2) && array_p (var))
- {
- report_error (_("%s: cannot convert indexed to associative array"), name);
- return ((SHELL_VAR *)NULL);
- }
- else if (array_p (var) == 0 && assoc_p (var) == 0)
- var = convert_var_to_array (var);
-
- return (var);
-}
-
-/* Perform a compound assignment statement for array NAME, where VALUE is
- the text between the parens: NAME=( VALUE ) */
-SHELL_VAR *
-assign_array_from_string (name, value, flags)
- char *name, *value;
- int flags;
-{
- SHELL_VAR *var;
- int vflags;
-
- vflags = 1;
- if (flags & ASS_MKASSOC)
- vflags |= 2;
-
- var = find_or_make_array_variable (name, vflags);
- if (var == 0)
- return ((SHELL_VAR *)NULL);
-
- return (assign_array_var_from_string (var, value, flags));
-}
-
-/* Sequentially assign the indices of indexed array variable VAR from the
- words in LIST. */
-SHELL_VAR *
-assign_array_var_from_word_list (var, list, flags)
- SHELL_VAR *var;
- WORD_LIST *list;
- int flags;
-{
- register arrayind_t i;
- register WORD_LIST *l;
- ARRAY *a;
-
- a = array_cell (var);
- i = (flags & ASS_APPEND) ? array_max_index (a) + 1 : 0;
-
- for (l = list; l; l = l->next, i++)
- if (var->assign_func)
- (*var->assign_func) (var, l->word->word, i, 0);
- else
- array_insert (a, i, l->word->word);
- return var;
-}
-
-WORD_LIST *
-expand_compound_array_assignment (var, value, flags)
- SHELL_VAR *var;
- char *value;
- int flags;
-{
- WORD_LIST *list, *nlist;
- WORD_LIST *hd, *tl, *t, *n;
- char *val;
- int ni;
-
- /* This condition is true when invoked from the declare builtin with a
- command like
- declare -a d='([1]="" [2]="bdef" [5]="hello world" "test")' */
- if (*value == '(') /*)*/
- {
- ni = 1;
- val = extract_array_assignment_list (value, &ni);
- if (val == 0)
- return (WORD_LIST *)NULL;
- }
- else
- val = value;
-
- /* Expand the value string into a list of words, performing all the
- shell expansions including pathname generation and word splitting. */
- /* First we split the string on whitespace, using the shell parser
- (ksh93 seems to do this). */
- list = parse_string_to_word_list (val, 1, "array assign");
-
- if (var && (assoc_p (var))
- {
- if (val != value)
- free (val);
- return list;
- }
-
- /* If we're using [subscript]=value, we need to quote each [ and ] to
- prevent unwanted filename expansion. This doesn't need to be done
- for associative array expansion, since that uses a different expansion
- function (see assign_compound_array_list below). */
- if (list)
- quote_array_assignment_chars (list);
-
- /* Now that we've split it, perform the shell expansions on each
- word in the list. */
- nlist = list ? expand_words_no_vars (list) : (WORD_LIST *)NULL;
-
- dispose_words (list);
-
- if (val != value)
- free (val);
-
- return nlist;
-}
-
-/* Callers ensure that VAR is not NULL */
-void
-assign_compound_array_list (var, nlist, flags)
- SHELL_VAR *var;
- WORD_LIST *nlist;
- int flags;
-{
- ARRAY *a;
- HASH_TABLE *h;
- WORD_LIST *list;
- char *w, *val, *nval;
- int len, iflags, free_val;
- arrayind_t ind, last_ind;
- char *akey;
-
- a = (var && array_p (var)) ? array_cell (var) : (ARRAY *)0;
- h = (var && assoc_p (var)) ? assoc_cell (var) : (HASH_TABLE *)0;
-
- akey = (char *)0;
- ind = 0;
-
- /* Now that we are ready to assign values to the array, kill the existing
- value. */
- if ((flags & ASS_APPEND) == 0)
- {
- if (a && array_p (var))
- array_flush (a);
- else if (h && assoc_p (var))
- assoc_flush (h);
- }
-
- last_ind = (a && (flags & ASS_APPEND)) ? array_max_index (a) + 1 : 0;
-
- for (list = nlist; list; list = list->next)
- {
- iflags = flags;
- w = list->word->word;
-
- /* We have a word of the form [ind]=value */
- if ((list->word->flags & W_ASSIGNMENT) && w[0] == '[')
- {
- /* Don't have to handle embedded quotes specially any more, since
- associative array subscripts have not been expanded yet (see
- above). */
- len = skipsubscript (w, 0, 0);
-
- /* XXX - changes for `+=' */
- if (w[len] != ']' || (w[len+1] != '=' && (w[len+1] != '+' || w[len+2] != '=')))
- {
- if (assoc_p (var))
- {
- err_badarraysub (w);
- continue;
- }
- nval = make_variable_value (var, w, flags);
- if (var->assign_func)
- (*var->assign_func) (var, nval, last_ind, 0);
- else
- array_insert (a, last_ind, nval);
- FREE (nval);
- last_ind++;
- continue;
- }
-
- if (len == 1)
- {
- err_badarraysub (w);
- continue;
- }
-
- if (ALL_ELEMENT_SUB (w[1]) && len == 2)
- {
- if (assoc_p (var))
- report_error (_("%s: invalid associative array key"), w);
- else
- report_error (_("%s: cannot assign to non-numeric index"), w);
- continue;
- }
-
- if (array_p (var))
- {
- ind = array_expand_index (var, w + 1, len);
- if (ind < 0)
- {
- err_badarraysub (w);
- continue;
- }
-
- last_ind = ind;
- }
- else if (assoc_p (var))
- {
- /* This is not performed above, see expand_compound_array_assignment */
- w[len] = '\0'; /*[*/
- akey = expand_assignment_string_to_string (w+1, 0);
- w[len] = ']';
- /* And we need to expand the value also, see below */
- if (akey == 0 || *akey == 0)
- {
- err_badarraysub (w);
- continue;
- }
- }
-
- /* XXX - changes for `+=' -- just accept the syntax. ksh93 doesn't do this */
- if (w[len + 1] == '+' && w[len + 2] == '=')
- {
- iflags |= ASS_APPEND;
- val = w + len + 3;
- }
- else
- val = w + len + 2;
- }
- else if (assoc_p (var))
- {
- report_error (_("%s: %s: must use subscript when assigning associative array"), var->name, w);
- continue;
- }
- else /* No [ind]=value, just a stray `=' */
- {
- ind = last_ind;
- val = w;
- }
-
- free_val = 0;
- /* See above; we need to expand the value here */
- if (assoc_p (var))
- {
- val = expand_assignment_string_to_string (val, 0);
- free_val = 1;
- }
-
- if (integer_p (var))
- this_command_name = (char *)NULL; /* no command name for errors */
- bind_array_var_internal (var, ind, akey, val, iflags);
- last_ind++;
-
- if (free_val)
- free (val);
- }
-}
-
-/* Perform a compound array assignment: VAR->name=( VALUE ). The
- VALUE has already had the parentheses stripped. */
-SHELL_VAR *
-assign_array_var_from_string (var, value, flags)
- SHELL_VAR *var;
- char *value;
- int flags;
-{
- WORD_LIST *nlist;
-
- if (value == 0)
- return var;
-
- nlist = expand_compound_array_assignment (var, value, flags);
- assign_compound_array_list (var, nlist, flags);
-
- if (nlist)
- dispose_words (nlist);
- return (var);
-}
-
-/* Quote globbing chars and characters in $IFS before the `=' in an assignment
- statement (usually a compound array assignment) to protect them from
- unwanted filename expansion or word splitting. */
-static char *
-quote_assign (string)
- const char *string;
-{
- size_t slen;
- int saw_eq;
- char *temp, *t, *subs;
- const char *s, *send;
- int ss, se;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- send = string + slen;
-
- t = temp = (char *)xmalloc (slen * 2 + 1);
- saw_eq = 0;
- for (s = string; *s; )
- {
- if (*s == '=')
- saw_eq = 1;
- if (saw_eq == 0 && *s == '[') /* looks like a subscript */
- {
- ss = s - string;
- se = skipsubscript (string, ss, 0);
- subs = substring (s, ss, se);
- *t++ = '\\';
- strcpy (t, subs);
- t += se - ss;
- *t++ = '\\';
- *t++ = ']';
- s += se + 1;
- free (subs);
- continue;
- }
- if (saw_eq == 0 && (glob_char_p (s) || isifs (*s)))
- *t++ = '\\';
-
- COPY_CHAR_P (t, s, send);
- }
- *t = '\0';
- return temp;
-}
-
-/* For each word in a compound array assignment, if the word looks like
- [ind]=value, quote globbing chars and characters in $IFS before the `='. */
-static void
-quote_array_assignment_chars (list)
- WORD_LIST *list;
-{
- char *nword;
- WORD_LIST *l;
-
- for (l = list; l; l = l->next)
- {
- if (l->word == 0 || l->word->word == 0 || l->word->word[0] == '\0')
- continue; /* should not happen, but just in case... */
- /* Don't bother if it doesn't look like [ind]=value */
- if (l->word->word[0] != '[' || mbschr (l->word->word, '=') == 0) /* ] */
- continue;
- nword = quote_assign (l->word->word);
- free (l->word->word);
- l->word->word = nword;
- }
-}
-
-/* skipsubscript moved to subst.c to use private functions. 2009/02/24. */
-
-/* This function is called with SUB pointing to just after the beginning
- `[' of an array subscript and removes the array element to which SUB
- expands from array VAR. A subscript of `*' or `@' unsets the array. */
-int
-unbind_array_element (var, sub)
- SHELL_VAR *var;
- char *sub;
-{
- int len;
- arrayind_t ind;
- char *akey;
- ARRAY_ELEMENT *ae;
-
- len = skipsubscript (sub, 0, 0);
- if (sub[len] != ']' || len == 0)
- {
- builtin_error ("%s[%s: %s", var->name, sub, _(bash_badsub_errmsg));
- return -1;
- }
- sub[len] = '\0';
-
- if (ALL_ELEMENT_SUB (sub[0]) && sub[1] == 0)
- {
- unbind_variable (var->name);
- return (0);
- }
-
- if (assoc_p (var))
- {
- akey = expand_assignment_string_to_string (sub, 0); /* [ */
- if (akey == 0 || *akey == 0)
- {
- builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
- return -1;
- }
- assoc_remove (assoc_cell (var), akey);
- free (akey);
- }
- else
- {
- ind = array_expand_index (var, sub, len+1);
- if (ind < 0)
- {
- builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
- return -1;
- }
- ae = array_remove (array_cell (var), ind);
- if (ae)
- array_dispose_element (ae);
- }
-
- return 0;
-}
-
-/* Format and output an array assignment in compound form VAR=(VALUES),
- suitable for re-use as input. */
-void
-print_array_assignment (var, quoted)
- SHELL_VAR *var;
- int quoted;
-{
- char *vstr;
-
- vstr = array_to_assign (array_cell (var), quoted);
-
- if (vstr == 0)
- printf ("%s=%s\n", var->name, quoted ? "'()'" : "()");
- else
- {
- printf ("%s=%s\n", var->name, vstr);
- free (vstr);
- }
-}
-
-/* Format and output an associative array assignment in compound form
- VAR=(VALUES), suitable for re-use as input. */
-void
-print_assoc_assignment (var, quoted)
- SHELL_VAR *var;
- int quoted;
-{
- char *vstr;
-
- vstr = assoc_to_assign (assoc_cell (var), quoted);
-
- if (vstr == 0)
- printf ("%s=%s\n", var->name, quoted ? "'()'" : "()");
- else
- {
- printf ("%s=%s\n", var->name, vstr);
- free (vstr);
- }
-}
-
-/***********************************************************************/
-/* */
-/* Utility functions to manage arrays and their contents for expansion */
-/* */
-/***********************************************************************/
-
-/* Return 1 if NAME is a properly-formed array reference v[sub]. */
-int
-valid_array_reference (name)
- char *name;
-{
- char *t;
- int r, len;
-
- t = mbschr (name, '['); /* ] */
- if (t)
- {
- *t = '\0';
- r = legal_identifier (name);
- *t = '[';
- if (r == 0)
- return 0;
- /* Check for a properly-terminated non-blank subscript. */
- len = skipsubscript (t, 0, 0);
- if (t[len] != ']' || len == 1)
- return 0;
- for (r = 1; r < len; r++)
- if (whitespace (t[r]) == 0)
- return 1;
- return 0;
- }
- return 0;
-}
-
-/* Expand the array index beginning at S and extending LEN characters. */
-arrayind_t
-array_expand_index (var, s, len)
- SHELL_VAR *var;
- char *s;
- int len;
-{
- char *exp, *t;
- int expok;
- arrayind_t val;
-
- exp = (char *)xmalloc (len);
- strncpy (exp, s, len - 1);
- exp[len - 1] = '\0';
- t = expand_arith_string (exp, 0);
- this_command_name = (char *)NULL;
- val = evalexp (t, &expok);
- free (t);
- free (exp);
- if (expok == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
-
- top_level_cleanup ();
- jump_to_top_level (DISCARD);
- }
- return val;
-}
-
-/* Return the name of the variable specified by S without any subscript.
- If SUBP is non-null, return a pointer to the start of the subscript
- in *SUBP. If LENP is non-null, the length of the subscript is returned
- in *LENP. This returns newly-allocated memory. */
-char *
-array_variable_name (s, subp, lenp)
- char *s, **subp;
- int *lenp;
-{
- char *t, *ret;
- int ind, ni;
-
- t = mbschr (s, '[');
- if (t == 0)
- {
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = 0;
- return ((char *)NULL);
- }
- ind = t - s;
- ni = skipsubscript (s, ind, 0);
- if (ni <= ind + 1 || s[ni] != ']')
- {
- err_badarraysub (s);
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = 0;
- return ((char *)NULL);
- }
-
- *t = '\0';
- ret = savestring (s);
- *t++ = '['; /* ] */
-
- if (subp)
- *subp = t;
- if (lenp)
- *lenp = ni - ind;
-
- return ret;
-}
-
-/* Return the variable specified by S without any subscript. If SUBP is
- non-null, return a pointer to the start of the subscript in *SUBP.
- If LENP is non-null, the length of the subscript is returned in *LENP. */
-SHELL_VAR *
-array_variable_part (s, subp, lenp)
- char *s, **subp;
- int *lenp;
-{
- char *t;
- SHELL_VAR *var;
-
- t = array_variable_name (s, subp, lenp);
- if (t == 0)
- return ((SHELL_VAR *)NULL);
- var = find_variable (t);
-
- free (t);
- return (var == 0 || invisible_p (var)) ? (SHELL_VAR *)0 : var;
-}
-
-#define INDEX_ERROR() \
- do \
- { \
- if (var) \
- err_badarraysub (var->name); \
- else \
- { \
- t[-1] = '\0'; \
- err_badarraysub (s); \
- t[-1] = '['; /* ] */\
- } \
- return ((char *)NULL); \
- } \
- while (0)
-
-/* Return a string containing the elements in the array and subscript
- described by S. If the subscript is * or @, obeys quoting rules akin
- to the expansion of $* and $@ including double quoting. If RTYPE
- is non-null it gets 1 if the array reference is name[*], 2 if the
- reference is name[@], and 0 otherwise. */
-static char *
-array_value_internal (s, quoted, flags, rtype, indp)
- char *s;
- int quoted, flags, *rtype;
- arrayind_t *indp;
-{
- int len;
- arrayind_t ind;
- char *akey;
- char *retval, *t, *temp;
- WORD_LIST *l;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* Expand the index, even if the variable doesn't exist, in case side
- effects are needed, like ${w[i++]} where w is unset. */
-#if 0
- if (var == 0)
- return (char *)NULL;
-#endif
-
- if (len == 0)
- return ((char *)NULL); /* error message already printed */
-
- /* [ */
- if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']')
- {
- if (rtype)
- *rtype = (t[0] == '*') ? 1 : 2;
- if ((flags & AV_ALLOWALL) == 0)
- {
- err_badarraysub (s);
- return ((char *)NULL);
- }
- else if (var == 0 || value_cell (var) == 0) /* XXX - check for invisible_p(var) ? */
- return ((char *)NULL);
- else if (array_p (var) == 0 && assoc_p (var) == 0)
- l = add_string_to_list (value_cell (var), (WORD_LIST *)NULL);
- else if (assoc_p (var))
- {
- l = assoc_to_word_list (assoc_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *)NULL);
- }
- else
- {
- l = array_to_word_list (array_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *) NULL);
- }
-
- if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- {
- temp = string_list_dollar_star (l);
- retval = quote_string (temp);
- free (temp);
- }
- else /* ${name[@]} or unquoted ${name[*]} */
- retval = string_list_dollar_at (l, quoted);
-
- dispose_words (l);
- }
- else
- {
- if (rtype)
- *rtype = 0;
- if (var == 0 || array_p (var) || assoc_p (var) == 0)
- {
- if ((flags & AV_USEIND) == 0 || indp == 0)
- {
- ind = array_expand_index (var, t, len);
- if (ind < 0)
- {
- /* negative subscripts to indexed arrays count back from end */
- if (var && array_p (var))
- ind = array_max_index (array_cell (var)) + 1 + ind;
- if (ind < 0)
- INDEX_ERROR();
- }
- if (indp)
- *indp = ind;
- }
- else if (indp)
- ind = *indp;
- }
- else if (assoc_p (var))
- {
- t[len - 1] = '\0';
- akey = expand_assignment_string_to_string (t, 0); /* [ */
- t[len - 1] = ']';
- if (akey == 0 || *akey == 0)
- INDEX_ERROR();
- }
-
- if (var == 0 || value_cell (var) == 0) /* XXX - check invisible_p(var) ? */
- return ((char *)NULL);
- if (array_p (var) == 0 && assoc_p (var) == 0)
- return (ind == 0 ? value_cell (var) : (char *)NULL);
- else if (assoc_p (var))
- {
- retval = assoc_reference (assoc_cell (var), akey);
- free (akey);
- }
- else
- retval = array_reference (array_cell (var), ind);
- }
-
- return retval;
-}
-
-/* Return a string containing the elements described by the array and
- subscript contained in S, obeying quoting for subscripts * and @. */
-char *
-array_value (s, quoted, flags, rtype, indp)
- char *s;
- int quoted, flags, *rtype;
- arrayind_t *indp;
-{
- return (array_value_internal (s, quoted, flags|AV_ALLOWALL, rtype, indp));
-}
-
-/* Return the value of the array indexing expression S as a single string.
- If (FLAGS & AV_ALLOWALL) is 0, do not allow `@' and `*' subscripts. This
- is used by other parts of the shell such as the arithmetic expression
- evaluator in expr.c. */
-char *
-get_array_value (s, flags, rtype, indp)
- char *s;
- int flags, *rtype;
- arrayind_t *indp;
-{
- return (array_value_internal (s, 0, flags, rtype, indp));
-}
-
-char *
-array_keys (s, quoted)
- char *s;
- int quoted;
-{
- int len;
- char *retval, *t, *temp;
- WORD_LIST *l;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* [ */
- if (var == 0 || ALL_ELEMENT_SUB (t[0]) == 0 || t[1] != ']')
- return (char *)NULL;
-
- if (var_isset (var) == 0 || invisible_p (var))
- return (char *)NULL;
-
- if (array_p (var) == 0 && assoc_p (var) == 0)
- l = add_string_to_list ("0", (WORD_LIST *)NULL);
- else if (assoc_p (var))
- l = assoc_keys_to_word_list (assoc_cell (var));
- else
- l = array_keys_to_word_list (array_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *) NULL);
-
- if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- {
- temp = string_list_dollar_star (l);
- retval = quote_string (temp);
- free (temp);
- }
- else /* ${!name[@]} or unquoted ${!name[*]} */
- retval = string_list_dollar_at (l, quoted);
-
- dispose_words (l);
- return retval;
-}
-#endif /* ARRAY_VARS */
+++ /dev/null
-/* arrayfunc.h -- declarations for miscellaneous array functions in arrayfunc.c */
-
-/* Copyright (C) 2001-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined (_ARRAYFUNC_H_)
-#define _ARRAYFUNC_H_
-
-/* Must include variables.h before including this file. */
-
-#if defined (ARRAY_VARS)
-
-/* Flags for array_value_internal and callers array_value/get_array_value */
-#define AV_ALLOWALL 0x001
-#define AV_QUOTED 0x002
-#define AV_USEIND 0x004
-
-extern SHELL_VAR *convert_var_to_array __P((SHELL_VAR *));
-extern SHELL_VAR *convert_var_to_assoc __P((SHELL_VAR *));
-
-extern SHELL_VAR *bind_array_variable __P((char *, arrayind_t, char *, int));
-extern SHELL_VAR *bind_array_element __P((SHELL_VAR *, arrayind_t, char *, int));
-extern SHELL_VAR *assign_array_element __P((char *, char *, int));
-
-extern SHELL_VAR *bind_assoc_variable __P((SHELL_VAR *, char *, char *, char *, int));
-
-extern SHELL_VAR *find_or_make_array_variable __P((char *, int));
-
-extern SHELL_VAR *assign_array_from_string __P((char *, char *, int));
-extern SHELL_VAR *assign_array_var_from_word_list __P((SHELL_VAR *, WORD_LIST *, int));
-
-extern WORD_LIST *expand_compound_array_assignment __P((SHELL_VAR *, char *, int));
-extern void assign_compound_array_list __P((SHELL_VAR *, WORD_LIST *, int));
-extern SHELL_VAR *assign_array_var_from_string __P((SHELL_VAR *, char *, int));
-
-extern int unbind_array_element __P((SHELL_VAR *, char *));
-extern int skipsubscript __P((const char *, int, int));
-
-extern void print_array_assignment __P((SHELL_VAR *, int));
-extern void print_assoc_assignment __P((SHELL_VAR *, int));
-
-extern arrayind_t array_expand_index __P((char *, int));
-extern int valid_array_reference __P((char *));
-extern char *array_value __P((char *, int, int, int *, arrayind_t *));
-extern char *get_array_value __P((char *, int, int *, arrayind_t *));
-
-extern char *array_keys __P((char *, int));
-
-extern char *array_variable_name __P((char *, char **, int *));
-extern SHELL_VAR *array_variable_part __P((char *, char **, int *));
-
-#endif
-
-#endif /* !_ARRAYFUNC_H_ */
+++ /dev/null
-/* bashhist.c -- bash interface to the GNU history library. */
-
-/* Copyright (C) 1993-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#if defined (HISTORY)
-
-#if defined (HAVE_UNISTD_H)
-# ifdef _MINIX
-# include <sys/types.h>
-# endif
-# include <unistd.h>
-#endif
-
-#include "bashtypes.h"
-#include <stdio.h>
-#include <errno.h>
-#include "bashansi.h"
-#include "posixstat.h"
-#include "filecntl.h"
-
-#include "bashintl.h"
-
-#if defined (SYSLOG_HISTORY)
-# include <syslog.h>
-#endif
-
-#include "shell.h"
-#include "flags.h"
-#include "input.h"
-#include "parser.h" /* for the struct dstack stuff. */
-#include "pathexp.h" /* for the struct ignorevar stuff */
-#include "bashhist.h" /* matching prototypes and declarations */
-#include "builtins/common.h"
-
-#include <readline/history.h>
-#include <glob/glob.h>
-#include <glob/strmatch.h>
-
-#if defined (READLINE)
-# include "bashline.h"
-extern int rl_done, rl_dispatching; /* should really include readline.h */
-#endif
-
-#if !defined (errno)
-extern int errno;
-#endif
-
-static int histignore_item_func __P((struct ign *));
-static int check_history_control __P((char *));
-static void hc_erasedups __P((char *));
-static void really_add_history __P((char *));
-
-static struct ignorevar histignore =
-{
- "HISTIGNORE",
- (struct ign *)0,
- 0,
- (char *)0,
- (sh_iv_item_func_t *)histignore_item_func,
-};
-
-#define HIGN_EXPAND 0x01
-
-/* Declarations of bash history variables. */
-/* Non-zero means to remember lines typed to the shell on the history
- list. This is different than the user-controlled behaviour; this
- becomes zero when we read lines from a file, for example. */
-int remember_on_history = 1;
-int enable_history_list = 1; /* value for `set -o history' */
-
-/* The number of lines that Bash has added to this history session. The
- difference between the number of the top element in the history list
- (offset from history_base) and the number of lines in the history file.
- Appending this session's history to the history file resets this to 0. */
-int history_lines_this_session;
-
-/* The number of lines that Bash has read from the history file. */
-int history_lines_in_file;
-
-#if defined (BANG_HISTORY)
-/* Non-zero means do no history expansion on this line, regardless
- of what history_expansion says. */
-int history_expansion_inhibited;
-#endif
-
-/* With the old default, every line was saved in the history individually.
- I.e., if the user enters:
- bash$ for i in a b c
- > do
- > echo $i
- > done
- Each line will be individually saved in the history.
- bash$ history
- 10 for i in a b c
- 11 do
- 12 echo $i
- 13 done
- 14 history
- If the variable command_oriented_history is set, multiple lines
- which form one command will be saved as one history entry.
- bash$ for i in a b c
- > do
- > echo $i
- > done
- bash$ history
- 10 for i in a b c
- do
- echo $i
- done
- 11 history
- The user can then recall the whole command all at once instead
- of just being able to recall one line at a time.
-
- This is now enabled by default.
- */
-int command_oriented_history = 1;
-
-/* Set to 1 if the first line of a possibly-multi-line command was saved
- in the history list. Managed by maybe_add_history(), but global so
- the history-manipluating builtins can see it. */
-int current_command_first_line_saved = 0;
-
-/* Non-zero means to store newlines in the history list when using
- command_oriented_history rather than trying to use semicolons. */
-int literal_history;
-
-/* Non-zero means to append the history to the history file at shell
- exit, even if the history has been stifled. */
-int force_append_history;
-
-/* A nit for picking at history saving. Flags have the following values:
-
- Value == 0 means save all lines parsed by the shell on the history.
- Value & HC_IGNSPACE means save all lines that do not start with a space.
- Value & HC_IGNDUPS means save all lines that do not match the last
- line saved.
- Value & HC_ERASEDUPS means to remove all other matching lines from the
- history list before saving the latest line. */
-int history_control;
-
-/* Set to 1 if the last command was added to the history list successfully
- as a separate history entry; set to 0 if the line was ignored or added
- to a previous entry as part of command-oriented-history processing. */
-int hist_last_line_added;
-
-/* Set to 1 if builtins/history.def:push_history added the last history
- entry. */
-int hist_last_line_pushed;
-
-#if defined (READLINE)
-/* If non-zero, and readline is being used, the user is offered the
- chance to re-edit a failed history expansion. */
-int history_reediting;
-
-/* If non-zero, and readline is being used, don't directly execute a
- line with history substitution. Reload it into the editing buffer
- instead and let the user further edit and confirm with a newline. */
-int hist_verify;
-
-#endif /* READLINE */
-
-/* Non-zero means to not save function definitions in the history list. */
-int dont_save_function_defs;
-
-/* Variables declared in other files used here. */
-extern int current_command_line_count;
-
-extern struct dstack dstack;
-extern int parser_state;
-
-static int bash_history_inhibit_expansion __P((char *, int));
-#if defined (READLINE)
-static void re_edit __P((char *));
-#endif
-static int history_expansion_p __P((char *));
-static int shell_comment __P((char *));
-static int should_expand __P((char *));
-static HIST_ENTRY *last_history_entry __P((void));
-static char *expand_histignore_pattern __P((char *));
-static int history_should_ignore __P((char *));
-
-/* Is the history expansion starting at string[i] one that should not
- be expanded? */
-static int
-bash_history_inhibit_expansion (string, i)
- char *string;
- int i;
-{
- /* The shell uses ! as a pattern negation character in globbing [...]
- expressions, so let those pass without expansion. */
- if (i > 0 && (string[i - 1] == '[') && member (']', string + i + 1))
- return (1);
- /* The shell uses ! as the indirect expansion character, so let those
- expansions pass as well. */
- else if (i > 1 && string[i - 1] == '{' && string[i - 2] == '$' &&
- member ('}', string + i + 1))
- return (1);
- /* The shell uses $! as a defined parameter expansion. */
- else if (i > 1 && string[i - 1] == '$' && string[i] == '!')
- return (1);
-#if defined (EXTENDED_GLOB)
- else if (extended_glob && i > 1 && string[i+1] == '(' && member (')', string + i + 2))
- return (1);
-#endif
- else
- return (0);
-}
-
-void
-bash_initialize_history ()
-{
- history_quotes_inhibit_expansion = 1;
- history_search_delimiter_chars = ";&()|<>";
- history_inhibit_expansion_function = bash_history_inhibit_expansion;
-#if defined (BANG_HISTORY)
- sv_histchars ("histchars");
-#endif
-}
-
-void
-bash_history_reinit (interact)
- int interact;
-{
-#if defined (BANG_HISTORY)
- history_expansion = interact != 0;
- history_expansion_inhibited = 1;
-#endif
- remember_on_history = enable_history_list = interact != 0;
- history_inhibit_expansion_function = bash_history_inhibit_expansion;
-}
-
-void
-bash_history_disable ()
-{
- remember_on_history = 0;
-#if defined (BANG_HISTORY)
- history_expansion_inhibited = 1;
-#endif
-}
-
-void
-bash_history_enable ()
-{
- remember_on_history = 1;
-#if defined (BANG_HISTORY)
- history_expansion_inhibited = 0;
-#endif
- history_inhibit_expansion_function = bash_history_inhibit_expansion;
- sv_history_control ("HISTCONTROL");
- sv_histignore ("HISTIGNORE");
-}
-
-/* Load the history list from the history file. */
-void
-load_history ()
-{
- char *hf;
-
- /* Truncate history file for interactive shells which desire it.
- Note that the history file is automatically truncated to the
- size of HISTSIZE if the user does not explicitly set the size
- differently. */
- set_if_not ("HISTSIZE", "500");
- sv_histsize ("HISTSIZE");
-
- set_if_not ("HISTFILESIZE", get_string_value ("HISTSIZE"));
- sv_histsize ("HISTFILESIZE");
-
- /* Read the history in HISTFILE into the history list. */
- hf = get_string_value ("HISTFILE");
-
- if (hf && *hf && file_exists (hf))
- {
- read_history (hf);
- using_history ();
- history_lines_in_file = where_history ();
- }
-}
-
-void
-bash_clear_history ()
-{
- clear_history ();
- history_lines_this_session = 0;
-}
-
-/* Delete and free the history list entry at offset I. */
-int
-bash_delete_histent (i)
- int i;
-{
- HIST_ENTRY *discard;
-
- discard = remove_history (i);
- if (discard)
- free_history_entry (discard);
- history_lines_this_session--;
-
- return 1;
-}
-
-int
-bash_delete_last_history ()
-{
- register int i;
- HIST_ENTRY **hlist, *histent;
- int r;
-
- hlist = history_list ();
- if (hlist == NULL)
- return 0;
-
- for (i = 0; hlist[i]; i++)
- ;
- i--;
-
- /* History_get () takes a parameter that must be offset by history_base. */
- histent = history_get (history_base + i); /* Don't free this */
- if (histent == NULL)
- return 0;
-
- r = bash_delete_histent (i);
-
- if (where_history () > history_length)
- history_set_pos (history_length);
-
- return r;
-}
-
-#ifdef INCLUDE_UNUSED
-/* Write the existing history out to the history file. */
-void
-save_history ()
-{
- char *hf;
-
- hf = get_string_value ("HISTFILE");
- if (hf && *hf && file_exists (hf))
- {
- /* Append only the lines that occurred this session to
- the history file. */
- using_history ();
-
- if (history_lines_this_session <= where_history () || force_append_history)
- append_history (history_lines_this_session, hf);
- else
- write_history (hf);
- sv_histsize ("HISTFILESIZE");
- }
-}
-#endif
-
-int
-maybe_append_history (filename)
- char *filename;
-{
- int fd, result;
- struct stat buf;
-
- result = EXECUTION_SUCCESS;
- if (history_lines_this_session && (history_lines_this_session <= where_history ()))
- {
- /* If the filename was supplied, then create it if necessary. */
- if (stat (filename, &buf) == -1 && errno == ENOENT)
- {
- fd = open (filename, O_WRONLY|O_CREAT, 0600);
- if (fd < 0)
- {
- builtin_error (_("%s: cannot create: %s"), filename, strerror (errno));
- return (EXECUTION_FAILURE);
- }
- close (fd);
- }
- result = append_history (history_lines_this_session, filename);
- history_lines_in_file += history_lines_this_session;
- history_lines_this_session = 0;
- }
- return (result);
-}
-
-/* If this is an interactive shell, then append the lines executed
- this session to the history file. */
-int
-maybe_save_shell_history ()
-{
- int result;
- char *hf;
-
- result = 0;
- if (history_lines_this_session)
- {
- hf = get_string_value ("HISTFILE");
-
- if (hf && *hf)
- {
- /* If the file doesn't exist, then create it. */
- if (file_exists (hf) == 0)
- {
- int file;
- file = open (hf, O_CREAT | O_TRUNC | O_WRONLY, 0600);
- if (file != -1)
- close (file);
- }
-
- /* Now actually append the lines if the history hasn't been
- stifled. If the history has been stifled, rewrite the
- history file. */
- using_history ();
- if (history_lines_this_session <= where_history () || force_append_history)
- {
- result = append_history (history_lines_this_session, hf);
- history_lines_in_file += history_lines_this_session;
- }
- else
- {
- result = write_history (hf);
- history_lines_in_file = history_lines_this_session;
- }
- history_lines_this_session = 0;
-
- sv_histsize ("HISTFILESIZE");
- }
- }
- return (result);
-}
-
-#if defined (READLINE)
-/* Tell readline () that we have some text for it to edit. */
-static void
-re_edit (text)
- char *text;
-{
- if (bash_input.type == st_stdin)
- bash_re_edit (text);
-}
-#endif /* READLINE */
-
-/* Return 1 if this line needs history expansion. */
-static int
-history_expansion_p (line)
- char *line;
-{
- register char *s;
-
- for (s = line; *s; s++)
- if (*s == history_expansion_char || *s == history_subst_char)
- return 1;
- return 0;
-}
-
-/* Do pre-processing on LINE. If PRINT_CHANGES is non-zero, then
- print the results of expanding the line if there were any changes.
- If there is an error, return NULL, otherwise the expanded line is
- returned. If ADDIT is non-zero the line is added to the history
- list after history expansion. ADDIT is just a suggestion;
- REMEMBER_ON_HISTORY can veto, and does.
- Right now this does history expansion. */
-char *
-pre_process_line (line, print_changes, addit)
- char *line;
- int print_changes, addit;
-{
- char *history_value;
- char *return_value;
- int expanded;
-
- return_value = line;
- expanded = 0;
-
-# if defined (BANG_HISTORY)
- /* History expand the line. If this results in no errors, then
- add that line to the history if ADDIT is non-zero. */
- if (!history_expansion_inhibited && history_expansion && history_expansion_p (line))
- {
- expanded = history_expand (line, &history_value);
-
- if (expanded)
- {
- if (print_changes)
- {
- if (expanded < 0)
- internal_error ("%s", history_value);
-#if defined (READLINE)
- else if (hist_verify == 0 || expanded == 2)
-#else
- else
-#endif
- fprintf (stderr, "%s\n", history_value);
- }
-
- /* If there was an error, return NULL. */
- if (expanded < 0 || expanded == 2) /* 2 == print only */
- {
-# if defined (READLINE)
- if (expanded == 2 && rl_dispatching == 0 && *history_value)
-# else
- if (expanded == 2 && *history_value)
-# endif /* !READLINE */
- maybe_add_history (history_value);
-
- free (history_value);
-
-# if defined (READLINE)
- /* New hack. We can allow the user to edit the
- failed history expansion. */
- if (history_reediting && expanded < 0 && rl_done)
- re_edit (line);
-# endif /* READLINE */
- return ((char *)NULL);
- }
-
-# if defined (READLINE)
- if (hist_verify && expanded == 1)
- {
- re_edit (history_value);
- return ((char *)NULL);
- }
-# endif
- }
-
- /* Let other expansions know that return_value can be free'ed,
- and that a line has been added to the history list. Note
- that we only add lines that have something in them. */
- expanded = 1;
- return_value = history_value;
- }
-# endif /* BANG_HISTORY */
-
- if (addit && remember_on_history && *return_value)
- maybe_add_history (return_value);
-
-#if 0
- if (expanded == 0)
- return_value = savestring (line);
-#endif
-
- return (return_value);
-}
-
-/* Return 1 if the first non-whitespace character in LINE is a `#', indicating
- * that the line is a shell comment. */
-static int
-shell_comment (line)
- char *line;
-{
- char *p;
-
- for (p = line; p && *p && whitespace (*p); p++)
- ;
- return (p && *p == '#');
-}
-
-#ifdef INCLUDE_UNUSED
-/* Remove shell comments from LINE. A `#' and anything after it is a comment.
- This isn't really useful yet, since it doesn't handle quoting. */
-static char *
-filter_comments (line)
- char *line;
-{
- char *p;
-
- for (p = line; p && *p && *p != '#'; p++)
- ;
- if (p && *p == '#')
- *p = '\0';
- return (line);
-}
-#endif
-
-/* Check LINE against what HISTCONTROL says to do. Returns 1 if the line
- should be saved; 0 if it should be discarded. */
-static int
-check_history_control (line)
- char *line;
-{
- HIST_ENTRY *temp;
- int r;
-
- if (history_control == 0)
- return 1;
-
- /* ignorespace or ignoreboth */
- if ((history_control & HC_IGNSPACE) && *line == ' ')
- return 0;
-
- /* ignoredups or ignoreboth */
- if (history_control & HC_IGNDUPS)
- {
- using_history ();
- temp = previous_history ();
-
- r = (temp == 0 || STREQ (temp->line, line) == 0);
-
- using_history ();
-
- if (r == 0)
- return r;
- }
-
- return 1;
-}
-
-/* Remove all entries matching LINE from the history list. Triggered when
- HISTCONTROL includes `erasedups'. */
-static void
-hc_erasedups (line)
- char *line;
-{
- HIST_ENTRY *temp;
- int r;
-
- using_history ();
- while (temp = previous_history ())
- {
- if (STREQ (temp->line, line))
- {
- r = where_history ();
- remove_history (r);
- }
- }
- using_history ();
-}
-
-/* Add LINE to the history list, handling possibly multi-line compound
- commands. We note whether or not we save the first line of each command
- (which is usually the entire command and history entry), and don't add
- the second and subsequent lines of a multi-line compound command if we
- didn't save the first line. We don't usually save shell comment lines in
- compound commands in the history, because they could have the effect of
- commenting out the rest of the command when the entire command is saved as
- a single history entry (when COMMAND_ORIENTED_HISTORY is enabled). If
- LITERAL_HISTORY is set, we're saving lines in the history with embedded
- newlines, so it's OK to save comment lines. We also make sure to save
- multiple-line quoted strings or other constructs. */
-void
-maybe_add_history (line)
- char *line;
-{
- hist_last_line_added = 0;
-
- /* Don't use the value of history_control to affect the second
- and subsequent lines of a multi-line command (old code did
- this only when command_oriented_history is enabled). */
- if (current_command_line_count > 1)
- {
- if (current_command_first_line_saved &&
- (literal_history || dstack.delimiter_depth != 0 || shell_comment (line) == 0))
- bash_add_history (line);
- return;
- }
-
- /* This is the first line of a (possible multi-line) command. Note whether
- or not we should save the first line and remember it. */
- current_command_first_line_saved = check_add_history (line, 0);
-}
-
-/* Just check LINE against HISTCONTROL and HISTIGNORE and add it to the
- history if it's OK. Used by `history -s' as well as maybe_add_history().
- Returns 1 if the line was saved in the history, 0 otherwise. */
-int
-check_add_history (line, force)
- char *line;
- int force;
-{
- if (check_history_control (line) && history_should_ignore (line) == 0)
- {
- /* We're committed to saving the line. If the user has requested it,
- remove other matching lines from the history. */
- if (history_control & HC_ERASEDUPS)
- hc_erasedups (line);
-
- if (force)
- {
- really_add_history (line);
- using_history ();
- }
- else
- bash_add_history (line);
- return 1;
- }
- return 0;
-}
-
-#if defined (SYSLOG_HISTORY)
-#define SYSLOG_MAXLEN 600
-
-void
-bash_syslog_history (line)
- const char *line;
-{
- char trunc[SYSLOG_MAXLEN];
-
- if (strlen(line) < SYSLOG_MAXLEN)
- syslog (SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY: PID=%d UID=%d %s", getpid(), current_user.uid, line);
- else
- {
- strncpy (trunc, line, SYSLOG_MAXLEN);
- trunc[SYSLOG_MAXLEN - 1] = '\0';
- syslog (SYSLOG_FACILITY|SYSLOG_LEVEL, "HISTORY (TRUNCATED): PID=%d UID=%d %s", getpid(), current_user.uid, trunc);
- }
-}
-#endif
-
-/* Add a line to the history list.
- The variable COMMAND_ORIENTED_HISTORY controls the style of history
- remembering; when non-zero, and LINE is not the first line of a
- complete parser construct, append LINE to the last history line instead
- of adding it as a new line. */
-void
-bash_add_history (line)
- char *line;
-{
- int add_it, offset, curlen;
- HIST_ENTRY *current, *old;
- char *chars_to_add, *new_line;
-
- add_it = 1;
- if (command_oriented_history && current_command_line_count > 1)
- {
- chars_to_add = literal_history ? "\n" : history_delimiting_chars (line);
-
- using_history ();
- current = previous_history ();
-
- if (current)
- {
- /* If the previous line ended with an escaped newline (escaped
- with backslash, but otherwise unquoted), then remove the quoted
- newline, since that is what happens when the line is parsed. */
- curlen = strlen (current->line);
-
- if (dstack.delimiter_depth == 0 && current->line[curlen - 1] == '\\' &&
- current->line[curlen - 2] != '\\')
- {
- current->line[curlen - 1] = '\0';
- curlen--;
- chars_to_add = "";
- }
-
- /* If we're not in some kind of quoted construct, the current history
- entry ends with a newline, and we're going to add a semicolon,
- don't. In some cases, it results in a syntax error (e.g., before
- a close brace), and it should not be needed. */
- if (dstack.delimiter_depth == 0 && current->line[curlen - 1] == '\n' && *chars_to_add == ';')
- chars_to_add++;
-
- new_line = (char *)xmalloc (1
- + curlen
- + strlen (line)
- + strlen (chars_to_add));
- sprintf (new_line, "%s%s%s", current->line, chars_to_add, line);
- offset = where_history ();
- old = replace_history_entry (offset, new_line, current->data);
- free (new_line);
-
- if (old)
- free_history_entry (old);
-
- add_it = 0;
- }
- }
-
- if (add_it)
- really_add_history (line);
-
-#if defined (SYSLOG_HISTORY)
- bash_syslog_history (line);
-#endif
-
- using_history ();
-}
-
-static void
-really_add_history (line)
- char *line;
-{
- hist_last_line_added = 1;
- hist_last_line_pushed = 0;
- add_history (line);
- history_lines_this_session++;
-}
-
-int
-history_number ()
-{
- using_history ();
- return (remember_on_history ? history_base + where_history () : 1);
-}
-
-static int
-should_expand (s)
- char *s;
-{
- char *p;
-
- for (p = s; p && *p; p++)
- {
- if (*p == '\\')
- p++;
- else if (*p == '&')
- return 1;
- }
- return 0;
-}
-
-static int
-histignore_item_func (ign)
- struct ign *ign;
-{
- if (should_expand (ign->val))
- ign->flags |= HIGN_EXPAND;
- return (0);
-}
-
-void
-setup_history_ignore (varname)
- char *varname;
-{
- setup_ignore_patterns (&histignore);
-}
-
-static HIST_ENTRY *
-last_history_entry ()
-{
- HIST_ENTRY *he;
-
- using_history ();
- he = previous_history ();
- using_history ();
- return he;
-}
-
-char *
-last_history_line ()
-{
- HIST_ENTRY *he;
-
- he = last_history_entry ();
- if (he == 0)
- return ((char *)NULL);
- return he->line;
-}
-
-static char *
-expand_histignore_pattern (pat)
- char *pat;
-{
- HIST_ENTRY *phe;
- char *ret;
-
- phe = last_history_entry ();
-
- if (phe == (HIST_ENTRY *)0)
- return (savestring (pat));
-
- ret = strcreplace (pat, '&', phe->line, 1);
-
- return ret;
-}
-
-/* Return 1 if we should not put LINE into the history according to the
- patterns in HISTIGNORE. */
-static int
-history_should_ignore (line)
- char *line;
-{
- register int i, match;
- char *npat;
-
- if (histignore.num_ignores == 0)
- return 0;
-
- for (i = match = 0; i < histignore.num_ignores; i++)
- {
- if (histignore.ignores[i].flags & HIGN_EXPAND)
- npat = expand_histignore_pattern (histignore.ignores[i].val);
- else
- npat = histignore.ignores[i].val;
-
- match = strmatch (npat, line, FNMATCH_EXTFLAG) != FNM_NOMATCH;
-
- if (histignore.ignores[i].flags & HIGN_EXPAND)
- free (npat);
-
- if (match)
- break;
- }
-
- return match;
-}
-#endif /* HISTORY */
+++ /dev/null
-/* bashline.c -- Bash's interface to the readline library. */
-
-/* Copyright (C) 1987-2011 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#if defined (READLINE)
-
-#include "bashtypes.h"
-#include "posixstat.h"
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#if defined (HAVE_GRP_H)
-# include <grp.h>
-#endif
-
-#if defined (HAVE_NETDB_H)
-# include <netdb.h>
-#endif
-
-#include <stdio.h>
-#include "chartypes.h"
-#include "bashansi.h"
-#include "bashintl.h"
-
-#include "shell.h"
-#include "input.h"
-#include "builtins.h"
-#include "bashhist.h"
-#include "bashline.h"
-#include "execute_cmd.h"
-#include "findcmd.h"
-#include "pathexp.h"
-#include "shmbutil.h"
-
-#include "builtins/common.h"
-
-#include <readline/rlconf.h>
-#include <readline/readline.h>
-#include <readline/history.h>
-
-#include <glob/glob.h>
-
-#if defined (ALIAS)
-# include "alias.h"
-#endif
-
-#if defined (PROGRAMMABLE_COMPLETION)
-# include "pcomplete.h"
-#endif
-
-/* These should agree with the defines for emacs_mode and vi_mode in
- rldefs.h, even though that's not a public readline header file. */
-#ifndef EMACS_EDITING_MODE
-# define NO_EDITING_MODE -1
-# define EMACS_EDITING_MODE 1
-# define VI_EDITING_MODE 0
-#endif
-
-#define RL_BOOLEAN_VARIABLE_VALUE(s) ((s)[0] == 'o' && (s)[1] == 'n' && (s)[2] == '\0')
-
-#if defined (BRACE_COMPLETION)
-extern int bash_brace_completion __P((int, int));
-#endif /* BRACE_COMPLETION */
-
-/* To avoid including curses.h/term.h/termcap.h and that whole mess. */
-extern int tputs __P((const char *string, int nlines, int (*outx)(int)));
-
-/* Forward declarations */
-
-/* Functions bound to keys in Readline for Bash users. */
-static int shell_expand_line __P((int, int));
-static int display_shell_version __P((int, int));
-static int operate_and_get_next __P((int, int));
-
-static int bash_ignore_filenames __P((char **));
-static int bash_ignore_everything __P((char **));
-
-#if defined (BANG_HISTORY)
-static char *history_expand_line_internal __P((char *));
-static int history_expand_line __P((int, int));
-static int tcsh_magic_space __P((int, int));
-#endif /* BANG_HISTORY */
-#ifdef ALIAS
-static int alias_expand_line __P((int, int));
-#endif
-#if defined (BANG_HISTORY) && defined (ALIAS)
-static int history_and_alias_expand_line __P((int, int));
-#endif
-
-static int bash_forward_shellword __P((int, int));
-static int bash_backward_shellword __P((int, int));
-static int bash_kill_shellword __P((int, int));
-static int bash_backward_kill_shellword __P((int, int));
-
-/* Helper functions for Readline. */
-static char *restore_tilde __P((char *, char *));
-
-static char *bash_filename_rewrite_hook __P((char *, int));
-static void bash_directory_expansion __P((char **));
-static int bash_directory_completion_hook __P((char **));
-static int filename_completion_ignore __P((char **));
-static int bash_push_line __P((void));
-
-static void cleanup_expansion_error __P((void));
-static void maybe_make_readline_line __P((char *));
-static void set_up_new_line __P((char *));
-
-static int check_redir __P((int));
-static char **attempt_shell_completion __P((const char *, int, int));
-static char *variable_completion_function __P((const char *, int));
-static char *hostname_completion_function __P((const char *, int));
-static char *command_subst_completion_function __P((const char *, int));
-
-static void build_history_completion_array __P((void));
-static char *history_completion_generator __P((const char *, int));
-static int dynamic_complete_history __P((int, int));
-static int bash_dabbrev_expand __P((int, int));
-
-static void initialize_hostname_list __P((void));
-static void add_host_name __P((char *));
-static void snarf_hosts_from_file __P((char *));
-static char **hostnames_matching __P((char *));
-
-static void _ignore_completion_names __P((char **, sh_ignore_func_t *));
-static int name_is_acceptable __P((const char *));
-static int test_for_directory __P((const char *));
-static int return_zero __P((const char *));
-
-static char *bash_dequote_filename __P((char *, int));
-static char *quote_word_break_chars __P((char *));
-static char *bash_quote_filename __P((char *, int, char *));
-
-static int putx __P((int));
-static int bash_execute_unix_command __P((int, int));
-static void init_unix_command_map __P((void));
-static int isolate_sequence __P((char *, int, int, int *));
-
-static int set_saved_history __P((void));
-
-#if defined (ALIAS)
-static int posix_edit_macros __P((int, int));
-#endif
-
-static int bash_event_hook __P((void));
-
-#if defined (PROGRAMMABLE_COMPLETION)
-static int find_cmd_start __P((int));
-static int find_cmd_end __P((int));
-static char *find_cmd_name __P((int, int *, int *));
-static char *prog_complete_return __P((const char *, int));
-
-static char **prog_complete_matches;
-#endif
-
-/* Variables used here but defined in other files. */
-#if defined (BANG_HISTORY)
-extern int hist_verify;
-#endif
-
-extern int current_command_line_count, saved_command_line_count;
-extern int last_command_exit_value;
-extern int array_needs_making;
-extern int posixly_correct, no_symbolic_links;
-extern char *current_prompt_string, *ps1_prompt;
-extern STRING_INT_ALIST word_token_alist[];
-extern sh_builtin_func_t *last_shell_builtin, *this_shell_builtin;
-
-/* SPECIFIC_COMPLETION_FUNCTIONS specifies that we have individual
- completion functions which indicate what type of completion should be
- done (at or before point) that can be bound to key sequences with
- the readline library. */
-#define SPECIFIC_COMPLETION_FUNCTIONS
-
-#if defined (SPECIFIC_COMPLETION_FUNCTIONS)
-static int bash_specific_completion __P((int, rl_compentry_func_t *));
-
-static int bash_complete_filename_internal __P((int));
-static int bash_complete_username_internal __P((int));
-static int bash_complete_hostname_internal __P((int));
-static int bash_complete_variable_internal __P((int));
-static int bash_complete_command_internal __P((int));
-
-static int bash_complete_filename __P((int, int));
-static int bash_possible_filename_completions __P((int, int));
-static int bash_complete_username __P((int, int));
-static int bash_possible_username_completions __P((int, int));
-static int bash_complete_hostname __P((int, int));
-static int bash_possible_hostname_completions __P((int, int));
-static int bash_complete_variable __P((int, int));
-static int bash_possible_variable_completions __P((int, int));
-static int bash_complete_command __P((int, int));
-static int bash_possible_command_completions __P((int, int));
-
-static char *glob_complete_word __P((const char *, int));
-static int bash_glob_completion_internal __P((int));
-static int bash_glob_complete_word __P((int, int));
-static int bash_glob_expand_word __P((int, int));
-static int bash_glob_list_expansions __P((int, int));
-
-#endif /* SPECIFIC_COMPLETION_FUNCTIONS */
-
-static int edit_and_execute_command __P((int, int, int, char *));
-#if defined (VI_MODE)
-static int vi_edit_and_execute_command __P((int, int));
-static int bash_vi_complete __P((int, int));
-#endif
-static int emacs_edit_and_execute_command __P((int, int));
-
-/* Non-zero once initalize_readline () has been called. */
-int bash_readline_initialized = 0;
-
-/* If non-zero, we do hostname completion, breaking words at `@' and
- trying to complete the stuff after the `@' from our own internal
- host list. */
-int perform_hostname_completion = 1;
-
-/* If non-zero, we don't do command completion on an empty line. */
-int no_empty_command_completion;
-
-/* Set FORCE_FIGNORE if you want to honor FIGNORE even if it ignores the
- only possible matches. Set to 0 if you want to match filenames if they
- are the only possible matches, even if FIGNORE says to. */
-int force_fignore = 1;
-
-/* Perform spelling correction on directory names during word completion */
-int dircomplete_spelling = 0;
-
-static char *bash_completer_word_break_characters = " \t\n\"'@><=;|&(:";
-static char *bash_nohostname_word_break_characters = " \t\n\"'><=;|&(:";
-/* )) */
-
-static const char *default_filename_quote_characters = " \t\n\\\"'@<>=;|&()#$`?*[!:{~"; /*}*/
-static char *custom_filename_quote_characters = 0;
-
-static rl_hook_func_t *old_rl_startup_hook = (rl_hook_func_t *)NULL;
-
-static int dot_in_path = 0;
-
-/* Set to non-zero when dabbrev-expand is running */
-static int dabbrev_expand_active = 0;
-
-/* What kind of quoting is performed by bash_quote_filename:
- COMPLETE_DQUOTE = double-quoting the filename
- COMPLETE_SQUOTE = single_quoting the filename
- COMPLETE_BSQUOTE = backslash-quoting special chars in the filename
-*/
-#define COMPLETE_DQUOTE 1
-#define COMPLETE_SQUOTE 2
-#define COMPLETE_BSQUOTE 3
-static int completion_quoting_style = COMPLETE_BSQUOTE;
-
-/* Flag values for the final argument to bash_default_completion */
-#define DEFCOMP_CMDPOS 1
-
-/* Change the readline VI-mode keymaps into or out of Posix.2 compliance.
- Called when the shell is put into or out of `posix' mode. */
-void
-posix_readline_initialize (on_or_off)
- int on_or_off;
-{
- if (on_or_off)
- rl_variable_bind ("comment-begin", "#");
-#if defined (VI_MODE)
- rl_bind_key_in_map (CTRL ('I'), on_or_off ? rl_insert : rl_complete, vi_insertion_keymap);
-#endif
-}
-
-void
-reset_completer_word_break_chars ()
-{
- rl_completer_word_break_characters = perform_hostname_completion ? savestring (bash_completer_word_break_characters) : savestring (bash_nohostname_word_break_characters);
-}
-
-/* When this function returns, rl_completer_word_break_characters points to
- dynamically allocated memory. */
-int
-enable_hostname_completion (on_or_off)
- int on_or_off;
-{
- int old_value;
- char *at, *nv, *nval;
-
- old_value = perform_hostname_completion;
-
- if (on_or_off)
- {
- perform_hostname_completion = 1;
- rl_special_prefixes = "$@";
- }
- else
- {
- perform_hostname_completion = 0;
- rl_special_prefixes = "$";
- }
-
- /* Now we need to figure out how to appropriately modify and assign
- rl_completer_word_break_characters depending on whether we want
- hostname completion on or off. */
-
- /* If this is the first time this has been called
- (bash_readline_initialized == 0), use the sames values as before, but
- allocate new memory for rl_completer_word_break_characters. */
-
- if (bash_readline_initialized == 0 &&
- (rl_completer_word_break_characters == 0 ||
- rl_completer_word_break_characters == rl_basic_word_break_characters))
- {
- if (on_or_off)
- rl_completer_word_break_characters = savestring (bash_completer_word_break_characters);
- else
- rl_completer_word_break_characters = savestring (bash_nohostname_word_break_characters);
- }
- else
- {
- /* See if we have anything to do. */
- at = strchr (rl_completer_word_break_characters, '@');
- if ((at == 0 && on_or_off == 0) || (at != 0 && on_or_off != 0))
- return old_value;
-
- /* We have something to do. Do it. */
- nval = (char *)xmalloc (strlen (rl_completer_word_break_characters) + 1 + on_or_off);
-
- if (on_or_off == 0)
- {
- /* Turn it off -- just remove `@' from word break chars. We want
- to remove all occurrences of `@' from the char list, so we loop
- rather than just copy the rest of the list over AT. */
- for (nv = nval, at = rl_completer_word_break_characters; *at; )
- if (*at != '@')
- *nv++ = *at++;
- else
- at++;
- *nv = '\0';
- }
- else
- {
- nval[0] = '@';
- strcpy (nval + 1, rl_completer_word_break_characters);
- }
-
- free (rl_completer_word_break_characters);
- rl_completer_word_break_characters = nval;
- }
-
- return (old_value);
-}
-
-/* Called once from parse.y if we are going to use readline. */
-void
-initialize_readline ()
-{
- rl_command_func_t *func;
- char kseq[2];
-
- if (bash_readline_initialized)
- return;
-
- rl_terminal_name = get_string_value ("TERM");
- rl_instream = stdin;
- rl_outstream = stderr;
-
- /* Allow conditional parsing of the ~/.inputrc file. */
- rl_readline_name = "Bash";
-
- /* Add bindable names before calling rl_initialize so they may be
- referenced in the various inputrc files. */
- rl_add_defun ("shell-expand-line", shell_expand_line, -1);
-#ifdef BANG_HISTORY
- rl_add_defun ("history-expand-line", history_expand_line, -1);
- rl_add_defun ("magic-space", tcsh_magic_space, -1);
-#endif
-
- rl_add_defun ("shell-forward-word", bash_forward_shellword, -1);
- rl_add_defun ("shell-backward-word", bash_backward_shellword, -1);
- rl_add_defun ("shell-kill-word", bash_kill_shellword, -1);
- rl_add_defun ("shell-backward-kill-word", bash_backward_kill_shellword, -1);
-
-#ifdef ALIAS
- rl_add_defun ("alias-expand-line", alias_expand_line, -1);
-# ifdef BANG_HISTORY
- rl_add_defun ("history-and-alias-expand-line", history_and_alias_expand_line, -1);
-# endif
-#endif
-
- /* Backwards compatibility. */
- rl_add_defun ("insert-last-argument", rl_yank_last_arg, -1);
-
- rl_add_defun ("operate-and-get-next", operate_and_get_next, -1);
- rl_add_defun ("display-shell-version", display_shell_version, -1);
- rl_add_defun ("edit-and-execute-command", emacs_edit_and_execute_command, -1);
-
-#if defined (BRACE_COMPLETION)
- rl_add_defun ("complete-into-braces", bash_brace_completion, -1);
-#endif
-
-#if defined (SPECIFIC_COMPLETION_FUNCTIONS)
- rl_add_defun ("complete-filename", bash_complete_filename, -1);
- rl_add_defun ("possible-filename-completions", bash_possible_filename_completions, -1);
- rl_add_defun ("complete-username", bash_complete_username, -1);
- rl_add_defun ("possible-username-completions", bash_possible_username_completions, -1);
- rl_add_defun ("complete-hostname", bash_complete_hostname, -1);
- rl_add_defun ("possible-hostname-completions", bash_possible_hostname_completions, -1);
- rl_add_defun ("complete-variable", bash_complete_variable, -1);
- rl_add_defun ("possible-variable-completions", bash_possible_variable_completions, -1);
- rl_add_defun ("complete-command", bash_complete_command, -1);
- rl_add_defun ("possible-command-completions", bash_possible_command_completions, -1);
- rl_add_defun ("glob-complete-word", bash_glob_complete_word, -1);
- rl_add_defun ("glob-expand-word", bash_glob_expand_word, -1);
- rl_add_defun ("glob-list-expansions", bash_glob_list_expansions, -1);
-#endif
-
- rl_add_defun ("dynamic-complete-history", dynamic_complete_history, -1);
- rl_add_defun ("dabbrev-expand", bash_dabbrev_expand, -1);
-
- /* Bind defaults before binding our custom shell keybindings. */
- if (RL_ISSTATE(RL_STATE_INITIALIZED) == 0)
- rl_initialize ();
-
- /* Bind up our special shell functions. */
- rl_bind_key_if_unbound_in_map (CTRL('E'), shell_expand_line, emacs_meta_keymap);
-
-#ifdef BANG_HISTORY
- rl_bind_key_if_unbound_in_map ('^', history_expand_line, emacs_meta_keymap);
-#endif
-
- rl_bind_key_if_unbound_in_map (CTRL ('O'), operate_and_get_next, emacs_standard_keymap);
- rl_bind_key_if_unbound_in_map (CTRL ('V'), display_shell_version, emacs_ctlx_keymap);
-
- /* In Bash, the user can switch editing modes with "set -o [vi emacs]",
- so it is not necessary to allow C-M-j for context switching. Turn
- off this occasionally confusing behaviour. */
- kseq[0] = CTRL('J');
- kseq[1] = '\0';
- func = rl_function_of_keyseq (kseq, emacs_meta_keymap, (int *)NULL);
- if (func == rl_vi_editing_mode)
- rl_unbind_key_in_map (CTRL('J'), emacs_meta_keymap);
- kseq[0] = CTRL('M');
- func = rl_function_of_keyseq (kseq, emacs_meta_keymap, (int *)NULL);
- if (func == rl_vi_editing_mode)
- rl_unbind_key_in_map (CTRL('M'), emacs_meta_keymap);
-#if defined (VI_MODE)
- rl_unbind_key_in_map (CTRL('E'), vi_movement_keymap);
-#endif
-
-#if defined (BRACE_COMPLETION)
- rl_bind_key_if_unbound_in_map ('{', bash_brace_completion, emacs_meta_keymap); /*}*/
-#endif /* BRACE_COMPLETION */
-
-#if defined (SPECIFIC_COMPLETION_FUNCTIONS)
- rl_bind_key_if_unbound_in_map ('/', bash_complete_filename, emacs_meta_keymap);
- rl_bind_key_if_unbound_in_map ('/', bash_possible_filename_completions, emacs_ctlx_keymap);
-
- /* Have to jump through hoops here because there is a default binding for
- M-~ (rl_tilde_expand) */
- kseq[0] = '~';
- kseq[1] = '\0';
- func = rl_function_of_keyseq (kseq, emacs_meta_keymap, (int *)NULL);
- if (func == 0 || func == rl_tilde_expand)
- rl_bind_keyseq_in_map (kseq, bash_complete_username, emacs_meta_keymap);
-
- rl_bind_key_if_unbound_in_map ('~', bash_possible_username_completions, emacs_ctlx_keymap);
-
- rl_bind_key_if_unbound_in_map ('@', bash_complete_hostname, emacs_meta_keymap);
- rl_bind_key_if_unbound_in_map ('@', bash_possible_hostname_completions, emacs_ctlx_keymap);
-
- rl_bind_key_if_unbound_in_map ('$', bash_complete_variable, emacs_meta_keymap);
- rl_bind_key_if_unbound_in_map ('$', bash_possible_variable_completions, emacs_ctlx_keymap);
-
- rl_bind_key_if_unbound_in_map ('!', bash_complete_command, emacs_meta_keymap);
- rl_bind_key_if_unbound_in_map ('!', bash_possible_command_completions, emacs_ctlx_keymap);
-
- rl_bind_key_if_unbound_in_map ('g', bash_glob_complete_word, emacs_meta_keymap);
- rl_bind_key_if_unbound_in_map ('*', bash_glob_expand_word, emacs_ctlx_keymap);
- rl_bind_key_if_unbound_in_map ('g', bash_glob_list_expansions, emacs_ctlx_keymap);
-
-#endif /* SPECIFIC_COMPLETION_FUNCTIONS */
-
- kseq[0] = TAB;
- kseq[1] = '\0';
- func = rl_function_of_keyseq (kseq, emacs_meta_keymap, (int *)NULL);
- if (func == 0 || func == rl_tab_insert)
- rl_bind_key_in_map (TAB, dynamic_complete_history, emacs_meta_keymap);
-
- /* Tell the completer that we want a crack first. */
- rl_attempted_completion_function = attempt_shell_completion;
-
- /* Tell the completer that we might want to follow symbolic links or
- do other expansion on directory names. */
- rl_directory_rewrite_hook = bash_directory_completion_hook;
-
- rl_filename_rewrite_hook = bash_filename_rewrite_hook;
-
- /* Tell the filename completer we want a chance to ignore some names. */
- rl_ignore_some_completions_function = filename_completion_ignore;
-
- /* Bind C-xC-e to invoke emacs and run result as commands. */
- rl_bind_key_if_unbound_in_map (CTRL ('E'), emacs_edit_and_execute_command, emacs_ctlx_keymap);
-#if defined (VI_MODE)
- rl_bind_key_if_unbound_in_map ('v', vi_edit_and_execute_command, vi_movement_keymap);
-# if defined (ALIAS)
- rl_bind_key_if_unbound_in_map ('@', posix_edit_macros, vi_movement_keymap);
-# endif
-
- rl_bind_key_in_map ('\\', bash_vi_complete, vi_movement_keymap);
- rl_bind_key_in_map ('*', bash_vi_complete, vi_movement_keymap);
- rl_bind_key_in_map ('=', bash_vi_complete, vi_movement_keymap);
-#endif
-
- rl_completer_quote_characters = "'\"";
-
- /* This sets rl_completer_word_break_characters and rl_special_prefixes
- to the appropriate values, depending on whether or not hostname
- completion is enabled. */
- enable_hostname_completion (perform_hostname_completion);
-
- /* characters that need to be quoted when appearing in filenames. */
- rl_filename_quote_characters = default_filename_quote_characters;
-
- rl_filename_quoting_function = bash_quote_filename;
- rl_filename_dequoting_function = bash_dequote_filename;
- rl_char_is_quoted_p = char_is_quoted;
-
-#if 0
- /* This is superfluous and makes it impossible to use tab completion in
- vi mode even when explicitly binding it in ~/.inputrc. sv_strict_posix()
- should already have called posix_readline_initialize() when
- posixly_correct was set. */
- if (posixly_correct)
- posix_readline_initialize (1);
-#endif
-
- bash_readline_initialized = 1;
-}
-
-void
-bashline_reinitialize ()
-{
- bash_readline_initialized = 0;
-}
-
-void
-bashline_set_event_hook ()
-{
- rl_event_hook = bash_event_hook;
-}
-
-void
-bashline_reset_event_hook ()
-{
- rl_event_hook = 0;
-}
-
-/* On Sun systems at least, rl_attempted_completion_function can end up
- getting set to NULL, and rl_completion_entry_function set to do command
- word completion if Bash is interrupted while trying to complete a command
- word. This just resets all the completion functions to the right thing.
- It's called from throw_to_top_level(). */
-void
-bashline_reset ()
-{
- tilde_initialize ();
- rl_attempted_completion_function = attempt_shell_completion;
- rl_completion_entry_function = NULL;
- rl_directory_rewrite_hook = bash_directory_completion_hook;
- rl_ignore_some_completions_function = filename_completion_ignore;
- rl_filename_quote_characters = default_filename_quote_characters;
-}
-
-/* Contains the line to push into readline. */
-static char *push_to_readline = (char *)NULL;
-
-/* Push the contents of push_to_readline into the
- readline buffer. */
-static int
-bash_push_line ()
-{
- if (push_to_readline)
- {
- rl_insert_text (push_to_readline);
- free (push_to_readline);
- push_to_readline = (char *)NULL;
- rl_startup_hook = old_rl_startup_hook;
- }
- return 0;
-}
-
-/* Call this to set the initial text for the next line to read
- from readline. */
-int
-bash_re_edit (line)
- char *line;
-{
- FREE (push_to_readline);
-
- push_to_readline = savestring (line);
- old_rl_startup_hook = rl_startup_hook;
- rl_startup_hook = bash_push_line;
-
- return (0);
-}
-
-static int
-display_shell_version (count, c)
- int count, c;
-{
- rl_crlf ();
- show_shell_version (0);
- putc ('\r', rl_outstream);
- fflush (rl_outstream);
- rl_on_new_line ();
- rl_redisplay ();
- return 0;
-}
-
-/* **************************************************************** */
-/* */
-/* Readline Stuff */
-/* */
-/* **************************************************************** */
-
-/* If the user requests hostname completion, then simply build a list
- of hosts, and complete from that forever more, or at least until
- HOSTFILE is unset. */
-
-/* THIS SHOULD BE A STRINGLIST. */
-/* The kept list of hostnames. */
-static char **hostname_list = (char **)NULL;
-
-/* The physical size of the above list. */
-static int hostname_list_size;
-
-/* The number of hostnames in the above list. */
-static int hostname_list_length;
-
-/* Whether or not HOSTNAME_LIST has been initialized. */
-int hostname_list_initialized = 0;
-
-/* Initialize the hostname completion table. */
-static void
-initialize_hostname_list ()
-{
- char *temp;
-
- temp = get_string_value ("HOSTFILE");
- if (temp == 0)
- temp = get_string_value ("hostname_completion_file");
- if (temp == 0)
- temp = DEFAULT_HOSTS_FILE;
-
- snarf_hosts_from_file (temp);
-
- if (hostname_list)
- hostname_list_initialized++;
-}
-
-/* Add NAME to the list of hosts. */
-static void
-add_host_name (name)
- char *name;
-{
- if (hostname_list_length + 2 > hostname_list_size)
- {
- hostname_list_size = (hostname_list_size + 32) - (hostname_list_size % 32);
- hostname_list = strvec_resize (hostname_list, hostname_list_size);
- }
-
- hostname_list[hostname_list_length++] = savestring (name);
- hostname_list[hostname_list_length] = (char *)NULL;
-}
-
-#define cr_whitespace(c) ((c) == '\r' || (c) == '\n' || whitespace(c))
-
-static void
-snarf_hosts_from_file (filename)
- char *filename;
-{
- FILE *file;
- char *temp, buffer[256], name[256];
- register int i, start;
-
- file = fopen (filename, "r");
- if (file == 0)
- return;
-
- while (temp = fgets (buffer, 255, file))
- {
- /* Skip to first character. */
- for (i = 0; buffer[i] && cr_whitespace (buffer[i]); i++)
- ;
-
- /* If comment or blank line, ignore. */
- if (buffer[i] == '\0' || buffer[i] == '#')
- continue;
-
- /* If `preprocessor' directive, do the include. */
- if (strncmp (buffer + i, "$include ", 9) == 0)
- {
- char *incfile, *t;
-
- /* Find start of filename. */
- for (incfile = buffer + i + 9; *incfile && whitespace (*incfile); incfile++)
- ;
-
- /* Find end of filename. */
- for (t = incfile; *t && cr_whitespace (*t) == 0; t++)
- ;
-
- *t = '\0';
-
- snarf_hosts_from_file (incfile);
- continue;
- }
-
- /* Skip internet address if present. */
- if (DIGIT (buffer[i]))
- for (; buffer[i] && cr_whitespace (buffer[i]) == 0; i++);
-
- /* Gobble up names. Each name is separated with whitespace. */
- while (buffer[i])
- {
- for (; cr_whitespace (buffer[i]); i++)
- ;
- if (buffer[i] == '\0' || buffer[i] == '#')
- break;
-
- /* Isolate the current word. */
- for (start = i; buffer[i] && cr_whitespace (buffer[i]) == 0; i++)
- ;
- if (i == start)
- continue;
- strncpy (name, buffer + start, i - start);
- name[i - start] = '\0';
- add_host_name (name);
- }
- }
- fclose (file);
-}
-
-/* Return the hostname list. */
-char **
-get_hostname_list ()
-{
- if (hostname_list_initialized == 0)
- initialize_hostname_list ();
- return (hostname_list);
-}
-
-void
-clear_hostname_list ()
-{
- register int i;
-
- if (hostname_list_initialized == 0)
- return;
- for (i = 0; i < hostname_list_length; i++)
- free (hostname_list[i]);
- hostname_list_length = hostname_list_initialized = 0;
-}
-
-/* Return a NULL terminated list of hostnames which begin with TEXT.
- Initialize the hostname list the first time if neccessary.
- The array is malloc ()'ed, but not the individual strings. */
-static char **
-hostnames_matching (text)
- char *text;
-{
- register int i, len, nmatch, rsize;
- char **result;
-
- if (hostname_list_initialized == 0)
- initialize_hostname_list ();
-
- if (hostname_list_initialized == 0)
- return ((char **)NULL);
-
- /* Special case. If TEXT consists of nothing, then the whole list is
- what is desired. */
- if (*text == '\0')
- {
- result = strvec_create (1 + hostname_list_length);
- for (i = 0; i < hostname_list_length; i++)
- result[i] = hostname_list[i];
- result[i] = (char *)NULL;
- return (result);
- }
-
- /* Scan until found, or failure. */
- len = strlen (text);
- result = (char **)NULL;
- for (i = nmatch = rsize = 0; i < hostname_list_length; i++)
- {
- if (STREQN (text, hostname_list[i], len) == 0)
- continue;
-
- /* OK, it matches. Add it to the list. */
- if (nmatch >= (rsize - 1))
- {
- rsize = (rsize + 16) - (rsize % 16);
- result = strvec_resize (result, rsize);
- }
-
- result[nmatch++] = hostname_list[i];
- }
- if (nmatch)
- result[nmatch] = (char *)NULL;
- return (result);
-}
-
-/* The equivalent of the Korn shell C-o operate-and-get-next-history-line
- editing command. */
-static int saved_history_line_to_use = -1;
-
-static int
-set_saved_history ()
-{
- if (saved_history_line_to_use >= 0)
- rl_get_previous_history (history_length - saved_history_line_to_use, 0);
- saved_history_line_to_use = -1;
- rl_startup_hook = old_rl_startup_hook;
- return (0);
-}
-
-static int
-operate_and_get_next (count, c)
- int count, c;
-{
- int where;
-
- /* Accept the current line. */
- rl_newline (1, c);
-
- /* Find the current line, and find the next line to use. */
- where = where_history ();
-
- if ((history_is_stifled () && (history_length >= history_max_entries)) ||
- (where >= history_length - 1))
- saved_history_line_to_use = where;
- else
- saved_history_line_to_use = where + 1;
-
- old_rl_startup_hook = rl_startup_hook;
- rl_startup_hook = set_saved_history;
-
- return 0;
-}
-
-/* This vi mode command causes VI_EDIT_COMMAND to be run on the current
- command being entered (if no explicit argument is given), otherwise on
- a command from the history file. */
-
-#define VI_EDIT_COMMAND "fc -e \"${VISUAL:-${EDITOR:-vi}}\""
-#define EMACS_EDIT_COMMAND "fc -e \"${VISUAL:-${EDITOR:-emacs}}\""
-#define POSIX_VI_EDIT_COMMAND "fc -e vi"
-
-static int
-edit_and_execute_command (count, c, editing_mode, edit_command)
- int count, c, editing_mode;
- char *edit_command;
-{
- char *command, *metaval;
- int r, rrs, metaflag;
- sh_parser_state_t ps;
-
- rrs = rl_readline_state;
- saved_command_line_count = current_command_line_count;
-
- /* Accept the current line. */
- rl_newline (1, c);
-
- if (rl_explicit_arg)
- {
- command = (char *)xmalloc (strlen (edit_command) + 8);
- sprintf (command, "%s %d", edit_command, count);
- }
- else
- {
- /* Take the command we were just editing, add it to the history file,
- then call fc to operate on it. We have to add a dummy command to
- the end of the history because fc ignores the last command (assumes
- it's supposed to deal with the command before the `fc'). */
- /* This breaks down when using command-oriented history and are not
- finished with the command, so we should not ignore the last command */
- using_history ();
- bash_add_history (rl_line_buffer);
- bash_add_history ("");
- history_lines_this_session++;
- using_history ();
- command = savestring (edit_command);
- }
-
- metaval = rl_variable_value ("input-meta");
- metaflag = RL_BOOLEAN_VARIABLE_VALUE (metaval);
-
- /* Now, POSIX.1-2001 and SUSv3 say that the commands executed from the
- temporary file should be placed into the history. We don't do that
- yet. */
- if (rl_deprep_term_function)
- (*rl_deprep_term_function) ();
- save_parser_state (&ps);
- r = parse_and_execute (command, (editing_mode == VI_EDITING_MODE) ? "v" : "C-xC-e", SEVAL_NOHIST);
- restore_parser_state (&ps);
- if (rl_prep_term_function)
- (*rl_prep_term_function) (metaflag);
-
- current_command_line_count = saved_command_line_count;
-
- /* Now erase the contents of the current line and undo the effects of the
- rl_accept_line() above. We don't even want to make the text we just
- executed available for undoing. */
- rl_line_buffer[0] = '\0'; /* XXX */
- rl_point = rl_end = 0;
- rl_done = 0;
- rl_readline_state = rrs;
-
- rl_forced_update_display ();
-
- return r;
-}
-
-#if defined (VI_MODE)
-static int
-vi_edit_and_execute_command (count, c)
- int count, c;
-{
- if (posixly_correct)
- return (edit_and_execute_command (count, c, VI_EDITING_MODE, POSIX_VI_EDIT_COMMAND));
- else
- return (edit_and_execute_command (count, c, VI_EDITING_MODE, VI_EDIT_COMMAND));
-}
-#endif /* VI_MODE */
-
-static int
-emacs_edit_and_execute_command (count, c)
- int count, c;
-{
- return (edit_and_execute_command (count, c, EMACS_EDITING_MODE, EMACS_EDIT_COMMAND));
-}
-
-#if defined (ALIAS)
-static int
-posix_edit_macros (count, key)
- int count, key;
-{
- int c;
- char alias_name[3], *alias_value, *macro;
-
- c = rl_read_key ();
- alias_name[0] = '_';
- alias_name[1] = c;
- alias_name[2] = '\0';
-
- alias_value = get_alias_value (alias_name);
- if (alias_value && *alias_value)
- {
- macro = savestring (alias_value);
- rl_push_macro_input (macro);
- }
- return 0;
-}
-#endif
-
-/* Bindable commands that move `shell-words': that is, sequences of
- non-unquoted-metacharacters. */
-
-#define WORDDELIM(c) (shellmeta(c) || shellblank(c))
-
-static int
-bash_forward_shellword (count, key)
- int count, key;
-{
- size_t slen;
- int sindex, c, p;
- DECLARE_MBSTATE;
-
- if (count < 0)
- return (bash_backward_shellword (-count, key));
-
- /* The tricky part of this is deciding whether or not the first character
- we're on is an unquoted metacharacter. Not completely handled yet. */
- /* XXX - need to test this stuff with backslash-escaped shell
- metacharacters and unclosed single- and double-quoted strings. */
-
- p = rl_point;
- slen = rl_end;
-
- while (count)
- {
- if (p == rl_end)
- {
- rl_point = rl_end;
- return 0;
- }
-
- /* Are we in a quoted string? If we are, move to the end of the quoted
- string and continue the outer loop. We only want quoted strings, not
- backslash-escaped characters, but char_is_quoted doesn't
- differentiate. */
- if (char_is_quoted (rl_line_buffer, p) && p > 0 && rl_line_buffer[p-1] != '\\')
- {
- do
- ADVANCE_CHAR (rl_line_buffer, slen, p);
- while (p < rl_end && char_is_quoted (rl_line_buffer, p));
- count--;
- continue;
- }
-
- /* Rest of code assumes we are not in a quoted string. */
- /* Move forward until we hit a non-metacharacter. */
- while (p < rl_end && (c = rl_line_buffer[p]) && WORDDELIM (c))
- {
- switch (c)
- {
- default:
- ADVANCE_CHAR (rl_line_buffer, slen, p);
- continue; /* straight back to loop, don't increment p */
- case '\\':
- if (p < rl_end && rl_line_buffer[p])
- ADVANCE_CHAR (rl_line_buffer, slen, p);
- break;
- case '\'':
- p = skip_to_delim (rl_line_buffer, ++p, "'", SD_NOJMP);
- break;
- case '"':
- p = skip_to_delim (rl_line_buffer, ++p, "\"", SD_NOJMP);
- break;
- }
-
- if (p < rl_end)
- p++;
- }
-
- if (rl_line_buffer[p] == 0 || p == rl_end)
- {
- rl_point = rl_end;
- rl_ding ();
- return 0;
- }
-
- /* Now move forward until we hit a non-quoted metacharacter or EOL */
- while (p < rl_end && (c = rl_line_buffer[p]) && WORDDELIM (c) == 0)
- {
- switch (c)
- {
- default:
- ADVANCE_CHAR (rl_line_buffer, slen, p);
- continue; /* straight back to loop, don't increment p */
- case '\\':
- if (p < rl_end && rl_line_buffer[p])
- ADVANCE_CHAR (rl_line_buffer, slen, p);
- break;
- case '\'':
- p = skip_to_delim (rl_line_buffer, ++p, "'", SD_NOJMP);
- break;
- case '"':
- p = skip_to_delim (rl_line_buffer, ++p, "\"", SD_NOJMP);
- break;
- }
-
- if (p < rl_end)
- p++;
- }
-
- if (p == rl_end || rl_line_buffer[p] == 0)
- {
- rl_point = rl_end;
- return (0);
- }
-
- count--;
- }
-
- rl_point = p;
- return (0);
-}
-
-static int
-bash_backward_shellword (count, key)
- int count, key;
-{
- size_t slen;
- int sindex, c, p;
- DECLARE_MBSTATE;
-
- if (count < 0)
- return (bash_forward_shellword (-count, key));
-
- p = rl_point;
- slen = rl_end;
-
- while (count)
- {
- if (p == 0)
- {
- rl_point = 0;
- return 0;
- }
-
- /* Move backward until we hit a non-metacharacter. */
- while (p > 0)
- {
- c = rl_line_buffer[p];
- if (WORDDELIM (c) && char_is_quoted (rl_line_buffer, p) == 0)
- BACKUP_CHAR (rl_line_buffer, slen, p);
- break;
- }
-
- if (p == 0)
- {
- rl_point = 0;
- return 0;
- }
-
- /* Now move backward until we hit a metacharacter or BOL. */
- while (p > 0)
- {
- c = rl_line_buffer[p];
- if (WORDDELIM (c) && char_is_quoted (rl_line_buffer, p) == 0)
- break;
- BACKUP_CHAR (rl_line_buffer, slen, p);
- }
-
- count--;
- }
-
- rl_point = p;
- return 0;
-}
-
-static int
-bash_kill_shellword (count, key)
- int count, key;
-{
- int p;
-
- if (count < 0)
- return (bash_backward_kill_shellword (-count, key));
-
- p = rl_point;
- bash_forward_shellword (count, key);
-
- if (rl_point != p)
- rl_kill_text (p, rl_point);
-
- rl_point = p;
- if (rl_editing_mode == 1) /* 1 == emacs_mode */
- rl_mark = rl_point;
-
- return 0;
-}
-
-static int
-bash_backward_kill_shellword (count, key)
- int count, key;
-{
- int p;
-
- if (count < 0)
- return (bash_kill_shellword (-count, key));
-
- p = rl_point;
- bash_backward_shellword (count, key);
-
- if (rl_point != p)
- rl_kill_text (p, rl_point);
-
- if (rl_editing_mode == 1) /* 1 == emacs_mode */
- rl_mark = rl_point;
-
- return 0;
-}
-
-
-/* **************************************************************** */
-/* */
-/* How To Do Shell Completion */
-/* */
-/* **************************************************************** */
-
-#define COMMAND_SEPARATORS ";|&{(`"
-/* )} */
-
-static int
-check_redir (ti)
- int ti;
-{
- register int this_char, prev_char;
-
- /* Handle the two character tokens `>&', `<&', and `>|'.
- We are not in a command position after one of these. */
- this_char = rl_line_buffer[ti];
- prev_char = rl_line_buffer[ti - 1];
-
- if ((this_char == '&' && (prev_char == '<' || prev_char == '>')) ||
- (this_char == '|' && prev_char == '>'))
- return (1);
- else if ((this_char == '{' && prev_char == '$') || /* } */
- (char_is_quoted (rl_line_buffer, ti)))
- return (1);
- return (0);
-}
-
-#if defined (PROGRAMMABLE_COMPLETION)
-/*
- * XXX - because of the <= start test, and setting os = s+1, this can
- * potentially return os > start. This is probably not what we want to
- * happen, but fix later after 2.05a-release.
- */
-static int
-find_cmd_start (start)
- int start;
-{
- register int s, os;
-
- os = 0;
- while (((s = skip_to_delim (rl_line_buffer, os, COMMAND_SEPARATORS, SD_NOJMP|SD_NOSKIPCMD)) <= start) &&
- rl_line_buffer[s])
- os = s+1;
- return os;
-}
-
-static int
-find_cmd_end (end)
- int end;
-{
- register int e;
-
- e = skip_to_delim (rl_line_buffer, end, COMMAND_SEPARATORS, SD_NOJMP);
- return e;
-}
-
-static char *
-find_cmd_name (start, sp, ep)
- int start;
- int *sp, *ep;
-{
- char *name;
- register int s, e;
-
- for (s = start; whitespace (rl_line_buffer[s]); s++)
- ;
-
- /* skip until a shell break character */
- e = skip_to_delim (rl_line_buffer, s, "()<>;&| \t\n", SD_NOJMP);
-
- name = substring (rl_line_buffer, s, e);
-
- if (sp)
- *sp = s;
- if (ep)
- *ep = e;
-
- return (name);
-}
-
-static char *
-prog_complete_return (text, matchnum)
- const char *text;
- int matchnum;
-{
- static int ind;
-
- if (matchnum == 0)
- ind = 0;
-
- if (prog_complete_matches == 0 || prog_complete_matches[ind] == 0)
- return (char *)NULL;
- return (prog_complete_matches[ind++]);
-}
-
-#endif /* PROGRAMMABLE_COMPLETION */
-
-/* Do some completion on TEXT. The indices of TEXT in RL_LINE_BUFFER are
- at START and END. Return an array of matches, or NULL if none. */
-static char **
-attempt_shell_completion (text, start, end)
- const char *text;
- int start, end;
-{
- int in_command_position, ti, saveti, qc, dflags;
- char **matches, *command_separator_chars;
-
- command_separator_chars = COMMAND_SEPARATORS;
- matches = (char **)NULL;
- rl_ignore_some_completions_function = filename_completion_ignore;
-
- rl_filename_quote_characters = default_filename_quote_characters;
-
- /* Determine if this could be a command word. It is if it appears at
- the start of the line (ignoring preceding whitespace), or if it
- appears after a character that separates commands. It cannot be a
- command word if we aren't at the top-level prompt. */
- ti = start - 1;
- saveti = qc = -1;
-
- while ((ti > -1) && (whitespace (rl_line_buffer[ti])))
- ti--;
-
-#if 1
- /* If this is an open quote, maybe we're trying to complete a quoted
- command name. */
- if (ti >= 0 && (rl_line_buffer[ti] == '"' || rl_line_buffer[ti] == '\''))
- {
- qc = rl_line_buffer[ti];
- saveti = ti--;
- while (ti > -1 && (whitespace (rl_line_buffer[ti])))
- ti--;
- }
-#endif
-
- in_command_position = 0;
- if (ti < 0)
- {
- /* Only do command completion at the start of a line when we
- are prompting at the top level. */
- if (current_prompt_string == ps1_prompt)
- in_command_position++;
- }
- else if (member (rl_line_buffer[ti], command_separator_chars))
- {
- in_command_position++;
-
- if (check_redir (ti) == 1)
- in_command_position = 0;
- }
- else
- {
- /* This still could be in command position. It is possible
- that all of the previous words on the line are variable
- assignments. */
- }
-
- /* Check that we haven't incorrectly flagged a closed command substitution
- as indicating we're in a command position. */
- if (in_command_position && ti >= 0 && rl_line_buffer[ti] == '`' &&
- *text != '`' && unclosed_pair (rl_line_buffer, end, "`") == 0)
- in_command_position = 0;
-
- /* Special handling for command substitution. If *TEXT is a backquote,
- it can be the start or end of an old-style command substitution, or
- unmatched. If it's unmatched, both calls to unclosed_pair will
- succeed. Don't bother if readline found a single quote and we are
- completing on the substring. */
- if (*text == '`' && rl_completion_quote_character != '\'' &&
- (in_command_position || (unclosed_pair (rl_line_buffer, start, "`") &&
- unclosed_pair (rl_line_buffer, end, "`"))))
- matches = rl_completion_matches (text, command_subst_completion_function);
-
-#if defined (PROGRAMMABLE_COMPLETION)
- /* Attempt programmable completion. */
- if (matches == 0 && (in_command_position == 0 || text[0] == '\0') &&
- prog_completion_enabled && (progcomp_size () > 0) &&
- current_prompt_string == ps1_prompt)
- {
- int s, e, s1, e1, foundcs;
- char *n;
-
- /* XXX - don't free the members */
- if (prog_complete_matches)
- free (prog_complete_matches);
- prog_complete_matches = (char **)NULL;
-
- s = find_cmd_start (start);
- e = find_cmd_end (end);
- n = find_cmd_name (s, &s1, &e1);
- if (start == 0 && end == 0 && e != 0 && text[0] == '\0') /* beginning of non-empty line */
- foundcs = 0;
- else if (start == end && start == s1 && e1 > end)
- foundcs = 0;
- else if (e == 0 && e == s && text[0] == '\0') /* beginning of empty line */
- prog_complete_matches = programmable_completions ("_EmptycmD_", text, s, e, &foundcs);
- else if (start == end && text[0] == '\0' && s1 > start && whitespace (rl_line_buffer[start]))
- foundcs = 0; /* whitespace before command name */
- else if (e > s && assignment (n, 0) == 0)
- prog_complete_matches = programmable_completions (n, text, s, e, &foundcs);
- else
- foundcs = 0;
- FREE (n);
- /* XXX - if we found a COMPSPEC for the command, just return whatever
- the programmable completion code returns, and disable the default
- filename completion that readline will do unless the COPT_DEFAULT
- option has been set with the `-o default' option to complete or
- compopt. */
- if (foundcs)
- {
- pcomp_set_readline_variables (foundcs, 1);
- /* Turn what the programmable completion code returns into what
- readline wants. I should have made compute_lcd_of_matches
- external... */
- matches = rl_completion_matches (text, prog_complete_return);
- if ((foundcs & COPT_DEFAULT) == 0)
- rl_attempted_completion_over = 1; /* no default */
- if (matches || ((foundcs & COPT_BASHDEFAULT) == 0))
- return (matches);
- }
- }
-#endif
-
- if (matches == 0)
- {
- dflags = 0;
- if (in_command_position)
- dflags |= DEFCOMP_CMDPOS;
- matches = bash_default_completion (text, start, end, qc, dflags);
- }
-
- return matches;
-}
-
-char **
-bash_default_completion (text, start, end, qc, compflags)
- const char *text;
- int start, end, qc, compflags;
-{
- char **matches;
-
- matches = (char **)NULL;
-
- /* New posix-style command substitution or variable name? */
- if (!matches && *text == '$')
- {
- if (qc != '\'' && text[1] == '(') /* ) */
- matches = rl_completion_matches (text, command_subst_completion_function);
- else
- matches = rl_completion_matches (text, variable_completion_function);
- }
-
- /* If the word starts in `~', and there is no slash in the word, then
- try completing this word as a username. */
- if (matches == 0 && *text == '~' && mbschr (text, '/') == 0)
- matches = rl_completion_matches (text, rl_username_completion_function);
-
- /* Another one. Why not? If the word starts in '@', then look through
- the world of known hostnames for completion first. */
- if (matches == 0 && perform_hostname_completion && *text == '@')
- matches = rl_completion_matches (text, hostname_completion_function);
-
- /* And last, (but not least) if this word is in a command position, then
- complete over possible command names, including aliases, functions,
- and command names. */
- if (matches == 0 && (compflags & DEFCOMP_CMDPOS))
- {
- /* If END == START and text[0] == 0, we are trying to complete an empty
- command word. */
- if (no_empty_command_completion && end == start && text[0] == '\0')
- {
- matches = (char **)NULL;
- rl_ignore_some_completions_function = bash_ignore_everything;
- }
- else
- {
-#define CMD_IS_DIR(x) (absolute_pathname(x) == 0 && absolute_program(x) == 0 && *(x) != '~' && test_for_directory (x))
-
- dot_in_path = 0;
- matches = rl_completion_matches (text, command_word_completion_function);
-
- /* If we are attempting command completion and nothing matches, we
- do not want readline to perform filename completion for us. We
- still want to be able to complete partial pathnames, so set the
- completion ignore function to something which will remove
- filenames and leave directories in the match list. */
- if (matches == (char **)NULL)
- rl_ignore_some_completions_function = bash_ignore_filenames;
- else if (matches[1] == 0 && CMD_IS_DIR(matches[0]) && dot_in_path == 0)
- /* If we found a single match, without looking in the current
- directory (because it's not in $PATH), but the found name is
- also a command in the current directory, suppress appending any
- terminating character, since it's ambiguous. */
- {
- rl_completion_suppress_append = 1;
- rl_filename_completion_desired = 0;
- }
- else if (matches[0] && matches[1] && STREQ (matches[0], matches[1]) && CMD_IS_DIR (matches[0]))
- /* There are multiple instances of the same match (duplicate
- completions haven't yet been removed). In this case, all of
- the matches will be the same, and the duplicate removal code
- will distill them all down to one. We turn on
- rl_completion_suppress_append for the same reason as above.
- Remember: we only care if there's eventually a single unique
- completion. If there are multiple completions this won't
- make a difference and the problem won't occur. */
- {
- rl_completion_suppress_append = 1;
- rl_filename_completion_desired = 0;
- }
- }
- }
-
- /* This could be a globbing pattern, so try to expand it using pathname
- expansion. */
- if (!matches && glob_pattern_p (text))
- {
- matches = rl_completion_matches (text, glob_complete_word);
- /* A glob expression that matches more than one filename is problematic.
- If we match more than one filename, punt. */
- if (matches && matches[1] && rl_completion_type == TAB)
- {
- strvec_dispose (matches);
- matches = (char **)0;
- }
- }
-
- return (matches);
-}
-
-/* This is the function to call when the word to complete is in a position
- where a command word can be found. It grovels $PATH, looking for commands
- that match. It also scans aliases, function names, and the shell_builtin
- table. */
-char *
-command_word_completion_function (hint_text, state)
- const char *hint_text;
- int state;
-{
- static char *hint = (char *)NULL;
- static char *path = (char *)NULL;
- static char *val = (char *)NULL;
- static char *filename_hint = (char *)NULL;
- static char *dequoted_hint = (char *)NULL;
- static char *directory_part = (char *)NULL;
- static char **glob_matches = (char **)NULL;
- static int path_index, hint_len, dequoted_len, istate, igncase;
- static int mapping_over, local_index, searching_path, hint_is_dir;
- static int old_glob_ignore_case, globpat;
- static SHELL_VAR **varlist = (SHELL_VAR **)NULL;
-#if defined (ALIAS)
- static alias_t **alias_list = (alias_t **)NULL;
-#endif /* ALIAS */
- char *temp, *cval;
-
- /* We have to map over the possibilities for command words. If we have
- no state, then make one just for that purpose. */
- if (state == 0)
- {
- if (dequoted_hint && dequoted_hint != hint)
- free (dequoted_hint);
- if (hint)
- free (hint);
-
- mapping_over = searching_path = 0;
- hint_is_dir = CMD_IS_DIR (hint_text);
- val = (char *)NULL;
-
- temp = rl_variable_value ("completion-ignore-case");
- igncase = RL_BOOLEAN_VARIABLE_VALUE (temp);
-
- if (glob_matches)
- {
- free (glob_matches);
- glob_matches = (char **)NULL;
- }
-
- globpat = glob_pattern_p (hint_text);
-
- /* If this is an absolute program name, do not check it against
- aliases, reserved words, functions or builtins. We must check
- whether or not it is unique, and, if so, whether that filename
- is executable. */
- if (globpat || absolute_program (hint_text))
- {
- /* Perform tilde expansion on what's passed, so we don't end up
- passing filenames with tildes directly to stat(). */
- if (*hint_text == '~')
- {
- hint = bash_tilde_expand (hint_text, 0);
- directory_part = savestring (hint_text);
- temp = strchr (directory_part, '/');
- if (temp)
- *temp = 0;
- else
- {
- free (directory_part);
- directory_part = (char *)NULL;
- }
- }
- else
- hint = savestring (hint_text);
-
- dequoted_hint = hint;
- /* If readline's completer found a quote character somewhere, but
- didn't set the quote character, there must have been a quote
- character embedded in the filename. It can't be at the start of
- the filename, so we need to dequote the filename before we look
- in the file system for it. */
- if (rl_completion_found_quote && rl_completion_quote_character == 0)
- {
- dequoted_hint = bash_dequote_filename (hint, 0);
- free (hint);
- hint = dequoted_hint;
- }
- dequoted_len = hint_len = strlen (hint);
-
- if (filename_hint)
- free (filename_hint);
-
- filename_hint = savestring (hint);
-
- istate = 0;
-
- if (globpat)
- {
- mapping_over = 5;
- goto globword;
- }
- else
- {
- mapping_over = 4;
- goto inner;
- }
- }
-
- dequoted_hint = hint = savestring (hint_text);
- dequoted_len = hint_len = strlen (hint);
-
- if (rl_completion_found_quote && rl_completion_quote_character == 0)
- {
- dequoted_hint = bash_dequote_filename (hint, 0);
- dequoted_len = strlen (dequoted_hint);
- }
-
- path = get_string_value ("PATH");
- path_index = dot_in_path = 0;
-
- /* Initialize the variables for each type of command word. */
- local_index = 0;
-
- if (varlist)
- free (varlist);
-
- varlist = all_visible_functions ();
-
-#if defined (ALIAS)
- if (alias_list)
- free (alias_list);
-
- alias_list = all_aliases ();
-#endif /* ALIAS */
- }
-
- /* mapping_over says what we are currently hacking. Note that every case
- in this list must fall through when there are no more possibilities. */
-
- switch (mapping_over)
- {
- case 0: /* Aliases come first. */
-#if defined (ALIAS)
- while (alias_list && alias_list[local_index])
- {
- register char *alias;
-
- alias = alias_list[local_index++]->name;
-
- if (STREQN (alias, hint, hint_len))
- return (savestring (alias));
- }
-#endif /* ALIAS */
- local_index = 0;
- mapping_over++;
-
- case 1: /* Then shell reserved words. */
- {
- while (word_token_alist[local_index].word)
- {
- register char *reserved_word;
-
- reserved_word = word_token_alist[local_index++].word;
-
- if (STREQN (reserved_word, hint, hint_len))
- return (savestring (reserved_word));
- }
- local_index = 0;
- mapping_over++;
- }
-
- case 2: /* Then function names. */
- while (varlist && varlist[local_index])
- {
- register char *varname;
-
- varname = varlist[local_index++]->name;
-
- if (STREQN (varname, hint, hint_len))
- return (savestring (varname));
- }
- local_index = 0;
- mapping_over++;
-
- case 3: /* Then shell builtins. */
- for (; local_index < num_shell_builtins; local_index++)
- {
- /* Ignore it if it doesn't have a function pointer or if it
- is not currently enabled. */
- if (!shell_builtins[local_index].function ||
- (shell_builtins[local_index].flags & BUILTIN_ENABLED) == 0)
- continue;
-
- if (STREQN (shell_builtins[local_index].name, hint, hint_len))
- {
- int i = local_index++;
-
- return (savestring (shell_builtins[i].name));
- }
- }
- local_index = 0;
- mapping_over++;
- }
-
-globword:
- /* Limited support for completing command words with globbing chars. Only
- a single match (multiple matches that end up reducing the number of
- characters in the common prefix are bad) will ever be returned on
- regular completion. */
- if (globpat)
- {
- if (state == 0)
- {
- glob_ignore_case = igncase;
- glob_matches = shell_glob_filename (hint);
- glob_ignore_case = old_glob_ignore_case;
-
- if (GLOB_FAILED (glob_matches) || glob_matches == 0)
- {
- glob_matches = (char **)NULL;
- return ((char *)NULL);
- }
-
- local_index = 0;
-
- if (glob_matches[1] && rl_completion_type == TAB) /* multiple matches are bad */
- return ((char *)NULL);
- }
-
- while (val = glob_matches[local_index++])
- {
- if (executable_or_directory (val))
- {
- if (*hint_text == '~')
- {
- temp = restore_tilde (val, directory_part);
- free (val);
- val = temp;
- }
- return (val);
- }
- free (val);
- }
-
- glob_ignore_case = old_glob_ignore_case;
- return ((char *)NULL);
- }
-
- /* If the text passed is a directory in the current directory, return it
- as a possible match. Executables in directories in the current
- directory can be specified using relative pathnames and successfully
- executed even when `.' is not in $PATH. */
- if (hint_is_dir)
- {
- hint_is_dir = 0; /* only return the hint text once */
- return (savestring (hint_text));
- }
-
- /* Repeatedly call filename_completion_function while we have
- members of PATH left. Question: should we stat each file?
- Answer: we call executable_file () on each file. */
- outer:
-
- istate = (val != (char *)NULL);
-
- if (istate == 0)
- {
- char *current_path;
-
- /* Get the next directory from the path. If there is none, then we
- are all done. */
- if (path == 0 || path[path_index] == 0 ||
- (current_path = extract_colon_unit (path, &path_index)) == 0)
- return ((char *)NULL);
-
- searching_path = 1;
- if (*current_path == 0)
- {
- free (current_path);
- current_path = savestring (".");
- }
-
- if (*current_path == '~')
- {
- char *t;
-
- t = bash_tilde_expand (current_path, 0);
- free (current_path);
- current_path = t;
- }
-
- if (current_path[0] == '.' && current_path[1] == '\0')
- dot_in_path = 1;
-
- if (filename_hint)
- free (filename_hint);
-
- filename_hint = sh_makepath (current_path, hint, 0);
- free (current_path); /* XXX */
- }
-
- inner:
- val = rl_filename_completion_function (filename_hint, istate);
- istate = 1;
-
- if (val == 0)
- {
- /* If the hint text is an absolute program, then don't bother
- searching through PATH. */
- if (absolute_program (hint))
- return ((char *)NULL);
-
- goto outer;
- }
- else
- {
- int match, freetemp;
-
- if (absolute_program (hint))
- {
- if (igncase == 0)
- match = strncmp (val, hint, hint_len) == 0;
- else
- match = strncasecmp (val, hint, hint_len) == 0;
-
- /* If we performed tilde expansion, restore the original
- filename. */
- if (*hint_text == '~')
- temp = restore_tilde (val, directory_part);
- else
- temp = savestring (val);
- freetemp = 1;
- }
- else
- {
- temp = strrchr (val, '/');
-
- if (temp)
- {
- temp++;
- if (igncase == 0)
- freetemp = match = strncmp (temp, hint, hint_len) == 0;
- else
- freetemp = match = strncasecmp (temp, hint, hint_len) == 0;
- if (match)
- temp = savestring (temp);
- }
- else
- freetemp = match = 0;
- }
-
- /* If we have found a match, and it is an executable file, return it.
- We don't return directory names when searching $PATH, since the
- bash execution code won't find executables in directories which
- appear in directories in $PATH when they're specified using
- relative pathnames. */
-#if 0
- /* If we're not searching $PATH and we have a relative pathname, we
- need to re-canonicalize it before testing whether or not it's an
- executable or a directory so the shell treats .. relative to $PWD
- according to the physical/logical option. The shell already
- canonicalizes the directory name in order to tell readline where
- to look, so not doing it here will be inconsistent. */
- /* XXX -- currently not used -- will introduce more inconsistency,
- since shell does not canonicalize ../foo before passing it to
- shell_execve(). */
- if (match && searching_path == 0 && *val == '.')
- {
- char *t, *t1;
-
- t = get_working_directory ("command-word-completion");
- t1 = make_absolute (val, t);
- free (t);
- cval = sh_canonpath (t1, PATH_CHECKDOTDOT|PATH_CHECKEXISTS);
- }
- else
-#endif
- cval = val;
-
- if (match && (searching_path ? executable_file (val) : executable_or_directory (cval)))
- {
- if (cval != val)
- free (cval);
- free (val);
- val = ""; /* So it won't be NULL. */
- return (temp);
- }
- else
- {
- if (freetemp)
- free (temp);
- if (cval != val)
- free (cval);
- free (val);
- goto inner;
- }
- }
-}
-
-/* Completion inside an unterminated command substitution. */
-static char *
-command_subst_completion_function (text, state)
- const char *text;
- int state;
-{
- static char **matches = (char **)NULL;
- static const char *orig_start;
- static char *filename_text = (char *)NULL;
- static int cmd_index, start_len;
- char *value;
-
- if (state == 0)
- {
- if (filename_text)
- free (filename_text);
- orig_start = text;
- if (*text == '`')
- text++;
- else if (*text == '$' && text[1] == '(') /* ) */
- text += 2;
- /* If the text was quoted, suppress any quote character that the
- readline completion code would insert. */
- rl_completion_suppress_quote = 1;
- start_len = text - orig_start;
- filename_text = savestring (text);
- if (matches)
- free (matches);
-
- /*
- * At this point we can entertain the idea of re-parsing
- * `filename_text' into a (possibly incomplete) command name and
- * arguments, and doing completion based on that. This is
- * currently very rudimentary, but it is a small improvement.
- */
- for (value = filename_text + strlen (filename_text) - 1; value > filename_text; value--)
- if (whitespace (*value) || member (*value, COMMAND_SEPARATORS))
- break;
- if (value <= filename_text)
- matches = rl_completion_matches (filename_text, command_word_completion_function);
- else
- {
- value++;
- start_len += value - filename_text;
- if (whitespace (value[-1]))
- matches = rl_completion_matches (value, rl_filename_completion_function);
- else
- matches = rl_completion_matches (value, command_word_completion_function);
- }
-
- /* If there is more than one match, rl_completion_matches has already
- put the lcd in matches[0]. Skip over it. */
- cmd_index = matches && matches[0] && matches[1];
-
- /* If there's a single match and it's a directory, set the append char
- to the expected `/'. Otherwise, don't append anything. */
- if (matches && matches[0] && matches[1] == 0 && test_for_directory (matches[0]))
- rl_completion_append_character = '/';
- else
- rl_completion_suppress_append = 1;
- }
-
- if (!matches || !matches[cmd_index])
- {
- rl_filename_quoting_desired = 0; /* disable quoting */
- return ((char *)NULL);
- }
- else
- {
- value = (char *)xmalloc (1 + start_len + strlen (matches[cmd_index]));
-
- if (start_len == 1)
- value[0] = *orig_start;
- else
- strncpy (value, orig_start, start_len);
-
- strcpy (value + start_len, matches[cmd_index]);
-
- cmd_index++;
- return (value);
- }
-}
-
-/* Okay, now we write the entry_function for variable completion. */
-static char *
-variable_completion_function (text, state)
- const char *text;
- int state;
-{
- static char **varlist = (char **)NULL;
- static int varlist_index;
- static char *varname = (char *)NULL;
- static int namelen;
- static int first_char, first_char_loc;
-
- if (!state)
- {
- if (varname)
- free (varname);
-
- first_char_loc = 0;
- first_char = text[0];
-
- if (first_char == '$')
- first_char_loc++;
-
- if (text[first_char_loc] == '{')
- first_char_loc++;
-
- varname = savestring (text + first_char_loc);
-
- namelen = strlen (varname);
- if (varlist)
- strvec_dispose (varlist);
-
- varlist = all_variables_matching_prefix (varname);
- varlist_index = 0;
- }
-
- if (!varlist || !varlist[varlist_index])
- {
- return ((char *)NULL);
- }
- else
- {
- char *value;
-
- value = (char *)xmalloc (4 + strlen (varlist[varlist_index]));
-
- if (first_char_loc)
- {
- value[0] = first_char;
- if (first_char_loc == 2)
- value[1] = '{';
- }
-
- strcpy (value + first_char_loc, varlist[varlist_index]);
- if (first_char_loc == 2)
- strcat (value, "}");
-
- varlist_index++;
- return (value);
- }
-}
-
-/* How about a completion function for hostnames? */
-static char *
-hostname_completion_function (text, state)
- const char *text;
- int state;
-{
- static char **list = (char **)NULL;
- static int list_index = 0;
- static int first_char, first_char_loc;
-
- /* If we don't have any state, make some. */
- if (state == 0)
- {
- FREE (list);
-
- list = (char **)NULL;
-
- first_char_loc = 0;
- first_char = *text;
-
- if (first_char == '@')
- first_char_loc++;
-
- list = hostnames_matching ((char *)text+first_char_loc);
- list_index = 0;
- }
-
- if (list && list[list_index])
- {
- char *t;
-
- t = (char *)xmalloc (2 + strlen (list[list_index]));
- *t = first_char;
- strcpy (t + first_char_loc, list[list_index]);
- list_index++;
- return (t);
- }
-
- return ((char *)NULL);
-}
-
-/*
- * A completion function for service names from /etc/services (or wherever).
- */
-char *
-bash_servicename_completion_function (text, state)
- const char *text;
- int state;
-{
-#if defined (__WIN32__) || defined (__OPENNT) || !defined (HAVE_GETSERVENT)
- return ((char *)NULL);
-#else
- static char *sname = (char *)NULL;
- static struct servent *srvent;
- static int snamelen, firstc;
- char *value;
- char **alist, *aentry;
- int afound;
-
- if (state == 0)
- {
- FREE (sname);
- firstc = *text;
-
- sname = savestring (text);
- snamelen = strlen (sname);
- setservent (0);
- }
-
- while (srvent = getservent ())
- {
- afound = 0;
- if (snamelen == 0 || (STREQN (sname, srvent->s_name, snamelen)))
- break;
- /* Not primary, check aliases */
- for (alist = srvent->s_aliases; *alist; alist++)
- {
- aentry = *alist;
- if (STREQN (sname, aentry, snamelen))
- {
- afound = 1;
- break;
- }
- }
-
- if (afound)
- break;
- }
-
- if (srvent == 0)
- {
- endservent ();
- return ((char *)NULL);
- }
-
- value = afound ? savestring (aentry) : savestring (srvent->s_name);
- return value;
-#endif
-}
-
-/*
- * A completion function for group names from /etc/group (or wherever).
- */
-char *
-bash_groupname_completion_function (text, state)
- const char *text;
- int state;
-{
-#if defined (__WIN32__) || defined (__OPENNT) || !defined (HAVE_GRP_H)
- return ((char *)NULL);
-#else
- static char *gname = (char *)NULL;
- static struct group *grent;
- static int gnamelen;
- char *value;
-
- if (state == 0)
- {
- FREE (gname);
- gname = savestring (text);
- gnamelen = strlen (gname);
-
- setgrent ();
- }
-
- while (grent = getgrent ())
- {
- if (gnamelen == 0 || (STREQN (gname, grent->gr_name, gnamelen)))
- break;
- }
-
- if (grent == 0)
- {
- endgrent ();
- return ((char *)NULL);
- }
-
- value = savestring (grent->gr_name);
- return (value);
-#endif
-}
-
-/* Functions to perform history and alias expansions on the current line. */
-
-#if defined (BANG_HISTORY)
-/* Perform history expansion on the current line. If no history expansion
- is done, pre_process_line() returns what it was passed, so we need to
- allocate a new line here. */
-static char *
-history_expand_line_internal (line)
- char *line;
-{
- char *new_line;
- int old_verify;
-
- old_verify = hist_verify;
- hist_verify = 0;
- new_line = pre_process_line (line, 0, 0);
- hist_verify = old_verify;
-
- return (new_line == line) ? savestring (line) : new_line;
-}
-#endif
-
-/* There was an error in expansion. Let the preprocessor print
- the error here. */
-static void
-cleanup_expansion_error ()
-{
- char *to_free;
-#if defined (BANG_HISTORY)
- int old_verify;
-
- old_verify = hist_verify;
- hist_verify = 0;
-#endif
-
- fprintf (rl_outstream, "\r\n");
- to_free = pre_process_line (rl_line_buffer, 1, 0);
-#if defined (BANG_HISTORY)
- hist_verify = old_verify;
-#endif
- if (to_free != rl_line_buffer)
- FREE (to_free);
- putc ('\r', rl_outstream);
- rl_forced_update_display ();
-}
-
-/* If NEW_LINE differs from what is in the readline line buffer, add an
- undo record to get from the readline line buffer contents to the new
- line and make NEW_LINE the current readline line. */
-static void
-maybe_make_readline_line (new_line)
- char *new_line;
-{
- if (strcmp (new_line, rl_line_buffer) != 0)
- {
- rl_point = rl_end;
-
- rl_add_undo (UNDO_BEGIN, 0, 0, 0);
- rl_delete_text (0, rl_point);
- rl_point = rl_end = rl_mark = 0;
- rl_insert_text (new_line);
- rl_add_undo (UNDO_END, 0, 0, 0);
- }
-}
-
-/* Make NEW_LINE be the current readline line. This frees NEW_LINE. */
-static void
-set_up_new_line (new_line)
- char *new_line;
-{
- int old_point, at_end;
-
- old_point = rl_point;
- at_end = rl_point == rl_end;
-
- /* If the line was history and alias expanded, then make that
- be one thing to undo. */
- maybe_make_readline_line (new_line);
- free (new_line);
-
- /* Place rl_point where we think it should go. */
- if (at_end)
- rl_point = rl_end;
- else if (old_point < rl_end)
- {
- rl_point = old_point;
- if (!whitespace (rl_line_buffer[rl_point]))
- rl_forward_word (1, 0);
- }
-}
-
-#if defined (ALIAS)
-/* Expand aliases in the current readline line. */
-static int
-alias_expand_line (count, ignore)
- int count, ignore;
-{
- char *new_line;
-
- new_line = alias_expand (rl_line_buffer);
-
- if (new_line)
- {
- set_up_new_line (new_line);
- return (0);
- }
- else
- {
- cleanup_expansion_error ();
- return (1);
- }
-}
-#endif
-
-#if defined (BANG_HISTORY)
-/* History expand the line. */
-static int
-history_expand_line (count, ignore)
- int count, ignore;
-{
- char *new_line;
-
- new_line = history_expand_line_internal (rl_line_buffer);
-
- if (new_line)
- {
- set_up_new_line (new_line);
- return (0);
- }
- else
- {
- cleanup_expansion_error ();
- return (1);
- }
-}
-
-/* Expand history substitutions in the current line and then insert a
- space (hopefully close to where we were before). */
-static int
-tcsh_magic_space (count, ignore)
- int count, ignore;
-{
- int dist_from_end, old_point;
-
- old_point = rl_point;
- dist_from_end = rl_end - rl_point;
- if (history_expand_line (count, ignore) == 0)
- {
- /* Try a simple heuristic from Stephen Gildea <gildea@intouchsys.com>.
- This works if all expansions were before rl_point or if no expansions
- were performed. */
- rl_point = (old_point == 0) ? old_point : rl_end - dist_from_end;
- rl_insert (1, ' ');
- return (0);
- }
- else
- return (1);
-}
-#endif /* BANG_HISTORY */
-
-/* History and alias expand the line. */
-static int
-history_and_alias_expand_line (count, ignore)
- int count, ignore;
-{
- char *new_line;
-
- new_line = 0;
-#if defined (BANG_HISTORY)
- new_line = history_expand_line_internal (rl_line_buffer);
-#endif
-
-#if defined (ALIAS)
- if (new_line)
- {
- char *alias_line;
-
- alias_line = alias_expand (new_line);
- free (new_line);
- new_line = alias_line;
- }
-#endif /* ALIAS */
-
- if (new_line)
- {
- set_up_new_line (new_line);
- return (0);
- }
- else
- {
- cleanup_expansion_error ();
- return (1);
- }
-}
-
-/* History and alias expand the line, then perform the shell word
- expansions by calling expand_string. This can't use set_up_new_line()
- because we want the variable expansions as a separate undo'able
- set of operations. */
-static int
-shell_expand_line (count, ignore)
- int count, ignore;
-{
- char *new_line;
- WORD_LIST *expanded_string;
-
- new_line = 0;
-#if defined (BANG_HISTORY)
- new_line = history_expand_line_internal (rl_line_buffer);
-#endif
-
-#if defined (ALIAS)
- if (new_line)
- {
- char *alias_line;
-
- alias_line = alias_expand (new_line);
- free (new_line);
- new_line = alias_line;
- }
-#endif /* ALIAS */
-
- if (new_line)
- {
- int old_point = rl_point;
- int at_end = rl_point == rl_end;
-
- /* If the line was history and alias expanded, then make that
- be one thing to undo. */
- maybe_make_readline_line (new_line);
- free (new_line);
-
- /* If there is variable expansion to perform, do that as a separate
- operation to be undone. */
- new_line = savestring (rl_line_buffer);
- expanded_string = expand_string (new_line, 0);
- FREE (new_line);
- if (expanded_string == 0)
- {
- new_line = (char *)xmalloc (1);
- new_line[0] = '\0';
- }
- else
- {
- new_line = string_list (expanded_string);
- dispose_words (expanded_string);
- }
-
- maybe_make_readline_line (new_line);
- free (new_line);
-
- /* Place rl_point where we think it should go. */
- if (at_end)
- rl_point = rl_end;
- else if (old_point < rl_end)
- {
- rl_point = old_point;
- if (!whitespace (rl_line_buffer[rl_point]))
- rl_forward_word (1, 0);
- }
- return 0;
- }
- else
- {
- cleanup_expansion_error ();
- return 1;
- }
-}
-
-/* If FIGNORE is set, then don't match files with the given suffixes when
- completing filenames. If only one of the possibilities has an acceptable
- suffix, delete the others, else just return and let the completer
- signal an error. It is called by the completer when real
- completions are done on filenames by the completer's internal
- function, not for completion lists (M-?) and not on "other"
- completion types, such as hostnames or commands. */
-
-static struct ignorevar fignore =
-{
- "FIGNORE",
- (struct ign *)0,
- 0,
- (char *)0,
- (sh_iv_item_func_t *) 0,
-};
-
-static void
-_ignore_completion_names (names, name_func)
- char **names;
- sh_ignore_func_t *name_func;
-{
- char **newnames;
- int idx, nidx;
- char **oldnames;
- int oidx;
-
- /* If there is only one completion, see if it is acceptable. If it is
- not, free it up. In any case, short-circuit and return. This is a
- special case because names[0] is not the prefix of the list of names
- if there is only one completion; it is the completion itself. */
- if (names[1] == (char *)0)
- {
- if (force_fignore)
- if ((*name_func) (names[0]) == 0)
- {
- free (names[0]);
- names[0] = (char *)NULL;
- }
-
- return;
- }
-
- /* Allocate space for array to hold list of pointers to matching
- filenames. The pointers are copied back to NAMES when done. */
- for (nidx = 1; names[nidx]; nidx++)
- ;
- newnames = strvec_create (nidx + 1);
-
- if (force_fignore == 0)
- {
- oldnames = strvec_create (nidx - 1);
- oidx = 0;
- }
-
- newnames[0] = names[0];
- for (idx = nidx = 1; names[idx]; idx++)
- {
- if ((*name_func) (names[idx]))
- newnames[nidx++] = names[idx];
- else if (force_fignore == 0)
- oldnames[oidx++] = names[idx];
- else
- free (names[idx]);
- }
-
- newnames[nidx] = (char *)NULL;
-
- /* If none are acceptable then let the completer handle it. */
- if (nidx == 1)
- {
- if (force_fignore)
- {
- free (names[0]);
- names[0] = (char *)NULL;
- }
- else
- free (oldnames);
-
- free (newnames);
- return;
- }
-
- if (force_fignore == 0)
- {
- while (oidx)
- free (oldnames[--oidx]);
- free (oldnames);
- }
-
- /* If only one is acceptable, copy it to names[0] and return. */
- if (nidx == 2)
- {
- free (names[0]);
- names[0] = newnames[1];
- names[1] = (char *)NULL;
- free (newnames);
- return;
- }
-
- /* Copy the acceptable names back to NAMES, set the new array end,
- and return. */
- for (nidx = 1; newnames[nidx]; nidx++)
- names[nidx] = newnames[nidx];
- names[nidx] = (char *)NULL;
- free (newnames);
-}
-
-static int
-name_is_acceptable (name)
- const char *name;
-{
- struct ign *p;
- int nlen;
-
- for (nlen = strlen (name), p = fignore.ignores; p->val; p++)
- {
- if (nlen > p->len && p->len > 0 && STREQ (p->val, &name[nlen - p->len]))
- return (0);
- }
-
- return (1);
-}
-
-#if 0
-static int
-ignore_dot_names (name)
- char *name;
-{
- return (name[0] != '.');
-}
-#endif
-
-static int
-filename_completion_ignore (names)
- char **names;
-{
-#if 0
- if (glob_dot_filenames == 0)
- _ignore_completion_names (names, ignore_dot_names);
-#endif
-
- setup_ignore_patterns (&fignore);
-
- if (fignore.num_ignores == 0)
- return 0;
-
- _ignore_completion_names (names, name_is_acceptable);
-
- return 0;
-}
-
-/* Return 1 if NAME is a directory. NAME undergoes tilde expansion. */
-static int
-test_for_directory (name)
- const char *name;
-{
- char *fn;
- int r;
-
- fn = bash_tilde_expand (name, 0);
- r = file_isdir (fn);
- free (fn);
-
- return (r);
-}
-
-/* Remove files from NAMES, leaving directories. */
-static int
-bash_ignore_filenames (names)
- char **names;
-{
- _ignore_completion_names (names, test_for_directory);
- return 0;
-}
-
-static int
-return_zero (name)
- const char *name;
-{
- return 0;
-}
-
-static int
-bash_ignore_everything (names)
- char **names;
-{
- _ignore_completion_names (names, return_zero);
- return 0;
-}
-
-/* Replace a tilde-prefix in VAL with a `~', assuming the user typed it. VAL
- is an expanded filename. DIRECTORY_PART is the tilde-prefix portion
- of the un-tilde-expanded version of VAL (what the user typed). */
-static char *
-restore_tilde (val, directory_part)
- char *val, *directory_part;
-{
- int l, vl, dl2, xl;
- char *dh2, *expdir, *ret;
-
- vl = strlen (val);
-
- /* We need to duplicate the expansions readline performs on the directory
- portion before passing it to our completion function. */
- dh2 = directory_part ? bash_dequote_filename (directory_part, 0) : 0;
- bash_directory_expansion (&dh2);
- dl2 = strlen (dh2);
-
- expdir = bash_tilde_expand (directory_part, 0);
- xl = strlen (expdir);
- free (expdir);
-
- /*
- dh2 = unexpanded but dequoted tilde-prefix
- dl2 = length of tilde-prefix
- expdir = tilde-expanded tilde-prefix
- xl = length of expanded tilde-prefix
- l = length of remainder after tilde-prefix
- */
- l = (vl - xl) + 1;
-
- ret = (char *)xmalloc (dl2 + 2 + l);
- strcpy (ret, dh2);
- strcpy (ret + dl2, val + xl);
-
- free (dh2);
- return (ret);
-}
-
-/* Simulate the expansions that will be performed by
- rl_filename_completion_function. This must be called with the address of
- a pointer to malloc'd memory. */
-static void
-bash_directory_expansion (dirname)
- char **dirname;
-{
- char *d, *nd;
-
- d = savestring (*dirname);
-
- if (rl_directory_rewrite_hook)
- (*rl_directory_rewrite_hook) (&d);
- else if (rl_directory_completion_hook && (*rl_directory_completion_hook) (&d))
- {
- free (*dirname);
- *dirname = d;
- }
- else if (rl_completion_found_quote)
- {
- nd = bash_dequote_filename (d, rl_completion_quote_character);
- free (*dirname);
- free (d);
- *dirname = nd;
- }
-}
-
-/* If necessary, rewrite directory entry */
-static char *
-bash_filename_rewrite_hook (fname, fnlen)
- char *fname;
- int fnlen;
-{
- char *conv;
-
- conv = fnx_fromfs (fname, fnlen);
- if (conv != fname)
- conv = savestring (conv);
- return conv;
-}
-
-/* Handle symbolic link references and other directory name
- expansions while hacking completion. This should return 1 if it modifies
- the DIRNAME argument, 0 otherwise. It should make sure not to modify
- DIRNAME if it returns 0. */
-static int
-bash_directory_completion_hook (dirname)
- char **dirname;
-{
- char *local_dirname, *new_dirname, *t;
- int return_value, should_expand_dirname, nextch, closer;
- WORD_LIST *wl;
- struct stat sb;
-
- return_value = should_expand_dirname = nextch = closer = 0;
- local_dirname = *dirname;
-
- if (t = mbschr (local_dirname, '$'))
- {
- should_expand_dirname = '$';
- nextch = t[1];
- /* Deliberately does not handle the deprecated $[...] arithmetic
- expansion syntax */
- if (nextch == '(')
- closer = ')';
- else if (nextch == '{')
- closer = '}';
- else
- nextch = 0;
- }
- else
- {
- t = mbschr (local_dirname, '`');
- if (t && unclosed_pair (local_dirname, strlen (local_dirname), "`") == 0)
- should_expand_dirname = '`';
- }
-
-#if defined (HAVE_LSTAT)
- if (should_expand_dirname && lstat (local_dirname, &sb) == 0)
-#else
- if (should_expand_dirname && stat (local_dirname, &sb) == 0)
-#endif
- should_expand_dirname = 0;
-
- if (should_expand_dirname)
- {
- new_dirname = savestring (local_dirname);
- wl = expand_prompt_string (new_dirname, 0, W_NOCOMSUB); /* does the right thing */
- if (wl)
- {
- *dirname = string_list (wl);
- /* Tell the completer to replace the directory name only if we
- actually expanded something. */
- return_value = STREQ (local_dirname, *dirname) == 0;
- free (local_dirname);
- free (new_dirname);
- dispose_words (wl);
- local_dirname = *dirname;
- /* XXX - change rl_filename_quote_characters here based on
- should_expand_dirname/nextch/closer. This is the only place
- custom_filename_quote_characters is modified. */
- if (rl_filename_quote_characters && *rl_filename_quote_characters)
- {
- int i, j, c;
- i = strlen (default_filename_quote_characters);
- custom_filename_quote_characters = xrealloc (custom_filename_quote_characters, i+1);
- for (i = j = 0; c = default_filename_quote_characters[i]; i++)
- {
- if (c == should_expand_dirname || c == nextch || c == closer)
- continue;
- custom_filename_quote_characters[j++] = c;
- }
- custom_filename_quote_characters[j] = '\0';
- rl_filename_quote_characters = custom_filename_quote_characters;
- }
- }
- else
- {
- free (new_dirname);
- free (local_dirname);
- *dirname = (char *)xmalloc (1);
- **dirname = '\0';
- return 1;
- }
- }
- else
- {
- /* Dequote the filename even if we don't expand it. */
- new_dirname = bash_dequote_filename (local_dirname, rl_completion_quote_character);
- return_value = STREQ (local_dirname, new_dirname) == 0;
- free (local_dirname);
- local_dirname = *dirname = new_dirname;
- }
-
- if (no_symbolic_links == 0 && (local_dirname[0] != '.' || local_dirname[1]))
- {
- char *temp1, *temp2;
- int len1, len2;
-
- t = get_working_directory ("symlink-hook");
- temp1 = make_absolute (local_dirname, t);
- free (t);
- temp2 = sh_canonpath (temp1, PATH_CHECKDOTDOT|PATH_CHECKEXISTS);
-
- /* Try spelling correction if initial canonicalization fails. */
- if (temp2 == 0 && dircomplete_spelling)
- {
- temp2 = dirspell (temp1);
- if (temp2)
- {
- free (temp1);
- temp1 = temp2;
- temp2 = sh_canonpath (temp1, PATH_CHECKDOTDOT|PATH_CHECKEXISTS);
- return_value |= temp2 != 0;
- }
- }
- /* If we can't canonicalize, bail. */
- if (temp2 == 0)
- {
- free (temp1);
- return return_value;
- }
- len1 = strlen (temp1);
- if (temp1[len1 - 1] == '/')
- {
- len2 = strlen (temp2);
- if (len2 > 2) /* don't append `/' to `/' or `//' */
- {
- temp2 = (char *)xrealloc (temp2, len2 + 2);
- temp2[len2] = '/';
- temp2[len2 + 1] = '\0';
- }
- }
- return_value |= STREQ (local_dirname, temp2) == 0;
- free (local_dirname);
- *dirname = temp2;
- free (temp1);
- }
-
- return (return_value);
-}
-
-static char **history_completion_array = (char **)NULL;
-static int harry_size;
-static int harry_len;
-
-static void
-build_history_completion_array ()
-{
- register int i, j;
- HIST_ENTRY **hlist;
- char **tokens;
-
- /* First, clear out the current dynamic history completion list. */
- if (harry_size)
- {
- strvec_dispose (history_completion_array);
- history_completion_array = (char **)NULL;
- harry_size = 0;
- harry_len = 0;
- }
-
- /* Next, grovel each line of history, making each shell-sized token
- a separate entry in the history_completion_array. */
- hlist = history_list ();
-
- if (hlist)
- {
- for (i = 0; hlist[i]; i++)
- ;
- for ( --i; i >= 0; i--)
- {
- /* Separate each token, and place into an array. */
- tokens = history_tokenize (hlist[i]->line);
-
- for (j = 0; tokens && tokens[j]; j++)
- {
- if (harry_len + 2 > harry_size)
- history_completion_array = strvec_resize (history_completion_array, harry_size += 10);
-
- history_completion_array[harry_len++] = tokens[j];
- history_completion_array[harry_len] = (char *)NULL;
- }
- free (tokens);
- }
-
- /* Sort the complete list of tokens. */
- if (dabbrev_expand_active == 0)
- qsort (history_completion_array, harry_len, sizeof (char *), (QSFUNC *)strvec_strcmp);
- }
-}
-
-static char *
-history_completion_generator (hint_text, state)
- const char *hint_text;
- int state;
-{
- static int local_index, len;
- static const char *text;
-
- /* If this is the first call to the generator, then initialize the
- list of strings to complete over. */
- if (state == 0)
- {
- if (dabbrev_expand_active) /* This is kind of messy */
- rl_completion_suppress_append = 1;
- local_index = 0;
- build_history_completion_array ();
- text = hint_text;
- len = strlen (text);
- }
-
- while (history_completion_array && history_completion_array[local_index])
- {
- if (strncmp (text, history_completion_array[local_index++], len) == 0)
- return (savestring (history_completion_array[local_index - 1]));
- }
- return ((char *)NULL);
-}
-
-static int
-dynamic_complete_history (count, key)
- int count, key;
-{
- int r;
- rl_compentry_func_t *orig_func;
- rl_completion_func_t *orig_attempt_func;
- rl_compignore_func_t *orig_ignore_func;
-
- orig_func = rl_completion_entry_function;
- orig_attempt_func = rl_attempted_completion_function;
- orig_ignore_func = rl_ignore_some_completions_function;
-
- rl_completion_entry_function = history_completion_generator;
- rl_attempted_completion_function = (rl_completion_func_t *)NULL;
- rl_ignore_some_completions_function = filename_completion_ignore;
-
- /* XXX - use rl_completion_mode here? */
- if (rl_last_func == dynamic_complete_history)
- r = rl_complete_internal ('?');
- else
- r = rl_complete_internal (TAB);
-
- rl_completion_entry_function = orig_func;
- rl_attempted_completion_function = orig_attempt_func;
- rl_ignore_some_completions_function = orig_ignore_func;
-
- return r;
-}
-
-static int
-bash_dabbrev_expand (count, key)
- int count, key;
-{
- int r, orig_suppress, orig_sort;
- rl_compentry_func_t *orig_func;
- rl_completion_func_t *orig_attempt_func;
- rl_compignore_func_t *orig_ignore_func;
-
- orig_func = rl_menu_completion_entry_function;
- orig_attempt_func = rl_attempted_completion_function;
- orig_ignore_func = rl_ignore_some_completions_function;
- orig_suppress = rl_completion_suppress_append;
- orig_sort = rl_sort_completion_matches;
-
- rl_menu_completion_entry_function = history_completion_generator;
- rl_attempted_completion_function = (rl_completion_func_t *)NULL;
- rl_ignore_some_completions_function = filename_completion_ignore;
- rl_filename_completion_desired = 0;
- rl_completion_suppress_append = 1;
- rl_sort_completion_matches = 0;
-
- /* XXX - use rl_completion_mode here? */
- dabbrev_expand_active = 1;
- if (rl_last_func == bash_dabbrev_expand)
- rl_last_func = rl_menu_complete;
- r = rl_menu_complete (count, key);
- dabbrev_expand_active = 0;
-
- rl_last_func = bash_dabbrev_expand;
- rl_menu_completion_entry_function = orig_func;
- rl_attempted_completion_function = orig_attempt_func;
- rl_ignore_some_completions_function = orig_ignore_func;
- rl_completion_suppress_append = orig_suppress;
- rl_sort_completion_matches = orig_sort;
-
- return r;
-}
-
-#if defined (SPECIFIC_COMPLETION_FUNCTIONS)
-static int
-bash_complete_username (ignore, ignore2)
- int ignore, ignore2;
-{
- return bash_complete_username_internal (rl_completion_mode (bash_complete_username));
-}
-
-static int
-bash_possible_username_completions (ignore, ignore2)
- int ignore, ignore2;
-{
- return bash_complete_username_internal ('?');
-}
-
-static int
-bash_complete_username_internal (what_to_do)
- int what_to_do;
-{
- return bash_specific_completion (what_to_do, rl_username_completion_function);
-}
-
-static int
-bash_complete_filename (ignore, ignore2)
- int ignore, ignore2;
-{
- return bash_complete_filename_internal (rl_completion_mode (bash_complete_filename));
-}
-
-static int
-bash_possible_filename_completions (ignore, ignore2)
- int ignore, ignore2;
-{
- return bash_complete_filename_internal ('?');
-}
-
-static int
-bash_complete_filename_internal (what_to_do)
- int what_to_do;
-{
- rl_compentry_func_t *orig_func;
- rl_completion_func_t *orig_attempt_func;
- rl_icppfunc_t *orig_dir_func;
- rl_compignore_func_t *orig_ignore_func;
- /*const*/ char *orig_rl_completer_word_break_characters;
- int r;
-
- orig_func = rl_completion_entry_function;
- orig_attempt_func = rl_attempted_completion_function;
- orig_dir_func = rl_directory_rewrite_hook;
- orig_ignore_func = rl_ignore_some_completions_function;
- orig_rl_completer_word_break_characters = rl_completer_word_break_characters;
- rl_completion_entry_function = rl_filename_completion_function;
- rl_attempted_completion_function = (rl_completion_func_t *)NULL;
- rl_directory_rewrite_hook = (rl_icppfunc_t *)NULL;
- rl_ignore_some_completions_function = filename_completion_ignore;
- rl_completer_word_break_characters = " \t\n\"\'";
-
- r = rl_complete_internal (what_to_do);
-
- rl_completion_entry_function = orig_func;
- rl_attempted_completion_function = orig_attempt_func;
- rl_directory_rewrite_hook = orig_dir_func;
- rl_ignore_some_completions_function = orig_ignore_func;
- rl_completer_word_break_characters = orig_rl_completer_word_break_characters;
-
- return r;
-}
-
-static int
-bash_complete_hostname (ignore, ignore2)
- int ignore, ignore2;
-{
- return bash_complete_hostname_internal (rl_completion_mode (bash_complete_hostname));
-}
-
-static int
-bash_possible_hostname_completions (ignore, ignore2)
- int ignore, ignore2;
-{
- return bash_complete_hostname_internal ('?');
-}
-
-static int
-bash_complete_variable (ignore, ignore2)
- int ignore, ignore2;
-{
- return bash_complete_variable_internal (rl_completion_mode (bash_complete_variable));
-}
-
-static int
-bash_possible_variable_completions (ignore, ignore2)
- int ignore, ignore2;
-{
- return bash_complete_variable_internal ('?');
-}
-
-static int
-bash_complete_command (ignore, ignore2)
- int ignore, ignore2;
-{
- return bash_complete_command_internal (rl_completion_mode (bash_complete_command));
-}
-
-static int
-bash_possible_command_completions (ignore, ignore2)
- int ignore, ignore2;
-{
- return bash_complete_command_internal ('?');
-}
-
-static int
-bash_complete_hostname_internal (what_to_do)
- int what_to_do;
-{
- return bash_specific_completion (what_to_do, hostname_completion_function);
-}
-
-static int
-bash_complete_variable_internal (what_to_do)
- int what_to_do;
-{
- return bash_specific_completion (what_to_do, variable_completion_function);
-}
-
-static int
-bash_complete_command_internal (what_to_do)
- int what_to_do;
-{
- return bash_specific_completion (what_to_do, command_word_completion_function);
-}
-
-static char *globtext;
-static char *globorig;
-
-static char *
-glob_complete_word (text, state)
- const char *text;
- int state;
-{
- static char **matches = (char **)NULL;
- static int ind;
- int glen;
- char *ret, *ttext;
-
- if (state == 0)
- {
- rl_filename_completion_desired = 1;
- FREE (matches);
- if (globorig != globtext)
- FREE (globorig);
- FREE (globtext);
-
- ttext = bash_tilde_expand (text, 0);
-
- if (rl_explicit_arg)
- {
- globorig = savestring (ttext);
- glen = strlen (ttext);
- globtext = (char *)xmalloc (glen + 2);
- strcpy (globtext, ttext);
- globtext[glen] = '*';
- globtext[glen+1] = '\0';
- }
- else
- globtext = globorig = savestring (ttext);
-
- if (ttext != text)
- free (ttext);
-
- matches = shell_glob_filename (globtext);
- if (GLOB_FAILED (matches))
- matches = (char **)NULL;
- ind = 0;
- }
-
- ret = matches ? matches[ind] : (char *)NULL;
- ind++;
- return ret;
-}
-
-static int
-bash_glob_completion_internal (what_to_do)
- int what_to_do;
-{
- return bash_specific_completion (what_to_do, glob_complete_word);
-}
-
-/* A special quoting function so we don't end up quoting globbing characters
- in the word if there are no matches or multiple matches. */
-static char *
-bash_glob_quote_filename (s, rtype, qcp)
- char *s;
- int rtype;
- char *qcp;
-{
- if (globorig && qcp && *qcp == '\0' && STREQ (s, globorig))
- return (savestring (s));
- else
- return (bash_quote_filename (s, rtype, qcp));
-}
-
-static int
-bash_glob_complete_word (count, key)
- int count, key;
-{
- int r;
- rl_quote_func_t *orig_quoting_function;
-
- if (rl_editing_mode == EMACS_EDITING_MODE)
- rl_explicit_arg = 1; /* force `*' append */
- orig_quoting_function = rl_filename_quoting_function;
- rl_filename_quoting_function = bash_glob_quote_filename;
-
- r = bash_glob_completion_internal (rl_completion_mode (bash_glob_complete_word));
-
- rl_filename_quoting_function = orig_quoting_function;
- return r;
-}
-
-static int
-bash_glob_expand_word (count, key)
- int count, key;
-{
- return bash_glob_completion_internal ('*');
-}
-
-static int
-bash_glob_list_expansions (count, key)
- int count, key;
-{
- return bash_glob_completion_internal ('?');
-}
-
-static int
-bash_specific_completion (what_to_do, generator)
- int what_to_do;
- rl_compentry_func_t *generator;
-{
- rl_compentry_func_t *orig_func;
- rl_completion_func_t *orig_attempt_func;
- rl_compignore_func_t *orig_ignore_func;
- int r;
-
- orig_func = rl_completion_entry_function;
- orig_attempt_func = rl_attempted_completion_function;
- orig_ignore_func = rl_ignore_some_completions_function;
- rl_completion_entry_function = generator;
- rl_attempted_completion_function = NULL;
- rl_ignore_some_completions_function = orig_ignore_func;
-
- r = rl_complete_internal (what_to_do);
-
- rl_completion_entry_function = orig_func;
- rl_attempted_completion_function = orig_attempt_func;
- rl_ignore_some_completions_function = orig_ignore_func;
-
- return r;
-}
-
-#endif /* SPECIFIC_COMPLETION_FUNCTIONS */
-
-#if defined (VI_MODE)
-/* Completion, from vi mode's point of view. This is a modified version of
- rl_vi_complete which uses the bash globbing code to implement what POSIX
- specifies, which is to append a `*' and attempt filename generation (which
- has the side effect of expanding any globbing characters in the word). */
-static int
-bash_vi_complete (count, key)
- int count, key;
-{
-#if defined (SPECIFIC_COMPLETION_FUNCTIONS)
- int p, r;
- char *t;
-
- if ((rl_point < rl_end) && (!whitespace (rl_line_buffer[rl_point])))
- {
- if (!whitespace (rl_line_buffer[rl_point + 1]))
- rl_vi_end_word (1, 'E');
- rl_point++;
- }
-
- /* Find boundaries of current word, according to vi definition of a
- `bigword'. */
- t = 0;
- if (rl_point > 0)
- {
- p = rl_point;
- rl_vi_bWord (1, 'B');
- r = rl_point;
- rl_point = p;
- p = r;
-
- t = substring (rl_line_buffer, p, rl_point);
- }
-
- if (t && glob_pattern_p (t) == 0)
- rl_explicit_arg = 1; /* XXX - force glob_complete_word to append `*' */
- FREE (t);
-
- if (key == '*') /* Expansion and replacement. */
- r = bash_glob_expand_word (count, key);
- else if (key == '=') /* List possible completions. */
- r = bash_glob_list_expansions (count, key);
- else if (key == '\\') /* Standard completion */
- r = bash_glob_complete_word (count, key);
- else
- r = rl_complete (0, key);
-
- if (key == '*' || key == '\\')
- rl_vi_start_inserting (key, 1, 1);
-
- return (r);
-#else
- return rl_vi_complete (count, key);
-#endif /* !SPECIFIC_COMPLETION_FUNCTIONS */
-}
-#endif /* VI_MODE */
-
-/* Filename quoting for completion. */
-/* A function to strip unquoted quote characters (single quotes, double
- quotes, and backslashes). It allows single quotes to appear
- within double quotes, and vice versa. It should be smarter. */
-static char *
-bash_dequote_filename (text, quote_char)
- char *text;
- int quote_char;
-{
- char *ret, *p, *r;
- int l, quoted;
-
- l = strlen (text);
- ret = (char *)xmalloc (l + 1);
- for (quoted = quote_char, p = text, r = ret; p && *p; p++)
- {
- /* Allow backslash-escaped characters to pass through unscathed. */
- if (*p == '\\')
- {
- /* Backslashes are preserved within single quotes. */
- if (quoted == '\'')
- *r++ = *p;
- /* Backslashes are preserved within double quotes unless the
- character is one that is defined to be escaped */
- else if (quoted == '"' && ((sh_syntaxtab[p[1]] & CBSDQUOTE) == 0))
- *r++ = *p;
-
- *r++ = *++p;
- if (*p == '\0')
- return ret; /* XXX - was break; */
- continue;
- }
- /* Close quote. */
- if (quoted && *p == quoted)
- {
- quoted = 0;
- continue;
- }
- /* Open quote. */
- if (quoted == 0 && (*p == '\'' || *p == '"'))
- {
- quoted = *p;
- continue;
- }
- *r++ = *p;
- }
- *r = '\0';
- return ret;
-}
-
-/* Quote characters that the readline completion code would treat as
- word break characters with backslashes. Pass backslash-quoted
- characters through without examination. */
-static char *
-quote_word_break_chars (text)
- char *text;
-{
- char *ret, *r, *s;
- int l;
-
- l = strlen (text);
- ret = (char *)xmalloc ((2 * l) + 1);
- for (s = text, r = ret; *s; s++)
- {
- /* Pass backslash-quoted characters through, including the backslash. */
- if (*s == '\\')
- {
- *r++ = '\\';
- *r++ = *++s;
- if (*s == '\0')
- break;
- continue;
- }
- /* OK, we have an unquoted character. Check its presence in
- rl_completer_word_break_characters. */
- if (mbschr (rl_completer_word_break_characters, *s))
- *r++ = '\\';
- /* XXX -- check for standalone tildes here and backslash-quote them */
- if (s == text && *s == '~' && file_exists (text))
- *r++ = '\\';
- *r++ = *s;
- }
- *r = '\0';
- return ret;
-}
-
-/* Quote a filename using double quotes, single quotes, or backslashes
- depending on the value of completion_quoting_style. If we're
- completing using backslashes, we need to quote some additional
- characters (those that readline treats as word breaks), so we call
- quote_word_break_chars on the result. This returns newly-allocated
- memory. */
-static char *
-bash_quote_filename (s, rtype, qcp)
- char *s;
- int rtype;
- char *qcp;
-{
- char *rtext, *mtext, *ret;
- int rlen, cs;
-
- rtext = (char *)NULL;
-
- /* If RTYPE == MULT_MATCH, it means that there is
- more than one match. In this case, we do not add
- the closing quote or attempt to perform tilde
- expansion. If RTYPE == SINGLE_MATCH, we try
- to perform tilde expansion, because single and double
- quotes inhibit tilde expansion by the shell. */
-
- cs = completion_quoting_style;
- /* Might need to modify the default completion style based on *qcp,
- since it's set to any user-provided opening quote. We also change
- to single-quoting if there is no user-provided opening quote and
- the word being completed contains newlines, since those are not
- quoted correctly using backslashes (a backslash-newline pair is
- special to the shell parser). */
- if (*qcp == '\0' && cs == COMPLETE_BSQUOTE && mbschr (s, '\n'))
- cs = COMPLETE_SQUOTE;
- else if (*qcp == '"')
- cs = COMPLETE_DQUOTE;
- else if (*qcp == '\'')
- cs = COMPLETE_SQUOTE;
-#if defined (BANG_HISTORY)
- else if (*qcp == '\0' && history_expansion && cs == COMPLETE_DQUOTE &&
- history_expansion_inhibited == 0 && mbschr (s, '!'))
- cs = COMPLETE_BSQUOTE;
-
- if (*qcp == '"' && history_expansion && cs == COMPLETE_DQUOTE &&
- history_expansion_inhibited == 0 && mbschr (s, '!'))
- {
- cs = COMPLETE_BSQUOTE;
- *qcp = '\0';
- }
-#endif
-
- /* Don't tilde-expand backslash-quoted filenames, since only single and
- double quotes inhibit tilde expansion. */
- mtext = s;
- if (mtext[0] == '~' && rtype == SINGLE_MATCH && cs != COMPLETE_BSQUOTE)
- mtext = bash_tilde_expand (s, 0);
-
- switch (cs)
- {
- case COMPLETE_DQUOTE:
- rtext = sh_double_quote (mtext);
- break;
- case COMPLETE_SQUOTE:
- rtext = sh_single_quote (mtext);
- break;
- case COMPLETE_BSQUOTE:
- rtext = sh_backslash_quote (mtext);
- break;
- }
-
- if (mtext != s)
- free (mtext);
-
- /* We may need to quote additional characters: those that readline treats
- as word breaks that are not quoted by backslash_quote. */
- if (rtext && cs == COMPLETE_BSQUOTE)
- {
- mtext = quote_word_break_chars (rtext);
- free (rtext);
- rtext = mtext;
- }
-
- /* Leave the opening quote intact. The readline completion code takes
- care of avoiding doubled opening quotes. */
- rlen = strlen (rtext);
- ret = (char *)xmalloc (rlen + 1);
- strcpy (ret, rtext);
-
- /* If there are multiple matches, cut off the closing quote. */
- if (rtype == MULT_MATCH && cs != COMPLETE_BSQUOTE)
- ret[rlen - 1] = '\0';
- free (rtext);
- return ret;
-}
-
-/* Support for binding readline key sequences to Unix commands. */
-static Keymap cmd_xmap;
-
-static int
-putx(c)
- int c;
-{
- int x;
-
- x = putc (c, rl_outstream);
- return (x);
-}
-
-static int
-bash_execute_unix_command (count, key)
- int count; /* ignored */
- int key;
-{
- Keymap ckmap; /* current keymap */
- Keymap xkmap; /* unix command executing keymap */
- register int i, r;
- intmax_t mi;
- sh_parser_state_t ps;
- char *cmd, *value, *l, *l1, *ce;
- SHELL_VAR *v;
- char ibuf[INT_STRLEN_BOUND(int) + 1];
-
- /* First, we need to find the right command to execute. This is tricky,
- because we might have already indirected into another keymap. */
- ckmap = rl_get_keymap ();
- if (ckmap != rl_executing_keymap)
- {
- /* bogus. we have to search. only handle one level of indirection. */
- for (i = 0; i < KEYMAP_SIZE; i++)
- {
- if (ckmap[i].type == ISKMAP && (Keymap)ckmap[i].function == rl_executing_keymap)
- break;
- }
- if (i < KEYMAP_SIZE)
- xkmap = (Keymap)cmd_xmap[i].function;
- else
- {
- rl_crlf ();
- internal_error (_("bash_execute_unix_command: cannot find keymap for command"));
- rl_forced_update_display ();
- return 1;
- }
- }
- else
- xkmap = cmd_xmap;
-
- cmd = (char *)xkmap[key].function;
-
- if (cmd == 0)
- {
- rl_ding ();
- return 1;
- }
-
- ce = rl_get_termcap ("ce");
- if (ce) /* clear current line */
- {
- fprintf (rl_outstream, "\r");
- tputs (ce, 1, putx);
- fflush (rl_outstream);
- }
- else
- rl_crlf (); /* move to a new line */
-
- v = bind_variable ("READLINE_LINE", rl_line_buffer, 0);
- if (v)
- VSETATTR (v, att_exported);
- l = v ? value_cell (v) : 0;
- value = inttostr (rl_point, ibuf, sizeof (ibuf));
- v = bind_int_variable ("READLINE_POINT", value);
- if (v)
- VSETATTR (v, att_exported);
- array_needs_making = 1;
-
- save_parser_state (&ps);
- r = parse_and_execute (cmd, "bash_execute_unix_command", SEVAL_NOHIST|SEVAL_NOFREE);
- restore_parser_state (&ps);
-
- v = find_variable ("READLINE_LINE");
- l1 = v ? value_cell (v) : 0;
- if (l1 != l)
- maybe_make_readline_line (value_cell (v));
- v = find_variable ("READLINE_POINT");
- if (v && legal_number (value_cell (v), &mi))
- {
- i = mi;
- if (i != rl_point)
- {
- rl_point = i;
- if (rl_point > rl_end)
- rl_point = rl_end;
- else if (rl_point < 0)
- rl_point = 0;
- }
- }
-
- unbind_variable ("READLINE_LINE");
- unbind_variable ("READLINE_POINT");
- array_needs_making = 1;
-
- /* and restore the readline buffer and display after command execution. */
- rl_forced_update_display ();
- return 0;
-}
-
-static void
-init_unix_command_map ()
-{
- cmd_xmap = rl_make_bare_keymap ();
-}
-
-static int
-isolate_sequence (string, ind, need_dquote, startp)
- char *string;
- int ind, need_dquote, *startp;
-{
- register int i;
- int c, passc, delim;
-
- for (i = ind; string[i] && whitespace (string[i]); i++)
- ;
- /* NEED_DQUOTE means that the first non-white character *must* be `"'. */
- if (need_dquote && string[i] != '"')
- {
- builtin_error (_("%s: first non-whitespace character is not `\"'"), string);
- return -1;
- }
-
- /* We can have delimited strings even if NEED_DQUOTE == 0, like the command
- string to bind the key sequence to. */
- delim = (string[i] == '"' || string[i] == '\'') ? string[i] : 0;
-
- if (startp)
- *startp = delim ? ++i : i;
-
- for (passc = 0; c = string[i]; i++)
- {
- if (passc)
- {
- passc = 0;
- continue;
- }
- if (c == '\\')
- {
- passc++;
- continue;
- }
- if (c == delim)
- break;
- }
-
- if (delim && string[i] != delim)
- {
- builtin_error (_("no closing `%c' in %s"), delim, string);
- return -1;
- }
-
- return i;
-}
-
-int
-bind_keyseq_to_unix_command (line)
- char *line;
-{
- Keymap kmap;
- char *kseq, *value;
- int i, kstart;
-
- if (cmd_xmap == 0)
- init_unix_command_map ();
-
- kmap = rl_get_keymap ();
-
- /* We duplicate some of the work done by rl_parse_and_bind here, but
- this code only has to handle `"keyseq": ["]command["]' and can
- generate an error for anything else. */
- i = isolate_sequence (line, 0, 1, &kstart);
- if (i < 0)
- return -1;
-
- /* Create the key sequence string to pass to rl_generic_bind */
- kseq = substring (line, kstart, i);
-
- for ( ; line[i] && line[i] != ':'; i++)
- ;
- if (line[i] != ':')
- {
- builtin_error (_("%s: missing colon separator"), line);
- return -1;
- }
-
- i = isolate_sequence (line, i + 1, 0, &kstart);
- if (i < 0)
- return -1;
-
- /* Create the value string containing the command to execute. */
- value = substring (line, kstart, i);
-
- /* Save the command to execute and the key sequence in the CMD_XMAP */
- rl_generic_bind (ISMACR, kseq, value, cmd_xmap);
-
- /* and bind the key sequence in the current keymap to a function that
- understands how to execute from CMD_XMAP */
- rl_bind_keyseq_in_map (kseq, bash_execute_unix_command, kmap);
-
- return 0;
-}
-
-/* Used by the programmable completion code. Complete TEXT as a filename,
- but return only directories as matches. Dequotes the filename before
- attempting to find matches. */
-char **
-bash_directory_completion_matches (text)
- const char *text;
-{
- char **m1;
- char *dfn;
- int qc;
-
- qc = rl_dispatching ? rl_completion_quote_character : 0;
- dfn = bash_dequote_filename ((char *)text, qc);
- m1 = rl_completion_matches (dfn, rl_filename_completion_function);
- free (dfn);
-
- if (m1 == 0 || m1[0] == 0)
- return m1;
- /* We don't bother recomputing the lcd of the matches, because it will just
- get thrown away by the programmable completion code and recomputed
- later. */
- (void)bash_ignore_filenames (m1);
- return m1;
-}
-
-char *
-bash_dequote_text (text)
- const char *text;
-{
- char *dtxt;
- int qc;
-
- qc = (text[0] == '"' || text[0] == '\'') ? text[0] : 0;
- dtxt = bash_dequote_filename ((char *)text, qc);
- return (dtxt);
-}
-
-static int
-bash_event_hook ()
-{
-itrace("bash_event_hook");
- CHECK_TERMSIG;
-}
-
-#endif /* READLINE */
+++ /dev/null
-/* bashline.h -- interface to the bash readline functions in bashline.c. */
-
-/* Copyright (C) 1993-2009 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined (_BASHLINE_H_)
-#define _BASHLINE_H_
-
-#include "stdc.h"
-
-extern int bash_readline_initialized;
-
-extern void posix_readline_initialize __P((int));
-extern void reset_completer_word_break_chars __P((void));
-extern int enable_hostname_completion __P((int));
-extern void initialize_readline __P((void));
-extern void bashline_reset __P((void));
-extern void bashline_reinitialize __P((void));
-extern int bash_re_edit __P((char *));
-
-extern int bind_keyseq_to_unix_command __P((char *));
-
-extern char **bash_default_completion __P((const char *, int, int, int, int));
-
-/* Used by programmable completion code. */
-extern char *command_word_completion_function __P((const char *, int));
-extern char *bash_groupname_completion_function __P((const char *, int));
-extern char *bash_servicename_completion_function __P((const char *, int));
-
-extern char **get_hostname_list __P((void));
-extern void clear_hostname_list __P((void));
-
-extern char **bash_directory_completion_matches __P((const char *));
-extern char *bash_dequote_text __P((const char *));
-
-#endif /* _BASHLINE_H_ */
+++ /dev/null
-/* braces.c -- code for doing word expansion in curly braces. */
-
-/* Copyright (C) 1987-2009 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/* Stuff in curly braces gets expanded before all other shell expansions. */
-
-#include "config.h"
-
-#if defined (BRACE_EXPANSION)
-
-#if defined (HAVE_UNISTD_H)
-# ifdef _MINIX
-# include <sys/types.h>
-# endif
-# include <unistd.h>
-#endif
-
-#include "bashansi.h"
-
-#if defined (SHELL)
-# include "shell.h"
-#endif /* SHELL */
-
-#include "general.h"
-#include "shmbutil.h"
-#include "chartypes.h"
-
-#define brace_whitespace(c) (!(c) || (c) == ' ' || (c) == '\t' || (c) == '\n')
-
-#define BRACE_SEQ_SPECIFIER ".."
-
-extern int asprintf __P((char **, const char *, ...)) __attribute__((__format__ (printf, 2, 3)));
-
-/* Basic idea:
-
- Segregate the text into 3 sections: preamble (stuff before an open brace),
- postamble (stuff after the matching close brace) and amble (stuff after
- preamble, and before postamble). Expand amble, and then tack on the
- expansions to preamble. Expand postamble, and tack on the expansions to
- the result so far.
- */
-
-/* The character which is used to separate arguments. */
-static const int brace_arg_separator = ',';
-
-#if defined (__P)
-static int brace_gobbler __P((char *, size_t, int *, int));
-static char **expand_amble __P((char *, size_t, int));
-static char **expand_seqterm __P((char *, size_t));
-static char **mkseq __P((intmax_t, intmax_t, int, int, int));
-static char **array_concat __P((char **, char **));
-#else
-static int brace_gobbler ();
-static char **expand_amble ();
-static char **expand_seqterm ();
-static char **mkseq();
-static char **array_concat ();
-#endif
-
-#if 0
-static void
-dump_result (a)
- char **a;
-{
- int i;
-
- for (i = 0; a[i]; i++)
- printf ("dump_result: a[%d] = -%s-\n", i, a[i]);
-}
-#endif
-
-/* Return an array of strings; the brace expansion of TEXT. */
-char **
-brace_expand (text)
- char *text;
-{
- register int start;
- size_t tlen;
- char *preamble, *postamble, *amble;
- size_t alen;
- char **tack, **result;
- int i, j, c, c1;
-
- DECLARE_MBSTATE;
-
- /* Find the text of the preamble. */
- tlen = strlen (text);
- i = 0;
-#if defined (CSH_BRACE_COMPAT)
- c = brace_gobbler (text, tlen, &i, '{'); /* } */
-#else
- /* Make sure that when we exit this loop, c == 0 or text[i] begins a
- valid brace expansion sequence. */
- do
- {
- c = brace_gobbler (text, tlen, &i, '{'); /* } */
- c1 = c;
- /* Verify that c begins a valid brace expansion word. If it doesn't, we
- go on. Loop stops when there are no more open braces in the word. */
- if (c)
- {
- start = j = i + 1; /* { */
- c = brace_gobbler (text, tlen, &j, '}');
- if (c == 0) /* it's not */
- {
- i++;
- c = c1;
- continue;
- }
- else /* it is */
- {
- c = c1;
- break;
- }
- }
- else
- break;
- }
- while (c);
-#endif /* !CSH_BRACE_COMPAT */
-
- preamble = (char *)xmalloc (i + 1);
- strncpy (preamble, text, i);
- preamble[i] = '\0';
-
- result = (char **)xmalloc (2 * sizeof (char *));
- result[0] = preamble;
- result[1] = (char *)NULL;
-
- /* Special case. If we never found an exciting character, then
- the preamble is all of the text, so just return that. */
- if (c != '{')
- return (result);
-
- /* Find the amble. This is the stuff inside this set of braces. */
- start = ++i;
- c = brace_gobbler (text, tlen, &i, '}');
-
- /* What if there isn't a matching close brace? */
- if (c == 0)
- {
-#if defined (NOTDEF)
- /* Well, if we found an unquoted BRACE_ARG_SEPARATOR between START
- and I, then this should be an error. Otherwise, it isn't. */
- j = start;
- while (j < i)
- {
- if (text[j] == '\\')
- {
- j++;
- ADVANCE_CHAR (text, tlen, j);
- continue;
- }
-
- if (text[j] == brace_arg_separator)
- { /* { */
- strvec_dispose (result);
- report_error ("no closing `%c' in %s", '}', text);
- throw_to_top_level ();
- }
- ADVANCE_CHAR (text, tlen, j);
- }
-#endif
- free (preamble); /* Same as result[0]; see initialization. */
- result[0] = savestring (text);
- return (result);
- }
-
-#if defined (SHELL)
- amble = substring (text, start, i);
- alen = i - start;
-#else
- amble = (char *)xmalloc (1 + (i - start));
- strncpy (amble, &text[start], (i - start));
- alen = i - start;
- amble[alen] = '\0';
-#endif
-
-#if defined (SHELL)
- INITIALIZE_MBSTATE;
-
- /* If the amble does not contain an unquoted BRACE_ARG_SEPARATOR, then
- just return without doing any expansion. */
- j = 0;
- while (amble[j])
- {
- if (amble[j] == '\\')
- {
- j++;
- ADVANCE_CHAR (amble, alen, j);
- continue;
- }
-
- if (amble[j] == brace_arg_separator)
- break;
-
- ADVANCE_CHAR (amble, alen, j);
- }
-
- if (amble[j] == 0)
- {
- tack = expand_seqterm (amble, alen);
- if (tack)
- goto add_tack;
- else
- {
- free (amble);
- free (preamble);
- result[0] = savestring (text);
- return (result);
- }
- }
-#endif /* SHELL */
-
- tack = expand_amble (amble, alen, 0);
-add_tack:
- result = array_concat (result, tack);
- free (amble);
- strvec_dispose (tack);
-
- postamble = text + i + 1;
-
- tack = brace_expand (postamble);
- result = array_concat (result, tack);
- strvec_dispose (tack);
-
- return (result);
-}
-
-/* Expand the text found inside of braces. We simply try to split the
- text at BRACE_ARG_SEPARATORs into separate strings. We then brace
- expand each slot which needs it, until there are no more slots which
- need it. */
-static char **
-expand_amble (text, tlen, flags)
- char *text;
- size_t tlen;
- int flags;
-{
- char **result, **partial;
- char *tem;
- int start, i, c;
-
- DECLARE_MBSTATE;
-
- result = (char **)NULL;
-
- start = i = 0;
- c = 1;
- while (c)
- {
- c = brace_gobbler (text, tlen, &i, brace_arg_separator);
-#if defined (SHELL)
- tem = substring (text, start, i);
-#else
- tem = (char *)xmalloc (1 + (i - start));
- strncpy (tem, &text[start], (i - start));
- tem[i- start] = '\0';
-#endif
-
- partial = brace_expand (tem);
-
- if (!result)
- result = partial;
- else
- {
- register int lr, lp, j;
-
- lr = strvec_len (result);
- lp = strvec_len (partial);
-
- result = strvec_resize (result, lp + lr + 1);
-
- for (j = 0; j < lp; j++)
- result[lr + j] = partial[j];
-
- result[lr + j] = (char *)NULL;
- free (partial);
- }
- free (tem);
- ADVANCE_CHAR (text, tlen, i);
- start = i;
- }
- return (result);
-}
-
-#define ST_BAD 0
-#define ST_INT 1
-#define ST_CHAR 2
-#define ST_ZINT 3
-
-static char **
-mkseq (start, end, incr, type, width)
- intmax_t start, end;
- int incr, type, width;
-{
- intmax_t n;
- int i;
- char **result, *t;
-
- i = abs (end - start) + 1;
- result = strvec_create (i + 1);
-
- if (incr == 0)
- incr = 1;
-
- if (start > end && incr > 0)
- incr = -incr;
- else if (start < end && incr < 0)
- incr = -incr;
-
- /* Make sure we go through the loop at least once, so {3..3} prints `3' */
- i = 0;
- n = start;
- do
- {
-#if defined (SHELL)
- QUIT; /* XXX - memory leak here */
-#endif
- if (type == ST_INT)
- result[i++] = itos (n);
- else if (type == ST_ZINT)
- {
- int len, arg;
- arg = n;
- len = asprintf (&t, "%0*d", width, arg);
- result[i++] = t;
- }
- else
- {
- t = (char *)xmalloc (2);
- t[0] = n;
- t[1] = '\0';
- result[i++] = t;
- }
- n += incr;
- if ((incr < 0 && n < end) || (incr > 0 && n > end))
- break;
- }
- while (1);
-
- result[i] = (char *)0;
- return (result);
-}
-
-static char **
-expand_seqterm (text, tlen)
- char *text;
- size_t tlen;
-{
- char *t, *lhs, *rhs;
- int i, lhs_t, rhs_t, incr, lhs_l, rhs_l, width;
- intmax_t lhs_v, rhs_v;
- intmax_t tl, tr;
- char **result, *ep, *oep;
-
- t = strstr (text, BRACE_SEQ_SPECIFIER);
- if (t == 0)
- return ((char **)NULL);
-
- lhs_l = t - text; /* index of start of BRACE_SEQ_SPECIFIER */
- lhs = substring (text, 0, lhs_l);
- rhs = substring (text, lhs_l + sizeof(BRACE_SEQ_SPECIFIER) - 1, tlen);
-
- if (lhs[0] == 0 || rhs[0] == 0)
- {
- free (lhs);
- free (rhs);
- return ((char **)NULL);
- }
-
- /* Now figure out whether LHS and RHS are integers or letters. Both
- sides have to match. */
- lhs_t = (legal_number (lhs, &tl)) ? ST_INT :
- ((ISALPHA (lhs[0]) && lhs[1] == 0) ? ST_CHAR : ST_BAD);
-
- /* Decide on rhs and whether or not it looks like the user specified
- an increment */
- ep = 0;
- if (ISDIGIT (rhs[0]) || ((rhs[0] == '+' || rhs[0] == '-') && ISDIGIT (rhs[1])))
- {
- rhs_t = ST_INT;
- tr = strtoimax (rhs, &ep, 10);
- if (ep && *ep != 0 && *ep != '.')
- rhs_t = ST_BAD; /* invalid */
- }
- else if (ISALPHA (rhs[0]) && (rhs[1] == 0 || rhs[1] == '.'))
- {
- rhs_t = ST_CHAR;
- ep = rhs + 1;
- }
- else
- {
- rhs_t = ST_BAD;
- ep = 0;
- }
-
- incr = 1;
- if (rhs_t != ST_BAD)
- {
- oep = ep;
- if (ep && *ep == '.' && ep[1] == '.' && ep[2])
- incr = strtoimax (ep + 2, &ep, 10);
- if (*ep != 0)
- rhs_t = ST_BAD; /* invalid incr */
- tlen -= ep - oep;
- }
-
- if (lhs_t != rhs_t || lhs_t == ST_BAD || rhs_t == ST_BAD)
- {
- free (lhs);
- free (rhs);
- return ((char **)NULL);
- }
-
- /* OK, we have something. It's either a sequence of integers, ascending
- or descending, or a sequence or letters, ditto. Generate the sequence,
- put it into a string vector, and return it. */
-
- if (lhs_t == ST_CHAR)
- {
- lhs_v = (unsigned char)lhs[0];
- rhs_v = (unsigned char)rhs[0];
- width = 1;
- }
- else
- {
- lhs_v = tl; /* integer truncation */
- rhs_v = tr;
-
- /* Decide whether or not the terms need zero-padding */
- rhs_l = tlen - lhs_l - sizeof (BRACE_SEQ_SPECIFIER) + 1;
- width = 0;
- if (lhs_l > 1 && lhs[0] == '0')
- width = lhs_l, lhs_t = ST_ZINT;
- if (lhs_l > 2 && lhs[0] == '-' && lhs[1] == '0')
- width = lhs_l, lhs_t = ST_ZINT;
- if (rhs_l > 1 && rhs[0] == '0' && width < rhs_l)
- width = rhs_l, lhs_t = ST_ZINT;
- if (rhs_l > 2 && rhs[0] == '-' && rhs[1] == '0' && width < rhs_l)
- width = rhs_l, lhs_t = ST_ZINT;
-
- if (width < lhs_l && lhs_t == ST_ZINT)
- width = lhs_l;
- if (width < rhs_l && lhs_t == ST_ZINT)
- width = rhs_l;
- }
-
- result = mkseq (lhs_v, rhs_v, incr, lhs_t, width);
-
- free (lhs);
- free (rhs);
-
- return (result);
-}
-
-/* Start at INDEX, and skip characters in TEXT. Set INDEX to the
- index of the character matching SATISFY. This understands about
- quoting. Return the character that caused us to stop searching;
- this is either the same as SATISFY, or 0. */
-/* If SATISFY is `}', we are looking for a brace expression, so we
- should enforce the rules that govern valid brace expansions:
- 1) to count as an arg separator, a comma or `..' has to be outside
- an inner set of braces.
-*/
-static int
-brace_gobbler (text, tlen, indx, satisfy)
- char *text;
- size_t tlen;
- int *indx;
- int satisfy;
-{
- register int i, c, quoted, level, commas, pass_next;
-#if defined (SHELL)
- int si;
- char *t;
-#endif
- DECLARE_MBSTATE;
-
- level = quoted = pass_next = 0;
-#if defined (CSH_BRACE_COMPAT)
- commas = 1;
-#else
- commas = (satisfy == '}') ? 0 : 1;
-#endif
-
- i = *indx;
- while (c = text[i])
- {
- if (pass_next)
- {
- pass_next = 0;
- ADVANCE_CHAR (text, tlen, i);
- continue;
- }
-
- /* A backslash escapes the next character. This allows backslash to
- escape the quote character in a double-quoted string. */
- if (c == '\\' && (quoted == 0 || quoted == '"' || quoted == '`'))
- {
- pass_next = 1;
- i++;
- continue;
- }
-
-#if defined (SHELL)
- /* If compiling for the shell, treat ${...} like \{...} */
- if (c == '$' && text[i+1] == '{' && quoted != '\'') /* } */
- {
- pass_next = 1;
- i++;
- if (quoted == 0)
- level++;
- continue;
- }
-#endif
-
- if (quoted)
- {
- if (c == quoted)
- quoted = 0;
-#if defined (SHELL)
- if (quoted == '"' && c == '$' && text[i+1] == '(') /*)*/
- goto comsub;
-#endif
- ADVANCE_CHAR (text, tlen, i);
- continue;
- }
-
- if (c == '"' || c == '\'' || c == '`')
- {
- quoted = c;
- i++;
- continue;
- }
-
-#if defined (SHELL)
- /* Pass new-style command and process substitutions through unchanged. */
- if ((c == '$' || c == '<' || c == '>') && text[i+1] == '(') /* ) */
- {
-comsub:
- si = i + 2;
- t = extract_command_subst (text, &si, 0);
- i = si;
- free (t);
- i++;
- continue;
- }
-#endif
-
- if (c == satisfy && level == 0 && quoted == 0 && commas > 0)
- {
- /* We ignore an open brace surrounded by whitespace, and also
- an open brace followed immediately by a close brace preceded
- by whitespace. */
- if (c == '{' &&
- ((!i || brace_whitespace (text[i - 1])) &&
- (brace_whitespace (text[i + 1]) || text[i + 1] == '}')))
- {
- i++;
- continue;
- }
-
- break;
- }
-
- if (c == '{')
- level++;
- else if (c == '}' && level)
- level--;
-#if !defined (CSH_BRACE_COMPAT)
- else if (satisfy == '}' && c == brace_arg_separator && level == 0)
- commas++;
- else if (satisfy == '}' && STREQN (text+i, BRACE_SEQ_SPECIFIER, 2) &&
- text[i+2] != satisfy && level == 0)
- commas++;
-#endif
-
- ADVANCE_CHAR (text, tlen, i);
- }
-
- *indx = i;
- return (c);
-}
-
-/* Return a new array of strings which is the result of appending each
- string in ARR2 to each string in ARR1. The resultant array is
- len (arr1) * len (arr2) long. For convenience, ARR1 (and its contents)
- are free ()'ed. ARR1 can be NULL, in that case, a new version of ARR2
- is returned. */
-static char **
-array_concat (arr1, arr2)
- char **arr1, **arr2;
-{
- register int i, j, len, len1, len2;
- register char **result;
-
- if (arr1 == 0)
- return (strvec_copy (arr2));
-
- if (arr2 == 0)
- return (strvec_copy (arr1));
-
- len1 = strvec_len (arr1);
- len2 = strvec_len (arr2);
-
- result = (char **)xmalloc ((1 + (len1 * len2)) * sizeof (char *));
-
- len = 0;
- for (i = 0; i < len1; i++)
- {
- int strlen_1 = strlen (arr1[i]);
-
- for (j = 0; j < len2; j++)
- {
- result[len] = (char *)xmalloc (1 + strlen_1 + strlen (arr2[j]));
- strcpy (result[len], arr1[i]);
- strcpy (result[len] + strlen_1, arr2[j]);
- len++;
- }
- free (arr1[i]);
- }
- free (arr1);
-
- result[len] = (char *)NULL;
- return (result);
-}
-
-#if defined (TEST)
-#include <stdio.h>
-
-fatal_error (format, arg1, arg2)
- char *format, *arg1, *arg2;
-{
- report_error (format, arg1, arg2);
- exit (1);
-}
-
-report_error (format, arg1, arg2)
- char *format, *arg1, *arg2;
-{
- fprintf (stderr, format, arg1, arg2);
- fprintf (stderr, "\n");
-}
-
-main ()
-{
- char example[256];
-
- for (;;)
- {
- char **result;
- int i;
-
- fprintf (stderr, "brace_expand> ");
-
- if ((!fgets (example, 256, stdin)) ||
- (strncmp (example, "quit", 4) == 0))
- break;
-
- if (strlen (example))
- example[strlen (example) - 1] = '\0';
-
- result = brace_expand (example);
-
- for (i = 0; result[i]; i++)
- printf ("%s\n", result[i]);
-
- free_array (result);
- }
-}
-\f
-/*
- * Local variables:
- * compile-command: "gcc -g -Bstatic -DTEST -o brace_expand braces.c general.o"
- * end:
- */
-
-#endif /* TEST */
-#endif /* BRACE_EXPANSION */
+++ /dev/null
-This file is printf.def, from which is created printf.c.
-It implements the builtin "printf" in Bash.
-
-Copyright (C) 1997-2010 Free Software Foundation, Inc.
-
-This file is part of GNU Bash, the Bourne Again SHell.
-
-Bash is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-Bash is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with Bash. If not, see <http://www.gnu.org/licenses/>.
-
-$PRODUCES printf.c
-
-$BUILTIN printf
-$FUNCTION printf_builtin
-$SHORT_DOC printf [-v var] format [arguments]
-Formats and prints ARGUMENTS under control of the FORMAT.
-
-Options:
- -v var assign the output to shell variable VAR rather than
- display it on the standard output
-
-FORMAT is a character string which contains three types of objects: plain
-characters, which are simply copied to standard output; character escape
-sequences, which are converted and copied to the standard output; and
-format specifications, each of which causes printing of the next successive
-argument.
-
-In addition to the standard format specifications described in printf(1)
-and printf(3), printf interprets:
-
- %b expand backslash escape sequences in the corresponding argument
- %q quote the argument in a way that can be reused as shell input
- %(fmt)T output the date-time string resulting from using FMT as a format
- string for strftime(3)
-
-Exit Status:
-Returns success unless an invalid option is given or a write or assignment
-error occurs.
-$END
-
-#include <config.h>
-
-#include "../bashtypes.h"
-
-#include <errno.h>
-#if defined (HAVE_LIMITS_H)
-# include <limits.h>
-#else
- /* Assume 32-bit ints. */
-# define INT_MAX 2147483647
-# define INT_MIN (-2147483647-1)
-#endif
-
-#if defined (PREFER_STDARG)
-# include <stdarg.h>
-#else
-# include <varargs.h>
-#endif
-
-#include <stdio.h>
-#include <chartypes.h>
-
-#ifdef HAVE_INTTYPES_H
-# include <inttypes.h>
-#endif
-
-#include "posixtime.h"
-#include "../bashansi.h"
-#include "../bashintl.h"
-
-#define NEED_STRFTIME_DECL
-
-#include "../shell.h"
-#include "shmbutil.h"
-#include "stdc.h"
-#include "bashgetopt.h"
-#include "common.h"
-
-#if defined (PRI_MACROS_BROKEN)
-# undef PRIdMAX
-#endif
-
-#if !defined (PRIdMAX)
-# if HAVE_LONG_LONG
-# define PRIdMAX "lld"
-# else
-# define PRIdMAX "ld"
-# endif
-#endif
-
-#if !defined (errno)
-extern int errno;
-#endif
-
-#define PC(c) \
- do { \
- char b[2]; \
- tw++; \
- b[0] = c; b[1] = '\0'; \
- if (vflag) \
- vbadd (b, 1); \
- else \
- putchar (c); \
- } while (0)
-
-#define PF(f, func) \
- do { \
- int nw; \
- clearerr (stdout); \
- if (have_fieldwidth && have_precision) \
- nw = vflag ? vbprintf (f, fieldwidth, precision, func) : printf (f, fieldwidth, precision, func); \
- else if (have_fieldwidth) \
- nw = vflag ? vbprintf (f, fieldwidth, func) : printf (f, fieldwidth, func); \
- else if (have_precision) \
- nw = vflag ? vbprintf (f, precision, func) : printf (f, precision, func); \
- else \
- nw = vflag ? vbprintf (f, func) : printf (f, func); \
- tw += nw; \
- if (ferror (stdout)) \
- { \
- sh_wrerror (); \
- clearerr (stdout); \
- return (EXECUTION_FAILURE); \
- } \
- } while (0)
-
-/* We free the buffer used by mklong() if it's `too big'. */
-#define PRETURN(value) \
- do \
- { \
- if (vflag) \
- { \
- bind_printf_variable (vname, vbuf, 0); \
- stupidly_hack_special_variables (vname); \
- } \
- if (conv_bufsize > 4096 ) \
- { \
- free (conv_buf); \
- conv_bufsize = 0; \
- conv_buf = 0; \
- } \
- if (vbsize > 4096) \
- { \
- free (vbuf); \
- vbsize = 0; \
- vbuf = 0; \
- } \
- else if (vbuf) \
- vbuf[0] = 0; \
- terminate_immediately--; \
- fflush (stdout); \
- if (ferror (stdout)) \
- { \
- sh_wrerror (); \
- clearerr (stdout); \
- return (EXECUTION_FAILURE); \
- } \
- return (value); \
- } \
- while (0)
-
-#define SKIP1 "#'-+ 0"
-#define LENMODS "hjlLtz"
-
-extern time_t shell_start_time;
-
-#if !HAVE_ASPRINTF
-extern int asprintf __P((char **, const char *, ...)) __attribute__((__format__ (printf, 2, 3)));
-#endif
-
-#if !HAVE_VSNPRINTF
-extern int vsnprintf __P((char *, size_t, const char *, va_list)) __attribute__((__format__ (printf, 3, 0)));
-#endif
-
-static void printf_erange __P((char *));
-static int printstr __P((char *, char *, int, int, int));
-static int tescape __P((char *, char *, int *, int *));
-static char *bexpand __P((char *, int, int *, int *));
-static char *vbadd __P((char *, int));
-static int vbprintf __P((const char *, ...)) __attribute__((__format__ (printf, 1, 2)));
-static char *mklong __P((char *, char *, size_t));
-static int getchr __P((void));
-static char *getstr __P((void));
-static int getint __P((void));
-static intmax_t getintmax __P((void));
-static uintmax_t getuintmax __P((void));
-static SHELL_VAR *bind_printf_variable __P((char *, char *, int));
-
-#if defined (HAVE_LONG_DOUBLE) && HAVE_DECL_STRTOLD && !defined(STRTOLD_BROKEN)
-typedef long double floatmax_t;
-# define FLOATMAX_CONV "L"
-# define strtofltmax strtold
-#else
-typedef double floatmax_t;
-# define FLOATMAX_CONV ""
-# define strtofltmax strtod
-#endif
-static floatmax_t getfloatmax __P((void));
-
-static intmax_t asciicode __P((void));
-
-static WORD_LIST *garglist;
-static int retval;
-static int conversion_error;
-
-/* printf -v var support */
-static int vflag = 0;
-static char *vbuf, *vname;
-static size_t vbsize;
-static int vblen;
-
-static intmax_t tw;
-
-static char *conv_buf;
-static size_t conv_bufsize;
-
-int
-printf_builtin (list)
- WORD_LIST *list;
-{
- int ch, fieldwidth, precision;
- int have_fieldwidth, have_precision;
- char convch, thisch, nextch, *format, *modstart, *fmt, *start;
-#if defined (HANDLE_MULTIBYTE)
- char mbch[25]; /* 25 > MB_LEN_MAX, plus can handle 4-byte UTF-8 and large Unicode characters*/
- int mbind, mblen;
-#endif
-
- conversion_error = 0;
- retval = EXECUTION_SUCCESS;
-
- vflag = 0;
-
- reset_internal_getopt ();
- while ((ch = internal_getopt (list, "v:")) != -1)
- {
- switch (ch)
- {
- case 'v':
- vname = list_optarg;
-#if defined (ARRAY_VARS)
- if (legal_identifier (vname) || valid_array_reference (vname))
-#else
- if (legal_identifier (vname))
-#endif
- {
- vflag = 1;
- vblen = 0;
- if (vbuf)
- vbuf[0] = 0;
- }
- else
- {
- sh_invalidid (vname);
- return (EX_USAGE);
- }
- break;
- default:
- builtin_usage ();
- return (EX_USAGE);
- }
- }
- list = loptend; /* skip over possible `--' */
-
- if (list == 0)
- {
- builtin_usage ();
- return (EX_USAGE);
- }
-
- if (list->word->word == 0 || list->word->word[0] == '\0')
- return (EXECUTION_SUCCESS);
-
- format = list->word->word;
- tw = 0;
-
- garglist = list->next;
-
- /* If the format string is empty after preprocessing, return immediately. */
- if (format == 0 || *format == 0)
- return (EXECUTION_SUCCESS);
-
- terminate_immediately++;
-
- /* Basic algorithm is to scan the format string for conversion
- specifications -- once one is found, find out if the field
- width or precision is a '*'; if it is, gather up value. Note,
- format strings are reused as necessary to use up the provided
- arguments, arguments of zero/null string are provided to use
- up the format string. */
- do
- {
- tw = 0;
- /* find next format specification */
- for (fmt = format; *fmt; fmt++)
- {
- precision = fieldwidth = 0;
- have_fieldwidth = have_precision = 0;
-
- if (*fmt == '\\')
- {
- fmt++;
- /* A NULL third argument to tescape means to bypass the
- special processing for arguments to %b. */
-#if defined (HANDLE_MULTIBYTE)
- /* Accommodate possible use of \u or \U, which can result in
- multibyte characters */
- memset (mbch, '\0', sizeof (mbch));
- fmt += tescape (fmt, mbch, &mblen, (int *)NULL);
- for (mbind = 0; mbind < mblen; mbind++)
- PC (mbch[mbind]);
-#else
- fmt += tescape (fmt, &nextch, (int *)NULL, (int *)NULL);
- PC (nextch);
-#endif
- fmt--; /* for loop will increment it for us again */
- continue;
- }
-
- if (*fmt != '%')
- {
- PC (*fmt);
- continue;
- }
-
- /* ASSERT(*fmt == '%') */
- start = fmt++;
-
- if (*fmt == '%') /* %% prints a % */
- {
- PC ('%');
- continue;
- }
-
- /* found format specification, skip to field width */
- for (; *fmt && strchr(SKIP1, *fmt); ++fmt)
- ;
-
- /* Skip optional field width. */
- if (*fmt == '*')
- {
- fmt++;
- have_fieldwidth = 1;
- fieldwidth = getint ();
- }
- else
- while (DIGIT (*fmt))
- fmt++;
-
- /* Skip optional '.' and precision */
- if (*fmt == '.')
- {
- ++fmt;
- if (*fmt == '*')
- {
- fmt++;
- have_precision = 1;
- precision = getint ();
- }
- else
- {
- /* Negative precisions are allowed but treated as if the
- precision were missing; I would like to allow a leading
- `+' in the precision number as an extension, but lots
- of asprintf/fprintf implementations get this wrong. */
-#if 0
- if (*fmt == '-' || *fmt == '+')
-#else
- if (*fmt == '-')
-#endif
- fmt++;
- while (DIGIT (*fmt))
- fmt++;
- }
- }
-
- /* skip possible format modifiers */
- modstart = fmt;
- while (*fmt && strchr (LENMODS, *fmt))
- fmt++;
-
- if (*fmt == 0)
- {
- builtin_error (_("`%s': missing format character"), start);
- PRETURN (EXECUTION_FAILURE);
- }
-
- convch = *fmt;
- thisch = modstart[0];
- nextch = modstart[1];
- modstart[0] = convch;
- modstart[1] = '\0';
-
- switch(convch)
- {
- case 'c':
- {
- char p;
-
- p = getchr ();
- PF(start, p);
- break;
- }
-
- case 's':
- {
- char *p;
-
- p = getstr ();
- PF(start, p);
- break;
- }
-
- case '(':
- {
- char *timefmt, timebuf[128], *t;
- int n;
- intmax_t arg;
- time_t secs;
- struct tm *tm;
-
- modstart[1] = nextch; /* restore char after left paren */
- timefmt = xmalloc (strlen (fmt) + 3);
- fmt++; /* skip over left paren */
- for (t = timefmt, n = 1; *fmt; )
- {
- if (*fmt == '(')
- n++;
- else if (*fmt == ')')
- n--;
- if (n == 0)
- break;
- *t++ = *fmt++;
- }
- *t = '\0';
- if (*++fmt != 'T')
- {
- builtin_warning (_("`%c': invalid time format specification"), *fmt);
- fmt = start;
- free (timefmt);
- PC (*fmt);
- continue;
- }
- if (timefmt[0] == '\0')
- {
- timefmt[0] = '%';
- timefmt[1] = 'X'; /* locale-specific current time - should we use `+'? */
- timefmt[2] = '\0';
- }
- /* argument is seconds since the epoch with special -1 and -2 */
- arg = getintmax ();
- if (arg == -1)
- secs = NOW; /* roughly date +%s */
- else if (arg == -2)
- secs = shell_start_time; /* roughly $SECONDS */
- else
- secs = arg;
-#if defined (HAVE_TZSET)
- if (chkexport ("TZ"))
- sv_tz ("TZ"); /* XXX -- just make sure */
-#endif
- tm = localtime (&secs);
- n = strftime (timebuf, sizeof (timebuf), timefmt, tm);
- free (timefmt);
- if (n == 0)
- timebuf[0] = '\0';
- else
- timebuf[sizeof(timebuf) - 1] = '\0';
- /* convert to %s format that preserves fieldwidth and precision */
- modstart[0] = 's';
- modstart[1] = '\0';
- n = printstr (start, timebuf, strlen (timebuf), fieldwidth, precision); /* XXX - %s for now */
- if (n < 0)
- {
- sh_wrerror ();
- clearerr (stdout);
- PRETURN (EXECUTION_FAILURE);
- }
- break;
- }
-
- case 'n':
- {
- char *var;
-
- var = getstr ();
- if (var && *var)
- {
- if (legal_identifier (var))
- bind_var_to_int (var, tw);
- else
- {
- sh_invalidid (var);
- PRETURN (EXECUTION_FAILURE);
- }
- }
- break;
- }
-
- case 'b': /* expand escapes in argument */
- {
- char *p, *xp;
- int rlen, r;
-
- p = getstr ();
- ch = rlen = r = 0;
- xp = bexpand (p, strlen (p), &ch, &rlen);
-
- if (xp)
- {
- /* Have to use printstr because of possible NUL bytes
- in XP -- printf does not handle that well. */
- r = printstr (start, xp, rlen, fieldwidth, precision);
- if (r < 0)
- {
- sh_wrerror ();
- clearerr (stdout);
- retval = EXECUTION_FAILURE;
- }
- free (xp);
- }
-
- if (ch || r < 0)
- PRETURN (retval);
- break;
- }
-
- case 'q': /* print with shell quoting */
- {
- char *p, *xp;
- int r;
-
- r = 0;
- p = getstr ();
- if (p && *p == 0) /* XXX - getstr never returns null */
- xp = savestring ("''");
- else if (ansic_shouldquote (p))
- xp = ansic_quote (p, 0, (int *)0);
- else
- xp = sh_backslash_quote (p);
- if (xp)
- {
- /* Use printstr to get fieldwidth and precision right. */
- r = printstr (start, xp, strlen (xp), fieldwidth, precision);
- if (r < 0)
- {
- sh_wrerror ();
- clearerr (stdout);
- }
- free (xp);
- }
-
- if (r < 0)
- PRETURN (EXECUTION_FAILURE);
- break;
- }
-
- case 'd':
- case 'i':
- {
- char *f;
- long p;
- intmax_t pp;
-
- p = pp = getintmax ();
- if (p != pp)
- {
- f = mklong (start, PRIdMAX, sizeof (PRIdMAX) - 2);
- PF (f, pp);
- }
- else
- {
- /* Optimize the common case where the integer fits
- in "long". This also works around some long
- long and/or intmax_t library bugs in the common
- case, e.g. glibc 2.2 x86. */
- f = mklong (start, "l", 1);
- PF (f, p);
- }
- break;
- }
-
- case 'o':
- case 'u':
- case 'x':
- case 'X':
- {
- char *f;
- unsigned long p;
- uintmax_t pp;
-
- p = pp = getuintmax ();
- if (p != pp)
- {
- f = mklong (start, PRIdMAX, sizeof (PRIdMAX) - 2);
- PF (f, pp);
- }
- else
- {
- f = mklong (start, "l", 1);
- PF (f, p);
- }
- break;
- }
-
- case 'e':
- case 'E':
- case 'f':
- case 'F':
- case 'g':
- case 'G':
-#if defined (HAVE_PRINTF_A_FORMAT)
- case 'a':
- case 'A':
-#endif
- {
- char *f;
- floatmax_t p;
-
- p = getfloatmax ();
- f = mklong (start, FLOATMAX_CONV, sizeof(FLOATMAX_CONV) - 1);
- PF (f, p);
- break;
- }
-
- /* We don't output unrecognized format characters; we print an
- error message and return a failure exit status. */
- default:
- builtin_error (_("`%c': invalid format character"), convch);
- PRETURN (EXECUTION_FAILURE);
- }
-
- modstart[0] = thisch;
- modstart[1] = nextch;
- }
-
- if (ferror (stdout))
- {
- sh_wrerror ();
- clearerr (stdout);
- PRETURN (EXECUTION_FAILURE);
- }
- }
- while (garglist && garglist != list->next);
-
- if (conversion_error)
- retval = EXECUTION_FAILURE;
-
- PRETURN (retval);
-}
-
-static void
-printf_erange (s)
- char *s;
-{
- builtin_error (_("warning: %s: %s"), s, strerror(ERANGE));
-}
-
-/* We duplicate a lot of what printf(3) does here. */
-static int
-printstr (fmt, string, len, fieldwidth, precision)
- char *fmt; /* format */
- char *string; /* expanded string argument */
- int len; /* length of expanded string */
- int fieldwidth; /* argument for width of `*' */
- int precision; /* argument for precision of `*' */
-{
-#if 0
- char *s;
-#endif
- int padlen, nc, ljust, i;
- int fw, pr; /* fieldwidth and precision */
-
-#if 0
- if (string == 0 || *string == '\0')
-#else
- if (string == 0 || len == 0)
-#endif
- return 0;
-
-#if 0
- s = fmt;
-#endif
- if (*fmt == '%')
- fmt++;
-
- ljust = fw = 0;
- pr = -1;
-
- /* skip flags */
- while (strchr (SKIP1, *fmt))
- {
- if (*fmt == '-')
- ljust = 1;
- fmt++;
- }
-
- /* get fieldwidth, if present */
- if (*fmt == '*')
- {
- fmt++;
- fw = fieldwidth;
- if (fw < 0)
- {
- fw = -fw;
- ljust = 1;
- }
- }
- else if (DIGIT (*fmt))
- {
- fw = *fmt++ - '0';
- while (DIGIT (*fmt))
- fw = (fw * 10) + (*fmt++ - '0');
- }
-
- /* get precision, if present */
- if (*fmt == '.')
- {
- fmt++;
- if (*fmt == '*')
- {
- fmt++;
- pr = precision;
- }
- else if (DIGIT (*fmt))
- {
- pr = *fmt++ - '0';
- while (DIGIT (*fmt))
- pr = (pr * 10) + (*fmt++ - '0');
- }
- }
-
-#if 0
- /* If we remove this, get rid of `s'. */
- if (*fmt != 'b' && *fmt != 'q')
- {
- internal_error ("format parsing problem: %s", s);
- fw = pr = 0;
- }
-#endif
-
- /* chars from string to print */
- nc = (pr >= 0 && pr <= len) ? pr : len;
-
- padlen = fw - nc;
- if (padlen < 0)
- padlen = 0;
- if (ljust)
- padlen = -padlen;
-
- /* leading pad characters */
- for (; padlen > 0; padlen--)
- PC (' ');
-
- /* output NC characters from STRING */
- for (i = 0; i < nc; i++)
- PC (string[i]);
-
- /* output any necessary trailing padding */
- for (; padlen < 0; padlen++)
- PC (' ');
-
- return (ferror (stdout) ? -1 : 0);
-}
-
-/* Convert STRING by expanding the escape sequences specified by the
- POSIX standard for printf's `%b' format string. If SAWC is non-null,
- perform the processing appropriate for %b arguments. In particular,
- recognize `\c' and use that as a string terminator. If we see \c, set
- *SAWC to 1 before returning. LEN is the length of STRING. */
-
-/* Translate a single backslash-escape sequence starting at ESTART (the
- character after the backslash) and return the number of characters
- consumed by the sequence. CP is the place to return the translated
- value. *SAWC is set to 1 if the escape sequence was \c, since that means
- to short-circuit the rest of the processing. If SAWC is null, we don't
- do the \c short-circuiting, and \c is treated as an unrecognized escape
- sequence; we also bypass the other processing specific to %b arguments. */
-static int
-tescape (estart, cp, lenp, sawc)
- char *estart;
- char *cp;
- int *lenp, *sawc;
-{
- register char *p;
- int temp, c, evalue;
- unsigned long uvalue;
-
- p = estart;
- if (lenp)
- *lenp = 1;
-
- switch (c = *p++)
- {
-#if defined (__STDC__)
- case 'a': *cp = '\a'; break;
-#else
- case 'a': *cp = '\007'; break;
-#endif
-
- case 'b': *cp = '\b'; break;
-
- case 'e':
- case 'E': *cp = '\033'; break; /* ESC -- non-ANSI */
-
- case 'f': *cp = '\f'; break;
-
- case 'n': *cp = '\n'; break;
-
- case 'r': *cp = '\r'; break;
-
- case 't': *cp = '\t'; break;
-
- case 'v': *cp = '\v'; break;
-
- /* The octal escape sequences are `\0' followed by up to three octal
- digits (if SAWC), or `\' followed by up to three octal digits (if
- !SAWC). As an extension, we allow the latter form even if SAWC. */
- case '0': case '1': case '2': case '3':
- case '4': case '5': case '6': case '7':
- evalue = OCTVALUE (c);
- for (temp = 2 + (!evalue && !!sawc); ISOCTAL (*p) && temp--; p++)
- evalue = (evalue * 8) + OCTVALUE (*p);
- *cp = evalue & 0xFF;
- break;
-
- /* And, as another extension, we allow \xNN, where each N is a
- hex digit. */
- case 'x':
- for (temp = 2, evalue = 0; ISXDIGIT ((unsigned char)*p) && temp--; p++)
- evalue = (evalue * 16) + HEXVALUE (*p);
- if (p == estart + 1)
- {
- builtin_error (_("missing hex digit for \\x"));
- *cp = '\\';
- return 0;
- }
- *cp = evalue & 0xFF;
- break;
-
-#if defined (HANDLE_MULTIBYTE)
- case 'u':
- case 'U':
- temp = (c == 'u') ? 4 : 8; /* \uNNNN \UNNNNNNNN */
- for (uvalue = 0; ISXDIGIT ((unsigned char)*p) && temp--; p++)
- uvalue = (uvalue * 16) + HEXVALUE (*p);
- if (p == estart + 1)
- {
- builtin_error (_("missing unicode digit for \\%c"), c);
- *cp = '\\';
- return 0;
- }
- if (uvalue <= UCHAR_MAX)
- *cp = uvalue;
- else
- {
- temp = u32cconv (uvalue, cp);
- cp[temp] = '\0';
- if (lenp)
- *lenp = temp;
- }
- break;
-#endif
-
- case '\\': /* \\ -> \ */
- *cp = c;
- break;
-
- /* SAWC == 0 means that \', \", and \? are recognized as escape
- sequences, though the only processing performed is backslash
- removal. */
- case '\'': case '"': case '?':
- if (!sawc)
- *cp = c;
- else
- {
- *cp = '\\';
- return 0;
- }
- break;
-
- case 'c':
- if (sawc)
- {
- *sawc = 1;
- break;
- }
- /* other backslash escapes are passed through unaltered */
- default:
- *cp = '\\';
- return 0;
- }
- return (p - estart);
-}
-
-static char *
-bexpand (string, len, sawc, lenp)
- char *string;
- int len, *sawc, *lenp;
-{
- int temp;
- char *ret, *r, *s, c;
-#if defined (HANDLE_MULTIBYTE)
- char mbch[25];
- int mbind, mblen;
-#endif
-
- if (string == 0 || len == 0)
- {
- if (sawc)
- *sawc = 0;
- if (lenp)
- *lenp = 0;
- return ((char *)NULL);
- }
-
- ret = (char *)xmalloc (len + 1);
- for (r = ret, s = string; s && *s; )
- {
- c = *s++;
- if (c != '\\' || *s == '\0')
- {
- *r++ = c;
- continue;
- }
- temp = 0;
-#if defined (HANDLE_MULTIBYTE)
- memset (mbch, '\0', sizeof (mbch));
- s += tescape (s, mbch, &mblen, &temp);
-#else
- s += tescape (s, &c, (int *)NULL, &temp);
-#endif
- if (temp)
- {
- if (sawc)
- *sawc = 1;
- break;
- }
-
-#if defined (HANDLE_MULTIBYTE)
- for (mbind = 0; mbind < mblen; mbind++)
- *r++ = mbch[mbind];
-#else
- *r++ = c;
-#endif
- }
-
- *r = '\0';
- if (lenp)
- *lenp = r - ret;
- return ret;
-}
-
-static char *
-vbadd (buf, blen)
- char *buf;
- int blen;
-{
- size_t nlen;
-
- nlen = vblen + blen + 1;
- if (nlen >= vbsize)
- {
- vbsize = ((nlen + 63) >> 6) << 6;
- vbuf = (char *)xrealloc (vbuf, vbsize);
- }
-
- if (blen == 1)
- vbuf[vblen++] = buf[0];
- else if (blen > 1)
- {
- FASTCOPY (buf, vbuf + vblen, blen);
- vblen += blen;
- }
- vbuf[vblen] = '\0';
-
-#ifdef DEBUG
- if (strlen (vbuf) != vblen)
- internal_error ("printf:vbadd: vblen (%d) != strlen (vbuf) (%d)", vblen, (int)strlen (vbuf));
-#endif
-
- return vbuf;
-}
-
-static int
-#if defined (PREFER_STDARG)
-vbprintf (const char *format, ...)
-#else
-vbprintf (format, va_alist)
- const char *format;
- va_dcl
-#endif
-{
- va_list args;
- size_t nlen;
- int blen;
-
- SH_VA_START (args, format);
- blen = vsnprintf (vbuf + vblen, vbsize - vblen, format, args);
- va_end (args);
-
- nlen = vblen + blen + 1;
- if (nlen >= vbsize)
- {
- vbsize = ((nlen + 63) >> 6) << 6;
- vbuf = (char *)xrealloc (vbuf, vbsize);
- SH_VA_START (args, format);
- blen = vsnprintf (vbuf + vblen, vbsize - vblen, format, args);
- va_end (args);
- }
-
- vblen += blen;
- vbuf[vblen] = '\0';
-
-#ifdef DEBUG
- if (strlen (vbuf) != vblen)
- internal_error ("printf:vbadd: vblen (%d) != strlen (vbuf) (%d)", vblen, (int)strlen (vbuf));
-#endif
-
- return (blen);
-}
-
-static char *
-mklong (str, modifiers, mlen)
- char *str;
- char *modifiers;
- size_t mlen;
-{
- size_t len, slen;
-
- slen = strlen (str);
- len = slen + mlen + 1;
-
- if (len > conv_bufsize)
- {
- conv_bufsize = (((len + 1023) >> 10) << 10);
- conv_buf = (char *)xrealloc (conv_buf, conv_bufsize);
- }
-
- FASTCOPY (str, conv_buf, slen - 1);
- FASTCOPY (modifiers, conv_buf + slen - 1, mlen);
-
- conv_buf[len - 2] = str[slen - 1];
- conv_buf[len - 1] = '\0';
- return (conv_buf);
-}
-
-static int
-getchr ()
-{
- int ret;
-
- if (garglist == 0)
- return ('\0');
-
- ret = (int)garglist->word->word[0];
- garglist = garglist->next;
- return ret;
-}
-
-static char *
-getstr ()
-{
- char *ret;
-
- if (garglist == 0)
- return ("");
-
- ret = garglist->word->word;
- garglist = garglist->next;
- return ret;
-}
-
-static int
-getint ()
-{
- intmax_t ret;
-
- ret = getintmax ();
-
- if (ret > INT_MAX)
- {
- printf_erange (garglist->word->word);
- ret = INT_MAX;
- }
- else if (ret < INT_MIN)
- {
- printf_erange (garglist->word->word);
- ret = INT_MIN;
- }
-
- return ((int)ret);
-}
-
-static intmax_t
-getintmax ()
-{
- intmax_t ret;
- char *ep;
-
- if (garglist == 0)
- return (0);
-
- if (garglist->word->word[0] == '\'' || garglist->word->word[0] == '"')
- return asciicode ();
-
- errno = 0;
- ret = strtoimax (garglist->word->word, &ep, 0);
-
- if (*ep)
- {
- sh_invalidnum (garglist->word->word);
- /* POSIX.2 says ``...a diagnostic message shall be written to standard
- error, and the utility shall not exit with a zero exit status, but
- shall continue processing any remaining operands and shall write the
- value accumulated at the time the error was detected to standard
- output.'' Yecch. */
-#if 0
- ret = 0; /* return partially-converted value from strtoimax */
-#endif
- conversion_error = 1;
- }
- else if (errno == ERANGE)
- printf_erange (garglist->word->word);
-
- garglist = garglist->next;
- return (ret);
-}
-
-static uintmax_t
-getuintmax ()
-{
- uintmax_t ret;
- char *ep;
-
- if (garglist == 0)
- return (0);
-
- if (garglist->word->word[0] == '\'' || garglist->word->word[0] == '"')
- return asciicode ();
-
- errno = 0;
- ret = strtoumax (garglist->word->word, &ep, 0);
-
- if (*ep)
- {
- sh_invalidnum (garglist->word->word);
- /* Same POSIX.2 conversion error requirements as getintmax(). */
- ret = 0;
- conversion_error = 1;
- }
- else if (errno == ERANGE)
- printf_erange (garglist->word->word);
-
- garglist = garglist->next;
- return (ret);
-}
-
-static floatmax_t
-getfloatmax ()
-{
- floatmax_t ret;
- char *ep;
-
- if (garglist == 0)
- return (0);
-
- if (garglist->word->word[0] == '\'' || garglist->word->word[0] == '"')
- return asciicode ();
-
- errno = 0;
- ret = strtofltmax (garglist->word->word, &ep);
-
- if (*ep)
- {
- sh_invalidnum (garglist->word->word);
- /* Same thing about POSIX.2 conversion error requirements. */
- ret = 0;
- conversion_error = 1;
- }
- else if (errno == ERANGE)
- printf_erange (garglist->word->word);
-
- garglist = garglist->next;
- return (ret);
-}
-
-/* NO check is needed for garglist here. */
-static intmax_t
-asciicode ()
-{
- register intmax_t ch;
-#if defined (HANDLE_MULTIBYTE)
- wchar_t wc;
- size_t mblength, slen;
-#endif
- DECLARE_MBSTATE;
-
-#if defined (HANDLE_MULTIBYTE)
- slen = strlen (garglist->word->word+1);
- mblength = MBLEN (garglist->word->word+1, slen);
- if (mblength > 1)
- {
- mblength = mbtowc (&wc, garglist->word->word+1, slen);
- ch = wc; /* XXX */
- }
- else
-#endif
- ch = (unsigned char)garglist->word->word[1];
-
- garglist = garglist->next;
- return (ch);
-}
-
-static SHELL_VAR *
-bind_printf_variable (name, value, flags)
- char *name;
- char *value;
- int flags;
-{
-#if defined (ARRAY_VARS)
- if (valid_array_reference (name) == 0)
- return (bind_variable (name, value, flags));
- else
- return (assign_array_element (name, value, flags));
-#else /* !ARRAY_VARS */
- return bind_variable (name, value, flags);
-#endif /* !ARRAY_VARS */
-}
+++ /dev/null
-/* config-top.h - various user-settable options not under the control of autoconf. */
-
-/* Copyright (C) 2002-2009 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/* Define CONTINUE_AFTER_KILL_ERROR if you want the kill command to
- continue processing arguments after one of them fails. This is
- what POSIX.2 specifies. */
-#define CONTINUE_AFTER_KILL_ERROR
-
-/* Define BREAK_COMPLAINS if you want the non-standard, but useful
- error messages about `break' and `continue' out of context. */
-#define BREAK_COMPLAINS
-
-/* Define BUFFERED_INPUT if you want the shell to do its own input
- buffering, rather than using stdio. Do not undefine this; it's
- required to preserve semantics required by POSIX. */
-#define BUFFERED_INPUT
-
-/* Define ONESHOT if you want sh -c 'command' to avoid forking to execute
- `command' whenever possible. This is a big efficiency improvement. */
-#define ONESHOT
-
-/* Define V9_ECHO if you want to give the echo builtin backslash-escape
- interpretation using the -e option, in the style of the Bell Labs 9th
- Edition version of echo. You cannot emulate the System V echo behavior
- without this option. */
-#define V9_ECHO
-
-/* Define DONT_REPORT_SIGPIPE if you don't want to see `Broken pipe' messages
- when a job like `cat jobs.c | exit 1' terminates due to a SIGPIPE. */
-#define DONT_REPORT_SIGPIPE
-
-/* Define DONT_REPORT_SIGTERM if you don't want to see `Terminates' message
- when a job exits due to SIGTERM, since that's the default signal sent
- by the kill builtin. */
-#define DONT_REPORT_SIGTERM
-
-/* Define DONT_REPORT_BROKEN_PIPE_WRITE_ERRORS if you don't want builtins
- like `echo' and `printf' to report errors when output does not succeed
- due to EPIPE. */
-/* #define DONT_REPORT_BROKEN_PIPE_WRITE_ERRORS */
-
-/* The default value of the PATH variable. */
-#ifndef DEFAULT_PATH_VALUE
-#define DEFAULT_PATH_VALUE \
- "/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:."
-#endif
-
-/* The value for PATH when invoking `command -p'. This is only used when
- the Posix.2 confstr () function, or CS_PATH define are not present. */
-#ifndef STANDARD_UTILS_PATH
-#define STANDARD_UTILS_PATH \
- "/bin:/usr/bin:/sbin:/usr/sbin:/etc:/usr/etc"
-#endif
-
-/* Default primary and secondary prompt strings. */
-#define PPROMPT "\\s-\\v\\$ "
-#define SPROMPT "> "
-
-/* Undefine this if you don't want the ksh-compatible behavior of reprinting
- the select menu after a valid choice is made only if REPLY is set to NULL
- in the body of the select command. The menu is always reprinted if the
- reply to the select query is an empty line. */
-#define KSH_COMPATIBLE_SELECT
-
-/* System-wide .bashrc file for interactive shells. */
-/* #define SYS_BASHRC "/etc/bash.bashrc" */
-
-/* System-wide .bash_logout for login shells. */
-/* #define SYS_BASH_LOGOUT "/etc/bash.bash_logout" */
-
-/* Define this to make non-interactive shells begun with argv[0][0] == '-'
- run the startup files when not in posix mode. */
-/* #define NON_INTERACTIVE_LOGIN_SHELLS */
-
-/* Define this if you want bash to try to check whether it's being run by
- sshd and source the .bashrc if so (like the rshd behavior). This checks
- for the presence of SSH_CLIENT or SSH2_CLIENT in the initial environment,
- which can be fooled under certain not-uncommon circumstances. */
-/* #define SSH_SOURCE_BASHRC */
-
-/* Define if you want the case-capitalizing operators (~[~]) and the
- `capcase' variable attribute (declare -c). */
-#define CASEMOD_CAPCASE
-
-/* This is used as the name of a shell function to call when a command
- name is not found. If you want to name it something other than the
- default ("command_not_found_handle"), change it here. */
-/* #define NOTFOUND_HOOK "command_not_found_handle" */
-
-/* Define if you want each line saved to the history list in bashhist.c:
- bash_add_history() to be sent to syslog(). */
-/* #define SYSLOG_HISTORY */
-#if defined (SYSLOG_HISTORY)
-# define SYSLOG_FACILITY LOG_USER
-# define SYSLOG_LEVEL LOG_INFO
-#endif
-
-/* Define if you want to include code in shell.c to support wordexp(3) */
-/* #define WORDEXP_OPTION */
-
-/* Define as 1 if you want to enable code that implements multiple coprocs */
-#ifndef MULTIPLE_COPROCS
-# define MULTIPLE_COPROCS 0
-#endif
+++ /dev/null
-dnl
-dnl Configure script for bash-4.2
-dnl
-dnl report bugs to chet@po.cwru.edu
-dnl
-dnl Process this file with autoconf to produce a configure script.
-
-# Copyright (C) 1987-2011 Free Software Foundation, Inc.
-
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-AC_REVISION([for Bash 4.2, version 4.037])dnl
-
-define(bashvers, 4.2)
-define(relstatus, release)
-
-AC_INIT([bash], bashvers-relstatus, [bug-bash@gnu.org])
-
-dnl make sure we are using a recent autoconf version
-AC_PREREQ(2.50)
-
-AC_CONFIG_SRCDIR(shell.h)
-dnl where to find install.sh, config.sub, and config.guess
-AC_CONFIG_AUX_DIR(./support)
-AC_CONFIG_HEADERS(config.h)
-
-dnl checks for version info
-BASHVERS=bashvers
-RELSTATUS=relstatus
-
-dnl defaults for debug settings
-case "$RELSTATUS" in
-alp*|bet*|dev*|rc*|maint*) DEBUG='-DDEBUG' MALLOC_DEBUG='-DMALLOC_DEBUG' ;;
-*) DEBUG= MALLOC_DEBUG= ;;
-esac
-
-dnl canonicalize the host and os so we can do some tricky things before
-dnl parsing options
-AC_CANONICAL_HOST
-
-dnl configure defaults
-opt_bash_malloc=yes
-opt_purify=no
-opt_purecov=no
-opt_afs=no
-opt_curses=no
-opt_with_installed_readline=no
-
-#htmldir=
-
-dnl some systems should be configured without the bash malloc by default
-dnl and some need a special compiler or loader
-dnl look in the NOTES file for more
-case "${host_cpu}-${host_os}" in
-alpha*-*) opt_bash_malloc=no ;; # alpha running osf/1 or linux
-*[[Cc]]ray*-*) opt_bash_malloc=no ;; # Crays
-*-osf1*) opt_bash_malloc=no ;; # other osf/1 machines
-sparc-svr4*) opt_bash_malloc=no ;; # sparc SVR4, SVR4.2
-sparc-netbsd*) opt_bash_malloc=no ;; # needs 8-byte alignment
-mips-irix6*) opt_bash_malloc=no ;; # needs 8-byte alignment
-m68k-sysv) opt_bash_malloc=no ;; # fixes file descriptor leak in closedir
-sparc-linux*) opt_bash_malloc=no ;; # sparc running linux; requires ELF
-#*-freebsd*-gnu) opt_bash_malloc=no ;; # there's some undetermined problem here
-#*-freebsd*) opt_bash_malloc=no ;; # they claim it's better; I disagree
-*-openbsd*) opt_bash_malloc=no ;; # they claim it needs eight-bit alignment
-*-aix*) opt_bash_malloc=no ;; # AIX machines
-*-nextstep*) opt_bash_malloc=no ;; # NeXT machines running NeXTstep
-*-macos*) opt_bash_malloc=no ;; # Apple MacOS X
-*-rhapsody*) opt_bash_malloc=no ;; # Apple Rhapsody (MacOS X)
-*-darwin*) opt_bash_malloc=no ;; # Apple Darwin (MacOS X)
-*-dgux*) opt_bash_malloc=no ;; # DG/UX machines
-*-qnx*) opt_bash_malloc=no ;; # QNX 4.2, QNX 6.x
-*-machten4) opt_bash_malloc=no ;; # MachTen 4.x
-*-bsdi2.1|*-bsdi3.?) opt_bash_malloc=no ; : ${CC:=shlicc2} ;; # for loadable builtins
-*-beos*) opt_bash_malloc=no ;; # they say it's suitable
-*-cygwin*) opt_bash_malloc=no ;; # Cygnus's CYGWIN environment
-*-opennt*|*-interix*) opt_bash_malloc=no ;; # Interix, now owned by Microsoft
-esac
-
-# memory scrambling on free()
-case "${host_os}" in
-sco3.2v5*|sco3.2v4*) opt_memscramble=no ;;
-*) opt_memscramble=yes ;;
-esac
-
-dnl
-dnl macros for the bash debugger
-dnl
-dnl AM_PATH_LISPDIR
-AC_ARG_VAR(DEBUGGER_START_FILE, [location of bash debugger initialization file])
-
-dnl arguments to configure
-dnl packages
-AC_ARG_WITH(afs, AC_HELP_STRING([--with-afs], [if you are running AFS]), opt_afs=$withval)
-AC_ARG_WITH(bash-malloc, AC_HELP_STRING([--with-bash-malloc], [use the Bash version of malloc]), opt_bash_malloc=$withval)
-AC_ARG_WITH(curses, AC_HELP_STRING([--with-curses], [use the curses library instead of the termcap library]), opt_curses=$withval)
-AC_ARG_WITH(gnu-malloc, AC_HELP_STRING([--with-gnu-malloc], [synonym for --with-bash-malloc]), opt_bash_malloc=$withval)
-AC_ARG_WITH(installed-readline, AC_HELP_STRING([--with-installed-readline], [use a version of the readline library that is already installed]), opt_with_installed_readline=$withval)
-AC_ARG_WITH(purecov, AC_HELP_STRING([--with-purecov], [configure to postprocess with pure coverage]), opt_purecov=$withval)
-AC_ARG_WITH(purify, AC_HELP_STRING([--with-purify], [configure to postprocess with purify]), opt_purify=$withval)
-
-if test "$opt_bash_malloc" = yes; then
- MALLOC_TARGET=malloc
- MALLOC_SRC=malloc.c
-
- MALLOC_LIB='-lmalloc'
- MALLOC_LIBRARY='$(ALLOC_LIBDIR)/libmalloc.a'
- MALLOC_LDFLAGS='-L$(ALLOC_LIBDIR)'
- MALLOC_DEP='$(MALLOC_LIBRARY)'
-
- AC_DEFINE(USING_BASH_MALLOC)
-else
- MALLOC_LIB=
- MALLOC_LIBRARY=
- MALLOC_LDFLAGS=
- MALLOC_DEP=
-fi
-
-if test "$opt_purify" = yes; then
- PURIFY="purify "
- AC_DEFINE(DISABLE_MALLOC_WRAPPERS)
-else
- PURIFY=
-fi
-
-if test "$opt_purecov" = yes; then
- PURIFY="${PURIFY}purecov"
-fi
-
-if test "$opt_afs" = yes; then
- AC_DEFINE(AFS)
-fi
-
-if test "$opt_curses" = yes; then
- prefer_curses=yes
-fi
-
-if test -z "${DEBUGGER_START_FILE}"; then
- DEBUGGER_START_FILE='${datadir}/bashdb/bashdb-main.inc'
-fi
-
-dnl optional shell features in config.h.in
-opt_minimal_config=no
-
-opt_job_control=yes
-opt_alias=yes
-opt_readline=yes
-opt_history=yes
-opt_bang_history=yes
-opt_dirstack=yes
-opt_restricted=yes
-opt_process_subst=yes
-opt_prompt_decoding=yes
-opt_select=yes
-opt_help=yes
-opt_array_variables=yes
-opt_dparen_arith=yes
-opt_extended_glob=yes
-opt_brace_expansion=yes
-opt_disabled_builtins=no
-opt_command_timing=yes
-opt_xpg_echo=no
-opt_strict_posix=no
-opt_cond_command=yes
-opt_cond_regexp=yes
-opt_coproc=yes
-opt_arith_for_command=yes
-opt_net_redirs=yes
-opt_progcomp=yes
-opt_separate_help=no
-opt_multibyte=yes
-opt_debugger=yes
-opt_single_longdoc_strings=yes
-opt_casemod_attrs=yes
-opt_casemod_expansions=yes
-opt_extglob_default=no
-
-dnl options that affect how bash is compiled and linked
-opt_static_link=no
-opt_profiling=no
-
-dnl argument parsing for optional features
-AC_ARG_ENABLE(minimal-config, AC_HELP_STRING([--enable-minimal-config], [a minimal sh-like configuration]), opt_minimal_config=$enableval)
-
-dnl a minimal configuration turns everything off, but features can be
-dnl added individually
-if test $opt_minimal_config = yes; then
- opt_job_control=no opt_alias=no opt_readline=no
- opt_history=no opt_bang_history=no opt_dirstack=no
- opt_restricted=no opt_process_subst=no opt_prompt_decoding=no
- opt_select=no opt_help=no opt_array_variables=no opt_dparen_arith=no
- opt_brace_expansion=no opt_disabled_builtins=no opt_command_timing=no
- opt_extended_glob=no opt_cond_command=no opt_arith_for_command=no
- opt_net_redirs=no opt_progcomp=no opt_separate_help=no
- opt_multibyte=yes opt_cond_regexp=no opt_coproc=no
- opt_casemod_attrs=no opt_casemod_expansions=no opt_extglob_default=no
-fi
-
-AC_ARG_ENABLE(alias, AC_HELP_STRING([--enable-alias], [enable shell aliases]), opt_alias=$enableval)
-AC_ARG_ENABLE(arith-for-command, AC_HELP_STRING([--enable-arith-for-command], [enable arithmetic for command]), opt_arith_for_command=$enableval)
-AC_ARG_ENABLE(array-variables, AC_HELP_STRING([--enable-array-variables], [include shell array variables]), opt_array_variables=$enableval)
-AC_ARG_ENABLE(bang-history, AC_HELP_STRING([--enable-bang-history], [turn on csh-style history substitution]), opt_bang_history=$enableval)
-AC_ARG_ENABLE(brace-expansion, AC_HELP_STRING([--enable-brace-expansion], [include brace expansion]), opt_brace_expansion=$enableval)
-AC_ARG_ENABLE(casemod-attributes, AC_HELP_STRING([--enable-casemod-attributes], [include case-modifying variable attributes]), opt_casemod_attrs=$enableval)
-AC_ARG_ENABLE(casemod-expansions, AC_HELP_STRING([--enable-casemod-expansions], [include case-modifying word expansions]), opt_casemod_expansions=$enableval)
-AC_ARG_ENABLE(command-timing, AC_HELP_STRING([--enable-command-timing], [enable the time reserved word and command timing]), opt_command_timing=$enableval)
-AC_ARG_ENABLE(cond-command, AC_HELP_STRING([--enable-cond-command], [enable the conditional command]), opt_cond_command=$enableval)
-AC_ARG_ENABLE(cond-regexp, AC_HELP_STRING([--enable-cond-regexp], [enable extended regular expression matching in conditional commands]), opt_cond_regexp=$enableval)
-AC_ARG_ENABLE(coprocesses, AC_HELP_STRING([--enable-coprocesses], [enable coprocess support and the coproc reserved word]), opt_coproc=$enableval)
-AC_ARG_ENABLE(debugger, AC_HELP_STRING([--enable-debugger], [enable support for bash debugger]), opt_debugger=$enableval)
-AC_ARG_ENABLE(directory-stack, AC_HELP_STRING([--enable-directory-stack], [enable builtins pushd/popd/dirs]), opt_dirstack=$enableval)
-AC_ARG_ENABLE(disabled-builtins, AC_HELP_STRING([--enable-disabled-builtins], [allow disabled builtins to still be invoked]), opt_disabled_builtins=$enableval)
-AC_ARG_ENABLE(dparen-arithmetic, AC_HELP_STRING([--enable-dparen-arithmetic], [include ((...)) command]), opt_dparen_arith=$enableval)
-AC_ARG_ENABLE(extended-glob, AC_HELP_STRING([--enable-extended-glob], [include ksh-style extended pattern matching]), opt_extended_glob=$enableval)
-AC_ARG_ENABLE(extended-glob-default, AC_HELP_STRING([--enable-extended-glob-default], [force extended pattern matching to be enabled by default]), opt_extglob_default=$enableval)
-AC_ARG_ENABLE(help-builtin, AC_HELP_STRING([--enable-help-builtin], [include the help builtin]), opt_help=$enableval)
-AC_ARG_ENABLE(history, AC_HELP_STRING([--enable-history], [turn on command history]), opt_history=$enableval)
-AC_ARG_ENABLE(job-control, AC_HELP_STRING([--enable-job-control], [enable job control features]), opt_job_control=$enableval)
-AC_ARG_ENABLE(multibyte, AC_HELP_STRING([--enable-multibyte], [enable multibyte characters if OS supports them]), opt_multibyte=$enableval)
-AC_ARG_ENABLE(net-redirections, AC_HELP_STRING([--enable-net-redirections], [enable /dev/tcp/host/port redirection]), opt_net_redirs=$enableval)
-AC_ARG_ENABLE(process-substitution, AC_HELP_STRING([--enable-process-substitution], [enable process substitution]), opt_process_subst=$enableval)
-AC_ARG_ENABLE(progcomp, AC_HELP_STRING([--enable-progcomp], [enable programmable completion and the complete builtin]), opt_progcomp=$enableval)
-AC_ARG_ENABLE(prompt-string-decoding, AC_HELP_STRING([--enable-prompt-string-decoding], [turn on escape character decoding in prompts]), opt_prompt_decoding=$enableval)
-AC_ARG_ENABLE(readline, AC_HELP_STRING([--enable-readline], [turn on command line editing]), opt_readline=$enableval)
-AC_ARG_ENABLE(restricted, AC_HELP_STRING([--enable-restricted], [enable a restricted shell]), opt_restricted=$enableval)
-AC_ARG_ENABLE(select, AC_HELP_STRING([--enable-select], [include select command]), opt_select=$enableval)
-AC_ARG_ENABLE(separate-helpfiles, AC_HELP_STRING([--enable-separate-helpfiles], [use external files for help builtin documentation]), opt_separate_help=$enableval)
-AC_ARG_ENABLE(single-help-strings, AC_HELP_STRING([--enable-single-help-strings], [store help documentation as a single string to ease translation]), opt_single_longdoc_strings=$enableval)
-AC_ARG_ENABLE(strict-posix-default, AC_HELP_STRING([--enable-strict-posix-default], [configure bash to be posix-conformant by default]), opt_strict_posix=$enableval)
-AC_ARG_ENABLE(usg-echo-default, AC_HELP_STRING([--enable-usg-echo-default], [a synonym for --enable-xpg-echo-default]), opt_xpg_echo=$enableval)
-AC_ARG_ENABLE(xpg-echo-default, AC_HELP_STRING([--enable-xpg-echo-default], [make the echo builtin expand escape sequences by default]), opt_xpg_echo=$enableval)
-
-dnl options that alter how bash is compiled and linked
-AC_ARG_ENABLE(mem-scramble, AC_HELP_STRING([--enable-mem-scramble], [scramble memory on calls to malloc and free]), opt_memscramble=$enableval)
-AC_ARG_ENABLE(profiling, AC_HELP_STRING([--enable-profiling], [allow profiling with gprof]), opt_profiling=$enableval)
-AC_ARG_ENABLE(static-link, AC_HELP_STRING([--enable-static-link], [link bash statically, for use as a root shell]), opt_static_link=$enableval)
-
-dnl opt_job_control is handled later, after BASH_JOB_CONTROL_MISSING runs
-
-dnl opt_readline and opt_history are handled later, because AC_PROG_CC needs
-dnl to be run before we can check the version of an already-installed readline
-dnl library
-
-if test $opt_alias = yes; then
-AC_DEFINE(ALIAS)
-fi
-if test $opt_dirstack = yes; then
-AC_DEFINE(PUSHD_AND_POPD)
-fi
-if test $opt_restricted = yes; then
-AC_DEFINE(RESTRICTED_SHELL)
-fi
-if test $opt_process_subst = yes; then
-AC_DEFINE(PROCESS_SUBSTITUTION)
-fi
-if test $opt_prompt_decoding = yes; then
-AC_DEFINE(PROMPT_STRING_DECODE)
-fi
-if test $opt_select = yes; then
-AC_DEFINE(SELECT_COMMAND)
-fi
-if test $opt_help = yes; then
-AC_DEFINE(HELP_BUILTIN)
-fi
-if test $opt_array_variables = yes; then
-AC_DEFINE(ARRAY_VARS)
-fi
-if test $opt_dparen_arith = yes; then
-AC_DEFINE(DPAREN_ARITHMETIC)
-fi
-if test $opt_brace_expansion = yes; then
-AC_DEFINE(BRACE_EXPANSION)
-fi
-if test $opt_disabled_builtins = yes; then
-AC_DEFINE(DISABLED_BUILTINS)
-fi
-if test $opt_command_timing = yes; then
-AC_DEFINE(COMMAND_TIMING)
-fi
-if test $opt_xpg_echo = yes ; then
-AC_DEFINE(DEFAULT_ECHO_TO_XPG)
-fi
-if test $opt_strict_posix = yes; then
-AC_DEFINE(STRICT_POSIX)
-fi
-if test $opt_extended_glob = yes ; then
-AC_DEFINE(EXTENDED_GLOB)
-fi
-if test $opt_extglob_default = yes; then
-AC_DEFINE(EXTGLOB_DEFAULT, 1)
-else
-AC_DEFINE(EXTGLOB_DEFAULT, 0)
-fi
-if test $opt_cond_command = yes ; then
-AC_DEFINE(COND_COMMAND)
-fi
-if test $opt_cond_regexp = yes ; then
-AC_DEFINE(COND_REGEXP)
-fi
-if test $opt_coproc = yes; then
-AC_DEFINE(COPROCESS_SUPPORT)
-fi
-if test $opt_arith_for_command = yes; then
-AC_DEFINE(ARITH_FOR_COMMAND)
-fi
-if test $opt_net_redirs = yes; then
-AC_DEFINE(NETWORK_REDIRECTIONS)
-fi
-if test $opt_progcomp = yes; then
-AC_DEFINE(PROGRAMMABLE_COMPLETION)
-fi
-if test $opt_multibyte = no; then
-AC_DEFINE(NO_MULTIBYTE_SUPPORT)
-fi
-if test $opt_debugger = yes; then
-AC_DEFINE(DEBUGGER)
-fi
-if test $opt_casemod_attrs = yes; then
-AC_DEFINE(CASEMOD_ATTRS)
-fi
-if test $opt_casemod_expansions = yes; then
-AC_DEFINE(CASEMOD_EXPANSIONS)
-fi
-
-if test $opt_memscramble = yes; then
-AC_DEFINE(MEMSCRAMBLE)
-fi
-
-if test "$opt_minimal_config" = yes; then
- TESTSCRIPT=run-minimal
-else
- TESTSCRIPT=run-all
-fi
-
-HELPDIR= HELPDIRDEFINE= HELPINSTALL=
-if test "$opt_separate_help" != no; then
- if test "$opt_separate_help" = "yes" ; then
- HELPDIR='${datadir}/bash'
- else
- HELPDIR=$opt_separate_help
- fi
- HELPDIRDEFINE='-H ${HELPDIR}'
- HELPINSTALL='install-help'
-fi
-HELPSTRINGS=
-if test "$opt_single_longdoc_strings" != "yes"; then
- HELPSTRINGS='-S'
-fi
-
-dnl now substitute in the values generated by arguments
-AC_SUBST(TESTSCRIPT)
-AC_SUBST(PURIFY)
-AC_SUBST(MALLOC_TARGET)
-AC_SUBST(MALLOC_SRC)
-
-AC_SUBST(MALLOC_LIB)
-AC_SUBST(MALLOC_LIBRARY)
-AC_SUBST(MALLOC_LDFLAGS)
-AC_SUBST(MALLOC_DEP)
-
-AC_SUBST(htmldir)
-
-AC_SUBST(HELPDIR)
-AC_SUBST(HELPDIRDEFINE)
-AC_SUBST(HELPINSTALL)
-AC_SUBST(HELPSTRINGS)
-
-echo ""
-echo "Beginning configuration for bash-$BASHVERS-$RELSTATUS for ${host_cpu}-${host_vendor}-${host_os}"
-echo ""
-
-dnl compilation checks
-dnl AC_PROG_CC sets $cross_compiling to `yes' if cross-compiling for a
-dnl different environment
-AC_PROG_CC
-
-dnl test for Unix variants
-AC_ISC_POSIX
-AC_MINIX
-
-AC_SYS_LARGEFILE
-
-dnl BEGIN changes for cross-building (currently cygwin, minGW, and
-dnl (obsolete) BeOS)
-
-SIGNAMES_O=
-SIGNAMES_H=lsignames.h
-
-dnl load up the cross-building cache file -- add more cases and cache
-dnl files as necessary
-
-dnl Note that host and target machine are the same, and different than the
-dnl build machine.
-dnl Set SIGNAMES_H based on whether or not we're cross-compiling.
-
-CROSS_COMPILE=
-if test "x$cross_compiling" = "xyes"; then
- case "${host}" in
- *-cygwin*)
- cross_cache=${srcdir}/cross-build/cygwin32.cache
- ;;
- *-mingw*)
- cross_cache=${srcdir}/cross-build/cygwin32.cache
- ;;
- i[[3456]]86-*-beos*)
- cross_cache=${srcdir}/cross-build/x86-beos.cache
- ;;
- *) echo "configure: cross-compiling for $host is not supported" >&2
- ;;
- esac
- if test -n "${cross_cache}" && test -r "${cross_cache}"; then
- echo "loading cross-build cache file ${cross_cache}"
- . ${cross_cache}
- fi
- unset cross_cache
- SIGNAMES_O='signames.o'
- CROSS_COMPILE='-DCROSS_COMPILING'
- AC_SUBST(CROSS_COMPILE)
-fi
-AC_SUBST(SIGNAMES_H)
-AC_SUBST(SIGNAMES_O)
-
-if test -z "$CC_FOR_BUILD"; then
- if test "x$cross_compiling" = "xno"; then
- CC_FOR_BUILD='$(CC)'
- else
- CC_FOR_BUILD=gcc
- fi
-fi
-AC_SUBST(CC_FOR_BUILD)
-
-dnl END changes for cross-building
-
-dnl We want these before the checks, so the checks can modify their values.
-test -z "$CFLAGS" && CFLAGS=-g auto_cflags=1
-
-dnl If we're using gcc and the user hasn't specified CFLAGS, add -O2 to CFLAGS.
-test -n "$GCC" && test -n "$auto_cflags" && CFLAGS="$CFLAGS -O2"
-
-dnl handle options that alter how bash is compiled and linked
-dnl these must come after the test for cc/gcc
-if test "$opt_profiling" = "yes"; then
- PROFILE_FLAGS=-pg
- case "$host_os" in
- solaris2*) ;;
- *) opt_static_link=yes ;;
- esac
- DEBUG= MALLOC_DEBUG=
-fi
-
-if test "$opt_static_link" = yes; then
- # if we're using gcc, add `-static' to LDFLAGS, except on Solaris >= 2
- if test -n "$GCC" || test "$ac_cv_prog_gcc" = "yes"; then
- STATIC_LD="-static"
- case "$host_os" in
- solaris2*) ;;
- *) LDFLAGS="$LDFLAGS -static" ;; # XXX experimental
- esac
- fi
-fi
-
-if test "X$cross_compiling" = "Xno"; then
- CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-"$CPPFLAGS"}
- LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-'$(LDFLAGS)'}
-else
- CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-""}
- LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-""}
-fi
-
-test -z "$CFLAGS_FOR_BUILD" && CFLAGS_FOR_BUILD="-g"
-
-AC_SUBST(CFLAGS)
-AC_SUBST(CPPFLAGS)
-AC_SUBST(LDFLAGS)
-AC_SUBST(STATIC_LD)
-
-AC_SUBST(CFLAGS_FOR_BUILD)
-AC_SUBST(CPPFLAGS_FOR_BUILD)
-AC_SUBST(LDFLAGS_FOR_BUILD)
-
-AC_PROG_GCC_TRADITIONAL
-
-dnl BEGIN READLINE and HISTORY LIBRARY SECTION
-dnl prepare to allow bash to be linked against an already-installed readline
-
-dnl first test that the readline version is new enough to link bash against
-if test "$opt_readline" = yes && test "$opt_with_installed_readline" != "no"
-then
- # If the user specified --with-installed-readline=PREFIX and PREFIX
- # is not `yes', set ac_cv_rl_prefix to PREFIX
- test $opt_with_installed_readline != "yes" && ac_cv_rl_prefix=$opt_with_installed_readline
-
- RL_LIB_READLINE_VERSION
-
- case "$ac_cv_rl_version" in
- 5*|6*|7*|8*|9*) ;;
- *) opt_with_installed_readline=no
- AC_MSG_WARN([installed readline library is too old to be linked with bash])
- AC_MSG_WARN([using private bash version])
- ;;
- esac
-fi
-
-TILDE_LIB=-ltilde
-if test $opt_readline = yes; then
- AC_DEFINE(READLINE)
- if test "$opt_with_installed_readline" != "no" ; then
- case "$opt_with_installed_readline" in
- yes) RL_INCLUDE= ;;
- *) case "$RL_INCLUDEDIR" in
- /usr/include) ;;
- *) RL_INCLUDE='-I${RL_INCLUDEDIR}' ;;
- esac
- ;;
- esac
- READLINE_DEP=
- READLINE_LIB=-lreadline
- # section for OS versions that don't allow unresolved symbols
- # to be compiled into dynamic libraries.
- case "$host_os" in
- cygwin*) TILDE_LIB= ;;
- esac
- else
- RL_LIBDIR='$(dot)/$(LIBSUBDIR)/readline'
- READLINE_DEP='$(READLINE_LIBRARY)'
- # section for OS versions that ship an older/broken version of
- # readline as a standard dynamic library and don't allow a
- # static version specified as -llibname to override the
- # dynamic version
- case "${host_os}" in
- darwin[[89]]*|darwin10*) READLINE_LIB='${READLINE_LIBRARY}' ;;
- *) READLINE_LIB=-lreadline ;;
- esac
- fi
-else
- RL_LIBDIR='$(dot)/$(LIBSUBDIR)/readline'
- READLINE_LIB= READLINE_DEP=
-fi
-if test $opt_history = yes || test $opt_bang_history = yes; then
- if test $opt_history = yes; then
- AC_DEFINE(HISTORY)
- fi
- if test $opt_bang_history = yes; then
- AC_DEFINE(BANG_HISTORY)
- fi
- if test "$opt_with_installed_readline" != "no"; then
- HIST_LIBDIR=$RL_LIBDIR
- HISTORY_DEP=
- HISTORY_LIB=-lhistory
- case "$opt_with_installed_readline" in
- yes) RL_INCLUDE= ;;
- *) case "$RL_INCLUDEDIR" in
- /usr/include) ;;
- *) RL_INCLUDE='-I${RL_INCLUDEDIR}' ;;
- esac
- ;;
- esac
- else
- HIST_LIBDIR='$(dot)/$(LIBSUBDIR)/readline'
- HISTORY_DEP='$(HISTORY_LIBRARY)'
- # section for OS versions that ship an older version of
- # readline as a standard dynamic library and don't allow a
- # static version specified as -llibname to override the
- # dynamic version
- case "${host_os}" in
- darwin[[89]]*|darwin10*) HISTORY_LIB='${HISTORY_LIBRARY}' ;;
- *) HISTORY_LIB=-lhistory ;;
- esac
- fi
-else
- HIST_LIBDIR='$(dot)/$(LIBSUBDIR)/readline'
- HISTORY_LIB= HISTORY_DEP=
-fi
-AC_SUBST(READLINE_LIB)
-AC_SUBST(READLINE_DEP)
-AC_SUBST(RL_LIBDIR)
-AC_SUBST(RL_INCLUDEDIR)
-AC_SUBST(RL_INCLUDE)
-AC_SUBST(HISTORY_LIB)
-AC_SUBST(HISTORY_DEP)
-AC_SUBST(HIST_LIBDIR)
-AC_SUBST(TILDE_LIB)
-
-dnl END READLINE and HISTORY LIBRARY SECTION
-
-dnl programs needed by the build and install process
-AC_PROG_INSTALL
-AC_CHECK_PROG(AR, ar, , ar)
-dnl Set default for ARFLAGS, since autoconf does not have a macro for it.
-dnl This allows people to set it when running configure or make
-test -n "$ARFLAGS" || ARFLAGS="cr"
-AC_PROG_RANLIB
-AC_PROG_YACC
-AC_PROG_MAKE_SET
-
-case "$host_os" in
-opennt*|interix*) MAKE_SHELL="$INTERIX_ROOT/bin/sh" ;;
-*) MAKE_SHELL=/bin/sh ;;
-esac
-AC_SUBST(MAKE_SHELL)
-
-dnl this is similar to the expanded AC_PROG_RANLIB
-if test x$SIZE = x; then
- if test x$ac_tool_prefix = x; then
- SIZE=size
- else
- SIZE=${ac_tool_prefix}size
- save_IFS=$IFS ; IFS=:
- size_found=0
- for dir in $PATH; do
- if test -x $dir/$SIZE ; then
- size_found=1
- break
- fi
- done
- if test $size_found -eq 0; then
- SIZE=:
- fi
- IFS=$save_IFS
- fi
-fi
-AC_SUBST(SIZE)
-
-dnl Turn on any extensions available in the GNU C library.
-AC_DEFINE(_GNU_SOURCE, 1)
-
-dnl C compiler characteristics
-AC_C_CONST
-AC_C_INLINE
-AC_C_BIGENDIAN
-AC_C_STRINGIZE
-AC_C_LONG_DOUBLE
-AC_C_PROTOTYPES
-AC_C_CHAR_UNSIGNED
-AC_C_VOLATILE
-AC_C_RESTRICT
-
-dnl initialize GNU gettext
-AM_GNU_GETTEXT([no-libtool], [need-ngettext], [lib/intl])
-
-dnl header files
-AC_HEADER_DIRENT
-AC_HEADER_TIME
-
-BASH_HEADER_INTTYPES
-
-AC_CHECK_HEADERS(unistd.h stdlib.h stdarg.h varargs.h limits.h string.h \
- memory.h locale.h termcap.h termio.h termios.h dlfcn.h \
- stddef.h stdint.h netdb.h pwd.h grp.h strings.h regex.h \
- syslog.h ulimit.h)
-AC_CHECK_HEADERS(sys/pte.h sys/stream.h sys/select.h sys/file.h \
- sys/resource.h sys/param.h sys/socket.h sys/stat.h \
- sys/time.h sys/times.h sys/types.h sys/wait.h)
-AC_CHECK_HEADERS(netinet/in.h arpa/inet.h)
-
-dnl sys/ptem.h requires definitions from sys/stream.h on systems where it
-dnl exists
-AC_CHECK_HEADER(sys/ptem.h, , ,[[
-#if HAVE_SYS_STREAM_H
-# include <sys/stream.h>
-#endif
-]])
-
-dnl special checks for libc functions
-AC_FUNC_ALLOCA
-AC_FUNC_GETPGRP
-AC_FUNC_SETVBUF_REVERSED
-AC_FUNC_VPRINTF
-AC_FUNC_STRCOLL
-
-dnl if we're not using the bash malloc but require the C alloca, set things
-dnl up to build a libmalloc.a containing only alloca.o
-
-if test "$ac_cv_func_alloca_works" = "no" && test "$opt_bash_malloc" = "no"; then
- MALLOC_TARGET=alloca
- MALLOC_SRC=alloca.c
-
- MALLOC_LIB='-lmalloc'
- MALLOC_LIBRARY='$(ALLOC_LIBDIR)/libmalloc.a'
- MALLOC_LDFLAGS='-L$(ALLOC_LIBDIR)'
- MALLOC_DEP='$(MALLOC_LIBRARY)'
-fi
-
-dnl if vprintf is not in libc, see if it's defined in stdio.h
-if test "$ac_cv_func_vprintf" = no; then
- AC_MSG_CHECKING(for declaration of vprintf in stdio.h)
- AC_EGREP_HEADER([[int[ ]*vprintf[^a-zA-Z0-9]]],stdio.h,ac_cv_func_vprintf=yes)
- AC_MSG_RESULT($ac_cv_func_vprintf)
- if test $ac_cv_func_vprintf = yes; then
- AC_DEFINE(HAVE_VPRINTF)
- fi
-fi
-
-if test "$ac_cv_func_vprintf" = no && test "$ac_cv_func__doprnt" = "yes"; then
- AC_LIBOBJ(vprint)
-fi
-
-dnl signal stuff
-AC_TYPE_SIGNAL
-
-dnl checks for certain version-specific system calls and libc functions
-AC_CHECK_FUNC(__setostype, AC_DEFINE(HAVE_SETOSTYPE))
-AC_CHECK_FUNC(wait3, AC_DEFINE(HAVE_WAIT3))
-AC_CHECK_FUNC(isinf, AC_DEFINE(HAVE_ISINF_IN_LIBC))
-AC_CHECK_FUNC(isnan, AC_DEFINE(HAVE_ISNAN_IN_LIBC))
-
-dnl checks for missing libc functions
-AC_CHECK_FUNC(mkfifo,AC_DEFINE(HAVE_MKFIFO),AC_DEFINE(MKFIFO_MISSING))
-
-dnl checks for system calls
-AC_CHECK_FUNCS(dup2 eaccess fcntl getdtablesize getgroups gethostname \
- getpagesize getpeername getrlimit getrusage gettimeofday \
- kill killpg lstat readlink sbrk select setdtablesize \
- setitimer tcgetpgrp uname ulimit waitpid)
-AC_REPLACE_FUNCS(rename)
-
-dnl checks for c library functions
-AC_CHECK_FUNCS(bcopy bzero confstr faccessat fnmatch \
- getaddrinfo gethostbyname getservbyname getservent inet_aton \
- memmove pathconf putenv raise regcomp regexec \
- setenv setlinebuf setlocale setvbuf siginterrupt strchr \
- sysconf syslog tcgetattr times ttyname tzset unsetenv)
-
-AC_CHECK_FUNCS(vasprintf asprintf)
-AC_CHECK_FUNCS(isascii isblank isgraph isprint isspace isxdigit)
-AC_CHECK_FUNCS(getpwent getpwnam getpwuid)
-AC_REPLACE_FUNCS(getcwd memset)
-AC_REPLACE_FUNCS(strcasecmp strcasestr strerror strftime strnlen strpbrk strstr)
-AC_REPLACE_FUNCS(strtod strtol strtoul strtoll strtoull strtoimax strtoumax)
-AC_REPLACE_FUNCS(dprintf)
-AC_REPLACE_FUNCS(strchrnul)
-
-AC_CHECK_DECLS([confstr])
-AC_CHECK_DECLS([printf])
-AC_CHECK_DECLS([sbrk])
-AC_CHECK_DECLS([setregid])
-AC_CHECK_DECLS([strcpy])
-AC_CHECK_DECLS([strsignal])
-
-dnl Extra test to detect the horribly broken HP/UX 11.00 strtold(3)
-AC_CHECK_DECLS([strtold], [
- AC_MSG_CHECKING([for broken strtold])
- AC_CACHE_VAL(bash_cv_strtold_broken,
- [AC_TRY_COMPILE(
- [#include <stdlib.h>],
- [int main() { long double r; char *foo, bar; r = strtold(foo, &bar);}],
- bash_cv_strtold_broken=no, bash_cv_strtold_broken=yes,
- [AC_MSG_WARN(cannot check for broken strtold if cross-compiling, defaulting to no)])
- ]
- )
- AC_MSG_RESULT($bash_cv_strtold_broken)
- if test "$bash_cv_strtold_broken" = "yes" ; then
- AC_DEFINE(STRTOLD_BROKEN)
- fi
-])
-
-
-BASH_CHECK_DECL(strtoimax)
-BASH_CHECK_DECL(strtol)
-BASH_CHECK_DECL(strtoll)
-BASH_CHECK_DECL(strtoul)
-BASH_CHECK_DECL(strtoull)
-BASH_CHECK_DECL(strtoumax)
-
-AC_FUNC_MKTIME
-
-dnl
-dnl Checks for lib/intl and related code (uses some of the output from
-dnl AM_GNU_GETTEXT)
-dnl
-
-AC_CHECK_HEADERS([argz.h errno.h fcntl.h malloc.h stdio_ext.h])
-
-dnl AC_FUNC_MALLOC
-AC_FUNC_MMAP
-AC_CHECK_FUNCS([__argz_count __argz_next __argz_stringify dcgettext mempcpy \
- munmap stpcpy strcspn strdup])
-
-INTL_DEP= INTL_INC= LIBINTL_H=
-if test "x$USE_INCLUDED_LIBINTL" = "xyes"; then
- INTL_DEP='${INTL_LIBDIR}/libintl.a'
- INTL_INC='-I${INTL_LIBSRC} -I${INTL_BUILDDIR}'
- LIBINTL_H='${INTL_BUILDDIR}/libintl.h'
-fi
-AC_SUBST(INTL_DEP)
-AC_SUBST(INTL_INC)
-AC_SUBST(LIBINTL_H)
-
-dnl
-dnl End of checks needed by files in lib/intl
-dnl
-
-BASH_CHECK_MULTIBYTE
-
-dnl checks for the dynamic loading library functions in libc and libdl
-if test "$opt_static_link" != yes; then
-AC_CHECK_LIB(dl, dlopen)
-AC_CHECK_FUNCS(dlopen dlclose dlsym)
-fi
-
-dnl this defines HAVE_DECL_SYS_SIGLIST
-AC_DECL_SYS_SIGLIST
-
-dnl network functions -- check for inet_aton again
-if test "$ac_cv_func_inet_aton" != 'yes'; then
-BASH_FUNC_INET_ATON
-fi
-
-dnl libraries
-dnl this is reportedly no longer necessary for irix[56].?
-case "$host_os" in
-irix4*) AC_CHECK_LIB(sun, getpwent) ;;
-esac
-
-dnl check for getpeername in the socket library only if it's not in libc
-if test "$ac_cv_func_getpeername" = no; then
- BASH_CHECK_LIB_SOCKET
-fi
-dnl check for gethostbyname in socket libraries if it's not in libc
-if test "$ac_cv_func_gethostbyname" = no; then
- BASH_FUNC_GETHOSTBYNAME
-fi
-
-dnl system types
-AC_TYPE_GETGROUPS
-AC_TYPE_OFF_T
-AC_TYPE_MODE_T
-AC_TYPE_UID_T
-AC_TYPE_PID_T
-AC_TYPE_SIZE_T
-AC_CHECK_TYPE(ssize_t, int)
-AC_CHECK_TYPE(time_t, long)
-
-BASH_TYPE_LONG_LONG
-BASH_TYPE_UNSIGNED_LONG_LONG
-
-AC_TYPE_SIGNAL
-BASH_TYPE_SIG_ATOMIC_T
-
-AC_CHECK_SIZEOF(char, 1)
-AC_CHECK_SIZEOF(short, 2)
-AC_CHECK_SIZEOF(int, 4)
-AC_CHECK_SIZEOF(long, 4)
-AC_CHECK_SIZEOF(char *, 4)
-AC_CHECK_SIZEOF(double, 8)
-AC_CHECK_SIZEOF([long long], 8)
-
-AC_CHECK_TYPE(u_int, [unsigned int])
-AC_CHECK_TYPE(u_long, [unsigned long])
-
-BASH_TYPE_BITS16_T
-BASH_TYPE_U_BITS16_T
-BASH_TYPE_BITS32_T
-BASH_TYPE_U_BITS32_T
-BASH_TYPE_BITS64_T
-
-BASH_TYPE_PTRDIFF_T
-
-dnl structures
-AC_HEADER_STAT
-
-dnl system services
-AC_SYS_INTERPRETER
-if test $ac_cv_sys_interpreter = yes; then
-AC_DEFINE(HAVE_HASH_BANG_EXEC)
-fi
-
-dnl Miscellaneous Bash tests
-if test "$ac_cv_func_lstat" = "no"; then
-BASH_FUNC_LSTAT
-fi
-
-dnl behavior of system calls and library functions
-BASH_FUNC_CTYPE_NONASCII
-BASH_FUNC_DUP2_CLOEXEC_CHECK
-BASH_SYS_PGRP_SYNC
-BASH_SYS_SIGNAL_VINTAGE
-
-dnl checking for the presence of certain library symbols
-BASH_SYS_ERRLIST
-BASH_SYS_SIGLIST
-BASH_UNDER_SYS_SIGLIST
-
-dnl various system types
-BASH_TYPE_SIGHANDLER
-BASH_CHECK_TYPE(clock_t, [#include <sys/times.h>], long)
-BASH_CHECK_TYPE(sigset_t, [#include <signal.h>], int)
-BASH_CHECK_TYPE(quad_t, , long, HAVE_QUAD_T)
-BASH_CHECK_TYPE(intmax_t, , $bash_cv_type_long_long)
-BASH_CHECK_TYPE(uintmax_t, , $bash_cv_type_unsigned_long_long)
-if test "$ac_cv_header_sys_socket_h" = "yes"; then
-BASH_CHECK_TYPE(socklen_t, [#include <sys/socket.h>], int, HAVE_SOCKLEN_T)
-fi
-BASH_TYPE_RLIMIT
-
-AC_CHECK_SIZEOF(intmax_t, 8)
-
-dnl presence and contents of structures used by system calls
-BASH_STRUCT_TERMIOS_LDISC
-BASH_STRUCT_TERMIO_LDISC
-BASH_STRUCT_DIRENT_D_INO
-BASH_STRUCT_DIRENT_D_FILENO
-BASH_STRUCT_DIRENT_D_NAMLEN
-BASH_STRUCT_WINSIZE
-BASH_STRUCT_TIMEVAL
-AC_CHECK_MEMBERS([struct stat.st_blocks])
-AC_STRUCT_TM
-AC_STRUCT_TIMEZONE
-BASH_STRUCT_TIMEZONE
-
-BASH_STRUCT_WEXITSTATUS_OFFSET
-
-dnl presence and behavior of C library functions
-BASH_FUNC_STRSIGNAL
-BASH_FUNC_OPENDIR_CHECK
-BASH_FUNC_ULIMIT_MAXFDS
-BASH_FUNC_FPURGE
-BASH_FUNC_GETENV
-if test "$ac_cv_func_getcwd" = "yes"; then
-BASH_FUNC_GETCWD
-fi
-BASH_FUNC_POSIX_SETJMP
-BASH_FUNC_STRCOLL
-BASH_FUNC_SNPRINTF
-BASH_FUNC_VSNPRINTF
-
-dnl If putenv or unsetenv is not present, set the right define so the
-dnl prototype and declaration in lib/sh/getenv.c will be standard-conformant
-
-if test "$ac_cv_func_putenv" = "yes"; then
-BASH_FUNC_STD_PUTENV
-else
-AC_DEFINE(HAVE_STD_PUTENV)
-fi
-if test "$ac_cv_func_unsetenv" = "yes"; then
-BASH_FUNC_STD_UNSETENV
-else
-AC_DEFINE(HAVE_STD_UNSETENV)
-fi
-
-BASH_FUNC_PRINTF_A_FORMAT
-
-dnl presence and behavior of OS functions
-BASH_SYS_REINSTALL_SIGHANDLERS
-BASH_SYS_JOB_CONTROL_MISSING
-BASH_SYS_NAMED_PIPES
-
-dnl presence of certain CPP defines
-AC_HEADER_TIOCGWINSZ
-BASH_HAVE_TIOCSTAT
-BASH_HAVE_FIONREAD
-
-BASH_CHECK_WCONTINUED
-
-dnl miscellaneous
-BASH_CHECK_SPEED_T
-BASH_CHECK_GETPW_FUNCS
-BASH_CHECK_RTSIGS
-BASH_CHECK_SYS_SIGLIST
-
-dnl special checks
-case "$host_os" in
-hpux*) BASH_CHECK_KERNEL_RLIMIT ;;
-esac
-
-if test "$opt_readline" = yes; then
-dnl yuck
-case "$host_os" in
-aix*) prefer_curses=yes ;;
-esac
-BASH_CHECK_LIB_TERMCAP
-fi
-AC_SUBST(TERMCAP_LIB)
-AC_SUBST(TERMCAP_DEP)
-
-BASH_CHECK_DEV_FD
-BASH_CHECK_DEV_STDIN
-BASH_SYS_DEFAULT_MAIL_DIR
-
-if test "$bash_cv_job_control_missing" = missing; then
- opt_job_control=no
-fi
-
-if test "$opt_job_control" = yes; then
-AC_DEFINE(JOB_CONTROL)
-JOBS_O=jobs.o
-else
-JOBS_O=nojobs.o
-fi
-
-AC_SUBST(JOBS_O)
-
-dnl Defines that we want to propagate to the Makefiles in subdirectories,
-dnl like glob and readline
-
-LOCAL_DEFS=-DSHELL
-
-dnl use this section to possibly define more cpp variables, specify local
-dnl libraries, and specify any additional local cc or ld flags
-dnl
-dnl this should really go away someday
-
-case "${host_os}" in
-sysv4.2*) AC_DEFINE(SVR4_2)
- AC_DEFINE(SVR4) ;;
-sysv4*) AC_DEFINE(SVR4) ;;
-sysv5*) AC_DEFINE(SVR5) ;;
-hpux9*) LOCAL_CFLAGS="-DHPUX9 -DHPUX" ;;
-hpux*) LOCAL_CFLAGS=-DHPUX ;;
-dgux*) LOCAL_CFLAGS=-D_DGUX_SOURCE; LOCAL_LIBS=-ldgc ;;
-isc*) LOCAL_CFLAGS=-Disc386 ;;
-rhapsody*) LOCAL_CFLAGS=-DRHAPSODY ;;
-darwin*) LOCAL_CFLAGS=-DMACOSX ;;
-sco3.2v5*) LOCAL_CFLAGS="-b elf -DWAITPID_BROKEN -DPATH_MAX=1024" ;;
-sco3.2v4*) LOCAL_CFLAGS="-DMUST_UNBLOCK_CHLD -DPATH_MAX=1024" ;;
-sco3.2*) LOCAL_CFLAGS=-DMUST_UNBLOCK_CHLD ;;
-sunos4*) LOCAL_CFLAGS=-DSunOS4 ;;
-solaris2.5*) LOCAL_CFLAGS="-DSunOS5 -DSOLARIS" ;;
-solaris2.8*) LOCAL_CFLAGS=-DSOLARIS ;;
-solaris2.9*) LOCAL_CFLAGS=-DSOLARIS ;;
-solaris2.10*) LOCAL_CFLAGS=-DSOLARIS ;;
-solaris2*) LOCAL_CFLAGS=-DSOLARIS ;;
-lynxos*) LOCAL_CFLAGS=-DRECYCLES_PIDS ;;
-linux*) LOCAL_LDFLAGS=-rdynamic # allow dynamic loading
- case "`uname -r`" in
- 2.[[456789]]*|3*) AC_DEFINE(PGRP_PIPE) ;;
- esac ;;
-*qnx6*) LOCAL_CFLAGS="-Dqnx -Dqnx6" LOCAL_LIBS="-lncurses" ;;
-*qnx*) LOCAL_CFLAGS="-Dqnx -F -3s" LOCAL_LDFLAGS="-3s" LOCAL_LIBS="-lunix -lncurses" ;;
-powerux*) LOCAL_LIBS="-lgen" ;;
-cygwin*) LOCAL_CFLAGS=-DRECYCLES_PIDS ;;
-opennt*|interix*) LOCAL_CFLAGS="-DNO_MAIN_ENV_ARG -DBROKEN_DIRENT_D_INO -D_POSIX_SOURCE -D_ALL_SOURCE" ;;
-esac
-
-dnl Stanza for OS/compiler pair-specific flags
-case "${host_os}-${CC}" in
-aix4.2*-*gcc*) LOCAL_LDFLAGS="-Xlinker -bexpall -Xlinker -brtl" ;;
-aix4.2*) LOCAL_LDFLAGS="-bexpall -brtl" ;;
-bsdi4*-*gcc*) LOCAL_LDFLAGS="-rdynamic" ;; # allow dynamic loading, like Linux
-esac
-
-dnl FreeBSD-3.x can have either a.out or ELF
-case "${host_os}" in
-freebsd[[3-9]]*)
- if test -x /usr/bin/objformat && test "`/usr/bin/objformat`" = "elf" ; then
- LOCAL_LDFLAGS=-rdynamic # allow dynamic loading
- fi ;;
-freebsdelf*) LOCAL_LDFLAGS=-rdynamic ;; # allow dynamic loading
-dragonfly*) LOCAL_LDFLAGS=-rdynamic ;; # allow dynamic loading
-esac
-
-case "$host_cpu" in
-*cray*) LOCAL_CFLAGS="-DCRAY" ;; # shell var so config.h can use it
-esac
-
-case "$host_cpu-$host_os" in
-ibmrt-*bsd4*) LOCAL_CFLAGS="-ma -U__STDC__" ;;
-esac
-
-case "$host_cpu-$host_vendor-$host_os" in
-m88k-motorola-sysv3) LOCAL_CFLAGS=-DWAITPID_BROKEN ;;
-mips-pyramid-sysv4) LOCAL_CFLAGS=-Xa ;;
-esac
-
-#
-# Shared object configuration section. These values are generated by
-# ${srcdir}/support/shobj-conf
-#
-if test "$ac_cv_func_dlopen" = "yes" && test -f ${srcdir}/support/shobj-conf
-then
- AC_MSG_CHECKING(shared object configuration for loadable builtins)
- eval `${CONFIG_SHELL-/bin/sh} ${srcdir}/support/shobj-conf -C "${CC}" -c "${host_cpu}" -o "${host_os}" -v "${host_vendor}"`
- AC_SUBST(SHOBJ_CC)
- AC_SUBST(SHOBJ_CFLAGS)
- AC_SUBST(SHOBJ_LD)
- AC_SUBST(SHOBJ_LDFLAGS)
- AC_SUBST(SHOBJ_XLDFLAGS)
- AC_SUBST(SHOBJ_LIBS)
- AC_SUBST(SHOBJ_STATUS)
- AC_MSG_RESULT($SHOBJ_STATUS)
-fi
-
-# try to create a directory tree if the source is elsewhere
-# this should be packaged into a script accessible via ${srcdir}/support
-case "$srcdir" in
-.) ;;
-*) for d in doc tests support lib examples; do # dirs
- test -d $d || mkdir $d
- done
- for ld in readline glob tilde malloc sh termcap; do # libdirs
- test -d lib/$ld || mkdir lib/$ld
- done
- test -d examples/loadables || mkdir examples/loadables # loadable builtins
- test -d examples/loadables/perl || mkdir examples/loadables/perl
- ;;
-esac
-
-BUILD_DIR=`pwd`
-case "$BUILD_DIR" in
-*\ *) BUILD_DIR=`echo "$BUILD_DIR" | sed 's: :\\\\ :g'` ;;
-*) ;;
-esac
-
-if test -z "$localedir"; then
- localedir='${datarootdir}/locale'
-fi
-if test -z "$datarootdir"; then
- datarootdir='${prefix}/share'
-fi
-
-AC_SUBST(PROFILE_FLAGS)
-
-AC_SUBST(incdir)
-AC_SUBST(BUILD_DIR)
-
-# Some versions of autoconf don't substitute these automatically
-AC_SUBST(datarootdir)
-AC_SUBST(localedir)
-
-AC_SUBST(YACC)
-AC_SUBST(AR)
-AC_SUBST(ARFLAGS)
-
-AC_SUBST(BASHVERS)
-AC_SUBST(RELSTATUS)
-AC_SUBST(DEBUG)
-AC_SUBST(MALLOC_DEBUG)
-
-AC_SUBST(host_cpu)
-AC_SUBST(host_vendor)
-AC_SUBST(host_os)
-
-AC_SUBST(LOCAL_LIBS)
-AC_SUBST(LOCAL_CFLAGS)
-AC_SUBST(LOCAL_LDFLAGS)
-AC_SUBST(LOCAL_DEFS)
-
-#AC_SUBST(ALLOCA_SOURCE)
-#AC_SUBST(ALLOCA_OBJECT)
-
-AC_OUTPUT([Makefile builtins/Makefile lib/readline/Makefile lib/glob/Makefile \
- lib/intl/Makefile \
- lib/malloc/Makefile lib/sh/Makefile lib/termcap/Makefile \
- lib/tilde/Makefile doc/Makefile support/Makefile po/Makefile.in \
- examples/loadables/Makefile examples/loadables/perl/Makefile],
-[
-# Makefile uses this timestamp file to record whether config.h is up to date.
-echo timestamp > stamp-h
-])
+++ /dev/null
-# This file is a shell script that caches the results of configure
-# tests for CYGWIN32 so they don't need to be done when cross-compiling.
-
-# AC_FUNC_GETPGRP should also define GETPGRP_VOID
-ac_cv_func_getpgrp_void=${ac_cv_func_getpgrp_void='yes'}
-# AC_FUNC_SETVBUF_REVERSED should not define anything else
-ac_cv_func_setvbuf_reversed=${ac_cv_func_setvbuf_reversed='no'}
-# on CYGWIN32, system calls do not restart
-ac_cv_sys_restartable_syscalls=${ac_cv_sys_restartable_syscalls='no'}
-bash_cv_sys_restartable_syscalls=${bash_cv_sys_restartable_syscalls='no'}
-
-# these may be necessary, but they are currently commented out
-#ac_cv_c_bigendian=${ac_cv_c_bigendian='no'}
-ac_cv_sizeof_char_p=${ac_cv_sizeof_char_p='4'}
-ac_cv_sizeof_int=${ac_cv_sizeof_int='4'}
-ac_cv_sizeof_long=${ac_cv_sizeof_long='4'}
-ac_cv_sizeof_double=${ac_cv_sizeof_double='8'}
-
-bash_cv_dup2_broken=${bash_cv_dup2_broken='no'}
-bash_cv_pgrp_pipe=${bash_cv_pgrp_pipe='no'}
-bash_cv_type_rlimit=${bash_cv_type_rlimit='long'}
-bash_cv_decl_under_sys_siglist=${bash_cv_decl_under_sys_siglist='no'}
-bash_cv_under_sys_siglist=${bash_cv_under_sys_siglist='no'}
-bash_cv_sys_siglist=${bash_cv_sys_siglist='no'}
-bash_cv_opendir_not_robust=${bash_cv_opendir_not_robust='no'}
-bash_cv_getenv_redef=${bash_cv_getenv_redef='yes'}
-bash_cv_printf_declared=${bash_cv_printf_declared='yes'}
-bash_cv_ulimit_maxfds=${bash_cv_ulimit_maxfds='no'}
-bash_cv_getcwd_calls_popen=${bash_cv_getcwd_calls_popen='no'}
-bash_cv_must_reinstall_sighandlers=${bash_cv_must_reinstall_sighandlers='no'}
-bash_cv_job_control_missing=${bash_cv_job_control_missing='present'}
-bash_cv_sys_named_pipes=${bash_cv_sys_named_pipes='missing'}
-bash_cv_func_sigsetjmp=${bash_cv_func_sigsetjmp='missing'}
-bash_cv_mail_dir=${bash_cv_mail_dir='unknown'}
-bash_cv_func_strcoll_broken=${bash_cv_func_strcoll_broken='no'}
-
-bash_cv_type_int32_t=${bash_cv_type_int32_t='int'}
-bash_cv_type_u_int32_t=${bash_cv_type_u_int32_t='int'}
-
-ac_cv_type_bits64_t=${ac_cv_type_bits64_t='no'}
-
-# end of cross-build/cygwin32.cache
+++ /dev/null
-This is the Bash FAQ, version 3.24, for Bash version 2.05b.
-
-This document contains a set of frequently-asked questions concerning
-Bash, the GNU Bourne-Again Shell. Bash is a freely-available command
-interpreter with advanced features for both interactive use and shell
-programming.
-
-Another good source of basic information about shells is the collection
-of FAQ articles periodically posted to comp.unix.shell.
-
-Questions and comments concerning this document should be sent to
-chet@po.cwru.edu.
-
-This document is available for anonymous FTP with the URL
-
-ftp://ftp.cwru.edu/pub/bash/FAQ
-
-The Bash home page is http://cnswww.cns.cwru.edu/~chet/bash/bashtop.html
-
-----------
-Contents:
-
-Section A: The Basics
-
-A1) What is it?
-A2) What's the latest version?
-A3) Where can I get it?
-A4) On what machines will bash run?
-A5) Will bash run on operating systems other than Unix?
-A6) How can I build bash with gcc?
-A7) How can I make bash my login shell?
-A8) I just changed my login shell to bash, and now I can't FTP into my
- machine. Why not?
-A9) What's the `POSIX 1003.2 standard'?
-A10) What is the bash `posix mode'?
-
-Section B: The latest version
-
-B1) What's new in version 2.05b?
-B2) Are there any user-visible incompatibilities between bash-2.05b and
- bash-1.14.7?
-
-Section C: Differences from other Unix shells
-
-C1) How does bash differ from sh, the Bourne shell?
-C2) How does bash differ from the Korn shell, version ksh88?
-C3) Which new features in ksh-93 are not in bash, and which are?
-
-Section D: Why does bash do some things differently than other Unix shells?
-
-D1) Why does bash run a different version of `command' than
- `which command' says it will?
-D2) Why doesn't bash treat brace expansions exactly like csh?
-D3) Why doesn't bash have csh variable modifiers?
-D4) How can I make my csh aliases work when I convert to bash?
-D5) How can I pipe standard output and standard error from one command to
- another, like csh does with `|&'?
-D6) Now that I've converted from ksh to bash, are there equivalents to
- ksh features like autoloaded functions and the `whence' command?
-
-Section E: Why does bash do certain things the way it does?
-
-E1) Why is the bash builtin `test' slightly different from /bin/test?
-E2) Why does bash sometimes say `Broken pipe'?
-E3) When I have terminal escape sequences in my prompt, why does bash
- wrap lines at the wrong column?
-E4) If I pipe the output of a command into `read variable', why doesn't
- the output show up in $variable when the read command finishes?
-E5) I have a bunch of shell scripts that use backslash-escaped characters
- in arguments to `echo'. Bash doesn't interpret these characters. Why
- not, and how can I make it understand them?
-E6) Why doesn't a while or for loop get suspended when I type ^Z?
-E7) What about empty for loops in Makefiles?
-E8) Why does the arithmetic evaluation code complain about `08'?
-E9) Why does the pattern matching expression [A-Z]* match files beginning
- with every letter except `z'?
-E10) Why does `cd //' leave $PWD as `//'?
-E11) If I resize my xterm while another program is running, why doesn't bash
- notice the change?
-
-Section F: Things to watch out for on certain Unix versions
-
-F1) Why can't I use command line editing in my `cmdtool'?
-F2) I built bash on Solaris 2. Why do globbing expansions and filename
- completion chop off the first few characters of each filename?
-F3) Why does bash dump core after I interrupt username completion or
- `~user' tilde expansion on a machine running NIS?
-F4) I'm running SVR4.2. Why is the line erased every time I type `@'?
-F5) Why does bash report syntax errors when my C News scripts use a
- redirection before a subshell command?
-F6) Why can't I use vi-mode editing on Red Hat Linux 6.1?
-F7) Why do bash-2.05a and bash-2.05b fail to compile `printf.def' on
- HP/UX 11.x?
-
-Section G: How can I get bash to do certain common things?
-
-G1) How can I get bash to read and display eight-bit characters?
-G2) How do I write a function `x' to replace builtin command `x', but
- still invoke the command from within the function?
-G3) How can I find the value of a shell variable whose name is the value
- of another shell variable?
-G4) How can I make the bash `time' reserved word print timing output that
- looks like the output from my system's /usr/bin/time?
-G5) How do I get the current directory into my prompt?
-G6) How can I rename "*.foo" to "*.bar"?
-G7) How can I translate a filename from uppercase to lowercase?
-G8) How can I write a filename expansion (globbing) pattern that will match
- all files in the current directory except "." and ".."?
-
-Section H: Where do I go from here?
-
-H1) How do I report bugs in bash, and where should I look for fixes and
- advice?
-H2) What kind of bash documentation is there?
-H3) What's coming in future versions?
-H4) What's on the bash `wish list'?
-H5) When will the next release appear?
-
-----------
-Section A: The Basics
-
-A1) What is it?
-
-Bash is a Unix command interpreter (shell). It is an implementation of
-the Posix 1003.2 shell standard, and resembles the Korn and System V
-shells.
-
-Bash contains a number of enhancements over those shells, both
-for interactive use and shell programming. Features geared
-toward interactive use include command line editing, command
-history, job control, aliases, and prompt expansion. Programming
-features include additional variable expansions, shell
-arithmetic, and a number of variables and options to control
-shell behavior.
-
-Bash was originally written by Brian Fox of the Free Software
-Foundation. The current developer and maintainer is Chet Ramey
-of Case Western Reserve University.
-
-A2) What's the latest version?
-
-The latest version is 2.05b, first made available on Wednesday, 17
-July, 2002.
-
-A3) Where can I get it?
-
-Bash is the GNU project's shell, and so is available from the
-master GNU archive site, ftp.gnu.org, and its mirrors. The
-latest version is also available for FTP from ftp.cwru.edu.
-The following URLs tell how to get version 2.05b:
-
-ftp://ftp.gnu.org/pub/gnu/bash/bash-2.05b.tar.gz
-ftp://ftp.cwru.edu/pub/bash/bash-2.05b.tar.gz
-
-Formatted versions of the documentation are available with the URLs:
-
-ftp://ftp.gnu.org/pub/gnu/bash/bash-doc-2.05b.tar.gz
-ftp://ftp.cwru.edu/pub/bash/bash-doc-2.05b.tar.gz
-
-A4) On what machines will bash run?
-
-Bash has been ported to nearly every version of UNIX. All you
-should have to do to build it on a machine for which a port
-exists is to type `configure' and then `make'. The build process
-will attempt to discover the version of UNIX you have and tailor
-itself accordingly, using a script created by GNU autoconf.
-
-More information appears in the file `INSTALL' in the distribution.
-
-The Bash web page (http://cnswww.cns.cwru.edu/~chet/bash/bashtop.html)
-explains how to obtain binary versions of bash for most of the major
-commercial Unix systems.
-
-A5) Will bash run on operating systems other than Unix?
-
-Configuration specifics for Unix-like systems such as QNX and
-LynxOS are included in the distribution. Bash-2.05 and later
-versions should compile and run on Minix 2.0 (patches were
-contributed), but I don't believe anyone has built bash-2.x on
-earlier Minix versions yet.
-
-Bash has been ported to versions of Windows implementing the Win32
-programming interface. This includes Windows 95 and Windows NT.
-The port was done by Cygnus Solutions as part of their CYGWIN
-project. For more information about the project, look at the URLs
-
-http://www.cygwin.com/
-http://sourceware.cygnus.com/cygwin
-
-Cygnus originally ported bash-1.14.7, and that port was part of their
-early GNU-Win32 (the original name) releases. Cygnus has also done a
-port of bash-2.05 to the CYGWIN environment, and it is available as
-part of their current release.
-
-Bash-2.05b should require no local Cygnus changes to build and run under
-CYGWIN.
-
-The Cygnus port works only on Intel machines. There is a port of bash
-(I don't know which version) to the alpha/NT environment available from
-
-ftp://ftp.gnustep.org//pub/win32/bash-alpha-nt-1.01.tar.gz
-
-DJ Delorie has a port of bash-2.x which runs under MS-DOS, as part
-of the DJGPP project. For more information on the project, see
-
-http://www.delorie.com/djgpp/
-
-I have been told that the original DJGPP port was done by Daisuke Aoyama.
-
-Mark Elbrecht <snowball3@bigfoot.com> has sent me notice that bash-2.04
-is available for DJGPP V2. The files are available as:
-
-ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bsh204b.zip binary
-ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bsh204d.zip documentation
-ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bsh204s.zip source
-
-Mark has begun to work with bash-2.05, but I don't know the status.
-
-Ports of bash-1.12 and bash-2.0 are available for OS/2 from
-
-ftp://hobbes.nmsu.edu/pub/os2/util/shell/bash_112.zip
-ftp://hobbes.nmsu.edu/pub/os2/util/shell/bash-2.0(253).zip
-
-I haven't looked at either, but the second appears to be a binary-only
-distribution. Beware.
-
-I have received word that Bash (I'm not sure which version, but I
-believe that it's at least bash-2.02.1) is the standard shell on
-BeOS.
-
-A6) How can I build bash with gcc?
-
-Bash configures to use gcc by default if it is available. Read the
-file INSTALL in the distribution for more information.
-
-A7) How can I make bash my login shell?
-
-Some machines let you use `chsh' to change your login shell. Other
-systems use `passwd -s' or `passwd -e'. If one of these works for
-you, that's all you need. Note that many systems require the full
-pathname to a shell to appear in /etc/shells before you can make it
-your login shell. For this, you may need the assistance of your
-friendly local system administrator.
-
-If you cannot do this, you can still use bash as your login shell, but
-you need to perform some tricks. The basic idea is to add a command
-to your login shell's startup file to replace your login shell with
-bash.
-
-For example, if your login shell is csh or tcsh, and you have installed
-bash in /usr/gnu/bin/bash, add the following line to ~/.login:
-
- if ( -f /usr/gnu/bin/bash ) exec /usr/gnu/bin/bash --login
-
-(the `--login' tells bash that it is a login shell).
-
-It's not a good idea to put this command into ~/.cshrc, because every
-csh you run without the `-f' option, even ones started to run csh scripts,
-reads that file. If you must put the command in ~/.cshrc, use something
-like
-
- if ( $?prompt ) exec /usr/gnu/bin/bash --login
-
-to ensure that bash is exec'd only when the csh is interactive.
-
-If your login shell is sh or ksh, you have to do two things.
-
-First, create an empty file in your home directory named `.bash_profile'.
-The existence of this file will prevent the exec'd bash from trying to
-read ~/.profile, and re-execing itself over and over again. ~/.bash_profile
-is the first file bash tries to read initialization commands from when
-it is invoked as a login shell.
-
-Next, add a line similar to the above to ~/.profile:
-
- [ -f /usr/gnu/bin/bash ] && [ -x /usr/gnu/bin/bash ] && \
- exec /usr/gnu/bin/bash --login
-
-This will cause login shells to replace themselves with bash running as
-a login shell. Once you have this working, you can copy your initialization
-code from ~/.profile to ~/.bash_profile.
-
-I have received word that the recipe supplied above is insufficient for
-machines running CDE. CDE has a maze of twisty little startup files, all
-slightly different.
-
-If you cannot change your login shell in the password file to bash, you
-will have to (apparently) live with CDE using the shell in the password
-file to run its startup scripts. If you have changed your shell to bash,
-there is code in the CDE startup files (on Solaris, at least) that attempts
-to do the right thing. It is, however, often broken, and may require that
-you use the $BASH_ENV trick described below.
-
-`dtterm' claims to use $SHELL as the default program to start, so if you
-can change $SHELL in the CDE startup files, you should be able to use bash
-in your terminal windows.
-
-Setting DTSOURCEPROFILE in ~/.dtprofile will cause the `Xsession' program
-to read your login shell's startup files. You may be able to use bash for
-the rest of the CDE programs by setting SHELL to bash in ~/.dtprofile as
-well, but I have not tried this.
-
-You can use the above `exec' recipe to start bash when not logging in with
-CDE by testing the value of the DT variable:
-
- if [ -n "$DT" ]; then
- [ -f /usr/gnu/bin/bash ] && exec /usr/gnu/bin/bash --login
- fi
-
-If CDE starts its shells non-interactively during login, the login shell
-startup files (~/.profile, ~/.bash_profile) will not be sourced at login.
-To get around this problem, append a line similar to the following to your
-~/.dtprofile:
-
- BASH_ENV=${HOME}/.bash_profile ; export BASH_ENV
-
-and add the following line to the beginning of ~/.bash_profile:
-
- unset BASH_ENV
-
-A8) I just changed my login shell to bash, and now I can't FTP into my
- machine. Why not?
-
-You must add the full pathname to bash to the file /etc/shells. As
-noted in the answer to the previous question, many systems require
-this before you can make bash your login shell.
-
-Most versions of ftpd use this file to prohibit `special' users
-such as `uucp' and `news' from using FTP.
-
-A9) What's the `POSIX 1003.2 standard'?
-
-POSIX is a name originally coined by Richard Stallman for a
-family of open system standards based on UNIX. There are a
-number of aspects of UNIX under consideration for
-standardization, from the basic system services at the system
-call and C library level to applications and tools to system
-administration and management. Each area of standardization is
-assigned to a working group in the 1003 series.
-
-The POSIX Shell and Utilities standard has been developed by IEEE
-Working Group 1003.2 (POSIX.2). It concentrates on the command
-interpreter interface and utility programs commonly executed from
-the command line or by other programs. An initial version of the
-standard has been approved and published by the IEEE, and work is
-currently underway to update it.
-
-Bash is concerned with the aspects of the shell's behavior
-defined by POSIX.2. The shell command language has of course
-been standardized, including the basic flow control and program
-execution constructs, I/O redirection and pipelining, argument
-handling, variable expansion, and quoting.
-
-The `special' builtins, which must be implemented as part of the
-shell to provide the desired functionality, are specified as
-being part of the shell; examples of these are `eval' and
-`export'. Other utilities appear in the sections of POSIX.2 not
-devoted to the shell which are commonly (and in some cases must
-be) implemented as builtin commands, such as `read' and `test'.
-POSIX.2 also specifies aspects of the shell's interactive
-behavior as part of the UPE, including job control and command
-line editing. Only vi-style line editing commands have been
-standardized; emacs editing commands were left out due to
-objections.
-
-The Open Group has made an older version of its Single Unix
-Specification (version 2), which is very similar to POSIX.2,
-available on the web at
-
-http://www.opengroup.org/onlinepubs/007908799/
-
-The Single Unix Specification, version 3, is available on the web at
-
-http://www.opengroup.org/onlinepubs/007904975/
-
-A10) What is the bash `posix mode'?
-
-Although bash is an implementation of the POSIX.2 shell
-specification, there are areas where the bash default behavior
-differs from that spec. The bash `posix mode' changes the bash
-behavior in these areas so that it obeys the spec more closely.
-
-Posix mode is entered by starting bash with the --posix or
-'-o posix' option or executing `set -o posix' after bash is running.
-
-The specific aspects of bash which change when posix mode is
-active are listed in the file POSIX in the bash distribution.
-They are also listed in a section in the Bash Reference Manual
-(from which that file is generated).
-
-Section B: The latest version
-
-B1) What's new in version 2.05b?
-
-The raison d'etre for bash-2.05b is to make a second intermediate
-release containing the first of the new features to be available
-in bash-3.0 and get feedback on those features before proceeding.
-The major new feature is multibyte character support in both Bash
-and Readline.
-
-Bash-2.05b contains the following new features (see the manual page for
-complete descriptions and the CHANGES and NEWS files in the bash-2.05b
-distribution):
-
-o support for multibyte characters has been added to both bash and readline
-
-o the DEBUG trap is now run *before* simple commands, ((...)) commands,
- [[...]] conditional commands, and for ((...)) loops
-
-o the shell now performs arithmetic in the largest integer size the machine
- supports (intmax_t)
-
-o there is a new \D{...} prompt expansion; passes the `...' to strftime(3)
- and inserts the result into the expanded prompt
-
-o there is a new `here-string' redirection operator: <<< word
-
-o when displaying variables, function attributes and definitions are shown
- separately, allowing them to be re-used as input (attempting to re-use
- the old output would result in syntax errors).
-
-o `read' has a new `-u fd' option to read from a specified file descriptor
-
-o the bash debugger in examples/bashdb has been modified to work with the
- new DEBUG trap semantics, the command set has been made more gdb-like,
- and the changes to $LINENO make debugging functions work better
-
-o the expansion of $LINENO inside a shell function is only relative to the
- function start if the shell is interactive -- if the shell is running a
- script, $LINENO expands to the line number in the script. This is as
- POSIX-2001 requires
-
-
-A short feature history dating from Bash-2.0:
-
-Bash-2.05a introduced the following new features:
-
-o The `printf' builtin has undergone major work
-
-o There is a new read-only `shopt' option: login_shell, which is set by
- login shells and unset otherwise
-
-o New `\A' prompt string escape sequence; expanding to time in 24-hour
- HH:MM format
-
-o New `-A group/-g' option to complete and compgen; goes group name
- completion
-
-o New [+-]O invocation option to set and unset `shopt' options at startup
-
-o ksh-like `ERR' trap
-
-o `for' loops now allow empty word lists after the `in' reserved word
-
-o new `hard' and `soft' arguments for the `ulimit' builtin
-
-o Readline can be configured to place the user at the same point on the line
- when retrieving commands from the history list
-
-o Readline can be configured to skip `hidden' files (filenames with a leading
- `.' on Unix) when performing completion
-
-Bash-2.05 introduced the following new features:
-
-o This version has once again reverted to using locales and strcoll(3) when
- processing pattern matching bracket expressions, as POSIX requires.
-o Added a new `--init-file' invocation argument as a synonym for `--rcfile',
- per the new GNU coding standards.
-o The /dev/tcp and /dev/udp redirections now accept service names as well as
- port numbers.
-o `complete' and `compgen' now take a `-o value' option, which controls some
- of the aspects of that compspec. Valid values are:
-
- default - perform bash default completion if programmable
- completion produces no matches
- dirnames - perform directory name completion if programmable
- completion produces no matches
- filenames - tell readline that the compspec produces filenames,
- so it can do things like append slashes to
- directory names and suppress trailing spaces
-o A new loadable builtin, realpath, which canonicalizes and expands symlinks
- in pathname arguments.
-o When `set' is called without options, it prints function defintions in a
- way that allows them to be reused as input. This affects `declare' and
- `declare -p' as well. This only happens when the shell is not in POSIX
- mode, since POSIX.2 forbids this behavior.
-
-Bash-2.04 introduced the following new features:
-
-o Programmable word completion with the new `complete' and `compgen' builtins;
- examples are provided in examples/complete/complete-examples
-o `history' has a new `-d' option to delete a history entry
-o `bind' has a new `-x' option to bind key sequences to shell commands
-o The prompt expansion code has new `\j' and `\l' escape sequences
-o The `no_empty_cmd_completion' shell option, if enabled, inhibits
- command completion when TAB is typed on an empty line
-o `help' has a new `-s' option to print a usage synopsis
-o New arithmetic operators: var++, var--, ++var, --var, expr1,expr2 (comma)
-o New ksh93-style arithmetic for command:
- for ((expr1 ; expr2; expr3 )); do list; done
-o `read' has new options: `-t', `-n', `-d', `-s'
-o The redirection code handles several filenames specially: /dev/fd/N,
- /dev/stdin, /dev/stdout, /dev/stderr
-o The redirection code now recognizes /dev/tcp/HOST/PORT and
- /dev/udp/HOST/PORT and tries to open a TCP or UDP socket, respectively,
- to the specified port on the specified host
-o The ${!prefix*} expansion has been implemented
-o A new FUNCNAME variable, which expands to the name of a currently-executing
- function
-o The GROUPS variable is no longer readonly
-o A new shopt `xpg_echo' variable, to control the behavior of echo with
- respect to backslash-escape sequences at runtime
-o The NON_INTERACTIVE_LOGIN_SHELLS #define has returned
-
-The version of Readline released with Bash-2.04, Readline-4.1, had several
-new features as well:
-
-o Parentheses matching is always compiled into readline, and controllable
- with the new `blink-matching-paren' variable
-o The history-search-forward and history-search-backward functions now leave
- point at the end of the line when the search string is empty, like
- reverse-search-history, and forward-search-history
-o A new function for applications: rl_on_new_line_with_prompt()
-o New variables for applications: rl_already_prompted, and rl_gnu_readline_p
-
-
-Bash-2.03 had very few new features, in keeping with the convention
-that odd-numbered releases provide mainly bug fixes. A number of new
-features were added to Readline, mostly at the request of the Cygnus
-folks.
-
-A new shopt option, `restricted_shell', so that startup files can test
- whether or not the shell was started in restricted mode
-Filename generation is now performed on the words between ( and ) in
- compound array assignments (this is really a bug fix)
-OLDPWD is now auto-exported, as POSIX.2 requires
-ENV and BASH_ENV are read-only variables in a restricted shell
-Bash may now be linked against an already-installed Readline library,
- as long as the Readline library is version 4 or newer
-All shells begun with the `--login' option will source the login shell
- startup files, even if the shell is not interactive
-
-There were lots of changes to the version of the Readline library released
-along with Bash-2.03. For a complete list of the changes, read the file
-CHANGES in the Bash-2.03 distribution.
-
-Bash-2.02 contained the following new features:
-
-a new version of malloc (based on the old GNU malloc code in previous
- bash versions) that is more page-oriented, more conservative
- with memory usage, does not `orphan' large blocks when they
- are freed, is usable on 64-bit machines, and has allocation
- checking turned on unconditionally
-POSIX.2-style globbing character classes ([:alpha:], [:alnum:], etc.)
-POSIX.2-style globbing equivalence classes
-POSIX.2-style globbing collating symbols
-the ksh [[...]] extended conditional command
-the ksh egrep-style extended pattern matching operators
-a new `printf' builtin
-the ksh-like $(<filename) command substitution, which is equivalent to
- $(cat filename)
-new tilde prefixes that expand to directories from the directory stack
-new `**' arithmetic operator to do exponentiation
-case-insensitive globbing (filename expansion)
-menu completion a la tcsh
-`magic-space' history expansion function like tcsh
-the readline inputrc `language' has a new file inclusion directive ($include)
-
-Bash-2.01 contained only a few new features:
-
-new `GROUPS' builtin array variable containing the user's group list
-new bindable readline commands: history-and-alias-expand-line and
- alias-expand-line
-
-Bash-2.0 contained extensive changes and new features from bash-1.14.7.
-Here's a short list:
-
-new `time' reserved word to time pipelines, shell builtins, and
- shell functions
-one-dimensional arrays with a new compound assignment statement,
- appropriate expansion constructs and modifications to some
- of the builtins (read, declare, etc.) to use them
-new quoting syntaxes for ANSI-C string expansion and locale-specific
- string translation
-new expansions to do substring extraction, pattern replacement, and
- indirect variable expansion
-new builtins: `disown' and `shopt'
-new variables: HISTIGNORE, SHELLOPTS, PIPESTATUS, DIRSTACK, GLOBIGNORE,
- MACHTYPE, BASH_VERSINFO
-special handling of many unused or redundant variables removed
- (e.g., $notify, $glob_dot_filenames, $no_exit_on_failed_exec)
-dynamic loading of new builtin commands; many loadable examples provided
-new prompt expansions: \a, \e, \n, \H, \T, \@, \v, \V
-history and aliases available in shell scripts
-new readline variables: enable-keypad, mark-directories, input-meta,
- visible-stats, disable-completion, comment-begin
-new readline commands to manipulate the mark and operate on the region
-new readline emacs mode commands and bindings for ksh-88 compatibility
-updated and extended builtins
-new DEBUG trap
-expanded (and now documented) restricted shell mode
-
-implementation stuff:
-autoconf-based configuration
-nearly all of the bugs reported since version 1.14 have been fixed
-most builtins converted to use builtin `getopt' for consistency
-most builtins use -p option to display output in a reusable form
- (for consistency)
-grammar tighter and smaller (66 reduce-reduce conflicts gone)
-lots of code now smaller and faster
-test suite greatly expanded
-
-B2) Are there any user-visible incompatibilities between bash-2.05b and
- bash-1.14.7?
-
-There are a few incompatibilities between version 1.14.7 and version 2.05b.
-They are detailed in the file COMPAT in the bash distribution. That file
-is not meant to be all-encompassing; send mail to bash-maintainers@gnu.org
-if if you find something that's not mentioned there.
-
-Section C: Differences from other Unix shells
-
-C1) How does bash differ from sh, the Bourne shell?
-
-This is a non-comprehensive list of features that differentiate bash
-from the SVR4.2 shell. The bash manual page explains these more
-completely.
-
-Things bash has that sh does not:
- long invocation options
- [+-]O invocation option
- -l invocation option
- `!' reserved word to invert pipeline return value
- `time' reserved word to time pipelines and shell builtins
- the `function' reserved word
- the `select' compound command and reserved word
- arithmetic for command: for ((expr1 ; expr2; expr3 )); do list; done
- new $'...' and $"..." quoting
- the $(...) form of command substitution
- the $(<filename) form of command substitution, equivalent to
- $(cat filename)
- the ${#param} parameter value length operator
- the ${!param} indirect parameter expansion operator
- the ${!param*} prefix expansion operator
- the ${param:offset[:length]} parameter substring operator
- the ${param/pat[/string]} parameter pattern substitution operator
- expansions to perform substring removal (${p%[%]w}, ${p#[#]w})
- expansion of positional parameters beyond $9 with ${num}
- variables: BASH, BASH_VERSION, BASH_VERSINFO, UID, EUID, REPLY,
- TIMEFORMAT, PPID, PWD, OLDPWD, SHLVL, RANDOM, SECONDS,
- LINENO, HISTCMD, HOSTTYPE, OSTYPE, MACHTYPE, HOSTNAME,
- ENV, PS3, PS4, DIRSTACK, PIPESTATUS, HISTSIZE, HISTFILE,
- HISTFILESIZE, HISTCONTROL, HISTIGNORE, GLOBIGNORE, GROUPS,
- PROMPT_COMMAND, FCEDIT, FIGNORE, IGNOREEOF, INPUTRC,
- SHELLOPTS, OPTERR, HOSTFILE, TMOUT, FUNCNAME, histchars,
- auto_resume
- DEBUG trap
- ERR trap
- variable arrays with new compound assignment syntax
- redirections: <>, &>, >|, <<<, [n]<&word-, [n]>&word-
- prompt string special char translation and variable expansion
- auto-export of variables in initial environment
- command search finds functions before builtins
- bash return builtin will exit a file sourced with `.'
- builtins: cd -/-L/-P, exec -l/-c/-a, echo -e/-E, hash -d/-l/-p/-t.
- export -n/-f/-p/name=value, pwd -L/-P,
- read -e/-p/-a/-t/-n/-d/-s/-u,
- readonly -a/-f/name=value, trap -l, set +o,
- set -b/-m/-o option/-h/-p/-B/-C/-H/-P,
- unset -f/-v, ulimit -m/-p/-u,
- type -a/-p/-t/-f/-P, suspend -f, kill -n,
- test -o optname/s1 == s2/s1 < s2/s1 > s2/-nt/-ot/-ef/-O/-G/-S
- bash reads ~/.bashrc for interactive shells, $ENV for non-interactive
- bash restricted shell mode is more extensive
- bash allows functions and variables with the same name
- brace expansion
- tilde expansion
- arithmetic expansion with $((...)) and `let' builtin
- the `[[...]]' extended conditional command
- process substitution
- aliases and alias/unalias builtins
- local variables in functions and `local' builtin
- readline and command-line editing with programmable completion
- command history and history/fc builtins
- csh-like history expansion
- other new bash builtins: bind, command, compgen, complete, builtin,
- declare/typeset, dirs, enable, fc, help,
- history, logout, popd, pushd, disown, shopt,
- printf
- exported functions
- filename generation when using output redirection (command >a*)
- POSIX.2-style globbing character classes
- POSIX.2-style globbing equivalence classes
- POSIX.2-style globbing collating symbols
- egrep-like extended pattern matching operators
- case-insensitive pattern matching and globbing
- variable assignments preceding commands affect only that command,
- even for builtins and functions
- posix mode
- redirection to /dev/fd/N, /dev/stdin, /dev/stdout, /dev/stderr,
- /dev/tcp/host/port, /dev/udp/host/port
-
-Things sh has that bash does not:
- uses variable SHACCT to do shell accounting
- includes `stop' builtin (bash can use alias stop='kill -s STOP')
- `newgrp' builtin
- turns on job control if called as `jsh'
- $TIMEOUT (like bash $TMOUT)
- `^' is a synonym for `|'
- new SVR4.2 sh builtins: mldmode, priv
-
-Implementation differences:
- redirection to/from compound commands causes sh to create a subshell
- bash does not allow unbalanced quotes; sh silently inserts them at EOF
- bash does not mess with signal 11
- sh sets (euid, egid) to (uid, gid) if -p not supplied and uid < 100
- bash splits only the results of expansions on IFS, using POSIX.2
- field splitting rules; sh splits all words on IFS
- sh does not allow MAILCHECK to be unset (?)
- sh does not allow traps on SIGALRM or SIGCHLD
- bash allows multiple option arguments when invoked (e.g. -x -v);
- sh allows only a single option argument (`sh -x -v' attempts
- to open a file named `-v', and, on SunOS 4.1.4, dumps core.
- On Solaris 2.4 and earlier versions, sh goes into an infinite
- loop.)
- sh exits a script if any builtin fails; bash exits only if one of
- the POSIX.2 `special' builtins fails
-
-C2) How does bash differ from the Korn shell, version ksh88?
-
-Things bash has or uses that ksh88 does not:
- long invocation options
- [-+]O invocation option
- -l invocation option
- `!' reserved word
- arithmetic for command: for ((expr1 ; expr2; expr3 )); do list; done
- arithmetic in largest machine-supported size (intmax_t)
- posix mode and posix conformance
- command hashing
- tilde expansion for assignment statements that look like $PATH
- process substitution with named pipes if /dev/fd is not available
- the ${!param} indirect parameter expansion operator
- the ${!param*} prefix expansion operator
- the ${param:offset[:length]} parameter substring operator
- the ${param/pat[/string]} parameter pattern substitution operator
- variables: BASH, BASH_VERSION, BASH_VERSINFO, UID, EUID, SHLVL,
- TIMEFORMAT, HISTCMD, HOSTTYPE, OSTYPE, MACHTYPE,
- HISTFILESIZE, HISTIGNORE, HISTCONTROL, PROMPT_COMMAND,
- IGNOREEOF, FIGNORE, INPUTRC, HOSTFILE, DIRSTACK,
- PIPESTATUS, HOSTNAME, OPTERR, SHELLOPTS, GLOBIGNORE,
- GROUPS, FUNCNAME, histchars, auto_resume
- prompt expansion with backslash escapes and command substitution
- redirection: &> (stdout and stderr), <<<, [n]<&word-, [n]>&word-
- more extensive and extensible editing and programmable completion
- builtins: bind, builtin, command, declare, dirs, echo -e/-E, enable,
- exec -l/-c/-a, fc -s, export -n/-f/-p, hash, help, history,
- jobs -x/-r/-s, kill -s/-n/-l, local, logout, popd, pushd,
- read -e/-p/-a/-t/-n/-d/-s, readonly -a/-n/-f/-p,
- set -o braceexpand/-o histexpand/-o interactive-comments/
- -o notify/-o physical/-o posix/-o hashall/-o onecmd/
- -h/-B/-C/-b/-H/-P, set +o, suspend, trap -l, type,
- typeset -a/-F/-p, ulimit -u, umask -S, alias -p, shopt,
- disown, printf, complete, compgen
- `!' csh-style history expansion
- POSIX.2-style globbing character classes
- POSIX.2-style globbing equivalence classes
- POSIX.2-style globbing collating symbols
- egrep-like extended pattern matching operators
- case-insensitive pattern matching and globbing
- `**' arithmetic operator to do exponentiation
- redirection to /dev/fd/N, /dev/stdin, /dev/stdout, /dev/stderr
- arrays of unlimited size
- TMOUT is default timeout for `read' and `select'
-
-Things ksh88 has or uses that bash does not:
- tracked aliases (alias -t)
- variables: ERRNO, FPATH, EDITOR, VISUAL
- co-processes (|&, >&p, <&p)
- weirdly-scoped functions
- typeset +f to list all function names without definitions
- text of command history kept in a file, not memory
- builtins: alias -x, cd old new, fc -e -, newgrp, print,
- read -p/-s/var?prompt, set -A/-o gmacs/
- -o bgnice/-o markdirs/-o nolog/-o trackall/-o viraw/-s,
- typeset -H/-L/-R/-Z/-A/-ft/-fu/-fx/-l/-u/-t, whence
- using environment to pass attributes of exported variables
- arithmetic evaluation done on arguments to some builtins
- reads .profile from $PWD when invoked as login shell
-
-Implementation differences:
- ksh runs last command of a pipeline in parent shell context
- bash has brace expansion by default (ksh88 compile-time option)
- bash has fixed startup file for all interactive shells; ksh reads $ENV
- bash has exported functions
- bash command search finds functions before builtins
- bash waits for all commands in pipeline to exit before returning status
- emacs-mode editing has some slightly different key bindings
-
-C3) Which new features in ksh-93 are not in bash, and which are?
-
-New things in ksh-93 not in bash-2.05b:
- associative arrays
- floating point arithmetic and variables
- math library functions
- ${!name[sub]} name of subscript for associative array
- `.' is allowed in variable names to create a hierarchical namespace
- more extensive compound assignment syntax
- discipline functions
- `sleep' and `getconf' builtins (bash has loadable versions)
- typeset -n and `nameref' variables
- KEYBD trap
- variables: .sh.edchar, .sh.edmode, .sh.edcol, .sh.edtext, .sh.version,
- .sh.name, .sh.subscript, .sh.value, .sh.match, HISTEDIT
- backreferences in pattern matching (\N)
- `&' operator in pattern lists for matching
- print -f (bash uses printf)
- `fc' has been renamed to `hist'
- `.' can execute shell functions
- exit statuses between 0 and 255
- set -o pipefail
- `+=' variable assignment operator
- FPATH and PATH mixing
- getopts -a
- -I invocation option
- DEBUG trap now executed before each simple command, instead of after
- printf %H, %P, %T, %Z modifiers, output base for %d
- lexical scoping for local variables in `ksh' functions
- no scoping for local variables in `POSIX' functions
-
-New things in ksh-93 present in bash-2.05b:
- [n]<&word- and [n]>&word- redirections (combination dup and close)
- for (( expr1; expr2; expr3 )) ; do list; done - arithmetic for command
- ?:, ++, --, `expr1 , expr2' arithmetic operators
- expansions: ${!param}, ${param:offset[:len]}, ${param/pat[/str]},
- ${!param*}
- compound array assignment
- the `!' reserved word
- loadable builtins -- but ksh uses `builtin' while bash uses `enable'
- `command', `builtin', `disown' builtins
- new $'...' and $"..." quoting
- FIGNORE (but bash uses GLOBIGNORE), HISTCMD
- set -o notify/-C
- changes to kill builtin
- read -A (bash uses read -a)
- read -t/-d
- trap -p
- exec -c/-a
- `.' restores the positional parameters when it completes
- POSIX.2 `test'
- umask -S
- unalias -a
- command and arithmetic substitution performed on PS1, PS4, and ENV
- command name completion
- ENV processed only for interactive shells
-
-Section D: Why does bash do some things differently than other Unix shells?
-
-D1) Why does bash run a different version of `command' than
- `which command' says it will?
-
-On many systems, `which' is actually a csh script that assumes
-you're running csh. In tcsh, `which' and its cousin `where'
-are builtins. On other Unix systems, `which' is a perl script
-that uses the PATH environment variable.
-
-The csh script version reads the csh startup files from your
-home directory and uses those to determine which `command' will
-be invoked. Since bash doesn't use any of those startup files,
-there's a good chance that your bash environment differs from
-your csh environment. The bash `type' builtin does everything
-`which' does, and will report correct results for the running
-shell. If you're really wedded to the name `which', try adding
-the following function definition to your .bashrc:
-
- which()
- {
- builtin type "$@"
- }
-
-If you're moving from tcsh and would like to bring `where' along
-as well, use this function:
-
- where()
- {
- builtin type -a "$@"
- }
-
-D2) Why doesn't bash treat brace expansions exactly like csh?
-
-The only difference between bash and csh brace expansion is that
-bash requires a brace expression to contain at least one unquoted
-comma if it is to be expanded. Any brace-surrounded word not
-containing an unquoted comma is left unchanged by the brace
-expansion code. This affords the greatest degree of sh
-compatibility.
-
-Bash, ksh, zsh, and pd-ksh all implement brace expansion this way.
-
-D3) Why doesn't bash have csh variable modifiers?
-
-Posix has specified a more powerful, albeit somewhat more cryptic,
-mechanism cribbed from ksh, and bash implements it.
-
-${parameter%word}
- Remove smallest suffix pattern. The WORD is expanded to produce
- a pattern. It then expands to the value of PARAMETER, with the
- smallest portion of the suffix matched by the pattern deleted.
-
- x=file.c
- echo ${x%.c}.o
- -->file.o
-
-${parameter%%word}
-
- Remove largest suffix pattern. The WORD is expanded to produce
- a pattern. It then expands to the value of PARAMETER, with the
- largest portion of the suffix matched by the pattern deleted.
-
- x=posix/src/std
- echo ${x%%/*}
- -->posix
-
-${parameter#word}
- Remove smallest prefix pattern. The WORD is expanded to produce
- a pattern. It then expands to the value of PARAMETER, with the
- smallest portion of the prefix matched by the pattern deleted.
-
- x=$HOME/src/cmd
- echo ${x#$HOME}
- -->/src/cmd
-
-${parameter##word}
- Remove largest prefix pattern. The WORD is expanded to produce
- a pattern. It then expands to the value of PARAMETER, with the
- largest portion of the prefix matched by the pattern deleted.
-
- x=/one/two/three
- echo ${x##*/}
- -->three
-
-
-Given
- a=/a/b/c/d
- b=b.xxx
-
- csh bash result
- --- ---- ------
- $a:h ${a%/*} /a/b/c
- $a:t ${a##*/} d
- $b:r ${b%.*} b
- $b:e ${b##*.} xxx
-
-
-D4) How can I make my csh aliases work when I convert to bash?
-
-Bash uses a different syntax to support aliases than csh does.
-The details can be found in the documentation. We have provided
-a shell script which does most of the work of conversion for you;
-this script can be found in ./examples/misc/aliasconv.sh. Here is
-how you use it:
-
-Start csh in the normal way for you. (e.g., `csh')
-
-Pipe the output of `alias' through `aliasconv.sh', saving the
-results into `bash_aliases':
-
- alias | bash aliasconv.sh >bash_aliases
-
-Edit `bash_aliases', carefully reading through any created
-functions. You will need to change the names of some csh specific
-variables to the bash equivalents. The script converts $cwd to
-$PWD, $term to $TERM, $home to $HOME, $user to $USER, and $prompt
-to $PS1. You may also have to add quotes to avoid unwanted
-expansion.
-
-For example, the csh alias:
-
- alias cd 'cd \!*; echo $cwd'
-
-is converted to the bash function:
-
- cd () { command cd "$@"; echo $PWD ; }
-
-The only thing that needs to be done is to quote $PWD:
-
- cd () { command cd "$@"; echo "$PWD" ; }
-
-Merge the edited file into your ~/.bashrc.
-
-There is an additional, more ambitious, script in
-examples/misc/cshtobash that attempts to convert your entire csh
-environment to its bash equivalent. This script can be run as
-simply `cshtobash' to convert your normal interactive
-environment, or as `cshtobash ~/.login' to convert your login
-environment.
-
-D5) How can I pipe standard output and standard error from one command to
- another, like csh does with `|&'?
-
-Use
- command 2>&1 | command2
-
-The key is to remember that piping is performed before redirection, so
-file descriptor 1 points to the pipe when it is duplicated onto file
-descriptor 2.
-
-D6) Now that I've converted from ksh to bash, are there equivalents to
- ksh features like autoloaded functions and the `whence' command?
-
-There are features in ksh-88 and ksh-93 that do not have direct bash
-equivalents. Most, however, can be emulated with very little trouble.
-
-ksh-88 feature Bash equivalent
--------------- ---------------
-compiled-in aliases set up aliases in .bashrc; some ksh aliases are
- bash builtins (hash, history, type)
-coprocesses named pipe pairs (one for read, one for write)
-typeset +f declare -F
-cd, print, whence function substitutes in examples/functions/kshenv
-autoloaded functions examples/functions/autoload is the same as typeset -fu
-read var?prompt read -p prompt var
-
-ksh-93 feature Bash equivalent
--------------- ---------------
-sleep, getconf Bash has loadable versions in examples/loadables
-${.sh.version} $BASH_VERSION
-print -f printf
-hist alias hist=fc
-$HISTEDIT $FCEDIT
-
-Section E: How can I get bash to do certain things, and why does bash do
- things the way it does?
-
-E1) Why is the bash builtin `test' slightly different from /bin/test?
-
-The specific example used here is [ ! x -o x ], which is false.
-
-Bash's builtin `test' implements the Posix.2 spec, which can be
-summarized as follows (the wording is due to David Korn):
-
-Here is the set of rules for processing test arguments.
-
- 0 Args: False
- 1 Arg: True iff argument is not null.
- 2 Args: If first arg is !, True iff second argument is null.
- If first argument is unary, then true if unary test is true
- Otherwise error.
- 3 Args: If second argument is a binary operator, do binary test of $1 $3
- If first argument is !, negate two argument test of $2 $3
- If first argument is `(' and third argument is `)', do the
- one-argument test of the second argument.
- Otherwise error.
- 4 Args: If first argument is !, negate three argument test of $2 $3 $4.
- Otherwise unspecified
- 5 or more Args: unspecified. (Historical shells would use their
- current algorithm).
-
-The operators -a and -o are considered binary operators for the purpose
-of the 3 Arg case.
-
-As you can see, the test becomes (not (x or x)), which is false.
-
-E2) Why does bash sometimes say `Broken pipe'?
-
-If a sequence of commands appears in a pipeline, and one of the
-reading commands finishes before the writer has finished, the
-writer receives a SIGPIPE signal. Many other shells special-case
-SIGPIPE as an exit status in the pipeline and do not report it.
-For example, in:
-
- ps -aux | head
-
-`head' can finish before `ps' writes all of its output, and ps
-will try to write on a pipe without a reader. In that case, bash
-will print `Broken pipe' to stderr when ps is killed by a
-SIGPIPE.
-
-You can build a version of bash that will not report SIGPIPE errors
-by uncommenting the definition of DONT_REPORT_SIGPIPE in the file
-config-top.h.
-
-E3) When I have terminal escape sequences in my prompt, why does bash
- wrap lines at the wrong column?
-
-Readline, the line editing library that bash uses, does not know
-that the terminal escape sequences do not take up space on the
-screen. The redisplay code assumes, unless told otherwise, that
-each character in the prompt is a `printable' character that
-takes up one character position on the screen.
-
-You can use the bash prompt expansion facility (see the PROMPTING
-section in the manual page) to tell readline that sequences of
-characters in the prompt strings take up no screen space.
-
-Use the \[ escape to begin a sequence of non-printing characters,
-and the \] escape to signal the end of such a sequence.
-
-E4) If I pipe the output of a command into `read variable', why doesn't
- the output show up in $variable when the read command finishes?
-
-This has to do with the parent-child relationship between Unix
-processes. It affects all commands run in pipelines, not just
-simple calls to `read'. For example, piping a command's output
-into a `while' loop that repeatedly calls `read' will result in
-the same behavior.
-
-Each element of a pipeline runs in a separate process, a child of
-the shell running the pipeline. A subprocess cannot affect its
-parent's environment. When the `read' command sets the variable
-to the input, that variable is set only in the subshell, not the
-parent shell. When the subshell exits, the value of the variable
-is lost.
-
-Many pipelines that end with `read variable' can be converted
-into command substitutions, which will capture the output of
-a specified command. The output can then be assigned to a
-variable:
-
- grep ^gnu /usr/lib/news/active | wc -l | read ngroup
-
-can be converted into
-
- ngroup=$(grep ^gnu /usr/lib/news/active | wc -l)
-
-This does not, unfortunately, work to split the text among
-multiple variables, as read does when given multiple variable
-arguments. If you need to do this, you can either use the
-command substitution above to read the output into a variable
-and chop up the variable using the bash pattern removal
-expansion operators or use some variant of the following
-approach.
-
-Say /usr/local/bin/ipaddr is the following shell script:
-
-#! /bin/sh
-host `hostname` | awk '/address/ {print $NF}'
-
-Instead of using
-
- /usr/local/bin/ipaddr | read A B C D
-
-to break the local machine's IP address into separate octets, use
-
- OIFS="$IFS"
- IFS=.
- set -- $(/usr/local/bin/ipaddr)
- IFS="$OIFS"
- A="$1" B="$2" C="$3" D="$4"
-
-Beware, however, that this will change the shell's positional
-parameters. If you need them, you should save them before doing
-this.
-
-This is the general approach -- in most cases you will not need to
-set $IFS to a different value.
-
-Some other user-supplied alternatives include:
-
-read A B C D << HERE
- $(IFS=.; echo $(/usr/local/bin/ipaddr))
-HERE
-
-and, where process substitution is available,
-
-read A B C D < <(IFS=.; echo $(/usr/local/bin/ipaddr))
-
-E5) I have a bunch of shell scripts that use backslash-escaped characters
- in arguments to `echo'. Bash doesn't interpret these characters. Why
- not, and how can I make it understand them?
-
-This is the behavior of echo on most Unix System V machines.
-
-The bash builtin `echo' is modeled after the 9th Edition
-Research Unix version of `echo'. It does not interpret
-backslash-escaped characters in its argument strings by default;
-it requires the use of the -e option to enable the
-interpretation. The System V echo provides no way to disable the
-special characters; the bash echo has a -E option to disable
-them.
-
-There is a configuration option that will make bash behave like
-the System V echo and interpret things like `\t' by default. Run
-configure with the --enable-xpg-echo-default option to turn this
-on. Be aware that this will cause some of the tests run when you
-type `make tests' to fail.
-
-There is a shell option, `xpg_echo', settable with `shopt', that will
-change the behavior of echo at runtime. Enabling this option turns
-on expansion of backslash-escape sequences.
-
-E6) Why doesn't a while or for loop get suspended when I type ^Z?
-
-This is a consequence of how job control works on Unix. The only
-thing that can be suspended is the process group. This is a single
-command or pipeline of commands that the shell forks and executes.
-
-When you run a while or for loop, the only thing that the shell forks
-and executes are any commands in the while loop test and commands in
-the loop bodies. These, therefore, are the only things that can be
-suspended when you type ^Z.
-
-If you want to be able to stop the entire loop, you need to put it
-within parentheses, which will force the loop into a subshell that
-may be stopped (and subsequently restarted) as a single unit.
-
-E7) What about empty for loops in Makefiles?
-
-It's fairly common to see constructs like this in automatically-generated
-Makefiles:
-
-SUBDIRS = @SUBDIRS@
-
- ...
-
-subdirs-clean:
- for d in ${SUBDIRS}; do \
- ( cd $$d && ${MAKE} ${MFLAGS} clean ) \
- done
-
-When SUBDIRS is empty, this results in a command like this being passed to
-bash:
-
- for d in ; do
- ( cd $d && ${MAKE} ${MFLAGS} clean )
- done
-
-In versions of bash before bash-2.05a, this was a syntax error. If the
-reserved word `in' was present, a word must follow it before the semicolon
-or newline. The language in the manual page referring to the list of words
-being empty referred to the list after it is expanded. These versions of
-bash required that there be at least one word following the `in' when the
-construct was parsed.
-
-The idiomatic Makefile solution is something like:
-
-SUBDIRS = @SUBDIRS@
-
-subdirs-clean:
- subdirs=$SUBDIRS ; for d in $$subdirs; do \
- ( cd $$d && ${MAKE} ${MFLAGS} clean ) \
- done
-
-The latest drafts of the updated POSIX standard have changed this: the
-word list is no longer required. Bash versions 2.05a and later accept
-the new syntax.
-
-E8) Why does the arithmetic evaluation code complain about `08'?
-
-The bash arithmetic evaluation code (used for `let', $(()), (()), and in
-other places), interprets a leading `0' in numeric constants as denoting
-an octal number, and a leading `0x' as denoting hexadecimal. This is
-in accordance with the POSIX.2 spec, section 2.9.2.1, which states that
-arithmetic constants should be handled as signed long integers as defined
-by the ANSI/ISO C standard.
-
-The POSIX.2 interpretation committee has confirmed this:
-
-http://www.pasc.org/interps/unofficial/db/p1003.2/pasc-1003.2-173.html
-
-E9) Why does the pattern matching expression [A-Z]* match files beginning
- with every letter except `z'?
-
-Bash-2.03, Bash-2.05 and later versions honor the current locale setting
-when processing ranges within pattern matching bracket expressions ([A-Z]).
-This is what POSIX.2 and SUSv3/XPG6 specify.
-
-The behavior of the matcher in bash-2.05 and later versions depends on the
-current LC_COLLATE setting. Setting this variable to `C' or `POSIX' will
-result in the traditional behavior ([A-Z] matches all uppercase ASCII
-characters). Many other locales, including the en_US locale (the default
-on many US versions of Linux) collate the upper and lower case letters like
-this:
-
- AaBb...Zz
-
-which means that [A-Z] matches every letter except `z'. Others collate like
-
- aAbBcC...zZ
-
-which means that [A-Z] matches every letter except `a'.
-
-The portable way to specify upper case letters is [:upper:] instead of
-A-Z; lower case may be specified as [:lower:] instead of a-z.
-
-Look at the manual pages for setlocale(3), strcoll(3), and, if it is
-present, locale(1). If you have locale(1), you can use it to find
-your current locale information even if you do not have any of the
-LC_ variables set.
-
-My advice is to put
-
- export LC_COLLATE=C
-
-into /etc/profile and inspect any shell scripts run from cron for
-constructs like [A-Z]. This will prevent things like
-
- rm [A-Z]*
-
-from removing every file in the current directory except those beginning
-with `z' and still allow individual users to change the collation order.
-Users may put the above command into their own profiles as well, of course.
-
-E10) Why does `cd //' leave $PWD as `//'?
-
-POSIX.2, in its description of `cd', says that *three* or more leading
-slashes may be replaced with a single slash when canonicalizing the
-current working directory.
-
-This is, I presume, for historical compatibility. Certain versions of
-Unix, and early network file systems, used paths of the form
-//hostname/path to access `path' on server `hostname'.
-
-E11) If I resize my xterm while another program is running, why doesn't bash
- notice the change?
-
-This is another issue that deals with job control.
-
-The kernel maintains a notion of a current terminal process group. Members
-of this process group (processes whose process group ID is equal to the
-current terminal process group ID) receive terminal-generated signals like
-SIGWINCH. (For more details, see the JOB CONTROL section of the bash
-man page.)
-
-If a terminal is resized, the kernel sends SIGWINCH to each member of
-the terminal's current process group (the `foreground' process group).
-
-When bash is running with job control enabled, each pipeline (which may be
-a single command) is run in its own process group, different from bash's
-process group. This foreground process group receives the SIGWINCH; bash
-does not. Bash has no way of knowing that the terminal has been resized.
-
-There is a `checkwinsize' option, settable with the `shopt' builtin, that
-will cause bash to check the window size and adjust its idea of the
-terminal's dimensions each time a process stops or exits and returns control
-of the terminal to bash. Enable it with `shopt -s checkwinsize'.
-
-Section F: Things to watch out for on certain Unix versions
-
-F1) Why can't I use command line editing in my `cmdtool'?
-
-The problem is `cmdtool' and bash fighting over the input. When
-scrolling is enabled in a cmdtool window, cmdtool puts the tty in
-`raw mode' to permit command-line editing using the mouse for
-applications that cannot do it themselves. As a result, bash and
-cmdtool each try to read keyboard input immediately, with neither
-getting enough of it to be useful.
-
-This mode also causes cmdtool to not implement many of the
-terminal functions and control sequences appearing in the
-`sun-cmd' termcap entry. For a more complete explanation, see
-that file examples/suncmd.termcap in the bash distribution.
-
-`xterm' is a better choice, and gets along with bash much more
-smoothly.
-
-If you must use cmdtool, you can use the termcap description in
-examples/suncmd.termcap. Set the TERMCAP variable to the terminal
-description contained in that file, i.e.
-
-TERMCAP='Mu|sun-cmd:am:bs:km:pt:li#34:co#80:cl=^L:ce=\E[K:cd=\E[J:rs=\E[s:'
-
-Then export TERMCAP and start a new cmdtool window from that shell.
-The bash command-line editing should behave better in the new
-cmdtool. If this works, you can put the assignment to TERMCAP
-in your bashrc file.
-
-F2) I built bash on Solaris 2. Why do globbing expansions and filename
- completion chop off the first few characters of each filename?
-
-This is the consequence of building bash on SunOS 5 and linking
-with the libraries in /usr/ucblib, but using the definitions
-and structures from files in /usr/include.
-
-The actual conflict is between the dirent structure in
-/usr/include/dirent.h and the struct returned by the version of
-`readdir' in libucb.a (a 4.3-BSD style `struct direct').
-
-Make sure you've got /usr/ccs/bin ahead of /usr/ucb in your $PATH
-when configuring and building bash. This will ensure that you
-use /usr/ccs/bin/cc or acc instead of /usr/ucb/cc and that you
-link with libc before libucb.
-
-If you have installed the Sun C compiler, you may also need to
-put /usr/ccs/bin and /opt/SUNWspro/bin into your $PATH before
-/usr/ucb.
-
-F3) Why does bash dump core after I interrupt username completion or
- `~user' tilde expansion on a machine running NIS?
-
-This is a famous and long-standing bug in the SunOS YP (sorry, NIS)
-client library, which is part of libc.
-
-The YP library code keeps static state -- a pointer into the data
-returned from the server. When YP initializes itself (setpwent),
-it looks at this pointer and calls free on it if it's non-null.
-So far, so good.
-
-If one of the YP functions is interrupted during getpwent (the
-exact function is interpretwithsave()), and returns NULL, the
-pointer is freed without being reset to NULL, and the function
-returns. The next time getpwent is called, it sees that this
-pointer is non-null, calls free, and the bash free() blows up
-because it's being asked to free freed memory.
-
-The traditional Unix mallocs allow memory to be freed multiple
-times; that's probably why this has never been fixed. You can
-run configure with the `--without-gnu-malloc' option to use
-the C library malloc and avoid the problem.
-
-F4) I'm running SVR4.2. Why is the line erased every time I type `@'?
-
-The `@' character is the default `line kill' character in most
-versions of System V, including SVR4.2. You can change this
-character to whatever you want using `stty'. For example, to
-change the line kill character to control-u, type
-
- stty kill ^U
-
-where the `^' and `U' can be two separate characters.
-
-F5) Why does bash report syntax errors when my C News scripts use a
- redirection before a subshell command?
-
-The actual command in question is something like
-
- < file ( command )
-
-According to the grammar given in the POSIX.2 standard, this construct
-is, in fact, a syntax error. Redirections may only precede `simple
-commands'. A subshell construct such as the above is one of the shell's
-`compound commands'. A redirection may only follow a compound command.
-
-This affects the mechanical transformation of commands that use `cat'
-to pipe a file into a command (a favorite Useless-Use-Of-Cat topic on
-comp.unix.shell). While most commands of the form
-
- cat file | command
-
-can be converted to `< file command', shell control structures such as
-loops and subshells require `command < file'.
-
-The file CWRU/sh-redir-hack in the bash-2.05a distribution is an
-(unofficial) patch to parse.y that will modify the grammar to
-support this construct. It will not apply with `patch'; you must
-modify parse.y by hand. Note that if you apply this, you must
-recompile with -DREDIRECTION_HACK. This introduces a large
-number of reduce/reduce conflicts into the shell grammar.
-
-F6) Why can't I use vi-mode editing on Red Hat Linux 6.1?
-
-The short answer is that Red Hat screwed up.
-
-The long answer is that they shipped an /etc/inputrc that only works
-for emacs mode editing, and then screwed all the vi users by setting
-INPUTRC to /etc/inputrc in /etc/profile.
-
-The short fix is to do one of the following: remove or rename
-/etc/inputrc, set INPUTRC=~/.inputrc in ~/.bashrc (or .bash_profile,
-but make sure you export it if you do), remove the assignment to
-INPUTRC from /etc/profile, add
-
- set keymap emacs
-
-to the beginning of /etc/inputrc, or bracket the key bindings in
-/etc/inputrc with these lines
-
- $if mode=emacs
- [...]
- $endif
-
-F7) Why do bash-2.05a and bash-2.05b fail to compile `printf.def' on
- HP/UX 11.x?
-
-HP/UX's support for long double is imperfect at best.
-
-GCC will support it without problems, but the HP C library functions
-like strtold(3) and printf(3) don't actually work with long doubles.
-HP implemented a `long_double' type as a 4-element array of 32-bit
-ints, and that is what the library functions use. The ANSI C
-`long double' type is a 128-bit floating point scalar.
-
-The easiest fix, until HP fixes things up, is to edit the generated
-config.h and #undef the HAVE_LONG_DOUBLE line. After doing that,
-the compilation should complete successfully.
-
-Section G: How can I get bash to do certain common things?
-
-G1) How can I get bash to read and display eight-bit characters?
-
-This is a process requiring several steps.
-
-First, you must ensure that the `physical' data path is a full eight
-bits. For xterms, for example, the `vt100' resources `eightBitInput'
-and `eightBitOutput' should be set to `true'.
-
-Once you have set up an eight-bit path, you must tell the kernel and
-tty driver to leave the eighth bit of characters alone when processing
-keyboard input. Use `stty' to do this:
-
- stty cs8 -istrip -parenb
-
-For old BSD-style systems, you can use
-
- stty pass8
-
-You may also need
-
- stty even odd
-
-Finally, you need to tell readline that you will be inputting and
-displaying eight-bit characters. You use readline variables to do
-this. These variables can be set in your .inputrc or using the bash
-`bind' builtin. Here's an example using `bind':
-
- bash$ bind 'set convert-meta off'
- bash$ bind 'set meta-flag on'
- bash$ bind 'set output-meta on'
-
-The `set' commands between the single quotes may also be placed
-in ~/.inputrc.
-
-G2) How do I write a function `x' to replace builtin command `x', but
- still invoke the command from within the function?
-
-This is why the `command' and `builtin' builtins exist. The
-`command' builtin executes the command supplied as its first
-argument, skipping over any function defined with that name. The
-`builtin' builtin executes the builtin command given as its first
-argument directly.
-
-For example, to write a function to replace `cd' that writes the
-hostname and current directory to an xterm title bar, use
-something like the following:
-
- cd()
- {
- builtin cd "$@" && xtitle "$HOST: $PWD"
- }
-
-This could also be written using `command' instead of `builtin';
-the version above is marginally more efficient.
-
-G3) How can I find the value of a shell variable whose name is the value
- of another shell variable?
-
-Versions of Bash newer than Bash-2.0 support this directly. You can use
-
- ${!var}
-
-For example, the following sequence of commands will echo `z':
-
- var1=var2
- var2=z
- echo ${!var1}
-
-For sh compatibility, use the `eval' builtin. The important
-thing to remember is that `eval' expands the arguments you give
-it again, so you need to quote the parts of the arguments that
-you want `eval' to act on.
-
-For example, this expression prints the value of the last positional
-parameter:
-
- eval echo \"\$\{$#\}\"
-
-The expansion of the quoted portions of this expression will be
-deferred until `eval' runs, while the `$#' will be expanded
-before `eval' is executed. In versions of bash later than bash-2.0,
-
- echo ${!#}
-
-does the same thing.
-
-This is not the same thing as ksh93 `nameref' variables, though the syntax
-is similar. I may add namerefs in a future bash version.
-
-G4) How can I make the bash `time' reserved word print timing output that
- looks like the output from my system's /usr/bin/time?
-
-The bash command timing code looks for a variable `TIMEFORMAT' and
-uses its value as a format string to decide how to display the
-timing statistics.
-
-The value of TIMEFORMAT is a string with `%' escapes expanded in a
-fashion similar in spirit to printf(3). The manual page explains
-the meanings of the escape sequences in the format string.
-
-If TIMEFORMAT is not set, bash acts as if the following assignment had
-been performed:
-
- TIMEFORMAT=$'\nreal\t%3lR\nuser\t%3lU\nsys\t%3lS'
-
-The POSIX.2 default time format (used by `time -p command') is
-
- TIMEFORMAT=$'real %2R\nuser %2U\nsys %2S'
-
-The BSD /usr/bin/time format can be emulated with:
-
- TIMEFORMAT=$'\t%1R real\t%1U user\t%1S sys'
-
-The System V /usr/bin/time format can be emulated with:
-
- TIMEFORMAT=$'\nreal\t%1R\nuser\t%1U\nsys\t%1S'
-
-The ksh format can be emulated with:
-
- TIMEFORMAT=$'\nreal\t%2lR\nuser\t%2lU\nsys\t%2lS'
-
-G5) How do I get the current directory into my prompt?
-
-Bash provides a number of backslash-escape sequences which are expanded
-when the prompt string (PS1 or PS2) is displayed. The full list is in
-the manual page.
-
-The \w expansion gives the full pathname of the current directory, with
-a tilde (`~') substituted for the current value of $HOME. The \W
-expansion gives the basename of the current directory. To put the full
-pathname of the current directory into the path without any tilde
-subsitution, use $PWD. Here are some examples:
-
- PS1='\w$ ' # current directory with tilde
- PS1='\W$ ' # basename of current directory
- PS1='$PWD$ ' # full pathname of current directory
-
-The single quotes are important in the final example to prevent $PWD from
-being expanded when the assignment to PS1 is performed.
-
-G6) How can I rename "*.foo" to "*.bar"?
-
-Use the pattern removal functionality described in D3. The following `for'
-loop will do the trick:
-
- for f in *.foo; do
- mv $f ${f%foo}bar
- done
-
-G7) How can I translate a filename from uppercase to lowercase?
-
-The script examples/functions/lowercase, originally written by John DuBois,
-will do the trick. The converse is left as an exercise.
-
-G8) How can I write a filename expansion (globbing) pattern that will match
- all files in the current directory except "." and ".."?
-
-You must have set the `extglob' shell option using `shopt -s extglob' to use
-this:
-
- echo .!(.|) *
-
-A solution that works without extended globbing is given in the Unix Shell
-FAQ, posted periodically to comp.unix.shell.
-
-Section H: Where do I go from here?
-
-H1) How do I report bugs in bash, and where should I look for fixes and
- advice?
-
-Use the `bashbug' script to report bugs. It is built and
-installed at the same time as bash. It provides a standard
-template for reporting a problem and automatically includes
-information about your configuration and build environment.
-
-`bashbug' sends its reports to bug-bash@gnu.org, which
-is a large mailing list gatewayed to the usenet newsgroup gnu.bash.bug.
-
-Bug fixes, answers to questions, and announcements of new releases
-are all posted to gnu.bash.bug. Discussions concerning bash features
-and problems also take place there.
-
-To reach the bash maintainers directly, send mail to
-bash-maintainers@gnu.org.
-
-H2) What kind of bash documentation is there?
-
-First, look in the doc directory in the bash distribution. It should
-contain at least the following files:
-
-bash.1 an extensive, thorough Unix-style manual page
-builtins.1 a manual page covering just bash builtin commands
-bashref.texi a reference manual in GNU tex`info format
-bashref.info an info version of the reference manual
-FAQ this file
-article.ms text of an article written for The Linux Journal
-readline.3 a man page describing readline
-
-Postscript, HTML, and ASCII files created from the above source are
-available in the documentation distribution.
-
-There is additional documentation available for anonymous FTP from host
-ftp.cwru.edu in the `pub/bash' directory.
-
-Cameron Newham and Bill Rosenblatt have written a book on bash, published
-by O'Reilly and Associates. The book is based on Bill Rosenblatt's Korn
-Shell book. The title is ``Learning the Bash Shell'', and the ISBN number
-is 1-56592-147-X. Look for it in fine bookstores near you. This book
-covers bash-1.14, but has an appendix describing some of the new features
-in bash-2.0.
-
-A second edition of this book is available, published in January, 1998.
-The ISBN number is 1-56592-347-2. Look for it in the same fine bookstores
-or on the web.
-
-The GNU Bash Reference Manual has been published as a printed book by
-Network Theory Ltd (Paperback, ISBN: 0-9541617-7-7, Feb 2003). It covers
-bash-2.0 and is available from most online bookstores (see
-http://www.network-theory.co.uk/bash/manual/ for details). The publisher
-will donate $1 to the Free Software Foundation for each copy sold.
-
-H3) What's coming in future versions?
-
-These are features I hope to include in a future version of bash.
-
-a better bash debugger (a minimally-tested version is included with bash-2.05b)
-associative arrays
-co-processes, but with a new-style syntax that looks like function declaration
-
-H4) What's on the bash `wish list' for future versions?
-
-These are features that may or may not appear in a future version of bash.
-
-breaking some of the shell functionality into embeddable libraries
-a module system like zsh's, using dynamic loading like builtins
-better internationalization using GNU `gettext'
-date-stamped command history
-a bash programmer's guide with a chapter on creating loadable builtins
-a better loadable interface to perl with access to the shell builtins and
- variables (contributions gratefully accepted)
-ksh93-like `nameref' variables
-ksh93-like `+=' variable assignment operator
-ksh93-like `xx.yy' variables (including some of the .sh.* variables) and
- associated disipline functions
-Some of the new ksh93 pattern matching operators, like backreferencing
-
-H5) When will the next release appear?
-
-The next version will appear sometime in 2002. Never make predictions.
-
-
-This document is Copyright 1995-2003 by Chester Ramey.
-
-Permission is hereby granted, without written agreement and
-without license or royalty fees, to use, copy, and distribute
-this document for any purpose, provided that the above copyright
-notice appears in all copies of this document and that the
-contents of this document remain unaltered.
+++ /dev/null
-.\"
-.\" MAN PAGE COMMENTS to
-.\"
-.\" Chet Ramey
-.\" Case Western Reserve University
-.\" chet@po.cwru.edu
-.\"
-.\" Last Change: Mon May 9 12:23:35 EDT 2011
-.\"
-.\" bash_builtins, strip all but Built-Ins section
-.if \n(zZ=1 .ig zZ
-.if \n(zY=1 .ig zY
-.TH BASH 1 "2011 June 24" "GNU Bash 4.2"
-.\"
-.\" There's some problem with having a `@'
-.\" in a tagged paragraph with the BSD man macros.
-.\" It has to do with `@' appearing in the }1 macro.
-.\" This is a problem on 4.3 BSD and Ultrix, but Sun
-.\" appears to have fixed it.
-.\" If you're seeing the characters
-.\" `@u-3p' appearing before the lines reading
-.\" `possible-hostname-completions
-.\" and `complete-hostname' down in READLINE,
-.\" then uncomment this redefinition.
-.\"
-.de }1
-.ds ]X \&\\*(]B\\
-.nr )E 0
-.if !"\\$1"" .nr )I \\$1n
-.}f
-.ll \\n(LLu
-.in \\n()Ru+\\n(INu+\\n()Iu
-.ti \\n(INu
-.ie !\\n()Iu+\\n()Ru-\w\a\\*(]X\au-3p \{\\*(]X
-.br\}
-.el \\*(]X\h\a|\\n()Iu+\\n()Ru\a\c
-.}f
-..
-.\"
-.\" File Name macro. This used to be `.PN', for Path Name,
-.\" but Sun doesn't seem to like that very much.
-.\"
-.de FN
-\fI\|\\$1\|\fP
-..
-.SH NAME
-bash \- GNU Bourne-Again SHell
-.SH SYNOPSIS
-.B bash
-[options]
-[file]
-.SH COPYRIGHT
-.if n Bash is Copyright (C) 1989-2011 by the Free Software Foundation, Inc.
-.if t Bash is Copyright \(co 1989-2011 by the Free Software Foundation, Inc.
-.SH DESCRIPTION
-.B Bash
-is an \fBsh\fR-compatible command language interpreter that
-executes commands read from the standard input or from a file.
-.B Bash
-also incorporates useful features from the \fIKorn\fP and \fIC\fP
-shells (\fBksh\fP and \fBcsh\fP).
-.PP
-.B Bash
-is intended to be a conformant implementation of the
-Shell and Utilities portion of the IEEE POSIX specification
-(IEEE Standard 1003.1).
-.B Bash
-can be configured to be POSIX-conformant by default.
-.SH OPTIONS
-All of the single-character shell options documented in the
-description of the \fBset\fR builtin command can be used as options
-when the shell is invoked.
-In addition, \fBbash\fR
-interprets the following options when it is invoked:
-.PP
-.PD 0
-.TP 10
-.BI \-c "\| string\^"
-If the
-.B \-c
-option is present, then commands are read from
-.IR string .
-If there are arguments after the
-.IR string ,
-they are assigned to the positional parameters, starting with
-.BR $0 .
-.TP
-.B \-i
-If the
-.B \-i
-option is present, the shell is
-.IR interactive .
-.TP
-.B \-l
-Make
-.B bash
-act as if it had been invoked as a login shell (see
-.SM
-.B INVOCATION
-below).
-.TP
-.B \-r
-If the
-.B \-r
-option is present, the shell becomes
-.I restricted
-(see
-.SM
-.B "RESTRICTED SHELL"
-below).
-.TP
-.B \-s
-If the
-.B \-s
-option is present, or if no arguments remain after option
-processing, then commands are read from the standard input.
-This option allows the positional parameters to be set
-when invoking an interactive shell.
-.TP
-.B \-D
-A list of all double-quoted strings preceded by \fB$\fP
-is printed on the standard output.
-These are the strings that
-are subject to language translation when the current locale
-is not \fBC\fP or \fBPOSIX\fP.
-This implies the \fB\-n\fP option; no commands will be executed.
-.TP
-.B [\-+]O [\fIshopt_option\fP]
-\fIshopt_option\fP is one of the shell options accepted by the
-\fBshopt\fP builtin (see
-.SM
-.B SHELL BUILTIN COMMANDS
-below).
-If \fIshopt_option\fP is present, \fB\-O\fP sets the value of that option;
-\fB+O\fP unsets it.
-If \fIshopt_option\fP is not supplied, the names and values of the shell
-options accepted by \fBshopt\fP are printed on the standard output.
-If the invocation option is \fB+O\fP, the output is displayed in a format
-that may be reused as input.
-.TP
-.B \-\-
-A
-.B \-\-
-signals the end of options and disables further option processing.
-Any arguments after the
-.B \-\-
-are treated as filenames and arguments. An argument of
-.B \-
-is equivalent to \fB\-\-\fP.
-.PD
-.PP
-.B Bash
-also interprets a number of multi-character options.
-These options must appear on the command line before the
-single-character options to be recognized.
-.PP
-.PD 0
-.TP
-.B \-\-debugger
-Arrange for the debugger profile to be executed before the shell
-starts.
-Turns on extended debugging mode (see the description of the
-.B extdebug
-option to the
-.B shopt
-builtin below).
-.TP
-.B \-\-dump\-po\-strings
-Equivalent to \fB\-D\fP, but the output is in the GNU \fIgettext\fP
-\fBpo\fP (portable object) file format.
-.TP
-.B \-\-dump\-strings
-Equivalent to \fB\-D\fP.
-.TP
-.B \-\-help
-Display a usage message on standard output and exit successfully.
-.TP
-\fB\-\-init\-file\fP \fIfile\fP
-.PD 0
-.TP
-\fB\-\-rcfile\fP \fIfile\fP
-.PD
-Execute commands from
-.I file
-instead of the standard personal initialization file
-.I ~/.bashrc
-if the shell is interactive (see
-.SM
-.B INVOCATION
-below).
-.TP
-.B \-\-login
-Equivalent to \fB\-l\fP.
-.TP
-.B \-\-noediting
-Do not use the GNU
-.B readline
-library to read command lines when the shell is interactive.
-.TP
-.B \-\-noprofile
-Do not read either the system-wide startup file
-.FN /etc/profile
-or any of the personal initialization files
-.IR ~/.bash_profile ,
-.IR ~/.bash_login ,
-or
-.IR ~/.profile .
-By default,
-.B bash
-reads these files when it is invoked as a login shell (see
-.SM
-.B INVOCATION
-below).
-.TP
-.B \-\-norc
-Do not read and execute the personal initialization file
-.I ~/.bashrc
-if the shell is interactive.
-This option is on by default if the shell is invoked as
-.BR sh .
-.TP
-.B \-\-posix
-Change the behavior of \fBbash\fP where the default operation differs
-from the POSIX standard to match the standard (\fIposix mode\fP).
-.TP
-.B \-\-restricted
-The shell becomes restricted (see
-.SM
-.B "RESTRICTED SHELL"
-below).
-.TP
-.B \-\-verbose
-Equivalent to \fB\-v\fP.
-.TP
-.B \-\-version
-Show version information for this instance of
-.B bash
-on the standard output and exit successfully.
-.PD
-.SH ARGUMENTS
-If arguments remain after option processing, and neither the
-.B \-c
-nor the
-.B \-s
-option has been supplied, the first argument is assumed to
-be the name of a file containing shell commands.
-If
-.B bash
-is invoked in this fashion,
-.B $0
-is set to the name of the file, and the positional parameters
-are set to the remaining arguments.
-.B Bash
-reads and executes commands from this file, then exits.
-\fBBash\fP's exit status is the exit status of the last command
-executed in the script.
-If no commands are executed, the exit status is 0.
-An attempt is first made to open the file in the current directory, and,
-if no file is found, then the shell searches the directories in
-.SM
-.B PATH
-for the script.
-.SH INVOCATION
-A \fIlogin shell\fP is one whose first character of argument zero is a
-.BR \- ,
-or one started with the
-.B \-\-login
-option.
-.PP
-An \fIinteractive\fP shell is one started without non-option arguments
-and without the
-.B \-c
-option
-whose standard input and error are
-both connected to terminals (as determined by
-.IR isatty (3)),
-or one started with the
-.B \-i
-option.
-.SM
-.B PS1
-is set and
-.B $\-
-includes
-.B i
-if
-.B bash
-is interactive,
-allowing a shell script or a startup file to test this state.
-.PP
-The following paragraphs describe how
-.B bash
-executes its startup files.
-If any of the files exist but cannot be read,
-.B bash
-reports an error.
-Tildes are expanded in file names as described below under
-.B "Tilde Expansion"
-in the
-.SM
-.B EXPANSION
-section.
-.PP
-When
-.B bash
-is invoked as an interactive login shell, or as a non-interactive shell
-with the \fB\-\-login\fP option, it first reads and
-executes commands from the file \fI/etc/profile\fP, if that
-file exists.
-After reading that file, it looks for \fI~/.bash_profile\fP,
-\fI~/.bash_login\fP, and \fI~/.profile\fP, in that order, and reads
-and executes commands from the first one that exists and is readable.
-The
-.B \-\-noprofile
-option may be used when the shell is started to inhibit this behavior.
-.PP
-When a login shell exits,
-.B bash
-reads and executes commands from the file \fI~/.bash_logout\fP, if it
-exists.
-.PP
-When an interactive shell that is not a login shell is started,
-.B bash
-reads and executes commands from \fI~/.bashrc\fP, if that file exists.
-This may be inhibited by using the
-.B \-\-norc
-option.
-The \fB\-\-rcfile\fP \fIfile\fP option will force
-.B bash
-to read and execute commands from \fIfile\fP instead of \fI~/.bashrc\fP.
-.PP
-When
-.B bash
-is started non-interactively, to run a shell script, for example, it
-looks for the variable
-.SM
-.B BASH_ENV
-in the environment, expands its value if it appears there, and uses the
-expanded value as the name of a file to read and execute.
-.B Bash
-behaves as if the following command were executed:
-.sp .5
-.RS
-.if t \f(CWif [ \-n "$BASH_ENV" ]; then . "$BASH_ENV"; fi\fP
-.if n if [ \-n "$BASH_ENV" ]; then . "$BASH_ENV"; fi
-.RE
-.sp .5
-but the value of the
-.SM
-.B PATH
-variable is not used to search for the file name.
-.PP
-If
-.B bash
-is invoked with the name
-.BR sh ,
-it tries to mimic the startup behavior of historical versions of
-.B sh
-as closely as possible,
-while conforming to the POSIX standard as well.
-When invoked as an interactive login shell, or a non-interactive
-shell with the \fB\-\-login\fP option, it first attempts to
-read and execute commands from
-.I /etc/profile
-and
-.IR ~/.profile ,
-in that order.
-The
-.B \-\-noprofile
-option may be used to inhibit this behavior.
-When invoked as an interactive shell with the name
-.BR sh ,
-.B bash
-looks for the variable
-.SM
-.BR ENV ,
-expands its value if it is defined, and uses the
-expanded value as the name of a file to read and execute.
-Since a shell invoked as
-.B sh
-does not attempt to read and execute commands from any other startup
-files, the
-.B \-\-rcfile
-option has no effect.
-A non-interactive shell invoked with the name
-.B sh
-does not attempt to read any other startup files.
-When invoked as
-.BR sh ,
-.B bash
-enters
-.I posix
-mode after the startup files are read.
-.PP
-When
-.B bash
-is started in
-.I posix
-mode, as with the
-.B \-\-posix
-command line option, it follows the POSIX standard for startup files.
-In this mode, interactive shells expand the
-.SM
-.B ENV
-variable and commands are read and executed from the file
-whose name is the expanded value.
-No other startup files are read.
-.PP
-.B Bash
-attempts to determine when it is being run with its standard input
-connected to a network connection, as when executed by the remote shell
-daemon, usually \fIrshd\fP, or the secure shell daemon \fIsshd\fP.
-If
-.B bash
-determines it is being run in this fashion, it reads and executes
-commands from \fI~/.bashrc\fP, if that file exists and is readable.
-It will not do this if invoked as \fBsh\fP.
-The
-.B \-\-norc
-option may be used to inhibit this behavior, and the
-.B \-\-rcfile
-option may be used to force another file to be read, but
-\fIrshd\fP does not generally invoke the shell with those options
-or allow them to be specified.
-.PP
-If the shell is started with the effective user (group) id not equal to the
-real user (group) id, and the \fB\-p\fP option is not supplied, no startup
-files are read, shell functions are not inherited from the environment, the
-.SM
-.BR SHELLOPTS ,
-.SM
-.BR BASHOPTS ,
-.SM
-.BR CDPATH ,
-and
-.SM
-.B GLOBIGNORE
-variables, if they appear in the environment, are ignored,
-and the effective user id is set to the real user id.
-If the \fB\-p\fP option is supplied at invocation, the startup behavior is
-the same, but the effective user id is not reset.
-.SH DEFINITIONS
-.PP
-The following definitions are used throughout the rest of this
-document.
-.PD 0
-.TP
-.B blank
-A space or tab.
-.TP
-.B word
-A sequence of characters considered as a single unit by the shell.
-Also known as a
-.BR token .
-.TP
-.B name
-A
-.I word
-consisting only of alphanumeric characters and underscores, and
-beginning with an alphabetic character or an underscore. Also
-referred to as an
-.BR identifier .
-.TP
-.B metacharacter
-A character that, when unquoted, separates words. One of the following:
-.br
-.RS
-.PP
-.if t \fB| & ; ( ) < > space tab\fP
-.if n \fB| & ; ( ) < > space tab\fP
-.RE
-.PP
-.TP
-.B control operator
-A \fItoken\fP that performs a control function. It is one of the following
-symbols:
-.RS
-.PP
-.if t \fB|| & && ; ;; ( ) | |& <newline>\fP
-.if n \fB|| & && ; ;; ( ) | |& <newline>\fP
-.RE
-.PD
-.SH "RESERVED WORDS"
-\fIReserved words\fP are words that have a special meaning to the shell.
-The following words are recognized as reserved when unquoted and either
-the first word of a simple command (see
-.SM
-.B SHELL GRAMMAR
-below) or the third word of a
-.B case
-or
-.B for
-command:
-.if t .RS
-.PP
-.B
-.if n ! case do done elif else esac fi for function if in select then until while { } time [[ ]]
-.if t ! case do done elif else esac fi for function if in select then until while { } time [[ ]]
-.if t .RE
-.SH "SHELL GRAMMAR"
-.SS Simple Commands
-.PP
-A \fIsimple command\fP is a sequence of optional variable assignments
-followed by \fBblank\fP-separated words and redirections, and
-terminated by a \fIcontrol operator\fP. The first word
-specifies the command to be executed, and is passed as argument zero.
-The remaining words are passed as arguments to the invoked command.
-.PP
-The return value of a \fIsimple command\fP is its exit status, or
-128+\fIn\^\fP if the command is terminated by signal
-.IR n .
-.SS Pipelines
-.PP
-A \fIpipeline\fP is a sequence of one or more commands separated by
-one of the control operators
-.B |
-or \fB|&\fP.
-The format for a pipeline is:
-.RS
-.PP
-[\fBtime\fP [\fB\-p\fP]] [ ! ] \fIcommand\fP [ [\fB|\fP\(bv\fB|&\fP] \fIcommand2\fP ... ]
-.RE
-.PP
-The standard output of
-.I command
-is connected via a pipe to the standard input of
-.IR command2 .
-This connection is performed before any redirections specified by the
-command (see
-.SM
-.B REDIRECTION
-below).
-If \fB|&\fP is used, the standard error of \fIcommand\fP is connected to
-\fIcommand2\fP's standard input through the pipe; it is shorthand for
-\fB2>&1 |\fP.
-This implicit redirection of the standard error is performed after any
-redirections specified by the command.
-.PP
-The return status of a pipeline is the exit status of the last
-command, unless the \fBpipefail\fP option is enabled.
-If \fBpipefail\fP is enabled, the pipeline's return status is the
-value of the last (rightmost) command to exit with a non-zero status,
-or zero if all commands exit successfully.
-If the reserved word
-.B !
-precedes a pipeline, the exit status of that pipeline is the logical
-negation of the exit status as described above.
-The shell waits for all commands in the pipeline to
-terminate before returning a value.
-.PP
-If the
-.B time
-reserved word precedes a pipeline, the elapsed as well as user and
-system time consumed by its execution are reported when the pipeline
-terminates.
-The \fB\-p\fP option changes the output format to that specified by POSIX.
-When the shell is in \fIposix mode\fP, it does not recognize
-\fBtime\fP as a reserved word if the next token begins with a `-'.
-The
-.SM
-.B TIMEFORMAT
-variable may be set to a format string that specifies how the timing
-information should be displayed; see the description of
-.SM
-.B TIMEFORMAT
-under
-.B "Shell Variables"
-below.
-.PP
-When the shell is in \fIposix mode\fP, \fBtime\fP
-may be followed by a newline. In this case, the shell displays the
-total user and system time consumed by the shell and its children.
-The
-.SM
-.B TIMEFORMAT
-variable may be used to specify the format of
-the time information.
-.PP
-Each command in a pipeline is executed as a separate process (i.e., in a
-subshell).
-.SS Lists
-.PP
-A \fIlist\fP is a sequence of one or more pipelines separated by one
-of the operators
-.BR ; ,
-.BR & ,
-.BR && ,
-or
-.BR || ,
-and optionally terminated by one of
-.BR ; ,
-.BR & ,
-or
-.BR <newline> .
-.PP
-Of these list operators,
-.B &&
-and
-.B ||
-have equal precedence, followed by
-.B ;
-and
-.BR & ,
-which have equal precedence.
-.PP
-A sequence of one or more newlines may appear in a \fIlist\fP instead
-of a semicolon to delimit commands.
-.PP
-If a command is terminated by the control operator
-.BR & ,
-the shell executes the command in the \fIbackground\fP
-in a subshell. The shell does not wait for the command to
-finish, and the return status is 0. Commands separated by a
-.B ;
-are executed sequentially; the shell waits for each
-command to terminate in turn. The return status is the
-exit status of the last command executed.
-.PP
-AND and OR lists are sequences of one of more pipelines separated by the
-\fB&&\fP and \fB||\fP control operators, respectively.
-AND and OR lists are executed with left associativity.
-An AND list has the form
-.RS
-.PP
-\fIcommand1\fP \fB&&\fP \fIcommand2\fP
-.RE
-.PP
-.I command2
-is executed if, and only if,
-.I command1
-returns an exit status of zero.
-.PP
-An OR list has the form
-.RS
-.PP
-\fIcommand1\fP \fB||\fP \fIcommand2\fP
-.PP
-.RE
-.PP
-.I command2
-is executed if and only if
-.I command1
-returns a non-zero exit status.
-The return status of
-AND and OR lists is the exit status of the last command
-executed in the list.
-.SS Compound Commands
-.PP
-A \fIcompound command\fP is one of the following.
-In most cases a \fIlist\fP in a command's description may be separated from
-the rest of the command by one or more newlines, and may be followed by a
-newline in place of a semicolon.
-.TP
-(\fIlist\fP)
-\fIlist\fP is executed in a subshell environment (see
-.SM
-\fBCOMMAND EXECUTION ENVIRONMENT\fP
-below).
-Variable assignments and builtin
-commands that affect the shell's environment do not remain in effect
-after the command completes. The return status is the exit status of
-\fIlist\fP.
-.TP
-{ \fIlist\fP; }
-\fIlist\fP is simply executed in the current shell environment.
-\fIlist\fP must be terminated with a newline or semicolon.
-This is known as a \fIgroup command\fP.
-The return status is the exit status of
-\fIlist\fP.
-Note that unlike the metacharacters \fB(\fP and \fB)\fP, \fB{\fP and
-\fB}\fP are \fIreserved words\fP and must occur where a reserved
-word is permitted to be recognized. Since they do not cause a word
-break, they must be separated from \fIlist\fP by whitespace or another
-shell metacharacter.
-.TP
-((\fIexpression\fP))
-The \fIexpression\fP is evaluated according to the rules described
-below under
-.SM
-.BR "ARITHMETIC EVALUATION" .
-If the value of the expression is non-zero, the return status is 0;
-otherwise the return status is 1. This is exactly equivalent to
-\fBlet "\fIexpression\fP"\fR.
-.TP
-\fB[[\fP \fIexpression\fP \fB]]\fP
-Return a status of 0 or 1 depending on the evaluation of
-the conditional expression \fIexpression\fP.
-Expressions are composed of the primaries described below under
-.SM
-.BR "CONDITIONAL EXPRESSIONS" .
-Word splitting and pathname expansion are not performed on the words
-between the \fB[[\fP and \fB]]\fP; tilde expansion, parameter and
-variable expansion, arithmetic expansion, command substitution, process
-substitution, and quote removal are performed.
-Conditional operators such as \fB\-f\fP must be unquoted to be recognized
-as primaries.
-.if t .sp 0.5
-.if n .sp 1
-When used with \fB[[\fP, the \fB<\fP and \fB>\fP operators sort
-lexicographically using the current locale.
-.if t .sp 0.5
-.if n .sp 1
-When the \fB==\fP and \fB!=\fP operators are used, the string to the
-right of the operator is considered a pattern and matched according
-to the rules described below under \fBPattern Matching\fP.
-If the shell option
-.B nocasematch
-is enabled, the match is performed without regard to the case
-of alphabetic characters.
-The return value is 0 if the string matches (\fB==\fP) or does not match
-(\fB!=\fP) the pattern, and 1 otherwise.
-Any part of the pattern may be quoted to force the quoted portion
-to be matched as a string.
-.if t .sp 0.5
-.if n .sp 1
-An additional binary operator, \fB=~\fP, is available, with the same
-precedence as \fB==\fP and \fB!=\fP.
-When it is used, the string to the right of the operator is considered
-an extended regular expression and matched accordingly (as in \fIregex\fP(3)).
-The return value is 0 if the string matches
-the pattern, and 1 otherwise.
-If the regular expression is syntactically incorrect, the conditional
-expression's return value is 2.
-If the shell option
-.B nocasematch
-is enabled, the match is performed without regard to the case
-of alphabetic characters.
-Any part of the pattern may be quoted to force the quoted portion
-to be matched as a string.
-Substrings matched by parenthesized subexpressions within the regular
-expression are saved in the array variable
-.SM
-.BR BASH_REMATCH .
-The element of
-.SM
-.B BASH_REMATCH
-with index 0 is the portion of the string
-matching the entire regular expression.
-The element of
-.SM
-.B BASH_REMATCH
-with index \fIn\fP is the portion of the
-string matching the \fIn\fPth parenthesized subexpression.
-.if t .sp 0.5
-.if n .sp 1
-Expressions may be combined using the following operators, listed
-in decreasing order of precedence:
-.if t .sp 0.5
-.if n .sp 1
-.RS
-.PD 0
-.TP
-.B ( \fIexpression\fP )
-Returns the value of \fIexpression\fP.
-This may be used to override the normal precedence of operators.
-.TP
-.B ! \fIexpression\fP
-True if
-.I expression
-is false.
-.TP
-\fIexpression1\fP \fB&&\fP \fIexpression2\fP
-True if both
-.I expression1
-and
-.I expression2
-are true.
-.TP
-\fIexpression1\fP \fB||\fP \fIexpression2\fP
-True if either
-.I expression1
-or
-.I expression2
-is true.
-.PD
-.LP
-The \fB&&\fP and \fB||\fP
-operators do not evaluate \fIexpression2\fP if the value of
-\fIexpression1\fP is sufficient to determine the return value of
-the entire conditional expression.
-.RE
-.TP
-\fBfor\fP \fIname\fP [ [ \fBin\fP [ \fIword ...\fP ] ] ; ] \fBdo\fP \fIlist\fP ; \fBdone\fP
-The list of words following \fBin\fP is expanded, generating a list
-of items.
-The variable \fIname\fP is set to each element of this list
-in turn, and \fIlist\fP is executed each time.
-If the \fBin\fP \fIword\fP is omitted, the \fBfor\fP command executes
-\fIlist\fP once for each positional parameter that is set (see
-.SM
-.B PARAMETERS
-below).
-The return status is the exit status of the last command that executes.
-If the expansion of the items following \fBin\fP results in an empty
-list, no commands are executed, and the return status is 0.
-.TP
-\fBfor\fP (( \fIexpr1\fP ; \fIexpr2\fP ; \fIexpr3\fP )) ; \fBdo\fP \fIlist\fP ; \fBdone\fP
-First, the arithmetic expression \fIexpr1\fP is evaluated according
-to the rules described below under
-.SM
-.BR "ARITHMETIC EVALUATION" .
-The arithmetic expression \fIexpr2\fP is then evaluated repeatedly
-until it evaluates to zero.
-Each time \fIexpr2\fP evaluates to a non-zero value, \fIlist\fP is
-executed and the arithmetic expression \fIexpr3\fP is evaluated.
-If any expression is omitted, it behaves as if it evaluates to 1.
-The return value is the exit status of the last command in \fIlist\fP
-that is executed, or false if any of the expressions is invalid.
-.TP
-\fBselect\fP \fIname\fP [ \fBin\fP \fIword\fP ] ; \fBdo\fP \fIlist\fP ; \fBdone\fP
-The list of words following \fBin\fP is expanded, generating a list
-of items. The set of expanded words is printed on the standard
-error, each preceded by a number. If the \fBin\fP
-\fIword\fP is omitted, the positional parameters are printed (see
-.SM
-.B PARAMETERS
-below). The
-.SM
-.B PS3
-prompt is then displayed and a line read from the standard input.
-If the line consists of a number corresponding to one of
-the displayed words, then the value of
-.I name
-is set to that word. If the line is empty, the words and prompt
-are displayed again. If EOF is read, the command completes. Any
-other value read causes
-.I name
-to be set to null. The line read is saved in the variable
-.SM
-.BR REPLY .
-The
-.I list
-is executed after each selection until a
-.B break
-command is executed.
-The exit status of
-.B select
-is the exit status of the last command executed in
-.IR list ,
-or zero if no commands were executed.
-.TP
-\fBcase\fP \fIword\fP \fBin\fP [ [(] \fIpattern\fP [ \fB|\fP \fIpattern\fP ] \
-... ) \fIlist\fP ;; ] ... \fBesac\fP
-A \fBcase\fP command first expands \fIword\fP, and tries to match
-it against each \fIpattern\fP in turn, using the same matching rules
-as for pathname expansion (see
-.B Pathname Expansion
-below).
-The \fIword\fP is expanded using tilde
-expansion, parameter and variable expansion, arithmetic substitution,
-command substitution, process substitution and quote removal.
-Each \fIpattern\fP examined is expanded using tilde
-expansion, parameter and variable expansion, arithmetic substitution,
-command substitution, and process substitution.
-If the shell option
-.B nocasematch
-is enabled, the match is performed without regard to the case
-of alphabetic characters.
-When a match is found, the corresponding \fIlist\fP is executed.
-If the \fB;;\fP operator is used, no subsequent matches are attempted after
-the first pattern match.
-Using \fB;&\fP in place of \fB;;\fP causes execution to continue with
-the \fIlist\fP associated with the next set of patterns.
-Using \fB;;&\fP in place of \fB;;\fP causes the shell to test the next
-pattern list in the statement, if any, and execute any associated \fIlist\fP
-on a successful match.
-The exit status is zero if no
-pattern matches. Otherwise, it is the exit status of the
-last command executed in \fIlist\fP.
-.TP
-\fBif\fP \fIlist\fP; \fBthen\fP \fIlist;\fP \
-[ \fBelif\fP \fIlist\fP; \fBthen\fP \fIlist\fP; ] ... \
-[ \fBelse\fP \fIlist\fP; ] \fBfi\fP
-The
-.B if
-.I list
-is executed. If its exit status is zero, the
-\fBthen\fP \fIlist\fP is executed. Otherwise, each \fBelif\fP
-\fIlist\fP is executed in turn, and if its exit status is zero,
-the corresponding \fBthen\fP \fIlist\fP is executed and the
-command completes. Otherwise, the \fBelse\fP \fIlist\fP is
-executed, if present. The exit status is the exit status of the
-last command executed, or zero if no condition tested true.
-.TP
-\fBwhile\fP \fIlist-1\fP; \fBdo\fP \fIlist-2\fP; \fBdone\fP
-.PD 0
-.TP
-\fBuntil\fP \fIlist-1\fP; \fBdo\fP \fIlist-2\fP; \fBdone\fP
-.PD
-The \fBwhile\fP command continuously executes the list
-\fIlist-2\fP as long as the last command in the list \fIlist-1\fP returns
-an exit status of zero. The \fBuntil\fP command is identical
-to the \fBwhile\fP command, except that the test is negated;
-.I list-2
-is executed as long as the last command in
-.I list-1
-returns a non-zero exit status.
-The exit status of the \fBwhile\fP and \fBuntil\fP commands
-is the exit status
-of the last command executed in \fIlist-2\fP, or zero if
-none was executed.
-.SS Coprocesses
-.PP
-A \fIcoprocess\fP is a shell command preceded by the \fBcoproc\fP reserved
-word.
-A coprocess is executed asynchronously in a subshell, as if the command
-had been terminated with the \fB&\fP control operator, with a two-way pipe
-established between the executing shell and the coprocess.
-.PP
-The format for a coprocess is:
-.RS
-.PP
-\fBcoproc\fP [\fINAME\fP] \fIcommand\fP [\fIredirections\fP]
-.RE
-.PP
-This creates a coprocess named \fINAME\fP.
-If \fINAME\fP is not supplied, the default name is \fBCOPROC\fP.
-\fINAME\fP must not be supplied if \fIcommand\fP is a \fIsimple
-command\fP (see above); otherwise, it is interpreted as the first word
-of the simple command.
-When the coproc is executed, the shell creates an array variable (see
-.B Arrays
-below) named \fINAME\fP in the context of the executing shell.
-The standard output of
-.I command
-is connected via a pipe to a file descriptor in the executing shell,
-and that file descriptor is assigned to \fINAME\fP[0].
-The standard input of
-.I command
-is connected via a pipe to a file descriptor in the executing shell,
-and that file descriptor is assigned to \fINAME\fP[1].
-This pipe is established before any redirections specified by the
-command (see
-.SM
-.B REDIRECTION
-below).
-The file descriptors can be utilized as arguments to shell commands
-and redirections using standard word expansions.
-The process ID of the shell spawned to execute the coprocess is
-available as the value of the variable \fINAME\fP_PID.
-The \fBwait\fP
-builtin command may be used to wait for the coprocess to terminate.
-.PP
-The return status of a coprocess is the exit status of \fIcommand\fP.
-.SS Shell Function Definitions
-.PP
-A shell function is an object that is called like a simple command and
-executes a compound command with a new set of positional parameters.
-Shell functions are declared as follows:
-.TP
-\fIname\fP () \fIcompound\-command\fP [\fIredirection\fP]
-.PD 0
-.TP
-\fBfunction\fP \fIname\fP [()] \fIcompound\-command\fP [\fIredirection\fP]
-.PD
-This defines a function named \fIname\fP.
-The reserved word \fBfunction\fP is optional.
-If the \fBfunction\fP reserved word is supplied, the parentheses are optional.
-The \fIbody\fP of the function is the compound command
-.I compound\-command
-(see \fBCompound Commands\fP above).
-That command is usually a \fIlist\fP of commands between { and }, but
-may be any command listed under \fBCompound Commands\fP above.
-\fIcompound\-command\fP is executed whenever \fIname\fP is specified as the
-name of a simple command.
-Any redirections (see
-.SM
-.B REDIRECTION
-below) specified when a function is defined are performed
-when the function is executed.
-The exit status of a function definition is zero unless a syntax error
-occurs or a readonly function with the same name already exists.
-When executed, the exit status of a function is the exit status of the
-last command executed in the body. (See
-.SM
-.B FUNCTIONS
-below.)
-.SH COMMENTS
-In a non-interactive shell, or an interactive shell in which the
-.B interactive_comments
-option to the
-.B shopt
-builtin is enabled (see
-.SM
-.B "SHELL BUILTIN COMMANDS"
-below), a word beginning with
-.B #
-causes that word and all remaining characters on that line to
-be ignored. An interactive shell without the
-.B interactive_comments
-option enabled does not allow comments. The
-.B interactive_comments
-option is on by default in interactive shells.
-.SH QUOTING
-\fIQuoting\fP is used to remove the special meaning of certain
-characters or words to the shell. Quoting can be used to
-disable special treatment for special characters, to prevent
-reserved words from being recognized as such, and to prevent
-parameter expansion.
-.PP
-Each of the \fImetacharacters\fP listed above under
-.SM
-.B DEFINITIONS
-has special meaning to the shell and must be quoted if it is to
-represent itself.
-.PP
-When the command history expansion facilities are being used
-(see
-.SM
-.B HISTORY EXPANSION
-below), the
-\fIhistory expansion\fP character, usually \fB!\fP, must be quoted
-to prevent history expansion.
-.PP
-There are three quoting mechanisms: the
-.IR "escape character" ,
-single quotes, and double quotes.
-.PP
-A non-quoted backslash (\fB\e\fP) is the
-.IR "escape character" .
-It preserves the literal value of the next character that follows,
-with the exception of <newline>. If a \fB\e\fP<newline> pair
-appears, and the backslash is not itself quoted, the \fB\e\fP<newline>
-is treated as a line continuation (that is, it is removed from the
-input stream and effectively ignored).
-.PP
-Enclosing characters in single quotes preserves the literal value
-of each character within the quotes. A single quote may not occur
-between single quotes, even when preceded by a backslash.
-.PP
-Enclosing characters in double quotes preserves the literal value
-of all characters within the quotes, with the exception of
-.BR $ ,
-.BR \` ,
-.BR \e ,
-and, when history expansion is enabled,
-.BR ! .
-The characters
-.B $
-and
-.B \`
-retain their special meaning within double quotes. The backslash
-retains its special meaning only when followed by one of the following
-characters:
-.BR $ ,
-.BR \` ,
-\^\fB"\fP\^,
-.BR \e ,
-or
-.BR <newline> .
-A double quote may be quoted within double quotes by preceding it with
-a backslash.
-If enabled, history expansion will be performed unless an
-.B !
-appearing in double quotes is escaped using a backslash.
-The backslash preceding the
-.B !
-is not removed.
-.PP
-The special parameters
-.B *
-and
-.B @
-have special meaning when in double
-quotes (see
-.SM
-.B PARAMETERS
-below).
-.PP
-Words of the form \fB$\fP\(aq\fIstring\fP\(aq are treated specially. The
-word expands to \fIstring\fP, with backslash-escaped characters replaced
-as specified by the ANSI C standard. Backslash escape sequences, if
-present, are decoded as follows:
-.RS
-.PD 0
-.TP
-.B \ea
-alert (bell)
-.TP
-.B \eb
-backspace
-.TP
-.B \ee
-.TP
-.B \eE
-an escape character
-.TP
-.B \ef
-form feed
-.TP
-.B \en
-new line
-.TP
-.B \er
-carriage return
-.TP
-.B \et
-horizontal tab
-.TP
-.B \ev
-vertical tab
-.TP
-.B \e\e
-backslash
-.TP
-.B \e\(aq
-single quote
-.TP
-.B \e\(dq
-double quote
-.TP
-.B \e\fInnn\fP
-the eight-bit character whose value is the octal value \fInnn\fP
-(one to three digits)
-.TP
-.B \ex\fIHH\fP
-the eight-bit character whose value is the hexadecimal value \fIHH\fP
-(one or two hex digits)
-.TP
-.B \eu\fIHHHH\fP
-the Unicode (ISO/IEC 10646) character whose value is the hexadecimal value
-\fIHHHH\fP (one to four hex digits)
-.TP
-.B \eU\fIHHHHHHHH\fP
-the Unicode (ISO/IEC 10646) character whose value is the hexadecimal value
-\fIHHHHHHHH\fP (one to eight hex digits)
-.TP
-.B \ec\fIx\fP
-a control-\fIx\fP character
-.PD
-.RE
-.LP
-The expanded result is single-quoted, as if the dollar sign had
-not been present.
-.PP
-A double-quoted string preceded by a dollar sign (\fB$\fP\(dq\fIstring\fP\(dq)
-will cause the string to be translated according to the current locale.
-If the current locale is \fBC\fP or \fBPOSIX\fP, the dollar sign
-is ignored.
-If the string is translated and replaced, the replacement is
-double-quoted.
-.SH PARAMETERS
-A
-.I parameter
-is an entity that stores values.
-It can be a
-.IR name ,
-a number, or one of the special characters listed below under
-.BR "Special Parameters" .
-A
-.I variable
-is a parameter denoted by a
-.IR name .
-A variable has a \fIvalue\fP and zero or more \fIattributes\fP.
-Attributes are assigned using the
-.B declare
-builtin command (see
-.B declare
-below in
-.SM
-.BR "SHELL BUILTIN COMMANDS" ).
-.PP
-A parameter is set if it has been assigned a value. The null string is
-a valid value. Once a variable is set, it may be unset only by using
-the
-.B unset
-builtin command (see
-.SM
-.B SHELL BUILTIN COMMANDS
-below).
-.PP
-A
-.I variable
-may be assigned to by a statement of the form
-.RS
-.PP
-\fIname\fP=[\fIvalue\fP]
-.RE
-.PP
-If
-.I value
-is not given, the variable is assigned the null string. All
-.I values
-undergo tilde expansion, parameter and variable expansion,
-command substitution, arithmetic expansion, and quote
-removal (see
-.SM
-.B EXPANSION
-below). If the variable has its
-.B integer
-attribute set, then
-.I value
-is evaluated as an arithmetic expression even if the $((...)) expansion is
-not used (see
-.B "Arithmetic Expansion"
-below).
-Word splitting is not performed, with the exception
-of \fB"$@"\fP as explained below under
-.BR "Special Parameters" .
-Pathname expansion is not performed.
-Assignment statements may also appear as arguments to the
-.BR alias ,
-.BR declare ,
-.BR typeset ,
-.BR export ,
-.BR readonly ,
-and
-.B local
-builtin commands.
-.PP
-In the context where an assignment statement is assigning a value
-to a shell variable or array index, the += operator can be used to
-append to or add to the variable's previous value.
-When += is applied to a variable for which the \fIinteger\fP attribute has been
-set, \fIvalue\fP is evaluated as an arithmetic expression and added to the
-variable's current value, which is also evaluated.
-When += is applied to an array variable using compound assignment (see
-.B Arrays
-below), the
-variable's value is not unset (as it is when using =), and new values are
-appended to the array beginning at one greater than the array's maximum index
-(for indexed arrays) or added as additional key\-value pairs in an
-associative array.
-When applied to a string-valued variable, \fIvalue\fP is expanded and
-appended to the variable's value.
-.SS Positional Parameters
-.PP
-A
-.I positional parameter
-is a parameter denoted by one or more
-digits, other than the single digit 0. Positional parameters are
-assigned from the shell's arguments when it is invoked,
-and may be reassigned using the
-.B set
-builtin command. Positional parameters may not be assigned to
-with assignment statements. The positional parameters are
-temporarily replaced when a shell function is executed (see
-.SM
-.B FUNCTIONS
-below).
-.PP
-When a positional parameter consisting of more than a single
-digit is expanded, it must be enclosed in braces (see
-.SM
-.B EXPANSION
-below).
-.SS Special Parameters
-.PP
-The shell treats several parameters specially. These parameters may
-only be referenced; assignment to them is not allowed.
-.PD 0
-.TP
-.B *
-Expands to the positional parameters, starting from one. When the
-expansion occurs within double quotes, it expands to a single word
-with the value of each parameter separated by the first character
-of the
-.SM
-.B IFS
-special variable. That is, "\fB$*\fP" is equivalent
-to "\fB$1\fP\fIc\fP\fB$2\fP\fIc\fP\fB...\fP", where
-.I c
-is the first character of the value of the
-.SM
-.B IFS
-variable. If
-.SM
-.B IFS
-is unset, the parameters are separated by spaces.
-If
-.SM
-.B IFS
-is null, the parameters are joined without intervening separators.
-.TP
-.B @
-Expands to the positional parameters, starting from one. When the
-expansion occurs within double quotes, each parameter expands to a
-separate word. That is, "\fB$@\fP" is equivalent to
-"\fB$1\fP" "\fB$2\fP" ...
-If the double-quoted expansion occurs within a word, the expansion of
-the first parameter is joined with the beginning part of the original
-word, and the expansion of the last parameter is joined with the last
-part of the original word.
-When there are no positional parameters, "\fB$@\fP" and
-.B $@
-expand to nothing (i.e., they are removed).
-.TP
-.B #
-Expands to the number of positional parameters in decimal.
-.TP
-.B ?
-Expands to the exit status of the most recently executed foreground
-pipeline.
-.TP
-.B \-
-Expands to the current option flags as specified upon invocation,
-by the
-.B set
-builtin command, or those set by the shell itself
-(such as the
-.B \-i
-option).
-.TP
-.B $
-Expands to the process ID of the shell. In a () subshell, it
-expands to the process ID of the current shell, not the
-subshell.
-.TP
-.B !
-Expands to the process ID of the most recently executed background
-(asynchronous) command.
-.TP
-.B 0
-Expands to the name of the shell or shell script. This is set at
-shell initialization. If
-.B bash
-is invoked with a file of commands,
-.B $0
-is set to the name of that file. If
-.B bash
-is started with the
-.B \-c
-option, then
-.B $0
-is set to the first argument after the string to be
-executed, if one is present. Otherwise, it is set
-to the file name used to invoke
-.BR bash ,
-as given by argument zero.
-.TP
-.B _
-At shell startup, set to the absolute pathname used to invoke the
-shell or shell script being executed as passed in the environment
-or argument list.
-Subsequently, expands to the last argument to the previous command,
-after expansion.
-Also set to the full pathname used to invoke each command executed
-and placed in the environment exported to that command.
-When checking mail, this parameter holds the name of the mail file
-currently being checked.
-.PD
-.SS Shell Variables
-.PP
-The following variables are set by the shell:
-.PP
-.PD 0
-.TP
-.B BASH
-Expands to the full file name used to invoke this instance of
-.BR bash .
-.TP
-.B BASHOPTS
-A colon-separated list of enabled shell options. Each word in
-the list is a valid argument for the
-.B \-s
-option to the
-.B shopt
-builtin command (see
-.SM
-.B "SHELL BUILTIN COMMANDS"
-below). The options appearing in
-.SM
-.B BASHOPTS
-are those reported as
-.I on
-by \fBshopt\fP.
-If this variable is in the environment when
-.B bash
-starts up, each shell option in the list will be enabled before
-reading any startup files.
-This variable is read-only.
-.TP
-.B BASHPID
-Expands to the process ID of the current \fBbash\fP process.
-This differs from \fB$$\fP under certain circumstances, such as subshells
-that do not require \fBbash\fP to be re-initialized.
-.TP
-.B BASH_ALIASES
-An associative array variable whose members correspond to the internal
-list of aliases as maintained by the \fBalias\fP builtin.
-Elements added to this array appear in the alias list; unsetting array
-elements cause aliases to be removed from the alias list.
-.TP
-.B BASH_ARGC
-An array variable whose values are the number of parameters in each
-frame of the current \fBbash\fP execution call stack.
-The number of
-parameters to the current subroutine (shell function or script executed
-with \fB.\fP or \fBsource\fP) is at the top of the stack.
-When a subroutine is executed, the number of parameters passed is pushed onto
-.SM
-.BR BASH_ARGC .
-The shell sets
-.SM
-.B BASH_ARGC
-only when in extended debugging mode (see the description of the
-.B extdebug
-option to the
-.B shopt
-builtin below)
-.TP
-.B BASH_ARGV
-An array variable containing all of the parameters in the current \fBbash\fP
-execution call stack. The final parameter of the last subroutine call
-is at the top of the stack; the first parameter of the initial call is
-at the bottom. When a subroutine is executed, the parameters supplied
-are pushed onto
-.SM
-.BR BASH_ARGV .
-The shell sets
-.SM
-.B BASH_ARGV
-only when in extended debugging mode
-(see the description of the
-.B extdebug
-option to the
-.B shopt
-builtin below)
-.TP
-.B BASH_CMDS
-An associative array variable whose members correspond to the internal
-hash table of commands as maintained by the \fBhash\fP builtin.
-Elements added to this array appear in the hash table; unsetting array
-elements cause commands to be removed from the hash table.
-.TP
-.B BASH_COMMAND
-The command currently being executed or about to be executed, unless the
-shell is executing a command as the result of a trap,
-in which case it is the command executing at the time of the trap.
-.TP
-.B BASH_EXECUTION_STRING
-The command argument to the \fB\-c\fP invocation option.
-.TP
-.B BASH_LINENO
-An array variable whose members are the line numbers in source files
-where each corresponding member of
-.SM
-.B FUNCNAME
-was invoked.
-\fB${BASH_LINENO[\fP\fI$i\fP\fB]}\fP is the line number in the source
-file (\fB${BASH_SOURCE[\fP\fI$i+1\fP\fB]}\fP) where
-\fB${FUNCNAME[\fP\fI$i\fP\fB]}\fP was called
-(or \fB${BASH_LINENO[\fP\fI$i-1\fP\fB]}\fP if referenced within another
-shell function).
-Use
-.SM
-.B LINENO
-to obtain the current line number.
-.TP
-.B BASH_REMATCH
-An array variable whose members are assigned by the \fB=~\fP binary
-operator to the \fB[[\fP conditional command.
-The element with index 0 is the portion of the string
-matching the entire regular expression.
-The element with index \fIn\fP is the portion of the
-string matching the \fIn\fPth parenthesized subexpression.
-This variable is read-only.
-.TP
-.B BASH_SOURCE
-An array variable whose members are the source filenames
-where the corresponding shell function names in the
-.SM
-.B FUNCNAME
-array variable are defined.
-The shell function
-\fB${FUNCNAME[\fP\fI$i\fP\fB]}\fP is defined in the file
-\fB${BASH_SOURCE[\fP\fI$i\fP\fB]}\fP and called from
-\fB${BASH_SOURCE[\fP\fI$i+1\fP\fB]}\fP.
-.TP
-.B BASH_SUBSHELL
-Incremented by one within each subshell or subshell environment when
-the shell begins executing in that environment.
-The initial value is 0.
-.TP
-.B BASH_VERSINFO
-A readonly array variable whose members hold version information for
-this instance of
-.BR bash .
-The values assigned to the array members are as follows:
-.sp .5
-.RS
-.TP 24
-.B BASH_VERSINFO[\fR0\fP]
-The major version number (the \fIrelease\fP).
-.TP
-.B BASH_VERSINFO[\fR1\fP]
-The minor version number (the \fIversion\fP).
-.TP
-.B BASH_VERSINFO[\fR2\fP]
-The patch level.
-.TP
-.B BASH_VERSINFO[\fR3\fP]
-The build version.
-.TP
-.B BASH_VERSINFO[\fR4\fP]
-The release status (e.g., \fIbeta1\fP).
-.TP
-.B BASH_VERSINFO[\fR5\fP]
-The value of
-.SM
-.BR MACHTYPE .
-.RE
-.TP
-.B BASH_VERSION
-Expands to a string describing the version of this instance of
-.BR bash .
-.TP
-.B COMP_CWORD
-An index into \fB${COMP_WORDS}\fP of the word containing the current
-cursor position.
-This variable is available only in shell functions invoked by the
-programmable completion facilities (see \fBProgrammable Completion\fP
-below).
-.TP
-.B COMP_KEY
-The key (or final key of a key sequence) used to invoke the current
-completion function.
-.TP
-.B COMP_LINE
-The current command line.
-This variable is available only in shell functions and external
-commands invoked by the
-programmable completion facilities (see \fBProgrammable Completion\fP
-below).
-.TP
-.B COMP_POINT
-The index of the current cursor position relative to the beginning of
-the current command.
-If the current cursor position is at the end of the current command,
-the value of this variable is equal to \fB${#COMP_LINE}\fP.
-This variable is available only in shell functions and external
-commands invoked by the
-programmable completion facilities (see \fBProgrammable Completion\fP
-below).
-.TP
-.B COMP_TYPE
-Set to an integer value corresponding to the type of completion attempted
-that caused a completion function to be called:
-\fITAB\fP, for normal completion,
-\fI?\fP, for listing completions after successive tabs,
-\fI!\fP, for listing alternatives on partial word completion,
-\fI@\fP, to list completions if the word is not unmodified,
-or
-\fI%\fP, for menu completion.
-This variable is available only in shell functions and external
-commands invoked by the
-programmable completion facilities (see \fBProgrammable Completion\fP
-below).
-.TP
-.B COMP_WORDBREAKS
-The set of characters that the \fBreadline\fP library treats as word
-separators when performing word completion.
-If
-.SM
-.B COMP_WORDBREAKS
-is unset, it loses its special properties, even if it is
-subsequently reset.
-.TP
-.B COMP_WORDS
-An array variable (see \fBArrays\fP below) consisting of the individual
-words in the current command line.
-The line is split into words as \fBreadline\fP would split it, using
-.SM
-.B COMP_WORDBREAKS
-as described above.
-This variable is available only in shell functions invoked by the
-programmable completion facilities (see \fBProgrammable Completion\fP
-below).
-.TP
-.B COPROC
-An array variable (see \fBArrays\fP below) created to hold the file descriptors
-for output from and input to an unnamed coprocess (see \fBCoprocesses\fP
-above).
-.TP
-.B DIRSTACK
-An array variable (see
-.B Arrays
-below) containing the current contents of the directory stack.
-Directories appear in the stack in the order they are displayed by the
-.B dirs
-builtin.
-Assigning to members of this array variable may be used to modify
-directories already in the stack, but the
-.B pushd
-and
-.B popd
-builtins must be used to add and remove directories.
-Assignment to this variable will not change the current directory.
-If
-.SM
-.B DIRSTACK
-is unset, it loses its special properties, even if it is
-subsequently reset.
-.TP
-.B EUID
-Expands to the effective user ID of the current user, initialized at
-shell startup. This variable is readonly.
-.TP
-.B FUNCNAME
-An array variable containing the names of all shell functions
-currently in the execution call stack.
-The element with index 0 is the name of any currently-executing
-shell function.
-The bottom-most element (the one with the highest index) is
-.if t \f(CW"main"\fP.
-.if n "main".
-This variable exists only when a shell function is executing.
-Assignments to
-.SM
-.B FUNCNAME
-have no effect and return an error status.
-If
-.SM
-.B FUNCNAME
-is unset, it loses its special properties, even if it is
-subsequently reset.
-.if t .sp 0.5
-.if n .sp 1
-This variable can be used with \fBBASH_LINENO\fP and \fBBASH_SOURCE\fP.
-Each element of \fBFUNCNAME\fP has corresponding elements in
-\fBBASH_LINENO\fP and \fBBASH_SOURCE\fP to describe the call stack.
-For instance, \fB${FUNCNAME[\fP\fI$i\fP\fB]}\fP was called from the file
-\fB${BASH_SOURCE[\fP\fI$i+1\fP\fB]}\fP at line number
-\fB${BASH_LINENO[\fP\fI$i\fP\fB]}\fP.
-The \fBcaller\fP builtin displays the current call stack using this
-information.
-.TP
-.B GROUPS
-An array variable containing the list of groups of which the current
-user is a member.
-Assignments to
-.SM
-.B GROUPS
-have no effect and return an error status.
-If
-.SM
-.B GROUPS
-is unset, it loses its special properties, even if it is
-subsequently reset.
-.TP
-.B HISTCMD
-The history number, or index in the history list, of the current
-command.
-If
-.SM
-.B HISTCMD
-is unset, it loses its special properties, even if it is
-subsequently reset.
-.TP
-.B HOSTNAME
-Automatically set to the name of the current host.
-.TP
-.B HOSTTYPE
-Automatically set to a string that uniquely
-describes the type of machine on which
-.B bash
-is executing.
-The default is system-dependent.
-.TP
-.B LINENO
-Each time this parameter is referenced, the shell substitutes
-a decimal number representing the current sequential line number
-(starting with 1) within a script or function. When not in a
-script or function, the value substituted is not guaranteed to
-be meaningful.
-If
-.SM
-.B LINENO
-is unset, it loses its special properties, even if it is
-subsequently reset.
-.TP
-.B MACHTYPE
-Automatically set to a string that fully describes the system
-type on which
-.B bash
-is executing, in the standard GNU \fIcpu-company-system\fP format.
-The default is system-dependent.
-.TP
-.B MAPFILE
-An array variable (see \fBArrays\fP below) created to hold the text
-read by the \fBmapfile\fP builtin when no variable name is supplied.
-.TP
-.B OLDPWD
-The previous working directory as set by the
-.B cd
-command.
-.TP
-.B OPTARG
-The value of the last option argument processed by the
-.B getopts
-builtin command (see
-.SM
-.B SHELL BUILTIN COMMANDS
-below).
-.TP
-.B OPTIND
-The index of the next argument to be processed by the
-.B getopts
-builtin command (see
-.SM
-.B SHELL BUILTIN COMMANDS
-below).
-.TP
-.B OSTYPE
-Automatically set to a string that
-describes the operating system on which
-.B bash
-is executing.
-The default is system-dependent.
-.TP
-.B PIPESTATUS
-An array variable (see
-.B Arrays
-below) containing a list of exit status values from the processes
-in the most-recently-executed foreground pipeline (which may
-contain only a single command).
-.TP
-.B PPID
-The process ID of the shell's parent. This variable is readonly.
-.TP
-.B PWD
-The current working directory as set by the
-.B cd
-command.
-.TP
-.B RANDOM
-Each time this parameter is referenced, a random integer between
-0 and 32767 is
-generated. The sequence of random numbers may be initialized by assigning
-a value to
-.SM
-.BR RANDOM .
-If
-.SM
-.B RANDOM
-is unset, it loses its special properties, even if it is
-subsequently reset.
-.TP
-.B READLINE_LINE
-The contents of the
-.B readline
-line buffer, for use with
-.if t \f(CWbind -x\fP
-.if n "bind -x"
-(see
-.SM
-.B "SHELL BUILTIN COMMANDS"
-below).
-.TP
-.B READLINE_POINT
-The position of the insertion point in the
-.B readline
-line buffer, for use with
-.if t \f(CWbind -x\fP
-.if n "bind -x"
-(see
-.SM
-.B "SHELL BUILTIN COMMANDS"
-below).
-.TP
-.B REPLY
-Set to the line of input read by the
-.B read
-builtin command when no arguments are supplied.
-.TP
-.B SECONDS
-Each time this parameter is
-referenced, the number of seconds since shell invocation is returned. If a
-value is assigned to
-.SM
-.BR SECONDS ,
-the value returned upon subsequent
-references is
-the number of seconds since the assignment plus the value assigned.
-If
-.SM
-.B SECONDS
-is unset, it loses its special properties, even if it is
-subsequently reset.
-.TP
-.B SHELLOPTS
-A colon-separated list of enabled shell options. Each word in
-the list is a valid argument for the
-.B \-o
-option to the
-.B set
-builtin command (see
-.SM
-.B "SHELL BUILTIN COMMANDS"
-below). The options appearing in
-.SM
-.B SHELLOPTS
-are those reported as
-.I on
-by \fBset \-o\fP.
-If this variable is in the environment when
-.B bash
-starts up, each shell option in the list will be enabled before
-reading any startup files.
-This variable is read-only.
-.TP
-.B SHLVL
-Incremented by one each time an instance of
-.B bash
-is started.
-.TP
-.B UID
-Expands to the user ID of the current user, initialized at shell startup.
-This variable is readonly.
-.PD
-.PP
-The following variables are used by the shell. In some cases,
-.B bash
-assigns a default value to a variable; these cases are noted
-below.
-.PP
-.PD 0
-.TP
-.B BASH_ENV
-If this parameter is set when \fBbash\fP is executing a shell script,
-its value is interpreted as a filename containing commands to
-initialize the shell, as in
-.IR ~/.bashrc .
-The value of
-.SM
-.B BASH_ENV
-is subjected to parameter expansion, command substitution, and arithmetic
-expansion before being interpreted as a file name.
-.SM
-.B PATH
-is not used to search for the resultant file name.
-.TP
-.B BASH_XTRACEFD
-If set to an integer corresponding to a valid file descriptor, \fBbash\fP
-will write the trace output generated when
-.if t \f(CWset -x\fP
-.if n \fIset -x\fP
-is enabled to that file descriptor.
-The file descriptor is closed when
-.SM
-.B BASH_XTRACEFD
-is unset or assigned a new value.
-Unsetting
-.SM
-.B BASH_XTRACEFD
-or assigning it the empty string causes the
-trace output to be sent to the standard error.
-Note that setting
-.SM
-.B BASH_XTRACEFD
-to 2 (the standard error file
-descriptor) and then unsetting it will result in the standard error
-being closed.
-.TP
-.B CDPATH
-The search path for the
-.B cd
-command.
-This is a colon-separated list of directories in which the shell looks
-for destination directories specified by the
-.B cd
-command.
-A sample value is
-.if t \f(CW".:~:/usr"\fP.
-.if n ".:~:/usr".
-.TP
-.B COLUMNS
-Used by the \fBselect\fP compound command to determine the terminal width
-when printing selection lists. Automatically set in an interactive shell
-upon receipt of a
-.SM
-.BR SIGWINCH .
-.TP
-.B COMPREPLY
-An array variable from which \fBbash\fP reads the possible completions
-generated by a shell function invoked by the programmable completion
-facility (see \fBProgrammable Completion\fP below).
-.TP
-.B EMACS
-If \fBbash\fP finds this variable in the environment when the shell starts
-with value
-.if t \f(CWt\fP,
-.if n "t",
-it assumes that the shell is running in an Emacs shell buffer and disables
-line editing.
-.TP
-.B ENV
-Similar to
-.SM
-.BR BASH_ENV ;
-used when the shell is invoked in POSIX mode.
-.TP
-.B FCEDIT
-The default editor for the
-.B fc
-builtin command.
-.TP
-.B FIGNORE
-A colon-separated list of suffixes to ignore when performing
-filename completion (see
-.SM
-.B READLINE
-below).
-A filename whose suffix matches one of the entries in
-.SM
-.B FIGNORE
-is excluded from the list of matched filenames.
-A sample value is
-.if t \f(CW".o:~"\fP.
-.if n ".o:~".
-.TP
-.B FUNCNEST
-If set to a numeric value greater than 0, defines a maximum function
-nesting level. Function invocations that exceed this nesting level
-will cause the current command to abort.
-.TP
-.B GLOBIGNORE
-A colon-separated list of patterns defining the set of filenames to
-be ignored by pathname expansion.
-If a filename matched by a pathname expansion pattern also matches one
-of the patterns in
-.SM
-.BR GLOBIGNORE ,
-it is removed from the list of matches.
-.TP
-.B HISTCONTROL
-A colon-separated list of values controlling how commands are saved on
-the history list.
-If the list of values includes
-.IR ignorespace ,
-lines which begin with a
-.B space
-character are not saved in the history list.
-A value of
-.I ignoredups
-causes lines matching the previous history entry to not be saved.
-A value of
-.I ignoreboth
-is shorthand for \fIignorespace\fP and \fIignoredups\fP.
-A value of
-.IR erasedups
-causes all previous lines matching the current line to be removed from
-the history list before that line is saved.
-Any value not in the above list is ignored.
-If
-.SM
-.B HISTCONTROL
-is unset, or does not include a valid value,
-all lines read by the shell parser are saved on the history list,
-subject to the value of
-.SM
-.BR HISTIGNORE .
-The second and subsequent lines of a multi-line compound command are
-not tested, and are added to the history regardless of the value of
-.SM
-.BR HISTCONTROL .
-.TP
-.B HISTFILE
-The name of the file in which command history is saved (see
-.SM
-.B HISTORY
-below). The default value is \fI~/.bash_history\fP. If unset, the
-command history is not saved when an interactive shell exits.
-.TP
-.B HISTFILESIZE
-The maximum number of lines contained in the history file. When this
-variable is assigned a value, the history file is truncated, if
-necessary, by removing the oldest entries,
-to contain no more than that number of lines. The default
-value is 500. The history file is also truncated to this size after
-writing it when an interactive shell exits.
-.TP
-.B HISTIGNORE
-A colon-separated list of patterns used to decide which command lines
-should be saved on the history list. Each pattern is anchored at the
-beginning of the line and must match the complete line (no implicit
-`\fB*\fP' is appended). Each pattern is tested against the line
-after the checks specified by
-.SM
-.B HISTCONTROL
-are applied.
-In addition to the normal shell pattern matching characters, `\fB&\fP'
-matches the previous history line. `\fB&\fP' may be escaped using a
-backslash; the backslash is removed before attempting a match.
-The second and subsequent lines of a multi-line compound command are
-not tested, and are added to the history regardless of the value of
-.SM
-.BR HISTIGNORE .
-.TP
-.B HISTSIZE
-The number of commands to remember in the command history (see
-.SM
-.B HISTORY
-below). The default value is 500.
-.TP
-.B HISTTIMEFORMAT
-If this variable is set and not null, its value is used as a format string
-for \fIstrftime\fP(3) to print the time stamp associated with each history
-entry displayed by the \fBhistory\fP builtin.
-If this variable is set, time stamps are written to the history file so
-they may be preserved across shell sessions.
-This uses the history comment character to distinguish timestamps from
-other history lines.
-.TP
-.B HOME
-The home directory of the current user; the default argument for the
-\fBcd\fP builtin command.
-The value of this variable is also used when performing tilde expansion.
-.TP
-.B HOSTFILE
-Contains the name of a file in the same format as
-.FN /etc/hosts
-that should be read when the shell needs to complete a
-hostname.
-The list of possible hostname completions may be changed while the
-shell is running;
-the next time hostname completion is attempted after the
-value is changed,
-.B bash
-adds the contents of the new file to the existing list.
-If
-.SM
-.B HOSTFILE
-is set, but has no value, or does not name a readable file,
-\fBbash\fP attempts to read
-.FN /etc/hosts
-to obtain the list of possible hostname completions.
-When
-.SM
-.B HOSTFILE
-is unset, the hostname list is cleared.
-.TP
-.B IFS
-The
-.I Internal Field Separator
-that is used
-for word splitting after expansion and to
-split lines into words with the
-.B read
-builtin command. The default value is
-``<space><tab><newline>''.
-.TP
-.B IGNOREEOF
-Controls the
-action of an interactive shell on receipt of an
-.SM
-.B EOF
-character as the sole input. If set, the value is the number of
-consecutive
-.SM
-.B EOF
-characters which must be
-typed as the first characters on an input line before
-.B bash
-exits. If the variable exists but does not have a numeric value, or
-has no value, the default value is 10. If it does not exist,
-.SM
-.B EOF
-signifies the end of input to the shell.
-.TP
-.B INPUTRC
-The filename for the
-.B readline
-startup file, overriding the default of
-.FN ~/.inputrc
-(see
-.SM
-.B READLINE
-below).
-.TP
-.B LANG
-Used to determine the locale category for any category not specifically
-selected with a variable starting with \fBLC_\fP.
-.TP
-.B LC_ALL
-This variable overrides the value of
-.SM
-.B LANG
-and any other
-\fBLC_\fP variable specifying a locale category.
-.TP
-.B LC_COLLATE
-This variable determines the collation order used when sorting the
-results of pathname expansion, and determines the behavior of range
-expressions, equivalence classes, and collating sequences within
-pathname expansion and pattern matching.
-.TP
-.B LC_CTYPE
-This variable determines the interpretation of characters and the
-behavior of character classes within pathname expansion and pattern
-matching.
-.TP
-.B LC_MESSAGES
-This variable determines the locale used to translate double-quoted
-strings preceded by a \fB$\fP.
-.TP
-.B LC_NUMERIC
-This variable determines the locale category used for number formatting.
-.TP
-.B LINES
-Used by the \fBselect\fP compound command to determine the column length
-for printing selection lists. Automatically set by an interactive shell
-upon receipt of a
-.SM
-.BR SIGWINCH .
-.TP
-.B MAIL
-If this parameter is set to a file or directory name and the
-.SM
-.B MAILPATH
-variable is not set,
-.B bash
-informs the user of the arrival of mail in the specified file or
-Maildir-format directory.
-.TP
-.B MAILCHECK
-Specifies how
-often (in seconds)
-.B bash
-checks for mail. The default is 60 seconds. When it is time to check
-for mail, the shell does so before displaying the primary prompt.
-If this variable is unset, or set to a value that is not a number
-greater than or equal to zero, the shell disables mail checking.
-.TP
-.B MAILPATH
-A colon-separated list of file names to be checked for mail.
-The message to be printed when mail arrives in a particular file
-may be specified by separating the file name from the message with a `?'.
-When used in the text of the message, \fB$_\fP expands to the name of
-the current mailfile.
-Example:
-.RS
-.PP
-\fBMAILPATH\fP=\(aq/var/mail/bfox?"You have mail":~/shell\-mail?"$_ has mail!"\(aq
-.PP
-.B Bash
-supplies a default value for this variable, but the location of the user
-mail files that it uses is system dependent (e.g., /var/mail/\fB$USER\fP).
-.RE
-.TP
-.B OPTERR
-If set to the value 1,
-.B bash
-displays error messages generated by the
-.B getopts
-builtin command (see
-.SM
-.B SHELL BUILTIN COMMANDS
-below).
-.SM
-.B OPTERR
-is initialized to 1 each time the shell is invoked or a shell
-script is executed.
-.TP
-.B PATH
-The search path for commands. It
-is a colon-separated list of directories in which
-the shell looks for commands (see
-.SM
-.B COMMAND EXECUTION
-below).
-A zero-length (null) directory name in the value of
-.SM
-.B PATH
-indicates the current directory.
-A null directory name may appear as two adjacent colons, or as an initial
-or trailing colon.
-The default path is system-dependent,
-and is set by the administrator who installs
-.BR bash .
-A common value is
-.if t \f(CW/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin\fP.
-.if n ``/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin''.
-.TP
-.B POSIXLY_CORRECT
-If this variable is in the environment when \fBbash\fP starts, the shell
-enters \fIposix mode\fP before reading the startup files, as if the
-.B \-\-posix
-invocation option had been supplied. If it is set while the shell is
-running, \fBbash\fP enables \fIposix mode\fP, as if the command
-.if t \f(CWset -o posix\fP
-.if n \fIset -o posix\fP
-had been executed.
-.TP
-.B PROMPT_COMMAND
-If set, the value is executed as a command prior to issuing each primary
-prompt.
-.TP
-.B PROMPT_DIRTRIM
-If set to a number greater than zero, the value is used as the number of
-trailing directory components to retain when expanding the \fB\ew\fP and
-\fB\eW\fP prompt string escapes (see
-.SM
-.B PROMPTING
-below). Characters removed are replaced with an ellipsis.
-.TP
-.B PS1
-The value of this parameter is expanded (see
-.SM
-.B PROMPTING
-below) and used as the primary prompt string. The default value is
-``\fB\es\-\ev\e$ \fP''.
-.TP
-.B PS2
-The value of this parameter is expanded as with
-.SM
-.B PS1
-and used as the secondary prompt string. The default is
-``\fB> \fP''.
-.TP
-.B PS3
-The value of this parameter is used as the prompt for the
-.B select
-command (see
-.SM
-.B SHELL GRAMMAR
-above).
-.TP
-.B PS4
-The value of this parameter is expanded as with
-.SM
-.B PS1
-and the value is printed before each command
-.B bash
-displays during an execution trace. The first character of
-.SM
-.B PS4
-is replicated multiple times, as necessary, to indicate multiple
-levels of indirection. The default is ``\fB+ \fP''.
-.TP
-.B SHELL
-The full pathname to the shell is kept in this environment variable.
-If it is not set when the shell starts,
-.B bash
-assigns to it the full pathname of the current user's login shell.
-.TP
-.B TIMEFORMAT
-The value of this parameter is used as a format string specifying
-how the timing information for pipelines prefixed with the
-.B time
-reserved word should be displayed.
-The \fB%\fP character introduces an escape sequence that is
-expanded to a time value or other information.
-The escape sequences and their meanings are as follows; the
-braces denote optional portions.
-.sp .5
-.RS
-.PD 0
-.TP 10
-.B %%
-A literal \fB%\fP.
-.TP
-.B %[\fIp\fP][l]R
-The elapsed time in seconds.
-.TP
-.B %[\fIp\fP][l]U
-The number of CPU seconds spent in user mode.
-.TP
-.B %[\fIp\fP][l]S
-The number of CPU seconds spent in system mode.
-.TP
-.B %P
-The CPU percentage, computed as (%U + %S) / %R.
-.PD
-.RE
-.IP
-The optional \fIp\fP is a digit specifying the \fIprecision\fP,
-the number of fractional digits after a decimal point.
-A value of 0 causes no decimal point or fraction to be output.
-At most three places after the decimal point may be specified;
-values of \fIp\fP greater than 3 are changed to 3.
-If \fIp\fP is not specified, the value 3 is used.
-.IP
-The optional \fBl\fP specifies a longer format, including
-minutes, of the form \fIMM\fPm\fISS\fP.\fIFF\fPs.
-The value of \fIp\fP determines whether or not the fraction is
-included.
-.IP
-If this variable is not set, \fBbash\fP acts as if it had the
-value \fB$\(aq\enreal\et%3lR\enuser\et%3lU\ensys\t%3lS\(aq\fP.
-If the value is null, no timing information is displayed.
-A trailing newline is added when the format string is displayed.
-.PD 0
-.TP
-.B TMOUT
-If set to a value greater than zero,
-.SM
-.B TMOUT
-is treated as the
-default timeout for the \fBread\fP builtin.
-The \fBselect\fP command terminates if input does not arrive
-after
-.SM
-.B TMOUT
-seconds when input is coming from a terminal.
-In an interactive shell, the value is interpreted as the
-number of seconds to wait for input after issuing the primary prompt.
-.B Bash
-terminates after waiting for that number of seconds if input does
-not arrive.
-.TP
-.B TMPDIR
-If set, \fBbash\fP uses its value as the name of a directory in which
-\fBbash\fP creates temporary files for the shell's use.
-.TP
-.B auto_resume
-This variable controls how the shell interacts with the user and
-job control. If this variable is set, single word simple
-commands without redirections are treated as candidates for resumption
-of an existing stopped job. There is no ambiguity allowed; if there is
-more than one job beginning with the string typed, the job most recently
-accessed is selected. The
-.I name
-of a stopped job, in this context, is the command line used to
-start it.
-If set to the value
-.IR exact ,
-the string supplied must match the name of a stopped job exactly;
-if set to
-.IR substring ,
-the string supplied needs to match a substring of the name of a
-stopped job. The
-.I substring
-value provides functionality analogous to the
-.B %?
-job identifier (see
-.SM
-.B JOB CONTROL
-below). If set to any other value, the supplied string must
-be a prefix of a stopped job's name; this provides functionality
-analogous to the \fB%\fP\fIstring\fP job identifier.
-.TP
-.B histchars
-The two or three characters which control history expansion
-and tokenization (see
-.SM
-.B HISTORY EXPANSION
-below). The first character is the \fIhistory expansion\fP character,
-the character which signals the start of a history
-expansion, normally `\fB!\fP'.
-The second character is the \fIquick substitution\fP
-character, which is used as shorthand for re-running the previous
-command entered, substituting one string for another in the command.
-The default is `\fB^\fP'.
-The optional third character is the character
-which indicates that the remainder of the line is a comment when found
-as the first character of a word, normally `\fB#\fP'. The history
-comment character causes history substitution to be skipped for the
-remaining words on the line. It does not necessarily cause the shell
-parser to treat the rest of the line as a comment.
-.PD
-.SS Arrays
-.B Bash
-provides one-dimensional indexed and associative array variables.
-Any variable may be used as an indexed array; the
-.B declare
-builtin will explicitly declare an array.
-There is no maximum
-limit on the size of an array, nor any requirement that members
-be indexed or assigned contiguously.
-Indexed arrays are referenced using integers (including arithmetic
-expressions) and are zero-based; associative arrays are referenced
-using arbitrary strings.
-.PP
-An indexed array is created automatically if any variable is assigned to
-using the syntax \fIname\fP[\fIsubscript\fP]=\fIvalue\fP. The
-.I subscript
-is treated as an arithmetic expression that must evaluate to a number.
-To explicitly declare an indexed array, use
-.B declare \-a \fIname\fP
-(see
-.SM
-.B SHELL BUILTIN COMMANDS
-below).
-.B declare \-a \fIname\fP[\fIsubscript\fP]
-is also accepted; the \fIsubscript\fP is ignored.
-.PP
-Associative arrays are created using
-.BR "declare \-A \fIname\fP" .
-.PP
-Attributes may be
-specified for an array variable using the
-.B declare
-and
-.B readonly
-builtins. Each attribute applies to all members of an array.
-.PP
-Arrays are assigned to using compound assignments of the form
-\fIname\fP=\fB(\fPvalue\fI1\fP ... value\fIn\fP\fB)\fP, where each
-\fIvalue\fP is of the form [\fIsubscript\fP]=\fIstring\fP.
-Indexed array assignments do not require the bracket and subscript.
-When assigning to indexed arrays, if the optional brackets and subscript
-are supplied, that index is assigned to;
-otherwise the index of the element assigned is the last index assigned
-to by the statement plus one. Indexing starts at zero.
-.PP
-When assigning to an associative array, the subscript is required.
-.PP
-This syntax is also accepted by the
-.B declare
-builtin. Individual array elements may be assigned to using the
-\fIname\fP[\fIsubscript\fP]=\fIvalue\fP syntax introduced above.
-.PP
-Any element of an array may be referenced using
-${\fIname\fP[\fIsubscript\fP]}. The braces are required to avoid
-conflicts with pathname expansion. If
-\fIsubscript\fP is \fB@\fP or \fB*\fP, the word expands to
-all members of \fIname\fP. These subscripts differ only when the
-word appears within double quotes. If the word is double-quoted,
-${\fIname\fP[*]} expands to a single
-word with the value of each array member separated by the first
-character of the
-.SM
-.B IFS
-special variable, and ${\fIname\fP[@]} expands each element of
-\fIname\fP to a separate word. When there are no array members,
-${\fIname\fP[@]} expands to nothing.
-If the double-quoted expansion occurs within a word, the expansion of
-the first parameter is joined with the beginning part of the original
-word, and the expansion of the last parameter is joined with the last
-part of the original word.
-This is analogous to the expansion
-of the special parameters \fB*\fP and \fB@\fP (see
-.B Special Parameters
-above). ${#\fIname\fP[\fIsubscript\fP]} expands to the length of
-${\fIname\fP[\fIsubscript\fP]}. If \fIsubscript\fP is \fB*\fP or
-\fB@\fP, the expansion is the number of elements in the array.
-Referencing an array variable without a subscript is equivalent to
-referencing the array with a subscript of 0.
-If the
-.I subscript
-used to reference an element of an indexed array
-evaluates to a number less than zero, it is used as
-an offset from one greater than the array's maximum index (so a subcript
-of -1 refers to the last element of the array).
-.PP
-An array variable is considered set if a subscript has been assigned a
-value. The null string is a valid value.
-.PP
-The
-.B unset
-builtin is used to destroy arrays. \fBunset\fP \fIname\fP[\fIsubscript\fP]
-destroys the array element at index \fIsubscript\fP.
-Care must be taken to avoid unwanted side effects caused by pathname
-expansion.
-\fBunset\fP \fIname\fP, where \fIname\fP is an array, or
-\fBunset\fP \fIname\fP[\fIsubscript\fP], where
-\fIsubscript\fP is \fB*\fP or \fB@\fP, removes the entire array.
-.PP
-The
-.BR declare ,
-.BR local ,
-and
-.B readonly
-builtins each accept a
-.B \-a
-option to specify an indexed array and a
-.B \-A
-option to specify an associative array.
-If both options are supplied,
-.B \-A
-takes precedence.
-The
-.B read
-builtin accepts a
-.B \-a
-option to assign a list of words read from the standard input
-to an array. The
-.B set
-and
-.B declare
-builtins display array values in a way that allows them to be
-reused as assignments.
-.SH EXPANSION
-Expansion is performed on the command line after it has been split into
-words. There are seven kinds of expansion performed:
-.IR "brace expansion" ,
-.IR "tilde expansion" ,
-.IR "parameter and variable expansion" ,
-.IR "command substitution" ,
-.IR "arithmetic expansion" ,
-.IR "word splitting" ,
-and
-.IR "pathname expansion" .
-.PP
-The order of expansions is: brace expansion, tilde expansion,
-parameter, variable and arithmetic expansion and
-command substitution
-(done in a left-to-right fashion), word splitting, and pathname
-expansion.
-.PP
-On systems that can support it, there is an additional expansion
-available: \fIprocess substitution\fP.
-.PP
-Only brace expansion, word splitting, and pathname expansion
-can change the number of words of the expansion; other expansions
-expand a single word to a single word.
-The only exceptions to this are the expansions of
-"\fB$@\fP" and "\fB${\fP\fIname\fP\fB[@]}\fP"
-as explained above (see
-.SM
-.BR PARAMETERS ).
-.SS Brace Expansion
-.PP
-.I "Brace expansion"
-is a mechanism by which arbitrary strings
-may be generated. This mechanism is similar to
-\fIpathname expansion\fP, but the filenames generated
-need not exist. Patterns to be brace expanded take
-the form of an optional
-.IR preamble ,
-followed by either a series of comma-separated strings or
-a sequence expression between a pair of braces, followed by
-an optional
-.IR postscript .
-The preamble is prefixed to each string contained
-within the braces, and the postscript is then appended
-to each resulting string, expanding left to right.
-.PP
-Brace expansions may be nested. The results of each expanded
-string are not sorted; left to right order is preserved.
-For example, a\fB{\fPd,c,b\fB}\fPe expands into `ade ace abe'.
-.PP
-A sequence expression takes the form
-\fB{\fP\fIx\fP\fB..\fP\fIy\fP\fB[..\fP\fIincr\fP\fB]}\fP,
-where \fIx\fP and \fIy\fP are either integers or single characters,
-and \fIincr\fP, an optional increment, is an integer.
-When integers are supplied, the expression expands to each number between
-\fIx\fP and \fIy\fP, inclusive.
-Supplied integers may be prefixed with \fI0\fP to force each term to have the
-same width. When either \fIx\fP or \fPy\fP begins with a zero, the shell
-attempts to force all generated terms to contain the same number of digits,
-zero-padding where necessary.
-When characters are supplied, the expression expands to each character
-lexicographically between \fIx\fP and \fIy\fP, inclusive. Note that
-both \fIx\fP and \fIy\fP must be of the same type.
-When the increment is supplied, it is used as the difference between
-each term. The default increment is 1 or -1 as appropriate.
-.PP
-Brace expansion is performed before any other expansions,
-and any characters special to other expansions are preserved
-in the result. It is strictly textual.
-.B Bash
-does not apply any syntactic interpretation to the context of the
-expansion or the text between the braces.
-.PP
-A correctly-formed brace expansion must contain unquoted opening
-and closing braces, and at least one unquoted comma or a valid
-sequence expression.
-Any incorrectly formed brace expansion is left unchanged.
-A \fB{\fP or \fB,\fP may be quoted with a backslash to prevent its
-being considered part of a brace expression.
-To avoid conflicts with parameter expansion, the string \fB${\fP
-is not considered eligible for brace expansion.
-.PP
-This construct is typically used as shorthand when the common
-prefix of the strings to be generated is longer than in the
-above example:
-.RS
-.PP
-mkdir /usr/local/src/bash/{old,new,dist,bugs}
-.RE
-or
-.RS
-chown root /usr/{ucb/{ex,edit},lib/{ex?.?*,how_ex}}
-.RE
-.PP
-Brace expansion introduces a slight incompatibility with
-historical versions of
-.BR sh .
-.B sh
-does not treat opening or closing braces specially when they
-appear as part of a word, and preserves them in the output.
-.B Bash
-removes braces from words as a consequence of brace
-expansion. For example, a word entered to
-.B sh
-as \fIfile{1,2}\fP
-appears identically in the output. The same word is
-output as
-.I file1 file2
-after expansion by
-.BR bash .
-If strict compatibility with
-.B sh
-is desired, start
-.B bash
-with the
-.B +B
-option or disable brace expansion with the
-.B +B
-option to the
-.B set
-command (see
-.SM
-.B SHELL BUILTIN COMMANDS
-below).
-.SS Tilde Expansion
-.PP
-If a word begins with an unquoted tilde character (`\fB~\fP'), all of
-the characters preceding the first unquoted slash (or all characters,
-if there is no unquoted slash) are considered a \fItilde-prefix\fP.
-If none of the characters in the tilde-prefix are quoted, the
-characters in the tilde-prefix following the tilde are treated as a
-possible \fIlogin name\fP.
-If this login name is the null string, the tilde is replaced with the
-value of the shell parameter
-.SM
-.BR HOME .
-If
-.SM
-.B HOME
-is unset, the home directory of the user executing the shell is
-substituted instead.
-Otherwise, the tilde-prefix is replaced with the home directory
-associated with the specified login name.
-.PP
-If the tilde-prefix is a `~+', the value of the shell variable
-.SM
-.B PWD
-replaces the tilde-prefix.
-If the tilde-prefix is a `~\-', the value of the shell variable
-.SM
-.BR OLDPWD ,
-if it is set, is substituted.
-If the characters following the tilde in the tilde-prefix consist
-of a number \fIN\fP, optionally prefixed
-by a `+' or a `\-', the tilde-prefix is replaced with the corresponding
-element from the directory stack, as it would be displayed by the
-.B dirs
-builtin invoked with the tilde-prefix as an argument.
-If the characters following the tilde in the tilde-prefix consist of a
-number without a leading `+' or `\-', `+' is assumed.
-.PP
-If the login name is invalid, or the tilde expansion fails, the word
-is unchanged.
-.PP
-Each variable assignment is checked for unquoted tilde-prefixes immediately
-following a
-.B :
-or the first
-.BR = .
-In these cases, tilde expansion is also performed.
-Consequently, one may use file names with tildes in assignments to
-.SM
-.BR PATH ,
-.SM
-.BR MAILPATH ,
-and
-.SM
-.BR CDPATH ,
-and the shell assigns the expanded value.
-.SS Parameter Expansion
-.PP
-The `\fB$\fP' character introduces parameter expansion,
-command substitution, or arithmetic expansion. The parameter name
-or symbol to be expanded may be enclosed in braces, which
-are optional but serve to protect the variable to be expanded from
-characters immediately following it which could be
-interpreted as part of the name.
-.PP
-When braces are used, the matching ending brace is the first `\fB}\fP'
-not escaped by a backslash or within a quoted string, and not within an
-embedded arithmetic expansion, command substitution, or parameter
-expansion.
-.PP
-.PD 0
-.TP
-${\fIparameter\fP}
-The value of \fIparameter\fP is substituted. The braces are required
-when
-.I parameter
-is a positional parameter with more than one digit,
-or when
-.I parameter
-is followed by a character which is not to be
-interpreted as part of its name.
-.PD
-.PP
-If the first character of \fIparameter\fP is an exclamation point (\fB!\fP),
-a level of variable indirection is introduced.
-\fBBash\fP uses the value of the variable formed from the rest of
-\fIparameter\fP as the name of the variable; this variable is then
-expanded and that value is used in the rest of the substitution, rather
-than the value of \fIparameter\fP itself.
-This is known as \fIindirect expansion\fP.
-The exceptions to this are the expansions of ${\fB!\fP\fIprefix\fP\fB*\fP} and
-${\fB!\fP\fIname\fP[\fI@\fP]} described below.
-The exclamation point must immediately follow the left brace in order to
-introduce indirection.
-.PP
-In each of the cases below, \fIword\fP is subject to tilde expansion,
-parameter expansion, command substitution, and arithmetic expansion.
-.PP
-When not performing substring expansion, using the forms documented below,
-\fBbash\fP tests for a parameter that is unset or null. Omitting the colon
-results in a test only for a parameter that is unset.
-.PP
-.PD 0
-.TP
-${\fIparameter\fP\fB:\-\fP\fIword\fP}
-\fBUse Default Values\fP. If
-.I parameter
-is unset or null, the expansion of
-.I word
-is substituted. Otherwise, the value of
-.I parameter
-is substituted.
-.TP
-${\fIparameter\fP\fB:=\fP\fIword\fP}
-\fBAssign Default Values\fP.
-If
-.I parameter
-is unset or null, the expansion of
-.I word
-is assigned to
-.IR parameter .
-The value of
-.I parameter
-is then substituted. Positional parameters and special parameters may
-not be assigned to in this way.
-.TP
-${\fIparameter\fP\fB:?\fP\fIword\fP}
-\fBDisplay Error if Null or Unset\fP.
-If
-.I parameter
-is null or unset, the expansion of \fIword\fP (or a message to that effect
-if
-.I word
-is not present) is written to the standard error and the shell, if it
-is not interactive, exits. Otherwise, the value of \fIparameter\fP is
-substituted.
-.TP
-${\fIparameter\fP\fB:+\fP\fIword\fP}
-\fBUse Alternate Value\fP.
-If
-.I parameter
-is null or unset, nothing is substituted, otherwise the expansion of
-.I word
-is substituted.
-.TP
-${\fIparameter\fP\fB:\fP\fIoffset\fP}
-.PD 0
-.TP
-${\fIparameter\fP\fB:\fP\fIoffset\fP\fB:\fP\fIlength\fP}
-.PD
-\fBSubstring Expansion\fP.
-Expands to up to \fIlength\fP characters of \fIparameter\fP
-starting at the character specified by \fIoffset\fP.
-If \fIlength\fP is omitted, expands to the substring of
-\fIparameter\fP starting at the character specified by \fIoffset\fP.
-\fIlength\fP and \fIoffset\fP are arithmetic expressions (see
-.SM
-.B
-ARITHMETIC EVALUATION
-below).
-If \fIoffset\fP evaluates to a number less than zero, the value
-is used as an offset from the end of the value of \fIparameter\fP.
-If \fIlength\fP evaluates to a number less than zero, and \fIparameter\fP
-is not \fB@\fP and not an indexed or associative array, it is interpreted
-as an offset from the end of the value of \fIparameter\fP rather than
-a number of characters, and the expansion is the characters between the
-two offsets.
-If \fIparameter\fP is \fB@\fP, the result is \fIlength\fP positional
-parameters beginning at \fIoffset\fP.
-If \fIparameter\fP is an indexed array name subscripted by @ or *,
-the result is the \fIlength\fP
-members of the array beginning with ${\fIparameter\fP[\fIoffset\fP]}.
-A negative \fIoffset\fP is taken relative to one greater than the maximum
-index of the specified array.
-Substring expansion applied to an associative array produces undefined
-results.
-Note that a negative offset must be separated from the colon by at least
-one space to avoid being confused with the :- expansion.
-Substring indexing is zero-based unless the positional parameters
-are used, in which case the indexing starts at 1 by default.
-If \fIoffset\fP is 0, and the positional parameters are used, \fB$0\fP is
-prefixed to the list.
-.TP
-${\fB!\fP\fIprefix\fP\fB*\fP}
-.PD 0
-.TP
-${\fB!\fP\fIprefix\fP\fB@\fP}
-.PD
-\fBNames matching prefix\fP.
-Expands to the names of variables whose names begin with \fIprefix\fP,
-separated by the first character of the
-.SM
-.B IFS
-special variable.
-When \fI@\fP is used and the expansion appears within double quotes, each
-variable name expands to a separate word.
-.TP
-${\fB!\fP\fIname\fP[\fI@\fP]}
-.PD 0
-.TP
-${\fB!\fP\fIname\fP[\fI*\fP]}
-.PD
-\fBList of array keys\fP.
-If \fIname\fP is an array variable, expands to the list of array indices
-(keys) assigned in \fIname\fP.
-If \fIname\fP is not an array, expands to 0 if \fIname\fP is set and null
-otherwise.
-When \fI@\fP is used and the expansion appears within double quotes, each
-key expands to a separate word.
-.TP
-${\fB#\fP\fIparameter\fP}
-\fBParameter length\fP.
-The length in characters of the value of \fIparameter\fP is substituted.
-If
-.I parameter
-is
-.B *
-or
-.BR @ ,
-the value substituted is the number of positional parameters.
-If
-.I parameter
-is an array name subscripted by
-.B *
-or
-.BR @ ,
-the value substituted is the number of elements in the array.
-.TP
-${\fIparameter\fP\fB#\fP\fIword\fP}
-.PD 0
-.TP
-${\fIparameter\fP\fB##\fP\fIword\fP}
-.PD
-\fBRemove matching prefix pattern\fP.
-The
-.I word
-is expanded to produce a pattern just as in pathname
-expansion. If the pattern matches the beginning of
-the value of
-.IR parameter ,
-then the result of the expansion is the expanded value of
-.I parameter
-with the shortest matching pattern (the ``\fB#\fP'' case) or the
-longest matching pattern (the ``\fB##\fP'' case) deleted.
-If
-.I parameter
-is
-.B @
-or
-.BR * ,
-the pattern removal operation is applied to each positional
-parameter in turn, and the expansion is the resultant list.
-If
-.I parameter
-is an array variable subscripted with
-.B @
-or
-.BR * ,
-the pattern removal operation is applied to each member of the
-array in turn, and the expansion is the resultant list.
-.TP
-${\fIparameter\fP\fB%\fP\fIword\fP}
-.PD 0
-.TP
-${\fIparameter\fP\fB%%\fP\fIword\fP}
-.PD
-\fBRemove matching suffix pattern\fP.
-The \fIword\fP is expanded to produce a pattern just as in
-pathname expansion.
-If the pattern matches a trailing portion of the expanded value of
-.IR parameter ,
-then the result of the expansion is the expanded value of
-.I parameter
-with the shortest matching pattern (the ``\fB%\fP'' case) or the
-longest matching pattern (the ``\fB%%\fP'' case) deleted.
-If
-.I parameter
-is
-.B @
-or
-.BR * ,
-the pattern removal operation is applied to each positional
-parameter in turn, and the expansion is the resultant list.
-If
-.I parameter
-is an array variable subscripted with
-.B @
-or
-.BR * ,
-the pattern removal operation is applied to each member of the
-array in turn, and the expansion is the resultant list.
-.TP
-${\fIparameter\fP\fB/\fP\fIpattern\fP\fB/\fP\fIstring\fP}
-\fBPattern substitution\fP.
-The \fIpattern\fP is expanded to produce a pattern just as in
-pathname expansion.
-\fIParameter\fP is expanded and the longest match of \fIpattern\fP
-against its value is replaced with \fIstring\fP.
-If \fIpattern\fP begins with \fB/\fP, all matches of \fIpattern\fP are
-replaced with \fIstring\fP. Normally only the first match is replaced.
-If \fIpattern\fP begins with \fB#\fP, it must match at the beginning
-of the expanded value of \fIparameter\fP.
-If \fIpattern\fP begins with \fB%\fP, it must match at the end
-of the expanded value of \fIparameter\fP.
-If \fIstring\fP is null, matches of \fIpattern\fP are deleted
-and the \fB/\fP following \fIpattern\fP may be omitted.
-If
-.I parameter
-is
-.B @
-or
-.BR * ,
-the substitution operation is applied to each positional
-parameter in turn, and the expansion is the resultant list.
-If
-.I parameter
-is an array variable subscripted with
-.B @
-or
-.BR * ,
-the substitution operation is applied to each member of the
-array in turn, and the expansion is the resultant list.
-.TP
-${\fIparameter\fP\fB^\fP\fIpattern\fP}
-.PD 0
-.TP
-${\fIparameter\fP\fB^^\fP\fIpattern\fP}
-.TP
-${\fIparameter\fP\fB,\fP\fIpattern\fP}
-.TP
-${\fIparameter\fP\fB,,\fP\fIpattern\fP}
-.PD
-\fBCase modification\fP.
-This expansion modifies the case of alphabetic characters in \fIparameter\fP.
-The \fIpattern\fP is expanded to produce a pattern just as in
-pathname expansion.
-The \fB^\fP operator converts lowercase letters matching \fIpattern\fP
-to uppercase; the \fB,\fP operator converts matching uppercase letters
-to lowercase.
-The \fB^^\fP and \fB,,\fP expansions convert each matched character in the
-expanded value; the \fB^\fP and \fB,\fP expansions match and convert only
-the first character in the expanded value.
-If \fIpattern\fP is omitted, it is treated like a \fB?\fP, which matches
-every character.
-If
-.I parameter
-is
-.B @
-or
-.BR * ,
-the case modification operation is applied to each positional
-parameter in turn, and the expansion is the resultant list.
-If
-.I parameter
-is an array variable subscripted with
-.B @
-or
-.BR * ,
-the case modification operation is applied to each member of the
-array in turn, and the expansion is the resultant list.
-.SS Command Substitution
-.PP
-\fICommand substitution\fP allows the output of a command to replace
-the command name. There are two forms:
-.RS
-.PP
-\fB$(\fP\fIcommand\fP\|\fB)\fP
-.RE
-or
-.RS
-\fB\`\fP\fIcommand\fP\fB\`\fP
-.RE
-.PP
-.B Bash
-performs the expansion by executing \fIcommand\fP and
-replacing the command substitution with the standard output of the
-command, with any trailing newlines deleted.
-Embedded newlines are not deleted, but they may be removed during
-word splitting.
-The command substitution \fB$(cat \fIfile\fP)\fR can be replaced by
-the equivalent but faster \fB$(< \fIfile\fP)\fR.
-.PP
-When the old-style backquote form of substitution is used,
-backslash retains its literal meaning except when followed by
-.BR $ ,
-.BR \` ,
-or
-.BR \e .
-The first backquote not preceded by a backslash terminates the
-command substitution.
-When using the $(\^\fIcommand\fP\|) form, all characters between the
-parentheses make up the command; none are treated specially.
-.PP
-Command substitutions may be nested. To nest when using the backquoted form,
-escape the inner backquotes with backslashes.
-.PP
-If the substitution appears within double quotes, word splitting and
-pathname expansion are not performed on the results.
-.SS Arithmetic Expansion
-.PP
-Arithmetic expansion allows the evaluation of an arithmetic expression
-and the substitution of the result. The format for arithmetic expansion is:
-.RS
-.PP
-\fB$((\fP\fIexpression\fP\fB))\fP
-.RE
-.PP
-The
-.I expression
-is treated as if it were within double quotes, but a double quote
-inside the parentheses is not treated specially.
-All tokens in the expression undergo parameter expansion, string
-expansion, command substitution, and quote removal.
-Arithmetic expansions may be nested.
-.PP
-The evaluation is performed according to the rules listed below under
-.SM
-.BR "ARITHMETIC EVALUATION" .
-If
-.I expression
-is invalid,
-.B bash
-prints a message indicating failure and no substitution occurs.
-.SS Process Substitution
-.PP
-\fIProcess substitution\fP is supported on systems that support named
-pipes (\fIFIFOs\fP) or the \fB/dev/fd\fP method of naming open files.
-It takes the form of
-\fB<(\fP\fIlist\^\fP\fB)\fP
-or
-\fB>(\fP\fIlist\^\fP\fB)\fP.
-The process \fIlist\fP is run with its input or output connected to a
-\fIFIFO\fP or some file in \fB/dev/fd\fP. The name of this file is
-passed as an argument to the current command as the result of the
-expansion. If the \fB>(\fP\fIlist\^\fP\fB)\fP form is used, writing to
-the file will provide input for \fIlist\fP. If the
-\fB<(\fP\fIlist\^\fP\fB)\fP form is used, the file passed as an
-argument should be read to obtain the output of \fIlist\fP.
-.PP
-When available, process substitution is performed
-simultaneously with parameter and variable expansion,
-command substitution,
-and arithmetic expansion.
-.SS Word Splitting
-.PP
-The shell scans the results of
-parameter expansion,
-command substitution,
-and
-arithmetic expansion
-that did not occur within double quotes for
-.IR "word splitting" .
-.PP
-The shell treats each character of
-.SM
-.B IFS
-as a delimiter, and splits the results of the other
-expansions into words on these characters. If
-.SM
-.B IFS
-is unset, or its
-value is exactly
-.BR <space><tab><newline> ,
-the default, then
-sequences of
-.BR <space> ,
-.BR <tab> ,
-and
-.B <newline>
-at the beginning and end of the results of the previous
-expansions are ignored, and
-any sequence of
-.SM
-.B IFS
-characters not at the beginning or end serves to delimit words.
-If
-.SM
-.B IFS
-has a value other than the default, then sequences of
-the whitespace characters
-.B space
-and
-.B tab
-are ignored at the beginning and end of the
-word, as long as the whitespace character is in the
-value of
-.SM
-.BR IFS
-(an
-.SM
-.B IFS
-whitespace character).
-Any character in
-.SM
-.B IFS
-that is not
-.SM
-.B IFS
-whitespace, along with any adjacent
-.SM
-.B IFS
-whitespace characters, delimits a field.
-A sequence of
-.SM
-.B IFS
-whitespace characters is also treated as a delimiter.
-If the value of
-.SM
-.B IFS
-is null, no word splitting occurs.
-.PP
-Explicit null arguments (\^\f3"\^"\fP or \^\f3\(aq\^\(aq\fP\^) are retained.
-Unquoted implicit null arguments, resulting from the expansion of
-parameters that have no values, are removed.
-If a parameter with no value is expanded within double quotes, a
-null argument results and is retained.
-.PP
-Note that if no expansion occurs, no splitting
-is performed.
-.SS Pathname Expansion
-.PP
-After word splitting,
-unless the
-.B \-f
-option has been set,
-.B bash
-scans each word for the characters
-.BR * ,
-.BR ? ,
-and
-.BR [ .
-If one of these characters appears, then the word is
-regarded as a
-.IR pattern ,
-and replaced with an alphabetically sorted list of
-file names matching the pattern
-(see
-.SM
-.B "Pattern Matching"
-below).
-If no matching file names are found,
-and the shell option
-.B nullglob
-is not enabled, the word is left unchanged.
-If the
-.B nullglob
-option is set, and no matches are found,
-the word is removed.
-If the
-.B failglob
-shell option is set, and no matches are found, an error message
-is printed and the command is not executed.
-If the shell option
-.B nocaseglob
-is enabled, the match is performed without regard to the case
-of alphabetic characters.
-When a pattern is used for pathname expansion,
-the character
-.B ``.''
-at the start of a name or immediately following a slash
-must be matched explicitly, unless the shell option
-.B dotglob
-is set.
-When matching a pathname, the slash character must always be
-matched explicitly.
-In other cases, the
-.B ``.''
-character is not treated specially.
-See the description of
-.B shopt
-below under
-.SM
-.B SHELL BUILTIN COMMANDS
-for a description of the
-.BR nocaseglob ,
-.BR nullglob ,
-.BR failglob ,
-and
-.B dotglob
-shell options.
-.PP
-The
-.SM
-.B GLOBIGNORE
-shell variable may be used to restrict the set of file names matching a
-.IR pattern .
-If
-.SM
-.B GLOBIGNORE
-is set, each matching file name that also matches one of the patterns in
-.SM
-.B GLOBIGNORE
-is removed from the list of matches.
-The file names
-.B ``.''
-and
-.B ``..''
-are always ignored when
-.SM
-.B GLOBIGNORE
-is set and not null. However, setting
-.SM
-.B GLOBIGNORE
-to a non-null value has the effect of enabling the
-.B dotglob
-shell option, so all other file names beginning with a
-.B ``.''
-will match.
-To get the old behavior of ignoring file names beginning with a
-.BR ``.'' ,
-make
-.B ``.*''
-one of the patterns in
-.SM
-.BR GLOBIGNORE .
-The
-.B dotglob
-option is disabled when
-.SM
-.B GLOBIGNORE
-is unset.
-.PP
-\fBPattern Matching\fP
-.PP
-Any character that appears in a pattern, other than the special pattern
-characters described below, matches itself. The NUL character may not
-occur in a pattern. A backslash escapes the following character; the
-escaping backslash is discarded when matching.
-The special pattern characters must be quoted if
-they are to be matched literally.
-.PP
-The special pattern characters have the following meanings:
-.PP
-.PD 0
-.RS
-.TP
-.B *
-Matches any string, including the null string.
-When the \fBglobstar\fP shell option is enabled, and \fB*\fP is used in
-a pathname expansion context, two adjacent \fB*\fPs used as a single
-pattern will match all files and zero or more directories and
-subdirectories.
-If followed by a \fB/\fP, two adjacent \fB*\fPs will match only directories
-and subdirectories.
-.TP
-.B ?
-Matches any single character.
-.TP
-.B [...]
-Matches any one of the enclosed characters. A pair of characters
-separated by a hyphen denotes a
-\fIrange expression\fP;
-any character that sorts between those two characters, inclusive,
-using the current locale's collating sequence and character set,
-is matched. If the first character following the
-.B [
-is a
-.B !
-or a
-.B ^
-then any character not enclosed is matched.
-The sorting order of characters in range expressions is determined by
-the current locale and the values of the
-.SM
-.B LC_COLLATE
-or
-.SM
-.B LC_ALL
-shell variables, if set.
-To obtain the traditional interpretation of range expressions, where
-.B [a\-d]
-is equivalent to
-.BR [abcd] ,
-set value of the
-.B LC_ALL
-shell variable to
-.BR C .
-A
-.B \-
-may be matched by including it as the first or last character
-in the set.
-A
-.B ]
-may be matched by including it as the first character
-in the set.
-.br
-.if t .sp 0.5
-.if n .sp 1
-Within
-.B [
-and
-.BR ] ,
-\fIcharacter classes\fP can be specified using the syntax
-\fB[:\fP\fIclass\fP\fB:]\fP, where \fIclass\fP is one of the
-following classes defined in the POSIX standard:
-.PP
-.RS
-.B
-.if n alnum alpha ascii blank cntrl digit graph lower print punct space upper word xdigit
-.if t alnum alpha ascii blank cntrl digit graph lower print punct space upper word xdigit
-.br
-A character class matches any character belonging to that class.
-The \fBword\fP character class matches letters, digits, and the character _.
-.br
-.if t .sp 0.5
-.if n .sp 1
-Within
-.B [
-and
-.BR ] ,
-an \fIequivalence class\fP can be specified using the syntax
-\fB[=\fP\fIc\fP\fB=]\fP, which matches all characters with the
-same collation weight (as defined by the current locale) as
-the character \fIc\fP.
-.br
-.if t .sp 0.5
-.if n .sp 1
-Within
-.B [
-and
-.BR ] ,
-the syntax \fB[.\fP\fIsymbol\fP\fB.]\fP matches the collating symbol
-\fIsymbol\fP.
-.RE
-.RE
-.PD
-.PP
-If the \fBextglob\fP shell option is enabled using the \fBshopt\fP
-builtin, several extended pattern matching operators are recognized.
-In the following description, a \fIpattern-list\fP is a list of one
-or more patterns separated by a \fB|\fP.
-Composite patterns may be formed using one or more of the following
-sub-patterns:
-.sp 1
-.PD 0
-.RS
-.TP
-\fB?(\fP\^\fIpattern-list\^\fP\fB)\fP
-Matches zero or one occurrence of the given patterns
-.TP
-\fB*(\fP\^\fIpattern-list\^\fP\fB)\fP
-Matches zero or more occurrences of the given patterns
-.TP
-\fB+(\fP\^\fIpattern-list\^\fP\fB)\fP
-Matches one or more occurrences of the given patterns
-.TP
-\fB@(\fP\^\fIpattern-list\^\fP\fB)\fP
-Matches one of the given patterns
-.TP
-\fB!(\fP\^\fIpattern-list\^\fP\fB)\fP
-Matches anything except one of the given patterns
-.RE
-.PD
-.SS Quote Removal
-.PP
-After the preceding expansions, all unquoted occurrences of the
-characters
-.BR \e ,
-.BR \(aq ,
-and \^\f3"\fP\^ that did not result from one of the above
-expansions are removed.
-.SH REDIRECTION
-Before a command is executed, its input and output
-may be
-.I redirected
-using a special notation interpreted by the shell.
-Redirection may also be used to open and close files for the
-current shell execution environment. The following redirection
-operators may precede or appear anywhere within a
-.I simple command
-or may follow a
-.IR command .
-Redirections are processed in the order they appear, from
-left to right.
-.PP
-Each redirection that may be preceded by a file descriptor number
-may instead be preceded by a word of the form {\fIvarname\fP}.
-In this case, for each redirection operator except
->&- and <&-, the shell will allocate a file descriptor greater
-than 10 and assign it to \fIvarname\fP. If >&- or <&- is preceded
-by {\fIvarname\fP}, the value of \fIvarname\fP defines the file
-descriptor to close.
-.PP
-In the following descriptions, if the file descriptor number is
-omitted, and the first character of the redirection operator is
-.BR < ,
-the redirection refers to the standard input (file descriptor
-0). If the first character of the redirection operator is
-.BR > ,
-the redirection refers to the standard output (file descriptor
-1).
-.PP
-The word following the redirection operator in the following
-descriptions, unless otherwise noted, is subjected to brace expansion,
-tilde expansion, parameter expansion, command substitution, arithmetic
-expansion, quote removal, pathname expansion, and word splitting.
-If it expands to more than one word,
-.B bash
-reports an error.
-.PP
-Note that the order of redirections is significant. For example,
-the command
-.RS
-.PP
-ls \fB>\fP dirlist 2\fB>&\fP1
-.RE
-.PP
-directs both standard output and standard error to the file
-.IR dirlist ,
-while the command
-.RS
-.PP
-ls 2\fB>&\fP1 \fB>\fP dirlist
-.RE
-.PP
-directs only the standard output to file
-.IR dirlist ,
-because the standard error was duplicated from the standard output
-before the standard output was redirected to
-.IR dirlist .
-.PP
-\fBBash\fP handles several filenames specially when they are used in
-redirections, as described in the following table:
-.RS
-.PP
-.PD 0
-.TP
-.B /dev/fd/\fIfd\fP
-If \fIfd\fP is a valid integer, file descriptor \fIfd\fP is duplicated.
-.TP
-.B /dev/stdin
-File descriptor 0 is duplicated.
-.TP
-.B /dev/stdout
-File descriptor 1 is duplicated.
-.TP
-.B /dev/stderr
-File descriptor 2 is duplicated.
-.TP
-.B /dev/tcp/\fIhost\fP/\fIport\fP
-If \fIhost\fP is a valid hostname or Internet address, and \fIport\fP
-is an integer port number or service name, \fBbash\fP attempts to open
-a TCP connection to the corresponding socket.
-.TP
-.B /dev/udp/\fIhost\fP/\fIport\fP
-If \fIhost\fP is a valid hostname or Internet address, and \fIport\fP
-is an integer port number or service name, \fBbash\fP attempts to open
-a UDP connection to the corresponding socket.
-.PD
-.RE
-.PP
-A failure to open or create a file causes the redirection to fail.
-.PP
-Redirections using file descriptors greater than 9 should be used with
-care, as they may conflict with file descriptors the shell uses
-internally.
-.SS Redirecting Input
-.PP
-Redirection of input causes the file whose name results from
-the expansion of
-.I word
-to be opened for reading on file descriptor
-.IR n ,
-or the standard input (file descriptor 0) if
-.I n
-is not specified.
-.PP
-The general format for redirecting input is:
-.RS
-.PP
-[\fIn\fP]\fB<\fP\fIword\fP
-.RE
-.SS Redirecting Output
-.PP
-Redirection of output causes the file whose name results from
-the expansion of
-.I word
-to be opened for writing on file descriptor
-.IR n ,
-or the standard output (file descriptor 1) if
-.I n
-is not specified. If the file does not exist it is created;
-if it does exist it is truncated to zero size.
-.PP
-The general format for redirecting output is:
-.RS
-.PP
-[\fIn\fP]\fB>\fP\fIword\fP
-.RE
-.PP
-If the redirection operator is
-.BR > ,
-and the
-.B noclobber
-option to the
-.B set
-builtin has been enabled, the redirection will fail if the file
-whose name results from the expansion of \fIword\fP exists and is
-a regular file.
-If the redirection operator is
-.BR >| ,
-or the redirection operator is
-.B >
-and the
-.B noclobber
-option to the
-.B set
-builtin command is not enabled, the redirection is attempted even
-if the file named by \fIword\fP exists.
-.SS Appending Redirected Output
-.PP
-Redirection of output in this fashion
-causes the file whose name results from
-the expansion of
-.I word
-to be opened for appending on file descriptor
-.IR n ,
-or the standard output (file descriptor 1) if
-.I n
-is not specified. If the file does not exist it is created.
-.PP
-The general format for appending output is:
-.RS
-.PP
-[\fIn\fP]\fB>>\fP\fIword\fP
-.RE
-.PP
-.SS Redirecting Standard Output and Standard Error
-.PP
-This construct allows both the
-standard output (file descriptor 1) and
-the standard error output (file descriptor 2)
-to be redirected to the file whose name is the
-expansion of
-.IR word .
-.PP
-There are two formats for redirecting standard output and
-standard error:
-.RS
-.PP
-\fB&>\fP\fIword\fP
-.RE
-and
-.RS
-\fB>&\fP\fIword\fP
-.RE
-.PP
-Of the two forms, the first is preferred.
-This is semantically equivalent to
-.RS
-.PP
-\fB>\fP\fIword\fP 2\fB>&\fP1
-.RE
-.PP
-(see \fBDuplicating File Descriptors\fP below).
-.SS Appending Standard Output and Standard Error
-.PP
-This construct allows both the
-standard output (file descriptor 1) and
-the standard error output (file descriptor 2)
-to be appended to the file whose name is the
-expansion of
-.IR word .
-.PP
-The format for appending standard output and standard error is:
-.RS
-.PP
-\fB&>>\fP\fIword\fP
-.RE
-.PP
-This is semantically equivalent to
-.RS
-.PP
-\fB>>\fP\fIword\fP 2\fB>&\fP1
-.RE
-.PP
-(see \fBDuplicating File Descriptors\fP below).
-.SS Here Documents
-.PP
-This type of redirection instructs the shell to read input from the
-current source until a line containing only
-.I delimiter
-(with no trailing blanks)
-is seen. All of
-the lines read up to that point are then used as the standard
-input for a command.
-.PP
-The format of here-documents is:
-.RS
-.PP
-.nf
-\fB<<\fP[\fB\-\fP]\fIword\fP
- \fIhere-document\fP
-\fIdelimiter\fP
-.fi
-.RE
-.PP
-No parameter expansion, command substitution, arithmetic expansion,
-or pathname expansion is performed on
-.IR word .
-If any characters in
-.I word
-are quoted, the
-.I delimiter
-is the result of quote removal on
-.IR word ,
-and the lines in the here-document are not expanded.
-If \fIword\fP is unquoted,
-all lines of the here-document are subjected to parameter expansion,
-command substitution, and arithmetic expansion. In the latter
-case, the character sequence
-.B \e<newline>
-is ignored, and
-.B \e
-must be used to quote the characters
-.BR \e ,
-.BR $ ,
-and
-.BR \` .
-.PP
-If the redirection operator is
-.BR <<\- ,
-then all leading tab characters are stripped from input lines and the
-line containing
-.IR delimiter .
-This allows
-here-documents within shell scripts to be indented in a
-natural fashion.
-.SS "Here Strings"
-A variant of here documents, the format is:
-.RS
-.PP
-.nf
-\fB<<<\fP\fIword\fP
-.fi
-.RE
-.PP
-The \fIword\fP
-is expanded as described above, with the exception that
-pathname expansion is not applied, and supplied as a single string
-to the command on its standard input.
-.SS "Duplicating File Descriptors"
-.PP
-The redirection operator
-.RS
-.PP
-[\fIn\fP]\fB<&\fP\fIword\fP
-.RE
-.PP
-is used to duplicate input file descriptors.
-If
-.I word
-expands to one or more digits, the file descriptor denoted by
-.I n
-is made to be a copy of that file descriptor.
-If the digits in
-.I word
-do not specify a file descriptor open for input, a redirection error occurs.
-If
-.I word
-evaluates to
-.BR \- ,
-file descriptor
-.I n
-is closed. If
-.I n
-is not specified, the standard input (file descriptor 0) is used.
-.PP
-The operator
-.RS
-.PP
-[\fIn\fP]\fB>&\fP\fIword\fP
-.RE
-.PP
-is used similarly to duplicate output file descriptors. If
-.I n
-is not specified, the standard output (file descriptor 1) is used.
-If the digits in
-.I word
-do not specify a file descriptor open for output, a redirection error occurs.
-As a special case, if \fIn\fP is omitted, and \fIword\fP does not
-expand to one or more digits, the standard output and standard
-error are redirected as described previously.
-.SS "Moving File Descriptors"
-.PP
-The redirection operator
-.RS
-.PP
-[\fIn\fP]\fB<&\fP\fIdigit\fP\fB\-\fP
-.RE
-.PP
-moves the file descriptor \fIdigit\fP to file descriptor
-.IR n ,
-or the standard input (file descriptor 0) if \fIn\fP is not specified.
-\fIdigit\fP is closed after being duplicated to \fIn\fP.
-.PP
-Similarly, the redirection operator
-.RS
-.PP
-[\fIn\fP]\fB>&\fP\fIdigit\fP\fB\-\fP
-.RE
-.PP
-moves the file descriptor \fIdigit\fP to file descriptor
-.IR n ,
-or the standard output (file descriptor 1) if \fIn\fP is not specified.
-.SS "Opening File Descriptors for Reading and Writing"
-.PP
-The redirection operator
-.RS
-.PP
-[\fIn\fP]\fB<>\fP\fIword\fP
-.RE
-.PP
-causes the file whose name is the expansion of
-.I word
-to be opened for both reading and writing on file descriptor
-.IR n ,
-or on file descriptor 0 if
-.I n
-is not specified. If the file does not exist, it is created.
-.SH ALIASES
-\fIAliases\fP allow a string to be substituted for a word when it is used
-as the first word of a simple command.
-The shell maintains a list of aliases that may be set and unset with the
-.B alias
-and
-.B unalias
-builtin commands (see
-.SM
-.B SHELL BUILTIN COMMANDS
-below).
-The first word of each simple command, if unquoted,
-is checked to see if it has an
-alias. If so, that word is replaced by the text of the alias.
-The characters \fB/\fP, \fB$\fP, \fB\`\fP, and \fB=\fP and
-any of the shell \fImetacharacters\fP or quoting characters
-listed above may not appear in an alias name.
-The replacement text may contain any valid shell input,
-including shell metacharacters.
-The first word of the replacement text is tested
-for aliases, but a word that is identical to an alias being expanded
-is not expanded a second time.
-This means that one may alias
-.B ls
-to
-.BR "ls \-F" ,
-for instance, and
-.B bash
-does not try to recursively expand the replacement text.
-If the last character of the alias value is a
-.IR blank ,
-then the next command
-word following the alias is also checked for alias expansion.
-.PP
-Aliases are created and listed with the
-.B alias
-command, and removed with the
-.B unalias
-command.
-.PP
-There is no mechanism for using arguments in the replacement text.
-If arguments are needed, a shell function should be used (see
-.SM
-.B FUNCTIONS
-below).
-.PP
-Aliases are not expanded when the shell is not interactive, unless
-the
-.B expand_aliases
-shell option is set using
-.B shopt
-(see the description of
-.B shopt
-under
-.SM
-\fBSHELL BUILTIN COMMANDS\fP
-below).
-.PP
-The rules concerning the definition and use of aliases are
-somewhat confusing.
-.B Bash
-always reads at least one complete line
-of input before executing any
-of the commands on that line. Aliases are expanded when a
-command is read, not when it is executed. Therefore, an
-alias definition appearing on the same line as another
-command does not take effect until the next line of input is read.
-The commands following the alias definition
-on that line are not affected by the new alias.
-This behavior is also an issue when functions are executed.
-Aliases are expanded when a function definition is read,
-not when the function is executed, because a function definition
-is itself a compound command. As a consequence, aliases
-defined in a function are not available until after that
-function is executed. To be safe, always put
-alias definitions on a separate line, and do not use
-.B alias
-in compound commands.
-.PP
-For almost every purpose, aliases are superseded by
-shell functions.
-.SH FUNCTIONS
-A shell function, defined as described above under
-.SM
-.BR "SHELL GRAMMAR" ,
-stores a series of commands for later execution.
-When the name of a shell function is used as a simple command name,
-the list of commands associated with that function name is executed.
-Functions are executed in the context of the
-current shell; no new process is created to interpret
-them (contrast this with the execution of a shell script).
-When a function is executed, the arguments to the
-function become the positional parameters
-during its execution.
-The special parameter
-.B #
-is updated to reflect the change. Special parameter \fB0\fP
-is unchanged.
-The first element of the
-.SM
-.B FUNCNAME
-variable is set to the name of the function while the function
-is executing.
-.PP
-All other aspects of the shell execution
-environment are identical between a function and its caller
-with these exceptions: the
-.SM
-.B DEBUG
-and
-.B RETURN
-traps (see the description of the
-.B trap
-builtin under
-.SM
-.B SHELL BUILTIN COMMANDS
-below) are not inherited unless the function has been given the
-\fBtrace\fP attribute (see the description of the
-.SM
-.B declare
-builtin below) or the
-\fB\-o functrace\fP shell option has been enabled with
-the \fBset\fP builtin
-(in which case all functions inherit the \fBDEBUG\fP and \fBRETURN\fP traps),
-and the
-.SM
-.B ERR
-trap is not inherited unless the \fB\-o errtrace\fP shell option has
-been enabled.
-.PP
-Variables local to the function may be declared with the
-.B local
-builtin command. Ordinarily, variables and their values
-are shared between the function and its caller.
-.PP
-The \fBFUNCNEST\fP variable, if set to a numeric value greater
-than 0, defines a maximum function nesting level. Function
-invocations that exceed the limit cause the entire command to
-abort.
-.PP
-If the builtin command
-.B return
-is executed in a function, the function completes and
-execution resumes with the next command after the function
-call.
-Any command associated with the \fBRETURN\fP trap is executed
-before execution resumes.
-When a function completes, the values of the
-positional parameters and the special parameter
-.B #
-are restored to the values they had prior to the function's
-execution.
-.PP
-Function names and definitions may be listed with the
-.B \-f
-option to the
-.B declare
-or
-.B typeset
-builtin commands. The
-.B \-F
-option to
-.B declare
-or
-.B typeset
-will list the function names only
-(and optionally the source file and line number, if the \fBextdebug\fP
-shell option is enabled).
-Functions may be exported so that subshells
-automatically have them defined with the
-.B \-f
-option to the
-.B export
-builtin.
-A function definition may be deleted using the \fB\-f\fP option to
-the
-.B unset
-builtin.
-Note that shell functions and variables with the same name may result
-in multiple identically-named entries in the environment passed to the
-shell's children.
-Care should be taken in cases where this may cause a problem.
-.PP
-Functions may be recursive.
-The \fBFUNCNEST\fP variable may be used to limit the depth of the
-function call stack and restrict the number of function invocations.
-By default, no limit is imposed on the number of recursive calls.
-.SH "ARITHMETIC EVALUATION"
-The shell allows arithmetic expressions to be evaluated, under
-certain circumstances (see the \fBlet\fP and \fBdeclare\fP builtin
-commands and \fBArithmetic Expansion\fP).
-Evaluation is done in fixed-width integers with no check for overflow,
-though division by 0 is trapped and flagged as an error.
-The operators and their precedence, associativity, and values
-are the same as in the C language.
-The following list of operators is grouped into levels of
-equal-precedence operators.
-The levels are listed in order of decreasing precedence.
-.PP
-.PD 0
-.TP
-.B \fIid\fP++ \fIid\fP\-\-
-variable post-increment and post-decrement
-.TP
-.B ++\fIid\fP \-\-\fIid\fP
-variable pre-increment and pre-decrement
-.TP
-.B \- +
-unary minus and plus
-.TP
-.B ! ~
-logical and bitwise negation
-.TP
-.B **
-exponentiation
-.TP
-.B * / %
-multiplication, division, remainder
-.TP
-.B + \-
-addition, subtraction
-.TP
-.B << >>
-left and right bitwise shifts
-.TP
-.B <= >= < >
-comparison
-.TP
-.B == !=
-equality and inequality
-.TP
-.B &
-bitwise AND
-.TP
-.B ^
-bitwise exclusive OR
-.TP
-.B |
-bitwise OR
-.TP
-.B &&
-logical AND
-.TP
-.B ||
-logical OR
-.TP
-.B \fIexpr\fP?\fIexpr\fP:\fIexpr\fP
-conditional operator
-.TP
-.B = *= /= %= += \-= <<= >>= &= ^= |=
-assignment
-.TP
-.B \fIexpr1\fP , \fIexpr2\fP
-comma
-.PD
-.PP
-Shell variables are allowed as operands; parameter expansion is
-performed before the expression is evaluated.
-Within an expression, shell variables may also be referenced by name
-without using the parameter expansion syntax.
-A shell variable that is null or unset evaluates to 0 when referenced
-by name without using the parameter expansion syntax.
-The value of a variable is evaluated as an arithmetic expression
-when it is referenced, or when a variable which has been given the
-\fIinteger\fP attribute using \fBdeclare -i\fP is assigned a value.
-A null value evaluates to 0.
-A shell variable need not have its \fIinteger\fP attribute
-turned on to be used in an expression.
-.PP
-Constants with a leading 0 are interpreted as octal numbers.
-A leading 0x or 0X denotes hexadecimal.
-Otherwise, numbers take the form [\fIbase#\fP]n, where the optional \fIbase\fP
-is a decimal number between 2 and 64 representing the arithmetic
-base, and \fIn\fP is a number in that base.
-If \fIbase#\fP is omitted, then base 10 is used.
-The digits greater than 9 are represented by the lowercase letters,
-the uppercase letters, @, and _, in that order.
-If \fIbase\fP is less than or equal to 36, lowercase and uppercase
-letters may be used interchangeably to represent numbers between 10
-and 35.
-.PP
-Operators are evaluated in order of precedence. Sub-expressions in
-parentheses are evaluated first and may override the precedence
-rules above.
-.SH "CONDITIONAL EXPRESSIONS"
-Conditional expressions are used by the \fB[[\fP compound command and
-the \fBtest\fP and \fB[\fP builtin commands to test file attributes
-and perform string and arithmetic comparisons.
-Expressions are formed from the following unary or binary primaries.
-If any \fIfile\fP argument to one of the primaries is of the form
-\fI/dev/fd/n\fP, then file descriptor \fIn\fP is checked.
-If the \fIfile\fP argument to one of the primaries is one of
-\fI/dev/stdin\fP, \fI/dev/stdout\fP, or \fI/dev/stderr\fP, file
-descriptor 0, 1, or 2, respectively, is checked.
-.PP
-Unless otherwise specified, primaries that operate on files follow symbolic
-links and operate on the target of the link, rather than the link itself.
-.if t .sp 0.5
-.if n .sp 1
-When used with \fB[[\fP, the \fB<\fP and \fB>\fP operators sort
-lexicographically using the current locale.
-The \fBtest\fP command sorts using ASCII ordering.
-.sp 1
-.PD 0
-.TP
-.B \-a \fIfile\fP
-True if \fIfile\fP exists.
-.TP
-.B \-b \fIfile\fP
-True if \fIfile\fP exists and is a block special file.
-.TP
-.B \-c \fIfile\fP
-True if \fIfile\fP exists and is a character special file.
-.TP
-.B \-d \fIfile\fP
-True if \fIfile\fP exists and is a directory.
-.TP
-.B \-e \fIfile\fP
-True if \fIfile\fP exists.
-.TP
-.B \-f \fIfile\fP
-True if \fIfile\fP exists and is a regular file.
-.TP
-.B \-g \fIfile\fP
-True if \fIfile\fP exists and is set-group-id.
-.TP
-.B \-h \fIfile\fP
-True if \fIfile\fP exists and is a symbolic link.
-.TP
-.B \-k \fIfile\fP
-True if \fIfile\fP exists and its ``sticky'' bit is set.
-.TP
-.B \-p \fIfile\fP
-True if \fIfile\fP exists and is a named pipe (FIFO).
-.TP
-.B \-r \fIfile\fP
-True if \fIfile\fP exists and is readable.
-.TP
-.B \-s \fIfile\fP
-True if \fIfile\fP exists and has a size greater than zero.
-.TP
-.B \-t \fIfd\fP
-True if file descriptor
-.I fd
-is open and refers to a terminal.
-.TP
-.B \-u \fIfile\fP
-True if \fIfile\fP exists and its set-user-id bit is set.
-.TP
-.B \-w \fIfile\fP
-True if \fIfile\fP exists and is writable.
-.TP
-.B \-x \fIfile\fP
-True if \fIfile\fP exists and is executable.
-.TP
-.B \-G \fIfile\fP
-True if \fIfile\fP exists and is owned by the effective group id.
-.TP
-.B \-L \fIfile\fP
-True if \fIfile\fP exists and is a symbolic link.
-.TP
-.B \-N \fIfile\fP
-True if \fIfile\fP exists and has been modified since it was last read.
-.TP
-.B \-O \fIfile\fP
-True if \fIfile\fP exists and is owned by the effective user id.
-.TP
-.B \-S \fIfile\fP
-True if \fIfile\fP exists and is a socket.
-.TP
-\fIfile1\fP \fB\-ef\fP \fIfile2\fP
-True if \fIfile1\fP and \fIfile2\fP refer to the same device and
-inode numbers.
-.TP
-\fIfile1\fP \-\fBnt\fP \fIfile2\fP
-True if \fIfile1\fP is newer (according to modification date) than \fIfile2\fP,
-or if \fIfile1\fP exists and \fPfile2\fP does not.
-.TP
-\fIfile1\fP \-\fBot\fP \fIfile2\fP
-True if \fIfile1\fP is older than \fIfile2\fP, or if \fIfile2\fP exists
-and \fIfile1\fP does not.
-.TP
-.B \-o \fIoptname\fP
-True if the shell option
-.I optname
-is enabled.
-See the list of options under the description of the
-.B \-o
-option to the
-.B set
-builtin below.
-.TP
-.B \-v \fIvarname\fP
-True if the shell variable
-.I varname
-is set (has been assigned a value).
-.TP
-.B \-z \fIstring\fP
-True if the length of \fIstring\fP is zero.
-.TP
-\fIstring\fP
-.PD 0
-.TP
-.B \-n \fIstring\fP
-.PD
-True if the length of
-.I string
-is non-zero.
-.TP
-\fIstring1\fP \fB==\fP \fIstring2\fP
-.PD 0
-.TP
-\fIstring1\fP \fB=\fP \fIstring2\fP
-.PD
-True if the strings are equal. \fB=\fP should be used
-with the \fBtest\fP command for POSIX conformance.
-.TP
-\fIstring1\fP \fB!=\fP \fIstring2\fP
-True if the strings are not equal.
-.TP
-\fIstring1\fP \fB<\fP \fIstring2\fP
-True if \fIstring1\fP sorts before \fIstring2\fP lexicographically.
-.TP
-\fIstring1\fP \fB>\fP \fIstring2\fP
-True if \fIstring1\fP sorts after \fIstring2\fP lexicographically.
-.TP
-.I \fIarg1\fP \fBOP\fP \fIarg2\fP
-.SM
-.B OP
-is one of
-.BR \-eq ,
-.BR \-ne ,
-.BR \-lt ,
-.BR \-le ,
-.BR \-gt ,
-or
-.BR \-ge .
-These arithmetic binary operators return true if \fIarg1\fP
-is equal to, not equal to, less than, less than or equal to,
-greater than, or greater than or equal to \fIarg2\fP, respectively.
-.I Arg1
-and
-.I arg2
-may be positive or negative integers.
-.PD
-.SH "SIMPLE COMMAND EXPANSION"
-When a simple command is executed, the shell performs the following
-expansions, assignments, and redirections, from left to right.
-.IP 1.
-The words that the parser has marked as variable assignments (those
-preceding the command name) and redirections are saved for later
-processing.
-.IP 2.
-The words that are not variable assignments or redirections are
-expanded. If any words remain after expansion, the first word
-is taken to be the name of the command and the remaining words are
-the arguments.
-.IP 3.
-Redirections are performed as described above under
-.SM
-.BR REDIRECTION .
-.IP 4.
-The text after the \fB=\fP in each variable assignment undergoes tilde
-expansion, parameter expansion, command substitution, arithmetic expansion,
-and quote removal before being assigned to the variable.
-.PP
-If no command name results, the variable assignments affect the current
-shell environment. Otherwise, the variables are added to the environment
-of the executed command and do not affect the current shell environment.
-If any of the assignments attempts to assign a value to a readonly variable,
-an error occurs, and the command exits with a non-zero status.
-.PP
-If no command name results, redirections are performed, but do not
-affect the current shell environment. A redirection error causes the
-command to exit with a non-zero status.
-.PP
-If there is a command name left after expansion, execution proceeds as
-described below. Otherwise, the command exits. If one of the expansions
-contained a command substitution, the exit status of the command is
-the exit status of the last command substitution performed. If there
-were no command substitutions, the command exits with a status of zero.
-.SH "COMMAND EXECUTION"
-After a command has been split into words, if it results in a
-simple command and an optional list of arguments, the following
-actions are taken.
-.PP
-If the command name contains no slashes, the shell attempts to
-locate it. If there exists a shell function by that name, that
-function is invoked as described above in
-.SM
-.BR FUNCTIONS .
-If the name does not match a function, the shell searches for
-it in the list of shell builtins. If a match is found, that
-builtin is invoked.
-.PP
-If the name is neither a shell function nor a builtin,
-and contains no slashes,
-.B bash
-searches each element of the
-.SM
-.B PATH
-for a directory containing an executable file by that name.
-.B Bash
-uses a hash table to remember the full pathnames of executable
-files (see
-.B hash
-under
-.SM
-.B "SHELL BUILTIN COMMANDS"
-below).
-A full search of the directories in
-.SM
-.B PATH
-is performed only if the command is not found in the hash table.
-If the search is unsuccessful, the shell searches for a defined shell
-function named \fBcommand_not_found_handle\fP.
-If that function exists, it is invoked with the original command and
-the original command's arguments as its arguments, and the function's
-exit status becomes the exit status of the shell.
-If that function is not defined, the shell prints an error
-message and returns an exit status of 127.
-.PP
-If the search is successful, or if the command name contains
-one or more slashes, the shell executes the named program in a
-separate execution environment.
-Argument 0 is set to the name given, and the remaining arguments
-to the command are set to the arguments given, if any.
-.PP
-If this execution fails because the file is not in executable
-format, and the file is not a directory, it is assumed to be
-a \fIshell script\fP, a file
-containing shell commands. A subshell is spawned to execute
-it. This subshell reinitializes itself, so
-that the effect is as if a new shell had been invoked
-to handle the script, with the exception that the locations of
-commands remembered by the parent (see
-.B hash
-below under
-.SM
-\fBSHELL BUILTIN COMMANDS\fP)
-are retained by the child.
-.PP
-If the program is a file beginning with
-.BR #! ,
-the remainder of the first line specifies an interpreter
-for the program. The shell executes the
-specified interpreter on operating systems that do not
-handle this executable format themselves. The arguments to the
-interpreter consist of a single optional argument following the
-interpreter name on the first line of the program, followed
-by the name of the program, followed by the command
-arguments, if any.
-.SH COMMAND EXECUTION ENVIRONMENT
-The shell has an \fIexecution environment\fP, which consists of the
-following:
-.IP \(bu
-open files inherited by the shell at invocation, as modified by
-redirections supplied to the \fBexec\fP builtin
-.IP \(bu
-the current working directory as set by \fBcd\fP, \fBpushd\fP, or
-\fBpopd\fP, or inherited by the shell at invocation
-.IP \(bu
-the file creation mode mask as set by \fBumask\fP or inherited from
-the shell's parent
-.IP \(bu
-current traps set by \fBtrap\fP
-.IP \(bu
-shell parameters that are set by variable assignment or with \fBset\fP
-or inherited from the shell's parent in the environment
-.IP \(bu
-shell functions defined during execution or inherited from the shell's
-parent in the environment
-.IP \(bu
-options enabled at invocation (either by default or with command-line
-arguments) or by \fBset\fP
-.IP \(bu
-options enabled by \fBshopt\fP
-.IP \(bu
-shell aliases defined with \fBalias\fP
-.IP \(bu
-various process IDs, including those of background jobs, the value
-of \fB$$\fP, and the value of
-.SM
-.B PPID
-.PP
-When a simple command other than a builtin or shell function
-is to be executed, it
-is invoked in a separate execution environment that consists of
-the following. Unless otherwise noted, the values are inherited
-from the shell.
-.if n .sp 1
-.IP \(bu
-the shell's open files, plus any modifications and additions specified
-by redirections to the command
-.IP \(bu
-the current working directory
-.IP \(bu
-the file creation mode mask
-.IP \(bu
-shell variables and functions marked for export, along with variables
-exported for the command, passed in the environment
-.IP \(bu
-traps caught by the shell are reset to the values inherited from the
-shell's parent, and traps ignored by the shell are ignored
-.PP
-A command invoked in this separate environment cannot affect the
-shell's execution environment.
-.PP
-Command substitution, commands grouped with parentheses,
-and asynchronous commands are invoked in a
-subshell environment that is a duplicate of the shell environment,
-except that traps caught by the shell are reset to the values
-that the shell inherited from its parent at invocation. Builtin
-commands that are invoked as part of a pipeline are also executed in a
-subshell environment. Changes made to the subshell environment
-cannot affect the shell's execution environment.
-.PP
-Subshells spawned to execute command substitutions inherit the value of
-the \fB\-e\fP option from the parent shell. When not in \fIposix\fP mode,
-\fBbash\fP clears the \fB\-e\fP option in such subshells.
-.PP
-If a command is followed by a \fB&\fP and job control is not active, the
-default standard input for the command is the empty file \fI/dev/null\fP.
-Otherwise, the invoked command inherits the file descriptors of the calling
-shell as modified by redirections.
-.SH ENVIRONMENT
-When a program is invoked it is given an array of strings
-called the
-.IR environment .
-This is a list of
-\fIname\fP\-\fIvalue\fP pairs, of the form
-.IR "name\fR=\fPvalue" .
-.PP
-The shell provides several ways to manipulate the environment.
-On invocation, the shell scans its own environment and
-creates a parameter for each name found, automatically marking
-it for
-.I export
-to child processes. Executed commands inherit the environment.
-The
-.B export
-and
-.B declare \-x
-commands allow parameters and functions to be added to and
-deleted from the environment. If the value of a parameter
-in the environment is modified, the new value becomes part
-of the environment, replacing the old. The environment
-inherited by any executed command consists of the shell's
-initial environment, whose values may be modified in the shell,
-less any pairs removed by the
-.B unset
-command, plus any additions via the
-.B export
-and
-.B declare \-x
-commands.
-.PP
-The environment for any
-.I simple command
-or function may be augmented temporarily by prefixing it with
-parameter assignments, as described above in
-.SM
-.BR PARAMETERS .
-These assignment statements affect only the environment seen
-by that command.
-.PP
-If the
-.B \-k
-option is set (see the
-.B set
-builtin command below), then
-.I all
-parameter assignments are placed in the environment for a command,
-not just those that precede the command name.
-.PP
-When
-.B bash
-invokes an external command, the variable
-.B _
-is set to the full file name of the command and passed to that
-command in its environment.
-.SH "EXIT STATUS"
-.PP
-The exit status of an executed command is the value returned by the
-\fIwaitpid\fP system call or equivalent function. Exit statuses
-fall between 0 and 255, though, as explained below, the shell may
-use values above 125 specially. Exit statuses from shell builtins and
-compound commands are also limited to this range. Under certain
-circumstances, the shell will use special values to indicate specific
-failure modes.
-.PP
-For the shell's purposes, a command which exits with a
-zero exit status has succeeded. An exit status of zero
-indicates success. A non-zero exit status indicates failure.
-When a command terminates on a fatal signal \fIN\fP, \fBbash\fP uses
-the value of 128+\fIN\fP as the exit status.
-.PP
-If a command is not found, the child process created to
-execute it returns a status of 127. If a command is found
-but is not executable, the return status is 126.
-.PP
-If a command fails because of an error during expansion or redirection,
-the exit status is greater than zero.
-.PP
-Shell builtin commands return a status of 0 (\fItrue\fP) if
-successful, and non-zero (\fIfalse\fP) if an error occurs
-while they execute.
-All builtins return an exit status of 2 to indicate incorrect usage.
-.PP
-\fBBash\fP itself returns the exit status of the last command
-executed, unless a syntax error occurs, in which case it exits
-with a non-zero value. See also the \fBexit\fP builtin
-command below.
-.SH SIGNALS
-When \fBbash\fP is interactive, in the absence of any traps, it ignores
-.SM
-.B SIGTERM
-(so that \fBkill 0\fP does not kill an interactive shell),
-and
-.SM
-.B SIGINT
-is caught and handled (so that the \fBwait\fP builtin is interruptible).
-In all cases, \fBbash\fP ignores
-.SM
-.BR SIGQUIT .
-If job control is in effect,
-.B bash
-ignores
-.SM
-.BR SIGTTIN ,
-.SM
-.BR SIGTTOU ,
-and
-.SM
-.BR SIGTSTP .
-.PP
-Non-builtin commands run by \fBbash\fP have signal handlers
-set to the values inherited by the shell from its parent.
-When job control is not in effect, asynchronous commands
-ignore
-.SM
-.B SIGINT
-and
-.SM
-.B SIGQUIT
-in addition to these inherited handlers.
-Commands run as a result of command substitution ignore the
-keyboard-generated job control signals
-.SM
-.BR SIGTTIN ,
-.SM
-.BR SIGTTOU ,
-and
-.SM
-.BR SIGTSTP .
-.PP
-The shell exits by default upon receipt of a
-.SM
-.BR SIGHUP .
-Before exiting, an interactive shell resends the
-.SM
-.B SIGHUP
-to all jobs, running or stopped.
-Stopped jobs are sent
-.SM
-.B SIGCONT
-to ensure that they receive the
-.SM
-.BR SIGHUP .
-To prevent the shell from
-sending the signal to a particular job, it should be removed from the
-jobs table with the
-.B disown
-builtin (see
-.SM
-.B "SHELL BUILTIN COMMANDS"
-below) or marked
-to not receive
-.SM
-.B SIGHUP
-using
-.BR "disown \-h" .
-.PP
-If the
-.B huponexit
-shell option has been set with
-.BR shopt ,
-.B bash
-sends a
-.SM
-.B SIGHUP
-to all jobs when an interactive login shell exits.
-.PP
-If \fBbash\fP is waiting for a command to complete and receives a signal
-for which a trap has been set, the trap will not be executed until
-the command completes.
-When \fBbash\fP is waiting for an asynchronous command via the \fBwait\fP
-builtin, the reception of a signal for which a trap has been set will
-cause the \fBwait\fP builtin to return immediately with an exit status
-greater than 128, immediately after which the trap is executed.
-.SH "JOB CONTROL"
-.I Job control
-refers to the ability to selectively stop (\fIsuspend\fP)
-the execution of processes and continue (\fIresume\fP)
-their execution at a later point. A user typically employs
-this facility via an interactive interface supplied jointly
-by the operating system kernel's terminal driver and
-.BR bash .
-.PP
-The shell associates a
-.I job
-with each pipeline. It keeps a table of currently executing
-jobs, which may be listed with the
-.B jobs
-command. When
-.B bash
-starts a job asynchronously (in the
-.IR background ),
-it prints a line that looks like:
-.RS
-.PP
-[1] 25647
-.RE
-.PP
-indicating that this job is job number 1 and that the process ID
-of the last process in the pipeline associated with this job is 25647.
-All of the processes in a single pipeline are members of the same job.
-.B Bash
-uses the
-.I job
-abstraction as the basis for job control.
-.PP
-To facilitate the implementation of the user interface to job
-control, the operating system maintains the notion of a \fIcurrent terminal
-process group ID\fP. Members of this process group (processes whose
-process group ID is equal to the current terminal process group ID)
-receive keyboard-generated signals such as
-.SM
-.BR SIGINT .
-These processes are said to be in the
-.IR foreground .
-.I Background
-processes are those whose process group ID differs from the terminal's;
-such processes are immune to keyboard-generated signals.
-Only foreground processes are allowed to read from or, if the
-user so specifies with \f(CWstty tostop\fP, write to the
-terminal.
-Background processes which attempt to read from (write to when
-\f(CWstty tostop\fP is in effect) the
-terminal are sent a
-.SM
-.B SIGTTIN (SIGTTOU)
-signal by the kernel's terminal driver,
-which, unless caught, suspends the process.
-.PP
-If the operating system on which
-.B bash
-is running supports
-job control,
-.B bash
-contains facilities to use it.
-Typing the
-.I suspend
-character (typically
-.BR ^Z ,
-Control-Z) while a process is running
-causes that process to be stopped and returns control to
-.BR bash .
-Typing the
-.I "delayed suspend"
-character (typically
-.BR ^Y ,
-Control-Y) causes the process to be stopped when it
-attempts to read input from the terminal, and control to
-be returned to
-.BR bash .
-The user may then manipulate the state of this job, using the
-.B bg
-command to continue it in the background, the
-.B fg
-command to continue it in the foreground, or
-the
-.B kill
-command to kill it. A \fB^Z\fP takes effect immediately,
-and has the additional side effect of causing pending output
-and typeahead to be discarded.
-.PP
-There are a number of ways to refer to a job in the shell.
-The character
-.B %
-introduces a job specification (\fIjobspec\fP). Job number
-.I n
-may be referred to as
-.BR %n .
-A job may also be referred to using a prefix of the name used to
-start it, or using a substring that appears in its command line.
-For example,
-.B %ce
-refers to a stopped
-.B ce
-job. If a prefix matches more than one job,
-.B bash
-reports an error. Using
-.BR %?ce ,
-on the other hand, refers to any job containing the string
-.B ce
-in its command line. If the substring matches more than one job,
-.B bash
-reports an error. The symbols
-.B %%
-and
-.B %+
-refer to the shell's notion of the
-.IR "current job" ,
-which is the last job stopped while it was in
-the foreground or started in the background.
-The
-.I "previous job"
-may be referenced using
-.BR %\- .
-If there is only a single job, \fB%+\fP and \fB%\-\fP can both be used
-to refer to that job.
-In output pertaining to jobs (e.g., the output of the
-.B jobs
-command), the current job is always flagged with a
-.BR + ,
-and the previous job with a
-.BR \- .
-A single % (with no accompanying job specification) also refers to the
-current job.
-.PP
-Simply naming a job can be used to bring it into the
-foreground:
-.B %1
-is a synonym for
-\fB``fg %1''\fP,
-bringing job 1 from the background into the foreground.
-Similarly,
-.B ``%1 &''
-resumes job 1 in the background, equivalent to
-\fB``bg %1''\fP.
-.PP
-The shell learns immediately whenever a job changes state.
-Normally,
-.B bash
-waits until it is about to print a prompt before reporting
-changes in a job's status so as to not interrupt
-any other output. If the
-.B \-b
-option to the
-.B set
-builtin command
-is enabled,
-.B bash
-reports such changes immediately.
-Any trap on
-.SM
-.B SIGCHLD
-is executed for each child that exits.
-.PP
-If an attempt to exit
-.B bash
-is made while jobs are stopped (or, if the \fBcheckjobs\fP shell option has
-been enabled using the \fBshopt\fP builtin, running), the shell prints a
-warning message, and, if the \fBcheckjobs\fP option is enabled, lists the
-jobs and their statuses.
-The
-.B jobs
-command may then be used to inspect their status.
-If a second attempt to exit is made without an intervening command,
-the shell does not print another warning, and any stopped
-jobs are terminated.
-.SH PROMPTING
-When executing interactively,
-.B bash
-displays the primary prompt
-.SM
-.B PS1
-when it is ready to read a command, and the secondary prompt
-.SM
-.B PS2
-when it needs more input to complete a command.
-.B Bash
-allows these prompt strings to be customized by inserting a number of
-backslash-escaped special characters that are decoded as follows:
-.RS
-.PD 0
-.TP
-.B \ea
-an ASCII bell character (07)
-.TP
-.B \ed
-the date in "Weekday Month Date" format (e.g., "Tue May 26")
-.TP
-.B \eD{\fIformat\fP}
-the \fIformat\fP is passed to \fIstrftime\fP(3) and the result is inserted
-into the prompt string; an empty \fIformat\fP results in a locale-specific
-time representation. The braces are required
-.TP
-.B \ee
-an ASCII escape character (033)
-.TP
-.B \eh
-the hostname up to the first `.'
-.TP
-.B \eH
-the hostname
-.TP
-.B \ej
-the number of jobs currently managed by the shell
-.TP
-.B \el
-the basename of the shell's terminal device name
-.TP
-.B \en
-newline
-.TP
-.B \er
-carriage return
-.TP
-.B \es
-the name of the shell, the basename of
-.B $0
-(the portion following the final slash)
-.TP
-.B \et
-the current time in 24-hour HH:MM:SS format
-.TP
-.B \eT
-the current time in 12-hour HH:MM:SS format
-.TP
-.B \e@
-the current time in 12-hour am/pm format
-.TP
-.B \eA
-the current time in 24-hour HH:MM format
-.TP
-.B \eu
-the username of the current user
-.TP
-.B \ev
-the version of \fBbash\fP (e.g., 2.00)
-.TP
-.B \eV
-the release of \fBbash\fP, version + patch level (e.g., 2.00.0)
-.TP
-.B \ew
-the current working directory, with
-.SM
-.B $HOME
-abbreviated with a tilde
-(uses the value of the
-.SM
-.B PROMPT_DIRTRIM
-variable)
-.TP
-.B \eW
-the basename of the current working directory, with
-.SM
-.B $HOME
-abbreviated with a tilde
-.TP
-.B \e!
-the history number of this command
-.TP
-.B \e#
-the command number of this command
-.TP
-.B \e$
-if the effective UID is 0, a
-.BR # ,
-otherwise a
-.B $
-.TP
-.B \e\fInnn\fP
-the character corresponding to the octal number \fInnn\fP
-.TP
-.B \e\e
-a backslash
-.TP
-.B \e[
-begin a sequence of non-printing characters, which could be used to
-embed a terminal control sequence into the prompt
-.TP
-.B \e]
-end a sequence of non-printing characters
-.PD
-.RE
-.PP
-The command number and the history number are usually different:
-the history number of a command is its position in the history
-list, which may include commands restored from the history file
-(see
-.SM
-.B HISTORY
-below), while the command number is the position in the sequence
-of commands executed during the current shell session.
-After the string is decoded, it is expanded via
-parameter expansion, command substitution, arithmetic
-expansion, and quote removal, subject to the value of the
-.B promptvars
-shell option (see the description of the
-.B shopt
-command under
-.SM
-.B "SHELL BUILTIN COMMANDS"
-below).
-.SH READLINE
-This is the library that handles reading input when using an interactive
-shell, unless the
-.B \-\-noediting
-option is given at shell invocation.
-Line editing is also used when using the \fB\-e\fP option to the
-\fBread\fP builtin.
-By default, the line editing commands are similar to those of Emacs.
-A vi-style line editing interface is also available.
-Line editing can be enabled at any time using the
-.B \-o emacs
-or
-.B \-o vi
-options to the
-.B set
-builtin (see
-.SM
-.B SHELL BUILTIN COMMANDS
-below).
-To turn off line editing after the shell is running, use the
-.B +o emacs
-or
-.B +o vi
-options to the
-.B set
-builtin.
-.SS "Readline Notation"
-.PP
-In this section, the Emacs-style notation is used to denote
-keystrokes. Control keys are denoted by C\-\fIkey\fR, e.g., C\-n
-means Control\-N. Similarly,
-.I meta
-keys are denoted by M\-\fIkey\fR, so M\-x means Meta\-X. (On keyboards
-without a
-.I meta
-key, M\-\fIx\fP means ESC \fIx\fP, i.e., press the Escape key
-then the
-.I x
-key. This makes ESC the \fImeta prefix\fP.
-The combination M\-C\-\fIx\fP means ESC\-Control\-\fIx\fP,
-or press the Escape key
-then hold the Control key while pressing the
-.I x
-key.)
-.PP
-Readline commands may be given numeric
-.IR arguments ,
-which normally act as a repeat count.
-Sometimes, however, it is the sign of the argument that is significant.
-Passing a negative argument to a command that acts in the forward
-direction (e.g., \fBkill\-line\fP) causes that command to act in a
-backward direction.
-Commands whose behavior with arguments deviates from this are noted
-below.
-.PP
-When a command is described as \fIkilling\fP text, the text
-deleted is saved for possible future retrieval
-(\fIyanking\fP). The killed text is saved in a
-\fIkill ring\fP. Consecutive kills cause the text to be
-accumulated into one unit, which can be yanked all at once.
-Commands which do not kill text separate the chunks of text
-on the kill ring.
-.SS "Readline Initialization"
-.PP
-Readline is customized by putting commands in an initialization
-file (the \fIinputrc\fP file).
-The name of this file is taken from the value of the
-.SM
-.B INPUTRC
-variable. If that variable is unset, the default is
-.IR ~/.inputrc .
-When a program which uses the readline library starts up, the
-initialization file is read, and the key bindings and variables
-are set.
-There are only a few basic constructs allowed in the
-readline initialization file.
-Blank lines are ignored.
-Lines beginning with a \fB#\fP are comments.
-Lines beginning with a \fB$\fP indicate conditional constructs.
-Other lines denote key bindings and variable settings.
-.PP
-The default key-bindings may be changed with an
-.I inputrc
-file.
-Other programs that use this library may add their own commands
-and bindings.
-.PP
-For example, placing
-.RS
-.PP
-M\-Control\-u: universal\-argument
-.RE
-or
-.RS
-C\-Meta\-u: universal\-argument
-.RE
-into the
-.I inputrc
-would make M\-C\-u execute the readline command
-.IR universal\-argument .
-.PP
-The following symbolic character names are recognized:
-.IR RUBOUT ,
-.IR DEL ,
-.IR ESC ,
-.IR LFD ,
-.IR NEWLINE ,
-.IR RET ,
-.IR RETURN ,
-.IR SPC ,
-.IR SPACE ,
-and
-.IR TAB .
-.PP
-In addition to command names, readline allows keys to be bound
-to a string that is inserted when the key is pressed (a \fImacro\fP).
-.SS "Readline Key Bindings"
-.PP
-The syntax for controlling key bindings in the
-.I inputrc
-file is simple. All that is required is the name of the
-command or the text of a macro and a key sequence to which
-it should be bound. The name may be specified in one of two ways:
-as a symbolic key name, possibly with \fIMeta\-\fP or \fIControl\-\fP
-prefixes, or as a key sequence.
-.PP
-When using the form \fBkeyname\fP:\^\fIfunction\-name\fP or \fImacro\fP,
-.I keyname
-is the name of a key spelled out in English. For example:
-.sp
-.RS
-Control-u: universal\-argument
-.br
-Meta-Rubout: backward-kill-word
-.br
-Control-o: "> output"
-.RE
-.LP
-In the above example,
-.I C\-u
-is bound to the function
-.BR universal\-argument ,
-.I M\-DEL
-is bound to the function
-.BR backward\-kill\-word ,
-and
-.I C\-o
-is bound to run the macro
-expressed on the right hand side (that is, to insert the text
-.if t \f(CW> output\fP
-.if n ``> output''
-into the line).
-.PP
-In the second form, \fB"keyseq"\fP:\^\fIfunction\-name\fP or \fImacro\fP,
-.B keyseq
-differs from
-.B keyname
-above in that strings denoting
-an entire key sequence may be specified by placing the sequence
-within double quotes. Some GNU Emacs style key escapes can be
-used, as in the following example, but the symbolic character names
-are not recognized.
-.sp
-.RS
-"\eC\-u": universal\-argument
-.br
-"\eC\-x\eC\-r": re\-read\-init\-file
-.br
-"\ee[11~": "Function Key 1"
-.RE
-.PP
-In this example,
-.I C\-u
-is again bound to the function
-.BR universal\-argument .
-.I "C\-x C\-r"
-is bound to the function
-.BR re\-read\-init\-file ,
-and
-.I "ESC [ 1 1 ~"
-is bound to insert the text
-.if t \f(CWFunction Key 1\fP.
-.if n ``Function Key 1''.
-.PP
-The full set of GNU Emacs style escape sequences is
-.RS
-.PD 0
-.TP
-.B \eC\-
-control prefix
-.TP
-.B \eM\-
-meta prefix
-.TP
-.B \ee
-an escape character
-.TP
-.B \e\e
-backslash
-.TP
-.B \e"
-literal "
-.TP
-.B \e\(aq
-literal \(aq
-.RE
-.PD
-.PP
-In addition to the GNU Emacs style escape sequences, a second
-set of backslash escapes is available:
-.RS
-.PD 0
-.TP
-.B \ea
-alert (bell)
-.TP
-.B \eb
-backspace
-.TP
-.B \ed
-delete
-.TP
-.B \ef
-form feed
-.TP
-.B \en
-newline
-.TP
-.B \er
-carriage return
-.TP
-.B \et
-horizontal tab
-.TP
-.B \ev
-vertical tab
-.TP
-.B \e\fInnn\fP
-the eight-bit character whose value is the octal value \fInnn\fP
-(one to three digits)
-.TP
-.B \ex\fIHH\fP
-the eight-bit character whose value is the hexadecimal value \fIHH\fP
-(one or two hex digits)
-.RE
-.PD
-.PP
-When entering the text of a macro, single or double quotes must
-be used to indicate a macro definition.
-Unquoted text is assumed to be a function name.
-In the macro body, the backslash escapes described above are expanded.
-Backslash will quote any other character in the macro text,
-including " and \(aq.
-.PP
-.B Bash
-allows the current readline key bindings to be displayed or modified
-with the
-.B bind
-builtin command. The editing mode may be switched during interactive
-use by using the
-.B \-o
-option to the
-.B set
-builtin command (see
-.SM
-.B SHELL BUILTIN COMMANDS
-below).
-.SS "Readline Variables"
-.PP
-Readline has variables that can be used to further customize its
-behavior. A variable may be set in the
-.I inputrc
-file with a statement of the form
-.RS
-.PP
-\fBset\fP \fIvariable\-name\fP \fIvalue\fP
-.RE
-.PP
-Except where noted, readline variables can take the values
-.B On
-or
-.B Off
-(without regard to case).
-Unrecognized variable names are ignored.
-When a variable value is read, empty or null values, "on" (case-insensitive),
-and "1" are equivalent to \fBOn\fP. All other values are equivalent to
-\fBOff\fP.
-The variables and their default values are:
-.PP
-.PD 0
-.TP
-.B bell\-style (audible)
-Controls what happens when readline wants to ring the terminal bell.
-If set to \fBnone\fP, readline never rings the bell. If set to
-\fBvisible\fP, readline uses a visible bell if one is available.
-If set to \fBaudible\fP, readline attempts to ring the terminal's bell.
-.TP
-.B bind\-tty\-special\-chars (On)
-If set to \fBOn\fP, readline attempts to bind the control characters
-treated specially by the kernel's terminal driver to their readline
-equivalents.
-.TP
-.B comment\-begin (``#'')
-The string that is inserted when the readline
-.B insert\-comment
-command is executed.
-This command is bound to
-.B M\-#
-in emacs mode and to
-.B #
-in vi command mode.
-.TP
-.B completion\-ignore\-case (Off)
-If set to \fBOn\fP, readline performs filename matching and completion
-in a case\-insensitive fashion.
-.TP
-.B completion\-prefix\-display\-length (0)
-The length in characters of the common prefix of a list of possible
-completions that is displayed without modification. When set to a
-value greater than zero, common prefixes longer than this value are
-replaced with an ellipsis when displaying possible completions.
-.TP
-.B completion\-query\-items (100)
-This determines when the user is queried about viewing
-the number of possible completions
-generated by the \fBpossible\-completions\fP command.
-It may be set to any integer value greater than or equal to
-zero. If the number of possible completions is greater than
-or equal to the value of this variable, the user is asked whether
-or not he wishes to view them; otherwise they are simply listed
-on the terminal.
-.TP
-.B convert\-meta (On)
-If set to \fBOn\fP, readline will convert characters with the
-eighth bit set to an ASCII key sequence
-by stripping the eighth bit and prefixing an
-escape character (in effect, using escape as the \fImeta prefix\fP).
-.TP
-.B disable\-completion (Off)
-If set to \fBOn\fP, readline will inhibit word completion. Completion
-characters will be inserted into the line as if they had been
-mapped to \fBself-insert\fP.
-.TP
-.B editing\-mode (emacs)
-Controls whether readline begins with a set of key bindings similar
-to \fIEmacs\fP or \fIvi\fP.
-.B editing\-mode
-can be set to either
-.B emacs
-or
-.BR vi .
-.TP
-.B echo\-control\-characters (On)
-When set to \fBOn\fP, on operating systems that indicate they support it,
-readline echoes a character corresponding to a signal generated from the
-keyboard.
-.TP
-.B enable\-keypad (Off)
-When set to \fBOn\fP, readline will try to enable the application
-keypad when it is called. Some systems need this to enable the
-arrow keys.
-.TP
-.B enable\-meta\-key (On)
-When set to \fBOn\fP, readline will try to enable any meta modifier
-key the terminal claims to support when it is called. On many terminals,
-the meta key is used to send eight-bit characters.
-.TP
-.B expand\-tilde (Off)
-If set to \fBOn\fP, tilde expansion is performed when readline
-attempts word completion.
-.TP
-.B history\-preserve\-point (Off)
-If set to \fBOn\fP, the history code attempts to place point at the
-same location on each history line retrieved with \fBprevious-history\fP
-or \fBnext-history\fP.
-.TP
-.B history\-size (0)
-Set the maximum number of history entries saved in the history list. If
-set to zero, the number of entries in the history list is not limited.
-.TP
-.B horizontal\-scroll\-mode (Off)
-When set to \fBOn\fP, makes readline use a single line for display,
-scrolling the input horizontally on a single screen line when it
-becomes longer than the screen width rather than wrapping to a new line.
-.TP
-.B input\-meta (Off)
-If set to \fBOn\fP, readline will enable eight-bit input (that is,
-it will not strip the high bit from the characters it reads),
-regardless of what the terminal claims it can support. The name
-.B meta\-flag
-is a synonym for this variable.
-.TP
-.B isearch\-terminators (``C\-[C\-J'')
-The string of characters that should terminate an incremental
-search without subsequently executing the character as a command.
-If this variable has not been given a value, the characters
-\fIESC\fP and \fIC\-J\fP will terminate an incremental search.
-.TP
-.B keymap (emacs)
-Set the current readline keymap. The set of valid keymap names is
-\fIemacs, emacs\-standard, emacs\-meta, emacs\-ctlx, vi,
-vi\-command\fP, and
-.IR vi\-insert .
-\fIvi\fP is equivalent to \fIvi\-command\fP; \fIemacs\fP is
-equivalent to \fIemacs\-standard\fP. The default value is
-.IR emacs ;
-the value of
-.B editing\-mode
-also affects the default keymap.
-.TP
-.B mark\-directories (On)
-If set to \fBOn\fP, completed directory names have a slash
-appended.
-.TP
-.B mark\-modified\-lines (Off)
-If set to \fBOn\fP, history lines that have been modified are displayed
-with a preceding asterisk (\fB*\fP).
-.TP
-.B mark\-symlinked\-directories (Off)
-If set to \fBOn\fP, completed names which are symbolic links to directories
-have a slash appended (subject to the value of
-\fBmark\-directories\fP).
-.TP
-.B match\-hidden\-files (On)
-This variable, when set to \fBOn\fP, causes readline to match files whose
-names begin with a `.' (hidden files) when performing filename
-completion.
-If set to \fBOff\fP, the leading `.' must be
-supplied by the user in the filename to be completed.
-.TP
-.B menu\-complete\-display\-prefix (Off)
-If set to \fBOn\fP, menu completion displays the common prefix of the
-list of possible completions (which may be empty) before cycling through
-the list.
-.TP
-.B output\-meta (Off)
-If set to \fBOn\fP, readline will display characters with the
-eighth bit set directly rather than as a meta-prefixed escape
-sequence.
-.TP
-.B page\-completions (On)
-If set to \fBOn\fP, readline uses an internal \fImore\fP-like pager
-to display a screenful of possible completions at a time.
-.TP
-.B print\-completions\-horizontally (Off)
-If set to \fBOn\fP, readline will display completions with matches
-sorted horizontally in alphabetical order, rather than down the screen.
-.TP
-.B revert\-all\-at\-newline (Off)
-If set to \fBOn\fP, readline will undo all changes to history lines
-before returning when \fBaccept\-line\fP is executed. By default,
-history lines may be modified and retain individual undo lists across
-calls to \fBreadline\fP.
-.TP
-.B show\-all\-if\-ambiguous (Off)
-This alters the default behavior of the completion functions. If
-set to
-.BR On ,
-words which have more than one possible completion cause the
-matches to be listed immediately instead of ringing the bell.
-.TP
-.B show\-all\-if\-unmodified (Off)
-This alters the default behavior of the completion functions in
-a fashion similar to \fBshow\-all\-if\-ambiguous\fP.
-If set to
-.BR On ,
-words which have more than one possible completion without any
-possible partial completion (the possible completions don't share
-a common prefix) cause the matches to be listed immediately instead
-of ringing the bell.
-.TP
-.B skip\-completed\-text (Off)
-If set to \fBOn\fP, this alters the default completion behavior when
-inserting a single match into the line. It's only active when
-performing completion in the middle of a word. If enabled, readline
-does not insert characters from the completion that match characters
-after point in the word being completed, so portions of the word
-following the cursor are not duplicated.
-.TP
-.B visible\-stats (Off)
-If set to \fBOn\fP, a character denoting a file's type as reported
-by \fIstat\fP(2) is appended to the filename when listing possible
-completions.
-.PD
-.SS "Readline Conditional Constructs"
-.PP
-Readline implements a facility similar in spirit to the conditional
-compilation features of the C preprocessor which allows key
-bindings and variable settings to be performed as the result
-of tests. There are four parser directives used.
-.IP \fB$if\fP
-The
-.B $if
-construct allows bindings to be made based on the
-editing mode, the terminal being used, or the application using
-readline. The text of the test extends to the end of the line;
-no characters are required to isolate it.
-.RS
-.IP \fBmode\fP
-The \fBmode=\fP form of the \fB$if\fP directive is used to test
-whether readline is in emacs or vi mode.
-This may be used in conjunction
-with the \fBset keymap\fP command, for instance, to set bindings in
-the \fIemacs\-standard\fP and \fIemacs\-ctlx\fP keymaps only if
-readline is starting out in emacs mode.
-.IP \fBterm\fP
-The \fBterm=\fP form may be used to include terminal-specific
-key bindings, perhaps to bind the key sequences output by the
-terminal's function keys. The word on the right side of the
-.B =
-is tested against the both full name of the terminal and the portion
-of the terminal name before the first \fB\-\fP. This allows
-.I sun
-to match both
-.I sun
-and
-.IR sun\-cmd ,
-for instance.
-.IP \fBapplication\fP
-The \fBapplication\fP construct is used to include
-application-specific settings. Each program using the readline
-library sets the \fIapplication name\fP, and an initialization
-file can test for a particular value.
-This could be used to bind key sequences to functions useful for
-a specific program. For instance, the following command adds a
-key sequence that quotes the current or previous word in \fBbash\fP:
-.sp 1
-.RS
-.nf
-\fB$if\fP Bash
-# Quote the current or previous word
-"\eC\-xq": "\eeb\e"\eef\e""
-\fB$endif\fP
-.fi
-.RE
-.RE
-.IP \fB$endif\fP
-This command, as seen in the previous example, terminates an
-\fB$if\fP command.
-.IP \fB$else\fP
-Commands in this branch of the \fB$if\fP directive are executed if
-the test fails.
-.IP \fB$include\fP
-This directive takes a single filename as an argument and reads commands
-and bindings from that file. For example, the following directive
-would read \fI/etc/inputrc\fP:
-.sp 1
-.RS
-.nf
-\fB$include\fP \^ \fI/etc/inputrc\fP
-.fi
-.RE
-.SS Searching
-.PP
-Readline provides commands for searching through the command history
-(see
-.SM
-.B HISTORY
-below) for lines containing a specified string.
-There are two search modes:
-.I incremental
-and
-.IR non-incremental .
-.PP
-Incremental searches begin before the user has finished typing the
-search string.
-As each character of the search string is typed, readline displays
-the next entry from the history matching the string typed so far.
-An incremental search requires only as many characters as needed to
-find the desired history entry.
-The characters present in the value of the \fBisearch-terminators\fP
-variable are used to terminate an incremental search.
-If that variable has not been assigned a value the Escape and
-Control-J characters will terminate an incremental search.
-Control-G will abort an incremental search and restore the original
-line.
-When the search is terminated, the history entry containing the
-search string becomes the current line.
-.PP
-To find other matching entries in the history list, type Control-S or
-Control-R as appropriate.
-This will search backward or forward in the history for the next
-entry matching the search string typed so far.
-Any other key sequence bound to a readline command will terminate
-the search and execute that command.
-For instance, a \fInewline\fP will terminate the search and accept
-the line, thereby executing the command from the history list.
-.PP
-Readline remembers the last incremental search string. If two
-Control-Rs are typed without any intervening characters defining a
-new search string, any remembered search string is used.
-.PP
-Non-incremental searches read the entire search string before starting
-to search for matching history lines. The search string may be
-typed by the user or be part of the contents of the current line.
-.SS "Readline Command Names"
-.PP
-The following is a list of the names of the commands and the default
-key sequences to which they are bound.
-Command names without an accompanying key sequence are unbound by default.
-In the following descriptions, \fIpoint\fP refers to the current cursor
-position, and \fImark\fP refers to a cursor position saved by the
-\fBset\-mark\fP command.
-The text between the point and mark is referred to as the \fIregion\fP.
-.SS Commands for Moving
-.PP
-.PD 0
-.TP
-.B beginning\-of\-line (C\-a)
-Move to the start of the current line.
-.TP
-.B end\-of\-line (C\-e)
-Move to the end of the line.
-.TP
-.B forward\-char (C\-f)
-Move forward a character.
-.TP
-.B backward\-char (C\-b)
-Move back a character.
-.TP
-.B forward\-word (M\-f)
-Move forward to the end of the next word. Words are composed of
-alphanumeric characters (letters and digits).
-.TP
-.B backward\-word (M\-b)
-Move back to the start of the current or previous word.
-Words are composed of alphanumeric characters (letters and digits).
-.TP
-.B shell\-forward\-word
-Move forward to the end of the next word.
-Words are delimited by non-quoted shell metacharacters.
-.TP
-.B shell\-backward\-word
-Move back to the start of the current or previous word.
-Words are delimited by non-quoted shell metacharacters.
-.TP
-.B clear\-screen (C\-l)
-Clear the screen leaving the current line at the top of the screen.
-With an argument, refresh the current line without clearing the
-screen.
-.TP
-.B redraw\-current\-line
-Refresh the current line.
-.PD
-.SS Commands for Manipulating the History
-.PP
-.PD 0
-.TP
-.B accept\-line (Newline, Return)
-Accept the line regardless of where the cursor is. If this line is
-non-empty, add it to the history list according to the state of the
-.SM
-.B HISTCONTROL
-variable. If the line is a modified history
-line, then restore the history line to its original state.
-.TP
-.B previous\-history (C\-p)
-Fetch the previous command from the history list, moving back in
-the list.
-.TP
-.B next\-history (C\-n)
-Fetch the next command from the history list, moving forward in the
-list.
-.TP
-.B beginning\-of\-history (M\-<)
-Move to the first line in the history.
-.TP
-.B end\-of\-history (M\->)
-Move to the end of the input history, i.e., the line currently being
-entered.
-.TP
-.B reverse\-search\-history (C\-r)
-Search backward starting at the current line and moving `up' through
-the history as necessary. This is an incremental search.
-.TP
-.B forward\-search\-history (C\-s)
-Search forward starting at the current line and moving `down' through
-the history as necessary. This is an incremental search.
-.TP
-.B non\-incremental\-reverse\-search\-history (M\-p)
-Search backward through the history starting at the current line
-using a non-incremental search for a string supplied by the user.
-.TP
-.B non\-incremental\-forward\-search\-history (M\-n)
-Search forward through the history using a non-incremental search for
-a string supplied by the user.
-.TP
-.B history\-search\-forward
-Search forward through the history for the string of characters
-between the start of the current line and the point.
-This is a non-incremental search.
-.TP
-.B history\-search\-backward
-Search backward through the history for the string of characters
-between the start of the current line and the point.
-This is a non-incremental search.
-.TP
-.B yank\-nth\-arg (M\-C\-y)
-Insert the first argument to the previous command (usually
-the second word on the previous line) at point.
-With an argument
-.IR n ,
-insert the \fIn\fPth word from the previous command (the words
-in the previous command begin with word 0). A negative argument
-inserts the \fIn\fPth word from the end of the previous command.
-Once the argument \fIn\fP is computed, the argument is extracted
-as if the "!\fIn\fP" history expansion had been specified.
-.TP
-.B
-yank\-last\-arg (M\-.\^, M\-_\^)
-Insert the last argument to the previous command (the last word of
-the previous history entry).
-With a numeric argument, behave exactly like \fByank\-nth\-arg\fP.
-Successive calls to \fByank\-last\-arg\fP move back through the history
-list, inserting the last word (or the word specified by the argument to
-the first call) of each line in turn.
-Any numeric argument supplied to these successive calls determines
-the direction to move through the history. A negative argument switches
-the direction through the history (back or forward).
-The history expansion facilities are used to extract the last argument,
-as if the "!$" history expansion had been specified.
-.TP
-.B shell\-expand\-line (M\-C\-e)
-Expand the line as the shell does. This
-performs alias and history expansion as well as all of the shell
-word expansions. See
-.SM
-.B HISTORY EXPANSION
-below for a description of history expansion.
-.TP
-.B history\-expand\-line (M\-^)
-Perform history expansion on the current line.
-See
-.SM
-.B HISTORY EXPANSION
-below for a description of history expansion.
-.TP
-.B magic\-space
-Perform history expansion on the current line and insert a space.
-See
-.SM
-.B HISTORY EXPANSION
-below for a description of history expansion.
-.TP
-.B alias\-expand\-line
-Perform alias expansion on the current line.
-See
-.SM
-.B ALIASES
-above for a description of alias expansion.
-.TP
-.B history\-and\-alias\-expand\-line
-Perform history and alias expansion on the current line.
-.TP
-.B insert\-last\-argument (M\-.\^, M\-_\^)
-A synonym for \fByank\-last\-arg\fP.
-.TP
-.B operate\-and\-get\-next (C\-o)
-Accept the current line for execution and fetch the next line
-relative to the current line from the history for editing. Any
-argument is ignored.
-.TP
-.B edit\-and\-execute\-command (C\-xC\-e)
-Invoke an editor on the current command line, and execute the result as shell
-commands.
-\fBBash\fP attempts to invoke
-.SM
-.BR $VISUAL ,
-.SM
-.BR $EDITOR ,
-and \fIemacs\fP as the editor, in that order.
-.PD
-.SS Commands for Changing Text
-.PP
-.PD 0
-.TP
-.B delete\-char (C\-d)
-Delete the character at point. If point is at the
-beginning of the line, there are no characters in the line, and
-the last character typed was not bound to \fBdelete\-char\fP,
-then return
-.SM
-.BR EOF .
-.TP
-.B backward\-delete\-char (Rubout)
-Delete the character behind the cursor. When given a numeric argument,
-save the deleted text on the kill ring.
-.TP
-.B forward\-backward\-delete\-char
-Delete the character under the cursor, unless the cursor is at the
-end of the line, in which case the character behind the cursor is
-deleted.
-.TP
-.B quoted\-insert (C\-q, C\-v)
-Add the next character typed to the line verbatim. This is
-how to insert characters like \fBC\-q\fP, for example.
-.TP
-.B tab\-insert (C\-v TAB)
-Insert a tab character.
-.TP
-.B self\-insert (a,\ b,\ A,\ 1,\ !,\ ...)
-Insert the character typed.
-.TP
-.B transpose\-chars (C\-t)
-Drag the character before point forward over the character at point,
-moving point forward as well.
-If point is at the end of the line, then this transposes
-the two characters before point.
-Negative arguments have no effect.
-.TP
-.B transpose\-words (M\-t)
-Drag the word before point past the word after point,
-moving point over that word as well.
-If point is at the end of the line, this transposes
-the last two words on the line.
-.TP
-.B upcase\-word (M\-u)
-Uppercase the current (or following) word. With a negative argument,
-uppercase the previous word, but do not move point.
-.TP
-.B downcase\-word (M\-l)
-Lowercase the current (or following) word. With a negative argument,
-lowercase the previous word, but do not move point.
-.TP
-.B capitalize\-word (M\-c)
-Capitalize the current (or following) word. With a negative argument,
-capitalize the previous word, but do not move point.
-.TP
-.B overwrite\-mode
-Toggle overwrite mode. With an explicit positive numeric argument,
-switches to overwrite mode. With an explicit non-positive numeric
-argument, switches to insert mode. This command affects only
-\fBemacs\fP mode; \fBvi\fP mode does overwrite differently.
-Each call to \fIreadline()\fP starts in insert mode.
-In overwrite mode, characters bound to \fBself\-insert\fP replace
-the text at point rather than pushing the text to the right.
-Characters bound to \fBbackward\-delete\-char\fP replace the character
-before point with a space. By default, this command is unbound.
-.PD
-.SS Killing and Yanking
-.PP
-.PD 0
-.TP
-.B kill\-line (C\-k)
-Kill the text from point to the end of the line.
-.TP
-.B backward\-kill\-line (C\-x Rubout)
-Kill backward to the beginning of the line.
-.TP
-.B unix\-line\-discard (C\-u)
-Kill backward from point to the beginning of the line.
-The killed text is saved on the kill-ring.
-.\" There is no real difference between this and backward-kill-line
-.TP
-.B kill\-whole\-line
-Kill all characters on the current line, no matter where point is.
-.TP
-.B kill\-word (M\-d)
-Kill from point to the end of the current word, or if between
-words, to the end of the next word.
-Word boundaries are the same as those used by \fBforward\-word\fP.
-.TP
-.B backward\-kill\-word (M\-Rubout)
-Kill the word behind point.
-Word boundaries are the same as those used by \fBbackward\-word\fP.
-.TP
-.B shell\-kill\-word (M\-d)
-Kill from point to the end of the current word, or if between
-words, to the end of the next word.
-Word boundaries are the same as those used by \fBshell\-forward\-word\fP.
-.TP
-.B shell\-backward\-kill\-word (M\-Rubout)
-Kill the word behind point.
-Word boundaries are the same as those used by \fBshell\-backward\-word\fP.
-.TP
-.B unix\-word\-rubout (C\-w)
-Kill the word behind point, using white space as a word boundary.
-The killed text is saved on the kill-ring.
-.TP
-.B unix\-filename\-rubout
-Kill the word behind point, using white space and the slash character
-as the word boundaries.
-The killed text is saved on the kill-ring.
-.TP
-.B delete\-horizontal\-space (M\-\e)
-Delete all spaces and tabs around point.
-.TP
-.B kill\-region
-Kill the text in the current region.
-.TP
-.B copy\-region\-as\-kill
-Copy the text in the region to the kill buffer.
-.TP
-.B copy\-backward\-word
-Copy the word before point to the kill buffer.
-The word boundaries are the same as \fBbackward\-word\fP.
-.TP
-.B copy\-forward\-word
-Copy the word following point to the kill buffer.
-The word boundaries are the same as \fBforward\-word\fP.
-.TP
-.B yank (C\-y)
-Yank the top of the kill ring into the buffer at point.
-.TP
-.B yank\-pop (M\-y)
-Rotate the kill ring, and yank the new top. Only works following
-.B yank
-or
-.BR yank\-pop .
-.PD
-.SS Numeric Arguments
-.PP
-.PD 0
-.TP
-.B digit\-argument (M\-0, M\-1, ..., M\-\-)
-Add this digit to the argument already accumulating, or start a new
-argument. M\-\- starts a negative argument.
-.TP
-.B universal\-argument
-This is another way to specify an argument.
-If this command is followed by one or more digits, optionally with a
-leading minus sign, those digits define the argument.
-If the command is followed by digits, executing
-.B universal\-argument
-again ends the numeric argument, but is otherwise ignored.
-As a special case, if this command is immediately followed by a
-character that is neither a digit or minus sign, the argument count
-for the next command is multiplied by four.
-The argument count is initially one, so executing this function the
-first time makes the argument count four, a second time makes the
-argument count sixteen, and so on.
-.PD
-.SS Completing
-.PP
-.PD 0
-.TP
-.B complete (TAB)
-Attempt to perform completion on the text before point.
-.B Bash
-attempts completion treating the text as a variable (if the
-text begins with \fB$\fP), username (if the text begins with
-\fB~\fP), hostname (if the text begins with \fB@\fP), or
-command (including aliases and functions) in turn. If none
-of these produces a match, filename completion is attempted.
-.TP
-.B possible\-completions (M\-?)
-List the possible completions of the text before point.
-.TP
-.B insert\-completions (M\-*)
-Insert all completions of the text before point
-that would have been generated by
-\fBpossible\-completions\fP.
-.TP
-.B menu\-complete
-Similar to \fBcomplete\fP, but replaces the word to be completed
-with a single match from the list of possible completions.
-Repeated execution of \fBmenu\-complete\fP steps through the list
-of possible completions, inserting each match in turn.
-At the end of the list of completions, the bell is rung
-(subject to the setting of \fBbell\-style\fP)
-and the original text is restored.
-An argument of \fIn\fP moves \fIn\fP positions forward in the list
-of matches; a negative argument may be used to move backward
-through the list.
-This command is intended to be bound to \fBTAB\fP, but is unbound
-by default.
-.TP
-.B menu\-complete\-backward
-Identical to \fBmenu\-complete\fP, but moves backward through the list
-of possible completions, as if \fBmenu\-complete\fP had been given a
-negative argument. This command is unbound by default.
-.TP
-.B delete\-char\-or\-list
-Deletes the character under the cursor if not at the beginning or
-end of the line (like \fBdelete\-char\fP).
-If at the end of the line, behaves identically to
-\fBpossible\-completions\fP.
-This command is unbound by default.
-.TP
-.B complete\-filename (M\-/)
-Attempt filename completion on the text before point.
-.TP
-.B possible\-filename\-completions (C\-x /)
-List the possible completions of the text before point,
-treating it as a filename.
-.TP
-.B complete\-username (M\-~)
-Attempt completion on the text before point, treating
-it as a username.
-.TP
-.B possible\-username\-completions (C\-x ~)
-List the possible completions of the text before point,
-treating it as a username.
-.TP
-.B complete\-variable (M\-$)
-Attempt completion on the text before point, treating
-it as a shell variable.
-.TP
-.B possible\-variable\-completions (C\-x $)
-List the possible completions of the text before point,
-treating it as a shell variable.
-.TP
-.B complete\-hostname (M\-@)
-Attempt completion on the text before point, treating
-it as a hostname.
-.TP
-.B possible\-hostname\-completions (C\-x @)
-List the possible completions of the text before point,
-treating it as a hostname.
-.TP
-.B complete\-command (M\-!)
-Attempt completion on the text before point, treating
-it as a command name. Command completion attempts to
-match the text against aliases, reserved words, shell
-functions, shell builtins, and finally executable filenames,
-in that order.
-.TP
-.B possible\-command\-completions (C\-x !)
-List the possible completions of the text before point,
-treating it as a command name.
-.TP
-.B dynamic\-complete\-history (M\-TAB)
-Attempt completion on the text before point, comparing
-the text against lines from the history list for possible
-completion matches.
-.TP
-.B dabbrev\-expand
-Attempt menu completion on the text before point, comparing
-the text against lines from the history list for possible
-completion matches.
-.TP
-.B complete\-into\-braces (M\-{)
-Perform filename completion and insert the list of possible completions
-enclosed within braces so the list is available to the shell (see
-.B Brace Expansion
-above).
-.PD
-.SS Keyboard Macros
-.PP
-.PD 0
-.TP
-.B start\-kbd\-macro (C\-x (\^)
-Begin saving the characters typed into the current keyboard macro.
-.TP
-.B end\-kbd\-macro (C\-x )\^)
-Stop saving the characters typed into the current keyboard macro
-and store the definition.
-.TP
-.B call\-last\-kbd\-macro (C\-x e)
-Re-execute the last keyboard macro defined, by making the characters
-in the macro appear as if typed at the keyboard.
-.PD
-.SS Miscellaneous
-.PP
-.PD 0
-.TP
-.B re\-read\-init\-file (C\-x C\-r)
-Read in the contents of the \fIinputrc\fP file, and incorporate
-any bindings or variable assignments found there.
-.TP
-.B abort (C\-g)
-Abort the current editing command and
-ring the terminal's bell (subject to the setting of
-.BR bell\-style ).
-.TP
-.B do\-uppercase\-version (M\-a, M\-b, M\-\fIx\fP, ...)
-If the metafied character \fIx\fP is lowercase, run the command
-that is bound to the corresponding uppercase character.
-.TP
-.B prefix\-meta (ESC)
-Metafy the next character typed.
-.SM
-.B ESC
-.B f
-is equivalent to
-.BR Meta\-f .
-.TP
-.B undo (C\-_, C\-x C\-u)
-Incremental undo, separately remembered for each line.
-.TP
-.B revert\-line (M\-r)
-Undo all changes made to this line. This is like executing the
-.B undo
-command enough times to return the line to its initial state.
-.TP
-.B tilde\-expand (M\-&)
-Perform tilde expansion on the current word.
-.TP
-.B set\-mark (C\-@, M\-<space>)
-Set the mark to the point. If a
-numeric argument is supplied, the mark is set to that position.
-.TP
-.B exchange\-point\-and\-mark (C\-x C\-x)
-Swap the point with the mark. The current cursor position is set to
-the saved position, and the old cursor position is saved as the mark.
-.TP
-.B character\-search (C\-])
-A character is read and point is moved to the next occurrence of that
-character. A negative count searches for previous occurrences.
-.TP
-.B character\-search\-backward (M\-C\-])
-A character is read and point is moved to the previous occurrence of that
-character. A negative count searches for subsequent occurrences.
-.TP
-.B skip\-csi\-sequence
-Read enough characters to consume a multi-key sequence such as those
-defined for keys like Home and End. Such sequences begin with a
-Control Sequence Indicator (CSI), usually ESC\-[. If this sequence is
-bound to "\e[", keys producing such sequences will have no effect
-unless explicitly bound to a readline command, instead of inserting
-stray characters into the editing buffer. This is unbound by default,
-but usually bound to ESC\-[.
-.TP
-.B insert\-comment (M\-#)
-Without a numeric argument, the value of the readline
-.B comment\-begin
-variable is inserted at the beginning of the current line.
-If a numeric argument is supplied, this command acts as a toggle: if
-the characters at the beginning of the line do not match the value
-of \fBcomment\-begin\fP, the value is inserted, otherwise
-the characters in \fBcomment\-begin\fP are deleted from the beginning of
-the line.
-In either case, the line is accepted as if a newline had been typed.
-The default value of
-\fBcomment\-begin\fP causes this command to make the current line
-a shell comment.
-If a numeric argument causes the comment character to be removed, the line
-will be executed by the shell.
-.TP
-.B glob\-complete\-word (M\-g)
-The word before point is treated as a pattern for pathname expansion,
-with an asterisk implicitly appended. This pattern is used to
-generate a list of matching file names for possible completions.
-.TP
-.B glob\-expand\-word (C\-x *)
-The word before point is treated as a pattern for pathname expansion,
-and the list of matching file names is inserted, replacing the word.
-If a numeric argument is supplied, an asterisk is appended before
-pathname expansion.
-.TP
-.B glob\-list\-expansions (C\-x g)
-The list of expansions that would have been generated by
-.B glob\-expand\-word
-is displayed, and the line is redrawn.
-If a numeric argument is supplied, an asterisk is appended before
-pathname expansion.
-.TP
-.B dump\-functions
-Print all of the functions and their key bindings to the
-readline output stream. If a numeric argument is supplied,
-the output is formatted in such a way that it can be made part
-of an \fIinputrc\fP file.
-.TP
-.B dump\-variables
-Print all of the settable readline variables and their values to the
-readline output stream. If a numeric argument is supplied,
-the output is formatted in such a way that it can be made part
-of an \fIinputrc\fP file.
-.TP
-.B dump\-macros
-Print all of the readline key sequences bound to macros and the
-strings they output. If a numeric argument is supplied,
-the output is formatted in such a way that it can be made part
-of an \fIinputrc\fP file.
-.TP
-.B display\-shell\-version (C\-x C\-v)
-Display version information about the current instance of
-.BR bash .
-.PD
-.SS Programmable Completion
-.PP
-When word completion is attempted for an argument to a command for
-which a completion specification (a \fIcompspec\fP) has been defined
-using the \fBcomplete\fP builtin (see
-.SM
-.B "SHELL BUILTIN COMMANDS"
-below), the programmable completion facilities are invoked.
-.PP
-First, the command name is identified.
-If the command word is the empty string (completion attempted at the
-beginning of an empty line), any compspec defined with
-the \fB\-E\fP option to \fBcomplete\fP is used.
-If a compspec has been defined for that command, the
-compspec is used to generate the list of possible completions for the word.
-If the command word is a full pathname, a compspec for the full
-pathname is searched for first.
-If no compspec is found for the full pathname, an attempt is made to
-find a compspec for the portion following the final slash.
-If those searches do not result in a compspec, any compspec defined with
-the \fB\-D\fP option to \fBcomplete\fP is used as the default.
-.PP
-Once a compspec has been found, it is used to generate the list of
-matching words.
-If a compspec is not found, the default \fBbash\fP completion as
-described above under \fBCompleting\fP is performed.
-.PP
-First, the actions specified by the compspec are used.
-Only matches which are prefixed by the word being completed are
-returned.
-When the
-.B \-f
-or
-.B \-d
-option is used for filename or directory name completion, the shell
-variable
-.SM
-.B FIGNORE
-is used to filter the matches.
-.PP
-Any completions specified by a pathname expansion pattern to the
-\fB\-G\fP option are generated next.
-The words generated by the pattern need not match the word
-being completed.
-The
-.SM
-.B GLOBIGNORE
-shell variable is not used to filter the matches, but the
-.SM
-.B FIGNORE
-variable is used.
-.PP
-Next, the string specified as the argument to the \fB\-W\fP option
-is considered.
-The string is first split using the characters in the
-.SM
-.B IFS
-special variable as delimiters.
-Shell quoting is honored.
-Each word is then expanded using
-brace expansion, tilde expansion, parameter and variable expansion,
-command substitution, and arithmetic expansion,
-as described above under
-.SM
-.BR EXPANSION .
-The results are split using the rules described above under
-\fBWord Splitting\fP.
-The results of the expansion are prefix-matched against the word being
-completed, and the matching words become the possible completions.
-.PP
-After these matches have been generated, any shell function or command
-specified with the \fB\-F\fP and \fB\-C\fP options is invoked.
-When the command or function is invoked, the
-.SM
-.BR COMP_LINE ,
-.SM
-.BR COMP_POINT ,
-.SM
-.BR COMP_KEY ,
-and
-.SM
-.B COMP_TYPE
-variables are assigned values as described above under
-\fBShell Variables\fP.
-If a shell function is being invoked, the
-.SM
-.B COMP_WORDS
-and
-.SM
-.B COMP_CWORD
-variables are also set.
-When the function or command is invoked, the first argument is the
-name of the command whose arguments are being completed, the
-second argument is the word being completed, and the third argument
-is the word preceding the word being completed on the current command line.
-No filtering of the generated completions against the word being completed
-is performed; the function or command has complete freedom in generating
-the matches.
-.PP
-Any function specified with \fB\-F\fP is invoked first.
-The function may use any of the shell facilities, including the
-\fBcompgen\fP builtin described below, to generate the matches.
-It must put the possible completions in the
-.SM
-.B COMPREPLY
-array variable.
-.PP
-Next, any command specified with the \fB\-C\fP option is invoked
-in an environment equivalent to command substitution.
-It should print a list of completions, one per line, to the
-standard output.
-Backslash may be used to escape a newline, if necessary.
-.PP
-After all of the possible completions are generated, any filter
-specified with the \fB\-X\fP option is applied to the list.
-The filter is a pattern as used for pathname expansion; a \fB&\fP
-in the pattern is replaced with the text of the word being completed.
-A literal \fB&\fP may be escaped with a backslash; the backslash
-is removed before attempting a match.
-Any completion that matches the pattern will be removed from the list.
-A leading \fB!\fP negates the pattern; in this case any completion
-not matching the pattern will be removed.
-.PP
-Finally, any prefix and suffix specified with the \fB\-P\fP and \fB\-S\fP
-options are added to each member of the completion list, and the result is
-returned to the readline completion code as the list of possible
-completions.
-.PP
-If the previously-applied actions do not generate any matches, and the
-\fB\-o dirnames\fP option was supplied to \fBcomplete\fP when the
-compspec was defined, directory name completion is attempted.
-.PP
-If the \fB\-o plusdirs\fP option was supplied to \fBcomplete\fP when the
-compspec was defined, directory name completion is attempted and any
-matches are added to the results of the other actions.
-.PP
-By default, if a compspec is found, whatever it generates is returned
-to the completion code as the full set of possible completions.
-The default \fBbash\fP completions are not attempted, and the readline
-default of filename completion is disabled.
-If the \fB\-o bashdefault\fP option was supplied to \fBcomplete\fP when
-the compspec was defined, the \fBbash\fP default completions are attempted
-if the compspec generates no matches.
-If the \fB\-o default\fP option was supplied to \fBcomplete\fP when the
-compspec was defined, readline's default completion will be performed
-if the compspec (and, if attempted, the default \fBbash\fP completions)
-generate no matches.
-.PP
-When a compspec indicates that directory name completion is desired,
-the programmable completion functions force readline to append a slash
-to completed names which are symbolic links to directories, subject to
-the value of the \fBmark\-directories\fP readline variable, regardless
-of the setting of the \fBmark-symlinked\-directories\fP readline variable.
-.PP
-There is some support for dynamically modifying completions. This is
-most useful when used in combination with a default completion specified
-with \fBcomplete -D\fP.
-It's possible for shell functions executed as completion
-handlers to indicate that completion should be retried by returning an
-exit status of 124. If a shell function returns 124, and changes
-the compspec associated with the command on which completion is being
-attempted (supplied as the first argument when the function is executed),
-programmable completion restarts from the beginning, with an
-attempt to find a new compspec for that command. This allows a set of
-completions to be built dynamically as completion is attempted, rather than
-being loaded all at once.
-.PP
-For instance, assuming that there is a library of compspecs, each kept in a
-file corresponding to the name of the command, the following default
-completion function would load completions dynamically:
-.PP
-\f(CW_completion_loader()
-.br
-{
-.br
- . "/etc/bash_completion.d/$1.sh" >/dev/null 2>&1 && return 124
-.br
-}
-.br
-complete -D -F _completion_loader
-.br
-\fP
-.SH HISTORY
-When the
-.B \-o history
-option to the
-.B set
-builtin is enabled, the shell provides access to the
-\fIcommand history\fP,
-the list of commands previously typed.
-The value of the
-.SM
-.B HISTSIZE
-variable is used as the
-number of commands to save in a history list.
-The text of the last
-.SM
-.B HISTSIZE
-commands (default 500) is saved. The shell
-stores each command in the history list prior to parameter and
-variable expansion (see
-.SM
-.B EXPANSION
-above) but after history expansion is performed, subject to the
-values of the shell variables
-.SM
-.B HISTIGNORE
-and
-.SM
-.BR HISTCONTROL .
-.PP
-On startup, the history is initialized from the file named by
-the variable
-.SM
-.B HISTFILE
-(default \fI~/.bash_history\fP).
-The file named by the value of
-.SM
-.B HISTFILE
-is truncated, if necessary, to contain no more than
-the number of lines specified by the value of
-.SM
-.BR HISTFILESIZE .
-When the history file is read,
-lines beginning with the history comment character followed immediately
-by a digit are interpreted as timestamps for the preceding history line.
-These timestamps are optionally displayed depending on the value of the
-.SM
-.B HISTTIMEFORMAT
-variable.
-When an interactive shell exits, the last
-.SM
-.B $HISTSIZE
-lines are copied from the history list to
-.SM
-.BR $HISTFILE .
-If the
-.B histappend
-shell option is enabled
-(see the description of
-.B shopt
-under
-.SM
-.B "SHELL BUILTIN COMMANDS"
-below), the lines are appended to the history file,
-otherwise the history file is overwritten.
-If
-.SM
-.B HISTFILE
-is unset, or if the history file is unwritable, the history is
-not saved.
-If the
-.SM
-.B HISTTIMEFORMAT
-variable is set, time stamps are written to the history file, marked
-with the history comment character, so
-they may be preserved across shell sessions.
-This uses the history comment character to distinguish timestamps from
-other history lines.
-After saving the history, the history file is truncated
-to contain no more than
-.SM
-.B HISTFILESIZE
-lines. If
-.SM
-.B HISTFILESIZE
-is not set, no truncation is performed.
-.PP
-The builtin command
-.B fc
-(see
-.SM
-.B SHELL BUILTIN COMMANDS
-below) may be used to list or edit and re-execute a portion of
-the history list.
-The
-.B history
-builtin may be used to display or modify the history list and
-manipulate the history file.
-When using command-line editing, search commands
-are available in each editing mode that provide access to the
-history list.
-.PP
-The shell allows control over which commands are saved on the history
-list. The
-.SM
-.B HISTCONTROL
-and
-.SM
-.B HISTIGNORE
-variables may be set to cause the shell to save only a subset of the
-commands entered.
-The
-.B cmdhist
-shell option, if enabled, causes the shell to attempt to save each
-line of a multi-line command in the same history entry, adding
-semicolons where necessary to preserve syntactic correctness.
-The
-.B lithist
-shell option causes the shell to save the command with embedded newlines
-instead of semicolons. See the description of the
-.B shopt
-builtin below under
-.SM
-.B "SHELL BUILTIN COMMANDS"
-for information on setting and unsetting shell options.
-.SH "HISTORY EXPANSION"
-.PP
-The shell supports a history expansion feature that
-is similar to the history expansion in
-.BR csh.
-This section describes what syntax features are available. This
-feature is enabled by default for interactive shells, and can be
-disabled using the
-.B \+H
-option to the
-.B set
-builtin command (see
-.SM
-.B SHELL BUILTIN COMMANDS
-below). Non-interactive shells do not perform history expansion
-by default.
-.PP
-History expansions introduce words from the history list into
-the input stream, making it easy to repeat commands, insert the
-arguments to a previous command into the current input line, or
-fix errors in previous commands quickly.
-.PP
-History expansion is performed immediately after a complete line
-is read, before the shell breaks it into words.
-It takes place in two parts.
-The first is to determine which line from the history list
-to use during substitution.
-The second is to select portions of that line for inclusion into
-the current one.
-The line selected from the history is the \fIevent\fP,
-and the portions of that line that are acted upon are \fIwords\fP.
-Various \fImodifiers\fP are available to manipulate the selected words.
-The line is broken into words in the same fashion as when reading input,
-so that several \fImetacharacter\fP-separated words surrounded by
-quotes are considered one word.
-History expansions are introduced by the appearance of the
-history expansion character, which is \^\fB!\fP\^ by default.
-Only backslash (\^\fB\e\fP\^) and single quotes can quote
-the history expansion character.
-.PP
-Several characters inhibit history expansion if found immediately
-following the history expansion character, even if it is unquoted:
-space, tab, newline, carriage return, and \fB=\fP.
-If the \fBextglob\fP shell option is enabled, \fB(\fP will also
-inhibit expansion.
-.PP
-Several shell options settable with the
-.B shopt
-builtin may be used to tailor the behavior of history expansion.
-If the
-.B histverify
-shell option is enabled (see the description of the
-.B shopt
-builtin below), and
-.B readline
-is being used, history substitutions are not immediately passed to
-the shell parser.
-Instead, the expanded line is reloaded into the
-.B readline
-editing buffer for further modification.
-If
-.B readline
-is being used, and the
-.B histreedit
-shell option is enabled, a failed history substitution will be reloaded
-into the
-.B readline
-editing buffer for correction.
-The
-.B \-p
-option to the
-.B history
-builtin command may be used to see what a history expansion will
-do before using it.
-The
-.B \-s
-option to the
-.B history
-builtin may be used to add commands to the end of the history list
-without actually executing them, so that they are available for
-subsequent recall.
-.PP
-The shell allows control of the various characters used by the
-history expansion mechanism (see the description of
-.B histchars
-above under
-.BR "Shell Variables" ).
-The shell uses
-the history comment character to mark history timestamps when
-writing the history file.
-.SS Event Designators
-.PP
-An event designator is a reference to a command line entry in the
-history list.
-Unless the reference is absolute, events are relative to the current
-position in the history list.
-.PP
-.PD 0
-.TP
-.B !
-Start a history substitution, except when followed by a
-.BR blank ,
-newline, carriage return, =
-or ( (when the \fBextglob\fP shell option is enabled using
-the \fBshopt\fP builtin).
-.TP
-.B !\fIn\fR
-Refer to command line
-.IR n .
-.TP
-.B !\-\fIn\fR
-Refer to the current command minus
-.IR n .
-.TP
-.B !!
-Refer to the previous command. This is a synonym for `!\-1'.
-.TP
-.B !\fIstring\fR
-Refer to the most recent command preceding the current position in the
-history list starting with
-.IR string .
-.TP
-.B !?\fIstring\fR\fB[?]\fR
-Refer to the most recent command preceding the current postition in the
-history list containing
-.IR string .
-The trailing \fB?\fP may be omitted if
-.I string
-is followed immediately by a newline.
-.TP
-.B \d\s+2^\s-2\u\fIstring1\fP\d\s+2^\s-2\u\fIstring2\fP\d\s+2^\s-2\u
-Quick substitution. Repeat the previous command, replacing
-.I string1
-with
-.IR string2 .
-Equivalent to
-``!!:s/\fIstring1\fP/\fIstring2\fP/''
-(see \fBModifiers\fP below).
-.TP
-.B !#
-The entire command line typed so far.
-.PD
-.SS Word Designators
-.PP
-Word designators are used to select desired words from the event.
-A
-.B :
-separates the event specification from the word designator.
-It may be omitted if the word designator begins with a
-.BR ^ ,
-.BR $ ,
-.BR * ,
-.BR \- ,
-or
-.BR % .
-Words are numbered from the beginning of the line,
-with the first word being denoted by 0 (zero).
-Words are inserted into the current line separated by single spaces.
-.PP
-.PD 0
-.TP
-.B 0 (zero)
-The zeroth word. For the shell, this is the command
-word.
-.TP
-.I n
-The \fIn\fRth word.
-.TP
-.B ^
-The first argument. That is, word 1.
-.TP
-.B $
-The last argument.
-.TP
-.B %
-The word matched by the most recent `?\fIstring\fR?' search.
-.TP
-.I x\fB\-\fPy
-A range of words; `\-\fIy\fR' abbreviates `0\-\fIy\fR'.
-.TP
-.B *
-All of the words but the zeroth. This is a synonym
-for `\fI1\-$\fP'. It is not an error to use
-.B *
-if there is just one
-word in the event; the empty string is returned in that case.
-.TP
-.B x*
-Abbreviates \fIx\-$\fP.
-.TP
-.B x\-
-Abbreviates \fIx\-$\fP like \fBx*\fP, but omits the last word.
-.PD
-.PP
-If a word designator is supplied without an event specification, the
-previous command is used as the event.
-.SS Modifiers
-.PP
-After the optional word designator, there may appear a sequence of
-one or more of the following modifiers, each preceded by a `:'.
-.PP
-.PD 0
-.PP
-.TP
-.B h
-Remove a trailing file name component, leaving only the head.
-.TP
-.B t
-Remove all leading file name components, leaving the tail.
-.TP
-.B r
-Remove a trailing suffix of the form \fI.xxx\fP, leaving the
-basename.
-.TP
-.B e
-Remove all but the trailing suffix.
-.TP
-.B p
-Print the new command but do not execute it.
-.TP
-.B q
-Quote the substituted words, escaping further substitutions.
-.TP
-.B x
-Quote the substituted words as with
-.BR q ,
-but break into words at
-.B blanks
-and newlines.
-.TP
-.B s/\fIold\fP/\fInew\fP/
-Substitute
-.I new
-for the first occurrence of
-.I old
-in the event line. Any delimiter can be used in place of /. The
-final delimiter is optional if it is the last character of the
-event line. The delimiter may be quoted in
-.I old
-and
-.I new
-with a single backslash. If & appears in
-.IR new ,
-it is replaced by
-.IR old .
-A single backslash will quote the &. If
-.I old
-is null, it is set to the last
-.I old
-substituted, or, if no previous history substitutions took place,
-the last
-.I string
-in a
-.B !?\fIstring\fR\fB[?]\fR
-search.
-.TP
-.B &
-Repeat the previous substitution.
-.TP
-.B g
-Cause changes to be applied over the entire event line. This is
-used in conjunction with `\fB:s\fP' (e.g., `\fB:gs/\fIold\fP/\fInew\fP/\fR')
-or `\fB:&\fP'. If used with
-`\fB:s\fP', any delimiter can be used
-in place of /, and the final delimiter is optional
-if it is the last character of the event line.
-An \fBa\fP may be used as a synonym for \fBg\fP.
-.TP
-.B G
-Apply the following `\fBs\fP' modifier once to each word in the event line.
-.PD
-.SH "SHELL BUILTIN COMMANDS"
-.\" start of bash_builtins
-.zZ
-.PP
-Unless otherwise noted, each builtin command documented in this
-section as accepting options preceded by
-.B \-
-accepts
-.B \-\-
-to signify the end of the options.
-The \fB:\fP, \fBtrue\fP, \fBfalse\fP, and \fBtest\fP builtins
-do not accept options and do not treat \fB\-\-\fP specially.
-The \fBexit\fP, \fBlogout\fP, \fBbreak\fP, \fBcontinue\fP, \fBlet\fP,
-and \fBshift\fP builtins accept and process arguments beginning with
-\fB\-\fP without requiring \fB\-\-\fP.
-Other builtins that accept arguments but are not specified as accepting
-options interpret arguments beginning with \fB\-\fP as invalid options and
-require \fB\-\-\fP to prevent this interpretation.
-.sp .5
-.PD 0
-.TP
-\fB:\fP [\fIarguments\fP]
-.PD
-No effect; the command does nothing beyond expanding
-.I arguments
-and performing any specified
-redirections. A zero exit code is returned.
-.TP
-\fB .\| \fP \fIfilename\fP [\fIarguments\fP]
-.PD 0
-.TP
-\fBsource\fP \fIfilename\fP [\fIarguments\fP]
-.PD
-Read and execute commands from
-.I filename
-in the current
-shell environment and return the exit status of the last command
-executed from
-.IR filename .
-If
-.I filename
-does not contain a slash, file names in
-.SM
-.B PATH
-are used to find the directory containing
-.IR filename .
-The file searched for in
-.SM
-.B PATH
-need not be executable.
-When \fBbash\fP is not in \fIposix mode\fP, the current directory is
-searched if no file is found in
-.SM
-.BR PATH .
-If the
-.B sourcepath
-option to the
-.B shopt
-builtin command is turned off, the
-.SM
-.B PATH
-is not searched.
-If any \fIarguments\fP are supplied, they become the positional
-parameters when \fIfilename\fP is executed. Otherwise the positional
-parameters are unchanged.
-The return status is the status of the last command exited within
-the script (0 if no commands are executed), and false if
-.I filename
-is not found or cannot be read.
-.TP
-\fBalias\fP [\fB\-p\fP] [\fIname\fP[=\fIvalue\fP] ...]
-\fBAlias\fP with no arguments or with the
-.B \-p
-option prints the list of aliases in the form
-\fBalias\fP \fIname\fP=\fIvalue\fP on standard output.
-When arguments are supplied, an alias is defined for
-each \fIname\fP whose \fIvalue\fP is given.
-A trailing space in \fIvalue\fP causes the next word to be
-checked for alias substitution when the alias is expanded.
-For each \fIname\fP in the argument list for which no \fIvalue\fP
-is supplied, the name and value of the alias is printed.
-\fBAlias\fP returns true unless a \fIname\fP is given for which
-no alias has been defined.
-.TP
-\fBbg\fP [\fIjobspec\fP ...]
-Resume each suspended job \fIjobspec\fP in the background, as if it
-had been started with
-.BR & .
-If
-.I jobspec
-is not present, the shell's notion of the \fIcurrent job\fP is used.
-.B bg
-.I jobspec
-returns 0 unless run when job control is disabled or, when run with
-job control enabled, any specified \fIjobspec\fP was not found
-or was started without job control.
-.TP
-\fBbind\fP [\fB\-m\fP \fIkeymap\fP] [\fB\-lpsvPSV\fP]
-.PD 0
-.TP
-\fBbind\fP [\fB\-m\fP \fIkeymap\fP] [\fB\-q\fP \fIfunction\fP] [\fB\-u\fP \fIfunction\fP] [\fB\-r\fP \fIkeyseq\fP]
-.TP
-\fBbind\fP [\fB\-m\fP \fIkeymap\fP] \fB\-f\fP \fIfilename\fP
-.TP
-\fBbind\fP [\fB\-m\fP \fIkeymap\fP] \fB\-x\fP \fIkeyseq\fP:\fIshell\-command\fP
-.TP
-\fBbind\fP [\fB\-m\fP \fIkeymap\fP] \fIkeyseq\fP:\fIfunction\-name\fP
-.TP
-\fBbind\fP \fIreadline\-command\fP
-.PD
-Display current
-.B readline
-key and function bindings, bind a key sequence to a
-.B readline
-function or macro, or set a
-.B readline
-variable.
-Each non-option argument is a command as it would appear in
-.IR .inputrc ,
-but each binding or command must be passed as a separate argument;
-e.g., '"\eC\-x\eC\-r": re\-read\-init\-file'.
-Options, if supplied, have the following meanings:
-.RS
-.PD 0
-.TP
-.B \-m \fIkeymap\fP
-Use
-.I keymap
-as the keymap to be affected by the subsequent bindings.
-Acceptable
-.I keymap
-names are
-\fIemacs, emacs\-standard, emacs\-meta, emacs\-ctlx, vi,
-vi\-move, vi\-command\fP, and
-.IR vi\-insert .
-\fIvi\fP is equivalent to \fIvi\-command\fP; \fIemacs\fP is
-equivalent to \fIemacs\-standard\fP.
-.TP
-.B \-l
-List the names of all \fBreadline\fP functions.
-.TP
-.B \-p
-Display \fBreadline\fP function names and bindings in such a way
-that they can be re-read.
-.TP
-.B \-P
-List current \fBreadline\fP function names and bindings.
-.TP
-.B \-s
-Display \fBreadline\fP key sequences bound to macros and the strings
-they output in such a way that they can be re-read.
-.TP
-.B \-S
-Display \fBreadline\fP key sequences bound to macros and the strings
-they output.
-.TP
-.B \-v
-Display \fBreadline\fP variable names and values in such a way that they
-can be re-read.
-.TP
-.B \-V
-List current \fBreadline\fP variable names and values.
-.TP
-.B \-f \fIfilename\fP
-Read key bindings from \fIfilename\fP.
-.TP
-.B \-q \fIfunction\fP
-Query about which keys invoke the named \fIfunction\fP.
-.TP
-.B \-u \fIfunction\fP
-Unbind all keys bound to the named \fIfunction\fP.
-.TP
-.B \-r \fIkeyseq\fP
-Remove any current binding for \fIkeyseq\fP.
-.TP
-.B \-x \fIkeyseq\fP:\fIshell\-command\fP
-Cause \fIshell\-command\fP to be executed whenever \fIkeyseq\fP is
-entered.
-When \fIshell\-command\fP is executed, the shell sets the
-.SM
-.B READLINE_LINE
-variable to the contents of the \fBreadline\fP line buffer and the
-.SM
-.B READLINE_POINT
-variable to the current location of the insertion point.
-If the executed command changes the value of
-.SM
-.B READLINE_LINE
-or
-.SM
-.BR READLINE_POINT ,
-those new values will be reflected in the editing state.
-.PD
-.PP
-The return value is 0 unless an unrecognized option is given or an
-error occurred.
-.RE
-.TP
-\fBbreak\fP [\fIn\fP]
-Exit from within a
-.BR for ,
-.BR while ,
-.BR until ,
-or
-.B select
-loop. If \fIn\fP is specified, break \fIn\fP levels.
-.I n
-must be \(>= 1. If
-.I n
-is greater than the number of enclosing loops, all enclosing loops
-are exited.
-The return value is 0 unless \fIn\fP is not greater than or equal to 1.
-.TP
-\fBbuiltin\fP \fIshell\-builtin\fP [\fIarguments\fP]
-Execute the specified shell builtin, passing it
-.IR arguments ,
-and return its exit status.
-This is useful when defining a
-function whose name is the same as a shell builtin,
-retaining the functionality of the builtin within the function.
-The \fBcd\fP builtin is commonly redefined this way.
-The return status is false if
-.I shell\-builtin
-is not a shell builtin command.
-.TP
-\fBcaller\fP [\fIexpr\fP]
-Returns the context of any active subroutine call (a shell function or
-a script executed with the \fB.\fP or \fBsource\fP builtins).
-Without \fIexpr\fP, \fBcaller\fP displays the line number and source
-filename of the current subroutine call.
-If a non-negative integer is supplied as \fIexpr\fP, \fBcaller\fP
-displays the line number, subroutine name, and source file corresponding
-to that position in the current execution call stack. This extra
-information may be used, for example, to print a stack trace. The
-current frame is frame 0.
-The return value is 0 unless the shell is not executing a subroutine
-call or \fIexpr\fP does not correspond to a valid position in the
-call stack.
-.TP
-\fBcd\fP [\fB\-L\fP|[\fB\-P\fP [\fB\-e\fP]]] [\fIdir\fP]
-Change the current directory to \fIdir\fP. The variable
-.SM
-.B HOME
-is the
-default
-.IR dir .
-The variable
-.SM
-.B CDPATH
-defines the search path for the directory containing
-.IR dir .
-Alternative directory names in
-.SM
-.B CDPATH
-are separated by a colon (:). A null directory name in
-.SM
-.B CDPATH
-is the same as the current directory, i.e., ``\fB.\fP''. If
-.I dir
-begins with a slash (/),
-then
-.SM
-.B CDPATH
-is not used. The
-.B \-P
-option says to use the physical directory structure instead of
-following symbolic links (see also the
-.B \-P
-option to the
-.B set
-builtin command); the
-.B \-L
-option forces symbolic links to be followed.
-If the
-.B \-e
-option is supplied with
-.BR \-P ,
-and the current working directory cannot be successfully determined
-after a successful directory change, \fBcd\fP will return an unsuccessful
-status.
-An argument of
-.B \-
-is equivalent to
-.SM
-.BR $OLDPWD .
-If a non-empty directory name from
-.SM
-.B CDPATH
-is used, or if
-\fB\-\fP is the first argument, and the directory change is
-successful, the absolute pathname of the new working directory is
-written to the standard output.
-The return value is true if the directory was successfully changed;
-false otherwise.
-.TP
-\fBcommand\fP [\fB\-pVv\fP] \fIcommand\fP [\fIarg\fP ...]
-Run
-.I command
-with
-.I args
-suppressing the normal shell function lookup. Only builtin
-commands or commands found in the
-.SM
-.B PATH
-are executed. If the
-.B \-p
-option is given, the search for
-.I command
-is performed using a default value for
-.SM
-.B PATH
-that is guaranteed to find all of the standard utilities.
-If either the
-.B \-V
-or
-.B \-v
-option is supplied, a description of
-.I command
-is printed. The
-.B \-v
-option causes a single word indicating the command or file name
-used to invoke
-.I command
-to be displayed; the
-.B \-V
-option produces a more verbose description.
-If the
-.B \-V
-or
-.B \-v
-option is supplied, the exit status is 0 if
-.I command
-was found, and 1 if not. If neither option is supplied and
-an error occurred or
-.I command
-cannot be found, the exit status is 127. Otherwise, the exit status of the
-.B command
-builtin is the exit status of
-.IR command .
-.TP
-\fBcompgen\fP [\fIoption\fP] [\fIword\fP]
-Generate possible completion matches for \fIword\fP according to
-the \fIoption\fPs, which may be any option accepted by the
-.B complete
-builtin with the exception of \fB\-p\fP and \fB\-r\fP, and write
-the matches to the standard output.
-When using the \fB\-F\fP or \fB\-C\fP options, the various shell variables
-set by the programmable completion facilities, while available, will not
-have useful values.
-.sp 1
-The matches will be generated in the same way as if the programmable
-completion code had generated them directly from a completion specification
-with the same flags.
-If \fIword\fP is specified, only those completions matching \fIword\fP
-will be displayed.
-.sp 1
-The return value is true unless an invalid option is supplied, or no
-matches were generated.
-.TP
-\fBcomplete\fP [\fB\-abcdefgjksuv\fP] [\fB\-o\fP \fIcomp-option\fP] [\fB\-DE\fP] [\fB\-A\fP \fIaction\fP] [\fB\-G\fP \fIglobpat\fP] [\fB\-W\fP \fIwordlist\fP] [\fB\-F\fP \fIfunction\fP] [\fB\-C\fP \fIcommand\fP]
-.br
-[\fB\-X\fP \fIfilterpat\fP] [\fB\-P\fP \fIprefix\fP] [\fB\-S\fP \fIsuffix\fP] \fIname\fP [\fIname ...\fP]
-.PD 0
-.TP
-\fBcomplete\fP \fB\-pr\fP [\fB\-DE\fP] [\fIname\fP ...]
-.PD
-Specify how arguments to each \fIname\fP should be completed.
-If the \fB\-p\fP option is supplied, or if no options are supplied,
-existing completion specifications are printed in a way that allows
-them to be reused as input.
-The \fB\-r\fP option removes a completion specification for
-each \fIname\fP, or, if no \fIname\fPs are supplied, all
-completion specifications.
-The \fB\-D\fP option indicates that the remaining options and actions should
-apply to the ``default'' command completion; that is, completion attempted
-on a command for which no completion has previously been defined.
-The \fB\-E\fP option indicates that the remaining options and actions should
-apply to ``empty'' command completion; that is, completion attempted on a
-blank line.
-.sp 1
-The process of applying these completion specifications when word completion
-is attempted is described above under \fBProgrammable Completion\fP.
-.sp 1
-Other options, if specified, have the following meanings.
-The arguments to the \fB\-G\fP, \fB\-W\fP, and \fB\-X\fP options
-(and, if necessary, the \fB\-P\fP and \fB\-S\fP options)
-should be quoted to protect them from expansion before the
-.B complete
-builtin is invoked.
-.RS
-.PD 0
-.TP 8
-\fB\-o\fP \fIcomp-option\fP
-The \fIcomp-option\fP controls several aspects of the compspec's behavior
-beyond the simple generation of completions.
-\fIcomp-option\fP may be one of:
-.RS
-.TP 8
-.B bashdefault
-Perform the rest of the default \fBbash\fP completions if the compspec
-generates no matches.
-.TP 8
-.B default
-Use readline's default filename completion if the compspec generates
-no matches.
-.TP 8
-.B dirnames
-Perform directory name completion if the compspec generates no matches.
-.TP 8
-.B filenames
-Tell readline that the compspec generates filenames, so it can perform any
-filename\-specific processing (like adding a slash to directory names,
-quoting special characters, or suppressing trailing spaces).
-Intended to be used with shell functions.
-.TP 8
-.B nospace
-Tell readline not to append a space (the default) to words completed at
-the end of the line.
-.TP 8
-.B plusdirs
-After any matches defined by the compspec are generated,
-directory name completion is attempted and any
-matches are added to the results of the other actions.
-.RE
-.TP 8
-\fB\-A\fP \fIaction\fP
-The \fIaction\fP may be one of the following to generate a list of possible
-completions:
-.RS
-.TP 8
-.B alias
-Alias names. May also be specified as \fB\-a\fP.
-.TP 8
-.B arrayvar
-Array variable names.
-.TP 8
-.B binding
-\fBReadline\fP key binding names.
-.TP 8
-.B builtin
-Names of shell builtin commands. May also be specified as \fB\-b\fP.
-.TP 8
-.B command
-Command names. May also be specified as \fB\-c\fP.
-.TP 8
-.B directory
-Directory names. May also be specified as \fB\-d\fP.
-.TP 8
-.B disabled
-Names of disabled shell builtins.
-.TP 8
-.B enabled
-Names of enabled shell builtins.
-.TP 8
-.B export
-Names of exported shell variables. May also be specified as \fB\-e\fP.
-.TP 8
-.B file
-File names. May also be specified as \fB\-f\fP.
-.TP 8
-.B function
-Names of shell functions.
-.TP 8
-.B group
-Group names. May also be specified as \fB\-g\fP.
-.TP 8
-.B helptopic
-Help topics as accepted by the \fBhelp\fP builtin.
-.TP 8
-.B hostname
-Hostnames, as taken from the file specified by the
-.SM
-.B HOSTFILE
-shell variable.
-.TP 8
-.B job
-Job names, if job control is active. May also be specified as \fB\-j\fP.
-.TP 8
-.B keyword
-Shell reserved words. May also be specified as \fB\-k\fP.
-.TP 8
-.B running
-Names of running jobs, if job control is active.
-.TP 8
-.B service
-Service names. May also be specified as \fB\-s\fP.
-.TP 8
-.B setopt
-Valid arguments for the \fB\-o\fP option to the \fBset\fP builtin.
-.TP 8
-.B shopt
-Shell option names as accepted by the \fBshopt\fP builtin.
-.TP 8
-.B signal
-Signal names.
-.TP 8
-.B stopped
-Names of stopped jobs, if job control is active.
-.TP 8
-.B user
-User names. May also be specified as \fB\-u\fP.
-.TP 8
-.B variable
-Names of all shell variables. May also be specified as \fB\-v\fP.
-.RE
-.TP 8
-\fB\-C\fP \fIcommand\fP
-\fIcommand\fP is executed in a subshell environment, and its output is
-used as the possible completions.
-.TP 8
-\fB\-F\fP \fIfunction\fP
-The shell function \fIfunction\fP is executed in the current shell
-environment.
-When it finishes, the possible completions are retrieved from the value
-of the
-.SM
-.B COMPREPLY
-array variable.
-.TP 8
-\fB\-G\fP \fIglobpat\fP
-The pathname expansion pattern \fIglobpat\fP is expanded to generate
-the possible completions.
-.TP 8
-\fB\-P\fP \fIprefix\fP
-\fIprefix\fP is added at the beginning of each possible completion
-after all other options have been applied.
-.TP 8
-\fB\-S\fP \fIsuffix\fP
-\fIsuffix\fP is appended to each possible completion
-after all other options have been applied.
-.TP 8
-\fB\-W\fP \fIwordlist\fP
-The \fIwordlist\fP is split using the characters in the
-.SM
-.B IFS
-special variable as delimiters, and each resultant word is expanded.
-The possible completions are the members of the resultant list which
-match the word being completed.
-.TP 8
-\fB\-X\fP \fIfilterpat\fP
-\fIfilterpat\fP is a pattern as used for pathname expansion.
-It is applied to the list of possible completions generated by the
-preceding options and arguments, and each completion matching
-\fIfilterpat\fP is removed from the list.
-A leading \fB!\fP in \fIfilterpat\fP negates the pattern; in this
-case, any completion not matching \fIfilterpat\fP is removed.
-.PD
-.PP
-The return value is true unless an invalid option is supplied, an option
-other than \fB\-p\fP or \fB\-r\fP is supplied without a \fIname\fP
-argument, an attempt is made to remove a completion specification for
-a \fIname\fP for which no specification exists, or
-an error occurs adding a completion specification.
-.RE
-.TP
-\fBcompopt\fP [\fB\-o\fP \fIoption\fP] [\fB\-DE\fP] [\fB+o\fP \fIoption\fP] [\fIname\fP]
-Modify completion options for each \fIname\fP according to the
-\fIoption\fPs, or for the
-currently-executing completion if no \fIname\fPs are supplied.
-If no \fIoption\fPs are given, display the completion options for each
-\fIname\fP or the current completion.
-The possible values of \fIoption\fP are those valid for the \fBcomplete\fP
-builtin described above.
-The \fB\-D\fP option indicates that the remaining options should
-apply to the ``default'' command completion; that is, completion attempted
-on a command for which no completion has previously been defined.
-The \fB\-E\fP option indicates that the remaining options should
-apply to ``empty'' command completion; that is, completion attempted on a
-blank line.
-.sp 1
-The return value is true unless an invalid option is supplied, an attempt
-is made to modify the options for a \fIname\fP for which no completion
-specification exists, or an output error occurs.
-.TP
-\fBcontinue\fP [\fIn\fP]
-Resume the next iteration of the enclosing
-.BR for ,
-.BR while ,
-.BR until ,
-or
-.B select
-loop.
-If
-.I n
-is specified, resume at the \fIn\fPth enclosing loop.
-.I n
-must be \(>= 1. If
-.I n
-is greater than the number of enclosing loops, the last enclosing loop
-(the ``top-level'' loop) is resumed.
-The return value is 0 unless \fIn\fP is not greater than or equal to 1.
-.TP
-\fBdeclare\fP [\fB\-aAfFgilrtux\fP] [\fB\-p\fP] [\fIname\fP[=\fIvalue\fP] ...]
-.PD 0
-.TP
-\fBtypeset\fP [\fB\-aAfFgilrtux\fP] [\fB\-p\fP] [\fIname\fP[=\fIvalue\fP] ...]
-.PD
-Declare variables and/or give them attributes.
-If no \fIname\fPs are given then display the values of variables.
-The
-.B \-p
-option will display the attributes and values of each
-.IR name .
-When
-.B \-p
-is used with \fIname\fP arguments, additional options are ignored.
-When
-.B \-p
-is supplied without \fIname\fP arguments, it will display the attributes
-and values of all variables having the attributes specified by the
-additional options.
-If no other options are supplied with \fB\-p\fP, \fBdeclare\fP will display
-the attributes and values of all shell variables. The \fB\-f\fP option
-will restrict the display to shell functions.
-The
-.B \-F
-option inhibits the display of function definitions; only the
-function name and attributes are printed.
-If the \fBextdebug\fP shell option is enabled using \fBshopt\fP,
-the source file name and line number where the function is defined
-are displayed as well. The
-.B \-F
-option implies
-.BR \-f .
-The
-.B \-g
-option forces variables to be created or modified at the global scope,
-even when \fBdeclare\fP is executed in a shell function.
-It is ignored in all other cases.
-The following options can
-be used to restrict output to variables with the specified attribute or
-to give variables attributes:
-.RS
-.PD 0
-.TP
-.B \-a
-Each \fIname\fP is an indexed array variable (see
-.B Arrays
-above).
-.TP
-.B \-A
-Each \fIname\fP is an associative array variable (see
-.B Arrays
-above).
-.TP
-.B \-f
-Use function names only.
-.TP
-.B \-i
-The variable is treated as an integer; arithmetic evaluation (see
-.SM
-.B "ARITHMETIC EVALUATION"
-above) is performed when the variable is assigned a value.
-.TP
-.B \-l
-When the variable is assigned a value, all upper-case characters are
-converted to lower-case.
-The upper-case attribute is disabled.
-.TP
-.B \-r
-Make \fIname\fPs readonly. These names cannot then be assigned values
-by subsequent assignment statements or unset.
-.TP
-.B \-t
-Give each \fIname\fP the \fItrace\fP attribute.
-Traced functions inherit the \fBDEBUG\fP and \fBRETURN\fP traps from
-the calling shell.
-The trace attribute has no special meaning for variables.
-.TP
-.B \-u
-When the variable is assigned a value, all lower-case characters are
-converted to upper-case.
-The lower-case attribute is disabled.
-.TP
-.B \-x
-Mark \fIname\fPs for export to subsequent commands via the environment.
-.PD
-.PP
-Using `+' instead of `\-'
-turns off the attribute instead,
-with the exceptions that \fB+a\fP
-may not be used to destroy an array variable and \fB+r\fP will not
-remove the readonly attribute.
-When used in a function, makes each
-\fIname\fP local, as with the
-.B local
-command,
-unless the \fB\-g\fP option is supplied,
-If a variable name is followed by =\fIvalue\fP, the value of
-the variable is set to \fIvalue\fP.
-The return value is 0 unless an invalid option is encountered,
-an attempt is made to define a function using
-.if n ``\-f foo=bar'',
-.if t \f(CW\-f foo=bar\fP,
-an attempt is made to assign a value to a readonly variable,
-an attempt is made to assign a value to an array variable without
-using the compound assignment syntax (see
-.B Arrays
-above), one of the \fInames\fP is not a valid shell variable name,
-an attempt is made to turn off readonly status for a readonly variable,
-an attempt is made to turn off array status for an array variable,
-or an attempt is made to display a non-existent function with \fB\-f\fP.
-.RE
-.TP
-.B dirs [+\fIn\fP] [\-\fIn\fP] [\fB\-clpv\fP]
-Without options, displays the list of currently remembered directories.
-The default display is on a single line with directory names separated
-by spaces.
-Directories are added to the list with the
-.B pushd
-command; the
-.B popd
-command removes entries from the list.
-.RS
-.PD 0
-.TP
-\fB+\fP\fIn\fP
-Displays the \fIn\fPth entry counting from the left of the list
-shown by
-.B dirs
-when invoked without options, starting with zero.
-.TP
-\fB\-\fP\fIn\fP
-Displays the \fIn\fPth entry counting from the right of the list
-shown by
-.B dirs
-when invoked without options, starting with zero.
-.TP
-.B \-c
-Clears the directory stack by deleting all of the entries.
-.TP
-.B \-l
-Produces a longer listing; the default listing format uses a
-tilde to denote the home directory.
-.TP
-.B \-p
-Print the directory stack with one entry per line.
-.TP
-.B \-v
-Print the directory stack with one entry per line,
-prefixing each entry with its index in the stack.
-.PD
-.PP
-The return value is 0 unless an
-invalid option is supplied or \fIn\fP indexes beyond the end
-of the directory stack.
-.RE
-.TP
-\fBdisown\fP [\fB\-ar\fP] [\fB\-h\fP] [\fIjobspec\fP ...]
-Without options, each
-.I jobspec
-is removed from the table of active jobs.
-If
-.I jobspec
-is not present, and neither \fB\-a\fP nor \fB\-r\fP is supplied,
-the shell's notion of the \fIcurrent job\fP is used.
-If the \fB\-h\fP option is given, each
-.I jobspec
-is not removed from the table, but is marked so that
-.SM
-.B SIGHUP
-is not sent to the job if the shell receives a
-.SM
-.BR SIGHUP .
-If no
-.I jobspec
-is present, and neither the
-.B \-a
-nor the
-.B \-r
-option is supplied, the \fIcurrent job\fP is used.
-If no
-.I jobspec
-is supplied, the
-.B \-a
-option means to remove or mark all jobs; the
-.B \-r
-option without a
-.I jobspec
-argument restricts operation to running jobs.
-The return value is 0 unless a
-.I jobspec
-does not specify a valid job.
-.TP
-\fBecho\fP [\fB\-neE\fP] [\fIarg\fP ...]
-Output the \fIarg\fPs, separated by spaces, followed by a newline.
-The return status is 0 unless a write error occurs.
-If \fB\-n\fP is specified, the trailing newline is
-suppressed. If the \fB\-e\fP option is given, interpretation of
-the following backslash-escaped characters is enabled. The
-.B \-E
-option disables the interpretation of these escape characters,
-even on systems where they are interpreted by default.
-The \fBxpg_echo\fP shell option may be used to
-dynamically determine whether or not \fBecho\fP expands these
-escape characters by default.
-.B echo
-does not interpret \fB\-\-\fP to mean the end of options.
-.B echo
-interprets the following escape sequences:
-.RS
-.PD 0
-.TP
-.B \ea
-alert (bell)
-.TP
-.B \eb
-backspace
-.TP
-.B \ec
-suppress further output
-.TP
-.B \ee
-.TP
-.B \eE
-an escape character
-.TP
-.B \ef
-form feed
-.TP
-.B \en
-new line
-.TP
-.B \er
-carriage return
-.TP
-.B \et
-horizontal tab
-.TP
-.B \ev
-vertical tab
-.TP
-.B \e\e
-backslash
-.TP
-.B \e0\fInnn\fP
-the eight-bit character whose value is the octal value \fInnn\fP
-(zero to three octal digits)
-.TP
-.B \ex\fIHH\fP
-the eight-bit character whose value is the hexadecimal value \fIHH\fP
-(one or two hex digits)
-.TP
-.B \eu\fIHHHH\fP
-the Unicode (ISO/IEC 10646) character whose value is the hexadecimal value
-\fIHHHH\fP (one to four hex digits)
-.TP
-.B \eU\fIHHHHHHHH\fP
-the Unicode (ISO/IEC 10646) character whose value is the hexadecimal value
-\fIHHHHHHHH\fP (one to eight hex digits)
-.PD
-.RE
-.TP
-\fBenable\fP [\fB\-a\fP] [\fB\-dnps\fP] [\fB\-f\fP \fIfilename\fP] [\fIname\fP ...]
-Enable and disable builtin shell commands.
-Disabling a builtin allows a disk command which has the same name
-as a shell builtin to be executed without specifying a full pathname,
-even though the shell normally searches for builtins before disk commands.
-If \fB\-n\fP is used, each \fIname\fP
-is disabled; otherwise,
-\fInames\fP are enabled. For example, to use the
-.B test
-binary found via the
-.SM
-.B PATH
-instead of the shell builtin version, run
-.if t \f(CWenable -n test\fP.
-.if n ``enable -n test''.
-The
-.B \-f
-option means to load the new builtin command
-.I name
-from shared object
-.IR filename ,
-on systems that support dynamic loading. The
-.B \-d
-option will delete a builtin previously loaded with
-.BR \-f .
-If no \fIname\fP arguments are given, or if the
-.B \-p
-option is supplied, a list of shell builtins is printed.
-With no other option arguments, the list consists of all enabled
-shell builtins.
-If \fB\-n\fP is supplied, only disabled builtins are printed.
-If \fB\-a\fP is supplied, the list printed includes all builtins, with an
-indication of whether or not each is enabled.
-If \fB\-s\fP is supplied, the output is restricted to the POSIX
-\fIspecial\fP builtins.
-The return value is 0 unless a
-.I name
-is not a shell builtin or there is an error loading a new builtin
-from a shared object.
-.TP
-\fBeval\fP [\fIarg\fP ...]
-The \fIarg\fPs are read and concatenated together into a single
-command. This command is then read and executed by the shell, and
-its exit status is returned as the value of
-.BR eval .
-If there are no
-.IR args ,
-or only null arguments,
-.B eval
-returns 0.
-.TP
-\fBexec\fP [\fB\-cl\fP] [\fB\-a\fP \fIname\fP] [\fIcommand\fP [\fIarguments\fP]]
-If
-.I command
-is specified, it replaces the shell.
-No new process is created. The
-.I arguments
-become the arguments to \fIcommand\fP.
-If the
-.B \-l
-option is supplied,
-the shell places a dash at the beginning of the zeroth argument passed to
-.IR command .
-This is what
-.IR login (1)
-does. The
-.B \-c
-option causes
-.I command
-to be executed with an empty environment. If
-.B \-a
-is supplied, the shell passes
-.I name
-as the zeroth argument to the executed command. If
-.I command
-cannot be executed for some reason, a non-interactive shell exits,
-unless the shell option
-.B execfail
-is enabled, in which case it returns failure.
-An interactive shell returns failure if the file cannot be executed.
-If
-.I command
-is not specified, any redirections take effect in the current shell,
-and the return status is 0. If there is a redirection error, the
-return status is 1.
-.TP
-\fBexit\fP [\fIn\fP]
-Cause the shell to exit
-with a status of \fIn\fP. If
-.I n
-is omitted, the exit status
-is that of the last command executed.
-A trap on
-.SM
-.B EXIT
-is executed before the shell terminates.
-.TP
-\fBexport\fP [\fB\-fn\fP\^] [\fIname\fP[=\fIword\fP]] ...
-.PD 0
-.TP
-.B export \-p
-.PD
-The supplied
-.I names
-are marked for automatic export to the environment of
-subsequently executed commands. If the
-.B \-f
-option is given,
-the
-.I names
-refer to functions.
-If no
-.I names
-are given, or if the
-.B \-p
-option is supplied, a list
-of all names that are exported in this shell is printed.
-The
-.B \-n
-option causes the export property to be removed from each
-\fIname\fP.
-If a variable name is followed by =\fIword\fP, the value of
-the variable is set to \fIword\fP.
-.B export
-returns an exit status of 0 unless an invalid option is
-encountered,
-one of the \fInames\fP is not a valid shell variable name, or
-.B \-f
-is supplied with a
-.I name
-that is not a function.
-.TP
-\fBfc\fP [\fB\-e\fP \fIename\fP] [\fB\-lnr\fP] [\fIfirst\fP] [\fIlast\fP]
-.PD 0
-.TP
-\fBfc\fP \fB\-s\fP [\fIpat\fP=\fIrep\fP] [\fIcmd\fP]
-.PD
-Fix Command. In the first form, a range of commands from
-.I first
-to
-.I last
-is selected from the history list.
-.I First
-and
-.I last
-may be specified as a string (to locate the last command beginning
-with that string) or as a number (an index into the history list,
-where a negative number is used as an offset from the current
-command number). If
-.I last
-is not specified it is set to
-the current command for listing (so that
-.if n ``fc \-l \-10''
-.if t \f(CWfc \-l \-10\fP
-prints the last 10 commands) and to
-.I first
-otherwise.
-If
-.I first
-is not specified it is set to the previous
-command for editing and \-16 for listing.
-.sp 1
-The
-.B \-n
-option suppresses
-the command numbers when listing. The
-.B \-r
-option reverses the order of
-the commands. If the
-.B \-l
-option is given,
-the commands are listed on
-standard output. Otherwise, the editor given by
-.I ename
-is invoked
-on a file containing those commands. If
-.I ename
-is not given, the
-value of the
-.SM
-.B FCEDIT
-variable is used, and
-the value of
-.SM
-.B EDITOR
-if
-.SM
-.B FCEDIT
-is not set. If neither variable is set,
-.FN vi
-is used. When editing is complete, the edited commands are
-echoed and executed.
-.sp 1
-In the second form, \fIcommand\fP is re-executed after each instance
-of \fIpat\fP is replaced by \fIrep\fP.
-A useful alias to use with this is
-.if n ``r="fc -s"'',
-.if t \f(CWr='fc \-s'\fP,
-so that typing
-.if n ``r cc''
-.if t \f(CWr cc\fP
-runs the last command beginning with
-.if n ``cc''
-.if t \f(CWcc\fP
-and typing
-.if n ``r''
-.if t \f(CWr\fP
-re-executes the last command.
-.sp 1
-If the first form is used, the return value is 0 unless an invalid
-option is encountered or
-.I first
-or
-.I last
-specify history lines out of range.
-If the
-.B \-e
-option is supplied, the return value is the value of the last
-command executed or failure if an error occurs with the temporary
-file of commands. If the second form is used, the return status
-is that of the command re-executed, unless
-.I cmd
-does not specify a valid history line, in which case
-.B fc
-returns failure.
-.TP
-\fBfg\fP [\fIjobspec\fP]
-Resume
-.I jobspec
-in the foreground, and make it the current job.
-If
-.I jobspec
-is not present, the shell's notion of the \fIcurrent job\fP is used.
-The return value is that of the command placed into the foreground,
-or failure if run when job control is disabled or, when run with
-job control enabled, if
-.I jobspec
-does not specify a valid job or
-.I jobspec
-specifies a job that was started without job control.
-.TP
-\fBgetopts\fP \fIoptstring\fP \fIname\fP [\fIargs\fP]
-.B getopts
-is used by shell procedures to parse positional parameters.
-.I optstring
-contains the option characters to be recognized; if a character
-is followed by a colon, the option is expected to have an
-argument, which should be separated from it by white space.
-The colon and question mark characters may not be used as
-option characters.
-Each time it is invoked,
-.B getopts
-places the next option in the shell variable
-.IR name ,
-initializing
-.I name
-if it does not exist,
-and the index of the next argument to be processed into the
-variable
-.SM
-.BR OPTIND .
-.SM
-.B OPTIND
-is initialized to 1 each time the shell or a shell script
-is invoked. When an option requires an argument,
-.B getopts
-places that argument into the variable
-.SM
-.BR OPTARG .
-The shell does not reset
-.SM
-.B OPTIND
-automatically; it must be manually reset between multiple
-calls to
-.B getopts
-within the same shell invocation if a new set of parameters
-is to be used.
-.sp 1
-When the end of options is encountered, \fBgetopts\fP exits with a
-return value greater than zero.
-.SM
-.B OPTIND
-is set to the index of the first non-option argument,
-and \fIname\fP is set to ?.
-.sp 1
-.B getopts
-normally parses the positional parameters, but if more arguments are
-given in
-.IR args ,
-.B getopts
-parses those instead.
-.sp 1
-.B getopts
-can report errors in two ways. If the first character of
-.I optstring
-is a colon,
-.I silent
-error reporting is used. In normal operation diagnostic messages
-are printed when invalid options or missing option arguments are
-encountered.
-If the variable
-.SM
-.B OPTERR
-is set to 0, no error messages will be displayed, even if the first
-character of
-.I optstring
-is not a colon.
-.sp 1
-If an invalid option is seen,
-.B getopts
-places ? into
-.I name
-and, if not silent,
-prints an error message and unsets
-.SM
-.BR OPTARG .
-If
-.B getopts
-is silent,
-the option character found is placed in
-.SM
-.B OPTARG
-and no diagnostic message is printed.
-.sp 1
-If a required argument is not found, and
-.B getopts
-is not silent,
-a question mark (\^\fB?\fP\^) is placed in
-.IR name ,
-.SM
-.B OPTARG
-is unset, and a diagnostic message is printed.
-If
-.B getopts
-is silent, then a colon (\^\fB:\fP\^) is placed in
-.I name
-and
-.SM
-.B OPTARG
-is set to the option character found.
-.sp 1
-.B getopts
-returns true if an option, specified or unspecified, is found.
-It returns false if the end of options is encountered or an
-error occurs.
-.TP
-\fBhash\fP [\fB\-lr\fP] [\fB\-p\fP \fIfilename\fP] [\fB\-dt\fP] [\fIname\fP]
-Each time \fBhash\fP is invoked,
-the full pathname of the command
-.I name
-is determined by searching
-the directories in
-.B $PATH
-and remembered. Any previously-remembered pathname is discarded.
-If the
-.B \-p
-option is supplied, no path search is performed, and
-.I filename
-is used as the full file name of the command.
-The
-.B \-r
-option causes the shell to forget all
-remembered locations.
-The
-.B \-d
-option causes the shell to forget the remembered location of each \fIname\fP.
-If the
-.B \-t
-option is supplied, the full pathname to which each \fIname\fP corresponds
-is printed. If multiple \fIname\fP arguments are supplied with \fB\-t\fP,
-the \fIname\fP is printed before the hashed full pathname.
-The
-.B \-l
-option causes output to be displayed in a format that may be reused as input.
-If no arguments are given, or if only \fB\-l\fP is supplied,
-information about remembered commands is printed.
-The return status is true unless a
-.I name
-is not found or an invalid option is supplied.
-.TP
-\fBhelp\fP [\fB\-dms\fP] [\fIpattern\fP]
-Display helpful information about builtin commands. If
-.I pattern
-is specified,
-.B help
-gives detailed help on all commands matching
-.IR pattern ;
-otherwise help for all the builtins and shell control structures
-is printed.
-.RS
-.PD 0
-.TP
-.B \-d
-Display a short description of each \fIpattern\fP
-.TP
-.B \-m
-Display the description of each \fIpattern\fP in a manpage-like format
-.TP
-.B \-s
-Display only a short usage synopsis for each \fIpattern\fP
-.PD
-.PP
-The return status is 0 unless no command matches
-.IR pattern .
-.RE
-.TP
-\fBhistory [\fIn\fP]
-.PD 0
-.TP
-\fBhistory\fP \fB\-c\fP
-.TP
-\fBhistory \-d\fP \fIoffset\fP
-.TP
-\fBhistory\fP \fB\-anrw\fP [\fIfilename\fP]
-.TP
-\fBhistory\fP \fB\-p\fP \fIarg\fP [\fIarg ...\fP]
-.TP
-\fBhistory\fP \fB\-s\fP \fIarg\fP [\fIarg ...\fP]
-.PD
-With no options, display the command
-history list with line numbers. Lines listed
-with a
-.B *
-have been modified. An argument of
-.I n
-lists only the last
-.I n
-lines.
-If the shell variable
-.SM
-.B HISTTIMEFORMAT
-is set and not null,
-it is used as a format string for \fIstrftime\fP(3) to display
-the time stamp associated with each displayed history entry.
-No intervening blank is printed between the formatted time stamp
-and the history line.
-If \fIfilename\fP is supplied, it is used as the
-name of the history file; if not, the value of
-.SM
-.B HISTFILE
-is used. Options, if supplied, have the following meanings:
-.RS
-.PD 0
-.TP
-.B \-c
-Clear the history list by deleting all the entries.
-.TP
-\fB\-d\fP \fIoffset\fP
-Delete the history entry at position \fIoffset\fP.
-.TP
-.B \-a
-Append the ``new'' history lines (history lines entered since the
-beginning of the current \fBbash\fP session) to the history file.
-.TP
-.B \-n
-Read the history lines not already read from the history
-file into the current history list. These are lines
-appended to the history file since the beginning of the
-current \fBbash\fP session.
-.TP
-.B \-r
-Read the contents of the history file
-and use them as the current history.
-.TP
-.B \-w
-Write the current history to the history file, overwriting the
-history file's contents.
-.TP
-.B \-p
-Perform history substitution on the following \fIargs\fP and display
-the result on the standard output.
-Does not store the results in the history list.
-Each \fIarg\fP must be quoted to disable normal history expansion.
-.TP
-.B \-s
-Store the
-.I args
-in the history list as a single entry. The last command in the
-history list is removed before the
-.I args
-are added.
-.PD
-.PP
-If the
-.SM
-.B HISTTIMEFORMAT
-variable is set, the time stamp information
-associated with each history entry is written to the history file,
-marked with the history comment character.
-When the history file is read, lines beginning with the history
-comment character followed immediately by a digit are interpreted
-as timestamps for the previous history line.
-The return value is 0 unless an invalid option is encountered, an
-error occurs while reading or writing the history file, an invalid
-\fIoffset\fP is supplied as an argument to \fB\-d\fP, or the
-history expansion supplied as an argument to \fB\-p\fP fails.
-.RE
-.TP
-\fBjobs\fP [\fB\-lnprs\fP] [ \fIjobspec\fP ... ]
-.PD 0
-.TP
-\fBjobs\fP \fB\-x\fP \fIcommand\fP [ \fIargs\fP ... ]
-.PD
-The first form lists the active jobs. The options have the following
-meanings:
-.RS
-.PD 0
-.TP
-.B \-l
-List process IDs
-in addition to the normal information.
-.TP
-.B \-n
-Display information only about jobs that have changed status since
-the user was last notified of their status.
-.TP
-.B \-p
-List only the process ID of the job's process group
-leader.
-.TP
-.B \-r
-Restrict output to running jobs.
-.TP
-.B \-s
-Restrict output to stopped jobs.
-.PD
-.PP
-If
-.I jobspec
-is given, output is restricted to information about that job.
-The return status is 0 unless an invalid option is encountered
-or an invalid
-.I jobspec
-is supplied.
-.PP
-If the
-.B \-x
-option is supplied,
-.B jobs
-replaces any
-.I jobspec
-found in
-.I command
-or
-.I args
-with the corresponding process group ID, and executes
-.I command
-passing it
-.IR args ,
-returning its exit status.
-.RE
-.TP
-\fBkill\fP [\fB\-s\fP \fIsigspec\fP | \fB\-n\fP \fIsignum\fP | \fB\-\fP\fIsigspec\fP] [\fIpid\fP | \fIjobspec\fP] ...
-.PD 0
-.TP
-\fBkill\fP \fB\-l\fP [\fIsigspec\fP | \fIexit_status\fP]
-.PD
-Send the signal named by
-.I sigspec
-or
-.I signum
-to the processes named by
-.I pid
-or
-.IR jobspec .
-.I sigspec
-is either a case-insensitive signal name such as
-.SM
-.B SIGKILL
-(with or without the
-.SM
-.B SIG
-prefix) or a signal number;
-.I signum
-is a signal number.
-If
-.I sigspec
-is not present, then
-.SM
-.B SIGTERM
-is assumed.
-An argument of
-.B \-l
-lists the signal names.
-If any arguments are supplied when
-.B \-l
-is given, the names of the signals corresponding to the arguments are
-listed, and the return status is 0.
-The \fIexit_status\fP argument to
-.B \-l
-is a number specifying either a signal number or the exit status of
-a process terminated by a signal.
-.B kill
-returns true if at least one signal was successfully sent, or false
-if an error occurs or an invalid option is encountered.
-.TP
-\fBlet\fP \fIarg\fP [\fIarg\fP ...]
-Each
-.I arg
-is an arithmetic expression to be evaluated (see
-.SM
-.B "ARITHMETIC EVALUATION"
-above).
-If the last
-.I arg
-evaluates to 0,
-.B let
-returns 1; 0 is returned otherwise.
-.TP
-\fBlocal\fP [\fIoption\fP] [\fIname\fP[=\fIvalue\fP] ...]
-For each argument, a local variable named
-.I name
-is created, and assigned
-.IR value .
-The \fIoption\fP can be any of the options accepted by \fBdeclare\fP.
-When
-.B local
-is used within a function, it causes the variable
-.I name
-to have a visible scope restricted to that function and its children.
-With no operands,
-.B local
-writes a list of local variables to the standard output. It is
-an error to use
-.B local
-when not within a function. The return status is 0 unless
-.B local
-is used outside a function, an invalid
-.I name
-is supplied, or
-\fIname\fP is a readonly variable.
-.TP
-.B logout
-Exit a login shell.
-.TP
-\fBmapfile\fP [\fB\-n\fP \fIcount\fP] [\fB\-O\fP \fIorigin\fP] [\fB\-s\fP \fIcount\fP] [\fB\-t\fP] [\fB\-u\fP \fIfd\fP] [\fB\-C\fP \fIcallback\fP] [\fB\-c\fP \fIquantum\fP] [\fIarray\fP]
-.PD 0
-.TP
-\fBreadarray\fP [\fB\-n\fP \fIcount\fP] [\fB\-O\fP \fIorigin\fP] [\fB\-s\fP \fIcount\fP] [\fB\-t\fP] [\fB\-u\fP \fIfd\fP] [\fB\-C\fP \fIcallback\fP] [\fB\-c\fP \fIquantum\fP] [\fIarray\fP]
-.PD
-Read lines from the standard input into the indexed array variable
-.IR array ,
-or from file descriptor
-.IR fd
-if the
-.B \-u
-option is supplied.
-The variable
-.SM
-.B MAPFILE
-is the default \fIarray\fP.
-Options, if supplied, have the following meanings:
-.RS
-.PD 0
-.TP
-.B \-n
-Copy at most
-.I count
-lines. If \fIcount\fP is 0, all lines are copied.
-.TP
-.B \-O
-Begin assigning to
-.I array
-at index
-.IR origin .
-The default index is 0.
-.TP
-.B \-s
-Discard the first \fIcount\fP lines read.
-.TP
-.B \-t
-Remove a trailing newline from each line read.
-.TP
-.B \-u
-Read lines from file descriptor \fIfd\fP instead of the standard input.
-.TP
-.B \-C
-Evaluate
-.I callback
-each time \fIquantum\fP lines are read. The \fB\-c\fP option specifies
-.IR quantum .
-.TP
-.B \-c
-Specify the number of lines read between each call to
-.IR callback .
-.PD
-.PP
-If
-.B \-C
-is specified without
-.BR \-c ,
-the default quantum is 5000.
-When \fIcallback\fP is evaluated, it is supplied the index of the next
-array element to be assigned and the line to be assigned to that element
-as additional arguments.
-\fIcallback\fP is evaluated after the line is read but before the
-array element is assigned.
-.PP
-If not supplied with an explicit origin, \fBmapfile\fP will clear \fIarray\fP
-before assigning to it.
-.PP
-\fBmapfile\fP returns successfully unless an invalid option or option
-argument is supplied, \fIarray\fP is invalid or unassignable, or if
-\fIarray\fP is not an indexed array.
-.RE
-.TP
-\fBpopd\fP [\-\fBn\fP] [+\fIn\fP] [\-\fIn\fP]
-Removes entries from the directory stack. With no arguments,
-removes the top directory from the stack, and performs a
-.B cd
-to the new top directory.
-Arguments, if supplied, have the following meanings:
-.RS
-.PD 0
-.TP
-.B \-n
-Suppresses the normal change of directory when removing directories
-from the stack, so that only the stack is manipulated.
-.TP
-\fB+\fP\fIn\fP
-Removes the \fIn\fPth entry counting from the left of the list
-shown by
-.BR dirs ,
-starting with zero. For example:
-.if n ``popd +0''
-.if t \f(CWpopd +0\fP
-removes the first directory,
-.if n ``popd +1''
-.if t \f(CWpopd +1\fP
-the second.
-.TP
-\fB\-\fP\fIn\fP
-Removes the \fIn\fPth entry counting from the right of the list
-shown by
-.BR dirs ,
-starting with zero. For example:
-.if n ``popd -0''
-.if t \f(CWpopd -0\fP
-removes the last directory,
-.if n ``popd -1''
-.if t \f(CWpopd -1\fP
-the next to last.
-.PD
-.PP
-If the
-.B popd
-command is successful, a
-.B dirs
-is performed as well, and the return status is 0.
-.B popd
-returns false if an invalid option is encountered, the directory stack
-is empty, a non-existent directory stack entry is specified, or the
-directory change fails.
-.RE
-.TP
-\fBprintf\fP [\fB\-v\fP \fIvar\fP] \fIformat\fP [\fIarguments\fP]
-Write the formatted \fIarguments\fP to the standard output under the
-control of the \fIformat\fP.
-The \fB\-v\fP option causes the output to be assigned to the variable
-\fIvar\fP rather than being printed to the standard output.
-.sp 1
-The \fIformat\fP is a character string which contains three types of objects:
-plain characters, which are simply copied to standard output, character
-escape sequences, which are converted and copied to the standard output, and
-format specifications, each of which causes printing of the next successive
-\fIargument\fP.
-In addition to the standard \fIprintf\fP(1) format specifications,
-\fBprintf\fP interprets the following extensions:
-.RS
-.PD 0
-.TP
-.B %b
-causes
-\fBprintf\fP to expand backslash escape sequences in the corresponding
-\fIargument\fP (except that \fB\ec\fP terminates output, backslashes in
-\fB\e\(aq\fP, \fB\e"\fP, and \fB\e?\fP are not removed, and octal escapes
-beginning with \fB\e0\fP may contain up to four digits).
-.TP
-.B %q
-causes \fBprintf\fP to output the corresponding
-\fIargument\fP in a format that can be reused as shell input.
-.TP
-.B %(\fIdatefmt\fP)T
-causes \fBprintf\fP to output the date-time string resulting from using
-\fIdatefmt\fP as a format string for \fIstrftime\fP(3). The corresponding
-\fIargument\fP is an integer representing the number of seconds since the
-epoch. Two special argument values may be used: -1 represents the current
-time, and -2 represents the time the shell was invoked.
-.PD
-.PP
-Arguments to non-string format specifiers are treated as C constants,
-except that a leading plus or minus sign is allowed, and if the leading
-character is a single or double quote, the value is the ASCII value of
-the following character.
-.PP
-The \fIformat\fP is reused as necessary to consume all of the \fIarguments\fP.
-If the \fIformat\fP requires more \fIarguments\fP than are supplied, the
-extra format specifications behave as if a zero value or null string, as
-appropriate, had been supplied.
-The return value is zero on success, non-zero on failure.
-.RE
-.TP
-\fBpushd\fP [\fB\-n\fP] [+\fIn\fP] [\-\fIn\fP]
-.PD 0
-.TP
-\fBpushd\fP [\fB\-n\fP] [\fIdir\fP]
-.PD
-Adds a directory to the top of the directory stack, or rotates
-the stack, making the new top of the stack the current working
-directory. With no arguments, exchanges the top two directories
-and returns 0, unless the directory stack is empty.
-Arguments, if supplied, have the following meanings:
-.RS
-.PD 0
-.TP
-.B \-n
-Suppresses the normal change of directory when adding directories
-to the stack, so that only the stack is manipulated.
-.TP
-\fB+\fP\fIn\fP
-Rotates the stack so that the \fIn\fPth directory
-(counting from the left of the list shown by
-.BR dirs ,
-starting with zero)
-is at the top.
-.TP
-\fB\-\fP\fIn\fP
-Rotates the stack so that the \fIn\fPth directory
-(counting from the right of the list shown by
-.BR dirs ,
-starting with zero) is at the top.
-.TP
-.I dir
-Adds
-.I dir
-to the directory stack at the top, making it the
-new current working directory.
-.PD
-.PP
-If the
-.B pushd
-command is successful, a
-.B dirs
-is performed as well.
-If the first form is used,
-.B pushd
-returns 0 unless the cd to
-.I dir
-fails. With the second form,
-.B pushd
-returns 0 unless the directory stack is empty,
-a non-existent directory stack element is specified,
-or the directory change to the specified new current directory
-fails.
-.RE
-.TP
-\fBpwd\fP [\fB\-LP\fP]
-Print the absolute pathname of the current working directory.
-The pathname printed contains no symbolic links if the
-.B \-P
-option is supplied or the
-.B \-o physical
-option to the
-.B set
-builtin command is enabled.
-If the
-.B \-L
-option is used, the pathname printed may contain symbolic links.
-The return status is 0 unless an error occurs while
-reading the name of the current directory or an
-invalid option is supplied.
-.TP
-\fBread\fP [\fB\-ers\fP] [\fB\-a\fP \fIaname\fP] [\fB\-d\fP \fIdelim\fP] [\fB\-i\fP \fItext\fP] [\fB\-n\fP \fInchars\fP] [\fB\-N\fP \fInchars\fP] [\fB\-p\fP \fIprompt\fP] [\fB\-t\fP \fItimeout\fP] [\fB\-u\fP \fIfd\fP] [\fIname\fP ...]
-One line is read from the standard input, or from the file descriptor
-\fIfd\fP supplied as an argument to the \fB\-u\fP option, and the first word
-is assigned to the first
-.IR name ,
-the second word to the second
-.IR name ,
-and so on, with leftover words and their intervening separators assigned
-to the last
-.IR name .
-If there are fewer words read from the input stream than names,
-the remaining names are assigned empty values.
-The characters in
-.SM
-.B IFS
-are used to split the line into words.
-The backslash character (\fB\e\fP) may be used to remove any special
-meaning for the next character read and for line continuation.
-Options, if supplied, have the following meanings:
-.RS
-.PD 0
-.TP
-.B \-a \fIaname\fP
-The words are assigned to sequential indices
-of the array variable
-.IR aname ,
-starting at 0.
-.I aname
-is unset before any new values are assigned.
-Other \fIname\fP arguments are ignored.
-.TP
-.B \-d \fIdelim\fP
-The first character of \fIdelim\fP is used to terminate the input line,
-rather than newline.
-.TP
-.B \-e
-If the standard input
-is coming from a terminal,
-.B readline
-(see
-.SM
-.B READLINE
-above) is used to obtain the line.
-Readline uses the current (or default, if line editing was not previously
-active) editing settings.
-.TP
-.B \-i \fItext\fP
-If
-.B readline
-is being used to read the line, \fItext\fP is placed into the editing
-buffer before editing begins.
-.TP
-.B \-n \fInchars\fP
-\fBread\fP returns after reading \fInchars\fP characters rather than
-waiting for a complete line of input, but honor a delimiter if fewer
-than \fInchars\fP characters are read before the delimiter.
-.TP
-.B \-N \fInchars\fP
-\fBread\fP returns after reading exactly \fInchars\fP characters rather
-than waiting for a complete line of input, unless EOF is encountered or
-\fBread\fP times out.
-Delimiter characters encountered in the input are
-not treated specially and do not cause \fBread\fP to return until
-\fInchars\fP characters are read.
-.TP
-.B \-p \fIprompt\fP
-Display \fIprompt\fP on standard error, without a
-trailing newline, before attempting to read any input. The prompt
-is displayed only if input is coming from a terminal.
-.TP
-.B \-r
-Backslash does not act as an escape character.
-The backslash is considered to be part of the line.
-In particular, a backslash-newline pair may not be used as a line
-continuation.
-.TP
-.B \-s
-Silent mode. If input is coming from a terminal, characters are
-not echoed.
-.TP
-.B \-t \fItimeout\fP
-Cause \fBread\fP to time out and return failure if a complete line of
-input is not read within \fItimeout\fP seconds.
-\fItimeout\fP may be a decimal number with a fractional portion following
-the decimal point.
-This option is only effective if \fBread\fP is reading input from a
-terminal, pipe, or other special file; it has no effect when reading
-from regular files.
-If \fItimeout\fP is 0, \fBread\fP returns success if input is available on
-the specified file descriptor, failure otherwise.
-The exit status is greater than 128 if the timeout is exceeded.
-.TP
-.B \-u \fIfd\fP
-Read input from file descriptor \fIfd\fP.
-.PD
-.PP
-If no
-.I names
-are supplied, the line read is assigned to the variable
-.SM
-.BR REPLY .
-The return code is zero, unless end-of-file is encountered, \fBread\fP
-times out (in which case the return code is greater than 128), or an
-invalid file descriptor is supplied as the argument to \fB\-u\fP.
-.RE
-.TP
-\fBreadonly\fP [\fB\-aAf\fP] [\fB\-p\fP] [\fIname\fP[=\fIword\fP] ...]
-.PD
-The given
-\fInames\fP are marked readonly; the values of these
-.I names
-may not be changed by subsequent assignment.
-If the
-.B \-f
-option is supplied, the functions corresponding to the
-\fInames\fP are so
-marked.
-The
-.B \-a
-option restricts the variables to indexed arrays; the
-.B \-A
-option restricts the variables to associative arrays.
-If both options are supplied,
-.B \-A
-takes precedence.
-If no
-.I name
-arguments are given, or if the
-.B \-p
-option is supplied, a list of all readonly names is printed.
-The other options may be used to restrict the output to a subset of
-the set of readonly names.
-The
-.B \-p
-option causes output to be displayed in a format that
-may be reused as input.
-If a variable name is followed by =\fIword\fP, the value of
-the variable is set to \fIword\fP.
-The return status is 0 unless an invalid option is encountered,
-one of the
-.I names
-is not a valid shell variable name, or
-.B \-f
-is supplied with a
-.I name
-that is not a function.
-.TP
-\fBreturn\fP [\fIn\fP]
-Causes a function to exit with the return value specified by
-.IR n .
-If
-.I n
-is omitted, the return status is that of the last command
-executed in the function body. If used outside a function,
-but during execution of a script by the
-.B .
-(\fBsource\fP) command, it causes the shell to stop executing
-that script and return either
-.I n
-or the exit status of the last command executed within the
-script as the exit status of the script. If used outside a
-function and not during execution of a script by \fB.\fP\^,
-the return status is false.
-Any command associated with the \fBRETURN\fP trap is executed
-before execution resumes after the function or script.
-.TP
-\fBset\fP [\fB\-\-abefhkmnptuvxBCEHPT\fP] [\fB\-o\fP \fIoption\-name\fP] [\fIarg\fP ...]
-.PD 0
-.TP
-\fBset\fP [\fB+abefhkmnptuvxBCEHPT\fP] [\fB+o\fP \fIoption\-name\fP] [\fIarg\fP ...]
-.PD
-Without options, the name and value of each shell variable are displayed
-in a format that can be reused as input
-for setting or resetting the currently-set variables.
-Read-only variables cannot be reset.
-In \fIposix mode\fP, only shell variables are listed.
-The output is sorted according to the current locale.
-When options are specified, they set or unset shell attributes.
-Any arguments remaining after option processing are treated
-as values for the positional parameters and are assigned, in order, to
-.BR $1 ,
-.BR $2 ,
-.B ...
-.BR $\fIn\fP .
-Options, if specified, have the following meanings:
-.RS
-.PD 0
-.TP 8
-.B \-a
-Automatically mark variables and functions which are modified or
-created for export to the environment of subsequent commands.
-.TP 8
-.B \-b
-Report the status of terminated background jobs
-immediately, rather than before the next primary prompt. This is
-effective only when job control is enabled.
-.TP 8
-.B \-e
-Exit immediately if a \fIpipeline\fP (which may consist of a single
-\fIsimple command\fP), a \fIsubshell\fP command enclosed in parentheses,
-or one of the commands executed as part of a command list enclosed
-by braces (see
-.SM
-.B SHELL GRAMMAR
-above) exits with a non-zero status.
-The shell does not exit if the
-command that fails is part of the command list immediately following a
-.B while
-or
-.B until
-keyword,
-part of the test following the
-.B if
-or
-.B elif
-reserved words, part of any command executed in a
-.B &&
-or
-.B ||
-list except the command following the final \fB&&\fP or \fB||\fP,
-any command in a pipeline but the last,
-or if the command's return value is
-being inverted with
-.BR ! .
-A trap on \fBERR\fP, if set, is executed before the shell exits.
-This option applies to the shell environment and each subshell environment
-separately (see
-.SM
-.B "COMMAND EXECUTION ENVIRONMENT"
-above), and may cause
-subshells to exit before executing all the commands in the subshell.
-.TP 8
-.B \-f
-Disable pathname expansion.
-.TP 8
-.B \-h
-Remember the location of commands as they are looked up for execution.
-This is enabled by default.
-.TP 8
-.B \-k
-All arguments in the form of assignment statements
-are placed in the environment for a command, not just
-those that precede the command name.
-.TP 8
-.B \-m
-Monitor mode. Job control is enabled. This option is on
-by default for interactive shells on systems that support
-it (see
-.SM
-.B JOB CONTROL
-above).
-All processes run in a separate process group.
-When a background job completes, the shell prints a line
-containing its exit status.
-.TP 8
-.B \-n
-Read commands but do not execute them. This may be used to
-check a shell script for syntax errors. This is ignored by
-interactive shells.
-.TP 8
-.B \-o \fIoption\-name\fP
-The \fIoption\-name\fP can be one of the following:
-.RS
-.TP 8
-.B allexport
-Same as
-.BR \-a .
-.TP 8
-.B braceexpand
-Same as
-.BR \-B .
-.TP 8
-.B emacs
-Use an emacs-style command line editing interface. This is enabled
-by default when the shell is interactive, unless the shell is started
-with the
-.B \-\-noediting
-option.
-This also affects the editing interface used for \fBread \-e\fP.
-.TP 8
-.B errexit
-Same as
-.BR \-e .
-.TP 8
-.B errtrace
-Same as
-.BR \-E .
-.TP 8
-.B functrace
-Same as
-.BR \-T .
-.TP 8
-.B hashall
-Same as
-.BR \-h .
-.TP 8
-.B histexpand
-Same as
-.BR \-H .
-.TP 8
-.B history
-Enable command history, as described above under
-.SM
-.BR HISTORY .
-This option is on by default in interactive shells.
-.TP 8
-.B ignoreeof
-The effect is as if the shell command
-.if t \f(CWIGNOREEOF=10\fP
-.if n ``IGNOREEOF=10''
-had been executed
-(see
-.B Shell Variables
-above).
-.TP 8
-.B keyword
-Same as
-.BR \-k .
-.TP 8
-.B monitor
-Same as
-.BR \-m .
-.TP 8
-.B noclobber
-Same as
-.BR \-C .
-.TP 8
-.B noexec
-Same as
-.BR \-n .
-.TP 8
-.B noglob
-Same as
-.BR \-f .
-.TP 8
-.B nolog
-Currently ignored.
-.TP 8
-.B notify
-Same as
-.BR \-b .
-.TP 8
-.B nounset
-Same as
-.BR \-u .
-.TP 8
-.B onecmd
-Same as
-.BR \-t .
-.TP 8
-.B physical
-Same as
-.BR \-P .
-.TP 8
-.B pipefail
-If set, the return value of a pipeline is the value of the last
-(rightmost) command to exit with a non-zero status, or zero if all
-commands in the pipeline exit successfully.
-This option is disabled by default.
-.TP 8
-.B posix
-Change the behavior of
-.B bash
-where the default operation differs
-from the POSIX standard to match the standard (\fIposix mode\fP).
-.TP 8
-.B privileged
-Same as
-.BR \-p .
-.TP 8
-.B verbose
-Same as
-.BR \-v .
-.TP 8
-.B vi
-Use a vi-style command line editing interface.
-This also affects the editing interface used for \fBread \-e\fP.
-.TP 8
-.B xtrace
-Same as
-.BR \-x .
-.sp .5
-.PP
-If
-.B \-o
-is supplied with no \fIoption\-name\fP, the values of the current options are
-printed.
-If
-.B +o
-is supplied with no \fIoption\-name\fP, a series of
-.B set
-commands to recreate the current option settings is displayed on
-the standard output.
-.RE
-.TP 8
-.B \-p
-Turn on
-.I privileged
-mode. In this mode, the
-.SM
-.B $ENV
-and
-.SM
-.B $BASH_ENV
-files are not processed, shell functions are not inherited from the
-environment, and the
-.SM
-.BR SHELLOPTS ,
-.SM
-.BR BASHOPTS ,
-.SM
-.BR CDPATH ,
-and
-.SM
-.B GLOBIGNORE
-variables, if they appear in the environment, are ignored.
-If the shell is started with the effective user (group) id not equal to the
-real user (group) id, and the \fB\-p\fP option is not supplied, these actions
-are taken and the effective user id is set to the real user id.
-If the \fB\-p\fP option is supplied at startup, the effective user id is
-not reset.
-Turning this option off causes the effective user
-and group ids to be set to the real user and group ids.
-.TP 8
-.B \-t
-Exit after reading and executing one command.
-.TP 8
-.B \-u
-Treat unset variables and parameters other than the special
-parameters "@" and "*" as an error when performing
-parameter expansion. If expansion is attempted on an
-unset variable or parameter, the shell prints an error message, and,
-if not interactive, exits with a non-zero status.
-.TP 8
-.B \-v
-Print shell input lines as they are read.
-.TP 8
-.B \-x
-After expanding each \fIsimple command\fP,
-\fBfor\fP command, \fBcase\fP command, \fBselect\fP command, or
-arithmetic \fBfor\fP command, display the expanded value of
-.SM
-.BR PS4 ,
-followed by the command and its expanded arguments
-or associated word list.
-.TP 8
-.B \-B
-The shell performs brace expansion (see
-.B Brace Expansion
-above). This is on by default.
-.TP 8
-.B \-C
-If set,
-.B bash
-does not overwrite an existing file with the
-.BR > ,
-.BR >& ,
-and
-.B <>
-redirection operators. This may be overridden when
-creating output files by using the redirection operator
-.B >|
-instead of
-.BR > .
-.TP 8
-.B \-E
-If set, any trap on \fBERR\fP is inherited by shell functions, command
-substitutions, and commands executed in a subshell environment.
-The \fBERR\fP trap is normally not inherited in such cases.
-.TP 8
-.B \-H
-Enable
-.B !
-style history substitution. This option is on by
-default when the shell is interactive.
-.TP 8
-.B \-P
-If set, the shell does not follow symbolic links when executing
-commands such as
-.B cd
-that change the current working directory. It uses the
-physical directory structure instead. By default,
-.B bash
-follows the logical chain of directories when performing commands
-which change the current directory.
-.TP 8
-.B \-T
-If set, any traps on \fBDEBUG\fP and \fBRETURN\fP are inherited by shell
-functions, command substitutions, and commands executed in a
-subshell environment.
-The \fBDEBUG\fP and \fBRETURN\fP traps are normally not inherited
-in such cases.
-.TP 8
-.B \-\-
-If no arguments follow this option, then the positional parameters are
-unset. Otherwise, the positional parameters are set to the
-\fIarg\fPs, even if some of them begin with a
-.BR \- .
-.TP 8
-.B \-
-Signal the end of options, cause all remaining \fIarg\fPs to be
-assigned to the positional parameters. The
-.B \-x
-and
-.B \-v
-options are turned off.
-If there are no \fIarg\fPs,
-the positional parameters remain unchanged.
-.PD
-.PP
-The options are off by default unless otherwise noted.
-Using + rather than \- causes these options to be turned off.
-The options can also be specified as arguments to an invocation of
-the shell.
-The current set of options may be found in
-.BR $\- .
-The return status is always true unless an invalid option is encountered.
-.RE
-.TP
-\fBshift\fP [\fIn\fP]
-The positional parameters from \fIn\fP+1 ... are renamed to
-.B $1
-.B ....
-Parameters represented by the numbers \fB$#\fP
-down to \fB$#\fP\-\fIn\fP+1 are unset.
-.I n
-must be a non-negative number less than or equal to \fB$#\fP.
-If
-.I n
-is 0, no parameters are changed.
-If
-.I n
-is not given, it is assumed to be 1.
-If
-.I n
-is greater than \fB$#\fP, the positional parameters are not changed.
-The return status is greater than zero if
-.I n
-is greater than
-.B $#
-or less than zero; otherwise 0.
-.TP
-\fBshopt\fP [\fB\-pqsu\fP] [\fB\-o\fP] [\fIoptname\fP ...]
-Toggle the values of variables controlling optional shell behavior.
-With no options, or with the
-.B \-p
-option, a list of all settable options is displayed, with
-an indication of whether or not each is set.
-The \fB\-p\fP option causes output to be displayed in a form that
-may be reused as input.
-Other options have the following meanings:
-.RS
-.PD 0
-.TP
-.B \-s
-Enable (set) each \fIoptname\fP.
-.TP
-.B \-u
-Disable (unset) each \fIoptname\fP.
-.TP
-.B \-q
-Suppresses normal output (quiet mode); the return status indicates
-whether the \fIoptname\fP is set or unset.
-If multiple \fIoptname\fP arguments are given with
-.BR \-q ,
-the return status is zero if all \fIoptnames\fP are enabled; non-zero
-otherwise.
-.TP
-.B \-o
-Restricts the values of \fIoptname\fP to be those defined for the
-.B \-o
-option to the
-.B set
-builtin.
-.PD
-.PP
-If either
-.B \-s
-or
-.B \-u
-is used with no \fIoptname\fP arguments, the display is limited to
-those options which are set or unset, respectively.
-Unless otherwise noted, the \fBshopt\fP options are disabled (unset)
-by default.
-.PP
-The return status when listing options is zero if all \fIoptnames\fP
-are enabled, non-zero otherwise. When setting or unsetting options,
-the return status is zero unless an \fIoptname\fP is not a valid shell
-option.
-.PP
-The list of \fBshopt\fP options is:
-.if t .sp .5v
-.if n .sp 1v
-.PD 0
-.TP 8
-.B autocd
-If set, a command name that is the name of a directory is executed as if
-it were the argument to the \fBcd\fP command.
-This option is only used by interactive shells.
-.TP 8
-.B cdable_vars
-If set, an argument to the
-.B cd
-builtin command that
-is not a directory is assumed to be the name of a variable whose
-value is the directory to change to.
-.TP 8
-.B cdspell
-If set, minor errors in the spelling of a directory component in a
-.B cd
-command will be corrected.
-The errors checked for are transposed characters,
-a missing character, and one character too many.
-If a correction is found, the corrected file name is printed,
-and the command proceeds.
-This option is only used by interactive shells.
-.TP 8
-.B checkhash
-If set, \fBbash\fP checks that a command found in the hash
-table exists before trying to execute it. If a hashed command no
-longer exists, a normal path search is performed.
-.TP 8
-.B checkjobs
-If set, \fBbash\fP lists the status of any stopped and running jobs before
-exiting an interactive shell. If any jobs are running, this causes
-the exit to be deferred until a second exit is attempted without an
-intervening command (see
-.SM
-.B "JOB CONTROL"
-above). The shell always
-postpones exiting if any jobs are stopped.
-.TP 8
-.B checkwinsize
-If set, \fBbash\fP checks the window size after each command
-and, if necessary, updates the values of
-.SM
-.B LINES
-and
-.SM
-.BR COLUMNS .
-.TP 8
-.B cmdhist
-If set,
-.B bash
-attempts to save all lines of a multiple-line
-command in the same history entry. This allows
-easy re-editing of multi-line commands.
-.TP 8
-.B compat31
-If set,
-.B bash
-changes its behavior to that of version 3.1 with respect to quoted
-arguments to the \fB[[\fP conditional command's \fB=~\fP operator.
-.TP 8
-.B compat32
-If set,
-.B bash
-changes its behavior to that of version 3.2 with respect to locale-specific
-string comparison when using the \fB[[\fP
-conditional command's \fB<\fP and \fB>\fP operators.
-Bash versions prior to bash-4.1 use ASCII collation and
-.IR strcmp (3);
-bash-4.1 and later
-use the current locale's collation sequence and
-.IR strcoll (3).
-.TP 8
-.B compat40
-If set,
-.B bash
-changes its behavior to that of version 4.0 with respect to locale-specific
-string comparison when using the \fB[[\fP
-conditional command's \fB<\fP and \fB>\fP operators (see previous item)
-and the effect of interrupting a command list.
-.TP 8
-.B compat41
-If set,
-.BR bash ,
-when in posix mode, treats a single quote in a double-quoted
-parameter expansion as a special character. The single quotes must match
-(an even number) and the characters between the single quotes are considered
-quoted. This is the behavior of posix mode through version 4.1.
-The default bash behavior remains as in previous versions.
-.TP 8
-.B dirspell
-If set,
-.B bash
-attempts spelling correction on directory names during word completion
-if the directory name initially supplied does not exist.
-.TP 8
-.B dotglob
-If set,
-.B bash
-includes filenames beginning with a `.' in the results of pathname
-expansion.
-.TP 8
-.B execfail
-If set, a non-interactive shell will not exit if
-it cannot execute the file specified as an argument to the
-.B exec
-builtin command. An interactive shell does not exit if
-.B exec
-fails.
-.TP 8
-.B expand_aliases
-If set, aliases are expanded as described above under
-.SM
-.BR ALIASES .
-This option is enabled by default for interactive shells.
-.TP 8
-.B extdebug
-If set, behavior intended for use by debuggers is enabled:
-.RS
-.TP
-.B 1.
-The \fB\-F\fP option to the \fBdeclare\fP builtin displays the source
-file name and line number corresponding to each function name supplied
-as an argument.
-.TP
-.B 2.
-If the command run by the \fBDEBUG\fP trap returns a non-zero value, the
-next command is skipped and not executed.
-.TP
-.B 3.
-If the command run by the \fBDEBUG\fP trap returns a value of 2, and the
-shell is executing in a subroutine (a shell function or a shell script
-executed by the \fB.\fP or \fBsource\fP builtins), a call to
-\fBreturn\fP is simulated.
-.TP
-.B 4.
-.SM
-.B BASH_ARGC
-and
-.SM
-.B BASH_ARGV
-are updated as described in their descriptions above.
-.TP
-.B 5.
-Function tracing is enabled: command substitution, shell functions, and
-subshells invoked with \fB(\fP \fIcommand\fP \fB)\fP inherit the
-\fBDEBUG\fP and \fBRETURN\fP traps.
-.TP
-.B 6.
-Error tracing is enabled: command substitution, shell functions, and
-subshells invoked with \fB(\fP \fIcommand\fP \fB)\fP inherit the
-\fBERR\fP trap.
-.RE
-.TP 8
-.B extglob
-If set, the extended pattern matching features described above under
-\fBPathname Expansion\fP are enabled.
-.TP 8
-.B extquote
-If set, \fB$\fP\(aq\fIstring\fP\(aq and \fB$\fP"\fIstring\fP" quoting is
-performed within \fB${\fP\fIparameter\fP\fB}\fP expansions
-enclosed in double quotes. This option is enabled by default.
-.TP 8
-.B failglob
-If set, patterns which fail to match filenames during pathname expansion
-result in an expansion error.
-.TP 8
-.B force_fignore
-If set, the suffixes specified by the
-.SM
-.B FIGNORE
-shell variable
-cause words to be ignored when performing word completion even if
-the ignored words are the only possible completions.
-See
-.SM
-\fBSHELL VARIABLES\fP
-above for a description of
-.SM
-.BR FIGNORE .
-This option is enabled by default.
-.TP 8
-.B globstar
-If set, the pattern \fB**\fP used in a pathname expansion context will
-match all files and zero or more directories and subdirectories.
-If the pattern is followed by a \fB/\fP, only directories and
-subdirectories match.
-.TP 8
-.B gnu_errfmt
-If set, shell error messages are written in the standard GNU error
-message format.
-.TP 8
-.B histappend
-If set, the history list is appended to the file named by the value
-of the
-.SM
-.B HISTFILE
-variable when the shell exits, rather than overwriting the file.
-.TP 8
-.B histreedit
-If set, and
-.B readline
-is being used, a user is given the opportunity to re-edit a
-failed history substitution.
-.TP 8
-.B histverify
-If set, and
-.B readline
-is being used, the results of history substitution are not immediately
-passed to the shell parser. Instead, the resulting line is loaded into
-the \fBreadline\fP editing buffer, allowing further modification.
-.TP 8
-.B hostcomplete
-If set, and
-.B readline
-is being used, \fBbash\fP will attempt to perform hostname completion when a
-word containing a \fB@\fP is being completed (see
-.B Completing
-under
-.SM
-.B READLINE
-above).
-This is enabled by default.
-.TP 8
-.B huponexit
-If set, \fBbash\fP will send
-.SM
-.B SIGHUP
-to all jobs when an interactive login shell exits.
-.TP 8
-.B interactive_comments
-If set, allow a word beginning with
-.B #
-to cause that word and all remaining characters on that
-line to be ignored in an interactive shell (see
-.SM
-.B COMMENTS
-above). This option is enabled by default.
-.TP 8
-.B lastpipe
-If set, and job control is not active, the shell runs the last command of
-a pipeline not executed in the background in the current shell environment.
-.TP 8
-.B lithist
-If set, and the
-.B cmdhist
-option is enabled, multi-line commands are saved to the history with
-embedded newlines rather than using semicolon separators where possible.
-.TP 8
-.B login_shell
-The shell sets this option if it is started as a login shell (see
-.SM
-.B "INVOCATION"
-above).
-The value may not be changed.
-.TP 8
-.B mailwarn
-If set, and a file that \fBbash\fP is checking for mail has been
-accessed since the last time it was checked, the message ``The mail in
-\fImailfile\fP has been read'' is displayed.
-.TP 8
-.B no_empty_cmd_completion
-If set, and
-.B readline
-is being used,
-.B bash
-will not attempt to search the
-.SM
-.B PATH
-for possible completions when
-completion is attempted on an empty line.
-.TP 8
-.B nocaseglob
-If set,
-.B bash
-matches filenames in a case\-insensitive fashion when performing pathname
-expansion (see
-.B Pathname Expansion
-above).
-.TP 8
-.B nocasematch
-If set,
-.B bash
-matches patterns in a case\-insensitive fashion when performing matching
-while executing \fBcase\fP or \fB[[\fP conditional commands.
-.TP 8
-.B nullglob
-If set,
-.B bash
-allows patterns which match no
-files (see
-.B Pathname Expansion
-above)
-to expand to a null string, rather than themselves.
-.TP 8
-.B progcomp
-If set, the programmable completion facilities (see
-\fBProgrammable Completion\fP above) are enabled.
-This option is enabled by default.
-.TP 8
-.B promptvars
-If set, prompt strings undergo
-parameter expansion, command substitution, arithmetic
-expansion, and quote removal after being expanded as described in
-.SM
-.B PROMPTING
-above. This option is enabled by default.
-.TP 8
-.B restricted_shell
-The shell sets this option if it is started in restricted mode (see
-.SM
-.B "RESTRICTED SHELL"
-below).
-The value may not be changed.
-This is not reset when the startup files are executed, allowing
-the startup files to discover whether or not a shell is restricted.
-.TP 8
-.B shift_verbose
-If set, the
-.B shift
-builtin prints an error message when the shift count exceeds the
-number of positional parameters.
-.TP 8
-.B sourcepath
-If set, the
-\fBsource\fP (\fB.\fP) builtin uses the value of
-.SM
-.B PATH
-to find the directory containing the file supplied as an argument.
-This option is enabled by default.
-.TP 8
-.B xpg_echo
-If set, the \fBecho\fP builtin expands backslash-escape sequences
-by default.
-.RE
-.PD
-.TP
-\fBsuspend\fP [\fB\-f\fP]
-Suspend the execution of this shell until it receives a
-.SM
-.B SIGCONT
-signal. A login shell cannot be suspended; the
-.B \-f
-option can be used to override this and force the suspension.
-The return status is 0 unless the shell is a login shell and
-.B \-f
-is not supplied, or if job control is not enabled.
-.TP
-\fBtest\fP \fIexpr\fP
-.PD 0
-.TP
-\fB[\fP \fIexpr\fP \fB]\fP
-Return a status of 0 or 1 depending on
-the evaluation of the conditional expression
-.IR expr .
-Each operator and operand must be a separate argument.
-Expressions are composed of the primaries described above under
-.SM
-.BR "CONDITIONAL EXPRESSIONS" .
-\fBtest\fP does not accept any options, nor does it accept and ignore
-an argument of \fB\-\-\fP as signifying the end of options.
-.if t .sp 0.5
-.if n .sp 1
-Expressions may be combined using the following operators, listed
-in decreasing order of precedence.
-The evaluation depends on the number of arguments; see below.
-Operator precedence is used when there are five or more arguments.
-.RS
-.PD 0
-.TP
-.B ! \fIexpr\fP
-True if
-.I expr
-is false.
-.TP
-.B ( \fIexpr\fP )
-Returns the value of \fIexpr\fP.
-This may be used to override the normal precedence of operators.
-.TP
-\fIexpr1\fP \-\fBa\fP \fIexpr2\fP
-True if both
-.I expr1
-and
-.I expr2
-are true.
-.TP
-\fIexpr1\fP \-\fBo\fP \fIexpr2\fP
-True if either
-.I expr1
-or
-.I expr2
-is true.
-.PD
-.PP
-\fBtest\fP and \fB[\fP evaluate conditional
-expressions using a set of rules based on the number of arguments.
-.if t .sp 0.5
-.if n .sp 1
-.PD 0
-.TP
-0 arguments
-The expression is false.
-.TP
-1 argument
-The expression is true if and only if the argument is not null.
-.TP
-2 arguments
-If the first argument is \fB!\fP, the expression is true if and
-only if the second argument is null.
-If the first argument is one of the unary conditional operators listed above
-under
-.SM
-.BR "CONDITIONAL EXPRESSIONS" ,
-the expression is true if the unary test is true.
-If the first argument is not a valid unary conditional operator, the expression
-is false.
-.TP
-3 arguments
-The following conditions are applied in the order listed.
-If the second argument is one of the binary conditional operators listed above
-under
-.SM
-.BR "CONDITIONAL EXPRESSIONS" ,
-the result of the expression is the result of the binary test using
-the first and third arguments as operands.
-The \fB\-a\fP and \fB\-o\fP operators are considered binary operators
-when there are three arguments.
-If the first argument is \fB!\fP, the value is the negation of
-the two-argument test using the second and third arguments.
-If the first argument is exactly \fB(\fP and the third argument is
-exactly \fB)\fP, the result is the one-argument test of the second
-argument.
-Otherwise, the expression is false.
-.TP
-4 arguments
-If the first argument is \fB!\fP, the result is the negation of
-the three-argument expression composed of the remaining arguments.
-Otherwise, the expression is parsed and evaluated according to
-precedence using the rules listed above.
-.TP
-5 or more arguments
-The expression is parsed and evaluated according to precedence
-using the rules listed above.
-.if t .sp 0.5
-.if n .sp 1
-.LP
-When used with \fBtest\fP or \fB[\fP, the \fB<\fP and \fB>\fP operators
-sort lexicographically using ASCII ordering.
-.RE
-.PD
-.TP
-.B times
-Print the accumulated user and system times for the shell and
-for processes run from the shell. The return status is 0.
-.TP
-\fBtrap\fP [\fB\-lp\fP] [[\fIarg\fP] \fIsigspec\fP ...]
-The command
-.I arg
-is to be read and executed when the shell receives
-signal(s)
-.IR sigspec .
-If
-.I arg
-is absent (and there is a single \fIsigspec\fP) or
-.BR \- ,
-each specified signal is
-reset to its original disposition (the value it had
-upon entrance to the shell).
-If
-.I arg
-is the null string the signal specified by each
-.I sigspec
-is ignored by the shell and by the commands it invokes.
-If
-.I arg
-is not present and
-.B \-p
-has been supplied, then the trap commands associated with each
-.I sigspec
-are displayed.
-If no arguments are supplied or if only
-.B \-p
-is given,
-.B trap
-prints the list of commands associated with each signal.
-The
-.B \-l
-option causes the shell to print a list of signal names and
-their corresponding numbers.
-Each
-.I sigspec
-is either
-a signal name defined in <\fIsignal.h\fP>, or a signal number.
-Signal names are case insensitive and the
-.SM
-.B SIG
-prefix is optional.
-.if t .sp 0.5
-.if n .sp 1
-If a
-.I sigspec
-is
-.SM
-.B EXIT
-(0) the command
-.I arg
-is executed on exit from the shell.
-If a
-.I sigspec
-is
-.SM
-.BR DEBUG ,
-the command
-.I arg
-is executed before every \fIsimple command\fP, \fIfor\fP command,
-\fIcase\fP command, \fIselect\fP command, every arithmetic \fIfor\fP
-command, and before the first command executes in a shell function (see
-.SM
-.B SHELL GRAMMAR
-above).
-Refer to the description of the \fBextdebug\fP option to the
-\fBshopt\fP builtin for details of its effect on the \fBDEBUG\fP trap.
-If a
-.I sigspec
-is
-.SM
-.BR RETURN ,
-the command
-.I arg
-is executed each time a shell function or a script executed with
-the \fB.\fP or \fBsource\fP builtins finishes executing.
-.if t .sp 0.5
-.if n .sp 1
-If a
-.I sigspec
-is
-.SM
-.BR ERR ,
-the command
-.I arg
-is executed whenever a simple command has a non\-zero exit status,
-subject to the following conditions.
-The
-.SM
-.B ERR
-trap is not executed if the failed
-command is part of the command list immediately following a
-.B while
-or
-.B until
-keyword,
-part of the test in an
-.I if
-statement, part of a command executed in a
-.B &&
-or
-.B ||
-list, or if the command's return value is
-being inverted via
-.BR ! .
-These are the same conditions obeyed by the \fBerrexit\fP option.
-.if t .sp 0.5
-.if n .sp 1
-Signals ignored upon entry to the shell cannot be trapped or reset.
-Trapped signals that are not being ignored are reset to their original
-values in a subshell or subshell environment when one is created.
-The return status is false if any
-.I sigspec
-is invalid; otherwise
-.B trap
-returns true.
-.TP
-\fBtype\fP [\fB\-aftpP\fP] \fIname\fP [\fIname\fP ...]
-With no options,
-indicate how each
-.I name
-would be interpreted if used as a command name.
-If the
-.B \-t
-option is used,
-.B type
-prints a string which is one of
-.IR alias ,
-.IR keyword ,
-.IR function ,
-.IR builtin ,
-or
-.I file
-if
-.I name
-is an alias, shell reserved word, function, builtin, or disk file,
-respectively.
-If the
-.I name
-is not found, then nothing is printed, and an exit status of false
-is returned.
-If the
-.B \-p
-option is used,
-.B type
-either returns the name of the disk file
-that would be executed if
-.I name
-were specified as a command name,
-or nothing if
-.if t \f(CWtype -t name\fP
-.if n ``type -t name''
-would not return
-.IR file .
-The
-.B \-P
-option forces a
-.SM
-.B PATH
-search for each \fIname\fP, even if
-.if t \f(CWtype -t name\fP
-.if n ``type -t name''
-would not return
-.IR file .
-If a command is hashed,
-.B \-p
-and
-.B \-P
-print the hashed value, not necessarily the file that appears
-first in
-.SM
-.BR PATH .
-If the
-.B \-a
-option is used,
-.B type
-prints all of the places that contain
-an executable named
-.IR name .
-This includes aliases and functions,
-if and only if the
-.B \-p
-option is not also used.
-The table of hashed commands is not consulted
-when using
-.BR \-a .
-The
-.B \-f
-option suppresses shell function lookup, as with the \fBcommand\fP builtin.
-.B type
-returns true if all of the arguments are found, false if
-any are not found.
-.TP
-\fBulimit\fP [\fB\-HSTabcdefilmnpqrstuvx\fP [\fIlimit\fP]]
-Provides control over the resources available to the shell and to
-processes started by it, on systems that allow such control.
-The \fB\-H\fP and \fB\-S\fP options specify that the hard or soft limit is
-set for the given resource.
-A hard limit cannot be increased by a non-root user once it is set;
-a soft limit may be increased up to the value of the hard limit.
-If neither \fB\-H\fP nor \fB\-S\fP is specified, both the soft and hard
-limits are set.
-The value of
-.I limit
-can be a number in the unit specified for the resource
-or one of the special values
-.BR hard ,
-.BR soft ,
-or
-.BR unlimited ,
-which stand for the current hard limit, the current soft limit, and
-no limit, respectively.
-If
-.I limit
-is omitted, the current value of the soft limit of the resource is
-printed, unless the \fB\-H\fP option is given. When more than one
-resource is specified, the limit name and unit are printed before the value.
-Other options are interpreted as follows:
-.RS
-.PD 0
-.TP
-.B \-a
-All current limits are reported
-.TP
-.B \-b
-The maximum socket buffer size
-.TP
-.B \-c
-The maximum size of core files created
-.TP
-.B \-d
-The maximum size of a process's data segment
-.TP
-.B \-e
-The maximum scheduling priority ("nice")
-.TP
-.B \-f
-The maximum size of files written by the shell and its children
-.TP
-.B \-i
-The maximum number of pending signals
-.TP
-.B \-l
-The maximum size that may be locked into memory
-.TP
-.B \-m
-The maximum resident set size (many systems do not honor this limit)
-.TP
-.B \-n
-The maximum number of open file descriptors (most systems do not
-allow this value to be set)
-.TP
-.B \-p
-The pipe size in 512-byte blocks (this may not be set)
-.TP
-.B \-q
-The maximum number of bytes in POSIX message queues
-.TP
-.B \-r
-The maximum real-time scheduling priority
-.TP
-.B \-s
-The maximum stack size
-.TP
-.B \-t
-The maximum amount of cpu time in seconds
-.TP
-.B \-u
-The maximum number of processes available to a single user
-.TP
-.B \-v
-The maximum amount of virtual memory available to the shell and, on
-some systems, to its children
-.TP
-.B \-x
-The maximum number of file locks
-.TP
-.B \-T
-The maximum number of threads
-.PD
-.PP
-If
-.I limit
-is given, it is the new value of the specified resource (the
-.B \-a
-option is display only).
-If no option is given, then
-.B \-f
-is assumed. Values are in 1024-byte increments, except for
-.BR \-t ,
-which is in seconds,
-.BR \-p ,
-which is in units of 512-byte blocks,
-and
-.BR \-T ,
-.BR \-b ,
-.BR \-n ,
-and
-.BR \-u ,
-which are unscaled values.
-The return status is 0 unless an invalid option or argument is supplied,
-or an error occurs while setting a new limit.
-.RE
-.TP
-\fBumask\fP [\fB\-p\fP] [\fB\-S\fP] [\fImode\fP]
-The user file-creation mask is set to
-.IR mode .
-If
-.I mode
-begins with a digit, it
-is interpreted as an octal number; otherwise
-it is interpreted as a symbolic mode mask similar
-to that accepted by
-.IR chmod (1).
-If
-.I mode
-is omitted, the current value of the mask is printed.
-The
-.B \-S
-option causes the mask to be printed in symbolic form; the
-default output is an octal number.
-If the
-.B \-p
-option is supplied, and
-.I mode
-is omitted, the output is in a form that may be reused as input.
-The return status is 0 if the mode was successfully changed or if
-no \fImode\fP argument was supplied, and false otherwise.
-.TP
-\fBunalias\fP [\-\fBa\fP] [\fIname\fP ...]
-Remove each \fIname\fP from the list of defined aliases. If
-.B \-a
-is supplied, all alias definitions are removed. The return
-value is true unless a supplied
-.I name
-is not a defined alias.
-.TP
-\fBunset\fP [\-\fBfv\fP] [\fIname\fP ...]
-For each
-.IR name ,
-remove the corresponding variable or function.
-If the
-.B \-v
-option is given, each
-.I name
-refers to a shell variable, and that variable is removed.
-Read-only variables may not be unset.
-If
-.B \-f
-is specified, each
-.I name
-refers to a shell function, and the function definition
-is removed.
-If no options are supplied, each \fIname\fP refers to a variable; if
-there is no variable by that name, any function with that name is
-unset.
-Each unset variable or function is removed from the environment
-passed to subsequent commands.
-If any of
-.SM
-.BR COMP_WORDBREAKS ,
-.SM
-.BR RANDOM ,
-.SM
-.BR SECONDS ,
-.SM
-.BR LINENO ,
-.SM
-.BR HISTCMD ,
-.SM
-.BR FUNCNAME ,
-.SM
-.BR GROUPS ,
-or
-.SM
-.B DIRSTACK
-are unset, they lose their special properties, even if they are
-subsequently reset. The exit status is true unless a
-.I name
-is readonly.
-.TP
-\fBwait\fP [\fIn ...\fP]
-Wait for each specified process and return its termination status.
-Each
-.I n
-may be a process
-ID or a job specification; if a job spec is given, all processes
-in that job's pipeline are waited for. If
-.I n
-is not given, all currently active child processes
-are waited for, and the return status is zero. If
-.I n
-specifies a non-existent process or job, the return status is
-127. Otherwise, the return status is the exit status of the last
-process or job waited for.
-.\" bash_builtins
-.if \n(zZ=1 .ig zZ
-.SH "RESTRICTED SHELL"
-.\" rbash.1
-.zY
-.PP
-If
-.B bash
-is started with the name
-.BR rbash ,
-or the
-.B \-r
-option is supplied at invocation,
-the shell becomes restricted.
-A restricted shell is used to
-set up an environment more controlled than the standard shell.
-It behaves identically to
-.B bash
-with the exception that the following are disallowed or not performed:
-.IP \(bu
-changing directories with \fBcd\fP
-.IP \(bu
-setting or unsetting the values of
-.SM
-.BR SHELL ,
-.SM
-.BR PATH ,
-.SM
-.BR ENV ,
-or
-.SM
-.B BASH_ENV
-.IP \(bu
-specifying command names containing
-.B /
-.IP \(bu
-specifying a file name containing a
-.B /
-as an argument to the
-.B .
-builtin command
-.IP \(bu
-specifying a filename containing a slash as an argument to the
-.B \-p
-option to the
-.B hash
-builtin command
-.IP \(bu
-importing function definitions from the shell environment at startup
-.IP \(bu
-parsing the value of
-.SM
-.B SHELLOPTS
-from the shell environment at startup
-.IP \(bu
-redirecting output using the >, >|, <>, >&, &>, and >> redirection operators
-.IP \(bu
-using the
-.B exec
-builtin command to replace the shell with another command
-.IP \(bu
-adding or deleting builtin commands with the
-.B \-f
-and
-.B \-d
-options to the
-.B enable
-builtin command
-.IP \(bu
-using the \fBenable\fP builtin command to enable disabled shell builtins
-.IP \(bu
-specifying the
-.B \-p
-option to the
-.B command
-builtin command
-.IP \(bu
-turning off restricted mode with
-\fBset +r\fP or \fBset +o restricted\fP.
-.PP
-These restrictions are enforced after any startup files are read.
-.PP
-.ie \n(zY=1 When a command that is found to be a shell script is executed,
-.el \{ When a command that is found to be a shell script is executed
-(see
-.SM
-.B "COMMAND EXECUTION"
-above),
-\}
-.B rbash
-turns off any restrictions in the shell spawned to execute the
-script.
-.\" end of rbash.1
-.if \n(zY=1 .ig zY
-.SH "SEE ALSO"
-.PD 0
-.TP
-\fIBash Reference Manual\fP, Brian Fox and Chet Ramey
-.TP
-\fIThe Gnu Readline Library\fP, Brian Fox and Chet Ramey
-.TP
-\fIThe Gnu History Library\fP, Brian Fox and Chet Ramey
-.TP
-\fIPortable Operating System Interface (POSIX) Part 2: Shell and Utilities\fP, IEEE
-.TP
-\fIsh\fP(1), \fIksh\fP(1), \fIcsh\fP(1)
-.TP
-\fIemacs\fP(1), \fIvi\fP(1)
-.TP
-\fIreadline\fP(3)
-.PD
-.SH FILES
-.PD 0
-.TP
-.FN /bin/bash
-The \fBbash\fP executable
-.TP
-.FN /etc/profile
-The systemwide initialization file, executed for login shells
-.TP
-.FN ~/.bash_profile
-The personal initialization file, executed for login shells
-.TP
-.FN ~/.bashrc
-The individual per-interactive-shell startup file
-.TP
-.FN ~/.bash_logout
-The individual login shell cleanup file, executed when a login shell exits
-.TP
-.FN ~/.inputrc
-Individual \fIreadline\fP initialization file
-.PD
-.SH AUTHORS
-Brian Fox, Free Software Foundation
-.br
-bfox@gnu.org
-.PP
-Chet Ramey, Case Western Reserve University
-.br
-chet.ramey@case.edu
-.SH BUG REPORTS
-If you find a bug in
-.B bash,
-you should report it. But first, you should
-make sure that it really is a bug, and that it appears in the latest
-version of
-.BR bash .
-The latest version is always available from
-\fIftp://ftp.gnu.org/pub/gnu/bash/\fP.
-.PP
-Once you have determined that a bug actually exists, use the
-.I bashbug
-command to submit a bug report.
-If you have a fix, you are encouraged to mail that as well!
-Suggestions and `philosophical' bug reports may be mailed
-to \fIbug-bash@gnu.org\fP or posted to the Usenet
-newsgroup
-.BR gnu.bash.bug .
-.PP
-ALL bug reports should include:
-.PP
-.PD 0
-.TP 20
-The version number of \fBbash\fR
-.TP
-The hardware and operating system
-.TP
-The compiler used to compile
-.TP
-A description of the bug behaviour
-.TP
-A short script or `recipe' which exercises the bug
-.PD
-.PP
-.I bashbug
-inserts the first three items automatically into the template
-it provides for filing a bug report.
-.PP
-Comments and bug reports concerning
-this manual page should be directed to
-.IR chet.ramey@case.edu .
-.SH BUGS
-.PP
-It's too big and too slow.
-.PP
-There are some subtle differences between
-.B bash
-and traditional versions of
-.BR sh ,
-mostly because of the
-.SM
-.B POSIX
-specification.
-.PP
-Aliases are confusing in some uses.
-.PP
-Shell builtin commands and functions are not stoppable/restartable.
-.PP
-Compound commands and command sequences of the form `a ; b ; c'
-are not handled gracefully when process suspension is attempted.
-When a process is stopped, the shell immediately executes the next
-command in the sequence.
-It suffices to place the sequence of commands between
-parentheses to force it into a subshell, which may be stopped as
-a unit.
-.PP
-Array variables may not (yet) be exported.
-.PP
-There may be only one active coprocess at a time.
-.zZ
-.zY
+++ /dev/null
-\input texinfo.tex @c -*- texinfo -*-
-@c %**start of header
-@setfilename bashref.info
-@settitle Bash Reference Manual
-@c %**end of header
-
-@setchapternewpage odd
-
-@include version.texi
-
-@copying
-This text is a brief description of the features that are present in
-the Bash shell (version @value{VERSION}, @value{UPDATED}).
-
-This is Edition @value{EDITION}, last updated @value{UPDATED},
-of @cite{The GNU Bash Reference Manual},
-for @code{Bash}, Version @value{VERSION}.
-
-Copyright @copyright{} 1988--2011 Free Software Foundation, Inc.
-
-Permission is granted to make and distribute verbatim copies of
-this manual provided the copyright notice and this permission notice
-are preserved on all copies.
-
-@quotation
-Permission is granted to copy, distribute and/or modify this document
-under the terms of the GNU Free Documentation License, Version 1.3 or
-any later version published by the Free Software Foundation; with no
-Invariant Sections, with the Front-Cover texts being ``A GNU Manual'',
-and with the Back-Cover Texts as in (a) below. A copy of the license is
-included in the section entitled ``GNU Free Documentation License''.
-
-(a) The FSF's Back-Cover Text is: You are free to copy and modify
-this GNU manual. Buying copies from GNU Press supports the FSF in
-developing GNU and promoting software freedom.''
-
-@end quotation
-@end copying
-
-@defcodeindex bt
-@defcodeindex rw
-@set BashFeatures
-
-@dircategory Basics
-@direntry
-* Bash: (bash). The GNU Bourne-Again SHell.
-@end direntry
-
-@finalout
-
-@titlepage
-@title Bash Reference Manual
-@subtitle Reference Documentation for Bash
-@subtitle Edition @value{EDITION}, for @code{Bash} Version @value{VERSION}.
-@subtitle @value{UPDATED-MONTH}
-@author Chet Ramey, Case Western Reserve University
-@author Brian Fox, Free Software Foundation
-
-@page
-@vskip 0pt plus 1filll
-@insertcopying
-
-@sp 1
-Published by the Free Software Foundation @*
-59 Temple Place, Suite 330, @*
-Boston, MA 02111-1307 @*
-USA @*
-
-@end titlepage
-
-@contents
-
-@ifnottex
-@node Top, Introduction, (dir), (dir)
-@top Bash Features
-
-This text is a brief description of the features that are present in
-the Bash shell (version @value{VERSION}, @value{UPDATED}).
-
-This is Edition @value{EDITION}, last updated @value{UPDATED},
-of @cite{The GNU Bash Reference Manual},
-for @code{Bash}, Version @value{VERSION}.
-
-Bash contains features that appear in other popular shells, and some
-features that only appear in Bash. Some of the shells that Bash has
-borrowed concepts from are the Bourne Shell (@file{sh}), the Korn Shell
-(@file{ksh}), and the C-shell (@file{csh} and its successor,
-@file{tcsh}). The following menu breaks the features up into
-categories based upon which one of these other shells inspired the
-feature.
-
-This manual is meant as a brief introduction to features found in
-Bash. The Bash manual page should be used as the definitive
-reference on shell behavior.
-
-@menu
-* Introduction:: An introduction to the shell.
-* Definitions:: Some definitions used in the rest of this
- manual.
-* Basic Shell Features:: The shell "building blocks".
-* Shell Builtin Commands:: Commands that are a part of the shell.
-* Shell Variables:: Variables used or set by Bash.
-* Bash Features:: Features found only in Bash.
-* Job Control:: What job control is and how Bash allows you
- to use it.
-* Command Line Editing:: Chapter describing the command line
- editing features.
-* Using History Interactively:: Command History Expansion
-* Installing Bash:: How to build and install Bash on your system.
-* Reporting Bugs:: How to report bugs in Bash.
-* Major Differences From The Bourne Shell:: A terse list of the differences
- between Bash and historical
- versions of /bin/sh.
-* GNU Free Documentation License:: Copying and sharing this documentation.
-* Indexes:: Various indexes for this manual.
-@end menu
-@end ifnottex
-
-@node Introduction
-@chapter Introduction
-@menu
-* What is Bash?:: A short description of Bash.
-* What is a shell?:: A brief introduction to shells.
-@end menu
-
-@node What is Bash?
-@section What is Bash?
-
-Bash is the shell, or command language interpreter,
-for the @sc{gnu} operating system.
-The name is an acronym for the @samp{Bourne-Again SHell},
-a pun on Stephen Bourne, the author of the direct ancestor of
-the current Unix shell @code{sh},
-which appeared in the Seventh Edition Bell Labs Research version
-of Unix.
-
-Bash is largely compatible with @code{sh} and incorporates useful
-features from the Korn shell @code{ksh} and the C shell @code{csh}.
-It is intended to be a conformant implementation of the @sc{ieee}
-@sc{posix} Shell and Tools portion of the @sc{ieee} @sc{posix}
-specification (@sc{ieee} Standard 1003.1).
-It offers functional improvements over @code{sh} for both interactive and
-programming use.
-
-While the @sc{gnu} operating system provides other shells, including
-a version of @code{csh}, Bash is the default shell.
-Like other @sc{gnu} software, Bash is quite portable. It currently runs
-on nearly every version of Unix and a few other operating systems @minus{}
-independently-supported ports exist for @sc{ms-dos}, @sc{os/2},
-and Windows platforms.
-
-@node What is a shell?
-@section What is a shell?
-
-At its base, a shell is simply a macro processor that executes
-commands. The term macro processor means functionality where text
-and symbols are expanded to create larger expressions.
-
-A Unix shell is both a command interpreter and a programming
-language. As a command interpreter, the shell provides the user
-interface to the rich set of @sc{gnu} utilities. The programming
-language features allow these utilities to be combined.
-Files containing commands can be created, and become
-commands themselves. These new commands have the same status as
-system commands in directories such as @file{/bin}, allowing users
-or groups to establish custom environments to automate their common
-tasks.
-
-Shells may be used interactively or non-interactively. In
-interactive mode, they accept input typed from the keyboard.
-When executing non-interactively, shells execute commands read
-from a file.
-
-A shell allows execution of @sc{gnu} commands, both synchronously and
-asynchronously.
-The shell waits for synchronous commands to complete before accepting
-more input; asynchronous commands continue to execute in parallel
-with the shell while it reads and executes additional commands.
-The @dfn{redirection} constructs permit
-fine-grained control of the input and output of those commands.
-Moreover, the shell allows control over the contents of commands'
-environments.
-
-Shells also provide a small set of built-in
-commands (@dfn{builtins}) implementing functionality impossible
-or inconvenient to obtain via separate utilities.
-For example, @code{cd}, @code{break}, @code{continue}, and
-@code{exec} cannot be implemented outside of the shell because
-they directly manipulate the shell itself.
-The @code{history}, @code{getopts}, @code{kill}, or @code{pwd}
-builtins, among others, could be implemented in separate utilities,
-but they are more convenient to use as builtin commands.
-All of the shell builtins are described in
-subsequent sections.
-
-While executing commands is essential, most of the power (and
-complexity) of shells is due to their embedded programming
-languages. Like any high-level language, the shell provides
-variables, flow control constructs, quoting, and functions.
-
-Shells offer features geared specifically for
-interactive use rather than to augment the programming language.
-These interactive features include job control, command line
-editing, command history and aliases. Each of these features is
-described in this manual.
-
-@node Definitions
-@chapter Definitions
-These definitions are used throughout the remainder of this manual.
-
-@table @code
-
-@item POSIX
-@cindex POSIX
-A family of open system standards based on Unix. Bash
-is primarily concerned with the Shell and Utilities portion of the
-@sc{posix} 1003.1 standard.
-
-@item blank
-A space or tab character.
-
-@item builtin
-@cindex builtin
-A command that is implemented internally by the shell itself, rather
-than by an executable program somewhere in the file system.
-
-@item control operator
-@cindex control operator
-A @code{token} that performs a control function. It is a @code{newline}
-or one of the following:
-@samp{||}, @samp{&&}, @samp{&}, @samp{;}, @samp{;;},
-@samp{|}, @samp{|&}, @samp{(}, or @samp{)}.
-
-@item exit status
-@cindex exit status
-The value returned by a command to its caller. The value is restricted
-to eight bits, so the maximum value is 255.
-
-@item field
-@cindex field
-A unit of text that is the result of one of the shell expansions. After
-expansion, when executing a command, the resulting fields are used as
-the command name and arguments.
-
-@item filename
-@cindex filename
-A string of characters used to identify a file.
-
-@item job
-@cindex job
-A set of processes comprising a pipeline, and any processes descended
-from it, that are all in the same process group.
-
-@item job control
-@cindex job control
-A mechanism by which users can selectively stop (suspend) and restart
-(resume) execution of processes.
-
-@item metacharacter
-@cindex metacharacter
-A character that, when unquoted, separates words. A metacharacter is
-a @code{blank} or one of the following characters:
-@samp{|}, @samp{&}, @samp{;}, @samp{(}, @samp{)}, @samp{<}, or
-@samp{>}.
-
-@item name
-@cindex name
-@cindex identifier
-A @code{word} consisting solely of letters, numbers, and underscores,
-and beginning with a letter or underscore. @code{Name}s are used as
-shell variable and function names.
-Also referred to as an @code{identifier}.
-
-@item operator
-@cindex operator, shell
-A @code{control operator} or a @code{redirection operator}.
-@xref{Redirections}, for a list of redirection operators.
-Operators contain at least one unquoted @code{metacharacter}.
-
-@item process group
-@cindex process group
-A collection of related processes each having the same process
-group @sc{id}.
-
-@item process group ID
-@cindex process group ID
-A unique identifier that represents a @code{process group}
-during its lifetime.
-
-@item reserved word
-@cindex reserved word
-A @code{word} that has a special meaning to the shell. Most reserved
-words introduce shell flow control constructs, such as @code{for} and
-@code{while}.
-
-@item return status
-@cindex return status
-A synonym for @code{exit status}.
-
-@item signal
-@cindex signal
-A mechanism by which a process may be notified by the kernel
-of an event occurring in the system.
-
-@item special builtin
-@cindex special builtin
-A shell builtin command that has been classified as special by the
-@sc{posix} standard.
-
-@item token
-@cindex token
-A sequence of characters considered a single unit by the shell.
-It is either a @code{word} or an @code{operator}.
-
-@item word
-@cindex word
-A sequence of characters treated as a unit by the shell.
-Words may not include unquoted @code{metacharacters}.
-@end table
-
-@node Basic Shell Features
-@chapter Basic Shell Features
-@cindex Bourne shell
-
-Bash is an acronym for @samp{Bourne-Again SHell}.
-The Bourne shell is
-the traditional Unix shell originally written by Stephen Bourne.
-All of the Bourne shell builtin commands are available in Bash,
-The rules for evaluation and quoting are taken from the @sc{posix}
-specification for the `standard' Unix shell.
-
-This chapter briefly summarizes the shell's `building blocks':
-commands, control structures, shell functions, shell @i{parameters},
-shell expansions,
-@i{redirections}, which are a way to direct input and output from
-and to named files, and how the shell executes commands.
-
-@menu
-* Shell Syntax:: What your input means to the shell.
-* Shell Commands:: The types of commands you can use.
-* Shell Functions:: Grouping commands by name.
-* Shell Parameters:: How the shell stores values.
-* Shell Expansions:: How Bash expands parameters and the various
- expansions available.
-* Redirections:: A way to control where input and output go.
-* Executing Commands:: What happens when you run a command.
-* Shell Scripts:: Executing files of shell commands.
-@end menu
-
-@node Shell Syntax
-@section Shell Syntax
-@menu
-* Shell Operation:: The basic operation of the shell.
-* Quoting:: How to remove the special meaning from characters.
-* Comments:: How to specify comments.
-@end menu
-
-When the shell reads input, it proceeds through a
-sequence of operations. If the input indicates the beginning of a
-comment, the shell ignores the comment symbol (@samp{#}), and the rest
-of that line.
-
-Otherwise, roughly speaking, the shell reads its input and
-divides the input into words and operators, employing the quoting rules
-to select which meanings to assign various words and characters.
-
-The shell then parses these tokens into commands and other constructs,
-removes the special meaning of certain words or characters, expands
-others, redirects input and output as needed, executes the specified
-command, waits for the command's exit status, and makes that exit status
-available for further inspection or processing.
-
-@node Shell Operation
-@subsection Shell Operation
-
-The following is a brief description of the shell's operation when it
-reads and executes a command. Basically, the shell does the
-following:
-
-@enumerate
-@item
-Reads its input from a file (@pxref{Shell Scripts}), from a string
-supplied as an argument to the @option{-c} invocation option
-(@pxref{Invoking Bash}), or from the user's terminal.
-
-@item
-Breaks the input into words and operators, obeying the quoting rules
-described in @ref{Quoting}. These tokens are separated by
-@code{metacharacters}. Alias expansion is performed by this step
-(@pxref{Aliases}).
-
-@item
-Parses the tokens into simple and compound commands
-(@pxref{Shell Commands}).
-
-@item
-Performs the various shell expansions (@pxref{Shell Expansions}), breaking
-the expanded tokens into lists of filenames (@pxref{Filename Expansion})
-and commands and arguments.
-
-@item
-Performs any necessary redirections (@pxref{Redirections}) and removes
-the redirection operators and their operands from the argument list.
-
-@item
-Executes the command (@pxref{Executing Commands}).
-
-@item
-Optionally waits for the command to complete and collects its exit
-status (@pxref{Exit Status}).
-
-@end enumerate
-
-@node Quoting
-@subsection Quoting
-@cindex quoting
-@menu
-* Escape Character:: How to remove the special meaning from a single
- character.
-* Single Quotes:: How to inhibit all interpretation of a sequence
- of characters.
-* Double Quotes:: How to suppress most of the interpretation of a
- sequence of characters.
-* ANSI-C Quoting:: How to expand ANSI-C sequences in quoted strings.
-* Locale Translation:: How to translate strings into different languages.
-@end menu
-
-Quoting is used to remove the special meaning of certain
-characters or words to the shell. Quoting can be used to
-disable special treatment for special characters, to prevent
-reserved words from being recognized as such, and to prevent
-parameter expansion.
-
-Each of the shell metacharacters (@pxref{Definitions})
-has special meaning to the shell and must be quoted if it is to
-represent itself.
-When the command history expansion facilities are being used
-(@pxref{History Interaction}), the
-@var{history expansion} character, usually @samp{!}, must be quoted
-to prevent history expansion. @xref{Bash History Facilities}, for
-more details concerning history expansion.
-
-There are three quoting mechanisms: the
-@var{escape character}, single quotes, and double quotes.
-
-@node Escape Character
-@subsubsection Escape Character
-A non-quoted backslash @samp{\} is the Bash escape character.
-It preserves the literal value of the next character that follows,
-with the exception of @code{newline}. If a @code{\newline} pair
-appears, and the backslash itself is not quoted, the @code{\newline}
-is treated as a line continuation (that is, it is removed from
-the input stream and effectively ignored).
-
-@node Single Quotes
-@subsubsection Single Quotes
-
-Enclosing characters in single quotes (@samp{'}) preserves the literal value
-of each character within the quotes. A single quote may not occur
-between single quotes, even when preceded by a backslash.
-
-@node Double Quotes
-@subsubsection Double Quotes
-
-Enclosing characters in double quotes (@samp{"}) preserves the literal value
-of all characters within the quotes, with the exception of
-@samp{$}, @samp{`}, @samp{\},
-and, when history expansion is enabled, @samp{!}.
-The characters @samp{$} and @samp{`}
-retain their special meaning within double quotes (@pxref{Shell Expansions}).
-The backslash retains its special meaning only when followed by one of
-the following characters:
-@samp{$}, @samp{`}, @samp{"}, @samp{\}, or @code{newline}.
-Within double quotes, backslashes that are followed by one of these
-characters are removed. Backslashes preceding characters without a
-special meaning are left unmodified.
-A double quote may be quoted within double quotes by preceding it with
-a backslash.
-If enabled, history expansion will be performed unless an @samp{!}
-appearing in double quotes is escaped using a backslash.
-The backslash preceding the @samp{!} is not removed.
-
-The special parameters @samp{*} and @samp{@@} have special meaning
-when in double quotes (@pxref{Shell Parameter Expansion}).
-
-@node ANSI-C Quoting
-@subsubsection ANSI-C Quoting
-@cindex quoting, ANSI
-
-Words of the form @code{$'@var{string}'} are treated specially. The
-word expands to @var{string}, with backslash-escaped characters replaced
-as specified by the ANSI C standard. Backslash escape sequences, if
-present, are decoded as follows:
-
-@table @code
-@item \a
-alert (bell)
-@item \b
-backspace
-@item \e
-@itemx \E
-an escape character (not ANSI C)
-@item \f
-form feed
-@item \n
-newline
-@item \r
-carriage return
-@item \t
-horizontal tab
-@item \v
-vertical tab
-@item \\
-backslash
-@item \'
-single quote
-@item \"
-double quote
-@item \@var{nnn}
-the eight-bit character whose value is the octal value @var{nnn}
-(one to three digits)
-@item \x@var{HH}
-the eight-bit character whose value is the hexadecimal value @var{HH}
-(one or two hex digits)
-@item \u@var{HHHH}
-the Unicode (ISO/IEC 10646) character whose value is the hexadecimal value
-@var{HHHH} (one to four hex digits)
-@item \U@var{HHHHHHHH}
-the Unicode (ISO/IEC 10646) character whose value is the hexadecimal value
-@var{HHHHHHHH} (one to eight hex digits)
-@item \c@var{x}
-a control-@var{x} character
-@end table
-
-@noindent
-The expanded result is single-quoted, as if the dollar sign had not
-been present.
-
-@node Locale Translation
-@subsubsection Locale-Specific Translation
-@cindex localization
-@cindex internationalization
-@cindex native languages
-@cindex translation, native languages
-
-A double-quoted string preceded by a dollar sign (@samp{$}) will cause
-the string to be translated according to the current locale.
-If the current locale is @code{C} or @code{POSIX}, the dollar sign
-is ignored.
-If the string is translated and replaced, the replacement is
-double-quoted.
-
-@vindex LC_MESSAGES
-@vindex TEXTDOMAIN
-@vindex TEXTDOMAINDIR
-Some systems use the message catalog selected by the @env{LC_MESSAGES}
-shell variable. Others create the name of the message catalog from the
-value of the @env{TEXTDOMAIN} shell variable, possibly adding a
-suffix of @samp{.mo}. If you use the @env{TEXTDOMAIN} variable, you
-may need to set the @env{TEXTDOMAINDIR} variable to the location of
-the message catalog files. Still others use both variables in this
-fashion:
-@env{TEXTDOMAINDIR}/@env{LC_MESSAGES}/LC_MESSAGES/@env{TEXTDOMAIN}.mo.
-
-@node Comments
-@subsection Comments
-@cindex comments, shell
-
-In a non-interactive shell, or an interactive shell in which the
-@code{interactive_comments} option to the @code{shopt}
-builtin is enabled (@pxref{The Shopt Builtin}),
-a word beginning with @samp{#}
-causes that word and all remaining characters on that line to
-be ignored. An interactive shell without the @code{interactive_comments}
-option enabled does not allow comments. The @code{interactive_comments}
-option is on by default in interactive shells.
-@xref{Interactive Shells}, for a description of what makes
-a shell interactive.
-
-@node Shell Commands
-@section Shell Commands
-@cindex commands, shell
-
-A simple shell command such as @code{echo a b c} consists of the command
-itself followed by arguments, separated by spaces.
-
-More complex shell commands are composed of simple commands arranged together
-in a variety of ways: in a pipeline in which the output of one command
-becomes the input of a second, in a loop or conditional construct, or in
-some other grouping.
-
-@menu
-* Simple Commands:: The most common type of command.
-* Pipelines:: Connecting the input and output of several
- commands.
-* Lists:: How to execute commands sequentially.
-* Compound Commands:: Shell commands for control flow.
-* Coprocesses:: Two-way communication between commands.
-* GNU Parallel:: Running commands in parallel.
-@end menu
-
-@node Simple Commands
-@subsection Simple Commands
-@cindex commands, simple
-
-A simple command is the kind of command encountered most often.
-It's just a sequence of words separated by @code{blank}s, terminated
-by one of the shell's control operators (@pxref{Definitions}). The
-first word generally specifies a command to be executed, with the
-rest of the words being that command's arguments.
-
-The return status (@pxref{Exit Status}) of a simple command is
-its exit status as provided
-by the @sc{posix} 1003.1 @code{waitpid} function, or 128+@var{n} if
-the command was terminated by signal @var{n}.
-
-@node Pipelines
-@subsection Pipelines
-@cindex pipeline
-@cindex commands, pipelines
-
-A @code{pipeline} is a sequence of simple commands separated by one of
-the control operators @samp{|} or @samp{|&}.
-
-@rwindex time
-@rwindex !
-@cindex command timing
-The format for a pipeline is
-@example
-[@code{time} [@code{-p}]] [@code{!}] @var{command1} [ [@code{|} or @code{|&}] @var{command2} @dots{}]
-@end example
-
-@noindent
-The output of each command in the pipeline is connected via a pipe
-to the input of the next command.
-That is, each command reads the previous command's output. This
-connection is performed before any redirections specified by the
-command.
-
-If @samp{|&} is used, the standard error of @var{command1} is connected to
-@var{command2}'s standard input through the pipe; it is shorthand for
-@code{2>&1 |}. This implicit redirection of the standard error is
-performed after any redirections specified by the command.
-
-The reserved word @code{time} causes timing statistics
-to be printed for the pipeline once it finishes.
-The statistics currently consist of elapsed (wall-clock) time and
-user and system time consumed by the command's execution.
-The @option{-p} option changes the output format to that specified
-by @sc{posix}.
-When the shell is in @sc{posix} mode (@pxref{Bash POSIX Mode}),
-it does not recognize @code{time} as a reserved word if the next
-token begins with a @samp{-}.
-The @env{TIMEFORMAT} variable may be set to a format string that
-specifies how the timing information should be displayed.
-@xref{Bash Variables}, for a description of the available formats.
-The use of @code{time} as a reserved word permits the timing of
-shell builtins, shell functions, and pipelines. An external
-@code{time} command cannot time these easily.
-
-When the shell is in @sc{posix} mode (@pxref{Bash POSIX Mode}), @code{time}
-may be followed by a newline. In this case, the shell displays the
-total user and system time consumed by the shell and its children.
-The @env{TIMEFORMAT} variable may be used to specify the format of
-the time information.
-
-If the pipeline is not executed asynchronously (@pxref{Lists}), the
-shell waits for all commands in the pipeline to complete.
-
-Each command in a pipeline is executed in its own subshell
-(@pxref{Command Execution Environment}). The exit
-status of a pipeline is the exit status of the last command in the
-pipeline, unless the @code{pipefail} option is enabled
-(@pxref{The Set Builtin}).
-If @code{pipefail} is enabled, the pipeline's return status is the
-value of the last (rightmost) command to exit with a non-zero status,
-or zero if all commands exit successfully.
-If the reserved word @samp{!} precedes the pipeline, the
-exit status is the logical negation of the exit status as described
-above.
-The shell waits for all commands in the pipeline to terminate before
-returning a value.
-
-@node Lists
-@subsection Lists of Commands
-@cindex commands, lists
-
-A @code{list} is a sequence of one or more pipelines separated by one
-of the operators @samp{;}, @samp{&}, @samp{&&}, or @samp{||},
-and optionally terminated by one of @samp{;}, @samp{&}, or a
-@code{newline}.
-
-Of these list operators, @samp{&&} and @samp{||}
-have equal precedence, followed by @samp{;} and @samp{&},
-which have equal precedence.
-
-A sequence of one or more newlines may appear in a @code{list}
-to delimit commands, equivalent to a semicolon.
-
-If a command is terminated by the control operator @samp{&},
-the shell executes the command asynchronously in a subshell.
-This is known as executing the command in the @var{background}.
-The shell does not wait for the command to finish, and the return
-status is 0 (true).
-When job control is not active (@pxref{Job Control}),
-the standard input for asynchronous commands, in the absence of any
-explicit redirections, is redirected from @code{/dev/null}.
-
-Commands separated by a @samp{;} are executed sequentially; the shell
-waits for each command to terminate in turn. The return status is the
-exit status of the last command executed.
-
-@sc{and} and @sc{or} lists are sequences of one or more pipelines
-separated by the control operators @samp{&&} and @samp{||},
-respectively. @sc{and} and @sc{or} lists are executed with left
-associativity.
-
-An @sc{and} list has the form
-@example
-@var{command1} && @var{command2}
-@end example
-
-@noindent
-@var{command2} is executed if, and only if, @var{command1}
-returns an exit status of zero.
-
-An @sc{or} list has the form
-@example
-@var{command1} || @var{command2}
-@end example
-
-@noindent
-@var{command2} is executed if, and only if, @var{command1}
-returns a non-zero exit status.
-
-The return status of
-@sc{and} and @sc{or} lists is the exit status of the last command
-executed in the list.
-
-@node Compound Commands
-@subsection Compound Commands
-@cindex commands, compound
-
-@menu
-* Looping Constructs:: Shell commands for iterative action.
-* Conditional Constructs:: Shell commands for conditional execution.
-* Command Grouping:: Ways to group commands.
-@end menu
-
-Compound commands are the shell programming constructs.
-Each construct begins with a reserved word or control operator and is
-terminated by a corresponding reserved word or operator.
-Any redirections (@pxref{Redirections}) associated with a compound command
-apply to all commands within that compound command unless explicitly overridden.
-
-In most cases a list of commands in a compound command's description may be
-separated from the rest of the command by one or more newlines, and may be
-followed by a newline in place of a semicolon.
-
-Bash provides looping constructs, conditional commands, and mechanisms
-to group commands and execute them as a unit.
-
-@node Looping Constructs
-@subsubsection Looping Constructs
-@cindex commands, looping
-
-Bash supports the following looping constructs.
-
-Note that wherever a @samp{;} appears in the description of a
-command's syntax, it may be replaced with one or more newlines.
-
-@table @code
-@item until
-@rwindex until
-@rwindex do
-@rwindex done
-The syntax of the @code{until} command is:
-@example
-until @var{test-commands}; do @var{consequent-commands}; done
-@end example
-Execute @var{consequent-commands} as long as
-@var{test-commands} has an exit status which is not zero.
-The return status is the exit status of the last command executed
-in @var{consequent-commands}, or zero if none was executed.
-
-@item while
-@rwindex while
-The syntax of the @code{while} command is:
-@example
-while @var{test-commands}; do @var{consequent-commands}; done
-@end example
-
-Execute @var{consequent-commands} as long as
-@var{test-commands} has an exit status of zero.
-The return status is the exit status of the last command executed
-in @var{consequent-commands}, or zero if none was executed.
-
-@item for
-@rwindex for
-The syntax of the @code{for} command is:
-
-@example
-for @var{name} [ [in [@var{words} @dots{}] ] ; ] do @var{commands}; done
-@end example
-Expand @var{words}, and execute @var{commands} once for each member
-in the resultant list, with @var{name} bound to the current member.
-If @samp{in @var{words}} is not present, the @code{for} command
-executes the @var{commands} once for each positional parameter that is
-set, as if @samp{in "$@@"} had been specified
-(@pxref{Special Parameters}).
-The return status is the exit status of the last command that executes.
-If there are no items in the expansion of @var{words}, no commands are
-executed, and the return status is zero.
-
-An alternate form of the @code{for} command is also supported:
-
-@example
-for (( @var{expr1} ; @var{expr2} ; @var{expr3} )) ; do @var{commands} ; done
-@end example
-First, the arithmetic expression @var{expr1} is evaluated according
-to the rules described below (@pxref{Shell Arithmetic}).
-The arithmetic expression @var{expr2} is then evaluated repeatedly
-until it evaluates to zero.
-Each time @var{expr2} evaluates to a non-zero value, @var{commands} are
-executed and the arithmetic expression @var{expr3} is evaluated.
-If any expression is omitted, it behaves as if it evaluates to 1.
-The return value is the exit status of the last command in @var{commands}
-that is executed, or false if any of the expressions is invalid.
-
-@end table
-
-The @code{break} and @code{continue} builtins (@pxref{Bourne Shell Builtins})
-may be used to control loop execution.
-
-@node Conditional Constructs
-@subsubsection Conditional Constructs
-@cindex commands, conditional
-
-@table @code
-@item if
-@rwindex if
-@rwindex then
-@rwindex else
-@rwindex elif
-@rwindex fi
-The syntax of the @code{if} command is:
-
-@example
-if @var{test-commands}; then
- @var{consequent-commands};
-[elif @var{more-test-commands}; then
- @var{more-consequents};]
-[else @var{alternate-consequents};]
-fi
-@end example
-
-The @var{test-commands} list is executed, and if its return status is zero,
-the @var{consequent-commands} list is executed.
-If @var{test-commands} returns a non-zero status, each @code{elif} list
-is executed in turn, and if its exit status is zero,
-the corresponding @var{more-consequents} is executed and the
-command completes.
-If @samp{else @var{alternate-consequents}} is present, and
-the final command in the final @code{if} or @code{elif} clause
-has a non-zero exit status, then @var{alternate-consequents} is executed.
-The return status is the exit status of the last command executed, or
-zero if no condition tested true.
-
-@item case
-@rwindex case
-@rwindex in
-@rwindex esac
-The syntax of the @code{case} command is:
-
-@example
-@code{case @var{word} in [ [(] @var{pattern} [| @var{pattern}]@dots{}) @var{command-list} ;;]@dots{} esac}
-@end example
-
-@code{case} will selectively execute the @var{command-list} corresponding to
-the first @var{pattern} that matches @var{word}.
-If the shell option @code{nocasematch}
-(see the description of @code{shopt} in @ref{The Shopt Builtin})
-is enabled, the match is performed without regard to the case
-of alphabetic characters.
-The @samp{|} is used to separate multiple patterns, and the @samp{)}
-operator terminates a pattern list.
-A list of patterns and an associated command-list is known
-as a @var{clause}.
-
-Each clause must be terminated with @samp{;;}, @samp{;&}, or @samp{;;&}.
-The @var{word} undergoes tilde expansion, parameter expansion, command
-substitution, arithmetic expansion, and quote removal before matching is
-attempted. Each @var{pattern} undergoes tilde expansion, parameter
-expansion, command substitution, and arithmetic expansion.
-
-There may be an arbitrary number of @code{case} clauses, each terminated
-by a @samp{;;}, @samp{;&}, or @samp{;;&}.
-The first pattern that matches determines the
-command-list that is executed.
-
-Here is an example using @code{case} in a script that could be used to
-describe one interesting feature of an animal:
-
-@example
-echo -n "Enter the name of an animal: "
-read ANIMAL
-echo -n "The $ANIMAL has "
-case $ANIMAL in
- horse | dog | cat) echo -n "four";;
- man | kangaroo ) echo -n "two";;
- *) echo -n "an unknown number of";;
-esac
-echo " legs."
-@end example
-
-@noindent
-
-If the @samp{;;} operator is used, no subsequent matches are attempted after
-the first pattern match.
-Using @samp{;&} in place of @samp{;;} causes execution to continue with
-the @var{command-list} associated with the next clause, if any.
-Using @samp{;;&} in place of @samp{;;} causes the shell to test the patterns
-in the next clause, if any, and execute any associated @var{command-list}
-on a successful match.
-
-The return status is zero if no @var{pattern} is matched. Otherwise, the
-return status is the exit status of the @var{command-list} executed.
-
-@item select
-@rwindex select
-
-The @code{select} construct allows the easy generation of menus.
-It has almost the same syntax as the @code{for} command:
-
-@example
-select @var{name} [in @var{words} @dots{}]; do @var{commands}; done
-@end example
-
-The list of words following @code{in} is expanded, generating a list
-of items. The set of expanded words is printed on the standard
-error output stream, each preceded by a number. If the
-@samp{in @var{words}} is omitted, the positional parameters are printed,
-as if @samp{in "$@@"} had been specified.
-The @env{PS3} prompt is then displayed and a line is read from the
-standard input.
-If the line consists of a number corresponding to one of the displayed
-words, then the value of @var{name} is set to that word.
-If the line is empty, the words and prompt are displayed again.
-If @code{EOF} is read, the @code{select} command completes.
-Any other value read causes @var{name} to be set to null.
-The line read is saved in the variable @env{REPLY}.
-
-The @var{commands} are executed after each selection until a
-@code{break} command is executed, at which
-point the @code{select} command completes.
-
-Here is an example that allows the user to pick a filename from the
-current directory, and displays the name and index of the file
-selected.
-
-@example
-select fname in *;
-do
- echo you picked $fname \($REPLY\)
- break;
-done
-@end example
-
-@item ((@dots{}))
-@example
-(( @var{expression} ))
-@end example
-
-The arithmetic @var{expression} is evaluated according to the rules
-described below (@pxref{Shell Arithmetic}).
-If the value of the expression is non-zero, the return status is 0;
-otherwise the return status is 1. This is exactly equivalent to
-@example
-let "@var{expression}"
-@end example
-@noindent
-@xref{Bash Builtins}, for a full description of the @code{let} builtin.
-
-@item [[@dots{}]]
-@rwindex [[
-@rwindex ]]
-@example
-[[ @var{expression} ]]
-@end example
-
-Return a status of 0 or 1 depending on the evaluation of
-the conditional expression @var{expression}.
-Expressions are composed of the primaries described below in
-@ref{Bash Conditional Expressions}.
-Word splitting and filename expansion are not performed on the words
-between the @samp{[[} and @samp{]]}; tilde expansion, parameter and
-variable expansion, arithmetic expansion, command substitution, process
-substitution, and quote removal are performed.
-Conditional operators such as @samp{-f} must be unquoted to be recognized
-as primaries.
-
-When used with @samp{[[}, the @samp{<} and @samp{>} operators sort
-lexicographically using the current locale.
-
-When the @samp{==} and @samp{!=} operators are used, the string to the
-right of the operator is considered a pattern and matched according
-to the rules described below in @ref{Pattern Matching}.
-If the shell option @code{nocasematch}
-(see the description of @code{shopt} in @ref{The Shopt Builtin})
-is enabled, the match is performed without regard to the case
-of alphabetic characters.
-The return value is 0 if the string matches (@samp{==}) or does not
-match (@samp{!=})the pattern, and 1 otherwise.
-Any part of the pattern may be quoted to force the quoted portion
-to be matched as a string.
-
-An additional binary operator, @samp{=~}, is available, with the same
-precedence as @samp{==} and @samp{!=}.
-When it is used, the string to the right of the operator is considered
-an extended regular expression and matched accordingly (as in @i{regex}3)).
-The return value is 0 if the string matches
-the pattern, and 1 otherwise.
-If the regular expression is syntactically incorrect, the conditional
-expression's return value is 2.
-If the shell option @code{nocasematch}
-(see the description of @code{shopt} in @ref{The Shopt Builtin})
-is enabled, the match is performed without regard to the case
-of alphabetic characters.
-Any part of the pattern may be quoted to force the quoted portion
-to be matched as a string.
-Substrings matched by parenthesized subexpressions within the regular
-expression are saved in the array variable @code{BASH_REMATCH}.
-The element of @code{BASH_REMATCH} with index 0 is the portion of the string
-matching the entire regular expression.
-The element of @code{BASH_REMATCH} with index @var{n} is the portion of the
-string matching the @var{n}th parenthesized subexpression.
-
-Expressions may be combined using the following operators, listed
-in decreasing order of precedence:
-
-@table @code
-@item ( @var{expression} )
-Returns the value of @var{expression}.
-This may be used to override the normal precedence of operators.
-
-@item ! @var{expression}
-True if @var{expression} is false.
-
-@item @var{expression1} && @var{expression2}
-True if both @var{expression1} and @var{expression2} are true.
-
-@item @var{expression1} || @var{expression2}
-True if either @var{expression1} or @var{expression2} is true.
-@end table
-@noindent
-The @code{&&} and @code{||} operators do not evaluate @var{expression2} if the
-value of @var{expression1} is sufficient to determine the return
-value of the entire conditional expression.
-
-@end table
-
-@node Command Grouping
-@subsubsection Grouping Commands
-@cindex commands, grouping
-
-Bash provides two ways to group a list of commands to be executed
-as a unit. When commands are grouped, redirections may be applied
-to the entire command list. For example, the output of all the
-commands in the list may be redirected to a single stream.
-
-@table @code
-@item ()
-@example
-( @var{list} )
-@end example
-
-Placing a list of commands between parentheses causes a subshell
-environment to be created (@pxref{Command Execution Environment}), and each
-of the commands in @var{list} to be executed in that subshell. Since the
-@var{list} is executed in a subshell, variable assignments do not remain in
-effect after the subshell completes.
-
-@item @{@}
-@rwindex @{
-@rwindex @}
-@example
-@{ @var{list}; @}
-@end example
-
-Placing a list of commands between curly braces causes the list to
-be executed in the current shell context. No subshell is created.
-The semicolon (or newline) following @var{list} is required.
-@end table
-
-In addition to the creation of a subshell, there is a subtle difference
-between these two constructs due to historical reasons. The braces
-are @code{reserved words}, so they must be separated from the @var{list}
-by @code{blank}s or other shell metacharacters.
-The parentheses are @code{operators}, and are
-recognized as separate tokens by the shell even if they are not separated
-from the @var{list} by whitespace.
-
-The exit status of both of these constructs is the exit status of
-@var{list}.
-
-@node Coprocesses
-@subsection Coprocesses
-@cindex coprocess
-
-A @code{coprocess} is a shell command preceded by the @code{coproc}
-reserved word.
-A coprocess is executed asynchronously in a subshell, as if the command
-had been terminated with the @samp{&} control operator, with a two-way pipe
-established between the executing shell and the coprocess.
-
-The format for a coprocess is:
-@example
-@code{coproc} [@var{NAME}] @var{command} [@var{redirections}]
-@end example
-
-@noindent
-This creates a coprocess named @var{NAME}.
-If @var{NAME} is not supplied, the default name is @var{COPROC}.
-@var{NAME} must not be supplied if @var{command} is a simple
-command (@pxref{Simple Commands}); otherwise, it is interpreted as
-the first word of the simple command.
-
-When the coproc is executed, the shell creates an array variable
-(@pxref{Arrays})
-named @var{NAME} in the context of the executing shell.
-The standard output of @var{command}
-is connected via a pipe to a file descriptor in the executing shell,
-and that file descriptor is assigned to @var{NAME}[0].
-The standard input of @var{command}
-is connected via a pipe to a file descriptor in the executing shell,
-and that file descriptor is assigned to @var{NAME}[1].
-This pipe is established before any redirections specified by the
-command (@pxref{Redirections}).
-The file descriptors can be utilized as arguments to shell commands
-and redirections using standard word expansions.
-
-The process ID of the shell spawned to execute the coprocess is
-available as the value of the variable @var{NAME}_PID.
-The @code{wait}
-builtin command may be used to wait for the coprocess to terminate.
-
-The return status of a coprocess is the exit status of @var{command}.
-
-@node GNU Parallel
-@subsection GNU Parallel
-
-GNU Parallel, as its name suggests, can be used to build and run commands
-in parallel. You may run the same command with different arguments, whether
-they are filenames, usernames, hostnames, or lines read from files.
-
-For a complete description, refer to the GNU Parallel documentation. A few
-examples should provide a brief introduction to its use.
-
-For example, it is easy to prefix each line in a text file with a specified
-string:
-@example
-cat file | parallel -k echo prefix_string
-@end example
-@noindent
-The @option{-k} option is required to preserve the lines' order.
-
-Similarly, you can append a specified string to each line in a text file:
-@example
-cat file | parallel -k echo @{@} append_string
-@end example
-
-You can use Parallel to move files from the current directory when the
-number of files is too large to process with one @code{mv} invocation:
-@example
-ls | parallel mv @{@} destdir
-@end example
-
-As you can see, the @{@} is replaced with each line read from standard input.
-This will run as many @code{mv} commands as there are files in the current
-directory. You can emulate a parallel @code{xargs} by adding the @option{-X}
-option:
-@example
-ls | parallel -X mv @{@} destdir
-@end example
-
-GNU Parallel can replace certain common idioms that operate on lines read
-from a file (in this case, filenames):
-@example
- for x in $(cat list); do
- do-something1 $x config-$x
- do-something2 < $x
- done | process-output
-@end example
-
-@noindent
-with a more compact syntax reminiscent of lambdas:
-@example
-cat list | parallel "do-something1 @{@} config-@{@} ; do-something2 < @{@}" | process-output
-@end example
-
-Parallel provides a built-in mechanism to remove filename extensions, which
-lends itself to batch file transformations or renaming:
-@example
-ls *.gz | parallel -j+0 "zcat @{@} | bzip2 >@{.@}.bz2 && rm @{@}"
-@end example
-@noindent
-This will recompress all files in the current directory with names ending
-in .gz using bzip2, running one job per CPU (-j+0) in parallel.
-
-If a command generates output, you may want to preserve the input order in
-the output. For instance, the following command
-@example
-@{ echo foss.org.my ; echo debian.org; echo freenetproject.org; @} | parallel traceroute
-@end example
-@noindent
-will display as output the traceroute invocation that finishes first. Using
-the @option{-k} option, as we saw above
-@example
-@{ echo foss.org.my ; echo debian.org; echo freenetproject.org; @} | parallel -k traceroute
-@end example
-@noindent
-will ensure that the output of @code{traceroute foss.org.my} is displayed first.
-
-@node Shell Functions
-@section Shell Functions
-@cindex shell function
-@cindex functions, shell
-
-Shell functions are a way to group commands for later execution
-using a single name for the group. They are executed just like
-a "regular" command.
-When the name of a shell function is used as a simple command name,
-the list of commands associated with that function name is executed.
-Shell functions are executed in the current
-shell context; no new process is created to interpret them.
-
-Functions are declared using this syntax:
-@rwindex function
-@example
-@var{name} () @var{compound-command} [ @var{redirections} ]@*or@*
-@code{function} @var{name} [()] @var{compound-command} [ @var{redirections} ]
-@end example
-
-This defines a shell function named @var{name}. The reserved
-word @code{function} is optional.
-If the @code{function} reserved
-word is supplied, the parentheses are optional.
-The @var{body} of the function is the compound command
-@var{compound-command} (@pxref{Compound Commands}).
-That command is usually a @var{list} enclosed between @{ and @}, but
-may be any compound command listed above.
-@var{compound-command} is executed whenever @var{name} is specified as the
-name of a command.
-Any redirections (@pxref{Redirections}) associated with the shell function
-are performed when the function is executed.
-
-A function definition may be deleted using the @option{-f} option to the
-@code{unset} builtin (@pxref{Bourne Shell Builtins}).
-
-The exit status of a function definition is zero unless a syntax error
-occurs or a readonly function with the same name already exists.
-When executed, the exit status of a function is the exit status of the
-last command executed in the body.
-
-Note that for historical reasons, in the most common usage the curly braces
-that surround the body of the function must be separated from the body by
-@code{blank}s or newlines.
-This is because the braces are reserved words and are only recognized
-as such when they are separated from the command list
-by whitespace or another shell metacharacter.
-Also, when using the braces, the @var{list} must be terminated by a semicolon,
-a @samp{&}, or a newline.
-
-When a function is executed, the arguments to the
-function become the positional parameters
-during its execution (@pxref{Positional Parameters}).
-The special parameter @samp{#} that expands to the number of
-positional parameters is updated to reflect the change.
-Special parameter @code{0} is unchanged.
-The first element of the @env{FUNCNAME} variable is set to the
-name of the function while the function is executing.
-
-All other aspects of the shell execution
-environment are identical between a function and its caller
-with these exceptions:
-the @env{DEBUG} and @env{RETURN} traps
-are not inherited unless the function has been given the
-@code{trace} attribute using the @code{declare} builtin or
-the @code{-o functrace} option has been enabled with
-the @code{set} builtin,
-(in which case all functions inherit the @env{DEBUG} and @env{RETURN} traps),
-and the @env{ERR} trap is not inherited unless the @code{-o errtrace}
-shell option has been enabled.
-@xref{Bourne Shell Builtins}, for the description of the
-@code{trap} builtin.
-
-The @env{FUNCNEST} variable, if set to a numeric value greater
-than 0, defines a maximum function nesting level. Function
-invocations that exceed the limit cause the entire command to
-abort.
-
-If the builtin command @code{return}
-is executed in a function, the function completes and
-execution resumes with the next command after the function
-call.
-Any command associated with the @code{RETURN} trap is executed
-before execution resumes.
-When a function completes, the values of the
-positional parameters and the special parameter @samp{#}
-are restored to the values they had prior to the function's
-execution. If a numeric argument is given to @code{return},
-that is the function's return status; otherwise the function's
-return status is the exit status of the last command executed
-before the @code{return}.
-
-Variables local to the function may be declared with the
-@code{local} builtin. These variables are visible only to
-the function and the commands it invokes.
-
-Function names and definitions may be listed with the
-@option{-f} option to the @code{declare} or @code{typeset}
-builtin commands (@pxref{Bash Builtins}).
-The @option{-F} option to @code{declare} or @code{typeset}
-will list the function names only
-(and optionally the source file and line number, if the @code{extdebug}
-shell option is enabled).
-Functions may be exported so that subshells
-automatically have them defined with the
-@option{-f} option to the @code{export} builtin
-(@pxref{Bourne Shell Builtins}).
-Note that shell functions and variables with the same name may result
-in multiple identically-named entries in the environment passed to the
-shell's children.
-Care should be taken in cases where this may cause a problem.
-
-Functions may be recursive.
-The @code{FUNCNEST} variable may be used to limit the depth of the
-function call stack and restrict the number of function invocations.
-By default, no limit is placed on the number of recursive calls.
-
-@node Shell Parameters
-@section Shell Parameters
-@cindex parameters
-@cindex variable, shell
-@cindex shell variable
-
-@menu
-* Positional Parameters:: The shell's command-line arguments.
-* Special Parameters:: Parameters denoted by special characters.
-@end menu
-
-A @var{parameter} is an entity that stores values.
-It can be a @code{name}, a number, or one of the special characters
-listed below.
-A @var{variable} is a parameter denoted by a @code{name}.
-A variable has a @var{value} and zero or more @var{attributes}.
-Attributes are assigned using the @code{declare} builtin command
-(see the description of the @code{declare} builtin in @ref{Bash Builtins}).
-
-A parameter is set if it has been assigned a value. The null string is
-a valid value. Once a variable is set, it may be unset only by using
-the @code{unset} builtin command.
-
-A variable may be assigned to by a statement of the form
-@example
-@var{name}=[@var{value}]
-@end example
-@noindent
-If @var{value}
-is not given, the variable is assigned the null string. All
-@var{value}s undergo tilde expansion, parameter and variable expansion,
-command substitution, arithmetic expansion, and quote
-removal (detailed below). If the variable has its @code{integer}
-attribute set, then @var{value}
-is evaluated as an arithmetic expression even if the @code{$((@dots{}))}
-expansion is not used (@pxref{Arithmetic Expansion}).
-Word splitting is not performed, with the exception
-of @code{"$@@"} as explained below.
-Filename expansion is not performed.
-Assignment statements may also appear as arguments to the
-@code{alias},
-@code{declare}, @code{typeset}, @code{export}, @code{readonly},
-and @code{local} builtin commands.
-
-In the context where an assignment statement is assigning a value
-to a shell variable or array index (@pxref{Arrays}), the @samp{+=}
-operator can be used to
-append to or add to the variable's previous value.
-When @samp{+=} is applied to a variable for which the @var{integer} attribute
-has been set, @var{value} is evaluated as an arithmetic expression and
-added to the variable's current value, which is also evaluated.
-When @samp{+=} is applied to an array variable using compound assignment
-(@pxref{Arrays}), the
-variable's value is not unset (as it is when using @samp{=}), and new
-values are appended to the array beginning at one greater than the array's
-maximum index (for indexed arrays), or added as additional key-value pairs
-in an associative array.
-When applied to a string-valued variable, @var{value} is expanded and
-appended to the variable's value.
-
-@node Positional Parameters
-@subsection Positional Parameters
-@cindex parameters, positional
-
-A @var{positional parameter} is a parameter denoted by one or more
-digits, other than the single digit @code{0}. Positional parameters are
-assigned from the shell's arguments when it is invoked,
-and may be reassigned using the @code{set} builtin command.
-Positional parameter @code{N} may be referenced as @code{$@{N@}}, or
-as @code{$N} when @code{N} consists of a single digit.
-Positional parameters may not be assigned to with assignment statements.
-The @code{set} and @code{shift} builtins are used to set and
-unset them (@pxref{Shell Builtin Commands}).
-The positional parameters are
-temporarily replaced when a shell function is executed
-(@pxref{Shell Functions}).
-
-When a positional parameter consisting of more than a single
-digit is expanded, it must be enclosed in braces.
-
-@node Special Parameters
-@subsection Special Parameters
-@cindex parameters, special
-
-The shell treats several parameters specially. These parameters may
-only be referenced; assignment to them is not allowed.
-
-@vtable @code
-
-@item *
-Expands to the positional parameters, starting from one. When the
-expansion occurs within double quotes, it expands to a single word
-with the value of each parameter separated by the first character
-of the @env{IFS}
-special variable. That is, @code{"$*"} is equivalent
-to @code{"$1@var{c}$2@var{c}@dots{}"}, where @var{c}
-is the first character of the value of the @code{IFS}
-variable.
-If @env{IFS} is unset, the parameters are separated by spaces.
-If @env{IFS} is null, the parameters are joined without intervening
-separators.
-
-
-@item @@
-Expands to the positional parameters, starting from one. When the
-expansion occurs within double quotes, each parameter expands to a
-separate word. That is, @code{"$@@"} is equivalent to
-@code{"$1" "$2" @dots{}}.
-If the double-quoted expansion occurs within a word, the expansion of
-the first parameter is joined with the beginning part of the original
-word, and the expansion of the last parameter is joined with the last
-part of the original word.
-When there are no positional parameters, @code{"$@@"} and
-@code{$@@}
-expand to nothing (i.e., they are removed).
-
-@item #
-Expands to the number of positional parameters in decimal.
-
-@item ?
-Expands to the exit status of the most recently executed foreground
-pipeline.
-
-@item -
-(A hyphen.) Expands to the current option flags as specified upon
-invocation, by the @code{set}
-builtin command, or those set by the shell itself
-(such as the @option{-i} option).
-
-@item $
-Expands to the process @sc{id} of the shell. In a @code{()} subshell, it
-expands to the process @sc{id} of the invoking shell, not the subshell.
-
-@item !
-Expands to the process @sc{id} of the most recently executed background
-(asynchronous) command.
-
-@item 0
-Expands to the name of the shell or shell script. This is set at
-shell initialization. If Bash is invoked with a file of commands
-(@pxref{Shell Scripts}), @code{$0} is set to the name of that file.
-If Bash is started with the @option{-c} option (@pxref{Invoking Bash}),
-then @code{$0} is set to the first argument after the string to be
-executed, if one is present. Otherwise, it is set
-to the filename used to invoke Bash, as given by argument zero.
-
-@item _
-(An underscore.)
-At shell startup, set to the absolute pathname used to invoke the
-shell or shell script being executed as passed in the environment
-or argument list.
-Subsequently, expands to the last argument to the previous command,
-after expansion.
-Also set to the full pathname used to invoke each command executed
-and placed in the environment exported to that command.
-When checking mail, this parameter holds the name of the mail file.
-@end vtable
-
-@node Shell Expansions
-@section Shell Expansions
-@cindex expansion
-
-Expansion is performed on the command line after it has been split into
-@code{token}s. There are seven kinds of expansion performed:
-@itemize @bullet
-@item brace expansion
-@item tilde expansion
-@item parameter and variable expansion
-@item command substitution
-@item arithmetic expansion
-@item word splitting
-@item filename expansion
-@end itemize
-
-@menu
-* Brace Expansion:: Expansion of expressions within braces.
-* Tilde Expansion:: Expansion of the ~ character.
-* Shell Parameter Expansion:: How Bash expands variables to their values.
-* Command Substitution:: Using the output of a command as an argument.
-* Arithmetic Expansion:: How to use arithmetic in shell expansions.
-* Process Substitution:: A way to write and read to and from a
- command.
-* Word Splitting:: How the results of expansion are split into separate
- arguments.
-* Filename Expansion:: A shorthand for specifying filenames matching patterns.
-* Quote Removal:: How and when quote characters are removed from
- words.
-@end menu
-
-The order of expansions is: brace expansion, tilde expansion,
-parameter, variable, and arithmetic expansion and
-command substitution
-(done in a left-to-right fashion), word splitting, and filename
-expansion.
-
-On systems that can support it, there is an additional expansion
-available: @var{process substitution}. This is performed at the
-same time as parameter, variable, and arithmetic expansion and
-command substitution.
-
-Only brace expansion, word splitting, and filename expansion
-can change the number of words of the expansion; other expansions
-expand a single word to a single word.
-The only exceptions to this are the expansions of
-@code{"$@@"} (@pxref{Special Parameters}) and @code{"$@{@var{name}[@@]@}"}
-(@pxref{Arrays}).
-
-After all expansions, @code{quote removal} (@pxref{Quote Removal})
-is performed.
-
-@node Brace Expansion
-@subsection Brace Expansion
-@cindex brace expansion
-@cindex expansion, brace
-
-Brace expansion is a mechanism by which arbitrary strings may be generated.
-This mechanism is similar to
-@var{filename expansion} (@pxref{Filename Expansion}),
-but the file names generated need not exist.
-Patterns to be brace expanded take the form of an optional @var{preamble},
-followed by either a series of comma-separated strings or a sequence expression
-between a pair of braces,
-followed by an optional @var{postscript}.
-The preamble is prefixed to each string contained within the braces, and
-the postscript is then appended to each resulting string, expanding left
-to right.
-
-Brace expansions may be nested.
-The results of each expanded string are not sorted; left to right order
-is preserved.
-For example,
-@example
-bash$ echo a@{d,c,b@}e
-ade ace abe
-@end example
-
-A sequence expression takes the form @code{@{@var{x}..@var{y}[..@var{incr}]@}},
-where @var{x} and @var{y} are either integers or single characters,
-and @var{incr}, an optional increment, is an integer.
-When integers are supplied, the expression expands to each number between
-@var{x} and @var{y}, inclusive.
-Supplied integers may be prefixed with @samp{0} to force each term to have the
-same width. When either @var{x} or @var{y} begins with a zero, the shell
-attempts to force all generated terms to contain the same number of digits,
-zero-padding where necessary.
-When characters are supplied, the expression expands to each character
-lexicographically between @var{x} and @var{y}, inclusive. Note that
-both @var{x} and @var{y} must be of the same type.
-When the increment is supplied, it is used as the difference between
-each term. The default increment is 1 or -1 as appropriate.
-
-Brace expansion is performed before any other expansions,
-and any characters special to other expansions are preserved
-in the result. It is strictly textual. Bash
-does not apply any syntactic interpretation to the context of the
-expansion or the text between the braces.
-To avoid conflicts with parameter expansion, the string @samp{$@{}
-is not considered eligible for brace expansion.
-
-A correctly-formed brace expansion must contain unquoted opening
-and closing braces, and at least one unquoted comma or a valid
-sequence expression.
-Any incorrectly formed brace expansion is left unchanged.
-
-A @{ or @samp{,} may be quoted with a backslash to prevent its
-being considered part of a brace expression.
-To avoid conflicts with parameter expansion, the string @samp{$@{}
-is not considered eligible for brace expansion.
-
-This construct is typically used as shorthand when the common
-prefix of the strings to be generated is longer than in the
-above example:
-@example
-mkdir /usr/local/src/bash/@{old,new,dist,bugs@}
-@end example
-or
-@example
-chown root /usr/@{ucb/@{ex,edit@},lib/@{ex?.?*,how_ex@}@}
-@end example
-
-@node Tilde Expansion
-@subsection Tilde Expansion
-@cindex tilde expansion
-@cindex expansion, tilde
-
-If a word begins with an unquoted tilde character (@samp{~}), all of the
-characters up to the first unquoted slash (or all characters,
-if there is no unquoted slash) are considered a @var{tilde-prefix}.
-If none of the characters in the tilde-prefix are quoted, the
-characters in the tilde-prefix following the tilde are treated as a
-possible @var{login name}.
-If this login name is the null string, the tilde is replaced with the
-value of the @env{HOME} shell variable.
-If @env{HOME} is unset, the home directory of the user executing the
-shell is substituted instead.
-Otherwise, the tilde-prefix is replaced with the home directory
-associated with the specified login name.
-
-If the tilde-prefix is @samp{~+}, the value of
-the shell variable @env{PWD} replaces the tilde-prefix.
-If the tilde-prefix is @samp{~-}, the value of the shell variable
-@env{OLDPWD}, if it is set, is substituted.
-
-If the characters following the tilde in the tilde-prefix consist of a
-number @var{N}, optionally prefixed by a @samp{+} or a @samp{-},
-the tilde-prefix is replaced with the
-corresponding element from the directory stack, as it would be displayed
-by the @code{dirs} builtin invoked with the characters following tilde
-in the tilde-prefix as an argument (@pxref{The Directory Stack}).
-If the tilde-prefix, sans the tilde, consists of a number without a
-leading @samp{+} or @samp{-}, @samp{+} is assumed.
-
-If the login name is invalid, or the tilde expansion fails, the word is
-left unchanged.
-
-Each variable assignment is checked for unquoted tilde-prefixes immediately
-following a @samp{:} or the first @samp{=}.
-In these cases, tilde expansion is also performed.
-Consequently, one may use file names with tildes in assignments to
-@env{PATH}, @env{MAILPATH}, and @env{CDPATH},
-and the shell assigns the expanded value.
-
-The following table shows how Bash treats unquoted tilde-prefixes:
-
-@table @code
-@item ~
-The value of @code{$HOME}
-@item ~/foo
-@file{$HOME/foo}
-
-@item ~fred/foo
-The subdirectory @code{foo} of the home directory of the user
-@code{fred}
-
-@item ~+/foo
-@file{$PWD/foo}
-
-@item ~-/foo
-@file{$@{OLDPWD-'~-'@}/foo}
-
-@item ~@var{N}
-The string that would be displayed by @samp{dirs +@var{N}}
-
-@item ~+@var{N}
-The string that would be displayed by @samp{dirs +@var{N}}
-
-@item ~-@var{N}
-The string that would be displayed by @samp{dirs -@var{N}}
-
-@end table
-
-@node Shell Parameter Expansion
-@subsection Shell Parameter Expansion
-@cindex parameter expansion
-@cindex expansion, parameter
-
-The @samp{$} character introduces parameter expansion,
-command substitution, or arithmetic expansion. The parameter name
-or symbol to be expanded may be enclosed in braces, which
-are optional but serve to protect the variable to be expanded from
-characters immediately following it which could be
-interpreted as part of the name.
-
-When braces are used, the matching ending brace is the first @samp{@}}
-not escaped by a backslash or within a quoted string, and not within an
-embedded arithmetic expansion, command substitution, or parameter
-expansion.
-
-The basic form of parameter expansion is $@{@var{parameter}@}.
-The value of @var{parameter} is substituted. The braces are required
-when @var{parameter}
-is a positional parameter with more than one digit,
-or when @var{parameter}
-is followed by a character that is not to be
-interpreted as part of its name.
-
-If the first character of @var{parameter} is an exclamation point (!),
-a level of variable indirection is introduced.
-Bash uses the value of the variable formed from the rest of
-@var{parameter} as the name of the variable; this variable is then
-expanded and that value is used in the rest of the substitution, rather
-than the value of @var{parameter} itself.
-This is known as @code{indirect expansion}.
-The exceptions to this are the expansions of $@{!@var{prefix}@*@}
-and $@{!@var{name}[@@]@}
-described below.
-The exclamation point must immediately follow the left brace in order to
-introduce indirection.
-
-In each of the cases below, @var{word} is subject to tilde expansion,
-parameter expansion, command substitution, and arithmetic expansion.
-
-When not performing substring expansion, using the form described
-below, Bash tests for a parameter that is unset or null.
-Omitting the colon results in a test only for a parameter that is unset.
-Put another way, if the colon is included,
-the operator tests for both @var{parameter}'s existence and that its value
-is not null; if the colon is omitted, the operator tests only for existence.
-
-@table @code
-
-@item $@{@var{parameter}:@minus{}@var{word}@}
-If @var{parameter} is unset or null, the expansion of
-@var{word} is substituted. Otherwise, the value of
-@var{parameter} is substituted.
-
-@item $@{@var{parameter}:=@var{word}@}
-If @var{parameter}
-is unset or null, the expansion of @var{word}
-is assigned to @var{parameter}.
-The value of @var{parameter} is then substituted.
-Positional parameters and special parameters may not be assigned to
-in this way.
-
-@item $@{@var{parameter}:?@var{word}@}
-If @var{parameter}
-is null or unset, the expansion of @var{word} (or a message
-to that effect if @var{word}
-is not present) is written to the standard error and the shell, if it
-is not interactive, exits. Otherwise, the value of @var{parameter} is
-substituted.
-
-@item $@{@var{parameter}:+@var{word}@}
-If @var{parameter}
-is null or unset, nothing is substituted, otherwise the expansion of
-@var{word} is substituted.
-
-@item $@{@var{parameter}:@var{offset}@}
-@itemx $@{@var{parameter}:@var{offset}:@var{length}@}
-Expands to up to @var{length} characters of @var{parameter}
-starting at the character specified by @var{offset}.
-If @var{length} is omitted, expands to the substring of
-@var{parameter} starting at the character specified by @var{offset}.
-@var{length} and @var{offset} are arithmetic expressions
-(@pxref{Shell Arithmetic}).
-This is referred to as Substring Expansion.
-
-If @var{offset} evaluates to a number less than zero, the value
-is used as an offset from the end of the value of @var{parameter}.
-If @var{length} evaluates to a number less than zero, and @var{parameter}
-is not @samp{@@} and not an indexed or associative array, it is interpreted
-as an offset from the end of the value of @var{parameter} rather than
-a number of characters, and the expansion is the characters between the
-two offsets.
-If @var{parameter} is @samp{@@}, the result is @var{length} positional
-parameters beginning at @var{offset}.
-If @var{parameter} is an indexed array name subscripted
-by @samp{@@} or @samp{*}, the result is the @var{length}
-members of the array beginning with @code{$@{@var{parameter}[@var{offset}]@}}.
-A negative @var{offset} is taken relative to one greater than the maximum
-index of the specified array.
-Substring expansion applied to an associative array produces undefined
-results.
-
-Note that a negative offset must be separated from the colon by at least
-one space to avoid being confused with the @samp{:-} expansion.
-Substring indexing is zero-based unless the positional parameters
-are used, in which case the indexing starts at 1 by default.
-If @var{offset} is 0, and the positional parameters are used, @code{$@@} is
-prefixed to the list.
-
-@item $@{!@var{prefix}*@}
-@itemx $@{!@var{prefix}@@@}
-Expands to the names of variables whose names begin with @var{prefix},
-separated by the first character of the @env{IFS} special variable.
-When @samp{@@} is used and the expansion appears within double quotes, each
-variable name expands to a separate word.
-
-@item $@{!@var{name}[@@]@}
-@itemx $@{!@var{name}[*]@}
-If @var{name} is an array variable, expands to the list of array indices
-(keys) assigned in @var{name}.
-If @var{name} is not an array, expands to 0 if @var{name} is set and null
-otherwise.
-When @samp{@@} is used and the expansion appears within double quotes, each
-key expands to a separate word.
-
-@item $@{#@var{parameter}@}
-The length in characters of the expanded value of @var{parameter} is
-substituted.
-If @var{parameter} is @samp{*} or @samp{@@}, the value substituted
-is the number of positional parameters.
-If @var{parameter} is an array name subscripted by @samp{*} or @samp{@@},
-the value substituted is the number of elements in the array.
-
-@item $@{@var{parameter}#@var{word}@}
-@itemx $@{@var{parameter}##@var{word}@}
-The @var{word}
-is expanded to produce a pattern just as in filename
-expansion (@pxref{Filename Expansion}). If the pattern matches
-the beginning of the expanded value of @var{parameter},
-then the result of the expansion is the expanded value of @var{parameter}
-with the shortest matching pattern (the @samp{#} case) or the
-longest matching pattern (the @samp{##} case) deleted.
-If @var{parameter} is @samp{@@} or @samp{*},
-the pattern removal operation is applied to each positional
-parameter in turn, and the expansion is the resultant list.
-If @var{parameter} is an array variable subscripted with
-@samp{@@} or @samp{*},
-the pattern removal operation is applied to each member of the
-array in turn, and the expansion is the resultant list.
-
-@item $@{@var{parameter}%@var{word}@}
-@itemx $@{@var{parameter}%%@var{word}@}
-The @var{word} is expanded to produce a pattern just as in
-filename expansion.
-If the pattern matches a trailing portion of the expanded value of
-@var{parameter}, then the result of the expansion is the value of
-@var{parameter} with the shortest matching pattern (the @samp{%} case)
-or the longest matching pattern (the @samp{%%} case) deleted.
-If @var{parameter} is @samp{@@} or @samp{*},
-the pattern removal operation is applied to each positional
-parameter in turn, and the expansion is the resultant list.
-If @var{parameter}
-is an array variable subscripted with @samp{@@} or @samp{*},
-the pattern removal operation is applied to each member of the
-array in turn, and the expansion is the resultant list.
-
-@item $@{@var{parameter}/@var{pattern}/@var{string}@}
-
-The @var{pattern} is expanded to produce a pattern just as in
-filename expansion.
-@var{Parameter} is expanded and the longest match of @var{pattern}
-against its value is replaced with @var{string}.
-If @var{pattern} begins with @samp{/}, all matches of @var{pattern} are
-replaced with @var{string}. Normally only the first match is replaced.
-If @var{pattern} begins with @samp{#}, it must match at the beginning
-of the expanded value of @var{parameter}.
-If @var{pattern} begins with @samp{%}, it must match at the end
-of the expanded value of @var{parameter}.
-If @var{string} is null, matches of @var{pattern} are deleted
-and the @code{/} following @var{pattern} may be omitted.
-If @var{parameter} is @samp{@@} or @samp{*},
-the substitution operation is applied to each positional
-parameter in turn, and the expansion is the resultant list.
-If @var{parameter}
-is an array variable subscripted with @samp{@@} or @samp{*},
-the substitution operation is applied to each member of the
-array in turn, and the expansion is the resultant list.
-
-@item $@{@var{parameter}^@var{pattern}@}
-@itemx $@{@var{parameter}^^@var{pattern}@}
-@itemx $@{@var{parameter},@var{pattern}@}
-@itemx $@{@var{parameter},,@var{pattern}@}
-This expansion modifies the case of alphabetic characters in @var{parameter}.
-The @var{pattern} is expanded to produce a pattern just as in
-filename expansion.
-The @samp{^} operator converts lowercase letters matching @var{pattern}
-to uppercase; the @samp{,} operator converts matching uppercase letters
-to lowercase.
-The @samp{^^} and @samp{,,} expansions convert each matched character in the
-expanded value; the @samp{^} and @samp{,} expansions match and convert only
-the first character in the expanded value.
-If @var{pattern} is omitted, it is treated like a @samp{?}, which matches
-every character.
-If @var{parameter} is @samp{@@} or @samp{*},
-the case modification operation is applied to each positional
-parameter in turn, and the expansion is the resultant list.
-If @var{parameter}
-is an array variable subscripted with @samp{@@} or @samp{*},
-the case modification operation is applied to each member of the
-array in turn, and the expansion is the resultant list.
-
-@end table
-
-@node Command Substitution
-@subsection Command Substitution
-@cindex command substitution
-
-Command substitution allows the output of a command to replace
-the command itself.
-Command substitution occurs when a command is enclosed as follows:
-@example
-$(@var{command})
-@end example
-@noindent
-or
-@example
-`@var{command}`
-@end example
-
-@noindent
-Bash performs the expansion by executing @var{command} and
-replacing the command substitution with the standard output of the
-command, with any trailing newlines deleted.
-Embedded newlines are not deleted, but they may be removed during
-word splitting.
-The command substitution @code{$(cat @var{file})} can be
-replaced by the equivalent but faster @code{$(< @var{file})}.
-
-When the old-style backquote form of substitution is used,
-backslash retains its literal meaning except when followed by
-@samp{$}, @samp{`}, or @samp{\}.
-The first backquote not preceded by a backslash terminates the
-command substitution.
-When using the @code{$(@var{command})} form, all characters between
-the parentheses make up the command; none are treated specially.
-
-Command substitutions may be nested. To nest when using the backquoted
-form, escape the inner backquotes with backslashes.
-
-If the substitution appears within double quotes, word splitting and
-filename expansion are not performed on the results.
-
-@node Arithmetic Expansion
-@subsection Arithmetic Expansion
-@cindex expansion, arithmetic
-@cindex arithmetic expansion
-
-Arithmetic expansion allows the evaluation of an arithmetic expression
-and the substitution of the result. The format for arithmetic expansion is:
-
-@example
-$(( @var{expression} ))
-@end example
-
-The expression is treated as if it were within double quotes, but
-a double quote inside the parentheses is not treated specially.
-All tokens in the expression undergo parameter expansion, command
-substitution, and quote removal.
-Arithmetic expansions may be nested.
-
-The evaluation is performed according to the rules listed below
-(@pxref{Shell Arithmetic}).
-If the expression is invalid, Bash prints a message indicating
-failure to the standard error and no substitution occurs.
-
-@node Process Substitution
-@subsection Process Substitution
-@cindex process substitution
-
-Process substitution is supported on systems that support named
-pipes (@sc{fifo}s) or the @file{/dev/fd} method of naming open files.
-It takes the form of
-@example
-<(@var{list})
-@end example
-@noindent
-or
-@example
->(@var{list})
-@end example
-@noindent
-The process @var{list} is run with its input or output connected to a
-@sc{fifo} or some file in @file{/dev/fd}. The name of this file is
-passed as an argument to the current command as the result of the
-expansion. If the @code{>(@var{list})} form is used, writing to
-the file will provide input for @var{list}. If the
-@code{<(@var{list})} form is used, the file passed as an
-argument should be read to obtain the output of @var{list}.
-Note that no space may appear between the @code{<} or @code{>}
-and the left parenthesis, otherwise the construct would be interpreted
-as a redirection.
-
-When available, process substitution is performed simultaneously with
-parameter and variable expansion, command substitution, and arithmetic
-expansion.
-
-@node Word Splitting
-@subsection Word Splitting
-@cindex word splitting
-
-The shell scans the results of parameter expansion, command substitution,
-and arithmetic expansion that did not occur within double quotes for
-word splitting.
-
-The shell treats each character of @env{$IFS} as a delimiter, and splits
-the results of the other expansions into words on these characters.
-If @env{IFS} is unset, or its value is exactly @code{<space><tab><newline>},
-the default, then sequences of
-@code{ <space>}, @code{<tab>}, and @code{<newline>}
-at the beginning and end of the results of the previous
-expansions are ignored, and any sequence of @env{IFS}
-characters not at the beginning or end serves to delimit words.
-If @env{IFS} has a value other than the default, then sequences of
-the whitespace characters @code{space} and @code{tab}
-are ignored at the beginning and end of the
-word, as long as the whitespace character is in the
-value of @env{IFS} (an @env{IFS} whitespace character).
-Any character in @env{IFS} that is not @env{IFS}
-whitespace, along with any adjacent @env{IFS}
-whitespace characters, delimits a field. A sequence of @env{IFS}
-whitespace characters is also treated as a delimiter.
-If the value of @env{IFS} is null, no word splitting occurs.
-
-Explicit null arguments (@code{""} or @code{''}) are retained.
-Unquoted implicit null arguments, resulting from the expansion of
-parameters that have no values, are removed.
-If a parameter with no value is expanded within double quotes, a
-null argument results and is retained.
-
-Note that if no expansion occurs, no splitting
-is performed.
-
-@node Filename Expansion
-@subsection Filename Expansion
-@menu
-* Pattern Matching:: How the shell matches patterns.
-@end menu
-@cindex expansion, filename
-@cindex expansion, pathname
-@cindex filename expansion
-@cindex pathname expansion
-
-After word splitting, unless the @option{-f} option has been set
-(@pxref{The Set Builtin}), Bash scans each word for the characters
-@samp{*}, @samp{?}, and @samp{[}.
-If one of these characters appears, then the word is
-regarded as a @var{pattern},
-and replaced with an alphabetically sorted list of
-file names matching the pattern (@pxref{Pattern Matching}).
-If no matching file names are found,
-and the shell option @code{nullglob} is disabled, the word is left
-unchanged.
-If the @code{nullglob} option is set, and no matches are found, the word
-is removed.
-If the @code{failglob} shell option is set, and no matches are found,
-an error message is printed and the command is not executed.
-If the shell option @code{nocaseglob} is enabled, the match is performed
-without regard to the case of alphabetic characters.
-
-When a pattern is used for filename expansion, the character @samp{.}
-at the start of a filename or immediately following a slash
-must be matched explicitly, unless the shell option @code{dotglob} is set.
-When matching a file name, the slash character must always be
-matched explicitly.
-In other cases, the @samp{.} character is not treated specially.
-
-See the description of @code{shopt} in @ref{The Shopt Builtin},
-for a description of the @code{nocaseglob}, @code{nullglob},
-@code{failglob}, and @code{dotglob} options.
-
-The @env{GLOBIGNORE}
-shell variable may be used to restrict the set of filenames matching a
-pattern. If @env{GLOBIGNORE}
-is set, each matching filename that also matches one of the patterns in
-@env{GLOBIGNORE} is removed from the list of matches. The filenames
-@file{.} and @file{..}
-are always ignored when @env{GLOBIGNORE}
-is set and not null.
-However, setting @env{GLOBIGNORE} to a non-null value has the effect of
-enabling the @code{dotglob}
-shell option, so all other filenames beginning with a
-@samp{.} will match.
-To get the old behavior of ignoring filenames beginning with a
-@samp{.}, make @samp{.*} one of the patterns in @env{GLOBIGNORE}.
-The @code{dotglob} option is disabled when @env{GLOBIGNORE}
-is unset.
-
-@node Pattern Matching
-@subsubsection Pattern Matching
-@cindex pattern matching
-@cindex matching, pattern
-
-Any character that appears in a pattern, other than the special pattern
-characters described below, matches itself.
-The @sc{nul} character may not occur in a pattern.
-A backslash escapes the following character; the
-escaping backslash is discarded when matching.
-The special pattern characters must be quoted if they are to be matched
-literally.
-
-The special pattern characters have the following meanings:
-@table @code
-@item *
-Matches any string, including the null string.
-When the @code{globstar} shell option is enabled, and @samp{*} is used in
-a filename expansion context, two adjacent @samp{*}s used as a single
-pattern will match all files and zero or more directories and
-subdirectories.
-If followed by a @samp{/}, two adjacent @samp{*}s will match only
-directories and subdirectories.
-@item ?
-Matches any single character.
-@item [@dots{}]
-Matches any one of the enclosed characters. A pair of characters
-separated by a hyphen denotes a @var{range expression};
-any character that sorts between those two characters, inclusive,
-using the current locale's collating sequence and character set,
-is matched. If the first character following the
-@samp{[} is a @samp{!} or a @samp{^}
-then any character not enclosed is matched. A @samp{@minus{}}
-may be matched by including it as the first or last character
-in the set. A @samp{]} may be matched by including it as the first
-character in the set.
-The sorting order of characters in range expressions is determined by
-the current locale and the values of the
-@env{LC_COLLATE} and @env{LC_ALL} shell variables, if set.
-
-For example, in the default C locale, @samp{[a-dx-z]} is equivalent to
-@samp{[abcdxyz]}. Many locales sort characters in dictionary order, and in
-these locales @samp{[a-dx-z]} is typically not equivalent to @samp{[abcdxyz]};
-it might be equivalent to @samp{[aBbCcDdxXyYz]}, for example. To obtain
-the traditional interpretation of ranges in bracket expressions, you can
-force the use of the C locale by setting the @env{LC_COLLATE} or
-@env{LC_ALL} environment variable to the value @samp{C}.
-
-Within @samp{[} and @samp{]}, @var{character classes} can be specified
-using the syntax
-@code{[:}@var{class}@code{:]}, where @var{class} is one of the
-following classes defined in the @sc{posix} standard:
-@example
-alnum alpha ascii blank cntrl digit graph lower
-print punct space upper word xdigit
-@end example
-@noindent
-A character class matches any character belonging to that class.
-The @code{word} character class matches letters, digits, and the character
-@samp{_}.
-
-Within @samp{[} and @samp{]}, an @var{equivalence class} can be
-specified using the syntax @code{[=}@var{c}@code{=]}, which
-matches all characters with the same collation weight (as defined
-by the current locale) as the character @var{c}.
-
-Within @samp{[} and @samp{]}, the syntax @code{[.}@var{symbol}@code{.]}
-matches the collating symbol @var{symbol}.
-@end table
-
-If the @code{extglob} shell option is enabled using the @code{shopt}
-builtin, several extended pattern matching operators are recognized.
-In the following description, a @var{pattern-list} is a list of one
-or more patterns separated by a @samp{|}.
-Composite patterns may be formed using one or more of the following
-sub-patterns:
-
-@table @code
-@item ?(@var{pattern-list})
-Matches zero or one occurrence of the given patterns.
-
-@item *(@var{pattern-list})
-Matches zero or more occurrences of the given patterns.
-
-@item +(@var{pattern-list})
-Matches one or more occurrences of the given patterns.
-
-@item @@(@var{pattern-list})
-Matches one of the given patterns.
-
-@item !(@var{pattern-list})
-Matches anything except one of the given patterns.
-@end table
-
-@node Quote Removal
-@subsection Quote Removal
-
-After the preceding expansions, all unquoted occurrences of the
-characters @samp{\}, @samp{'}, and @samp{"} that did not
-result from one of the above expansions are removed.
-
-@node Redirections
-@section Redirections
-@cindex redirection
-
-Before a command is executed, its input and output
-may be @var{redirected}
-using a special notation interpreted by the shell.
-Redirection may also be used to open and close files for the
-current shell execution environment. The following redirection
-operators may precede or appear anywhere within a
-simple command or may follow a command.
-Redirections are processed in the order they appear, from
-left to right.
-
-Each redirection that may be preceded by a file descriptor number
-may instead be preceded by a word of the form @{@var{varname}@}.
-In this case, for each redirection operator except
->&- and <&-, the shell will allocate a file descriptor greater
-than 10 and assign it to @{@var{varname}@}. If >&- or <&- is preceded
-by @{@var{varname}@}, the value of @var{varname} defines the file
-descriptor to close.
-
-In the following descriptions, if the file descriptor number is
-omitted, and the first character of the redirection operator is
-@samp{<}, the redirection refers to the standard input (file
-descriptor 0). If the first character of the redirection operator
-is @samp{>}, the redirection refers to the standard output (file
-descriptor 1).
-
-The word following the redirection operator in the following
-descriptions, unless otherwise noted, is subjected to brace expansion,
-tilde expansion, parameter expansion, command substitution, arithmetic
-expansion, quote removal, filename expansion, and word splitting.
-If it expands to more than one word, Bash reports an error.
-
-Note that the order of redirections is significant. For example,
-the command
-@example
-ls > @var{dirlist} 2>&1
-@end example
-@noindent
-directs both standard output (file descriptor 1) and standard error
-(file descriptor 2) to the file @var{dirlist}, while the command
-@example
-ls 2>&1 > @var{dirlist}
-@end example
-@noindent
-directs only the standard output to file @var{dirlist},
-because the standard error was made a copy of the standard output
-before the standard output was redirected to @var{dirlist}.
-
-Bash handles several filenames specially when they are used in
-redirections, as described in the following table:
-
-@table @code
-@item /dev/fd/@var{fd}
-If @var{fd} is a valid integer, file descriptor @var{fd} is duplicated.
-
-@item /dev/stdin
-File descriptor 0 is duplicated.
-
-@item /dev/stdout
-File descriptor 1 is duplicated.
-
-@item /dev/stderr
-File descriptor 2 is duplicated.
-
-@item /dev/tcp/@var{host}/@var{port}
-If @var{host} is a valid hostname or Internet address, and @var{port}
-is an integer port number or service name, Bash attempts to open a TCP
-connection to the corresponding socket.
-
-@item /dev/udp/@var{host}/@var{port}
-If @var{host} is a valid hostname or Internet address, and @var{port}
-is an integer port number or service name, Bash attempts to open a UDP
-connection to the corresponding socket.
-
-@end table
-
-A failure to open or create a file causes the redirection to fail.
-
-Redirections using file descriptors greater than 9 should be used with
-care, as they may conflict with file descriptors the shell uses
-internally.
-
-@subsection Redirecting Input
-Redirection of input causes the file whose name results from
-the expansion of @var{word}
-to be opened for reading on file descriptor @code{n},
-or the standard input (file descriptor 0) if @code{n}
-is not specified.
-
-The general format for redirecting input is:
-@example
-[@var{n}]<@var{word}
-@end example
-
-@subsection Redirecting Output
-Redirection of output causes the file whose name results from
-the expansion of @var{word}
-to be opened for writing on file descriptor @var{n},
-or the standard output (file descriptor 1) if @var{n}
-is not specified. If the file does not exist it is created;
-if it does exist it is truncated to zero size.
-
-The general format for redirecting output is:
-@example
-[@var{n}]>[|]@var{word}
-@end example
-
-If the redirection operator is @samp{>}, and the @code{noclobber}
-option to the @code{set} builtin has been enabled, the redirection
-will fail if the file whose name results from the expansion of
-@var{word} exists and is a regular file.
-If the redirection operator is @samp{>|}, or the redirection operator is
-@samp{>} and the @code{noclobber} option is not enabled, the redirection
-is attempted even if the file named by @var{word} exists.
-
-@subsection Appending Redirected Output
-Redirection of output in this fashion
-causes the file whose name results from
-the expansion of @var{word}
-to be opened for appending on file descriptor @var{n},
-or the standard output (file descriptor 1) if @var{n}
-is not specified. If the file does not exist it is created.
-
-The general format for appending output is:
-@example
-[@var{n}]>>@var{word}
-@end example
-
-@subsection Redirecting Standard Output and Standard Error
-This construct allows both the
-standard output (file descriptor 1) and
-the standard error output (file descriptor 2)
-to be redirected to the file whose name is the
-expansion of @var{word}.
-
-There are two formats for redirecting standard output and
-standard error:
-@example
-&>@var{word}
-@end example
-@noindent
-and
-@example
->&@var{word}
-@end example
-@noindent
-Of the two forms, the first is preferred.
-This is semantically equivalent to
-@example
->@var{word} 2>&1
-@end example
-(see Duplicating File Descriptors below).
-
-@subsection Appending Standard Output and Standard Error
-This construct allows both the
-standard output (file descriptor 1) and
-the standard error output (file descriptor 2)
-to be appended to the file whose name is the
-expansion of @var{word}.
-
-The format for appending standard output and standard error is:
-@example
-&>>@var{word}
-@end example
-@noindent
-This is semantically equivalent to
-@example
->>@var{word} 2>&1
-@end example
-(see Duplicating File Descriptors below).
-
-@subsection Here Documents
-This type of redirection instructs the shell to read input from the
-current source until a line containing only @var{word}
-(with no trailing blanks) is seen. All of
-the lines read up to that point are then used as the standard
-input for a command.
-
-The format of here-documents is:
-@example
-<<[@minus{}]@var{word}
- @var{here-document}
-@var{delimiter}
-@end example
-
-No parameter expansion, command substitution, arithmetic expansion,
-or filename expansion is performed on
-@var{word}. If any characters in @var{word} are quoted, the
-@var{delimiter} is the result of quote removal on @var{word},
-and the lines in the here-document are not expanded.
-If @var{word} is unquoted,
-all lines of the here-document are subjected to parameter expansion,
-command substitution, and arithmetic expansion. In the latter
-case, the character sequence @code{\newline} is ignored, and @samp{\}
-must be used to quote the characters
-@samp{\}, @samp{$}, and @samp{`}.
-
-If the redirection operator is @samp{<<-},
-then all leading tab characters are stripped from input lines and the
-line containing @var{delimiter}.
-This allows here-documents within shell scripts to be indented in a
-natural fashion.
-
-@subsection Here Strings
-A variant of here documents, the format is:
-@example
-<<< @var{word}
-@end example
-
-The @var{word}
-is expanded as described above, with the exception that
-pathname expansion is not applied, and supplied as a single string
-to the command on its standard input.
-
-@subsection Duplicating File Descriptors
-The redirection operator
-@example
-[@var{n}]<&@var{word}
-@end example
-@noindent
-is used to duplicate input file descriptors.
-If @var{word}
-expands to one or more digits, the file descriptor denoted by @var{n}
-is made to be a copy of that file descriptor.
-If the digits in @var{word} do not specify a file descriptor open for
-input, a redirection error occurs.
-If @var{word}
-evaluates to @samp{-}, file descriptor @var{n} is closed. If
-@var{n} is not specified, the standard input (file descriptor 0) is used.
-
-The operator
-@example
-[@var{n}]>&@var{word}
-@end example
-@noindent
-is used similarly to duplicate output file descriptors. If
-@var{n} is not specified, the standard output (file descriptor 1) is used.
-If the digits in @var{word} do not specify a file descriptor open for
-output, a redirection error occurs.
-As a special case, if @var{n} is omitted, and @var{word} does not
-expand to one or more digits, the standard output and standard
-error are redirected as described previously.
-
-@subsection Moving File Descriptors
-The redirection operator
-@example
-[@var{n}]<&@var{digit}-
-@end example
-@noindent
-moves the file descriptor @var{digit} to file descriptor @var{n},
-or the standard input (file descriptor 0) if @var{n} is not specified.
-@var{digit} is closed after being duplicated to @var{n}.
-
-Similarly, the redirection operator
-@example
-[@var{n}]>&@var{digit}-
-@end example
-@noindent
-moves the file descriptor @var{digit} to file descriptor @var{n},
-or the standard output (file descriptor 1) if @var{n} is not specified.
-
-@subsection Opening File Descriptors for Reading and Writing
-The redirection operator
-@example
-[@var{n}]<>@var{word}
-@end example
-@noindent
-causes the file whose name is the expansion of @var{word}
-to be opened for both reading and writing on file descriptor
-@var{n}, or on file descriptor 0 if @var{n}
-is not specified. If the file does not exist, it is created.
-
-@node Executing Commands
-@section Executing Commands
-
-@menu
-* Simple Command Expansion:: How Bash expands simple commands before
- executing them.
-* Command Search and Execution:: How Bash finds commands and runs them.
-* Command Execution Environment:: The environment in which Bash
- executes commands that are not
- shell builtins.
-* Environment:: The environment given to a command.
-* Exit Status:: The status returned by commands and how Bash
- interprets it.
-* Signals:: What happens when Bash or a command it runs
- receives a signal.
-@end menu
-
-@node Simple Command Expansion
-@subsection Simple Command Expansion
-@cindex command expansion
-
-When a simple command is executed, the shell performs the following
-expansions, assignments, and redirections, from left to right.
-
-@enumerate
-@item
-The words that the parser has marked as variable assignments (those
-preceding the command name) and redirections are saved for later
-processing.
-
-@item
-The words that are not variable assignments or redirections are
-expanded (@pxref{Shell Expansions}).
-If any words remain after expansion, the first word
-is taken to be the name of the command and the remaining words are
-the arguments.
-
-@item
-Redirections are performed as described above (@pxref{Redirections}).
-
-@item
-The text after the @samp{=} in each variable assignment undergoes tilde
-expansion, parameter expansion, command substitution, arithmetic expansion,
-and quote removal before being assigned to the variable.
-@end enumerate
-
-If no command name results, the variable assignments affect the current
-shell environment. Otherwise, the variables are added to the environment
-of the executed command and do not affect the current shell environment.
-If any of the assignments attempts to assign a value to a readonly variable,
-an error occurs, and the command exits with a non-zero status.
-
-If no command name results, redirections are performed, but do not
-affect the current shell environment. A redirection error causes the
-command to exit with a non-zero status.
-
-If there is a command name left after expansion, execution proceeds as
-described below. Otherwise, the command exits. If one of the expansions
-contained a command substitution, the exit status of the command is
-the exit status of the last command substitution performed. If there
-were no command substitutions, the command exits with a status of zero.
-
-@node Command Search and Execution
-@subsection Command Search and Execution
-@cindex command execution
-@cindex command search
-
-After a command has been split into words, if it results in a
-simple command and an optional list of arguments, the following
-actions are taken.
-
-@enumerate
-@item
-If the command name contains no slashes, the shell attempts to
-locate it. If there exists a shell function by that name, that
-function is invoked as described in @ref{Shell Functions}.
-
-@item
-If the name does not match a function, the shell searches for
-it in the list of shell builtins. If a match is found, that
-builtin is invoked.
-
-@item
-If the name is neither a shell function nor a builtin,
-and contains no slashes, Bash searches each element of
-@env{$PATH} for a directory containing an executable file
-by that name. Bash uses a hash table to remember the full
-pathnames of executable files to avoid multiple @env{PATH} searches
-(see the description of @code{hash} in @ref{Bourne Shell Builtins}).
-A full search of the directories in @env{$PATH}
-is performed only if the command is not found in the hash table.
-If the search is unsuccessful, the shell searches for a defined shell
-function named @code{command_not_found_handle}.
-If that function exists, it is invoked with the original command and
-the original command's arguments as its arguments, and the function's
-exit status becomes the exit status of the shell.
-If that function is not defined, the shell prints an error
-message and returns an exit status of 127.
-
-@item
-If the search is successful, or if the command name contains
-one or more slashes, the shell executes the named program in
-a separate execution environment.
-Argument 0 is set to the name given, and the remaining arguments
-to the command are set to the arguments supplied, if any.
-
-@item
-If this execution fails because the file is not in executable
-format, and the file is not a directory, it is assumed to be a
-@var{shell script} and the shell executes it as described in
-@ref{Shell Scripts}.
-
-@item
-If the command was not begun asynchronously, the shell waits for
-the command to complete and collects its exit status.
-
-@end enumerate
-
-@node Command Execution Environment
-@subsection Command Execution Environment
-@cindex execution environment
-
-The shell has an @var{execution environment}, which consists of the
-following:
-
-@itemize @bullet
-@item
-open files inherited by the shell at invocation, as modified by
-redirections supplied to the @code{exec} builtin
-
-@item
-the current working directory as set by @code{cd}, @code{pushd}, or
-@code{popd}, or inherited by the shell at invocation
-
-@item
-the file creation mode mask as set by @code{umask} or inherited from
-the shell's parent
-
-@item
-current traps set by @code{trap}
-
-@item
-shell parameters that are set by variable assignment or with @code{set}
-or inherited from the shell's parent in the environment
-
-@item
-shell functions defined during execution or inherited from the shell's
-parent in the environment
-
-@item
-options enabled at invocation (either by default or with command-line
-arguments) or by @code{set}
-
-@item
-options enabled by @code{shopt} (@pxref{The Shopt Builtin})
-
-@item
-shell aliases defined with @code{alias} (@pxref{Aliases})
-
-@item
-various process @sc{id}s, including those of background jobs
-(@pxref{Lists}), the value of @code{$$}, and the value of
-@env{$PPID}
-
-@end itemize
-
-When a simple command other than a builtin or shell function
-is to be executed, it
-is invoked in a separate execution environment that consists of
-the following. Unless otherwise noted, the values are inherited
-from the shell.
-
-@itemize @bullet
-@item
-the shell's open files, plus any modifications and additions specified
-by redirections to the command
-
-@item
-the current working directory
-
-@item
-the file creation mode mask
-
-@item
-shell variables and functions marked for export, along with variables
-exported for the command, passed in the environment (@pxref{Environment})
-
-@item
-traps caught by the shell are reset to the values inherited from the
-shell's parent, and traps ignored by the shell are ignored
-
-@end itemize
-
-A command invoked in this separate environment cannot affect the
-shell's execution environment.
-
-Command substitution, commands grouped with parentheses,
-and asynchronous commands are invoked in a
-subshell environment that is a duplicate of the shell environment,
-except that traps caught by the shell are reset to the values
-that the shell inherited from its parent at invocation. Builtin
-commands that are invoked as part of a pipeline are also executed
-in a subshell environment. Changes made to the subshell environment
-cannot affect the shell's execution environment.
-
-Subshells spawned to execute command substitutions inherit the value of
-the @option{-e} option from the parent shell. When not in @sc{posix} mode,
-Bash clears the @option{-e} option in such subshells.
-
-If a command is followed by a @samp{&} and job control is not active, the
-default standard input for the command is the empty file @file{/dev/null}.
-Otherwise, the invoked command inherits the file descriptors of the calling
-shell as modified by redirections.
-
-@node Environment
-@subsection Environment
-@cindex environment
-
-When a program is invoked it is given an array of strings
-called the @var{environment}.
-This is a list of name-value pairs, of the form @code{name=value}.
-
-Bash provides several ways to manipulate the environment.
-On invocation, the shell scans its own environment and
-creates a parameter for each name found, automatically marking
-it for @var{export}
-to child processes. Executed commands inherit the environment.
-The @code{export} and @samp{declare -x}
-commands allow parameters and functions to be added to and
-deleted from the environment. If the value of a parameter
-in the environment is modified, the new value becomes part
-of the environment, replacing the old. The environment
-inherited by any executed command consists of the shell's
-initial environment, whose values may be modified in the shell,
-less any pairs removed by the @code{unset} and @samp{export -n}
-commands, plus any additions via the @code{export} and
-@samp{declare -x} commands.
-
-The environment for any simple command
-or function may be augmented temporarily by prefixing it with
-parameter assignments, as described in @ref{Shell Parameters}.
-These assignment statements affect only the environment seen
-by that command.
-
-If the @option{-k} option is set (@pxref{The Set Builtin}), then all
-parameter assignments are placed in the environment for a command,
-not just those that precede the command name.
-
-When Bash invokes an external command, the variable @samp{$_}
-is set to the full path name of the command and passed to that
-command in its environment.
-
-@node Exit Status
-@subsection Exit Status
-@cindex exit status
-
-The exit status of an executed command is the value returned by the
-@var{waitpid} system call or equivalent function. Exit statuses
-fall between 0 and 255, though, as explained below, the shell may
-use values above 125 specially. Exit statuses from shell builtins and
-compound commands are also limited to this range. Under certain
-circumstances, the shell will use special values to indicate specific
-failure modes.
-
-For the shell's purposes, a command which exits with a
-zero exit status has succeeded.
-A non-zero exit status indicates failure.
-This seemingly counter-intuitive scheme is used so there
-is one well-defined way to indicate success and a variety of
-ways to indicate various failure modes.
-When a command terminates on a fatal signal whose number is @var{N},
-Bash uses the value 128+@var{N} as the exit status.
-
-If a command is not found, the child process created to
-execute it returns a status of 127. If a command is found
-but is not executable, the return status is 126.
-
-If a command fails because of an error during expansion or redirection,
-the exit status is greater than zero.
-
-The exit status is used by the Bash conditional commands
-(@pxref{Conditional Constructs}) and some of the list
-constructs (@pxref{Lists}).
-
-All of the Bash builtins return an exit status of zero if they succeed
-and a non-zero status on failure, so they may be used by the
-conditional and list constructs.
-All builtins return an exit status of 2 to indicate incorrect usage.
-
-@node Signals
-@subsection Signals
-@cindex signal handling
-
-When Bash is interactive, in the absence of any traps, it ignores
-@code{SIGTERM} (so that @samp{kill 0} does not kill an interactive shell),
-and @code{SIGINT}
-is caught and handled (so that the @code{wait} builtin is interruptible).
-When Bash receives a @code{SIGINT}, it breaks out of any executing loops.
-In all cases, Bash ignores @code{SIGQUIT}.
-If job control is in effect (@pxref{Job Control}), Bash
-ignores @code{SIGTTIN}, @code{SIGTTOU}, and @code{SIGTSTP}.
-
-Non-builtin commands started by Bash have signal handlers set to the
-values inherited by the shell from its parent.
-When job control is not in effect, asynchronous commands
-ignore @code{SIGINT} and @code{SIGQUIT} in addition to these inherited
-handlers.
-Commands run as a result of
-command substitution ignore the keyboard-generated job control signals
-@code{SIGTTIN}, @code{SIGTTOU}, and @code{SIGTSTP}.
-
-The shell exits by default upon receipt of a @code{SIGHUP}.
-Before exiting, an interactive shell resends the @code{SIGHUP} to
-all jobs, running or stopped.
-Stopped jobs are sent @code{SIGCONT} to ensure that they receive
-the @code{SIGHUP}.
-To prevent the shell from sending the @code{SIGHUP} signal to a
-particular job, it should be removed
-from the jobs table with the @code{disown}
-builtin (@pxref{Job Control Builtins}) or marked
-to not receive @code{SIGHUP} using @code{disown -h}.
-
-If the @code{huponexit} shell option has been set with @code{shopt}
-(@pxref{The Shopt Builtin}), Bash sends a @code{SIGHUP} to all jobs when
-an interactive login shell exits.
-
-If Bash is waiting for a command to complete and receives a signal
-for which a trap has been set, the trap will not be executed until
-the command completes.
-When Bash is waiting for an asynchronous
-command via the @code{wait} builtin, the reception of a signal for
-which a trap has been set will cause the @code{wait} builtin to return
-immediately with an exit status greater than 128, immediately after
-which the trap is executed.
-
-@node Shell Scripts
-@section Shell Scripts
-@cindex shell script
-
-A shell script is a text file containing shell commands. When such
-a file is used as the first non-option argument when invoking Bash,
-and neither the @option{-c} nor @option{-s} option is supplied
-(@pxref{Invoking Bash}),
-Bash reads and executes commands from the file, then exits. This
-mode of operation creates a non-interactive shell. The shell first
-searches for the file in the current directory, and looks in the
-directories in @env{$PATH} if not found there.
-
-When Bash runs
-a shell script, it sets the special parameter @code{0} to the name
-of the file, rather than the name of the shell, and the positional
-parameters are set to the remaining arguments, if any are given.
-If no additional arguments are supplied, the positional parameters
-are unset.
-
-A shell script may be made executable by using the @code{chmod} command
-to turn on the execute bit. When Bash finds such a file while
-searching the @env{$PATH} for a command, it spawns a subshell to
-execute it. In other words, executing
-@example
-filename @var{arguments}
-@end example
-@noindent
-is equivalent to executing
-@example
-bash filename @var{arguments}
-@end example
-
-@noindent
-if @code{filename} is an executable shell script.
-This subshell reinitializes itself, so that the effect is as if a
-new shell had been invoked to interpret the script, with the
-exception that the locations of commands remembered by the parent
-(see the description of @code{hash} in @ref{Bourne Shell Builtins})
-are retained by the child.
-
-Most versions of Unix make this a part of the operating system's command
-execution mechanism. If the first line of a script begins with
-the two characters @samp{#!}, the remainder of the line specifies
-an interpreter for the program.
-Thus, you can specify Bash, @code{awk}, Perl, or some other
-interpreter and write the rest of the script file in that language.
-
-The arguments to the interpreter
-consist of a single optional argument following the interpreter
-name on the first line of the script file, followed by the name of
-the script file, followed by the rest of the arguments. Bash
-will perform this action on operating systems that do not handle it
-themselves. Note that some older versions of Unix limit the interpreter
-name and argument to a maximum of 32 characters.
-
-Bash scripts often begin with @code{#! /bin/bash} (assuming that
-Bash has been installed in @file{/bin}), since this ensures that
-Bash will be used to interpret the script, even if it is executed
-under another shell.
-
-@node Shell Builtin Commands
-@chapter Shell Builtin Commands
-
-@menu
-* Bourne Shell Builtins:: Builtin commands inherited from the Bourne
- Shell.
-* Bash Builtins:: Table of builtins specific to Bash.
-* Modifying Shell Behavior:: Builtins to modify shell attributes and
- optional behavior.
-* Special Builtins:: Builtin commands classified specially by
- POSIX.
-@end menu
-
-Builtin commands are contained within the shell itself.
-When the name of a builtin command is used as the first word of
-a simple command (@pxref{Simple Commands}), the shell executes
-the command directly, without invoking another program.
-Builtin commands are necessary to implement functionality impossible
-or inconvenient to obtain with separate utilities.
-
-This section briefly describes the builtins which Bash inherits from
-the Bourne Shell, as well as the builtin commands which are unique
-to or have been extended in Bash.
-
-Several builtin commands are described in other chapters: builtin
-commands which provide the Bash interface to the job control
-facilities (@pxref{Job Control Builtins}), the directory stack
-(@pxref{Directory Stack Builtins}), the command history
-(@pxref{Bash History Builtins}), and the programmable completion
-facilities (@pxref{Programmable Completion Builtins}).
-
-Many of the builtins have been extended by @sc{posix} or Bash.
-
-Unless otherwise noted, each builtin command documented as accepting
-options preceded by @samp{-} accepts @samp{--}
-to signify the end of the options.
-The @code{:}, @code{true}, @code{false}, and @code{test}
-builtins do not accept options and do not treat @samp{--} specially.
-The @code{exit}, @code{logout}, @code{break}, @code{continue}, @code{let},
-and @code{shift} builtins accept and process arguments beginning
-with @samp{-} without requiring @samp{--}.
-Other builtins that accept arguments but are not specified as accepting
-options interpret arguments beginning with @samp{-} as invalid options and
-require @samp{--} to prevent this interpretation.
-
-@node Bourne Shell Builtins
-@section Bourne Shell Builtins
-
-The following shell builtin commands are inherited from the Bourne Shell.
-These commands are implemented as specified by the @sc{posix} standard.
-
-@table @code
-@item : @r{(a colon)}
-@btindex :
-@example
-: [@var{arguments}]
-@end example
-Do nothing beyond expanding @var{arguments} and performing redirections.
-The return status is zero.
-
-@item . @r{(a period)}
-@btindex .
-@example
-. @var{filename} [@var{arguments}]
-@end example
-Read and execute commands from the @var{filename} argument in the
-current shell context. If @var{filename} does not contain a slash,
-the @env{PATH} variable is used to find @var{filename}.
-When Bash is not in @sc{posix} mode, the current directory is searched
-if @var{filename} is not found in @env{$PATH}.
-If any @var{arguments} are supplied, they become the positional
-parameters when @var{filename} is executed. Otherwise the positional
-parameters are unchanged.
-The return status is the exit status of the last command executed, or
-zero if no commands are executed. If @var{filename} is not found, or
-cannot be read, the return status is non-zero.
-This builtin is equivalent to @code{source}.
-
-@item break
-@btindex break
-@example
-break [@var{n}]
-@end example
-Exit from a @code{for}, @code{while}, @code{until}, or @code{select} loop.
-If @var{n} is supplied, the @var{n}th enclosing loop is exited.
-@var{n} must be greater than or equal to 1.
-The return status is zero unless @var{n} is not greater than or equal to 1.
-
-@item cd
-@btindex cd
-@example
-cd [-L|[-P [-e]]] [@var{directory}]
-@end example
-Change the current working directory to @var{directory}.
-If @var{directory} is not given, the value of the @env{HOME} shell
-variable is used.
-If the shell variable @env{CDPATH} exists, it is used as a search path.
-If @var{directory} begins with a slash, @env{CDPATH} is not used.
-
-The @option{-P} option means to not follow symbolic links; symbolic
-links are followed by default or with the @option{-L} option.
-If the @option{-e} option is supplied with @option{-P}
-and the current working directory cannot be successfully determined
-after a successful directory change, @code{cd} will return an unsuccessful
-status.
-If @var{directory} is @samp{-}, it is equivalent to @env{$OLDPWD}.
-
-If a non-empty directory name from @env{CDPATH} is used, or if
-@samp{-} is the first argument, and the directory change is
-successful, the absolute pathname of the new working directory is
-written to the standard output.
-
-The return status is zero if the directory is successfully changed,
-non-zero otherwise.
-
-@item continue
-@btindex continue
-@example
-continue [@var{n}]
-@end example
-Resume the next iteration of an enclosing @code{for}, @code{while},
-@code{until}, or @code{select} loop.
-If @var{n} is supplied, the execution of the @var{n}th enclosing loop
-is resumed.
-@var{n} must be greater than or equal to 1.
-The return status is zero unless @var{n} is not greater than or equal to 1.
-
-@item eval
-@btindex eval
-@example
-eval [@var{arguments}]
-@end example
-The arguments are concatenated together into a single command, which is
-then read and executed, and its exit status returned as the exit status
-of @code{eval}.
-If there are no arguments or only empty arguments, the return status is
-zero.
-
-@item exec
-@btindex exec
-@example
-exec [-cl] [-a @var{name}] [@var{command} [@var{arguments}]]
-@end example
-If @var{command}
-is supplied, it replaces the shell without creating a new process.
-If the @option{-l} option is supplied, the shell places a dash at the
-beginning of the zeroth argument passed to @var{command}.
-This is what the @code{login} program does.
-The @option{-c} option causes @var{command} to be executed with an empty
-environment.
-If @option{-a} is supplied, the shell passes @var{name} as the zeroth
-argument to @var{command}.
-If no @var{command} is specified, redirections may be used to affect
-the current shell environment. If there are no redirection errors, the
-return status is zero; otherwise the return status is non-zero.
-
-@item exit
-@btindex exit
-@example
-exit [@var{n}]
-@end example
-Exit the shell, returning a status of @var{n} to the shell's parent.
-If @var{n} is omitted, the exit status is that of the last command executed.
-Any trap on @code{EXIT} is executed before the shell terminates.
-
-@item export
-@btindex export
-@example
-export [-fn] [-p] [@var{name}[=@var{value}]]
-@end example
-Mark each @var{name} to be passed to child processes
-in the environment. If the @option{-f} option is supplied, the @var{name}s
-refer to shell functions; otherwise the names refer to shell variables.
-The @option{-n} option means to no longer mark each @var{name} for export.
-If no @var{names} are supplied, or if the @option{-p} option is given, a
-list of exported names is displayed.
-The @option{-p} option displays output in a form that may be reused as input.
-If a variable name is followed by =@var{value}, the value of
-the variable is set to @var{value}.
-
-The return status is zero unless an invalid option is supplied, one of
-the names is not a valid shell variable name, or @option{-f} is supplied
-with a name that is not a shell function.
-
-@item getopts
-@btindex getopts
-@example
-getopts @var{optstring} @var{name} [@var{args}]
-@end example
-@code{getopts} is used by shell scripts to parse positional parameters.
-@var{optstring} contains the option characters to be recognized; if a
-character is followed by a colon, the option is expected to have an
-argument, which should be separated from it by white space.
-The colon (@samp{:}) and question mark (@samp{?}) may not be
-used as option characters.
-Each time it is invoked, @code{getopts}
-places the next option in the shell variable @var{name}, initializing
-@var{name} if it does not exist,
-and the index of the next argument to be processed into the
-variable @env{OPTIND}.
-@env{OPTIND} is initialized to 1 each time the shell or a shell script
-is invoked.
-When an option requires an argument,
-@code{getopts} places that argument into the variable @env{OPTARG}.
-The shell does not reset @env{OPTIND} automatically; it must be manually
-reset between multiple calls to @code{getopts} within the same shell
-invocation if a new set of parameters is to be used.
-
-When the end of options is encountered, @code{getopts} exits with a
-return value greater than zero.
-@env{OPTIND} is set to the index of the first non-option argument,
-and @var{name} is set to @samp{?}.
-
-@code{getopts}
-normally parses the positional parameters, but if more arguments are
-given in @var{args}, @code{getopts} parses those instead.
-
-@code{getopts} can report errors in two ways. If the first character of
-@var{optstring} is a colon, @var{silent}
-error reporting is used. In normal operation diagnostic messages
-are printed when invalid options or missing option arguments are
-encountered.
-If the variable @env{OPTERR}
-is set to 0, no error messages will be displayed, even if the first
-character of @code{optstring} is not a colon.
-
-If an invalid option is seen,
-@code{getopts} places @samp{?} into @var{name} and, if not silent,
-prints an error message and unsets @env{OPTARG}.
-If @code{getopts} is silent, the option character found is placed in
-@env{OPTARG} and no diagnostic message is printed.
-
-If a required argument is not found, and @code{getopts}
-is not silent, a question mark (@samp{?}) is placed in @var{name},
-@code{OPTARG} is unset, and a diagnostic message is printed.
-If @code{getopts} is silent, then a colon (@samp{:}) is placed in
-@var{name} and @env{OPTARG} is set to the option character found.
-
-@item hash
-@btindex hash
-@example
-hash [-r] [-p @var{filename}] [-dt] [@var{name}]
-@end example
-Each time @code{hash} is invoked, it remembers the full pathnames of the
-commands specified as @var{name} arguments,
-so they need not be searched for on subsequent invocations.
-The commands are found by searching through the directories listed in
-@env{$PATH}.
-Any previously-remembered pathname is discarded.
-The @option{-p} option inhibits the path search, and @var{filename} is
-used as the location of @var{name}.
-The @option{-r} option causes the shell to forget all remembered locations.
-The @option{-d} option causes the shell to forget the remembered location
-of each @var{name}.
-If the @option{-t} option is supplied, the full pathname to which each
-@var{name} corresponds is printed. If multiple @var{name} arguments are
-supplied with @option{-t} the @var{name} is printed before the hashed
-full pathname.
-The @option{-l} option causes output to be displayed in a format
-that may be reused as input.
-If no arguments are given, or if only @option{-l} is supplied,
-information about remembered commands is printed.
-The return status is zero unless a @var{name} is not found or an invalid
-option is supplied.
-
-@item pwd
-@btindex pwd
-@example
-pwd [-LP]
-@end example
-Print the absolute pathname of the current working directory.
-If the @option{-P} option is supplied, the pathname printed will not
-contain symbolic links.
-If the @option{-L} option is supplied, the pathname printed may contain
-symbolic links.
-The return status is zero unless an error is encountered while
-determining the name of the current directory or an invalid option
-is supplied.
-
-@item readonly
-@btindex readonly
-@example
-readonly [-aAf] [-p] [@var{name}[=@var{value}]] @dots{}
-@end example
-Mark each @var{name} as readonly.
-The values of these names may not be changed by subsequent assignment.
-If the @option{-f} option is supplied, each @var{name} refers to a shell
-function.
-The @option{-a} option means each @var{name} refers to an indexed
-array variable; the @option{-A} option means each @var{name} refers
-to an associative array variable.
-If both options are supplied, @option{-A} takes precedence.
-If no @var{name} arguments are given, or if the @option{-p}
-option is supplied, a list of all readonly names is printed.
-The other options may be used to restrict the output to a subset of
-the set of readonly names.
-The @option{-p} option causes output to be displayed in a format that
-may be reused as input.
-If a variable name is followed by =@var{value}, the value of
-the variable is set to @var{value}.
-The return status is zero unless an invalid option is supplied, one of
-the @var{name} arguments is not a valid shell variable or function name,
-or the @option{-f} option is supplied with a name that is not a shell function.
-
-@item return
-@btindex return
-@example
-return [@var{n}]
-@end example
-Cause a shell function to exit with the return value @var{n}.
-If @var{n} is not supplied, the return value is the exit status of the
-last command executed in the function.
-This may also be used to terminate execution of a script being executed
-with the @code{.} (or @code{source}) builtin, returning either @var{n} or
-the exit status of the last command executed within the script as the exit
-status of the script.
-Any command associated with the @code{RETURN} trap is executed
-before execution resumes after the function or script.
-The return status is non-zero if @code{return} is used outside a function
-and not during the execution of a script by @code{.} or @code{source}.
-
-@item shift
-@btindex shift
-@example
-shift [@var{n}]
-@end example
-Shift the positional parameters to the left by @var{n}.
-The positional parameters from @var{n}+1 @dots{} @code{$#} are
-renamed to @code{$1} @dots{} @code{$#}-@var{n}.
-Parameters represented by the numbers @code{$#} to @code{$#}-@var{n}+1
-are unset.
-@var{n} must be a non-negative number less than or equal to @code{$#}.
-If @var{n} is zero or greater than @code{$#}, the positional parameters
-are not changed.
-If @var{n} is not supplied, it is assumed to be 1.
-The return status is zero unless @var{n} is greater than @code{$#} or
-less than zero, non-zero otherwise.
-
-@item test
-@itemx [
-@btindex test
-@btindex [
-Evaluate a conditional expression @var{expr}.
-Each operator and operand must be a separate argument.
-Expressions are composed of the primaries described below in
-@ref{Bash Conditional Expressions}.
-@code{test} does not accept any options, nor does it accept and ignore
-an argument of @option{--} as signifying the end of options.
-
-When the @code{[} form is used, the last argument to the command must
-be a @code{]}.
-
-Expressions may be combined using the following operators, listed in
-decreasing order of precedence.
-The evaluation depends on the number of arguments; see below.
-Operator precedence is used when there are five or more arguments.
-
-@table @code
-@item ! @var{expr}
-True if @var{expr} is false.
-
-@item ( @var{expr} )
-Returns the value of @var{expr}.
-This may be used to override the normal precedence of operators.
-
-@item @var{expr1} -a @var{expr2}
-True if both @var{expr1} and @var{expr2} are true.
-
-@item @var{expr1} -o @var{expr2}
-True if either @var{expr1} or @var{expr2} is true.
-@end table
-
-The @code{test} and @code{[} builtins evaluate conditional
-expressions using a set of rules based on the number of arguments.
-
-@table @asis
-@item 0 arguments
-The expression is false.
-
-@item 1 argument
-The expression is true if and only if the argument is not null.
-
-@item 2 arguments
-If the first argument is @samp{!}, the expression is true if and
-only if the second argument is null.
-If the first argument is one of the unary conditional operators
-(@pxref{Bash Conditional Expressions}), the expression
-is true if the unary test is true.
-If the first argument is not a valid unary operator, the expression is
-false.
-
-@item 3 arguments
-The following conditions are applied in the order listed.
-If the second argument is one of the binary conditional
-operators (@pxref{Bash Conditional Expressions}), the
-result of the expression is the result of the binary test using the
-first and third arguments as operands.
-The @samp{-a} and @samp{-o} operators are considered binary operators
-when there are three arguments.
-If the first argument is @samp{!}, the value is the negation of
-the two-argument test using the second and third arguments.
-If the first argument is exactly @samp{(} and the third argument is
-exactly @samp{)}, the result is the one-argument test of the second
-argument.
-Otherwise, the expression is false.
-
-@item 4 arguments
-If the first argument is @samp{!}, the result is the negation of
-the three-argument expression composed of the remaining arguments.
-Otherwise, the expression is parsed and evaluated according to
-precedence using the rules listed above.
-
-@item 5 or more arguments
-The expression is parsed and evaluated according to precedence
-using the rules listed above.
-@end table
-
-When used with @code{test} or @samp{[}, the @samp{<} and @samp{>}
-operators sort lexicographically using ASCII ordering.
-
-@item times
-@btindex times
-@example
-times
-@end example
-Print out the user and system times used by the shell and its children.
-The return status is zero.
-
-@item trap
-@btindex trap
-@example
-trap [-lp] [@var{arg}] [@var{sigspec} @dots{}]
-@end example
-The commands in @var{arg} are to be read and executed when the
-shell receives signal @var{sigspec}. If @var{arg} is absent (and
-there is a single @var{sigspec}) or
-equal to @samp{-}, each specified signal's disposition is reset
-to the value it had when the shell was started.
-If @var{arg} is the null string, then the signal specified by
-each @var{sigspec} is ignored by the shell and commands it invokes.
-If @var{arg} is not present and @option{-p} has been supplied,
-the shell displays the trap commands associated with each @var{sigspec}.
-If no arguments are supplied, or
-only @option{-p} is given, @code{trap} prints the list of commands
-associated with each signal number in a form that may be reused as
-shell input.
-The @option{-l} option causes the shell to print a list of signal names
-and their corresponding numbers.
-Each @var{sigspec} is either a signal name or a signal number.
-Signal names are case insensitive and the @code{SIG} prefix is optional.
-
-If a @var{sigspec}
-is @code{0} or @code{EXIT}, @var{arg} is executed when the shell exits.
-If a @var{sigspec} is @code{DEBUG}, the command @var{arg} is executed
-before every simple command, @code{for} command, @code{case} command,
-@code{select} command, every arithmetic @code{for} command, and before
-the first command executes in a shell function.
-Refer to the description of the @code{extdebug} option to the
-@code{shopt} builtin (@pxref{The Shopt Builtin}) for details of its
-effect on the @code{DEBUG} trap.
-If a @var{sigspec} is @code{RETURN}, the command @var{arg} is executed
-each time a shell function or a script executed with the @code{.} or
-@code{source} builtins finishes executing.
-
-If a @var{sigspec} is @code{ERR}, the command @var{arg}
-is executed whenever a simple command has a non-zero exit status,
-subject to the following conditions.
-The @code{ERR} trap is not executed if the failed command is part of the
-command list immediately following an @code{until} or @code{while} keyword,
-part of the test following the @code{if} or @code{elif} reserved words,
-part of a command executed in a @code{&&} or @code{||} list,
-or if the command's return
-status is being inverted using @code{!}.
-These are the same conditions obeyed by the @code{errexit} option.
-
-Signals ignored upon entry to the shell cannot be trapped or reset.
-Trapped signals that are not being ignored are reset to their original
-values in a subshell or subshell environment when one is created.
-
-The return status is zero unless a @var{sigspec} does not specify a
-valid signal.
-
-@item umask
-@btindex umask
-@example
-umask [-p] [-S] [@var{mode}]
-@end example
-Set the shell process's file creation mask to @var{mode}. If
-@var{mode} begins with a digit, it is interpreted as an octal number;
-if not, it is interpreted as a symbolic mode mask similar
-to that accepted by the @code{chmod} command. If @var{mode} is
-omitted, the current value of the mask is printed. If the @option{-S}
-option is supplied without a @var{mode} argument, the mask is printed
-in a symbolic format.
-If the @option{-p} option is supplied, and @var{mode}
-is omitted, the output is in a form that may be reused as input.
-The return status is zero if the mode is successfully changed or if
-no @var{mode} argument is supplied, and non-zero otherwise.
-
-Note that when the mode is interpreted as an octal number, each number
-of the umask is subtracted from @code{7}. Thus, a umask of @code{022}
-results in permissions of @code{755}.
-
-@item unset
-@btindex unset
-@example
-unset [-fv] [@var{name}]
-@end example
-Each variable or function @var{name} is removed.
-If the @option{-v} option is given, each
-@var{name} refers to a shell variable and that variable is remvoved.
-If the @option{-f} option is given, the @var{name}s refer to shell
-functions, and the function definition is removed.
-If no options are supplied, each @var{name} refers to a variable; if
-there is no variable by that name, any function with that name is
-unset.
-Readonly variables and functions may not be unset.
-The return status is zero unless a @var{name} is readonly.
-@end table
-
-@node Bash Builtins
-@section Bash Builtin Commands
-
-This section describes builtin commands which are unique to
-or have been extended in Bash.
-Some of these commands are specified in the @sc{posix} standard.
-
-@table @code
-
-@item alias
-@btindex alias
-@example
-alias [@code{-p}] [@var{name}[=@var{value}] @dots{}]
-@end example
-
-Without arguments or with the @option{-p} option, @code{alias} prints
-the list of aliases on the standard output in a form that allows
-them to be reused as input.
-If arguments are supplied, an alias is defined for each @var{name}
-whose @var{value} is given. If no @var{value} is given, the name
-and value of the alias is printed.
-Aliases are described in @ref{Aliases}.
-
-@item bind
-@btindex bind
-@example
-bind [-m @var{keymap}] [-lpsvPSV]
-bind [-m @var{keymap}] [-q @var{function}] [-u @var{function}] [-r @var{keyseq}]
-bind [-m @var{keymap}] -f @var{filename}
-bind [-m @var{keymap}] -x @var{keyseq:shell-command}
-bind [-m @var{keymap}] @var{keyseq:function-name}
-bind @var{readline-command}
-@end example
-
-Display current Readline (@pxref{Command Line Editing})
-key and function bindings,
-bind a key sequence to a Readline function or macro,
-or set a Readline variable.
-Each non-option argument is a command as it would appear in a
-Readline initialization file (@pxref{Readline Init File}),
-but each binding or command must be passed as a separate argument; e.g.,
-@samp{"\C-x\C-r":re-read-init-file}.
-
-Options, if supplied, have the following meanings:
-
-@table @code
-@item -m @var{keymap}
-Use @var{keymap} as the keymap to be affected by
-the subsequent bindings. Acceptable @var{keymap}
-names are
-@code{emacs},
-@code{emacs-standard},
-@code{emacs-meta},
-@code{emacs-ctlx},
-@code{vi},
-@code{vi-move},
-@code{vi-command}, and
-@code{vi-insert}.
-@code{vi} is equivalent to @code{vi-command};
-@code{emacs} is equivalent to @code{emacs-standard}.
-
-@item -l
-List the names of all Readline functions.
-
-@item -p
-Display Readline function names and bindings in such a way that they
-can be used as input or in a Readline initialization file.
-
-@item -P
-List current Readline function names and bindings.
-
-@item -v
-Display Readline variable names and values in such a way that they
-can be used as input or in a Readline initialization file.
-
-@item -V
-List current Readline variable names and values.
-
-@item -s
-Display Readline key sequences bound to macros and the strings they output
-in such a way that they can be used as input or in a Readline
-initialization file.
-
-@item -S
-Display Readline key sequences bound to macros and the strings they output.
-
-@item -f @var{filename}
-Read key bindings from @var{filename}.
-
-@item -q @var{function}
-Query about which keys invoke the named @var{function}.
-
-@item -u @var{function}
-Unbind all keys bound to the named @var{function}.
-
-@item -r @var{keyseq}
-Remove any current binding for @var{keyseq}.
-
-@item -x @var{keyseq:shell-command}
-Cause @var{shell-command} to be executed whenever @var{keyseq} is
-entered.
-When @var{shell-command} is executed, the shell sets the
-@code{READLINE_LINE} variable to the contents of the Readline line
-buffer and the @code{READLINE_POINT} variable to the current location
-of the insertion point.
-If the executed command changes the value of @code{READLINE_LINE} or
-@code{READLINE_POINT}, those new values will be reflected in the
-editing state.
-@end table
-
-@noindent
-The return status is zero unless an invalid option is supplied or an
-error occurs.
-
-@item builtin
-@btindex builtin
-@example
-builtin [@var{shell-builtin} [@var{args}]]
-@end example
-Run a shell builtin, passing it @var{args}, and return its exit status.
-This is useful when defining a shell function with the same
-name as a shell builtin, retaining the functionality of the builtin within
-the function.
-The return status is non-zero if @var{shell-builtin} is not a shell
-builtin command.
-
-@item caller
-@btindex caller
-@example
-caller [@var{expr}]
-@end example
-Returns the context of any active subroutine call (a shell function or
-a script executed with the @code{.} or @code{source} builtins).
-
-Without @var{expr}, @code{caller} displays the line number and source
-filename of the current subroutine call.
-If a non-negative integer is supplied as @var{expr}, @code{caller}
-displays the line number, subroutine name, and source file corresponding
-to that position in the current execution call stack. This extra
-information may be used, for example, to print a stack trace. The
-current frame is frame 0.
-
-The return value is 0 unless the shell is not executing a subroutine
-call or @var{expr} does not correspond to a valid position in the
-call stack.
-
-@item command
-@btindex command
-@example
-command [-pVv] @var{command} [@var{arguments} @dots{}]
-@end example
-Runs @var{command} with @var{arguments} ignoring any shell function
-named @var{command}.
-Only shell builtin commands or commands found by searching the
-@env{PATH} are executed.
-If there is a shell function named @code{ls}, running @samp{command ls}
-within the function will execute the external command @code{ls}
-instead of calling the function recursively.
-The @option{-p} option means to use a default value for @env{PATH}
-that is guaranteed to find all of the standard utilities.
-The return status in this case is 127 if @var{command} cannot be
-found or an error occurred, and the exit status of @var{command}
-otherwise.
-
-If either the @option{-V} or @option{-v} option is supplied, a
-description of @var{command} is printed. The @option{-v} option
-causes a single word indicating the command or file name used to
-invoke @var{command} to be displayed; the @option{-V} option produces
-a more verbose description. In this case, the return status is
-zero if @var{command} is found, and non-zero if not.
-
-@item declare
-@btindex declare
-@example
-declare [-aAfFilrtux] [-p] [@var{name}[=@var{value}] @dots{}]
-@end example
-
-Declare variables and give them attributes. If no @var{name}s
-are given, then display the values of variables instead.
-
-The @option{-p} option will display the attributes and values of each
-@var{name}.
-When @option{-p} is used with @var{name} arguments, additional options
-are ignored.
-
-When @option{-p} is supplied without @var{name} arguments, @code{declare}
-will display the attributes and values of all variables having the
-attributes specified by the additional options.
-If no other options are supplied with @option{-p}, @code{declare} will
-display the attributes and values of all shell variables. The @option{-f}
-option will restrict the display to shell functions.
-
-The @option{-F} option inhibits the display of function definitions;
-only the function name and attributes are printed.
-If the @code{extdebug} shell option is enabled using @code{shopt}
-(@pxref{The Shopt Builtin}), the source file name and line number where
-the function is defined are displayed as well.
-@option{-F} implies @option{-f}.
-
-The @option{-g} option forces variables to be created or modified at
-the global scope, even when @code{declare} is executed in a shell function.
-It is ignored in all other cases.
-
-The following options can be used to restrict output to variables with
-the specified attributes or to give variables attributes:
-
-@table @code
-@item -a
-Each @var{name} is an indexed array variable (@pxref{Arrays}).
-
-@item -A
-Each @var{name} is an associative array variable (@pxref{Arrays}).
-
-@item -f
-Use function names only.
-
-@item -i
-The variable is to be treated as
-an integer; arithmetic evaluation (@pxref{Shell Arithmetic}) is
-performed when the variable is assigned a value.
-
-@item -l
-When the variable is assigned a value, all upper-case characters are
-converted to lower-case.
-The upper-case attribute is disabled.
-
-@item -r
-Make @var{name}s readonly. These names cannot then be assigned values
-by subsequent assignment statements or unset.
-
-@item -t
-Give each @var{name} the @code{trace} attribute.
-Traced functions inherit the @code{DEBUG} and @code{RETURN} traps from
-the calling shell.
-The trace attribute has no special meaning for variables.
-
-@item -u
-When the variable is assigned a value, all lower-case characters are
-converted to upper-case.
-The lower-case attribute is disabled.
-
-@item -x
-Mark each @var{name} for export to subsequent commands via
-the environment.
-@end table
-
-Using @samp{+} instead of @samp{-} turns off the attribute instead,
-with the exceptions that @samp{+a}
-may not be used to destroy an array variable and @samp{+r} will not
-remove the readonly attribute.
-When used in a function, @code{declare} makes each @var{name} local,
-as with the @code{local} command, unless the @samp{-g} option is used.
-If a variable name is followed by =@var{value}, the value of the variable
-is set to @var{value}.
-
-The return status is zero unless an invalid option is encountered,
-an attempt is made to define a function using @samp{-f foo=bar},
-an attempt is made to assign a value to a readonly variable,
-an attempt is made to assign a value to an array variable without
-using the compound assignment syntax (@pxref{Arrays}),
-one of the @var{names} is not a valid shell variable name,
-an attempt is made to turn off readonly status for a readonly variable,
-an attempt is made to turn off array status for an array variable,
-or an attempt is made to display a non-existent function with @option{-f}.
-
-@item echo
-@btindex echo
-@example
-echo [-neE] [@var{arg} @dots{}]
-@end example
-Output the @var{arg}s, separated by spaces, terminated with a
-newline.
-The return status is 0 unless a write error occurs.
-If @option{-n} is specified, the trailing newline is suppressed.
-If the @option{-e} option is given, interpretation of the following
-backslash-escaped characters is enabled.
-The @option{-E} option disables the interpretation of these escape characters,
-even on systems where they are interpreted by default.
-The @code{xpg_echo} shell option may be used to
-dynamically determine whether or not @code{echo} expands these
-escape characters by default.
-@code{echo} does not interpret @option{--} to mean the end of options.
-
-@code{echo} interprets the following escape sequences:
-@table @code
-@item \a
-alert (bell)
-@item \b
-backspace
-@item \c
-suppress further output
-@item \e
-@itemx \E
-escape
-@item \f
-form feed
-@item \n
-new line
-@item \r
-carriage return
-@item \t
-horizontal tab
-@item \v
-vertical tab
-@item \\
-backslash
-@item \0@var{nnn}
-the eight-bit character whose value is the octal value @var{nnn}
-(zero to three octal digits)
-@item \x@var{HH}
-the eight-bit character whose value is the hexadecimal value @var{HH}
-(one or two hex digits)
-@item \u@var{HHHH}
-the Unicode (ISO/IEC 10646) character whose value is the hexadecimal value
-@var{HHHH} (one to four hex digits)
-@item \U@var{HHHHHHHH}
-the Unicode (ISO/IEC 10646) character whose value is the hexadecimal value
-@var{HHHHHHHH} (one to eight hex digits)
-@end table
-
-@item enable
-@btindex enable
-@example
-enable [-a] [-dnps] [-f @var{filename}] [@var{name} @dots{}]
-@end example
-Enable and disable builtin shell commands.
-Disabling a builtin allows a disk command which has the same name
-as a shell builtin to be executed without specifying a full pathname,
-even though the shell normally searches for builtins before disk commands.
-If @option{-n} is used, the @var{name}s become disabled. Otherwise
-@var{name}s are enabled. For example, to use the @code{test} binary
-found via @env{$PATH} instead of the shell builtin version, type
-@samp{enable -n test}.
-
-If the @option{-p} option is supplied, or no @var{name} arguments appear,
-a list of shell builtins is printed. With no other arguments, the list
-consists of all enabled shell builtins.
-The @option{-a} option means to list
-each builtin with an indication of whether or not it is enabled.
-
-The @option{-f} option means to load the new builtin command @var{name}
-from shared object @var{filename}, on systems that support dynamic loading.
-The @option{-d} option will delete a builtin loaded with @option{-f}.
-
-If there are no options, a list of the shell builtins is displayed.
-The @option{-s} option restricts @code{enable} to the @sc{posix} special
-builtins. If @option{-s} is used with @option{-f}, the new builtin becomes
-a special builtin (@pxref{Special Builtins}).
-
-The return status is zero unless a @var{name} is not a shell builtin
-or there is an error loading a new builtin from a shared object.
-
-@item help
-@btindex help
-@example
-help [-dms] [@var{pattern}]
-@end example
-Display helpful information about builtin commands.
-If @var{pattern} is specified, @code{help} gives detailed help
-on all commands matching @var{pattern}, otherwise a list of
-the builtins is printed.
-
-Options, if supplied, have the following meanings:
-
-@table @code
-@item -d
-Display a short description of each @var{pattern}
-@item -m
-Display the description of each @var{pattern} in a manpage-like format
-@item -s
-Display only a short usage synopsis for each @var{pattern}
-@end table
-
-The return status is zero unless no command matches @var{pattern}.
-
-@item let
-@btindex let
-@example
-let @var{expression} [@var{expression}]
-@end example
-The @code{let} builtin allows arithmetic to be performed on shell
-variables. Each @var{expression} is evaluated according to the
-rules given below in @ref{Shell Arithmetic}. If the
-last @var{expression} evaluates to 0, @code{let} returns 1;
-otherwise 0 is returned.
-
-@item local
-@btindex local
-@example
-local [@var{option}] @var{name}[=@var{value}] @dots{}
-@end example
-For each argument, a local variable named @var{name} is created,
-and assigned @var{value}.
-The @var{option} can be any of the options accepted by @code{declare}.
-@code{local} can only be used within a function; it makes the variable
-@var{name} have a visible scope restricted to that function and its
-children. The return status is zero unless @code{local} is used outside
-a function, an invalid @var{name} is supplied, or @var{name} is a
-readonly variable.
-
-@item logout
-@btindex logout
-@example
-logout [@var{n}]
-@end example
-Exit a login shell, returning a status of @var{n} to the shell's
-parent.
-
-@item mapfile
-@btindex mapfile
-@example
-mapfile [-n @var{count}] [-O @var{origin}] [-s @var{count}] [-t] [-u @var{fd}] [
--C @var{callback}] [-c @var{quantum}] [@var{array}]
-@end example
-Read lines from the standard input into the indexed array variable @var{array},
-or from file descriptor @var{fd}
-if the @option{-u} option is supplied.
-The variable @code{MAPFILE} is the default @var{array}.
-Options, if supplied, have the following meanings:
-@table @code
-
-@item -n
-Copy at most @var{count} lines. If @var{count} is 0, all lines are copied.
-@item -O
-Begin assigning to @var{array} at index @var{origin}.
-The default index is 0.
-@item -s
-Discard the first @var{count} lines read.
-@item -t
-Remove a trailing newline from each line read.
-@item -u
-Read lines from file descriptor @var{fd} instead of the standard input.
-@item -C
-Evaluate @var{callback} each time @var{quantum}P lines are read.
-The @option{-c} option specifies @var{quantum}.
-@item -c
-Specify the number of lines read between each call to @var{callback}.
-@end table
-
-If @option{-C} is specified without @option{-c},
-the default quantum is 5000.
-When @var{callback} is evaluated, it is supplied the index of the next
-array element to be assigned and the line to be assigned to that element
-as additional arguments.
-@var{callback} is evaluated after the line is read but before the
-array element is assigned.
-
-If not supplied with an explicit origin, @code{mapfile} will clear @var{array}
-before assigning to it.
-
-@code{mapfile} returns successfully unless an invalid option or option
-argument is supplied, @var{array} is invalid or unassignable, or @var{array}
-is not an indexed array.
-
-@item printf
-@btindex printf
-@example
-printf [-v @var{var}] @var{format} [@var{arguments}]
-@end example
-Write the formatted @var{arguments} to the standard output under the
-control of the @var{format}.
-The @option{-v} option causes the output to be assigned to the variable
-@var{var} rather than being printed to the standard output.
-
-The @var{format} is a character string which contains three types of objects:
-plain characters, which are simply copied to standard output, character
-escape sequences, which are converted and copied to the standard output, and
-format specifications, each of which causes printing of the next successive
-@var{argument}.
-In addition to the standard @code{printf(1)} formats, @code{printf}
-interprets the following extensions:
-
-@table @code
-@item %b
-causes @code{printf} to expand backslash escape sequences in the
-corresponding @var{argument},
-(except that @samp{\c} terminates output, backslashes in
-@samp{\'}, @samp{\"}, and @samp{\?} are not removed, and octal escapes
-beginning with @samp{\0} may contain up to four digits).
-@item %q
-causes @code{printf} to output the
-corresponding @var{argument} in a format that can be reused as shell input.
-@item %(@var{datefmt})T
-causes @code{printf} to output the date-time string resulting from using
-@var{datefmt} as a format string for @code{strftime}(3). The corresponding
-@var{argument} is an integer representing the number of seconds since the
-epoch. Two special argument values may be used: -1 represents the current
-time, and -2 represents the time the shell was invoked.
-@end table
-
-@noindent
-Arguments to non-string format specifiers are treated as C language constants,
-except that a leading plus or minus sign is allowed, and if the leading
-character is a single or double quote, the value is the ASCII value of
-the following character.
-
-The @var{format} is reused as necessary to consume all of the @var{arguments}.
-If the @var{format} requires more @var{arguments} than are supplied, the
-extra format specifications behave as if a zero value or null string, as
-appropriate, had been supplied. The return value is zero on success,
-non-zero on failure.
-
-@item read
-@btindex read
-@example
-read [-ers] [-a @var{aname}] [-d @var{delim}] [-i @var{text}] [-n @var{nchars}] [-N @var{nchars}] [-p @var{prompt}] [-t @var{timeout}] [-u @var{fd}] [@var{name} @dots{}]
-@end example
-One line is read from the standard input, or from the file descriptor
-@var{fd} supplied as an argument to the @option{-u} option, and the first word
-is assigned to the first @var{name}, the second word to the second @var{name},
-and so on, with leftover words and their intervening separators assigned
-to the last @var{name}.
-If there are fewer words read from the input stream than names,
-the remaining names are assigned empty values.
-The characters in the value of the @env{IFS} variable
-are used to split the line into words.
-The backslash character @samp{\} may be used to remove any special
-meaning for the next character read and for line continuation.
-If no names are supplied, the line read is assigned to the
-variable @env{REPLY}.
-The return code is zero, unless end-of-file is encountered, @code{read}
-times out (in which case the return code is greater than 128), or an
-invalid file descriptor is supplied as the argument to @option{-u}.
-
-Options, if supplied, have the following meanings:
-
-@table @code
-@item -a @var{aname}
-The words are assigned to sequential indices of the array variable
-@var{aname}, starting at 0.
-All elements are removed from @var{aname} before the assignment.
-Other @var{name} arguments are ignored.
-
-@item -d @var{delim}
-The first character of @var{delim} is used to terminate the input line,
-rather than newline.
-
-@item -e
-Readline (@pxref{Command Line Editing}) is used to obtain the line.
-Readline uses the current (or default, if line editing was not previously
-active) editing settings.
-
-@item -i @var{text}
-If Readline is being used to read the line, @var{text} is placed into
-the editing buffer before editing begins.
-
-@item -n @var{nchars}
-@code{read} returns after reading @var{nchars} characters rather than
-waiting for a complete line of input, but honor a delimiter if fewer
-than @var{nchars} characters are read before the delimiter.
-
-@item -N @var{nchars}
-@code{read} returns after reading exactly @var{nchars} characters rather
-than waiting for a complete line of input, unless EOF is encountered or
-@code{read} times out.
-Delimiter characters encountered in the input are
-not treated specially and do not cause @code{read} to return until
-@var{nchars} characters are read.
-
-@item -p @var{prompt}
-Display @var{prompt}, without a trailing newline, before attempting
-to read any input.
-The prompt is displayed only if input is coming from a terminal.
-
-@item -r
-If this option is given, backslash does not act as an escape character.
-The backslash is considered to be part of the line.
-In particular, a backslash-newline pair may not be used as a line
-continuation.
-
-@item -s
-Silent mode. If input is coming from a terminal, characters are
-not echoed.
-
-@item -t @var{timeout}
-Cause @code{read} to time out and return failure if a complete line of
-input is not read within @var{timeout} seconds.
-@var{timeout} may be a decimal number with a fractional portion following
-the decimal point.
-This option is only effective if @code{read} is reading input from a
-terminal, pipe, or other special file; it has no effect when reading
-from regular files.
-If @var{timeout} is 0, @code{read} returns success if input is available on
-the specified file descriptor, failure otherwise.
-The exit status is greater than 128 if the timeout is exceeded.
-
-@item -u @var{fd}
-Read input from file descriptor @var{fd}.
-
-@end table
-
-@item readarray
-@btindex readarray
-@example
-readarray [-n @var{count}] [-O @var{origin}] [-s @var{count}] [-t] [-u @var{fd}] [
--C @var{callback}] [-c @var{quantum}] [@var{array}]
-@end example
-Read lines from the standard input into the indexed array variable @var{array},
-or from file descriptor @var{fd}
-if the @option{-u} option is supplied.
-
-A synonym for @code{mapfile}.
-
-@item source
-@btindex source
-@example
-source @var{filename}
-@end example
-A synonym for @code{.} (@pxref{Bourne Shell Builtins}).
-
-@item type
-@btindex type
-@example
-type [-afptP] [@var{name} @dots{}]
-@end example
-For each @var{name}, indicate how it would be interpreted if used as a
-command name.
-
-If the @option{-t} option is used, @code{type} prints a single word
-which is one of @samp{alias}, @samp{function}, @samp{builtin},
-@samp{file} or @samp{keyword},
-if @var{name} is an alias, shell function, shell builtin,
-disk file, or shell reserved word, respectively.
-If the @var{name} is not found, then nothing is printed, and
-@code{type} returns a failure status.
-
-If the @option{-p} option is used, @code{type} either returns the name
-of the disk file that would be executed, or nothing if @option{-t}
-would not return @samp{file}.
-
-The @option{-P} option forces a path search for each @var{name}, even if
-@option{-t} would not return @samp{file}.
-
-If a command is hashed, @option{-p} and @option{-P} print the hashed value,
-not necessarily the file that appears first in @code{$PATH}.
-
-If the @option{-a} option is used, @code{type} returns all of the places
-that contain an executable named @var{file}.
-This includes aliases and functions, if and only if the @option{-p} option
-is not also used.
-
-If the @option{-f} option is used, @code{type} does not attempt to find
-shell functions, as with the @code{command} builtin.
-
-The return status is zero if all of the @var{names} are found, non-zero
-if any are not found.
-
-@item typeset
-@btindex typeset
-@example
-typeset [-afFrxi] [-p] [@var{name}[=@var{value}] @dots{}]
-@end example
-The @code{typeset} command is supplied for compatibility with the Korn
-shell; however, it has been deprecated in favor of the @code{declare}
-builtin command.
-
-@item ulimit
-@btindex ulimit
-@example
-ulimit [-abcdefilmnpqrstuvxHST] [@var{limit}]
-@end example
-@code{ulimit} provides control over the resources available to processes
-started by the shell, on systems that allow such control. If an
-option is given, it is interpreted as follows:
-@table @code
-@item -S
-Change and report the soft limit associated with a resource.
-
-@item -H
-Change and report the hard limit associated with a resource.
-
-@item -a
-All current limits are reported.
-
-@item -b
-The maximum socket buffer size.
-
-@item -c
-The maximum size of core files created.
-
-@item -d
-The maximum size of a process's data segment.
-
-@item -e
-The maximum scheduling priority ("nice").
-
-@item -f
-The maximum size of files written by the shell and its children.
-
-@item -i
-The maximum number of pending signals.
-
-@item -l
-The maximum size that may be locked into memory.
-
-@item -m
-The maximum resident set size (many systems do not honor this limit).
-
-@item -n
-The maximum number of open file descriptors (most systems do not
-allow this value to be set).
-
-@item -p
-The pipe buffer size.
-
-@item -q
-The maximum number of bytes in POSIX message queues.
-
-@item -r
-The maximum real-time scheduling priority.
-
-@item -s
-The maximum stack size.
-
-@item -t
-The maximum amount of cpu time in seconds.
-
-@item -u
-The maximum number of processes available to a single user.
-
-@item -v
-The maximum amount of virtual memory available to the shell, and, on
-some systems, to its children.
-
-@item -x
-The maximum number of file locks.
-
-@item -T
-The maximum number of threads.
-
-@end table
-
-If @var{limit} is given, it is the new value of the specified resource;
-the special @var{limit} values @code{hard}, @code{soft}, and
-@code{unlimited} stand for the current hard limit, the current soft limit,
-and no limit, respectively.
-A hard limit cannot be increased by a non-root user once it is set;
-a soft limit may be increased up to the value of the hard limit.
-Otherwise, the current value of the soft limit for the specified resource
-is printed, unless the @option{-H} option is supplied.
-When setting new limits, if neither @option{-H} nor @option{-S} is supplied,
-both the hard and soft limits are set.
-If no option is given, then @option{-f} is assumed. Values are in 1024-byte
-increments, except for @option{-t}, which is in seconds, @option{-p},
-which is in units of 512-byte blocks, and @option{-n} and @option{-u}, which
-are unscaled values.
-
-The return status is zero unless an invalid option or argument is supplied,
-or an error occurs while setting a new limit.
-
-@item unalias
-@btindex unalias
-@example
-unalias [-a] [@var{name} @dots{} ]
-@end example
-
-Remove each @var{name} from the list of aliases. If @option{-a} is
-supplied, all aliases are removed.
-Aliases are described in @ref{Aliases}.
-
-@end table
-
-@node Modifying Shell Behavior
-@section Modifying Shell Behavior
-
-@menu
-* The Set Builtin:: Change the values of shell attributes and
- positional parameters.
-* The Shopt Builtin:: Modify shell optional behavior.
-@end menu
-
-@node The Set Builtin
-@subsection The Set Builtin
-
-This builtin is so complicated that it deserves its own section. @code{set}
-allows you to change the values of shell options and set the positional
-parameters, or to display the names and values of shell variables.
-
-@table @code
-@item set
-@btindex set
-@example
-set [--abefhkmnptuvxBCEHPT] [-o @var{option-name}] [@var{argument} @dots{}]
-set [+abefhkmnptuvxBCEHPT] [+o @var{option-name}] [@var{argument} @dots{}]
-@end example
-
-If no options or arguments are supplied, @code{set} displays the names
-and values of all shell variables and functions, sorted according to the
-current locale, in a format that may be reused as input
-for setting or resetting the currently-set variables.
-Read-only variables cannot be reset.
-In @sc{posix} mode, only shell variables are listed.
-
-When options are supplied, they set or unset shell attributes.
-Options, if specified, have the following meanings:
-
-@table @code
-@item -a
-Mark variables and function which are modified or created for export
-to the environment of subsequent commands.
-
-@item -b
-Cause the status of terminated background jobs to be reported
-immediately, rather than before printing the next primary prompt.
-
-@item -e
-Exit immediately if a pipeline (@pxref{Pipelines}), which may consist
-of a single simple command (@pxref{Simple Commands}),
-a subshell command enclosed in parentheses (@pxref{Command Grouping}),
-or one of the commands executed as part of a command list enclosed
-by braces (@pxref{Command Grouping})
-returns a non-zero status.
-The shell does not exit if the command that fails is part of the
-command list immediately following a @code{while} or @code{until} keyword,
-part of the test in an @code{if} statement,
-part of any command executed in a @code{&&} or @code{||} list except
-the command following the final @code{&&} or @code{||},
-any command in a pipeline but the last,
-or if the command's return status is being inverted with @code{!}.
-A trap on @code{ERR}, if set, is executed before the shell exits.
-
-This option applies to the shell environment and each subshell environment
-separately (@pxref{Command Execution Environment}), and may cause
-subshells to exit before executing all the commands in the subshell.
-
-@item -f
-Disable filename expansion (globbing).
-
-@item -h
-Locate and remember (hash) commands as they are looked up for execution.
-This option is enabled by default.
-
-@item -k
-All arguments in the form of assignment statements are placed
-in the environment for a command, not just those that precede
-the command name.
-
-@item -m
-Job control is enabled (@pxref{Job Control}).
-All processes run in a separate process group.
-When a background job completes, the shell prints a line
-containing its exit status.
-
-@item -n
-Read commands but do not execute them; this may be used to check a
-script for syntax errors.
-This option is ignored by interactive shells.
-
-@item -o @var{option-name}
-
-Set the option corresponding to @var{option-name}:
-
-@table @code
-@item allexport
-Same as @code{-a}.
-
-@item braceexpand
-Same as @code{-B}.
-
-@item emacs
-Use an @code{emacs}-style line editing interface (@pxref{Command Line Editing}).
-This also affects the editing interface used for @code{read -e}.
-
-@item errexit
-Same as @code{-e}.
-
-@item errtrace
-Same as @code{-E}.
-
-@item functrace
-Same as @code{-T}.
-
-@item hashall
-Same as @code{-h}.
-
-@item histexpand
-Same as @code{-H}.
-
-@item history
-Enable command history, as described in @ref{Bash History Facilities}.
-This option is on by default in interactive shells.
-
-@item ignoreeof
-An interactive shell will not exit upon reading EOF.
-
-@item keyword
-Same as @code{-k}.
-
-@item monitor
-Same as @code{-m}.
-
-@item noclobber
-Same as @code{-C}.
-
-@item noexec
-Same as @code{-n}.
-
-@item noglob
-Same as @code{-f}.
-
-@item nolog
-Currently ignored.
-
-@item notify
-Same as @code{-b}.
-
-@item nounset
-Same as @code{-u}.
-
-@item onecmd
-Same as @code{-t}.
-
-@item physical
-Same as @code{-P}.
-
-@item pipefail
-If set, the return value of a pipeline is the value of the last
-(rightmost) command to exit with a non-zero status, or zero if all
-commands in the pipeline exit successfully.
-This option is disabled by default.
-
-@item posix
-Change the behavior of Bash where the default operation differs
-from the @sc{posix} standard to match the standard
-(@pxref{Bash POSIX Mode}).
-This is intended to make Bash behave as a strict superset of that
-standard.
-
-@item privileged
-Same as @code{-p}.
-
-@item verbose
-Same as @code{-v}.
-
-@item vi
-Use a @code{vi}-style line editing interface.
-This also affects the editing interface used for @code{read -e}.
-
-@item xtrace
-Same as @code{-x}.
-@end table
-
-@item -p
-Turn on privileged mode.
-In this mode, the @env{$BASH_ENV} and @env{$ENV} files are not
-processed, shell functions are not inherited from the environment,
-and the @env{SHELLOPTS}, @env{BASHOPTS}, @env{CDPATH} and @env{GLOBIGNORE}
-variables, if they appear in the environment, are ignored.
-If the shell is started with the effective user (group) id not equal to the
-real user (group) id, and the @code{-p} option is not supplied, these actions
-are taken and the effective user id is set to the real user id.
-If the @code{-p} option is supplied at startup, the effective user id is
-not reset.
-Turning this option off causes the effective user
-and group ids to be set to the real user and group ids.
-
-@item -t
-Exit after reading and executing one command.
-
-@item -u
-Treat unset variables and parameters other than the special parameters
-@samp{@@} or @samp{*} as an error when performing parameter expansion.
-An error message will be written to the standard error, and a non-interactive
-shell will exit.
-
-@item -v
-Print shell input lines as they are read.
-
-@item -x
-Print a trace of simple commands, @code{for} commands, @code{case}
-commands, @code{select} commands, and arithmetic @code{for} commands
-and their arguments or associated word lists after they are
-expanded and before they are executed. The value of the @env{PS4}
-variable is expanded and the resultant value is printed before
-the command and its expanded arguments.
-
-@item -B
-The shell will perform brace expansion (@pxref{Brace Expansion}).
-This option is on by default.
-
-@item -C
-Prevent output redirection using @samp{>}, @samp{>&}, and @samp{<>}
-from overwriting existing files.
-
-@item -E
-If set, any trap on @code{ERR} is inherited by shell functions, command
-substitutions, and commands executed in a subshell environment.
-The @code{ERR} trap is normally not inherited in such cases.
-
-@item -H
-Enable @samp{!} style history substitution (@pxref{History Interaction}).
-This option is on by default for interactive shells.
-
-@item -P
-If set, do not follow symbolic links when performing commands such as
-@code{cd} which change the current directory. The physical directory
-is used instead. By default, Bash follows
-the logical chain of directories when performing commands
-which change the current directory.
-
-For example, if @file{/usr/sys} is a symbolic link to @file{/usr/local/sys}
-then:
-@example
-$ cd /usr/sys; echo $PWD
-/usr/sys
-$ cd ..; pwd
-/usr
-@end example
-
-@noindent
-If @code{set -P} is on, then:
-@example
-$ cd /usr/sys; echo $PWD
-/usr/local/sys
-$ cd ..; pwd
-/usr/local
-@end example
-
-@item -T
-If set, any trap on @code{DEBUG} and @code{RETURN} are inherited by
-shell functions, command substitutions, and commands executed
-in a subshell environment.
-The @code{DEBUG} and @code{RETURN} traps are normally not inherited
-in such cases.
-
-@item --
-If no arguments follow this option, then the positional parameters are
-unset. Otherwise, the positional parameters are set to the
-@var{arguments}, even if some of them begin with a @samp{-}.
-
-@item -
-Signal the end of options, cause all remaining @var{arguments}
-to be assigned to the positional parameters. The @option{-x}
-and @option{-v} options are turned off.
-If there are no arguments, the positional parameters remain unchanged.
-@end table
-
-Using @samp{+} rather than @samp{-} causes these options to be
-turned off. The options can also be used upon invocation of the
-shell. The current set of options may be found in @code{$-}.
-
-The remaining N @var{arguments} are positional parameters and are
-assigned, in order, to @code{$1}, @code{$2}, @dots{} @code{$N}.
-The special parameter @code{#} is set to N.
-
-The return status is always zero unless an invalid option is supplied.
-@end table
-
-@node The Shopt Builtin
-@subsection The Shopt Builtin
-
-This builtin allows you to change additional shell optional behavior.
-
-@table @code
-
-@item shopt
-@btindex shopt
-@example
-shopt [-pqsu] [-o] [@var{optname} @dots{}]
-@end example
-Toggle the values of variables controlling optional shell behavior.
-With no options, or with the @option{-p} option, a list of all settable
-options is displayed, with an indication of whether or not each is set.
-The @option{-p} option causes output to be displayed in a form that
-may be reused as input.
-Other options have the following meanings:
-
-@table @code
-@item -s
-Enable (set) each @var{optname}.
-
-@item -u
-Disable (unset) each @var{optname}.
-
-@item -q
-Suppresses normal output; the return status
-indicates whether the @var{optname} is set or unset.
-If multiple @var{optname} arguments are given with @option{-q},
-the return status is zero if all @var{optnames} are enabled;
-non-zero otherwise.
-
-@item -o
-Restricts the values of
-@var{optname} to be those defined for the @option{-o} option to the
-@code{set} builtin (@pxref{The Set Builtin}).
-@end table
-
-If either @option{-s} or @option{-u}
-is used with no @var{optname} arguments, the display is limited to
-those options which are set or unset, respectively.
-
-Unless otherwise noted, the @code{shopt} options are disabled (off)
-by default.
-
-The return status when listing options is zero if all @var{optnames}
-are enabled, non-zero otherwise. When setting or unsetting options,
-the return status is zero unless an @var{optname} is not a valid shell
-option.
-
-The list of @code{shopt} options is:
-@table @code
-
-@item autocd
-If set, a command name that is the name of a directory is executed as if
-it were the argument to the @code{cd} command.
-This option is only used by interactive shells.
-
-@item cdable_vars
-If this is set, an argument to the @code{cd} builtin command that
-is not a directory is assumed to be the name of a variable whose
-value is the directory to change to.
-
-@item cdspell
-If set, minor errors in the spelling of a directory component in a
-@code{cd} command will be corrected.
-The errors checked for are transposed characters,
-a missing character, and a character too many.
-If a correction is found, the corrected path is printed,
-and the command proceeds.
-This option is only used by interactive shells.
-
-@item checkhash
-If this is set, Bash checks that a command found in the hash
-table exists before trying to execute it. If a hashed command no
-longer exists, a normal path search is performed.
-
-@item checkjobs
-If set, Bash lists the status of any stopped and running jobs before
-exiting an interactive shell. If any jobs are running, this causes
-the exit to be deferred until a second exit is attempted without an
-intervening command (@pxref{Job Control}).
-The shell always postpones exiting if any jobs are stopped.
-
-@item checkwinsize
-If set, Bash checks the window size after each command when running
-interactively and, if necessary, updates the values of
-@env{LINES} and @env{COLUMNS}.
-
-@item cmdhist
-If set, Bash
-attempts to save all lines of a multiple-line
-command in the same history entry. This allows
-easy re-editing of multi-line commands.
-
-@item compat31
-If set, Bash
-changes its behavior to that of version 3.1 with respect to quoted
-arguments to the conditional command's @samp{=~} operator.
-
-@item compat32
-If set, Bash
-changes its behavior to that of version 3.2 with respect to locale-specific
-string comparison when using the @samp{[[}
-conditional command's @samp{<} and @samp{>} operators.
-Bash versions prior to bash-4.0 use ASCII collation and strcmp(3);
-bash-4.1 and later use the current locale's collation sequence and strcoll(3).
-
-@item compat40
-If set, Bash
-changes its behavior to that of version 4.0 with respect to locale-specific
-string comparison when using the @samp{[[}
-conditional command's @samp{<} and @samp{>} operators (see previous item)
-and the effect of interrupting a command list.
-
-@item compat41
-If set, Bash, when in posix mode, treats a single quote in a double-quoted
-parameter expansion as a special character. The single quotes must match
-(an even number) and the characters between the single quotes are considered
-quoted. This is the behavior of @sc{posix} mode through version 4.1.
-The default Bash behavior remains as in previous versions.
-
-@item dirspell
-If set, Bash
-attempts spelling correction on directory names during word completion
-if the directory name initially supplied does not exist.
-
-@item dotglob
-If set, Bash includes filenames beginning with a `.' in
-the results of filename expansion.
-
-@item execfail
-If this is set, a non-interactive shell will not exit if
-it cannot execute the file specified as an argument to the @code{exec}
-builtin command. An interactive shell does not exit if @code{exec}
-fails.
-
-@item expand_aliases
-If set, aliases are expanded as described below under Aliases,
-@ref{Aliases}.
-This option is enabled by default for interactive shells.
-
-@item extdebug
-If set, behavior intended for use by debuggers is enabled:
-
-@enumerate
-@item
-The @option{-F} option to the @code{declare} builtin (@pxref{Bash Builtins})
-displays the source file name and line number corresponding to each function
-name supplied as an argument.
-
-@item
-If the command run by the @code{DEBUG} trap returns a non-zero value, the
-next command is skipped and not executed.
-
-@item
-If the command run by the @code{DEBUG} trap returns a value of 2, and the
-shell is executing in a subroutine (a shell function or a shell script
-executed by the @code{.} or @code{source} builtins), a call to
-@code{return} is simulated.
-
-@item
-@code{BASH_ARGC} and @code{BASH_ARGV} are updated as described in their
-descriptions (@pxref{Bash Variables}).
-
-@item
-Function tracing is enabled: command substitution, shell functions, and
-subshells invoked with @code{( @var{command} )} inherit the
-@code{DEBUG} and @code{RETURN} traps.
-
-@item
-Error tracing is enabled: command substitution, shell functions, and
-subshells invoked with @code{( @var{command} )} inherit the
-@code{ERR} trap.
-@end enumerate
-
-@item extglob
-If set, the extended pattern matching features described above
-(@pxref{Pattern Matching}) are enabled.
-
-@item extquote
-If set, @code{$'@var{string}'} and @code{$"@var{string}"} quoting is
-performed within @code{$@{@var{parameter}@}} expansions
-enclosed in double quotes. This option is enabled by default.
-
-@item failglob
-If set, patterns which fail to match filenames during filename expansion
-result in an expansion error.
-
-@item force_fignore
-If set, the suffixes specified by the @env{FIGNORE} shell variable
-cause words to be ignored when performing word completion even if
-the ignored words are the only possible completions.
-@xref{Bash Variables}, for a description of @env{FIGNORE}.
-This option is enabled by default.
-
-@item globstar
-If set, the pattern @samp{**} used in a filename expansion context will
-match all files and zero or more directories and subdirectories.
-If the pattern is followed by a @samp{/}, only directories and
-subdirectories match.
-
-@item gnu_errfmt
-If set, shell error messages are written in the standard @sc{gnu} error
-message format.
-
-@item histappend
-If set, the history list is appended to the file named by the value
-of the @env{HISTFILE}
-variable when the shell exits, rather than overwriting the file.
-
-@item histreedit
-If set, and Readline
-is being used, a user is given the opportunity to re-edit a
-failed history substitution.
-
-@item histverify
-If set, and Readline
-is being used, the results of history substitution are not immediately
-passed to the shell parser. Instead, the resulting line is loaded into
-the Readline editing buffer, allowing further modification.
-
-@item hostcomplete
-If set, and Readline is being used, Bash will attempt to perform
-hostname completion when a word containing a @samp{@@} is being
-completed (@pxref{Commands For Completion}). This option is enabled
-by default.
-
-@item huponexit
-If set, Bash will send @code{SIGHUP} to all jobs when an interactive
-login shell exits (@pxref{Signals}).
-
-@item interactive_comments
-Allow a word beginning with @samp{#}
-to cause that word and all remaining characters on that
-line to be ignored in an interactive shell.
-This option is enabled by default.
-
-@item lastpipe
-If set, and job control is not active, the shell runs the last command of
-a pipeline not executed in the background in the current shell environment.
-
-@item lithist
-If enabled, and the @code{cmdhist}
-option is enabled, multi-line commands are saved to the history with
-embedded newlines rather than using semicolon separators where possible.
-
-@item login_shell
-The shell sets this option if it is started as a login shell
-(@pxref{Invoking Bash}).
-The value may not be changed.
-
-@item mailwarn
-If set, and a file that Bash is checking for mail has been
-accessed since the last time it was checked, the message
-@code{"The mail in @var{mailfile} has been read"} is displayed.
-
-@item no_empty_cmd_completion
-If set, and Readline is being used, Bash will not attempt to search
-the @env{PATH} for possible completions when completion is attempted
-on an empty line.
-
-@item nocaseglob
-If set, Bash matches filenames in a case-insensitive fashion when
-performing filename expansion.
-
-@item nocasematch
-If set, Bash matches patterns in a case-insensitive fashion when
-performing matching while executing @code{case} or @code{[[}
-conditional commands.
-
-@item nullglob
-If set, Bash allows filename patterns which match no
-files to expand to a null string, rather than themselves.
-
-@item progcomp
-If set, the programmable completion facilities
-(@pxref{Programmable Completion}) are enabled.
-This option is enabled by default.
-
-@item promptvars
-If set, prompt strings undergo
-parameter expansion, command substitution, arithmetic
-expansion, and quote removal after being expanded
-as described below (@pxref{Printing a Prompt}).
-This option is enabled by default.
-
-@item restricted_shell
-The shell sets this option if it is started in restricted mode
-(@pxref{The Restricted Shell}).
-The value may not be changed.
-This is not reset when the startup files are executed, allowing
-the startup files to discover whether or not a shell is restricted.
-
-@item shift_verbose
-If this is set, the @code{shift}
-builtin prints an error message when the shift count exceeds the
-number of positional parameters.
-
-@item sourcepath
-If set, the @code{source} builtin uses the value of @env{PATH}
-to find the directory containing the file supplied as an argument.
-This option is enabled by default.
-
-@item xpg_echo
-If set, the @code{echo} builtin expands backslash-escape sequences
-by default.
-
-@end table
-
-@noindent
-The return status when listing options is zero if all @var{optnames}
-are enabled, non-zero otherwise.
-When setting or unsetting options, the return status is zero unless an
-@var{optname} is not a valid shell option.
-
-@end table
-
-@node Special Builtins
-@section Special Builtins
-@cindex special builtin
-
-For historical reasons, the @sc{posix} standard has classified
-several builtin commands as @emph{special}.
-When Bash is executing in @sc{posix} mode, the special builtins
-differ from other builtin commands in three respects:
-
-@enumerate
-@item
-Special builtins are found before shell functions during command lookup.
-
-@item
-If a special builtin returns an error status, a non-interactive shell exits.
-
-@item
-Assignment statements preceding the command stay in effect in the shell
-environment after the command completes.
-@end enumerate
-
-When Bash is not executing in @sc{posix} mode, these builtins behave no
-differently than the rest of the Bash builtin commands.
-The Bash @sc{posix} mode is described in @ref{Bash POSIX Mode}.
-
-These are the @sc{posix} special builtins:
-@example
-@w{break : . continue eval exec exit export readonly return set}
-@w{shift trap unset}
-@end example
-
-@node Shell Variables
-@chapter Shell Variables
-
-@menu
-* Bourne Shell Variables:: Variables which Bash uses in the same way
- as the Bourne Shell.
-* Bash Variables:: List of variables that exist in Bash.
-@end menu
-
-This chapter describes the shell variables that Bash uses.
-Bash automatically assigns default values to a number of variables.
-
-@node Bourne Shell Variables
-@section Bourne Shell Variables
-
-Bash uses certain shell variables in the same way as the Bourne shell.
-In some cases, Bash assigns a default value to the variable.
-
-@vtable @code
-
-@item CDPATH
-A colon-separated list of directories used as a search path for
-the @code{cd} builtin command.
-
-@item HOME
-The current user's home directory; the default for the @code{cd} builtin
-command.
-The value of this variable is also used by tilde expansion
-(@pxref{Tilde Expansion}).
-
-@item IFS
-A list of characters that separate fields; used when the shell splits
-words as part of expansion.
-
-@item MAIL
-If this parameter is set to a filename or directory name
-and the @env{MAILPATH} variable
-is not set, Bash informs the user of the arrival of mail in
-the specified file or Maildir-format directory.
-
-@item MAILPATH
-A colon-separated list of filenames which the shell periodically checks
-for new mail.
-Each list entry can specify the message that is printed when new mail
-arrives in the mail file by separating the file name from the message with
-a @samp{?}.
-When used in the text of the message, @code{$_} expands to the name of
-the current mail file.
-
-@item OPTARG
-The value of the last option argument processed by the @code{getopts} builtin.
-
-@item OPTIND
-The index of the last option argument processed by the @code{getopts} builtin.
-
-@item PATH
-A colon-separated list of directories in which the shell looks for
-commands.
-A zero-length (null) directory name in the value of @code{PATH} indicates the
-current directory.
-A null directory name may appear as two adjacent colons, or as an initial
-or trailing colon.
-
-
-@item PS1
-The primary prompt string. The default value is @samp{\s-\v\$ }.
-@xref{Printing a Prompt}, for the complete list of escape
-sequences that are expanded before @env{PS1} is displayed.
-
-@item PS2
-The secondary prompt string. The default value is @samp{> }.
-
-@end vtable
-
-@node Bash Variables
-@section Bash Variables
-
-These variables are set or used by Bash, but other shells
-do not normally treat them specially.
-
-A few variables used by Bash are described in different chapters:
-variables for controlling the job control facilities
-(@pxref{Job Control Variables}).
-
-@vtable @code
-
-@item BASH
-The full pathname used to execute the current instance of Bash.
-
-@item BASHOPTS
-A colon-separated list of enabled shell options. Each word in
-the list is a valid argument for the @option{-s} option to the
-@code{shopt} builtin command (@pxref{The Shopt Builtin}).
-The options appearing in @env{BASHOPTS} are those reported
-as @samp{on} by @samp{shopt}.
-If this variable is in the environment when Bash
-starts up, each shell option in the list will be enabled before
-reading any startup files. This variable is readonly.
-
-@item BASHPID
-Expands to the process ID of the current Bash process.
-This differs from @code{$$} under certain circumstances, such as subshells
-that do not require Bash to be re-initialized.
-
-@item BASH_ALIASES
-An associative array variable whose members correspond to the internal
-list of aliases as maintained by the @code{alias} builtin.
-(@pxref{Bourne Shell Builtins}).
-Elements added to this array appear in the alias list; unsetting array
-elements cause aliases to be removed from the alias list.
-
-@item BASH_ARGC
-An array variable whose values are the number of parameters in each
-frame of the current bash execution call stack. The number of
-parameters to the current subroutine (shell function or script executed
-with @code{.} or @code{source}) is at the top of the stack. When a
-subroutine is executed, the number of parameters passed is pushed onto
-@code{BASH_ARGC}.
-The shell sets @code{BASH_ARGC} only when in extended debugging mode
-(see @ref{The Shopt Builtin}
-for a description of the @code{extdebug} option to the @code{shopt}
-builtin).
-
-@item BASH_ARGV
-An array variable containing all of the parameters in the current bash
-execution call stack. The final parameter of the last subroutine call
-is at the top of the stack; the first parameter of the initial call is
-at the bottom. When a subroutine is executed, the parameters supplied
-are pushed onto @code{BASH_ARGV}.
-The shell sets @code{BASH_ARGV} only when in extended debugging mode
-(see @ref{The Shopt Builtin}
-for a description of the @code{extdebug} option to the @code{shopt}
-builtin).
-
-@item BASH_CMDS
-An associative array variable whose members correspond to the internal
-hash table of commands as maintained by the @code{hash} builtin
-(@pxref{Bourne Shell Builtins}).
-Elements added to this array appear in the hash table; unsetting array
-elements cause commands to be removed from the hash table.
-
-@item BASH_COMMAND
-The command currently being executed or about to be executed, unless the
-shell is executing a command as the result of a trap,
-in which case it is the command executing at the time of the trap.
-
-@item BASH_ENV
-If this variable is set when Bash is invoked to execute a shell
-script, its value is expanded and used as the name of a startup file
-to read before executing the script. @xref{Bash Startup Files}.
-
-@item BASH_EXECUTION_STRING
-The command argument to the @option{-c} invocation option.
-
-@item BASH_LINENO
-An array variable whose members are the line numbers in source files
-where each corresponding member of @var{FUNCNAME} was invoked.
-@code{$@{BASH_LINENO[$i]@}} is the line number in the source file
-(@code{$@{BASH_SOURCE[$i+1]@}}) where
-@code{$@{FUNCNAME[$i]@}} was called (or @code{$@{BASH_LINENO[$i-1]@}} if
-referenced within another shell function).
-Use @code{LINENO} to obtain the current line number.
-
-@item BASH_REMATCH
-An array variable whose members are assigned by the @samp{=~} binary
-operator to the @code{[[} conditional command
-(@pxref{Conditional Constructs}).
-The element with index 0 is the portion of the string
-matching the entire regular expression.
-The element with index @var{n} is the portion of the
-string matching the @var{n}th parenthesized subexpression.
-This variable is read-only.
-
-@item BASH_SOURCE
-An array variable whose members are the source filenames where the
-corresponding shell function names in the @code{FUNCNAME} array
-variable are defined.
-The shell function @code{$@{FUNCNAME[$i]@}} is defined in the file
-@code{$@{BASH_SOURCE[$i]@}} and called from @code{$@{BASH_SOURCE[$i+1]@}}
-
-@item BASH_SUBSHELL
-Incremented by one within each subshell or subshell environment when
-the shell begins executing in that environment.
-The initial value is 0.
-
-@item BASH_VERSINFO
-A readonly array variable (@pxref{Arrays})
-whose members hold version information for this instance of Bash.
-The values assigned to the array members are as follows:
-
-@table @code
-
-@item BASH_VERSINFO[0]
-The major version number (the @var{release}).
-
-@item BASH_VERSINFO[1]
-The minor version number (the @var{version}).
-
-@item BASH_VERSINFO[2]
-The patch level.
-
-@item BASH_VERSINFO[3]
-The build version.
-
-@item BASH_VERSINFO[4]
-The release status (e.g., @var{beta1}).
-
-@item BASH_VERSINFO[5]
-The value of @env{MACHTYPE}.
-
-@end table
-
-@item BASH_VERSION
-The version number of the current instance of Bash.
-
-@item BASH_XTRACEFD
-If set to an integer corresponding to a valid file descriptor, Bash
-will write the trace output generated when @samp{set -x}
-is enabled to that file descriptor.
-This allows tracing output to be separated from diagnostic and error
-messages.
-The file descriptor is closed when @code{BASH_XTRACEFD} is unset or assigned
-a new value.
-Unsetting @code{BASH_XTRACEFD} or assigning it the empty string causes the
-trace output to be sent to the standard error.
-Note that setting @code{BASH_XTRACEFD} to 2 (the standard error file
-descriptor) and then unsetting it will result in the standard error
-being closed.
-
-@item COLUMNS
-Used by the @code{select} command to determine the terminal width
-when printing selection lists. Automatically set by an interactive shell
-upon receipt of a
-@code{SIGWINCH}.
-
-@item COMP_CWORD
-An index into @env{$@{COMP_WORDS@}} of the word containing the current
-cursor position.
-This variable is available only in shell functions invoked by the
-programmable completion facilities (@pxref{Programmable Completion}).
-
-@item COMP_LINE
-The current command line.
-This variable is available only in shell functions and external
-commands invoked by the
-programmable completion facilities (@pxref{Programmable Completion}).
-
-@item COMP_POINT
-The index of the current cursor position relative to the beginning of
-the current command.
-If the current cursor position is at the end of the current command,
-the value of this variable is equal to @code{$@{#COMP_LINE@}}.
-This variable is available only in shell functions and external
-commands invoked by the
-programmable completion facilities (@pxref{Programmable Completion}).
-
-@item COMP_TYPE
-Set to an integer value corresponding to the type of completion attempted
-that caused a completion function to be called:
-@var{TAB}, for normal completion,
-@samp{?}, for listing completions after successive tabs,
-@samp{!}, for listing alternatives on partial word completion,
-@samp{@@}, to list completions if the word is not unmodified,
-or
-@samp{%}, for menu completion.
-This variable is available only in shell functions and external
-commands invoked by the
-programmable completion facilities (@pxref{Programmable Completion}).
-
-@item COMP_KEY
-The key (or final key of a key sequence) used to invoke the current
-completion function.
-
-@item COMP_WORDBREAKS
-The set of characters that the Readline library treats as word
-separators when performing word completion.
-If @code{COMP_WORDBREAKS} is unset, it loses its special properties,
-even if it is subsequently reset.
-
-@item COMP_WORDS
-An array variable consisting of the individual
-words in the current command line.
-The line is split into words as Readline would split it, using
-@code{COMP_WORDBREAKS} as described above.
-This variable is available only in shell functions invoked by the
-programmable completion facilities (@pxref{Programmable Completion}).
-
-@item COMPREPLY
-An array variable from which Bash reads the possible completions
-generated by a shell function invoked by the programmable completion
-facility (@pxref{Programmable Completion}).
-
-@item COPROC
-An array variable created to hold the file descriptors
-for output from and input to an unnamed coprocess (@pxref{Coprocesses}).
-
-@item DIRSTACK
-An array variable containing the current contents of the directory stack.
-Directories appear in the stack in the order they are displayed by the
-@code{dirs} builtin.
-Assigning to members of this array variable may be used to modify
-directories already in the stack, but the @code{pushd} and @code{popd}
-builtins must be used to add and remove directories.
-Assignment to this variable will not change the current directory.
-If @env{DIRSTACK} is unset, it loses its special properties, even if
-it is subsequently reset.
-
-@item EMACS
-If Bash finds this variable in the environment when the shell
-starts with value @samp{t}, it assumes that the shell is running in an
-Emacs shell buffer and disables line editing.
-
-@item ENV
-Similar to @code{BASH_ENV}; used when the shell is invoked in
-@sc{posix} Mode (@pxref{Bash POSIX Mode}).
-
-@item EUID
-The numeric effective user id of the current user. This variable
-is readonly.
-
-@item FCEDIT
-The editor used as a default by the @option{-e} option to the @code{fc}
-builtin command.
-
-@item FIGNORE
-A colon-separated list of suffixes to ignore when performing
-filename completion.
-A file name whose suffix matches one of the entries in
-@env{FIGNORE}
-is excluded from the list of matched file names. A sample
-value is @samp{.o:~}
-
-@item FUNCNAME
-An array variable containing the names of all shell functions
-currently in the execution call stack.
-The element with index 0 is the name of any currently-executing
-shell function.
-The bottom-most element (the one with the highest index)
-is @code{"main"}.
-This variable exists only when a shell function is executing.
-Assignments to @env{FUNCNAME} have no effect and return an error status.
-If @env{FUNCNAME} is unset, it loses its special properties, even if
-it is subsequently reset.
-
-This variable can be used with @code{BASH_LINENO} and @code{BASH_SOURCE}.
-Each element of @code{FUNCNAME} has corresponding elements in
-@code{BASH_LINENO} and @code{BASH_SOURCE} to describe the call stack.
-For instance, @code{$@{FUNCNAME[$i]@}} was called from the file
-@code{$@{BASH_SOURCE[$i+1]@}} at line number @code{$@{BASH_LINENO[$i]@}}.
-The @code{caller} builtin displays the current call stack using this
-information.
-
-@item FUNCNEST
-If set to a numeric value greater than 0, defines a maximum function
-nesting level. Function invocations that exceed this nesting level
-will cause the current command to abort.
-
-@item GLOBIGNORE
-A colon-separated list of patterns defining the set of filenames to
-be ignored by filename expansion.
-If a filename matched by a filename expansion pattern also matches one
-of the patterns in @env{GLOBIGNORE}, it is removed from the list
-of matches.
-
-@item GROUPS
-An array variable containing the list of groups of which the current
-user is a member.
-Assignments to @env{GROUPS} have no effect and return an error status.
-If @env{GROUPS} is unset, it loses its special properties, even if it is
-subsequently reset.
-
-@item histchars
-Up to three characters which control history expansion, quick
-substitution, and tokenization (@pxref{History Interaction}).
-The first character is the
-@var{history expansion} character, that is, the character which signifies the
-start of a history expansion, normally @samp{!}. The second character is the
-character which signifies `quick substitution' when seen as the first
-character on a line, normally @samp{^}. The optional third character is the
-character which indicates that the remainder of the line is a comment when
-found as the first character of a word, usually @samp{#}. The history
-comment character causes history substitution to be skipped for the
-remaining words on the line. It does not necessarily cause the shell
-parser to treat the rest of the line as a comment.
-
-@item HISTCMD
-The history number, or index in the history list, of the current
-command. If @env{HISTCMD} is unset, it loses its special properties,
-even if it is subsequently reset.
-
-@item HISTCONTROL
-A colon-separated list of values controlling how commands are saved on
-the history list.
-If the list of values includes @samp{ignorespace}, lines which begin
-with a space character are not saved in the history list.
-A value of @samp{ignoredups} causes lines which match the previous
-history entry to not be saved.
-A value of @samp{ignoreboth} is shorthand for
-@samp{ignorespace} and @samp{ignoredups}.
-A value of @samp{erasedups} causes all previous lines matching the
-current line to be removed from the history list before that line
-is saved.
-Any value not in the above list is ignored.
-If @env{HISTCONTROL} is unset, or does not include a valid value,
-all lines read by the shell parser are saved on the history list,
-subject to the value of @env{HISTIGNORE}.
-The second and subsequent lines of a multi-line compound command are
-not tested, and are added to the history regardless of the value of
-@env{HISTCONTROL}.
-
-@item HISTFILE
-The name of the file to which the command history is saved. The
-default value is @file{~/.bash_history}.
-
-@item HISTFILESIZE
-The maximum number of lines contained in the history file. When this
-variable is assigned a value, the history file is truncated, if
-necessary, by removing the oldest entries,
-to contain no more than that number of lines.
-The history file is also truncated to this size after
-writing it when an interactive shell exits.
-The default value is 500.
-
-@item HISTIGNORE
-A colon-separated list of patterns used to decide which command
-lines should be saved on the history list. Each pattern is
-anchored at the beginning of the line and must match the complete
-line (no implicit @samp{*} is appended). Each pattern is tested
-against the line after the checks specified by @env{HISTCONTROL}
-are applied. In addition to the normal shell pattern matching
-characters, @samp{&} matches the previous history line. @samp{&}
-may be escaped using a backslash; the backslash is removed
-before attempting a match.
-The second and subsequent lines of a multi-line compound command are
-not tested, and are added to the history regardless of the value of
-@env{HISTIGNORE}.
-
-@env{HISTIGNORE} subsumes the function of @env{HISTCONTROL}. A
-pattern of @samp{&} is identical to @code{ignoredups}, and a
-pattern of @samp{[ ]*} is identical to @code{ignorespace}.
-Combining these two patterns, separating them with a colon,
-provides the functionality of @code{ignoreboth}.
-
-@item HISTSIZE
-The maximum number of commands to remember on the history list.
-The default value is 500.
-
-@item HISTTIMEFORMAT
-If this variable is set and not null, its value is used as a format string
-for @var{strftime} to print the time stamp associated with each history
-entry displayed by the @code{history} builtin.
-If this variable is set, time stamps are written to the history file so
-they may be preserved across shell sessions.
-This uses the history comment character to distinguish timestamps from
-other history lines.
-
-@item HOSTFILE
-Contains the name of a file in the same format as @file{/etc/hosts} that
-should be read when the shell needs to complete a hostname.
-The list of possible hostname completions may be changed while the shell
-is running;
-the next time hostname completion is attempted after the
-value is changed, Bash adds the contents of the new file to the
-existing list.
-If @env{HOSTFILE} is set, but has no value, or does not name a readable file,
-Bash attempts to read
-@file{/etc/hosts} to obtain the list of possible hostname completions.
-When @env{HOSTFILE} is unset, the hostname list is cleared.
-
-@item HOSTNAME
-The name of the current host.
-
-@item HOSTTYPE
-A string describing the machine Bash is running on.
-
-@item IGNOREEOF
-Controls the action of the shell on receipt of an @code{EOF} character
-as the sole input. If set, the value denotes the number
-of consecutive @code{EOF} characters that can be read as the
-first character on an input line
-before the shell will exit. If the variable exists but does not
-have a numeric value (or has no value) then the default is 10.
-If the variable does not exist, then @code{EOF} signifies the end of
-input to the shell. This is only in effect for interactive shells.
-
-@item INPUTRC
-The name of the Readline initialization file, overriding the default
-of @file{~/.inputrc}.
-
-@item LANG
-Used to determine the locale category for any category not specifically
-selected with a variable starting with @code{LC_}.
-
-@item LC_ALL
-This variable overrides the value of @env{LANG} and any other
-@code{LC_} variable specifying a locale category.
-
-@item LC_COLLATE
-This variable determines the collation order used when sorting the
-results of filename expansion, and
-determines the behavior of range expressions, equivalence classes,
-and collating sequences within filename expansion and pattern matching
-(@pxref{Filename Expansion}).
-
-@item LC_CTYPE
-This variable determines the interpretation of characters and the
-behavior of character classes within filename expansion and pattern
-matching (@pxref{Filename Expansion}).
-
-@item LC_MESSAGES
-This variable determines the locale used to translate double-quoted
-strings preceded by a @samp{$} (@pxref{Locale Translation}).
-
-@item LC_NUMERIC
-This variable determines the locale category used for number formatting.
-
-@item LINENO
-The line number in the script or shell function currently executing.
-
-@item LINES
-Used by the @code{select} command to determine the column length
-for printing selection lists. Automatically set by an interactive shell
-upon receipt of a
-@code{SIGWINCH}.
-
-@item MACHTYPE
-A string that fully describes the system type on which Bash
-is executing, in the standard @sc{gnu} @var{cpu-company-system} format.
-
-@item MAILCHECK
-How often (in seconds) that the shell should check for mail in the
-files specified in the @env{MAILPATH} or @env{MAIL} variables.
-The default is 60 seconds. When it is time to check
-for mail, the shell does so before displaying the primary prompt.
-If this variable is unset, or set to a value that is not a number
-greater than or equal to zero, the shell disables mail checking.
-
-@item MAPFILE
-An array variable created to hold the text read by the
-@code{mapfile} builtin when no variable name is supplied.
-
-@item OLDPWD
-The previous working directory as set by the @code{cd} builtin.
-
-@item OPTERR
-If set to the value 1, Bash displays error messages
-generated by the @code{getopts} builtin command.
-
-@item OSTYPE
-A string describing the operating system Bash is running on.
-
-@item PIPESTATUS
-An array variable (@pxref{Arrays})
-containing a list of exit status values from the processes
-in the most-recently-executed foreground pipeline (which may
-contain only a single command).
-
-@item POSIXLY_CORRECT
-If this variable is in the environment when @code{bash} starts, the shell
-enters @sc{posix} mode (@pxref{Bash POSIX Mode}) before reading the
-startup files, as if the @option{--posix} invocation option had been supplied.
-If it is set while the shell is running, @code{bash} enables @sc{posix} mode,
-as if the command
-@example
-@code{set -o posix}
-@end example
-@noindent
-had been executed.
-
-@item PPID
-The process @sc{id} of the shell's parent process. This variable
-is readonly.
-
-@item PROMPT_COMMAND
-If set, the value is interpreted as a command to execute
-before the printing of each primary prompt (@env{$PS1}).
-
-@item PROMPT_DIRTRIM
-If set to a number greater than zero, the value is used as the number of
-trailing directory components to retain when expanding the @code{\w} and
-@code{\W} prompt string escapes (@pxref{Printing a Prompt}).
-Characters removed are replaced with an ellipsis.
-
-@item PS3
-The value of this variable is used as the prompt for the
-@code{select} command. If this variable is not set, the
-@code{select} command prompts with @samp{#? }
-
-@item PS4
-The value is the prompt printed before the command line is echoed
-when the @option{-x} option is set (@pxref{The Set Builtin}).
-The first character of @env{PS4} is replicated multiple times, as
-necessary, to indicate multiple levels of indirection.
-The default is @samp{+ }.
-
-@item PWD
-The current working directory as set by the @code{cd} builtin.
-
-@item RANDOM
-Each time this parameter is referenced, a random integer
-between 0 and 32767 is generated. Assigning a value to this
-variable seeds the random number generator.
-
-@item READLINE_LINE
-The contents of the Readline line buffer, for use
-with @samp{bind -x} (@pxref{Bash Builtins}).
-
-@item READLINE_POINT
-The position of the insertion point in the Readline line buffer, for use
-with @samp{bind -x} (@pxref{Bash Builtins}).
-
-@item REPLY
-The default variable for the @code{read} builtin.
-
-@item SECONDS
-This variable expands to the number of seconds since the
-shell was started. Assignment to this variable resets
-the count to the value assigned, and the expanded value
-becomes the value assigned plus the number of seconds
-since the assignment.
-
-@item SHELL
-The full pathname to the shell is kept in this environment variable.
-If it is not set when the shell starts,
-Bash assigns to it the full pathname of the current user's login shell.
-
-@item SHELLOPTS
-A colon-separated list of enabled shell options. Each word in
-the list is a valid argument for the @option{-o} option to the
-@code{set} builtin command (@pxref{The Set Builtin}).
-The options appearing in @env{SHELLOPTS} are those reported
-as @samp{on} by @samp{set -o}.
-If this variable is in the environment when Bash
-starts up, each shell option in the list will be enabled before
-reading any startup files. This variable is readonly.
-
-@item SHLVL
-Incremented by one each time a new instance of Bash is started. This is
-intended to be a count of how deeply your Bash shells are nested.
-
-@item TIMEFORMAT
-The value of this parameter is used as a format string specifying
-how the timing information for pipelines prefixed with the @code{time}
-reserved word should be displayed.
-The @samp{%} character introduces an
-escape sequence that is expanded to a time value or other
-information.
-The escape sequences and their meanings are as
-follows; the braces denote optional portions.
-
-@table @code
-
-@item %%
-A literal @samp{%}.
-
-@item %[@var{p}][l]R
-The elapsed time in seconds.
-
-@item %[@var{p}][l]U
-The number of CPU seconds spent in user mode.
-
-@item %[@var{p}][l]S
-The number of CPU seconds spent in system mode.
-
-@item %P
-The CPU percentage, computed as (%U + %S) / %R.
-@end table
-
-The optional @var{p} is a digit specifying the precision, the number of
-fractional digits after a decimal point.
-A value of 0 causes no decimal point or fraction to be output.
-At most three places after the decimal point may be specified; values
-of @var{p} greater than 3 are changed to 3.
-If @var{p} is not specified, the value 3 is used.
-
-The optional @code{l} specifies a longer format, including minutes, of
-the form @var{MM}m@var{SS}.@var{FF}s.
-The value of @var{p} determines whether or not the fraction is included.
-
-If this variable is not set, Bash acts as if it had the value
-@example
-@code{$'\nreal\t%3lR\nuser\t%3lU\nsys\t%3lS'}
-@end example
-If the value is null, no timing information is displayed.
-A trailing newline is added when the format string is displayed.
-
-@item TMOUT
-If set to a value greater than zero, @code{TMOUT} is treated as the
-default timeout for the @code{read} builtin (@pxref{Bash Builtins}).
-The @code{select} command (@pxref{Conditional Constructs}) terminates
-if input does not arrive after @code{TMOUT} seconds when input is coming
-from a terminal.
-
-In an interactive shell, the value is interpreted as
-the number of seconds to wait for input after issuing the primary
-prompt when the shell is interactive.
-Bash terminates after that number of seconds if input does
-not arrive.
-
-@item TMPDIR
-If set, Bash uses its value as the name of a directory in which
-Bash creates temporary files for the shell's use.
-
-@item UID
-The numeric real user id of the current user. This variable is readonly.
-
-@end vtable
-
-@node Bash Features
-@chapter Bash Features
-
-This section describes features unique to Bash.
-
-@menu
-* Invoking Bash:: Command line options that you can give
- to Bash.
-* Bash Startup Files:: When and how Bash executes scripts.
-* Interactive Shells:: What an interactive shell is.
-* Bash Conditional Expressions:: Primitives used in composing expressions for
- the @code{test} builtin.
-* Shell Arithmetic:: Arithmetic on shell variables.
-* Aliases:: Substituting one command for another.
-* Arrays:: Array Variables.
-* The Directory Stack:: History of visited directories.
-* Printing a Prompt:: Controlling the PS1 string.
-* The Restricted Shell:: A more controlled mode of shell execution.
-* Bash POSIX Mode:: Making Bash behave more closely to what
- the POSIX standard specifies.
-@end menu
-
-@node Invoking Bash
-@section Invoking Bash
-
-@example
-bash [long-opt] [-ir] [-abefhkmnptuvxdBCDHP] [-o @var{option}] [-O @var{shopt_option}] [@var{argument} @dots{}]
-bash [long-opt] [-abefhkmnptuvxdBCDHP] [-o @var{option}] [-O @var{shopt_option}] -c @var{string} [@var{argument} @dots{}]
-bash [long-opt] -s [-abefhkmnptuvxdBCDHP] [-o @var{option}] [-O @var{shopt_option}] [@var{argument} @dots{}]
-@end example
-
-All of the single-character options used with the @code{set} builtin
-(@pxref{The Set Builtin}) can be used as options when the shell is invoked.
-In addition, there are several multi-character
-options that you can use. These options must appear on the command
-line before the single-character options to be recognized.
-
-@table @code
-@item --debugger
-Arrange for the debugger profile to be executed before the shell
-starts. Turns on extended debugging mode (see @ref{The Shopt Builtin}
-for a description of the @code{extdebug} option to the @code{shopt}
-builtin).
-
-@item --dump-po-strings
-A list of all double-quoted strings preceded by @samp{$}
-is printed on the standard output
-in the @sc{gnu} @code{gettext} PO (portable object) file format.
-Equivalent to @option{-D} except for the output format.
-
-@item --dump-strings
-Equivalent to @option{-D}.
-
-@item --help
-Display a usage message on standard output and exit successfully.
-
-@item --init-file @var{filename}
-@itemx --rcfile @var{filename}
-Execute commands from @var{filename} (instead of @file{~/.bashrc})
-in an interactive shell.
-
-@item --login
-Equivalent to @option{-l}.
-
-@item --noediting
-Do not use the @sc{gnu} Readline library (@pxref{Command Line Editing})
-to read command lines when the shell is interactive.
-
-@item --noprofile
-Don't load the system-wide startup file @file{/etc/profile}
-or any of the personal initialization files
-@file{~/.bash_profile}, @file{~/.bash_login}, or @file{~/.profile}
-when Bash is invoked as a login shell.
-
-@item --norc
-Don't read the @file{~/.bashrc} initialization file in an
-interactive shell. This is on by default if the shell is
-invoked as @code{sh}.
-
-@item --posix
-Change the behavior of Bash where the default operation differs
-from the @sc{posix} standard to match the standard. This
-is intended to make Bash behave as a strict superset of that
-standard. @xref{Bash POSIX Mode}, for a description of the Bash
-@sc{posix} mode.
-
-@item --restricted
-Make the shell a restricted shell (@pxref{The Restricted Shell}).
-
-@item --verbose
-Equivalent to @option{-v}. Print shell input lines as they're read.
-
-@item --version
-Show version information for this instance of
-Bash on the standard output and exit successfully.
-
-@end table
-
-There are several single-character options that may be supplied at
-invocation which are not available with the @code{set} builtin.
-
-@table @code
-@item -c @var{string}
-Read and execute commands from @var{string} after processing the
-options, then exit. Any remaining arguments are assigned to the
-positional parameters, starting with @code{$0}.
-
-@item -i
-Force the shell to run interactively. Interactive shells are
-described in @ref{Interactive Shells}.
-
-@item -l
-Make this shell act as if it had been directly invoked by login.
-When the shell is interactive, this is equivalent to starting a
-login shell with @samp{exec -l bash}.
-When the shell is not interactive, the login shell startup files will
-be executed.
-@samp{exec bash -l} or @samp{exec bash --login}
-will replace the current shell with a Bash login shell.
-@xref{Bash Startup Files}, for a description of the special behavior
-of a login shell.
-
-@item -r
-Make the shell a restricted shell (@pxref{The Restricted Shell}).
-
-@item -s
-If this option is present, or if no arguments remain after option
-processing, then commands are read from the standard input.
-This option allows the positional parameters to be set
-when invoking an interactive shell.
-
-@item -D
-A list of all double-quoted strings preceded by @samp{$}
-is printed on the standard output.
-These are the strings that
-are subject to language translation when the current locale
-is not @code{C} or @code{POSIX} (@pxref{Locale Translation}).
-This implies the @option{-n} option; no commands will be executed.
-
-@item [-+]O [@var{shopt_option}]
-@var{shopt_option} is one of the shell options accepted by the
-@code{shopt} builtin (@pxref{The Shopt Builtin}).
-If @var{shopt_option} is present, @option{-O} sets the value of that option;
-@option{+O} unsets it.
-If @var{shopt_option} is not supplied, the names and values of the shell
-options accepted by @code{shopt} are printed on the standard output.
-If the invocation option is @option{+O}, the output is displayed in a format
-that may be reused as input.
-
-@item --
-A @code{--} signals the end of options and disables further option
-processing.
-Any arguments after the @code{--} are treated as filenames and arguments.
-
-@end table
-
-@cindex login shell
-A @emph{login} shell is one whose first character of argument zero is
-@samp{-}, or one invoked with the @option{--login} option.
-
-@cindex interactive shell
-An @emph{interactive} shell is one started without non-option arguments,
-unless @option{-s} is specified,
-without specifying the @option{-c} option, and whose input and output are both
-connected to terminals (as determined by @code{isatty(3)}), or one
-started with the @option{-i} option. @xref{Interactive Shells}, for more
-information.
-
-If arguments remain after option processing, and neither the
-@option{-c} nor the @option{-s}
-option has been supplied, the first argument is assumed to
-be the name of a file containing shell commands (@pxref{Shell Scripts}).
-When Bash is invoked in this fashion, @code{$0}
-is set to the name of the file, and the positional parameters
-are set to the remaining arguments.
-Bash reads and executes commands from this file, then exits.
-Bash's exit status is the exit status of the last command executed
-in the script. If no commands are executed, the exit status is 0.
-
-@node Bash Startup Files
-@section Bash Startup Files
-@cindex startup files
-
-This section describes how Bash executes its startup files.
-If any of the files exist but cannot be read, Bash reports an error.
-Tildes are expanded in file names as described above under
-Tilde Expansion (@pxref{Tilde Expansion}).
-
-Interactive shells are described in @ref{Interactive Shells}.
-
-@subsubheading Invoked as an interactive login shell, or with @option{--login}
-
-When Bash is invoked as an interactive login shell, or as a
-non-interactive shell with the @option{--login} option, it first reads and
-executes commands from the file @file{/etc/profile}, if that file exists.
-After reading that file, it looks for @file{~/.bash_profile},
-@file{~/.bash_login}, and @file{~/.profile}, in that order, and reads
-and executes commands from the first one that exists and is readable.
-The @option{--noprofile} option may be used when the shell is started to
-inhibit this behavior.
-
-When a login shell exits, Bash reads and executes commands from
-the file @file{~/.bash_logout}, if it exists.
-
-@subsubheading Invoked as an interactive non-login shell
-
-When an interactive shell that is not a login shell is started, Bash
-reads and executes commands from @file{~/.bashrc}, if that file exists.
-This may be inhibited by using the @option{--norc} option.
-The @option{--rcfile @var{file}} option will force Bash to read and
-execute commands from @var{file} instead of @file{~/.bashrc}.
-
-So, typically, your @file{~/.bash_profile} contains the line
-@example
-@code{if [ -f ~/.bashrc ]; then . ~/.bashrc; fi}
-@end example
-@noindent
-after (or before) any login-specific initializations.
-
-@subsubheading Invoked non-interactively
-
-When Bash is started non-interactively, to run a shell script,
-for example, it looks for the variable @env{BASH_ENV} in the environment,
-expands its value if it appears there, and uses the expanded value as
-the name of a file to read and execute. Bash behaves as if the
-following command were executed:
-@example
-@code{if [ -n "$BASH_ENV" ]; then . "$BASH_ENV"; fi}
-@end example
-@noindent
-but the value of the @env{PATH} variable is not used to search for the
-file name.
-
-As noted above, if a non-interactive shell is invoked with the
-@option{--login} option, Bash attempts to read and execute commands from the
-login shell startup files.
-
-@subsubheading Invoked with name @code{sh}
-
-If Bash is invoked with the name @code{sh}, it tries to mimic the
-startup behavior of historical versions of @code{sh} as closely as
-possible, while conforming to the @sc{posix} standard as well.
-
-When invoked as an interactive login shell, or as a non-interactive
-shell with the @option{--login} option, it first attempts to read
-and execute commands from @file{/etc/profile} and @file{~/.profile}, in
-that order.
-The @option{--noprofile} option may be used to inhibit this behavior.
-When invoked as an interactive shell with the name @code{sh}, Bash
-looks for the variable @env{ENV}, expands its value if it is defined,
-and uses the expanded value as the name of a file to read and execute.
-Since a shell invoked as @code{sh} does not attempt to read and execute
-commands from any other startup files, the @option{--rcfile} option has
-no effect.
-A non-interactive shell invoked with the name @code{sh} does not attempt
-to read any other startup files.
-
-When invoked as @code{sh}, Bash enters @sc{posix} mode after
-the startup files are read.
-
-@subsubheading Invoked in @sc{posix} mode
-
-When Bash is started in @sc{posix} mode, as with the
-@option{--posix} command line option, it follows the @sc{posix} standard
-for startup files.
-In this mode, interactive shells expand the @env{ENV} variable
-and commands are read and executed from the file whose name is the
-expanded value.
-No other startup files are read.
-
-@subsubheading Invoked by remote shell daemon
-
-Bash attempts to determine when it is being run with its standard input
-connected to a network connection, as when executed by the remote shell
-daemon, usually @code{rshd}, or the secure shell daemon @code{sshd}.
-If Bash determines it is being run in
-this fashion, it reads and executes commands from @file{~/.bashrc}, if that
-file exists and is readable.
-It will not do this if invoked as @code{sh}.
-The @option{--norc} option may be used to inhibit this behavior, and the
-@option{--rcfile} option may be used to force another file to be read, but
-@code{rshd} does not generally invoke the shell with those options or
-allow them to be specified.
-
-@subsubheading Invoked with unequal effective and real @sc{uid/gid}s
-
-If Bash is started with the effective user (group) id not equal to the
-real user (group) id, and the @code{-p} option is not supplied, no startup
-files are read, shell functions are not inherited from the environment,
-the @env{SHELLOPTS}, @env{BASHOPTS}, @env{CDPATH}, and @env{GLOBIGNORE}
-variables, if they appear in the environment, are ignored, and the effective
-user id is set to the real user id.
-If the @code{-p} option is supplied at invocation, the startup behavior is
-the same, but the effective user id is not reset.
-
-@node Interactive Shells
-@section Interactive Shells
-@cindex interactive shell
-@cindex shell, interactive
-
-@menu
-* What is an Interactive Shell?:: What determines whether a shell is Interactive.
-* Is this Shell Interactive?:: How to tell if a shell is interactive.
-* Interactive Shell Behavior:: What changes in a interactive shell?
-@end menu
-
-@node What is an Interactive Shell?
-@subsection What is an Interactive Shell?
-
-An interactive shell
-is one started without non-option arguments, unless @option{-s} is
-specified, without specifying the @option{-c} option, and
-whose input and error output are both
-connected to terminals (as determined by @code{isatty(3)}),
-or one started with the @option{-i} option.
-
-An interactive shell generally reads from and writes to a user's
-terminal.
-
-The @option{-s} invocation option may be used to set the positional parameters
-when an interactive shell is started.
-
-@node Is this Shell Interactive?
-@subsection Is this Shell Interactive?
-
-To determine within a startup script whether or not Bash is
-running interactively,
-test the value of the @samp{-} special parameter.
-It contains @code{i} when the shell is interactive. For example:
-
-@example
-case "$-" in
-*i*) echo This shell is interactive ;;
-*) echo This shell is not interactive ;;
-esac
-@end example
-
-Alternatively, startup scripts may examine the variable
-@env{PS1}; it is unset in non-interactive shells, and set in
-interactive shells. Thus:
-
-@example
-if [ -z "$PS1" ]; then
- echo This shell is not interactive
-else
- echo This shell is interactive
-fi
-@end example
-
-@node Interactive Shell Behavior
-@subsection Interactive Shell Behavior
-
-When the shell is running interactively, it changes its behavior in
-several ways.
-
-@enumerate
-@item
-Startup files are read and executed as described in @ref{Bash Startup Files}.
-
-@item
-Job Control (@pxref{Job Control}) is enabled by default. When job
-control is in effect, Bash ignores the keyboard-generated job control
-signals @code{SIGTTIN}, @code{SIGTTOU}, and @code{SIGTSTP}.
-
-@item
-Bash expands and displays @env{PS1} before reading the first line
-of a command, and expands and displays @env{PS2} before reading the
-second and subsequent lines of a multi-line command.
-
-@item
-Bash executes the value of the @env{PROMPT_COMMAND} variable as a command
-before printing the primary prompt, @env{$PS1}
-(@pxref{Bash Variables}).
-
-@item
-Readline (@pxref{Command Line Editing}) is used to read commands from
-the user's terminal.
-
-@item
-Bash inspects the value of the @code{ignoreeof} option to @code{set -o}
-instead of exiting immediately when it receives an @code{EOF} on its
-standard input when reading a command (@pxref{The Set Builtin}).
-
-@item
-Command history (@pxref{Bash History Facilities})
-and history expansion (@pxref{History Interaction})
-are enabled by default.
-Bash will save the command history to the file named by @env{$HISTFILE}
-when an interactive shell exits.
-
-@item
-Alias expansion (@pxref{Aliases}) is performed by default.
-
-@item
-In the absence of any traps, Bash ignores @code{SIGTERM}
-(@pxref{Signals}).
-
-@item
-In the absence of any traps, @code{SIGINT} is caught and handled
-((@pxref{Signals}).
-@code{SIGINT} will interrupt some shell builtins.
-
-@item
-An interactive login shell sends a @code{SIGHUP} to all jobs on exit
-if the @code{huponexit} shell option has been enabled (@pxref{Signals}).
-
-@item
-The @option{-n} invocation option is ignored, and @samp{set -n} has
-no effect (@pxref{The Set Builtin}).
-
-@item
-Bash will check for mail periodically, depending on the values of the
-@env{MAIL}, @env{MAILPATH}, and @env{MAILCHECK} shell variables
-(@pxref{Bash Variables}).
-
-@item
-Expansion errors due to references to unbound shell variables after
-@samp{set -u} has been enabled will not cause the shell to exit
-(@pxref{The Set Builtin}).
-
-@item
-The shell will not exit on expansion errors caused by @var{var} being unset
-or null in @code{$@{@var{var}:?@var{word}@}} expansions
-(@pxref{Shell Parameter Expansion}).
-
-@item
-Redirection errors encountered by shell builtins will not cause the
-shell to exit.
-
-@item
-When running in @sc{posix} mode, a special builtin returning an error
-status will not cause the shell to exit (@pxref{Bash POSIX Mode}).
-
-@item
-A failed @code{exec} will not cause the shell to exit
-(@pxref{Bourne Shell Builtins}).
-
-@item
-Parser syntax errors will not cause the shell to exit.
-
-@item
-Simple spelling correction for directory arguments to the @code{cd}
-builtin is enabled by default (see the description of the @code{cdspell}
-option to the @code{shopt} builtin in @ref{The Shopt Builtin}).
-
-@item
-The shell will check the value of the @env{TMOUT} variable and exit
-if a command is not read within the specified number of seconds after
-printing @env{$PS1} (@pxref{Bash Variables}).
-
-@end enumerate
-
-@node Bash Conditional Expressions
-@section Bash Conditional Expressions
-@cindex expressions, conditional
-
-Conditional expressions are used by the @code{[[} compound command
-and the @code{test} and @code{[} builtin commands.
-
-Expressions may be unary or binary.
-Unary expressions are often used to examine the status of a file.
-There are string operators and numeric comparison operators as well.
-If the @var{file} argument to one of the primaries is of the form
-@file{/dev/fd/@var{N}}, then file descriptor @var{N} is checked.
-If the @var{file} argument to one of the primaries is one of
-@file{/dev/stdin}, @file{/dev/stdout}, or @file{/dev/stderr}, file
-descriptor 0, 1, or 2, respectively, is checked.
-
-When used with @samp{[[}, the @samp{<} and @samp{>} operators sort
-lexicographically using the current locale.
-The @code{test} command uses ASCII ordering.
-
-Unless otherwise specified, primaries that operate on files follow symbolic
-links and operate on the target of the link, rather than the link itself.
-
-@table @code
-@item -a @var{file}
-True if @var{file} exists.
-
-@item -b @var{file}
-True if @var{file} exists and is a block special file.
-
-@item -c @var{file}
-True if @var{file} exists and is a character special file.
-
-@item -d @var{file}
-True if @var{file} exists and is a directory.
-
-@item -e @var{file}
-True if @var{file} exists.
-
-@item -f @var{file}
-True if @var{file} exists and is a regular file.
-
-@item -g @var{file}
-True if @var{file} exists and its set-group-id bit is set.
-
-@item -h @var{file}
-True if @var{file} exists and is a symbolic link.
-
-@item -k @var{file}
-True if @var{file} exists and its "sticky" bit is set.
-
-@item -p @var{file}
-True if @var{file} exists and is a named pipe (FIFO).
-
-@item -r @var{file}
-True if @var{file} exists and is readable.
-
-@item -s @var{file}
-True if @var{file} exists and has a size greater than zero.
-
-@item -t @var{fd}
-True if file descriptor @var{fd} is open and refers to a terminal.
-
-@item -u @var{file}
-True if @var{file} exists and its set-user-id bit is set.
-
-@item -w @var{file}
-True if @var{file} exists and is writable.
-
-@item -x @var{file}
-True if @var{file} exists and is executable.
-
-@item -G @var{file}
-True if @var{file} exists and is owned by the effective group id.
-
-@item -L @var{file}
-True if @var{file} exists and is a symbolic link.
-
-@item -N @var{file}
-True if @var{file} exists and has been modified since it was last read.
-
-@item -O @var{file}
-True if @var{file} exists and is owned by the effective user id.
-
-@item -S @var{file}
-True if @var{file} exists and is a socket.
-
-@item @var{file1} -ef @var{file2}
-True if @var{file1} and @var{file2} refer to the same device and
-inode numbers.
-
-@item @var{file1} -nt @var{file2}
-True if @var{file1} is newer (according to modification date)
-than @var{file2}, or if @var{file1} exists and @var{file2} does not.
-
-@item @var{file1} -ot @var{file2}
-True if @var{file1} is older than @var{file2},
-or if @var{file2} exists and @var{file1} does not.
-
-@item -o @var{optname}
-True if the shell option @var{optname} is enabled.
-The list of options appears in the description of the @option{-o}
-option to the @code{set} builtin (@pxref{The Set Builtin}).
-
-@item -v @var{varname}
-True if the shell variable @var{varname} is set (has been assigned a value).
-
-@item -z @var{string}
-True if the length of @var{string} is zero.
-
-@item -n @var{string}
-@itemx @var{string}
-True if the length of @var{string} is non-zero.
-
-@item @var{string1} == @var{string2}
-@itemx @var{string1} = @var{string2}
-True if the strings are equal.
-@samp{=} should be used with the @code{test} command for @sc{posix} conformance.
-
-@item @var{string1} != @var{string2}
-True if the strings are not equal.
-
-@item @var{string1} < @var{string2}
-True if @var{string1} sorts before @var{string2} lexicographically.
-
-@item @var{string1} > @var{string2}
-True if @var{string1} sorts after @var{string2} lexicographically.
-
-@item @var{arg1} OP @var{arg2}
-@code{OP} is one of
-@samp{-eq}, @samp{-ne}, @samp{-lt}, @samp{-le}, @samp{-gt}, or @samp{-ge}.
-These arithmetic binary operators return true if @var{arg1}
-is equal to, not equal to, less than, less than or equal to,
-greater than, or greater than or equal to @var{arg2},
-respectively. @var{Arg1} and @var{arg2}
-may be positive or negative integers.
-
-@end table
-
-@node Shell Arithmetic
-@section Shell Arithmetic
-@cindex arithmetic, shell
-@cindex shell arithmetic
-@cindex expressions, arithmetic
-@cindex evaluation, arithmetic
-@cindex arithmetic evaluation
-
-The shell allows arithmetic expressions to be evaluated, as one of
-the shell expansions or by the @code{let} and the @option{-i} option
-to the @code{declare} builtins.
-
-Evaluation is done in fixed-width integers with no check for overflow,
-though division by 0 is trapped and flagged as an error.
-The operators and their precedence, associativity, and values
-are the same as in the C language.
-The following list of operators is grouped into levels of
-equal-precedence operators.
-The levels are listed in order of decreasing precedence.
-
-@table @code
-
-@item @var{id}++ @var{id}--
-variable post-increment and post-decrement
-
-@item ++@var{id} --@var{id}
-variable pre-increment and pre-decrement
-
-@item - +
-unary minus and plus
-
-@item ! ~
-logical and bitwise negation
-
-@item **
-exponentiation
-
-@item * / %
-multiplication, division, remainder
-
-@item + -
-addition, subtraction
-
-@item << >>
-left and right bitwise shifts
-
-@item <= >= < >
-comparison
-
-@item == !=
-equality and inequality
-
-@item &
-bitwise AND
-
-@item ^
-bitwise exclusive OR
-
-@item |
-bitwise OR
-
-@item &&
-logical AND
-
-@item ||
-logical OR
-
-@item expr ? expr : expr
-conditional operator
-
-@item = *= /= %= += -= <<= >>= &= ^= |=
-assignment
-
-@item expr1 , expr2
-comma
-@end table
-
-Shell variables are allowed as operands; parameter expansion is
-performed before the expression is evaluated.
-Within an expression, shell variables may also be referenced by name
-without using the parameter expansion syntax.
-A shell variable that is null or unset evaluates to 0 when referenced
-by name without using the parameter expansion syntax.
-The value of a variable is evaluated as an arithmetic expression
-when it is referenced, or when a variable which has been given the
-@var{integer} attribute using @samp{declare -i} is assigned a value.
-A null value evaluates to 0.
-A shell variable need not have its @var{integer} attribute turned on
-to be used in an expression.
-
-Constants with a leading 0 are interpreted as octal numbers.
-A leading @samp{0x} or @samp{0X} denotes hexadecimal. Otherwise,
-numbers take the form [@var{base}@code{#}]@var{n}, where the optional @var{base}
-is a decimal number between 2 and 64 representing the arithmetic
-base, and @var{n} is a number in that base. If @var{base}@code{#} is
-omitted, then base 10 is used.
-The digits greater than 9 are represented by the lowercase letters,
-the uppercase letters, @samp{@@}, and @samp{_}, in that order.
-If @var{base} is less than or equal to 36, lowercase and uppercase
-letters may be used interchangeably to represent numbers between 10
-and 35.
-
-Operators are evaluated in order of precedence. Sub-expressions in
-parentheses are evaluated first and may override the precedence
-rules above.
-
-@node Aliases
-@section Aliases
-@cindex alias expansion
-
-@var{Aliases} allow a string to be substituted for a word when it is used
-as the first word of a simple command.
-The shell maintains a list of aliases that may be set and unset with
-the @code{alias} and @code{unalias} builtin commands.
-
-The first word of each simple command, if unquoted, is checked to see
-if it has an alias.
-If so, that word is replaced by the text of the alias.
-The characters @samp{/}, @samp{$}, @samp{`}, @samp{=} and any of the
-shell metacharacters or quoting characters listed above may not appear
-in an alias name.
-The replacement text may contain any valid
-shell input, including shell metacharacters.
-The first word of the replacement text is tested for
-aliases, but a word that is identical to an alias being expanded
-is not expanded a second time.
-This means that one may alias @code{ls} to @code{"ls -F"},
-for instance, and Bash does not try to recursively expand the
-replacement text. If the last character of the alias value is a
-space or tab character, then the next command word following the
-alias is also checked for alias expansion.
-
-Aliases are created and listed with the @code{alias}
-command, and removed with the @code{unalias} command.
-
-There is no mechanism for using arguments in the replacement text,
-as in @code{csh}.
-If arguments are needed, a shell function should be used
-(@pxref{Shell Functions}).
-
-Aliases are not expanded when the shell is not interactive,
-unless the @code{expand_aliases} shell option is set using
-@code{shopt} (@pxref{The Shopt Builtin}).
-
-The rules concerning the definition and use of aliases are
-somewhat confusing. Bash
-always reads at least one complete line
-of input before executing any
-of the commands on that line. Aliases are expanded when a
-command is read, not when it is executed. Therefore, an
-alias definition appearing on the same line as another
-command does not take effect until the next line of input is read.
-The commands following the alias definition
-on that line are not affected by the new alias.
-This behavior is also an issue when functions are executed.
-Aliases are expanded when a function definition is read,
-not when the function is executed, because a function definition
-is itself a compound command. As a consequence, aliases
-defined in a function are not available until after that
-function is executed. To be safe, always put
-alias definitions on a separate line, and do not use @code{alias}
-in compound commands.
-
-For almost every purpose, shell functions are preferred over aliases.
-
-@node Arrays
-@section Arrays
-@cindex arrays
-
-Bash provides one-dimensional indexed and associative array variables.
-Any variable may be used as an indexed array;
-the @code{declare} builtin will explicitly declare an array.
-There is no maximum
-limit on the size of an array, nor any requirement that members
-be indexed or assigned contiguously.
-Indexed arrays are referenced using integers (including arithmetic
-expressions (@pxref{Shell Arithmetic})) and are zero-based;
-associative arrays use arbitrary strings.
-
-An indexed array is created automatically if any variable is assigned to
-using the syntax
-@example
-name[@var{subscript}]=@var{value}
-@end example
-
-@noindent
-The @var{subscript}
-is treated as an arithmetic expression that must evaluate to a number.
-To explicitly declare an array, use
-@example
-declare -a @var{name}
-@end example
-@noindent
-The syntax
-@example
-declare -a @var{name}[@var{subscript}]
-@end example
-@noindent
-is also accepted; the @var{subscript} is ignored.
-
-Associative arrays are created using
-@example
-declare -A @var{name}.
-@end example
-
-Attributes may be
-specified for an array variable using the @code{declare} and
-@code{readonly} builtins. Each attribute applies to all members of
-an array.
-
-Arrays are assigned to using compound assignments of the form
-@example
-name=(value@var{1} @dots{} value@var{n})
-@end example
-@noindent
-where each
-@var{value} is of the form @code{[@var{subscript}]=}@var{string}.
-Indexed array assignments do not require the bracket and subscript.
-When assigning to indexed arrays, if
-the optional subscript is supplied, that index is assigned to;
-otherwise the index of the element assigned is the last index assigned
-to by the statement plus one. Indexing starts at zero.
-
-When assigning to an associative array, the subscript is required.
-
-This syntax is also accepted by the @code{declare}
-builtin. Individual array elements may be assigned to using the
-@code{name[}@var{subscript}@code{]=}@var{value} syntax introduced above.
-
-Any element of an array may be referenced using
-@code{$@{name[}@var{subscript}@code{]@}}.
-The braces are required to avoid
-conflicts with the shell's filename expansion operators. If the
-@var{subscript} is @samp{@@} or @samp{*}, the word expands to all members
-of the array @var{name}. These subscripts differ only when the word
-appears within double quotes.
-If the word is double-quoted,
-@code{$@{name[*]@}} expands to a single word with
-the value of each array member separated by the first character of the
-@env{IFS} variable, and @code{$@{name[@@]@}} expands each element of
-@var{name} to a separate word. When there are no array members,
-@code{$@{name[@@]@}} expands to nothing.
-If the double-quoted expansion occurs within a word, the expansion of
-the first parameter is joined with the beginning part of the original
-word, and the expansion of the last parameter is joined with the last
-part of the original word.
-This is analogous to the
-expansion of the special parameters @samp{@@} and @samp{*}.
-@code{$@{#name[}@var{subscript}@code{]@}} expands to the length of
-@code{$@{name[}@var{subscript}@code{]@}}.
-If @var{subscript} is @samp{@@} or
-@samp{*}, the expansion is the number of elements in the array.
-Referencing an array variable without a subscript is equivalent to
-referencing with a subscript of 0.
-If the @var{subscript}
-used to reference an element of an indexed array
-evaluates to a number less than zero, it is used as
-an offset from one greater than the array's maximum index (so a subcript
-of -1 refers to the last element of the array).
-
-An array variable is considered set if a subscript has been assigned a
-value. The null string is a valid value.
-
-The @code{unset} builtin is used to destroy arrays.
-@code{unset} @var{name}[@var{subscript}]
-destroys the array element at index @var{subscript}.
-Care must be taken to avoid unwanted side effects caused by filename
-expansion.
-@code{unset} @var{name}, where @var{name} is an array, removes the
-entire array. A subscript of @samp{*} or @samp{@@} also removes the
-entire array.
-
-The @code{declare}, @code{local}, and @code{readonly}
-builtins each accept a @option{-a} option to specify an indexed
-array and a @option{-A} option to specify an associative array.
-If both options are supplied, @option{-A} takes precedence.
-The @code{read} builtin accepts a @option{-a}
-option to assign a list of words read from the standard input
-to an array, and can read values from the standard input into
-individual array elements. The @code{set} and @code{declare}
-builtins display array values in a way that allows them to be
-reused as input.
-
-@node The Directory Stack
-@section The Directory Stack
-@cindex directory stack
-
-@menu
-* Directory Stack Builtins:: Bash builtin commands to manipulate
- the directory stack.
-@end menu
-
-The directory stack is a list of recently-visited directories. The
-@code{pushd} builtin adds directories to the stack as it changes
-the current directory, and the @code{popd} builtin removes specified
-directories from the stack and changes the current directory to
-the directory removed. The @code{dirs} builtin displays the contents
-of the directory stack.
-
-The contents of the directory stack are also visible
-as the value of the @env{DIRSTACK} shell variable.
-
-@node Directory Stack Builtins
-@subsection Directory Stack Builtins
-
-@table @code
-
-@item dirs
-@btindex dirs
-@example
-dirs [+@var{N} | -@var{N}] [-clpv]
-@end example
-Display the list of currently remembered directories. Directories
-are added to the list with the @code{pushd} command; the
-@code{popd} command removes directories from the list.
-@table @code
-@item +@var{N}
-Displays the @var{N}th directory (counting from the left of the
-list printed by @code{dirs} when invoked without options), starting
-with zero.
-@item -@var{N}
-Displays the @var{N}th directory (counting from the right of the
-list printed by @code{dirs} when invoked without options), starting
-with zero.
-@item -c
-Clears the directory stack by deleting all of the elements.
-@item -l
-Produces a longer listing; the default listing format uses a
-tilde to denote the home directory.
-@item -p
-Causes @code{dirs} to print the directory stack with one entry per
-line.
-@item -v
-Causes @code{dirs} to print the directory stack with one entry per
-line, prefixing each entry with its index in the stack.
-@end table
-
-@item popd
-@btindex popd
-@example
-popd [+@var{N} | -@var{N}] [-n]
-@end example
-
-Remove the top entry from the directory stack, and @code{cd}
-to the new top directory.
-When no arguments are given, @code{popd}
-removes the top directory from the stack and
-performs a @code{cd} to the new top directory. The
-elements are numbered from 0 starting at the first directory listed with
-@code{dirs}; i.e., @code{popd} is equivalent to @code{popd +0}.
-@table @code
-@item +@var{N}
-Removes the @var{N}th directory (counting from the left of the
-list printed by @code{dirs}), starting with zero.
-@item -@var{N}
-Removes the @var{N}th directory (counting from the right of the
-list printed by @code{dirs}), starting with zero.
-@item -n
-Suppresses the normal change of directory when removing directories
-from the stack, so that only the stack is manipulated.
-@end table
-
-@btindex pushd
-@item pushd
-@example
-pushd [-n] [@var{+N} | @var{-N} | @var{dir} ]
-@end example
-
-Save the current directory on the top of the directory stack
-and then @code{cd} to @var{dir}.
-With no arguments, @code{pushd} exchanges the top two directories.
-
-@table @code
-@item -n
-Suppresses the normal change of directory when adding directories
-to the stack, so that only the stack is manipulated.
-@item +@var{N}
-Brings the @var{N}th directory (counting from the left of the
-list printed by @code{dirs}, starting with zero) to the top of
-the list by rotating the stack.
-@item -@var{N}
-Brings the @var{N}th directory (counting from the right of the
-list printed by @code{dirs}, starting with zero) to the top of
-the list by rotating the stack.
-@item @var{dir}
-Makes the current working directory be the top of the stack, and then
-executes the equivalent of `@code{cd} @var{dir}'.
-@code{cd}s to @var{dir}.
-@end table
-
-@end table
-
-@node Printing a Prompt
-@section Controlling the Prompt
-@cindex prompting
-
-The value of the variable @env{PROMPT_COMMAND} is examined just before
-Bash prints each primary prompt. If @env{PROMPT_COMMAND} is set and
-has a non-null value, then the
-value is executed just as if it had been typed on the command line.
-
-In addition, the following table describes the special characters which
-can appear in the prompt variables:
-
-@table @code
-@item \a
-A bell character.
-@item \d
-The date, in "Weekday Month Date" format (e.g., "Tue May 26").
-@item \D@{@var{format}@}
-The @var{format} is passed to @code{strftime}(3) and the result is inserted
-into the prompt string; an empty @var{format} results in a locale-specific
-time representation. The braces are required.
-@item \e
-An escape character.
-@item \h
-The hostname, up to the first `.'.
-@item \H
-The hostname.
-@item \j
-The number of jobs currently managed by the shell.
-@item \l
-The basename of the shell's terminal device name.
-@item \n
-A newline.
-@item \r
-A carriage return.
-@item \s
-The name of the shell, the basename of @code{$0} (the portion
-following the final slash).
-@item \t
-The time, in 24-hour HH:MM:SS format.
-@item \T
-The time, in 12-hour HH:MM:SS format.
-@item \@@
-The time, in 12-hour am/pm format.
-@item \A
-The time, in 24-hour HH:MM format.
-@item \u
-The username of the current user.
-@item \v
-The version of Bash (e.g., 2.00)
-@item \V
-The release of Bash, version + patchlevel (e.g., 2.00.0)
-@item \w
-The current working directory, with @env{$HOME} abbreviated with a tilde
-(uses the @env{$PROMPT_DIRTRIM} variable).
-@item \W
-The basename of @env{$PWD}, with @env{$HOME} abbreviated with a tilde.
-@item \!
-The history number of this command.
-@item \#
-The command number of this command.
-@item \$
-If the effective uid is 0, @code{#}, otherwise @code{$}.
-@item \@var{nnn}
-The character whose ASCII code is the octal value @var{nnn}.
-@item \\
-A backslash.
-@item \[
-Begin a sequence of non-printing characters. This could be used to
-embed a terminal control sequence into the prompt.
-@item \]
-End a sequence of non-printing characters.
-@end table
-
-The command number and the history number are usually different:
-the history number of a command is its position in the history
-list, which may include commands restored from the history file
-(@pxref{Bash History Facilities}), while the command number is
-the position in the sequence of commands executed during the current
-shell session.
-
-After the string is decoded, it is expanded via
-parameter expansion, command substitution, arithmetic
-expansion, and quote removal, subject to the value of the
-@code{promptvars} shell option (@pxref{Bash Builtins}).
-
-@node The Restricted Shell
-@section The Restricted Shell
-@cindex restricted shell
-
-If Bash is started with the name @code{rbash}, or the
-@option{--restricted}
-or
-@option{-r}
-option is supplied at invocation, the shell becomes restricted.
-A restricted shell is used to
-set up an environment more controlled than the standard shell.
-A restricted shell behaves identically to @code{bash}
-with the exception that the following are disallowed or not performed:
-
-@itemize @bullet
-@item
-Changing directories with the @code{cd} builtin.
-@item
-Setting or unsetting the values of the @env{SHELL}, @env{PATH},
-@env{ENV}, or @env{BASH_ENV} variables.
-@item
-Specifying command names containing slashes.
-@item
-Specifying a filename containing a slash as an argument to the @code{.}
-builtin command.
-@item
-Specifying a filename containing a slash as an argument to the @option{-p}
-option to the @code{hash} builtin command.
-@item
-Importing function definitions from the shell environment at startup.
-@item
-Parsing the value of @env{SHELLOPTS} from the shell environment at startup.
-@item
-Redirecting output using the @samp{>}, @samp{>|}, @samp{<>}, @samp{>&},
-@samp{&>}, and @samp{>>} redirection operators.
-@item
-Using the @code{exec} builtin to replace the shell with another command.
-@item
-Adding or deleting builtin commands with the
-@option{-f} and @option{-d} options to the @code{enable} builtin.
-@item
-Using the @code{enable} builtin command to enable disabled shell builtins.
-@item
-Specifying the @option{-p} option to the @code{command} builtin.
-@item
-Turning off restricted mode with @samp{set +r} or @samp{set +o restricted}.
-@end itemize
-
-These restrictions are enforced after any startup files are read.
-
-When a command that is found to be a shell script is executed
-(@pxref{Shell Scripts}), @code{rbash} turns off any restrictions in
-the shell spawned to execute the script.
-
-@node Bash POSIX Mode
-@section Bash POSIX Mode
-@cindex POSIX Mode
-
-Starting Bash with the @option{--posix} command-line option or executing
-@samp{set -o posix} while Bash is running will cause Bash to conform more
-closely to the @sc{posix} standard by changing the behavior to
-match that specified by @sc{posix} in areas where the Bash default differs.
-
-When invoked as @code{sh}, Bash enters @sc{posix} mode after reading the
-startup files.
-
-The following list is what's changed when `@sc{posix} mode' is in effect:
-
-@enumerate
-@item
-When a command in the hash table no longer exists, Bash will re-search
-@env{$PATH} to find the new location. This is also available with
-@samp{shopt -s checkhash}.
-
-@item
-The message printed by the job control code and builtins when a job
-exits with a non-zero status is `Done(status)'.
-
-@item
-The message printed by the job control code and builtins when a job
-is stopped is `Stopped(@var{signame})', where @var{signame} is, for
-example, @code{SIGTSTP}.
-
-@item
-The @code{bg} builtin uses the required format to describe each job placed
-in the background, which does not include an indication of whether the job
-is the current or previous job.
-
-@item
-Reserved words appearing in a context where reserved words are recognized
-do not undergo alias expansion.
-
-@item
-The @sc{posix} @env{PS1} and @env{PS2} expansions of @samp{!} to
-the history number and @samp{!!} to @samp{!} are enabled,
-and parameter expansion is performed on the values of @env{PS1} and
-@env{PS2} regardless of the setting of the @code{promptvars} option.
-
-@item
-The @sc{posix} startup files are executed (@env{$ENV}) rather than
-the normal Bash files.
-
-@item
-Tilde expansion is only performed on assignments preceding a command
-name, rather than on all assignment statements on the line.
-
-@item
-The default history file is @file{~/.sh_history} (this is the
-default value of @env{$HISTFILE}).
-
-@item
-The output of @samp{kill -l} prints all the signal names on a single line,
-separated by spaces, without the @samp{SIG} prefix.
-
-@item
-The @code{kill} builtin does not accept signal names with a @samp{SIG}
-prefix.
-
-@item
-Non-interactive shells exit if @var{filename} in @code{.} @var{filename}
-is not found.
-
-@item
-Non-interactive shells exit if a syntax error in an arithmetic expansion
-results in an invalid expression.
-
-@item
-Non-interactive shells exit if there is a syntax error in a script read
-with the @code{.} or @code{source} builtins, or in a string processed by
-the @code{eval} builtin.
-
-@item
-Redirection operators do not perform filename expansion on the word
-in the redirection unless the shell is interactive.
-
-@item
-Redirection operators do not perform word splitting on the word in the
-redirection.
-
-@item
-Function names must be valid shell @code{name}s. That is, they may not
-contain characters other than letters, digits, and underscores, and
-may not start with a digit. Declaring a function with an invalid name
-causes a fatal syntax error in non-interactive shells.
-
-@item
-@sc{posix} special builtins are found before shell functions
-during command lookup.
-
-@item
-The @code{time} reserved word may be used by itself as a command. When
-used in this way, it displays timing statistics for the shell and its
-completed children. The @env{TIMEFORMAT} variable controls the format
-of the timing information.
-
-@item
-When parsing and expanding a $@{@dots{}@} expansion that appears within
-double quotes, single quotes are no longer special and cannot be used to
-quote a closing brace or other special character, unless the operator is
-one of those defined to perform pattern removal. In this case, they do
-not have to appear as matched pairs.
-
-@item
-The parser does not recognize @code{time} as a reserved word if the next
-token begins with a @samp{-}.
-
-@item
-If a @sc{posix} special builtin returns an error status, a
-non-interactive shell exits. The fatal errors are those listed in
-the @sc{posix} standard, and include things like passing incorrect options,
-redirection errors, variable assignment errors for assignments preceding
-the command name, and so on.
-
-@item
-A non-interactive shell exits with an error status if a variable
-assignment error occurs when no command name follows the assignment
-statements.
-A variable assignment error occurs, for example, when trying to assign
-a value to a readonly variable.
-
-@item
-A non-interactive shell exists with an error status if a variable
-assignment error occurs in an assignment statement preceding a special
-builtin, but not with any other simple command.
-
-@item
-A non-interactive shell exits with an error status if the iteration
-variable in a @code{for} statement or the selection variable in a
-@code{select} statement is a readonly variable.
-
-@item
-Process substitution is not available.
-
-@item
-While variable indirection is available, it may not be applied to the
-@samp{#} and @samp{?} special parameters.
-
-@item
-Assignment statements preceding @sc{posix} special builtins
-persist in the shell environment after the builtin completes.
-
-@item
-Assignment statements preceding shell function calls persist in the
-shell environment after the function returns, as if a @sc{posix}
-special builtin command had been executed.
-
-@item
-The @code{export} and @code{readonly} builtin commands display their
-output in the format required by @sc{posix}.
-
-@item
-The @code{trap} builtin displays signal names without the leading
-@code{SIG}.
-
-@item
-The @code{trap} builtin doesn't check the first argument for a possible
-signal specification and revert the signal handling to the original
-disposition if it is, unless that argument consists solely of digits and
-is a valid signal number. If users want to reset the handler for a given
-signal to the original disposition, they should use @samp{-} as the
-first argument.
-
-@item
-The @code{.} and @code{source} builtins do not search the current directory
-for the filename argument if it is not found by searching @env{PATH}.
-
-@item
-Subshells spawned to execute command substitutions inherit the value of
-the @option{-e} option from the parent shell. When not in @sc{posix} mode,
-Bash clears the @option{-e} option in such subshells.
-
-@item
-Alias expansion is always enabled, even in non-interactive shells.
-
-@item
-When the @code{alias} builtin displays alias definitions, it does not
-display them with a leading @samp{alias } unless the @option{-p} option
-is supplied.
-
-@item
-When the @code{set} builtin is invoked without options, it does not display
-shell function names and definitions.
-
-@item
-When the @code{set} builtin is invoked without options, it displays
-variable values without quotes, unless they contain shell metacharacters,
-even if the result contains nonprinting characters.
-
-@item
-When the @code{cd} builtin is invoked in @var{logical} mode, and the pathname
-constructed from @code{$PWD} and the directory name supplied as an argument
-does not refer to an existing directory, @code{cd} will fail instead of
-falling back to @var{physical} mode.
-
-@item
-The @code{pwd} builtin verifies that the value it prints is the same as the
-current directory, even if it is not asked to check the file system with the
-@option{-P} option.
-
-@item
-When listing the history, the @code{fc} builtin does not include an
-indication of whether or not a history entry has been modified.
-
-@item
-The default editor used by @code{fc} is @code{ed}.
-
-@item
-The @code{type} and @code{command} builtins will not report a non-executable
-file as having been found, though the shell will attempt to execute such a
-file if it is the only so-named file found in @code{$PATH}.
-
-@item
-The @code{vi} editing mode will invoke the @code{vi} editor directly when
-the @samp{v} command is run, instead of checking @code{$VISUAL} and
-@code{$EDITOR}.
-
-@item
-When the @code{xpg_echo} option is enabled, Bash does not attempt to interpret
-any arguments to @code{echo} as options. Each argument is displayed, after
-escape characters are converted.
-
-@item
-The @code{ulimit} builtin uses a block size of 512 bytes for the @option{-c}
-and @option{-f} options.
-
-@item
-The arrival of @code{SIGCHLD} when a trap is set on @code{SIGCHLD} does
-not interrupt the @code{wait} builtin and cause it to return immediately.
-The trap command is run once for each child that exits.
-
-@end enumerate
-
-There is other @sc{posix} behavior that Bash does not implement by
-default even when in @sc{posix} mode.
-Specifically:
-
-@enumerate
-
-@item
-The @code{fc} builtin checks @code{$EDITOR} as a program to edit history
-entries if @code{FCEDIT} is unset, rather than defaulting directly to
-@code{ed}. @code{fc} uses @code{ed} if @code{EDITOR} is unset.
-
-@item
-As noted above, Bash requires the @code{xpg_echo} option to be enabled for
-the @code{echo} builtin to be fully conformant.
-
-@end enumerate
-
-Bash can be configured to be @sc{posix}-conformant by default, by specifying
-the @option{--enable-strict-posix-default} to @code{configure} when building
-(@pxref{Optional Features}).
-
-@node Job Control
-@chapter Job Control
-
-This chapter discusses what job control is, how it works, and how
-Bash allows you to access its facilities.
-
-@menu
-* Job Control Basics:: How job control works.
-* Job Control Builtins:: Bash builtin commands used to interact
- with job control.
-* Job Control Variables:: Variables Bash uses to customize job
- control.
-@end menu
-
-@node Job Control Basics
-@section Job Control Basics
-@cindex job control
-@cindex foreground
-@cindex background
-@cindex suspending jobs
-
-Job control
-refers to the ability to selectively stop (suspend)
-the execution of processes and continue (resume)
-their execution at a later point. A user typically employs
-this facility via an interactive interface supplied jointly
-by the operating system kernel's terminal driver and Bash.
-
-The shell associates a @var{job} with each pipeline. It keeps a
-table of currently executing jobs, which may be listed with the
-@code{jobs} command. When Bash starts a job
-asynchronously, it prints a line that looks
-like:
-@example
-[1] 25647
-@end example
-@noindent
-indicating that this job is job number 1 and that the process @sc{id}
-of the last process in the pipeline associated with this job is
-25647. All of the processes in a single pipeline are members of
-the same job. Bash uses the @var{job} abstraction as the
-basis for job control.
-
-To facilitate the implementation of the user interface to job
-control, the operating system maintains the notion of a current terminal
-process group @sc{id}. Members of this process group (processes whose
-process group @sc{id} is equal to the current terminal process group
-@sc{id}) receive keyboard-generated signals such as @code{SIGINT}.
-These processes are said to be in the foreground. Background
-processes are those whose process group @sc{id} differs from the
-terminal's; such processes are immune to keyboard-generated
-signals. Only foreground processes are allowed to read from or, if
-the user so specifies with @code{stty tostop}, write to the terminal.
-Background processes which attempt to
-read from (write to when @code{stty tostop} is in effect) the
-terminal are sent a @code{SIGTTIN} (@code{SIGTTOU})
-signal by the kernel's terminal driver,
-which, unless caught, suspends the process.
-
-If the operating system on which Bash is running supports
-job control, Bash contains facilities to use it. Typing the
-@var{suspend} character (typically @samp{^Z}, Control-Z) while a
-process is running causes that process to be stopped and returns
-control to Bash. Typing the @var{delayed suspend} character
-(typically @samp{^Y}, Control-Y) causes the process to be stopped
-when it attempts to read input from the terminal, and control to
-be returned to Bash. The user then manipulates the state of
-this job, using the @code{bg} command to continue it in the
-background, the @code{fg} command to continue it in the
-foreground, or the @code{kill} command to kill it. A @samp{^Z}
-takes effect immediately, and has the additional side effect of
-causing pending output and typeahead to be discarded.
-
-There are a number of ways to refer to a job in the shell. The
-character @samp{%} introduces a job specification (@var{jobspec}).
-
-Job number @code{n} may be referred to as @samp{%n}.
-The symbols @samp{%%} and @samp{%+} refer to the shell's notion of the
-current job, which is the last job stopped while it was in the foreground
-or started in the background.
-A single @samp{%} (with no accompanying job specification) also refers
-to the current job.
-The previous job may be referenced using @samp{%-}.
-If there is only a single job, @samp{%+} and @samp{%-} can both be used
-to refer to that job.
-In output pertaining to jobs (e.g., the output of the @code{jobs}
-command), the current job is always flagged with a @samp{+}, and the
-previous job with a @samp{-}.
-
-A job may also be referred to
-using a prefix of the name used to start it, or using a substring
-that appears in its command line. For example, @samp{%ce} refers
-to a stopped @code{ce} job. Using @samp{%?ce}, on the
-other hand, refers to any job containing the string @samp{ce} in
-its command line. If the prefix or substring matches more than one job,
-Bash reports an error.
-
-Simply naming a job can be used to bring it into the foreground:
-@samp{%1} is a synonym for @samp{fg %1}, bringing job 1 from the
-background into the foreground. Similarly, @samp{%1 &} resumes
-job 1 in the background, equivalent to @samp{bg %1}
-
-The shell learns immediately whenever a job changes state.
-Normally, Bash waits until it is about to print a prompt
-before reporting changes in a job's status so as to not interrupt
-any other output.
-If the @option{-b} option to the @code{set} builtin is enabled,
-Bash reports such changes immediately (@pxref{The Set Builtin}).
-Any trap on @code{SIGCHLD} is executed for each child process
-that exits.
-
-If an attempt to exit Bash is made while jobs are stopped, (or running, if
-the @code{checkjobs} option is enabled -- see @ref{The Shopt Builtin}), the
-shell prints a warning message, and if the @code{checkjobs} option is
-enabled, lists the jobs and their statuses.
-The @code{jobs} command may then be used to inspect their status.
-If a second attempt to exit is made without an intervening command,
-Bash does not print another warning, and any stopped jobs are terminated.
-
-@node Job Control Builtins
-@section Job Control Builtins
-
-@table @code
-
-@item bg
-@btindex bg
-@example
-bg [@var{jobspec} @dots{}]
-@end example
-Resume each suspended job @var{jobspec} in the background, as if it
-had been started with @samp{&}.
-If @var{jobspec} is not supplied, the current job is used.
-The return status is zero unless it is run when job control is not
-enabled, or, when run with job control enabled, any
-@var{jobspec} was not found or specifies a job
-that was started without job control.
-
-@item fg
-@btindex fg
-@example
-fg [@var{jobspec}]
-@end example
-Resume the job @var{jobspec} in the foreground and make it the current job.
-If @var{jobspec} is not supplied, the current job is used.
-The return status is that of the command placed into the foreground,
-or non-zero if run when job control is disabled or, when run with
-job control enabled, @var{jobspec} does not specify a valid job or
-@var{jobspec} specifies a job that was started without job control.
-
-@item jobs
-@btindex jobs
-@example
-jobs [-lnprs] [@var{jobspec}]
-jobs -x @var{command} [@var{arguments}]
-@end example
-
-The first form lists the active jobs. The options have the
-following meanings:
-
-@table @code
-@item -l
-List process @sc{id}s in addition to the normal information.
-
-@item -n
-Display information only about jobs that have changed status since
-the user was last notified of their status.
-
-@item -p
-List only the process @sc{id} of the job's process group leader.
-
-@item -r
-Restrict output to running jobs.
-
-@item -s
-Restrict output to stopped jobs.
-@end table
-
-If @var{jobspec} is given,
-output is restricted to information about that job.
-If @var{jobspec} is not supplied, the status of all jobs is
-listed.
-
-If the @option{-x} option is supplied, @code{jobs} replaces any
-@var{jobspec} found in @var{command} or @var{arguments} with the
-corresponding process group @sc{id}, and executes @var{command},
-passing it @var{argument}s, returning its exit status.
-
-@item kill
-@btindex kill
-@example
-kill [-s @var{sigspec}] [-n @var{signum}] [-@var{sigspec}] @var{jobspec} or @var{pid}
-kill -l [@var{exit_status}]
-@end example
-Send a signal specified by @var{sigspec} or @var{signum} to the process
-named by job specification @var{jobspec} or process @sc{id} @var{pid}.
-@var{sigspec} is either a case-insensitive signal name such as
-@code{SIGINT} (with or without the @code{SIG} prefix)
-or a signal number; @var{signum} is a signal number.
-If @var{sigspec} and @var{signum} are not present, @code{SIGTERM} is used.
-The @option{-l} option lists the signal names.
-If any arguments are supplied when @option{-l} is given, the names of the
-signals corresponding to the arguments are listed, and the return status
-is zero.
-@var{exit_status} is a number specifying a signal number or the exit
-status of a process terminated by a signal.
-The return status is zero if at least one signal was successfully sent,
-or non-zero if an error occurs or an invalid option is encountered.
-
-@item wait
-@btindex wait
-@example
-wait [@var{jobspec} or @var{pid} ...]
-@end example
-Wait until the child process specified by each process @sc{id} @var{pid}
-or job specification @var{jobspec} exits and return the exit status of the
-last command waited for.
-If a job spec is given, all processes in the job are waited for.
-If no arguments are given, all currently active child processes are
-waited for, and the return status is zero.
-If neither @var{jobspec} nor @var{pid} specifies an active child process
-of the shell, the return status is 127.
-
-@item disown
-@btindex disown
-@example
-disown [-ar] [-h] [@var{jobspec} @dots{}]
-@end example
-Without options, each @var{jobspec} is removed from the table of
-active jobs.
-If the @option{-h} option is given, the job is not removed from the table,
-but is marked so that @code{SIGHUP} is not sent to the job if the shell
-receives a @code{SIGHUP}.
-If @var{jobspec} is not present, and neither the @option{-a} nor @option{-r}
-option is supplied, the current job is used.
-If no @var{jobspec} is supplied, the @option{-a} option means to remove or
-mark all jobs; the @option{-r} option without a @var{jobspec}
-argument restricts operation to running jobs.
-
-@item suspend
-@btindex suspend
-@example
-suspend [-f]
-@end example
-Suspend the execution of this shell until it receives a
-@code{SIGCONT} signal.
-A login shell cannot be suspended; the @option{-f}
-option can be used to override this and force the suspension.
-
-@end table
-
-When job control is not active, the @code{kill} and @code{wait}
-builtins do not accept @var{jobspec} arguments. They must be
-supplied process @sc{id}s.
-
-@node Job Control Variables
-@section Job Control Variables
-
-@vtable @code
-
-@item auto_resume
-This variable controls how the shell interacts with the user and
-job control. If this variable exists then single word simple
-commands without redirections are treated as candidates for resumption
-of an existing job. There is no ambiguity allowed; if there is
-more than one job beginning with the string typed, then
-the most recently accessed job will be selected.
-The name of a stopped job, in this context, is the command line
-used to start it. If this variable is set to the value @samp{exact},
-the string supplied must match the name of a stopped job exactly;
-if set to @samp{substring},
-the string supplied needs to match a substring of the name of a
-stopped job. The @samp{substring} value provides functionality
-analogous to the @samp{%?} job @sc{id} (@pxref{Job Control Basics}).
-If set to any other value, the supplied string must
-be a prefix of a stopped job's name; this provides functionality
-analogous to the @samp{%} job @sc{id}.
-
-@end vtable
-
-@set readline-appendix
-@set history-appendix
-@cindex Readline, how to use
-@include rluser.texi
-@cindex History, how to use
-@include hsuser.texi
-@clear readline-appendix
-@clear history-appendix
-
-@node Installing Bash
-@chapter Installing Bash
-
-This chapter provides basic instructions for installing Bash on
-the various supported platforms. The distribution supports the
-@sc{gnu} operating systems, nearly every version of Unix, and several
-non-Unix systems such as BeOS and Interix.
-Other independent ports exist for
-@sc{ms-dos}, @sc{os/2}, and Windows platforms.
-
-@menu
-* Basic Installation:: Installation instructions.
-* Compilers and Options:: How to set special options for various
- systems.
-* Compiling For Multiple Architectures:: How to compile Bash for more
- than one kind of system from
- the same source tree.
-* Installation Names:: How to set the various paths used by the installation.
-* Specifying the System Type:: How to configure Bash for a particular system.
-* Sharing Defaults:: How to share default configuration values among GNU
- programs.
-* Operation Controls:: Options recognized by the configuration program.
-* Optional Features:: How to enable and disable optional features when
- building Bash.
-@end menu
-
-@node Basic Installation
-@section Basic Installation
-@cindex installation
-@cindex configuration
-@cindex Bash installation
-@cindex Bash configuration
-
-These are installation instructions for Bash.
-
-The simplest way to compile Bash is:
-
-@enumerate
-@item
-@code{cd} to the directory containing the source code and type
-@samp{./configure} to configure Bash for your system. If you're
-using @code{csh} on an old version of System V, you might need to
-type @samp{sh ./configure} instead to prevent @code{csh} from trying
-to execute @code{configure} itself.
-
-Running @code{configure} takes some time.
-While running, it prints messages telling which features it is
-checking for.
-
-@item
-Type @samp{make} to compile Bash and build the @code{bashbug} bug
-reporting script.
-
-@item
-Optionally, type @samp{make tests} to run the Bash test suite.
-
-@item
-Type @samp{make install} to install @code{bash} and @code{bashbug}.
-This will also install the manual pages and Info file.
-
-@end enumerate
-
-The @code{configure} shell script attempts to guess correct
-values for various system-dependent variables used during
-compilation. It uses those values to create a @file{Makefile} in
-each directory of the package (the top directory, the
-@file{builtins}, @file{doc}, and @file{support} directories,
-each directory under @file{lib}, and several others). It also creates a
-@file{config.h} file containing system-dependent definitions.
-Finally, it creates a shell script named @code{config.status} that you
-can run in the future to recreate the current configuration, a
-file @file{config.cache} that saves the results of its tests to
-speed up reconfiguring, and a file @file{config.log} containing
-compiler output (useful mainly for debugging @code{configure}).
-If at some point
-@file{config.cache} contains results you don't want to keep, you
-may remove or edit it.
-
-To find out more about the options and arguments that the
-@code{configure} script understands, type
-
-@example
-bash-2.04$ ./configure --help
-@end example
-
-@noindent
-at the Bash prompt in your Bash source directory.
-
-If you need to do unusual things to compile Bash, please
-try to figure out how @code{configure} could check whether or not
-to do them, and mail diffs or instructions to
-@email{bash-maintainers@@gnu.org} so they can be
-considered for the next release.
-
-The file @file{configure.in} is used to create @code{configure}
-by a program called Autoconf. You only need
-@file{configure.in} if you want to change it or regenerate
-@code{configure} using a newer version of Autoconf. If
-you do this, make sure you are using Autoconf version 2.50 or
-newer.
-
-You can remove the program binaries and object files from the
-source code directory by typing @samp{make clean}. To also remove the
-files that @code{configure} created (so you can compile Bash for
-a different kind of computer), type @samp{make distclean}.
-
-@node Compilers and Options
-@section Compilers and Options
-
-Some systems require unusual options for compilation or linking
-that the @code{configure} script does not know about. You can
-give @code{configure} initial values for variables by setting
-them in the environment. Using a Bourne-compatible shell, you
-can do that on the command line like this:
-
-@example
-CC=c89 CFLAGS=-O2 LIBS=-lposix ./configure
-@end example
-
-On systems that have the @code{env} program, you can do it like this:
-
-@example
-env CPPFLAGS=-I/usr/local/include LDFLAGS=-s ./configure
-@end example
-
-The configuration process uses GCC to build Bash if it
-is available.
-
-@node Compiling For Multiple Architectures
-@section Compiling For Multiple Architectures
-
-You can compile Bash for more than one kind of computer at the
-same time, by placing the object files for each architecture in their
-own directory. To do this, you must use a version of @code{make} that
-supports the @code{VPATH} variable, such as GNU @code{make}.
-@code{cd} to the
-directory where you want the object files and executables to go and run
-the @code{configure} script from the source directory. You may need to
-supply the @option{--srcdir=PATH} argument to tell @code{configure} where the
-source files are. @code{configure} automatically checks for the
-source code in the directory that @code{configure} is in and in `..'.
-
-If you have to use a @code{make} that does not supports the @code{VPATH}
-variable, you can compile Bash for one architecture at a
-time in the source code directory. After you have installed
-Bash for one architecture, use @samp{make distclean} before
-reconfiguring for another architecture.
-
-Alternatively, if your system supports symbolic links, you can use the
-@file{support/mkclone} script to create a build tree which has
-symbolic links back to each file in the source directory. Here's an
-example that creates a build directory in the current directory from a
-source directory @file{/usr/gnu/src/bash-2.0}:
-
-@example
-bash /usr/gnu/src/bash-2.0/support/mkclone -s /usr/gnu/src/bash-2.0 .
-@end example
-
-@noindent
-The @code{mkclone} script requires Bash, so you must have already built
-Bash for at least one architecture before you can create build
-directories for other architectures.
-
-@node Installation Names
-@section Installation Names
-
-By default, @samp{make install} will install into
-@file{/usr/local/bin}, @file{/usr/local/man}, etc. You can
-specify an installation prefix other than @file{/usr/local} by
-giving @code{configure} the option @option{--prefix=@var{PATH}},
-or by specifying a value for the @code{DESTDIR} @samp{make}
-variable when running @samp{make install}.
-
-You can specify separate installation prefixes for
-architecture-specific files and architecture-independent files.
-If you give @code{configure} the option
-@option{--exec-prefix=@var{PATH}}, @samp{make install} will use
-@var{PATH} as the prefix for installing programs and libraries.
-Documentation and other data files will still use the regular prefix.
-
-@node Specifying the System Type
-@section Specifying the System Type
-
-There may be some features @code{configure} can not figure out
-automatically, but need to determine by the type of host Bash
-will run on. Usually @code{configure} can figure that
-out, but if it prints a message saying it can not guess the host
-type, give it the @option{--host=TYPE} option. @samp{TYPE} can
-either be a short name for the system type, such as @samp{sun4},
-or a canonical name with three fields: @samp{CPU-COMPANY-SYSTEM}
-(e.g., @samp{i386-unknown-freebsd4.2}).
-
-See the file @file{support/config.sub} for the possible
-values of each field.
-
-@node Sharing Defaults
-@section Sharing Defaults
-
-If you want to set default values for @code{configure} scripts to
-share, you can create a site shell script called
-@code{config.site} that gives default values for variables like
-@code{CC}, @code{cache_file}, and @code{prefix}. @code{configure}
-looks for @file{PREFIX/share/config.site} if it exists, then
-@file{PREFIX/etc/config.site} if it exists. Or, you can set the
-@code{CONFIG_SITE} environment variable to the location of the site
-script. A warning: the Bash @code{configure} looks for a site script,
-but not all @code{configure} scripts do.
-
-@node Operation Controls
-@section Operation Controls
-
-@code{configure} recognizes the following options to control how it
-operates.
-
-@table @code
-
-@item --cache-file=@var{file}
-Use and save the results of the tests in
-@var{file} instead of @file{./config.cache}. Set @var{file} to
-@file{/dev/null} to disable caching, for debugging
-@code{configure}.
-
-@item --help
-Print a summary of the options to @code{configure}, and exit.
-
-@item --quiet
-@itemx --silent
-@itemx -q
-Do not print messages saying which checks are being made.
-
-@item --srcdir=@var{dir}
-Look for the Bash source code in directory @var{dir}. Usually
-@code{configure} can determine that directory automatically.
-
-@item --version
-Print the version of Autoconf used to generate the @code{configure}
-script, and exit.
-@end table
-
-@code{configure} also accepts some other, not widely used, boilerplate
-options. @samp{configure --help} prints the complete list.
-
-@node Optional Features
-@section Optional Features
-
-The Bash @code{configure} has a number of @option{--enable-@var{feature}}
-options, where @var{feature} indicates an optional part of Bash.
-There are also several @option{--with-@var{package}} options,
-where @var{package} is something like @samp{bash-malloc} or @samp{purify}.
-To turn off the default use of a package, use
-@option{--without-@var{package}}. To configure Bash without a feature
-that is enabled by default, use @option{--disable-@var{feature}}.
-
-Here is a complete list of the @option{--enable-} and
-@option{--with-} options that the Bash @code{configure} recognizes.
-
-@table @code
-@item --with-afs
-Define if you are using the Andrew File System from Transarc.
-
-@item --with-bash-malloc
-Use the Bash version of
-@code{malloc} in the directory @file{lib/malloc}. This is not the same
-@code{malloc} that appears in @sc{gnu} libc, but an older version
-originally derived from the 4.2 @sc{bsd} @code{malloc}. This @code{malloc}
-is very fast, but wastes some space on each allocation.
-This option is enabled by default.
-The @file{NOTES} file contains a list of systems for
-which this should be turned off, and @code{configure} disables this
-option automatically for a number of systems.
-
-@item --with-curses
-Use the curses library instead of the termcap library. This should
-be supplied if your system has an inadequate or incomplete termcap
-database.
-
-@item --with-gnu-malloc
-A synonym for @code{--with-bash-malloc}.
-
-@item --with-installed-readline[=@var{PREFIX}]
-Define this to make Bash link with a locally-installed version of Readline
-rather than the version in @file{lib/readline}. This works only with
-Readline 5.0 and later versions. If @var{PREFIX} is @code{yes} or not
-supplied, @code{configure} uses the values of the make variables
-@code{includedir} and @code{libdir}, which are subdirectories of @code{prefix}
-by default, to find the installed version of Readline if it is not in
-the standard system include and library directories.
-If @var{PREFIX} is @code{no}, Bash links with the version in
-@file{lib/readline}.
-If @var{PREFIX} is set to any other value, @code{configure} treats it as
-a directory pathname and looks for
-the installed version of Readline in subdirectories of that directory
-(include files in @var{PREFIX}/@code{include} and the library in
-@var{PREFIX}/@code{lib}).
-
-@item --with-purify
-Define this to use the Purify memory allocation checker from Rational
-Software.
-
-@item --enable-minimal-config
-This produces a shell with minimal features, close to the historical
-Bourne shell.
-@end table
-
-There are several @option{--enable-} options that alter how Bash is
-compiled and linked, rather than changing run-time features.
-
-@table @code
-@item --enable-largefile
-Enable support for @uref{http://www.sas.com/standards/large_file/x_open.20Mar96.html,
-large files} if the operating system requires special compiler options
-to build programs which can access large files. This is enabled by
-default, if the operating system provides large file support.
-
-@item --enable-profiling
-This builds a Bash binary that produces profiling information to be
-processed by @code{gprof} each time it is executed.
-
-@item --enable-static-link
-This causes Bash to be linked statically, if @code{gcc} is being used.
-This could be used to build a version to use as root's shell.
-@end table
-
-The @samp{minimal-config} option can be used to disable all of
-the following options, but it is processed first, so individual
-options may be enabled using @samp{enable-@var{feature}}.
-
-All of the following options except for @samp{disabled-builtins} and
-@samp{xpg-echo-default} are
-enabled by default, unless the operating system does not provide the
-necessary support.
-
-@table @code
-@item --enable-alias
-Allow alias expansion and include the @code{alias} and @code{unalias}
-builtins (@pxref{Aliases}).
-
-@item --enable-arith-for-command
-Include support for the alternate form of the @code{for} command
-that behaves like the C language @code{for} statement
-(@pxref{Looping Constructs}).
-
-@item --enable-array-variables
-Include support for one-dimensional array shell variables
-(@pxref{Arrays}).
-
-@item --enable-bang-history
-Include support for @code{csh}-like history substitution
-(@pxref{History Interaction}).
-
-@item --enable-brace-expansion
-Include @code{csh}-like brace expansion
-( @code{b@{a,b@}c} @expansion{} @code{bac bbc} ).
-See @ref{Brace Expansion}, for a complete description.
-
-@item --enable-casemod-attributes
-Include support for case-modifying attributes in the @code{declare} builtin
-and assignment statements. Variables with the @var{uppercase} attribute,
-for example, will have their values converted to uppercase upon assignment.
-
-@item --enable-casemod-expansion
-Include support for case-modifying word expansions.
-
-@item --enable-command-timing
-Include support for recognizing @code{time} as a reserved word and for
-displaying timing statistics for the pipeline following @code{time}
-(@pxref{Pipelines}).
-This allows pipelines as well as shell builtins and functions to be timed.
-
-@item --enable-cond-command
-Include support for the @code{[[} conditional command.
-(@pxref{Conditional Constructs}).
-
-@item --enable-cond-regexp
-Include support for matching @sc{posix} regular expressions using the
-@samp{=~} binary operator in the @code{[[} conditional command.
-(@pxref{Conditional Constructs}).
-
-@item --enable-coprocesses
-Include support for coprocesses and the @code{coproc} reserved word
-(@pxref{Pipelines}).
-
-@item --enable-debugger
-Include support for the bash debugger (distributed separately).
-
-@item --enable-directory-stack
-Include support for a @code{csh}-like directory stack and the
-@code{pushd}, @code{popd}, and @code{dirs} builtins
-(@pxref{The Directory Stack}).
-
-@item --enable-disabled-builtins
-Allow builtin commands to be invoked via @samp{builtin xxx}
-even after @code{xxx} has been disabled using @samp{enable -n xxx}.
-See @ref{Bash Builtins}, for details of the @code{builtin} and
-@code{enable} builtin commands.
-
-@item --enable-dparen-arithmetic
-Include support for the @code{((@dots{}))} command
-(@pxref{Conditional Constructs}).
-
-@item --enable-extended-glob
-Include support for the extended pattern matching features described
-above under @ref{Pattern Matching}.
-
-@item --enable-extended-glob-default
-Set the default value of the @var{extglob} shell option described
-above under @ref{The Shopt Builtin} to be enabled.
-
-@item --enable-help-builtin
-Include the @code{help} builtin, which displays help on shell builtins and
-variables (@pxref{Bash Builtins}).
-
-@item --enable-history
-Include command history and the @code{fc} and @code{history}
-builtin commands (@pxref{Bash History Facilities}).
-
-@item --enable-job-control
-This enables the job control features (@pxref{Job Control}),
-if the operating system supports them.
-
-@item --enable-multibyte
-This enables support for multibyte characters if the operating
-system provides the necessary support.
-
-@item --enable-net-redirections
-This enables the special handling of filenames of the form
-@code{/dev/tcp/@var{host}/@var{port}} and
-@code{/dev/udp/@var{host}/@var{port}}
-when used in redirections (@pxref{Redirections}).
-
-@item --enable-process-substitution
-This enables process substitution (@pxref{Process Substitution}) if
-the operating system provides the necessary support.
-
-@item --enable-progcomp
-Enable the programmable completion facilities
-(@pxref{Programmable Completion}).
-If Readline is not enabled, this option has no effect.
-
-@item --enable-prompt-string-decoding
-Turn on the interpretation of a number of backslash-escaped characters
-in the @env{$PS1}, @env{$PS2}, @env{$PS3}, and @env{$PS4} prompt
-strings. See @ref{Printing a Prompt}, for a complete list of prompt
-string escape sequences.
-
-@item --enable-readline
-Include support for command-line editing and history with the Bash
-version of the Readline library (@pxref{Command Line Editing}).
-
-@item --enable-restricted
-Include support for a @dfn{restricted shell}. If this is enabled, Bash,
-when called as @code{rbash}, enters a restricted mode. See
-@ref{The Restricted Shell}, for a description of restricted mode.
-
-@item --enable-select
-Include the @code{select} compound command, which allows the generation of
-simple menus (@pxref{Conditional Constructs}).
-
-@item --enable-separate-helpfiles
-Use external files for the documentation displayed by the @code{help} builtin
-instead of storing the text internally.
-
-@item --enable-single-help-strings
-Store the text displayed by the @code{help} builtin as a single string for
-each help topic. This aids in translating the text to different languages.
-You may need to disable this if your compiler cannot handle very long string
-literals.
-
-@item --enable-strict-posix-default
-Make Bash @sc{posix}-conformant by default (@pxref{Bash POSIX Mode}).
-
-@item --enable-usg-echo-default
-A synonym for @code{--enable-xpg-echo-default}.
-
-@item --enable-xpg-echo-default
-Make the @code{echo} builtin expand backslash-escaped characters by default,
-without requiring the @option{-e} option.
-This sets the default value of the @code{xpg_echo} shell option to @code{on},
-which makes the Bash @code{echo} behave more like the version specified in
-the Single Unix Specification, version 3.
-@xref{Bash Builtins}, for a description of the escape sequences that
-@code{echo} recognizes.
-
-@end table
-
-The file @file{config-top.h} contains C Preprocessor
-@samp{#define} statements for options which are not settable from
-@code{configure}.
-Some of these are not meant to be changed; beware of the consequences if
-you do.
-Read the comments associated with each definition for more
-information about its effect.
-
-@node Reporting Bugs
-@appendix Reporting Bugs
-
-Please report all bugs you find in Bash.
-But first, you should
-make sure that it really is a bug, and that it appears in the latest
-version of Bash.
-The latest version of Bash is always available for FTP from
-@uref{ftp://ftp.gnu.org/pub/gnu/bash/}.
-
-Once you have determined that a bug actually exists, use the
-@code{bashbug} command to submit a bug report.
-If you have a fix, you are encouraged to mail that as well!
-Suggestions and `philosophical' bug reports may be mailed
-to @email{bug-bash@@gnu.org} or posted to the Usenet
-newsgroup @code{gnu.bash.bug}.
-
-All bug reports should include:
-@itemize @bullet
-@item
-The version number of Bash.
-@item
-The hardware and operating system.
-@item
-The compiler used to compile Bash.
-@item
-A description of the bug behaviour.
-@item
-A short script or `recipe' which exercises the bug and may be used
-to reproduce it.
-@end itemize
-
-@noindent
-@code{bashbug} inserts the first three items automatically into
-the template it provides for filing a bug report.
-
-Please send all reports concerning this manual to
-@email{chet.ramey@@case.edu}.
-
-@node Major Differences From The Bourne Shell
-@appendix Major Differences From The Bourne Shell
-
-Bash implements essentially the same grammar, parameter and
-variable expansion, redirection, and quoting as the Bourne Shell.
-Bash uses the @sc{posix} standard as the specification of
-how these features are to be implemented. There are some
-differences between the traditional Bourne shell and Bash; this
-section quickly details the differences of significance. A
-number of these differences are explained in greater depth in
-previous sections.
-This section uses the version of @code{sh} included in SVR4.2 (the
-last version of the historical Bourne shell) as the baseline reference.
-
-@itemize @bullet
-
-@item
-Bash is @sc{posix}-conformant, even where the @sc{posix} specification
-differs from traditional @code{sh} behavior (@pxref{Bash POSIX Mode}).
-
-@item
-Bash has multi-character invocation options (@pxref{Invoking Bash}).
-
-@item
-Bash has command-line editing (@pxref{Command Line Editing}) and
-the @code{bind} builtin.
-
-@item
-Bash provides a programmable word completion mechanism
-(@pxref{Programmable Completion}), and builtin commands
-@code{complete}, @code{compgen}, and @code{compopt}, to
-manipulate it.
-
-@item
-Bash has command history (@pxref{Bash History Facilities}) and the
-@code{history} and @code{fc} builtins to manipulate it.
-The Bash history list maintains timestamp information and uses the
-value of the @code{HISTTIMEFORMAT} variable to display it.
-
-@item
-Bash implements @code{csh}-like history expansion
-(@pxref{History Interaction}).
-
-@item
-Bash has one-dimensional array variables (@pxref{Arrays}), and the
-appropriate variable expansions and assignment syntax to use them.
-Several of the Bash builtins take options to act on arrays.
-Bash provides a number of built-in array variables.
-
-@item
-The @code{$'@dots{}'} quoting syntax, which expands ANSI-C
-backslash-escaped characters in the text between the single quotes,
-is supported (@pxref{ANSI-C Quoting}).
-
-@item
-Bash supports the @code{$"@dots{}"} quoting syntax to do
-locale-specific translation of the characters between the double
-quotes. The @option{-D}, @option{--dump-strings}, and @option{--dump-po-strings}
-invocation options list the translatable strings found in a script
-(@pxref{Locale Translation}).
-
-@item
-Bash implements the @code{!} keyword to negate the return value of
-a pipeline (@pxref{Pipelines}).
-Very useful when an @code{if} statement needs to act only if a test fails.
-The Bash @samp{-o pipefail} option to @code{set} will cause a pipeline to
-return a failure status if any command fails.
-
-@item
-Bash has the @code{time} reserved word and command timing (@pxref{Pipelines}).
-The display of the timing statistics may be controlled with the
-@env{TIMEFORMAT} variable.
-
-@item
-Bash implements the @code{for (( @var{expr1} ; @var{expr2} ; @var{expr3} ))}
-arithmetic for command, similar to the C language (@pxref{Looping Constructs}).
-
-@item
-Bash includes the @code{select} compound command, which allows the
-generation of simple menus (@pxref{Conditional Constructs}).
-
-@item
-Bash includes the @code{[[} compound command, which makes conditional
-testing part of the shell grammar (@pxref{Conditional Constructs}), including
-optional regular expression matching.
-
-@item
-Bash provides optional case-insensitive matching for the @code{case} and
-@code{[[} constructs.
-
-@item
-Bash includes brace expansion (@pxref{Brace Expansion}) and tilde
-expansion (@pxref{Tilde Expansion}).
-
-@item
-Bash implements command aliases and the @code{alias} and @code{unalias}
-builtins (@pxref{Aliases}).
-
-@item
-Bash provides shell arithmetic, the @code{((} compound command
-(@pxref{Conditional Constructs}),
-and arithmetic expansion (@pxref{Shell Arithmetic}).
-
-@item
-Variables present in the shell's initial environment are automatically
-exported to child processes. The Bourne shell does not normally do
-this unless the variables are explicitly marked using the @code{export}
-command.
-
-@item
-Bash supports the @samp{+=} assignment operator, which appends to the value
-of the variable named on the left hand side.
-
-@item
-Bash includes the @sc{posix} pattern removal @samp{%}, @samp{#}, @samp{%%}
-and @samp{##} expansions to remove leading or trailing substrings from
-variable values (@pxref{Shell Parameter Expansion}).
-
-@item
-The expansion @code{$@{#xx@}}, which returns the length of @code{$@{xx@}},
-is supported (@pxref{Shell Parameter Expansion}).
-
-@item
-The expansion @code{$@{var:}@var{offset}@code{[:}@var{length}@code{]@}},
-which expands to the substring of @code{var}'s value of length
-@var{length}, beginning at @var{offset}, is present
-(@pxref{Shell Parameter Expansion}).
-
-@item
-The expansion
-@code{$@{var/[/]}@var{pattern}@code{[/}@var{replacement}@code{]@}},
-which matches @var{pattern} and replaces it with @var{replacement} in
-the value of @code{var}, is available (@pxref{Shell Parameter Expansion}).
-
-@item
-The expansion @code{$@{!@var{prefix@}*}} expansion, which expands to
-the names of all shell variables whose names begin with @var{prefix},
-is available (@pxref{Shell Parameter Expansion}).
-
-@item
-Bash has @var{indirect} variable expansion using @code{$@{!word@}}
-(@pxref{Shell Parameter Expansion}).
-
-@item
-Bash can expand positional parameters beyond @code{$9} using
-@code{$@{@var{num}@}}.
-
-@item
-The @sc{posix} @code{$()} form of command substitution
-is implemented (@pxref{Command Substitution}),
-and preferred to the Bourne shell's @code{``} (which
-is also implemented for backwards compatibility).
-
-@item
-Bash has process substitution (@pxref{Process Substitution}).
-
-@item
-Bash automatically assigns variables that provide information about the
-current user (@env{UID}, @env{EUID}, and @env{GROUPS}), the current host
-(@env{HOSTTYPE}, @env{OSTYPE}, @env{MACHTYPE}, and @env{HOSTNAME}),
-and the instance of Bash that is running (@env{BASH},
-@env{BASH_VERSION}, and @env{BASH_VERSINFO}). @xref{Bash Variables},
-for details.
-
-@item
-The @env{IFS} variable is used to split only the results of expansion,
-not all words (@pxref{Word Splitting}).
-This closes a longstanding shell security hole.
-
-@item
-Bash implements the full set of @sc{posix} filename expansion operators,
-including @var{character classes}, @var{equivalence classes}, and
-@var{collating symbols} (@pxref{Filename Expansion}).
-
-@item
-Bash implements extended pattern matching features when the @code{extglob}
-shell option is enabled (@pxref{Pattern Matching}).
-
-@item
-It is possible to have a variable and a function with the same name;
-@code{sh} does not separate the two name spaces.
-
-@item
-Bash functions are permitted to have local variables using the
-@code{local} builtin, and thus useful recursive functions may be written
-(@pxref{Bash Builtins}).
-
-@item
-Variable assignments preceding commands affect only that command, even
-builtins and functions (@pxref{Environment}).
-In @code{sh}, all variable assignments
-preceding commands are global unless the command is executed from the
-file system.
-
-@item
-Bash performs filename expansion on filenames specified as operands
-to input and output redirection operators (@pxref{Redirections}).
-
-@item
-Bash contains the @samp{<>} redirection operator, allowing a file to be
-opened for both reading and writing, and the @samp{&>} redirection
-operator, for directing standard output and standard error to the same
-file (@pxref{Redirections}).
-
-@item
-Bash includes the @samp{<<<} redirection operator, allowing a string to
-be used as the standard input to a command.
-
-@item
-Bash implements the @samp{[n]<&@var{word}} and @samp{[n]>&@var{word}}
-redirection operators, which move one file descriptor to another.
-
-@item
-Bash treats a number of filenames specially when they are
-used in redirection operators (@pxref{Redirections}).
-
-@item
-Bash can open network connections to arbitrary machines and services
-with the redirection operators (@pxref{Redirections}).
-
-@item
-The @code{noclobber} option is available to avoid overwriting existing
-files with output redirection (@pxref{The Set Builtin}).
-The @samp{>|} redirection operator may be used to override @code{noclobber}.
-
-@item
-The Bash @code{cd} and @code{pwd} builtins (@pxref{Bourne Shell Builtins})
-each take @option{-L} and @option{-P} options to switch between logical and
-physical modes.
-
-@item
-Bash allows a function to override a builtin with the same name, and provides
-access to that builtin's functionality within the function via the
-@code{builtin} and @code{command} builtins (@pxref{Bash Builtins}).
-
-@item
-The @code{command} builtin allows selective disabling of functions
-when command lookup is performed (@pxref{Bash Builtins}).
-
-@item
-Individual builtins may be enabled or disabled using the @code{enable}
-builtin (@pxref{Bash Builtins}).
-
-@item
-The Bash @code{exec} builtin takes additional options that allow users
-to control the contents of the environment passed to the executed
-command, and what the zeroth argument to the command is to be
-(@pxref{Bourne Shell Builtins}).
-
-@item
-Shell functions may be exported to children via the environment
-using @code{export -f} (@pxref{Shell Functions}).
-
-@item
-The Bash @code{export}, @code{readonly}, and @code{declare} builtins can
-take a @option{-f} option to act on shell functions, a @option{-p} option to
-display variables with various attributes set in a format that can be
-used as shell input, a @option{-n} option to remove various variable
-attributes, and @samp{name=value} arguments to set variable attributes
-and values simultaneously.
-
-@item
-The Bash @code{hash} builtin allows a name to be associated with
-an arbitrary filename, even when that filename cannot be found by
-searching the @env{$PATH}, using @samp{hash -p}
-(@pxref{Bourne Shell Builtins}).
-
-@item
-Bash includes a @code{help} builtin for quick reference to shell
-facilities (@pxref{Bash Builtins}).
-
-@item
-The @code{printf} builtin is available to display formatted output
-(@pxref{Bash Builtins}).
-
-@item
-The Bash @code{read} builtin (@pxref{Bash Builtins})
-will read a line ending in @samp{\} with
-the @option{-r} option, and will use the @env{REPLY} variable as a
-default if no non-option arguments are supplied.
-The Bash @code{read} builtin
-also accepts a prompt string with the @option{-p} option and will use
-Readline to obtain the line when given the @option{-e} option.
-The @code{read} builtin also has additional options to control input:
-the @option{-s} option will turn off echoing of input characters as
-they are read, the @option{-t} option will allow @code{read} to time out
-if input does not arrive within a specified number of seconds, the
-@option{-n} option will allow reading only a specified number of
-characters rather than a full line, and the @option{-d} option will read
-until a particular character rather than newline.
-
-@item
-The @code{return} builtin may be used to abort execution of scripts
-executed with the @code{.} or @code{source} builtins
-(@pxref{Bourne Shell Builtins}).
-
-@item
-Bash includes the @code{shopt} builtin, for finer control of shell
-optional capabilities (@pxref{The Shopt Builtin}), and allows these options
-to be set and unset at shell invocation (@pxref{Invoking Bash}).
-
-@item
-Bash has much more optional behavior controllable with the @code{set}
-builtin (@pxref{The Set Builtin}).
-
-@item
-The @samp{-x} (@code{xtrace}) option displays commands other than
-simple commands when performing an execution trace
-(@pxref{The Set Builtin}).
-
-@item
-The @code{test} builtin (@pxref{Bourne Shell Builtins})
-is slightly different, as it implements the @sc{posix} algorithm,
-which specifies the behavior based on the number of arguments.
-
-@item
-Bash includes the @code{caller} builtin, which displays the context of
-any active subroutine call (a shell function or a script executed with
-the @code{.} or @code{source} builtins). This supports the bash
-debugger.
-
-@item
-The @code{trap} builtin (@pxref{Bourne Shell Builtins}) allows a
-@code{DEBUG} pseudo-signal specification, similar to @code{EXIT}.
-Commands specified with a @code{DEBUG} trap are executed before every
-simple command, @code{for} command, @code{case} command,
-@code{select} command, every arithmetic @code{for} command, and before
-the first command executes in a shell function.
-The @code{DEBUG} trap is not inherited by shell functions unless the
-function has been given the @code{trace} attribute or the
-@code{functrace} option has been enabled using the @code{shopt} builtin.
-The @code{extdebug} shell option has additional effects on the
-@code{DEBUG} trap.
-
-The @code{trap} builtin (@pxref{Bourne Shell Builtins}) allows an
-@code{ERR} pseudo-signal specification, similar to @code{EXIT} and @code{DEBUG}.
-Commands specified with an @code{ERR} trap are executed after a simple
-command fails, with a few exceptions.
-The @code{ERR} trap is not inherited by shell functions unless the
-@code{-o errtrace} option to the @code{set} builtin is enabled.
-
-The @code{trap} builtin (@pxref{Bourne Shell Builtins}) allows a
-@code{RETURN} pseudo-signal specification, similar to
-@code{EXIT} and @code{DEBUG}.
-Commands specified with an @code{RETURN} trap are executed before
-execution resumes after a shell function or a shell script executed with
-@code{.} or @code{source} returns.
-The @code{RETURN} trap is not inherited by shell functions unless the
-function has been given the @code{trace} attribute or the
-@code{functrace} option has been enabled using the @code{shopt} builtin.
-
-@item
-The Bash @code{type} builtin is more extensive and gives more information
-about the names it finds (@pxref{Bash Builtins}).
-
-@item
-The Bash @code{umask} builtin permits a @option{-p} option to cause
-the output to be displayed in the form of a @code{umask} command
-that may be reused as input (@pxref{Bourne Shell Builtins}).
-
-@item
-Bash implements a @code{csh}-like directory stack, and provides the
-@code{pushd}, @code{popd}, and @code{dirs} builtins to manipulate it
-(@pxref{The Directory Stack}).
-Bash also makes the directory stack visible as the value of the
-@env{DIRSTACK} shell variable.
-
-@item
-Bash interprets special backslash-escaped characters in the prompt
-strings when interactive (@pxref{Printing a Prompt}).
-
-@item
-The Bash restricted mode is more useful (@pxref{The Restricted Shell});
-the SVR4.2 shell restricted mode is too limited.
-
-@item
-The @code{disown} builtin can remove a job from the internal shell
-job table (@pxref{Job Control Builtins}) or suppress the sending
-of @code{SIGHUP} to a job when the shell exits as the result of a
-@code{SIGHUP}.
-
-@item
-Bash includes a number of features to support a separate debugger for
-shell scripts.
-
-@item
-The SVR4.2 shell has two privilege-related builtins
-(@code{mldmode} and @code{priv}) not present in Bash.
-
-@item
-Bash does not have the @code{stop} or @code{newgrp} builtins.
-
-@item
-Bash does not use the @env{SHACCT} variable or perform shell accounting.
-
-@item
-The SVR4.2 @code{sh} uses a @env{TIMEOUT} variable like Bash uses
-@env{TMOUT}.
-
-@end itemize
-
-@noindent
-More features unique to Bash may be found in @ref{Bash Features}.
-
-
-@appendixsec Implementation Differences From The SVR4.2 Shell
-
-Since Bash is a completely new implementation, it does not suffer from
-many of the limitations of the SVR4.2 shell. For instance:
-
-@itemize @bullet
-
-@item
-Bash does not fork a subshell when redirecting into or out of
-a shell control structure such as an @code{if} or @code{while}
-statement.
-
-@item
-Bash does not allow unbalanced quotes. The SVR4.2 shell will silently
-insert a needed closing quote at @code{EOF} under certain circumstances.
-This can be the cause of some hard-to-find errors.
-
-@item
-The SVR4.2 shell uses a baroque memory management scheme based on
-trapping @code{SIGSEGV}. If the shell is started from a process with
-@code{SIGSEGV} blocked (e.g., by using the @code{system()} C library
-function call), it misbehaves badly.
-
-@item
-In a questionable attempt at security, the SVR4.2 shell,
-when invoked without the @option{-p} option, will alter its real
-and effective @sc{uid} and @sc{gid} if they are less than some
-magic threshold value, commonly 100.
-This can lead to unexpected results.
-
-@item
-The SVR4.2 shell does not allow users to trap @code{SIGSEGV},
-@code{SIGALRM}, or @code{SIGCHLD}.
-
-@item
-The SVR4.2 shell does not allow the @env{IFS}, @env{MAILCHECK},
-@env{PATH}, @env{PS1}, or @env{PS2} variables to be unset.
-
-@item
-The SVR4.2 shell treats @samp{^} as the undocumented equivalent of
-@samp{|}.
-
-@item
-Bash allows multiple option arguments when it is invoked (@code{-x -v});
-the SVR4.2 shell allows only one option argument (@code{-xv}). In
-fact, some versions of the shell dump core if the second argument begins
-with a @samp{-}.
-
-@item
-The SVR4.2 shell exits a script if any builtin fails; Bash exits
-a script only if one of the @sc{posix} special builtins fails, and
-only for certain failures, as enumerated in the @sc{posix} standard.
-
-@item
-The SVR4.2 shell behaves differently when invoked as @code{jsh}
-(it turns on job control).
-@end itemize
-
-@node GNU Free Documentation License
-@appendix GNU Free Documentation License
-
-@include fdl.texi
-
-@node Indexes
-@appendix Indexes
-
-@menu
-* Builtin Index:: Index of Bash builtin commands.
-* Reserved Word Index:: Index of Bash reserved words.
-* Variable Index:: Quick reference helps you find the
- variable you want.
-* Function Index:: Index of bindable Readline functions.
-* Concept Index:: General index for concepts described in
- this manual.
-@end menu
-
-@node Builtin Index
-@appendixsec Index of Shell Builtin Commands
-@printindex bt
-
-@node Reserved Word Index
-@appendixsec Index of Shell Reserved Words
-@printindex rw
-
-@node Variable Index
-@appendixsec Parameter and Variable Index
-@printindex vr
-
-@node Function Index
-@appendixsec Function Index
-@printindex fn
-
-@node Concept Index
-@appendixsec Concept Index
-@printindex cp
-
-@bye
+++ /dev/null
-@ignore
-Copyright (C) 1988-2011 Free Software Foundation, Inc.
-@end ignore
-
-@set LASTCHANGE Mon May 9 12:23:18 EDT 2011
-
-@set EDITION 4.2
-@set VERSION 4.2
-@set UPDATED 9 May 2011
-@set UPDATED-MONTH May 2011
+++ /dev/null
-#
-# Simple makefile for the sample loadable builtins
-#
-# Copyright (C) 1996 Free Software Foundation, Inc.
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA.
-
-# Include some boilerplate Gnu makefile definitions.
-prefix = @prefix@
-
-exec_prefix = @exec_prefix@
-bindir = @bindir@
-libdir = @libdir@
-infodir = @infodir@
-includedir = @includedir@
-
-topdir = @top_srcdir@
-BUILD_DIR = @BUILD_DIR@
-srcdir = @srcdir@
-VPATH = .:@srcdir@
-
-@SET_MAKE@
-CC = @CC@
-RM = rm -f
-
-SHELL = @MAKE_SHELL@
-
-host_os = @host_os@
-host_cpu = @host_cpu@
-host_vendor = @host_vendor@
-
-CFLAGS = @CFLAGS@
-LOCAL_CFLAGS = @LOCAL_CFLAGS@
-DEFS = @DEFS@
-LOCAL_DEFS = @LOCAL_DEFS@
-
-CPPFLAGS = @CPPFLAGS@
-
-BASHINCDIR = ${topdir}/include
-
-LIBBUILD = ${BUILD_DIR}/lib
-
-INTL_LIBSRC = ${topdir}/lib/intl
-INTL_BUILDDIR = ${LIBBUILD}/intl
-INTL_INC = @INTL_INC@
-LIBINTL_H = @LIBINTL_H@
-
-CCFLAGS = $(DEFS) $(LOCAL_DEFS) $(LOCAL_CFLAGS) $(CFLAGS)
-
-#
-# These values are generated for configure by ${topdir}/support/shobj-conf.
-# If your system is not supported by that script, but includes facilities for
-# dynamic loading of shared objects, please update the script and send the
-# changes to bash-maintainers@gnu.org.
-#
-SHOBJ_CC = @SHOBJ_CC@
-SHOBJ_CFLAGS = @SHOBJ_CFLAGS@
-SHOBJ_LD = @SHOBJ_LD@
-SHOBJ_LDFLAGS = @SHOBJ_LDFLAGS@
-SHOBJ_XLDFLAGS = @SHOBJ_XLDFLAGS@
-SHOBJ_LIBS = @SHOBJ_LIBS@
-SHOBJ_STATUS = @SHOBJ_STATUS@
-
-INC = -I. -I.. -I$(topdir) -I$(topdir)/lib -I$(topdir)/builtins \
- -I$(BASHINCDIR) -I$(BUILD_DIR) -I$(LIBBUILD) \
- -I$(BUILD_DIR)/builtins $(INTL_INC)
-
-.c.o:
- $(SHOBJ_CC) $(SHOBJ_CFLAGS) $(CCFLAGS) $(INC) -c -o $@ $<
-
-
-ALLPROG = print truefalse sleep pushd finfo logname basename dirname \
- tty pathchk tee head mkdir rmdir printenv id whoami \
- uname sync push ln unlink cut realpath getconf strftime
-OTHERPROG = necho hello cat
-
-all: $(SHOBJ_STATUS)
-
-supported: $(ALLPROG)
-others: $(OTHERPROG)
-
-unsupported:
- @echo "Your system (${host_os}) is not supported by the"
- @echo "${topdir}/support/shobj-conf script."
- @echo "If your operating system provides facilities for dynamic"
- @echo "loading of shared objects using the dlopen(3) interface,"
- @echo "please update the script and re-run configure.
- @echo "Please send the changes you made to bash-maintainers@gnu.org"
- @echo "for inclusion in future bash releases."
-
-everything: supported others
-
-print: print.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ print.o $(SHOBJ_LIBS)
-
-necho: necho.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ necho.o $(SHOBJ_LIBS)
-
-getconf: getconf.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ getconf.o $(SHOBJ_LIBS)
-
-hello: hello.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ hello.o $(SHOBJ_LIBS)
-
-truefalse: truefalse.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ truefalse.o $(SHOBJ_LIBS)
-
-sleep: sleep.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ sleep.o $(SHOBJ_LIBS)
-
-finfo: finfo.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ finfo.o $(SHOBJ_LIBS)
-
-cat: cat.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ cat.o $(SHOBJ_LIBS)
-
-logname: logname.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ logname.o $(SHOBJ_LIBS)
-
-basename: basename.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ basename.o $(SHOBJ_LIBS)
-
-dirname: dirname.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ dirname.o $(SHOBJ_LIBS)
-
-tty: tty.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ tty.o $(SHOBJ_LIBS)
-
-pathchk: pathchk.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ pathchk.o $(SHOBJ_LIBS)
-
-tee: tee.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ tee.o $(SHOBJ_LIBS)
-
-mkdir: mkdir.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ mkdir.o $(SHOBJ_LIBS)
-
-rmdir: rmdir.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ rmdir.o $(SHOBJ_LIBS)
-
-head: head.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ head.o $(SHOBJ_LIBS)
-
-printenv: printenv.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ printenv.o $(SHOBJ_LIBS)
-
-id: id.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ id.o $(SHOBJ_LIBS)
-
-whoami: whoami.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ whoami.o $(SHOBJ_LIBS)
-
-uname: uname.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ uname.o $(SHOBJ_LIBS)
-
-sync: sync.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ sync.o $(SHOBJ_LIBS)
-
-push: push.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ push.o $(SHOBJ_LIBS)
-
-ln: ln.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ ln.o $(SHOBJ_LIBS)
-
-unlink: unlink.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ unlink.o $(SHOBJ_LIBS)
-
-cut: cut.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ cut.o $(SHOBJ_LIBS)
-
-realpath: realpath.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ realpath.o $(SHOBJ_LIBS)
-
-strftime: strftime.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ strftime.o $(SHOBJ_LIBS)
-
-# pushd is a special case. We use the same source that the builtin version
-# uses, with special compilation options.
-#
-pushd.c: ${topdir}/builtins/pushd.def
- $(RM) $@
- ${BUILD_DIR}/builtins/mkbuiltins -D ${topdir}/builtins ${topdir}/builtins/pushd.def
-
-pushd.o: pushd.c
- $(RM) $@
- $(SHOBJ_CC) -DHAVE_CONFIG_H -DPUSHD_AND_POPD -DLOADABLE_BUILTIN $(SHOBJ_CFLAGS) $(CFLAGS) $(CPPFLAGS) $(INC) -c -o $@ $<
-
-pushd: pushd.o
- $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ pushd.o $(SHOBJ_LIBS)
-
-clean:
- $(RM) $(ALLPROG) $(OTHERPROG) *.o
- -( cd perl && ${MAKE} ${MFLAGS} $@ )
-
-mostlyclean: clean
- -( cd perl && ${MAKE} ${MFLAGS} $@ )
-
-distclean maintainer-clean: clean
- $(RM) Makefile pushd.c
- -( cd perl && ${MAKE} ${MFLAGS} $@ )
-
-print.o: print.c
-truefalse.o: truefalse.c
-sleep.o: sleep.c
-finfo.o: finfo.c
-logname.o: logname.c
-basename.o: basename.c
-dirname.o: dirname.c
-tty.o: tty.c
-pathchk.o: pathchk.c
-tee.o: tee.c
-head.o: head.c
-rmdir.o: rmdir.c
-necho.o: necho.c
-getconf.o: getconf.c
-hello.o: hello.c
-cat.o: cat.c
-printenv.o: printenv.c
-id.o: id.c
-whoami.o: whoami.c
-uname.o: uname.c
-sync.o: sync.c
-push.o: push.c
-mkdir.o: mkdir.c
-realpath.o: realpath.c
-strftime.o: strftime.c
+++ /dev/null
-/* mkdir - make directories */
-
-/* See Makefile for compilation details. */
-
-/*
- Copyright (C) 1999-2009 Free Software Foundation, Inc.
-
- This file is part of GNU Bash.
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include <config.h>
-
-#include "bashtypes.h"
-#include "posixstat.h"
-#include <errno.h>
-#include <stdio.h>
-#include "bashansi.h"
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include "builtins.h"
-#include "shell.h"
-#include "bashgetopt.h"
-#include "common.h"
-
-#if !defined (errno)
-extern int errno;
-#endif
-
-#define ISOCTAL(c) ((c) >= '0' && (c) <= '7')
-
-extern int parse_symbolic_mode ();
-
-static int make_path ();
-
-static int original_umask;
-
-int
-mkdir_builtin (list)
- WORD_LIST *list;
-{
- int opt, pflag, omode, rval, octal, nmode, parent_mode, um;
- char *mode;
- WORD_LIST *l;
-
- reset_internal_getopt ();
- pflag = 0;
- mode = (char *)NULL;
- while ((opt = internal_getopt(list, "m:p")) != -1)
- switch (opt)
- {
- case 'p':
- pflag = 1;
- break;
- case 'm':
- mode = list_optarg;
- break;
- default:
- builtin_usage();
- return (EX_USAGE);
- }
- list = loptend;
-
- if (list == 0)
- {
- builtin_usage ();
- return (EX_USAGE);
- }
-
- if (mode == NULL)
- omode = S_IRWXU | S_IRWXG | S_IRWXO; /* a=rwx */
- else if (ISOCTAL (*mode)) /* octal number */
- {
- omode = read_octal (mode);
- if (omode < 0)
- {
- builtin_error ("invalid file mode: %s", mode);
- return (EXECUTION_FAILURE);
- }
- octal = 1;
- }
- else if (mode)
- {
- /* initial bits are a=rwx; the mode argument modifies them */
- omode = parse_symbolic_mode (mode, S_IRWXU | S_IRWXG | S_IRWXO);
- if (omode < 0)
- {
- builtin_error ("invalid file mode: %s", mode);
- return (EXECUTION_FAILURE);
- }
- octal = 0;
- }
-
- /* Make the new mode */
- original_umask = umask (0);
- umask (original_umask);
-
- nmode = (S_IRWXU | S_IRWXG | S_IRWXO) & ~original_umask;
- parent_mode = nmode | (S_IWRITE|S_IEXEC); /* u+wx */
-
- /* Adjust new mode based on mode argument */
- nmode &= omode;
-
- for (rval = EXECUTION_SUCCESS, l = list; l; l = l->next)
- {
- if (pflag && make_path (l->word->word, nmode, parent_mode))
- {
- rval = EXECUTION_FAILURE;
- continue;
- }
- else if (pflag == 0 && mkdir (l->word->word, nmode) < 0)
- {
- builtin_error ("cannot create directory `%s': %s", l->word->word, strerror (errno));
- rval = EXECUTION_FAILURE;
- }
- }
- return rval;
-}
-
-/* Make all the directories leading up to PATH, then create PATH. Note that
- this changes the process's umask; make sure that all paths leading to a
- return reset it to ORIGINAL_UMASK */
-static int
-make_path (path, nmode, parent_mode)
- char *path;
- int nmode, parent_mode;
-{
- int oumask;
- struct stat sb;
- char *p, *npath;
-
- if (stat (path, &sb) == 0)
- {
- if (S_ISDIR (sb.st_mode) == 0)
- {
- builtin_error ("`%s': file exists but is not a directory", path);
- return 1;
- }
-
- if (chmod (path, nmode))
- {
- builtin_error ("%s: %s", path, strerror (errno));
- return 1;
- }
-
- return 0;
- }
-
- oumask = umask (0);
- npath = savestring (path); /* So we can write to it. */
-
- /* Check whether or not we need to do anything with intermediate dirs. */
-
- /* Skip leading slashes. */
- p = npath;
- while (*p == '/')
- p++;
-
- while (p = strchr (p, '/'))
- {
- *p = '\0';
- if (stat (npath, &sb) != 0)
- {
- if (mkdir (npath, parent_mode))
- {
- builtin_error ("cannot create directory `%s': %s", npath, strerror (errno));
- umask (original_umask);
- free (npath);
- return 1;
- }
- }
- else if (S_ISDIR (sb.st_mode) == 0)
- {
- builtin_error ("`%s': file exists but is not a directory", npath);
- umask (original_umask);
- free (npath);
- return 1;
- }
-
- *p++ = '/'; /* restore slash */
- while (*p == '/')
- p++;
- }
-
- /* Create the final directory component. */
- if (stat (npath, &sb) && mkdir (npath, nmode))
- {
- builtin_error ("cannot create directory `%s': %s", npath, strerror (errno));
- umask (original_umask);
- free (npath);
- return 1;
- }
-
- umask (original_umask);
- free (npath);
- return 0;
-}
-
-char *mkdir_doc[] = {
- "Create directories.",
- "",
- "Make directories. Create the directories named as arguments, in",
- "the order specified, using mode rwxrwxrwx as modified by the current",
- "umask (see `help umask'). The -m option causes the file permission",
- "bits of the final directory to be MODE. The MODE argument may be",
- "an octal number or a symbolic mode like that used by chmod(1). If",
- "a symbolic mode is used, the operations are interpreted relative to",
- "an initial mode of \"a=rwx\". The -p option causes any required",
- "intermediate directories in PATH to be created. The directories",
- "are created with permssion bits of rwxrwxrwx as modified by the current",
- "umask, plus write and search permissions for the owner. mkdir",
- "returns 0 if the directories are created successfully, and non-zero",
- "if an error occurs.",
- (char *)NULL
-};
-
-struct builtin mkdir_struct = {
- "mkdir",
- mkdir_builtin,
- BUILTIN_ENABLED,
- mkdir_doc,
- "mkdir [-p] [-m mode] directory [directory ...]",
- 0
-};
+++ /dev/null
-#!/bin/bash
-# ash -- "Adventure shell"
-# last edit: 86/04/21 D A Gwyn
-# SCCS ID: @(#)ash.sh 1.4
-
-OPATH=$PATH
-
-ask()
-{
- echo -n "$@" '[y/n] '
- read ans
-
- case "$ans" in
- y*|Y*)
- return 0
- ;;
- *)
- return 1
- ;;
- esac
-}
-
-CAT=${PAGER:-more}
-
-ash_inst()
-{
- cat <<- EOF
-
- Instructions for the Adventure shell
-
- Welcome to the Adventure shell! In this exploration of the UNIX file
- system, I will act as your eyes and hands. As you move around, I will
- describe whatever is visible and will carry out your commands. The
- general form of a command is
- Verb Object Extra_stuff.
- Most commands pay no attention to the "Extra_stuff", and many do not
- need an "Object". A typical command is
- get all
- which picks up all files in the current "room" (directory). You can
- find out what you are carrying by typing the command
- inventory
- The command "help" results in a full description of all commands that I
- understand. To quit the Adventure shell, type
- quit
-
- There are UNIX monsters lurking in the background. These are also
- known as "commands with arguments".
-
- Good luck!
- EOF
-}
-
-ash_help()
-{
-echo "I understand the following commands (synonyms in parentheses):"
-echo ""
-
-echo "change OBJECT to NEW_NAME changes the name of the object"
-echo "clone OBJECT as NEW_NAME duplicates the object"
-echo "drop OBJECTS leaves the objects in the room"
-echo "enter (go) PASSAGE takes the labeled passage"
-echo "examine OBJECTS describes the objects in detail"
-echo "feed OBJECT to MONSTER stuffs the object into a UNIX monster"
-echo "get (take) OBJECTS picks up the specified objects"
-echo "gripe (bug) report a problem with the Adventure shell"
-echo "help prints this summary"
-echo "inventory (i) tells what you are carrying"
-echo "kill (destroy) OBJECTS destroys the objects"
-echo "look (l) describes the room, including hidden objects"
-echo "open (read) OBJECT shows the contents of an object"
-echo "quit (exit) leaves the Adventure shell"
-echo "resurrect OBJECTS attempts to restore dead objects"
-echo "steal OBJECT from MONSTER obtains the object from a UNIX monster"
-echo "throw OBJECT at daemon feeds the object to the printer daemon"
-echo "up takes the overhead passage"
-echo "wake MONSTER awakens a UNIX monster"
-echo "where (w) tells you where you are"
-echo "xyzzy moves you to your home"
-}
-
-MAINT=chet@ins.cwru.edu
-
-PATH=/usr/ucb:/bin:/usr/bin:/usr/local/bin:.
-export PATH
-
-trap 'echo Ouch!' 2 3
-#trap '' 18 # disable Berkeley job control
-
-ash_lk(){ echo " $1 " | fgrep " $2 " >&- 2>&-; }
-ash_pr(){ echo $* | tr ' ' '\012' | pr -5 -t -w75 -l$[ ( $# + 4 ) / 5 ]; }
-ash_rm(){ echo " $1 " | sed -e "s/ $2 / /" -e 's/^ //' -e 's/ $//'; }
-
-# enable history, bang history expansion, and emacs editing
-set -o history
-set -o histexpand
-set -o emacs
-
-cd
-LIM=.limbo # $HOME/$LIM contains "destroyed" objects
-mkdir $LIM >&- 2>&-
-KNAP=.knapsack # $HOME/$KNAP contains objects being "carried"
-if [ ! -d $KNAP ]
-then mkdir $KNAP >&- 2>&-
- if [ $? = 0 ]
- then echo 'You found a discarded empty knapsack.'
- else echo 'You have no knapsack to carry things in.'
- exit 1
- fi
-else echo 'One moment while I peek in your old knapsack...'
-fi
-
-kn=`echo \`ls -a $KNAP | sed -e '/^\.$/d' -e '/^\.\.$/d'\``
-
-if ask 'Welcome to the Adventure shell! Do you need instructions?'
-then
- ash_inst
- echo -n 'Type a newline to continue: '
- read
-fi
-
-wiz=false
-cha=false
-prev=$LIM
-while :
-do room=`pwd`
- if [ $room != $prev ]
- then if [ $room = $HOME ]
- then echo 'You are in your own home.'
- else echo "You have entered $room."
- fi
- exs=
- obs=
- hexs=
- hobs=
- f=false
- for i in `ls -a`
- do case $i in
- .|..) ;;
- .*) if [ -f $i ]
- then hobs="$hobs $i"
- elif [ -d $i ]
- then hexs="$hexs $i"
- else f=true
- fi
- ;;
- *) if [ -f $i ]
- then obs="$obs $i"
- elif [ -d $i ]
- then exs="$exs $i"
- else f=true
- fi
- ;;
- esac
- done
- if [ "$obs" ]
- then echo 'This room contains:'
- ash_pr $obs
- else echo 'The room looks empty.'
- fi
- if [ "$exs" ]
- then echo 'There are exits labeled:'
- ash_pr $exs
- echo 'as well as a passage overhead.'
- else echo 'There is a passage overhead.'
- fi
- if sh -c $f
- then echo 'There are shadowy figures in the corner.'
- fi
- prev=$room
- fi
-
- read -e -p '-advsh> ' verb obj x # prompt is '-advsh> '
- if [ $? != 0 ]
- then verb=quit # EOF
- fi
-
- case $verb in
- change) if [ "$obj" ]
- then if ash_lk "$obs $hobs" "$obj"
- then set -- $x
- case "$1" in
- to) if [ "$2" ]
- then if [ -f $2 ]
- then echo "You must destroy $2 first."
- set --
- fi
- if [ "$2" ]
- then if mv $obj $2 >&- 2>&-
- then echo "The $obj shimmers and turns into $2."
- obs=`ash_rm "$2 $obs" "$obj"`
- else echo "There is a cloud of smoke but the $obj is unchanged."
- fi
- fi
- else echo 'To what?'
- fi
- ;;
- *) echo "Change $obj to what?"
- ;;
- esac
- else if ash_lk "$kn" "$obj"
- then echo 'You must drop it first.'
- else echo "I see no $obj here."
- fi
- fi
- else echo 'Change what?'
- fi
- ;;
- clone) if [ "$obj" ]
- then if ash_lk "$obs $hobs" "$obj"
- then if [ ! -r $obj ]
- then echo "The $obj does not wish to be cloned."
- else set -- $x
- case "$1" in
- as) if [ "$2" ]
- then if [ -f $2 ]
- then echo "You must destroy $2 first."
- else if cp $obj $2 >&- 2>&-
- then echo "Poof! When the smoke clears, you see the new $2."
- obs="$obs $2"
- else echo 'You hear a dull thud but no clone appears.'
- fi
- fi
- else echo 'As what?'
- fi
- ;;
- *) echo "Clone $obj as what?"
- ;;
- esac
- fi
- else if ash_lk "$kn" "$obj"
- then echo 'You must drop it first.'
- else echo "I see no $obj here."
- fi
- fi
- else echo 'Clone what?'
- fi
- ;;
- drop) if [ "$obj" ]
- then for it in $obj $x
- do if ash_lk "$kn" "$it"
- then if [ -w $it ]
- then echo "You must destroy $it first."
- else if mv $HOME/$KNAP/$it $it >&- 2>&-
- then echo "$it: dropped."
- kn=`ash_rm "$kn" "$it"`
- obs=`echo $it $obs`
- else echo "The $it is caught in your knapsack."
- fi
- fi
- else echo "You're not carrying the $it!"
- fi
- done
- else echo 'Drop what?'
- fi
- ;;
- enter|go) if [ "$obj" ]
- then if [ $obj != up ]
- then if ash_lk "$exs $hexs" "$obj"
- then if [ -x $obj ]
- then if cd $obj
- then echo 'You squeeze through the passage.'
- else echo "You can't go that direction."
- fi
- else echo 'An invisible force blocks your way.'
- fi
- else echo 'I see no such passage.'
- fi
- else if cd ..
- then echo 'You struggle upwards.'
- else echo "You can't reach that high."
- fi
- fi
- else echo 'Which passage?'
- fi
- ;;
- examine) if [ "$obj" ]
- then if [ $obj = all ]
- then $obj=`echo $obs $exs`
- x=
- fi
- for it in $obj $x
- do if ash_lk "$obs $hobs $exs $hexs" "$it"
- then echo "Upon close inspection of the $it, you see:"
- ls -ld $it 2>&-
- if [ $? != 0 ]
- then echo "-- when you look directly at the $it, it vanishes."
- fi
- else if ash_lk "$kn" "$it"
- then echo 'You must drop it first.'
- else echo "I see no $it here."
- fi
- fi
- done
- else echo 'Examine what?'
- fi
- ;;
- feed) if [ "$obj" ]
- then if ash_lk "$obs $hobs" "$obj"
- then set -- $x
- case "$1" in
- to) if [ "$2" ]
- then shift
- if PATH=$OPATH $* <$obj 2>&-
- then echo "The $1 monster devours your $obj."
- if rm -f $obj >&- 2>&-
- then obs=`ash_rm "$obs" "$obj"`
- else echo 'But he spits it back up.'
- fi
- else echo "The $1 monster holds his nose in disdain."
- fi
- else echo 'To what?'
- fi
- ;;
- *) echo "Feed $obj to what?"
- ;;
- esac
- else if ash_lk "$kn" "$obj"
- then echo 'You must drop it first.'
- else echo "I see no $obj here."
- fi
- fi
- else echo 'Feed what?'
- fi
- ;;
- get|take) if [ "$obj" ]
- then if [ $obj = all ]
- then obj="$obs"
- x=
- fi
- for it in $obj $x
- do if ash_lk "$obs $hobs" "$it"
- then if ash_lk "$kn" "$it"
- then echo 'You already have one.'
- else if mv $it $HOME/$KNAP/$it >&- 2>&-
- then echo "$it: taken."
- kn="$it $kn"
- obs=`ash_rm "$obs" "$it"`
- else echo "The $it is too heavy."
- fi
- fi
- else echo "I see no $it here."
- fi
- done
- else echo 'Get what?'
- fi
- ;;
- gripe|bug) echo 'Please describe the problem and your situation at the time it failed.\nEnd the bug report with a line containing just a Ctrl-D.'
- cat | mail $MAINT -s 'ash bug'
- echo 'Thank you!'
- ;;
- help) ash_help
- ;;
- inventory|i) if [ "$kn" ]
- then echo 'Your knapsack contains:'
- ash_pr $kn
- else echo 'You are poverty-stricken.'
- fi
- ;;
- kill|destroy) if [ "$obj" ]
- then if [ $obj = all ]
- then x=
- if ask "Do you really want to attempt to $verb them all?"
- then obj=`echo $obs`
- else echo 'Chicken!'
- obj=
- fi
- fi
- for it in $obj $x
- do if ash_lk "$obs $hobs" "$it"
- then if mv $it $HOME/$LIM <&- >&- 2>&-
- then if [ $verb = kill ]
- then echo "The $it cannot defend himself; he dies."
- else echo "You have destroyed the $it; it vanishes."
- fi
- obs=`ash_rm "$obs" "$it"`
- else if [ $verb = kill ]
- then echo "Your feeble blows are no match for the $it."
- else echo "The $it is indestructible."
- fi
- fi
- else if ash_lk "$kn" "$it"
- then echo "You must drop the $it first."
- found=false
- else echo "I see no $it here."
- fi
- fi
- done
- else echo 'Kill what?'
- fi
- ;;
- look|l) obs=`echo $obs $hobs`
- hobs=
- if [ "$obs" ]
- then echo 'The room contains:'
- ash_pr $obs
- else echo 'The room is empty.'
- fi
- exs=`echo $exs $hexs`
- hexs=
- if [ "$exs" ]
- then echo 'There are exits plainly labeled:'
- ash_pr $exs
- echo 'and a passage directly overhead.'
- else echo 'The only exit is directly overhead.'
- fi
- ;;
- magic) if [ "$obj" = mode ]
- then if sh -c $cha
- then echo 'You had your chance and you blew it.'
- else if ask 'Are you a wizard?'
- then echo -n 'Prove it! Say the magic word: '
- read obj
- if [ "$obj" = armadillo ]
- then echo 'Yes, master!!'
- wiz=true
- else echo "Homie says: I don't think so"
- cha=true
- fi
- else echo "I didn't think so."
- fi
- fi
- else echo 'Nice try.'
- fi
- ;;
- open|read) if [ "$obj" ]
- then if ash_lk "$obs $hobs" "$obj"
- then if [ -r $obj ]
- then if [ -s $obj ]
- then echo "Opening the $obj reveals:"
- $CAT < $obj
- if [ $? != 0 ]
- then echo '-- oops, you lost the contents!'
- fi
- else echo "There is nothing inside the $obj."
- fi
- else echo "You do not have the proper tools to open the $obj."
- fi
- else if ash_lk "$kn" "$obj"
- then echo 'You must drop it first.'
- found=false
- else echo "I see no $obj here."
- fi
- fi
- else echo 'Open what?'
- fi
- ;;
- quit|exit) if ask 'Do you really want to quit now?'
- then if [ "$kn" ]
- then echo 'The contents of your knapsack will still be there next time.'
- fi
- rm -rf $HOME/$LIM
- echo 'See you later!'
- exit 0
- fi
- ;;
- resurrect) if [ "$obj" ]
- then for it in $obj $x
- do if ash_lk "$obs $hobs" "$it"
- then echo "The $it is already alive and well."
- else if mv $HOME/$LIM/$it $it <&- >&- 2>&-
- then echo "The $it staggers to his feet."
- obs=`echo $it $obs`
- else echo "There are sparks but no $it appears."
- fi
- fi
- done
- else echo 'Resurrect what?'
- fi
- ;;
- steal) if [ "$obj" ]
- then if ash_lk "$obs $hobs" "$obj"
- then echo 'There is already one here.'
- else set -- $x
- case "$1" in
- from) if [ "$2" ]
- then shift
- if PATH=$OPATH $* >$obj 2>&-
- then echo "The $1 monster drops the $obj."
- obs=`echo $obj $obs`
- else echo "The $1 monster runs away as you approach."
- rm -f $obj >&- 2>&-
- fi
- else echo 'From what?'
- fi
- ;;
- *) echo "Steal $obj from what?"
- ;;
- esac
- fi
- else echo 'Steal what?'
- fi
- ;;
- throw) if [ "$obj" ]
- then if ash_lk "$obs $hobs" "$obj"
- then set -- $x
- case "$1" in
- at) case "$2" in
- daemon) if sh -c "lpr -r $obj"
- then echo "The daemon catches the $obj, turns it into paper,\nand leaves it in the basket."
- obs=`ash_rm "$obs" "$obj"`
- else echo "The daemon is nowhere to be found."
- fi
- ;;
- *) echo 'At what?'
- ;;
- esac
- ;;
- *) echo "Throw $obj at what?"
- ;;
- esac
- else if ash_lk "$kn" "$obj"
- then echo 'It is in your knapsack.'
- found=false
- else echo "I see no $obj here."
- fi
- fi
- else echo 'Throw what?'
- fi
- ;;
- u|up) if cd ..
- then echo 'You pull yourself up a level.'
- else echo "You can't reach that high."
- fi
- ;;
- wake) if [ "$obj" ]
- then echo "You awaken the $obj monster:"
- PATH=$OPATH $obj $x
- echo 'The monster slithers back into the darkness.'
- else echo 'Wake what?'
- fi
- ;;
- w|where) echo "You are in $room."
- ;;
- xyzzy) if cd
- then echo 'A strange feeling comes over you.'
- else echo 'Your spell fizzles out.'
- fi
- ;;
- *) if [ "$verb" ]
- then if sh -c $wiz
- then PATH=$OPATH $verb $obj $x
- else echo "I don't know how to \"$verb\"."
- echo 'Type "help" for assistance.'
- fi
- else echo 'Say something!'
- fi
- ;;
- esac
-done
+++ /dev/null
-/* execute_cmd.c -- Execute a COMMAND structure. */
-
-/* Copyright (C) 1987-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#if !defined (__GNUC__) && !defined (HAVE_ALLOCA_H) && defined (_AIX)
- #pragma alloca
-#endif /* _AIX && RISC6000 && !__GNUC__ */
-
-#include <stdio.h>
-#include "chartypes.h"
-#include "bashtypes.h"
-#if !defined (_MINIX) && defined (HAVE_SYS_FILE_H)
-# include <sys/file.h>
-#endif
-#include "filecntl.h"
-#include "posixstat.h"
-#include <signal.h>
-#ifndef _MINIX
-# include <sys/param.h>
-#endif
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include "posixtime.h"
-
-#if defined (HAVE_SYS_RESOURCE_H) && !defined (RLIMTYPE)
-# include <sys/resource.h>
-#endif
-
-#if defined (HAVE_SYS_TIMES_H) && defined (HAVE_TIMES)
-# include <sys/times.h>
-#endif
-
-#include <errno.h>
-
-#if !defined (errno)
-extern int errno;
-#endif
-
-#define NEED_FPURGE_DECL
-
-#include "bashansi.h"
-#include "bashintl.h"
-
-#include "memalloc.h"
-#include "shell.h"
-#include <y.tab.h> /* use <...> so we pick it up from the build directory */
-#include "flags.h"
-#include "builtins.h"
-#include "hashlib.h"
-#include "jobs.h"
-#include "execute_cmd.h"
-#include "findcmd.h"
-#include "redir.h"
-#include "trap.h"
-#include "pathexp.h"
-#include "hashcmd.h"
-
-#if defined (COND_COMMAND)
-# include "test.h"
-#endif
-
-#include "builtins/common.h"
-#include "builtins/builtext.h" /* list of builtins */
-
-#include <glob/strmatch.h>
-#include <tilde/tilde.h>
-
-#if defined (BUFFERED_INPUT)
-# include "input.h"
-#endif
-
-#if defined (ALIAS)
-# include "alias.h"
-#endif
-
-#if defined (HISTORY)
-# include "bashhist.h"
-#endif
-
-extern int dollar_dollar_pid;
-extern int posixly_correct;
-extern int expand_aliases;
-extern int autocd;
-extern int breaking, continuing, loop_level;
-extern int parse_and_execute_level, running_trap, sourcelevel;
-extern int command_string_index, line_number;
-extern int dot_found_in_search;
-extern int already_making_children;
-extern int tempenv_assign_error;
-extern char *the_printed_command, *shell_name;
-extern pid_t last_command_subst_pid;
-extern sh_builtin_func_t *last_shell_builtin, *this_shell_builtin;
-extern char **subshell_argv, **subshell_envp;
-extern int subshell_argc;
-extern time_t shell_start_time;
-#if 0
-extern char *glob_argv_flags;
-#endif
-
-extern int close __P((int));
-
-/* Static functions defined and used in this file. */
-static void close_pipes __P((int, int));
-static void do_piping __P((int, int));
-static void bind_lastarg __P((char *));
-static int shell_control_structure __P((enum command_type));
-static void cleanup_redirects __P((REDIRECT *));
-
-#if defined (JOB_CONTROL)
-static int restore_signal_mask __P((sigset_t *));
-#endif
-
-static void async_redirect_stdin __P((void));
-
-static int builtin_status __P((int));
-
-static int execute_for_command __P((FOR_COM *));
-#if defined (SELECT_COMMAND)
-static int displen __P((const char *));
-static int print_index_and_element __P((int, int, WORD_LIST *));
-static void indent __P((int, int));
-static void print_select_list __P((WORD_LIST *, int, int, int));
-static char *select_query __P((WORD_LIST *, int, char *, int));
-static int execute_select_command __P((SELECT_COM *));
-#endif
-#if defined (DPAREN_ARITHMETIC)
-static int execute_arith_command __P((ARITH_COM *));
-#endif
-#if defined (COND_COMMAND)
-static int execute_cond_node __P((COND_COM *));
-static int execute_cond_command __P((COND_COM *));
-#endif
-#if defined (COMMAND_TIMING)
-static int mkfmt __P((char *, int, int, time_t, int));
-static void print_formatted_time __P((FILE *, char *,
- time_t, int, time_t, int,
- time_t, int, int));
-static int time_command __P((COMMAND *, int, int, int, struct fd_bitmap *));
-#endif
-#if defined (ARITH_FOR_COMMAND)
-static intmax_t eval_arith_for_expr __P((WORD_LIST *, int *));
-static int execute_arith_for_command __P((ARITH_FOR_COM *));
-#endif
-static int execute_case_command __P((CASE_COM *));
-static int execute_while_command __P((WHILE_COM *));
-static int execute_until_command __P((WHILE_COM *));
-static int execute_while_or_until __P((WHILE_COM *, int));
-static int execute_if_command __P((IF_COM *));
-static int execute_null_command __P((REDIRECT *, int, int, int));
-static void fix_assignment_words __P((WORD_LIST *));
-static int execute_simple_command __P((SIMPLE_COM *, int, int, int, struct fd_bitmap *));
-static int execute_builtin __P((sh_builtin_func_t *, WORD_LIST *, int, int));
-static int execute_function __P((SHELL_VAR *, WORD_LIST *, int, struct fd_bitmap *, int, int));
-static int execute_builtin_or_function __P((WORD_LIST *, sh_builtin_func_t *,
- SHELL_VAR *,
- REDIRECT *, struct fd_bitmap *, int));
-static void execute_subshell_builtin_or_function __P((WORD_LIST *, REDIRECT *,
- sh_builtin_func_t *,
- SHELL_VAR *,
- int, int, int,
- struct fd_bitmap *,
- int));
-static int execute_disk_command __P((WORD_LIST *, REDIRECT *, char *,
- int, int, int, struct fd_bitmap *, int));
-
-static char *getinterp __P((char *, int, int *));
-static void initialize_subshell __P((void));
-static int execute_in_subshell __P((COMMAND *, int, int, int, struct fd_bitmap *));
-#if defined (COPROCESS_SUPPORT)
-static int execute_coproc __P((COMMAND *, int, int, struct fd_bitmap *));
-#endif
-
-static int execute_pipeline __P((COMMAND *, int, int, int, struct fd_bitmap *));
-
-static int execute_connection __P((COMMAND *, int, int, int, struct fd_bitmap *));
-
-static int execute_intern_function __P((WORD_DESC *, COMMAND *));
-
-/* Set to 1 if fd 0 was the subject of redirection to a subshell. Global
- so that reader_loop can set it to zero before executing a command. */
-int stdin_redir;
-
-/* The name of the command that is currently being executed.
- `test' needs this, for example. */
-char *this_command_name;
-
-/* The printed representation of the currently-executing command (same as
- the_printed_command), except when a trap is being executed. Useful for
- a debugger to know where exactly the program is currently executing. */
-char *the_printed_command_except_trap;
-
-/* For catching RETURN in a function. */
-int return_catch_flag;
-int return_catch_value;
-procenv_t return_catch;
-
-/* The value returned by the last synchronous command. */
-int last_command_exit_value;
-
-/* Whether or not the last command (corresponding to last_command_exit_value)
- was terminated by a signal, and, if so, which one. */
-int last_command_exit_signal;
-
-/* The list of redirections to perform which will undo the redirections
- that I made in the shell. */
-REDIRECT *redirection_undo_list = (REDIRECT *)NULL;
-
-/* The list of redirections to perform which will undo the internal
- redirections performed by the `exec' builtin. These are redirections
- that must be undone even when exec discards redirection_undo_list. */
-REDIRECT *exec_redirection_undo_list = (REDIRECT *)NULL;
-
-/* When greater than zero, value is the `level' of builtins we are
- currently executing (e.g. `eval echo a' would have it set to 2). */
-int executing_builtin = 0;
-
-/* Non-zero if we are executing a command list (a;b;c, etc.) */
-int executing_list = 0;
-
-/* Non-zero if failing commands in a command substitution should not exit the
- shell even if -e is set. Used to pass the CMD_IGNORE_RETURN flag down to
- commands run in command substitutions by parse_and_execute. */
-int comsub_ignore_return = 0;
-
-/* Non-zero if we have just forked and are currently running in a subshell
- environment. */
-int subshell_environment;
-
-/* Count of nested subshells, like SHLVL. Available via $BASH_SUBSHELL */
-int subshell_level = 0;
-
-/* Currently-executing shell function. */
-SHELL_VAR *this_shell_function;
-
-/* If non-zero, matches in case and [[ ... ]] are case-insensitive */
-int match_ignore_case = 0;
-
-int executing_command_builtin = 0;
-
-struct stat SB; /* used for debugging */
-
-static int special_builtin_failed;
-
-static COMMAND *currently_executing_command;
-
-/* The line number that the currently executing function starts on. */
-static int function_line_number;
-
-/* XXX - set to 1 if we're running the DEBUG trap and we want to show the line
- number containing the function name. Used by executing_line_number to
- report the correct line number. Kind of a hack. */
-static int showing_function_line;
-
-static int line_number_for_err_trap;
-
-/* A sort of function nesting level counter */
-int funcnest = 0;
-int funcnest_max = 0; /* XXX - bash-4.2 */
-
-int lastpipe_opt = 0;
-
-struct fd_bitmap *current_fds_to_close = (struct fd_bitmap *)NULL;
-
-#define FD_BITMAP_DEFAULT_SIZE 32
-
-/* Functions to allocate and deallocate the structures used to pass
- information from the shell to its children about file descriptors
- to close. */
-struct fd_bitmap *
-new_fd_bitmap (size)
- int size;
-{
- struct fd_bitmap *ret;
-
- ret = (struct fd_bitmap *)xmalloc (sizeof (struct fd_bitmap));
-
- ret->size = size;
-
- if (size)
- {
- ret->bitmap = (char *)xmalloc (size);
- memset (ret->bitmap, '\0', size);
- }
- else
- ret->bitmap = (char *)NULL;
- return (ret);
-}
-
-void
-dispose_fd_bitmap (fdbp)
- struct fd_bitmap *fdbp;
-{
- FREE (fdbp->bitmap);
- free (fdbp);
-}
-
-void
-close_fd_bitmap (fdbp)
- struct fd_bitmap *fdbp;
-{
- register int i;
-
- if (fdbp)
- {
- for (i = 0; i < fdbp->size; i++)
- if (fdbp->bitmap[i])
- {
- close (i);
- fdbp->bitmap[i] = 0;
- }
- }
-}
-
-/* Return the line number of the currently executing command. */
-int
-executing_line_number ()
-{
- if (executing && showing_function_line == 0 &&
- (variable_context == 0 || interactive_shell == 0) &&
- currently_executing_command)
- {
-#if defined (COND_COMMAND)
- if (currently_executing_command->type == cm_cond)
- return currently_executing_command->value.Cond->line;
-#endif
-#if defined (DPAREN_ARITHMETIC)
- else if (currently_executing_command->type == cm_arith)
- return currently_executing_command->value.Arith->line;
-#endif
-#if defined (ARITH_FOR_COMMAND)
- else if (currently_executing_command->type == cm_arith_for)
- return currently_executing_command->value.ArithFor->line;
-#endif
-
- return line_number;
- }
- else
- return line_number;
-}
-
-/* Execute the command passed in COMMAND. COMMAND is exactly what
- read_command () places into GLOBAL_COMMAND. See "command.h" for the
- details of the command structure.
-
- EXECUTION_SUCCESS or EXECUTION_FAILURE are the only possible
- return values. Executing a command with nothing in it returns
- EXECUTION_SUCCESS. */
-int
-execute_command (command)
- COMMAND *command;
-{
- struct fd_bitmap *bitmap;
- int result;
-
- current_fds_to_close = (struct fd_bitmap *)NULL;
- bitmap = new_fd_bitmap (FD_BITMAP_DEFAULT_SIZE);
- begin_unwind_frame ("execute-command");
- add_unwind_protect (dispose_fd_bitmap, (char *)bitmap);
-
- /* Just do the command, but not asynchronously. */
- result = execute_command_internal (command, 0, NO_PIPE, NO_PIPE, bitmap);
-
- dispose_fd_bitmap (bitmap);
- discard_unwind_frame ("execute-command");
-
-#if defined (PROCESS_SUBSTITUTION)
- /* don't unlink fifos if we're in a shell function; wait until the function
- returns. */
- if (variable_context == 0)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
-
- QUIT;
- return (result);
-}
-
-/* Return 1 if TYPE is a shell control structure type. */
-static int
-shell_control_structure (type)
- enum command_type type;
-{
- switch (type)
- {
-#if defined (ARITH_FOR_COMMAND)
- case cm_arith_for:
-#endif
-#if defined (SELECT_COMMAND)
- case cm_select:
-#endif
-#if defined (DPAREN_ARITHMETIC)
- case cm_arith:
-#endif
-#if defined (COND_COMMAND)
- case cm_cond:
-#endif
- case cm_case:
- case cm_while:
- case cm_until:
- case cm_if:
- case cm_for:
- case cm_group:
- case cm_function_def:
- return (1);
-
- default:
- return (0);
- }
-}
-
-/* A function to use to unwind_protect the redirection undo list
- for loops. */
-static void
-cleanup_redirects (list)
- REDIRECT *list;
-{
- do_redirections (list, RX_ACTIVE);
- dispose_redirects (list);
-}
-
-#if 0
-/* Function to unwind_protect the redirections for functions and builtins. */
-static void
-cleanup_func_redirects (list)
- REDIRECT *list;
-{
- do_redirections (list, RX_ACTIVE);
-}
-#endif
-
-void
-dispose_exec_redirects ()
-{
- if (exec_redirection_undo_list)
- {
- dispose_redirects (exec_redirection_undo_list);
- exec_redirection_undo_list = (REDIRECT *)NULL;
- }
-}
-
-#if defined (JOB_CONTROL)
-/* A function to restore the signal mask to its proper value when the shell
- is interrupted or errors occur while creating a pipeline. */
-static int
-restore_signal_mask (set)
- sigset_t *set;
-{
- return (sigprocmask (SIG_SETMASK, set, (sigset_t *)NULL));
-}
-#endif /* JOB_CONTROL */
-
-#ifdef DEBUG
-/* A debugging function that can be called from gdb, for instance. */
-void
-open_files ()
-{
- register int i;
- int f, fd_table_size;
-
- fd_table_size = getdtablesize ();
-
- fprintf (stderr, "pid %ld open files:", (long)getpid ());
- for (i = 3; i < fd_table_size; i++)
- {
- if ((f = fcntl (i, F_GETFD, 0)) != -1)
- fprintf (stderr, " %d (%s)", i, f ? "close" : "open");
- }
- fprintf (stderr, "\n");
-}
-#endif
-
-static void
-async_redirect_stdin ()
-{
- int fd;
-
- fd = open ("/dev/null", O_RDONLY);
- if (fd > 0)
- {
- dup2 (fd, 0);
- close (fd);
- }
- else if (fd < 0)
- internal_error (_("cannot redirect standard input from /dev/null: %s"), strerror (errno));
-}
-
-#define DESCRIBE_PID(pid) do { if (interactive) describe_pid (pid); } while (0)
-
-/* Execute the command passed in COMMAND, perhaps doing it asynchrounously.
- COMMAND is exactly what read_command () places into GLOBAL_COMMAND.
- ASYNCHROUNOUS, if non-zero, says to do this command in the background.
- PIPE_IN and PIPE_OUT are file descriptors saying where input comes
- from and where it goes. They can have the value of NO_PIPE, which means
- I/O is stdin/stdout.
- FDS_TO_CLOSE is a list of file descriptors to close once the child has
- been forked. This list often contains the unusable sides of pipes, etc.
-
- EXECUTION_SUCCESS or EXECUTION_FAILURE are the only possible
- return values. Executing a command with nothing in it returns
- EXECUTION_SUCCESS. */
-int
-execute_command_internal (command, asynchronous, pipe_in, pipe_out,
- fds_to_close)
- COMMAND *command;
- int asynchronous;
- int pipe_in, pipe_out;
- struct fd_bitmap *fds_to_close;
-{
- int exec_result, user_subshell, invert, ignore_return, was_error_trap;
- REDIRECT *my_undo_list, *exec_undo_list;
- volatile int last_pid;
- volatile int save_line_number;
-
-#if 0
- if (command == 0 || breaking || continuing || read_but_dont_execute)
- return (EXECUTION_SUCCESS);
-#else
- if (breaking || continuing)
- return (last_command_exit_value);
- if (command == 0 || read_but_dont_execute)
- return (EXECUTION_SUCCESS);
-#endif
-
- QUIT;
- run_pending_traps ();
-
-#if 0
- if (running_trap == 0)
-#endif
- currently_executing_command = command;
-
- invert = (command->flags & CMD_INVERT_RETURN) != 0;
-
- /* If we're inverting the return value and `set -e' has been executed,
- we don't want a failing command to inadvertently cause the shell
- to exit. */
- if (exit_immediately_on_error && invert) /* XXX */
- command->flags |= CMD_IGNORE_RETURN; /* XXX */
-
- exec_result = EXECUTION_SUCCESS;
-
- /* If a command was being explicitly run in a subshell, or if it is
- a shell control-structure, and it has a pipe, then we do the command
- in a subshell. */
- if (command->type == cm_subshell && (command->flags & CMD_NO_FORK))
- return (execute_in_subshell (command, asynchronous, pipe_in, pipe_out, fds_to_close));
-
-#if defined (COPROCESS_SUPPORT)
- if (command->type == cm_coproc)
- return (execute_coproc (command, pipe_in, pipe_out, fds_to_close));
-#endif
-
- user_subshell = command->type == cm_subshell || ((command->flags & CMD_WANT_SUBSHELL) != 0);
-
- if (command->type == cm_subshell ||
- (command->flags & (CMD_WANT_SUBSHELL|CMD_FORCE_SUBSHELL)) ||
- (shell_control_structure (command->type) &&
- (pipe_out != NO_PIPE || pipe_in != NO_PIPE || asynchronous)))
- {
- pid_t paren_pid;
-
- /* Fork a subshell, turn off the subshell bit, turn off job
- control and call execute_command () on the command again. */
- line_number_for_err_trap = line_number;
- paren_pid = make_child (savestring (make_command_string (command)),
- asynchronous);
- if (paren_pid == 0)
- exit (execute_in_subshell (command, asynchronous, pipe_in, pipe_out, fds_to_close));
- /* NOTREACHED */
- else
- {
- close_pipes (pipe_in, pipe_out);
-
-#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
- unlink_fifo_list ();
-#endif
- /* If we are part of a pipeline, and not the end of the pipeline,
- then we should simply return and let the last command in the
- pipe be waited for. If we are not in a pipeline, or are the
- last command in the pipeline, then we wait for the subshell
- and return its exit status as usual. */
- if (pipe_out != NO_PIPE)
- return (EXECUTION_SUCCESS);
-
- stop_pipeline (asynchronous, (COMMAND *)NULL);
-
- if (asynchronous == 0)
- {
- was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0;
- invert = (command->flags & CMD_INVERT_RETURN) != 0;
- ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
-
- exec_result = wait_for (paren_pid);
-
- /* If we have to, invert the return value. */
- if (invert)
- exec_result = ((exec_result == EXECUTION_SUCCESS)
- ? EXECUTION_FAILURE
- : EXECUTION_SUCCESS);
-
- last_command_exit_value = exec_result;
- if (user_subshell && was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS)
- {
- save_line_number = line_number;
- line_number = line_number_for_err_trap;
- run_error_trap ();
- line_number = save_line_number;
- }
-
- if (user_subshell && ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS)
- {
- run_pending_traps ();
- jump_to_top_level (ERREXIT);
- }
-
- return (last_command_exit_value);
- }
- else
- {
- DESCRIBE_PID (paren_pid);
-
- run_pending_traps ();
-
- return (EXECUTION_SUCCESS);
- }
- }
- }
-
-#if defined (COMMAND_TIMING)
- if (command->flags & CMD_TIME_PIPELINE)
- {
- if (asynchronous)
- {
- command->flags |= CMD_FORCE_SUBSHELL;
- exec_result = execute_command_internal (command, 1, pipe_in, pipe_out, fds_to_close);
- }
- else
- {
- exec_result = time_command (command, asynchronous, pipe_in, pipe_out, fds_to_close);
-#if 0
- if (running_trap == 0)
-#endif
- currently_executing_command = (COMMAND *)NULL;
- }
- return (exec_result);
- }
-#endif /* COMMAND_TIMING */
-
- if (shell_control_structure (command->type) && command->redirects)
- stdin_redir = stdin_redirects (command->redirects);
-
- /* Handle WHILE FOR CASE etc. with redirections. (Also '&' input
- redirection.) */
- if (do_redirections (command->redirects, RX_ACTIVE|RX_UNDOABLE) != 0)
- {
- cleanup_redirects (redirection_undo_list);
- redirection_undo_list = (REDIRECT *)NULL;
- dispose_exec_redirects ();
- return (last_command_exit_value = EXECUTION_FAILURE);
- }
-
- if (redirection_undo_list)
- {
- /* XXX - why copy here? */
- my_undo_list = (REDIRECT *)copy_redirects (redirection_undo_list);
- dispose_redirects (redirection_undo_list);
- redirection_undo_list = (REDIRECT *)NULL;
- }
- else
- my_undo_list = (REDIRECT *)NULL;
-
- if (exec_redirection_undo_list)
- {
- /* XXX - why copy here? */
- exec_undo_list = (REDIRECT *)copy_redirects (exec_redirection_undo_list);
- dispose_redirects (exec_redirection_undo_list);
- exec_redirection_undo_list = (REDIRECT *)NULL;
- }
- else
- exec_undo_list = (REDIRECT *)NULL;
-
- if (my_undo_list || exec_undo_list)
- begin_unwind_frame ("loop_redirections");
-
- if (my_undo_list)
- add_unwind_protect ((Function *)cleanup_redirects, my_undo_list);
-
- if (exec_undo_list)
- add_unwind_protect ((Function *)dispose_redirects, exec_undo_list);
-
- ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
-
- QUIT;
-
- switch (command->type)
- {
- case cm_simple:
- {
- save_line_number = line_number;
- /* We can't rely on variables retaining their values across a
- call to execute_simple_command if a longjmp occurs as the
- result of a `return' builtin. This is true for sure with gcc. */
-#if defined (RECYCLES_PIDS)
- last_made_pid = NO_PID;
-#endif
- last_pid = last_made_pid;
- was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0;
-
- if (ignore_return && command->value.Simple)
- command->value.Simple->flags |= CMD_IGNORE_RETURN;
- if (command->flags & CMD_STDIN_REDIR)
- command->value.Simple->flags |= CMD_STDIN_REDIR;
-
- line_number_for_err_trap = line_number = command->value.Simple->line;
- exec_result =
- execute_simple_command (command->value.Simple, pipe_in, pipe_out,
- asynchronous, fds_to_close);
- line_number = save_line_number;
-
- /* The temporary environment should be used for only the simple
- command immediately following its definition. */
- dispose_used_env_vars ();
-
-#if (defined (ultrix) && defined (mips)) || defined (C_ALLOCA)
- /* Reclaim memory allocated with alloca () on machines which
- may be using the alloca emulation code. */
- (void) alloca (0);
-#endif /* (ultrix && mips) || C_ALLOCA */
-
- /* If we forked to do the command, then we must wait_for ()
- the child. */
-
- /* XXX - this is something to watch out for if there are problems
- when the shell is compiled without job control. */
- if (already_making_children && pipe_out == NO_PIPE &&
- last_made_pid != last_pid)
- {
- stop_pipeline (asynchronous, (COMMAND *)NULL);
-
- if (asynchronous)
- {
- DESCRIBE_PID (last_made_pid);
- }
- else
-#if !defined (JOB_CONTROL)
- /* Do not wait for asynchronous processes started from
- startup files. */
- if (last_made_pid != last_asynchronous_pid)
-#endif
- /* When executing a shell function that executes other
- commands, this causes the last simple command in
- the function to be waited for twice. This also causes
- subshells forked to execute builtin commands (e.g., in
- pipelines) to be waited for twice. */
- exec_result = wait_for (last_made_pid);
- }
- }
-
- /* 2009/02/13 -- pipeline failure is processed elsewhere. This handles
- only the failure of a simple command. */
- if (was_error_trap && ignore_return == 0 && invert == 0 && pipe_in == NO_PIPE && pipe_out == NO_PIPE && exec_result != EXECUTION_SUCCESS)
- {
- last_command_exit_value = exec_result;
- line_number = line_number_for_err_trap;
- run_error_trap ();
- line_number = save_line_number;
- }
-
- if (ignore_return == 0 && invert == 0 &&
- ((posixly_correct && interactive == 0 && special_builtin_failed) ||
- (exit_immediately_on_error && pipe_in == NO_PIPE && pipe_out == NO_PIPE && exec_result != EXECUTION_SUCCESS)))
- {
- last_command_exit_value = exec_result;
- run_pending_traps ();
- jump_to_top_level (ERREXIT);
- }
-
- break;
-
- case cm_for:
- if (ignore_return)
- command->value.For->flags |= CMD_IGNORE_RETURN;
- exec_result = execute_for_command (command->value.For);
- break;
-
-#if defined (ARITH_FOR_COMMAND)
- case cm_arith_for:
- if (ignore_return)
- command->value.ArithFor->flags |= CMD_IGNORE_RETURN;
- exec_result = execute_arith_for_command (command->value.ArithFor);
- break;
-#endif
-
-#if defined (SELECT_COMMAND)
- case cm_select:
- if (ignore_return)
- command->value.Select->flags |= CMD_IGNORE_RETURN;
- exec_result = execute_select_command (command->value.Select);
- break;
-#endif
-
- case cm_case:
- if (ignore_return)
- command->value.Case->flags |= CMD_IGNORE_RETURN;
- exec_result = execute_case_command (command->value.Case);
- break;
-
- case cm_while:
- if (ignore_return)
- command->value.While->flags |= CMD_IGNORE_RETURN;
- exec_result = execute_while_command (command->value.While);
- break;
-
- case cm_until:
- if (ignore_return)
- command->value.While->flags |= CMD_IGNORE_RETURN;
- exec_result = execute_until_command (command->value.While);
- break;
-
- case cm_if:
- if (ignore_return)
- command->value.If->flags |= CMD_IGNORE_RETURN;
- exec_result = execute_if_command (command->value.If);
- break;
-
- case cm_group:
-
- /* This code can be executed from either of two paths: an explicit
- '{}' command, or via a function call. If we are executed via a
- function call, we have already taken care of the function being
- executed in the background (down there in execute_simple_command ()),
- and this command should *not* be marked as asynchronous. If we
- are executing a regular '{}' group command, and asynchronous == 1,
- we must want to execute the whole command in the background, so we
- need a subshell, and we want the stuff executed in that subshell
- (this group command) to be executed in the foreground of that
- subshell (i.e. there will not be *another* subshell forked).
-
- What we do is to force a subshell if asynchronous, and then call
- execute_command_internal again with asynchronous still set to 1,
- but with the original group command, so the printed command will
- look right.
-
- The code above that handles forking off subshells will note that
- both subshell and async are on, and turn off async in the child
- after forking the subshell (but leave async set in the parent, so
- the normal call to describe_pid is made). This turning off
- async is *crucial*; if it is not done, this will fall into an
- infinite loop of executions through this spot in subshell after
- subshell until the process limit is exhausted. */
-
- if (asynchronous)
- {
- command->flags |= CMD_FORCE_SUBSHELL;
- exec_result =
- execute_command_internal (command, 1, pipe_in, pipe_out,
- fds_to_close);
- }
- else
- {
- if (ignore_return && command->value.Group->command)
- command->value.Group->command->flags |= CMD_IGNORE_RETURN;
- exec_result =
- execute_command_internal (command->value.Group->command,
- asynchronous, pipe_in, pipe_out,
- fds_to_close);
- }
- break;
-
- case cm_connection:
- exec_result = execute_connection (command, asynchronous,
- pipe_in, pipe_out, fds_to_close);
- break;
-
-#if defined (DPAREN_ARITHMETIC)
- case cm_arith:
- was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0;
- if (ignore_return)
- command->value.Arith->flags |= CMD_IGNORE_RETURN;
- line_number_for_err_trap = save_line_number = line_number;
- exec_result = execute_arith_command (command->value.Arith);
- line_number = save_line_number;
-
- if (was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS)
- {
- last_command_exit_value = exec_result;
- save_line_number = line_number;
- line_number = line_number_for_err_trap;
- run_error_trap ();
- line_number = save_line_number;
- }
-
- if (ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS)
- {
- last_command_exit_value = exec_result;
- run_pending_traps ();
- jump_to_top_level (ERREXIT);
- }
-
- break;
-#endif
-
-#if defined (COND_COMMAND)
- case cm_cond:
- was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0;
- if (ignore_return)
- command->value.Cond->flags |= CMD_IGNORE_RETURN;
-
- line_number_for_err_trap = save_line_number = line_number;
- exec_result = execute_cond_command (command->value.Cond);
- line_number = save_line_number;
-
- if (was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS)
- {
- last_command_exit_value = exec_result;
- save_line_number = line_number;
- line_number = line_number_for_err_trap;
- run_error_trap ();
- line_number = save_line_number;
- }
-
- if (ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS)
- {
- last_command_exit_value = exec_result;
- run_pending_traps ();
- jump_to_top_level (ERREXIT);
- }
-
- break;
-#endif
-
- case cm_function_def:
- exec_result = execute_intern_function (command->value.Function_def->name,
- command->value.Function_def->command);
- break;
-
- default:
- command_error ("execute_command", CMDERR_BADTYPE, command->type, 0);
- }
-
- if (my_undo_list)
- {
- do_redirections (my_undo_list, RX_ACTIVE);
- dispose_redirects (my_undo_list);
- }
-
- if (exec_undo_list)
- dispose_redirects (exec_undo_list);
-
- if (my_undo_list || exec_undo_list)
- discard_unwind_frame ("loop_redirections");
-
- /* Invert the return value if we have to */
- if (invert)
- exec_result = (exec_result == EXECUTION_SUCCESS)
- ? EXECUTION_FAILURE
- : EXECUTION_SUCCESS;
-
-#if defined (DPAREN_ARITHMETIC) || defined (COND_COMMAND)
- /* This is where we set PIPESTATUS from the exit status of the appropriate
- compound commands (the ones that look enough like simple commands to
- cause confusion). We might be able to optimize by not doing this if
- subshell_environment != 0. */
- switch (command->type)
- {
-# if defined (DPAREN_ARITHMETIC)
- case cm_arith:
-# endif
-# if defined (COND_COMMAND)
- case cm_cond:
-# endif
- set_pipestatus_from_exit (exec_result);
- break;
- }
-#endif
-
- last_command_exit_value = exec_result;
- run_pending_traps ();
-#if 0
- if (running_trap == 0)
-#endif
- currently_executing_command = (COMMAND *)NULL;
- return (last_command_exit_value);
-}
-
-#if defined (COMMAND_TIMING)
-
-#if defined (HAVE_GETRUSAGE) && defined (HAVE_GETTIMEOFDAY)
-extern struct timeval *difftimeval __P((struct timeval *, struct timeval *, struct timeval *));
-extern struct timeval *addtimeval __P((struct timeval *, struct timeval *, struct timeval *));
-extern int timeval_to_cpu __P((struct timeval *, struct timeval *, struct timeval *));
-#endif
-
-#define POSIX_TIMEFORMAT "real %2R\nuser %2U\nsys %2S"
-#define BASH_TIMEFORMAT "\nreal\t%3lR\nuser\t%3lU\nsys\t%3lS"
-
-static const int precs[] = { 0, 100, 10, 1 };
-
-/* Expand one `%'-prefixed escape sequence from a time format string. */
-static int
-mkfmt (buf, prec, lng, sec, sec_fraction)
- char *buf;
- int prec, lng;
- time_t sec;
- int sec_fraction;
-{
- time_t min;
- char abuf[INT_STRLEN_BOUND(time_t) + 1];
- int ind, aind;
-
- ind = 0;
- abuf[sizeof(abuf) - 1] = '\0';
-
- /* If LNG is non-zero, we want to decompose SEC into minutes and seconds. */
- if (lng)
- {
- min = sec / 60;
- sec %= 60;
- aind = sizeof(abuf) - 2;
- do
- abuf[aind--] = (min % 10) + '0';
- while (min /= 10);
- aind++;
- while (abuf[aind])
- buf[ind++] = abuf[aind++];
- buf[ind++] = 'm';
- }
-
- /* Now add the seconds. */
- aind = sizeof (abuf) - 2;
- do
- abuf[aind--] = (sec % 10) + '0';
- while (sec /= 10);
- aind++;
- while (abuf[aind])
- buf[ind++] = abuf[aind++];
-
- /* We want to add a decimal point and PREC places after it if PREC is
- nonzero. PREC is not greater than 3. SEC_FRACTION is between 0
- and 999. */
- if (prec != 0)
- {
- buf[ind++] = '.';
- for (aind = 1; aind <= prec; aind++)
- {
- buf[ind++] = (sec_fraction / precs[aind]) + '0';
- sec_fraction %= precs[aind];
- }
- }
-
- if (lng)
- buf[ind++] = 's';
- buf[ind] = '\0';
-
- return (ind);
-}
-
-/* Interpret the format string FORMAT, interpolating the following escape
- sequences:
- %[prec][l][RUS]
-
- where the optional `prec' is a precision, meaning the number of
- characters after the decimal point, the optional `l' means to format
- using minutes and seconds (MMmNN[.FF]s), like the `times' builtin',
- and the last character is one of
-
- R number of seconds of `real' time
- U number of seconds of `user' time
- S number of seconds of `system' time
-
- An occurrence of `%%' in the format string is translated to a `%'. The
- result is printed to FP, a pointer to a FILE. The other variables are
- the seconds and thousandths of a second of real, user, and system time,
- resectively. */
-static void
-print_formatted_time (fp, format, rs, rsf, us, usf, ss, ssf, cpu)
- FILE *fp;
- char *format;
- time_t rs;
- int rsf;
- time_t us;
- int usf;
- time_t ss;
- int ssf, cpu;
-{
- int prec, lng, len;
- char *str, *s, ts[INT_STRLEN_BOUND (time_t) + sizeof ("mSS.FFFF")];
- time_t sum;
- int sum_frac;
- int sindex, ssize;
-
- len = strlen (format);
- ssize = (len + 64) - (len % 64);
- str = (char *)xmalloc (ssize);
- sindex = 0;
-
- for (s = format; *s; s++)
- {
- if (*s != '%' || s[1] == '\0')
- {
- RESIZE_MALLOCED_BUFFER (str, sindex, 1, ssize, 64);
- str[sindex++] = *s;
- }
- else if (s[1] == '%')
- {
- s++;
- RESIZE_MALLOCED_BUFFER (str, sindex, 1, ssize, 64);
- str[sindex++] = *s;
- }
- else if (s[1] == 'P')
- {
- s++;
-#if 0
- /* clamp CPU usage at 100% */
- if (cpu > 10000)
- cpu = 10000;
-#endif
- sum = cpu / 100;
- sum_frac = (cpu % 100) * 10;
- len = mkfmt (ts, 2, 0, sum, sum_frac);
- RESIZE_MALLOCED_BUFFER (str, sindex, len, ssize, 64);
- strcpy (str + sindex, ts);
- sindex += len;
- }
- else
- {
- prec = 3; /* default is three places past the decimal point. */
- lng = 0; /* default is to not use minutes or append `s' */
- s++;
- if (DIGIT (*s)) /* `precision' */
- {
- prec = *s++ - '0';
- if (prec > 3) prec = 3;
- }
- if (*s == 'l') /* `length extender' */
- {
- lng = 1;
- s++;
- }
- if (*s == 'R' || *s == 'E')
- len = mkfmt (ts, prec, lng, rs, rsf);
- else if (*s == 'U')
- len = mkfmt (ts, prec, lng, us, usf);
- else if (*s == 'S')
- len = mkfmt (ts, prec, lng, ss, ssf);
- else
- {
- internal_error (_("TIMEFORMAT: `%c': invalid format character"), *s);
- free (str);
- return;
- }
- RESIZE_MALLOCED_BUFFER (str, sindex, len, ssize, 64);
- strcpy (str + sindex, ts);
- sindex += len;
- }
- }
-
- str[sindex] = '\0';
- fprintf (fp, "%s\n", str);
- fflush (fp);
-
- free (str);
-}
-
-static int
-time_command (command, asynchronous, pipe_in, pipe_out, fds_to_close)
- COMMAND *command;
- int asynchronous, pipe_in, pipe_out;
- struct fd_bitmap *fds_to_close;
-{
- int rv, posix_time, old_flags, nullcmd;
- time_t rs, us, ss;
- int rsf, usf, ssf;
- int cpu;
- char *time_format;
-
-#if defined (HAVE_GETRUSAGE) && defined (HAVE_GETTIMEOFDAY)
- struct timeval real, user, sys;
- struct timeval before, after;
-# if defined (HAVE_STRUCT_TIMEZONE)
- struct timezone dtz; /* posix doesn't define this */
-# endif
- struct rusage selfb, selfa, kidsb, kidsa; /* a = after, b = before */
-#else
-# if defined (HAVE_TIMES)
- clock_t tbefore, tafter, real, user, sys;
- struct tms before, after;
-# endif
-#endif
-
-#if defined (HAVE_GETRUSAGE) && defined (HAVE_GETTIMEOFDAY)
-# if defined (HAVE_STRUCT_TIMEZONE)
- gettimeofday (&before, &dtz);
-# else
- gettimeofday (&before, (void *)NULL);
-# endif /* !HAVE_STRUCT_TIMEZONE */
- getrusage (RUSAGE_SELF, &selfb);
- getrusage (RUSAGE_CHILDREN, &kidsb);
-#else
-# if defined (HAVE_TIMES)
- tbefore = times (&before);
-# endif
-#endif
-
- posix_time = (command->flags & CMD_TIME_POSIX);
-
- nullcmd = (command == 0) || (command->type == cm_simple && command->value.Simple->words == 0 && command->value.Simple->redirects == 0);
- if (posixly_correct && nullcmd)
- {
-#if defined (HAVE_GETRUSAGE)
- selfb.ru_utime.tv_sec = kidsb.ru_utime.tv_sec = selfb.ru_stime.tv_sec = kidsb.ru_stime.tv_sec = 0;
- selfb.ru_utime.tv_usec = kidsb.ru_utime.tv_usec = selfb.ru_stime.tv_usec = kidsb.ru_stime.tv_usec = 0;
- before.tv_sec = shell_start_time;
- before.tv_usec = 0;
-#else
- before.tms_utime = before.tms_stime = before.tms_cutime = before.tms_cstime = 0;
- tbefore = shell_start_time;
-#endif
- }
-
- old_flags = command->flags;
- command->flags &= ~(CMD_TIME_PIPELINE|CMD_TIME_POSIX);
- rv = execute_command_internal (command, asynchronous, pipe_in, pipe_out, fds_to_close);
- command->flags = old_flags;
-
- rs = us = ss = 0;
- rsf = usf = ssf = cpu = 0;
-
-#if defined (HAVE_GETRUSAGE) && defined (HAVE_GETTIMEOFDAY)
-# if defined (HAVE_STRUCT_TIMEZONE)
- gettimeofday (&after, &dtz);
-# else
- gettimeofday (&after, (void *)NULL);
-# endif /* !HAVE_STRUCT_TIMEZONE */
- getrusage (RUSAGE_SELF, &selfa);
- getrusage (RUSAGE_CHILDREN, &kidsa);
-
- difftimeval (&real, &before, &after);
- timeval_to_secs (&real, &rs, &rsf);
-
- addtimeval (&user, difftimeval(&after, &selfb.ru_utime, &selfa.ru_utime),
- difftimeval(&before, &kidsb.ru_utime, &kidsa.ru_utime));
- timeval_to_secs (&user, &us, &usf);
-
- addtimeval (&sys, difftimeval(&after, &selfb.ru_stime, &selfa.ru_stime),
- difftimeval(&before, &kidsb.ru_stime, &kidsa.ru_stime));
- timeval_to_secs (&sys, &ss, &ssf);
-
- cpu = timeval_to_cpu (&real, &user, &sys);
-#else
-# if defined (HAVE_TIMES)
- tafter = times (&after);
-
- real = tafter - tbefore;
- clock_t_to_secs (real, &rs, &rsf);
-
- user = (after.tms_utime - before.tms_utime) + (after.tms_cutime - before.tms_cutime);
- clock_t_to_secs (user, &us, &usf);
-
- sys = (after.tms_stime - before.tms_stime) + (after.tms_cstime - before.tms_cstime);
- clock_t_to_secs (sys, &ss, &ssf);
-
- cpu = (real == 0) ? 0 : ((user + sys) * 10000) / real;
-
-# else
- rs = us = ss = 0;
- rsf = usf = ssf = cpu = 0;
-# endif
-#endif
-
- if (posix_time)
- time_format = POSIX_TIMEFORMAT;
- else if ((time_format = get_string_value ("TIMEFORMAT")) == 0)
- {
- if (posixly_correct && nullcmd)
- time_format = "user\t%2lU\nsys\t%2lS";
- else
- time_format = BASH_TIMEFORMAT;
- }
- if (time_format && *time_format)
- print_formatted_time (stderr, time_format, rs, rsf, us, usf, ss, ssf, cpu);
-
- return rv;
-}
-#endif /* COMMAND_TIMING */
-
-/* Execute a command that's supposed to be in a subshell. This must be
- called after make_child and we must be running in the child process.
- The caller will return or exit() immediately with the value this returns. */
-static int
-execute_in_subshell (command, asynchronous, pipe_in, pipe_out, fds_to_close)
- COMMAND *command;
- int asynchronous;
- int pipe_in, pipe_out;
- struct fd_bitmap *fds_to_close;
-{
- int user_subshell, return_code, function_value, should_redir_stdin, invert;
- int ois, user_coproc;
- int result;
- volatile COMMAND *tcom;
-
- USE_VAR(user_subshell);
- USE_VAR(user_coproc);
- USE_VAR(invert);
- USE_VAR(tcom);
- USE_VAR(asynchronous);
-
- subshell_level++;
- should_redir_stdin = (asynchronous && (command->flags & CMD_STDIN_REDIR) &&
- pipe_in == NO_PIPE &&
- stdin_redirects (command->redirects) == 0);
-
- invert = (command->flags & CMD_INVERT_RETURN) != 0;
- user_subshell = command->type == cm_subshell || ((command->flags & CMD_WANT_SUBSHELL) != 0);
- user_coproc = command->type == cm_coproc;
-
- command->flags &= ~(CMD_FORCE_SUBSHELL | CMD_WANT_SUBSHELL | CMD_INVERT_RETURN);
-
- /* If a command is asynchronous in a subshell (like ( foo ) & or
- the special case of an asynchronous GROUP command where the
- the subshell bit is turned on down in case cm_group: below),
- turn off `asynchronous', so that two subshells aren't spawned.
- XXX - asynchronous used to be set to 0 in this block, but that
- means that setup_async_signals was never run. Now it's set to
- 0 after subshell_environment is set appropriately and setup_async_signals
- is run.
-
- This seems semantically correct to me. For example,
- ( foo ) & seems to say ``do the command `foo' in a subshell
- environment, but don't wait for that subshell to finish'',
- and "{ foo ; bar ; } &" seems to me to be like functions or
- builtins in the background, which executed in a subshell
- environment. I just don't see the need to fork two subshells. */
-
- /* Don't fork again, we are already in a subshell. A `doubly
- async' shell is not interactive, however. */
- if (asynchronous)
- {
-#if defined (JOB_CONTROL)
- /* If a construct like ( exec xxx yyy ) & is given while job
- control is active, we want to prevent exec from putting the
- subshell back into the original process group, carefully
- undoing all the work we just did in make_child. */
- original_pgrp = -1;
-#endif /* JOB_CONTROL */
- ois = interactive_shell;
- interactive_shell = 0;
- /* This test is to prevent alias expansion by interactive shells that
- run `(command) &' but to allow scripts that have enabled alias
- expansion with `shopt -s expand_alias' to continue to expand
- aliases. */
- if (ois != interactive_shell)
- expand_aliases = 0;
- }
-
- /* Subshells are neither login nor interactive. */
- login_shell = interactive = 0;
-
- if (user_subshell)
- subshell_environment = SUBSHELL_PAREN;
- else
- {
- subshell_environment = 0; /* XXX */
- if (asynchronous)
- subshell_environment |= SUBSHELL_ASYNC;
- if (pipe_in != NO_PIPE || pipe_out != NO_PIPE)
- subshell_environment |= SUBSHELL_PIPE;
- if (user_coproc)
- subshell_environment |= SUBSHELL_COPROC;
- }
-
- reset_terminating_signals (); /* in sig.c */
- /* Cancel traps, in trap.c. */
- /* Reset the signal handlers in the child, but don't free the
- trap strings. Set a flag noting that we have to free the
- trap strings if we run trap to change a signal disposition. */
- reset_signal_handlers ();
- subshell_environment |= SUBSHELL_RESETTRAP;
-
- /* Make sure restore_original_signals doesn't undo the work done by
- make_child to ensure that asynchronous children are immune to SIGINT
- and SIGQUIT. Turn off asynchronous to make sure more subshells are
- not spawned. */
- if (asynchronous)
- {
- setup_async_signals ();
- asynchronous = 0;
- }
-
-#if defined (JOB_CONTROL)
- set_sigchld_handler ();
-#endif /* JOB_CONTROL */
-
- set_sigint_handler ();
-
-#if defined (JOB_CONTROL)
- /* Delete all traces that there were any jobs running. This is
- only for subshells. */
- without_job_control ();
-#endif /* JOB_CONTROL */
-
- if (fds_to_close)
- close_fd_bitmap (fds_to_close);
-
- do_piping (pipe_in, pipe_out);
-
-#if defined (COPROCESS_SUPPORT)
- coproc_closeall ();
-#endif
-
- /* If this is a user subshell, set a flag if stdin was redirected.
- This is used later to decide whether to redirect fd 0 to
- /dev/null for async commands in the subshell. This adds more
- sh compatibility, but I'm not sure it's the right thing to do. */
- if (user_subshell)
- {
- stdin_redir = stdin_redirects (command->redirects);
- restore_default_signal (0);
- }
-
- /* If this is an asynchronous command (command &), we want to
- redirect the standard input from /dev/null in the absence of
- any specific redirection involving stdin. */
- if (should_redir_stdin && stdin_redir == 0)
- async_redirect_stdin ();
-
- /* Do redirections, then dispose of them before recursive call. */
- if (command->redirects)
- {
- if (do_redirections (command->redirects, RX_ACTIVE) != 0)
- exit (invert ? EXECUTION_SUCCESS : EXECUTION_FAILURE);
-
- dispose_redirects (command->redirects);
- command->redirects = (REDIRECT *)NULL;
- }
-
- if (command->type == cm_subshell)
- tcom = command->value.Subshell->command;
- else if (user_coproc)
- tcom = command->value.Coproc->command;
- else
- tcom = command;
-
- if (command->flags & CMD_TIME_PIPELINE)
- tcom->flags |= CMD_TIME_PIPELINE;
- if (command->flags & CMD_TIME_POSIX)
- tcom->flags |= CMD_TIME_POSIX;
-
- /* Make sure the subshell inherits any CMD_IGNORE_RETURN flag. */
- if ((command->flags & CMD_IGNORE_RETURN) && tcom != command)
- tcom->flags |= CMD_IGNORE_RETURN;
-
- /* If this is a simple command, tell execute_disk_command that it
- might be able to get away without forking and simply exec.
- This means things like ( sleep 10 ) will only cause one fork.
- If we're timing the command or inverting its return value, however,
- we cannot do this optimization. */
- if ((user_subshell || user_coproc) && (tcom->type == cm_simple || tcom->type == cm_subshell) &&
- ((tcom->flags & CMD_TIME_PIPELINE) == 0) &&
- ((tcom->flags & CMD_INVERT_RETURN) == 0))
- {
- tcom->flags |= CMD_NO_FORK;
- if (tcom->type == cm_simple)
- tcom->value.Simple->flags |= CMD_NO_FORK;
- }
-
- invert = (tcom->flags & CMD_INVERT_RETURN) != 0;
- tcom->flags &= ~CMD_INVERT_RETURN;
-
- result = setjmp (top_level);
-
- /* If we're inside a function while executing this subshell, we
- need to handle a possible `return'. */
- function_value = 0;
- if (return_catch_flag)
- function_value = setjmp (return_catch);
-
- /* If we're going to exit the shell, we don't want to invert the return
- status. */
- if (result == EXITPROG)
- invert = 0, return_code = last_command_exit_value;
- else if (result)
- return_code = EXECUTION_FAILURE;
- else if (function_value)
- return_code = return_catch_value;
- else
- return_code = execute_command_internal ((COMMAND *)tcom, asynchronous, NO_PIPE, NO_PIPE, fds_to_close);
-
- /* If we are asked to, invert the return value. */
- if (invert)
- return_code = (return_code == EXECUTION_SUCCESS) ? EXECUTION_FAILURE
- : EXECUTION_SUCCESS;
-
- /* If we were explicitly placed in a subshell with (), we need
- to do the `shell cleanup' things, such as running traps[0]. */
- if (user_subshell && signal_is_trapped (0))
- {
- last_command_exit_value = return_code;
- return_code = run_exit_trap ();
- }
-
- subshell_level--;
- return (return_code);
- /* NOTREACHED */
-}
-
-#if defined (COPROCESS_SUPPORT)
-#define COPROC_MAX 16
-
-typedef struct cpelement
- {
- struct cpelement *next;
- struct coproc *coproc;
- }
-cpelement_t;
-
-typedef struct cplist
- {
- struct cpelement *head;
- struct cpelement *tail;
- int ncoproc;
- }
-cplist_t;
-
-static struct cpelement *cpe_alloc __P((struct coproc *));
-static void cpe_dispose __P((struct cpelement *));
-static struct cpelement *cpl_add __P((struct coproc *));
-static struct cpelement *cpl_delete __P((pid_t));
-static void cpl_reap __P((void));
-static void cpl_flush __P((void));
-static struct cpelement *cpl_search __P((pid_t));
-static struct cpelement *cpl_searchbyname __P((char *));
-static void cpl_prune __P((void));
-
-Coproc sh_coproc = { 0, NO_PID, -1, -1, 0, 0, 0, 0 };
-
-cplist_t coproc_list = {0, 0, 0};
-
-/* Functions to manage the list of coprocs */
-
-static struct cpelement *
-cpe_alloc (cp)
- Coproc *cp;
-{
- struct cpelement *cpe;
-
- cpe = (struct cpelement *)xmalloc (sizeof (struct cpelement));
- cpe->coproc = cp;
- cpe->next = (struct cpelement *)0;
- return cpe;
-}
-
-static void
-cpe_dispose (cpe)
- struct cpelement *cpe;
-{
- free (cpe);
-}
-
-static struct cpelement *
-cpl_add (cp)
- Coproc *cp;
-{
- struct cpelement *cpe;
-
- cpe = cpe_alloc (cp);
-
- if (coproc_list.head == 0)
- {
- coproc_list.head = coproc_list.tail = cpe;
- coproc_list.ncoproc = 0; /* just to make sure */
- }
- else
- {
- coproc_list.tail->next = cpe;
- coproc_list.tail = cpe;
- }
- coproc_list.ncoproc++;
-
- return cpe;
-}
-
-static struct cpelement *
-cpl_delete (pid)
- pid_t pid;
-{
- struct cpelement *prev, *p;
-
- for (prev = p = coproc_list.head; p; prev = p, p = p->next)
- if (p->coproc->c_pid == pid)
- {
- prev->next = p->next; /* remove from list */
- break;
- }
-
- if (p == 0)
- return 0; /* not found */
-
-#if defined (DEBUG)
- itrace("cpl_delete: deleting %d", pid);
-#endif
-
- /* Housekeeping in the border cases. */
- if (p == coproc_list.head)
- coproc_list.head = coproc_list.head->next;
- else if (p == coproc_list.tail)
- coproc_list.tail = prev;
-
- coproc_list.ncoproc--;
- if (coproc_list.ncoproc == 0)
- coproc_list.head = coproc_list.tail = 0;
- else if (coproc_list.ncoproc == 1)
- coproc_list.tail = coproc_list.head; /* just to make sure */
-
- return (p);
-}
-
-static void
-cpl_reap ()
-{
- struct cpelement *prev, *p;
-
- for (prev = p = coproc_list.head; p; prev = p, p = p->next)
- if (p->coproc->c_flags & COPROC_DEAD)
- {
- prev->next = p->next; /* remove from list */
-
- /* Housekeeping in the border cases. */
- if (p == coproc_list.head)
- coproc_list.head = coproc_list.head->next;
- else if (p == coproc_list.tail)
- coproc_list.tail = prev;
-
- coproc_list.ncoproc--;
- if (coproc_list.ncoproc == 0)
- coproc_list.head = coproc_list.tail = 0;
- else if (coproc_list.ncoproc == 1)
- coproc_list.tail = coproc_list.head; /* just to make sure */
-
-#if defined (DEBUG)
- itrace("cpl_reap: deleting %d", p->coproc->c_pid);
-#endif
-
- coproc_dispose (p->coproc);
- cpe_dispose (p);
- }
-}
-
-/* Clear out the list of saved statuses */
-static void
-cpl_flush ()
-{
- struct cpelement *cpe, *p;
-
- for (cpe = coproc_list.head; cpe; )
- {
- p = cpe;
- cpe = cpe->next;
-
- coproc_dispose (p->coproc);
- cpe_dispose (p);
- }
-
- coproc_list.head = coproc_list.tail = 0;
- coproc_list.ncoproc = 0;
-}
-
-/* Search for PID in the list of coprocs; return the cpelement struct if
- found. If not found, return NULL. */
-static struct cpelement *
-cpl_search (pid)
- pid_t pid;
-{
- struct cpelement *cp;
-
- for (cp = coproc_list.head ; cp; cp = cp->next)
- if (cp->coproc->c_pid == pid)
- return cp;
- return (struct cpelement *)NULL;
-}
-
-/* Search for the coproc named NAME in the list of coprocs; return the
- cpelement struct if found. If not found, return NULL. */
-static struct cpelement *
-cpl_searchbyname (name)
- char *name;
-{
- struct cpelement *cp;
-
- for (cp = coproc_list.head ; cp; cp = cp->next)
- if (STREQ (cp->coproc->c_name, name))
- return cp;
- return (struct cpelement *)NULL;
-}
-
-#if 0
-static void
-cpl_prune ()
-{
- struct cpelement *cp;
-
- while (coproc_list.head && coproc_list.ncoproc > COPROC_MAX)
- {
- cp = coproc_list.head;
- coproc_list.head = coproc_list.head->next;
- coproc_dispose (cp->coproc);
- cpe_dispose (cp);
- coproc_list.ncoproc--;
- }
-}
-#endif
-
-/* These currently use a single global "shell coproc" but are written in a
- way to not preclude additional coprocs later (using the list management
- package above). */
-
-struct coproc *
-getcoprocbypid (pid)
- pid_t pid;
-{
- return (pid == sh_coproc.c_pid ? &sh_coproc : 0);
-}
-
-struct coproc *
-getcoprocbyname (name)
- const char *name;
-{
- return ((sh_coproc.c_name && STREQ (sh_coproc.c_name, name)) ? &sh_coproc : 0);
-}
-
-void
-coproc_init (cp)
- struct coproc *cp;
-{
- cp->c_name = 0;
- cp->c_pid = NO_PID;
- cp->c_rfd = cp->c_wfd = -1;
- cp->c_rsave = cp->c_wsave = -1;
- cp->c_flags = cp->c_status = 0;
-}
-
-struct coproc *
-coproc_alloc (name, pid)
- char *name;
- pid_t pid;
-{
- struct coproc *cp;
-
- cp = &sh_coproc; /* XXX */
- coproc_init (cp);
-
- cp->c_name = savestring (name);
- cp->c_pid = pid;
-
- return (cp);
-}
-
-void
-coproc_dispose (cp)
- struct coproc *cp;
-{
- if (cp == 0)
- return;
-
- coproc_unsetvars (cp);
- FREE (cp->c_name);
- coproc_close (cp);
- coproc_init (cp);
-}
-
-/* Placeholder for now. */
-void
-coproc_flush ()
-{
- coproc_dispose (&sh_coproc);
-}
-
-void
-coproc_close (cp)
- struct coproc *cp;
-{
- if (cp->c_rfd >= 0)
- {
- close (cp->c_rfd);
- cp->c_rfd = -1;
- }
- if (cp->c_wfd >= 0)
- {
- close (cp->c_wfd);
- cp->c_wfd = -1;
- }
- cp->c_rsave = cp->c_wsave = -1;
-}
-
-void
-coproc_closeall ()
-{
- coproc_close (&sh_coproc);
-}
-
-void
-coproc_reap ()
-{
- struct coproc *cp;
-
- cp = &sh_coproc;
- if (cp && (cp->c_flags & COPROC_DEAD))
- coproc_dispose (cp);
-}
-
-void
-coproc_rclose (cp, fd)
- struct coproc *cp;
- int fd;
-{
- if (cp->c_rfd >= 0 && cp->c_rfd == fd)
- {
- close (cp->c_rfd);
- cp->c_rfd = -1;
- }
-}
-
-void
-coproc_wclose (cp, fd)
- struct coproc *cp;
- int fd;
-{
- if (cp->c_wfd >= 0 && cp->c_wfd == fd)
- {
- close (cp->c_wfd);
- cp->c_wfd = -1;
- }
-}
-
-void
-coproc_checkfd (cp, fd)
- struct coproc *cp;
- int fd;
-{
- int update;
-
- update = 0;
- if (cp->c_rfd >= 0 && cp->c_rfd == fd)
- update = cp->c_rfd = -1;
- if (cp->c_wfd >= 0 && cp->c_wfd == fd)
- update = cp->c_wfd = -1;
- if (update)
- coproc_setvars (cp);
-}
-
-void
-coproc_fdchk (fd)
- int fd;
-{
- coproc_checkfd (&sh_coproc, fd);
-}
-
-void
-coproc_fdclose (cp, fd)
- struct coproc *cp;
- int fd;
-{
- coproc_rclose (cp, fd);
- coproc_wclose (cp, fd);
- coproc_setvars (cp);
-}
-
-void
-coproc_fdsave (cp)
- struct coproc *cp;
-{
- cp->c_rsave = cp->c_rfd;
- cp->c_wsave = cp->c_wfd;
-}
-
-void
-coproc_fdrestore (cp)
- struct coproc *cp;
-{
- cp->c_rfd = cp->c_rsave;
- cp->c_wfd = cp->c_wsave;
-}
-
-void
-coproc_pidchk (pid, status)
- pid_t pid;
-{
- struct coproc *cp;
-
- cp = getcoprocbypid (pid);
-#if 0
- if (cp)
- itrace("coproc_pidchk: pid %d has died", pid);
-#endif
- if (cp)
- {
- cp->c_status = status;
- cp->c_flags |= COPROC_DEAD;
- cp->c_flags &= ~COPROC_RUNNING;
-#if 0
- coproc_dispose (cp);
-#endif
- }
-}
-
-void
-coproc_setvars (cp)
- struct coproc *cp;
-{
- SHELL_VAR *v;
- char *namevar, *t;
- int l;
-#if defined (ARRAY_VARS)
- arrayind_t ind;
-#endif
-
- if (cp->c_name == 0)
- return;
-
- l = strlen (cp->c_name);
- namevar = xmalloc (l + 16);
-
-#if defined (ARRAY_VARS)
- v = find_variable (cp->c_name);
- if (v == 0)
- v = make_new_array_variable (cp->c_name);
- if (array_p (v) == 0)
- v = convert_var_to_array (v);
-
- t = itos (cp->c_rfd);
- ind = 0;
- v = bind_array_variable (cp->c_name, ind, t, 0);
- free (t);
-
- t = itos (cp->c_wfd);
- ind = 1;
- bind_array_variable (cp->c_name, ind, t, 0);
- free (t);
-#else
- sprintf (namevar, "%s_READ", cp->c_name);
- t = itos (cp->c_rfd);
- bind_variable (namevar, t, 0);
- free (t);
- sprintf (namevar, "%s_WRITE", cp->c_name);
- t = itos (cp->c_wfd);
- bind_variable (namevar, t, 0);
- free (t);
-#endif
-
- sprintf (namevar, "%s_PID", cp->c_name);
- t = itos (cp->c_pid);
- bind_variable (namevar, t, 0);
- free (t);
-
- free (namevar);
-}
-
-void
-coproc_unsetvars (cp)
- struct coproc *cp;
-{
- int l;
- char *namevar;
-
- if (cp->c_name == 0)
- return;
-
- l = strlen (cp->c_name);
- namevar = xmalloc (l + 16);
-
- sprintf (namevar, "%s_PID", cp->c_name);
- unbind_variable (namevar);
-
-#if defined (ARRAY_VARS)
- unbind_variable (cp->c_name);
-#else
- sprintf (namevar, "%s_READ", cp->c_name);
- unbind_variable (namevar);
- sprintf (namevar, "%s_WRITE", cp->c_name);
- unbind_variable (namevar);
-#endif
-
- free (namevar);
-}
-
-static int
-execute_coproc (command, pipe_in, pipe_out, fds_to_close)
- COMMAND *command;
- int pipe_in, pipe_out;
- struct fd_bitmap *fds_to_close;
-{
- int rpipe[2], wpipe[2], estat;
- pid_t coproc_pid;
- Coproc *cp;
- char *tcmd;
-
- /* XXX -- will require changes to handle multiple coprocs */
- if (sh_coproc.c_pid != NO_PID)
- {
-#if 0
- internal_error ("execute_coproc: coproc [%d:%s] already exists", sh_coproc.c_pid, sh_coproc.c_name);
- return (last_command_exit_value = EXECUTION_FAILURE);
-#else
- internal_warning ("execute_coproc: coproc [%d:%s] still exists", sh_coproc.c_pid, sh_coproc.c_name);
-#endif
- }
- coproc_init (&sh_coproc);
-
- command_string_index = 0;
- tcmd = make_command_string (command);
-
- sh_openpipe ((int *)&rpipe); /* 0 = parent read, 1 = child write */
- sh_openpipe ((int *)&wpipe); /* 0 = child read, 1 = parent write */
-
- coproc_pid = make_child (savestring (tcmd), 1);
- if (coproc_pid == 0)
- {
- close (rpipe[0]);
- close (wpipe[1]);
-
- estat = execute_in_subshell (command, 1, wpipe[0], rpipe[1], fds_to_close);
-
- fflush (stdout);
- fflush (stderr);
-
- exit (estat);
- }
-
- close (rpipe[1]);
- close (wpipe[0]);
-
- cp = coproc_alloc (command->value.Coproc->name, coproc_pid);
- cp->c_rfd = rpipe[0];
- cp->c_wfd = wpipe[1];
-
- SET_CLOSE_ON_EXEC (cp->c_rfd);
- SET_CLOSE_ON_EXEC (cp->c_wfd);
-
- coproc_setvars (cp);
-
-#if 0
- itrace ("execute_coproc: [%d] %s", coproc_pid, the_printed_command);
-#endif
-
- close_pipes (pipe_in, pipe_out);
-#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
- unlink_fifo_list ();
-#endif
- stop_pipeline (1, (COMMAND *)NULL);
- DESCRIBE_PID (coproc_pid);
- run_pending_traps ();
-
- return (EXECUTION_SUCCESS);
-}
-#endif
-
-static void
-restore_stdin (s)
- int s;
-{
- dup2 (s, 0);
- close (s);
-}
-
-/* Catch-all cleanup function for lastpipe code for unwind-protects */
-static void
-lastpipe_cleanup (s)
- int s;
-{
- unfreeze_jobs_list ();
-}
-
-static int
-execute_pipeline (command, asynchronous, pipe_in, pipe_out, fds_to_close)
- COMMAND *command;
- int asynchronous, pipe_in, pipe_out;
- struct fd_bitmap *fds_to_close;
-{
- int prev, fildes[2], new_bitmap_size, dummyfd, ignore_return, exec_result;
- int lstdin, lastpipe_flag, lastpipe_jid;
- COMMAND *cmd;
- struct fd_bitmap *fd_bitmap;
- pid_t lastpid;
-
-#if defined (JOB_CONTROL)
- sigset_t set, oset;
- BLOCK_CHILD (set, oset);
-#endif /* JOB_CONTROL */
-
- ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
-
- prev = pipe_in;
- cmd = command;
-
- while (cmd && cmd->type == cm_connection &&
- cmd->value.Connection && cmd->value.Connection->connector == '|')
- {
- /* Make a pipeline between the two commands. */
- if (pipe (fildes) < 0)
- {
- sys_error (_("pipe error"));
-#if defined (JOB_CONTROL)
- terminate_current_pipeline ();
- kill_current_pipeline ();
- UNBLOCK_CHILD (oset);
-#endif /* JOB_CONTROL */
- last_command_exit_value = EXECUTION_FAILURE;
- /* The unwind-protects installed below will take care
- of closing all of the open file descriptors. */
- throw_to_top_level ();
- return (EXECUTION_FAILURE); /* XXX */
- }
-
- /* Here is a problem: with the new file close-on-exec
- code, the read end of the pipe (fildes[0]) stays open
- in the first process, so that process will never get a
- SIGPIPE. There is no way to signal the first process
- that it should close fildes[0] after forking, so it
- remains open. No SIGPIPE is ever sent because there
- is still a file descriptor open for reading connected
- to the pipe. We take care of that here. This passes
- around a bitmap of file descriptors that must be
- closed after making a child process in execute_simple_command. */
-
- /* We need fd_bitmap to be at least as big as fildes[0].
- If fildes[0] is less than fds_to_close->size, then
- use fds_to_close->size. */
- new_bitmap_size = (fildes[0] < fds_to_close->size)
- ? fds_to_close->size
- : fildes[0] + 8;
-
- fd_bitmap = new_fd_bitmap (new_bitmap_size);
-
- /* Now copy the old information into the new bitmap. */
- xbcopy ((char *)fds_to_close->bitmap, (char *)fd_bitmap->bitmap, fds_to_close->size);
-
- /* And mark the pipe file descriptors to be closed. */
- fd_bitmap->bitmap[fildes[0]] = 1;
-
- /* In case there are pipe or out-of-processes errors, we
- want all these file descriptors to be closed when
- unwind-protects are run, and the storage used for the
- bitmaps freed up. */
- begin_unwind_frame ("pipe-file-descriptors");
- add_unwind_protect (dispose_fd_bitmap, fd_bitmap);
- add_unwind_protect (close_fd_bitmap, fd_bitmap);
- if (prev >= 0)
- add_unwind_protect (close, prev);
- dummyfd = fildes[1];
- add_unwind_protect (close, dummyfd);
-
-#if defined (JOB_CONTROL)
- add_unwind_protect (restore_signal_mask, &oset);
-#endif /* JOB_CONTROL */
-
- if (ignore_return && cmd->value.Connection->first)
- cmd->value.Connection->first->flags |= CMD_IGNORE_RETURN;
- execute_command_internal (cmd->value.Connection->first, asynchronous,
- prev, fildes[1], fd_bitmap);
-
- if (prev >= 0)
- close (prev);
-
- prev = fildes[0];
- close (fildes[1]);
-
- dispose_fd_bitmap (fd_bitmap);
- discard_unwind_frame ("pipe-file-descriptors");
-
- cmd = cmd->value.Connection->second;
- }
-
- lastpid = last_made_pid;
-
- /* Now execute the rightmost command in the pipeline. */
- if (ignore_return && cmd)
- cmd->flags |= CMD_IGNORE_RETURN;
-
- lastpipe_flag = 0;
- begin_unwind_frame ("lastpipe-exec");
- lstdin = -1;
- /* If the `lastpipe' option is set with shopt, and job control is not
- enabled, execute the last element of non-async pipelines in the
- current shell environment. */
- if (lastpipe_opt && job_control == 0 && asynchronous == 0 && pipe_out == NO_PIPE && prev > 0)
- {
- lstdin = move_to_high_fd (0, 0, 255);
- if (lstdin > 0)
- {
- do_piping (prev, pipe_out);
- prev = NO_PIPE;
- add_unwind_protect (restore_stdin, lstdin);
- lastpipe_flag = 1;
- freeze_jobs_list ();
- lastpipe_jid = stop_pipeline (0, (COMMAND *)NULL); /* XXX */
- add_unwind_protect (lastpipe_cleanup, lastpipe_jid);
- }
- cmd->flags |= CMD_LASTPIPE;
- }
- if (prev >= 0)
- add_unwind_protect (close, prev);
-
- exec_result = execute_command_internal (cmd, asynchronous, prev, pipe_out, fds_to_close);
-
- if (lstdin > 0)
- restore_stdin (lstdin);
-
- if (prev >= 0)
- close (prev);
-
-#if defined (JOB_CONTROL)
- UNBLOCK_CHILD (oset);
-#endif
-
- QUIT;
-
- if (lastpipe_flag)
- {
-#if defined (JOB_CONTROL)
- append_process (savestring (the_printed_command), dollar_dollar_pid, exec_result, lastpipe_jid);
-#endif
- lstdin = wait_for (lastpid);
-#if defined (JOB_CONTROL)
- exec_result = job_exit_status (lastpipe_jid);
-#endif
- unfreeze_jobs_list ();
- }
-
- discard_unwind_frame ("lastpipe-exec");
-
- return (exec_result);
-}
-
-static int
-execute_connection (command, asynchronous, pipe_in, pipe_out, fds_to_close)
- COMMAND *command;
- int asynchronous, pipe_in, pipe_out;
- struct fd_bitmap *fds_to_close;
-{
- COMMAND *tc, *second;
- int ignore_return, exec_result, was_error_trap, invert;
- volatile int save_line_number;
-
- ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
-
- switch (command->value.Connection->connector)
- {
- /* Do the first command asynchronously. */
- case '&':
- tc = command->value.Connection->first;
- if (tc == 0)
- return (EXECUTION_SUCCESS);
-
- if (ignore_return)
- tc->flags |= CMD_IGNORE_RETURN;
- tc->flags |= CMD_AMPERSAND;
-
- /* If this shell was compiled without job control support,
- if we are currently in a subshell via `( xxx )', or if job
- control is not active then the standard input for an
- asynchronous command is forced to /dev/null. */
-#if defined (JOB_CONTROL)
- if ((subshell_environment || !job_control) && !stdin_redir)
-#else
- if (!stdin_redir)
-#endif /* JOB_CONTROL */
- tc->flags |= CMD_STDIN_REDIR;
-
- exec_result = execute_command_internal (tc, 1, pipe_in, pipe_out, fds_to_close);
- QUIT;
-
- if (tc->flags & CMD_STDIN_REDIR)
- tc->flags &= ~CMD_STDIN_REDIR;
-
- second = command->value.Connection->second;
- if (second)
- {
- if (ignore_return)
- second->flags |= CMD_IGNORE_RETURN;
-
- exec_result = execute_command_internal (second, asynchronous, pipe_in, pipe_out, fds_to_close);
- }
-
- break;
-
- /* Just call execute command on both sides. */
- case ';':
- if (ignore_return)
- {
- if (command->value.Connection->first)
- command->value.Connection->first->flags |= CMD_IGNORE_RETURN;
- if (command->value.Connection->second)
- command->value.Connection->second->flags |= CMD_IGNORE_RETURN;
- }
- executing_list++;
- QUIT;
- execute_command (command->value.Connection->first);
- QUIT;
- exec_result = execute_command_internal (command->value.Connection->second,
- asynchronous, pipe_in, pipe_out,
- fds_to_close);
- executing_list--;
- break;
-
- case '|':
- was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0;
- invert = (command->flags & CMD_INVERT_RETURN) != 0;
- ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
-
- line_number_for_err_trap = line_number;
- exec_result = execute_pipeline (command, asynchronous, pipe_in, pipe_out, fds_to_close);
-
- if (was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS)
- {
- last_command_exit_value = exec_result;
- save_line_number = line_number;
- line_number = line_number_for_err_trap;
- run_error_trap ();
- line_number = save_line_number;
- }
-
- if (ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS)
- {
- last_command_exit_value = exec_result;
- run_pending_traps ();
- jump_to_top_level (ERREXIT);
- }
-
- break;
-
- case AND_AND:
- case OR_OR:
- if (asynchronous)
- {
- /* If we have something like `a && b &' or `a || b &', run the
- && or || stuff in a subshell. Force a subshell and just call
- execute_command_internal again. Leave asynchronous on
- so that we get a report from the parent shell about the
- background job. */
- command->flags |= CMD_FORCE_SUBSHELL;
- exec_result = execute_command_internal (command, 1, pipe_in, pipe_out, fds_to_close);
- break;
- }
-
- /* Execute the first command. If the result of that is successful
- and the connector is AND_AND, or the result is not successful
- and the connector is OR_OR, then execute the second command,
- otherwise return. */
-
- executing_list++;
- if (command->value.Connection->first)
- command->value.Connection->first->flags |= CMD_IGNORE_RETURN;
-
- exec_result = execute_command (command->value.Connection->first);
- QUIT;
- if (((command->value.Connection->connector == AND_AND) &&
- (exec_result == EXECUTION_SUCCESS)) ||
- ((command->value.Connection->connector == OR_OR) &&
- (exec_result != EXECUTION_SUCCESS)))
- {
- if (ignore_return && command->value.Connection->second)
- command->value.Connection->second->flags |= CMD_IGNORE_RETURN;
-
- exec_result = execute_command (command->value.Connection->second);
- }
- executing_list--;
- break;
-
- default:
- command_error ("execute_connection", CMDERR_BADCONN, command->value.Connection->connector, 0);
- jump_to_top_level (DISCARD);
- exec_result = EXECUTION_FAILURE;
- }
-
- return exec_result;
-}
-
-#define REAP() \
- do \
- { \
- if (!interactive_shell) \
- reap_dead_jobs (); \
- } \
- while (0)
-
-/* Execute a FOR command. The syntax is: FOR word_desc IN word_list;
- DO command; DONE */
-static int
-execute_for_command (for_command)
- FOR_COM *for_command;
-{
- register WORD_LIST *releaser, *list;
- SHELL_VAR *v;
- char *identifier;
- int retval, save_line_number;
-#if 0
- SHELL_VAR *old_value = (SHELL_VAR *)NULL; /* Remember the old value of x. */
-#endif
-
- save_line_number = line_number;
- if (check_identifier (for_command->name, 1) == 0)
- {
- if (posixly_correct && interactive_shell == 0)
- {
- last_command_exit_value = EX_BADUSAGE;
- jump_to_top_level (ERREXIT);
- }
- return (EXECUTION_FAILURE);
- }
-
- loop_level++;
- identifier = for_command->name->word;
-
- list = releaser = expand_words_no_vars (for_command->map_list);
-
- begin_unwind_frame ("for");
- add_unwind_protect (dispose_words, releaser);
-
-#if 0
- if (lexical_scoping)
- {
- old_value = copy_variable (find_variable (identifier));
- if (old_value)
- add_unwind_protect (dispose_variable, old_value);
- }
-#endif
-
- if (for_command->flags & CMD_IGNORE_RETURN)
- for_command->action->flags |= CMD_IGNORE_RETURN;
-
- for (retval = EXECUTION_SUCCESS; list; list = list->next)
- {
- QUIT;
-
- line_number = for_command->line;
-
- /* Remember what this command looks like, for debugger. */
- command_string_index = 0;
- print_for_command_head (for_command);
-
- if (echo_command_at_execute)
- xtrace_print_for_command_head (for_command);
-
- /* Save this command unless it's a trap command and we're not running
- a debug trap. */
-#if 0
- if (signal_in_progress (DEBUG_TRAP) == 0 && (this_command_name == 0 || (STREQ (this_command_name, "trap") == 0)))
-#else
- if (signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0)
-#endif
- {
- FREE (the_printed_command_except_trap);
- the_printed_command_except_trap = savestring (the_printed_command);
- }
-
- retval = run_debug_trap ();
-#if defined (DEBUGGER)
- /* In debugging mode, if the DEBUG trap returns a non-zero status, we
- skip the command. */
- if (debugging_mode && retval != EXECUTION_SUCCESS)
- continue;
-#endif
-
- this_command_name = (char *)NULL;
- v = bind_variable (identifier, list->word->word, 0);
- if (readonly_p (v) || noassign_p (v))
- {
- line_number = save_line_number;
- if (readonly_p (v) && interactive_shell == 0 && posixly_correct)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- jump_to_top_level (FORCE_EOF);
- }
- else
- {
- dispose_words (releaser);
- discard_unwind_frame ("for");
- loop_level--;
- return (EXECUTION_FAILURE);
- }
- }
- retval = execute_command (for_command->action);
- REAP ();
- QUIT;
-
- if (breaking)
- {
- breaking--;
- break;
- }
-
- if (continuing)
- {
- continuing--;
- if (continuing)
- break;
- }
- }
-
- loop_level--;
- line_number = save_line_number;
-
-#if 0
- if (lexical_scoping)
- {
- if (!old_value)
- unbind_variable (identifier);
- else
- {
- SHELL_VAR *new_value;
-
- new_value = bind_variable (identifier, value_cell(old_value), 0);
- new_value->attributes = old_value->attributes;
- dispose_variable (old_value);
- }
- }
-#endif
-
- dispose_words (releaser);
- discard_unwind_frame ("for");
- return (retval);
-}
-
-#if defined (ARITH_FOR_COMMAND)
-/* Execute an arithmetic for command. The syntax is
-
- for (( init ; step ; test ))
- do
- body
- done
-
- The execution should be exactly equivalent to
-
- eval \(\( init \)\)
- while eval \(\( test \)\) ; do
- body;
- eval \(\( step \)\)
- done
-*/
-static intmax_t
-eval_arith_for_expr (l, okp)
- WORD_LIST *l;
- int *okp;
-{
- WORD_LIST *new;
- intmax_t expresult;
- int r;
-
- new = expand_words_no_vars (l);
- if (new)
- {
- if (echo_command_at_execute)
- xtrace_print_arith_cmd (new);
- this_command_name = "(("; /* )) for expression error messages */
-
- command_string_index = 0;
- print_arith_command (new);
- if (signal_in_progress (DEBUG_TRAP) == 0)
- {
- FREE (the_printed_command_except_trap);
- the_printed_command_except_trap = savestring (the_printed_command);
- }
-
- r = run_debug_trap ();
- /* In debugging mode, if the DEBUG trap returns a non-zero status, we
- skip the command. */
-#if defined (DEBUGGER)
- if (debugging_mode == 0 || r == EXECUTION_SUCCESS)
- expresult = evalexp (new->word->word, okp);
- else
- {
- expresult = 0;
- if (okp)
- *okp = 1;
- }
-#else
- expresult = evalexp (new->word->word, okp);
-#endif
- dispose_words (new);
- }
- else
- {
- expresult = 0;
- if (okp)
- *okp = 1;
- }
- return (expresult);
-}
-
-static int
-execute_arith_for_command (arith_for_command)
- ARITH_FOR_COM *arith_for_command;
-{
- intmax_t expresult;
- int expok, body_status, arith_lineno, save_lineno;
-
- body_status = EXECUTION_SUCCESS;
- loop_level++;
- save_lineno = line_number;
-
- if (arith_for_command->flags & CMD_IGNORE_RETURN)
- arith_for_command->action->flags |= CMD_IGNORE_RETURN;
-
- this_command_name = "(("; /* )) for expression error messages */
-
- /* save the starting line number of the command so we can reset
- line_number before executing each expression -- for $LINENO
- and the DEBUG trap. */
- line_number = arith_lineno = arith_for_command->line;
- if (variable_context && interactive_shell)
- line_number -= function_line_number;
-
- /* Evaluate the initialization expression. */
- expresult = eval_arith_for_expr (arith_for_command->init, &expok);
- if (expok == 0)
- {
- line_number = save_lineno;
- return (EXECUTION_FAILURE);
- }
-
- while (1)
- {
- /* Evaluate the test expression. */
- line_number = arith_lineno;
- expresult = eval_arith_for_expr (arith_for_command->test, &expok);
- line_number = save_lineno;
-
- if (expok == 0)
- {
- body_status = EXECUTION_FAILURE;
- break;
- }
- REAP ();
- if (expresult == 0)
- break;
-
- /* Execute the body of the arithmetic for command. */
- QUIT;
- body_status = execute_command (arith_for_command->action);
- QUIT;
-
- /* Handle any `break' or `continue' commands executed by the body. */
- if (breaking)
- {
- breaking--;
- break;
- }
-
- if (continuing)
- {
- continuing--;
- if (continuing)
- break;
- }
-
- /* Evaluate the step expression. */
- line_number = arith_lineno;
- expresult = eval_arith_for_expr (arith_for_command->step, &expok);
- line_number = save_lineno;
-
- if (expok == 0)
- {
- body_status = EXECUTION_FAILURE;
- break;
- }
- }
-
- loop_level--;
- line_number = save_lineno;
-
- return (body_status);
-}
-#endif
-
-#if defined (SELECT_COMMAND)
-static int LINES, COLS, tabsize;
-
-#define RP_SPACE ") "
-#define RP_SPACE_LEN 2
-
-/* XXX - does not handle numbers > 1000000 at all. */
-#define NUMBER_LEN(s) \
-((s < 10) ? 1 \
- : ((s < 100) ? 2 \
- : ((s < 1000) ? 3 \
- : ((s < 10000) ? 4 \
- : ((s < 100000) ? 5 \
- : 6)))))
-
-static int
-displen (s)
- const char *s;
-{
-#if defined (HANDLE_MULTIBYTE)
- wchar_t *wcstr;
- size_t wclen, slen;
-
- wcstr = 0;
- slen = mbstowcs (wcstr, s, 0);
- if (slen == -1)
- slen = 0;
- wcstr = (wchar_t *)xmalloc (sizeof (wchar_t) * (slen + 1));
- mbstowcs (wcstr, s, slen + 1);
- wclen = wcswidth (wcstr, slen);
- free (wcstr);
- return ((int)wclen);
-#else
- return (STRLEN (s));
-#endif
-}
-
-static int
-print_index_and_element (len, ind, list)
- int len, ind;
- WORD_LIST *list;
-{
- register WORD_LIST *l;
- register int i;
-
- if (list == 0)
- return (0);
- for (i = ind, l = list; l && --i; l = l->next)
- ;
- fprintf (stderr, "%*d%s%s", len, ind, RP_SPACE, l->word->word);
- return (displen (l->word->word));
-}
-
-static void
-indent (from, to)
- int from, to;
-{
- while (from < to)
- {
- if ((to / tabsize) > (from / tabsize))
- {
- putc ('\t', stderr);
- from += tabsize - from % tabsize;
- }
- else
- {
- putc (' ', stderr);
- from++;
- }
- }
-}
-
-static void
-print_select_list (list, list_len, max_elem_len, indices_len)
- WORD_LIST *list;
- int list_len, max_elem_len, indices_len;
-{
- int ind, row, elem_len, pos, cols, rows;
- int first_column_indices_len, other_indices_len;
-
- if (list == 0)
- {
- putc ('\n', stderr);
- return;
- }
-
- cols = max_elem_len ? COLS / max_elem_len : 1;
- if (cols == 0)
- cols = 1;
- rows = list_len ? list_len / cols + (list_len % cols != 0) : 1;
- cols = list_len ? list_len / rows + (list_len % rows != 0) : 1;
-
- if (rows == 1)
- {
- rows = cols;
- cols = 1;
- }
-
- first_column_indices_len = NUMBER_LEN (rows);
- other_indices_len = indices_len;
-
- for (row = 0; row < rows; row++)
- {
- ind = row;
- pos = 0;
- while (1)
- {
- indices_len = (pos == 0) ? first_column_indices_len : other_indices_len;
- elem_len = print_index_and_element (indices_len, ind + 1, list);
- elem_len += indices_len + RP_SPACE_LEN;
- ind += rows;
- if (ind >= list_len)
- break;
- indent (pos + elem_len, pos + max_elem_len);
- pos += max_elem_len;
- }
- putc ('\n', stderr);
- }
-}
-
-/* Print the elements of LIST, one per line, preceded by an index from 1 to
- LIST_LEN. Then display PROMPT and wait for the user to enter a number.
- If the number is between 1 and LIST_LEN, return that selection. If EOF
- is read, return a null string. If a blank line is entered, or an invalid
- number is entered, the loop is executed again. */
-static char *
-select_query (list, list_len, prompt, print_menu)
- WORD_LIST *list;
- int list_len;
- char *prompt;
- int print_menu;
-{
- int max_elem_len, indices_len, len;
- intmax_t reply;
- WORD_LIST *l;
- char *repl_string, *t;
-
-#if 0
- t = get_string_value ("LINES");
- LINES = (t && *t) ? atoi (t) : 24;
-#endif
- t = get_string_value ("COLUMNS");
- COLS = (t && *t) ? atoi (t) : 80;
-
-#if 0
- t = get_string_value ("TABSIZE");
- tabsize = (t && *t) ? atoi (t) : 8;
- if (tabsize <= 0)
- tabsize = 8;
-#else
- tabsize = 8;
-#endif
-
- max_elem_len = 0;
- for (l = list; l; l = l->next)
- {
- len = displen (l->word->word);
- if (len > max_elem_len)
- max_elem_len = len;
- }
- indices_len = NUMBER_LEN (list_len);
- max_elem_len += indices_len + RP_SPACE_LEN + 2;
-
- while (1)
- {
- if (print_menu)
- print_select_list (list, list_len, max_elem_len, indices_len);
- fprintf (stderr, "%s", prompt);
- fflush (stderr);
- QUIT;
-
- if (read_builtin ((WORD_LIST *)NULL) != EXECUTION_SUCCESS)
- {
- putchar ('\n');
- return ((char *)NULL);
- }
- repl_string = get_string_value ("REPLY");
- if (*repl_string == 0)
- {
- print_menu = 1;
- continue;
- }
- if (legal_number (repl_string, &reply) == 0)
- return "";
- if (reply < 1 || reply > list_len)
- return "";
-
- for (l = list; l && --reply; l = l->next)
- ;
- return (l->word->word);
- }
-}
-
-/* Execute a SELECT command. The syntax is:
- SELECT word IN list DO command_list DONE
- Only `break' or `return' in command_list will terminate
- the command. */
-static int
-execute_select_command (select_command)
- SELECT_COM *select_command;
-{
- WORD_LIST *releaser, *list;
- SHELL_VAR *v;
- char *identifier, *ps3_prompt, *selection;
- int retval, list_len, show_menu, save_line_number;
-
- if (check_identifier (select_command->name, 1) == 0)
- return (EXECUTION_FAILURE);
-
- save_line_number = line_number;
- line_number = select_command->line;
-
- command_string_index = 0;
- print_select_command_head (select_command);
-
- if (echo_command_at_execute)
- xtrace_print_select_command_head (select_command);
-
-#if 0
- if (signal_in_progress (DEBUG_TRAP) == 0 && (this_command_name == 0 || (STREQ (this_command_name, "trap") == 0)))
-#else
- if (signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0)
-#endif
- {
- FREE (the_printed_command_except_trap);
- the_printed_command_except_trap = savestring (the_printed_command);
- }
-
- retval = run_debug_trap ();
-#if defined (DEBUGGER)
- /* In debugging mode, if the DEBUG trap returns a non-zero status, we
- skip the command. */
- if (debugging_mode && retval != EXECUTION_SUCCESS)
- return (EXECUTION_SUCCESS);
-#endif
-
- loop_level++;
- identifier = select_command->name->word;
-
- /* command and arithmetic substitution, parameter and variable expansion,
- word splitting, pathname expansion, and quote removal. */
- list = releaser = expand_words_no_vars (select_command->map_list);
- list_len = list_length (list);
- if (list == 0 || list_len == 0)
- {
- if (list)
- dispose_words (list);
- line_number = save_line_number;
- return (EXECUTION_SUCCESS);
- }
-
- begin_unwind_frame ("select");
- add_unwind_protect (dispose_words, releaser);
-
- if (select_command->flags & CMD_IGNORE_RETURN)
- select_command->action->flags |= CMD_IGNORE_RETURN;
-
- retval = EXECUTION_SUCCESS;
- show_menu = 1;
-
- while (1)
- {
- line_number = select_command->line;
- ps3_prompt = get_string_value ("PS3");
- if (ps3_prompt == 0)
- ps3_prompt = "#? ";
-
- QUIT;
- selection = select_query (list, list_len, ps3_prompt, show_menu);
- QUIT;
- if (selection == 0)
- {
- /* select_query returns EXECUTION_FAILURE if the read builtin
- fails, so we want to return failure in this case. */
- retval = EXECUTION_FAILURE;
- break;
- }
-
- v = bind_variable (identifier, selection, 0);
- if (readonly_p (v) || noassign_p (v))
- {
- if (readonly_p (v) && interactive_shell == 0 && posixly_correct)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- jump_to_top_level (FORCE_EOF);
- }
- else
- {
- dispose_words (releaser);
- discard_unwind_frame ("select");
- loop_level--;
- line_number = save_line_number;
- return (EXECUTION_FAILURE);
- }
- }
-
- retval = execute_command (select_command->action);
-
- REAP ();
- QUIT;
-
- if (breaking)
- {
- breaking--;
- break;
- }
-
- if (continuing)
- {
- continuing--;
- if (continuing)
- break;
- }
-
-#if defined (KSH_COMPATIBLE_SELECT)
- show_menu = 0;
- selection = get_string_value ("REPLY");
- if (selection && *selection == '\0')
- show_menu = 1;
-#endif
- }
-
- loop_level--;
- line_number = save_line_number;
-
- dispose_words (releaser);
- discard_unwind_frame ("select");
- return (retval);
-}
-#endif /* SELECT_COMMAND */
-
-/* Execute a CASE command. The syntax is: CASE word_desc IN pattern_list ESAC.
- The pattern_list is a linked list of pattern clauses; each clause contains
- some patterns to compare word_desc against, and an associated command to
- execute. */
-static int
-execute_case_command (case_command)
- CASE_COM *case_command;
-{
- register WORD_LIST *list;
- WORD_LIST *wlist, *es;
- PATTERN_LIST *clauses;
- char *word, *pattern;
- int retval, match, ignore_return, save_line_number;
-
- save_line_number = line_number;
- line_number = case_command->line;
-
- command_string_index = 0;
- print_case_command_head (case_command);
-
- if (echo_command_at_execute)
- xtrace_print_case_command_head (case_command);
-
-#if 0
- if (signal_in_progress (DEBUG_TRAP) == 0 && (this_command_name == 0 || (STREQ (this_command_name, "trap") == 0)))
-#else
- if (signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0)
-#endif
- {
- FREE (the_printed_command_except_trap);
- the_printed_command_except_trap = savestring (the_printed_command);
- }
-
- retval = run_debug_trap();
-#if defined (DEBUGGER)
- /* In debugging mode, if the DEBUG trap returns a non-zero status, we
- skip the command. */
- if (debugging_mode && retval != EXECUTION_SUCCESS)
- {
- line_number = save_line_number;
- return (EXECUTION_SUCCESS);
- }
-#endif
-
- wlist = expand_word_unsplit (case_command->word, 0);
- word = wlist ? string_list (wlist) : savestring ("");
- dispose_words (wlist);
-
- retval = EXECUTION_SUCCESS;
- ignore_return = case_command->flags & CMD_IGNORE_RETURN;
-
- begin_unwind_frame ("case");
- add_unwind_protect ((Function *)xfree, word);
-
-#define EXIT_CASE() goto exit_case_command
-
- for (clauses = case_command->clauses; clauses; clauses = clauses->next)
- {
- QUIT;
- for (list = clauses->patterns; list; list = list->next)
- {
- es = expand_word_leave_quoted (list->word, 0);
-
- if (es && es->word && es->word->word && *(es->word->word))
- pattern = quote_string_for_globbing (es->word->word, QGLOB_CVTNULL);
- else
- {
- pattern = (char *)xmalloc (1);
- pattern[0] = '\0';
- }
-
- /* Since the pattern does not undergo quote removal (as per
- Posix.2, section 3.9.4.3), the strmatch () call must be able
- to recognize backslashes as escape characters. */
- match = strmatch (pattern, word, FNMATCH_EXTFLAG|FNMATCH_IGNCASE) != FNM_NOMATCH;
- free (pattern);
-
- dispose_words (es);
-
- if (match)
- {
- do
- {
- if (clauses->action && ignore_return)
- clauses->action->flags |= CMD_IGNORE_RETURN;
- retval = execute_command (clauses->action);
- }
- while ((clauses->flags & CASEPAT_FALLTHROUGH) && (clauses = clauses->next));
- if (clauses == 0 || (clauses->flags & CASEPAT_TESTNEXT) == 0)
- EXIT_CASE ();
- else
- break;
- }
-
- QUIT;
- }
- }
-
-exit_case_command:
- free (word);
- discard_unwind_frame ("case");
- line_number = save_line_number;
- return (retval);
-}
-
-#define CMD_WHILE 0
-#define CMD_UNTIL 1
-
-/* The WHILE command. Syntax: WHILE test DO action; DONE.
- Repeatedly execute action while executing test produces
- EXECUTION_SUCCESS. */
-static int
-execute_while_command (while_command)
- WHILE_COM *while_command;
-{
- return (execute_while_or_until (while_command, CMD_WHILE));
-}
-
-/* UNTIL is just like WHILE except that the test result is negated. */
-static int
-execute_until_command (while_command)
- WHILE_COM *while_command;
-{
- return (execute_while_or_until (while_command, CMD_UNTIL));
-}
-
-/* The body for both while and until. The only difference between the
- two is that the test value is treated differently. TYPE is
- CMD_WHILE or CMD_UNTIL. The return value for both commands should
- be EXECUTION_SUCCESS if no commands in the body are executed, and
- the status of the last command executed in the body otherwise. */
-static int
-execute_while_or_until (while_command, type)
- WHILE_COM *while_command;
- int type;
-{
- int return_value, body_status;
-
- body_status = EXECUTION_SUCCESS;
- loop_level++;
-
- while_command->test->flags |= CMD_IGNORE_RETURN;
- if (while_command->flags & CMD_IGNORE_RETURN)
- while_command->action->flags |= CMD_IGNORE_RETURN;
-
- while (1)
- {
- return_value = execute_command (while_command->test);
- REAP ();
-
- /* Need to handle `break' in the test when we would break out of the
- loop. The job control code will set `breaking' to loop_level
- when a job in a loop is stopped with SIGTSTP. If the stopped job
- is in the loop test, `breaking' will not be reset unless we do
- this, and the shell will cease to execute commands. */
- if (type == CMD_WHILE && return_value != EXECUTION_SUCCESS)
- {
- if (breaking)
- breaking--;
- break;
- }
- if (type == CMD_UNTIL && return_value == EXECUTION_SUCCESS)
- {
- if (breaking)
- breaking--;
- break;
- }
-
- QUIT;
- body_status = execute_command (while_command->action);
- QUIT;
-
- if (breaking)
- {
- breaking--;
- break;
- }
-
- if (continuing)
- {
- continuing--;
- if (continuing)
- break;
- }
- }
- loop_level--;
-
- return (body_status);
-}
-
-/* IF test THEN command [ELSE command].
- IF also allows ELIF in the place of ELSE IF, but
- the parser makes *that* stupidity transparent. */
-static int
-execute_if_command (if_command)
- IF_COM *if_command;
-{
- int return_value, save_line_number;
-
- save_line_number = line_number;
- if_command->test->flags |= CMD_IGNORE_RETURN;
- return_value = execute_command (if_command->test);
- line_number = save_line_number;
-
- if (return_value == EXECUTION_SUCCESS)
- {
- QUIT;
-
- if (if_command->true_case && (if_command->flags & CMD_IGNORE_RETURN))
- if_command->true_case->flags |= CMD_IGNORE_RETURN;
-
- return (execute_command (if_command->true_case));
- }
- else
- {
- QUIT;
-
- if (if_command->false_case && (if_command->flags & CMD_IGNORE_RETURN))
- if_command->false_case->flags |= CMD_IGNORE_RETURN;
-
- return (execute_command (if_command->false_case));
- }
-}
-
-#if defined (DPAREN_ARITHMETIC)
-static int
-execute_arith_command (arith_command)
- ARITH_COM *arith_command;
-{
- int expok, save_line_number, retval;
- intmax_t expresult;
- WORD_LIST *new;
- char *exp;
-
- expresult = 0;
-
- save_line_number = line_number;
- this_command_name = "(("; /* )) */
- line_number = arith_command->line;
- /* If we're in a function, update the line number information. */
- if (variable_context && interactive_shell)
- line_number -= function_line_number;
-
- command_string_index = 0;
- print_arith_command (arith_command->exp);
-
- if (signal_in_progress (DEBUG_TRAP) == 0)
- {
- FREE (the_printed_command_except_trap);
- the_printed_command_except_trap = savestring (the_printed_command);
- }
-
- /* Run the debug trap before each arithmetic command, but do it after we
- update the line number information and before we expand the various
- words in the expression. */
- retval = run_debug_trap ();
-#if defined (DEBUGGER)
- /* In debugging mode, if the DEBUG trap returns a non-zero status, we
- skip the command. */
- if (debugging_mode && retval != EXECUTION_SUCCESS)
- {
- line_number = save_line_number;
- return (EXECUTION_SUCCESS);
- }
-#endif
-
- new = expand_words_no_vars (arith_command->exp);
-
- /* If we're tracing, make a new word list with `((' at the front and `))'
- at the back and print it. */
- if (echo_command_at_execute)
- xtrace_print_arith_cmd (new);
-
- if (new)
- {
- exp = new->next ? string_list (new) : new->word->word;
- expresult = evalexp (exp, &expok);
- line_number = save_line_number;
- if (exp != new->word->word)
- free (exp);
- dispose_words (new);
- }
- else
- {
- expresult = 0;
- expok = 1;
- }
-
- if (expok == 0)
- return (EXECUTION_FAILURE);
-
- return (expresult == 0 ? EXECUTION_FAILURE : EXECUTION_SUCCESS);
-}
-#endif /* DPAREN_ARITHMETIC */
-
-#if defined (COND_COMMAND)
-
-static char * const nullstr = "";
-
-static int
-execute_cond_node (cond)
- COND_COM *cond;
-{
- int result, invert, patmatch, rmatch, mflags, ignore;
- char *arg1, *arg2;
-
- invert = (cond->flags & CMD_INVERT_RETURN);
- ignore = (cond->flags & CMD_IGNORE_RETURN);
- if (ignore)
- {
- if (cond->left)
- cond->left->flags |= CMD_IGNORE_RETURN;
- if (cond->right)
- cond->right->flags |= CMD_IGNORE_RETURN;
- }
-
- if (cond->type == COND_EXPR)
- result = execute_cond_node (cond->left);
- else if (cond->type == COND_OR)
- {
- result = execute_cond_node (cond->left);
- if (result != EXECUTION_SUCCESS)
- result = execute_cond_node (cond->right);
- }
- else if (cond->type == COND_AND)
- {
- result = execute_cond_node (cond->left);
- if (result == EXECUTION_SUCCESS)
- result = execute_cond_node (cond->right);
- }
- else if (cond->type == COND_UNARY)
- {
- if (ignore)
- comsub_ignore_return++;
- arg1 = cond_expand_word (cond->left->op, 0);
- if (ignore)
- comsub_ignore_return--;
- if (arg1 == 0)
- arg1 = nullstr;
- if (echo_command_at_execute)
- xtrace_print_cond_term (cond->type, invert, cond->op, arg1, (char *)NULL);
- result = unary_test (cond->op->word, arg1) ? EXECUTION_SUCCESS : EXECUTION_FAILURE;
- if (arg1 != nullstr)
- free (arg1);
- }
- else if (cond->type == COND_BINARY)
- {
- rmatch = 0;
- patmatch = ((cond->op->word[1] == '=') && (cond->op->word[2] == '\0') &&
- (cond->op->word[0] == '!' || cond->op->word[0] == '=') ||
- (cond->op->word[0] == '=' && cond->op->word[1] == '\0'));
-#if defined (COND_REGEXP)
- rmatch = (cond->op->word[0] == '=' && cond->op->word[1] == '~' &&
- cond->op->word[2] == '\0');
-#endif
-
- if (ignore)
- comsub_ignore_return++;
- arg1 = cond_expand_word (cond->left->op, 0);
- if (ignore)
- comsub_ignore_return--;
- if (arg1 == 0)
- arg1 = nullstr;
- if (ignore)
- comsub_ignore_return++;
- arg2 = cond_expand_word (cond->right->op,
- (rmatch && shell_compatibility_level > 31) ? 2 : (patmatch ? 1 : 0));
- if (ignore)
- comsub_ignore_return--;
- if (arg2 == 0)
- arg2 = nullstr;
-
- if (echo_command_at_execute)
- xtrace_print_cond_term (cond->type, invert, cond->op, arg1, arg2);
-
-#if defined (COND_REGEXP)
- if (rmatch)
- {
- mflags = SHMAT_PWARN;
-#if defined (ARRAY_VARS)
- mflags |= SHMAT_SUBEXP;
-#endif
-
- result = sh_regmatch (arg1, arg2, mflags);
- }
- else
-#endif /* COND_REGEXP */
- {
- int oe;
- oe = extended_glob;
- extended_glob = 1;
- result = binary_test (cond->op->word, arg1, arg2, TEST_PATMATCH|TEST_ARITHEXP|TEST_LOCALE)
- ? EXECUTION_SUCCESS
- : EXECUTION_FAILURE;
- extended_glob = oe;
- }
- if (arg1 != nullstr)
- free (arg1);
- if (arg2 != nullstr)
- free (arg2);
- }
- else
- {
- command_error ("execute_cond_node", CMDERR_BADTYPE, cond->type, 0);
- jump_to_top_level (DISCARD);
- result = EXECUTION_FAILURE;
- }
-
- if (invert)
- result = (result == EXECUTION_SUCCESS) ? EXECUTION_FAILURE : EXECUTION_SUCCESS;
-
- return result;
-}
-
-static int
-execute_cond_command (cond_command)
- COND_COM *cond_command;
-{
- int retval, save_line_number;
-
- retval = EXECUTION_SUCCESS;
- save_line_number = line_number;
-
- this_command_name = "[[";
- line_number = cond_command->line;
- /* If we're in a function, update the line number information. */
- if (variable_context && interactive_shell)
- line_number -= function_line_number;
- command_string_index = 0;
- print_cond_command (cond_command);
-
- if (signal_in_progress (DEBUG_TRAP) == 0)
- {
- FREE (the_printed_command_except_trap);
- the_printed_command_except_trap = savestring (the_printed_command);
- }
-
- /* Run the debug trap before each conditional command, but do it after we
- update the line number information. */
- retval = run_debug_trap ();
-#if defined (DEBUGGER)
- /* In debugging mode, if the DEBUG trap returns a non-zero status, we
- skip the command. */
- if (debugging_mode && retval != EXECUTION_SUCCESS)
- {
- line_number = save_line_number;
- return (EXECUTION_SUCCESS);
- }
-#endif
-
-#if 0
- debug_print_cond_command (cond_command);
-#endif
-
- last_command_exit_value = retval = execute_cond_node (cond_command);
- line_number = save_line_number;
- return (retval);
-}
-#endif /* COND_COMMAND */
-
-static void
-bind_lastarg (arg)
- char *arg;
-{
- SHELL_VAR *var;
-
- if (arg == 0)
- arg = "";
- var = bind_variable ("_", arg, 0);
- VUNSETATTR (var, att_exported);
-}
-
-/* Execute a null command. Fork a subshell if the command uses pipes or is
- to be run asynchronously. This handles all the side effects that are
- supposed to take place. */
-static int
-execute_null_command (redirects, pipe_in, pipe_out, async)
- REDIRECT *redirects;
- int pipe_in, pipe_out, async;
-{
- int r;
- int forcefork;
- REDIRECT *rd;
-
- for (forcefork = 0, rd = redirects; rd; rd = rd->next)
- forcefork += rd->rflags & REDIR_VARASSIGN;
-
- if (forcefork || pipe_in != NO_PIPE || pipe_out != NO_PIPE || async)
- {
- /* We have a null command, but we really want a subshell to take
- care of it. Just fork, do piping and redirections, and exit. */
- if (make_child ((char *)NULL, async) == 0)
- {
- /* Cancel traps, in trap.c. */
- restore_original_signals (); /* XXX */
-
- do_piping (pipe_in, pipe_out);
-
-#if defined (COPROCESS_SUPPORT)
- coproc_closeall ();
-#endif
-
- subshell_environment = 0;
- if (async)
- subshell_environment |= SUBSHELL_ASYNC;
- if (pipe_in != NO_PIPE || pipe_out != NO_PIPE)
- subshell_environment |= SUBSHELL_PIPE;
-
- if (do_redirections (redirects, RX_ACTIVE) == 0)
- exit (EXECUTION_SUCCESS);
- else
- exit (EXECUTION_FAILURE);
- }
- else
- {
- close_pipes (pipe_in, pipe_out);
-#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
- unlink_fifo_list ();
-#endif
- return (EXECUTION_SUCCESS);
- }
- }
- else
- {
- /* Even if there aren't any command names, pretend to do the
- redirections that are specified. The user expects the side
- effects to take place. If the redirections fail, then return
- failure. Otherwise, if a command substitution took place while
- expanding the command or a redirection, return the value of that
- substitution. Otherwise, return EXECUTION_SUCCESS. */
-
- r = do_redirections (redirects, RX_ACTIVE|RX_UNDOABLE);
- cleanup_redirects (redirection_undo_list);
- redirection_undo_list = (REDIRECT *)NULL;
-
- if (r != 0)
- return (EXECUTION_FAILURE);
- else if (last_command_subst_pid != NO_PID)
- return (last_command_exit_value);
- else
- return (EXECUTION_SUCCESS);
- }
-}
-
-/* This is a hack to suppress word splitting for assignment statements
- given as arguments to builtins with the ASSIGNMENT_BUILTIN flag set. */
-static void
-fix_assignment_words (words)
- WORD_LIST *words;
-{
- WORD_LIST *w;
- struct builtin *b;
- int assoc;
-
- if (words == 0)
- return;
-
- b = 0;
- assoc = 0;
-
- for (w = words; w; w = w->next)
- if (w->word->flags & W_ASSIGNMENT)
- {
- if (b == 0)
- {
- b = builtin_address_internal (words->word->word, 0);
- if (b == 0 || (b->flags & ASSIGNMENT_BUILTIN) == 0)
- return;
- else if (b && (b->flags & ASSIGNMENT_BUILTIN))
- words->word->flags |= W_ASSNBLTIN;
- }
- w->word->flags |= (W_NOSPLIT|W_NOGLOB|W_TILDEEXP|W_ASSIGNARG);
-#if defined (ARRAY_VARS)
- if (assoc)
- w->word->flags |= W_ASSIGNASSOC;
-#endif
- }
-#if defined (ARRAY_VARS)
- /* Note that we saw an associative array option to a builtin that takes
- assignment statements. This is a bit of a kludge. */
- else if (w->word->word[0] == '-' && strchr (w->word->word, 'A'))
- {
- if (b == 0)
- {
- b = builtin_address_internal (words->word->word, 0);
- if (b == 0 || (b->flags & ASSIGNMENT_BUILTIN) == 0)
- return;
- else if (b && (b->flags & ASSIGNMENT_BUILTIN))
- words->word->flags |= W_ASSNBLTIN;
- }
- if (words->word->flags & W_ASSNBLTIN)
- assoc = 1;
- }
-#endif
-}
-
-/* Return 1 if the file found by searching $PATH for PATHNAME, defaulting
- to PATHNAME, is a directory. Used by the autocd code below. */
-static int
-is_dirname (pathname)
- char *pathname;
-{
- char *temp;
- temp = search_for_command (pathname);
- return (temp ? file_isdir (temp) : file_isdir (pathname));
-}
-
-/* The meaty part of all the executions. We have to start hacking the
- real execution of commands here. Fork a process, set things up,
- execute the command. */
-static int
-execute_simple_command (simple_command, pipe_in, pipe_out, async, fds_to_close)
- SIMPLE_COM *simple_command;
- int pipe_in, pipe_out, async;
- struct fd_bitmap *fds_to_close;
-{
- WORD_LIST *words, *lastword;
- char *command_line, *lastarg, *temp;
- int first_word_quoted, result, builtin_is_special, already_forked, dofork;
- pid_t old_last_async_pid;
- sh_builtin_func_t *builtin;
- SHELL_VAR *func;
- volatile int old_builtin, old_command_builtin;
-
- result = EXECUTION_SUCCESS;
- special_builtin_failed = builtin_is_special = 0;
- command_line = (char *)0;
-
- /* If we're in a function, update the line number information. */
- if (variable_context && interactive_shell && sourcelevel == 0)
- line_number -= function_line_number;
-
- /* Remember what this command line looks like at invocation. */
- command_string_index = 0;
- print_simple_command (simple_command);
-
-#if 0
- if (signal_in_progress (DEBUG_TRAP) == 0 && (this_command_name == 0 || (STREQ (this_command_name, "trap") == 0)))
-#else
- if (signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0)
-#endif
- {
- FREE (the_printed_command_except_trap);
- the_printed_command_except_trap = the_printed_command ? savestring (the_printed_command) : (char *)0;
- }
-
- /* Run the debug trap before each simple command, but do it after we
- update the line number information. */
- result = run_debug_trap ();
-#if defined (DEBUGGER)
- /* In debugging mode, if the DEBUG trap returns a non-zero status, we
- skip the command. */
- if (debugging_mode && result != EXECUTION_SUCCESS)
- return (EXECUTION_SUCCESS);
-#endif
-
- first_word_quoted =
- simple_command->words ? (simple_command->words->word->flags & W_QUOTED) : 0;
-
- last_command_subst_pid = NO_PID;
- old_last_async_pid = last_asynchronous_pid;
-
- already_forked = dofork = 0;
-
- /* If we're in a pipeline or run in the background, set DOFORK so we
- make the child early, before word expansion. This keeps assignment
- statements from affecting the parent shell's environment when they
- should not. */
- dofork = pipe_in != NO_PIPE || pipe_out != NO_PIPE || async;
-
- /* Something like `%2 &' should restart job 2 in the background, not cause
- the shell to fork here. */
- if (dofork && pipe_in == NO_PIPE && pipe_out == NO_PIPE &&
- simple_command->words && simple_command->words->word &&
- simple_command->words->word->word &&
- (simple_command->words->word->word[0] == '%'))
- dofork = 0;
-
- if (dofork)
- {
- /* Do this now, because execute_disk_command will do it anyway in the
- vast majority of cases. */
- maybe_make_export_env ();
-
- /* Don't let a DEBUG trap overwrite the command string to be saved with
- the process/job associated with this child. */
- if (make_child (savestring (the_printed_command_except_trap), async) == 0)
- {
- already_forked = 1;
- simple_command->flags |= CMD_NO_FORK;
-
- subshell_environment = SUBSHELL_FORK;
- if (pipe_in != NO_PIPE || pipe_out != NO_PIPE)
- subshell_environment |= SUBSHELL_PIPE;
- if (async)
- subshell_environment |= SUBSHELL_ASYNC;
-
- /* We need to do this before piping to handle some really
- pathological cases where one of the pipe file descriptors
- is < 2. */
- if (fds_to_close)
- close_fd_bitmap (fds_to_close);
-
- do_piping (pipe_in, pipe_out);
- pipe_in = pipe_out = NO_PIPE;
-#if defined (COPROCESS_SUPPORT)
- coproc_closeall ();
-#endif
-
- last_asynchronous_pid = old_last_async_pid;
- }
- else
- {
- /* Don't let simple commands that aren't the last command in a
- pipeline change $? for the rest of the pipeline (or at all). */
- if (pipe_out != NO_PIPE)
- result = last_command_exit_value;
- close_pipes (pipe_in, pipe_out);
-#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
- unlink_fifo_list ();
-#endif
- command_line = (char *)NULL; /* don't free this. */
- bind_lastarg ((char *)NULL);
- return (result);
- }
- }
-
- /* If we are re-running this as the result of executing the `command'
- builtin, do not expand the command words a second time. */
- if ((simple_command->flags & CMD_INHIBIT_EXPANSION) == 0)
- {
- current_fds_to_close = fds_to_close;
- fix_assignment_words (simple_command->words);
- /* Pass the ignore return flag down to command substitutions */
- if (simple_command->flags & CMD_IGNORE_RETURN) /* XXX */
- comsub_ignore_return++;
- words = expand_words (simple_command->words);
- if (simple_command->flags & CMD_IGNORE_RETURN)
- comsub_ignore_return--;
- current_fds_to_close = (struct fd_bitmap *)NULL;
- }
- else
- words = copy_word_list (simple_command->words);
-
- /* It is possible for WORDS not to have anything left in it.
- Perhaps all the words consisted of `$foo', and there was
- no variable `$foo'. */
- if (words == 0)
- {
- this_command_name = 0;
- result = execute_null_command (simple_command->redirects,
- pipe_in, pipe_out,
- already_forked ? 0 : async);
- if (already_forked)
- exit (result);
- else
- {
- bind_lastarg ((char *)NULL);
- set_pipestatus_from_exit (result);
- return (result);
- }
- }
-
- lastarg = (char *)NULL;
-
- begin_unwind_frame ("simple-command");
-
- if (echo_command_at_execute)
- xtrace_print_word_list (words, 1);
-
- builtin = (sh_builtin_func_t *)NULL;
- func = (SHELL_VAR *)NULL;
- if ((simple_command->flags & CMD_NO_FUNCTIONS) == 0)
- {
- /* Posix.2 says special builtins are found before functions. We
- don't set builtin_is_special anywhere other than here, because
- this path is followed only when the `command' builtin is *not*
- being used, and we don't want to exit the shell if a special
- builtin executed with `command builtin' fails. `command' is not
- a special builtin. */
- if (posixly_correct)
- {
- builtin = find_special_builtin (words->word->word);
- if (builtin)
- builtin_is_special = 1;
- }
- if (builtin == 0)
- func = find_function (words->word->word);
- }
-
- /* In POSIX mode, assignment errors in the temporary environment cause a
- non-interactive shell to exit. */
- if (builtin_is_special && interactive_shell == 0 && tempenv_assign_error)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- jump_to_top_level (ERREXIT);
- }
-
- add_unwind_protect (dispose_words, words);
- QUIT;
-
- /* Bind the last word in this command to "$_" after execution. */
- for (lastword = words; lastword->next; lastword = lastword->next)
- ;
- lastarg = lastword->word->word;
-
-#if defined (JOB_CONTROL)
- /* Is this command a job control related thing? */
- if (words->word->word[0] == '%' && already_forked == 0)
- {
- this_command_name = async ? "bg" : "fg";
- last_shell_builtin = this_shell_builtin;
- this_shell_builtin = builtin_address (this_command_name);
- result = (*this_shell_builtin) (words);
- goto return_result;
- }
-
- /* One other possiblilty. The user may want to resume an existing job.
- If they do, find out whether this word is a candidate for a running
- job. */
- if (job_control && already_forked == 0 && async == 0 &&
- !first_word_quoted &&
- !words->next &&
- words->word->word[0] &&
- !simple_command->redirects &&
- pipe_in == NO_PIPE &&
- pipe_out == NO_PIPE &&
- (temp = get_string_value ("auto_resume")))
- {
- int job, jflags, started_status;
-
- jflags = JM_STOPPED|JM_FIRSTMATCH;
- if (STREQ (temp, "exact"))
- jflags |= JM_EXACT;
- else if (STREQ (temp, "substring"))
- jflags |= JM_SUBSTRING;
- else
- jflags |= JM_PREFIX;
- job = get_job_by_name (words->word->word, jflags);
- if (job != NO_JOB)
- {
- run_unwind_frame ("simple-command");
- this_command_name = "fg";
- last_shell_builtin = this_shell_builtin;
- this_shell_builtin = builtin_address ("fg");
-
- started_status = start_job (job, 1);
- return ((started_status < 0) ? EXECUTION_FAILURE : started_status);
- }
- }
-#endif /* JOB_CONTROL */
-
-run_builtin:
- /* Remember the name of this command globally. */
- this_command_name = words->word->word;
-
- QUIT;
-
- /* This command could be a shell builtin or a user-defined function.
- We have already found special builtins by this time, so we do not
- set builtin_is_special. If this is a function or builtin, and we
- have pipes, then fork a subshell in here. Otherwise, just execute
- the command directly. */
- if (func == 0 && builtin == 0)
- builtin = find_shell_builtin (this_command_name);
-
- last_shell_builtin = this_shell_builtin;
- this_shell_builtin = builtin;
-
- if (builtin || func)
- {
- if (builtin)
- {
- old_builtin = executing_builtin;
- old_command_builtin = executing_command_builtin;
- unwind_protect_int (executing_builtin); /* modified in execute_builtin */
- unwind_protect_int (executing_command_builtin); /* ditto */
- }
- if (already_forked)
- {
- /* reset_terminating_signals (); */ /* XXX */
- /* Reset the signal handlers in the child, but don't free the
- trap strings. Set a flag noting that we have to free the
- trap strings if we run trap to change a signal disposition. */
- reset_signal_handlers ();
- subshell_environment |= SUBSHELL_RESETTRAP;
-
- if (async)
- {
- if ((simple_command->flags & CMD_STDIN_REDIR) &&
- pipe_in == NO_PIPE &&
- (stdin_redirects (simple_command->redirects) == 0))
- async_redirect_stdin ();
- setup_async_signals ();
- }
-
- subshell_level++;
- execute_subshell_builtin_or_function
- (words, simple_command->redirects, builtin, func,
- pipe_in, pipe_out, async, fds_to_close,
- simple_command->flags);
- subshell_level--;
- }
- else
- {
- result = execute_builtin_or_function
- (words, builtin, func, simple_command->redirects, fds_to_close,
- simple_command->flags);
- if (builtin)
- {
- if (result > EX_SHERRBASE)
- {
- result = builtin_status (result);
- if (builtin_is_special)
- special_builtin_failed = 1;
- }
- /* In POSIX mode, if there are assignment statements preceding
- a special builtin, they persist after the builtin
- completes. */
- if (posixly_correct && builtin_is_special && temporary_env)
- merge_temporary_env ();
- }
- else /* function */
- {
- if (result == EX_USAGE)
- result = EX_BADUSAGE;
- else if (result > EX_SHERRBASE)
- result = EXECUTION_FAILURE;
- }
-
- set_pipestatus_from_exit (result);
-
- goto return_result;
- }
- }
-
- if (autocd && interactive && words->word && is_dirname (words->word->word))
- {
- words = make_word_list (make_word ("cd"), words);
- xtrace_print_word_list (words, 0);
- goto run_builtin;
- }
-
- if (command_line == 0)
- command_line = savestring (the_printed_command_except_trap);
-
-#if defined (PROCESS_SUBSTITUTION)
- if ((subshell_environment & SUBSHELL_COMSUB) && (simple_command->flags & CMD_NO_FORK) && fifos_pending() > 0)
- simple_command->flags &= ~CMD_NO_FORK;
-#endif
-
- result = execute_disk_command (words, simple_command->redirects, command_line,
- pipe_in, pipe_out, async, fds_to_close,
- simple_command->flags);
-
- return_result:
- bind_lastarg (lastarg);
- FREE (command_line);
- dispose_words (words);
- if (builtin)
- {
- executing_builtin = old_builtin;
- executing_command_builtin = old_command_builtin;
- }
- discard_unwind_frame ("simple-command");
- this_command_name = (char *)NULL; /* points to freed memory now */
- return (result);
-}
-
-/* Translate the special builtin exit statuses. We don't really need a
- function for this; it's a placeholder for future work. */
-static int
-builtin_status (result)
- int result;
-{
- int r;
-
- switch (result)
- {
- case EX_USAGE:
- r = EX_BADUSAGE;
- break;
- case EX_REDIRFAIL:
- case EX_BADSYNTAX:
- case EX_BADASSIGN:
- case EX_EXPFAIL:
- r = EXECUTION_FAILURE;
- break;
- default:
- r = EXECUTION_SUCCESS;
- break;
- }
- return (r);
-}
-
-static int
-execute_builtin (builtin, words, flags, subshell)
- sh_builtin_func_t *builtin;
- WORD_LIST *words;
- int flags, subshell;
-{
- int old_e_flag, result, eval_unwind;
- int isbltinenv;
- char *error_trap;
-
-#if 0
- /* XXX -- added 12/11 */
- terminate_immediately++;
-#endif
-
- error_trap = 0;
- old_e_flag = exit_immediately_on_error;
- /* The eval builtin calls parse_and_execute, which does not know about
- the setting of flags, and always calls the execution functions with
- flags that will exit the shell on an error if -e is set. If the
- eval builtin is being called, and we're supposed to ignore the exit
- value of the command, we turn the -e flag off ourselves and disable
- the ERR trap, then restore them when the command completes. This is
- also a problem (as below) for the command and source/. builtins. */
- if (subshell == 0 && (flags & CMD_IGNORE_RETURN) &&
- (builtin == eval_builtin || builtin == command_builtin || builtin == source_builtin))
- {
- begin_unwind_frame ("eval_builtin");
- unwind_protect_int (exit_immediately_on_error);
- error_trap = TRAP_STRING (ERROR_TRAP);
- if (error_trap)
- {
- error_trap = savestring (error_trap);
- add_unwind_protect (xfree, error_trap);
- add_unwind_protect (set_error_trap, error_trap);
- restore_default_signal (ERROR_TRAP);
- }
- exit_immediately_on_error = 0;
- eval_unwind = 1;
- }
- else
- eval_unwind = 0;
-
- /* The temporary environment for a builtin is supposed to apply to
- all commands executed by that builtin. Currently, this is a
- problem only with the `unset', `source' and `eval' builtins. */
-
- isbltinenv = (builtin == source_builtin || builtin == eval_builtin || builtin == unset_builtin);
-
- if (isbltinenv)
- {
- if (subshell == 0)
- begin_unwind_frame ("builtin_env");
-
- if (temporary_env)
- {
- push_scope (VC_BLTNENV, temporary_env);
- if (subshell == 0)
- add_unwind_protect (pop_scope, (flags & CMD_COMMAND_BUILTIN) ? 0 : "1");
- temporary_env = (HASH_TABLE *)NULL;
- }
- }
-
- /* `return' does a longjmp() back to a saved environment in execute_function.
- If a variable assignment list preceded the command, and the shell is
- running in POSIX mode, we need to merge that into the shell_variables
- table, since `return' is a POSIX special builtin. */
- if (posixly_correct && subshell == 0 && builtin == return_builtin && temporary_env)
- {
- begin_unwind_frame ("return_temp_env");
- add_unwind_protect (merge_temporary_env, (char *)NULL);
- }
-
- executing_builtin++;
- executing_command_builtin |= builtin == command_builtin;
- result = ((*builtin) (words->next));
-
- /* This shouldn't happen, but in case `return' comes back instead of
- longjmp'ing, we need to unwind. */
- if (posixly_correct && subshell == 0 && builtin == return_builtin && temporary_env)
- discard_unwind_frame ("return_temp_env");
-
- if (subshell == 0 && isbltinenv)
- run_unwind_frame ("builtin_env");
-
- if (eval_unwind)
- {
- exit_immediately_on_error += old_e_flag;
- if (error_trap)
- {
- set_error_trap (error_trap);
- xfree (error_trap);
- }
- discard_unwind_frame ("eval_builtin");
- }
-
-#if 0
- /* XXX -- added 12/11 */
- terminate_immediately--;
-#endif
-
- return (result);
-}
-
-static int
-execute_function (var, words, flags, fds_to_close, async, subshell)
- SHELL_VAR *var;
- WORD_LIST *words;
- int flags;
- struct fd_bitmap *fds_to_close;
- int async, subshell;
-{
- int return_val, result;
- COMMAND *tc, *fc, *save_current;
- char *debug_trap, *error_trap, *return_trap;
-#if defined (ARRAY_VARS)
- SHELL_VAR *funcname_v, *nfv, *bash_source_v, *bash_lineno_v;
- ARRAY *funcname_a;
- volatile ARRAY *bash_source_a;
- volatile ARRAY *bash_lineno_a;
-#endif
- FUNCTION_DEF *shell_fn;
- char *sfile, *t;
-
- USE_VAR(fc);
-
- if (funcnest_max > 0 && funcnest >= funcnest_max)
- {
- internal_error ("%s: maximum function nesting level exceeded (%d)", var->name, funcnest);
- funcnest = 0; /* XXX - should we reset it somewhere else? */
- jump_to_top_level (DISCARD);
- }
-
-#if defined (ARRAY_VARS)
- GET_ARRAY_FROM_VAR ("FUNCNAME", funcname_v, funcname_a);
- GET_ARRAY_FROM_VAR ("BASH_SOURCE", bash_source_v, bash_source_a);
- GET_ARRAY_FROM_VAR ("BASH_LINENO", bash_lineno_v, bash_lineno_a);
-#endif
-
- tc = (COMMAND *)copy_command (function_cell (var));
- if (tc && (flags & CMD_IGNORE_RETURN))
- tc->flags |= CMD_IGNORE_RETURN;
-
- if (subshell == 0)
- {
- begin_unwind_frame ("function_calling");
- push_context (var->name, subshell, temporary_env);
- add_unwind_protect (pop_context, (char *)NULL);
- unwind_protect_int (line_number);
- unwind_protect_int (return_catch_flag);
- unwind_protect_jmp_buf (return_catch);
- add_unwind_protect (dispose_command, (char *)tc);
- unwind_protect_pointer (this_shell_function);
- unwind_protect_int (loop_level);
- unwind_protect_int (funcnest);
- }
- else
- push_context (var->name, subshell, temporary_env); /* don't unwind-protect for subshells */
-
- temporary_env = (HASH_TABLE *)NULL;
-
- this_shell_function = var;
- make_funcname_visible (1);
-
- debug_trap = TRAP_STRING(DEBUG_TRAP);
- error_trap = TRAP_STRING(ERROR_TRAP);
- return_trap = TRAP_STRING(RETURN_TRAP);
-
- /* The order of the unwind protects for debug_trap, error_trap and
- return_trap is important here! unwind-protect commands are run
- in reverse order of registration. If this causes problems, take
- out the xfree unwind-protect calls and live with the small memory leak. */
-
- /* function_trace_mode != 0 means that all functions inherit the DEBUG trap.
- if the function has the trace attribute set, it inherits the DEBUG trap */
- if (debug_trap && ((trace_p (var) == 0) && function_trace_mode == 0))
- {
- if (subshell == 0)
- {
- debug_trap = savestring (debug_trap);
- add_unwind_protect (xfree, debug_trap);
- add_unwind_protect (set_debug_trap, debug_trap);
- }
- restore_default_signal (DEBUG_TRAP);
- }
-
- /* error_trace_mode != 0 means that functions inherit the ERR trap. */
- if (error_trap && error_trace_mode == 0)
- {
- if (subshell == 0)
- {
- error_trap = savestring (error_trap);
- add_unwind_protect (xfree, error_trap);
- add_unwind_protect (set_error_trap, error_trap);
- }
- restore_default_signal (ERROR_TRAP);
- }
-
- /* Shell functions inherit the RETURN trap if function tracing is on
- globally or on individually for this function. */
-#if 0
- if (return_trap && ((trace_p (var) == 0) && function_trace_mode == 0))
-#else
- if (return_trap && (signal_in_progress (DEBUG_TRAP) || ((trace_p (var) == 0) && function_trace_mode == 0)))
-#endif
- {
- if (subshell == 0)
- {
- return_trap = savestring (return_trap);
- add_unwind_protect (xfree, return_trap);
- add_unwind_protect (set_return_trap, return_trap);
- }
- restore_default_signal (RETURN_TRAP);
- }
-
- funcnest++;
-#if defined (ARRAY_VARS)
- /* This is quite similar to the code in shell.c and elsewhere. */
- shell_fn = find_function_def (this_shell_function->name);
- sfile = shell_fn ? shell_fn->source_file : "";
- array_push ((ARRAY *)funcname_a, this_shell_function->name);
-
- array_push ((ARRAY *)bash_source_a, sfile);
- t = itos (executing_line_number ());
- array_push ((ARRAY *)bash_lineno_a, t);
- free (t);
-#endif
-
- /* The temporary environment for a function is supposed to apply to
- all commands executed within the function body. */
-
- remember_args (words->next, 1);
-
- /* Update BASH_ARGV and BASH_ARGC */
- if (debugging_mode)
- push_args (words->next);
-
- /* Number of the line on which the function body starts. */
- line_number = function_line_number = tc->line;
-
-#if defined (JOB_CONTROL)
- if (subshell)
- stop_pipeline (async, (COMMAND *)NULL);
-#endif
-
- fc = tc;
-
- return_catch_flag++;
- return_val = setjmp (return_catch);
-
- if (return_val)
- {
- result = return_catch_value;
- /* Run the RETURN trap in the function's context. */
- save_current = currently_executing_command;
- run_return_trap ();
- currently_executing_command = save_current;
- }
- else
- {
- /* Run the debug trap here so we can trap at the start of a function's
- execution rather than the execution of the body's first command. */
- showing_function_line = 1;
- save_current = currently_executing_command;
- result = run_debug_trap ();
-#if defined (DEBUGGER)
- /* In debugging mode, if the DEBUG trap returns a non-zero status, we
- skip the command. */
- if (debugging_mode == 0 || result == EXECUTION_SUCCESS)
- {
- showing_function_line = 0;
- currently_executing_command = save_current;
- result = execute_command_internal (fc, 0, NO_PIPE, NO_PIPE, fds_to_close);
-
- /* Run the RETURN trap in the function's context */
- save_current = currently_executing_command;
- run_return_trap ();
- currently_executing_command = save_current;
- }
-#else
- result = execute_command_internal (fc, 0, NO_PIPE, NO_PIPE, fds_to_close);
-
- save_current = currently_executing_command;
- run_return_trap ();
- currently_executing_command = save_current;
-#endif
- showing_function_line = 0;
- }
-
- /* Restore BASH_ARGC and BASH_ARGV */
- if (debugging_mode)
- pop_args ();
-
- if (subshell == 0)
- run_unwind_frame ("function_calling");
-
-#if defined (ARRAY_VARS)
- /* These two variables cannot be unset, and cannot be affected by the
- function. */
- array_pop (bash_source_a);
- array_pop (bash_lineno_a);
-
- /* FUNCNAME can be unset, and so can potentially be changed by the
- function. */
- GET_ARRAY_FROM_VAR ("FUNCNAME", nfv, funcname_a);
- if (nfv == funcname_v)
- array_pop (funcname_a);
-#endif
-
- if (variable_context == 0 || this_shell_function == 0)
- {
- make_funcname_visible (0);
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif
- }
-
- return (result);
-}
-
-/* A convenience routine for use by other parts of the shell to execute
- a particular shell function. */
-int
-execute_shell_function (var, words)
- SHELL_VAR *var;
- WORD_LIST *words;
-{
- int ret;
- struct fd_bitmap *bitmap;
-
- bitmap = new_fd_bitmap (FD_BITMAP_DEFAULT_SIZE);
- begin_unwind_frame ("execute-shell-function");
- add_unwind_protect (dispose_fd_bitmap, (char *)bitmap);
-
- ret = execute_function (var, words, 0, bitmap, 0, 0);
-
- dispose_fd_bitmap (bitmap);
- discard_unwind_frame ("execute-shell-function");
-
- return ret;
-}
-
-/* Execute a shell builtin or function in a subshell environment. This
- routine does not return; it only calls exit(). If BUILTIN is non-null,
- it points to a function to call to execute a shell builtin; otherwise
- VAR points at the body of a function to execute. WORDS is the arguments
- to the command, REDIRECTS specifies redirections to perform before the
- command is executed. */
-static void
-execute_subshell_builtin_or_function (words, redirects, builtin, var,
- pipe_in, pipe_out, async, fds_to_close,
- flags)
- WORD_LIST *words;
- REDIRECT *redirects;
- sh_builtin_func_t *builtin;
- SHELL_VAR *var;
- int pipe_in, pipe_out, async;
- struct fd_bitmap *fds_to_close;
- int flags;
-{
- int result, r, funcvalue;
-#if defined (JOB_CONTROL)
- int jobs_hack;
-
- jobs_hack = (builtin == jobs_builtin) &&
- ((subshell_environment & SUBSHELL_ASYNC) == 0 || pipe_out != NO_PIPE);
-#endif
-
- /* A subshell is neither a login shell nor interactive. */
- login_shell = interactive = 0;
-
- if (async)
- subshell_environment |= SUBSHELL_ASYNC;
- if (pipe_in != NO_PIPE || pipe_out != NO_PIPE)
- subshell_environment |= SUBSHELL_PIPE;
-
- maybe_make_export_env (); /* XXX - is this needed? */
-
-#if defined (JOB_CONTROL)
- /* Eradicate all traces of job control after we fork the subshell, so
- all jobs begun by this subshell are in the same process group as
- the shell itself. */
-
- /* Allow the output of `jobs' to be piped. */
- if (jobs_hack)
- kill_current_pipeline ();
- else
- without_job_control ();
-
- set_sigchld_handler ();
-#endif /* JOB_CONTROL */
-
- set_sigint_handler ();
-
- if (fds_to_close)
- close_fd_bitmap (fds_to_close);
-
- do_piping (pipe_in, pipe_out);
-
- if (do_redirections (redirects, RX_ACTIVE) != 0)
- exit (EXECUTION_FAILURE);
-
- if (builtin)
- {
- /* Give builtins a place to jump back to on failure,
- so we don't go back up to main(). */
- result = setjmp (top_level);
-
- /* Give the return builtin a place to jump to when executed in a subshell
- or pipeline */
- funcvalue = 0;
- if (return_catch_flag && builtin == return_builtin)
- funcvalue = setjmp (return_catch);
-
- if (result == EXITPROG)
- exit (last_command_exit_value);
- else if (result)
- exit (EXECUTION_FAILURE);
- else if (funcvalue)
- exit (return_catch_value);
- else
- {
- r = execute_builtin (builtin, words, flags, 1);
- fflush (stdout);
- if (r == EX_USAGE)
- r = EX_BADUSAGE;
- exit (r);
- }
- }
- else
- {
- r = execute_function (var, words, flags, fds_to_close, async, 1);
- fflush (stdout);
- exit (r);
- }
-}
-
-/* Execute a builtin or function in the current shell context. If BUILTIN
- is non-null, it is the builtin command to execute, otherwise VAR points
- to the body of a function. WORDS are the command's arguments, REDIRECTS
- are the redirections to perform. FDS_TO_CLOSE is the usual bitmap of
- file descriptors to close.
-
- If BUILTIN is exec_builtin, the redirections specified in REDIRECTS are
- not undone before this function returns. */
-static int
-execute_builtin_or_function (words, builtin, var, redirects,
- fds_to_close, flags)
- WORD_LIST *words;
- sh_builtin_func_t *builtin;
- SHELL_VAR *var;
- REDIRECT *redirects;
- struct fd_bitmap *fds_to_close;
- int flags;
-{
- int result;
- REDIRECT *saved_undo_list;
-#if defined (PROCESS_SUBSTITUTION)
- int ofifo, nfifo, osize;
- char *ofifo_list;
-#endif
-
-
-#if defined (PROCESS_SUBSTITUTION)
- ofifo = num_fifos ();
- ofifo_list = copy_fifo_list (&osize);
-#endif
-
- if (do_redirections (redirects, RX_ACTIVE|RX_UNDOABLE) != 0)
- {
- cleanup_redirects (redirection_undo_list);
- redirection_undo_list = (REDIRECT *)NULL;
- dispose_exec_redirects ();
-#if defined (PROCESS_SUBSTITUTION)
- free (ofifo_list);
-#endif
- return (EX_REDIRFAIL); /* was EXECUTION_FAILURE */
- }
-
- saved_undo_list = redirection_undo_list;
-
- /* Calling the "exec" builtin changes redirections forever. */
- if (builtin == exec_builtin)
- {
- dispose_redirects (saved_undo_list);
- saved_undo_list = exec_redirection_undo_list;
- exec_redirection_undo_list = (REDIRECT *)NULL;
- }
- else
- dispose_exec_redirects ();
-
- if (saved_undo_list)
- {
- begin_unwind_frame ("saved redirects");
- add_unwind_protect (cleanup_redirects, (char *)saved_undo_list);
- }
-
- redirection_undo_list = (REDIRECT *)NULL;
-
- if (builtin)
- result = execute_builtin (builtin, words, flags, 0);
- else
- result = execute_function (var, words, flags, fds_to_close, 0, 0);
-
- /* We do this before undoing the effects of any redirections. */
- fflush (stdout);
- fpurge (stdout);
- if (ferror (stdout))
- clearerr (stdout);
-
- /* If we are executing the `command' builtin, but this_shell_builtin is
- set to `exec_builtin', we know that we have something like
- `command exec [redirection]', since otherwise `exec' would have
- overwritten the shell and we wouldn't get here. In this case, we
- want to behave as if the `command' builtin had not been specified
- and preserve the redirections. */
- if (builtin == command_builtin && this_shell_builtin == exec_builtin)
- {
- int discard;
-
- discard = 0;
- if (saved_undo_list)
- {
- dispose_redirects (saved_undo_list);
- discard = 1;
- }
- redirection_undo_list = exec_redirection_undo_list;
- saved_undo_list = exec_redirection_undo_list = (REDIRECT *)NULL;
- if (discard)
- discard_unwind_frame ("saved redirects");
- }
-
- if (saved_undo_list)
- {
- redirection_undo_list = saved_undo_list;
- discard_unwind_frame ("saved redirects");
- }
-
- if (redirection_undo_list)
- {
- cleanup_redirects (redirection_undo_list);
- redirection_undo_list = (REDIRECT *)NULL;
- }
-
-#if defined (PROCESS_SUBSTITUTION)
- /* Close any FIFOs created by this builtin or function. */
- nfifo = num_fifos ();
- if (nfifo > ofifo)
- close_new_fifos (ofifo_list, osize);
- free (ofifo_list);
-#endif
-
- return (result);
-}
-
-void
-setup_async_signals ()
-{
-#if defined (__BEOS__)
- set_signal_handler (SIGHUP, SIG_IGN); /* they want csh-like behavior */
-#endif
-
-#if defined (JOB_CONTROL)
- if (job_control == 0)
-#endif
- {
- set_signal_handler (SIGINT, SIG_IGN);
- set_signal_ignored (SIGINT);
- set_signal_handler (SIGQUIT, SIG_IGN);
- set_signal_ignored (SIGQUIT);
- }
-}
-
-/* Execute a simple command that is hopefully defined in a disk file
- somewhere.
-
- 1) fork ()
- 2) connect pipes
- 3) look up the command
- 4) do redirections
- 5) execve ()
- 6) If the execve failed, see if the file has executable mode set.
- If so, and it isn't a directory, then execute its contents as
- a shell script.
-
- Note that the filename hashing stuff has to take place up here,
- in the parent. This is probably why the Bourne style shells
- don't handle it, since that would require them to go through
- this gnarly hair, for no good reason.
-
- NOTE: callers expect this to fork or exit(). */
-
-/* Name of a shell function to call when a command name is not found. */
-#ifndef NOTFOUND_HOOK
-# define NOTFOUND_HOOK "command_not_found_handle"
-#endif
-
-static int
-execute_disk_command (words, redirects, command_line, pipe_in, pipe_out,
- async, fds_to_close, cmdflags)
- WORD_LIST *words;
- REDIRECT *redirects;
- char *command_line;
- int pipe_in, pipe_out, async;
- struct fd_bitmap *fds_to_close;
- int cmdflags;
-{
- char *pathname, *command, **args;
- int nofork, result;
- pid_t pid;
- SHELL_VAR *hookf;
- WORD_LIST *wl;
-
- nofork = (cmdflags & CMD_NO_FORK); /* Don't fork, just exec, if no pipes */
- pathname = words->word->word;
-
- result = EXECUTION_SUCCESS;
-#if defined (RESTRICTED_SHELL)
- command = (char *)NULL;
- if (restricted && mbschr (pathname, '/'))
- {
- internal_error (_("%s: restricted: cannot specify `/' in command names"),
- pathname);
- result = last_command_exit_value = EXECUTION_FAILURE;
-
- /* If we're not going to fork below, we must already be in a child
- process or a context in which it's safe to call exit(2). */
- if (nofork && pipe_in == NO_PIPE && pipe_out == NO_PIPE)
- exit (last_command_exit_value);
- else
- goto parent_return;
- }
-#endif /* RESTRICTED_SHELL */
-
- command = search_for_command (pathname);
-
- if (command)
- {
- maybe_make_export_env ();
- put_command_name_into_env (command);
- }
-
- /* We have to make the child before we check for the non-existence
- of COMMAND, since we want the error messages to be redirected. */
- /* If we can get away without forking and there are no pipes to deal with,
- don't bother to fork, just directly exec the command. */
- if (nofork && pipe_in == NO_PIPE && pipe_out == NO_PIPE)
- pid = 0;
- else
- pid = make_child (savestring (command_line), async);
-
- if (pid == 0)
- {
- int old_interactive;
-
-#if 0
- /* This has been disabled for the time being. */
-#if !defined (ARG_MAX) || ARG_MAX >= 10240
- if (posixly_correct == 0)
- put_gnu_argv_flags_into_env ((long)getpid (), glob_argv_flags);
-#endif
-#endif
-
- reset_terminating_signals (); /* XXX */
- /* Cancel traps, in trap.c. */
- restore_original_signals ();
-
- /* restore_original_signals may have undone the work done
- by make_child to ensure that SIGINT and SIGQUIT are ignored
- in asynchronous children. */
- if (async)
- {
- if ((cmdflags & CMD_STDIN_REDIR) &&
- pipe_in == NO_PIPE &&
- (stdin_redirects (redirects) == 0))
- async_redirect_stdin ();
- setup_async_signals ();
- }
-
- /* This functionality is now provided by close-on-exec of the
- file descriptors manipulated by redirection and piping.
- Some file descriptors still need to be closed in all children
- because of the way bash does pipes; fds_to_close is a
- bitmap of all such file descriptors. */
- if (fds_to_close)
- close_fd_bitmap (fds_to_close);
-
- do_piping (pipe_in, pipe_out);
-
- old_interactive = interactive;
- if (async)
- interactive = 0;
-
- subshell_environment = SUBSHELL_FORK;
-
- if (redirects && (do_redirections (redirects, RX_ACTIVE) != 0))
- {
-#if defined (PROCESS_SUBSTITUTION)
- /* Try to remove named pipes that may have been created as the
- result of redirections. */
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
- exit (EXECUTION_FAILURE);
- }
-
- if (async)
- interactive = old_interactive;
-
- if (command == 0)
- {
- hookf = find_function (NOTFOUND_HOOK);
- if (hookf == 0)
- {
- /* Make sure filenames are displayed using printable characters */
- if (ansic_shouldquote (pathname))
- pathname = ansic_quote (pathname, 0, NULL);
- internal_error (_("%s: command not found"), pathname);
- exit (EX_NOTFOUND); /* Posix.2 says the exit status is 127 */
- }
-
- wl = make_word_list (make_word (NOTFOUND_HOOK), words);
- exit (execute_shell_function (hookf, wl));
- }
-
- /* Execve expects the command name to be in args[0]. So we
- leave it there, in the same format that the user used to
- type it in. */
- args = strvec_from_word_list (words, 0, 0, (int *)NULL);
- exit (shell_execve (command, args, export_env));
- }
- else
- {
-parent_return:
- /* Make sure that the pipes are closed in the parent. */
- close_pipes (pipe_in, pipe_out);
-#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
- if (variable_context == 0)
- unlink_fifo_list ();
-#endif
- FREE (command);
- return (result);
- }
-}
-
-/* CPP defines to decide whether a particular index into the #! line
- corresponds to a valid interpreter name or argument character, or
- whitespace. The MSDOS define is to allow \r to be treated the same
- as \n. */
-
-#if !defined (MSDOS)
-# define STRINGCHAR(ind) \
- (ind < sample_len && !whitespace (sample[ind]) && sample[ind] != '\n')
-# define WHITECHAR(ind) \
- (ind < sample_len && whitespace (sample[ind]))
-#else /* MSDOS */
-# define STRINGCHAR(ind) \
- (ind < sample_len && !whitespace (sample[ind]) && sample[ind] != '\n' && sample[ind] != '\r')
-# define WHITECHAR(ind) \
- (ind < sample_len && whitespace (sample[ind]))
-#endif /* MSDOS */
-
-static char *
-getinterp (sample, sample_len, endp)
- char *sample;
- int sample_len, *endp;
-{
- register int i;
- char *execname;
- int start;
-
- /* Find the name of the interpreter to exec. */
- for (i = 2; i < sample_len && whitespace (sample[i]); i++)
- ;
-
- for (start = i; STRINGCHAR(i); i++)
- ;
-
- execname = substring (sample, start, i);
-
- if (endp)
- *endp = i;
- return execname;
-}
-
-#if !defined (HAVE_HASH_BANG_EXEC)
-/* If the operating system on which we're running does not handle
- the #! executable format, then help out. SAMPLE is the text read
- from the file, SAMPLE_LEN characters. COMMAND is the name of
- the script; it and ARGS, the arguments given by the user, will
- become arguments to the specified interpreter. ENV is the environment
- to pass to the interpreter.
-
- The word immediately following the #! is the interpreter to execute.
- A single argument to the interpreter is allowed. */
-
-static int
-execute_shell_script (sample, sample_len, command, args, env)
- char *sample;
- int sample_len;
- char *command;
- char **args, **env;
-{
- char *execname, *firstarg;
- int i, start, size_increment, larry;
-
- /* Find the name of the interpreter to exec. */
- execname = getinterp (sample, sample_len, &i);
- size_increment = 1;
-
- /* Now the argument, if any. */
- for (firstarg = (char *)NULL, start = i; WHITECHAR(i); i++)
- ;
-
- /* If there is more text on the line, then it is an argument for the
- interpreter. */
-
- if (STRINGCHAR(i))
- {
- for (start = i; STRINGCHAR(i); i++)
- ;
- firstarg = substring ((char *)sample, start, i);
- size_increment = 2;
- }
-
- larry = strvec_len (args) + size_increment;
- args = strvec_resize (args, larry + 1);
-
- for (i = larry - 1; i; i--)
- args[i] = args[i - size_increment];
-
- args[0] = execname;
- if (firstarg)
- {
- args[1] = firstarg;
- args[2] = command;
- }
- else
- args[1] = command;
-
- args[larry] = (char *)NULL;
-
- return (shell_execve (execname, args, env));
-}
-#undef STRINGCHAR
-#undef WHITECHAR
-
-#endif /* !HAVE_HASH_BANG_EXEC */
-
-static void
-initialize_subshell ()
-{
-#if defined (ALIAS)
- /* Forget about any aliases that we knew of. We are in a subshell. */
- delete_all_aliases ();
-#endif /* ALIAS */
-
-#if defined (HISTORY)
- /* Forget about the history lines we have read. This is a non-interactive
- subshell. */
- history_lines_this_session = 0;
-#endif
-
-#if defined (JOB_CONTROL)
- /* Forget about the way job control was working. We are in a subshell. */
- without_job_control ();
- set_sigchld_handler ();
- init_job_stats ();
-#endif /* JOB_CONTROL */
-
- /* Reset the values of the shell flags and options. */
- reset_shell_flags ();
- reset_shell_options ();
- reset_shopt_options ();
-
- /* Zero out builtin_env, since this could be a shell script run from a
- sourced file with a temporary environment supplied to the `source/.'
- builtin. Such variables are not supposed to be exported (empirical
- testing with sh and ksh). Just throw it away; don't worry about a
- memory leak. */
- if (vc_isbltnenv (shell_variables))
- shell_variables = shell_variables->down;
-
- clear_unwind_protect_list (0);
- /* XXX -- are there other things we should be resetting here? */
- parse_and_execute_level = 0; /* nothing left to restore it */
-
- /* We're no longer inside a shell function. */
- variable_context = return_catch_flag = funcnest = 0;
-
- executing_list = 0; /* XXX */
-
- /* If we're not interactive, close the file descriptor from which we're
- reading the current shell script. */
- if (interactive_shell == 0)
- unset_bash_input (0);
-}
-
-#if defined (HAVE_SETOSTYPE) && defined (_POSIX_SOURCE)
-# define SETOSTYPE(x) __setostype(x)
-#else
-# define SETOSTYPE(x)
-#endif
-
-#define READ_SAMPLE_BUF(file, buf, len) \
- do \
- { \
- fd = open(file, O_RDONLY); \
- if (fd >= 0) \
- { \
- len = read (fd, buf, 80); \
- close (fd); \
- } \
- else \
- len = -1; \
- } \
- while (0)
-
-/* Call execve (), handling interpreting shell scripts, and handling
- exec failures. */
-int
-shell_execve (command, args, env)
- char *command;
- char **args, **env;
-{
- int larray, i, fd;
- char sample[80];
- int sample_len;
-
- SETOSTYPE (0); /* Some systems use for USG/POSIX semantics */
- execve (command, args, env);
- i = errno; /* error from execve() */
- CHECK_TERMSIG;
- SETOSTYPE (1);
-
- /* If we get to this point, then start checking out the file.
- Maybe it is something we can hack ourselves. */
- if (i != ENOEXEC)
- {
- if (file_isdir (command))
-#if defined (EISDIR)
- internal_error (_("%s: %s"), command, strerror (EISDIR));
-#else
- internal_error (_("%s: is a directory"), command);
-#endif
- else if (executable_file (command) == 0)
- {
- errno = i;
- file_error (command);
- }
- /* errors not involving the path argument to execve. */
- else if (i == E2BIG || i == ENOMEM)
- {
- errno = i;
- file_error (command);
- }
- else
- {
- /* The file has the execute bits set, but the kernel refuses to
- run it for some reason. See why. */
-#if defined (HAVE_HASH_BANG_EXEC)
- READ_SAMPLE_BUF (command, sample, sample_len);
- if (sample_len > 2 && sample[0] == '#' && sample[1] == '!')
- {
- char *interp;
- int ilen;
-
- interp = getinterp (sample, sample_len, (int *)NULL);
- ilen = strlen (interp);
- errno = i;
- if (interp[ilen - 1] == '\r')
- {
- interp = xrealloc (interp, ilen + 2);
- interp[ilen - 1] = '^';
- interp[ilen] = 'M';
- interp[ilen + 1] = '\0';
- }
- sys_error (_("%s: %s: bad interpreter"), command, interp ? interp : "");
- FREE (interp);
- return (EX_NOEXEC);
- }
-#endif
- errno = i;
- file_error (command);
- }
- return ((i == ENOENT) ? EX_NOTFOUND : EX_NOEXEC); /* XXX Posix.2 says that exit status is 126 */
- }
-
- /* This file is executable.
- If it begins with #!, then help out people with losing operating
- systems. Otherwise, check to see if it is a binary file by seeing
- if the contents of the first line (or up to 80 characters) are in the
- ASCII set. If it's a text file, execute the contents as shell commands,
- otherwise return 126 (EX_BINARY_FILE). */
- READ_SAMPLE_BUF (command, sample, sample_len);
-
- if (sample_len == 0)
- return (EXECUTION_SUCCESS);
-
- /* Is this supposed to be an executable script?
- If so, the format of the line is "#! interpreter [argument]".
- A single argument is allowed. The BSD kernel restricts
- the length of the entire line to 32 characters (32 bytes
- being the size of the BSD exec header), but we allow 80
- characters. */
- if (sample_len > 0)
- {
-#if !defined (HAVE_HASH_BANG_EXEC)
- if (sample_len > 2 && sample[0] == '#' && sample[1] == '!')
- return (execute_shell_script (sample, sample_len, command, args, env));
- else
-#endif
- if (check_binary_file (sample, sample_len))
- {
- internal_error (_("%s: cannot execute binary file"), command);
- return (EX_BINARY_FILE);
- }
- }
-
- /* We have committed to attempting to execute the contents of this file
- as shell commands. */
-
- initialize_subshell ();
-
- set_sigint_handler ();
-
- /* Insert the name of this shell into the argument list. */
- larray = strvec_len (args) + 1;
- args = strvec_resize (args, larray + 1);
-
- for (i = larray - 1; i; i--)
- args[i] = args[i - 1];
-
- args[0] = shell_name;
- args[1] = command;
- args[larray] = (char *)NULL;
-
- if (args[0][0] == '-')
- args[0]++;
-
-#if defined (RESTRICTED_SHELL)
- if (restricted)
- change_flag ('r', FLAG_OFF);
-#endif
-
- if (subshell_argv)
- {
- /* Can't free subshell_argv[0]; that is shell_name. */
- for (i = 1; i < subshell_argc; i++)
- free (subshell_argv[i]);
- free (subshell_argv);
- }
-
- dispose_command (currently_executing_command); /* XXX */
- currently_executing_command = (COMMAND *)NULL;
-
- subshell_argc = larray;
- subshell_argv = args;
- subshell_envp = env;
-
- unbind_args (); /* remove the positional parameters */
-
- longjmp (subshell_top_level, 1);
- /*NOTREACHED*/
-}
-
-static int
-execute_intern_function (name, function)
- WORD_DESC *name;
- COMMAND *function;
-{
- SHELL_VAR *var;
-
- if (check_identifier (name, posixly_correct) == 0)
- {
- if (posixly_correct && interactive_shell == 0)
- {
- last_command_exit_value = EX_BADUSAGE;
- jump_to_top_level (ERREXIT);
- }
- return (EXECUTION_FAILURE);
- }
-
- var = find_function (name->word);
- if (var && (readonly_p (var) || noassign_p (var)))
- {
- if (readonly_p (var))
- internal_error (_("%s: readonly function"), var->name);
- return (EXECUTION_FAILURE);
- }
-
- bind_function (name->word, function);
- return (EXECUTION_SUCCESS);
-}
-
-#if defined (INCLUDE_UNUSED)
-#if defined (PROCESS_SUBSTITUTION)
-void
-close_all_files ()
-{
- register int i, fd_table_size;
-
- fd_table_size = getdtablesize ();
- if (fd_table_size > 256) /* clamp to a reasonable value */
- fd_table_size = 256;
-
- for (i = 3; i < fd_table_size; i++)
- close (i);
-}
-#endif /* PROCESS_SUBSTITUTION */
-#endif
-
-static void
-close_pipes (in, out)
- int in, out;
-{
- if (in >= 0)
- close (in);
- if (out >= 0)
- close (out);
-}
-
-static void
-dup_error (oldd, newd)
- int oldd, newd;
-{
- sys_error (_("cannot duplicate fd %d to fd %d"), oldd, newd);
-}
-
-/* Redirect input and output to be from and to the specified pipes.
- NO_PIPE and REDIRECT_BOTH are handled correctly. */
-static void
-do_piping (pipe_in, pipe_out)
- int pipe_in, pipe_out;
-{
- if (pipe_in != NO_PIPE)
- {
- if (dup2 (pipe_in, 0) < 0)
- dup_error (pipe_in, 0);
- if (pipe_in > 0)
- close (pipe_in);
-#ifdef __CYGWIN__
- /* Let stdio know the fd may have changed from text to binary mode. */
- freopen (NULL, "r", stdin);
-#endif /* __CYGWIN__ */
- }
- if (pipe_out != NO_PIPE)
- {
- if (pipe_out != REDIRECT_BOTH)
- {
- if (dup2 (pipe_out, 1) < 0)
- dup_error (pipe_out, 1);
- if (pipe_out == 0 || pipe_out > 1)
- close (pipe_out);
- }
- else
- {
- if (dup2 (1, 2) < 0)
- dup_error (1, 2);
- }
-#ifdef __CYGWIN__
- /* Let stdio know the fd may have changed from text to binary mode, and
- make sure to preserve stdout line buffering. */
- freopen (NULL, "w", stdout);
- sh_setlinebuf (stdout);
-#endif /* __CYGWIN__ */
- }
-}
+++ /dev/null
-/* shmbutil.h -- utility functions for multibyte characters. */
-
-/* Copyright (C) 2002-2004 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined (_SH_MBUTIL_H_)
-#define _SH_MBUTIL_H_
-
-#include "stdc.h"
-
-/* Include config.h for HANDLE_MULTIBYTE */
-#include <config.h>
-
-#if defined (HANDLE_MULTIBYTE)
-#include "shmbchar.h"
-
-extern size_t xmbsrtowcs __P((wchar_t *, const char **, size_t, mbstate_t *));
-extern size_t xdupmbstowcs __P((wchar_t **, char ***, const char *));
-
-extern size_t mbstrlen __P((const char *));
-
-extern char *xstrchr __P((const char *, int));
-
-#ifndef MB_INVALIDCH
-#define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2)
-#define MB_NULLWCH(x) ((x) == 0)
-#endif
-
-#define MBSLEN(s) (((s) && (s)[0]) ? ((s)[1] ? mbstrlen (s) : 1) : 0)
-#define MB_STRLEN(s) ((MB_CUR_MAX > 1) ? MBSLEN (s) : STRLEN (s))
-
-#define MBLEN(s, n) ((MB_CUR_MAX > 1) ? mblen ((s), (n)) : 1)
-#define MBRLEN(s, n, p) ((MB_CUR_MAX > 1) ? mbrlen ((s), (n), (p)) : 1)
-
-#else /* !HANDLE_MULTIBYTE */
-
-#undef MB_LEN_MAX
-#undef MB_CUR_MAX
-
-#define MB_LEN_MAX 1
-#define MB_CUR_MAX 1
-
-#undef xstrchr
-#define xstrchr(s, c) strchr(s, c)
-
-#ifndef MB_INVALIDCH
-#define MB_INVALIDCH(x) (0)
-#define MB_NULLWCH(x) (0)
-#endif
-
-#define MB_STRLEN(s) (STRLEN(s))
-
-#define MBLEN(s, n) 1
-#define MBRLEN(s, n, p) 1
-
-#ifndef wchar_t
-# define wchar_t int
-#endif
-
-#endif /* !HANDLE_MULTIBYTE */
-
-/* Declare and initialize a multibyte state. Call must be terminated
- with `;'. */
-#if defined (HANDLE_MULTIBYTE)
-# define DECLARE_MBSTATE \
- mbstate_t state; \
- memset (&state, '\0', sizeof (mbstate_t))
-#else
-# define DECLARE_MBSTATE
-#endif /* !HANDLE_MULTIBYTE */
-
-/* Initialize or reinitialize a multibyte state named `state'. Call must be
- terminated with `;'. */
-#if defined (HANDLE_MULTIBYTE)
-# define INITIALIZE_MBSTATE memset (&state, '\0', sizeof (mbstate_t))
-#else
-# define INITIALIZE_MBSTATE
-#endif /* !HANDLE_MULTIBYTE */
-
-/* Advance one (possibly multi-byte) character in string _STR of length
- _STRSIZE, starting at index _I. STATE must have already been declared. */
-#if defined (HANDLE_MULTIBYTE)
-# define ADVANCE_CHAR(_str, _strsize, _i) \
- do \
- { \
- if (locale_mb_cur_max > 1) \
- { \
- mbstate_t state_bak; \
- size_t mblength; \
- int _f; \
-\
- _f = is_basic ((_str)[_i]); \
- if (_f) \
- mblength = 1; \
- else \
- { \
- state_bak = state; \
- mblength = mbrlen ((_str) + (_i), (_strsize) - (_i), &state); \
- } \
-\
- if (mblength == (size_t)-2 || mblength == (size_t)-1) \
- { \
- state = state_bak; \
- (_i)++; \
- } \
- else if (mblength == 0) \
- (_i)++; \
- else \
- (_i) += mblength; \
- } \
- else \
- (_i)++; \
- } \
- while (0)
-#else
-# define ADVANCE_CHAR(_str, _strsize, _i) (_i)++
-#endif /* !HANDLE_MULTIBYTE */
-
-/* Advance one (possibly multibyte) character in the string _STR of length
- _STRSIZE.
- SPECIAL: assume that _STR will be incremented by 1 after this call. */
-#if defined (HANDLE_MULTIBYTE)
-# define ADVANCE_CHAR_P(_str, _strsize) \
- do \
- { \
- if (locale_mb_cur_max > 1) \
- { \
- mbstate_t state_bak; \
- size_t mblength; \
- int _f; \
-\
- _f = is_basic (*(_str)); \
- if (_f) \
- mblength = 1; \
- else \
- { \
- state_bak = state; \
- mblength = mbrlen ((_str), (_strsize), &state); \
- } \
-\
- if (mblength == (size_t)-2 || mblength == (size_t)-1) \
- { \
- state = state_bak; \
- mblength = 1; \
- } \
- else \
- (_str) += (mblength < 1) ? 0 : (mblength - 1); \
- } \
- } \
- while (0)
-#else
-# define ADVANCE_CHAR_P(_str, _strsize)
-#endif /* !HANDLE_MULTIBYTE */
-
-/* Back up one (possibly multi-byte) character in string _STR of length
- _STRSIZE, starting at index _I. STATE must have already been declared. */
-#if defined (HANDLE_MULTIBYTE)
-# define BACKUP_CHAR(_str, _strsize, _i) \
- do \
- { \
- if (locale_mb_cur_max > 1) \
- { \
- mbstate_t state_bak; \
- size_t mblength; \
- int _x, _p; /* _x == temp index into string, _p == prev index */ \
-\
- _x = _p = 0; \
- while (_x < (_i)) \
- { \
- state_bak = state; \
- mblength = mbrlen ((_str) + (_x), (_strsize) - (_x), &state); \
-\
- if (mblength == (size_t)-2 || mblength == (size_t)-1) \
- { \
- state = state_bak; \
- _x++; \
- } \
- else if (mblength == 0) \
- _x++; \
- else \
- { \
- _p = _x; /* _p == start of prev mbchar */ \
- _x += mblength; \
- } \
- } \
- (_i) = _p; \
- } \
- else \
- (_i)--; \
- } \
- while (0)
-#else
-# define BACKUP_CHAR(_str, _strsize, _i) (_i)--
-#endif /* !HANDLE_MULTIBYTE */
-
-/* Back up one (possibly multibyte) character in the string _BASE of length
- _STRSIZE starting at _STR (_BASE <= _STR <= (_BASE + _STRSIZE) ).
- SPECIAL: DO NOT assume that _STR will be decremented by 1 after this call. */
-#if defined (HANDLE_MULTIBYTE)
-# define BACKUP_CHAR_P(_base, _strsize, _str) \
- do \
- { \
- if (locale_mb_cur_max > 1) \
- { \
- mbstate_t state_bak; \
- size_t mblength; \
- char *_x, _p; /* _x == temp pointer into string, _p == prev pointer */ \
-\
- _x = _p = _base; \
- while (_x < (_str)) \
- { \
- state_bak = state; \
- mblength = mbrlen (_x, (_strsize) - _x, &state); \
-\
- if (mblength == (size_t)-2 || mblength == (size_t)-1) \
- { \
- state = state_bak; \
- _x++; \
- } \
- else if (mblength == 0) \
- _x++; \
- else \
- { \
- _p = _x; /* _p == start of prev mbchar */ \
- _x += mblength; \
- } \
- } \
- (_str) = _p; \
- } \
- else \
- (_str)--; \
- } \
- while (0)
-#else
-# define BACKUP_CHAR_P(_base, _strsize, _str) (_str)--
-#endif /* !HANDLE_MULTIBYTE */
-
-/* Copy a single character from the string _SRC to the string _DST.
- _SRCEND is a pointer to the end of _SRC. */
-#if defined (HANDLE_MULTIBYTE)
-# define COPY_CHAR_P(_dst, _src, _srcend) \
- do \
- { \
- if (locale_mb_cur_max > 1) \
- { \
- mbstate_t state_bak; \
- size_t mblength; \
- int _k; \
-\
- _k = is_basic (*(_src)); \
- if (_k) \
- mblength = 1; \
- else \
- { \
- state_bak = state; \
- mblength = mbrlen ((_src), (_srcend) - (_src), &state); \
- } \
- if (mblength == (size_t)-2 || mblength == (size_t)-1) \
- { \
- state = state_bak; \
- mblength = 1; \
- } \
- else \
- mblength = (mblength < 1) ? 1 : mblength; \
-\
- for (_k = 0; _k < mblength; _k++) \
- *(_dst)++ = *(_src)++; \
- } \
- else \
- *(_dst)++ = *(_src)++; \
- } \
- while (0)
-#else
-# define COPY_CHAR_P(_dst, _src, _srcend) *(_dst)++ = *(_src)++
-#endif /* !HANDLE_MULTIBYTE */
-
-/* Copy a single character from the string _SRC at index _SI to the string
- _DST at index _DI. _SRCEND is a pointer to the end of _SRC. */
-#if defined (HANDLE_MULTIBYTE)
-# define COPY_CHAR_I(_dst, _di, _src, _srcend, _si) \
- do \
- { \
- if (locale_mb_cur_max > 1) \
- { \
- mbstate_t state_bak; \
- size_t mblength; \
- int _k; \
-\
- _k = is_basic (*((_src) + (_si))); \
- if (_k) \
- mblength = 1; \
- else \
- {\
- state_bak = state; \
- mblength = mbrlen ((_src) + (_si), (_srcend) - ((_src)+(_si)), &state); \
- } \
- if (mblength == (size_t)-2 || mblength == (size_t)-1) \
- { \
- state = state_bak; \
- mblength = 1; \
- } \
- else \
- mblength = (mblength < 1) ? 1 : mblength; \
-\
- for (_k = 0; _k < mblength; _k++) \
- _dst[_di++] = _src[_si++]; \
- } \
- else \
- _dst[_di++] = _src[_si++]; \
- } \
- while (0)
-#else
-# define COPY_CHAR_I(_dst, _di, _src, _srcend, _si) _dst[_di++] = _src[_si++]
-#endif /* !HANDLE_MULTIBYTE */
-
-/****************************************************************
- * *
- * The following are only guaranteed to work in subst.c *
- * *
- ****************************************************************/
-
-#if defined (HANDLE_MULTIBYTE)
-# define SCOPY_CHAR_I(_dst, _escchar, _sc, _src, _si, _slen) \
- do \
- { \
- if (locale_mb_cur_max > 1) \
- { \
- mbstate_t state_bak; \
- size_t mblength; \
- int _i; \
-\
- _i = is_basic (*((_src) + (_si))); \
- if (_i) \
- mblength = 1; \
- else \
- { \
- state_bak = state; \
- mblength = mbrlen ((_src) + (_si), (_slen) - (_si), &state); \
- } \
- if (mblength == (size_t)-2 || mblength == (size_t)-1) \
- { \
- state = state_bak; \
- mblength = 1; \
- } \
- else \
- mblength = (mblength < 1) ? 1 : mblength; \
-\
- temp = xmalloc (mblength + 2); \
- temp[0] = _escchar; \
- for (_i = 0; _i < mblength; _i++) \
- temp[_i + 1] = _src[_si++]; \
- temp[mblength + 1] = '\0'; \
-\
- goto add_string; \
- } \
- else \
- { \
- _dst[0] = _escchar; \
- _dst[1] = _sc; \
- } \
- } \
- while (0)
-#else
-# define SCOPY_CHAR_I(_dst, _escchar, _sc, _src, _si, _slen) \
- _dst[0] = _escchar; \
- _dst[1] = _sc
-#endif /* !HANDLE_MULTIBYTE */
-
-#if defined (HANDLE_MULTIBYTE)
-# define SCOPY_CHAR_M(_dst, _src, _srcend, _si) \
- do \
- { \
- if (locale_mb_cur_max > 1) \
- { \
- mbstate_t state_bak; \
- size_t mblength; \
- int _i; \
-\
- _i = is_basic (*((_src) + (_si))); \
- if (_i) \
- mblength = 1; \
- else \
- { \
- state_bak = state; \
- mblength = mbrlen ((_src) + (_si), (_srcend) - ((_src) + (_si)), &state); \
- } \
- if (mblength == (size_t)-2 || mblength == (size_t)-1) \
- { \
- state = state_bak; \
- mblength = 1; \
- } \
- else \
- mblength = (mblength < 1) ? 1 : mblength; \
-\
- FASTCOPY(((_src) + (_si)), (_dst), mblength); \
-\
- (_dst) += mblength; \
- (_si) += mblength; \
- } \
- else \
- { \
- *(_dst)++ = _src[(_si)]; \
- (_si)++; \
- } \
- } \
- while (0)
-#else
-# define SCOPY_CHAR_M(_dst, _src, _srcend, _si) \
- *(_dst)++ = _src[(_si)]; \
- (_si)++
-#endif /* !HANDLE_MULTIBYTE */
-
-#if HANDLE_MULTIBYTE
-# define SADD_MBCHAR(_dst, _src, _si, _srcsize) \
- do \
- { \
- if (locale_mb_cur_max > 1) \
- { \
- int i; \
- mbstate_t state_bak; \
- size_t mblength; \
-\
- i = is_basic (*((_src) + (_si))); \
- if (i) \
- mblength = 1; \
- else \
- { \
- state_bak = state; \
- mblength = mbrlen ((_src) + (_si), (_srcsize) - (_si), &state); \
- } \
- if (mblength == (size_t)-1 || mblength == (size_t)-2) \
- { \
- state = state_bak; \
- mblength = 1; \
- } \
- if (mblength < 1) \
- mblength = 1; \
-\
- _dst = (char *)xmalloc (mblength + 1); \
- for (i = 0; i < mblength; i++) \
- (_dst)[i] = (_src)[(_si)++]; \
- (_dst)[mblength] = '\0'; \
-\
- goto add_string; \
- } \
- } \
- while (0)
-
-#else
-# define SADD_MBCHAR(_dst, _src, _si, _srcsize)
-#endif
-
-/* Watch out when using this -- it's just straight textual subsitution */
-#if defined (HANDLE_MULTIBYTE)
-# define SADD_MBQCHAR_BODY(_dst, _src, _si, _srcsize) \
-\
- int i; \
- mbstate_t state_bak; \
- size_t mblength; \
-\
- i = is_basic (*((_src) + (_si))); \
- if (i) \
- mblength = 1; \
- else \
- { \
- state_bak = state; \
- mblength = mbrlen ((_src) + (_si), (_srcsize) - (_si), &state); \
- } \
- if (mblength == (size_t)-1 || mblength == (size_t)-2) \
- { \
- state = state_bak; \
- mblength = 1; \
- } \
- if (mblength < 1) \
- mblength = 1; \
-\
- (_dst) = (char *)xmalloc (mblength + 2); \
- (_dst)[0] = CTLESC; \
- for (i = 0; i < mblength; i++) \
- (_dst)[i+1] = (_src)[(_si)++]; \
- (_dst)[mblength+1] = '\0'; \
-\
- goto add_string
-
-#endif /* HANDLE_MULTIBYTE */
-#endif /* _SH_MBUTIL_H_ */
+++ /dev/null
-/* jobs.c - functions that make children, remember them, and handle their termination. */
-
-/* This file works with both POSIX and BSD systems. It implements job
- control. */
-
-/* Copyright (C) 1989-2011 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#include "bashtypes.h"
-#include "trap.h"
-#include <stdio.h>
-#include <signal.h>
-#include <errno.h>
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include "posixtime.h"
-
-#if defined (HAVE_SYS_RESOURCE_H) && defined (HAVE_WAIT3) && !defined (_POSIX_VERSION) && !defined (RLIMTYPE)
-# include <sys/resource.h>
-#endif /* !_POSIX_VERSION && HAVE_SYS_RESOURCE_H && HAVE_WAIT3 && !RLIMTYPE */
-
-#if defined (HAVE_SYS_FILE_H)
-# include <sys/file.h>
-#endif
-
-#include "filecntl.h"
-#include <sys/ioctl.h>
-#include <sys/param.h>
-
-#if defined (BUFFERED_INPUT)
-# include "input.h"
-#endif
-
-/* Need to include this up here for *_TTY_DRIVER definitions. */
-#include "shtty.h"
-
-/* Define this if your output is getting swallowed. It's a no-op on
- machines with the termio or termios tty drivers. */
-/* #define DRAIN_OUTPUT */
-
-/* For the TIOCGPGRP and TIOCSPGRP ioctl parameters on HP-UX */
-#if defined (hpux) && !defined (TERMIOS_TTY_DRIVER)
-# include <bsdtty.h>
-#endif /* hpux && !TERMIOS_TTY_DRIVER */
-
-#include "bashansi.h"
-#include "bashintl.h"
-#include "shell.h"
-#include "jobs.h"
-#include "execute_cmd.h"
-#include "flags.h"
-
-#include "builtins/builtext.h"
-#include "builtins/common.h"
-
-#if !defined (errno)
-extern int errno;
-#endif /* !errno */
-
-#if !defined (HAVE_KILLPG)
-extern int killpg __P((pid_t, int));
-#endif
-
-#define DEFAULT_CHILD_MAX 32
-#if !defined (DEBUG)
-#define MAX_JOBS_IN_ARRAY 4096 /* production */
-#else
-#define MAX_JOBS_IN_ARRAY 128 /* testing */
-#endif
-
-/* Flag values for second argument to delete_job */
-#define DEL_WARNSTOPPED 1 /* warn about deleting stopped jobs */
-#define DEL_NOBGPID 2 /* don't add pgrp leader to bgpids */
-
-/* Take care of system dependencies that must be handled when waiting for
- children. The arguments to the WAITPID macro match those to the Posix.1
- waitpid() function. */
-
-#if defined (ultrix) && defined (mips) && defined (_POSIX_VERSION)
-# define WAITPID(pid, statusp, options) \
- wait3 ((union wait *)statusp, options, (struct rusage *)0)
-#else
-# if defined (_POSIX_VERSION) || defined (HAVE_WAITPID)
-# define WAITPID(pid, statusp, options) \
- waitpid ((pid_t)pid, statusp, options)
-# else
-# if defined (HAVE_WAIT3)
-# define WAITPID(pid, statusp, options) \
- wait3 (statusp, options, (struct rusage *)0)
-# else
-# define WAITPID(pid, statusp, options) \
- wait3 (statusp, options, (int *)0)
-# endif /* HAVE_WAIT3 */
-# endif /* !_POSIX_VERSION && !HAVE_WAITPID*/
-#endif /* !(Ultrix && mips && _POSIX_VERSION) */
-
-/* getpgrp () varies between systems. Even systems that claim to be
- Posix.1 compatible lie sometimes (Ultrix, SunOS4, apollo). */
-#if defined (GETPGRP_VOID)
-# define getpgid(p) getpgrp ()
-#else
-# define getpgid(p) getpgrp (p)
-#endif /* !GETPGRP_VOID */
-
-/* If the system needs it, REINSTALL_SIGCHLD_HANDLER will reinstall the
- handler for SIGCHLD. */
-#if defined (MUST_REINSTALL_SIGHANDLERS)
-# define REINSTALL_SIGCHLD_HANDLER signal (SIGCHLD, sigchld_handler)
-#else
-# define REINSTALL_SIGCHLD_HANDLER
-#endif /* !MUST_REINSTALL_SIGHANDLERS */
-
-/* Some systems let waitpid(2) tell callers about stopped children. */
-#if !defined (WCONTINUED) || defined (WCONTINUED_BROKEN)
-# undef WCONTINUED
-# define WCONTINUED 0
-#endif
-#if !defined (WIFCONTINUED)
-# define WIFCONTINUED(s) (0)
-#endif
-
-/* The number of additional slots to allocate when we run out. */
-#define JOB_SLOTS 8
-
-typedef int sh_job_map_func_t __P((JOB *, int, int, int));
-
-/* Variables used here but defined in other files. */
-extern int subshell_environment, line_number;
-extern int posixly_correct, shell_level;
-extern int last_command_exit_value, last_command_exit_signal;
-extern int loop_level, breaking;
-extern int executing_list;
-extern int sourcelevel;
-extern int running_trap;
-extern sh_builtin_func_t *this_shell_builtin;
-extern char *shell_name, *this_command_name;
-extern sigset_t top_level_mask;
-extern procenv_t wait_intr_buf;
-extern int wait_signal_received;
-extern WORD_LIST *subst_assign_varlist;
-
-static struct jobstats zerojs = { -1L, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NO_JOB, NO_JOB, 0, 0 };
-struct jobstats js = { -1L, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NO_JOB, NO_JOB, 0, 0 };
-
-struct bgpids bgpids = { 0, 0, 0 };
-
-/* The array of known jobs. */
-JOB **jobs = (JOB **)NULL;
-
-#if 0
-/* The number of slots currently allocated to JOBS. */
-int job_slots = 0;
-#endif
-
-/* The controlling tty for this shell. */
-int shell_tty = -1;
-
-/* The shell's process group. */
-pid_t shell_pgrp = NO_PID;
-
-/* The terminal's process group. */
-pid_t terminal_pgrp = NO_PID;
-
-/* The process group of the shell's parent. */
-pid_t original_pgrp = NO_PID;
-
-/* The process group of the pipeline currently being made. */
-pid_t pipeline_pgrp = (pid_t)0;
-
-#if defined (PGRP_PIPE)
-/* Pipes which each shell uses to communicate with the process group leader
- until all of the processes in a pipeline have been started. Then the
- process leader is allowed to continue. */
-int pgrp_pipe[2] = { -1, -1 };
-#endif
-
-#if 0
-/* The job which is current; i.e. the one that `%+' stands for. */
-int current_job = NO_JOB;
-
-/* The previous job; i.e. the one that `%-' stands for. */
-int previous_job = NO_JOB;
-#endif
-
-/* Last child made by the shell. */
-pid_t last_made_pid = NO_PID;
-
-/* Pid of the last asynchronous child. */
-pid_t last_asynchronous_pid = NO_PID;
-
-/* The pipeline currently being built. */
-PROCESS *the_pipeline = (PROCESS *)NULL;
-
-/* If this is non-zero, do job control. */
-int job_control = 1;
-
-/* Call this when you start making children. */
-int already_making_children = 0;
-
-/* If this is non-zero, $LINES and $COLUMNS are reset after every process
- exits from get_tty_state(). */
-int check_window_size;
-
-/* Functions local to this file. */
-
-static sighandler wait_sigint_handler __P((int));
-static sighandler sigchld_handler __P((int));
-static sighandler sigcont_sighandler __P((int));
-static sighandler sigstop_sighandler __P((int));
-
-static int waitchld __P((pid_t, int));
-
-static PROCESS *find_pipeline __P((pid_t, int, int *));
-static PROCESS *find_process __P((pid_t, int, int *));
-
-static char *current_working_directory __P((void));
-static char *job_working_directory __P((void));
-static char *j_strsignal __P((int));
-static char *printable_job_status __P((int, PROCESS *, int));
-
-static PROCESS *find_last_proc __P((int, int));
-static pid_t find_last_pid __P((int, int));
-
-static int set_new_line_discipline __P((int));
-static int map_over_jobs __P((sh_job_map_func_t *, int, int));
-static int job_last_stopped __P((int));
-static int job_last_running __P((int));
-static int most_recent_job_in_state __P((int, JOB_STATE));
-static int find_job __P((pid_t, int, PROCESS **));
-static int print_job __P((JOB *, int, int, int));
-static int process_exit_status __P((WAIT));
-static int process_exit_signal __P((WAIT));
-static int set_job_status_and_cleanup __P((int));
-
-static WAIT job_signal_status __P((int));
-static WAIT raw_job_exit_status __P((int));
-
-static void notify_of_job_status __P((void));
-static void reset_job_indices __P((void));
-static void cleanup_dead_jobs __P((void));
-static int processes_in_job __P((int));
-static void realloc_jobs_list __P((void));
-static int compact_jobs_list __P((int));
-static int discard_pipeline __P((PROCESS *));
-static void add_process __P((char *, pid_t));
-static void print_pipeline __P((PROCESS *, int, int, FILE *));
-static void pretty_print_job __P((int, int, FILE *));
-static void set_current_job __P((int));
-static void reset_current __P((void));
-static void set_job_running __P((int));
-static void setjstatus __P((int));
-static int maybe_give_terminal_to __P((pid_t, pid_t, int));
-static void mark_all_jobs_as_dead __P((void));
-static void mark_dead_jobs_as_notified __P((int));
-static void restore_sigint_handler __P((void));
-#if defined (PGRP_PIPE)
-static void pipe_read __P((int *));
-#endif
-
-static struct pidstat *bgp_alloc __P((pid_t, int));
-static struct pidstat *bgp_add __P((pid_t, int));
-static int bgp_delete __P((pid_t));
-static void bgp_clear __P((void));
-static int bgp_search __P((pid_t));
-static void bgp_prune __P((void));
-
-#if defined (ARRAY_VARS)
-static int *pstatuses; /* list of pipeline statuses */
-static int statsize;
-#endif
-
-/* Used to synchronize between wait_for and other functions and the SIGCHLD
- signal handler. */
-static int sigchld;
-static int queue_sigchld;
-
-#define QUEUE_SIGCHLD(os) (os) = sigchld, queue_sigchld++
-
-#define UNQUEUE_SIGCHLD(os) \
- do { \
- queue_sigchld--; \
- if (queue_sigchld == 0 && os != sigchld) \
- waitchld (-1, 0); \
- } while (0)
-
-static SigHandler *old_tstp, *old_ttou, *old_ttin;
-static SigHandler *old_cont = (SigHandler *)SIG_DFL;
-
-/* A place to temporarily save the current pipeline. */
-static PROCESS *saved_pipeline;
-static int saved_already_making_children;
-
-/* Set this to non-zero whenever you don't want the jobs list to change at
- all: no jobs deleted and no status change notifications. This is used,
- for example, when executing SIGCHLD traps, which may run arbitrary
- commands. */
-static int jobs_list_frozen;
-
-static char retcode_name_buffer[64];
-
-/* flags to detect pid wraparound */
-static pid_t first_pid = NO_PID;
-static int pid_wrap = -1;
-
-#if !defined (_POSIX_VERSION)
-
-/* These are definitions to map POSIX 1003.1 functions onto existing BSD
- library functions and system calls. */
-#define setpgid(pid, pgrp) setpgrp (pid, pgrp)
-#define tcsetpgrp(fd, pgrp) ioctl ((fd), TIOCSPGRP, &(pgrp))
-
-pid_t
-tcgetpgrp (fd)
- int fd;
-{
- pid_t pgrp;
-
- /* ioctl will handle setting errno correctly. */
- if (ioctl (fd, TIOCGPGRP, &pgrp) < 0)
- return (-1);
- return (pgrp);
-}
-
-#endif /* !_POSIX_VERSION */
-
-/* Initialize the global job stats structure and other bookkeeping variables */
-void
-init_job_stats ()
-{
- js = zerojs;
- first_pid = NO_PID;
- pid_wrap = -1;
-}
-
-/* Return the working directory for the current process. Unlike
- job_working_directory, this does not call malloc (), nor do any
- of the functions it calls. This is so that it can safely be called
- from a signal handler. */
-static char *
-current_working_directory ()
-{
- char *dir;
- static char d[PATH_MAX];
-
- dir = get_string_value ("PWD");
-
- if (dir == 0 && the_current_working_directory && no_symbolic_links)
- dir = the_current_working_directory;
-
- if (dir == 0)
- {
- dir = getcwd (d, sizeof(d));
- if (dir)
- dir = d;
- }
-
- return (dir == 0) ? "<unknown>" : dir;
-}
-
-/* Return the working directory for the current process. */
-static char *
-job_working_directory ()
-{
- char *dir;
-
- dir = get_string_value ("PWD");
- if (dir)
- return (savestring (dir));
-
- dir = get_working_directory ("job-working-directory");
- if (dir)
- return (dir);
-
- return (savestring ("<unknown>"));
-}
-
-void
-making_children ()
-{
- if (already_making_children)
- return;
-
- already_making_children = 1;
- start_pipeline ();
-}
-
-void
-stop_making_children ()
-{
- already_making_children = 0;
-}
-
-void
-cleanup_the_pipeline ()
-{
- PROCESS *disposer;
- sigset_t set, oset;
-
- BLOCK_CHILD (set, oset);
- disposer = the_pipeline;
- the_pipeline = (PROCESS *)NULL;
- UNBLOCK_CHILD (oset);
-
- if (disposer)
- discard_pipeline (disposer);
-}
-
-void
-save_pipeline (clear)
- int clear;
-{
- saved_pipeline = the_pipeline;
- if (clear)
- the_pipeline = (PROCESS *)NULL;
- saved_already_making_children = already_making_children;
-}
-
-void
-restore_pipeline (discard)
- int discard;
-{
- PROCESS *old_pipeline;
-
- old_pipeline = the_pipeline;
- the_pipeline = saved_pipeline;
- already_making_children = saved_already_making_children;
- if (discard && old_pipeline)
- discard_pipeline (old_pipeline);
-}
-
-/* Start building a pipeline. */
-void
-start_pipeline ()
-{
- if (the_pipeline)
- {
- cleanup_the_pipeline ();
- pipeline_pgrp = 0;
-#if defined (PGRP_PIPE)
- sh_closepipe (pgrp_pipe);
-#endif
- }
-
-#if defined (PGRP_PIPE)
- if (job_control)
- {
- if (pipe (pgrp_pipe) == -1)
- sys_error (_("start_pipeline: pgrp pipe"));
- }
-#endif
-}
-
-/* Stop building a pipeline. Install the process list in the job array.
- This returns the index of the newly installed job.
- DEFERRED is a command structure to be executed upon satisfactory
- execution exit of this pipeline. */
-int
-stop_pipeline (async, deferred)
- int async;
- COMMAND *deferred;
-{
- register int i, j;
- JOB *newjob;
- sigset_t set, oset;
-
- BLOCK_CHILD (set, oset);
-
-#if defined (PGRP_PIPE)
- /* The parent closes the process group synchronization pipe. */
- sh_closepipe (pgrp_pipe);
-#endif
-
- cleanup_dead_jobs ();
-
- if (js.j_jobslots == 0)
- {
- js.j_jobslots = JOB_SLOTS;
- jobs = (JOB **)xmalloc (js.j_jobslots * sizeof (JOB *));
-
- /* Now blank out these new entries. */
- for (i = 0; i < js.j_jobslots; i++)
- jobs[i] = (JOB *)NULL;
-
- js.j_firstj = js.j_lastj = js.j_njobs = 0;
- }
-
- /* Scan from the last slot backward, looking for the next free one. */
- /* XXX - revisit this interactive assumption */
- /* XXX - this way for now */
- if (interactive)
- {
- for (i = js.j_jobslots; i; i--)
- if (jobs[i - 1])
- break;
- }
- else
- {
-#if 0
- /* This wraps around, but makes it inconvenient to extend the array */
- for (i = js.j_lastj+1; i != js.j_lastj; i++)
- {
- if (i >= js.j_jobslots)
- i = 0;
- if (jobs[i] == 0)
- break;
- }
- if (i == js.j_lastj)
- i = js.j_jobslots;
-#else
- /* This doesn't wrap around yet. */
- for (i = js.j_lastj ? js.j_lastj + 1 : js.j_lastj; i < js.j_jobslots; i++)
- if (jobs[i] == 0)
- break;
-#endif
- }
-
- /* Do we need more room? */
-
- /* First try compaction */
- if ((interactive_shell == 0 || subshell_environment) && i == js.j_jobslots && js.j_jobslots >= MAX_JOBS_IN_ARRAY)
- i = compact_jobs_list (0);
-
- /* If we can't compact, reallocate */
- if (i == js.j_jobslots)
- {
- js.j_jobslots += JOB_SLOTS;
- jobs = (JOB **)xrealloc (jobs, (js.j_jobslots * sizeof (JOB *)));
-
- for (j = i; j < js.j_jobslots; j++)
- jobs[j] = (JOB *)NULL;
- }
-
- /* Add the current pipeline to the job list. */
- if (the_pipeline)
- {
- register PROCESS *p;
- int any_running, any_stopped, n;
-
- newjob = (JOB *)xmalloc (sizeof (JOB));
-
- for (n = 1, p = the_pipeline; p->next != the_pipeline; n++, p = p->next)
- ;
- p->next = (PROCESS *)NULL;
- newjob->pipe = REVERSE_LIST (the_pipeline, PROCESS *);
- for (p = newjob->pipe; p->next; p = p->next)
- ;
- p->next = newjob->pipe;
-
- the_pipeline = (PROCESS *)NULL;
- newjob->pgrp = pipeline_pgrp;
- pipeline_pgrp = 0;
-
- newjob->flags = 0;
-
- /* Flag to see if in another pgrp. */
- if (job_control)
- newjob->flags |= J_JOBCONTROL;
-
- /* Set the state of this pipeline. */
- p = newjob->pipe;
- any_running = any_stopped = 0;
- do
- {
- any_running |= PRUNNING (p);
- any_stopped |= PSTOPPED (p);
- p = p->next;
- }
- while (p != newjob->pipe);
-
- newjob->state = any_running ? JRUNNING : (any_stopped ? JSTOPPED : JDEAD);
- newjob->wd = job_working_directory ();
- newjob->deferred = deferred;
-
- newjob->j_cleanup = (sh_vptrfunc_t *)NULL;
- newjob->cleanarg = (PTR_T) NULL;
-
- jobs[i] = newjob;
- if (newjob->state == JDEAD && (newjob->flags & J_FOREGROUND))
- setjstatus (i);
- if (newjob->state == JDEAD)
- {
- js.c_reaped += n; /* wouldn't have been done since this was not part of a job */
- js.j_ndead++;
- }
- js.c_injobs += n;
-
- js.j_lastj = i;
- js.j_njobs++;
- }
- else
- newjob = (JOB *)NULL;
-
- if (newjob)
- js.j_lastmade = newjob;
-
- if (async)
- {
- if (newjob)
- {
- newjob->flags &= ~J_FOREGROUND;
- newjob->flags |= J_ASYNC;
- js.j_lastasync = newjob;
- }
- reset_current ();
- }
- else
- {
- if (newjob)
- {
- newjob->flags |= J_FOREGROUND;
- /*
- * !!!!! NOTE !!!!! (chet@ins.cwru.edu)
- *
- * The currently-accepted job control wisdom says to set the
- * terminal's process group n+1 times in an n-step pipeline:
- * once in the parent and once in each child. This is where
- * the parent gives it away.
- *
- * Don't give the terminal away if this shell is an asynchronous
- * subshell.
- *
- */
- if (job_control && newjob->pgrp && (subshell_environment&SUBSHELL_ASYNC) == 0)
- maybe_give_terminal_to (shell_pgrp, newjob->pgrp, 0);
- }
- }
-
- stop_making_children ();
- UNBLOCK_CHILD (oset);
- return (newjob ? i : js.j_current);
-}
-
-/* Functions to manage the list of exited background pids whose status has
- been saved. */
-
-static struct pidstat *
-bgp_alloc (pid, status)
- pid_t pid;
- int status;
-{
- struct pidstat *ps;
-
- ps = (struct pidstat *)xmalloc (sizeof (struct pidstat));
- ps->pid = pid;
- ps->status = status;
- ps->next = (struct pidstat *)0;
- return ps;
-}
-
-static struct pidstat *
-bgp_add (pid, status)
- pid_t pid;
- int status;
-{
- struct pidstat *ps;
-
- ps = bgp_alloc (pid, status);
-
- if (bgpids.list == 0)
- {
- bgpids.list = bgpids.end = ps;
- bgpids.npid = 0; /* just to make sure */
- }
- else
- {
- bgpids.end->next = ps;
- bgpids.end = ps;
- }
- bgpids.npid++;
-
- if (bgpids.npid > js.c_childmax)
- bgp_prune ();
-
- return ps;
-}
-
-static int
-bgp_delete (pid)
- pid_t pid;
-{
- struct pidstat *prev, *p;
-
- for (prev = p = bgpids.list; p; prev = p, p = p->next)
- if (p->pid == pid)
- {
- prev->next = p->next; /* remove from list */
- break;
- }
-
- if (p == 0)
- return 0; /* not found */
-
-#if defined (DEBUG)
- itrace("bgp_delete: deleting %d", pid);
-#endif
-
- /* Housekeeping in the border cases. */
- if (p == bgpids.list)
- bgpids.list = bgpids.list->next;
- else if (p == bgpids.end)
- bgpids.end = prev;
-
- bgpids.npid--;
- if (bgpids.npid == 0)
- bgpids.list = bgpids.end = 0;
- else if (bgpids.npid == 1)
- bgpids.end = bgpids.list; /* just to make sure */
-
- free (p);
- return 1;
-}
-
-/* Clear out the list of saved statuses */
-static void
-bgp_clear ()
-{
- struct pidstat *ps, *p;
-
- for (ps = bgpids.list; ps; )
- {
- p = ps;
- ps = ps->next;
- free (p);
- }
- bgpids.list = bgpids.end = 0;
- bgpids.npid = 0;
-}
-
-/* Search for PID in the list of saved background pids; return its status if
- found. If not found, return -1. */
-static int
-bgp_search (pid)
- pid_t pid;
-{
- struct pidstat *ps;
-
- for (ps = bgpids.list ; ps; ps = ps->next)
- if (ps->pid == pid)
- return ps->status;
- return -1;
-}
-
-static void
-bgp_prune ()
-{
- struct pidstat *ps;
-
- while (bgpids.npid > js.c_childmax)
- {
- ps = bgpids.list;
- bgpids.list = bgpids.list->next;
- free (ps);
- bgpids.npid--;
- }
-}
-
-/* Reset the values of js.j_lastj and js.j_firstj after one or both have
- been deleted. The caller should check whether js.j_njobs is 0 before
- calling this. This wraps around, but the rest of the code does not. At
- this point, it should not matter. */
-static void
-reset_job_indices ()
-{
- int old;
-
- if (jobs[js.j_firstj] == 0)
- {
- old = js.j_firstj++;
- if (old >= js.j_jobslots)
- old = js.j_jobslots - 1;
- while (js.j_firstj != old)
- {
- if (js.j_firstj >= js.j_jobslots)
- js.j_firstj = 0;
- if (jobs[js.j_firstj] || js.j_firstj == old) /* needed if old == 0 */
- break;
- js.j_firstj++;
- }
- if (js.j_firstj == old)
- js.j_firstj = js.j_lastj = js.j_njobs = 0;
- }
- if (jobs[js.j_lastj] == 0)
- {
- old = js.j_lastj--;
- if (old < 0)
- old = 0;
- while (js.j_lastj != old)
- {
- if (js.j_lastj < 0)
- js.j_lastj = js.j_jobslots - 1;
- if (jobs[js.j_lastj] || js.j_lastj == old) /* needed if old == js.j_jobslots */
- break;
- js.j_lastj--;
- }
- if (js.j_lastj == old)
- js.j_firstj = js.j_lastj = js.j_njobs = 0;
- }
-}
-
-/* Delete all DEAD jobs that the user had received notification about. */
-static void
-cleanup_dead_jobs ()
-{
- register int i;
- int os;
-
- if (js.j_jobslots == 0 || jobs_list_frozen)
- return;
-
- QUEUE_SIGCHLD(os);
-
- /* XXX could use js.j_firstj and js.j_lastj here */
- for (i = 0; i < js.j_jobslots; i++)
- {
-#if defined (DEBUG)
- if (i < js.j_firstj && jobs[i])
- itrace("cleanup_dead_jobs: job %d non-null before js.j_firstj (%d)", i, js.j_firstj);
- if (i > js.j_lastj && jobs[i])
- itrace("cleanup_dead_jobs: job %d non-null after js.j_lastj (%d)", i, js.j_lastj);
-#endif
-
- if (jobs[i] && DEADJOB (i) && IS_NOTIFIED (i))
- delete_job (i, 0);
- }
-
-#if defined (COPROCESS_SUPPORT)
- coproc_reap ();
-#endif
-
- UNQUEUE_SIGCHLD(os);
-}
-
-static int
-processes_in_job (job)
- int job;
-{
- int nproc;
- register PROCESS *p;
-
- nproc = 0;
- p = jobs[job]->pipe;
- do
- {
- p = p->next;
- nproc++;
- }
- while (p != jobs[job]->pipe);
-
- return nproc;
-}
-
-static void
-delete_old_job (pid)
- pid_t pid;
-{
- PROCESS *p;
- int job;
-
- job = find_job (pid, 0, &p);
- if (job != NO_JOB)
- {
-#ifdef DEBUG
- itrace ("delete_old_job: found pid %d in job %d with state %d", pid, job, jobs[job]->state);
-#endif
- if (JOBSTATE (job) == JDEAD)
- delete_job (job, DEL_NOBGPID);
- else
- {
- internal_warning (_("forked pid %d appears in running job %d"), pid, job);
- if (p)
- p->pid = 0;
- }
- }
-}
-
-/* Reallocate and compress the jobs list. This returns with a jobs array
- whose size is a multiple of JOB_SLOTS and can hold the current number of
- jobs. Heuristics are used to minimize the number of new reallocs. */
-static void
-realloc_jobs_list ()
-{
- sigset_t set, oset;
- int nsize, i, j, ncur, nprev;
- JOB **nlist;
-
- ncur = nprev = NO_JOB;
- nsize = ((js.j_njobs + JOB_SLOTS - 1) / JOB_SLOTS);
- nsize *= JOB_SLOTS;
- i = js.j_njobs % JOB_SLOTS;
- if (i == 0 || i > (JOB_SLOTS >> 1))
- nsize += JOB_SLOTS;
-
- BLOCK_CHILD (set, oset);
- nlist = (js.j_jobslots == nsize) ? jobs : (JOB **) xmalloc (nsize * sizeof (JOB *));
-
- js.c_reaped = js.j_ndead = 0;
- for (i = j = 0; i < js.j_jobslots; i++)
- if (jobs[i])
- {
- if (i == js.j_current)
- ncur = j;
- if (i == js.j_previous)
- nprev = j;
- nlist[j++] = jobs[i];
- if (jobs[i]->state == JDEAD)
- {
- js.j_ndead++;
- js.c_reaped += processes_in_job (i);
- }
- }
-
-#if defined (DEBUG)
- itrace ("realloc_jobs_list: resize jobs list from %d to %d", js.j_jobslots, nsize);
- itrace ("realloc_jobs_list: j_lastj changed from %d to %d", js.j_lastj, (j > 0) ? j - 1 : 0);
- itrace ("realloc_jobs_list: j_njobs changed from %d to %d", js.j_njobs, j);
- itrace ("realloc_jobs_list: js.j_ndead %d js.c_reaped %d", js.j_ndead, js.c_reaped);
-#endif
-
- js.j_firstj = 0;
- js.j_lastj = (j > 0) ? j - 1 : 0;
- js.j_njobs = j;
- js.j_jobslots = nsize;
-
- /* Zero out remaining slots in new jobs list */
- for ( ; j < nsize; j++)
- nlist[j] = (JOB *)NULL;
-
- if (jobs != nlist)
- {
- free (jobs);
- jobs = nlist;
- }
-
- if (ncur != NO_JOB)
- js.j_current = ncur;
- if (nprev != NO_JOB)
- js.j_previous = nprev;
-
- /* Need to reset these */
- if (js.j_current == NO_JOB || js.j_previous == NO_JOB || js.j_current > js.j_lastj || js.j_previous > js.j_lastj)
- reset_current ();
-
-#ifdef DEBUG
- itrace ("realloc_jobs_list: reset js.j_current (%d) and js.j_previous (%d)", js.j_current, js.j_previous);
-#endif
-
- UNBLOCK_CHILD (oset);
-}
-
-/* Compact the jobs list by removing dead jobs. Assumed that we have filled
- the jobs array to some predefined maximum. Called when the shell is not
- the foreground process (subshell_environment != 0). Returns the first
- available slot in the compacted list. If that value is js.j_jobslots, then
- the list needs to be reallocated. The jobs array may be in new memory if
- this returns > 0 and < js.j_jobslots. FLAGS is reserved for future use. */
-static int
-compact_jobs_list (flags)
- int flags;
-{
- if (js.j_jobslots == 0 || jobs_list_frozen)
- return js.j_jobslots;
-
- reap_dead_jobs ();
- realloc_jobs_list ();
-
-#ifdef DEBUG
- itrace("compact_jobs_list: returning %d", (js.j_lastj || jobs[js.j_lastj]) ? js.j_lastj + 1 : 0);
-#endif
-
- return ((js.j_lastj || jobs[js.j_lastj]) ? js.j_lastj + 1 : 0);
-}
-
-/* Delete the job at INDEX from the job list. Must be called
- with SIGCHLD blocked. */
-void
-delete_job (job_index, dflags)
- int job_index, dflags;
-{
- register JOB *temp;
- PROCESS *proc;
- int ndel;
-
- if (js.j_jobslots == 0 || jobs_list_frozen)
- return;
-
- if ((dflags & DEL_WARNSTOPPED) && subshell_environment == 0 && STOPPED (job_index))
- internal_warning (_("deleting stopped job %d with process group %ld"), job_index+1, (long)jobs[job_index]->pgrp);
- temp = jobs[job_index];
- if (temp == 0)
- return;
-
- if ((dflags & DEL_NOBGPID) == 0)
- {
- proc = find_last_proc (job_index, 0);
- /* Could do this just for J_ASYNC jobs, but we save all. */
- if (proc)
- bgp_add (proc->pid, process_exit_status (proc->status));
- }
-
- jobs[job_index] = (JOB *)NULL;
- if (temp == js.j_lastmade)
- js.j_lastmade = 0;
- else if (temp == js.j_lastasync)
- js.j_lastasync = 0;
-
- free (temp->wd);
- ndel = discard_pipeline (temp->pipe);
-
- js.c_injobs -= ndel;
- if (temp->state == JDEAD)
- {
- js.c_reaped -= ndel;
- js.j_ndead--;
- if (js.c_reaped < 0)
- {
-#ifdef DEBUG
- itrace("delete_job (%d pgrp %d): js.c_reaped (%d) < 0 ndel = %d js.j_ndead = %d", job_index, temp->pgrp, js.c_reaped, ndel, js.j_ndead);
-#endif
- js.c_reaped = 0;
- }
- }
-
- if (temp->deferred)
- dispose_command (temp->deferred);
-
- free (temp);
-
- js.j_njobs--;
- if (js.j_njobs == 0)
- js.j_firstj = js.j_lastj = 0;
- else if (jobs[js.j_firstj] == 0 || jobs[js.j_lastj] == 0)
- reset_job_indices ();
-
- if (job_index == js.j_current || job_index == js.j_previous)
- reset_current ();
-}
-
-/* Must be called with SIGCHLD blocked. */
-void
-nohup_job (job_index)
- int job_index;
-{
- register JOB *temp;
-
- if (js.j_jobslots == 0)
- return;
-
- if (temp = jobs[job_index])
- temp->flags |= J_NOHUP;
-}
-
-/* Get rid of the data structure associated with a process chain. */
-static int
-discard_pipeline (chain)
- register PROCESS *chain;
-{
- register PROCESS *this, *next;
- int n;
-
- this = chain;
- n = 0;
- do
- {
- next = this->next;
- FREE (this->command);
- free (this);
- n++;
- this = next;
- }
- while (this != chain);
-
- return n;
-}
-
-/* Add this process to the chain being built in the_pipeline.
- NAME is the command string that will be exec'ed later.
- PID is the process id of the child. */
-static void
-add_process (name, pid)
- char *name;
- pid_t pid;
-{
- PROCESS *t, *p;
-
-#if defined (RECYCLES_PIDS)
- int j;
- p = find_process (pid, 0, &j);
- if (p)
- {
-# ifdef DEBUG
- if (j == NO_JOB)
- internal_warning (_("add_process: process %5ld (%s) in the_pipeline"), (long)p->pid, p->command);
-# endif
- if (PALIVE (p))
- internal_warning (_("add_process: pid %5ld (%s) marked as still alive"), (long)p->pid, p->command);
- p->running = PS_RECYCLED; /* mark as recycled */
- }
-#endif
-
- t = (PROCESS *)xmalloc (sizeof (PROCESS));
- t->next = the_pipeline;
- t->pid = pid;
- WSTATUS (t->status) = 0;
- t->running = PS_RUNNING;
- t->command = name;
- the_pipeline = t;
-
- if (t->next == 0)
- t->next = t;
- else
- {
- p = t->next;
- while (p->next != t->next)
- p = p->next;
- p->next = t;
- }
-}
-
-/* Create a (dummy) PROCESS with NAME, PID, and STATUS, and make it the last
- process in jobs[JID]->pipe. Used by the lastpipe code. */
-void
-append_process (name, pid, status, jid)
- char *name;
- pid_t pid;
- int status;
- int jid;
-{
- PROCESS *t, *p;
-
- t = (PROCESS *)xmalloc (sizeof (PROCESS));
- t->next = (PROCESS *)NULL;
- t->pid = pid;
- /* set process exit status using offset discovered by configure */
- t->status = (status & 0xff) << WEXITSTATUS_OFFSET;
- t->running = PS_DONE;
- t->command = name;
-
- js.c_reaped++; /* XXX */
-
- for (p = jobs[jid]->pipe; p->next != jobs[jid]->pipe; p = p->next)
- ;
- p->next = t;
- t->next = jobs[jid]->pipe;
-}
-
-#if 0
-/* Take the last job and make it the first job. Must be called with
- SIGCHLD blocked. */
-int
-rotate_the_pipeline ()
-{
- PROCESS *p;
-
- if (the_pipeline->next == the_pipeline)
- return;
- for (p = the_pipeline; p->next != the_pipeline; p = p->next)
- ;
- the_pipeline = p;
-}
-
-/* Reverse the order of the processes in the_pipeline. Must be called with
- SIGCHLD blocked. */
-int
-reverse_the_pipeline ()
-{
- PROCESS *p, *n;
-
- if (the_pipeline->next == the_pipeline)
- return;
-
- for (p = the_pipeline; p->next != the_pipeline; p = p->next)
- ;
- p->next = (PROCESS *)NULL;
-
- n = REVERSE_LIST (the_pipeline, PROCESS *);
-
- the_pipeline = n;
- for (p = the_pipeline; p->next; p = p->next)
- ;
- p->next = the_pipeline;
-}
-#endif
-
-/* Map FUNC over the list of jobs. If FUNC returns non-zero,
- then it is time to stop mapping, and that is the return value
- for map_over_jobs. FUNC is called with a JOB, arg1, arg2,
- and INDEX. */
-static int
-map_over_jobs (func, arg1, arg2)
- sh_job_map_func_t *func;
- int arg1, arg2;
-{
- register int i;
- int result;
- sigset_t set, oset;
-
- if (js.j_jobslots == 0)
- return 0;
-
- BLOCK_CHILD (set, oset);
-
- /* XXX could use js.j_firstj here */
- for (i = result = 0; i < js.j_jobslots; i++)
- {
-#if defined (DEBUG)
- if (i < js.j_firstj && jobs[i])
- itrace("map_over_jobs: job %d non-null before js.j_firstj (%d)", i, js.j_firstj);
- if (i > js.j_lastj && jobs[i])
- itrace("map_over_jobs: job %d non-null after js.j_lastj (%d)", i, js.j_lastj);
-#endif
- if (jobs[i])
- {
- result = (*func)(jobs[i], arg1, arg2, i);
- if (result)
- break;
- }
- }
-
- UNBLOCK_CHILD (oset);
-
- return (result);
-}
-
-/* Cause all the jobs in the current pipeline to exit. */
-void
-terminate_current_pipeline ()
-{
- if (pipeline_pgrp && pipeline_pgrp != shell_pgrp)
- {
- killpg (pipeline_pgrp, SIGTERM);
- killpg (pipeline_pgrp, SIGCONT);
- }
-}
-
-/* Cause all stopped jobs to exit. */
-void
-terminate_stopped_jobs ()
-{
- register int i;
-
- /* XXX could use js.j_firstj here */
- for (i = 0; i < js.j_jobslots; i++)
- {
- if (jobs[i] && STOPPED (i))
- {
- killpg (jobs[i]->pgrp, SIGTERM);
- killpg (jobs[i]->pgrp, SIGCONT);
- }
- }
-}
-
-/* Cause all jobs, running or stopped, to receive a hangup signal. If
- a job is marked J_NOHUP, don't send the SIGHUP. */
-void
-hangup_all_jobs ()
-{
- register int i;
-
- /* XXX could use js.j_firstj here */
- for (i = 0; i < js.j_jobslots; i++)
- {
- if (jobs[i])
- {
- if (jobs[i]->flags & J_NOHUP)
- continue;
- killpg (jobs[i]->pgrp, SIGHUP);
- if (STOPPED (i))
- killpg (jobs[i]->pgrp, SIGCONT);
- }
- }
-}
-
-void
-kill_current_pipeline ()
-{
- stop_making_children ();
- start_pipeline ();
-}
-
-/* Return the pipeline that PID belongs to. Note that the pipeline
- doesn't have to belong to a job. Must be called with SIGCHLD blocked.
- If JOBP is non-null, return the index of the job containing PID. */
-static PROCESS *
-find_pipeline (pid, alive_only, jobp)
- pid_t pid;
- int alive_only;
- int *jobp; /* index into jobs list or NO_JOB */
-{
- int job;
- PROCESS *p;
-
- /* See if this process is in the pipeline that we are building. */
- if (jobp)
- *jobp = NO_JOB;
- if (the_pipeline)
- {
- p = the_pipeline;
- do
- {
- /* Return it if we found it. Don't ever return a recycled pid. */
- if (p->pid == pid && ((alive_only == 0 && PRECYCLED(p) == 0) || PALIVE(p)))
- return (p);
-
- p = p->next;
- }
- while (p != the_pipeline);
- }
-
- job = find_job (pid, alive_only, &p);
- if (jobp)
- *jobp = job;
- return (job == NO_JOB) ? (PROCESS *)NULL : jobs[job]->pipe;
-}
-
-/* Return the PROCESS * describing PID. If JOBP is non-null return the index
- into the jobs array of the job containing PID. Must be called with
- SIGCHLD blocked. */
-static PROCESS *
-find_process (pid, alive_only, jobp)
- pid_t pid;
- int alive_only;
- int *jobp; /* index into jobs list or NO_JOB */
-{
- PROCESS *p;
-
- p = find_pipeline (pid, alive_only, jobp);
- while (p && p->pid != pid)
- p = p->next;
- return p;
-}
-
-/* Return the job index that PID belongs to, or NO_JOB if it doesn't
- belong to any job. Must be called with SIGCHLD blocked. */
-static int
-find_job (pid, alive_only, procp)
- pid_t pid;
- int alive_only;
- PROCESS **procp;
-{
- register int i;
- PROCESS *p;
-
- /* XXX could use js.j_firstj here, and should check js.j_lastj */
- for (i = 0; i < js.j_jobslots; i++)
- {
-#if defined (DEBUG)
- if (i < js.j_firstj && jobs[i])
- itrace("find_job: job %d non-null before js.j_firstj (%d)", i, js.j_firstj);
- if (i > js.j_lastj && jobs[i])
- itrace("find_job: job %d non-null after js.j_lastj (%d)", i, js.j_lastj);
-#endif
- if (jobs[i])
- {
- p = jobs[i]->pipe;
-
- do
- {
- if (p->pid == pid && ((alive_only == 0 && PRECYCLED(p) == 0) || PALIVE(p)))
- {
- if (procp)
- *procp = p;
- return (i);
- }
-
- p = p->next;
- }
- while (p != jobs[i]->pipe);
- }
- }
-
- return (NO_JOB);
-}
-
-/* Find a job given a PID. If BLOCK is non-zero, block SIGCHLD as
- required by find_job. */
-int
-get_job_by_pid (pid, block)
- pid_t pid;
- int block;
-{
- int job;
- sigset_t set, oset;
-
- if (block)
- BLOCK_CHILD (set, oset);
-
- job = find_job (pid, 0, NULL);
-
- if (block)
- UNBLOCK_CHILD (oset);
-
- return job;
-}
-
-/* Print descriptive information about the job with leader pid PID. */
-void
-describe_pid (pid)
- pid_t pid;
-{
- int job;
- sigset_t set, oset;
-
- BLOCK_CHILD (set, oset);
-
- job = find_job (pid, 0, NULL);
-
- if (job != NO_JOB)
- fprintf (stderr, "[%d] %ld\n", job + 1, (long)pid);
- else
- programming_error (_("describe_pid: %ld: no such pid"), (long)pid);
-
- UNBLOCK_CHILD (oset);
-}
-
-static char *
-j_strsignal (s)
- int s;
-{
- char *x;
-
- x = strsignal (s);
- if (x == 0)
- {
- x = retcode_name_buffer;
- sprintf (x, _("Signal %d"), s);
- }
- return x;
-}
-
-static char *
-printable_job_status (j, p, format)
- int j;
- PROCESS *p;
- int format;
-{
- static char *temp;
- int es;
-
- temp = _("Done");
-
- if (STOPPED (j) && format == 0)
- {
- if (posixly_correct == 0 || p == 0 || (WIFSTOPPED (p->status) == 0))
- temp = _("Stopped");
- else
- {
- temp = retcode_name_buffer;
- sprintf (temp, _("Stopped(%s)"), signal_name (WSTOPSIG (p->status)));
- }
- }
- else if (RUNNING (j))
- temp = _("Running");
- else
- {
- if (WIFSTOPPED (p->status))
- temp = j_strsignal (WSTOPSIG (p->status));
- else if (WIFSIGNALED (p->status))
- temp = j_strsignal (WTERMSIG (p->status));
- else if (WIFEXITED (p->status))
- {
- temp = retcode_name_buffer;
- es = WEXITSTATUS (p->status);
- if (es == 0)
- strcpy (temp, _("Done"));
- else if (posixly_correct)
- sprintf (temp, _("Done(%d)"), es);
- else
- sprintf (temp, _("Exit %d"), es);
- }
- else
- temp = _("Unknown status");
- }
-
- return temp;
-}
-
-/* This is the way to print out information on a job if you
- know the index. FORMAT is:
-
- JLIST_NORMAL) [1]+ Running emacs
- JLIST_LONG ) [1]+ 2378 Running emacs
- -1 ) [1]+ 2378 emacs
-
- JLIST_NORMAL) [1]+ Stopped ls | more
- JLIST_LONG ) [1]+ 2369 Stopped ls
- 2367 | more
- JLIST_PID_ONLY)
- Just list the pid of the process group leader (really
- the process group).
- JLIST_CHANGED_ONLY)
- Use format JLIST_NORMAL, but list only jobs about which
- the user has not been notified. */
-
-/* Print status for pipeline P. If JOB_INDEX is >= 0, it is the index into
- the JOBS array corresponding to this pipeline. FORMAT is as described
- above. Must be called with SIGCHLD blocked.
-
- If you're printing a pipeline that's not in the jobs array, like the
- current pipeline as it's being created, pass -1 for JOB_INDEX */
-static void
-print_pipeline (p, job_index, format, stream)
- PROCESS *p;
- int job_index, format;
- FILE *stream;
-{
- PROCESS *first, *last, *show;
- int es, name_padding;
- char *temp;
-
- if (p == 0)
- return;
-
- first = last = p;
- while (last->next != first)
- last = last->next;
-
- for (;;)
- {
- if (p != first)
- fprintf (stream, format ? " " : " |");
-
- if (format != JLIST_STANDARD)
- fprintf (stream, "%5ld", (long)p->pid);
-
- fprintf (stream, " ");
-
- if (format > -1 && job_index >= 0)
- {
- show = format ? p : last;
- temp = printable_job_status (job_index, show, format);
-
- if (p != first)
- {
- if (format)
- {
- if (show->running == first->running &&
- WSTATUS (show->status) == WSTATUS (first->status))
- temp = "";
- }
- else
- temp = (char *)NULL;
- }
-
- if (temp)
- {
- fprintf (stream, "%s", temp);
-
- es = STRLEN (temp);
- if (es == 0)
- es = 2; /* strlen ("| ") */
- name_padding = LONGEST_SIGNAL_DESC - es;
-
- fprintf (stream, "%*s", name_padding, "");
-
- if ((WIFSTOPPED (show->status) == 0) &&
- (WIFCONTINUED (show->status) == 0) &&
- WIFCORED (show->status))
- fprintf (stream, _("(core dumped) "));
- }
- }
-
- if (p != first && format)
- fprintf (stream, "| ");
-
- if (p->command)
- fprintf (stream, "%s", p->command);
-
- if (p == last && job_index >= 0)
- {
- temp = current_working_directory ();
-
- if (RUNNING (job_index) && (IS_FOREGROUND (job_index) == 0))
- fprintf (stream, " &");
-
- if (strcmp (temp, jobs[job_index]->wd) != 0)
- fprintf (stream,
- _(" (wd: %s)"), polite_directory_format (jobs[job_index]->wd));
- }
-
- if (format || (p == last))
- {
- /* We need to add a CR only if this is an interactive shell, and
- we're reporting the status of a completed job asynchronously.
- We can't really check whether this particular job is being
- reported asynchronously, so just add the CR if the shell is
- currently interactive and asynchronous notification is enabled. */
- if (asynchronous_notification && interactive)
- fprintf (stream, "\r\n");
- else
- fprintf (stream, "\n");
- }
-
- if (p == last)
- break;
- p = p->next;
- }
- fflush (stream);
-}
-
-/* Print information to STREAM about jobs[JOB_INDEX] according to FORMAT.
- Must be called with SIGCHLD blocked or queued with queue_sigchld */
-static void
-pretty_print_job (job_index, format, stream)
- int job_index, format;
- FILE *stream;
-{
- register PROCESS *p;
-
- /* Format only pid information about the process group leader? */
- if (format == JLIST_PID_ONLY)
- {
- fprintf (stream, "%ld\n", (long)jobs[job_index]->pipe->pid);
- return;
- }
-
- if (format == JLIST_CHANGED_ONLY)
- {
- if (IS_NOTIFIED (job_index))
- return;
- format = JLIST_STANDARD;
- }
-
- if (format != JLIST_NONINTERACTIVE)
- fprintf (stream, "[%d]%c ", job_index + 1,
- (job_index == js.j_current) ? '+':
- (job_index == js.j_previous) ? '-' : ' ');
-
- if (format == JLIST_NONINTERACTIVE)
- format = JLIST_LONG;
-
- p = jobs[job_index]->pipe;
-
- print_pipeline (p, job_index, format, stream);
-
- /* We have printed information about this job. When the job's
- status changes, waitchld () sets the notification flag to 0. */
- jobs[job_index]->flags |= J_NOTIFIED;
-}
-
-static int
-print_job (job, format, state, job_index)
- JOB *job;
- int format, state, job_index;
-{
- if (state == -1 || (JOB_STATE)state == job->state)
- pretty_print_job (job_index, format, stdout);
- return (0);
-}
-
-void
-list_one_job (job, format, ignore, job_index)
- JOB *job;
- int format, ignore, job_index;
-{
- pretty_print_job (job_index, format, stdout);
-}
-
-void
-list_stopped_jobs (format)
- int format;
-{
- cleanup_dead_jobs ();
- map_over_jobs (print_job, format, (int)JSTOPPED);
-}
-
-void
-list_running_jobs (format)
- int format;
-{
- cleanup_dead_jobs ();
- map_over_jobs (print_job, format, (int)JRUNNING);
-}
-
-/* List jobs. If FORMAT is non-zero, then the long form of the information
- is printed, else just a short version. */
-void
-list_all_jobs (format)
- int format;
-{
- cleanup_dead_jobs ();
- map_over_jobs (print_job, format, -1);
-}
-
-/* Fork, handling errors. Returns the pid of the newly made child, or 0.
- COMMAND is just for remembering the name of the command; we don't do
- anything else with it. ASYNC_P says what to do with the tty. If
- non-zero, then don't give it away. */
-pid_t
-make_child (command, async_p)
- char *command;
- int async_p;
-{
- int forksleep;
- sigset_t set, oset;
- pid_t pid;
-
- sigemptyset (&set);
- sigaddset (&set, SIGCHLD);
- sigaddset (&set, SIGINT);
- sigemptyset (&oset);
- sigprocmask (SIG_BLOCK, &set, &oset);
-
- making_children ();
-
- forksleep = 1;
-
-#if defined (BUFFERED_INPUT)
- /* If default_buffered_input is active, we are reading a script. If
- the command is asynchronous, we have already duplicated /dev/null
- as fd 0, but have not changed the buffered stream corresponding to
- the old fd 0. We don't want to sync the stream in this case. */
- if (default_buffered_input != -1 &&
- (!async_p || default_buffered_input > 0))
- sync_buffered_stream (default_buffered_input);
-#endif /* BUFFERED_INPUT */
-
- /* Create the child, handle severe errors. Retry on EAGAIN. */
- while ((pid = fork ()) < 0 && errno == EAGAIN && forksleep < FORKSLEEP_MAX)
- {
- /* bash-4.2 */
- /* If we can't create any children, try to reap some dead ones. */
- waitchld (-1, 0);
-
- sys_error ("fork: retry");
- if (sleep (forksleep) != 0)
- break;
- forksleep <<= 1;
- }
-
- if (pid < 0)
- {
- sys_error ("fork");
-
- /* Kill all of the processes in the current pipeline. */
- terminate_current_pipeline ();
-
- /* Discard the current pipeline, if any. */
- if (the_pipeline)
- kill_current_pipeline ();
-
- last_command_exit_value = EX_NOEXEC;
- throw_to_top_level (); /* Reset signals, etc. */
- }
-
- if (pid == 0)
- {
- /* In the child. Give this child the right process group, set the
- signals to the default state for a new process. */
- pid_t mypid;
-
- mypid = getpid ();
-#if defined (BUFFERED_INPUT)
- /* Close default_buffered_input if it's > 0. We don't close it if it's
- 0 because that's the file descriptor used when redirecting input,
- and it's wrong to close the file in that case. */
- unset_bash_input (0);
-#endif /* BUFFERED_INPUT */
-
- /* Restore top-level signal mask. */
- sigprocmask (SIG_SETMASK, &top_level_mask, (sigset_t *)NULL);
-
- if (job_control)
- {
- /* All processes in this pipeline belong in the same
- process group. */
-
- if (pipeline_pgrp == 0) /* This is the first child. */
- pipeline_pgrp = mypid;
-
- /* Check for running command in backquotes. */
- if (pipeline_pgrp == shell_pgrp)
- ignore_tty_job_signals ();
- else
- default_tty_job_signals ();
-
- /* Set the process group before trying to mess with the terminal's
- process group. This is mandated by POSIX. */
- /* This is in accordance with the Posix 1003.1 standard,
- section B.7.2.4, which says that trying to set the terminal
- process group with tcsetpgrp() to an unused pgrp value (like
- this would have for the first child) is an error. Section
- B.4.3.3, p. 237 also covers this, in the context of job control
- shells. */
- if (setpgid (mypid, pipeline_pgrp) < 0)
- sys_error (_("child setpgid (%ld to %ld)"), (long)mypid, (long)pipeline_pgrp);
-
- /* By convention (and assumption above), if
- pipeline_pgrp == shell_pgrp, we are making a child for
- command substitution.
- In this case, we don't want to give the terminal to the
- shell's process group (we could be in the middle of a
- pipeline, for example). */
- if (async_p == 0 && pipeline_pgrp != shell_pgrp && ((subshell_environment&SUBSHELL_ASYNC) == 0))
- give_terminal_to (pipeline_pgrp, 0);
-
-#if defined (PGRP_PIPE)
- if (pipeline_pgrp == mypid)
- pipe_read (pgrp_pipe);
-#endif
- }
- else /* Without job control... */
- {
- if (pipeline_pgrp == 0)
- pipeline_pgrp = shell_pgrp;
-
- /* If these signals are set to SIG_DFL, we encounter the curious
- situation of an interactive ^Z to a running process *working*
- and stopping the process, but being unable to do anything with
- that process to change its state. On the other hand, if they
- are set to SIG_IGN, jobs started from scripts do not stop when
- the shell running the script gets a SIGTSTP and stops. */
-
- default_tty_job_signals ();
- }
-
-#if defined (PGRP_PIPE)
- /* Release the process group pipe, since our call to setpgid ()
- is done. The last call to sh_closepipe is done in stop_pipeline. */
- sh_closepipe (pgrp_pipe);
-#endif /* PGRP_PIPE */
-
-#if 0
- /* Don't set last_asynchronous_pid in the child */
- if (async_p)
- last_asynchronous_pid = mypid; /* XXX */
- else
-#endif
-#if defined (RECYCLES_PIDS)
- if (last_asynchronous_pid == mypid)
- /* Avoid pid aliasing. 1 seems like a safe, unusual pid value. */
- last_asynchronous_pid = 1;
-#endif
- }
- else
- {
- /* In the parent. Remember the pid of the child just created
- as the proper pgrp if this is the first child. */
-
- if (first_pid == NO_PID)
- first_pid = pid;
- else if (pid_wrap == -1 && pid < first_pid)
- pid_wrap = 0;
- else if (pid_wrap == 0 && pid >= first_pid)
- pid_wrap = 1;
-
- if (job_control)
- {
- if (pipeline_pgrp == 0)
- {
- pipeline_pgrp = pid;
- /* Don't twiddle terminal pgrps in the parent! This is the bug,
- not the good thing of twiddling them in the child! */
- /* give_terminal_to (pipeline_pgrp, 0); */
- }
- /* This is done on the recommendation of the Rationale section of
- the POSIX 1003.1 standard, where it discusses job control and
- shells. It is done to avoid possible race conditions. (Ref.
- 1003.1 Rationale, section B.4.3.3, page 236). */
- setpgid (pid, pipeline_pgrp);
- }
- else
- {
- if (pipeline_pgrp == 0)
- pipeline_pgrp = shell_pgrp;
- }
-
- /* Place all processes into the jobs array regardless of the
- state of job_control. */
- add_process (command, pid);
-
- if (async_p)
- last_asynchronous_pid = pid;
-#if defined (RECYCLES_PIDS)
- else if (last_asynchronous_pid == pid)
- /* Avoid pid aliasing. 1 seems like a safe, unusual pid value. */
- last_asynchronous_pid = 1;
-#endif
-
- if (pid_wrap > 0)
- delete_old_job (pid);
-
-#if !defined (RECYCLES_PIDS)
- /* Only check for saved status if we've saved more than CHILD_MAX
- statuses, unless the system recycles pids. */
- if ((js.c_reaped + bgpids.npid) >= js.c_childmax)
-#endif
- bgp_delete (pid); /* new process, discard any saved status */
-
- last_made_pid = pid;
-
- /* keep stats */
- js.c_totforked++;
- js.c_living++;
-
- /* Unblock SIGINT and SIGCHLD unless creating a pipeline, in which case
- SIGCHLD remains blocked until all commands in the pipeline have been
- created. */
- sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL);
- }
-
- return (pid);
-}
-
-/* These two functions are called only in child processes. */
-void
-ignore_tty_job_signals ()
-{
- set_signal_handler (SIGTSTP, SIG_IGN);
- set_signal_handler (SIGTTIN, SIG_IGN);
- set_signal_handler (SIGTTOU, SIG_IGN);
-}
-
-void
-default_tty_job_signals ()
-{
- set_signal_handler (SIGTSTP, SIG_DFL);
- set_signal_handler (SIGTTIN, SIG_DFL);
- set_signal_handler (SIGTTOU, SIG_DFL);
-}
-
-/* When we end a job abnormally, or if we stop a job, we set the tty to the
- state kept in here. When a job ends normally, we set the state in here
- to the state of the tty. */
-
-static TTYSTRUCT shell_tty_info;
-
-#if defined (NEW_TTY_DRIVER)
-static struct tchars shell_tchars;
-static struct ltchars shell_ltchars;
-#endif /* NEW_TTY_DRIVER */
-
-#if defined (NEW_TTY_DRIVER) && defined (DRAIN_OUTPUT)
-/* Since the BSD tty driver does not allow us to change the tty modes
- while simultaneously waiting for output to drain and preserving
- typeahead, we have to drain the output ourselves before calling
- ioctl. We cheat by finding the length of the output queue, and
- using select to wait for an appropriate length of time. This is
- a hack, and should be labeled as such (it's a hastily-adapted
- mutation of a `usleep' implementation). It's only reason for
- existing is the flaw in the BSD tty driver. */
-
-static int ttspeeds[] =
-{
- 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
- 1800, 2400, 4800, 9600, 19200, 38400
-};
-
-static void
-draino (fd, ospeed)
- int fd, ospeed;
-{
- register int delay = ttspeeds[ospeed];
- int n;
-
- if (!delay)
- return;
-
- while ((ioctl (fd, TIOCOUTQ, &n) == 0) && n)
- {
- if (n > (delay / 100))
- {
- struct timeval tv;
-
- n *= 10; /* 2 bits more for conservativeness. */
- tv.tv_sec = n / delay;
- tv.tv_usec = ((n % delay) * 1000000) / delay;
- select (fd, (fd_set *)0, (fd_set *)0, (fd_set *)0, &tv);
- }
- else
- break;
- }
-}
-#endif /* NEW_TTY_DRIVER && DRAIN_OUTPUT */
-
-/* Return the fd from which we are actually getting input. */
-#define input_tty() (shell_tty != -1) ? shell_tty : fileno (stderr)
-
-/* Fill the contents of shell_tty_info with the current tty info. */
-int
-get_tty_state ()
-{
- int tty;
-
- tty = input_tty ();
- if (tty != -1)
- {
-#if defined (NEW_TTY_DRIVER)
- ioctl (tty, TIOCGETP, &shell_tty_info);
- ioctl (tty, TIOCGETC, &shell_tchars);
- ioctl (tty, TIOCGLTC, &shell_ltchars);
-#endif /* NEW_TTY_DRIVER */
-
-#if defined (TERMIO_TTY_DRIVER)
- ioctl (tty, TCGETA, &shell_tty_info);
-#endif /* TERMIO_TTY_DRIVER */
-
-#if defined (TERMIOS_TTY_DRIVER)
- if (tcgetattr (tty, &shell_tty_info) < 0)
- {
-#if 0
- /* Only print an error message if we're really interactive at
- this time. */
- if (interactive)
- sys_error ("[%ld: %d (%d)] tcgetattr", (long)getpid (), shell_level, tty);
-#endif
- return -1;
- }
-#endif /* TERMIOS_TTY_DRIVER */
- if (check_window_size)
- get_new_window_size (0, (int *)0, (int *)0);
- }
- return 0;
-}
-
-/* Make the current tty use the state in shell_tty_info. */
-int
-set_tty_state ()
-{
- int tty;
-
- tty = input_tty ();
- if (tty != -1)
- {
-#if defined (NEW_TTY_DRIVER)
-# if defined (DRAIN_OUTPUT)
- draino (tty, shell_tty_info.sg_ospeed);
-# endif /* DRAIN_OUTPUT */
- ioctl (tty, TIOCSETN, &shell_tty_info);
- ioctl (tty, TIOCSETC, &shell_tchars);
- ioctl (tty, TIOCSLTC, &shell_ltchars);
-#endif /* NEW_TTY_DRIVER */
-
-#if defined (TERMIO_TTY_DRIVER)
- ioctl (tty, TCSETAW, &shell_tty_info);
-#endif /* TERMIO_TTY_DRIVER */
-
-#if defined (TERMIOS_TTY_DRIVER)
- if (tcsetattr (tty, TCSADRAIN, &shell_tty_info) < 0)
- {
- /* Only print an error message if we're really interactive at
- this time. */
- if (interactive)
- sys_error ("[%ld: %d (%d)] tcsetattr", (long)getpid (), shell_level, tty);
- return -1;
- }
-#endif /* TERMIOS_TTY_DRIVER */
- }
- return 0;
-}
-
-/* Given an index into the jobs array JOB, return the PROCESS struct of the last
- process in that job's pipeline. This is the one whose exit status
- counts. Must be called with SIGCHLD blocked or queued. */
-static PROCESS *
-find_last_proc (job, block)
- int job;
- int block;
-{
- register PROCESS *p;
- sigset_t set, oset;
-
- if (block)
- BLOCK_CHILD (set, oset);
-
- p = jobs[job]->pipe;
- while (p && p->next != jobs[job]->pipe)
- p = p->next;
-
- if (block)
- UNBLOCK_CHILD (oset);
-
- return (p);
-}
-
-static pid_t
-find_last_pid (job, block)
- int job;
- int block;
-{
- PROCESS *p;
-
- p = find_last_proc (job, block);
- /* Possible race condition here. */
- return p->pid;
-}
-
-/* Wait for a particular child of the shell to finish executing.
- This low-level function prints an error message if PID is not
- a child of this shell. It returns -1 if it fails, or whatever
- wait_for returns otherwise. If the child is not found in the
- jobs table, it returns 127. */
-int
-wait_for_single_pid (pid)
- pid_t pid;
-{
- register PROCESS *child;
- sigset_t set, oset;
- int r, job;
-
- BLOCK_CHILD (set, oset);
- child = find_pipeline (pid, 0, (int *)NULL);
- UNBLOCK_CHILD (oset);
-
- if (child == 0)
- {
- r = bgp_search (pid);
- if (r >= 0)
- return r;
- }
-
- if (child == 0)
- {
- internal_error (_("wait: pid %ld is not a child of this shell"), (long)pid);
- return (127);
- }
-
- r = wait_for (pid);
-
- /* POSIX.2: if we just waited for a job, we can remove it from the jobs
- table. */
- BLOCK_CHILD (set, oset);
- job = find_job (pid, 0, NULL);
- if (job != NO_JOB && jobs[job] && DEADJOB (job))
- jobs[job]->flags |= J_NOTIFIED;
- UNBLOCK_CHILD (oset);
-
- /* If running in posix mode, remove the job from the jobs table immediately */
- if (posixly_correct)
- {
- cleanup_dead_jobs ();
- bgp_delete (pid);
- }
-
- return r;
-}
-
-/* Wait for all of the background processes started by this shell to finish. */
-void
-wait_for_background_pids ()
-{
- register int i, r, waited_for;
- sigset_t set, oset;
- pid_t pid;
-
- for (waited_for = 0;;)
- {
- BLOCK_CHILD (set, oset);
-
- /* find first running job; if none running in foreground, break */
- /* XXX could use js.j_firstj and js.j_lastj here */
- for (i = 0; i < js.j_jobslots; i++)
- {
-#if defined (DEBUG)
- if (i < js.j_firstj && jobs[i])
- itrace("wait_for_background_pids: job %d non-null before js.j_firstj (%d)", i, js.j_firstj);
- if (i > js.j_lastj && jobs[i])
- itrace("wait_for_background_pids: job %d non-null after js.j_lastj (%d)", i, js.j_lastj);
-#endif
- if (jobs[i] && RUNNING (i) && IS_FOREGROUND (i) == 0)
- break;
- }
- if (i == js.j_jobslots)
- {
- UNBLOCK_CHILD (oset);
- break;
- }
-
- /* now wait for the last pid in that job. */
- pid = find_last_pid (i, 0);
- UNBLOCK_CHILD (oset);
- QUIT;
- errno = 0; /* XXX */
- r = wait_for_single_pid (pid);
- if (r == -1)
- {
- /* If we're mistaken about job state, compensate. */
- if (errno == ECHILD)
- mark_all_jobs_as_dead ();
- }
- else
- waited_for++;
- }
-
- /* POSIX.2 says the shell can discard the statuses of all completed jobs if
- `wait' is called with no arguments. */
- mark_dead_jobs_as_notified (1);
- cleanup_dead_jobs ();
- bgp_clear ();
-}
-
-/* Make OLD_SIGINT_HANDLER the SIGINT signal handler. */
-#define INVALID_SIGNAL_HANDLER (SigHandler *)wait_for_background_pids
-static SigHandler *old_sigint_handler = INVALID_SIGNAL_HANDLER;
-
-static int wait_sigint_received;
-static int child_caught_sigint;
-static int waiting_for_child;
-
-static void
-restore_sigint_handler ()
-{
- if (old_sigint_handler != INVALID_SIGNAL_HANDLER)
- {
- set_signal_handler (SIGINT, old_sigint_handler);
- old_sigint_handler = INVALID_SIGNAL_HANDLER;
- waiting_for_child = 0;
- }
-}
-
-/* Handle SIGINT while we are waiting for children in a script to exit.
- The `wait' builtin should be interruptible, but all others should be
- effectively ignored (i.e. not cause the shell to exit). */
-static sighandler
-wait_sigint_handler (sig)
- int sig;
-{
- SigHandler *sigint_handler;
-
- if (interrupt_immediately ||
- (this_shell_builtin && this_shell_builtin == wait_builtin))
- {
- last_command_exit_value = EXECUTION_FAILURE;
- restore_sigint_handler ();
- /* If we got a SIGINT while in `wait', and SIGINT is trapped, do
- what POSIX.2 says (see builtins/wait.def for more info). */
- if (this_shell_builtin && this_shell_builtin == wait_builtin &&
- signal_is_trapped (SIGINT) &&
- ((sigint_handler = trap_to_sighandler (SIGINT)) == trap_handler))
- {
- interrupt_immediately = 0;
- trap_handler (SIGINT); /* set pending_traps[SIGINT] */
- wait_signal_received = SIGINT;
- longjmp (wait_intr_buf, 1);
- }
-
- ADDINTERRUPT;
- QUIT;
- }
-
- /* XXX - should this be interrupt_state? If it is, the shell will act
- as if it got the SIGINT interrupt. */
- if (waiting_for_child)
- wait_sigint_received = 1;
- else
- {
- last_command_exit_value = 128+SIGINT;
- restore_sigint_handler ();
- kill (getpid (), SIGINT);
- }
-
- /* Otherwise effectively ignore the SIGINT and allow the running job to
- be killed. */
- SIGRETURN (0);
-}
-
-static int
-process_exit_signal (status)
- WAIT status;
-{
- return (WIFSIGNALED (status) ? WTERMSIG (status) : 0);
-}
-
-static int
-process_exit_status (status)
- WAIT status;
-{
- if (WIFSIGNALED (status))
- return (128 + WTERMSIG (status));
- else if (WIFSTOPPED (status) == 0)
- return (WEXITSTATUS (status));
- else
- return (EXECUTION_SUCCESS);
-}
-
-static WAIT
-job_signal_status (job)
- int job;
-{
- register PROCESS *p;
- WAIT s;
-
- p = jobs[job]->pipe;
- do
- {
- s = p->status;
- if (WIFSIGNALED(s) || WIFSTOPPED(s))
- break;
- p = p->next;
- }
- while (p != jobs[job]->pipe);
-
- return s;
-}
-
-/* Return the exit status of the last process in the pipeline for job JOB.
- This is the exit status of the entire job. */
-static WAIT
-raw_job_exit_status (job)
- int job;
-{
- register PROCESS *p;
- int fail;
- WAIT ret;
-
- if (pipefail_opt)
- {
- fail = 0;
- p = jobs[job]->pipe;
- do
- {
- if (WSTATUS (p->status) != EXECUTION_SUCCESS)
- fail = WSTATUS(p->status);
- p = p->next;
- }
- while (p != jobs[job]->pipe);
- WSTATUS (ret) = fail;
- return ret;
- }
-
- for (p = jobs[job]->pipe; p->next != jobs[job]->pipe; p = p->next)
- ;
- return (p->status);
-}
-
-/* Return the exit status of job JOB. This is the exit status of the last
- (rightmost) process in the job's pipeline, modified if the job was killed
- by a signal or stopped. */
-int
-job_exit_status (job)
- int job;
-{
- return (process_exit_status (raw_job_exit_status (job)));
-}
-
-int
-job_exit_signal (job)
- int job;
-{
- return (process_exit_signal (raw_job_exit_status (job)));
-}
-
-#define FIND_CHILD(pid, child) \
- do \
- { \
- child = find_pipeline (pid, 0, (int *)NULL); \
- if (child == 0) \
- { \
- give_terminal_to (shell_pgrp, 0); \
- UNBLOCK_CHILD (oset); \
- internal_error (_("wait_for: No record of process %ld"), (long)pid); \
- restore_sigint_handler (); \
- return (termination_state = 127); \
- } \
- } \
- while (0)
-
-/* Wait for pid (one of our children) to terminate, then
- return the termination state. Returns 127 if PID is not found in
- the jobs table. Returns -1 if waitchld() returns -1, indicating
- that there are no unwaited-for child processes. */
-int
-wait_for (pid)
- pid_t pid;
-{
- int job, termination_state, r;
- WAIT s;
- register PROCESS *child;
- sigset_t set, oset;
-
- /* In the case that this code is interrupted, and we longjmp () out of it,
- we are relying on the code in throw_to_top_level () to restore the
- top-level signal mask. */
- BLOCK_CHILD (set, oset);
-
- /* Ignore interrupts while waiting for a job run without job control
- to finish. We don't want the shell to exit if an interrupt is
- received, only if one of the jobs run is killed via SIGINT. If
- job control is not set, the job will be run in the same pgrp as
- the shell, and the shell will see any signals the job gets. In
- fact, we want this set every time the waiting shell and the waited-
- for process are in the same process group, including command
- substitution. */
-
- /* This is possibly a race condition -- should it go in stop_pipeline? */
- wait_sigint_received = child_caught_sigint = 0;
- if (job_control == 0 || (subshell_environment&SUBSHELL_COMSUB))
- {
- old_sigint_handler = set_signal_handler (SIGINT, wait_sigint_handler);
- waiting_for_child = 0;
- if (old_sigint_handler == SIG_IGN)
- set_signal_handler (SIGINT, old_sigint_handler);
- }
-
- termination_state = last_command_exit_value;
-
- if (interactive && job_control == 0)
- QUIT;
- /* Check for terminating signals and exit the shell if we receive one */
- CHECK_TERMSIG;
-
- /* If we say wait_for (), then we have a record of this child somewhere.
- If it and none of its peers are running, don't call waitchld(). */
-
- job = NO_JOB;
- do
- {
- FIND_CHILD (pid, child);
-
- /* If this child is part of a job, then we are really waiting for the
- job to finish. Otherwise, we are waiting for the child to finish.
- We check for JDEAD in case the job state has been set by waitchld
- after receipt of a SIGCHLD. */
- if (job == NO_JOB)
- job = find_job (pid, 0, NULL);
-
- /* waitchld() takes care of setting the state of the job. If the job
- has already exited before this is called, sigchld_handler will have
- called waitchld and the state will be set to JDEAD. */
-
- if (PRUNNING(child) || (job != NO_JOB && RUNNING (job)))
- {
-#if defined (WAITPID_BROKEN) /* SCOv4 */
- sigset_t suspend_set;
- sigemptyset (&suspend_set);
- sigsuspend (&suspend_set);
-#else /* !WAITPID_BROKEN */
-# if defined (MUST_UNBLOCK_CHLD)
- struct sigaction act, oact;
- sigset_t nullset, chldset;
-
- sigemptyset (&nullset);
- sigemptyset (&chldset);
- sigprocmask (SIG_SETMASK, &nullset, &chldset);
- act.sa_handler = SIG_DFL;
- sigemptyset (&act.sa_mask);
- sigemptyset (&oact.sa_mask);
- act.sa_flags = 0;
- sigaction (SIGCHLD, &act, &oact);
-# endif
- queue_sigchld = 1;
- waiting_for_child++;
- r = waitchld (pid, 1);
- waiting_for_child--;
-# if defined (MUST_UNBLOCK_CHLD)
- sigaction (SIGCHLD, &oact, (struct sigaction *)NULL);
- sigprocmask (SIG_SETMASK, &chldset, (sigset_t *)NULL);
-# endif
- queue_sigchld = 0;
- if (r == -1 && errno == ECHILD && this_shell_builtin == wait_builtin)
- {
- termination_state = -1;
- goto wait_for_return;
- }
-
- /* If child is marked as running, but waitpid() returns -1/ECHILD,
- there is something wrong. Somewhere, wait should have returned
- that child's pid. Mark the child as not running and the job,
- if it exists, as JDEAD. */
- if (r == -1 && errno == ECHILD)
- {
- child->running = PS_DONE;
- WSTATUS (child->status) = 0; /* XXX -- can't find true status */
- js.c_living = 0; /* no living child processes */
- if (job != NO_JOB)
- {
- jobs[job]->state = JDEAD;
- js.c_reaped++;
- js.j_ndead++;
- }
- }
-#endif /* WAITPID_BROKEN */
- }
-
- /* If the shell is interactive, and job control is disabled, see
- if the foreground process has died due to SIGINT and jump out
- of the wait loop if it has. waitchld has already restored the
- old SIGINT signal handler. */
- if (interactive && job_control == 0)
- QUIT;
- /* Check for terminating signals and exit the shell if we receive one */
- CHECK_TERMSIG;
- }
- while (PRUNNING (child) || (job != NO_JOB && RUNNING (job)));
-
- /* Restore the original SIGINT signal handler before we return. */
- restore_sigint_handler ();
-
- /* The exit state of the command is either the termination state of the
- child, or the termination state of the job. If a job, the status
- of the last child in the pipeline is the significant one. If the command
- or job was terminated by a signal, note that value also. */
- termination_state = (job != NO_JOB) ? job_exit_status (job)
- : process_exit_status (child->status);
- last_command_exit_signal = (job != NO_JOB) ? job_exit_signal (job)
- : process_exit_signal (child->status);
-
- /* XXX */
- if ((job != NO_JOB && JOBSTATE (job) == JSTOPPED) || WIFSTOPPED (child->status))
- termination_state = 128 + WSTOPSIG (child->status);
-
- if (job == NO_JOB || IS_JOBCONTROL (job))
- {
- /* XXX - under what circumstances is a job not present in the jobs
- table (job == NO_JOB)?
- 1. command substitution
-
- In the case of command substitution, at least, it's probably not
- the right thing to give the terminal to the shell's process group,
- even though there is code in subst.c:command_substitute to work
- around it.
-
- Things that don't:
- $PROMPT_COMMAND execution
- process substitution
- */
-#if 0
-if (job == NO_JOB)
- itrace("wait_for: job == NO_JOB, giving the terminal to shell_pgrp (%ld)", (long)shell_pgrp);
-#endif
- give_terminal_to (shell_pgrp, 0);
- }
-
- /* If the command did not exit cleanly, or the job is just
- being stopped, then reset the tty state back to what it
- was before this command. Reset the tty state and notify
- the user of the job termination only if the shell is
- interactive. Clean up any dead jobs in either case. */
- if (job != NO_JOB)
- {
- if (interactive_shell && subshell_environment == 0)
- {
- /* This used to use `child->status'. That's wrong, however, for
- pipelines. `child' is the first process in the pipeline. It's
- likely that the process we want to check for abnormal termination
- or stopping is the last process in the pipeline, especially if
- it's long-lived and the first process is short-lived. Since we
- know we have a job here, we can check all the processes in this
- job's pipeline and see if one of them stopped or terminated due
- to a signal. We might want to change this later to just check
- the last process in the pipeline. If no process exits due to a
- signal, S is left as the status of the last job in the pipeline. */
- s = job_signal_status (job);
-
- if (WIFSIGNALED (s) || WIFSTOPPED (s))
- {
- set_tty_state ();
-
- /* If the current job was stopped or killed by a signal, and
- the user has requested it, get a possibly new window size */
- if (check_window_size && (job == js.j_current || IS_FOREGROUND (job)))
- get_new_window_size (0, (int *)0, (int *)0);
- }
- else
- get_tty_state ();
-
- /* If job control is enabled, the job was started with job
- control, the job was the foreground job, and it was killed
- by SIGINT, then print a newline to compensate for the kernel
- printing the ^C without a trailing newline. */
- if (job_control && IS_JOBCONTROL (job) && IS_FOREGROUND (job) &&
- WIFSIGNALED (s) && WTERMSIG (s) == SIGINT)
- {
- /* If SIGINT is not trapped and the shell is in a for, while,
- or until loop, act as if the shell received SIGINT as
- well, so the loop can be broken. This doesn't call the
- SIGINT signal handler; maybe it should. */
- if (signal_is_trapped (SIGINT) == 0 && (loop_level || (shell_compatibility_level > 32 && executing_list)))
- ADDINTERRUPT;
- else
- {
- putchar ('\n');
- fflush (stdout);
- }
- }
- }
- else if ((subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PIPE)) && wait_sigint_received)
- {
- /* If waiting for a job in a subshell started to do command
- substitution or to run a pipeline element that consists of
- something like a while loop or a for loop, simulate getting
- and being killed by the SIGINT to pass the status back to our
- parent. */
- s = job_signal_status (job);
-
- if (child_caught_sigint == 0 && signal_is_trapped (SIGINT) == 0)
- {
- UNBLOCK_CHILD (oset);
- old_sigint_handler = set_signal_handler (SIGINT, SIG_DFL);
- if (old_sigint_handler == SIG_IGN)
- restore_sigint_handler ();
- else
- kill (getpid (), SIGINT);
- }
- }
- else if (interactive_shell == 0 && IS_FOREGROUND (job) && check_window_size)
- get_new_window_size (0, (int *)0, (int *)0);
-
- /* Moved here from set_job_status_and_cleanup, which is in the SIGCHLD
- signal handler path */
- if (DEADJOB (job) && IS_FOREGROUND (job) /*&& subshell_environment == 0*/)
- setjstatus (job);
-
- /* If this job is dead, notify the user of the status. If the shell
- is interactive, this will display a message on the terminal. If
- the shell is not interactive, make sure we turn on the notify bit
- so we don't get an unwanted message about the job's termination,
- and so delete_job really clears the slot in the jobs table. */
- notify_and_cleanup ();
- }
-
-wait_for_return:
-
- UNBLOCK_CHILD (oset);
-
- return (termination_state);
-}
-
-/* Wait for the last process in the pipeline for JOB. Returns whatever
- wait_for returns: the last process's termination state or -1 if there
- are no unwaited-for child processes or an error occurs. */
-int
-wait_for_job (job)
- int job;
-{
- pid_t pid;
- int r;
- sigset_t set, oset;
-
- BLOCK_CHILD(set, oset);
- if (JOBSTATE (job) == JSTOPPED)
- internal_warning (_("wait_for_job: job %d is stopped"), job+1);
-
- pid = find_last_pid (job, 0);
- UNBLOCK_CHILD(oset);
- r = wait_for (pid);
-
- /* POSIX.2: we can remove the job from the jobs table if we just waited
- for it. */
- BLOCK_CHILD (set, oset);
- if (job != NO_JOB && jobs[job] && DEADJOB (job))
- jobs[job]->flags |= J_NOTIFIED;
- UNBLOCK_CHILD (oset);
-
- return r;
-}
-
-/* Print info about dead jobs, and then delete them from the list
- of known jobs. This does not actually delete jobs when the
- shell is not interactive, because the dead jobs are not marked
- as notified. */
-void
-notify_and_cleanup ()
-{
- if (jobs_list_frozen)
- return;
-
- if (interactive || interactive_shell == 0 || sourcelevel)
- notify_of_job_status ();
-
- cleanup_dead_jobs ();
-}
-
-/* Make dead jobs disappear from the jobs array without notification.
- This is used when the shell is not interactive. */
-void
-reap_dead_jobs ()
-{
- mark_dead_jobs_as_notified (0);
- cleanup_dead_jobs ();
-}
-
-/* Return the next closest (chronologically) job to JOB which is in
- STATE. STATE can be JSTOPPED, JRUNNING. NO_JOB is returned if
- there is no next recent job. */
-static int
-most_recent_job_in_state (job, state)
- int job;
- JOB_STATE state;
-{
- register int i, result;
- sigset_t set, oset;
-
- BLOCK_CHILD (set, oset);
-
- for (result = NO_JOB, i = job - 1; i >= 0; i--)
- {
- if (jobs[i] && (JOBSTATE (i) == state))
- {
- result = i;
- break;
- }
- }
-
- UNBLOCK_CHILD (oset);
-
- return (result);
-}
-
-/* Return the newest *stopped* job older than JOB, or NO_JOB if not
- found. */
-static int
-job_last_stopped (job)
- int job;
-{
- return (most_recent_job_in_state (job, JSTOPPED));
-}
-
-/* Return the newest *running* job older than JOB, or NO_JOB if not
- found. */
-static int
-job_last_running (job)
- int job;
-{
- return (most_recent_job_in_state (job, JRUNNING));
-}
-
-/* Make JOB be the current job, and make previous be useful. Must be
- called with SIGCHLD blocked. */
-static void
-set_current_job (job)
- int job;
-{
- int candidate;
-
- if (js.j_current != job)
- {
- js.j_previous = js.j_current;
- js.j_current = job;
- }
-
- /* First choice for previous job is the old current job. */
- if (js.j_previous != js.j_current &&
- js.j_previous != NO_JOB &&
- jobs[js.j_previous] &&
- STOPPED (js.j_previous))
- return;
-
- /* Second choice: Newest stopped job that is older than
- the current job. */
- candidate = NO_JOB;
- if (STOPPED (js.j_current))
- {
- candidate = job_last_stopped (js.j_current);
-
- if (candidate != NO_JOB)
- {
- js.j_previous = candidate;
- return;
- }
- }
-
- /* If we get here, there is either only one stopped job, in which case it is
- the current job and the previous job should be set to the newest running
- job, or there are only running jobs and the previous job should be set to
- the newest running job older than the current job. We decide on which
- alternative to use based on whether or not JOBSTATE(js.j_current) is
- JSTOPPED. */
-
- candidate = RUNNING (js.j_current) ? job_last_running (js.j_current)
- : job_last_running (js.j_jobslots);
-
- if (candidate != NO_JOB)
- {
- js.j_previous = candidate;
- return;
- }
-
- /* There is only a single job, and it is both `+' and `-'. */
- js.j_previous = js.j_current;
-}
-
-/* Make current_job be something useful, if it isn't already. */
-
-/* Here's the deal: The newest non-running job should be `+', and the
- next-newest non-running job should be `-'. If there is only a single
- stopped job, the js.j_previous is the newest non-running job. If there
- are only running jobs, the newest running job is `+' and the
- next-newest running job is `-'. Must be called with SIGCHLD blocked. */
-
-static void
-reset_current ()
-{
- int candidate;
-
- if (js.j_jobslots && js.j_current != NO_JOB && jobs[js.j_current] && STOPPED (js.j_current))
- candidate = js.j_current;
- else
- {
- candidate = NO_JOB;
-
- /* First choice: the previous job. */
- if (js.j_previous != NO_JOB && jobs[js.j_previous] && STOPPED (js.j_previous))
- candidate = js.j_previous;
-
- /* Second choice: the most recently stopped job. */
- if (candidate == NO_JOB)
- candidate = job_last_stopped (js.j_jobslots);
-
- /* Third choice: the newest running job. */
- if (candidate == NO_JOB)
- candidate = job_last_running (js.j_jobslots);
- }
-
- /* If we found a job to use, then use it. Otherwise, there
- are no jobs period. */
- if (candidate != NO_JOB)
- set_current_job (candidate);
- else
- js.j_current = js.j_previous = NO_JOB;
-}
-
-/* Set up the job structures so we know the job and its processes are
- all running. */
-static void
-set_job_running (job)
- int job;
-{
- register PROCESS *p;
-
- /* Each member of the pipeline is now running. */
- p = jobs[job]->pipe;
-
- do
- {
- if (WIFSTOPPED (p->status))
- p->running = PS_RUNNING; /* XXX - could be PS_STOPPED */
- p = p->next;
- }
- while (p != jobs[job]->pipe);
-
- /* This means that the job is running. */
- JOBSTATE (job) = JRUNNING;
-}
-
-/* Start a job. FOREGROUND if non-zero says to do that. Otherwise,
- start the job in the background. JOB is a zero-based index into
- JOBS. Returns -1 if it is unable to start a job, and the return
- status of the job otherwise. */
-int
-start_job (job, foreground)
- int job, foreground;
-{
- register PROCESS *p;
- int already_running;
- sigset_t set, oset;
- char *wd, *s;
- static TTYSTRUCT save_stty;
-
- BLOCK_CHILD (set, oset);
-
- if (DEADJOB (job))
- {
- internal_error (_("%s: job has terminated"), this_command_name);
- UNBLOCK_CHILD (oset);
- return (-1);
- }
-
- already_running = RUNNING (job);
-
- if (foreground == 0 && already_running)
- {
- internal_error (_("%s: job %d already in background"), this_command_name, job + 1);
- UNBLOCK_CHILD (oset);
- return (0); /* XPG6/SUSv3 says this is not an error */
- }
-
- wd = current_working_directory ();
-
- /* You don't know about the state of this job. Do you? */
- jobs[job]->flags &= ~J_NOTIFIED;
-
- if (foreground)
- {
- set_current_job (job);
- jobs[job]->flags |= J_FOREGROUND;
- }
-
- /* Tell the outside world what we're doing. */
- p = jobs[job]->pipe;
-
- if (foreground == 0)
- {
- /* POSIX.2 says `bg' doesn't give any indication about current or
- previous job. */
- if (posixly_correct == 0)
- s = (job == js.j_current) ? "+ ": ((job == js.j_previous) ? "- " : " ");
- else
- s = " ";
- printf ("[%d]%s", job + 1, s);
- }
-
- do
- {
- printf ("%s%s",
- p->command ? p->command : "",
- p->next != jobs[job]->pipe? " | " : "");
- p = p->next;
- }
- while (p != jobs[job]->pipe);
-
- if (foreground == 0)
- printf (" &");
-
- if (strcmp (wd, jobs[job]->wd) != 0)
- printf (" (wd: %s)", polite_directory_format (jobs[job]->wd));
-
- printf ("\n");
-
- /* Run the job. */
- if (already_running == 0)
- set_job_running (job);
-
- /* Save the tty settings before we start the job in the foreground. */
- if (foreground)
- {
- get_tty_state ();
- save_stty = shell_tty_info;
- /* Give the terminal to this job. */
- if (IS_JOBCONTROL (job))
- give_terminal_to (jobs[job]->pgrp, 0);
- }
- else
- jobs[job]->flags &= ~J_FOREGROUND;
-
- /* If the job is already running, then don't bother jump-starting it. */
- if (already_running == 0)
- {
- jobs[job]->flags |= J_NOTIFIED;
- killpg (jobs[job]->pgrp, SIGCONT);
- }
-
- if (foreground)
- {
- pid_t pid;
- int st;
-
- pid = find_last_pid (job, 0);
- UNBLOCK_CHILD (oset);
- st = wait_for (pid);
- shell_tty_info = save_stty;
- set_tty_state ();
- return (st);
- }
- else
- {
- reset_current ();
- UNBLOCK_CHILD (oset);
- return (0);
- }
-}
-
-/* Give PID SIGNAL. This determines what job the pid belongs to (if any).
- If PID does belong to a job, and the job is stopped, then CONTinue the
- job after giving it SIGNAL. Returns -1 on failure. If GROUP is non-null,
- then kill the process group associated with PID. */
-int
-kill_pid (pid, sig, group)
- pid_t pid;
- int sig, group;
-{
- register PROCESS *p;
- int job, result, negative;
- sigset_t set, oset;
-
- if (pid < -1)
- {
- pid = -pid;
- group = negative = 1;
- }
- else
- negative = 0;
-
- result = EXECUTION_SUCCESS;
- if (group)
- {
- BLOCK_CHILD (set, oset);
- p = find_pipeline (pid, 0, &job);
-
- if (job != NO_JOB)
- {
- jobs[job]->flags &= ~J_NOTIFIED;
-
- /* Kill process in backquotes or one started without job control? */
-
- /* If we're passed a pid < -1, just call killpg and see what happens */
- if (negative && jobs[job]->pgrp == shell_pgrp)
- result = killpg (pid, sig);
- /* If we're killing using job control notification, for example,
- without job control active, we have to do things ourselves. */
- else if (jobs[job]->pgrp == shell_pgrp)
- {
- p = jobs[job]->pipe;
- do
- {
- if (PALIVE (p) == 0)
- continue; /* avoid pid recycling problem */
- kill (p->pid, sig);
- if (PEXITED (p) && (sig == SIGTERM || sig == SIGHUP))
- kill (p->pid, SIGCONT);
- p = p->next;
- }
- while (p != jobs[job]->pipe);
- }
- else
- {
- result = killpg (jobs[job]->pgrp, sig);
- if (p && STOPPED (job) && (sig == SIGTERM || sig == SIGHUP))
- killpg (jobs[job]->pgrp, SIGCONT);
- /* If we're continuing a stopped job via kill rather than bg or
- fg, emulate the `bg' behavior. */
- if (p && STOPPED (job) && (sig == SIGCONT))
- {
- set_job_running (job);
- jobs[job]->flags &= ~J_FOREGROUND;
- jobs[job]->flags |= J_NOTIFIED;
- }
- }
- }
- else
- result = killpg (pid, sig);
-
- UNBLOCK_CHILD (oset);
- }
- else
- result = kill (pid, sig);
-
- return (result);
-}
-
-/* sigchld_handler () flushes at least one of the children that we are
- waiting for. It gets run when we have gotten a SIGCHLD signal. */
-static sighandler
-sigchld_handler (sig)
- int sig;
-{
- int n, oerrno;
-
- oerrno = errno;
- REINSTALL_SIGCHLD_HANDLER;
- sigchld++;
- n = 0;
- if (queue_sigchld == 0)
- n = waitchld (-1, 0);
- errno = oerrno;
- SIGRETURN (n);
-}
-
-/* waitchld() reaps dead or stopped children. It's called by wait_for and
- sigchld_handler, and runs until there aren't any children terminating any
- more.
- If BLOCK is 1, this is to be a blocking wait for a single child, although
- an arriving SIGCHLD could cause the wait to be non-blocking. It returns
- the number of children reaped, or -1 if there are no unwaited-for child
- processes. */
-static int
-waitchld (wpid, block)
- pid_t wpid;
- int block;
-{
- WAIT status;
- PROCESS *child;
- pid_t pid;
- int call_set_current, last_stopped_job, job, children_exited, waitpid_flags;
- static int wcontinued = WCONTINUED; /* run-time fix for glibc problem */
-
- call_set_current = children_exited = 0;
- last_stopped_job = NO_JOB;
-
- do
- {
- /* We don't want to be notified about jobs stopping if job control
- is not active. XXX - was interactive_shell instead of job_control */
- waitpid_flags = (job_control && subshell_environment == 0)
- ? (WUNTRACED|wcontinued)
- : 0;
- if (sigchld || block == 0)
- waitpid_flags |= WNOHANG;
- /* Check for terminating signals and exit the shell if we receive one */
- CHECK_TERMSIG;
-
- if (block == 1 && queue_sigchld == 0 && (waitpid_flags & WNOHANG) == 0)
- {
- internal_warning (_("waitchld: turning on WNOHANG to avoid indefinite block"));
- waitpid_flags |= WNOHANG;
- }
-
- pid = WAITPID (-1, &status, waitpid_flags);
-
- /* WCONTINUED may be rejected by waitpid as invalid even when defined */
- if (wcontinued && pid < 0 && errno == EINVAL)
- {
- wcontinued = 0;
- continue; /* jump back to the test and retry without WCONTINUED */
- }
-
- /* The check for WNOHANG is to make sure we decrement sigchld only
- if it was non-zero before we called waitpid. */
- if (sigchld > 0 && (waitpid_flags & WNOHANG))
- sigchld--;
-
- /* If waitpid returns -1 with errno == ECHILD, there are no more
- unwaited-for child processes of this shell. */
- if (pid < 0 && errno == ECHILD)
- {
- if (children_exited == 0)
- return -1;
- else
- break;
- }
-
- /* If waitpid returns 0, there are running children. If it returns -1,
- the only other error POSIX says it can return is EINTR. */
- CHECK_TERMSIG;
-
- /* If waitpid returns -1/EINTR and the shell saw a SIGINT, then we
- assume the child has blocked or handled SIGINT. In that case, we
- require the child to actually die due to SIGINT to act on the
- SIGINT we received; otherwise we assume the child handled it and
- let it go. */
- if (pid < 0 && errno == EINTR && wait_sigint_received)
- child_caught_sigint = 1;
-
- if (pid <= 0)
- continue; /* jumps right to the test */
-
- /* If the child process did die due to SIGINT, forget our assumption
- that it caught or otherwise handled it. */
- if (WIFSIGNALED (status) && WTERMSIG (status) == SIGINT)
- child_caught_sigint = 0;
-
- /* children_exited is used to run traps on SIGCHLD. We don't want to
- run the trap if a process is just being continued. */
- if (WIFCONTINUED(status) == 0)
- {
- children_exited++;
- js.c_living--;
- }
-
- /* Locate our PROCESS for this pid. */
- child = find_process (pid, 1, &job); /* want living procs only */
-
-#if defined (COPROCESS_SUPPORT)
- coproc_pidchk (pid, status);
-#endif
-
- /* It is not an error to have a child terminate that we did
- not have a record of. This child could have been part of
- a pipeline in backquote substitution. Even so, I'm not
- sure child is ever non-zero. */
- if (child == 0)
- {
- if (WIFEXITED (status) || WIFSIGNALED (status))
- js.c_reaped++;
- continue;
- }
-
- /* Remember status, and whether or not the process is running. */
- child->status = status;
- child->running = WIFCONTINUED(status) ? PS_RUNNING : PS_DONE;
-
- if (PEXITED (child))
- {
- js.c_totreaped++;
- if (job != NO_JOB)
- js.c_reaped++;
- }
-
- if (job == NO_JOB)
- continue;
-
- call_set_current += set_job_status_and_cleanup (job);
-
- if (STOPPED (job))
- last_stopped_job = job;
- else if (DEADJOB (job) && last_stopped_job == job)
- last_stopped_job = NO_JOB;
- }
- while ((sigchld || block == 0) && pid > (pid_t)0);
-
- /* If a job was running and became stopped, then set the current
- job. Otherwise, don't change a thing. */
- if (call_set_current)
- {
- if (last_stopped_job != NO_JOB)
- set_current_job (last_stopped_job);
- else
- reset_current ();
- }
-
- /* Call a SIGCHLD trap handler for each child that exits, if one is set. */
- if (job_control && signal_is_trapped (SIGCHLD) && children_exited &&
- trap_list[SIGCHLD] != (char *)IGNORE_SIG)
- {
- if (posixly_correct && this_shell_builtin && this_shell_builtin == wait_builtin)
- {
- interrupt_immediately = 0;
- trap_handler (SIGCHLD); /* set pending_traps[SIGCHLD] */
- wait_signal_received = SIGCHLD;
- longjmp (wait_intr_buf, 1);
- }
-
- run_sigchld_trap (children_exited);
- }
-
- /* We have successfully recorded the useful information about this process
- that has just changed state. If we notify asynchronously, and the job
- that this process belongs to is no longer running, then notify the user
- of that fact now. */
- if (asynchronous_notification && interactive)
- notify_of_job_status ();
-
- return (children_exited);
-}
-
-/* Set the status of JOB and perform any necessary cleanup if the job is
- marked as JDEAD.
-
- Currently, the cleanup activity is restricted to handling any SIGINT
- received while waiting for a foreground job to finish. */
-static int
-set_job_status_and_cleanup (job)
- int job;
-{
- PROCESS *child;
- int tstatus, job_state, any_stopped, any_tstped, call_set_current;
- SigHandler *temp_handler;
-
- child = jobs[job]->pipe;
- jobs[job]->flags &= ~J_NOTIFIED;
-
- call_set_current = 0;
-
- /*
- * COMPUTE JOB STATUS
- */
-
- /* If all children are not running, but any of them is stopped, then
- the job is stopped, not dead. */
- job_state = any_stopped = any_tstped = 0;
- do
- {
- job_state |= PRUNNING (child);
-#if 0
- if (PEXITED (child) && (WIFSTOPPED (child->status)))
-#else
- /* Only checking for WIFSTOPPED now, not for PS_DONE */
- if (PSTOPPED (child))
-#endif
- {
- any_stopped = 1;
- any_tstped |= interactive && job_control &&
- (WSTOPSIG (child->status) == SIGTSTP);
- }
- child = child->next;
- }
- while (child != jobs[job]->pipe);
-
- /* If job_state != 0, the job is still running, so don't bother with
- setting the process exit status and job state unless we're
- transitioning from stopped to running. */
- if (job_state != 0 && JOBSTATE(job) != JSTOPPED)
- return 0;
-
- /*
- * SET JOB STATUS
- */
-
- /* The job is either stopped or dead. Set the state of the job accordingly. */
- if (any_stopped)
- {
- jobs[job]->state = JSTOPPED;
- jobs[job]->flags &= ~J_FOREGROUND;
- call_set_current++;
- /* Suspending a job with SIGTSTP breaks all active loops. */
- if (any_tstped && loop_level)
- breaking = loop_level;
- }
- else if (job_state != 0) /* was stopped, now running */
- {
- jobs[job]->state = JRUNNING;
- call_set_current++;
- }
- else
- {
- jobs[job]->state = JDEAD;
- js.j_ndead++;
-
-#if 0
- if (IS_FOREGROUND (job))
- setjstatus (job);
-#endif
-
- /* If this job has a cleanup function associated with it, call it
- with `cleanarg' as the single argument, then set the function
- pointer to NULL so it is not inadvertently called twice. The
- cleanup function is responsible for deallocating cleanarg. */
- if (jobs[job]->j_cleanup)
- {
- (*jobs[job]->j_cleanup) (jobs[job]->cleanarg);
- jobs[job]->j_cleanup = (sh_vptrfunc_t *)NULL;
- }
- }
-
- /*
- * CLEANUP
- *
- * Currently, we just do special things if we got a SIGINT while waiting
- * for a foreground job to complete
- */
-
- if (JOBSTATE (job) == JDEAD)
- {
- /* If we're running a shell script and we get a SIGINT with a
- SIGINT trap handler, but the foreground job handles it and
- does not exit due to SIGINT, run the trap handler but do not
- otherwise act as if we got the interrupt. */
- if (wait_sigint_received && interactive_shell == 0 &&
- child_caught_sigint && IS_FOREGROUND (job) &&
- signal_is_trapped (SIGINT))
- {
- int old_frozen;
- wait_sigint_received = 0;
- last_command_exit_value = process_exit_status (child->status);
-
- old_frozen = jobs_list_frozen;
- jobs_list_frozen = 1;
- tstatus = maybe_call_trap_handler (SIGINT);
- jobs_list_frozen = old_frozen;
- }
-
- /* If the foreground job is killed by SIGINT when job control is not
- active, we need to perform some special handling.
-
- The check of wait_sigint_received is a way to determine if the
- SIGINT came from the keyboard (in which case the shell has already
- seen it, and wait_sigint_received is non-zero, because keyboard
- signals are sent to process groups) or via kill(2) to the foreground
- process by another process (or itself). If the shell did receive the
- SIGINT, it needs to perform normal SIGINT processing. */
- else if (wait_sigint_received &&
- child_caught_sigint == 0 &&
- IS_FOREGROUND (job) && IS_JOBCONTROL (job) == 0)
- {
- int old_frozen;
-
- wait_sigint_received = 0;
-
- /* If SIGINT is trapped, set the exit status so that the trap
- handler can see it. */
- if (signal_is_trapped (SIGINT))
- last_command_exit_value = process_exit_status (child->status);
-
- /* If the signal is trapped, let the trap handler get it no matter
- what and simply return if the trap handler returns.
- maybe_call_trap_handler() may cause dead jobs to be removed from
- the job table because of a call to execute_command. We work
- around this by setting JOBS_LIST_FROZEN. */
- old_frozen = jobs_list_frozen;
- jobs_list_frozen = 1;
- tstatus = maybe_call_trap_handler (SIGINT);
- jobs_list_frozen = old_frozen;
- if (tstatus == 0 && old_sigint_handler != INVALID_SIGNAL_HANDLER)
- {
- /* wait_sigint_handler () has already seen SIGINT and
- allowed the wait builtin to jump out. We need to
- call the original SIGINT handler, if necessary. If
- the original handler is SIG_DFL, we need to resend
- the signal to ourselves. */
-
- temp_handler = old_sigint_handler;
-
- /* Bogus. If we've reset the signal handler as the result
- of a trap caught on SIGINT, then old_sigint_handler
- will point to trap_handler, which now knows nothing about
- SIGINT (if we reset the sighandler to the default).
- In this case, we have to fix things up. What a crock. */
- if (temp_handler == trap_handler && signal_is_trapped (SIGINT) == 0)
- temp_handler = trap_to_sighandler (SIGINT);
- restore_sigint_handler ();
- if (temp_handler == SIG_DFL)
- termsig_handler (SIGINT); /* XXX */
- else if (temp_handler != SIG_IGN)
- (*temp_handler) (SIGINT);
- }
- }
- }
-
- return call_set_current;
-}
-
-/* Build the array of values for the $PIPESTATUS variable from the set of
- exit statuses of all processes in the job J. */
-static void
-setjstatus (j)
- int j;
-{
-#if defined (ARRAY_VARS)
- register int i;
- register PROCESS *p;
-
- for (i = 1, p = jobs[j]->pipe; p->next != jobs[j]->pipe; p = p->next, i++)
- ;
- i++;
- if (statsize < i)
- {
- pstatuses = (int *)xrealloc (pstatuses, i * sizeof (int));
- statsize = i;
- }
- i = 0;
- p = jobs[j]->pipe;
- do
- {
- pstatuses[i++] = process_exit_status (p->status);
- p = p->next;
- }
- while (p != jobs[j]->pipe);
-
- pstatuses[i] = -1; /* sentinel */
- set_pipestatus_array (pstatuses, i);
-#endif
-}
-
-void
-run_sigchld_trap (nchild)
- int nchild;
-{
- char *trap_command;
- int i;
-
- /* Turn off the trap list during the call to parse_and_execute ()
- to avoid potentially infinite recursive calls. Preserve the
- values of last_command_exit_value, last_made_pid, and the_pipeline
- around the execution of the trap commands. */
- trap_command = savestring (trap_list[SIGCHLD]);
-
- begin_unwind_frame ("SIGCHLD trap");
- unwind_protect_int (last_command_exit_value);
- unwind_protect_int (last_command_exit_signal);
- unwind_protect_var (last_made_pid);
- unwind_protect_int (interrupt_immediately);
- unwind_protect_int (jobs_list_frozen);
- unwind_protect_pointer (the_pipeline);
- unwind_protect_pointer (subst_assign_varlist);
-
- /* We have to add the commands this way because they will be run
- in reverse order of adding. We don't want maybe_set_sigchld_trap ()
- to reference freed memory. */
- add_unwind_protect (xfree, trap_command);
- add_unwind_protect (maybe_set_sigchld_trap, trap_command);
-
- subst_assign_varlist = (WORD_LIST *)NULL;
- the_pipeline = (PROCESS *)NULL;
-
- set_impossible_sigchld_trap ();
- jobs_list_frozen = 1;
- for (i = 0; i < nchild; i++)
- {
- interrupt_immediately = 1;
- parse_and_execute (savestring (trap_command), "trap", SEVAL_NOHIST|SEVAL_RESETLINE);
- }
-
- run_unwind_frame ("SIGCHLD trap");
-}
-
-/* Function to call when you want to notify people of changes
- in job status. This prints out all jobs which are pending
- notification to stderr, and marks those printed as already
- notified, thus making them candidates for cleanup. */
-static void
-notify_of_job_status ()
-{
- register int job, termsig;
- char *dir;
- sigset_t set, oset;
- WAIT s;
-
- if (jobs == 0 || js.j_jobslots == 0)
- return;
-
- if (old_ttou != 0)
- {
- sigemptyset (&set);
- sigaddset (&set, SIGCHLD);
- sigaddset (&set, SIGTTOU);
- sigemptyset (&oset);
- sigprocmask (SIG_BLOCK, &set, &oset);
- }
- else
- queue_sigchld++;
-
- /* XXX could use js.j_firstj here */
- for (job = 0, dir = (char *)NULL; job < js.j_jobslots; job++)
- {
- if (jobs[job] && IS_NOTIFIED (job) == 0)
- {
- s = raw_job_exit_status (job);
- termsig = WTERMSIG (s);
-
- /* POSIX.2 says we have to hang onto the statuses of at most the
- last CHILD_MAX background processes if the shell is running a
- script. If the shell is running a script, either from a file
- or standard input, don't print anything unless the job was
- killed by a signal. */
- if (startup_state == 0 && WIFSIGNALED (s) == 0 &&
- ((DEADJOB (job) && IS_FOREGROUND (job) == 0) || STOPPED (job)))
- continue;
-
-#if 0
- /* If job control is disabled, don't print the status messages.
- Mark dead jobs as notified so that they get cleaned up. If
- startup_state == 2, we were started to run `-c command', so
- don't print anything. */
- if ((job_control == 0 && interactive_shell) || startup_state == 2)
-#else
- /* If job control is disabled, don't print the status messages.
- Mark dead jobs as notified so that they get cleaned up. If
- startup_state == 2 and subshell_environment has the
- SUBSHELL_COMSUB bit turned on, we were started to run a command
- substitution, so don't print anything. */
- if ((job_control == 0 && interactive_shell) ||
- (startup_state == 2 && (subshell_environment & SUBSHELL_COMSUB)))
-#endif
- {
- /* POSIX.2 compatibility: if the shell is not interactive,
- hang onto the job corresponding to the last asynchronous
- pid until the user has been notified of its status or does
- a `wait'. */
- if (DEADJOB (job) && (interactive_shell || (find_last_pid (job, 0) != last_asynchronous_pid)))
- jobs[job]->flags |= J_NOTIFIED;
- continue;
- }
-
- /* Print info on jobs that are running in the background,
- and on foreground jobs that were killed by anything
- except SIGINT (and possibly SIGPIPE). */
- switch (JOBSTATE (job))
- {
- case JDEAD:
- if (interactive_shell == 0 && termsig && WIFSIGNALED (s) &&
- termsig != SIGINT &&
-#if defined (DONT_REPORT_SIGTERM)
- termsig != SIGTERM &&
-#endif
-#if defined (DONT_REPORT_SIGPIPE)
- termsig != SIGPIPE &&
-#endif
- signal_is_trapped (termsig) == 0)
- {
- /* Don't print `0' for a line number. */
- fprintf (stderr, _("%s: line %d: "), get_name_for_error (), (line_number == 0) ? 1 : line_number);
- pretty_print_job (job, JLIST_NONINTERACTIVE, stderr);
- }
- else if (IS_FOREGROUND (job))
- {
-#if !defined (DONT_REPORT_SIGPIPE)
- if (termsig && WIFSIGNALED (s) && termsig != SIGINT)
-#else
- if (termsig && WIFSIGNALED (s) && termsig != SIGINT && termsig != SIGPIPE)
-#endif
- {
- fprintf (stderr, "%s", j_strsignal (termsig));
-
- if (WIFCORED (s))
- fprintf (stderr, _(" (core dumped)"));
-
- fprintf (stderr, "\n");
- }
- }
- else if (job_control) /* XXX job control test added */
- {
- if (dir == 0)
- dir = current_working_directory ();
- pretty_print_job (job, JLIST_STANDARD, stderr);
- if (dir && strcmp (dir, jobs[job]->wd) != 0)
- fprintf (stderr,
- _("(wd now: %s)\n"), polite_directory_format (dir));
- }
-
- jobs[job]->flags |= J_NOTIFIED;
- break;
-
- case JSTOPPED:
- fprintf (stderr, "\n");
- if (dir == 0)
- dir = current_working_directory ();
- pretty_print_job (job, JLIST_STANDARD, stderr);
- if (dir && (strcmp (dir, jobs[job]->wd) != 0))
- fprintf (stderr,
- _("(wd now: %s)\n"), polite_directory_format (dir));
- jobs[job]->flags |= J_NOTIFIED;
- break;
-
- case JRUNNING:
- case JMIXED:
- break;
-
- default:
- programming_error ("notify_of_job_status");
- }
- }
- }
- if (old_ttou != 0)
- sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL);
- else
- queue_sigchld--;
-}
-
-/* Initialize the job control mechanism, and set up the tty stuff. */
-int
-initialize_job_control (force)
- int force;
-{
- pid_t t;
- int t_errno;
-
- t_errno = -1;
- shell_pgrp = getpgid (0);
-
- if (shell_pgrp == -1)
- {
- sys_error (_("initialize_job_control: getpgrp failed"));
- exit (1);
- }
-
- /* We can only have job control if we are interactive. */
- if (interactive == 0)
- {
- job_control = 0;
- original_pgrp = NO_PID;
- shell_tty = fileno (stderr);
- }
- else
- {
- shell_tty = -1;
-
- /* If forced_interactive is set, we skip the normal check that stderr
- is attached to a tty, so we need to check here. If it's not, we
- need to see whether we have a controlling tty by opening /dev/tty,
- since trying to use job control tty pgrp manipulations on a non-tty
- is going to fail. */
- if (forced_interactive && isatty (fileno (stderr)) == 0)
- shell_tty = open ("/dev/tty", O_RDWR|O_NONBLOCK);
-
- /* Get our controlling terminal. If job_control is set, or
- interactive is set, then this is an interactive shell no
- matter where fd 2 is directed. */
- if (shell_tty == -1)
- shell_tty = dup (fileno (stderr)); /* fd 2 */
-
- shell_tty = move_to_high_fd (shell_tty, 1, -1);
-
- /* Compensate for a bug in systems that compiled the BSD
- rlogind with DEBUG defined, like NeXT and Alliant. */
- if (shell_pgrp == 0)
- {
- shell_pgrp = getpid ();
- setpgid (0, shell_pgrp);
- tcsetpgrp (shell_tty, shell_pgrp);
- }
-
- while ((terminal_pgrp = tcgetpgrp (shell_tty)) != -1)
- {
- if (shell_pgrp != terminal_pgrp)
- {
- SigHandler *ottin;
-
- ottin = set_signal_handler(SIGTTIN, SIG_DFL);
- kill (0, SIGTTIN);
- set_signal_handler (SIGTTIN, ottin);
- continue;
- }
- break;
- }
-
- if (terminal_pgrp == -1)
- t_errno = errno;
-
- /* Make sure that we are using the new line discipline. */
- if (set_new_line_discipline (shell_tty) < 0)
- {
- sys_error (_("initialize_job_control: line discipline"));
- job_control = 0;
- }
- else
- {
- original_pgrp = shell_pgrp;
- shell_pgrp = getpid ();
-
- if ((original_pgrp != shell_pgrp) && (setpgid (0, shell_pgrp) < 0))
- {
- sys_error (_("initialize_job_control: setpgid"));
- shell_pgrp = original_pgrp;
- }
-
- job_control = 1;
-
- /* If (and only if) we just set our process group to our pid,
- thereby becoming a process group leader, and the terminal
- is not in the same process group as our (new) process group,
- then set the terminal's process group to our (new) process
- group. If that fails, set our process group back to what it
- was originally (so we can still read from the terminal) and
- turn off job control. */
- if (shell_pgrp != original_pgrp && shell_pgrp != terminal_pgrp)
- {
- if (give_terminal_to (shell_pgrp, 0) < 0)
- {
- t_errno = errno;
- setpgid (0, original_pgrp);
- shell_pgrp = original_pgrp;
- job_control = 0;
- }
- }
-
- if (job_control && ((t = tcgetpgrp (shell_tty)) == -1 || t != shell_pgrp))
- {
- if (t_errno != -1)
- errno = t_errno;
- sys_error (_("cannot set terminal process group (%d)"), t);
- job_control = 0;
- }
- }
- if (job_control == 0)
- internal_error (_("no job control in this shell"));
- }
-
- if (shell_tty != fileno (stderr))
- SET_CLOSE_ON_EXEC (shell_tty);
-
- set_signal_handler (SIGCHLD, sigchld_handler);
-
- change_flag ('m', job_control ? '-' : '+');
-
- if (interactive)
- get_tty_state ();
-
- if (js.c_childmax < 0)
- js.c_childmax = getmaxchild ();
- if (js.c_childmax < 0)
- js.c_childmax = DEFAULT_CHILD_MAX;
-
- return job_control;
-}
-
-#ifdef DEBUG
-void
-debug_print_pgrps ()
-{
- itrace("original_pgrp = %ld shell_pgrp = %ld terminal_pgrp = %ld",
- (long)original_pgrp, (long)shell_pgrp, (long)terminal_pgrp);
- itrace("tcgetpgrp(%d) -> %ld, getpgid(0) -> %ld",
- shell_tty, (long)tcgetpgrp (shell_tty), (long)getpgid(0));
-}
-#endif
-
-/* Set the line discipline to the best this system has to offer.
- Return -1 if this is not possible. */
-static int
-set_new_line_discipline (tty)
- int tty;
-{
-#if defined (NEW_TTY_DRIVER)
- int ldisc;
-
- if (ioctl (tty, TIOCGETD, &ldisc) < 0)
- return (-1);
-
- if (ldisc != NTTYDISC)
- {
- ldisc = NTTYDISC;
-
- if (ioctl (tty, TIOCSETD, &ldisc) < 0)
- return (-1);
- }
- return (0);
-#endif /* NEW_TTY_DRIVER */
-
-#if defined (TERMIO_TTY_DRIVER)
-# if defined (TERMIO_LDISC) && (NTTYDISC)
- if (ioctl (tty, TCGETA, &shell_tty_info) < 0)
- return (-1);
-
- if (shell_tty_info.c_line != NTTYDISC)
- {
- shell_tty_info.c_line = NTTYDISC;
- if (ioctl (tty, TCSETAW, &shell_tty_info) < 0)
- return (-1);
- }
-# endif /* TERMIO_LDISC && NTTYDISC */
- return (0);
-#endif /* TERMIO_TTY_DRIVER */
-
-#if defined (TERMIOS_TTY_DRIVER)
-# if defined (TERMIOS_LDISC) && defined (NTTYDISC)
- if (tcgetattr (tty, &shell_tty_info) < 0)
- return (-1);
-
- if (shell_tty_info.c_line != NTTYDISC)
- {
- shell_tty_info.c_line = NTTYDISC;
- if (tcsetattr (tty, TCSADRAIN, &shell_tty_info) < 0)
- return (-1);
- }
-# endif /* TERMIOS_LDISC && NTTYDISC */
- return (0);
-#endif /* TERMIOS_TTY_DRIVER */
-
-#if !defined (NEW_TTY_DRIVER) && !defined (TERMIO_TTY_DRIVER) && !defined (TERMIOS_TTY_DRIVER)
- return (-1);
-#endif
-}
-
-/* Setup this shell to handle C-C, etc. */
-void
-initialize_job_signals ()
-{
- if (interactive)
- {
- set_signal_handler (SIGINT, sigint_sighandler);
- set_signal_handler (SIGTSTP, SIG_IGN);
- set_signal_handler (SIGTTOU, SIG_IGN);
- set_signal_handler (SIGTTIN, SIG_IGN);
- }
- else if (job_control)
- {
- old_tstp = set_signal_handler (SIGTSTP, sigstop_sighandler);
- old_ttin = set_signal_handler (SIGTTIN, sigstop_sighandler);
- old_ttou = set_signal_handler (SIGTTOU, sigstop_sighandler);
- }
- /* Leave these things alone for non-interactive shells without job
- control. */
-}
-
-/* Here we handle CONT signals. */
-static sighandler
-sigcont_sighandler (sig)
- int sig;
-{
- initialize_job_signals ();
- set_signal_handler (SIGCONT, old_cont);
- kill (getpid (), SIGCONT);
-
- SIGRETURN (0);
-}
-
-/* Here we handle stop signals while we are running not as a login shell. */
-static sighandler
-sigstop_sighandler (sig)
- int sig;
-{
- set_signal_handler (SIGTSTP, old_tstp);
- set_signal_handler (SIGTTOU, old_ttou);
- set_signal_handler (SIGTTIN, old_ttin);
-
- old_cont = set_signal_handler (SIGCONT, sigcont_sighandler);
-
- give_terminal_to (shell_pgrp, 0);
-
- kill (getpid (), sig);
-
- SIGRETURN (0);
-}
-
-/* Give the terminal to PGRP. */
-int
-give_terminal_to (pgrp, force)
- pid_t pgrp;
- int force;
-{
- sigset_t set, oset;
- int r, e;
-
- r = 0;
- if (job_control || force)
- {
- sigemptyset (&set);
- sigaddset (&set, SIGTTOU);
- sigaddset (&set, SIGTTIN);
- sigaddset (&set, SIGTSTP);
- sigaddset (&set, SIGCHLD);
- sigemptyset (&oset);
- sigprocmask (SIG_BLOCK, &set, &oset);
-
- if (tcsetpgrp (shell_tty, pgrp) < 0)
- {
- /* Maybe we should print an error message? */
-#if 0
- sys_error ("tcsetpgrp(%d) failed: pid %ld to pgrp %ld",
- shell_tty, (long)getpid(), (long)pgrp);
-#endif
- r = -1;
- e = errno;
- }
- else
- terminal_pgrp = pgrp;
- sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL);
- }
-
- if (r == -1)
- errno = e;
-
- return r;
-}
-
-/* Give terminal to NPGRP iff it's currently owned by OPGRP. FLAGS are the
- flags to pass to give_terminal_to(). */
-static int
-maybe_give_terminal_to (opgrp, npgrp, flags)
- pid_t opgrp, npgrp;
- int flags;
-{
- int tpgrp;
-
- tpgrp = tcgetpgrp (shell_tty);
- if (tpgrp < 0 && errno == ENOTTY)
- return -1;
- if (tpgrp == npgrp)
- {
- terminal_pgrp = npgrp;
- return 0;
- }
- else if (tpgrp != opgrp)
- {
-#if defined (DEBUG)
- internal_warning ("maybe_give_terminal_to: terminal pgrp == %d shell pgrp = %d new pgrp = %d", tpgrp, opgrp, npgrp);
-#endif
- return -1;
- }
- else
- return (give_terminal_to (npgrp, flags));
-}
-
-/* Clear out any jobs in the job array. This is intended to be used by
- children of the shell, who should not have any job structures as baggage
- when they start executing (forking subshells for parenthesized execution
- and functions with pipes are the two that spring to mind). If RUNNING_ONLY
- is nonzero, only running jobs are removed from the table. */
-void
-delete_all_jobs (running_only)
- int running_only;
-{
- register int i;
- sigset_t set, oset;
-
- BLOCK_CHILD (set, oset);
-
- /* XXX - need to set j_lastj, j_firstj appropriately if running_only != 0. */
- if (js.j_jobslots)
- {
- js.j_current = js.j_previous = NO_JOB;
-
- /* XXX could use js.j_firstj here */
- for (i = 0; i < js.j_jobslots; i++)
- {
-#if defined (DEBUG)
- if (i < js.j_firstj && jobs[i])
- itrace("delete_all_jobs: job %d non-null before js.j_firstj (%d)", i, js.j_firstj);
- if (i > js.j_lastj && jobs[i])
- itrace("delete_all_jobs: job %d non-null after js.j_lastj (%d)", i, js.j_lastj);
-#endif
- if (jobs[i] && (running_only == 0 || (running_only && RUNNING(i))))
- delete_job (i, DEL_WARNSTOPPED);
- }
- if (running_only == 0)
- {
- free ((char *)jobs);
- js.j_jobslots = 0;
- js.j_firstj = js.j_lastj = js.j_njobs = 0;
- }
- }
-
- if (running_only == 0)
- bgp_clear ();
-
- UNBLOCK_CHILD (oset);
-}
-
-/* Mark all jobs in the job array so that they don't get a SIGHUP when the
- shell gets one. If RUNNING_ONLY is nonzero, mark only running jobs. */
-void
-nohup_all_jobs (running_only)
- int running_only;
-{
- register int i;
- sigset_t set, oset;
-
- BLOCK_CHILD (set, oset);
-
- if (js.j_jobslots)
- {
- /* XXX could use js.j_firstj here */
- for (i = 0; i < js.j_jobslots; i++)
- if (jobs[i] && (running_only == 0 || (running_only && RUNNING(i))))
- nohup_job (i);
- }
-
- UNBLOCK_CHILD (oset);
-}
-
-int
-count_all_jobs ()
-{
- int i, n;
- sigset_t set, oset;
-
- /* This really counts all non-dead jobs. */
- BLOCK_CHILD (set, oset);
- /* XXX could use js.j_firstj here */
- for (i = n = 0; i < js.j_jobslots; i++)
- {
-#if defined (DEBUG)
- if (i < js.j_firstj && jobs[i])
- itrace("count_all_jobs: job %d non-null before js.j_firstj (%d)", i, js.j_firstj);
- if (i > js.j_lastj && jobs[i])
- itrace("count_all_jobs: job %d non-null after js.j_lastj (%d)", i, js.j_lastj);
-#endif
- if (jobs[i] && DEADJOB(i) == 0)
- n++;
- }
- UNBLOCK_CHILD (oset);
- return n;
-}
-
-static void
-mark_all_jobs_as_dead ()
-{
- register int i;
- sigset_t set, oset;
-
- if (js.j_jobslots == 0)
- return;
-
- BLOCK_CHILD (set, oset);
-
- /* XXX could use js.j_firstj here */
- for (i = 0; i < js.j_jobslots; i++)
- if (jobs[i])
- {
- jobs[i]->state = JDEAD;
- js.j_ndead++;
- }
-
- UNBLOCK_CHILD (oset);
-}
-
-/* Mark all dead jobs as notified, so delete_job () cleans them out
- of the job table properly. POSIX.2 says we need to save the
- status of the last CHILD_MAX jobs, so we count the number of dead
- jobs and mark only enough as notified to save CHILD_MAX statuses. */
-static void
-mark_dead_jobs_as_notified (force)
- int force;
-{
- register int i, ndead, ndeadproc;
- sigset_t set, oset;
-
- if (js.j_jobslots == 0)
- return;
-
- BLOCK_CHILD (set, oset);
-
- /* If FORCE is non-zero, we don't have to keep CHILD_MAX statuses
- around; just run through the array. */
- if (force)
- {
- /* XXX could use js.j_firstj here */
- for (i = 0; i < js.j_jobslots; i++)
- {
- if (jobs[i] && DEADJOB (i) && (interactive_shell || (find_last_pid (i, 0) != last_asynchronous_pid)))
- jobs[i]->flags |= J_NOTIFIED;
- }
- UNBLOCK_CHILD (oset);
- return;
- }
-
- /* Mark enough dead jobs as notified to keep CHILD_MAX processes left in the
- array with the corresponding not marked as notified. This is a better
- way to avoid pid aliasing and reuse problems than keeping the POSIX-
- mandated CHILD_MAX jobs around. delete_job() takes care of keeping the
- bgpids list regulated. */
-
- /* Count the number of dead jobs */
- /* XXX could use js.j_firstj here */
- for (i = ndead = ndeadproc = 0; i < js.j_jobslots; i++)
- {
-#if defined (DEBUG)
- if (i < js.j_firstj && jobs[i])
- itrace("mark_dead_jobs_as_notified: job %d non-null before js.j_firstj (%d)", i, js.j_firstj);
- if (i > js.j_lastj && jobs[i])
- itrace("mark_dead_jobs_as_notified: job %d non-null after js.j_lastj (%d)", i, js.j_lastj);
-#endif
- if (jobs[i] && DEADJOB (i))
- {
- ndead++;
- ndeadproc += processes_in_job (i);
- }
- }
-
-#ifdef DEBUG
- if (ndeadproc != js.c_reaped)
- itrace("mark_dead_jobs_as_notified: ndeadproc (%d) != js.c_reaped (%d)", ndeadproc, js.c_reaped);
- if (ndead != js.j_ndead)
- itrace("mark_dead_jobs_as_notified: ndead (%d) != js.j_ndead (%d)", ndead, js.j_ndead);
-#endif
-
- if (js.c_childmax < 0)
- js.c_childmax = getmaxchild ();
- if (js.c_childmax < 0)
- js.c_childmax = DEFAULT_CHILD_MAX;
-
- /* Don't do anything if the number of dead processes is less than CHILD_MAX
- and we're not forcing a cleanup. */
- if (ndeadproc <= js.c_childmax)
- {
- UNBLOCK_CHILD (oset);
- return;
- }
-
-#if 0
-itrace("mark_dead_jobs_as_notified: child_max = %d ndead = %d ndeadproc = %d", js.c_childmax, ndead, ndeadproc);
-#endif
-
- /* Mark enough dead jobs as notified that we keep CHILD_MAX jobs in
- the list. This isn't exactly right yet; changes need to be made
- to stop_pipeline so we don't mark the newer jobs after we've
- created CHILD_MAX slots in the jobs array. This needs to be
- integrated with a way to keep the jobs array from growing without
- bound. Maybe we wrap back around to 0 after we reach some max
- limit, and there are sufficient job slots free (keep track of total
- size of jobs array (js.j_jobslots) and running count of number of jobs
- in jobs array. Then keep a job index corresponding to the `oldest job'
- and start this loop there, wrapping around as necessary. In effect,
- we turn the list into a circular buffer. */
- /* XXX could use js.j_firstj here */
- for (i = 0; i < js.j_jobslots; i++)
- {
- if (jobs[i] && DEADJOB (i) && (interactive_shell || (find_last_pid (i, 0) != last_asynchronous_pid)))
- {
-#if defined (DEBUG)
- if (i < js.j_firstj && jobs[i])
- itrace("mark_dead_jobs_as_notified: job %d non-null before js.j_firstj (%d)", i, js.j_firstj);
- if (i > js.j_lastj && jobs[i])
- itrace("mark_dead_jobs_as_notified: job %d non-null after js.j_lastj (%d)", i, js.j_lastj);
-#endif
- /* If marking this job as notified would drop us down below
- child_max, don't mark it so we can keep at least child_max
- statuses. XXX -- need to check what Posix actually says
- about keeping statuses. */
- if ((ndeadproc -= processes_in_job (i)) <= js.c_childmax)
- break;
- jobs[i]->flags |= J_NOTIFIED;
- }
- }
-
- UNBLOCK_CHILD (oset);
-}
-
-/* Here to allow other parts of the shell (like the trap stuff) to
- freeze and unfreeze the jobs list. */
-void
-freeze_jobs_list ()
-{
- jobs_list_frozen = 1;
-}
-
-void
-unfreeze_jobs_list ()
-{
- jobs_list_frozen = 0;
-}
-
-/* Allow or disallow job control to take place. Returns the old value
- of job_control. */
-int
-set_job_control (arg)
- int arg;
-{
- int old;
-
- old = job_control;
- job_control = arg;
-
- /* If we're turning on job control, reset pipeline_pgrp so make_child will
- put new child processes into the right pgrp */
- if (job_control != old && job_control)
- pipeline_pgrp = 0;
-
- return (old);
-}
-
-/* Turn off all traces of job control. This is run by children of the shell
- which are going to do shellsy things, like wait (), etc. */
-void
-without_job_control ()
-{
- stop_making_children ();
- start_pipeline ();
-#if defined (PGRP_PIPE)
- sh_closepipe (pgrp_pipe);
-#endif
- delete_all_jobs (0);
- set_job_control (0);
-}
-
-/* If this shell is interactive, terminate all stopped jobs and
- restore the original terminal process group. This is done
- before the `exec' builtin calls shell_execve. */
-void
-end_job_control ()
-{
- if (interactive_shell) /* XXX - should it be interactive? */
- {
- terminate_stopped_jobs ();
-
- if (original_pgrp >= 0)
- give_terminal_to (original_pgrp, 1);
- }
-
- if (original_pgrp >= 0)
- setpgid (0, original_pgrp);
-}
-
-/* Restart job control by closing shell tty and reinitializing. This is
- called after an exec fails in an interactive shell and we do not exit. */
-void
-restart_job_control ()
-{
- if (shell_tty != -1)
- close (shell_tty);
- initialize_job_control (0);
-}
-
-/* Set the handler to run when the shell receives a SIGCHLD signal. */
-void
-set_sigchld_handler ()
-{
- set_signal_handler (SIGCHLD, sigchld_handler);
-}
-
-#if defined (PGRP_PIPE)
-/* Read from the read end of a pipe. This is how the process group leader
- blocks until all of the processes in a pipeline have been made. */
-static void
-pipe_read (pp)
- int *pp;
-{
- char ch;
-
- if (pp[1] >= 0)
- {
- close (pp[1]);
- pp[1] = -1;
- }
-
- if (pp[0] >= 0)
- {
- while (read (pp[0], &ch, 1) == -1 && errno == EINTR)
- ;
- }
-}
-
-/* Functional interface closes our local-to-job-control pipes. */
-void
-close_pgrp_pipe ()
-{
- sh_closepipe (pgrp_pipe);
-}
-
-void
-save_pgrp_pipe (p, clear)
- int *p;
- int clear;
-{
- p[0] = pgrp_pipe[0];
- p[1] = pgrp_pipe[1];
- if (clear)
- pgrp_pipe[0] = pgrp_pipe[1] = -1;
-}
-
-void
-restore_pgrp_pipe (p)
- int *p;
-{
- pgrp_pipe[0] = p[0];
- pgrp_pipe[1] = p[1];
-}
-
-#endif /* PGRP_PIPE */
+++ /dev/null
-/* gmisc.c -- miscellaneous pattern matching utility functions for Bash.
-
- Copyright (C) 2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne-Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include <config.h>
-
-#include "bashtypes.h"
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include "bashansi.h"
-#include "shmbutil.h"
-
-#include "stdc.h"
-
-#ifndef LPAREN
-# define LPAREN '('
-#endif
-#ifndef RPAREN
-# define RPAREN ')'
-#endif
-
-#if defined (HANDLE_MULTIBYTE)
-#define WLPAREN L'('
-#define WRPAREN L')'
-
-/* Return 1 of the first character of WSTRING could match the first
- character of pattern WPAT. Wide character version. */
-int
-match_pattern_wchar (wpat, wstring)
- wchar_t *wpat, *wstring;
-{
- wchar_t wc;
-
- if (*wstring == 0)
- return (0);
-
- switch (wc = *wpat++)
- {
- default:
- return (*wstring == wc);
- case L'\\':
- return (*wstring == *wpat);
- case L'?':
- return (*wpat == WLPAREN ? 1 : (*wstring != L'\0'));
- case L'*':
- return (1);
- case L'+':
- case L'!':
- case L'@':
- return (*wpat == WLPAREN ? 1 : (*wstring == wc));
- case L'[':
- return (*wstring != L'\0');
- }
-}
-
-int
-wmatchlen (wpat, wmax)
- wchar_t *wpat;
- size_t wmax;
-{
- wchar_t wc;
- int matlen, bracklen, t, in_cclass, in_collsym, in_equiv;
-
- if (*wpat == 0)
- return (0);
-
- matlen = in_cclass = in_collsym = in_equiv = 0;
- while (wc = *wpat++)
- {
- switch (wc)
- {
- default:
- matlen++;
- break;
- case L'\\':
- if (*wpat == 0)
- return ++matlen;
- else
- {
- matlen++;
- wpat++;
- }
- break;
- case L'?':
- if (*wpat == WLPAREN)
- return (matlen = -1); /* XXX for now */
- else
- matlen++;
- break;
- case L'*':
- return (matlen = -1);
- case L'+':
- case L'!':
- case L'@':
- if (*wpat == WLPAREN)
- return (matlen = -1); /* XXX for now */
- else
- matlen++;
- break;
- case L'[':
- /* scan for ending `]', skipping over embedded [:...:] */
- bracklen = 1;
- wc = *wpat++;
- do
- {
- if (wc == 0)
- {
- wpat--; /* back up to NUL */
- matlen += bracklen;
- goto bad_bracket;
- }
- else if (wc == L'\\')
- {
- /* *wpat == backslash-escaped character */
- bracklen++;
- /* If the backslash or backslash-escape ends the string,
- bail. The ++wpat skips over the backslash escape */
- if (*wpat == 0 || *++wpat == 0)
- {
- matlen += bracklen;
- goto bad_bracket;
- }
- }
- else if (wc == L'[' && *wpat == L':') /* character class */
- {
- wpat++;
- in_cclass = 1;
- }
- else if (in_cclass && wc == L':' && *wpat == L']')
- {
- wpat++;
- in_cclass = 0;
- }
- else if (wc == L'[' && *wpat == L'.') /* collating symbol */
- {
- wpat++;
- if (*wpat == L']') /* right bracket can appear as collating symbol */
- wpat++;
- in_collsym = 1;
- }
- else if (in_collsym && wc == L'.' && *wpat == L']')
- {
- wpat++;
- in_collsym = 0;
- }
- else if (wc == L'[' && *wpat == L'=') /* equivalence class */
- {
- wpat++;
- if (*wpat == L']') /* right bracket can appear as equivalence class */
- wpat++;
- in_equiv = 1;
- }
- else if (in_equiv && wc == L'=' && *wpat == L']')
- {
- wpat++;
- in_equiv = 0;
- }
- }
- while ((wc = *wpat++) != L']');
- matlen++; /* bracket expression can only match one char */
-bad_bracket:
- break;
- }
- }
-
- return matlen;
-}
-#endif
-
-/* Return 1 of the first character of STRING could match the first
- character of pattern PAT. Used to avoid n2 calls to strmatch(). */
-int
-match_pattern_char (pat, string)
- char *pat, *string;
-{
- char c;
-
- if (*string == 0)
- return (0);
-
- switch (c = *pat++)
- {
- default:
- return (*string == c);
- case '\\':
- return (*string == *pat);
- case '?':
- return (*pat == LPAREN ? 1 : (*string != '\0'));
- case '*':
- return (1);
- case '+':
- case '!':
- case '@':
- return (*pat == LPAREN ? 1 : (*string == c));
- case '[':
- return (*string != '\0');
- }
-}
-
-int
-umatchlen (pat, max)
- char *pat;
- size_t max;
-{
- char c;
- int matlen, bracklen, t, in_cclass, in_collsym, in_equiv;
-
- if (*pat == 0)
- return (0);
-
- matlen = in_cclass = in_collsym = in_equiv = 0;
- while (c = *pat++)
- {
- switch (c)
- {
- default:
- matlen++;
- break;
- case '\\':
- if (*pat == 0)
- return ++matlen;
- else
- {
- matlen++;
- pat++;
- }
- break;
- case '?':
- if (*pat == LPAREN)
- return (matlen = -1); /* XXX for now */
- else
- matlen++;
- break;
- case '*':
- return (matlen = -1);
- case '+':
- case '!':
- case '@':
- if (*pat == LPAREN)
- return (matlen = -1); /* XXX for now */
- else
- matlen++;
- break;
- case '[':
- /* scan for ending `]', skipping over embedded [:...:] */
- bracklen = 1;
- c = *pat++;
- do
- {
- if (c == 0)
- {
- pat--; /* back up to NUL */
- matlen += bracklen;
- goto bad_bracket;
- }
- else if (c == '\\')
- {
- /* *pat == backslash-escaped character */
- bracklen++;
- /* If the backslash or backslash-escape ends the string,
- bail. The ++pat skips over the backslash escape */
- if (*pat == 0 || *++pat == 0)
- {
- matlen += bracklen;
- goto bad_bracket;
- }
- }
- else if (c == '[' && *pat == ':') /* character class */
- {
- pat++;
- bracklen++;
- in_cclass = 1;
- }
- else if (in_cclass && c == ':' && *pat == ']')
- {
- pat++;
- bracklen++;
- in_cclass = 0;
- }
- else if (c == '[' && *pat == '.') /* collating symbol */
- {
- pat++;
- bracklen++;
- if (*pat == ']') /* right bracket can appear as collating symbol */
- {
- pat++;
- bracklen++;
- }
- in_collsym = 1;
- }
- else if (in_collsym && c == '.' && *pat == ']')
- {
- pat++;
- bracklen++;
- in_collsym = 0;
- }
- else if (c == '[' && *pat == '=') /* equivalence class */
- {
- pat++;
- bracklen++;
- if (*pat == ']') /* right bracket can appear as equivalence class */
- {
- pat++;
- bracklen++;
- }
- in_equiv = 1;
- }
- else if (in_equiv && c == '=' && *pat == ']')
- {
- pat++;
- bracklen++;
- in_equiv = 0;
- }
- else
- bracklen++;
- }
- while ((c = *pat++) != ']');
- matlen++; /* bracket expression can only match one char */
-bad_bracket:
- break;
- }
- }
-
- return matlen;
-}
+++ /dev/null
-/* Copyright (C) 1991-2006 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-int FCT __P((CHAR *, CHAR *, int));
-
-static int GMATCH __P((CHAR *, CHAR *, CHAR *, CHAR *, int));
-static CHAR *PARSE_COLLSYM __P((CHAR *, INT *));
-static CHAR *BRACKMATCH __P((CHAR *, U_CHAR, int));
-static int EXTMATCH __P((INT, CHAR *, CHAR *, CHAR *, CHAR *, int));
-static CHAR *PATSCAN __P((CHAR *, CHAR *, INT));
-
-int
-FCT (pattern, string, flags)
- CHAR *pattern;
- CHAR *string;
- int flags;
-{
- CHAR *se, *pe;
-
- if (string == 0 || pattern == 0)
- return FNM_NOMATCH;
-
- se = string + STRLEN ((XCHAR *)string);
- pe = pattern + STRLEN ((XCHAR *)pattern);
-
- return (GMATCH (string, se, pattern, pe, flags));
-}
-
-/* Match STRING against the filename pattern PATTERN, returning zero if
- it matches, FNM_NOMATCH if not. */
-static int
-GMATCH (string, se, pattern, pe, flags)
- CHAR *string, *se;
- CHAR *pattern, *pe;
- int flags;
-{
- CHAR *p, *n; /* pattern, string */
- INT c; /* current pattern character - XXX U_CHAR? */
- INT sc; /* current string character - XXX U_CHAR? */
-
- p = pattern;
- n = string;
-
- if (string == 0 || pattern == 0)
- return FNM_NOMATCH;
-
-#if DEBUG_MATCHING
-fprintf(stderr, "gmatch: string = %s; se = %s\n", string, se);
-fprintf(stderr, "gmatch: pattern = %s; pe = %s\n", pattern, pe);
-#endif
-
- while (p < pe)
- {
- c = *p++;
- c = FOLD (c);
-
- sc = n < se ? *n : '\0';
-
-#ifdef EXTENDED_GLOB
- /* EXTMATCH () will handle recursively calling GMATCH, so we can
- just return what EXTMATCH() returns. */
- if ((flags & FNM_EXTMATCH) && *p == L('(') &&
- (c == L('+') || c == L('*') || c == L('?') || c == L('@') || c == L('!'))) /* ) */
- {
- int lflags;
- /* If we're not matching the start of the string, we're not
- concerned about the special cases for matching `.' */
- lflags = (n == string) ? flags : (flags & ~FNM_PERIOD);
- return (EXTMATCH (c, n, se, p, pe, lflags));
- }
-#endif /* EXTENDED_GLOB */
-
- switch (c)
- {
- case L('?'): /* Match single character */
- if (sc == '\0')
- return FNM_NOMATCH;
- else if ((flags & FNM_PATHNAME) && sc == L('/'))
- /* If we are matching a pathname, `?' can never match a `/'. */
- return FNM_NOMATCH;
- else if ((flags & FNM_PERIOD) && sc == L('.') &&
- (n == string || ((flags & FNM_PATHNAME) && n[-1] == L('/'))))
- /* `?' cannot match a `.' if it is the first character of the
- string or if it is the first character following a slash and
- we are matching a pathname. */
- return FNM_NOMATCH;
- break;
-
- case L('\\'): /* backslash escape removes special meaning */
- if (p == pe)
- return FNM_NOMATCH;
-
- if ((flags & FNM_NOESCAPE) == 0)
- {
- c = *p++;
- /* A trailing `\' cannot match. */
- if (p > pe)
- return FNM_NOMATCH;
- c = FOLD (c);
- }
- if (FOLD (sc) != (U_CHAR)c)
- return FNM_NOMATCH;
- break;
-
- case '*': /* Match zero or more characters */
- if (p == pe)
- return 0;
-
- if ((flags & FNM_PERIOD) && sc == L('.') &&
- (n == string || ((flags & FNM_PATHNAME) && n[-1] == L('/'))))
- /* `*' cannot match a `.' if it is the first character of the
- string or if it is the first character following a slash and
- we are matching a pathname. */
- return FNM_NOMATCH;
-
- /* Collapse multiple consecutive `*' and `?', but make sure that
- one character of the string is consumed for each `?'. */
- for (c = *p++; (c == L('?') || c == L('*')); c = *p++)
- {
- if ((flags & FNM_PATHNAME) && sc == L('/'))
- /* A slash does not match a wildcard under FNM_PATHNAME. */
- return FNM_NOMATCH;
-#ifdef EXTENDED_GLOB
- else if ((flags & FNM_EXTMATCH) && c == L('?') && *p == L('(')) /* ) */
- {
- CHAR *newn;
- for (newn = n; newn < se; ++newn)
- {
- if (EXTMATCH (c, newn, se, p, pe, flags) == 0)
- return (0);
- }
- /* We didn't match. If we have a `?(...)', that's failure. */
- return FNM_NOMATCH;
- }
-#endif
- else if (c == L('?'))
- {
- if (sc == L('\0'))
- return FNM_NOMATCH;
- /* One character of the string is consumed in matching
- this ? wildcard, so *??? won't match if there are
- fewer than three characters. */
- n++;
- sc = n < se ? *n : '\0';
- }
-
-#ifdef EXTENDED_GLOB
- /* Handle ******(patlist) */
- if ((flags & FNM_EXTMATCH) && c == L('*') && *p == L('(')) /*)*/
- {
- CHAR *newn;
- /* We need to check whether or not the extended glob
- pattern matches the remainder of the string.
- If it does, we match the entire pattern. */
- for (newn = n; newn < se; ++newn)
- {
- if (EXTMATCH (c, newn, se, p, pe, flags) == 0)
- return (0);
- }
- /* We didn't match the extended glob pattern, but
- that's OK, since we can match 0 or more occurrences.
- We need to skip the glob pattern and see if we
- match the rest of the string. */
- newn = PATSCAN (p + 1, pe, 0);
- /* If NEWN is 0, we have an ill-formed pattern. */
- p = newn ? newn : pe;
- }
-#endif
- if (p == pe)
- break;
- }
-
- /* If we've hit the end of the pattern and the last character of
- the pattern was handled by the loop above, we've succeeded.
- Otherwise, we need to match that last character. */
- if (p == pe && (c == L('?') || c == L('*')))
- return (0);
-
- /* General case, use recursion. */
- {
- U_CHAR c1;
-
- c1 = ((flags & FNM_NOESCAPE) == 0 && c == L('\\')) ? *p : c;
- c1 = FOLD (c1);
- for (--p; n < se; ++n)
- {
- /* Only call strmatch if the first character indicates a
- possible match. We can check the first character if
- we're not doing an extended glob match. */
- if ((flags & FNM_EXTMATCH) == 0 && c != L('[') && FOLD (*n) != c1) /*]*/
- continue;
-
- /* If we're doing an extended glob match and the pattern is not
- one of the extended glob patterns, we can check the first
- character. */
- if ((flags & FNM_EXTMATCH) && p[1] != L('(') && /*)*/
- STRCHR (L("?*+@!"), *p) == 0 && c != L('[') && FOLD (*n) != c1) /*]*/
- continue;
-
- /* Otherwise, we just recurse. */
- if (GMATCH (n, se, p, pe, flags & ~FNM_PERIOD) == 0)
- return (0);
- }
- return FNM_NOMATCH;
- }
-
- case L('['):
- {
- if (sc == L('\0') || n == se)
- return FNM_NOMATCH;
-
- /* A character class cannot match a `.' if it is the first
- character of the string or if it is the first character
- following a slash and we are matching a pathname. */
- if ((flags & FNM_PERIOD) && sc == L('.') &&
- (n == string || ((flags & FNM_PATHNAME) && n[-1] == L('/'))))
- return (FNM_NOMATCH);
-
- p = BRACKMATCH (p, sc, flags);
- if (p == 0)
- return FNM_NOMATCH;
- }
- break;
-
- default:
- if ((U_CHAR)c != FOLD (sc))
- return (FNM_NOMATCH);
- }
-
- ++n;
- }
-
- if (n == se)
- return (0);
-
- if ((flags & FNM_LEADING_DIR) && *n == L('/'))
- /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz". */
- return 0;
-
- return (FNM_NOMATCH);
-}
-
-/* Parse a bracket expression collating symbol ([.sym.]) starting at P, find
- the value of the symbol, and move P past the collating symbol expression.
- The value is returned in *VP, if VP is not null. */
-static CHAR *
-PARSE_COLLSYM (p, vp)
- CHAR *p;
- INT *vp;
-{
- register int pc;
- INT val;
-
- p++; /* move past the `.' */
-
- for (pc = 0; p[pc]; pc++)
- if (p[pc] == L('.') && p[pc+1] == L(']'))
- break;
- val = COLLSYM (p, pc);
- if (vp)
- *vp = val;
- return (p + pc + 2);
-}
-
-/* Use prototype definition here because of type promotion. */
-static CHAR *
-#if defined (PROTOTYPES)
-BRACKMATCH (CHAR *p, U_CHAR test, int flags)
-#else
-BRACKMATCH (p, test, flags)
- CHAR *p;
- U_CHAR test;
- int flags;
-#endif
-{
- register CHAR cstart, cend, c;
- register int not; /* Nonzero if the sense of the character class is inverted. */
- int brcnt, forcecoll;;
- INT pc;
- CHAR *savep;
-
- test = FOLD (test);
-
- savep = p;
-
- /* POSIX.2 3.13.1 says that an exclamation mark (`!') shall replace the
- circumflex (`^') in its role in a `nonmatching list'. A bracket
- expression starting with an unquoted circumflex character produces
- unspecified results. This implementation treats the two identically. */
- if (not = (*p == L('!') || *p == L('^')))
- ++p;
-
- c = *p++;
- for (;;)
- {
- /* Initialize cstart and cend in case `-' is the last
- character of the pattern. */
- cstart = cend = c;
- forcecoll = 0;
-
- /* POSIX.2 equivalence class: [=c=]. See POSIX.2 2.8.3.2. Find
- the end of the equivalence class, move the pattern pointer past
- it, and check for equivalence. XXX - this handles only
- single-character equivalence classes, which is wrong, or at
- least incomplete. */
- if (c == L('[') && *p == L('=') && p[2] == L('=') && p[3] == L(']'))
- {
- pc = FOLD (p[1]);
- p += 4;
- if (COLLEQUIV (test, pc))
- {
-/*[*/ /* Move past the closing `]', since the first thing we do at
- the `matched:' label is back p up one. */
- p++;
- goto matched;
- }
- else
- {
- c = *p++;
- if (c == L('\0'))
- return ((test == L('[')) ? savep : (CHAR *)0); /*]*/
- c = FOLD (c);
- continue;
- }
- }
-
- /* POSIX.2 character class expression. See POSIX.2 2.8.3.2. */
- if (c == L('[') && *p == L(':'))
- {
- CHAR *close, *ccname;
-
- pc = 0; /* make sure invalid char classes don't match. */
- /* Find end of character class name */
- for (close = p + 1; *close != '\0'; close++)
- if (*close == L(':') && *(close+1) == L(']'))
- break;
-
- if (*close != L('\0'))
- {
- ccname = (CHAR *)malloc ((close - p) * sizeof (CHAR));
- if (ccname == 0)
- pc = 0;
- else
- {
- bcopy (p + 1, ccname, (close - p - 1) * sizeof (CHAR));
- *(ccname + (close - p - 1)) = L('\0');
- pc = IS_CCLASS (test, (XCHAR *)ccname);
- }
- if (pc == -1)
- pc = 0;
- else
- p = close + 2;
-
- free (ccname);
- }
-
- if (pc)
- {
-/*[*/ /* Move past the closing `]', since the first thing we do at
- the `matched:' label is back p up one. */
- p++;
- goto matched;
- }
- else
- {
- /* continue the loop here, since this expression can't be
- the first part of a range expression. */
- c = *p++;
- if (c == L('\0'))
- return ((test == L('[')) ? savep : (CHAR *)0);
- else if (c == L(']'))
- break;
- c = FOLD (c);
- continue;
- }
- }
-
- /* POSIX.2 collating symbols. See POSIX.2 2.8.3.2. Find the end of
- the symbol name, make sure it is terminated by `.]', translate
- the name to a character using the external table, and do the
- comparison. */
- if (c == L('[') && *p == L('.'))
- {
- p = PARSE_COLLSYM (p, &pc);
- /* An invalid collating symbol cannot be the first point of a
- range. If it is, we set cstart to one greater than `test',
- so any comparisons later will fail. */
- cstart = (pc == INVALID) ? test + 1 : pc;
- forcecoll = 1;
- }
-
- if (!(flags & FNM_NOESCAPE) && c == L('\\'))
- {
- if (*p == '\0')
- return (CHAR *)0;
- cstart = cend = *p++;
- }
-
- cstart = cend = FOLD (cstart);
-
- /* POSIX.2 2.8.3.1.2 says: `An expression containing a `[' that
- is not preceded by a backslash and is not part of a bracket
- expression produces undefined results.' This implementation
- treats the `[' as just a character to be matched if there is
- not a closing `]'. */
- if (c == L('\0'))
- return ((test == L('[')) ? savep : (CHAR *)0);
-
- c = *p++;
- c = FOLD (c);
-
- if ((flags & FNM_PATHNAME) && c == L('/'))
- /* [/] can never match when matching a pathname. */
- return (CHAR *)0;
-
- /* This introduces a range, unless the `-' is the last
- character of the class. Find the end of the range
- and move past it. */
- if (c == L('-') && *p != L(']'))
- {
- cend = *p++;
- if (!(flags & FNM_NOESCAPE) && cend == L('\\'))
- cend = *p++;
- if (cend == L('\0'))
- return (CHAR *)0;
- if (cend == L('[') && *p == L('.'))
- {
- p = PARSE_COLLSYM (p, &pc);
- /* An invalid collating symbol cannot be the second part of a
- range expression. If we get one, we set cend to one fewer
- than the test character to make sure the range test fails. */
- cend = (pc == INVALID) ? test - 1 : pc;
- forcecoll = 1;
- }
- cend = FOLD (cend);
-
- c = *p++;
-
- /* POSIX.2 2.8.3.2: ``The ending range point shall collate
- equal to or higher than the starting range point; otherwise
- the expression shall be treated as invalid.'' Note that this
- applies to only the range expression; the rest of the bracket
- expression is still checked for matches. */
- if (RANGECMP (cstart, cend, forcecoll) > 0)
- {
- if (c == L(']'))
- break;
- c = FOLD (c);
- continue;
- }
- }
-
- if (RANGECMP (test, cstart, forcecoll) >= 0 && RANGECMP (test, cend, forcecoll) <= 0)
- goto matched;
-
- if (c == L(']'))
- break;
- }
- /* No match. */
- return (!not ? (CHAR *)0 : p);
-
-matched:
- /* Skip the rest of the [...] that already matched. */
- c = *--p;
- brcnt = 1;
- while (brcnt > 0)
- {
- /* A `[' without a matching `]' is just another character to match. */
- if (c == L('\0'))
- return ((test == L('[')) ? savep : (CHAR *)0);
-
- c = *p++;
- if (c == L('[') && (*p == L('=') || *p == L(':') || *p == L('.')))
- brcnt++;
- else if (c == L(']'))
- brcnt--;
- else if (!(flags & FNM_NOESCAPE) && c == L('\\'))
- {
- if (*p == '\0')
- return (CHAR *)0;
- /* XXX 1003.2d11 is unclear if this is right. */
- ++p;
- }
- }
- return (not ? (CHAR *)0 : p);
-}
-
-#if defined (EXTENDED_GLOB)
-/* ksh-like extended pattern matching:
-
- [?*+@!](pat-list)
-
- where pat-list is a list of one or patterns separated by `|'. Operation
- is as follows:
-
- ?(patlist) match zero or one of the given patterns
- *(patlist) match zero or more of the given patterns
- +(patlist) match one or more of the given patterns
- @(patlist) match exactly one of the given patterns
- !(patlist) match anything except one of the given patterns
-*/
-
-/* Scan a pattern starting at STRING and ending at END, keeping track of
- embedded () and []. If DELIM is 0, we scan until a matching `)'
- because we're scanning a `patlist'. Otherwise, we scan until we see
- DELIM. In all cases, we never scan past END. The return value is the
- first character after the matching DELIM. */
-static CHAR *
-PATSCAN (string, end, delim)
- CHAR *string, *end;
- INT delim;
-{
- int pnest, bnest, skip;
- INT cchar;
- CHAR *s, c, *bfirst;
-
- pnest = bnest = skip = 0;
- cchar = 0;
- bfirst = NULL;
-
- for (s = string; c = *s; s++)
- {
- if (s >= end)
- return (s);
- if (skip)
- {
- skip = 0;
- continue;
- }
- switch (c)
- {
- case L('\\'):
- skip = 1;
- break;
-
- case L('\0'):
- return ((CHAR *)NULL);
-
- /* `[' is not special inside a bracket expression, but it may
- introduce one of the special POSIX bracket expressions
- ([.SYM.], [=c=], [: ... :]) that needs special handling. */
- case L('['):
- if (bnest == 0)
- {
- bfirst = s + 1;
- if (*bfirst == L('!') || *bfirst == L('^'))
- bfirst++;
- bnest++;
- }
- else if (s[1] == L(':') || s[1] == L('.') || s[1] == L('='))
- cchar = s[1];
- break;
-
- /* `]' is not special if it's the first char (after a leading `!'
- or `^') in a bracket expression or if it's part of one of the
- special POSIX bracket expressions ([.SYM.], [=c=], [: ... :]) */
- case L(']'):
- if (bnest)
- {
- if (cchar && s[-1] == cchar)
- cchar = 0;
- else if (s != bfirst)
- {
- bnest--;
- bfirst = 0;
- }
- }
- break;
-
- case L('('):
- if (bnest == 0)
- pnest++;
- break;
-
- case L(')'):
- if (bnest == 0 && pnest-- <= 0)
- return ++s;
- break;
-
- case L('|'):
- if (bnest == 0 && pnest == 0 && delim == L('|'))
- return ++s;
- break;
- }
- }
-
- return (NULL);
-}
-
-/* Return 0 if dequoted pattern matches S in the current locale. */
-static int
-STRCOMPARE (p, pe, s, se)
- CHAR *p, *pe, *s, *se;
-{
- int ret;
- CHAR c1, c2;
-
- c1 = *pe;
- c2 = *se;
-
- *pe = *se = '\0';
-#if HAVE_MULTIBYTE || defined (HAVE_STRCOLL)
- ret = STRCOLL ((XCHAR *)p, (XCHAR *)s);
-#else
- ret = STRCMP ((XCHAR *)p, (XCHAR *)s);
-#endif
-
- *pe = c1;
- *se = c2;
-
- return (ret == 0 ? ret : FNM_NOMATCH);
-}
-
-/* Match a ksh extended pattern specifier. Return FNM_NOMATCH on failure or
- 0 on success. This is handed the entire rest of the pattern and string
- the first time an extended pattern specifier is encountered, so it calls
- gmatch recursively. */
-static int
-EXTMATCH (xc, s, se, p, pe, flags)
- INT xc; /* select which operation */
- CHAR *s, *se;
- CHAR *p, *pe;
- int flags;
-{
- CHAR *prest; /* pointer to rest of pattern */
- CHAR *psub; /* pointer to sub-pattern */
- CHAR *pnext; /* pointer to next sub-pattern */
- CHAR *srest; /* pointer to rest of string */
- int m1, m2, xflags; /* xflags = flags passed to recursive matches */
-
-#if DEBUG_MATCHING
-fprintf(stderr, "extmatch: xc = %c\n", xc);
-fprintf(stderr, "extmatch: s = %s; se = %s\n", s, se);
-fprintf(stderr, "extmatch: p = %s; pe = %s\n", p, pe);
-fprintf(stderr, "extmatch: flags = %d\n", flags);
-#endif
-
- prest = PATSCAN (p + (*p == L('(')), pe, 0); /* ) */
- if (prest == 0)
- /* If PREST is 0, we failed to scan a valid pattern. In this
- case, we just want to compare the two as strings. */
- return (STRCOMPARE (p - 1, pe, s, se));
-
- switch (xc)
- {
- case L('+'): /* match one or more occurrences */
- case L('*'): /* match zero or more occurrences */
- /* If we can get away with no matches, don't even bother. Just
- call GMATCH on the rest of the pattern and return success if
- it succeeds. */
- if (xc == L('*') && (GMATCH (s, se, prest, pe, flags) == 0))
- return 0;
-
- /* OK, we have to do this the hard way. First, we make sure one of
- the subpatterns matches, then we try to match the rest of the
- string. */
- for (psub = p + 1; ; psub = pnext)
- {
- pnext = PATSCAN (psub, pe, L('|'));
- for (srest = s; srest <= se; srest++)
- {
- /* Match this substring (S -> SREST) against this
- subpattern (psub -> pnext - 1) */
- m1 = GMATCH (s, srest, psub, pnext - 1, flags) == 0;
- /* OK, we matched a subpattern, so make sure the rest of the
- string matches the rest of the pattern. Also handle
- multiple matches of the pattern. */
- if (m1)
- {
- /* if srest > s, we are not at start of string */
- xflags = (srest > s) ? (flags & ~FNM_PERIOD) : flags;
- m2 = (GMATCH (srest, se, prest, pe, xflags) == 0) ||
- (s != srest && GMATCH (srest, se, p - 1, pe, xflags) == 0);
- }
- if (m1 && m2)
- return (0);
- }
- if (pnext == prest)
- break;
- }
- return (FNM_NOMATCH);
-
- case L('?'): /* match zero or one of the patterns */
- case L('@'): /* match one (or more) of the patterns */
- /* If we can get away with no matches, don't even bother. Just
- call gmatch on the rest of the pattern and return success if
- it succeeds. */
- if (xc == L('?') && (GMATCH (s, se, prest, pe, flags) == 0))
- return 0;
-
- /* OK, we have to do this the hard way. First, we see if one of
- the subpatterns matches, then, if it does, we try to match the
- rest of the string. */
- for (psub = p + 1; ; psub = pnext)
- {
- pnext = PATSCAN (psub, pe, L('|'));
- srest = (prest == pe) ? se : s;
- for ( ; srest <= se; srest++)
- {
- /* if srest > s, we are not at start of string */
- xflags = (srest > s) ? (flags & ~FNM_PERIOD) : flags;
- if (GMATCH (s, srest, psub, pnext - 1, flags) == 0 &&
- GMATCH (srest, se, prest, pe, xflags) == 0)
- return (0);
- }
- if (pnext == prest)
- break;
- }
- return (FNM_NOMATCH);
-
- case '!': /* match anything *except* one of the patterns */
- for (srest = s; srest <= se; srest++)
- {
- m1 = 0;
- for (psub = p + 1; ; psub = pnext)
- {
- pnext = PATSCAN (psub, pe, L('|'));
- /* If one of the patterns matches, just bail immediately. */
- if (m1 = (GMATCH (s, srest, psub, pnext - 1, flags) == 0))
- break;
- if (pnext == prest)
- break;
- }
- /* if srest > s, we are not at start of string */
- xflags = (srest > s) ? (flags & ~FNM_PERIOD) : flags;
- if (m1 == 0 && GMATCH (srest, se, prest, pe, xflags) == 0)
- return (0);
- }
- return (FNM_NOMATCH);
- }
-
- return (FNM_NOMATCH);
-}
-#endif /* EXTENDED_GLOB */
-
-#undef IS_CCLASS
-#undef FOLD
-#undef CHAR
-#undef U_CHAR
-#undef XCHAR
-#undef INT
-#undef INVALID
-#undef FCT
-#undef GMATCH
-#undef COLLSYM
-#undef PARSE_COLLSYM
-#undef PATSCAN
-#undef STRCOMPARE
-#undef EXTMATCH
-#undef BRACKMATCH
-#undef STRCHR
-#undef STRCOLL
-#undef STRLEN
-#undef STRCMP
-#undef COLLEQUIV
-#undef RANGECMP
-#undef L
+++ /dev/null
-/* strmatch.c -- ksh-like extended pattern matching for the shell and filename
- globbing. */
-
-/* Copyright (C) 1991-2011 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include <config.h>
-
-#include <stdio.h> /* for debugging */
-
-#include "strmatch.h"
-#include <chartypes.h>
-
-#include "bashansi.h"
-#include "shmbutil.h"
-#include "xmalloc.h"
-
-/* First, compile `sm_loop.c' for single-byte characters. */
-#define CHAR unsigned char
-#define U_CHAR unsigned char
-#define XCHAR char
-#define INT int
-#define L(CS) CS
-#define INVALID -1
-
-#undef STREQ
-#undef STREQN
-#define STREQ(a, b) ((a)[0] == (b)[0] && strcmp(a, b) == 0)
-#define STREQN(a, b, n) ((a)[0] == (b)[0] && strncmp(a, b, n) == 0)
-
-int glob_asciirange = 0;
-
-/* We use strcoll(3) for range comparisons in bracket expressions,
- even though it can have unwanted side effects in locales
- other than POSIX or US. For instance, in the de locale, [A-Z] matches
- all characters. */
-
-#if defined (HAVE_STRCOLL)
-/* Helper function for collating symbol equivalence. */
-static int
-rangecmp (c1, c2, forcecoll)
- int c1, c2;
- int forcecoll;
-{
- static char s1[2] = { ' ', '\0' };
- static char s2[2] = { ' ', '\0' };
- int ret;
-
- /* Eight bits only. Period. */
- c1 &= 0xFF;
- c2 &= 0xFF;
-
- if (c1 == c2)
- return (0);
-
- if (forcecoll == 0 && glob_asciirange)
- return (c1 - c2);
-
- s1[0] = c1;
- s2[0] = c2;
-
- if ((ret = strcoll (s1, s2)) != 0)
- return ret;
- return (c1 - c2);
-}
-#else /* !HAVE_STRCOLL */
-# define rangecmp(c1, c2, f) ((int)(c1) - (int)(c2))
-#endif /* !HAVE_STRCOLL */
-
-#if defined (HAVE_STRCOLL)
-static int
-collequiv (c1, c2)
- int c1, c2;
-{
- return (rangecmp (c1, c2, 1) == 0);
-}
-#else
-# define collequiv(c1, c2) ((c1) == (c2))
-#endif
-
-#define _COLLSYM _collsym
-#define __COLLSYM __collsym
-#define POSIXCOLL posix_collsyms
-#include "collsyms.h"
-
-static int
-collsym (s, len)
- CHAR *s;
- int len;
-{
- register struct _collsym *csp;
- char *x;
-
- x = (char *)s;
- for (csp = posix_collsyms; csp->name; csp++)
- {
- if (STREQN(csp->name, x, len) && csp->name[len] == '\0')
- return (csp->code);
- }
- if (len == 1)
- return s[0];
- return INVALID;
-}
-
-/* unibyte character classification */
-#if !defined (isascii) && !defined (HAVE_ISASCII)
-# define isascii(c) ((unsigned int)(c) <= 0177)
-#endif
-
-enum char_class
- {
- CC_NO_CLASS = 0,
- CC_ASCII, CC_ALNUM, CC_ALPHA, CC_BLANK, CC_CNTRL, CC_DIGIT, CC_GRAPH,
- CC_LOWER, CC_PRINT, CC_PUNCT, CC_SPACE, CC_UPPER, CC_WORD, CC_XDIGIT
- };
-
-static char const *const cclass_name[] =
- {
- "",
- "ascii", "alnum", "alpha", "blank", "cntrl", "digit", "graph",
- "lower", "print", "punct", "space", "upper", "word", "xdigit"
- };
-
-#define N_CHAR_CLASS (sizeof(cclass_name) / sizeof (cclass_name[0]))
-
-static int
-is_cclass (c, name)
- int c;
- const char *name;
-{
- enum char_class char_class = CC_NO_CLASS;
- int i, result;
-
- for (i = 1; i < N_CHAR_CLASS; i++)
- {
- if (STREQ (name, cclass_name[i]))
- {
- char_class = (enum char_class)i;
- break;
- }
- }
-
- if (char_class == 0)
- return -1;
-
- switch (char_class)
- {
- case CC_ASCII:
- result = isascii (c);
- break;
- case CC_ALNUM:
- result = ISALNUM (c);
- break;
- case CC_ALPHA:
- result = ISALPHA (c);
- break;
- case CC_BLANK:
- result = ISBLANK (c);
- break;
- case CC_CNTRL:
- result = ISCNTRL (c);
- break;
- case CC_DIGIT:
- result = ISDIGIT (c);
- break;
- case CC_GRAPH:
- result = ISGRAPH (c);
- break;
- case CC_LOWER:
- result = ISLOWER (c);
- break;
- case CC_PRINT:
- result = ISPRINT (c);
- break;
- case CC_PUNCT:
- result = ISPUNCT (c);
- break;
- case CC_SPACE:
- result = ISSPACE (c);
- break;
- case CC_UPPER:
- result = ISUPPER (c);
- break;
- case CC_WORD:
- result = (ISALNUM (c) || c == '_');
- break;
- case CC_XDIGIT:
- result = ISXDIGIT (c);
- break;
- default:
- result = -1;
- break;
- }
-
- return result;
-}
-
-/* Now include `sm_loop.c' for single-byte characters. */
-/* The result of FOLD is an `unsigned char' */
-# define FOLD(c) ((flags & FNM_CASEFOLD) \
- ? TOLOWER ((unsigned char)c) \
- : ((unsigned char)c))
-
-#define FCT internal_strmatch
-#define GMATCH gmatch
-#define COLLSYM collsym
-#define PARSE_COLLSYM parse_collsym
-#define BRACKMATCH brackmatch
-#define PATSCAN patscan
-#define STRCOMPARE strcompare
-#define EXTMATCH extmatch
-#define STRCHR(S, C) strchr((S), (C))
-#define STRCOLL(S1, S2) strcoll((S1), (S2))
-#define STRLEN(S) strlen(S)
-#define STRCMP(S1, S2) strcmp((S1), (S2))
-#define RANGECMP(C1, C2, F) rangecmp((C1), (C2), (F))
-#define COLLEQUIV(C1, C2) collequiv((C1), (C2))
-#define CTYPE_T enum char_class
-#define IS_CCLASS(C, S) is_cclass((C), (S))
-#include "sm_loop.c"
-
-#if HANDLE_MULTIBYTE
-
-# define CHAR wchar_t
-# define U_CHAR wint_t
-# define XCHAR wchar_t
-# define INT wint_t
-# define L(CS) L##CS
-# define INVALID WEOF
-
-# undef STREQ
-# undef STREQN
-# define STREQ(s1, s2) ((wcscmp (s1, s2) == 0))
-# define STREQN(a, b, n) ((a)[0] == (b)[0] && wcsncmp(a, b, n) == 0)
-
-extern char *mbsmbchar __P((const char *));
-
-static int
-rangecmp_wc (c1, c2, forcecoll)
- wint_t c1, c2;
- int forcecoll;
-{
- static wchar_t s1[2] = { L' ', L'\0' };
- static wchar_t s2[2] = { L' ', L'\0' };
-
- if (c1 == c2)
- return 0;
-
- if (forcecoll == 0 && glob_asciirange && c1 <= UCHAR_MAX && c2 <= UCHAR_MAX)
- return ((int)(c1 - c2));
-
- s1[0] = c1;
- s2[0] = c2;
-
- return (wcscoll (s1, s2));
-}
-
-static int
-collequiv_wc (c, equiv)
- wint_t c, equiv;
-{
- return (c == equiv);
-}
-
-/* Helper function for collating symbol. */
-# define _COLLSYM _collwcsym
-# define __COLLSYM __collwcsym
-# define POSIXCOLL posix_collwcsyms
-# include "collsyms.h"
-
-static wint_t
-collwcsym (s, len)
- wchar_t *s;
- int len;
-{
- register struct _collwcsym *csp;
-
- for (csp = posix_collwcsyms; csp->name; csp++)
- {
- if (STREQN(csp->name, s, len) && csp->name[len] == L'\0')
- return (csp->code);
- }
- if (len == 1)
- return s[0];
- return INVALID;
-}
-
-static int
-is_wcclass (wc, name)
- wint_t wc;
- wchar_t *name;
-{
- char *mbs;
- mbstate_t state;
- size_t mbslength;
- wctype_t desc;
- int want_word;
-
- if ((wctype ("ascii") == (wctype_t)0) && (wcscmp (name, L"ascii") == 0))
- {
- int c;
-
- if ((c = wctob (wc)) == EOF)
- return 0;
- else
- return (c <= 0x7F);
- }
-
- want_word = (wcscmp (name, L"word") == 0);
- if (want_word)
- name = L"alnum";
-
- memset (&state, '\0', sizeof (mbstate_t));
- mbs = (char *) malloc (wcslen(name) * MB_CUR_MAX + 1);
- mbslength = wcsrtombs (mbs, (const wchar_t **)&name, (wcslen(name) * MB_CUR_MAX + 1), &state);
-
- if (mbslength == (size_t)-1 || mbslength == (size_t)-2)
- {
- free (mbs);
- return -1;
- }
- desc = wctype (mbs);
- free (mbs);
-
- if (desc == (wctype_t)0)
- return -1;
-
- if (want_word)
- return (iswctype (wc, desc) || wc == L'_');
- else
- return (iswctype (wc, desc));
-}
-
-/* Now include `sm_loop.c' for multibyte characters. */
-#define FOLD(c) ((flags & FNM_CASEFOLD) && iswupper (c) ? towlower (c) : (c))
-#define FCT internal_wstrmatch
-#define GMATCH gmatch_wc
-#define COLLSYM collwcsym
-#define PARSE_COLLSYM parse_collwcsym
-#define BRACKMATCH brackmatch_wc
-#define PATSCAN patscan_wc
-#define STRCOMPARE wscompare
-#define EXTMATCH extmatch_wc
-#define STRCHR(S, C) wcschr((S), (C))
-#define STRCOLL(S1, S2) wcscoll((S1), (S2))
-#define STRLEN(S) wcslen(S)
-#define STRCMP(S1, S2) wcscmp((S1), (S2))
-#define RANGECMP(C1, C2, F) rangecmp_wc((C1), (C2), (F))
-#define COLLEQUIV(C1, C2) collequiv_wc((C1), (C2))
-#define CTYPE_T enum char_class
-#define IS_CCLASS(C, S) is_wcclass((C), (S))
-#include "sm_loop.c"
-
-#endif /* HAVE_MULTIBYTE */
-
-int
-xstrmatch (pattern, string, flags)
- char *pattern;
- char *string;
- int flags;
-{
-#if HANDLE_MULTIBYTE
- int ret;
- size_t n;
- wchar_t *wpattern, *wstring;
- size_t plen, slen, mplen, mslen;
-
- if (mbsmbchar (string) == 0 && mbsmbchar (pattern) == 0)
- return (internal_strmatch ((unsigned char *)pattern, (unsigned char *)string, flags));
-
- if (MB_CUR_MAX == 1)
- return (internal_strmatch ((unsigned char *)pattern, (unsigned char *)string, flags));
-
- n = xdupmbstowcs (&wpattern, NULL, pattern);
- if (n == (size_t)-1 || n == (size_t)-2)
- return (internal_strmatch ((unsigned char *)pattern, (unsigned char *)string, flags));
-
- n = xdupmbstowcs (&wstring, NULL, string);
- if (n == (size_t)-1 || n == (size_t)-2)
- {
- free (wpattern);
- return (internal_strmatch ((unsigned char *)pattern, (unsigned char *)string, flags));
- }
-
- ret = internal_wstrmatch (wpattern, wstring, flags);
-
- free (wpattern);
- free (wstring);
-
- return ret;
-#else
- return (internal_strmatch ((unsigned char *)pattern, (unsigned char *)string, flags));
-#endif /* !HANDLE_MULTIBYTE */
-}
+++ /dev/null
-/* rlprivate.h -- functions and variables global to the readline library,
- but not intended for use by applications. */
-
-/* Copyright (C) 1999-2010 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined (_RL_PRIVATE_H_)
-#define _RL_PRIVATE_H_
-
-#include "rlconf.h" /* for VISIBLE_STATS */
-#include "rlstdc.h"
-#include "posixjmp.h" /* defines procenv_t */
-
-/*************************************************************************
- * *
- * Convenience definitions *
- * *
- *************************************************************************/
-
-#define EMACS_MODE() (rl_editing_mode == emacs_mode)
-#define VI_COMMAND_MODE() (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap)
-#define VI_INSERT_MODE() (rl_editing_mode == vi_mode && _rl_keymap == vi_insertion_keymap)
-
-#define RL_CHECK_SIGNALS() \
- do { \
- if (_rl_caught_signal) _rl_signal_handler (_rl_caught_signal); \
- } while (0)
-
-/*************************************************************************
- * *
- * Global structs undocumented in texinfo manual and not in readline.h *
- * *
- *************************************************************************/
-/* search types */
-#define RL_SEARCH_ISEARCH 0x01 /* incremental search */
-#define RL_SEARCH_NSEARCH 0x02 /* non-incremental search */
-#define RL_SEARCH_CSEARCH 0x04 /* intra-line char search */
-
-/* search flags */
-#define SF_REVERSE 0x01
-#define SF_FOUND 0x02
-#define SF_FAILED 0x04
-#define SF_CHGKMAP 0x08
-
-typedef struct __rl_search_context
-{
- int type;
- int sflags;
-
- char *search_string;
- int search_string_index;
- int search_string_size;
-
- char **lines;
- char *allocated_line;
- int hlen;
- int hindex;
-
- int save_point;
- int save_mark;
- int save_line;
- int last_found_line;
- char *prev_line_found;
-
- UNDO_LIST *save_undo_list;
-
- Keymap keymap; /* used when dispatching commands in search string */
- Keymap okeymap; /* original keymap */
-
- int history_pos;
- int direction;
-
- int lastc;
-#if defined (HANDLE_MULTIBYTE)
- char mb[MB_LEN_MAX];
-#endif
-
- char *sline;
- int sline_len;
- int sline_index;
-
- char *search_terminators;
-} _rl_search_cxt;
-
-/* Callback data for reading numeric arguments */
-#define NUM_SAWMINUS 0x01
-#define NUM_SAWDIGITS 0x02
-#define NUM_READONE 0x04
-
-typedef int _rl_arg_cxt;
-
-/* A context for reading key sequences longer than a single character when
- using the callback interface. */
-#define KSEQ_DISPATCHED 0x01
-#define KSEQ_SUBSEQ 0x02
-#define KSEQ_RECURSIVE 0x04
-
-typedef struct __rl_keyseq_context
-{
- int flags;
- int subseq_arg;
- int subseq_retval; /* XXX */
- Keymap dmap;
-
- Keymap oldmap;
- int okey;
- struct __rl_keyseq_context *ocxt;
- int childval;
-} _rl_keyseq_cxt;
-
-/* vi-mode commands that use result of motion command to define boundaries */
-#define VIM_DELETE 0x01
-#define VIM_CHANGE 0x02
-#define VIM_YANK 0x04
-
-/* various states for vi-mode commands that use motion commands. reflects
- RL_READLINE_STATE */
-#define VMSTATE_READ 0x01
-#define VMSTATE_NUMARG 0x02
-
-typedef struct __rl_vimotion_context
-{
- int op;
- int state;
- int flags; /* reserved */
- _rl_arg_cxt ncxt;
- int numeric_arg;
- int start, end; /* rl_point, rl_end */
- int key, motion; /* initial key, motion command */
-} _rl_vimotion_cxt;
-
-/* fill in more as needed */
-/* `Generic' callback data and functions */
-typedef struct __rl_callback_generic_arg
-{
- int count;
- int i1, i2;
- /* add here as needed */
-} _rl_callback_generic_arg;
-
-typedef int _rl_callback_func_t PARAMS((_rl_callback_generic_arg *));
-
-/*************************************************************************
- * *
- * Global functions undocumented in texinfo manual and not in readline.h *
- * *
- *************************************************************************/
-
-/*************************************************************************
- * *
- * Global variables undocumented in texinfo manual and not in readline.h *
- * *
- *************************************************************************/
-
-/* complete.c */
-extern int rl_complete_with_tilde_expansion;
-#if defined (VISIBLE_STATS)
-extern int rl_visible_stats;
-#endif /* VISIBLE_STATS */
-
-/* readline.c */
-extern int rl_line_buffer_len;
-extern int rl_arg_sign;
-extern int rl_visible_prompt_length;
-extern int rl_key_sequence_length;
-extern int rl_byte_oriented;
-
-/* display.c */
-extern int rl_display_fixed;
-
-/* parens.c */
-extern int rl_blink_matching_paren;
-
-/*************************************************************************
- * *
- * Global functions and variables unsed and undocumented *
- * *
- *************************************************************************/
-
-/* kill.c */
-extern int rl_set_retained_kills PARAMS((int));
-
-/* terminal.c */
-extern void _rl_set_screen_size PARAMS((int, int));
-
-/* undo.c */
-extern int _rl_fix_last_undo_of_type PARAMS((int, int, int));
-
-/* util.c */
-extern char *_rl_savestring PARAMS((const char *));
-
-/*************************************************************************
- * *
- * Functions and variables private to the readline library *
- * *
- *************************************************************************/
-
-/* NOTE: Functions and variables prefixed with `_rl_' are
- pseudo-global: they are global so they can be shared
- between files in the readline library, but are not intended
- to be visible to readline callers. */
-
-/*************************************************************************
- * Undocumented private functions *
- *************************************************************************/
-
-#if defined(READLINE_CALLBACKS)
-
-/* readline.c */
-extern void readline_internal_setup PARAMS((void));
-extern char *readline_internal_teardown PARAMS((int));
-extern int readline_internal_char PARAMS((void));
-
-extern _rl_keyseq_cxt *_rl_keyseq_cxt_alloc PARAMS((void));
-extern void _rl_keyseq_cxt_dispose PARAMS((_rl_keyseq_cxt *));
-extern void _rl_keyseq_chain_dispose PARAMS((void));
-
-extern int _rl_dispatch_callback PARAMS((_rl_keyseq_cxt *));
-
-/* callback.c */
-extern _rl_callback_generic_arg *_rl_callback_data_alloc PARAMS((int));
-extern void _rl_callback_data_dispose PARAMS((_rl_callback_generic_arg *));
-
-#endif /* READLINE_CALLBACKS */
-
-/* bind.c */
-
-/* complete.c */
-extern void _rl_reset_completion_state PARAMS((void));
-extern char _rl_find_completion_word PARAMS((int *, int *));
-extern void _rl_free_match_list PARAMS((char **));
-
-/* display.c */
-extern char *_rl_strip_prompt PARAMS((char *));
-extern void _rl_move_cursor_relative PARAMS((int, const char *));
-extern void _rl_move_vert PARAMS((int));
-extern void _rl_save_prompt PARAMS((void));
-extern void _rl_restore_prompt PARAMS((void));
-extern char *_rl_make_prompt_for_search PARAMS((int));
-extern void _rl_erase_at_end_of_line PARAMS((int));
-extern void _rl_clear_to_eol PARAMS((int));
-extern void _rl_clear_screen PARAMS((void));
-extern void _rl_update_final PARAMS((void));
-extern void _rl_redisplay_after_sigwinch PARAMS((void));
-extern void _rl_clean_up_for_exit PARAMS((void));
-extern void _rl_erase_entire_line PARAMS((void));
-extern int _rl_current_display_line PARAMS((void));
-
-/* input.c */
-extern int _rl_any_typein PARAMS((void));
-extern int _rl_input_available PARAMS((void));
-extern int _rl_input_queued PARAMS((int));
-extern void _rl_insert_typein PARAMS((int));
-extern int _rl_unget_char PARAMS((int));
-extern int _rl_pushed_input_available PARAMS((void));
-
-/* isearch.c */
-extern _rl_search_cxt *_rl_scxt_alloc PARAMS((int, int));
-extern void _rl_scxt_dispose PARAMS((_rl_search_cxt *, int));
-
-extern int _rl_isearch_dispatch PARAMS((_rl_search_cxt *, int));
-extern int _rl_isearch_callback PARAMS((_rl_search_cxt *));
-
-extern int _rl_search_getchar PARAMS((_rl_search_cxt *));
-
-/* macro.c */
-extern void _rl_with_macro_input PARAMS((char *));
-extern int _rl_next_macro_key PARAMS((void));
-extern void _rl_push_executing_macro PARAMS((void));
-extern void _rl_pop_executing_macro PARAMS((void));
-extern void _rl_add_macro_char PARAMS((int));
-extern void _rl_kill_kbd_macro PARAMS((void));
-
-/* misc.c */
-extern int _rl_arg_overflow PARAMS((void));
-extern void _rl_arg_init PARAMS((void));
-extern int _rl_arg_getchar PARAMS((void));
-extern int _rl_arg_callback PARAMS((_rl_arg_cxt));
-extern void _rl_reset_argument PARAMS((void));
-
-extern void _rl_start_using_history PARAMS((void));
-extern int _rl_free_saved_history_line PARAMS((void));
-extern void _rl_set_insert_mode PARAMS((int, int));
-
-extern void _rl_revert_all_lines PARAMS((void));
-
-/* nls.c */
-extern int _rl_init_eightbit PARAMS((void));
-
-/* parens.c */
-extern void _rl_enable_paren_matching PARAMS((int));
-
-/* readline.c */
-extern void _rl_init_line_state PARAMS((void));
-extern void _rl_set_the_line PARAMS((void));
-extern int _rl_dispatch PARAMS((int, Keymap));
-extern int _rl_dispatch_subseq PARAMS((int, Keymap, int));
-extern void _rl_internal_char_cleanup PARAMS((void));
-
-/* rltty.c */
-extern int _rl_disable_tty_signals PARAMS((void));
-extern int _rl_restore_tty_signals PARAMS((void));
-
-/* search.c */
-extern int _rl_nsearch_callback PARAMS((_rl_search_cxt *));
-
-/* signals.c */
-extern void _rl_signal_handler PARAMS((int));
-
-extern void _rl_block_sigint PARAMS((void));
-extern void _rl_release_sigint PARAMS((void));
-extern void _rl_block_sigwinch PARAMS((void));
-extern void _rl_release_sigwinch PARAMS((void));
-
-/* terminal.c */
-extern void _rl_get_screen_size PARAMS((int, int));
-e
-extern int _rl_init_terminal_io PARAMS((const char *));
-#ifdef _MINIX
-extern void _rl_output_character_function PARAMS((int));
-#else
-extern int _rl_output_character_function PARAMS((int));
-#endif
-extern void _rl_output_some_chars PARAMS((const char *, int));
-extern int _rl_backspace PARAMS((int));
-extern void _rl_enable_meta_key PARAMS((void));
-extern void _rl_control_keypad PARAMS((int));
-extern void _rl_set_cursor PARAMS((int, int));
-
-/* text.c */
-extern void _rl_fix_point PARAMS((int));
-extern int _rl_replace_text PARAMS((const char *, int, int));
-extern int _rl_forward_char_internal PARAMS((int));
-extern int _rl_insert_char PARAMS((int, int));
-extern int _rl_overwrite_char PARAMS((int, int));
-extern int _rl_overwrite_rubout PARAMS((int, int));
-extern int _rl_rubout_char PARAMS((int, int));
-#if defined (HANDLE_MULTIBYTE)
-extern int _rl_char_search_internal PARAMS((int, int, char *, int));
-#else
-extern int _rl_char_search_internal PARAMS((int, int, int));
-#endif
-extern int _rl_set_mark_at_pos PARAMS((int));
-
-/* undo.c */
-extern UNDO_LIST *_rl_copy_undo_entry PARAMS((UNDO_LIST *));
-extern UNDO_LIST *_rl_copy_undo_list PARAMS((UNDO_LIST *));
-
-/* util.c */
-#if defined (USE_VARARGS) && defined (PREFER_STDARG)
-extern void _rl_ttymsg (const char *, ...) __attribute__((__format__ (printf, 1, 2)));
-extern void _rl_errmsg (const char *, ...) __attribute__((__format__ (printf, 1, 2)));
-extern void _rl_trace (const char *, ...) __attribute__((__format__ (printf, 1, 2)));
-#else
-extern void _rl_ttymsg ();
-extern void _rl_errmsg ();
-extern void _rl_trace ();
-#endif
-
-extern int _rl_tropen PARAMS((void));
-
-extern int _rl_abort_internal PARAMS((void));
-extern int _rl_null_function PARAMS((int, int));
-extern char *_rl_strindex PARAMS((const char *, const char *));
-extern int _rl_qsort_string_compare PARAMS((char **, char **));
-extern int (_rl_uppercase_p) PARAMS((int));
-extern int (_rl_lowercase_p) PARAMS((int));
-extern int (_rl_pure_alphabetic) PARAMS((int));
-extern int (_rl_digit_p) PARAMS((int));
-extern int (_rl_to_lower) PARAMS((int));
-extern int (_rl_to_upper) PARAMS((int));
-extern int (_rl_digit_value) PARAMS((int));
-
-/* vi_mode.c */
-extern void _rl_vi_initialize_line PARAMS((void));
-extern void _rl_vi_reset_last PARAMS((void));
-extern void _rl_vi_set_last PARAMS((int, int, int));
-extern int _rl_vi_textmod_command PARAMS((int));
-extern void _rl_vi_done_inserting PARAMS((void));
-extern int _rl_vi_domove_callback PARAMS((_rl_vimotion_cxt *));
-
-/*************************************************************************
- * Undocumented private variables *
- *************************************************************************/
-
-/* bind.c */
-extern const char * const _rl_possible_control_prefixes[];
-extern const char * const _rl_possible_meta_prefixes[];
-
-/* callback.c */
-extern _rl_callback_func_t *_rl_callback_func;
-extern _rl_callback_generic_arg *_rl_callback_data;
-
-/* complete.c */
-extern int _rl_complete_show_all;
-extern int _rl_complete_show_unmodified;
-extern int _rl_complete_mark_directories;
-extern int _rl_complete_mark_symlink_dirs;
-extern int _rl_completion_prefix_display_length;
-extern int _rl_completion_columns;
-extern int _rl_print_completions_horizontally;
-extern int _rl_completion_case_fold;
-extern int _rl_completion_case_map;
-extern int _rl_match_hidden_files;
-extern int _rl_page_completions;
-extern int _rl_skip_completed_text;
-extern int _rl_menu_complete_prefix_first;
-
-/* display.c */
-extern int _rl_vis_botlin;
-extern int _rl_last_c_pos;
-extern int _rl_suppress_redisplay;
-extern int _rl_want_redisplay;
-
-/* isearch.c */
-extern char *_rl_isearch_terminators;
-
-extern _rl_search_cxt *_rl_iscxt;
-
-/* macro.c */
-extern char *_rl_executing_macro;
-
-/* misc.c */
-extern int _rl_history_preserve_point;
-extern int _rl_history_saved_point;
-
-extern _rl_arg_cxt _rl_argcxt;
-
-/* readline.c */
-extern int _rl_echoing_p;
-extern int _rl_horizontal_scroll_mode;
-extern int _rl_mark_modified_lines;
-extern int _rl_bell_preference;
-extern int _rl_meta_flag;
-extern int _rl_convert_meta_chars_to_ascii;
-extern int _rl_output_meta_chars;
-extern int _rl_bind_stty_chars;
-extern int _rl_revert_all_at_newline;
-extern int _rl_echo_control_chars;
-extern char *_rl_comment_begin;
-extern unsigned char _rl_parsing_conditionalized_out;
-extern Keymap _rl_keymap;
-extern FILE *_rl_in_stream;
-extern FILE *_rl_out_stream;
-extern int _rl_last_command_was_kill;
-extern int _rl_eof_char;
-extern procenv_t _rl_top_level;
-extern _rl_keyseq_cxt *_rl_kscxt;
-
-/* search.c */
-extern _rl_search_cxt *_rl_nscxt;
-
-/* signals.c */
-extern int _rl_interrupt_immediately;
-extern int volatile _rl_caught_signal;
-
-extern int _rl_echoctl;
-
-extern int _rl_intr_char;
-extern int _rl_quit_char;
-extern int _rl_susp_char;
-
-/* terminal.c */
-extern int _rl_enable_keypad;
-extern int _rl_enable_meta;
-extern char *_rl_term_clreol;
-extern char *_rl_term_clrpag;
-extern char *_rl_term_im;
-extern char *_rl_term_ic;
-extern char *_rl_term_ei;
-extern char *_rl_term_DC;
-extern char *_rl_term_up;
-extern char *_rl_term_dc;
-extern char *_rl_term_cr;
-extern char *_rl_term_IC;
-extern char *_rl_term_forward_char;
-extern int _rl_screenheight;
-extern int _rl_screenwidth;
-extern int _rl_screenchars;
-extern int _rl_terminal_can_insert;
-extern int _rl_term_autowrap;
-
-/* undo.c */
-extern int _rl_doing_an_undo;
-extern int _rl_undo_group_level;
-
-/* vi_mode.c */
-extern int _rl_vi_last_command;
-extern _rl_vimotion_cxt *_rl_vimvcxt;
-
-#endif /* _RL_PRIVATE_H_ */
+++ /dev/null
-/* bind.c -- key binding and startup file support for the readline library. */
-
-/* Copyright (C) 1987-2010 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (__TANDEM)
-# include <floss.h>
-#endif
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#if defined (HAVE_SYS_FILE_H)
-# include <sys/file.h>
-#endif /* HAVE_SYS_FILE_H */
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif /* HAVE_STDLIB_H */
-
-#include <errno.h>
-
-#if !defined (errno)
-extern int errno;
-#endif /* !errno */
-
-#include "posixstat.h"
-
-/* System-specific feature definitions and include files. */
-#include "rldefs.h"
-
-/* Some standard library routines. */
-#include "readline.h"
-#include "history.h"
-
-#include "rlprivate.h"
-#include "rlshell.h"
-#include "xmalloc.h"
-
-#if !defined (strchr) && !defined (__STDC__)
-extern char *strchr (), *strrchr ();
-#endif /* !strchr && !__STDC__ */
-
-/* Variables exported by this file. */
-Keymap rl_binding_keymap;
-
-static int _rl_skip_to_delim PARAMS((char *, int, int));
-
-static char *_rl_read_file PARAMS((char *, size_t *));
-static void _rl_init_file_error PARAMS((const char *));
-static int _rl_read_init_file PARAMS((const char *, int));
-static int glean_key_from_name PARAMS((char *));
-
-static int find_boolean_var PARAMS((const char *));
-static int find_string_var PARAMS((const char *));
-
-static char *_rl_get_string_variable_value PARAMS((const char *));
-static int substring_member_of_array PARAMS((const char *, const char * const *));
-
-static int currently_reading_init_file;
-
-/* used only in this file */
-static int _rl_prefer_visible_bell = 1;
-
-/* **************************************************************** */
-/* */
-/* Binding keys */
-/* */
-/* **************************************************************** */
-
-/* rl_add_defun (char *name, rl_command_func_t *function, int key)
- Add NAME to the list of named functions. Make FUNCTION be the function
- that gets called. If KEY is not -1, then bind it. */
-int
-rl_add_defun (name, function, key)
- const char *name;
- rl_command_func_t *function;
- int key;
-{
- if (key != -1)
- rl_bind_key (key, function);
- rl_add_funmap_entry (name, function);
- return 0;
-}
-
-/* Bind KEY to FUNCTION. Returns non-zero if KEY is out of range. */
-int
-rl_bind_key (key, function)
- int key;
- rl_command_func_t *function;
-{
- if (key < 0)
- return (key);
-
- if (META_CHAR (key) && _rl_convert_meta_chars_to_ascii)
- {
- if (_rl_keymap[ESC].type == ISKMAP)
- {
- Keymap escmap;
-
- escmap = FUNCTION_TO_KEYMAP (_rl_keymap, ESC);
- key = UNMETA (key);
- escmap[key].type = ISFUNC;
- escmap[key].function = function;
- return (0);
- }
- return (key);
- }
-
- _rl_keymap[key].type = ISFUNC;
- _rl_keymap[key].function = function;
- rl_binding_keymap = _rl_keymap;
- return (0);
-}
-
-/* Bind KEY to FUNCTION in MAP. Returns non-zero in case of invalid
- KEY. */
-int
-rl_bind_key_in_map (key, function, map)
- int key;
- rl_command_func_t *function;
- Keymap map;
-{
- int result;
- Keymap oldmap;
-
- oldmap = _rl_keymap;
- _rl_keymap = map;
- result = rl_bind_key (key, function);
- _rl_keymap = oldmap;
- return (result);
-}
-
-/* Bind key sequence KEYSEQ to DEFAULT_FUNC if KEYSEQ is unbound. Right
- now, this is always used to attempt to bind the arrow keys, hence the
- check for rl_vi_movement_mode. */
-int
-rl_bind_key_if_unbound_in_map (key, default_func, kmap)
- int key;
- rl_command_func_t *default_func;
- Keymap kmap;
-{
- char keyseq[2];
-
- keyseq[0] = (unsigned char)key;
- keyseq[1] = '\0';
- return (rl_bind_keyseq_if_unbound_in_map (keyseq, default_func, kmap));
-}
-
-int
-rl_bind_key_if_unbound (key, default_func)
- int key;
- rl_command_func_t *default_func;
-{
- char keyseq[2];
-
- keyseq[0] = (unsigned char)key;
- keyseq[1] = '\0';
- return (rl_bind_keyseq_if_unbound_in_map (keyseq, default_func, _rl_keymap));
-}
-
-/* Make KEY do nothing in the currently selected keymap.
- Returns non-zero in case of error. */
-int
-rl_unbind_key (key)
- int key;
-{
- return (rl_bind_key (key, (rl_command_func_t *)NULL));
-}
-
-/* Make KEY do nothing in MAP.
- Returns non-zero in case of error. */
-int
-rl_unbind_key_in_map (key, map)
- int key;
- Keymap map;
-{
- return (rl_bind_key_in_map (key, (rl_command_func_t *)NULL, map));
-}
-
-/* Unbind all keys bound to FUNCTION in MAP. */
-int
-rl_unbind_function_in_map (func, map)
- rl_command_func_t *func;
- Keymap map;
-{
- register int i, rval;
-
- for (i = rval = 0; i < KEYMAP_SIZE; i++)
- {
- if (map[i].type == ISFUNC && map[i].function == func)
- {
- map[i].function = (rl_command_func_t *)NULL;
- rval = 1;
- }
- }
- return rval;
-}
-
-int
-rl_unbind_command_in_map (command, map)
- const char *command;
- Keymap map;
-{
- rl_command_func_t *func;
-
- func = rl_named_function (command);
- if (func == 0)
- return 0;
- return (rl_unbind_function_in_map (func, map));
-}
-
-/* Bind the key sequence represented by the string KEYSEQ to
- FUNCTION, starting in the current keymap. This makes new
- keymaps as necessary. */
-int
-rl_bind_keyseq (keyseq, function)
- const char *keyseq;
- rl_command_func_t *function;
-{
- return (rl_generic_bind (ISFUNC, keyseq, (char *)function, _rl_keymap));
-}
-
-/* Bind the key sequence represented by the string KEYSEQ to
- FUNCTION. This makes new keymaps as necessary. The initial
- place to do bindings is in MAP. */
-int
-rl_bind_keyseq_in_map (keyseq, function, map)
- const char *keyseq;
- rl_command_func_t *function;
- Keymap map;
-{
- return (rl_generic_bind (ISFUNC, keyseq, (char *)function, map));
-}
-
-/* Backwards compatibility; equivalent to rl_bind_keyseq_in_map() */
-int
-rl_set_key (keyseq, function, map)
- const char *keyseq;
- rl_command_func_t *function;
- Keymap map;
-{
- return (rl_generic_bind (ISFUNC, keyseq, (char *)function, map));
-}
-
-/* Bind key sequence KEYSEQ to DEFAULT_FUNC if KEYSEQ is unbound. Right
- now, this is always used to attempt to bind the arrow keys, hence the
- check for rl_vi_movement_mode. */
-int
-rl_bind_keyseq_if_unbound_in_map (keyseq, default_func, kmap)
- const char *keyseq;
- rl_command_func_t *default_func;
- Keymap kmap;
-{
- rl_command_func_t *func;
-
- if (keyseq)
- {
- func = rl_function_of_keyseq (keyseq, kmap, (int *)NULL);
-#if defined (VI_MODE)
- if (!func || func == rl_do_lowercase_version || func == rl_vi_movement_mode)
-#else
- if (!func || func == rl_do_lowercase_version)
-#endif
- return (rl_bind_keyseq_in_map (keyseq, default_func, kmap));
- else
- return 1;
- }
- return 0;
-}
-
-int
-rl_bind_keyseq_if_unbound (keyseq, default_func)
- const char *keyseq;
- rl_command_func_t *default_func;
-{
- return (rl_bind_keyseq_if_unbound_in_map (keyseq, default_func, _rl_keymap));
-}
-
-/* Bind the key sequence represented by the string KEYSEQ to
- the string of characters MACRO. This makes new keymaps as
- necessary. The initial place to do bindings is in MAP. */
-int
-rl_macro_bind (keyseq, macro, map)
- const char *keyseq, *macro;
- Keymap map;
-{
- char *macro_keys;
- int macro_keys_len;
-
- macro_keys = (char *)xmalloc ((2 * strlen (macro)) + 1);
-
- if (rl_translate_keyseq (macro, macro_keys, ¯o_keys_len))
- {
- xfree (macro_keys);
- return -1;
- }
- rl_generic_bind (ISMACR, keyseq, macro_keys, map);
- return 0;
-}
-
-/* Bind the key sequence represented by the string KEYSEQ to
- the arbitrary pointer DATA. TYPE says what kind of data is
- pointed to by DATA, right now this can be a function (ISFUNC),
- a macro (ISMACR), or a keymap (ISKMAP). This makes new keymaps
- as necessary. The initial place to do bindings is in MAP. */
-int
-rl_generic_bind (type, keyseq, data, map)
- int type;
- const char *keyseq;
- char *data;
- Keymap map;
-{
- char *keys;
- int keys_len;
- register int i;
- KEYMAP_ENTRY k;
-
- k.function = 0;
-
- /* If no keys to bind to, exit right away. */
- if (keyseq == 0 || *keyseq == 0)
- {
- if (type == ISMACR)
- xfree (data);
- return -1;
- }
-
- keys = (char *)xmalloc (1 + (2 * strlen (keyseq)));
-
- /* Translate the ASCII representation of KEYSEQ into an array of
- characters. Stuff the characters into KEYS, and the length of
- KEYS into KEYS_LEN. */
- if (rl_translate_keyseq (keyseq, keys, &keys_len))
- {
- xfree (keys);
- return -1;
- }
-
- /* Bind keys, making new keymaps as necessary. */
- for (i = 0; i < keys_len; i++)
- {
- unsigned char uc = keys[i];
- int ic;
-
- ic = uc;
- if (ic < 0 || ic >= KEYMAP_SIZE)
- {
- xfree (keys);
- return -1;
- }
-
- if (META_CHAR (ic) && _rl_convert_meta_chars_to_ascii)
- {
- ic = UNMETA (ic);
- if (map[ESC].type == ISKMAP)
- map = FUNCTION_TO_KEYMAP (map, ESC);
- }
-
- if ((i + 1) < keys_len)
- {
- if (map[ic].type != ISKMAP)
- {
- /* We allow subsequences of keys. If a keymap is being
- created that will `shadow' an existing function or macro
- key binding, we save that keybinding into the ANYOTHERKEY
- index in the new map. The dispatch code will look there
- to find the function to execute if the subsequence is not
- matched. ANYOTHERKEY was chosen to be greater than
- UCHAR_MAX. */
- k = map[ic];
-
- map[ic].type = ISKMAP;
- map[ic].function = KEYMAP_TO_FUNCTION (rl_make_bare_keymap());
- }
- map = FUNCTION_TO_KEYMAP (map, ic);
- /* The dispatch code will return this function if no matching
- key sequence is found in the keymap. This (with a little
- help from the dispatch code in readline.c) allows `a' to be
- mapped to something, `abc' to be mapped to something else,
- and the function bound to `a' to be executed when the user
- types `abx', leaving `bx' in the input queue. */
- if (k.function && ((k.type == ISFUNC && k.function != rl_do_lowercase_version) || k.type == ISMACR))
- {
- map[ANYOTHERKEY] = k;
- k.function = 0;
- }
- }
- else
- {
- if (map[ic].type == ISMACR)
- xfree ((char *)map[ic].function);
- else if (map[ic].type == ISKMAP)
- {
- map = FUNCTION_TO_KEYMAP (map, ic);
- ic = ANYOTHERKEY;
- /* If we're trying to override a keymap with a null function
- (e.g., trying to unbind it), we can't use a null pointer
- here because that's indistinguishable from having not been
- overridden. We use a special bindable function that does
- nothing. */
- if (type == ISFUNC && data == 0)
- data = (char *)_rl_null_function;
- }
-
- map[ic].function = KEYMAP_TO_FUNCTION (data);
- map[ic].type = type;
- }
-
- rl_binding_keymap = map;
- }
- xfree (keys);
- return 0;
-}
-
-/* Translate the ASCII representation of SEQ, stuffing the values into ARRAY,
- an array of characters. LEN gets the final length of ARRAY. Return
- non-zero if there was an error parsing SEQ. */
-int
-rl_translate_keyseq (seq, array, len)
- const char *seq;
- char *array;
- int *len;
-{
- register int i, c, l, temp;
-
- for (i = l = 0; c = seq[i]; i++)
- {
- if (c == '\\')
- {
- c = seq[++i];
-
- if (c == 0)
- break;
-
- /* Handle \C- and \M- prefixes. */
- if ((c == 'C' || c == 'M') && seq[i + 1] == '-')
- {
- /* Handle special case of backwards define. */
- if (strncmp (&seq[i], "C-\\M-", 5) == 0)
- {
- array[l++] = ESC; /* ESC is meta-prefix */
- i += 5;
- array[l++] = CTRL (_rl_to_upper (seq[i]));
- if (seq[i] == '\0')
- i--;
- }
- else if (c == 'M')
- {
- i++; /* seq[i] == '-' */
- /* XXX - obey convert-meta setting */
- if (_rl_convert_meta_chars_to_ascii && _rl_keymap[ESC].type == ISKMAP)
- array[l++] = ESC; /* ESC is meta-prefix */
- else if (seq[i+1] == '\\' && seq[i+2] == 'C' && seq[i+3] == '-')
- {
- i += 4;
- temp = (seq[i] == '?') ? RUBOUT : CTRL (_rl_to_upper (seq[i]));
- array[l++] = META (temp);
- }
- else
- {
- /* This doesn't yet handle things like \M-\a, which may
- or may not have any reasonable meaning. You're
- probably better off using straight octal or hex. */
- i++;
- array[l++] = META (seq[i]);
- }
- }
- else if (c == 'C')
- {
- i += 2;
- /* Special hack for C-?... */
- array[l++] = (seq[i] == '?') ? RUBOUT : CTRL (_rl_to_upper (seq[i]));
- }
- continue;
- }
-
- /* Translate other backslash-escaped characters. These are the
- same escape sequences that bash's `echo' and `printf' builtins
- handle, with the addition of \d -> RUBOUT. A backslash
- preceding a character that is not special is stripped. */
- switch (c)
- {
- case 'a':
- array[l++] = '\007';
- break;
- case 'b':
- array[l++] = '\b';
- break;
- case 'd':
- array[l++] = RUBOUT; /* readline-specific */
- break;
- case 'e':
- array[l++] = ESC;
- break;
- case 'f':
- array[l++] = '\f';
- break;
- case 'n':
- array[l++] = NEWLINE;
- break;
- case 'r':
- array[l++] = RETURN;
- break;
- case 't':
- array[l++] = TAB;
- break;
- case 'v':
- array[l++] = 0x0B;
- break;
- case '\\':
- array[l++] = '\\';
- break;
- case '0': case '1': case '2': case '3':
- case '4': case '5': case '6': case '7':
- i++;
- for (temp = 2, c -= '0'; ISOCTAL (seq[i]) && temp--; i++)
- c = (c * 8) + OCTVALUE (seq[i]);
- i--; /* auto-increment in for loop */
- array[l++] = c & largest_char;
- break;
- case 'x':
- i++;
- for (temp = 2, c = 0; ISXDIGIT ((unsigned char)seq[i]) && temp--; i++)
- c = (c * 16) + HEXVALUE (seq[i]);
- if (temp == 2)
- c = 'x';
- i--; /* auto-increment in for loop */
- array[l++] = c & largest_char;
- break;
- default: /* backslashes before non-special chars just add the char */
- array[l++] = c;
- break; /* the backslash is stripped */
- }
- continue;
- }
-
- array[l++] = c;
- }
-
- *len = l;
- array[l] = '\0';
- return (0);
-}
-
-char *
-rl_untranslate_keyseq (seq)
- int seq;
-{
- static char kseq[16];
- int i, c;
-
- i = 0;
- c = seq;
- if (META_CHAR (c))
- {
- kseq[i++] = '\\';
- kseq[i++] = 'M';
- kseq[i++] = '-';
- c = UNMETA (c);
- }
- else if (c == ESC)
- {
- kseq[i++] = '\\';
- c = 'e';
- }
- else if (CTRL_CHAR (c))
- {
- kseq[i++] = '\\';
- kseq[i++] = 'C';
- kseq[i++] = '-';
- c = _rl_to_lower (UNCTRL (c));
- }
- else if (c == RUBOUT)
- {
- kseq[i++] = '\\';
- kseq[i++] = 'C';
- kseq[i++] = '-';
- c = '?';
- }
-
- if (c == ESC)
- {
- kseq[i++] = '\\';
- c = 'e';
- }
- else if (c == '\\' || c == '"')
- {
- kseq[i++] = '\\';
- }
-
- kseq[i++] = (unsigned char) c;
- kseq[i] = '\0';
- return kseq;
-}
-
-static char *
-_rl_untranslate_macro_value (seq)
- char *seq;
-{
- char *ret, *r, *s;
- int c;
-
- r = ret = (char *)xmalloc (7 * strlen (seq) + 1);
- for (s = seq; *s; s++)
- {
- c = *s;
- if (META_CHAR (c))
- {
- *r++ = '\\';
- *r++ = 'M';
- *r++ = '-';
- c = UNMETA (c);
- }
- else if (c == ESC)
- {
- *r++ = '\\';
- c = 'e';
- }
- else if (CTRL_CHAR (c))
- {
- *r++ = '\\';
- *r++ = 'C';
- *r++ = '-';
- c = _rl_to_lower (UNCTRL (c));
- }
- else if (c == RUBOUT)
- {
- *r++ = '\\';
- *r++ = 'C';
- *r++ = '-';
- c = '?';
- }
-
- if (c == ESC)
- {
- *r++ = '\\';
- c = 'e';
- }
- else if (c == '\\' || c == '"')
- *r++ = '\\';
-
- *r++ = (unsigned char)c;
- }
- *r = '\0';
- return ret;
-}
-
-/* Return a pointer to the function that STRING represents.
- If STRING doesn't have a matching function, then a NULL pointer
- is returned. */
-rl_command_func_t *
-rl_named_function (string)
- const char *string;
-{
- register int i;
-
- rl_initialize_funmap ();
-
- for (i = 0; funmap[i]; i++)
- if (_rl_stricmp (funmap[i]->name, string) == 0)
- return (funmap[i]->function);
- return ((rl_command_func_t *)NULL);
-}
-
-/* Return the function (or macro) definition which would be invoked via
- KEYSEQ if executed in MAP. If MAP is NULL, then the current keymap is
- used. TYPE, if non-NULL, is a pointer to an int which will receive the
- type of the object pointed to. One of ISFUNC (function), ISKMAP (keymap),
- or ISMACR (macro). */
-rl_command_func_t *
-rl_function_of_keyseq (keyseq, map, type)
- const char *keyseq;
- Keymap map;
- int *type;
-{
- register int i;
-
- if (map == 0)
- map = _rl_keymap;
-
- for (i = 0; keyseq && keyseq[i]; i++)
- {
- unsigned char ic = keyseq[i];
-
- if (META_CHAR (ic) && _rl_convert_meta_chars_to_ascii)
- {
- if (map[ESC].type == ISKMAP)
- {
- map = FUNCTION_TO_KEYMAP (map, ESC);
- ic = UNMETA (ic);
- }
- /* XXX - should we just return NULL here, since this obviously
- doesn't match? */
- else
- {
- if (type)
- *type = map[ESC].type;
-
- return (map[ESC].function);
- }
- }
-
- if (map[ic].type == ISKMAP)
- {
- /* If this is the last key in the key sequence, return the
- map. */
- if (keyseq[i + 1] == '\0')
- {
- if (type)
- *type = ISKMAP;
-
- return (map[ic].function);
- }
- else
- map = FUNCTION_TO_KEYMAP (map, ic);
- }
- /* If we're not at the end of the key sequence, and the current key
- is bound to something other than a keymap, then the entire key
- sequence is not bound. */
- else if (map[ic].type != ISKMAP && keyseq[i+1])
- return ((rl_command_func_t *)NULL);
- else /* map[ic].type != ISKMAP && keyseq[i+1] == 0 */
- {
- if (type)
- *type = map[ic].type;
-
- return (map[ic].function);
- }
- }
- return ((rl_command_func_t *) NULL);
-}
-
-/* The last key bindings file read. */
-static char *last_readline_init_file = (char *)NULL;
-
-/* The file we're currently reading key bindings from. */
-static const char *current_readline_init_file;
-static int current_readline_init_include_level;
-static int current_readline_init_lineno;
-
-/* Read FILENAME into a locally-allocated buffer and return the buffer.
- The size of the buffer is returned in *SIZEP. Returns NULL if any
- errors were encountered. */
-static char *
-_rl_read_file (filename, sizep)
- char *filename;
- size_t *sizep;
-{
- struct stat finfo;
- size_t file_size;
- char *buffer;
- int i, file;
-
- if ((stat (filename, &finfo) < 0) || (file = open (filename, O_RDONLY, 0666)) < 0)
- return ((char *)NULL);
-
- file_size = (size_t)finfo.st_size;
-
- /* check for overflow on very large files */
- if (file_size != finfo.st_size || file_size + 1 < file_size)
- {
- if (file >= 0)
- close (file);
-#if defined (EFBIG)
- errno = EFBIG;
-#endif
- return ((char *)NULL);
- }
-
- /* Read the file into BUFFER. */
- buffer = (char *)xmalloc (file_size + 1);
- i = read (file, buffer, file_size);
- close (file);
-
- if (i < 0)
- {
- xfree (buffer);
- return ((char *)NULL);
- }
-
- RL_CHECK_SIGNALS ();
-
- buffer[i] = '\0';
- if (sizep)
- *sizep = i;
-
- return (buffer);
-}
-
-/* Re-read the current keybindings file. */
-int
-rl_re_read_init_file (count, ignore)
- int count, ignore;
-{
- int r;
- r = rl_read_init_file ((const char *)NULL);
- rl_set_keymap_from_edit_mode ();
- return r;
-}
-
-/* Do key bindings from a file. If FILENAME is NULL it defaults
- to the first non-null filename from this list:
- 1. the filename used for the previous call
- 2. the value of the shell variable `INPUTRC'
- 3. ~/.inputrc
- 4. /etc/inputrc
- If the file existed and could be opened and read, 0 is returned,
- otherwise errno is returned. */
-int
-rl_read_init_file (filename)
- const char *filename;
-{
- /* Default the filename. */
- if (filename == 0)
- filename = last_readline_init_file;
- if (filename == 0)
- filename = sh_get_env_value ("INPUTRC");
- if (filename == 0 || *filename == 0)
- {
- filename = DEFAULT_INPUTRC;
- /* Try to read DEFAULT_INPUTRC; fall back to SYS_INPUTRC on failure */
- if (_rl_read_init_file (filename, 0) == 0)
- return 0;
- filename = SYS_INPUTRC;
- }
-
-#if defined (__MSDOS__)
- if (_rl_read_init_file (filename, 0) == 0)
- return 0;
- filename = "~/_inputrc";
-#endif
- return (_rl_read_init_file (filename, 0));
-}
-
-static int
-_rl_read_init_file (filename, include_level)
- const char *filename;
- int include_level;
-{
- register int i;
- char *buffer, *openname, *line, *end;
- size_t file_size;
-
- current_readline_init_file = filename;
- current_readline_init_include_level = include_level;
-
- openname = tilde_expand (filename);
- buffer = _rl_read_file (openname, &file_size);
- xfree (openname);
-
- RL_CHECK_SIGNALS ();
- if (buffer == 0)
- return (errno);
-
- if (include_level == 0 && filename != last_readline_init_file)
- {
- FREE (last_readline_init_file);
- last_readline_init_file = savestring (filename);
- }
-
- currently_reading_init_file = 1;
-
- /* Loop over the lines in the file. Lines that start with `#' are
- comments; all other lines are commands for readline initialization. */
- current_readline_init_lineno = 1;
- line = buffer;
- end = buffer + file_size;
- while (line < end)
- {
- /* Find the end of this line. */
- for (i = 0; line + i != end && line[i] != '\n'; i++);
-
-#if defined (__CYGWIN__)
- /* ``Be liberal in what you accept.'' */
- if (line[i] == '\n' && line[i-1] == '\r')
- line[i - 1] = '\0';
-#endif
-
- /* Mark end of line. */
- line[i] = '\0';
-
- /* Skip leading whitespace. */
- while (*line && whitespace (*line))
- {
- line++;
- i--;
- }
-
- /* If the line is not a comment, then parse it. */
- if (*line && *line != '#')
- rl_parse_and_bind (line);
-
- /* Move to the next line. */
- line += i + 1;
- current_readline_init_lineno++;
- }
-
- xfree (buffer);
- currently_reading_init_file = 0;
- return (0);
-}
-
-static void
-_rl_init_file_error (msg)
- const char *msg;
-{
- if (currently_reading_init_file)
- _rl_errmsg ("%s: line %d: %s\n", current_readline_init_file,
- current_readline_init_lineno, msg);
- else
- _rl_errmsg ("%s", msg);
-}
-
-/* **************************************************************** */
-/* */
-/* Parser Directives */
-/* */
-/* **************************************************************** */
-
-typedef int _rl_parser_func_t PARAMS((char *));
-
-/* Things that mean `Control'. */
-const char * const _rl_possible_control_prefixes[] = {
- "Control-", "C-", "CTRL-", (const char *)NULL
-};
-
-const char * const _rl_possible_meta_prefixes[] = {
- "Meta", "M-", (const char *)NULL
-};
-
-/* Conditionals. */
-
-/* Calling programs set this to have their argv[0]. */
-const char *rl_readline_name = "other";
-
-/* Stack of previous values of parsing_conditionalized_out. */
-static unsigned char *if_stack = (unsigned char *)NULL;
-static int if_stack_depth;
-static int if_stack_size;
-
-/* Push _rl_parsing_conditionalized_out, and set parser state based
- on ARGS. */
-static int
-parser_if (args)
- char *args;
-{
- register int i;
-
- /* Push parser state. */
- if (if_stack_depth + 1 >= if_stack_size)
- {
- if (!if_stack)
- if_stack = (unsigned char *)xmalloc (if_stack_size = 20);
- else
- if_stack = (unsigned char *)xrealloc (if_stack, if_stack_size += 20);
- }
- if_stack[if_stack_depth++] = _rl_parsing_conditionalized_out;
-
- /* If parsing is turned off, then nothing can turn it back on except
- for finding the matching endif. In that case, return right now. */
- if (_rl_parsing_conditionalized_out)
- return 0;
-
- /* Isolate first argument. */
- for (i = 0; args[i] && !whitespace (args[i]); i++);
-
- if (args[i])
- args[i++] = '\0';
-
- /* Handle "$if term=foo" and "$if mode=emacs" constructs. If this
- isn't term=foo, or mode=emacs, then check to see if the first
- word in ARGS is the same as the value stored in rl_readline_name. */
- if (rl_terminal_name && _rl_strnicmp (args, "term=", 5) == 0)
- {
- char *tem, *tname;
-
- /* Terminals like "aaa-60" are equivalent to "aaa". */
- tname = savestring (rl_terminal_name);
- tem = strchr (tname, '-');
- if (tem)
- *tem = '\0';
-
- /* Test the `long' and `short' forms of the terminal name so that
- if someone has a `sun-cmd' and does not want to have bindings
- that will be executed if the terminal is a `sun', they can put
- `$if term=sun-cmd' into their .inputrc. */
- _rl_parsing_conditionalized_out = _rl_stricmp (args + 5, tname) &&
- _rl_stricmp (args + 5, rl_terminal_name);
- xfree (tname);
- }
-#if defined (VI_MODE)
- else if (_rl_strnicmp (args, "mode=", 5) == 0)
- {
- int mode;
-
- if (_rl_stricmp (args + 5, "emacs") == 0)
- mode = emacs_mode;
- else if (_rl_stricmp (args + 5, "vi") == 0)
- mode = vi_mode;
- else
- mode = no_mode;
-
- _rl_parsing_conditionalized_out = mode != rl_editing_mode;
- }
-#endif /* VI_MODE */
- /* Check to see if the first word in ARGS is the same as the
- value stored in rl_readline_name. */
- else if (_rl_stricmp (args, rl_readline_name) == 0)
- _rl_parsing_conditionalized_out = 0;
- else
- _rl_parsing_conditionalized_out = 1;
- return 0;
-}
-
-/* Invert the current parser state if there is anything on the stack. */
-static int
-parser_else (args)
- char *args;
-{
- register int i;
-
- if (if_stack_depth == 0)
- {
- _rl_init_file_error ("$else found without matching $if");
- return 0;
- }
-
-#if 0
- /* Check the previous (n - 1) levels of the stack to make sure that
- we haven't previously turned off parsing. */
- for (i = 0; i < if_stack_depth - 1; i++)
-#else
- /* Check the previous (n) levels of the stack to make sure that
- we haven't previously turned off parsing. */
- for (i = 0; i < if_stack_depth; i++)
-#endif
- if (if_stack[i] == 1)
- return 0;
-
- /* Invert the state of parsing if at top level. */
- _rl_parsing_conditionalized_out = !_rl_parsing_conditionalized_out;
- return 0;
-}
-
-/* Terminate a conditional, popping the value of
- _rl_parsing_conditionalized_out from the stack. */
-static int
-parser_endif (args)
- char *args;
-{
- if (if_stack_depth)
- _rl_parsing_conditionalized_out = if_stack[--if_stack_depth];
- else
- _rl_init_file_error ("$endif without matching $if");
- return 0;
-}
-
-static int
-parser_include (args)
- char *args;
-{
- const char *old_init_file;
- char *e;
- int old_line_number, old_include_level, r;
-
- if (_rl_parsing_conditionalized_out)
- return (0);
-
- old_init_file = current_readline_init_file;
- old_line_number = current_readline_init_lineno;
- old_include_level = current_readline_init_include_level;
-
- e = strchr (args, '\n');
- if (e)
- *e = '\0';
- r = _rl_read_init_file ((const char *)args, old_include_level + 1);
-
- current_readline_init_file = old_init_file;
- current_readline_init_lineno = old_line_number;
- current_readline_init_include_level = old_include_level;
-
- return r;
-}
-
-/* Associate textual names with actual functions. */
-static const struct {
- const char * const name;
- _rl_parser_func_t *function;
-} parser_directives [] = {
- { "if", parser_if },
- { "endif", parser_endif },
- { "else", parser_else },
- { "include", parser_include },
- { (char *)0x0, (_rl_parser_func_t *)0x0 }
-};
-
-/* Handle a parser directive. STATEMENT is the line of the directive
- without any leading `$'. */
-static int
-handle_parser_directive (statement)
- char *statement;
-{
- register int i;
- char *directive, *args;
-
- /* Isolate the actual directive. */
-
- /* Skip whitespace. */
- for (i = 0; whitespace (statement[i]); i++);
-
- directive = &statement[i];
-
- for (; statement[i] && !whitespace (statement[i]); i++);
-
- if (statement[i])
- statement[i++] = '\0';
-
- for (; statement[i] && whitespace (statement[i]); i++);
-
- args = &statement[i];
-
- /* Lookup the command, and act on it. */
- for (i = 0; parser_directives[i].name; i++)
- if (_rl_stricmp (directive, parser_directives[i].name) == 0)
- {
- (*parser_directives[i].function) (args);
- return (0);
- }
-
- /* display an error message about the unknown parser directive */
- _rl_init_file_error ("unknown parser directive");
- return (1);
-}
-
-/* Start at STRING[START] and look for DELIM. Return I where STRING[I] ==
- DELIM or STRING[I] == 0. DELIM is usually a double quote. */
-static int
-_rl_skip_to_delim (string, start, delim)
- char *string;
- int start, delim;
-{
- int i, c, passc;
-
- for (i = start,passc = 0; c = string[i]; i++)
- {
- if (passc)
- {
- passc = 0;
- if (c == 0)
- break;
- continue;
- }
-
- if (c == '\\')
- {
- passc = 1;
- continue;
- }
-
- if (c == delim)
- break;
- }
-
- return i;
-}
-
-/* Read the binding command from STRING and perform it.
- A key binding command looks like: Keyname: function-name\0,
- a variable binding command looks like: set variable value.
- A new-style keybinding looks like "\C-x\C-x": exchange-point-and-mark. */
-int
-rl_parse_and_bind (string)
- char *string;
-{
- char *funname, *kname;
- register int c, i;
- int key, equivalency;
-
- while (string && whitespace (*string))
- string++;
-
- if (string == 0 || *string == 0 || *string == '#')
- return 0;
-
- /* If this is a parser directive, act on it. */
- if (*string == '$')
- {
- handle_parser_directive (&string[1]);
- return 0;
- }
-
- /* If we aren't supposed to be parsing right now, then we're done. */
- if (_rl_parsing_conditionalized_out)
- return 0;
-
- i = 0;
- /* If this keyname is a complex key expression surrounded by quotes,
- advance to after the matching close quote. This code allows the
- backslash to quote characters in the key expression. */
- if (*string == '"')
- {
- i = _rl_skip_to_delim (string, 1, '"');
-
- /* If we didn't find a closing quote, abort the line. */
- if (string[i] == '\0')
- {
- _rl_init_file_error ("no closing `\"' in key binding");
- return 1;
- }
- else
- i++; /* skip past closing double quote */
- }
-
- /* Advance to the colon (:) or whitespace which separates the two objects. */
- for (; (c = string[i]) && c != ':' && c != ' ' && c != '\t'; i++ );
-
- equivalency = (c == ':' && string[i + 1] == '=');
-
- /* Mark the end of the command (or keyname). */
- if (string[i])
- string[i++] = '\0';
-
- /* If doing assignment, skip the '=' sign as well. */
- if (equivalency)
- string[i++] = '\0';
-
- /* If this is a command to set a variable, then do that. */
- if (_rl_stricmp (string, "set") == 0)
- {
- char *var, *value, *e;
-
- var = string + i;
- /* Make VAR point to start of variable name. */
- while (*var && whitespace (*var)) var++;
-
- /* Make VALUE point to start of value string. */
- value = var;
- while (*value && whitespace (*value) == 0) value++;
- if (*value)
- *value++ = '\0';
- while (*value && whitespace (*value)) value++;
-
- /* Strip trailing whitespace from values of boolean variables. */
- if (find_boolean_var (var) >= 0)
- {
- /* remove trailing whitespace */
- e = value + strlen (value) - 1;
- while (e >= value && whitespace (*e))
- e--;
- e++; /* skip back to whitespace or EOS */
-
- if (*e && e >= value)
- *e = '\0';
- }
- else if ((i = find_string_var (var)) >= 0)
- {
- }
-
- rl_variable_bind (var, value);
- return 0;
- }
-
- /* Skip any whitespace between keyname and funname. */
- for (; string[i] && whitespace (string[i]); i++);
- funname = &string[i];
-
- /* Now isolate funname.
- For straight function names just look for whitespace, since
- that will signify the end of the string. But this could be a
- macro definition. In that case, the string is quoted, so skip
- to the matching delimiter. We allow the backslash to quote the
- delimiter characters in the macro body. */
- /* This code exists to allow whitespace in macro expansions, which
- would otherwise be gobbled up by the next `for' loop.*/
- /* XXX - it may be desirable to allow backslash quoting only if " is
- the quoted string delimiter, like the shell. */
- if (*funname == '\'' || *funname == '"')
- {
- int delimiter, passc;
-
- delimiter = string[i++];
- for (passc = 0; c = string[i]; i++)
- {
- if (passc)
- {
- passc = 0;
- continue;
- }
-
- if (c == '\\')
- {
- passc = 1;
- continue;
- }
-
- if (c == delimiter)
- break;
- }
- if (c)
- i++;
- }
-
- /* Advance to the end of the string. */
- for (; string[i] && !whitespace (string[i]); i++);
-
- /* No extra whitespace at the end of the string. */
- string[i] = '\0';
-
- /* Handle equivalency bindings here. Make the left-hand side be exactly
- whatever the right-hand evaluates to, including keymaps. */
- if (equivalency)
- {
- return 0;
- }
-
- /* If this is a new-style key-binding, then do the binding with
- rl_bind_keyseq (). Otherwise, let the older code deal with it. */
- if (*string == '"')
- {
- char *seq;
- register int j, k, passc;
-
- seq = (char *)xmalloc (1 + strlen (string));
- for (j = 1, k = passc = 0; string[j]; j++)
- {
- /* Allow backslash to quote characters, but leave them in place.
- This allows a string to end with a backslash quoting another
- backslash, or with a backslash quoting a double quote. The
- backslashes are left in place for rl_translate_keyseq (). */
- if (passc || (string[j] == '\\'))
- {
- seq[k++] = string[j];
- passc = !passc;
- continue;
- }
-
- if (string[j] == '"')
- break;
-
- seq[k++] = string[j];
- }
- seq[k] = '\0';
-
- /* Binding macro? */
- if (*funname == '\'' || *funname == '"')
- {
- j = strlen (funname);
-
- /* Remove the delimiting quotes from each end of FUNNAME. */
- if (j && funname[j - 1] == *funname)
- funname[j - 1] = '\0';
-
- rl_macro_bind (seq, &funname[1], _rl_keymap);
- }
- else
- rl_bind_keyseq (seq, rl_named_function (funname));
-
- xfree (seq);
- return 0;
- }
-
- /* Get the actual character we want to deal with. */
- kname = strrchr (string, '-');
- if (!kname)
- kname = string;
- else
- kname++;
-
- key = glean_key_from_name (kname);
-
- /* Add in control and meta bits. */
- if (substring_member_of_array (string, _rl_possible_control_prefixes))
- key = CTRL (_rl_to_upper (key));
-
- if (substring_member_of_array (string, _rl_possible_meta_prefixes))
- key = META (key);
-
- /* Temporary. Handle old-style keyname with macro-binding. */
- if (*funname == '\'' || *funname == '"')
- {
- char useq[2];
- int fl = strlen (funname);
-
- useq[0] = key; useq[1] = '\0';
- if (fl && funname[fl - 1] == *funname)
- funname[fl - 1] = '\0';
-
- rl_macro_bind (useq, &funname[1], _rl_keymap);
- }
-#if defined (PREFIX_META_HACK)
- /* Ugly, but working hack to keep prefix-meta around. */
- else if (_rl_stricmp (funname, "prefix-meta") == 0)
- {
- char seq[2];
-
- seq[0] = key;
- seq[1] = '\0';
- rl_generic_bind (ISKMAP, seq, (char *)emacs_meta_keymap, _rl_keymap);
- }
-#endif /* PREFIX_META_HACK */
- else
- rl_bind_key (key, rl_named_function (funname));
- return 0;
-}
-
-/* Simple structure for boolean readline variables (i.e., those that can
- have one of two values; either "On" or 1 for truth, or "Off" or 0 for
- false. */
-
-#define V_SPECIAL 0x1
-
-static const struct {
- const char * const name;
- int *value;
- int flags;
-} boolean_varlist [] = {
- { "bind-tty-special-chars", &_rl_bind_stty_chars, 0 },
- { "blink-matching-paren", &rl_blink_matching_paren, V_SPECIAL },
- { "byte-oriented", &rl_byte_oriented, 0 },
- { "completion-ignore-case", &_rl_completion_case_fold, 0 },
- { "completion-map-case", &_rl_completion_case_map, 0 },
- { "convert-meta", &_rl_convert_meta_chars_to_ascii, 0 },
- { "disable-completion", &rl_inhibit_completion, 0 },
- { "echo-control-characters", &_rl_echo_control_chars, 0 },
- { "enable-keypad", &_rl_enable_keypad, 0 },
- { "enable-meta-key", &_rl_enable_meta, 0 },
- { "expand-tilde", &rl_complete_with_tilde_expansion, 0 },
- { "history-preserve-point", &_rl_history_preserve_point, 0 },
- { "horizontal-scroll-mode", &_rl_horizontal_scroll_mode, 0 },
- { "input-meta", &_rl_meta_flag, 0 },
- { "mark-directories", &_rl_complete_mark_directories, 0 },
- { "mark-modified-lines", &_rl_mark_modified_lines, 0 },
- { "mark-symlinked-directories", &_rl_complete_mark_symlink_dirs, 0 },
- { "match-hidden-files", &_rl_match_hidden_files, 0 },
- { "menu-complete-display-prefix", &_rl_menu_complete_prefix_first, 0 },
- { "meta-flag", &_rl_meta_flag, 0 },
- { "output-meta", &_rl_output_meta_chars, 0 },
- { "page-completions", &_rl_page_completions, 0 },
- { "prefer-visible-bell", &_rl_prefer_visible_bell, V_SPECIAL },
- { "print-completions-horizontally", &_rl_print_completions_horizontally, 0 },
- { "revert-all-at-newline", &_rl_revert_all_at_newline, 0 },
- { "show-all-if-ambiguous", &_rl_complete_show_all, 0 },
- { "show-all-if-unmodified", &_rl_complete_show_unmodified, 0 },
- { "skip-completed-text", &_rl_skip_completed_text, 0 },
-#if defined (VISIBLE_STATS)
- { "visible-stats", &rl_visible_stats, 0 },
-#endif /* VISIBLE_STATS */
- { (char *)NULL, (int *)NULL, 0 }
-};
-
-static int
-find_boolean_var (name)
- const char *name;
-{
- register int i;
-
- for (i = 0; boolean_varlist[i].name; i++)
- if (_rl_stricmp (name, boolean_varlist[i].name) == 0)
- return i;
- return -1;
-}
-
-/* Hooks for handling special boolean variables, where a
- function needs to be called or another variable needs
- to be changed when they're changed. */
-static void
-hack_special_boolean_var (i)
- int i;
-{
- const char *name;
-
- name = boolean_varlist[i].name;
-
- if (_rl_stricmp (name, "blink-matching-paren") == 0)
- _rl_enable_paren_matching (rl_blink_matching_paren);
- else if (_rl_stricmp (name, "prefer-visible-bell") == 0)
- {
- if (_rl_prefer_visible_bell)
- _rl_bell_preference = VISIBLE_BELL;
- else
- _rl_bell_preference = AUDIBLE_BELL;
- }
-}
-
-typedef int _rl_sv_func_t PARAMS((const char *));
-
-/* These *must* correspond to the array indices for the appropriate
- string variable. (Though they're not used right now.) */
-#define V_BELLSTYLE 0
-#define V_COMBEGIN 1
-#define V_EDITMODE 2
-#define V_ISRCHTERM 3
-#define V_KEYMAP 4
-
-#define V_STRING 1
-#define V_INT 2
-
-/* Forward declarations */
-static int sv_bell_style PARAMS((const char *));
-static int sv_combegin PARAMS((const char *));
-static int sv_dispprefix PARAMS((const char *));
-static int sv_compquery PARAMS((const char *));
-static int sv_compwidth PARAMS((const char *));
-static int sv_editmode PARAMS((const char *));
-static int sv_histsize PARAMS((const char *));
-static int sv_isrchterm PARAMS((const char *));
-static int sv_keymap PARAMS((const char *));
-
-static const struct {
- const char * const name;
- int flags;
- _rl_sv_func_t *set_func;
-} string_varlist[] = {
- { "bell-style", V_STRING, sv_bell_style },
- { "comment-begin", V_STRING, sv_combegin },
- { "completion-display-width", V_INT, sv_compwidth },
- { "completion-prefix-display-length", V_INT, sv_dispprefix },
- { "completion-query-items", V_INT, sv_compquery },
- { "editing-mode", V_STRING, sv_editmode },
- { "history-size", V_INT, sv_histsize },
- { "isearch-terminators", V_STRING, sv_isrchterm },
- { "keymap", V_STRING, sv_keymap },
- { (char *)NULL, 0, (_rl_sv_func_t *)0 }
-};
-
-static int
-find_string_var (name)
- const char *name;
-{
- register int i;
-
- for (i = 0; string_varlist[i].name; i++)
- if (_rl_stricmp (name, string_varlist[i].name) == 0)
- return i;
- return -1;
-}
-
-/* A boolean value that can appear in a `set variable' command is true if
- the value is null or empty, `on' (case-insenstive), or "1". Any other
- values result in 0 (false). */
-static int
-bool_to_int (value)
- const char *value;
-{
- return (value == 0 || *value == '\0' ||
- (_rl_stricmp (value, "on") == 0) ||
- (value[0] == '1' && value[1] == '\0'));
-}
-
-char *
-rl_variable_value (name)
- const char *name;
-{
- register int i;
-
- /* Check for simple variables first. */
- i = find_boolean_var (name);
- if (i >= 0)
- return (*boolean_varlist[i].value ? "on" : "off");
-
- i = find_string_var (name);
- if (i >= 0)
- return (_rl_get_string_variable_value (string_varlist[i].name));
-
- /* Unknown variable names return NULL. */
- return 0;
-}
-
-int
-rl_variable_bind (name, value)
- const char *name, *value;
-{
- register int i;
- int v;
-
- /* Check for simple variables first. */
- i = find_boolean_var (name);
- if (i >= 0)
- {
- *boolean_varlist[i].value = bool_to_int (value);
- if (boolean_varlist[i].flags & V_SPECIAL)
- hack_special_boolean_var (i);
- return 0;
- }
-
- i = find_string_var (name);
-
- /* For the time being, unknown variable names or string names without a
- handler function are simply ignored. */
- if (i < 0 || string_varlist[i].set_func == 0)
- return 0;
-
- v = (*string_varlist[i].set_func) (value);
- return v;
-}
-
-static int
-sv_editmode (value)
- const char *value;
-{
- if (_rl_strnicmp (value, "vi", 2) == 0)
- {
-#if defined (VI_MODE)
- _rl_keymap = vi_insertion_keymap;
- rl_editing_mode = vi_mode;
-#endif /* VI_MODE */
- return 0;
- }
- else if (_rl_strnicmp (value, "emacs", 5) == 0)
- {
- _rl_keymap = emacs_standard_keymap;
- rl_editing_mode = emacs_mode;
- return 0;
- }
- return 1;
-}
-
-static int
-sv_combegin (value)
- const char *value;
-{
- if (value && *value)
- {
- FREE (_rl_comment_begin);
- _rl_comment_begin = savestring (value);
- return 0;
- }
- return 1;
-}
-
-static int
-sv_dispprefix (value)
- const char *value;
-{
- int nval = 0;
-
- if (value && *value)
- {
- nval = atoi (value);
- if (nval < 0)
- nval = 0;
- }
- _rl_completion_prefix_display_length = nval;
- return 0;
-}
-
-static int
-sv_compquery (value)
- const char *value;
-{
- int nval = 100;
-
- if (value && *value)
- {
- nval = atoi (value);
- if (nval < 0)
- nval = 0;
- }
- rl_completion_query_items = nval;
- return 0;
-}
-
-static int
-sv_compwidth (value)
- const char *value;
-{
- int nval = -1;
-
- if (value && *value)
- nval = atoi (value);
-
- _rl_completion_columns = nval;
- return 0;
-}
-
-static int
-sv_histsize (value)
- const char *value;
-{
- int nval = 500;
-
- if (value && *value)
- {
- nval = atoi (value);
- if (nval < 0)
- return 1;
- }
- stifle_history (nval);
- return 0;
-}
-
-static int
-sv_keymap (value)
- const char *value;
-{
- Keymap kmap;
-
- kmap = rl_get_keymap_by_name (value);
- if (kmap)
- {
- rl_set_keymap (kmap);
- return 0;
- }
- return 1;
-}
-
-static int
-sv_bell_style (value)
- const char *value;
-{
- if (value == 0 || *value == '\0')
- _rl_bell_preference = AUDIBLE_BELL;
- else if (_rl_stricmp (value, "none") == 0 || _rl_stricmp (value, "off") == 0)
- _rl_bell_preference = NO_BELL;
- else if (_rl_stricmp (value, "audible") == 0 || _rl_stricmp (value, "on") == 0)
- _rl_bell_preference = AUDIBLE_BELL;
- else if (_rl_stricmp (value, "visible") == 0)
- _rl_bell_preference = VISIBLE_BELL;
- else
- return 1;
- return 0;
-}
-
-static int
-sv_isrchterm (value)
- const char *value;
-{
- int beg, end, delim;
- char *v;
-
- if (value == 0)
- return 1;
-
- /* Isolate the value and translate it into a character string. */
- v = savestring (value);
- FREE (_rl_isearch_terminators);
- if (v[0] == '"' || v[0] == '\'')
- {
- delim = v[0];
- for (beg = end = 1; v[end] && v[end] != delim; end++)
- ;
- }
- else
- {
- for (beg = end = 0; whitespace (v[end]) == 0; end++)
- ;
- }
-
- v[end] = '\0';
-
- /* The value starts at v + beg. Translate it into a character string. */
- _rl_isearch_terminators = (char *)xmalloc (2 * strlen (v) + 1);
- rl_translate_keyseq (v + beg, _rl_isearch_terminators, &end);
- _rl_isearch_terminators[end] = '\0';
-
- xfree (v);
- return 0;
-}
-
-/* Return the character which matches NAME.
- For example, `Space' returns ' '. */
-
-typedef struct {
- const char * const name;
- int value;
-} assoc_list;
-
-static const assoc_list name_key_alist[] = {
- { "DEL", 0x7f },
- { "ESC", '\033' },
- { "Escape", '\033' },
- { "LFD", '\n' },
- { "Newline", '\n' },
- { "RET", '\r' },
- { "Return", '\r' },
- { "Rubout", 0x7f },
- { "SPC", ' ' },
- { "Space", ' ' },
- { "Tab", 0x09 },
- { (char *)0x0, 0 }
-};
-
-static int
-glean_key_from_name (name)
- char *name;
-{
- register int i;
-
- for (i = 0; name_key_alist[i].name; i++)
- if (_rl_stricmp (name, name_key_alist[i].name) == 0)
- return (name_key_alist[i].value);
-
- return (*(unsigned char *)name); /* XXX was return (*name) */
-}
-
-/* Auxiliary functions to manage keymaps. */
-static const struct {
- const char * const name;
- Keymap map;
-} keymap_names[] = {
- { "emacs", emacs_standard_keymap },
- { "emacs-standard", emacs_standard_keymap },
- { "emacs-meta", emacs_meta_keymap },
- { "emacs-ctlx", emacs_ctlx_keymap },
-#if defined (VI_MODE)
- { "vi", vi_movement_keymap },
- { "vi-move", vi_movement_keymap },
- { "vi-command", vi_movement_keymap },
- { "vi-insert", vi_insertion_keymap },
-#endif /* VI_MODE */
- { (char *)0x0, (Keymap)0x0 }
-};
-
-Keymap
-rl_get_keymap_by_name (name)
- const char *name;
-{
- register int i;
-
- for (i = 0; keymap_names[i].name; i++)
- if (_rl_stricmp (name, keymap_names[i].name) == 0)
- return (keymap_names[i].map);
- return ((Keymap) NULL);
-}
-
-char *
-rl_get_keymap_name (map)
- Keymap map;
-{
- register int i;
- for (i = 0; keymap_names[i].name; i++)
- if (map == keymap_names[i].map)
- return ((char *)keymap_names[i].name);
- return ((char *)NULL);
-}
-
-void
-rl_set_keymap (map)
- Keymap map;
-{
- if (map)
- _rl_keymap = map;
-}
-
-Keymap
-rl_get_keymap ()
-{
- return (_rl_keymap);
-}
-
-void
-rl_set_keymap_from_edit_mode ()
-{
- if (rl_editing_mode == emacs_mode)
- _rl_keymap = emacs_standard_keymap;
-#if defined (VI_MODE)
- else if (rl_editing_mode == vi_mode)
- _rl_keymap = vi_insertion_keymap;
-#endif /* VI_MODE */
-}
-
-char *
-rl_get_keymap_name_from_edit_mode ()
-{
- if (rl_editing_mode == emacs_mode)
- return "emacs";
-#if defined (VI_MODE)
- else if (rl_editing_mode == vi_mode)
- return "vi";
-#endif /* VI_MODE */
- else
- return "none";
-}
-
-/* **************************************************************** */
-/* */
-/* Key Binding and Function Information */
-/* */
-/* **************************************************************** */
-
-/* Each of the following functions produces information about the
- state of keybindings and functions known to Readline. The info
- is always printed to rl_outstream, and in such a way that it can
- be read back in (i.e., passed to rl_parse_and_bind ()). */
-
-/* Print the names of functions known to Readline. */
-void
-rl_list_funmap_names ()
-{
- register int i;
- const char **funmap_names;
-
- funmap_names = rl_funmap_names ();
-
- if (!funmap_names)
- return;
-
- for (i = 0; funmap_names[i]; i++)
- fprintf (rl_outstream, "%s\n", funmap_names[i]);
-
- xfree (funmap_names);
-}
-
-static char *
-_rl_get_keyname (key)
- int key;
-{
- char *keyname;
- int i, c;
-
- keyname = (char *)xmalloc (8);
-
- c = key;
- /* Since this is going to be used to write out keysequence-function
- pairs for possible inclusion in an inputrc file, we don't want to
- do any special meta processing on KEY. */
-
-#if 1
- /* XXX - Experimental */
- /* We might want to do this, but the old version of the code did not. */
-
- /* If this is an escape character, we don't want to do any more processing.
- Just add the special ESC key sequence and return. */
- if (c == ESC)
- {
- keyname[0] = '\\';
- keyname[1] = 'e';
- keyname[2] = '\0';
- return keyname;
- }
-#endif
-
- /* RUBOUT is translated directly into \C-? */
- if (key == RUBOUT)
- {
- keyname[0] = '\\';
- keyname[1] = 'C';
- keyname[2] = '-';
- keyname[3] = '?';
- keyname[4] = '\0';
- return keyname;
- }
-
- i = 0;
- /* Now add special prefixes needed for control characters. This can
- potentially change C. */
- if (CTRL_CHAR (c))
- {
- keyname[i++] = '\\';
- keyname[i++] = 'C';
- keyname[i++] = '-';
- c = _rl_to_lower (UNCTRL (c));
- }
-
- /* XXX experimental code. Turn the characters that are not ASCII or
- ISO Latin 1 (128 - 159) into octal escape sequences (\200 - \237).
- This changes C. */
- if (c >= 128 && c <= 159)
- {
- keyname[i++] = '\\';
- keyname[i++] = '2';
- c -= 128;
- keyname[i++] = (c / 8) + '0';
- c = (c % 8) + '0';
- }
-
- /* Now, if the character needs to be quoted with a backslash, do that. */
- if (c == '\\' || c == '"')
- keyname[i++] = '\\';
-
- /* Now add the key, terminate the string, and return it. */
- keyname[i++] = (char) c;
- keyname[i] = '\0';
-
- return keyname;
-}
-
-/* Return a NULL terminated array of strings which represent the key
- sequences that are used to invoke FUNCTION in MAP. */
-char **
-rl_invoking_keyseqs_in_map (function, map)
- rl_command_func_t *function;
- Keymap map;
-{
- register int key;
- char **result;
- int result_index, result_size;
-
- result = (char **)NULL;
- result_index = result_size = 0;
-
- for (key = 0; key < KEYMAP_SIZE; key++)
- {
- switch (map[key].type)
- {
- case ISMACR:
- /* Macros match, if, and only if, the pointers are identical.
- Thus, they are treated exactly like functions in here. */
- case ISFUNC:
- /* If the function in the keymap is the one we are looking for,
- then add the current KEY to the list of invoking keys. */
- if (map[key].function == function)
- {
- char *keyname;
-
- keyname = _rl_get_keyname (key);
-
- if (result_index + 2 > result_size)
- {
- result_size += 10;
- result = (char **)xrealloc (result, result_size * sizeof (char *));
- }
-
- result[result_index++] = keyname;
- result[result_index] = (char *)NULL;
- }
- break;
-
- case ISKMAP:
- {
- char **seqs;
- register int i;
-
- /* Find the list of keyseqs in this map which have FUNCTION as
- their target. Add the key sequences found to RESULT. */
- if (map[key].function)
- seqs =
- rl_invoking_keyseqs_in_map (function, FUNCTION_TO_KEYMAP (map, key));
- else
- break;
-
- if (seqs == 0)
- break;
-
- for (i = 0; seqs[i]; i++)
- {
- char *keyname = (char *)xmalloc (6 + strlen (seqs[i]));
-
- if (key == ESC)
- {
- /* If ESC is the meta prefix and we're converting chars
- with the eighth bit set to ESC-prefixed sequences, then
- we can use \M-. Otherwise we need to use the sequence
- for ESC. */
- if (_rl_convert_meta_chars_to_ascii && map[ESC].type == ISKMAP)
- sprintf (keyname, "\\M-");
- else
- sprintf (keyname, "\\e");
- }
- else if (CTRL_CHAR (key))
- sprintf (keyname, "\\C-%c", _rl_to_lower (UNCTRL (key)));
- else if (key == RUBOUT)
- sprintf (keyname, "\\C-?");
- else if (key == '\\' || key == '"')
- {
- keyname[0] = '\\';
- keyname[1] = (char) key;
- keyname[2] = '\0';
- }
- else
- {
- keyname[0] = (char) key;
- keyname[1] = '\0';
- }
-
- strcat (keyname, seqs[i]);
- xfree (seqs[i]);
-
- if (result_index + 2 > result_size)
- {
- result_size += 10;
- result = (char **)xrealloc (result, result_size * sizeof (char *));
- }
-
- result[result_index++] = keyname;
- result[result_index] = (char *)NULL;
- }
-
- xfree (seqs);
- }
- break;
- }
- }
- return (result);
-}
-
-/* Return a NULL terminated array of strings which represent the key
- sequences that can be used to invoke FUNCTION using the current keymap. */
-char **
-rl_invoking_keyseqs (function)
- rl_command_func_t *function;
-{
- return (rl_invoking_keyseqs_in_map (function, _rl_keymap));
-}
-
-/* Print all of the functions and their bindings to rl_outstream. If
- PRINT_READABLY is non-zero, then print the output in such a way
- that it can be read back in. */
-void
-rl_function_dumper (print_readably)
- int print_readably;
-{
- register int i;
- const char **names;
- const char *name;
-
- names = rl_funmap_names ();
-
- fprintf (rl_outstream, "\n");
-
- for (i = 0; name = names[i]; i++)
- {
- rl_command_func_t *function;
- char **invokers;
-
- function = rl_named_function (name);
- invokers = rl_invoking_keyseqs_in_map (function, _rl_keymap);
-
- if (print_readably)
- {
- if (!invokers)
- fprintf (rl_outstream, "# %s (not bound)\n", name);
- else
- {
- register int j;
-
- for (j = 0; invokers[j]; j++)
- {
- fprintf (rl_outstream, "\"%s\": %s\n",
- invokers[j], name);
- xfree (invokers[j]);
- }
-
- xfree (invokers);
- }
- }
- else
- {
- if (!invokers)
- fprintf (rl_outstream, "%s is not bound to any keys\n",
- name);
- else
- {
- register int j;
-
- fprintf (rl_outstream, "%s can be found on ", name);
-
- for (j = 0; invokers[j] && j < 5; j++)
- {
- fprintf (rl_outstream, "\"%s\"%s", invokers[j],
- invokers[j + 1] ? ", " : ".\n");
- }
-
- if (j == 5 && invokers[j])
- fprintf (rl_outstream, "...\n");
-
- for (j = 0; invokers[j]; j++)
- xfree (invokers[j]);
-
- xfree (invokers);
- }
- }
- }
-
- xfree (names);
-}
-
-/* Print all of the current functions and their bindings to
- rl_outstream. If an explicit argument is given, then print
- the output in such a way that it can be read back in. */
-int
-rl_dump_functions (count, key)
- int count, key;
-{
- if (rl_dispatching)
- fprintf (rl_outstream, "\r\n");
- rl_function_dumper (rl_explicit_arg);
- rl_on_new_line ();
- return (0);
-}
-
-static void
-_rl_macro_dumper_internal (print_readably, map, prefix)
- int print_readably;
- Keymap map;
- char *prefix;
-{
- register int key;
- char *keyname, *out;
- int prefix_len;
-
- for (key = 0; key < KEYMAP_SIZE; key++)
- {
- switch (map[key].type)
- {
- case ISMACR:
- keyname = _rl_get_keyname (key);
- out = _rl_untranslate_macro_value ((char *)map[key].function);
-
- if (print_readably)
- fprintf (rl_outstream, "\"%s%s\": \"%s\"\n", prefix ? prefix : "",
- keyname,
- out ? out : "");
- else
- fprintf (rl_outstream, "%s%s outputs %s\n", prefix ? prefix : "",
- keyname,
- out ? out : "");
- xfree (keyname);
- xfree (out);
- break;
- case ISFUNC:
- break;
- case ISKMAP:
- prefix_len = prefix ? strlen (prefix) : 0;
- if (key == ESC)
- {
- keyname = (char *)xmalloc (3 + prefix_len);
- if (prefix)
- strcpy (keyname, prefix);
- keyname[prefix_len] = '\\';
- keyname[prefix_len + 1] = 'e';
- keyname[prefix_len + 2] = '\0';
- }
- else
- {
- keyname = _rl_get_keyname (key);
- if (prefix)
- {
- out = (char *)xmalloc (strlen (keyname) + prefix_len + 1);
- strcpy (out, prefix);
- strcpy (out + prefix_len, keyname);
- xfree (keyname);
- keyname = out;
- }
- }
-
- _rl_macro_dumper_internal (print_readably, FUNCTION_TO_KEYMAP (map, key), keyname);
- xfree (keyname);
- break;
- }
- }
-}
-
-void
-rl_macro_dumper (print_readably)
- int print_readably;
-{
- _rl_macro_dumper_internal (print_readably, _rl_keymap, (char *)NULL);
-}
-
-int
-rl_dump_macros (count, key)
- int count, key;
-{
- if (rl_dispatching)
- fprintf (rl_outstream, "\r\n");
- rl_macro_dumper (rl_explicit_arg);
- rl_on_new_line ();
- return (0);
-}
-
-static char *
-_rl_get_string_variable_value (name)
- const char *name;
-{
- static char numbuf[32];
- char *ret;
-
- if (_rl_stricmp (name, "bell-style") == 0)
- {
- switch (_rl_bell_preference)
- {
- case NO_BELL:
- return "none";
- case VISIBLE_BELL:
- return "visible";
- case AUDIBLE_BELL:
- default:
- return "audible";
- }
- }
- else if (_rl_stricmp (name, "comment-begin") == 0)
- return (_rl_comment_begin ? _rl_comment_begin : RL_COMMENT_BEGIN_DEFAULT);
- else if (_rl_stricmp (name, "completion-display-width") == 0)
- {
- sprintf (numbuf, "%d", _rl_completion_columns);
- return (numbuf);
- }
- else if (_rl_stricmp (name, "completion-prefix-display-length") == 0)
- {
- sprintf (numbuf, "%d", _rl_completion_prefix_display_length);
- return (numbuf);
- }
- else if (_rl_stricmp (name, "completion-query-items") == 0)
- {
- sprintf (numbuf, "%d", rl_completion_query_items);
- return (numbuf);
- }
- else if (_rl_stricmp (name, "editing-mode") == 0)
- return (rl_get_keymap_name_from_edit_mode ());
- else if (_rl_stricmp (name, "history-size") == 0)
- {
- sprintf (numbuf, "%d", history_is_stifled() ? history_max_entries : 0);
- return (numbuf);
- }
- else if (_rl_stricmp (name, "isearch-terminators") == 0)
- {
- if (_rl_isearch_terminators == 0)
- return 0;
- ret = _rl_untranslate_macro_value (_rl_isearch_terminators);
- if (ret)
- {
- strncpy (numbuf, ret, sizeof (numbuf) - 1);
- xfree (ret);
- numbuf[sizeof(numbuf) - 1] = '\0';
- }
- else
- numbuf[0] = '\0';
- return numbuf;
- }
- else if (_rl_stricmp (name, "keymap") == 0)
- {
- ret = rl_get_keymap_name (_rl_keymap);
- if (ret == 0)
- ret = rl_get_keymap_name_from_edit_mode ();
- return (ret ? ret : "none");
- }
- else
- return (0);
-}
-
-void
-rl_variable_dumper (print_readably)
- int print_readably;
-{
- int i;
- char *v;
-
- for (i = 0; boolean_varlist[i].name; i++)
- {
- if (print_readably)
- fprintf (rl_outstream, "set %s %s\n", boolean_varlist[i].name,
- *boolean_varlist[i].value ? "on" : "off");
- else
- fprintf (rl_outstream, "%s is set to `%s'\n", boolean_varlist[i].name,
- *boolean_varlist[i].value ? "on" : "off");
- }
-
- for (i = 0; string_varlist[i].name; i++)
- {
- v = _rl_get_string_variable_value (string_varlist[i].name);
- if (v == 0) /* _rl_isearch_terminators can be NULL */
- continue;
- if (print_readably)
- fprintf (rl_outstream, "set %s %s\n", string_varlist[i].name, v);
- else
- fprintf (rl_outstream, "%s is set to `%s'\n", string_varlist[i].name, v);
- }
-}
-
-/* Print all of the current variables and their values to
- rl_outstream. If an explicit argument is given, then print
- the output in such a way that it can be read back in. */
-int
-rl_dump_variables (count, key)
- int count, key;
-{
- if (rl_dispatching)
- fprintf (rl_outstream, "\r\n");
- rl_variable_dumper (rl_explicit_arg);
- rl_on_new_line ();
- return (0);
-}
-
-/* Return non-zero if any members of ARRAY are a substring in STRING. */
-static int
-substring_member_of_array (string, array)
- const char *string;
- const char * const *array;
-{
- while (*array)
- {
- if (_rl_strindex (string, *array))
- return (1);
- array++;
- }
- return (0);
-}
+++ /dev/null
-/* display.c -- readline redisplay facility. */
-
-/* Copyright (C) 1987-2009 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <sys/types.h>
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-
-#include "posixstat.h"
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif /* HAVE_STDLIB_H */
-
-#include <stdio.h>
-
-#ifdef __MSDOS__
-# include <pc.h>
-#endif
-
-/* System-specific feature definitions and include files. */
-#include "rldefs.h"
-#include "rlmbutil.h"
-
-/* Termcap library stuff. */
-#include "tcap.h"
-
-/* Some standard library routines. */
-#include "readline.h"
-#include "history.h"
-
-#include "rlprivate.h"
-#include "xmalloc.h"
-
-#if !defined (strchr) && !defined (__STDC__)
-extern char *strchr (), *strrchr ();
-#endif /* !strchr && !__STDC__ */
-
-static void update_line PARAMS((char *, char *, int, int, int, int));
-static void space_to_eol PARAMS((int));
-static void delete_chars PARAMS((int));
-static void insert_some_chars PARAMS((char *, int, int));
-static void cr PARAMS((void));
-
-/* State of visible and invisible lines. */
-struct line_state
- {
- char *line;
- int *lbreaks;
- int lbsize;
-#if defined (HANDLE_MULTIBYTE)
- int *wrapped_line;
- int wbsize;
-#endif
- };
-
-/* The line display buffers. One is the line currently displayed on
- the screen. The other is the line about to be displayed. */
-static struct line_state line_state_array[2];
-static struct line_state *line_state_visible = &line_state_array[0];
-static struct line_state *line_state_invisible = &line_state_array[1];
-static int line_structures_initialized = 0;
-
-/* Backwards-compatible names. */
-#define inv_lbreaks (line_state_invisible->lbreaks)
-#define inv_lbsize (line_state_invisible->lbsize)
-#define vis_lbreaks (line_state_visible->lbreaks)
-#define vis_lbsize (line_state_visible->lbsize)
-
-#define visible_line (line_state_visible->line)
-#define invisible_line (line_state_invisible->line)
-
-#if defined (HANDLE_MULTIBYTE)
-static int _rl_col_width PARAMS((const char *, int, int, int));
-#else
-# define _rl_col_width(l, s, e, f) (((e) <= (s)) ? 0 : (e) - (s))
-#endif
-
-/* Heuristic used to decide whether it is faster to move from CUR to NEW
- by backing up or outputting a carriage return and moving forward. CUR
- and NEW are either both buffer positions or absolute screen positions. */
-#define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new)))
-
-/* _rl_last_c_pos is an absolute cursor position in multibyte locales and a
- buffer index in others. This macro is used when deciding whether the
- current cursor position is in the middle of a prompt string containing
- invisible characters. XXX - might need to take `modmark' into account. */
-#define PROMPT_ENDING_INDEX \
- ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) ? prompt_physical_chars : prompt_last_invisible+1)
-
-
-/* **************************************************************** */
-/* */
-/* Display stuff */
-/* */
-/* **************************************************************** */
-
-/* This is the stuff that is hard for me. I never seem to write good
- display routines in C. Let's see how I do this time. */
-
-/* (PWP) Well... Good for a simple line updater, but totally ignores
- the problems of input lines longer than the screen width.
-
- update_line and the code that calls it makes a multiple line,
- automatically wrapping line update. Careful attention needs
- to be paid to the vertical position variables. */
-
-/* Keep two buffers; one which reflects the current contents of the
- screen, and the other to draw what we think the new contents should
- be. Then compare the buffers, and make whatever changes to the
- screen itself that we should. Finally, make the buffer that we
- just drew into be the one which reflects the current contents of the
- screen, and place the cursor where it belongs.
-
- Commands that want to can fix the display themselves, and then let
- this function know that the display has been fixed by setting the
- RL_DISPLAY_FIXED variable. This is good for efficiency. */
-
-/* Application-specific redisplay function. */
-rl_voidfunc_t *rl_redisplay_function = rl_redisplay;
-
-/* Global variables declared here. */
-/* What YOU turn on when you have handled all redisplay yourself. */
-int rl_display_fixed = 0;
-
-int _rl_suppress_redisplay = 0;
-int _rl_want_redisplay = 0;
-
-/* The stuff that gets printed out before the actual text of the line.
- This is usually pointing to rl_prompt. */
-char *rl_display_prompt = (char *)NULL;
-
-/* Pseudo-global variables declared here. */
-
-/* The visible cursor position. If you print some text, adjust this. */
-/* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale
- supporting multibyte characters, and an absolute cursor position when
- in such a locale. This is an artifact of the donated multibyte support.
- Care must be taken when modifying its value. */
-int _rl_last_c_pos = 0;
-int _rl_last_v_pos = 0;
-
-static int cpos_adjusted;
-static int cpos_buffer_position;
-static int prompt_multibyte_chars;
-
-/* Number of lines currently on screen minus 1. */
-int _rl_vis_botlin = 0;
-
-/* Variables used only in this file. */
-/* The last left edge of text that was displayed. This is used when
- doing horizontal scrolling. It shifts in thirds of a screenwidth. */
-static int last_lmargin;
-
-/* A buffer for `modeline' messages. */
-static char *msg_buf = 0;
-static int msg_bufsiz = 0;
-
-/* Non-zero forces the redisplay even if we thought it was unnecessary. */
-static int forced_display;
-
-/* Default and initial buffer size. Can grow. */
-static int line_size = 1024;
-
-/* Variables to keep track of the expanded prompt string, which may
- include invisible characters. */
-
-static char *local_prompt, *local_prompt_prefix;
-static int local_prompt_len;
-static int prompt_visible_length, prompt_prefix_length;
-
-/* The number of invisible characters in the line currently being
- displayed on the screen. */
-static int visible_wrap_offset;
-
-/* The number of invisible characters in the prompt string. Static so it
- can be shared between rl_redisplay and update_line */
-static int wrap_offset;
-
-/* The index of the last invisible character in the prompt string. */
-static int prompt_last_invisible;
-
-/* The length (buffer offset) of the first line of the last (possibly
- multi-line) buffer displayed on the screen. */
-static int visible_first_line_len;
-
-/* Number of invisible characters on the first physical line of the prompt.
- Only valid when the number of physical characters in the prompt exceeds
- (or is equal to) _rl_screenwidth. */
-static int prompt_invis_chars_first_line;
-
-static int prompt_last_screen_line;
-
-static int prompt_physical_chars;
-
-/* set to a non-zero value by rl_redisplay if we are marking modified history
- lines and the current line is so marked. */
-static int modmark;
-
-/* Variables to save and restore prompt and display information. */
-
-/* These are getting numerous enough that it's time to create a struct. */
-
-static char *saved_local_prompt;
-static char *saved_local_prefix;
-static int saved_last_invisible;
-static int saved_visible_length;
-static int saved_prefix_length;
-static int saved_local_length;
-static int saved_invis_chars_first_line;
-static int saved_physical_chars;
-
-/* Expand the prompt string S and return the number of visible
- characters in *LP, if LP is not null. This is currently more-or-less
- a placeholder for expansion. LIP, if non-null is a place to store the
- index of the last invisible character in the returned string. NIFLP,
- if non-zero, is a place to store the number of invisible characters in
- the first prompt line. The previous are used as byte counts -- indexes
- into a character buffer. */
-
-/* Current implementation:
- \001 (^A) start non-visible characters
- \002 (^B) end non-visible characters
- all characters except \001 and \002 (following a \001) are copied to
- the returned string; all characters except those between \001 and
- \002 are assumed to be `visible'. */
-
-static char *
-expand_prompt (pmt, lp, lip, niflp, vlp)
- char *pmt;
- int *lp, *lip, *niflp, *vlp;
-{
- char *r, *ret, *p, *igstart;
- int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars;
-
- /* Short-circuit if we can. */
- if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0)
- {
- r = savestring (pmt);
- if (lp)
- *lp = strlen (r);
- if (lip)
- *lip = 0;
- if (niflp)
- *niflp = 0;
- if (vlp)
- *vlp = lp ? *lp : strlen (r);
- return r;
- }
-
- l = strlen (pmt);
- r = ret = (char *)xmalloc (l + 1);
-
- invfl = 0; /* invisible chars in first line of prompt */
- invflset = 0; /* we only want to set invfl once */
-
- igstart = 0;
- for (rl = ignoring = last = ninvis = physchars = 0, p = pmt; p && *p; p++)
- {
- /* This code strips the invisible character string markers
- RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */
- if (ignoring == 0 && *p == RL_PROMPT_START_IGNORE) /* XXX - check ignoring? */
- {
- ignoring = 1;
- igstart = p;
- continue;
- }
- else if (ignoring && *p == RL_PROMPT_END_IGNORE)
- {
- ignoring = 0;
- if (p != (igstart + 1))
- last = r - ret - 1;
- continue;
- }
- else
- {
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- pind = p - pmt;
- ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO);
- l = ind - pind;
- while (l--)
- *r++ = *p++;
- if (!ignoring)
- {
- /* rl ends up being assigned to prompt_visible_length,
- which is the number of characters in the buffer that
- contribute to characters on the screen, which might
- not be the same as the number of physical characters
- on the screen in the presence of multibyte characters */
- rl += ind - pind;
- physchars += _rl_col_width (pmt, pind, ind, 0);
- }
- else
- ninvis += ind - pind;
- p--; /* compensate for later increment */
- }
- else
-#endif
- {
- *r++ = *p;
- if (!ignoring)
- {
- rl++; /* visible length byte counter */
- physchars++;
- }
- else
- ninvis++; /* invisible chars byte counter */
- }
-
- if (invflset == 0 && rl >= _rl_screenwidth)
- {
- invfl = ninvis;
- invflset = 1;
- }
- }
- }
-
- if (rl < _rl_screenwidth)
- invfl = ninvis;
-
- *r = '\0';
- if (lp)
- *lp = rl;
- if (lip)
- *lip = last;
- if (niflp)
- *niflp = invfl;
- if (vlp)
- *vlp = physchars;
- return ret;
-}
-
-/* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from
- PMT and return the rest of PMT. */
-char *
-_rl_strip_prompt (pmt)
- char *pmt;
-{
- char *ret;
-
- ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL);
- return ret;
-}
-
-/*
- * Expand the prompt string into the various display components, if
- * necessary.
- *
- * local_prompt = expanded last line of string in rl_display_prompt
- * (portion after the final newline)
- * local_prompt_prefix = portion before last newline of rl_display_prompt,
- * expanded via expand_prompt
- * prompt_visible_length = number of visible characters in local_prompt
- * prompt_prefix_length = number of visible characters in local_prompt_prefix
- *
- * This function is called once per call to readline(). It may also be
- * called arbitrarily to expand the primary prompt.
- *
- * The return value is the number of visible characters on the last line
- * of the (possibly multi-line) prompt.
- */
-int
-rl_expand_prompt (prompt)
- char *prompt;
-{
- char *p, *t;
- int c;
-
- /* Clear out any saved values. */
- FREE (local_prompt);
- FREE (local_prompt_prefix);
-
- local_prompt = local_prompt_prefix = (char *)0;
- local_prompt_len = 0;
- prompt_last_invisible = prompt_invis_chars_first_line = 0;
- prompt_visible_length = prompt_physical_chars = 0;
-
- if (prompt == 0 || *prompt == 0)
- return (0);
-
- p = strrchr (prompt, '\n');
- if (!p)
- {
- /* The prompt is only one logical line, though it might wrap. */
- local_prompt = expand_prompt (prompt, &prompt_visible_length,
- &prompt_last_invisible,
- &prompt_invis_chars_first_line,
- &prompt_physical_chars);
- local_prompt_prefix = (char *)0;
- local_prompt_len = local_prompt ? strlen (local_prompt) : 0;
- return (prompt_visible_length);
- }
- else
- {
- /* The prompt spans multiple lines. */
- t = ++p;
- local_prompt = expand_prompt (p, &prompt_visible_length,
- &prompt_last_invisible,
- &prompt_invis_chars_first_line,
- &prompt_physical_chars);
- c = *t; *t = '\0';
- /* The portion of the prompt string up to and including the
- final newline is now null-terminated. */
- local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length,
- (int *)NULL,
- (int *)NULL,
- (int *)NULL);
- *t = c;
- local_prompt_len = local_prompt ? strlen (local_prompt) : 0;
- return (prompt_prefix_length);
- }
-}
-
-/* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated
- arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE
- and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is
- increased. If the lines have already been allocated, this ensures that
- they can hold at least MINSIZE characters. */
-static void
-init_line_structures (minsize)
- int minsize;
-{
- register int n;
-
- if (invisible_line == 0) /* initialize it */
- {
- if (line_size < minsize)
- line_size = minsize;
- visible_line = (char *)xmalloc (line_size);
- invisible_line = (char *)xmalloc (line_size);
- }
- else if (line_size < minsize) /* ensure it can hold MINSIZE chars */
- {
- line_size *= 2;
- if (line_size < minsize)
- line_size = minsize;
- visible_line = (char *)xrealloc (visible_line, line_size);
- invisible_line = (char *)xrealloc (invisible_line, line_size);
- }
-
- for (n = minsize; n < line_size; n++)
- {
- visible_line[n] = 0;
- invisible_line[n] = 1;
- }
-
- if (vis_lbreaks == 0)
- {
- /* should be enough. */
- inv_lbsize = vis_lbsize = 256;
-
-#if defined (HANDLE_MULTIBYTE)
- line_state_visible->wbsize = vis_lbsize;
- line_state_visible->wrapped_line = (int *)xmalloc (line_state_visible->wbsize * sizeof (int));
-
- line_state_invisible->wbsize = inv_lbsize;
- line_state_invisible->wrapped_line = (int *)xmalloc (line_state_invisible->wbsize * sizeof (int));
-#endif
-
- inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int));
- vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int));
- inv_lbreaks[0] = vis_lbreaks[0] = 0;
- }
-
- line_structures_initialized = 1;
-}
-
-/* Basic redisplay algorithm. */
-void
-rl_redisplay ()
-{
- register int in, out, c, linenum, cursor_linenum;
- register char *line;
- int inv_botlin, lb_botlin, lb_linenum, o_cpos;
- int newlines, lpos, temp, n0, num, prompt_lines_estimate;
- char *prompt_this_line;
-#if defined (HANDLE_MULTIBYTE)
- wchar_t wc;
- size_t wc_bytes;
- int wc_width;
- mbstate_t ps;
- int _rl_wrapped_multicolumn = 0;
-#endif
-
- if (_rl_echoing_p == 0)
- return;
-
- /* Block keyboard interrupts because this function manipulates global
- data structures. */
- _rl_block_sigint ();
- RL_SETSTATE (RL_STATE_REDISPLAYING);
-
- if (!rl_display_prompt)
- rl_display_prompt = "";
-
- if (line_structures_initialized == 0)
- {
- init_line_structures (0);
- rl_on_new_line ();
- }
-
- /* Draw the line into the buffer. */
- cpos_buffer_position = -1;
-
- prompt_multibyte_chars = prompt_visible_length - prompt_physical_chars;
-
- line = invisible_line;
- out = inv_botlin = 0;
-
- /* Mark the line as modified or not. We only do this for history
- lines. */
- modmark = 0;
- if (_rl_mark_modified_lines && current_history () && rl_undo_list)
- {
- line[out++] = '*';
- line[out] = '\0';
- modmark = 1;
- }
-
- /* If someone thought that the redisplay was handled, but the currently
- visible line has a different modification state than the one about
- to become visible, then correct the caller's misconception. */
- if (visible_line[0] != invisible_line[0])
- rl_display_fixed = 0;
-
- /* If the prompt to be displayed is the `primary' readline prompt (the
- one passed to readline()), use the values we have already expanded.
- If not, use what's already in rl_display_prompt. WRAP_OFFSET is the
- number of non-visible characters in the prompt string. */
- if (rl_display_prompt == rl_prompt || local_prompt)
- {
- if (local_prompt_prefix && forced_display)
- _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix));
-
- if (local_prompt_len > 0)
- {
- temp = local_prompt_len + out + 2;
- if (temp >= line_size)
- {
- line_size = (temp + 1024) - (temp % 1024);
- visible_line = (char *)xrealloc (visible_line, line_size);
- line = invisible_line = (char *)xrealloc (invisible_line, line_size);
- }
- strncpy (line + out, local_prompt, local_prompt_len);
- out += local_prompt_len;
- }
- line[out] = '\0';
- wrap_offset = local_prompt_len - prompt_visible_length;
- }
- else
- {
- int pmtlen;
- prompt_this_line = strrchr (rl_display_prompt, '\n');
- if (!prompt_this_line)
- prompt_this_line = rl_display_prompt;
- else
- {
- prompt_this_line++;
- pmtlen = prompt_this_line - rl_display_prompt; /* temp var */
- if (forced_display)
- {
- _rl_output_some_chars (rl_display_prompt, pmtlen);
- /* Make sure we are at column zero even after a newline,
- regardless of the state of terminal output processing. */
- if (pmtlen < 2 || prompt_this_line[-2] != '\r')
- cr ();
- }
- }
-
- prompt_physical_chars = pmtlen = strlen (prompt_this_line);
- temp = pmtlen + out + 2;
- if (temp >= line_size)
- {
- line_size = (temp + 1024) - (temp % 1024);
- visible_line = (char *)xrealloc (visible_line, line_size);
- line = invisible_line = (char *)xrealloc (invisible_line, line_size);
- }
- strncpy (line + out, prompt_this_line, pmtlen);
- out += pmtlen;
- line[out] = '\0';
- wrap_offset = prompt_invis_chars_first_line = 0;
- }
-
-#define CHECK_INV_LBREAKS() \
- do { \
- if (newlines >= (inv_lbsize - 2)) \
- { \
- inv_lbsize *= 2; \
- inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \
- } \
- } while (0)
-
-#if defined (HANDLE_MULTIBYTE)
-#define CHECK_LPOS() \
- do { \
- lpos++; \
- if (lpos >= _rl_screenwidth) \
- { \
- if (newlines >= (inv_lbsize - 2)) \
- { \
- inv_lbsize *= 2; \
- inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \
- } \
- inv_lbreaks[++newlines] = out; \
- if (newlines >= (line_state_invisible->wbsize - 1)) \
- { \
- line_state_invisible->wbsize *= 2; \
- line_state_invisible->wrapped_line = (int *)xrealloc (line_state_invisible->wrapped_line, line_state_invisible->wbsize * sizeof(int)); \
- } \
- line_state_invisible->wrapped_line[newlines] = _rl_wrapped_multicolumn; \
- lpos = 0; \
- } \
- } while (0)
-#else
-#define CHECK_LPOS() \
- do { \
- lpos++; \
- if (lpos >= _rl_screenwidth) \
- { \
- if (newlines >= (inv_lbsize - 2)) \
- { \
- inv_lbsize *= 2; \
- inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \
- } \
- inv_lbreaks[++newlines] = out; \
- lpos = 0; \
- } \
- } while (0)
-#endif
-
- /* inv_lbreaks[i] is where line i starts in the buffer. */
- inv_lbreaks[newlines = 0] = 0;
- lpos = prompt_physical_chars + modmark;
-
-#if defined (HANDLE_MULTIBYTE)
- memset (line_state_invisible->wrapped_line, 0, line_state_invisible->wbsize * sizeof (int));
- num = 0;
-#endif
-
- /* prompt_invis_chars_first_line is the number of invisible characters in
- the first physical line of the prompt.
- wrap_offset - prompt_invis_chars_first_line is the number of invis
- chars on the second (or, more generally, last) line. */
-
- /* This is zero-based, used to set the newlines */
- prompt_lines_estimate = lpos / _rl_screenwidth;
-
- /* what if lpos is already >= _rl_screenwidth before we start drawing the
- contents of the command line? */
- while (lpos >= _rl_screenwidth)
- {
- int z;
- /* fix from Darin Johnson <darin@acuson.com> for prompt string with
- invisible characters that is longer than the screen width. The
- prompt_invis_chars_first_line variable could be made into an array
- saying how many invisible characters there are per line, but that's
- probably too much work for the benefit gained. How many people have
- prompts that exceed two physical lines?
- Additional logic fix from Edward Catmur <ed@catmur.co.uk> */
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0)
- {
- n0 = num;
- temp = local_prompt_len;
- while (num < temp)
- {
- z = _rl_col_width (local_prompt, n0, num, 1);
- if (z > _rl_screenwidth)
- {
- num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY);
- break;
- }
- else if (z == _rl_screenwidth)
- break;
- num++;
- }
- temp = num;
- }
- else
-#endif /* !HANDLE_MULTIBYTE */
- temp = ((newlines + 1) * _rl_screenwidth);
-
- /* Now account for invisible characters in the current line. */
- /* XXX - this assumes that the invisible characters may be split, but only
- between the first and the last lines. */
- temp += ((local_prompt_prefix == 0) ? ((newlines == 0) ? prompt_invis_chars_first_line
- : ((newlines == prompt_lines_estimate) ? wrap_offset : prompt_invis_chars_first_line))
- : ((newlines == 0) ? wrap_offset : 0));
-
- inv_lbreaks[++newlines] = temp;
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0)
- lpos -= _rl_col_width (local_prompt, n0, num, 1);
- else
-#endif
- lpos -= _rl_screenwidth;
- }
-
- prompt_last_screen_line = newlines;
-
- /* Draw the rest of the line (after the prompt) into invisible_line, keeping
- track of where the cursor is (cpos_buffer_position), the number of the line containing
- the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin).
- It maintains an array of line breaks for display (inv_lbreaks).
- This handles expanding tabs for display and displaying meta characters. */
- lb_linenum = 0;
-#if defined (HANDLE_MULTIBYTE)
- in = 0;
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- memset (&ps, 0, sizeof (mbstate_t));
- /* XXX - what if wc_bytes ends up <= 0? check for MB_INVALIDCH */
- wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps);
- }
- else
- wc_bytes = 1;
- while (in < rl_end)
-#else
- for (in = 0; in < rl_end; in++)
-#endif
- {
- c = (unsigned char)rl_line_buffer[in];
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- if (MB_INVALIDCH (wc_bytes))
- {
- /* Byte sequence is invalid or shortened. Assume that the
- first byte represents a character. */
- wc_bytes = 1;
- /* Assume that a character occupies a single column. */
- wc_width = 1;
- memset (&ps, 0, sizeof (mbstate_t));
- }
- else if (MB_NULLWCH (wc_bytes))
- break; /* Found '\0' */
- else
- {
- temp = wcwidth (wc);
- wc_width = (temp >= 0) ? temp : 1;
- }
- }
-#endif
-
- if (out + 8 >= line_size) /* XXX - 8 for \t */
- {
- line_size *= 2;
- visible_line = (char *)xrealloc (visible_line, line_size);
- invisible_line = (char *)xrealloc (invisible_line, line_size);
- line = invisible_line;
- }
-
- if (in == rl_point)
- {
- cpos_buffer_position = out;
- lb_linenum = newlines;
- }
-
-#if defined (HANDLE_MULTIBYTE)
- if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */
-#else
- if (META_CHAR (c))
-#endif
- {
- if (_rl_output_meta_chars == 0)
- {
- sprintf (line + out, "\\%o", c);
-
- if (lpos + 4 >= _rl_screenwidth)
- {
- temp = _rl_screenwidth - lpos;
- CHECK_INV_LBREAKS ();
- inv_lbreaks[++newlines] = out + temp;
- lpos = 4 - temp;
- }
- else
- lpos += 4;
-
- out += 4;
- }
- else
- {
- line[out++] = c;
- CHECK_LPOS();
- }
- }
-#if defined (DISPLAY_TABS)
- else if (c == '\t')
- {
- register int newout;
-
-#if 0
- newout = (out | (int)7) + 1;
-#else
- newout = out + 8 - lpos % 8;
-#endif
- temp = newout - out;
- if (lpos + temp >= _rl_screenwidth)
- {
- register int temp2;
- temp2 = _rl_screenwidth - lpos;
- CHECK_INV_LBREAKS ();
- inv_lbreaks[++newlines] = out + temp2;
- lpos = temp - temp2;
- while (out < newout)
- line[out++] = ' ';
- }
- else
- {
- while (out < newout)
- line[out++] = ' ';
- lpos += temp;
- }
- }
-#endif
- else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up)
- {
- line[out++] = '\0'; /* XXX - sentinel */
- CHECK_INV_LBREAKS ();
- inv_lbreaks[++newlines] = out;
- lpos = 0;
- }
- else if (CTRL_CHAR (c) || c == RUBOUT)
- {
- line[out++] = '^';
- CHECK_LPOS();
- line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?';
- CHECK_LPOS();
- }
- else
- {
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- register int i;
-
- _rl_wrapped_multicolumn = 0;
-
- if (_rl_screenwidth < lpos + wc_width)
- for (i = lpos; i < _rl_screenwidth; i++)
- {
- /* The space will be removed in update_line() */
- line[out++] = ' ';
- _rl_wrapped_multicolumn++;
- CHECK_LPOS();
- }
- if (in == rl_point)
- {
- cpos_buffer_position = out;
- lb_linenum = newlines;
- }
- for (i = in; i < in+wc_bytes; i++)
- line[out++] = rl_line_buffer[i];
- for (i = 0; i < wc_width; i++)
- CHECK_LPOS();
- }
- else
- {
- line[out++] = c;
- CHECK_LPOS();
- }
-#else
- line[out++] = c;
- CHECK_LPOS();
-#endif
- }
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- in += wc_bytes;
- /* XXX - what if wc_bytes ends up <= 0? check for MB_INVALIDCH */
- wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps);
- }
- else
- in++;
-#endif
-
- }
- line[out] = '\0';
- if (cpos_buffer_position < 0)
- {
- cpos_buffer_position = out;
- lb_linenum = newlines;
- }
-
- inv_botlin = lb_botlin = newlines;
- CHECK_INV_LBREAKS ();
- inv_lbreaks[newlines+1] = out;
- cursor_linenum = lb_linenum;
-
- /* CPOS_BUFFER_POSITION == position in buffer where cursor should be placed.
- CURSOR_LINENUM == line number where the cursor should be placed. */
-
- /* PWP: now is when things get a bit hairy. The visible and invisible
- line buffers are really multiple lines, which would wrap every
- (screenwidth - 1) characters. Go through each in turn, finding
- the changed region and updating it. The line order is top to bottom. */
-
- /* If we can move the cursor up and down, then use multiple lines,
- otherwise, let long lines display in a single terminal line, and
- horizontally scroll it. */
-
- if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up)
- {
- int nleft, pos, changed_screen_line, tx;
-
- if (!rl_display_fixed || forced_display)
- {
- forced_display = 0;
-
- /* If we have more than a screenful of material to display, then
- only display a screenful. We should display the last screen,
- not the first. */
- if (out >= _rl_screenchars)
- {
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY);
- else
- out = _rl_screenchars - 1;
- }
-
- /* The first line is at character position 0 in the buffer. The
- second and subsequent lines start at inv_lbreaks[N], offset by
- OFFSET (which has already been calculated above). */
-
-#define INVIS_FIRST() (prompt_physical_chars > _rl_screenwidth ? prompt_invis_chars_first_line : wrap_offset)
-#define WRAP_OFFSET(line, offset) ((line == 0) \
- ? (offset ? INVIS_FIRST() : 0) \
- : ((line == prompt_last_screen_line) ? wrap_offset-prompt_invis_chars_first_line : 0))
-#define W_OFFSET(line, offset) ((line) == 0 ? offset : 0)
-#define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l]))
-#define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l])
-#define VIS_CHARS(line) (visible_line + vis_lbreaks[line])
-#define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line)
-#define INV_LINE(line) (invisible_line + inv_lbreaks[line])
-
-#define OLD_CPOS_IN_PROMPT() (cpos_adjusted == 0 && \
- _rl_last_c_pos != o_cpos && \
- _rl_last_c_pos > wrap_offset && \
- o_cpos < prompt_last_invisible)
-
- /* For each line in the buffer, do the updating display. */
- for (linenum = 0; linenum <= inv_botlin; linenum++)
- {
- /* This can lead us astray if we execute a program that changes
- the locale from a non-multibyte to a multibyte one. */
- o_cpos = _rl_last_c_pos;
- cpos_adjusted = 0;
- update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum,
- VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin);
-
- /* update_line potentially changes _rl_last_c_pos, but doesn't
- take invisible characters into account, since _rl_last_c_pos
- is an absolute cursor position in a multibyte locale. See
- if compensating here is the right thing, or if we have to
- change update_line itself. There are several cases in which
- update_line adjusts _rl_last_c_pos itself (so it can pass
- _rl_move_cursor_relative accurate values); it communicates
- this back by setting cpos_adjusted. If we assume that
- _rl_last_c_pos is correct (an absolute cursor position) each
- time update_line is called, then we can assume in our
- calculations that o_cpos does not need to be adjusted by
- wrap_offset. */
- if (linenum == 0 && (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && OLD_CPOS_IN_PROMPT())
- _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */
- else if (linenum == prompt_last_screen_line && prompt_physical_chars > _rl_screenwidth &&
- (MB_CUR_MAX > 1 && rl_byte_oriented == 0) &&
- cpos_adjusted == 0 &&
- _rl_last_c_pos != o_cpos &&
- _rl_last_c_pos > (prompt_last_invisible - _rl_screenwidth - prompt_invis_chars_first_line))
- _rl_last_c_pos -= (wrap_offset-prompt_invis_chars_first_line);
-
- /* If this is the line with the prompt, we might need to
- compensate for invisible characters in the new line. Do
- this only if there is not more than one new line (which
- implies that we completely overwrite the old visible line)
- and the new line is shorter than the old. Make sure we are
- at the end of the new line before clearing. */
- if (linenum == 0 &&
- inv_botlin == 0 && _rl_last_c_pos == out &&
- (wrap_offset > visible_wrap_offset) &&
- (_rl_last_c_pos < visible_first_line_len))
- {
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- nleft = _rl_screenwidth - _rl_last_c_pos;
- else
- nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos;
- if (nleft)
- _rl_clear_to_eol (nleft);
- }
-#if 0
- /* This segment is intended to handle the case where the prompt
- has invisible characters on the second line and the new line
- to be displayed needs to clear the rest of the old characters
- out (e.g., when printing the i-search prompt). In general,
- the case of the new line being shorter than the old.
- Incomplete */
- else if (linenum == prompt_last_screen_line &&
- prompt_physical_chars > _rl_screenwidth &&
- wrap_offset != prompt_invis_chars_first_line &&
- _rl_last_c_pos == out &&
-#endif
-
-
- /* Since the new first line is now visible, save its length. */
- if (linenum == 0)
- visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset;
- }
-
- /* We may have deleted some lines. If so, clear the left over
- blank ones at the bottom out. */
- if (_rl_vis_botlin > inv_botlin)
- {
- char *tt;
- for (; linenum <= _rl_vis_botlin; linenum++)
- {
- tt = VIS_CHARS (linenum);
- _rl_move_vert (linenum);
- _rl_move_cursor_relative (0, tt);
- _rl_clear_to_eol
- ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth);
- }
- }
- _rl_vis_botlin = inv_botlin;
-
- /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a
- different screen line during this redisplay. */
- changed_screen_line = _rl_last_v_pos != cursor_linenum;
- if (changed_screen_line)
- {
- _rl_move_vert (cursor_linenum);
- /* If we moved up to the line with the prompt using _rl_term_up,
- the physical cursor position on the screen stays the same,
- but the buffer position needs to be adjusted to account
- for invisible characters. */
- if ((MB_CUR_MAX == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset)
- _rl_last_c_pos += wrap_offset;
- }
-
- /* We have to reprint the prompt if it contains invisible
- characters, since it's not generally OK to just reprint
- the characters from the current cursor position. But we
- only need to reprint it if the cursor is before the last
- invisible character in the prompt string. */
- nleft = prompt_visible_length + wrap_offset;
- if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 &&
-#if 0
- _rl_last_c_pos <= PROMPT_ENDING_INDEX && local_prompt)
-#else
- _rl_last_c_pos < PROMPT_ENDING_INDEX && local_prompt)
-#endif
- {
-#if defined (__MSDOS__)
- putc ('\r', rl_outstream);
-#else
- if (_rl_term_cr)
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif
- if (modmark)
- _rl_output_some_chars ("*", 1);
-
- _rl_output_some_chars (local_prompt, nleft);
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft, 1) - wrap_offset + modmark;
- else
- _rl_last_c_pos = nleft + modmark;
- }
-
- /* Where on that line? And where does that line start
- in the buffer? */
- pos = inv_lbreaks[cursor_linenum];
- /* nleft == number of characters in the line buffer between the
- start of the line and the desired cursor position. */
- nleft = cpos_buffer_position - pos;
-
- /* NLEFT is now a number of characters in a buffer. When in a
- multibyte locale, however, _rl_last_c_pos is an absolute cursor
- position that doesn't take invisible characters in the prompt
- into account. We use a fudge factor to compensate. */
-
- /* Since _rl_backspace() doesn't know about invisible characters in the
- prompt, and there's no good way to tell it, we compensate for
- those characters here and call _rl_backspace() directly. */
- if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos)
- {
- /* TX == new physical cursor position in multibyte locale. */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- tx = _rl_col_width (&visible_line[pos], 0, nleft, 1) - visible_wrap_offset;
- else
- tx = nleft;
- if (tx >= 0 && _rl_last_c_pos > tx)
- {
- _rl_backspace (_rl_last_c_pos - tx); /* XXX */
- _rl_last_c_pos = tx;
- }
- }
-
- /* We need to note that in a multibyte locale we are dealing with
- _rl_last_c_pos as an absolute cursor position, but moving to a
- point specified by a buffer position (NLEFT) that doesn't take
- invisible characters into account. */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- _rl_move_cursor_relative (nleft, &invisible_line[pos]);
- else if (nleft != _rl_last_c_pos)
- _rl_move_cursor_relative (nleft, &invisible_line[pos]);
- }
- }
- else /* Do horizontal scrolling. */
- {
-#define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0)
- int lmargin, ndisp, nleft, phys_c_pos, t;
-
- /* Always at top line. */
- _rl_last_v_pos = 0;
-
- /* Compute where in the buffer the displayed line should start. This
- will be LMARGIN. */
-
- /* The number of characters that will be displayed before the cursor. */
- ndisp = cpos_buffer_position - wrap_offset;
- nleft = prompt_visible_length + wrap_offset;
- /* Where the new cursor position will be on the screen. This can be
- longer than SCREENWIDTH; if it is, lmargin will be adjusted. */
- phys_c_pos = cpos_buffer_position - (last_lmargin ? last_lmargin : wrap_offset);
- t = _rl_screenwidth / 3;
-
- /* If the number of characters had already exceeded the screenwidth,
- last_lmargin will be > 0. */
-
- /* If the number of characters to be displayed is more than the screen
- width, compute the starting offset so that the cursor is about
- two-thirds of the way across the screen. */
- if (phys_c_pos > _rl_screenwidth - 2)
- {
- lmargin = cpos_buffer_position - (2 * t);
- if (lmargin < 0)
- lmargin = 0;
- /* If the left margin would be in the middle of a prompt with
- invisible characters, don't display the prompt at all. */
- if (wrap_offset && lmargin > 0 && lmargin < nleft)
- lmargin = nleft;
- }
- else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */
- lmargin = 0;
- else if (phys_c_pos < 1)
- {
- /* If we are moving back towards the beginning of the line and
- the last margin is no longer correct, compute a new one. */
- lmargin = ((cpos_buffer_position - 1) / t) * t; /* XXX */
- if (wrap_offset && lmargin > 0 && lmargin < nleft)
- lmargin = nleft;
- }
- else
- lmargin = last_lmargin;
-
- /* If the first character on the screen isn't the first character
- in the display line, indicate this with a special character. */
- if (lmargin > 0)
- line[lmargin] = '<';
-
- /* If SCREENWIDTH characters starting at LMARGIN do not encompass
- the whole line, indicate that with a special character at the
- right edge of the screen. If LMARGIN is 0, we need to take the
- wrap offset into account. */
- t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth;
- if (t < out)
- line[t - 1] = '>';
-
- if (rl_display_fixed == 0 || forced_display || lmargin != last_lmargin)
- {
- forced_display = 0;
- o_cpos = _rl_last_c_pos;
- cpos_adjusted = 0;
- update_line (&visible_line[last_lmargin],
- &invisible_line[lmargin],
- 0,
- _rl_screenwidth + visible_wrap_offset,
- _rl_screenwidth + (lmargin ? 0 : wrap_offset),
- 0);
-
- if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && OLD_CPOS_IN_PROMPT())
- _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */
-
- /* If the visible new line is shorter than the old, but the number
- of invisible characters is greater, and we are at the end of
- the new line, we need to clear to eol. */
- t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset);
- if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) &&
- (_rl_last_c_pos == out) &&
- t < visible_first_line_len)
- {
- nleft = _rl_screenwidth - t;
- _rl_clear_to_eol (nleft);
- }
- visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset);
- if (visible_first_line_len > _rl_screenwidth)
- visible_first_line_len = _rl_screenwidth;
-
- _rl_move_cursor_relative (cpos_buffer_position - lmargin, &invisible_line[lmargin]);
- last_lmargin = lmargin;
- }
- }
- fflush (rl_outstream);
-
- /* Swap visible and non-visible lines. */
- {
- struct line_state *vtemp = line_state_visible;
-
- line_state_visible = line_state_invisible;
- line_state_invisible = vtemp;
-
- rl_display_fixed = 0;
- /* If we are displaying on a single line, and last_lmargin is > 0, we
- are not displaying any invisible characters, so set visible_wrap_offset
- to 0. */
- if (_rl_horizontal_scroll_mode && last_lmargin)
- visible_wrap_offset = 0;
- else
- visible_wrap_offset = wrap_offset;
- }
-
- RL_UNSETSTATE (RL_STATE_REDISPLAYING);
- _rl_release_sigint ();
-}
-
-/* PWP: update_line() is based on finding the middle difference of each
- line on the screen; vis:
-
- /old first difference
- /beginning of line | /old last same /old EOL
- v v v v
-old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as
-new: eddie> Oh, my little buggy says to me, as lurgid as
- ^ ^ ^ ^
- \beginning of line | \new last same \new end of line
- \new first difference
-
- All are character pointers for the sake of speed. Special cases for
- no differences, as well as for end of line additions must be handled.
-
- Could be made even smarter, but this works well enough */
-static void
-update_line (old, new, current_line, omax, nmax, inv_botlin)
- register char *old, *new;
- int current_line, omax, nmax, inv_botlin;
-{
- register char *ofd, *ols, *oe, *nfd, *nls, *ne;
- int temp, lendiff, wsatend, od, nd, twidth, o_cpos;
- int current_invis_chars;
- int col_lendiff, col_temp;
-#if defined (HANDLE_MULTIBYTE)
- mbstate_t ps_new, ps_old;
- int new_offset, old_offset;
-#endif
-
- /* If we're at the right edge of a terminal that supports xn, we're
- ready to wrap around, so do so. This fixes problems with knowing
- the exact cursor position and cut-and-paste with certain terminal
- emulators. In this calculation, TEMP is the physical screen
- position of the cursor. */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- temp = _rl_last_c_pos;
- else
- temp = _rl_last_c_pos - WRAP_OFFSET (_rl_last_v_pos, visible_wrap_offset);
- if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode
- && _rl_last_v_pos == current_line - 1)
- {
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- wchar_t wc;
- mbstate_t ps;
- int tempwidth, bytes;
- size_t ret;
-
- /* This fixes only double-column characters, but if the wrapped
- character comsumes more than three columns, spaces will be
- inserted in the string buffer. */
- if (current_line < line_state_visible->wbsize && line_state_visible->wrapped_line[current_line] > 0)
- _rl_clear_to_eol (line_state_visible->wrapped_line[current_line]);
-
- memset (&ps, 0, sizeof (mbstate_t));
- ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps);
- if (MB_INVALIDCH (ret))
- {
- tempwidth = 1;
- ret = 1;
- }
- else if (MB_NULLWCH (ret))
- tempwidth = 0;
- else
- tempwidth = wcwidth (wc);
-
- if (tempwidth > 0)
- {
- int count, i;
- bytes = ret;
- for (count = 0; count < bytes; count++)
- putc (new[count], rl_outstream);
- _rl_last_c_pos = tempwidth;
- _rl_last_v_pos++;
- memset (&ps, 0, sizeof (mbstate_t));
- ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps);
- if (ret != 0 && bytes != 0)
- {
- if (MB_INVALIDCH (ret))
- ret = 1;
- memmove (old+bytes, old+ret, strlen (old+ret));
- memcpy (old, new, bytes);
- /* Fix up indices if we copy data from one line to another */
- omax += bytes - ret;
- for (i = current_line+1; i < inv_botlin+1; i++)
- vis_lbreaks[i] += bytes - ret;
- }
- }
- else
- {
- putc (' ', rl_outstream);
- _rl_last_c_pos = 1;
- _rl_last_v_pos++;
- if (old[0] && new[0])
- old[0] = new[0];
- }
- }
- else
-#endif
- {
- if (new[0])
- putc (new[0], rl_outstream);
- else
- putc (' ', rl_outstream);
- _rl_last_c_pos = 1;
- _rl_last_v_pos++;
- if (old[0] && new[0])
- old[0] = new[0];
- }
- }
-
-
- /* Find first difference. */
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- /* See if the old line is a subset of the new line, so that the
- only change is adding characters. */
- temp = (omax < nmax) ? omax : nmax;
- if (memcmp (old, new, temp) == 0) /* adding at the end */
- {
- ofd = old + temp;
- nfd = new + temp;
- }
- else
- {
- memset (&ps_new, 0, sizeof(mbstate_t));
- memset (&ps_old, 0, sizeof(mbstate_t));
-
- if (omax == nmax && STREQN (new, old, omax))
- {
- ofd = old + omax;
- nfd = new + nmax;
- }
- else
- {
- new_offset = old_offset = 0;
- for (ofd = old, nfd = new;
- (ofd - old < omax) && *ofd &&
- _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); )
- {
- old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY);
- new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY);
- ofd = old + old_offset;
- nfd = new + new_offset;
- }
- }
- }
- }
- else
-#endif
- for (ofd = old, nfd = new;
- (ofd - old < omax) && *ofd && (*ofd == *nfd);
- ofd++, nfd++)
- ;
-
- /* Move to the end of the screen line. ND and OD are used to keep track
- of the distance between ne and new and oe and old, respectively, to
- move a subtraction out of each loop. */
- for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++);
- for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++);
-
- /* If no difference, continue to next line. */
- if (ofd == oe && nfd == ne)
- return;
-
- wsatend = 1; /* flag for trailing whitespace */
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY);
- nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY);
- while ((ols > ofd) && (nls > nfd))
- {
- memset (&ps_old, 0, sizeof (mbstate_t));
- memset (&ps_new, 0, sizeof (mbstate_t));
-
-#if 0
- /* On advice from jir@yamato.ibm.com */
- _rl_adjust_point (old, ols - old, &ps_old);
- _rl_adjust_point (new, nls - new, &ps_new);
-#endif
-
- if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0)
- break;
-
- if (*ols == ' ')
- wsatend = 0;
-
- ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY);
- nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY);
- }
- }
- else
- {
-#endif /* HANDLE_MULTIBYTE */
- ols = oe - 1; /* find last same */
- nls = ne - 1;
- while ((ols > ofd) && (nls > nfd) && (*ols == *nls))
- {
- if (*ols != ' ')
- wsatend = 0;
- ols--;
- nls--;
- }
-#if defined (HANDLE_MULTIBYTE)
- }
-#endif
-
- if (wsatend)
- {
- ols = oe;
- nls = ne;
- }
-#if defined (HANDLE_MULTIBYTE)
- /* This may not work for stateful encoding, but who cares? To handle
- stateful encoding properly, we have to scan each string from the
- beginning and compare. */
- else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0)
-#else
- else if (*ols != *nls)
-#endif
- {
- if (*ols) /* don't step past the NUL */
- {
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY);
- else
- ols++;
- }
- if (*nls)
- {
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY);
- else
- nls++;
- }
- }
-
- /* count of invisible characters in the current invisible line. */
- current_invis_chars = W_OFFSET (current_line, wrap_offset);
- if (_rl_last_v_pos != current_line)
- {
- _rl_move_vert (current_line);
- if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset)
- _rl_last_c_pos += visible_wrap_offset;
- }
-
- /* If this is the first line and there are invisible characters in the
- prompt string, and the prompt string has not changed, and the current
- cursor position is before the last invisible character in the prompt,
- and the index of the character to move to is past the end of the prompt
- string, then redraw the entire prompt string. We can only do this
- reliably if the terminal supports a `cr' capability.
-
- This is not an efficiency hack -- there is a problem with redrawing
- portions of the prompt string if they contain terminal escape
- sequences (like drawing the `unbold' sequence without a corresponding
- `bold') that manifests itself on certain terminals. */
-
- lendiff = local_prompt_len;
- od = ofd - old; /* index of first difference in visible line */
- if (current_line == 0 && !_rl_horizontal_scroll_mode &&
- _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 &&
- od >= lendiff && _rl_last_c_pos < PROMPT_ENDING_INDEX)
- {
-#if defined (__MSDOS__)
- putc ('\r', rl_outstream);
-#else
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif
- if (modmark)
- _rl_output_some_chars ("*", 1);
- _rl_output_some_chars (local_prompt, lendiff);
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- /* We take wrap_offset into account here so we can pass correct
- information to _rl_move_cursor_relative. */
- _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff, 1) - wrap_offset + modmark;
- cpos_adjusted = 1;
- }
- else
- _rl_last_c_pos = lendiff + modmark;
- }
-
- o_cpos = _rl_last_c_pos;
-
- /* When this function returns, _rl_last_c_pos is correct, and an absolute
- cursor postion in multibyte mode, but a buffer index when not in a
- multibyte locale. */
- _rl_move_cursor_relative (od, old);
-#if 1
-#if defined (HANDLE_MULTIBYTE)
- /* We need to indicate that the cursor position is correct in the presence of
- invisible characters in the prompt string. Let's see if setting this when
- we make sure we're at the end of the drawn prompt string works. */
- if (current_line == 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0 &&
- (_rl_last_c_pos > 0 || o_cpos > 0) &&
- _rl_last_c_pos == prompt_physical_chars)
- cpos_adjusted = 1;
-#endif
-#endif
-
- /* if (len (new) > len (old))
- lendiff == difference in buffer
- col_lendiff == difference on screen
- When not using multibyte characters, these are equal */
- lendiff = (nls - nfd) - (ols - ofd);
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- col_lendiff = _rl_col_width (new, nfd - new, nls - new, 1) - _rl_col_width (old, ofd - old, ols - old, 1);
- else
- col_lendiff = lendiff;
-
- /* If we are changing the number of invisible characters in a line, and
- the spot of first difference is before the end of the invisible chars,
- lendiff needs to be adjusted. */
- if (current_line == 0 && !_rl_horizontal_scroll_mode &&
- current_invis_chars != visible_wrap_offset)
- {
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- lendiff += visible_wrap_offset - current_invis_chars;
- col_lendiff += visible_wrap_offset - current_invis_chars;
- }
- else
- {
- lendiff += visible_wrap_offset - current_invis_chars;
- col_lendiff = lendiff;
- }
- }
-
- /* Insert (diff (len (old), len (new)) ch. */
- temp = ne - nfd;
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- col_temp = _rl_col_width (new, nfd - new, ne - new, 1);
- else
- col_temp = temp;
-
- if (col_lendiff > 0) /* XXX - was lendiff */
- {
- /* Non-zero if we're increasing the number of lines. */
- int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin;
- /* If col_lendiff is > 0, implying that the new string takes up more
- screen real estate than the old, but lendiff is < 0, meaning that it
- takes fewer bytes, we need to just output the characters starting
- from the first difference. These will overwrite what is on the
- display, so there's no reason to do a smart update. This can really
- only happen in a multibyte environment. */
- if (lendiff < 0)
- {
- _rl_output_some_chars (nfd, temp);
- _rl_last_c_pos += _rl_col_width (nfd, 0, temp, 1);
- /* If nfd begins before any invisible characters in the prompt,
- adjust _rl_last_c_pos to account for wrap_offset and set
- cpos_adjusted to let the caller know. */
- if (current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible))
- {
- _rl_last_c_pos -= wrap_offset;
- cpos_adjusted = 1;
- }
- return;
- }
- /* Sometimes it is cheaper to print the characters rather than
- use the terminal's capabilities. If we're growing the number
- of lines, make sure we actually cause the new line to wrap
- around on auto-wrapping terminals. */
- else if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl))
- {
- /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and
- _rl_horizontal_scroll_mode == 1, inserting the characters with
- _rl_term_IC or _rl_term_ic will screw up the screen because of the
- invisible characters. We need to just draw them. */
- /* The same thing happens if we're trying to draw before the last
- invisible character in the prompt string or we're increasing the
- number of invisible characters in the line and we're not drawing
- the entire prompt string. */
- if (*ols && ((_rl_horizontal_scroll_mode &&
- _rl_last_c_pos == 0 &&
- lendiff > prompt_visible_length &&
- current_invis_chars > 0) == 0) &&
- (((MB_CUR_MAX > 1 && rl_byte_oriented == 0) &&
- current_line == 0 && wrap_offset &&
- ((nfd - new) <= prompt_last_invisible) &&
- (col_lendiff < prompt_visible_length)) == 0) &&
- (visible_wrap_offset >= current_invis_chars))
- {
- insert_some_chars (nfd, lendiff, col_lendiff);
- _rl_last_c_pos += col_lendiff;
- }
-#if 0 /* XXX - for now */
- else if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && _rl_last_c_pos == 0 && wrap_offset && (nfd-new) <= prompt_last_invisible && col_lendiff < prompt_visible_length && visible_wrap_offset >= current_invis_chars)
- {
- _rl_output_some_chars (nfd, lendiff);
- _rl_last_c_pos += col_lendiff;
- }
-#endif
- else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0)
- {
- /* At the end of a line the characters do not have to
- be "inserted". They can just be placed on the screen. */
- /* However, this screws up the rest of this block, which
- assumes you've done the insert because you can. */
- _rl_output_some_chars (nfd, lendiff);
- _rl_last_c_pos += col_lendiff;
- }
- else
- {
- _rl_output_some_chars (nfd, temp);
- _rl_last_c_pos += col_temp;
- /* If nfd begins before the last invisible character in the
- prompt, adjust _rl_last_c_pos to account for wrap_offset
- and set cpos_adjusted to let the caller know. */
- if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible))
- {
- _rl_last_c_pos -= wrap_offset;
- cpos_adjusted = 1;
- }
- return;
- }
- /* Copy (new) chars to screen from first diff to last match. */
- temp = nls - nfd;
- if ((temp - lendiff) > 0)
- {
- _rl_output_some_chars (nfd + lendiff, temp - lendiff);
- /* XXX -- this bears closer inspection. Fixes a redisplay bug
- reported against bash-3.0-alpha by Andreas Schwab involving
- multibyte characters and prompt strings with invisible
- characters, but was previously disabled. */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- twidth = _rl_col_width (nfd+lendiff, 0, temp-col_lendiff, 1);
- else
- twidth = temp - lendiff;
- _rl_last_c_pos += twidth;
- /* If nfd begins before the last invisible character in the
- prompt, adjust _rl_last_c_pos to account for wrap_offset
- and set cpos_adjusted to let the caller know. */
- if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible))
- {
- _rl_last_c_pos -= wrap_offset;
- cpos_adjusted = 1;
- }
- }
- }
- else
- {
- /* cannot insert chars, write to EOL */
- _rl_output_some_chars (nfd, temp);
- _rl_last_c_pos += col_temp;
- /* If we're in a multibyte locale and were before the last invisible
- char in the current line (which implies we just output some invisible
- characters) we need to adjust _rl_last_c_pos, since it represents
- a physical character position. */
- if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) &&
- current_line == prompt_last_screen_line && wrap_offset &&
- wrap_offset != prompt_invis_chars_first_line &&
- ((nfd-new) < (prompt_last_invisible-(current_line*_rl_screenwidth))))
- {
- _rl_last_c_pos -= wrap_offset - prompt_invis_chars_first_line;
- cpos_adjusted = 1;
- }
- }
- }
- else /* Delete characters from line. */
- {
- /* If possible and inexpensive to use terminal deletion, then do so. */
- if (_rl_term_dc && (2 * col_temp) >= -col_lendiff)
- {
- /* If all we're doing is erasing the invisible characters in the
- prompt string, don't bother. It screws up the assumptions
- about what's on the screen. */
- if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 &&
- -lendiff == visible_wrap_offset)
- col_lendiff = 0;
-
- if (col_lendiff)
- delete_chars (-col_lendiff); /* delete (diff) characters */
-
- /* Copy (new) chars to screen from first diff to last match */
- temp = nls - nfd;
- if (temp > 0)
- {
- /* If nfd begins at the prompt, or before the invisible
- characters in the prompt, we need to adjust _rl_last_c_pos
- in a multibyte locale to account for the wrap offset and
- set cpos_adjusted accordingly. */
- _rl_output_some_chars (nfd, temp);
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- _rl_last_c_pos += _rl_col_width (nfd, 0, temp, 1);
- if (current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible))
- {
- _rl_last_c_pos -= wrap_offset;
- cpos_adjusted = 1;
- }
- }
- else
- _rl_last_c_pos += temp;
- }
- }
- /* Otherwise, print over the existing material. */
- else
- {
- if (temp > 0)
- {
- /* If nfd begins at the prompt, or before the invisible
- characters in the prompt, we need to adjust _rl_last_c_pos
- in a multibyte locale to account for the wrap offset and
- set cpos_adjusted accordingly. */
- _rl_output_some_chars (nfd, temp);
- _rl_last_c_pos += col_temp; /* XXX */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- if (current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible))
- {
- _rl_last_c_pos -= wrap_offset;
- cpos_adjusted = 1;
- }
- }
- }
- lendiff = (oe - old) - (ne - new);
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- col_lendiff = _rl_col_width (old, 0, oe - old, 1) - _rl_col_width (new, 0, ne - new, 1);
- else
- col_lendiff = lendiff;
-
-#if 0
- if (col_lendiff)
-#else
- /* If we've already printed over the entire width of the screen,
- including the old material, then col_lendiff doesn't matter and
- space_to_eol will insert too many spaces. XXX - maybe we should
- adjust col_lendiff based on the difference between _rl_last_c_pos
- and _rl_screenwidth */
- if (col_lendiff && ((MB_CUR_MAX == 1 || rl_byte_oriented) || (_rl_last_c_pos < _rl_screenwidth)))
-#endif
- {
- if (_rl_term_autowrap && current_line < inv_botlin)
- space_to_eol (col_lendiff);
- else
- _rl_clear_to_eol (col_lendiff);
- }
- }
- }
-}
-
-/* Tell the update routines that we have moved onto a new (empty) line. */
-int
-rl_on_new_line ()
-{
- if (visible_line)
- visible_line[0] = '\0';
-
- _rl_last_c_pos = _rl_last_v_pos = 0;
- _rl_vis_botlin = last_lmargin = 0;
- if (vis_lbreaks)
- vis_lbreaks[0] = vis_lbreaks[1] = 0;
- visible_wrap_offset = 0;
- return 0;
-}
-
-/* Tell the update routines that we have moved onto a new line with the
- prompt already displayed. Code originally from the version of readline
- distributed with CLISP. rl_expand_prompt must have already been called
- (explicitly or implicitly). This still doesn't work exactly right. */
-int
-rl_on_new_line_with_prompt ()
-{
- int prompt_size, i, l, real_screenwidth, newlines;
- char *prompt_last_line, *lprompt;
-
- /* Initialize visible_line and invisible_line to ensure that they can hold
- the already-displayed prompt. */
- prompt_size = strlen (rl_prompt) + 1;
- init_line_structures (prompt_size);
-
- /* Make sure the line structures hold the already-displayed prompt for
- redisplay. */
- lprompt = local_prompt ? local_prompt : rl_prompt;
- strcpy (visible_line, lprompt);
- strcpy (invisible_line, lprompt);
-
- /* If the prompt contains newlines, take the last tail. */
- prompt_last_line = strrchr (rl_prompt, '\n');
- if (!prompt_last_line)
- prompt_last_line = rl_prompt;
-
- l = strlen (prompt_last_line);
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l, 1); /* XXX */
- else
- _rl_last_c_pos = l;
-
- /* Dissect prompt_last_line into screen lines. Note that here we have
- to use the real screenwidth. Readline's notion of screenwidth might be
- one less, see terminal.c. */
- real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1);
- _rl_last_v_pos = l / real_screenwidth;
- /* If the prompt length is a multiple of real_screenwidth, we don't know
- whether the cursor is at the end of the last line, or already at the
- beginning of the next line. Output a newline just to be safe. */
- if (l > 0 && (l % real_screenwidth) == 0)
- _rl_output_some_chars ("\n", 1);
- last_lmargin = 0;
-
- newlines = 0; i = 0;
- while (i <= l)
- {
- _rl_vis_botlin = newlines;
- vis_lbreaks[newlines++] = i;
- i += real_screenwidth;
- }
- vis_lbreaks[newlines] = l;
- visible_wrap_offset = 0;
-
- rl_display_prompt = rl_prompt; /* XXX - make sure it's set */
-
- return 0;
-}
-
-/* Actually update the display, period. */
-int
-rl_forced_update_display ()
-{
- register char *temp;
-
- if (visible_line)
- {
- temp = visible_line;
- while (*temp)
- *temp++ = '\0';
- }
- rl_on_new_line ();
- forced_display++;
- (*rl_redisplay_function) ();
- return 0;
-}
-
-/* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices.
- (Well, when we don't have multibyte characters, _rl_last_c_pos is a
- buffer index.)
- DATA is the contents of the screen line of interest; i.e., where
- the movement is being done. */
-void
-_rl_move_cursor_relative (new, data)
- int new;
- const char *data;
-{
- register int i;
- int woff; /* number of invisible chars on current line */
- int cpos, dpos; /* current and desired cursor positions */
- int adjust;
-
- woff = WRAP_OFFSET (_rl_last_v_pos, wrap_offset);
- cpos = _rl_last_c_pos;
-
- if (cpos == 0 && cpos == new)
- return;
-
-#if defined (HANDLE_MULTIBYTE)
- /* If we have multibyte characters, NEW is indexed by the buffer point in
- a multibyte string, but _rl_last_c_pos is the display position. In
- this case, NEW's display position is not obvious and must be
- calculated. We need to account for invisible characters in this line,
- as long as we are past them and they are counted by _rl_col_width. */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- adjust = 1;
- /* Try to short-circuit common cases and eliminate a bunch of multibyte
- character function calls. */
- /* 1. prompt string */
- if (new == local_prompt_len && memcmp (data, local_prompt, new) == 0)
- {
- dpos = prompt_physical_chars;
- cpos_adjusted = 1;
- adjust = 0;
- }
- /* 2. prompt_string + line contents */
- else if (new > local_prompt_len && local_prompt && memcmp (data, local_prompt, local_prompt_len) == 0)
- {
- dpos = prompt_physical_chars + _rl_col_width (data, local_prompt_len, new, 1);
- cpos_adjusted = 1;
- adjust = 0;
- }
- else
- dpos = _rl_col_width (data, 0, new, 1);
-
- /* Use NEW when comparing against the last invisible character in the
- prompt string, since they're both buffer indices and DPOS is a
- desired display position. */
- if (adjust && ((new > prompt_last_invisible) || /* XXX - don't use woff here */
- (prompt_physical_chars >= _rl_screenwidth &&
- _rl_last_v_pos == prompt_last_screen_line &&
- wrap_offset >= woff && dpos >= woff &&
- new > (prompt_last_invisible-(_rl_screenwidth*_rl_last_v_pos)-wrap_offset))))
- /* XXX last comparison might need to be >= */
- {
- dpos -= woff;
- /* Since this will be assigned to _rl_last_c_pos at the end (more
- precisely, _rl_last_c_pos == dpos when this function returns),
- let the caller know. */
- cpos_adjusted = 1;
- }
- }
- else
-#endif
- dpos = new;
-
- /* If we don't have to do anything, then return. */
- if (cpos == dpos)
- return;
-
- /* It may be faster to output a CR, and then move forwards instead
- of moving backwards. */
- /* i == current physical cursor position. */
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- i = _rl_last_c_pos;
- else
-#endif
- i = _rl_last_c_pos - woff;
- if (dpos == 0 || CR_FASTER (dpos, _rl_last_c_pos) ||
- (_rl_term_autowrap && i == _rl_screenwidth))
- {
-#if defined (__MSDOS__)
- putc ('\r', rl_outstream);
-#else
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif /* !__MSDOS__ */
- cpos = _rl_last_c_pos = 0;
- }
-
- if (cpos < dpos)
- {
- /* Move the cursor forward. We do it by printing the command
- to move the cursor forward if there is one, else print that
- portion of the output buffer again. Which is cheaper? */
-
- /* The above comment is left here for posterity. It is faster
- to print one character (non-control) than to print a control
- sequence telling the terminal to move forward one character.
- That kind of control is for people who don't know what the
- data is underneath the cursor. */
-
- /* However, we need a handle on where the current display position is
- in the buffer for the immediately preceding comment to be true.
- In multibyte locales, we don't currently have that info available.
- Without it, we don't know where the data we have to display begins
- in the buffer and we have to go back to the beginning of the screen
- line. In this case, we can use the terminal sequence to move forward
- if it's available. */
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- if (_rl_term_forward_char)
- {
- for (i = cpos; i < dpos; i++)
- tputs (_rl_term_forward_char, 1, _rl_output_character_function);
- }
- else
- {
- tputs (_rl_term_cr, 1, _rl_output_character_function);
- for (i = 0; i < new; i++)
- putc (data[i], rl_outstream);
- }
- }
- else
- for (i = cpos; i < new; i++)
- putc (data[i], rl_outstream);
- }
-
-#if defined (HANDLE_MULTIBYTE)
- /* NEW points to the buffer point, but _rl_last_c_pos is the display point.
- The byte length of the string is probably bigger than the column width
- of the string, which means that if NEW == _rl_last_c_pos, then NEW's
- display point is less than _rl_last_c_pos. */
-#endif
- else if (cpos > dpos)
- _rl_backspace (cpos - dpos);
-
- _rl_last_c_pos = dpos;
-}
-
-/* PWP: move the cursor up or down. */
-void
-_rl_move_vert (to)
- int to;
-{
- register int delta, i;
-
- if (_rl_last_v_pos == to || to > _rl_screenheight)
- return;
-
- if ((delta = to - _rl_last_v_pos) > 0)
- {
- for (i = 0; i < delta; i++)
- putc ('\n', rl_outstream);
-#if defined (__MSDOS__)
- putc ('\r', rl_outstream);
-#else
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif
- _rl_last_c_pos = 0;
- }
- else
- { /* delta < 0 */
-#ifdef __DJGPP__
- int row, col;
-
- fflush (rl_outstream);
- ScreenGetCursor (&row, &col);
- ScreenSetCursor (row + delta, col);
- i = -delta;
-#else
- if (_rl_term_up && *_rl_term_up)
- for (i = 0; i < -delta; i++)
- tputs (_rl_term_up, 1, _rl_output_character_function);
-#endif /* !__DJGPP__ */
- }
-
- _rl_last_v_pos = to; /* Now TO is here */
-}
-
-/* Physically print C on rl_outstream. This is for functions which know
- how to optimize the display. Return the number of characters output. */
-int
-rl_show_char (c)
- int c;
-{
- int n = 1;
- if (META_CHAR (c) && (_rl_output_meta_chars == 0))
- {
- fprintf (rl_outstream, "M-");
- n += 2;
- c = UNMETA (c);
- }
-
-#if defined (DISPLAY_TABS)
- if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT)
-#else
- if (CTRL_CHAR (c) || c == RUBOUT)
-#endif /* !DISPLAY_TABS */
- {
- fprintf (rl_outstream, "C-");
- n += 2;
- c = CTRL_CHAR (c) ? UNCTRL (c) : '?';
- }
-
- putc (c, rl_outstream);
- fflush (rl_outstream);
- return n;
-}
-
-int
-rl_character_len (c, pos)
- register int c, pos;
-{
- unsigned char uc;
-
- uc = (unsigned char)c;
-
- if (META_CHAR (uc))
- return ((_rl_output_meta_chars == 0) ? 4 : 1);
-
- if (uc == '\t')
- {
-#if defined (DISPLAY_TABS)
- return (((pos | 7) + 1) - pos);
-#else
- return (2);
-#endif /* !DISPLAY_TABS */
- }
-
- if (CTRL_CHAR (c) || c == RUBOUT)
- return (2);
-
- return ((ISPRINT (uc)) ? 1 : 2);
-}
-/* How to print things in the "echo-area". The prompt is treated as a
- mini-modeline. */
-static int msg_saved_prompt = 0;
-
-#if defined (USE_VARARGS)
-int
-#if defined (PREFER_STDARG)
-rl_message (const char *format, ...)
-#else
-rl_message (va_alist)
- va_dcl
-#endif
-{
- va_list args;
-#if defined (PREFER_VARARGS)
- char *format;
-#endif
-#if defined (HAVE_VSNPRINTF)
- int bneed;
-#endif
-
-#if defined (PREFER_STDARG)
- va_start (args, format);
-#else
- va_start (args);
- format = va_arg (args, char *);
-#endif
-
- if (msg_buf == 0)
- msg_buf = xmalloc (msg_bufsiz = 128);
-
-#if defined (HAVE_VSNPRINTF)
- bneed = vsnprintf (msg_buf, msg_bufsiz - 1, format, args);
- if (bneed >= msg_bufsiz - 1)
- {
- msg_bufsiz = bneed + 1;
- msg_buf = xrealloc (msg_buf, msg_bufsiz);
- va_end (args);
-
-#if defined (PREFER_STDARG)
- va_start (args, format);
-#else
- va_start (args);
- format = va_arg (args, char *);
-#endif
- vsnprintf (msg_buf, msg_bufsiz - 1, format, args);
- }
-#else
- vsprintf (msg_buf, format, args);
- msg_buf[msg_bufsiz - 1] = '\0'; /* overflow? */
-#endif
- va_end (args);
-
- if (saved_local_prompt == 0)
- {
- rl_save_prompt ();
- msg_saved_prompt = 1;
- }
- rl_display_prompt = msg_buf;
- local_prompt = expand_prompt (msg_buf, &prompt_visible_length,
- &prompt_last_invisible,
- &prompt_invis_chars_first_line,
- &prompt_physical_chars);
- local_prompt_prefix = (char *)NULL;
- local_prompt_len = local_prompt ? strlen (local_prompt) : 0;
- (*rl_redisplay_function) ();
-
- return 0;
-}
-#else /* !USE_VARARGS */
-int
-rl_message (format, arg1, arg2)
- char *format;
-{
- if (msg_buf == 0)
- msg_buf = xmalloc (msg_bufsiz = 128);
-
- sprintf (msg_buf, format, arg1, arg2);
- msg_buf[msg_bufsiz - 1] = '\0'; /* overflow? */
-
- rl_display_prompt = msg_buf;
- if (saved_local_prompt == 0)
- {
- rl_save_prompt ();
- msg_saved_prompt = 1;
- }
- local_prompt = expand_prompt (msg_buf, &prompt_visible_length,
- &prompt_last_invisible,
- &prompt_invis_chars_first_line,
- &prompt_physical_chars);
- local_prompt_prefix = (char *)NULL;
- local_prompt_len = local_prompt ? strlen (local_prompt) : 0;
- (*rl_redisplay_function) ();
-
- return 0;
-}
-#endif /* !USE_VARARGS */
-
-/* How to clear things from the "echo-area". */
-int
-rl_clear_message ()
-{
- rl_display_prompt = rl_prompt;
- if (msg_saved_prompt)
- {
- rl_restore_prompt ();
- msg_saved_prompt = 0;
- }
- (*rl_redisplay_function) ();
- return 0;
-}
-
-int
-rl_reset_line_state ()
-{
- rl_on_new_line ();
-
- rl_display_prompt = rl_prompt ? rl_prompt : "";
- forced_display = 1;
- return 0;
-}
-
-void
-rl_save_prompt ()
-{
- saved_local_prompt = local_prompt;
- saved_local_prefix = local_prompt_prefix;
- saved_prefix_length = prompt_prefix_length;
- saved_local_length = local_prompt_len;
- saved_last_invisible = prompt_last_invisible;
- saved_visible_length = prompt_visible_length;
- saved_invis_chars_first_line = prompt_invis_chars_first_line;
- saved_physical_chars = prompt_physical_chars;
-
- local_prompt = local_prompt_prefix = (char *)0;
- local_prompt_len = 0;
- prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0;
- prompt_invis_chars_first_line = prompt_physical_chars = 0;
-}
-
-void
-rl_restore_prompt ()
-{
- FREE (local_prompt);
- FREE (local_prompt_prefix);
-
- local_prompt = saved_local_prompt;
- local_prompt_prefix = saved_local_prefix;
- local_prompt_len = saved_local_length;
- prompt_prefix_length = saved_prefix_length;
- prompt_last_invisible = saved_last_invisible;
- prompt_visible_length = saved_visible_length;
- prompt_invis_chars_first_line = saved_invis_chars_first_line;
- prompt_physical_chars = saved_physical_chars;
-
- /* can test saved_local_prompt to see if prompt info has been saved. */
- saved_local_prompt = saved_local_prefix = (char *)0;
- saved_local_length = 0;
- saved_last_invisible = saved_visible_length = saved_prefix_length = 0;
- saved_invis_chars_first_line = saved_physical_chars = 0;
-}
-
-char *
-_rl_make_prompt_for_search (pchar)
- int pchar;
-{
- int len;
- char *pmt, *p;
-
- rl_save_prompt ();
-
- /* We've saved the prompt, and can do anything with the various prompt
- strings we need before they're restored. We want the unexpanded
- portion of the prompt string after any final newline. */
- p = rl_prompt ? strrchr (rl_prompt, '\n') : 0;
- if (p == 0)
- {
- len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0;
- pmt = (char *)xmalloc (len + 2);
- if (len)
- strcpy (pmt, rl_prompt);
- pmt[len] = pchar;
- pmt[len+1] = '\0';
- }
- else
- {
- p++;
- len = strlen (p);
- pmt = (char *)xmalloc (len + 2);
- if (len)
- strcpy (pmt, p);
- pmt[len] = pchar;
- pmt[len+1] = '\0';
- }
-
- /* will be overwritten by expand_prompt, called from rl_message */
- prompt_physical_chars = saved_physical_chars + 1;
- return pmt;
-}
-
-/* Quick redisplay hack when erasing characters at the end of the line. */
-void
-_rl_erase_at_end_of_line (l)
- int l;
-{
- register int i;
-
- _rl_backspace (l);
- for (i = 0; i < l; i++)
- putc (' ', rl_outstream);
- _rl_backspace (l);
- for (i = 0; i < l; i++)
- visible_line[--_rl_last_c_pos] = '\0';
- rl_display_fixed++;
-}
-
-/* Clear to the end of the line. COUNT is the minimum
- number of character spaces to clear, */
-void
-_rl_clear_to_eol (count)
- int count;
-{
-#ifndef __MSDOS__
- if (_rl_term_clreol)
- tputs (_rl_term_clreol, 1, _rl_output_character_function);
- else
-#endif
- if (count)
- space_to_eol (count);
-}
-
-/* Clear to the end of the line using spaces. COUNT is the minimum
- number of character spaces to clear, */
-static void
-space_to_eol (count)
- int count;
-{
- register int i;
-
- for (i = 0; i < count; i++)
- putc (' ', rl_outstream);
-
- _rl_last_c_pos += count;
-}
-
-void
-_rl_clear_screen ()
-{
-#ifndef __DJGPP__
- if (_rl_term_clrpag)
- tputs (_rl_term_clrpag, 1, _rl_output_character_function);
- else
- rl_crlf ();
-#else
- ScreenClear ();
- ScreenSetCursor (0, 0);
-#endif /* __DJGPP__ */
-}
-
-/* Insert COUNT characters from STRING to the output stream at column COL. */
-static void
-insert_some_chars (string, count, col)
- char *string;
- int count, col;
-{
-#if defined (__MSDOS__) || defined (__MINGW32__)
- _rl_output_some_chars (string, count);
-#else
- /* DEBUGGING */
- if (MB_CUR_MAX == 1 || rl_byte_oriented)
- if (count != col)
- _rl_ttymsg ("debug: insert_some_chars: count (%d) != col (%d)", count, col);
-
- /* If IC is defined, then we do not have to "enter" insert mode. */
- if (_rl_term_IC)
- {
- char *buffer;
-
- buffer = tgoto (_rl_term_IC, 0, col);
- tputs (buffer, 1, _rl_output_character_function);
- _rl_output_some_chars (string, count);
- }
- else
- {
- register int i;
-
- /* If we have to turn on insert-mode, then do so. */
- if (_rl_term_im && *_rl_term_im)
- tputs (_rl_term_im, 1, _rl_output_character_function);
-
- /* If there is a special command for inserting characters, then
- use that first to open up the space. */
- if (_rl_term_ic && *_rl_term_ic)
- {
- for (i = col; i--; )
- tputs (_rl_term_ic, 1, _rl_output_character_function);
- }
-
- /* Print the text. */
- _rl_output_some_chars (string, count);
-
- /* If there is a string to turn off insert mode, we had best use
- it now. */
- if (_rl_term_ei && *_rl_term_ei)
- tputs (_rl_term_ei, 1, _rl_output_character_function);
- }
-#endif /* __MSDOS__ || __MINGW32__ */
-}
-
-/* Delete COUNT characters from the display line. */
-static void
-delete_chars (count)
- int count;
-{
- if (count > _rl_screenwidth) /* XXX */
- return;
-
-#if !defined (__MSDOS__) && !defined (__MINGW32__)
- if (_rl_term_DC && *_rl_term_DC)
- {
- char *buffer;
- buffer = tgoto (_rl_term_DC, count, count);
- tputs (buffer, count, _rl_output_character_function);
- }
- else
- {
- if (_rl_term_dc && *_rl_term_dc)
- while (count--)
- tputs (_rl_term_dc, 1, _rl_output_character_function);
- }
-#endif /* !__MSDOS__ && !__MINGW32__ */
-}
-
-void
-_rl_update_final ()
-{
- int full_lines;
-
- full_lines = 0;
- /* If the cursor is the only thing on an otherwise-blank last line,
- compensate so we don't print an extra CRLF. */
- if (_rl_vis_botlin && _rl_last_c_pos == 0 &&
- visible_line[vis_lbreaks[_rl_vis_botlin]] == 0)
- {
- _rl_vis_botlin--;
- full_lines = 1;
- }
- _rl_move_vert (_rl_vis_botlin);
- /* If we've wrapped lines, remove the final xterm line-wrap flag. */
- if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth))
- {
- char *last_line;
-
- last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]];
- cpos_buffer_position = -1; /* don't know where we are in buffer */
- _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); /* XXX */
- _rl_clear_to_eol (0);
- putc (last_line[_rl_screenwidth - 1], rl_outstream);
- }
- _rl_vis_botlin = 0;
- rl_crlf ();
- fflush (rl_outstream);
- rl_display_fixed++;
-}
-
-/* Move to the start of the current line. */
-static void
-cr ()
-{
- if (_rl_term_cr)
- {
-#if defined (__MSDOS__)
- putc ('\r', rl_outstream);
-#else
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif
- _rl_last_c_pos = 0;
- }
-}
-
-/* Redraw the last line of a multi-line prompt that may possibly contain
- terminal escape sequences. Called with the cursor at column 0 of the
- line to draw the prompt on. */
-static void
-redraw_prompt (t)
- char *t;
-{
- char *oldp;
-
- oldp = rl_display_prompt;
- rl_save_prompt ();
-
- rl_display_prompt = t;
- local_prompt = expand_prompt (t, &prompt_visible_length,
- &prompt_last_invisible,
- &prompt_invis_chars_first_line,
- &prompt_physical_chars);
- local_prompt_prefix = (char *)NULL;
- local_prompt_len = local_prompt ? strlen (local_prompt) : 0;
-
- rl_forced_update_display ();
-
- rl_display_prompt = oldp;
- rl_restore_prompt();
-}
-
-/* Redisplay the current line after a SIGWINCH is received. */
-void
-_rl_redisplay_after_sigwinch ()
-{
- char *t;
-
- /* Clear the last line (assuming that the screen size change will result in
- either more or fewer characters on that line only) and put the cursor at
- column 0. Make sure the right thing happens if we have wrapped to a new
- screen line. */
- if (_rl_term_cr)
- {
- _rl_move_vert (_rl_vis_botlin);
-
-#if defined (__MSDOS__)
- putc ('\r', rl_outstream);
-#else
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif
- _rl_last_c_pos = 0;
-#if defined (__MSDOS__)
- space_to_eol (_rl_screenwidth);
- putc ('\r', rl_outstream);
-#else
- if (_rl_term_clreol)
- tputs (_rl_term_clreol, 1, _rl_output_character_function);
- else
- {
- space_to_eol (_rl_screenwidth);
- tputs (_rl_term_cr, 1, _rl_output_character_function);
- }
-#endif
- if (_rl_last_v_pos > 0)
- _rl_move_vert (0);
- }
- else
- rl_crlf ();
-
- /* Redraw only the last line of a multi-line prompt. */
- t = strrchr (rl_display_prompt, '\n');
- if (t)
- redraw_prompt (++t);
- else
- rl_forced_update_display ();
-}
-
-void
-_rl_clean_up_for_exit ()
-{
- if (_rl_echoing_p)
- {
- _rl_move_vert (_rl_vis_botlin);
- _rl_vis_botlin = 0;
- fflush (rl_outstream);
- rl_restart_output (1, 0);
- }
-}
-
-void
-_rl_erase_entire_line ()
-{
- cr ();
- _rl_clear_to_eol (0);
- cr ();
- fflush (rl_outstream);
-}
-
-/* return the `current display line' of the cursor -- the number of lines to
- move up to get to the first screen line of the current readline line. */
-int
-_rl_current_display_line ()
-{
- int ret, nleft;
-
- /* Find out whether or not there might be invisible characters in the
- editing buffer. */
- if (rl_display_prompt == rl_prompt)
- nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length;
- else
- nleft = _rl_last_c_pos - _rl_screenwidth;
-
- if (nleft > 0)
- ret = 1 + nleft / _rl_screenwidth;
- else
- ret = 0;
-
- return ret;
-}
-
-#if defined (HANDLE_MULTIBYTE)
-/* Calculate the number of screen columns occupied by STR from START to END.
- In the case of multibyte characters with stateful encoding, we have to
- scan from the beginning of the string to take the state into account. */
-static int
-_rl_col_width (str, start, end, flags)
- const char *str;
- int start, end, flags;
-{
- wchar_t wc;
- mbstate_t ps;
- int tmp, point, width, max;
-
- if (end <= start)
- return 0;
- if (MB_CUR_MAX == 1 || rl_byte_oriented)
-{
-_rl_ttymsg ("_rl_col_width: called with MB_CUR_MAX == 1");
- return (end - start);
-}
-
- memset (&ps, 0, sizeof (mbstate_t));
-
- point = 0;
- max = end;
-
- /* Try to short-circuit common cases. The adjustment to remove wrap_offset
- is done by the caller. */
- /* 1. prompt string */
- if (flags && start == 0 && end == local_prompt_len && memcmp (str, local_prompt, local_prompt_len) == 0)
- return (prompt_physical_chars + wrap_offset);
- /* 2. prompt string + line contents */
- else if (flags && start == 0 && local_prompt_len > 0 && end > local_prompt_len && local_prompt && memcmp (str, local_prompt, local_prompt_len) == 0)
- {
- tmp = prompt_physical_chars + wrap_offset;
- /* XXX - try to call ourselves recursively with non-prompt portion */
- tmp += _rl_col_width (str, local_prompt_len, end, flags);
- return (tmp);
- }
-
- while (point < start)
- {
- tmp = mbrlen (str + point, max, &ps);
- if (MB_INVALIDCH ((size_t)tmp))
- {
- /* In this case, the bytes are invalid or too short to compose a
- multibyte character, so we assume that the first byte represents
- a single character. */
- point++;
- max--;
-
- /* Clear the state of the byte sequence, because in this case the
- effect of mbstate is undefined. */
- memset (&ps, 0, sizeof (mbstate_t));
- }
- else if (MB_NULLWCH (tmp))
- break; /* Found '\0' */
- else
- {
- point += tmp;
- max -= tmp;
- }
- }
-
- /* If START is not a byte that starts a character, then POINT will be
- greater than START. In this case, assume that (POINT - START) gives
- a byte count that is the number of columns of difference. */
- width = point - start;
-
- while (point < end)
- {
- tmp = mbrtowc (&wc, str + point, max, &ps);
- if (MB_INVALIDCH ((size_t)tmp))
- {
- /* In this case, the bytes are invalid or too short to compose a
- multibyte character, so we assume that the first byte represents
- a single character. */
- point++;
- max--;
-
- /* and assume that the byte occupies a single column. */
- width++;
-
- /* Clear the state of the byte sequence, because in this case the
- effect of mbstate is undefined. */
- memset (&ps, 0, sizeof (mbstate_t));
- }
- else if (MB_NULLWCH (tmp))
- break; /* Found '\0' */
- else
- {
- point += tmp;
- max -= tmp;
-#if defined (MACOSX)
- if (wc >= 769 && wc <= 833)
- tmp = 0;
- else
-#endif
- tmp = wcwidth(wc);
- width += (tmp >= 0) ? tmp : 1;
- }
- }
-
- width += point - end;
-
- return width;
-}
-#endif /* HANDLE_MULTIBYTE */
+++ /dev/null
-# This makefile for Readline library documentation is in -*- text -*- mode.
-# Emacs likes it that way.
-RM = rm -f
-
-MAKEINFO = makeinfo
-TEXI2DVI = texi2dvi
-TEXI2HTML = texi2html
-QUIETPS = #set this to -q to shut up dvips
-DVIPS = dvips -D 300 $(QUIETPS) -o $@ # tricky
-
-INSTALL_DATA = cp
-infodir = /usr/local/info
-
-RLSRC = rlman.texinfo rluser.texinfo rltech.texinfo
-HISTSRC = hist.texinfo hsuser.texinfo hstech.texinfo
-
-DVIOBJ = readline.dvi history.dvi
-INFOOBJ = readline.info history.info
-PSOBJ = readline.ps history.ps
-HTMLOBJ = readline.html history.html
-
-all: info dvi html ps
-nodvi: info html
-
-readline.dvi: $(RLSRC)
- $(TEXI2DVI) rlman.texinfo
- mv rlman.dvi readline.dvi
-
-readline.info: $(RLSRC)
- $(MAKEINFO) --no-split -o $@ rlman.texinfo
-
-history.dvi: ${HISTSRC}
- $(TEXI2DVI) hist.texinfo
- mv hist.dvi history.dvi
-
-history.info: ${HISTSRC}
- $(MAKEINFO) --no-split -o $@ hist.texinfo
-
-readline.ps: readline.dvi
- $(RM) $@
- $(DVIPS) readline.dvi
-
-history.ps: history.dvi
- $(RM) $@
- $(DVIPS) history.dvi
-
-readline.html: ${RLSRC}
- $(TEXI2HTML) rlman.texinfo
- sed -e 's:rlman.html:readline.html:' -e 's:rlman_toc.html:readline_toc.html:' rlman.html > readline.html
- sed -e 's:rlman.html:readline.html:' -e 's:rlman_toc.html:readline_toc.html:' rlman_toc.html > readline_toc.html
- $(RM) rlman.html rlman_toc.html
-
-history.html: ${HISTSRC}
- $(TEXI2HTML) hist.texinfo
- sed -e 's:hist.html:history.html:' -e 's:hist_toc.html:history_toc.html:' hist.html > history.html
- sed -e 's:hist.html:history.html:' -e 's:hist_toc.html:history_toc.html:' hist_toc.html > history_toc.html
- $(RM) hist.html hist_toc.html
-
-info: $(INFOOBJ)
-dvi: $(DVIOBJ)
-ps: $(PSOBJ)
-html: $(HTMLOBJ)
-
-clean:
- $(RM) *.aux *.cp *.fn *.ky *.log *.pg *.toc *.tp *.vr *.cps *.pgs \
- *.fns *.kys *.tps *.vrs *.o core
-
-distclean: clean
-mostlyclean: clean
-
-maintainer-clean: clean
- $(RM) *.dvi *.info *.info-* *.ps *.html
-
-install: info
- ${INSTALL_DATA} readline.info $(infodir)/readline.info
- ${INSTALL_DATA} history.info $(infodir)/history.info
+++ /dev/null
-.\"
-.\" MAN PAGE COMMENTS to
-.\"
-.\" Chet Ramey
-.\" Information Network Services
-.\" Case Western Reserve University
-.\" chet@ins.CWRU.Edu
-.\"
-.\" Last Change: Sat Aug 28 18:56:32 EDT 2010
-.\"
-.TH READLINE 3 "2010 August 28" "GNU Readline 6.2"
-.\"
-.\" File Name macro. This used to be `.PN', for Path Name,
-.\" but Sun doesn't seem to like that very much.
-.\"
-.de FN
-\fI\|\\$1\|\fP
-..
-.SH NAME
-readline \- get a line from a user with editing
-.SH SYNOPSIS
-.LP
-.nf
-.ft B
-#include <stdio.h>
-#include <readline/readline.h>
-#include <readline/history.h>
-.ft
-.fi
-.LP
-.nf
-\fIchar *\fP
-.br
-\fBreadline\fP (\fIconst char *prompt\fP);
-.fi
-.SH COPYRIGHT
-.if n Readline is Copyright (C) 1989\-2011 Free Software Foundation, Inc.
-.if t Readline is Copyright \(co 1989\-2011 Free Software Foundation, Inc.
-.SH DESCRIPTION
-.LP
-.B readline
-will read a line from the terminal
-and return it, using
-.B prompt
-as a prompt. If
-.B prompt
-is \fBNULL\fP or the empty string, no prompt is issued.
-The line returned is allocated with
-.IR malloc (3);
-the caller must free it when finished. The line returned
-has the final newline removed, so only the text of the line
-remains.
-.LP
-.B readline
-offers editing capabilities while the user is entering the
-line.
-By default, the line editing commands
-are similar to those of emacs.
-A vi\-style line editing interface is also available.
-.LP
-This manual page describes only the most basic use of \fBreadline\fP.
-Much more functionality is available; see
-\fIThe GNU Readline Library\fP and \fIThe GNU History Library\fP
-for additional information.
-.SH RETURN VALUE
-.LP
-.B readline
-returns the text of the line read. A blank line
-returns the empty string. If
-.B EOF
-is encountered while reading a line, and the line is empty,
-.B NULL
-is returned. If an
-.B EOF
-is read with a non\-empty line, it is
-treated as a newline.
-.SH NOTATION
-.LP
-An Emacs-style notation is used to denote
-keystrokes. Control keys are denoted by C\-\fIkey\fR, e.g., C\-n
-means Control\-N. Similarly,
-.I meta
-keys are denoted by M\-\fIkey\fR, so M\-x means Meta\-X. (On keyboards
-without a
-.I meta
-key, M\-\fIx\fP means ESC \fIx\fP, i.e., press the Escape key
-then the
-.I x
-key. This makes ESC the \fImeta prefix\fP.
-The combination M\-C\-\fIx\fP means ESC\-Control\-\fIx\fP,
-or press the Escape key
-then hold the Control key while pressing the
-.I x
-key.)
-.PP
-Readline commands may be given numeric
-.IR arguments ,
-which normally act as a repeat count. Sometimes, however, it is the
-sign of the argument that is significant. Passing a negative argument
-to a command that acts in the forward direction (e.g., \fBkill\-line\fP)
-causes that command to act in a backward direction. Commands whose
-behavior with arguments deviates from this are noted.
-.PP
-When a command is described as \fIkilling\fP text, the text
-deleted is saved for possible future retrieval
-(\fIyanking\fP). The killed text is saved in a
-\fIkill ring\fP. Consecutive kills cause the text to be
-accumulated into one unit, which can be yanked all at once.
-Commands which do not kill text separate the chunks of text
-on the kill ring.
-.SH INITIALIZATION FILE
-.LP
-Readline is customized by putting commands in an initialization
-file (the \fIinputrc\fP file).
-The name of this file is taken from the value of the
-.B INPUTRC
-environment variable. If that variable is unset, the default is
-.IR ~/.inputrc .
-If that file does not exist or cannot be read, the ultimate default is
-.IR /etc/inputrc .
-When a program which uses the readline library starts up, the
-init file is read, and the key bindings and variables are set.
-There are only a few basic constructs allowed in the
-readline init file. Blank lines are ignored.
-Lines beginning with a \fB#\fP are comments.
-Lines beginning with a \fB$\fP indicate conditional constructs.
-Other lines denote key bindings and variable settings.
-Each program using this library may add its own commands
-and bindings.
-.PP
-For example, placing
-.RS
-.PP
-M\-Control\-u: universal\-argument
-.RE
-or
-.RS
-C\-Meta\-u: universal\-argument
-.RE
-.sp
-into the
-.I inputrc
-would make M\-C\-u execute the readline command
-.IR universal\-argument .
-.PP
-The following symbolic character names are recognized while
-processing key bindings:
-.IR DEL ,
-.IR ESC ,
-.IR ESCAPE ,
-.IR LFD ,
-.IR NEWLINE ,
-.IR RET ,
-.IR RETURN ,
-.IR RUBOUT ,
-.IR SPACE ,
-.IR SPC ,
-and
-.IR TAB .
-.PP
-In addition to command names, readline allows keys to be bound
-to a string that is inserted when the key is pressed (a \fImacro\fP).
-.PP
-.SS Key Bindings
-.PP
-The syntax for controlling key bindings in the
-.I inputrc
-file is simple. All that is required is the name of the
-command or the text of a macro and a key sequence to which
-it should be bound. The name may be specified in one of two ways:
-as a symbolic key name, possibly with \fIMeta\-\fP or \fIControl\-\fP
-prefixes, or as a key sequence.
-The name and key sequence are separated by a colon. There can be no
-whitespace between the name and the colon.
-.PP
-When using the form \fBkeyname\fP:\^\fIfunction-name\fP or \fImacro\fP,
-.I keyname
-is the name of a key spelled out in English. For example:
-.sp
-.RS
-Control\-u: universal\-argument
-.br
-Meta\-Rubout: backward\-kill\-word
-.br
-Control\-o: "> output"
-.RE
-.LP
-In the above example,
-.I C\-u
-is bound to the function
-.BR universal\-argument ,
-.I M-DEL
-is bound to the function
-.BR backward\-kill\-word ,
-and
-.I C\-o
-is bound to run the macro
-expressed on the right hand side (that is, to insert the text
-.if t \f(CW> output\fP
-.if n ``> output''
-into the line).
-.PP
-In the second form, \fB"keyseq"\fP:\^\fIfunction\-name\fP or \fImacro\fP,
-.B keyseq
-differs from
-.B keyname
-above in that strings denoting
-an entire key sequence may be specified by placing the sequence
-within double quotes. Some GNU Emacs style key escapes can be
-used, as in the following example, but the symbolic character names
-are not recognized.
-.sp
-.RS
-"\eC\-u": universal\-argument
-.br
-"\eC\-x\eC\-r": re\-read\-init\-file
-.br
-"\ee[11~": "Function Key 1"
-.RE
-.PP
-In this example,
-.I C-u
-is again bound to the function
-.BR universal\-argument .
-.I "C-x C-r"
-is bound to the function
-.BR re\-read\-init\-file ,
-and
-.I "ESC [ 1 1 ~"
-is bound to insert the text
-.if t \f(CWFunction Key 1\fP.
-.if n ``Function Key 1''.
-.PP
-The full set of GNU Emacs style escape sequences available when specifying
-key sequences is
-.RS
-.PD 0
-.TP
-.B \eC\-
-control prefix
-.TP
-.B \eM\-
-meta prefix
-.TP
-.B \ee
-an escape character
-.TP
-.B \e\e
-backslash
-.TP
-.B \e"
-literal ", a double quote
-.TP
-.B \e'
-literal ', a single quote
-.RE
-.PD
-.PP
-In addition to the GNU Emacs style escape sequences, a second
-set of backslash escapes is available:
-.RS
-.PD 0
-.TP
-.B \ea
-alert (bell)
-.TP
-.B \eb
-backspace
-.TP
-.B \ed
-delete
-.TP
-.B \ef
-form feed
-.TP
-.B \en
-newline
-.TP
-.B \er
-carriage return
-.TP
-.B \et
-horizontal tab
-.TP
-.B \ev
-vertical tab
-.TP
-.B \e\fInnn\fP
-the eight-bit character whose value is the octal value \fInnn\fP
-(one to three digits)
-.TP
-.B \ex\fIHH\fP
-the eight-bit character whose value is the hexadecimal value \fIHH\fP
-(one or two hex digits)
-.RE
-.PD
-.PP
-When entering the text of a macro, single or double quotes should
-be used to indicate a macro definition. Unquoted text
-is assumed to be a function name.
-In the macro body, the backslash escapes described above are expanded.
-Backslash will quote any other character in the macro text,
-including " and '.
-.PP
-.B Bash
-allows the current readline key bindings to be displayed or modified
-with the
-.B bind
-builtin command. The editing mode may be switched during interactive
-use by using the
-.B \-o
-option to the
-.B set
-builtin command. Other programs using this library provide
-similar mechanisms. The
-.I inputrc
-file may be edited and re-read if a program does not provide
-any other means to incorporate new bindings.
-.SS Variables
-.PP
-Readline has variables that can be used to further customize its
-behavior. A variable may be set in the
-.I inputrc
-file with a statement of the form
-.RS
-.PP
-\fBset\fP \fIvariable\-name\fP \fIvalue\fP
-.RE
-.PP
-Except where noted, readline variables can take the values
-.B On
-or
-.B Off
-(without regard to case).
-Unrecognized variable names are ignored.
-When a variable value is read, empty or null values, "on" (case-insensitive),
-and "1" are equivalent to \fBOn\fP. All other values are equivalent to
-\fBOff\fP.
-The variables and their default values are:
-.PP
-.PD 0
-.TP
-.B bell\-style (audible)
-Controls what happens when readline wants to ring the terminal bell.
-If set to \fBnone\fP, readline never rings the bell. If set to
-\fBvisible\fP, readline uses a visible bell if one is available.
-If set to \fBaudible\fP, readline attempts to ring the terminal's bell.
-.TP
-.B bind\-tty\-special\-chars (On)
-If set to \fBOn\fP, readline attempts to bind the control characters
-treated specially by the kernel's terminal driver to their readline
-equivalents.
-.TP
-.B comment\-begin (``#'')
-The string that is inserted in \fBvi\fP mode when the
-.B insert\-comment
-command is executed.
-This command is bound to
-.B M\-#
-in emacs mode and to
-.B #
-in vi command mode.
-.TP
-.B completion\-display\-width (-1)
-The number of screen columns used to display possible matches
-when performing completion.
-The value is ignored if it is less than 0 or greater than the terminal
-screen width.
-A value of 0 will cause matches to be displayed one per line.
-The default value is -1.
-.TP
-.B completion\-ignore\-case (Off)
-If set to \fBOn\fP, readline performs filename matching and completion
-in a case\-insensitive fashion.
-.TP
-.B completion\-map\-case (Off)
-If set to \fBOn\fP, and \fBcompletion\-ignore\-case\fP is enabled, readline
-treats hyphens (\fI\-\fP) and underscores (\fI_\fP) as equivalent when
-performing case\-insensitive filename matching and completion.
-.TP
-.B completion\-prefix\-display\-length (0)
-The length in characters of the common prefix of a list of possible
-completions that is displayed without modification. When set to a
-value greater than zero, common prefixes longer than this value are
-replaced with an ellipsis when displaying possible completions.
-.TP
-.B completion\-query\-items (100)
-This determines when the user is queried about viewing
-the number of possible completions
-generated by the \fBpossible\-completions\fP command.
-It may be set to any integer value greater than or equal to
-zero. If the number of possible completions is greater than
-or equal to the value of this variable, the user is asked whether
-or not he wishes to view them; otherwise they are simply listed
-on the terminal. A negative value causes readline to never ask.
-.TP
-.B convert\-meta (On)
-If set to \fBOn\fP, readline will convert characters with the
-eighth bit set to an ASCII key sequence
-by stripping the eighth bit and prefixing it with an
-escape character (in effect, using escape as the \fImeta prefix\fP).
-.TP
-.B disable\-completion (Off)
-If set to \fBOn\fP, readline will inhibit word completion. Completion
-characters will be inserted into the line as if they had been
-mapped to \fBself-insert\fP.
-.TP
-.B editing\-mode (emacs)
-Controls whether readline begins with a set of key bindings similar
-to \fIEmacs\fP or \fIvi\fP.
-.B editing\-mode
-can be set to either
-.B emacs
-or
-.BR vi .
-.TP
-.B echo\-control\-characters (On)
-When set to \fBOn\fP, on operating systems that indicate they support it,
-readline echoes a character corresponding to a signal generated from the
-keyboard.
-.TP
-.B enable\-keypad (Off)
-When set to \fBOn\fP, readline will try to enable the application
-keypad when it is called. Some systems need this to enable the
-arrow keys.
-.TP
-.B enable\-meta\-key (On)
-When set to \fBOn\fP, readline will try to enable any meta modifier
-key the terminal claims to support when it is called. On many terminals,
-the meta key is used to send eight-bit characters.
-.TP
-.B expand\-tilde (Off)
-If set to \fBOn\fP, tilde expansion is performed when readline
-attempts word completion.
-.TP
-.B history\-preserve\-point (Off)
-If set to \fBOn\fP, the history code attempts to place point at the
-same location on each history line retrieved with \fBprevious-history\fP
-or \fBnext-history\fP.
-.TP
-.B history\-size (0)
-Set the maximum number of history entries saved in the history list. If
-set to zero, the number of entries in the history list is not limited.
-.TP
-.B horizontal\-scroll\-mode (Off)
-When set to \fBOn\fP, makes readline use a single line for display,
-scrolling the input horizontally on a single screen line when it
-becomes longer than the screen width rather than wrapping to a new line.
-.TP
-.B input\-meta (Off)
-If set to \fBOn\fP, readline will enable eight-bit input (that is,
-it will not clear the eighth bit in the characters it reads),
-regardless of what the terminal claims it can support. The name
-.B meta\-flag
-is a synonym for this variable.
-.TP
-.B isearch\-terminators (``C\-[ C\-J'')
-The string of characters that should terminate an incremental
-search without subsequently executing the character as a command.
-If this variable has not been given a value, the characters
-\fIESC\fP and \fIC\-J\fP will terminate an incremental search.
-.TP
-.B keymap (emacs)
-Set the current readline keymap. The set of legal keymap names is
-\fIemacs, emacs-standard, emacs-meta, emacs-ctlx, vi, vi-move,
-vi-command\fP, and
-.IR vi-insert .
-\fIvi\fP is equivalent to \fIvi-command\fP; \fIemacs\fP is
-equivalent to \fIemacs-standard\fP. The default value is
-.IR emacs .
-The value of
-.B editing\-mode
-also affects the default keymap.
-.TP
-.B mark\-directories (On)
-If set to \fBOn\fP, completed directory names have a slash
-appended.
-.TP
-.B mark\-modified\-lines (Off)
-If set to \fBOn\fP, history lines that have been modified are displayed
-with a preceding asterisk (\fB*\fP).
-.TP
-.B mark\-symlinked\-directories (Off)
-If set to \fBOn\fP, completed names which are symbolic links to directories
-have a slash appended (subject to the value of
-\fBmark\-directories\fP).
-.TP
-.B match\-hidden\-files (On)
-This variable, when set to \fBOn\fP, causes readline to match files whose
-names begin with a `.' (hidden files) when performing filename
-completion.
-If set to \fBOff\fP, the leading `.' must be
-supplied by the user in the filename to be completed.
-.TP
-.B menu\-complete\-display\-prefix (Off)
-If set to \fBOn\fP, menu completion displays the common prefix of the
-list of possible completions (which may be empty) before cycling through
-the list.
-.TP
-.B output\-meta (Off)
-If set to \fBOn\fP, readline will display characters with the
-eighth bit set directly rather than as a meta-prefixed escape
-sequence.
-.TP
-.B page\-completions (On)
-If set to \fBOn\fP, readline uses an internal \fImore\fP-like pager
-to display a screenful of possible completions at a time.
-.TP
-.B print\-completions\-horizontally (Off)
-If set to \fBOn\fP, readline will display completions with matches
-sorted horizontally in alphabetical order, rather than down the screen.
-.TP
-.B revert\-all\-at\-newline (Off)
-If set to \fBOn\fP, readline will undo all changes to history lines
-before returning when \fBaccept\-line\fP is executed. By default,
-history lines may be modified and retain individual undo lists across
-calls to \fBreadline\fP.
-.TP
-.B show\-all\-if\-ambiguous (Off)
-This alters the default behavior of the completion functions. If
-set to
-.BR On ,
-words which have more than one possible completion cause the
-matches to be listed immediately instead of ringing the bell.
-.TP
-.B show\-all\-if\-unmodified (Off)
-This alters the default behavior of the completion functions in
-a fashion similar to \fBshow\-all\-if\-ambiguous\fP.
-If set to
-.BR On ,
-words which have more than one possible completion without any
-possible partial completion (the possible completions don't share
-a common prefix) cause the matches to be listed immediately instead
-of ringing the bell.
-.TP
-.B skip\-completed\-text (Off)
-If set to \fBOn\fP, this alters the default completion behavior when
-inserting a single match into the line. It's only active when
-performing completion in the middle of a word. If enabled, readline
-does not insert characters from the completion that match characters
-after point in the word being completed, so portions of the word
-following the cursor are not duplicated.
-.TP
-.B visible\-stats (Off)
-If set to \fBOn\fP, a character denoting a file's type as reported
-by \fIstat\fP(2) is appended to the filename when listing possible
-completions.
-.PD
-.SS Conditional Constructs
-.PP
-Readline implements a facility similar in spirit to the conditional
-compilation features of the C preprocessor which allows key
-bindings and variable settings to be performed as the result
-of tests. There are four parser directives used.
-.IP \fB$if\fP
-The
-.B $if
-construct allows bindings to be made based on the
-editing mode, the terminal being used, or the application using
-readline. The text of the test extends to the end of the line;
-no characters are required to isolate it.
-.RS
-.IP \fBmode\fP
-The \fBmode=\fP form of the \fB$if\fP directive is used to test
-whether readline is in emacs or vi mode.
-This may be used in conjunction
-with the \fBset keymap\fP command, for instance, to set bindings in
-the \fIemacs-standard\fP and \fIemacs-ctlx\fP keymaps only if
-readline is starting out in emacs mode.
-.IP \fBterm\fP
-The \fBterm=\fP form may be used to include terminal-specific
-key bindings, perhaps to bind the key sequences output by the
-terminal's function keys. The word on the right side of the
-.B =
-is tested against the full name of the terminal and the portion
-of the terminal name before the first \fB\-\fP. This allows
-.I sun
-to match both
-.I sun
-and
-.IR sun\-cmd ,
-for instance.
-.IP \fBapplication\fP
-The \fBapplication\fP construct is used to include
-application-specific settings. Each program using the readline
-library sets the \fIapplication name\fP, and an initialization
-file can test for a particular value.
-This could be used to bind key sequences to functions useful for
-a specific program. For instance, the following command adds a
-key sequence that quotes the current or previous word in \fBbash\fP:
-.sp 1
-.RS
-.nf
-\fB$if\fP Bash
-# Quote the current or previous word
-"\eC-xq": "\eeb\e"\eef\e""
-\fB$endif\fP
-.fi
-.RE
-.RE
-.IP \fB$endif\fP
-This command, as seen in the previous example, terminates an
-\fB$if\fP command.
-.IP \fB$else\fP
-Commands in this branch of the \fB$if\fP directive are executed if
-the test fails.
-.IP \fB$include\fP
-This directive takes a single filename as an argument and reads commands
-and bindings from that file. For example, the following directive
-would read \fI/etc/inputrc\fP:
-.sp 1
-.RS
-.nf
-\fB$include\fP \^ \fI/etc/inputrc\fP
-.fi
-.RE
-.SH SEARCHING
-.PP
-Readline provides commands for searching through the command history
-for lines containing a specified string.
-There are two search modes:
-.I incremental
-and
-.IR non-incremental .
-.PP
-Incremental searches begin before the user has finished typing the
-search string.
-As each character of the search string is typed, readline displays
-the next entry from the history matching the string typed so far.
-An incremental search requires only as many characters as needed to
-find the desired history entry.
-To search backward in the history for a particular string, type
-\fBC\-r\fP. Typing \fBC\-s\fP searches forward through the history.
-The characters present in the value of the \fBisearch-terminators\fP
-variable are used to terminate an incremental search.
-If that variable has not been assigned a value the \fIEscape\fP and
-\fBC\-J\fP characters will terminate an incremental search.
-\fBC\-G\fP will abort an incremental search and restore the original
-line.
-When the search is terminated, the history entry containing the
-search string becomes the current line.
-.PP
-To find other matching entries in the history list, type \fBC\-s\fP or
-\fBC\-r\fP as appropriate.
-This will search backward or forward in the history for the next
-line matching the search string typed so far.
-Any other key sequence bound to a readline command will terminate
-the search and execute that command.
-For instance, a newline will terminate the search and accept
-the line, thereby executing the command from the history list.
-A movement command will terminate the search, make the last line found
-the current line, and begin editing.
-.PP
-Non-incremental searches read the entire search string before starting
-to search for matching history lines. The search string may be
-typed by the user or be part of the contents of the current line.
-.SH EDITING COMMANDS
-.PP
-The following is a list of the names of the commands and the default
-key sequences to which they are bound.
-Command names without an accompanying key sequence are unbound by default.
-.PP
-In the following descriptions, \fIpoint\fP refers to the current cursor
-position, and \fImark\fP refers to a cursor position saved by the
-\fBset\-mark\fP command.
-The text between the point and mark is referred to as the \fIregion\fP.
-.SS Commands for Moving
-.PP
-.PD 0
-.TP
-.B beginning\-of\-line (C\-a)
-Move to the start of the current line.
-.TP
-.B end\-of\-line (C\-e)
-Move to the end of the line.
-.TP
-.B forward\-char (C\-f)
-Move forward a character.
-.TP
-.B backward\-char (C\-b)
-Move back a character.
-.TP
-.B forward\-word (M\-f)
-Move forward to the end of the next word. Words are composed of
-alphanumeric characters (letters and digits).
-.TP
-.B backward\-word (M\-b)
-Move back to the start of the current or previous word. Words are
-composed of alphanumeric characters (letters and digits).
-.TP
-.B clear\-screen (C\-l)
-Clear the screen leaving the current line at the top of the screen.
-With an argument, refresh the current line without clearing the
-screen.
-.TP
-.B redraw\-current\-line
-Refresh the current line.
-.PD
-.SS Commands for Manipulating the History
-.PP
-.PD 0
-.TP
-.B accept\-line (Newline, Return)
-Accept the line regardless of where the cursor is.
-If this line is
-non-empty, it may be added to the history list for future recall with
-\fBadd_history()\fP.
-If the line is a modified history line, the history line is restored to its original state.
-.TP
-.B previous\-history (C\-p)
-Fetch the previous command from the history list, moving back in
-the list.
-.TP
-.B next\-history (C\-n)
-Fetch the next command from the history list, moving forward in the
-list.
-.TP
-.B beginning\-of\-history (M\-<)
-Move to the first line in the history.
-.TP
-.B end\-of\-history (M\->)
-Move to the end of the input history, i.e., the line currently being
-entered.
-.TP
-.B reverse\-search\-history (C\-r)
-Search backward starting at the current line and moving `up' through
-the history as necessary. This is an incremental search.
-.TP
-.B forward\-search\-history (C\-s)
-Search forward starting at the current line and moving `down' through
-the history as necessary. This is an incremental search.
-.TP
-.B non\-incremental\-reverse\-search\-history (M\-p)
-Search backward through the history starting at the current line
-using a non-incremental search for a string supplied by the user.
-.TP
-.B non\-incremental\-forward\-search\-history (M\-n)
-Search forward through the history using a non-incremental search
-for a string supplied by the user.
-.TP
-.B history\-search\-forward
-Search forward through the history for the string of characters
-between the start of the current line and the current cursor
-position (the \fIpoint\fP).
-This is a non-incremental search.
-.TP
-.B history\-search\-backward
-Search backward through the history for the string of characters
-between the start of the current line and the point.
-This is a non-incremental search.
-.TP
-.B yank\-nth\-arg (M\-C\-y)
-Insert the first argument to the previous command (usually
-the second word on the previous line) at point.
-With an argument
-.IR n ,
-insert the \fIn\fPth word from the previous command (the words
-in the previous command begin with word 0). A negative argument
-inserts the \fIn\fPth word from the end of the previous command.
-Once the argument \fIn\fP is computed, the argument is extracted
-as if the "!\fIn\fP" history expansion had been specified.
-.TP
-.B
-yank\-last\-arg (M\-.\^, M\-_\^)
-Insert the last argument to the previous command (the last word of
-the previous history entry).
-With a numeric argument, behave exactly like \fByank\-nth\-arg\fP.
-Successive calls to \fByank\-last\-arg\fP move back through the history
-list, inserting the last word (or the word specified by the argument to
-the first call) of each line in turn.
-Any numeric argument supplied to these successive calls determines
-the direction to move through the history. A negative argument switches
-the direction through the history (back or forward).
-The history expansion facilities are used to extract the last argument,
-as if the "!$" history expansion had been specified.
-.PD
-.SS Commands for Changing Text
-.PP
-.PD 0
-.TP
-.B delete\-char (C\-d)
-Delete the character at point. If point is at the
-beginning of the line, there are no characters in the line, and
-the last character typed was not bound to \fBdelete\-char\fP, then return
-.SM
-.BR EOF .
-.TP
-.B backward\-delete\-char (Rubout)
-Delete the character behind the cursor. When given a numeric argument,
-save the deleted text on the kill ring.
-.TP
-.B forward\-backward\-delete\-char
-Delete the character under the cursor, unless the cursor is at the
-end of the line, in which case the character behind the cursor is
-deleted.
-.TP
-.B quoted\-insert (C\-q, C\-v)
-Add the next character that you type to the line verbatim. This is
-how to insert characters like \fBC\-q\fP, for example.
-.TP
-.B tab\-insert (M-TAB)
-Insert a tab character.
-.TP
-.B self\-insert (a,\ b,\ A,\ 1,\ !,\ ...)
-Insert the character typed.
-.TP
-.B transpose\-chars (C\-t)
-Drag the character before point forward over the character at point,
-moving point forward as well.
-If point is at the end of the line, then this transposes
-the two characters before point.
-Negative arguments have no effect.
-.TP
-.B transpose\-words (M\-t)
-Drag the word before point past the word after point,
-moving point over that word as well.
-If point is at the end of the line, this transposes
-the last two words on the line.
-.TP
-.B upcase\-word (M\-u)
-Uppercase the current (or following) word. With a negative argument,
-uppercase the previous word, but do not move point.
-.TP
-.B downcase\-word (M\-l)
-Lowercase the current (or following) word. With a negative argument,
-lowercase the previous word, but do not move point.
-.TP
-.B capitalize\-word (M\-c)
-Capitalize the current (or following) word. With a negative argument,
-capitalize the previous word, but do not move point.
-.TP
-.B overwrite\-mode
-Toggle overwrite mode. With an explicit positive numeric argument,
-switches to overwrite mode. With an explicit non-positive numeric
-argument, switches to insert mode. This command affects only
-\fBemacs\fP mode; \fBvi\fP mode does overwrite differently.
-Each call to \fIreadline()\fP starts in insert mode.
-In overwrite mode, characters bound to \fBself\-insert\fP replace
-the text at point rather than pushing the text to the right.
-Characters bound to \fBbackward\-delete\-char\fP replace the character
-before point with a space. By default, this command is unbound.
-.PD
-.SS Killing and Yanking
-.PP
-.PD 0
-.TP
-.B kill\-line (C\-k)
-Kill the text from point to the end of the line.
-.TP
-.B backward\-kill\-line (C\-x Rubout)
-Kill backward to the beginning of the line.
-.TP
-.B unix\-line\-discard (C\-u)
-Kill backward from point to the beginning of the line.
-The killed text is saved on the kill-ring.
-.\" There is no real difference between this and backward-kill-line
-.TP
-.B kill\-whole\-line
-Kill all characters on the current line, no matter where point is.
-.TP
-.B kill\-word (M\-d)
-Kill from point the end of the current word, or if between
-words, to the end of the next word. Word boundaries are the same as
-those used by \fBforward\-word\fP.
-.TP
-.B backward\-kill\-word (M\-Rubout)
-Kill the word behind point.
-Word boundaries are the same as those used by \fBbackward\-word\fP.
-.TP
-.B unix\-word\-rubout (C\-w)
-Kill the word behind point, using white space as a word boundary.
-The killed text is saved on the kill-ring.
-.TP
-.B unix\-filename\-rubout
-Kill the word behind point, using white space and the slash character
-as the word boundaries.
-The killed text is saved on the kill-ring.
-.TP
-.B delete\-horizontal\-space (M\-\e)
-Delete all spaces and tabs around point.
-.TP
-.B kill\-region
-Kill the text between the point and \fImark\fP (saved cursor position).
-This text is referred to as the \fIregion\fP.
-.TP
-.B copy\-region\-as\-kill
-Copy the text in the region to the kill buffer.
-.TP
-.B copy\-backward\-word
-Copy the word before point to the kill buffer.
-The word boundaries are the same as \fBbackward\-word\fP.
-.TP
-.B copy\-forward\-word
-Copy the word following point to the kill buffer.
-The word boundaries are the same as \fBforward\-word\fP.
-.TP
-.B yank (C\-y)
-Yank the top of the kill ring into the buffer at point.
-.TP
-.B yank\-pop (M\-y)
-Rotate the kill ring, and yank the new top. Only works following
-.B yank
-or
-.BR yank\-pop .
-.PD
-.SS Numeric Arguments
-.PP
-.PD 0
-.TP
-.B digit\-argument (M\-0, M\-1, ..., M\-\-)
-Add this digit to the argument already accumulating, or start a new
-argument. M\-\- starts a negative argument.
-.TP
-.B universal\-argument
-This is another way to specify an argument.
-If this command is followed by one or more digits, optionally with a
-leading minus sign, those digits define the argument.
-If the command is followed by digits, executing
-.B universal\-argument
-again ends the numeric argument, but is otherwise ignored.
-As a special case, if this command is immediately followed by a
-character that is neither a digit or minus sign, the argument count
-for the next command is multiplied by four.
-The argument count is initially one, so executing this function the
-first time makes the argument count four, a second time makes the
-argument count sixteen, and so on.
-.PD
-.SS Completing
-.PP
-.PD 0
-.TP
-.B complete (TAB)
-Attempt to perform completion on the text before point.
-The actual completion performed is application-specific.
-.BR Bash ,
-for instance, attempts completion treating the text as a variable
-(if the text begins with \fB$\fP), username (if the text begins with
-\fB~\fP), hostname (if the text begins with \fB@\fP), or
-command (including aliases and functions) in turn. If none
-of these produces a match, filename completion is attempted.
-.BR Gdb ,
-on the other hand,
-allows completion of program functions and variables, and
-only attempts filename completion under certain circumstances.
-.TP
-.B possible\-completions (M\-?)
-List the possible completions of the text before point.
-When displaying completions, readline sets the number of columns used
-for display to the value of \fBcompletion-display-width\fP, the value of
-the environment variable
-.SM
-.BR COLUMNS ,
-or the screen width, in that order.
-.TP
-.B insert\-completions (M\-*)
-Insert all completions of the text before point
-that would have been generated by
-\fBpossible\-completions\fP.
-.TP
-.B menu\-complete
-Similar to \fBcomplete\fP, but replaces the word to be completed
-with a single match from the list of possible completions.
-Repeated execution of \fBmenu\-complete\fP steps through the list
-of possible completions, inserting each match in turn.
-At the end of the list of completions, the bell is rung
-(subject to the setting of \fBbell\-style\fP)
-and the original text is restored.
-An argument of \fIn\fP moves \fIn\fP positions forward in the list
-of matches; a negative argument may be used to move backward
-through the list.
-This command is intended to be bound to \fBTAB\fP, but is unbound
-by default.
-.TP
-.B menu\-complete\-backward
-Identical to \fBmenu\-complete\fP, but moves backward through the list
-of possible completions, as if \fBmenu\-complete\fP had been given a
-negative argument. This command is unbound by default.
-.TP
-.B delete\-char\-or\-list
-Deletes the character under the cursor if not at the beginning or
-end of the line (like \fBdelete-char\fP).
-If at the end of the line, behaves identically to
-\fBpossible-completions\fP.
-.PD
-.SS Keyboard Macros
-.PP
-.PD 0
-.TP
-.B start\-kbd\-macro (C\-x (\^)
-Begin saving the characters typed into the current keyboard macro.
-.TP
-.B end\-kbd\-macro (C\-x )\^)
-Stop saving the characters typed into the current keyboard macro
-and store the definition.
-.TP
-.B call\-last\-kbd\-macro (C\-x e)
-Re-execute the last keyboard macro defined, by making the characters
-in the macro appear as if typed at the keyboard.
-.PD
-.SS Miscellaneous
-.PP
-.PD 0
-.TP
-.B re\-read\-init\-file (C\-x C\-r)
-Read in the contents of the \fIinputrc\fP file, and incorporate
-any bindings or variable assignments found there.
-.TP
-.B abort (C\-g)
-Abort the current editing command and
-ring the terminal's bell (subject to the setting of
-.BR bell\-style ).
-.TP
-.B do\-uppercase\-version (M\-a, M\-b, M\-\fIx\fP, ...)
-If the metafied character \fIx\fP is lowercase, run the command
-that is bound to the corresponding uppercase character.
-.TP
-.B prefix\-meta (ESC)
-Metafy the next character typed.
-.SM
-.B ESC
-.B f
-is equivalent to
-.BR Meta\-f .
-.TP
-.B undo (C\-_, C\-x C\-u)
-Incremental undo, separately remembered for each line.
-.TP
-.B revert\-line (M\-r)
-Undo all changes made to this line. This is like executing the
-.B undo
-command enough times to return the line to its initial state.
-.TP
-.B tilde\-expand (M\-&)
-Perform tilde expansion on the current word.
-.TP
-.B set\-mark (C\-@, M\-<space>)
-Set the mark to the point. If a
-numeric argument is supplied, the mark is set to that position.
-.TP
-.B exchange\-point\-and\-mark (C\-x C\-x)
-Swap the point with the mark. The current cursor position is set to
-the saved position, and the old cursor position is saved as the mark.
-.TP
-.B character\-search (C\-])
-A character is read and point is moved to the next occurrence of that
-character. A negative count searches for previous occurrences.
-.TP
-.B character\-search\-backward (M\-C\-])
-A character is read and point is moved to the previous occurrence of that
-character. A negative count searches for subsequent occurrences.
-.TP
-.B skip\-csi\-sequence
-Read enough characters to consume a multi-key sequence such as those
-defined for keys like Home and End. Such sequences begin with a
-Control Sequence Indicator (CSI), usually ESC\-[. If this sequence is
-bound to "\e[", keys producing such sequences will have no effect
-unless explicitly bound to a readline command, instead of inserting
-stray characters into the editing buffer. This is unbound by default,
-but usually bound to ESC\-[.
-.TP
-.B insert\-comment (M\-#)
-Without a numeric argument, the value of the readline
-.B comment\-begin
-variable is inserted at the beginning of the current line.
-If a numeric argument is supplied, this command acts as a toggle: if
-the characters at the beginning of the line do not match the value
-of \fBcomment\-begin\fP, the value is inserted, otherwise
-the characters in \fBcomment-begin\fP are deleted from the beginning of
-the line.
-In either case, the line is accepted as if a newline had been typed.
-The default value of
-.B comment\-begin
-makes the current line a shell comment.
-If a numeric argument causes the comment character to be removed, the line
-will be executed by the shell.
-.TP
-.B dump\-functions
-Print all of the functions and their key bindings to the
-readline output stream. If a numeric argument is supplied,
-the output is formatted in such a way that it can be made part
-of an \fIinputrc\fP file.
-.TP
-.B dump\-variables
-Print all of the settable variables and their values to the
-readline output stream. If a numeric argument is supplied,
-the output is formatted in such a way that it can be made part
-of an \fIinputrc\fP file.
-.TP
-.B dump\-macros
-Print all of the readline key sequences bound to macros and the
-strings they output. If a numeric argument is supplied,
-the output is formatted in such a way that it can be made part
-of an \fIinputrc\fP file.
-.TP
-.B emacs\-editing\-mode (C\-e)
-When in
-.B vi
-command mode, this causes a switch to
-.B emacs
-editing mode.
-.TP
-.B vi\-editing\-mode (M\-C\-j)
-When in
-.B emacs
-editing mode, this causes a switch to
-.B vi
-editing mode.
-.PD
-.SH DEFAULT KEY BINDINGS
-.LP
-The following is a list of the default emacs and vi bindings.
-Characters with the eighth bit set are written as M\-<character>, and
-are referred to as
-.I metafied
-characters.
-The printable ASCII characters not mentioned in the list of emacs
-standard bindings are bound to the
-.B self\-insert
-function, which just inserts the given character into the input line.
-In vi insertion mode, all characters not specifically mentioned are
-bound to
-.BR self\-insert .
-Characters assigned to signal generation by
-.IR stty (1)
-or the terminal driver, such as C-Z or C-C,
-retain that function.
-Upper and lower case metafied characters are bound to the same function in
-the emacs mode meta keymap.
-The remaining characters are unbound, which causes readline
-to ring the bell (subject to the setting of the
-.B bell\-style
-variable).
-.SS Emacs Mode
-.RS +.6i
-.nf
-.ta 2.5i
-.sp
-Emacs Standard bindings
-.sp
-"C-@" set-mark
-"C-A" beginning-of-line
-"C-B" backward-char
-"C-D" delete-char
-"C-E" end-of-line
-"C-F" forward-char
-"C-G" abort
-"C-H" backward-delete-char
-"C-I" complete
-"C-J" accept-line
-"C-K" kill-line
-"C-L" clear-screen
-"C-M" accept-line
-"C-N" next-history
-"C-P" previous-history
-"C-Q" quoted-insert
-"C-R" reverse-search-history
-"C-S" forward-search-history
-"C-T" transpose-chars
-"C-U" unix-line-discard
-"C-V" quoted-insert
-"C-W" unix-word-rubout
-"C-Y" yank
-"C-]" character-search
-"C-_" undo
-"\^ " to "/" self-insert
-"0" to "9" self-insert
-":" to "~" self-insert
-"C-?" backward-delete-char
-.PP
-Emacs Meta bindings
-.sp
-"M-C-G" abort
-"M-C-H" backward-kill-word
-"M-C-I" tab-insert
-"M-C-J" vi-editing-mode
-"M-C-M" vi-editing-mode
-"M-C-R" revert-line
-"M-C-Y" yank-nth-arg
-"M-C-[" complete
-"M-C-]" character-search-backward
-"M-space" set-mark
-"M-#" insert-comment
-"M-&" tilde-expand
-"M-*" insert-completions
-"M--" digit-argument
-"M-." yank-last-arg
-"M-0" digit-argument
-"M-1" digit-argument
-"M-2" digit-argument
-"M-3" digit-argument
-"M-4" digit-argument
-"M-5" digit-argument
-"M-6" digit-argument
-"M-7" digit-argument
-"M-8" digit-argument
-"M-9" digit-argument
-"M-<" beginning-of-history
-"M-=" possible-completions
-"M->" end-of-history
-"M-?" possible-completions
-"M-B" backward-word
-"M-C" capitalize-word
-"M-D" kill-word
-"M-F" forward-word
-"M-L" downcase-word
-"M-N" non-incremental-forward-search-history
-"M-P" non-incremental-reverse-search-history
-"M-R" revert-line
-"M-T" transpose-words
-"M-U" upcase-word
-"M-Y" yank-pop
-"M-\e" delete-horizontal-space
-"M-~" tilde-expand
-"M-C-?" backward-kill-word
-"M-_" yank-last-arg
-.PP
-Emacs Control-X bindings
-.sp
-"C-XC-G" abort
-"C-XC-R" re-read-init-file
-"C-XC-U" undo
-"C-XC-X" exchange-point-and-mark
-"C-X(" start-kbd-macro
-"C-X)" end-kbd-macro
-"C-XE" call-last-kbd-macro
-"C-XC-?" backward-kill-line
-.sp
-.RE
-.SS VI Mode bindings
-.RS +.6i
-.nf
-.ta 2.5i
-.sp
-.PP
-VI Insert Mode functions
-.sp
-"C-D" vi-eof-maybe
-"C-H" backward-delete-char
-"C-I" complete
-"C-J" accept-line
-"C-M" accept-line
-"C-R" reverse-search-history
-"C-S" forward-search-history
-"C-T" transpose-chars
-"C-U" unix-line-discard
-"C-V" quoted-insert
-"C-W" unix-word-rubout
-"C-Y" yank
-"C-[" vi-movement-mode
-"C-_" undo
-"\^ " to "~" self-insert
-"C-?" backward-delete-char
-.PP
-VI Command Mode functions
-.sp
-"C-D" vi-eof-maybe
-"C-E" emacs-editing-mode
-"C-G" abort
-"C-H" backward-char
-"C-J" accept-line
-"C-K" kill-line
-"C-L" clear-screen
-"C-M" accept-line
-"C-N" next-history
-"C-P" previous-history
-"C-Q" quoted-insert
-"C-R" reverse-search-history
-"C-S" forward-search-history
-"C-T" transpose-chars
-"C-U" unix-line-discard
-"C-V" quoted-insert
-"C-W" unix-word-rubout
-"C-Y" yank
-"C-_" vi-undo
-"\^ " forward-char
-"#" insert-comment
-"$" end-of-line
-"%" vi-match
-"&" vi-tilde-expand
-"*" vi-complete
-"+" next-history
-"," vi-char-search
-"-" previous-history
-"." vi-redo
-"/" vi-search
-"0" beginning-of-line
-"1" to "9" vi-arg-digit
-";" vi-char-search
-"=" vi-complete
-"?" vi-search
-"A" vi-append-eol
-"B" vi-prev-word
-"C" vi-change-to
-"D" vi-delete-to
-"E" vi-end-word
-"F" vi-char-search
-"G" vi-fetch-history
-"I" vi-insert-beg
-"N" vi-search-again
-"P" vi-put
-"R" vi-replace
-"S" vi-subst
-"T" vi-char-search
-"U" revert-line
-"W" vi-next-word
-"X" backward-delete-char
-"Y" vi-yank-to
-"\e" vi-complete
-"^" vi-first-print
-"_" vi-yank-arg
-"`" vi-goto-mark
-"a" vi-append-mode
-"b" vi-prev-word
-"c" vi-change-to
-"d" vi-delete-to
-"e" vi-end-word
-"f" vi-char-search
-"h" backward-char
-"i" vi-insertion-mode
-"j" next-history
-"k" prev-history
-"l" forward-char
-"m" vi-set-mark
-"n" vi-search-again
-"p" vi-put
-"r" vi-change-char
-"s" vi-subst
-"t" vi-char-search
-"u" vi-undo
-"w" vi-next-word
-"x" vi-delete
-"y" vi-yank-to
-"|" vi-column
-"~" vi-change-case
-.RE
-.SH "SEE ALSO"
-.PD 0
-.TP
-\fIThe Gnu Readline Library\fP, Brian Fox and Chet Ramey
-.TP
-\fIThe Gnu History Library\fP, Brian Fox and Chet Ramey
-.TP
-\fIbash\fP(1)
-.PD
-.SH FILES
-.PD 0
-.TP
-.FN ~/.inputrc
-Individual \fBreadline\fP initialization file
-.PD
-.SH AUTHORS
-Brian Fox, Free Software Foundation
-.br
-bfox@gnu.org
-.PP
-Chet Ramey, Case Western Reserve University
-.br
-chet@ins.CWRU.Edu
-.SH BUG REPORTS
-If you find a bug in
-.B readline,
-you should report it. But first, you should
-make sure that it really is a bug, and that it appears in the latest
-version of the
-.B readline
-library that you have.
-.PP
-Once you have determined that a bug actually exists, mail a
-bug report to \fIbug\-readline\fP@\fIgnu.org\fP.
-If you have a fix, you are welcome to mail that
-as well! Suggestions and `philosophical' bug reports may be mailed
-to \fPbug-readline\fP@\fIgnu.org\fP or posted to the Usenet
-newsgroup
-.BR gnu.bash.bug .
-.PP
-Comments and bug reports concerning
-this manual page should be directed to
-.IR chet@ins.CWRU.Edu .
-.SH BUGS
-.PP
-It's too big and too slow.
+++ /dev/null
-@comment %**start of header (This is for running Texinfo on a region.)
-@setfilename rluser.info
-@comment %**end of header (This is for running Texinfo on a region.)
-
-@ignore
-This file documents the end user interface to the GNU command line
-editing features. It is to be an appendix to manuals for programs which
-use these features. There is a document entitled "readline.texinfo"
-which contains both end-user and programmer documentation for the
-GNU Readline Library.
-
-Copyright (C) 1988--2011 Free Software Foundation, Inc.
-
-Authored by Brian Fox and Chet Ramey.
-
-Permission is granted to process this file through Tex and print the
-results, provided the printed document carries copying permission notice
-identical to this one except for the removal of this paragraph (this
-paragraph not being relevant to the printed manual).
-
-Permission is granted to make and distribute verbatim copies of this manual
-provided the copyright notice and this permission notice are preserved on
-all copies.
-
-Permission is granted to copy and distribute modified versions of this
-manual under the conditions for verbatim copying, provided also that the
-GNU Copyright statement is available to the distributee, and provided that
-the entire resulting derived work is distributed under the terms of a
-permission notice identical to this one.
-
-Permission is granted to copy and distribute translations of this manual
-into another language, under the above conditions for modified versions.
-@end ignore
-
-@comment If you are including this manual as an appendix, then set the
-@comment variable readline-appendix.
-
-@ifclear BashFeatures
-@defcodeindex bt
-@end ifclear
-
-@node Command Line Editing
-@chapter Command Line Editing
-
-This chapter describes the basic features of the @sc{gnu}
-command line editing interface.
-@ifset BashFeatures
-Command line editing is provided by the Readline library, which is
-used by several different programs, including Bash.
-Command line editing is enabled by default when using an interactive shell,
-unless the @option{--noediting} option is supplied at shell invocation.
-Line editing is also used when using the @option{-e} option to the
-@code{read} builtin command (@pxref{Bash Builtins}).
-By default, the line editing commands are similar to those of Emacs.
-A vi-style line editing interface is also available.
-Line editing can be enabled at any time using the @option{-o emacs} or
-@option{-o vi} options to the @code{set} builtin command
-(@pxref{The Set Builtin}), or disabled using the @option{+o emacs} or
-@option{+o vi} options to @code{set}.
-@end ifset
-
-@menu
-* Introduction and Notation:: Notation used in this text.
-* Readline Interaction:: The minimum set of commands for editing a line.
-* Readline Init File:: Customizing Readline from a user's view.
-* Bindable Readline Commands:: A description of most of the Readline commands
- available for binding
-* Readline vi Mode:: A short description of how to make Readline
- behave like the vi editor.
-@ifset BashFeatures
-* Programmable Completion:: How to specify the possible completions for
- a specific command.
-* Programmable Completion Builtins:: Builtin commands to specify how to
- complete arguments for a particular command.
-@end ifset
-@end menu
-
-@node Introduction and Notation
-@section Introduction to Line Editing
-
-The following paragraphs describe the notation used to represent
-keystrokes.
-
-The text @kbd{C-k} is read as `Control-K' and describes the character
-produced when the @key{k} key is pressed while the Control key
-is depressed.
-
-The text @kbd{M-k} is read as `Meta-K' and describes the character
-produced when the Meta key (if you have one) is depressed, and the @key{k}
-key is pressed.
-The Meta key is labeled @key{ALT} on many keyboards.
-On keyboards with two keys labeled @key{ALT} (usually to either side of
-the space bar), the @key{ALT} on the left side is generally set to
-work as a Meta key.
-The @key{ALT} key on the right may also be configured to work as a
-Meta key or may be configured as some other modifier, such as a
-Compose key for typing accented characters.
-
-If you do not have a Meta or @key{ALT} key, or another key working as
-a Meta key, the identical keystroke can be generated by typing @key{ESC}
-@emph{first}, and then typing @key{k}.
-Either process is known as @dfn{metafying} the @key{k} key.
-
-The text @kbd{M-C-k} is read as `Meta-Control-k' and describes the
-character produced by @dfn{metafying} @kbd{C-k}.
-
-In addition, several keys have their own names. Specifically,
-@key{DEL}, @key{ESC}, @key{LFD}, @key{SPC}, @key{RET}, and @key{TAB} all
-stand for themselves when seen in this text, or in an init file
-(@pxref{Readline Init File}).
-If your keyboard lacks a @key{LFD} key, typing @key{C-j} will
-produce the desired character.
-The @key{RET} key may be labeled @key{Return} or @key{Enter} on
-some keyboards.
-
-@node Readline Interaction
-@section Readline Interaction
-@cindex interaction, readline
-
-Often during an interactive session you type in a long line of text,
-only to notice that the first word on the line is misspelled. The
-Readline library gives you a set of commands for manipulating the text
-as you type it in, allowing you to just fix your typo, and not forcing
-you to retype the majority of the line. Using these editing commands,
-you move the cursor to the place that needs correction, and delete or
-insert the text of the corrections. Then, when you are satisfied with
-the line, you simply press @key{RET}. You do not have to be at the
-end of the line to press @key{RET}; the entire line is accepted
-regardless of the location of the cursor within the line.
-
-@menu
-* Readline Bare Essentials:: The least you need to know about Readline.
-* Readline Movement Commands:: Moving about the input line.
-* Readline Killing Commands:: How to delete text, and how to get it back!
-* Readline Arguments:: Giving numeric arguments to commands.
-* Searching:: Searching through previous lines.
-@end menu
-
-@node Readline Bare Essentials
-@subsection Readline Bare Essentials
-@cindex notation, readline
-@cindex command editing
-@cindex editing command lines
-
-In order to enter characters into the line, simply type them. The typed
-character appears where the cursor was, and then the cursor moves one
-space to the right. If you mistype a character, you can use your
-erase character to back up and delete the mistyped character.
-
-Sometimes you may mistype a character, and
-not notice the error until you have typed several other characters. In
-that case, you can type @kbd{C-b} to move the cursor to the left, and then
-correct your mistake. Afterwards, you can move the cursor to the right
-with @kbd{C-f}.
-
-When you add text in the middle of a line, you will notice that characters
-to the right of the cursor are `pushed over' to make room for the text
-that you have inserted. Likewise, when you delete text behind the cursor,
-characters to the right of the cursor are `pulled back' to fill in the
-blank space created by the removal of the text. A list of the bare
-essentials for editing the text of an input line follows.
-
-@table @asis
-@item @kbd{C-b}
-Move back one character.
-@item @kbd{C-f}
-Move forward one character.
-@item @key{DEL} or @key{Backspace}
-Delete the character to the left of the cursor.
-@item @kbd{C-d}
-Delete the character underneath the cursor.
-@item @w{Printing characters}
-Insert the character into the line at the cursor.
-@item @kbd{C-_} or @kbd{C-x C-u}
-Undo the last editing command. You can undo all the way back to an
-empty line.
-@end table
-
-@noindent
-(Depending on your configuration, the @key{Backspace} key be set to
-delete the character to the left of the cursor and the @key{DEL} key set
-to delete the character underneath the cursor, like @kbd{C-d}, rather
-than the character to the left of the cursor.)
-
-@node Readline Movement Commands
-@subsection Readline Movement Commands
-
-
-The above table describes the most basic keystrokes that you need
-in order to do editing of the input line. For your convenience, many
-other commands have been added in addition to @kbd{C-b}, @kbd{C-f},
-@kbd{C-d}, and @key{DEL}. Here are some commands for moving more rapidly
-about the line.
-
-@table @kbd
-@item C-a
-Move to the start of the line.
-@item C-e
-Move to the end of the line.
-@item M-f
-Move forward a word, where a word is composed of letters and digits.
-@item M-b
-Move backward a word.
-@item C-l
-Clear the screen, reprinting the current line at the top.
-@end table
-
-Notice how @kbd{C-f} moves forward a character, while @kbd{M-f} moves
-forward a word. It is a loose convention that control keystrokes
-operate on characters while meta keystrokes operate on words.
-
-@node Readline Killing Commands
-@subsection Readline Killing Commands
-
-@cindex killing text
-@cindex yanking text
-
-@dfn{Killing} text means to delete the text from the line, but to save
-it away for later use, usually by @dfn{yanking} (re-inserting)
-it back into the line.
-(`Cut' and `paste' are more recent jargon for `kill' and `yank'.)
-
-If the description for a command says that it `kills' text, then you can
-be sure that you can get the text back in a different (or the same)
-place later.
-
-When you use a kill command, the text is saved in a @dfn{kill-ring}.
-Any number of consecutive kills save all of the killed text together, so
-that when you yank it back, you get it all. The kill
-ring is not line specific; the text that you killed on a previously
-typed line is available to be yanked back later, when you are typing
-another line.
-@cindex kill ring
-
-Here is the list of commands for killing text.
-
-@table @kbd
-@item C-k
-Kill the text from the current cursor position to the end of the line.
-
-@item M-d
-Kill from the cursor to the end of the current word, or, if between
-words, to the end of the next word.
-Word boundaries are the same as those used by @kbd{M-f}.
-
-@item M-@key{DEL}
-Kill from the cursor the start of the current word, or, if between
-words, to the start of the previous word.
-Word boundaries are the same as those used by @kbd{M-b}.
-
-@item C-w
-Kill from the cursor to the previous whitespace. This is different than
-@kbd{M-@key{DEL}} because the word boundaries differ.
-
-@end table
-
-Here is how to @dfn{yank} the text back into the line. Yanking
-means to copy the most-recently-killed text from the kill buffer.
-
-@table @kbd
-@item C-y
-Yank the most recently killed text back into the buffer at the cursor.
-
-@item M-y
-Rotate the kill-ring, and yank the new top. You can only do this if
-the prior command is @kbd{C-y} or @kbd{M-y}.
-@end table
-
-@node Readline Arguments
-@subsection Readline Arguments
-
-You can pass numeric arguments to Readline commands. Sometimes the
-argument acts as a repeat count, other times it is the @i{sign} of the
-argument that is significant. If you pass a negative argument to a
-command which normally acts in a forward direction, that command will
-act in a backward direction. For example, to kill text back to the
-start of the line, you might type @samp{M-- C-k}.
-
-The general way to pass numeric arguments to a command is to type meta
-digits before the command. If the first `digit' typed is a minus
-sign (@samp{-}), then the sign of the argument will be negative. Once
-you have typed one meta digit to get the argument started, you can type
-the remainder of the digits, and then the command. For example, to give
-the @kbd{C-d} command an argument of 10, you could type @samp{M-1 0 C-d},
-which will delete the next ten characters on the input line.
-
-@node Searching
-@subsection Searching for Commands in the History
-
-Readline provides commands for searching through the command history
-@ifset BashFeatures
-(@pxref{Bash History Facilities})
-@end ifset
-for lines containing a specified string.
-There are two search modes: @dfn{incremental} and @dfn{non-incremental}.
-
-Incremental searches begin before the user has finished typing the
-search string.
-As each character of the search string is typed, Readline displays
-the next entry from the history matching the string typed so far.
-An incremental search requires only as many characters as needed to
-find the desired history entry.
-To search backward in the history for a particular string, type
-@kbd{C-r}. Typing @kbd{C-s} searches forward through the history.
-The characters present in the value of the @code{isearch-terminators} variable
-are used to terminate an incremental search.
-If that variable has not been assigned a value, the @key{ESC} and
-@kbd{C-J} characters will terminate an incremental search.
-@kbd{C-g} will abort an incremental search and restore the original line.
-When the search is terminated, the history entry containing the
-search string becomes the current line.
-
-To find other matching entries in the history list, type @kbd{C-r} or
-@kbd{C-s} as appropriate.
-This will search backward or forward in the history for the next
-entry matching the search string typed so far.
-Any other key sequence bound to a Readline command will terminate
-the search and execute that command.
-For instance, a @key{RET} will terminate the search and accept
-the line, thereby executing the command from the history list.
-A movement command will terminate the search, make the last line found
-the current line, and begin editing.
-
-Readline remembers the last incremental search string. If two
-@kbd{C-r}s are typed without any intervening characters defining a new
-search string, any remembered search string is used.
-
-Non-incremental searches read the entire search string before starting
-to search for matching history lines. The search string may be
-typed by the user or be part of the contents of the current line.
-
-@node Readline Init File
-@section Readline Init File
-@cindex initialization file, readline
-
-Although the Readline library comes with a set of Emacs-like
-keybindings installed by default, it is possible to use a different set
-of keybindings.
-Any user can customize programs that use Readline by putting
-commands in an @dfn{inputrc} file, conventionally in his home directory.
-The name of this
-@ifset BashFeatures
-file is taken from the value of the shell variable @env{INPUTRC}. If
-@end ifset
-@ifclear BashFeatures
-file is taken from the value of the environment variable @env{INPUTRC}. If
-@end ifclear
-that variable is unset, the default is @file{~/.inputrc}. If that
-file does not exist or cannot be read, the ultimate default is
-@file{/etc/inputrc}.
-
-When a program which uses the Readline library starts up, the
-init file is read, and the key bindings are set.
-
-In addition, the @code{C-x C-r} command re-reads this init file, thus
-incorporating any changes that you might have made to it.
-
-@menu
-* Readline Init File Syntax:: Syntax for the commands in the inputrc file.
-
-* Conditional Init Constructs:: Conditional key bindings in the inputrc file.
-
-* Sample Init File:: An example inputrc file.
-@end menu
-
-@node Readline Init File Syntax
-@subsection Readline Init File Syntax
-
-There are only a few basic constructs allowed in the
-Readline init file. Blank lines are ignored.
-Lines beginning with a @samp{#} are comments.
-Lines beginning with a @samp{$} indicate conditional
-constructs (@pxref{Conditional Init Constructs}). Other lines
-denote variable settings and key bindings.
-
-@table @asis
-@item Variable Settings
-You can modify the run-time behavior of Readline by
-altering the values of variables in Readline
-using the @code{set} command within the init file.
-The syntax is simple:
-
-@example
-set @var{variable} @var{value}
-@end example
-
-@noindent
-Here, for example, is how to
-change from the default Emacs-like key binding to use
-@code{vi} line editing commands:
-
-@example
-set editing-mode vi
-@end example
-
-Variable names and values, where appropriate, are recognized without regard
-to case. Unrecognized variable names are ignored.
-
-Boolean variables (those that can be set to on or off) are set to on if
-the value is null or empty, @var{on} (case-insensitive), or 1. Any other
-value results in the variable being set to off.
-
-@ifset BashFeatures
-The @w{@code{bind -V}} command lists the current Readline variable names
-and values. @xref{Bash Builtins}.
-@end ifset
-
-A great deal of run-time behavior is changeable with the following
-variables.
-
-@cindex variables, readline
-@table @code
-
-@item bell-style
-@vindex bell-style
-Controls what happens when Readline wants to ring the terminal bell.
-If set to @samp{none}, Readline never rings the bell. If set to
-@samp{visible}, Readline uses a visible bell if one is available.
-If set to @samp{audible} (the default), Readline attempts to ring
-the terminal's bell.
-
-@item bind-tty-special-chars
-@vindex bind-tty-special-chars
-If set to @samp{on}, Readline attempts to bind the control characters
-treated specially by the kernel's terminal driver to their Readline
-equivalents.
-
-@item comment-begin
-@vindex comment-begin
-The string to insert at the beginning of the line when the
-@code{insert-comment} command is executed. The default value
-is @code{"#"}.
-
-@item completion-display-width
-@vindex completion-display-width
-The number of screen columns used to display possible matches
-when performing completion.
-The value is ignored if it is less than 0 or greater than the terminal
-screen width.
-A value of 0 will cause matches to be displayed one per line.
-The default value is -1.
-
-@item completion-ignore-case
-@vindex completion-ignore-case
-If set to @samp{on}, Readline performs filename matching and completion
-in a case-insensitive fashion.
-The default value is @samp{off}.
-
-@item completion-map-case
-@vindex completion-map-case
-If set to @samp{on}, and @var{completion-ignore-case} is enabled, Readline
-treats hyphens (@samp{-}) and underscores (@samp{_}) as equivalent when
-performing case-insensitive filename matching and completion.
-
-@item completion-prefix-display-length
-@vindex completion-prefix-display-length
-The length in characters of the common prefix of a list of possible
-completions that is displayed without modification. When set to a
-value greater than zero, common prefixes longer than this value are
-replaced with an ellipsis when displaying possible completions.
-
-@item completion-query-items
-@vindex completion-query-items
-The number of possible completions that determines when the user is
-asked whether the list of possibilities should be displayed.
-If the number of possible completions is greater than this value,
-Readline will ask the user whether or not he wishes to view
-them; otherwise, they are simply listed.
-This variable must be set to an integer value greater than or equal to 0.
-A negative value means Readline should never ask.
-The default limit is @code{100}.
-
-@item convert-meta
-@vindex convert-meta
-If set to @samp{on}, Readline will convert characters with the
-eighth bit set to an @sc{ascii} key sequence by stripping the eighth
-bit and prefixing an @key{ESC} character, converting them to a
-meta-prefixed key sequence. The default value is @samp{on}.
-
-@item disable-completion
-@vindex disable-completion
-If set to @samp{On}, Readline will inhibit word completion.
-Completion characters will be inserted into the line as if they had
-been mapped to @code{self-insert}. The default is @samp{off}.
-
-@item editing-mode
-@vindex editing-mode
-The @code{editing-mode} variable controls which default set of
-key bindings is used. By default, Readline starts up in Emacs editing
-mode, where the keystrokes are most similar to Emacs. This variable can be
-set to either @samp{emacs} or @samp{vi}.
-
-@item echo-control-characters
-When set to @samp{on}, on operating systems that indicate they support it,
-readline echoes a character corresponding to a signal generated from the
-keyboard. The default is @samp{on}.
-
-@item enable-keypad
-@vindex enable-keypad
-When set to @samp{on}, Readline will try to enable the application
-keypad when it is called. Some systems need this to enable the
-arrow keys. The default is @samp{off}.
-
-@item enable-meta-key
-When set to @samp{on}, Readline will try to enable any meta modifier
-key the terminal claims to support when it is called. On many terminals,
-the meta key is used to send eight-bit characters.
-The default is @samp{on}.
-
-@item expand-tilde
-@vindex expand-tilde
-If set to @samp{on}, tilde expansion is performed when Readline
-attempts word completion. The default is @samp{off}.
-
-@item history-preserve-point
-@vindex history-preserve-point
-If set to @samp{on}, the history code attempts to place the point (the
-current cursor position) at the
-same location on each history line retrieved with @code{previous-history}
-or @code{next-history}. The default is @samp{off}.
-
-@item history-size
-@vindex history-size
-Set the maximum number of history entries saved in the history list. If
-set to zero, the number of entries in the history list is not limited.
-
-@item horizontal-scroll-mode
-@vindex horizontal-scroll-mode
-This variable can be set to either @samp{on} or @samp{off}. Setting it
-to @samp{on} means that the text of the lines being edited will scroll
-horizontally on a single screen line when they are longer than the width
-of the screen, instead of wrapping onto a new screen line. By default,
-this variable is set to @samp{off}.
-
-@item input-meta
-@vindex input-meta
-@vindex meta-flag
-If set to @samp{on}, Readline will enable eight-bit input (it
-will not clear the eighth bit in the characters it reads),
-regardless of what the terminal claims it can support. The
-default value is @samp{off}. The name @code{meta-flag} is a
-synonym for this variable.
-
-@item isearch-terminators
-@vindex isearch-terminators
-The string of characters that should terminate an incremental search without
-subsequently executing the character as a command (@pxref{Searching}).
-If this variable has not been given a value, the characters @key{ESC} and
-@kbd{C-J} will terminate an incremental search.
-
-@item keymap
-@vindex keymap
-Sets Readline's idea of the current keymap for key binding commands.
-Acceptable @code{keymap} names are
-@code{emacs},
-@code{emacs-standard},
-@code{emacs-meta},
-@code{emacs-ctlx},
-@code{vi},
-@code{vi-move},
-@code{vi-command}, and
-@code{vi-insert}.
-@code{vi} is equivalent to @code{vi-command}; @code{emacs} is
-equivalent to @code{emacs-standard}. The default value is @code{emacs}.
-The value of the @code{editing-mode} variable also affects the
-default keymap.
-
-@item mark-directories
-If set to @samp{on}, completed directory names have a slash
-appended. The default is @samp{on}.
-
-@item mark-modified-lines
-@vindex mark-modified-lines
-This variable, when set to @samp{on}, causes Readline to display an
-asterisk (@samp{*}) at the start of history lines which have been modified.
-This variable is @samp{off} by default.
-
-@item mark-symlinked-directories
-@vindex mark-symlinked-directories
-If set to @samp{on}, completed names which are symbolic links
-to directories have a slash appended (subject to the value of
-@code{mark-directories}).
-The default is @samp{off}.
-
-@item match-hidden-files
-@vindex match-hidden-files
-This variable, when set to @samp{on}, causes Readline to match files whose
-names begin with a @samp{.} (hidden files) when performing filename
-completion.
-If set to @samp{off}, the leading @samp{.} must be
-supplied by the user in the filename to be completed.
-This variable is @samp{on} by default.
-
-@item menu-complete-display-prefix
-@vindex menu-complete-display-prefix
-If set to @samp{on}, menu completion displays the common prefix of the
-list of possible completions (which may be empty) before cycling through
-the list. The default is @samp{off}.
-
-@item output-meta
-@vindex output-meta
-If set to @samp{on}, Readline will display characters with the
-eighth bit set directly rather than as a meta-prefixed escape
-sequence. The default is @samp{off}.
-
-@item page-completions
-@vindex page-completions
-If set to @samp{on}, Readline uses an internal @code{more}-like pager
-to display a screenful of possible completions at a time.
-This variable is @samp{on} by default.
-
-@item print-completions-horizontally
-If set to @samp{on}, Readline will display completions with matches
-sorted horizontally in alphabetical order, rather than down the screen.
-The default is @samp{off}.
-
-@item revert-all-at-newline
-@vindex revert-all-at-newline
-If set to @samp{on}, Readline will undo all changes to history lines
-before returning when @code{accept-line} is executed. By default,
-history lines may be modified and retain individual undo lists across
-calls to @code{readline}. The default is @samp{off}.
-
-@item show-all-if-ambiguous
-@vindex show-all-if-ambiguous
-This alters the default behavior of the completion functions. If
-set to @samp{on},
-words which have more than one possible completion cause the
-matches to be listed immediately instead of ringing the bell.
-The default value is @samp{off}.
-
-@item show-all-if-unmodified
-@vindex show-all-if-unmodified
-This alters the default behavior of the completion functions in
-a fashion similar to @var{show-all-if-ambiguous}.
-If set to @samp{on},
-words which have more than one possible completion without any
-possible partial completion (the possible completions don't share
-a common prefix) cause the matches to be listed immediately instead
-of ringing the bell.
-The default value is @samp{off}.
-
-@item skip-completed-text
-@vindex skip-completed-text
-If set to @samp{on}, this alters the default completion behavior when
-inserting a single match into the line. It's only active when
-performing completion in the middle of a word. If enabled, readline
-does not insert characters from the completion that match characters
-after point in the word being completed, so portions of the word
-following the cursor are not duplicated.
-For instance, if this is enabled, attempting completion when the cursor
-is after the @samp{e} in @samp{Makefile} will result in @samp{Makefile}
-rather than @samp{Makefilefile}, assuming there is a single possible
-completion.
-The default value is @samp{off}.
-
-@item visible-stats
-@vindex visible-stats
-If set to @samp{on}, a character denoting a file's type
-is appended to the filename when listing possible
-completions. The default is @samp{off}.
-
-@end table
-
-@item Key Bindings
-The syntax for controlling key bindings in the init file is
-simple. First you need to find the name of the command that you
-want to change. The following sections contain tables of the command
-name, the default keybinding, if any, and a short description of what
-the command does.
-
-Once you know the name of the command, simply place on a line
-in the init file the name of the key
-you wish to bind the command to, a colon, and then the name of the
-command.
-There can be no space between the key name and the colon -- that will be
-interpreted as part of the key name.
-The name of the key can be expressed in different ways, depending on
-what you find most comfortable.
-
-In addition to command names, readline allows keys to be bound
-to a string that is inserted when the key is pressed (a @var{macro}).
-
-@ifset BashFeatures
-The @w{@code{bind -p}} command displays Readline function names and
-bindings in a format that can put directly into an initialization file.
-@xref{Bash Builtins}.
-@end ifset
-
-@table @asis
-@item @w{@var{keyname}: @var{function-name} or @var{macro}}
-@var{keyname} is the name of a key spelled out in English. For example:
-@example
-Control-u: universal-argument
-Meta-Rubout: backward-kill-word
-Control-o: "> output"
-@end example
-
-In the above example, @kbd{C-u} is bound to the function
-@code{universal-argument},
-@kbd{M-DEL} is bound to the function @code{backward-kill-word}, and
-@kbd{C-o} is bound to run the macro
-expressed on the right hand side (that is, to insert the text
-@samp{> output} into the line).
-
-A number of symbolic character names are recognized while
-processing this key binding syntax:
-@var{DEL},
-@var{ESC},
-@var{ESCAPE},
-@var{LFD},
-@var{NEWLINE},
-@var{RET},
-@var{RETURN},
-@var{RUBOUT},
-@var{SPACE},
-@var{SPC},
-and
-@var{TAB}.
-
-@item @w{"@var{keyseq}": @var{function-name} or @var{macro}}
-@var{keyseq} differs from @var{keyname} above in that strings
-denoting an entire key sequence can be specified, by placing
-the key sequence in double quotes. Some @sc{gnu} Emacs style key
-escapes can be used, as in the following example, but the
-special character names are not recognized.
-
-@example
-"\C-u": universal-argument
-"\C-x\C-r": re-read-init-file
-"\e[11~": "Function Key 1"
-@end example
-
-In the above example, @kbd{C-u} is again bound to the function
-@code{universal-argument} (just as it was in the first example),
-@samp{@kbd{C-x} @kbd{C-r}} is bound to the function @code{re-read-init-file},
-and @samp{@key{ESC} @key{[} @key{1} @key{1} @key{~}} is bound to insert
-the text @samp{Function Key 1}.
-
-@end table
-
-The following @sc{gnu} Emacs style escape sequences are available when
-specifying key sequences:
-
-@table @code
-@item @kbd{\C-}
-control prefix
-@item @kbd{\M-}
-meta prefix
-@item @kbd{\e}
-an escape character
-@item @kbd{\\}
-backslash
-@item @kbd{\"}
-@key{"}, a double quotation mark
-@item @kbd{\'}
-@key{'}, a single quote or apostrophe
-@end table
-
-In addition to the @sc{gnu} Emacs style escape sequences, a second
-set of backslash escapes is available:
-
-@table @code
-@item \a
-alert (bell)
-@item \b
-backspace
-@item \d
-delete
-@item \f
-form feed
-@item \n
-newline
-@item \r
-carriage return
-@item \t
-horizontal tab
-@item \v
-vertical tab
-@item \@var{nnn}
-the eight-bit character whose value is the octal value @var{nnn}
-(one to three digits)
-@item \x@var{HH}
-the eight-bit character whose value is the hexadecimal value @var{HH}
-(one or two hex digits)
-@end table
-
-When entering the text of a macro, single or double quotes must
-be used to indicate a macro definition.
-Unquoted text is assumed to be a function name.
-In the macro body, the backslash escapes described above are expanded.
-Backslash will quote any other character in the macro text,
-including @samp{"} and @samp{'}.
-For example, the following binding will make @samp{@kbd{C-x} \}
-insert a single @samp{\} into the line:
-@example
-"\C-x\\": "\\"
-@end example
-
-@end table
-
-@node Conditional Init Constructs
-@subsection Conditional Init Constructs
-
-Readline implements a facility similar in spirit to the conditional
-compilation features of the C preprocessor which allows key
-bindings and variable settings to be performed as the result
-of tests. There are four parser directives used.
-
-@table @code
-@item $if
-The @code{$if} construct allows bindings to be made based on the
-editing mode, the terminal being used, or the application using
-Readline. The text of the test extends to the end of the line;
-no characters are required to isolate it.
-
-@table @code
-@item mode
-The @code{mode=} form of the @code{$if} directive is used to test
-whether Readline is in @code{emacs} or @code{vi} mode.
-This may be used in conjunction
-with the @samp{set keymap} command, for instance, to set bindings in
-the @code{emacs-standard} and @code{emacs-ctlx} keymaps only if
-Readline is starting out in @code{emacs} mode.
-
-@item term
-The @code{term=} form may be used to include terminal-specific
-key bindings, perhaps to bind the key sequences output by the
-terminal's function keys. The word on the right side of the
-@samp{=} is tested against both the full name of the terminal and
-the portion of the terminal name before the first @samp{-}. This
-allows @code{sun} to match both @code{sun} and @code{sun-cmd},
-for instance.
-
-@item application
-The @var{application} construct is used to include
-application-specific settings. Each program using the Readline
-library sets the @var{application name}, and you can test for
-a particular value.
-This could be used to bind key sequences to functions useful for
-a specific program. For instance, the following command adds a
-key sequence that quotes the current or previous word in Bash:
-@example
-$if Bash
-# Quote the current or previous word
-"\C-xq": "\eb\"\ef\""
-$endif
-@end example
-@end table
-
-@item $endif
-This command, as seen in the previous example, terminates an
-@code{$if} command.
-
-@item $else
-Commands in this branch of the @code{$if} directive are executed if
-the test fails.
-
-@item $include
-This directive takes a single filename as an argument and reads commands
-and bindings from that file.
-For example, the following directive reads from @file{/etc/inputrc}:
-@example
-$include /etc/inputrc
-@end example
-@end table
-
-@node Sample Init File
-@subsection Sample Init File
-
-Here is an example of an @var{inputrc} file. This illustrates key
-binding, variable assignment, and conditional syntax.
-
-@example
-@page
-# This file controls the behaviour of line input editing for
-# programs that use the GNU Readline library. Existing
-# programs include FTP, Bash, and GDB.
-#
-# You can re-read the inputrc file with C-x C-r.
-# Lines beginning with '#' are comments.
-#
-# First, include any systemwide bindings and variable
-# assignments from /etc/Inputrc
-$include /etc/Inputrc
-
-#
-# Set various bindings for emacs mode.
-
-set editing-mode emacs
-
-$if mode=emacs
-
-Meta-Control-h: backward-kill-word Text after the function name is ignored
-
-#
-# Arrow keys in keypad mode
-#
-#"\M-OD": backward-char
-#"\M-OC": forward-char
-#"\M-OA": previous-history
-#"\M-OB": next-history
-#
-# Arrow keys in ANSI mode
-#
-"\M-[D": backward-char
-"\M-[C": forward-char
-"\M-[A": previous-history
-"\M-[B": next-history
-#
-# Arrow keys in 8 bit keypad mode
-#
-#"\M-\C-OD": backward-char
-#"\M-\C-OC": forward-char
-#"\M-\C-OA": previous-history
-#"\M-\C-OB": next-history
-#
-# Arrow keys in 8 bit ANSI mode
-#
-#"\M-\C-[D": backward-char
-#"\M-\C-[C": forward-char
-#"\M-\C-[A": previous-history
-#"\M-\C-[B": next-history
-
-C-q: quoted-insert
-
-$endif
-
-# An old-style binding. This happens to be the default.
-TAB: complete
-
-# Macros that are convenient for shell interaction
-$if Bash
-# edit the path
-"\C-xp": "PATH=$@{PATH@}\e\C-e\C-a\ef\C-f"
-# prepare to type a quoted word --
-# insert open and close double quotes
-# and move to just after the open quote
-"\C-x\"": "\"\"\C-b"
-# insert a backslash (testing backslash escapes
-# in sequences and macros)
-"\C-x\\": "\\"
-# Quote the current or previous word
-"\C-xq": "\eb\"\ef\""
-# Add a binding to refresh the line, which is unbound
-"\C-xr": redraw-current-line
-# Edit variable on current line.
-"\M-\C-v": "\C-a\C-k$\C-y\M-\C-e\C-a\C-y="
-$endif
-
-# use a visible bell if one is available
-set bell-style visible
-
-# don't strip characters to 7 bits when reading
-set input-meta on
-
-# allow iso-latin1 characters to be inserted rather
-# than converted to prefix-meta sequences
-set convert-meta off
-
-# display characters with the eighth bit set directly
-# rather than as meta-prefixed characters
-set output-meta on
-
-# if there are more than 150 possible completions for
-# a word, ask the user if he wants to see all of them
-set completion-query-items 150
-
-# For FTP
-$if Ftp
-"\C-xg": "get \M-?"
-"\C-xt": "put \M-?"
-"\M-.": yank-last-arg
-$endif
-@end example
-
-@node Bindable Readline Commands
-@section Bindable Readline Commands
-
-@menu
-* Commands For Moving:: Moving about the line.
-* Commands For History:: Getting at previous lines.
-* Commands For Text:: Commands for changing text.
-* Commands For Killing:: Commands for killing and yanking.
-* Numeric Arguments:: Specifying numeric arguments, repeat counts.
-* Commands For Completion:: Getting Readline to do the typing for you.
-* Keyboard Macros:: Saving and re-executing typed characters
-* Miscellaneous Commands:: Other miscellaneous commands.
-@end menu
-
-This section describes Readline commands that may be bound to key
-sequences.
-@ifset BashFeatures
-You can list your key bindings by executing
-@w{@code{bind -P}} or, for a more terse format, suitable for an
-@var{inputrc} file, @w{@code{bind -p}}. (@xref{Bash Builtins}.)
-@end ifset
-Command names without an accompanying key sequence are unbound by default.
-
-In the following descriptions, @dfn{point} refers to the current cursor
-position, and @dfn{mark} refers to a cursor position saved by the
-@code{set-mark} command.
-The text between the point and mark is referred to as the @dfn{region}.
-
-@node Commands For Moving
-@subsection Commands For Moving
-@ftable @code
-@item beginning-of-line (C-a)
-Move to the start of the current line.
-
-@item end-of-line (C-e)
-Move to the end of the line.
-
-@item forward-char (C-f)
-Move forward a character.
-
-@item backward-char (C-b)
-Move back a character.
-
-@item forward-word (M-f)
-Move forward to the end of the next word.
-Words are composed of letters and digits.
-
-@item backward-word (M-b)
-Move back to the start of the current or previous word.
-Words are composed of letters and digits.
-
-@ifset BashFeatures
-@item shell-forward-word ()
-Move forward to the end of the next word.
-Words are delimited by non-quoted shell metacharacters.
-
-@item shell-backward-word ()
-Move back to the start of the current or previous word.
-Words are delimited by non-quoted shell metacharacters.
-@end ifset
-
-@item clear-screen (C-l)
-Clear the screen and redraw the current line,
-leaving the current line at the top of the screen.
-
-@item redraw-current-line ()
-Refresh the current line. By default, this is unbound.
-
-@end ftable
-
-@node Commands For History
-@subsection Commands For Manipulating The History
-
-@ftable @code
-@item accept-line (Newline or Return)
-@ifset BashFeatures
-Accept the line regardless of where the cursor is.
-If this line is
-non-empty, add it to the history list according to the setting of
-the @env{HISTCONTROL} and @env{HISTIGNORE} variables.
-If this line is a modified history line, then restore the history line
-to its original state.
-@end ifset
-@ifclear BashFeatures
-Accept the line regardless of where the cursor is.
-If this line is
-non-empty, it may be added to the history list for future recall with
-@code{add_history()}.
-If this line is a modified history line, the history line is restored
-to its original state.
-@end ifclear
-
-@item previous-history (C-p)
-Move `back' through the history list, fetching the previous command.
-
-@item next-history (C-n)
-Move `forward' through the history list, fetching the next command.
-
-@item beginning-of-history (M-<)
-Move to the first line in the history.
-
-@item end-of-history (M->)
-Move to the end of the input history, i.e., the line currently
-being entered.
-
-@item reverse-search-history (C-r)
-Search backward starting at the current line and moving `up' through
-the history as necessary. This is an incremental search.
-
-@item forward-search-history (C-s)
-Search forward starting at the current line and moving `down' through
-the the history as necessary. This is an incremental search.
-
-@item non-incremental-reverse-search-history (M-p)
-Search backward starting at the current line and moving `up'
-through the history as necessary using a non-incremental search
-for a string supplied by the user.
-
-@item non-incremental-forward-search-history (M-n)
-Search forward starting at the current line and moving `down'
-through the the history as necessary using a non-incremental search
-for a string supplied by the user.
-
-@item history-search-forward ()
-Search forward through the history for the string of characters
-between the start of the current line and the point.
-The search string must match at the beginning of a history line.
-This is a non-incremental search.
-By default, this command is unbound.
-
-@item history-search-backward ()
-Search backward through the history for the string of characters
-between the start of the current line and the point.
-The search string must match at the beginning of a history line.
-This is a non-incremental search.
-By default, this command is unbound.
-
-@item history-substr-search-forward ()
-Search forward through the history for the string of characters
-between the start of the current line and the point.
-The search string may match anywhere in a history line.
-This is a non-incremental search.
-By default, this command is unbound.
-
-@item history-substr-search-backward ()
-Search backward through the history for the string of characters
-between the start of the current line and the point.
-The search string may match anywhere in a history line.
-This is a non-incremental search.
-By default, this command is unbound.
-
-@item yank-nth-arg (M-C-y)
-Insert the first argument to the previous command (usually
-the second word on the previous line) at point.
-With an argument @var{n},
-insert the @var{n}th word from the previous command (the words
-in the previous command begin with word 0). A negative argument
-inserts the @var{n}th word from the end of the previous command.
-Once the argument @var{n} is computed, the argument is extracted
-as if the @samp{!@var{n}} history expansion had been specified.
-
-@item yank-last-arg (M-. or M-_)
-Insert last argument to the previous command (the last word of the
-previous history entry).
-With a numeric argument, behave exactly like @code{yank-nth-arg}.
-Successive calls to @code{yank-last-arg} move back through the history
-list, inserting the last word (or the word specified by the argument to
-the first call) of each line in turn.
-Any numeric argument supplied to these successive calls determines
-the direction to move through the history. A negative argument switches
-the direction through the history (back or forward).
-The history expansion facilities are used to extract the last argument,
-as if the @samp{!$} history expansion had been specified.
-
-@end ftable
-
-@node Commands For Text
-@subsection Commands For Changing Text
-
-@ftable @code
-@item delete-char (C-d)
-Delete the character at point. If point is at the
-beginning of the line, there are no characters in the line, and
-the last character typed was not bound to @code{delete-char}, then
-return @sc{eof}.
-
-@item backward-delete-char (Rubout)
-Delete the character behind the cursor. A numeric argument means
-to kill the characters instead of deleting them.
-
-@item forward-backward-delete-char ()
-Delete the character under the cursor, unless the cursor is at the
-end of the line, in which case the character behind the cursor is
-deleted. By default, this is not bound to a key.
-
-@item quoted-insert (C-q or C-v)
-Add the next character typed to the line verbatim. This is
-how to insert key sequences like @kbd{C-q}, for example.
-
-@ifclear BashFeatures
-@item tab-insert (M-@key{TAB})
-Insert a tab character.
-@end ifclear
-
-@item self-insert (a, b, A, 1, !, @dots{})
-Insert yourself.
-
-@item transpose-chars (C-t)
-Drag the character before the cursor forward over
-the character at the cursor, moving the
-cursor forward as well. If the insertion point
-is at the end of the line, then this
-transposes the last two characters of the line.
-Negative arguments have no effect.
-
-@item transpose-words (M-t)
-Drag the word before point past the word after point,
-moving point past that word as well.
-If the insertion point is at the end of the line, this transposes
-the last two words on the line.
-
-@item upcase-word (M-u)
-Uppercase the current (or following) word. With a negative argument,
-uppercase the previous word, but do not move the cursor.
-
-@item downcase-word (M-l)
-Lowercase the current (or following) word. With a negative argument,
-lowercase the previous word, but do not move the cursor.
-
-@item capitalize-word (M-c)
-Capitalize the current (or following) word. With a negative argument,
-capitalize the previous word, but do not move the cursor.
-
-@item overwrite-mode ()
-Toggle overwrite mode. With an explicit positive numeric argument,
-switches to overwrite mode. With an explicit non-positive numeric
-argument, switches to insert mode. This command affects only
-@code{emacs} mode; @code{vi} mode does overwrite differently.
-Each call to @code{readline()} starts in insert mode.
-
-In overwrite mode, characters bound to @code{self-insert} replace
-the text at point rather than pushing the text to the right.
-Characters bound to @code{backward-delete-char} replace the character
-before point with a space.
-
-By default, this command is unbound.
-
-@end ftable
-
-@node Commands For Killing
-@subsection Killing And Yanking
-
-@ftable @code
-
-@item kill-line (C-k)
-Kill the text from point to the end of the line.
-
-@item backward-kill-line (C-x Rubout)
-Kill backward to the beginning of the line.
-
-@item unix-line-discard (C-u)
-Kill backward from the cursor to the beginning of the current line.
-
-@item kill-whole-line ()
-Kill all characters on the current line, no matter where point is.
-By default, this is unbound.
-
-@item kill-word (M-d)
-Kill from point to the end of the current word, or if between
-words, to the end of the next word.
-Word boundaries are the same as @code{forward-word}.
-
-@item backward-kill-word (M-@key{DEL})
-Kill the word behind point.
-Word boundaries are the same as @code{backward-word}.
-
-@ifset BashFeatures
-@item shell-kill-word ()
-Kill from point to the end of the current word, or if between
-words, to the end of the next word.
-Word boundaries are the same as @code{shell-forward-word}.
-
-@item shell-backward-kill-word ()
-Kill the word behind point.
-Word boundaries are the same as @code{shell-backward-word}.
-@end ifset
-
-@item unix-word-rubout (C-w)
-Kill the word behind point, using white space as a word boundary.
-The killed text is saved on the kill-ring.
-
-@item unix-filename-rubout ()
-Kill the word behind point, using white space and the slash character
-as the word boundaries.
-The killed text is saved on the kill-ring.
-
-@item delete-horizontal-space ()
-Delete all spaces and tabs around point. By default, this is unbound.
-
-@item kill-region ()
-Kill the text in the current region.
-By default, this command is unbound.
-
-@item copy-region-as-kill ()
-Copy the text in the region to the kill buffer, so it can be yanked
-right away. By default, this command is unbound.
-
-@item copy-backward-word ()
-Copy the word before point to the kill buffer.
-The word boundaries are the same as @code{backward-word}.
-By default, this command is unbound.
-
-@item copy-forward-word ()
-Copy the word following point to the kill buffer.
-The word boundaries are the same as @code{forward-word}.
-By default, this command is unbound.
-
-@item yank (C-y)
-Yank the top of the kill ring into the buffer at point.
-
-@item yank-pop (M-y)
-Rotate the kill-ring, and yank the new top. You can only do this if
-the prior command is @code{yank} or @code{yank-pop}.
-@end ftable
-
-@node Numeric Arguments
-@subsection Specifying Numeric Arguments
-@ftable @code
-
-@item digit-argument (@kbd{M-0}, @kbd{M-1}, @dots{} @kbd{M--})
-Add this digit to the argument already accumulating, or start a new
-argument. @kbd{M--} starts a negative argument.
-
-@item universal-argument ()
-This is another way to specify an argument.
-If this command is followed by one or more digits, optionally with a
-leading minus sign, those digits define the argument.
-If the command is followed by digits, executing @code{universal-argument}
-again ends the numeric argument, but is otherwise ignored.
-As a special case, if this command is immediately followed by a
-character that is neither a digit or minus sign, the argument count
-for the next command is multiplied by four.
-The argument count is initially one, so executing this function the
-first time makes the argument count four, a second time makes the
-argument count sixteen, and so on.
-By default, this is not bound to a key.
-@end ftable
-
-@node Commands For Completion
-@subsection Letting Readline Type For You
-
-@ftable @code
-@item complete (@key{TAB})
-Attempt to perform completion on the text before point.
-The actual completion performed is application-specific.
-@ifset BashFeatures
-Bash attempts completion treating the text as a variable (if the
-text begins with @samp{$}), username (if the text begins with
-@samp{~}), hostname (if the text begins with @samp{@@}), or
-command (including aliases and functions) in turn. If none
-of these produces a match, filename completion is attempted.
-@end ifset
-@ifclear BashFeatures
-The default is filename completion.
-@end ifclear
-
-@item possible-completions (M-?)
-List the possible completions of the text before point.
-When displaying completions, Readline sets the number of columns used
-for display to the value of @code{completion-display-width}, the value of
-the environment variable @env{COLUMNS}, or the screen width, in that order.
-
-@item insert-completions (M-*)
-Insert all completions of the text before point that would have
-been generated by @code{possible-completions}.
-
-@item menu-complete ()
-Similar to @code{complete}, but replaces the word to be completed
-with a single match from the list of possible completions.
-Repeated execution of @code{menu-complete} steps through the list
-of possible completions, inserting each match in turn.
-At the end of the list of completions, the bell is rung
-(subject to the setting of @code{bell-style})
-and the original text is restored.
-An argument of @var{n} moves @var{n} positions forward in the list
-of matches; a negative argument may be used to move backward
-through the list.
-This command is intended to be bound to @key{TAB}, but is unbound
-by default.
-
-@item menu-complete-backward ()
-Identical to @code{menu-complete}, but moves backward through the list
-of possible completions, as if @code{menu-complete} had been given a
-negative argument.
-
-@item delete-char-or-list ()
-Deletes the character under the cursor if not at the beginning or
-end of the line (like @code{delete-char}).
-If at the end of the line, behaves identically to
-@code{possible-completions}.
-This command is unbound by default.
-
-@ifset BashFeatures
-@item complete-filename (M-/)
-Attempt filename completion on the text before point.
-
-@item possible-filename-completions (C-x /)
-List the possible completions of the text before point,
-treating it as a filename.
-
-@item complete-username (M-~)
-Attempt completion on the text before point, treating
-it as a username.
-
-@item possible-username-completions (C-x ~)
-List the possible completions of the text before point,
-treating it as a username.
-
-@item complete-variable (M-$)
-Attempt completion on the text before point, treating
-it as a shell variable.
-
-@item possible-variable-completions (C-x $)
-List the possible completions of the text before point,
-treating it as a shell variable.
-
-@item complete-hostname (M-@@)
-Attempt completion on the text before point, treating
-it as a hostname.
-
-@item possible-hostname-completions (C-x @@)
-List the possible completions of the text before point,
-treating it as a hostname.
-
-@item complete-command (M-!)
-Attempt completion on the text before point, treating
-it as a command name. Command completion attempts to
-match the text against aliases, reserved words, shell
-functions, shell builtins, and finally executable filenames,
-in that order.
-
-@item possible-command-completions (C-x !)
-List the possible completions of the text before point,
-treating it as a command name.
-
-@item dynamic-complete-history (M-@key{TAB})
-Attempt completion on the text before point, comparing
-the text against lines from the history list for possible
-completion matches.
-
-@item dabbrev-expand ()
-Attempt menu completion on the text before point, comparing
-the text against lines from the history list for possible
-completion matches.
-
-@item complete-into-braces (M-@{)
-Perform filename completion and insert the list of possible completions
-enclosed within braces so the list is available to the shell
-(@pxref{Brace Expansion}).
-
-@end ifset
-@end ftable
-
-@node Keyboard Macros
-@subsection Keyboard Macros
-@ftable @code
-
-@item start-kbd-macro (C-x ()
-Begin saving the characters typed into the current keyboard macro.
-
-@item end-kbd-macro (C-x ))
-Stop saving the characters typed into the current keyboard macro
-and save the definition.
-
-@item call-last-kbd-macro (C-x e)
-Re-execute the last keyboard macro defined, by making the characters
-in the macro appear as if typed at the keyboard.
-
-@end ftable
-
-@node Miscellaneous Commands
-@subsection Some Miscellaneous Commands
-@ftable @code
-
-@item re-read-init-file (C-x C-r)
-Read in the contents of the @var{inputrc} file, and incorporate
-any bindings or variable assignments found there.
-
-@item abort (C-g)
-Abort the current editing command and
-ring the terminal's bell (subject to the setting of
-@code{bell-style}).
-
-@item do-uppercase-version (M-a, M-b, M-@var{x}, @dots{})
-If the metafied character @var{x} is lowercase, run the command
-that is bound to the corresponding uppercase character.
-
-@item prefix-meta (@key{ESC})
-Metafy the next character typed. This is for keyboards
-without a meta key. Typing @samp{@key{ESC} f} is equivalent to typing
-@kbd{M-f}.
-
-@item undo (C-_ or C-x C-u)
-Incremental undo, separately remembered for each line.
-
-@item revert-line (M-r)
-Undo all changes made to this line. This is like executing the @code{undo}
-command enough times to get back to the beginning.
-
-@ifset BashFeatures
-@item tilde-expand (M-&)
-@end ifset
-@ifclear BashFeatures
-@item tilde-expand (M-~)
-@end ifclear
-Perform tilde expansion on the current word.
-
-@item set-mark (C-@@)
-Set the mark to the point. If a
-numeric argument is supplied, the mark is set to that position.
-
-@item exchange-point-and-mark (C-x C-x)
-Swap the point with the mark. The current cursor position is set to
-the saved position, and the old cursor position is saved as the mark.
-
-@item character-search (C-])
-A character is read and point is moved to the next occurrence of that
-character. A negative count searches for previous occurrences.
-
-@item character-search-backward (M-C-])
-A character is read and point is moved to the previous occurrence
-of that character. A negative count searches for subsequent
-occurrences.
-
-@item skip-csi-sequence ()
-Read enough characters to consume a multi-key sequence such as those
-defined for keys like Home and End. Such sequences begin with a
-Control Sequence Indicator (CSI), usually ESC-[. If this sequence is
-bound to "\e[", keys producing such sequences will have no effect
-unless explicitly bound to a readline command, instead of inserting
-stray characters into the editing buffer. This is unbound by default,
-but usually bound to ESC-[.
-
-@item insert-comment (M-#)
-Without a numeric argument, the value of the @code{comment-begin}
-variable is inserted at the beginning of the current line.
-If a numeric argument is supplied, this command acts as a toggle: if
-the characters at the beginning of the line do not match the value
-of @code{comment-begin}, the value is inserted, otherwise
-the characters in @code{comment-begin} are deleted from the beginning of
-the line.
-In either case, the line is accepted as if a newline had been typed.
-@ifset BashFeatures
-The default value of @code{comment-begin} causes this command
-to make the current line a shell comment.
-If a numeric argument causes the comment character to be removed, the line
-will be executed by the shell.
-@end ifset
-
-@item dump-functions ()
-Print all of the functions and their key bindings to the
-Readline output stream. If a numeric argument is supplied,
-the output is formatted in such a way that it can be made part
-of an @var{inputrc} file. This command is unbound by default.
-
-@item dump-variables ()
-Print all of the settable variables and their values to the
-Readline output stream. If a numeric argument is supplied,
-the output is formatted in such a way that it can be made part
-of an @var{inputrc} file. This command is unbound by default.
-
-@item dump-macros ()
-Print all of the Readline key sequences bound to macros and the
-strings they output. If a numeric argument is supplied,
-the output is formatted in such a way that it can be made part
-of an @var{inputrc} file. This command is unbound by default.
-
-@ifset BashFeatures
-@item glob-complete-word (M-g)
-The word before point is treated as a pattern for pathname expansion,
-with an asterisk implicitly appended. This pattern is used to
-generate a list of matching file names for possible completions.
-
-@item glob-expand-word (C-x *)
-The word before point is treated as a pattern for pathname expansion,
-and the list of matching file names is inserted, replacing the word.
-If a numeric argument is supplied, a @samp{*} is appended before
-pathname expansion.
-
-@item glob-list-expansions (C-x g)
-The list of expansions that would have been generated by
-@code{glob-expand-word} is displayed, and the line is redrawn.
-If a numeric argument is supplied, a @samp{*} is appended before
-pathname expansion.
-
-@item display-shell-version (C-x C-v)
-Display version information about the current instance of Bash.
-
-@item shell-expand-line (M-C-e)
-Expand the line as the shell does.
-This performs alias and history expansion as well as all of the shell
-word expansions (@pxref{Shell Expansions}).
-
-@item history-expand-line (M-^)
-Perform history expansion on the current line.
-
-@item magic-space ()
-Perform history expansion on the current line and insert a space
-(@pxref{History Interaction}).
-
-@item alias-expand-line ()
-Perform alias expansion on the current line (@pxref{Aliases}).
-
-@item history-and-alias-expand-line ()
-Perform history and alias expansion on the current line.
-
-@item insert-last-argument (M-. or M-_)
-A synonym for @code{yank-last-arg}.
-
-@item operate-and-get-next (C-o)
-Accept the current line for execution and fetch the next line
-relative to the current line from the history for editing. Any
-argument is ignored.
-
-@item edit-and-execute-command (C-xC-e)
-Invoke an editor on the current command line, and execute the result as shell
-commands.
-Bash attempts to invoke
-@code{$VISUAL}, @code{$EDITOR}, and @code{emacs}
-as the editor, in that order.
-
-@end ifset
-
-@ifclear BashFeatures
-@item emacs-editing-mode (C-e)
-When in @code{vi} command mode, this causes a switch to @code{emacs}
-editing mode.
-
-@item vi-editing-mode (M-C-j)
-When in @code{emacs} editing mode, this causes a switch to @code{vi}
-editing mode.
-
-@end ifclear
-
-@end ftable
-
-@node Readline vi Mode
-@section Readline vi Mode
-
-While the Readline library does not have a full set of @code{vi}
-editing functions, it does contain enough to allow simple editing
-of the line. The Readline @code{vi} mode behaves as specified in
-the @sc{posix} standard.
-
-@ifset BashFeatures
-In order to switch interactively between @code{emacs} and @code{vi}
-editing modes, use the @samp{set -o emacs} and @samp{set -o vi}
-commands (@pxref{The Set Builtin}).
-@end ifset
-@ifclear BashFeatures
-In order to switch interactively between @code{emacs} and @code{vi}
-editing modes, use the command @kbd{M-C-j} (bound to emacs-editing-mode
-when in @code{vi} mode and to vi-editing-mode in @code{emacs} mode).
-@end ifclear
-The Readline default is @code{emacs} mode.
-
-When you enter a line in @code{vi} mode, you are already placed in
-`insertion' mode, as if you had typed an @samp{i}. Pressing @key{ESC}
-switches you into `command' mode, where you can edit the text of the
-line with the standard @code{vi} movement keys, move to previous
-history lines with @samp{k} and subsequent lines with @samp{j}, and
-so forth.
-
-@ifset BashFeatures
-@node Programmable Completion
-@section Programmable Completion
-@cindex programmable completion
-
-When word completion is attempted for an argument to a command for
-which a completion specification (a @var{compspec}) has been defined
-using the @code{complete} builtin (@pxref{Programmable Completion Builtins}),
-the programmable completion facilities are invoked.
-
-First, the command name is identified.
-If a compspec has been defined for that command, the
-compspec is used to generate the list of possible completions for the word.
-If the command word is the empty string (completion attempted at the
-beginning of an empty line), any compspec defined with
-the @option{-E} option to @code{complete} is used.
-If the command word is a full pathname, a compspec for the full
-pathname is searched for first.
-If no compspec is found for the full pathname, an attempt is made to
-find a compspec for the portion following the final slash.
-If those searches do not result in a compspec, any compspec defined with
-the @option{-D} option to @code{complete} is used as the default.
-
-Once a compspec has been found, it is used to generate the list of
-matching words.
-If a compspec is not found, the default Bash completion
-described above (@pxref{Commands For Completion}) is performed.
-
-First, the actions specified by the compspec are used.
-Only matches which are prefixed by the word being completed are
-returned.
-When the @option{-f} or @option{-d} option is used for filename or
-directory name completion, the shell variable @env{FIGNORE} is
-used to filter the matches.
-@xref{Bash Variables}, for a description of @env{FIGNORE}.
-
-Any completions specified by a filename expansion pattern to the
-@option{-G} option are generated next.
-The words generated by the pattern need not match the word being completed.
-The @env{GLOBIGNORE} shell variable is not used to filter the matches,
-but the @env{FIGNORE} shell variable is used.
-
-Next, the string specified as the argument to the @option{-W} option
-is considered.
-The string is first split using the characters in the @env{IFS}
-special variable as delimiters.
-Shell quoting is honored.
-Each word is then expanded using
-brace expansion, tilde expansion, parameter and variable expansion,
-command substitution, and arithmetic expansion,
-as described above (@pxref{Shell Expansions}).
-The results are split using the rules described above
-(@pxref{Word Splitting}).
-The results of the expansion are prefix-matched against the word being
-completed, and the matching words become the possible completions.
-
-After these matches have been generated, any shell function or command
-specified with the @option{-F} and @option{-C} options is invoked.
-When the command or function is invoked, the @env{COMP_LINE},
-@env{COMP_POINT}, @env{COMP_KEY}, and @env{COMP_TYPE} variables are
-assigned values as described above (@pxref{Bash Variables}).
-If a shell function is being invoked, the @env{COMP_WORDS} and
-@env{COMP_CWORD} variables are also set.
-When the function or command is invoked, the first argument is the
-name of the command whose arguments are being completed, the
-second argument is the word being completed, and the third argument
-is the word preceding the word being completed on the current command line.
-No filtering of the generated completions against the word being completed
-is performed; the function or command has complete freedom in generating
-the matches.
-
-Any function specified with @option{-F} is invoked first.
-The function may use any of the shell facilities, including the
-@code{compgen} and @code{compopt} builtins described below
-(@pxref{Programmable Completion Builtins}), to generate the matches.
-It must put the possible completions in the @env{COMPREPLY} array
-variable.
-
-Next, any command specified with the @option{-C} option is invoked
-in an environment equivalent to command substitution.
-It should print a list of completions, one per line, to
-the standard output.
-Backslash may be used to escape a newline, if necessary.
-
-After all of the possible completions are generated, any filter
-specified with the @option{-X} option is applied to the list.
-The filter is a pattern as used for pathname expansion; a @samp{&}
-in the pattern is replaced with the text of the word being completed.
-A literal @samp{&} may be escaped with a backslash; the backslash
-is removed before attempting a match.
-Any completion that matches the pattern will be removed from the list.
-A leading @samp{!} negates the pattern; in this case any completion
-not matching the pattern will be removed.
-
-Finally, any prefix and suffix specified with the @option{-P} and @option{-S}
-options are added to each member of the completion list, and the result is
-returned to the Readline completion code as the list of possible
-completions.
-
-If the previously-applied actions do not generate any matches, and the
-@option{-o dirnames} option was supplied to @code{complete} when the
-compspec was defined, directory name completion is attempted.
-
-If the @option{-o plusdirs} option was supplied to @code{complete} when
-the compspec was defined, directory name completion is attempted and any
-matches are added to the results of the other actions.
-
-By default, if a compspec is found, whatever it generates is returned to
-the completion code as the full set of possible completions.
-The default Bash completions are not attempted, and the Readline default
-of filename completion is disabled.
-If the @option{-o bashdefault} option was supplied to @code{complete} when
-the compspec was defined, the default Bash completions are attempted
-if the compspec generates no matches.
-If the @option{-o default} option was supplied to @code{complete} when the
-compspec was defined, Readline's default completion will be performed
-if the compspec (and, if attempted, the default Bash completions)
-generate no matches.
-
-When a compspec indicates that directory name completion is desired,
-the programmable completion functions force Readline to append a slash
-to completed names which are symbolic links to directories, subject to
-the value of the @var{mark-directories} Readline variable, regardless
-of the setting of the @var{mark-symlinked-directories} Readline variable.
-
-There is some support for dynamically modifying completions. This is
-most useful when used in combination with a default completion specified
-with @option{-D}. It's possible for shell functions executed as completion
-handlers to indicate that completion should be retried by returning an
-exit status of 124. If a shell function returns 124, and changes
-the compspec associated with the command on which completion is being
-attempted (supplied as the first argument when the function is executed),
-programmable completion restarts from the beginning, with an
-attempt to find a new compspec for that command. This allows a set of
-completions to be built dynamically as completion is attempted, rather than
-being loaded all at once.
-
-For instance, assuming that there is a library of compspecs, each kept in a
-file corresponding to the name of the command, the following default
-completion function would load completions dynamically:
-
-@example
-_completion_loader()
-@{
- . "/etc/bash_completion.d/$1.sh" >/dev/null 2>&1 && return 124
-@}
-complete -D -F _completion_loader
-@end example
-
-@node Programmable Completion Builtins
-@section Programmable Completion Builtins
-@cindex completion builtins
-
-Two builtin commands are available to manipulate the programmable completion
-facilities.
-
-@table @code
-@item compgen
-@btindex compgen
-@example
-@code{compgen [@var{option}] [@var{word}]}
-@end example
-
-Generate possible completion matches for @var{word} according to
-the @var{option}s, which may be any option accepted by the
-@code{complete}
-builtin with the exception of @option{-p} and @option{-r}, and write
-the matches to the standard output.
-When using the @option{-F} or @option{-C} options, the various shell variables
-set by the programmable completion facilities, while available, will not
-have useful values.
-
-The matches will be generated in the same way as if the programmable
-completion code had generated them directly from a completion specification
-with the same flags.
-If @var{word} is specified, only those completions matching @var{word}
-will be displayed.
-
-The return value is true unless an invalid option is supplied, or no
-matches were generated.
-
-@item complete
-@btindex complete
-@example
-@code{complete [-abcdefgjksuv] [-o @var{comp-option}] [-DE] [-A @var{action}] [-G @var{globpat}] [-W @var{wordlist}]
-[-F @var{function}] [-C @var{command}] [-X @var{filterpat}]
-[-P @var{prefix}] [-S @var{suffix}] @var{name} [@var{name} @dots{}]}
-@code{complete -pr [-DE] [@var{name} @dots{}]}
-@end example
-
-Specify how arguments to each @var{name} should be completed.
-If the @option{-p} option is supplied, or if no options are supplied, existing
-completion specifications are printed in a way that allows them to be
-reused as input.
-The @option{-r} option removes a completion specification for
-each @var{name}, or, if no @var{name}s are supplied, all
-completion specifications.
-The @option{-D} option indicates that the remaining options and actions should
-apply to the ``default'' command completion; that is, completion attempted
-on a command for which no completion has previously been defined.
-The @option{-E} option indicates that the remaining options and actions should
-apply to ``empty'' command completion; that is, completion attempted on a
-blank line.
-
-The process of applying these completion specifications when word completion
-is attempted is described above (@pxref{Programmable Completion}). The
-@option{-D} option takes precedence over @option{-E}.
-
-Other options, if specified, have the following meanings.
-The arguments to the @option{-G}, @option{-W}, and @option{-X} options
-(and, if necessary, the @option{-P} and @option{-S} options)
-should be quoted to protect them from expansion before the
-@code{complete} builtin is invoked.
-
-
-@table @code
-@item -o @var{comp-option}
-The @var{comp-option} controls several aspects of the compspec's behavior
-beyond the simple generation of completions.
-@var{comp-option} may be one of:
-
-@table @code
-
-@item bashdefault
-Perform the rest of the default Bash completions if the compspec
-generates no matches.
-
-@item default
-Use Readline's default filename completion if the compspec generates
-no matches.
-
-@item dirnames
-Perform directory name completion if the compspec generates no matches.
-
-@item filenames
-Tell Readline that the compspec generates filenames, so it can perform any
-filename-specific processing (like adding a slash to directory names
-quoting special characters, or suppressing trailing spaces).
-This option is intended to be used with shell functions specified
-with @option{-F}.
-
-@item nospace
-Tell Readline not to append a space (the default) to words completed at
-the end of the line.
-
-@item plusdirs
-After any matches defined by the compspec are generated,
-directory name completion is attempted and any
-matches are added to the results of the other actions.
-
-@end table
-
-@item -A @var{action}
-The @var{action} may be one of the following to generate a list of possible
-completions:
-
-@table @code
-@item alias
-Alias names. May also be specified as @option{-a}.
-
-@item arrayvar
-Array variable names.
-
-@item binding
-Readline key binding names (@pxref{Bindable Readline Commands}).
-
-@item builtin
-Names of shell builtin commands. May also be specified as @option{-b}.
-
-@item command
-Command names. May also be specified as @option{-c}.
-
-@item directory
-Directory names. May also be specified as @option{-d}.
-
-@item disabled
-Names of disabled shell builtins.
-
-@item enabled
-Names of enabled shell builtins.
-
-@item export
-Names of exported shell variables. May also be specified as @option{-e}.
-
-@item file
-File names. May also be specified as @option{-f}.
-
-@item function
-Names of shell functions.
-
-@item group
-Group names. May also be specified as @option{-g}.
-
-@item helptopic
-Help topics as accepted by the @code{help} builtin (@pxref{Bash Builtins}).
-
-@item hostname
-Hostnames, as taken from the file specified by the
-@env{HOSTFILE} shell variable (@pxref{Bash Variables}).
-
-@item job
-Job names, if job control is active. May also be specified as @option{-j}.
-
-@item keyword
-Shell reserved words. May also be specified as @option{-k}.
-
-@item running
-Names of running jobs, if job control is active.
-
-@item service
-Service names. May also be specified as @option{-s}.
-
-@item setopt
-Valid arguments for the @option{-o} option to the @code{set} builtin
-(@pxref{The Set Builtin}).
-
-@item shopt
-Shell option names as accepted by the @code{shopt} builtin
-(@pxref{Bash Builtins}).
-
-@item signal
-Signal names.
-
-@item stopped
-Names of stopped jobs, if job control is active.
-
-@item user
-User names. May also be specified as @option{-u}.
-
-@item variable
-Names of all shell variables. May also be specified as @option{-v}.
-@end table
-
-@item -C @var{command}
-@var{command} is executed in a subshell environment, and its output is
-used as the possible completions.
-
-@item -F @var{function}
-The shell function @var{function} is executed in the current shell
-environment.
-When it finishes, the possible completions are retrieved from the value
-of the @env{COMPREPLY} array variable.
-
-@item -G @var{globpat}
-The filename expansion pattern @var{globpat} is expanded to generate
-the possible completions.
-
-@item -P @var{prefix}
-@var{prefix} is added at the beginning of each possible completion
-after all other options have been applied.
-
-@item -S @var{suffix}
-@var{suffix} is appended to each possible completion
-after all other options have been applied.
-
-@item -W @var{wordlist}
-The @var{wordlist} is split using the characters in the
-@env{IFS} special variable as delimiters, and each resultant word
-is expanded.
-The possible completions are the members of the resultant list which
-match the word being completed.
-
-@item -X @var{filterpat}
-@var{filterpat} is a pattern as used for filename expansion.
-It is applied to the list of possible completions generated by the
-preceding options and arguments, and each completion matching
-@var{filterpat} is removed from the list.
-A leading @samp{!} in @var{filterpat} negates the pattern; in this
-case, any completion not matching @var{filterpat} is removed.
-@end table
-
-The return value is true unless an invalid option is supplied, an option
-other than @option{-p} or @option{-r} is supplied without a @var{name}
-argument, an attempt is made to remove a completion specification for
-a @var{name} for which no specification exists, or
-an error occurs adding a completion specification.
-
-@item compopt
-@btindex compopt
-@example
-@code{compopt} [-o @var{option}] [-DE] [+o @var{option}] [@var{name}]
-@end example
-Modify completion options for each @var{name} according to the
-@var{option}s, or for the currently-executing completion if no @var{name}s
-are supplied.
-If no @var{option}s are given, display the completion options for each
-@var{name} or the current completion.
-The possible values of @var{option} are those valid for the @code{complete}
-builtin described above.
-The @option{-D} option indicates that the remaining options should
-apply to the ``default'' command completion; that is, completion attempted
-on a command for which no completion has previously been defined.
-The @option{-E} option indicates that the remaining options should
-apply to ``empty'' command completion; that is, completion attempted on a
-blank line.
-
-The @option{-D} option takes precedence over @option{-E}.
-
-The return value is true unless an invalid option is supplied, an attempt
-is made to modify the options for a @var{name} for which no completion
-specification exists, or an output error occurs.
-
-@end table
-
-@end ifset
+++ /dev/null
-/* funmap.c -- attach names to functions. */
-
-/* Copyright (C) 1987-2010 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#if !defined (BUFSIZ)
-#include <stdio.h>
-#endif /* BUFSIZ */
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif /* HAVE_STDLIB_H */
-
-#include "rlconf.h"
-#include "readline.h"
-
-#include "xmalloc.h"
-
-#ifdef __STDC__
-typedef int QSFUNC (const void *, const void *);
-#else
-typedef int QSFUNC ();
-#endif
-
-extern int _rl_qsort_string_compare PARAMS((char **, char **));
-
-FUNMAP **funmap;
-static int funmap_size;
-static int funmap_entry;
-
-/* After initializing the function map, this is the index of the first
- program specific function. */
-int funmap_program_specific_entry_start;
-
-static const FUNMAP default_funmap[] = {
- { "abort", rl_abort },
- { "accept-line", rl_newline },
- { "arrow-key-prefix", rl_arrow_keys },
- { "backward-byte", rl_backward_byte },
- { "backward-char", rl_backward_char },
- { "backward-delete-char", rl_rubout },
- { "backward-kill-line", rl_backward_kill_line },
- { "backward-kill-word", rl_backward_kill_word },
- { "backward-word", rl_backward_word },
- { "beginning-of-history", rl_beginning_of_history },
- { "beginning-of-line", rl_beg_of_line },
- { "call-last-kbd-macro", rl_call_last_kbd_macro },
- { "capitalize-word", rl_capitalize_word },
- { "character-search", rl_char_search },
- { "character-search-backward", rl_backward_char_search },
- { "clear-screen", rl_clear_screen },
- { "complete", rl_complete },
- { "copy-backward-word", rl_copy_backward_word },
- { "copy-forward-word", rl_copy_forward_word },
- { "copy-region-as-kill", rl_copy_region_to_kill },
- { "delete-char", rl_delete },
- { "delete-char-or-list", rl_delete_or_show_completions },
- { "delete-horizontal-space", rl_delete_horizontal_space },
- { "digit-argument", rl_digit_argument },
- { "do-lowercase-version", rl_do_lowercase_version },
- { "downcase-word", rl_downcase_word },
- { "dump-functions", rl_dump_functions },
- { "dump-macros", rl_dump_macros },
- { "dump-variables", rl_dump_variables },
- { "emacs-editing-mode", rl_emacs_editing_mode },
- { "end-kbd-macro", rl_end_kbd_macro },
- { "end-of-history", rl_end_of_history },
- { "end-of-line", rl_end_of_line },
- { "exchange-point-and-mark", rl_exchange_point_and_mark },
- { "forward-backward-delete-char", rl_rubout_or_delete },
- { "forward-byte", rl_forward_byte },
- { "forward-char", rl_forward_char },
- { "forward-search-history", rl_forward_search_history },
- { "forward-word", rl_forward_word },
- { "history-search-backward", rl_history_search_backward },
- { "history-search-forward", rl_history_search_forward },
- { "insert-comment", rl_insert_comment },
- { "insert-completions", rl_insert_completions },
- { "kill-whole-line", rl_kill_full_line },
- { "kill-line", rl_kill_line },
- { "kill-region", rl_kill_region },
- { "kill-word", rl_kill_word },
- { "menu-complete", rl_menu_complete },
- { "menu-complete-backward", rl_backward_menu_complete },
- { "next-history", rl_get_next_history },
- { "non-incremental-forward-search-history", rl_noninc_forward_search },
- { "non-incremental-reverse-search-history", rl_noninc_reverse_search },
- { "non-incremental-forward-search-history-again", rl_noninc_forward_search_again },
- { "non-incremental-reverse-search-history-again", rl_noninc_reverse_search_again },
- { "old-menu-complete", rl_old_menu_complete },
- { "overwrite-mode", rl_overwrite_mode },
-#ifdef __CYGWIN__
- { "paste-from-clipboard", rl_paste_from_clipboard },
-#endif
- { "possible-completions", rl_possible_completions },
- { "previous-history", rl_get_previous_history },
- { "quoted-insert", rl_quoted_insert },
- { "re-read-init-file", rl_re_read_init_file },
- { "redraw-current-line", rl_refresh_line},
- { "reverse-search-history", rl_reverse_search_history },
- { "revert-line", rl_revert_line },
- { "self-insert", rl_insert },
- { "set-mark", rl_set_mark },
- { "skip-csi-sequence", rl_skip_csi_sequence },
- { "start-kbd-macro", rl_start_kbd_macro },
- { "tab-insert", rl_tab_insert },
- { "tilde-expand", rl_tilde_expand },
- { "transpose-chars", rl_transpose_chars },
- { "transpose-words", rl_transpose_words },
- { "tty-status", rl_tty_status },
- { "undo", rl_undo_command },
- { "universal-argument", rl_universal_argument },
- { "unix-filename-rubout", rl_unix_filename_rubout },
- { "unix-line-discard", rl_unix_line_discard },
- { "unix-word-rubout", rl_unix_word_rubout },
- { "upcase-word", rl_upcase_word },
- { "yank", rl_yank },
- { "yank-last-arg", rl_yank_last_arg },
- { "yank-nth-arg", rl_yank_nth_arg },
- { "yank-pop", rl_yank_pop },
-
-#if defined (VI_MODE)
- { "vi-append-eol", rl_vi_append_eol },
- { "vi-append-mode", rl_vi_append_mode },
- { "vi-arg-digit", rl_vi_arg_digit },
- { "vi-back-to-indent", rl_vi_back_to_indent },
- { "vi-backward-bigword", rl_vi_bWord },
- { "vi-backward-word", rl_vi_bword },
- { "vi-bWord", rl_vi_bWord },
- { "vi-bword", rl_vi_bword },
- { "vi-change-case", rl_vi_change_case },
- { "vi-change-char", rl_vi_change_char },
- { "vi-change-to", rl_vi_change_to },
- { "vi-char-search", rl_vi_char_search },
- { "vi-column", rl_vi_column },
- { "vi-complete", rl_vi_complete },
- { "vi-delete", rl_vi_delete },
- { "vi-delete-to", rl_vi_delete_to },
- { "vi-eWord", rl_vi_eWord },
- { "vi-editing-mode", rl_vi_editing_mode },
- { "vi-end-bigword", rl_vi_eWord },
- { "vi-end-word", rl_vi_end_word },
- { "vi-eof-maybe", rl_vi_eof_maybe },
- { "vi-eword", rl_vi_eword },
- { "vi-fWord", rl_vi_fWord },
- { "vi-fetch-history", rl_vi_fetch_history },
- { "vi-first-print", rl_vi_first_print },
- { "vi-forward-bigword", rl_vi_fWord },
- { "vi-forward-word", rl_vi_fword },
- { "vi-fword", rl_vi_fword },
- { "vi-goto-mark", rl_vi_goto_mark },
- { "vi-insert-beg", rl_vi_insert_beg },
- { "vi-insertion-mode", rl_vi_insertion_mode },
- { "vi-match", rl_vi_match },
- { "vi-movement-mode", rl_vi_movement_mode },
- { "vi-next-word", rl_vi_next_word },
- { "vi-overstrike", rl_vi_overstrike },
- { "vi-overstrike-delete", rl_vi_overstrike_delete },
- { "vi-prev-word", rl_vi_prev_word },
- { "vi-put", rl_vi_put },
- { "vi-redo", rl_vi_redo },
- { "vi-replace", rl_vi_replace },
- { "vi-rubout", rl_vi_rubout },
- { "vi-search", rl_vi_search },
- { "vi-search-again", rl_vi_search_again },
- { "vi-set-mark", rl_vi_set_mark },
- { "vi-subst", rl_vi_subst },
- { "vi-tilde-expand", rl_vi_tilde_expand },
- { "vi-yank-arg", rl_vi_yank_arg },
- { "vi-yank-to", rl_vi_yank_to },
-#endif /* VI_MODE */
-
- {(char *)NULL, (rl_command_func_t *)NULL }
-};
-
-int
-rl_add_funmap_entry (name, function)
- const char *name;
- rl_command_func_t *function;
-{
- if (funmap_entry + 2 >= funmap_size)
- {
- funmap_size += 64;
- funmap = (FUNMAP **)xrealloc (funmap, funmap_size * sizeof (FUNMAP *));
- }
-
- funmap[funmap_entry] = (FUNMAP *)xmalloc (sizeof (FUNMAP));
- funmap[funmap_entry]->name = name;
- funmap[funmap_entry]->function = function;
-
- funmap[++funmap_entry] = (FUNMAP *)NULL;
- return funmap_entry;
-}
-
-static int funmap_initialized;
-
-/* Make the funmap contain all of the default entries. */
-void
-rl_initialize_funmap ()
-{
- register int i;
-
- if (funmap_initialized)
- return;
-
- for (i = 0; default_funmap[i].name; i++)
- rl_add_funmap_entry (default_funmap[i].name, default_funmap[i].function);
-
- funmap_initialized = 1;
- funmap_program_specific_entry_start = i;
-}
-
-/* Produce a NULL terminated array of known function names. The array
- is sorted. The array itself is allocated, but not the strings inside.
- You should free () the array when you done, but not the pointrs. */
-const char **
-rl_funmap_names ()
-{
- const char **result;
- int result_size, result_index;
-
- /* Make sure that the function map has been initialized. */
- rl_initialize_funmap ();
-
- for (result_index = result_size = 0, result = (const char **)NULL; funmap[result_index]; result_index++)
- {
- if (result_index + 2 > result_size)
- {
- result_size += 20;
- result = (const char **)xrealloc (result, result_size * sizeof (char *));
- }
-
- result[result_index] = funmap[result_index]->name;
- result[result_index + 1] = (char *)NULL;
- }
-
- qsort (result, result_index, sizeof (char *), (QSFUNC *)_rl_qsort_string_compare);
- return (result);
-}
+++ /dev/null
-/* histfile.c - functions to manipulate the history file. */
-
-/* Copyright (C) 1989-2010 Free Software Foundation, Inc.
-
- This file contains the GNU History Library (History), a set of
- routines for managing the text of previously typed lines.
-
- History is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- History is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with History. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/* The goal is to make the implementation transparent, so that you
- don't have to know what data types are used, just what functions
- you can call. I think I have done that. */
-
-#define READLINE_LIBRARY
-
-#if defined (__TANDEM)
-# include <floss.h>
-#endif
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <stdio.h>
-
-#include <sys/types.h>
-#if ! defined (_MINIX) && defined (HAVE_SYS_FILE_H)
-# include <sys/file.h>
-#endif
-#include "posixstat.h"
-#include <fcntl.h>
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif /* HAVE_STDLIB_H */
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include <ctype.h>
-
-#if defined (__EMX__)
-# undef HAVE_MMAP
-#endif
-
-#ifdef HISTORY_USE_MMAP
-# include <sys/mman.h>
-
-# ifdef MAP_FILE
-# define MAP_RFLAGS (MAP_FILE|MAP_PRIVATE)
-# define MAP_WFLAGS (MAP_FILE|MAP_SHARED)
-# else
-# define MAP_RFLAGS MAP_PRIVATE
-# define MAP_WFLAGS MAP_SHARED
-# endif
-
-# ifndef MAP_FAILED
-# define MAP_FAILED ((void *)-1)
-# endif
-
-#endif /* HISTORY_USE_MMAP */
-
-/* If we're compiling for __EMX__ (OS/2) or __CYGWIN__ (cygwin32 environment
- on win 95/98/nt), we want to open files with O_BINARY mode so that there
- is no \n -> \r\n conversion performed. On other systems, we don't want to
- mess around with O_BINARY at all, so we ensure that it's defined to 0. */
-#if defined (__EMX__) || defined (__CYGWIN__)
-# ifndef O_BINARY
-# define O_BINARY 0
-# endif
-#else /* !__EMX__ && !__CYGWIN__ */
-# undef O_BINARY
-# define O_BINARY 0
-#endif /* !__EMX__ && !__CYGWIN__ */
-
-#include <errno.h>
-#if !defined (errno)
-extern int errno;
-#endif /* !errno */
-
-#include "history.h"
-#include "histlib.h"
-
-#include "rlshell.h"
-#include "xmalloc.h"
-
-/* If non-zero, we write timestamps to the history file in history_do_write() */
-int history_write_timestamps = 0;
-
-/* Does S look like the beginning of a history timestamp entry? Placeholder
- for more extensive tests. */
-#define HIST_TIMESTAMP_START(s) (*(s) == history_comment_char && isdigit ((s)[1]) )
-
-/* Return the string that should be used in the place of this
- filename. This only matters when you don't specify the
- filename to read_history (), or write_history (). */
-static char *
-history_filename (filename)
- const char *filename;
-{
- char *return_val;
- const char *home;
- int home_len;
-
- return_val = filename ? savestring (filename) : (char *)NULL;
-
- if (return_val)
- return (return_val);
-
- home = sh_get_env_value ("HOME");
-
- if (home == 0)
- return (NULL);
- else
- home_len = strlen (home);
-
- return_val = (char *)xmalloc (2 + home_len + 8); /* strlen(".history") == 8 */
- strcpy (return_val, home);
- return_val[home_len] = '/';
-#if defined (__MSDOS__)
- strcpy (return_val + home_len + 1, "_history");
-#else
- strcpy (return_val + home_len + 1, ".history");
-#endif
-
- return (return_val);
-}
-
-static char *
-history_backupfile (filename)
- const char *filename;
-{
- char *ret;
- size_t len;
-
- len = strlen (filename);
- ret = xmalloc (len + 2);
- strcpy (ret, filename);
- ret[len] = '-';
- ret[len+1] = '\0';
- return ret;
-}
-
-/* Add the contents of FILENAME to the history list, a line at a time.
- If FILENAME is NULL, then read from ~/.history. Returns 0 if
- successful, or errno if not. */
-int
-read_history (filename)
- const char *filename;
-{
- return (read_history_range (filename, 0, -1));
-}
-
-/* Read a range of lines from FILENAME, adding them to the history list.
- Start reading at the FROM'th line and end at the TO'th. If FROM
- is zero, start at the beginning. If TO is less than FROM, read
- until the end of the file. If FILENAME is NULL, then read from
- ~/.history. Returns 0 if successful, or errno if not. */
-int
-read_history_range (filename, from, to)
- const char *filename;
- int from, to;
-{
- register char *line_start, *line_end, *p;
- char *input, *buffer, *bufend, *last_ts;
- int file, current_line, chars_read;
- struct stat finfo;
- size_t file_size;
-#if defined (EFBIG)
- int overflow_errno = EFBIG;
-#elif defined (EOVERFLOW)
- int overflow_errno = EOVERFLOW;
-#else
- int overflow_errno = EIO;
-#endif
-
- buffer = last_ts = (char *)NULL;
- input = history_filename (filename);
- file = input ? open (input, O_RDONLY|O_BINARY, 0666) : -1;
-
- if ((file < 0) || (fstat (file, &finfo) == -1))
- goto error_and_exit;
-
- file_size = (size_t)finfo.st_size;
-
- /* check for overflow on very large files */
- if (file_size != finfo.st_size || file_size + 1 < file_size)
- {
- errno = overflow_errno;
- goto error_and_exit;
- }
-
-#ifdef HISTORY_USE_MMAP
- /* We map read/write and private so we can change newlines to NULs without
- affecting the underlying object. */
- buffer = (char *)mmap (0, file_size, PROT_READ|PROT_WRITE, MAP_RFLAGS, file, 0);
- if ((void *)buffer == MAP_FAILED)
- {
- errno = overflow_errno;
- goto error_and_exit;
- }
- chars_read = file_size;
-#else
- buffer = (char *)malloc (file_size + 1);
- if (buffer == 0)
- {
- errno = overflow_errno;
- goto error_and_exit;
- }
-
- chars_read = read (file, buffer, file_size);
-#endif
- if (chars_read < 0)
- {
- error_and_exit:
- if (errno != 0)
- chars_read = errno;
- else
- chars_read = EIO;
- if (file >= 0)
- close (file);
-
- FREE (input);
-#ifndef HISTORY_USE_MMAP
- FREE (buffer);
-#endif
-
- return (chars_read);
- }
-
- close (file);
-
- /* Set TO to larger than end of file if negative. */
- if (to < 0)
- to = chars_read;
-
- /* Start at beginning of file, work to end. */
- bufend = buffer + chars_read;
- current_line = 0;
-
- /* Skip lines until we are at FROM. */
- for (line_start = line_end = buffer; line_end < bufend && current_line < from; line_end++)
- if (*line_end == '\n')
- {
- p = line_end + 1;
- /* If we see something we think is a timestamp, continue with this
- line. We should check more extensively here... */
- if (HIST_TIMESTAMP_START(p) == 0)
- current_line++;
- line_start = p;
- }
-
- /* If there are lines left to gobble, then gobble them now. */
- for (line_end = line_start; line_end < bufend; line_end++)
- if (*line_end == '\n')
- {
- /* Change to allow Windows-like \r\n end of line delimiter. */
- if (line_end > line_start && line_end[-1] == '\r')
- line_end[-1] = '\0';
- else
- *line_end = '\0';
-
- if (*line_start)
- {
- if (HIST_TIMESTAMP_START(line_start) == 0)
- {
- add_history (line_start);
- if (last_ts)
- {
- add_history_time (last_ts);
- last_ts = NULL;
- }
- }
- else
- {
- last_ts = line_start;
- current_line--;
- }
- }
-
- current_line++;
-
- if (current_line >= to)
- break;
-
- line_start = line_end + 1;
- }
-
- FREE (input);
-#ifndef HISTORY_USE_MMAP
- FREE (buffer);
-#else
- munmap (buffer, file_size);
-#endif
-
- return (0);
-}
-
-/* Truncate the history file FNAME, leaving only LINES trailing lines.
- If FNAME is NULL, then use ~/.history. Returns 0 on success, errno
- on failure. */
-int
-history_truncate_file (fname, lines)
- const char *fname;
- int lines;
-{
- char *buffer, *filename, *bp, *bp1; /* bp1 == bp+1 */
- int file, chars_read, rv;
- struct stat finfo;
- size_t file_size;
-
- buffer = (char *)NULL;
- filename = history_filename (fname);
- file = filename ? open (filename, O_RDONLY|O_BINARY, 0666) : -1;
- rv = 0;
-
- /* Don't try to truncate non-regular files. */
- if (file == -1 || fstat (file, &finfo) == -1)
- {
- rv = errno;
- if (file != -1)
- close (file);
- goto truncate_exit;
- }
-
- if (S_ISREG (finfo.st_mode) == 0)
- {
- close (file);
-#ifdef EFTYPE
- rv = EFTYPE;
-#else
- rv = EINVAL;
-#endif
- goto truncate_exit;
- }
-
- file_size = (size_t)finfo.st_size;
-
- /* check for overflow on very large files */
- if (file_size != finfo.st_size || file_size + 1 < file_size)
- {
- close (file);
-#if defined (EFBIG)
- rv = errno = EFBIG;
-#elif defined (EOVERFLOW)
- rv = errno = EOVERFLOW;
-#else
- rv = errno = EINVAL;
-#endif
- goto truncate_exit;
- }
-
- buffer = (char *)malloc (file_size + 1);
- if (buffer == 0)
- {
- close (file);
- goto truncate_exit;
- }
-
- chars_read = read (file, buffer, file_size);
- close (file);
-
- if (chars_read <= 0)
- {
- rv = (chars_read < 0) ? errno : 0;
- goto truncate_exit;
- }
-
- /* Count backwards from the end of buffer until we have passed
- LINES lines. bp1 is set funny initially. But since bp[1] can't
- be a comment character (since it's off the end) and *bp can't be
- both a newline and the history comment character, it should be OK. */
- for (bp1 = bp = buffer + chars_read - 1; lines && bp > buffer; bp--)
- {
- if (*bp == '\n' && HIST_TIMESTAMP_START(bp1) == 0)
- lines--;
- bp1 = bp;
- }
-
- /* If this is the first line, then the file contains exactly the
- number of lines we want to truncate to, so we don't need to do
- anything. It's the first line if we don't find a newline between
- the current value of i and 0. Otherwise, write from the start of
- this line until the end of the buffer. */
- for ( ; bp > buffer; bp--)
- {
- if (*bp == '\n' && HIST_TIMESTAMP_START(bp1) == 0)
- {
- bp++;
- break;
- }
- bp1 = bp;
- }
-
- /* Write only if there are more lines in the file than we want to
- truncate to. */
- if (bp > buffer && ((file = open (filename, O_WRONLY|O_TRUNC|O_BINARY, 0600)) != -1))
- {
- write (file, bp, chars_read - (bp - buffer));
-
-#if defined (__BEOS__)
- /* BeOS ignores O_TRUNC. */
- ftruncate (file, chars_read - (bp - buffer));
-#endif
-
- close (file);
- }
-
- truncate_exit:
-
- FREE (buffer);
-
- xfree (filename);
- return rv;
-}
-
-/* Workhorse function for writing history. Writes NELEMENT entries
- from the history list to FILENAME. OVERWRITE is non-zero if you
- wish to replace FILENAME with the entries. */
-static int
-history_do_write (filename, nelements, overwrite)
- const char *filename;
- int nelements, overwrite;
-{
- register int i;
- char *output, *bakname;
- int file, mode, rv;
-#ifdef HISTORY_USE_MMAP
- size_t cursize;
-
- mode = overwrite ? O_RDWR|O_CREAT|O_TRUNC|O_BINARY : O_RDWR|O_APPEND|O_BINARY;
-#else
- mode = overwrite ? O_WRONLY|O_CREAT|O_TRUNC|O_BINARY : O_WRONLY|O_APPEND|O_BINARY;
-#endif
- output = history_filename (filename);
- bakname = output ? history_backupfile (output) : 0;
-
- if (output && bakname)
- rename (output, bakname);
-
- file = output ? open (output, mode, 0600) : -1;
- rv = 0;
-
- if (file == -1)
- {
- rv = errno;
- if (output && bakname)
- rename (bakname, output);
- FREE (output);
- FREE (bakname);
- return (rv);
- }
-
-#ifdef HISTORY_USE_MMAP
- cursize = overwrite ? 0 : lseek (file, 0, SEEK_END);
-#endif
-
- if (nelements > history_length)
- nelements = history_length;
-
- /* Build a buffer of all the lines to write, and write them in one syscall.
- Suggested by Peter Ho (peter@robosts.oxford.ac.uk). */
- {
- HIST_ENTRY **the_history; /* local */
- register int j;
- int buffer_size;
- char *buffer;
-
- the_history = history_list ();
- /* Calculate the total number of bytes to write. */
- for (buffer_size = 0, i = history_length - nelements; i < history_length; i++)
-#if 0
- buffer_size += 2 + HISTENT_BYTES (the_history[i]);
-#else
- {
- if (history_write_timestamps && the_history[i]->timestamp && the_history[i]->timestamp[0])
- buffer_size += strlen (the_history[i]->timestamp) + 1;
- buffer_size += strlen (the_history[i]->line) + 1;
- }
-#endif
-
- /* Allocate the buffer, and fill it. */
-#ifdef HISTORY_USE_MMAP
- if (ftruncate (file, buffer_size+cursize) == -1)
- goto mmap_error;
- buffer = (char *)mmap (0, buffer_size, PROT_READ|PROT_WRITE, MAP_WFLAGS, file, cursize);
- if ((void *)buffer == MAP_FAILED)
- {
-mmap_error:
- rv = errno;
- close (file);
- if (output && bakname)
- rename (bakname, output);
- FREE (output);
- FREE (bakname);
- return rv;
- }
-#else
- buffer = (char *)malloc (buffer_size);
- if (buffer == 0)
- {
- rv = errno;
- close (file);
- if (output && bakname)
- rename (bakname, output);
- FREE (output);
- FREE (bakname);
- return rv;
- }
-#endif
-
- for (j = 0, i = history_length - nelements; i < history_length; i++)
- {
- if (history_write_timestamps && the_history[i]->timestamp && the_history[i]->timestamp[0])
- {
- strcpy (buffer + j, the_history[i]->timestamp);
- j += strlen (the_history[i]->timestamp);
- buffer[j++] = '\n';
- }
- strcpy (buffer + j, the_history[i]->line);
- j += strlen (the_history[i]->line);
- buffer[j++] = '\n';
- }
-
-#ifdef HISTORY_USE_MMAP
- if (msync (buffer, buffer_size, 0) != 0 || munmap (buffer, buffer_size) != 0)
- rv = errno;
-#else
- if (write (file, buffer, buffer_size) < 0)
- rv = errno;
- xfree (buffer);
-#endif
- }
-
- close (file);
-
- if (rv != 0 && output && bakname)
- rename (bakname, output);
- else if (rv == 0 && bakname)
- unlink (bakname);
-
- FREE (output);
- FREE (bakname);
-
- return (rv);
-}
-
-/* Append NELEMENT entries to FILENAME. The entries appended are from
- the end of the list minus NELEMENTs up to the end of the list. */
-int
-append_history (nelements, filename)
- int nelements;
- const char *filename;
-{
- return (history_do_write (filename, nelements, HISTORY_APPEND));
-}
-
-/* Overwrite FILENAME with the current history. If FILENAME is NULL,
- then write the history list to ~/.history. Values returned
- are as in read_history ().*/
-int
-write_history (filename)
- const char *filename;
-{
- return (history_do_write (filename, history_length, HISTORY_OVERWRITE));
-}
+++ /dev/null
-/* input.c -- character input functions for readline. */
-
-/* Copyright (C) 1994-2011 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (__TANDEM)
-# include <floss.h>
-#endif
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <sys/types.h>
-#include <fcntl.h>
-#if defined (HAVE_SYS_FILE_H)
-# include <sys/file.h>
-#endif /* HAVE_SYS_FILE_H */
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif /* HAVE_STDLIB_H */
-
-#include <signal.h>
-
-#include "posixselect.h"
-
-#if defined (FIONREAD_IN_SYS_IOCTL)
-# include <sys/ioctl.h>
-#endif
-
-#include <stdio.h>
-#include <errno.h>
-
-#if !defined (errno)
-extern int errno;
-#endif /* !errno */
-
-/* System-specific feature definitions and include files. */
-#include "rldefs.h"
-#include "rlmbutil.h"
-
-/* Some standard library routines. */
-#include "readline.h"
-
-#include "rlprivate.h"
-#include "rlshell.h"
-#include "xmalloc.h"
-
-/* What kind of non-blocking I/O do we have? */
-#if !defined (O_NDELAY) && defined (O_NONBLOCK)
-# define O_NDELAY O_NONBLOCK /* Posix style */
-#endif
-
-/* Non-null means it is a pointer to a function to run while waiting for
- character input. */
-rl_hook_func_t *rl_event_hook = (rl_hook_func_t *)NULL;
-
-rl_getc_func_t *rl_getc_function = rl_getc;
-
-static int _keyboard_input_timeout = 100000; /* 0.1 seconds; it's in usec */
-
-static int ibuffer_space PARAMS((void));
-static int rl_get_char PARAMS((int *));
-static int rl_gather_tyi PARAMS((void));
-
-/* **************************************************************** */
-/* */
-/* Character Input Buffering */
-/* */
-/* **************************************************************** */
-
-static int pop_index, push_index;
-static unsigned char ibuffer[512];
-static int ibuffer_len = sizeof (ibuffer) - 1;
-
-#define any_typein (push_index != pop_index)
-
-int
-_rl_any_typein ()
-{
- return any_typein;
-}
-
-/* Return the amount of space available in the buffer for stuffing
- characters. */
-static int
-ibuffer_space ()
-{
- if (pop_index > push_index)
- return (pop_index - push_index - 1);
- else
- return (ibuffer_len - (push_index - pop_index));
-}
-
-/* Get a key from the buffer of characters to be read.
- Return the key in KEY.
- Result is KEY if there was a key, or 0 if there wasn't. */
-static int
-rl_get_char (key)
- int *key;
-{
- if (push_index == pop_index)
- return (0);
-
- *key = ibuffer[pop_index++];
-#if 0
- if (pop_index >= ibuffer_len)
-#else
- if (pop_index > ibuffer_len)
-#endif
- pop_index = 0;
-
- return (1);
-}
-
-/* Stuff KEY into the *front* of the input buffer.
- Returns non-zero if successful, zero if there is
- no space left in the buffer. */
-int
-_rl_unget_char (key)
- int key;
-{
- if (ibuffer_space ())
- {
- pop_index--;
- if (pop_index < 0)
- pop_index = ibuffer_len;
- ibuffer[pop_index] = key;
- return (1);
- }
- return (0);
-}
-
-int
-_rl_pushed_input_available ()
-{
- return (push_index != pop_index);
-}
-
-/* If a character is available to be read, then read it and stuff it into
- IBUFFER. Otherwise, just return. Returns number of characters read
- (0 if none available) and -1 on error (EIO). */
-static int
-rl_gather_tyi ()
-{
- int tty;
- register int tem, result;
- int chars_avail, k;
- char input;
-#if defined(HAVE_SELECT)
- fd_set readfds, exceptfds;
- struct timeval timeout;
-#endif
-
- chars_avail = 0;
- tty = fileno (rl_instream);
-
-#if defined (HAVE_SELECT)
- FD_ZERO (&readfds);
- FD_ZERO (&exceptfds);
- FD_SET (tty, &readfds);
- FD_SET (tty, &exceptfds);
- USEC_TO_TIMEVAL (_keyboard_input_timeout, timeout);
- result = select (tty + 1, &readfds, (fd_set *)NULL, &exceptfds, &timeout);
- if (result <= 0)
- return 0; /* Nothing to read. */
-#endif
-
- result = -1;
-#if defined (FIONREAD)
- errno = 0;
- result = ioctl (tty, FIONREAD, &chars_avail);
- if (result == -1 && errno == EIO)
- return -1;
-#endif
-
-#if defined (O_NDELAY)
- if (result == -1)
- {
- tem = fcntl (tty, F_GETFL, 0);
-
- fcntl (tty, F_SETFL, (tem | O_NDELAY));
- chars_avail = read (tty, &input, 1);
-
- fcntl (tty, F_SETFL, tem);
- if (chars_avail == -1 && errno == EAGAIN)
- return 0;
- if (chars_avail == 0) /* EOF */
- {
- rl_stuff_char (EOF);
- return (0);
- }
- }
-#endif /* O_NDELAY */
-
-#if defined (__MINGW32__)
- /* Use getch/_kbhit to check for available console input, in the same way
- that we read it normally. */
- chars_avail = isatty (tty) ? _kbhit () : 0;
- result = 0;
-#endif
-
- /* If there's nothing available, don't waste time trying to read
- something. */
- if (chars_avail <= 0)
- return 0;
-
- tem = ibuffer_space ();
-
- if (chars_avail > tem)
- chars_avail = tem;
-
- /* One cannot read all of the available input. I can only read a single
- character at a time, or else programs which require input can be
- thwarted. If the buffer is larger than one character, I lose.
- Damn! */
- if (tem < ibuffer_len)
- chars_avail = 0;
-
- if (result != -1)
- {
- while (chars_avail--)
- {
- RL_CHECK_SIGNALS ();
- k = (*rl_getc_function) (rl_instream);
- if (rl_stuff_char (k) == 0)
- break; /* some problem; no more room */
- if (k == NEWLINE || k == RETURN)
- break;
- }
- }
- else
- {
- if (chars_avail)
- rl_stuff_char (input);
- }
-
- return 1;
-}
-
-int
-rl_set_keyboard_input_timeout (u)
- int u;
-{
- int o;
-
- o = _keyboard_input_timeout;
- if (u >= 0)
- _keyboard_input_timeout = u;
- return (o);
-}
-
-/* Is there input available to be read on the readline input file
- descriptor? Only works if the system has select(2) or FIONREAD.
- Uses the value of _keyboard_input_timeout as the timeout; if another
- readline function wants to specify a timeout and not leave it up to
- the user, it should use _rl_input_queued(timeout_value_in_microseconds)
- instead. */
-int
-_rl_input_available ()
-{
-#if defined(HAVE_SELECT)
- fd_set readfds, exceptfds;
- struct timeval timeout;
-#endif
-#if !defined (HAVE_SELECT) && defined(FIONREAD)
- int chars_avail;
-#endif
- int tty;
-
- tty = fileno (rl_instream);
-
-#if defined (HAVE_SELECT)
- FD_ZERO (&readfds);
- FD_ZERO (&exceptfds);
- FD_SET (tty, &readfds);
- FD_SET (tty, &exceptfds);
- timeout.tv_sec = 0;
- timeout.tv_usec = _keyboard_input_timeout;
- return (select (tty + 1, &readfds, (fd_set *)NULL, &exceptfds, &timeout) > 0);
-#else
-
-#if defined (FIONREAD)
- if (ioctl (tty, FIONREAD, &chars_avail) == 0)
- return (chars_avail);
-#endif
-
-#endif
-
-#if defined (__MINGW32__)
- if (isatty (tty))
- return (_kbhit ());
-#endif
-
- return 0;
-}
-
-int
-_rl_input_queued (t)
- int t;
-{
- int old_timeout, r;
-
- old_timeout = rl_set_keyboard_input_timeout (t);
- r = _rl_input_available ();
- rl_set_keyboard_input_timeout (old_timeout);
- return r;
-}
-
-void
-_rl_insert_typein (c)
- int c;
-{
- int key, t, i;
- char *string;
-
- i = key = 0;
- string = (char *)xmalloc (ibuffer_len + 1);
- string[i++] = (char) c;
-
- while ((t = rl_get_char (&key)) &&
- _rl_keymap[key].type == ISFUNC &&
- _rl_keymap[key].function == rl_insert)
- string[i++] = key;
-
- if (t)
- _rl_unget_char (key);
-
- string[i] = '\0';
- rl_insert_text (string);
- xfree (string);
-}
-
-/* Add KEY to the buffer of characters to be read. Returns 1 if the
- character was stuffed correctly; 0 otherwise. */
-int
-rl_stuff_char (key)
- int key;
-{
- if (ibuffer_space () == 0)
- return 0;
-
- if (key == EOF)
- {
- key = NEWLINE;
- rl_pending_input = EOF;
- RL_SETSTATE (RL_STATE_INPUTPENDING);
- }
- ibuffer[push_index++] = key;
-#if 0
- if (push_index >= ibuffer_len)
-#else
- if (push_index > ibuffer_len)
-#endif
- push_index = 0;
-
- return 1;
-}
-
-/* Make C be the next command to be executed. */
-int
-rl_execute_next (c)
- int c;
-{
- rl_pending_input = c;
- RL_SETSTATE (RL_STATE_INPUTPENDING);
- return 0;
-}
-
-/* Clear any pending input pushed with rl_execute_next() */
-int
-rl_clear_pending_input ()
-{
- rl_pending_input = 0;
- RL_UNSETSTATE (RL_STATE_INPUTPENDING);
- return 0;
-}
-
-/* **************************************************************** */
-/* */
-/* Character Input */
-/* */
-/* **************************************************************** */
-
-/* Read a key, including pending input. */
-int
-rl_read_key ()
-{
- int c;
-
- rl_key_sequence_length++;
-
- if (rl_pending_input)
- {
- c = rl_pending_input;
- rl_clear_pending_input ();
- }
- else
- {
- /* If input is coming from a macro, then use that. */
- if (c = _rl_next_macro_key ())
- return (c);
-
- /* If the user has an event function, then call it periodically. */
- if (rl_event_hook)
- {
- while (rl_event_hook)
- {
- if (rl_gather_tyi () < 0) /* XXX - EIO */
- {
- rl_done = 1;
- return ('\n');
- }
- RL_CHECK_SIGNALS ();
- if (rl_get_char (&c) != 0)
- break;
- if (rl_done) /* XXX - experimental */
- return ('\n');
- (*rl_event_hook) ();
- }
- }
- else
- {
- if (rl_get_char (&c) == 0)
- c = (*rl_getc_function) (rl_instream);
- RL_CHECK_SIGNALS ();
- }
- }
-
- return (c);
-}
-
-int
-rl_getc (stream)
- FILE *stream;
-{
- int result;
- unsigned char c;
-
- while (1)
- {
- RL_CHECK_SIGNALS ();
-
- /* We know at this point that _rl_caught_signal == 0 */
-
-#if defined (__MINGW32__)
- if (isatty (fileno (stream)))
- return (getch ());
-#endif
- result = read (fileno (stream), &c, sizeof (unsigned char));
-
-if (_rl_caught_signal)
- {
-itrace("rl_getc: caught SIGWINCH: %d", _rl_caught_signal);
- _rl_caught_signal = 0;
- }
-
- if (result == sizeof (unsigned char))
- return (c);
-
- /* If zero characters are returned, then the file that we are
- reading from is empty! Return EOF in that case. */
- if (result == 0)
- return (EOF);
-
-#if defined (__BEOS__)
- if (errno == EINTR)
- continue;
-#endif
-
-#if defined (EWOULDBLOCK)
-# define X_EWOULDBLOCK EWOULDBLOCK
-#else
-# define X_EWOULDBLOCK -99
-#endif
-
-#if defined (EAGAIN)
-# define X_EAGAIN EAGAIN
-#else
-# define X_EAGAIN -99
-#endif
-
- if (errno == X_EWOULDBLOCK || errno == X_EAGAIN)
- {
- if (sh_unset_nodelay_mode (fileno (stream)) < 0)
- return (EOF);
- continue;
- }
-
-#undef X_EWOULDBLOCK
-#undef X_EAGAIN
-
- /* If the error that we received was EINTR, then try again,
- this is simply an interrupted system call to read ().
- Otherwise, some error ocurred, also signifying EOF. */
- if (errno != EINTR)
- return (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF);
- else if (_rl_caught_signal == SIGHUP || _rl_caught_signal == SIGTERM)
- return (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF);
- else if (rl_event_hook)
- (*rl_event_hook) ();
- }
-}
-
-#if defined (HANDLE_MULTIBYTE)
-/* read multibyte char */
-int
-_rl_read_mbchar (mbchar, size)
- char *mbchar;
- int size;
-{
- int mb_len, c;
- size_t mbchar_bytes_length;
- wchar_t wc;
- mbstate_t ps, ps_back;
-
- memset(&ps, 0, sizeof (mbstate_t));
- memset(&ps_back, 0, sizeof (mbstate_t));
-
- mb_len = 0;
- while (mb_len < size)
- {
- RL_SETSTATE(RL_STATE_MOREINPUT);
- c = rl_read_key ();
- RL_UNSETSTATE(RL_STATE_MOREINPUT);
-
- if (c < 0)
- break;
-
- mbchar[mb_len++] = c;
-
- mbchar_bytes_length = mbrtowc (&wc, mbchar, mb_len, &ps);
- if (mbchar_bytes_length == (size_t)(-1))
- break; /* invalid byte sequence for the current locale */
- else if (mbchar_bytes_length == (size_t)(-2))
- {
- /* shorted bytes */
- ps = ps_back;
- continue;
- }
- else if (mbchar_bytes_length == 0)
- {
- mbchar[0] = '\0'; /* null wide character */
- mb_len = 1;
- break;
- }
- else if (mbchar_bytes_length > (size_t)(0))
- break;
- }
-
- return mb_len;
-}
-
-/* Read a multibyte-character string whose first character is FIRST into
- the buffer MB of length MLEN. Returns the last character read, which
- may be FIRST. Used by the search functions, among others. Very similar
- to _rl_read_mbchar. */
-int
-_rl_read_mbstring (first, mb, mlen)
- int first;
- char *mb;
- int mlen;
-{
- int i, c;
- mbstate_t ps;
-
- c = first;
- memset (mb, 0, mlen);
- for (i = 0; c >= 0 && i < mlen; i++)
- {
- mb[i] = (char)c;
- memset (&ps, 0, sizeof (mbstate_t));
- if (_rl_get_char_len (mb, &ps) == -2)
- {
- /* Read more for multibyte character */
- RL_SETSTATE (RL_STATE_MOREINPUT);
- c = rl_read_key ();
- RL_UNSETSTATE (RL_STATE_MOREINPUT);
- }
- else
- break;
- }
- return c;
-}
-#endif /* HANDLE_MULTIBYTE */
+++ /dev/null
-/* Readline.h -- the names of functions callable from within readline. */
-
-/* Copyright (C) 1987-2011 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined (_READLINE_H_)
-#define _READLINE_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if defined (READLINE_LIBRARY)
-# include "rlstdc.h"
-# include "rltypedefs.h"
-# include "keymaps.h"
-# include "tilde.h"
-#else
-# include <readline/rlstdc.h>
-# include <readline/rltypedefs.h>
-# include <readline/keymaps.h>
-# include <readline/tilde.h>
-#endif
-
-/* Hex-encoded Readline version number. */
-#define RL_READLINE_VERSION 0x0602 /* Readline 6.2 */
-#define RL_VERSION_MAJOR 6
-#define RL_VERSION_MINOR 2
-
-/* Readline data structures. */
-
-/* Maintaining the state of undo. We remember individual deletes and inserts
- on a chain of things to do. */
-
-/* The actions that undo knows how to undo. Notice that UNDO_DELETE means
- to insert some text, and UNDO_INSERT means to delete some text. I.e.,
- the code tells undo what to undo, not how to undo it. */
-enum undo_code { UNDO_DELETE, UNDO_INSERT, UNDO_BEGIN, UNDO_END };
-
-/* What an element of THE_UNDO_LIST looks like. */
-typedef struct undo_list {
- struct undo_list *next;
- int start, end; /* Where the change took place. */
- char *text; /* The text to insert, if undoing a delete. */
- enum undo_code what; /* Delete, Insert, Begin, End. */
-} UNDO_LIST;
-
-/* The current undo list for RL_LINE_BUFFER. */
-extern UNDO_LIST *rl_undo_list;
-
-/* The data structure for mapping textual names to code addresses. */
-typedef struct _funmap {
- const char *name;
- rl_command_func_t *function;
-} FUNMAP;
-
-extern FUNMAP **funmap;
-
-/* **************************************************************** */
-/* */
-/* Functions available to bind to key sequences */
-/* */
-/* **************************************************************** */
-
-/* Bindable commands for numeric arguments. */
-extern int rl_digit_argument PARAMS((int, int));
-extern int rl_universal_argument PARAMS((int, int));
-
-/* Bindable commands for moving the cursor. */
-extern int rl_forward_byte PARAMS((int, int));
-extern int rl_forward_char PARAMS((int, int));
-extern int rl_forward PARAMS((int, int));
-extern int rl_backward_byte PARAMS((int, int));
-extern int rl_backward_char PARAMS((int, int));
-extern int rl_backward PARAMS((int, int));
-extern int rl_beg_of_line PARAMS((int, int));
-extern int rl_end_of_line PARAMS((int, int));
-extern int rl_forward_word PARAMS((int, int));
-extern int rl_backward_word PARAMS((int, int));
-extern int rl_refresh_line PARAMS((int, int));
-extern int rl_clear_screen PARAMS((int, int));
-extern int rl_skip_csi_sequence PARAMS((int, int));
-extern int rl_arrow_keys PARAMS((int, int));
-
-/* Bindable commands for inserting and deleting text. */
-extern int rl_insert PARAMS((int, int));
-extern int rl_quoted_insert PARAMS((int, int));
-extern int rl_tab_insert PARAMS((int, int));
-extern int rl_newline PARAMS((int, int));
-extern int rl_do_lowercase_version PARAMS((int, int));
-extern int rl_rubout PARAMS((int, int));
-extern int rl_delete PARAMS((int, int));
-extern int rl_rubout_or_delete PARAMS((int, int));
-extern int rl_delete_horizontal_space PARAMS((int, int));
-extern int rl_delete_or_show_completions PARAMS((int, int));
-extern int rl_insert_comment PARAMS((int, int));
-
-/* Bindable commands for changing case. */
-extern int rl_upcase_word PARAMS((int, int));
-extern int rl_downcase_word PARAMS((int, int));
-extern int rl_capitalize_word PARAMS((int, int));
-
-/* Bindable commands for transposing characters and words. */
-extern int rl_transpose_words PARAMS((int, int));
-extern int rl_transpose_chars PARAMS((int, int));
-
-/* Bindable commands for searching within a line. */
-extern int rl_char_search PARAMS((int, int));
-extern int rl_backward_char_search PARAMS((int, int));
-
-/* Bindable commands for readline's interface to the command history. */
-extern int rl_beginning_of_history PARAMS((int, int));
-extern int rl_end_of_history PARAMS((int, int));
-extern int rl_get_next_history PARAMS((int, int));
-extern int rl_get_previous_history PARAMS((int, int));
-
-/* Bindable commands for managing the mark and region. */
-extern int rl_set_mark PARAMS((int, int));
-extern int rl_exchange_point_and_mark PARAMS((int, int));
-
-/* Bindable commands to set the editing mode (emacs or vi). */
-extern int rl_vi_editing_mode PARAMS((int, int));
-extern int rl_emacs_editing_mode PARAMS((int, int));
-
-/* Bindable commands to change the insert mode (insert or overwrite) */
-extern int rl_overwrite_mode PARAMS((int, int));
-
-/* Bindable commands for managing key bindings. */
-extern int rl_re_read_init_file PARAMS((int, int));
-extern int rl_dump_functions PARAMS((int, int));
-extern int rl_dump_macros PARAMS((int, int));
-extern int rl_dump_variables PARAMS((int, int));
-
-/* Bindable commands for word completion. */
-extern int rl_complete PARAMS((int, int));
-extern int rl_possible_completions PARAMS((int, int));
-extern int rl_insert_completions PARAMS((int, int));
-extern int rl_old_menu_complete PARAMS((int, int));
-extern int rl_menu_complete PARAMS((int, int));
-extern int rl_backward_menu_complete PARAMS((int, int));
-
-/* Bindable commands for killing and yanking text, and managing the kill ring. */
-extern int rl_kill_word PARAMS((int, int));
-extern int rl_backward_kill_word PARAMS((int, int));
-extern int rl_kill_line PARAMS((int, int));
-extern int rl_backward_kill_line PARAMS((int, int));
-extern int rl_kill_full_line PARAMS((int, int));
-extern int rl_unix_word_rubout PARAMS((int, int));
-extern int rl_unix_filename_rubout PARAMS((int, int));
-extern int rl_unix_line_discard PARAMS((int, int));
-extern int rl_copy_region_to_kill PARAMS((int, int));
-extern int rl_kill_region PARAMS((int, int));
-extern int rl_copy_forward_word PARAMS((int, int));
-extern int rl_copy_backward_word PARAMS((int, int));
-extern int rl_yank PARAMS((int, int));
-extern int rl_yank_pop PARAMS((int, int));
-extern int rl_yank_nth_arg PARAMS((int, int));
-extern int rl_yank_last_arg PARAMS((int, int));
-/* Not available unless __CYGWIN__ is defined. */
-#ifdef __CYGWIN__
-extern int rl_paste_from_clipboard PARAMS((int, int));
-#endif
-
-/* Bindable commands for incremental searching. */
-extern int rl_reverse_search_history PARAMS((int, int));
-extern int rl_forward_search_history PARAMS((int, int));
-
-/* Bindable keyboard macro commands. */
-extern int rl_start_kbd_macro PARAMS((int, int));
-extern int rl_end_kbd_macro PARAMS((int, int));
-extern int rl_call_last_kbd_macro PARAMS((int, int));
-
-/* Bindable undo commands. */
-extern int rl_revert_line PARAMS((int, int));
-extern int rl_undo_command PARAMS((int, int));
-
-/* Bindable tilde expansion commands. */
-extern int rl_tilde_expand PARAMS((int, int));
-
-/* Bindable terminal control commands. */
-extern int rl_restart_output PARAMS((int, int));
-extern int rl_stop_output PARAMS((int, int));
-
-/* Miscellaneous bindable commands. */
-extern int rl_abort PARAMS((int, int));
-extern int rl_tty_status PARAMS((int, int));
-
-/* Bindable commands for incremental and non-incremental history searching. */
-extern int rl_history_search_forward PARAMS((int, int));
-extern int rl_history_search_backward PARAMS((int, int));
-extern int rl_noninc_forward_search PARAMS((int, int));
-extern int rl_noninc_reverse_search PARAMS((int, int));
-extern int rl_noninc_forward_search_again PARAMS((int, int));
-extern int rl_noninc_reverse_search_again PARAMS((int, int));
-
-/* Bindable command used when inserting a matching close character. */
-extern int rl_insert_close PARAMS((int, int));
-
-/* Not available unless READLINE_CALLBACKS is defined. */
-extern void rl_callback_handler_install PARAMS((const char *, rl_vcpfunc_t *));
-extern void rl_callback_read_char PARAMS((void));
-extern void rl_callback_handler_remove PARAMS((void));
-
-/* Things for vi mode. Not available unless readline is compiled -DVI_MODE. */
-/* VI-mode bindable commands. */
-extern int rl_vi_redo PARAMS((int, int));
-extern int rl_vi_undo PARAMS((int, int));
-extern int rl_vi_yank_arg PARAMS((int, int));
-extern int rl_vi_fetch_history PARAMS((int, int));
-extern int rl_vi_search_again PARAMS((int, int));
-extern int rl_vi_search PARAMS((int, int));
-extern int rl_vi_complete PARAMS((int, int));
-extern int rl_vi_tilde_expand PARAMS((int, int));
-extern int rl_vi_prev_word PARAMS((int, int));
-extern int rl_vi_next_word PARAMS((int, int));
-extern int rl_vi_end_word PARAMS((int, int));
-extern int rl_vi_insert_beg PARAMS((int, int));
-extern int rl_vi_append_mode PARAMS((int, int));
-extern int rl_vi_append_eol PARAMS((int, int));
-extern int rl_vi_eof_maybe PARAMS((int, int));
-extern int rl_vi_insertion_mode PARAMS((int, int));
-extern int rl_vi_insert_mode PARAMS((int, int));
-extern int rl_vi_movement_mode PARAMS((int, int));
-extern int rl_vi_arg_digit PARAMS((int, int));
-extern int rl_vi_change_case PARAMS((int, int));
-extern int rl_vi_put PARAMS((int, int));
-extern int rl_vi_column PARAMS((int, int));
-extern int rl_vi_delete_to PARAMS((int, int));
-extern int rl_vi_change_to PARAMS((int, int));
-extern int rl_vi_yank_to PARAMS((int, int));
-extern int rl_vi_rubout PARAMS((int, int));
-extern int rl_vi_delete PARAMS((int, int));
-extern int rl_vi_back_to_indent PARAMS((int, int));
-extern int rl_vi_first_print PARAMS((int, int));
-extern int rl_vi_char_search PARAMS((int, int));
-extern int rl_vi_match PARAMS((int, int));
-extern int rl_vi_change_char PARAMS((int, int));
-extern int rl_vi_subst PARAMS((int, int));
-extern int rl_vi_overstrike PARAMS((int, int));
-extern int rl_vi_overstrike_delete PARAMS((int, int));
-extern int rl_vi_replace PARAMS((int, int));
-extern int rl_vi_set_mark PARAMS((int, int));
-extern int rl_vi_goto_mark PARAMS((int, int));
-
-/* VI-mode utility functions. */
-extern int rl_vi_check PARAMS((void));
-extern int rl_vi_domove PARAMS((int, int *));
-extern int rl_vi_bracktype PARAMS((int));
-
-extern void rl_vi_start_inserting PARAMS((int, int, int));
-
-/* VI-mode pseudo-bindable commands, used as utility functions. */
-extern int rl_vi_fWord PARAMS((int, int));
-extern int rl_vi_bWord PARAMS((int, int));
-extern int rl_vi_eWord PARAMS((int, int));
-extern int rl_vi_fword PARAMS((int, int));
-extern int rl_vi_bword PARAMS((int, int));
-extern int rl_vi_eword PARAMS((int, int));
-
-/* **************************************************************** */
-/* */
-/* Well Published Functions */
-/* */
-/* **************************************************************** */
-
-/* Readline functions. */
-/* Read a line of input. Prompt with PROMPT. A NULL PROMPT means none. */
-extern char *readline PARAMS((const char *));
-
-extern int rl_set_prompt PARAMS((const char *));
-extern int rl_expand_prompt PARAMS((char *));
-
-extern int rl_initialize PARAMS((void));
-
-/* Undocumented; unused by readline */
-extern int rl_discard_argument PARAMS((void));
-
-/* Utility functions to bind keys to readline commands. */
-extern int rl_add_defun PARAMS((const char *, rl_command_func_t *, int));
-extern int rl_bind_key PARAMS((int, rl_command_func_t *));
-extern int rl_bind_key_in_map PARAMS((int, rl_command_func_t *, Keymap));
-extern int rl_unbind_key PARAMS((int));
-extern int rl_unbind_key_in_map PARAMS((int, Keymap));
-extern int rl_bind_key_if_unbound PARAMS((int, rl_command_func_t *));
-extern int rl_bind_key_if_unbound_in_map PARAMS((int, rl_command_func_t *, Keymap));
-extern int rl_unbind_function_in_map PARAMS((rl_command_func_t *, Keymap));
-extern int rl_unbind_command_in_map PARAMS((const char *, Keymap));
-extern int rl_bind_keyseq PARAMS((const char *, rl_command_func_t *));
-extern int rl_bind_keyseq_in_map PARAMS((const char *, rl_command_func_t *, Keymap));
-extern int rl_bind_keyseq_if_unbound PARAMS((const char *, rl_command_func_t *));
-extern int rl_bind_keyseq_if_unbound_in_map PARAMS((const char *, rl_command_func_t *, Keymap));
-extern int rl_generic_bind PARAMS((int, const char *, char *, Keymap));
-
-extern char *rl_variable_value PARAMS((const char *));
-extern int rl_variable_bind PARAMS((const char *, const char *));
-
-/* Backwards compatibility, use rl_bind_keyseq_in_map instead. */
-extern int rl_set_key PARAMS((const char *, rl_command_func_t *, Keymap));
-
-/* Backwards compatibility, use rl_generic_bind instead. */
-extern int rl_macro_bind PARAMS((const char *, const char *, Keymap));
-
-/* Undocumented in the texinfo manual; not really useful to programs. */
-extern int rl_translate_keyseq PARAMS((const char *, char *, int *));
-extern char *rl_untranslate_keyseq PARAMS((int));
-
-extern rl_command_func_t *rl_named_function PARAMS((const char *));
-extern rl_command_func_t *rl_function_of_keyseq PARAMS((const char *, Keymap, int *));
-
-extern void rl_list_funmap_names PARAMS((void));
-extern char **rl_invoking_keyseqs_in_map PARAMS((rl_command_func_t *, Keymap));
-extern char **rl_invoking_keyseqs PARAMS((rl_command_func_t *));
-
-extern void rl_function_dumper PARAMS((int));
-extern void rl_macro_dumper PARAMS((int));
-extern void rl_variable_dumper PARAMS((int));
-
-extern int rl_read_init_file PARAMS((const char *));
-extern int rl_parse_and_bind PARAMS((char *));
-
-/* Functions for manipulating keymaps. */
-extern Keymap rl_make_bare_keymap PARAMS((void));
-extern Keymap rl_copy_keymap PARAMS((Keymap));
-extern Keymap rl_make_keymap PARAMS((void));
-extern void rl_discard_keymap PARAMS((Keymap));
-
-extern Keymap rl_get_keymap_by_name PARAMS((const char *));
-extern char *rl_get_keymap_name PARAMS((Keymap));
-extern void rl_set_keymap PARAMS((Keymap));
-extern Keymap rl_get_keymap PARAMS((void));
-/* Undocumented; used internally only. */
-extern void rl_set_keymap_from_edit_mode PARAMS((void));
-extern char *rl_get_keymap_name_from_edit_mode PARAMS((void));
-
-/* Functions for manipulating the funmap, which maps command names to functions. */
-extern int rl_add_funmap_entry PARAMS((const char *, rl_command_func_t *));
-extern const char **rl_funmap_names PARAMS((void));
-/* Undocumented, only used internally -- there is only one funmap, and this
- function may be called only once. */
-extern void rl_initialize_funmap PARAMS((void));
-
-/* Utility functions for managing keyboard macros. */
-extern void rl_push_macro_input PARAMS((char *));
-
-/* Functions for undoing, from undo.c */
-extern void rl_add_undo PARAMS((enum undo_code, int, int, char *));
-extern void rl_free_undo_list PARAMS((void));
-extern int rl_do_undo PARAMS((void));
-extern int rl_begin_undo_group PARAMS((void));
-extern int rl_end_undo_group PARAMS((void));
-extern int rl_modifying PARAMS((int, int));
-
-/* Functions for redisplay. */
-extern void rl_redisplay PARAMS((void));
-extern int rl_on_new_line PARAMS((void));
-extern int rl_on_new_line_with_prompt PARAMS((void));
-extern int rl_forced_update_display PARAMS((void));
-extern int rl_clear_message PARAMS((void));
-extern int rl_reset_line_state PARAMS((void));
-extern int rl_crlf PARAMS((void));
-
-#if defined (USE_VARARGS) && defined (PREFER_STDARG)
-extern int rl_message (const char *, ...) __attribute__((__format__ (printf, 1, 2)));
-#else
-extern int rl_message ();
-#endif
-
-extern int rl_show_char PARAMS((int));
-
-/* Undocumented in texinfo manual. */
-extern int rl_character_len PARAMS((int, int));
-
-/* Save and restore internal prompt redisplay information. */
-extern void rl_save_prompt PARAMS((void));
-extern void rl_restore_prompt PARAMS((void));
-
-/* Modifying text. */
-extern void rl_replace_line PARAMS((const char *, int));
-extern int rl_insert_text PARAMS((const char *));
-extern int rl_delete_text PARAMS((int, int));
-extern int rl_kill_text PARAMS((int, int));
-extern char *rl_copy_text PARAMS((int, int));
-
-/* Terminal and tty mode management. */
-extern void rl_prep_terminal PARAMS((int));
-extern void rl_deprep_terminal PARAMS((void));
-extern void rl_tty_set_default_bindings PARAMS((Keymap));
-extern void rl_tty_unset_default_bindings PARAMS((Keymap));
-
-extern int rl_reset_terminal PARAMS((const char *));
-extern void rl_resize_terminal PARAMS((void));
-extern void rl_set_screen_size PARAMS((int, int));
-extern void rl_get_screen_size PARAMS((int *, int *));
-extern void rl_reset_screen_size PARAMS((void));
-
-extern char *rl_get_termcap PARAMS((const char *));
-
-/* Functions for character input. */
-extern int rl_stuff_char PARAMS((int));
-extern int rl_execute_next PARAMS((int));
-extern int rl_clear_pending_input PARAMS((void));
-extern int rl_read_key PARAMS((void));
-extern int rl_getc PARAMS((FILE *));
-extern int rl_set_keyboard_input_timeout PARAMS((int));
-
-/* `Public' utility functions . */
-extern void rl_extend_line_buffer PARAMS((int));
-extern int rl_ding PARAMS((void));
-extern int rl_alphabetic PARAMS((int));
-extern void rl_free PARAMS((void *));
-
-/* Readline signal handling, from signals.c */
-extern int rl_set_signals PARAMS((void));
-extern int rl_clear_signals PARAMS((void));
-extern void rl_cleanup_after_signal PARAMS((void));
-extern void rl_reset_after_signal PARAMS((void));
-extern void rl_free_line_state PARAMS((void));
-
-extern void rl_echo_signal_char PARAMS((int));
-
-extern int rl_set_paren_blink_timeout PARAMS((int));
-
-/* Undocumented. */
-extern int rl_maybe_save_line PARAMS((void));
-extern int rl_maybe_unsave_line PARAMS((void));
-extern int rl_maybe_replace_line PARAMS((void));
-
-/* Completion functions. */
-extern int rl_complete_internal PARAMS((int));
-extern void rl_display_match_list PARAMS((char **, int, int));
-
-extern char **rl_completion_matches PARAMS((const char *, rl_compentry_func_t *));
-extern char *rl_username_completion_function PARAMS((const char *, int));
-extern char *rl_filename_completion_function PARAMS((const char *, int));
-
-extern int rl_completion_mode PARAMS((rl_command_func_t *));
-
-#if 0
-/* Backwards compatibility (compat.c). These will go away sometime. */
-extern void free_undo_list PARAMS((void));
-extern int maybe_save_line PARAMS((void));
-extern int maybe_unsave_line PARAMS((void));
-extern int maybe_replace_line PARAMS((void));
-
-extern int ding PARAMS((void));
-extern int alphabetic PARAMS((int));
-extern int crlf PARAMS((void));
-
-extern char **completion_matches PARAMS((char *, rl_compentry_func_t *));
-extern char *username_completion_function PARAMS((const char *, int));
-extern char *filename_completion_function PARAMS((const char *, int));
-#endif
-
-/* **************************************************************** */
-/* */
-/* Well Published Variables */
-/* */
-/* **************************************************************** */
-
-/* The version of this incarnation of the readline library. */
-extern const char *rl_library_version; /* e.g., "4.2" */
-extern int rl_readline_version; /* e.g., 0x0402 */
-
-/* True if this is real GNU readline. */
-extern int rl_gnu_readline_p;
-
-/* Flags word encapsulating the current readline state. */
-extern int rl_readline_state;
-
-/* Says which editing mode readline is currently using. 1 means emacs mode;
- 0 means vi mode. */
-extern int rl_editing_mode;
-
-/* Insert or overwrite mode for emacs mode. 1 means insert mode; 0 means
- overwrite mode. Reset to insert mode on each input line. */
-extern int rl_insert_mode;
-
-/* The name of the calling program. You should initialize this to
- whatever was in argv[0]. It is used when parsing conditionals. */
-extern const char *rl_readline_name;
-
-/* The prompt readline uses. This is set from the argument to
- readline (), and should not be assigned to directly. */
-extern char *rl_prompt;
-
-/* The prompt string that is actually displayed by rl_redisplay. Public so
- applications can more easily supply their own redisplay functions. */
-extern char *rl_display_prompt;
-
-/* The line buffer that is in use. */
-extern char *rl_line_buffer;
-
-/* The location of point, and end. */
-extern int rl_point;
-extern int rl_end;
-
-/* The mark, or saved cursor position. */
-extern int rl_mark;
-
-/* Flag to indicate that readline has finished with the current input
- line and should return it. */
-extern int rl_done;
-
-/* If set to a character value, that will be the next keystroke read. */
-extern int rl_pending_input;
-
-/* Non-zero if we called this function from _rl_dispatch(). It's present
- so functions can find out whether they were called from a key binding
- or directly from an application. */
-extern int rl_dispatching;
-
-/* Non-zero if the user typed a numeric argument before executing the
- current function. */
-extern int rl_explicit_arg;
-
-/* The current value of the numeric argument specified by the user. */
-extern int rl_numeric_arg;
-
-/* The address of the last command function Readline executed. */
-extern rl_command_func_t *rl_last_func;
-
-/* The name of the terminal to use. */
-extern const char *rl_terminal_name;
-
-/* The input and output streams. */
-extern FILE *rl_instream;
-extern FILE *rl_outstream;
-
-/* If non-zero, Readline gives values of LINES and COLUMNS from the environment
- greater precedence than values fetched from the kernel when computing the
- screen dimensions. */
-extern int rl_prefer_env_winsize;
-
-/* If non-zero, then this is the address of a function to call just
- before readline_internal () prints the first prompt. */
-extern rl_hook_func_t *rl_startup_hook;
-
-/* If non-zero, this is the address of a function to call just before
- readline_internal_setup () returns and readline_internal starts
- reading input characters. */
-extern rl_hook_func_t *rl_pre_input_hook;
-
-/* The address of a function to call periodically while Readline is
- awaiting character input, or NULL, for no event handling. */
-extern rl_hook_func_t *rl_event_hook;
-
-/* The address of the function to call to fetch a character from the current
- Readline input stream */
-extern rl_getc_func_t *rl_getc_function;
-
-extern rl_voidfunc_t *rl_redisplay_function;
-
-extern rl_vintfunc_t *rl_prep_term_function;
-extern rl_voidfunc_t *rl_deprep_term_function;
-
-/* Dispatch variables. */
-extern Keymap rl_executing_keymap;
-extern Keymap rl_binding_keymap;
-
-/* Display variables. */
-/* If non-zero, readline will erase the entire line, including any prompt,
- if the only thing typed on an otherwise-blank line is something bound to
- rl_newline. */
-extern int rl_erase_empty_line;
-
-/* If non-zero, the application has already printed the prompt (rl_prompt)
- before calling readline, so readline should not output it the first time
- redisplay is done. */
-extern int rl_already_prompted;
-
-/* A non-zero value means to read only this many characters rather than
- up to a character bound to accept-line. */
-extern int rl_num_chars_to_read;
-
-/* The text of a currently-executing keyboard macro. */
-extern char *rl_executing_macro;
-
-/* Variables to control readline signal handling. */
-/* If non-zero, readline will install its own signal handlers for
- SIGINT, SIGTERM, SIGQUIT, SIGALRM, SIGTSTP, SIGTTIN, and SIGTTOU. */
-extern int rl_catch_signals;
-
-/* If non-zero, readline will install a signal handler for SIGWINCH
- that also attempts to call any calling application's SIGWINCH signal
- handler. Note that the terminal is not cleaned up before the
- application's signal handler is called; use rl_cleanup_after_signal()
- to do that. */
-extern int rl_catch_sigwinch;
-
-/* Completion variables. */
-/* Pointer to the generator function for completion_matches ().
- NULL means to use rl_filename_completion_function (), the default
- filename completer. */
-extern rl_compentry_func_t *rl_completion_entry_function;
-
-/* Optional generator for menu completion. Default is
- rl_completion_entry_function (rl_filename_completion_function). */
- extern rl_compentry_func_t *rl_menu_completion_entry_function;
-
-/* If rl_ignore_some_completions_function is non-NULL it is the address
- of a function to call after all of the possible matches have been
- generated, but before the actual completion is done to the input line.
- The function is called with one argument; a NULL terminated array
- of (char *). If your function removes any of the elements, they
- must be free()'ed. */
-extern rl_compignore_func_t *rl_ignore_some_completions_function;
-
-/* Pointer to alternative function to create matches.
- Function is called with TEXT, START, and END.
- START and END are indices in RL_LINE_BUFFER saying what the boundaries
- of TEXT are.
- If this function exists and returns NULL then call the value of
- rl_completion_entry_function to try to match, otherwise use the
- array of strings returned. */
-extern rl_completion_func_t *rl_attempted_completion_function;
-
-/* The basic list of characters that signal a break between words for the
- completer routine. The initial contents of this variable is what
- breaks words in the shell, i.e. "n\"\\'`@$>". */
-extern const char *rl_basic_word_break_characters;
-
-/* The list of characters that signal a break between words for
- rl_complete_internal. The default list is the contents of
- rl_basic_word_break_characters. */
-extern /*const*/ char *rl_completer_word_break_characters;
-
-/* Hook function to allow an application to set the completion word
- break characters before readline breaks up the line. Allows
- position-dependent word break characters. */
-extern rl_cpvfunc_t *rl_completion_word_break_hook;
-
-/* List of characters which can be used to quote a substring of the line.
- Completion occurs on the entire substring, and within the substring
- rl_completer_word_break_characters are treated as any other character,
- unless they also appear within this list. */
-extern const char *rl_completer_quote_characters;
-
-/* List of quote characters which cause a word break. */
-extern const char *rl_basic_quote_characters;
-
-/* List of characters that need to be quoted in filenames by the completer. */
-extern const char *rl_filename_quote_characters;
-
-/* List of characters that are word break characters, but should be left
- in TEXT when it is passed to the completion function. The shell uses
- this to help determine what kind of completing to do. */
-extern const char *rl_special_prefixes;
-
-/* If non-zero, then this is the address of a function to call when
- completing on a directory name. The function is called with
- the address of a string (the current directory name) as an arg. It
- changes what is displayed when the possible completions are printed
- or inserted. The directory completion hook should perform
- any necessary dequoting. This function should return 1 if it modifies
- the directory name pointer passed as an argument. If the directory
- completion hook returns 0, it should not modify the directory name
- pointer passed as an argument. */
-extern rl_icppfunc_t *rl_directory_completion_hook;
-
-/* If non-zero, this is the address of a function to call when completing
- a directory name. This function takes the address of the directory name
- to be modified as an argument. Unlike rl_directory_completion_hook, it
- only modifies the directory name used in opendir(2), not what is displayed
- when the possible completions are printed or inserted. If set, it takes
- precedence over rl_directory_completion_hook. The directory rewrite
- hook should perform any necessary dequoting. This function has the same
- return value properties as the directory_completion_hook.
-
- I'm not happy with how this works yet, so it's undocumented. I'm trying
- it in bash to see how well it goes. */
-extern rl_icppfunc_t *rl_directory_rewrite_hook;
-
-/* If non-zero, this is the address of a function to call when reading
- directory entries from the filesystem for completion and comparing
- them to the partial word to be completed. The function should
- either return its first argument (if no conversion takes place) or
- newly-allocated memory. This can, for instance, convert filenames
- between character sets for comparison against what's typed at the
- keyboard. The returned value is what is added to the list of
- matches. The second argument is the length of the filename to be
- converted. */
-extern rl_dequote_func_t *rl_filename_rewrite_hook;
-
-/* Backwards compatibility with previous versions of readline. */
-#define rl_symbolic_link_hook rl_directory_completion_hook
-
-/* If non-zero, then this is the address of a function to call when
- completing a word would normally display the list of possible matches.
- This function is called instead of actually doing the display.
- It takes three arguments: (char **matches, int num_matches, int max_length)
- where MATCHES is the array of strings that matched, NUM_MATCHES is the
- number of strings in that array, and MAX_LENGTH is the length of the
- longest string in that array. */
-extern rl_compdisp_func_t *rl_completion_display_matches_hook;
-
-/* Non-zero means that the results of the matches are to be treated
- as filenames. This is ALWAYS zero on entry, and can only be changed
- within a completion entry finder function. */
-extern int rl_filename_completion_desired;
-
-/* Non-zero means that the results of the matches are to be quoted using
- double quotes (or an application-specific quoting mechanism) if the
- filename contains any characters in rl_word_break_chars. This is
- ALWAYS non-zero on entry, and can only be changed within a completion
- entry finder function. */
-extern int rl_filename_quoting_desired;
-
-/* Set to a function to quote a filename in an application-specific fashion.
- Called with the text to quote, the type of match found (single or multiple)
- and a pointer to the quoting character to be used, which the function can
- reset if desired. */
-extern rl_quote_func_t *rl_filename_quoting_function;
-
-/* Function to call to remove quoting characters from a filename. Called
- before completion is attempted, so the embedded quotes do not interfere
- with matching names in the file system. */
-extern rl_dequote_func_t *rl_filename_dequoting_function;
-
-/* Function to call to decide whether or not a word break character is
- quoted. If a character is quoted, it does not break words for the
- completer. */
-extern rl_linebuf_func_t *rl_char_is_quoted_p;
-
-/* Non-zero means to suppress normal filename completion after the
- user-specified completion function has been called. */
-extern int rl_attempted_completion_over;
-
-/* Set to a character describing the type of completion being attempted by
- rl_complete_internal; available for use by application completion
- functions. */
-extern int rl_completion_type;
-
-/* Set to the last key used to invoke one of the completion functions */
-extern int rl_completion_invoking_key;
-
-/* Up to this many items will be displayed in response to a
- possible-completions call. After that, we ask the user if she
- is sure she wants to see them all. The default value is 100. */
-extern int rl_completion_query_items;
-
-/* Character appended to completed words when at the end of the line. The
- default is a space. Nothing is added if this is '\0'. */
-extern int rl_completion_append_character;
-
-/* If set to non-zero by an application completion function,
- rl_completion_append_character will not be appended. */
-extern int rl_completion_suppress_append;
-
-/* Set to any quote character readline thinks it finds before any application
- completion function is called. */
-extern int rl_completion_quote_character;
-
-/* Set to a non-zero value if readline found quoting anywhere in the word to
- be completed; set before any application completion function is called. */
-extern int rl_completion_found_quote;
-
-/* If non-zero, the completion functions don't append any closing quote.
- This is set to 0 by rl_complete_internal and may be changed by an
- application-specific completion function. */
-extern int rl_completion_suppress_quote;
-
-/* If non-zero, readline will sort the completion matches. On by default. */
-extern int rl_sort_completion_matches;
-
-/* If non-zero, a slash will be appended to completed filenames that are
- symbolic links to directory names, subject to the value of the
- mark-directories variable (which is user-settable). This exists so
- that application completion functions can override the user's preference
- (set via the mark-symlinked-directories variable) if appropriate.
- It's set to the value of _rl_complete_mark_symlink_dirs in
- rl_complete_internal before any application-specific completion
- function is called, so without that function doing anything, the user's
- preferences are honored. */
-extern int rl_completion_mark_symlink_dirs;
-
-/* If non-zero, then disallow duplicates in the matches. */
-extern int rl_ignore_completion_duplicates;
-
-/* If this is non-zero, completion is (temporarily) inhibited, and the
- completion character will be inserted as any other. */
-extern int rl_inhibit_completion;
-
-/* Input error; can be returned by (*rl_getc_function) if readline is reading
- a top-level command (RL_ISSTATE (RL_STATE_READCMD)). */
-#define READERR (-2)
-
-/* Definitions available for use by readline clients. */
-#define RL_PROMPT_START_IGNORE '\001'
-#define RL_PROMPT_END_IGNORE '\002'
-
-/* Possible values for do_replace argument to rl_filename_quoting_function,
- called by rl_complete_internal. */
-#define NO_MATCH 0
-#define SINGLE_MATCH 1
-#define MULT_MATCH 2
-
-/* Possible state values for rl_readline_state */
-#define RL_STATE_NONE 0x000000 /* no state; before first call */
-
-#define RL_STATE_INITIALIZING 0x0000001 /* initializing */
-#define RL_STATE_INITIALIZED 0x0000002 /* initialization done */
-#define RL_STATE_TERMPREPPED 0x0000004 /* terminal is prepped */
-#define RL_STATE_READCMD 0x0000008 /* reading a command key */
-#define RL_STATE_METANEXT 0x0000010 /* reading input after ESC */
-#define RL_STATE_DISPATCHING 0x0000020 /* dispatching to a command */
-#define RL_STATE_MOREINPUT 0x0000040 /* reading more input in a command function */
-#define RL_STATE_ISEARCH 0x0000080 /* doing incremental search */
-#define RL_STATE_NSEARCH 0x0000100 /* doing non-inc search */
-#define RL_STATE_SEARCH 0x0000200 /* doing a history search */
-#define RL_STATE_NUMERICARG 0x0000400 /* reading numeric argument */
-#define RL_STATE_MACROINPUT 0x0000800 /* getting input from a macro */
-#define RL_STATE_MACRODEF 0x0001000 /* defining keyboard macro */
-#define RL_STATE_OVERWRITE 0x0002000 /* overwrite mode */
-#define RL_STATE_COMPLETING 0x0004000 /* doing completion */
-#define RL_STATE_SIGHANDLER 0x0008000 /* in readline sighandler */
-#define RL_STATE_UNDOING 0x0010000 /* doing an undo */
-#define RL_STATE_INPUTPENDING 0x0020000 /* rl_execute_next called */
-#define RL_STATE_TTYCSAVED 0x0040000 /* tty special chars saved */
-#define RL_STATE_CALLBACK 0x0080000 /* using the callback interface */
-#define RL_STATE_VIMOTION 0x0100000 /* reading vi motion arg */
-#define RL_STATE_MULTIKEY 0x0200000 /* reading multiple-key command */
-#define RL_STATE_VICMDONCE 0x0400000 /* entered vi command mode at least once */
-#define RL_STATE_REDISPLAYING 0x0800000 /* updating terminal display */
-
-#define RL_STATE_DONE 0x1000000 /* done; accepted line */
-
-#define RL_SETSTATE(x) (rl_readline_state |= (x))
-#define RL_UNSETSTATE(x) (rl_readline_state &= ~(x))
-#define RL_ISSTATE(x) (rl_readline_state & (x))
-
-struct readline_state {
- /* line state */
- int point;
- int end;
- int mark;
- char *buffer;
- int buflen;
- UNDO_LIST *ul;
- char *prompt;
-
- /* global state */
- int rlstate;
- int done;
- Keymap kmap;
-
- /* input state */
- rl_command_func_t *lastfunc;
- int insmode;
- int edmode;
- int kseqlen;
- FILE *inf;
- FILE *outf;
- int pendingin;
- char *macro;
-
- /* signal state */
- int catchsigs;
- int catchsigwinch;
-
- /* search state */
-
- /* completion state */
-
- /* options state */
-
- /* reserved for future expansion, so the struct size doesn't change */
- char reserved[64];
-};
-
-extern int rl_save_state PARAMS((struct readline_state *));
-extern int rl_restore_state PARAMS((struct readline_state *));
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _READLINE_H_ */
+++ /dev/null
-/* rlprivate.h -- functions and variables global to the readline library,
- but not intended for use by applications. */
-
-/* Copyright (C) 1999-2010 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined (_RL_PRIVATE_H_)
-#define _RL_PRIVATE_H_
-
-#include "rlconf.h" /* for VISIBLE_STATS */
-#include "rlstdc.h"
-#include "posixjmp.h" /* defines procenv_t */
-
-/*************************************************************************
- * *
- * Convenience definitions *
- * *
- *************************************************************************/
-
-#define EMACS_MODE() (rl_editing_mode == emacs_mode)
-#define VI_COMMAND_MODE() (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap)
-#define VI_INSERT_MODE() (rl_editing_mode == vi_mode && _rl_keymap == vi_insertion_keymap)
-
-#define RL_CHECK_SIGNALS() \
- do { \
- if (_rl_caught_signal) _rl_signal_handler (_rl_caught_signal); \
- } while (0)
-
-/*************************************************************************
- * *
- * Global structs undocumented in texinfo manual and not in readline.h *
- * *
- *************************************************************************/
-/* search types */
-#define RL_SEARCH_ISEARCH 0x01 /* incremental search */
-#define RL_SEARCH_NSEARCH 0x02 /* non-incremental search */
-#define RL_SEARCH_CSEARCH 0x04 /* intra-line char search */
-
-/* search flags */
-#define SF_REVERSE 0x01
-#define SF_FOUND 0x02
-#define SF_FAILED 0x04
-#define SF_CHGKMAP 0x08
-
-typedef struct __rl_search_context
-{
- int type;
- int sflags;
-
- char *search_string;
- int search_string_index;
- int search_string_size;
-
- char **lines;
- char *allocated_line;
- int hlen;
- int hindex;
-
- int save_point;
- int save_mark;
- int save_line;
- int last_found_line;
- char *prev_line_found;
-
- UNDO_LIST *save_undo_list;
-
- Keymap keymap; /* used when dispatching commands in search string */
- Keymap okeymap; /* original keymap */
-
- int history_pos;
- int direction;
-
- int lastc;
-#if defined (HANDLE_MULTIBYTE)
- char mb[MB_LEN_MAX];
-#endif
-
- char *sline;
- int sline_len;
- int sline_index;
-
- char *search_terminators;
-} _rl_search_cxt;
-
-/* Callback data for reading numeric arguments */
-#define NUM_SAWMINUS 0x01
-#define NUM_SAWDIGITS 0x02
-#define NUM_READONE 0x04
-
-typedef int _rl_arg_cxt;
-
-/* A context for reading key sequences longer than a single character when
- using the callback interface. */
-#define KSEQ_DISPATCHED 0x01
-#define KSEQ_SUBSEQ 0x02
-#define KSEQ_RECURSIVE 0x04
-
-typedef struct __rl_keyseq_context
-{
- int flags;
- int subseq_arg;
- int subseq_retval; /* XXX */
- Keymap dmap;
-
- Keymap oldmap;
- int okey;
- struct __rl_keyseq_context *ocxt;
- int childval;
-} _rl_keyseq_cxt;
-
-/* vi-mode commands that use result of motion command to define boundaries */
-#define VIM_DELETE 0x01
-#define VIM_CHANGE 0x02
-#define VIM_YANK 0x04
-
-/* various states for vi-mode commands that use motion commands. reflects
- RL_READLINE_STATE */
-#define VMSTATE_READ 0x01
-#define VMSTATE_NUMARG 0x02
-
-typedef struct __rl_vimotion_context
-{
- int op;
- int state;
- int flags; /* reserved */
- _rl_arg_cxt ncxt;
- int numeric_arg;
- int start, end; /* rl_point, rl_end */
- int key, motion; /* initial key, motion command */
-} _rl_vimotion_cxt;
-
-/* fill in more as needed */
-/* `Generic' callback data and functions */
-typedef struct __rl_callback_generic_arg
-{
- int count;
- int i1, i2;
- /* add here as needed */
-} _rl_callback_generic_arg;
-
-typedef int _rl_callback_func_t PARAMS((_rl_callback_generic_arg *));
-
-/*************************************************************************
- * *
- * Global functions undocumented in texinfo manual and not in readline.h *
- * *
- *************************************************************************/
-
-/*************************************************************************
- * *
- * Global variables undocumented in texinfo manual and not in readline.h *
- * *
- *************************************************************************/
-
-/* complete.c */
-extern int rl_complete_with_tilde_expansion;
-#if defined (VISIBLE_STATS)
-extern int rl_visible_stats;
-#endif /* VISIBLE_STATS */
-
-/* readline.c */
-extern int rl_line_buffer_len;
-extern int rl_arg_sign;
-extern int rl_visible_prompt_length;
-extern int rl_key_sequence_length;
-extern int rl_byte_oriented;
-
-/* display.c */
-extern int rl_display_fixed;
-
-/* parens.c */
-extern int rl_blink_matching_paren;
-
-/*************************************************************************
- * *
- * Global functions and variables unsed and undocumented *
- * *
- *************************************************************************/
-
-/* kill.c */
-extern int rl_set_retained_kills PARAMS((int));
-
-/* terminal.c */
-extern void _rl_set_screen_size PARAMS((int, int));
-
-/* undo.c */
-extern int _rl_fix_last_undo_of_type PARAMS((int, int, int));
-
-/* util.c */
-extern char *_rl_savestring PARAMS((const char *));
-
-/*************************************************************************
- * *
- * Functions and variables private to the readline library *
- * *
- *************************************************************************/
-
-/* NOTE: Functions and variables prefixed with `_rl_' are
- pseudo-global: they are global so they can be shared
- between files in the readline library, but are not intended
- to be visible to readline callers. */
-
-/*************************************************************************
- * Undocumented private functions *
- *************************************************************************/
-
-#if defined(READLINE_CALLBACKS)
-
-/* readline.c */
-extern void readline_internal_setup PARAMS((void));
-extern char *readline_internal_teardown PARAMS((int));
-extern int readline_internal_char PARAMS((void));
-
-extern _rl_keyseq_cxt *_rl_keyseq_cxt_alloc PARAMS((void));
-extern void _rl_keyseq_cxt_dispose PARAMS((_rl_keyseq_cxt *));
-extern void _rl_keyseq_chain_dispose PARAMS((void));
-
-extern int _rl_dispatch_callback PARAMS((_rl_keyseq_cxt *));
-
-/* callback.c */
-extern _rl_callback_generic_arg *_rl_callback_data_alloc PARAMS((int));
-extern void _rl_callback_data_dispose PARAMS((_rl_callback_generic_arg *));
-
-#endif /* READLINE_CALLBACKS */
-
-/* bind.c */
-
-/* complete.c */
-extern void _rl_reset_completion_state PARAMS((void));
-extern char _rl_find_completion_word PARAMS((int *, int *));
-extern void _rl_free_match_list PARAMS((char **));
-
-/* display.c */
-extern char *_rl_strip_prompt PARAMS((char *));
-extern void _rl_move_cursor_relative PARAMS((int, const char *));
-extern void _rl_move_vert PARAMS((int));
-extern void _rl_save_prompt PARAMS((void));
-extern void _rl_restore_prompt PARAMS((void));
-extern char *_rl_make_prompt_for_search PARAMS((int));
-extern void _rl_erase_at_end_of_line PARAMS((int));
-extern void _rl_clear_to_eol PARAMS((int));
-extern void _rl_clear_screen PARAMS((void));
-extern void _rl_update_final PARAMS((void));
-extern void _rl_redisplay_after_sigwinch PARAMS((void));
-extern void _rl_clean_up_for_exit PARAMS((void));
-extern void _rl_erase_entire_line PARAMS((void));
-extern int _rl_current_display_line PARAMS((void));
-
-/* input.c */
-extern int _rl_any_typein PARAMS((void));
-extern int _rl_input_available PARAMS((void));
-extern int _rl_input_queued PARAMS((int));
-extern void _rl_insert_typein PARAMS((int));
-extern int _rl_unget_char PARAMS((int));
-extern int _rl_pushed_input_available PARAMS((void));
-
-/* isearch.c */
-extern _rl_search_cxt *_rl_scxt_alloc PARAMS((int, int));
-extern void _rl_scxt_dispose PARAMS((_rl_search_cxt *, int));
-
-extern int _rl_isearch_dispatch PARAMS((_rl_search_cxt *, int));
-extern int _rl_isearch_callback PARAMS((_rl_search_cxt *));
-
-extern int _rl_search_getchar PARAMS((_rl_search_cxt *));
-
-/* macro.c */
-extern void _rl_with_macro_input PARAMS((char *));
-extern int _rl_next_macro_key PARAMS((void));
-extern void _rl_push_executing_macro PARAMS((void));
-extern void _rl_pop_executing_macro PARAMS((void));
-extern void _rl_add_macro_char PARAMS((int));
-extern void _rl_kill_kbd_macro PARAMS((void));
-
-/* misc.c */
-extern int _rl_arg_overflow PARAMS((void));
-extern void _rl_arg_init PARAMS((void));
-extern int _rl_arg_getchar PARAMS((void));
-extern int _rl_arg_callback PARAMS((_rl_arg_cxt));
-extern void _rl_reset_argument PARAMS((void));
-
-extern void _rl_start_using_history PARAMS((void));
-extern int _rl_free_saved_history_line PARAMS((void));
-extern void _rl_set_insert_mode PARAMS((int, int));
-
-extern void _rl_revert_all_lines PARAMS((void));
-
-/* nls.c */
-extern int _rl_init_eightbit PARAMS((void));
-
-/* parens.c */
-extern void _rl_enable_paren_matching PARAMS((int));
-
-/* readline.c */
-extern void _rl_init_line_state PARAMS((void));
-extern void _rl_set_the_line PARAMS((void));
-extern int _rl_dispatch PARAMS((int, Keymap));
-extern int _rl_dispatch_subseq PARAMS((int, Keymap, int));
-extern void _rl_internal_char_cleanup PARAMS((void));
-
-/* rltty.c */
-extern int _rl_disable_tty_signals PARAMS((void));
-extern int _rl_restore_tty_signals PARAMS((void));
-
-/* search.c */
-extern int _rl_nsearch_callback PARAMS((_rl_search_cxt *));
-
-/* signals.c */
-extern void _rl_signal_handler PARAMS((int));
-
-extern void _rl_block_sigint PARAMS((void));
-extern void _rl_release_sigint PARAMS((void));
-extern void _rl_block_sigwinch PARAMS((void));
-extern void _rl_release_sigwinch PARAMS((void));
-
-/* terminal.c */
-extern void _rl_get_screen_size PARAMS((int, int));
-extern int _rl_init_terminal_io PARAMS((const char *));
-#ifdef _MINIX
-extern void _rl_output_character_function PARAMS((int));
-#else
-extern int _rl_output_character_function PARAMS((int));
-#endif
-extern void _rl_output_some_chars PARAMS((const char *, int));
-extern int _rl_backspace PARAMS((int));
-extern void _rl_enable_meta_key PARAMS((void));
-extern void _rl_control_keypad PARAMS((int));
-extern void _rl_set_cursor PARAMS((int, int));
-
-/* text.c */
-extern void _rl_fix_point PARAMS((int));
-extern int _rl_replace_text PARAMS((const char *, int, int));
-extern int _rl_forward_char_internal PARAMS((int));
-extern int _rl_insert_char PARAMS((int, int));
-extern int _rl_overwrite_char PARAMS((int, int));
-extern int _rl_overwrite_rubout PARAMS((int, int));
-extern int _rl_rubout_char PARAMS((int, int));
-#if defined (HANDLE_MULTIBYTE)
-extern int _rl_char_search_internal PARAMS((int, int, char *, int));
-#else
-extern int _rl_char_search_internal PARAMS((int, int, int));
-#endif
-extern int _rl_set_mark_at_pos PARAMS((int));
-
-/* undo.c */
-extern UNDO_LIST *_rl_copy_undo_entry PARAMS((UNDO_LIST *));
-extern UNDO_LIST *_rl_copy_undo_list PARAMS((UNDO_LIST *));
-
-/* util.c */
-#if defined (USE_VARARGS) && defined (PREFER_STDARG)
-extern void _rl_ttymsg (const char *, ...) __attribute__((__format__ (printf, 1, 2)));
-extern void _rl_errmsg (const char *, ...) __attribute__((__format__ (printf, 1, 2)));
-extern void _rl_trace (const char *, ...) __attribute__((__format__ (printf, 1, 2)));
-#else
-extern void _rl_ttymsg ();
-extern void _rl_errmsg ();
-extern void _rl_trace ();
-#endif
-
-extern int _rl_tropen PARAMS((void));
-
-extern int _rl_abort_internal PARAMS((void));
-extern int _rl_null_function PARAMS((int, int));
-extern char *_rl_strindex PARAMS((const char *, const char *));
-extern int _rl_qsort_string_compare PARAMS((char **, char **));
-extern int (_rl_uppercase_p) PARAMS((int));
-extern int (_rl_lowercase_p) PARAMS((int));
-extern int (_rl_pure_alphabetic) PARAMS((int));
-extern int (_rl_digit_p) PARAMS((int));
-extern int (_rl_to_lower) PARAMS((int));
-extern int (_rl_to_upper) PARAMS((int));
-extern int (_rl_digit_value) PARAMS((int));
-
-/* vi_mode.c */
-extern void _rl_vi_initialize_line PARAMS((void));
-extern void _rl_vi_reset_last PARAMS((void));
-extern void _rl_vi_set_last PARAMS((int, int, int));
-extern int _rl_vi_textmod_command PARAMS((int));
-extern void _rl_vi_done_inserting PARAMS((void));
-extern int _rl_vi_domove_callback PARAMS((_rl_vimotion_cxt *));
-
-/*************************************************************************
- * Undocumented private variables *
- *************************************************************************/
-
-/* bind.c */
-extern const char * const _rl_possible_control_prefixes[];
-extern const char * const _rl_possible_meta_prefixes[];
-
-/* callback.c */
-extern _rl_callback_func_t *_rl_callback_func;
-extern _rl_callback_generic_arg *_rl_callback_data;
-
-/* complete.c */
-extern int _rl_complete_show_all;
-extern int _rl_complete_show_unmodified;
-extern int _rl_complete_mark_directories;
-extern int _rl_complete_mark_symlink_dirs;
-extern int _rl_completion_prefix_display_length;
-extern int _rl_completion_columns;
-extern int _rl_print_completions_horizontally;
-extern int _rl_completion_case_fold;
-extern int _rl_completion_case_map;
-extern int _rl_match_hidden_files;
-extern int _rl_page_completions;
-extern int _rl_skip_completed_text;
-extern int _rl_menu_complete_prefix_first;
-
-/* display.c */
-extern int _rl_vis_botlin;
-extern int _rl_last_c_pos;
-extern int _rl_suppress_redisplay;
-extern int _rl_want_redisplay;
-
-/* isearch.c */
-extern char *_rl_isearch_terminators;
-
-extern _rl_search_cxt *_rl_iscxt;
-
-/* macro.c */
-extern char *_rl_executing_macro;
-
-/* misc.c */
-extern int _rl_history_preserve_point;
-extern int _rl_history_saved_point;
-
-extern _rl_arg_cxt _rl_argcxt;
-
-/* readline.c */
-extern int _rl_echoing_p;
-extern int _rl_horizontal_scroll_mode;
-extern int _rl_mark_modified_lines;
-extern int _rl_bell_preference;
-extern int _rl_meta_flag;
-extern int _rl_convert_meta_chars_to_ascii;
-extern int _rl_output_meta_chars;
-extern int _rl_bind_stty_chars;
-extern int _rl_revert_all_at_newline;
-extern int _rl_echo_control_chars;
-extern char *_rl_comment_begin;
-extern unsigned char _rl_parsing_conditionalized_out;
-extern Keymap _rl_keymap;
-extern FILE *_rl_in_stream;
-extern FILE *_rl_out_stream;
-extern int _rl_last_command_was_kill;
-extern int _rl_eof_char;
-extern procenv_t _rl_top_level;
-extern _rl_keyseq_cxt *_rl_kscxt;
-
-/* search.c */
-extern _rl_search_cxt *_rl_nscxt;
-
-/* signals.c */
-extern int _rl_interrupt_immediately;
-extern int volatile _rl_caught_signal;
-
-extern int _rl_echoctl;
-
-extern int _rl_intr_char;
-extern int _rl_quit_char;
-extern int _rl_susp_char;
-
-/* terminal.c */
-extern int _rl_enable_keypad;
-extern int _rl_enable_meta;
-extern char *_rl_term_clreol;
-extern char *_rl_term_clrpag;
-extern char *_rl_term_im;
-extern char *_rl_term_ic;
-extern char *_rl_term_ei;
-extern char *_rl_term_DC;
-extern char *_rl_term_up;
-extern char *_rl_term_dc;
-extern char *_rl_term_cr;
-extern char *_rl_term_IC;
-extern char *_rl_term_forward_char;
-extern int _rl_screenheight;
-extern int _rl_screenwidth;
-extern int _rl_screenchars;
-extern int _rl_terminal_can_insert;
-extern int _rl_term_autowrap;
-
-/* undo.c */
-extern int _rl_doing_an_undo;
-extern int _rl_undo_group_level;
-
-/* vi_mode.c */
-extern int _rl_vi_last_command;
-extern _rl_vimotion_cxt *_rl_vimvcxt;
-
-#endif /* _RL_PRIVATE_H_ */
+++ /dev/null
-/* stdc.h -- macros to make source compile on both ANSI C and K&R C compilers. */
-
-/* Copyright (C) 1993-2009 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined (_RL_STDC_H_)
-#define _RL_STDC_H_
-
-/* Adapted from BSD /usr/include/sys/cdefs.h. */
-
-/* A function can be defined using prototypes and compile on both ANSI C
- and traditional C compilers with something like this:
- extern char *func PARAMS((char *, char *, int)); */
-
-#if !defined (PARAMS)
-# if defined (__STDC__) || defined (__GNUC__) || defined (__cplusplus)
-# define PARAMS(protos) protos
-# else
-# define PARAMS(protos) ()
-# endif
-#endif
-
-#ifndef __attribute__
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8)
-# define __attribute__(x)
-# endif
-#endif
-
-#endif /* !_RL_STDC_H_ */
+++ /dev/null
-/* rltty.c -- functions to prepare and restore the terminal for readline's
- use. */
-
-/* Copyright (C) 1992-2005 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <sys/types.h>
-#include <signal.h>
-#include <errno.h>
-#include <stdio.h>
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-
-#include "rldefs.h"
-
-#if defined (GWINSZ_IN_SYS_IOCTL)
-# include <sys/ioctl.h>
-#endif /* GWINSZ_IN_SYS_IOCTL */
-
-#include "rltty.h"
-#include "readline.h"
-#include "rlprivate.h"
-
-#if !defined (errno)
-extern int errno;
-#endif /* !errno */
-
-rl_vintfunc_t *rl_prep_term_function = rl_prep_terminal;
-rl_voidfunc_t *rl_deprep_term_function = rl_deprep_terminal;
-
-static void set_winsize PARAMS((int));
-
-/* **************************************************************** */
-/* */
-/* Saving and Restoring the TTY */
-/* */
-/* **************************************************************** */
-
-/* Non-zero means that the terminal is in a prepped state. */
-static int terminal_prepped;
-
-static _RL_TTY_CHARS _rl_tty_chars, _rl_last_tty_chars;
-
-/* If non-zero, means that this process has called tcflow(fd, TCOOFF)
- and output is suspended. */
-#if defined (__ksr1__)
-static int ksrflow;
-#endif
-
-/* Dummy call to force a backgrounded readline to stop before it tries
- to get the tty settings. */
-static void
-set_winsize (tty)
- int tty;
-{
-#if defined (TIOCGWINSZ)
- struct winsize w;
-
- if (ioctl (tty, TIOCGWINSZ, &w) == 0)
- (void) ioctl (tty, TIOCSWINSZ, &w);
-#endif /* TIOCGWINSZ */
-}
-
-#if defined (NO_TTY_DRIVER)
-/* Nothing */
-#elif defined (NEW_TTY_DRIVER)
-
-/* Values for the `flags' field of a struct bsdtty. This tells which
- elements of the struct bsdtty have been fetched from the system and
- are valid. */
-#define SGTTY_SET 0x01
-#define LFLAG_SET 0x02
-#define TCHARS_SET 0x04
-#define LTCHARS_SET 0x08
-
-struct bsdtty {
- struct sgttyb sgttyb; /* Basic BSD tty driver information. */
- int lflag; /* Local mode flags, like LPASS8. */
-#if defined (TIOCGETC)
- struct tchars tchars; /* Terminal special characters, including ^S and ^Q. */
-#endif
-#if defined (TIOCGLTC)
- struct ltchars ltchars; /* 4.2 BSD editing characters */
-#endif
- int flags; /* Bitmap saying which parts of the struct are valid. */
-};
-
-#define TIOTYPE struct bsdtty
-
-static TIOTYPE otio;
-
-static void save_tty_chars PARAMS((TIOTYPE *));
-static int _get_tty_settings PARAMS((int, TIOTYPE *));
-static int get_tty_settings PARAMS((int, TIOTYPE *));
-static int _set_tty_settings PARAMS((int, TIOTYPE *));
-static int set_tty_settings PARAMS((int, TIOTYPE *));
-
-static void prepare_terminal_settings PARAMS((int, TIOTYPE, TIOTYPE *));
-
-static void set_special_char PARAMS((Keymap, TIOTYPE *, int, rl_command_func_t));
-
-static void
-save_tty_chars (tiop)
- TIOTYPE *tiop;
-{
- _rl_last_tty_chars = _rl_tty_chars;
-
- if (tiop->flags & SGTTY_SET)
- {
- _rl_tty_chars.t_erase = tiop->sgttyb.sg_erase;
- _rl_tty_chars.t_kill = tiop->sgttyb.sg_kill;
- }
-
- if (tiop->flags & TCHARS_SET)
- {
- _rl_intr_char = _rl_tty_chars.t_intr = tiop->tchars.t_intrc;
- _rl_quit_char = _rl_tty_chars.t_quit = tiop->tchars.t_quitc;
-
- _rl_tty_chars.t_start = tiop->tchars.t_startc;
- _rl_tty_chars.t_stop = tiop->tchars.t_stopc;
- _rl_tty_chars.t_eof = tiop->tchars.t_eofc;
- _rl_tty_chars.t_eol = '\n';
- _rl_tty_chars.t_eol2 = tiop->tchars.t_brkc;
- }
-
- if (tiop->flags & LTCHARS_SET)
- {
- _rl_susp_char = _rl_tty_chars.t_susp = tiop->ltchars.t_suspc;
-
- _rl_tty_chars.t_dsusp = tiop->ltchars.t_dsuspc;
- _rl_tty_chars.t_reprint = tiop->ltchars.t_rprntc;
- _rl_tty_chars.t_flush = tiop->ltchars.t_flushc;
- _rl_tty_chars.t_werase = tiop->ltchars.t_werasc;
- _rl_tty_chars.t_lnext = tiop->ltchars.t_lnextc;
- }
-
- _rl_tty_chars.t_status = -1;
-}
-
-static int
-get_tty_settings (tty, tiop)
- int tty;
- TIOTYPE *tiop;
-{
- set_winsize (tty);
-
- tiop->flags = tiop->lflag = 0;
-
- errno = 0;
- if (ioctl (tty, TIOCGETP, &(tiop->sgttyb)) < 0)
- return -1;
- tiop->flags |= SGTTY_SET;
-
-#if defined (TIOCLGET)
- if (ioctl (tty, TIOCLGET, &(tiop->lflag)) == 0)
- tiop->flags |= LFLAG_SET;
-#endif
-
-#if defined (TIOCGETC)
- if (ioctl (tty, TIOCGETC, &(tiop->tchars)) == 0)
- tiop->flags |= TCHARS_SET;
-#endif
-
-#if defined (TIOCGLTC)
- if (ioctl (tty, TIOCGLTC, &(tiop->ltchars)) == 0)
- tiop->flags |= LTCHARS_SET;
-#endif
-
- return 0;
-}
-
-static int
-set_tty_settings (tty, tiop)
- int tty;
- TIOTYPE *tiop;
-{
- if (tiop->flags & SGTTY_SET)
- {
- ioctl (tty, TIOCSETN, &(tiop->sgttyb));
- tiop->flags &= ~SGTTY_SET;
- }
- _rl_echoing_p = 1;
-
-#if defined (TIOCLSET)
- if (tiop->flags & LFLAG_SET)
- {
- ioctl (tty, TIOCLSET, &(tiop->lflag));
- tiop->flags &= ~LFLAG_SET;
- }
-#endif
-
-#if defined (TIOCSETC)
- if (tiop->flags & TCHARS_SET)
- {
- ioctl (tty, TIOCSETC, &(tiop->tchars));
- tiop->flags &= ~TCHARS_SET;
- }
-#endif
-
-#if defined (TIOCSLTC)
- if (tiop->flags & LTCHARS_SET)
- {
- ioctl (tty, TIOCSLTC, &(tiop->ltchars));
- tiop->flags &= ~LTCHARS_SET;
- }
-#endif
-
- return 0;
-}
-
-static void
-prepare_terminal_settings (meta_flag, oldtio, tiop)
- int meta_flag;
- TIOTYPE oldtio, *tiop;
-{
- _rl_echoing_p = (oldtio.sgttyb.sg_flags & ECHO);
- _rl_echoctl = (oldtio.sgttyb.sg_flags & ECHOCTL);
-
- /* Copy the original settings to the structure we're going to use for
- our settings. */
- tiop->sgttyb = oldtio.sgttyb;
- tiop->lflag = oldtio.lflag;
-#if defined (TIOCGETC)
- tiop->tchars = oldtio.tchars;
-#endif
-#if defined (TIOCGLTC)
- tiop->ltchars = oldtio.ltchars;
-#endif
- tiop->flags = oldtio.flags;
-
- /* First, the basic settings to put us into character-at-a-time, no-echo
- input mode. */
- tiop->sgttyb.sg_flags &= ~(ECHO | CRMOD);
- tiop->sgttyb.sg_flags |= CBREAK;
-
- /* If this terminal doesn't care how the 8th bit is used, then we can
- use it for the meta-key. If only one of even or odd parity is
- specified, then the terminal is using parity, and we cannot. */
-#if !defined (ANYP)
-# define ANYP (EVENP | ODDP)
-#endif
- if (((oldtio.sgttyb.sg_flags & ANYP) == ANYP) ||
- ((oldtio.sgttyb.sg_flags & ANYP) == 0))
- {
- tiop->sgttyb.sg_flags |= ANYP;
-
- /* Hack on local mode flags if we can. */
-#if defined (TIOCLGET)
-# if defined (LPASS8)
- tiop->lflag |= LPASS8;
-# endif /* LPASS8 */
-#endif /* TIOCLGET */
- }
-
-#if defined (TIOCGETC)
-# if defined (USE_XON_XOFF)
- /* Get rid of terminal output start and stop characters. */
- tiop->tchars.t_stopc = -1; /* C-s */
- tiop->tchars.t_startc = -1; /* C-q */
-
- /* If there is an XON character, bind it to restart the output. */
- if (oldtio.tchars.t_startc != -1)
- rl_bind_key (oldtio.tchars.t_startc, rl_restart_output);
-# endif /* USE_XON_XOFF */
-
- /* If there is an EOF char, bind _rl_eof_char to it. */
- if (oldtio.tchars.t_eofc != -1)
- _rl_eof_char = oldtio.tchars.t_eofc;
-
-# if defined (NO_KILL_INTR)
- /* Get rid of terminal-generated SIGQUIT and SIGINT. */
- tiop->tchars.t_quitc = -1; /* C-\ */
- tiop->tchars.t_intrc = -1; /* C-c */
-# endif /* NO_KILL_INTR */
-#endif /* TIOCGETC */
-
-#if defined (TIOCGLTC)
- /* Make the interrupt keys go away. Just enough to make people happy. */
- tiop->ltchars.t_dsuspc = -1; /* C-y */
- tiop->ltchars.t_lnextc = -1; /* C-v */
-#endif /* TIOCGLTC */
-}
-
-#else /* !defined (NEW_TTY_DRIVER) */
-
-#if !defined (VMIN)
-# define VMIN VEOF
-#endif
-
-#if !defined (VTIME)
-# define VTIME VEOL
-#endif
-
-#if defined (TERMIOS_TTY_DRIVER)
-# define TIOTYPE struct termios
-# define DRAIN_OUTPUT(fd) tcdrain (fd)
-# define GETATTR(tty, tiop) (tcgetattr (tty, tiop))
-# ifdef M_UNIX
-# define SETATTR(tty, tiop) (tcsetattr (tty, TCSANOW, tiop))
-# else
-# define SETATTR(tty, tiop) (tcsetattr (tty, TCSADRAIN, tiop))
-# endif /* !M_UNIX */
-#else
-# define TIOTYPE struct termio
-# define DRAIN_OUTPUT(fd)
-# define GETATTR(tty, tiop) (ioctl (tty, TCGETA, tiop))
-# define SETATTR(tty, tiop) (ioctl (tty, TCSETAW, tiop))
-#endif /* !TERMIOS_TTY_DRIVER */
-
-static TIOTYPE otio;
-
-static void save_tty_chars PARAMS((TIOTYPE *));
-static int _get_tty_settings PARAMS((int, TIOTYPE *));
-static int get_tty_settings PARAMS((int, TIOTYPE *));
-static int _set_tty_settings PARAMS((int, TIOTYPE *));
-static int set_tty_settings PARAMS((int, TIOTYPE *));
-
-static void prepare_terminal_settings PARAMS((int, TIOTYPE, TIOTYPE *));
-
-static void set_special_char PARAMS((Keymap, TIOTYPE *, int, rl_command_func_t));
-static void _rl_bind_tty_special_chars PARAMS((Keymap, TIOTYPE));
-
-#if defined (FLUSHO)
-# define OUTPUT_BEING_FLUSHED(tp) (tp->c_lflag & FLUSHO)
-#else
-# define OUTPUT_BEING_FLUSHED(tp) 0
-#endif
-
-static void
-save_tty_chars (tiop)
- TIOTYPE *tiop;
-{
- _rl_last_tty_chars = _rl_tty_chars;
-
- _rl_tty_chars.t_eof = tiop->c_cc[VEOF];
- _rl_tty_chars.t_eol = tiop->c_cc[VEOL];
-#ifdef VEOL2
- _rl_tty_chars.t_eol2 = tiop->c_cc[VEOL2];
-#endif
- _rl_tty_chars.t_erase = tiop->c_cc[VERASE];
-#ifdef VWERASE
- _rl_tty_chars.t_werase = tiop->c_cc[VWERASE];
-#endif
- _rl_tty_chars.t_kill = tiop->c_cc[VKILL];
-#ifdef VREPRINT
- _rl_tty_chars.t_reprint = tiop->c_cc[VREPRINT];
-#endif
- _rl_intr_char = _rl_tty_chars.t_intr = tiop->c_cc[VINTR];
- _rl_quit_char = _rl_tty_chars.t_quit = tiop->c_cc[VQUIT];
-#ifdef VSUSP
- _rl_susp_char = _rl_tty_chars.t_susp = tiop->c_cc[VSUSP];
-#endif
-#ifdef VDSUSP
- _rl_tty_chars.t_dsusp = tiop->c_cc[VDSUSP];
-#endif
-#ifdef VSTART
- _rl_tty_chars.t_start = tiop->c_cc[VSTART];
-#endif
-#ifdef VSTOP
- _rl_tty_chars.t_stop = tiop->c_cc[VSTOP];
-#endif
-#ifdef VLNEXT
- _rl_tty_chars.t_lnext = tiop->c_cc[VLNEXT];
-#endif
-#ifdef VDISCARD
- _rl_tty_chars.t_flush = tiop->c_cc[VDISCARD];
-#endif
-#ifdef VSTATUS
- _rl_tty_chars.t_status = tiop->c_cc[VSTATUS];
-#endif
-}
-
-#if defined (_AIX) || defined (_AIX41)
-/* Currently this is only used on AIX */
-static void
-rltty_warning (msg)
- char *msg;
-{
- _rl_errmsg ("warning: %s", msg);
-}
-#endif
-
-#if defined (_AIX)
-void
-setopost(tp)
-TIOTYPE *tp;
-{
- if ((tp->c_oflag & OPOST) == 0)
- {
- _rl_errmsg ("warning: turning on OPOST for terminal\r");
- tp->c_oflag |= OPOST|ONLCR;
- }
-}
-#endif
-
-static int
-_get_tty_settings (tty, tiop)
- int tty;
- TIOTYPE *tiop;
-{
- int ioctl_ret;
-
- while (1)
- {
- ioctl_ret = GETATTR (tty, tiop);
- if (ioctl_ret < 0)
- {
- if (errno != EINTR)
- return -1;
- else
- continue;
- }
- if (OUTPUT_BEING_FLUSHED (tiop))
- {
-#if defined (FLUSHO)
- _rl_errmsg ("warning: turning off output flushing");
- tiop->c_lflag &= ~FLUSHO;
- break;
-#else
- continue;
-#endif
- }
- break;
- }
-
- return 0;
-}
-
-static int
-get_tty_settings (tty, tiop)
- int tty;
- TIOTYPE *tiop;
-{
- set_winsize (tty);
-
- errno = 0;
- if (_get_tty_settings (tty, tiop) < 0)
- return -1;
-
-#if defined (_AIX)
- setopost(tiop);
-#endif
-
- return 0;
-}
-
-static int
-_set_tty_settings (tty, tiop)
- int tty;
- TIOTYPE *tiop;
-{
- while (SETATTR (tty, tiop) < 0)
- {
- if (errno != EINTR)
- return -1;
- errno = 0;
- }
- return 0;
-}
-
-static int
-set_tty_settings (tty, tiop)
- int tty;
- TIOTYPE *tiop;
-{
- if (_set_tty_settings (tty, tiop) < 0)
- return -1;
-
-#if 0
-
-#if defined (TERMIOS_TTY_DRIVER)
-# if defined (__ksr1__)
- if (ksrflow)
- {
- ksrflow = 0;
- tcflow (tty, TCOON);
- }
-# else /* !ksr1 */
- tcflow (tty, TCOON); /* Simulate a ^Q. */
-# endif /* !ksr1 */
-#else
- ioctl (tty, TCXONC, 1); /* Simulate a ^Q. */
-#endif /* !TERMIOS_TTY_DRIVER */
-
-#endif /* 0 */
-
- return 0;
-}
-
-static void
-prepare_terminal_settings (meta_flag, oldtio, tiop)
- int meta_flag;
- TIOTYPE oldtio, *tiop;
-{
- _rl_echoing_p = (oldtio.c_lflag & ECHO);
-#if defined (ECHOCTL)
- _rl_echoctl = (oldtio.c_lflag & ECHOCTL);
-#endif
-
- tiop->c_lflag &= ~(ICANON | ECHO);
-
- if ((unsigned char) oldtio.c_cc[VEOF] != (unsigned char) _POSIX_VDISABLE)
- _rl_eof_char = oldtio.c_cc[VEOF];
-
-#if defined (USE_XON_XOFF)
-#if defined (IXANY)
- tiop->c_iflag &= ~(IXON | IXOFF | IXANY);
-#else
- /* `strict' Posix systems do not define IXANY. */
- tiop->c_iflag &= ~(IXON | IXOFF);
-#endif /* IXANY */
-#endif /* USE_XON_XOFF */
-
- /* Only turn this off if we are using all 8 bits. */
- if (((tiop->c_cflag & CSIZE) == CS8) || meta_flag)
- tiop->c_iflag &= ~(ISTRIP | INPCK);
-
- /* Make sure we differentiate between CR and NL on input. */
- tiop->c_iflag &= ~(ICRNL | INLCR);
-
-#if !defined (HANDLE_SIGNALS)
- tiop->c_lflag &= ~ISIG;
-#else
- tiop->c_lflag |= ISIG;
-#endif
-
- tiop->c_cc[VMIN] = 1;
- tiop->c_cc[VTIME] = 0;
-
-#if defined (FLUSHO)
- if (OUTPUT_BEING_FLUSHED (tiop))
- {
- tiop->c_lflag &= ~FLUSHO;
- oldtio.c_lflag &= ~FLUSHO;
- }
-#endif
-
- /* Turn off characters that we need on Posix systems with job control,
- just to be sure. This includes ^Y and ^V. This should not really
- be necessary. */
-#if defined (TERMIOS_TTY_DRIVER) && defined (_POSIX_VDISABLE)
-
-#if defined (VLNEXT)
- tiop->c_cc[VLNEXT] = _POSIX_VDISABLE;
-#endif
-
-#if defined (VDSUSP)
- tiop->c_cc[VDSUSP] = _POSIX_VDISABLE;
-#endif
-
-#endif /* TERMIOS_TTY_DRIVER && _POSIX_VDISABLE */
-}
-#endif /* !NEW_TTY_DRIVER */
-
-/* Put the terminal in CBREAK mode so that we can detect key presses. */
-#if defined (NO_TTY_DRIVER)
-void
-rl_prep_terminal (meta_flag)
- int meta_flag;
-{
- _rl_echoing_p = 1;
-}
-
-void
-rl_deprep_terminal ()
-{
-}
-
-#else /* ! NO_TTY_DRIVER */
-void
-rl_prep_terminal (meta_flag)
- int meta_flag;
-{
- int tty;
- TIOTYPE tio;
-
- if (terminal_prepped)
- return;
-
- /* Try to keep this function from being INTerrupted. */
- _rl_block_sigint ();
-
- tty = rl_instream ? fileno (rl_instream) : fileno (stdin);
-
- if (get_tty_settings (tty, &tio) < 0)
- {
-#if defined (ENOTSUP)
- /* MacOS X and Linux, at least, lie about the value of errno if
- tcgetattr fails. */
- if (errno == ENOTTY || errno == EINVAL || errno == ENOTSUP)
-#else
- if (errno == ENOTTY || errno == EINVAL)
-#endif
- _rl_echoing_p = 1; /* XXX */
-
- _rl_release_sigint ();
- return;
- }
-
- otio = tio;
-
- if (_rl_bind_stty_chars)
- {
-#if defined (VI_MODE)
- /* If editing in vi mode, make sure we restore the bindings in the
- insertion keymap no matter what keymap we ended up in. */
- if (rl_editing_mode == vi_mode)
- rl_tty_unset_default_bindings (vi_insertion_keymap);
- else
-#endif
- rl_tty_unset_default_bindings (_rl_keymap);
- }
- save_tty_chars (&otio);
- RL_SETSTATE(RL_STATE_TTYCSAVED);
- if (_rl_bind_stty_chars)
- {
-#if defined (VI_MODE)
- /* If editing in vi mode, make sure we set the bindings in the
- insertion keymap no matter what keymap we ended up in. */
- if (rl_editing_mode == vi_mode)
- _rl_bind_tty_special_chars (vi_insertion_keymap, tio);
- else
-#endif
- _rl_bind_tty_special_chars (_rl_keymap, tio);
- }
-
- prepare_terminal_settings (meta_flag, otio, &tio);
-
- if (set_tty_settings (tty, &tio) < 0)
- {
- _rl_release_sigint ();
- return;
- }
-
- if (_rl_enable_keypad)
- _rl_control_keypad (1);
-
- fflush (rl_outstream);
- terminal_prepped = 1;
- RL_SETSTATE(RL_STATE_TERMPREPPED);
-
- _rl_release_sigint ();
-}
-
-/* Restore the terminal's normal settings and modes. */
-void
-rl_deprep_terminal ()
-{
- int tty;
-
- if (!terminal_prepped)
- return;
-
- /* Try to keep this function from being interrupted. */
- _rl_block_sigint ();
-
- tty = rl_instream ? fileno (rl_instream) : fileno (stdout);
-
- if (_rl_enable_keypad)
- _rl_control_keypad (0);
-
- fflush (rl_outstream);
-
- if (set_tty_settings (tty, &otio) < 0)
- {
- _rl_release_sigint ();
- return;
- }
-
- terminal_prepped = 0;
- RL_UNSETSTATE(RL_STATE_TERMPREPPED);
-
- _rl_release_sigint ();
-}
-#endif /* !NO_TTY_DRIVER */
-\f
-/* **************************************************************** */
-/* */
-/* Bogus Flow Control */
-/* */
-/* **************************************************************** */
-
-int
-rl_restart_output (count, key)
- int count, key;
-{
-#if defined (__MINGW32__)
- return 0;
-#else /* !__MING32__ */
-
- int fildes = fileno (rl_outstream);
-#if defined (TIOCSTART)
-#if defined (apollo)
- ioctl (&fildes, TIOCSTART, 0);
-#else
- ioctl (fildes, TIOCSTART, 0);
-#endif /* apollo */
-
-#else /* !TIOCSTART */
-# if defined (TERMIOS_TTY_DRIVER)
-# if defined (__ksr1__)
- if (ksrflow)
- {
- ksrflow = 0;
- tcflow (fildes, TCOON);
- }
-# else /* !ksr1 */
- tcflow (fildes, TCOON); /* Simulate a ^Q. */
-# endif /* !ksr1 */
-# else /* !TERMIOS_TTY_DRIVER */
-# if defined (TCXONC)
- ioctl (fildes, TCXONC, TCOON);
-# endif /* TCXONC */
-# endif /* !TERMIOS_TTY_DRIVER */
-#endif /* !TIOCSTART */
-
- return 0;
-#endif /* !__MINGW32__ */
-}
-
-int
-rl_stop_output (count, key)
- int count, key;
-{
-#if defined (__MINGW32__)
- return 0;
-#else
-
- int fildes = fileno (rl_instream);
-
-#if defined (TIOCSTOP)
-# if defined (apollo)
- ioctl (&fildes, TIOCSTOP, 0);
-# else
- ioctl (fildes, TIOCSTOP, 0);
-# endif /* apollo */
-#else /* !TIOCSTOP */
-# if defined (TERMIOS_TTY_DRIVER)
-# if defined (__ksr1__)
- ksrflow = 1;
-# endif /* ksr1 */
- tcflow (fildes, TCOOFF);
-# else
-# if defined (TCXONC)
- ioctl (fildes, TCXONC, TCOON);
-# endif /* TCXONC */
-# endif /* !TERMIOS_TTY_DRIVER */
-#endif /* !TIOCSTOP */
-
- return 0;
-#endif /* !__MINGW32__ */
-}
-
-/* **************************************************************** */
-/* */
-/* Default Key Bindings */
-/* */
-/* **************************************************************** */
-
-#if !defined (NO_TTY_DRIVER)
-#define SET_SPECIAL(sc, func) set_special_char(kmap, &ttybuff, sc, func)
-#endif
-
-#if defined (NO_TTY_DRIVER)
-
-#define SET_SPECIAL(sc, func)
-#define RESET_SPECIAL(c)
-
-#elif defined (NEW_TTY_DRIVER)
-static void
-set_special_char (kmap, tiop, sc, func)
- Keymap kmap;
- TIOTYPE *tiop;
- int sc;
- rl_command_func_t *func;
-{
- if (sc != -1 && kmap[(unsigned char)sc].type == ISFUNC)
- kmap[(unsigned char)sc].function = func;
-}
-
-#define RESET_SPECIAL(c) \
- if (c != -1 && kmap[(unsigned char)c].type == ISFUNC) \
- kmap[(unsigned char)c].function = rl_insert;
-
-static void
-_rl_bind_tty_special_chars (kmap, ttybuff)
- Keymap kmap;
- TIOTYPE ttybuff;
-{
- if (ttybuff.flags & SGTTY_SET)
- {
- SET_SPECIAL (ttybuff.sgttyb.sg_erase, rl_rubout);
- SET_SPECIAL (ttybuff.sgttyb.sg_kill, rl_unix_line_discard);
- }
-
-# if defined (TIOCGLTC)
- if (ttybuff.flags & LTCHARS_SET)
- {
- SET_SPECIAL (ttybuff.ltchars.t_werasc, rl_unix_word_rubout);
- SET_SPECIAL (ttybuff.ltchars.t_lnextc, rl_quoted_insert);
- }
-# endif /* TIOCGLTC */
-}
-
-#else /* !NEW_TTY_DRIVER */
-static void
-set_special_char (kmap, tiop, sc, func)
- Keymap kmap;
- TIOTYPE *tiop;
- int sc;
- rl_command_func_t *func;
-{
- unsigned char uc;
-
- uc = tiop->c_cc[sc];
- if (uc != (unsigned char)_POSIX_VDISABLE && kmap[uc].type == ISFUNC)
- kmap[uc].function = func;
-}
-
-/* used later */
-#define RESET_SPECIAL(uc) \
- if (uc != (unsigned char)_POSIX_VDISABLE && kmap[uc].type == ISFUNC) \
- kmap[uc].function = rl_insert;
-
-static void
-_rl_bind_tty_special_chars (kmap, ttybuff)
- Keymap kmap;
- TIOTYPE ttybuff;
-{
- SET_SPECIAL (VERASE, rl_rubout);
- SET_SPECIAL (VKILL, rl_unix_line_discard);
-
-# if defined (VLNEXT) && defined (TERMIOS_TTY_DRIVER)
- SET_SPECIAL (VLNEXT, rl_quoted_insert);
-# endif /* VLNEXT && TERMIOS_TTY_DRIVER */
-
-# if defined (VWERASE) && defined (TERMIOS_TTY_DRIVER)
- SET_SPECIAL (VWERASE, rl_unix_word_rubout);
-# endif /* VWERASE && TERMIOS_TTY_DRIVER */
-}
-
-#endif /* !NEW_TTY_DRIVER */
-
-/* Set the system's default editing characters to their readline equivalents
- in KMAP. Should be static, now that we have rl_tty_set_default_bindings. */
-void
-rltty_set_default_bindings (kmap)
- Keymap kmap;
-{
-#if !defined (NO_TTY_DRIVER)
- TIOTYPE ttybuff;
- int tty;
-
- tty = fileno (rl_instream);
-
- if (get_tty_settings (tty, &ttybuff) == 0)
- _rl_bind_tty_special_chars (kmap, ttybuff);
-#endif
-}
-
-/* New public way to set the system default editing chars to their readline
- equivalents. */
-void
-rl_tty_set_default_bindings (kmap)
- Keymap kmap;
-{
- rltty_set_default_bindings (kmap);
-}
-
-/* Rebind all of the tty special chars that readline worries about back
- to self-insert. Call this before saving the current terminal special
- chars with save_tty_chars(). This only works on POSIX termios or termio
- systems. */
-void
-rl_tty_unset_default_bindings (kmap)
- Keymap kmap;
-{
- /* Don't bother before we've saved the tty special chars at least once. */
- if (RL_ISSTATE(RL_STATE_TTYCSAVED) == 0)
- return;
-
- RESET_SPECIAL (_rl_tty_chars.t_erase);
- RESET_SPECIAL (_rl_tty_chars.t_kill);
-
-# if defined (VLNEXT) && defined (TERMIOS_TTY_DRIVER)
- RESET_SPECIAL (_rl_tty_chars.t_lnext);
-# endif /* VLNEXT && TERMIOS_TTY_DRIVER */
-
-# if defined (VWERASE) && defined (TERMIOS_TTY_DRIVER)
- RESET_SPECIAL (_rl_tty_chars.t_werase);
-# endif /* VWERASE && TERMIOS_TTY_DRIVER */
-}
-
-#if defined (HANDLE_SIGNALS)
-
-#if defined (NEW_TTY_DRIVER) || defined (NO_TTY_DRIVER)
-int
-_rl_disable_tty_signals ()
-{
- return 0;
-}
-
-int
-_rl_restore_tty_signals ()
-{
- return 0;
-}
-#else
-
-static TIOTYPE sigstty, nosigstty;
-static int tty_sigs_disabled = 0;
-
-int
-_rl_disable_tty_signals ()
-{
- if (tty_sigs_disabled)
- return 0;
-
- if (_get_tty_settings (fileno (rl_instream), &sigstty) < 0)
- return -1;
-
- nosigstty = sigstty;
-
- nosigstty.c_lflag &= ~ISIG;
- nosigstty.c_iflag &= ~IXON;
-
- if (_set_tty_settings (fileno (rl_instream), &nosigstty) < 0)
- return (_set_tty_settings (fileno (rl_instream), &sigstty));
-
- tty_sigs_disabled = 1;
- return 0;
-}
-
-int
-_rl_restore_tty_signals ()
-{
- int r;
-
- if (tty_sigs_disabled == 0)
- return 0;
-
- r = _set_tty_settings (fileno (rl_instream), &sigstty);
-
- if (r == 0)
- tty_sigs_disabled = 0;
-
- return r;
-}
-#endif /* !NEW_TTY_DRIVER */
-
-#endif /* HANDLE_SIGNALS */
+++ /dev/null
-/* rltypedefs.h -- Type declarations for readline functions. */
-
-/* Copyright (C) 2000-2009 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#ifndef _RL_TYPEDEFS_H_
-#define _RL_TYPEDEFS_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* Old-style */
-
-#if !defined (_FUNCTION_DEF)
-# define _FUNCTION_DEF
-
-typedef int Function ();
-typedef void VFunction ();
-typedef char *CPFunction ();
-typedef char **CPPFunction ();
-
-#endif /* _FUNCTION_DEF */
-
-/* New style. */
-
-#if !defined (_RL_FUNCTION_TYPEDEF)
-# define _RL_FUNCTION_TYPEDEF
-
-/* Bindable functions */
-typedef int rl_command_func_t PARAMS((int, int));
-
-/* Typedefs for the completion system */
-typedef char *rl_compentry_func_t PARAMS((const char *, int));
-typedef char **rl_completion_func_t PARAMS((const char *, int, int));
-
-typedef char *rl_quote_func_t PARAMS((char *, int, char *));
-typedef char *rl_dequote_func_t PARAMS((char *, int));
-
-typedef int rl_compignore_func_t PARAMS((char **));
-
-typedef void rl_compdisp_func_t PARAMS((char **, int, int));
-
-/* Type for input and pre-read hook functions like rl_event_hook */
-typedef int rl_hook_func_t PARAMS((void));
-
-/* Input function type */
-typedef int rl_getc_func_t PARAMS((FILE *));
-
-/* Generic function that takes a character buffer (which could be the readline
- line buffer) and an index into it (which could be rl_point) and returns
- an int. */
-typedef int rl_linebuf_func_t PARAMS((char *, int));
-
-/* `Generic' function pointer typedefs */
-typedef int rl_intfunc_t PARAMS((int));
-#define rl_ivoidfunc_t rl_hook_func_t
-typedef int rl_icpfunc_t PARAMS((char *));
-typedef int rl_icppfunc_t PARAMS((char **));
-
-typedef void rl_voidfunc_t PARAMS((void));
-typedef void rl_vintfunc_t PARAMS((int));
-typedef void rl_vcpfunc_t PARAMS((char *));
-typedef void rl_vcppfunc_t PARAMS((char **));
-
-typedef char *rl_cpvfunc_t PARAMS((void));
-typedef char *rl_cpifunc_t PARAMS((int));
-typedef char *rl_cpcpfunc_t PARAMS((char *));
-typedef char *rl_cpcppfunc_t PARAMS((char **));
-
-#endif /* _RL_FUNCTION_TYPEDEF */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _RL_TYPEDEFS_H_ */
+++ /dev/null
-/* search.c - code for non-incremental searching in emacs and vi modes. */
-
-/* Copyright (C) 1992-2009 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <sys/types.h>
-#include <stdio.h>
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif
-
-#include "rldefs.h"
-#include "rlmbutil.h"
-
-#include "readline.h"
-#include "history.h"
-#include "histlib.h"
-
-#include "rlprivate.h"
-#include "xmalloc.h"
-
-#ifdef abs
-# undef abs
-#endif
-#define abs(x) (((x) >= 0) ? (x) : -(x))
-
-_rl_search_cxt *_rl_nscxt = 0;
-
-extern HIST_ENTRY *_rl_saved_line_for_history;
-
-/* Functions imported from the rest of the library. */
-extern int _rl_free_history_entry PARAMS((HIST_ENTRY *));
-
-static char *noninc_search_string = (char *) NULL;
-static int noninc_history_pos;
-
-static char *prev_line_found = (char *) NULL;
-
-static int rl_history_search_len;
-static int rl_history_search_pos;
-static int rl_history_search_flags;
-
-static char *history_search_string;
-static int history_string_size;
-
-static void make_history_line_current PARAMS((HIST_ENTRY *));
-static int noninc_search_from_pos PARAMS((char *, int, int));
-static int noninc_dosearch PARAMS((char *, int));
-static int noninc_search PARAMS((int, int));
-static int rl_history_search_internal PARAMS((int, int));
-static void rl_history_search_reinit PARAMS((int));
-
-static _rl_search_cxt *_rl_nsearch_init PARAMS((int, int));
-static int _rl_nsearch_cleanup PARAMS((_rl_search_cxt *, int));
-static void _rl_nsearch_abort PARAMS((_rl_search_cxt *));
-static int _rl_nsearch_dispatch PARAMS((_rl_search_cxt *, int));
-
-/* Make the data from the history entry ENTRY be the contents of the
- current line. This doesn't do anything with rl_point; the caller
- must set it. */
-static void
-make_history_line_current (entry)
- HIST_ENTRY *entry;
-{
- _rl_replace_text (entry->line, 0, rl_end);
- _rl_fix_point (1);
-#if defined (VI_MODE)
- if (rl_editing_mode == vi_mode)
- /* POSIX.2 says that the `U' command doesn't affect the copy of any
- command lines to the edit line. We're going to implement that by
- making the undo list start after the matching line is copied to the
- current editing buffer. */
- rl_free_undo_list ();
-#endif
-
- if (_rl_saved_line_for_history)
- _rl_free_history_entry (_rl_saved_line_for_history);
- _rl_saved_line_for_history = (HIST_ENTRY *)NULL;
-}
-
-/* Search the history list for STRING starting at absolute history position
- POS. If STRING begins with `^', the search must match STRING at the
- beginning of a history line, otherwise a full substring match is performed
- for STRING. DIR < 0 means to search backwards through the history list,
- DIR >= 0 means to search forward. */
-static int
-noninc_search_from_pos (string, pos, dir)
- char *string;
- int pos, dir;
-{
- int ret, old;
-
- if (pos < 0)
- return -1;
-
- old = where_history ();
- if (history_set_pos (pos) == 0)
- return -1;
-
- RL_SETSTATE(RL_STATE_SEARCH);
- if (*string == '^')
- ret = history_search_prefix (string + 1, dir);
- else
- ret = history_search (string, dir);
- RL_UNSETSTATE(RL_STATE_SEARCH);
-
- if (ret != -1)
- ret = where_history ();
-
- history_set_pos (old);
- return (ret);
-}
-
-/* Search for a line in the history containing STRING. If DIR is < 0, the
- search is backwards through previous entries, else through subsequent
- entries. Returns 1 if the search was successful, 0 otherwise. */
-static int
-noninc_dosearch (string, dir)
- char *string;
- int dir;
-{
- int oldpos, pos;
- HIST_ENTRY *entry;
-
- if (string == 0 || *string == '\0' || noninc_history_pos < 0)
- {
- rl_ding ();
- return 0;
- }
-
- pos = noninc_search_from_pos (string, noninc_history_pos + dir, dir);
- if (pos == -1)
- {
- /* Search failed, current history position unchanged. */
- rl_maybe_unsave_line ();
- rl_clear_message ();
- rl_point = 0;
- rl_ding ();
- return 0;
- }
-
- noninc_history_pos = pos;
-
- oldpos = where_history ();
- history_set_pos (noninc_history_pos);
- entry = current_history ();
-#if defined (VI_MODE)
- if (rl_editing_mode != vi_mode)
-#endif
- history_set_pos (oldpos);
-
- make_history_line_current (entry);
-
- rl_point = 0;
- rl_mark = rl_end;
-
- rl_clear_message ();
- return 1;
-}
-
-static _rl_search_cxt *
-_rl_nsearch_init (dir, pchar)
- int dir, pchar;
-{
- _rl_search_cxt *cxt;
- char *p;
-
- cxt = _rl_scxt_alloc (RL_SEARCH_NSEARCH, 0);
- if (dir < 0)
- cxt->sflags |= SF_REVERSE; /* not strictly needed */
-
- cxt->direction = dir;
- cxt->history_pos = cxt->save_line;
-
- rl_maybe_save_line ();
-
- /* Clear the undo list, since reading the search string should create its
- own undo list, and the whole list will end up being freed when we
- finish reading the search string. */
- rl_undo_list = 0;
-
- /* Use the line buffer to read the search string. */
- rl_line_buffer[0] = 0;
- rl_end = rl_point = 0;
-
- p = _rl_make_prompt_for_search (pchar ? pchar : ':');
- rl_message ("%s", p, 0);
- xfree (p);
-
- RL_SETSTATE(RL_STATE_NSEARCH);
-
- _rl_nscxt = cxt;
-
- return cxt;
-}
-
-static int
-_rl_nsearch_cleanup (cxt, r)
- _rl_search_cxt *cxt;
- int r;
-{
- _rl_scxt_dispose (cxt, 0);
- _rl_nscxt = 0;
-
- RL_UNSETSTATE(RL_STATE_NSEARCH);
-
- return (r != 1);
-}
-
-static void
-_rl_nsearch_abort (cxt)
- _rl_search_cxt *cxt;
-{
- rl_maybe_unsave_line ();
- rl_clear_message ();
- rl_point = cxt->save_point;
- rl_mark = cxt->save_mark;
- rl_restore_prompt ();
-
- RL_UNSETSTATE (RL_STATE_NSEARCH);
-}
-
-/* Process just-read character C according to search context CXT. Return -1
- if the caller should abort the search, 0 if we should break out of the
- loop, and 1 if we should continue to read characters. */
-static int
-_rl_nsearch_dispatch (cxt, c)
- _rl_search_cxt *cxt;
- int c;
-{
- switch (c)
- {
- case CTRL('W'):
- rl_unix_word_rubout (1, c);
- break;
-
- case CTRL('U'):
- rl_unix_line_discard (1, c);
- break;
-
- case RETURN:
- case NEWLINE:
- return 0;
-
- case CTRL('H'):
- case RUBOUT:
- if (rl_point == 0)
- {
- _rl_nsearch_abort (cxt);
- return -1;
- }
- _rl_rubout_char (1, c);
- break;
-
- case CTRL('C'):
- case CTRL('G'):
- rl_ding ();
- _rl_nsearch_abort (cxt);
- return -1;
-
- default:
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- rl_insert_text (cxt->mb);
- else
-#endif
- _rl_insert_char (1, c);
- break;
- }
-
- (*rl_redisplay_function) ();
- return 1;
-}
-
-/* Perform one search according to CXT, using NONINC_SEARCH_STRING. Return
- -1 if the search should be aborted, any other value means to clean up
- using _rl_nsearch_cleanup (). Returns 1 if the search was successful,
- 0 otherwise. */
-static int
-_rl_nsearch_dosearch (cxt)
- _rl_search_cxt *cxt;
-{
- rl_mark = cxt->save_mark;
-
- /* If rl_point == 0, we want to re-use the previous search string and
- start from the saved history position. If there's no previous search
- string, punt. */
- if (rl_point == 0)
- {
- if (noninc_search_string == 0)
- {
- rl_ding ();
- rl_restore_prompt ();
- RL_UNSETSTATE (RL_STATE_NSEARCH);
- return -1;
- }
- }
- else
- {
- /* We want to start the search from the current history position. */
- noninc_history_pos = cxt->save_line;
- FREE (noninc_search_string);
- noninc_search_string = savestring (rl_line_buffer);
-
- /* If we don't want the subsequent undo list generated by the search
- matching a history line to include the contents of the search string,
- we need to clear rl_line_buffer here. For now, we just clear the
- undo list generated by reading the search string. (If the search
- fails, the old undo list will be restored by rl_maybe_unsave_line.) */
- rl_free_undo_list ();
- }
-
- rl_restore_prompt ();
- return (noninc_dosearch (noninc_search_string, cxt->direction));
-}
-
-/* Search non-interactively through the history list. DIR < 0 means to
- search backwards through the history of previous commands; otherwise
- the search is for commands subsequent to the current position in the
- history list. PCHAR is the character to use for prompting when reading
- the search string; if not specified (0), it defaults to `:'. */
-static int
-noninc_search (dir, pchar)
- int dir;
- int pchar;
-{
- _rl_search_cxt *cxt;
- int c, r;
-
- cxt = _rl_nsearch_init (dir, pchar);
-
- if (RL_ISSTATE (RL_STATE_CALLBACK))
- return (0);
-
- /* Read the search string. */
- r = 0;
- while (1)
- {
- c = _rl_search_getchar (cxt);
-
- if (c == 0)
- break;
-
- r = _rl_nsearch_dispatch (cxt, c);
- if (r < 0)
- return 1;
- else if (r == 0)
- break;
- }
-
- r = _rl_nsearch_dosearch (cxt);
- return ((r >= 0) ? _rl_nsearch_cleanup (cxt, r) : (r != 1));
-}
-
-/* Search forward through the history list for a string. If the vi-mode
- code calls this, KEY will be `?'. */
-int
-rl_noninc_forward_search (count, key)
- int count, key;
-{
- return noninc_search (1, (key == '?') ? '?' : 0);
-}
-
-/* Reverse search the history list for a string. If the vi-mode code
- calls this, KEY will be `/'. */
-int
-rl_noninc_reverse_search (count, key)
- int count, key;
-{
- return noninc_search (-1, (key == '/') ? '/' : 0);
-}
-
-/* Search forward through the history list for the last string searched
- for. If there is no saved search string, abort. */
-int
-rl_noninc_forward_search_again (count, key)
- int count, key;
-{
- int r;
-
- if (!noninc_search_string)
- {
- rl_ding ();
- return (-1);
- }
- r = noninc_dosearch (noninc_search_string, 1);
- return (r != 1);
-}
-
-/* Reverse search in the history list for the last string searched
- for. If there is no saved search string, abort. */
-int
-rl_noninc_reverse_search_again (count, key)
- int count, key;
-{
- int r;
-
- if (!noninc_search_string)
- {
- rl_ding ();
- return (-1);
- }
- r = noninc_dosearch (noninc_search_string, -1);
- return (r != 1);
-}
-
-#if defined (READLINE_CALLBACKS)
-int
-_rl_nsearch_callback (cxt)
- _rl_search_cxt *cxt;
-{
- int c, r;
-
- c = _rl_search_getchar (cxt);
- r = _rl_nsearch_dispatch (cxt, c);
- if (r != 0)
- return 1;
-
- r = _rl_nsearch_dosearch (cxt);
- return ((r >= 0) ? _rl_nsearch_cleanup (cxt, r) : (r != 1));
-}
-#endif
-
-static int
-rl_history_search_internal (count, dir)
- int count, dir;
-{
- HIST_ENTRY *temp;
- int ret, oldpos;
- char *t;
-
- rl_maybe_save_line ();
- temp = (HIST_ENTRY *)NULL;
-
- /* Search COUNT times through the history for a line matching
- history_search_string. If history_search_string[0] == '^', the
- line must match from the start; otherwise any substring can match.
- When this loop finishes, TEMP, if non-null, is the history line to
- copy into the line buffer. */
- while (count)
- {
- ret = noninc_search_from_pos (history_search_string, rl_history_search_pos + dir, dir);
- if (ret == -1)
- break;
-
- /* Get the history entry we found. */
- rl_history_search_pos = ret;
- oldpos = where_history ();
- history_set_pos (rl_history_search_pos);
- temp = current_history ();
- history_set_pos (oldpos);
-
- /* Don't find multiple instances of the same line. */
- if (prev_line_found && STREQ (prev_line_found, temp->line))
- continue;
- prev_line_found = temp->line;
- count--;
- }
-
- /* If we didn't find anything at all, return. */
- if (temp == 0)
- {
- rl_maybe_unsave_line ();
- rl_ding ();
- /* If you don't want the saved history line (last match) to show up
- in the line buffer after the search fails, change the #if 0 to
- #if 1 */
-#if 0
- if (rl_point > rl_history_search_len)
- {
- rl_point = rl_end = rl_history_search_len;
- rl_line_buffer[rl_end] = '\0';
- rl_mark = 0;
- }
-#else
- rl_point = rl_history_search_len; /* rl_maybe_unsave_line changes it */
- rl_mark = rl_end;
-#endif
- return 1;
- }
-
- /* Copy the line we found into the current line buffer. */
- make_history_line_current (temp);
-
- if (rl_history_search_flags & ANCHORED_SEARCH)
- rl_point = rl_history_search_len; /* easy case */
- else
- {
- t = strstr (rl_line_buffer, history_search_string);
- rl_point = t ? (int)(t - rl_line_buffer) + rl_history_search_len : rl_end;
- }
- rl_mark = rl_end;
-
- return 0;
-}
-
-static void
-rl_history_search_reinit (flags)
- int flags;
-{
- int sind;
-
- rl_history_search_pos = where_history ();
- rl_history_search_len = rl_point;
- rl_history_search_flags = flags;
-
- prev_line_found = (char *)NULL;
- if (rl_point)
- {
- /* Allocate enough space for anchored and non-anchored searches */
- if (rl_history_search_len >= history_string_size - 2)
- {
- history_string_size = rl_history_search_len + 2;
- history_search_string = (char *)xrealloc (history_search_string, history_string_size);
- }
- sind = 0;
- if (flags & ANCHORED_SEARCH)
- history_search_string[sind++] = '^';
- strncpy (history_search_string + sind, rl_line_buffer, rl_point);
- history_search_string[rl_point + sind] = '\0';
- }
- _rl_free_saved_history_line ();
-}
-
-/* Search forward in the history for the string of characters
- from the start of the line to rl_point. This is a non-incremental
- search. */
-int
-rl_history_search_forward (count, ignore)
- int count, ignore;
-{
- if (count == 0)
- return (0);
-
- if (rl_last_func != rl_history_search_forward &&
- rl_last_func != rl_history_search_backward)
- rl_history_search_reinit (ANCHORED_SEARCH);
-
- if (rl_history_search_len == 0)
- return (rl_get_next_history (count, ignore));
- return (rl_history_search_internal (abs (count), (count > 0) ? 1 : -1));
-}
-
-/* Search backward through the history for the string of characters
- from the start of the line to rl_point. This is a non-incremental
- search. */
-int
-rl_history_search_backward (count, ignore)
- int count, ignore;
-{
- if (count == 0)
- return (0);
-
- if (rl_last_func != rl_history_search_forward &&
- rl_last_func != rl_history_search_backward)
- rl_history_search_reinit (ANCHORED_SEARCH);
-
- if (rl_history_search_len == 0)
- return (rl_get_previous_history (count, ignore));
- return (rl_history_search_internal (abs (count), (count > 0) ? -1 : 1));
-}
+++ /dev/null
-/* shell.c -- readline utility functions that are normally provided by
- bash when readline is linked as part of the shell. */
-
-/* Copyright (C) 1997-2009 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <sys/types.h>
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif /* HAVE_STDLIB_H */
-
-#if defined (HAVE_STRING_H)
-# include <string.h>
-#else
-# include <strings.h>
-#endif /* !HAVE_STRING_H */
-
-#if defined (HAVE_LIMITS_H)
-# include <limits.h>
-#endif
-
-#if defined (HAVE_FCNTL_H)
-#include <fcntl.h>
-#endif
-#if defined (HAVE_PWD_H)
-#include <pwd.h>
-#endif
-
-#include <stdio.h>
-
-#include "rlstdc.h"
-#include "rlshell.h"
-#include "xmalloc.h"
-
-#if defined (HAVE_GETPWUID) && !defined (HAVE_GETPW_DECLS)
-extern struct passwd *getpwuid PARAMS((uid_t));
-#endif /* HAVE_GETPWUID && !HAVE_GETPW_DECLS */
-
-#ifndef NULL
-# define NULL 0
-#endif
-
-#ifndef CHAR_BIT
-# define CHAR_BIT 8
-#endif
-
-/* Nonzero if the integer type T is signed. */
-#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
-
-/* Bound on length of the string representing an integer value of type T.
- Subtract one for the sign bit if T is signed;
- 302 / 1000 is log10 (2) rounded up;
- add one for integer division truncation;
- add one more for a minus sign if t is signed. */
-#define INT_STRLEN_BOUND(t) \
- ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 \
- + 1 + TYPE_SIGNED (t))
-
-/* All of these functions are resolved from bash if we are linking readline
- as part of bash. */
-
-/* Does shell-like quoting using single quotes. */
-char *
-sh_single_quote (string)
- char *string;
-{
- register int c;
- char *result, *r, *s;
-
- result = (char *)xmalloc (3 + (4 * strlen (string)));
- r = result;
- *r++ = '\'';
-
- for (s = string; s && (c = *s); s++)
- {
- *r++ = c;
-
- if (c == '\'')
- {
- *r++ = '\\'; /* insert escaped single quote */
- *r++ = '\'';
- *r++ = '\''; /* start new quoted string */
- }
- }
-
- *r++ = '\'';
- *r = '\0';
-
- return (result);
-}
-
-/* Set the environment variables LINES and COLUMNS to lines and cols,
- respectively. */
-void
-sh_set_lines_and_columns (lines, cols)
- int lines, cols;
-{
- char *b;
-
-#if defined (HAVE_SETENV)
- b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1);
- sprintf (b, "%d", lines);
- setenv ("LINES", b, 1);
- xfree (b);
-
- b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1);
- sprintf (b, "%d", cols);
- setenv ("COLUMNS", b, 1);
- xfree (b);
-#else /* !HAVE_SETENV */
-# if defined (HAVE_PUTENV)
- b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("LINES=") + 1);
- sprintf (b, "LINES=%d", lines);
- putenv (b);
-
- b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("COLUMNS=") + 1);
- sprintf (b, "COLUMNS=%d", cols);
- putenv (b);
-# endif /* HAVE_PUTENV */
-#endif /* !HAVE_SETENV */
-}
-
-char *
-sh_get_env_value (varname)
- const char *varname;
-{
- return ((char *)getenv (varname));
-}
-
-char *
-sh_get_home_dir ()
-{
- char *home_dir;
- struct passwd *entry;
-
- home_dir = (char *)NULL;
-#if defined (HAVE_GETPWUID)
-# if defined (__TANDEM)
- entry = getpwnam (getlogin ());
-# else
- entry = getpwuid (getuid ());
-# endif
- if (entry)
- home_dir = entry->pw_dir;
-#endif
- return (home_dir);
-}
-
-#if !defined (O_NDELAY)
-# if defined (FNDELAY)
-# define O_NDELAY FNDELAY
-# endif
-#endif
-
-int
-sh_unset_nodelay_mode (fd)
- int fd;
-{
-#if defined (HAVE_FCNTL)
- int flags, bflags;
-
- if ((flags = fcntl (fd, F_GETFL, 0)) < 0)
- return -1;
-
- bflags = 0;
-
-#ifdef O_NONBLOCK
- bflags |= O_NONBLOCK;
-#endif
-
-#ifdef O_NDELAY
- bflags |= O_NDELAY;
-#endif
-
- if (flags & bflags)
- {
- flags &= ~bflags;
- return (fcntl (fd, F_SETFL, flags));
- }
-#endif
-
- return 0;
-}
+++ /dev/null
-/* signals.c -- signal handling support for readline. */
-
-/* Copyright (C) 1987-2011 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <stdio.h> /* Just for NULL. Yuck. */
-#include <sys/types.h>
-#include <signal.h>
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-
-/* System-specific feature definitions and include files. */
-#include "rldefs.h"
-
-#if defined (GWINSZ_IN_SYS_IOCTL)
-# include <sys/ioctl.h>
-#endif /* GWINSZ_IN_SYS_IOCTL */
-
-/* Some standard library routines. */
-#include "readline.h"
-#include "history.h"
-
-#include "rlprivate.h"
-
-#if defined (HANDLE_SIGNALS)
-
-#if !defined (RETSIGTYPE)
-# if defined (VOID_SIGHANDLER)
-# define RETSIGTYPE void
-# else
-# define RETSIGTYPE int
-# endif /* !VOID_SIGHANDLER */
-#endif /* !RETSIGTYPE */
-
-#if defined (VOID_SIGHANDLER)
-# define SIGHANDLER_RETURN return
-#else
-# define SIGHANDLER_RETURN return (0)
-#endif
-
-/* This typedef is equivalent to the one for Function; it allows us
- to say SigHandler *foo = signal (SIGKILL, SIG_IGN); */
-typedef RETSIGTYPE SigHandler ();
-
-#if defined (HAVE_POSIX_SIGNALS)
-typedef struct sigaction sighandler_cxt;
-# define rl_sigaction(s, nh, oh) sigaction(s, nh, oh)
-#else
-typedef struct { SigHandler *sa_handler; int sa_mask, sa_flags; } sighandler_cxt;
-# define sigemptyset(m)
-#endif /* !HAVE_POSIX_SIGNALS */
-
-#ifndef SA_RESTART
-# define SA_RESTART 0
-#endif
-
-static SigHandler *rl_set_sighandler PARAMS((int, SigHandler *, sighandler_cxt *));
-static void rl_maybe_set_sighandler PARAMS((int, SigHandler *, sighandler_cxt *));
-
-static RETSIGTYPE rl_signal_handler PARAMS((int));
-static RETSIGTYPE _rl_handle_signal PARAMS((int));
-
-/* Exported variables for use by applications. */
-
-/* If non-zero, readline will install its own signal handlers for
- SIGINT, SIGTERM, SIGHUP, SIGQUIT, SIGALRM, SIGTSTP, SIGTTIN, and SIGTTOU. */
-int rl_catch_signals = 1;
-
-/* If non-zero, readline will install a signal handler for SIGWINCH. */
-#ifdef SIGWINCH
-int rl_catch_sigwinch = 1;
-#else
-int rl_catch_sigwinch = 0; /* for the readline state struct in readline.c */
-#endif
-
-/* Private variables. */
-int _rl_interrupt_immediately = 0;
-int volatile _rl_caught_signal = 0; /* should be sig_atomic_t, but that requires including <signal.h> everywhere */
-
-/* If non-zero, print characters corresponding to received signals as long as
- the user has indicated his desire to do so (_rl_echo_control_chars). */
-int _rl_echoctl = 0;
-
-int _rl_intr_char = 0;
-int _rl_quit_char = 0;
-int _rl_susp_char = 0;
-
-static int signals_set_flag;
-static int sigwinch_set_flag;
-
-/* **************************************************************** */
-/* */
-/* Signal Handling */
-/* */
-/* **************************************************************** */
-
-static sighandler_cxt old_int, old_term, old_hup, old_alrm, old_quit;
-#if defined (SIGTSTP)
-static sighandler_cxt old_tstp, old_ttou, old_ttin;
-#endif
-#if defined (SIGWINCH)
-static sighandler_cxt old_winch;
-#endif
-
-/* Readline signal handler functions. */
-
-/* Called from RL_CHECK_SIGNALS() macro */
-RETSIGTYPE
-_rl_signal_handler (sig)
- int sig;
-{
- _rl_caught_signal = 0; /* XXX */
-
- if (sig == SIGWINCH)
- rl_resize_terminal ();
- else
- _rl_handle_signal (sig);
- SIGHANDLER_RETURN;
-}
-
-static RETSIGTYPE
-rl_signal_handler (sig)
- int sig;
-{
- if (_rl_interrupt_immediately || RL_ISSTATE(RL_STATE_CALLBACK))
- {
- _rl_interrupt_immediately = 0;
- _rl_handle_signal (sig);
- }
- else
- _rl_caught_signal = sig;
-
- SIGHANDLER_RETURN;
-}
-
-static RETSIGTYPE
-_rl_handle_signal (sig)
- int sig;
-{
-#if defined (HAVE_POSIX_SIGNALS)
- sigset_t set;
-#else /* !HAVE_POSIX_SIGNALS */
-# if defined (HAVE_BSD_SIGNALS)
- long omask;
-# else /* !HAVE_BSD_SIGNALS */
- sighandler_cxt dummy_cxt; /* needed for rl_set_sighandler call */
-# endif /* !HAVE_BSD_SIGNALS */
-#endif /* !HAVE_POSIX_SIGNALS */
-
- RL_SETSTATE(RL_STATE_SIGHANDLER);
-
-#if !defined (HAVE_BSD_SIGNALS) && !defined (HAVE_POSIX_SIGNALS)
- /* Since the signal will not be blocked while we are in the signal
- handler, ignore it until rl_clear_signals resets the catcher. */
-# if defined (SIGALRM)
- if (sig == SIGINT || sig == SIGALRM)
-# else
- if (sig == SIGINT)
-# endif
- rl_set_sighandler (sig, SIG_IGN, &dummy_cxt);
-#endif /* !HAVE_BSD_SIGNALS && !HAVE_POSIX_SIGNALS */
-
- switch (sig)
- {
- case SIGINT:
- _rl_reset_completion_state ();
- rl_free_line_state ();
- /* FALLTHROUGH */
-
- case SIGTERM:
- case SIGHUP:
-#if defined (SIGTSTP)
- case SIGTSTP:
- case SIGTTOU:
- case SIGTTIN:
-#endif /* SIGTSTP */
-#if defined (SIGALRM)
- case SIGALRM:
-#endif
-#if defined (SIGQUIT)
- case SIGQUIT:
-#endif
- rl_echo_signal_char (sig);
- rl_cleanup_after_signal ();
-
-#if defined (HAVE_POSIX_SIGNALS)
- sigemptyset (&set);
- sigprocmask (SIG_BLOCK, (sigset_t *)NULL, &set);
- sigdelset (&set, sig);
-#else /* !HAVE_POSIX_SIGNALS */
-# if defined (HAVE_BSD_SIGNALS)
- omask = sigblock (0);
-# endif /* HAVE_BSD_SIGNALS */
-#endif /* !HAVE_POSIX_SIGNALS */
-
-#if defined (__EMX__)
- signal (sig, SIG_ACK);
-#endif
-
-#if defined (HAVE_KILL)
- kill (getpid (), sig);
-#else
- raise (sig); /* assume we have raise */
-#endif
-
- /* Let the signal that we just sent through. */
-#if defined (HAVE_POSIX_SIGNALS)
- sigprocmask (SIG_SETMASK, &set, (sigset_t *)NULL);
-#else /* !HAVE_POSIX_SIGNALS */
-# if defined (HAVE_BSD_SIGNALS)
- sigsetmask (omask & ~(sigmask (sig)));
-# endif /* HAVE_BSD_SIGNALS */
-#endif /* !HAVE_POSIX_SIGNALS */
-
- rl_reset_after_signal ();
- }
-
- RL_UNSETSTATE(RL_STATE_SIGHANDLER);
- SIGHANDLER_RETURN;
-}
-
-#if defined (SIGWINCH)
-static RETSIGTYPE
-rl_sigwinch_handler (sig)
- int sig;
-{
- SigHandler *oh;
-
-#if defined (MUST_REINSTALL_SIGHANDLERS)
- sighandler_cxt dummy_winch;
-
- /* We don't want to change old_winch -- it holds the state of SIGWINCH
- disposition set by the calling application. We need this state
- because we call the application's SIGWINCH handler after updating
- our own idea of the screen size. */
- rl_set_sighandler (SIGWINCH, rl_sigwinch_handler, &dummy_winch);
-#endif
-
- RL_SETSTATE(RL_STATE_SIGHANDLER);
- _rl_caught_signal = sig;
-
- /* If another sigwinch handler has been installed, call it. */
- oh = (SigHandler *)old_winch.sa_handler;
- if (oh && oh != (SigHandler *)SIG_IGN && oh != (SigHandler *)SIG_DFL)
- (*oh) (sig);
-
- RL_UNSETSTATE(RL_STATE_SIGHANDLER);
- SIGHANDLER_RETURN;
-}
-#endif /* SIGWINCH */
-
-/* Functions to manage signal handling. */
-
-#if !defined (HAVE_POSIX_SIGNALS)
-static int
-rl_sigaction (sig, nh, oh)
- int sig;
- sighandler_cxt *nh, *oh;
-{
- oh->sa_handler = signal (sig, nh->sa_handler);
- return 0;
-}
-#endif /* !HAVE_POSIX_SIGNALS */
-
-/* Set up a readline-specific signal handler, saving the old signal
- information in OHANDLER. Return the old signal handler, like
- signal(). */
-static SigHandler *
-rl_set_sighandler (sig, handler, ohandler)
- int sig;
- SigHandler *handler;
- sighandler_cxt *ohandler;
-{
- sighandler_cxt old_handler;
-#if defined (HAVE_POSIX_SIGNALS)
- struct sigaction act;
-
- act.sa_handler = handler;
-# if defined (SIGWINCH)
- act.sa_flags = (sig == SIGWINCH) ? SA_RESTART : 0;
-# else
- act.sa_flags = 0;
-# endif /* SIGWINCH */
- sigemptyset (&act.sa_mask);
- sigemptyset (&ohandler->sa_mask);
- sigaction (sig, &act, &old_handler);
-#else
- old_handler.sa_handler = (SigHandler *)signal (sig, handler);
-#endif /* !HAVE_POSIX_SIGNALS */
-
- /* XXX -- assume we have memcpy */
- /* If rl_set_signals is called twice in a row, don't set the old handler to
- rl_signal_handler, because that would cause infinite recursion. */
- if (handler != rl_signal_handler || old_handler.sa_handler != rl_signal_handler)
- memcpy (ohandler, &old_handler, sizeof (sighandler_cxt));
-
- return (ohandler->sa_handler);
-}
-
-static void
-rl_maybe_set_sighandler (sig, handler, ohandler)
- int sig;
- SigHandler *handler;
- sighandler_cxt *ohandler;
-{
- sighandler_cxt dummy;
- SigHandler *oh;
-
- sigemptyset (&dummy.sa_mask);
- oh = rl_set_sighandler (sig, handler, ohandler);
- if (oh == (SigHandler *)SIG_IGN)
- rl_sigaction (sig, ohandler, &dummy);
-}
-
-int
-rl_set_signals ()
-{
- sighandler_cxt dummy;
- SigHandler *oh;
-#if defined (HAVE_POSIX_SIGNALS)
- static int sigmask_set = 0;
- static sigset_t bset, oset;
-#endif
-
-#if defined (HAVE_POSIX_SIGNALS)
- if (rl_catch_signals && sigmask_set == 0)
- {
- sigemptyset (&bset);
-
- sigaddset (&bset, SIGINT);
- sigaddset (&bset, SIGTERM);
- sigaddset (&bset, SIGHUP);
-#if defined (SIGQUIT)
- sigaddset (&bset, SIGQUIT);
-#endif
-#if defined (SIGALRM)
- sigaddset (&bset, SIGALRM);
-#endif
-#if defined (SIGTSTP)
- sigaddset (&bset, SIGTSTP);
-#endif
-#if defined (SIGTTIN)
- sigaddset (&bset, SIGTTIN);
-#endif
-#if defined (SIGTTOU)
- sigaddset (&bset, SIGTTOU);
-#endif
- sigmask_set = 1;
- }
-#endif /* HAVE_POSIX_SIGNALS */
-
- if (rl_catch_signals && signals_set_flag == 0)
- {
-#if defined (HAVE_POSIX_SIGNALS)
- sigemptyset (&oset);
- sigprocmask (SIG_BLOCK, &bset, &oset);
-#endif
-
- rl_maybe_set_sighandler (SIGINT, rl_signal_handler, &old_int);
- rl_maybe_set_sighandler (SIGTERM, rl_signal_handler, &old_term);
- rl_maybe_set_sighandler (SIGHUP, rl_signal_handler, &old_hup);
-#if defined (SIGQUIT)
- rl_maybe_set_sighandler (SIGQUIT, rl_signal_handler, &old_quit);
-#endif
-
-#if defined (SIGALRM)
- oh = rl_set_sighandler (SIGALRM, rl_signal_handler, &old_alrm);
- if (oh == (SigHandler *)SIG_IGN)
- rl_sigaction (SIGALRM, &old_alrm, &dummy);
-#if defined (HAVE_POSIX_SIGNALS) && defined (SA_RESTART)
- /* If the application using readline has already installed a signal
- handler with SA_RESTART, SIGALRM will cause reads to be restarted
- automatically, so readline should just get out of the way. Since
- we tested for SIG_IGN above, we can just test for SIG_DFL here. */
- if (oh != (SigHandler *)SIG_DFL && (old_alrm.sa_flags & SA_RESTART))
- rl_sigaction (SIGALRM, &old_alrm, &dummy);
-#endif /* HAVE_POSIX_SIGNALS */
-#endif /* SIGALRM */
-
-#if defined (SIGTSTP)
- rl_maybe_set_sighandler (SIGTSTP, rl_signal_handler, &old_tstp);
-#endif /* SIGTSTP */
-
-#if defined (SIGTTOU)
- rl_maybe_set_sighandler (SIGTTOU, rl_signal_handler, &old_ttou);
-#endif /* SIGTTOU */
-
-#if defined (SIGTTIN)
- rl_maybe_set_sighandler (SIGTTIN, rl_signal_handler, &old_ttin);
-#endif /* SIGTTIN */
-
- signals_set_flag = 1;
-
-#if defined (HAVE_POSIX_SIGNALS)
- sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL);
-#endif
- }
-
-#if defined (SIGWINCH)
- if (rl_catch_sigwinch && sigwinch_set_flag == 0)
- {
- rl_maybe_set_sighandler (SIGWINCH, rl_sigwinch_handler, &old_winch);
- sigwinch_set_flag = 1;
- }
-#endif /* SIGWINCH */
-
- return 0;
-}
-
-int
-rl_clear_signals ()
-{
- sighandler_cxt dummy;
-
- if (rl_catch_signals && signals_set_flag == 1)
- {
- sigemptyset (&dummy.sa_mask);
-
- rl_sigaction (SIGINT, &old_int, &dummy);
- rl_sigaction (SIGTERM, &old_term, &dummy);
- rl_sigaction (SIGHUP, &old_hup, &dummy);
-#if defined (SIGQUIT)
- rl_sigaction (SIGQUIT, &old_quit, &dummy);
-#endif
-#if defined (SIGALRM)
- rl_sigaction (SIGALRM, &old_alrm, &dummy);
-#endif
-
-#if defined (SIGTSTP)
- rl_sigaction (SIGTSTP, &old_tstp, &dummy);
-#endif /* SIGTSTP */
-
-#if defined (SIGTTOU)
- rl_sigaction (SIGTTOU, &old_ttou, &dummy);
-#endif /* SIGTTOU */
-
-#if defined (SIGTTIN)
- rl_sigaction (SIGTTIN, &old_ttin, &dummy);
-#endif /* SIGTTIN */
-
- signals_set_flag = 0;
- }
-
-#if defined (SIGWINCH)
- if (rl_catch_sigwinch && sigwinch_set_flag == 1)
- {
- sigemptyset (&dummy.sa_mask);
- rl_sigaction (SIGWINCH, &old_winch, &dummy);
- sigwinch_set_flag = 0;
- }
-#endif
-
- return 0;
-}
-
-/* Clean up the terminal and readline state after catching a signal, before
- resending it to the calling application. */
-void
-rl_cleanup_after_signal ()
-{
- _rl_clean_up_for_exit ();
- if (rl_deprep_term_function)
- (*rl_deprep_term_function) ();
- rl_clear_pending_input ();
- rl_clear_signals ();
-}
-
-/* Reset the terminal and readline state after a signal handler returns. */
-void
-rl_reset_after_signal ()
-{
- if (rl_prep_term_function)
- (*rl_prep_term_function) (_rl_meta_flag);
- rl_set_signals ();
-}
-
-/* Free up the readline variable line state for the current line (undo list,
- any partial history entry, any keyboard macros in progress, and any
- numeric arguments in process) after catching a signal, before calling
- rl_cleanup_after_signal(). */
-void
-rl_free_line_state ()
-{
- register HIST_ENTRY *entry;
-
- rl_free_undo_list ();
-
- entry = current_history ();
- if (entry)
- entry->data = (char *)NULL;
-
- _rl_kill_kbd_macro ();
- rl_clear_message ();
- _rl_reset_argument ();
-}
-
-#endif /* HANDLE_SIGNALS */
-
-/* **************************************************************** */
-/* */
-/* SIGINT Management */
-/* */
-/* **************************************************************** */
-
-#if defined (HAVE_POSIX_SIGNALS)
-static sigset_t sigint_set, sigint_oset;
-static sigset_t sigwinch_set, sigwinch_oset;
-#else /* !HAVE_POSIX_SIGNALS */
-# if defined (HAVE_BSD_SIGNALS)
-static int sigint_oldmask;
-static int sigwinch_oldmask;
-# endif /* HAVE_BSD_SIGNALS */
-#endif /* !HAVE_POSIX_SIGNALS */
-
-static int sigint_blocked;
-static int sigwinch_blocked;
-
-/* Cause SIGINT to not be delivered until the corresponding call to
- release_sigint(). */
-void
-_rl_block_sigint ()
-{
- if (sigint_blocked)
- return;
-
-#if defined (HAVE_POSIX_SIGNALS)
- sigemptyset (&sigint_set);
- sigemptyset (&sigint_oset);
- sigaddset (&sigint_set, SIGINT);
- sigprocmask (SIG_BLOCK, &sigint_set, &sigint_oset);
-#else /* !HAVE_POSIX_SIGNALS */
-# if defined (HAVE_BSD_SIGNALS)
- sigint_oldmask = sigblock (sigmask (SIGINT));
-# else /* !HAVE_BSD_SIGNALS */
-# if defined (HAVE_USG_SIGHOLD)
- sighold (SIGINT);
-# endif /* HAVE_USG_SIGHOLD */
-# endif /* !HAVE_BSD_SIGNALS */
-#endif /* !HAVE_POSIX_SIGNALS */
-
- sigint_blocked = 1;
-}
-
-/* Allow SIGINT to be delivered. */
-void
-_rl_release_sigint ()
-{
- if (sigint_blocked == 0)
- return;
-
-#if defined (HAVE_POSIX_SIGNALS)
- sigprocmask (SIG_SETMASK, &sigint_oset, (sigset_t *)NULL);
-#else
-# if defined (HAVE_BSD_SIGNALS)
- sigsetmask (sigint_oldmask);
-# else /* !HAVE_BSD_SIGNALS */
-# if defined (HAVE_USG_SIGHOLD)
- sigrelse (SIGINT);
-# endif /* HAVE_USG_SIGHOLD */
-# endif /* !HAVE_BSD_SIGNALS */
-#endif /* !HAVE_POSIX_SIGNALS */
-
- sigint_blocked = 0;
-}
-
-/* Cause SIGWINCH to not be delivered until the corresponding call to
- release_sigwinch(). */
-void
-_rl_block_sigwinch ()
-{
- if (sigwinch_blocked)
- return;
-
-#if defined (HAVE_POSIX_SIGNALS)
- sigemptyset (&sigwinch_set);
- sigemptyset (&sigwinch_oset);
- sigaddset (&sigwinch_set, SIGWINCH);
- sigprocmask (SIG_BLOCK, &sigwinch_set, &sigwinch_oset);
-#else /* !HAVE_POSIX_SIGNALS */
-# if defined (HAVE_BSD_SIGNALS)
- sigwinch_oldmask = sigblock (sigmask (SIGWINCH));
-# else /* !HAVE_BSD_SIGNALS */
-# if defined (HAVE_USG_SIGHOLD)
- sighold (SIGWINCH);
-# endif /* HAVE_USG_SIGHOLD */
-# endif /* !HAVE_BSD_SIGNALS */
-#endif /* !HAVE_POSIX_SIGNALS */
-
- sigwinch_blocked = 1;
-}
-
-/* Allow SIGWINCH to be delivered. */
-void
-_rl_release_sigwinch ()
-{
- if (sigwinch_blocked == 0)
- return;
-
-#if defined (HAVE_POSIX_SIGNALS)
- sigprocmask (SIG_SETMASK, &sigwinch_oset, (sigset_t *)NULL);
-#else
-# if defined (HAVE_BSD_SIGNALS)
- sigsetmask (sigwinch_oldmask);
-# else /* !HAVE_BSD_SIGNALS */
-# if defined (HAVE_USG_SIGHOLD)
- sigrelse (SIGWINCH);
-# endif /* HAVE_USG_SIGHOLD */
-# endif /* !HAVE_BSD_SIGNALS */
-#endif /* !HAVE_POSIX_SIGNALS */
-
- sigwinch_blocked = 0;
-}
-
-/* **************************************************************** */
-/* */
-/* Echoing special control characters */
-/* */
-/* **************************************************************** */
-void
-rl_echo_signal_char (sig)
- int sig;
-{
- char cstr[3];
- int cslen, c;
-
- if (_rl_echoctl == 0 || _rl_echo_control_chars == 0)
- return;
-
- switch (sig)
- {
- case SIGINT: c = _rl_intr_char; break;
-#if defined (SIGQUIT)
- case SIGQUIT: c = _rl_quit_char; break;
-#endif
-#if defined (SIGTSTP)
- case SIGTSTP: c = _rl_susp_char; break;
-#endif
- default: return;
- }
-
- if (CTRL_CHAR (c) || c == RUBOUT)
- {
- cstr[0] = '^';
- cstr[1] = CTRL_CHAR (c) ? UNCTRL (c) : '?';
- cstr[cslen = 2] = '\0';
- }
- else
- {
- cstr[0] = c;
- cstr[cslen = 1] = '\0';
- }
-
- _rl_output_some_chars (cstr, cslen);
-}
+++ /dev/null
-/* terminal.c -- controlling the terminal with termcap. */
-
-/* Copyright (C) 1996-2009 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Readline is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <sys/types.h>
-#include "posixstat.h"
-#include <fcntl.h>
-#if defined (HAVE_SYS_FILE_H)
-# include <sys/file.h>
-#endif /* HAVE_SYS_FILE_H */
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif /* HAVE_STDLIB_H */
-
-#if defined (HAVE_LOCALE_H)
-# include <locale.h>
-#endif
-
-#include <stdio.h>
-
-/* System-specific feature definitions and include files. */
-#include "rldefs.h"
-
-#if defined (GWINSZ_IN_SYS_IOCTL) && !defined (TIOCGWINSZ)
-# include <sys/ioctl.h>
-#endif /* GWINSZ_IN_SYS_IOCTL && !TIOCGWINSZ */
-
-#include "rltty.h"
-#include "tcap.h"
-
-/* Some standard library routines. */
-#include "readline.h"
-#include "history.h"
-
-#include "rlprivate.h"
-#include "rlshell.h"
-#include "xmalloc.h"
-
-#if defined (__MINGW32__)
-# include <windows.h>
-# include <wincon.h>
-
-static void _win_get_screensize PARAMS((int *, int *));
-#endif
-
-#if defined (__EMX__)
-static void _emx_get_screensize PARAMS((int *, int *));
-#endif
-
-#define CUSTOM_REDISPLAY_FUNC() (rl_redisplay_function != rl_redisplay)
-#define CUSTOM_INPUT_FUNC() (rl_getc_function != rl_getc)
-
-/* If the calling application sets this to a non-zero value, readline will
- use the $LINES and $COLUMNS environment variables to set its idea of the
- window size before interrogating the kernel. */
-int rl_prefer_env_winsize = 0;
-
-/* **************************************************************** */
-/* */
-/* Terminal and Termcap */
-/* */
-/* **************************************************************** */
-
-static char *term_buffer = (char *)NULL;
-static char *term_string_buffer = (char *)NULL;
-
-static int tcap_initialized;
-
-#if !defined (__linux__) && !defined (NCURSES_VERSION)
-# if defined (__EMX__) || defined (NEED_EXTERN_PC)
-extern
-# endif /* __EMX__ || NEED_EXTERN_PC */
-char PC, *BC, *UP;
-#endif /* !__linux__ && !NCURSES_VERSION */
-
-/* Some strings to control terminal actions. These are output by tputs (). */
-char *_rl_term_clreol;
-char *_rl_term_clrpag;
-char *_rl_term_cr;
-char *_rl_term_backspace;
-char *_rl_term_goto;
-char *_rl_term_pc;
-
-/* Non-zero if we determine that the terminal can do character insertion. */
-int _rl_terminal_can_insert = 0;
-
-/* How to insert characters. */
-char *_rl_term_im;
-char *_rl_term_ei;
-char *_rl_term_ic;
-char *_rl_term_ip;
-char *_rl_term_IC;
-
-/* How to delete characters. */
-char *_rl_term_dc;
-char *_rl_term_DC;
-
-char *_rl_term_forward_char;
-
-/* How to go up a line. */
-char *_rl_term_up;
-
-/* A visible bell; char if the terminal can be made to flash the screen. */
-static char *_rl_visible_bell;
-
-/* Non-zero means the terminal can auto-wrap lines. */
-int _rl_term_autowrap = -1;
-
-/* Non-zero means that this terminal has a meta key. */
-static int term_has_meta;
-
-/* The sequences to write to turn on and off the meta key, if this
- terminal has one. */
-static char *_rl_term_mm;
-static char *_rl_term_mo;
-
-/* The key sequences output by the arrow keys, if this terminal has any. */
-static char *_rl_term_ku;
-static char *_rl_term_kd;
-static char *_rl_term_kr;
-static char *_rl_term_kl;
-
-/* How to initialize and reset the arrow keys, if this terminal has any. */
-static char *_rl_term_ks;
-static char *_rl_term_ke;
-
-/* The key sequences sent by the Home and End keys, if any. */
-static char *_rl_term_kh;
-static char *_rl_term_kH;
-static char *_rl_term_at7; /* @7 */
-
-/* Delete key */
-static char *_rl_term_kD;
-
-/* Insert key */
-static char *_rl_term_kI;
-
-/* Cursor control */
-static char *_rl_term_vs; /* very visible */
-static char *_rl_term_ve; /* normal */
-
-static void bind_termcap_arrow_keys PARAMS((Keymap));
-
-/* Variables that hold the screen dimensions, used by the display code. */
-int _rl_screenwidth, _rl_screenheight, _rl_screenchars;
-
-/* Non-zero means the user wants to enable the keypad. */
-int _rl_enable_keypad;
-
-/* Non-zero means the user wants to enable a meta key. */
-int _rl_enable_meta = 1;
-
-#if defined (__EMX__)
-static void
-_emx_get_screensize (swp, shp)
- int *swp, *shp;
-{
- int sz[2];
-
- _scrsize (sz);
-
- if (swp)
- *swp = sz[0];
- if (shp)
- *shp = sz[1];
-}
-#endif
-
-#if defined (__MINGW32__)
-static void
-_win_get_screensize (swp, shp)
- int *swp, *shp;
-{
- HANDLE hConOut;
- CONSOLE_SCREEN_BUFFER_INFO scr;
-
- hConOut = GetStdHandle (STD_OUTPUT_HANDLE);
- if (hConOut != INVALID_HANDLE_VALUE)
- {
- if (GetConsoleScreenBufferInfo (hConOut, &scr))
- {
- *swp = scr.dwSize.X;
- *shp = scr.srWindow.Bottom - scr.srWindow.Top + 1;
- }
- }
-}
-#endif
-
-/* Get readline's idea of the screen size. TTY is a file descriptor open
- to the terminal. If IGNORE_ENV is true, we do not pay attention to the
- values of $LINES and $COLUMNS. The tests for TERM_STRING_BUFFER being
- non-null serve to check whether or not we have initialized termcap. */
-void
-_rl_get_screen_size (tty, ignore_env)
- int tty, ignore_env;
-{
- char *ss;
-#if defined (TIOCGWINSZ)
- struct winsize window_size;
-#endif /* TIOCGWINSZ */
- int wr, wc;
-
- wr = wc = -1;
-#if defined (TIOCGWINSZ)
- if (ioctl (tty, TIOCGWINSZ, &window_size) == 0)
- {
- wc = (int) window_size.ws_col;
- wr = (int) window_size.ws_row;
- }
-#endif /* TIOCGWINSZ */
-
-#if defined (__EMX__)
- _emx_get_screensize (&wc, &wr);
-#elif defined (__MINGW32__)
- _win_get_screensize (&wc, &wr);
-#endif
-
- if (ignore_env || rl_prefer_env_winsize == 0)
- {
- _rl_screenwidth = wc;
- _rl_screenheight = wr;
- }
- else
- _rl_screenwidth = _rl_screenheight = -1;
-
- /* Environment variable COLUMNS overrides setting of "co" if IGNORE_ENV
- is unset. If we prefer the environment, check it first before
- assigning the value returned by the kernel. */
- if (_rl_screenwidth <= 0)
- {
- if (ignore_env == 0 && (ss = sh_get_env_value ("COLUMNS")))
- _rl_screenwidth = atoi (ss);
-
- if (_rl_screenwidth <= 0)
- _rl_screenwidth = wc;
-
-#if !defined (__DJGPP__)
- if (_rl_screenwidth <= 0 && term_string_buffer)
- _rl_screenwidth = tgetnum ("co");
-#endif
- }
-
- /* Environment variable LINES overrides setting of "li" if IGNORE_ENV
- is unset. */
- if (_rl_screenheight <= 0)
- {
- if (ignore_env == 0 && (ss = sh_get_env_value ("LINES")))
- _rl_screenheight = atoi (ss);
-
- if (_rl_screenheight <= 0)
- _rl_screenheight = wr;
-
-#if !defined (__DJGPP__)
- if (_rl_screenheight <= 0 && term_string_buffer)
- _rl_screenheight = tgetnum ("li");
-#endif
- }
-
- /* If all else fails, default to 80x24 terminal. */
- if (_rl_screenwidth <= 1)
- _rl_screenwidth = 80;
-
- if (_rl_screenheight <= 0)
- _rl_screenheight = 24;
-
- /* If we're being compiled as part of bash, set the environment
- variables $LINES and $COLUMNS to new values. Otherwise, just
- do a pair of putenv () or setenv () calls. */
- sh_set_lines_and_columns (_rl_screenheight, _rl_screenwidth);
-
- if (_rl_term_autowrap == 0)
- _rl_screenwidth--;
-
- _rl_screenchars = _rl_screenwidth * _rl_screenheight;
-}
-
-void
-_rl_set_screen_size (rows, cols)
- int rows, cols;
-{
- if (_rl_term_autowrap == -1)
- _rl_init_terminal_io (rl_terminal_name);
-
- if (rows > 0)
- _rl_screenheight = rows;
- if (cols > 0)
- {
- _rl_screenwidth = cols;
- if (_rl_term_autowrap == 0)
- _rl_screenwidth--;
- }
-
- if (rows > 0 || cols > 0)
- _rl_screenchars = _rl_screenwidth * _rl_screenheight;
-}
-
-void
-rl_set_screen_size (rows, cols)
- int rows, cols;
-{
- _rl_set_screen_size (rows, cols);
-}
-
-void
-rl_get_screen_size (rows, cols)
- int *rows, *cols;
-{
- if (rows)
- *rows = _rl_screenheight;
- if (cols)
- *cols = _rl_screenwidth;
-}
-
-void
-rl_reset_screen_size ()
-{
- _rl_get_screen_size (fileno (rl_instream), 0);
-}
-
-void
-_rl_sigwinch_resize_terminal ()
-{
- _rl_get_screen_size (fileno (rl_instream), 1);
-}
-
-void
-rl_resize_terminal ()
-{
- _rl_get_screen_size (fileno (rl_instream), 1);
- if (_rl_echoing_p)
- {
- if (CUSTOM_REDISPLAY_FUNC ())
- rl_forced_update_display ();
- else if (RL_ISSTATE(RL_STATE_REDISPLAYING) == 0)
- _rl_redisplay_after_sigwinch ();
- }
-}
-
-struct _tc_string {
- const char * const tc_var;
- char **tc_value;
-};
-
-/* This should be kept sorted, just in case we decide to change the
- search algorithm to something smarter. */
-static const struct _tc_string tc_strings[] =
-{
- { "@7", &_rl_term_at7 },
- { "DC", &_rl_term_DC },
- { "IC", &_rl_term_IC },
- { "ce", &_rl_term_clreol },
- { "cl", &_rl_term_clrpag },
- { "cr", &_rl_term_cr },
- { "dc", &_rl_term_dc },
- { "ei", &_rl_term_ei },
- { "ic", &_rl_term_ic },
- { "im", &_rl_term_im },
- { "kD", &_rl_term_kD }, /* delete */
- { "kH", &_rl_term_kH }, /* home down ?? */
- { "kI", &_rl_term_kI }, /* insert */
- { "kd", &_rl_term_kd },
- { "ke", &_rl_term_ke }, /* end keypad mode */
- { "kh", &_rl_term_kh }, /* home */
- { "kl", &_rl_term_kl },
- { "kr", &_rl_term_kr },
- { "ks", &_rl_term_ks }, /* start keypad mode */
- { "ku", &_rl_term_ku },
- { "le", &_rl_term_backspace },
- { "mm", &_rl_term_mm },
- { "mo", &_rl_term_mo },
- { "nd", &_rl_term_forward_char },
- { "pc", &_rl_term_pc },
- { "up", &_rl_term_up },
- { "vb", &_rl_visible_bell },
- { "vs", &_rl_term_vs },
- { "ve", &_rl_term_ve },
-};
-
-#define NUM_TC_STRINGS (sizeof (tc_strings) / sizeof (struct _tc_string))
-
-/* Read the desired terminal capability strings into BP. The capabilities
- are described in the TC_STRINGS table. */
-static void
-get_term_capabilities (bp)
- char **bp;
-{
-#if !defined (__DJGPP__) /* XXX - doesn't DJGPP have a termcap library? */
- register int i;
-
- for (i = 0; i < NUM_TC_STRINGS; i++)
- *(tc_strings[i].tc_value) = tgetstr ((char *)tc_strings[i].tc_var, bp);
-#endif
- tcap_initialized = 1;
-}
-
-int
-_rl_init_terminal_io (terminal_name)
- const char *terminal_name;
-{
- const char *term;
- char *buffer;
- int tty, tgetent_ret;
-
- term = terminal_name ? terminal_name : sh_get_env_value ("TERM");
- _rl_term_clrpag = _rl_term_cr = _rl_term_clreol = (char *)NULL;
- tty = rl_instream ? fileno (rl_instream) : 0;
-
- if (term == 0)
- term = "dumb";
-
- /* I've separated this out for later work on not calling tgetent at all
- if the calling application has supplied a custom redisplay function,
- (and possibly if the application has supplied a custom input function). */
- if (CUSTOM_REDISPLAY_FUNC())
- {
- tgetent_ret = -1;
- }
- else
- {
- if (term_string_buffer == 0)
- term_string_buffer = (char *)xmalloc(2032);
-
- if (term_buffer == 0)
- term_buffer = (char *)xmalloc(4080);
-
- buffer = term_string_buffer;
-
- tgetent_ret = tgetent (term_buffer, term);
- }
-
- if (tgetent_ret <= 0)
- {
- FREE (term_string_buffer);
- FREE (term_buffer);
- buffer = term_buffer = term_string_buffer = (char *)NULL;
-
- _rl_term_autowrap = 0; /* used by _rl_get_screen_size */
-
- /* Allow calling application to set default height and width, using
- rl_set_screen_size */
- if (_rl_screenwidth <= 0 || _rl_screenheight <= 0)
- {
-#if defined (__EMX__)
- _emx_get_screensize (&_rl_screenwidth, &_rl_screenheight);
- _rl_screenwidth--;
-#else /* !__EMX__ */
- _rl_get_screen_size (tty, 0);
-#endif /* !__EMX__ */
- }
-
- /* Defaults. */
- if (_rl_screenwidth <= 0 || _rl_screenheight <= 0)
- {
- _rl_screenwidth = 79;
- _rl_screenheight = 24;
- }
-
- /* Everything below here is used by the redisplay code (tputs). */
- _rl_screenchars = _rl_screenwidth * _rl_screenheight;
- _rl_term_cr = "\r";
- _rl_term_im = _rl_term_ei = _rl_term_ic = _rl_term_IC = (char *)NULL;
- _rl_term_up = _rl_term_dc = _rl_term_DC = _rl_visible_bell = (char *)NULL;
- _rl_term_ku = _rl_term_kd = _rl_term_kl = _rl_term_kr = (char *)NULL;
- _rl_term_kh = _rl_term_kH = _rl_term_kI = _rl_term_kD = (char *)NULL;
- _rl_term_ks = _rl_term_ke = _rl_term_at7 = (char *)NULL;
- _rl_term_mm = _rl_term_mo = (char *)NULL;
- _rl_term_ve = _rl_term_vs = (char *)NULL;
- _rl_term_forward_char = (char *)NULL;
- _rl_terminal_can_insert = term_has_meta = 0;
-
- /* Reasonable defaults for tgoto(). Readline currently only uses
- tgoto if _rl_term_IC or _rl_term_DC is defined, but just in case we
- change that later... */
- PC = '\0';
- BC = _rl_term_backspace = "\b";
- UP = _rl_term_up;
-
- return 0;
- }
-
- get_term_capabilities (&buffer);
-
- /* Set up the variables that the termcap library expects the application
- to provide. */
- PC = _rl_term_pc ? *_rl_term_pc : 0;
- BC = _rl_term_backspace;
- UP = _rl_term_up;
-
- if (!_rl_term_cr)
- _rl_term_cr = "\r";
-
- _rl_term_autowrap = tgetflag ("am") && tgetflag ("xn");
-
- /* Allow calling application to set default height and width, using
- rl_set_screen_size */
- if (_rl_screenwidth <= 0 || _rl_screenheight <= 0)
- _rl_get_screen_size (tty, 0);
-
- /* "An application program can assume that the terminal can do
- character insertion if *any one of* the capabilities `IC',
- `im', `ic' or `ip' is provided." But we can't do anything if
- only `ip' is provided, so... */
- _rl_terminal_can_insert = (_rl_term_IC || _rl_term_im || _rl_term_ic);
-
- /* Check to see if this terminal has a meta key and clear the capability
- variables if there is none. */
- term_has_meta = tgetflag ("km") != 0;
- if (term_has_meta == 0)
- _rl_term_mm = _rl_term_mo = (char *)NULL;
-
- /* Attempt to find and bind the arrow keys. Do not override already
- bound keys in an overzealous attempt, however. */
-
- bind_termcap_arrow_keys (emacs_standard_keymap);
-
-#if defined (VI_MODE)
- bind_termcap_arrow_keys (vi_movement_keymap);
- bind_termcap_arrow_keys (vi_insertion_keymap);
-#endif /* VI_MODE */
-
- return 0;
-}
-
-/* Bind the arrow key sequences from the termcap description in MAP. */
-static void
-bind_termcap_arrow_keys (map)
- Keymap map;
-{
- Keymap xkeymap;
-
- xkeymap = _rl_keymap;
- _rl_keymap = map;
-
- rl_bind_keyseq_if_unbound (_rl_term_ku, rl_get_previous_history);
- rl_bind_keyseq_if_unbound (_rl_term_kd, rl_get_next_history);
- rl_bind_keyseq_if_unbound (_rl_term_kr, rl_forward_char);
- rl_bind_keyseq_if_unbound (_rl_term_kl, rl_backward_char);
-
- rl_bind_keyseq_if_unbound (_rl_term_kh, rl_beg_of_line); /* Home */
- rl_bind_keyseq_if_unbound (_rl_term_at7, rl_end_of_line); /* End */
-
- rl_bind_keyseq_if_unbound (_rl_term_kD, rl_delete);
-
- _rl_keymap = xkeymap;
-}
-
-char *
-rl_get_termcap (cap)
- const char *cap;
-{
- register int i;
-
- if (tcap_initialized == 0)
- return ((char *)NULL);
- for (i = 0; i < NUM_TC_STRINGS; i++)
- {
- if (tc_strings[i].tc_var[0] == cap[0] && strcmp (tc_strings[i].tc_var, cap) == 0)
- return *(tc_strings[i].tc_value);
- }
- return ((char *)NULL);
-}
-
-/* Re-initialize the terminal considering that the TERM/TERMCAP variable
- has changed. */
-int
-rl_reset_terminal (terminal_name)
- const char *terminal_name;
-{
- _rl_screenwidth = _rl_screenheight = 0;
- _rl_init_terminal_io (terminal_name);
- return 0;
-}
-
-/* A function for the use of tputs () */
-#ifdef _MINIX
-void
-_rl_output_character_function (c)
- int c;
-{
- putc (c, _rl_out_stream);
-}
-#else /* !_MINIX */
-int
-_rl_output_character_function (c)
- int c;
-{
- return putc (c, _rl_out_stream);
-}
-#endif /* !_MINIX */
-
-/* Write COUNT characters from STRING to the output stream. */
-void
-_rl_output_some_chars (string, count)
- const char *string;
- int count;
-{
- fwrite (string, 1, count, _rl_out_stream);
-}
-
-/* Move the cursor back. */
-int
-_rl_backspace (count)
- int count;
-{
- register int i;
-
- if (_rl_term_backspace)
- for (i = 0; i < count; i++)
- tputs (_rl_term_backspace, 1, _rl_output_character_function);
- else
- for (i = 0; i < count; i++)
- putc ('\b', _rl_out_stream);
- return 0;
-}
-
-/* Move to the start of the next line. */
-int
-rl_crlf ()
-{
-#if defined (NEW_TTY_DRIVER) || defined (__MINT__)
- if (_rl_term_cr)
- tputs (_rl_term_cr, 1, _rl_output_character_function);
-#endif /* NEW_TTY_DRIVER || __MINT__ */
- putc ('\n', _rl_out_stream);
- return 0;
-}
-
-/* Ring the terminal bell. */
-int
-rl_ding ()
-{
- if (_rl_echoing_p)
- {
- switch (_rl_bell_preference)
- {
- case NO_BELL:
- default:
- break;
- case VISIBLE_BELL:
- if (_rl_visible_bell)
- {
- tputs (_rl_visible_bell, 1, _rl_output_character_function);
- break;
- }
- /* FALLTHROUGH */
- case AUDIBLE_BELL:
- fprintf (stderr, "\007");
- fflush (stderr);
- break;
- }
- return (0);
- }
- return (-1);
-}
-
-/* **************************************************************** */
-/* */
-/* Controlling the Meta Key and Keypad */
-/* */
-/* **************************************************************** */
-
-void
-_rl_enable_meta_key ()
-{
-#if !defined (__DJGPP__)
- if (term_has_meta && _rl_term_mm)
- tputs (_rl_term_mm, 1, _rl_output_character_function);
-#endif
-}
-
-void
-_rl_control_keypad (on)
- int on;
-{
-#if !defined (__DJGPP__)
- if (on && _rl_term_ks)
- tputs (_rl_term_ks, 1, _rl_output_character_function);
- else if (!on && _rl_term_ke)
- tputs (_rl_term_ke, 1, _rl_output_character_function);
-#endif
-}
-
-/* **************************************************************** */
-/* */
-/* Controlling the Cursor */
-/* */
-/* **************************************************************** */
-
-/* Set the cursor appropriately depending on IM, which is one of the
- insert modes (insert or overwrite). Insert mode gets the normal
- cursor. Overwrite mode gets a very visible cursor. Only does
- anything if we have both capabilities. */
-void
-_rl_set_cursor (im, force)
- int im, force;
-{
- if (_rl_term_ve && _rl_term_vs)
- {
- if (force || im != rl_insert_mode)
- {
- if (im == RL_IM_OVERWRITE)
- tputs (_rl_term_vs, 1, _rl_output_character_function);
- else
- tputs (_rl_term_ve, 1, _rl_output_character_function);
- }
- }
-}
+++ /dev/null
-/* locale.c - Miscellaneous internationalization functions. */
-
-/* Copyright (C) 1996-2009 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#include "bashtypes.h"
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#if HAVE_LANGINFO_CODESET
-# include <langinfo.h>
-#endif
-
-#include "bashintl.h"
-#include "bashansi.h"
-#include <stdio.h>
-#include "chartypes.h"
-#include <errno.h>
-
-#include "shell.h"
-#include "input.h" /* For bash_input */
-
-#ifndef errno
-extern int errno;
-#endif
-
-int locale_utf8locale; /* unused for now */
-int locale_mb_cur_max; /* value of MB_CUR_MAX for current locale (LC_CTYPE) */
-
-extern int dump_translatable_strings, dump_po_strings;
-
-/* The current locale when the program begins */
-static char *default_locale;
-
-/* The current domain for textdomain(3). */
-static char *default_domain;
-static char *default_dir;
-
-/* tracks the value of LC_ALL; used to override values for other locale
- categories */
-static char *lc_all;
-
-/* tracks the value of LC_ALL; used to provide defaults for locale
- categories */
-static char *lang;
-
-/* Called to reset all of the locale variables to their appropriate values
- if (and only if) LC_ALL has not been assigned a value. */
-static int reset_locale_vars __P((void));
-
-static void locale_setblanks __P((void));
-static int locale_isutf8 __P((char *));
-
-/* Set the value of default_locale and make the current locale the
- system default locale. This should be called very early in main(). */
-void
-set_default_locale ()
-{
-#if defined (HAVE_SETLOCALE)
- default_locale = setlocale (LC_ALL, "");
- if (default_locale)
- default_locale = savestring (default_locale);
-#endif /* HAVE_SETLOCALE */
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
-
- locale_mb_cur_max = MB_CUR_MAX;
-itrace("set_default_locale: locale_mb_cur_max -> %d", locale_mb_cur_max);
-}
-
-/* Set default values for LC_CTYPE, LC_COLLATE, LC_MESSAGES, LC_NUMERIC and
- LC_TIME if they are not specified in the environment, but LC_ALL is. This
- should be called from main() after parsing the environment. */
-void
-set_default_locale_vars ()
-{
- char *val;
-
-#if defined (HAVE_SETLOCALE)
-
-# if defined (LC_CTYPE)
- val = get_string_value ("LC_CTYPE");
- if (val == 0 && lc_all && *lc_all)
- {
- setlocale (LC_CTYPE, lc_all);
- locale_setblanks ();
- locale_mb_cur_max = MB_CUR_MAX;
-itrace("set_default_locale_vars: locale_mb_cur_max -> %d", locale_mb_cur_max);
- }
-# endif
-
-# if defined (LC_COLLATE)
- val = get_string_value ("LC_COLLATE");
- if (val == 0 && lc_all && *lc_all)
- setlocale (LC_COLLATE, lc_all);
-# endif /* LC_COLLATE */
-
-# if defined (LC_MESSAGES)
- val = get_string_value ("LC_MESSAGES");
- if (val == 0 && lc_all && *lc_all)
- setlocale (LC_MESSAGES, lc_all);
-# endif /* LC_MESSAGES */
-
-# if defined (LC_NUMERIC)
- val = get_string_value ("LC_NUMERIC");
- if (val == 0 && lc_all && *lc_all)
- setlocale (LC_NUMERIC, lc_all);
-# endif /* LC_NUMERIC */
-
-# if defined (LC_TIME)
- val = get_string_value ("LC_TIME");
- if (val == 0 && lc_all && *lc_all)
- setlocale (LC_TIME, lc_all);
-# endif /* LC_TIME */
-
-#endif /* HAVE_SETLOCALE */
-
- val = get_string_value ("TEXTDOMAIN");
- if (val && *val)
- {
- FREE (default_domain);
- default_domain = savestring (val);
-#if 0
- /* Don't want to override the shell's textdomain as the default */
- textdomain (default_domain);
-#endif
- }
-
- val = get_string_value ("TEXTDOMAINDIR");
- if (val && *val)
- {
- FREE (default_dir);
- default_dir = savestring (val);
- if (default_domain && *default_domain)
- bindtextdomain (default_domain, default_dir);
- }
-}
-
-/* Set one of the locale categories (specified by VAR) to VALUE. Returns 1
- if successful, 0 otherwise. */
-int
-set_locale_var (var, value)
- char *var, *value;
-{
- int r;
- char *x;
-
- x = "";
- errno = 0;
- if (var[0] == 'T' && var[10] == 0) /* TEXTDOMAIN */
- {
- FREE (default_domain);
- default_domain = value ? savestring (value) : (char *)NULL;
-#if 0
- /* Don't want to override the shell's textdomain as the default */
- textdomain (default_domain);
-#endif
- return (1);
- }
- else if (var[0] == 'T') /* TEXTDOMAINDIR */
- {
- FREE (default_dir);
- default_dir = value ? savestring (value) : (char *)NULL;
- if (default_domain && *default_domain)
- bindtextdomain (default_domain, default_dir);
- return (1);
- }
-
- /* var[0] == 'L' && var[1] == 'C' && var[2] == '_' */
-
- else if (var[3] == 'A') /* LC_ALL */
- {
- FREE (lc_all);
- if (value)
- lc_all = savestring (value);
- else
- {
- lc_all = (char *)xmalloc (1);
- lc_all[0] = '\0';
- }
-#if defined (HAVE_SETLOCALE)
- r = *lc_all ? ((x = setlocale (LC_ALL, lc_all)) != 0) : reset_locale_vars ();
- if (x == 0)
- {
- if (errno == 0)
- internal_warning(_("setlocale: LC_ALL: cannot change locale (%s)"), lc_all);
- else
- internal_warning(_("setlocale: LC_ALL: cannot change locale (%s): %s"), lc_all, strerror (errno));
- }
- locale_setblanks ();
- locale_mb_cur_max = MB_CUR_MAX;
-itrace("set_locale_var: locale_mb_cur_max -> %d", locale_mb_cur_max);
- return r;
-#else
- return (1);
-#endif
- }
-
-#if defined (HAVE_SETLOCALE)
- else if (var[3] == 'C' && var[4] == 'T') /* LC_CTYPE */
- {
-# if defined (LC_CTYPE)
- if (lc_all == 0 || *lc_all == '\0')
- {
- x = setlocale (LC_CTYPE, get_locale_var ("LC_CTYPE"));
- locale_setblanks ();
- locale_mb_cur_max = MB_CUR_MAX;
-itrace("set_locale_var: locale_mb_cur_max -> %d", locale_mb_cur_max);
- }
-# endif
- }
- else if (var[3] == 'C' && var[4] == 'O') /* LC_COLLATE */
- {
-# if defined (LC_COLLATE)
- if (lc_all == 0 || *lc_all == '\0')
- x = setlocale (LC_COLLATE, get_locale_var ("LC_COLLATE"));
-# endif /* LC_COLLATE */
- }
- else if (var[3] == 'M' && var[4] == 'E') /* LC_MESSAGES */
- {
-# if defined (LC_MESSAGES)
- if (lc_all == 0 || *lc_all == '\0')
- x = setlocale (LC_MESSAGES, get_locale_var ("LC_MESSAGES"));
-# endif /* LC_MESSAGES */
- }
- else if (var[3] == 'N' && var[4] == 'U') /* LC_NUMERIC */
- {
-# if defined (LC_NUMERIC)
- if (lc_all == 0 || *lc_all == '\0')
- x = setlocale (LC_NUMERIC, get_locale_var ("LC_NUMERIC"));
-# endif /* LC_NUMERIC */
- }
- else if (var[3] == 'T' && var[4] == 'I') /* LC_TIME */
- {
-# if defined (LC_TIME)
- if (lc_all == 0 || *lc_all == '\0')
- x = setlocale (LC_TIME, get_locale_var ("LC_TIME"));
-# endif /* LC_TIME */
- }
-#endif /* HAVE_SETLOCALE */
-
- if (x == 0)
- {
- if (errno == 0)
- internal_warning(_("setlocale: %s: cannot change locale (%s)"), var, get_locale_var (var));
- else
- internal_warning(_("setlocale: %s: cannot change locale (%s): %s"), var, get_locale_var (var), strerror (errno));
- }
-
- return (x != 0);
-}
-
-/* Called when LANG is assigned a value. Tracks value in `lang'. Calls
- reset_locale_vars() to reset any default values if LC_ALL is unset or
- null. */
-int
-set_lang (var, value)
- char *var, *value;
-{
- FREE (lang);
- if (value)
- lang = savestring (value);
- else
- {
- lang = (char *)xmalloc (1);
- lang[0] = '\0';
- }
-
- return ((lc_all == 0 || *lc_all == 0) ? reset_locale_vars () : 0);
-}
-
-/* Set default values for LANG and LC_ALL. Default values for all other
- locale-related variables depend on these. */
-void
-set_default_lang ()
-{
- char *v;
-
- v = get_string_value ("LC_ALL");
- set_locale_var ("LC_ALL", v);
-
- v = get_string_value ("LANG");
- set_lang ("LANG", v);
-}
-
-/* Get the value of one of the locale variables (LC_MESSAGES, LC_CTYPE).
- The precedence is as POSIX.2 specifies: LC_ALL has precedence over
- the specific locale variables, and LANG, if set, is used as the default. */
-char *
-get_locale_var (var)
- char *var;
-{
- char *locale;
-
- locale = lc_all;
-
- if (locale == 0 || *locale == 0)
- locale = get_string_value (var); /* XXX - mem leak? */
- if (locale == 0 || *locale == 0)
- locale = lang;
- if (locale == 0 || *locale == 0)
-#if 0
- locale = default_locale; /* system-dependent; not really portable. should it be "C"? */
-#else
- locale = "";
-#endif
- return (locale);
-}
-
-/* Called to reset all of the locale variables to their appropriate values
- if (and only if) LC_ALL has not been assigned a value. DO NOT CALL THIS
- IF LC_ALL HAS BEEN ASSIGNED A VALUE. */
-static int
-reset_locale_vars ()
-{
- char *t;
-#if defined (HAVE_SETLOCALE)
- if (lang == 0 || *lang == '\0')
- maybe_make_export_env (); /* trust that this will change environment for setlocale */
- if (setlocale (LC_ALL, lang ? lang : "") == 0)
- return 0;
-
-# if defined (LC_CTYPE)
- t = setlocale (LC_CTYPE, get_locale_var ("LC_CTYPE"));
-# endif
-# if defined (LC_COLLATE)
- t = setlocale (LC_COLLATE, get_locale_var ("LC_COLLATE"));
-# endif
-# if defined (LC_MESSAGES)
- t = setlocale (LC_MESSAGES, get_locale_var ("LC_MESSAGES"));
-# endif
-# if defined (LC_NUMERIC)
- t = setlocale (LC_NUMERIC, get_locale_var ("LC_NUMERIC"));
-# endif
-# if defined (LC_TIME)
- t = setlocale (LC_TIME, get_locale_var ("LC_TIME"));
-# endif
-
- locale_setblanks ();
- locale_mb_cur_max = MB_CUR_MAX;
-itrace("reset_locale_vars: locale_mb_cur_max -> %d", locale_mb_cur_max);
-
-#endif
- return 1;
-}
-
-/* Translate the contents of STRING, a $"..." quoted string, according
- to the current locale. In the `C' or `POSIX' locale, or if gettext()
- is not available, the passed string is returned unchanged. The
- length of the translated string is returned in LENP, if non-null. */
-char *
-localetrans (string, len, lenp)
- char *string;
- int len, *lenp;
-{
- char *locale, *t;
- char *translated;
- int tlen;
-
- /* Don't try to translate null strings. */
- if (string == 0 || *string == 0)
- {
- if (lenp)
- *lenp = 0;
- return ((char *)NULL);
- }
-
- locale = get_locale_var ("LC_MESSAGES");
-
- /* If we don't have setlocale() or the current locale is `C' or `POSIX',
- just return the string. If we don't have gettext(), there's no use
- doing anything else. */
- if (locale == 0 || locale[0] == '\0' ||
- (locale[0] == 'C' && locale[1] == '\0') || STREQ (locale, "POSIX"))
- {
- t = (char *)xmalloc (len + 1);
- strcpy (t, string);
- if (lenp)
- *lenp = len;
- return (t);
- }
-
- /* Now try to translate it. */
- if (default_domain && *default_domain)
- translated = dgettext (default_domain, string);
- else
- translated = string;
-
- if (translated == string) /* gettext returns its argument if untranslatable */
- {
- t = (char *)xmalloc (len + 1);
- strcpy (t, string);
- if (lenp)
- *lenp = len;
- }
- else
- {
- tlen = strlen (translated);
- t = (char *)xmalloc (tlen + 1);
- strcpy (t, translated);
- if (lenp)
- *lenp = tlen;
- }
- return (t);
-}
-
-/* Change a bash string into a string suitable for inclusion in a `po' file.
- This backslash-escapes `"' and `\' and changes newlines into \\\n"\n". */
-char *
-mk_msgstr (string, foundnlp)
- char *string;
- int *foundnlp;
-{
- register int c, len;
- char *result, *r, *s;
-
- for (len = 0, s = string; s && *s; s++)
- {
- len++;
- if (*s == '"' || *s == '\\')
- len++;
- else if (*s == '\n')
- len += 5;
- }
-
- r = result = (char *)xmalloc (len + 3);
- *r++ = '"';
-
- for (s = string; s && (c = *s); s++)
- {
- if (c == '\n') /* <NL> -> \n"<NL>" */
- {
- *r++ = '\\';
- *r++ = 'n';
- *r++ = '"';
- *r++ = '\n';
- *r++ = '"';
- if (foundnlp)
- *foundnlp = 1;
- continue;
- }
- if (c == '"' || c == '\\')
- *r++ = '\\';
- *r++ = c;
- }
-
- *r++ = '"';
- *r++ = '\0';
-
- return result;
-}
-
-/* $"..." -- Translate the portion of STRING between START and END
- according to current locale using gettext (if available) and return
- the result. The caller will take care of leaving the quotes intact.
- The string will be left without the leading `$' by the caller.
- If translation is performed, the translated string will be double-quoted
- by the caller. The length of the translated string is returned in LENP,
- if non-null. */
-char *
-localeexpand (string, start, end, lineno, lenp)
- char *string;
- int start, end, lineno, *lenp;
-{
- int len, tlen, foundnl;
- char *temp, *t, *t2;
-
- temp = (char *)xmalloc (end - start + 1);
- for (tlen = 0, len = start; len < end; )
- temp[tlen++] = string[len++];
- temp[tlen] = '\0';
-
- /* If we're just dumping translatable strings, don't do anything with the
- string itself, but if we're dumping in `po' file format, convert it into
- a form more palatable to gettext(3) and friends by quoting `"' and `\'
- with backslashes and converting <NL> into `\n"<NL>"'. If we find a
- newline in TEMP, we first output a `msgid ""' line and then the
- translated string; otherwise we output the `msgid' and translated
- string all on one line. */
- if (dump_translatable_strings)
- {
- if (dump_po_strings)
- {
- foundnl = 0;
- t = mk_msgstr (temp, &foundnl);
- t2 = foundnl ? "\"\"\n" : "";
-
- printf ("#: %s:%d\nmsgid %s%s\nmsgstr \"\"\n",
- yy_input_name (), lineno, t2, t);
- free (t);
- }
- else
- printf ("\"%s\"\n", temp);
-
- if (lenp)
- *lenp = tlen;
- return (temp);
- }
- else if (*temp)
- {
- t = localetrans (temp, tlen, &len);
- free (temp);
- if (lenp)
- *lenp = len;
- return (t);
- }
- else
- {
- if (lenp)
- *lenp = 0;
- return (temp);
- }
-}
-
-/* Set every character in the <blank> character class to be a shell break
- character for the lexical analyzer when the locale changes. */
-static void
-locale_setblanks ()
-{
- int x;
-
- for (x = 0; x < sh_syntabsiz; x++)
- {
- if (isblank (x))
- sh_syntaxtab[x] |= CSHBRK|CBLANK;
- else if (member (x, shell_break_chars))
- {
- sh_syntaxtab[x] |= CSHBRK;
- sh_syntaxtab[x] &= ~CBLANK;
- }
- else
- sh_syntaxtab[x] &= ~(CSHBRK|CBLANK);
- }
-}
-
-static int
-locale_isutf8 (lspec)
- char *lspec;
-{
- char *cp;
-
-#if HAVE_LANGINFO_CODESET
- cp = nl_langinfo (CODESET);
- return (STREQ (cp, "UTF-8") || STREQ (cp, "utf8"));
-#else
- /* Take a shot */
- return (strstr (lspec, "UTF-8") || strstr (lspec, "utf8"));
-#endif
-}
+++ /dev/null
-/* nojobs.c - functions that make children, remember them, and handle their termination. */
-
-/* This file works under BSD, System V, minix, and Posix systems. It does
- not implement job control. */
-
-/* Copyright (C) 1987-2009 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#include "bashtypes.h"
-#include "filecntl.h"
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include <stdio.h>
-#include <signal.h>
-#include <errno.h>
-
-#if defined (BUFFERED_INPUT)
-# include "input.h"
-#endif
-
-/* Need to include this up here for *_TTY_DRIVER definitions. */
-#include "shtty.h"
-
-#include "bashintl.h"
-
-#include "shell.h"
-#include "jobs.h"
-#include "execute_cmd.h"
-
-#include "builtins/builtext.h" /* for wait_builtin */
-
-#define DEFAULT_CHILD_MAX 32
-
-#if defined (_POSIX_VERSION) || !defined (HAVE_KILLPG)
-# define killpg(pg, sig) kill(-(pg),(sig))
-#endif /* USG || _POSIX_VERSION */
-
-#if !defined (HAVE_SIGINTERRUPT) && !defined (HAVE_POSIX_SIGNALS)
-# define siginterrupt(sig, code)
-#endif /* !HAVE_SIGINTERRUPT && !HAVE_POSIX_SIGNALS */
-
-#if defined (HAVE_WAITPID)
-# define WAITPID(pid, statusp, options) waitpid (pid, statusp, options)
-#else
-# define WAITPID(pid, statusp, options) wait (statusp)
-#endif /* !HAVE_WAITPID */
-
-/* Return the fd from which we are actually getting input. */
-#define input_tty() (shell_tty != -1) ? shell_tty : fileno (stderr)
-
-#if !defined (errno)
-extern int errno;
-#endif /* !errno */
-
-extern int interactive, interactive_shell, login_shell;
-extern int subshell_environment;
-extern int last_command_exit_value, last_command_exit_signal;
-extern int interrupt_immediately;
-extern sh_builtin_func_t *this_shell_builtin;
-#if defined (HAVE_POSIX_SIGNALS)
-extern sigset_t top_level_mask;
-#endif
-extern procenv_t wait_intr_buf;
-extern int wait_signal_received;
-
-pid_t last_made_pid = NO_PID;
-pid_t last_asynchronous_pid = NO_PID;
-
-/* Call this when you start making children. */
-int already_making_children = 0;
-
-/* The controlling tty for this shell. */
-int shell_tty = -1;
-
-/* If this is non-zero, $LINES and $COLUMNS are reset after every process
- exits from get_tty_state(). */
-int check_window_size;
-
-/* STATUS and FLAGS are only valid if pid != NO_PID
- STATUS is only valid if (flags & PROC_RUNNING) == 0 */
-struct proc_status {
- pid_t pid;
- int status; /* Exit status of PID or 128 + fatal signal number */
- int flags;
-};
-
-/* Values for proc_status.flags */
-#define PROC_RUNNING 0x01
-#define PROC_NOTIFIED 0x02
-#define PROC_ASYNC 0x04
-#define PROC_SIGNALED 0x10
-
-/* Return values from find_status_by_pid */
-#define PROC_BAD -1
-#define PROC_STILL_ALIVE -2
-
-static struct proc_status *pid_list = (struct proc_status *)NULL;
-static int pid_list_size;
-static int wait_sigint_received;
-
-static long child_max = -1L;
-
-static void alloc_pid_list __P((void));
-static int find_proc_slot __P((void));
-static int find_index_by_pid __P((pid_t));
-static int find_status_by_pid __P((pid_t));
-static int process_exit_status __P((WAIT));
-static int find_termsig_by_pid __P((pid_t));
-static int get_termsig __P((WAIT));
-static void set_pid_status __P((pid_t, WAIT));
-static void set_pid_flags __P((pid_t, int));
-static void unset_pid_flags __P((pid_t, int));
-static int get_pid_flags __P((pid_t));
-static void add_pid __P((pid_t, int));
-static void mark_dead_jobs_as_notified __P((int));
-
-static sighandler wait_sigint_handler __P((int));
-static char *j_strsignal __P((int));
-
-#if defined (HAVE_WAITPID)
-static void reap_zombie_children __P((void));
-#endif
-
-#if !defined (HAVE_SIGINTERRUPT) && defined (HAVE_POSIX_SIGNALS)
-static int siginterrupt __P((int, int));
-#endif
-
-static void restore_sigint_handler __P((void));
-
-/* Allocate new, or grow existing PID_LIST. */
-static void
-alloc_pid_list ()
-{
- register int i;
- int old = pid_list_size;
-
- pid_list_size += 10;
- pid_list = (struct proc_status *)xrealloc (pid_list, pid_list_size * sizeof (struct proc_status));
-
- /* None of the newly allocated slots have process id's yet. */
- for (i = old; i < pid_list_size; i++)
- pid_list[i].pid = NO_PID;
-}
-
-/* Return the offset within the PID_LIST array of an empty slot. This can
- create new slots if all of the existing slots are taken. */
-static int
-find_proc_slot ()
-{
- register int i;
-
- for (i = 0; i < pid_list_size; i++)
- if (pid_list[i].pid == NO_PID)
- return (i);
-
- if (i == pid_list_size)
- alloc_pid_list ();
-
- return (i);
-}
-
-/* Return the offset within the PID_LIST array of a slot containing PID,
- or the value NO_PID if the pid wasn't found. */
-static int
-find_index_by_pid (pid)
- pid_t pid;
-{
- register int i;
-
- for (i = 0; i < pid_list_size; i++)
- if (pid_list[i].pid == pid)
- return (i);
-
- return (NO_PID);
-}
-
-/* Return the status of PID as looked up in the PID_LIST array. A
- return value of PROC_BAD indicates that PID wasn't found. */
-static int
-find_status_by_pid (pid)
- pid_t pid;
-{
- int i;
-
- i = find_index_by_pid (pid);
- if (i == NO_PID)
- return (PROC_BAD);
- if (pid_list[i].flags & PROC_RUNNING)
- return (PROC_STILL_ALIVE);
- return (pid_list[i].status);
-}
-
-static int
-process_exit_status (status)
- WAIT status;
-{
- if (WIFSIGNALED (status))
- return (128 + WTERMSIG (status));
- else
- return (WEXITSTATUS (status));
-}
-
-/* Return the status of PID as looked up in the PID_LIST array. A
- return value of PROC_BAD indicates that PID wasn't found. */
-static int
-find_termsig_by_pid (pid)
- pid_t pid;
-{
- int i;
-
- i = find_index_by_pid (pid);
- if (i == NO_PID)
- return (0);
- if (pid_list[i].flags & PROC_RUNNING)
- return (0);
- return (get_termsig ((WAIT)pid_list[i].status));
-}
-
-/* Set LAST_COMMAND_EXIT_SIGNAL depending on STATUS. If STATUS is -1, look
- up PID in the pid array and set LAST_COMMAND_EXIT_SIGNAL appropriately
- depending on its flags and exit status. */
-static int
-get_termsig (status)
- WAIT status;
-{
- if (WIFSTOPPED (status) == 0 && WIFSIGNALED (status))
- return (WTERMSIG (status));
- else
- return (0);
-}
-
-/* Give PID the status value STATUS in the PID_LIST array. */
-static void
-set_pid_status (pid, status)
- pid_t pid;
- WAIT status;
-{
- int slot;
-
-#if defined (COPROCESS_SUPPORT)
- coproc_pidchk (pid, status);
-#endif
-
- slot = find_index_by_pid (pid);
- if (slot == NO_PID)
- return;
-
- pid_list[slot].status = process_exit_status (status);
- pid_list[slot].flags &= ~PROC_RUNNING;
- if (WIFSIGNALED (status))
- pid_list[slot].flags |= PROC_SIGNALED;
- /* If it's not a background process, mark it as notified so it gets
- cleaned up. */
- if ((pid_list[slot].flags & PROC_ASYNC) == 0)
- pid_list[slot].flags |= PROC_NOTIFIED;
-}
-
-/* Give PID the flags FLAGS in the PID_LIST array. */
-static void
-set_pid_flags (pid, flags)
- pid_t pid;
- int flags;
-{
- int slot;
-
- slot = find_index_by_pid (pid);
- if (slot == NO_PID)
- return;
-
- pid_list[slot].flags |= flags;
-}
-
-/* Unset FLAGS for PID in the pid list */
-static void
-unset_pid_flags (pid, flags)
- pid_t pid;
- int flags;
-{
- int slot;
-
- slot = find_index_by_pid (pid);
- if (slot == NO_PID)
- return;
-
- pid_list[slot].flags &= ~flags;
-}
-
-/* Return the flags corresponding to PID in the PID_LIST array. */
-static int
-get_pid_flags (pid)
- pid_t pid;
-{
- int slot;
-
- slot = find_index_by_pid (pid);
- if (slot == NO_PID)
- return 0;
-
- return (pid_list[slot].flags);
-}
-
-static void
-add_pid (pid, async)
- pid_t pid;
- int async;
-{
- int slot;
-
- slot = find_proc_slot ();
-
- pid_list[slot].pid = pid;
- pid_list[slot].status = -1;
- pid_list[slot].flags = PROC_RUNNING;
- if (async)
- pid_list[slot].flags |= PROC_ASYNC;
-}
-
-static void
-mark_dead_jobs_as_notified (force)
- int force;
-{
- register int i, ndead;
-
- /* first, count the number of non-running async jobs if FORCE == 0 */
- for (i = ndead = 0; force == 0 && i < pid_list_size; i++)
- {
- if (pid_list[i].pid == NO_PID)
- continue;
- if (((pid_list[i].flags & PROC_RUNNING) == 0) &&
- (pid_list[i].flags & PROC_ASYNC))
- ndead++;
- }
-
- if (child_max < 0)
- child_max = getmaxchild ();
- if (child_max < 0)
- child_max = DEFAULT_CHILD_MAX;
-
- if (force == 0 && ndead <= child_max)
- return;
-
- /* If FORCE == 0, we just mark as many non-running async jobs as notified
- to bring us under the CHILD_MAX limit. */
- for (i = 0; i < pid_list_size; i++)
- {
- if (pid_list[i].pid == NO_PID)
- continue;
- if (((pid_list[i].flags & PROC_RUNNING) == 0) &&
- pid_list[i].pid != last_asynchronous_pid)
- {
- pid_list[i].flags |= PROC_NOTIFIED;
- if (force == 0 && (pid_list[i].flags & PROC_ASYNC) && --ndead <= child_max)
- break;
- }
- }
-}
-
-/* Remove all dead, notified jobs from the pid_list. */
-int
-cleanup_dead_jobs ()
-{
- register int i;
-
-#if defined (HAVE_WAITPID)
- reap_zombie_children ();
-#endif
-
- for (i = 0; i < pid_list_size; i++)
- {
- if ((pid_list[i].flags & PROC_RUNNING) == 0 &&
- (pid_list[i].flags & PROC_NOTIFIED))
- pid_list[i].pid = NO_PID;
- }
-
-#if defined (COPROCESS_SUPPORT)
- coproc_reap ();
-#endif
-
- return 0;
-}
-
-void
-reap_dead_jobs ()
-{
- mark_dead_jobs_as_notified (0);
- cleanup_dead_jobs ();
-}
-
-/* Initialize the job control mechanism, and set up the tty stuff. */
-initialize_job_control (force)
- int force;
-{
- shell_tty = fileno (stderr);
-
- if (interactive)
- get_tty_state ();
-}
-
-/* Setup this shell to handle C-C, etc. */
-void
-initialize_job_signals ()
-{
- set_signal_handler (SIGINT, sigint_sighandler);
-
- /* If this is a login shell we don't wish to be disturbed by
- stop signals. */
- if (login_shell)
- ignore_tty_job_signals ();
-}
-
-#if defined (HAVE_WAITPID)
-/* Collect the status of all zombie children so that their system
- resources can be deallocated. */
-static void
-reap_zombie_children ()
-{
-# if defined (WNOHANG)
- pid_t pid;
- WAIT status;
-
- CHECK_TERMSIG;
- while ((pid = waitpid (-1, (int *)&status, WNOHANG)) > 0)
- set_pid_status (pid, status);
-# endif /* WNOHANG */
- CHECK_TERMSIG;
-}
-#endif /* WAITPID */
-
-#if !defined (HAVE_SIGINTERRUPT) && defined (HAVE_POSIX_SIGNALS)
-static int
-siginterrupt (sig, flag)
- int sig, flag;
-{
- struct sigaction act;
-
- sigaction (sig, (struct sigaction *)NULL, &act);
-
- if (flag)
- act.sa_flags &= ~SA_RESTART;
- else
- act.sa_flags |= SA_RESTART;
-
- return (sigaction (sig, &act, (struct sigaction *)NULL));
-}
-#endif /* !HAVE_SIGINTERRUPT && HAVE_POSIX_SIGNALS */
-
-/* Fork, handling errors. Returns the pid of the newly made child, or 0.
- COMMAND is just for remembering the name of the command; we don't do
- anything else with it. ASYNC_P says what to do with the tty. If
- non-zero, then don't give it away. */
-pid_t
-make_child (command, async_p)
- char *command;
- int async_p;
-{
- pid_t pid;
- int forksleep;
-
- /* Discard saved memory. */
- if (command)
- free (command);
-
- start_pipeline ();
-
-#if defined (BUFFERED_INPUT)
- /* If default_buffered_input is active, we are reading a script. If
- the command is asynchronous, we have already duplicated /dev/null
- as fd 0, but have not changed the buffered stream corresponding to
- the old fd 0. We don't want to sync the stream in this case. */
- if (default_buffered_input != -1 && (!async_p || default_buffered_input > 0))
- sync_buffered_stream (default_buffered_input);
-#endif /* BUFFERED_INPUT */
-
- /* Create the child, handle severe errors. Retry on EAGAIN. */
- forksleep = 1;
- while ((pid = fork ()) < 0 && errno == EAGAIN && forksleep < FORKSLEEP_MAX)
- {
- sys_error ("fork: retry");
-#if defined (HAVE_WAITPID)
- /* Posix systems with a non-blocking waitpid () system call available
- get another chance after zombies are reaped. */
- reap_zombie_children ();
- if (forksleep > 1 && sleep (forksleep) != 0)
- break;
-#else
- if (sleep (forksleep) != 0)
- break;
-#endif /* HAVE_WAITPID */
- forksleep <<= 1;
- }
-
- if (pid < 0)
- {
- sys_error ("fork");
- throw_to_top_level ();
- }
-
- if (pid == 0)
- {
-#if defined (BUFFERED_INPUT)
- unset_bash_input (0);
-#endif /* BUFFERED_INPUT */
-
-#if defined (HAVE_POSIX_SIGNALS)
- /* Restore top-level signal mask. */
- sigprocmask (SIG_SETMASK, &top_level_mask, (sigset_t *)NULL);
-#endif
-
-#if 0
- /* Ignore INT and QUIT in asynchronous children. */
- if (async_p)
- last_asynchronous_pid = getpid ();
-#endif
-
- default_tty_job_signals ();
- }
- else
- {
- /* In the parent. */
-
- last_made_pid = pid;
-
- if (async_p)
- last_asynchronous_pid = pid;
-
- add_pid (pid, async_p);
- }
- return (pid);
-}
-
-void
-ignore_tty_job_signals ()
-{
-#if defined (SIGTSTP)
- set_signal_handler (SIGTSTP, SIG_IGN);
- set_signal_handler (SIGTTIN, SIG_IGN);
- set_signal_handler (SIGTTOU, SIG_IGN);
-#endif
-}
-
-void
-default_tty_job_signals ()
-{
-#if defined (SIGTSTP)
- set_signal_handler (SIGTSTP, SIG_DFL);
- set_signal_handler (SIGTTIN, SIG_DFL);
- set_signal_handler (SIGTTOU, SIG_DFL);
-#endif
-}
-
-/* Wait for a single pid (PID) and return its exit status. Called by
- the wait builtin. */
-int
-wait_for_single_pid (pid)
- pid_t pid;
-{
- pid_t got_pid;
- WAIT status;
- int pstatus, flags;
-
- pstatus = find_status_by_pid (pid);
-
- if (pstatus == PROC_BAD)
- {
- internal_error (_("wait: pid %ld is not a child of this shell"), (long)pid);
- return (127);
- }
-
- if (pstatus != PROC_STILL_ALIVE)
- {
- if (pstatus > 128)
- last_command_exit_signal = find_termsig_by_pid (pid);
- return (pstatus);
- }
-
- siginterrupt (SIGINT, 1);
- while ((got_pid = WAITPID (pid, &status, 0)) != pid)
- {
- CHECK_TERMSIG;
- if (got_pid < 0)
- {
- if (errno != EINTR && errno != ECHILD)
- {
- siginterrupt (SIGINT, 0);
- sys_error ("wait");
- }
- break;
- }
- else if (got_pid > 0)
- set_pid_status (got_pid, status);
- }
-
- if (got_pid > 0)
- {
- set_pid_status (got_pid, status);
- set_pid_flags (got_pid, PROC_NOTIFIED);
- }
-
- siginterrupt (SIGINT, 0);
- QUIT;
-
- return (got_pid > 0 ? process_exit_status (status) : -1);
-}
-
-/* Wait for all of the shell's children to exit. Called by the `wait'
- builtin. */
-void
-wait_for_background_pids ()
-{
- pid_t got_pid;
- WAIT status;
-
- /* If we aren't using job control, we let the kernel take care of the
- bookkeeping for us. wait () will return -1 and set errno to ECHILD
- when there are no more unwaited-for child processes on both
- 4.2 BSD-based and System V-based systems. */
-
- siginterrupt (SIGINT, 1);
-
- /* Wait for ECHILD */
- while ((got_pid = WAITPID (-1, &status, 0)) != -1)
- set_pid_status (got_pid, status);
-
- if (errno != EINTR && errno != ECHILD)
- {
- siginterrupt (SIGINT, 0);
- sys_error("wait");
- }
-
- siginterrupt (SIGINT, 0);
- QUIT;
-
- mark_dead_jobs_as_notified (1);
- cleanup_dead_jobs ();
-}
-
-/* Make OLD_SIGINT_HANDLER the SIGINT signal handler. */
-#define INVALID_SIGNAL_HANDLER (SigHandler *)wait_for_background_pids
-static SigHandler *old_sigint_handler = INVALID_SIGNAL_HANDLER;
-
-static void
-restore_sigint_handler ()
-{
- if (old_sigint_handler != INVALID_SIGNAL_HANDLER)
- {
- set_signal_handler (SIGINT, old_sigint_handler);
- old_sigint_handler = INVALID_SIGNAL_HANDLER;
- }
-}
-
-/* Handle SIGINT while we are waiting for children in a script to exit.
- All interrupts are effectively ignored by the shell, but allowed to
- kill a running job. */
-static sighandler
-wait_sigint_handler (sig)
- int sig;
-{
- SigHandler *sigint_handler;
-
- /* If we got a SIGINT while in `wait', and SIGINT is trapped, do
- what POSIX.2 says (see builtins/wait.def for more info). */
- if (this_shell_builtin && this_shell_builtin == wait_builtin &&
- signal_is_trapped (SIGINT) &&
- ((sigint_handler = trap_to_sighandler (SIGINT)) == trap_handler))
- {
- last_command_exit_value = EXECUTION_FAILURE;
- restore_sigint_handler ();
- interrupt_immediately = 0;
- trap_handler (SIGINT); /* set pending_traps[SIGINT] */
- wait_signal_received = SIGINT;
- longjmp (wait_intr_buf, 1);
- }
-
- if (interrupt_immediately)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- restore_sigint_handler ();
- ADDINTERRUPT;
- QUIT;
- }
-
- wait_sigint_received = 1;
-
- SIGRETURN (0);
-}
-
-static char *
-j_strsignal (s)
- int s;
-{
- static char retcode_name_buffer[64] = { '\0' };
- char *x;
-
- x = strsignal (s);
- if (x == 0)
- {
- x = retcode_name_buffer;
- sprintf (x, "Signal %d", s);
- }
- return x;
-}
-
-/* Wait for pid (one of our children) to terminate. This is called only
- by the execution code in execute_cmd.c. */
-int
-wait_for (pid)
- pid_t pid;
-{
- int return_val, pstatus;
- pid_t got_pid;
- WAIT status;
-
- pstatus = find_status_by_pid (pid);
-
- if (pstatus == PROC_BAD)
- return (0);
-
- if (pstatus != PROC_STILL_ALIVE)
- {
- if (pstatus > 128)
- last_command_exit_signal = find_termsig_by_pid (pid);
- return (pstatus);
- }
-
- /* If we are running a script, ignore SIGINT while we're waiting for
- a child to exit. The loop below does some of this, but not all. */
- wait_sigint_received = 0;
- if (interactive_shell == 0)
- old_sigint_handler = set_signal_handler (SIGINT, wait_sigint_handler);
-
- while ((got_pid = WAITPID (-1, &status, 0)) != pid) /* XXX was pid now -1 */
- {
- CHECK_TERMSIG;
- if (got_pid < 0 && errno == ECHILD)
- {
-#if !defined (_POSIX_VERSION)
- status.w_termsig = status.w_retcode = 0;
-#else
- status = 0;
-#endif /* _POSIX_VERSION */
- break;
- }
- else if (got_pid < 0 && errno != EINTR)
- programming_error ("wait_for(%ld): %s", (long)pid, strerror(errno));
- else if (got_pid > 0)
- set_pid_status (got_pid, status);
- }
-
- if (got_pid > 0)
- set_pid_status (got_pid, status);
-
-#if defined (HAVE_WAITPID)
- if (got_pid >= 0)
- reap_zombie_children ();
-#endif /* HAVE_WAITPID */
-
- if (interactive_shell == 0)
- {
- SigHandler *temp_handler;
-
- temp_handler = old_sigint_handler;
- restore_sigint_handler ();
-
- /* If the job exited because of SIGINT, make sure the shell acts as if
- it had received one also. */
- if (WIFSIGNALED (status) && (WTERMSIG (status) == SIGINT))
- {
-
- if (maybe_call_trap_handler (SIGINT) == 0)
- {
- if (temp_handler == SIG_DFL)
- termsig_handler (SIGINT);
- else if (temp_handler != INVALID_SIGNAL_HANDLER && temp_handler != SIG_IGN)
- (*temp_handler) (SIGINT);
- }
- }
- }
-
- /* Default return value. */
- /* ``a full 8 bits of status is returned'' */
- return_val = process_exit_status (status);
- last_command_exit_signal = get_termsig (status);
-
-#if defined (DONT_REPORT_SIGPIPE) && defined (DONT_REPORT_SIGTERM)
-# define REPORTSIG(x) ((x) != SIGINT && (x) != SIGPIPE && (x) != SIGTERM)
-#elif !defined (DONT_REPORT_SIGPIPE) && !defined (DONT_REPORT_SIGTERM)
-# define REPORTSIG(x) ((x) != SIGINT)
-#elif defined (DONT_REPORT_SIGPIPE)
-# define REPORTSIG(x) ((x) != SIGINT && (x) != SIGPIPE)
-#else
-# define REPORTSIG(x) ((x) != SIGINT && (x) != SIGTERM)
-#endiof
-
- if ((WIFSTOPPED (status) == 0) && WIFSIGNALED (status) && REPORTSIG(WTERMSIG (status)))
- {
- fprintf (stderr, "%s", j_strsignal (WTERMSIG (status)));
- if (WIFCORED (status))
- fprintf (stderr, _(" (core dumped)"));
- fprintf (stderr, "\n");
- }
-
- if (interactive_shell && subshell_environment == 0)
- {
- if (WIFSIGNALED (status) || WIFSTOPPED (status))
- set_tty_state ();
- else
- get_tty_state ();
- }
- else if (interactive_shell == 0 && subshell_environment == 0 && check_window_size)
- get_new_window_size (0, (int *)0, (int *)0);
-
- return (return_val);
-}
-
-/* Send PID SIGNAL. Returns -1 on failure, 0 on success. If GROUP is non-zero,
- or PID is less than -1, then kill the process group associated with PID. */
-int
-kill_pid (pid, signal, group)
- pid_t pid;
- int signal, group;
-{
- int result;
-
- if (pid < -1)
- {
- pid = -pid;
- group = 1;
- }
- result = group ? killpg (pid, signal) : kill (pid, signal);
- return (result);
-}
-
-static TTYSTRUCT shell_tty_info;
-static int got_tty_state;
-
-/* Fill the contents of shell_tty_info with the current tty info. */
-get_tty_state ()
-{
- int tty;
-
- tty = input_tty ();
- if (tty != -1)
- {
- ttgetattr (tty, &shell_tty_info);
- got_tty_state = 1;
- if (check_window_size)
- get_new_window_size (0, (int *)0, (int *)0);
- }
-}
-
-/* Make the current tty use the state in shell_tty_info. */
-int
-set_tty_state ()
-{
- int tty;
-
- tty = input_tty ();
- if (tty != -1)
- {
- if (got_tty_state == 0)
- return 0;
- ttsetattr (tty, &shell_tty_info);
- }
- return 0;
-}
-
-/* Give the terminal to PGRP. */
-give_terminal_to (pgrp, force)
- pid_t pgrp;
- int force;
-{
-}
-
-/* Stop a pipeline. */
-int
-stop_pipeline (async, ignore)
- int async;
- COMMAND *ignore;
-{
- already_making_children = 0;
- return 0;
-}
-
-void
-start_pipeline ()
-{
- already_making_children = 1;
-}
-
-void
-stop_making_children ()
-{
- already_making_children = 0;
-}
-
-int
-get_job_by_pid (pid, block)
- pid_t pid;
- int block;
-{
- int i;
-
- i = find_index_by_pid (pid);
- return ((i == NO_PID) ? PROC_BAD : i);
-}
-
-/* Print descriptive information about the job with leader pid PID. */
-void
-describe_pid (pid)
- pid_t pid;
-{
- fprintf (stderr, "%ld\n", (long) pid);
-}
-
-void
-freeze_jobs_list ()
-{
-}
-
-void
-unfreeze_jobs_list ()
-{
-}
-
-int
-count_all_jobs ()
-{
- return 0;
-}
+++ /dev/null
-*** ../bash-4.2-patched/parse.y 2011-02-26 19:19:05.000000000 -0500
---- parse.y 2011-06-24 20:08:22.000000000 -0400
-***************
-*** 3843,3846 ****
---- 3849,3853 ----
- {
- sh_parser_state_t ps;
-+ sh_input_line_state_t ls;
- int orig_ind, nc, sflags;
- char *ret, *s, *ep, *ostring;
-***************
-*** 3850,3857 ****
---- 3857,3866 ----
- ostring = string;
-
-+ /*itrace("xparse_dolparen: size = %d shell_input_line = `%s'", shell_input_line_size, shell_input_line);*/
- sflags = SEVAL_NONINT|SEVAL_NOHIST|SEVAL_NOFREE;
- if (flags & SX_NOLONGJMP)
- sflags |= SEVAL_NOLONGJMP;
- save_parser_state (&ps);
-+ save_input_line_state (&ls);
-
- /*(*/
-***************
-*** 3862,3865 ****
---- 3871,3876 ----
- restore_parser_state (&ps);
- reset_parser ();
-+ /* reset_parser clears shell_input_line and associated variables */
-+ restore_input_line_state (&ls);
- if (interactive)
- token_to_read = 0;
-***************
-*** 5909,5912 ****
---- 5920,5929 ----
- ps->echo_input_at_read = echo_input_at_read;
-
-+ ps->token = token;
-+ ps->token_buffer_size = token_buffer_size;
-+ /* Force reallocation on next call to read_token_word */
-+ token = 0;
-+ token_buffer_size = 0;
-+
- return (ps);
- }
-***************
-*** 5950,5953 ****
---- 5967,6006 ----
- expand_aliases = ps->expand_aliases;
- echo_input_at_read = ps->echo_input_at_read;
-+
-+ FREE (token);
-+ token = ps->token;
-+ token_buffer_size = ps->token_buffer_size;
-+ }
-+
-+ sh_input_line_state_t *
-+ save_input_line_state (ls)
-+ sh_input_line_state_t *ls;
-+ {
-+ if (ls == 0)
-+ ls = (sh_input_line_state_t *)xmalloc (sizeof (sh_input_line_state_t));
-+ if (ls == 0)
-+ return ((sh_input_line_state_t *)NULL);
-+
-+ ls->input_line = shell_input_line;
-+ ls->input_line_size = shell_input_line_size;
-+ ls->input_line_len = shell_input_line_len;
-+ ls->input_line_index = shell_input_line_index;
-+
-+ /* force reallocation */
-+ shell_input_line = 0;
-+ shell_input_line_size = shell_input_line_len = shell_input_line_index = 0;
-+ }
-+
-+ void
-+ restore_input_line_state (ls)
-+ sh_input_line_state_t *ls;
-+ {
-+ FREE (shell_input_line);
-+ shell_input_line = ls->input_line;
-+ shell_input_line_size = ls->input_line_size;
-+ shell_input_line_len = ls->input_line_len;
-+ shell_input_line_index = ls->input_line_index;
-+
-+ set_line_mbstate ();
- }
-
+++ /dev/null
-*** ../bash-4.2-patched/parse.y 2011-02-26 19:19:05.000000000 -0500
---- parse.y 2011-06-24 20:08:22.000000000 -0400
-***************
-*** 1439,1448 ****
- old_sigint = (SigHandler *)set_signal_handler (SIGINT, sigint_sighandler);
- }
-- terminate_immediately = 1;
-
- current_readline_line = readline (current_readline_prompt ?
- current_readline_prompt : "");
-
-! terminate_immediately = 0;
- if (signal_is_ignored (SIGINT) == 0)
- {
---- 1439,1447 ----
- old_sigint = (SigHandler *)set_signal_handler (SIGINT, sigint_sighandler);
- }
-
- current_readline_line = readline (current_readline_prompt ?
- current_readline_prompt : "");
-
-! CHECK_TERMSIG;
- if (signal_is_ignored (SIGINT) == 0)
- {
-***************
-*** 1604,1617 ****
- {
- if (interactive)
-! {
-! interrupt_immediately++;
-! terminate_immediately++;
-! }
- result = getc_with_restart (bash_input.location.file);
- if (interactive)
-! {
-! interrupt_immediately--;
-! terminate_immediately--;
-! }
- }
- return (result);
---- 1603,1615 ----
- {
- if (interactive)
-! interrupt_immediately++;
-!
-! /* XXX - don't need terminate_immediately; getc_with_restart checks
-! for terminating signals itself if read returns < 0 */
- result = getc_with_restart (bash_input.location.file);
-+
- if (interactive)
-! interrupt_immediately--;
-!
- }
- return (result);
-***************
-*** 3211,3215 ****
---- 3209,3217 ----
-
- RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
-+ #if 0
- if MBTEST(ch == CTLESC || ch == CTLNUL)
-+ #else
-+ if MBTEST(ch == CTLESC)
-+ #endif
- ret[retind++] = CTLESC;
- ret[retind++] = ch;
-***************
-*** 3530,3534 ****
---- 3532,3540 ----
-
- RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
-+ #if 0
- if MBTEST(ch == CTLESC || ch == CTLNUL)
-+ #else
-+ if MBTEST(ch == CTLESC)
-+ #endif
- ret[retind++] = CTLESC;
- ret[retind++] = ch;
-***************
-*** 3843,3846 ****
---- 3849,3853 ----
- {
- sh_parser_state_t ps;
-+ sh_input_line_state_t ls;
- int orig_ind, nc, sflags;
- char *ret, *s, *ep, *ostring;
-***************
-*** 3850,3857 ****
---- 3857,3866 ----
- ostring = string;
-
-+ /*itrace("xparse_dolparen: size = %d shell_input_line = `%s'", shell_input_line_size, shell_input_line);*/
- sflags = SEVAL_NONINT|SEVAL_NOHIST|SEVAL_NOFREE;
- if (flags & SX_NOLONGJMP)
- sflags |= SEVAL_NOLONGJMP;
- save_parser_state (&ps);
-+ save_input_line_state (&ls);
-
- /*(*/
-***************
-*** 3862,3865 ****
---- 3871,3876 ----
- restore_parser_state (&ps);
- reset_parser ();
-+ /* reset_parser clears shell_input_line and associated variables */
-+ restore_input_line_state (&ls);
- if (interactive)
- token_to_read = 0;
-***************
-*** 4432,4436 ****
- if (ttok == &matched_pair_error)
- return -1; /* Bail immediately. */
-! RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
---- 4443,4447 ----
- if (ttok == &matched_pair_error)
- return -1; /* Bail immediately. */
-! RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 3,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
-***************
-*** 4454,4458 ****
- peek_char = shell_getc (1);
- /* $(...), <(...), >(...), $((...)), ${...}, and $[...] constructs */
-! if MBTEST(peek_char == '(' || \
- ((peek_char == '{' || peek_char == '[') && character == '$')) /* ) ] } */
- {
---- 4465,4469 ----
- peek_char = shell_getc (1);
- /* $(...), <(...), >(...), $((...)), ${...}, and $[...] constructs */
-! if MBTEST(peek_char == '(' ||
- ((peek_char == '{' || peek_char == '[') && character == '$')) /* ) ] } */
- {
-***************
-*** 4474,4478 ****
- if (ttok == &matched_pair_error)
- return -1; /* Bail immediately. */
-! RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
---- 4485,4489 ----
- if (ttok == &matched_pair_error)
- return -1; /* Bail immediately. */
-! RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 3,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
-***************
-*** 4525,4529 ****
- }
-
-! RESIZE_MALLOCED_BUFFER (token, token_index, ttranslen + 2,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
---- 4536,4540 ----
- }
-
-! RESIZE_MALLOCED_BUFFER (token, token_index, ttranslen + 1,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
-***************
-*** 4539,4553 ****
- else if MBTEST(character == '$' && peek_char == '$')
- {
-- ttok = (char *)xmalloc (3);
-- ttok[0] = ttok[1] = '$';
-- ttok[2] = '\0';
- RESIZE_MALLOCED_BUFFER (token, token_index, 3,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
-! strcpy (token + token_index, ttok);
-! token_index += 2;
- dollar_present = 1;
- all_digit_token = 0;
-- FREE (ttok);
- goto next_character;
- }
---- 4550,4560 ----
- else if MBTEST(character == '$' && peek_char == '$')
- {
- RESIZE_MALLOCED_BUFFER (token, token_index, 3,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
-! token[token_index++] = '$';
-! token[token_index++] = peek_char;
- dollar_present = 1;
- all_digit_token = 0;
- goto next_character;
- }
-***************
-*** 4619,4637 ****
- }
-
-! got_character:
-
- if (character == CTLESC || character == CTLNUL)
-! token[token_index++] = CTLESC;
-
-! got_escaped_character:
-
- all_digit_token &= DIGIT (character);
- dollar_present |= character == '$';
-
-- token[token_index++] = character;
--
-- RESIZE_MALLOCED_BUFFER (token, token_index, 1, token_buffer_size,
-- TOKEN_DEFAULT_GROW_SIZE);
--
- next_character:
- if (character == '\n' && SHOULD_PROMPT ())
---- 4626,4647 ----
- }
-
-! got_character:
-
- if (character == CTLESC || character == CTLNUL)
-! {
-! RESIZE_MALLOCED_BUFFER (token, token_index, 2, token_buffer_size,
-! TOKEN_DEFAULT_GROW_SIZE);
-! token[token_index++] = CTLESC;
-! }
-! else
-! got_escaped_character:
-! RESIZE_MALLOCED_BUFFER (token, token_index, 1, token_buffer_size,
-! TOKEN_DEFAULT_GROW_SIZE);
-
-! token[token_index++] = character;
-
- all_digit_token &= DIGIT (character);
- dollar_present |= character == '$';
-
- next_character:
- if (character == '\n' && SHOULD_PROMPT ())
-***************
-*** 4647,4650 ****
---- 4657,4661 ----
- got_token:
-
-+ /* Calls to RESIZE_MALLOCED_BUFFER ensure there is sufficient room. */
- token[token_index] = '\0';
-
-***************
-*** 4653,4658 ****
- a '>' or '<', then, and ONLY then, is this input token a NUMBER.
- Otherwise, it is just a word, and should be returned as such. */
-! if MBTEST(all_digit_token && (character == '<' || character == '>' || \
-! last_read_token == LESS_AND || \
- last_read_token == GREATER_AND))
- {
---- 4664,4669 ----
- a '>' or '<', then, and ONLY then, is this input token a NUMBER.
- Otherwise, it is just a word, and should be returned as such. */
-! if MBTEST(all_digit_token && (character == '<' || character == '>' ||
-! last_read_token == LESS_AND ||
- last_read_token == GREATER_AND))
- {
-***************
-*** 5909,5912 ****
---- 5920,5929 ----
- ps->echo_input_at_read = echo_input_at_read;
-
-+ ps->token = token;
-+ ps->token_buffer_size = token_buffer_size;
-+ /* Force reallocation on next call to read_token_word */
-+ token = 0;
-+ token_buffer_size = 0;
-+
- return (ps);
- }
-***************
-*** 5950,5953 ****
---- 5967,6006 ----
- expand_aliases = ps->expand_aliases;
- echo_input_at_read = ps->echo_input_at_read;
-+
-+ FREE (token);
-+ token = ps->token;
-+ token_buffer_size = ps->token_buffer_size;
-+ }
-+
-+ sh_input_line_state_t *
-+ save_input_line_state (ls)
-+ sh_input_line_state_t *ls;
-+ {
-+ if (ls == 0)
-+ ls = (sh_input_line_state_t *)xmalloc (sizeof (sh_input_line_state_t));
-+ if (ls == 0)
-+ return ((sh_input_line_state_t *)NULL);
-+
-+ ls->input_line = shell_input_line;
-+ ls->input_line_size = shell_input_line_size;
-+ ls->input_line_len = shell_input_line_len;
-+ ls->input_line_index = shell_input_line_index;
-+
-+ /* force reallocation */
-+ shell_input_line = 0;
-+ shell_input_line_size = shell_input_line_len = shell_input_line_index = 0;
-+ }
-+
-+ void
-+ restore_input_line_state (ls)
-+ sh_input_line_state_t *ls;
-+ {
-+ FREE (shell_input_line);
-+ shell_input_line = ls->input_line;
-+ shell_input_line_size = ls->input_line_size;
-+ shell_input_line_len = ls->input_line_len;
-+ shell_input_line_index = ls->input_line_index;
-+
-+ set_line_mbstate ();
- }
-
+++ /dev/null
-/* parse.y - Yacc grammar for bash. */
-
-/* Copyright (C) 1989-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-%{
-#include "config.h"
-
-#include "bashtypes.h"
-#include "bashansi.h"
-
-#include "filecntl.h"
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#if defined (HAVE_LOCALE_H)
-# include <locale.h>
-#endif
-
-#include <stdio.h>
-#include "chartypes.h"
-#include <signal.h>
-
-#include "memalloc.h"
-
-#include "bashintl.h"
-
-#define NEED_STRFTIME_DECL /* used in externs.h */
-
-#include "shell.h"
-#include "trap.h"
-#include "flags.h"
-#include "parser.h"
-#include "mailcheck.h"
-#include "test.h"
-#include "builtins.h"
-#include "builtins/common.h"
-#include "builtins/builtext.h"
-
-#include "shmbutil.h"
-
-#if defined (READLINE)
-# include "bashline.h"
-# include <readline/readline.h>
-#endif /* READLINE */
-
-#if defined (HISTORY)
-# include "bashhist.h"
-# include <readline/history.h>
-#endif /* HISTORY */
-
-#if defined (JOB_CONTROL)
-# include "jobs.h"
-#endif /* JOB_CONTROL */
-
-#if defined (ALIAS)
-# include "alias.h"
-#else
-typedef void *alias_t;
-#endif /* ALIAS */
-
-#if defined (PROMPT_STRING_DECODE)
-# ifndef _MINIX
-# include <sys/param.h>
-# endif
-# include <time.h>
-# if defined (TM_IN_SYS_TIME)
-# include <sys/types.h>
-# include <sys/time.h>
-# endif /* TM_IN_SYS_TIME */
-# include "maxpath.h"
-#endif /* PROMPT_STRING_DECODE */
-
-#define RE_READ_TOKEN -99
-#define NO_EXPANSION -100
-
-#ifdef DEBUG
-# define YYDEBUG 1
-#else
-# define YYDEBUG 0
-#endif
-
-#if defined (HANDLE_MULTIBYTE)
-# define last_shell_getc_is_singlebyte \
- ((shell_input_line_index > 1) \
- ? shell_input_line_property[shell_input_line_index - 1] \
- : 1)
-# define MBTEST(x) ((x) && last_shell_getc_is_singlebyte)
-#else
-# define last_shell_getc_is_singlebyte 1
-# define MBTEST(x) ((x))
-#endif
-
-#if defined (EXTENDED_GLOB)
-extern int extended_glob;
-#endif
-
-extern int eof_encountered;
-extern int no_line_editing, running_under_emacs;
-extern int current_command_number;
-extern int sourcelevel, parse_and_execute_level;
-extern int posixly_correct;
-extern int last_command_exit_value;
-extern pid_t last_command_subst_pid;
-extern char *shell_name, *current_host_name;
-extern char *dist_version;
-extern int patch_level;
-extern int dump_translatable_strings, dump_po_strings;
-extern sh_builtin_func_t *last_shell_builtin, *this_shell_builtin;
-#if defined (BUFFERED_INPUT)
-extern int bash_input_fd_changed;
-#endif
-
-extern int errno;
-/* **************************************************************** */
-/* */
-/* "Forward" declarations */
-/* */
-/* **************************************************************** */
-
-#ifdef DEBUG
-static void debug_parser __P((int));
-#endif
-
-static int yy_getc __P((void));
-static int yy_ungetc __P((int));
-
-#if defined (READLINE)
-static int yy_readline_get __P((void));
-static int yy_readline_unget __P((int));
-#endif
-
-static int yy_string_get __P((void));
-static int yy_string_unget __P((int));
-static void rewind_input_string __P((void));
-static int yy_stream_get __P((void));
-static int yy_stream_unget __P((int));
-
-static int shell_getc __P((int));
-static void shell_ungetc __P((int));
-static void discard_until __P((int));
-
-#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
-static void push_string __P((char *, int, alias_t *));
-static void pop_string __P((void));
-static void free_string_list __P((void));
-#endif
-
-static char *read_a_line __P((int));
-
-static int reserved_word_acceptable __P((int));
-static int yylex __P((void));
-static int alias_expand_token __P((char *));
-static int time_command_acceptable __P((void));
-static int special_case_tokens __P((char *));
-static int read_token __P((int));
-static char *parse_matched_pair __P((int, int, int, int *, int));
-static char *parse_comsub __P((int, int, int, int *, int));
-#if defined (ARRAY_VARS)
-static char *parse_compound_assignment __P((int *));
-#endif
-#if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND)
-static int parse_dparen __P((int));
-static int parse_arith_cmd __P((char **, int));
-#endif
-#if defined (COND_COMMAND)
-static void cond_error __P((void));
-static COND_COM *cond_expr __P((void));
-static COND_COM *cond_or __P((void));
-static COND_COM *cond_and __P((void));
-static COND_COM *cond_term __P((void));
-static int cond_skip_newlines __P((void));
-static COMMAND *parse_cond_command __P((void));
-#endif
-#if defined (ARRAY_VARS)
-static int token_is_assignment __P((char *, int));
-static int token_is_ident __P((char *, int));
-#endif
-static int read_token_word __P((int));
-static void discard_parser_constructs __P((int));
-
-static char *error_token_from_token __P((int));
-static char *error_token_from_text __P((void));
-static void print_offending_line __P((void));
-static void report_syntax_error __P((char *));
-
-static void handle_eof_input_unit __P((void));
-static void prompt_again __P((void));
-#if 0
-static void reset_readline_prompt __P((void));
-#endif
-static void print_prompt __P((void));
-
-#if defined (HANDLE_MULTIBYTE)
-static void set_line_mbstate __P((void));
-static char *shell_input_line_property = NULL;
-#else
-# define set_line_mbstate()
-#endif
-
-extern int yyerror __P((const char *));
-
-#ifdef DEBUG
-extern int yydebug;
-#endif
-
-/* Default prompt strings */
-char *primary_prompt = PPROMPT;
-char *secondary_prompt = SPROMPT;
-
-/* PROMPT_STRING_POINTER points to one of these, never to an actual string. */
-char *ps1_prompt, *ps2_prompt;
-
-/* Handle on the current prompt string. Indirectly points through
- ps1_ or ps2_prompt. */
-char **prompt_string_pointer = (char **)NULL;
-char *current_prompt_string;
-
-/* Non-zero means we expand aliases in commands. */
-int expand_aliases = 0;
-
-/* If non-zero, the decoded prompt string undergoes parameter and
- variable substitution, command substitution, arithmetic substitution,
- string expansion, process substitution, and quote removal in
- decode_prompt_string. */
-int promptvars = 1;
-
-/* If non-zero, $'...' and $"..." are expanded when they appear within
- a ${...} expansion, even when the expansion appears within double
- quotes. */
-int extended_quote = 1;
-
-/* The number of lines read from input while creating the current command. */
-int current_command_line_count;
-
-/* The number of lines in a command saved while we run parse_and_execute */
-int saved_command_line_count;
-
-/* The token that currently denotes the end of parse. */
-int shell_eof_token;
-
-/* The token currently being read. */
-int current_token;
-
-/* The current parser state. */
-int parser_state;
-
-/* Variables to manage the task of reading here documents, because we need to
- defer the reading until after a complete command has been collected. */
-static REDIRECT *redir_stack[10];
-int need_here_doc;
-
-/* Where shell input comes from. History expansion is performed on each
- line when the shell is interactive. */
-static char *shell_input_line = (char *)NULL;
-static int shell_input_line_index;
-static int shell_input_line_size; /* Amount allocated for shell_input_line. */
-static int shell_input_line_len; /* strlen (shell_input_line) */
-
-/* Either zero or EOF. */
-static int shell_input_line_terminator;
-
-/* The line number in a script on which a function definition starts. */
-static int function_dstart;
-
-/* The line number in a script on which a function body starts. */
-static int function_bstart;
-
-/* The line number in a script at which an arithmetic for command starts. */
-static int arith_for_lineno;
-
-/* The decoded prompt string. Used if READLINE is not defined or if
- editing is turned off. Analogous to current_readline_prompt. */
-static char *current_decoded_prompt;
-
-/* The last read token, or NULL. read_token () uses this for context
- checking. */
-static int last_read_token;
-
-/* The token read prior to last_read_token. */
-static int token_before_that;
-
-/* The token read prior to token_before_that. */
-static int two_tokens_ago;
-
-static int global_extglob;
-
-/* The line number in a script where the word in a `case WORD', `select WORD'
- or `for WORD' begins. This is a nested command maximum, since the array
- index is decremented after a case, select, or for command is parsed. */
-#define MAX_CASE_NEST 128
-static int word_lineno[MAX_CASE_NEST];
-static int word_top = -1;
-
-/* If non-zero, it is the token that we want read_token to return
- regardless of what text is (or isn't) present to be read. This
- is reset by read_token. If token_to_read == WORD or
- ASSIGNMENT_WORD, yylval.word should be set to word_desc_to_read. */
-static int token_to_read;
-static WORD_DESC *word_desc_to_read;
-
-static REDIRECTEE source;
-static REDIRECTEE redir;
-%}
-
-%union {
- WORD_DESC *word; /* the word that we read. */
- int number; /* the number that we read. */
- WORD_LIST *word_list;
- COMMAND *command;
- REDIRECT *redirect;
- ELEMENT element;
- PATTERN_LIST *pattern;
-}
-
-/* Reserved words. Members of the first group are only recognized
- in the case that they are preceded by a list_terminator. Members
- of the second group are for [[...]] commands. Members of the
- third group are recognized only under special circumstances. */
-%token IF THEN ELSE ELIF FI CASE ESAC FOR SELECT WHILE UNTIL DO DONE FUNCTION COPROC
-%token COND_START COND_END COND_ERROR
-%token IN BANG TIME TIMEOPT TIMEIGN
-
-/* More general tokens. yylex () knows how to make these. */
-%token <word> WORD ASSIGNMENT_WORD REDIR_WORD
-%token <number> NUMBER
-%token <word_list> ARITH_CMD ARITH_FOR_EXPRS
-%token <command> COND_CMD
-%token AND_AND OR_OR GREATER_GREATER LESS_LESS LESS_AND LESS_LESS_LESS
-%token GREATER_AND SEMI_SEMI SEMI_AND SEMI_SEMI_AND
-%token LESS_LESS_MINUS AND_GREATER AND_GREATER_GREATER LESS_GREATER
-%token GREATER_BAR BAR_AND
-
-/* The types that the various syntactical units return. */
-
-%type <command> inputunit command pipeline pipeline_command
-%type <command> list list0 list1 compound_list simple_list simple_list1
-%type <command> simple_command shell_command
-%type <command> for_command select_command case_command group_command
-%type <command> arith_command
-%type <command> cond_command
-%type <command> arith_for_command
-%type <command> coproc
-%type <command> function_def function_body if_command elif_clause subshell
-%type <redirect> redirection redirection_list
-%type <element> simple_command_element
-%type <word_list> word_list pattern
-%type <pattern> pattern_list case_clause_sequence case_clause
-%type <number> timespec
-%type <number> list_terminator
-
-%start inputunit
-
-%left '&' ';' '\n' yacc_EOF
-%left AND_AND OR_OR
-%right '|' BAR_AND
-%%
-
-inputunit: simple_list simple_list_terminator
- {
- /* Case of regular command. Discard the error
- safety net,and return the command just parsed. */
- global_command = $1;
- eof_encountered = 0;
- /* discard_parser_constructs (0); */
- if (parser_state & PST_CMDSUBST)
- parser_state |= PST_EOFTOKEN;
- YYACCEPT;
- }
- | '\n'
- {
- /* Case of regular command, but not a very
- interesting one. Return a NULL command. */
- global_command = (COMMAND *)NULL;
- if (parser_state & PST_CMDSUBST)
- parser_state |= PST_EOFTOKEN;
- YYACCEPT;
- }
- | error '\n'
- {
- /* Error during parsing. Return NULL command. */
- global_command = (COMMAND *)NULL;
- eof_encountered = 0;
- /* discard_parser_constructs (1); */
- if (interactive && parse_and_execute_level == 0)
- {
- YYACCEPT;
- }
- else
- {
- YYABORT;
- }
- }
- | yacc_EOF
- {
- /* Case of EOF seen by itself. Do ignoreeof or
- not. */
- global_command = (COMMAND *)NULL;
- handle_eof_input_unit ();
- YYACCEPT;
- }
- ;
-
-word_list: WORD
- { $$ = make_word_list ($1, (WORD_LIST *)NULL); }
- | word_list WORD
- { $$ = make_word_list ($2, $1); }
- ;
-
-redirection: '>' WORD
- {
- source.dest = 1;
- redir.filename = $2;
- $$ = make_redirection (source, r_output_direction, redir, 0);
- }
- | '<' WORD
- {
- source.dest = 0;
- redir.filename = $2;
- $$ = make_redirection (source, r_input_direction, redir, 0);
- }
- | NUMBER '>' WORD
- {
- source.dest = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_output_direction, redir, 0);
- }
- | NUMBER '<' WORD
- {
- source.dest = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_input_direction, redir, 0);
- }
- | REDIR_WORD '>' WORD
- {
- source.filename = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_output_direction, redir, REDIR_VARASSIGN);
- }
- | REDIR_WORD '<' WORD
- {
- source.filename = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_input_direction, redir, REDIR_VARASSIGN);
- }
- | GREATER_GREATER WORD
- {
- source.dest = 1;
- redir.filename = $2;
- $$ = make_redirection (source, r_appending_to, redir, 0);
- }
- | NUMBER GREATER_GREATER WORD
- {
- source.dest = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_appending_to, redir, 0);
- }
- | REDIR_WORD GREATER_GREATER WORD
- {
- source.filename = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_appending_to, redir, REDIR_VARASSIGN);
- }
- | GREATER_BAR WORD
- {
- source.dest = 1;
- redir.filename = $2;
- $$ = make_redirection (source, r_output_force, redir, 0);
- }
- | NUMBER GREATER_BAR WORD
- {
- source.dest = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_output_force, redir, 0);
- }
- | REDIR_WORD GREATER_BAR WORD
- {
- source.filename = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_output_force, redir, REDIR_VARASSIGN);
- }
- | LESS_GREATER WORD
- {
- source.dest = 0;
- redir.filename = $2;
- $$ = make_redirection (source, r_input_output, redir, 0);
- }
- | NUMBER LESS_GREATER WORD
- {
- source.dest = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_input_output, redir, 0);
- }
- | REDIR_WORD LESS_GREATER WORD
- {
- source.filename = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_input_output, redir, REDIR_VARASSIGN);
- }
- | LESS_LESS WORD
- {
- source.dest = 0;
- redir.filename = $2;
- $$ = make_redirection (source, r_reading_until, redir, 0);
- redir_stack[need_here_doc++] = $$;
- }
- | NUMBER LESS_LESS WORD
- {
- source.dest = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_reading_until, redir, 0);
- redir_stack[need_here_doc++] = $$;
- }
- | REDIR_WORD LESS_LESS WORD
- {
- source.filename = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_reading_until, redir, REDIR_VARASSIGN);
- redir_stack[need_here_doc++] = $$;
- }
- | LESS_LESS_MINUS WORD
- {
- source.dest = 0;
- redir.filename = $2;
- $$ = make_redirection (source, r_deblank_reading_until, redir, 0);
- redir_stack[need_here_doc++] = $$;
- }
- | NUMBER LESS_LESS_MINUS WORD
- {
- source.dest = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_deblank_reading_until, redir, 0);
- redir_stack[need_here_doc++] = $$;
- }
- | REDIR_WORD LESS_LESS_MINUS WORD
- {
- source.filename = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_deblank_reading_until, redir, REDIR_VARASSIGN);
- redir_stack[need_here_doc++] = $$;
- }
- | LESS_LESS_LESS WORD
- {
- source.dest = 0;
- redir.filename = $2;
- $$ = make_redirection (source, r_reading_string, redir, 0);
- }
- | NUMBER LESS_LESS_LESS WORD
- {
- source.dest = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_reading_string, redir, 0);
- }
- | REDIR_WORD LESS_LESS_LESS WORD
- {
- source.filename = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_reading_string, redir, REDIR_VARASSIGN);
- }
- | LESS_AND NUMBER
- {
- source.dest = 0;
- redir.dest = $2;
- $$ = make_redirection (source, r_duplicating_input, redir, 0);
- }
- | NUMBER LESS_AND NUMBER
- {
- source.dest = $1;
- redir.dest = $3;
- $$ = make_redirection (source, r_duplicating_input, redir, 0);
- }
- | REDIR_WORD LESS_AND NUMBER
- {
- source.filename = $1;
- redir.dest = $3;
- $$ = make_redirection (source, r_duplicating_input, redir, REDIR_VARASSIGN);
- }
- | GREATER_AND NUMBER
- {
- source.dest = 1;
- redir.dest = $2;
- $$ = make_redirection (source, r_duplicating_output, redir, 0);
- }
- | NUMBER GREATER_AND NUMBER
- {
- source.dest = $1;
- redir.dest = $3;
- $$ = make_redirection (source, r_duplicating_output, redir, 0);
- }
- | REDIR_WORD GREATER_AND NUMBER
- {
- source.filename = $1;
- redir.dest = $3;
- $$ = make_redirection (source, r_duplicating_output, redir, REDIR_VARASSIGN);
- }
- | LESS_AND WORD
- {
- source.dest = 0;
- redir.filename = $2;
- $$ = make_redirection (source, r_duplicating_input_word, redir, 0);
- }
- | NUMBER LESS_AND WORD
- {
- source.dest = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_duplicating_input_word, redir, 0);
- }
- | REDIR_WORD LESS_AND WORD
- {
- source.filename = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_duplicating_input_word, redir, REDIR_VARASSIGN);
- }
- | GREATER_AND WORD
- {
- source.dest = 1;
- redir.filename = $2;
- $$ = make_redirection (source, r_duplicating_output_word, redir, 0);
- }
- | NUMBER GREATER_AND WORD
- {
- source.dest = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_duplicating_output_word, redir, 0);
- }
- | REDIR_WORD GREATER_AND WORD
- {
- source.filename = $1;
- redir.filename = $3;
- $$ = make_redirection (source, r_duplicating_output_word, redir, REDIR_VARASSIGN);
- }
- | GREATER_AND '-'
- {
- source.dest = 1;
- redir.dest = 0;
- $$ = make_redirection (source, r_close_this, redir, 0);
- }
- | NUMBER GREATER_AND '-'
- {
- source.dest = $1;
- redir.dest = 0;
- $$ = make_redirection (source, r_close_this, redir, 0);
- }
- | REDIR_WORD GREATER_AND '-'
- {
- source.filename = $1;
- redir.dest = 0;
- $$ = make_redirection (source, r_close_this, redir, REDIR_VARASSIGN);
- }
- | LESS_AND '-'
- {
- source.dest = 0;
- redir.dest = 0;
- $$ = make_redirection (source, r_close_this, redir, 0);
- }
- | NUMBER LESS_AND '-'
- {
- source.dest = $1;
- redir.dest = 0;
- $$ = make_redirection (source, r_close_this, redir, 0);
- }
- | REDIR_WORD LESS_AND '-'
- {
- source.filename = $1;
- redir.dest = 0;
- $$ = make_redirection (source, r_close_this, redir, REDIR_VARASSIGN);
- }
- | AND_GREATER WORD
- {
- source.dest = 1;
- redir.filename = $2;
- $$ = make_redirection (source, r_err_and_out, redir, 0);
- }
- | AND_GREATER_GREATER WORD
- {
- source.dest = 1;
- redir.filename = $2;
- $$ = make_redirection (source, r_append_err_and_out, redir, 0);
- }
- ;
-
-simple_command_element: WORD
- { $$.word = $1; $$.redirect = 0; }
- | ASSIGNMENT_WORD
- { $$.word = $1; $$.redirect = 0; }
- | redirection
- { $$.redirect = $1; $$.word = 0; }
- ;
-
-redirection_list: redirection
- {
- $$ = $1;
- }
- | redirection_list redirection
- {
- register REDIRECT *t;
-
- for (t = $1; t->next; t = t->next)
- ;
- t->next = $2;
- $$ = $1;
- }
- ;
-
-simple_command: simple_command_element
- { $$ = make_simple_command ($1, (COMMAND *)NULL); }
- | simple_command simple_command_element
- { $$ = make_simple_command ($2, $1); }
- ;
-
-command: simple_command
- { $$ = clean_simple_command ($1); }
- | shell_command
- { $$ = $1; }
- | shell_command redirection_list
- {
- COMMAND *tc;
-
- tc = $1;
- if (tc->redirects)
- {
- register REDIRECT *t;
- for (t = tc->redirects; t->next; t = t->next)
- ;
- t->next = $2;
- }
- else
- tc->redirects = $2;
- $$ = $1;
- }
- | function_def
- { $$ = $1; }
- | coproc
- { $$ = $1; }
- ;
-
-shell_command: for_command
- { $$ = $1; }
- | case_command
- { $$ = $1; }
- | WHILE compound_list DO compound_list DONE
- { $$ = make_while_command ($2, $4); }
- | UNTIL compound_list DO compound_list DONE
- { $$ = make_until_command ($2, $4); }
- | select_command
- { $$ = $1; }
- | if_command
- { $$ = $1; }
- | subshell
- { $$ = $1; }
- | group_command
- { $$ = $1; }
- | arith_command
- { $$ = $1; }
- | cond_command
- { $$ = $1; }
- | arith_for_command
- { $$ = $1; }
- ;
-
-for_command: FOR WORD newline_list DO compound_list DONE
- {
- $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | FOR WORD newline_list '{' compound_list '}'
- {
- $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | FOR WORD ';' newline_list DO compound_list DONE
- {
- $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | FOR WORD ';' newline_list '{' compound_list '}'
- {
- $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | FOR WORD newline_list IN word_list list_terminator newline_list DO compound_list DONE
- {
- $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | FOR WORD newline_list IN word_list list_terminator newline_list '{' compound_list '}'
- {
- $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | FOR WORD newline_list IN list_terminator newline_list DO compound_list DONE
- {
- $$ = make_for_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | FOR WORD newline_list IN list_terminator newline_list '{' compound_list '}'
- {
- $$ = make_for_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- ;
-
-arith_for_command: FOR ARITH_FOR_EXPRS list_terminator newline_list DO compound_list DONE
- {
- $$ = make_arith_for_command ($2, $6, arith_for_lineno);
- if (word_top > 0) word_top--;
- }
- | FOR ARITH_FOR_EXPRS list_terminator newline_list '{' compound_list '}'
- {
- $$ = make_arith_for_command ($2, $6, arith_for_lineno);
- if (word_top > 0) word_top--;
- }
- | FOR ARITH_FOR_EXPRS DO compound_list DONE
- {
- $$ = make_arith_for_command ($2, $4, arith_for_lineno);
- if (word_top > 0) word_top--;
- }
- | FOR ARITH_FOR_EXPRS '{' compound_list '}'
- {
- $$ = make_arith_for_command ($2, $4, arith_for_lineno);
- if (word_top > 0) word_top--;
- }
- ;
-
-select_command: SELECT WORD newline_list DO list DONE
- {
- $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | SELECT WORD newline_list '{' list '}'
- {
- $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | SELECT WORD ';' newline_list DO list DONE
- {
- $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | SELECT WORD ';' newline_list '{' list '}'
- {
- $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | SELECT WORD newline_list IN word_list list_terminator newline_list DO list DONE
- {
- $$ = make_select_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | SELECT WORD newline_list IN word_list list_terminator newline_list '{' list '}'
- {
- $$ = make_select_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- ;
-
-case_command: CASE WORD newline_list IN newline_list ESAC
- {
- $$ = make_case_command ($2, (PATTERN_LIST *)NULL, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | CASE WORD newline_list IN case_clause_sequence newline_list ESAC
- {
- $$ = make_case_command ($2, $5, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- | CASE WORD newline_list IN case_clause ESAC
- {
- $$ = make_case_command ($2, $5, word_lineno[word_top]);
- if (word_top > 0) word_top--;
- }
- ;
-
-function_def: WORD '(' ')' newline_list function_body
- { $$ = make_function_def ($1, $5, function_dstart, function_bstart); }
-
- | FUNCTION WORD '(' ')' newline_list function_body
- { $$ = make_function_def ($2, $6, function_dstart, function_bstart); }
-
- | FUNCTION WORD newline_list function_body
- { $$ = make_function_def ($2, $4, function_dstart, function_bstart); }
- ;
-
-function_body: shell_command
- { $$ = $1; }
- | shell_command redirection_list
- {
- COMMAND *tc;
-
- tc = $1;
- /* According to Posix.2 3.9.5, redirections
- specified after the body of a function should
- be attached to the function and performed when
- the function is executed, not as part of the
- function definition command. */
- /* XXX - I don't think it matters, but we might
- want to change this in the future to avoid
- problems differentiating between a function
- definition with a redirection and a function
- definition containing a single command with a
- redirection. The two are semantically equivalent,
- though -- the only difference is in how the
- command printing code displays the redirections. */
- if (tc->redirects)
- {
- register REDIRECT *t;
- for (t = tc->redirects; t->next; t = t->next)
- ;
- t->next = $2;
- }
- else
- tc->redirects = $2;
- $$ = $1;
- }
- ;
-
-subshell: '(' compound_list ')'
- {
- $$ = make_subshell_command ($2);
- $$->flags |= CMD_WANT_SUBSHELL;
- }
- ;
-
-coproc: COPROC shell_command
- {
- $$ = make_coproc_command ("COPROC", $2);
- $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL;
- }
- | COPROC shell_command redirection_list
- {
- COMMAND *tc;
-
- tc = $2;
- if (tc->redirects)
- {
- register REDIRECT *t;
- for (t = tc->redirects; t->next; t = t->next)
- ;
- t->next = $3;
- }
- else
- tc->redirects = $3;
- $$ = make_coproc_command ("COPROC", $2);
- $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL;
- }
- | COPROC WORD shell_command
- {
- $$ = make_coproc_command ($2->word, $3);
- $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL;
- }
- | COPROC WORD shell_command redirection_list
- {
- COMMAND *tc;
-
- tc = $3;
- if (tc->redirects)
- {
- register REDIRECT *t;
- for (t = tc->redirects; t->next; t = t->next)
- ;
- t->next = $4;
- }
- else
- tc->redirects = $4;
- $$ = make_coproc_command ($2->word, $3);
- $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL;
- }
- | COPROC simple_command
- {
- $$ = make_coproc_command ("COPROC", clean_simple_command ($2));
- $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL;
- }
- ;
-
-if_command: IF compound_list THEN compound_list FI
- { $$ = make_if_command ($2, $4, (COMMAND *)NULL); }
- | IF compound_list THEN compound_list ELSE compound_list FI
- { $$ = make_if_command ($2, $4, $6); }
- | IF compound_list THEN compound_list elif_clause FI
- { $$ = make_if_command ($2, $4, $5); }
- ;
-
-
-group_command: '{' compound_list '}'
- { $$ = make_group_command ($2); }
- ;
-
-arith_command: ARITH_CMD
- { $$ = make_arith_command ($1); }
- ;
-
-cond_command: COND_START COND_CMD COND_END
- { $$ = $2; }
- ;
-
-elif_clause: ELIF compound_list THEN compound_list
- { $$ = make_if_command ($2, $4, (COMMAND *)NULL); }
- | ELIF compound_list THEN compound_list ELSE compound_list
- { $$ = make_if_command ($2, $4, $6); }
- | ELIF compound_list THEN compound_list elif_clause
- { $$ = make_if_command ($2, $4, $5); }
- ;
-
-case_clause: pattern_list
- | case_clause_sequence pattern_list
- { $2->next = $1; $$ = $2; }
- ;
-
-pattern_list: newline_list pattern ')' compound_list
- { $$ = make_pattern_list ($2, $4); }
- | newline_list pattern ')' newline_list
- { $$ = make_pattern_list ($2, (COMMAND *)NULL); }
- | newline_list '(' pattern ')' compound_list
- { $$ = make_pattern_list ($3, $5); }
- | newline_list '(' pattern ')' newline_list
- { $$ = make_pattern_list ($3, (COMMAND *)NULL); }
- ;
-
-case_clause_sequence: pattern_list SEMI_SEMI
- { $$ = $1; }
- | case_clause_sequence pattern_list SEMI_SEMI
- { $2->next = $1; $$ = $2; }
- | pattern_list SEMI_AND
- { $1->flags |= CASEPAT_FALLTHROUGH; $$ = $1; }
- | case_clause_sequence pattern_list SEMI_AND
- { $2->flags |= CASEPAT_FALLTHROUGH; $2->next = $1; $$ = $2; }
- | pattern_list SEMI_SEMI_AND
- { $1->flags |= CASEPAT_TESTNEXT; $$ = $1; }
- | case_clause_sequence pattern_list SEMI_SEMI_AND
- { $2->flags |= CASEPAT_TESTNEXT; $2->next = $1; $$ = $2; }
- ;
-
-pattern: WORD
- { $$ = make_word_list ($1, (WORD_LIST *)NULL); }
- | pattern '|' WORD
- { $$ = make_word_list ($3, $1); }
- ;
-
-/* A list allows leading or trailing newlines and
- newlines as operators (equivalent to semicolons).
- It must end with a newline or semicolon.
- Lists are used within commands such as if, for, while. */
-
-list: newline_list list0
- {
- $$ = $2;
- if (need_here_doc)
- gather_here_documents ();
- }
- ;
-
-compound_list: list
- | newline_list list1
- {
- $$ = $2;
- }
- ;
-
-list0: list1 '\n' newline_list
- | list1 '&' newline_list
- {
- if ($1->type == cm_connection)
- $$ = connect_async_list ($1, (COMMAND *)NULL, '&');
- else
- $$ = command_connect ($1, (COMMAND *)NULL, '&');
- }
- | list1 ';' newline_list
-
- ;
-
-list1: list1 AND_AND newline_list list1
- { $$ = command_connect ($1, $4, AND_AND); }
- | list1 OR_OR newline_list list1
- { $$ = command_connect ($1, $4, OR_OR); }
- | list1 '&' newline_list list1
- {
- if ($1->type == cm_connection)
- $$ = connect_async_list ($1, $4, '&');
- else
- $$ = command_connect ($1, $4, '&');
- }
- | list1 ';' newline_list list1
- { $$ = command_connect ($1, $4, ';'); }
- | list1 '\n' newline_list list1
- { $$ = command_connect ($1, $4, ';'); }
- | pipeline_command
- { $$ = $1; }
- ;
-
-simple_list_terminator: '\n'
- | yacc_EOF
- ;
-
-list_terminator:'\n'
- { $$ = '\n'; }
- | ';'
- { $$ = ';'; }
- | yacc_EOF
- { $$ = yacc_EOF; }
- ;
-
-newline_list:
- | newline_list '\n'
- ;
-
-/* A simple_list is a list that contains no significant newlines
- and no leading or trailing newlines. Newlines are allowed
- only following operators, where they are not significant.
-
- This is what an inputunit consists of. */
-
-simple_list: simple_list1
- {
- $$ = $1;
- if (need_here_doc)
- gather_here_documents ();
- if ((parser_state & PST_CMDSUBST) && current_token == shell_eof_token)
- {
- global_command = $1;
- eof_encountered = 0;
- rewind_input_string ();
- YYACCEPT;
- }
- }
- | simple_list1 '&'
- {
- if ($1->type == cm_connection)
- $$ = connect_async_list ($1, (COMMAND *)NULL, '&');
- else
- $$ = command_connect ($1, (COMMAND *)NULL, '&');
- if (need_here_doc)
- gather_here_documents ();
- if ((parser_state & PST_CMDSUBST) && current_token == shell_eof_token)
- {
- global_command = $1;
- eof_encountered = 0;
- rewind_input_string ();
- YYACCEPT;
- }
- }
- | simple_list1 ';'
- {
- $$ = $1;
- if (need_here_doc)
- gather_here_documents ();
- if ((parser_state & PST_CMDSUBST) && current_token == shell_eof_token)
- {
- global_command = $1;
- eof_encountered = 0;
- rewind_input_string ();
- YYACCEPT;
- }
- }
- ;
-
-simple_list1: simple_list1 AND_AND newline_list simple_list1
- { $$ = command_connect ($1, $4, AND_AND); }
- | simple_list1 OR_OR newline_list simple_list1
- { $$ = command_connect ($1, $4, OR_OR); }
- | simple_list1 '&' simple_list1
- {
- if ($1->type == cm_connection)
- $$ = connect_async_list ($1, $3, '&');
- else
- $$ = command_connect ($1, $3, '&');
- }
- | simple_list1 ';' simple_list1
- { $$ = command_connect ($1, $3, ';'); }
-
- | pipeline_command
- { $$ = $1; }
- ;
-
-pipeline_command: pipeline
- { $$ = $1; }
- | BANG pipeline_command
- {
- if ($2)
- $2->flags ^= CMD_INVERT_RETURN; /* toggle */
- $$ = $2;
- }
- | timespec pipeline_command
- {
- if ($2)
- $2->flags |= $1;
- $$ = $2;
- }
- | timespec list_terminator
- {
- ELEMENT x;
-
- /* Boy, this is unclean. `time' by itself can
- time a null command. We cheat and push a
- newline back if the list_terminator was a newline
- to avoid the double-newline problem (one to
- terminate this, one to terminate the command) */
- x.word = 0;
- x.redirect = 0;
- $$ = make_simple_command (x, (COMMAND *)NULL);
- $$->flags |= $1;
- /* XXX - let's cheat and push a newline back */
- if ($2 == '\n')
- token_to_read = '\n';
- }
- | BANG list_terminator
- {
- ELEMENT x;
-
- /* This is just as unclean. Posix says that `!'
- by itself should be equivalent to `false'.
- We cheat and push a
- newline back if the list_terminator was a newline
- to avoid the double-newline problem (one to
- terminate this, one to terminate the command) */
- x.word = 0;
- x.redirect = 0;
- $$ = make_simple_command (x, (COMMAND *)NULL);
- $$->flags |= CMD_INVERT_RETURN;
- /* XXX - let's cheat and push a newline back */
- if ($2 == '\n')
- token_to_read = '\n';
- }
- ;
-
-pipeline: pipeline '|' newline_list pipeline
- { $$ = command_connect ($1, $4, '|'); }
- | pipeline BAR_AND newline_list pipeline
- {
- /* Make cmd1 |& cmd2 equivalent to cmd1 2>&1 | cmd2 */
- COMMAND *tc;
- REDIRECTEE rd, sd;
- REDIRECT *r;
-
- tc = $1->type == cm_simple ? (COMMAND *)$1->value.Simple : $1;
- sd.dest = 2;
- rd.dest = 1;
- r = make_redirection (sd, r_duplicating_output, rd, 0);
- if (tc->redirects)
- {
- register REDIRECT *t;
- for (t = tc->redirects; t->next; t = t->next)
- ;
- t->next = r;
- }
- else
- tc->redirects = r;
-
- $$ = command_connect ($1, $4, '|');
- }
- | command
- { $$ = $1; }
- ;
-
-timespec: TIME
- { $$ = CMD_TIME_PIPELINE; }
- | TIME TIMEOPT
- { $$ = CMD_TIME_PIPELINE|CMD_TIME_POSIX; }
- | TIME TIMEOPT TIMEIGN
- { $$ = CMD_TIME_PIPELINE|CMD_TIME_POSIX; }
- ;
-%%
-
-/* Initial size to allocate for tokens, and the
- amount to grow them by. */
-#define TOKEN_DEFAULT_INITIAL_SIZE 496
-#define TOKEN_DEFAULT_GROW_SIZE 512
-
-/* Should we call prompt_again? */
-#define SHOULD_PROMPT() \
- (interactive && (bash_input.type == st_stdin || bash_input.type == st_stream))
-
-#if defined (ALIAS)
-# define expanding_alias() (pushed_string_list && pushed_string_list->expander)
-#else
-# define expanding_alias() 0
-#endif
-
-/* Global var is non-zero when end of file has been reached. */
-int EOF_Reached = 0;
-
-#ifdef DEBUG
-static void
-debug_parser (i)
- int i;
-{
-#if YYDEBUG != 0
- yydebug = i;
-#endif
-}
-#endif
-
-/* yy_getc () returns the next available character from input or EOF.
- yy_ungetc (c) makes `c' the next character to read.
- init_yy_io (get, unget, type, location) makes the function GET the
- installed function for getting the next character, makes UNGET the
- installed function for un-getting a character, sets the type of stream
- (either string or file) from TYPE, and makes LOCATION point to where
- the input is coming from. */
-
-/* Unconditionally returns end-of-file. */
-int
-return_EOF ()
-{
- return (EOF);
-}
-
-/* Variable containing the current get and unget functions.
- See ./input.h for a clearer description. */
-BASH_INPUT bash_input;
-
-/* Set all of the fields in BASH_INPUT to NULL. Free bash_input.name if it
- is non-null, avoiding a memory leak. */
-void
-initialize_bash_input ()
-{
- bash_input.type = st_none;
- FREE (bash_input.name);
- bash_input.name = (char *)NULL;
- bash_input.location.file = (FILE *)NULL;
- bash_input.location.string = (char *)NULL;
- bash_input.getter = (sh_cget_func_t *)NULL;
- bash_input.ungetter = (sh_cunget_func_t *)NULL;
-}
-
-/* Set the contents of the current bash input stream from
- GET, UNGET, TYPE, NAME, and LOCATION. */
-void
-init_yy_io (get, unget, type, name, location)
- sh_cget_func_t *get;
- sh_cunget_func_t *unget;
- enum stream_type type;
- const char *name;
- INPUT_STREAM location;
-{
- bash_input.type = type;
- FREE (bash_input.name);
- bash_input.name = name ? savestring (name) : (char *)NULL;
-
- /* XXX */
-#if defined (CRAY)
- memcpy((char *)&bash_input.location.string, (char *)&location.string, sizeof(location));
-#else
- bash_input.location = location;
-#endif
- bash_input.getter = get;
- bash_input.ungetter = unget;
-}
-
-char *
-yy_input_name ()
-{
- return (bash_input.name ? bash_input.name : "stdin");
-}
-
-/* Call this to get the next character of input. */
-static int
-yy_getc ()
-{
- return (*(bash_input.getter)) ();
-}
-
-/* Call this to unget C. That is, to make C the next character
- to be read. */
-static int
-yy_ungetc (c)
- int c;
-{
- return (*(bash_input.ungetter)) (c);
-}
-
-#if defined (BUFFERED_INPUT)
-#ifdef INCLUDE_UNUSED
-int
-input_file_descriptor ()
-{
- switch (bash_input.type)
- {
- case st_stream:
- return (fileno (bash_input.location.file));
- case st_bstream:
- return (bash_input.location.buffered_fd);
- case st_stdin:
- default:
- return (fileno (stdin));
- }
-}
-#endif
-#endif /* BUFFERED_INPUT */
-
-/* **************************************************************** */
-/* */
-/* Let input be read from readline (). */
-/* */
-/* **************************************************************** */
-
-#if defined (READLINE)
-char *current_readline_prompt = (char *)NULL;
-char *current_readline_line = (char *)NULL;
-int current_readline_line_index = 0;
-
-static int
-yy_readline_get ()
-{
- SigHandler *old_sigint;
- int line_len;
- unsigned char c;
-
- if (!current_readline_line)
- {
- if (!bash_readline_initialized)
- initialize_readline ();
-
-#if defined (JOB_CONTROL)
- if (job_control)
- give_terminal_to (shell_pgrp, 0);
-#endif /* JOB_CONTROL */
-
- old_sigint = (SigHandler *)IMPOSSIBLE_TRAP_HANDLER;
- if (signal_is_ignored (SIGINT) == 0)
- {
- interrupt_immediately++;
- old_sigint = (SigHandler *)set_signal_handler (SIGINT, sigint_sighandler);
- }
-
- current_readline_line = readline (current_readline_prompt ?
- current_readline_prompt : "");
-
- CHECK_TERMSIG;
- if (signal_is_ignored (SIGINT) == 0)
- {
- interrupt_immediately--;
- if (old_sigint != IMPOSSIBLE_TRAP_HANDLER)
- set_signal_handler (SIGINT, old_sigint);
- }
-
-#if 0
- /* Reset the prompt to the decoded value of prompt_string_pointer. */
- reset_readline_prompt ();
-#endif
-
- if (current_readline_line == 0)
- return (EOF);
-
- current_readline_line_index = 0;
- line_len = strlen (current_readline_line);
-
- current_readline_line = (char *)xrealloc (current_readline_line, 2 + line_len);
- current_readline_line[line_len++] = '\n';
- current_readline_line[line_len] = '\0';
- }
-
- if (current_readline_line[current_readline_line_index] == 0)
- {
- free (current_readline_line);
- current_readline_line = (char *)NULL;
- return (yy_readline_get ());
- }
- else
- {
- c = current_readline_line[current_readline_line_index++];
- return (c);
- }
-}
-
-static int
-yy_readline_unget (c)
- int c;
-{
- if (current_readline_line_index && current_readline_line)
- current_readline_line[--current_readline_line_index] = c;
- return (c);
-}
-
-void
-with_input_from_stdin ()
-{
- INPUT_STREAM location;
-
- if (bash_input.type != st_stdin && stream_on_stack (st_stdin) == 0)
- {
- location.string = current_readline_line;
- init_yy_io (yy_readline_get, yy_readline_unget,
- st_stdin, "readline stdin", location);
- }
-}
-
-#else /* !READLINE */
-
-void
-with_input_from_stdin ()
-{
- with_input_from_stream (stdin, "stdin");
-}
-#endif /* !READLINE */
-
-/* **************************************************************** */
-/* */
-/* Let input come from STRING. STRING is zero terminated. */
-/* */
-/* **************************************************************** */
-
-static int
-yy_string_get ()
-{
- register char *string;
- register unsigned char c;
-
- string = bash_input.location.string;
-
- /* If the string doesn't exist, or is empty, EOF found. */
- if (string && *string)
- {
- c = *string++;
- bash_input.location.string = string;
- return (c);
- }
- else
- return (EOF);
-}
-
-static int
-yy_string_unget (c)
- int c;
-{
- *(--bash_input.location.string) = c;
- return (c);
-}
-
-void
-with_input_from_string (string, name)
- char *string;
- const char *name;
-{
- INPUT_STREAM location;
-
- location.string = string;
- init_yy_io (yy_string_get, yy_string_unget, st_string, name, location);
-}
-
-/* Count the number of characters we've consumed from bash_input.location.string
- and read into shell_input_line, but have not returned from shell_getc.
- That is the true input location. Rewind bash_input.location.string by
- that number of characters, so it points to the last character actually
- consumed by the parser. */
-static void
-rewind_input_string ()
-{
- int xchars;
-
- /* number of unconsumed characters in the input -- XXX need to take newlines
- into account, e.g., $(...\n) */
- xchars = shell_input_line_len - shell_input_line_index;
- if (bash_input.location.string[-1] == '\n')
- xchars++;
-
- /* XXX - how to reflect bash_input.location.string back to string passed to
- parse_and_execute or xparse_dolparen? xparse_dolparen needs to know how
- far into the string we parsed. parse_and_execute knows where bash_input.
- location.string is, and how far from orig_string that is -- that's the
- number of characters the command consumed. */
-
- /* bash_input.location.string - xchars should be where we parsed to */
- /* need to do more validation on xchars value for sanity -- test cases. */
- bash_input.location.string -= xchars;
-}
-
-/* **************************************************************** */
-/* */
-/* Let input come from STREAM. */
-/* */
-/* **************************************************************** */
-
-/* These two functions used to test the value of the HAVE_RESTARTABLE_SYSCALLS
- define, and just use getc/ungetc if it was defined, but since bash
- installs its signal handlers without the SA_RESTART flag, some signals
- (like SIGCHLD, SIGWINCH, etc.) received during a read(2) will not cause
- the read to be restarted. We need to restart it ourselves. */
-
-static int
-yy_stream_get ()
-{
- int result;
-
- result = EOF;
- if (bash_input.location.file)
- {
- if (interactive)
- interrupt_immediately++;
-
- /* XXX - don't need terminate_immediately; getc_with_restart checks
- for terminating signals itself if read returns < 0 */
- result = getc_with_restart (bash_input.location.file);
-
- if (interactive)
- interrupt_immediately--;
-
- }
- return (result);
-}
-
-static int
-yy_stream_unget (c)
- int c;
-{
- return (ungetc_with_restart (c, bash_input.location.file));
-}
-
-void
-with_input_from_stream (stream, name)
- FILE *stream;
- const char *name;
-{
- INPUT_STREAM location;
-
- location.file = stream;
- init_yy_io (yy_stream_get, yy_stream_unget, st_stream, name, location);
-}
-
-typedef struct stream_saver {
- struct stream_saver *next;
- BASH_INPUT bash_input;
- int line;
-#if defined (BUFFERED_INPUT)
- BUFFERED_STREAM *bstream;
-#endif /* BUFFERED_INPUT */
-} STREAM_SAVER;
-
-/* The globally known line number. */
-int line_number = 0;
-
-/* The line number offset set by assigning to LINENO. Not currently used. */
-int line_number_base = 0;
-
-#if defined (COND_COMMAND)
-static int cond_lineno;
-static int cond_token;
-#endif
-
-STREAM_SAVER *stream_list = (STREAM_SAVER *)NULL;
-
-void
-push_stream (reset_lineno)
- int reset_lineno;
-{
- STREAM_SAVER *saver = (STREAM_SAVER *)xmalloc (sizeof (STREAM_SAVER));
-
- xbcopy ((char *)&bash_input, (char *)&(saver->bash_input), sizeof (BASH_INPUT));
-
-#if defined (BUFFERED_INPUT)
- saver->bstream = (BUFFERED_STREAM *)NULL;
- /* If we have a buffered stream, clear out buffers[fd]. */
- if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0)
- saver->bstream = set_buffered_stream (bash_input.location.buffered_fd,
- (BUFFERED_STREAM *)NULL);
-#endif /* BUFFERED_INPUT */
-
- saver->line = line_number;
- bash_input.name = (char *)NULL;
- saver->next = stream_list;
- stream_list = saver;
- EOF_Reached = 0;
- if (reset_lineno)
- line_number = 0;
-}
-
-void
-pop_stream ()
-{
- if (!stream_list)
- EOF_Reached = 1;
- else
- {
- STREAM_SAVER *saver = stream_list;
-
- EOF_Reached = 0;
- stream_list = stream_list->next;
-
- init_yy_io (saver->bash_input.getter,
- saver->bash_input.ungetter,
- saver->bash_input.type,
- saver->bash_input.name,
- saver->bash_input.location);
-
-#if defined (BUFFERED_INPUT)
- /* If we have a buffered stream, restore buffers[fd]. */
- /* If the input file descriptor was changed while this was on the
- save stack, update the buffered fd to the new file descriptor and
- re-establish the buffer <-> bash_input fd correspondence. */
- if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0)
- {
- if (bash_input_fd_changed)
- {
- bash_input_fd_changed = 0;
- if (default_buffered_input >= 0)
- {
- bash_input.location.buffered_fd = default_buffered_input;
- saver->bstream->b_fd = default_buffered_input;
- SET_CLOSE_ON_EXEC (default_buffered_input);
- }
- }
- /* XXX could free buffered stream returned as result here. */
- set_buffered_stream (bash_input.location.buffered_fd, saver->bstream);
- }
-#endif /* BUFFERED_INPUT */
-
- line_number = saver->line;
-
- FREE (saver->bash_input.name);
- free (saver);
- }
-}
-
-/* Return 1 if a stream of type TYPE is saved on the stack. */
-int
-stream_on_stack (type)
- enum stream_type type;
-{
- register STREAM_SAVER *s;
-
- for (s = stream_list; s; s = s->next)
- if (s->bash_input.type == type)
- return 1;
- return 0;
-}
-
-/* Save the current token state and return it in a malloced array. */
-int *
-save_token_state ()
-{
- int *ret;
-
- ret = (int *)xmalloc (4 * sizeof (int));
- ret[0] = last_read_token;
- ret[1] = token_before_that;
- ret[2] = two_tokens_ago;
- ret[3] = current_token;
- return ret;
-}
-
-void
-restore_token_state (ts)
- int *ts;
-{
- if (ts == 0)
- return;
- last_read_token = ts[0];
- token_before_that = ts[1];
- two_tokens_ago = ts[2];
- current_token = ts[3];
-}
-
-/*
- * This is used to inhibit alias expansion and reserved word recognition
- * inside case statement pattern lists. A `case statement pattern list' is:
- *
- * everything between the `in' in a `case word in' and the next ')'
- * or `esac'
- * everything between a `;;' and the next `)' or `esac'
- */
-
-#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
-
-#define END_OF_ALIAS 0
-
-/*
- * Pseudo-global variables used in implementing token-wise alias expansion.
- */
-
-/*
- * Pushing and popping strings. This works together with shell_getc to
- * implement alias expansion on a per-token basis.
- */
-
-typedef struct string_saver {
- struct string_saver *next;
- int expand_alias; /* Value to set expand_alias to when string is popped. */
- char *saved_line;
-#if defined (ALIAS)
- alias_t *expander; /* alias that caused this line to be pushed. */
-#endif
- int saved_line_size, saved_line_index, saved_line_terminator;
-} STRING_SAVER;
-
-STRING_SAVER *pushed_string_list = (STRING_SAVER *)NULL;
-
-/*
- * Push the current shell_input_line onto a stack of such lines and make S
- * the current input. Used when expanding aliases. EXPAND is used to set
- * the value of expand_next_token when the string is popped, so that the
- * word after the alias in the original line is handled correctly when the
- * alias expands to multiple words. TOKEN is the token that was expanded
- * into S; it is saved and used to prevent infinite recursive expansion.
- */
-static void
-push_string (s, expand, ap)
- char *s;
- int expand;
- alias_t *ap;
-{
- STRING_SAVER *temp = (STRING_SAVER *)xmalloc (sizeof (STRING_SAVER));
-
- temp->expand_alias = expand;
- temp->saved_line = shell_input_line;
- temp->saved_line_size = shell_input_line_size;
- temp->saved_line_index = shell_input_line_index;
- temp->saved_line_terminator = shell_input_line_terminator;
-#if defined (ALIAS)
- temp->expander = ap;
-#endif
- temp->next = pushed_string_list;
- pushed_string_list = temp;
-
-#if defined (ALIAS)
- if (ap)
- ap->flags |= AL_BEINGEXPANDED;
-#endif
-
- shell_input_line = s;
- shell_input_line_size = strlen (s);
- shell_input_line_index = 0;
- shell_input_line_terminator = '\0';
-#if 0
- parser_state &= ~PST_ALEXPNEXT; /* XXX */
-#endif
-
- set_line_mbstate ();
-}
-
-/*
- * Make the top of the pushed_string stack be the current shell input.
- * Only called when there is something on the stack. Called from shell_getc
- * when it thinks it has consumed the string generated by an alias expansion
- * and needs to return to the original input line.
- */
-static void
-pop_string ()
-{
- STRING_SAVER *t;
-
- FREE (shell_input_line);
- shell_input_line = pushed_string_list->saved_line;
- shell_input_line_index = pushed_string_list->saved_line_index;
- shell_input_line_size = pushed_string_list->saved_line_size;
- shell_input_line_terminator = pushed_string_list->saved_line_terminator;
-
- if (pushed_string_list->expand_alias)
- parser_state |= PST_ALEXPNEXT;
- else
- parser_state &= ~PST_ALEXPNEXT;
-
- t = pushed_string_list;
- pushed_string_list = pushed_string_list->next;
-
-#if defined (ALIAS)
- if (t->expander)
- t->expander->flags &= ~AL_BEINGEXPANDED;
-#endif
-
- free ((char *)t);
-
- set_line_mbstate ();
-}
-
-static void
-free_string_list ()
-{
- register STRING_SAVER *t, *t1;
-
- for (t = pushed_string_list; t; )
- {
- t1 = t->next;
- FREE (t->saved_line);
-#if defined (ALIAS)
- if (t->expander)
- t->expander->flags &= ~AL_BEINGEXPANDED;
-#endif
- free ((char *)t);
- t = t1;
- }
- pushed_string_list = (STRING_SAVER *)NULL;
-}
-
-#endif /* ALIAS || DPAREN_ARITHMETIC */
-
-void
-free_pushed_string_input ()
-{
-#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
- free_string_list ();
-#endif
-}
-
-/* Return a line of text, taken from wherever yylex () reads input.
- If there is no more input, then we return NULL. If REMOVE_QUOTED_NEWLINE
- is non-zero, we remove unquoted \<newline> pairs. This is used by
- read_secondary_line to read here documents. */
-static char *
-read_a_line (remove_quoted_newline)
- int remove_quoted_newline;
-{
- static char *line_buffer = (char *)NULL;
- static int buffer_size = 0;
- int indx, c, peekc, pass_next;
-
-#if defined (READLINE)
- if (no_line_editing && SHOULD_PROMPT ())
-#else
- if (SHOULD_PROMPT ())
-#endif
- print_prompt ();
-
- pass_next = indx = 0;
- while (1)
- {
- /* Allow immediate exit if interrupted during input. */
- QUIT;
-
- c = yy_getc ();
-
- /* Ignore null bytes in input. */
- if (c == 0)
- {
-#if 0
- internal_warning ("read_a_line: ignored null byte in input");
-#endif
- continue;
- }
-
- /* If there is no more input, then we return NULL. */
- if (c == EOF)
- {
- if (interactive && bash_input.type == st_stream)
- clearerr (stdin);
- if (indx == 0)
- return ((char *)NULL);
- c = '\n';
- }
-
- /* `+2' in case the final character in the buffer is a newline. */
- RESIZE_MALLOCED_BUFFER (line_buffer, indx, 2, buffer_size, 128);
-
- /* IF REMOVE_QUOTED_NEWLINES is non-zero, we are reading a
- here document with an unquoted delimiter. In this case,
- the line will be expanded as if it were in double quotes.
- We allow a backslash to escape the next character, but we
- need to treat the backslash specially only if a backslash
- quoting a backslash-newline pair appears in the line. */
- if (pass_next)
- {
- line_buffer[indx++] = c;
- pass_next = 0;
- }
- else if (c == '\\' && remove_quoted_newline)
- {
- QUIT;
- peekc = yy_getc ();
- if (peekc == '\n')
- {
- line_number++;
- continue; /* Make the unquoted \<newline> pair disappear. */
- }
- else
- {
- yy_ungetc (peekc);
- pass_next = 1;
- line_buffer[indx++] = c; /* Preserve the backslash. */
- }
- }
- else
- line_buffer[indx++] = c;
-
- if (c == '\n')
- {
- line_buffer[indx] = '\0';
- return (line_buffer);
- }
- }
-}
-
-/* Return a line as in read_a_line (), but insure that the prompt is
- the secondary prompt. This is used to read the lines of a here
- document. REMOVE_QUOTED_NEWLINE is non-zero if we should remove
- newlines quoted with backslashes while reading the line. It is
- non-zero unless the delimiter of the here document was quoted. */
-char *
-read_secondary_line (remove_quoted_newline)
- int remove_quoted_newline;
-{
- char *ret;
- int n, c;
-
- prompt_string_pointer = &ps2_prompt;
- if (SHOULD_PROMPT())
- prompt_again ();
- ret = read_a_line (remove_quoted_newline);
-#if defined (HISTORY)
- if (ret && remember_on_history && (parser_state & PST_HEREDOC))
- {
- /* To make adding the the here-document body right, we need to rely
- on history_delimiting_chars() returning \n for the first line of
- the here-document body and the null string for the second and
- subsequent lines, so we avoid double newlines.
- current_command_line_count == 2 for the first line of the body. */
-
- current_command_line_count++;
- maybe_add_history (ret);
- }
-#endif /* HISTORY */
- return ret;
-}
-
-/* **************************************************************** */
-/* */
-/* YYLEX () */
-/* */
-/* **************************************************************** */
-
-/* Reserved words. These are only recognized as the first word of a
- command. */
-STRING_INT_ALIST word_token_alist[] = {
- { "if", IF },
- { "then", THEN },
- { "else", ELSE },
- { "elif", ELIF },
- { "fi", FI },
- { "case", CASE },
- { "esac", ESAC },
- { "for", FOR },
-#if defined (SELECT_COMMAND)
- { "select", SELECT },
-#endif
- { "while", WHILE },
- { "until", UNTIL },
- { "do", DO },
- { "done", DONE },
- { "in", IN },
- { "function", FUNCTION },
-#if defined (COMMAND_TIMING)
- { "time", TIME },
-#endif
- { "{", '{' },
- { "}", '}' },
- { "!", BANG },
-#if defined (COND_COMMAND)
- { "[[", COND_START },
- { "]]", COND_END },
-#endif
-#if defined (COPROCESS_SUPPORT)
- { "coproc", COPROC },
-#endif
- { (char *)NULL, 0}
-};
-
-/* other tokens that can be returned by read_token() */
-STRING_INT_ALIST other_token_alist[] = {
- /* Multiple-character tokens with special values */
- { "--", TIMEIGN },
- { "-p", TIMEOPT },
- { "&&", AND_AND },
- { "||", OR_OR },
- { ">>", GREATER_GREATER },
- { "<<", LESS_LESS },
- { "<&", LESS_AND },
- { ">&", GREATER_AND },
- { ";;", SEMI_SEMI },
- { ";&", SEMI_AND },
- { ";;&", SEMI_SEMI_AND },
- { "<<-", LESS_LESS_MINUS },
- { "<<<", LESS_LESS_LESS },
- { "&>", AND_GREATER },
- { "&>>", AND_GREATER_GREATER },
- { "<>", LESS_GREATER },
- { ">|", GREATER_BAR },
- { "|&", BAR_AND },
- { "EOF", yacc_EOF },
- /* Tokens whose value is the character itself */
- { ">", '>' },
- { "<", '<' },
- { "-", '-' },
- { "{", '{' },
- { "}", '}' },
- { ";", ';' },
- { "(", '(' },
- { ")", ')' },
- { "|", '|' },
- { "&", '&' },
- { "newline", '\n' },
- { (char *)NULL, 0}
-};
-
-/* others not listed here:
- WORD look at yylval.word
- ASSIGNMENT_WORD look at yylval.word
- NUMBER look at yylval.number
- ARITH_CMD look at yylval.word_list
- ARITH_FOR_EXPRS look at yylval.word_list
- COND_CMD look at yylval.command
-*/
-
-/* These are used by read_token_word, but appear up here so that shell_getc
- can use them to decide when to add otherwise blank lines to the history. */
-
-/* The primary delimiter stack. */
-struct dstack dstack = { (char *)NULL, 0, 0 };
-
-/* A temporary delimiter stack to be used when decoding prompt strings.
- This is needed because command substitutions in prompt strings (e.g., PS2)
- can screw up the parser's quoting state. */
-static struct dstack temp_dstack = { (char *)NULL, 0, 0 };
-
-/* Macro for accessing the top delimiter on the stack. Returns the
- delimiter or zero if none. */
-#define current_delimiter(ds) \
- (ds.delimiter_depth ? ds.delimiters[ds.delimiter_depth - 1] : 0)
-
-#define push_delimiter(ds, character) \
- do \
- { \
- if (ds.delimiter_depth + 2 > ds.delimiter_space) \
- ds.delimiters = (char *)xrealloc \
- (ds.delimiters, (ds.delimiter_space += 10) * sizeof (char)); \
- ds.delimiters[ds.delimiter_depth] = character; \
- ds.delimiter_depth++; \
- } \
- while (0)
-
-#define pop_delimiter(ds) ds.delimiter_depth--
-
-/* Return the next shell input character. This always reads characters
- from shell_input_line; when that line is exhausted, it is time to
- read the next line. This is called by read_token when the shell is
- processing normal command input. */
-
-/* This implements one-character lookahead/lookbehind across physical input
- lines, to avoid something being lost because it's pushed back with
- shell_ungetc when we're at the start of a line. */
-static int eol_ungetc_lookahead = 0;
-
-static int
-shell_getc (remove_quoted_newline)
- int remove_quoted_newline;
-{
- register int i;
- int c;
- unsigned char uc;
-
- QUIT;
-
- if (sigwinch_received)
- {
- sigwinch_received = 0;
- get_new_window_size (0, (int *)0, (int *)0);
- }
-
- if (eol_ungetc_lookahead)
- {
- c = eol_ungetc_lookahead;
- eol_ungetc_lookahead = 0;
- return (c);
- }
-
-#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
- /* If shell_input_line[shell_input_line_index] == 0, but there is
- something on the pushed list of strings, then we don't want to go
- off and get another line. We let the code down below handle it. */
-
- if (!shell_input_line || ((!shell_input_line[shell_input_line_index]) &&
- (pushed_string_list == (STRING_SAVER *)NULL)))
-#else /* !ALIAS && !DPAREN_ARITHMETIC */
- if (!shell_input_line || !shell_input_line[shell_input_line_index])
-#endif /* !ALIAS && !DPAREN_ARITHMETIC */
- {
- line_number++;
-
- restart_read:
-
- /* Allow immediate exit if interrupted during input. */
- QUIT;
-
- i = 0;
- shell_input_line_terminator = 0;
-
- /* If the shell is interatctive, but not currently printing a prompt
- (interactive_shell && interactive == 0), we don't want to print
- notifies or cleanup the jobs -- we want to defer it until we do
- print the next prompt. */
- if (interactive_shell == 0 || SHOULD_PROMPT())
- {
-#if defined (JOB_CONTROL)
- /* This can cause a problem when reading a command as the result
- of a trap, when the trap is called from flush_child. This call
- had better not cause jobs to disappear from the job table in
- that case, or we will have big trouble. */
- notify_and_cleanup ();
-#else /* !JOB_CONTROL */
- cleanup_dead_jobs ();
-#endif /* !JOB_CONTROL */
- }
-
-#if defined (READLINE)
- if (no_line_editing && SHOULD_PROMPT())
-#else
- if (SHOULD_PROMPT())
-#endif
- print_prompt ();
-
- if (bash_input.type == st_stream)
- clearerr (stdin);
-
- while (1)
- {
- c = yy_getc ();
-
- /* Allow immediate exit if interrupted during input. */
- QUIT;
-
- if (c == '\0')
- {
-#if 0
- internal_warning ("shell_getc: ignored null byte in input");
-#endif
- continue;
- }
-
- RESIZE_MALLOCED_BUFFER (shell_input_line, i, 2, shell_input_line_size, 256);
-
- if (c == EOF)
- {
- if (bash_input.type == st_stream)
- clearerr (stdin);
-
- if (i == 0)
- shell_input_line_terminator = EOF;
-
- shell_input_line[i] = '\0';
- break;
- }
-
- shell_input_line[i++] = c;
-
- if (c == '\n')
- {
- shell_input_line[--i] = '\0';
- current_command_line_count++;
- break;
- }
- }
-
- shell_input_line_index = 0;
- shell_input_line_len = i; /* == strlen (shell_input_line) */
-
- set_line_mbstate ();
-
-#if defined (HISTORY)
- if (remember_on_history && shell_input_line && shell_input_line[0])
- {
- char *expansions;
-# if defined (BANG_HISTORY)
- int old_hist;
-
- /* If the current delimiter is a single quote, we should not be
- performing history expansion, even if we're on a different
- line from the original single quote. */
- old_hist = history_expansion_inhibited;
- if (current_delimiter (dstack) == '\'')
- history_expansion_inhibited = 1;
-# endif
- expansions = pre_process_line (shell_input_line, 1, 1);
-# if defined (BANG_HISTORY)
- history_expansion_inhibited = old_hist;
-# endif
- if (expansions != shell_input_line)
- {
- free (shell_input_line);
- shell_input_line = expansions;
- shell_input_line_len = shell_input_line ?
- strlen (shell_input_line) : 0;
- if (shell_input_line_len == 0)
- current_command_line_count--;
-
- /* We have to force the xrealloc below because we don't know
- the true allocated size of shell_input_line anymore. */
- shell_input_line_size = shell_input_line_len;
-
- set_line_mbstate ();
- }
- }
- /* Try to do something intelligent with blank lines encountered while
- entering multi-line commands. XXX - this is grotesque */
- else if (remember_on_history && shell_input_line &&
- shell_input_line[0] == '\0' &&
- current_command_line_count > 1)
- {
- if (current_delimiter (dstack))
- /* We know shell_input_line[0] == 0 and we're reading some sort of
- quoted string. This means we've got a line consisting of only
- a newline in a quoted string. We want to make sure this line
- gets added to the history. */
- maybe_add_history (shell_input_line);
- else
- {
- char *hdcs;
- hdcs = history_delimiting_chars (shell_input_line);
- if (hdcs && hdcs[0] == ';')
- maybe_add_history (shell_input_line);
- }
- }
-
-#endif /* HISTORY */
-
- if (shell_input_line)
- {
- /* Lines that signify the end of the shell's input should not be
- echoed. */
- if (echo_input_at_read && (shell_input_line[0] ||
- shell_input_line_terminator != EOF))
- fprintf (stderr, "%s\n", shell_input_line);
- }
- else
- {
- shell_input_line_size = 0;
- prompt_string_pointer = ¤t_prompt_string;
- if (SHOULD_PROMPT ())
- prompt_again ();
- goto restart_read;
- }
-
- /* Add the newline to the end of this string, iff the string does
- not already end in an EOF character. */
- if (shell_input_line_terminator != EOF)
- {
- if (shell_input_line_len + 3 > shell_input_line_size)
- shell_input_line = (char *)xrealloc (shell_input_line,
- 1 + (shell_input_line_size += 2));
-
- shell_input_line[shell_input_line_len] = '\n';
- shell_input_line[shell_input_line_len + 1] = '\0';
-
- set_line_mbstate ();
- }
- }
-
-next_alias_char:
- uc = shell_input_line[shell_input_line_index];
-
- if (uc)
- shell_input_line_index++;
-
-#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
- /* If UC is NULL, we have reached the end of the current input string. If
- pushed_string_list is non-empty, it's time to pop to the previous string
- because we have fully consumed the result of the last alias expansion.
- Do it transparently; just return the next character of the string popped
- to. */
-pop_alias:
- if (uc == 0 && (pushed_string_list != (STRING_SAVER *)NULL))
- {
- pop_string ();
- uc = shell_input_line[shell_input_line_index];
- if (uc)
- shell_input_line_index++;
- }
-#endif /* ALIAS || DPAREN_ARITHMETIC */
-
- if MBTEST(uc == '\\' && remove_quoted_newline && shell_input_line[shell_input_line_index] == '\n')
- {
- if (SHOULD_PROMPT ())
- prompt_again ();
- line_number++;
- /* What do we do here if we're expanding an alias whose definition
- includes an escaped newline? If that's the last character in the
- alias expansion, we just pop the pushed string list (recall that
- we inhibit the appending of a space in mk_alexpansion() if newline
- is the last character). If it's not the last character, we need
- to consume the quoted newline and move to the next character in
- the expansion. */
- if (expanding_alias () && shell_input_line[shell_input_line_index+1] == '\0')
- {
- uc = 0;
- goto pop_alias;
- }
- else if (expanding_alias () && shell_input_line[shell_input_line_index+1] != '\0')
- {
- shell_input_line_index++; /* skip newline */
- goto next_alias_char; /* and get next character */
- }
- else
- goto restart_read;
- }
-
- if (uc == 0 && shell_input_line_terminator == EOF)
- return ((shell_input_line_index != 0) ? '\n' : EOF);
-
- return (uc);
-}
-
-/* Put C back into the input for the shell. This might need changes for
- HANDLE_MULTIBYTE around EOLs. Since we (currently) never push back a
- character different than we read, shell_input_line_property doesn't need
- to change when manipulating shell_input_line. The define for
- last_shell_getc_is_singlebyte should take care of it, though. */
-static void
-shell_ungetc (c)
- int c;
-{
- if (shell_input_line && shell_input_line_index)
- shell_input_line[--shell_input_line_index] = c;
- else
- eol_ungetc_lookahead = c;
-}
-
-#ifdef INCLUDE_UNUSED
-/* Back the input pointer up by one, effectively `ungetting' a character. */
-static void
-shell_ungetchar ()
-{
- if (shell_input_line && shell_input_line_index)
- shell_input_line_index--;
-}
-#endif
-
-/* Discard input until CHARACTER is seen, then push that character back
- onto the input stream. */
-static void
-discard_until (character)
- int character;
-{
- int c;
-
- while ((c = shell_getc (0)) != EOF && c != character)
- ;
-
- if (c != EOF)
- shell_ungetc (c);
-}
-
-void
-execute_variable_command (command, vname)
- char *command, *vname;
-{
- char *last_lastarg;
- sh_parser_state_t ps;
-
- save_parser_state (&ps);
- last_lastarg = get_string_value ("_");
- if (last_lastarg)
- last_lastarg = savestring (last_lastarg);
-
- parse_and_execute (savestring (command), vname, SEVAL_NONINT|SEVAL_NOHIST);
-
- restore_parser_state (&ps);
- bind_variable ("_", last_lastarg, 0);
- FREE (last_lastarg);
-
- if (token_to_read == '\n') /* reset_parser was called */
- token_to_read = 0;
-}
-
-/* Place to remember the token. We try to keep the buffer
- at a reasonable size, but it can grow. */
-static char *token = (char *)NULL;
-
-/* Current size of the token buffer. */
-static int token_buffer_size;
-
-/* Command to read_token () explaining what we want it to do. */
-#define READ 0
-#define RESET 1
-#define prompt_is_ps1 \
- (!prompt_string_pointer || prompt_string_pointer == &ps1_prompt)
-
-/* Function for yyparse to call. yylex keeps track of
- the last two tokens read, and calls read_token. */
-static int
-yylex ()
-{
- if (interactive && (current_token == 0 || current_token == '\n'))
- {
- /* Before we print a prompt, we might have to check mailboxes.
- We do this only if it is time to do so. Notice that only here
- is the mail alarm reset; nothing takes place in check_mail ()
- except the checking of mail. Please don't change this. */
- if (prompt_is_ps1 && time_to_check_mail ())
- {
- check_mail ();
- reset_mail_timer ();
- }
-
- /* Avoid printing a prompt if we're not going to read anything, e.g.
- after resetting the parser with read_token (RESET). */
- if (token_to_read == 0 && SHOULD_PROMPT ())
- prompt_again ();
- }
-
- two_tokens_ago = token_before_that;
- token_before_that = last_read_token;
- last_read_token = current_token;
- current_token = read_token (READ);
-
- if ((parser_state & PST_EOFTOKEN) && current_token == shell_eof_token)
- {
- current_token = yacc_EOF;
- if (bash_input.type == st_string)
- rewind_input_string ();
- }
- parser_state &= ~PST_EOFTOKEN;
-
- return (current_token);
-}
-
-/* When non-zero, we have read the required tokens
- which allow ESAC to be the next one read. */
-static int esacs_needed_count;
-
-void
-gather_here_documents ()
-{
- int r;
-
- r = 0;
- while (need_here_doc)
- {
- parser_state |= PST_HEREDOC;
- make_here_document (redir_stack[r++], line_number);
- parser_state &= ~PST_HEREDOC;
- need_here_doc--;
- }
-}
-
-/* When non-zero, an open-brace used to create a group is awaiting a close
- brace partner. */
-static int open_brace_count;
-
-#define command_token_position(token) \
- (((token) == ASSIGNMENT_WORD) || (parser_state&PST_REDIRLIST) || \
- ((token) != SEMI_SEMI && (token) != SEMI_AND && (token) != SEMI_SEMI_AND && reserved_word_acceptable(token)))
-
-#define assignment_acceptable(token) \
- (command_token_position(token) && ((parser_state & PST_CASEPAT) == 0))
-
-/* Check to see if TOKEN is a reserved word and return the token
- value if it is. */
-#define CHECK_FOR_RESERVED_WORD(tok) \
- do { \
- if (!dollar_present && !quoted && \
- reserved_word_acceptable (last_read_token)) \
- { \
- int i; \
- for (i = 0; word_token_alist[i].word != (char *)NULL; i++) \
- if (STREQ (tok, word_token_alist[i].word)) \
- { \
- if ((parser_state & PST_CASEPAT) && (word_token_alist[i].token != ESAC)) \
- break; \
- if (word_token_alist[i].token == TIME && time_command_acceptable () == 0) \
- break; \
- if (word_token_alist[i].token == ESAC) \
- parser_state &= ~(PST_CASEPAT|PST_CASESTMT); \
- else if (word_token_alist[i].token == CASE) \
- parser_state |= PST_CASESTMT; \
- else if (word_token_alist[i].token == COND_END) \
- parser_state &= ~(PST_CONDCMD|PST_CONDEXPR); \
- else if (word_token_alist[i].token == COND_START) \
- parser_state |= PST_CONDCMD; \
- else if (word_token_alist[i].token == '{') \
- open_brace_count++; \
- else if (word_token_alist[i].token == '}' && open_brace_count) \
- open_brace_count--; \
- return (word_token_alist[i].token); \
- } \
- } \
- } while (0)
-
-#if defined (ALIAS)
-
- /* OK, we have a token. Let's try to alias expand it, if (and only if)
- it's eligible.
-
- It is eligible for expansion if EXPAND_ALIASES is set, and
- the token is unquoted and the last token read was a command
- separator (or expand_next_token is set), and we are currently
- processing an alias (pushed_string_list is non-empty) and this
- token is not the same as the current or any previously
- processed alias.
-
- Special cases that disqualify:
- In a pattern list in a case statement (parser_state & PST_CASEPAT). */
-
-static char *
-mk_alexpansion (s)
- char *s;
-{
- int l;
- char *r;
-
- l = strlen (s);
- r = xmalloc (l + 2);
- strcpy (r, s);
- /* If the last character in the alias is a newline, don't add a trailing
- space to the expansion. Works with shell_getc above. */
- if (r[l - 1] != ' ' && r[l - 1] != '\n')
- r[l++] = ' ';
- r[l] = '\0';
- return r;
-}
-
-static int
-alias_expand_token (tokstr)
- char *tokstr;
-{
- char *expanded;
- alias_t *ap;
-
- if (((parser_state & PST_ALEXPNEXT) || command_token_position (last_read_token)) &&
- (parser_state & PST_CASEPAT) == 0)
- {
- ap = find_alias (tokstr);
-
- /* Currently expanding this token. */
- if (ap && (ap->flags & AL_BEINGEXPANDED))
- return (NO_EXPANSION);
-
- /* mk_alexpansion puts an extra space on the end of the alias expansion,
- so the lookahead by the parser works right. If this gets changed,
- make sure the code in shell_getc that deals with reaching the end of
- an expanded alias is changed with it. */
- expanded = ap ? mk_alexpansion (ap->value) : (char *)NULL;
-
- if (expanded)
- {
- push_string (expanded, ap->flags & AL_EXPANDNEXT, ap);
- return (RE_READ_TOKEN);
- }
- else
- /* This is an eligible token that does not have an expansion. */
- return (NO_EXPANSION);
- }
- return (NO_EXPANSION);
-}
-#endif /* ALIAS */
-
-static int
-time_command_acceptable ()
-{
-#if defined (COMMAND_TIMING)
- int i;
-
- if (posixly_correct && shell_compatibility_level > 41)
- {
- /* Quick check of the rest of the line to find the next token. If it
- begins with a `-', Posix says to not return `time' as the token.
- This was interp 267. */
- i = shell_input_line_index;
- while (i < shell_input_line_len && (shell_input_line[i] == ' ' || shell_input_line[i] == '\t'))
- i++;
- if (shell_input_line[i] == '-')
- return 0;
- }
-
- switch (last_read_token)
- {
- case 0:
- case ';':
- case '\n':
- case AND_AND:
- case OR_OR:
- case '&':
- case DO:
- case THEN:
- case ELSE:
- case '{': /* } */
- case '(': /* ) */
- case BANG: /* ! time pipeline */
- case TIME: /* time time pipeline */
- case TIMEOPT: /* time -p time pipeline */
- case TIMEIGN: /* time -p -- ... */
- return 1;
- default:
- return 0;
- }
-#else
- return 0;
-#endif /* COMMAND_TIMING */
-}
-
-/* Handle special cases of token recognition:
- IN is recognized if the last token was WORD and the token
- before that was FOR or CASE or SELECT.
-
- DO is recognized if the last token was WORD and the token
- before that was FOR or SELECT.
-
- ESAC is recognized if the last token caused `esacs_needed_count'
- to be set
-
- `{' is recognized if the last token as WORD and the token
- before that was FUNCTION, or if we just parsed an arithmetic
- `for' command.
-
- `}' is recognized if there is an unclosed `{' present.
-
- `-p' is returned as TIMEOPT if the last read token was TIME.
- `--' is returned as TIMEIGN if the last read token was TIMEOPT.
-
- ']]' is returned as COND_END if the parser is currently parsing
- a conditional expression ((parser_state & PST_CONDEXPR) != 0)
-
- `time' is returned as TIME if and only if it is immediately
- preceded by one of `;', `\n', `||', `&&', or `&'.
-*/
-
-static int
-special_case_tokens (tokstr)
- char *tokstr;
-{
- if ((last_read_token == WORD) &&
-#if defined (SELECT_COMMAND)
- ((token_before_that == FOR) || (token_before_that == CASE) || (token_before_that == SELECT)) &&
-#else
- ((token_before_that == FOR) || (token_before_that == CASE)) &&
-#endif
- (tokstr[0] == 'i' && tokstr[1] == 'n' && tokstr[2] == 0))
- {
- if (token_before_that == CASE)
- {
- parser_state |= PST_CASEPAT;
- esacs_needed_count++;
- }
- return (IN);
- }
-
- if (last_read_token == WORD &&
-#if defined (SELECT_COMMAND)
- (token_before_that == FOR || token_before_that == SELECT) &&
-#else
- (token_before_that == FOR) &&
-#endif
- (tokstr[0] == 'd' && tokstr[1] == 'o' && tokstr[2] == '\0'))
- return (DO);
-
- /* Ditto for ESAC in the CASE case.
- Specifically, this handles "case word in esac", which is a legal
- construct, certainly because someone will pass an empty arg to the
- case construct, and we don't want it to barf. Of course, we should
- insist that the case construct has at least one pattern in it, but
- the designers disagree. */
- if (esacs_needed_count)
- {
- esacs_needed_count--;
- if (STREQ (tokstr, "esac"))
- {
- parser_state &= ~PST_CASEPAT;
- return (ESAC);
- }
- }
-
- /* The start of a shell function definition. */
- if (parser_state & PST_ALLOWOPNBRC)
- {
- parser_state &= ~PST_ALLOWOPNBRC;
- if (tokstr[0] == '{' && tokstr[1] == '\0') /* } */
- {
- open_brace_count++;
- function_bstart = line_number;
- return ('{'); /* } */
- }
- }
-
- /* We allow a `do' after a for ((...)) without an intervening
- list_terminator */
- if (last_read_token == ARITH_FOR_EXPRS && tokstr[0] == 'd' && tokstr[1] == 'o' && !tokstr[2])
- return (DO);
- if (last_read_token == ARITH_FOR_EXPRS && tokstr[0] == '{' && tokstr[1] == '\0') /* } */
- {
- open_brace_count++;
- return ('{'); /* } */
- }
-
- if (open_brace_count && reserved_word_acceptable (last_read_token) && tokstr[0] == '}' && !tokstr[1])
- {
- open_brace_count--; /* { */
- return ('}');
- }
-
-#if defined (COMMAND_TIMING)
- /* Handle -p after `time'. */
- if (last_read_token == TIME && tokstr[0] == '-' && tokstr[1] == 'p' && !tokstr[2])
- return (TIMEOPT);
- /* Handle -- after `time -p'. */
- if (last_read_token == TIMEOPT && tokstr[0] == '-' && tokstr[1] == '-' && !tokstr[2])
- return (TIMEIGN);
-#endif
-
-#if defined (COND_COMMAND) /* [[ */
- if ((parser_state & PST_CONDEXPR) && tokstr[0] == ']' && tokstr[1] == ']' && tokstr[2] == '\0')
- return (COND_END);
-#endif
-
- return (-1);
-}
-
-/* Called from shell.c when Control-C is typed at top level. Or
- by the error rule at top level. */
-void
-reset_parser ()
-{
- dstack.delimiter_depth = 0; /* No delimiters found so far. */
- open_brace_count = 0;
-
-#if defined (EXTENDED_GLOB)
- /* Reset to global value of extended glob */
- if (parser_state & PST_EXTPAT)
- extended_glob = global_extglob;
-#endif
-
- parser_state = 0;
-
-#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
- if (pushed_string_list)
- free_string_list ();
-#endif /* ALIAS || DPAREN_ARITHMETIC */
-
- if (shell_input_line)
- {
- free (shell_input_line);
- shell_input_line = (char *)NULL;
- shell_input_line_size = shell_input_line_index = 0;
- }
-
- FREE (word_desc_to_read);
- word_desc_to_read = (WORD_DESC *)NULL;
-
- current_token = '\n'; /* XXX */
- last_read_token = '\n';
- token_to_read = '\n';
-}
-
-/* Read the next token. Command can be READ (normal operation) or
- RESET (to normalize state). */
-static int
-read_token (command)
- int command;
-{
- int character; /* Current character. */
- int peek_char; /* Temporary look-ahead character. */
- int result; /* The thing to return. */
-
- if (command == RESET)
- {
- reset_parser ();
- return ('\n');
- }
-
- if (token_to_read)
- {
- result = token_to_read;
- if (token_to_read == WORD || token_to_read == ASSIGNMENT_WORD)
- {
- yylval.word = word_desc_to_read;
- word_desc_to_read = (WORD_DESC *)NULL;
- }
- token_to_read = 0;
- return (result);
- }
-
-#if defined (COND_COMMAND)
- if ((parser_state & (PST_CONDCMD|PST_CONDEXPR)) == PST_CONDCMD)
- {
- cond_lineno = line_number;
- parser_state |= PST_CONDEXPR;
- yylval.command = parse_cond_command ();
- if (cond_token != COND_END)
- {
- cond_error ();
- return (-1);
- }
- token_to_read = COND_END;
- parser_state &= ~(PST_CONDEXPR|PST_CONDCMD);
- return (COND_CMD);
- }
-#endif
-
-#if defined (ALIAS)
- /* This is a place to jump back to once we have successfully expanded a
- token with an alias and pushed the string with push_string () */
- re_read_token:
-#endif /* ALIAS */
-
- /* Read a single word from input. Start by skipping blanks. */
- while ((character = shell_getc (1)) != EOF && shellblank (character))
- ;
-
- if (character == EOF)
- {
- EOF_Reached = 1;
- return (yacc_EOF);
- }
-
- if MBTEST(character == '#' && (!interactive || interactive_comments))
- {
- /* A comment. Discard until EOL or EOF, and then return a newline. */
- discard_until ('\n');
- shell_getc (0);
- character = '\n'; /* this will take the next if statement and return. */
- }
-
- if (character == '\n')
- {
- /* If we're about to return an unquoted newline, we can go and collect
- the text of any pending here document. */
- if (need_here_doc)
- gather_here_documents ();
-
-#if defined (ALIAS)
- parser_state &= ~PST_ALEXPNEXT;
-#endif /* ALIAS */
-
- parser_state &= ~PST_ASSIGNOK;
-
- return (character);
- }
-
- if (parser_state & PST_REGEXP)
- goto tokword;
-
- /* Shell meta-characters. */
- if MBTEST(shellmeta (character) && ((parser_state & PST_DBLPAREN) == 0))
- {
-#if defined (ALIAS)
- /* Turn off alias tokenization iff this character sequence would
- not leave us ready to read a command. */
- if (character == '<' || character == '>')
- parser_state &= ~PST_ALEXPNEXT;
-#endif /* ALIAS */
-
- parser_state &= ~PST_ASSIGNOK;
-
- peek_char = shell_getc (1);
- if (character == peek_char)
- {
- switch (character)
- {
- case '<':
- /* If '<' then we could be at "<<" or at "<<-". We have to
- look ahead one more character. */
- peek_char = shell_getc (1);
- if MBTEST(peek_char == '-')
- return (LESS_LESS_MINUS);
- else if MBTEST(peek_char == '<')
- return (LESS_LESS_LESS);
- else
- {
- shell_ungetc (peek_char);
- return (LESS_LESS);
- }
-
- case '>':
- return (GREATER_GREATER);
-
- case ';':
- parser_state |= PST_CASEPAT;
-#if defined (ALIAS)
- parser_state &= ~PST_ALEXPNEXT;
-#endif /* ALIAS */
-
- peek_char = shell_getc (1);
- if MBTEST(peek_char == '&')
- return (SEMI_SEMI_AND);
- else
- {
- shell_ungetc (peek_char);
- return (SEMI_SEMI);
- }
-
- case '&':
- return (AND_AND);
-
- case '|':
- return (OR_OR);
-
-#if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND)
- case '(': /* ) */
- result = parse_dparen (character);
- if (result == -2)
- break;
- else
- return result;
-#endif
- }
- }
- else if MBTEST(character == '<' && peek_char == '&')
- return (LESS_AND);
- else if MBTEST(character == '>' && peek_char == '&')
- return (GREATER_AND);
- else if MBTEST(character == '<' && peek_char == '>')
- return (LESS_GREATER);
- else if MBTEST(character == '>' && peek_char == '|')
- return (GREATER_BAR);
- else if MBTEST(character == '&' && peek_char == '>')
- {
- peek_char = shell_getc (1);
- if MBTEST(peek_char == '>')
- return (AND_GREATER_GREATER);
- else
- {
- shell_ungetc (peek_char);
- return (AND_GREATER);
- }
- }
- else if MBTEST(character == '|' && peek_char == '&')
- return (BAR_AND);
- else if MBTEST(character == ';' && peek_char == '&')
- {
- parser_state |= PST_CASEPAT;
-#if defined (ALIAS)
- parser_state &= ~PST_ALEXPNEXT;
-#endif /* ALIAS */
- return (SEMI_AND);
- }
-
- shell_ungetc (peek_char);
-
- /* If we look like we are reading the start of a function
- definition, then let the reader know about it so that
- we will do the right thing with `{'. */
- if MBTEST(character == ')' && last_read_token == '(' && token_before_that == WORD)
- {
- parser_state |= PST_ALLOWOPNBRC;
-#if defined (ALIAS)
- parser_state &= ~PST_ALEXPNEXT;
-#endif /* ALIAS */
- function_dstart = line_number;
- }
-
- /* case pattern lists may be preceded by an optional left paren. If
- we're not trying to parse a case pattern list, the left paren
- indicates a subshell. */
- if MBTEST(character == '(' && (parser_state & PST_CASEPAT) == 0) /* ) */
- parser_state |= PST_SUBSHELL;
- /*(*/
- else if MBTEST((parser_state & PST_CASEPAT) && character == ')')
- parser_state &= ~PST_CASEPAT;
- /*(*/
- else if MBTEST((parser_state & PST_SUBSHELL) && character == ')')
- parser_state &= ~PST_SUBSHELL;
-
-#if defined (PROCESS_SUBSTITUTION)
- /* Check for the constructs which introduce process substitution.
- Shells running in `posix mode' don't do process substitution. */
- if MBTEST(posixly_correct || ((character != '>' && character != '<') || peek_char != '(')) /*)*/
-#endif /* PROCESS_SUBSTITUTION */
- return (character);
- }
-
- /* Hack <&- (close stdin) case. Also <&N- (dup and close). */
- if MBTEST(character == '-' && (last_read_token == LESS_AND || last_read_token == GREATER_AND))
- return (character);
-
-tokword:
- /* Okay, if we got this far, we have to read a word. Read one,
- and then check it against the known ones. */
- result = read_token_word (character);
-#if defined (ALIAS)
- if (result == RE_READ_TOKEN)
- goto re_read_token;
-#endif
- return result;
-}
-
-/*
- * Match a $(...) or other grouping construct. This has to handle embedded
- * quoted strings ('', ``, "") and nested constructs. It also must handle
- * reprompting the user, if necessary, after reading a newline, and returning
- * correct error values if it reads EOF.
- */
-#define P_FIRSTCLOSE 0x0001
-#define P_ALLOWESC 0x0002
-#define P_DQUOTE 0x0004
-#define P_COMMAND 0x0008 /* parsing a command, so look for comments */
-#define P_BACKQUOTE 0x0010 /* parsing a backquoted command substitution */
-#define P_ARRAYSUB 0x0020 /* parsing a [...] array subscript for assignment */
-#define P_DOLBRACE 0x0040 /* parsing a ${...} construct */
-
-/* Lexical state while parsing a grouping construct or $(...). */
-#define LEX_WASDOL 0x001
-#define LEX_CKCOMMENT 0x002
-#define LEX_INCOMMENT 0x004
-#define LEX_PASSNEXT 0x008
-#define LEX_RESWDOK 0x010
-#define LEX_CKCASE 0x020
-#define LEX_INCASE 0x040
-#define LEX_INHEREDOC 0x080
-#define LEX_HEREDELIM 0x100 /* reading here-doc delimiter */
-#define LEX_STRIPDOC 0x200 /* <<- strip tabs from here doc delim */
-#define LEX_INWORD 0x400
-
-#define COMSUB_META(ch) ((ch) == ';' || (ch) == '&' || (ch) == '|')
-
-#define CHECK_NESTRET_ERROR() \
- do { \
- if (nestret == &matched_pair_error) \
- { \
- free (ret); \
- return &matched_pair_error; \
- } \
- } while (0)
-
-#define APPEND_NESTRET() \
- do { \
- if (nestlen) \
- { \
- RESIZE_MALLOCED_BUFFER (ret, retind, nestlen, retsize, 64); \
- strcpy (ret + retind, nestret); \
- retind += nestlen; \
- } \
- } while (0)
-
-static char matched_pair_error;
-
-static char *
-parse_matched_pair (qc, open, close, lenp, flags)
- int qc; /* `"' if this construct is within double quotes */
- int open, close;
- int *lenp, flags;
-{
- int count, ch, tflags;
- int nestlen, ttranslen, start_lineno;
- char *ret, *nestret, *ttrans;
- int retind, retsize, rflags;
- int dolbrace_state;
-
- dolbrace_state = (flags & P_DOLBRACE) ? DOLBRACE_PARAM : 0;
-
-/*itrace("parse_matched_pair[%d]: open = %c close = %c flags = %d", line_number, open, close, flags);*/
- count = 1;
- tflags = 0;
-
- if ((flags & P_COMMAND) && qc != '`' && qc != '\'' && qc != '"' && (flags & P_DQUOTE) == 0)
- tflags |= LEX_CKCOMMENT;
-
- /* RFLAGS is the set of flags we want to pass to recursive calls. */
- rflags = (qc == '"') ? P_DQUOTE : (flags & P_DQUOTE);
-
- ret = (char *)xmalloc (retsize = 64);
- retind = 0;
-
- start_lineno = line_number;
- while (count)
- {
- ch = shell_getc (qc != '\'' && (tflags & (LEX_PASSNEXT)) == 0);
-
- if (ch == EOF)
- {
- free (ret);
- parser_error (start_lineno, _("unexpected EOF while looking for matching `%c'"), close);
- EOF_Reached = 1; /* XXX */
- return (&matched_pair_error);
- }
-
- /* Possible reprompting. */
- if (ch == '\n' && SHOULD_PROMPT ())
- prompt_again ();
-
- /* Don't bother counting parens or doing anything else if in a comment
- or part of a case statement */
- if (tflags & LEX_INCOMMENT)
- {
- /* Add this character. */
- RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
- ret[retind++] = ch;
-
- if (ch == '\n')
- tflags &= ~LEX_INCOMMENT;
-
- continue;
- }
-
- /* Not exactly right yet, should handle shell metacharacters, too. If
- any changes are made to this test, make analogous changes to subst.c:
- extract_delimited_string(). */
- else if MBTEST((tflags & LEX_CKCOMMENT) && (tflags & LEX_INCOMMENT) == 0 && ch == '#' && (retind == 0 || ret[retind-1] == '\n' || shellblank (ret[retind - 1])))
- tflags |= LEX_INCOMMENT;
-
- if (tflags & LEX_PASSNEXT) /* last char was backslash */
- {
- tflags &= ~LEX_PASSNEXT;
- if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */
- {
- if (retind > 0)
- retind--; /* swallow previously-added backslash */
- continue;
- }
-
- RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
-#if 0
- if MBTEST(ch == CTLESC || ch == CTLNUL)
-#else
- if MBTEST(ch == CTLESC)
-#endif
- ret[retind++] = CTLESC;
- ret[retind++] = ch;
- continue;
- }
- /* If we're reparsing the input (e.g., from parse_string_to_word_list),
- we've already prepended CTLESC to single-quoted results of $'...'.
- We may want to do this for other CTLESC-quoted characters in
- reparse, too. */
- else if MBTEST((parser_state & PST_REPARSE) && open == '\'' && (ch == CTLESC || ch == CTLNUL))
- {
- RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
- ret[retind++] = ch;
- continue;
- }
- else if MBTEST(ch == CTLESC || ch == CTLNUL) /* special shell escapes */
- {
- RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
- ret[retind++] = CTLESC;
- ret[retind++] = ch;
- continue;
- }
- else if MBTEST(ch == close) /* ending delimiter */
- count--;
- /* handle nested ${...} specially. */
- else if MBTEST(open != close && (tflags & LEX_WASDOL) && open == '{' && ch == open) /* } */
- count++;
- else if MBTEST(((flags & P_FIRSTCLOSE) == 0) && ch == open) /* nested begin */
- count++;
-
- /* Add this character. */
- RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
- ret[retind++] = ch;
-
- /* If we just read the ending character, don't bother continuing. */
- if (count == 0)
- break;
-
- if (open == '\'') /* '' inside grouping construct */
- {
- if MBTEST((flags & P_ALLOWESC) && ch == '\\')
- tflags |= LEX_PASSNEXT;
- continue;
- }
-
- if MBTEST(ch == '\\') /* backslashes */
- tflags |= LEX_PASSNEXT;
-
- /* Based on which dolstate is currently in (param, op, or word),
- decide what the op is. We're really only concerned if it's % or
- #, so we can turn on a flag that says whether or not we should
- treat single quotes as special when inside a double-quoted
- ${...}. This logic must agree with subst.c:extract_dollar_brace_string
- since they share the same defines. */
- if (flags & P_DOLBRACE)
- {
- /* ${param%[%]word} */
- if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '%' && retind > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- /* ${param#[#]word} */
- else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '#' && retind > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- /* ${param/[/]pat/rep} */
- else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '/' && retind > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- /* ${param^[^]pat} */
- else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '^' && retind > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- /* ${param,[,]pat} */
- else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == ',' && retind > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if MBTEST(dolbrace_state == DOLBRACE_PARAM && strchr ("#%^,~:-=?+/", ch) != 0)
- dolbrace_state = DOLBRACE_OP;
- else if MBTEST(dolbrace_state == DOLBRACE_OP && strchr ("#%^,~:-=?+/", ch) == 0)
- dolbrace_state = DOLBRACE_WORD;
- }
-
- /* The big hammer. Single quotes aren't special in double quotes. The
- problem is that Posix used to say the single quotes are semi-special:
- within a double-quoted ${...} construct "an even number of
- unescaped double-quotes or single-quotes, if any, shall occur." */
- /* This was changed in Austin Group Interp 221 */
- if MBTEST(posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && (flags & P_DQUOTE) && (flags & P_DOLBRACE) && ch == '\'')
- continue;
-
- /* Could also check open == '`' if we want to parse grouping constructs
- inside old-style command substitution. */
- if (open != close) /* a grouping construct */
- {
- if MBTEST(shellquote (ch))
- {
- /* '', ``, or "" inside $(...) or other grouping construct. */
- push_delimiter (dstack, ch);
- if MBTEST((tflags & LEX_WASDOL) && ch == '\'') /* $'...' inside group */
- nestret = parse_matched_pair (ch, ch, ch, &nestlen, P_ALLOWESC|rflags);
- else
- nestret = parse_matched_pair (ch, ch, ch, &nestlen, rflags);
- pop_delimiter (dstack);
- CHECK_NESTRET_ERROR ();
-
- if MBTEST((tflags & LEX_WASDOL) && ch == '\'' && (extended_quote || (rflags & P_DQUOTE) == 0))
- {
- /* Translate $'...' here. */
- ttrans = ansiexpand (nestret, 0, nestlen - 1, &ttranslen);
- xfree (nestret);
-
- if ((rflags & P_DQUOTE) == 0)
- {
- nestret = sh_single_quote (ttrans);
- free (ttrans);
- nestlen = strlen (nestret);
- }
- else
- {
- nestret = ttrans;
- nestlen = ttranslen;
- }
- retind -= 2; /* back up before the $' */
- }
- else if MBTEST((tflags & LEX_WASDOL) && ch == '"' && (extended_quote || (rflags & P_DQUOTE) == 0))
- {
- /* Locale expand $"..." here. */
- ttrans = localeexpand (nestret, 0, nestlen - 1, start_lineno, &ttranslen);
- xfree (nestret);
-
- nestret = sh_mkdoublequoted (ttrans, ttranslen, 0);
- free (ttrans);
- nestlen = ttranslen + 2;
- retind -= 2; /* back up before the $" */
- }
-
- APPEND_NESTRET ();
- FREE (nestret);
- }
- else if ((flags & P_ARRAYSUB) && (tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */
- goto parse_dollar_word;
- }
- /* Parse an old-style command substitution within double quotes as a
- single word. */
- /* XXX - sh and ksh93 don't do this - XXX */
- else if MBTEST(open == '"' && ch == '`')
- {
- nestret = parse_matched_pair (0, '`', '`', &nestlen, rflags);
-
- CHECK_NESTRET_ERROR ();
- APPEND_NESTRET ();
-
- FREE (nestret);
- }
- else if MBTEST(open != '`' && (tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */
- /* check for $(), $[], or ${} inside quoted string. */
- {
-parse_dollar_word:
- if (open == ch) /* undo previous increment */
- count--;
- if (ch == '(') /* ) */
- nestret = parse_comsub (0, '(', ')', &nestlen, (rflags|P_COMMAND) & ~P_DQUOTE);
- else if (ch == '{') /* } */
- nestret = parse_matched_pair (0, '{', '}', &nestlen, P_FIRSTCLOSE|P_DOLBRACE|rflags);
- else if (ch == '[') /* ] */
- nestret = parse_matched_pair (0, '[', ']', &nestlen, rflags);
-
- CHECK_NESTRET_ERROR ();
- APPEND_NESTRET ();
-
- FREE (nestret);
- }
- if MBTEST(ch == '$')
- tflags |= LEX_WASDOL;
- else
- tflags &= ~LEX_WASDOL;
- }
-
- ret[retind] = '\0';
- if (lenp)
- *lenp = retind;
-/*itrace("parse_matched_pair[%d]: returning %s", line_number, ret);*/
- return ret;
-}
-
-/* Parse a $(...) command substitution. This is messier than I'd like, and
- reproduces a lot more of the token-reading code than I'd like. */
-static char *
-parse_comsub (qc, open, close, lenp, flags)
- int qc; /* `"' if this construct is within double quotes */
- int open, close;
- int *lenp, flags;
-{
- int count, ch, peekc, tflags, lex_rwlen, lex_wlen, lex_firstind;
- int nestlen, ttranslen, start_lineno;
- char *ret, *nestret, *ttrans, *heredelim;
- int retind, retsize, rflags, hdlen;
-
- /* Posix interp 217 says arithmetic expressions have precedence, so
- assume $(( introduces arithmetic expansion and parse accordingly. */
- peekc = shell_getc (0);
- shell_ungetc (peekc);
- if (peekc == '(')
- return (parse_matched_pair (qc, open, close, lenp, 0));
-
-/*itrace("parse_comsub: qc = `%c' open = %c close = %c", qc, open, close);*/
- count = 1;
- tflags = LEX_RESWDOK;
-
- if ((flags & P_COMMAND) && qc != '\'' && qc != '"' && (flags & P_DQUOTE) == 0)
- tflags |= LEX_CKCASE;
- if ((tflags & LEX_CKCASE) && (interactive == 0 || interactive_comments))
- tflags |= LEX_CKCOMMENT;
-
- /* RFLAGS is the set of flags we want to pass to recursive calls. */
- rflags = (flags & P_DQUOTE);
-
- ret = (char *)xmalloc (retsize = 64);
- retind = 0;
-
- start_lineno = line_number;
- lex_rwlen = lex_wlen = 0;
-
- heredelim = 0;
- lex_firstind = -1;
-
- while (count)
- {
-comsub_readchar:
- ch = shell_getc (qc != '\'' && (tflags & (LEX_INCOMMENT|LEX_PASSNEXT)) == 0);
-
- if (ch == EOF)
- {
-eof_error:
- free (ret);
- FREE (heredelim);
- parser_error (start_lineno, _("unexpected EOF while looking for matching `%c'"), close);
- EOF_Reached = 1; /* XXX */
- return (&matched_pair_error);
- }
-
- /* If we hit the end of a line and are reading the contents of a here
- document, and it's not the same line that the document starts on,
- check for this line being the here doc delimiter. Otherwise, if
- we're in a here document, mark the next character as the beginning
- of a line. */
- if (ch == '\n')
- {
- if ((tflags & LEX_HEREDELIM) && heredelim)
- {
- tflags &= ~LEX_HEREDELIM;
- tflags |= LEX_INHEREDOC;
- lex_firstind = retind + 1;
- }
- else if (tflags & LEX_INHEREDOC)
- {
- int tind;
- tind = lex_firstind;
- while ((tflags & LEX_STRIPDOC) && ret[tind] == '\t')
- tind++;
- if (STREQN (ret + tind, heredelim, hdlen))
- {
- tflags &= ~(LEX_STRIPDOC|LEX_INHEREDOC);
-/*itrace("parse_comsub:%d: found here doc end `%s'", line_number, ret + tind);*/
- free (heredelim);
- heredelim = 0;
- lex_firstind = -1;
- }
- else
- lex_firstind = retind + 1;
- }
- }
-
- /* Possible reprompting. */
- if (ch == '\n' && SHOULD_PROMPT ())
- prompt_again ();
-
- /* XXX -- possibly allow here doc to be delimited by ending right
- paren. */
- if ((tflags & LEX_INHEREDOC) && ch == close && count == 1)
- {
- int tind;
-/*itrace("parse_comsub: in here doc, ch == close, retind - firstind = %d hdlen = %d retind = %d", retind-lex_firstind, hdlen, retind);*/
- tind = lex_firstind;
- while ((tflags & LEX_STRIPDOC) && ret[tind] == '\t')
- tind++;
- if (retind-tind == hdlen && STREQN (ret + tind, heredelim, hdlen))
- {
- tflags &= ~(LEX_STRIPDOC|LEX_INHEREDOC);
-/*itrace("parse_comsub:%d: found here doc end `%s'", line_number, ret + tind);*/
- free (heredelim);
- heredelim = 0;
- lex_firstind = -1;
- }
- }
-
- /* Don't bother counting parens or doing anything else if in a comment */
- if (tflags & (LEX_INCOMMENT|LEX_INHEREDOC))
- {
- /* Add this character. */
- RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
- ret[retind++] = ch;
-
- if ((tflags & LEX_INCOMMENT) && ch == '\n')
-{
-/*itrace("parse_comsub:%d: lex_incomment -> 0 ch = `%c'", line_number, ch);*/
- tflags &= ~LEX_INCOMMENT;
-}
-
- continue;
- }
-
- if (tflags & LEX_PASSNEXT) /* last char was backslash */
- {
-/*itrace("parse_comsub:%d: lex_passnext -> 0 ch = `%c' (%d)", line_number, ch, __LINE__);*/
- tflags &= ~LEX_PASSNEXT;
- if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */
- {
- if (retind > 0)
- retind--; /* swallow previously-added backslash */
- continue;
- }
-
- RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
-#if 0
- if MBTEST(ch == CTLESC || ch == CTLNUL)
-#else
- if MBTEST(ch == CTLESC)
-#endif
- ret[retind++] = CTLESC;
- ret[retind++] = ch;
- continue;
- }
-
- /* If this is a shell break character, we are not in a word. If not,
- we either start or continue a word. */
- if MBTEST(shellbreak (ch))
- {
- tflags &= ~LEX_INWORD;
-/*itrace("parse_comsub:%d: lex_inword -> 0 ch = `%c' (%d)", line_number, ch, __LINE__);*/
- }
- else
- {
- if (tflags & LEX_INWORD)
- {
- lex_wlen++;
-/*itrace("parse_comsub:%d: lex_inword == 1 ch = `%c' lex_wlen = %d (%d)", line_number, ch, lex_wlen, __LINE__);*/
- }
- else
- {
-/*itrace("parse_comsub:%d: lex_inword -> 1 ch = `%c' (%d)", line_number, ch, __LINE__);*/
- tflags |= LEX_INWORD;
- lex_wlen = 0;
- }
- }
-
- /* Skip whitespace */
- if MBTEST(shellblank (ch) && (tflags & LEX_HEREDELIM) == 0 && lex_rwlen == 0)
- {
- /* Add this character. */
- RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
- ret[retind++] = ch;
- continue;
- }
-
- /* Either we are looking for the start of the here-doc delimiter
- (lex_firstind == -1) or we are reading one (lex_firstind >= 0).
- If this character is a shell break character and we are reading
- the delimiter, save it and note that we are now reading a here
- document. If we've found the start of the delimiter, note it by
- setting lex_firstind. Backslashes can quote shell metacharacters
- in here-doc delimiters. */
- if (tflags & LEX_HEREDELIM)
- {
- if (lex_firstind == -1 && shellbreak (ch) == 0)
- lex_firstind = retind;
-#if 0
- else if (heredelim && (tflags & LEX_PASSNEXT) == 0 && ch == '\n')
- {
- tflags |= LEX_INHEREDOC;
- tflags &= ~LEX_HEREDELIM;
- lex_firstind = retind + 1;
- }
-#endif
- else if (lex_firstind >= 0 && (tflags & LEX_PASSNEXT) == 0 && shellbreak (ch))
- {
- if (heredelim == 0)
- {
- nestret = substring (ret, lex_firstind, retind);
- heredelim = string_quote_removal (nestret, 0);
- free (nestret);
- hdlen = STRLEN(heredelim);
-/*itrace("parse_comsub:%d: found here doc delimiter `%s' (%d)", line_number, heredelim, hdlen);*/
- }
- if (ch == '\n')
- {
- tflags |= LEX_INHEREDOC;
- tflags &= ~LEX_HEREDELIM;
- lex_firstind = retind + 1;
- }
- else
- lex_firstind = -1;
- }
- }
-
- /* Meta-characters that can introduce a reserved word. Not perfect yet. */
- if MBTEST((tflags & LEX_RESWDOK) == 0 && (tflags & LEX_CKCASE) && (tflags & LEX_INCOMMENT) == 0 && (shellmeta(ch) || ch == '\n'))
- {
- /* Add this character. */
- RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
- ret[retind++] = ch;
- peekc = shell_getc (1);
- if (ch == peekc && (ch == '&' || ch == '|' || ch == ';')) /* two-character tokens */
- {
- RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
- ret[retind++] = peekc;
-/*itrace("parse_comsub:%d: set lex_reswordok = 1, ch = `%c'", line_number, ch);*/
- tflags |= LEX_RESWDOK;
- lex_rwlen = 0;
- continue;
- }
- else if (ch == '\n' || COMSUB_META(ch))
- {
- shell_ungetc (peekc);
-/*itrace("parse_comsub:%d: set lex_reswordok = 1, ch = `%c'", line_number, ch);*/
- tflags |= LEX_RESWDOK;
- lex_rwlen = 0;
- continue;
- }
- else if (ch == EOF)
- goto eof_error;
- else
- {
- /* `unget' the character we just added and fall through */
- retind--;
- shell_ungetc (peekc);
- }
- }
-
- /* If we can read a reserved word, try to read one. */
- if (tflags & LEX_RESWDOK)
- {
- if MBTEST(islower (ch))
- {
- /* Add this character. */
- RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
- ret[retind++] = ch;
- lex_rwlen++;
- continue;
- }
- else if MBTEST(lex_rwlen == 4 && shellbreak (ch))
- {
- if (STREQN (ret + retind - 4, "case", 4))
-{
- tflags |= LEX_INCASE;
-/*itrace("parse_comsub:%d: found `case', lex_incase -> 1 lex_reswdok -> 0", line_number);*/
-}
- else if (STREQN (ret + retind - 4, "esac", 4))
-{
- tflags &= ~LEX_INCASE;
-/*itrace("parse_comsub:%d: found `esac', lex_incase -> 0 lex_reswdok -> 0", line_number);*/
-}
- tflags &= ~LEX_RESWDOK;
- }
- else if MBTEST((tflags & LEX_CKCOMMENT) && ch == '#' && (lex_rwlen == 0 || ((tflags & LEX_INWORD) && lex_wlen == 0)))
- ; /* don't modify LEX_RESWDOK if we're starting a comment */
- else if MBTEST((tflags & LEX_INCASE) && ch != '\n')
- /* If we can read a reserved word and we're in case, we're at the
- point where we can read a new pattern list or an esac. We
- handle the esac case above. If we read a newline, we want to
- leave LEX_RESWDOK alone. If we read anything else, we want to
- turn off LEX_RESWDOK, since we're going to read a pattern list. */
-{
- tflags &= ~LEX_RESWDOK;
-/*itrace("parse_comsub:%d: lex_incase == 1 found `%c', lex_reswordok -> 0", line_number, ch);*/
-}
- else if MBTEST(shellbreak (ch) == 0)
-{
- tflags &= ~LEX_RESWDOK;
-/*itrace("parse_comsub:%d: found `%c', lex_reswordok -> 0", line_number, ch);*/
-}
- }
-
- /* Might be the start of a here-doc delimiter */
- if MBTEST((tflags & LEX_INCOMMENT) == 0 && (tflags & LEX_CKCASE) && ch == '<')
- {
- /* Add this character. */
- RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
- ret[retind++] = ch;
- peekc = shell_getc (1);
- if (peekc == EOF)
- goto eof_error;
- if (peekc == ch)
- {
- RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
- ret[retind++] = peekc;
- peekc = shell_getc (1);
- if (peekc == EOF)
- goto eof_error;
- if (peekc == '-')
- {
- RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
- ret[retind++] = peekc;
- tflags |= LEX_STRIPDOC;
- }
- else
- shell_ungetc (peekc);
- if (peekc != '<')
- {
- tflags |= LEX_HEREDELIM;
- lex_firstind = -1;
- }
- continue;
- }
- else
- ch = peekc; /* fall through and continue XXX */
- }
- else if MBTEST((tflags & LEX_CKCOMMENT) && (tflags & LEX_INCOMMENT) == 0 && ch == '#' && (((tflags & LEX_RESWDOK) && lex_rwlen == 0) || ((tflags & LEX_INWORD) && lex_wlen == 0)))
-{
-/*itrace("parse_comsub:%d: lex_incomment -> 1 (%d)", line_number, __LINE__);*/
- tflags |= LEX_INCOMMENT;
-}
-
- if MBTEST(ch == CTLESC || ch == CTLNUL) /* special shell escapes */
- {
- RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
- ret[retind++] = CTLESC;
- ret[retind++] = ch;
- continue;
- }
-#if 0
- else if MBTEST((tflags & LEX_INCASE) && ch == close && close == ')')
- tflags &= ~LEX_INCASE; /* XXX */
-#endif
- else if MBTEST(ch == close && (tflags & LEX_INCASE) == 0) /* ending delimiter */
-{
- count--;
-/*itrace("parse_comsub:%d: found close: count = %d", line_number, count);*/
-}
- else if MBTEST(((flags & P_FIRSTCLOSE) == 0) && (tflags & LEX_INCASE) == 0 && ch == open) /* nested begin */
-{
- count++;
-/*itrace("parse_comsub:%d: found open: count = %d", line_number, count);*/
-}
-
- /* Add this character. */
- RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
- ret[retind++] = ch;
-
- /* If we just read the ending character, don't bother continuing. */
- if (count == 0)
- break;
-
- if MBTEST(ch == '\\') /* backslashes */
- tflags |= LEX_PASSNEXT;
-
- if MBTEST(shellquote (ch))
- {
- /* '', ``, or "" inside $(...). */
- push_delimiter (dstack, ch);
- if MBTEST((tflags & LEX_WASDOL) && ch == '\'') /* $'...' inside group */
- nestret = parse_matched_pair (ch, ch, ch, &nestlen, P_ALLOWESC|rflags);
- else
- nestret = parse_matched_pair (ch, ch, ch, &nestlen, rflags);
- pop_delimiter (dstack);
- CHECK_NESTRET_ERROR ();
-
- if MBTEST((tflags & LEX_WASDOL) && ch == '\'' && (extended_quote || (rflags & P_DQUOTE) == 0))
- {
- /* Translate $'...' here. */
- ttrans = ansiexpand (nestret, 0, nestlen - 1, &ttranslen);
- xfree (nestret);
-
- if ((rflags & P_DQUOTE) == 0)
- {
- nestret = sh_single_quote (ttrans);
- free (ttrans);
- nestlen = strlen (nestret);
- }
- else
- {
- nestret = ttrans;
- nestlen = ttranslen;
- }
- retind -= 2; /* back up before the $' */
- }
- else if MBTEST((tflags & LEX_WASDOL) && ch == '"' && (extended_quote || (rflags & P_DQUOTE) == 0))
- {
- /* Locale expand $"..." here. */
- ttrans = localeexpand (nestret, 0, nestlen - 1, start_lineno, &ttranslen);
- xfree (nestret);
-
- nestret = sh_mkdoublequoted (ttrans, ttranslen, 0);
- free (ttrans);
- nestlen = ttranslen + 2;
- retind -= 2; /* back up before the $" */
- }
-
- APPEND_NESTRET ();
- FREE (nestret);
- }
- else if MBTEST((tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */
- /* check for $(), $[], or ${} inside command substitution. */
- {
- if ((tflags & LEX_INCASE) == 0 && open == ch) /* undo previous increment */
- count--;
- if (ch == '(') /* ) */
- nestret = parse_comsub (0, '(', ')', &nestlen, (rflags|P_COMMAND) & ~P_DQUOTE);
- else if (ch == '{') /* } */
- nestret = parse_matched_pair (0, '{', '}', &nestlen, P_FIRSTCLOSE|P_DOLBRACE|rflags);
- else if (ch == '[') /* ] */
- nestret = parse_matched_pair (0, '[', ']', &nestlen, rflags);
-
- CHECK_NESTRET_ERROR ();
- APPEND_NESTRET ();
-
- FREE (nestret);
- }
- if MBTEST(ch == '$')
- tflags |= LEX_WASDOL;
- else
- tflags &= ~LEX_WASDOL;
- }
-
- FREE (heredelim);
- ret[retind] = '\0';
- if (lenp)
- *lenp = retind;
-/*itrace("parse_comsub:%d: returning `%s'", line_number, ret);*/
- return ret;
-}
-
-/* Recursively call the parser to parse a $(...) command substitution. */
-char *
-xparse_dolparen (base, string, indp, flags)
- char *base;
- char *string;
- int *indp;
- int flags;
-{
- sh_parser_state_t ps;
- sh_input_line_state_t ls;
- int orig_ind, nc, sflags;
- char *ret, *s, *ep, *ostring;
-
- /*yydebug = 1;*/
- orig_ind = *indp;
- ostring = string;
-
-/*itrace("xparse_dolparen: size = %d shell_input_line = `%s'", shell_input_line_size, shell_input_line);*/
- sflags = SEVAL_NONINT|SEVAL_NOHIST|SEVAL_NOFREE;
- if (flags & SX_NOLONGJMP)
- sflags |= SEVAL_NOLONGJMP;
- save_parser_state (&ps);
- save_input_line_state (&ls);
-
- /*(*/
- parser_state |= PST_CMDSUBST|PST_EOFTOKEN; /* allow instant ')' */ /*(*/
- shell_eof_token = ')';
- parse_string (string, "command substitution", sflags, &ep);
-
- restore_parser_state (&ps);
- reset_parser ();
- /* reset_parser clears shell_input_line and associated variables */
- restore_input_line_state (&ls);
- if (interactive)
- token_to_read = 0;
-
- /* Need to find how many characters parse_and_execute consumed, update
- *indp, if flags != 0, copy the portion of the string parsed into RET
- and return it. If flags & 1 (EX_NOALLOC) we can return NULL. */
-
- /*(*/
- if (ep[-1] != ')')
- {
-#if DEBUG
- if (ep[-1] != '\n')
- itrace("xparse_dolparen:%d: ep[-1] != RPAREN (%d), ep = `%s'", line_number, ep[-1], ep);
-#endif
- while (ep > ostring && ep[-1] == '\n') ep--;
- }
-
- nc = ep - ostring;
- *indp = ep - base - 1;
-
- /*(*/
-#if DEBUG
- if (base[*indp] != ')')
- itrace("xparse_dolparen:%d: base[%d] != RPAREN (%d), base = `%s'", line_number, *indp, base[*indp], base);
-#endif
-
- if (flags & SX_NOALLOC)
- return (char *)NULL;
-
- if (nc == 0)
- {
- ret = xmalloc (1);
- ret[0] = '\0';
- }
- else
- ret = substring (ostring, 0, nc - 1);
-
- return ret;
-}
-
-#if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND)
-/* Parse a double-paren construct. It can be either an arithmetic
- command, an arithmetic `for' command, or a nested subshell. Returns
- the parsed token, -1 on error, or -2 if we didn't do anything and
- should just go on. */
-static int
-parse_dparen (c)
- int c;
-{
- int cmdtyp, sline;
- char *wval;
- WORD_DESC *wd;
-
-#if defined (ARITH_FOR_COMMAND)
- if (last_read_token == FOR)
- {
- arith_for_lineno = line_number;
- cmdtyp = parse_arith_cmd (&wval, 0);
- if (cmdtyp == 1)
- {
- wd = alloc_word_desc ();
- wd->word = wval;
- yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL);
- return (ARITH_FOR_EXPRS);
- }
- else
- return -1; /* ERROR */
- }
-#endif
-
-#if defined (DPAREN_ARITHMETIC)
- if (reserved_word_acceptable (last_read_token))
- {
- sline = line_number;
-
- cmdtyp = parse_arith_cmd (&wval, 0);
- if (cmdtyp == 1) /* arithmetic command */
- {
- wd = alloc_word_desc ();
- wd->word = wval;
- wd->flags = W_QUOTED|W_NOSPLIT|W_NOGLOB|W_DQUOTE;
- yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL);
- return (ARITH_CMD);
- }
- else if (cmdtyp == 0) /* nested subshell */
- {
- push_string (wval, 0, (alias_t *)NULL);
- if ((parser_state & PST_CASEPAT) == 0)
- parser_state |= PST_SUBSHELL;
- return (c);
- }
- else /* ERROR */
- return -1;
- }
-#endif
-
- return -2; /* XXX */
-}
-
-/* We've seen a `(('. Look for the matching `))'. If we get it, return 1.
- If not, assume it's a nested subshell for backwards compatibility and
- return 0. In any case, put the characters we've consumed into a locally-
- allocated buffer and make *ep point to that buffer. Return -1 on an
- error, for example EOF. */
-static int
-parse_arith_cmd (ep, adddq)
- char **ep;
- int adddq;
-{
- int exp_lineno, rval, c;
- char *ttok, *tokstr;
- int ttoklen;
-
- exp_lineno = line_number;
- ttok = parse_matched_pair (0, '(', ')', &ttoklen, 0);
- rval = 1;
- if (ttok == &matched_pair_error)
- return -1;
- /* Check that the next character is the closing right paren. If
- not, this is a syntax error. ( */
- c = shell_getc (0);
- if MBTEST(c != ')')
- rval = 0;
-
- tokstr = (char *)xmalloc (ttoklen + 4);
-
- /* if ADDDQ != 0 then (( ... )) -> "..." */
- if (rval == 1 && adddq) /* arith cmd, add double quotes */
- {
- tokstr[0] = '"';
- strncpy (tokstr + 1, ttok, ttoklen - 1);
- tokstr[ttoklen] = '"';
- tokstr[ttoklen+1] = '\0';
- }
- else if (rval == 1) /* arith cmd, don't add double quotes */
- {
- strncpy (tokstr, ttok, ttoklen - 1);
- tokstr[ttoklen-1] = '\0';
- }
- else /* nested subshell */
- {
- tokstr[0] = '(';
- strncpy (tokstr + 1, ttok, ttoklen - 1);
- tokstr[ttoklen] = ')';
- tokstr[ttoklen+1] = c;
- tokstr[ttoklen+2] = '\0';
- }
-
- *ep = tokstr;
- FREE (ttok);
- return rval;
-}
-#endif /* DPAREN_ARITHMETIC || ARITH_FOR_COMMAND */
-
-#if defined (COND_COMMAND)
-static void
-cond_error ()
-{
- char *etext;
-
- if (EOF_Reached && cond_token != COND_ERROR) /* [[ */
- parser_error (cond_lineno, _("unexpected EOF while looking for `]]'"));
- else if (cond_token != COND_ERROR)
- {
- if (etext = error_token_from_token (cond_token))
- {
- parser_error (cond_lineno, _("syntax error in conditional expression: unexpected token `%s'"), etext);
- free (etext);
- }
- else
- parser_error (cond_lineno, _("syntax error in conditional expression"));
- }
-}
-
-static COND_COM *
-cond_expr ()
-{
- return (cond_or ());
-}
-
-static COND_COM *
-cond_or ()
-{
- COND_COM *l, *r;
-
- l = cond_and ();
- if (cond_token == OR_OR)
- {
- r = cond_or ();
- l = make_cond_node (COND_OR, (WORD_DESC *)NULL, l, r);
- }
- return l;
-}
-
-static COND_COM *
-cond_and ()
-{
- COND_COM *l, *r;
-
- l = cond_term ();
- if (cond_token == AND_AND)
- {
- r = cond_and ();
- l = make_cond_node (COND_AND, (WORD_DESC *)NULL, l, r);
- }
- return l;
-}
-
-static int
-cond_skip_newlines ()
-{
- while ((cond_token = read_token (READ)) == '\n')
- {
- if (SHOULD_PROMPT ())
- prompt_again ();
- }
- return (cond_token);
-}
-
-#define COND_RETURN_ERROR() \
- do { cond_token = COND_ERROR; return ((COND_COM *)NULL); } while (0)
-
-static COND_COM *
-cond_term ()
-{
- WORD_DESC *op;
- COND_COM *term, *tleft, *tright;
- int tok, lineno;
- char *etext;
-
- /* Read a token. It can be a left paren, a `!', a unary operator, or a
- word that should be the first argument of a binary operator. Start by
- skipping newlines, since this is a compound command. */
- tok = cond_skip_newlines ();
- lineno = line_number;
- if (tok == COND_END)
- {
- COND_RETURN_ERROR ();
- }
- else if (tok == '(')
- {
- term = cond_expr ();
- if (cond_token != ')')
- {
- if (term)
- dispose_cond_node (term); /* ( */
- if (etext = error_token_from_token (cond_token))
- {
- parser_error (lineno, _("unexpected token `%s', expected `)'"), etext);
- free (etext);
- }
- else
- parser_error (lineno, _("expected `)'"));
- COND_RETURN_ERROR ();
- }
- term = make_cond_node (COND_EXPR, (WORD_DESC *)NULL, term, (COND_COM *)NULL);
- (void)cond_skip_newlines ();
- }
- else if (tok == BANG || (tok == WORD && (yylval.word->word[0] == '!' && yylval.word->word[1] == '\0')))
- {
- if (tok == WORD)
- dispose_word (yylval.word); /* not needed */
- term = cond_term ();
- if (term)
- term->flags |= CMD_INVERT_RETURN;
- }
- else if (tok == WORD && yylval.word->word[0] == '-' && yylval.word->word[2] == 0 && test_unop (yylval.word->word))
- {
- op = yylval.word;
- tok = read_token (READ);
- if (tok == WORD)
- {
- tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL);
- term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL);
- }
- else
- {
- dispose_word (op);
- if (etext = error_token_from_token (tok))
- {
- parser_error (line_number, _("unexpected argument `%s' to conditional unary operator"), etext);
- free (etext);
- }
- else
- parser_error (line_number, _("unexpected argument to conditional unary operator"));
- COND_RETURN_ERROR ();
- }
-
- (void)cond_skip_newlines ();
- }
- else if (tok == WORD) /* left argument to binary operator */
- {
- /* lhs */
- tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL);
-
- /* binop */
- tok = read_token (READ);
- if (tok == WORD && test_binop (yylval.word->word))
- {
- op = yylval.word;
- if (op->word[0] == '=' && (op->word[1] == '\0' || (op->word[1] == '=' && op->word[2] == '\0')))
- parser_state |= PST_EXTPAT;
- else if (op->word[0] == '!' && op->word[1] == '=' && op->word[2] == '\0')
- parser_state |= PST_EXTPAT;
- }
-#if defined (COND_REGEXP)
- else if (tok == WORD && STREQ (yylval.word->word, "=~"))
- {
- op = yylval.word;
- parser_state |= PST_REGEXP;
- }
-#endif
- else if (tok == '<' || tok == '>')
- op = make_word_from_token (tok); /* ( */
- /* There should be a check before blindly accepting the `)' that we have
- seen the opening `('. */
- else if (tok == COND_END || tok == AND_AND || tok == OR_OR || tok == ')')
- {
- /* Special case. [[ x ]] is equivalent to [[ -n x ]], just like
- the test command. Similarly for [[ x && expr ]] or
- [[ x || expr ]] or [[ (x) ]]. */
- op = make_word ("-n");
- term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL);
- cond_token = tok;
- return (term);
- }
- else
- {
- if (etext = error_token_from_token (tok))
- {
- parser_error (line_number, _("unexpected token `%s', conditional binary operator expected"), etext);
- free (etext);
- }
- else
- parser_error (line_number, _("conditional binary operator expected"));
- dispose_cond_node (tleft);
- COND_RETURN_ERROR ();
- }
-
- /* rhs */
- if (parser_state & PST_EXTPAT)
- extended_glob = 1;
- tok = read_token (READ);
- if (parser_state & PST_EXTPAT)
- extended_glob = global_extglob;
- parser_state &= ~(PST_REGEXP|PST_EXTPAT);
-
- if (tok == WORD)
- {
- tright = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL);
- term = make_cond_node (COND_BINARY, op, tleft, tright);
- }
- else
- {
- if (etext = error_token_from_token (tok))
- {
- parser_error (line_number, _("unexpected argument `%s' to conditional binary operator"), etext);
- free (etext);
- }
- else
- parser_error (line_number, _("unexpected argument to conditional binary operator"));
- dispose_cond_node (tleft);
- dispose_word (op);
- COND_RETURN_ERROR ();
- }
-
- (void)cond_skip_newlines ();
- }
- else
- {
- if (tok < 256)
- parser_error (line_number, _("unexpected token `%c' in conditional command"), tok);
- else if (etext = error_token_from_token (tok))
- {
- parser_error (line_number, _("unexpected token `%s' in conditional command"), etext);
- free (etext);
- }
- else
- parser_error (line_number, _("unexpected token %d in conditional command"), tok);
- COND_RETURN_ERROR ();
- }
- return (term);
-}
-
-/* This is kind of bogus -- we slip a mini recursive-descent parser in
- here to handle the conditional statement syntax. */
-static COMMAND *
-parse_cond_command ()
-{
- COND_COM *cexp;
-
- global_extglob = extended_glob;
- cexp = cond_expr ();
- return (make_cond_command (cexp));
-}
-#endif
-
-#if defined (ARRAY_VARS)
-/* When this is called, it's guaranteed that we don't care about anything
- in t beyond i. We do save and restore the chars, though. */
-static int
-token_is_assignment (t, i)
- char *t;
- int i;
-{
- unsigned char c, c1;
- int r;
-
- c = t[i]; c1 = t[i+1];
- t[i] = '='; t[i+1] = '\0';
- r = assignment (t, (parser_state & PST_COMPASSIGN) != 0);
- t[i] = c; t[i+1] = c1;
- return r;
-}
-
-/* XXX - possible changes here for `+=' */
-static int
-token_is_ident (t, i)
- char *t;
- int i;
-{
- unsigned char c;
- int r;
-
- c = t[i];
- t[i] = '\0';
- r = legal_identifier (t);
- t[i] = c;
- return r;
-}
-#endif
-
-static int
-read_token_word (character)
- int character;
-{
- /* The value for YYLVAL when a WORD is read. */
- WORD_DESC *the_word;
-
- /* Index into the token that we are building. */
- int token_index;
-
- /* ALL_DIGITS becomes zero when we see a non-digit. */
- int all_digit_token;
-
- /* DOLLAR_PRESENT becomes non-zero if we see a `$'. */
- int dollar_present;
-
- /* COMPOUND_ASSIGNMENT becomes non-zero if we are parsing a compound
- assignment. */
- int compound_assignment;
-
- /* QUOTED becomes non-zero if we see one of ("), ('), (`), or (\). */
- int quoted;
-
- /* Non-zero means to ignore the value of the next character, and just
- to add it no matter what. */
- int pass_next_character;
-
- /* The current delimiting character. */
- int cd;
- int result, peek_char;
- char *ttok, *ttrans;
- int ttoklen, ttranslen;
- intmax_t lvalue;
-
- if (token_buffer_size < TOKEN_DEFAULT_INITIAL_SIZE)
- token = (char *)xrealloc (token, token_buffer_size = TOKEN_DEFAULT_INITIAL_SIZE);
-
- token_index = 0;
- all_digit_token = DIGIT (character);
- dollar_present = quoted = pass_next_character = compound_assignment = 0;
-
- for (;;)
- {
- if (character == EOF)
- goto got_token;
-
- if (pass_next_character)
- {
- pass_next_character = 0;
- goto got_escaped_character;
- }
-
- cd = current_delimiter (dstack);
-
- /* Handle backslashes. Quote lots of things when not inside of
- double-quotes, quote some things inside of double-quotes. */
- if MBTEST(character == '\\')
- {
- peek_char = shell_getc (0);
-
- /* Backslash-newline is ignored in all cases except
- when quoted with single quotes. */
- if (peek_char == '\n')
- {
- character = '\n';
- goto next_character;
- }
- else
- {
- shell_ungetc (peek_char);
-
- /* If the next character is to be quoted, note it now. */
- if (cd == 0 || cd == '`' ||
- (cd == '"' && peek_char >= 0 && (sh_syntaxtab[peek_char] & CBSDQUOTE)))
- pass_next_character++;
-
- quoted = 1;
- goto got_character;
- }
- }
-
- /* Parse a matched pair of quote characters. */
- if MBTEST(shellquote (character))
- {
- push_delimiter (dstack, character);
- ttok = parse_matched_pair (character, character, character, &ttoklen, (character == '`') ? P_COMMAND : 0);
- pop_delimiter (dstack);
- if (ttok == &matched_pair_error)
- return -1; /* Bail immediately. */
- RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2,
- token_buffer_size, TOKEN_DEFAULT_GROW_SIZE);
- token[token_index++] = character;
- strcpy (token + token_index, ttok);
- token_index += ttoklen;
- all_digit_token = 0;
- quoted = 1;
- dollar_present |= (character == '"' && strchr (ttok, '$') != 0);
- FREE (ttok);
- goto next_character;
- }
-
-#ifdef COND_REGEXP
- /* When parsing a regexp as a single word inside a conditional command,
- we need to special-case characters special to both the shell and
- regular expressions. Right now, that is only '(' and '|'. */ /*)*/
- if MBTEST((parser_state & PST_REGEXP) && (character == '(' || character == '|')) /*)*/
- {
- if (character == '|')
- goto got_character;
-
- push_delimiter (dstack, character);
- ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0);
- pop_delimiter (dstack);
- if (ttok == &matched_pair_error)
- return -1; /* Bail immediately. */
- RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2,
- token_buffer_size, TOKEN_DEFAULT_GROW_SIZE);
- token[token_index++] = character;
- strcpy (token + token_index, ttok);
- token_index += ttoklen;
- FREE (ttok);
- dollar_present = all_digit_token = 0;
- goto next_character;
- }
-#endif /* COND_REGEXP */
-
-#ifdef EXTENDED_GLOB
- /* Parse a ksh-style extended pattern matching specification. */
- if MBTEST(extended_glob && PATTERN_CHAR (character))
- {
- peek_char = shell_getc (1);
- if MBTEST(peek_char == '(') /* ) */
- {
- push_delimiter (dstack, peek_char);
- ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0);
- pop_delimiter (dstack);
- if (ttok == &matched_pair_error)
- return -1; /* Bail immediately. */
- RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 3,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
- token[token_index++] = character;
- token[token_index++] = peek_char;
- strcpy (token + token_index, ttok);
- token_index += ttoklen;
- FREE (ttok);
- dollar_present = all_digit_token = 0;
- goto next_character;
- }
- else
- shell_ungetc (peek_char);
- }
-#endif /* EXTENDED_GLOB */
-
- /* If the delimiter character is not single quote, parse some of
- the shell expansions that must be read as a single word. */
- if (shellexp (character))
- {
- peek_char = shell_getc (1);
- /* $(...), <(...), >(...), $((...)), ${...}, and $[...] constructs */
- if MBTEST(peek_char == '(' ||
- ((peek_char == '{' || peek_char == '[') && character == '$')) /* ) ] } */
- {
- if (peek_char == '{') /* } */
- ttok = parse_matched_pair (cd, '{', '}', &ttoklen, P_FIRSTCLOSE|P_DOLBRACE);
- else if (peek_char == '(') /* ) */
- {
- /* XXX - push and pop the `(' as a delimiter for use by
- the command-oriented-history code. This way newlines
- appearing in the $(...) string get added to the
- history literally rather than causing a possibly-
- incorrect `;' to be added. ) */
- push_delimiter (dstack, peek_char);
- ttok = parse_comsub (cd, '(', ')', &ttoklen, P_COMMAND);
- pop_delimiter (dstack);
- }
- else
- ttok = parse_matched_pair (cd, '[', ']', &ttoklen, 0);
- if (ttok == &matched_pair_error)
- return -1; /* Bail immediately. */
- RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 3,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
- token[token_index++] = character;
- token[token_index++] = peek_char;
- strcpy (token + token_index, ttok);
- token_index += ttoklen;
- FREE (ttok);
- dollar_present = 1;
- all_digit_token = 0;
- goto next_character;
- }
- /* This handles $'...' and $"..." new-style quoted strings. */
- else if MBTEST(character == '$' && (peek_char == '\'' || peek_char == '"'))
- {
- int first_line;
-
- first_line = line_number;
- push_delimiter (dstack, peek_char);
- ttok = parse_matched_pair (peek_char, peek_char, peek_char,
- &ttoklen,
- (peek_char == '\'') ? P_ALLOWESC : 0);
- pop_delimiter (dstack);
- if (ttok == &matched_pair_error)
- return -1;
- if (peek_char == '\'')
- {
- ttrans = ansiexpand (ttok, 0, ttoklen - 1, &ttranslen);
- free (ttok);
-
- /* Insert the single quotes and correctly quote any
- embedded single quotes (allowed because P_ALLOWESC was
- passed to parse_matched_pair). */
- ttok = sh_single_quote (ttrans);
- free (ttrans);
- ttranslen = strlen (ttok);
- ttrans = ttok;
- }
- else
- {
- /* Try to locale-expand the converted string. */
- ttrans = localeexpand (ttok, 0, ttoklen - 1, first_line, &ttranslen);
- free (ttok);
-
- /* Add the double quotes back */
- ttok = sh_mkdoublequoted (ttrans, ttranslen, 0);
- free (ttrans);
- ttranslen += 2;
- ttrans = ttok;
- }
-
- RESIZE_MALLOCED_BUFFER (token, token_index, ttranslen + 1,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
- strcpy (token + token_index, ttrans);
- token_index += ttranslen;
- FREE (ttrans);
- quoted = 1;
- all_digit_token = 0;
- goto next_character;
- }
- /* This could eventually be extended to recognize all of the
- shell's single-character parameter expansions, and set flags.*/
- else if MBTEST(character == '$' && peek_char == '$')
- {
- RESIZE_MALLOCED_BUFFER (token, token_index, 3,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
- token[token_index++] = '$';
- token[token_index++] = peek_char;
- dollar_present = 1;
- all_digit_token = 0;
- goto next_character;
- }
- else
- shell_ungetc (peek_char);
- }
-
-#if defined (ARRAY_VARS)
- /* Identify possible array subscript assignment; match [...]. If
- parser_state&PST_COMPASSIGN, we need to parse [sub]=words treating
- `sub' as if it were enclosed in double quotes. */
- else if MBTEST(character == '[' && /* ] */
- ((token_index > 0 && assignment_acceptable (last_read_token) && token_is_ident (token, token_index)) ||
- (token_index == 0 && (parser_state&PST_COMPASSIGN))))
- {
- ttok = parse_matched_pair (cd, '[', ']', &ttoklen, P_ARRAYSUB);
- if (ttok == &matched_pair_error)
- return -1; /* Bail immediately. */
- RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
- token[token_index++] = character;
- strcpy (token + token_index, ttok);
- token_index += ttoklen;
- FREE (ttok);
- all_digit_token = 0;
- goto next_character;
- }
- /* Identify possible compound array variable assignment. */
- else if MBTEST(character == '=' && token_index > 0 && (assignment_acceptable (last_read_token) || (parser_state & PST_ASSIGNOK)) && token_is_assignment (token, token_index))
- {
- peek_char = shell_getc (1);
- if MBTEST(peek_char == '(') /* ) */
- {
- ttok = parse_compound_assignment (&ttoklen);
-
- RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 4,
- token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
-
- token[token_index++] = '=';
- token[token_index++] = '(';
- if (ttok)
- {
- strcpy (token + token_index, ttok);
- token_index += ttoklen;
- }
- token[token_index++] = ')';
- FREE (ttok);
- all_digit_token = 0;
- compound_assignment = 1;
-#if 1
- goto next_character;
-#else
- goto got_token; /* ksh93 seems to do this */
-#endif
- }
- else
- shell_ungetc (peek_char);
- }
-#endif
-
- /* When not parsing a multi-character word construct, shell meta-
- characters break words. */
- if MBTEST(shellbreak (character))
- {
- shell_ungetc (character);
- goto got_token;
- }
-
-got_character:
-
- if (character == CTLESC || character == CTLNUL)
- {
- RESIZE_MALLOCED_BUFFER (token, token_index, 2, token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
- token[token_index++] = CTLESC;
- }
- else
-got_escaped_character:
- RESIZE_MALLOCED_BUFFER (token, token_index, 1, token_buffer_size,
- TOKEN_DEFAULT_GROW_SIZE);
-
- token[token_index++] = character;
-
- all_digit_token &= DIGIT (character);
- dollar_present |= character == '$';
-
- next_character:
- if (character == '\n' && SHOULD_PROMPT ())
- prompt_again ();
-
- /* We want to remove quoted newlines (that is, a \<newline> pair)
- unless we are within single quotes or pass_next_character is
- set (the shell equivalent of literal-next). */
- cd = current_delimiter (dstack);
- character = shell_getc (cd != '\'' && pass_next_character == 0);
- } /* end for (;;) */
-
-got_token:
-
- /* Calls to RESIZE_MALLOCED_BUFFER ensure there is sufficient room. */
- token[token_index] = '\0';
-
- /* Check to see what thing we should return. If the last_read_token
- is a `<', or a `&', or the character which ended this token is
- a '>' or '<', then, and ONLY then, is this input token a NUMBER.
- Otherwise, it is just a word, and should be returned as such. */
- if MBTEST(all_digit_token && (character == '<' || character == '>' ||
- last_read_token == LESS_AND ||
- last_read_token == GREATER_AND))
- {
- if (legal_number (token, &lvalue) && (int)lvalue == lvalue)
- yylval.number = lvalue;
- else
- yylval.number = -1;
- return (NUMBER);
- }
-
- /* Check for special case tokens. */
- result = (last_shell_getc_is_singlebyte) ? special_case_tokens (token) : -1;
- if (result >= 0)
- return result;
-
-#if defined (ALIAS)
- /* Posix.2 does not allow reserved words to be aliased, so check for all
- of them, including special cases, before expanding the current token
- as an alias. */
- if MBTEST(posixly_correct)
- CHECK_FOR_RESERVED_WORD (token);
-
- /* Aliases are expanded iff EXPAND_ALIASES is non-zero, and quoting
- inhibits alias expansion. */
- if (expand_aliases && quoted == 0)
- {
- result = alias_expand_token (token);
- if (result == RE_READ_TOKEN)
- return (RE_READ_TOKEN);
- else if (result == NO_EXPANSION)
- parser_state &= ~PST_ALEXPNEXT;
- }
-
- /* If not in Posix.2 mode, check for reserved words after alias
- expansion. */
- if MBTEST(posixly_correct == 0)
-#endif
- CHECK_FOR_RESERVED_WORD (token);
-
- the_word = (WORD_DESC *)xmalloc (sizeof (WORD_DESC));
- the_word->word = (char *)xmalloc (1 + token_index);
- the_word->flags = 0;
- strcpy (the_word->word, token);
- if (dollar_present)
- the_word->flags |= W_HASDOLLAR;
- if (quoted)
- the_word->flags |= W_QUOTED; /*(*/
- if (compound_assignment && token[token_index-1] == ')')
- the_word->flags |= W_COMPASSIGN;
- /* A word is an assignment if it appears at the beginning of a
- simple command, or after another assignment word. This is
- context-dependent, so it cannot be handled in the grammar. */
- if (assignment (token, (parser_state & PST_COMPASSIGN) != 0))
- {
- the_word->flags |= W_ASSIGNMENT;
- /* Don't perform word splitting on assignment statements. */
- if (assignment_acceptable (last_read_token) || (parser_state & PST_COMPASSIGN) != 0)
- the_word->flags |= W_NOSPLIT;
- }
-
- if (command_token_position (last_read_token))
- {
- struct builtin *b;
- b = builtin_address_internal (token, 0);
- if (b && (b->flags & ASSIGNMENT_BUILTIN))
- parser_state |= PST_ASSIGNOK;
- else if (STREQ (token, "eval") || STREQ (token, "let"))
- parser_state |= PST_ASSIGNOK;
- }
-
- yylval.word = the_word;
-
- if (token[0] == '{' && token[token_index-1] == '}' &&
- (character == '<' || character == '>'))
- {
- /* can use token; already copied to the_word */
- token[token_index-1] = '\0';
- if (legal_identifier (token+1))
- {
- strcpy (the_word->word, token+1);
-/*itrace("read_token_word: returning REDIR_WORD for %s", the_word->word);*/
- return (REDIR_WORD);
- }
- }
-
- result = ((the_word->flags & (W_ASSIGNMENT|W_NOSPLIT)) == (W_ASSIGNMENT|W_NOSPLIT))
- ? ASSIGNMENT_WORD : WORD;
-
- switch (last_read_token)
- {
- case FUNCTION:
- parser_state |= PST_ALLOWOPNBRC;
- function_dstart = line_number;
- break;
- case CASE:
- case SELECT:
- case FOR:
- if (word_top < MAX_CASE_NEST)
- word_top++;
- word_lineno[word_top] = line_number;
- break;
- }
-
- return (result);
-}
-
-/* Return 1 if TOKSYM is a token that after being read would allow
- a reserved word to be seen, else 0. */
-static int
-reserved_word_acceptable (toksym)
- int toksym;
-{
- switch (toksym)
- {
- case '\n':
- case ';':
- case '(':
- case ')':
- case '|':
- case '&':
- case '{':
- case '}': /* XXX */
- case AND_AND:
- case BANG:
- case BAR_AND:
- case DO:
- case DONE:
- case ELIF:
- case ELSE:
- case ESAC:
- case FI:
- case IF:
- case OR_OR:
- case SEMI_SEMI:
- case SEMI_AND:
- case SEMI_SEMI_AND:
- case THEN:
- case TIME:
- case TIMEOPT:
- case TIMEIGN:
- case COPROC:
- case UNTIL:
- case WHILE:
- case 0:
- return 1;
- default:
-#if defined (COPROCESS_SUPPORT)
- if (last_read_token == WORD && token_before_that == COPROC)
- return 1;
-#endif
- if (last_read_token == WORD && token_before_that == FUNCTION)
- return 1;
- return 0;
- }
-}
-
-/* Return the index of TOKEN in the alist of reserved words, or -1 if
- TOKEN is not a shell reserved word. */
-int
-find_reserved_word (tokstr)
- char *tokstr;
-{
- int i;
- for (i = 0; word_token_alist[i].word; i++)
- if (STREQ (tokstr, word_token_alist[i].word))
- return i;
- return -1;
-}
-
-#if 0
-#if defined (READLINE)
-/* Called after each time readline is called. This insures that whatever
- the new prompt string is gets propagated to readline's local prompt
- variable. */
-static void
-reset_readline_prompt ()
-{
- char *temp_prompt;
-
- if (prompt_string_pointer)
- {
- temp_prompt = (*prompt_string_pointer)
- ? decode_prompt_string (*prompt_string_pointer)
- : (char *)NULL;
-
- if (temp_prompt == 0)
- {
- temp_prompt = (char *)xmalloc (1);
- temp_prompt[0] = '\0';
- }
-
- FREE (current_readline_prompt);
- current_readline_prompt = temp_prompt;
- }
-}
-#endif /* READLINE */
-#endif /* 0 */
-
-#if defined (HISTORY)
-/* A list of tokens which can be followed by newlines, but not by
- semi-colons. When concatenating multiple lines of history, the
- newline separator for such tokens is replaced with a space. */
-static const int no_semi_successors[] = {
- '\n', '{', '(', ')', ';', '&', '|',
- CASE, DO, ELSE, IF, SEMI_SEMI, SEMI_AND, SEMI_SEMI_AND, THEN, UNTIL,
- WHILE, AND_AND, OR_OR, IN,
- 0
-};
-
-/* If we are not within a delimited expression, try to be smart
- about which separators can be semi-colons and which must be
- newlines. Returns the string that should be added into the
- history entry. LINE is the line we're about to add; it helps
- make some more intelligent decisions in certain cases. */
-char *
-history_delimiting_chars (line)
- const char *line;
-{
- static int last_was_heredoc = 0; /* was the last entry the start of a here document? */
- register int i;
-
- if ((parser_state & PST_HEREDOC) == 0)
- last_was_heredoc = 0;
-
- if (dstack.delimiter_depth != 0)
- return ("\n");
-
- /* We look for current_command_line_count == 2 because we are looking to
- add the first line of the body of the here document (the second line
- of the command). We also keep LAST_WAS_HEREDOC as a private sentinel
- variable to note when we think we added the first line of a here doc
- (the one with a "<<" somewhere in it) */
- if (parser_state & PST_HEREDOC)
- {
- if (last_was_heredoc)
- {
- last_was_heredoc = 0;
- return "\n";
- }
- return (current_command_line_count == 2 ? "\n" : "");
- }
-
- /* First, handle some special cases. */
- /*(*/
- /* If we just read `()', assume it's a function definition, and don't
- add a semicolon. If the token before the `)' was not `(', and we're
- not in the midst of parsing a case statement, assume it's a
- parenthesized command and add the semicolon. */
- /*)(*/
- if (token_before_that == ')')
- {
- if (two_tokens_ago == '(') /*)*/ /* function def */
- return " ";
- /* This does not work for subshells inside case statement
- command lists. It's a suboptimal solution. */
- else if (parser_state & PST_CASESTMT) /* case statement pattern */
- return " ";
- else
- return "; "; /* (...) subshell */
- }
- else if (token_before_that == WORD && two_tokens_ago == FUNCTION)
- return " "; /* function def using `function name' without `()' */
-
- /* If we're not in a here document, but we think we're about to parse one,
- and we would otherwise return a `;', return a newline to delimit the
- line with the here-doc delimiter */
- else if ((parser_state & PST_HEREDOC) == 0 && current_command_line_count > 1 && last_read_token == '\n' && strstr (line, "<<"))
- {
- last_was_heredoc = 1;
- return "\n";
- }
-
- else if (token_before_that == WORD && two_tokens_ago == FOR)
- {
- /* Tricky. `for i\nin ...' should not have a semicolon, but
- `for i\ndo ...' should. We do what we can. */
- for (i = shell_input_line_index; whitespace (shell_input_line[i]); i++)
- ;
- if (shell_input_line[i] && shell_input_line[i] == 'i' && shell_input_line[i+1] == 'n')
- return " ";
- return ";";
- }
- else if (two_tokens_ago == CASE && token_before_that == WORD && (parser_state & PST_CASESTMT))
- return " ";
-
- for (i = 0; no_semi_successors[i]; i++)
- {
- if (token_before_that == no_semi_successors[i])
- return (" ");
- }
-
- return ("; ");
-}
-#endif /* HISTORY */
-
-/* Issue a prompt, or prepare to issue a prompt when the next character
- is read. */
-static void
-prompt_again ()
-{
- char *temp_prompt;
-
- if (interactive == 0 || expanding_alias ()) /* XXX */
- return;
-
- ps1_prompt = get_string_value ("PS1");
- ps2_prompt = get_string_value ("PS2");
-
- if (!prompt_string_pointer)
- prompt_string_pointer = &ps1_prompt;
-
- temp_prompt = *prompt_string_pointer
- ? decode_prompt_string (*prompt_string_pointer)
- : (char *)NULL;
-
- if (temp_prompt == 0)
- {
- temp_prompt = (char *)xmalloc (1);
- temp_prompt[0] = '\0';
- }
-
- current_prompt_string = *prompt_string_pointer;
- prompt_string_pointer = &ps2_prompt;
-
-#if defined (READLINE)
- if (!no_line_editing)
- {
- FREE (current_readline_prompt);
- current_readline_prompt = temp_prompt;
- }
- else
-#endif /* READLINE */
- {
- FREE (current_decoded_prompt);
- current_decoded_prompt = temp_prompt;
- }
-}
-
-int
-get_current_prompt_level ()
-{
- return ((current_prompt_string && current_prompt_string == ps2_prompt) ? 2 : 1);
-}
-
-void
-set_current_prompt_level (x)
- int x;
-{
- prompt_string_pointer = (x == 2) ? &ps2_prompt : &ps1_prompt;
- current_prompt_string = *prompt_string_pointer;
-}
-
-static void
-print_prompt ()
-{
- fprintf (stderr, "%s", current_decoded_prompt);
- fflush (stderr);
-}
-
-/* Return a string which will be printed as a prompt. The string
- may contain special characters which are decoded as follows:
-
- \a bell (ascii 07)
- \d the date in Day Mon Date format
- \e escape (ascii 033)
- \h the hostname up to the first `.'
- \H the hostname
- \j the number of active jobs
- \l the basename of the shell's tty device name
- \n CRLF
- \r CR
- \s the name of the shell
- \t the time in 24-hour hh:mm:ss format
- \T the time in 12-hour hh:mm:ss format
- \@ the time in 12-hour hh:mm am/pm format
- \A the time in 24-hour hh:mm format
- \D{fmt} the result of passing FMT to strftime(3)
- \u your username
- \v the version of bash (e.g., 2.00)
- \V the release of bash, version + patchlevel (e.g., 2.00.0)
- \w the current working directory
- \W the last element of $PWD
- \! the history number of this command
- \# the command number of this command
- \$ a $ or a # if you are root
- \nnn character code nnn in octal
- \\ a backslash
- \[ begin a sequence of non-printing chars
- \] end a sequence of non-printing chars
-*/
-#define PROMPT_GROWTH 48
-char *
-decode_prompt_string (string)
- char *string;
-{
- WORD_LIST *list;
- char *result, *t;
- struct dstack save_dstack;
- int last_exit_value, last_comsub_pid;
-#if defined (PROMPT_STRING_DECODE)
- int result_size, result_index;
- int c, n, i;
- char *temp, octal_string[4];
- struct tm *tm;
- time_t the_time;
- char timebuf[128];
- char *timefmt;
-
- result = (char *)xmalloc (result_size = PROMPT_GROWTH);
- result[result_index = 0] = 0;
- temp = (char *)NULL;
-
- while (c = *string++)
- {
- if (posixly_correct && c == '!')
- {
- if (*string == '!')
- {
- temp = savestring ("!");
- goto add_string;
- }
- else
- {
-#if !defined (HISTORY)
- temp = savestring ("1");
-#else /* HISTORY */
- temp = itos (history_number ());
-#endif /* HISTORY */
- string--; /* add_string increments string again. */
- goto add_string;
- }
- }
- if (c == '\\')
- {
- c = *string;
-
- switch (c)
- {
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- strncpy (octal_string, string, 3);
- octal_string[3] = '\0';
-
- n = read_octal (octal_string);
- temp = (char *)xmalloc (3);
-
- if (n == CTLESC || n == CTLNUL)
- {
- temp[0] = CTLESC;
- temp[1] = n;
- temp[2] = '\0';
- }
- else if (n == -1)
- {
- temp[0] = '\\';
- temp[1] = '\0';
- }
- else
- {
- temp[0] = n;
- temp[1] = '\0';
- }
-
- for (c = 0; n != -1 && c < 3 && ISOCTAL (*string); c++)
- string++;
-
- c = 0; /* tested at add_string: */
- goto add_string;
-
- case 'd':
- case 't':
- case 'T':
- case '@':
- case 'A':
- /* Make the current time/date into a string. */
- (void) time (&the_time);
-#if defined (HAVE_TZSET)
- sv_tz ("TZ"); /* XXX -- just make sure */
-#endif
- tm = localtime (&the_time);
-
- if (c == 'd')
- n = strftime (timebuf, sizeof (timebuf), "%a %b %d", tm);
- else if (c == 't')
- n = strftime (timebuf, sizeof (timebuf), "%H:%M:%S", tm);
- else if (c == 'T')
- n = strftime (timebuf, sizeof (timebuf), "%I:%M:%S", tm);
- else if (c == '@')
- n = strftime (timebuf, sizeof (timebuf), "%I:%M %p", tm);
- else if (c == 'A')
- n = strftime (timebuf, sizeof (timebuf), "%H:%M", tm);
-
- if (n == 0)
- timebuf[0] = '\0';
- else
- timebuf[sizeof(timebuf) - 1] = '\0';
-
- temp = savestring (timebuf);
- goto add_string;
-
- case 'D': /* strftime format */
- if (string[1] != '{') /* } */
- goto not_escape;
-
- (void) time (&the_time);
- tm = localtime (&the_time);
- string += 2; /* skip { */
- timefmt = xmalloc (strlen (string) + 3);
- for (t = timefmt; *string && *string != '}'; )
- *t++ = *string++;
- *t = '\0';
- c = *string; /* tested at add_string */
- if (timefmt[0] == '\0')
- {
- timefmt[0] = '%';
- timefmt[1] = 'X'; /* locale-specific current time */
- timefmt[2] = '\0';
- }
- n = strftime (timebuf, sizeof (timebuf), timefmt, tm);
- free (timefmt);
-
- if (n == 0)
- timebuf[0] = '\0';
- else
- timebuf[sizeof(timebuf) - 1] = '\0';
-
- if (promptvars || posixly_correct)
- /* Make sure that expand_prompt_string is called with a
- second argument of Q_DOUBLE_QUOTES if we use this
- function here. */
- temp = sh_backslash_quote_for_double_quotes (timebuf);
- else
- temp = savestring (timebuf);
- goto add_string;
-
- case 'n':
- temp = (char *)xmalloc (3);
- temp[0] = no_line_editing ? '\n' : '\r';
- temp[1] = no_line_editing ? '\0' : '\n';
- temp[2] = '\0';
- goto add_string;
-
- case 's':
- temp = base_pathname (shell_name);
- temp = savestring (temp);
- goto add_string;
-
- case 'v':
- case 'V':
- temp = (char *)xmalloc (16);
- if (c == 'v')
- strcpy (temp, dist_version);
- else
- sprintf (temp, "%s.%d", dist_version, patch_level);
- goto add_string;
-
- case 'w':
- case 'W':
- {
- /* Use the value of PWD because it is much more efficient. */
- char t_string[PATH_MAX];
- int tlen;
-
- temp = get_string_value ("PWD");
-
- if (temp == 0)
- {
- if (getcwd (t_string, sizeof(t_string)) == 0)
- {
- t_string[0] = '.';
- tlen = 1;
- }
- else
- tlen = strlen (t_string);
- }
- else
- {
- tlen = sizeof (t_string) - 1;
- strncpy (t_string, temp, tlen);
- }
- t_string[tlen] = '\0';
-
-#if defined (MACOSX)
- /* Convert from "fs" format to "input" format */
- temp = fnx_fromfs (t_string, strlen (t_string));
- if (temp != t_string)
- strcpy (t_string, temp);
-#endif
-
-#define ROOT_PATH(x) ((x)[0] == '/' && (x)[1] == 0)
-#define DOUBLE_SLASH_ROOT(x) ((x)[0] == '/' && (x)[1] == '/' && (x)[2] == 0)
- /* Abbreviate \W as ~ if $PWD == $HOME */
- if (c == 'W' && (((t = get_string_value ("HOME")) == 0) || STREQ (t, t_string) == 0))
- {
- if (ROOT_PATH (t_string) == 0 && DOUBLE_SLASH_ROOT (t_string) == 0)
- {
- t = strrchr (t_string, '/');
- if (t)
- memmove (t_string, t + 1, strlen (t)); /* strlen(t) to copy NULL */
- }
- }
-#undef ROOT_PATH
-#undef DOUBLE_SLASH_ROOT
- else
- /* polite_directory_format is guaranteed to return a string
- no longer than PATH_MAX - 1 characters. */
- strcpy (t_string, polite_directory_format (t_string));
-
- temp = trim_pathname (t_string, PATH_MAX - 1);
- /* If we're going to be expanding the prompt string later,
- quote the directory name. */
- if (promptvars || posixly_correct)
- /* Make sure that expand_prompt_string is called with a
- second argument of Q_DOUBLE_QUOTES if we use this
- function here. */
- temp = sh_backslash_quote_for_double_quotes (t_string);
- else
- temp = savestring (t_string);
-
- goto add_string;
- }
-
- case 'u':
- if (current_user.user_name == 0)
- get_current_user_info ();
- temp = savestring (current_user.user_name);
- goto add_string;
-
- case 'h':
- case 'H':
- temp = savestring (current_host_name);
- if (c == 'h' && (t = (char *)strchr (temp, '.')))
- *t = '\0';
- goto add_string;
-
- case '#':
- temp = itos (current_command_number);
- goto add_string;
-
- case '!':
-#if !defined (HISTORY)
- temp = savestring ("1");
-#else /* HISTORY */
- temp = itos (history_number ());
-#endif /* HISTORY */
- goto add_string;
-
- case '$':
- t = temp = (char *)xmalloc (3);
- if ((promptvars || posixly_correct) && (current_user.euid != 0))
- *t++ = '\\';
- *t++ = current_user.euid == 0 ? '#' : '$';
- *t = '\0';
- goto add_string;
-
- case 'j':
- temp = itos (count_all_jobs ());
- goto add_string;
-
- case 'l':
-#if defined (HAVE_TTYNAME)
- temp = (char *)ttyname (fileno (stdin));
- t = temp ? base_pathname (temp) : "tty";
- temp = savestring (t);
-#else
- temp = savestring ("tty");
-#endif /* !HAVE_TTYNAME */
- goto add_string;
-
-#if defined (READLINE)
- case '[':
- case ']':
- if (no_line_editing)
- {
- string++;
- break;
- }
- temp = (char *)xmalloc (3);
- n = (c == '[') ? RL_PROMPT_START_IGNORE : RL_PROMPT_END_IGNORE;
- i = 0;
- if (n == CTLESC || n == CTLNUL)
- temp[i++] = CTLESC;
- temp[i++] = n;
- temp[i] = '\0';
- goto add_string;
-#endif /* READLINE */
-
- case '\\':
- case 'a':
- case 'e':
- case 'r':
- temp = (char *)xmalloc (2);
- if (c == 'a')
- temp[0] = '\07';
- else if (c == 'e')
- temp[0] = '\033';
- else if (c == 'r')
- temp[0] = '\r';
- else /* (c == '\\') */
- temp[0] = c;
- temp[1] = '\0';
- goto add_string;
-
- default:
-not_escape:
- temp = (char *)xmalloc (3);
- temp[0] = '\\';
- temp[1] = c;
- temp[2] = '\0';
-
- add_string:
- if (c)
- string++;
- result =
- sub_append_string (temp, result, &result_index, &result_size);
- temp = (char *)NULL; /* Freed in sub_append_string (). */
- result[result_index] = '\0';
- break;
- }
- }
- else
- {
- RESIZE_MALLOCED_BUFFER (result, result_index, 3, result_size, PROMPT_GROWTH);
- result[result_index++] = c;
- result[result_index] = '\0';
- }
- }
-#else /* !PROMPT_STRING_DECODE */
- result = savestring (string);
-#endif /* !PROMPT_STRING_DECODE */
-
- /* Save the delimiter stack and point `dstack' to temp space so any
- command substitutions in the prompt string won't result in screwing
- up the parser's quoting state. */
- save_dstack = dstack;
- dstack = temp_dstack;
- dstack.delimiter_depth = 0;
-
- /* Perform variable and parameter expansion and command substitution on
- the prompt string. */
- if (promptvars || posixly_correct)
- {
- last_exit_value = last_command_exit_value;
- last_comsub_pid = last_command_subst_pid;
- list = expand_prompt_string (result, Q_DOUBLE_QUOTES, 0);
- free (result);
- result = string_list (list);
- dispose_words (list);
- last_command_exit_value = last_exit_value;
- last_command_subst_pid = last_comsub_pid;
- }
- else
- {
- t = dequote_string (result);
- free (result);
- result = t;
- }
-
- dstack = save_dstack;
-
- return (result);
-}
-
-/************************************************
- * *
- * ERROR HANDLING *
- * *
- ************************************************/
-
-/* Report a syntax error, and restart the parser. Call here for fatal
- errors. */
-int
-yyerror (msg)
- const char *msg;
-{
- report_syntax_error ((char *)NULL);
- reset_parser ();
- return (0);
-}
-
-static char *
-error_token_from_token (tok)
- int tok;
-{
- char *t;
-
- if (t = find_token_in_alist (tok, word_token_alist, 0))
- return t;
-
- if (t = find_token_in_alist (tok, other_token_alist, 0))
- return t;
-
- t = (char *)NULL;
- /* This stuff is dicy and needs closer inspection */
- switch (current_token)
- {
- case WORD:
- case ASSIGNMENT_WORD:
- if (yylval.word)
- t = savestring (yylval.word->word);
- break;
- case NUMBER:
- t = itos (yylval.number);
- break;
- case ARITH_CMD:
- if (yylval.word_list)
- t = string_list (yylval.word_list);
- break;
- case ARITH_FOR_EXPRS:
- if (yylval.word_list)
- t = string_list_internal (yylval.word_list, " ; ");
- break;
- case COND_CMD:
- t = (char *)NULL; /* punt */
- break;
- }
-
- return t;
-}
-
-static char *
-error_token_from_text ()
-{
- char *msg, *t;
- int token_end, i;
-
- t = shell_input_line;
- i = shell_input_line_index;
- token_end = 0;
- msg = (char *)NULL;
-
- if (i && t[i] == '\0')
- i--;
-
- while (i && (whitespace (t[i]) || t[i] == '\n'))
- i--;
-
- if (i)
- token_end = i + 1;
-
- while (i && (member (t[i], " \n\t;|&") == 0))
- i--;
-
- while (i != token_end && (whitespace (t[i]) || t[i] == '\n'))
- i++;
-
- /* Return our idea of the offending token. */
- if (token_end || (i == 0 && token_end == 0))
- {
- if (token_end)
- msg = substring (t, i, token_end);
- else /* one-character token */
- {
- msg = (char *)xmalloc (2);
- msg[0] = t[i];
- msg[1] = '\0';
- }
- }
-
- return (msg);
-}
-
-static void
-print_offending_line ()
-{
- char *msg;
- int token_end;
-
- msg = savestring (shell_input_line);
- token_end = strlen (msg);
- while (token_end && msg[token_end - 1] == '\n')
- msg[--token_end] = '\0';
-
- parser_error (line_number, "`%s'", msg);
- free (msg);
-}
-
-/* Report a syntax error with line numbers, etc.
- Call here for recoverable errors. If you have a message to print,
- then place it in MESSAGE, otherwise pass NULL and this will figure
- out an appropriate message for you. */
-static void
-report_syntax_error (message)
- char *message;
-{
- char *msg, *p;
-
- if (message)
- {
- parser_error (line_number, "%s", message);
- if (interactive && EOF_Reached)
- EOF_Reached = 0;
- last_command_exit_value = parse_and_execute_level ? EX_BADSYNTAX : EX_BADUSAGE;
- return;
- }
-
- /* If the line of input we're reading is not null, try to find the
- objectionable token. First, try to figure out what token the
- parser's complaining about by looking at current_token. */
- if (current_token != 0 && EOF_Reached == 0 && (msg = error_token_from_token (current_token)))
- {
- if (ansic_shouldquote (msg))
- {
- p = ansic_quote (msg, 0, NULL);
- free (msg);
- msg = p;
- }
- parser_error (line_number, _("syntax error near unexpected token `%s'"), msg);
- free (msg);
-
- if (interactive == 0)
- print_offending_line ();
-
- last_command_exit_value = parse_and_execute_level ? EX_BADSYNTAX : EX_BADUSAGE;
- return;
- }
-
- /* If looking at the current token doesn't prove fruitful, try to find the
- offending token by analyzing the text of the input line near the current
- input line index and report what we find. */
- if (shell_input_line && *shell_input_line)
- {
- msg = error_token_from_text ();
- if (msg)
- {
- parser_error (line_number, _("syntax error near `%s'"), msg);
- free (msg);
- }
-
- /* If not interactive, print the line containing the error. */
- if (interactive == 0)
- print_offending_line ();
- }
- else
- {
- msg = EOF_Reached ? _("syntax error: unexpected end of file") : _("syntax error");
- parser_error (line_number, "%s", msg);
- /* When the shell is interactive, this file uses EOF_Reached
- only for error reporting. Other mechanisms are used to
- decide whether or not to exit. */
- if (interactive && EOF_Reached)
- EOF_Reached = 0;
- }
-
- last_command_exit_value = parse_and_execute_level ? EX_BADSYNTAX : EX_BADUSAGE;
-}
-
-/* ??? Needed function. ??? We have to be able to discard the constructs
- created during parsing. In the case of error, we want to return
- allocated objects to the memory pool. In the case of no error, we want
- to throw away the information about where the allocated objects live.
- (dispose_command () will actually free the command.) */
-static void
-discard_parser_constructs (error_p)
- int error_p;
-{
-}
-
-/************************************************
- * *
- * EOF HANDLING *
- * *
- ************************************************/
-
-/* Do that silly `type "bye" to exit' stuff. You know, "ignoreeof". */
-
-/* A flag denoting whether or not ignoreeof is set. */
-int ignoreeof = 0;
-
-/* The number of times that we have encountered an EOF character without
- another character intervening. When this gets above the limit, the
- shell terminates. */
-int eof_encountered = 0;
-
-/* The limit for eof_encountered. */
-int eof_encountered_limit = 10;
-
-/* If we have EOF as the only input unit, this user wants to leave
- the shell. If the shell is not interactive, then just leave.
- Otherwise, if ignoreeof is set, and we haven't done this the
- required number of times in a row, print a message. */
-static void
-handle_eof_input_unit ()
-{
- if (interactive)
- {
- /* shell.c may use this to decide whether or not to write out the
- history, among other things. We use it only for error reporting
- in this file. */
- if (EOF_Reached)
- EOF_Reached = 0;
-
- /* If the user wants to "ignore" eof, then let her do so, kind of. */
- if (ignoreeof)
- {
- if (eof_encountered < eof_encountered_limit)
- {
- fprintf (stderr, _("Use \"%s\" to leave the shell.\n"),
- login_shell ? "logout" : "exit");
- eof_encountered++;
- /* Reset the parsing state. */
- last_read_token = current_token = '\n';
- /* Reset the prompt string to be $PS1. */
- prompt_string_pointer = (char **)NULL;
- prompt_again ();
- return;
- }
- }
-
- /* In this case EOF should exit the shell. Do it now. */
- reset_parser ();
- exit_builtin ((WORD_LIST *)NULL);
- }
- else
- {
- /* We don't write history files, etc., for non-interactive shells. */
- EOF_Reached = 1;
- }
-}
-
-/************************************************
- * *
- * STRING PARSING FUNCTIONS *
- * *
- ************************************************/
-
-/* It's very important that these two functions treat the characters
- between ( and ) identically. */
-
-static WORD_LIST parse_string_error;
-
-/* Take a string and run it through the shell parser, returning the
- resultant word list. Used by compound array assignment. */
-WORD_LIST *
-parse_string_to_word_list (s, flags, whom)
- char *s;
- int flags;
- const char *whom;
-{
- WORD_LIST *wl;
- int tok, orig_current_token, orig_line_number, orig_input_terminator;
- int orig_line_count;
- int old_echo_input, old_expand_aliases;
-#if defined (HISTORY)
- int old_remember_on_history, old_history_expansion_inhibited;
-#endif
-
-#if defined (HISTORY)
- old_remember_on_history = remember_on_history;
-# if defined (BANG_HISTORY)
- old_history_expansion_inhibited = history_expansion_inhibited;
-# endif
- bash_history_disable ();
-#endif
-
- orig_line_number = line_number;
- orig_line_count = current_command_line_count;
- orig_input_terminator = shell_input_line_terminator;
- old_echo_input = echo_input_at_read;
- old_expand_aliases = expand_aliases;
-
- push_stream (1);
- last_read_token = WORD; /* WORD to allow reserved words here */
- current_command_line_count = 0;
- echo_input_at_read = expand_aliases = 0;
-
- with_input_from_string (s, whom);
- wl = (WORD_LIST *)NULL;
-
- if (flags & 1)
- parser_state |= PST_COMPASSIGN|PST_REPARSE;
-
- while ((tok = read_token (READ)) != yacc_EOF)
- {
- if (tok == '\n' && *bash_input.location.string == '\0')
- break;
- if (tok == '\n') /* Allow newlines in compound assignments */
- continue;
- if (tok != WORD && tok != ASSIGNMENT_WORD)
- {
- line_number = orig_line_number + line_number - 1;
- orig_current_token = current_token;
- current_token = tok;
- yyerror (NULL); /* does the right thing */
- current_token = orig_current_token;
- if (wl)
- dispose_words (wl);
- wl = &parse_string_error;
- break;
- }
- wl = make_word_list (yylval.word, wl);
- }
-
- last_read_token = '\n';
- pop_stream ();
-
-#if defined (HISTORY)
- remember_on_history = old_remember_on_history;
-# if defined (BANG_HISTORY)
- history_expansion_inhibited = old_history_expansion_inhibited;
-# endif /* BANG_HISTORY */
-#endif /* HISTORY */
-
- echo_input_at_read = old_echo_input;
- expand_aliases = old_expand_aliases;
-
- current_command_line_count = orig_line_count;
- shell_input_line_terminator = orig_input_terminator;
-
- if (flags & 1)
- parser_state &= ~(PST_COMPASSIGN|PST_REPARSE);
-
- if (wl == &parse_string_error)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- if (interactive_shell == 0 && posixly_correct)
- jump_to_top_level (FORCE_EOF);
- else
- jump_to_top_level (DISCARD);
- }
-
- return (REVERSE_LIST (wl, WORD_LIST *));
-}
-
-static char *
-parse_compound_assignment (retlenp)
- int *retlenp;
-{
- WORD_LIST *wl, *rl;
- int tok, orig_line_number, orig_token_size, orig_last_token, assignok;
- char *saved_token, *ret;
-
- saved_token = token;
- orig_token_size = token_buffer_size;
- orig_line_number = line_number;
- orig_last_token = last_read_token;
-
- last_read_token = WORD; /* WORD to allow reserved words here */
-
- token = (char *)NULL;
- token_buffer_size = 0;
-
- assignok = parser_state&PST_ASSIGNOK; /* XXX */
-
- wl = (WORD_LIST *)NULL; /* ( */
- parser_state |= PST_COMPASSIGN;
-
- while ((tok = read_token (READ)) != ')')
- {
- if (tok == '\n') /* Allow newlines in compound assignments */
- {
- if (SHOULD_PROMPT ())
- prompt_again ();
- continue;
- }
- if (tok != WORD && tok != ASSIGNMENT_WORD)
- {
- current_token = tok; /* for error reporting */
- if (tok == yacc_EOF) /* ( */
- parser_error (orig_line_number, _("unexpected EOF while looking for matching `)'"));
- else
- yyerror(NULL); /* does the right thing */
- if (wl)
- dispose_words (wl);
- wl = &parse_string_error;
- break;
- }
- wl = make_word_list (yylval.word, wl);
- }
-
- FREE (token);
- token = saved_token;
- token_buffer_size = orig_token_size;
-
- parser_state &= ~PST_COMPASSIGN;
-
- if (wl == &parse_string_error)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- last_read_token = '\n'; /* XXX */
- if (interactive_shell == 0 && posixly_correct)
- jump_to_top_level (FORCE_EOF);
- else
- jump_to_top_level (DISCARD);
- }
-
- last_read_token = orig_last_token; /* XXX - was WORD? */
-
- if (wl)
- {
- rl = REVERSE_LIST (wl, WORD_LIST *);
- ret = string_list (rl);
- dispose_words (rl);
- }
- else
- ret = (char *)NULL;
-
- if (retlenp)
- *retlenp = (ret && *ret) ? strlen (ret) : 0;
-
- if (assignok)
- parser_state |= PST_ASSIGNOK;
-
- return ret;
-}
-
-/************************************************
- * *
- * SAVING AND RESTORING PARTIAL PARSE STATE *
- * *
- ************************************************/
-
-sh_parser_state_t *
-save_parser_state (ps)
- sh_parser_state_t *ps;
-{
- if (ps == 0)
- ps = (sh_parser_state_t *)xmalloc (sizeof (sh_parser_state_t));
- if (ps == 0)
- return ((sh_parser_state_t *)NULL);
-
- ps->parser_state = parser_state;
- ps->token_state = save_token_state ();
-
- ps->input_line_terminator = shell_input_line_terminator;
- ps->eof_encountered = eof_encountered;
-
- ps->prompt_string_pointer = prompt_string_pointer;
-
- ps->current_command_line_count = current_command_line_count;
-
-#if defined (HISTORY)
- ps->remember_on_history = remember_on_history;
-# if defined (BANG_HISTORY)
- ps->history_expansion_inhibited = history_expansion_inhibited;
-# endif
-#endif
-
- ps->last_command_exit_value = last_command_exit_value;
-#if defined (ARRAY_VARS)
- ps->pipestatus = save_pipestatus_array ();
-#endif
-
- ps->last_shell_builtin = last_shell_builtin;
- ps->this_shell_builtin = this_shell_builtin;
-
- ps->expand_aliases = expand_aliases;
- ps->echo_input_at_read = echo_input_at_read;
-
- ps->token = token;
- ps->token_buffer_size = token_buffer_size;
- /* Force reallocation on next call to read_token_word */
- token = 0;
- token_buffer_size = 0;
-
- return (ps);
-}
-
-void
-restore_parser_state (ps)
- sh_parser_state_t *ps;
-{
- if (ps == 0)
- return;
-
- parser_state = ps->parser_state;
- if (ps->token_state)
- {
- restore_token_state (ps->token_state);
- free (ps->token_state);
- }
-
- shell_input_line_terminator = ps->input_line_terminator;
- eof_encountered = ps->eof_encountered;
-
- prompt_string_pointer = ps->prompt_string_pointer;
-
- current_command_line_count = ps->current_command_line_count;
-
-#if defined (HISTORY)
- remember_on_history = ps->remember_on_history;
-# if defined (BANG_HISTORY)
- history_expansion_inhibited = ps->history_expansion_inhibited;
-# endif
-#endif
-
- last_command_exit_value = ps->last_command_exit_value;
-#if defined (ARRAY_VARS)
- restore_pipestatus_array (ps->pipestatus);
-#endif
-
- last_shell_builtin = ps->last_shell_builtin;
- this_shell_builtin = ps->this_shell_builtin;
-
- expand_aliases = ps->expand_aliases;
- echo_input_at_read = ps->echo_input_at_read;
-
- FREE (token);
- token = ps->token;
- token_buffer_size = ps->token_buffer_size;
-}
-
-sh_input_line_state_t *
-save_input_line_state (ls)
- sh_input_line_state_t *ls;
-{
- if (ls == 0)
- ls = (sh_input_line_state_t *)xmalloc (sizeof (sh_input_line_state_t));
- if (ls == 0)
- return ((sh_input_line_state_t *)NULL);
-
- ls->input_line = shell_input_line;
- ls->input_line_size = shell_input_line_size;
- ls->input_line_len = shell_input_line_len;
- ls->input_line_index = shell_input_line_index;
-
- /* force reallocation */
- shell_input_line = 0;
- shell_input_line_size = shell_input_line_len = shell_input_line_index = 0;
-}
-
-void
-restore_input_line_state (ls)
- sh_input_line_state_t *ls;
-{
- FREE (shell_input_line);
- shell_input_line = ls->input_line;
- shell_input_line_size = ls->input_line_size;
- shell_input_line_len = ls->input_line_len;
- shell_input_line_index = ls->input_line_index;
-
- set_line_mbstate ();
-}
-
-/************************************************
- * *
- * MULTIBYTE CHARACTER HANDLING *
- * *
- ************************************************/
-
-#if defined (HANDLE_MULTIBYTE)
-static void
-set_line_mbstate ()
-{
- int i, previ, len, c;
- mbstate_t mbs, prevs;
- size_t mbclen;
-
- if (shell_input_line == NULL)
- return;
- len = strlen (shell_input_line); /* XXX - shell_input_line_len ? */
- FREE (shell_input_line_property);
- shell_input_line_property = (char *)xmalloc (len + 1);
-
- memset (&prevs, '\0', sizeof (mbstate_t));
- for (i = previ = 0; i < len; i++)
- {
- mbs = prevs;
-
- c = shell_input_line[i];
- if (c == EOF)
- {
- int j;
- for (j = i; j < len; j++)
- shell_input_line_property[j] = 1;
- break;
- }
-
- mbclen = mbrlen (shell_input_line + previ, i - previ + 1, &mbs);
- if (mbclen == 1 || mbclen == (size_t)-1)
- {
- mbclen = 1;
- previ = i + 1;
- }
- else if (mbclen == (size_t)-2)
- mbclen = 0;
- else if (mbclen > 1)
- {
- mbclen = 0;
- previ = i + 1;
- prevs = mbs;
- }
- else
- {
- /* XXX - what to do if mbrlen returns 0? (null wide character) */
- int j;
- for (j = i; j < len; j++)
- shell_input_line_property[j] = 1;
- break;
- }
-
- shell_input_line_property[i] = mbclen;
- }
-}
-#endif /* HANDLE_MULTIBYTE */
+++ /dev/null
-/* patchlevel.h -- current bash patch level */
-
-/* Copyright (C) 2001-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined (_PATCHLEVEL_H_)
-#define _PATCHLEVEL_H_
-
-/* It's important that there be no other strings in this file that match the
- regexp `^#define[ ]*PATCHLEVEL', since that's what support/mkversion.sh
- looks for to find the patch level (for the sccs version string). */
-
-#define PATCHLEVEL 1
-
-#endif /* _PATCHLEVEL_H_ */
+++ /dev/null
-# Set of available languages.
-en@quot en@boldquot af bg ca cs de eo es et fi fr ga hu id ja lt nl pl pt_BR ro ru sk sv tr uk vi zh_CN zh_TW
+++ /dev/null
-/* print_command -- A way to make readable commands from a command tree. */
-
-/* Copyright (C) 1989-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#include <stdio.h>
-
-#if defined (HAVE_UNISTD_H)
-# ifdef _MINIX
-# include <sys/types.h>
-# endif
-# include <unistd.h>
-#endif
-
-#if defined (PREFER_STDARG)
-# include <stdarg.h>
-#else
-# include <varargs.h>
-#endif
-
-#include "bashansi.h"
-#include "bashintl.h"
-
-#include "shell.h"
-#include "flags.h"
-#include <y.tab.h> /* use <...> so we pick it up from the build directory */
-
-#include "shmbutil.h"
-
-#include "builtins/common.h"
-
-#if !HAVE_DECL_PRINTF
-extern int printf __P((const char *, ...)); /* Yuck. Double yuck. */
-#endif
-
-extern int indirection_level;
-
-static int indentation;
-static int indentation_amount = 4;
-
-#if defined (PREFER_STDARG)
-typedef void PFUNC __P((const char *, ...));
-
-static void cprintf __P((const char *, ...)) __attribute__((__format__ (printf, 1, 2)));
-static void xprintf __P((const char *, ...)) __attribute__((__format__ (printf, 1, 2)));
-#else
-#define PFUNC VFunction
-static void cprintf ();
-static void xprintf ();
-#endif
-
-static void reset_locals __P((void));
-static void newline __P((char *));
-static void indent __P((int));
-static void semicolon __P((void));
-static void the_printed_command_resize __P((int));
-
-static void make_command_string_internal __P((COMMAND *));
-static void _print_word_list __P((WORD_LIST *, char *, PFUNC *));
-static void command_print_word_list __P((WORD_LIST *, char *));
-static void print_case_clauses __P((PATTERN_LIST *));
-static void print_redirection_list __P((REDIRECT *));
-static void print_redirection __P((REDIRECT *));
-static void print_heredoc_header __P((REDIRECT *));
-static void print_heredoc_body __P((REDIRECT *));
-static void print_heredocs __P((REDIRECT *));
-static void print_deferred_heredocs __P((const char *));
-
-static void print_for_command __P((FOR_COM *));
-#if defined (ARITH_FOR_COMMAND)
-static void print_arith_for_command __P((ARITH_FOR_COM *));
-#endif
-#if defined (SELECT_COMMAND)
-static void print_select_command __P((SELECT_COM *));
-#endif
-static void print_group_command __P((GROUP_COM *));
-static void print_case_command __P((CASE_COM *));
-static void print_while_command __P((WHILE_COM *));
-static void print_until_command __P((WHILE_COM *));
-static void print_until_or_while __P((WHILE_COM *, char *));
-static void print_if_command __P((IF_COM *));
-#if defined (COND_COMMAND)
-static void print_cond_node __P((COND_COM *));
-#endif
-static void print_function_def __P((FUNCTION_DEF *));
-
-#define PRINTED_COMMAND_INITIAL_SIZE 64
-#define PRINTED_COMMAND_GROW_SIZE 128
-
-char *the_printed_command = (char *)NULL;
-int the_printed_command_size = 0;
-int command_string_index = 0;
-
-int xtrace_fd = -1;
-FILE *xtrace_fp = 0;
-
-#define CHECK_XTRACE_FP xtrace_fp = (xtrace_fp ? xtrace_fp : stderr)
-
-#define PRINT_DEFERRED_HEREDOCS(x) \
- do { \
- if (deferred_heredocs) \
- print_deferred_heredocs (x); \
- } while (0)
-
-/* Non-zero means the stuff being printed is inside of a function def. */
-static int inside_function_def;
-static int skip_this_indent;
-static int was_heredoc;
-static int printing_connection;
-static REDIRECT *deferred_heredocs;
-
-/* The depth of the group commands that we are currently printing. This
- includes the group command that is a function body. */
-static int group_command_nesting;
-
-/* A buffer to indicate the indirection level (PS4) when set -x is enabled. */
-static char *indirection_string = 0;
-static int indirection_stringsiz = 0;
-
-/* Print COMMAND (a command tree) on standard output. */
-void
-print_command (command)
- COMMAND *command;
-{
- command_string_index = 0;
- printf ("%s", make_command_string (command));
-}
-
-/* Make a string which is the printed representation of the command
- tree in COMMAND. We return this string. However, the string is
- not consed, so you have to do that yourself if you want it to
- remain around. */
-char *
-make_command_string (command)
- COMMAND *command;
-{
- command_string_index = was_heredoc = 0;
- deferred_heredocs = 0;
- make_command_string_internal (command);
- return (the_printed_command);
-}
-
-/* The internal function. This is the real workhorse. */
-static void
-make_command_string_internal (command)
- COMMAND *command;
-{
- char s[3];
-
- if (command == 0)
- cprintf ("");
- else
- {
- if (skip_this_indent)
- skip_this_indent--;
- else
- indent (indentation);
-
- if (command->flags & CMD_TIME_PIPELINE)
- {
- cprintf ("time ");
- if (command->flags & CMD_TIME_POSIX)
- cprintf ("-p ");
- }
-
- if (command->flags & CMD_INVERT_RETURN)
- cprintf ("! ");
-
- switch (command->type)
- {
- case cm_for:
- print_for_command (command->value.For);
- break;
-
-#if defined (ARITH_FOR_COMMAND)
- case cm_arith_for:
- print_arith_for_command (command->value.ArithFor);
- break;
-#endif
-
-#if defined (SELECT_COMMAND)
- case cm_select:
- print_select_command (command->value.Select);
- break;
-#endif
-
- case cm_case:
- print_case_command (command->value.Case);
- break;
-
- case cm_while:
- print_while_command (command->value.While);
- break;
-
- case cm_until:
- print_until_command (command->value.While);
- break;
-
- case cm_if:
- print_if_command (command->value.If);
- break;
-
-#if defined (DPAREN_ARITHMETIC)
- case cm_arith:
- print_arith_command (command->value.Arith->exp);
- break;
-#endif
-
-#if defined (COND_COMMAND)
- case cm_cond:
- print_cond_command (command->value.Cond);
- break;
-#endif
-
- case cm_simple:
- print_simple_command (command->value.Simple);
- break;
-
- case cm_connection:
-
- skip_this_indent++;
- printing_connection++;
- make_command_string_internal (command->value.Connection->first);
-
- switch (command->value.Connection->connector)
- {
- case '&':
- case '|':
- {
- char c = command->value.Connection->connector;
-
- s[0] = ' ';
- s[1] = c;
- s[2] = '\0';
-
- print_deferred_heredocs (s);
-
- if (c != '&' || command->value.Connection->second)
- {
- cprintf (" ");
- skip_this_indent++;
- }
- }
- break;
-
- case AND_AND:
- print_deferred_heredocs (" && ");
- if (command->value.Connection->second)
- skip_this_indent++;
- break;
-
- case OR_OR:
- print_deferred_heredocs (" || ");
- if (command->value.Connection->second)
- skip_this_indent++;
- break;
-
- case ';':
- if (deferred_heredocs == 0)
- {
- if (was_heredoc == 0)
- cprintf (";");
- else
- was_heredoc = 0;
- }
- else
- print_deferred_heredocs (inside_function_def ? "" : ";");
-
- if (inside_function_def)
- cprintf ("\n");
- else
- {
- cprintf (" ");
- if (command->value.Connection->second)
- skip_this_indent++;
- }
- break;
-
- default:
- cprintf (_("print_command: bad connector `%d'"),
- command->value.Connection->connector);
- break;
- }
-
- make_command_string_internal (command->value.Connection->second);
- PRINT_DEFERRED_HEREDOCS ("");
- printing_connection--;
- break;
-
- case cm_function_def:
- print_function_def (command->value.Function_def);
- break;
-
- case cm_group:
- print_group_command (command->value.Group);
- break;
-
- case cm_subshell:
- cprintf ("( ");
- skip_this_indent++;
- make_command_string_internal (command->value.Subshell->command);
- cprintf (" )");
- break;
-
- case cm_coproc:
- cprintf ("coproc %s ", command->value.Coproc->name);
- skip_this_indent++;
- make_command_string_internal (command->value.Coproc->command);
- break;
-
- default:
- command_error ("print_command", CMDERR_BADTYPE, command->type, 0);
- break;
- }
-
-
- if (command->redirects)
- {
- cprintf (" ");
- print_redirection_list (command->redirects);
- }
- }
-}
-
-static void
-_print_word_list (list, separator, pfunc)
- WORD_LIST *list;
- char *separator;
- PFUNC *pfunc;
-{
- WORD_LIST *w;
-
- for (w = list; w; w = w->next)
- (*pfunc) ("%s%s", w->word->word, w->next ? separator : "");
-}
-
-void
-print_word_list (list, separator)
- WORD_LIST *list;
- char *separator;
-{
- _print_word_list (list, separator, xprintf);
-}
-
-void
-xtrace_set (fd, fp)
- int fd;
- FILE *fp;
-{
- if (fd >= 0 && sh_validfd (fd) == 0)
- {
- internal_error (_("xtrace_set: %d: invalid file descriptor"), fd);
- return;
- }
- if (fp == 0)
- {
- internal_error (_("xtrace_set: NULL file pointer"));
- return;
- }
- if (fd >= 0 && fileno (fp) != fd)
- internal_warning (_("xtrace fd (%d) != fileno xtrace fp (%d)"), fd, fileno (fp));
-
- xtrace_fd = fd;
- xtrace_fp = fp;
-}
-
-void
-xtrace_init ()
-{
- xtrace_set (-1, stderr);
-}
-
-void
-xtrace_reset ()
-{
- if (xtrace_fd >= 0 && xtrace_fp)
- {
- fflush (xtrace_fp);
- fclose (xtrace_fp);
- }
- else if (xtrace_fd >= 0)
- close (xtrace_fd);
-
- xtrace_fd = -1;
- xtrace_fp = stderr;
-}
-
-void
-xtrace_fdchk (fd)
- int fd;
-{
- if (fd == xtrace_fd)
- xtrace_reset ();
-}
-
-/* Return a string denoting what our indirection level is. */
-
-char *
-indirection_level_string ()
-{
- register int i, j;
- char *ps4;
- char ps4_firstc[MB_LEN_MAX+1];
- int ps4_firstc_len, ps4_len, ineed;
-
- ps4 = get_string_value ("PS4");
- if (indirection_string == 0)
- indirection_string = xmalloc (indirection_stringsiz = 100);
- indirection_string[0] = '\0';
-
- if (ps4 == 0 || *ps4 == '\0')
- return (indirection_string);
-
- change_flag ('x', FLAG_OFF);
- ps4 = decode_prompt_string (ps4);
- change_flag ('x', FLAG_ON);
-
- if (ps4 == 0 || *ps4 == '\0')
- return (indirection_string);
-
-#if defined (HANDLE_MULTIBYTE)
- ps4_len = strnlen (ps4, MB_CUR_MAX);
- ps4_firstc_len = MBLEN (ps4, ps4_len);
- if (ps4_firstc_len == 1 || ps4_firstc_len == 0 || ps4_firstc_len < 0)
- {
- ps4_firstc[0] = ps4[0];
- ps4_firstc[ps4_firstc_len = 1] = '\0';
- }
- else
- memcpy (ps4_firstc, ps4, ps4_firstc_len);
-#else
- ps4_firstc[0] = ps4[0];
- ps4_firstc[ps4_firstc_len = 1] = '\0';
-#endif
-
- for (i = j = 0; ps4_firstc[0] && j < indirection_level && i < indirection_stringsiz - 1; i += ps4_firstc_len, j++)
- {
- if (ps4_firstc_len == 1)
- indirection_string[i] = ps4_firstc[0];
- else
- memcpy (indirection_string+i, ps4_firstc, ps4_firstc_len);
- }
-
- for (j = ps4_firstc_len; *ps4 && ps4[j] && i < indirection_stringsiz - 1; i++, j++)
- indirection_string[i] = ps4[j];
-
- indirection_string[i] = '\0';
- free (ps4);
- return (indirection_string);
-}
-
-void
-xtrace_print_assignment (name, value, assign_list, xflags)
- char *name, *value;
- int assign_list, xflags;
-{
- char *nval;
-
- CHECK_XTRACE_FP;
-
- if (xflags)
- fprintf (xtrace_fp, "%s", indirection_level_string ());
-
- /* VALUE should not be NULL when this is called. */
- if (*value == '\0' || assign_list)
- nval = value;
- else if (sh_contains_shell_metas (value))
- nval = sh_single_quote (value);
- else if (ansic_shouldquote (value))
- nval = ansic_quote (value, 0, (int *)0);
- else
- nval = value;
-
- if (assign_list)
- fprintf (xtrace_fp, "%s=(%s)\n", name, nval);
- else
- fprintf (xtrace_fp, "%s=%s\n", name, nval);
-
- if (nval != value)
- FREE (nval);
-
- fflush (xtrace_fp);
-}
-
-/* A function to print the words of a simple command when set -x is on. */
-void
-xtrace_print_word_list (list, xtflags)
- WORD_LIST *list;
- int xtflags;
-{
- WORD_LIST *w;
- char *t, *x;
-
- CHECK_XTRACE_FP;
-
- if (xtflags)
- fprintf (xtrace_fp, "%s", indirection_level_string ());
-
- for (w = list; w; w = w->next)
- {
- t = w->word->word;
- if (t == 0 || *t == '\0')
- fprintf (xtrace_fp, "''%s", w->next ? " " : "");
- else if (sh_contains_shell_metas (t))
- {
- x = sh_single_quote (t);
- fprintf (xtrace_fp, "%s%s", x, w->next ? " " : "");
- free (x);
- }
- else if (ansic_shouldquote (t))
- {
- x = ansic_quote (t, 0, (int *)0);
- fprintf (xtrace_fp, "%s%s", x, w->next ? " " : "");
- free (x);
- }
- else
- fprintf (xtrace_fp, "%s%s", t, w->next ? " " : "");
- }
- fprintf (xtrace_fp, "\n");
- fflush (xtrace_fp);
-}
-
-static void
-command_print_word_list (list, separator)
- WORD_LIST *list;
- char *separator;
-{
- _print_word_list (list, separator, cprintf);
-}
-
-void
-print_for_command_head (for_command)
- FOR_COM *for_command;
-{
- cprintf ("for %s in ", for_command->name->word);
- command_print_word_list (for_command->map_list, " ");
-}
-
-void
-xtrace_print_for_command_head (for_command)
- FOR_COM *for_command;
-{
- CHECK_XTRACE_FP;
- fprintf (xtrace_fp, "%s", indirection_level_string ());
- fprintf (xtrace_fp, "for %s in ", for_command->name->word);
- xtrace_print_word_list (for_command->map_list, 0);
-}
-
-static void
-print_for_command (for_command)
- FOR_COM *for_command;
-{
- print_for_command_head (for_command);
- cprintf (";");
- newline ("do\n");
-
- indentation += indentation_amount;
- make_command_string_internal (for_command->action);
- PRINT_DEFERRED_HEREDOCS ("");
- semicolon ();
- indentation -= indentation_amount;
-
- newline ("done");
-}
-
-#if defined (ARITH_FOR_COMMAND)
-static void
-print_arith_for_command (arith_for_command)
- ARITH_FOR_COM *arith_for_command;
-{
- cprintf ("for ((");
- command_print_word_list (arith_for_command->init, " ");
- cprintf ("; ");
- command_print_word_list (arith_for_command->test, " ");
- cprintf ("; ");
- command_print_word_list (arith_for_command->step, " ");
- cprintf ("))");
- newline ("do\n");
- indentation += indentation_amount;
- make_command_string_internal (arith_for_command->action);
- semicolon ();
- indentation -= indentation_amount;
- newline ("done");
-}
-#endif /* ARITH_FOR_COMMAND */
-
-#if defined (SELECT_COMMAND)
-void
-print_select_command_head (select_command)
- SELECT_COM *select_command;
-{
- cprintf ("select %s in ", select_command->name->word);
- command_print_word_list (select_command->map_list, " ");
-}
-
-void
-xtrace_print_select_command_head (select_command)
- SELECT_COM *select_command;
-{
- CHECK_XTRACE_FP;
- fprintf (xtrace_fp, "%s", indirection_level_string ());
- fprintf (xtrace_fp, "select %s in ", select_command->name->word);
- xtrace_print_word_list (select_command->map_list, 0);
-}
-
-static void
-print_select_command (select_command)
- SELECT_COM *select_command;
-{
- print_select_command_head (select_command);
-
- cprintf (";");
- newline ("do\n");
- indentation += indentation_amount;
- make_command_string_internal (select_command->action);
- PRINT_DEFERRED_HEREDOCS ("");
- semicolon ();
- indentation -= indentation_amount;
- newline ("done");
-}
-#endif /* SELECT_COMMAND */
-
-static void
-print_group_command (group_command)
- GROUP_COM *group_command;
-{
- group_command_nesting++;
- cprintf ("{ ");
-
- if (inside_function_def == 0)
- skip_this_indent++;
- else
- {
- /* This is a group command { ... } inside of a function
- definition, and should be printed as a multiline group
- command, using the current indentation. */
- cprintf ("\n");
- indentation += indentation_amount;
- }
-
- make_command_string_internal (group_command->command);
-
- if (inside_function_def)
- {
- cprintf ("\n");
- indentation -= indentation_amount;
- indent (indentation);
- }
- else
- {
- semicolon ();
- cprintf (" ");
- }
-
- cprintf ("}");
-
- group_command_nesting--;
-}
-
-void
-print_case_command_head (case_command)
- CASE_COM *case_command;
-{
- cprintf ("case %s in ", case_command->word->word);
-}
-
-void
-xtrace_print_case_command_head (case_command)
- CASE_COM *case_command;
-{
- CHECK_XTRACE_FP;
- fprintf (xtrace_fp, "%s", indirection_level_string ());
- fprintf (xtrace_fp, "case %s in\n", case_command->word->word);
-}
-
-static void
-print_case_command (case_command)
- CASE_COM *case_command;
-{
- print_case_command_head (case_command);
-
- if (case_command->clauses)
- print_case_clauses (case_command->clauses);
- newline ("esac");
-}
-
-static void
-print_case_clauses (clauses)
- PATTERN_LIST *clauses;
-{
- indentation += indentation_amount;
- while (clauses)
- {
- newline ("");
- command_print_word_list (clauses->patterns, " | ");
- cprintf (")\n");
- indentation += indentation_amount;
- make_command_string_internal (clauses->action);
- indentation -= indentation_amount;
- PRINT_DEFERRED_HEREDOCS ("");
- if (clauses->flags & CASEPAT_FALLTHROUGH)
- newline (";&");
- else if (clauses->flags & CASEPAT_TESTNEXT)
- newline (";;&");
- else
- newline (";;");
- clauses = clauses->next;
- }
- indentation -= indentation_amount;
-}
-
-static void
-print_while_command (while_command)
- WHILE_COM *while_command;
-{
- print_until_or_while (while_command, "while");
-}
-
-static void
-print_until_command (while_command)
- WHILE_COM *while_command;
-{
- print_until_or_while (while_command, "until");
-}
-
-static void
-print_until_or_while (while_command, which)
- WHILE_COM *while_command;
- char *which;
-{
- cprintf ("%s ", which);
- skip_this_indent++;
- make_command_string_internal (while_command->test);
- PRINT_DEFERRED_HEREDOCS ("");
- semicolon ();
- cprintf (" do\n"); /* was newline ("do\n"); */
- indentation += indentation_amount;
- make_command_string_internal (while_command->action);
- PRINT_DEFERRED_HEREDOCS ("");
- indentation -= indentation_amount;
- semicolon ();
- newline ("done");
-}
-
-static void
-print_if_command (if_command)
- IF_COM *if_command;
-{
- cprintf ("if ");
- skip_this_indent++;
- make_command_string_internal (if_command->test);
- semicolon ();
- cprintf (" then\n");
- indentation += indentation_amount;
- make_command_string_internal (if_command->true_case);
- PRINT_DEFERRED_HEREDOCS ("");
- indentation -= indentation_amount;
-
- if (if_command->false_case)
- {
- semicolon ();
- newline ("else\n");
- indentation += indentation_amount;
- make_command_string_internal (if_command->false_case);
- PRINT_DEFERRED_HEREDOCS ("");
- indentation -= indentation_amount;
- }
- semicolon ();
- newline ("fi");
-}
-
-#if defined (DPAREN_ARITHMETIC)
-void
-print_arith_command (arith_cmd_list)
- WORD_LIST *arith_cmd_list;
-{
- cprintf ("((");
- command_print_word_list (arith_cmd_list, " ");
- cprintf ("))");
-}
-#endif
-
-#if defined (COND_COMMAND)
-static void
-print_cond_node (cond)
- COND_COM *cond;
-{
- if (cond->flags & CMD_INVERT_RETURN)
- cprintf ("! ");
-
- if (cond->type == COND_EXPR)
- {
- cprintf ("( ");
- print_cond_node (cond->left);
- cprintf (" )");
- }
- else if (cond->type == COND_AND)
- {
- print_cond_node (cond->left);
- cprintf (" && ");
- print_cond_node (cond->right);
- }
- else if (cond->type == COND_OR)
- {
- print_cond_node (cond->left);
- cprintf (" || ");
- print_cond_node (cond->right);
- }
- else if (cond->type == COND_UNARY)
- {
- cprintf ("%s", cond->op->word);
- cprintf (" ");
- print_cond_node (cond->left);
- }
- else if (cond->type == COND_BINARY)
- {
- print_cond_node (cond->left);
- cprintf (" ");
- cprintf ("%s", cond->op->word);
- cprintf (" ");
- print_cond_node (cond->right);
- }
- else if (cond->type == COND_TERM)
- {
- cprintf ("%s", cond->op->word); /* need to add quoting here */
- }
-}
-
-void
-print_cond_command (cond)
- COND_COM *cond;
-{
- cprintf ("[[ ");
- print_cond_node (cond);
- cprintf (" ]]");
-}
-
-#ifdef DEBUG
-void
-debug_print_cond_command (cond)
- COND_COM *cond;
-{
- fprintf (stderr, "DEBUG: ");
- command_string_index = 0;
- print_cond_command (cond);
- fprintf (stderr, "%s\n", the_printed_command);
-}
-#endif
-
-void
-xtrace_print_cond_term (type, invert, op, arg1, arg2)
- int type, invert;
- WORD_DESC *op;
- char *arg1, *arg2;
-{
- CHECK_XTRACE_FP;
- command_string_index = 0;
- fprintf (xtrace_fp, "%s", indirection_level_string ());
- fprintf (xtrace_fp, "[[ ");
- if (invert)
- fprintf (xtrace_fp, "! ");
-
- if (type == COND_UNARY)
- {
- fprintf (xtrace_fp, "%s ", op->word);
- fprintf (xtrace_fp, "%s", (arg1 && *arg1) ? arg1 : "''");
- }
- else if (type == COND_BINARY)
- {
- fprintf (xtrace_fp, "%s", (arg1 && *arg1) ? arg1 : "''");
- fprintf (xtrace_fp, " %s ", op->word);
- fprintf (xtrace_fp, "%s", (arg2 && *arg2) ? arg2 : "''");
- }
-
- fprintf (xtrace_fp, " ]]\n");
-
- fflush (xtrace_fp);
-}
-#endif /* COND_COMMAND */
-
-#if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND)
-/* A function to print the words of an arithmetic command when set -x is on. */
-void
-xtrace_print_arith_cmd (list)
- WORD_LIST *list;
-{
- WORD_LIST *w;
-
- CHECK_XTRACE_FP;
- fprintf (xtrace_fp, "%s", indirection_level_string ());
- fprintf (xtrace_fp, "(( ");
- for (w = list; w; w = w->next)
- fprintf (xtrace_fp, "%s%s", w->word->word, w->next ? " " : "");
- fprintf (xtrace_fp, " ))\n");
-
- fflush (xtrace_fp);
-}
-#endif
-
-void
-print_simple_command (simple_command)
- SIMPLE_COM *simple_command;
-{
- command_print_word_list (simple_command->words, " ");
-
- if (simple_command->redirects)
- {
- cprintf (" ");
- print_redirection_list (simple_command->redirects);
- }
-}
-
-static void
-print_heredocs (heredocs)
- REDIRECT *heredocs;
-{
- REDIRECT *hdtail;
-
- cprintf (" ");
- for (hdtail = heredocs; hdtail; hdtail = hdtail->next)
- {
- print_redirection (hdtail);
- cprintf ("\n");
- }
- was_heredoc = 1;
-}
-
-/* Print heredocs that are attached to the command before the connector
- represented by CSTRING. The parsing semantics require us to print the
- here-doc delimiters, then the connector (CSTRING), then the here-doc
- bodies. We don't print the connector if it's a `;', but we use it to
- note not to print an extra space after the last heredoc body and
- newline. */
-static void
-print_deferred_heredocs (cstring)
- const char *cstring;
-{
- REDIRECT *hdtail;
-
- for (hdtail = deferred_heredocs; hdtail; hdtail = hdtail->next)
- {
- cprintf (" ");
- print_heredoc_header (hdtail);
- }
- if (cstring[0] && (cstring[0] != ';' || cstring[1]))
- cprintf ("%s", cstring);
- if (deferred_heredocs)
- cprintf ("\n");
- for (hdtail = deferred_heredocs; hdtail; hdtail = hdtail->next)
- {
- print_heredoc_body (hdtail);
- cprintf ("\n");
- }
- if (deferred_heredocs)
- {
- if (cstring && cstring[0] && (cstring[0] != ';' || cstring[1]))
- cprintf (" "); /* make sure there's at least one space */
- dispose_redirects (deferred_heredocs);
- was_heredoc = 1;
- }
- deferred_heredocs = (REDIRECT *)NULL;
-}
-
-static void
-print_redirection_list (redirects)
- REDIRECT *redirects;
-{
- REDIRECT *heredocs, *hdtail, *newredir;
-
- heredocs = (REDIRECT *)NULL;
- hdtail = heredocs;
-
- was_heredoc = 0;
- while (redirects)
- {
- /* Defer printing the here documents until we've printed the
- rest of the redirections. */
- if (redirects->instruction == r_reading_until || redirects->instruction == r_deblank_reading_until)
- {
- newredir = copy_redirect (redirects);
- newredir->next = (REDIRECT *)NULL;
- if (heredocs)
- {
- hdtail->next = newredir;
- hdtail = newredir;
- }
- else
- hdtail = heredocs = newredir;
- }
- else if (redirects->instruction == r_duplicating_output_word && redirects->redirector.dest == 1)
- {
- /* Temporarily translate it as the execution code does. */
- redirects->instruction = r_err_and_out;
- print_redirection (redirects);
- redirects->instruction = r_duplicating_output_word;
- }
- else
- print_redirection (redirects);
-
- redirects = redirects->next;
- if (redirects)
- cprintf (" ");
- }
-
- /* Now that we've printed all the other redirections (on one line),
- print the here documents. */
- if (heredocs && printing_connection)
- deferred_heredocs = heredocs;
- else if (heredocs)
- {
- print_heredocs (heredocs);
- dispose_redirects (heredocs);
- }
-}
-
-static void
-print_heredoc_header (redirect)
- REDIRECT *redirect;
-{
- int kill_leading;
- char *x;
-
- kill_leading = redirect->instruction == r_deblank_reading_until;
-
- /* Here doc header */
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}", redirect->redirector.filename->word);
- else if (redirect->redirector.dest != 0)
- cprintf ("%d", redirect->redirector.dest);
-
- /* If the here document delimiter is quoted, single-quote it. */
- if (redirect->redirectee.filename->flags & W_QUOTED)
- {
- x = sh_single_quote (redirect->here_doc_eof);
- cprintf ("<<%s%s", kill_leading ? "-" : "", x);
- free (x);
- }
- else
- cprintf ("<<%s%s", kill_leading ? "-" : "", redirect->here_doc_eof);
-}
-
-static void
-print_heredoc_body (redirect)
- REDIRECT *redirect;
-{
- /* Here doc body */
- cprintf ("%s%s", redirect->redirectee.filename->word, redirect->here_doc_eof);
-}
-
-static void
-print_redirection (redirect)
- REDIRECT *redirect;
-{
- int redirector, redir_fd;
- WORD_DESC *redirectee, *redir_word;
-
- redirectee = redirect->redirectee.filename;
- redir_fd = redirect->redirectee.dest;
-
- redir_word = redirect->redirector.filename;
- redirector = redirect->redirector.dest;
-
- switch (redirect->instruction)
- {
- case r_input_direction:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}", redir_word->word);
- else if (redirector != 0)
- cprintf ("%d", redirector);
- cprintf ("< %s", redirectee->word);
- break;
-
- case r_output_direction:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}", redir_word->word);
- else if (redirector != 1)
- cprintf ("%d", redirector);
- cprintf ("> %s", redirectee->word);
- break;
-
- case r_inputa_direction: /* Redirection created by the shell. */
- cprintf ("&");
- break;
-
- case r_output_force:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}", redir_word->word);
- else if (redirector != 1)
- cprintf ("%d", redirector);
- cprintf (">|%s", redirectee->word);
- break;
-
- case r_appending_to:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}", redir_word->word);
- else if (redirector != 1)
- cprintf ("%d", redirector);
- cprintf (">> %s", redirectee->word);
- break;
-
- case r_input_output:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}", redir_word->word);
- else if (redirector != 1)
- cprintf ("%d", redirector);
- cprintf ("<> %s", redirectee->word);
- break;
-
- case r_deblank_reading_until:
- case r_reading_until:
- print_heredoc_header (redirect);
- cprintf ("\n");
- print_heredoc_body (redirect);
- break;
-
- case r_reading_string:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}", redir_word->word);
- else if (redirector != 0)
- cprintf ("%d", redirector);
-#if 0
- /* Don't need to check whether or not to requote, since original quotes
- are still intact. The only thing that has happened is that $'...'
- has been replaced with 'expanded ...'. */
- if (ansic_shouldquote (redirect->redirectee.filename->word))
- {
- char *x;
- x = ansic_quote (redirect->redirectee.filename->word, 0, (int *)0);
- cprintf ("<<< %s", x);
- free (x);
- }
- else
-#endif
- cprintf ("<<< %s", redirect->redirectee.filename->word);
- break;
-
- case r_duplicating_input:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}<&%d", redir_word->word, redir_fd);
- else
- cprintf ("%d<&%d", redirector, redir_fd);
- break;
-
- case r_duplicating_output:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}>&%d", redir_word->word, redir_fd);
- else
- cprintf ("%d>&%d", redirector, redir_fd);
- break;
-
- case r_duplicating_input_word:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}<&%s", redir_word->word, redirectee->word);
- else
- cprintf ("%d<&%s", redirector, redirectee->word);
- break;
-
- case r_duplicating_output_word:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}>&%s", redir_word->word, redirectee->word);
- else
- cprintf ("%d>&%s", redirector, redirectee->word);
- break;
-
- case r_move_input:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}<&%d-", redir_word->word, redir_fd);
- else
- cprintf ("%d<&%d-", redirector, redir_fd);
- break;
-
- case r_move_output:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}>&%d-", redir_word->word, redir_fd);
- else
- cprintf ("%d>&%d-", redirector, redir_fd);
- break;
-
- case r_move_input_word:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}<&%s-", redir_word->word, redirectee->word);
- else
- cprintf ("%d<&%s-", redirector, redirectee->word);
- break;
-
- case r_move_output_word:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}>&%s-", redir_word->word, redirectee->word);
- else
- cprintf ("%d>&%s-", redirector, redirectee->word);
- break;
-
- case r_close_this:
- if (redirect->rflags & REDIR_VARASSIGN)
- cprintf ("{%s}>&-", redir_word->word);
- else
- cprintf ("%d>&-", redirector);
- break;
-
- case r_err_and_out:
- cprintf ("&>%s", redirectee->word);
- break;
-
- case r_append_err_and_out:
- cprintf ("&>>%s", redirectee->word);
- break;
- }
-}
-
-static void
-reset_locals ()
-{
- inside_function_def = 0;
- indentation = 0;
- printing_connection = 0;
- deferred_heredocs = 0;
-}
-
-static void
-print_function_def (func)
- FUNCTION_DEF *func;
-{
- COMMAND *cmdcopy;
- REDIRECT *func_redirects;
-
- func_redirects = NULL;
- cprintf ("function %s () \n", func->name->word);
- add_unwind_protect (reset_locals, 0);
-
- indent (indentation);
- cprintf ("{ \n");
-
- inside_function_def++;
- indentation += indentation_amount;
-
- cmdcopy = copy_command (func->command);
- if (cmdcopy->type == cm_group)
- {
- func_redirects = cmdcopy->redirects;
- cmdcopy->redirects = (REDIRECT *)NULL;
- }
- make_command_string_internal (cmdcopy->type == cm_group
- ? cmdcopy->value.Group->command
- : cmdcopy);
-
- remove_unwind_protect ();
- indentation -= indentation_amount;
- inside_function_def--;
-
- if (func_redirects)
- { /* { */
- newline ("} ");
- print_redirection_list (func_redirects);
- cmdcopy->redirects = func_redirects;
- }
- else
- newline ("}");
-
- dispose_command (cmdcopy);
-}
-
-/* Return the string representation of the named function.
- NAME is the name of the function.
- COMMAND is the function body. It should be a GROUP_COM.
- flags&FUNC_MULTILINE is non-zero to pretty-print, or zero for all on one line.
- flags&FUNC_EXTERNAL means convert from internal to external form
- */
-char *
-named_function_string (name, command, flags)
- char *name;
- COMMAND *command;
- int flags;
-{
- char *result;
- int old_indent, old_amount;
- COMMAND *cmdcopy;
- REDIRECT *func_redirects;
-
- old_indent = indentation;
- old_amount = indentation_amount;
- command_string_index = was_heredoc = 0;
- deferred_heredocs = 0;
-
- if (name && *name)
- cprintf ("%s ", name);
-
- cprintf ("() ");
-
- if ((flags & FUNC_MULTILINE) == 0)
- {
- indentation = 1;
- indentation_amount = 0;
- }
- else
- {
- cprintf ("\n");
- indentation += indentation_amount;
- }
-
- inside_function_def++;
-
- cprintf ((flags & FUNC_MULTILINE) ? "{ \n" : "{ ");
-
- cmdcopy = copy_command (command);
- /* Take any redirections specified in the function definition (which should
- apply to the function as a whole) and save them for printing later. */
- func_redirects = (REDIRECT *)NULL;
- if (cmdcopy->type == cm_group)
- {
- func_redirects = cmdcopy->redirects;
- cmdcopy->redirects = (REDIRECT *)NULL;
- }
- make_command_string_internal (cmdcopy->type == cm_group
- ? cmdcopy->value.Group->command
- : cmdcopy);
-
- indentation = old_indent;
- indentation_amount = old_amount;
- inside_function_def--;
-
- if (func_redirects)
- { /* { */
- newline ("} ");
- print_redirection_list (func_redirects);
- cmdcopy->redirects = func_redirects;
- }
- else
- newline ("}");
-
- result = the_printed_command;
-
- if ((flags & FUNC_MULTILINE) == 0)
- {
-#if 0
- register int i;
- for (i = 0; result[i]; i++)
- if (result[i] == '\n')
- {
- strcpy (result + i, result + i + 1);
- --i;
- }
-#else
- if (result[2] == '\n') /* XXX -- experimental */
- strcpy (result + 2, result + 3);
-#endif
- }
-
- dispose_command (cmdcopy);
-
- if (flags & FUNC_EXTERNAL)
- result = remove_quoted_escapes (result);
-
- return (result);
-}
-
-static void
-newline (string)
- char *string;
-{
- cprintf ("\n");
- indent (indentation);
- if (string && *string)
- cprintf ("%s", string);
-}
-
-static char *indentation_string;
-static int indentation_size;
-
-static void
-indent (amount)
- int amount;
-{
- register int i;
-
- RESIZE_MALLOCED_BUFFER (indentation_string, 0, amount, indentation_size, 16);
-
- for (i = 0; amount > 0; amount--)
- indentation_string[i++] = ' ';
- indentation_string[i] = '\0';
- cprintf (indentation_string);
-}
-
-static void
-semicolon ()
-{
- if (command_string_index > 0 &&
- (the_printed_command[command_string_index - 1] == '&' ||
- the_printed_command[command_string_index - 1] == '\n'))
- return;
- cprintf (";");
-}
-
-/* How to make the string. */
-static void
-#if defined (PREFER_STDARG)
-cprintf (const char *control, ...)
-#else
-cprintf (control, va_alist)
- const char *control;
- va_dcl
-#endif
-{
- register const char *s;
- char char_arg[2], *argp, intbuf[INT_STRLEN_BOUND (int) + 1];
- int digit_arg, arg_len, c;
- va_list args;
-
- SH_VA_START (args, control);
-
- arg_len = strlen (control);
- the_printed_command_resize (arg_len + 1);
-
- char_arg[1] = '\0';
- s = control;
- while (s && *s)
- {
- c = *s++;
- argp = (char *)NULL;
- if (c != '%' || !*s)
- {
- char_arg[0] = c;
- argp = char_arg;
- arg_len = 1;
- }
- else
- {
- c = *s++;
- switch (c)
- {
- case '%':
- char_arg[0] = c;
- argp = char_arg;
- arg_len = 1;
- break;
-
- case 's':
- argp = va_arg (args, char *);
- arg_len = strlen (argp);
- break;
-
- case 'd':
- /* Represent an out-of-range file descriptor with an out-of-range
- integer value. We can do this because the only use of `%d' in
- the calls to cprintf is to output a file descriptor number for
- a redirection. */
- digit_arg = va_arg (args, int);
- if (digit_arg < 0)
- {
- sprintf (intbuf, "%u", (unsigned)-1);
- argp = intbuf;
- }
- else
- argp = inttostr (digit_arg, intbuf, sizeof (intbuf));
- arg_len = strlen (argp);
- break;
-
- case 'c':
- char_arg[0] = va_arg (args, int);
- argp = char_arg;
- arg_len = 1;
- break;
-
- default:
- programming_error (_("cprintf: `%c': invalid format character"), c);
- /*NOTREACHED*/
- }
- }
-
- if (argp && arg_len)
- {
- the_printed_command_resize (arg_len + 1);
- FASTCOPY (argp, the_printed_command + command_string_index, arg_len);
- command_string_index += arg_len;
- }
- }
-
- the_printed_command[command_string_index] = '\0';
-}
-
-/* Ensure that there is enough space to stuff LENGTH characters into
- THE_PRINTED_COMMAND. */
-static void
-the_printed_command_resize (length)
- int length;
-{
- if (the_printed_command == 0)
- {
- the_printed_command_size = (length + PRINTED_COMMAND_INITIAL_SIZE - 1) & ~(PRINTED_COMMAND_INITIAL_SIZE - 1);
- the_printed_command = (char *)xmalloc (the_printed_command_size);
- command_string_index = 0;
- }
- else if ((command_string_index + length) >= the_printed_command_size)
- {
- int new;
- new = command_string_index + length + 1;
-
- /* Round up to the next multiple of PRINTED_COMMAND_GROW_SIZE. */
- new = (new + PRINTED_COMMAND_GROW_SIZE - 1) & ~(PRINTED_COMMAND_GROW_SIZE - 1);
- the_printed_command_size = new;
-
- the_printed_command = (char *)xrealloc (the_printed_command, the_printed_command_size);
- }
-}
-
-#if defined (HAVE_VPRINTF)
-/* ``If vprintf is available, you may assume that vfprintf and vsprintf are
- also available.'' */
-
-static void
-#if defined (PREFER_STDARG)
-xprintf (const char *format, ...)
-#else
-xprintf (format, va_alist)
- const char *format;
- va_dcl
-#endif
-{
- va_list args;
-
- SH_VA_START (args, format);
-
- vfprintf (stdout, format, args);
- va_end (args);
-}
-
-#else
-
-static void
-xprintf (format, arg1, arg2, arg3, arg4, arg5)
- const char *format;
-{
- printf (format, arg1, arg2, arg3, arg4, arg5);
-}
-
-#endif /* !HAVE_VPRINTF */
+++ /dev/null
-/* shell.c -- GNU's idea of the POSIX shell specification. */
-
-/* Copyright (C) 1987-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/*
- Birthdate:
- Sunday, January 10th, 1988.
- Initial author: Brian Fox
-*/
-#define INSTALL_DEBUG_MODE
-
-#include "config.h"
-
-#include "bashtypes.h"
-#if !defined (_MINIX) && defined (HAVE_SYS_FILE_H)
-# include <sys/file.h>
-#endif
-#include "posixstat.h"
-#include "posixtime.h"
-#include "bashansi.h"
-#include <stdio.h>
-#include <signal.h>
-#include <errno.h>
-#include "filecntl.h"
-#include <pwd.h>
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include "bashintl.h"
-
-#define NEED_SH_SETLINEBUF_DECL /* used in externs.h */
-
-#include "shell.h"
-#include "flags.h"
-#include "trap.h"
-#include "mailcheck.h"
-#include "builtins.h"
-#include "builtins/common.h"
-
-#if defined (JOB_CONTROL)
-#include "jobs.h"
-#endif /* JOB_CONTROL */
-
-#include "input.h"
-#include "execute_cmd.h"
-#include "findcmd.h"
-
-#if defined (USING_BASH_MALLOC) && defined (DEBUG) && !defined (DISABLE_MALLOC_WRAPPERS)
-# include <malloc/shmalloc.h>
-#endif
-
-#if defined (HISTORY)
-# include "bashhist.h"
-# include <readline/history.h>
-#endif
-
-#if defined (READLINE)
-# include "bashline.h"
-#endif
-
-#include <tilde/tilde.h>
-#include <glob/strmatch.h>
-
-#if defined (__OPENNT)
-# include <opennt/opennt.h>
-#endif
-
-#if !defined (HAVE_GETPW_DECLS)
-extern struct passwd *getpwuid ();
-#endif /* !HAVE_GETPW_DECLS */
-
-#if !defined (errno)
-extern int errno;
-#endif
-
-#if defined (NO_MAIN_ENV_ARG)
-extern char **environ; /* used if no third argument to main() */
-#endif
-
-extern char *dist_version, *release_status;
-extern int patch_level, build_version;
-extern int shell_level;
-extern int subshell_environment;
-extern int last_command_exit_value;
-extern int line_number;
-extern int expand_aliases;
-extern int array_needs_making;
-extern int gnu_error_format;
-extern char *primary_prompt, *secondary_prompt;
-extern char *this_command_name;
-
-/* Non-zero means that this shell has already been run; i.e. you should
- call shell_reinitialize () if you need to start afresh. */
-int shell_initialized = 0;
-
-COMMAND *global_command = (COMMAND *)NULL;
-
-/* Information about the current user. */
-struct user_info current_user =
-{
- (uid_t)-1, (uid_t)-1, (gid_t)-1, (gid_t)-1,
- (char *)NULL, (char *)NULL, (char *)NULL
-};
-
-/* The current host's name. */
-char *current_host_name = (char *)NULL;
-
-/* Non-zero means that this shell is a login shell.
- Specifically:
- 0 = not login shell.
- 1 = login shell from getty (or equivalent fake out)
- -1 = login shell from "--login" (or -l) flag.
- -2 = both from getty, and from flag.
- */
-int login_shell = 0;
-
-/* Non-zero means that at this moment, the shell is interactive. In
- general, this means that the shell is at this moment reading input
- from the keyboard. */
-int interactive = 0;
-
-/* Non-zero means that the shell was started as an interactive shell. */
-int interactive_shell = 0;
-
-/* Non-zero means to send a SIGHUP to all jobs when an interactive login
- shell exits. */
-int hup_on_exit = 0;
-
-/* Non-zero means to list status of running and stopped jobs at shell exit */
-int check_jobs_at_exit = 0;
-
-/* Non-zero means to change to a directory name supplied as a command name */
-int autocd = 0;
-
-/* Tells what state the shell was in when it started:
- 0 = non-interactive shell script
- 1 = interactive
- 2 = -c command
- 3 = wordexp evaluation
- This is a superset of the information provided by interactive_shell.
-*/
-int startup_state = 0;
-
-/* Special debugging helper. */
-int debugging_login_shell = 0;
-
-/* The environment that the shell passes to other commands. */
-char **shell_environment;
-
-/* Non-zero when we are executing a top-level command. */
-int executing = 0;
-
-/* The number of commands executed so far. */
-int current_command_number = 1;
-
-/* Non-zero is the recursion depth for commands. */
-int indirection_level = 0;
-
-/* The name of this shell, as taken from argv[0]. */
-char *shell_name = (char *)NULL;
-
-/* time in seconds when the shell was started */
-time_t shell_start_time;
-
-/* Are we running in an emacs shell window? */
-int running_under_emacs;
-
-/* Do we have /dev/fd? */
-#ifdef HAVE_DEV_FD
-int have_devfd = HAVE_DEV_FD;
-#else
-int have_devfd = 0;
-#endif
-
-/* The name of the .(shell)rc file. */
-static char *bashrc_file = "~/.bashrc";
-
-/* Non-zero means to act more like the Bourne shell on startup. */
-static int act_like_sh;
-
-/* Non-zero if this shell is being run by `su'. */
-static int su_shell;
-
-/* Non-zero if we have already expanded and sourced $ENV. */
-static int sourced_env;
-
-/* Is this shell running setuid? */
-static int running_setuid;
-
-/* Values for the long-winded argument names. */
-static int debugging; /* Do debugging things. */
-static int no_rc; /* Don't execute ~/.bashrc */
-static int no_profile; /* Don't execute .profile */
-static int do_version; /* Display interesting version info. */
-static int make_login_shell; /* Make this shell be a `-bash' shell. */
-static int want_initial_help; /* --help option */
-
-int debugging_mode = 0; /* In debugging mode with --debugger */
-int no_line_editing = 0; /* Don't do fancy line editing. */
-int dump_translatable_strings; /* Dump strings in $"...", don't execute. */
-int dump_po_strings; /* Dump strings in $"..." in po format */
-int wordexp_only = 0; /* Do word expansion only */
-int protected_mode = 0; /* No command substitution with --wordexp */
-
-#if defined (STRICT_POSIX)
-int posixly_correct = 1; /* Non-zero means posix.2 superset. */
-#else
-int posixly_correct = 0; /* Non-zero means posix.2 superset. */
-#endif
-
-/* Some long-winded argument names. These are obviously new. */
-#define Int 1
-#define Charp 2
-static const struct {
- const char *name;
- int type;
- int *int_value;
- char **char_value;
-} long_args[] = {
- { "debug", Int, &debugging, (char **)0x0 },
-#if defined (DEBUGGER)
- { "debugger", Int, &debugging_mode, (char **)0x0 },
-#endif
- { "dump-po-strings", Int, &dump_po_strings, (char **)0x0 },
- { "dump-strings", Int, &dump_translatable_strings, (char **)0x0 },
- { "help", Int, &want_initial_help, (char **)0x0 },
- { "init-file", Charp, (int *)0x0, &bashrc_file },
- { "login", Int, &make_login_shell, (char **)0x0 },
- { "noediting", Int, &no_line_editing, (char **)0x0 },
- { "noprofile", Int, &no_profile, (char **)0x0 },
- { "norc", Int, &no_rc, (char **)0x0 },
- { "posix", Int, &posixly_correct, (char **)0x0 },
- { "protected", Int, &protected_mode, (char **)0x0 },
- { "rcfile", Charp, (int *)0x0, &bashrc_file },
-#if defined (RESTRICTED_SHELL)
- { "restricted", Int, &restricted, (char **)0x0 },
-#endif
- { "verbose", Int, &echo_input_at_read, (char **)0x0 },
- { "version", Int, &do_version, (char **)0x0 },
-#if defined (WORDEXP_OPTION)
- { "wordexp", Int, &wordexp_only, (char **)0x0 },
-#endif
- { (char *)0x0, Int, (int *)0x0, (char **)0x0 }
-};
-
-/* These are extern so execute_simple_command can set them, and then
- longjmp back to main to execute a shell script, instead of calling
- main () again and resulting in indefinite, possibly fatal, stack
- growth. */
-procenv_t subshell_top_level;
-int subshell_argc;
-char **subshell_argv;
-char **subshell_envp;
-
-char *exec_argv0;
-
-#if defined (BUFFERED_INPUT)
-/* The file descriptor from which the shell is reading input. */
-int default_buffered_input = -1;
-#endif
-
-/* The following two variables are not static so they can show up in $-. */
-int read_from_stdin; /* -s flag supplied */
-int want_pending_command; /* -c flag supplied */
-
-/* This variable is not static so it can be bound to $BASH_EXECUTION_STRING */
-char *command_execution_string; /* argument to -c option */
-
-int malloc_trace_at_exit = 0;
-
-static int shell_reinitialized = 0;
-
-static FILE *default_input;
-
-static STRING_INT_ALIST *shopt_alist;
-static int shopt_ind = 0, shopt_len = 0;
-
-static int parse_long_options __P((char **, int, int));
-static int parse_shell_options __P((char **, int, int));
-static int bind_args __P((char **, int, int, int));
-
-static void start_debugger __P((void));
-
-static void add_shopt_to_alist __P((char *, int));
-static void run_shopt_alist __P((void));
-
-static void execute_env_file __P((char *));
-static void run_startup_files __P((void));
-static int open_shell_script __P((char *));
-static void set_bash_input __P((void));
-static int run_one_command __P((char *));
-#if defined (WORDEXP_OPTION)
-static int run_wordexp __P((char *));
-#endif
-
-static int uidget __P((void));
-
-static void init_interactive __P((void));
-static void init_noninteractive __P((void));
-static void init_interactive_script __P((void));
-
-static void set_shell_name __P((char *));
-static void shell_initialize __P((void));
-static void shell_reinitialize __P((void));
-
-static void show_shell_usage __P((FILE *, int));
-
-#ifdef __CYGWIN__
-static void
-_cygwin32_check_tmp ()
-{
- struct stat sb;
-
- if (stat ("/tmp", &sb) < 0)
- internal_warning (_("could not find /tmp, please create!"));
- else
- {
- if (S_ISDIR (sb.st_mode) == 0)
- internal_warning (_("/tmp must be a valid directory name"));
- }
-}
-#endif /* __CYGWIN__ */
-
-#if defined (NO_MAIN_ENV_ARG)
-/* systems without third argument to main() */
-int
-main (argc, argv)
- int argc;
- char **argv;
-#else /* !NO_MAIN_ENV_ARG */
-int
-main (argc, argv, env)
- int argc;
- char **argv, **env;
-#endif /* !NO_MAIN_ENV_ARG */
-{
- register int i;
- int code, old_errexit_flag;
-#if defined (RESTRICTED_SHELL)
- int saverst;
-#endif
- volatile int locally_skip_execution;
- volatile int arg_index, top_level_arg_index;
-#ifdef __OPENNT
- char **env;
-
- env = environ;
-#endif /* __OPENNT */
-
- USE_VAR(argc);
- USE_VAR(argv);
- USE_VAR(env);
- USE_VAR(code);
- USE_VAR(old_errexit_flag);
-#if defined (RESTRICTED_SHELL)
- USE_VAR(saverst);
-#endif
-
- /* Catch early SIGINTs. */
- code = setjmp (top_level);
- if (code)
- exit (2);
-
- xtrace_init ();
-
-#if defined (USING_BASH_MALLOC) && defined (DEBUG) && !defined (DISABLE_MALLOC_WRAPPERS)
-# if 1
- malloc_set_register (1);
-# endif
-#endif
-
- check_dev_tty ();
-
-#ifdef __CYGWIN__
- _cygwin32_check_tmp ();
-#endif /* __CYGWIN__ */
-
- /* Wait forever if we are debugging a login shell. */
- while (debugging_login_shell) sleep (3);
-
- set_default_locale ();
-
- running_setuid = uidget ();
-
- if (getenv ("POSIXLY_CORRECT") || getenv ("POSIX_PEDANTIC"))
- posixly_correct = 1;
-
-#if defined (USE_GNU_MALLOC_LIBRARY)
- mcheck (programming_error, (void (*) ())0);
-#endif /* USE_GNU_MALLOC_LIBRARY */
-
- if (setjmp (subshell_top_level))
- {
- argc = subshell_argc;
- argv = subshell_argv;
- env = subshell_envp;
- sourced_env = 0;
- }
-
- shell_reinitialized = 0;
-
- /* Initialize `local' variables for all `invocations' of main (). */
- arg_index = 1;
- if (arg_index > argc)
- arg_index = argc;
- command_execution_string = (char *)NULL;
- want_pending_command = locally_skip_execution = read_from_stdin = 0;
- default_input = stdin;
-#if defined (BUFFERED_INPUT)
- default_buffered_input = -1;
-#endif
-
- /* Fix for the `infinite process creation' bug when running shell scripts
- from startup files on System V. */
- login_shell = make_login_shell = 0;
-
- /* If this shell has already been run, then reinitialize it to a
- vanilla state. */
- if (shell_initialized || shell_name)
- {
- /* Make sure that we do not infinitely recurse as a login shell. */
- if (*shell_name == '-')
- shell_name++;
-
- shell_reinitialize ();
- if (setjmp (top_level))
- exit (2);
- }
-
- shell_environment = env;
- set_shell_name (argv[0]);
- shell_start_time = NOW; /* NOW now defined in general.h */
-
- /* Parse argument flags from the input line. */
-
- /* Find full word arguments first. */
- arg_index = parse_long_options (argv, arg_index, argc);
-
- if (want_initial_help)
- {
- show_shell_usage (stdout, 1);
- exit (EXECUTION_SUCCESS);
- }
-
- if (do_version)
- {
- show_shell_version (1);
- exit (EXECUTION_SUCCESS);
- }
-
- /* All done with full word options; do standard shell option parsing.*/
- this_command_name = shell_name; /* for error reporting */
- arg_index = parse_shell_options (argv, arg_index, argc);
-
- /* If user supplied the "--login" (or -l) flag, then set and invert
- LOGIN_SHELL. */
- if (make_login_shell)
- {
- login_shell++;
- login_shell = -login_shell;
- }
-
- set_login_shell ("login_shell", login_shell != 0);
-
- if (dump_po_strings)
- dump_translatable_strings = 1;
-
- if (dump_translatable_strings)
- read_but_dont_execute = 1;
-
- if (running_setuid && privileged_mode == 0)
- disable_priv_mode ();
-
- /* Need to get the argument to a -c option processed in the
- above loop. The next arg is a command to execute, and the
- following args are $0...$n respectively. */
- if (want_pending_command)
- {
- command_execution_string = argv[arg_index];
- if (command_execution_string == 0)
- {
- report_error (_("%s: option requires an argument"), "-c");
- exit (EX_BADUSAGE);
- }
- arg_index++;
- }
- this_command_name = (char *)NULL;
-
- cmd_init(); /* initialize the command object caches */
-
- /* First, let the outside world know about our interactive status.
- A shell is interactive if the `-i' flag was given, or if all of
- the following conditions are met:
- no -c command
- no arguments remaining or the -s flag given
- standard input is a terminal
- standard error is a terminal
- Refer to Posix.2, the description of the `sh' utility. */
-
- if (forced_interactive || /* -i flag */
- (!command_execution_string && /* No -c command and ... */
- wordexp_only == 0 && /* No --wordexp and ... */
- ((arg_index == argc) || /* no remaining args or... */
- read_from_stdin) && /* -s flag with args, and */
- isatty (fileno (stdin)) && /* Input is a terminal and */
- isatty (fileno (stderr)))) /* error output is a terminal. */
- init_interactive ();
- else
- init_noninteractive ();
-
- /*
- * Some systems have the bad habit of starting login shells with lots of open
- * file descriptors. For instance, most systems that have picked up the
- * pre-4.0 Sun YP code leave a file descriptor open each time you call one
- * of the getpw* functions, and it's set to be open across execs. That
- * means one for login, one for xterm, one for shelltool, etc. There are
- * also systems that open persistent FDs to other agents or files as part
- * of process startup; these need to be set to be close-on-exec.
- */
- if (login_shell && interactive_shell)
- {
- for (i = 3; i < 20; i++)
- SET_CLOSE_ON_EXEC (i);
- }
-
- /* If we're in a strict Posix.2 mode, turn on interactive comments,
- alias expansion in non-interactive shells, and other Posix.2 things. */
- if (posixly_correct)
- {
- bind_variable ("POSIXLY_CORRECT", "y", 0);
- sv_strict_posix ("POSIXLY_CORRECT");
- }
-
- /* Now we run the shopt_alist and process the options. */
- if (shopt_alist)
- run_shopt_alist ();
-
- /* From here on in, the shell must be a normal functioning shell.
- Variables from the environment are expected to be set, etc. */
- shell_initialize ();
-
- set_default_lang ();
- set_default_locale_vars ();
-
- /*
- * M-x term -> TERM=eterm EMACS=22.1 (term:0.96) (eterm)
- * M-x shell -> TERM=dumb EMACS=t (no line editing)
- * M-x terminal -> TERM=emacs-em7955 EMACS= (line editing)
- */
- if (interactive_shell)
- {
- char *term, *emacs;
-
- term = get_string_value ("TERM");
- emacs = get_string_value ("EMACS");
-
- /* Not sure any emacs terminal emulator sets TERM=emacs any more */
- no_line_editing |= term && (STREQ (term, "emacs"));
- no_line_editing |= emacs && emacs[0] == 't' && emacs[1] == '\0' && STREQ (term, "dumb");
-
- /* running_under_emacs == 2 for `eterm' */
- running_under_emacs = (emacs != 0) || (term && STREQN (term, "emacs", 5));
- running_under_emacs += term && STREQN (term, "eterm", 5) && emacs && strstr (emacs, "term");
-
- if (running_under_emacs)
- gnu_error_format = 1;
- }
-
- top_level_arg_index = arg_index;
- old_errexit_flag = exit_immediately_on_error;
-
- /* Give this shell a place to longjmp to before executing the
- startup files. This allows users to press C-c to abort the
- lengthy startup. */
- code = setjmp (top_level);
- if (code)
- {
- if (code == EXITPROG || code == ERREXIT)
- exit_shell (last_command_exit_value);
- else
- {
-#if defined (JOB_CONTROL)
- /* Reset job control, since run_startup_files turned it off. */
- set_job_control (interactive_shell);
-#endif
- /* Reset value of `set -e', since it's turned off before running
- the startup files. */
- exit_immediately_on_error += old_errexit_flag;
- locally_skip_execution++;
- }
- }
-
- arg_index = top_level_arg_index;
-
- /* Execute the start-up scripts. */
-
- if (interactive_shell == 0)
- {
- unbind_variable ("PS1");
- unbind_variable ("PS2");
- interactive = 0;
-#if 0
- /* This has already been done by init_noninteractive */
- expand_aliases = posixly_correct;
-#endif
- }
- else
- {
- change_flag ('i', FLAG_ON);
- interactive = 1;
- }
-
-#if defined (RESTRICTED_SHELL)
- /* Set restricted_shell based on whether the basename of $0 indicates that
- the shell should be restricted or if the `-r' option was supplied at
- startup. */
- restricted_shell = shell_is_restricted (shell_name);
-
- /* If the `-r' option is supplied at invocation, make sure that the shell
- is not in restricted mode when running the startup files. */
- saverst = restricted;
- restricted = 0;
-#endif
-
- /* The startup files are run with `set -e' temporarily disabled. */
- if (locally_skip_execution == 0 && running_setuid == 0)
- {
- old_errexit_flag = exit_immediately_on_error;
- exit_immediately_on_error = 0;
-
- run_startup_files ();
- exit_immediately_on_error += old_errexit_flag;
- }
-
- /* If we are invoked as `sh', turn on Posix mode. */
- if (act_like_sh)
- {
- bind_variable ("POSIXLY_CORRECT", "y", 0);
- sv_strict_posix ("POSIXLY_CORRECT");
- }
-
-#if defined (RESTRICTED_SHELL)
- /* Turn on the restrictions after executing the startup files. This
- means that `bash -r' or `set -r' invoked from a startup file will
- turn on the restrictions after the startup files are executed. */
- restricted = saverst || restricted;
- if (shell_reinitialized == 0)
- maybe_make_restricted (shell_name);
-#endif /* RESTRICTED_SHELL */
-
-#if defined (WORDEXP_OPTION)
- if (wordexp_only)
- {
- startup_state = 3;
- last_command_exit_value = run_wordexp (argv[arg_index]);
- exit_shell (last_command_exit_value);
- }
-#endif
-
- if (command_execution_string)
- {
- arg_index = bind_args (argv, arg_index, argc, 0);
- startup_state = 2;
-
- if (debugging_mode)
- start_debugger ();
-
-#if defined (ONESHOT)
- executing = 1;
- run_one_command (command_execution_string);
- exit_shell (last_command_exit_value);
-#else /* ONESHOT */
- with_input_from_string (command_execution_string, "-c");
- goto read_and_execute;
-#endif /* !ONESHOT */
- }
-
- /* Get possible input filename and set up default_buffered_input or
- default_input as appropriate. */
- if (arg_index != argc && read_from_stdin == 0)
- {
- open_shell_script (argv[arg_index]);
- arg_index++;
- }
- else if (interactive == 0)
- /* In this mode, bash is reading a script from stdin, which is a
- pipe or redirected file. */
-#if defined (BUFFERED_INPUT)
- default_buffered_input = fileno (stdin); /* == 0 */
-#else
- setbuf (default_input, (char *)NULL);
-#endif /* !BUFFERED_INPUT */
-
- set_bash_input ();
-
- /* Bind remaining args to $1 ... $n */
- arg_index = bind_args (argv, arg_index, argc, 1);
-
- if (debugging_mode && locally_skip_execution == 0 && running_setuid == 0)
- start_debugger ();
-
- /* Do the things that should be done only for interactive shells. */
- if (interactive_shell)
- {
- /* Set up for checking for presence of mail. */
- reset_mail_timer ();
- init_mail_dates ();
-
-#if defined (HISTORY)
- /* Initialize the interactive history stuff. */
- bash_initialize_history ();
- /* Don't load the history from the history file if we've already
- saved some lines in this session (e.g., by putting `history -s xx'
- into one of the startup files). */
- if (shell_initialized == 0 && history_lines_this_session == 0)
- load_history ();
-#endif /* HISTORY */
-
- /* Initialize terminal state for interactive shells after the
- .bash_profile and .bashrc are interpreted. */
- get_tty_state ();
- }
-
-#if !defined (ONESHOT)
- read_and_execute:
-#endif /* !ONESHOT */
-
- shell_initialized = 1;
-
- /* Read commands until exit condition. */
- reader_loop ();
- exit_shell (last_command_exit_value);
-}
-
-static int
-parse_long_options (argv, arg_start, arg_end)
- char **argv;
- int arg_start, arg_end;
-{
- int arg_index, longarg, i;
- char *arg_string;
-
- arg_index = arg_start;
- while ((arg_index != arg_end) && (arg_string = argv[arg_index]) &&
- (*arg_string == '-'))
- {
- longarg = 0;
-
- /* Make --login equivalent to -login. */
- if (arg_string[1] == '-' && arg_string[2])
- {
- longarg = 1;
- arg_string++;
- }
-
- for (i = 0; long_args[i].name; i++)
- {
- if (STREQ (arg_string + 1, long_args[i].name))
- {
- if (long_args[i].type == Int)
- *long_args[i].int_value = 1;
- else if (argv[++arg_index] == 0)
- {
- report_error (_("%s: option requires an argument"), long_args[i].name);
- exit (EX_BADUSAGE);
- }
- else
- *long_args[i].char_value = argv[arg_index];
-
- break;
- }
- }
- if (long_args[i].name == 0)
- {
- if (longarg)
- {
- report_error (_("%s: invalid option"), argv[arg_index]);
- show_shell_usage (stderr, 0);
- exit (EX_BADUSAGE);
- }
- break; /* No such argument. Maybe flag arg. */
- }
-
- arg_index++;
- }
-
- return (arg_index);
-}
-
-static int
-parse_shell_options (argv, arg_start, arg_end)
- char **argv;
- int arg_start, arg_end;
-{
- int arg_index;
- int arg_character, on_or_off, next_arg, i;
- char *o_option, *arg_string;
-
- arg_index = arg_start;
- while (arg_index != arg_end && (arg_string = argv[arg_index]) &&
- (*arg_string == '-' || *arg_string == '+'))
- {
- /* There are flag arguments, so parse them. */
- next_arg = arg_index + 1;
-
- /* A single `-' signals the end of options. From the 4.3 BSD sh.
- An option `--' means the same thing; this is the standard
- getopt(3) meaning. */
- if (arg_string[0] == '-' &&
- (arg_string[1] == '\0' ||
- (arg_string[1] == '-' && arg_string[2] == '\0')))
- return (next_arg);
-
- i = 1;
- on_or_off = arg_string[0];
- while (arg_character = arg_string[i++])
- {
- switch (arg_character)
- {
- case 'c':
- want_pending_command = 1;
- break;
-
- case 'l':
- make_login_shell = 1;
- break;
-
- case 's':
- read_from_stdin = 1;
- break;
-
- case 'o':
- o_option = argv[next_arg];
- if (o_option == 0)
- {
- list_minus_o_opts (-1, (on_or_off == '-') ? 0 : 1);
- break;
- }
- if (set_minus_o_option (on_or_off, o_option) != EXECUTION_SUCCESS)
- exit (EX_BADUSAGE);
- next_arg++;
- break;
-
- case 'O':
- /* Since some of these can be overridden by the normal
- interactive/non-interactive shell initialization or
- initializing posix mode, we save the options and process
- them after initialization. */
- o_option = argv[next_arg];
- if (o_option == 0)
- {
- shopt_listopt (o_option, (on_or_off == '-') ? 0 : 1);
- break;
- }
- add_shopt_to_alist (o_option, on_or_off);
- next_arg++;
- break;
-
- case 'D':
- dump_translatable_strings = 1;
- break;
-
- default:
- if (change_flag (arg_character, on_or_off) == FLAG_ERROR)
- {
- report_error (_("%c%c: invalid option"), on_or_off, arg_character);
- show_shell_usage (stderr, 0);
- exit (EX_BADUSAGE);
- }
- }
- }
- /* Can't do just a simple increment anymore -- what about
- "bash -abouo emacs ignoreeof -hP"? */
- arg_index = next_arg;
- }
-
- return (arg_index);
-}
-
-/* Exit the shell with status S. */
-void
-exit_shell (s)
- int s;
-{
- fflush (stdout); /* XXX */
- fflush (stderr);
-
- /* Do trap[0] if defined. Allow it to override the exit status
- passed to us. */
- if (signal_is_trapped (0))
- s = run_exit_trap ();
-
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
-
-#if defined (HISTORY)
- if (interactive_shell)
- maybe_save_shell_history ();
-#endif /* HISTORY */
-
-#if defined (COPROCESS_SUPPORT)
- coproc_flush ();
-#endif
-
-#if defined (JOB_CONTROL)
- /* If the user has run `shopt -s huponexit', hangup all jobs when we exit
- an interactive login shell. ksh does this unconditionally. */
- if (interactive_shell && login_shell && hup_on_exit)
- hangup_all_jobs ();
-
- /* If this shell is interactive, terminate all stopped jobs and
- restore the original terminal process group. Don't do this if we're
- in a subshell and calling exit_shell after, for example, a failed
- word expansion. */
- if (subshell_environment == 0)
- end_job_control ();
-#endif /* JOB_CONTROL */
-
- /* Always return the exit status of the last command to our parent. */
- sh_exit (s);
-}
-
-/* A wrapper for exit that (optionally) can do other things, like malloc
- statistics tracing. */
-void
-sh_exit (s)
- int s;
-{
-#if defined (MALLOC_DEBUG) && defined (USING_BASH_MALLOC)
- if (malloc_trace_at_exit)
- trace_malloc_stats (get_name_for_error (), (char *)NULL);
-#endif
-
- exit (s);
-}
-
-/* Source the bash startup files. If POSIXLY_CORRECT is non-zero, we obey
- the Posix.2 startup file rules: $ENV is expanded, and if the file it
- names exists, that file is sourced. The Posix.2 rules are in effect
- for interactive shells only. (section 4.56.5.3) */
-
-/* Execute ~/.bashrc for most shells. Never execute it if
- ACT_LIKE_SH is set, or if NO_RC is set.
-
- If the executable file "/usr/gnu/src/bash/foo" contains:
-
- #!/usr/gnu/bin/bash
- echo hello
-
- then:
-
- COMMAND EXECUTE BASHRC
- --------------------------------
- bash -c foo NO
- bash foo NO
- foo NO
- rsh machine ls YES (for rsh, which calls `bash -c')
- rsh machine foo YES (for shell started by rsh) NO (for foo!)
- echo ls | bash NO
- login NO
- bash YES
-*/
-
-static void
-execute_env_file (env_file)
- char *env_file;
-{
- char *fn;
-
- if (env_file && *env_file)
- {
- fn = expand_string_unsplit_to_string (env_file, Q_DOUBLE_QUOTES);
- if (fn && *fn)
- maybe_execute_file (fn, 1);
- FREE (fn);
- }
-}
-
-static void
-run_startup_files ()
-{
-#if defined (JOB_CONTROL)
- int old_job_control;
-#endif
- int sourced_login, run_by_ssh;
-
- /* get the rshd/sshd case out of the way first. */
- if (interactive_shell == 0 && no_rc == 0 && login_shell == 0 &&
- act_like_sh == 0 && command_execution_string)
- {
-#ifdef SSH_SOURCE_BASHRC
- run_by_ssh = (find_variable ("SSH_CLIENT") != (SHELL_VAR *)0) ||
- (find_variable ("SSH2_CLIENT") != (SHELL_VAR *)0);
-#else
- run_by_ssh = 0;
-#endif
-
- /* If we were run by sshd or we think we were run by rshd, execute
- ~/.bashrc if we are a top-level shell. */
- if ((run_by_ssh || isnetconn (fileno (stdin))) && shell_level < 2)
- {
-#ifdef SYS_BASHRC
-# if defined (__OPENNT)
- maybe_execute_file (_prefixInstallPath(SYS_BASHRC, NULL, 0), 1);
-# else
- maybe_execute_file (SYS_BASHRC, 1);
-# endif
-#endif
- maybe_execute_file (bashrc_file, 1);
- return;
- }
- }
-
-#if defined (JOB_CONTROL)
- /* Startup files should be run without job control enabled. */
- old_job_control = interactive_shell ? set_job_control (0) : 0;
-#endif
-
- sourced_login = 0;
-
- /* A shell begun with the --login (or -l) flag that is not in posix mode
- runs the login shell startup files, no matter whether or not it is
- interactive. If NON_INTERACTIVE_LOGIN_SHELLS is defined, run the
- startup files if argv[0][0] == '-' as well. */
-#if defined (NON_INTERACTIVE_LOGIN_SHELLS)
- if (login_shell && posixly_correct == 0)
-#else
- if (login_shell < 0 && posixly_correct == 0)
-#endif
- {
- /* We don't execute .bashrc for login shells. */
- no_rc++;
-
- /* Execute /etc/profile and one of the personal login shell
- initialization files. */
- if (no_profile == 0)
- {
- maybe_execute_file (SYS_PROFILE, 1);
-
- if (act_like_sh) /* sh */
- maybe_execute_file ("~/.profile", 1);
- else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) &&
- (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */
- maybe_execute_file ("~/.profile", 1);
- }
-
- sourced_login = 1;
- }
-
- /* A non-interactive shell not named `sh' and not in posix mode reads and
- executes commands from $BASH_ENV. If `su' starts a shell with `-c cmd'
- and `-su' as the name of the shell, we want to read the startup files.
- No other non-interactive shells read any startup files. */
- if (interactive_shell == 0 && !(su_shell && login_shell))
- {
- if (posixly_correct == 0 && act_like_sh == 0 && privileged_mode == 0 &&
- sourced_env++ == 0)
- execute_env_file (get_string_value ("BASH_ENV"));
- return;
- }
-
- /* Interactive shell or `-su' shell. */
- if (posixly_correct == 0) /* bash, sh */
- {
- if (login_shell && sourced_login++ == 0)
- {
- /* We don't execute .bashrc for login shells. */
- no_rc++;
-
- /* Execute /etc/profile and one of the personal login shell
- initialization files. */
- if (no_profile == 0)
- {
- maybe_execute_file (SYS_PROFILE, 1);
-
- if (act_like_sh) /* sh */
- maybe_execute_file ("~/.profile", 1);
- else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) &&
- (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */
- maybe_execute_file ("~/.profile", 1);
- }
- }
-
- /* bash */
- if (act_like_sh == 0 && no_rc == 0)
- {
-#ifdef SYS_BASHRC
-# if defined (__OPENNT)
- maybe_execute_file (_prefixInstallPath(SYS_BASHRC, NULL, 0), 1);
-# else
- maybe_execute_file (SYS_BASHRC, 1);
-# endif
-#endif
- maybe_execute_file (bashrc_file, 1);
- }
- /* sh */
- else if (act_like_sh && privileged_mode == 0 && sourced_env++ == 0)
- execute_env_file (get_string_value ("ENV"));
- }
- else /* bash --posix, sh --posix */
- {
- /* bash and sh */
- if (interactive_shell && privileged_mode == 0 && sourced_env++ == 0)
- execute_env_file (get_string_value ("ENV"));
- }
-
-#if defined (JOB_CONTROL)
- set_job_control (old_job_control);
-#endif
-}
-
-#if defined (RESTRICTED_SHELL)
-/* Return 1 if the shell should be a restricted one based on NAME or the
- value of `restricted'. Don't actually do anything, just return a
- boolean value. */
-int
-shell_is_restricted (name)
- char *name;
-{
- char *temp;
-
- if (restricted)
- return 1;
- temp = base_pathname (name);
- if (*temp == '-')
- temp++;
- return (STREQ (temp, RESTRICTED_SHELL_NAME));
-}
-
-/* Perhaps make this shell a `restricted' one, based on NAME. If the
- basename of NAME is "rbash", then this shell is restricted. The
- name of the restricted shell is a configurable option, see config.h.
- In a restricted shell, PATH, SHELL, ENV, and BASH_ENV are read-only
- and non-unsettable.
- Do this also if `restricted' is already set to 1; maybe the shell was
- started with -r. */
-int
-maybe_make_restricted (name)
- char *name;
-{
- char *temp;
-
- temp = base_pathname (name);
- if (*temp == '-')
- temp++;
- if (restricted || (STREQ (temp, RESTRICTED_SHELL_NAME)))
- {
- set_var_read_only ("PATH");
- set_var_read_only ("SHELL");
- set_var_read_only ("ENV");
- set_var_read_only ("BASH_ENV");
- restricted = 1;
- }
- return (restricted);
-}
-#endif /* RESTRICTED_SHELL */
-
-/* Fetch the current set of uids and gids and return 1 if we're running
- setuid or setgid. */
-static int
-uidget ()
-{
- uid_t u;
-
- u = getuid ();
- if (current_user.uid != u)
- {
- FREE (current_user.user_name);
- FREE (current_user.shell);
- FREE (current_user.home_dir);
- current_user.user_name = current_user.shell = current_user.home_dir = (char *)NULL;
- }
- current_user.uid = u;
- current_user.gid = getgid ();
- current_user.euid = geteuid ();
- current_user.egid = getegid ();
-
- /* See whether or not we are running setuid or setgid. */
- return (current_user.uid != current_user.euid) ||
- (current_user.gid != current_user.egid);
-}
-
-void
-disable_priv_mode ()
-{
- setuid (current_user.uid);
- setgid (current_user.gid);
- current_user.euid = current_user.uid;
- current_user.egid = current_user.gid;
-}
-
-#if defined (WORDEXP_OPTION)
-static int
-run_wordexp (words)
- char *words;
-{
- int code, nw, nb;
- WORD_LIST *wl, *tl, *result;
-
- code = setjmp (top_level);
-
- if (code != NOT_JUMPED)
- {
- switch (code)
- {
- /* Some kind of throw to top_level has occured. */
- case FORCE_EOF:
- return last_command_exit_value = 127;
- case ERREXIT:
- case EXITPROG:
- return last_command_exit_value;
- case DISCARD:
- return last_command_exit_value = 1;
- default:
- command_error ("run_wordexp", CMDERR_BADJUMP, code, 0);
- }
- }
-
- /* Run it through the parser to get a list of words and expand them */
- if (words && *words)
- {
- with_input_from_string (words, "--wordexp");
- if (parse_command () != 0)
- return (126);
- if (global_command == 0)
- {
- printf ("0\n0\n");
- return (0);
- }
- if (global_command->type != cm_simple)
- return (126);
- wl = global_command->value.Simple->words;
- if (protected_mode)
- for (tl = wl; tl; tl = tl->next)
- tl->word->flags |= W_NOCOMSUB|W_NOPROCSUB;
- result = wl ? expand_words_no_vars (wl) : (WORD_LIST *)0;
- }
- else
- result = (WORD_LIST *)0;
-
- last_command_exit_value = 0;
-
- if (result == 0)
- {
- printf ("0\n0\n");
- return (0);
- }
-
- /* Count up the number of words and bytes, and print them. Don't count
- the trailing NUL byte. */
- for (nw = nb = 0, wl = result; wl; wl = wl->next)
- {
- nw++;
- nb += strlen (wl->word->word);
- }
- printf ("%u\n%u\n", nw, nb);
- /* Print each word on a separate line. This will have to be changed when
- the interface to glibc is completed. */
- for (wl = result; wl; wl = wl->next)
- printf ("%s\n", wl->word->word);
-
- return (0);
-}
-#endif
-
-#if defined (ONESHOT)
-/* Run one command, given as the argument to the -c option. Tell
- parse_and_execute not to fork for a simple command. */
-static int
-run_one_command (command)
- char *command;
-{
- int code;
-
- code = setjmp (top_level);
-
- if (code != NOT_JUMPED)
- {
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
- switch (code)
- {
- /* Some kind of throw to top_level has occured. */
- case FORCE_EOF:
- return last_command_exit_value = 127;
- case ERREXIT:
- case EXITPROG:
- return last_command_exit_value;
- case DISCARD:
- return last_command_exit_value = 1;
- default:
- command_error ("run_one_command", CMDERR_BADJUMP, code, 0);
- }
- }
- return (parse_and_execute (savestring (command), "-c", SEVAL_NOHIST));
-}
-#endif /* ONESHOT */
-
-static int
-bind_args (argv, arg_start, arg_end, start_index)
- char **argv;
- int arg_start, arg_end, start_index;
-{
- register int i;
- WORD_LIST *args;
-
- for (i = arg_start, args = (WORD_LIST *)NULL; i < arg_end; i++)
- args = make_word_list (make_word (argv[i]), args);
- if (args)
- {
- args = REVERSE_LIST (args, WORD_LIST *);
- if (start_index == 0) /* bind to $0...$n for sh -c command */
- {
- /* Posix.2 4.56.3 says that the first argument after sh -c command
- becomes $0, and the rest of the arguments become $1...$n */
- shell_name = savestring (args->word->word);
- FREE (dollar_vars[0]);
- dollar_vars[0] = savestring (args->word->word);
- remember_args (args->next, 1);
- push_args (args->next); /* BASH_ARGV and BASH_ARGC */
- }
- else /* bind to $1...$n for shell script */
- {
- remember_args (args, 1);
- push_args (args); /* BASH_ARGV and BASH_ARGC */
- }
-
- dispose_words (args);
- }
-
- return (i);
-}
-
-void
-unbind_args ()
-{
- remember_args ((WORD_LIST *)NULL, 1);
- pop_args (); /* Reset BASH_ARGV and BASH_ARGC */
-}
-
-static void
-start_debugger ()
-{
-#if defined (DEBUGGER) && defined (DEBUGGER_START_FILE)
- int old_errexit;
-
- old_errexit = exit_immediately_on_error;
- exit_immediately_on_error = 0;
-
- maybe_execute_file (DEBUGGER_START_FILE, 1);
- function_trace_mode = 1;
-
- exit_immediately_on_error += old_errexit;
-#endif
-}
-
-static int
-open_shell_script (script_name)
- char *script_name;
-{
- int fd, e, fd_is_tty;
- char *filename, *path_filename, *t;
- char sample[80];
- int sample_len;
- struct stat sb;
-#if defined (ARRAY_VARS)
- SHELL_VAR *funcname_v, *bash_source_v, *bash_lineno_v;
- ARRAY *funcname_a, *bash_source_a, *bash_lineno_a;
-#endif
-
- filename = savestring (script_name);
-
- fd = open (filename, O_RDONLY);
- if ((fd < 0) && (errno == ENOENT) && (absolute_program (filename) == 0))
- {
- e = errno;
- /* If it's not in the current directory, try looking through PATH
- for it. */
- path_filename = find_path_file (script_name);
- if (path_filename)
- {
- free (filename);
- filename = path_filename;
- fd = open (filename, O_RDONLY);
- }
- else
- errno = e;
- }
-
- if (fd < 0)
- {
- e = errno;
- file_error (filename);
- exit ((e == ENOENT) ? EX_NOTFOUND : EX_NOINPUT);
- }
-
- free (dollar_vars[0]);
- dollar_vars[0] = exec_argv0 ? savestring (exec_argv0) : savestring (script_name);
- if (exec_argv0)
- {
- free (exec_argv0);
- exec_argv0 = (char *)NULL;
- }
-
-#if defined (ARRAY_VARS)
- GET_ARRAY_FROM_VAR ("FUNCNAME", funcname_v, funcname_a);
- GET_ARRAY_FROM_VAR ("BASH_SOURCE", bash_source_v, bash_source_a);
- GET_ARRAY_FROM_VAR ("BASH_LINENO", bash_lineno_v, bash_lineno_a);
-
- array_push (bash_source_a, filename);
- if (bash_lineno_a)
- {
- t = itos (executing_line_number ());
- array_push (bash_lineno_a, t);
- free (t);
- }
- array_push (funcname_a, "main");
-#endif
-
-#ifdef HAVE_DEV_FD
- fd_is_tty = isatty (fd);
-#else
- fd_is_tty = 0;
-#endif
-
- /* Only do this with non-tty file descriptors we can seek on. */
- if (fd_is_tty == 0 && (lseek (fd, 0L, 1) != -1))
- {
- /* Check to see if the `file' in `bash file' is a binary file
- according to the same tests done by execute_simple_command (),
- and report an error and exit if it is. */
- sample_len = read (fd, sample, sizeof (sample));
- if (sample_len < 0)
- {
- e = errno;
- if ((fstat (fd, &sb) == 0) && S_ISDIR (sb.st_mode))
- internal_error (_("%s: is a directory"), filename);
- else
- {
- errno = e;
- file_error (filename);
- }
- exit (EX_NOEXEC);
- }
- else if (sample_len > 0 && (check_binary_file (sample, sample_len)))
- {
- internal_error (_("%s: cannot execute binary file"), filename);
- exit (EX_BINARY_FILE);
- }
- /* Now rewind the file back to the beginning. */
- lseek (fd, 0L, 0);
- }
-
- /* Open the script. But try to move the file descriptor to a randomly
- large one, in the hopes that any descriptors used by the script will
- not match with ours. */
- fd = move_to_high_fd (fd, 1, -1);
-
-#if defined (BUFFERED_INPUT)
- default_buffered_input = fd;
- SET_CLOSE_ON_EXEC (default_buffered_input);
-#else /* !BUFFERED_INPUT */
- default_input = fdopen (fd, "r");
-
- if (default_input == 0)
- {
- file_error (filename);
- exit (EX_NOTFOUND);
- }
-
- SET_CLOSE_ON_EXEC (fd);
- if (fileno (default_input) != fd)
- SET_CLOSE_ON_EXEC (fileno (default_input));
-#endif /* !BUFFERED_INPUT */
-
- /* Just about the only way for this code to be executed is if something
- like `bash -i /dev/stdin' is executed. */
- if (interactive_shell && fd_is_tty)
- {
- dup2 (fd, 0);
- close (fd);
- fd = 0;
-#if defined (BUFFERED_INPUT)
- default_buffered_input = 0;
-#else
- fclose (default_input);
- default_input = stdin;
-#endif
- }
- else if (forced_interactive && fd_is_tty == 0)
- /* But if a script is called with something like `bash -i scriptname',
- we need to do a non-interactive setup here, since we didn't do it
- before. */
- init_interactive_script ();
-
- free (filename);
- return (fd);
-}
-
-/* Initialize the input routines for the parser. */
-static void
-set_bash_input ()
-{
- /* Make sure the fd from which we are reading input is not in
- no-delay mode. */
-#if defined (BUFFERED_INPUT)
- if (interactive == 0)
- sh_unset_nodelay_mode (default_buffered_input);
- else
-#endif /* !BUFFERED_INPUT */
- sh_unset_nodelay_mode (fileno (stdin));
-
- /* with_input_from_stdin really means `with_input_from_readline' */
- if (interactive && no_line_editing == 0)
- with_input_from_stdin ();
-#if defined (BUFFERED_INPUT)
- else if (interactive == 0)
- with_input_from_buffered_stream (default_buffered_input, dollar_vars[0]);
-#endif /* BUFFERED_INPUT */
- else
- with_input_from_stream (default_input, dollar_vars[0]);
-}
-
-/* Close the current shell script input source and forget about it. This is
- extern so execute_cmd.c:initialize_subshell() can call it. If CHECK_ZERO
- is non-zero, we close default_buffered_input even if it's the standard
- input (fd 0). */
-void
-unset_bash_input (check_zero)
- int check_zero;
-{
-#if defined (BUFFERED_INPUT)
- if ((check_zero && default_buffered_input >= 0) ||
- (check_zero == 0 && default_buffered_input > 0))
- {
- close_buffered_fd (default_buffered_input);
- default_buffered_input = bash_input.location.buffered_fd = -1;
- bash_input.type = st_none; /* XXX */
- }
-#else /* !BUFFERED_INPUT */
- if (default_input)
- {
- fclose (default_input);
- default_input = (FILE *)NULL;
- }
-#endif /* !BUFFERED_INPUT */
-}
-
-
-#if !defined (PROGRAM)
-# define PROGRAM "bash"
-#endif
-
-static void
-set_shell_name (argv0)
- char *argv0;
-{
- /* Here's a hack. If the name of this shell is "sh", then don't do
- any startup files; just try to be more like /bin/sh. */
- shell_name = argv0 ? base_pathname (argv0) : PROGRAM;
-
- if (argv0 && *argv0 == '-')
- {
- if (*shell_name == '-')
- shell_name++;
- login_shell++;
- }
-
- if (shell_name[0] == 's' && shell_name[1] == 'h' && shell_name[2] == '\0')
- act_like_sh++;
- if (shell_name[0] == 's' && shell_name[1] == 'u' && shell_name[2] == '\0')
- su_shell++;
-
- shell_name = argv0 ? argv0 : PROGRAM;
- FREE (dollar_vars[0]);
- dollar_vars[0] = savestring (shell_name);
-
- /* A program may start an interactive shell with
- "execl ("/bin/bash", "-", NULL)".
- If so, default the name of this shell to our name. */
- if (!shell_name || !*shell_name || (shell_name[0] == '-' && !shell_name[1]))
- shell_name = PROGRAM;
-}
-
-static void
-init_interactive ()
-{
- expand_aliases = interactive_shell = startup_state = 1;
- interactive = 1;
-}
-
-static void
-init_noninteractive ()
-{
-#if defined (HISTORY)
- bash_history_reinit (0);
-#endif /* HISTORY */
- interactive_shell = startup_state = interactive = 0;
- expand_aliases = posixly_correct; /* XXX - was 0 not posixly_correct */
- no_line_editing = 1;
-#if defined (JOB_CONTROL)
- set_job_control (0);
-#endif /* JOB_CONTROL */
-}
-
-static void
-init_interactive_script ()
-{
- init_noninteractive ();
- expand_aliases = interactive_shell = startup_state = 1;
-}
-
-void
-get_current_user_info ()
-{
- struct passwd *entry;
-
- /* Don't fetch this more than once. */
- if (current_user.user_name == 0)
- {
- entry = getpwuid (current_user.uid);
- if (entry)
- {
- current_user.user_name = savestring (entry->pw_name);
- current_user.shell = (entry->pw_shell && entry->pw_shell[0])
- ? savestring (entry->pw_shell)
- : savestring ("/bin/sh");
- current_user.home_dir = savestring (entry->pw_dir);
- }
- else
- {
- current_user.user_name = _("I have no name!");
- current_user.user_name = savestring (current_user.user_name);
- current_user.shell = savestring ("/bin/sh");
- current_user.home_dir = savestring ("/");
- }
- endpwent ();
- }
-}
-
-/* Do whatever is necessary to initialize the shell.
- Put new initializations in here. */
-static void
-shell_initialize ()
-{
- char hostname[256];
-
- /* Line buffer output for stderr and stdout. */
- if (shell_initialized == 0)
- {
- sh_setlinebuf (stderr);
- sh_setlinebuf (stdout);
- }
-
- /* Sort the array of shell builtins so that the binary search in
- find_shell_builtin () works correctly. */
- initialize_shell_builtins ();
-
- /* Initialize the trap signal handlers before installing our own
- signal handlers. traps.c:restore_original_signals () is responsible
- for restoring the original default signal handlers. That function
- is called when we make a new child. */
- initialize_traps ();
- initialize_signals (0);
-
- /* It's highly unlikely that this will change. */
- if (current_host_name == 0)
- {
- /* Initialize current_host_name. */
- if (gethostname (hostname, 255) < 0)
- current_host_name = "??host??";
- else
- current_host_name = savestring (hostname);
- }
-
- /* Initialize the stuff in current_user that comes from the password
- file. We don't need to do this right away if the shell is not
- interactive. */
- if (interactive_shell)
- get_current_user_info ();
-
- /* Initialize our interface to the tilde expander. */
- tilde_initialize ();
-
- /* Initialize internal and environment variables. Don't import shell
- functions from the environment if we are running in privileged or
- restricted mode or if the shell is running setuid. */
-#if defined (RESTRICTED_SHELL)
- initialize_shell_variables (shell_environment, privileged_mode||restricted||running_setuid);
-#else
- initialize_shell_variables (shell_environment, privileged_mode||running_setuid);
-#endif
-
- /* Initialize the data structures for storing and running jobs. */
- initialize_job_control (0);
-
- /* Initialize input streams to null. */
- initialize_bash_input ();
-
- initialize_flags ();
-
- /* Initialize the shell options. Don't import the shell options
- from the environment variables $SHELLOPTS or $BASHOPTS if we are
- running in privileged or restricted mode or if the shell is running
- setuid. */
-#if defined (RESTRICTED_SHELL)
- initialize_shell_options (privileged_mode||restricted||running_setuid);
- initialize_bashopts (privileged_mode||restricted||running_setuid);
-#else
- initialize_shell_options (privileged_mode||running_setuid);
- initialize_bashopts (privileged_mode||running_setuid);
-#endif
-}
-
-/* Function called by main () when it appears that the shell has already
- had some initialization performed. This is supposed to reset the world
- back to a pristine state, as if we had been exec'ed. */
-static void
-shell_reinitialize ()
-{
- /* The default shell prompts. */
- primary_prompt = PPROMPT;
- secondary_prompt = SPROMPT;
-
- /* Things that get 1. */
- current_command_number = 1;
-
- /* We have decided that the ~/.bashrc file should not be executed
- for the invocation of each shell script. If the variable $ENV
- (or $BASH_ENV) is set, its value is used as the name of a file
- to source. */
- no_rc = no_profile = 1;
-
- /* Things that get 0. */
- login_shell = make_login_shell = interactive = executing = 0;
- debugging = do_version = line_number = last_command_exit_value = 0;
- forced_interactive = interactive_shell = subshell_environment = 0;
- expand_aliases = 0;
-
-#if defined (HISTORY)
- bash_history_reinit (0);
-#endif /* HISTORY */
-
-#if defined (RESTRICTED_SHELL)
- restricted = 0;
-#endif /* RESTRICTED_SHELL */
-
- /* Ensure that the default startup file is used. (Except that we don't
- execute this file for reinitialized shells). */
- bashrc_file = "~/.bashrc";
-
- /* Delete all variables and functions. They will be reinitialized when
- the environment is parsed. */
- delete_all_contexts (shell_variables);
- delete_all_variables (shell_functions);
-
- reinit_special_variables ();
-
-#if defined (READLINE)
- bashline_reinitialize ();
-#endif
-
- shell_reinitialized = 1;
-}
-
-static void
-show_shell_usage (fp, extra)
- FILE *fp;
- int extra;
-{
- int i;
- char *set_opts, *s, *t;
-
- if (extra)
- fprintf (fp, _("GNU bash, version %s-(%s)\n"), shell_version_string (), MACHTYPE);
- fprintf (fp, _("Usage:\t%s [GNU long option] [option] ...\n\t%s [GNU long option] [option] script-file ...\n"),
- shell_name, shell_name);
- fputs (_("GNU long options:\n"), fp);
- for (i = 0; long_args[i].name; i++)
- fprintf (fp, "\t--%s\n", long_args[i].name);
-
- fputs (_("Shell options:\n"), fp);
- fputs (_("\t-irsD or -c command or -O shopt_option\t\t(invocation only)\n"), fp);
-
- for (i = 0, set_opts = 0; shell_builtins[i].name; i++)
- if (STREQ (shell_builtins[i].name, "set"))
- set_opts = savestring (shell_builtins[i].short_doc);
- if (set_opts)
- {
- s = strchr (set_opts, '[');
- if (s == 0)
- s = set_opts;
- while (*++s == '-')
- ;
- t = strchr (s, ']');
- if (t)
- *t = '\0';
- fprintf (fp, _("\t-%s or -o option\n"), s);
- free (set_opts);
- }
-
- if (extra)
- {
- fprintf (fp, _("Type `%s -c \"help set\"' for more information about shell options.\n"), shell_name);
- fprintf (fp, _("Type `%s -c help' for more information about shell builtin commands.\n"), shell_name);
- fprintf (fp, _("Use the `bashbug' command to report bugs.\n"));
- }
-}
-
-static void
-add_shopt_to_alist (opt, on_or_off)
- char *opt;
- int on_or_off;
-{
- if (shopt_ind >= shopt_len)
- {
- shopt_len += 8;
- shopt_alist = (STRING_INT_ALIST *)xrealloc (shopt_alist, shopt_len * sizeof (shopt_alist[0]));
- }
- shopt_alist[shopt_ind].word = opt;
- shopt_alist[shopt_ind].token = on_or_off;
- shopt_ind++;
-}
-
-static void
-run_shopt_alist ()
-{
- register int i;
-
- for (i = 0; i < shopt_ind; i++)
- if (shopt_setopt (shopt_alist[i].word, (shopt_alist[i].token == '-')) != EXECUTION_SUCCESS)
- exit (EX_BADUSAGE);
- free (shopt_alist);
- shopt_alist = 0;
- shopt_ind = shopt_len = 0;
-}
+++ /dev/null
-*** ../bash-4.2-patched/shell.h 2011-01-06 22:16:55.000000000 -0500
---- shell.h 2011-06-24 19:12:25.000000000 -0400
-***************
-*** 137,140 ****
---- 139,145 ----
- int *token_state;
-
-+ char *token;
-+ int token_buffer_size;
-+
- /* input line state -- line number saved elsewhere */
- int input_line_terminator;
-***************
-*** 167,171 ****
---- 172,186 ----
- } sh_parser_state_t;
-
-+ typedef struct _sh_input_line_state_t {
-+ char *input_line;
-+ int input_line_index;
-+ int input_line_size;
-+ int input_line_len;
-+ } sh_input_line_state_t;
-+
- /* Let's try declaring these here. */
- extern sh_parser_state_t *save_parser_state __P((sh_parser_state_t *));
- extern void restore_parser_state __P((sh_parser_state_t *));
-+
-+ extern sh_input_line_state_t *save_input_line_state __P((sh_input_line_state_t *));
-+ extern void restore_input_line_state __P((sh_input_line_state_t *));
+++ /dev/null
-*** ../bash-4.2-patched/shell.h 2011-01-06 22:16:55.000000000 -0500
---- shell.h 2011-06-24 19:12:25.000000000 -0400
-***************
-*** 97,100 ****
---- 97,102 ----
- extern int shell_compatibility_level;
-
-+ extern int locale_mb_cur_max;
-+
- /* Structure to pass around that holds a bitmap of file descriptors
- to close, and the size of that structure. Used in execute_cmd.c. */
-***************
-*** 137,140 ****
---- 139,145 ----
- int *token_state;
-
-+ char *token;
-+ int token_buffer_size;
-+
- /* input line state -- line number saved elsewhere */
- int input_line_terminator;
-***************
-*** 167,171 ****
---- 172,186 ----
- } sh_parser_state_t;
-
-+ typedef struct _sh_input_line_state_t {
-+ char *input_line;
-+ int input_line_index;
-+ int input_line_size;
-+ int input_line_len;
-+ } sh_input_line_state_t;
-+
- /* Let's try declaring these here. */
- extern sh_parser_state_t *save_parser_state __P((sh_parser_state_t *));
- extern void restore_parser_state __P((sh_parser_state_t *));
-+
-+ extern sh_input_line_state_t *save_input_line_state __P((sh_input_line_state_t *));
-+ extern void restore_input_line_state __P((sh_input_line_state_t *));
+++ /dev/null
-/* shell.h -- The data structures used by the shell */
-
-/* Copyright (C) 1993-2009 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "bashjmp.h"
-
-#include "command.h"
-#include "syntax.h"
-#include "general.h"
-#include "error.h"
-#include "variables.h"
-#include "arrayfunc.h"
-#include "quit.h"
-#include "maxpath.h"
-#include "unwind_prot.h"
-#include "dispose_cmd.h"
-#include "make_cmd.h"
-#include "ocache.h"
-#include "subst.h"
-#include "sig.h"
-#include "pathnames.h"
-#include "externs.h"
-
-extern int EOF_Reached;
-
-#define NO_PIPE -1
-#define REDIRECT_BOTH -2
-
-#define NO_VARIABLE -1
-
-/* Values that can be returned by execute_command (). */
-#define EXECUTION_FAILURE 1
-#define EXECUTION_SUCCESS 0
-
-/* Usage messages by builtins result in a return status of 2. */
-#define EX_BADUSAGE 2
-
-#define EX_MISCERROR 2
-
-/* Special exit statuses used by the shell, internally and externally. */
-#define EX_RETRYFAIL 124
-#define EX_WEXPCOMSUB 125
-#define EX_BINARY_FILE 126
-#define EX_NOEXEC 126
-#define EX_NOINPUT 126
-#define EX_NOTFOUND 127
-
-#define EX_SHERRBASE 256 /* all special error values are > this. */
-
-#define EX_BADSYNTAX 257 /* shell syntax error */
-#define EX_USAGE 258 /* syntax error in usage */
-#define EX_REDIRFAIL 259 /* redirection failed */
-#define EX_BADASSIGN 260 /* variable assignment error */
-#define EX_EXPFAIL 261 /* word expansion failed */
-
-/* Flag values that control parameter pattern substitution. */
-#define MATCH_ANY 0x000
-#define MATCH_BEG 0x001
-#define MATCH_END 0x002
-
-#define MATCH_TYPEMASK 0x003
-
-#define MATCH_GLOBREP 0x010
-#define MATCH_QUOTED 0x020
-#define MATCH_STARSUB 0x040
-
-/* Some needed external declarations. */
-extern char **shell_environment;
-extern WORD_LIST *rest_of_args;
-
-/* Generalized global variables. */
-extern int debugging_mode;
-extern int executing, login_shell;
-extern int interactive, interactive_shell;
-extern int startup_state;
-extern int subshell_environment;
-extern int shell_compatibility_level;
-
-extern int locale_mb_cur_max;
-
-/* Structure to pass around that holds a bitmap of file descriptors
- to close, and the size of that structure. Used in execute_cmd.c. */
-struct fd_bitmap {
- int size;
- char *bitmap;
-};
-
-#define FD_BITMAP_SIZE 32
-
-#define CTLESC '\001'
-#define CTLNUL '\177'
-
-/* Information about the current user. */
-struct user_info {
- uid_t uid, euid;
- gid_t gid, egid;
- char *user_name;
- char *shell; /* shell from the password file */
- char *home_dir;
-};
-
-extern struct user_info current_user;
-
-/* Force gcc to not clobber X on a longjmp(). Old versions of gcc mangle
- this badly. */
-#if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ > 8)
-# define USE_VAR(x) ((void) &(x))
-#else
-# define USE_VAR(x)
-#endif
-
-/* Structure in which to save partial parsing state when doing things like
- PROMPT_COMMAND and bash_execute_unix_command execution. */
-
-typedef struct _sh_parser_state_t {
-
- /* parsing state */
- int parser_state;
- int *token_state;
-
- char *token;
- int token_buffer_size;
-
- /* input line state -- line number saved elsewhere */
- char *input_line;
- int input_line_index;
- int input_line_size;
- int input_line_len;
-
- int input_line_terminator;
- int eof_encountered;
-
-#if defined (HANDLE_MULTIBYTE)
- /* Nothing right now for multibyte state, but might want something later. */
-#endif
-
- char **prompt_string_pointer;
-
- /* history state affecting or modified by the parser */
- int current_command_line_count;
-#if defined (HISTORY)
- int remember_on_history;
- int history_expansion_inhibited;
-#endif
-
- /* execution state possibly modified by the parser */
- int last_command_exit_value;
-#if defined (ARRAY_VARS)
- ARRAY *pipestatus;
-#endif
- sh_builtin_func_t *last_shell_builtin, *this_shell_builtin;
-
- /* flags state affecting the parser */
- int expand_aliases;
- int echo_input_at_read;
-
-} sh_parser_state_t;
-
-/* Let's try declaring these here. */
-extern sh_parser_state_t *save_parser_state __P((sh_parser_state_t *));
-extern void restore_parser_state __P((sh_parser_state_t *));
+++ /dev/null
-/* sig.c - interface for shell signal handlers and signal initialization. */
-
-/* Copyright (C) 1994-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#include "bashtypes.h"
-
-#if defined (HAVE_UNISTD_H)
-# ifdef _MINIX
-# include <sys/types.h>
-# endif
-# include <unistd.h>
-#endif
-
-#include <stdio.h>
-#include <signal.h>
-
-#include "bashintl.h"
-
-#include "shell.h"
-#if defined (JOB_CONTROL)
-#include "jobs.h"
-#endif /* JOB_CONTROL */
-#include "siglist.h"
-#include "sig.h"
-#include "trap.h"
-
-#include "builtins/common.h"
-
-#if defined (READLINE)
-# include "bashline.h"
-# include <readline/readline.h>
-#endif
-
-#if defined (HISTORY)
-# include "bashhist.h"
-#endif
-
-extern int last_command_exit_value;
-extern int last_command_exit_signal;
-extern int return_catch_flag;
-extern int loop_level, continuing, breaking, funcnest;
-extern int executing_list;
-extern int comsub_ignore_return;
-extern int parse_and_execute_level, shell_initialized;
-#if defined (HISTORY)
-extern int history_lines_this_session;
-#endif
-extern int no_line_editing;
-
-extern void initialize_siglist ();
-
-/* Non-zero after SIGINT. */
-volatile int interrupt_state = 0;
-
-/* Non-zero after SIGWINCH */
-volatile int sigwinch_received = 0;
-
-/* Set to the value of any terminating signal received. */
-volatile int terminating_signal = 0;
-
-/* The environment at the top-level R-E loop. We use this in
- the case of error return. */
-procenv_t top_level;
-
-#if defined (JOB_CONTROL) || defined (HAVE_POSIX_SIGNALS)
-/* The signal masks that this shell runs with. */
-sigset_t top_level_mask;
-#endif /* JOB_CONTROL */
-
-/* When non-zero, we throw_to_top_level (). */
-int interrupt_immediately = 0;
-
-/* When non-zero, we call the terminating signal handler immediately. */
-int terminate_immediately = 0;
-
-#if defined (SIGWINCH)
-static SigHandler *old_winch = (SigHandler *)SIG_DFL;
-#endif
-
-static void initialize_shell_signals __P((void));
-
-void
-initialize_signals (reinit)
- int reinit;
-{
- initialize_shell_signals ();
- initialize_job_signals ();
-#if !defined (HAVE_SYS_SIGLIST) && !defined (HAVE_UNDER_SYS_SIGLIST) && !defined (HAVE_STRSIGNAL)
- if (reinit == 0)
- initialize_siglist ();
-#endif /* !HAVE_SYS_SIGLIST && !HAVE_UNDER_SYS_SIGLIST && !HAVE_STRSIGNAL */
-}
-
-/* A structure describing a signal that terminates the shell if not
- caught. The orig_handler member is present so children can reset
- these signals back to their original handlers. */
-struct termsig {
- int signum;
- SigHandler *orig_handler;
- int orig_flags;
-};
-
-#define NULL_HANDLER (SigHandler *)SIG_DFL
-
-/* The list of signals that would terminate the shell if not caught.
- We catch them, but just so that we can write the history file,
- and so forth. */
-static struct termsig terminating_signals[] = {
-#ifdef SIGHUP
-{ SIGHUP, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGINT
-{ SIGINT, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGILL
-{ SIGILL, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGTRAP
-{ SIGTRAP, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGIOT
-{ SIGIOT, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGDANGER
-{ SIGDANGER, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGEMT
-{ SIGEMT, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGFPE
-{ SIGFPE, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGBUS
-{ SIGBUS, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGSEGV
-{ SIGSEGV, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGSYS
-{ SIGSYS, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGPIPE
-{ SIGPIPE, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGALRM
-{ SIGALRM, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGTERM
-{ SIGTERM, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGXCPU
-{ SIGXCPU, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGXFSZ
-{ SIGXFSZ, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGVTALRM
-{ SIGVTALRM, NULL_HANDLER, 0 },
-#endif
-
-#if 0
-#ifdef SIGPROF
-{ SIGPROF, NULL_HANDLER, 0 },
-#endif
-#endif
-
-#ifdef SIGLOST
-{ SIGLOST, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGUSR1
-{ SIGUSR1, NULL_HANDLER, 0 },
-#endif
-
-#ifdef SIGUSR2
-{ SIGUSR2, NULL_HANDLER, 0 },
-#endif
-};
-
-#define TERMSIGS_LENGTH (sizeof (terminating_signals) / sizeof (struct termsig))
-
-#define XSIG(x) (terminating_signals[x].signum)
-#define XHANDLER(x) (terminating_signals[x].orig_handler)
-#define XSAFLAGS(x) (terminating_signals[x].orig_flags)
-
-static int termsigs_initialized = 0;
-
-/* Initialize signals that will terminate the shell to do some
- unwind protection. For non-interactive shells, we only call
- this when a trap is defined for EXIT (0) or when trap is run
- to display signal dispositions. */
-void
-initialize_terminating_signals ()
-{
- register int i;
-#if defined (HAVE_POSIX_SIGNALS)
- struct sigaction act, oact;
-#endif
-
- if (termsigs_initialized)
- return;
-
- /* The following code is to avoid an expensive call to
- set_signal_handler () for each terminating_signals. Fortunately,
- this is possible in Posix. Unfortunately, we have to call signal ()
- on non-Posix systems for each signal in terminating_signals. */
-#if defined (HAVE_POSIX_SIGNALS)
- act.sa_handler = termsig_sighandler;
- act.sa_flags = 0;
- sigemptyset (&act.sa_mask);
- sigemptyset (&oact.sa_mask);
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- sigaddset (&act.sa_mask, XSIG (i));
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- {
- /* If we've already trapped it, don't do anything. */
- if (signal_is_trapped (XSIG (i)))
- continue;
-
- sigaction (XSIG (i), &act, &oact);
- XHANDLER(i) = oact.sa_handler;
- XSAFLAGS(i) = oact.sa_flags;
- /* Don't do anything with signals that are ignored at shell entry
- if the shell is not interactive. */
- /* XXX - should we do this for interactive shells, too? */
- if (interactive_shell == 0 && XHANDLER (i) == SIG_IGN)
- {
- sigaction (XSIG (i), &oact, &act);
- set_signal_ignored (XSIG (i));
- }
-#if defined (SIGPROF) && !defined (_MINIX)
- if (XSIG (i) == SIGPROF && XHANDLER (i) != SIG_DFL && XHANDLER (i) != SIG_IGN)
- sigaction (XSIG (i), &oact, (struct sigaction *)NULL);
-#endif /* SIGPROF && !_MINIX */
- }
-
-#else /* !HAVE_POSIX_SIGNALS */
-
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- {
- /* If we've already trapped it, don't do anything. */
- if (signal_is_trapped (XSIG (i)))
- continue;
-
- XHANDLER(i) = signal (XSIG (i), termsig_sighandler);
- XSAFLAGS(i) = 0;
- /* Don't do anything with signals that are ignored at shell entry
- if the shell is not interactive. */
- /* XXX - should we do this for interactive shells, too? */
- if (interactive_shell == 0 && XHANDLER (i) == SIG_IGN)
- {
- signal (XSIG (i), SIG_IGN);
- set_signal_ignored (XSIG (i));
- }
-#ifdef SIGPROF
- if (XSIG (i) == SIGPROF && XHANDLER (i) != SIG_DFL && XHANDLER (i) != SIG_IGN)
- signal (XSIG (i), XHANDLER (i));
-#endif
- }
-
-#endif /* !HAVE_POSIX_SIGNALS */
-
- termsigs_initialized = 1;
-}
-
-static void
-initialize_shell_signals ()
-{
- if (interactive)
- initialize_terminating_signals ();
-
-#if defined (JOB_CONTROL) || defined (HAVE_POSIX_SIGNALS)
- /* All shells use the signal mask they inherit, and pass it along
- to child processes. Children will never block SIGCHLD, though. */
- sigemptyset (&top_level_mask);
- sigprocmask (SIG_BLOCK, (sigset_t *)NULL, &top_level_mask);
-# if defined (SIGCHLD)
- sigdelset (&top_level_mask, SIGCHLD);
-# endif
-#endif /* JOB_CONTROL || HAVE_POSIX_SIGNALS */
-
- /* And, some signals that are specifically ignored by the shell. */
- set_signal_handler (SIGQUIT, SIG_IGN);
-
- if (interactive)
- {
- set_signal_handler (SIGINT, sigint_sighandler);
- set_signal_handler (SIGTERM, SIG_IGN);
- set_sigwinch_handler ();
- }
-}
-
-void
-reset_terminating_signals ()
-{
- register int i;
-#if defined (HAVE_POSIX_SIGNALS)
- struct sigaction act;
-#endif
-
- if (termsigs_initialized == 0)
- return;
-
-#if defined (HAVE_POSIX_SIGNALS)
- act.sa_flags = 0;
- sigemptyset (&act.sa_mask);
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- {
- /* Skip a signal if it's trapped or handled specially, because the
- trap code will restore the correct value. */
- if (signal_is_trapped (XSIG (i)) || signal_is_special (XSIG (i)))
- continue;
-
- act.sa_handler = XHANDLER (i);
- act.sa_flags = XSAFLAGS (i);
- sigaction (XSIG (i), &act, (struct sigaction *) NULL);
- }
-#else /* !HAVE_POSIX_SIGNALS */
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- {
- if (signal_is_trapped (XSIG (i)) || signal_is_special (XSIG (i)))
- continue;
-
- signal (XSIG (i), XHANDLER (i));
- }
-#endif /* !HAVE_POSIX_SIGNALS */
-}
-#undef XSIG
-#undef XHANDLER
-
-/* Run some of the cleanups that should be performed when we run
- jump_to_top_level from a builtin command context. XXX - might want to
- also call reset_parser here. */
-void
-top_level_cleanup ()
-{
- /* Clean up string parser environment. */
- while (parse_and_execute_level)
- parse_and_execute_cleanup ();
-
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
-
- run_unwind_protects ();
- loop_level = continuing = breaking = funcnest = 0;
- executing_list = comsub_ignore_return = return_catch_flag = 0;
-}
-
-/* What to do when we've been interrupted, and it is safe to handle it. */
-void
-throw_to_top_level ()
-{
- int print_newline = 0;
-
- if (interrupt_state)
- {
- print_newline = 1;
- DELINTERRUPT;
- }
-
- if (interrupt_state)
- return;
-
- last_command_exit_signal = (last_command_exit_value > 128) ?
- (last_command_exit_value - 128) : 0;
- last_command_exit_value |= 128;
-
- /* Run any traps set on SIGINT. */
- run_interrupt_trap ();
-
- /* Clean up string parser environment. */
- while (parse_and_execute_level)
- parse_and_execute_cleanup ();
-
-#if defined (JOB_CONTROL)
- give_terminal_to (shell_pgrp, 0);
-#endif /* JOB_CONTROL */
-
-#if defined (JOB_CONTROL) || defined (HAVE_POSIX_SIGNALS)
- /* This should not be necessary on systems using sigsetjmp/siglongjmp. */
- sigprocmask (SIG_SETMASK, &top_level_mask, (sigset_t *)NULL);
-#endif
-
- reset_parser ();
-
-#if defined (READLINE)
- if (interactive)
- bashline_reset ();
-#endif /* READLINE */
-
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
-
- run_unwind_protects ();
- loop_level = continuing = breaking = funcnest = 0;
- executing_list = comsub_ignore_return = return_catch_flag = 0;
-
- if (interactive && print_newline)
- {
- fflush (stdout);
- fprintf (stderr, "\n");
- fflush (stderr);
- }
-
- /* An interrupted `wait' command in a script does not exit the script. */
- if (interactive || (interactive_shell && !shell_initialized) ||
- (print_newline && signal_is_trapped (SIGINT)))
- jump_to_top_level (DISCARD);
- else
- jump_to_top_level (EXITPROG);
-}
-
-/* This is just here to isolate the longjmp calls. */
-void
-jump_to_top_level (value)
- int value;
-{
- longjmp (top_level, value);
-}
-
-sighandler
-termsig_sighandler (sig)
- int sig;
-{
- /* If we get called twice with the same signal before handling it,
- terminate right away. */
- if (
-#ifdef SIGHUP
- sig != SIGHUP &&
-#endif
-#ifdef SIGINT
- sig != SIGINT &&
-#endif
-#ifdef SIGDANGER
- sig != SIGDANGER &&
-#endif
-#ifdef SIGPIPE
- sig != SIGPIPE &&
-#endif
-#ifdef SIGALRM
- sig != SIGALRM &&
-#endif
-#ifdef SIGTERM
- sig != SIGTERM &&
-#endif
-#ifdef SIGXCPU
- sig != SIGXCPU &&
-#endif
-#ifdef SIGXFSZ
- sig != SIGXFSZ &&
-#endif
-#ifdef SIGVTALRM
- sig != SIGVTALRM &&
-#endif
-#ifdef SIGLOST
- sig != SIGLOST &&
-#endif
-#ifdef SIGUSR1
- sig != SIGUSR1 &&
-#endif
-#ifdef SIGUSR2
- sig != SIGUSR2 &&
-#endif
- sig == terminating_signal)
- terminate_immediately = 1;
-
- terminating_signal = sig;
-
- /* XXX - should this also trigger when interrupt_immediately is set? */
- if (terminate_immediately)
- {
-#if defined (HISTORY)
- /* XXX - will inhibit history file being written */
-# if defined (READLINE)
- if (interactive_shell == 0 || interactive == 0 || (sig != SIGHUP && sig != SIGTERM) || no_line_editing || (RL_ISSTATE (RL_STATE_READCMD) == 0))
-# endif
- history_lines_this_session = 0;
-#endif
- terminate_immediately = 0;
- termsig_handler (sig);
- }
-
- SIGRETURN (0);
-}
-
-void
-termsig_handler (sig)
- int sig;
-{
- static int handling_termsig = 0;
-
- /* Simple semaphore to keep this function from being executed multiple
- times. Since we no longer are running as a signal handler, we don't
- block multiple occurrences of the terminating signals while running. */
- if (handling_termsig)
- return;
- handling_termsig = 1;
- terminating_signal = 0; /* keep macro from re-testing true. */
-
- /* I don't believe this condition ever tests true. */
- if (sig == SIGINT && signal_is_trapped (SIGINT))
- run_interrupt_trap ();
-
-#if defined (HISTORY)
- if (interactive_shell && sig != SIGABRT)
- maybe_save_shell_history ();
-#endif /* HISTORY */
-
-#if defined (JOB_CONTROL)
- if (sig == SIGHUP && (interactive || (subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB))))
- hangup_all_jobs ();
- end_job_control ();
-#endif /* JOB_CONTROL */
-
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
-
- /* Reset execution context */
- loop_level = continuing = breaking = funcnest = 0;
- executing_list = comsub_ignore_return = return_catch_flag = 0;
-
- run_exit_trap ();
- set_signal_handler (sig, SIG_DFL);
- kill (getpid (), sig);
-}
-
-/* What we really do when SIGINT occurs. */
-sighandler
-sigint_sighandler (sig)
- int sig;
-{
-#if defined (MUST_REINSTALL_SIGHANDLERS)
- signal (sig, sigint_sighandler);
-#endif
-
- /* interrupt_state needs to be set for the stack of interrupts to work
- right. Should it be set unconditionally? */
- if (interrupt_state == 0)
- ADDINTERRUPT;
-
- if (interrupt_immediately)
- {
- interrupt_immediately = 0;
- last_command_exit_value = 128 + sig;
- throw_to_top_level ();
- }
-
- SIGRETURN (0);
-}
-
-#if defined (SIGWINCH)
-sighandler
-sigwinch_sighandler (sig)
- int sig;
-{
-#if defined (MUST_REINSTALL_SIGHANDLERS)
- set_signal_handler (SIGWINCH, sigwinch_sighandler);
-#endif /* MUST_REINSTALL_SIGHANDLERS */
- sigwinch_received = 1;
- SIGRETURN (0);
-}
-#endif /* SIGWINCH */
-
-void
-set_sigwinch_handler ()
-{
-#if defined (SIGWINCH)
- old_winch = set_signal_handler (SIGWINCH, sigwinch_sighandler);
-#endif
-}
-
-void
-unset_sigwinch_handler ()
-{
-#if defined (SIGWINCH)
- set_signal_handler (SIGWINCH, old_winch);
-#endif
-}
-
-/* Signal functions used by the rest of the code. */
-#if !defined (HAVE_POSIX_SIGNALS)
-
-#if defined (JOB_CONTROL)
-/* Perform OPERATION on NEWSET, perhaps leaving information in OLDSET. */
-sigprocmask (operation, newset, oldset)
- int operation, *newset, *oldset;
-{
- int old, new;
-
- if (newset)
- new = *newset;
- else
- new = 0;
-
- switch (operation)
- {
- case SIG_BLOCK:
- old = sigblock (new);
- break;
-
- case SIG_SETMASK:
- old = sigsetmask (new);
- break;
-
- default:
- internal_error (_("sigprocmask: %d: invalid operation"), operation);
- }
-
- if (oldset)
- *oldset = old;
-}
-#endif /* JOB_CONTROL */
-
-#else
-
-#if !defined (SA_INTERRUPT)
-# define SA_INTERRUPT 0
-#endif
-
-#if !defined (SA_RESTART)
-# define SA_RESTART 0
-#endif
-
-SigHandler *
-set_signal_handler (sig, handler)
- int sig;
- SigHandler *handler;
-{
- struct sigaction act, oact;
-
- act.sa_handler = handler;
- act.sa_flags = 0;
-
- /* XXX - bash-4.2 */
- /* We don't want a child death to interrupt interruptible system calls, even
- if we take the time to reap children */
- if (sig == SIGCHLD)
- act.sa_flags |= SA_RESTART; /* XXX */
-
- sigemptyset (&act.sa_mask);
- sigemptyset (&oact.sa_mask);
- sigaction (sig, &act, &oact);
- return (oact.sa_handler);
-}
-#endif /* HAVE_POSIX_SIGNALS */
+++ /dev/null
-/* subst.c -- The part of the shell that does parameter, command, arithmetic,
- and globbing substitutions. */
-
-/* ``Have a little faith, there's magic in the night. You ain't a
- beauty, but, hey, you're alright.'' */
-
-/* Copyright (C) 1987-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#include "bashtypes.h"
-#include <stdio.h>
-#include "chartypes.h"
-#if defined (HAVE_PWD_H)
-# include <pwd.h>
-#endif
-#include <signal.h>
-#include <errno.h>
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include "bashansi.h"
-#include "posixstat.h"
-#include "bashintl.h"
-
-#include "shell.h"
-#include "parser.h"
-#include "flags.h"
-#include "jobs.h"
-#include "execute_cmd.h"
-#include "filecntl.h"
-#include "trap.h"
-#include "pathexp.h"
-#include "mailcheck.h"
-
-#include "shmbutil.h"
-#include "typemax.h"
-
-#include "builtins/getopt.h"
-#include "builtins/common.h"
-
-#include "builtins/builtext.h"
-
-#include <tilde/tilde.h>
-#include <glob/strmatch.h>
-
-#if !defined (errno)
-extern int errno;
-#endif /* !errno */
-
-/* The size that strings change by. */
-#define DEFAULT_INITIAL_ARRAY_SIZE 112
-#define DEFAULT_ARRAY_SIZE 128
-
-/* Variable types. */
-#define VT_VARIABLE 0
-#define VT_POSPARMS 1
-#define VT_ARRAYVAR 2
-#define VT_ARRAYMEMBER 3
-#define VT_ASSOCVAR 4
-
-#define VT_STARSUB 128 /* $* or ${array[*]} -- used to split */
-
-/* Flags for quoted_strchr */
-#define ST_BACKSL 0x01
-#define ST_CTLESC 0x02
-#define ST_SQUOTE 0x04 /* unused yet */
-#define ST_DQUOTE 0x08 /* unused yet */
-
-/* Flags for the `pflags' argument to param_expand() */
-#define PF_NOCOMSUB 0x01 /* Do not perform command substitution */
-#define PF_IGNUNBOUND 0x02 /* ignore unbound vars even if -u set */
-#define PF_NOSPLIT2 0x04 /* same as W_NOSPLIT2 */
-
-/* These defs make it easier to use the editor. */
-#define LBRACE '{'
-#define RBRACE '}'
-#define LPAREN '('
-#define RPAREN ')'
-
-#if defined (HANDLE_MULTIBYTE)
-#define WLPAREN L'('
-#define WRPAREN L')'
-#endif
-
-/* Evaluates to 1 if C is one of the shell's special parameters whose length
- can be taken, but is also one of the special expansion characters. */
-#define VALID_SPECIAL_LENGTH_PARAM(c) \
- ((c) == '-' || (c) == '?' || (c) == '#')
-
-/* Evaluates to 1 if C is one of the shell's special parameters for which an
- indirect variable reference may be made. */
-#define VALID_INDIR_PARAM(c) \
- ((posixly_correct == 0 && (c) == '#') || (posixly_correct == 0 && (c) == '?') || (c) == '@' || (c) == '*')
-
-/* Evaluates to 1 if C is one of the OP characters that follows the parameter
- in ${parameter[:]OPword}. */
-#define VALID_PARAM_EXPAND_CHAR(c) (sh_syntaxtab[(unsigned char)c] & CSUBSTOP)
-
-/* Evaluates to 1 if this is one of the shell's special variables. */
-#define SPECIAL_VAR(name, wi) \
- ((DIGIT (*name) && all_digits (name)) || \
- (name[1] == '\0' && (sh_syntaxtab[(unsigned char)*name] & CSPECVAR)) || \
- (wi && name[2] == '\0' && VALID_INDIR_PARAM (name[1])))
-
-/* An expansion function that takes a string and a quoted flag and returns
- a WORD_LIST *. Used as the type of the third argument to
- expand_string_if_necessary(). */
-typedef WORD_LIST *EXPFUNC __P((char *, int));
-
-/* Process ID of the last command executed within command substitution. */
-pid_t last_command_subst_pid = NO_PID;
-pid_t current_command_subst_pid = NO_PID;
-
-/* Variables used to keep track of the characters in IFS. */
-SHELL_VAR *ifs_var;
-char *ifs_value;
-unsigned char ifs_cmap[UCHAR_MAX + 1];
-
-#if defined (HANDLE_MULTIBYTE)
-unsigned char ifs_firstc[MB_LEN_MAX];
-size_t ifs_firstc_len;
-#else
-unsigned char ifs_firstc;
-#endif
-
-/* Sentinel to tell when we are performing variable assignments preceding a
- command name and putting them into the environment. Used to make sure
- we use the temporary environment when looking up variable values. */
-int assigning_in_environment;
-
-/* Used to hold a list of variable assignments preceding a command. Global
- so the SIGCHLD handler in jobs.c can unwind-protect it when it runs a
- SIGCHLD trap and so it can be saved and restored by the trap handlers. */
-WORD_LIST *subst_assign_varlist = (WORD_LIST *)NULL;
-
-/* Extern functions and variables from different files. */
-extern int last_command_exit_value, last_command_exit_signal;
-extern int subshell_environment, line_number;
-extern int subshell_level, parse_and_execute_level, sourcelevel;
-extern int eof_encountered;
-extern int return_catch_flag, return_catch_value;
-extern pid_t dollar_dollar_pid;
-extern int posixly_correct;
-extern char *this_command_name;
-extern struct fd_bitmap *current_fds_to_close;
-extern int wordexp_only;
-extern int expanding_redir;
-extern int tempenv_assign_error;
-
-#if !defined (HAVE_WCSDUP) && defined (HANDLE_MULTIBYTE)
-extern wchar_t *wcsdup __P((const wchar_t *));
-#endif
-
-/* Non-zero means to allow unmatched globbed filenames to expand to
- a null file. */
-int allow_null_glob_expansion;
-
-/* Non-zero means to throw an error when globbing fails to match anything. */
-int fail_glob_expansion;
-
-#if 0
-/* Variables to keep track of which words in an expanded word list (the
- output of expand_word_list_internal) are the result of globbing
- expansions. GLOB_ARGV_FLAGS is used by execute_cmd.c.
- (CURRENTLY UNUSED). */
-char *glob_argv_flags;
-static int glob_argv_flags_size;
-#endif
-
-static WORD_LIST expand_word_error, expand_word_fatal;
-static WORD_DESC expand_wdesc_error, expand_wdesc_fatal;
-static char expand_param_error, expand_param_fatal;
-static char extract_string_error, extract_string_fatal;
-
-/* Tell the expansion functions to not longjmp back to top_level on fatal
- errors. Enabled when doing completion and prompt string expansion. */
-static int no_longjmp_on_fatal_error = 0;
-
-/* Set by expand_word_unsplit; used to inhibit splitting and re-joining
- $* on $IFS, primarily when doing assignment statements. */
-static int expand_no_split_dollar_star = 0;
-
-/* A WORD_LIST of words to be expanded by expand_word_list_internal,
- without any leading variable assignments. */
-static WORD_LIST *garglist = (WORD_LIST *)NULL;
-
-static char *quoted_substring __P((char *, int, int));
-static int quoted_strlen __P((char *));
-static char *quoted_strchr __P((char *, int, int));
-
-static char *expand_string_if_necessary __P((char *, int, EXPFUNC *));
-static inline char *expand_string_to_string_internal __P((char *, int, EXPFUNC *));
-static WORD_LIST *call_expand_word_internal __P((WORD_DESC *, int, int, int *, int *));
-static WORD_LIST *expand_string_internal __P((char *, int));
-static WORD_LIST *expand_string_leave_quoted __P((char *, int));
-static WORD_LIST *expand_string_for_rhs __P((char *, int, int *, int *));
-
-static WORD_LIST *list_quote_escapes __P((WORD_LIST *));
-static char *make_quoted_char __P((int));
-static WORD_LIST *quote_list __P((WORD_LIST *));
-
-static int unquoted_substring __P((char *, char *));
-static int unquoted_member __P((int, char *));
-
-#if defined (ARRAY_VARS)
-static SHELL_VAR *do_compound_assignment __P((char *, char *, int));
-#endif
-static int do_assignment_internal __P((const WORD_DESC *, int));
-
-static char *string_extract_verbatim __P((char *, size_t, int *, char *, int));
-static char *string_extract __P((char *, int *, char *, int));
-static char *string_extract_double_quoted __P((char *, int *, int));
-static inline char *string_extract_single_quoted __P((char *, int *));
-static inline int skip_single_quoted __P((const char *, size_t, int));
-static int skip_double_quoted __P((char *, size_t, int));
-static char *extract_delimited_string __P((char *, int *, char *, char *, char *, int));
-static char *extract_dollar_brace_string __P((char *, int *, int, int));
-static int skip_matched_pair __P((const char *, int, int, int, int));
-
-static char *pos_params __P((char *, int, int, int));
-
-static unsigned char *mb_getcharlens __P((char *, int));
-
-static char *remove_upattern __P((char *, char *, int));
-#if defined (HANDLE_MULTIBYTE)
-static wchar_t *remove_wpattern __P((wchar_t *, size_t, wchar_t *, int));
-#endif
-static char *remove_pattern __P((char *, char *, int));
-
-static int match_upattern __P((char *, char *, int, char **, char **));
-#if defined (HANDLE_MULTIBYTE)
-static int match_wpattern __P((wchar_t *, char **, size_t, wchar_t *, int, char **, char **));
-#endif
-static int match_pattern __P((char *, char *, int, char **, char **));
-static int getpatspec __P((int, char *));
-static char *getpattern __P((char *, int, int));
-static char *variable_remove_pattern __P((char *, char *, int, int));
-static char *list_remove_pattern __P((WORD_LIST *, char *, int, int, int));
-static char *parameter_list_remove_pattern __P((int, char *, int, int));
-#ifdef ARRAY_VARS
-static char *array_remove_pattern __P((SHELL_VAR *, char *, int, char *, int));
-#endif
-static char *parameter_brace_remove_pattern __P((char *, char *, int, char *, int, int, int));
-
-static char *process_substitute __P((char *, int));
-
-static char *read_comsub __P((int, int, int *));
-
-#ifdef ARRAY_VARS
-static arrayind_t array_length_reference __P((char *));
-#endif
-
-static int valid_brace_expansion_word __P((char *, int));
-static int chk_atstar __P((char *, int, int *, int *));
-static int chk_arithsub __P((const char *, int));
-
-static WORD_DESC *parameter_brace_expand_word __P((char *, int, int, int, arrayind_t *));
-static WORD_DESC *parameter_brace_expand_indir __P((char *, int, int, int *, int *));
-static WORD_DESC *parameter_brace_expand_rhs __P((char *, char *, int, int, int *, int *));
-static void parameter_brace_expand_error __P((char *, char *));
-
-static int valid_length_expression __P((char *));
-static intmax_t parameter_brace_expand_length __P((char *));
-
-static char *skiparith __P((char *, int));
-static int verify_substring_values __P((SHELL_VAR *, char *, char *, int, intmax_t *, intmax_t *));
-static int get_var_and_type __P((char *, char *, arrayind_t, int, int, SHELL_VAR **, char **));
-static char *mb_substring __P((char *, int, int));
-static char *parameter_brace_substring __P((char *, char *, int, char *, int, int));
-
-static int shouldexp_replacement __P((char *));
-
-static char *pos_params_pat_subst __P((char *, char *, char *, int));
-
-static char *parameter_brace_patsub __P((char *, char *, int, char *, int, int));
-
-static char *pos_params_casemod __P((char *, char *, int, int));
-static char *parameter_brace_casemod __P((char *, char *, int, int, char *, int, int));
-
-static WORD_DESC *parameter_brace_expand __P((char *, int *, int, int, int *, int *));
-static WORD_DESC *param_expand __P((char *, int *, int, int *, int *, int *, int *, int));
-
-static WORD_LIST *expand_word_internal __P((WORD_DESC *, int, int, int *, int *));
-
-static WORD_LIST *word_list_split __P((WORD_LIST *));
-
-static void exp_jump_to_top_level __P((int));
-
-static WORD_LIST *separate_out_assignments __P((WORD_LIST *));
-static WORD_LIST *glob_expand_word_list __P((WORD_LIST *, int));
-#ifdef BRACE_EXPANSION
-static WORD_LIST *brace_expand_word_list __P((WORD_LIST *, int));
-#endif
-#if defined (ARRAY_VARS)
-static int make_internal_declare __P((char *, char *));
-#endif
-static WORD_LIST *shell_expand_word_list __P((WORD_LIST *, int));
-static WORD_LIST *expand_word_list_internal __P((WORD_LIST *, int));
-
-/* **************************************************************** */
-/* */
-/* Utility Functions */
-/* */
-/* **************************************************************** */
-
-#if defined (DEBUG)
-void
-dump_word_flags (flags)
- int flags;
-{
- int f;
-
- f = flags;
- fprintf (stderr, "%d -> ", f);
- if (f & W_ASSIGNASSOC)
- {
- f &= ~W_ASSIGNASSOC;
- fprintf (stderr, "W_ASSIGNASSOC%s", f ? "|" : "");
- }
- if (f & W_HASCTLESC)
- {
- f &= ~W_HASCTLESC;
- fprintf (stderr, "W_HASCTLESC%s", f ? "|" : "");
- }
- if (f & W_NOPROCSUB)
- {
- f &= ~W_NOPROCSUB;
- fprintf (stderr, "W_NOPROCSUB%s", f ? "|" : "");
- }
- if (f & W_DQUOTE)
- {
- f &= ~W_DQUOTE;
- fprintf (stderr, "W_DQUOTE%s", f ? "|" : "");
- }
- if (f & W_HASQUOTEDNULL)
- {
- f &= ~W_HASQUOTEDNULL;
- fprintf (stderr, "W_HASQUOTEDNULL%s", f ? "|" : "");
- }
- if (f & W_ASSIGNARG)
- {
- f &= ~W_ASSIGNARG;
- fprintf (stderr, "W_ASSIGNARG%s", f ? "|" : "");
- }
- if (f & W_ASSNBLTIN)
- {
- f &= ~W_ASSNBLTIN;
- fprintf (stderr, "W_ASSNBLTIN%s", f ? "|" : "");
- }
- if (f & W_COMPASSIGN)
- {
- f &= ~W_COMPASSIGN;
- fprintf (stderr, "W_COMPASSIGN%s", f ? "|" : "");
- }
- if (f & W_NOEXPAND)
- {
- f &= ~W_NOEXPAND;
- fprintf (stderr, "W_NOEXPAND%s", f ? "|" : "");
- }
- if (f & W_ITILDE)
- {
- f &= ~W_ITILDE;
- fprintf (stderr, "W_ITILDE%s", f ? "|" : "");
- }
- if (f & W_NOTILDE)
- {
- f &= ~W_NOTILDE;
- fprintf (stderr, "W_NOTILDE%s", f ? "|" : "");
- }
- if (f & W_ASSIGNRHS)
- {
- f &= ~W_ASSIGNRHS;
- fprintf (stderr, "W_ASSIGNRHS%s", f ? "|" : "");
- }
- if (f & W_NOCOMSUB)
- {
- f &= ~W_NOCOMSUB;
- fprintf (stderr, "W_NOCOMSUB%s", f ? "|" : "");
- }
- if (f & W_DOLLARSTAR)
- {
- f &= ~W_DOLLARSTAR;
- fprintf (stderr, "W_DOLLARSTAR%s", f ? "|" : "");
- }
- if (f & W_DOLLARAT)
- {
- f &= ~W_DOLLARAT;
- fprintf (stderr, "W_DOLLARAT%s", f ? "|" : "");
- }
- if (f & W_TILDEEXP)
- {
- f &= ~W_TILDEEXP;
- fprintf (stderr, "W_TILDEEXP%s", f ? "|" : "");
- }
- if (f & W_NOSPLIT2)
- {
- f &= ~W_NOSPLIT2;
- fprintf (stderr, "W_NOSPLIT2%s", f ? "|" : "");
- }
- if (f & W_NOGLOB)
- {
- f &= ~W_NOGLOB;
- fprintf (stderr, "W_NOGLOB%s", f ? "|" : "");
- }
- if (f & W_NOSPLIT)
- {
- f &= ~W_NOSPLIT;
- fprintf (stderr, "W_NOSPLIT%s", f ? "|" : "");
- }
- if (f & W_GLOBEXP)
- {
- f &= ~W_GLOBEXP;
- fprintf (stderr, "W_GLOBEXP%s", f ? "|" : "");
- }
- if (f & W_ASSIGNMENT)
- {
- f &= ~W_ASSIGNMENT;
- fprintf (stderr, "W_ASSIGNMENT%s", f ? "|" : "");
- }
- if (f & W_QUOTED)
- {
- f &= ~W_QUOTED;
- fprintf (stderr, "W_QUOTED%s", f ? "|" : "");
- }
- if (f & W_HASDOLLAR)
- {
- f &= ~W_HASDOLLAR;
- fprintf (stderr, "W_HASDOLLAR%s", f ? "|" : "");
- }
- fprintf (stderr, "\n");
- fflush (stderr);
-}
-#endif
-
-#ifdef INCLUDE_UNUSED
-static char *
-quoted_substring (string, start, end)
- char *string;
- int start, end;
-{
- register int len, l;
- register char *result, *s, *r;
-
- len = end - start;
-
- /* Move to string[start], skipping quoted characters. */
- for (s = string, l = 0; *s && l < start; )
- {
- if (*s == CTLESC)
- {
- s++;
- continue;
- }
- l++;
- if (*s == 0)
- break;
- }
-
- r = result = (char *)xmalloc (2*len + 1); /* save room for quotes */
-
- /* Copy LEN characters, including quote characters. */
- s = string + l;
- for (l = 0; l < len; s++)
- {
- if (*s == CTLESC)
- *r++ = *s++;
- *r++ = *s;
- l++;
- if (*s == 0)
- break;
- }
- *r = '\0';
- return result;
-}
-#endif
-
-#ifdef INCLUDE_UNUSED
-/* Return the length of S, skipping over quoted characters */
-static int
-quoted_strlen (s)
- char *s;
-{
- register char *p;
- int i;
-
- i = 0;
- for (p = s; *p; p++)
- {
- if (*p == CTLESC)
- {
- p++;
- if (*p == 0)
- return (i + 1);
- }
- i++;
- }
-
- return i;
-}
-#endif
-
-/* Find the first occurrence of character C in string S, obeying shell
- quoting rules. If (FLAGS & ST_BACKSL) is non-zero, backslash-escaped
- characters are skipped. If (FLAGS & ST_CTLESC) is non-zero, characters
- escaped with CTLESC are skipped. */
-static char *
-quoted_strchr (s, c, flags)
- char *s;
- int c, flags;
-{
- register char *p;
-
- for (p = s; *p; p++)
- {
- if (((flags & ST_BACKSL) && *p == '\\')
- || ((flags & ST_CTLESC) && *p == CTLESC))
- {
- p++;
- if (*p == '\0')
- return ((char *)NULL);
- continue;
- }
- else if (*p == c)
- return p;
- }
- return ((char *)NULL);
-}
-
-/* Return 1 if CHARACTER appears in an unquoted portion of
- STRING. Return 0 otherwise. CHARACTER must be a single-byte character. */
-static int
-unquoted_member (character, string)
- int character;
- char *string;
-{
- size_t slen;
- int sindex, c;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- sindex = 0;
- while (c = string[sindex])
- {
- if (c == character)
- return (1);
-
- switch (c)
- {
- default:
- ADVANCE_CHAR (string, slen, sindex);
- break;
-
- case '\\':
- sindex++;
- if (string[sindex])
- ADVANCE_CHAR (string, slen, sindex);
- break;
-
- case '\'':
- sindex = skip_single_quoted (string, slen, ++sindex);
- break;
-
- case '"':
- sindex = skip_double_quoted (string, slen, ++sindex);
- break;
- }
- }
- return (0);
-}
-
-/* Return 1 if SUBSTR appears in an unquoted portion of STRING. */
-static int
-unquoted_substring (substr, string)
- char *substr, *string;
-{
- size_t slen;
- int sindex, c, sublen;
- DECLARE_MBSTATE;
-
- if (substr == 0 || *substr == '\0')
- return (0);
-
- slen = strlen (string);
- sublen = strlen (substr);
- for (sindex = 0; c = string[sindex]; )
- {
- if (STREQN (string + sindex, substr, sublen))
- return (1);
-
- switch (c)
- {
- case '\\':
- sindex++;
- if (string[sindex])
- ADVANCE_CHAR (string, slen, sindex);
- break;
-
- case '\'':
- sindex = skip_single_quoted (string, slen, ++sindex);
- break;
-
- case '"':
- sindex = skip_double_quoted (string, slen, ++sindex);
- break;
-
- default:
- ADVANCE_CHAR (string, slen, sindex);
- break;
- }
- }
- return (0);
-}
-
-/* Most of the substitutions must be done in parallel. In order
- to avoid using tons of unclear goto's, I have some functions
- for manipulating malloc'ed strings. They all take INDX, a
- pointer to an integer which is the offset into the string
- where manipulation is taking place. They also take SIZE, a
- pointer to an integer which is the current length of the
- character array for this string. */
-
-/* Append SOURCE to TARGET at INDEX. SIZE is the current amount
- of space allocated to TARGET. SOURCE can be NULL, in which
- case nothing happens. Gets rid of SOURCE by freeing it.
- Returns TARGET in case the location has changed. */
-INLINE char *
-sub_append_string (source, target, indx, size)
- char *source, *target;
- int *indx, *size;
-{
- if (source)
- {
- int srclen, n;
-
- srclen = STRLEN (source);
- if (srclen >= (int)(*size - *indx))
- {
- n = srclen + *indx;
- n = (n + DEFAULT_ARRAY_SIZE) - (n % DEFAULT_ARRAY_SIZE);
- target = (char *)xrealloc (target, (*size = n));
- }
-
- FASTCOPY (source, target + *indx, srclen);
- *indx += srclen;
- target[*indx] = '\0';
-
- free (source);
- }
- return (target);
-}
-
-#if 0
-/* UNUSED */
-/* Append the textual representation of NUMBER to TARGET.
- INDX and SIZE are as in SUB_APPEND_STRING. */
-char *
-sub_append_number (number, target, indx, size)
- intmax_t number;
- int *indx, *size;
- char *target;
-{
- char *temp;
-
- temp = itos (number);
- return (sub_append_string (temp, target, indx, size));
-}
-#endif
-
-/* Extract a substring from STRING, starting at SINDEX and ending with
- one of the characters in CHARLIST. Don't make the ending character
- part of the string. Leave SINDEX pointing at the ending character.
- Understand about backslashes in the string. If (flags & SX_VARNAME)
- is non-zero, and array variables have been compiled into the shell,
- everything between a `[' and a corresponding `]' is skipped over.
- If (flags & SX_NOALLOC) is non-zero, don't return the substring, just
- update SINDEX. If (flags & SX_REQMATCH) is non-zero, the string must
- contain a closing character from CHARLIST. */
-static char *
-string_extract (string, sindex, charlist, flags)
- char *string;
- int *sindex;
- char *charlist;
- int flags;
-{
- register int c, i;
- int found;
- size_t slen;
- char *temp;
- DECLARE_MBSTATE;
-
- slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0;
- i = *sindex;
- found = 0;
- while (c = string[i])
- {
- if (c == '\\')
- {
- if (string[i + 1])
- i++;
- else
- break;
- }
-#if defined (ARRAY_VARS)
- else if ((flags & SX_VARNAME) && c == '[')
- {
- int ni;
- /* If this is an array subscript, skip over it and continue. */
- ni = skipsubscript (string, i, 0);
- if (string[ni] == ']')
- i = ni;
- }
-#endif
- else if (MEMBER (c, charlist))
- {
- found = 1;
- break;
- }
-
- ADVANCE_CHAR (string, slen, i);
- }
-
- /* If we had to have a matching delimiter and didn't find one, return an
- error and let the caller deal with it. */
- if ((flags & SX_REQMATCH) && found == 0)
- {
- *sindex = i;
- return (&extract_string_error);
- }
-
- temp = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i);
- *sindex = i;
-
- return (temp);
-}
-
-/* Extract the contents of STRING as if it is enclosed in double quotes.
- SINDEX, when passed in, is the offset of the character immediately
- following the opening double quote; on exit, SINDEX is left pointing after
- the closing double quote. If STRIPDQ is non-zero, unquoted double
- quotes are stripped and the string is terminated by a null byte.
- Backslashes between the embedded double quotes are processed. If STRIPDQ
- is zero, an unquoted `"' terminates the string. */
-static char *
-string_extract_double_quoted (string, sindex, stripdq)
- char *string;
- int *sindex, stripdq;
-{
- size_t slen;
- char *send;
- int j, i, t;
- unsigned char c;
- char *temp, *ret; /* The new string we return. */
- int pass_next, backquote, si; /* State variables for the machine. */
- int dquote;
- DECLARE_MBSTATE;
-
- slen = strlen (string + *sindex) + *sindex;
- send = string + slen;
-
- pass_next = backquote = dquote = 0;
- temp = (char *)xmalloc (1 + slen - *sindex);
-
- j = 0;
- i = *sindex;
- while (c = string[i])
- {
- /* Process a character that was quoted by a backslash. */
- if (pass_next)
- {
- /* XXX - take another look at this in light of Interp 221 */
- /* Posix.2 sez:
-
- ``The backslash shall retain its special meaning as an escape
- character only when followed by one of the characters:
- $ ` " \ <newline>''.
-
- If STRIPDQ is zero, we handle the double quotes here and let
- expand_word_internal handle the rest. If STRIPDQ is non-zero,
- we have already been through one round of backslash stripping,
- and want to strip these backslashes only if DQUOTE is non-zero,
- indicating that we are inside an embedded double-quoted string. */
-
- /* If we are in an embedded quoted string, then don't strip
- backslashes before characters for which the backslash
- retains its special meaning, but remove backslashes in
- front of other characters. If we are not in an
- embedded quoted string, don't strip backslashes at all.
- This mess is necessary because the string was already
- surrounded by double quotes (and sh has some really weird
- quoting rules).
- The returned string will be run through expansion as if
- it were double-quoted. */
- if ((stripdq == 0 && c != '"') ||
- (stripdq && ((dquote && (sh_syntaxtab[c] & CBSDQUOTE)) || dquote == 0)))
- temp[j++] = '\\';
- pass_next = 0;
-
-add_one_character:
- COPY_CHAR_I (temp, j, string, send, i);
- continue;
- }
-
- /* A backslash protects the next character. The code just above
- handles preserving the backslash in front of any character but
- a double quote. */
- if (c == '\\')
- {
- pass_next++;
- i++;
- continue;
- }
-
- /* Inside backquotes, ``the portion of the quoted string from the
- initial backquote and the characters up to the next backquote
- that is not preceded by a backslash, having escape characters
- removed, defines that command''. */
- if (backquote)
- {
- if (c == '`')
- backquote = 0;
- temp[j++] = c;
- i++;
- continue;
- }
-
- if (c == '`')
- {
- temp[j++] = c;
- backquote++;
- i++;
- continue;
- }
-
- /* Pass everything between `$(' and the matching `)' or a quoted
- ${ ... } pair through according to the Posix.2 specification. */
- if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE)))
- {
- int free_ret = 1;
-
- si = i + 2;
- if (string[i + 1] == LPAREN)
- ret = extract_command_subst (string, &si, 0);
- else
- ret = extract_dollar_brace_string (string, &si, Q_DOUBLE_QUOTES, 0);
-
- temp[j++] = '$';
- temp[j++] = string[i + 1];
-
- /* Just paranoia; ret will not be 0 unless no_longjmp_on_fatal_error
- is set. */
- if (ret == 0 && no_longjmp_on_fatal_error)
- {
- free_ret = 0;
- ret = string + i + 2;
- }
-
- for (t = 0; ret[t]; t++, j++)
- temp[j] = ret[t];
- temp[j] = string[si];
-
- if (string[si])
- {
- j++;
- i = si + 1;
- }
- else
- i = si;
-
- if (free_ret)
- free (ret);
- continue;
- }
-
- /* Add any character but a double quote to the quoted string we're
- accumulating. */
- if (c != '"')
- goto add_one_character;
-
- /* c == '"' */
- if (stripdq)
- {
- dquote ^= 1;
- i++;
- continue;
- }
-
- break;
- }
- temp[j] = '\0';
-
- /* Point to after the closing quote. */
- if (c)
- i++;
- *sindex = i;
-
- return (temp);
-}
-
-/* This should really be another option to string_extract_double_quoted. */
-static int
-skip_double_quoted (string, slen, sind)
- char *string;
- size_t slen;
- int sind;
-{
- int c, i;
- char *ret;
- int pass_next, backquote, si;
- DECLARE_MBSTATE;
-
- pass_next = backquote = 0;
- i = sind;
- while (c = string[i])
- {
- if (pass_next)
- {
- pass_next = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '\\')
- {
- pass_next++;
- i++;
- continue;
- }
- else if (backquote)
- {
- if (c == '`')
- backquote = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '`')
- {
- backquote++;
- i++;
- continue;
- }
- else if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE)))
- {
- si = i + 2;
- if (string[i + 1] == LPAREN)
- ret = extract_command_subst (string, &si, SX_NOALLOC);
- else
- ret = extract_dollar_brace_string (string, &si, Q_DOUBLE_QUOTES, SX_NOALLOC);
-
- i = si + 1;
- continue;
- }
- else if (c != '"')
- {
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else
- break;
- }
-
- if (c)
- i++;
-
- return (i);
-}
-
-/* Extract the contents of STRING as if it is enclosed in single quotes.
- SINDEX, when passed in, is the offset of the character immediately
- following the opening single quote; on exit, SINDEX is left pointing after
- the closing single quote. */
-static inline char *
-string_extract_single_quoted (string, sindex)
- char *string;
- int *sindex;
-{
- register int i;
- size_t slen;
- char *t;
- DECLARE_MBSTATE;
-
- /* Don't need slen for ADVANCE_CHAR unless multibyte chars possible. */
- slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0;
- i = *sindex;
- while (string[i] && string[i] != '\'')
- ADVANCE_CHAR (string, slen, i);
-
- t = substring (string, *sindex, i);
-
- if (string[i])
- i++;
- *sindex = i;
-
- return (t);
-}
-
-static inline int
-skip_single_quoted (string, slen, sind)
- const char *string;
- size_t slen;
- int sind;
-{
- register int c;
- DECLARE_MBSTATE;
-
- c = sind;
- while (string[c] && string[c] != '\'')
- ADVANCE_CHAR (string, slen, c);
-
- if (string[c])
- c++;
- return c;
-}
-
-/* Just like string_extract, but doesn't hack backslashes or any of
- that other stuff. Obeys CTLESC quoting. Used to do splitting on $IFS. */
-static char *
-string_extract_verbatim (string, slen, sindex, charlist, flags)
- char *string;
- size_t slen;
- int *sindex;
- char *charlist;
- int flags;
-{
- register int i;
-#if defined (HANDLE_MULTIBYTE)
- size_t clen;
- wchar_t *wcharlist;
-#endif
- int c;
- char *temp;
- DECLARE_MBSTATE;
-
- if (charlist[0] == '\'' && charlist[1] == '\0')
- {
- temp = string_extract_single_quoted (string, sindex);
- --*sindex; /* leave *sindex at separator character */
- return temp;
- }
-
- i = *sindex;
-#if 0
- /* See how the MBLEN and ADVANCE_CHAR macros work to understand why we need
- this only if MB_CUR_MAX > 1. */
- slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 1;
-#endif
-#if defined (HANDLE_MULTIBYTE)
- clen = strlen (charlist);
- wcharlist = 0;
-#endif
- while (c = string[i])
- {
-#if defined (HANDLE_MULTIBYTE)
- size_t mblength;
-#endif
- if ((flags & SX_NOCTLESC) == 0 && c == CTLESC)
- {
- i += 2;
- continue;
- }
- /* Even if flags contains SX_NOCTLESC, we let CTLESC quoting CTLNUL
- through, to protect the CTLNULs from later calls to
- remove_quoted_nulls. */
- else if ((flags & SX_NOESCCTLNUL) == 0 && c == CTLESC && string[i+1] == CTLNUL)
- {
- i += 2;
- continue;
- }
-
-#if defined (HANDLE_MULTIBYTE)
- mblength = MBLEN (string + i, slen - i);
- if (mblength > 1)
- {
- wchar_t wc;
- mblength = mbtowc (&wc, string + i, slen - i);
- if (MB_INVALIDCH (mblength))
- {
- if (MEMBER (c, charlist))
- break;
- }
- else
- {
- if (wcharlist == 0)
- {
- size_t len;
- len = mbstowcs (wcharlist, charlist, 0);
- if (len == -1)
- len = 0;
- wcharlist = (wchar_t *)xmalloc (sizeof (wchar_t) * (len + 1));
- mbstowcs (wcharlist, charlist, len + 1);
- }
-
- if (wcschr (wcharlist, wc))
- break;
- }
- }
- else
-#endif
- if (MEMBER (c, charlist))
- break;
-
- ADVANCE_CHAR (string, slen, i);
- }
-
-#if defined (HANDLE_MULTIBYTE)
- FREE (wcharlist);
-#endif
-
- temp = substring (string, *sindex, i);
- *sindex = i;
-
- return (temp);
-}
-
-/* Extract the $( construct in STRING, and return a new string.
- Start extracting at (SINDEX) as if we had just seen "$(".
- Make (SINDEX) get the position of the matching ")". )
- XFLAGS is additional flags to pass to other extraction functions. */
-char *
-extract_command_subst (string, sindex, xflags)
- char *string;
- int *sindex;
- int xflags;
-{
- if (string[*sindex] == LPAREN)
- return (extract_delimited_string (string, sindex, "$(", "(", ")", xflags|SX_COMMAND)); /*)*/
- else
- {
- xflags |= (no_longjmp_on_fatal_error ? SX_NOLONGJMP : 0);
- return (xparse_dolparen (string, string+*sindex, sindex, xflags));
- }
-}
-
-/* Extract the $[ construct in STRING, and return a new string. (])
- Start extracting at (SINDEX) as if we had just seen "$[".
- Make (SINDEX) get the position of the matching "]". */
-char *
-extract_arithmetic_subst (string, sindex)
- char *string;
- int *sindex;
-{
- return (extract_delimited_string (string, sindex, "$[", "[", "]", 0)); /*]*/
-}
-
-#if defined (PROCESS_SUBSTITUTION)
-/* Extract the <( or >( construct in STRING, and return a new string.
- Start extracting at (SINDEX) as if we had just seen "<(".
- Make (SINDEX) get the position of the matching ")". */ /*))*/
-char *
-extract_process_subst (string, starter, sindex)
- char *string;
- char *starter;
- int *sindex;
-{
- return (extract_delimited_string (string, sindex, starter, "(", ")", 0));
-}
-#endif /* PROCESS_SUBSTITUTION */
-
-#if defined (ARRAY_VARS)
-/* This can be fooled by unquoted right parens in the passed string. If
- each caller verifies that the last character in STRING is a right paren,
- we don't even need to call extract_delimited_string. */
-char *
-extract_array_assignment_list (string, sindex)
- char *string;
- int *sindex;
-{
- int slen;
- char *ret;
-
- slen = strlen (string); /* ( */
- if (string[slen - 1] == ')')
- {
- ret = substring (string, *sindex, slen - 1);
- *sindex = slen - 1;
- return ret;
- }
- return 0;
-}
-#endif
-
-/* Extract and create a new string from the contents of STRING, a
- character string delimited with OPENER and CLOSER. SINDEX is
- the address of an int describing the current offset in STRING;
- it should point to just after the first OPENER found. On exit,
- SINDEX gets the position of the last character of the matching CLOSER.
- If OPENER is more than a single character, ALT_OPENER, if non-null,
- contains a character string that can also match CLOSER and thus
- needs to be skipped. */
-static char *
-extract_delimited_string (string, sindex, opener, alt_opener, closer, flags)
- char *string;
- int *sindex;
- char *opener, *alt_opener, *closer;
- int flags;
-{
- int i, c, si;
- size_t slen;
- char *t, *result;
- int pass_character, nesting_level, in_comment;
- int len_closer, len_opener, len_alt_opener;
- DECLARE_MBSTATE;
-
- slen = strlen (string + *sindex) + *sindex;
- len_opener = STRLEN (opener);
- len_alt_opener = STRLEN (alt_opener);
- len_closer = STRLEN (closer);
-
- pass_character = in_comment = 0;
-
- nesting_level = 1;
- i = *sindex;
-
- while (nesting_level)
- {
- c = string[i];
-
- if (c == 0)
- break;
-
- if (in_comment)
- {
- if (c == '\n')
- in_comment = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
-
- if (pass_character) /* previous char was backslash */
- {
- pass_character = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
-
- /* Not exactly right yet; should handle shell metacharacters and
- multibyte characters, too. See COMMENT_BEGIN define in parse.y */
- if ((flags & SX_COMMAND) && c == '#' && (i == 0 || string[i - 1] == '\n' || shellblank (string[i - 1])))
- {
- in_comment = 1;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
-
- if (c == CTLESC || c == '\\')
- {
- pass_character++;
- i++;
- continue;
- }
-
- /* Process a nested command substitution, but only if we're parsing an
- arithmetic substitution. */
- if ((flags & SX_COMMAND) && string[i] == '$' && string[i+1] == LPAREN)
- {
- si = i + 2;
- t = extract_command_subst (string, &si, flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Process a nested OPENER. */
- if (STREQN (string + i, opener, len_opener))
- {
- si = i + len_opener;
- t = extract_delimited_string (string, &si, opener, alt_opener, closer, flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Process a nested ALT_OPENER */
- if (len_alt_opener && STREQN (string + i, alt_opener, len_alt_opener))
- {
- si = i + len_alt_opener;
- t = extract_delimited_string (string, &si, alt_opener, alt_opener, closer, flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* If the current substring terminates the delimited string, decrement
- the nesting level. */
- if (STREQN (string + i, closer, len_closer))
- {
- i += len_closer - 1; /* move to last byte of the closer */
- nesting_level--;
- if (nesting_level == 0)
- break;
- }
-
- /* Pass old-style command substitution through verbatim. */
- if (c == '`')
- {
- si = i + 1;
- t = string_extract (string, &si, "`", flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Pass single-quoted and double-quoted strings through verbatim. */
- if (c == '\'' || c == '"')
- {
- si = i + 1;
- i = (c == '\'') ? skip_single_quoted (string, slen, si)
- : skip_double_quoted (string, slen, si);
- continue;
- }
-
- /* move past this character, which was not special. */
- ADVANCE_CHAR (string, slen, i);
- }
-
- if (c == 0 && nesting_level)
- {
- if (no_longjmp_on_fatal_error == 0)
- {
- report_error (_("bad substitution: no closing `%s' in %s"), closer, string);
- last_command_exit_value = EXECUTION_FAILURE;
- exp_jump_to_top_level (DISCARD);
- }
- else
- {
- *sindex = i;
- return (char *)NULL;
- }
- }
-
- si = i - *sindex - len_closer + 1;
- if (flags & SX_NOALLOC)
- result = (char *)NULL;
- else
- {
- result = (char *)xmalloc (1 + si);
- strncpy (result, string + *sindex, si);
- result[si] = '\0';
- }
- *sindex = i;
-
- return (result);
-}
-
-/* Extract a parameter expansion expression within ${ and } from STRING.
- Obey the Posix.2 rules for finding the ending `}': count braces while
- skipping over enclosed quoted strings and command substitutions.
- SINDEX is the address of an int describing the current offset in STRING;
- it should point to just after the first `{' found. On exit, SINDEX
- gets the position of the matching `}'. QUOTED is non-zero if this
- occurs inside double quotes. */
-/* XXX -- this is very similar to extract_delimited_string -- XXX */
-static char *
-extract_dollar_brace_string (string, sindex, quoted, flags)
- char *string;
- int *sindex, quoted, flags;
-{
- register int i, c;
- size_t slen;
- int pass_character, nesting_level, si, dolbrace_state;
- char *result, *t;
- DECLARE_MBSTATE;
-
- pass_character = 0;
- nesting_level = 1;
- slen = strlen (string + *sindex) + *sindex;
-
- /* The handling of dolbrace_state needs to agree with the code in parse.y:
- parse_matched_pair(). The different initial value is to handle the
- case where this function is called to parse the word in
- ${param op word} (SX_WORD). */
- dolbrace_state = (flags & SX_WORD) ? DOLBRACE_WORD : DOLBRACE_PARAM;
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && (flags & SX_POSIXEXP))
- dolbrace_state = DOLBRACE_QUOTE;
-
- i = *sindex;
- while (c = string[i])
- {
- if (pass_character)
- {
- pass_character = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
-
- /* CTLESCs and backslashes quote the next character. */
- if (c == CTLESC || c == '\\')
- {
- pass_character++;
- i++;
- continue;
- }
-
- if (string[i] == '$' && string[i+1] == LBRACE)
- {
- nesting_level++;
- i += 2;
- continue;
- }
-
- if (c == RBRACE)
- {
- nesting_level--;
- if (nesting_level == 0)
- break;
- i++;
- continue;
- }
-
- /* Pass the contents of old-style command substitutions through
- verbatim. */
- if (c == '`')
- {
- si = i + 1;
- t = string_extract (string, &si, "`", flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Pass the contents of new-style command substitutions and
- arithmetic substitutions through verbatim. */
- if (string[i] == '$' && string[i+1] == LPAREN)
- {
- si = i + 2;
- t = extract_command_subst (string, &si, flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
-#if 0
- /* Pass the contents of single-quoted and double-quoted strings
- through verbatim. */
- if (c == '\'' || c == '"')
- {
- si = i + 1;
- i = (c == '\'') ? skip_single_quoted (string, slen, si)
- : skip_double_quoted (string, slen, si);
- /* skip_XXX_quoted leaves index one past close quote */
- continue;
- }
-#else /* XXX - bash-4.2 */
- /* Pass the contents of double-quoted strings through verbatim. */
- if (c == '"')
- {
- si = i + 1;
- i = skip_double_quoted (string, slen, si);
- /* skip_XXX_quoted leaves index one past close quote */
- continue;
- }
-
- if (c == '\'')
- {
-/*itrace("extract_dollar_brace_string: c == single quote flags = %d quoted = %d dolbrace_state = %d", flags, quoted, dolbrace_state);*/
- if (posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ADVANCE_CHAR (string, slen, i);
- else
- {
- si = i + 1;
- i = skip_single_quoted (string, slen, si);
- }
-
- continue;
- }
-#endif
-
- /* move past this character, which was not special. */
- ADVANCE_CHAR (string, slen, i);
-
- /* This logic must agree with parse.y:parse_matched_pair, since they
- share the same defines. */
- if (dolbrace_state == DOLBRACE_PARAM && c == '%' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && c == '#' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && c == '/' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && c == '^' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && c == ',' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && strchr ("#%^,~:-=?+/", c) != 0)
- dolbrace_state = DOLBRACE_OP;
- else if (dolbrace_state == DOLBRACE_OP && strchr ("#%^,~:-=?+/", c) == 0)
- dolbrace_state = DOLBRACE_WORD;
- }
-
- if (c == 0 && nesting_level)
- {
- if (no_longjmp_on_fatal_error == 0)
- { /* { */
- report_error (_("bad substitution: no closing `%s' in %s"), "}", string);
- last_command_exit_value = EXECUTION_FAILURE;
- exp_jump_to_top_level (DISCARD);
- }
- else
- {
- *sindex = i;
- return ((char *)NULL);
- }
- }
-
- result = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i);
- *sindex = i;
-
- return (result);
-}
-
-/* Remove backslashes which are quoting backquotes from STRING. Modifies
- STRING, and returns a pointer to it. */
-char *
-de_backslash (string)
- char *string;
-{
- register size_t slen;
- register int i, j, prev_i;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- i = j = 0;
-
- /* Loop copying string[i] to string[j], i >= j. */
- while (i < slen)
- {
- if (string[i] == '\\' && (string[i + 1] == '`' || string[i + 1] == '\\' ||
- string[i + 1] == '$'))
- i++;
- prev_i = i;
- ADVANCE_CHAR (string, slen, i);
- if (j < prev_i)
- do string[j++] = string[prev_i++]; while (prev_i < i);
- else
- j = i;
- }
- string[j] = '\0';
-
- return (string);
-}
-
-#if 0
-/*UNUSED*/
-/* Replace instances of \! in a string with !. */
-void
-unquote_bang (string)
- char *string;
-{
- register int i, j;
- register char *temp;
-
- temp = (char *)xmalloc (1 + strlen (string));
-
- for (i = 0, j = 0; (temp[j] = string[i]); i++, j++)
- {
- if (string[i] == '\\' && string[i + 1] == '!')
- {
- temp[j] = '!';
- i++;
- }
- }
- strcpy (string, temp);
- free (temp);
-}
-#endif
-
-#define CQ_RETURN(x) do { no_longjmp_on_fatal_error = 0; return (x); } while (0)
-
-/* This function assumes s[i] == open; returns with s[ret] == close; used to
- parse array subscripts. FLAGS & 1 means to not attempt to skip over
- matched pairs of quotes or backquotes, or skip word expansions; it is
- intended to be used after expansion has been performed and during final
- assignment parsing (see arrayfunc.c:assign_compound_array_list()). */
-static int
-skip_matched_pair (string, start, open, close, flags)
- const char *string;
- int start, open, close, flags;
-{
- int i, pass_next, backq, si, c, count;
- size_t slen;
- char *temp, *ss;
- DECLARE_MBSTATE;
-
- slen = strlen (string + start) + start;
- no_longjmp_on_fatal_error = 1;
-
- i = start + 1; /* skip over leading bracket */
- count = 1;
- pass_next = backq = 0;
- ss = (char *)string;
- while (c = string[i])
- {
- if (pass_next)
- {
- pass_next = 0;
- if (c == 0)
- CQ_RETURN(i);
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '\\')
- {
- pass_next = 1;
- i++;
- continue;
- }
- else if (backq)
- {
- if (c == '`')
- backq = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if ((flags & 1) == 0 && c == '`')
- {
- backq = 1;
- i++;
- continue;
- }
- else if ((flags & 1) == 0 && c == open)
- {
- count++;
- i++;
- continue;
- }
- else if (c == close)
- {
- count--;
- if (count == 0)
- break;
- i++;
- continue;
- }
- else if ((flags & 1) == 0 && (c == '\'' || c == '"'))
- {
- i = (c == '\'') ? skip_single_quoted (ss, slen, ++i)
- : skip_double_quoted (ss, slen, ++i);
- /* no increment, the skip functions increment past the closing quote. */
- }
- else if ((flags&1) == 0 && c == '$' && (string[i+1] == LPAREN || string[i+1] == LBRACE))
- {
- si = i + 2;
- if (string[si] == '\0')
- CQ_RETURN(si);
-
- if (string[i+1] == LPAREN)
- temp = extract_delimited_string (ss, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */
- else
- temp = extract_dollar_brace_string (ss, &si, 0, SX_NOALLOC);
- i = si;
- if (string[i] == '\0') /* don't increment i past EOS in loop */
- break;
- i++;
- continue;
- }
- else
- ADVANCE_CHAR (string, slen, i);
- }
-
- CQ_RETURN(i);
-}
-
-#if defined (ARRAY_VARS)
-int
-skipsubscript (string, start, flags)
- const char *string;
- int start, flags;
-{
- return (skip_matched_pair (string, start, '[', ']', flags));
-}
-#endif
-
-/* Skip characters in STRING until we find a character in DELIMS, and return
- the index of that character. START is the index into string at which we
- begin. This is similar in spirit to strpbrk, but it returns an index into
- STRING and takes a starting index. This little piece of code knows quite
- a lot of shell syntax. It's very similar to skip_double_quoted and other
- functions of that ilk. */
-int
-skip_to_delim (string, start, delims, flags)
- char *string;
- int start;
- char *delims;
- int flags;
-{
- int i, pass_next, backq, si, c, invert, skipquote, skipcmd;
- size_t slen;
- char *temp, open[3];
- DECLARE_MBSTATE;
-
- slen = strlen (string + start) + start;
- if (flags & SD_NOJMP)
- no_longjmp_on_fatal_error = 1;
- invert = (flags & SD_INVERT);
- skipcmd = (flags & SD_NOSKIPCMD) == 0;
-
- i = start;
- pass_next = backq = 0;
- while (c = string[i])
- {
- /* If this is non-zero, we should not let quote characters be delimiters
- and the current character is a single or double quote. We should not
- test whether or not it's a delimiter until after we skip single- or
- double-quoted strings. */
- skipquote = ((flags & SD_NOQUOTEDELIM) && (c == '\'' || c =='"'));
- if (pass_next)
- {
- pass_next = 0;
- if (c == 0)
- CQ_RETURN(i);
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '\\')
- {
- pass_next = 1;
- i++;
- continue;
- }
- else if (backq)
- {
- if (c == '`')
- backq = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '`')
- {
- backq = 1;
- i++;
- continue;
- }
- else if (skipquote == 0 && invert == 0 && member (c, delims))
- break;
- else if (c == '\'' || c == '"')
- {
- i = (c == '\'') ? skip_single_quoted (string, slen, ++i)
- : skip_double_quoted (string, slen, ++i);
- /* no increment, the skip functions increment past the closing quote. */
- }
- else if (c == '$' && ((skipcmd && string[i+1] == LPAREN) || string[i+1] == LBRACE))
- {
- si = i + 2;
- if (string[si] == '\0')
- CQ_RETURN(si);
-
- if (string[i+1] == LPAREN)
- temp = extract_delimited_string (string, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */
- else
- temp = extract_dollar_brace_string (string, &si, 0, SX_NOALLOC);
- i = si;
- if (string[i] == '\0') /* don't increment i past EOS in loop */
- break;
- i++;
- continue;
- }
-#if defined (PROCESS_SUBSTITUTION)
- else if (skipcmd && (c == '<' || c == '>') && string[i+1] == LPAREN)
- {
- si = i + 2;
- if (string[si] == '\0')
- CQ_RETURN(si);
- temp = extract_process_subst (string, (c == '<') ? "<(" : ">(", &si);
- i = si;
- if (string[i] == '\0')
- break;
- i++;
- continue;
- }
-#endif /* PROCESS_SUBSTITUTION */
-#if defined (EXTENDED_GLOB)
- else if ((flags & SD_EXTGLOB) && extended_glob && string[i+1] == LPAREN && member (c, "?*+!@"))
- {
- si = i + 2;
- if (string[si] == '\0')
- CQ_RETURN(si);
-
- open[0] = c;
- open[1] = LPAREN;
- open[2] = '\0';
- temp = extract_delimited_string (string, &si, open, "(", ")", SX_NOALLOC); /* ) */
-
- i = si;
- if (string[i] == '\0') /* don't increment i past EOS in loop */
- break;
- i++;
- continue;
- }
-#endif
- else if ((skipquote || invert) && (member (c, delims) == 0))
- break;
- else
- ADVANCE_CHAR (string, slen, i);
- }
-
- CQ_RETURN(i);
-}
-
-#if defined (READLINE)
-/* Return 1 if the portion of STRING ending at EINDEX is quoted (there is
- an unclosed quoted string), or if the character at EINDEX is quoted
- by a backslash. NO_LONGJMP_ON_FATAL_ERROR is used to flag that the various
- single and double-quoted string parsing functions should not return an
- error if there are unclosed quotes or braces. The characters that this
- recognizes need to be the same as the contents of
- rl_completer_quote_characters. */
-
-int
-char_is_quoted (string, eindex)
- char *string;
- int eindex;
-{
- int i, pass_next, c;
- size_t slen;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- no_longjmp_on_fatal_error = 1;
- i = pass_next = 0;
- while (i <= eindex)
- {
- c = string[i];
-
- if (pass_next)
- {
- pass_next = 0;
- if (i >= eindex) /* XXX was if (i >= eindex - 1) */
- CQ_RETURN(1);
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '\\')
- {
- pass_next = 1;
- i++;
- continue;
- }
- else if (c == '\'' || c == '"')
- {
- i = (c == '\'') ? skip_single_quoted (string, slen, ++i)
- : skip_double_quoted (string, slen, ++i);
- if (i > eindex)
- CQ_RETURN(1);
- /* no increment, the skip_xxx functions go one past end */
- }
- else
- ADVANCE_CHAR (string, slen, i);
- }
-
- CQ_RETURN(0);
-}
-
-int
-unclosed_pair (string, eindex, openstr)
- char *string;
- int eindex;
- char *openstr;
-{
- int i, pass_next, openc, olen;
- size_t slen;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- olen = strlen (openstr);
- i = pass_next = openc = 0;
- while (i <= eindex)
- {
- if (pass_next)
- {
- pass_next = 0;
- if (i >= eindex) /* XXX was if (i >= eindex - 1) */
- return 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (string[i] == '\\')
- {
- pass_next = 1;
- i++;
- continue;
- }
- else if (STREQN (string + i, openstr, olen))
- {
- openc = 1 - openc;
- i += olen;
- }
- else if (string[i] == '\'' || string[i] == '"')
- {
- i = (string[i] == '\'') ? skip_single_quoted (string, slen, i)
- : skip_double_quoted (string, slen, i);
- if (i > eindex)
- return 0;
- }
- else
- ADVANCE_CHAR (string, slen, i);
- }
- return (openc);
-}
-
-/* Split STRING (length SLEN) at DELIMS, and return a WORD_LIST with the
- individual words. If DELIMS is NULL, the current value of $IFS is used
- to split the string, and the function follows the shell field splitting
- rules. SENTINEL is an index to look for. NWP, if non-NULL,
- gets the number of words in the returned list. CWP, if non-NULL, gets
- the index of the word containing SENTINEL. Non-whitespace chars in
- DELIMS delimit separate fields. */
-WORD_LIST *
-split_at_delims (string, slen, delims, sentinel, flags, nwp, cwp)
- char *string;
- int slen;
- char *delims;
- int sentinel, flags;
- int *nwp, *cwp;
-{
- int ts, te, i, nw, cw, ifs_split, dflags;
- char *token, *d, *d2;
- WORD_LIST *ret, *tl;
-
- if (string == 0 || *string == '\0')
- {
- if (nwp)
- *nwp = 0;
- if (cwp)
- *cwp = 0;
- return ((WORD_LIST *)NULL);
- }
-
- d = (delims == 0) ? ifs_value : delims;
- ifs_split = delims == 0;
-
- /* Make d2 the non-whitespace characters in delims */
- d2 = 0;
- if (delims)
- {
- size_t slength;
-#if defined (HANDLE_MULTIBYTE)
- size_t mblength = 1;
-#endif
- DECLARE_MBSTATE;
-
- slength = strlen (delims);
- d2 = (char *)xmalloc (slength + 1);
- i = ts = 0;
- while (delims[i])
- {
-#if defined (HANDLE_MULTIBYTE)
- mbstate_t state_bak;
- state_bak = state;
- mblength = MBRLEN (delims + i, slength, &state);
- if (MB_INVALIDCH (mblength))
- state = state_bak;
- else if (mblength > 1)
- {
- memcpy (d2 + ts, delims + i, mblength);
- ts += mblength;
- i += mblength;
- slength -= mblength;
- continue;
- }
-#endif
- if (whitespace (delims[i]) == 0)
- d2[ts++] = delims[i];
-
- i++;
- slength--;
- }
- d2[ts] = '\0';
- }
-
- ret = (WORD_LIST *)NULL;
-
- /* Remove sequences of whitespace characters at the start of the string, as
- long as those characters are delimiters. */
- for (i = 0; member (string[i], d) && spctabnl (string[i]); i++)
- ;
- if (string[i] == '\0')
- return (ret);
-
- ts = i;
- nw = 0;
- cw = -1;
- dflags = flags|SD_NOJMP;
- while (1)
- {
- te = skip_to_delim (string, ts, d, dflags);
-
- /* If we have a non-whitespace delimiter character, use it to make a
- separate field. This is just about what $IFS splitting does and
- is closer to the behavior of the shell parser. */
- if (ts == te && d2 && member (string[ts], d2))
- {
- te = ts + 1;
- /* If we're using IFS splitting, the non-whitespace delimiter char
- and any additional IFS whitespace delimits a field. */
- if (ifs_split)
- while (member (string[te], d) && spctabnl (string[te]))
- te++;
- else
- while (member (string[te], d2))
- te++;
- }
-
- token = substring (string, ts, te);
-
- ret = add_string_to_list (token, ret);
- free (token);
- nw++;
-
- if (sentinel >= ts && sentinel <= te)
- cw = nw;
-
- /* If the cursor is at whitespace just before word start, set the
- sentinel word to the current word. */
- if (cwp && cw == -1 && sentinel == ts-1)
- cw = nw;
-
- /* If the cursor is at whitespace between two words, make a new, empty
- word, add it before (well, after, since the list is in reverse order)
- the word we just added, and set the current word to that one. */
- if (cwp && cw == -1 && sentinel < ts)
- {
- tl = make_word_list (make_word (""), ret->next);
- ret->next = tl;
- cw = nw;
- nw++;
- }
-
- if (string[te] == 0)
- break;
-
- i = te;
- while (member (string[i], d) && (ifs_split || spctabnl(string[i])))
- i++;
-
- if (string[i])
- ts = i;
- else
- break;
- }
-
- /* Special case for SENTINEL at the end of STRING. If we haven't found
- the word containing SENTINEL yet, and the index we're looking for is at
- the end of STRING (or past the end of the previously-found token,
- possible if the end of the line is composed solely of IFS whitespace)
- add an additional null argument and set the current word pointer to that. */
- if (cwp && cw == -1 && (sentinel >= slen || sentinel >= te))
- {
- if (whitespace (string[sentinel - 1]))
- {
- token = "";
- ret = add_string_to_list (token, ret);
- nw++;
- }
- cw = nw;
- }
-
- if (nwp)
- *nwp = nw;
- if (cwp)
- *cwp = cw;
-
- return (REVERSE_LIST (ret, WORD_LIST *));
-}
-#endif /* READLINE */
-
-#if 0
-/* UNUSED */
-/* Extract the name of the variable to bind to from the assignment string. */
-char *
-assignment_name (string)
- char *string;
-{
- int offset;
- char *temp;
-
- offset = assignment (string, 0);
- if (offset == 0)
- return (char *)NULL;
- temp = substring (string, 0, offset);
- return (temp);
-}
-#endif
-
-/* **************************************************************** */
-/* */
-/* Functions to convert strings to WORD_LISTs and vice versa */
-/* */
-/* **************************************************************** */
-
-/* Return a single string of all the words in LIST. SEP is the separator
- to put between individual elements of LIST in the output string. */
-char *
-string_list_internal (list, sep)
- WORD_LIST *list;
- char *sep;
-{
- register WORD_LIST *t;
- char *result, *r;
- int word_len, sep_len, result_size;
-
- if (list == 0)
- return ((char *)NULL);
-
- /* Short-circuit quickly if we don't need to separate anything. */
- if (list->next == 0)
- return (savestring (list->word->word));
-
- /* This is nearly always called with either sep[0] == 0 or sep[1] == 0. */
- sep_len = STRLEN (sep);
- result_size = 0;
-
- for (t = list; t; t = t->next)
- {
- if (t != list)
- result_size += sep_len;
- result_size += strlen (t->word->word);
- }
-
- r = result = (char *)xmalloc (result_size + 1);
-
- for (t = list; t; t = t->next)
- {
- if (t != list && sep_len)
- {
- if (sep_len > 1)
- {
- FASTCOPY (sep, r, sep_len);
- r += sep_len;
- }
- else
- *r++ = sep[0];
- }
-
- word_len = strlen (t->word->word);
- FASTCOPY (t->word->word, r, word_len);
- r += word_len;
- }
-
- *r = '\0';
- return (result);
-}
-
-/* Return a single string of all the words present in LIST, separating
- each word with a space. */
-char *
-string_list (list)
- WORD_LIST *list;
-{
- return (string_list_internal (list, " "));
-}
-
-/* An external interface that can be used by the rest of the shell to
- obtain a string containing the first character in $IFS. Handles all
- the multibyte complications. If LENP is non-null, it is set to the
- length of the returned string. */
-char *
-ifs_firstchar (lenp)
- int *lenp;
-{
- char *ret;
- int len;
-
- ret = xmalloc (MB_LEN_MAX + 1);
-#if defined (HANDLE_MULTIBYTE)
- if (ifs_firstc_len == 1)
- {
- ret[0] = ifs_firstc[0];
- ret[1] = '\0';
- len = ret[0] ? 1 : 0;
- }
- else
- {
- memcpy (ret, ifs_firstc, ifs_firstc_len);
- ret[len = ifs_firstc_len] = '\0';
- }
-#else
- ret[0] = ifs_firstc;
- ret[1] = '\0';
- len = ret[0] ? 0 : 1;
-#endif
-
- if (lenp)
- *lenp = len;
-
- return ret;
-}
-
-/* Return a single string of all the words present in LIST, obeying the
- quoting rules for "$*", to wit: (P1003.2, draft 11, 3.5.2) "If the
- expansion [of $*] appears within a double quoted string, it expands
- to a single field with the value of each parameter separated by the
- first character of the IFS variable, or by a <space> if IFS is unset." */
-char *
-string_list_dollar_star (list)
- WORD_LIST *list;
-{
- char *ret;
-#if defined (HANDLE_MULTIBYTE)
-# if defined (__GNUC__)
- char sep[MB_CUR_MAX + 1];
-# else
- char *sep = 0;
-# endif
-#else
- char sep[2];
-#endif
-
-#if defined (HANDLE_MULTIBYTE)
-# if !defined (__GNUC__)
- sep = (char *)xmalloc (MB_CUR_MAX + 1);
-# endif /* !__GNUC__ */
- if (ifs_firstc_len == 1)
- {
- sep[0] = ifs_firstc[0];
- sep[1] = '\0';
- }
- else
- {
- memcpy (sep, ifs_firstc, ifs_firstc_len);
- sep[ifs_firstc_len] = '\0';
- }
-#else
- sep[0] = ifs_firstc;
- sep[1] = '\0';
-#endif
-
- ret = string_list_internal (list, sep);
-#if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__)
- free (sep);
-#endif
- return ret;
-}
-
-/* Turn $@ into a string. If (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- is non-zero, the $@ appears within double quotes, and we should quote
- the list before converting it into a string. If IFS is unset, and the
- word is not quoted, we just need to quote CTLESC and CTLNUL characters
- in the words in the list, because the default value of $IFS is
- <space><tab><newline>, IFS characters in the words in the list should
- also be split. If IFS is null, and the word is not quoted, we need
- to quote the words in the list to preserve the positional parameters
- exactly. */
-char *
-string_list_dollar_at (list, quoted)
- WORD_LIST *list;
- int quoted;
-{
- char *ifs, *ret;
-#if defined (HANDLE_MULTIBYTE)
-# if defined (__GNUC__)
- char sep[MB_CUR_MAX + 1];
-# else
- char *sep = 0;
-# endif /* !__GNUC__ */
-#else
- char sep[2];
-#endif
- WORD_LIST *tlist;
-
- /* XXX this could just be ifs = ifs_value; */
- ifs = ifs_var ? value_cell (ifs_var) : (char *)0;
-
-#if defined (HANDLE_MULTIBYTE)
-# if !defined (__GNUC__)
- sep = (char *)xmalloc (MB_CUR_MAX + 1);
-# endif /* !__GNUC__ */
- if (ifs && *ifs)
- {
- if (ifs_firstc_len == 1)
- {
- sep[0] = ifs_firstc[0];
- sep[1] = '\0';
- }
- else
- {
- memcpy (sep, ifs_firstc, ifs_firstc_len);
- sep[ifs_firstc_len] = '\0';
- }
- }
- else
- {
- sep[0] = ' ';
- sep[1] = '\0';
- }
-#else
- sep[0] = (ifs == 0 || *ifs == 0) ? ' ' : *ifs;
- sep[1] = '\0';
-#endif
-
- /* XXX -- why call quote_list if ifs == 0? we can get away without doing
- it now that quote_escapes quotes spaces */
- tlist = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE))
- ? quote_list (list)
- : list_quote_escapes (list);
-
- ret = string_list_internal (tlist, sep);
-#if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__)
- free (sep);
-#endif
- return ret;
-}
-
-/* Turn the positional paramters into a string, understanding quoting and
- the various subtleties of using the first character of $IFS as the
- separator. Calls string_list_dollar_at, string_list_dollar_star, and
- string_list as appropriate. */
-char *
-string_list_pos_params (pchar, list, quoted)
- int pchar;
- WORD_LIST *list;
- int quoted;
-{
- char *ret;
- WORD_LIST *tlist;
-
- if (pchar == '*' && (quoted & Q_DOUBLE_QUOTES))
- {
- tlist = quote_list (list);
- word_list_remove_quoted_nulls (tlist);
- ret = string_list_dollar_star (tlist);
- }
- else if (pchar == '*' && (quoted & Q_HERE_DOCUMENT))
- {
- tlist = quote_list (list);
- word_list_remove_quoted_nulls (tlist);
- ret = string_list (tlist);
- }
- else if (pchar == '*')
- {
- /* Even when unquoted, string_list_dollar_star does the right thing
- making sure that the first character of $IFS is used as the
- separator. */
- ret = string_list_dollar_star (list);
- }
- else if (pchar == '@' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- /* We use string_list_dollar_at, but only if the string is quoted, since
- that quotes the escapes if it's not, which we don't want. We could
- use string_list (the old code did), but that doesn't do the right
- thing if the first character of $IFS is not a space. We use
- string_list_dollar_star if the string is unquoted so we make sure that
- the elements of $@ are separated by the first character of $IFS for
- later splitting. */
- ret = string_list_dollar_at (list, quoted);
- else if (pchar == '@')
- ret = string_list_dollar_star (list);
- else
- ret = string_list ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? quote_list (list) : list);
-
- return ret;
-}
-
-/* Return the list of words present in STRING. Separate the string into
- words at any of the characters found in SEPARATORS. If QUOTED is
- non-zero then word in the list will have its quoted flag set, otherwise
- the quoted flag is left as make_word () deemed fit.
-
- This obeys the P1003.2 word splitting semantics. If `separators' is
- exactly <space><tab><newline>, then the splitting algorithm is that of
- the Bourne shell, which treats any sequence of characters from `separators'
- as a delimiter. If IFS is unset, which results in `separators' being set
- to "", no splitting occurs. If separators has some other value, the
- following rules are applied (`IFS white space' means zero or more
- occurrences of <space>, <tab>, or <newline>, as long as those characters
- are in `separators'):
-
- 1) IFS white space is ignored at the start and the end of the
- string.
- 2) Each occurrence of a character in `separators' that is not
- IFS white space, along with any adjacent occurrences of
- IFS white space delimits a field.
- 3) Any nonzero-length sequence of IFS white space delimits a field.
- */
-
-/* BEWARE! list_string strips null arguments. Don't call it twice and
- expect to have "" preserved! */
-
-/* This performs word splitting and quoted null character removal on
- STRING. */
-#define issep(c) \
- (((separators)[0]) ? ((separators)[1] ? isifs(c) \
- : (c) == (separators)[0]) \
- : 0)
-
-WORD_LIST *
-list_string (string, separators, quoted)
- register char *string, *separators;
- int quoted;
-{
- WORD_LIST *result;
- WORD_DESC *t;
- char *current_word, *s;
- int sindex, sh_style_split, whitesep, xflags;
- size_t slen;
-
- if (!string || !*string)
- return ((WORD_LIST *)NULL);
-
- sh_style_split = separators && separators[0] == ' ' &&
- separators[1] == '\t' &&
- separators[2] == '\n' &&
- separators[3] == '\0';
- for (xflags = 0, s = ifs_value; s && *s; s++)
- {
- if (*s == CTLESC) xflags |= SX_NOCTLESC;
- else if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL;
- }
-
- slen = 0;
- /* Remove sequences of whitespace at the beginning of STRING, as
- long as those characters appear in IFS. Do not do this if
- STRING is quoted or if there are no separator characters. */
- if (!quoted || !separators || !*separators)
- {
- for (s = string; *s && spctabnl (*s) && issep (*s); s++);
-
- if (!*s)
- return ((WORD_LIST *)NULL);
-
- string = s;
- }
-
- /* OK, now STRING points to a word that does not begin with white space.
- The splitting algorithm is:
- extract a word, stopping at a separator
- skip sequences of spc, tab, or nl as long as they are separators
- This obeys the field splitting rules in Posix.2. */
- slen = (MB_CUR_MAX > 1) ? strlen (string) : 1;
- for (result = (WORD_LIST *)NULL, sindex = 0; string[sindex]; )
- {
- /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim
- unless multibyte chars are possible. */
- current_word = string_extract_verbatim (string, slen, &sindex, separators, xflags);
- if (current_word == 0)
- break;
-
- /* If we have a quoted empty string, add a quoted null argument. We
- want to preserve the quoted null character iff this is a quoted
- empty string; otherwise the quoted null characters are removed
- below. */
- if (QUOTED_NULL (current_word))
- {
- t = alloc_word_desc ();
- t->word = make_quoted_char ('\0');
- t->flags |= W_QUOTED|W_HASQUOTEDNULL;
- result = make_word_list (t, result);
- }
- else if (current_word[0] != '\0')
- {
- /* If we have something, then add it regardless. However,
- perform quoted null character removal on the current word. */
- remove_quoted_nulls (current_word);
- result = add_string_to_list (current_word, result);
- result->word->flags &= ~W_HASQUOTEDNULL; /* just to be sure */
- if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- result->word->flags |= W_QUOTED;
- }
-
- /* If we're not doing sequences of separators in the traditional
- Bourne shell style, then add a quoted null argument. */
- else if (!sh_style_split && !spctabnl (string[sindex]))
- {
- t = alloc_word_desc ();
- t->word = make_quoted_char ('\0');
- t->flags |= W_QUOTED|W_HASQUOTEDNULL;
- result = make_word_list (t, result);
- }
-
- free (current_word);
-
- /* Note whether or not the separator is IFS whitespace, used later. */
- whitesep = string[sindex] && spctabnl (string[sindex]);
-
- /* Move past the current separator character. */
- if (string[sindex])
- {
- DECLARE_MBSTATE;
- ADVANCE_CHAR (string, slen, sindex);
- }
-
- /* Now skip sequences of space, tab, or newline characters if they are
- in the list of separators. */
- while (string[sindex] && spctabnl (string[sindex]) && issep (string[sindex]))
- sindex++;
-
- /* If the first separator was IFS whitespace and the current character
- is a non-whitespace IFS character, it should be part of the current
- field delimiter, not a separate delimiter that would result in an
- empty field. Look at POSIX.2, 3.6.5, (3)(b). */
- if (string[sindex] && whitesep && issep (string[sindex]) && !spctabnl (string[sindex]))
- {
- sindex++;
- /* An IFS character that is not IFS white space, along with any
- adjacent IFS white space, shall delimit a field. (SUSv3) */
- while (string[sindex] && spctabnl (string[sindex]) && isifs (string[sindex]))
- sindex++;
- }
- }
- return (REVERSE_LIST (result, WORD_LIST *));
-}
-
-/* Parse a single word from STRING, using SEPARATORS to separate fields.
- ENDPTR is set to the first character after the word. This is used by
- the `read' builtin. This is never called with SEPARATORS != $IFS;
- it should be simplified.
-
- XXX - this function is very similar to list_string; they should be
- combined - XXX */
-char *
-get_word_from_string (stringp, separators, endptr)
- char **stringp, *separators, **endptr;
-{
- register char *s;
- char *current_word;
- int sindex, sh_style_split, whitesep, xflags;
- size_t slen;
-
- if (!stringp || !*stringp || !**stringp)
- return ((char *)NULL);
-
- sh_style_split = separators && separators[0] == ' ' &&
- separators[1] == '\t' &&
- separators[2] == '\n' &&
- separators[3] == '\0';
- for (xflags = 0, s = ifs_value; s && *s; s++)
- {
- if (*s == CTLESC) xflags |= SX_NOCTLESC;
- if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL;
- }
-
- s = *stringp;
- slen = 0;
-
- /* Remove sequences of whitespace at the beginning of STRING, as
- long as those characters appear in IFS. */
- if (sh_style_split || !separators || !*separators)
- {
- for (; *s && spctabnl (*s) && isifs (*s); s++);
-
- /* If the string is nothing but whitespace, update it and return. */
- if (!*s)
- {
- *stringp = s;
- if (endptr)
- *endptr = s;
- return ((char *)NULL);
- }
- }
-
- /* OK, S points to a word that does not begin with white space.
- Now extract a word, stopping at a separator, save a pointer to
- the first character after the word, then skip sequences of spc,
- tab, or nl as long as they are separators.
-
- This obeys the field splitting rules in Posix.2. */
- sindex = 0;
- /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim
- unless multibyte chars are possible. */
- slen = (MB_CUR_MAX > 1) ? strlen (s) : 1;
- current_word = string_extract_verbatim (s, slen, &sindex, separators, xflags);
-
- /* Set ENDPTR to the first character after the end of the word. */
- if (endptr)
- *endptr = s + sindex;
-
- /* Note whether or not the separator is IFS whitespace, used later. */
- whitesep = s[sindex] && spctabnl (s[sindex]);
-
- /* Move past the current separator character. */
- if (s[sindex])
- {
- DECLARE_MBSTATE;
- ADVANCE_CHAR (s, slen, sindex);
- }
-
- /* Now skip sequences of space, tab, or newline characters if they are
- in the list of separators. */
- while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex]))
- sindex++;
-
- /* If the first separator was IFS whitespace and the current character is
- a non-whitespace IFS character, it should be part of the current field
- delimiter, not a separate delimiter that would result in an empty field.
- Look at POSIX.2, 3.6.5, (3)(b). */
- if (s[sindex] && whitesep && isifs (s[sindex]) && !spctabnl (s[sindex]))
- {
- sindex++;
- /* An IFS character that is not IFS white space, along with any adjacent
- IFS white space, shall delimit a field. */
- while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex]))
- sindex++;
- }
-
- /* Update STRING to point to the next field. */
- *stringp = s + sindex;
- return (current_word);
-}
-
-/* Remove IFS white space at the end of STRING. Start at the end
- of the string and walk backwards until the beginning of the string
- or we find a character that's not IFS white space and not CTLESC.
- Only let CTLESC escape a white space character if SAW_ESCAPE is
- non-zero. */
-char *
-strip_trailing_ifs_whitespace (string, separators, saw_escape)
- char *string, *separators;
- int saw_escape;
-{
- char *s;
-
- s = string + STRLEN (string) - 1;
- while (s > string && ((spctabnl (*s) && isifs (*s)) ||
- (saw_escape && *s == CTLESC && spctabnl (s[1]))))
- s--;
- *++s = '\0';
- return string;
-}
-
-#if 0
-/* UNUSED */
-/* Split STRING into words at whitespace. Obeys shell-style quoting with
- backslashes, single and double quotes. */
-WORD_LIST *
-list_string_with_quotes (string)
- char *string;
-{
- WORD_LIST *list;
- char *token, *s;
- size_t s_len;
- int c, i, tokstart, len;
-
- for (s = string; s && *s && spctabnl (*s); s++)
- ;
- if (s == 0 || *s == 0)
- return ((WORD_LIST *)NULL);
-
- s_len = strlen (s);
- tokstart = i = 0;
- list = (WORD_LIST *)NULL;
- while (1)
- {
- c = s[i];
- if (c == '\\')
- {
- i++;
- if (s[i])
- i++;
- }
- else if (c == '\'')
- i = skip_single_quoted (s, s_len, ++i);
- else if (c == '"')
- i = skip_double_quoted (s, s_len, ++i);
- else if (c == 0 || spctabnl (c))
- {
- /* We have found the end of a token. Make a word out of it and
- add it to the word list. */
- token = substring (s, tokstart, i);
- list = add_string_to_list (token, list);
- free (token);
- while (spctabnl (s[i]))
- i++;
- if (s[i])
- tokstart = i;
- else
- break;
- }
- else
- i++; /* normal character */
- }
- return (REVERSE_LIST (list, WORD_LIST *));
-}
-#endif
-
-/********************************************************/
-/* */
-/* Functions to perform assignment statements */
-/* */
-/********************************************************/
-
-#if defined (ARRAY_VARS)
-static SHELL_VAR *
-do_compound_assignment (name, value, flags)
- char *name, *value;
- int flags;
-{
- SHELL_VAR *v;
- int mklocal, mkassoc;
- WORD_LIST *list;
-
- mklocal = flags & ASS_MKLOCAL;
- mkassoc = flags & ASS_MKASSOC;
-
- if (mklocal && variable_context)
- {
- v = find_variable (name);
- list = expand_compound_array_assignment (v, value, flags);
- if (mkassoc)
- v = make_local_assoc_variable (name);
- else if (v == 0 || (array_p (v) == 0 && assoc_p (v) == 0) || v->context != variable_context)
- v = make_local_array_variable (name);
- assign_compound_array_list (v, list, flags);
- }
- else
- v = assign_array_from_string (name, value, flags);
-
- return (v);
-}
-#endif
-
-/* Given STRING, an assignment string, get the value of the right side
- of the `=', and bind it to the left side. If EXPAND is true, then
- perform parameter expansion, command substitution, and arithmetic
- expansion on the right-hand side. Perform tilde expansion in any
- case. Do not perform word splitting on the result of expansion. */
-static int
-do_assignment_internal (word, expand)
- const WORD_DESC *word;
- int expand;
-{
- int offset, appendop, assign_list, aflags, retval;
- char *name, *value, *temp;
- SHELL_VAR *entry;
-#if defined (ARRAY_VARS)
- char *t;
- int ni;
-#endif
- const char *string;
-
- if (word == 0 || word->word == 0)
- return 0;
-
- appendop = assign_list = aflags = 0;
- string = word->word;
- offset = assignment (string, 0);
- name = savestring (string);
- value = (char *)NULL;
-
- if (name[offset] == '=')
- {
- if (name[offset - 1] == '+')
- {
- appendop = 1;
- name[offset - 1] = '\0';
- }
-
- name[offset] = 0; /* might need this set later */
- temp = name + offset + 1;
-
-#if defined (ARRAY_VARS)
- if (expand && (word->flags & W_COMPASSIGN))
- {
- assign_list = ni = 1;
- value = extract_array_assignment_list (temp, &ni);
- }
- else
-#endif
- if (expand && temp[0])
- value = expand_string_if_necessary (temp, 0, expand_string_assignment);
- else
- value = savestring (temp);
- }
-
- if (value == 0)
- {
- value = (char *)xmalloc (1);
- value[0] = '\0';
- }
-
- if (echo_command_at_execute)
- {
- if (appendop)
- name[offset - 1] = '+';
- xtrace_print_assignment (name, value, assign_list, 1);
- if (appendop)
- name[offset - 1] = '\0';
- }
-
-#define ASSIGN_RETURN(r) do { FREE (value); free (name); return (r); } while (0)
-
- if (appendop)
- aflags |= ASS_APPEND;
-
-#if defined (ARRAY_VARS)
- if (t = mbschr (name, '[')) /*]*/
- {
- if (assign_list)
- {
- report_error (_("%s: cannot assign list to array member"), name);
- ASSIGN_RETURN (0);
- }
- entry = assign_array_element (name, value, aflags);
- if (entry == 0)
- ASSIGN_RETURN (0);
- }
- else if (assign_list)
- {
- if (word->flags & W_ASSIGNARG)
- aflags |= ASS_MKLOCAL;
- if (word->flags & W_ASSIGNASSOC)
- aflags |= ASS_MKASSOC;
- entry = do_compound_assignment (name, value, aflags);
- }
- else
-#endif /* ARRAY_VARS */
- entry = bind_variable (name, value, aflags);
-
- stupidly_hack_special_variables (name);
-
-#if 1
- /* Return 1 if the assignment seems to have been performed correctly. */
- if (entry == 0 || readonly_p (entry))
- retval = 0; /* assignment failure */
- else if (noassign_p (entry))
- {
- last_command_exit_value = EXECUTION_FAILURE;
- retval = 1; /* error status, but not assignment failure */
- }
- else
- retval = 1;
-
- if (entry && retval != 0 && noassign_p (entry) == 0)
- VUNSETATTR (entry, att_invisible);
-
- ASSIGN_RETURN (retval);
-#else
- if (entry)
- VUNSETATTR (entry, att_invisible);
-
- ASSIGN_RETURN (entry ? ((readonly_p (entry) == 0) && noassign_p (entry) == 0) : 0);
-#endif
-}
-
-/* Perform the assignment statement in STRING, and expand the
- right side by doing tilde, command and parameter expansion. */
-int
-do_assignment (string)
- char *string;
-{
- WORD_DESC td;
-
- td.flags = W_ASSIGNMENT;
- td.word = string;
-
- return do_assignment_internal (&td, 1);
-}
-
-int
-do_word_assignment (word, flags)
- WORD_DESC *word;
- int flags;
-{
- return do_assignment_internal (word, 1);
-}
-
-/* Given STRING, an assignment string, get the value of the right side
- of the `=', and bind it to the left side. Do not perform any word
- expansions on the right hand side. */
-int
-do_assignment_no_expand (string)
- char *string;
-{
- WORD_DESC td;
-
- td.flags = W_ASSIGNMENT;
- td.word = string;
-
- return (do_assignment_internal (&td, 0));
-}
-
-/***************************************************
- * *
- * Functions to manage the positional parameters *
- * *
- ***************************************************/
-
-/* Return the word list that corresponds to `$*'. */
-WORD_LIST *
-list_rest_of_args ()
-{
- register WORD_LIST *list, *args;
- int i;
-
- /* Break out of the loop as soon as one of the dollar variables is null. */
- for (i = 1, list = (WORD_LIST *)NULL; i < 10 && dollar_vars[i]; i++)
- list = make_word_list (make_bare_word (dollar_vars[i]), list);
-
- for (args = rest_of_args; args; args = args->next)
- list = make_word_list (make_bare_word (args->word->word), list);
-
- return (REVERSE_LIST (list, WORD_LIST *));
-}
-
-int
-number_of_args ()
-{
- register WORD_LIST *list;
- int n;
-
- for (n = 0; n < 9 && dollar_vars[n+1]; n++)
- ;
- for (list = rest_of_args; list; list = list->next)
- n++;
- return n;
-}
-
-/* Return the value of a positional parameter. This handles values > 10. */
-char *
-get_dollar_var_value (ind)
- intmax_t ind;
-{
- char *temp;
- WORD_LIST *p;
-
- if (ind < 10)
- temp = dollar_vars[ind] ? savestring (dollar_vars[ind]) : (char *)NULL;
- else /* We want something like ${11} */
- {
- ind -= 10;
- for (p = rest_of_args; p && ind--; p = p->next)
- ;
- temp = p ? savestring (p->word->word) : (char *)NULL;
- }
- return (temp);
-}
-
-/* Make a single large string out of the dollar digit variables,
- and the rest_of_args. If DOLLAR_STAR is 1, then obey the special
- case of "$*" with respect to IFS. */
-char *
-string_rest_of_args (dollar_star)
- int dollar_star;
-{
- register WORD_LIST *list;
- char *string;
-
- list = list_rest_of_args ();
- string = dollar_star ? string_list_dollar_star (list) : string_list (list);
- dispose_words (list);
- return (string);
-}
-
-/* Return a string containing the positional parameters from START to
- END, inclusive. If STRING[0] == '*', we obey the rules for $*,
- which only makes a difference if QUOTED is non-zero. If QUOTED includes
- Q_HERE_DOCUMENT or Q_DOUBLE_QUOTES, this returns a quoted list, otherwise
- no quoting chars are added. */
-static char *
-pos_params (string, start, end, quoted)
- char *string;
- int start, end, quoted;
-{
- WORD_LIST *save, *params, *h, *t;
- char *ret;
- int i;
-
- /* see if we can short-circuit. if start == end, we want 0 parameters. */
- if (start == end)
- return ((char *)NULL);
-
- save = params = list_rest_of_args ();
- if (save == 0)
- return ((char *)NULL);
-
- if (start == 0) /* handle ${@:0[:x]} specially */
- {
- t = make_word_list (make_word (dollar_vars[0]), params);
- save = params = t;
- }
-
- for (i = start ? 1 : 0; params && i < start; i++)
- params = params->next;
- if (params == 0)
- return ((char *)NULL);
- for (h = t = params; params && i < end; i++)
- {
- t = params;
- params = params->next;
- }
-
- t->next = (WORD_LIST *)NULL;
-
- ret = string_list_pos_params (string[0], h, quoted);
-
- if (t != params)
- t->next = params;
-
- dispose_words (save);
- return (ret);
-}
-
-/******************************************************************/
-/* */
-/* Functions to expand strings to strings or WORD_LISTs */
-/* */
-/******************************************************************/
-
-#if defined (PROCESS_SUBSTITUTION)
-#define EXP_CHAR(s) (s == '$' || s == '`' || s == '<' || s == '>' || s == CTLESC || s == '~')
-#else
-#define EXP_CHAR(s) (s == '$' || s == '`' || s == CTLESC || s == '~')
-#endif
-
-/* If there are any characters in STRING that require full expansion,
- then call FUNC to expand STRING; otherwise just perform quote
- removal if necessary. This returns a new string. */
-static char *
-expand_string_if_necessary (string, quoted, func)
- char *string;
- int quoted;
- EXPFUNC *func;
-{
- WORD_LIST *list;
- size_t slen;
- int i, saw_quote;
- char *ret;
- DECLARE_MBSTATE;
-
- /* Don't need string length for ADVANCE_CHAR unless multibyte chars possible. */
- slen = (MB_CUR_MAX > 1) ? strlen (string) : 0;
- i = saw_quote = 0;
- while (string[i])
- {
- if (EXP_CHAR (string[i]))
- break;
- else if (string[i] == '\'' || string[i] == '\\' || string[i] == '"')
- saw_quote = 1;
- ADVANCE_CHAR (string, slen, i);
- }
-
- if (string[i])
- {
- list = (*func) (string, quoted);
- if (list)
- {
- ret = string_list (list);
- dispose_words (list);
- }
- else
- ret = (char *)NULL;
- }
- else if (saw_quote && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0))
- ret = string_quote_removal (string, quoted);
- else
- ret = savestring (string);
-
- return ret;
-}
-
-static inline char *
-expand_string_to_string_internal (string, quoted, func)
- char *string;
- int quoted;
- EXPFUNC *func;
-{
- WORD_LIST *list;
- char *ret;
-
- if (string == 0 || *string == '\0')
- return ((char *)NULL);
-
- list = (*func) (string, quoted);
- if (list)
- {
- ret = string_list (list);
- dispose_words (list);
- }
- else
- ret = (char *)NULL;
-
- return (ret);
-}
-
-char *
-expand_string_to_string (string, quoted)
- char *string;
- int quoted;
-{
- return (expand_string_to_string_internal (string, quoted, expand_string));
-}
-
-char *
-expand_string_unsplit_to_string (string, quoted)
- char *string;
- int quoted;
-{
- return (expand_string_to_string_internal (string, quoted, expand_string_unsplit));
-}
-
-char *
-expand_assignment_string_to_string (string, quoted)
- char *string;
- int quoted;
-{
- return (expand_string_to_string_internal (string, quoted, expand_string_assignment));
-}
-
-char *
-expand_arith_string (string, quoted)
- char *string;
- int quoted;
-{
- return (expand_string_if_necessary (string, quoted, expand_string));
-}
-
-#if defined (COND_COMMAND)
-/* Just remove backslashes in STRING. Returns a new string. */
-char *
-remove_backslashes (string)
- char *string;
-{
- char *r, *ret, *s;
-
- r = ret = (char *)xmalloc (strlen (string) + 1);
- for (s = string; s && *s; )
- {
- if (*s == '\\')
- s++;
- if (*s == 0)
- break;
- *r++ = *s++;
- }
- *r = '\0';
- return ret;
-}
-
-/* This needs better error handling. */
-/* Expand W for use as an argument to a unary or binary operator in a
- [[...]] expression. If SPECIAL is 1, this is the rhs argument
- to the != or == operator, and should be treated as a pattern. In
- this case, we quote the string specially for the globbing code. If
- SPECIAL is 2, this is an rhs argument for the =~ operator, and should
- be quoted appropriately for regcomp/regexec. The caller is responsible
- for removing the backslashes if the unquoted word is needed later. */
-char *
-cond_expand_word (w, special)
- WORD_DESC *w;
- int special;
-{
- char *r, *p;
- WORD_LIST *l;
- int qflags;
-
- if (w->word == 0 || w->word[0] == '\0')
- return ((char *)NULL);
-
- w->flags |= W_NOSPLIT2;
- l = call_expand_word_internal (w, 0, 0, (int *)0, (int *)0);
- if (l)
- {
- if (special == 0)
- {
- dequote_list (l);
- r = string_list (l);
- }
- else
- {
- qflags = QGLOB_CVTNULL;
- if (special == 2)
- qflags |= QGLOB_REGEXP;
- p = string_list (l);
- r = quote_string_for_globbing (p, qflags);
- free (p);
- }
- dispose_words (l);
- }
- else
- r = (char *)NULL;
-
- return r;
-}
-#endif
-
-/* Call expand_word_internal to expand W and handle error returns.
- A convenience function for functions that don't want to handle
- any errors or free any memory before aborting. */
-static WORD_LIST *
-call_expand_word_internal (w, q, i, c, e)
- WORD_DESC *w;
- int q, i, *c, *e;
-{
- WORD_LIST *result;
-
- result = expand_word_internal (w, q, i, c, e);
- if (result == &expand_word_error || result == &expand_word_fatal)
- {
- /* By convention, each time this error is returned, w->word has
- already been freed (it sometimes may not be in the fatal case,
- but that doesn't result in a memory leak because we're going
- to exit in most cases). */
- w->word = (char *)NULL;
- last_command_exit_value = EXECUTION_FAILURE;
- exp_jump_to_top_level ((result == &expand_word_error) ? DISCARD : FORCE_EOF);
- /* NOTREACHED */
- }
- else
- return (result);
-}
-
-/* Perform parameter expansion, command substitution, and arithmetic
- expansion on STRING, as if it were a word. Leave the result quoted.
- Since this does not perform word splitting, it leaves quoted nulls
- in the result. */
-static WORD_LIST *
-expand_string_internal (string, quoted)
- char *string;
- int quoted;
-{
- WORD_DESC td;
- WORD_LIST *tresult;
-
- if (string == 0 || *string == 0)
- return ((WORD_LIST *)NULL);
-
- td.flags = 0;
- td.word = savestring (string);
-
- tresult = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL);
-
- FREE (td.word);
- return (tresult);
-}
-
-/* Expand STRING by performing parameter expansion, command substitution,
- and arithmetic expansion. Dequote the resulting WORD_LIST before
- returning it, but do not perform word splitting. The call to
- remove_quoted_nulls () is in here because word splitting normally
- takes care of quote removal. */
-WORD_LIST *
-expand_string_unsplit (string, quoted)
- char *string;
- int quoted;
-{
- WORD_LIST *value;
-
- if (string == 0 || *string == '\0')
- return ((WORD_LIST *)NULL);
-
- expand_no_split_dollar_star = 1;
- value = expand_string_internal (string, quoted);
- expand_no_split_dollar_star = 0;
-
- if (value)
- {
- if (value->word)
- {
- remove_quoted_nulls (value->word->word);
- value->word->flags &= ~W_HASQUOTEDNULL;
- }
- dequote_list (value);
- }
- return (value);
-}
-
-/* Expand the rhs of an assignment statement */
-WORD_LIST *
-expand_string_assignment (string, quoted)
- char *string;
- int quoted;
-{
- WORD_DESC td;
- WORD_LIST *value;
-
- if (string == 0 || *string == '\0')
- return ((WORD_LIST *)NULL);
-
- expand_no_split_dollar_star = 1;
-
- td.flags = W_ASSIGNRHS;
- td.word = savestring (string);
- value = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL);
- FREE (td.word);
-
- expand_no_split_dollar_star = 0;
-
- if (value)
- {
- if (value->word)
- {
- remove_quoted_nulls (value->word->word);
- value->word->flags &= ~W_HASQUOTEDNULL;
- }
- dequote_list (value);
- }
- return (value);
-}
-
-
-/* Expand one of the PS? prompt strings. This is a sort of combination of
- expand_string_unsplit and expand_string_internal, but returns the
- passed string when an error occurs. Might want to trap other calls
- to jump_to_top_level here so we don't endlessly loop. */
-WORD_LIST *
-expand_prompt_string (string, quoted, wflags)
- char *string;
- int quoted;
- int wflags;
-{
- WORD_LIST *value;
- WORD_DESC td;
-
- if (string == 0 || *string == 0)
- return ((WORD_LIST *)NULL);
-
- td.flags = wflags;
- td.word = savestring (string);
-
- no_longjmp_on_fatal_error = 1;
- value = expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL);
- no_longjmp_on_fatal_error = 0;
-
- if (value == &expand_word_error || value == &expand_word_fatal)
- {
- value = make_word_list (make_bare_word (string), (WORD_LIST *)NULL);
- return value;
- }
- FREE (td.word);
- if (value)
- {
- if (value->word)
- {
- remove_quoted_nulls (value->word->word);
- value->word->flags &= ~W_HASQUOTEDNULL;
- }
- dequote_list (value);
- }
- return (value);
-}
-
-/* Expand STRING just as if you were expanding a word, but do not dequote
- the resultant WORD_LIST. This is called only from within this file,
- and is used to correctly preserve quoted characters when expanding
- things like ${1+"$@"}. This does parameter expansion, command
- substitution, arithmetic expansion, and word splitting. */
-static WORD_LIST *
-expand_string_leave_quoted (string, quoted)
- char *string;
- int quoted;
-{
- WORD_LIST *tlist;
- WORD_LIST *tresult;
-
- if (string == 0 || *string == '\0')
- return ((WORD_LIST *)NULL);
-
- tlist = expand_string_internal (string, quoted);
-
- if (tlist)
- {
- tresult = word_list_split (tlist);
- dispose_words (tlist);
- return (tresult);
- }
- return ((WORD_LIST *)NULL);
-}
-
-/* This does not perform word splitting or dequote the WORD_LIST
- it returns. */
-static WORD_LIST *
-expand_string_for_rhs (string, quoted, dollar_at_p, has_dollar_at)
- char *string;
- int quoted, *dollar_at_p, *has_dollar_at;
-{
- WORD_DESC td;
- WORD_LIST *tresult;
-
- if (string == 0 || *string == '\0')
- return (WORD_LIST *)NULL;
-
- td.flags = W_NOSPLIT2; /* no splitting, remove "" and '' */
- td.word = string;
- tresult = call_expand_word_internal (&td, quoted, 1, dollar_at_p, has_dollar_at);
- return (tresult);
-}
-
-/* Expand STRING just as if you were expanding a word. This also returns
- a list of words. Note that filename globbing is *NOT* done for word
- or string expansion, just when the shell is expanding a command. This
- does parameter expansion, command substitution, arithmetic expansion,
- and word splitting. Dequote the resultant WORD_LIST before returning. */
-WORD_LIST *
-expand_string (string, quoted)
- char *string;
- int quoted;
-{
- WORD_LIST *result;
-
- if (string == 0 || *string == '\0')
- return ((WORD_LIST *)NULL);
-
- result = expand_string_leave_quoted (string, quoted);
- return (result ? dequote_list (result) : result);
-}
-
-/***************************************************
- * *
- * Functions to handle quoting chars *
- * *
- ***************************************************/
-
-/* Conventions:
-
- A string with s[0] == CTLNUL && s[1] == 0 is a quoted null string.
- The parser passes CTLNUL as CTLESC CTLNUL. */
-
-/* Quote escape characters in string s, but no other characters. This is
- used to protect CTLESC and CTLNUL in variable values from the rest of
- the word expansion process after the variable is expanded (word splitting
- and filename generation). If IFS is null, we quote spaces as well, just
- in case we split on spaces later (in the case of unquoted $@, we will
- eventually attempt to split the entire word on spaces). Corresponding
- code exists in dequote_escapes. Even if we don't end up splitting on
- spaces, quoting spaces is not a problem. This should never be called on
- a string that is quoted with single or double quotes or part of a here
- document (effectively double-quoted). */
-char *
-quote_escapes (string)
- char *string;
-{
- register char *s, *t;
- size_t slen;
- char *result, *send;
- int quote_spaces, skip_ctlesc, skip_ctlnul;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- send = string + slen;
-
- quote_spaces = (ifs_value && *ifs_value == 0);
-
- for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++)
- skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL;
-
- t = result = (char *)xmalloc ((slen * 2) + 1);
- s = string;
-
- while (*s)
- {
- if ((skip_ctlesc == 0 && *s == CTLESC) || (skip_ctlnul == 0 && *s == CTLNUL) || (quote_spaces && *s == ' '))
- *t++ = CTLESC;
- COPY_CHAR_P (t, s, send);
- }
- *t = '\0';
- return (result);
-}
-
-static WORD_LIST *
-list_quote_escapes (list)
- WORD_LIST *list;
-{
- register WORD_LIST *w;
- char *t;
-
- for (w = list; w; w = w->next)
- {
- t = w->word->word;
- w->word->word = quote_escapes (t);
- free (t);
- }
- return list;
-}
-
-/* Inverse of quote_escapes; remove CTLESC protecting CTLESC or CTLNUL.
-
- The parser passes us CTLESC as CTLESC CTLESC and CTLNUL as CTLESC CTLNUL.
- This is necessary to make unquoted CTLESC and CTLNUL characters in the
- data stream pass through properly.
-
- We need to remove doubled CTLESC characters inside quoted strings before
- quoting the entire string, so we do not double the number of CTLESC
- characters.
-
- Also used by parts of the pattern substitution code. */
-char *
-dequote_escapes (string)
- char *string;
-{
- register char *s, *t, *s1;
- size_t slen;
- char *result, *send;
- int quote_spaces;
- DECLARE_MBSTATE;
-
- if (string == 0)
- return string;
-
- slen = strlen (string);
- send = string + slen;
-
- t = result = (char *)xmalloc (slen + 1);
-
- if (strchr (string, CTLESC) == 0)
- return (strcpy (result, string));
-
- quote_spaces = (ifs_value && *ifs_value == 0);
-
- s = string;
- while (*s)
- {
- if (*s == CTLESC && (s[1] == CTLESC || s[1] == CTLNUL || (quote_spaces && s[1] == ' ')))
- {
- s++;
- if (*s == '\0')
- break;
- }
- COPY_CHAR_P (t, s, send);
- }
- *t = '\0';
- return result;
-}
-
-/* Return a new string with the quoted representation of character C.
- This turns "" into QUOTED_NULL, so the W_HASQUOTEDNULL flag needs to be
- set in any resultant WORD_DESC where this value is the word. */
-static char *
-make_quoted_char (c)
- int c;
-{
- char *temp;
-
- temp = (char *)xmalloc (3);
- if (c == 0)
- {
- temp[0] = CTLNUL;
- temp[1] = '\0';
- }
- else
- {
- temp[0] = CTLESC;
- temp[1] = c;
- temp[2] = '\0';
- }
- return (temp);
-}
-
-/* Quote STRING, returning a new string. This turns "" into QUOTED_NULL, so
- the W_HASQUOTEDNULL flag needs to be set in any resultant WORD_DESC where
- this value is the word. */
-char *
-quote_string (string)
- char *string;
-{
- register char *t;
- size_t slen;
- char *result, *send;
-
- if (*string == 0)
- {
- result = (char *)xmalloc (2);
- result[0] = CTLNUL;
- result[1] = '\0';
- }
- else
- {
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- send = string + slen;
-
- result = (char *)xmalloc ((slen * 2) + 1);
-
- for (t = result; string < send; )
- {
- *t++ = CTLESC;
- COPY_CHAR_P (t, string, send);
- }
- *t = '\0';
- }
- return (result);
-}
-
-/* De-quote quoted characters in STRING. */
-char *
-dequote_string (string)
- char *string;
-{
- register char *s, *t;
- size_t slen;
- char *result, *send;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
-
- t = result = (char *)xmalloc (slen + 1);
-
- if (QUOTED_NULL (string))
- {
- result[0] = '\0';
- return (result);
- }
-
- /* If no character in the string can be quoted, don't bother examining
- each character. Just return a copy of the string passed to us. */
- if (strchr (string, CTLESC) == NULL)
- return (strcpy (result, string));
-
- send = string + slen;
- s = string;
- while (*s)
- {
- if (*s == CTLESC)
- {
- s++;
- if (*s == '\0')
- break;
- }
- COPY_CHAR_P (t, s, send);
- }
-
- *t = '\0';
- return (result);
-}
-
-/* Quote the entire WORD_LIST list. */
-static WORD_LIST *
-quote_list (list)
- WORD_LIST *list;
-{
- register WORD_LIST *w;
- char *t;
-
- for (w = list; w; w = w->next)
- {
- t = w->word->word;
- w->word->word = quote_string (t);
- if (*t == 0)
- w->word->flags |= W_HASQUOTEDNULL; /* XXX - turn on W_HASQUOTEDNULL here? */
- w->word->flags |= W_QUOTED;
- free (t);
- }
- return list;
-}
-
-/* De-quote quoted characters in each word in LIST. */
-WORD_LIST *
-dequote_list (list)
- WORD_LIST *list;
-{
- register char *s;
- register WORD_LIST *tlist;
-
- for (tlist = list; tlist; tlist = tlist->next)
- {
- s = dequote_string (tlist->word->word);
- if (QUOTED_NULL (tlist->word->word))
- tlist->word->flags &= ~W_HASQUOTEDNULL;
- free (tlist->word->word);
- tlist->word->word = s;
- }
- return list;
-}
-
-/* Remove CTLESC protecting a CTLESC or CTLNUL in place. Return the passed
- string. */
-char *
-remove_quoted_escapes (string)
- char *string;
-{
- char *t;
-
- if (string)
- {
- t = dequote_escapes (string);
- strcpy (string, t);
- free (t);
- }
-
- return (string);
-}
-
-/* Perform quoted null character removal on STRING. We don't allow any
- quoted null characters in the middle or at the ends of strings because
- of how expand_word_internal works. remove_quoted_nulls () turns
- STRING into an empty string iff it only consists of a quoted null,
- and removes all unquoted CTLNUL characters. */
-char *
-remove_quoted_nulls (string)
- char *string;
-{
- register size_t slen;
- register int i, j, prev_i;
- DECLARE_MBSTATE;
-
- if (strchr (string, CTLNUL) == 0) /* XXX */
- return string; /* XXX */
-
- slen = strlen (string);
- i = j = 0;
-
- while (i < slen)
- {
- if (string[i] == CTLESC)
- {
- /* Old code had j++, but we cannot assume that i == j at this
- point -- what if a CTLNUL has already been removed from the
- string? We don't want to drop the CTLESC or recopy characters
- that we've already copied down. */
- i++; string[j++] = CTLESC;
- if (i == slen)
- break;
- }
- else if (string[i] == CTLNUL)
- i++;
-
- prev_i = i;
- ADVANCE_CHAR (string, slen, i);
- if (j < prev_i)
- {
- do string[j++] = string[prev_i++]; while (prev_i < i);
- }
- else
- j = i;
- }
- string[j] = '\0';
-
- return (string);
-}
-
-/* Perform quoted null character removal on each element of LIST.
- This modifies LIST. */
-void
-word_list_remove_quoted_nulls (list)
- WORD_LIST *list;
-{
- register WORD_LIST *t;
-
- for (t = list; t; t = t->next)
- {
- remove_quoted_nulls (t->word->word);
- t->word->flags &= ~W_HASQUOTEDNULL;
- }
-}
-
-/* **************************************************************** */
-/* */
-/* Functions for Matching and Removing Patterns */
-/* */
-/* **************************************************************** */
-
-#if defined (HANDLE_MULTIBYTE)
-#if 0 /* Currently unused */
-static unsigned char *
-mb_getcharlens (string, len)
- char *string;
- int len;
-{
- int i, offset, last;
- unsigned char *ret;
- char *p;
- DECLARE_MBSTATE;
-
- i = offset = 0;
- last = 0;
- ret = (unsigned char *)xmalloc (len);
- memset (ret, 0, len);
- while (string[last])
- {
- ADVANCE_CHAR (string, len, offset);
- ret[last] = offset - last;
- last = offset;
- }
- return ret;
-}
-#endif
-#endif
-
-/* Remove the portion of PARAM matched by PATTERN according to OP, where OP
- can have one of 4 values:
- RP_LONG_LEFT remove longest matching portion at start of PARAM
- RP_SHORT_LEFT remove shortest matching portion at start of PARAM
- RP_LONG_RIGHT remove longest matching portion at end of PARAM
- RP_SHORT_RIGHT remove shortest matching portion at end of PARAM
-*/
-
-#define RP_LONG_LEFT 1
-#define RP_SHORT_LEFT 2
-#define RP_LONG_RIGHT 3
-#define RP_SHORT_RIGHT 4
-
-/* Returns its first argument if nothing matched; new memory otherwise */
-static char *
-remove_upattern (param, pattern, op)
- char *param, *pattern;
- int op;
-{
- register int len;
- register char *end;
- register char *p, *ret, c;
-
- len = STRLEN (param);
- end = param + len;
-
- switch (op)
- {
- case RP_LONG_LEFT: /* remove longest match at start */
- for (p = end; p >= param; p--)
- {
- c = *p; *p = '\0';
- if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- *p = c;
- return (savestring (p));
- }
- *p = c;
-
- }
- break;
-
- case RP_SHORT_LEFT: /* remove shortest match at start */
- for (p = param; p <= end; p++)
- {
- c = *p; *p = '\0';
- if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- *p = c;
- return (savestring (p));
- }
- *p = c;
- }
- break;
-
- case RP_LONG_RIGHT: /* remove longest match at end */
- for (p = param; p <= end; p++)
- {
- if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- c = *p; *p = '\0';
- ret = savestring (param);
- *p = c;
- return (ret);
- }
- }
- break;
-
- case RP_SHORT_RIGHT: /* remove shortest match at end */
- for (p = end; p >= param; p--)
- {
- if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- c = *p; *p = '\0';
- ret = savestring (param);
- *p = c;
- return (ret);
- }
- }
- break;
- }
-
- return (param); /* no match, return original string */
-}
-
-#if defined (HANDLE_MULTIBYTE)
-/* Returns its first argument if nothing matched; new memory otherwise */
-static wchar_t *
-remove_wpattern (wparam, wstrlen, wpattern, op)
- wchar_t *wparam;
- size_t wstrlen;
- wchar_t *wpattern;
- int op;
-{
- wchar_t wc, *ret;
- int n;
-
- switch (op)
- {
- case RP_LONG_LEFT: /* remove longest match at start */
- for (n = wstrlen; n >= 0; n--)
- {
- wc = wparam[n]; wparam[n] = L'\0';
- if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- wparam[n] = wc;
- return (wcsdup (wparam + n));
- }
- wparam[n] = wc;
- }
- break;
-
- case RP_SHORT_LEFT: /* remove shortest match at start */
- for (n = 0; n <= wstrlen; n++)
- {
- wc = wparam[n]; wparam[n] = L'\0';
- if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- wparam[n] = wc;
- return (wcsdup (wparam + n));
- }
- wparam[n] = wc;
- }
- break;
-
- case RP_LONG_RIGHT: /* remove longest match at end */
- for (n = 0; n <= wstrlen; n++)
- {
- if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- wc = wparam[n]; wparam[n] = L'\0';
- ret = wcsdup (wparam);
- wparam[n] = wc;
- return (ret);
- }
- }
- break;
-
- case RP_SHORT_RIGHT: /* remove shortest match at end */
- for (n = wstrlen; n >= 0; n--)
- {
- if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- wc = wparam[n]; wparam[n] = L'\0';
- ret = wcsdup (wparam);
- wparam[n] = wc;
- return (ret);
- }
- }
- break;
- }
-
- return (wparam); /* no match, return original string */
-}
-#endif /* HANDLE_MULTIBYTE */
-
-static char *
-remove_pattern (param, pattern, op)
- char *param, *pattern;
- int op;
-{
- char *xret;
-
- if (param == NULL)
- return (param);
- if (*param == '\0' || pattern == NULL || *pattern == '\0') /* minor optimization */
- return (savestring (param));
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1)
- {
- wchar_t *ret, *oret;
- size_t n;
- wchar_t *wparam, *wpattern;
- mbstate_t ps;
-
- n = xdupmbstowcs (&wpattern, NULL, pattern);
- if (n == (size_t)-1)
- {
- xret = remove_upattern (param, pattern, op);
- return ((xret == param) ? savestring (param) : xret);
- }
- n = xdupmbstowcs (&wparam, NULL, param);
- if (n == (size_t)-1)
- {
- free (wpattern);
- xret = remove_upattern (param, pattern, op);
- return ((xret == param) ? savestring (param) : xret);
- }
- oret = ret = remove_wpattern (wparam, n, wpattern, op);
- /* Don't bother to convert wparam back to multibyte string if nothing
- matched; just return copy of original string */
- if (ret == wparam)
- {
- free (wparam);
- free (wpattern);
- return (savestring (param));
- }
-
- free (wparam);
- free (wpattern);
-
- n = strlen (param);
- xret = (char *)xmalloc (n + 1);
- memset (&ps, '\0', sizeof (mbstate_t));
- n = wcsrtombs (xret, (const wchar_t **)&ret, n, &ps);
- xret[n] = '\0'; /* just to make sure */
- free (oret);
- return xret;
- }
- else
-#endif
- {
- xret = remove_upattern (param, pattern, op);
- return ((xret == param) ? savestring (param) : xret);
- }
-}
-
-/* Match PAT anywhere in STRING and return the match boundaries.
- This returns 1 in case of a successful match, 0 otherwise. SP
- and EP are pointers into the string where the match begins and
- ends, respectively. MTYPE controls what kind of match is attempted.
- MATCH_BEG and MATCH_END anchor the match at the beginning and end
- of the string, respectively. The longest match is returned. */
-static int
-match_upattern (string, pat, mtype, sp, ep)
- char *string, *pat;
- int mtype;
- char **sp, **ep;
-{
- int c, len, mlen;
- register char *p, *p1, *npat;
- char *end;
- int n1;
-
- /* If the pattern doesn't match anywhere in the string, go ahead and
- short-circuit right away. A minor optimization, saves a bunch of
- unnecessary calls to strmatch (up to N calls for a string of N
- characters) if the match is unsuccessful. To preserve the semantics
- of the substring matches below, we make sure that the pattern has
- `*' as first and last character, making a new pattern if necessary. */
- /* XXX - check this later if I ever implement `**' with special meaning,
- since this will potentially result in `**' at the beginning or end */
- len = STRLEN (pat);
- if (pat[0] != '*' || (pat[0] == '*' && pat[1] == LPAREN && extended_glob) || pat[len - 1] != '*')
- {
- p = npat = (char *)xmalloc (len + 3);
- p1 = pat;
- if (*p1 != '*' || (*p1 == '*' && p1[1] == LPAREN && extended_glob))
- *p++ = '*';
- while (*p1)
- *p++ = *p1++;
- if (p1[-1] != '*' || p[-2] == '\\')
- *p++ = '*';
- *p = '\0';
- }
- else
- npat = pat;
- c = strmatch (npat, string, FNMATCH_EXTFLAG);
- if (npat != pat)
- free (npat);
- if (c == FNM_NOMATCH)
- return (0);
-
- len = STRLEN (string);
- end = string + len;
-
- mlen = umatchlen (pat, len);
-
- switch (mtype)
- {
- case MATCH_ANY:
- for (p = string; p <= end; p++)
- {
- if (match_pattern_char (pat, p))
- {
-#if 0
- for (p1 = end; p1 >= p; p1--)
-#else
- p1 = (mlen == -1) ? end : p + mlen;
- /* p1 - p = length of portion of string to be considered
- p = current position in string
- mlen = number of characters consumed by match (-1 for entire string)
- end = end of string
- we want to break immediately if the potential match len
- is greater than the number of characters remaining in the
- string
- */
- if (p1 > end)
- break;
- for ( ; p1 >= p; p1--)
-#endif
- {
- c = *p1; *p1 = '\0';
- if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0)
- {
- *p1 = c;
- *sp = p;
- *ep = p1;
- return 1;
- }
- *p1 = c;
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
- }
- }
-
- return (0);
-
- case MATCH_BEG:
- if (match_pattern_char (pat, string) == 0)
- return (0);
-
-#if 0
- for (p = end; p >= string; p--)
-#else
- for (p = (mlen == -1) ? end : string + mlen; p >= string; p--)
-#endif
- {
- c = *p; *p = '\0';
- if (strmatch (pat, string, FNMATCH_EXTFLAG) == 0)
- {
- *p = c;
- *sp = string;
- *ep = p;
- return 1;
- }
- *p = c;
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
-
- return (0);
-
- case MATCH_END:
-#if 0
- for (p = string; p <= end; p++)
-#else
- for (p = end - ((mlen == -1) ? len : mlen); p <= end; p++)
-#endif
- {
- if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0)
- {
- *sp = p;
- *ep = end;
- return 1;
- }
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
-
- return (0);
- }
-
- return (0);
-}
-
-#if defined (HANDLE_MULTIBYTE)
-/* Match WPAT anywhere in WSTRING and return the match boundaries.
- This returns 1 in case of a successful match, 0 otherwise. Wide
- character version. */
-static int
-match_wpattern (wstring, indices, wstrlen, wpat, mtype, sp, ep)
- wchar_t *wstring;
- char **indices;
- size_t wstrlen;
- wchar_t *wpat;
- int mtype;
- char **sp, **ep;
-{
- wchar_t wc, *wp, *nwpat, *wp1;
- size_t len;
- int mlen;
- int n, n1, n2, simple;
-
- simple = (wpat[0] != L'\\' && wpat[0] != L'*' && wpat[0] != L'?' && wpat[0] != L'[');
-#if defined (EXTENDED_GLOB)
- if (extended_glob)
- simple |= (wpat[1] != L'(' || (wpat[0] != L'*' && wpat[0] != L'?' && wpat[0] != L'+' && wpat[0] != L'!' && wpat[0] != L'@')); /*)*/
-#endif
-
- /* If the pattern doesn't match anywhere in the string, go ahead and
- short-circuit right away. A minor optimization, saves a bunch of
- unnecessary calls to strmatch (up to N calls for a string of N
- characters) if the match is unsuccessful. To preserve the semantics
- of the substring matches below, we make sure that the pattern has
- `*' as first and last character, making a new pattern if necessary. */
- len = wcslen (wpat);
- if (wpat[0] != L'*' || (wpat[0] == L'*' && wpat[1] == WLPAREN && extended_glob) || wpat[len - 1] != L'*')
- {
- wp = nwpat = (wchar_t *)xmalloc ((len + 3) * sizeof (wchar_t));
- wp1 = wpat;
- if (*wp1 != L'*' || (*wp1 == '*' && wp1[1] == WLPAREN && extended_glob))
- *wp++ = L'*';
- while (*wp1 != L'\0')
- *wp++ = *wp1++;
- if (wp1[-1] != L'*' || wp1[-2] == L'\\')
- *wp++ = L'*';
- *wp = '\0';
- }
- else
- nwpat = wpat;
- len = wcsmatch (nwpat, wstring, FNMATCH_EXTFLAG);
- if (nwpat != wpat)
- free (nwpat);
- if (len == FNM_NOMATCH)
- return (0);
-
- mlen = wmatchlen (wpat, wstrlen);
-
-/* itrace("wmatchlen (%ls) -> %d", wpat, mlen); */
- switch (mtype)
- {
- case MATCH_ANY:
- for (n = 0; n <= wstrlen; n++)
- {
-#if 1
- n2 = simple ? (*wpat == wstring[n]) : match_pattern_wchar (wpat, wstring + n);
-#else
- n2 = match_pattern_wchar (wpat, wstring + n);
-#endif
- if (n2)
- {
-#if 0
- for (n1 = wstrlen; n1 >= n; n1--)
-#else
- n1 = (mlen == -1) ? wstrlen : n + mlen;
- if (n1 > wstrlen)
- break;
-
- for ( ; n1 >= n; n1--)
-#endif
- {
- wc = wstring[n1]; wstring[n1] = L'\0';
- if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0)
- {
- wstring[n1] = wc;
- *sp = indices[n];
- *ep = indices[n1];
- return 1;
- }
- wstring[n1] = wc;
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
- }
- }
-
- return (0);
-
- case MATCH_BEG:
- if (match_pattern_wchar (wpat, wstring) == 0)
- return (0);
-
-#if 0
- for (n = wstrlen; n >= 0; n--)
-#else
- for (n = (mlen == -1) ? wstrlen : mlen; n >= 0; n--)
-#endif
- {
- wc = wstring[n]; wstring[n] = L'\0';
- if (wcsmatch (wpat, wstring, FNMATCH_EXTFLAG) == 0)
- {
- wstring[n] = wc;
- *sp = indices[0];
- *ep = indices[n];
- return 1;
- }
- wstring[n] = wc;
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
-
- return (0);
-
- case MATCH_END:
-#if 0
- for (n = 0; n <= wstrlen; n++)
-#else
- for (n = wstrlen - ((mlen == -1) ? wstrlen : mlen); n <= wstrlen; n++)
-#endif
- {
- if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0)
- {
- *sp = indices[n];
- *ep = indices[wstrlen];
- return 1;
- }
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
-
- return (0);
- }
-
- return (0);
-}
-#endif /* HANDLE_MULTIBYTE */
-
-static int
-match_pattern (string, pat, mtype, sp, ep)
- char *string, *pat;
- int mtype;
- char **sp, **ep;
-{
-#if defined (HANDLE_MULTIBYTE)
- int ret;
- size_t n;
- wchar_t *wstring, *wpat;
- char **indices;
- size_t slen, plen, mslen, mplen;
-#endif
-
- if (string == 0 || *string == 0 || pat == 0 || *pat == 0)
- return (0);
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1)
- {
-#if 0
- slen = STRLEN (string);
- mslen = MBSLEN (string);
- plen = STRLEN (pat);
- mplen = MBSLEN (pat);
- if (slen == mslen && plen == mplen)
-#else
- if (mbsmbchar (string) == 0 && mbsmbchar (pat) == 0)
-#endif
- return (match_upattern (string, pat, mtype, sp, ep));
-
- n = xdupmbstowcs (&wpat, NULL, pat);
- if (n == (size_t)-1)
- return (match_upattern (string, pat, mtype, sp, ep));
- n = xdupmbstowcs (&wstring, &indices, string);
- if (n == (size_t)-1)
- {
- free (wpat);
- return (match_upattern (string, pat, mtype, sp, ep));
- }
- ret = match_wpattern (wstring, indices, n, wpat, mtype, sp, ep);
-
- free (wpat);
- free (wstring);
- free (indices);
-
- return (ret);
- }
- else
-#endif
- return (match_upattern (string, pat, mtype, sp, ep));
-}
-
-static int
-getpatspec (c, value)
- int c;
- char *value;
-{
- if (c == '#')
- return ((*value == '#') ? RP_LONG_LEFT : RP_SHORT_LEFT);
- else /* c == '%' */
- return ((*value == '%') ? RP_LONG_RIGHT : RP_SHORT_RIGHT);
-}
-
-/* Posix.2 says that the WORD should be run through tilde expansion,
- parameter expansion, command substitution and arithmetic expansion.
- This leaves the result quoted, so quote_string_for_globbing () has
- to be called to fix it up for strmatch (). If QUOTED is non-zero,
- it means that the entire expression was enclosed in double quotes.
- This means that quoting characters in the pattern do not make any
- special pattern characters quoted. For example, the `*' in the
- following retains its special meaning: "${foo#'*'}". */
-static char *
-getpattern (value, quoted, expandpat)
- char *value;
- int quoted, expandpat;
-{
- char *pat, *tword;
- WORD_LIST *l;
-#if 0
- int i;
-#endif
- /* There is a problem here: how to handle single or double quotes in the
- pattern string when the whole expression is between double quotes?
- POSIX.2 says that enclosing double quotes do not cause the pattern to
- be quoted, but does that leave us a problem with @ and array[@] and their
- expansions inside a pattern? */
-#if 0
- if (expandpat && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *tword)
- {
- i = 0;
- pat = string_extract_double_quoted (tword, &i, 1);
- free (tword);
- tword = pat;
- }
-#endif
-
- /* expand_string_for_rhs () leaves WORD quoted and does not perform
- word splitting. */
- l = *value ? expand_string_for_rhs (value,
- (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? Q_PATQUOTE : quoted,
- (int *)NULL, (int *)NULL)
- : (WORD_LIST *)0;
- pat = string_list (l);
- dispose_words (l);
- if (pat)
- {
- tword = quote_string_for_globbing (pat, QGLOB_CVTNULL);
- free (pat);
- pat = tword;
- }
- return (pat);
-}
-
-#if 0
-/* Handle removing a pattern from a string as a result of ${name%[%]value}
- or ${name#[#]value}. */
-static char *
-variable_remove_pattern (value, pattern, patspec, quoted)
- char *value, *pattern;
- int patspec, quoted;
-{
- char *tword;
-
- tword = remove_pattern (value, pattern, patspec);
-
- return (tword);
-}
-#endif
-
-static char *
-list_remove_pattern (list, pattern, patspec, itype, quoted)
- WORD_LIST *list;
- char *pattern;
- int patspec, itype, quoted;
-{
- WORD_LIST *new, *l;
- WORD_DESC *w;
- char *tword;
-
- for (new = (WORD_LIST *)NULL, l = list; l; l = l->next)
- {
- tword = remove_pattern (l->word->word, pattern, patspec);
- w = alloc_word_desc ();
- w->word = tword ? tword : savestring ("");
- new = make_word_list (w, new);
- }
-
- l = REVERSE_LIST (new, WORD_LIST *);
- tword = string_list_pos_params (itype, l, quoted);
- dispose_words (l);
-
- return (tword);
-}
-
-static char *
-parameter_list_remove_pattern (itype, pattern, patspec, quoted)
- int itype;
- char *pattern;
- int patspec, quoted;
-{
- char *ret;
- WORD_LIST *list;
-
- list = list_rest_of_args ();
- if (list == 0)
- return ((char *)NULL);
- ret = list_remove_pattern (list, pattern, patspec, itype, quoted);
- dispose_words (list);
- return (ret);
-}
-
-#if defined (ARRAY_VARS)
-static char *
-array_remove_pattern (var, pattern, patspec, varname, quoted)
- SHELL_VAR *var;
- char *pattern;
- int patspec;
- char *varname; /* so we can figure out how it's indexed */
- int quoted;
-{
- ARRAY *a;
- HASH_TABLE *h;
- int itype;
- char *ret;
- WORD_LIST *list;
- SHELL_VAR *v;
-
- /* compute itype from varname here */
- v = array_variable_part (varname, &ret, 0);
- itype = ret[0];
-
- a = (v && array_p (v)) ? array_cell (v) : 0;
- h = (v && assoc_p (v)) ? assoc_cell (v) : 0;
-
- list = a ? array_to_word_list (a) : (h ? assoc_to_word_list (h) : 0);
- if (list == 0)
- return ((char *)NULL);
- ret = list_remove_pattern (list, pattern, patspec, itype, quoted);
- dispose_words (list);
-
- return ret;
-}
-#endif /* ARRAY_VARS */
-
-static char *
-parameter_brace_remove_pattern (varname, value, ind, patstr, rtype, quoted, flags)
- char *varname, *value;
- int ind;
- char *patstr;
- int rtype, quoted, flags;
-{
- int vtype, patspec, starsub;
- char *temp1, *val, *pattern;
- SHELL_VAR *v;
-
- if (value == 0)
- return ((char *)NULL);
-
- this_command_name = varname;
-
- vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val);
- if (vtype == -1)
- return ((char *)NULL);
-
- starsub = vtype & VT_STARSUB;
- vtype &= ~VT_STARSUB;
-
- patspec = getpatspec (rtype, patstr);
- if (patspec == RP_LONG_LEFT || patspec == RP_LONG_RIGHT)
- patstr++;
-
- /* Need to pass getpattern newly-allocated memory in case of expansion --
- the expansion code will free the passed string on an error. */
- temp1 = savestring (patstr);
- pattern = getpattern (temp1, quoted, 1);
- free (temp1);
-
- temp1 = (char *)NULL; /* shut up gcc */
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
- temp1 = remove_pattern (val, pattern, patspec);
- if (vtype == VT_VARIABLE)
- FREE (val);
- if (temp1)
- {
- val = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- ? quote_string (temp1)
- : quote_escapes (temp1);
- free (temp1);
- temp1 = val;
- }
- break;
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- temp1 = array_remove_pattern (v, pattern, patspec, varname, quoted);
- if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0))
- {
- val = quote_escapes (temp1);
- free (temp1);
- temp1 = val;
- }
- break;
-#endif
- case VT_POSPARMS:
- temp1 = parameter_list_remove_pattern (varname[0], pattern, patspec, quoted);
- if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0))
- {
- val = quote_escapes (temp1);
- free (temp1);
- temp1 = val;
- }
- break;
- }
-
- FREE (pattern);
- return temp1;
-}
-
-/*******************************************
- * *
- * Functions to expand WORD_DESCs *
- * *
- *******************************************/
-
-/* Expand WORD, performing word splitting on the result. This does
- parameter expansion, command substitution, arithmetic expansion,
- word splitting, and quote removal. */
-
-WORD_LIST *
-expand_word (word, quoted)
- WORD_DESC *word;
- int quoted;
-{
- WORD_LIST *result, *tresult;
-
- tresult = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL);
- result = word_list_split (tresult);
- dispose_words (tresult);
- return (result ? dequote_list (result) : result);
-}
-
-/* Expand WORD, but do not perform word splitting on the result. This
- does parameter expansion, command substitution, arithmetic expansion,
- and quote removal. */
-WORD_LIST *
-expand_word_unsplit (word, quoted)
- WORD_DESC *word;
- int quoted;
-{
- WORD_LIST *result;
-
- expand_no_split_dollar_star = 1;
-#if defined (HANDLE_MULTIBYTE)
- if (ifs_firstc[0] == 0)
-#else
- if (ifs_firstc == 0)
-#endif
- word->flags |= W_NOSPLIT;
- result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL);
- expand_no_split_dollar_star = 0;
-
- return (result ? dequote_list (result) : result);
-}
-
-/* Perform shell expansions on WORD, but do not perform word splitting or
- quote removal on the result. Virtually identical to expand_word_unsplit;
- could be combined if implementations don't diverge. */
-WORD_LIST *
-expand_word_leave_quoted (word, quoted)
- WORD_DESC *word;
- int quoted;
-{
- WORD_LIST *result;
-
- expand_no_split_dollar_star = 1;
-#if defined (HANDLE_MULTIBYTE)
- if (ifs_firstc[0] == 0)
-#else
- if (ifs_firstc == 0)
-#endif
- word->flags |= W_NOSPLIT;
- word->flags |= W_NOSPLIT2;
- result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL);
- expand_no_split_dollar_star = 0;
-
- return result;
-}
-
-#if defined (PROCESS_SUBSTITUTION)
-
-/*****************************************************************/
-/* */
-/* Hacking Process Substitution */
-/* */
-/*****************************************************************/
-
-#if !defined (HAVE_DEV_FD)
-/* Named pipes must be removed explicitly with `unlink'. This keeps a list
- of FIFOs the shell has open. unlink_fifo_list will walk the list and
- unlink all of them. add_fifo_list adds the name of an open FIFO to the
- list. NFIFO is a count of the number of FIFOs in the list. */
-#define FIFO_INCR 20
-
-struct temp_fifo {
- char *file;
- pid_t proc;
-};
-
-static struct temp_fifo *fifo_list = (struct temp_fifo *)NULL;
-static int nfifo;
-static int fifo_list_size;
-
-char *
-copy_fifo_list (sizep)
- int *sizep;
-{
- if (sizep)
- *sizep = 0;
- return (char *)NULL;
-}
-
-static void
-add_fifo_list (pathname)
- char *pathname;
-{
- if (nfifo >= fifo_list_size - 1)
- {
- fifo_list_size += FIFO_INCR;
- fifo_list = (struct temp_fifo *)xrealloc (fifo_list,
- fifo_list_size * sizeof (struct temp_fifo));
- }
-
- fifo_list[nfifo].file = savestring (pathname);
- nfifo++;
-}
-
-void
-unlink_fifo (i)
- int i;
-{
- if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1))
- {
- unlink (fifo_list[i].file);
- free (fifo_list[i].file);
- fifo_list[i].file = (char *)NULL;
- fifo_list[i].proc = -1;
- }
-}
-
-void
-unlink_fifo_list ()
-{
- int saved, i, j;
-
- if (nfifo == 0)
- return;
-
- for (i = saved = 0; i < nfifo; i++)
- {
- if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1))
- {
- unlink (fifo_list[i].file);
- free (fifo_list[i].file);
- fifo_list[i].file = (char *)NULL;
- fifo_list[i].proc = -1;
- }
- else
- saved++;
- }
-
- /* If we didn't remove some of the FIFOs, compact the list. */
- if (saved)
- {
- for (i = j = 0; i < nfifo; i++)
- if (fifo_list[i].file)
- {
- fifo_list[j].file = fifo_list[i].file;
- fifo_list[j].proc = fifo_list[i].proc;
- j++;
- }
- nfifo = j;
- }
- else
- nfifo = 0;
-}
-
-/* Take LIST, which is a bitmap denoting active FIFOs in fifo_list
- from some point in the past, and close all open FIFOs in fifo_list
- that are not marked as active in LIST. If LIST is NULL, close
- everything in fifo_list. LSIZE is the number of elements in LIST, in
- case it's larger than fifo_list_size (size of fifo_list). */
-void
-close_new_fifos (list, lsize)
- char *list;
- int lsize;
-{
- int i;
-
- if (list == 0)
- {
- unlink_fifo_list ();
- return;
- }
-
- for (i = 0; i < lsize; i++)
- if (list[i] == 0 && i < fifo_list_size && fifo_list[i].proc != -1)
- unlink_fifo (i);
-
- for (i = lsize; i < fifo_list_size; i++)
- unlink_fifo (i);
-}
-
-int
-fifos_pending ()
-{
- return nfifo;
-}
-
-int
-num_fifos ()
-{
- return nfifo;
-}
-
-static char *
-make_named_pipe ()
-{
- char *tname;
-
- tname = sh_mktmpname ("sh-np", MT_USERANDOM|MT_USETMPDIR);
- if (mkfifo (tname, 0600) < 0)
- {
- free (tname);
- return ((char *)NULL);
- }
-
- add_fifo_list (tname);
- return (tname);
-}
-
-#else /* HAVE_DEV_FD */
-
-/* DEV_FD_LIST is a bitmap of file descriptors attached to pipes the shell
- has open to children. NFDS is a count of the number of bits currently
- set in DEV_FD_LIST. TOTFDS is a count of the highest possible number
- of open files. */
-static char *dev_fd_list = (char *)NULL;
-static int nfds;
-static int totfds; /* The highest possible number of open files. */
-
-char *
-copy_fifo_list (sizep)
- int *sizep;
-{
- char *ret;
-
- if (nfds == 0 || totfds == 0)
- {
- if (sizep)
- *sizep = 0;
- return (char *)NULL;
- }
-
- if (sizep)
- *sizep = totfds;
- ret = (char *)xmalloc (totfds);
- return (memcpy (ret, dev_fd_list, totfds));
-}
-
-static void
-add_fifo_list (fd)
- int fd;
-{
- if (dev_fd_list == 0 || fd >= totfds)
- {
- int ofds;
-
- ofds = totfds;
- totfds = getdtablesize ();
- if (totfds < 0 || totfds > 256)
- totfds = 256;
- if (fd >= totfds)
- totfds = fd + 2;
-
- dev_fd_list = (char *)xrealloc (dev_fd_list, totfds);
- memset (dev_fd_list + ofds, '\0', totfds - ofds);
- }
-
- dev_fd_list[fd] = 1;
- nfds++;
-}
-
-int
-fifos_pending ()
-{
- return 0; /* used for cleanup; not needed with /dev/fd */
-}
-
-int
-num_fifos ()
-{
- return nfds;
-}
-
-void
-unlink_fifo (fd)
- int fd;
-{
- if (dev_fd_list[fd])
- {
- close (fd);
- dev_fd_list[fd] = 0;
- nfds--;
- }
-}
-
-void
-unlink_fifo_list ()
-{
- register int i;
-
- if (nfds == 0)
- return;
-
- for (i = 0; nfds && i < totfds; i++)
- unlink_fifo (i);
-
- nfds = 0;
-}
-
-/* Take LIST, which is a snapshot copy of dev_fd_list from some point in
- the past, and close all open fds in dev_fd_list that are not marked
- as open in LIST. If LIST is NULL, close everything in dev_fd_list.
- LSIZE is the number of elements in LIST, in case it's larger than
- totfds (size of dev_fd_list). */
-void
-close_new_fifos (list, lsize)
- char *list;
- int lsize;
-{
- int i;
-
- if (list == 0)
- {
- unlink_fifo_list ();
- return;
- }
-
- for (i = 0; i < lsize; i++)
- if (list[i] == 0 && i < totfds && dev_fd_list[i])
- unlink_fifo (i);
-
- for (i = lsize; i < totfds; i++)
- unlink_fifo (i);
-}
-
-#if defined (NOTDEF)
-print_dev_fd_list ()
-{
- register int i;
-
- fprintf (stderr, "pid %ld: dev_fd_list:", (long)getpid ());
- fflush (stderr);
-
- for (i = 0; i < totfds; i++)
- {
- if (dev_fd_list[i])
- fprintf (stderr, " %d", i);
- }
- fprintf (stderr, "\n");
-}
-#endif /* NOTDEF */
-
-static char *
-make_dev_fd_filename (fd)
- int fd;
-{
- char *ret, intbuf[INT_STRLEN_BOUND (int) + 1], *p;
-
- ret = (char *)xmalloc (sizeof (DEV_FD_PREFIX) + 8);
-
- strcpy (ret, DEV_FD_PREFIX);
- p = inttostr (fd, intbuf, sizeof (intbuf));
- strcpy (ret + sizeof (DEV_FD_PREFIX) - 1, p);
-
- add_fifo_list (fd);
- return (ret);
-}
-
-#endif /* HAVE_DEV_FD */
-
-/* Return a filename that will open a connection to the process defined by
- executing STRING. HAVE_DEV_FD, if defined, means open a pipe and return
- a filename in /dev/fd corresponding to a descriptor that is one of the
- ends of the pipe. If not defined, we use named pipes on systems that have
- them. Systems without /dev/fd and named pipes are out of luck.
-
- OPEN_FOR_READ_IN_CHILD, if 1, means open the named pipe for reading or
- use the read end of the pipe and dup that file descriptor to fd 0 in
- the child. If OPEN_FOR_READ_IN_CHILD is 0, we open the named pipe for
- writing or use the write end of the pipe in the child, and dup that
- file descriptor to fd 1 in the child. The parent does the opposite. */
-
-static char *
-process_substitute (string, open_for_read_in_child)
- char *string;
- int open_for_read_in_child;
-{
- char *pathname;
- int fd, result;
- pid_t old_pid, pid;
-#if defined (HAVE_DEV_FD)
- int parent_pipe_fd, child_pipe_fd;
- int fildes[2];
-#endif /* HAVE_DEV_FD */
-#if defined (JOB_CONTROL)
- pid_t old_pipeline_pgrp;
-#endif
-
- if (!string || !*string || wordexp_only)
- return ((char *)NULL);
-
-#if !defined (HAVE_DEV_FD)
- pathname = make_named_pipe ();
-#else /* HAVE_DEV_FD */
- if (pipe (fildes) < 0)
- {
- sys_error (_("cannot make pipe for process substitution"));
- return ((char *)NULL);
- }
- /* If OPEN_FOR_READ_IN_CHILD == 1, we want to use the write end of
- the pipe in the parent, otherwise the read end. */
- parent_pipe_fd = fildes[open_for_read_in_child];
- child_pipe_fd = fildes[1 - open_for_read_in_child];
- /* Move the parent end of the pipe to some high file descriptor, to
- avoid clashes with FDs used by the script. */
- parent_pipe_fd = move_to_high_fd (parent_pipe_fd, 1, 64);
-
- pathname = make_dev_fd_filename (parent_pipe_fd);
-#endif /* HAVE_DEV_FD */
-
- if (pathname == 0)
- {
- sys_error (_("cannot make pipe for process substitution"));
- return ((char *)NULL);
- }
-
- old_pid = last_made_pid;
-
-#if defined (JOB_CONTROL)
- old_pipeline_pgrp = pipeline_pgrp;
- pipeline_pgrp = shell_pgrp;
- save_pipeline (1);
-#endif /* JOB_CONTROL */
-
- pid = make_child ((char *)NULL, 1);
- if (pid == 0)
- {
- reset_terminating_signals (); /* XXX */
- free_pushed_string_input ();
- /* Cancel traps, in trap.c. */
- restore_original_signals (); /* XXX - what about special builtins? bash-4.2 */
- setup_async_signals ();
- subshell_environment |= SUBSHELL_COMSUB|SUBSHELL_PROCSUB;
- }
-
-#if defined (JOB_CONTROL)
- set_sigchld_handler ();
- stop_making_children ();
- /* XXX - should we only do this in the parent? (as in command subst) */
- pipeline_pgrp = old_pipeline_pgrp;
-#endif /* JOB_CONTROL */
-
- if (pid < 0)
- {
- sys_error (_("cannot make child for process substitution"));
- free (pathname);
-#if defined (HAVE_DEV_FD)
- close (parent_pipe_fd);
- close (child_pipe_fd);
-#endif /* HAVE_DEV_FD */
- return ((char *)NULL);
- }
-
- if (pid > 0)
- {
-#if defined (JOB_CONTROL)
- restore_pipeline (1);
-#endif
-
-#if !defined (HAVE_DEV_FD)
- fifo_list[nfifo-1].proc = pid;
-#endif
-
- last_made_pid = old_pid;
-
-#if defined (JOB_CONTROL) && defined (PGRP_PIPE)
- close_pgrp_pipe ();
-#endif /* JOB_CONTROL && PGRP_PIPE */
-
-#if defined (HAVE_DEV_FD)
- close (child_pipe_fd);
-#endif /* HAVE_DEV_FD */
-
- return (pathname);
- }
-
- set_sigint_handler ();
-
-#if defined (JOB_CONTROL)
- set_job_control (0);
-#endif /* JOB_CONTROL */
-
-#if !defined (HAVE_DEV_FD)
- /* Open the named pipe in the child. */
- fd = open (pathname, open_for_read_in_child ? O_RDONLY|O_NONBLOCK : O_WRONLY);
- if (fd < 0)
- {
- /* Two separate strings for ease of translation. */
- if (open_for_read_in_child)
- sys_error (_("cannot open named pipe %s for reading"), pathname);
- else
- sys_error (_("cannot open named pipe %s for writing"), pathname);
-
- exit (127);
- }
- if (open_for_read_in_child)
- {
- if (sh_unset_nodelay_mode (fd) < 0)
- {
- sys_error (_("cannot reset nodelay mode for fd %d"), fd);
- exit (127);
- }
- }
-#else /* HAVE_DEV_FD */
- fd = child_pipe_fd;
-#endif /* HAVE_DEV_FD */
-
- if (dup2 (fd, open_for_read_in_child ? 0 : 1) < 0)
- {
- sys_error (_("cannot duplicate named pipe %s as fd %d"), pathname,
- open_for_read_in_child ? 0 : 1);
- exit (127);
- }
-
- if (fd != (open_for_read_in_child ? 0 : 1))
- close (fd);
-
- /* Need to close any files that this process has open to pipes inherited
- from its parent. */
- if (current_fds_to_close)
- {
- close_fd_bitmap (current_fds_to_close);
- current_fds_to_close = (struct fd_bitmap *)NULL;
- }
-
-#if defined (HAVE_DEV_FD)
- /* Make sure we close the parent's end of the pipe and clear the slot
- in the fd list so it is not closed later, if reallocated by, for
- instance, pipe(2). */
- close (parent_pipe_fd);
- dev_fd_list[parent_pipe_fd] = 0;
-#endif /* HAVE_DEV_FD */
-
- result = parse_and_execute (string, "process substitution", (SEVAL_NONINT|SEVAL_NOHIST));
-
-#if !defined (HAVE_DEV_FD)
- /* Make sure we close the named pipe in the child before we exit. */
- close (open_for_read_in_child ? 0 : 1);
-#endif /* !HAVE_DEV_FD */
-
- exit (result);
- /*NOTREACHED*/
-}
-#endif /* PROCESS_SUBSTITUTION */
-
-/***********************************/
-/* */
-/* Command Substitution */
-/* */
-/***********************************/
-
-static char *
-read_comsub (fd, quoted, rflag)
- int fd, quoted;
- int *rflag;
-{
- char *istring, buf[128], *bufp, *s;
- int istring_index, istring_size, c, tflag, skip_ctlesc, skip_ctlnul;
- ssize_t bufn;
-
- istring = (char *)NULL;
- istring_index = istring_size = bufn = tflag = 0;
-
- for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++)
- skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL;
-
- /* Read the output of the command through the pipe. This may need to be
- changed to understand multibyte characters in the future. */
- while (1)
- {
- if (fd < 0)
- break;
- if (--bufn <= 0)
- {
- bufn = zread (fd, buf, sizeof (buf));
- if (bufn <= 0)
- break;
- bufp = buf;
- }
- c = *bufp++;
-
- if (c == 0)
- {
-#if 0
- internal_warning ("read_comsub: ignored null byte in input");
-#endif
- continue;
- }
-
- /* Add the character to ISTRING, possibly after resizing it. */
- RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, DEFAULT_ARRAY_SIZE);
-
- /* This is essentially quote_string inline */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) /* || c == CTLESC || c == CTLNUL */)
- istring[istring_index++] = CTLESC;
- /* Escape CTLESC and CTLNUL in the output to protect those characters
- from the rest of the word expansions (word splitting and globbing.)
- This is essentially quote_escapes inline. */
- else if (skip_ctlesc == 0 && c == CTLESC)
- {
- tflag |= W_HASCTLESC;
- istring[istring_index++] = CTLESC;
- }
- else if ((skip_ctlnul == 0 && c == CTLNUL) || (c == ' ' && (ifs_value && *ifs_value == 0)))
- istring[istring_index++] = CTLESC;
-
- istring[istring_index++] = c;
-
-#if 0
-#if defined (__CYGWIN__)
- if (c == '\n' && istring_index > 1 && istring[istring_index - 2] == '\r')
- {
- istring_index--;
- istring[istring_index - 1] = '\n';
- }
-#endif
-#endif
- }
-
- if (istring)
- istring[istring_index] = '\0';
-
- /* If we read no output, just return now and save ourselves some
- trouble. */
- if (istring_index == 0)
- {
- FREE (istring);
- if (rflag)
- *rflag = tflag;
- return (char *)NULL;
- }
-
- /* Strip trailing newlines from the output of the command. */
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- {
- while (istring_index > 0)
- {
- if (istring[istring_index - 1] == '\n')
- {
- --istring_index;
-
- /* If the newline was quoted, remove the quoting char. */
- if (istring[istring_index - 1] == CTLESC)
- --istring_index;
- }
- else
- break;
- }
- istring[istring_index] = '\0';
- }
- else
- strip_trailing (istring, istring_index - 1, 1);
-
- if (rflag)
- *rflag = tflag;
- return istring;
-}
-
-/* Perform command substitution on STRING. This returns a WORD_DESC * with the
- contained string possibly quoted. */
-WORD_DESC *
-command_substitute (string, quoted)
- char *string;
- int quoted;
-{
- pid_t pid, old_pid, old_pipeline_pgrp, old_async_pid;
- char *istring;
- int result, fildes[2], function_value, pflags, rc, tflag;
- WORD_DESC *ret;
-
- istring = (char *)NULL;
-
- /* Don't fork () if there is no need to. In the case of no command to
- run, just return NULL. */
- if (!string || !*string || (string[0] == '\n' && !string[1]))
- return ((WORD_DESC *)NULL);
-
- if (wordexp_only && read_but_dont_execute)
- {
- last_command_exit_value = EX_WEXPCOMSUB;
- jump_to_top_level (EXITPROG);
- }
-
- /* We're making the assumption here that the command substitution will
- eventually run a command from the file system. Since we'll run
- maybe_make_export_env in this subshell before executing that command,
- the parent shell and any other shells it starts will have to remake
- the environment. If we make it before we fork, other shells won't
- have to. Don't bother if we have any temporary variable assignments,
- though, because the export environment will be remade after this
- command completes anyway, but do it if all the words to be expanded
- are variable assignments. */
- if (subst_assign_varlist == 0 || garglist == 0)
- maybe_make_export_env (); /* XXX */
-
- /* Flags to pass to parse_and_execute() */
- pflags = (interactive && sourcelevel == 0) ? SEVAL_RESETLINE : 0;
-
- /* Pipe the output of executing STRING into the current shell. */
- if (pipe (fildes) < 0)
- {
- sys_error (_("cannot make pipe for command substitution"));
- goto error_exit;
- }
-
- old_pid = last_made_pid;
-#if defined (JOB_CONTROL)
- old_pipeline_pgrp = pipeline_pgrp;
- /* Don't reset the pipeline pgrp if we're already a subshell in a pipeline. */
- if ((subshell_environment & SUBSHELL_PIPE) == 0)
- pipeline_pgrp = shell_pgrp;
- cleanup_the_pipeline ();
-#endif /* JOB_CONTROL */
-
- old_async_pid = last_asynchronous_pid;
- pid = make_child ((char *)NULL, subshell_environment&SUBSHELL_ASYNC);
- last_asynchronous_pid = old_async_pid;
-
- if (pid == 0)
- {
- /* Reset the signal handlers in the child, but don't free the
- trap strings. Set a flag noting that we have to free the
- trap strings if we run trap to change a signal disposition. */
- reset_signal_handlers ();
- subshell_environment |= SUBSHELL_RESETTRAP;
- }
-
-#if defined (JOB_CONTROL)
- /* XXX DO THIS ONLY IN PARENT ? XXX */
- set_sigchld_handler ();
- stop_making_children ();
- if (pid != 0)
- pipeline_pgrp = old_pipeline_pgrp;
-#else
- stop_making_children ();
-#endif /* JOB_CONTROL */
-
- if (pid < 0)
- {
- sys_error (_("cannot make child for command substitution"));
- error_exit:
-
- FREE (istring);
- close (fildes[0]);
- close (fildes[1]);
- return ((WORD_DESC *)NULL);
- }
-
- if (pid == 0)
- {
- set_sigint_handler (); /* XXX */
-
- free_pushed_string_input ();
-
- if (dup2 (fildes[1], 1) < 0)
- {
- sys_error (_("command_substitute: cannot duplicate pipe as fd 1"));
- exit (EXECUTION_FAILURE);
- }
-
- /* If standard output is closed in the parent shell
- (such as after `exec >&-'), file descriptor 1 will be
- the lowest available file descriptor, and end up in
- fildes[0]. This can happen for stdin and stderr as well,
- but stdout is more important -- it will cause no output
- to be generated from this command. */
- if ((fildes[1] != fileno (stdin)) &&
- (fildes[1] != fileno (stdout)) &&
- (fildes[1] != fileno (stderr)))
- close (fildes[1]);
-
- if ((fildes[0] != fileno (stdin)) &&
- (fildes[0] != fileno (stdout)) &&
- (fildes[0] != fileno (stderr)))
- close (fildes[0]);
-
-#ifdef __CYGWIN__
- /* Let stdio know the fd may have changed from text to binary mode, and
- make sure to preserve stdout line buffering. */
- freopen (NULL, "w", stdout);
- sh_setlinebuf (stdout);
-#endif /* __CYGWIN__ */
-
- /* The currently executing shell is not interactive. */
- interactive = 0;
-
- /* This is a subshell environment. */
- subshell_environment |= SUBSHELL_COMSUB;
-
- /* When not in POSIX mode, command substitution does not inherit
- the -e flag. */
- if (posixly_correct == 0)
- exit_immediately_on_error = 0;
-
- remove_quoted_escapes (string);
-
- startup_state = 2; /* see if we can avoid a fork */
- /* Give command substitution a place to jump back to on failure,
- so we don't go back up to main (). */
- result = setjmp (top_level);
-
- /* If we're running a command substitution inside a shell function,
- trap `return' so we don't return from the function in the subshell
- and go off to never-never land. */
- if (result == 0 && return_catch_flag)
- function_value = setjmp (return_catch);
- else
- function_value = 0;
-
- if (result == ERREXIT)
- rc = last_command_exit_value;
- else if (result == EXITPROG)
- rc = last_command_exit_value;
- else if (result)
- rc = EXECUTION_FAILURE;
- else if (function_value)
- rc = return_catch_value;
- else
- {
- subshell_level++;
- rc = parse_and_execute (string, "command substitution", pflags|SEVAL_NOHIST);
- subshell_level--;
- }
-
- last_command_exit_value = rc;
- rc = run_exit_trap ();
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif
- exit (rc);
- }
- else
- {
-#if defined (JOB_CONTROL) && defined (PGRP_PIPE)
- close_pgrp_pipe ();
-#endif /* JOB_CONTROL && PGRP_PIPE */
-
- close (fildes[1]);
-
- tflag = 0;
- istring = read_comsub (fildes[0], quoted, &tflag);
-
- close (fildes[0]);
-
- current_command_subst_pid = pid;
- last_command_exit_value = wait_for (pid);
- last_command_subst_pid = pid;
- last_made_pid = old_pid;
-
-#if defined (JOB_CONTROL)
- /* If last_command_exit_value > 128, then the substituted command
- was terminated by a signal. If that signal was SIGINT, then send
- SIGINT to ourselves. This will break out of loops, for instance. */
- if (last_command_exit_value == (128 + SIGINT) && last_command_exit_signal == SIGINT)
- kill (getpid (), SIGINT);
-
- /* wait_for gives the terminal back to shell_pgrp. If some other
- process group should have it, give it away to that group here.
- pipeline_pgrp is non-zero only while we are constructing a
- pipline, so what we are concerned about is whether or not that
- pipeline was started in the background. A pipeline started in
- the background should never get the tty back here. */
- if (interactive && pipeline_pgrp != (pid_t)0 && (subshell_environment & SUBSHELL_ASYNC) == 0)
- give_terminal_to (pipeline_pgrp, 0);
-#endif /* JOB_CONTROL */
-
- ret = alloc_word_desc ();
- ret->word = istring;
- ret->flags = tflag;
-
- return ret;
- }
-}
-
-/********************************************************
- * *
- * Utility functions for parameter expansion *
- * *
- ********************************************************/
-
-#if defined (ARRAY_VARS)
-
-static arrayind_t
-array_length_reference (s)
- char *s;
-{
- int len;
- arrayind_t ind;
- char *akey;
- char *t, c;
- ARRAY *array;
- HASH_TABLE *h;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* If unbound variables should generate an error, report one and return
- failure. */
- if ((var == 0 || (assoc_p (var) == 0 && array_p (var) == 0)) && unbound_vars_is_error)
- {
- c = *--t;
- *t = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (s);
- *t = c;
- return (-1);
- }
- else if (var == 0)
- return 0;
-
- /* We support a couple of expansions for variables that are not arrays.
- We'll return the length of the value for v[0], and 1 for v[@] or
- v[*]. Return 0 for everything else. */
-
- array = array_p (var) ? array_cell (var) : (ARRAY *)NULL;
- h = assoc_p (var) ? assoc_cell (var) : (HASH_TABLE *)NULL;
-
- if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']')
- {
- if (assoc_p (var))
- return (h ? assoc_num_elements (h) : 0);
- else if (array_p (var))
- return (array ? array_num_elements (array) : 0);
- else
- return (var_isset (var) ? 1 : 0);
- }
-
- if (assoc_p (var))
- {
- t[len - 1] = '\0';
- akey = expand_assignment_string_to_string (t, 0); /* [ */
- t[len - 1] = ']';
- if (akey == 0 || *akey == 0)
- {
- err_badarraysub (t);
- return (-1);
- }
- t = assoc_reference (assoc_cell (var), akey);
- }
- else
- {
- ind = array_expand_index (t, len);
- if (ind < 0)
- {
- err_badarraysub (t);
- return (-1);
- }
- if (array_p (var))
- t = array_reference (array, ind);
- else
- t = (ind == 0) ? value_cell (var) : (char *)NULL;
- }
-
- len = MB_STRLEN (t);
- return (len);
-}
-#endif /* ARRAY_VARS */
-
-static int
-valid_brace_expansion_word (name, var_is_special)
- char *name;
- int var_is_special;
-{
- if (DIGIT (*name) && all_digits (name))
- return 1;
- else if (var_is_special)
- return 1;
-#if defined (ARRAY_VARS)
- else if (valid_array_reference (name))
- return 1;
-#endif /* ARRAY_VARS */
- else if (legal_identifier (name))
- return 1;
- else
- return 0;
-}
-
-static int
-chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at)
- char *name;
- int quoted;
- int *quoted_dollar_atp, *contains_dollar_at;
-{
- char *temp1;
-
- if (name == 0)
- {
- if (quoted_dollar_atp)
- *quoted_dollar_atp = 0;
- if (contains_dollar_at)
- *contains_dollar_at = 0;
- return 0;
- }
-
- /* check for $@ and $* */
- if (name[0] == '@' && name[1] == 0)
- {
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- return 1;
- }
- else if (name[0] == '*' && name[1] == '\0' && quoted == 0)
- {
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- return 1;
- }
-
- /* Now check for ${array[@]} and ${array[*]} */
-#if defined (ARRAY_VARS)
- else if (valid_array_reference (name))
- {
- temp1 = mbschr (name, '[');
- if (temp1 && temp1[1] == '@' && temp1[2] == ']')
- {
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- return 1;
- } /* [ */
- /* ${array[*]}, when unquoted, should be treated like ${array[@]},
- which should result in separate words even when IFS is unset. */
- if (temp1 && temp1[1] == '*' && temp1[2] == ']' && quoted == 0)
- {
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- return 1;
- }
- }
-#endif
- return 0;
-}
-
-/* Parameter expand NAME, and return a new string which is the expansion,
- or NULL if there was no expansion.
- VAR_IS_SPECIAL is non-zero if NAME is one of the special variables in
- the shell, e.g., "@", "$", "*", etc. QUOTED, if non-zero, means that
- NAME was found inside of a double-quoted expression. */
-static WORD_DESC *
-parameter_brace_expand_word (name, var_is_special, quoted, pflags, indp)
- char *name;
- int var_is_special, quoted, pflags;
- arrayind_t *indp;
-{
- WORD_DESC *ret;
- char *temp, *tt;
- intmax_t arg_index;
- SHELL_VAR *var;
- int atype, rflags;
- arrayind_t ind;
-
- ret = 0;
- temp = 0;
- rflags = 0;
-
- if (indp)
- *indp = INTMAX_MIN;
-
- /* Handle multiple digit arguments, as in ${11}. */
- if (legal_number (name, &arg_index))
- {
- tt = get_dollar_var_value (arg_index);
- if (tt)
- temp = (*tt && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- ? quote_string (tt)
- : quote_escapes (tt);
- else
- temp = (char *)NULL;
- FREE (tt);
- }
- else if (var_is_special) /* ${@} */
- {
- int sindex;
- tt = (char *)xmalloc (2 + strlen (name));
- tt[sindex = 0] = '$';
- strcpy (tt + 1, name);
-
- ret = param_expand (tt, &sindex, quoted, (int *)NULL, (int *)NULL,
- (int *)NULL, (int *)NULL, pflags);
- free (tt);
- }
-#if defined (ARRAY_VARS)
- else if (valid_array_reference (name))
- {
- temp = array_value (name, quoted, 0, &atype, &ind);
- if (atype == 0 && temp)
- {
- temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- ? quote_string (temp)
- : quote_escapes (temp);
- rflags |= W_ARRAYIND;
- if (indp)
- *indp = ind;
- }
- else if (atype == 1 && temp && QUOTED_NULL (temp) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- rflags |= W_HASQUOTEDNULL;
- }
-#endif
- else if (var = find_variable (name))
- {
- if (var_isset (var) && invisible_p (var) == 0)
- {
-#if defined (ARRAY_VARS)
- if (assoc_p (var))
- temp = assoc_reference (assoc_cell (var), "0");
- else if (array_p (var))
- temp = array_reference (array_cell (var), 0);
- else
- temp = value_cell (var);
-#else
- temp = value_cell (var);
-#endif
-
- if (temp)
- temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- ? quote_string (temp)
- : quote_escapes (temp);
- }
- else
- temp = (char *)NULL;
- }
- else
- temp = (char *)NULL;
-
- if (ret == 0)
- {
- ret = alloc_word_desc ();
- ret->word = temp;
- ret->flags |= rflags;
- }
- return ret;
-}
-
-/* Expand an indirect reference to a variable: ${!NAME} expands to the
- value of the variable whose name is the value of NAME. */
-static WORD_DESC *
-parameter_brace_expand_indir (name, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at)
- char *name;
- int var_is_special, quoted;
- int *quoted_dollar_atp, *contains_dollar_at;
-{
- char *temp, *t;
- WORD_DESC *w;
-
- w = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND, 0);
- t = w->word;
- /* Have to dequote here if necessary */
- if (t)
- {
- temp = (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- ? dequote_string (t)
- : dequote_escapes (t);
- free (t);
- t = temp;
- }
- dispose_word_desc (w);
-
- chk_atstar (t, quoted, quoted_dollar_atp, contains_dollar_at);
- if (t == 0)
- return (WORD_DESC *)NULL;
-
- w = parameter_brace_expand_word (t, SPECIAL_VAR(t, 0), quoted, 0, 0);
- free (t);
-
- return w;
-}
-
-/* Expand the right side of a parameter expansion of the form ${NAMEcVALUE},
- depending on the value of C, the separating character. C can be one of
- "-", "+", or "=". QUOTED is true if the entire brace expression occurs
- between double quotes. */
-static WORD_DESC *
-parameter_brace_expand_rhs (name, value, c, quoted, qdollaratp, hasdollarat)
- char *name, *value;
- int c, quoted, *qdollaratp, *hasdollarat;
-{
- WORD_DESC *w;
- WORD_LIST *l;
- char *t, *t1, *temp;
- int hasdol;
-
- /* If the entire expression is between double quotes, we want to treat
- the value as a double-quoted string, with the exception that we strip
- embedded unescaped double quotes (for sh backwards compatibility). */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *value)
- {
- hasdol = 0;
- temp = string_extract_double_quoted (value, &hasdol, 1);
- }
- else
- temp = value;
-
- w = alloc_word_desc ();
- hasdol = 0;
- /* XXX was 0 not quoted */
- l = *temp ? expand_string_for_rhs (temp, quoted, &hasdol, (int *)NULL)
- : (WORD_LIST *)0;
- if (hasdollarat)
- *hasdollarat = hasdol || (l && l->next);
- if (temp != value)
- free (temp);
- if (l)
- {
- /* The expansion of TEMP returned something. We need to treat things
- slightly differently if HASDOL is non-zero. If we have "$@", the
- individual words have already been quoted. We need to turn them
- into a string with the words separated by the first character of
- $IFS without any additional quoting, so string_list_dollar_at won't
- do the right thing. We use string_list_dollar_star instead. */
- temp = (hasdol || l->next) ? string_list_dollar_star (l) : string_list (l);
-
- /* If l->next is not null, we know that TEMP contained "$@", since that
- is the only expansion that creates more than one word. */
- if (qdollaratp && ((hasdol && quoted) || l->next))
- *qdollaratp = 1;
- dispose_words (l);
- }
- else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && hasdol)
- {
- /* The brace expansion occurred between double quotes and there was
- a $@ in TEMP. It does not matter if the $@ is quoted, as long as
- it does not expand to anything. In this case, we want to return
- a quoted empty string. */
- temp = make_quoted_char ('\0');
- w->flags |= W_HASQUOTEDNULL;
- }
- else
- temp = (char *)NULL;
-
- if (c == '-' || c == '+')
- {
- w->word = temp;
- return w;
- }
-
- /* c == '=' */
- t = temp ? savestring (temp) : savestring ("");
- t1 = dequote_string (t);
- free (t);
-#if defined (ARRAY_VARS)
- if (valid_array_reference (name))
- assign_array_element (name, t1, 0);
- else
-#endif /* ARRAY_VARS */
- bind_variable (name, t1, 0);
-
- /* From Posix group discussion Feb-March 2010. Issue 7 0000221 */
- free (temp);
-
- w->word = t1;
- return w;
-}
-
-/* Deal with the right hand side of a ${name:?value} expansion in the case
- that NAME is null or not set. If VALUE is non-null it is expanded and
- used as the error message to print, otherwise a standard message is
- printed. */
-static void
-parameter_brace_expand_error (name, value)
- char *name, *value;
-{
- WORD_LIST *l;
- char *temp;
-
- if (value && *value)
- {
- l = expand_string (value, 0);
- temp = string_list (l);
- report_error ("%s: %s", name, temp ? temp : ""); /* XXX was value not "" */
- FREE (temp);
- dispose_words (l);
- }
- else
- report_error (_("%s: parameter null or not set"), name);
-
- /* Free the data we have allocated during this expansion, since we
- are about to longjmp out. */
- free (name);
- FREE (value);
-}
-
-/* Return 1 if NAME is something for which parameter_brace_expand_length is
- OK to do. */
-static int
-valid_length_expression (name)
- char *name;
-{
- return (name[1] == '\0' || /* ${#} */
- ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0') || /* special param */
- (DIGIT (name[1]) && all_digits (name + 1)) || /* ${#11} */
-#if defined (ARRAY_VARS)
- valid_array_reference (name + 1) || /* ${#a[7]} */
-#endif
- legal_identifier (name + 1)); /* ${#PS1} */
-}
-
-/* Handle the parameter brace expansion that requires us to return the
- length of a parameter. */
-static intmax_t
-parameter_brace_expand_length (name)
- char *name;
-{
- char *t, *newname;
- intmax_t number, arg_index;
- WORD_LIST *list;
-#if defined (ARRAY_VARS)
- SHELL_VAR *var;
-#endif
-
- if (name[1] == '\0') /* ${#} */
- number = number_of_args ();
- else if ((name[1] == '@' || name[1] == '*') && name[2] == '\0') /* ${#@}, ${#*} */
- number = number_of_args ();
- else if ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0')
- {
- /* Take the lengths of some of the shell's special parameters. */
- switch (name[1])
- {
- case '-':
- t = which_set_flags ();
- break;
- case '?':
- t = itos (last_command_exit_value);
- break;
- case '$':
- t = itos (dollar_dollar_pid);
- break;
- case '!':
- if (last_asynchronous_pid == NO_PID)
- t = (char *)NULL; /* XXX - error if set -u set? */
- else
- t = itos (last_asynchronous_pid);
- break;
- case '#':
- t = itos (number_of_args ());
- break;
- }
- number = STRLEN (t);
- FREE (t);
- }
-#if defined (ARRAY_VARS)
- else if (valid_array_reference (name + 1))
- number = array_length_reference (name + 1);
-#endif /* ARRAY_VARS */
- else
- {
- number = 0;
-
- if (legal_number (name + 1, &arg_index)) /* ${#1} */
- {
- t = get_dollar_var_value (arg_index);
- if (t == 0 && unbound_vars_is_error)
- return INTMAX_MIN;
- number = MB_STRLEN (t);
- FREE (t);
- }
-#if defined (ARRAY_VARS)
- else if ((var = find_variable (name + 1)) && (invisible_p (var) == 0) && (array_p (var) || assoc_p (var)))
- {
- if (assoc_p (var))
- t = assoc_reference (assoc_cell (var), "0");
- else
- t = array_reference (array_cell (var), 0);
- if (t == 0 && unbound_vars_is_error)
- return INTMAX_MIN;
- number = MB_STRLEN (t);
- }
-#endif
- else /* ${#PS1} */
- {
- newname = savestring (name);
- newname[0] = '$';
- list = expand_string (newname, Q_DOUBLE_QUOTES);
- t = list ? string_list (list) : (char *)NULL;
- free (newname);
- if (list)
- dispose_words (list);
-
- number = t ? MB_STRLEN (t) : 0;
- FREE (t);
- }
- }
-
- return (number);
-}
-
-/* Skip characters in SUBSTR until DELIM. SUBSTR is an arithmetic expression,
- so we do some ad-hoc parsing of an arithmetic expression to find
- the first DELIM, instead of using strchr(3). Two rules:
- 1. If the substring contains a `(', read until closing `)'.
- 2. If the substring contains a `?', read past one `:' for each `?'.
-*/
-
-static char *
-skiparith (substr, delim)
- char *substr;
- int delim;
-{
- size_t sublen;
- int skipcol, pcount, i;
- DECLARE_MBSTATE;
-
- sublen = strlen (substr);
- i = skipcol = pcount = 0;
- while (substr[i])
- {
- /* Balance parens */
- if (substr[i] == LPAREN)
- {
- pcount++;
- i++;
- continue;
- }
- if (substr[i] == RPAREN && pcount)
- {
- pcount--;
- i++;
- continue;
- }
- if (pcount)
- {
- ADVANCE_CHAR (substr, sublen, i);
- continue;
- }
-
- /* Skip one `:' for each `?' */
- if (substr[i] == ':' && skipcol)
- {
- skipcol--;
- i++;
- continue;
- }
- if (substr[i] == delim)
- break;
- if (substr[i] == '?')
- {
- skipcol++;
- i++;
- continue;
- }
- ADVANCE_CHAR (substr, sublen, i);
- }
-
- return (substr + i);
-}
-
-/* Verify and limit the start and end of the desired substring. If
- VTYPE == 0, a regular shell variable is being used; if it is 1,
- then the positional parameters are being used; if it is 2, then
- VALUE is really a pointer to an array variable that should be used.
- Return value is 1 if both values were OK, 0 if there was a problem
- with an invalid expression, or -1 if the values were out of range. */
-static int
-verify_substring_values (v, value, substr, vtype, e1p, e2p)
- SHELL_VAR *v;
- char *value, *substr;
- int vtype;
- intmax_t *e1p, *e2p;
-{
- char *t, *temp1, *temp2;
- arrayind_t len;
- int expok;
-#if defined (ARRAY_VARS)
- ARRAY *a;
- HASH_TABLE *h;
-#endif
-
- /* duplicate behavior of strchr(3) */
- t = skiparith (substr, ':');
- if (*t && *t == ':')
- *t = '\0';
- else
- t = (char *)0;
-
- temp1 = expand_arith_string (substr, Q_DOUBLE_QUOTES);
- *e1p = evalexp (temp1, &expok);
- free (temp1);
- if (expok == 0)
- return (0);
-
- len = -1; /* paranoia */
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
- len = MB_STRLEN (value);
- break;
- case VT_POSPARMS:
- len = number_of_args () + 1;
- if (*e1p == 0)
- len++; /* add one arg if counting from $0 */
- break;
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- /* For arrays, the first value deals with array indices. Negative
- offsets count from one past the array's maximum index. Associative
- arrays treat the number of elements as the maximum index. */
- if (assoc_p (v))
- {
- h = assoc_cell (v);
- len = assoc_num_elements (h) + (*e1p < 0);
- }
- else
- {
- a = (ARRAY *)value;
- len = array_max_index (a) + (*e1p < 0); /* arrays index from 0 to n - 1 */
- }
- break;
-#endif
- }
-
- if (len == -1) /* paranoia */
- return -1;
-
- if (*e1p < 0) /* negative offsets count from end */
- *e1p += len;
-
- if (*e1p > len || *e1p < 0)
- return (-1);
-
-#if defined (ARRAY_VARS)
- /* For arrays, the second offset deals with the number of elements. */
- if (vtype == VT_ARRAYVAR)
- len = assoc_p (v) ? assoc_num_elements (h) : array_num_elements (a);
-#endif
-
- if (t)
- {
- t++;
- temp2 = savestring (t);
- temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES);
- free (temp2);
- t[-1] = ':';
- *e2p = evalexp (temp1, &expok);
- free (temp1);
- if (expok == 0)
- return (0);
- if ((vtype == VT_ARRAYVAR || vtype == VT_POSPARMS) && *e2p < 0)
- {
- internal_error (_("%s: substring expression < 0"), t);
- return (0);
- }
-#if defined (ARRAY_VARS)
- /* In order to deal with sparse arrays, push the intelligence about how
- to deal with the number of elements desired down to the array-
- specific functions. */
- if (vtype != VT_ARRAYVAR)
-#endif
- {
- if (*e2p < 0)
- {
- *e2p += len;
- if (*e2p < 0 || *e2p < *e1p)
- {
- internal_error (_("%s: substring expression < 0"), t);
- return (0);
- }
- }
- else
- *e2p += *e1p; /* want E2 chars starting at E1 */
- if (*e2p > len)
- *e2p = len;
- }
- }
- else
- *e2p = len;
-
- return (1);
-}
-
-/* Return the type of variable specified by VARNAME (simple variable,
- positional param, or array variable). Also return the value specified
- by VARNAME (value of a variable or a reference to an array element).
- QUOTED is the standard description of quoting state, using Q_* defines.
- FLAGS is currently a set of flags to pass to array_value. If IND is
- non-null and not INTMAX_MIN, and FLAGS includes AV_USEIND, IND is
- passed to array_value so the array index is not computed again.
- If this returns VT_VARIABLE, the caller assumes that CTLESC and CTLNUL
- characters in the value are quoted with CTLESC and takes appropriate
- steps. For convenience, *VALP is set to the dequoted VALUE. */
-static int
-get_var_and_type (varname, value, ind, quoted, flags, varp, valp)
- char *varname, *value;
- arrayind_t ind;
- int quoted, flags;
- SHELL_VAR **varp;
- char **valp;
-{
- int vtype;
- char *temp;
-#if defined (ARRAY_VARS)
- SHELL_VAR *v;
-#endif
- arrayind_t lind;
-
- /* This sets vtype to VT_VARIABLE or VT_POSPARMS */
- vtype = (varname[0] == '@' || varname[0] == '*') && varname[1] == '\0';
- if (vtype == VT_POSPARMS && varname[0] == '*')
- vtype |= VT_STARSUB;
- *varp = (SHELL_VAR *)NULL;
-
-#if defined (ARRAY_VARS)
- if (valid_array_reference (varname))
- {
- v = array_variable_part (varname, &temp, (int *)0);
- /* If we want to signal array_value to use an already-computed index,
- set LIND to that index */
- lind = (ind != INTMAX_MIN && (flags & AV_USEIND)) ? ind : 0;
- if (v && (array_p (v) || assoc_p (v)))
- { /* [ */
- if (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']')
- {
- /* Callers have to differentiate betwen indexed and associative */
- vtype = VT_ARRAYVAR;
- if (temp[0] == '*')
- vtype |= VT_STARSUB;
- *valp = array_p (v) ? (char *)array_cell (v) : (char *)assoc_cell (v);
- }
- else
- {
- vtype = VT_ARRAYMEMBER;
- *valp = array_value (varname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind);
- }
- *varp = v;
- }
- else if (v && (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']'))
- {
- vtype = VT_VARIABLE;
- *varp = v;
- if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- *valp = dequote_string (value);
- else
- *valp = dequote_escapes (value);
- }
- else
- {
- vtype = VT_ARRAYMEMBER;
- *varp = v;
- *valp = array_value (varname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind);
- }
- }
- else if ((v = find_variable (varname)) && (invisible_p (v) == 0) && (assoc_p (v) || array_p (v)))
- {
- vtype = VT_ARRAYMEMBER;
- *varp = v;
- *valp = assoc_p (v) ? assoc_reference (assoc_cell (v), "0") : array_reference (array_cell (v), 0);
- }
- else
-#endif
- {
- if (value && vtype == VT_VARIABLE)
- {
- if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- *valp = dequote_string (value);
- else
- *valp = dequote_escapes (value);
- }
- else
- *valp = value;
- }
-
- return vtype;
-}
-
-/******************************************************/
-/* */
-/* Functions to extract substrings of variable values */
-/* */
-/******************************************************/
-
-#if defined (HANDLE_MULTIBYTE)
-/* Character-oriented rather than strictly byte-oriented substrings. S and
- E, rather being strict indices into STRING, indicate character (possibly
- multibyte character) positions that require calculation.
- Used by the ${param:offset[:length]} expansion. */
-static char *
-mb_substring (string, s, e)
- char *string;
- int s, e;
-{
- char *tt;
- int start, stop, i, slen;
- DECLARE_MBSTATE;
-
- start = 0;
- /* Don't need string length in ADVANCE_CHAR unless multibyte chars possible. */
- slen = (MB_CUR_MAX > 1) ? STRLEN (string) : 0;
-
- i = s;
- while (string[start] && i--)
- ADVANCE_CHAR (string, slen, start);
- stop = start;
- i = e - s;
- while (string[stop] && i--)
- ADVANCE_CHAR (string, slen, stop);
- tt = substring (string, start, stop);
- return tt;
-}
-#endif
-
-/* Process a variable substring expansion: ${name:e1[:e2]}. If VARNAME
- is `@', use the positional parameters; otherwise, use the value of
- VARNAME. If VARNAME is an array variable, use the array elements. */
-
-static char *
-parameter_brace_substring (varname, value, ind, substr, quoted, flags)
- char *varname, *value;
- int ind;
- char *substr;
- int quoted, flags;
-{
- intmax_t e1, e2;
- int vtype, r, starsub;
- char *temp, *val, *tt, *oname;
- SHELL_VAR *v;
-
- if (value == 0)
- return ((char *)NULL);
-
- oname = this_command_name;
- this_command_name = varname;
-
- vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val);
- if (vtype == -1)
- {
- this_command_name = oname;
- return ((char *)NULL);
- }
-
- starsub = vtype & VT_STARSUB;
- vtype &= ~VT_STARSUB;
-
- r = verify_substring_values (v, val, substr, vtype, &e1, &e2);
- this_command_name = oname;
- if (r <= 0)
- return ((r == 0) ? &expand_param_error : (char *)NULL);
-
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1)
- tt = mb_substring (val, e1, e2);
- else
-#endif
- tt = substring (val, e1, e2);
-
- if (vtype == VT_VARIABLE)
- FREE (val);
- if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- temp = quote_string (tt);
- else
- temp = tt ? quote_escapes (tt) : (char *)NULL;
- FREE (tt);
- break;
- case VT_POSPARMS:
- tt = pos_params (varname, e1, e2, quoted);
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0)
- {
- temp = tt ? quote_escapes (tt) : (char *)NULL;
- FREE (tt);
- }
- else
- temp = tt;
- break;
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- if (assoc_p (v))
- /* we convert to list and take first e2 elements starting at e1th
- element -- officially undefined for now */
- temp = assoc_subrange (assoc_cell (v), e1, e2, starsub, quoted);
- else
- /* We want E2 to be the number of elements desired (arrays can be sparse,
- so verify_substring_values just returns the numbers specified and we
- rely on array_subrange to understand how to deal with them). */
- temp = array_subrange (array_cell (v), e1, e2, starsub, quoted);
- /* array_subrange now calls array_quote_escapes as appropriate, so the
- caller no longer needs to. */
- break;
-#endif
- default:
- temp = (char *)NULL;
- }
-
- return temp;
-}
-
-/****************************************************************/
-/* */
-/* Functions to perform pattern substitution on variable values */
-/* */
-/****************************************************************/
-
-static int
-shouldexp_replacement (s)
- char *s;
-{
- register char *p;
-
- for (p = s; p && *p; p++)
- {
- if (*p == '\\')
- p++;
- else if (*p == '&')
- return 1;
- }
- return 0;
-}
-
-char *
-pat_subst (string, pat, rep, mflags)
- char *string, *pat, *rep;
- int mflags;
-{
- char *ret, *s, *e, *str, *rstr, *mstr;
- int rsize, rptr, l, replen, mtype, rxpand, rslen, mlen;
-
- if (string == 0)
- return (savestring (""));
-
- mtype = mflags & MATCH_TYPEMASK;
-
-#if 0 /* bash-4.2 ? */
- rxpand = (rep && *rep) ? shouldexp_replacement (rep) : 0;
-#else
- rxpand = 0;
-#endif
-
- /* Special cases:
- * 1. A null pattern with mtype == MATCH_BEG means to prefix STRING
- * with REP and return the result.
- * 2. A null pattern with mtype == MATCH_END means to append REP to
- * STRING and return the result.
- * These don't understand or process `&' in the replacement string.
- */
- if ((pat == 0 || *pat == 0) && (mtype == MATCH_BEG || mtype == MATCH_END))
- {
- replen = STRLEN (rep);
- l = STRLEN (string);
- ret = (char *)xmalloc (replen + l + 2);
- if (replen == 0)
- strcpy (ret, string);
- else if (mtype == MATCH_BEG)
- {
- strcpy (ret, rep);
- strcpy (ret + replen, string);
- }
- else
- {
- strcpy (ret, string);
- strcpy (ret + l, rep);
- }
- return (ret);
- }
-
- ret = (char *)xmalloc (rsize = 64);
- ret[0] = '\0';
-
- for (replen = STRLEN (rep), rptr = 0, str = string;;)
- {
- if (match_pattern (str, pat, mtype, &s, &e) == 0)
- break;
- l = s - str;
-
- if (rxpand)
- {
- int x;
- mlen = e - s;
- mstr = xmalloc (mlen + 1);
- for (x = 0; x < mlen; x++)
- mstr[x] = s[x];
- mstr[mlen] = '\0';
- rstr = strcreplace (rep, '&', mstr, 0);
- rslen = strlen (rstr);
- }
- else
- {
- rstr = rep;
- rslen = replen;
- }
-
- RESIZE_MALLOCED_BUFFER (ret, rptr, (l + rslen), rsize, 64);
-
- /* OK, now copy the leading unmatched portion of the string (from
- str to s) to ret starting at rptr (the current offset). Then copy
- the replacement string at ret + rptr + (s - str). Increment
- rptr (if necessary) and str and go on. */
- if (l)
- {
- strncpy (ret + rptr, str, l);
- rptr += l;
- }
- if (replen)
- {
- strncpy (ret + rptr, rstr, rslen);
- rptr += rslen;
- }
- str = e; /* e == end of match */
-
- if (rstr != rep)
- free (rstr);
-
- if (((mflags & MATCH_GLOBREP) == 0) || mtype != MATCH_ANY)
- break;
-
- if (s == e)
- {
- /* On a zero-length match, make sure we copy one character, since
- we increment one character to avoid infinite recursion. */
- RESIZE_MALLOCED_BUFFER (ret, rptr, 1, rsize, 64);
- ret[rptr++] = *str++;
- e++; /* avoid infinite recursion on zero-length match */
- }
- }
-
- /* Now copy the unmatched portion of the input string */
- if (str && *str)
- {
- RESIZE_MALLOCED_BUFFER (ret, rptr, STRLEN(str) + 1, rsize, 64);
- strcpy (ret + rptr, str);
- }
- else
- ret[rptr] = '\0';
-
- return ret;
-}
-
-/* Do pattern match and replacement on the positional parameters. */
-static char *
-pos_params_pat_subst (string, pat, rep, mflags)
- char *string, *pat, *rep;
- int mflags;
-{
- WORD_LIST *save, *params;
- WORD_DESC *w;
- char *ret;
- int pchar, qflags;
-
- save = params = list_rest_of_args ();
- if (save == 0)
- return ((char *)NULL);
-
- for ( ; params; params = params->next)
- {
- ret = pat_subst (params->word->word, pat, rep, mflags);
- w = alloc_word_desc ();
- w->word = ret ? ret : savestring ("");
- dispose_word (params->word);
- params->word = w;
- }
-
- pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@';
- qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0;
-
-#if 0
- if ((mflags & (MATCH_QUOTED|MATCH_STARSUB)) == (MATCH_QUOTED|MATCH_STARSUB))
- ret = string_list_dollar_star (quote_list (save));
- else if ((mflags & MATCH_STARSUB) == MATCH_STARSUB)
- ret = string_list_dollar_star (save);
- else if ((mflags & MATCH_QUOTED) == MATCH_QUOTED)
- ret = string_list_dollar_at (save, qflags);
- else
- ret = string_list_dollar_star (save);
-#else
- ret = string_list_pos_params (pchar, save, qflags);
-#endif
-
- dispose_words (save);
-
- return (ret);
-}
-
-/* Perform pattern substitution on VALUE, which is the expansion of
- VARNAME. PATSUB is an expression supplying the pattern to match
- and the string to substitute. QUOTED is a flags word containing
- the type of quoting currently in effect. */
-static char *
-parameter_brace_patsub (varname, value, ind, patsub, quoted, flags)
- char *varname, *value;
- int ind;
- char *patsub;
- int quoted, flags;
-{
- int vtype, mflags, starsub, delim;
- char *val, *temp, *pat, *rep, *p, *lpatsub, *tt;
- SHELL_VAR *v;
-
- if (value == 0)
- return ((char *)NULL);
-
- this_command_name = varname;
-
- vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val);
- if (vtype == -1)
- return ((char *)NULL);
-
- starsub = vtype & VT_STARSUB;
- vtype &= ~VT_STARSUB;
-
- mflags = 0;
- if (patsub && *patsub == '/')
- {
- mflags |= MATCH_GLOBREP;
- patsub++;
- }
-
- /* Malloc this because expand_string_if_necessary or one of the expansion
- functions in its call chain may free it on a substitution error. */
- lpatsub = savestring (patsub);
-
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- mflags |= MATCH_QUOTED;
-
- if (starsub)
- mflags |= MATCH_STARSUB;
-
- /* If the pattern starts with a `/', make sure we skip over it when looking
- for the replacement delimiter. */
-#if 0
- if (rep = quoted_strchr ((*patsub == '/') ? lpatsub+1 : lpatsub, '/', ST_BACKSL))
- *rep++ = '\0';
- else
- rep = (char *)NULL;
-#else
- delim = skip_to_delim (lpatsub, ((*patsub == '/') ? 1 : 0), "/", 0);
- if (lpatsub[delim] == '/')
- {
- lpatsub[delim] = 0;
- rep = lpatsub + delim + 1;
- }
- else
- rep = (char *)NULL;
-#endif
-
- if (rep && *rep == '\0')
- rep = (char *)NULL;
-
- /* Perform the same expansions on the pattern as performed by the
- pattern removal expansions. */
- pat = getpattern (lpatsub, quoted, 1);
-
- if (rep)
- {
- if ((mflags & MATCH_QUOTED) == 0)
- rep = expand_string_if_necessary (rep, quoted, expand_string_unsplit);
- else
- rep = expand_string_to_string_internal (rep, quoted, expand_string_unsplit);
- }
-
- /* ksh93 doesn't allow the match specifier to be a part of the expanded
- pattern. This is an extension. Make sure we don't anchor the pattern
- at the beginning or end of the string if we're doing global replacement,
- though. */
- p = pat;
- if (mflags & MATCH_GLOBREP)
- mflags |= MATCH_ANY;
- else if (pat && pat[0] == '#')
- {
- mflags |= MATCH_BEG;
- p++;
- }
- else if (pat && pat[0] == '%')
- {
- mflags |= MATCH_END;
- p++;
- }
- else
- mflags |= MATCH_ANY;
-
- /* OK, we now want to substitute REP for PAT in VAL. If
- flags & MATCH_GLOBREP is non-zero, the substitution is done
- everywhere, otherwise only the first occurrence of PAT is
- replaced. The pattern matching code doesn't understand
- CTLESC quoting CTLESC and CTLNUL so we use the dequoted variable
- values passed in (VT_VARIABLE) so the pattern substitution
- code works right. We need to requote special chars after
- we're done for VT_VARIABLE and VT_ARRAYMEMBER, and for the
- other cases if QUOTED == 0, since the posparams and arrays
- indexed by * or @ do special things when QUOTED != 0. */
-
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
- temp = pat_subst (val, p, rep, mflags);
- if (vtype == VT_VARIABLE)
- FREE (val);
- if (temp)
- {
- tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp);
- free (temp);
- temp = tt;
- }
- break;
- case VT_POSPARMS:
- temp = pos_params_pat_subst (val, p, rep, mflags);
- if (temp && (mflags & MATCH_QUOTED) == 0)
- {
- tt = quote_escapes (temp);
- free (temp);
- temp = tt;
- }
- break;
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- temp = assoc_p (v) ? assoc_patsub (assoc_cell (v), p, rep, mflags)
- : array_patsub (array_cell (v), p, rep, mflags);
- /* Don't call quote_escapes anymore; array_patsub calls
- array_quote_escapes as appropriate before adding the
- space separators; ditto for assoc_patsub. */
- break;
-#endif
- }
-
- FREE (pat);
- FREE (rep);
- free (lpatsub);
-
- return temp;
-}
-
-/****************************************************************/
-/* */
-/* Functions to perform case modification on variable values */
-/* */
-/****************************************************************/
-
-/* Do case modification on the positional parameters. */
-
-static char *
-pos_params_modcase (string, pat, modop, mflags)
- char *string, *pat;
- int modop;
- int mflags;
-{
- WORD_LIST *save, *params;
- WORD_DESC *w;
- char *ret;
- int pchar, qflags;
-
- save = params = list_rest_of_args ();
- if (save == 0)
- return ((char *)NULL);
-
- for ( ; params; params = params->next)
- {
- ret = sh_modcase (params->word->word, pat, modop);
- w = alloc_word_desc ();
- w->word = ret ? ret : savestring ("");
- dispose_word (params->word);
- params->word = w;
- }
-
- pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@';
- qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0;
-
- ret = string_list_pos_params (pchar, save, qflags);
- dispose_words (save);
-
- return (ret);
-}
-
-/* Perform case modification on VALUE, which is the expansion of
- VARNAME. MODSPEC is an expression supplying the type of modification
- to perform. QUOTED is a flags word containing the type of quoting
- currently in effect. */
-static char *
-parameter_brace_casemod (varname, value, ind, modspec, patspec, quoted, flags)
- char *varname, *value;
- int ind, modspec;
- char *patspec;
- int quoted, flags;
-{
- int vtype, starsub, modop, mflags, x;
- char *val, *temp, *pat, *p, *lpat, *tt;
- SHELL_VAR *v;
-
- if (value == 0)
- return ((char *)NULL);
-
- this_command_name = varname;
-
- vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val);
- if (vtype == -1)
- return ((char *)NULL);
-
- starsub = vtype & VT_STARSUB;
- vtype &= ~VT_STARSUB;
-
- modop = 0;
- mflags = 0;
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- mflags |= MATCH_QUOTED;
- if (starsub)
- mflags |= MATCH_STARSUB;
-
- p = patspec;
- if (modspec == '^')
- {
- x = p && p[0] == modspec;
- modop = x ? CASE_UPPER : CASE_UPFIRST;
- p += x;
- }
- else if (modspec == ',')
- {
- x = p && p[0] == modspec;
- modop = x ? CASE_LOWER : CASE_LOWFIRST;
- p += x;
- }
- else if (modspec == '~')
- {
- x = p && p[0] == modspec;
- modop = x ? CASE_TOGGLEALL : CASE_TOGGLE;
- p += x;
- }
-
- lpat = p ? savestring (p) : 0;
- /* Perform the same expansions on the pattern as performed by the
- pattern removal expansions. FOR LATER */
- pat = lpat ? getpattern (lpat, quoted, 1) : 0;
-
- /* OK, now we do the case modification. */
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
- temp = sh_modcase (val, pat, modop);
- if (vtype == VT_VARIABLE)
- FREE (val);
- if (temp)
- {
- tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp);
- free (temp);
- temp = tt;
- }
- break;
-
- case VT_POSPARMS:
- temp = pos_params_modcase (val, pat, modop, mflags);
- if (temp && (mflags & MATCH_QUOTED) == 0)
- {
- tt = quote_escapes (temp);
- free (temp);
- temp = tt;
- }
- break;
-
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- temp = assoc_p (v) ? assoc_modcase (assoc_cell (v), pat, modop, mflags)
- : array_modcase (array_cell (v), pat, modop, mflags);
- /* Don't call quote_escapes; array_modcase calls array_quote_escapes
- as appropriate before adding the space separators; ditto for
- assoc_modcase. */
- break;
-#endif
- }
-
- FREE (pat);
- free (lpat);
-
- return temp;
-}
-
-/* Check for unbalanced parens in S, which is the contents of $(( ... )). If
- any occur, this must be a nested command substitution, so return 0.
- Otherwise, return 1. A valid arithmetic expression must always have a
- ( before a matching ), so any cases where there are more right parens
- means that this must not be an arithmetic expression, though the parser
- will not accept it without a balanced total number of parens. */
-static int
-chk_arithsub (s, len)
- const char *s;
- int len;
-{
- int i, count;
- DECLARE_MBSTATE;
-
- i = count = 0;
- while (i < len)
- {
- if (s[i] == LPAREN)
- count++;
- else if (s[i] == RPAREN)
- {
- count--;
- if (count < 0)
- return 0;
- }
-
- switch (s[i])
- {
- default:
- ADVANCE_CHAR (s, len, i);
- break;
-
- case '\\':
- i++;
- if (s[i])
- ADVANCE_CHAR (s, len, i);
- break;
-
- case '\'':
- i = skip_single_quoted (s, len, ++i);
- break;
-
- case '"':
- i = skip_double_quoted ((char *)s, len, ++i);
- break;
- }
- }
-
- return (count == 0);
-}
-
-/****************************************************************/
-/* */
-/* Functions to perform parameter expansion on a string */
-/* */
-/****************************************************************/
-
-/* ${[#][!]name[[:][^[^]][,[,]]#[#]%[%]-=?+[word][:e1[:e2]]]} */
-static WORD_DESC *
-parameter_brace_expand (string, indexp, quoted, pflags, quoted_dollar_atp, contains_dollar_at)
- char *string;
- int *indexp, quoted, *quoted_dollar_atp, *contains_dollar_at, pflags;
-{
- int check_nullness, var_is_set, var_is_null, var_is_special;
- int want_substring, want_indir, want_patsub, want_casemod;
- char *name, *value, *temp, *temp1;
- WORD_DESC *tdesc, *ret;
- int t_index, sindex, c, tflag, modspec;
- intmax_t number;
- arrayind_t ind;
-
- temp = temp1 = value = (char *)NULL;
- var_is_set = var_is_null = var_is_special = check_nullness = 0;
- want_substring = want_indir = want_patsub = want_casemod = 0;
-
- sindex = *indexp;
- t_index = ++sindex;
- /* ${#var} doesn't have any of the other parameter expansions on it. */
- if (string[t_index] == '#' && legal_variable_starter (string[t_index+1])) /* {{ */
- name = string_extract (string, &t_index, "}", SX_VARNAME);
- else
-#if defined (CASEMOD_EXPANSIONS)
- /* To enable case-toggling expansions using the `~' operator character
- change the 1 to 0. */
-# if defined (CASEMOD_CAPCASE)
- name = string_extract (string, &t_index, "#%^,~:-=?+/}", SX_VARNAME);
-# else
- name = string_extract (string, &t_index, "#%^,:-=?+/}", SX_VARNAME);
-# endif /* CASEMOD_CAPCASE */
-#else
- name = string_extract (string, &t_index, "#%:-=?+/}", SX_VARNAME);
-#endif /* CASEMOD_EXPANSIONS */
-
- ret = 0;
- tflag = 0;
-
- ind = INTMAX_MIN;
-
- /* If the name really consists of a special variable, then make sure
- that we have the entire name. We don't allow indirect references
- to special variables except `#', `?', `@' and `*'. */
- if ((sindex == t_index && VALID_SPECIAL_LENGTH_PARAM (string[t_index])) ||
- (sindex == t_index - 1 && string[sindex] == '!' && VALID_INDIR_PARAM (string[t_index])))
- {
- t_index++;
- free (name);
- temp1 = string_extract (string, &t_index, "#%:-=?+/}", 0);
- name = (char *)xmalloc (3 + (strlen (temp1)));
- *name = string[sindex];
- if (string[sindex] == '!')
- {
- /* indirect reference of $#, $?, $@, or $* */
- name[1] = string[sindex + 1];
- strcpy (name + 2, temp1);
- }
- else
- strcpy (name + 1, temp1);
- free (temp1);
- }
- sindex = t_index;
-
- /* Find out what character ended the variable name. Then
- do the appropriate thing. */
- if (c = string[sindex])
- sindex++;
-
- /* If c is followed by one of the valid parameter expansion
- characters, move past it as normal. If not, assume that
- a substring specification is being given, and do not move
- past it. */
- if (c == ':' && VALID_PARAM_EXPAND_CHAR (string[sindex]))
- {
- check_nullness++;
- if (c = string[sindex])
- sindex++;
- }
- else if (c == ':' && string[sindex] != RBRACE)
- want_substring = 1;
- else if (c == '/' && string[sindex] != RBRACE)
- want_patsub = 1;
-#if defined (CASEMOD_EXPANSIONS)
- else if (c == '^' || c == ',' || c == '~')
- {
- modspec = c;
- want_casemod = 1;
- }
-#endif
-
- /* Catch the valid and invalid brace expressions that made it through the
- tests above. */
- /* ${#-} is a valid expansion and means to take the length of $-.
- Similarly for ${#?} and ${##}... */
- if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 &&
- VALID_SPECIAL_LENGTH_PARAM (c) && string[sindex] == RBRACE)
- {
- name = (char *)xrealloc (name, 3);
- name[1] = c;
- name[2] = '\0';
- c = string[sindex++];
- }
-
- /* ...but ${#%}, ${#:}, ${#=}, ${#+}, and ${#/} are errors. */
- if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 &&
- member (c, "%:=+/") && string[sindex] == RBRACE)
- {
- temp = (char *)NULL;
- goto bad_substitution;
- }
-
- /* Indirect expansion begins with a `!'. A valid indirect expansion is
- either a variable name, one of the positional parameters or a special
- variable that expands to one of the positional parameters. */
- want_indir = *name == '!' &&
- (legal_variable_starter ((unsigned char)name[1]) || DIGIT (name[1])
- || VALID_INDIR_PARAM (name[1]));
-
- /* Determine the value of this variable. */
-
- /* Check for special variables, directly referenced. */
- if (SPECIAL_VAR (name, want_indir))
- var_is_special++;
-
- /* Check for special expansion things, like the length of a parameter */
- if (*name == '#' && name[1])
- {
- /* If we are not pointing at the character just after the
- closing brace, then we haven't gotten all of the name.
- Since it begins with a special character, this is a bad
- substitution. Also check NAME for validity before trying
- to go on. */
- if (string[sindex - 1] != RBRACE || (valid_length_expression (name) == 0))
- {
- temp = (char *)NULL;
- goto bad_substitution;
- }
-
- number = parameter_brace_expand_length (name);
- if (number == INTMAX_MIN && unbound_vars_is_error)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (name+1);
- free (name);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- free (name);
-
- *indexp = sindex;
- if (number < 0)
- return (&expand_wdesc_error);
- else
- {
- ret = alloc_word_desc ();
- ret->word = itos (number);
- return ret;
- }
- }
-
- /* ${@} is identical to $@. */
- if (name[0] == '@' && name[1] == '\0')
- {
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
-
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- }
-
- /* Process ${!PREFIX*} expansion. */
- if (want_indir && string[sindex - 1] == RBRACE &&
- (string[sindex - 2] == '*' || string[sindex - 2] == '@') &&
- legal_variable_starter ((unsigned char) name[1]))
- {
- char **x;
- WORD_LIST *xlist;
-
- temp1 = savestring (name + 1);
- number = strlen (temp1);
- temp1[number - 1] = '\0';
- x = all_variables_matching_prefix (temp1);
- xlist = strvec_to_word_list (x, 0, 0);
- if (string[sindex - 2] == '*')
- temp = string_list_dollar_star (xlist);
- else
- {
- temp = string_list_dollar_at (xlist, quoted);
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- }
- free (x);
- dispose_words (xlist);
- free (temp1);
- *indexp = sindex;
-
- ret = alloc_word_desc ();
- ret->word = temp;
- return ret;
- }
-
-#if defined (ARRAY_VARS)
- /* Process ${!ARRAY[@]} and ${!ARRAY[*]} expansion. */ /* [ */
- if (want_indir && string[sindex - 1] == RBRACE &&
- string[sindex - 2] == ']' && valid_array_reference (name+1))
- {
- char *x, *x1;
-
- temp1 = savestring (name + 1);
- x = array_variable_name (temp1, &x1, (int *)0); /* [ */
- FREE (x);
- if (ALL_ELEMENT_SUB (x1[0]) && x1[1] == ']')
- {
- temp = array_keys (temp1, quoted); /* handles assoc vars too */
- if (x1[0] == '@')
- {
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- }
-
- free (temp1);
- *indexp = sindex;
-
- ret = alloc_word_desc ();
- ret->word = temp;
- return ret;
- }
-
- free (temp1);
- }
-#endif /* ARRAY_VARS */
-
- /* Make sure that NAME is valid before trying to go on. */
- if (valid_brace_expansion_word (want_indir ? name + 1 : name,
- var_is_special) == 0)
- {
- temp = (char *)NULL;
- goto bad_substitution;
- }
-
- if (want_indir)
- tdesc = parameter_brace_expand_indir (name + 1, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at);
- else
- tdesc = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND|(pflags&PF_NOSPLIT2), &ind);
-
- if (tdesc)
- {
- temp = tdesc->word;
- tflag = tdesc->flags;
- dispose_word_desc (tdesc);
- }
- else
- temp = (char *)0;
-
-#if defined (ARRAY_VARS)
- if (valid_array_reference (name))
- chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at);
-#endif
-
- var_is_set = temp != (char *)0;
- var_is_null = check_nullness && (var_is_set == 0 || *temp == 0);
-
- /* Get the rest of the stuff inside the braces. */
- if (c && c != RBRACE)
- {
- /* Extract the contents of the ${ ... } expansion
- according to the Posix.2 rules. */
- value = extract_dollar_brace_string (string, &sindex, quoted, (c == '%' || c == '#' || c =='/' || c == '^' || c == ',' || c ==':') ? SX_POSIXEXP|SX_WORD : SX_WORD);
- if (string[sindex] == RBRACE)
- sindex++;
- else
- goto bad_substitution;
- }
- else
- value = (char *)NULL;
-
- *indexp = sindex;
-
- /* All the cases where an expansion can possibly generate an unbound
- variable error. */
- if (want_substring || want_patsub || want_casemod || c == '#' || c == '%' || c == RBRACE)
- {
- if (var_is_set == 0 && unbound_vars_is_error && ((name[0] != '@' && name[0] != '*') || name[1]))
- {
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (name);
- FREE (value);
- FREE (temp);
- free (name);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- }
-
- /* If this is a substring spec, process it and add the result. */
- if (want_substring)
- {
- temp1 = parameter_brace_substring (name, temp, ind, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0);
- FREE (name);
- FREE (value);
- FREE (temp);
-
- if (temp1 == &expand_param_error)
- return (&expand_wdesc_error);
- else if (temp1 == &expand_param_fatal)
- return (&expand_wdesc_fatal);
-
- ret = alloc_word_desc ();
- ret->word = temp1;
- if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ret->flags |= W_QUOTED|W_HASQUOTEDNULL;
- return ret;
- }
- else if (want_patsub)
- {
- temp1 = parameter_brace_patsub (name, temp, ind, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0);
- FREE (name);
- FREE (value);
- FREE (temp);
-
- if (temp1 == &expand_param_error)
- return (&expand_wdesc_error);
- else if (temp1 == &expand_param_fatal)
- return (&expand_wdesc_fatal);
-
- ret = alloc_word_desc ();
- ret->word = temp1;
- ret = alloc_word_desc ();
- ret->word = temp1;
- if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ret->flags |= W_QUOTED|W_HASQUOTEDNULL;
- return ret;
- }
-#if defined (CASEMOD_EXPANSIONS)
- else if (want_casemod)
- {
- temp1 = parameter_brace_casemod (name, temp, ind, modspec, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0);
- FREE (name);
- FREE (value);
- FREE (temp);
-
- if (temp1 == &expand_param_error)
- return (&expand_wdesc_error);
- else if (temp1 == &expand_param_fatal)
- return (&expand_wdesc_fatal);
-
- ret = alloc_word_desc ();
- ret->word = temp1;
- if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ret->flags |= W_QUOTED|W_HASQUOTEDNULL;
- return ret;
- }
-#endif
-
- /* Do the right thing based on which character ended the variable name. */
- switch (c)
- {
- default:
- case '\0':
- bad_substitution:
- report_error (_("%s: bad substitution"), string ? string : "??");
- FREE (value);
- FREE (temp);
- free (name);
- return &expand_wdesc_error;
-
- case RBRACE:
- break;
-
- case '#': /* ${param#[#]pattern} */
- case '%': /* ${param%[%]pattern} */
- if (value == 0 || *value == '\0' || temp == 0 || *temp == '\0')
- {
- FREE (value);
- break;
- }
- temp1 = parameter_brace_remove_pattern (name, temp, ind, value, c, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0);
- free (temp);
- free (value);
- free (name);
-
- ret = alloc_word_desc ();
- ret->word = temp1;
- if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ret->flags |= W_QUOTED|W_HASQUOTEDNULL;
- return ret;
-
- case '-':
- case '=':
- case '?':
- case '+':
- if (var_is_set && var_is_null == 0)
- {
- /* If the operator is `+', we don't want the value of the named
- variable for anything, just the value of the right hand side. */
- if (c == '+')
- {
- /* XXX -- if we're double-quoted and the named variable is "$@",
- we want to turn off any special handling of "$@" --
- we're not using it, so whatever is on the rhs applies. */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 0;
- if (contains_dollar_at)
- *contains_dollar_at = 0;
-
- FREE (temp);
- if (value)
- {
- /* From Posix discussion on austin-group list. Issue 221
- requires that backslashes escaping `}' inside
- double-quoted ${...} be removed. */
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- quoted |= Q_DOLBRACE;
- ret = parameter_brace_expand_rhs (name, value, c,
- quoted,
- quoted_dollar_atp,
- contains_dollar_at);
- /* XXX - fix up later, esp. noting presence of
- W_HASQUOTEDNULL in ret->flags */
- free (value);
- }
- else
- temp = (char *)NULL;
- }
- else
- {
- FREE (value);
- }
- /* Otherwise do nothing; just use the value in TEMP. */
- }
- else /* VAR not set or VAR is NULL. */
- {
- FREE (temp);
- temp = (char *)NULL;
- if (c == '=' && var_is_special)
- {
- report_error (_("$%s: cannot assign in this way"), name);
- free (name);
- free (value);
- return &expand_wdesc_error;
- }
- else if (c == '?')
- {
- parameter_brace_expand_error (name, value);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- else if (c != '+')
- {
- /* XXX -- if we're double-quoted and the named variable is "$@",
- we want to turn off any special handling of "$@" --
- we're not using it, so whatever is on the rhs applies. */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 0;
- if (contains_dollar_at)
- *contains_dollar_at = 0;
-
- /* From Posix discussion on austin-group list. Issue 221 requires
- that backslashes escaping `}' inside double-quoted ${...} be
- removed. */
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- quoted |= Q_DOLBRACE;
- ret = parameter_brace_expand_rhs (name, value, c, quoted,
- quoted_dollar_atp,
- contains_dollar_at);
- /* XXX - fix up later, esp. noting presence of
- W_HASQUOTEDNULL in tdesc->flags */
- }
- free (value);
- }
-
- break;
- }
- free (name);
-
- if (ret == 0)
- {
- ret = alloc_word_desc ();
- ret->flags = tflag;
- ret->word = temp;
- }
- return (ret);
-}
-
-/* Expand a single ${xxx} expansion. The braces are optional. When
- the braces are used, parameter_brace_expand() does the work,
- possibly calling param_expand recursively. */
-static WORD_DESC *
-param_expand (string, sindex, quoted, expanded_something,
- contains_dollar_at, quoted_dollar_at_p, had_quoted_null_p,
- pflags)
- char *string;
- int *sindex, quoted, *expanded_something, *contains_dollar_at;
- int *quoted_dollar_at_p, *had_quoted_null_p, pflags;
-{
- char *temp, *temp1, uerror[3];
- int zindex, t_index, expok;
- unsigned char c;
- intmax_t number;
- SHELL_VAR *var;
- WORD_LIST *list;
- WORD_DESC *tdesc, *ret;
- int tflag;
-
- zindex = *sindex;
- c = string[++zindex];
-
- temp = (char *)NULL;
- ret = tdesc = (WORD_DESC *)NULL;
- tflag = 0;
-
- /* Do simple cases first. Switch on what follows '$'. */
- switch (c)
- {
- /* $0 .. $9? */
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- temp1 = dollar_vars[TODIGIT (c)];
- if (unbound_vars_is_error && temp1 == (char *)NULL)
- {
- uerror[0] = '$';
- uerror[1] = c;
- uerror[2] = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (uerror);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- if (temp1)
- temp = (*temp1 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ? quote_string (temp1)
- : quote_escapes (temp1);
- else
- temp = (char *)NULL;
-
- break;
-
- /* $$ -- pid of the invoking shell. */
- case '$':
- temp = itos (dollar_dollar_pid);
- break;
-
- /* $# -- number of positional parameters. */
- case '#':
- temp = itos (number_of_args ());
- break;
-
- /* $? -- return value of the last synchronous command. */
- case '?':
- temp = itos (last_command_exit_value);
- break;
-
- /* $- -- flags supplied to the shell on invocation or by `set'. */
- case '-':
- temp = which_set_flags ();
- break;
-
- /* $! -- Pid of the last asynchronous command. */
- case '!':
- /* If no asynchronous pids have been created, expand to nothing.
- If `set -u' has been executed, and no async processes have
- been created, this is an expansion error. */
- if (last_asynchronous_pid == NO_PID)
- {
- if (expanded_something)
- *expanded_something = 0;
- temp = (char *)NULL;
- if (unbound_vars_is_error)
- {
- uerror[0] = '$';
- uerror[1] = c;
- uerror[2] = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (uerror);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- }
- else
- temp = itos (last_asynchronous_pid);
- break;
-
- /* The only difference between this and $@ is when the arg is quoted. */
- case '*': /* `$*' */
- list = list_rest_of_args ();
-
-#if 0
- /* According to austin-group posix proposal by Geoff Clare in
- <20090505091501.GA10097@squonk.masqnet> of 5 May 2009:
-
- "The shell shall write a message to standard error and
- immediately exit when it tries to expand an unset parameter
- other than the '@' and '*' special parameters."
- */
-
- if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0)
- {
- uerror[0] = '$';
- uerror[1] = '*';
- uerror[2] = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (uerror);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
-#endif
-
- /* If there are no command-line arguments, this should just
- disappear if there are other characters in the expansion,
- even if it's quoted. */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && list == 0)
- temp = (char *)NULL;
- else if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE))
- {
- /* If we have "$*" we want to make a string of the positional
- parameters, separated by the first character of $IFS, and
- quote the whole string, including the separators. If IFS
- is unset, the parameters are separated by ' '; if $IFS is
- null, the parameters are concatenated. */
- temp = (quoted & (Q_DOUBLE_QUOTES|Q_PATQUOTE)) ? string_list_dollar_star (list) : string_list (list);
- if (temp)
- {
- temp1 = quote_string (temp);
- if (*temp == 0)
- tflag |= W_HASQUOTEDNULL;
- free (temp);
- temp = temp1;
- }
- }
- else
- {
- /* We check whether or not we're eventually going to split $* here,
- for example when IFS is empty and we are processing the rhs of
- an assignment statement. In that case, we don't separate the
- arguments at all. Otherwise, if the $* is not quoted it is
- identical to $@ */
-#if 1
-# if defined (HANDLE_MULTIBYTE)
- if (expand_no_split_dollar_star && ifs_firstc[0] == 0)
-# else
- if (expand_no_split_dollar_star && ifs_firstc == 0)
-# endif
- temp = string_list_dollar_star (list);
- else
- temp = string_list_dollar_at (list, quoted);
-#else
- temp = string_list_dollar_at (list, quoted);
-#endif
- if (expand_no_split_dollar_star == 0 && contains_dollar_at)
- *contains_dollar_at = 1;
- }
-
- dispose_words (list);
- break;
-
- /* When we have "$@" what we want is "$1" "$2" "$3" ... This
- means that we have to turn quoting off after we split into
- the individually quoted arguments so that the final split
- on the first character of $IFS is still done. */
- case '@': /* `$@' */
- list = list_rest_of_args ();
-
-#if 0
- /* According to austin-group posix proposal by Geoff Clare in
- <20090505091501.GA10097@squonk.masqnet> of 5 May 2009:
-
- "The shell shall write a message to standard error and
- immediately exit when it tries to expand an unset parameter
- other than the '@' and '*' special parameters."
- */
-
- if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0)
- {
- uerror[0] = '$';
- uerror[1] = '@';
- uerror[2] = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (uerror);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
-#endif
-
- /* We want to flag the fact that we saw this. We can't turn
- off quoting entirely, because other characters in the
- string might need it (consider "\"$@\""), but we need some
- way to signal that the final split on the first character
- of $IFS should be done, even though QUOTED is 1. */
- /* XXX - should this test include Q_PATQUOTE? */
- if (quoted_dollar_at_p && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- *quoted_dollar_at_p = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
-
-#if 0
- if (pflags & PF_NOSPLIT2)
- temp = string_list_internal (quoted ? quote_list (list) : list, " ");
- else
-#endif
- /* We want to separate the positional parameters with the first
- character of $IFS in case $IFS is something other than a space.
- We also want to make sure that splitting is done no matter what --
- according to POSIX.2, this expands to a list of the positional
- parameters no matter what IFS is set to. */
- temp = string_list_dollar_at (list, quoted);
-
- dispose_words (list);
- break;
-
- case LBRACE:
- tdesc = parameter_brace_expand (string, &zindex, quoted, pflags,
- quoted_dollar_at_p,
- contains_dollar_at);
-
- if (tdesc == &expand_wdesc_error || tdesc == &expand_wdesc_fatal)
- return (tdesc);
- temp = tdesc ? tdesc->word : (char *)0;
-
- /* XXX */
- /* Quoted nulls should be removed if there is anything else
- in the string. */
- /* Note that we saw the quoted null so we can add one back at
- the end of this function if there are no other characters
- in the string, discard TEMP, and go on. The exception to
- this is when we have "${@}" and $1 is '', since $@ needs
- special handling. */
- if (tdesc && tdesc->word && (tdesc->flags & W_HASQUOTEDNULL) && QUOTED_NULL (temp))
- {
- if (had_quoted_null_p)
- *had_quoted_null_p = 1;
- if (*quoted_dollar_at_p == 0)
- {
- free (temp);
- tdesc->word = temp = (char *)NULL;
- }
-
- }
-
- ret = tdesc;
- goto return0;
-
- /* Do command or arithmetic substitution. */
- case LPAREN:
- /* We have to extract the contents of this paren substitution. */
- t_index = zindex + 1;
- temp = extract_command_subst (string, &t_index, 0);
- zindex = t_index;
-
- /* For Posix.2-style `$(( ))' arithmetic substitution,
- extract the expression and pass it to the evaluator. */
- if (temp && *temp == LPAREN)
- {
- char *temp2;
- temp1 = temp + 1;
- temp2 = savestring (temp1);
- t_index = strlen (temp2) - 1;
-
- if (temp2[t_index] != RPAREN)
- {
- free (temp2);
- goto comsub;
- }
-
- /* Cut off ending `)' */
- temp2[t_index] = '\0';
-
- if (chk_arithsub (temp2, t_index) == 0)
- {
- free (temp2);
-#if 0
- internal_warning (_("future versions of the shell will force evaluation as an arithmetic substitution"));
-#endif
- goto comsub;
- }
-
- /* Expand variables found inside the expression. */
- temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES);
- free (temp2);
-
-arithsub:
- /* No error messages. */
- this_command_name = (char *)NULL;
- number = evalexp (temp1, &expok);
- free (temp);
- free (temp1);
- if (expok == 0)
- {
- if (interactive_shell == 0 && posixly_correct)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- return (&expand_wdesc_fatal);
- }
- else
- return (&expand_wdesc_error);
- }
- temp = itos (number);
- break;
- }
-
-comsub:
- if (pflags & PF_NOCOMSUB)
- /* we need zindex+1 because string[zindex] == RPAREN */
- temp1 = substring (string, *sindex, zindex+1);
- else
- {
- tdesc = command_substitute (temp, quoted);
- temp1 = tdesc ? tdesc->word : (char *)NULL;
- if (tdesc)
- dispose_word_desc (tdesc);
- }
- FREE (temp);
- temp = temp1;
- break;
-
- /* Do POSIX.2d9-style arithmetic substitution. This will probably go
- away in a future bash release. */
- case '[':
- /* Extract the contents of this arithmetic substitution. */
- t_index = zindex + 1;
- temp = extract_arithmetic_subst (string, &t_index);
- zindex = t_index;
- if (temp == 0)
- {
- temp = savestring (string);
- if (expanded_something)
- *expanded_something = 0;
- goto return0;
- }
-
- /* Do initial variable expansion. */
- temp1 = expand_arith_string (temp, Q_DOUBLE_QUOTES);
-
- goto arithsub;
-
- default:
- /* Find the variable in VARIABLE_LIST. */
- temp = (char *)NULL;
-
- for (t_index = zindex; (c = string[zindex]) && legal_variable_char (c); zindex++)
- ;
- temp1 = (zindex > t_index) ? substring (string, t_index, zindex) : (char *)NULL;
-
- /* If this isn't a variable name, then just output the `$'. */
- if (temp1 == 0 || *temp1 == '\0')
- {
- FREE (temp1);
- temp = (char *)xmalloc (2);
- temp[0] = '$';
- temp[1] = '\0';
- if (expanded_something)
- *expanded_something = 0;
- goto return0;
- }
-
- /* If the variable exists, return its value cell. */
- var = find_variable (temp1);
-
- if (var && invisible_p (var) == 0 && var_isset (var))
- {
-#if defined (ARRAY_VARS)
- if (assoc_p (var) || array_p (var))
- {
- temp = array_p (var) ? array_reference (array_cell (var), 0)
- : assoc_reference (assoc_cell (var), "0");
- if (temp)
- temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ? quote_string (temp)
- : quote_escapes (temp);
- else if (unbound_vars_is_error)
- goto unbound_variable;
- }
- else
-#endif
- {
- temp = value_cell (var);
-
- temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ? quote_string (temp)
- : quote_escapes (temp);
- }
-
- free (temp1);
-
- goto return0;
- }
-
- temp = (char *)NULL;
-
-unbound_variable:
- if (unbound_vars_is_error)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (temp1);
- }
- else
- {
- free (temp1);
- goto return0;
- }
-
- free (temp1);
- last_command_exit_value = EXECUTION_FAILURE;
- return ((unbound_vars_is_error && interactive_shell == 0)
- ? &expand_wdesc_fatal
- : &expand_wdesc_error);
- }
-
- if (string[zindex])
- zindex++;
-
-return0:
- *sindex = zindex;
-
- if (ret == 0)
- {
- ret = alloc_word_desc ();
- ret->flags = tflag; /* XXX */
- ret->word = temp;
- }
- return ret;
-}
-
-/* Make a word list which is the result of parameter and variable
- expansion, command substitution, arithmetic substitution, and
- quote removal of WORD. Return a pointer to a WORD_LIST which is
- the result of the expansion. If WORD contains a null word, the
- word list returned is also null.
-
- QUOTED contains flag values defined in shell.h.
-
- ISEXP is used to tell expand_word_internal that the word should be
- treated as the result of an expansion. This has implications for
- how IFS characters in the word are treated.
-
- CONTAINS_DOLLAR_AT and EXPANDED_SOMETHING are return values; when non-null
- they point to an integer value which receives information about expansion.
- CONTAINS_DOLLAR_AT gets non-zero if WORD contained "$@", else zero.
- EXPANDED_SOMETHING get non-zero if WORD contained any parameter expansions,
- else zero.
-
- This only does word splitting in the case of $@ expansion. In that
- case, we split on ' '. */
-
-/* Values for the local variable quoted_state. */
-#define UNQUOTED 0
-#define PARTIALLY_QUOTED 1
-#define WHOLLY_QUOTED 2
-
-static WORD_LIST *
-expand_word_internal (word, quoted, isexp, contains_dollar_at, expanded_something)
- WORD_DESC *word;
- int quoted, isexp;
- int *contains_dollar_at;
- int *expanded_something;
-{
- WORD_LIST *list;
- WORD_DESC *tword;
-
- /* The intermediate string that we build while expanding. */
- char *istring;
-
- /* The current size of the above object. */
- int istring_size;
-
- /* Index into ISTRING. */
- int istring_index;
-
- /* Temporary string storage. */
- char *temp, *temp1;
-
- /* The text of WORD. */
- register char *string;
-
- /* The size of STRING. */
- size_t string_size;
-
- /* The index into STRING. */
- int sindex;
-
- /* This gets 1 if we see a $@ while quoted. */
- int quoted_dollar_at;
-
- /* One of UNQUOTED, PARTIALLY_QUOTED, or WHOLLY_QUOTED, depending on
- whether WORD contains no quoting characters, a partially quoted
- string (e.g., "xx"ab), or is fully quoted (e.g., "xxab"). */
- int quoted_state;
-
- /* State flags */
- int had_quoted_null;
- int has_dollar_at;
- int tflag;
- int pflags; /* flags passed to param_expand */
-
- int assignoff; /* If assignment, offset of `=' */
-
- register unsigned char c; /* Current character. */
- int t_index; /* For calls to string_extract_xxx. */
-
- char twochars[2];
-
- DECLARE_MBSTATE;
-
- istring = (char *)xmalloc (istring_size = DEFAULT_INITIAL_ARRAY_SIZE);
- istring[istring_index = 0] = '\0';
- quoted_dollar_at = had_quoted_null = has_dollar_at = 0;
- quoted_state = UNQUOTED;
-
- string = word->word;
- if (string == 0)
- goto finished_with_string;
- /* Don't need the string length for the SADD... and COPY_ macros unless
- multibyte characters are possible. */
- string_size = (MB_CUR_MAX > 1) ? strlen (string) : 1;
-
- if (contains_dollar_at)
- *contains_dollar_at = 0;
-
- assignoff = -1;
-
- /* Begin the expansion. */
-
- for (sindex = 0; ;)
- {
- c = string[sindex];
-
- /* Case on toplevel character. */
- switch (c)
- {
- case '\0':
- goto finished_with_string;
-
- case CTLESC:
- sindex++;
-#if HANDLE_MULTIBYTE
- if (MB_CUR_MAX > 1 && string[sindex])
- {
- SADD_MBQCHAR_BODY(temp, string, sindex, string_size);
- }
- else
-#endif
- {
- temp = (char *)xmalloc (3);
- temp[0] = CTLESC;
- temp[1] = c = string[sindex];
- temp[2] = '\0';
- }
-
-dollar_add_string:
- if (string[sindex])
- sindex++;
-
-add_string:
- if (temp)
- {
- istring = sub_append_string (temp, istring, &istring_index, &istring_size);
- temp = (char *)0;
- }
-
- break;
-
-#if defined (PROCESS_SUBSTITUTION)
- /* Process substitution. */
- case '<':
- case '>':
- {
- if (string[++sindex] != LPAREN || (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (word->flags & (W_DQUOTE|W_NOPROCSUB)) || posixly_correct)
- {
- sindex--; /* add_character: label increments sindex */
- goto add_character;
- }
- else
- t_index = sindex + 1; /* skip past both '<' and LPAREN */
-
- temp1 = extract_process_subst (string, (c == '<') ? "<(" : ">(", &t_index); /*))*/
- sindex = t_index;
-
- /* If the process substitution specification is `<()', we want to
- open the pipe for writing in the child and produce output; if
- it is `>()', we want to open the pipe for reading in the child
- and consume input. */
- temp = temp1 ? process_substitute (temp1, (c == '>')) : (char *)0;
-
- FREE (temp1);
-
- goto dollar_add_string;
- }
-#endif /* PROCESS_SUBSTITUTION */
-
- case '=':
- /* Posix.2 section 3.6.1 says that tildes following `=' in words
- which are not assignment statements are not expanded. If the
- shell isn't in posix mode, though, we perform tilde expansion
- on `likely candidate' unquoted assignment statements (flags
- include W_ASSIGNMENT but not W_QUOTED). A likely candidate
- contains an unquoted :~ or =~. Something to think about: we
- now have a flag that says to perform tilde expansion on arguments
- to `assignment builtins' like declare and export that look like
- assignment statements. We now do tilde expansion on such words
- even in POSIX mode. */
- if (word->flags & (W_ASSIGNRHS|W_NOTILDE))
- {
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c))
- goto add_ifs_character;
- else
- goto add_character;
- }
- /* If we're not in posix mode or forcing assignment-statement tilde
- expansion, note where the `=' appears in the word and prepare to
- do tilde expansion following the first `='. */
- if ((word->flags & W_ASSIGNMENT) &&
- (posixly_correct == 0 || (word->flags & W_TILDEEXP)) &&
- assignoff == -1 && sindex > 0)
- assignoff = sindex;
- if (sindex == assignoff && string[sindex+1] == '~') /* XXX */
- word->flags |= W_ITILDE;
-#if 0
- else if ((word->flags & W_ASSIGNMENT) &&
- (posixly_correct == 0 || (word->flags & W_TILDEEXP)) &&
- string[sindex+1] == '~')
- word->flags |= W_ITILDE;
-#endif
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c))
- goto add_ifs_character;
- else
- goto add_character;
-
- case ':':
- if (word->flags & W_NOTILDE)
- {
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c))
- goto add_ifs_character;
- else
- goto add_character;
- }
-
- if ((word->flags & (W_ASSIGNMENT|W_ASSIGNRHS|W_TILDEEXP)) &&
- string[sindex+1] == '~')
- word->flags |= W_ITILDE;
-
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c))
- goto add_ifs_character;
- else
- goto add_character;
-
- case '~':
- /* If the word isn't supposed to be tilde expanded, or we're not
- at the start of a word or after an unquoted : or = in an
- assignment statement, we don't do tilde expansion. */
- if ((word->flags & (W_NOTILDE|W_DQUOTE)) ||
- (sindex > 0 && ((word->flags & W_ITILDE) == 0)) ||
- (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- {
- word->flags &= ~W_ITILDE;
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0)
- goto add_ifs_character;
- else
- goto add_character;
- }
-
- if (word->flags & W_ASSIGNRHS)
- tflag = 2;
- else if (word->flags & (W_ASSIGNMENT|W_TILDEEXP))
- tflag = 1;
- else
- tflag = 0;
-
- temp = bash_tilde_find_word (string + sindex, tflag, &t_index);
-
- word->flags &= ~W_ITILDE;
-
- if (temp && *temp && t_index > 0)
- {
- temp1 = bash_tilde_expand (temp, tflag);
- if (temp1 && *temp1 == '~' && STREQ (temp, temp1))
- {
- FREE (temp);
- FREE (temp1);
- goto add_character; /* tilde expansion failed */
- }
- free (temp);
- temp = temp1;
- sindex += t_index;
- goto add_quoted_string; /* XXX was add_string */
- }
- else
- {
- FREE (temp);
- goto add_character;
- }
-
- case '$':
- if (expanded_something)
- *expanded_something = 1;
-
- has_dollar_at = 0;
- pflags = (word->flags & W_NOCOMSUB) ? PF_NOCOMSUB : 0;
- if (word->flags & W_NOSPLIT2)
- pflags |= PF_NOSPLIT2;
- tword = param_expand (string, &sindex, quoted, expanded_something,
- &has_dollar_at, "ed_dollar_at,
- &had_quoted_null, pflags);
-
- if (tword == &expand_wdesc_error || tword == &expand_wdesc_fatal)
- {
- free (string);
- free (istring);
- return ((tword == &expand_wdesc_error) ? &expand_word_error
- : &expand_word_fatal);
- }
- if (contains_dollar_at && has_dollar_at)
- *contains_dollar_at = 1;
-
- if (tword && (tword->flags & W_HASQUOTEDNULL))
- had_quoted_null = 1;
-
- temp = tword->word;
- dispose_word_desc (tword);
-
- goto add_string;
- break;
-
- case '`': /* Backquoted command substitution. */
- {
- t_index = sindex++;
-
- temp = string_extract (string, &sindex, "`", SX_REQMATCH);
- /* The test of sindex against t_index is to allow bare instances of
- ` to pass through, for backwards compatibility. */
- if (temp == &extract_string_error || temp == &extract_string_fatal)
- {
- if (sindex - 1 == t_index)
- {
- sindex = t_index;
- goto add_character;
- }
- report_error (_("bad substitution: no closing \"`\" in %s") , string+t_index);
- free (string);
- free (istring);
- return ((temp == &extract_string_error) ? &expand_word_error
- : &expand_word_fatal);
- }
-
- if (expanded_something)
- *expanded_something = 1;
-
- if (word->flags & W_NOCOMSUB)
- /* sindex + 1 because string[sindex] == '`' */
- temp1 = substring (string, t_index, sindex + 1);
- else
- {
- de_backslash (temp);
- tword = command_substitute (temp, quoted);
- temp1 = tword ? tword->word : (char *)NULL;
- if (tword)
- dispose_word_desc (tword);
- }
- FREE (temp);
- temp = temp1;
- goto dollar_add_string;
- }
-
- case '\\':
- if (string[sindex + 1] == '\n')
- {
- sindex += 2;
- continue;
- }
-
- c = string[++sindex];
-
- if (quoted & Q_HERE_DOCUMENT)
- tflag = CBSHDOC;
- else if (quoted & Q_DOUBLE_QUOTES)
- tflag = CBSDQUOTE;
- else
- tflag = 0;
-
- /* From Posix discussion on austin-group list: Backslash escaping
- a } in ${...} is removed. Issue 0000221 */
- if ((quoted & Q_DOLBRACE) && c == RBRACE)
- {
- SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size);
- }
- else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && ((sh_syntaxtab[c] & tflag) == 0))
- {
- SCOPY_CHAR_I (twochars, '\\', c, string, sindex, string_size);
- }
- else if (c == 0)
- {
- c = CTLNUL;
- sindex--; /* add_character: label increments sindex */
- goto add_character;
- }
- else
- {
- SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size);
- }
-
- sindex++;
-add_twochars:
- /* BEFORE jumping here, we need to increment sindex if appropriate */
- RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size,
- DEFAULT_ARRAY_SIZE);
- istring[istring_index++] = twochars[0];
- istring[istring_index++] = twochars[1];
- istring[istring_index] = '\0';
-
- break;
-
- case '"':
-#if 0
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (word->flags & W_DQUOTE))
-#else
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
-#endif
- goto add_character;
-
- t_index = ++sindex;
- temp = string_extract_double_quoted (string, &sindex, 0);
-
- /* If the quotes surrounded the entire string, then the
- whole word was quoted. */
- quoted_state = (t_index == 1 && string[sindex] == '\0')
- ? WHOLLY_QUOTED
- : PARTIALLY_QUOTED;
-
- if (temp && *temp)
- {
- tword = alloc_word_desc ();
- tword->word = temp;
-
- temp = (char *)NULL;
-
- has_dollar_at = 0;
- /* Need to get W_HASQUOTEDNULL flag through this function. */
- list = expand_word_internal (tword, Q_DOUBLE_QUOTES, 0, &has_dollar_at, (int *)NULL);
-
- if (list == &expand_word_error || list == &expand_word_fatal)
- {
- free (istring);
- free (string);
- /* expand_word_internal has already freed temp_word->word
- for us because of the way it prints error messages. */
- tword->word = (char *)NULL;
- dispose_word (tword);
- return list;
- }
-
- dispose_word (tword);
-
- /* "$@" (a double-quoted dollar-at) expands into nothing,
- not even a NULL word, when there are no positional
- parameters. */
- if (list == 0 && has_dollar_at)
- {
- quoted_dollar_at++;
- break;
- }
-
- /* If we get "$@", we know we have expanded something, so we
- need to remember it for the final split on $IFS. This is
- a special case; it's the only case where a quoted string
- can expand into more than one word. It's going to come back
- from the above call to expand_word_internal as a list with
- a single word, in which all characters are quoted and
- separated by blanks. What we want to do is to turn it back
- into a list for the next piece of code. */
- if (list)
- dequote_list (list);
-
- if (list && list->word && (list->word->flags & W_HASQUOTEDNULL))
- had_quoted_null = 1;
-
- if (has_dollar_at)
- {
- quoted_dollar_at++;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- if (expanded_something)
- *expanded_something = 1;
- }
- }
- else
- {
- /* What we have is "". This is a minor optimization. */
- FREE (temp);
- list = (WORD_LIST *)NULL;
- }
-
- /* The code above *might* return a list (consider the case of "$@",
- where it returns "$1", "$2", etc.). We can't throw away the
- rest of the list, and we have to make sure each word gets added
- as quoted. We test on tresult->next: if it is non-NULL, we
- quote the whole list, save it to a string with string_list, and
- add that string. We don't need to quote the results of this
- (and it would be wrong, since that would quote the separators
- as well), so we go directly to add_string. */
- if (list)
- {
- if (list->next)
- {
-#if 0
- if (quoted_dollar_at && (word->flags & W_NOSPLIT2))
- temp = string_list_internal (quote_list (list), " ");
- else
-#endif
- /* Testing quoted_dollar_at makes sure that "$@" is
- split correctly when $IFS does not contain a space. */
- temp = quoted_dollar_at
- ? string_list_dollar_at (list, Q_DOUBLE_QUOTES)
- : string_list (quote_list (list));
- dispose_words (list);
- goto add_string;
- }
- else
- {
- temp = savestring (list->word->word);
- tflag = list->word->flags;
- dispose_words (list);
-
- /* If the string is not a quoted null string, we want
- to remove any embedded unquoted CTLNUL characters.
- We do not want to turn quoted null strings back into
- the empty string, though. We do this because we
- want to remove any quoted nulls from expansions that
- contain other characters. For example, if we have
- x"$*"y or "x$*y" and there are no positional parameters,
- the $* should expand into nothing. */
- /* We use the W_HASQUOTEDNULL flag to differentiate the
- cases: a quoted null character as above and when
- CTLNUL is contained in the (non-null) expansion
- of some variable. We use the had_quoted_null flag to
- pass the value through this function to its caller. */
- if ((tflag & W_HASQUOTEDNULL) && QUOTED_NULL (temp) == 0)
- remove_quoted_nulls (temp); /* XXX */
- }
- }
- else
- temp = (char *)NULL;
-
- /* We do not want to add quoted nulls to strings that are only
- partially quoted; we can throw them away. */
- if (temp == 0 && quoted_state == PARTIALLY_QUOTED && (word->flags & (W_NOSPLIT|W_NOSPLIT2)))
- continue;
-
- add_quoted_string:
-
- if (temp)
- {
- temp1 = temp;
- temp = quote_string (temp);
- free (temp1);
- goto add_string;
- }
- else
- {
- /* Add NULL arg. */
- c = CTLNUL;
- sindex--; /* add_character: label increments sindex */
- goto add_character;
- }
-
- /* break; */
-
- case '\'':
-#if 0
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (word->flags & W_DQUOTE))
-#else
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
-#endif
- goto add_character;
-
- t_index = ++sindex;
- temp = string_extract_single_quoted (string, &sindex);
-
- /* If the entire STRING was surrounded by single quotes,
- then the string is wholly quoted. */
- quoted_state = (t_index == 1 && string[sindex] == '\0')
- ? WHOLLY_QUOTED
- : PARTIALLY_QUOTED;
-
- /* If all we had was '', it is a null expansion. */
- if (*temp == '\0')
- {
- free (temp);
- temp = (char *)NULL;
- }
- else
- remove_quoted_escapes (temp); /* ??? */
-
- /* We do not want to add quoted nulls to strings that are only
- partially quoted; such nulls are discarded. */
- if (temp == 0 && (quoted_state == PARTIALLY_QUOTED))
- continue;
-
- /* If we have a quoted null expansion, add a quoted NULL to istring. */
- if (temp == 0)
- {
- c = CTLNUL;
- sindex--; /* add_character: label increments sindex */
- goto add_character;
- }
- else
- goto add_quoted_string;
-
- /* break; */
-
- default:
- /* This is the fix for " $@ " */
- add_ifs_character:
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (isexp == 0 && isifs (c)))
- {
- if (string[sindex]) /* from old goto dollar_add_string */
- sindex++;
- if (c == 0)
- {
- c = CTLNUL;
- goto add_character;
- }
- else
- {
-#if HANDLE_MULTIBYTE
- if (MB_CUR_MAX > 1)
- sindex--;
-
- if (MB_CUR_MAX > 1)
- {
- SADD_MBQCHAR_BODY(temp, string, sindex, string_size);
- }
- else
-#endif
- {
- twochars[0] = CTLESC;
- twochars[1] = c;
- goto add_twochars;
- }
- }
- }
-
- SADD_MBCHAR (temp, string, sindex, string_size);
-
- add_character:
- RESIZE_MALLOCED_BUFFER (istring, istring_index, 1, istring_size,
- DEFAULT_ARRAY_SIZE);
- istring[istring_index++] = c;
- istring[istring_index] = '\0';
-
- /* Next character. */
- sindex++;
- }
- }
-
-finished_with_string:
- /* OK, we're ready to return. If we have a quoted string, and
- quoted_dollar_at is not set, we do no splitting at all; otherwise
- we split on ' '. The routines that call this will handle what to
- do if nothing has been expanded. */
-
- /* Partially and wholly quoted strings which expand to the empty
- string are retained as an empty arguments. Unquoted strings
- which expand to the empty string are discarded. The single
- exception is the case of expanding "$@" when there are no
- positional parameters. In that case, we discard the expansion. */
-
- /* Because of how the code that handles "" and '' in partially
- quoted strings works, we need to make ISTRING into a QUOTED_NULL
- if we saw quoting characters, but the expansion was empty.
- "" and '' are tossed away before we get to this point when
- processing partially quoted strings. This makes "" and $xxx""
- equivalent when xxx is unset. We also look to see whether we
- saw a quoted null from a ${} expansion and add one back if we
- need to. */
-
- /* If we expand to nothing and there were no single or double quotes
- in the word, we throw it away. Otherwise, we return a NULL word.
- The single exception is for $@ surrounded by double quotes when
- there are no positional parameters. In that case, we also throw
- the word away. */
-
- if (*istring == '\0')
- {
- if (quoted_dollar_at == 0 && (had_quoted_null || quoted_state == PARTIALLY_QUOTED))
- {
- istring[0] = CTLNUL;
- istring[1] = '\0';
- tword = make_bare_word (istring);
- tword->flags |= W_HASQUOTEDNULL; /* XXX */
- list = make_word_list (tword, (WORD_LIST *)NULL);
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- tword->flags |= W_QUOTED;
- }
- /* According to sh, ksh, and Posix.2, if a word expands into nothing
- and a double-quoted "$@" appears anywhere in it, then the entire
- word is removed. */
- else if (quoted_state == UNQUOTED || quoted_dollar_at)
- list = (WORD_LIST *)NULL;
-#if 0
- else
- {
- tword = make_bare_word (istring);
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- tword->flags |= W_QUOTED;
- list = make_word_list (tword, (WORD_LIST *)NULL);
- }
-#else
- else
- list = (WORD_LIST *)NULL;
-#endif
- }
- else if (word->flags & W_NOSPLIT)
- {
- tword = make_bare_word (istring);
- if (word->flags & W_ASSIGNMENT)
- tword->flags |= W_ASSIGNMENT; /* XXX */
- if (word->flags & W_COMPASSIGN)
- tword->flags |= W_COMPASSIGN; /* XXX */
- if (word->flags & W_NOGLOB)
- tword->flags |= W_NOGLOB; /* XXX */
- if (word->flags & W_NOEXPAND)
- tword->flags |= W_NOEXPAND; /* XXX */
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- tword->flags |= W_QUOTED;
- if (had_quoted_null)
- tword->flags |= W_HASQUOTEDNULL;
- list = make_word_list (tword, (WORD_LIST *)NULL);
- }
- else
- {
- char *ifs_chars;
-
- ifs_chars = (quoted_dollar_at || has_dollar_at) ? ifs_value : (char *)NULL;
-
- /* If we have $@, we need to split the results no matter what. If
- IFS is unset or NULL, string_list_dollar_at has separated the
- positional parameters with a space, so we split on space (we have
- set ifs_chars to " \t\n" above if ifs is unset). If IFS is set,
- string_list_dollar_at has separated the positional parameters
- with the first character of $IFS, so we split on $IFS. */
- if (has_dollar_at && ifs_chars)
- list = list_string (istring, *ifs_chars ? ifs_chars : " ", 1);
- else
- {
- tword = make_bare_word (istring);
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (quoted_state == WHOLLY_QUOTED))
- tword->flags |= W_QUOTED;
- if (word->flags & W_ASSIGNMENT)
- tword->flags |= W_ASSIGNMENT;
- if (word->flags & W_COMPASSIGN)
- tword->flags |= W_COMPASSIGN;
- if (word->flags & W_NOGLOB)
- tword->flags |= W_NOGLOB;
- if (word->flags & W_NOEXPAND)
- tword->flags |= W_NOEXPAND;
- if (had_quoted_null)
- tword->flags |= W_HASQUOTEDNULL; /* XXX */
- list = make_word_list (tword, (WORD_LIST *)NULL);
- }
- }
-
- free (istring);
- return (list);
-}
-
-/* **************************************************************** */
-/* */
-/* Functions for Quote Removal */
-/* */
-/* **************************************************************** */
-
-/* Perform quote removal on STRING. If QUOTED > 0, assume we are obeying the
- backslash quoting rules for within double quotes or a here document. */
-char *
-string_quote_removal (string, quoted)
- char *string;
- int quoted;
-{
- size_t slen;
- char *r, *result_string, *temp, *send;
- int sindex, tindex, dquote;
- unsigned char c;
- DECLARE_MBSTATE;
-
- /* The result can be no longer than the original string. */
- slen = strlen (string);
- send = string + slen;
-
- r = result_string = (char *)xmalloc (slen + 1);
-
- for (dquote = sindex = 0; c = string[sindex];)
- {
- switch (c)
- {
- case '\\':
- c = string[++sindex];
- if (c == 0)
- {
- *r++ = '\\';
- break;
- }
- if (((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote) && (sh_syntaxtab[c] & CBSDQUOTE) == 0)
- *r++ = '\\';
- /* FALLTHROUGH */
-
- default:
- SCOPY_CHAR_M (r, string, send, sindex);
- break;
-
- case '\'':
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote)
- {
- *r++ = c;
- sindex++;
- break;
- }
- tindex = sindex + 1;
- temp = string_extract_single_quoted (string, &tindex);
- if (temp)
- {
- strcpy (r, temp);
- r += strlen (r);
- free (temp);
- }
- sindex = tindex;
- break;
-
- case '"':
- dquote = 1 - dquote;
- sindex++;
- break;
- }
- }
- *r = '\0';
- return (result_string);
-}
-
-#if 0
-/* UNUSED */
-/* Perform quote removal on word WORD. This allocates and returns a new
- WORD_DESC *. */
-WORD_DESC *
-word_quote_removal (word, quoted)
- WORD_DESC *word;
- int quoted;
-{
- WORD_DESC *w;
- char *t;
-
- t = string_quote_removal (word->word, quoted);
- w = alloc_word_desc ();
- w->word = t ? t : savestring ("");
- return (w);
-}
-
-/* Perform quote removal on all words in LIST. If QUOTED is non-zero,
- the members of the list are treated as if they are surrounded by
- double quotes. Return a new list, or NULL if LIST is NULL. */
-WORD_LIST *
-word_list_quote_removal (list, quoted)
- WORD_LIST *list;
- int quoted;
-{
- WORD_LIST *result, *t, *tresult, *e;
-
- for (t = list, result = (WORD_LIST *)NULL; t; t = t->next)
- {
- tresult = make_word_list (word_quote_removal (t->word, quoted), (WORD_LIST *)NULL);
-#if 0
- result = (WORD_LIST *) list_append (result, tresult);
-#else
- if (result == 0)
- result = e = tresult;
- else
- {
- e->next = tresult;
- while (e->next)
- e = e->next;
- }
-#endif
- }
- return (result);
-}
-#endif
-
-/*******************************************
- * *
- * Functions to perform word splitting *
- * *
- *******************************************/
-
-void
-setifs (v)
- SHELL_VAR *v;
-{
- char *t;
- unsigned char uc;
-
- ifs_var = v;
- ifs_value = (v && value_cell (v)) ? value_cell (v) : " \t\n";
-
- /* Should really merge ifs_cmap with sh_syntaxtab. XXX - doesn't yet
- handle multibyte chars in IFS */
- memset (ifs_cmap, '\0', sizeof (ifs_cmap));
- for (t = ifs_value ; t && *t; t++)
- {
- uc = *t;
- ifs_cmap[uc] = 1;
- }
-
-#if defined (HANDLE_MULTIBYTE)
- if (ifs_value == 0)
- {
- ifs_firstc[0] = '\0';
- ifs_firstc_len = 1;
- }
- else
- {
- size_t ifs_len;
- ifs_len = strnlen (ifs_value, MB_CUR_MAX);
- ifs_firstc_len = MBLEN (ifs_value, ifs_len);
- if (ifs_firstc_len == 1 || ifs_firstc_len == 0 || MB_INVALIDCH (ifs_firstc_len))
- {
- ifs_firstc[0] = ifs_value[0];
- ifs_firstc[1] = '\0';
- ifs_firstc_len = 1;
- }
- else
- memcpy (ifs_firstc, ifs_value, ifs_firstc_len);
- }
-#else
- ifs_firstc = ifs_value ? *ifs_value : 0;
-#endif
-}
-
-char *
-getifs ()
-{
- return ifs_value;
-}
-
-/* This splits a single word into a WORD LIST on $IFS, but only if the word
- is not quoted. list_string () performs quote removal for us, even if we
- don't do any splitting. */
-WORD_LIST *
-word_split (w, ifs_chars)
- WORD_DESC *w;
- char *ifs_chars;
-{
- WORD_LIST *result;
-
- if (w)
- {
- char *xifs;
-
- xifs = ((w->flags & W_QUOTED) || ifs_chars == 0) ? "" : ifs_chars;
- result = list_string (w->word, xifs, w->flags & W_QUOTED);
- }
- else
- result = (WORD_LIST *)NULL;
-
- return (result);
-}
-
-/* Perform word splitting on LIST and return the RESULT. It is possible
- to return (WORD_LIST *)NULL. */
-static WORD_LIST *
-word_list_split (list)
- WORD_LIST *list;
-{
- WORD_LIST *result, *t, *tresult, *e;
-
- for (t = list, result = (WORD_LIST *)NULL; t; t = t->next)
- {
- tresult = word_split (t->word, ifs_value);
- if (result == 0)
- result = e = tresult;
- else
- {
- e->next = tresult;
- while (e->next)
- e = e->next;
- }
- }
- return (result);
-}
-
-/**************************************************
- * *
- * Functions to expand an entire WORD_LIST *
- * *
- **************************************************/
-
-/* Do any word-expansion-specific cleanup and jump to top_level */
-static void
-exp_jump_to_top_level (v)
- int v;
-{
- set_pipestatus_from_exit (last_command_exit_value);
-
- /* Cleanup code goes here. */
- expand_no_split_dollar_star = 0; /* XXX */
- expanding_redir = 0;
- assigning_in_environment = 0;
-
- if (parse_and_execute_level == 0)
- top_level_cleanup (); /* from sig.c */
-
- jump_to_top_level (v);
-}
-
-/* Put NLIST (which is a WORD_LIST * of only one element) at the front of
- ELIST, and set ELIST to the new list. */
-#define PREPEND_LIST(nlist, elist) \
- do { nlist->next = elist; elist = nlist; } while (0)
-
-/* Separate out any initial variable assignments from TLIST. If set -k has
- been executed, remove all assignment statements from TLIST. Initial
- variable assignments and other environment assignments are placed
- on SUBST_ASSIGN_VARLIST. */
-static WORD_LIST *
-separate_out_assignments (tlist)
- WORD_LIST *tlist;
-{
- register WORD_LIST *vp, *lp;
-
- if (tlist == 0)
- return ((WORD_LIST *)NULL);
-
- if (subst_assign_varlist)
- dispose_words (subst_assign_varlist); /* Clean up after previous error */
-
- subst_assign_varlist = (WORD_LIST *)NULL;
- vp = lp = tlist;
-
- /* Separate out variable assignments at the start of the command.
- Loop invariant: vp->next == lp
- Loop postcondition:
- lp = list of words left after assignment statements skipped
- tlist = original list of words
- */
- while (lp && (lp->word->flags & W_ASSIGNMENT))
- {
- vp = lp;
- lp = lp->next;
- }
-
- /* If lp != tlist, we have some initial assignment statements.
- We make SUBST_ASSIGN_VARLIST point to the list of assignment
- words and TLIST point to the remaining words. */
- if (lp != tlist)
- {
- subst_assign_varlist = tlist;
- /* ASSERT(vp->next == lp); */
- vp->next = (WORD_LIST *)NULL; /* terminate variable list */
- tlist = lp; /* remainder of word list */
- }
-
- /* vp == end of variable list */
- /* tlist == remainder of original word list without variable assignments */
- if (!tlist)
- /* All the words in tlist were assignment statements */
- return ((WORD_LIST *)NULL);
-
- /* ASSERT(tlist != NULL); */
- /* ASSERT((tlist->word->flags & W_ASSIGNMENT) == 0); */
-
- /* If the -k option is in effect, we need to go through the remaining
- words, separate out the assignment words, and place them on
- SUBST_ASSIGN_VARLIST. */
- if (place_keywords_in_env)
- {
- WORD_LIST *tp; /* tp == running pointer into tlist */
-
- tp = tlist;
- lp = tlist->next;
-
- /* Loop Invariant: tp->next == lp */
- /* Loop postcondition: tlist == word list without assignment statements */
- while (lp)
- {
- if (lp->word->flags & W_ASSIGNMENT)
- {
- /* Found an assignment statement, add this word to end of
- subst_assign_varlist (vp). */
- if (!subst_assign_varlist)
- subst_assign_varlist = vp = lp;
- else
- {
- vp->next = lp;
- vp = lp;
- }
-
- /* Remove the word pointed to by LP from TLIST. */
- tp->next = lp->next;
- /* ASSERT(vp == lp); */
- lp->next = (WORD_LIST *)NULL;
- lp = tp->next;
- }
- else
- {
- tp = lp;
- lp = lp->next;
- }
- }
- }
- return (tlist);
-}
-
-#define WEXP_VARASSIGN 0x001
-#define WEXP_BRACEEXP 0x002
-#define WEXP_TILDEEXP 0x004
-#define WEXP_PARAMEXP 0x008
-#define WEXP_PATHEXP 0x010
-
-/* All of the expansions, including variable assignments at the start of
- the list. */
-#define WEXP_ALL (WEXP_VARASSIGN|WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP)
-
-/* All of the expansions except variable assignments at the start of
- the list. */
-#define WEXP_NOVARS (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP)
-
-/* All of the `shell expansions': brace expansion, tilde expansion, parameter
- expansion, command substitution, arithmetic expansion, word splitting, and
- quote removal. */
-#define WEXP_SHELLEXP (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP)
-
-/* Take the list of words in LIST and do the various substitutions. Return
- a new list of words which is the expanded list, and without things like
- variable assignments. */
-
-WORD_LIST *
-expand_words (list)
- WORD_LIST *list;
-{
- return (expand_word_list_internal (list, WEXP_ALL));
-}
-
-/* Same as expand_words (), but doesn't hack variable or environment
- variables. */
-WORD_LIST *
-expand_words_no_vars (list)
- WORD_LIST *list;
-{
- return (expand_word_list_internal (list, WEXP_NOVARS));
-}
-
-WORD_LIST *
-expand_words_shellexp (list)
- WORD_LIST *list;
-{
- return (expand_word_list_internal (list, WEXP_SHELLEXP));
-}
-
-static WORD_LIST *
-glob_expand_word_list (tlist, eflags)
- WORD_LIST *tlist;
- int eflags;
-{
- char **glob_array, *temp_string;
- register int glob_index;
- WORD_LIST *glob_list, *output_list, *disposables, *next;
- WORD_DESC *tword;
-
- output_list = disposables = (WORD_LIST *)NULL;
- glob_array = (char **)NULL;
- while (tlist)
- {
- /* For each word, either globbing is attempted or the word is
- added to orig_list. If globbing succeeds, the results are
- added to orig_list and the word (tlist) is added to the list
- of disposable words. If globbing fails and failed glob
- expansions are left unchanged (the shell default), the
- original word is added to orig_list. If globbing fails and
- failed glob expansions are removed, the original word is
- added to the list of disposable words. orig_list ends up
- in reverse order and requires a call to REVERSE_LIST to
- be set right. After all words are examined, the disposable
- words are freed. */
- next = tlist->next;
-
- /* If the word isn't an assignment and contains an unquoted
- pattern matching character, then glob it. */
- if ((tlist->word->flags & W_NOGLOB) == 0 &&
- unquoted_glob_pattern_p (tlist->word->word))
- {
- glob_array = shell_glob_filename (tlist->word->word);
-
- /* Handle error cases.
- I don't think we should report errors like "No such file
- or directory". However, I would like to report errors
- like "Read failed". */
-
- if (glob_array == 0 || GLOB_FAILED (glob_array))
- {
- glob_array = (char **)xmalloc (sizeof (char *));
- glob_array[0] = (char *)NULL;
- }
-
- /* Dequote the current word in case we have to use it. */
- if (glob_array[0] == NULL)
- {
- temp_string = dequote_string (tlist->word->word);
- free (tlist->word->word);
- tlist->word->word = temp_string;
- }
-
- /* Make the array into a word list. */
- glob_list = (WORD_LIST *)NULL;
- for (glob_index = 0; glob_array[glob_index]; glob_index++)
- {
- tword = make_bare_word (glob_array[glob_index]);
- tword->flags |= W_GLOBEXP; /* XXX */
- glob_list = make_word_list (tword, glob_list);
- }
-
- if (glob_list)
- {
- output_list = (WORD_LIST *)list_append (glob_list, output_list);
- PREPEND_LIST (tlist, disposables);
- }
- else if (fail_glob_expansion != 0)
- {
- report_error (_("no match: %s"), tlist->word->word);
- exp_jump_to_top_level (DISCARD);
- }
- else if (allow_null_glob_expansion == 0)
- {
- /* Failed glob expressions are left unchanged. */
- PREPEND_LIST (tlist, output_list);
- }
- else
- {
- /* Failed glob expressions are removed. */
- PREPEND_LIST (tlist, disposables);
- }
- }
- else
- {
- /* Dequote the string. */
- temp_string = dequote_string (tlist->word->word);
- free (tlist->word->word);
- tlist->word->word = temp_string;
- PREPEND_LIST (tlist, output_list);
- }
-
- strvec_dispose (glob_array);
- glob_array = (char **)NULL;
-
- tlist = next;
- }
-
- if (disposables)
- dispose_words (disposables);
-
- if (output_list)
- output_list = REVERSE_LIST (output_list, WORD_LIST *);
-
- return (output_list);
-}
-
-#if defined (BRACE_EXPANSION)
-static WORD_LIST *
-brace_expand_word_list (tlist, eflags)
- WORD_LIST *tlist;
- int eflags;
-{
- register char **expansions;
- char *temp_string;
- WORD_LIST *disposables, *output_list, *next;
- WORD_DESC *w;
- int eindex;
-
- for (disposables = output_list = (WORD_LIST *)NULL; tlist; tlist = next)
- {
- next = tlist->next;
-
- if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG))
- {
-/*itrace("brace_expand_word_list: %s: W_COMPASSIGN|W_ASSIGNARG", tlist->word->word);*/
- PREPEND_LIST (tlist, output_list);
- continue;
- }
-
- /* Only do brace expansion if the word has a brace character. If
- not, just add the word list element to BRACES and continue. In
- the common case, at least when running shell scripts, this will
- degenerate to a bunch of calls to `mbschr', and then what is
- basically a reversal of TLIST into BRACES, which is corrected
- by a call to REVERSE_LIST () on BRACES when the end of TLIST
- is reached. */
- if (mbschr (tlist->word->word, LBRACE))
- {
- expansions = brace_expand (tlist->word->word);
-
- for (eindex = 0; temp_string = expansions[eindex]; eindex++)
- {
- w = make_word (temp_string);
- /* If brace expansion didn't change the word, preserve
- the flags. We may want to preserve the flags
- unconditionally someday -- XXX */
- if (STREQ (temp_string, tlist->word->word))
- w->flags = tlist->word->flags;
- output_list = make_word_list (w, output_list);
- free (expansions[eindex]);
- }
- free (expansions);
-
- /* Add TLIST to the list of words to be freed after brace
- expansion has been performed. */
- PREPEND_LIST (tlist, disposables);
- }
- else
- PREPEND_LIST (tlist, output_list);
- }
-
- if (disposables)
- dispose_words (disposables);
-
- if (output_list)
- output_list = REVERSE_LIST (output_list, WORD_LIST *);
-
- return (output_list);
-}
-#endif
-
-#if defined (ARRAY_VARS)
-/* Take WORD, a compound associative array assignment, and internally run
- 'declare -A w', where W is the variable name portion of WORD. */
-static int
-make_internal_declare (word, option)
- char *word;
- char *option;
-{
- int t;
- WORD_LIST *wl;
- WORD_DESC *w;
-
- w = make_word (word);
-
- t = assignment (w->word, 0);
- w->word[t] = '\0';
-
- wl = make_word_list (w, (WORD_LIST *)NULL);
- wl = make_word_list (make_word (option), wl);
-
- return (declare_builtin (wl));
-}
-#endif
-
-static WORD_LIST *
-shell_expand_word_list (tlist, eflags)
- WORD_LIST *tlist;
- int eflags;
-{
- WORD_LIST *expanded, *orig_list, *new_list, *next, *temp_list;
- int expanded_something, has_dollar_at;
- char *temp_string;
-
- /* We do tilde expansion all the time. This is what 1003.2 says. */
- new_list = (WORD_LIST *)NULL;
- for (orig_list = tlist; tlist; tlist = next)
- {
- temp_string = tlist->word->word;
-
- next = tlist->next;
-
-#if defined (ARRAY_VARS)
- /* If this is a compound array assignment to a builtin that accepts
- such assignments (e.g., `declare'), take the assignment and perform
- it separately, handling the semantics of declarations inside shell
- functions. This avoids the double-evaluation of such arguments,
- because `declare' does some evaluation of compound assignments on
- its own. */
- if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG))
- {
- int t;
-
- if (tlist->word->flags & W_ASSIGNASSOC)
- make_internal_declare (tlist->word->word, "-A");
-
- t = do_word_assignment (tlist->word, 0);
- if (t == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- exp_jump_to_top_level (DISCARD);
- }
-
- /* Now transform the word as ksh93 appears to do and go on */
- t = assignment (tlist->word->word, 0);
- tlist->word->word[t] = '\0';
- tlist->word->flags &= ~(W_ASSIGNMENT|W_NOSPLIT|W_COMPASSIGN|W_ASSIGNARG|W_ASSIGNASSOC);
- }
-#endif
-
- expanded_something = 0;
- expanded = expand_word_internal
- (tlist->word, 0, 0, &has_dollar_at, &expanded_something);
-
- if (expanded == &expand_word_error || expanded == &expand_word_fatal)
- {
- /* By convention, each time this error is returned,
- tlist->word->word has already been freed. */
- tlist->word->word = (char *)NULL;
-
- /* Dispose our copy of the original list. */
- dispose_words (orig_list);
- /* Dispose the new list we're building. */
- dispose_words (new_list);
-
- last_command_exit_value = EXECUTION_FAILURE;
- if (expanded == &expand_word_error)
- exp_jump_to_top_level (DISCARD);
- else
- exp_jump_to_top_level (FORCE_EOF);
- }
-
- /* Don't split words marked W_NOSPLIT. */
- if (expanded_something && (tlist->word->flags & W_NOSPLIT) == 0)
- {
- temp_list = word_list_split (expanded);
- dispose_words (expanded);
- }
- else
- {
- /* If no parameter expansion, command substitution, process
- substitution, or arithmetic substitution took place, then
- do not do word splitting. We still have to remove quoted
- null characters from the result. */
- word_list_remove_quoted_nulls (expanded);
- temp_list = expanded;
- }
-
- expanded = REVERSE_LIST (temp_list, WORD_LIST *);
- new_list = (WORD_LIST *)list_append (expanded, new_list);
- }
-
- if (orig_list)
- dispose_words (orig_list);
-
- if (new_list)
- new_list = REVERSE_LIST (new_list, WORD_LIST *);
-
- return (new_list);
-}
-
-/* The workhorse for expand_words () and expand_words_no_vars ().
- First arg is LIST, a WORD_LIST of words.
- Second arg EFLAGS is a flags word controlling which expansions are
- performed.
-
- This does all of the substitutions: brace expansion, tilde expansion,
- parameter expansion, command substitution, arithmetic expansion,
- process substitution, word splitting, and pathname expansion, according
- to the bits set in EFLAGS. Words with the W_QUOTED or W_NOSPLIT bits
- set, or for which no expansion is done, do not undergo word splitting.
- Words with the W_NOGLOB bit set do not undergo pathname expansion. */
-static WORD_LIST *
-expand_word_list_internal (list, eflags)
- WORD_LIST *list;
- int eflags;
-{
- WORD_LIST *new_list, *temp_list;
- int tint;
-
- if (list == 0)
- return ((WORD_LIST *)NULL);
-
- garglist = new_list = copy_word_list (list);
- if (eflags & WEXP_VARASSIGN)
- {
- garglist = new_list = separate_out_assignments (new_list);
- if (new_list == 0)
- {
- if (subst_assign_varlist)
- {
- /* All the words were variable assignments, so they are placed
- into the shell's environment. */
- for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next)
- {
- this_command_name = (char *)NULL; /* no arithmetic errors */
- tint = do_word_assignment (temp_list->word, 0);
- /* Variable assignment errors in non-interactive shells
- running in Posix.2 mode cause the shell to exit. */
- if (tint == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- if (interactive_shell == 0 && posixly_correct)
- exp_jump_to_top_level (FORCE_EOF);
- else
- exp_jump_to_top_level (DISCARD);
- }
- }
- dispose_words (subst_assign_varlist);
- subst_assign_varlist = (WORD_LIST *)NULL;
- }
- return ((WORD_LIST *)NULL);
- }
- }
-
- /* Begin expanding the words that remain. The expansions take place on
- things that aren't really variable assignments. */
-
-#if defined (BRACE_EXPANSION)
- /* Do brace expansion on this word if there are any brace characters
- in the string. */
- if ((eflags & WEXP_BRACEEXP) && brace_expansion && new_list)
- new_list = brace_expand_word_list (new_list, eflags);
-#endif /* BRACE_EXPANSION */
-
- /* Perform the `normal' shell expansions: tilde expansion, parameter and
- variable substitution, command substitution, arithmetic expansion,
- and word splitting. */
- new_list = shell_expand_word_list (new_list, eflags);
-
- /* Okay, we're almost done. Now let's just do some filename
- globbing. */
- if (new_list)
- {
- if ((eflags & WEXP_PATHEXP) && disallow_filename_globbing == 0)
- /* Glob expand the word list unless globbing has been disabled. */
- new_list = glob_expand_word_list (new_list, eflags);
- else
- /* Dequote the words, because we're not performing globbing. */
- new_list = dequote_list (new_list);
- }
-
- if ((eflags & WEXP_VARASSIGN) && subst_assign_varlist)
- {
- sh_wassign_func_t *assign_func;
- int is_special_builtin, is_builtin_or_func;
-
- /* If the remainder of the words expand to nothing, Posix.2 requires
- that the variable and environment assignments affect the shell's
- environment. */
- assign_func = new_list ? assign_in_env : do_word_assignment;
- tempenv_assign_error = 0;
-
- is_builtin_or_func = (new_list && new_list->word && (find_shell_builtin (new_list->word->word) || find_function (new_list->word->word)));
- /* Posix says that special builtins exit if a variable assignment error
- occurs in an assignment preceding it. */
- is_special_builtin = (posixly_correct && new_list && new_list->word && find_special_builtin (new_list->word->word));
-
- for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next)
- {
- this_command_name = (char *)NULL;
- assigning_in_environment = (assign_func == assign_in_env);
- tint = (*assign_func) (temp_list->word, is_builtin_or_func);
- assigning_in_environment = 0;
- /* Variable assignment errors in non-interactive shells running
- in Posix.2 mode cause the shell to exit. */
- if (tint == 0)
- {
- if (assign_func == do_word_assignment)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- if (interactive_shell == 0 && posixly_correct && is_special_builtin)
- exp_jump_to_top_level (FORCE_EOF);
- else
- exp_jump_to_top_level (DISCARD);
- }
- else
- tempenv_assign_error++;
- }
- }
-
- dispose_words (subst_assign_varlist);
- subst_assign_varlist = (WORD_LIST *)NULL;
- }
-
-#if 0
- tint = list_length (new_list) + 1;
- RESIZE_MALLOCED_BUFFER (glob_argv_flags, 0, tint, glob_argv_flags_size, 16);
- for (tint = 0, temp_list = new_list; temp_list; temp_list = temp_list->next)
- glob_argv_flags[tint++] = (temp_list->word->flags & W_GLOBEXP) ? '1' : '0';
- glob_argv_flags[tint] = '\0';
-#endif
-
- return (new_list);
-}
+++ /dev/null
-/* subst.c -- The part of the shell that does parameter, command, arithmetic,
- and globbing substitutions. */
-
-/* ``Have a little faith, there's magic in the night. You ain't a
- beauty, but, hey, you're alright.'' */
-
-/* Copyright (C) 1987-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#include "bashtypes.h"
-#include <stdio.h>
-#include "chartypes.h"
-#if defined (HAVE_PWD_H)
-# include <pwd.h>
-#endif
-#include <signal.h>
-#include <errno.h>
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include "bashansi.h"
-#include "posixstat.h"
-#include "bashintl.h"
-
-#include "shell.h"
-#include "parser.h"
-#include "flags.h"
-#include "jobs.h"
-#include "execute_cmd.h"
-#include "filecntl.h"
-#include "trap.h"
-#include "pathexp.h"
-#include "mailcheck.h"
-
-#include "shmbutil.h"
-#include "typemax.h"
-
-#include "builtins/getopt.h"
-#include "builtins/common.h"
-
-#include "builtins/builtext.h"
-
-#include <tilde/tilde.h>
-#include <glob/strmatch.h>
-
-#if !defined (errno)
-extern int errno;
-#endif /* !errno */
-
-/* The size that strings change by. */
-#define DEFAULT_INITIAL_ARRAY_SIZE 112
-#define DEFAULT_ARRAY_SIZE 128
-
-/* Variable types. */
-#define VT_VARIABLE 0
-#define VT_POSPARMS 1
-#define VT_ARRAYVAR 2
-#define VT_ARRAYMEMBER 3
-#define VT_ASSOCVAR 4
-
-#define VT_STARSUB 128 /* $* or ${array[*]} -- used to split */
-
-/* Flags for quoted_strchr */
-#define ST_BACKSL 0x01
-#define ST_CTLESC 0x02
-#define ST_SQUOTE 0x04 /* unused yet */
-#define ST_DQUOTE 0x08 /* unused yet */
-
-/* Flags for the `pflags' argument to param_expand() */
-#define PF_NOCOMSUB 0x01 /* Do not perform command substitution */
-#define PF_IGNUNBOUND 0x02 /* ignore unbound vars even if -u set */
-#define PF_NOSPLIT2 0x04 /* same as W_NOSPLIT2 */
-#define PF_ASSIGNRHS 0x08 /* same as W_ASSIGNRHS */
-
-/* These defs make it easier to use the editor. */
-#define LBRACE '{'
-#define RBRACE '}'
-#define LPAREN '('
-#define RPAREN ')'
-
-#if defined (HANDLE_MULTIBYTE)
-#define WLPAREN L'('
-#define WRPAREN L')'
-#endif
-
-/* Evaluates to 1 if C is one of the shell's special parameters whose length
- can be taken, but is also one of the special expansion characters. */
-#define VALID_SPECIAL_LENGTH_PARAM(c) \
- ((c) == '-' || (c) == '?' || (c) == '#')
-
-/* Evaluates to 1 if C is one of the shell's special parameters for which an
- indirect variable reference may be made. */
-#define VALID_INDIR_PARAM(c) \
- ((posixly_correct == 0 && (c) == '#') || (posixly_correct == 0 && (c) == '?') || (c) == '@' || (c) == '*')
-
-/* Evaluates to 1 if C is one of the OP characters that follows the parameter
- in ${parameter[:]OPword}. */
-#define VALID_PARAM_EXPAND_CHAR(c) (sh_syntaxtab[(unsigned char)c] & CSUBSTOP)
-
-/* Evaluates to 1 if this is one of the shell's special variables. */
-#define SPECIAL_VAR(name, wi) \
- ((DIGIT (*name) && all_digits (name)) || \
- (name[1] == '\0' && (sh_syntaxtab[(unsigned char)*name] & CSPECVAR)) || \
- (wi && name[2] == '\0' && VALID_INDIR_PARAM (name[1])))
-
-/* An expansion function that takes a string and a quoted flag and returns
- a WORD_LIST *. Used as the type of the third argument to
- expand_string_if_necessary(). */
-typedef WORD_LIST *EXPFUNC __P((char *, int));
-
-/* Process ID of the last command executed within command substitution. */
-pid_t last_command_subst_pid = NO_PID;
-pid_t current_command_subst_pid = NO_PID;
-
-/* Variables used to keep track of the characters in IFS. */
-SHELL_VAR *ifs_var;
-char *ifs_value;
-unsigned char ifs_cmap[UCHAR_MAX + 1];
-
-#if defined (HANDLE_MULTIBYTE)
-unsigned char ifs_firstc[MB_LEN_MAX];
-size_t ifs_firstc_len;
-#else
-unsigned char ifs_firstc;
-#endif
-
-/* Sentinel to tell when we are performing variable assignments preceding a
- command name and putting them into the environment. Used to make sure
- we use the temporary environment when looking up variable values. */
-int assigning_in_environment;
-
-/* Used to hold a list of variable assignments preceding a command. Global
- so the SIGCHLD handler in jobs.c can unwind-protect it when it runs a
- SIGCHLD trap and so it can be saved and restored by the trap handlers. */
-WORD_LIST *subst_assign_varlist = (WORD_LIST *)NULL;
-
-/* Extern functions and variables from different files. */
-extern int last_command_exit_value, last_command_exit_signal;
-extern int subshell_environment, line_number;
-extern int subshell_level, parse_and_execute_level, sourcelevel;
-extern int eof_encountered;
-extern int return_catch_flag, return_catch_value;
-extern pid_t dollar_dollar_pid;
-extern int posixly_correct;
-extern char *this_command_name;
-extern struct fd_bitmap *current_fds_to_close;
-extern int wordexp_only;
-extern int expanding_redir;
-extern int tempenv_assign_error;
-
-#if !defined (HAVE_WCSDUP) && defined (HANDLE_MULTIBYTE)
-extern wchar_t *wcsdup __P((const wchar_t *));
-#endif
-
-/* Non-zero means to allow unmatched globbed filenames to expand to
- a null file. */
-int allow_null_glob_expansion;
-
-/* Non-zero means to throw an error when globbing fails to match anything. */
-int fail_glob_expansion;
-
-#if 0
-/* Variables to keep track of which words in an expanded word list (the
- output of expand_word_list_internal) are the result of globbing
- expansions. GLOB_ARGV_FLAGS is used by execute_cmd.c.
- (CURRENTLY UNUSED). */
-char *glob_argv_flags;
-static int glob_argv_flags_size;
-#endif
-
-static WORD_LIST expand_word_error, expand_word_fatal;
-static WORD_DESC expand_wdesc_error, expand_wdesc_fatal;
-static char expand_param_error, expand_param_fatal;
-static char extract_string_error, extract_string_fatal;
-
-/* Tell the expansion functions to not longjmp back to top_level on fatal
- errors. Enabled when doing completion and prompt string expansion. */
-static int no_longjmp_on_fatal_error = 0;
-
-/* Set by expand_word_unsplit; used to inhibit splitting and re-joining
- $* on $IFS, primarily when doing assignment statements. */
-static int expand_no_split_dollar_star = 0;
-
-/* A WORD_LIST of words to be expanded by expand_word_list_internal,
- without any leading variable assignments. */
-static WORD_LIST *garglist = (WORD_LIST *)NULL;
-
-static char *quoted_substring __P((char *, int, int));
-static int quoted_strlen __P((char *));
-static char *quoted_strchr __P((char *, int, int));
-
-static char *expand_string_if_necessary __P((char *, int, EXPFUNC *));
-static inline char *expand_string_to_string_internal __P((char *, int, EXPFUNC *));
-static WORD_LIST *call_expand_word_internal __P((WORD_DESC *, int, int, int *, int *));
-static WORD_LIST *expand_string_internal __P((char *, int));
-static WORD_LIST *expand_string_leave_quoted __P((char *, int));
-static WORD_LIST *expand_string_for_rhs __P((char *, int, int *, int *));
-
-static WORD_LIST *list_quote_escapes __P((WORD_LIST *));
-static char *make_quoted_char __P((int));
-static WORD_LIST *quote_list __P((WORD_LIST *));
-
-static int unquoted_substring __P((char *, char *));
-static int unquoted_member __P((int, char *));
-
-#if defined (ARRAY_VARS)
-static SHELL_VAR *do_compound_assignment __P((char *, char *, int));
-#endif
-static int do_assignment_internal __P((const WORD_DESC *, int));
-
-static char *string_extract_verbatim __P((char *, size_t, int *, char *, int));
-static char *string_extract __P((char *, int *, char *, int));
-static char *string_extract_double_quoted __P((char *, int *, int));
-static inline char *string_extract_single_quoted __P((char *, int *));
-static inline int skip_single_quoted __P((const char *, size_t, int));
-static int skip_double_quoted __P((char *, size_t, int));
-static char *extract_delimited_string __P((char *, int *, char *, char *, char *, int));
-static char *extract_dollar_brace_string __P((char *, int *, int, int));
-static int skip_matched_pair __P((const char *, int, int, int, int));
-
-static char *pos_params __P((char *, int, int, int));
-
-static unsigned char *mb_getcharlens __P((char *, int));
-
-static char *remove_upattern __P((char *, char *, int));
-#if defined (HANDLE_MULTIBYTE)
-static wchar_t *remove_wpattern __P((wchar_t *, size_t, wchar_t *, int));
-#endif
-static char *remove_pattern __P((char *, char *, int));
-
-static int match_upattern __P((char *, char *, int, char **, char **));
-#if defined (HANDLE_MULTIBYTE)
-static int match_wpattern __P((wchar_t *, char **, size_t, wchar_t *, int, char **, char **));
-#endif
-static int match_pattern __P((char *, char *, int, char **, char **));
-static int getpatspec __P((int, char *));
-static char *getpattern __P((char *, int, int));
-static char *variable_remove_pattern __P((char *, char *, int, int));
-static char *list_remove_pattern __P((WORD_LIST *, char *, int, int, int));
-static char *parameter_list_remove_pattern __P((int, char *, int, int));
-#ifdef ARRAY_VARS
-static char *array_remove_pattern __P((SHELL_VAR *, char *, int, char *, int));
-#endif
-static char *parameter_brace_remove_pattern __P((char *, char *, int, char *, int, int, int));
-
-static char *process_substitute __P((char *, int));
-
-static char *read_comsub __P((int, int, int *));
-
-#ifdef ARRAY_VARS
-static arrayind_t array_length_reference __P((char *));
-#endif
-
-static int valid_brace_expansion_word __P((char *, int));
-static int chk_atstar __P((char *, int, int *, int *));
-static int chk_arithsub __P((const char *, int));
-
-static WORD_DESC *parameter_brace_expand_word __P((char *, int, int, int, arrayind_t *));
-static WORD_DESC *parameter_brace_expand_indir __P((char *, int, int, int *, int *));
-static WORD_DESC *parameter_brace_expand_rhs __P((char *, char *, int, int, int *, int *));
-static void parameter_brace_expand_error __P((char *, char *));
-
-static int valid_length_expression __P((char *));
-static intmax_t parameter_brace_expand_length __P((char *));
-
-static char *skiparith __P((char *, int));
-static int verify_substring_values __P((SHELL_VAR *, char *, char *, int, intmax_t *, intmax_t *));
-static int get_var_and_type __P((char *, char *, arrayind_t, int, int, SHELL_VAR **, char **));
-static char *mb_substring __P((char *, int, int));
-static char *parameter_brace_substring __P((char *, char *, int, char *, int, int));
-
-static int shouldexp_replacement __P((char *));
-
-static char *pos_params_pat_subst __P((char *, char *, char *, int));
-
-static char *parameter_brace_patsub __P((char *, char *, int, char *, int, int));
-
-static char *pos_params_casemod __P((char *, char *, int, int));
-static char *parameter_brace_casemod __P((char *, char *, int, int, char *, int, int));
-
-static WORD_DESC *parameter_brace_expand __P((char *, int *, int, int, int *, int *));
-static WORD_DESC *param_expand __P((char *, int *, int, int *, int *, int *, int *, int));
-
-static WORD_LIST *expand_word_internal __P((WORD_DESC *, int, int, int *, int *));
-
-static WORD_LIST *word_list_split __P((WORD_LIST *));
-
-static void exp_jump_to_top_level __P((int));
-
-static WORD_LIST *separate_out_assignments __P((WORD_LIST *));
-static WORD_LIST *glob_expand_word_list __P((WORD_LIST *, int));
-#ifdef BRACE_EXPANSION
-static WORD_LIST *brace_expand_word_list __P((WORD_LIST *, int));
-#endif
-#if defined (ARRAY_VARS)
-static int make_internal_declare __P((char *, char *));
-#endif
-static WORD_LIST *shell_expand_word_list __P((WORD_LIST *, int));
-static WORD_LIST *expand_word_list_internal __P((WORD_LIST *, int));
-
-/* **************************************************************** */
-/* */
-/* Utility Functions */
-/* */
-/* **************************************************************** */
-
-#if defined (DEBUG)
-void
-dump_word_flags (flags)
- int flags;
-{
- int f;
-
- f = flags;
- fprintf (stderr, "%d -> ", f);
- if (f & W_ASSIGNASSOC)
- {
- f &= ~W_ASSIGNASSOC;
- fprintf (stderr, "W_ASSIGNASSOC%s", f ? "|" : "");
- }
- if (f & W_HASCTLESC)
- {
- f &= ~W_HASCTLESC;
- fprintf (stderr, "W_HASCTLESC%s", f ? "|" : "");
- }
- if (f & W_NOPROCSUB)
- {
- f &= ~W_NOPROCSUB;
- fprintf (stderr, "W_NOPROCSUB%s", f ? "|" : "");
- }
- if (f & W_DQUOTE)
- {
- f &= ~W_DQUOTE;
- fprintf (stderr, "W_DQUOTE%s", f ? "|" : "");
- }
- if (f & W_HASQUOTEDNULL)
- {
- f &= ~W_HASQUOTEDNULL;
- fprintf (stderr, "W_HASQUOTEDNULL%s", f ? "|" : "");
- }
- if (f & W_ASSIGNARG)
- {
- f &= ~W_ASSIGNARG;
- fprintf (stderr, "W_ASSIGNARG%s", f ? "|" : "");
- }
- if (f & W_ASSNBLTIN)
- {
- f &= ~W_ASSNBLTIN;
- fprintf (stderr, "W_ASSNBLTIN%s", f ? "|" : "");
- }
- if (f & W_COMPASSIGN)
- {
- f &= ~W_COMPASSIGN;
- fprintf (stderr, "W_COMPASSIGN%s", f ? "|" : "");
- }
- if (f & W_NOEXPAND)
- {
- f &= ~W_NOEXPAND;
- fprintf (stderr, "W_NOEXPAND%s", f ? "|" : "");
- }
- if (f & W_ITILDE)
- {
- f &= ~W_ITILDE;
- fprintf (stderr, "W_ITILDE%s", f ? "|" : "");
- }
- if (f & W_NOTILDE)
- {
- f &= ~W_NOTILDE;
- fprintf (stderr, "W_NOTILDE%s", f ? "|" : "");
- }
- if (f & W_ASSIGNRHS)
- {
- f &= ~W_ASSIGNRHS;
- fprintf (stderr, "W_ASSIGNRHS%s", f ? "|" : "");
- }
- if (f & W_NOCOMSUB)
- {
- f &= ~W_NOCOMSUB;
- fprintf (stderr, "W_NOCOMSUB%s", f ? "|" : "");
- }
- if (f & W_DOLLARSTAR)
- {
- f &= ~W_DOLLARSTAR;
- fprintf (stderr, "W_DOLLARSTAR%s", f ? "|" : "");
- }
- if (f & W_DOLLARAT)
- {
- f &= ~W_DOLLARAT;
- fprintf (stderr, "W_DOLLARAT%s", f ? "|" : "");
- }
- if (f & W_TILDEEXP)
- {
- f &= ~W_TILDEEXP;
- fprintf (stderr, "W_TILDEEXP%s", f ? "|" : "");
- }
- if (f & W_NOSPLIT2)
- {
- f &= ~W_NOSPLIT2;
- fprintf (stderr, "W_NOSPLIT2%s", f ? "|" : "");
- }
- if (f & W_NOGLOB)
- {
- f &= ~W_NOGLOB;
- fprintf (stderr, "W_NOGLOB%s", f ? "|" : "");
- }
- if (f & W_NOSPLIT)
- {
- f &= ~W_NOSPLIT;
- fprintf (stderr, "W_NOSPLIT%s", f ? "|" : "");
- }
- if (f & W_GLOBEXP)
- {
- f &= ~W_GLOBEXP;
- fprintf (stderr, "W_GLOBEXP%s", f ? "|" : "");
- }
- if (f & W_ASSIGNMENT)
- {
- f &= ~W_ASSIGNMENT;
- fprintf (stderr, "W_ASSIGNMENT%s", f ? "|" : "");
- }
- if (f & W_QUOTED)
- {
- f &= ~W_QUOTED;
- fprintf (stderr, "W_QUOTED%s", f ? "|" : "");
- }
- if (f & W_HASDOLLAR)
- {
- f &= ~W_HASDOLLAR;
- fprintf (stderr, "W_HASDOLLAR%s", f ? "|" : "");
- }
- fprintf (stderr, "\n");
- fflush (stderr);
-}
-#endif
-
-#ifdef INCLUDE_UNUSED
-static char *
-quoted_substring (string, start, end)
- char *string;
- int start, end;
-{
- register int len, l;
- register char *result, *s, *r;
-
- len = end - start;
-
- /* Move to string[start], skipping quoted characters. */
- for (s = string, l = 0; *s && l < start; )
- {
- if (*s == CTLESC)
- {
- s++;
- continue;
- }
- l++;
- if (*s == 0)
- break;
- }
-
- r = result = (char *)xmalloc (2*len + 1); /* save room for quotes */
-
- /* Copy LEN characters, including quote characters. */
- s = string + l;
- for (l = 0; l < len; s++)
- {
- if (*s == CTLESC)
- *r++ = *s++;
- *r++ = *s;
- l++;
- if (*s == 0)
- break;
- }
- *r = '\0';
- return result;
-}
-#endif
-
-#ifdef INCLUDE_UNUSED
-/* Return the length of S, skipping over quoted characters */
-static int
-quoted_strlen (s)
- char *s;
-{
- register char *p;
- int i;
-
- i = 0;
- for (p = s; *p; p++)
- {
- if (*p == CTLESC)
- {
- p++;
- if (*p == 0)
- return (i + 1);
- }
- i++;
- }
-
- return i;
-}
-#endif
-
-/* Find the first occurrence of character C in string S, obeying shell
- quoting rules. If (FLAGS & ST_BACKSL) is non-zero, backslash-escaped
- characters are skipped. If (FLAGS & ST_CTLESC) is non-zero, characters
- escaped with CTLESC are skipped. */
-static char *
-quoted_strchr (s, c, flags)
- char *s;
- int c, flags;
-{
- register char *p;
-
- for (p = s; *p; p++)
- {
- if (((flags & ST_BACKSL) && *p == '\\')
- || ((flags & ST_CTLESC) && *p == CTLESC))
- {
- p++;
- if (*p == '\0')
- return ((char *)NULL);
- continue;
- }
- else if (*p == c)
- return p;
- }
- return ((char *)NULL);
-}
-
-/* Return 1 if CHARACTER appears in an unquoted portion of
- STRING. Return 0 otherwise. CHARACTER must be a single-byte character. */
-static int
-unquoted_member (character, string)
- int character;
- char *string;
-{
- size_t slen;
- int sindex, c;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- sindex = 0;
- while (c = string[sindex])
- {
- if (c == character)
- return (1);
-
- switch (c)
- {
- default:
- ADVANCE_CHAR (string, slen, sindex);
- break;
-
- case '\\':
- sindex++;
- if (string[sindex])
- ADVANCE_CHAR (string, slen, sindex);
- break;
-
- case '\'':
- sindex = skip_single_quoted (string, slen, ++sindex);
- break;
-
- case '"':
- sindex = skip_double_quoted (string, slen, ++sindex);
- break;
- }
- }
- return (0);
-}
-
-/* Return 1 if SUBSTR appears in an unquoted portion of STRING. */
-static int
-unquoted_substring (substr, string)
- char *substr, *string;
-{
- size_t slen;
- int sindex, c, sublen;
- DECLARE_MBSTATE;
-
- if (substr == 0 || *substr == '\0')
- return (0);
-
- slen = strlen (string);
- sublen = strlen (substr);
- for (sindex = 0; c = string[sindex]; )
- {
- if (STREQN (string + sindex, substr, sublen))
- return (1);
-
- switch (c)
- {
- case '\\':
- sindex++;
- if (string[sindex])
- ADVANCE_CHAR (string, slen, sindex);
- break;
-
- case '\'':
- sindex = skip_single_quoted (string, slen, ++sindex);
- break;
-
- case '"':
- sindex = skip_double_quoted (string, slen, ++sindex);
- break;
-
- default:
- ADVANCE_CHAR (string, slen, sindex);
- break;
- }
- }
- return (0);
-}
-
-/* Most of the substitutions must be done in parallel. In order
- to avoid using tons of unclear goto's, I have some functions
- for manipulating malloc'ed strings. They all take INDX, a
- pointer to an integer which is the offset into the string
- where manipulation is taking place. They also take SIZE, a
- pointer to an integer which is the current length of the
- character array for this string. */
-
-/* Append SOURCE to TARGET at INDEX. SIZE is the current amount
- of space allocated to TARGET. SOURCE can be NULL, in which
- case nothing happens. Gets rid of SOURCE by freeing it.
- Returns TARGET in case the location has changed. */
-INLINE char *
-sub_append_string (source, target, indx, size)
- char *source, *target;
- int *indx, *size;
-{
- if (source)
- {
- int srclen, n;
-
- srclen = STRLEN (source);
- if (srclen >= (int)(*size - *indx))
- {
- n = srclen + *indx;
- n = (n + DEFAULT_ARRAY_SIZE) - (n % DEFAULT_ARRAY_SIZE);
- target = (char *)xrealloc (target, (*size = n));
- }
-
- FASTCOPY (source, target + *indx, srclen);
- *indx += srclen;
- target[*indx] = '\0';
-
- free (source);
- }
- return (target);
-}
-
-#if 0
-/* UNUSED */
-/* Append the textual representation of NUMBER to TARGET.
- INDX and SIZE are as in SUB_APPEND_STRING. */
-char *
-sub_append_number (number, target, indx, size)
- intmax_t number;
- int *indx, *size;
- char *target;
-{
- char *temp;
-
- temp = itos (number);
- return (sub_append_string (temp, target, indx, size));
-}
-#endif
-
-/* Extract a substring from STRING, starting at SINDEX and ending with
- one of the characters in CHARLIST. Don't make the ending character
- part of the string. Leave SINDEX pointing at the ending character.
- Understand about backslashes in the string. If (flags & SX_VARNAME)
- is non-zero, and array variables have been compiled into the shell,
- everything between a `[' and a corresponding `]' is skipped over.
- If (flags & SX_NOALLOC) is non-zero, don't return the substring, just
- update SINDEX. If (flags & SX_REQMATCH) is non-zero, the string must
- contain a closing character from CHARLIST. */
-static char *
-string_extract (string, sindex, charlist, flags)
- char *string;
- int *sindex;
- char *charlist;
- int flags;
-{
- register int c, i;
- int found;
- size_t slen;
- char *temp;
- DECLARE_MBSTATE;
-
- slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0;
- i = *sindex;
- found = 0;
- while (c = string[i])
- {
- if (c == '\\')
- {
- if (string[i + 1])
- i++;
- else
- break;
- }
-#if defined (ARRAY_VARS)
- else if ((flags & SX_VARNAME) && c == '[')
- {
- int ni;
- /* If this is an array subscript, skip over it and continue. */
- ni = skipsubscript (string, i, 0);
- if (string[ni] == ']')
- i = ni;
- }
-#endif
- else if (MEMBER (c, charlist))
- {
- found = 1;
- break;
- }
-
- ADVANCE_CHAR (string, slen, i);
- }
-
- /* If we had to have a matching delimiter and didn't find one, return an
- error and let the caller deal with it. */
- if ((flags & SX_REQMATCH) && found == 0)
- {
- *sindex = i;
- return (&extract_string_error);
- }
-
- temp = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i);
- *sindex = i;
-
- return (temp);
-}
-
-/* Extract the contents of STRING as if it is enclosed in double quotes.
- SINDEX, when passed in, is the offset of the character immediately
- following the opening double quote; on exit, SINDEX is left pointing after
- the closing double quote. If STRIPDQ is non-zero, unquoted double
- quotes are stripped and the string is terminated by a null byte.
- Backslashes between the embedded double quotes are processed. If STRIPDQ
- is zero, an unquoted `"' terminates the string. */
-static char *
-string_extract_double_quoted (string, sindex, stripdq)
- char *string;
- int *sindex, stripdq;
-{
- size_t slen;
- char *send;
- int j, i, t;
- unsigned char c;
- char *temp, *ret; /* The new string we return. */
- int pass_next, backquote, si; /* State variables for the machine. */
- int dquote;
- DECLARE_MBSTATE;
-
- slen = strlen (string + *sindex) + *sindex;
- send = string + slen;
-
- pass_next = backquote = dquote = 0;
- temp = (char *)xmalloc (1 + slen - *sindex);
-
- j = 0;
- i = *sindex;
- while (c = string[i])
- {
- /* Process a character that was quoted by a backslash. */
- if (pass_next)
- {
- /* XXX - take another look at this in light of Interp 221 */
- /* Posix.2 sez:
-
- ``The backslash shall retain its special meaning as an escape
- character only when followed by one of the characters:
- $ ` " \ <newline>''.
-
- If STRIPDQ is zero, we handle the double quotes here and let
- expand_word_internal handle the rest. If STRIPDQ is non-zero,
- we have already been through one round of backslash stripping,
- and want to strip these backslashes only if DQUOTE is non-zero,
- indicating that we are inside an embedded double-quoted string. */
-
- /* If we are in an embedded quoted string, then don't strip
- backslashes before characters for which the backslash
- retains its special meaning, but remove backslashes in
- front of other characters. If we are not in an
- embedded quoted string, don't strip backslashes at all.
- This mess is necessary because the string was already
- surrounded by double quotes (and sh has some really weird
- quoting rules).
- The returned string will be run through expansion as if
- it were double-quoted. */
- if ((stripdq == 0 && c != '"') ||
- (stripdq && ((dquote && (sh_syntaxtab[c] & CBSDQUOTE)) || dquote == 0)))
- temp[j++] = '\\';
- pass_next = 0;
-
-add_one_character:
- COPY_CHAR_I (temp, j, string, send, i);
- continue;
- }
-
- /* A backslash protects the next character. The code just above
- handles preserving the backslash in front of any character but
- a double quote. */
- if (c == '\\')
- {
- pass_next++;
- i++;
- continue;
- }
-
- /* Inside backquotes, ``the portion of the quoted string from the
- initial backquote and the characters up to the next backquote
- that is not preceded by a backslash, having escape characters
- removed, defines that command''. */
- if (backquote)
- {
- if (c == '`')
- backquote = 0;
- temp[j++] = c;
- i++;
- continue;
- }
-
- if (c == '`')
- {
- temp[j++] = c;
- backquote++;
- i++;
- continue;
- }
-
- /* Pass everything between `$(' and the matching `)' or a quoted
- ${ ... } pair through according to the Posix.2 specification. */
- if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE)))
- {
- int free_ret = 1;
-
- si = i + 2;
- if (string[i + 1] == LPAREN)
- ret = extract_command_subst (string, &si, 0);
- else
- ret = extract_dollar_brace_string (string, &si, Q_DOUBLE_QUOTES, 0);
-
- temp[j++] = '$';
- temp[j++] = string[i + 1];
-
- /* Just paranoia; ret will not be 0 unless no_longjmp_on_fatal_error
- is set. */
- if (ret == 0 && no_longjmp_on_fatal_error)
- {
- free_ret = 0;
- ret = string + i + 2;
- }
-
- for (t = 0; ret[t]; t++, j++)
- temp[j] = ret[t];
- temp[j] = string[si];
-
- if (string[si])
- {
- j++;
- i = si + 1;
- }
- else
- i = si;
-
- if (free_ret)
- free (ret);
- continue;
- }
-
- /* Add any character but a double quote to the quoted string we're
- accumulating. */
- if (c != '"')
- goto add_one_character;
-
- /* c == '"' */
- if (stripdq)
- {
- dquote ^= 1;
- i++;
- continue;
- }
-
- break;
- }
- temp[j] = '\0';
-
- /* Point to after the closing quote. */
- if (c)
- i++;
- *sindex = i;
-
- return (temp);
-}
-
-/* This should really be another option to string_extract_double_quoted. */
-static int
-skip_double_quoted (string, slen, sind)
- char *string;
- size_t slen;
- int sind;
-{
- int c, i;
- char *ret;
- int pass_next, backquote, si;
- DECLARE_MBSTATE;
-
- pass_next = backquote = 0;
- i = sind;
- while (c = string[i])
- {
- if (pass_next)
- {
- pass_next = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '\\')
- {
- pass_next++;
- i++;
- continue;
- }
- else if (backquote)
- {
- if (c == '`')
- backquote = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '`')
- {
- backquote++;
- i++;
- continue;
- }
- else if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE)))
- {
- si = i + 2;
- if (string[i + 1] == LPAREN)
- ret = extract_command_subst (string, &si, SX_NOALLOC);
- else
- ret = extract_dollar_brace_string (string, &si, Q_DOUBLE_QUOTES, SX_NOALLOC);
-
- i = si + 1;
- continue;
- }
- else if (c != '"')
- {
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else
- break;
- }
-
- if (c)
- i++;
-
- return (i);
-}
-
-/* Extract the contents of STRING as if it is enclosed in single quotes.
- SINDEX, when passed in, is the offset of the character immediately
- following the opening single quote; on exit, SINDEX is left pointing after
- the closing single quote. */
-static inline char *
-string_extract_single_quoted (string, sindex)
- char *string;
- int *sindex;
-{
- register int i;
- size_t slen;
- char *t;
- DECLARE_MBSTATE;
-
- /* Don't need slen for ADVANCE_CHAR unless multibyte chars possible. */
- slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0;
- i = *sindex;
- while (string[i] && string[i] != '\'')
- ADVANCE_CHAR (string, slen, i);
-
- t = substring (string, *sindex, i);
-
- if (string[i])
- i++;
- *sindex = i;
-
- return (t);
-}
-
-static inline int
-skip_single_quoted (string, slen, sind)
- const char *string;
- size_t slen;
- int sind;
-{
- register int c;
- DECLARE_MBSTATE;
-
- c = sind;
- while (string[c] && string[c] != '\'')
- ADVANCE_CHAR (string, slen, c);
-
- if (string[c])
- c++;
- return c;
-}
-
-/* Just like string_extract, but doesn't hack backslashes or any of
- that other stuff. Obeys CTLESC quoting. Used to do splitting on $IFS. */
-static char *
-string_extract_verbatim (string, slen, sindex, charlist, flags)
- char *string;
- size_t slen;
- int *sindex;
- char *charlist;
- int flags;
-{
- register int i;
-#if defined (HANDLE_MULTIBYTE)
- size_t clen;
- wchar_t *wcharlist;
-#endif
- int c;
- char *temp;
- DECLARE_MBSTATE;
-
- if (charlist[0] == '\'' && charlist[1] == '\0')
- {
- temp = string_extract_single_quoted (string, sindex);
- --*sindex; /* leave *sindex at separator character */
- return temp;
- }
-
- i = *sindex;
-#if 0
- /* See how the MBLEN and ADVANCE_CHAR macros work to understand why we need
- this only if MB_CUR_MAX > 1. */
- slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 1;
-#endif
-#if defined (HANDLE_MULTIBYTE)
- clen = strlen (charlist);
- wcharlist = 0;
-#endif
- while (c = string[i])
- {
-#if defined (HANDLE_MULTIBYTE)
- size_t mblength;
-#endif
- if ((flags & SX_NOCTLESC) == 0 && c == CTLESC)
- {
- i += 2;
- continue;
- }
- /* Even if flags contains SX_NOCTLESC, we let CTLESC quoting CTLNUL
- through, to protect the CTLNULs from later calls to
- remove_quoted_nulls. */
- else if ((flags & SX_NOESCCTLNUL) == 0 && c == CTLESC && string[i+1] == CTLNUL)
- {
- i += 2;
- continue;
- }
-
-#if defined (HANDLE_MULTIBYTE)
- mblength = MBLEN (string + i, slen - i);
- if (mblength > 1)
- {
- wchar_t wc;
- mblength = mbtowc (&wc, string + i, slen - i);
- if (MB_INVALIDCH (mblength))
- {
- if (MEMBER (c, charlist))
- break;
- }
- else
- {
- if (wcharlist == 0)
- {
- size_t len;
- len = mbstowcs (wcharlist, charlist, 0);
- if (len == -1)
- len = 0;
- wcharlist = (wchar_t *)xmalloc (sizeof (wchar_t) * (len + 1));
- mbstowcs (wcharlist, charlist, len + 1);
- }
-
- if (wcschr (wcharlist, wc))
- break;
- }
- }
- else
-#endif
- if (MEMBER (c, charlist))
- break;
-
- ADVANCE_CHAR (string, slen, i);
- }
-
-#if defined (HANDLE_MULTIBYTE)
- FREE (wcharlist);
-#endif
-
- temp = substring (string, *sindex, i);
- *sindex = i;
-
- return (temp);
-}
-
-/* Extract the $( construct in STRING, and return a new string.
- Start extracting at (SINDEX) as if we had just seen "$(".
- Make (SINDEX) get the position of the matching ")". )
- XFLAGS is additional flags to pass to other extraction functions. */
-char *
-extract_command_subst (string, sindex, xflags)
- char *string;
- int *sindex;
- int xflags;
-{
- if (string[*sindex] == LPAREN)
- return (extract_delimited_string (string, sindex, "$(", "(", ")", xflags|SX_COMMAND)); /*)*/
- else
- {
- xflags |= (no_longjmp_on_fatal_error ? SX_NOLONGJMP : 0);
- return (xparse_dolparen (string, string+*sindex, sindex, xflags));
- }
-}
-
-/* Extract the $[ construct in STRING, and return a new string. (])
- Start extracting at (SINDEX) as if we had just seen "$[".
- Make (SINDEX) get the position of the matching "]". */
-char *
-extract_arithmetic_subst (string, sindex)
- char *string;
- int *sindex;
-{
- return (extract_delimited_string (string, sindex, "$[", "[", "]", 0)); /*]*/
-}
-
-#if defined (PROCESS_SUBSTITUTION)
-/* Extract the <( or >( construct in STRING, and return a new string.
- Start extracting at (SINDEX) as if we had just seen "<(".
- Make (SINDEX) get the position of the matching ")". */ /*))*/
-char *
-extract_process_subst (string, starter, sindex)
- char *string;
- char *starter;
- int *sindex;
-{
- return (extract_delimited_string (string, sindex, starter, "(", ")", SX_COMMAND));
-}
-#endif /* PROCESS_SUBSTITUTION */
-
-#if defined (ARRAY_VARS)
-/* This can be fooled by unquoted right parens in the passed string. If
- each caller verifies that the last character in STRING is a right paren,
- we don't even need to call extract_delimited_string. */
-char *
-extract_array_assignment_list (string, sindex)
- char *string;
- int *sindex;
-{
- int slen;
- char *ret;
-
- slen = strlen (string); /* ( */
- if (string[slen - 1] == ')')
- {
- ret = substring (string, *sindex, slen - 1);
- *sindex = slen - 1;
- return ret;
- }
- return 0;
-}
-#endif
-
-/* Extract and create a new string from the contents of STRING, a
- character string delimited with OPENER and CLOSER. SINDEX is
- the address of an int describing the current offset in STRING;
- it should point to just after the first OPENER found. On exit,
- SINDEX gets the position of the last character of the matching CLOSER.
- If OPENER is more than a single character, ALT_OPENER, if non-null,
- contains a character string that can also match CLOSER and thus
- needs to be skipped. */
-static char *
-extract_delimited_string (string, sindex, opener, alt_opener, closer, flags)
- char *string;
- int *sindex;
- char *opener, *alt_opener, *closer;
- int flags;
-{
- int i, c, si;
- size_t slen;
- char *t, *result;
- int pass_character, nesting_level, in_comment;
- int len_closer, len_opener, len_alt_opener;
- DECLARE_MBSTATE;
-
- slen = strlen (string + *sindex) + *sindex;
- len_opener = STRLEN (opener);
- len_alt_opener = STRLEN (alt_opener);
- len_closer = STRLEN (closer);
-
- pass_character = in_comment = 0;
-
- nesting_level = 1;
- i = *sindex;
-
- while (nesting_level)
- {
- c = string[i];
-
- if (c == 0)
- break;
-
- if (in_comment)
- {
- if (c == '\n')
- in_comment = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
-
- if (pass_character) /* previous char was backslash */
- {
- pass_character = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
-
- /* Not exactly right yet; should handle shell metacharacters and
- multibyte characters, too. See COMMENT_BEGIN define in parse.y */
- if ((flags & SX_COMMAND) && c == '#' && (i == 0 || string[i - 1] == '\n' || shellblank (string[i - 1])))
- {
- in_comment = 1;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
-
- if (c == CTLESC || c == '\\')
- {
- pass_character++;
- i++;
- continue;
- }
-
- /* Process a nested command substitution, but only if we're parsing an
- arithmetic substitution. */
- if ((flags & SX_COMMAND) && string[i] == '$' && string[i+1] == LPAREN)
- {
- si = i + 2;
- t = extract_command_subst (string, &si, flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Process a nested OPENER. */
- if (STREQN (string + i, opener, len_opener))
- {
- si = i + len_opener;
- t = extract_delimited_string (string, &si, opener, alt_opener, closer, flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Process a nested ALT_OPENER */
- if (len_alt_opener && STREQN (string + i, alt_opener, len_alt_opener))
- {
- si = i + len_alt_opener;
- t = extract_delimited_string (string, &si, alt_opener, alt_opener, closer, flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* If the current substring terminates the delimited string, decrement
- the nesting level. */
- if (STREQN (string + i, closer, len_closer))
- {
- i += len_closer - 1; /* move to last byte of the closer */
- nesting_level--;
- if (nesting_level == 0)
- break;
- }
-
- /* Pass old-style command substitution through verbatim. */
- if (c == '`')
- {
- si = i + 1;
- t = string_extract (string, &si, "`", flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Pass single-quoted and double-quoted strings through verbatim. */
- if (c == '\'' || c == '"')
- {
- si = i + 1;
- i = (c == '\'') ? skip_single_quoted (string, slen, si)
- : skip_double_quoted (string, slen, si);
- continue;
- }
-
- /* move past this character, which was not special. */
- ADVANCE_CHAR (string, slen, i);
- }
-
- if (c == 0 && nesting_level)
- {
- if (no_longjmp_on_fatal_error == 0)
- {
- report_error (_("bad substitution: no closing `%s' in %s"), closer, string);
- last_command_exit_value = EXECUTION_FAILURE;
- exp_jump_to_top_level (DISCARD);
- }
- else
- {
- *sindex = i;
- return (char *)NULL;
- }
- }
-
- si = i - *sindex - len_closer + 1;
- if (flags & SX_NOALLOC)
- result = (char *)NULL;
- else
- {
- result = (char *)xmalloc (1 + si);
- strncpy (result, string + *sindex, si);
- result[si] = '\0';
- }
- *sindex = i;
-
- return (result);
-}
-
-/* Extract a parameter expansion expression within ${ and } from STRING.
- Obey the Posix.2 rules for finding the ending `}': count braces while
- skipping over enclosed quoted strings and command substitutions.
- SINDEX is the address of an int describing the current offset in STRING;
- it should point to just after the first `{' found. On exit, SINDEX
- gets the position of the matching `}'. QUOTED is non-zero if this
- occurs inside double quotes. */
-/* XXX -- this is very similar to extract_delimited_string -- XXX */
-static char *
-extract_dollar_brace_string (string, sindex, quoted, flags)
- char *string;
- int *sindex, quoted, flags;
-{
- register int i, c;
- size_t slen;
- int pass_character, nesting_level, si, dolbrace_state;
- char *result, *t;
- DECLARE_MBSTATE;
-
- pass_character = 0;
- nesting_level = 1;
- slen = strlen (string + *sindex) + *sindex;
-
- /* The handling of dolbrace_state needs to agree with the code in parse.y:
- parse_matched_pair(). The different initial value is to handle the
- case where this function is called to parse the word in
- ${param op word} (SX_WORD). */
- dolbrace_state = (flags & SX_WORD) ? DOLBRACE_WORD : DOLBRACE_PARAM;
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && (flags & SX_POSIXEXP))
- dolbrace_state = DOLBRACE_QUOTE;
-
- i = *sindex;
- while (c = string[i])
- {
- if (pass_character)
- {
- pass_character = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
-
- /* CTLESCs and backslashes quote the next character. */
- if (c == CTLESC || c == '\\')
- {
- pass_character++;
- i++;
- continue;
- }
-
- if (string[i] == '$' && string[i+1] == LBRACE)
- {
- nesting_level++;
- i += 2;
- continue;
- }
-
- if (c == RBRACE)
- {
- nesting_level--;
- if (nesting_level == 0)
- break;
- i++;
- continue;
- }
-
- /* Pass the contents of old-style command substitutions through
- verbatim. */
- if (c == '`')
- {
- si = i + 1;
- t = string_extract (string, &si, "`", flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
- /* Pass the contents of new-style command substitutions and
- arithmetic substitutions through verbatim. */
- if (string[i] == '$' && string[i+1] == LPAREN)
- {
- si = i + 2;
- t = extract_command_subst (string, &si, flags|SX_NOALLOC);
- i = si + 1;
- continue;
- }
-
-#if 0
- /* Pass the contents of single-quoted and double-quoted strings
- through verbatim. */
- if (c == '\'' || c == '"')
- {
- si = i + 1;
- i = (c == '\'') ? skip_single_quoted (string, slen, si)
- : skip_double_quoted (string, slen, si);
- /* skip_XXX_quoted leaves index one past close quote */
- continue;
- }
-#else /* XXX - bash-4.2 */
- /* Pass the contents of double-quoted strings through verbatim. */
- if (c == '"')
- {
- si = i + 1;
- i = skip_double_quoted (string, slen, si);
- /* skip_XXX_quoted leaves index one past close quote */
- continue;
- }
-
- if (c == '\'')
- {
-/*itrace("extract_dollar_brace_string: c == single quote flags = %d quoted = %d dolbrace_state = %d", flags, quoted, dolbrace_state);*/
- if (posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ADVANCE_CHAR (string, slen, i);
- else
- {
- si = i + 1;
- i = skip_single_quoted (string, slen, si);
- }
-
- continue;
- }
-#endif
-
- /* move past this character, which was not special. */
- ADVANCE_CHAR (string, slen, i);
-
- /* This logic must agree with parse.y:parse_matched_pair, since they
- share the same defines. */
- if (dolbrace_state == DOLBRACE_PARAM && c == '%' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && c == '#' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && c == '/' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && c == '^' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && c == ',' && (i - *sindex) > 1)
- dolbrace_state = DOLBRACE_QUOTE;
- else if (dolbrace_state == DOLBRACE_PARAM && strchr ("#%^,~:-=?+/", c) != 0)
- dolbrace_state = DOLBRACE_OP;
- else if (dolbrace_state == DOLBRACE_OP && strchr ("#%^,~:-=?+/", c) == 0)
- dolbrace_state = DOLBRACE_WORD;
- }
-
- if (c == 0 && nesting_level)
- {
- if (no_longjmp_on_fatal_error == 0)
- { /* { */
- report_error (_("bad substitution: no closing `%s' in %s"), "}", string);
- last_command_exit_value = EXECUTION_FAILURE;
- exp_jump_to_top_level (DISCARD);
- }
- else
- {
- *sindex = i;
- return ((char *)NULL);
- }
- }
-
- result = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i);
- *sindex = i;
-
- return (result);
-}
-
-/* Remove backslashes which are quoting backquotes from STRING. Modifies
- STRING, and returns a pointer to it. */
-char *
-de_backslash (string)
- char *string;
-{
- register size_t slen;
- register int i, j, prev_i;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- i = j = 0;
-
- /* Loop copying string[i] to string[j], i >= j. */
- while (i < slen)
- {
- if (string[i] == '\\' && (string[i + 1] == '`' || string[i + 1] == '\\' ||
- string[i + 1] == '$'))
- i++;
- prev_i = i;
- ADVANCE_CHAR (string, slen, i);
- if (j < prev_i)
- do string[j++] = string[prev_i++]; while (prev_i < i);
- else
- j = i;
- }
- string[j] = '\0';
-
- return (string);
-}
-
-#if 0
-/*UNUSED*/
-/* Replace instances of \! in a string with !. */
-void
-unquote_bang (string)
- char *string;
-{
- register int i, j;
- register char *temp;
-
- temp = (char *)xmalloc (1 + strlen (string));
-
- for (i = 0, j = 0; (temp[j] = string[i]); i++, j++)
- {
- if (string[i] == '\\' && string[i + 1] == '!')
- {
- temp[j] = '!';
- i++;
- }
- }
- strcpy (string, temp);
- free (temp);
-}
-#endif
-
-#define CQ_RETURN(x) do { no_longjmp_on_fatal_error = 0; return (x); } while (0)
-
-/* This function assumes s[i] == open; returns with s[ret] == close; used to
- parse array subscripts. FLAGS & 1 means to not attempt to skip over
- matched pairs of quotes or backquotes, or skip word expansions; it is
- intended to be used after expansion has been performed and during final
- assignment parsing (see arrayfunc.c:assign_compound_array_list()). */
-static int
-skip_matched_pair (string, start, open, close, flags)
- const char *string;
- int start, open, close, flags;
-{
- int i, pass_next, backq, si, c, count;
- size_t slen;
- char *temp, *ss;
- DECLARE_MBSTATE;
-
- slen = strlen (string + start) + start;
- no_longjmp_on_fatal_error = 1;
-
- i = start + 1; /* skip over leading bracket */
- count = 1;
- pass_next = backq = 0;
- ss = (char *)string;
- while (c = string[i])
- {
- if (pass_next)
- {
- pass_next = 0;
- if (c == 0)
- CQ_RETURN(i);
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '\\')
- {
- pass_next = 1;
- i++;
- continue;
- }
- else if (backq)
- {
- if (c == '`')
- backq = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if ((flags & 1) == 0 && c == '`')
- {
- backq = 1;
- i++;
- continue;
- }
- else if ((flags & 1) == 0 && c == open)
- {
- count++;
- i++;
- continue;
- }
- else if (c == close)
- {
- count--;
- if (count == 0)
- break;
- i++;
- continue;
- }
- else if ((flags & 1) == 0 && (c == '\'' || c == '"'))
- {
- i = (c == '\'') ? skip_single_quoted (ss, slen, ++i)
- : skip_double_quoted (ss, slen, ++i);
- /* no increment, the skip functions increment past the closing quote. */
- }
- else if ((flags&1) == 0 && c == '$' && (string[i+1] == LPAREN || string[i+1] == LBRACE))
- {
- si = i + 2;
- if (string[si] == '\0')
- CQ_RETURN(si);
-
- if (string[i+1] == LPAREN)
- temp = extract_delimited_string (ss, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */
- else
- temp = extract_dollar_brace_string (ss, &si, 0, SX_NOALLOC);
- i = si;
- if (string[i] == '\0') /* don't increment i past EOS in loop */
- break;
- i++;
- continue;
- }
- else
- ADVANCE_CHAR (string, slen, i);
- }
-
- CQ_RETURN(i);
-}
-
-#if defined (ARRAY_VARS)
-int
-skipsubscript (string, start, flags)
- const char *string;
- int start, flags;
-{
- return (skip_matched_pair (string, start, '[', ']', flags));
-}
-#endif
-
-/* Skip characters in STRING until we find a character in DELIMS, and return
- the index of that character. START is the index into string at which we
- begin. This is similar in spirit to strpbrk, but it returns an index into
- STRING and takes a starting index. This little piece of code knows quite
- a lot of shell syntax. It's very similar to skip_double_quoted and other
- functions of that ilk. */
-int
-skip_to_delim (string, start, delims, flags)
- char *string;
- int start;
- char *delims;
- int flags;
-{
- int i, pass_next, backq, si, c, invert, skipquote, skipcmd;
- size_t slen;
- char *temp, open[3];
- DECLARE_MBSTATE;
-
- slen = strlen (string + start) + start;
- if (flags & SD_NOJMP)
- no_longjmp_on_fatal_error = 1;
- invert = (flags & SD_INVERT);
- skipcmd = (flags & SD_NOSKIPCMD) == 0;
-
- i = start;
- pass_next = backq = 0;
- while (c = string[i])
- {
- /* If this is non-zero, we should not let quote characters be delimiters
- and the current character is a single or double quote. We should not
- test whether or not it's a delimiter until after we skip single- or
- double-quoted strings. */
- skipquote = ((flags & SD_NOQUOTEDELIM) && (c == '\'' || c =='"'));
- if (pass_next)
- {
- pass_next = 0;
- if (c == 0)
- CQ_RETURN(i);
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '\\')
- {
- pass_next = 1;
- i++;
- continue;
- }
- else if (backq)
- {
- if (c == '`')
- backq = 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '`')
- {
- backq = 1;
- i++;
- continue;
- }
- else if (skipquote == 0 && invert == 0 && member (c, delims))
- break;
- else if (c == '\'' || c == '"')
- {
- i = (c == '\'') ? skip_single_quoted (string, slen, ++i)
- : skip_double_quoted (string, slen, ++i);
- /* no increment, the skip functions increment past the closing quote. */
- }
- else if (c == '$' && ((skipcmd && string[i+1] == LPAREN) || string[i+1] == LBRACE))
- {
- si = i + 2;
- if (string[si] == '\0')
- CQ_RETURN(si);
-
- if (string[i+1] == LPAREN)
- temp = extract_delimited_string (string, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */
- else
- temp = extract_dollar_brace_string (string, &si, 0, SX_NOALLOC);
- i = si;
- if (string[i] == '\0') /* don't increment i past EOS in loop */
- break;
- i++;
- continue;
- }
-#if defined (PROCESS_SUBSTITUTION)
- else if (skipcmd && (c == '<' || c == '>') && string[i+1] == LPAREN)
- {
- si = i + 2;
- if (string[si] == '\0')
- CQ_RETURN(si);
- temp = extract_process_subst (string, (c == '<') ? "<(" : ">(", &si);
- i = si;
- if (string[i] == '\0')
- break;
- i++;
- continue;
- }
-#endif /* PROCESS_SUBSTITUTION */
-#if defined (EXTENDED_GLOB)
- else if ((flags & SD_EXTGLOB) && extended_glob && string[i+1] == LPAREN && member (c, "?*+!@"))
- {
- si = i + 2;
- if (string[si] == '\0')
- CQ_RETURN(si);
-
- open[0] = c;
- open[1] = LPAREN;
- open[2] = '\0';
- temp = extract_delimited_string (string, &si, open, "(", ")", SX_NOALLOC); /* ) */
-
- i = si;
- if (string[i] == '\0') /* don't increment i past EOS in loop */
- break;
- i++;
- continue;
- }
-#endif
- else if ((skipquote || invert) && (member (c, delims) == 0))
- break;
- else
- ADVANCE_CHAR (string, slen, i);
- }
-
- CQ_RETURN(i);
-}
-
-#if defined (READLINE)
-/* Return 1 if the portion of STRING ending at EINDEX is quoted (there is
- an unclosed quoted string), or if the character at EINDEX is quoted
- by a backslash. NO_LONGJMP_ON_FATAL_ERROR is used to flag that the various
- single and double-quoted string parsing functions should not return an
- error if there are unclosed quotes or braces. The characters that this
- recognizes need to be the same as the contents of
- rl_completer_quote_characters. */
-
-int
-char_is_quoted (string, eindex)
- char *string;
- int eindex;
-{
- int i, pass_next, c;
- size_t slen;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- no_longjmp_on_fatal_error = 1;
- i = pass_next = 0;
- while (i <= eindex)
- {
- c = string[i];
-
- if (pass_next)
- {
- pass_next = 0;
- if (i >= eindex) /* XXX was if (i >= eindex - 1) */
- CQ_RETURN(1);
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (c == '\\')
- {
- pass_next = 1;
- i++;
- continue;
- }
- else if (c == '\'' || c == '"')
- {
- i = (c == '\'') ? skip_single_quoted (string, slen, ++i)
- : skip_double_quoted (string, slen, ++i);
- if (i > eindex)
- CQ_RETURN(1);
- /* no increment, the skip_xxx functions go one past end */
- }
- else
- ADVANCE_CHAR (string, slen, i);
- }
-
- CQ_RETURN(0);
-}
-
-int
-unclosed_pair (string, eindex, openstr)
- char *string;
- int eindex;
- char *openstr;
-{
- int i, pass_next, openc, olen;
- size_t slen;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- olen = strlen (openstr);
- i = pass_next = openc = 0;
- while (i <= eindex)
- {
- if (pass_next)
- {
- pass_next = 0;
- if (i >= eindex) /* XXX was if (i >= eindex - 1) */
- return 0;
- ADVANCE_CHAR (string, slen, i);
- continue;
- }
- else if (string[i] == '\\')
- {
- pass_next = 1;
- i++;
- continue;
- }
- else if (STREQN (string + i, openstr, olen))
- {
- openc = 1 - openc;
- i += olen;
- }
- else if (string[i] == '\'' || string[i] == '"')
- {
- i = (string[i] == '\'') ? skip_single_quoted (string, slen, i)
- : skip_double_quoted (string, slen, i);
- if (i > eindex)
- return 0;
- }
- else
- ADVANCE_CHAR (string, slen, i);
- }
- return (openc);
-}
-
-/* Split STRING (length SLEN) at DELIMS, and return a WORD_LIST with the
- individual words. If DELIMS is NULL, the current value of $IFS is used
- to split the string, and the function follows the shell field splitting
- rules. SENTINEL is an index to look for. NWP, if non-NULL,
- gets the number of words in the returned list. CWP, if non-NULL, gets
- the index of the word containing SENTINEL. Non-whitespace chars in
- DELIMS delimit separate fields. */
-WORD_LIST *
-split_at_delims (string, slen, delims, sentinel, flags, nwp, cwp)
- char *string;
- int slen;
- char *delims;
- int sentinel, flags;
- int *nwp, *cwp;
-{
- int ts, te, i, nw, cw, ifs_split, dflags;
- char *token, *d, *d2;
- WORD_LIST *ret, *tl;
-
- if (string == 0 || *string == '\0')
- {
- if (nwp)
- *nwp = 0;
- if (cwp)
- *cwp = 0;
- return ((WORD_LIST *)NULL);
- }
-
- d = (delims == 0) ? ifs_value : delims;
- ifs_split = delims == 0;
-
- /* Make d2 the non-whitespace characters in delims */
- d2 = 0;
- if (delims)
- {
- size_t slength;
-#if defined (HANDLE_MULTIBYTE)
- size_t mblength = 1;
-#endif
- DECLARE_MBSTATE;
-
- slength = strlen (delims);
- d2 = (char *)xmalloc (slength + 1);
- i = ts = 0;
- while (delims[i])
- {
-#if defined (HANDLE_MULTIBYTE)
- mbstate_t state_bak;
- state_bak = state;
- mblength = MBRLEN (delims + i, slength, &state);
- if (MB_INVALIDCH (mblength))
- state = state_bak;
- else if (mblength > 1)
- {
- memcpy (d2 + ts, delims + i, mblength);
- ts += mblength;
- i += mblength;
- slength -= mblength;
- continue;
- }
-#endif
- if (whitespace (delims[i]) == 0)
- d2[ts++] = delims[i];
-
- i++;
- slength--;
- }
- d2[ts] = '\0';
- }
-
- ret = (WORD_LIST *)NULL;
-
- /* Remove sequences of whitespace characters at the start of the string, as
- long as those characters are delimiters. */
- for (i = 0; member (string[i], d) && spctabnl (string[i]); i++)
- ;
- if (string[i] == '\0')
- return (ret);
-
- ts = i;
- nw = 0;
- cw = -1;
- dflags = flags|SD_NOJMP;
- while (1)
- {
- te = skip_to_delim (string, ts, d, dflags);
-
- /* If we have a non-whitespace delimiter character, use it to make a
- separate field. This is just about what $IFS splitting does and
- is closer to the behavior of the shell parser. */
- if (ts == te && d2 && member (string[ts], d2))
- {
- te = ts + 1;
- /* If we're using IFS splitting, the non-whitespace delimiter char
- and any additional IFS whitespace delimits a field. */
- if (ifs_split)
- while (member (string[te], d) && spctabnl (string[te]))
- te++;
- else
- while (member (string[te], d2))
- te++;
- }
-
- token = substring (string, ts, te);
-
- ret = add_string_to_list (token, ret);
- free (token);
- nw++;
-
- if (sentinel >= ts && sentinel <= te)
- cw = nw;
-
- /* If the cursor is at whitespace just before word start, set the
- sentinel word to the current word. */
- if (cwp && cw == -1 && sentinel == ts-1)
- cw = nw;
-
- /* If the cursor is at whitespace between two words, make a new, empty
- word, add it before (well, after, since the list is in reverse order)
- the word we just added, and set the current word to that one. */
- if (cwp && cw == -1 && sentinel < ts)
- {
- tl = make_word_list (make_word (""), ret->next);
- ret->next = tl;
- cw = nw;
- nw++;
- }
-
- if (string[te] == 0)
- break;
-
- i = te;
- while (member (string[i], d) && (ifs_split || spctabnl(string[i])))
- i++;
-
- if (string[i])
- ts = i;
- else
- break;
- }
-
- /* Special case for SENTINEL at the end of STRING. If we haven't found
- the word containing SENTINEL yet, and the index we're looking for is at
- the end of STRING (or past the end of the previously-found token,
- possible if the end of the line is composed solely of IFS whitespace)
- add an additional null argument and set the current word pointer to that. */
- if (cwp && cw == -1 && (sentinel >= slen || sentinel >= te))
- {
- if (whitespace (string[sentinel - 1]))
- {
- token = "";
- ret = add_string_to_list (token, ret);
- nw++;
- }
- cw = nw;
- }
-
- if (nwp)
- *nwp = nw;
- if (cwp)
- *cwp = cw;
-
- return (REVERSE_LIST (ret, WORD_LIST *));
-}
-#endif /* READLINE */
-
-#if 0
-/* UNUSED */
-/* Extract the name of the variable to bind to from the assignment string. */
-char *
-assignment_name (string)
- char *string;
-{
- int offset;
- char *temp;
-
- offset = assignment (string, 0);
- if (offset == 0)
- return (char *)NULL;
- temp = substring (string, 0, offset);
- return (temp);
-}
-#endif
-
-/* **************************************************************** */
-/* */
-/* Functions to convert strings to WORD_LISTs and vice versa */
-/* */
-/* **************************************************************** */
-
-/* Return a single string of all the words in LIST. SEP is the separator
- to put between individual elements of LIST in the output string. */
-char *
-string_list_internal (list, sep)
- WORD_LIST *list;
- char *sep;
-{
- register WORD_LIST *t;
- char *result, *r;
- int word_len, sep_len, result_size;
-
- if (list == 0)
- return ((char *)NULL);
-
- /* Short-circuit quickly if we don't need to separate anything. */
- if (list->next == 0)
- return (savestring (list->word->word));
-
- /* This is nearly always called with either sep[0] == 0 or sep[1] == 0. */
- sep_len = STRLEN (sep);
- result_size = 0;
-
- for (t = list; t; t = t->next)
- {
- if (t != list)
- result_size += sep_len;
- result_size += strlen (t->word->word);
- }
-
- r = result = (char *)xmalloc (result_size + 1);
-
- for (t = list; t; t = t->next)
- {
- if (t != list && sep_len)
- {
- if (sep_len > 1)
- {
- FASTCOPY (sep, r, sep_len);
- r += sep_len;
- }
- else
- *r++ = sep[0];
- }
-
- word_len = strlen (t->word->word);
- FASTCOPY (t->word->word, r, word_len);
- r += word_len;
- }
-
- *r = '\0';
- return (result);
-}
-
-/* Return a single string of all the words present in LIST, separating
- each word with a space. */
-char *
-string_list (list)
- WORD_LIST *list;
-{
- return (string_list_internal (list, " "));
-}
-
-/* An external interface that can be used by the rest of the shell to
- obtain a string containing the first character in $IFS. Handles all
- the multibyte complications. If LENP is non-null, it is set to the
- length of the returned string. */
-char *
-ifs_firstchar (lenp)
- int *lenp;
-{
- char *ret;
- int len;
-
- ret = xmalloc (MB_LEN_MAX + 1);
-#if defined (HANDLE_MULTIBYTE)
- if (ifs_firstc_len == 1)
- {
- ret[0] = ifs_firstc[0];
- ret[1] = '\0';
- len = ret[0] ? 1 : 0;
- }
- else
- {
- memcpy (ret, ifs_firstc, ifs_firstc_len);
- ret[len = ifs_firstc_len] = '\0';
- }
-#else
- ret[0] = ifs_firstc;
- ret[1] = '\0';
- len = ret[0] ? 0 : 1;
-#endif
-
- if (lenp)
- *lenp = len;
-
- return ret;
-}
-
-/* Return a single string of all the words present in LIST, obeying the
- quoting rules for "$*", to wit: (P1003.2, draft 11, 3.5.2) "If the
- expansion [of $*] appears within a double quoted string, it expands
- to a single field with the value of each parameter separated by the
- first character of the IFS variable, or by a <space> if IFS is unset." */
-char *
-string_list_dollar_star (list)
- WORD_LIST *list;
-{
- char *ret;
-#if defined (HANDLE_MULTIBYTE)
-# if defined (__GNUC__)
- char sep[MB_CUR_MAX + 1];
-# else
- char *sep = 0;
-# endif
-#else
- char sep[2];
-#endif
-
-#if defined (HANDLE_MULTIBYTE)
-# if !defined (__GNUC__)
- sep = (char *)xmalloc (MB_CUR_MAX + 1);
-# endif /* !__GNUC__ */
- if (ifs_firstc_len == 1)
- {
- sep[0] = ifs_firstc[0];
- sep[1] = '\0';
- }
- else
- {
- memcpy (sep, ifs_firstc, ifs_firstc_len);
- sep[ifs_firstc_len] = '\0';
- }
-#else
- sep[0] = ifs_firstc;
- sep[1] = '\0';
-#endif
-
- ret = string_list_internal (list, sep);
-#if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__)
- free (sep);
-#endif
- return ret;
-}
-
-/* Turn $@ into a string. If (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- is non-zero, the $@ appears within double quotes, and we should quote
- the list before converting it into a string. If IFS is unset, and the
- word is not quoted, we just need to quote CTLESC and CTLNUL characters
- in the words in the list, because the default value of $IFS is
- <space><tab><newline>, IFS characters in the words in the list should
- also be split. If IFS is null, and the word is not quoted, we need
- to quote the words in the list to preserve the positional parameters
- exactly. */
-char *
-string_list_dollar_at (list, quoted)
- WORD_LIST *list;
- int quoted;
-{
- char *ifs, *ret;
-#if defined (HANDLE_MULTIBYTE)
-# if defined (__GNUC__)
- char sep[MB_CUR_MAX + 1];
-# else
- char *sep = 0;
-# endif /* !__GNUC__ */
-#else
- char sep[2];
-#endif
- WORD_LIST *tlist;
-
- /* XXX this could just be ifs = ifs_value; */
- ifs = ifs_var ? value_cell (ifs_var) : (char *)0;
-
-#if defined (HANDLE_MULTIBYTE)
-# if !defined (__GNUC__)
- sep = (char *)xmalloc (MB_CUR_MAX + 1);
-# endif /* !__GNUC__ */
- if (ifs && *ifs)
- {
- if (ifs_firstc_len == 1)
- {
- sep[0] = ifs_firstc[0];
- sep[1] = '\0';
- }
- else
- {
- memcpy (sep, ifs_firstc, ifs_firstc_len);
- sep[ifs_firstc_len] = '\0';
- }
- }
- else
- {
- sep[0] = ' ';
- sep[1] = '\0';
- }
-#else
- sep[0] = (ifs == 0 || *ifs == 0) ? ' ' : *ifs;
- sep[1] = '\0';
-#endif
-
- /* XXX -- why call quote_list if ifs == 0? we can get away without doing
- it now that quote_escapes quotes spaces */
- tlist = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE))
- ? quote_list (list)
- : list_quote_escapes (list);
-
- ret = string_list_internal (tlist, sep);
-#if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__)
- free (sep);
-#endif
- return ret;
-}
-
-/* Turn the positional paramters into a string, understanding quoting and
- the various subtleties of using the first character of $IFS as the
- separator. Calls string_list_dollar_at, string_list_dollar_star, and
- string_list as appropriate. */
-char *
-string_list_pos_params (pchar, list, quoted)
- int pchar;
- WORD_LIST *list;
- int quoted;
-{
- char *ret;
- WORD_LIST *tlist;
-
- if (pchar == '*' && (quoted & Q_DOUBLE_QUOTES))
- {
- tlist = quote_list (list);
- word_list_remove_quoted_nulls (tlist);
- ret = string_list_dollar_star (tlist);
- }
- else if (pchar == '*' && (quoted & Q_HERE_DOCUMENT))
- {
- tlist = quote_list (list);
- word_list_remove_quoted_nulls (tlist);
- ret = string_list (tlist);
- }
- else if (pchar == '*')
- {
- /* Even when unquoted, string_list_dollar_star does the right thing
- making sure that the first character of $IFS is used as the
- separator. */
- ret = string_list_dollar_star (list);
- }
- else if (pchar == '@' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- /* We use string_list_dollar_at, but only if the string is quoted, since
- that quotes the escapes if it's not, which we don't want. We could
- use string_list (the old code did), but that doesn't do the right
- thing if the first character of $IFS is not a space. We use
- string_list_dollar_star if the string is unquoted so we make sure that
- the elements of $@ are separated by the first character of $IFS for
- later splitting. */
- ret = string_list_dollar_at (list, quoted);
- else if (pchar == '@')
- ret = string_list_dollar_star (list);
- else
- ret = string_list ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? quote_list (list) : list);
-
- return ret;
-}
-
-/* Return the list of words present in STRING. Separate the string into
- words at any of the characters found in SEPARATORS. If QUOTED is
- non-zero then word in the list will have its quoted flag set, otherwise
- the quoted flag is left as make_word () deemed fit.
-
- This obeys the P1003.2 word splitting semantics. If `separators' is
- exactly <space><tab><newline>, then the splitting algorithm is that of
- the Bourne shell, which treats any sequence of characters from `separators'
- as a delimiter. If IFS is unset, which results in `separators' being set
- to "", no splitting occurs. If separators has some other value, the
- following rules are applied (`IFS white space' means zero or more
- occurrences of <space>, <tab>, or <newline>, as long as those characters
- are in `separators'):
-
- 1) IFS white space is ignored at the start and the end of the
- string.
- 2) Each occurrence of a character in `separators' that is not
- IFS white space, along with any adjacent occurrences of
- IFS white space delimits a field.
- 3) Any nonzero-length sequence of IFS white space delimits a field.
- */
-
-/* BEWARE! list_string strips null arguments. Don't call it twice and
- expect to have "" preserved! */
-
-/* This performs word splitting and quoted null character removal on
- STRING. */
-#define issep(c) \
- (((separators)[0]) ? ((separators)[1] ? isifs(c) \
- : (c) == (separators)[0]) \
- : 0)
-
-WORD_LIST *
-list_string (string, separators, quoted)
- register char *string, *separators;
- int quoted;
-{
- WORD_LIST *result;
- WORD_DESC *t;
- char *current_word, *s;
- int sindex, sh_style_split, whitesep, xflags;
- size_t slen;
-
- if (!string || !*string)
- return ((WORD_LIST *)NULL);
-
- sh_style_split = separators && separators[0] == ' ' &&
- separators[1] == '\t' &&
- separators[2] == '\n' &&
- separators[3] == '\0';
- for (xflags = 0, s = ifs_value; s && *s; s++)
- {
- if (*s == CTLESC) xflags |= SX_NOCTLESC;
- else if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL;
- }
-
- slen = 0;
- /* Remove sequences of whitespace at the beginning of STRING, as
- long as those characters appear in IFS. Do not do this if
- STRING is quoted or if there are no separator characters. */
- if (!quoted || !separators || !*separators)
- {
- for (s = string; *s && spctabnl (*s) && issep (*s); s++);
-
- if (!*s)
- return ((WORD_LIST *)NULL);
-
- string = s;
- }
-
- /* OK, now STRING points to a word that does not begin with white space.
- The splitting algorithm is:
- extract a word, stopping at a separator
- skip sequences of spc, tab, or nl as long as they are separators
- This obeys the field splitting rules in Posix.2. */
- slen = (MB_CUR_MAX > 1) ? strlen (string) : 1;
- for (result = (WORD_LIST *)NULL, sindex = 0; string[sindex]; )
- {
- /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim
- unless multibyte chars are possible. */
- current_word = string_extract_verbatim (string, slen, &sindex, separators, xflags);
- if (current_word == 0)
- break;
-
- /* If we have a quoted empty string, add a quoted null argument. We
- want to preserve the quoted null character iff this is a quoted
- empty string; otherwise the quoted null characters are removed
- below. */
- if (QUOTED_NULL (current_word))
- {
- t = alloc_word_desc ();
- t->word = make_quoted_char ('\0');
- t->flags |= W_QUOTED|W_HASQUOTEDNULL;
- result = make_word_list (t, result);
- }
- else if (current_word[0] != '\0')
- {
- /* If we have something, then add it regardless. However,
- perform quoted null character removal on the current word. */
- remove_quoted_nulls (current_word);
- result = add_string_to_list (current_word, result);
- result->word->flags &= ~W_HASQUOTEDNULL; /* just to be sure */
- if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- result->word->flags |= W_QUOTED;
- }
-
- /* If we're not doing sequences of separators in the traditional
- Bourne shell style, then add a quoted null argument. */
- else if (!sh_style_split && !spctabnl (string[sindex]))
- {
- t = alloc_word_desc ();
- t->word = make_quoted_char ('\0');
- t->flags |= W_QUOTED|W_HASQUOTEDNULL;
- result = make_word_list (t, result);
- }
-
- free (current_word);
-
- /* Note whether or not the separator is IFS whitespace, used later. */
- whitesep = string[sindex] && spctabnl (string[sindex]);
-
- /* Move past the current separator character. */
- if (string[sindex])
- {
- DECLARE_MBSTATE;
- ADVANCE_CHAR (string, slen, sindex);
- }
-
- /* Now skip sequences of space, tab, or newline characters if they are
- in the list of separators. */
- while (string[sindex] && spctabnl (string[sindex]) && issep (string[sindex]))
- sindex++;
-
- /* If the first separator was IFS whitespace and the current character
- is a non-whitespace IFS character, it should be part of the current
- field delimiter, not a separate delimiter that would result in an
- empty field. Look at POSIX.2, 3.6.5, (3)(b). */
- if (string[sindex] && whitesep && issep (string[sindex]) && !spctabnl (string[sindex]))
- {
- sindex++;
- /* An IFS character that is not IFS white space, along with any
- adjacent IFS white space, shall delimit a field. (SUSv3) */
- while (string[sindex] && spctabnl (string[sindex]) && isifs (string[sindex]))
- sindex++;
- }
- }
- return (REVERSE_LIST (result, WORD_LIST *));
-}
-
-/* Parse a single word from STRING, using SEPARATORS to separate fields.
- ENDPTR is set to the first character after the word. This is used by
- the `read' builtin. This is never called with SEPARATORS != $IFS;
- it should be simplified.
-
- XXX - this function is very similar to list_string; they should be
- combined - XXX */
-char *
-get_word_from_string (stringp, separators, endptr)
- char **stringp, *separators, **endptr;
-{
- register char *s;
- char *current_word;
- int sindex, sh_style_split, whitesep, xflags;
- size_t slen;
-
- if (!stringp || !*stringp || !**stringp)
- return ((char *)NULL);
-
- sh_style_split = separators && separators[0] == ' ' &&
- separators[1] == '\t' &&
- separators[2] == '\n' &&
- separators[3] == '\0';
- for (xflags = 0, s = ifs_value; s && *s; s++)
- {
- if (*s == CTLESC) xflags |= SX_NOCTLESC;
- if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL;
- }
-
- s = *stringp;
- slen = 0;
-
- /* Remove sequences of whitespace at the beginning of STRING, as
- long as those characters appear in IFS. */
- if (sh_style_split || !separators || !*separators)
- {
- for (; *s && spctabnl (*s) && isifs (*s); s++);
-
- /* If the string is nothing but whitespace, update it and return. */
- if (!*s)
- {
- *stringp = s;
- if (endptr)
- *endptr = s;
- return ((char *)NULL);
- }
- }
-
- /* OK, S points to a word that does not begin with white space.
- Now extract a word, stopping at a separator, save a pointer to
- the first character after the word, then skip sequences of spc,
- tab, or nl as long as they are separators.
-
- This obeys the field splitting rules in Posix.2. */
- sindex = 0;
- /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim
- unless multibyte chars are possible. */
- slen = (MB_CUR_MAX > 1) ? strlen (s) : 1;
- current_word = string_extract_verbatim (s, slen, &sindex, separators, xflags);
-
- /* Set ENDPTR to the first character after the end of the word. */
- if (endptr)
- *endptr = s + sindex;
-
- /* Note whether or not the separator is IFS whitespace, used later. */
- whitesep = s[sindex] && spctabnl (s[sindex]);
-
- /* Move past the current separator character. */
- if (s[sindex])
- {
- DECLARE_MBSTATE;
- ADVANCE_CHAR (s, slen, sindex);
- }
-
- /* Now skip sequences of space, tab, or newline characters if they are
- in the list of separators. */
- while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex]))
- sindex++;
-
- /* If the first separator was IFS whitespace and the current character is
- a non-whitespace IFS character, it should be part of the current field
- delimiter, not a separate delimiter that would result in an empty field.
- Look at POSIX.2, 3.6.5, (3)(b). */
- if (s[sindex] && whitesep && isifs (s[sindex]) && !spctabnl (s[sindex]))
- {
- sindex++;
- /* An IFS character that is not IFS white space, along with any adjacent
- IFS white space, shall delimit a field. */
- while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex]))
- sindex++;
- }
-
- /* Update STRING to point to the next field. */
- *stringp = s + sindex;
- return (current_word);
-}
-
-/* Remove IFS white space at the end of STRING. Start at the end
- of the string and walk backwards until the beginning of the string
- or we find a character that's not IFS white space and not CTLESC.
- Only let CTLESC escape a white space character if SAW_ESCAPE is
- non-zero. */
-char *
-strip_trailing_ifs_whitespace (string, separators, saw_escape)
- char *string, *separators;
- int saw_escape;
-{
- char *s;
-
- s = string + STRLEN (string) - 1;
- while (s > string && ((spctabnl (*s) && isifs (*s)) ||
- (saw_escape && *s == CTLESC && spctabnl (s[1]))))
- s--;
- *++s = '\0';
- return string;
-}
-
-#if 0
-/* UNUSED */
-/* Split STRING into words at whitespace. Obeys shell-style quoting with
- backslashes, single and double quotes. */
-WORD_LIST *
-list_string_with_quotes (string)
- char *string;
-{
- WORD_LIST *list;
- char *token, *s;
- size_t s_len;
- int c, i, tokstart, len;
-
- for (s = string; s && *s && spctabnl (*s); s++)
- ;
- if (s == 0 || *s == 0)
- return ((WORD_LIST *)NULL);
-
- s_len = strlen (s);
- tokstart = i = 0;
- list = (WORD_LIST *)NULL;
- while (1)
- {
- c = s[i];
- if (c == '\\')
- {
- i++;
- if (s[i])
- i++;
- }
- else if (c == '\'')
- i = skip_single_quoted (s, s_len, ++i);
- else if (c == '"')
- i = skip_double_quoted (s, s_len, ++i);
- else if (c == 0 || spctabnl (c))
- {
- /* We have found the end of a token. Make a word out of it and
- add it to the word list. */
- token = substring (s, tokstart, i);
- list = add_string_to_list (token, list);
- free (token);
- while (spctabnl (s[i]))
- i++;
- if (s[i])
- tokstart = i;
- else
- break;
- }
- else
- i++; /* normal character */
- }
- return (REVERSE_LIST (list, WORD_LIST *));
-}
-#endif
-
-/********************************************************/
-/* */
-/* Functions to perform assignment statements */
-/* */
-/********************************************************/
-
-#if defined (ARRAY_VARS)
-static SHELL_VAR *
-do_compound_assignment (name, value, flags)
- char *name, *value;
- int flags;
-{
- SHELL_VAR *v;
- int mklocal, mkassoc;
- WORD_LIST *list;
-
- mklocal = flags & ASS_MKLOCAL;
- mkassoc = flags & ASS_MKASSOC;
-
- if (mklocal && variable_context)
- {
- v = find_variable (name);
- list = expand_compound_array_assignment (v, value, flags);
- if (mkassoc)
- v = make_local_assoc_variable (name);
- else if (v == 0 || (array_p (v) == 0 && assoc_p (v) == 0) || v->context != variable_context)
- v = make_local_array_variable (name);
- assign_compound_array_list (v, list, flags);
- }
- else
- v = assign_array_from_string (name, value, flags);
-
- return (v);
-}
-#endif
-
-/* Given STRING, an assignment string, get the value of the right side
- of the `=', and bind it to the left side. If EXPAND is true, then
- perform parameter expansion, command substitution, and arithmetic
- expansion on the right-hand side. Perform tilde expansion in any
- case. Do not perform word splitting on the result of expansion. */
-static int
-do_assignment_internal (word, expand)
- const WORD_DESC *word;
- int expand;
-{
- int offset, appendop, assign_list, aflags, retval;
- char *name, *value, *temp;
- SHELL_VAR *entry;
-#if defined (ARRAY_VARS)
- char *t;
- int ni;
-#endif
- const char *string;
-
- if (word == 0 || word->word == 0)
- return 0;
-
- appendop = assign_list = aflags = 0;
- string = word->word;
- offset = assignment (string, 0);
- name = savestring (string);
- value = (char *)NULL;
-
- if (name[offset] == '=')
- {
- if (name[offset - 1] == '+')
- {
- appendop = 1;
- name[offset - 1] = '\0';
- }
-
- name[offset] = 0; /* might need this set later */
- temp = name + offset + 1;
-
-#if defined (ARRAY_VARS)
- if (expand && (word->flags & W_COMPASSIGN))
- {
- assign_list = ni = 1;
- value = extract_array_assignment_list (temp, &ni);
- }
- else
-#endif
- if (expand && temp[0])
- value = expand_string_if_necessary (temp, 0, expand_string_assignment);
- else
- value = savestring (temp);
- }
-
- if (value == 0)
- {
- value = (char *)xmalloc (1);
- value[0] = '\0';
- }
-
- if (echo_command_at_execute)
- {
- if (appendop)
- name[offset - 1] = '+';
- xtrace_print_assignment (name, value, assign_list, 1);
- if (appendop)
- name[offset - 1] = '\0';
- }
-
-#define ASSIGN_RETURN(r) do { FREE (value); free (name); return (r); } while (0)
-
- if (appendop)
- aflags |= ASS_APPEND;
-
-#if defined (ARRAY_VARS)
- if (t = mbschr (name, '[')) /*]*/
- {
- if (assign_list)
- {
- report_error (_("%s: cannot assign list to array member"), name);
- ASSIGN_RETURN (0);
- }
- entry = assign_array_element (name, value, aflags);
- if (entry == 0)
- ASSIGN_RETURN (0);
- }
- else if (assign_list)
- {
- if (word->flags & W_ASSIGNARG)
- aflags |= ASS_MKLOCAL;
- if (word->flags & W_ASSIGNASSOC)
- aflags |= ASS_MKASSOC;
- entry = do_compound_assignment (name, value, aflags);
- }
- else
-#endif /* ARRAY_VARS */
- entry = bind_variable (name, value, aflags);
-
- stupidly_hack_special_variables (name);
-
-#if 1
- /* Return 1 if the assignment seems to have been performed correctly. */
- if (entry == 0 || readonly_p (entry))
- retval = 0; /* assignment failure */
- else if (noassign_p (entry))
- {
- last_command_exit_value = EXECUTION_FAILURE;
- retval = 1; /* error status, but not assignment failure */
- }
- else
- retval = 1;
-
- if (entry && retval != 0 && noassign_p (entry) == 0)
- VUNSETATTR (entry, att_invisible);
-
- ASSIGN_RETURN (retval);
-#else
- if (entry)
- VUNSETATTR (entry, att_invisible);
-
- ASSIGN_RETURN (entry ? ((readonly_p (entry) == 0) && noassign_p (entry) == 0) : 0);
-#endif
-}
-
-/* Perform the assignment statement in STRING, and expand the
- right side by doing tilde, command and parameter expansion. */
-int
-do_assignment (string)
- char *string;
-{
- WORD_DESC td;
-
- td.flags = W_ASSIGNMENT;
- td.word = string;
-
- return do_assignment_internal (&td, 1);
-}
-
-int
-do_word_assignment (word, flags)
- WORD_DESC *word;
- int flags;
-{
- return do_assignment_internal (word, 1);
-}
-
-/* Given STRING, an assignment string, get the value of the right side
- of the `=', and bind it to the left side. Do not perform any word
- expansions on the right hand side. */
-int
-do_assignment_no_expand (string)
- char *string;
-{
- WORD_DESC td;
-
- td.flags = W_ASSIGNMENT;
- td.word = string;
-
- return (do_assignment_internal (&td, 0));
-}
-
-/***************************************************
- * *
- * Functions to manage the positional parameters *
- * *
- ***************************************************/
-
-/* Return the word list that corresponds to `$*'. */
-WORD_LIST *
-list_rest_of_args ()
-{
- register WORD_LIST *list, *args;
- int i;
-
- /* Break out of the loop as soon as one of the dollar variables is null. */
- for (i = 1, list = (WORD_LIST *)NULL; i < 10 && dollar_vars[i]; i++)
- list = make_word_list (make_bare_word (dollar_vars[i]), list);
-
- for (args = rest_of_args; args; args = args->next)
- list = make_word_list (make_bare_word (args->word->word), list);
-
- return (REVERSE_LIST (list, WORD_LIST *));
-}
-
-int
-number_of_args ()
-{
- register WORD_LIST *list;
- int n;
-
- for (n = 0; n < 9 && dollar_vars[n+1]; n++)
- ;
- for (list = rest_of_args; list; list = list->next)
- n++;
- return n;
-}
-
-/* Return the value of a positional parameter. This handles values > 10. */
-char *
-get_dollar_var_value (ind)
- intmax_t ind;
-{
- char *temp;
- WORD_LIST *p;
-
- if (ind < 10)
- temp = dollar_vars[ind] ? savestring (dollar_vars[ind]) : (char *)NULL;
- else /* We want something like ${11} */
- {
- ind -= 10;
- for (p = rest_of_args; p && ind--; p = p->next)
- ;
- temp = p ? savestring (p->word->word) : (char *)NULL;
- }
- return (temp);
-}
-
-/* Make a single large string out of the dollar digit variables,
- and the rest_of_args. If DOLLAR_STAR is 1, then obey the special
- case of "$*" with respect to IFS. */
-char *
-string_rest_of_args (dollar_star)
- int dollar_star;
-{
- register WORD_LIST *list;
- char *string;
-
- list = list_rest_of_args ();
- string = dollar_star ? string_list_dollar_star (list) : string_list (list);
- dispose_words (list);
- return (string);
-}
-
-/* Return a string containing the positional parameters from START to
- END, inclusive. If STRING[0] == '*', we obey the rules for $*,
- which only makes a difference if QUOTED is non-zero. If QUOTED includes
- Q_HERE_DOCUMENT or Q_DOUBLE_QUOTES, this returns a quoted list, otherwise
- no quoting chars are added. */
-static char *
-pos_params (string, start, end, quoted)
- char *string;
- int start, end, quoted;
-{
- WORD_LIST *save, *params, *h, *t;
- char *ret;
- int i;
-
- /* see if we can short-circuit. if start == end, we want 0 parameters. */
- if (start == end)
- return ((char *)NULL);
-
- save = params = list_rest_of_args ();
- if (save == 0)
- return ((char *)NULL);
-
- if (start == 0) /* handle ${@:0[:x]} specially */
- {
- t = make_word_list (make_word (dollar_vars[0]), params);
- save = params = t;
- }
-
- for (i = start ? 1 : 0; params && i < start; i++)
- params = params->next;
- if (params == 0)
- return ((char *)NULL);
- for (h = t = params; params && i < end; i++)
- {
- t = params;
- params = params->next;
- }
-
- t->next = (WORD_LIST *)NULL;
-
- ret = string_list_pos_params (string[0], h, quoted);
-
- if (t != params)
- t->next = params;
-
- dispose_words (save);
- return (ret);
-}
-
-/******************************************************************/
-/* */
-/* Functions to expand strings to strings or WORD_LISTs */
-/* */
-/******************************************************************/
-
-#if defined (PROCESS_SUBSTITUTION)
-#define EXP_CHAR(s) (s == '$' || s == '`' || s == '<' || s == '>' || s == CTLESC || s == '~')
-#else
-#define EXP_CHAR(s) (s == '$' || s == '`' || s == CTLESC || s == '~')
-#endif
-
-/* If there are any characters in STRING that require full expansion,
- then call FUNC to expand STRING; otherwise just perform quote
- removal if necessary. This returns a new string. */
-static char *
-expand_string_if_necessary (string, quoted, func)
- char *string;
- int quoted;
- EXPFUNC *func;
-{
- WORD_LIST *list;
- size_t slen;
- int i, saw_quote;
- char *ret;
- DECLARE_MBSTATE;
-
- /* Don't need string length for ADVANCE_CHAR unless multibyte chars possible. */
- slen = (MB_CUR_MAX > 1) ? strlen (string) : 0;
- i = saw_quote = 0;
- while (string[i])
- {
- if (EXP_CHAR (string[i]))
- break;
- else if (string[i] == '\'' || string[i] == '\\' || string[i] == '"')
- saw_quote = 1;
- ADVANCE_CHAR (string, slen, i);
- }
-
- if (string[i])
- {
- list = (*func) (string, quoted);
- if (list)
- {
- ret = string_list (list);
- dispose_words (list);
- }
- else
- ret = (char *)NULL;
- }
- else if (saw_quote && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0))
- ret = string_quote_removal (string, quoted);
- else
- ret = savestring (string);
-
- return ret;
-}
-
-static inline char *
-expand_string_to_string_internal (string, quoted, func)
- char *string;
- int quoted;
- EXPFUNC *func;
-{
- WORD_LIST *list;
- char *ret;
-
- if (string == 0 || *string == '\0')
- return ((char *)NULL);
-
- list = (*func) (string, quoted);
- if (list)
- {
- ret = string_list (list);
- dispose_words (list);
- }
- else
- ret = (char *)NULL;
-
- return (ret);
-}
-
-char *
-expand_string_to_string (string, quoted)
- char *string;
- int quoted;
-{
- return (expand_string_to_string_internal (string, quoted, expand_string));
-}
-
-char *
-expand_string_unsplit_to_string (string, quoted)
- char *string;
- int quoted;
-{
- return (expand_string_to_string_internal (string, quoted, expand_string_unsplit));
-}
-
-char *
-expand_assignment_string_to_string (string, quoted)
- char *string;
- int quoted;
-{
- return (expand_string_to_string_internal (string, quoted, expand_string_assignment));
-}
-
-char *
-expand_arith_string (string, quoted)
- char *string;
- int quoted;
-{
- return (expand_string_if_necessary (string, quoted, expand_string));
-}
-
-#if defined (COND_COMMAND)
-/* Just remove backslashes in STRING. Returns a new string. */
-char *
-remove_backslashes (string)
- char *string;
-{
- char *r, *ret, *s;
-
- r = ret = (char *)xmalloc (strlen (string) + 1);
- for (s = string; s && *s; )
- {
- if (*s == '\\')
- s++;
- if (*s == 0)
- break;
- *r++ = *s++;
- }
- *r = '\0';
- return ret;
-}
-
-/* This needs better error handling. */
-/* Expand W for use as an argument to a unary or binary operator in a
- [[...]] expression. If SPECIAL is 1, this is the rhs argument
- to the != or == operator, and should be treated as a pattern. In
- this case, we quote the string specially for the globbing code. If
- SPECIAL is 2, this is an rhs argument for the =~ operator, and should
- be quoted appropriately for regcomp/regexec. The caller is responsible
- for removing the backslashes if the unquoted word is needed later. */
-char *
-cond_expand_word (w, special)
- WORD_DESC *w;
- int special;
-{
- char *r, *p;
- WORD_LIST *l;
- int qflags;
-
- if (w->word == 0 || w->word[0] == '\0')
- return ((char *)NULL);
-
- w->flags |= W_NOSPLIT2;
- l = call_expand_word_internal (w, 0, 0, (int *)0, (int *)0);
- if (l)
- {
- if (special == 0)
- {
- dequote_list (l);
- r = string_list (l);
- }
- else
- {
- qflags = QGLOB_CVTNULL;
- if (special == 2)
- qflags |= QGLOB_REGEXP;
- p = string_list (l);
- r = quote_string_for_globbing (p, qflags);
- free (p);
- }
- dispose_words (l);
- }
- else
- r = (char *)NULL;
-
- return r;
-}
-#endif
-
-/* Call expand_word_internal to expand W and handle error returns.
- A convenience function for functions that don't want to handle
- any errors or free any memory before aborting. */
-static WORD_LIST *
-call_expand_word_internal (w, q, i, c, e)
- WORD_DESC *w;
- int q, i, *c, *e;
-{
- WORD_LIST *result;
-
- result = expand_word_internal (w, q, i, c, e);
- if (result == &expand_word_error || result == &expand_word_fatal)
- {
- /* By convention, each time this error is returned, w->word has
- already been freed (it sometimes may not be in the fatal case,
- but that doesn't result in a memory leak because we're going
- to exit in most cases). */
- w->word = (char *)NULL;
- last_command_exit_value = EXECUTION_FAILURE;
- exp_jump_to_top_level ((result == &expand_word_error) ? DISCARD : FORCE_EOF);
- /* NOTREACHED */
- }
- else
- return (result);
-}
-
-/* Perform parameter expansion, command substitution, and arithmetic
- expansion on STRING, as if it were a word. Leave the result quoted.
- Since this does not perform word splitting, it leaves quoted nulls
- in the result. */
-static WORD_LIST *
-expand_string_internal (string, quoted)
- char *string;
- int quoted;
-{
- WORD_DESC td;
- WORD_LIST *tresult;
-
- if (string == 0 || *string == 0)
- return ((WORD_LIST *)NULL);
-
- td.flags = 0;
- td.word = savestring (string);
-
- tresult = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL);
-
- FREE (td.word);
- return (tresult);
-}
-
-/* Expand STRING by performing parameter expansion, command substitution,
- and arithmetic expansion. Dequote the resulting WORD_LIST before
- returning it, but do not perform word splitting. The call to
- remove_quoted_nulls () is in here because word splitting normally
- takes care of quote removal. */
-WORD_LIST *
-expand_string_unsplit (string, quoted)
- char *string;
- int quoted;
-{
- WORD_LIST *value;
-
- if (string == 0 || *string == '\0')
- return ((WORD_LIST *)NULL);
-
- expand_no_split_dollar_star = 1;
- value = expand_string_internal (string, quoted);
- expand_no_split_dollar_star = 0;
-
- if (value)
- {
- if (value->word)
- {
- remove_quoted_nulls (value->word->word);
- value->word->flags &= ~W_HASQUOTEDNULL;
- }
- dequote_list (value);
- }
- return (value);
-}
-
-/* Expand the rhs of an assignment statement */
-WORD_LIST *
-expand_string_assignment (string, quoted)
- char *string;
- int quoted;
-{
- WORD_DESC td;
- WORD_LIST *value;
-
- if (string == 0 || *string == '\0')
- return ((WORD_LIST *)NULL);
-
- expand_no_split_dollar_star = 1;
-
- td.flags = W_ASSIGNRHS;
- td.word = savestring (string);
- value = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL);
- FREE (td.word);
-
- expand_no_split_dollar_star = 0;
-
- if (value)
- {
- if (value->word)
- {
- remove_quoted_nulls (value->word->word);
- value->word->flags &= ~W_HASQUOTEDNULL;
- }
- dequote_list (value);
- }
- return (value);
-}
-
-
-/* Expand one of the PS? prompt strings. This is a sort of combination of
- expand_string_unsplit and expand_string_internal, but returns the
- passed string when an error occurs. Might want to trap other calls
- to jump_to_top_level here so we don't endlessly loop. */
-WORD_LIST *
-expand_prompt_string (string, quoted, wflags)
- char *string;
- int quoted;
- int wflags;
-{
- WORD_LIST *value;
- WORD_DESC td;
-
- if (string == 0 || *string == 0)
- return ((WORD_LIST *)NULL);
-
- td.flags = wflags;
- td.word = savestring (string);
-
- no_longjmp_on_fatal_error = 1;
- value = expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL);
- no_longjmp_on_fatal_error = 0;
-
- if (value == &expand_word_error || value == &expand_word_fatal)
- {
- value = make_word_list (make_bare_word (string), (WORD_LIST *)NULL);
- return value;
- }
- FREE (td.word);
- if (value)
- {
- if (value->word)
- {
- remove_quoted_nulls (value->word->word);
- value->word->flags &= ~W_HASQUOTEDNULL;
- }
- dequote_list (value);
- }
- return (value);
-}
-
-/* Expand STRING just as if you were expanding a word, but do not dequote
- the resultant WORD_LIST. This is called only from within this file,
- and is used to correctly preserve quoted characters when expanding
- things like ${1+"$@"}. This does parameter expansion, command
- substitution, arithmetic expansion, and word splitting. */
-static WORD_LIST *
-expand_string_leave_quoted (string, quoted)
- char *string;
- int quoted;
-{
- WORD_LIST *tlist;
- WORD_LIST *tresult;
-
- if (string == 0 || *string == '\0')
- return ((WORD_LIST *)NULL);
-
- tlist = expand_string_internal (string, quoted);
-
- if (tlist)
- {
- tresult = word_list_split (tlist);
- dispose_words (tlist);
- return (tresult);
- }
- return ((WORD_LIST *)NULL);
-}
-
-/* This does not perform word splitting or dequote the WORD_LIST
- it returns. */
-static WORD_LIST *
-expand_string_for_rhs (string, quoted, dollar_at_p, has_dollar_at)
- char *string;
- int quoted, *dollar_at_p, *has_dollar_at;
-{
- WORD_DESC td;
- WORD_LIST *tresult;
-
- if (string == 0 || *string == '\0')
- return (WORD_LIST *)NULL;
-
- td.flags = W_NOSPLIT2; /* no splitting, remove "" and '' */
- td.word = string;
- tresult = call_expand_word_internal (&td, quoted, 1, dollar_at_p, has_dollar_at);
- return (tresult);
-}
-
-/* Expand STRING just as if you were expanding a word. This also returns
- a list of words. Note that filename globbing is *NOT* done for word
- or string expansion, just when the shell is expanding a command. This
- does parameter expansion, command substitution, arithmetic expansion,
- and word splitting. Dequote the resultant WORD_LIST before returning. */
-WORD_LIST *
-expand_string (string, quoted)
- char *string;
- int quoted;
-{
- WORD_LIST *result;
-
- if (string == 0 || *string == '\0')
- return ((WORD_LIST *)NULL);
-
- result = expand_string_leave_quoted (string, quoted);
- return (result ? dequote_list (result) : result);
-}
-
-/***************************************************
- * *
- * Functions to handle quoting chars *
- * *
- ***************************************************/
-
-/* Conventions:
-
- A string with s[0] == CTLNUL && s[1] == 0 is a quoted null string.
- The parser passes CTLNUL as CTLESC CTLNUL. */
-
-/* Quote escape characters in string s, but no other characters. This is
- used to protect CTLESC and CTLNUL in variable values from the rest of
- the word expansion process after the variable is expanded (word splitting
- and filename generation). If IFS is null, we quote spaces as well, just
- in case we split on spaces later (in the case of unquoted $@, we will
- eventually attempt to split the entire word on spaces). Corresponding
- code exists in dequote_escapes. Even if we don't end up splitting on
- spaces, quoting spaces is not a problem. This should never be called on
- a string that is quoted with single or double quotes or part of a here
- document (effectively double-quoted). */
-char *
-quote_escapes (string)
- char *string;
-{
- register char *s, *t;
- size_t slen;
- char *result, *send;
- int quote_spaces, skip_ctlesc, skip_ctlnul;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- send = string + slen;
-
- quote_spaces = (ifs_value && *ifs_value == 0);
-
- for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++)
- skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL;
-
- t = result = (char *)xmalloc ((slen * 2) + 1);
- s = string;
-
- while (*s)
- {
- if ((skip_ctlesc == 0 && *s == CTLESC) || (skip_ctlnul == 0 && *s == CTLNUL) || (quote_spaces && *s == ' '))
- *t++ = CTLESC;
- COPY_CHAR_P (t, s, send);
- }
- *t = '\0';
- return (result);
-}
-
-static WORD_LIST *
-list_quote_escapes (list)
- WORD_LIST *list;
-{
- register WORD_LIST *w;
- char *t;
-
- for (w = list; w; w = w->next)
- {
- t = w->word->word;
- w->word->word = quote_escapes (t);
- free (t);
- }
- return list;
-}
-
-/* Inverse of quote_escapes; remove CTLESC protecting CTLESC or CTLNUL.
-
- The parser passes us CTLESC as CTLESC CTLESC and CTLNUL as CTLESC CTLNUL.
- This is necessary to make unquoted CTLESC and CTLNUL characters in the
- data stream pass through properly.
-
- We need to remove doubled CTLESC characters inside quoted strings before
- quoting the entire string, so we do not double the number of CTLESC
- characters.
-
- Also used by parts of the pattern substitution code. */
-char *
-dequote_escapes (string)
- char *string;
-{
- register char *s, *t, *s1;
- size_t slen;
- char *result, *send;
- int quote_spaces;
- DECLARE_MBSTATE;
-
- if (string == 0)
- return string;
-
- slen = strlen (string);
- send = string + slen;
-
- t = result = (char *)xmalloc (slen + 1);
-
- if (strchr (string, CTLESC) == 0)
- return (strcpy (result, string));
-
- quote_spaces = (ifs_value && *ifs_value == 0);
-
- s = string;
- while (*s)
- {
- if (*s == CTLESC && (s[1] == CTLESC || s[1] == CTLNUL || (quote_spaces && s[1] == ' ')))
- {
- s++;
- if (*s == '\0')
- break;
- }
- COPY_CHAR_P (t, s, send);
- }
- *t = '\0';
- return result;
-}
-
-/* Return a new string with the quoted representation of character C.
- This turns "" into QUOTED_NULL, so the W_HASQUOTEDNULL flag needs to be
- set in any resultant WORD_DESC where this value is the word. */
-static char *
-make_quoted_char (c)
- int c;
-{
- char *temp;
-
- temp = (char *)xmalloc (3);
- if (c == 0)
- {
- temp[0] = CTLNUL;
- temp[1] = '\0';
- }
- else
- {
- temp[0] = CTLESC;
- temp[1] = c;
- temp[2] = '\0';
- }
- return (temp);
-}
-
-/* Quote STRING, returning a new string. This turns "" into QUOTED_NULL, so
- the W_HASQUOTEDNULL flag needs to be set in any resultant WORD_DESC where
- this value is the word. */
-char *
-quote_string (string)
- char *string;
-{
- register char *t;
- size_t slen;
- char *result, *send;
-
- if (*string == 0)
- {
- result = (char *)xmalloc (2);
- result[0] = CTLNUL;
- result[1] = '\0';
- }
- else
- {
- DECLARE_MBSTATE;
-
- slen = strlen (string);
- send = string + slen;
-
- result = (char *)xmalloc ((slen * 2) + 1);
-
- for (t = result; string < send; )
- {
- *t++ = CTLESC;
- COPY_CHAR_P (t, string, send);
- }
- *t = '\0';
- }
- return (result);
-}
-
-/* De-quote quoted characters in STRING. */
-char *
-dequote_string (string)
- char *string;
-{
- register char *s, *t;
- size_t slen;
- char *result, *send;
- DECLARE_MBSTATE;
-
- slen = strlen (string);
-
- t = result = (char *)xmalloc (slen + 1);
-
- if (QUOTED_NULL (string))
- {
- result[0] = '\0';
- return (result);
- }
-
- /* If no character in the string can be quoted, don't bother examining
- each character. Just return a copy of the string passed to us. */
- if (strchr (string, CTLESC) == NULL)
- return (strcpy (result, string));
-
- send = string + slen;
- s = string;
- while (*s)
- {
- if (*s == CTLESC)
- {
- s++;
- if (*s == '\0')
- break;
- }
- COPY_CHAR_P (t, s, send);
- }
-
- *t = '\0';
- return (result);
-}
-
-/* Quote the entire WORD_LIST list. */
-static WORD_LIST *
-quote_list (list)
- WORD_LIST *list;
-{
- register WORD_LIST *w;
- char *t;
-
- for (w = list; w; w = w->next)
- {
- t = w->word->word;
- w->word->word = quote_string (t);
- if (*t == 0)
- w->word->flags |= W_HASQUOTEDNULL; /* XXX - turn on W_HASQUOTEDNULL here? */
- w->word->flags |= W_QUOTED;
- free (t);
- }
- return list;
-}
-
-/* De-quote quoted characters in each word in LIST. */
-WORD_LIST *
-dequote_list (list)
- WORD_LIST *list;
-{
- register char *s;
- register WORD_LIST *tlist;
-
- for (tlist = list; tlist; tlist = tlist->next)
- {
- s = dequote_string (tlist->word->word);
- if (QUOTED_NULL (tlist->word->word))
- tlist->word->flags &= ~W_HASQUOTEDNULL;
- free (tlist->word->word);
- tlist->word->word = s;
- }
- return list;
-}
-
-/* Remove CTLESC protecting a CTLESC or CTLNUL in place. Return the passed
- string. */
-char *
-remove_quoted_escapes (string)
- char *string;
-{
- char *t;
-
- if (string)
- {
- t = dequote_escapes (string);
- strcpy (string, t);
- free (t);
- }
-
- return (string);
-}
-
-/* Perform quoted null character removal on STRING. We don't allow any
- quoted null characters in the middle or at the ends of strings because
- of how expand_word_internal works. remove_quoted_nulls () turns
- STRING into an empty string iff it only consists of a quoted null,
- and removes all unquoted CTLNUL characters. */
-char *
-remove_quoted_nulls (string)
- char *string;
-{
- register size_t slen;
- register int i, j, prev_i;
- DECLARE_MBSTATE;
-
- if (strchr (string, CTLNUL) == 0) /* XXX */
- return string; /* XXX */
-
- slen = strlen (string);
- i = j = 0;
-
- while (i < slen)
- {
- if (string[i] == CTLESC)
- {
- /* Old code had j++, but we cannot assume that i == j at this
- point -- what if a CTLNUL has already been removed from the
- string? We don't want to drop the CTLESC or recopy characters
- that we've already copied down. */
- i++; string[j++] = CTLESC;
- if (i == slen)
- break;
- }
- else if (string[i] == CTLNUL)
- {
- i++;
- continue;
- }
-
- prev_i = i;
- ADVANCE_CHAR (string, slen, i);
- if (j < prev_i)
- {
- do string[j++] = string[prev_i++]; while (prev_i < i);
- }
- else
- j = i;
- }
- string[j] = '\0';
-
- return (string);
-}
-
-/* Perform quoted null character removal on each element of LIST.
- This modifies LIST. */
-void
-word_list_remove_quoted_nulls (list)
- WORD_LIST *list;
-{
- register WORD_LIST *t;
-
- for (t = list; t; t = t->next)
- {
- remove_quoted_nulls (t->word->word);
- t->word->flags &= ~W_HASQUOTEDNULL;
- }
-}
-
-/* **************************************************************** */
-/* */
-/* Functions for Matching and Removing Patterns */
-/* */
-/* **************************************************************** */
-
-#if defined (HANDLE_MULTIBYTE)
-#if 0 /* Currently unused */
-static unsigned char *
-mb_getcharlens (string, len)
- char *string;
- int len;
-{
- int i, offset, last;
- unsigned char *ret;
- char *p;
- DECLARE_MBSTATE;
-
- i = offset = 0;
- last = 0;
- ret = (unsigned char *)xmalloc (len);
- memset (ret, 0, len);
- while (string[last])
- {
- ADVANCE_CHAR (string, len, offset);
- ret[last] = offset - last;
- last = offset;
- }
- return ret;
-}
-#endif
-#endif
-
-/* Remove the portion of PARAM matched by PATTERN according to OP, where OP
- can have one of 4 values:
- RP_LONG_LEFT remove longest matching portion at start of PARAM
- RP_SHORT_LEFT remove shortest matching portion at start of PARAM
- RP_LONG_RIGHT remove longest matching portion at end of PARAM
- RP_SHORT_RIGHT remove shortest matching portion at end of PARAM
-*/
-
-#define RP_LONG_LEFT 1
-#define RP_SHORT_LEFT 2
-#define RP_LONG_RIGHT 3
-#define RP_SHORT_RIGHT 4
-
-/* Returns its first argument if nothing matched; new memory otherwise */
-static char *
-remove_upattern (param, pattern, op)
- char *param, *pattern;
- int op;
-{
- register int len;
- register char *end;
- register char *p, *ret, c;
-
- len = STRLEN (param);
- end = param + len;
-
- switch (op)
- {
- case RP_LONG_LEFT: /* remove longest match at start */
- for (p = end; p >= param; p--)
- {
- c = *p; *p = '\0';
- if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- *p = c;
- return (savestring (p));
- }
- *p = c;
-
- }
- break;
-
- case RP_SHORT_LEFT: /* remove shortest match at start */
- for (p = param; p <= end; p++)
- {
- c = *p; *p = '\0';
- if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- *p = c;
- return (savestring (p));
- }
- *p = c;
- }
- break;
-
- case RP_LONG_RIGHT: /* remove longest match at end */
- for (p = param; p <= end; p++)
- {
- if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- c = *p; *p = '\0';
- ret = savestring (param);
- *p = c;
- return (ret);
- }
- }
- break;
-
- case RP_SHORT_RIGHT: /* remove shortest match at end */
- for (p = end; p >= param; p--)
- {
- if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- c = *p; *p = '\0';
- ret = savestring (param);
- *p = c;
- return (ret);
- }
- }
- break;
- }
-
- return (param); /* no match, return original string */
-}
-
-#if defined (HANDLE_MULTIBYTE)
-/* Returns its first argument if nothing matched; new memory otherwise */
-static wchar_t *
-remove_wpattern (wparam, wstrlen, wpattern, op)
- wchar_t *wparam;
- size_t wstrlen;
- wchar_t *wpattern;
- int op;
-{
- wchar_t wc, *ret;
- int n;
-
- switch (op)
- {
- case RP_LONG_LEFT: /* remove longest match at start */
- for (n = wstrlen; n >= 0; n--)
- {
- wc = wparam[n]; wparam[n] = L'\0';
- if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- wparam[n] = wc;
- return (wcsdup (wparam + n));
- }
- wparam[n] = wc;
- }
- break;
-
- case RP_SHORT_LEFT: /* remove shortest match at start */
- for (n = 0; n <= wstrlen; n++)
- {
- wc = wparam[n]; wparam[n] = L'\0';
- if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- wparam[n] = wc;
- return (wcsdup (wparam + n));
- }
- wparam[n] = wc;
- }
- break;
-
- case RP_LONG_RIGHT: /* remove longest match at end */
- for (n = 0; n <= wstrlen; n++)
- {
- if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- wc = wparam[n]; wparam[n] = L'\0';
- ret = wcsdup (wparam);
- wparam[n] = wc;
- return (ret);
- }
- }
- break;
-
- case RP_SHORT_RIGHT: /* remove shortest match at end */
- for (n = wstrlen; n >= 0; n--)
- {
- if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH)
- {
- wc = wparam[n]; wparam[n] = L'\0';
- ret = wcsdup (wparam);
- wparam[n] = wc;
- return (ret);
- }
- }
- break;
- }
-
- return (wparam); /* no match, return original string */
-}
-#endif /* HANDLE_MULTIBYTE */
-
-static char *
-remove_pattern (param, pattern, op)
- char *param, *pattern;
- int op;
-{
- char *xret;
-
- if (param == NULL)
- return (param);
- if (*param == '\0' || pattern == NULL || *pattern == '\0') /* minor optimization */
- return (savestring (param));
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1)
- {
- wchar_t *ret, *oret;
- size_t n;
- wchar_t *wparam, *wpattern;
- mbstate_t ps;
-
- n = xdupmbstowcs (&wpattern, NULL, pattern);
- if (n == (size_t)-1)
- {
- xret = remove_upattern (param, pattern, op);
- return ((xret == param) ? savestring (param) : xret);
- }
- n = xdupmbstowcs (&wparam, NULL, param);
- if (n == (size_t)-1)
- {
- free (wpattern);
- xret = remove_upattern (param, pattern, op);
- return ((xret == param) ? savestring (param) : xret);
- }
- oret = ret = remove_wpattern (wparam, n, wpattern, op);
- /* Don't bother to convert wparam back to multibyte string if nothing
- matched; just return copy of original string */
- if (ret == wparam)
- {
- free (wparam);
- free (wpattern);
- return (savestring (param));
- }
-
- free (wparam);
- free (wpattern);
-
- n = strlen (param);
- xret = (char *)xmalloc (n + 1);
- memset (&ps, '\0', sizeof (mbstate_t));
- n = wcsrtombs (xret, (const wchar_t **)&ret, n, &ps);
- xret[n] = '\0'; /* just to make sure */
- free (oret);
- return xret;
- }
- else
-#endif
- {
- xret = remove_upattern (param, pattern, op);
- return ((xret == param) ? savestring (param) : xret);
- }
-}
-
-/* Match PAT anywhere in STRING and return the match boundaries.
- This returns 1 in case of a successful match, 0 otherwise. SP
- and EP are pointers into the string where the match begins and
- ends, respectively. MTYPE controls what kind of match is attempted.
- MATCH_BEG and MATCH_END anchor the match at the beginning and end
- of the string, respectively. The longest match is returned. */
-static int
-match_upattern (string, pat, mtype, sp, ep)
- char *string, *pat;
- int mtype;
- char **sp, **ep;
-{
- int c, len, mlen;
- register char *p, *p1, *npat;
- char *end;
- int n1;
-
- /* If the pattern doesn't match anywhere in the string, go ahead and
- short-circuit right away. A minor optimization, saves a bunch of
- unnecessary calls to strmatch (up to N calls for a string of N
- characters) if the match is unsuccessful. To preserve the semantics
- of the substring matches below, we make sure that the pattern has
- `*' as first and last character, making a new pattern if necessary. */
- /* XXX - check this later if I ever implement `**' with special meaning,
- since this will potentially result in `**' at the beginning or end */
- len = STRLEN (pat);
- if (pat[0] != '*' || (pat[0] == '*' && pat[1] == LPAREN && extended_glob) || pat[len - 1] != '*')
- {
- p = npat = (char *)xmalloc (len + 3);
- p1 = pat;
- if (*p1 != '*' || (*p1 == '*' && p1[1] == LPAREN && extended_glob))
- *p++ = '*';
- while (*p1)
- *p++ = *p1++;
- if (p1[-1] != '*' || p[-2] == '\\')
- *p++ = '*';
- *p = '\0';
- }
- else
- npat = pat;
- c = strmatch (npat, string, FNMATCH_EXTFLAG);
- if (npat != pat)
- free (npat);
- if (c == FNM_NOMATCH)
- return (0);
-
- len = STRLEN (string);
- end = string + len;
-
- mlen = umatchlen (pat, len);
-
- switch (mtype)
- {
- case MATCH_ANY:
- for (p = string; p <= end; p++)
- {
- if (match_pattern_char (pat, p))
- {
-#if 0
- for (p1 = end; p1 >= p; p1--)
-#else
- p1 = (mlen == -1) ? end : p + mlen;
- /* p1 - p = length of portion of string to be considered
- p = current position in string
- mlen = number of characters consumed by match (-1 for entire string)
- end = end of string
- we want to break immediately if the potential match len
- is greater than the number of characters remaining in the
- string
- */
- if (p1 > end)
- break;
- for ( ; p1 >= p; p1--)
-#endif
- {
- c = *p1; *p1 = '\0';
- if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0)
- {
- *p1 = c;
- *sp = p;
- *ep = p1;
- return 1;
- }
- *p1 = c;
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
- }
- }
-
- return (0);
-
- case MATCH_BEG:
- if (match_pattern_char (pat, string) == 0)
- return (0);
-
-#if 0
- for (p = end; p >= string; p--)
-#else
- for (p = (mlen == -1) ? end : string + mlen; p >= string; p--)
-#endif
- {
- c = *p; *p = '\0';
- if (strmatch (pat, string, FNMATCH_EXTFLAG) == 0)
- {
- *p = c;
- *sp = string;
- *ep = p;
- return 1;
- }
- *p = c;
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
-
- return (0);
-
- case MATCH_END:
-#if 0
- for (p = string; p <= end; p++)
-#else
- for (p = end - ((mlen == -1) ? len : mlen); p <= end; p++)
-#endif
- {
- if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0)
- {
- *sp = p;
- *ep = end;
- return 1;
- }
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
-
- return (0);
- }
-
- return (0);
-}
-
-#if defined (HANDLE_MULTIBYTE)
-/* Match WPAT anywhere in WSTRING and return the match boundaries.
- This returns 1 in case of a successful match, 0 otherwise. Wide
- character version. */
-static int
-match_wpattern (wstring, indices, wstrlen, wpat, mtype, sp, ep)
- wchar_t *wstring;
- char **indices;
- size_t wstrlen;
- wchar_t *wpat;
- int mtype;
- char **sp, **ep;
-{
- wchar_t wc, *wp, *nwpat, *wp1;
- size_t len;
- int mlen;
- int n, n1, n2, simple;
-
- simple = (wpat[0] != L'\\' && wpat[0] != L'*' && wpat[0] != L'?' && wpat[0] != L'[');
-#if defined (EXTENDED_GLOB)
- if (extended_glob)
- simple |= (wpat[1] != L'(' || (wpat[0] != L'*' && wpat[0] != L'?' && wpat[0] != L'+' && wpat[0] != L'!' && wpat[0] != L'@')); /*)*/
-#endif
-
- /* If the pattern doesn't match anywhere in the string, go ahead and
- short-circuit right away. A minor optimization, saves a bunch of
- unnecessary calls to strmatch (up to N calls for a string of N
- characters) if the match is unsuccessful. To preserve the semantics
- of the substring matches below, we make sure that the pattern has
- `*' as first and last character, making a new pattern if necessary. */
- len = wcslen (wpat);
- if (wpat[0] != L'*' || (wpat[0] == L'*' && wpat[1] == WLPAREN && extended_glob) || wpat[len - 1] != L'*')
- {
- wp = nwpat = (wchar_t *)xmalloc ((len + 3) * sizeof (wchar_t));
- wp1 = wpat;
- if (*wp1 != L'*' || (*wp1 == '*' && wp1[1] == WLPAREN && extended_glob))
- *wp++ = L'*';
- while (*wp1 != L'\0')
- *wp++ = *wp1++;
- if (wp1[-1] != L'*' || wp1[-2] == L'\\')
- *wp++ = L'*';
- *wp = '\0';
- }
- else
- nwpat = wpat;
- len = wcsmatch (nwpat, wstring, FNMATCH_EXTFLAG);
- if (nwpat != wpat)
- free (nwpat);
- if (len == FNM_NOMATCH)
- return (0);
-
- mlen = wmatchlen (wpat, wstrlen);
-
-/* itrace("wmatchlen (%ls) -> %d", wpat, mlen); */
- switch (mtype)
- {
- case MATCH_ANY:
- for (n = 0; n <= wstrlen; n++)
- {
-#if 1
- n2 = simple ? (*wpat == wstring[n]) : match_pattern_wchar (wpat, wstring + n);
-#else
- n2 = match_pattern_wchar (wpat, wstring + n);
-#endif
- if (n2)
- {
-#if 0
- for (n1 = wstrlen; n1 >= n; n1--)
-#else
- n1 = (mlen == -1) ? wstrlen : n + mlen;
- if (n1 > wstrlen)
- break;
-
- for ( ; n1 >= n; n1--)
-#endif
- {
- wc = wstring[n1]; wstring[n1] = L'\0';
- if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0)
- {
- wstring[n1] = wc;
- *sp = indices[n];
- *ep = indices[n1];
- return 1;
- }
- wstring[n1] = wc;
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
- }
- }
-
- return (0);
-
- case MATCH_BEG:
- if (match_pattern_wchar (wpat, wstring) == 0)
- return (0);
-
-#if 0
- for (n = wstrlen; n >= 0; n--)
-#else
- for (n = (mlen == -1) ? wstrlen : mlen; n >= 0; n--)
-#endif
- {
- wc = wstring[n]; wstring[n] = L'\0';
- if (wcsmatch (wpat, wstring, FNMATCH_EXTFLAG) == 0)
- {
- wstring[n] = wc;
- *sp = indices[0];
- *ep = indices[n];
- return 1;
- }
- wstring[n] = wc;
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
-
- return (0);
-
- case MATCH_END:
-#if 0
- for (n = 0; n <= wstrlen; n++)
-#else
- for (n = wstrlen - ((mlen == -1) ? wstrlen : mlen); n <= wstrlen; n++)
-#endif
- {
- if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0)
- {
- *sp = indices[n];
- *ep = indices[wstrlen];
- return 1;
- }
-#if 1
- /* If MLEN != -1, we have a fixed length pattern. */
- if (mlen != -1)
- break;
-#endif
- }
-
- return (0);
- }
-
- return (0);
-}
-#endif /* HANDLE_MULTIBYTE */
-
-static int
-match_pattern (string, pat, mtype, sp, ep)
- char *string, *pat;
- int mtype;
- char **sp, **ep;
-{
-#if defined (HANDLE_MULTIBYTE)
- int ret;
- size_t n;
- wchar_t *wstring, *wpat;
- char **indices;
- size_t slen, plen, mslen, mplen;
-#endif
-
- if (string == 0 || *string == 0 || pat == 0 || *pat == 0)
- return (0);
-
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1)
- {
-#if 0
- slen = STRLEN (string);
- mslen = MBSLEN (string);
- plen = STRLEN (pat);
- mplen = MBSLEN (pat);
- if (slen == mslen && plen == mplen)
-#else
- if (mbsmbchar (string) == 0 && mbsmbchar (pat) == 0)
-#endif
- return (match_upattern (string, pat, mtype, sp, ep));
-
- n = xdupmbstowcs (&wpat, NULL, pat);
- if (n == (size_t)-1)
- return (match_upattern (string, pat, mtype, sp, ep));
- n = xdupmbstowcs (&wstring, &indices, string);
- if (n == (size_t)-1)
- {
- free (wpat);
- return (match_upattern (string, pat, mtype, sp, ep));
- }
- ret = match_wpattern (wstring, indices, n, wpat, mtype, sp, ep);
-
- free (wpat);
- free (wstring);
- free (indices);
-
- return (ret);
- }
- else
-#endif
- return (match_upattern (string, pat, mtype, sp, ep));
-}
-
-static int
-getpatspec (c, value)
- int c;
- char *value;
-{
- if (c == '#')
- return ((*value == '#') ? RP_LONG_LEFT : RP_SHORT_LEFT);
- else /* c == '%' */
- return ((*value == '%') ? RP_LONG_RIGHT : RP_SHORT_RIGHT);
-}
-
-/* Posix.2 says that the WORD should be run through tilde expansion,
- parameter expansion, command substitution and arithmetic expansion.
- This leaves the result quoted, so quote_string_for_globbing () has
- to be called to fix it up for strmatch (). If QUOTED is non-zero,
- it means that the entire expression was enclosed in double quotes.
- This means that quoting characters in the pattern do not make any
- special pattern characters quoted. For example, the `*' in the
- following retains its special meaning: "${foo#'*'}". */
-static char *
-getpattern (value, quoted, expandpat)
- char *value;
- int quoted, expandpat;
-{
- char *pat, *tword;
- WORD_LIST *l;
-#if 0
- int i;
-#endif
- /* There is a problem here: how to handle single or double quotes in the
- pattern string when the whole expression is between double quotes?
- POSIX.2 says that enclosing double quotes do not cause the pattern to
- be quoted, but does that leave us a problem with @ and array[@] and their
- expansions inside a pattern? */
-#if 0
- if (expandpat && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *tword)
- {
- i = 0;
- pat = string_extract_double_quoted (tword, &i, 1);
- free (tword);
- tword = pat;
- }
-#endif
-
- /* expand_string_for_rhs () leaves WORD quoted and does not perform
- word splitting. */
- l = *value ? expand_string_for_rhs (value,
- (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? Q_PATQUOTE : quoted,
- (int *)NULL, (int *)NULL)
- : (WORD_LIST *)0;
- pat = string_list (l);
- dispose_words (l);
- if (pat)
- {
- tword = quote_string_for_globbing (pat, QGLOB_CVTNULL);
- free (pat);
- pat = tword;
- }
- return (pat);
-}
-
-#if 0
-/* Handle removing a pattern from a string as a result of ${name%[%]value}
- or ${name#[#]value}. */
-static char *
-variable_remove_pattern (value, pattern, patspec, quoted)
- char *value, *pattern;
- int patspec, quoted;
-{
- char *tword;
-
- tword = remove_pattern (value, pattern, patspec);
-
- return (tword);
-}
-#endif
-
-static char *
-list_remove_pattern (list, pattern, patspec, itype, quoted)
- WORD_LIST *list;
- char *pattern;
- int patspec, itype, quoted;
-{
- WORD_LIST *new, *l;
- WORD_DESC *w;
- char *tword;
-
- for (new = (WORD_LIST *)NULL, l = list; l; l = l->next)
- {
- tword = remove_pattern (l->word->word, pattern, patspec);
- w = alloc_word_desc ();
- w->word = tword ? tword : savestring ("");
- new = make_word_list (w, new);
- }
-
- l = REVERSE_LIST (new, WORD_LIST *);
- tword = string_list_pos_params (itype, l, quoted);
- dispose_words (l);
-
- return (tword);
-}
-
-static char *
-parameter_list_remove_pattern (itype, pattern, patspec, quoted)
- int itype;
- char *pattern;
- int patspec, quoted;
-{
- char *ret;
- WORD_LIST *list;
-
- list = list_rest_of_args ();
- if (list == 0)
- return ((char *)NULL);
- ret = list_remove_pattern (list, pattern, patspec, itype, quoted);
- dispose_words (list);
- return (ret);
-}
-
-#if defined (ARRAY_VARS)
-static char *
-array_remove_pattern (var, pattern, patspec, varname, quoted)
- SHELL_VAR *var;
- char *pattern;
- int patspec;
- char *varname; /* so we can figure out how it's indexed */
- int quoted;
-{
- ARRAY *a;
- HASH_TABLE *h;
- int itype;
- char *ret;
- WORD_LIST *list;
- SHELL_VAR *v;
-
- /* compute itype from varname here */
- v = array_variable_part (varname, &ret, 0);
- itype = ret[0];
-
- a = (v && array_p (v)) ? array_cell (v) : 0;
- h = (v && assoc_p (v)) ? assoc_cell (v) : 0;
-
- list = a ? array_to_word_list (a) : (h ? assoc_to_word_list (h) : 0);
- if (list == 0)
- return ((char *)NULL);
- ret = list_remove_pattern (list, pattern, patspec, itype, quoted);
- dispose_words (list);
-
- return ret;
-}
-#endif /* ARRAY_VARS */
-
-static char *
-parameter_brace_remove_pattern (varname, value, ind, patstr, rtype, quoted, flags)
- char *varname, *value;
- int ind;
- char *patstr;
- int rtype, quoted, flags;
-{
- int vtype, patspec, starsub;
- char *temp1, *val, *pattern;
- SHELL_VAR *v;
-
- if (value == 0)
- return ((char *)NULL);
-
- this_command_name = varname;
-
- vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val);
- if (vtype == -1)
- return ((char *)NULL);
-
- starsub = vtype & VT_STARSUB;
- vtype &= ~VT_STARSUB;
-
- patspec = getpatspec (rtype, patstr);
- if (patspec == RP_LONG_LEFT || patspec == RP_LONG_RIGHT)
- patstr++;
-
- /* Need to pass getpattern newly-allocated memory in case of expansion --
- the expansion code will free the passed string on an error. */
- temp1 = savestring (patstr);
- pattern = getpattern (temp1, quoted, 1);
- free (temp1);
-
- temp1 = (char *)NULL; /* shut up gcc */
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
- temp1 = remove_pattern (val, pattern, patspec);
- if (vtype == VT_VARIABLE)
- FREE (val);
- if (temp1)
- {
- val = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- ? quote_string (temp1)
- : quote_escapes (temp1);
- free (temp1);
- temp1 = val;
- }
- break;
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- temp1 = array_remove_pattern (v, pattern, patspec, varname, quoted);
- if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0))
- {
- val = quote_escapes (temp1);
- free (temp1);
- temp1 = val;
- }
- break;
-#endif
- case VT_POSPARMS:
- temp1 = parameter_list_remove_pattern (varname[0], pattern, patspec, quoted);
- if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0))
- {
- val = quote_escapes (temp1);
- free (temp1);
- temp1 = val;
- }
- break;
- }
-
- FREE (pattern);
- return temp1;
-}
-
-/*******************************************
- * *
- * Functions to expand WORD_DESCs *
- * *
- *******************************************/
-
-/* Expand WORD, performing word splitting on the result. This does
- parameter expansion, command substitution, arithmetic expansion,
- word splitting, and quote removal. */
-
-WORD_LIST *
-expand_word (word, quoted)
- WORD_DESC *word;
- int quoted;
-{
- WORD_LIST *result, *tresult;
-
- tresult = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL);
- result = word_list_split (tresult);
- dispose_words (tresult);
- return (result ? dequote_list (result) : result);
-}
-
-/* Expand WORD, but do not perform word splitting on the result. This
- does parameter expansion, command substitution, arithmetic expansion,
- and quote removal. */
-WORD_LIST *
-expand_word_unsplit (word, quoted)
- WORD_DESC *word;
- int quoted;
-{
- WORD_LIST *result;
-
- expand_no_split_dollar_star = 1;
-#if defined (HANDLE_MULTIBYTE)
- if (ifs_firstc[0] == 0)
-#else
- if (ifs_firstc == 0)
-#endif
- word->flags |= W_NOSPLIT;
- word->flags |= W_NOSPLIT2;
- result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL);
- expand_no_split_dollar_star = 0;
-
- return (result ? dequote_list (result) : result);
-}
-
-/* Perform shell expansions on WORD, but do not perform word splitting or
- quote removal on the result. Virtually identical to expand_word_unsplit;
- could be combined if implementations don't diverge. */
-WORD_LIST *
-expand_word_leave_quoted (word, quoted)
- WORD_DESC *word;
- int quoted;
-{
- WORD_LIST *result;
-
- expand_no_split_dollar_star = 1;
-#if defined (HANDLE_MULTIBYTE)
- if (ifs_firstc[0] == 0)
-#else
- if (ifs_firstc == 0)
-#endif
- word->flags |= W_NOSPLIT;
- word->flags |= W_NOSPLIT2;
- result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL);
- expand_no_split_dollar_star = 0;
-
- return result;
-}
-
-#if defined (PROCESS_SUBSTITUTION)
-
-/*****************************************************************/
-/* */
-/* Hacking Process Substitution */
-/* */
-/*****************************************************************/
-
-#if !defined (HAVE_DEV_FD)
-/* Named pipes must be removed explicitly with `unlink'. This keeps a list
- of FIFOs the shell has open. unlink_fifo_list will walk the list and
- unlink all of them. add_fifo_list adds the name of an open FIFO to the
- list. NFIFO is a count of the number of FIFOs in the list. */
-#define FIFO_INCR 20
-
-struct temp_fifo {
- char *file;
- pid_t proc;
-};
-
-static struct temp_fifo *fifo_list = (struct temp_fifo *)NULL;
-static int nfifo;
-static int fifo_list_size;
-
-char *
-copy_fifo_list (sizep)
- int *sizep;
-{
- if (sizep)
- *sizep = 0;
- return (char *)NULL;
-}
-
-static void
-add_fifo_list (pathname)
- char *pathname;
-{
- if (nfifo >= fifo_list_size - 1)
- {
- fifo_list_size += FIFO_INCR;
- fifo_list = (struct temp_fifo *)xrealloc (fifo_list,
- fifo_list_size * sizeof (struct temp_fifo));
- }
-
- fifo_list[nfifo].file = savestring (pathname);
- nfifo++;
-}
-
-void
-unlink_fifo (i)
- int i;
-{
- if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1))
- {
- unlink (fifo_list[i].file);
- free (fifo_list[i].file);
- fifo_list[i].file = (char *)NULL;
- fifo_list[i].proc = -1;
- }
-}
-
-void
-unlink_fifo_list ()
-{
- int saved, i, j;
-
- if (nfifo == 0)
- return;
-
- for (i = saved = 0; i < nfifo; i++)
- {
- if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1))
- {
- unlink (fifo_list[i].file);
- free (fifo_list[i].file);
- fifo_list[i].file = (char *)NULL;
- fifo_list[i].proc = -1;
- }
- else
- saved++;
- }
-
- /* If we didn't remove some of the FIFOs, compact the list. */
- if (saved)
- {
- for (i = j = 0; i < nfifo; i++)
- if (fifo_list[i].file)
- {
- fifo_list[j].file = fifo_list[i].file;
- fifo_list[j].proc = fifo_list[i].proc;
- j++;
- }
- nfifo = j;
- }
- else
- nfifo = 0;
-}
-
-/* Take LIST, which is a bitmap denoting active FIFOs in fifo_list
- from some point in the past, and close all open FIFOs in fifo_list
- that are not marked as active in LIST. If LIST is NULL, close
- everything in fifo_list. LSIZE is the number of elements in LIST, in
- case it's larger than fifo_list_size (size of fifo_list). */
-void
-close_new_fifos (list, lsize)
- char *list;
- int lsize;
-{
- int i;
-
- if (list == 0)
- {
- unlink_fifo_list ();
- return;
- }
-
- for (i = 0; i < lsize; i++)
- if (list[i] == 0 && i < fifo_list_size && fifo_list[i].proc != -1)
- unlink_fifo (i);
-
- for (i = lsize; i < fifo_list_size; i++)
- unlink_fifo (i);
-}
-
-int
-fifos_pending ()
-{
- return nfifo;
-}
-
-int
-num_fifos ()
-{
- return nfifo;
-}
-
-static char *
-make_named_pipe ()
-{
- char *tname;
-
- tname = sh_mktmpname ("sh-np", MT_USERANDOM|MT_USETMPDIR);
- if (mkfifo (tname, 0600) < 0)
- {
- free (tname);
- return ((char *)NULL);
- }
-
- add_fifo_list (tname);
- return (tname);
-}
-
-#else /* HAVE_DEV_FD */
-
-/* DEV_FD_LIST is a bitmap of file descriptors attached to pipes the shell
- has open to children. NFDS is a count of the number of bits currently
- set in DEV_FD_LIST. TOTFDS is a count of the highest possible number
- of open files. */
-static char *dev_fd_list = (char *)NULL;
-static int nfds;
-static int totfds; /* The highest possible number of open files. */
-
-char *
-copy_fifo_list (sizep)
- int *sizep;
-{
- char *ret;
-
- if (nfds == 0 || totfds == 0)
- {
- if (sizep)
- *sizep = 0;
- return (char *)NULL;
- }
-
- if (sizep)
- *sizep = totfds;
- ret = (char *)xmalloc (totfds);
- return (memcpy (ret, dev_fd_list, totfds));
-}
-
-static void
-add_fifo_list (fd)
- int fd;
-{
- if (dev_fd_list == 0 || fd >= totfds)
- {
- int ofds;
-
- ofds = totfds;
- totfds = getdtablesize ();
- if (totfds < 0 || totfds > 256)
- totfds = 256;
- if (fd >= totfds)
- totfds = fd + 2;
-
- dev_fd_list = (char *)xrealloc (dev_fd_list, totfds);
- memset (dev_fd_list + ofds, '\0', totfds - ofds);
- }
-
- dev_fd_list[fd] = 1;
- nfds++;
-}
-
-int
-fifos_pending ()
-{
- return 0; /* used for cleanup; not needed with /dev/fd */
-}
-
-int
-num_fifos ()
-{
- return nfds;
-}
-
-void
-unlink_fifo (fd)
- int fd;
-{
- if (dev_fd_list[fd])
- {
- close (fd);
- dev_fd_list[fd] = 0;
- nfds--;
- }
-}
-
-void
-unlink_fifo_list ()
-{
- register int i;
-
- if (nfds == 0)
- return;
-
- for (i = 0; nfds && i < totfds; i++)
- unlink_fifo (i);
-
- nfds = 0;
-}
-
-/* Take LIST, which is a snapshot copy of dev_fd_list from some point in
- the past, and close all open fds in dev_fd_list that are not marked
- as open in LIST. If LIST is NULL, close everything in dev_fd_list.
- LSIZE is the number of elements in LIST, in case it's larger than
- totfds (size of dev_fd_list). */
-void
-close_new_fifos (list, lsize)
- char *list;
- int lsize;
-{
- int i;
-
- if (list == 0)
- {
- unlink_fifo_list ();
- return;
- }
-
- for (i = 0; i < lsize; i++)
- if (list[i] == 0 && i < totfds && dev_fd_list[i])
- unlink_fifo (i);
-
- for (i = lsize; i < totfds; i++)
- unlink_fifo (i);
-}
-
-#if defined (NOTDEF)
-print_dev_fd_list ()
-{
- register int i;
-
- fprintf (stderr, "pid %ld: dev_fd_list:", (long)getpid ());
- fflush (stderr);
-
- for (i = 0; i < totfds; i++)
- {
- if (dev_fd_list[i])
- fprintf (stderr, " %d", i);
- }
- fprintf (stderr, "\n");
-}
-#endif /* NOTDEF */
-
-static char *
-make_dev_fd_filename (fd)
- int fd;
-{
- char *ret, intbuf[INT_STRLEN_BOUND (int) + 1], *p;
-
- ret = (char *)xmalloc (sizeof (DEV_FD_PREFIX) + 8);
-
- strcpy (ret, DEV_FD_PREFIX);
- p = inttostr (fd, intbuf, sizeof (intbuf));
- strcpy (ret + sizeof (DEV_FD_PREFIX) - 1, p);
-
- add_fifo_list (fd);
- return (ret);
-}
-
-#endif /* HAVE_DEV_FD */
-
-/* Return a filename that will open a connection to the process defined by
- executing STRING. HAVE_DEV_FD, if defined, means open a pipe and return
- a filename in /dev/fd corresponding to a descriptor that is one of the
- ends of the pipe. If not defined, we use named pipes on systems that have
- them. Systems without /dev/fd and named pipes are out of luck.
-
- OPEN_FOR_READ_IN_CHILD, if 1, means open the named pipe for reading or
- use the read end of the pipe and dup that file descriptor to fd 0 in
- the child. If OPEN_FOR_READ_IN_CHILD is 0, we open the named pipe for
- writing or use the write end of the pipe in the child, and dup that
- file descriptor to fd 1 in the child. The parent does the opposite. */
-
-static char *
-process_substitute (string, open_for_read_in_child)
- char *string;
- int open_for_read_in_child;
-{
- char *pathname;
- int fd, result;
- pid_t old_pid, pid;
-#if defined (HAVE_DEV_FD)
- int parent_pipe_fd, child_pipe_fd;
- int fildes[2];
-#endif /* HAVE_DEV_FD */
-#if defined (JOB_CONTROL)
- pid_t old_pipeline_pgrp;
-#endif
-
- if (!string || !*string || wordexp_only)
- return ((char *)NULL);
-
-#if !defined (HAVE_DEV_FD)
- pathname = make_named_pipe ();
-#else /* HAVE_DEV_FD */
- if (pipe (fildes) < 0)
- {
- sys_error (_("cannot make pipe for process substitution"));
- return ((char *)NULL);
- }
- /* If OPEN_FOR_READ_IN_CHILD == 1, we want to use the write end of
- the pipe in the parent, otherwise the read end. */
- parent_pipe_fd = fildes[open_for_read_in_child];
- child_pipe_fd = fildes[1 - open_for_read_in_child];
- /* Move the parent end of the pipe to some high file descriptor, to
- avoid clashes with FDs used by the script. */
- parent_pipe_fd = move_to_high_fd (parent_pipe_fd, 1, 64);
-
- pathname = make_dev_fd_filename (parent_pipe_fd);
-#endif /* HAVE_DEV_FD */
-
- if (pathname == 0)
- {
- sys_error (_("cannot make pipe for process substitution"));
- return ((char *)NULL);
- }
-
- old_pid = last_made_pid;
-
-#if defined (JOB_CONTROL)
- old_pipeline_pgrp = pipeline_pgrp;
- pipeline_pgrp = shell_pgrp;
- save_pipeline (1);
-#endif /* JOB_CONTROL */
-
- pid = make_child ((char *)NULL, 1);
- if (pid == 0)
- {
- reset_terminating_signals (); /* XXX */
- free_pushed_string_input ();
- /* Cancel traps, in trap.c. */
- restore_original_signals (); /* XXX - what about special builtins? bash-4.2 */
- setup_async_signals ();
- subshell_environment |= SUBSHELL_COMSUB|SUBSHELL_PROCSUB;
- }
-
-#if defined (JOB_CONTROL)
- set_sigchld_handler ();
- stop_making_children ();
- /* XXX - should we only do this in the parent? (as in command subst) */
- pipeline_pgrp = old_pipeline_pgrp;
-#endif /* JOB_CONTROL */
-
- if (pid < 0)
- {
- sys_error (_("cannot make child for process substitution"));
- free (pathname);
-#if defined (HAVE_DEV_FD)
- close (parent_pipe_fd);
- close (child_pipe_fd);
-#endif /* HAVE_DEV_FD */
- return ((char *)NULL);
- }
-
- if (pid > 0)
- {
-#if defined (JOB_CONTROL)
- restore_pipeline (1);
-#endif
-
-#if !defined (HAVE_DEV_FD)
- fifo_list[nfifo-1].proc = pid;
-#endif
-
- last_made_pid = old_pid;
-
-#if defined (JOB_CONTROL) && defined (PGRP_PIPE)
- close_pgrp_pipe ();
-#endif /* JOB_CONTROL && PGRP_PIPE */
-
-#if defined (HAVE_DEV_FD)
- close (child_pipe_fd);
-#endif /* HAVE_DEV_FD */
-
- return (pathname);
- }
-
- set_sigint_handler ();
-
-#if defined (JOB_CONTROL)
- set_job_control (0);
-#endif /* JOB_CONTROL */
-
-#if !defined (HAVE_DEV_FD)
- /* Open the named pipe in the child. */
- fd = open (pathname, open_for_read_in_child ? O_RDONLY|O_NONBLOCK : O_WRONLY);
- if (fd < 0)
- {
- /* Two separate strings for ease of translation. */
- if (open_for_read_in_child)
- sys_error (_("cannot open named pipe %s for reading"), pathname);
- else
- sys_error (_("cannot open named pipe %s for writing"), pathname);
-
- exit (127);
- }
- if (open_for_read_in_child)
- {
- if (sh_unset_nodelay_mode (fd) < 0)
- {
- sys_error (_("cannot reset nodelay mode for fd %d"), fd);
- exit (127);
- }
- }
-#else /* HAVE_DEV_FD */
- fd = child_pipe_fd;
-#endif /* HAVE_DEV_FD */
-
- if (dup2 (fd, open_for_read_in_child ? 0 : 1) < 0)
- {
- sys_error (_("cannot duplicate named pipe %s as fd %d"), pathname,
- open_for_read_in_child ? 0 : 1);
- exit (127);
- }
-
- if (fd != (open_for_read_in_child ? 0 : 1))
- close (fd);
-
- /* Need to close any files that this process has open to pipes inherited
- from its parent. */
- if (current_fds_to_close)
- {
- close_fd_bitmap (current_fds_to_close);
- current_fds_to_close = (struct fd_bitmap *)NULL;
- }
-
-#if defined (HAVE_DEV_FD)
- /* Make sure we close the parent's end of the pipe and clear the slot
- in the fd list so it is not closed later, if reallocated by, for
- instance, pipe(2). */
- close (parent_pipe_fd);
- dev_fd_list[parent_pipe_fd] = 0;
-#endif /* HAVE_DEV_FD */
-
- result = parse_and_execute (string, "process substitution", (SEVAL_NONINT|SEVAL_NOHIST));
-
-#if !defined (HAVE_DEV_FD)
- /* Make sure we close the named pipe in the child before we exit. */
- close (open_for_read_in_child ? 0 : 1);
-#endif /* !HAVE_DEV_FD */
-
- exit (result);
- /*NOTREACHED*/
-}
-#endif /* PROCESS_SUBSTITUTION */
-
-/***********************************/
-/* */
-/* Command Substitution */
-/* */
-/***********************************/
-
-static char *
-read_comsub (fd, quoted, rflag)
- int fd, quoted;
- int *rflag;
-{
- char *istring, buf[128], *bufp, *s;
- int istring_index, istring_size, c, tflag, skip_ctlesc, skip_ctlnul;
- ssize_t bufn;
-
- istring = (char *)NULL;
- istring_index = istring_size = bufn = tflag = 0;
-
- for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++)
- skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL;
-
- /* Read the output of the command through the pipe. This may need to be
- changed to understand multibyte characters in the future. */
- while (1)
- {
- if (fd < 0)
- break;
- if (--bufn <= 0)
- {
- bufn = zread (fd, buf, sizeof (buf));
- if (bufn <= 0)
- break;
- bufp = buf;
- }
- c = *bufp++;
-
- if (c == 0)
- {
-#if 0
- internal_warning ("read_comsub: ignored null byte in input");
-#endif
- continue;
- }
-
- /* Add the character to ISTRING, possibly after resizing it. */
- RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, DEFAULT_ARRAY_SIZE);
-
- /* This is essentially quote_string inline */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) /* || c == CTLESC || c == CTLNUL */)
- istring[istring_index++] = CTLESC;
- /* Escape CTLESC and CTLNUL in the output to protect those characters
- from the rest of the word expansions (word splitting and globbing.)
- This is essentially quote_escapes inline. */
- else if (skip_ctlesc == 0 && c == CTLESC)
- {
- tflag |= W_HASCTLESC;
- istring[istring_index++] = CTLESC;
- }
- else if ((skip_ctlnul == 0 && c == CTLNUL) || (c == ' ' && (ifs_value && *ifs_value == 0)))
- istring[istring_index++] = CTLESC;
-
- istring[istring_index++] = c;
-
-#if 0
-#if defined (__CYGWIN__)
- if (c == '\n' && istring_index > 1 && istring[istring_index - 2] == '\r')
- {
- istring_index--;
- istring[istring_index - 1] = '\n';
- }
-#endif
-#endif
- }
-
- if (istring)
- istring[istring_index] = '\0';
-
- /* If we read no output, just return now and save ourselves some
- trouble. */
- if (istring_index == 0)
- {
- FREE (istring);
- if (rflag)
- *rflag = tflag;
- return (char *)NULL;
- }
-
- /* Strip trailing newlines from the output of the command. */
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- {
- while (istring_index > 0)
- {
- if (istring[istring_index - 1] == '\n')
- {
- --istring_index;
-
- /* If the newline was quoted, remove the quoting char. */
- if (istring[istring_index - 1] == CTLESC)
- --istring_index;
- }
- else
- break;
- }
- istring[istring_index] = '\0';
- }
- else
- strip_trailing (istring, istring_index - 1, 1);
-
- if (rflag)
- *rflag = tflag;
- return istring;
-}
-
-/* Perform command substitution on STRING. This returns a WORD_DESC * with the
- contained string possibly quoted. */
-WORD_DESC *
-command_substitute (string, quoted)
- char *string;
- int quoted;
-{
- pid_t pid, old_pid, old_pipeline_pgrp, old_async_pid;
- char *istring;
- int result, fildes[2], function_value, pflags, rc, tflag;
- WORD_DESC *ret;
-
- istring = (char *)NULL;
-
- /* Don't fork () if there is no need to. In the case of no command to
- run, just return NULL. */
- if (!string || !*string || (string[0] == '\n' && !string[1]))
- return ((WORD_DESC *)NULL);
-
- if (wordexp_only && read_but_dont_execute)
- {
- last_command_exit_value = EX_WEXPCOMSUB;
- jump_to_top_level (EXITPROG);
- }
-
- /* We're making the assumption here that the command substitution will
- eventually run a command from the file system. Since we'll run
- maybe_make_export_env in this subshell before executing that command,
- the parent shell and any other shells it starts will have to remake
- the environment. If we make it before we fork, other shells won't
- have to. Don't bother if we have any temporary variable assignments,
- though, because the export environment will be remade after this
- command completes anyway, but do it if all the words to be expanded
- are variable assignments. */
- if (subst_assign_varlist == 0 || garglist == 0)
- maybe_make_export_env (); /* XXX */
-
- /* Flags to pass to parse_and_execute() */
- pflags = (interactive && sourcelevel == 0) ? SEVAL_RESETLINE : 0;
-
- /* Pipe the output of executing STRING into the current shell. */
- if (pipe (fildes) < 0)
- {
- sys_error (_("cannot make pipe for command substitution"));
- goto error_exit;
- }
-
- old_pid = last_made_pid;
-#if defined (JOB_CONTROL)
- old_pipeline_pgrp = pipeline_pgrp;
- /* Don't reset the pipeline pgrp if we're already a subshell in a pipeline. */
- if ((subshell_environment & SUBSHELL_PIPE) == 0)
- pipeline_pgrp = shell_pgrp;
- cleanup_the_pipeline ();
-#endif /* JOB_CONTROL */
-
- old_async_pid = last_asynchronous_pid;
- pid = make_child ((char *)NULL, subshell_environment&SUBSHELL_ASYNC);
- last_asynchronous_pid = old_async_pid;
-
- if (pid == 0)
- {
- /* Reset the signal handlers in the child, but don't free the
- trap strings. Set a flag noting that we have to free the
- trap strings if we run trap to change a signal disposition. */
- reset_signal_handlers ();
- subshell_environment |= SUBSHELL_RESETTRAP;
- }
-
-#if defined (JOB_CONTROL)
- /* XXX DO THIS ONLY IN PARENT ? XXX */
- set_sigchld_handler ();
- stop_making_children ();
- if (pid != 0)
- pipeline_pgrp = old_pipeline_pgrp;
-#else
- stop_making_children ();
-#endif /* JOB_CONTROL */
-
- if (pid < 0)
- {
- sys_error (_("cannot make child for command substitution"));
- error_exit:
-
- FREE (istring);
- close (fildes[0]);
- close (fildes[1]);
- return ((WORD_DESC *)NULL);
- }
-
- if (pid == 0)
- {
- set_sigint_handler (); /* XXX */
-
- free_pushed_string_input ();
-
- if (dup2 (fildes[1], 1) < 0)
- {
- sys_error (_("command_substitute: cannot duplicate pipe as fd 1"));
- exit (EXECUTION_FAILURE);
- }
-
- /* If standard output is closed in the parent shell
- (such as after `exec >&-'), file descriptor 1 will be
- the lowest available file descriptor, and end up in
- fildes[0]. This can happen for stdin and stderr as well,
- but stdout is more important -- it will cause no output
- to be generated from this command. */
- if ((fildes[1] != fileno (stdin)) &&
- (fildes[1] != fileno (stdout)) &&
- (fildes[1] != fileno (stderr)))
- close (fildes[1]);
-
- if ((fildes[0] != fileno (stdin)) &&
- (fildes[0] != fileno (stdout)) &&
- (fildes[0] != fileno (stderr)))
- close (fildes[0]);
-
-#ifdef __CYGWIN__
- /* Let stdio know the fd may have changed from text to binary mode, and
- make sure to preserve stdout line buffering. */
- freopen (NULL, "w", stdout);
- sh_setlinebuf (stdout);
-#endif /* __CYGWIN__ */
-
- /* The currently executing shell is not interactive. */
- interactive = 0;
-
- /* This is a subshell environment. */
- subshell_environment |= SUBSHELL_COMSUB;
-
- /* When not in POSIX mode, command substitution does not inherit
- the -e flag. */
- if (posixly_correct == 0)
- exit_immediately_on_error = 0;
-
- remove_quoted_escapes (string);
-
- startup_state = 2; /* see if we can avoid a fork */
- /* Give command substitution a place to jump back to on failure,
- so we don't go back up to main (). */
- result = setjmp (top_level);
-
- /* If we're running a command substitution inside a shell function,
- trap `return' so we don't return from the function in the subshell
- and go off to never-never land. */
- if (result == 0 && return_catch_flag)
- function_value = setjmp (return_catch);
- else
- function_value = 0;
-
- if (result == ERREXIT)
- rc = last_command_exit_value;
- else if (result == EXITPROG)
- rc = last_command_exit_value;
- else if (result)
- rc = EXECUTION_FAILURE;
- else if (function_value)
- rc = return_catch_value;
- else
- {
- subshell_level++;
- rc = parse_and_execute (string, "command substitution", pflags|SEVAL_NOHIST);
- subshell_level--;
- }
-
- last_command_exit_value = rc;
- rc = run_exit_trap ();
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif
- exit (rc);
- }
- else
- {
-#if defined (JOB_CONTROL) && defined (PGRP_PIPE)
- close_pgrp_pipe ();
-#endif /* JOB_CONTROL && PGRP_PIPE */
-
- close (fildes[1]);
-
- tflag = 0;
- istring = read_comsub (fildes[0], quoted, &tflag);
-
- close (fildes[0]);
-
- current_command_subst_pid = pid;
- last_command_exit_value = wait_for (pid);
- last_command_subst_pid = pid;
- last_made_pid = old_pid;
-
-#if defined (JOB_CONTROL)
- /* If last_command_exit_value > 128, then the substituted command
- was terminated by a signal. If that signal was SIGINT, then send
- SIGINT to ourselves. This will break out of loops, for instance. */
- if (last_command_exit_value == (128 + SIGINT) && last_command_exit_signal == SIGINT)
- kill (getpid (), SIGINT);
-
- /* wait_for gives the terminal back to shell_pgrp. If some other
- process group should have it, give it away to that group here.
- pipeline_pgrp is non-zero only while we are constructing a
- pipline, so what we are concerned about is whether or not that
- pipeline was started in the background. A pipeline started in
- the background should never get the tty back here. */
- if (interactive && pipeline_pgrp != (pid_t)0 && (subshell_environment & SUBSHELL_ASYNC) == 0)
- give_terminal_to (pipeline_pgrp, 0);
-#endif /* JOB_CONTROL */
-
- ret = alloc_word_desc ();
- ret->word = istring;
- ret->flags = tflag;
-
- return ret;
- }
-}
-
-/********************************************************
- * *
- * Utility functions for parameter expansion *
- * *
- ********************************************************/
-
-#if defined (ARRAY_VARS)
-
-static arrayind_t
-array_length_reference (s)
- char *s;
-{
- int len;
- arrayind_t ind;
- char *akey;
- char *t, c;
- ARRAY *array;
- HASH_TABLE *h;
- SHELL_VAR *var;
-
- var = array_variable_part (s, &t, &len);
-
- /* If unbound variables should generate an error, report one and return
- failure. */
- if ((var == 0 || (assoc_p (var) == 0 && array_p (var) == 0)) && unbound_vars_is_error)
- {
- c = *--t;
- *t = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (s);
- *t = c;
- return (-1);
- }
- else if (var == 0)
- return 0;
-
- /* We support a couple of expansions for variables that are not arrays.
- We'll return the length of the value for v[0], and 1 for v[@] or
- v[*]. Return 0 for everything else. */
-
- array = array_p (var) ? array_cell (var) : (ARRAY *)NULL;
- h = assoc_p (var) ? assoc_cell (var) : (HASH_TABLE *)NULL;
-
- if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']')
- {
- if (assoc_p (var))
- return (h ? assoc_num_elements (h) : 0);
- else if (array_p (var))
- return (array ? array_num_elements (array) : 0);
- else
- return (var_isset (var) ? 1 : 0);
- }
-
- if (assoc_p (var))
- {
- t[len - 1] = '\0';
- akey = expand_assignment_string_to_string (t, 0); /* [ */
- t[len - 1] = ']';
- if (akey == 0 || *akey == 0)
- {
- err_badarraysub (t);
- return (-1);
- }
- t = assoc_reference (assoc_cell (var), akey);
- }
- else
- {
- ind = array_expand_index (var, t, len);
- if (ind < 0)
- {
- err_badarraysub (t);
- return (-1);
- }
- if (array_p (var))
- t = array_reference (array, ind);
- else
- t = (ind == 0) ? value_cell (var) : (char *)NULL;
- }
-
- len = MB_STRLEN (t);
- return (len);
-}
-#endif /* ARRAY_VARS */
-
-static int
-valid_brace_expansion_word (name, var_is_special)
- char *name;
- int var_is_special;
-{
- if (DIGIT (*name) && all_digits (name))
- return 1;
- else if (var_is_special)
- return 1;
-#if defined (ARRAY_VARS)
- else if (valid_array_reference (name))
- return 1;
-#endif /* ARRAY_VARS */
- else if (legal_identifier (name))
- return 1;
- else
- return 0;
-}
-
-static int
-chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at)
- char *name;
- int quoted;
- int *quoted_dollar_atp, *contains_dollar_at;
-{
- char *temp1;
-
- if (name == 0)
- {
- if (quoted_dollar_atp)
- *quoted_dollar_atp = 0;
- if (contains_dollar_at)
- *contains_dollar_at = 0;
- return 0;
- }
-
- /* check for $@ and $* */
- if (name[0] == '@' && name[1] == 0)
- {
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- return 1;
- }
- else if (name[0] == '*' && name[1] == '\0' && quoted == 0)
- {
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- return 1;
- }
-
- /* Now check for ${array[@]} and ${array[*]} */
-#if defined (ARRAY_VARS)
- else if (valid_array_reference (name))
- {
- temp1 = mbschr (name, '[');
- if (temp1 && temp1[1] == '@' && temp1[2] == ']')
- {
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- return 1;
- } /* [ */
- /* ${array[*]}, when unquoted, should be treated like ${array[@]},
- which should result in separate words even when IFS is unset. */
- if (temp1 && temp1[1] == '*' && temp1[2] == ']' && quoted == 0)
- {
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- return 1;
- }
- }
-#endif
- return 0;
-}
-
-/* Parameter expand NAME, and return a new string which is the expansion,
- or NULL if there was no expansion.
- VAR_IS_SPECIAL is non-zero if NAME is one of the special variables in
- the shell, e.g., "@", "$", "*", etc. QUOTED, if non-zero, means that
- NAME was found inside of a double-quoted expression. */
-static WORD_DESC *
-parameter_brace_expand_word (name, var_is_special, quoted, pflags, indp)
- char *name;
- int var_is_special, quoted, pflags;
- arrayind_t *indp;
-{
- WORD_DESC *ret;
- char *temp, *tt;
- intmax_t arg_index;
- SHELL_VAR *var;
- int atype, rflags;
- arrayind_t ind;
-
- ret = 0;
- temp = 0;
- rflags = 0;
-
- if (indp)
- *indp = INTMAX_MIN;
-
- /* Handle multiple digit arguments, as in ${11}. */
- if (legal_number (name, &arg_index))
- {
- tt = get_dollar_var_value (arg_index);
- if (tt)
- temp = (*tt && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- ? quote_string (tt)
- : quote_escapes (tt);
- else
- temp = (char *)NULL;
- FREE (tt);
- }
- else if (var_is_special) /* ${@} */
- {
- int sindex;
- tt = (char *)xmalloc (2 + strlen (name));
- tt[sindex = 0] = '$';
- strcpy (tt + 1, name);
-
- ret = param_expand (tt, &sindex, quoted, (int *)NULL, (int *)NULL,
- (int *)NULL, (int *)NULL, pflags);
- free (tt);
- }
-#if defined (ARRAY_VARS)
- else if (valid_array_reference (name))
- {
- temp = array_value (name, quoted, 0, &atype, &ind);
- if (atype == 0 && temp)
- {
- temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- ? quote_string (temp)
- : quote_escapes (temp);
- rflags |= W_ARRAYIND;
- if (indp)
- *indp = ind;
- }
- else if (atype == 1 && temp && QUOTED_NULL (temp) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- rflags |= W_HASQUOTEDNULL;
- }
-#endif
- else if (var = find_variable (name))
- {
- if (var_isset (var) && invisible_p (var) == 0)
- {
-#if defined (ARRAY_VARS)
- if (assoc_p (var))
- temp = assoc_reference (assoc_cell (var), "0");
- else if (array_p (var))
- temp = array_reference (array_cell (var), 0);
- else
- temp = value_cell (var);
-#else
- temp = value_cell (var);
-#endif
-
- if (temp)
- temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- ? quote_string (temp)
- : quote_escapes (temp);
- }
- else
- temp = (char *)NULL;
- }
- else
- temp = (char *)NULL;
-
- if (ret == 0)
- {
- ret = alloc_word_desc ();
- ret->word = temp;
- ret->flags |= rflags;
- }
- return ret;
-}
-
-/* Expand an indirect reference to a variable: ${!NAME} expands to the
- value of the variable whose name is the value of NAME. */
-static WORD_DESC *
-parameter_brace_expand_indir (name, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at)
- char *name;
- int var_is_special, quoted;
- int *quoted_dollar_atp, *contains_dollar_at;
-{
- char *temp, *t;
- WORD_DESC *w;
-
- w = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND, 0);
- t = w->word;
- /* Have to dequote here if necessary */
- if (t)
- {
- temp = (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- ? dequote_string (t)
- : dequote_escapes (t);
- free (t);
- t = temp;
- }
- dispose_word_desc (w);
-
- chk_atstar (t, quoted, quoted_dollar_atp, contains_dollar_at);
- if (t == 0)
- return (WORD_DESC *)NULL;
-
- w = parameter_brace_expand_word (t, SPECIAL_VAR(t, 0), quoted, 0, 0);
- free (t);
-
- return w;
-}
-
-/* Expand the right side of a parameter expansion of the form ${NAMEcVALUE},
- depending on the value of C, the separating character. C can be one of
- "-", "+", or "=". QUOTED is true if the entire brace expression occurs
- between double quotes. */
-static WORD_DESC *
-parameter_brace_expand_rhs (name, value, c, quoted, qdollaratp, hasdollarat)
- char *name, *value;
- int c, quoted, *qdollaratp, *hasdollarat;
-{
- WORD_DESC *w;
- WORD_LIST *l;
- char *t, *t1, *temp;
- int hasdol;
-
- /* If the entire expression is between double quotes, we want to treat
- the value as a double-quoted string, with the exception that we strip
- embedded unescaped double quotes (for sh backwards compatibility). */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *value)
- {
- hasdol = 0;
- temp = string_extract_double_quoted (value, &hasdol, 1);
- }
- else
- temp = value;
-
- w = alloc_word_desc ();
- hasdol = 0;
- /* XXX was 0 not quoted */
- l = *temp ? expand_string_for_rhs (temp, quoted, &hasdol, (int *)NULL)
- : (WORD_LIST *)0;
- if (hasdollarat)
- *hasdollarat = hasdol || (l && l->next);
- if (temp != value)
- free (temp);
- if (l)
- {
- /* The expansion of TEMP returned something. We need to treat things
- slightly differently if HASDOL is non-zero. If we have "$@", the
- individual words have already been quoted. We need to turn them
- into a string with the words separated by the first character of
- $IFS without any additional quoting, so string_list_dollar_at won't
- do the right thing. We use string_list_dollar_star instead. */
- temp = (hasdol || l->next) ? string_list_dollar_star (l) : string_list (l);
-
- /* If l->next is not null, we know that TEMP contained "$@", since that
- is the only expansion that creates more than one word. */
- if (qdollaratp && ((hasdol && quoted) || l->next))
- *qdollaratp = 1;
- dispose_words (l);
- }
- else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && hasdol)
- {
- /* The brace expansion occurred between double quotes and there was
- a $@ in TEMP. It does not matter if the $@ is quoted, as long as
- it does not expand to anything. In this case, we want to return
- a quoted empty string. */
- temp = make_quoted_char ('\0');
- w->flags |= W_HASQUOTEDNULL;
- }
- else
- temp = (char *)NULL;
-
- if (c == '-' || c == '+')
- {
- w->word = temp;
- return w;
- }
-
- /* c == '=' */
- t = temp ? savestring (temp) : savestring ("");
- t1 = dequote_string (t);
- free (t);
-#if defined (ARRAY_VARS)
- if (valid_array_reference (name))
- assign_array_element (name, t1, 0);
- else
-#endif /* ARRAY_VARS */
- bind_variable (name, t1, 0);
-
- /* From Posix group discussion Feb-March 2010. Issue 7 0000221 */
- free (temp);
-
- w->word = t1;
- return w;
-}
-
-/* Deal with the right hand side of a ${name:?value} expansion in the case
- that NAME is null or not set. If VALUE is non-null it is expanded and
- used as the error message to print, otherwise a standard message is
- printed. */
-static void
-parameter_brace_expand_error (name, value)
- char *name, *value;
-{
- WORD_LIST *l;
- char *temp;
-
- if (value && *value)
- {
- l = expand_string (value, 0);
- temp = string_list (l);
- report_error ("%s: %s", name, temp ? temp : ""); /* XXX was value not "" */
- FREE (temp);
- dispose_words (l);
- }
- else
- report_error (_("%s: parameter null or not set"), name);
-
- /* Free the data we have allocated during this expansion, since we
- are about to longjmp out. */
- free (name);
- FREE (value);
-}
-
-/* Return 1 if NAME is something for which parameter_brace_expand_length is
- OK to do. */
-static int
-valid_length_expression (name)
- char *name;
-{
- return (name[1] == '\0' || /* ${#} */
- ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0') || /* special param */
- (DIGIT (name[1]) && all_digits (name + 1)) || /* ${#11} */
-#if defined (ARRAY_VARS)
- valid_array_reference (name + 1) || /* ${#a[7]} */
-#endif
- legal_identifier (name + 1)); /* ${#PS1} */
-}
-
-/* Handle the parameter brace expansion that requires us to return the
- length of a parameter. */
-static intmax_t
-parameter_brace_expand_length (name)
- char *name;
-{
- char *t, *newname;
- intmax_t number, arg_index;
- WORD_LIST *list;
-#if defined (ARRAY_VARS)
- SHELL_VAR *var;
-#endif
-
- if (name[1] == '\0') /* ${#} */
- number = number_of_args ();
- else if ((name[1] == '@' || name[1] == '*') && name[2] == '\0') /* ${#@}, ${#*} */
- number = number_of_args ();
- else if ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0')
- {
- /* Take the lengths of some of the shell's special parameters. */
- switch (name[1])
- {
- case '-':
- t = which_set_flags ();
- break;
- case '?':
- t = itos (last_command_exit_value);
- break;
- case '$':
- t = itos (dollar_dollar_pid);
- break;
- case '!':
- if (last_asynchronous_pid == NO_PID)
- t = (char *)NULL; /* XXX - error if set -u set? */
- else
- t = itos (last_asynchronous_pid);
- break;
- case '#':
- t = itos (number_of_args ());
- break;
- }
- number = STRLEN (t);
- FREE (t);
- }
-#if defined (ARRAY_VARS)
- else if (valid_array_reference (name + 1))
- number = array_length_reference (name + 1);
-#endif /* ARRAY_VARS */
- else
- {
- number = 0;
-
- if (legal_number (name + 1, &arg_index)) /* ${#1} */
- {
- t = get_dollar_var_value (arg_index);
- if (t == 0 && unbound_vars_is_error)
- return INTMAX_MIN;
- number = MB_STRLEN (t);
- FREE (t);
- }
-#if defined (ARRAY_VARS)
- else if ((var = find_variable (name + 1)) && (invisible_p (var) == 0) && (array_p (var) || assoc_p (var)))
- {
- if (assoc_p (var))
- t = assoc_reference (assoc_cell (var), "0");
- else
- t = array_reference (array_cell (var), 0);
- if (t == 0 && unbound_vars_is_error)
- return INTMAX_MIN;
- number = MB_STRLEN (t);
- }
-#endif
- else /* ${#PS1} */
- {
- newname = savestring (name);
- newname[0] = '$';
- list = expand_string (newname, Q_DOUBLE_QUOTES);
- t = list ? string_list (list) : (char *)NULL;
- free (newname);
- if (list)
- dispose_words (list);
-
- number = t ? MB_STRLEN (t) : 0;
- FREE (t);
- }
- }
-
- return (number);
-}
-
-/* Skip characters in SUBSTR until DELIM. SUBSTR is an arithmetic expression,
- so we do some ad-hoc parsing of an arithmetic expression to find
- the first DELIM, instead of using strchr(3). Two rules:
- 1. If the substring contains a `(', read until closing `)'.
- 2. If the substring contains a `?', read past one `:' for each `?'.
-*/
-
-static char *
-skiparith (substr, delim)
- char *substr;
- int delim;
-{
- size_t sublen;
- int skipcol, pcount, i;
- DECLARE_MBSTATE;
-
- sublen = strlen (substr);
- i = skipcol = pcount = 0;
- while (substr[i])
- {
- /* Balance parens */
- if (substr[i] == LPAREN)
- {
- pcount++;
- i++;
- continue;
- }
- if (substr[i] == RPAREN && pcount)
- {
- pcount--;
- i++;
- continue;
- }
- if (pcount)
- {
- ADVANCE_CHAR (substr, sublen, i);
- continue;
- }
-
- /* Skip one `:' for each `?' */
- if (substr[i] == ':' && skipcol)
- {
- skipcol--;
- i++;
- continue;
- }
- if (substr[i] == delim)
- break;
- if (substr[i] == '?')
- {
- skipcol++;
- i++;
- continue;
- }
- ADVANCE_CHAR (substr, sublen, i);
- }
-
- return (substr + i);
-}
-
-/* Verify and limit the start and end of the desired substring. If
- VTYPE == 0, a regular shell variable is being used; if it is 1,
- then the positional parameters are being used; if it is 2, then
- VALUE is really a pointer to an array variable that should be used.
- Return value is 1 if both values were OK, 0 if there was a problem
- with an invalid expression, or -1 if the values were out of range. */
-static int
-verify_substring_values (v, value, substr, vtype, e1p, e2p)
- SHELL_VAR *v;
- char *value, *substr;
- int vtype;
- intmax_t *e1p, *e2p;
-{
- char *t, *temp1, *temp2;
- arrayind_t len;
- int expok;
-#if defined (ARRAY_VARS)
- ARRAY *a;
- HASH_TABLE *h;
-#endif
-
- /* duplicate behavior of strchr(3) */
- t = skiparith (substr, ':');
- if (*t && *t == ':')
- *t = '\0';
- else
- t = (char *)0;
-
- temp1 = expand_arith_string (substr, Q_DOUBLE_QUOTES);
- *e1p = evalexp (temp1, &expok);
- free (temp1);
- if (expok == 0)
- return (0);
-
- len = -1; /* paranoia */
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
- len = MB_STRLEN (value);
- break;
- case VT_POSPARMS:
- len = number_of_args () + 1;
- if (*e1p == 0)
- len++; /* add one arg if counting from $0 */
- break;
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- /* For arrays, the first value deals with array indices. Negative
- offsets count from one past the array's maximum index. Associative
- arrays treat the number of elements as the maximum index. */
- if (assoc_p (v))
- {
- h = assoc_cell (v);
- len = assoc_num_elements (h) + (*e1p < 0);
- }
- else
- {
- a = (ARRAY *)value;
- len = array_max_index (a) + (*e1p < 0); /* arrays index from 0 to n - 1 */
- }
- break;
-#endif
- }
-
- if (len == -1) /* paranoia */
- return -1;
-
- if (*e1p < 0) /* negative offsets count from end */
- *e1p += len;
-
- if (*e1p > len || *e1p < 0)
- return (-1);
-
-#if defined (ARRAY_VARS)
- /* For arrays, the second offset deals with the number of elements. */
- if (vtype == VT_ARRAYVAR)
- len = assoc_p (v) ? assoc_num_elements (h) : array_num_elements (a);
-#endif
-
- if (t)
- {
- t++;
- temp2 = savestring (t);
- temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES);
- free (temp2);
- t[-1] = ':';
- *e2p = evalexp (temp1, &expok);
- free (temp1);
- if (expok == 0)
- return (0);
- if ((vtype == VT_ARRAYVAR || vtype == VT_POSPARMS) && *e2p < 0)
- {
- internal_error (_("%s: substring expression < 0"), t);
- return (0);
- }
-#if defined (ARRAY_VARS)
- /* In order to deal with sparse arrays, push the intelligence about how
- to deal with the number of elements desired down to the array-
- specific functions. */
- if (vtype != VT_ARRAYVAR)
-#endif
- {
- if (*e2p < 0)
- {
- *e2p += len;
- if (*e2p < 0 || *e2p < *e1p)
- {
- internal_error (_("%s: substring expression < 0"), t);
- return (0);
- }
- }
- else
- *e2p += *e1p; /* want E2 chars starting at E1 */
- if (*e2p > len)
- *e2p = len;
- }
- }
- else
- *e2p = len;
-
- return (1);
-}
-
-/* Return the type of variable specified by VARNAME (simple variable,
- positional param, or array variable). Also return the value specified
- by VARNAME (value of a variable or a reference to an array element).
- QUOTED is the standard description of quoting state, using Q_* defines.
- FLAGS is currently a set of flags to pass to array_value. If IND is
- non-null and not INTMAX_MIN, and FLAGS includes AV_USEIND, IND is
- passed to array_value so the array index is not computed again.
- If this returns VT_VARIABLE, the caller assumes that CTLESC and CTLNUL
- characters in the value are quoted with CTLESC and takes appropriate
- steps. For convenience, *VALP is set to the dequoted VALUE. */
-static int
-get_var_and_type (varname, value, ind, quoted, flags, varp, valp)
- char *varname, *value;
- arrayind_t ind;
- int quoted, flags;
- SHELL_VAR **varp;
- char **valp;
-{
- int vtype;
- char *temp;
-#if defined (ARRAY_VARS)
- SHELL_VAR *v;
-#endif
- arrayind_t lind;
-
- /* This sets vtype to VT_VARIABLE or VT_POSPARMS */
- vtype = (varname[0] == '@' || varname[0] == '*') && varname[1] == '\0';
- if (vtype == VT_POSPARMS && varname[0] == '*')
- vtype |= VT_STARSUB;
- *varp = (SHELL_VAR *)NULL;
-
-#if defined (ARRAY_VARS)
- if (valid_array_reference (varname))
- {
- v = array_variable_part (varname, &temp, (int *)0);
- /* If we want to signal array_value to use an already-computed index,
- set LIND to that index */
- lind = (ind != INTMAX_MIN && (flags & AV_USEIND)) ? ind : 0;
- if (v && (array_p (v) || assoc_p (v)))
- { /* [ */
- if (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']')
- {
- /* Callers have to differentiate betwen indexed and associative */
- vtype = VT_ARRAYVAR;
- if (temp[0] == '*')
- vtype |= VT_STARSUB;
- *valp = array_p (v) ? (char *)array_cell (v) : (char *)assoc_cell (v);
- }
- else
- {
- vtype = VT_ARRAYMEMBER;
- *valp = array_value (varname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind);
- }
- *varp = v;
- }
- else if (v && (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']'))
- {
- vtype = VT_VARIABLE;
- *varp = v;
- if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- *valp = dequote_string (value);
- else
- *valp = dequote_escapes (value);
- }
- else
- {
- vtype = VT_ARRAYMEMBER;
- *varp = v;
- *valp = array_value (varname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind);
- }
- }
- else if ((v = find_variable (varname)) && (invisible_p (v) == 0) && (assoc_p (v) || array_p (v)))
- {
- vtype = VT_ARRAYMEMBER;
- *varp = v;
- *valp = assoc_p (v) ? assoc_reference (assoc_cell (v), "0") : array_reference (array_cell (v), 0);
- }
- else
-#endif
- {
- if (value && vtype == VT_VARIABLE)
- {
- if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- *valp = dequote_string (value);
- else
- *valp = dequote_escapes (value);
- }
- else
- *valp = value;
- }
-
- return vtype;
-}
-
-/******************************************************/
-/* */
-/* Functions to extract substrings of variable values */
-/* */
-/******************************************************/
-
-#if defined (HANDLE_MULTIBYTE)
-/* Character-oriented rather than strictly byte-oriented substrings. S and
- E, rather being strict indices into STRING, indicate character (possibly
- multibyte character) positions that require calculation.
- Used by the ${param:offset[:length]} expansion. */
-static char *
-mb_substring (string, s, e)
- char *string;
- int s, e;
-{
- char *tt;
- int start, stop, i, slen;
- DECLARE_MBSTATE;
-
- start = 0;
- /* Don't need string length in ADVANCE_CHAR unless multibyte chars possible. */
- slen = (MB_CUR_MAX > 1) ? STRLEN (string) : 0;
-
- i = s;
- while (string[start] && i--)
- ADVANCE_CHAR (string, slen, start);
- stop = start;
- i = e - s;
- while (string[stop] && i--)
- ADVANCE_CHAR (string, slen, stop);
- tt = substring (string, start, stop);
- return tt;
-}
-#endif
-
-/* Process a variable substring expansion: ${name:e1[:e2]}. If VARNAME
- is `@', use the positional parameters; otherwise, use the value of
- VARNAME. If VARNAME is an array variable, use the array elements. */
-
-static char *
-parameter_brace_substring (varname, value, ind, substr, quoted, flags)
- char *varname, *value;
- int ind;
- char *substr;
- int quoted, flags;
-{
- intmax_t e1, e2;
- int vtype, r, starsub;
- char *temp, *val, *tt, *oname;
- SHELL_VAR *v;
-
- if (value == 0)
- return ((char *)NULL);
-
- oname = this_command_name;
- this_command_name = varname;
-
- vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val);
- if (vtype == -1)
- {
- this_command_name = oname;
- return ((char *)NULL);
- }
-
- starsub = vtype & VT_STARSUB;
- vtype &= ~VT_STARSUB;
-
- r = verify_substring_values (v, val, substr, vtype, &e1, &e2);
- this_command_name = oname;
- if (r <= 0)
- return ((r == 0) ? &expand_param_error : (char *)NULL);
-
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1)
- tt = mb_substring (val, e1, e2);
- else
-#endif
- tt = substring (val, e1, e2);
-
- if (vtype == VT_VARIABLE)
- FREE (val);
- if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
- temp = quote_string (tt);
- else
- temp = tt ? quote_escapes (tt) : (char *)NULL;
- FREE (tt);
- break;
- case VT_POSPARMS:
- tt = pos_params (varname, e1, e2, quoted);
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0)
- {
- temp = tt ? quote_escapes (tt) : (char *)NULL;
- FREE (tt);
- }
- else
- temp = tt;
- break;
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- if (assoc_p (v))
- /* we convert to list and take first e2 elements starting at e1th
- element -- officially undefined for now */
- temp = assoc_subrange (assoc_cell (v), e1, e2, starsub, quoted);
- else
- /* We want E2 to be the number of elements desired (arrays can be sparse,
- so verify_substring_values just returns the numbers specified and we
- rely on array_subrange to understand how to deal with them). */
- temp = array_subrange (array_cell (v), e1, e2, starsub, quoted);
- /* array_subrange now calls array_quote_escapes as appropriate, so the
- caller no longer needs to. */
- break;
-#endif
- default:
- temp = (char *)NULL;
- }
-
- return temp;
-}
-
-/****************************************************************/
-/* */
-/* Functions to perform pattern substitution on variable values */
-/* */
-/****************************************************************/
-
-static int
-shouldexp_replacement (s)
- char *s;
-{
- register char *p;
-
- for (p = s; p && *p; p++)
- {
- if (*p == '\\')
- p++;
- else if (*p == '&')
- return 1;
- }
- return 0;
-}
-
-char *
-pat_subst (string, pat, rep, mflags)
- char *string, *pat, *rep;
- int mflags;
-{
- char *ret, *s, *e, *str, *rstr, *mstr;
- int rsize, rptr, l, replen, mtype, rxpand, rslen, mlen;
-
- if (string == 0)
- return (savestring (""));
-
- mtype = mflags & MATCH_TYPEMASK;
-
-#if 0 /* bash-4.2 ? */
- rxpand = (rep && *rep) ? shouldexp_replacement (rep) : 0;
-#else
- rxpand = 0;
-#endif
-
- /* Special cases:
- * 1. A null pattern with mtype == MATCH_BEG means to prefix STRING
- * with REP and return the result.
- * 2. A null pattern with mtype == MATCH_END means to append REP to
- * STRING and return the result.
- * These don't understand or process `&' in the replacement string.
- */
- if ((pat == 0 || *pat == 0) && (mtype == MATCH_BEG || mtype == MATCH_END))
- {
- replen = STRLEN (rep);
- l = STRLEN (string);
- ret = (char *)xmalloc (replen + l + 2);
- if (replen == 0)
- strcpy (ret, string);
- else if (mtype == MATCH_BEG)
- {
- strcpy (ret, rep);
- strcpy (ret + replen, string);
- }
- else
- {
- strcpy (ret, string);
- strcpy (ret + l, rep);
- }
- return (ret);
- }
-
- ret = (char *)xmalloc (rsize = 64);
- ret[0] = '\0';
-
- for (replen = STRLEN (rep), rptr = 0, str = string;;)
- {
- if (match_pattern (str, pat, mtype, &s, &e) == 0)
- break;
- l = s - str;
-
- if (rxpand)
- {
- int x;
- mlen = e - s;
- mstr = xmalloc (mlen + 1);
- for (x = 0; x < mlen; x++)
- mstr[x] = s[x];
- mstr[mlen] = '\0';
- rstr = strcreplace (rep, '&', mstr, 0);
- rslen = strlen (rstr);
- }
- else
- {
- rstr = rep;
- rslen = replen;
- }
-
- RESIZE_MALLOCED_BUFFER (ret, rptr, (l + rslen), rsize, 64);
-
- /* OK, now copy the leading unmatched portion of the string (from
- str to s) to ret starting at rptr (the current offset). Then copy
- the replacement string at ret + rptr + (s - str). Increment
- rptr (if necessary) and str and go on. */
- if (l)
- {
- strncpy (ret + rptr, str, l);
- rptr += l;
- }
- if (replen)
- {
- strncpy (ret + rptr, rstr, rslen);
- rptr += rslen;
- }
- str = e; /* e == end of match */
-
- if (rstr != rep)
- free (rstr);
-
- if (((mflags & MATCH_GLOBREP) == 0) || mtype != MATCH_ANY)
- break;
-
- if (s == e)
- {
- /* On a zero-length match, make sure we copy one character, since
- we increment one character to avoid infinite recursion. */
- RESIZE_MALLOCED_BUFFER (ret, rptr, 1, rsize, 64);
- ret[rptr++] = *str++;
- e++; /* avoid infinite recursion on zero-length match */
- }
- }
-
- /* Now copy the unmatched portion of the input string */
- if (str && *str)
- {
- RESIZE_MALLOCED_BUFFER (ret, rptr, STRLEN(str) + 1, rsize, 64);
- strcpy (ret + rptr, str);
- }
- else
- ret[rptr] = '\0';
-
- return ret;
-}
-
-/* Do pattern match and replacement on the positional parameters. */
-static char *
-pos_params_pat_subst (string, pat, rep, mflags)
- char *string, *pat, *rep;
- int mflags;
-{
- WORD_LIST *save, *params;
- WORD_DESC *w;
- char *ret;
- int pchar, qflags;
-
- save = params = list_rest_of_args ();
- if (save == 0)
- return ((char *)NULL);
-
- for ( ; params; params = params->next)
- {
- ret = pat_subst (params->word->word, pat, rep, mflags);
- w = alloc_word_desc ();
- w->word = ret ? ret : savestring ("");
- dispose_word (params->word);
- params->word = w;
- }
-
- pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@';
- qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0;
-
-#if 0
- if ((mflags & (MATCH_QUOTED|MATCH_STARSUB)) == (MATCH_QUOTED|MATCH_STARSUB))
- ret = string_list_dollar_star (quote_list (save));
- else if ((mflags & MATCH_STARSUB) == MATCH_STARSUB)
- ret = string_list_dollar_star (save);
- else if ((mflags & MATCH_QUOTED) == MATCH_QUOTED)
- ret = string_list_dollar_at (save, qflags);
- else
- ret = string_list_dollar_star (save);
-#else
- ret = string_list_pos_params (pchar, save, qflags);
-#endif
-
- dispose_words (save);
-
- return (ret);
-}
-
-/* Perform pattern substitution on VALUE, which is the expansion of
- VARNAME. PATSUB is an expression supplying the pattern to match
- and the string to substitute. QUOTED is a flags word containing
- the type of quoting currently in effect. */
-static char *
-parameter_brace_patsub (varname, value, ind, patsub, quoted, flags)
- char *varname, *value;
- int ind;
- char *patsub;
- int quoted, flags;
-{
- int vtype, mflags, starsub, delim;
- char *val, *temp, *pat, *rep, *p, *lpatsub, *tt;
- SHELL_VAR *v;
-
- if (value == 0)
- return ((char *)NULL);
-
- this_command_name = varname;
-
- vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val);
- if (vtype == -1)
- return ((char *)NULL);
-
- starsub = vtype & VT_STARSUB;
- vtype &= ~VT_STARSUB;
-
- mflags = 0;
- if (patsub && *patsub == '/')
- {
- mflags |= MATCH_GLOBREP;
- patsub++;
- }
-
- /* Malloc this because expand_string_if_necessary or one of the expansion
- functions in its call chain may free it on a substitution error. */
- lpatsub = savestring (patsub);
-
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- mflags |= MATCH_QUOTED;
-
- if (starsub)
- mflags |= MATCH_STARSUB;
-
- /* If the pattern starts with a `/', make sure we skip over it when looking
- for the replacement delimiter. */
-#if 0
- if (rep = quoted_strchr ((*patsub == '/') ? lpatsub+1 : lpatsub, '/', ST_BACKSL))
- *rep++ = '\0';
- else
- rep = (char *)NULL;
-#else
- delim = skip_to_delim (lpatsub, ((*patsub == '/') ? 1 : 0), "/", 0);
- if (lpatsub[delim] == '/')
- {
- lpatsub[delim] = 0;
- rep = lpatsub + delim + 1;
- }
- else
- rep = (char *)NULL;
-#endif
-
- if (rep && *rep == '\0')
- rep = (char *)NULL;
-
- /* Perform the same expansions on the pattern as performed by the
- pattern removal expansions. */
- pat = getpattern (lpatsub, quoted, 1);
-
- if (rep)
- {
- if ((mflags & MATCH_QUOTED) == 0)
- rep = expand_string_if_necessary (rep, quoted, expand_string_unsplit);
- else
- rep = expand_string_to_string_internal (rep, quoted, expand_string_unsplit);
- }
-
- /* ksh93 doesn't allow the match specifier to be a part of the expanded
- pattern. This is an extension. Make sure we don't anchor the pattern
- at the beginning or end of the string if we're doing global replacement,
- though. */
- p = pat;
- if (mflags & MATCH_GLOBREP)
- mflags |= MATCH_ANY;
- else if (pat && pat[0] == '#')
- {
- mflags |= MATCH_BEG;
- p++;
- }
- else if (pat && pat[0] == '%')
- {
- mflags |= MATCH_END;
- p++;
- }
- else
- mflags |= MATCH_ANY;
-
- /* OK, we now want to substitute REP for PAT in VAL. If
- flags & MATCH_GLOBREP is non-zero, the substitution is done
- everywhere, otherwise only the first occurrence of PAT is
- replaced. The pattern matching code doesn't understand
- CTLESC quoting CTLESC and CTLNUL so we use the dequoted variable
- values passed in (VT_VARIABLE) so the pattern substitution
- code works right. We need to requote special chars after
- we're done for VT_VARIABLE and VT_ARRAYMEMBER, and for the
- other cases if QUOTED == 0, since the posparams and arrays
- indexed by * or @ do special things when QUOTED != 0. */
-
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
- temp = pat_subst (val, p, rep, mflags);
- if (vtype == VT_VARIABLE)
- FREE (val);
- if (temp)
- {
- tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp);
- free (temp);
- temp = tt;
- }
- break;
- case VT_POSPARMS:
- temp = pos_params_pat_subst (val, p, rep, mflags);
- if (temp && (mflags & MATCH_QUOTED) == 0)
- {
- tt = quote_escapes (temp);
- free (temp);
- temp = tt;
- }
- break;
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- temp = assoc_p (v) ? assoc_patsub (assoc_cell (v), p, rep, mflags)
- : array_patsub (array_cell (v), p, rep, mflags);
- /* Don't call quote_escapes anymore; array_patsub calls
- array_quote_escapes as appropriate before adding the
- space separators; ditto for assoc_patsub. */
- break;
-#endif
- }
-
- FREE (pat);
- FREE (rep);
- free (lpatsub);
-
- return temp;
-}
-
-/****************************************************************/
-/* */
-/* Functions to perform case modification on variable values */
-/* */
-/****************************************************************/
-
-/* Do case modification on the positional parameters. */
-
-static char *
-pos_params_modcase (string, pat, modop, mflags)
- char *string, *pat;
- int modop;
- int mflags;
-{
- WORD_LIST *save, *params;
- WORD_DESC *w;
- char *ret;
- int pchar, qflags;
-
- save = params = list_rest_of_args ();
- if (save == 0)
- return ((char *)NULL);
-
- for ( ; params; params = params->next)
- {
- ret = sh_modcase (params->word->word, pat, modop);
- w = alloc_word_desc ();
- w->word = ret ? ret : savestring ("");
- dispose_word (params->word);
- params->word = w;
- }
-
- pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@';
- qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0;
-
- ret = string_list_pos_params (pchar, save, qflags);
- dispose_words (save);
-
- return (ret);
-}
-
-/* Perform case modification on VALUE, which is the expansion of
- VARNAME. MODSPEC is an expression supplying the type of modification
- to perform. QUOTED is a flags word containing the type of quoting
- currently in effect. */
-static char *
-parameter_brace_casemod (varname, value, ind, modspec, patspec, quoted, flags)
- char *varname, *value;
- int ind, modspec;
- char *patspec;
- int quoted, flags;
-{
- int vtype, starsub, modop, mflags, x;
- char *val, *temp, *pat, *p, *lpat, *tt;
- SHELL_VAR *v;
-
- if (value == 0)
- return ((char *)NULL);
-
- this_command_name = varname;
-
- vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val);
- if (vtype == -1)
- return ((char *)NULL);
-
- starsub = vtype & VT_STARSUB;
- vtype &= ~VT_STARSUB;
-
- modop = 0;
- mflags = 0;
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- mflags |= MATCH_QUOTED;
- if (starsub)
- mflags |= MATCH_STARSUB;
-
- p = patspec;
- if (modspec == '^')
- {
- x = p && p[0] == modspec;
- modop = x ? CASE_UPPER : CASE_UPFIRST;
- p += x;
- }
- else if (modspec == ',')
- {
- x = p && p[0] == modspec;
- modop = x ? CASE_LOWER : CASE_LOWFIRST;
- p += x;
- }
- else if (modspec == '~')
- {
- x = p && p[0] == modspec;
- modop = x ? CASE_TOGGLEALL : CASE_TOGGLE;
- p += x;
- }
-
- lpat = p ? savestring (p) : 0;
- /* Perform the same expansions on the pattern as performed by the
- pattern removal expansions. FOR LATER */
- pat = lpat ? getpattern (lpat, quoted, 1) : 0;
-
- /* OK, now we do the case modification. */
- switch (vtype)
- {
- case VT_VARIABLE:
- case VT_ARRAYMEMBER:
- temp = sh_modcase (val, pat, modop);
- if (vtype == VT_VARIABLE)
- FREE (val);
- if (temp)
- {
- tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp);
- free (temp);
- temp = tt;
- }
- break;
-
- case VT_POSPARMS:
- temp = pos_params_modcase (val, pat, modop, mflags);
- if (temp && (mflags & MATCH_QUOTED) == 0)
- {
- tt = quote_escapes (temp);
- free (temp);
- temp = tt;
- }
- break;
-
-#if defined (ARRAY_VARS)
- case VT_ARRAYVAR:
- temp = assoc_p (v) ? assoc_modcase (assoc_cell (v), pat, modop, mflags)
- : array_modcase (array_cell (v), pat, modop, mflags);
- /* Don't call quote_escapes; array_modcase calls array_quote_escapes
- as appropriate before adding the space separators; ditto for
- assoc_modcase. */
- break;
-#endif
- }
-
- FREE (pat);
- free (lpat);
-
- return temp;
-}
-
-/* Check for unbalanced parens in S, which is the contents of $(( ... )). If
- any occur, this must be a nested command substitution, so return 0.
- Otherwise, return 1. A valid arithmetic expression must always have a
- ( before a matching ), so any cases where there are more right parens
- means that this must not be an arithmetic expression, though the parser
- will not accept it without a balanced total number of parens. */
-static int
-chk_arithsub (s, len)
- const char *s;
- int len;
-{
- int i, count;
- DECLARE_MBSTATE;
-
- i = count = 0;
- while (i < len)
- {
- if (s[i] == LPAREN)
- count++;
- else if (s[i] == RPAREN)
- {
- count--;
- if (count < 0)
- return 0;
- }
-
- switch (s[i])
- {
- default:
- ADVANCE_CHAR (s, len, i);
- break;
-
- case '\\':
- i++;
- if (s[i])
- ADVANCE_CHAR (s, len, i);
- break;
-
- case '\'':
- i = skip_single_quoted (s, len, ++i);
- break;
-
- case '"':
- i = skip_double_quoted ((char *)s, len, ++i);
- break;
- }
- }
-
- return (count == 0);
-}
-
-/****************************************************************/
-/* */
-/* Functions to perform parameter expansion on a string */
-/* */
-/****************************************************************/
-
-/* ${[#][!]name[[:][^[^]][,[,]]#[#]%[%]-=?+[word][:e1[:e2]]]} */
-static WORD_DESC *
-parameter_brace_expand (string, indexp, quoted, pflags, quoted_dollar_atp, contains_dollar_at)
- char *string;
- int *indexp, quoted, *quoted_dollar_atp, *contains_dollar_at, pflags;
-{
- int check_nullness, var_is_set, var_is_null, var_is_special;
- int want_substring, want_indir, want_patsub, want_casemod;
- char *name, *value, *temp, *temp1;
- WORD_DESC *tdesc, *ret;
- int t_index, sindex, c, tflag, modspec;
- intmax_t number;
- arrayind_t ind;
-
- temp = temp1 = value = (char *)NULL;
- var_is_set = var_is_null = var_is_special = check_nullness = 0;
- want_substring = want_indir = want_patsub = want_casemod = 0;
-
- sindex = *indexp;
- t_index = ++sindex;
- /* ${#var} doesn't have any of the other parameter expansions on it. */
- if (string[t_index] == '#' && legal_variable_starter (string[t_index+1])) /* {{ */
- name = string_extract (string, &t_index, "}", SX_VARNAME);
- else
-#if defined (CASEMOD_EXPANSIONS)
- /* To enable case-toggling expansions using the `~' operator character
- change the 1 to 0. */
-# if defined (CASEMOD_CAPCASE)
- name = string_extract (string, &t_index, "#%^,~:-=?+/}", SX_VARNAME);
-# else
- name = string_extract (string, &t_index, "#%^,:-=?+/}", SX_VARNAME);
-# endif /* CASEMOD_CAPCASE */
-#else
- name = string_extract (string, &t_index, "#%:-=?+/}", SX_VARNAME);
-#endif /* CASEMOD_EXPANSIONS */
-
- ret = 0;
- tflag = 0;
-
- ind = INTMAX_MIN;
-
- /* If the name really consists of a special variable, then make sure
- that we have the entire name. We don't allow indirect references
- to special variables except `#', `?', `@' and `*'. */
- if ((sindex == t_index && VALID_SPECIAL_LENGTH_PARAM (string[t_index])) ||
- (sindex == t_index - 1 && string[sindex] == '!' && VALID_INDIR_PARAM (string[t_index])))
- {
- t_index++;
- free (name);
- temp1 = string_extract (string, &t_index, "#%:-=?+/}", 0);
- name = (char *)xmalloc (3 + (strlen (temp1)));
- *name = string[sindex];
- if (string[sindex] == '!')
- {
- /* indirect reference of $#, $?, $@, or $* */
- name[1] = string[sindex + 1];
- strcpy (name + 2, temp1);
- }
- else
- strcpy (name + 1, temp1);
- free (temp1);
- }
- sindex = t_index;
-
- /* Find out what character ended the variable name. Then
- do the appropriate thing. */
- if (c = string[sindex])
- sindex++;
-
- /* If c is followed by one of the valid parameter expansion
- characters, move past it as normal. If not, assume that
- a substring specification is being given, and do not move
- past it. */
- if (c == ':' && VALID_PARAM_EXPAND_CHAR (string[sindex]))
- {
- check_nullness++;
- if (c = string[sindex])
- sindex++;
- }
- else if (c == ':' && string[sindex] != RBRACE)
- want_substring = 1;
- else if (c == '/' && string[sindex] != RBRACE)
- want_patsub = 1;
-#if defined (CASEMOD_EXPANSIONS)
- else if (c == '^' || c == ',' || c == '~')
- {
- modspec = c;
- want_casemod = 1;
- }
-#endif
-
- /* Catch the valid and invalid brace expressions that made it through the
- tests above. */
- /* ${#-} is a valid expansion and means to take the length of $-.
- Similarly for ${#?} and ${##}... */
- if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 &&
- VALID_SPECIAL_LENGTH_PARAM (c) && string[sindex] == RBRACE)
- {
- name = (char *)xrealloc (name, 3);
- name[1] = c;
- name[2] = '\0';
- c = string[sindex++];
- }
-
- /* ...but ${#%}, ${#:}, ${#=}, ${#+}, and ${#/} are errors. */
- if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 &&
- member (c, "%:=+/") && string[sindex] == RBRACE)
- {
- temp = (char *)NULL;
- goto bad_substitution;
- }
-
- /* Indirect expansion begins with a `!'. A valid indirect expansion is
- either a variable name, one of the positional parameters or a special
- variable that expands to one of the positional parameters. */
- want_indir = *name == '!' &&
- (legal_variable_starter ((unsigned char)name[1]) || DIGIT (name[1])
- || VALID_INDIR_PARAM (name[1]));
-
- /* Determine the value of this variable. */
-
- /* Check for special variables, directly referenced. */
- if (SPECIAL_VAR (name, want_indir))
- var_is_special++;
-
- /* Check for special expansion things, like the length of a parameter */
- if (*name == '#' && name[1])
- {
- /* If we are not pointing at the character just after the
- closing brace, then we haven't gotten all of the name.
- Since it begins with a special character, this is a bad
- substitution. Also check NAME for validity before trying
- to go on. */
- if (string[sindex - 1] != RBRACE || (valid_length_expression (name) == 0))
- {
- temp = (char *)NULL;
- goto bad_substitution;
- }
-
- number = parameter_brace_expand_length (name);
- if (number == INTMAX_MIN && unbound_vars_is_error)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (name+1);
- free (name);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- free (name);
-
- *indexp = sindex;
- if (number < 0)
- return (&expand_wdesc_error);
- else
- {
- ret = alloc_word_desc ();
- ret->word = itos (number);
- return ret;
- }
- }
-
- /* ${@} is identical to $@. */
- if (name[0] == '@' && name[1] == '\0')
- {
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
-
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- }
-
- /* Process ${!PREFIX*} expansion. */
- if (want_indir && string[sindex - 1] == RBRACE &&
- (string[sindex - 2] == '*' || string[sindex - 2] == '@') &&
- legal_variable_starter ((unsigned char) name[1]))
- {
- char **x;
- WORD_LIST *xlist;
-
- temp1 = savestring (name + 1);
- number = strlen (temp1);
- temp1[number - 1] = '\0';
- x = all_variables_matching_prefix (temp1);
- xlist = strvec_to_word_list (x, 0, 0);
- if (string[sindex - 2] == '*')
- temp = string_list_dollar_star (xlist);
- else
- {
- temp = string_list_dollar_at (xlist, quoted);
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- }
- free (x);
- dispose_words (xlist);
- free (temp1);
- *indexp = sindex;
-
- ret = alloc_word_desc ();
- ret->word = temp;
- return ret;
- }
-
-#if defined (ARRAY_VARS)
- /* Process ${!ARRAY[@]} and ${!ARRAY[*]} expansion. */ /* [ */
- if (want_indir && string[sindex - 1] == RBRACE &&
- string[sindex - 2] == ']' && valid_array_reference (name+1))
- {
- char *x, *x1;
-
- temp1 = savestring (name + 1);
- x = array_variable_name (temp1, &x1, (int *)0); /* [ */
- FREE (x);
- if (ALL_ELEMENT_SUB (x1[0]) && x1[1] == ']')
- {
- temp = array_keys (temp1, quoted); /* handles assoc vars too */
- if (x1[0] == '@')
- {
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- }
-
- free (temp1);
- *indexp = sindex;
-
- ret = alloc_word_desc ();
- ret->word = temp;
- return ret;
- }
-
- free (temp1);
- }
-#endif /* ARRAY_VARS */
-
- /* Make sure that NAME is valid before trying to go on. */
- if (valid_brace_expansion_word (want_indir ? name + 1 : name,
- var_is_special) == 0)
- {
- temp = (char *)NULL;
- goto bad_substitution;
- }
-
- if (want_indir)
- tdesc = parameter_brace_expand_indir (name + 1, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at);
- else
- tdesc = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND|(pflags&PF_NOSPLIT2), &ind);
-
- if (tdesc)
- {
- temp = tdesc->word;
- tflag = tdesc->flags;
- dispose_word_desc (tdesc);
- }
- else
- temp = (char *)0;
-
-#if defined (ARRAY_VARS)
- if (valid_array_reference (name))
- chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at);
-#endif
-
- var_is_set = temp != (char *)0;
- var_is_null = check_nullness && (var_is_set == 0 || *temp == 0);
-
- /* Get the rest of the stuff inside the braces. */
- if (c && c != RBRACE)
- {
- /* Extract the contents of the ${ ... } expansion
- according to the Posix.2 rules. */
- value = extract_dollar_brace_string (string, &sindex, quoted, (c == '%' || c == '#' || c =='/' || c == '^' || c == ',' || c ==':') ? SX_POSIXEXP|SX_WORD : SX_WORD);
- if (string[sindex] == RBRACE)
- sindex++;
- else
- goto bad_substitution;
- }
- else
- value = (char *)NULL;
-
- *indexp = sindex;
-
- /* All the cases where an expansion can possibly generate an unbound
- variable error. */
- if (want_substring || want_patsub || want_casemod || c == '#' || c == '%' || c == RBRACE)
- {
- if (var_is_set == 0 && unbound_vars_is_error && ((name[0] != '@' && name[0] != '*') || name[1]))
- {
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (name);
- FREE (value);
- FREE (temp);
- free (name);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- }
-
- /* If this is a substring spec, process it and add the result. */
- if (want_substring)
- {
- temp1 = parameter_brace_substring (name, temp, ind, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0);
- FREE (name);
- FREE (value);
- FREE (temp);
-
- if (temp1 == &expand_param_error)
- return (&expand_wdesc_error);
- else if (temp1 == &expand_param_fatal)
- return (&expand_wdesc_fatal);
-
- ret = alloc_word_desc ();
- ret->word = temp1;
- if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ret->flags |= W_QUOTED|W_HASQUOTEDNULL;
- return ret;
- }
- else if (want_patsub)
- {
- temp1 = parameter_brace_patsub (name, temp, ind, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0);
- FREE (name);
- FREE (value);
- FREE (temp);
-
- if (temp1 == &expand_param_error)
- return (&expand_wdesc_error);
- else if (temp1 == &expand_param_fatal)
- return (&expand_wdesc_fatal);
-
- ret = alloc_word_desc ();
- ret->word = temp1;
- ret = alloc_word_desc ();
- ret->word = temp1;
- if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ret->flags |= W_QUOTED|W_HASQUOTEDNULL;
- return ret;
- }
-#if defined (CASEMOD_EXPANSIONS)
- else if (want_casemod)
- {
- temp1 = parameter_brace_casemod (name, temp, ind, modspec, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0);
- FREE (name);
- FREE (value);
- FREE (temp);
-
- if (temp1 == &expand_param_error)
- return (&expand_wdesc_error);
- else if (temp1 == &expand_param_fatal)
- return (&expand_wdesc_fatal);
-
- ret = alloc_word_desc ();
- ret->word = temp1;
- if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ret->flags |= W_QUOTED|W_HASQUOTEDNULL;
- return ret;
- }
-#endif
-
- /* Do the right thing based on which character ended the variable name. */
- switch (c)
- {
- default:
- case '\0':
- bad_substitution:
- report_error (_("%s: bad substitution"), string ? string : "??");
- FREE (value);
- FREE (temp);
- free (name);
- return &expand_wdesc_error;
-
- case RBRACE:
- break;
-
- case '#': /* ${param#[#]pattern} */
- case '%': /* ${param%[%]pattern} */
- if (value == 0 || *value == '\0' || temp == 0 || *temp == '\0')
- {
- FREE (value);
- break;
- }
- temp1 = parameter_brace_remove_pattern (name, temp, ind, value, c, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0);
- free (temp);
- free (value);
- free (name);
-
- ret = alloc_word_desc ();
- ret->word = temp1;
- if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ret->flags |= W_QUOTED|W_HASQUOTEDNULL;
- return ret;
-
- case '-':
- case '=':
- case '?':
- case '+':
- if (var_is_set && var_is_null == 0)
- {
- /* If the operator is `+', we don't want the value of the named
- variable for anything, just the value of the right hand side. */
- if (c == '+')
- {
- /* XXX -- if we're double-quoted and the named variable is "$@",
- we want to turn off any special handling of "$@" --
- we're not using it, so whatever is on the rhs applies. */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 0;
- if (contains_dollar_at)
- *contains_dollar_at = 0;
-
- FREE (temp);
- if (value)
- {
- /* From Posix discussion on austin-group list. Issue 221
- requires that backslashes escaping `}' inside
- double-quoted ${...} be removed. */
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- quoted |= Q_DOLBRACE;
- ret = parameter_brace_expand_rhs (name, value, c,
- quoted,
- quoted_dollar_atp,
- contains_dollar_at);
- /* XXX - fix up later, esp. noting presence of
- W_HASQUOTEDNULL in ret->flags */
- free (value);
- }
- else
- temp = (char *)NULL;
- }
- else
- {
- FREE (value);
- }
- /* Otherwise do nothing; just use the value in TEMP. */
- }
- else /* VAR not set or VAR is NULL. */
- {
- FREE (temp);
- temp = (char *)NULL;
- if (c == '=' && var_is_special)
- {
- report_error (_("$%s: cannot assign in this way"), name);
- free (name);
- free (value);
- return &expand_wdesc_error;
- }
- else if (c == '?')
- {
- parameter_brace_expand_error (name, value);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- else if (c != '+')
- {
- /* XXX -- if we're double-quoted and the named variable is "$@",
- we want to turn off any special handling of "$@" --
- we're not using it, so whatever is on the rhs applies. */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp)
- *quoted_dollar_atp = 0;
- if (contains_dollar_at)
- *contains_dollar_at = 0;
-
- /* From Posix discussion on austin-group list. Issue 221 requires
- that backslashes escaping `}' inside double-quoted ${...} be
- removed. */
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- quoted |= Q_DOLBRACE;
- ret = parameter_brace_expand_rhs (name, value, c, quoted,
- quoted_dollar_atp,
- contains_dollar_at);
- /* XXX - fix up later, esp. noting presence of
- W_HASQUOTEDNULL in tdesc->flags */
- }
- free (value);
- }
-
- break;
- }
- free (name);
-
- if (ret == 0)
- {
- ret = alloc_word_desc ();
- ret->flags = tflag;
- ret->word = temp;
- }
- return (ret);
-}
-
-/* Expand a single ${xxx} expansion. The braces are optional. When
- the braces are used, parameter_brace_expand() does the work,
- possibly calling param_expand recursively. */
-static WORD_DESC *
-param_expand (string, sindex, quoted, expanded_something,
- contains_dollar_at, quoted_dollar_at_p, had_quoted_null_p,
- pflags)
- char *string;
- int *sindex, quoted, *expanded_something, *contains_dollar_at;
- int *quoted_dollar_at_p, *had_quoted_null_p, pflags;
-{
- char *temp, *temp1, uerror[3];
- int zindex, t_index, expok;
- unsigned char c;
- intmax_t number;
- SHELL_VAR *var;
- WORD_LIST *list;
- WORD_DESC *tdesc, *ret;
- int tflag;
-
- zindex = *sindex;
- c = string[++zindex];
-
- temp = (char *)NULL;
- ret = tdesc = (WORD_DESC *)NULL;
- tflag = 0;
-
- /* Do simple cases first. Switch on what follows '$'. */
- switch (c)
- {
- /* $0 .. $9? */
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- temp1 = dollar_vars[TODIGIT (c)];
- if (unbound_vars_is_error && temp1 == (char *)NULL)
- {
- uerror[0] = '$';
- uerror[1] = c;
- uerror[2] = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (uerror);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- if (temp1)
- temp = (*temp1 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ? quote_string (temp1)
- : quote_escapes (temp1);
- else
- temp = (char *)NULL;
-
- break;
-
- /* $$ -- pid of the invoking shell. */
- case '$':
- temp = itos (dollar_dollar_pid);
- break;
-
- /* $# -- number of positional parameters. */
- case '#':
- temp = itos (number_of_args ());
- break;
-
- /* $? -- return value of the last synchronous command. */
- case '?':
- temp = itos (last_command_exit_value);
- break;
-
- /* $- -- flags supplied to the shell on invocation or by `set'. */
- case '-':
- temp = which_set_flags ();
- break;
-
- /* $! -- Pid of the last asynchronous command. */
- case '!':
- /* If no asynchronous pids have been created, expand to nothing.
- If `set -u' has been executed, and no async processes have
- been created, this is an expansion error. */
- if (last_asynchronous_pid == NO_PID)
- {
- if (expanded_something)
- *expanded_something = 0;
- temp = (char *)NULL;
- if (unbound_vars_is_error)
- {
- uerror[0] = '$';
- uerror[1] = c;
- uerror[2] = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (uerror);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
- }
- else
- temp = itos (last_asynchronous_pid);
- break;
-
- /* The only difference between this and $@ is when the arg is quoted. */
- case '*': /* `$*' */
- list = list_rest_of_args ();
-
-#if 0
- /* According to austin-group posix proposal by Geoff Clare in
- <20090505091501.GA10097@squonk.masqnet> of 5 May 2009:
-
- "The shell shall write a message to standard error and
- immediately exit when it tries to expand an unset parameter
- other than the '@' and '*' special parameters."
- */
-
- if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0)
- {
- uerror[0] = '$';
- uerror[1] = '*';
- uerror[2] = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (uerror);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
-#endif
-
- /* If there are no command-line arguments, this should just
- disappear if there are other characters in the expansion,
- even if it's quoted. */
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && list == 0)
- temp = (char *)NULL;
- else if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE))
- {
- /* If we have "$*" we want to make a string of the positional
- parameters, separated by the first character of $IFS, and
- quote the whole string, including the separators. If IFS
- is unset, the parameters are separated by ' '; if $IFS is
- null, the parameters are concatenated. */
- temp = (quoted & (Q_DOUBLE_QUOTES|Q_PATQUOTE)) ? string_list_dollar_star (list) : string_list (list);
- if (temp)
- {
- temp1 = quote_string (temp);
- if (*temp == 0)
- tflag |= W_HASQUOTEDNULL;
- free (temp);
- temp = temp1;
- }
- }
- else
- {
- /* We check whether or not we're eventually going to split $* here,
- for example when IFS is empty and we are processing the rhs of
- an assignment statement. In that case, we don't separate the
- arguments at all. Otherwise, if the $* is not quoted it is
- identical to $@ */
-#if 1
-# if defined (HANDLE_MULTIBYTE)
- if (expand_no_split_dollar_star && ifs_firstc[0] == 0)
-# else
- if (expand_no_split_dollar_star && ifs_firstc == 0)
-# endif
- temp = string_list_dollar_star (list);
- else
- temp = string_list_dollar_at (list, quoted);
-#else
- temp = string_list_dollar_at (list, quoted);
-#endif
- if (expand_no_split_dollar_star == 0 && contains_dollar_at)
- *contains_dollar_at = 1;
- }
-
- dispose_words (list);
- break;
-
- /* When we have "$@" what we want is "$1" "$2" "$3" ... This
- means that we have to turn quoting off after we split into
- the individually quoted arguments so that the final split
- on the first character of $IFS is still done. */
- case '@': /* `$@' */
- list = list_rest_of_args ();
-
-#if 0
- /* According to austin-group posix proposal by Geoff Clare in
- <20090505091501.GA10097@squonk.masqnet> of 5 May 2009:
-
- "The shell shall write a message to standard error and
- immediately exit when it tries to expand an unset parameter
- other than the '@' and '*' special parameters."
- */
-
- if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0)
- {
- uerror[0] = '$';
- uerror[1] = '@';
- uerror[2] = '\0';
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (uerror);
- return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
- }
-#endif
-
- /* We want to flag the fact that we saw this. We can't turn
- off quoting entirely, because other characters in the
- string might need it (consider "\"$@\""), but we need some
- way to signal that the final split on the first character
- of $IFS should be done, even though QUOTED is 1. */
- /* XXX - should this test include Q_PATQUOTE? */
- if (quoted_dollar_at_p && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- *quoted_dollar_at_p = 1;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
-
- /* We want to separate the positional parameters with the first
- character of $IFS in case $IFS is something other than a space.
- We also want to make sure that splitting is done no matter what --
- according to POSIX.2, this expands to a list of the positional
- parameters no matter what IFS is set to. */
-#if 0
- temp = string_list_dollar_at (list, quoted);
-#else
- temp = string_list_dollar_at (list, (pflags & PF_ASSIGNRHS) ? (quoted|Q_DOUBLE_QUOTES) : quoted);
-#endif
-
- dispose_words (list);
- break;
-
- case LBRACE:
- tdesc = parameter_brace_expand (string, &zindex, quoted, pflags,
- quoted_dollar_at_p,
- contains_dollar_at);
-
- if (tdesc == &expand_wdesc_error || tdesc == &expand_wdesc_fatal)
- return (tdesc);
- temp = tdesc ? tdesc->word : (char *)0;
-
- /* XXX */
- /* Quoted nulls should be removed if there is anything else
- in the string. */
- /* Note that we saw the quoted null so we can add one back at
- the end of this function if there are no other characters
- in the string, discard TEMP, and go on. The exception to
- this is when we have "${@}" and $1 is '', since $@ needs
- special handling. */
- if (tdesc && tdesc->word && (tdesc->flags & W_HASQUOTEDNULL) && QUOTED_NULL (temp))
- {
- if (had_quoted_null_p)
- *had_quoted_null_p = 1;
- if (*quoted_dollar_at_p == 0)
- {
- free (temp);
- tdesc->word = temp = (char *)NULL;
- }
-
- }
-
- ret = tdesc;
- goto return0;
-
- /* Do command or arithmetic substitution. */
- case LPAREN:
- /* We have to extract the contents of this paren substitution. */
- t_index = zindex + 1;
- temp = extract_command_subst (string, &t_index, 0);
- zindex = t_index;
-
- /* For Posix.2-style `$(( ))' arithmetic substitution,
- extract the expression and pass it to the evaluator. */
- if (temp && *temp == LPAREN)
- {
- char *temp2;
- temp1 = temp + 1;
- temp2 = savestring (temp1);
- t_index = strlen (temp2) - 1;
-
- if (temp2[t_index] != RPAREN)
- {
- free (temp2);
- goto comsub;
- }
-
- /* Cut off ending `)' */
- temp2[t_index] = '\0';
-
- if (chk_arithsub (temp2, t_index) == 0)
- {
- free (temp2);
-#if 0
- internal_warning (_("future versions of the shell will force evaluation as an arithmetic substitution"));
-#endif
- goto comsub;
- }
-
- /* Expand variables found inside the expression. */
- temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES);
- free (temp2);
-
-arithsub:
- /* No error messages. */
- this_command_name = (char *)NULL;
- number = evalexp (temp1, &expok);
- free (temp);
- free (temp1);
- if (expok == 0)
- {
- if (interactive_shell == 0 && posixly_correct)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- return (&expand_wdesc_fatal);
- }
- else
- return (&expand_wdesc_error);
- }
- temp = itos (number);
- break;
- }
-
-comsub:
- if (pflags & PF_NOCOMSUB)
- /* we need zindex+1 because string[zindex] == RPAREN */
- temp1 = substring (string, *sindex, zindex+1);
- else
- {
- tdesc = command_substitute (temp, quoted);
- temp1 = tdesc ? tdesc->word : (char *)NULL;
- if (tdesc)
- dispose_word_desc (tdesc);
- }
- FREE (temp);
- temp = temp1;
- break;
-
- /* Do POSIX.2d9-style arithmetic substitution. This will probably go
- away in a future bash release. */
- case '[':
- /* Extract the contents of this arithmetic substitution. */
- t_index = zindex + 1;
- temp = extract_arithmetic_subst (string, &t_index);
- zindex = t_index;
- if (temp == 0)
- {
- temp = savestring (string);
- if (expanded_something)
- *expanded_something = 0;
- goto return0;
- }
-
- /* Do initial variable expansion. */
- temp1 = expand_arith_string (temp, Q_DOUBLE_QUOTES);
-
- goto arithsub;
-
- default:
- /* Find the variable in VARIABLE_LIST. */
- temp = (char *)NULL;
-
- for (t_index = zindex; (c = string[zindex]) && legal_variable_char (c); zindex++)
- ;
- temp1 = (zindex > t_index) ? substring (string, t_index, zindex) : (char *)NULL;
-
- /* If this isn't a variable name, then just output the `$'. */
- if (temp1 == 0 || *temp1 == '\0')
- {
- FREE (temp1);
- temp = (char *)xmalloc (2);
- temp[0] = '$';
- temp[1] = '\0';
- if (expanded_something)
- *expanded_something = 0;
- goto return0;
- }
-
- /* If the variable exists, return its value cell. */
- var = find_variable (temp1);
-
- if (var && invisible_p (var) == 0 && var_isset (var))
- {
-#if defined (ARRAY_VARS)
- if (assoc_p (var) || array_p (var))
- {
- temp = array_p (var) ? array_reference (array_cell (var), 0)
- : assoc_reference (assoc_cell (var), "0");
- if (temp)
- temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ? quote_string (temp)
- : quote_escapes (temp);
- else if (unbound_vars_is_error)
- goto unbound_variable;
- }
- else
-#endif
- {
- temp = value_cell (var);
-
- temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
- ? quote_string (temp)
- : quote_escapes (temp);
- }
-
- free (temp1);
-
- goto return0;
- }
-
- temp = (char *)NULL;
-
-unbound_variable:
- if (unbound_vars_is_error)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- err_unboundvar (temp1);
- }
- else
- {
- free (temp1);
- goto return0;
- }
-
- free (temp1);
- last_command_exit_value = EXECUTION_FAILURE;
- return ((unbound_vars_is_error && interactive_shell == 0)
- ? &expand_wdesc_fatal
- : &expand_wdesc_error);
- }
-
- if (string[zindex])
- zindex++;
-
-return0:
- *sindex = zindex;
-
- if (ret == 0)
- {
- ret = alloc_word_desc ();
- ret->flags = tflag; /* XXX */
- ret->word = temp;
- }
- return ret;
-}
-
-/* Make a word list which is the result of parameter and variable
- expansion, command substitution, arithmetic substitution, and
- quote removal of WORD. Return a pointer to a WORD_LIST which is
- the result of the expansion. If WORD contains a null word, the
- word list returned is also null.
-
- QUOTED contains flag values defined in shell.h.
-
- ISEXP is used to tell expand_word_internal that the word should be
- treated as the result of an expansion. This has implications for
- how IFS characters in the word are treated.
-
- CONTAINS_DOLLAR_AT and EXPANDED_SOMETHING are return values; when non-null
- they point to an integer value which receives information about expansion.
- CONTAINS_DOLLAR_AT gets non-zero if WORD contained "$@", else zero.
- EXPANDED_SOMETHING get non-zero if WORD contained any parameter expansions,
- else zero.
-
- This only does word splitting in the case of $@ expansion. In that
- case, we split on ' '. */
-
-/* Values for the local variable quoted_state. */
-#define UNQUOTED 0
-#define PARTIALLY_QUOTED 1
-#define WHOLLY_QUOTED 2
-
-static WORD_LIST *
-expand_word_internal (word, quoted, isexp, contains_dollar_at, expanded_something)
- WORD_DESC *word;
- int quoted, isexp;
- int *contains_dollar_at;
- int *expanded_something;
-{
- WORD_LIST *list;
- WORD_DESC *tword;
-
- /* The intermediate string that we build while expanding. */
- char *istring;
-
- /* The current size of the above object. */
- int istring_size;
-
- /* Index into ISTRING. */
- int istring_index;
-
- /* Temporary string storage. */
- char *temp, *temp1;
-
- /* The text of WORD. */
- register char *string;
-
- /* The size of STRING. */
- size_t string_size;
-
- /* The index into STRING. */
- int sindex;
-
- /* This gets 1 if we see a $@ while quoted. */
- int quoted_dollar_at;
-
- /* One of UNQUOTED, PARTIALLY_QUOTED, or WHOLLY_QUOTED, depending on
- whether WORD contains no quoting characters, a partially quoted
- string (e.g., "xx"ab), or is fully quoted (e.g., "xxab"). */
- int quoted_state;
-
- /* State flags */
- int had_quoted_null;
- int has_dollar_at;
- int tflag;
- int pflags; /* flags passed to param_expand */
-
- int assignoff; /* If assignment, offset of `=' */
-
- register unsigned char c; /* Current character. */
- int t_index; /* For calls to string_extract_xxx. */
-
- char twochars[2];
-
- DECLARE_MBSTATE;
-
- istring = (char *)xmalloc (istring_size = DEFAULT_INITIAL_ARRAY_SIZE);
- istring[istring_index = 0] = '\0';
- quoted_dollar_at = had_quoted_null = has_dollar_at = 0;
- quoted_state = UNQUOTED;
-
- string = word->word;
- if (string == 0)
- goto finished_with_string;
- /* Don't need the string length for the SADD... and COPY_ macros unless
- multibyte characters are possible. */
- string_size = (MB_CUR_MAX > 1) ? strlen (string) : 1;
-
- if (contains_dollar_at)
- *contains_dollar_at = 0;
-
- assignoff = -1;
-
- /* Begin the expansion. */
-
- for (sindex = 0; ;)
- {
- c = string[sindex];
-
- /* Case on toplevel character. */
- switch (c)
- {
- case '\0':
- goto finished_with_string;
-
- case CTLESC:
- sindex++;
-#if HANDLE_MULTIBYTE
- if (MB_CUR_MAX > 1 && string[sindex])
- {
- SADD_MBQCHAR_BODY(temp, string, sindex, string_size);
- }
- else
-#endif
- {
- temp = (char *)xmalloc (3);
- temp[0] = CTLESC;
- temp[1] = c = string[sindex];
- temp[2] = '\0';
- }
-
-dollar_add_string:
- if (string[sindex])
- sindex++;
-
-add_string:
- if (temp)
- {
- istring = sub_append_string (temp, istring, &istring_index, &istring_size);
- temp = (char *)0;
- }
-
- break;
-
-#if defined (PROCESS_SUBSTITUTION)
- /* Process substitution. */
- case '<':
- case '>':
- {
- if (string[++sindex] != LPAREN || (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (word->flags & (W_DQUOTE|W_NOPROCSUB)) || posixly_correct)
- {
- sindex--; /* add_character: label increments sindex */
- goto add_character;
- }
- else
- t_index = sindex + 1; /* skip past both '<' and LPAREN */
-
- temp1 = extract_process_subst (string, (c == '<') ? "<(" : ">(", &t_index); /*))*/
- sindex = t_index;
-
- /* If the process substitution specification is `<()', we want to
- open the pipe for writing in the child and produce output; if
- it is `>()', we want to open the pipe for reading in the child
- and consume input. */
- temp = temp1 ? process_substitute (temp1, (c == '>')) : (char *)0;
-
- FREE (temp1);
-
- goto dollar_add_string;
- }
-#endif /* PROCESS_SUBSTITUTION */
-
- case '=':
- /* Posix.2 section 3.6.1 says that tildes following `=' in words
- which are not assignment statements are not expanded. If the
- shell isn't in posix mode, though, we perform tilde expansion
- on `likely candidate' unquoted assignment statements (flags
- include W_ASSIGNMENT but not W_QUOTED). A likely candidate
- contains an unquoted :~ or =~. Something to think about: we
- now have a flag that says to perform tilde expansion on arguments
- to `assignment builtins' like declare and export that look like
- assignment statements. We now do tilde expansion on such words
- even in POSIX mode. */
- if (word->flags & (W_ASSIGNRHS|W_NOTILDE))
- {
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c))
- goto add_ifs_character;
- else
- goto add_character;
- }
- /* If we're not in posix mode or forcing assignment-statement tilde
- expansion, note where the `=' appears in the word and prepare to
- do tilde expansion following the first `='. */
- if ((word->flags & W_ASSIGNMENT) &&
- (posixly_correct == 0 || (word->flags & W_TILDEEXP)) &&
- assignoff == -1 && sindex > 0)
- assignoff = sindex;
- if (sindex == assignoff && string[sindex+1] == '~') /* XXX */
- word->flags |= W_ITILDE;
-#if 0
- else if ((word->flags & W_ASSIGNMENT) &&
- (posixly_correct == 0 || (word->flags & W_TILDEEXP)) &&
- string[sindex+1] == '~')
- word->flags |= W_ITILDE;
-#endif
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c))
- goto add_ifs_character;
- else
- goto add_character;
-
- case ':':
- if (word->flags & W_NOTILDE)
- {
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c))
- goto add_ifs_character;
- else
- goto add_character;
- }
-
- if ((word->flags & (W_ASSIGNMENT|W_ASSIGNRHS|W_TILDEEXP)) &&
- string[sindex+1] == '~')
- word->flags |= W_ITILDE;
-
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c))
- goto add_ifs_character;
- else
- goto add_character;
-
- case '~':
- /* If the word isn't supposed to be tilde expanded, or we're not
- at the start of a word or after an unquoted : or = in an
- assignment statement, we don't do tilde expansion. */
- if ((word->flags & (W_NOTILDE|W_DQUOTE)) ||
- (sindex > 0 && ((word->flags & W_ITILDE) == 0)) ||
- (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
- {
- word->flags &= ~W_ITILDE;
- if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0)
- goto add_ifs_character;
- else
- goto add_character;
- }
-
- if (word->flags & W_ASSIGNRHS)
- tflag = 2;
- else if (word->flags & (W_ASSIGNMENT|W_TILDEEXP))
- tflag = 1;
- else
- tflag = 0;
-
- temp = bash_tilde_find_word (string + sindex, tflag, &t_index);
-
- word->flags &= ~W_ITILDE;
-
- if (temp && *temp && t_index > 0)
- {
- temp1 = bash_tilde_expand (temp, tflag);
- if (temp1 && *temp1 == '~' && STREQ (temp, temp1))
- {
- FREE (temp);
- FREE (temp1);
- goto add_character; /* tilde expansion failed */
- }
- free (temp);
- temp = temp1;
- sindex += t_index;
- goto add_quoted_string; /* XXX was add_string */
- }
- else
- {
- FREE (temp);
- goto add_character;
- }
-
- case '$':
- if (expanded_something)
- *expanded_something = 1;
-
- has_dollar_at = 0;
- pflags = (word->flags & W_NOCOMSUB) ? PF_NOCOMSUB : 0;
- if (word->flags & W_NOSPLIT2)
- pflags |= PF_NOSPLIT2;
- if (word->flags & W_ASSIGNRHS)
- pflags |= PF_ASSIGNRHS;
- tword = param_expand (string, &sindex, quoted, expanded_something,
- &has_dollar_at, "ed_dollar_at,
- &had_quoted_null, pflags);
-
- if (tword == &expand_wdesc_error || tword == &expand_wdesc_fatal)
- {
- free (string);
- free (istring);
- return ((tword == &expand_wdesc_error) ? &expand_word_error
- : &expand_word_fatal);
- }
- if (contains_dollar_at && has_dollar_at)
- *contains_dollar_at = 1;
-
- if (tword && (tword->flags & W_HASQUOTEDNULL))
- had_quoted_null = 1;
-
- temp = tword->word;
- dispose_word_desc (tword);
-
- goto add_string;
- break;
-
- case '`': /* Backquoted command substitution. */
- {
- t_index = sindex++;
-
- temp = string_extract (string, &sindex, "`", SX_REQMATCH);
- /* The test of sindex against t_index is to allow bare instances of
- ` to pass through, for backwards compatibility. */
- if (temp == &extract_string_error || temp == &extract_string_fatal)
- {
- if (sindex - 1 == t_index)
- {
- sindex = t_index;
- goto add_character;
- }
- report_error (_("bad substitution: no closing \"`\" in %s") , string+t_index);
- free (string);
- free (istring);
- return ((temp == &extract_string_error) ? &expand_word_error
- : &expand_word_fatal);
- }
-
- if (expanded_something)
- *expanded_something = 1;
-
- if (word->flags & W_NOCOMSUB)
- /* sindex + 1 because string[sindex] == '`' */
- temp1 = substring (string, t_index, sindex + 1);
- else
- {
- de_backslash (temp);
- tword = command_substitute (temp, quoted);
- temp1 = tword ? tword->word : (char *)NULL;
- if (tword)
- dispose_word_desc (tword);
- }
- FREE (temp);
- temp = temp1;
- goto dollar_add_string;
- }
-
- case '\\':
- if (string[sindex + 1] == '\n')
- {
- sindex += 2;
- continue;
- }
-
- c = string[++sindex];
-
- if (quoted & Q_HERE_DOCUMENT)
- tflag = CBSHDOC;
- else if (quoted & Q_DOUBLE_QUOTES)
- tflag = CBSDQUOTE;
- else
- tflag = 0;
-
- /* From Posix discussion on austin-group list: Backslash escaping
- a } in ${...} is removed. Issue 0000221 */
- if ((quoted & Q_DOLBRACE) && c == RBRACE)
- {
- SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size);
- }
- else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && ((sh_syntaxtab[c] & tflag) == 0))
- {
- SCOPY_CHAR_I (twochars, '\\', c, string, sindex, string_size);
- }
- else if (c == 0)
- {
- c = CTLNUL;
- sindex--; /* add_character: label increments sindex */
- goto add_character;
- }
- else
- {
- SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size);
- }
-
- sindex++;
-add_twochars:
- /* BEFORE jumping here, we need to increment sindex if appropriate */
- RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size,
- DEFAULT_ARRAY_SIZE);
- istring[istring_index++] = twochars[0];
- istring[istring_index++] = twochars[1];
- istring[istring_index] = '\0';
-
- break;
-
- case '"':
-#if 0
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (word->flags & W_DQUOTE))
-#else
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
-#endif
- goto add_character;
-
- t_index = ++sindex;
- temp = string_extract_double_quoted (string, &sindex, 0);
-
- /* If the quotes surrounded the entire string, then the
- whole word was quoted. */
- quoted_state = (t_index == 1 && string[sindex] == '\0')
- ? WHOLLY_QUOTED
- : PARTIALLY_QUOTED;
-
- if (temp && *temp)
- {
- tword = alloc_word_desc ();
- tword->word = temp;
-
- temp = (char *)NULL;
-
- has_dollar_at = 0;
- /* Need to get W_HASQUOTEDNULL flag through this function. */
- list = expand_word_internal (tword, Q_DOUBLE_QUOTES, 0, &has_dollar_at, (int *)NULL);
-
- if (list == &expand_word_error || list == &expand_word_fatal)
- {
- free (istring);
- free (string);
- /* expand_word_internal has already freed temp_word->word
- for us because of the way it prints error messages. */
- tword->word = (char *)NULL;
- dispose_word (tword);
- return list;
- }
-
- dispose_word (tword);
-
- /* "$@" (a double-quoted dollar-at) expands into nothing,
- not even a NULL word, when there are no positional
- parameters. */
- if (list == 0 && has_dollar_at)
- {
- quoted_dollar_at++;
- break;
- }
-
- /* If we get "$@", we know we have expanded something, so we
- need to remember it for the final split on $IFS. This is
- a special case; it's the only case where a quoted string
- can expand into more than one word. It's going to come back
- from the above call to expand_word_internal as a list with
- a single word, in which all characters are quoted and
- separated by blanks. What we want to do is to turn it back
- into a list for the next piece of code. */
- if (list)
- dequote_list (list);
-
- if (list && list->word && (list->word->flags & W_HASQUOTEDNULL))
- had_quoted_null = 1;
-
- if (has_dollar_at)
- {
- quoted_dollar_at++;
- if (contains_dollar_at)
- *contains_dollar_at = 1;
- if (expanded_something)
- *expanded_something = 1;
- }
- }
- else
- {
- /* What we have is "". This is a minor optimization. */
- FREE (temp);
- list = (WORD_LIST *)NULL;
- }
-
- /* The code above *might* return a list (consider the case of "$@",
- where it returns "$1", "$2", etc.). We can't throw away the
- rest of the list, and we have to make sure each word gets added
- as quoted. We test on tresult->next: if it is non-NULL, we
- quote the whole list, save it to a string with string_list, and
- add that string. We don't need to quote the results of this
- (and it would be wrong, since that would quote the separators
- as well), so we go directly to add_string. */
- if (list)
- {
- if (list->next)
- {
-#if 0
- if (quoted_dollar_at && (word->flags & W_NOSPLIT2))
- temp = string_list_internal (quote_list (list), " ");
- else
-#endif
- /* Testing quoted_dollar_at makes sure that "$@" is
- split correctly when $IFS does not contain a space. */
- temp = quoted_dollar_at
- ? string_list_dollar_at (list, Q_DOUBLE_QUOTES)
- : string_list (quote_list (list));
- dispose_words (list);
- goto add_string;
- }
- else
- {
- temp = savestring (list->word->word);
- tflag = list->word->flags;
- dispose_words (list);
-
- /* If the string is not a quoted null string, we want
- to remove any embedded unquoted CTLNUL characters.
- We do not want to turn quoted null strings back into
- the empty string, though. We do this because we
- want to remove any quoted nulls from expansions that
- contain other characters. For example, if we have
- x"$*"y or "x$*y" and there are no positional parameters,
- the $* should expand into nothing. */
- /* We use the W_HASQUOTEDNULL flag to differentiate the
- cases: a quoted null character as above and when
- CTLNUL is contained in the (non-null) expansion
- of some variable. We use the had_quoted_null flag to
- pass the value through this function to its caller. */
- if ((tflag & W_HASQUOTEDNULL) && QUOTED_NULL (temp) == 0)
- remove_quoted_nulls (temp); /* XXX */
- }
- }
- else
- temp = (char *)NULL;
-
- /* We do not want to add quoted nulls to strings that are only
- partially quoted; we can throw them away. The execption to
- this is when we are going to be performing word splitting,
- since we have to preserve a null argument if the next character
- will cause word splitting. */
- if (temp == 0 && quoted_state == PARTIALLY_QUOTED && (word->flags & (W_NOSPLIT|W_NOSPLIT2)))
- continue;
-
- add_quoted_string:
-
- if (temp)
- {
- temp1 = temp;
- temp = quote_string (temp);
- free (temp1);
- goto add_string;
- }
- else
- {
- /* Add NULL arg. */
- c = CTLNUL;
- sindex--; /* add_character: label increments sindex */
- goto add_character;
- }
-
- /* break; */
-
- case '\'':
-#if 0
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (word->flags & W_DQUOTE))
-#else
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
-#endif
- goto add_character;
-
- t_index = ++sindex;
- temp = string_extract_single_quoted (string, &sindex);
-
- /* If the entire STRING was surrounded by single quotes,
- then the string is wholly quoted. */
- quoted_state = (t_index == 1 && string[sindex] == '\0')
- ? WHOLLY_QUOTED
- : PARTIALLY_QUOTED;
-
- /* If all we had was '', it is a null expansion. */
- if (*temp == '\0')
- {
- free (temp);
- temp = (char *)NULL;
- }
- else
- remove_quoted_escapes (temp); /* ??? */
-
- /* We do not want to add quoted nulls to strings that are only
- partially quoted; such nulls are discarded. */
- if (temp == 0 && (quoted_state == PARTIALLY_QUOTED))
- continue;
-
- /* If we have a quoted null expansion, add a quoted NULL to istring. */
- if (temp == 0)
- {
- c = CTLNUL;
- sindex--; /* add_character: label increments sindex */
- goto add_character;
- }
- else
- goto add_quoted_string;
-
- /* break; */
-
- default:
- /* This is the fix for " $@ " */
- add_ifs_character:
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (isexp == 0 && isifs (c)))
- {
- if (string[sindex]) /* from old goto dollar_add_string */
- sindex++;
- if (c == 0)
- {
- c = CTLNUL;
- goto add_character;
- }
- else
- {
-#if HANDLE_MULTIBYTE
- if (MB_CUR_MAX > 1)
- sindex--;
-
- if (MB_CUR_MAX > 1)
- {
- SADD_MBQCHAR_BODY(temp, string, sindex, string_size);
- }
- else
-#endif
- {
- twochars[0] = CTLESC;
- twochars[1] = c;
- goto add_twochars;
- }
- }
- }
-
- SADD_MBCHAR (temp, string, sindex, string_size);
-
- add_character:
- RESIZE_MALLOCED_BUFFER (istring, istring_index, 1, istring_size,
- DEFAULT_ARRAY_SIZE);
- istring[istring_index++] = c;
- istring[istring_index] = '\0';
-
- /* Next character. */
- sindex++;
- }
- }
-
-finished_with_string:
- /* OK, we're ready to return. If we have a quoted string, and
- quoted_dollar_at is not set, we do no splitting at all; otherwise
- we split on ' '. The routines that call this will handle what to
- do if nothing has been expanded. */
-
- /* Partially and wholly quoted strings which expand to the empty
- string are retained as an empty arguments. Unquoted strings
- which expand to the empty string are discarded. The single
- exception is the case of expanding "$@" when there are no
- positional parameters. In that case, we discard the expansion. */
-
- /* Because of how the code that handles "" and '' in partially
- quoted strings works, we need to make ISTRING into a QUOTED_NULL
- if we saw quoting characters, but the expansion was empty.
- "" and '' are tossed away before we get to this point when
- processing partially quoted strings. This makes "" and $xxx""
- equivalent when xxx is unset. We also look to see whether we
- saw a quoted null from a ${} expansion and add one back if we
- need to. */
-
- /* If we expand to nothing and there were no single or double quotes
- in the word, we throw it away. Otherwise, we return a NULL word.
- The single exception is for $@ surrounded by double quotes when
- there are no positional parameters. In that case, we also throw
- the word away. */
-
- if (*istring == '\0')
- {
- if (quoted_dollar_at == 0 && (had_quoted_null || quoted_state == PARTIALLY_QUOTED))
- {
- istring[0] = CTLNUL;
- istring[1] = '\0';
- tword = make_bare_word (istring);
- tword->flags |= W_HASQUOTEDNULL; /* XXX */
- list = make_word_list (tword, (WORD_LIST *)NULL);
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- tword->flags |= W_QUOTED;
- }
- /* According to sh, ksh, and Posix.2, if a word expands into nothing
- and a double-quoted "$@" appears anywhere in it, then the entire
- word is removed. */
- else if (quoted_state == UNQUOTED || quoted_dollar_at)
- list = (WORD_LIST *)NULL;
-#if 0
- else
- {
- tword = make_bare_word (istring);
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- tword->flags |= W_QUOTED;
- list = make_word_list (tword, (WORD_LIST *)NULL);
- }
-#else
- else
- list = (WORD_LIST *)NULL;
-#endif
- }
- else if (word->flags & W_NOSPLIT)
- {
- tword = make_bare_word (istring);
- if (word->flags & W_ASSIGNMENT)
- tword->flags |= W_ASSIGNMENT; /* XXX */
- if (word->flags & W_COMPASSIGN)
- tword->flags |= W_COMPASSIGN; /* XXX */
- if (word->flags & W_NOGLOB)
- tword->flags |= W_NOGLOB; /* XXX */
- if (word->flags & W_NOEXPAND)
- tword->flags |= W_NOEXPAND; /* XXX */
- if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
- tword->flags |= W_QUOTED;
- if (had_quoted_null)
- tword->flags |= W_HASQUOTEDNULL;
- list = make_word_list (tword, (WORD_LIST *)NULL);
- }
- else
- {
- char *ifs_chars;
-
- ifs_chars = (quoted_dollar_at || has_dollar_at) ? ifs_value : (char *)NULL;
-
- /* If we have $@, we need to split the results no matter what. If
- IFS is unset or NULL, string_list_dollar_at has separated the
- positional parameters with a space, so we split on space (we have
- set ifs_chars to " \t\n" above if ifs is unset). If IFS is set,
- string_list_dollar_at has separated the positional parameters
- with the first character of $IFS, so we split on $IFS. */
- if (has_dollar_at && ifs_chars)
- list = list_string (istring, *ifs_chars ? ifs_chars : " ", 1);
- else
- {
- tword = make_bare_word (istring);
- if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (quoted_state == WHOLLY_QUOTED))
- tword->flags |= W_QUOTED;
- if (word->flags & W_ASSIGNMENT)
- tword->flags |= W_ASSIGNMENT;
- if (word->flags & W_COMPASSIGN)
- tword->flags |= W_COMPASSIGN;
- if (word->flags & W_NOGLOB)
- tword->flags |= W_NOGLOB;
- if (word->flags & W_NOEXPAND)
- tword->flags |= W_NOEXPAND;
- if (had_quoted_null)
- tword->flags |= W_HASQUOTEDNULL; /* XXX */
- list = make_word_list (tword, (WORD_LIST *)NULL);
- }
- }
-
- free (istring);
- return (list);
-}
-
-/* **************************************************************** */
-/* */
-/* Functions for Quote Removal */
-/* */
-/* **************************************************************** */
-
-/* Perform quote removal on STRING. If QUOTED > 0, assume we are obeying the
- backslash quoting rules for within double quotes or a here document. */
-char *
-string_quote_removal (string, quoted)
- char *string;
- int quoted;
-{
- size_t slen;
- char *r, *result_string, *temp, *send;
- int sindex, tindex, dquote;
- unsigned char c;
- DECLARE_MBSTATE;
-
- /* The result can be no longer than the original string. */
- slen = strlen (string);
- send = string + slen;
-
- r = result_string = (char *)xmalloc (slen + 1);
-
- for (dquote = sindex = 0; c = string[sindex];)
- {
- switch (c)
- {
- case '\\':
- c = string[++sindex];
- if (c == 0)
- {
- *r++ = '\\';
- break;
- }
- if (((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote) && (sh_syntaxtab[c] & CBSDQUOTE) == 0)
- *r++ = '\\';
- /* FALLTHROUGH */
-
- default:
- SCOPY_CHAR_M (r, string, send, sindex);
- break;
-
- case '\'':
- if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote)
- {
- *r++ = c;
- sindex++;
- break;
- }
- tindex = sindex + 1;
- temp = string_extract_single_quoted (string, &tindex);
- if (temp)
- {
- strcpy (r, temp);
- r += strlen (r);
- free (temp);
- }
- sindex = tindex;
- break;
-
- case '"':
- dquote = 1 - dquote;
- sindex++;
- break;
- }
- }
- *r = '\0';
- return (result_string);
-}
-
-#if 0
-/* UNUSED */
-/* Perform quote removal on word WORD. This allocates and returns a new
- WORD_DESC *. */
-WORD_DESC *
-word_quote_removal (word, quoted)
- WORD_DESC *word;
- int quoted;
-{
- WORD_DESC *w;
- char *t;
-
- t = string_quote_removal (word->word, quoted);
- w = alloc_word_desc ();
- w->word = t ? t : savestring ("");
- return (w);
-}
-
-/* Perform quote removal on all words in LIST. If QUOTED is non-zero,
- the members of the list are treated as if they are surrounded by
- double quotes. Return a new list, or NULL if LIST is NULL. */
-WORD_LIST *
-word_list_quote_removal (list, quoted)
- WORD_LIST *list;
- int quoted;
-{
- WORD_LIST *result, *t, *tresult, *e;
-
- for (t = list, result = (WORD_LIST *)NULL; t; t = t->next)
- {
- tresult = make_word_list (word_quote_removal (t->word, quoted), (WORD_LIST *)NULL);
-#if 0
- result = (WORD_LIST *) list_append (result, tresult);
-#else
- if (result == 0)
- result = e = tresult;
- else
- {
- e->next = tresult;
- while (e->next)
- e = e->next;
- }
-#endif
- }
- return (result);
-}
-#endif
-
-/*******************************************
- * *
- * Functions to perform word splitting *
- * *
- *******************************************/
-
-void
-setifs (v)
- SHELL_VAR *v;
-{
- char *t;
- unsigned char uc;
-
- ifs_var = v;
- ifs_value = (v && value_cell (v)) ? value_cell (v) : " \t\n";
-
- /* Should really merge ifs_cmap with sh_syntaxtab. XXX - doesn't yet
- handle multibyte chars in IFS */
- memset (ifs_cmap, '\0', sizeof (ifs_cmap));
- for (t = ifs_value ; t && *t; t++)
- {
- uc = *t;
- ifs_cmap[uc] = 1;
- }
-
-#if defined (HANDLE_MULTIBYTE)
- if (ifs_value == 0)
- {
- ifs_firstc[0] = '\0';
- ifs_firstc_len = 1;
- }
- else
- {
- size_t ifs_len;
- ifs_len = strnlen (ifs_value, MB_CUR_MAX);
- ifs_firstc_len = MBLEN (ifs_value, ifs_len);
- if (ifs_firstc_len == 1 || ifs_firstc_len == 0 || MB_INVALIDCH (ifs_firstc_len))
- {
- ifs_firstc[0] = ifs_value[0];
- ifs_firstc[1] = '\0';
- ifs_firstc_len = 1;
- }
- else
- memcpy (ifs_firstc, ifs_value, ifs_firstc_len);
- }
-#else
- ifs_firstc = ifs_value ? *ifs_value : 0;
-#endif
-}
-
-char *
-getifs ()
-{
- return ifs_value;
-}
-
-/* This splits a single word into a WORD LIST on $IFS, but only if the word
- is not quoted. list_string () performs quote removal for us, even if we
- don't do any splitting. */
-WORD_LIST *
-word_split (w, ifs_chars)
- WORD_DESC *w;
- char *ifs_chars;
-{
- WORD_LIST *result;
-
- if (w)
- {
- char *xifs;
-
- xifs = ((w->flags & W_QUOTED) || ifs_chars == 0) ? "" : ifs_chars;
- result = list_string (w->word, xifs, w->flags & W_QUOTED);
- }
- else
- result = (WORD_LIST *)NULL;
-
- return (result);
-}
-
-/* Perform word splitting on LIST and return the RESULT. It is possible
- to return (WORD_LIST *)NULL. */
-static WORD_LIST *
-word_list_split (list)
- WORD_LIST *list;
-{
- WORD_LIST *result, *t, *tresult, *e;
-
- for (t = list, result = (WORD_LIST *)NULL; t; t = t->next)
- {
- tresult = word_split (t->word, ifs_value);
- if (result == 0)
- result = e = tresult;
- else
- {
- e->next = tresult;
- while (e->next)
- e = e->next;
- }
- }
- return (result);
-}
-
-/**************************************************
- * *
- * Functions to expand an entire WORD_LIST *
- * *
- **************************************************/
-
-/* Do any word-expansion-specific cleanup and jump to top_level */
-static void
-exp_jump_to_top_level (v)
- int v;
-{
- set_pipestatus_from_exit (last_command_exit_value);
-
- /* Cleanup code goes here. */
- expand_no_split_dollar_star = 0; /* XXX */
- expanding_redir = 0;
- assigning_in_environment = 0;
-
- if (parse_and_execute_level == 0)
- top_level_cleanup (); /* from sig.c */
-
- jump_to_top_level (v);
-}
-
-/* Put NLIST (which is a WORD_LIST * of only one element) at the front of
- ELIST, and set ELIST to the new list. */
-#define PREPEND_LIST(nlist, elist) \
- do { nlist->next = elist; elist = nlist; } while (0)
-
-/* Separate out any initial variable assignments from TLIST. If set -k has
- been executed, remove all assignment statements from TLIST. Initial
- variable assignments and other environment assignments are placed
- on SUBST_ASSIGN_VARLIST. */
-static WORD_LIST *
-separate_out_assignments (tlist)
- WORD_LIST *tlist;
-{
- register WORD_LIST *vp, *lp;
-
- if (tlist == 0)
- return ((WORD_LIST *)NULL);
-
- if (subst_assign_varlist)
- dispose_words (subst_assign_varlist); /* Clean up after previous error */
-
- subst_assign_varlist = (WORD_LIST *)NULL;
- vp = lp = tlist;
-
- /* Separate out variable assignments at the start of the command.
- Loop invariant: vp->next == lp
- Loop postcondition:
- lp = list of words left after assignment statements skipped
- tlist = original list of words
- */
- while (lp && (lp->word->flags & W_ASSIGNMENT))
- {
- vp = lp;
- lp = lp->next;
- }
-
- /* If lp != tlist, we have some initial assignment statements.
- We make SUBST_ASSIGN_VARLIST point to the list of assignment
- words and TLIST point to the remaining words. */
- if (lp != tlist)
- {
- subst_assign_varlist = tlist;
- /* ASSERT(vp->next == lp); */
- vp->next = (WORD_LIST *)NULL; /* terminate variable list */
- tlist = lp; /* remainder of word list */
- }
-
- /* vp == end of variable list */
- /* tlist == remainder of original word list without variable assignments */
- if (!tlist)
- /* All the words in tlist were assignment statements */
- return ((WORD_LIST *)NULL);
-
- /* ASSERT(tlist != NULL); */
- /* ASSERT((tlist->word->flags & W_ASSIGNMENT) == 0); */
-
- /* If the -k option is in effect, we need to go through the remaining
- words, separate out the assignment words, and place them on
- SUBST_ASSIGN_VARLIST. */
- if (place_keywords_in_env)
- {
- WORD_LIST *tp; /* tp == running pointer into tlist */
-
- tp = tlist;
- lp = tlist->next;
-
- /* Loop Invariant: tp->next == lp */
- /* Loop postcondition: tlist == word list without assignment statements */
- while (lp)
- {
- if (lp->word->flags & W_ASSIGNMENT)
- {
- /* Found an assignment statement, add this word to end of
- subst_assign_varlist (vp). */
- if (!subst_assign_varlist)
- subst_assign_varlist = vp = lp;
- else
- {
- vp->next = lp;
- vp = lp;
- }
-
- /* Remove the word pointed to by LP from TLIST. */
- tp->next = lp->next;
- /* ASSERT(vp == lp); */
- lp->next = (WORD_LIST *)NULL;
- lp = tp->next;
- }
- else
- {
- tp = lp;
- lp = lp->next;
- }
- }
- }
- return (tlist);
-}
-
-#define WEXP_VARASSIGN 0x001
-#define WEXP_BRACEEXP 0x002
-#define WEXP_TILDEEXP 0x004
-#define WEXP_PARAMEXP 0x008
-#define WEXP_PATHEXP 0x010
-
-/* All of the expansions, including variable assignments at the start of
- the list. */
-#define WEXP_ALL (WEXP_VARASSIGN|WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP)
-
-/* All of the expansions except variable assignments at the start of
- the list. */
-#define WEXP_NOVARS (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP)
-
-/* All of the `shell expansions': brace expansion, tilde expansion, parameter
- expansion, command substitution, arithmetic expansion, word splitting, and
- quote removal. */
-#define WEXP_SHELLEXP (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP)
-
-/* Take the list of words in LIST and do the various substitutions. Return
- a new list of words which is the expanded list, and without things like
- variable assignments. */
-
-WORD_LIST *
-expand_words (list)
- WORD_LIST *list;
-{
- return (expand_word_list_internal (list, WEXP_ALL));
-}
-
-/* Same as expand_words (), but doesn't hack variable or environment
- variables. */
-WORD_LIST *
-expand_words_no_vars (list)
- WORD_LIST *list;
-{
- return (expand_word_list_internal (list, WEXP_NOVARS));
-}
-
-WORD_LIST *
-expand_words_shellexp (list)
- WORD_LIST *list;
-{
- return (expand_word_list_internal (list, WEXP_SHELLEXP));
-}
-
-static WORD_LIST *
-glob_expand_word_list (tlist, eflags)
- WORD_LIST *tlist;
- int eflags;
-{
- char **glob_array, *temp_string;
- register int glob_index;
- WORD_LIST *glob_list, *output_list, *disposables, *next;
- WORD_DESC *tword;
-
- output_list = disposables = (WORD_LIST *)NULL;
- glob_array = (char **)NULL;
- while (tlist)
- {
- /* For each word, either globbing is attempted or the word is
- added to orig_list. If globbing succeeds, the results are
- added to orig_list and the word (tlist) is added to the list
- of disposable words. If globbing fails and failed glob
- expansions are left unchanged (the shell default), the
- original word is added to orig_list. If globbing fails and
- failed glob expansions are removed, the original word is
- added to the list of disposable words. orig_list ends up
- in reverse order and requires a call to REVERSE_LIST to
- be set right. After all words are examined, the disposable
- words are freed. */
- next = tlist->next;
-
- /* If the word isn't an assignment and contains an unquoted
- pattern matching character, then glob it. */
- if ((tlist->word->flags & W_NOGLOB) == 0 &&
- unquoted_glob_pattern_p (tlist->word->word))
- {
- glob_array = shell_glob_filename (tlist->word->word);
-
- /* Handle error cases.
- I don't think we should report errors like "No such file
- or directory". However, I would like to report errors
- like "Read failed". */
-
- if (glob_array == 0 || GLOB_FAILED (glob_array))
- {
- glob_array = (char **)xmalloc (sizeof (char *));
- glob_array[0] = (char *)NULL;
- }
-
- /* Dequote the current word in case we have to use it. */
- if (glob_array[0] == NULL)
- {
- temp_string = dequote_string (tlist->word->word);
- free (tlist->word->word);
- tlist->word->word = temp_string;
- }
-
- /* Make the array into a word list. */
- glob_list = (WORD_LIST *)NULL;
- for (glob_index = 0; glob_array[glob_index]; glob_index++)
- {
- tword = make_bare_word (glob_array[glob_index]);
- tword->flags |= W_GLOBEXP; /* XXX */
- glob_list = make_word_list (tword, glob_list);
- }
-
- if (glob_list)
- {
- output_list = (WORD_LIST *)list_append (glob_list, output_list);
- PREPEND_LIST (tlist, disposables);
- }
- else if (fail_glob_expansion != 0)
- {
- report_error (_("no match: %s"), tlist->word->word);
- exp_jump_to_top_level (DISCARD);
- }
- else if (allow_null_glob_expansion == 0)
- {
- /* Failed glob expressions are left unchanged. */
- PREPEND_LIST (tlist, output_list);
- }
- else
- {
- /* Failed glob expressions are removed. */
- PREPEND_LIST (tlist, disposables);
- }
- }
- else
- {
- /* Dequote the string. */
- temp_string = dequote_string (tlist->word->word);
- free (tlist->word->word);
- tlist->word->word = temp_string;
- PREPEND_LIST (tlist, output_list);
- }
-
- strvec_dispose (glob_array);
- glob_array = (char **)NULL;
-
- tlist = next;
- }
-
- if (disposables)
- dispose_words (disposables);
-
- if (output_list)
- output_list = REVERSE_LIST (output_list, WORD_LIST *);
-
- return (output_list);
-}
-
-#if defined (BRACE_EXPANSION)
-static WORD_LIST *
-brace_expand_word_list (tlist, eflags)
- WORD_LIST *tlist;
- int eflags;
-{
- register char **expansions;
- char *temp_string;
- WORD_LIST *disposables, *output_list, *next;
- WORD_DESC *w;
- int eindex;
-
- for (disposables = output_list = (WORD_LIST *)NULL; tlist; tlist = next)
- {
- next = tlist->next;
-
- if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG))
- {
-/*itrace("brace_expand_word_list: %s: W_COMPASSIGN|W_ASSIGNARG", tlist->word->word);*/
- PREPEND_LIST (tlist, output_list);
- continue;
- }
-
- /* Only do brace expansion if the word has a brace character. If
- not, just add the word list element to BRACES and continue. In
- the common case, at least when running shell scripts, this will
- degenerate to a bunch of calls to `mbschr', and then what is
- basically a reversal of TLIST into BRACES, which is corrected
- by a call to REVERSE_LIST () on BRACES when the end of TLIST
- is reached. */
- if (mbschr (tlist->word->word, LBRACE))
- {
- expansions = brace_expand (tlist->word->word);
-
- for (eindex = 0; temp_string = expansions[eindex]; eindex++)
- {
-#if 0
- w = make_word (temp_string);
-#else
- w = alloc_word_desc ();
- w->word = temp_string;
-#endif
-
- /* If brace expansion didn't change the word, preserve
- the flags. We may want to preserve the flags
- unconditionally someday -- XXX */
- if (STREQ (temp_string, tlist->word->word))
- w->flags = tlist->word->flags;
- else
- w = make_word_flags (w, temp_string);
- output_list = make_word_list (w, output_list);
-#if 0
- free (expansions[eindex]);
-#endif
- }
- free (expansions);
-
- /* Add TLIST to the list of words to be freed after brace
- expansion has been performed. */
- PREPEND_LIST (tlist, disposables);
- }
- else
- PREPEND_LIST (tlist, output_list);
- }
-
- if (disposables)
- dispose_words (disposables);
-
- if (output_list)
- output_list = REVERSE_LIST (output_list, WORD_LIST *);
-
- return (output_list);
-}
-#endif
-
-#if defined (ARRAY_VARS)
-/* Take WORD, a compound associative array assignment, and internally run
- 'declare -A w', where W is the variable name portion of WORD. */
-static int
-make_internal_declare (word, option)
- char *word;
- char *option;
-{
- int t;
- WORD_LIST *wl;
- WORD_DESC *w;
-
- w = make_word (word);
-
- t = assignment (w->word, 0);
- w->word[t] = '\0';
-
- wl = make_word_list (w, (WORD_LIST *)NULL);
- wl = make_word_list (make_word (option), wl);
-
- return (declare_builtin (wl));
-}
-#endif
-
-static WORD_LIST *
-shell_expand_word_list (tlist, eflags)
- WORD_LIST *tlist;
- int eflags;
-{
- WORD_LIST *expanded, *orig_list, *new_list, *next, *temp_list;
- int expanded_something, has_dollar_at;
- char *temp_string;
-
- /* We do tilde expansion all the time. This is what 1003.2 says. */
- new_list = (WORD_LIST *)NULL;
- for (orig_list = tlist; tlist; tlist = next)
- {
- temp_string = tlist->word->word;
-
- next = tlist->next;
-
-#if defined (ARRAY_VARS)
- /* If this is a compound array assignment to a builtin that accepts
- such assignments (e.g., `declare'), take the assignment and perform
- it separately, handling the semantics of declarations inside shell
- functions. This avoids the double-evaluation of such arguments,
- because `declare' does some evaluation of compound assignments on
- its own. */
- if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG))
- {
- int t;
-
- if (tlist->word->flags & W_ASSIGNASSOC)
- make_internal_declare (tlist->word->word, "-A");
-
- t = do_word_assignment (tlist->word, 0);
- if (t == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- exp_jump_to_top_level (DISCARD);
- }
-
- /* Now transform the word as ksh93 appears to do and go on */
- t = assignment (tlist->word->word, 0);
- tlist->word->word[t] = '\0';
- tlist->word->flags &= ~(W_ASSIGNMENT|W_NOSPLIT|W_COMPASSIGN|W_ASSIGNARG|W_ASSIGNASSOC);
- }
-#endif
-
- expanded_something = 0;
- expanded = expand_word_internal
- (tlist->word, 0, 0, &has_dollar_at, &expanded_something);
-
- if (expanded == &expand_word_error || expanded == &expand_word_fatal)
- {
- /* By convention, each time this error is returned,
- tlist->word->word has already been freed. */
- tlist->word->word = (char *)NULL;
-
- /* Dispose our copy of the original list. */
- dispose_words (orig_list);
- /* Dispose the new list we're building. */
- dispose_words (new_list);
-
- last_command_exit_value = EXECUTION_FAILURE;
- if (expanded == &expand_word_error)
- exp_jump_to_top_level (DISCARD);
- else
- exp_jump_to_top_level (FORCE_EOF);
- }
-
- /* Don't split words marked W_NOSPLIT. */
- if (expanded_something && (tlist->word->flags & W_NOSPLIT) == 0)
- {
- temp_list = word_list_split (expanded);
- dispose_words (expanded);
- }
- else
- {
- /* If no parameter expansion, command substitution, process
- substitution, or arithmetic substitution took place, then
- do not do word splitting. We still have to remove quoted
- null characters from the result. */
- word_list_remove_quoted_nulls (expanded);
- temp_list = expanded;
- }
-
- expanded = REVERSE_LIST (temp_list, WORD_LIST *);
- new_list = (WORD_LIST *)list_append (expanded, new_list);
- }
-
- if (orig_list)
- dispose_words (orig_list);
-
- if (new_list)
- new_list = REVERSE_LIST (new_list, WORD_LIST *);
-
- return (new_list);
-}
-
-/* The workhorse for expand_words () and expand_words_no_vars ().
- First arg is LIST, a WORD_LIST of words.
- Second arg EFLAGS is a flags word controlling which expansions are
- performed.
-
- This does all of the substitutions: brace expansion, tilde expansion,
- parameter expansion, command substitution, arithmetic expansion,
- process substitution, word splitting, and pathname expansion, according
- to the bits set in EFLAGS. Words with the W_QUOTED or W_NOSPLIT bits
- set, or for which no expansion is done, do not undergo word splitting.
- Words with the W_NOGLOB bit set do not undergo pathname expansion. */
-static WORD_LIST *
-expand_word_list_internal (list, eflags)
- WORD_LIST *list;
- int eflags;
-{
- WORD_LIST *new_list, *temp_list;
- int tint;
-
- if (list == 0)
- return ((WORD_LIST *)NULL);
-
- garglist = new_list = copy_word_list (list);
- if (eflags & WEXP_VARASSIGN)
- {
- garglist = new_list = separate_out_assignments (new_list);
- if (new_list == 0)
- {
- if (subst_assign_varlist)
- {
- /* All the words were variable assignments, so they are placed
- into the shell's environment. */
- for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next)
- {
- this_command_name = (char *)NULL; /* no arithmetic errors */
- tint = do_word_assignment (temp_list->word, 0);
- /* Variable assignment errors in non-interactive shells
- running in Posix.2 mode cause the shell to exit. */
- if (tint == 0)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- if (interactive_shell == 0 && posixly_correct)
- exp_jump_to_top_level (FORCE_EOF);
- else
- exp_jump_to_top_level (DISCARD);
- }
- }
- dispose_words (subst_assign_varlist);
- subst_assign_varlist = (WORD_LIST *)NULL;
- }
- return ((WORD_LIST *)NULL);
- }
- }
-
- /* Begin expanding the words that remain. The expansions take place on
- things that aren't really variable assignments. */
-
-#if defined (BRACE_EXPANSION)
- /* Do brace expansion on this word if there are any brace characters
- in the string. */
- if ((eflags & WEXP_BRACEEXP) && brace_expansion && new_list)
- new_list = brace_expand_word_list (new_list, eflags);
-#endif /* BRACE_EXPANSION */
-
- /* Perform the `normal' shell expansions: tilde expansion, parameter and
- variable substitution, command substitution, arithmetic expansion,
- and word splitting. */
- new_list = shell_expand_word_list (new_list, eflags);
-
- /* Okay, we're almost done. Now let's just do some filename
- globbing. */
- if (new_list)
- {
- if ((eflags & WEXP_PATHEXP) && disallow_filename_globbing == 0)
- /* Glob expand the word list unless globbing has been disabled. */
- new_list = glob_expand_word_list (new_list, eflags);
- else
- /* Dequote the words, because we're not performing globbing. */
- new_list = dequote_list (new_list);
- }
-
- if ((eflags & WEXP_VARASSIGN) && subst_assign_varlist)
- {
- sh_wassign_func_t *assign_func;
- int is_special_builtin, is_builtin_or_func;
-
- /* If the remainder of the words expand to nothing, Posix.2 requires
- that the variable and environment assignments affect the shell's
- environment. */
- assign_func = new_list ? assign_in_env : do_word_assignment;
- tempenv_assign_error = 0;
-
- is_builtin_or_func = (new_list && new_list->word && (find_shell_builtin (new_list->word->word) || find_function (new_list->word->word)));
- /* Posix says that special builtins exit if a variable assignment error
- occurs in an assignment preceding it. */
- is_special_builtin = (posixly_correct && new_list && new_list->word && find_special_builtin (new_list->word->word));
-
- for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next)
- {
- this_command_name = (char *)NULL;
- assigning_in_environment = (assign_func == assign_in_env);
- tint = (*assign_func) (temp_list->word, is_builtin_or_func);
- assigning_in_environment = 0;
- /* Variable assignment errors in non-interactive shells running
- in Posix.2 mode cause the shell to exit. */
- if (tint == 0)
- {
- if (assign_func == do_word_assignment)
- {
- last_command_exit_value = EXECUTION_FAILURE;
- if (interactive_shell == 0 && posixly_correct && is_special_builtin)
- exp_jump_to_top_level (FORCE_EOF);
- else
- exp_jump_to_top_level (DISCARD);
- }
- else
- tempenv_assign_error++;
- }
- }
-
- dispose_words (subst_assign_varlist);
- subst_assign_varlist = (WORD_LIST *)NULL;
- }
-
-#if 0
- tint = list_length (new_list) + 1;
- RESIZE_MALLOCED_BUFFER (glob_argv_flags, 0, tint, glob_argv_flags_size, 16);
- for (tint = 0, temp_list = new_list; temp_list; temp_list = temp_list->next)
- glob_argv_flags[tint++] = (temp_list->word->flags & W_GLOBEXP) ? '1' : '0';
- glob_argv_flags[tint] = '\0';
-#endif
-
- return (new_list);
-}
+++ /dev/null
-/* subst.h -- Names of externally visible functions in subst.c. */
-
-/* Copyright (C) 1993-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined (_SUBST_H_)
-#define _SUBST_H_
-
-#include "stdc.h"
-
-/* Constants which specify how to handle backslashes and quoting in
- expand_word_internal (). Q_DOUBLE_QUOTES means to use the function
- slashify_in_quotes () to decide whether the backslash should be
- retained. Q_HERE_DOCUMENT means slashify_in_here_document () to
- decide whether to retain the backslash. Q_KEEP_BACKSLASH means
- to unconditionally retain the backslash. Q_PATQUOTE means that we're
- expanding a pattern ${var%#[#%]pattern} in an expansion surrounded
- by double quotes. Q_DOLBRACE means we are expanding a ${...} word, so
- backslashes should also escape { and } and be removed. */
-#define Q_DOUBLE_QUOTES 0x01
-#define Q_HERE_DOCUMENT 0x02
-#define Q_KEEP_BACKSLASH 0x04
-#define Q_PATQUOTE 0x08
-#define Q_QUOTED 0x10
-#define Q_ADDEDQUOTES 0x20
-#define Q_QUOTEDNULL 0x40
-#define Q_DOLBRACE 0x80
-
-/* Flag values controlling how assignment statements are treated. */
-#define ASS_APPEND 0x01
-#define ASS_MKLOCAL 0x02
-#define ASS_MKASSOC 0x04
-
-/* Flags for the string extraction functions. */
-#define SX_NOALLOC 0x0001 /* just skip; don't return substring */
-#define SX_VARNAME 0x0002 /* variable name; for string_extract () */
-#define SX_REQMATCH 0x0004 /* closing/matching delimiter required */
-#define SX_COMMAND 0x0008 /* extracting a shell script/command */
-#define SX_NOCTLESC 0x0010 /* don't honor CTLESC quoting */
-#define SX_NOESCCTLNUL 0x0020 /* don't let CTLESC quote CTLNUL */
-#define SX_NOLONGJMP 0x0040 /* don't longjmp on fatal error */
-#define SX_ARITHSUB 0x0080 /* extracting $(( ... )) (currently unused) */
-#define SX_POSIXEXP 0x0100 /* extracting new Posix pattern removal expansions in extract_dollar_brace_string */
-
-/* Remove backslashes which are quoting backquotes from STRING. Modifies
- STRING, and returns a pointer to it. */
-extern char * de_backslash __P((char *));
-
-/* Replace instances of \! in a string with !. */
-extern void unquote_bang __P((char *));
-
-/* Extract the $( construct in STRING, and return a new string.
- Start extracting at (SINDEX) as if we had just seen "$(".
- Make (SINDEX) get the position just after the matching ")".
- XFLAGS is additional flags to pass to other extraction functions, */
-extern char *extract_command_subst __P((char *, int *, int));
-
-/* Extract the $[ construct in STRING, and return a new string.
- Start extracting at (SINDEX) as if we had just seen "$[".
- Make (SINDEX) get the position just after the matching "]". */
-extern char *extract_arithmetic_subst __P((char *, int *));
-
-#if defined (PROCESS_SUBSTITUTION)
-/* Extract the <( or >( construct in STRING, and return a new string.
- Start extracting at (SINDEX) as if we had just seen "<(".
- Make (SINDEX) get the position just after the matching ")". */
-extern char *extract_process_subst __P((char *, char *, int *));
-#endif /* PROCESS_SUBSTITUTION */
-
-/* Extract the name of the variable to bind to from the assignment string. */
-extern char *assignment_name __P((char *));
-
-/* Return a single string of all the words present in LIST, separating
- each word with SEP. */
-extern char *string_list_internal __P((WORD_LIST *, char *));
-
-/* Return a single string of all the words present in LIST, separating
- each word with a space. */
-extern char *string_list __P((WORD_LIST *));
-
-/* Turn $* into a single string, obeying POSIX rules. */
-extern char *string_list_dollar_star __P((WORD_LIST *));
-
-/* Expand $@ into a single string, obeying POSIX rules. */
-extern char *string_list_dollar_at __P((WORD_LIST *, int));
-
-/* Turn the positional paramters into a string, understanding quoting and
- the various subtleties of using the first character of $IFS as the
- separator. Calls string_list_dollar_at, string_list_dollar_star, and
- string_list as appropriate. */
-extern char *string_list_pos_params __P((int, WORD_LIST *, int));
-
-/* Perform quoted null character removal on each element of LIST.
- This modifies LIST. */
-extern void word_list_remove_quoted_nulls __P((WORD_LIST *));
-
-/* This performs word splitting and quoted null character removal on
- STRING. */
-extern WORD_LIST *list_string __P((char *, char *, int));
-
-extern char *ifs_firstchar __P((int *));
-extern char *get_word_from_string __P((char **, char *, char **));
-extern char *strip_trailing_ifs_whitespace __P((char *, char *, int));
-
-/* Given STRING, an assignment string, get the value of the right side
- of the `=', and bind it to the left side. If EXPAND is true, then
- perform tilde expansion, parameter expansion, command substitution,
- and arithmetic expansion on the right-hand side. Do not perform word
- splitting on the result of expansion. */
-extern int do_assignment __P((char *));
-extern int do_assignment_no_expand __P((char *));
-extern int do_word_assignment __P((WORD_DESC *, int));
-
-/* Append SOURCE to TARGET at INDEX. SIZE is the current amount
- of space allocated to TARGET. SOURCE can be NULL, in which
- case nothing happens. Gets rid of SOURCE by free ()ing it.
- Returns TARGET in case the location has changed. */
-extern char *sub_append_string __P((char *, char *, int *, int *));
-
-/* Append the textual representation of NUMBER to TARGET.
- INDEX and SIZE are as in SUB_APPEND_STRING. */
-extern char *sub_append_number __P((intmax_t, char *, int *, int *));
-
-/* Return the word list that corresponds to `$*'. */
-extern WORD_LIST *list_rest_of_args __P((void));
-
-/* Make a single large string out of the dollar digit variables,
- and the rest_of_args. If DOLLAR_STAR is 1, then obey the special
- case of "$*" with respect to IFS. */
-extern char *string_rest_of_args __P((int));
-
-extern int number_of_args __P((void));
-
-/* Expand STRING by performing parameter expansion, command substitution,
- and arithmetic expansion. Dequote the resulting WORD_LIST before
- returning it, but do not perform word splitting. The call to
- remove_quoted_nulls () is made here because word splitting normally
- takes care of quote removal. */
-extern WORD_LIST *expand_string_unsplit __P((char *, int));
-
-/* Expand the rhs of an assignment statement. */
-extern WORD_LIST *expand_string_assignment __P((char *, int));
-
-/* Expand a prompt string. */
-extern WORD_LIST *expand_prompt_string __P((char *, int, int));
-
-/* Expand STRING just as if you were expanding a word. This also returns
- a list of words. Note that filename globbing is *NOT* done for word
- or string expansion, just when the shell is expanding a command. This
- does parameter expansion, command substitution, arithmetic expansion,
- and word splitting. Dequote the resultant WORD_LIST before returning. */
-extern WORD_LIST *expand_string __P((char *, int));
-
-/* Convenience functions that expand strings to strings, taking care of
- converting the WORD_LIST * returned by the expand_string* functions
- to a string and deallocating the WORD_LIST *. */
-extern char *expand_string_to_string __P((char *, int));
-extern char *expand_string_unsplit_to_string __P((char *, int));
-extern char *expand_assignment_string_to_string __P((char *, int));
-
-/* Expand an arithmetic expression string */
-extern char *expand_arith_string __P((char *, int));
-
-/* De-quote quoted characters in STRING. */
-extern char *dequote_string __P((char *));
-
-/* De-quote CTLESC-escaped CTLESC or CTLNUL characters in STRING. */
-extern char *dequote_escapes __P((char *));
-
-/* De-quote quoted characters in each word in LIST. */
-extern WORD_LIST *dequote_list __P((WORD_LIST *));
-
-/* Expand WORD, performing word splitting on the result. This does
- parameter expansion, command substitution, arithmetic expansion,
- word splitting, and quote removal. */
-extern WORD_LIST *expand_word __P((WORD_DESC *, int));
-
-/* Expand WORD, but do not perform word splitting on the result. This
- does parameter expansion, command substitution, arithmetic expansion,
- and quote removal. */
-extern WORD_LIST *expand_word_unsplit __P((WORD_DESC *, int));
-extern WORD_LIST *expand_word_leave_quoted __P((WORD_DESC *, int));
-
-/* Return the value of a positional parameter. This handles values > 10. */
-extern char *get_dollar_var_value __P((intmax_t));
-
-/* Quote a string to protect it from word splitting. */
-extern char *quote_string __P((char *));
-
-/* Quote escape characters (characters special to interals of expansion)
- in a string. */
-extern char *quote_escapes __P((char *));
-
-/* And remove such quoted special characters. */
-extern char *remove_quoted_escapes __P((char *));
-
-/* Remove CTLNUL characters from STRING unless they are quoted with CTLESC. */
-extern char *remove_quoted_nulls __P((char *));
-
-/* Perform quote removal on STRING. If QUOTED > 0, assume we are obeying the
- backslash quoting rules for within double quotes. */
-extern char *string_quote_removal __P((char *, int));
-
-/* Perform quote removal on word WORD. This allocates and returns a new
- WORD_DESC *. */
-extern WORD_DESC *word_quote_removal __P((WORD_DESC *, int));
-
-/* Perform quote removal on all words in LIST. If QUOTED is non-zero,
- the members of the list are treated as if they are surrounded by
- double quotes. Return a new list, or NULL if LIST is NULL. */
-extern WORD_LIST *word_list_quote_removal __P((WORD_LIST *, int));
-
-/* Called when IFS is changed to maintain some private variables. */
-extern void setifs __P((SHELL_VAR *));
-
-/* Return the value of $IFS, or " \t\n" if IFS is unset. */
-extern char *getifs __P((void));
-
-/* This splits a single word into a WORD LIST on $IFS, but only if the word
- is not quoted. list_string () performs quote removal for us, even if we
- don't do any splitting. */
-extern WORD_LIST *word_split __P((WORD_DESC *, char *));
-
-/* Take the list of words in LIST and do the various substitutions. Return
- a new list of words which is the expanded list, and without things like
- variable assignments. */
-extern WORD_LIST *expand_words __P((WORD_LIST *));
-
-/* Same as expand_words (), but doesn't hack variable or environment
- variables. */
-extern WORD_LIST *expand_words_no_vars __P((WORD_LIST *));
-
-/* Perform the `normal shell expansions' on a WORD_LIST. These are
- brace expansion, tilde expansion, parameter and variable substitution,
- command substitution, arithmetic expansion, and word splitting. */
-extern WORD_LIST *expand_words_shellexp __P((WORD_LIST *));
-
-extern WORD_DESC *command_substitute __P((char *, int));
-extern char *pat_subst __P((char *, char *, char *, int));
-
-extern int fifos_pending __P((void));
-extern int num_fifos __P((void));
-extern void unlink_fifo_list __P((void));
-extern void unlink_fifo __P((int));
-
-extern char *copy_fifo_list __P((int *));
-extern void unlink_new_fifos __P((char *, int));
-extern void close_new_fifos __P((char *, int));
-
-extern WORD_LIST *list_string_with_quotes __P((char *));
-
-#if defined (ARRAY_VARS)
-extern char *extract_array_assignment_list __P((char *, int *));
-#endif
-
-#if defined (COND_COMMAND)
-extern char *remove_backslashes __P((char *));
-extern char *cond_expand_word __P((WORD_DESC *, int));
-#endif
-
-/* Flags for skip_to_delim */
-#define SD_NOJMP 0x01 /* don't longjmp on fatal error. */
-#define SD_INVERT 0x02 /* look for chars NOT in passed set */
-#define SD_NOQUOTEDELIM 0x04 /* don't let single or double quotes act as delimiters */
-#define SD_NOSKIPCMD 0x08 /* don't skip over $(, <(, or >( command/process substitution */
-#define SD_EXTGLOB 0x10 /* skip over extended globbing patterns if appropriate */
-
-extern int skip_to_delim __P((char *, int, char *, int));
-
-#if defined (READLINE)
-extern int char_is_quoted __P((char *, int));
-extern int unclosed_pair __P((char *, int, char *));
-extern WORD_LIST *split_at_delims __P((char *, int, char *, int, int, int *, int *));
-#endif
-
-/* Variables used to keep track of the characters in IFS. */
-extern SHELL_VAR *ifs_var;
-extern char *ifs_value;
-extern unsigned char ifs_cmap[];
-
-#if defined (HANDLE_MULTIBYTE)
-extern unsigned char ifs_firstc[];
-extern size_t ifs_firstc_len;
-#else
-extern unsigned char ifs_firstc;
-#endif
-
-/* Evaluates to 1 if C is a character in $IFS. */
-#define isifs(c) (ifs_cmap[(unsigned char)(c)] != 0)
-
-/* How to determine the quoted state of the character C. */
-#define QUOTED_CHAR(c) ((c) == CTLESC)
-
-/* Is the first character of STRING a quoted NULL character? */
-#define QUOTED_NULL(string) ((string)[0] == CTLNUL && (string)[1] == '\0')
-
-#endif /* !_SUBST_H_ */
+++ /dev/null
-#! /bin/sh
-#
-# shobj-conf -- output a series of variable assignments to be substituted
-# into a Makefile by configure which specify system-dependent
-# information for creating shared objects that may be loaded
-# into bash with `enable -f'
-#
-# usage: shobj-conf [-C compiler] -c host_cpu -o host_os -v host_vendor
-#
-# Chet Ramey
-# chet@po.cwru.edu
-
-# Copyright (C) 1996-2009 Free Software Foundation, Inc.
-#
-# This file is part of GNU Bash, the Bourne Again SHell.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-
-#
-# defaults
-#
-SHOBJ_STATUS=supported
-SHLIB_STATUS=supported
-
-SHOBJ_CC=cc
-SHOBJ_CFLAGS=
-SHOBJ_LD=
-SHOBJ_LDFLAGS=
-SHOBJ_XLDFLAGS=
-SHOBJ_LIBS=
-
-SHLIB_XLDFLAGS=
-SHLIB_LIBS=
-
-SHLIB_DOT='.'
-SHLIB_LIBPREF='lib'
-SHLIB_LIBSUFF='so'
-
-SHLIB_LIBVERSION='$(SHLIB_LIBSUFF)'
-SHLIB_DLLVERSION='$(SHLIB_MAJOR)'
-
-PROGNAME=`basename $0`
-USAGE="$PROGNAME [-C compiler] -c host_cpu -o host_os -v host_vendor"
-
-while [ $# -gt 0 ]; do
- case "$1" in
- -C) shift; SHOBJ_CC="$1"; shift ;;
- -c) shift; host_cpu="$1"; shift ;;
- -o) shift; host_os="$1"; shift ;;
- -v) shift; host_vendor="$1"; shift ;;
- *) echo "$USAGE" >&2 ; exit 2;;
- esac
-done
-
-case "${host_os}-${SHOBJ_CC}-${host_vendor}" in
-sunos4*-*gcc*)
- SHOBJ_CFLAGS=-fpic
- SHOBJ_LD=/usr/bin/ld
- SHOBJ_LDFLAGS='-assert pure-text'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)$(SHLIB_MINOR)'
- ;;
-
-sunos4*)
- SHOBJ_CFLAGS=-pic
- SHOBJ_LD=/usr/bin/ld
- SHOBJ_LDFLAGS='-assert pure-text'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)$(SHLIB_MINOR)'
- ;;
-
-sunos5*-*gcc*|solaris2*-*gcc*)
- SHOBJ_LD='${CC}'
- ld_used=`gcc -print-prog-name=ld`
- if ${ld_used} -V 2>&1 | grep GNU >/dev/null 2>&1; then
- # This line works for the GNU ld
- SHOBJ_LDFLAGS='-shared -Wl,-h,$@'
- # http://sourceware.org/ml/binutils/2001-08/msg00361.html
- SHOBJ_CFLAGS=-fPIC
- else
- # This line works for the Solaris linker in /usr/ccs/bin/ld
- SHOBJ_LDFLAGS='-shared -Wl,-i -Wl,-h,$@'
- SHOBJ_CFLAGS=-fpic
- fi
-
-# SHLIB_XLDFLAGS='-R $(libdir)'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-sunos5*|solaris2*)
- SHOBJ_CFLAGS='-K pic'
- SHOBJ_LD=/usr/ccs/bin/ld
- SHOBJ_LDFLAGS='-G -dy -z text -i -h $@'
-
-# SHLIB_XLDFLAGS='-R $(libdir)'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-# All versions of Linux (including Gentoo/FreeBSD) or the semi-mythical GNU Hurd.
-linux*-*|gnu*-*|k*bsd*-gnu-*|freebsd*-gentoo)
- SHOBJ_CFLAGS=-fPIC
- SHOBJ_LD='${CC}'
- SHOBJ_LDFLAGS='-shared -Wl,-soname,$@'
-
- SHLIB_XLDFLAGS='-Wl,-rpath,$(libdir) -Wl,-soname,`basename $@ $(SHLIB_MINOR)`'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)$(SHLIB_MINOR)'
- ;;
-
-freebsd2*)
- SHOBJ_CFLAGS=-fpic
- SHOBJ_LD=ld
- SHOBJ_LDFLAGS='-x -Bshareable'
-
- SHLIB_XLDFLAGS='-R$(libdir)'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)$(SHLIB_MINOR)'
- ;;
-
-# FreeBSD-3.x ELF
-freebsd3*|freebsdaout*)
- SHOBJ_CFLAGS=-fPIC
- SHOBJ_LD='${CC}'
-
- if [ -x /usr/bin/objformat ] && [ "`/usr/bin/objformat`" = "elf" ]; then
- SHOBJ_LDFLAGS='-shared -Wl,-soname,$@'
-
- SHLIB_XLDFLAGS='-Wl,-rpath,$(libdir)'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- else
- SHOBJ_LDFLAGS='-shared'
-
- SHLIB_XLDFLAGS='-R$(libdir)'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)$(SHLIB_MINOR)'
- fi
- ;;
-
-# FreeBSD-4.x and later have only ELF
-freebsd[4-9]*|freebsdelf*|dragonfly*)
- SHOBJ_CFLAGS=-fPIC
- SHOBJ_LD='${CC}'
-
- SHOBJ_LDFLAGS='-shared -Wl,-soname,$@'
- SHLIB_XLDFLAGS='-Wl,-rpath,$(libdir)'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-# Darwin/MacOS X
-darwin[89]*|darwin10*)
- SHOBJ_STATUS=supported
- SHLIB_STATUS=supported
-
- SHOBJ_CFLAGS='-fno-common'
-
- SHOBJ_LD='MACOSX_DEPLOYMENT_TARGET=10.3 ${CC}'
-
- SHLIB_LIBVERSION='$(SHLIB_MAJOR)$(SHLIB_MINOR).$(SHLIB_LIBSUFF)'
- SHLIB_LIBSUFF='dylib'
-
- SHOBJ_LDFLAGS='-dynamiclib -dynamic -undefined dynamic_lookup -arch_only `/usr/bin/arch`'
- SHLIB_XLDFLAGS='-dynamiclib -arch_only `/usr/bin/arch` -install_name $(libdir)/$@ -current_version $(SHLIB_MAJOR)$(SHLIB_MINOR) -compatibility_version $(SHLIB_MAJOR) -v'
-
- SHLIB_LIBS='-lncurses' # see if -lcurses works on MacOS X 10.1
- ;;
-
-darwin*|macosx*)
- SHOBJ_STATUS=unsupported
- SHLIB_STATUS=supported
-
- SHOBJ_CFLAGS='-fno-common'
-
- SHOBJ_LD='${CC}'
-
- SHLIB_LIBVERSION='$(SHLIB_MAJOR)$(SHLIB_MINOR).$(SHLIB_LIBSUFF)'
- SHLIB_LIBSUFF='dylib'
-
- case "${host_os}" in
- darwin[789]*|darwin10*) SHOBJ_LDFLAGS=''
- SHLIB_XLDFLAGS='-dynamiclib -arch_only `/usr/bin/arch` -install_name $(libdir)/$@ -current_version $(SHLIB_MAJOR)$(SHLIB_MINOR) -compatibility_version $(SHLIB_MAJOR) -v'
- ;;
- *) SHOBJ_LDFLAGS='-dynamic'
- SHLIB_XLDFLAGS='-arch_only `/usr/bin/arch` -install_name $(libdir)/$@ -current_version $(SHLIB_MAJOR)$(SHLIB_MINOR) -compatibility_version $(SHLIB_MAJOR) -v'
- ;;
- esac
-
- SHLIB_LIBS='-lncurses' # see if -lcurses works on MacOS X 10.1
- ;;
-
-openbsd*|netbsd*)
- SHOBJ_CFLAGS=-fPIC
- SHOBJ_LD='${CC}'
- SHOBJ_LDFLAGS='-shared'
-
- SHLIB_XLDFLAGS='-R$(libdir)'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)$(SHLIB_MINOR)'
- ;;
-
-bsdi2*)
- SHOBJ_CC=shlicc2
- SHOBJ_CFLAGS=
- SHOBJ_LD=ld
- SHOBJ_LDFLAGS=-r
- SHOBJ_LIBS=-lc_s.2.1.0
-
- # BSD/OS 2.x and 3.x `shared libraries' are too much of a pain in
- # the ass -- they require changing {/usr/lib,etc}/shlib.map on
- # each system, and the library creation process is byzantine
- SHLIB_STATUS=unsupported
- ;;
-
-bsdi3*)
- SHOBJ_CC=shlicc2
- SHOBJ_CFLAGS=
- SHOBJ_LD=ld
- SHOBJ_LDFLAGS=-r
- SHOBJ_LIBS=-lc_s.3.0.0
-
- # BSD/OS 2.x and 3.x `shared libraries' are too much of a pain in
- # the ass -- they require changing {/usr/lib,etc}/shlib.map on
- # each system, and the library creation process is byzantine
- SHLIB_STATUS=unsupported
- ;;
-
-bsdi4*)
- # BSD/OS 4.x now supports ELF and SunOS-style dynamically-linked
- # shared libraries. gcc 2.x is the standard compiler, and the
- # `normal' gcc options should work as they do in Linux.
-
- SHOBJ_CFLAGS=-fPIC
- SHOBJ_LD='${CC}'
- SHOBJ_LDFLAGS='-shared -Wl,-soname,$@'
-
- SHLIB_XLDFLAGS='-Wl,-soname,`basename $@ $(SHLIB_MINOR)`'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)$(SHLIB_MINOR)'
- ;;
-
-osf*-*gcc*)
- # Fix to use gcc linker driver from bfischer@TechFak.Uni-Bielefeld.DE
- SHOBJ_LD='${CC}'
- SHOBJ_LDFLAGS='-shared -Wl,-soname,$@'
-
- SHLIB_XLDFLAGS='-rpath $(libdir)'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-osf*)
- SHOBJ_LD=ld
- SHOBJ_LDFLAGS='-shared -soname $@ -expect_unresolved "*"'
-
- SHLIB_XLDFLAGS='-rpath $(libdir)'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-aix4.[2-9]*-*gcc*|aix[5-9].*-*gcc*) # lightly tested by jik@cisco.com
- SHOBJ_CFLAGS=-fpic
- SHOBJ_LD='ld'
- SHOBJ_LDFLAGS='-bdynamic -bnoentry -bexpall'
- SHOBJ_XLDFLAGS='-G'
-
- SHLIB_XLDFLAGS='-bM:SRE'
- SHLIB_LIBS='-lcurses -lc'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-aix4.[2-9]*|aix[5-9].*)
- SHOBJ_CFLAGS=-K
- SHOBJ_LD='ld'
- SHOBJ_LDFLAGS='-bdynamic -bnoentry -bexpall'
- SHOBJ_XLDFLAGS='-G'
-
- SHLIB_XLDFLAGS='-bM:SRE'
- SHLIB_LIBS='-lcurses -lc'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-#
-# THE FOLLOWING ARE UNTESTED -- and some may not support the dlopen interface
-#
-irix[56]*-*gcc*)
- SHOBJ_CFLAGS='-fpic'
- SHOBJ_LD='${CC}'
- SHOBJ_LDFLAGS='-shared -Wl,-soname,$@'
-
- SHLIB_XLDFLAGS='-Wl,-rpath,$(libdir)'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-irix[56]*)
- SHOBJ_CFLAGS='-K PIC'
- SHOBJ_LD=ld
-# SHOBJ_LDFLAGS='-call_shared -hidden_symbol -no_unresolved -soname $@'
-# Change from David Kaelbling <drk@sgi.com>. If you have problems,
-# remove the `-no_unresolved'
- SHOBJ_LDFLAGS='-shared -no_unresolved -soname $@'
-
- SHLIB_XLDFLAGS='-rpath $(libdir)'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-hpux9*-*gcc*)
- # must use gcc; the bundled cc cannot compile PIC code
- SHOBJ_CFLAGS='-fpic'
- SHOBJ_LD='${CC}'
- SHOBJ_LDFLAGS='-shared -Wl,-b -Wl,+s'
-
- SHLIB_XLDFLAGS='-Wl,+b,$(libdir)'
- SHLIB_LIBSUFF='sl'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-hpux9*)
- SHOBJ_STATUS=unsupported
- SHLIB_STATUS=unsupported
-
- # If you are using the HP ANSI C compiler, you can uncomment and use
- # this code (I have not tested it)
-# SHOBJ_STATUS=supported
-# SHLIB_STATUS=supported
-#
-# SHOBJ_CFLAGS='+z'
-# SHOBJ_LD='ld'
-# SHOBJ_LDFLAGS='-b +s'
-#
-# SHLIB_XLDFLAGS='+b $(libdir)'
-# SHLIB_LIBSUFF='sl'
-# SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
-
- ;;
-
-hpux10*-*gcc*)
- # must use gcc; the bundled cc cannot compile PIC code
- SHOBJ_CFLAGS='-fpic'
- SHOBJ_LD='${CC}'
- # if you have problems linking here, moving the `-Wl,+h,$@' from
- # SHLIB_XLDFLAGS to SHOBJ_LDFLAGS has been reported to work
- SHOBJ_LDFLAGS='-shared -fpic -Wl,-b -Wl,+s'
-
- SHLIB_XLDFLAGS='-Wl,+h,$@ -Wl,+b,$(libdir)'
- SHLIB_LIBSUFF='sl'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-hpux10*)
- SHOBJ_STATUS=unsupported
- SHLIB_STATUS=unsupported
-
- # If you are using the HP ANSI C compiler, you can uncomment and use
- # this code (I have not tested it)
-# SHOBJ_STATUS=supported
-# SHLIB_STATUS=supported
-#
-# SHOBJ_CFLAGS='+z'
-# SHOBJ_LD='ld'
-# SHOBJ_LDFLAGS='-b +s +h $@'
-#
-# SHLIB_XLDFLAGS='+b $(libdir)'
-# SHLIB_LIBSUFF='sl'
-# SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
-
- ;;
-
-hpux11*-*gcc*)
- # must use gcc; the bundled cc cannot compile PIC code
- SHOBJ_CFLAGS='-fpic'
- SHOBJ_LD='${CC}'
-# SHOBJ_LDFLAGS='-shared -Wl,-b -Wl,-B,symbolic -Wl,+s -Wl,+std -Wl,+h,$@'
- SHOBJ_LDFLAGS='-shared -fpic -Wl,-b -Wl,+s -Wl,+h,$@'
-
- SHLIB_XLDFLAGS='-Wl,+b,$(libdir)'
- SHLIB_LIBSUFF='sl'
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-hpux11*)
- SHOBJ_STATUS=unsupported
- SHLIB_STATUS=unsupported
-
- # If you are using the HP ANSI C compiler, you can uncomment and use
- # this code (I have not tested it)
-# SHOBJ_STATUS=supported
-# SHLIB_STATUS=supported
-#
-# SHOBJ_CFLAGS='+z'
-# SHOBJ_LD='ld'
-# SHOBJ_LDFLAGS='-b +s +h $@'
-#
-# SHLIB_XLDFLAGS='+b $(libdir)'
-# SHLIB_LIBSUFF='sl'
-# SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
-
- ;;
-
-sysv4*-*gcc*)
- SHOBJ_CFLAGS=-shared
- SHOBJ_LDFLAGS='-shared -h $@'
- SHOBJ_LD='${CC}'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-sysv4*)
- SHOBJ_CFLAGS='-K PIC'
- SHOBJ_LD=ld
- SHOBJ_LDFLAGS='-dy -z text -G -h $@'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-sco3.2v5*-*gcc*)
- SHOBJ_CFLAGS='-fpic' # DEFAULTS TO ELF
- SHOBJ_LD='${CC}'
- SHOBJ_LDFLAGS='-shared'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-sco3.2v5*)
- SHOBJ_CFLAGS='-K pic -b elf'
- SHOBJ_LD=ld
- SHOBJ_LDFLAGS='-G -b elf -dy -z text -h $@'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-sysv5uw7*-*gcc*)
- SHOBJ_CFLAGS='-fpic'
- SHOBJ_LD='${CC}'
- SHOBJ_LDFLAGS='-shared'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-sysv5uw7*)
- SHOBJ_CFLAGS='-K PIC'
- SHOBJ_LD=ld
- SHOBJ_LDFLAGS='-G -dy -z text -h $@'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-sysv5UnixWare*-*gcc*)
- SHOBJ_CFLAGS=-fpic
- SHOBJ_LD='${CC}'
- SHOBJ_LDFLAGS='-shared'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-sysv5UnixWare*)
- SHOBJ_CFLAGS='-K PIC'
- SHOBJ_LD=ld
- SHOBJ_LDFLAGS='-G -dy -z text -h $@'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-sysv5OpenUNIX*-*gcc*)
- SHOBJ_CFLAGS=-fpic
- SHOBJ_LD='${CC}'
- SHOBJ_LDFLAGS='-shared'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-sysv5OpenUNIX*)
- SHOBJ_CFLAGS='-K PIC'
- SHOBJ_LD=ld
- SHOBJ_LDFLAGS='-G -dy -z text -h $@'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-dgux*-*gcc*)
- SHOBJ_CFLAGS=-fpic
- SHOBJ_LD='${CC}'
- SHOBJ_LDFLAGS='-shared'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-dgux*)
- SHOBJ_CFLAGS='-K pic'
- SHOBJ_LD=ld
- SHOBJ_LDFLAGS='-G -dy -h $@'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-msdos*)
- SHOBJ_STATUS=unsupported
- SHLIB_STATUS=unsupported
- ;;
-
-cygwin*)
- SHOBJ_LD='$(CC)'
- SHOBJ_LDFLAGS='-shared -Wl,--enable-auto-import -Wl,--enable-auto-image-base -Wl,--export-all -Wl,--out-implib=$(@).a'
- SHLIB_LIBPREF='cyg'
- SHLIB_LIBSUFF='dll'
- SHLIB_LIBVERSION='$(SHLIB_DLLVERSION).$(SHLIB_LIBSUFF)'
- SHLIB_LIBS='$(TERMCAP_LIB)'
-
- SHLIB_DOT=
- # For official cygwin releases, DLLVERSION will be defined in the
- # environment of configure, and will be incremented any time the API
- # changes in a non-backwards compatible manner. Otherwise, it is just
- # SHLIB_MAJOR.
- if [ -n "$DLLVERSION" ] ; then
- SHLIB_DLLVERSION="$DLLVERSION"
- fi
- ;;
-
-mingw*)
- SHOBJ_LD='$(CC)'
- SHOBJ_LDFLAGS='-shared -Wl,--enable-auto-import -Wl,--enable-auto-image-base -Wl,--export-all -Wl,--out-implib=$(@).a'
- SHLIB_LIBSUFF='dll'
- SHLIB_LIBVERSION='$(SHLIB_DLLVERSION).$(SHLIB_LIBSUFF)'
- SHLIB_LIBS='$(TERMCAP_LIB)'
-
- SHLIB_DOT=
- # For official cygwin releases, DLLVERSION will be defined in the
- # environment of configure, and will be incremented any time the API
- # changes in a non-backwards compatible manner. Otherwise, it is just
- # SHLIB_MAJOR.
- if [ -n "$DLLVERSION" ] ; then
- SHLIB_DLLVERSION="$DLLVERSION"
- fi
- ;;
-
-#
-# Rely on correct gcc configuration for everything else
-#
-*-*gcc*)
- SHOBJ_CFLAGS=-fpic
- SHOBJ_LD='${CC}'
- SHOBJ_LDFLAGS='-shared'
-
- SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
- ;;
-
-*)
- SHOBJ_STATUS=unsupported
- SHLIB_STATUS=unsupported
- ;;
-
-esac
-
-echo SHOBJ_CC=\'"$SHOBJ_CC"\'
-echo SHOBJ_CFLAGS=\'"$SHOBJ_CFLAGS"\'
-echo SHOBJ_LD=\'"$SHOBJ_LD"\'
-echo SHOBJ_LDFLAGS=\'"$SHOBJ_LDFLAGS"\'
-echo SHOBJ_XLDFLAGS=\'"$SHOBJ_XLDFLAGS"\'
-echo SHOBJ_LIBS=\'"$SHOBJ_LIBS"\'
-
-echo SHLIB_XLDFLAGS=\'"$SHLIB_XLDFLAGS"\'
-echo SHLIB_LIBS=\'"$SHLIB_LIBS"\'
-
-echo SHLIB_DOT=\'"$SHLIB_DOT"\'
-
-echo SHLIB_LIBPREF=\'"$SHLIB_LIBPREF"\'
-echo SHLIB_LIBSUFF=\'"$SHLIB_LIBSUFF"\'
-
-echo SHLIB_LIBVERSION=\'"$SHLIB_LIBVERSION"\'
-echo SHLIB_DLLVERSION=\'"$SHLIB_DLLVERSION"\'
-
-echo SHOBJ_STATUS=\'"$SHOBJ_STATUS"\'
-echo SHLIB_STATUS=\'"$SHLIB_STATUS"\'
-
-exit 0
+++ /dev/null
-BUILD_DIR=/usr/local/build/chet/bash/bash-current
-THIS_SH=$BUILD_DIR/bash
-PATH=$PATH:$BUILD_DIR
-
-export THIS_SH PATH
-
-rm -f /tmp/xx
-
-/bin/sh "$@"
+++ /dev/null
-
-./array.tests: line 15: syntax error near unexpected token `&'
-./array.tests: line 15: `test=(first & second)'
-1
-abcde
-abcde
-abcde bdef
-abcde bdef
-declare -a BASH_ARGC='()'
-declare -a BASH_ARGV='()'
-declare -a BASH_LINENO='([0]="0")'
-declare -a BASH_SOURCE='([0]="./array.tests")'
-declare -a DIRSTACK='()'
-declare -a FUNCNAME='([0]="main")'
-declare -a a='([0]="abcde" [1]="" [2]="bdef")'
-declare -a b='()'
-declare -ar c='()'
-abcde bdef
-abcde bdef
-abcde
-abcde
-abcde
-
-bdef
-hello world
-11
-3
-bdef hello world test expression test 2
-./array.tests: line 76: readonly: `a[5]': not a valid identifier
-declare -ar a='([1]="" [2]="bdef" [5]="hello world" [6]="test expression" [15]="test 2")'
-declare -ar c='()'
-declare -ar a='([1]="" [2]="bdef" [5]="hello world" [6]="test expression" [15]="test 2")'
-declare -ar c='()'
-readonly -a a='([1]="" [2]="bdef" [5]="hello world" [6]="test expression" [15]="test 2")'
-readonly -a c='()'
-a test
-declare -a BASH_ARGC='()'
-declare -a BASH_ARGV='()'
-declare -a BASH_LINENO='([0]="0")'
-declare -a BASH_SOURCE='([0]="./array.tests")'
-declare -a DIRSTACK='()'
-declare -a FUNCNAME='([0]="main")'
-declare -ar a='([1]="" [2]="bdef" [5]="hello world" [6]="test expression" [15]="test 2")'
-declare -a b='([0]="this" [1]="is" [2]="a" [3]="test" [4]="" [5]="/etc/passwd")'
-declare -ar c='()'
-declare -a d='([1]="" [2]="bdef" [5]="hello world" [6]="test" [9]="ninth element")'
-declare -a e='([0]="test")'
-declare -a f='([0]="" [1]="bdef" [2]="hello world" [3]="test" [4]="ninth element")'
-./array.tests: line 100: a: readonly variable
-./array.tests: line 102: b[]: bad array subscript
-./array.tests: line 103: b[*]: bad array subscript
-./array.tests: line 104: ${b[ ]}: bad substitution
-./array.tests: line 106: c[-2]: bad array subscript
-./array.tests: line 107: c: bad array subscript
-
-./array.tests: line 109: d[7]: cannot assign list to array member
-./array.tests: line 111: []=abcde: bad array subscript
-./array.tests: line 111: [*]=last: cannot assign to non-numeric index
-./array.tests: line 111: [-65]=negative: bad array subscript
-declare -a BASH_ARGC='()'
-declare -a BASH_ARGV='()'
-declare -a BASH_LINENO='([0]="0")'
-declare -a BASH_SOURCE='([0]="./array.tests")'
-declare -a DIRSTACK='()'
-declare -a FUNCNAME='([0]="main")'
-declare -ar a='([1]="" [2]="bdef" [5]="hello world" [6]="test expression" [15]="test 2")'
-declare -a b='([0]="this" [1]="is" [2]="a" [3]="test" [4]="" [5]="/etc/passwd")'
-declare -ar c='()'
-declare -a d='([1]="test test")'
-declare -a f='([0]="" [1]="bdef" [2]="hello world" [3]="test" [4]="ninth element")'
-./array.tests: line 119: unset: ps1: not an array variable
-./array.tests: line 123: declare: c: cannot destroy array variables in this way
-this of
-this is a test of read using arrays
-this test
-this is a test of arrays
-declare -a BASH_ARGC='()'
-declare -a BASH_ARGV='()'
-declare -a BASH_LINENO='([0]="0")'
-declare -a BASH_SOURCE='([0]="./array.tests")'
-declare -a DIRSTACK='()'
-declare -a FUNCNAME='([0]="main")'
-declare -ar a='([1]="" [2]="bdef" [5]="hello world" [6]="test expression" [15]="test 2")'
-declare -a b='([0]="this" [1]="is" [2]="a" [3]="test" [4]="" [5]="/etc/passwd")'
-declare -ar c='()'
-declare -a d='([1]="test test")'
-declare -a f='([0]="" [1]="bdef" [2]="hello world" [3]="test" [4]="ninth element")'
-declare -a rv='([0]="this" [1]="is" [2]="a" [3]="test" [4]="of" [5]="read" [6]="using" [7]="arrays")'
-abde
-abde
-bbb
-efgh
-wxyz
-wxyz
-./array.tests
-a
-b c
-d
-e f g
-h
-./array.tests
-a
-b c
-d
-e f g
-h
-/bin /usr/bin /usr/ucb /usr/local/bin . /sbin /usr/sbin
-bin bin ucb bin . sbin sbin
-bin
-/ / / / / /
-/
-argv[1] = <bin>
-argv[1] = </>
-argv[1] = <sbin>
-argv[1] = </>
-\bin \usr/bin \usr/ucb \usr/local/bin . \sbin \usr/sbin
-\bin \usr\bin \usr\ucb \usr\local\bin . \sbin \usr\sbin
-\bin \usr\bin \usr\ucb \usr\local\bin . \sbin \usr\sbin
-4 -- 4
-7 -- 7
-55
-49
-6 -- 6
-42 14 44
-grep [ 123 ] *
-6 7 9
-6 7 9 5
-length = 3
-value = new1 new2 new3
-./array.tests: line 239: narray: unbound variable
-./array1.sub: line 1: syntax error near unexpected token `('
-./array1.sub: line 1: `printf "%s\n" -a a=(a 'b c')'
-./array2.sub: line 1: syntax error near unexpected token `('
-./array2.sub: line 1: `declare -a ''=(a 'b c')'
-9
-9
-
-
-7 8 9
-8 11
-8 11
-6
-6
-nordholz
-8
-8
-8
-
-a b c d e f g
-for case if then else
-<> < > !
-12 14 16 18 20
-4414758999202
-aaa bbb
-./array.tests: line 289: syntax error near unexpected token `<>'
-./array.tests: line 289: `metas=( <> < > ! )'
-./array.tests: line 290: syntax error near unexpected token `<>'
-./array.tests: line 290: `metas=( [1]=<> [2]=< [3]=> [4]=! )'
-abc 3
-case 4
-abc case if then else 5
-abc case if then else 5
-0
-case 4
-case if then else 5
-case if then else 5
-argv[1] = <0>
-argv[2] = <1>
-argv[3] = <4>
-argv[4] = <10>
-argv[1] = <0>
-argv[2] = <1>
-argv[3] = <4>
-argv[4] = <10>
-argv[1] = <0>
-argv[2] = <1>
-argv[3] = <4>
-argv[4] = <10>
-argv[1] = <0 1 4 10>
-include null element -- expect one
-one
-include unset element -- expect three five
-three five
-start at unset element -- expect five seven
-five seven
-too many elements -- expect three five seven
-three five seven
-positive offset - expect five seven
-five seven
-negative offset to unset element - expect seven
-seven
-positive offset 2 - expect seven
-seven
-negative offset 2 - expect seven
-seven
-out-of-range offset
-
-e
-4
-1 4 7 10
-'b
-b c
-$0
-t
-[3]=abcde r s t u v
-e
-9
-2
-a b c
-argv[1] = <"-iname '"a>
-argv[2] = <"-iname '"b>
-argv[3] = <"-iname '"c>
-'hey'
-hey
-''hey
-'hey'
-argv[1] = <c>
-argv[2] = <d>
-argv[3] = <e>
-argv[4] = <f>
-argv[1] = <c d>
-argv[2] = <e f>
-argv[1] = <c d>
-argv[2] = <e f>
-argv[1] = <c d>
-argv[2] = <e f>
-argv[1] = <"-iname '"abc>
-argv[2] = <"-iname '"def>
-argv[1] = <-iname 'abc>
-argv[2] = <-iname 'def>
-argv[1] = <-iname \'abc>
-argv[2] = <-iname \'def>
-argv[1] = <-iname>
-argv[2] = <'abc>
-argv[3] = <-iname>
-argv[4] = <'def>
-argv[1] = <"-iname '"abc>
-argv[2] = <"-iname '"def>
-argv[1] = <-iname 'abc>
-argv[2] = <-iname 'def>
-*.* OK
-1
-a1 2 3c
-argv[1] = <var with spaces>
-argv[1] = <var with spaces>
-argv[1] = <var with spacesab>
-argv[2] = <cd>
-argv[3] = <ef>
-argv[1] = <var with spacesab>
-argv[2] = <cd>
-argv[3] = <ef>
-argv[1] = <var with spacesab>
-argv[2] = <cd>
-argv[3] = <ef>
-argv[1] = <var with spacesab>
-argv[2] = <cd>
-argv[3] = <ef>
-argv[1] = <var with spacesab>
-argv[2] = <cd>
-argv[3] = <ef>
-argv[1] = <var with spacesab>
-argv[2] = <cd>
-argv[3] = <ef>
-2
-argv[1] = <element1 with spaces>
-argv[2] = <element2 with spaces>
-argv[1] = <element1 with spaces>
-argv[2] = <element2 with spaces>
-nord!olz
-
-rdholz
-
-rdholz
-rdho
-
-
-argv[1] = <fooq//barq/>
-argv[1] = <fooq>
-argv[2] = <>
-argv[3] = <barq>
-argv[4] = <>
-argv[1] = <foo!//bar!/>
-argv[1] = <foo!>
-argv[2] = <>
-argv[3] = <bar!>
-argv[4] = <>
-argv[1] = <ooq//arq/>
-argv[1] = <ooq>
-argv[2] = <>
-argv[3] = <arq>
-argv[4] = <>
-argv[1] = <Fooq//Barq/>
-argv[1] = <Fooq>
-argv[2] = <>
-argv[3] = <Barq>
-argv[4] = <>
-argv[1] = <FOOQ//BARQ/>
-argv[1] = <FOOQ>
-argv[2] = <>
-argv[3] = <BARQ>
-argv[4] = <>
-126
-127
-128
-argv[1] = <\80>
-argv[1] = <~>
-argv[2] = <^?>
-argv[3] = <\80>
-argv[1] = <~>
-argv[2] = <^?>
-argv[3] = <\80>
-argv[1] = <~>
-argv[2] = <^?>
-argv[3] = <\80>
-Monday Tuesday Wednesday Thursday Friday Saturday Sunday
-Monday
-Monday
-Tuesday
-Monday
-Monday
-Tuesday
-Monday
-Tuesday
-Wednesday
-Monday
-Tuesday
-Wednesday
-monday, monday, tuesday
-wednesday, wednesday, thursday
-monday, monday, tuesday
-Wednesday, Wednesday, Thursday
-nday
-esday
-dnesday
-nday
-esday
-dnesday
-onday
-uesday
-ednesday
-onday
-uesday
-ednesday
-version[agent]
-version.agent
-version[agent]
-version.agent
-version[agent] foo[bar]
-version.agent bowl
-foobar] foo foo[bar]
-bleh bbb bleh
+++ /dev/null
-# this is needed so that the bad assignments (b[]=bcde, for example) do not
-# cause fatal shell errors when in posix mode
-set +o posix
-
-set +a
-# The calls to egrep -v are to filter out builtin array variables that are
-# automatically set and possibly contain values that vary.
-
-# first make sure we handle the basics
-x=()
-echo ${x[@]}
-unset x
-
-# this should be an error
-test=(first & second)
-echo $?
-unset test
-
-# make sure declare -a converts an existing variable to an array
-unset a
-a=abcde
-declare -a a
-echo ${a[0]}
-
-unset a
-a=abcde
-a[2]=bdef
-
-unset b
-declare -a b[256]
-
-unset c[2]
-unset c[*]
-
-a[1]=
-
-_ENV=/bin/true
-x=${_ENV[(_$-=0)+(_=1)-_${-%%*i*}]}
-
-declare -r c[100]
-
-echo ${a[0]} ${a[4]}
-echo ${a[@]}
-
-echo ${a[*]}
-
-# this should print out values, too
-declare -a | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'
-
-unset a[7]
-echo ${a[*]}
-
-unset a[4]
-echo ${a[*]}
-
-echo ${a}
-echo "${a}"
-echo $a
-
-unset a[0]
-echo ${a}
-
-echo ${a[@]}
-
-a[5]="hello world"
-echo ${a[5]}
-echo ${#a[5]}
-
-echo ${#a[@]}
-
-a[4+5/2]="test expression"
-declare a["7 + 8"]="test 2"
-a[7 + 8]="test 2"
-echo ${a[@]}
-
-readonly a[5]
-readonly a
-# these two lines should output `declare' commands
-readonly -a | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'
-declare -ar | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'
-# this line should output `readonly' commands, even for arrays
-set -o posix
-readonly -a | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'
-set +o posix
-
-declare -a d='([1]="" [2]="bdef" [5]="hello world" "test")'
-d[9]="ninth element"
-
-declare -a e[10]=test # this works in post-bash-2.05 versions
-declare -a e[10]='(test)'
-
-pass=/etc/passwd
-declare -a f='("${d[@]}")'
-b=([0]=this [1]=is [2]=a [3]=test [4]="$PS1" [5]=$pass)
-
-echo ${b[@]:2:3}
-
-declare -pa | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'
-
-a[3]="this is a test"
-
-b[]=bcde
-b[*]=aaa
-echo ${b[ ]}
-
-c[-2]=4
-echo ${c[-4]}
-
-d[7]=(abdedfegeee)
-
-d=([]=abcde [1]="test test" [*]=last [-65]=negative )
-
-unset d[12]
-unset e[*]
-
-declare -a | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'
-
-ps1='hello'
-unset ps1[2]
-unset ${ps1[2]}
-
-declare +a ps1
-declare +a c
-
-# the prompt should not print when using a here doc
-read -p "array test: " -a rv <<!
-this is a test of read using arrays
-!
-
-echo ${rv[0]} ${rv[4]}
-echo ${rv[@]}
-
-# the variable should be converted to an array when `read -a' is done
-vv=1
-read -a vv <<!
-this is a test of arrays
-!
-echo ${vv[0]} ${vv[3]}
-echo ${vv[@]}
-unset vv
-
-declare -a | egrep -v '(BASH_VERSINFO|PIPESTATUS|GROUPS)'
-
-export rv
-#set
-
-x[4]=bbb
-x=abde
-echo $x
-echo ${x[0]}
-echo ${x[4]}
-echo efgh | ( read x[1] ; echo ${x[1]} )
-echo wxyz | ( declare -a x ; read x ; echo $x ; echo ${x[0]} )
-
-# Make sure that arrays can be used to save the positional paramters verbatim
-set -- a 'b c' d 'e f g' h
-
-ARGV=( [0]=$0 "$@" )
-
-for z in "${ARGV[@]}"
-do
- echo "$z"
-done
-
-echo "$0"
-for z in "$@"
-do
- echo "$z"
-done
-
-# do various pattern removal and length tests
-XPATH=/bin:/usr/bin:/usr/ucb:/usr/local/bin:.:/sbin:/usr/sbin
-
-xpath=( $( IFS=: ; echo $XPATH ) )
-
-echo ${xpath[@]}
-echo ${xpath[@]##*/}
-echo ${xpath[0]##*/}
-echo ${xpath[@]%%[!/]*}
-echo ${xpath[0]%%[!/]*}
-recho ${xpath##*/}
-recho ${xpath%%[!/]*}
-recho ${xpath[5]##*/}
-recho ${xpath[5]%%[!/]*}
-
-# let's try to make it a DOS-style path
-
-zecho "${xpath[@]/\//\\}"
-zecho "${xpath[@]//\//\\}"
-zecho "${xpath[@]//[\/]/\\}"
-
-# length of the first element of the array, since array without subscript
-# is equivalent to referencing first element
-echo ${#xpath} -- ${#xpath[0]}
-
-# number of elements in the array
-nelem=${#xpath[@]}
-echo ${#xpath[@]} -- $nelem
-
-# total length of all elements in the array, including space separators
-xx="${xpath[*]}"
-echo ${#xx}
-
-# total length of all elements in the array
-xx=$( IFS='' ; echo "${xpath[*]}" )
-echo ${#xx}
-
-unset xpath[nelem-1]
-
-nelem=${#xpath[@]}
-echo ${#xpath[@]} -- $nelem
-
-# arrays and things that look like index assignments
-array=(42 [1]=14 [2]=44)
-
-array2=(grep [ 123 ] \*)
-
-echo ${array[@]}
-echo "${array2[@]}"
-
-# arrays and implicit arithmetic evaluation
-declare -i -a iarray
-
-iarray=( 2+4 1+6 7+2 )
-echo ${iarray[@]}
-
-iarray[4]=4+1
-echo ${iarray[@]}
-
-# make sure assignment using the compound assignment syntax removes all
-# of the old elements from the array value
-barray=(old1 old2 old3 old4 old5)
-barray=(new1 new2 new3)
-echo "length = ${#barray[@]}"
-echo "value = ${barray[*]}"
-
-# make sure the array code behaves correctly with respect to unset variables
-set -u
-( echo ${#narray[4]} )
-
-${THIS_SH} ./array1.sub
-${THIS_SH} ./array2.sub
-
-# some old bugs and ksh93 compatibility tests
-${THIS_SH} ./array3.sub
-
-# some compound assingment parsing problems that showed up in bash-3.1-release
-${THIS_SH} ./array4.sub
-
-set +u
-cd /tmp
-
-touch 1=bar
-foo=([10]="bar")
-echo ${foo[0]}
-rm 1=bar
-
-cd $OLDPWD
-
-foo=(a b c d e f g)
-echo ${foo[@]}
-
-# quoted reserved words are ok
-foo=(\for \case \if \then \else)
-echo ${foo[@]}
-
-# quoted metacharacters are ok
-foo=( [1]='<>' [2]='<' [3]='>' [4]='!' )
-echo ${foo[@]}
-
-# numbers are just words when not in a redirection context
-foo=( 12 14 16 18 20 )
-echo ${foo[@]}
-
-foo=( 4414758999202 )
-echo ${foo[@]}
-
-# this was a bug in all versions of bash 2.x up to and including bash-2.04
-declare -a ddd=(aaa
-bbb)
-echo ${ddd[@]}
-
-# errors until post-bash-2.05a; now reserved words are OK
-foo=(a b c for case if then else)
-
-foo=(for case if then else)
-
-# errors
-metas=( <> < > ! )
-metas=( [1]=<> [2]=< [3]=> [4]=! )
-
-# various expansions that didn't really work right until post-bash-2.04
-foo='abc'
-echo ${foo[0]} ${#foo[0]}
-echo ${foo[1]} ${#foo[1]}
-echo ${foo[@]} ${#foo[@]}
-echo ${foo[*]} ${#foo[*]}
-
-foo=''
-echo ${foo[0]} ${#foo[0]}
-echo ${foo[1]} ${#foo[1]}
-echo ${foo[@]} ${#foo[@]}
-echo ${foo[*]} ${#foo[*]}
-
-# new expansions added after bash-2.05b
-x[0]=zero
-x[1]=one
-x[4]=four
-x[10]=ten
-
-recho ${!x[@]}
-recho "${!x[@]}"
-recho ${!x[*]}
-recho "${!x[*]}"
-
-# sparse array tests for code fixed in bash-3.0
-unset av
-av[1]='one'
-av[2]=''
-
-av[3]=three
-av[5]=five
-av[7]=seven
-
-echo include null element -- expect one
-echo ${av[@]:1:2} # what happens when we include a null element?
-echo include unset element -- expect three five
-echo ${av[@]:3:2} # what happens when we include an unset element?
-echo start at unset element -- expect five seven
-echo ${av[@]:4:2} # what happens when we start at an unset element?
-
-echo too many elements -- expect three five seven
-echo ${av[@]:3:5} # how about too many elements?
-
-echo positive offset - expect five seven
-echo ${av[@]:5:2}
-echo negative offset to unset element - expect seven
-echo ${av[@]: -2:2}
-
-echo positive offset 2 - expect seven
-echo ${av[@]: 6:2}
-echo negative offset 2 - expect seven
-echo ${av[@]: -1:2}
-
-echo out-of-range offset
-echo ${av[@]:12}
-
-# parsing problems and other inconsistencies not fixed until post bash-3.0
-unset x
-declare -a x=(')' $$)
-[ ${x[1]} -eq $$ ] || echo bad
-
-unset x
-declare -a x=(a b c d e)
-echo ${x[4]}
-
-z=([1]=one [4]=four [7]=seven [10]=ten)
-
-echo ${#z[@]}
-
-echo ${!z[@]}
-
-unset x
-declare -a x=(a \'b c\')
-
-echo "${x[1]}"
-
-unset x
-declare -a x=(a 'b c')
-
-echo "${x[1]}"
-
-unset x
-declare -a x=($0)
-[ "${x[@]}" = $0 ] || echo double expansion of \$0
-declare -a x=(\$0)
-echo "${x[@]}"
-
-# tests for bash-3.1 problems
-${THIS_SH} ./array5.sub
-
-# tests for post-bash-3.2 problems, most fixed in bash-3.2 patches
-${THIS_SH} ./array6.sub
-${THIS_SH} ./array7.sub
-
-${THIS_SH} ./array8.sub
-
-${THIS_SH} ./array9.sub
-
-${THIS_SH} ./array10.sub
-
-${THIS_SH} ./array11.sub
+++ /dev/null
-#
-# A suite of tests for bash word expansions
-#
-# This tests parameter and variable expansion, with an empahsis on
-# proper quoting behavior.
-#
-# Chet Ramey
-
-#
-# If you comment out the body of this function, you can do a diff against
-# `expansion-tests.right' to see if the shell is behaving correctly
-#
-expect()
-{
- echo expect "$@"
-}
-
-# Test the substitution quoting characters (CTLESC and CTLNUL) in different
-# combinations
-
-expect "<^A>"
-recho `echo '\ 1'`
-expect "<^A>"
-recho `echo "\ 1"`
-expect "<^B>"
-recho `echo '\ 2'`
-expect "<^B>"
-recho `echo "\ 2"`
-expect "<^A>"
-recho `echo \ 1`
-expect "<^B>"
-recho `echo \ 2`
-
-# Test null strings without variable expansion
-expect "<abcdefgh>"
-recho abcd""efgh
-expect "<abcdefgh>"
-recho abcd''efgh
-expect "<abcdefgh>"
-recho ""abcdefgh
-expect "<abcdefgh>"
-recho ''abcdefgh
-expect "<abcd>"
-recho abcd""
-expect "<abcd>"
-recho abcd''
-
-# Test the quirky behavior of $@ in ""
-expect nothing
-recho "$@"
-expect "< >"
-recho " $@"
-expect "<-->"
-recho "-${@}-"
-
-# Test null strings with variable expansion that fails
-expect '<>'
-recho $xxx""
-expect '<>'
-recho ""$xxx
-expect '<>'
-recho $xxx''
-expect '<>'
-recho ''$xxx
-expect '<>'
-recho $xxx""$yyy
-expect '<>'
-recho $xxx''$yyy
-
-# Test null strings with variable expansion that succeeds
-xxx=abc
-yyy=def
-
-expect '<abc>'
-recho $xxx""
-expect '<abc>'
-recho ""$xxx
-expect '<abc>'
-recho $xxx''
-expect '<abc>'
-recho ''$xxx
-expect '<abcdef>'
-recho $xxx""$yyy
-expect '<abcdef>'
-recho $xxx''$yyy
-
-unset xxx yyy
-
-# Test the unquoted special quoting characters
-expect "<^A>"
-recho \ 1
-expect "<^B>"
-recho \ 2
-expect "<^A>"
-recho "\ 1"
-expect "<^B>"
-recho "\ 2"
-expect "<^A>"
-recho '\ 1'
-expect "<^B>"
-recho '\ 2'
-
-# Test expansion of a variable that is unset
-expect nothing
-recho $xxx
-expect '<>'
-recho "$xxx"
-
-expect nothing
-recho "$xxx${@}"
-
-# Test empty string expansion
-expect '<>'
-recho ""
-expect '<>'
-recho ''
-
-# Test command substitution with (disabled) history substitution
-expect '<Hello World!>'
-# set +H
-recho "`echo \"Hello world!\"`"
-
-# Test some shell special characters
-expect '<`>'
-recho "\`"
-expect '<">'
-recho "\""
-expect '<\^A>'
-recho "\\ 1"
-
-expect '<\$>'
-recho "\\$"
-
-expect '<\\>'
-recho "\\\\"
-
-# This should give argv[1] = a argv[2] = b
-expect '<a> <b>'
-FOO=`echo 'a b' | tr ' ' '\012'`
-recho $FOO
-
-# This should give argv[1] = ^A argv[2] = ^B
-expect '<^A> <^B>'
-FOO=`echo '\ 1 \ 2' | tr ' ' '\012'`
-recho $FOO
-
-# Test quoted and unquoted globbing characters
-expect '<**>'
-recho "*"*
-
-expect '<\.\./*/>'
-recho "\.\./*/"
-
-# Test patterns that come up when the shell quotes funny character
-# combinations
-expect '<^A^B^A^B>'
-recho '\ 1\ 2\ 1\ 2'
-expect '<^A^A>'
-recho '\ 1\ 1'
-expect '<^A^B>'
-recho '\ 1\ 2'
-expect '<^A^A^B>'
-recho '\ 1\ 1\ 2'
-
-# More tests of "$@"
-set abc def ghi jkl
-expect '< abc> <def> <ghi> <jkl >'
-recho " $@ "
-expect '< abc> <def> <ghi> <jkl >'
-recho "${1+ $@ }"
-
-set abc def ghi jkl
-expect '<--abc> <def> <ghi> <jkl-->'
-recho "--$@--"
-
-set "a b" cd ef gh
-expect '<a b> <cd> <ef> <gh>'
-recho ${1+"$@"}
-expect '<a b> <cd> <ef> <gh>'
-recho ${foo:-"$@"}
-expect '<a b> <cd> <ef> <gh>'
-recho "${@}"
-
-expect '< >'
-recho " "
-expect '< - >'
-recho " - "
-
-# Test combinations of different types of quoting in a fully-quoted string
-# (so the WHOLLY_QUOTED tests fail and it doesn't get set)
-expect '</^root:/{s/^[^:]*:[^:]*:\([^:]*\).*$/\1/>'
-recho "/^root:/{s/^[^:]*:[^:]*:\([^:]*\).*"'$'"/\1/"
-
-# Test the various Posix parameter expansions
-
-expect '<foo bar>'
-recho "${x:-$(echo "foo bar")}"
-expect '<foo> <bar>'
-recho ${x:-$(echo "foo bar")}
-
-unset X
-expect '<abc>'
-recho ${X:=abc}
-expect '<abc>'
-recho $X
-
-set a b c
-expect '<posix>'
-recho ${3:+posix}
-
-POSIX=/usr/posix
-expect '<10>'
-recho ${#POSIX}
-
-# remove shortest trailing match
-x=file.c
-expect '<file.o>'
-recho ${x%.c}.o
-
-# remove longest trailing match
-x=posix/src/std
-expect '<posix>'
-recho ${x%%/*}
-
-# remove shortest leading pattern
-x=$HOME/src/cmd
-expect '</src/cmd>'
-recho ${x#$HOME}
-
-# remove longest leading pattern
-x=/one/two/three
-expect '<three>'
-recho ${x##*/}
-
-# pattern removal of patterns that don't match
-z=abcdef
-
-expect '<abcdef>'
-recho ${z#xyz}
-expect '<abcdef>'
-recho ${z##xyz}
-
-expect '<abcdef>'
-recho ${z%xyz}
-expect '<abcdef>'
-recho ${z%%xyz}
-
-# Command substitution and the quirky differences between `` and $()
-
-expect '<\$x>'
-recho '\$x'
-
-expect '<$x>'
-recho `echo '\$x'`
-
-expect '<\$x>'
-recho $(echo '\$x')
-
-# The difference between $* "$*" and "$@"
-
-set "abc" "def ghi" "jkl"
-
-expect '<abc> <def> <ghi> <jkl>'
-recho $*
-
-expect '<abc def ghi jkl>'
-recho "$*"
-
-OIFS="$IFS"
-IFS=":$IFS"
-
-# The special behavior of "$*", using the first character of $IFS as separator
-expect '<abc:def ghi:jkl>'
-recho "$*"
-
-IFS="$OIFS"
-
-expect '<abc> <def ghi> <jkl>'
-recho "$@"
-
-expect '<xxabc> <def ghi> <jklyy>'
-recho "xx$@yy"
-
-expect '<abc> <def ghi> <jklabc> <def ghi> <jkl>'
-recho "$@$@"
-
-foo=abc
-bar=def
-
-expect '<abcdef>'
-recho "$foo""$bar"
-
-unset foo
-set $foo bar '' xyz "$foo" abc
-
-expect '<bar> <> <xyz> <> <abc>'
-recho "$@"
-
-# More tests of quoting and deferred evaluation
-
-foo=10 x=foo
-y='$'$x
-expect '<$foo>'
-recho $y
-eval y='$'$x
-expect '<10>'
-recho $y
-
-# case statements
-
-NL='
-'
-x='ab
-cd'
-
-expect '<newline expected>'
-case "$x" in
-*$NL*) recho "newline expected" ;;
-esac
-
-expect '<got it>'
-case \? in
-*"?"*) recho "got it" ;;
-esac
-
-expect '<got it>'
-case \? in
-*\?*) recho "got it" ;;
-esac
-
-set one two three four five
-expect '<one> <three> <five>'
-recho $1 $3 ${5} $8 ${9}
-
-# length tests on positional parameters and some special parameters
-
-expect '<5> <5>'
-recho $# ${#}
-expect '<3>'
-recho ${#1}
-expect '<1>'
-recho ${##}
-expect '<1>'
-recho ${#?}
-expect '<5>'
-recho ${#@}
-expect '<5>'
-recho ${#*}
-expect '<5>'
-recho "${#@}"
-expect '<5>'
-recho "${#*}"
-
-expect '<42>'
-recho $((28 + 14))
-expect '<26>'
-recho $[ 13 * 2 ]
-
-expect '<\>'
-recho `echo \\\\`
-
-expect '<~>'
-recho '~'
-
-expect nothing
-recho $!
-expect nothing
-recho ${!}
-
-# test word splitting of assignment statements not preceding a command
-a="a b c d e"
-declare b=$a
-expect '<a> <b> <c> <d> <e>'
-recho $b
-
-a="a?b?c"
-
-echo ${a//\\?/ }
-
-echo ${a//\?/ }
-
-${THIS_SH} ./exp1.sub
-
-${THIS_SH} ./exp2.sub
-
-${THIS_SH} ./exp3.sub
-
-${THIS_SH} ./exp4.sub
+++ /dev/null
-var='[hello'
-echo "${var//[/}"
-
-red='\[\e[0;31m\]'
-echo "${red//\\[\\e/}"
-
-foo="${red//\\[\\e/}"
-
-# foo == [0;31m\]
-echo "${foo//[0;31m\\/}"
-
-echo "${var//[]/}"
-echo "${red//[]/}"
-
-v=hello
-foo='[:alpha:]'
-
-echo ${v//[[:alpha:]]/}
-echo ${v//[[:alpha]]/}
-echo ${v//[[:alpha]/}
+++ /dev/null
-LC_ALL=C
-LANG=C
-trap 'rm /tmp/newhistory' 0
-
-file=bax
-histchars='!^#' # make sure history comment char is set correctly
-
-unset HISTFILESIZE
-
-history -c
-
-HISTFILE=history.list
-HISTCONTROL=ignoreboth
-HISTIGNORE='&:#*:history*:fc*'
-# we will end up exercising the history stifling code as a result
-HISTSIZE=32
-
-shopt -s cmdhist
-set -o history
-
-history -p '!!'
-
-# this should result in a failed history expansion error
-history -p '!!:z'
-
-history
-
-HISTFILE=/tmp/newhistory
-history -a
-
-history -w
-
-history -s "echo line 2 for history"
-history
-history -p '!e'
-history -p '!!'
-
-set -H
-!!
-!e
-
-history
-
-echo a b c d e
-!?ch?
-!-2
-^2^8
-
-!2
-
-# we're selecting /bin/sh -c ...; we want `sh'
-echo !-1:0:t
-# we're selecting /bin/sh -c ...; we want `/bin'
-echo !-2:0:h
-# we're selecting `echo a b c d e'; we want `e'
-echo !?d?:5
-
-echo a b c d e
-echo !-1:2-$
-echo !-2:2-4
-echo !-2:3*
-echo !!:*
-
-echo !?a?:2-
-
-echo file.c
-echo !!:$:r
-echo !-2:$:e
-echo !-3:$:r:q
-
-echo $file.c
-echo !!:$:r
-echo !-2:^:e
-echo !-3:$:r:q
-
-echo a b c d e
-echo !!:1-$:x
-echo !-2:1-$:q
-
-echo foo.c foo.o foo.html foo.h
-!!:s/foo/bar/
-!-2:gs/foo/bar/
-!!:gs/bar/x&/
-!-2:g&
-
-# make sure we can use any delimiter in the substitution, not just `/'
-!!:gs+bar+whix+
-
-!!:p
-
-# wow
-echo !?.o?:%:r:q
-
-!!:0 !?.h?:%:q
-!!:-$
-!:-$
-
-history
-
-# make sure single quotes inhibit history expansion
-echo '!!'
-
-# make sure backslashes can quote the history expansion character
-echo \!\!
-
-# but other expansions on the line should still be processed
-
-echo '!!' !!:*
-history -c
-unset HISTFILE
-
-# make sure that the special bash cases are not history expanded
-case p in
-[!A-Z]) echo ok 1;;
-esac
-
-var1='ok 2'
-var2=var1
-
-echo ${!var2}
-
-# Bash-2.01[.1] fails this test -- it attempts history expansion after the
-# history_comment_char
-echo ok 3 # !1200
+++ /dev/null
-:; ./shx
-
-sh:
-<&$fd ok
-nlbq Mon Aug 3 02:45:00 EDT 1992
-bang geoff
-quote 712824302
-setbq defmsgid=<1992Aug3.024502.6176@host>
-bgwait sleep done... wait 6187
-
-
-bash:
-<&$fd ok
-nlbq Mon Aug 3 02:45:09 EDT 1992
-bang geoff
-quote 712824311
-setbq defmsgid=<1992Aug3.024512.6212@host>
-bgwait sleep done... wait 6223
-
-
-ash:
-<&$fd shx1: 4: Syntax error: Bad fd number
-nlbq Mon Aug 3 02:45:19 EDT 1992
-bang geoff
-quote getdate: `"now"' not a valid date
-
-setbq defmsgid=<1992Aug3.` echo 024521
-bgwait sleep done... wait 6241
-
-
-ksh:
-<&$fd ok
-nlbq ./shx: 6248 Memory fault - core dumped
-bang geoff
-quote getdate: `"now"' not a valid date
-
-setbq defmsgid=<1992Aug3.024530.6257@host>
-bgwait no such job: 6265
-wait 6265
-sleep done...
-
-zsh:
-<&$fd ok
-nlbq Mon Aug 3 02:45:36 EDT 1992
-bang shx3: event not found: /s/ [4]
-quote 712824337
-setbq defmsgid=<..6290@host>
-bgwait shx7: unmatched " [9]
-sleep done...
-:;
+++ /dev/null
-#! /bin/sh
-for cmd in sh bash ash ksh zsh
-do
- echo
- echo $cmd:
- for demo in shx?
- do
- $cmd $demo
- done
-done
+++ /dev/null
-selvecs='&m68kcoff_vec'
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS='$selvecs'}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS=\'$selvecs\'}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS="$selvecs"}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS=\"$selvecs\"}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS=\\$selvecs\\}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS=$selvecs}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS=\$selvecs}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS="\$selvecs"}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS='$selvecs'"$null"}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS="\\$selvecs"}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS="\'$selvecs\'"}"
-
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS='$selvecs'}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS=\'$selvecs\'}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS="$selvecs"}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS=\"$selvecs\"}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS=\\$selvecs\\}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS=$selvecs}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS=\$selvecs}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS="\$selvecs"}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS='$selvecs'"$null"}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS="\\$selvecs"}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS="\'$selvecs\'"}
-
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS="\p"}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS=\p}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS="\\"}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS=\\}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS=\'}"
-recho "TDEFAULTS = ${selvecs:+-DSELECT_VECS="\'"}"
-
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS="\p"}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS=\p}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS="\\"}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS=\\}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS=\'}
-recho TDEFAULTS = ${selvecs:+-DSELECT_VECS="\'"}
-
-# more tests for bash-3.0 behavior
-
-var="a*b" ; echo "${var//\\*/}"
-var="a*b" ; echo "${var//\*/}"
-
-var="a?b" ; echo "${var//\\?/}"
-var="a?b" ; echo "${var//\?/}"
-
-var="a/b" ; echo "${var//\\//}"
-var="a/b" ; echo "${var//\//}"
+++ /dev/null
-${THIS_SH} ./heredoc.tests > /tmp/xx 2>&1
-diff /tmp/xx heredoc.right && rm -f /tmp/xx
+++ /dev/null
-/* trap.c -- Not the trap command, but useful functions for manipulating
- those objects. The trap command is in builtins/trap.def. */
-
-/* Copyright (C) 1987-2011 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include "bashtypes.h"
-#include "bashansi.h"
-
-#include <stdio.h>
-#include <errno.h>
-
-#include "bashintl.h"
-
-#include "trap.h"
-
-#include "shell.h"
-#include "flags.h"
-#include "input.h" /* for save_token_state, restore_token_state */
-#include "jobs.h"
-#include "signames.h"
-#include "builtins.h"
-#include "builtins/common.h"
-#include "builtins/builtext.h"
-
-#ifndef errno
-extern int errno;
-#endif
-
-/* Flags which describe the current handling state of a signal. */
-#define SIG_INHERITED 0x0 /* Value inherited from parent. */
-#define SIG_TRAPPED 0x1 /* Currently trapped. */
-#define SIG_HARD_IGNORE 0x2 /* Signal was ignored on shell entry. */
-#define SIG_SPECIAL 0x4 /* Treat this signal specially. */
-#define SIG_NO_TRAP 0x8 /* Signal cannot be trapped. */
-#define SIG_INPROGRESS 0x10 /* Signal handler currently executing. */
-#define SIG_CHANGED 0x20 /* Trap value changed in trap handler. */
-#define SIG_IGNORED 0x40 /* The signal is currently being ignored. */
-
-#define SPECIAL_TRAP(s) ((s) == EXIT_TRAP || (s) == DEBUG_TRAP || (s) == ERROR_TRAP || (s) == RETURN_TRAP)
-
-/* An array of such flags, one for each signal, describing what the
- shell will do with a signal. DEBUG_TRAP == NSIG; some code below
- assumes this. */
-static int sigmodes[BASH_NSIG];
-
-static void free_trap_command __P((int));
-static void change_signal __P((int, char *));
-
-static void get_original_signal __P((int));
-
-static int _run_trap_internal __P((int, char *));
-
-static void free_trap_string __P((int));
-static void reset_signal __P((int));
-static void restore_signal __P((int));
-static void reset_or_restore_signal_handlers __P((sh_resetsig_func_t *));
-
-/* Variables used here but defined in other files. */
-extern int last_command_exit_value;
-extern int line_number;
-
-extern char *this_command_name;
-extern sh_builtin_func_t *this_shell_builtin;
-extern procenv_t wait_intr_buf;
-extern int return_catch_flag, return_catch_value;
-extern int subshell_level;
-extern WORD_LIST *subst_assign_varlist;
-
-/* The list of things to do originally, before we started trapping. */
-SigHandler *original_signals[NSIG];
-
-/* For each signal, a slot for a string, which is a command to be
- executed when that signal is recieved. The slot can also contain
- DEFAULT_SIG, which means do whatever you were going to do before
- you were so rudely interrupted, or IGNORE_SIG, which says ignore
- this signal. */
-char *trap_list[BASH_NSIG];
-
-/* A bitmap of signals received for which we have trap handlers. */
-int pending_traps[NSIG];
-
-/* Set to the number of the signal we're running the trap for + 1.
- Used in execute_cmd.c and builtins/common.c to clean up when
- parse_and_execute does not return normally after executing the
- trap command (e.g., when `return' is executed in the trap command). */
-int running_trap;
-
-/* Set to last_command_exit_value before running a trap. */
-int trap_saved_exit_value;
-
-/* The (trapped) signal received while executing in the `wait' builtin */
-int wait_signal_received;
-
-#define GETORIGSIG(sig) \
- do { \
- original_signals[sig] = (SigHandler *)set_signal_handler (sig, SIG_DFL); \
- set_signal_handler (sig, original_signals[sig]); \
- if (original_signals[sig] == SIG_IGN) \
- sigmodes[sig] |= SIG_HARD_IGNORE; \
- } while (0)
-
-#define SETORIGSIG(sig,handler) \
- do { \
- original_signals[sig] = handler; \
- if (original_signals[sig] == SIG_IGN) \
- sigmodes[sig] |= SIG_HARD_IGNORE; \
- } while (0)
-
-#define GET_ORIGINAL_SIGNAL(sig) \
- if (sig && sig < NSIG && original_signals[sig] == IMPOSSIBLE_TRAP_HANDLER) \
- GETORIGSIG(sig)
-
-void
-initialize_traps ()
-{
- register int i;
-
- initialize_signames();
-
- trap_list[EXIT_TRAP] = trap_list[DEBUG_TRAP] = trap_list[ERROR_TRAP] = trap_list[RETURN_TRAP] = (char *)NULL;
- sigmodes[EXIT_TRAP] = sigmodes[DEBUG_TRAP] = sigmodes[ERROR_TRAP] = sigmodes[RETURN_TRAP] = SIG_INHERITED;
- original_signals[EXIT_TRAP] = IMPOSSIBLE_TRAP_HANDLER;
-
- for (i = 1; i < NSIG; i++)
- {
- pending_traps[i] = 0;
- trap_list[i] = (char *)DEFAULT_SIG;
- sigmodes[i] = SIG_INHERITED; /* XXX - only set, not used */
- original_signals[i] = IMPOSSIBLE_TRAP_HANDLER;
- }
-
- /* Show which signals are treated specially by the shell. */
-#if defined (SIGCHLD)
- GETORIGSIG (SIGCHLD);
- sigmodes[SIGCHLD] |= (SIG_SPECIAL | SIG_NO_TRAP);
-#endif /* SIGCHLD */
-
- GETORIGSIG (SIGINT);
- sigmodes[SIGINT] |= SIG_SPECIAL;
-
-#if defined (__BEOS__)
- /* BeOS sets SIGINT to SIG_IGN! */
- original_signals[SIGINT] = SIG_DFL;
- sigmodes[SIGINT] &= ~SIG_HARD_IGNORE;
-#endif
-
- GETORIGSIG (SIGQUIT);
- sigmodes[SIGQUIT] |= SIG_SPECIAL;
-
- if (interactive)
- {
- GETORIGSIG (SIGTERM);
- sigmodes[SIGTERM] |= SIG_SPECIAL;
- }
-}
-
-#ifdef DEBUG
-/* Return a printable representation of the trap handler for SIG. */
-static char *
-trap_handler_string (sig)
- int sig;
-{
- if (trap_list[sig] == (char *)DEFAULT_SIG)
- return "DEFAULT_SIG";
- else if (trap_list[sig] == (char *)IGNORE_SIG)
- return "IGNORE_SIG";
- else if (trap_list[sig] == (char *)IMPOSSIBLE_TRAP_HANDLER)
- return "IMPOSSIBLE_TRAP_HANDLER";
- else if (trap_list[sig])
- return trap_list[sig];
- else
- return "NULL";
-}
-#endif
-
-/* Return the print name of this signal. */
-char *
-signal_name (sig)
- int sig;
-{
- char *ret;
-
- /* on cygwin32, signal_names[sig] could be null */
- ret = (sig >= BASH_NSIG || sig < 0 || signal_names[sig] == NULL)
- ? _("invalid signal number")
- : signal_names[sig];
-
- return ret;
-}
-
-/* Turn a string into a signal number, or a number into
- a signal number. If STRING is "2", "SIGINT", or "INT",
- then (int)2 is returned. Return NO_SIG if STRING doesn't
- contain a valid signal descriptor. */
-int
-decode_signal (string, flags)
- char *string;
- int flags;
-{
- intmax_t sig;
- char *name;
-
- if (legal_number (string, &sig))
- return ((sig >= 0 && sig < NSIG) ? (int)sig : NO_SIG);
-
- /* A leading `SIG' may be omitted. */
- for (sig = 0; sig < BASH_NSIG; sig++)
- {
- name = signal_names[sig];
- if (name == 0 || name[0] == '\0')
- continue;
-
- /* Check name without the SIG prefix first case sensitivly or
- insensitively depending on whether flags includes DSIG_NOCASE */
- if (STREQN (name, "SIG", 3))
- {
- name += 3;
-
- if ((flags & DSIG_NOCASE) && strcasecmp (string, name) == 0)
- return ((int)sig);
- else if ((flags & DSIG_NOCASE) == 0 && strcmp (string, name) == 0)
- return ((int)sig);
- /* If we can't use the `SIG' prefix to match, punt on this
- name now. */
- else if ((flags & DSIG_SIGPREFIX) == 0)
- continue;
- }
-
- /* Check name with SIG prefix case sensitively or insensitively
- depending on whether flags includes DSIG_NOCASE */
- name = signal_names[sig];
- if ((flags & DSIG_NOCASE) && strcasecmp (string, name) == 0)
- return ((int)sig);
- else if ((flags & DSIG_NOCASE) == 0 && strcmp (string, name) == 0)
- return ((int)sig);
- }
-
- return (NO_SIG);
-}
-
-/* Non-zero when we catch a trapped signal. */
-static int catch_flag;
-
-void
-run_pending_traps ()
-{
- register int sig;
- int old_exit_value, *token_state;
- WORD_LIST *save_subst_varlist;
-#if defined (ARRAY_VARS)
- ARRAY *ps;
-#endif
-
- if (catch_flag == 0) /* simple optimization */
- return;
-
-itrace("run_pending_traps: ");
-
- catch_flag = 0;
-
- /* Preserve $? when running trap. */
- old_exit_value = last_command_exit_value;
-#if defined (ARRAY_VARS)
- ps = save_pipestatus_array ();
-#endif
-
- for (sig = 1; sig < NSIG; sig++)
- {
- /* XXX this could be made into a counter by using
- while (pending_traps[sig]--) instead of the if statement. */
- if (pending_traps[sig])
- {
-#if defined (HAVE_POSIX_SIGNALS)
- sigset_t set, oset;
-
- sigemptyset (&set);
- sigemptyset (&oset);
-
- sigaddset (&set, sig);
- sigprocmask (SIG_BLOCK, &set, &oset);
-#else
-# if defined (HAVE_BSD_SIGNALS)
- int oldmask = sigblock (sigmask (sig));
-# endif
-#endif /* HAVE_POSIX_SIGNALS */
-
- if (sig == SIGINT)
- {
- run_interrupt_trap ();
- CLRINTERRUPT;
- }
-#if defined (JOB_CONTROL) && defined (SIGCHLD)
- else if (sig == SIGCHLD &&
- trap_list[SIGCHLD] != (char *)IMPOSSIBLE_TRAP_HANDLER &&
- (sigmodes[SIGCHLD] & SIG_INPROGRESS) == 0)
- {
- run_sigchld_trap (pending_traps[sig]); /* use as counter */
- }
-#endif
- else if (trap_list[sig] == (char *)DEFAULT_SIG ||
- trap_list[sig] == (char *)IGNORE_SIG ||
- trap_list[sig] == (char *)IMPOSSIBLE_TRAP_HANDLER)
- {
- /* This is possible due to a race condition. Say a bash
- process has SIGTERM trapped. A subshell is spawned
- using { list; } & and the parent does something and kills
- the subshell with SIGTERM. It's possible for the subshell
- to set pending_traps[SIGTERM] to 1 before the code in
- execute_cmd.c eventually calls restore_original_signals
- to reset the SIGTERM signal handler in the subshell. The
- next time run_pending_traps is called, pending_traps[SIGTERM]
- will be 1, but the trap handler in trap_list[SIGTERM] will
- be invalid (probably DEFAULT_SIG, but it could be IGNORE_SIG).
- Unless we catch this, the subshell will dump core when
- trap_list[SIGTERM] == DEFAULT_SIG, because DEFAULT_SIG is
- usually 0x0. */
- internal_warning (_("run_pending_traps: bad value in trap_list[%d]: %p"),
- sig, trap_list[sig]);
- if (trap_list[sig] == (char *)DEFAULT_SIG)
- {
- internal_warning (_("run_pending_traps: signal handler is SIG_DFL, resending %d (%s) to myself"), sig, signal_name (sig));
- kill (getpid (), sig);
- }
- }
- else
- {
- token_state = save_token_state ();
- save_subst_varlist = subst_assign_varlist;
- subst_assign_varlist = 0;
-
- parse_and_execute (savestring (trap_list[sig]), "trap", SEVAL_NONINT|SEVAL_NOHIST|SEVAL_RESETLINE);
- restore_token_state (token_state);
- free (token_state);
-
- subst_assign_varlist = save_subst_varlist;
- }
-
- pending_traps[sig] = 0;
-
-#if defined (HAVE_POSIX_SIGNALS)
- sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL);
-#else
-# if defined (HAVE_BSD_SIGNALS)
- sigsetmask (oldmask);
-# endif
-#endif /* POSIX_VERSION */
- }
- }
-
-#if defined (ARRAY_VARS)
- restore_pipestatus_array (ps);
-#endif
- last_command_exit_value = old_exit_value;
-}
-
-sighandler
-trap_handler (sig)
- int sig;
-{
- int oerrno;
-
- if ((sigmodes[sig] & SIG_TRAPPED) == 0)
- {
-#if defined (DEBUG)
- internal_warning ("trap_handler: signal %d: signal not trapped", sig);
-#endif
- SIGRETURN (0);
- }
-
- if ((sig >= NSIG) ||
- (trap_list[sig] == (char *)DEFAULT_SIG) ||
- (trap_list[sig] == (char *)IGNORE_SIG))
- programming_error (_("trap_handler: bad signal %d"), sig);
- else
- {
- oerrno = errno;
-#if defined (MUST_REINSTALL_SIGHANDLERS)
-# if defined (JOB_CONTROL) && defined (SIGCHLD)
- if (sig != SIGCHLD)
-# endif /* JOB_CONTROL && SIGCHLD */
- set_signal_handler (sig, trap_handler);
-#endif /* MUST_REINSTALL_SIGHANDLERS */
-
- catch_flag = 1;
- pending_traps[sig]++;
-
- if (interrupt_immediately && this_shell_builtin && (this_shell_builtin == wait_builtin))
- {
- wait_signal_received = sig;
- longjmp (wait_intr_buf, 1);
- }
-
- if (interrupt_immediately)
- run_pending_traps ();
-
- errno = oerrno;
- }
-
- SIGRETURN (0);
-}
-
-#if defined (JOB_CONTROL) && defined (SIGCHLD)
-
-#ifdef INCLUDE_UNUSED
-/* Make COMMAND_STRING be executed when SIGCHLD is caught. */
-void
-set_sigchld_trap (command_string)
- char *command_string;
-{
- set_signal (SIGCHLD, command_string);
-}
-#endif
-
-/* Make COMMAND_STRING be executed when SIGCHLD is caught iff SIGCHLD
- is not already trapped. IMPOSSIBLE_TRAP_HANDLER is used as a sentinel
- to make sure that a SIGCHLD trap handler run via run_sigchld_trap can
- reset the disposition to the default and not have the original signal
- accidentally restored, undoing the user's command. */
-void
-maybe_set_sigchld_trap (command_string)
- char *command_string;
-{
- if ((sigmodes[SIGCHLD] & SIG_TRAPPED) == 0 && trap_list[SIGCHLD] == (char *)IMPOSSIBLE_TRAP_HANDLER)
- set_signal (SIGCHLD, command_string);
-}
-
-/* Temporarily set the SIGCHLD trap string to IMPOSSIBLE_TRAP_HANDLER. Used
- as a sentinel in run_sigchld_trap and maybe_set_sigchld_trap to see whether
- or not a SIGCHLD trap handler reset SIGCHLD disposition to the default. */
-void
-set_impossible_sigchld_trap ()
-{
- restore_default_signal (SIGCHLD);
- change_signal (SIGCHLD, (char *)IMPOSSIBLE_TRAP_HANDLER);
- sigmodes[SIGCHLD] &= ~SIG_TRAPPED; /* maybe_set_sigchld_trap checks this */
-}
-#endif /* JOB_CONTROL && SIGCHLD */
-
-void
-set_debug_trap (command)
- char *command;
-{
- set_signal (DEBUG_TRAP, command);
-}
-
-void
-set_error_trap (command)
- char *command;
-{
- set_signal (ERROR_TRAP, command);
-}
-
-void
-set_return_trap (command)
- char *command;
-{
- set_signal (RETURN_TRAP, command);
-}
-
-#ifdef INCLUDE_UNUSED
-void
-set_sigint_trap (command)
- char *command;
-{
- set_signal (SIGINT, command);
-}
-#endif
-
-/* Reset the SIGINT handler so that subshells that are doing `shellsy'
- things, like waiting for command substitution or executing commands
- in explicit subshells ( ( cmd ) ), can catch interrupts properly. */
-SigHandler *
-set_sigint_handler ()
-{
- if (sigmodes[SIGINT] & SIG_HARD_IGNORE)
- return ((SigHandler *)SIG_IGN);
-
- else if (sigmodes[SIGINT] & SIG_IGNORED)
- return ((SigHandler *)set_signal_handler (SIGINT, SIG_IGN)); /* XXX */
-
- else if (sigmodes[SIGINT] & SIG_TRAPPED)
- return ((SigHandler *)set_signal_handler (SIGINT, trap_handler));
-
- /* The signal is not trapped, so set the handler to the shell's special
- interrupt handler. */
- else if (interactive) /* XXX - was interactive_shell */
- return (set_signal_handler (SIGINT, sigint_sighandler));
- else
- return (set_signal_handler (SIGINT, termsig_sighandler));
-}
-
-/* Return the correct handler for signal SIG according to the values in
- sigmodes[SIG]. */
-SigHandler *
-trap_to_sighandler (sig)
- int sig;
-{
- if (sigmodes[sig] & (SIG_IGNORED|SIG_HARD_IGNORE))
- return (SIG_IGN);
- else if (sigmodes[sig] & SIG_TRAPPED)
- return (trap_handler);
- else
- return (SIG_DFL);
-}
-
-/* Set SIG to call STRING as a command. */
-void
-set_signal (sig, string)
- int sig;
- char *string;
-{
- if (SPECIAL_TRAP (sig))
- {
- change_signal (sig, savestring (string));
- if (sig == EXIT_TRAP && interactive == 0)
- initialize_terminating_signals ();
- return;
- }
-
- /* A signal ignored on entry to the shell cannot be trapped or reset, but
- no error is reported when attempting to do so. -- Posix.2 */
- if (sigmodes[sig] & SIG_HARD_IGNORE)
- return;
-
- /* Make sure we have original_signals[sig] if the signal has not yet
- been trapped. */
- if ((sigmodes[sig] & SIG_TRAPPED) == 0)
- {
- /* If we aren't sure of the original value, check it. */
- if (original_signals[sig] == IMPOSSIBLE_TRAP_HANDLER)
- GETORIGSIG (sig);
- if (original_signals[sig] == SIG_IGN)
- return;
- }
-
- /* Only change the system signal handler if SIG_NO_TRAP is not set.
- The trap command string is changed in either case. The shell signal
- handlers for SIGINT and SIGCHLD run the user specified traps in an
- environment in which it is safe to do so. */
- if ((sigmodes[sig] & SIG_NO_TRAP) == 0)
- {
- set_signal_handler (sig, SIG_IGN);
- change_signal (sig, savestring (string));
- set_signal_handler (sig, trap_handler);
- }
- else
- change_signal (sig, savestring (string));
-}
-
-static void
-free_trap_command (sig)
- int sig;
-{
- if ((sigmodes[sig] & SIG_TRAPPED) && trap_list[sig] &&
- (trap_list[sig] != (char *)IGNORE_SIG) &&
- (trap_list[sig] != (char *)DEFAULT_SIG) &&
- (trap_list[sig] != (char *)IMPOSSIBLE_TRAP_HANDLER))
- free (trap_list[sig]);
-}
-
-/* If SIG has a string assigned to it, get rid of it. Then give it
- VALUE. */
-static void
-change_signal (sig, value)
- int sig;
- char *value;
-{
- if ((sigmodes[sig] & SIG_INPROGRESS) == 0)
- free_trap_command (sig);
- trap_list[sig] = value;
-
- sigmodes[sig] |= SIG_TRAPPED;
- if (value == (char *)IGNORE_SIG)
- sigmodes[sig] |= SIG_IGNORED;
- else
- sigmodes[sig] &= ~SIG_IGNORED;
- if (sigmodes[sig] & SIG_INPROGRESS)
- sigmodes[sig] |= SIG_CHANGED;
-}
-
-static void
-get_original_signal (sig)
- int sig;
-{
- /* If we aren't sure the of the original value, then get it. */
- if (sig > 0 && sig < NSIG && original_signals[sig] == (SigHandler *)IMPOSSIBLE_TRAP_HANDLER)
- GETORIGSIG (sig);
-}
-
-void
-get_all_original_signals ()
-{
- register int i;
-
- for (i = 1; i < NSIG; i++)
- GET_ORIGINAL_SIGNAL (i);
-}
-
-void
-set_original_signal (sig, handler)
- int sig;
- SigHandler *handler;
-{
- if (sig > 0 && sig < NSIG && original_signals[sig] == (SigHandler *)IMPOSSIBLE_TRAP_HANDLER)
- SETORIGSIG (sig, handler);
-}
-
-/* Restore the default action for SIG; i.e., the action the shell
- would have taken before you used the trap command. This is called
- from trap_builtin (), which takes care to restore the handlers for
- the signals the shell treats specially. */
-void
-restore_default_signal (sig)
- int sig;
-{
- if (SPECIAL_TRAP (sig))
- {
- if ((sig != DEBUG_TRAP && sig != ERROR_TRAP && sig != RETURN_TRAP) ||
- (sigmodes[sig] & SIG_INPROGRESS) == 0)
- free_trap_command (sig);
- trap_list[sig] = (char *)NULL;
- sigmodes[sig] &= ~SIG_TRAPPED;
- if (sigmodes[sig] & SIG_INPROGRESS)
- sigmodes[sig] |= SIG_CHANGED;
- return;
- }
-
- GET_ORIGINAL_SIGNAL (sig);
-
- /* A signal ignored on entry to the shell cannot be trapped or reset, but
- no error is reported when attempting to do so. Thanks Posix.2. */
- if (sigmodes[sig] & SIG_HARD_IGNORE)
- return;
-
- /* If we aren't trapping this signal, don't bother doing anything else. */
- if ((sigmodes[sig] & SIG_TRAPPED) == 0)
- return;
-
- /* Only change the signal handler for SIG if it allows it. */
- if ((sigmodes[sig] & SIG_NO_TRAP) == 0)
- set_signal_handler (sig, original_signals[sig]);
-
- /* Change the trap command in either case. */
- change_signal (sig, (char *)DEFAULT_SIG);
-
- /* Mark the signal as no longer trapped. */
- sigmodes[sig] &= ~SIG_TRAPPED;
-}
-
-/* Make this signal be ignored. */
-void
-ignore_signal (sig)
- int sig;
-{
- if (SPECIAL_TRAP (sig) && ((sigmodes[sig] & SIG_IGNORED) == 0))
- {
- change_signal (sig, (char *)IGNORE_SIG);
- return;
- }
-
- GET_ORIGINAL_SIGNAL (sig);
-
- /* A signal ignored on entry to the shell cannot be trapped or reset.
- No error is reported when the user attempts to do so. */
- if (sigmodes[sig] & SIG_HARD_IGNORE)
- return;
-
- /* If already trapped and ignored, no change necessary. */
- if (sigmodes[sig] & SIG_IGNORED)
- return;
-
- /* Only change the signal handler for SIG if it allows it. */
- if ((sigmodes[sig] & SIG_NO_TRAP) == 0)
- set_signal_handler (sig, SIG_IGN);
-
- /* Change the trap command in either case. */
- change_signal (sig, (char *)IGNORE_SIG);
-}
-
-/* Handle the calling of "trap 0". The only sticky situation is when
- the command to be executed includes an "exit". This is why we have
- to provide our own place for top_level to jump to. */
-int
-run_exit_trap ()
-{
- char *trap_command;
- int code, function_code, retval;
-#if defined (ARRAY_VARS)
- ARRAY *ps;
-#endif
-
- trap_saved_exit_value = last_command_exit_value;
-#if defined (ARRAY_VARS)
- ps = save_pipestatus_array ();
-#endif
- function_code = 0;
-
- /* Run the trap only if signal 0 is trapped and not ignored, and we are not
- currently running in the trap handler (call to exit in the list of
- commands given to trap 0). */
- if ((sigmodes[EXIT_TRAP] & SIG_TRAPPED) &&
- (sigmodes[EXIT_TRAP] & (SIG_IGNORED|SIG_INPROGRESS)) == 0)
- {
- trap_command = savestring (trap_list[EXIT_TRAP]);
- sigmodes[EXIT_TRAP] &= ~SIG_TRAPPED;
- sigmodes[EXIT_TRAP] |= SIG_INPROGRESS;
-
- retval = trap_saved_exit_value;
- running_trap = 1;
-
- code = setjmp (top_level);
-
- /* If we're in a function, make sure return longjmps come here, too. */
- if (return_catch_flag)
- function_code = setjmp (return_catch);
-
- if (code == 0 && function_code == 0)
- {
- reset_parser ();
- parse_and_execute (trap_command, "exit trap", SEVAL_NONINT|SEVAL_NOHIST|SEVAL_RESETLINE);
- }
- else if (code == ERREXIT)
- retval = last_command_exit_value;
- else if (code == EXITPROG)
- retval = last_command_exit_value;
- else if (function_code != 0)
- retval = return_catch_value;
- else
- retval = trap_saved_exit_value;
-
- running_trap = 0;
- return retval;
- }
-
-#if defined (ARRAY_VARS)
- restore_pipestatus_array (ps);
-#endif
- return (trap_saved_exit_value);
-}
-
-void
-run_trap_cleanup (sig)
- int sig;
-{
- sigmodes[sig] &= ~(SIG_INPROGRESS|SIG_CHANGED);
-}
-
-/* Run a trap command for SIG. SIG is one of the signals the shell treats
- specially. Returns the exit status of the executed trap command list. */
-static int
-_run_trap_internal (sig, tag)
- int sig;
- char *tag;
-{
- char *trap_command, *old_trap;
- int trap_exit_value, *token_state;
- int save_return_catch_flag, function_code, flags;
- procenv_t save_return_catch;
- WORD_LIST *save_subst_varlist;
-#if defined (ARRAY_VARS)
- ARRAY *ps;
-#endif
-
- trap_exit_value = function_code = 0;
- /* Run the trap only if SIG is trapped and not ignored, and we are not
- currently executing in the trap handler. */
- if ((sigmodes[sig] & SIG_TRAPPED) && ((sigmodes[sig] & SIG_IGNORED) == 0) &&
- (trap_list[sig] != (char *)IMPOSSIBLE_TRAP_HANDLER) &&
- ((sigmodes[sig] & SIG_INPROGRESS) == 0))
- {
- old_trap = trap_list[sig];
- sigmodes[sig] |= SIG_INPROGRESS;
- sigmodes[sig] &= ~SIG_CHANGED; /* just to be sure */
- trap_command = savestring (old_trap);
-
- running_trap = sig + 1;
- trap_saved_exit_value = last_command_exit_value;
-#if defined (ARRAY_VARS)
- ps = save_pipestatus_array ();
-#endif
-
- token_state = save_token_state ();
- save_subst_varlist = subst_assign_varlist;
- subst_assign_varlist = 0;
-
- /* If we're in a function, make sure return longjmps come here, too. */
- save_return_catch_flag = return_catch_flag;
- if (return_catch_flag)
- {
- COPY_PROCENV (return_catch, save_return_catch);
- function_code = setjmp (return_catch);
- }
-
- flags = SEVAL_NONINT|SEVAL_NOHIST;
- if (sig != DEBUG_TRAP && sig != RETURN_TRAP && sig != ERROR_TRAP)
- flags |= SEVAL_RESETLINE;
- if (function_code == 0)
- parse_and_execute (trap_command, tag, flags);
-
- restore_token_state (token_state);
- free (token_state);
-
- subst_assign_varlist = save_subst_varlist;
-
- trap_exit_value = last_command_exit_value;
- last_command_exit_value = trap_saved_exit_value;
-#if defined (ARRAY_VARS)
- restore_pipestatus_array (ps);
-#endif
- running_trap = 0;
-
- sigmodes[sig] &= ~SIG_INPROGRESS;
-
- if (sigmodes[sig] & SIG_CHANGED)
- {
-#if 0
- /* Special traps like EXIT, DEBUG, RETURN are handled explicitly in
- the places where they can be changed using unwind-protects. For
- example, look at execute_cmd.c:execute_function(). */
- if (SPECIAL_TRAP (sig) == 0)
-#endif
- free (old_trap);
- sigmodes[sig] &= ~SIG_CHANGED;
- }
-
- if (save_return_catch_flag)
- {
- return_catch_flag = save_return_catch_flag;
- return_catch_value = trap_exit_value;
- COPY_PROCENV (save_return_catch, return_catch);
- if (function_code)
- longjmp (return_catch, 1);
- }
- }
-
- return trap_exit_value;
-}
-
-int
-run_debug_trap ()
-{
- int trap_exit_value;
- pid_t save_pgrp;
- int save_pipe[2];
-
- /* XXX - question: should the DEBUG trap inherit the RETURN trap? */
- trap_exit_value = 0;
- if ((sigmodes[DEBUG_TRAP] & SIG_TRAPPED) && ((sigmodes[DEBUG_TRAP] & SIG_IGNORED) == 0) && ((sigmodes[DEBUG_TRAP] & SIG_INPROGRESS) == 0))
- {
-#if defined (JOB_CONTROL)
- save_pgrp = pipeline_pgrp;
- pipeline_pgrp = 0;
- save_pipeline (1);
-# if defined (PGRP_PIPE)
- save_pgrp_pipe (save_pipe, 1);
-# endif
- stop_making_children ();
-#endif
-
- trap_exit_value = _run_trap_internal (DEBUG_TRAP, "debug trap");
-
-#if defined (JOB_CONTROL)
- pipeline_pgrp = save_pgrp;
- restore_pipeline (1);
-# if defined (PGRP_PIPE)
- close_pgrp_pipe ();
- restore_pgrp_pipe (save_pipe);
-# endif
- if (pipeline_pgrp > 0)
- give_terminal_to (pipeline_pgrp, 1);
- notify_and_cleanup ();
-#endif
-
-#if defined (DEBUGGER)
- /* If we're in the debugger and the DEBUG trap returns 2 while we're in
- a function or sourced script, we force a `return'. */
- if (debugging_mode && trap_exit_value == 2 && return_catch_flag)
- {
- return_catch_value = trap_exit_value;
- longjmp (return_catch, 1);
- }
-#endif
- }
- return trap_exit_value;
-}
-
-void
-run_error_trap ()
-{
- if ((sigmodes[ERROR_TRAP] & SIG_TRAPPED) && ((sigmodes[ERROR_TRAP] & SIG_IGNORED) == 0) && (sigmodes[ERROR_TRAP] & SIG_INPROGRESS) == 0)
- _run_trap_internal (ERROR_TRAP, "error trap");
-}
-
-void
-run_return_trap ()
-{
- int old_exit_value;
-
-#if 0
- if ((sigmodes[DEBUG_TRAP] & SIG_TRAPPED) && (sigmodes[DEBUG_TRAP] & SIG_INPROGRESS))
- return;
-#endif
-
- if ((sigmodes[RETURN_TRAP] & SIG_TRAPPED) && ((sigmodes[RETURN_TRAP] & SIG_IGNORED) == 0) && (sigmodes[RETURN_TRAP] & SIG_INPROGRESS) == 0)
- {
- old_exit_value = last_command_exit_value;
- _run_trap_internal (RETURN_TRAP, "return trap");
- last_command_exit_value = old_exit_value;
- }
-}
-
-/* Run a trap set on SIGINT. This is called from throw_to_top_level (), and
- declared here to localize the trap functions. */
-void
-run_interrupt_trap ()
-{
- _run_trap_internal (SIGINT, "interrupt trap");
-}
-
-/* Free all the allocated strings in the list of traps and reset the trap
- values to the default. Intended to be called from subshells that want
- to complete work done by reset_signal_handlers upon execution of a
- subsequent `trap' command that changes a signal's disposition. We need
- to make sure that we duplicate the behavior of
- reset_or_restore_signal_handlers and not change the disposition of signals
- that are set to be ignored. */
-void
-free_trap_strings ()
-{
- register int i;
-
- for (i = 0; i < BASH_NSIG; i++)
- {
- if (trap_list[i] != (char *)IGNORE_SIG)
- free_trap_string (i);
- }
- trap_list[DEBUG_TRAP] = trap_list[EXIT_TRAP] = trap_list[ERROR_TRAP] = trap_list[RETURN_TRAP] = (char *)NULL;
-}
-
-/* Free a trap command string associated with SIG without changing signal
- disposition. Intended to be called from free_trap_strings() */
-static void
-free_trap_string (sig)
- int sig;
-{
- change_signal (sig, (char *)DEFAULT_SIG);
- sigmodes[sig] &= ~SIG_TRAPPED;
-}
-
-/* Reset the handler for SIG to the original value but leave the trap string
- in place. */
-static void
-reset_signal (sig)
- int sig;
-{
- set_signal_handler (sig, original_signals[sig]);
- sigmodes[sig] &= ~SIG_TRAPPED;
-}
-
-/* Set the handler signal SIG to the original and free any trap
- command associated with it. */
-static void
-restore_signal (sig)
- int sig;
-{
- set_signal_handler (sig, original_signals[sig]);
- change_signal (sig, (char *)DEFAULT_SIG);
- sigmodes[sig] &= ~SIG_TRAPPED;
-}
-
-static void
-reset_or_restore_signal_handlers (reset)
- sh_resetsig_func_t *reset;
-{
- register int i;
-
- /* Take care of the exit trap first */
- if (sigmodes[EXIT_TRAP] & SIG_TRAPPED)
- {
- sigmodes[EXIT_TRAP] &= ~SIG_TRAPPED;
- if (reset != reset_signal)
- {
- free_trap_command (EXIT_TRAP);
- trap_list[EXIT_TRAP] = (char *)NULL;
- }
- }
-
- for (i = 1; i < NSIG; i++)
- {
- if (sigmodes[i] & SIG_TRAPPED)
- {
- if (trap_list[i] == (char *)IGNORE_SIG)
- set_signal_handler (i, SIG_IGN);
- else
- (*reset) (i);
- }
- else if (sigmodes[i] & SIG_SPECIAL)
- (*reset) (i);
- }
-
- /* Command substitution and other child processes don't inherit the
- debug, error, or return traps. If we're in the debugger, and the
- `functrace' or `errtrace' options have been set, then let command
- substitutions inherit them. Let command substitution inherit the
- RETURN trap if we're in the debugger and tracing functions. */
- if (function_trace_mode == 0)
- {
- sigmodes[DEBUG_TRAP] &= ~SIG_TRAPPED;
- sigmodes[RETURN_TRAP] &= ~SIG_TRAPPED;
- }
- if (error_trace_mode == 0)
- sigmodes[ERROR_TRAP] &= ~SIG_TRAPPED;
-}
-
-/* Reset trapped signals to their original values, but don't free the
- trap strings. Called by the command substitution code and other places
- that create a "subshell environment". */
-void
-reset_signal_handlers ()
-{
- reset_or_restore_signal_handlers (reset_signal);
-}
-
-/* Reset all trapped signals to their original values. Signals set to be
- ignored with trap '' SIGNAL should be ignored, so we make sure that they
- are. Called by child processes after they are forked. */
-void
-restore_original_signals ()
-{
- reset_or_restore_signal_handlers (restore_signal);
-}
-
-/* If a trap handler exists for signal SIG, then call it; otherwise just
- return failure. */
-int
-maybe_call_trap_handler (sig)
- int sig;
-{
- /* Call the trap handler for SIG if the signal is trapped and not ignored. */
- if ((sigmodes[sig] & SIG_TRAPPED) && ((sigmodes[sig] & SIG_IGNORED) == 0))
- {
- switch (sig)
- {
- case SIGINT:
- run_interrupt_trap ();
- break;
- case EXIT_TRAP:
- run_exit_trap ();
- break;
- case DEBUG_TRAP:
- run_debug_trap ();
- break;
- case ERROR_TRAP:
- run_error_trap ();
- break;
- default:
- trap_handler (sig);
- break;
- }
- return (1);
- }
- else
- return (0);
-}
-
-int
-signal_is_trapped (sig)
- int sig;
-{
- return (sigmodes[sig] & SIG_TRAPPED);
-}
-
-int
-signal_is_special (sig)
- int sig;
-{
- return (sigmodes[sig] & SIG_SPECIAL);
-}
-
-int
-signal_is_ignored (sig)
- int sig;
-{
- return (sigmodes[sig] & SIG_IGNORED);
-}
-
-int
-signal_is_hard_ignored (sig)
- int sig;
-{
- return (sigmodes[sig] & SIG_HARD_IGNORE);
-}
-
-void
-set_signal_ignored (sig)
- int sig;
-{
- sigmodes[sig] |= SIG_HARD_IGNORE;
- original_signals[sig] = SIG_IGN;
-}
-
-int
-signal_in_progress (sig)
- int sig;
-{
- return (sigmodes[sig] & SIG_INPROGRESS);
-}
+++ /dev/null
-/* variables.c -- Functions for hacking shell variables. */
-
-/* Copyright (C) 1987-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "config.h"
-
-#include "bashtypes.h"
-#include "posixstat.h"
-#include "posixtime.h"
-
-#if defined (__QNX__)
-# if defined (__QNXNTO__)
-# include <sys/netmgr.h>
-# else
-# include <sys/vc.h>
-# endif /* !__QNXNTO__ */
-#endif /* __QNX__ */
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#include <stdio.h>
-#include "chartypes.h"
-#if defined (HAVE_PWD_H)
-# include <pwd.h>
-#endif
-#include "bashansi.h"
-#include "bashintl.h"
-
-#define NEED_XTRACE_SET_DECL
-
-#include "shell.h"
-#include "flags.h"
-#include "execute_cmd.h"
-#include "findcmd.h"
-#include "mailcheck.h"
-#include "input.h"
-#include "hashcmd.h"
-#include "pathexp.h"
-#include "alias.h"
-
-#include "builtins/getopt.h"
-#include "builtins/common.h"
-
-#if defined (READLINE)
-# include "bashline.h"
-# include <readline/readline.h>
-#else
-# include <tilde/tilde.h>
-#endif
-
-#if defined (HISTORY)
-# include "bashhist.h"
-# include <readline/history.h>
-#endif /* HISTORY */
-
-#if defined (PROGRAMMABLE_COMPLETION)
-# include "pcomplete.h"
-#endif
-
-#define TEMPENV_HASH_BUCKETS 4 /* must be power of two */
-
-#define ifsname(s) ((s)[0] == 'I' && (s)[1] == 'F' && (s)[2] == 'S' && (s)[3] == '\0')
-
-extern char **environ;
-
-/* Variables used here and defined in other files. */
-extern int posixly_correct;
-extern int line_number, line_number_base;
-extern int subshell_environment, indirection_level, subshell_level;
-extern int build_version, patch_level;
-extern int expanding_redir;
-extern char *dist_version, *release_status;
-extern char *shell_name;
-extern char *primary_prompt, *secondary_prompt;
-extern char *current_host_name;
-extern sh_builtin_func_t *this_shell_builtin;
-extern SHELL_VAR *this_shell_function;
-extern char *the_printed_command_except_trap;
-extern char *this_command_name;
-extern char *command_execution_string;
-extern time_t shell_start_time;
-extern int assigning_in_environment;
-extern int executing_builtin;
-extern int funcnest_max;
-
-#if defined (READLINE)
-extern int no_line_editing;
-extern int perform_hostname_completion;
-#endif
-
-/* The list of shell variables that the user has created at the global
- scope, or that came from the environment. */
-VAR_CONTEXT *global_variables = (VAR_CONTEXT *)NULL;
-
-/* The current list of shell variables, including function scopes */
-VAR_CONTEXT *shell_variables = (VAR_CONTEXT *)NULL;
-
-/* The list of shell functions that the user has created, or that came from
- the environment. */
-HASH_TABLE *shell_functions = (HASH_TABLE *)NULL;
-
-#if defined (DEBUGGER)
-/* The table of shell function definitions that the user defined or that
- came from the environment. */
-HASH_TABLE *shell_function_defs = (HASH_TABLE *)NULL;
-#endif
-
-/* The current variable context. This is really a count of how deep into
- executing functions we are. */
-int variable_context = 0;
-
-/* The set of shell assignments which are made only in the environment
- for a single command. */
-HASH_TABLE *temporary_env = (HASH_TABLE *)NULL;
-
-/* Set to non-zero if an assignment error occurs while putting variables
- into the temporary environment. */
-int tempenv_assign_error;
-
-/* Some funky variables which are known about specially. Here is where
- "$*", "$1", and all the cruft is kept. */
-char *dollar_vars[10];
-WORD_LIST *rest_of_args = (WORD_LIST *)NULL;
-
-/* The value of $$. */
-pid_t dollar_dollar_pid;
-
-/* Non-zero means that we have to remake EXPORT_ENV. */
-int array_needs_making = 1;
-
-/* The number of times BASH has been executed. This is set
- by initialize_variables (). */
-int shell_level = 0;
-
-/* An array which is passed to commands as their environment. It is
- manufactured from the union of the initial environment and the
- shell variables that are marked for export. */
-char **export_env = (char **)NULL;
-static int export_env_index;
-static int export_env_size;
-
-#if defined (READLINE)
-static int winsize_assignment; /* currently assigning to LINES or COLUMNS */
-#endif
-
-/* Some forward declarations. */
-static void create_variable_tables __P((void));
-
-static void set_machine_vars __P((void));
-static void set_home_var __P((void));
-static void set_shell_var __P((void));
-static char *get_bash_name __P((void));
-static void initialize_shell_level __P((void));
-static void uidset __P((void));
-#if defined (ARRAY_VARS)
-static void make_vers_array __P((void));
-#endif
-
-static SHELL_VAR *null_assign __P((SHELL_VAR *, char *, arrayind_t, char *));
-#if defined (ARRAY_VARS)
-static SHELL_VAR *null_array_assign __P((SHELL_VAR *, char *, arrayind_t, char *));
-#endif
-static SHELL_VAR *get_self __P((SHELL_VAR *));
-
-#if defined (ARRAY_VARS)
-static SHELL_VAR *init_dynamic_array_var __P((char *, sh_var_value_func_t *, sh_var_assign_func_t *, int));
-static SHELL_VAR *init_dynamic_assoc_var __P((char *, sh_var_value_func_t *, sh_var_assign_func_t *, int));
-#endif
-
-static SHELL_VAR *assign_seconds __P((SHELL_VAR *, char *, arrayind_t, char *));
-static SHELL_VAR *get_seconds __P((SHELL_VAR *));
-static SHELL_VAR *init_seconds_var __P((void));
-
-static int brand __P((void));
-static void sbrand __P((unsigned long)); /* set bash random number generator. */
-static void seedrand __P((void)); /* seed generator randomly */
-static SHELL_VAR *assign_random __P((SHELL_VAR *, char *, arrayind_t, char *));
-static SHELL_VAR *get_random __P((SHELL_VAR *));
-
-static SHELL_VAR *assign_lineno __P((SHELL_VAR *, char *, arrayind_t, char *));
-static SHELL_VAR *get_lineno __P((SHELL_VAR *));
-
-static SHELL_VAR *assign_subshell __P((SHELL_VAR *, char *, arrayind_t, char *));
-static SHELL_VAR *get_subshell __P((SHELL_VAR *));
-
-static SHELL_VAR *get_bashpid __P((SHELL_VAR *));
-
-#if defined (HISTORY)
-static SHELL_VAR *get_histcmd __P((SHELL_VAR *));
-#endif
-
-#if defined (READLINE)
-static SHELL_VAR *get_comp_wordbreaks __P((SHELL_VAR *));
-static SHELL_VAR *assign_comp_wordbreaks __P((SHELL_VAR *, char *, arrayind_t, char *));
-#endif
-
-#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
-static SHELL_VAR *assign_dirstack __P((SHELL_VAR *, char *, arrayind_t, char *));
-static SHELL_VAR *get_dirstack __P((SHELL_VAR *));
-#endif
-
-#if defined (ARRAY_VARS)
-static SHELL_VAR *get_groupset __P((SHELL_VAR *));
-
-static SHELL_VAR *build_hashcmd __P((SHELL_VAR *));
-static SHELL_VAR *get_hashcmd __P((SHELL_VAR *));
-static SHELL_VAR *assign_hashcmd __P((SHELL_VAR *, char *, arrayind_t, char *));
-# if defined (ALIAS)
-static SHELL_VAR *build_aliasvar __P((SHELL_VAR *));
-static SHELL_VAR *get_aliasvar __P((SHELL_VAR *));
-static SHELL_VAR *assign_aliasvar __P((SHELL_VAR *, char *, arrayind_t, char *));
-# endif
-#endif
-
-static SHELL_VAR *get_funcname __P((SHELL_VAR *));
-static SHELL_VAR *init_funcname_var __P((void));
-
-static void initialize_dynamic_variables __P((void));
-
-static SHELL_VAR *hash_lookup __P((const char *, HASH_TABLE *));
-static SHELL_VAR *new_shell_variable __P((const char *));
-static SHELL_VAR *make_new_variable __P((const char *, HASH_TABLE *));
-static SHELL_VAR *bind_variable_internal __P((const char *, char *, HASH_TABLE *, int, int));
-
-static void dispose_variable_value __P((SHELL_VAR *));
-static void free_variable_hash_data __P((PTR_T));
-
-static VARLIST *vlist_alloc __P((int));
-static VARLIST *vlist_realloc __P((VARLIST *, int));
-static void vlist_add __P((VARLIST *, SHELL_VAR *, int));
-
-static void flatten __P((HASH_TABLE *, sh_var_map_func_t *, VARLIST *, int));
-
-static int qsort_var_comp __P((SHELL_VAR **, SHELL_VAR **));
-
-static SHELL_VAR **vapply __P((sh_var_map_func_t *));
-static SHELL_VAR **fapply __P((sh_var_map_func_t *));
-
-static int visible_var __P((SHELL_VAR *));
-static int visible_and_exported __P((SHELL_VAR *));
-static int export_environment_candidate __P((SHELL_VAR *));
-static int local_and_exported __P((SHELL_VAR *));
-static int variable_in_context __P((SHELL_VAR *));
-#if defined (ARRAY_VARS)
-static int visible_array_vars __P((SHELL_VAR *));
-#endif
-
-static SHELL_VAR *bind_tempenv_variable __P((const char *, char *));
-static void push_temp_var __P((PTR_T));
-static void propagate_temp_var __P((PTR_T));
-static void dispose_temporary_env __P((sh_free_func_t *));
-
-static inline char *mk_env_string __P((const char *, const char *));
-static char **make_env_array_from_var_list __P((SHELL_VAR **));
-static char **make_var_export_array __P((VAR_CONTEXT *));
-static char **make_func_export_array __P((void));
-static void add_temp_array_to_env __P((char **, int, int));
-
-static int n_shell_variables __P((void));
-static int set_context __P((SHELL_VAR *));
-
-static void push_func_var __P((PTR_T));
-static void push_exported_var __P((PTR_T));
-
-static inline int find_special_var __P((const char *));
-
-static void
-create_variable_tables ()
-{
- if (shell_variables == 0)
- {
- shell_variables = global_variables = new_var_context ((char *)NULL, 0);
- shell_variables->scope = 0;
- shell_variables->table = hash_create (0);
- }
-
- if (shell_functions == 0)
- shell_functions = hash_create (0);
-
-#if defined (DEBUGGER)
- if (shell_function_defs == 0)
- shell_function_defs = hash_create (0);
-#endif
-}
-
-/* Initialize the shell variables from the current environment.
- If PRIVMODE is nonzero, don't import functions from ENV or
- parse $SHELLOPTS. */
-void
-initialize_shell_variables (env, privmode)
- char **env;
- int privmode;
-{
- char *name, *string, *temp_string;
- int c, char_index, string_index, string_length;
- SHELL_VAR *temp_var;
-
- create_variable_tables ();
-
- for (string_index = 0; string = env[string_index++]; )
- {
- char_index = 0;
- name = string;
- while ((c = *string++) && c != '=')
- ;
- if (string[-1] == '=')
- char_index = string - name - 1;
-
- /* If there are weird things in the environment, like `=xxx' or a
- string without an `=', just skip them. */
- if (char_index == 0)
- continue;
-
- /* ASSERT(name[char_index] == '=') */
- name[char_index] = '\0';
- /* Now, name = env variable name, string = env variable value, and
- char_index == strlen (name) */
-
- temp_var = (SHELL_VAR *)NULL;
-
- /* If exported function, define it now. Don't import functions from
- the environment in privileged mode. */
- if (privmode == 0 && read_but_dont_execute == 0 && STREQN ("() {", string, 4))
- {
- string_length = strlen (string);
- temp_string = (char *)xmalloc (3 + string_length + char_index);
-
- strcpy (temp_string, name);
- temp_string[char_index] = ' ';
- strcpy (temp_string + char_index + 1, string);
-
- parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST);
-
- /* Ancient backwards compatibility. Old versions of bash exported
- functions like name()=() {...} */
- if (name[char_index - 1] == ')' && name[char_index - 2] == '(')
- name[char_index - 2] = '\0';
-
- if (temp_var = find_function (name))
- {
- VSETATTR (temp_var, (att_exported|att_imported));
- array_needs_making = 1;
- }
- else
- report_error (_("error importing function definition for `%s'"), name);
-
- /* ( */
- if (name[char_index - 1] == ')' && name[char_index - 2] == '\0')
- name[char_index - 2] = '('; /* ) */
- }
-#if defined (ARRAY_VARS)
-# if 0
- /* Array variables may not yet be exported. */
- else if (*string == '(' && string[1] == '[' && string[strlen (string) - 1] == ')')
- {
- string_length = 1;
- temp_string = extract_array_assignment_list (string, &string_length);
- temp_var = assign_array_from_string (name, temp_string);
- FREE (temp_string);
- VSETATTR (temp_var, (att_exported | att_imported));
- array_needs_making = 1;
- }
-# endif
-#endif
-#if 0
- else if (legal_identifier (name))
-#else
- else
-#endif
- {
- temp_var = bind_variable (name, string, 0);
- if (temp_var)
- {
- if (legal_identifier (name))
- VSETATTR (temp_var, (att_exported | att_imported));
- else
- VSETATTR (temp_var, (att_exported | att_imported | att_invisible));
- array_needs_making = 1;
- }
- }
-
- name[char_index] = '=';
- /* temp_var can be NULL if it was an exported function with a syntax
- error (a different bug, but it still shouldn't dump core). */
- if (temp_var && function_p (temp_var) == 0) /* XXX not yet */
- {
- CACHE_IMPORTSTR (temp_var, name);
- }
- }
-
- set_pwd ();
-
- /* Set up initial value of $_ */
- temp_var = set_if_not ("_", dollar_vars[0]);
-
- /* Remember this pid. */
- dollar_dollar_pid = getpid ();
-
- /* Now make our own defaults in case the vars that we think are
- important are missing. */
- temp_var = set_if_not ("PATH", DEFAULT_PATH_VALUE);
-#if 0
- set_auto_export (temp_var); /* XXX */
-#endif
-
- temp_var = set_if_not ("TERM", "dumb");
-#if 0
- set_auto_export (temp_var); /* XXX */
-#endif
-
-#if defined (__QNX__)
- /* set node id -- don't import it from the environment */
- {
- char node_name[22];
-# if defined (__QNXNTO__)
- netmgr_ndtostr(ND2S_LOCAL_STR, ND_LOCAL_NODE, node_name, sizeof(node_name));
-# else
- qnx_nidtostr (getnid (), node_name, sizeof (node_name));
-# endif
- temp_var = bind_variable ("NODE", node_name, 0);
- set_auto_export (temp_var);
- }
-#endif
-
- /* set up the prompts. */
- if (interactive_shell)
- {
-#if defined (PROMPT_STRING_DECODE)
- set_if_not ("PS1", primary_prompt);
-#else
- if (current_user.uid == -1)
- get_current_user_info ();
- set_if_not ("PS1", current_user.euid == 0 ? "# " : primary_prompt);
-#endif
- set_if_not ("PS2", secondary_prompt);
- }
- set_if_not ("PS4", "+ ");
-
- /* Don't allow IFS to be imported from the environment. */
- temp_var = bind_variable ("IFS", " \t\n", 0);
- setifs (temp_var);
-
- /* Magic machine types. Pretty convenient. */
- set_machine_vars ();
-
- /* Default MAILCHECK for interactive shells. Defer the creation of a
- default MAILPATH until the startup files are read, because MAIL
- names a mail file if MAILPATH is not set, and we should provide a
- default only if neither is set. */
- if (interactive_shell)
- {
- temp_var = set_if_not ("MAILCHECK", posixly_correct ? "600" : "60");
- VSETATTR (temp_var, att_integer);
- }
-
- /* Do some things with shell level. */
- initialize_shell_level ();
-
- set_ppid ();
-
- /* Initialize the `getopts' stuff. */
- temp_var = bind_variable ("OPTIND", "1", 0);
- VSETATTR (temp_var, att_integer);
- getopts_reset (0);
- bind_variable ("OPTERR", "1", 0);
- sh_opterr = 1;
-
- if (login_shell == 1 && posixly_correct == 0)
- set_home_var ();
-
- /* Get the full pathname to THIS shell, and set the BASH variable
- to it. */
- name = get_bash_name ();
- temp_var = bind_variable ("BASH", name, 0);
- free (name);
-
- /* Make the exported environment variable SHELL be the user's login
- shell. Note that the `tset' command looks at this variable
- to determine what style of commands to output; if it ends in "csh",
- then C-shell commands are output, else Bourne shell commands. */
- set_shell_var ();
-
- /* Make a variable called BASH_VERSION which contains the version info. */
- bind_variable ("BASH_VERSION", shell_version_string (), 0);
-#if defined (ARRAY_VARS)
- make_vers_array ();
-#endif
-
- if (command_execution_string)
- bind_variable ("BASH_EXECUTION_STRING", command_execution_string, 0);
-
- /* Find out if we're supposed to be in Posix.2 mode via an
- environment variable. */
- temp_var = find_variable ("POSIXLY_CORRECT");
- if (!temp_var)
- temp_var = find_variable ("POSIX_PEDANTIC");
- if (temp_var && imported_p (temp_var))
- sv_strict_posix (temp_var->name);
-
-#if defined (HISTORY)
- /* Set history variables to defaults, and then do whatever we would
- do if the variable had just been set. Do this only in the case
- that we are remembering commands on the history list. */
- if (remember_on_history)
- {
- name = bash_tilde_expand (posixly_correct ? "~/.sh_history" : "~/.bash_history", 0);
-
- set_if_not ("HISTFILE", name);
- free (name);
-
-#if 0
- set_if_not ("HISTSIZE", "500");
- sv_histsize ("HISTSIZE");
-#endif
- }
-#endif /* HISTORY */
-
- /* Seed the random number generator. */
- seedrand ();
-
- /* Handle some "special" variables that we may have inherited from a
- parent shell. */
- if (interactive_shell)
- {
- temp_var = find_variable ("IGNOREEOF");
- if (!temp_var)
- temp_var = find_variable ("ignoreeof");
- if (temp_var && imported_p (temp_var))
- sv_ignoreeof (temp_var->name);
- }
-
-#if defined (HISTORY)
- if (interactive_shell && remember_on_history)
- {
- sv_history_control ("HISTCONTROL");
- sv_histignore ("HISTIGNORE");
- sv_histtimefmt ("HISTTIMEFORMAT");
- }
-#endif /* HISTORY */
-
-#if defined (READLINE) && defined (STRICT_POSIX)
- /* POSIXLY_CORRECT will only be 1 here if the shell was compiled
- -DSTRICT_POSIX */
- if (interactive_shell && posixly_correct && no_line_editing == 0)
- rl_prefer_env_winsize = 1;
-#endif /* READLINE && STRICT_POSIX */
-
- /*
- * 24 October 2001
- *
- * I'm tired of the arguing and bug reports. Bash now leaves SSH_CLIENT
- * and SSH2_CLIENT alone. I'm going to rely on the shell_level check in
- * isnetconn() to avoid running the startup files more often than wanted.
- * That will, of course, only work if the user's login shell is bash, so
- * I've made that behavior conditional on SSH_SOURCE_BASHRC being defined
- * in config-top.h.
- */
-#if 0
- temp_var = find_variable ("SSH_CLIENT");
- if (temp_var && imported_p (temp_var))
- {
- VUNSETATTR (temp_var, att_exported);
- array_needs_making = 1;
- }
- temp_var = find_variable ("SSH2_CLIENT");
- if (temp_var && imported_p (temp_var))
- {
- VUNSETATTR (temp_var, att_exported);
- array_needs_making = 1;
- }
-#endif
-
- /* Get the user's real and effective user ids. */
- uidset ();
-
- temp_var = find_variable ("BASH_XTRACEFD");
- if (temp_var && imported_p (temp_var))
- sv_xtracefd (temp_var->name);
-
- /* Initialize the dynamic variables, and seed their values. */
- initialize_dynamic_variables ();
-}
-
-/* **************************************************************** */
-/* */
-/* Setting values for special shell variables */
-/* */
-/* **************************************************************** */
-
-static void
-set_machine_vars ()
-{
- SHELL_VAR *temp_var;
-
- temp_var = set_if_not ("HOSTTYPE", HOSTTYPE);
- temp_var = set_if_not ("OSTYPE", OSTYPE);
- temp_var = set_if_not ("MACHTYPE", MACHTYPE);
-
- temp_var = set_if_not ("HOSTNAME", current_host_name);
-}
-
-/* Set $HOME to the information in the password file if we didn't get
- it from the environment. */
-
-/* This function is not static so the tilde and readline libraries can
- use it. */
-char *
-sh_get_home_dir ()
-{
- if (current_user.home_dir == 0)
- get_current_user_info ();
- return current_user.home_dir;
-}
-
-static void
-set_home_var ()
-{
- SHELL_VAR *temp_var;
-
- temp_var = find_variable ("HOME");
- if (temp_var == 0)
- temp_var = bind_variable ("HOME", sh_get_home_dir (), 0);
-#if 0
- VSETATTR (temp_var, att_exported);
-#endif
-}
-
-/* Set $SHELL to the user's login shell if it is not already set. Call
- get_current_user_info if we haven't already fetched the shell. */
-static void
-set_shell_var ()
-{
- SHELL_VAR *temp_var;
-
- temp_var = find_variable ("SHELL");
- if (temp_var == 0)
- {
- if (current_user.shell == 0)
- get_current_user_info ();
- temp_var = bind_variable ("SHELL", current_user.shell, 0);
- }
-#if 0
- VSETATTR (temp_var, att_exported);
-#endif
-}
-
-static char *
-get_bash_name ()
-{
- char *name;
-
- if ((login_shell == 1) && RELPATH(shell_name))
- {
- if (current_user.shell == 0)
- get_current_user_info ();
- name = savestring (current_user.shell);
- }
- else if (ABSPATH(shell_name))
- name = savestring (shell_name);
- else if (shell_name[0] == '.' && shell_name[1] == '/')
- {
- /* Fast path for common case. */
- char *cdir;
- int len;
-
- cdir = get_string_value ("PWD");
- if (cdir)
- {
- len = strlen (cdir);
- name = (char *)xmalloc (len + strlen (shell_name) + 1);
- strcpy (name, cdir);
- strcpy (name + len, shell_name + 1);
- }
- else
- name = savestring (shell_name);
- }
- else
- {
- char *tname;
- int s;
-
- tname = find_user_command (shell_name);
-
- if (tname == 0)
- {
- /* Try the current directory. If there is not an executable
- there, just punt and use the login shell. */
- s = file_status (shell_name);
- if (s & FS_EXECABLE)
- {
- tname = make_absolute (shell_name, get_string_value ("PWD"));
- if (*shell_name == '.')
- {
- name = sh_canonpath (tname, PATH_CHECKDOTDOT|PATH_CHECKEXISTS);
- if (name == 0)
- name = tname;
- else
- free (tname);
- }
- else
- name = tname;
- }
- else
- {
- if (current_user.shell == 0)
- get_current_user_info ();
- name = savestring (current_user.shell);
- }
- }
- else
- {
- name = full_pathname (tname);
- free (tname);
- }
- }
-
- return (name);
-}
-
-void
-adjust_shell_level (change)
- int change;
-{
- char new_level[5], *old_SHLVL;
- intmax_t old_level;
- SHELL_VAR *temp_var;
-
- old_SHLVL = get_string_value ("SHLVL");
- if (old_SHLVL == 0 || *old_SHLVL == '\0' || legal_number (old_SHLVL, &old_level) == 0)
- old_level = 0;
-
- shell_level = old_level + change;
- if (shell_level < 0)
- shell_level = 0;
- else if (shell_level > 1000)
- {
- internal_warning (_("shell level (%d) too high, resetting to 1"), shell_level);
- shell_level = 1;
- }
-
- /* We don't need the full generality of itos here. */
- if (shell_level < 10)
- {
- new_level[0] = shell_level + '0';
- new_level[1] = '\0';
- }
- else if (shell_level < 100)
- {
- new_level[0] = (shell_level / 10) + '0';
- new_level[1] = (shell_level % 10) + '0';
- new_level[2] = '\0';
- }
- else if (shell_level < 1000)
- {
- new_level[0] = (shell_level / 100) + '0';
- old_level = shell_level % 100;
- new_level[1] = (old_level / 10) + '0';
- new_level[2] = (old_level % 10) + '0';
- new_level[3] = '\0';
- }
-
- temp_var = bind_variable ("SHLVL", new_level, 0);
- set_auto_export (temp_var);
-}
-
-static void
-initialize_shell_level ()
-{
- adjust_shell_level (1);
-}
-
-/* If we got PWD from the environment, update our idea of the current
- working directory. In any case, make sure that PWD exists before
- checking it. It is possible for getcwd () to fail on shell startup,
- and in that case, PWD would be undefined. If this is an interactive
- login shell, see if $HOME is the current working directory, and if
- that's not the same string as $PWD, set PWD=$HOME. */
-
-void
-set_pwd ()
-{
- SHELL_VAR *temp_var, *home_var;
- char *temp_string, *home_string;
-
- home_var = find_variable ("HOME");
- home_string = home_var ? value_cell (home_var) : (char *)NULL;
-
- temp_var = find_variable ("PWD");
- if (temp_var && imported_p (temp_var) &&
- (temp_string = value_cell (temp_var)) &&
- same_file (temp_string, ".", (struct stat *)NULL, (struct stat *)NULL))
- set_working_directory (temp_string);
- else if (home_string && interactive_shell && login_shell &&
- same_file (home_string, ".", (struct stat *)NULL, (struct stat *)NULL))
- {
- set_working_directory (home_string);
- temp_var = bind_variable ("PWD", home_string, 0);
- set_auto_export (temp_var);
- }
- else
- {
- temp_string = get_working_directory ("shell-init");
- if (temp_string)
- {
- temp_var = bind_variable ("PWD", temp_string, 0);
- set_auto_export (temp_var);
- free (temp_string);
- }
- }
-
- /* According to the Single Unix Specification, v2, $OLDPWD is an
- `environment variable' and therefore should be auto-exported.
- Make a dummy invisible variable for OLDPWD, and mark it as exported. */
- temp_var = bind_variable ("OLDPWD", (char *)NULL, 0);
- VSETATTR (temp_var, (att_exported | att_invisible));
-}
-
-/* Make a variable $PPID, which holds the pid of the shell's parent. */
-void
-set_ppid ()
-{
- char namebuf[INT_STRLEN_BOUND(pid_t) + 1], *name;
- SHELL_VAR *temp_var;
-
- name = inttostr (getppid (), namebuf, sizeof(namebuf));
- temp_var = find_variable ("PPID");
- if (temp_var)
- VUNSETATTR (temp_var, (att_readonly | att_exported));
- temp_var = bind_variable ("PPID", name, 0);
- VSETATTR (temp_var, (att_readonly | att_integer));
-}
-
-static void
-uidset ()
-{
- char buff[INT_STRLEN_BOUND(uid_t) + 1], *b;
- register SHELL_VAR *v;
-
- b = inttostr (current_user.uid, buff, sizeof (buff));
- v = find_variable ("UID");
- if (v == 0)
- {
- v = bind_variable ("UID", b, 0);
- VSETATTR (v, (att_readonly | att_integer));
- }
-
- if (current_user.euid != current_user.uid)
- b = inttostr (current_user.euid, buff, sizeof (buff));
-
- v = find_variable ("EUID");
- if (v == 0)
- {
- v = bind_variable ("EUID", b, 0);
- VSETATTR (v, (att_readonly | att_integer));
- }
-}
-
-#if defined (ARRAY_VARS)
-static void
-make_vers_array ()
-{
- SHELL_VAR *vv;
- ARRAY *av;
- char *s, d[32], b[INT_STRLEN_BOUND(int) + 1];
-
- unbind_variable ("BASH_VERSINFO");
-
- vv = make_new_array_variable ("BASH_VERSINFO");
- av = array_cell (vv);
- strcpy (d, dist_version);
- s = strchr (d, '.');
- if (s)
- *s++ = '\0';
- array_insert (av, 0, d);
- array_insert (av, 1, s);
- s = inttostr (patch_level, b, sizeof (b));
- array_insert (av, 2, s);
- s = inttostr (build_version, b, sizeof (b));
- array_insert (av, 3, s);
- array_insert (av, 4, release_status);
- array_insert (av, 5, MACHTYPE);
-
- VSETATTR (vv, att_readonly);
-}
-#endif /* ARRAY_VARS */
-
-/* Set the environment variables $LINES and $COLUMNS in response to
- a window size change. */
-void
-sh_set_lines_and_columns (lines, cols)
- int lines, cols;
-{
- char val[INT_STRLEN_BOUND(int) + 1], *v;
-
-#if defined (READLINE)
- /* If we are currently assigning to LINES or COLUMNS, don't do anything. */
- if (winsize_assignment)
- return;
-#endif
-
- v = inttostr (lines, val, sizeof (val));
- bind_variable ("LINES", v, 0);
-
- v = inttostr (cols, val, sizeof (val));
- bind_variable ("COLUMNS", v, 0);
-}
-
-/* **************************************************************** */
-/* */
-/* Printing variables and values */
-/* */
-/* **************************************************************** */
-
-/* Print LIST (a list of shell variables) to stdout in such a way that
- they can be read back in. */
-void
-print_var_list (list)
- register SHELL_VAR **list;
-{
- register int i;
- register SHELL_VAR *var;
-
- for (i = 0; list && (var = list[i]); i++)
- if (invisible_p (var) == 0)
- print_assignment (var);
-}
-
-/* Print LIST (a list of shell functions) to stdout in such a way that
- they can be read back in. */
-void
-print_func_list (list)
- register SHELL_VAR **list;
-{
- register int i;
- register SHELL_VAR *var;
-
- for (i = 0; list && (var = list[i]); i++)
- {
- printf ("%s ", var->name);
- print_var_function (var);
- printf ("\n");
- }
-}
-
-/* Print the value of a single SHELL_VAR. No newline is
- output, but the variable is printed in such a way that
- it can be read back in. */
-void
-print_assignment (var)
- SHELL_VAR *var;
-{
- if (var_isset (var) == 0)
- return;
-
- if (function_p (var))
- {
- printf ("%s", var->name);
- print_var_function (var);
- printf ("\n");
- }
-#if defined (ARRAY_VARS)
- else if (array_p (var))
- print_array_assignment (var, 0);
- else if (assoc_p (var))
- print_assoc_assignment (var, 0);
-#endif /* ARRAY_VARS */
- else
- {
- printf ("%s=", var->name);
- print_var_value (var, 1);
- printf ("\n");
- }
-}
-
-/* Print the value cell of VAR, a shell variable. Do not print
- the name, nor leading/trailing newline. If QUOTE is non-zero,
- and the value contains shell metacharacters, quote the value
- in such a way that it can be read back in. */
-void
-print_var_value (var, quote)
- SHELL_VAR *var;
- int quote;
-{
- char *t;
-
- if (var_isset (var) == 0)
- return;
-
- if (quote && posixly_correct == 0 && ansic_shouldquote (value_cell (var)))
- {
- t = ansic_quote (value_cell (var), 0, (int *)0);
- printf ("%s", t);
- free (t);
- }
- else if (quote && sh_contains_shell_metas (value_cell (var)))
- {
- t = sh_single_quote (value_cell (var));
- printf ("%s", t);
- free (t);
- }
- else
- printf ("%s", value_cell (var));
-}
-
-/* Print the function cell of VAR, a shell variable. Do not
- print the name, nor leading/trailing newline. */
-void
-print_var_function (var)
- SHELL_VAR *var;
-{
- char *x;
-
- if (function_p (var) && var_isset (var))
- {
- x = named_function_string ((char *)NULL, function_cell(var), FUNC_MULTILINE|FUNC_EXTERNAL);
- printf ("%s", x);
- }
-}
-
-/* **************************************************************** */
-/* */
-/* Dynamic Variables */
-/* */
-/* **************************************************************** */
-
-/* DYNAMIC VARIABLES
-
- These are variables whose values are generated anew each time they are
- referenced. These are implemented using a pair of function pointers
- in the struct variable: assign_func, which is called from bind_variable
- and, if arrays are compiled into the shell, some of the functions in
- arrayfunc.c, and dynamic_value, which is called from find_variable.
-
- assign_func is called from bind_variable_internal, if
- bind_variable_internal discovers that the variable being assigned to
- has such a function. The function is called as
- SHELL_VAR *temp = (*(entry->assign_func)) (entry, value, ind)
- and the (SHELL_VAR *)temp is returned as the value of bind_variable. It
- is usually ENTRY (self). IND is an index for an array variable, and
- unused otherwise.
-
- dynamic_value is called from find_variable_internal to return a `new'
- value for the specified dynamic varible. If this function is NULL,
- the variable is treated as a `normal' shell variable. If it is not,
- however, then this function is called like this:
- tempvar = (*(var->dynamic_value)) (var);
-
- Sometimes `tempvar' will replace the value of `var'. Other times, the
- shell will simply use the string value. Pretty object-oriented, huh?
-
- Be warned, though: if you `unset' a special variable, it loses its
- special meaning, even if you subsequently set it.
-
- The special assignment code would probably have been better put in
- subst.c: do_assignment_internal, in the same style as
- stupidly_hack_special_variables, but I wanted the changes as
- localized as possible. */
-
-#define INIT_DYNAMIC_VAR(var, val, gfunc, afunc) \
- do \
- { \
- v = bind_variable (var, (val), 0); \
- v->dynamic_value = gfunc; \
- v->assign_func = afunc; \
- } \
- while (0)
-
-#define INIT_DYNAMIC_ARRAY_VAR(var, gfunc, afunc) \
- do \
- { \
- v = make_new_array_variable (var); \
- v->dynamic_value = gfunc; \
- v->assign_func = afunc; \
- } \
- while (0)
-
-#define INIT_DYNAMIC_ASSOC_VAR(var, gfunc, afunc) \
- do \
- { \
- v = make_new_assoc_variable (var); \
- v->dynamic_value = gfunc; \
- v->assign_func = afunc; \
- } \
- while (0)
-
-static SHELL_VAR *
-null_assign (self, value, unused, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t unused;
- char *key;
-{
- return (self);
-}
-
-#if defined (ARRAY_VARS)
-static SHELL_VAR *
-null_array_assign (self, value, ind, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t ind;
- char *key;
-{
- return (self);
-}
-#endif
-
-/* Degenerate `dynamic_value' function; just returns what's passed without
- manipulation. */
-static SHELL_VAR *
-get_self (self)
- SHELL_VAR *self;
-{
- return (self);
-}
-
-#if defined (ARRAY_VARS)
-/* A generic dynamic array variable initializer. Intialize array variable
- NAME with dynamic value function GETFUNC and assignment function SETFUNC. */
-static SHELL_VAR *
-init_dynamic_array_var (name, getfunc, setfunc, attrs)
- char *name;
- sh_var_value_func_t *getfunc;
- sh_var_assign_func_t *setfunc;
- int attrs;
-{
- SHELL_VAR *v;
-
- v = find_variable (name);
- if (v)
- return (v);
- INIT_DYNAMIC_ARRAY_VAR (name, getfunc, setfunc);
- if (attrs)
- VSETATTR (v, attrs);
- return v;
-}
-
-static SHELL_VAR *
-init_dynamic_assoc_var (name, getfunc, setfunc, attrs)
- char *name;
- sh_var_value_func_t *getfunc;
- sh_var_assign_func_t *setfunc;
- int attrs;
-{
- SHELL_VAR *v;
-
- v = find_variable (name);
- if (v)
- return (v);
- INIT_DYNAMIC_ASSOC_VAR (name, getfunc, setfunc);
- if (attrs)
- VSETATTR (v, attrs);
- return v;
-}
-#endif
-
-/* The value of $SECONDS. This is the number of seconds since shell
- invocation, or, the number of seconds since the last assignment + the
- value of the last assignment. */
-static intmax_t seconds_value_assigned;
-
-static SHELL_VAR *
-assign_seconds (self, value, unused, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t unused;
- char *key;
-{
- if (legal_number (value, &seconds_value_assigned) == 0)
- seconds_value_assigned = 0;
- shell_start_time = NOW;
- return (self);
-}
-
-static SHELL_VAR *
-get_seconds (var)
- SHELL_VAR *var;
-{
- time_t time_since_start;
- char *p;
-
- time_since_start = NOW - shell_start_time;
- p = itos(seconds_value_assigned + time_since_start);
-
- FREE (value_cell (var));
-
- VSETATTR (var, att_integer);
- var_setvalue (var, p);
- return (var);
-}
-
-static SHELL_VAR *
-init_seconds_var ()
-{
- SHELL_VAR *v;
-
- v = find_variable ("SECONDS");
- if (v)
- {
- if (legal_number (value_cell(v), &seconds_value_assigned) == 0)
- seconds_value_assigned = 0;
- }
- INIT_DYNAMIC_VAR ("SECONDS", (v ? value_cell (v) : (char *)NULL), get_seconds, assign_seconds);
- return v;
-}
-
-/* The random number seed. You can change this by setting RANDOM. */
-static unsigned long rseed = 1;
-static int last_random_value;
-static int seeded_subshell = 0;
-
-/* A linear congruential random number generator based on the example
- one in the ANSI C standard. This one isn't very good, but a more
- complicated one is overkill. */
-
-/* Returns a pseudo-random number between 0 and 32767. */
-static int
-brand ()
-{
- /* From "Random number generators: good ones are hard to find",
- Park and Miller, Communications of the ACM, vol. 31, no. 10,
- October 1988, p. 1195. filtered through FreeBSD */
- long h, l;
-
- /* Can't seed with 0. */
- if (rseed == 0)
- rseed = 123459876;
- h = rseed / 127773;
- l = rseed % 127773;
- rseed = 16807 * l - 2836 * h;
-#if 0
- if (rseed < 0)
- rseed += 0x7fffffff;
-#endif
- return ((unsigned int)(rseed & 32767)); /* was % 32768 */
-}
-
-/* Set the random number generator seed to SEED. */
-static void
-sbrand (seed)
- unsigned long seed;
-{
- rseed = seed;
- last_random_value = 0;
-}
-
-static void
-seedrand ()
-{
- struct timeval tv;
-
- gettimeofday (&tv, NULL);
- sbrand (tv.tv_sec ^ tv.tv_usec ^ getpid ());
-}
-
-static SHELL_VAR *
-assign_random (self, value, unused, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t unused;
- char *key;
-{
- sbrand (strtoul (value, (char **)NULL, 10));
- if (subshell_environment)
- seeded_subshell = getpid ();
- return (self);
-}
-
-int
-get_random_number ()
-{
- int rv, pid;
-
- /* Reset for command and process substitution. */
- pid = getpid ();
- if (subshell_environment && seeded_subshell != pid)
- {
- seedrand ();
- seeded_subshell = pid;
- }
-
- do
- rv = brand ();
- while (rv == last_random_value);
- return rv;
-}
-
-static SHELL_VAR *
-get_random (var)
- SHELL_VAR *var;
-{
- int rv;
- char *p;
-
- rv = get_random_number ();
- last_random_value = rv;
- p = itos (rv);
-
- FREE (value_cell (var));
-
- VSETATTR (var, att_integer);
- var_setvalue (var, p);
- return (var);
-}
-
-static SHELL_VAR *
-assign_lineno (var, value, unused, key)
- SHELL_VAR *var;
- char *value;
- arrayind_t unused;
- char *key;
-{
- intmax_t new_value;
-
- if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0)
- new_value = 0;
- line_number = line_number_base = new_value;
- return var;
-}
-
-/* Function which returns the current line number. */
-static SHELL_VAR *
-get_lineno (var)
- SHELL_VAR *var;
-{
- char *p;
- int ln;
-
- ln = executing_line_number ();
- p = itos (ln);
- FREE (value_cell (var));
- var_setvalue (var, p);
- return (var);
-}
-
-static SHELL_VAR *
-assign_subshell (var, value, unused, key)
- SHELL_VAR *var;
- char *value;
- arrayind_t unused;
- char *key;
-{
- intmax_t new_value;
-
- if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0)
- new_value = 0;
- subshell_level = new_value;
- return var;
-}
-
-static SHELL_VAR *
-get_subshell (var)
- SHELL_VAR *var;
-{
- char *p;
-
- p = itos (subshell_level);
- FREE (value_cell (var));
- var_setvalue (var, p);
- return (var);
-}
-
-static SHELL_VAR *
-get_bashpid (var)
- SHELL_VAR *var;
-{
- int pid;
- char *p;
-
- pid = getpid ();
- p = itos (pid);
-
- FREE (value_cell (var));
- VSETATTR (var, att_integer|att_readonly);
- var_setvalue (var, p);
- return (var);
-}
-
-static SHELL_VAR *
-get_bash_command (var)
- SHELL_VAR *var;
-{
- char *p;
-
- if (the_printed_command_except_trap)
- p = savestring (the_printed_command_except_trap);
- else
- {
- p = (char *)xmalloc (1);
- p[0] = '\0';
- }
- FREE (value_cell (var));
- var_setvalue (var, p);
- return (var);
-}
-
-#if defined (HISTORY)
-static SHELL_VAR *
-get_histcmd (var)
- SHELL_VAR *var;
-{
- char *p;
-
- p = itos (history_number ());
- FREE (value_cell (var));
- var_setvalue (var, p);
- return (var);
-}
-#endif
-
-#if defined (READLINE)
-/* When this function returns, VAR->value points to malloced memory. */
-static SHELL_VAR *
-get_comp_wordbreaks (var)
- SHELL_VAR *var;
-{
- /* If we don't have anything yet, assign a default value. */
- if (rl_completer_word_break_characters == 0 && bash_readline_initialized == 0)
- enable_hostname_completion (perform_hostname_completion);
-
- FREE (value_cell (var));
- var_setvalue (var, savestring (rl_completer_word_break_characters));
-
- return (var);
-}
-
-/* When this function returns, rl_completer_word_break_characters points to
- malloced memory. */
-static SHELL_VAR *
-assign_comp_wordbreaks (self, value, unused, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t unused;
- char *key;
-{
- if (rl_completer_word_break_characters &&
- rl_completer_word_break_characters != rl_basic_word_break_characters)
- free (rl_completer_word_break_characters);
-
- rl_completer_word_break_characters = savestring (value);
- return self;
-}
-#endif /* READLINE */
-
-#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
-static SHELL_VAR *
-assign_dirstack (self, value, ind, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t ind;
- char *key;
-{
- set_dirstack_element (ind, 1, value);
- return self;
-}
-
-static SHELL_VAR *
-get_dirstack (self)
- SHELL_VAR *self;
-{
- ARRAY *a;
- WORD_LIST *l;
-
- l = get_directory_stack (0);
- a = array_from_word_list (l);
- array_dispose (array_cell (self));
- dispose_words (l);
- var_setarray (self, a);
- return self;
-}
-#endif /* PUSHD AND POPD && ARRAY_VARS */
-
-#if defined (ARRAY_VARS)
-/* We don't want to initialize the group set with a call to getgroups()
- unless we're asked to, but we only want to do it once. */
-static SHELL_VAR *
-get_groupset (self)
- SHELL_VAR *self;
-{
- register int i;
- int ng;
- ARRAY *a;
- static char **group_set = (char **)NULL;
-
- if (group_set == 0)
- {
- group_set = get_group_list (&ng);
- a = array_cell (self);
- for (i = 0; i < ng; i++)
- array_insert (a, i, group_set[i]);
- }
- return (self);
-}
-
-static SHELL_VAR *
-build_hashcmd (self)
- SHELL_VAR *self;
-{
- HASH_TABLE *h;
- int i;
- char *k, *v;
- BUCKET_CONTENTS *item;
-
- h = assoc_cell (self);
- if (h)
- assoc_dispose (h);
-
- if (hashed_filenames == 0 || HASH_ENTRIES (hashed_filenames) == 0)
- {
- var_setvalue (self, (char *)NULL);
- return self;
- }
-
- h = assoc_create (hashed_filenames->nbuckets);
- for (i = 0; i < hashed_filenames->nbuckets; i++)
- {
- for (item = hash_items (i, hashed_filenames); item; item = item->next)
- {
- k = savestring (item->key);
- v = pathdata(item)->path;
- assoc_insert (h, k, v);
- }
- }
-
- var_setvalue (self, (char *)h);
- return self;
-}
-
-static SHELL_VAR *
-get_hashcmd (self)
- SHELL_VAR *self;
-{
- build_hashcmd (self);
- return (self);
-}
-
-static SHELL_VAR *
-assign_hashcmd (self, value, ind, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t ind;
- char *key;
-{
- phash_insert (key, value, 0, 0);
- return (build_hashcmd (self));
-}
-
-#if defined (ALIAS)
-static SHELL_VAR *
-build_aliasvar (self)
- SHELL_VAR *self;
-{
- HASH_TABLE *h;
- int i;
- char *k, *v;
- BUCKET_CONTENTS *item;
-
- h = assoc_cell (self);
- if (h)
- assoc_dispose (h);
-
- if (aliases == 0 || HASH_ENTRIES (aliases) == 0)
- {
- var_setvalue (self, (char *)NULL);
- return self;
- }
-
- h = assoc_create (aliases->nbuckets);
- for (i = 0; i < aliases->nbuckets; i++)
- {
- for (item = hash_items (i, aliases); item; item = item->next)
- {
- k = savestring (item->key);
- v = ((alias_t *)(item->data))->value;
- assoc_insert (h, k, v);
- }
- }
-
- var_setvalue (self, (char *)h);
- return self;
-}
-
-static SHELL_VAR *
-get_aliasvar (self)
- SHELL_VAR *self;
-{
- build_aliasvar (self);
- return (self);
-}
-
-static SHELL_VAR *
-assign_aliasvar (self, value, ind, key)
- SHELL_VAR *self;
- char *value;
- arrayind_t ind;
- char *key;
-{
- add_alias (key, value);
- return (build_aliasvar (self));
-}
-#endif /* ALIAS */
-
-#endif /* ARRAY_VARS */
-
-/* If ARRAY_VARS is not defined, this just returns the name of any
- currently-executing function. If we have arrays, it's a call stack. */
-static SHELL_VAR *
-get_funcname (self)
- SHELL_VAR *self;
-{
-#if ! defined (ARRAY_VARS)
- char *t;
- if (variable_context && this_shell_function)
- {
- FREE (value_cell (self));
- t = savestring (this_shell_function->name);
- var_setvalue (self, t);
- }
-#endif
- return (self);
-}
-
-void
-make_funcname_visible (on_or_off)
- int on_or_off;
-{
- SHELL_VAR *v;
-
- v = find_variable ("FUNCNAME");
- if (v == 0 || v->dynamic_value == 0)
- return;
-
- if (on_or_off)
- VUNSETATTR (v, att_invisible);
- else
- VSETATTR (v, att_invisible);
-}
-
-static SHELL_VAR *
-init_funcname_var ()
-{
- SHELL_VAR *v;
-
- v = find_variable ("FUNCNAME");
- if (v)
- return v;
-#if defined (ARRAY_VARS)
- INIT_DYNAMIC_ARRAY_VAR ("FUNCNAME", get_funcname, null_array_assign);
-#else
- INIT_DYNAMIC_VAR ("FUNCNAME", (char *)NULL, get_funcname, null_assign);
-#endif
- VSETATTR (v, att_invisible|att_noassign);
- return v;
-}
-
-static void
-initialize_dynamic_variables ()
-{
- SHELL_VAR *v;
-
- v = init_seconds_var ();
-
- INIT_DYNAMIC_VAR ("BASH_COMMAND", (char *)NULL, get_bash_command, (sh_var_assign_func_t *)NULL);
- INIT_DYNAMIC_VAR ("BASH_SUBSHELL", (char *)NULL, get_subshell, assign_subshell);
-
- INIT_DYNAMIC_VAR ("RANDOM", (char *)NULL, get_random, assign_random);
- VSETATTR (v, att_integer);
- INIT_DYNAMIC_VAR ("LINENO", (char *)NULL, get_lineno, assign_lineno);
- VSETATTR (v, att_integer);
-
- INIT_DYNAMIC_VAR ("BASHPID", (char *)NULL, get_bashpid, null_assign);
- VSETATTR (v, att_integer|att_readonly);
-
-#if defined (HISTORY)
- INIT_DYNAMIC_VAR ("HISTCMD", (char *)NULL, get_histcmd, (sh_var_assign_func_t *)NULL);
- VSETATTR (v, att_integer);
-#endif
-
-#if defined (READLINE)
- INIT_DYNAMIC_VAR ("COMP_WORDBREAKS", (char *)NULL, get_comp_wordbreaks, assign_comp_wordbreaks);
-#endif
-
-#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
- v = init_dynamic_array_var ("DIRSTACK", get_dirstack, assign_dirstack, 0);
-#endif /* PUSHD_AND_POPD && ARRAY_VARS */
-
-#if defined (ARRAY_VARS)
- v = init_dynamic_array_var ("GROUPS", get_groupset, null_array_assign, att_noassign);
-
-# if defined (DEBUGGER)
- v = init_dynamic_array_var ("BASH_ARGC", get_self, null_array_assign, att_noassign|att_nounset);
- v = init_dynamic_array_var ("BASH_ARGV", get_self, null_array_assign, att_noassign|att_nounset);
-# endif /* DEBUGGER */
- v = init_dynamic_array_var ("BASH_SOURCE", get_self, null_array_assign, att_noassign|att_nounset);
- v = init_dynamic_array_var ("BASH_LINENO", get_self, null_array_assign, att_noassign|att_nounset);
-
- v = init_dynamic_assoc_var ("BASH_CMDS", get_hashcmd, assign_hashcmd, att_nofree);
-# if defined (ALIAS)
- v = init_dynamic_assoc_var ("BASH_ALIASES", get_aliasvar, assign_aliasvar, att_nofree);
-# endif
-#endif
-
- v = init_funcname_var ();
-}
-
-/* **************************************************************** */
-/* */
-/* Retrieving variables and values */
-/* */
-/* **************************************************************** */
-
-/* How to get a pointer to the shell variable or function named NAME.
- HASHED_VARS is a pointer to the hash table containing the list
- of interest (either variables or functions). */
-
-static SHELL_VAR *
-hash_lookup (name, hashed_vars)
- const char *name;
- HASH_TABLE *hashed_vars;
-{
- BUCKET_CONTENTS *bucket;
-
- bucket = hash_search (name, hashed_vars, 0);
- return (bucket ? (SHELL_VAR *)bucket->data : (SHELL_VAR *)NULL);
-}
-
-SHELL_VAR *
-var_lookup (name, vcontext)
- const char *name;
- VAR_CONTEXT *vcontext;
-{
- VAR_CONTEXT *vc;
- SHELL_VAR *v;
-
- v = (SHELL_VAR *)NULL;
- for (vc = vcontext; vc; vc = vc->down)
- if (v = hash_lookup (name, vc->table))
- break;
-
- return v;
-}
-
-/* Look up the variable entry named NAME. If SEARCH_TEMPENV is non-zero,
- then also search the temporarily built list of exported variables.
- The lookup order is:
- temporary_env
- shell_variables list
-*/
-
-SHELL_VAR *
-find_variable_internal (name, force_tempenv)
- const char *name;
- int force_tempenv;
-{
- SHELL_VAR *var;
- int search_tempenv;
-
- var = (SHELL_VAR *)NULL;
-
- /* If explicitly requested, first look in the temporary environment for
- the variable. This allows constructs such as "foo=x eval 'echo $foo'"
- to get the `exported' value of $foo. This happens if we are executing
- a function or builtin, or if we are looking up a variable in a
- "subshell environment". */
- search_tempenv = force_tempenv || (expanding_redir == 0 && subshell_environment);
-
- if (search_tempenv && temporary_env)
- var = hash_lookup (name, temporary_env);
-
- if (var == 0)
- var = var_lookup (name, shell_variables);
-
- if (var == 0)
- return ((SHELL_VAR *)NULL);
-
- return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
-}
-
-SHELL_VAR *
-find_global_variable (name)
- const char *name;
-{
- SHELL_VAR *var;
-
- var = var_lookup (name, global_variables);
-
- if (var == 0)
- return ((SHELL_VAR *)NULL);
-
- return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
-}
-
-/* Look up the variable entry named NAME. Returns the entry or NULL. */
-SHELL_VAR *
-find_variable (name)
- const char *name;
-{
- return (find_variable_internal (name, (expanding_redir == 0 && (assigning_in_environment || executing_builtin))));
-}
-
-/* Look up the function entry whose name matches STRING.
- Returns the entry or NULL. */
-SHELL_VAR *
-find_function (name)
- const char *name;
-{
- return (hash_lookup (name, shell_functions));
-}
-
-/* Find the function definition for the shell function named NAME. Returns
- the entry or NULL. */
-FUNCTION_DEF *
-find_function_def (name)
- const char *name;
-{
-#if defined (DEBUGGER)
- return ((FUNCTION_DEF *)hash_lookup (name, shell_function_defs));
-#else
- return ((FUNCTION_DEF *)0);
-#endif
-}
-
-/* Return the value of VAR. VAR is assumed to have been the result of a
- lookup without any subscript, if arrays are compiled into the shell. */
-char *
-get_variable_value (var)
- SHELL_VAR *var;
-{
- if (var == 0)
- return ((char *)NULL);
-#if defined (ARRAY_VARS)
- else if (array_p (var))
- return (array_reference (array_cell (var), 0));
- else if (assoc_p (var))
- return (assoc_reference (assoc_cell (var), "0"));
-#endif
- else
- return (value_cell (var));
-}
-
-/* Return the string value of a variable. Return NULL if the variable
- doesn't exist. Don't cons a new string. This is a potential memory
- leak if the variable is found in the temporary environment. Since
- functions and variables have separate name spaces, returns NULL if
- var_name is a shell function only. */
-char *
-get_string_value (var_name)
- const char *var_name;
-{
- SHELL_VAR *var;
-
- var = find_variable (var_name);
- return ((var) ? get_variable_value (var) : (char *)NULL);
-}
-
-/* This is present for use by the tilde and readline libraries. */
-char *
-sh_get_env_value (v)
- const char *v;
-{
- return get_string_value (v);
-}
-
-/* **************************************************************** */
-/* */
-/* Creating and setting variables */
-/* */
-/* **************************************************************** */
-
-/* Set NAME to VALUE if NAME has no value. */
-SHELL_VAR *
-set_if_not (name, value)
- char *name, *value;
-{
- SHELL_VAR *v;
-
- if (shell_variables == 0)
- create_variable_tables ();
-
- v = find_variable (name);
- if (v == 0)
- v = bind_variable_internal (name, value, global_variables->table, HASH_NOSRCH, 0);
- return (v);
-}
-
-/* Create a local variable referenced by NAME. */
-SHELL_VAR *
-make_local_variable (name)
- const char *name;
-{
- SHELL_VAR *new_var, *old_var;
- VAR_CONTEXT *vc;
- int was_tmpvar;
- char *tmp_value;
-
- /* local foo; local foo; is a no-op. */
- old_var = find_variable (name);
- if (old_var && local_p (old_var) && old_var->context == variable_context)
- {
- VUNSETATTR (old_var, att_invisible);
- return (old_var);
- }
-
- was_tmpvar = old_var && tempvar_p (old_var);
- if (was_tmpvar)
- tmp_value = value_cell (old_var);
-
- for (vc = shell_variables; vc; vc = vc->down)
- if (vc_isfuncenv (vc) && vc->scope == variable_context)
- break;
-
- if (vc == 0)
- {
- internal_error (_("make_local_variable: no function context at current scope"));
- return ((SHELL_VAR *)NULL);
- }
- else if (vc->table == 0)
- vc->table = hash_create (TEMPENV_HASH_BUCKETS);
-
- /* Since this is called only from the local/declare/typeset code, we can
- call builtin_error here without worry (of course, it will also work
- for anything that sets this_command_name). Variables with the `noassign'
- attribute may not be made local. The test against old_var's context
- level is to disallow local copies of readonly global variables (since I
- believe that this could be a security hole). Readonly copies of calling
- function local variables are OK. */
- if (old_var && (noassign_p (old_var) ||
- (readonly_p (old_var) && old_var->context == 0)))
- {
- if (readonly_p (old_var))
- sh_readonly (name);
- return ((SHELL_VAR *)NULL);
- }
-
- if (old_var == 0)
- new_var = make_new_variable (name, vc->table);
- else
- {
- new_var = make_new_variable (name, vc->table);
-
- /* If we found this variable in one of the temporary environments,
- inherit its value. Watch to see if this causes problems with
- things like `x=4 local x'. */
- if (was_tmpvar)
- var_setvalue (new_var, savestring (tmp_value));
-
- new_var->attributes = exported_p (old_var) ? att_exported : 0;
- }
-
- vc->flags |= VC_HASLOCAL;
-
- new_var->context = variable_context;
- VSETATTR (new_var, att_local);
-
- if (ifsname (name))
- setifs (new_var);
-
- return (new_var);
-}
-
-/* Create a new shell variable with name NAME. */
-static SHELL_VAR *
-new_shell_variable (name)
- const char *name;
-{
- SHELL_VAR *entry;
-
- entry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
-
- entry->name = savestring (name);
- var_setvalue (entry, (char *)NULL);
- CLEAR_EXPORTSTR (entry);
-
- entry->dynamic_value = (sh_var_value_func_t *)NULL;
- entry->assign_func = (sh_var_assign_func_t *)NULL;
-
- entry->attributes = 0;
-
- /* Always assume variables are to be made at toplevel!
- make_local_variable has the responsibilty of changing the
- variable context. */
- entry->context = 0;
-
- return (entry);
-}
-
-/* Create a new shell variable with name NAME and add it to the hash table
- TABLE. */
-static SHELL_VAR *
-make_new_variable (name, table)
- const char *name;
- HASH_TABLE *table;
-{
- SHELL_VAR *entry;
- BUCKET_CONTENTS *elt;
-
- entry = new_shell_variable (name);
-
- /* Make sure we have a shell_variables hash table to add to. */
- if (shell_variables == 0)
- create_variable_tables ();
-
- elt = hash_insert (savestring (name), table, HASH_NOSRCH);
- elt->data = (PTR_T)entry;
-
- return entry;
-}
-
-#if defined (ARRAY_VARS)
-SHELL_VAR *
-make_new_array_variable (name)
- char *name;
-{
- SHELL_VAR *entry;
- ARRAY *array;
-
- entry = make_new_variable (name, global_variables->table);
- array = array_create ();
-
- var_setarray (entry, array);
- VSETATTR (entry, att_array);
- return entry;
-}
-
-SHELL_VAR *
-make_local_array_variable (name)
- char *name;
-{
- SHELL_VAR *var;
- ARRAY *array;
-
- var = make_local_variable (name);
- if (var == 0 || array_p (var))
- return var;
-
- array = array_create ();
-
- dispose_variable_value (var);
- var_setarray (var, array);
- VSETATTR (var, att_array);
- return var;
-}
-
-SHELL_VAR *
-make_new_assoc_variable (name)
- char *name;
-{
- SHELL_VAR *entry;
- HASH_TABLE *hash;
-
- entry = make_new_variable (name, global_variables->table);
- hash = assoc_create (0);
-
- var_setassoc (entry, hash);
- VSETATTR (entry, att_assoc);
- return entry;
-}
-
-SHELL_VAR *
-make_local_assoc_variable (name)
- char *name;
-{
- SHELL_VAR *var;
- HASH_TABLE *hash;
-
- var = make_local_variable (name);
- if (var == 0 || assoc_p (var))
- return var;
-
- dispose_variable_value (var);
- hash = assoc_create (0);
-
- var_setassoc (var, hash);
- VSETATTR (var, att_assoc);
- return var;
-}
-#endif
-
-char *
-make_variable_value (var, value, flags)
- SHELL_VAR *var;
- char *value;
- int flags;
-{
- char *retval, *oval;
- intmax_t lval, rval;
- int expok, olen, op;
-
- /* If this variable has had its type set to integer (via `declare -i'),
- then do expression evaluation on it and store the result. The
- functions in expr.c (evalexp()) and bind_int_variable() are responsible
- for turning off the integer flag if they don't want further
- evaluation done. */
- if (integer_p (var))
- {
- if (flags & ASS_APPEND)
- {
- oval = value_cell (var);
- lval = evalexp (oval, &expok); /* ksh93 seems to do this */
- if (expok == 0)
- {
- top_level_cleanup ();
- jump_to_top_level (DISCARD);
- }
- }
- rval = evalexp (value, &expok);
- if (expok == 0)
- {
- top_level_cleanup ();
- jump_to_top_level (DISCARD);
- }
- if (flags & ASS_APPEND)
- rval += lval;
- retval = itos (rval);
- }
-#if defined (CASEMOD_ATTRS)
- else if (capcase_p (var) || uppercase_p (var) || lowercase_p (var))
- {
- if (flags & ASS_APPEND)
- {
- oval = get_variable_value (var);
- if (oval == 0) /* paranoia */
- oval = "";
- olen = STRLEN (oval);
- retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1);
- strcpy (retval, oval);
- if (value)
- strcpy (retval+olen, value);
- }
- else if (*value)
- retval = savestring (value);
- else
- {
- retval = (char *)xmalloc (1);
- retval[0] = '\0';
- }
- op = capcase_p (var) ? CASE_CAPITALIZE
- : (uppercase_p (var) ? CASE_UPPER : CASE_LOWER);
- oval = sh_modcase (retval, (char *)0, op);
- free (retval);
- retval = oval;
- }
-#endif /* CASEMOD_ATTRS */
- else if (value)
- {
- if (flags & ASS_APPEND)
- {
- oval = get_variable_value (var);
- if (oval == 0) /* paranoia */
- oval = "";
- olen = STRLEN (oval);
- retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1);
- strcpy (retval, oval);
- if (value)
- strcpy (retval+olen, value);
- }
- else if (*value)
- retval = savestring (value);
- else
- {
- retval = (char *)xmalloc (1);
- retval[0] = '\0';
- }
- }
- else
- retval = (char *)NULL;
-
- return retval;
-}
-
-/* Bind a variable NAME to VALUE in the HASH_TABLE TABLE, which may be the
- temporary environment (but usually is not). */
-static SHELL_VAR *
-bind_variable_internal (name, value, table, hflags, aflags)
- const char *name;
- char *value;
- HASH_TABLE *table;
- int hflags, aflags;
-{
- char *newval;
- SHELL_VAR *entry;
-
- entry = (hflags & HASH_NOSRCH) ? (SHELL_VAR *)NULL : hash_lookup (name, table);
-
- if (entry == 0)
- {
- entry = make_new_variable (name, table);
- var_setvalue (entry, make_variable_value (entry, value, 0)); /* XXX */
- }
- else if (entry->assign_func) /* array vars have assign functions now */
- {
- INVALIDATE_EXPORTSTR (entry);
- newval = (aflags & ASS_APPEND) ? make_variable_value (entry, value, aflags) : value;
- if (assoc_p (entry))
- entry = (*(entry->assign_func)) (entry, newval, -1, savestring ("0"));
- else if (array_p (entry))
- entry = (*(entry->assign_func)) (entry, newval, 0, 0);
- else
- entry = (*(entry->assign_func)) (entry, newval, -1, 0);
- if (newval != value)
- free (newval);
- return (entry);
- }
- else
- {
- if (readonly_p (entry) || noassign_p (entry))
- {
- if (readonly_p (entry))
- err_readonly (name);
- return (entry);
- }
-
- /* Variables which are bound are visible. */
- VUNSETATTR (entry, att_invisible);
-
- newval = make_variable_value (entry, value, aflags); /* XXX */
-
- /* Invalidate any cached export string */
- INVALIDATE_EXPORTSTR (entry);
-
-#if defined (ARRAY_VARS)
- /* XXX -- this bears looking at again -- XXX */
- /* If an existing array variable x is being assigned to with x=b or
- `read x' or something of that nature, silently convert it to
- x[0]=b or `read x[0]'. */
- if (array_p (entry))
- {
- array_insert (array_cell (entry), 0, newval);
- free (newval);
- }
- else if (assoc_p (entry))
- {
- assoc_insert (assoc_cell (entry), savestring ("0"), newval);
- free (newval);
- }
- else
-#endif
- {
- FREE (value_cell (entry));
- var_setvalue (entry, newval);
- }
- }
-
- if (mark_modified_vars)
- VSETATTR (entry, att_exported);
-
- if (exported_p (entry))
- array_needs_making = 1;
-
- return (entry);
-}
-
-/* Bind a variable NAME to VALUE. This conses up the name
- and value strings. If we have a temporary environment, we bind there
- first, then we bind into shell_variables. */
-
-SHELL_VAR *
-bind_variable (name, value, flags)
- const char *name;
- char *value;
- int flags;
-{
- SHELL_VAR *v;
- VAR_CONTEXT *vc;
-
- if (shell_variables == 0)
- create_variable_tables ();
-
- /* If we have a temporary environment, look there first for the variable,
- and, if found, modify the value there before modifying it in the
- shell_variables table. This allows sourced scripts to modify values
- given to them in a temporary environment while modifying the variable
- value that the caller sees. */
- if (temporary_env)
- bind_tempenv_variable (name, value);
-
- /* XXX -- handle local variables here. */
- for (vc = shell_variables; vc; vc = vc->down)
- {
- if (vc_isfuncenv (vc) || vc_isbltnenv (vc))
- {
- v = hash_lookup (name, vc->table);
- if (v)
- return (bind_variable_internal (name, value, vc->table, 0, flags));
- }
- }
- return (bind_variable_internal (name, value, global_variables->table, 0, flags));
-}
-
-/* Make VAR, a simple shell variable, have value VALUE. Once assigned a
- value, variables are no longer invisible. This is a duplicate of part
- of the internals of bind_variable. If the variable is exported, or
- all modified variables should be exported, mark the variable for export
- and note that the export environment needs to be recreated. */
-SHELL_VAR *
-bind_variable_value (var, value, aflags)
- SHELL_VAR *var;
- char *value;
- int aflags;
-{
- char *t;
-
- VUNSETATTR (var, att_invisible);
-
- if (var->assign_func)
- {
- /* If we're appending, we need the old value, so use
- make_variable_value */
- t = (aflags & ASS_APPEND) ? make_variable_value (var, value, aflags) : value;
- (*(var->assign_func)) (var, t, -1, 0);
- if (t != value && t)
- free (t);
- }
- else
- {
- t = make_variable_value (var, value, aflags);
- FREE (value_cell (var));
- var_setvalue (var, t);
- }
-
- INVALIDATE_EXPORTSTR (var);
-
- if (mark_modified_vars)
- VSETATTR (var, att_exported);
-
- if (exported_p (var))
- array_needs_making = 1;
-
- return (var);
-}
-
-/* Bind/create a shell variable with the name LHS to the RHS.
- This creates or modifies a variable such that it is an integer.
-
- This used to be in expr.c, but it is here so that all of the
- variable binding stuff is localized. Since we don't want any
- recursive evaluation from bind_variable() (possible without this code,
- since bind_variable() calls the evaluator for variables with the integer
- attribute set), we temporarily turn off the integer attribute for each
- variable we set here, then turn it back on after binding as necessary. */
-
-SHELL_VAR *
-bind_int_variable (lhs, rhs)
- char *lhs, *rhs;
-{
- register SHELL_VAR *v;
- int isint, isarr;
-
- isint = isarr = 0;
-#if defined (ARRAY_VARS)
- if (valid_array_reference (lhs))
- {
- isarr = 1;
- v = array_variable_part (lhs, (char **)0, (int *)0);
- }
- else
-#endif
- v = find_variable (lhs);
-
- if (v)
- {
- isint = integer_p (v);
- VUNSETATTR (v, att_integer);
- }
-
-#if defined (ARRAY_VARS)
- if (isarr)
- v = assign_array_element (lhs, rhs, 0);
- else
-#endif
- v = bind_variable (lhs, rhs, 0);
-
- if (v && isint)
- VSETATTR (v, att_integer);
-
- return (v);
-}
-
-SHELL_VAR *
-bind_var_to_int (var, val)
- char *var;
- intmax_t val;
-{
- char ibuf[INT_STRLEN_BOUND (intmax_t) + 1], *p;
-
- p = fmtulong (val, 10, ibuf, sizeof (ibuf), 0);
- return (bind_int_variable (var, p));
-}
-
-/* Do a function binding to a variable. You pass the name and
- the command to bind to. This conses the name and command. */
-SHELL_VAR *
-bind_function (name, value)
- const char *name;
- COMMAND *value;
-{
- SHELL_VAR *entry;
-
- entry = find_function (name);
- if (entry == 0)
- {
- BUCKET_CONTENTS *elt;
-
- elt = hash_insert (savestring (name), shell_functions, HASH_NOSRCH);
- entry = new_shell_variable (name);
- elt->data = (PTR_T)entry;
- }
- else
- INVALIDATE_EXPORTSTR (entry);
-
- if (var_isset (entry))
- dispose_command (function_cell (entry));
-
- if (value)
- var_setfunc (entry, copy_command (value));
- else
- var_setfunc (entry, 0);
-
- VSETATTR (entry, att_function);
-
- if (mark_modified_vars)
- VSETATTR (entry, att_exported);
-
- VUNSETATTR (entry, att_invisible); /* Just to be sure */
-
- if (exported_p (entry))
- array_needs_making = 1;
-
-#if defined (PROGRAMMABLE_COMPLETION)
- set_itemlist_dirty (&it_functions);
-#endif
-
- return (entry);
-}
-
-#if defined (DEBUGGER)
-/* Bind a function definition, which includes source file and line number
- information in addition to the command, into the FUNCTION_DEF hash table.*/
-void
-bind_function_def (name, value)
- const char *name;
- FUNCTION_DEF *value;
-{
- FUNCTION_DEF *entry;
- BUCKET_CONTENTS *elt;
- COMMAND *cmd;
-
- entry = find_function_def (name);
- if (entry)
- {
- dispose_function_def_contents (entry);
- entry = copy_function_def_contents (value, entry);
- }
- else
- {
- cmd = value->command;
- value->command = 0;
- entry = copy_function_def (value);
- value->command = cmd;
-
- elt = hash_insert (savestring (name), shell_function_defs, HASH_NOSRCH);
- elt->data = (PTR_T *)entry;
- }
-}
-#endif /* DEBUGGER */
-
-/* Add STRING, which is of the form foo=bar, to the temporary environment
- HASH_TABLE (temporary_env). The functions in execute_cmd.c are
- responsible for moving the main temporary env to one of the other
- temporary environments. The expansion code in subst.c calls this. */
-int
-assign_in_env (word, flags)
- WORD_DESC *word;
- int flags;
-{
- int offset;
- char *name, *temp, *value;
- SHELL_VAR *var;
- const char *string;
-
- string = word->word;
-
- offset = assignment (string, 0);
- name = savestring (string);
- value = (char *)NULL;
-
- if (name[offset] == '=')
- {
- name[offset] = 0;
-
- /* ignore the `+' when assigning temporary environment */
- if (name[offset - 1] == '+')
- name[offset - 1] = '\0';
-
- var = find_variable (name);
- if (var && (readonly_p (var) || noassign_p (var)))
- {
- if (readonly_p (var))
- err_readonly (name);
- free (name);
- return (0);
- }
-
- temp = name + offset + 1;
- value = expand_assignment_string_to_string (temp, 0);
- }
-
- if (temporary_env == 0)
- temporary_env = hash_create (TEMPENV_HASH_BUCKETS);
-
- var = hash_lookup (name, temporary_env);
- if (var == 0)
- var = make_new_variable (name, temporary_env);
- else
- FREE (value_cell (var));
-
- if (value == 0)
- {
- value = (char *)xmalloc (1); /* like do_assignment_internal */
- value[0] = '\0';
- }
-
- var_setvalue (var, value);
- var->attributes |= (att_exported|att_tempvar);
- var->context = variable_context; /* XXX */
-
- INVALIDATE_EXPORTSTR (var);
- var->exportstr = mk_env_string (name, value);
-
- array_needs_making = 1;
-
-#if 0
- if (ifsname (name))
- setifs (var);
-else
-#endif
- if (flags)
- stupidly_hack_special_variables (name);
-
- if (echo_command_at_execute)
- /* The Korn shell prints the `+ ' in front of assignment statements,
- so we do too. */
- xtrace_print_assignment (name, value, 0, 1);
-
- free (name);
- return 1;
-}
-
-/* **************************************************************** */
-/* */
-/* Copying variables */
-/* */
-/* **************************************************************** */
-
-#ifdef INCLUDE_UNUSED
-/* Copy VAR to a new data structure and return that structure. */
-SHELL_VAR *
-copy_variable (var)
- SHELL_VAR *var;
-{
- SHELL_VAR *copy = (SHELL_VAR *)NULL;
-
- if (var)
- {
- copy = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
-
- copy->attributes = var->attributes;
- copy->name = savestring (var->name);
-
- if (function_p (var))
- var_setfunc (copy, copy_command (function_cell (var)));
-#if defined (ARRAY_VARS)
- else if (array_p (var))
- var_setarray (copy, array_copy (array_cell (var)));
- else if (assoc_p (var))
- var_setassoc (copy, assoc_copy (assoc_cell (var)));
-#endif
- else if (value_cell (var))
- var_setvalue (copy, savestring (value_cell (var)));
- else
- var_setvalue (copy, (char *)NULL);
-
- copy->dynamic_value = var->dynamic_value;
- copy->assign_func = var->assign_func;
-
- copy->exportstr = COPY_EXPORTSTR (var);
-
- copy->context = var->context;
- }
- return (copy);
-}
-#endif
-
-/* **************************************************************** */
-/* */
-/* Deleting and unsetting variables */
-/* */
-/* **************************************************************** */
-
-/* Dispose of the information attached to VAR. */
-static void
-dispose_variable_value (var)
- SHELL_VAR *var;
-{
- if (function_p (var))
- dispose_command (function_cell (var));
-#if defined (ARRAY_VARS)
- else if (array_p (var))
- array_dispose (array_cell (var));
- else if (assoc_p (var))
- assoc_dispose (assoc_cell (var));
-#endif
- else
- FREE (value_cell (var));
-}
-
-void
-dispose_variable (var)
- SHELL_VAR *var;
-{
- if (var == 0)
- return;
-
- if (nofree_p (var) == 0)
- dispose_variable_value (var);
-
- FREE_EXPORTSTR (var);
-
- free (var->name);
-
- if (exported_p (var))
- array_needs_making = 1;
-
- free (var);
-}
-
-/* Unset the shell variable referenced by NAME. */
-int
-unbind_variable (name)
- const char *name;
-{
- return makunbound (name, shell_variables);
-}
-
-/* Unset the shell function named NAME. */
-int
-unbind_func (name)
- const char *name;
-{
- BUCKET_CONTENTS *elt;
- SHELL_VAR *func;
-
- elt = hash_remove (name, shell_functions, 0);
-
- if (elt == 0)
- return -1;
-
-#if defined (PROGRAMMABLE_COMPLETION)
- set_itemlist_dirty (&it_functions);
-#endif
-
- func = (SHELL_VAR *)elt->data;
- if (func)
- {
- if (exported_p (func))
- array_needs_making++;
- dispose_variable (func);
- }
-
- free (elt->key);
- free (elt);
-
- return 0;
-}
-
-#if defined (DEBUGGER)
-int
-unbind_function_def (name)
- const char *name;
-{
- BUCKET_CONTENTS *elt;
- FUNCTION_DEF *funcdef;
-
- elt = hash_remove (name, shell_function_defs, 0);
-
- if (elt == 0)
- return -1;
-
- funcdef = (FUNCTION_DEF *)elt->data;
- if (funcdef)
- dispose_function_def (funcdef);
-
- free (elt->key);
- free (elt);
-
- return 0;
-}
-#endif /* DEBUGGER */
-
-/* Make the variable associated with NAME go away. HASH_LIST is the
- hash table from which this variable should be deleted (either
- shell_variables or shell_functions).
- Returns non-zero if the variable couldn't be found. */
-int
-makunbound (name, vc)
- const char *name;
- VAR_CONTEXT *vc;
-{
- BUCKET_CONTENTS *elt, *new_elt;
- SHELL_VAR *old_var;
- VAR_CONTEXT *v;
- char *t;
-
- for (elt = (BUCKET_CONTENTS *)NULL, v = vc; v; v = v->down)
- if (elt = hash_remove (name, v->table, 0))
- break;
-
- if (elt == 0)
- return (-1);
-
- old_var = (SHELL_VAR *)elt->data;
-
- if (old_var && exported_p (old_var))
- array_needs_making++;
-
- /* If we're unsetting a local variable and we're still executing inside
- the function, just mark the variable as invisible. The function
- eventually called by pop_var_context() will clean it up later. This
- must be done so that if the variable is subsequently assigned a new
- value inside the function, the `local' attribute is still present.
- We also need to add it back into the correct hash table. */
- if (old_var && local_p (old_var) && variable_context == old_var->context)
- {
- if (nofree_p (old_var))
- var_setvalue (old_var, (char *)NULL);
-#if defined (ARRAY_VARS)
- else if (array_p (old_var))
- array_dispose (array_cell (old_var));
- else if (assoc_p (old_var))
- assoc_dispose (assoc_cell (old_var));
-#endif
- else
- FREE (value_cell (old_var));
- /* Reset the attributes. Preserve the export attribute if the variable
- came from a temporary environment. Make sure it stays local, and
- make it invisible. */
- old_var->attributes = (exported_p (old_var) && tempvar_p (old_var)) ? att_exported : 0;
- VSETATTR (old_var, att_local);
- VSETATTR (old_var, att_invisible);
- var_setvalue (old_var, (char *)NULL);
- INVALIDATE_EXPORTSTR (old_var);
-
- new_elt = hash_insert (savestring (old_var->name), v->table, 0);
- new_elt->data = (PTR_T)old_var;
- stupidly_hack_special_variables (old_var->name);
-
- free (elt->key);
- free (elt);
- return (0);
- }
-
- /* Have to save a copy of name here, because it might refer to
- old_var->name. If so, stupidly_hack_special_variables will
- reference freed memory. */
- t = savestring (name);
-
- free (elt->key);
- free (elt);
-
- dispose_variable (old_var);
- stupidly_hack_special_variables (t);
- free (t);
-
- return (0);
-}
-
-/* Get rid of all of the variables in the current context. */
-void
-kill_all_local_variables ()
-{
- VAR_CONTEXT *vc;
-
- for (vc = shell_variables; vc; vc = vc->down)
- if (vc_isfuncenv (vc) && vc->scope == variable_context)
- break;
- if (vc == 0)
- return; /* XXX */
-
- if (vc->table && vc_haslocals (vc))
- {
- delete_all_variables (vc->table);
- hash_dispose (vc->table);
- }
- vc->table = (HASH_TABLE *)NULL;
-}
-
-static void
-free_variable_hash_data (data)
- PTR_T data;
-{
- SHELL_VAR *var;
-
- var = (SHELL_VAR *)data;
- dispose_variable (var);
-}
-
-/* Delete the entire contents of the hash table. */
-void
-delete_all_variables (hashed_vars)
- HASH_TABLE *hashed_vars;
-{
- hash_flush (hashed_vars, free_variable_hash_data);
-}
-
-/* **************************************************************** */
-/* */
-/* Setting variable attributes */
-/* */
-/* **************************************************************** */
-
-#define FIND_OR_MAKE_VARIABLE(name, entry) \
- do \
- { \
- entry = find_variable (name); \
- if (!entry) \
- { \
- entry = bind_variable (name, "", 0); \
- if (!no_invisible_vars && entry) entry->attributes |= att_invisible; \
- } \
- } \
- while (0)
-
-/* Make the variable associated with NAME be readonly.
- If NAME does not exist yet, create it. */
-void
-set_var_read_only (name)
- char *name;
-{
- SHELL_VAR *entry;
-
- FIND_OR_MAKE_VARIABLE (name, entry);
- VSETATTR (entry, att_readonly);
-}
-
-#ifdef INCLUDE_UNUSED
-/* Make the function associated with NAME be readonly.
- If NAME does not exist, we just punt, like auto_export code below. */
-void
-set_func_read_only (name)
- const char *name;
-{
- SHELL_VAR *entry;
-
- entry = find_function (name);
- if (entry)
- VSETATTR (entry, att_readonly);
-}
-
-/* Make the variable associated with NAME be auto-exported.
- If NAME does not exist yet, create it. */
-void
-set_var_auto_export (name)
- char *name;
-{
- SHELL_VAR *entry;
-
- FIND_OR_MAKE_VARIABLE (name, entry);
- set_auto_export (entry);
-}
-
-/* Make the function associated with NAME be auto-exported. */
-void
-set_func_auto_export (name)
- const char *name;
-{
- SHELL_VAR *entry;
-
- entry = find_function (name);
- if (entry)
- set_auto_export (entry);
-}
-#endif
-
-/* **************************************************************** */
-/* */
-/* Creating lists of variables */
-/* */
-/* **************************************************************** */
-
-static VARLIST *
-vlist_alloc (nentries)
- int nentries;
-{
- VARLIST *vlist;
-
- vlist = (VARLIST *)xmalloc (sizeof (VARLIST));
- vlist->list = (SHELL_VAR **)xmalloc ((nentries + 1) * sizeof (SHELL_VAR *));
- vlist->list_size = nentries;
- vlist->list_len = 0;
- vlist->list[0] = (SHELL_VAR *)NULL;
-
- return vlist;
-}
-
-static VARLIST *
-vlist_realloc (vlist, n)
- VARLIST *vlist;
- int n;
-{
- if (vlist == 0)
- return (vlist = vlist_alloc (n));
- if (n > vlist->list_size)
- {
- vlist->list_size = n;
- vlist->list = (SHELL_VAR **)xrealloc (vlist->list, (vlist->list_size + 1) * sizeof (SHELL_VAR *));
- }
- return vlist;
-}
-
-static void
-vlist_add (vlist, var, flags)
- VARLIST *vlist;
- SHELL_VAR *var;
- int flags;
-{
- register int i;
-
- for (i = 0; i < vlist->list_len; i++)
- if (STREQ (var->name, vlist->list[i]->name))
- break;
- if (i < vlist->list_len)
- return;
-
- if (i >= vlist->list_size)
- vlist = vlist_realloc (vlist, vlist->list_size + 16);
-
- vlist->list[vlist->list_len++] = var;
- vlist->list[vlist->list_len] = (SHELL_VAR *)NULL;
-}
-
-/* Map FUNCTION over the variables in VAR_HASH_TABLE. Return an array of the
- variables for which FUNCTION returns a non-zero value. A NULL value
- for FUNCTION means to use all variables. */
-SHELL_VAR **
-map_over (function, vc)
- sh_var_map_func_t *function;
- VAR_CONTEXT *vc;
-{
- VAR_CONTEXT *v;
- VARLIST *vlist;
- SHELL_VAR **ret;
- int nentries;
-
- for (nentries = 0, v = vc; v; v = v->down)
- nentries += HASH_ENTRIES (v->table);
-
- if (nentries == 0)
- return (SHELL_VAR **)NULL;
-
- vlist = vlist_alloc (nentries);
-
- for (v = vc; v; v = v->down)
- flatten (v->table, function, vlist, 0);
-
- ret = vlist->list;
- free (vlist);
- return ret;
-}
-
-SHELL_VAR **
-map_over_funcs (function)
- sh_var_map_func_t *function;
-{
- VARLIST *vlist;
- SHELL_VAR **ret;
-
- if (shell_functions == 0 || HASH_ENTRIES (shell_functions) == 0)
- return ((SHELL_VAR **)NULL);
-
- vlist = vlist_alloc (HASH_ENTRIES (shell_functions));
-
- flatten (shell_functions, function, vlist, 0);
-
- ret = vlist->list;
- free (vlist);
- return ret;
-}
-
-/* Flatten VAR_HASH_TABLE, applying FUNC to each member and adding those
- elements for which FUNC succeeds to VLIST->list. FLAGS is reserved
- for future use. Only unique names are added to VLIST. If FUNC is
- NULL, each variable in VAR_HASH_TABLE is added to VLIST. If VLIST is
- NULL, FUNC is applied to each SHELL_VAR in VAR_HASH_TABLE. If VLIST
- and FUNC are both NULL, nothing happens. */
-static void
-flatten (var_hash_table, func, vlist, flags)
- HASH_TABLE *var_hash_table;
- sh_var_map_func_t *func;
- VARLIST *vlist;
- int flags;
-{
- register int i;
- register BUCKET_CONTENTS *tlist;
- int r;
- SHELL_VAR *var;
-
- if (var_hash_table == 0 || (HASH_ENTRIES (var_hash_table) == 0) || (vlist == 0 && func == 0))
- return;
-
- for (i = 0; i < var_hash_table->nbuckets; i++)
- {
- for (tlist = hash_items (i, var_hash_table); tlist; tlist = tlist->next)
- {
- var = (SHELL_VAR *)tlist->data;
-
- r = func ? (*func) (var) : 1;
- if (r && vlist)
- vlist_add (vlist, var, flags);
- }
- }
-}
-
-void
-sort_variables (array)
- SHELL_VAR **array;
-{
- qsort (array, strvec_len ((char **)array), sizeof (SHELL_VAR *), (QSFUNC *)qsort_var_comp);
-}
-
-static int
-qsort_var_comp (var1, var2)
- SHELL_VAR **var1, **var2;
-{
- int result;
-
- if ((result = (*var1)->name[0] - (*var2)->name[0]) == 0)
- result = strcmp ((*var1)->name, (*var2)->name);
-
- return (result);
-}
-
-/* Apply FUNC to each variable in SHELL_VARIABLES, adding each one for
- which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */
-static SHELL_VAR **
-vapply (func)
- sh_var_map_func_t *func;
-{
- SHELL_VAR **list;
-
- list = map_over (func, shell_variables);
- if (list /* && posixly_correct */)
- sort_variables (list);
- return (list);
-}
-
-/* Apply FUNC to each variable in SHELL_FUNCTIONS, adding each one for
- which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */
-static SHELL_VAR **
-fapply (func)
- sh_var_map_func_t *func;
-{
- SHELL_VAR **list;
-
- list = map_over_funcs (func);
- if (list /* && posixly_correct */)
- sort_variables (list);
- return (list);
-}
-
-/* Create a NULL terminated array of all the shell variables. */
-SHELL_VAR **
-all_shell_variables ()
-{
- return (vapply ((sh_var_map_func_t *)NULL));
-}
-
-/* Create a NULL terminated array of all the shell functions. */
-SHELL_VAR **
-all_shell_functions ()
-{
- return (fapply ((sh_var_map_func_t *)NULL));
-}
-
-static int
-visible_var (var)
- SHELL_VAR *var;
-{
- return (invisible_p (var) == 0);
-}
-
-SHELL_VAR **
-all_visible_functions ()
-{
- return (fapply (visible_var));
-}
-
-SHELL_VAR **
-all_visible_variables ()
-{
- return (vapply (visible_var));
-}
-
-/* Return non-zero if the variable VAR is visible and exported. Array
- variables cannot be exported. */
-static int
-visible_and_exported (var)
- SHELL_VAR *var;
-{
- return (invisible_p (var) == 0 && exported_p (var));
-}
-
-/* Candidate variables for the export environment are either valid variables
- with the export attribute or invalid variables inherited from the initial
- environment and simply passed through. */
-static int
-export_environment_candidate (var)
- SHELL_VAR *var;
-{
- return (exported_p (var) && (invisible_p (var) == 0 || imported_p (var)));
-}
-
-/* Return non-zero if VAR is a local variable in the current context and
- is exported. */
-static int
-local_and_exported (var)
- SHELL_VAR *var;
-{
- return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context && exported_p (var));
-}
-
-SHELL_VAR **
-all_exported_variables ()
-{
- return (vapply (visible_and_exported));
-}
-
-SHELL_VAR **
-local_exported_variables ()
-{
- return (vapply (local_and_exported));
-}
-
-static int
-variable_in_context (var)
- SHELL_VAR *var;
-{
- return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context);
-}
-
-SHELL_VAR **
-all_local_variables ()
-{
- VARLIST *vlist;
- SHELL_VAR **ret;
- VAR_CONTEXT *vc;
-
- vc = shell_variables;
- for (vc = shell_variables; vc; vc = vc->down)
- if (vc_isfuncenv (vc) && vc->scope == variable_context)
- break;
-
- if (vc == 0)
- {
- internal_error (_("all_local_variables: no function context at current scope"));
- return (SHELL_VAR **)NULL;
- }
- if (vc->table == 0 || HASH_ENTRIES (vc->table) == 0 || vc_haslocals (vc) == 0)
- return (SHELL_VAR **)NULL;
-
- vlist = vlist_alloc (HASH_ENTRIES (vc->table));
-
- flatten (vc->table, variable_in_context, vlist, 0);
-
- ret = vlist->list;
- free (vlist);
- if (ret)
- sort_variables (ret);
- return ret;
-}
-
-#if defined (ARRAY_VARS)
-/* Return non-zero if the variable VAR is visible and an array. */
-static int
-visible_array_vars (var)
- SHELL_VAR *var;
-{
- return (invisible_p (var) == 0 && array_p (var));
-}
-
-SHELL_VAR **
-all_array_variables ()
-{
- return (vapply (visible_array_vars));
-}
-#endif /* ARRAY_VARS */
-
-char **
-all_variables_matching_prefix (prefix)
- const char *prefix;
-{
- SHELL_VAR **varlist;
- char **rlist;
- int vind, rind, plen;
-
- plen = STRLEN (prefix);
- varlist = all_visible_variables ();
- for (vind = 0; varlist && varlist[vind]; vind++)
- ;
- if (varlist == 0 || vind == 0)
- return ((char **)NULL);
- rlist = strvec_create (vind + 1);
- for (vind = rind = 0; varlist[vind]; vind++)
- {
- if (plen == 0 || STREQN (prefix, varlist[vind]->name, plen))
- rlist[rind++] = savestring (varlist[vind]->name);
- }
- rlist[rind] = (char *)0;
- free (varlist);
-
- return rlist;
-}
-
-/* **************************************************************** */
-/* */
-/* Managing temporary variable scopes */
-/* */
-/* **************************************************************** */
-
-/* Make variable NAME have VALUE in the temporary environment. */
-static SHELL_VAR *
-bind_tempenv_variable (name, value)
- const char *name;
- char *value;
-{
- SHELL_VAR *var;
-
- var = temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL;
-
- if (var)
- {
- FREE (value_cell (var));
- var_setvalue (var, savestring (value));
- INVALIDATE_EXPORTSTR (var);
- }
-
- return (var);
-}
-
-/* Find a variable in the temporary environment that is named NAME.
- Return the SHELL_VAR *, or NULL if not found. */
-SHELL_VAR *
-find_tempenv_variable (name)
- const char *name;
-{
- return (temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL);
-}
-
-char **tempvar_list;
-int tvlist_ind;
-
-/* Push the variable described by (SHELL_VAR *)DATA down to the next
- variable context from the temporary environment. */
-static void
-push_temp_var (data)
- PTR_T data;
-{
- SHELL_VAR *var, *v;
- HASH_TABLE *binding_table;
-
- var = (SHELL_VAR *)data;
-
- binding_table = shell_variables->table;
- if (binding_table == 0)
- {
- if (shell_variables == global_variables)
- /* shouldn't happen */
- binding_table = shell_variables->table = global_variables->table = hash_create (0);
- else
- binding_table = shell_variables->table = hash_create (TEMPENV_HASH_BUCKETS);
- }
-
- v = bind_variable_internal (var->name, value_cell (var), binding_table, 0, 0);
-
- /* XXX - should we set the context here? It shouldn't matter because of how
- assign_in_env works, but might want to check. */
- if (binding_table == global_variables->table) /* XXX */
- var->attributes &= ~(att_tempvar|att_propagate);
- else
- {
- var->attributes |= att_propagate;
- if (binding_table == shell_variables->table)
- shell_variables->flags |= VC_HASTMPVAR;
- }
- v->attributes |= var->attributes;
-
- if (find_special_var (var->name) >= 0)
- tempvar_list[tvlist_ind++] = savestring (var->name);
-
- dispose_variable (var);
-}
-
-static void
-propagate_temp_var (data)
- PTR_T data;
-{
- SHELL_VAR *var;
-
- var = (SHELL_VAR *)data;
- if (tempvar_p (var) && (var->attributes & att_propagate))
- push_temp_var (data);
- else
- {
- if (find_special_var (var->name) >= 0)
- tempvar_list[tvlist_ind++] = savestring (var->name);
- dispose_variable (var);
- }
-}
-
-/* Free the storage used in the hash table for temporary
- environment variables. PUSHF is a function to be called
- to free each hash table entry. It takes care of pushing variables
- to previous scopes if appropriate. PUSHF stores names of variables
- that require special handling (e.g., IFS) on tempvar_list, so this
- function can call stupidly_hack_special_variables on all the
- variables in the list when the temporary hash table is destroyed. */
-static void
-dispose_temporary_env (pushf)
- sh_free_func_t *pushf;
-{
- int i;
-
- tempvar_list = strvec_create (HASH_ENTRIES (temporary_env) + 1);
- tempvar_list[tvlist_ind = 0] = 0;
-
- hash_flush (temporary_env, pushf);
- hash_dispose (temporary_env);
- temporary_env = (HASH_TABLE *)NULL;
-
- tempvar_list[tvlist_ind] = 0;
-
- array_needs_making = 1;
-
-#if 0
- sv_ifs ("IFS"); /* XXX here for now -- check setifs in assign_in_env */
-#endif
- for (i = 0; i < tvlist_ind; i++)
- stupidly_hack_special_variables (tempvar_list[i]);
-
- strvec_dispose (tempvar_list);
- tempvar_list = 0;
- tvlist_ind = 0;
-}
-
-void
-dispose_used_env_vars ()
-{
- if (temporary_env)
- {
- dispose_temporary_env (propagate_temp_var);
- maybe_make_export_env ();
- }
-}
-
-/* Take all of the shell variables in the temporary environment HASH_TABLE
- and make shell variables from them at the current variable context. */
-void
-merge_temporary_env ()
-{
- if (temporary_env)
- dispose_temporary_env (push_temp_var);
-}
-
-/* **************************************************************** */
-/* */
-/* Creating and manipulating the environment */
-/* */
-/* **************************************************************** */
-
-static inline char *
-mk_env_string (name, value)
- const char *name, *value;
-{
- int name_len, value_len;
- char *p;
-
- name_len = strlen (name);
- value_len = STRLEN (value);
- p = (char *)xmalloc (2 + name_len + value_len);
- strcpy (p, name);
- p[name_len] = '=';
- if (value && *value)
- strcpy (p + name_len + 1, value);
- else
- p[name_len + 1] = '\0';
- return (p);
-}
-
-#ifdef DEBUG
-/* Debugging */
-static int
-valid_exportstr (v)
- SHELL_VAR *v;
-{
- char *s;
-
- s = v->exportstr;
- if (s == 0)
- {
- internal_error (_("%s has null exportstr"), v->name);
- return (0);
- }
- if (legal_variable_starter ((unsigned char)*s) == 0)
- {
- internal_error (_("invalid character %d in exportstr for %s"), *s, v->name);
- return (0);
- }
- for (s = v->exportstr + 1; s && *s; s++)
- {
- if (*s == '=')
- break;
- if (legal_variable_char ((unsigned char)*s) == 0)
- {
- internal_error (_("invalid character %d in exportstr for %s"), *s, v->name);
- return (0);
- }
- }
- if (*s != '=')
- {
- internal_error (_("no `=' in exportstr for %s"), v->name);
- return (0);
- }
- return (1);
-}
-#endif
-
-static char **
-make_env_array_from_var_list (vars)
- SHELL_VAR **vars;
-{
- register int i, list_index;
- register SHELL_VAR *var;
- char **list, *value;
-
- list = strvec_create ((1 + strvec_len ((char **)vars)));
-
-#define USE_EXPORTSTR (value == var->exportstr)
-
- for (i = 0, list_index = 0; var = vars[i]; i++)
- {
-#if defined (__CYGWIN__)
- /* We don't use the exportstr stuff on Cygwin at all. */
- INVALIDATE_EXPORTSTR (var);
-#endif
- if (var->exportstr)
- value = var->exportstr;
- else if (function_p (var))
- value = named_function_string ((char *)NULL, function_cell (var), 0);
-#if defined (ARRAY_VARS)
- else if (array_p (var))
-# if 0
- value = array_to_assignment_string (array_cell (var));
-# else
- continue; /* XXX array vars cannot yet be exported */
-# endif
- else if (assoc_p (var))
-# if 0
- value = assoc_to_assignment_string (assoc_cell (var));
-# else
- continue; /* XXX associative array vars cannot yet be exported */
-# endif
-#endif
- else
- value = value_cell (var);
-
- if (value)
- {
- /* Gee, I'd like to get away with not using savestring() if we're
- using the cached exportstr... */
- list[list_index] = USE_EXPORTSTR ? savestring (value)
- : mk_env_string (var->name, value);
-
- if (USE_EXPORTSTR == 0)
- SAVE_EXPORTSTR (var, list[list_index]);
-
- list_index++;
-#undef USE_EXPORTSTR
-
-#if 0 /* not yet */
-#if defined (ARRAY_VARS)
- if (array_p (var) || assoc_p (var))
- free (value);
-#endif
-#endif
- }
- }
-
- list[list_index] = (char *)NULL;
- return (list);
-}
-
-/* Make an array of assignment statements from the hash table
- HASHED_VARS which contains SHELL_VARs. Only visible, exported
- variables are eligible. */
-static char **
-make_var_export_array (vcxt)
- VAR_CONTEXT *vcxt;
-{
- char **list;
- SHELL_VAR **vars;
-
-#if 0
- vars = map_over (visible_and_exported, vcxt);
-#else
- vars = map_over (export_environment_candidate, vcxt);
-#endif
-
- if (vars == 0)
- return (char **)NULL;
-
- list = make_env_array_from_var_list (vars);
-
- free (vars);
- return (list);
-}
-
-static char **
-make_func_export_array ()
-{
- char **list;
- SHELL_VAR **vars;
-
- vars = map_over_funcs (visible_and_exported);
- if (vars == 0)
- return (char **)NULL;
-
- list = make_env_array_from_var_list (vars);
-
- free (vars);
- return (list);
-}
-
-/* Add ENVSTR to the end of the exported environment, EXPORT_ENV. */
-#define add_to_export_env(envstr,do_alloc) \
-do \
- { \
- if (export_env_index >= (export_env_size - 1)) \
- { \
- export_env_size += 16; \
- export_env = strvec_resize (export_env, export_env_size); \
- environ = export_env; \
- } \
- export_env[export_env_index++] = (do_alloc) ? savestring (envstr) : envstr; \
- export_env[export_env_index] = (char *)NULL; \
- } while (0)
-
-/* Add ASSIGN to EXPORT_ENV, or supercede a previous assignment in the
- array with the same left-hand side. Return the new EXPORT_ENV. */
-char **
-add_or_supercede_exported_var (assign, do_alloc)
- char *assign;
- int do_alloc;
-{
- register int i;
- int equal_offset;
-
- equal_offset = assignment (assign, 0);
- if (equal_offset == 0)
- return (export_env);
-
- /* If this is a function, then only supersede the function definition.
- We do this by including the `=() {' in the comparison, like
- initialize_shell_variables does. */
- if (assign[equal_offset + 1] == '(' &&
- strncmp (assign + equal_offset + 2, ") {", 3) == 0) /* } */
- equal_offset += 4;
-
- for (i = 0; i < export_env_index; i++)
- {
- if (STREQN (assign, export_env[i], equal_offset + 1))
- {
- free (export_env[i]);
- export_env[i] = do_alloc ? savestring (assign) : assign;
- return (export_env);
- }
- }
- add_to_export_env (assign, do_alloc);
- return (export_env);
-}
-
-static void
-add_temp_array_to_env (temp_array, do_alloc, do_supercede)
- char **temp_array;
- int do_alloc, do_supercede;
-{
- register int i;
-
- if (temp_array == 0)
- return;
-
- for (i = 0; temp_array[i]; i++)
- {
- if (do_supercede)
- export_env = add_or_supercede_exported_var (temp_array[i], do_alloc);
- else
- add_to_export_env (temp_array[i], do_alloc);
- }
-
- free (temp_array);
-}
-
-/* Make the environment array for the command about to be executed, if the
- array needs making. Otherwise, do nothing. If a shell action could
- change the array that commands receive for their environment, then the
- code should `array_needs_making++'.
-
- The order to add to the array is:
- temporary_env
- list of var contexts whose head is shell_variables
- shell_functions
-
- This is the shell variable lookup order. We add only new variable
- names at each step, which allows local variables and variables in
- the temporary environments to shadow variables in the global (or
- any previous) scope.
-*/
-
-static int
-n_shell_variables ()
-{
- VAR_CONTEXT *vc;
- int n;
-
- for (n = 0, vc = shell_variables; vc; vc = vc->down)
- n += HASH_ENTRIES (vc->table);
- return n;
-}
-
-int
-chkexport (name)
- char *name;
-{
- SHELL_VAR *v;
-
- v = find_variable (name);
- if (exported_p (v))
- {
- array_needs_making = 1;
- maybe_make_export_env ();
- return 1;
- }
- return 0;
-}
-
-void
-maybe_make_export_env ()
-{
- register char **temp_array;
- int new_size;
- VAR_CONTEXT *tcxt;
-
- if (array_needs_making)
- {
- if (export_env)
- strvec_flush (export_env);
-
- /* Make a guess based on how many shell variables and functions we
- have. Since there will always be array variables, and array
- variables are not (yet) exported, this will always be big enough
- for the exported variables and functions. */
- new_size = n_shell_variables () + HASH_ENTRIES (shell_functions) + 1 +
- HASH_ENTRIES (temporary_env);
- if (new_size > export_env_size)
- {
- export_env_size = new_size;
- export_env = strvec_resize (export_env, export_env_size);
- environ = export_env;
- }
- export_env[export_env_index = 0] = (char *)NULL;
-
- /* Make a dummy variable context from the temporary_env, stick it on
- the front of shell_variables, call make_var_export_array on the
- whole thing to flatten it, and convert the list of SHELL_VAR *s
- to the form needed by the environment. */
- if (temporary_env)
- {
- tcxt = new_var_context ((char *)NULL, 0);
- tcxt->table = temporary_env;
- tcxt->down = shell_variables;
- }
- else
- tcxt = shell_variables;
-
- temp_array = make_var_export_array (tcxt);
- if (temp_array)
- add_temp_array_to_env (temp_array, 0, 0);
-
- if (tcxt != shell_variables)
- free (tcxt);
-
-#if defined (RESTRICTED_SHELL)
- /* Restricted shells may not export shell functions. */
- temp_array = restricted ? (char **)0 : make_func_export_array ();
-#else
- temp_array = make_func_export_array ();
-#endif
- if (temp_array)
- add_temp_array_to_env (temp_array, 0, 0);
-
- array_needs_making = 0;
- }
-}
-
-/* This is an efficiency hack. PWD and OLDPWD are auto-exported, so
- we will need to remake the exported environment every time we
- change directories. `_' is always put into the environment for
- every external command, so without special treatment it will always
- cause the environment to be remade.
-
- If there is no other reason to make the exported environment, we can
- just update the variables in place and mark the exported environment
- as no longer needing a remake. */
-void
-update_export_env_inplace (env_prefix, preflen, value)
- char *env_prefix;
- int preflen;
- char *value;
-{
- char *evar;
-
- evar = (char *)xmalloc (STRLEN (value) + preflen + 1);
- strcpy (evar, env_prefix);
- if (value)
- strcpy (evar + preflen, value);
- export_env = add_or_supercede_exported_var (evar, 0);
-}
-
-/* We always put _ in the environment as the name of this command. */
-void
-put_command_name_into_env (command_name)
- char *command_name;
-{
- update_export_env_inplace ("_=", 2, command_name);
-}
-
-#if 0 /* UNUSED -- it caused too many problems */
-void
-put_gnu_argv_flags_into_env (pid, flags_string)
- intmax_t pid;
- char *flags_string;
-{
- char *dummy, *pbuf;
- int l, fl;
-
- pbuf = itos (pid);
- l = strlen (pbuf);
-
- fl = strlen (flags_string);
-
- dummy = (char *)xmalloc (l + fl + 30);
- dummy[0] = '_';
- strcpy (dummy + 1, pbuf);
- strcpy (dummy + 1 + l, "_GNU_nonoption_argv_flags_");
- dummy[l + 27] = '=';
- strcpy (dummy + l + 28, flags_string);
-
- free (pbuf);
-
- export_env = add_or_supercede_exported_var (dummy, 0);
-}
-#endif
-
-/* **************************************************************** */
-/* */
-/* Managing variable contexts */
-/* */
-/* **************************************************************** */
-
-/* Allocate and return a new variable context with NAME and FLAGS.
- NAME can be NULL. */
-
-VAR_CONTEXT *
-new_var_context (name, flags)
- char *name;
- int flags;
-{
- VAR_CONTEXT *vc;
-
- vc = (VAR_CONTEXT *)xmalloc (sizeof (VAR_CONTEXT));
- vc->name = name ? savestring (name) : (char *)NULL;
- vc->scope = variable_context;
- vc->flags = flags;
-
- vc->up = vc->down = (VAR_CONTEXT *)NULL;
- vc->table = (HASH_TABLE *)NULL;
-
- return vc;
-}
-
-/* Free a variable context and its data, including the hash table. Dispose
- all of the variables. */
-void
-dispose_var_context (vc)
- VAR_CONTEXT *vc;
-{
- FREE (vc->name);
-
- if (vc->table)
- {
- delete_all_variables (vc->table);
- hash_dispose (vc->table);
- }
-
- free (vc);
-}
-
-/* Set VAR's scope level to the current variable context. */
-static int
-set_context (var)
- SHELL_VAR *var;
-{
- return (var->context = variable_context);
-}
-
-/* Make a new variable context with NAME and FLAGS and a HASH_TABLE of
- temporary variables, and push it onto shell_variables. This is
- for shell functions. */
-VAR_CONTEXT *
-push_var_context (name, flags, tempvars)
- char *name;
- int flags;
- HASH_TABLE *tempvars;
-{
- VAR_CONTEXT *vc;
-
- vc = new_var_context (name, flags);
- vc->table = tempvars;
- if (tempvars)
- {
- /* Have to do this because the temp environment was created before
- variable_context was incremented. */
- flatten (tempvars, set_context, (VARLIST *)NULL, 0);
- vc->flags |= VC_HASTMPVAR;
- }
- vc->down = shell_variables;
- shell_variables->up = vc;
-
- return (shell_variables = vc);
-}
-
-static void
-push_func_var (data)
- PTR_T data;
-{
- SHELL_VAR *var, *v;
-
- var = (SHELL_VAR *)data;
-
- if (tempvar_p (var) && (posixly_correct || (var->attributes & att_propagate)))
- {
- /* Make sure we have a hash table to store the variable in while it is
- being propagated down to the global variables table. Create one if
- we have to */
- if ((vc_isfuncenv (shell_variables) || vc_istempenv (shell_variables)) && shell_variables->table == 0)
- shell_variables->table = hash_create (0);
- /* XXX - should we set v->context here? */
- v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0);
- if (shell_variables == global_variables)
- var->attributes &= ~(att_tempvar|att_propagate);
- else
- shell_variables->flags |= VC_HASTMPVAR;
- v->attributes |= var->attributes;
- }
- else
- stupidly_hack_special_variables (var->name); /* XXX */
-
- dispose_variable (var);
-}
-
-/* Pop the top context off of VCXT and dispose of it, returning the rest of
- the stack. */
-void
-pop_var_context ()
-{
- VAR_CONTEXT *ret, *vcxt;
-
- vcxt = shell_variables;
- if (vc_isfuncenv (vcxt) == 0)
- {
- internal_error (_("pop_var_context: head of shell_variables not a function context"));
- return;
- }
-
- if (ret = vcxt->down)
- {
- ret->up = (VAR_CONTEXT *)NULL;
- shell_variables = ret;
- if (vcxt->table)
- hash_flush (vcxt->table, push_func_var);
- dispose_var_context (vcxt);
- }
- else
- internal_error (_("pop_var_context: no global_variables context"));
-}
-
-/* Delete the HASH_TABLEs for all variable contexts beginning at VCXT, and
- all of the VAR_CONTEXTs except GLOBAL_VARIABLES. */
-void
-delete_all_contexts (vcxt)
- VAR_CONTEXT *vcxt;
-{
- VAR_CONTEXT *v, *t;
-
- for (v = vcxt; v != global_variables; v = t)
- {
- t = v->down;
- dispose_var_context (v);
- }
-
- delete_all_variables (global_variables->table);
- shell_variables = global_variables;
-}
-
-/* **************************************************************** */
-/* */
-/* Pushing and Popping temporary variable scopes */
-/* */
-/* **************************************************************** */
-
-VAR_CONTEXT *
-push_scope (flags, tmpvars)
- int flags;
- HASH_TABLE *tmpvars;
-{
- return (push_var_context ((char *)NULL, flags, tmpvars));
-}
-
-static void
-push_exported_var (data)
- PTR_T data;
-{
- SHELL_VAR *var, *v;
-
- var = (SHELL_VAR *)data;
-
- /* If a temp var had its export attribute set, or it's marked to be
- propagated, bind it in the previous scope before disposing it. */
- /* XXX - This isn't exactly right, because all tempenv variables have the
- export attribute set. */
-#if 0
- if (exported_p (var) || (var->attributes & att_propagate))
-#else
- if (tempvar_p (var) && exported_p (var) && (var->attributes & att_propagate))
-#endif
- {
- var->attributes &= ~att_tempvar; /* XXX */
- v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0);
- if (shell_variables == global_variables)
- var->attributes &= ~att_propagate;
- v->attributes |= var->attributes;
- }
- else
- stupidly_hack_special_variables (var->name); /* XXX */
-
- dispose_variable (var);
-}
-
-void
-pop_scope (is_special)
- int is_special;
-{
- VAR_CONTEXT *vcxt, *ret;
-
- vcxt = shell_variables;
- if (vc_istempscope (vcxt) == 0)
- {
- internal_error (_("pop_scope: head of shell_variables not a temporary environment scope"));
- return;
- }
-
- ret = vcxt->down;
- if (ret)
- ret->up = (VAR_CONTEXT *)NULL;
-
- shell_variables = ret;
-
- /* Now we can take care of merging variables in VCXT into set of scopes
- whose head is RET (shell_variables). */
- FREE (vcxt->name);
- if (vcxt->table)
- {
- if (is_special)
- hash_flush (vcxt->table, push_func_var);
- else
- hash_flush (vcxt->table, push_exported_var);
- hash_dispose (vcxt->table);
- }
- free (vcxt);
-
- sv_ifs ("IFS"); /* XXX here for now */
-}
-
-/* **************************************************************** */
-/* */
-/* Pushing and Popping function contexts */
-/* */
-/* **************************************************************** */
-
-static WORD_LIST **dollar_arg_stack = (WORD_LIST **)NULL;
-static int dollar_arg_stack_slots;
-static int dollar_arg_stack_index;
-
-/* XXX - we might want to consider pushing and popping the `getopts' state
- when we modify the positional parameters. */
-void
-push_context (name, is_subshell, tempvars)
- char *name; /* function name */
- int is_subshell;
- HASH_TABLE *tempvars;
-{
- if (is_subshell == 0)
- push_dollar_vars ();
- variable_context++;
- push_var_context (name, VC_FUNCENV, tempvars);
-}
-
-/* Only called when subshell == 0, so we don't need to check, and can
- unconditionally pop the dollar vars off the stack. */
-void
-pop_context ()
-{
- pop_dollar_vars ();
- variable_context--;
- pop_var_context ();
-
- sv_ifs ("IFS"); /* XXX here for now */
-}
-
-/* Save the existing positional parameters on a stack. */
-void
-push_dollar_vars ()
-{
- if (dollar_arg_stack_index + 2 > dollar_arg_stack_slots)
- {
- dollar_arg_stack = (WORD_LIST **)
- xrealloc (dollar_arg_stack, (dollar_arg_stack_slots += 10)
- * sizeof (WORD_LIST **));
- }
- dollar_arg_stack[dollar_arg_stack_index++] = list_rest_of_args ();
- dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
-}
-
-/* Restore the positional parameters from our stack. */
-void
-pop_dollar_vars ()
-{
- if (!dollar_arg_stack || dollar_arg_stack_index == 0)
- return;
-
- remember_args (dollar_arg_stack[--dollar_arg_stack_index], 1);
- dispose_words (dollar_arg_stack[dollar_arg_stack_index]);
- dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
- set_dollar_vars_unchanged ();
-}
-
-void
-dispose_saved_dollar_vars ()
-{
- if (!dollar_arg_stack || dollar_arg_stack_index == 0)
- return;
-
- dispose_words (dollar_arg_stack[dollar_arg_stack_index]);
- dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
-}
-
-/* Manipulate the special BASH_ARGV and BASH_ARGC variables. */
-
-void
-push_args (list)
- WORD_LIST *list;
-{
-#if defined (ARRAY_VARS) && defined (DEBUGGER)
- SHELL_VAR *bash_argv_v, *bash_argc_v;
- ARRAY *bash_argv_a, *bash_argc_a;
- WORD_LIST *l;
- arrayind_t i;
- char *t;
-
- GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a);
- GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a);
-
- for (l = list, i = 0; l; l = l->next, i++)
- array_push (bash_argv_a, l->word->word);
-
- t = itos (i);
- array_push (bash_argc_a, t);
- free (t);
-#endif /* ARRAY_VARS && DEBUGGER */
-}
-
-/* Remove arguments from BASH_ARGV array. Pop top element off BASH_ARGC
- array and use that value as the count of elements to remove from
- BASH_ARGV. */
-void
-pop_args ()
-{
-#if defined (ARRAY_VARS) && defined (DEBUGGER)
- SHELL_VAR *bash_argv_v, *bash_argc_v;
- ARRAY *bash_argv_a, *bash_argc_a;
- ARRAY_ELEMENT *ce;
- intmax_t i;
-
- GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a);
- GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a);
-
- ce = array_shift (bash_argc_a, 1, 0);
- if (ce == 0 || legal_number (element_value (ce), &i) == 0)
- i = 0;
-
- for ( ; i > 0; i--)
- array_pop (bash_argv_a);
- array_dispose_element (ce);
-#endif /* ARRAY_VARS && DEBUGGER */
-}
-
-/*************************************************
- * *
- * Functions to manage special variables *
- * *
- *************************************************/
-
-/* Extern declarations for variables this code has to manage. */
-extern int eof_encountered, eof_encountered_limit, ignoreeof;
-
-#if defined (READLINE)
-extern int hostname_list_initialized;
-#endif
-
-/* An alist of name.function for each special variable. Most of the
- functions don't do much, and in fact, this would be faster with a
- switch statement, but by the end of this file, I am sick of switch
- statements. */
-
-#define SET_INT_VAR(name, intvar) intvar = find_variable (name) != 0
-
-/* This table will be sorted with qsort() the first time it's accessed. */
-struct name_and_function {
- char *name;
- sh_sv_func_t *function;
-};
-
-static struct name_and_function special_vars[] = {
- { "BASH_XTRACEFD", sv_xtracefd },
-
-#if defined (READLINE)
-# if defined (STRICT_POSIX)
- { "COLUMNS", sv_winsize },
-# endif
- { "COMP_WORDBREAKS", sv_comp_wordbreaks },
-#endif
-
- { "FUNCNEST", sv_funcnest },
-
- { "GLOBIGNORE", sv_globignore },
-
-#if defined (HISTORY)
- { "HISTCONTROL", sv_history_control },
- { "HISTFILESIZE", sv_histsize },
- { "HISTIGNORE", sv_histignore },
- { "HISTSIZE", sv_histsize },
- { "HISTTIMEFORMAT", sv_histtimefmt },
-#endif
-
-#if defined (__CYGWIN__)
- { "HOME", sv_home },
-#endif
-
-#if defined (READLINE)
- { "HOSTFILE", sv_hostfile },
-#endif
-
- { "IFS", sv_ifs },
- { "IGNOREEOF", sv_ignoreeof },
-
- { "LANG", sv_locale },
- { "LC_ALL", sv_locale },
- { "LC_COLLATE", sv_locale },
- { "LC_CTYPE", sv_locale },
- { "LC_MESSAGES", sv_locale },
- { "LC_NUMERIC", sv_locale },
- { "LC_TIME", sv_locale },
-
-#if defined (READLINE) && defined (STRICT_POSIX)
- { "LINES", sv_winsize },
-#endif
-
- { "MAIL", sv_mail },
- { "MAILCHECK", sv_mail },
- { "MAILPATH", sv_mail },
-
- { "OPTERR", sv_opterr },
- { "OPTIND", sv_optind },
-
- { "PATH", sv_path },
- { "POSIXLY_CORRECT", sv_strict_posix },
-
-#if defined (READLINE)
- { "TERM", sv_terminal },
- { "TERMCAP", sv_terminal },
- { "TERMINFO", sv_terminal },
-#endif /* READLINE */
-
- { "TEXTDOMAIN", sv_locale },
- { "TEXTDOMAINDIR", sv_locale },
-
-#if defined (HAVE_TZSET)
- { "TZ", sv_tz },
-#endif
-
-#if defined (HISTORY) && defined (BANG_HISTORY)
- { "histchars", sv_histchars },
-#endif /* HISTORY && BANG_HISTORY */
-
- { "ignoreeof", sv_ignoreeof },
-
- { (char *)0, (sh_sv_func_t *)0 }
-};
-
-#define N_SPECIAL_VARS (sizeof (special_vars) / sizeof (special_vars[0]) - 1)
-
-static int
-sv_compare (sv1, sv2)
- struct name_and_function *sv1, *sv2;
-{
- int r;
-
- if ((r = sv1->name[0] - sv2->name[0]) == 0)
- r = strcmp (sv1->name, sv2->name);
- return r;
-}
-
-static inline int
-find_special_var (name)
- const char *name;
-{
- register int i, r;
-
- for (i = 0; special_vars[i].name; i++)
- {
- r = special_vars[i].name[0] - name[0];
- if (r == 0)
- r = strcmp (special_vars[i].name, name);
- if (r == 0)
- return i;
- else if (r > 0)
- /* Can't match any of rest of elements in sorted list. Take this out
- if it causes problems in certain environments. */
- break;
- }
- return -1;
-}
-
-/* The variable in NAME has just had its state changed. Check to see if it
- is one of the special ones where something special happens. */
-void
-stupidly_hack_special_variables (name)
- char *name;
-{
- static int sv_sorted = 0;
- int i;
-
- if (sv_sorted == 0) /* shouldn't need, but it's fairly cheap. */
- {
- qsort (special_vars, N_SPECIAL_VARS, sizeof (special_vars[0]),
- (QSFUNC *)sv_compare);
- sv_sorted = 1;
- }
-
- i = find_special_var (name);
- if (i != -1)
- (*(special_vars[i].function)) (name);
-}
-
-/* Special variables that need hooks to be run when they are unset as part
- of shell reinitialization should have their sv_ functions run here. */
-void
-reinit_special_variables ()
-{
-#if defined (READLINE)
- sv_comp_wordbreaks ("COMP_WORDBREAKS");
-#endif
- sv_globignore ("GLOBIGNORE");
- sv_opterr ("OPTERR");
-}
-
-void
-sv_ifs (name)
- char *name;
-{
- SHELL_VAR *v;
-
- v = find_variable ("IFS");
- setifs (v);
-}
-
-/* What to do just after the PATH variable has changed. */
-void
-sv_path (name)
- char *name;
-{
- /* hash -r */
- phash_flush ();
-}
-
-/* What to do just after one of the MAILxxxx variables has changed. NAME
- is the name of the variable. This is called with NAME set to one of
- MAIL, MAILCHECK, or MAILPATH. */
-void
-sv_mail (name)
- char *name;
-{
- /* If the time interval for checking the files has changed, then
- reset the mail timer. Otherwise, one of the pathname vars
- to the users mailbox has changed, so rebuild the array of
- filenames. */
- if (name[4] == 'C') /* if (strcmp (name, "MAILCHECK") == 0) */
- reset_mail_timer ();
- else
- {
- free_mail_files ();
- remember_mail_dates ();
- }
-}
-
-void
-sv_funcnest (name)
- char *name;
-{
- SHELL_VAR *v;
- intmax_t num;
-
- v = find_variable (name);
- if (v == 0)
- funcnest_max = 0;
- else if (legal_number (value_cell (v), &num) == 0)
- funcnest_max = 0;
- else
- funcnest_max = num;
-}
-
-/* What to do when GLOBIGNORE changes. */
-void
-sv_globignore (name)
- char *name;
-{
- if (privileged_mode == 0)
- setup_glob_ignore (name);
-}
-
-#if defined (READLINE)
-void
-sv_comp_wordbreaks (name)
- char *name;
-{
- SHELL_VAR *sv;
-
- sv = find_variable (name);
- if (sv == 0)
- reset_completer_word_break_chars ();
-}
-
-/* What to do just after one of the TERMxxx variables has changed.
- If we are an interactive shell, then try to reset the terminal
- information in readline. */
-void
-sv_terminal (name)
- char *name;
-{
- if (interactive_shell && no_line_editing == 0)
- rl_reset_terminal (get_string_value ("TERM"));
-}
-
-void
-sv_hostfile (name)
- char *name;
-{
- SHELL_VAR *v;
-
- v = find_variable (name);
- if (v == 0)
- clear_hostname_list ();
- else
- hostname_list_initialized = 0;
-}
-
-#if defined (STRICT_POSIX)
-/* In strict posix mode, we allow assignments to LINES and COLUMNS (and values
- found in the initial environment) to override the terminal size reported by
- the kernel. */
-void
-sv_winsize (name)
- char *name;
-{
- SHELL_VAR *v;
- intmax_t xd;
- int d;
-
- if (posixly_correct == 0 || interactive_shell == 0 || no_line_editing)
- return;
-
- v = find_variable (name);
- if (v == 0 || var_isnull (v))
- rl_reset_screen_size ();
- else
- {
- if (legal_number (value_cell (v), &xd) == 0)
- return;
- winsize_assignment = 1;
- d = xd; /* truncate */
- if (name[0] == 'L') /* LINES */
- rl_set_screen_size (d, -1);
- else /* COLUMNS */
- rl_set_screen_size (-1, d);
- winsize_assignment = 0;
- }
-}
-#endif /* STRICT_POSIX */
-#endif /* READLINE */
-
-/* Update the value of HOME in the export environment so tilde expansion will
- work on cygwin. */
-#if defined (__CYGWIN__)
-sv_home (name)
- char *name;
-{
- array_needs_making = 1;
- maybe_make_export_env ();
-}
-#endif
-
-#if defined (HISTORY)
-/* What to do after the HISTSIZE or HISTFILESIZE variables change.
- If there is a value for this HISTSIZE (and it is numeric), then stifle
- the history. Otherwise, if there is NO value for this variable,
- unstifle the history. If name is HISTFILESIZE, and its value is
- numeric, truncate the history file to hold no more than that many
- lines. */
-void
-sv_histsize (name)
- char *name;
-{
- char *temp;
- intmax_t num;
- int hmax;
-
- temp = get_string_value (name);
-
- if (temp && *temp)
- {
- if (legal_number (temp, &num))
- {
- hmax = num;
- if (name[4] == 'S')
- {
- stifle_history (hmax);
- hmax = where_history ();
- if (history_lines_this_session > hmax)
- history_lines_this_session = hmax;
- }
- else
- {
- history_truncate_file (get_string_value ("HISTFILE"), hmax);
- if (hmax <= history_lines_in_file)
- history_lines_in_file = hmax;
- }
- }
- }
- else if (name[4] == 'S')
- unstifle_history ();
-}
-
-/* What to do after the HISTIGNORE variable changes. */
-void
-sv_histignore (name)
- char *name;
-{
- setup_history_ignore (name);
-}
-
-/* What to do after the HISTCONTROL variable changes. */
-void
-sv_history_control (name)
- char *name;
-{
- char *temp;
- char *val;
- int tptr;
-
- history_control = 0;
- temp = get_string_value (name);
-
- if (temp == 0 || *temp == 0)
- return;
-
- tptr = 0;
- while (val = extract_colon_unit (temp, &tptr))
- {
- if (STREQ (val, "ignorespace"))
- history_control |= HC_IGNSPACE;
- else if (STREQ (val, "ignoredups"))
- history_control |= HC_IGNDUPS;
- else if (STREQ (val, "ignoreboth"))
- history_control |= HC_IGNBOTH;
- else if (STREQ (val, "erasedups"))
- history_control |= HC_ERASEDUPS;
-
- free (val);
- }
-}
-
-#if defined (BANG_HISTORY)
-/* Setting/unsetting of the history expansion character. */
-void
-sv_histchars (name)
- char *name;
-{
- char *temp;
-
- temp = get_string_value (name);
- if (temp)
- {
- history_expansion_char = *temp;
- if (temp[0] && temp[1])
- {
- history_subst_char = temp[1];
- if (temp[2])
- history_comment_char = temp[2];
- }
- }
- else
- {
- history_expansion_char = '!';
- history_subst_char = '^';
- history_comment_char = '#';
- }
-}
-#endif /* BANG_HISTORY */
-
-void
-sv_histtimefmt (name)
- char *name;
-{
- SHELL_VAR *v;
-
- v = find_variable (name);
- history_write_timestamps = (v != 0);
-}
-#endif /* HISTORY */
-
-#if defined (HAVE_TZSET)
-void
-sv_tz (name)
- char *name;
-{
- tzset ();
-}
-#endif
-
-/* If the variable exists, then the value of it can be the number
- of times we actually ignore the EOF. The default is small,
- (smaller than csh, anyway). */
-void
-sv_ignoreeof (name)
- char *name;
-{
- SHELL_VAR *tmp_var;
- char *temp;
-
- eof_encountered = 0;
-
- tmp_var = find_variable (name);
- ignoreeof = tmp_var != 0;
- temp = tmp_var ? value_cell (tmp_var) : (char *)NULL;
- if (temp)
- eof_encountered_limit = (*temp && all_digits (temp)) ? atoi (temp) : 10;
- set_shellopts (); /* make sure `ignoreeof' is/is not in $SHELLOPTS */
-}
-
-void
-sv_optind (name)
- char *name;
-{
- char *tt;
- int s;
-
- tt = get_string_value ("OPTIND");
- if (tt && *tt)
- {
- s = atoi (tt);
-
- /* According to POSIX, setting OPTIND=1 resets the internal state
- of getopt (). */
- if (s < 0 || s == 1)
- s = 0;
- }
- else
- s = 0;
- getopts_reset (s);
-}
-
-void
-sv_opterr (name)
- char *name;
-{
- char *tt;
-
- tt = get_string_value ("OPTERR");
- sh_opterr = (tt && *tt) ? atoi (tt) : 1;
-}
-
-void
-sv_strict_posix (name)
- char *name;
-{
- SET_INT_VAR (name, posixly_correct);
- posix_initialize (posixly_correct);
-#if defined (READLINE)
- if (interactive_shell)
- posix_readline_initialize (posixly_correct);
-#endif /* READLINE */
- set_shellopts (); /* make sure `posix' is/is not in $SHELLOPTS */
-}
-
-void
-sv_locale (name)
- char *name;
-{
- char *v;
-
- v = get_string_value (name);
- if (name[0] == 'L' && name[1] == 'A') /* LANG */
- set_lang (name, v);
- else
- set_locale_var (name, v); /* LC_*, TEXTDOMAIN* */
-}
-
-#if defined (ARRAY_VARS)
-void
-set_pipestatus_array (ps, nproc)
- int *ps;
- int nproc;
-{
- SHELL_VAR *v;
- ARRAY *a;
- ARRAY_ELEMENT *ae;
- register int i;
- char *t, tbuf[INT_STRLEN_BOUND(int) + 1];
-
- v = find_variable ("PIPESTATUS");
- if (v == 0)
- v = make_new_array_variable ("PIPESTATUS");
- if (array_p (v) == 0)
- return; /* Do nothing if not an array variable. */
- a = array_cell (v);
-
- if (a == 0 || array_num_elements (a) == 0)
- {
- for (i = 0; i < nproc; i++) /* was ps[i] != -1, not i < nproc */
- {
- t = inttostr (ps[i], tbuf, sizeof (tbuf));
- array_insert (a, i, t);
- }
- return;
- }
-
- /* Fast case */
- if (array_num_elements (a) == nproc && nproc == 1)
- {
- ae = element_forw (a->head);
- free (element_value (ae));
- ae->value = itos (ps[0]);
- }
- else if (array_num_elements (a) <= nproc)
- {
- /* modify in array_num_elements members in place, then add */
- ae = a->head;
- for (i = 0; i < array_num_elements (a); i++)
- {
- ae = element_forw (ae);
- free (element_value (ae));
- ae->value = itos (ps[i]);
- }
- /* add any more */
- for ( ; i < nproc; i++)
- {
- t = inttostr (ps[i], tbuf, sizeof (tbuf));
- array_insert (a, i, t);
- }
- }
- else
- {
- /* deleting elements. it's faster to rebuild the array. */
- array_flush (a);
- for (i = 0; ps[i] != -1; i++)
- {
- t = inttostr (ps[i], tbuf, sizeof (tbuf));
- array_insert (a, i, t);
- }
- }
-}
-
-ARRAY *
-save_pipestatus_array ()
-{
- SHELL_VAR *v;
- ARRAY *a, *a2;
-
- v = find_variable ("PIPESTATUS");
- if (v == 0 || array_p (v) == 0 || array_cell (v) == 0)
- return ((ARRAY *)NULL);
-
- a = array_cell (v);
- a2 = array_copy (array_cell (v));
-
- return a2;
-}
-
-void
-restore_pipestatus_array (a)
- ARRAY *a;
-{
- SHELL_VAR *v;
- ARRAY *a2;
-
- v = find_variable ("PIPESTATUS");
- /* XXX - should we still assign even if existing value is NULL? */
- if (v == 0 || array_p (v) == 0 || array_cell (v) == 0)
- return;
-
- a2 = array_cell (v);
- var_setarray (v, a);
-
- array_dispose (a2);
-}
-#endif
-
-void
-set_pipestatus_from_exit (s)
- int s;
-{
-#if defined (ARRAY_VARS)
- static int v[2] = { 0, -1 };
-
- v[0] = s;
- set_pipestatus_array (v, 1);
-#endif
-}
-
-void
-sv_xtracefd (name)
- char *name;
-{
- SHELL_VAR *v;
- char *t, *e;
- int fd;
- FILE *fp;
-
- v = find_variable (name);
- if (v == 0)
- {
- xtrace_reset ();
- return;
- }
-
- t = value_cell (v);
- if (t == 0 || *t == 0)
- xtrace_reset ();
- else
- {
- fd = (int)strtol (t, &e, 10);
- if (e != t && *e == '\0' && sh_validfd (fd))
- {
- fp = fdopen (fd, "w");
- if (fp == 0)
- internal_error (_("%s: %s: cannot open as FILE"), name, value_cell (v));
- else
- xtrace_set (fd, fp);
- }
- else
- internal_error (_("%s: %s: invalid value for trace file descriptor"), name, value_cell (v));
- }
-}
+++ /dev/null
-/* variables.h -- data structures for shell variables. */
-
-/* Copyright (C) 1987-2010 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Bash is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with Bash. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined (_VARIABLES_H_)
-#define _VARIABLES_H_
-
-#include "stdc.h"
-#include "array.h"
-#include "assoc.h"
-
-/* Shell variables and functions are stored in hash tables. */
-#include "hashlib.h"
-
-#include "conftypes.h"
-
-/* A variable context. */
-typedef struct var_context {
- char *name; /* empty or NULL means global context */
- int scope; /* 0 means global context */
- int flags;
- struct var_context *up; /* previous function calls */
- struct var_context *down; /* down towards global context */
- HASH_TABLE *table; /* variables at this scope */
-} VAR_CONTEXT;
-
-/* Flags for var_context->flags */
-#define VC_HASLOCAL 0x01
-#define VC_HASTMPVAR 0x02
-#define VC_FUNCENV 0x04 /* also function if name != NULL */
-#define VC_BLTNENV 0x08 /* builtin_env */
-#define VC_TEMPENV 0x10 /* temporary_env */
-
-#define VC_TEMPFLAGS (VC_FUNCENV|VC_BLTNENV|VC_TEMPENV)
-
-/* Accessing macros */
-#define vc_isfuncenv(vc) (((vc)->flags & VC_FUNCENV) != 0)
-#define vc_isbltnenv(vc) (((vc)->flags & VC_BLTNENV) != 0)
-#define vc_istempenv(vc) (((vc)->flags & (VC_TEMPFLAGS)) == VC_TEMPENV)
-
-#define vc_istempscope(vc) (((vc)->flags & (VC_TEMPENV|VC_BLTNENV)) != 0)
-
-#define vc_haslocals(vc) (((vc)->flags & VC_HASLOCAL) != 0)
-#define vc_hastmpvars(vc) (((vc)->flags & VC_HASTMPVAR) != 0)
-
-/* What a shell variable looks like. */
-
-typedef struct variable *sh_var_value_func_t __P((struct variable *));
-typedef struct variable *sh_var_assign_func_t __P((struct variable *, char *, arrayind_t, char *));
-
-/* For the future */
-union _value {
- char *s; /* string value */
- intmax_t i; /* int value */
- COMMAND *f; /* function */
- ARRAY *a; /* array */
- HASH_TABLE *h; /* associative array */
- double d; /* floating point number */
-#if defined (HAVE_LONG_DOUBLE)
- long double ld; /* long double */
-#endif
- struct variable *v; /* possible indirect variable use */
- void *opaque; /* opaque data for future use */
-};
-
-typedef struct variable {
- char *name; /* Symbol that the user types. */
- char *value; /* Value that is returned. */
- char *exportstr; /* String for the environment. */
- sh_var_value_func_t *dynamic_value; /* Function called to return a `dynamic'
- value for a variable, like $SECONDS
- or $RANDOM. */
- sh_var_assign_func_t *assign_func; /* Function called when this `special
- variable' is assigned a value in
- bind_variable. */
- int attributes; /* export, readonly, array, invisible... */
- int context; /* Which context this variable belongs to. */
-} SHELL_VAR;
-
-typedef struct _vlist {
- SHELL_VAR **list;
- int list_size; /* allocated size */
- int list_len; /* current number of entries */
-} VARLIST;
-
-/* The various attributes that a given variable can have. */
-/* First, the user-visible attributes */
-#define att_exported 0x0000001 /* export to environment */
-#define att_readonly 0x0000002 /* cannot change */
-#define att_array 0x0000004 /* value is an array */
-#define att_function 0x0000008 /* value is a function */
-#define att_integer 0x0000010 /* internal representation is int */
-#define att_local 0x0000020 /* variable is local to a function */
-#define att_assoc 0x0000040 /* variable is an associative array */
-#define att_trace 0x0000080 /* function is traced with DEBUG trap */
-#define att_uppercase 0x0000100 /* word converted to uppercase on assignment */
-#define att_lowercase 0x0000200 /* word converted to lowercase on assignment */
-#define att_capcase 0x0000400 /* word capitalized on assignment */
-
-#define user_attrs (att_exported|att_readonly|att_integer|att_local|att_trace|att_uppercase|att_lowercase|att_capcase)
-
-#define attmask_user 0x0000fff
-
-/* Internal attributes used for bookkeeping */
-#define att_invisible 0x0001000 /* cannot see */
-#define att_nounset 0x0002000 /* cannot unset */
-#define att_noassign 0x0004000 /* assignment not allowed */
-#define att_imported 0x0008000 /* came from environment */
-#define att_special 0x0010000 /* requires special handling */
-#define att_nofree 0x0020000 /* do not free value on unset */
-
-#define attmask_int 0x00ff000
-
-/* Internal attributes used for variable scoping. */
-#define att_tempvar 0x0100000 /* variable came from the temp environment */
-#define att_propagate 0x0200000 /* propagate to previous scope */
-
-#define attmask_scope 0x0f00000
-
-#define exported_p(var) ((((var)->attributes) & (att_exported)))
-#define readonly_p(var) ((((var)->attributes) & (att_readonly)))
-#define array_p(var) ((((var)->attributes) & (att_array)))
-#define function_p(var) ((((var)->attributes) & (att_function)))
-#define integer_p(var) ((((var)->attributes) & (att_integer)))
-#define local_p(var) ((((var)->attributes) & (att_local)))
-#define assoc_p(var) ((((var)->attributes) & (att_assoc)))
-#define trace_p(var) ((((var)->attributes) & (att_trace)))
-#define uppercase_p(var) ((((var)->attributes) & (att_uppercase)))
-#define lowercase_p(var) ((((var)->attributes) & (att_lowercase)))
-#define capcase_p(var) ((((var)->attributes) & (att_capcase)))
-
-#define invisible_p(var) ((((var)->attributes) & (att_invisible)))
-#define non_unsettable_p(var) ((((var)->attributes) & (att_nounset)))
-#define noassign_p(var) ((((var)->attributes) & (att_noassign)))
-#define imported_p(var) ((((var)->attributes) & (att_imported)))
-#define specialvar_p(var) ((((var)->attributes) & (att_special)))
-#define nofree_p(var) ((((var)->attributes) & (att_nofree)))
-
-#define tempvar_p(var) ((((var)->attributes) & (att_tempvar)))
-
-/* Acessing variable values: rvalues */
-#define value_cell(var) ((var)->value)
-#define function_cell(var) (COMMAND *)((var)->value)
-#define array_cell(var) (ARRAY *)((var)->value)
-#define assoc_cell(var) (HASH_TABLE *)((var)->value)
-
-#define var_isnull(var) ((var)->value == 0)
-#define var_isset(var) ((var)->value != 0)
-
-/* Assigning variable values: lvalues */
-#define var_setvalue(var, str) ((var)->value = (str))
-#define var_setfunc(var, func) ((var)->value = (char *)(func))
-#define var_setarray(var, arr) ((var)->value = (char *)(arr))
-#define var_setassoc(var, arr) ((var)->value = (char *)(arr))
-
-/* Make VAR be auto-exported. */
-#define set_auto_export(var) \
- do { (var)->attributes |= att_exported; array_needs_making = 1; } while (0)
-
-#define SETVARATTR(var, attr, undo) \
- ((undo == 0) ? ((var)->attributes |= (attr)) \
- : ((var)->attributes &= ~(attr)))
-
-#define VSETATTR(var, attr) ((var)->attributes |= (attr))
-#define VUNSETATTR(var, attr) ((var)->attributes &= ~(attr))
-
-#define VGETFLAGS(var) ((var)->attributes)
-
-#define VSETFLAGS(var, flags) ((var)->attributes = (flags))
-#define VCLRFLAGS(var) ((var)->attributes = 0)
-
-/* Macros to perform various operations on `exportstr' member of a SHELL_VAR. */
-#define CLEAR_EXPORTSTR(var) (var)->exportstr = (char *)NULL
-#define COPY_EXPORTSTR(var) ((var)->exportstr) ? savestring ((var)->exportstr) : (char *)NULL
-#define SET_EXPORTSTR(var, value) (var)->exportstr = (value)
-#define SAVE_EXPORTSTR(var, value) (var)->exportstr = (value) ? savestring (value) : (char *)NULL
-
-#define FREE_EXPORTSTR(var) \
- do { if ((var)->exportstr) free ((var)->exportstr); } while (0)
-
-#define CACHE_IMPORTSTR(var, value) \
- (var)->exportstr = savestring (value)
-
-#define INVALIDATE_EXPORTSTR(var) \
- do { \
- if ((var)->exportstr) \
- { \
- free ((var)->exportstr); \
- (var)->exportstr = (char *)NULL; \
- } \
- } while (0)
-
-/* Stuff for hacking variables. */
-typedef int sh_var_map_func_t __P((SHELL_VAR *));
-
-/* Where we keep the variables and functions */
-extern VAR_CONTEXT *global_variables;
-extern VAR_CONTEXT *shell_variables;
-
-extern HASH_TABLE *shell_functions;
-extern HASH_TABLE *temporary_env;
-
-extern int variable_context;
-extern char *dollar_vars[];
-extern char **export_env;
-
-extern void initialize_shell_variables __P((char **, int));
-extern SHELL_VAR *set_if_not __P((char *, char *));
-
-extern void sh_set_lines_and_columns __P((int, int));
-extern void set_pwd __P((void));
-extern void set_ppid __P((void));
-extern void make_funcname_visible __P((int));
-
-extern SHELL_VAR *var_lookup __P((const char *, VAR_CONTEXT *));
-
-extern SHELL_VAR *find_function __P((const char *));
-extern FUNCTION_DEF *find_function_def __P((const char *));
-extern SHELL_VAR *find_variable __P((const char *));
-extern SHELL_VAR *find_variable_internal __P((const char *, int));
-extern SHELL_VAR *find_tempenv_variable __P((const char *));
-extern SHELL_VAR *find_global_variable __P((const char *));
-extern SHELL_VAR *copy_variable __P((SHELL_VAR *));
-extern SHELL_VAR *make_local_variable __P((const char *));
-extern SHELL_VAR *bind_variable __P((const char *, char *, int));
-extern SHELL_VAR *bind_function __P((const char *, COMMAND *));
-
-extern void bind_function_def __P((const char *, FUNCTION_DEF *));
-
-extern SHELL_VAR **map_over __P((sh_var_map_func_t *, VAR_CONTEXT *));
-SHELL_VAR **map_over_funcs __P((sh_var_map_func_t *));
-
-extern SHELL_VAR **all_shell_variables __P((void));
-extern SHELL_VAR **all_shell_functions __P((void));
-extern SHELL_VAR **all_visible_variables __P((void));
-extern SHELL_VAR **all_visible_functions __P((void));
-extern SHELL_VAR **all_exported_variables __P((void));
-extern SHELL_VAR **local_exported_variables __P((void));
-extern SHELL_VAR **all_local_variables __P((void));
-#if defined (ARRAY_VARS)
-extern SHELL_VAR **all_array_variables __P((void));
-#endif
-extern char **all_variables_matching_prefix __P((const char *));
-
-extern char **make_var_array __P((HASH_TABLE *));
-extern char **add_or_supercede_exported_var __P((char *, int));
-
-extern char *get_variable_value __P((SHELL_VAR *));
-extern char *get_string_value __P((const char *));
-extern char *sh_get_env_value __P((const char *));
-extern char *make_variable_value __P((SHELL_VAR *, char *, int));
-
-extern SHELL_VAR *bind_variable_value __P((SHELL_VAR *, char *, int));
-extern SHELL_VAR *bind_int_variable __P((char *, char *));
-extern SHELL_VAR *bind_var_to_int __P((char *, intmax_t));
-
-extern int assign_in_env __P((WORD_DESC *, int));
-
-extern int unbind_variable __P((const char *));
-extern int unbind_func __P((const char *));
-extern int unbind_function_def __P((const char *));
-extern int makunbound __P((const char *, VAR_CONTEXT *));
-extern int kill_local_variable __P((const char *));
-extern void delete_all_variables __P((HASH_TABLE *));
-extern void delete_all_contexts __P((VAR_CONTEXT *));
-
-extern VAR_CONTEXT *new_var_context __P((char *, int));
-extern void dispose_var_context __P((VAR_CONTEXT *));
-extern VAR_CONTEXT *push_var_context __P((char *, int, HASH_TABLE *));
-extern void pop_var_context __P((void));
-extern VAR_CONTEXT *push_scope __P((int, HASH_TABLE *));
-extern void pop_scope __P((int));
-
-extern void push_context __P((char *, int, HASH_TABLE *));
-extern void pop_context __P((void));
-extern void push_dollar_vars __P((void));
-extern void pop_dollar_vars __P((void));
-extern void dispose_saved_dollar_vars __P((void));
-
-extern void push_args __P((WORD_LIST *));
-extern void pop_args __P((void));
-
-extern void adjust_shell_level __P((int));
-extern void non_unsettable __P((char *));
-extern void dispose_variable __P((SHELL_VAR *));
-extern void dispose_used_env_vars __P((void));
-extern void dispose_function_env __P((void));
-extern void dispose_builtin_env __P((void));
-extern void merge_temporary_env __P((void));
-extern void merge_builtin_env __P((void));
-extern void kill_all_local_variables __P((void));
-
-extern void set_var_read_only __P((char *));
-extern void set_func_read_only __P((const char *));
-extern void set_var_auto_export __P((char *));
-extern void set_func_auto_export __P((const char *));
-
-extern void sort_variables __P((SHELL_VAR **));
-
-extern void chkexport __P((char *));
-extern void maybe_make_export_env __P((void));
-extern void update_export_env_inplace __P((char *, int, char *));
-extern void put_command_name_into_env __P((char *));
-extern void put_gnu_argv_flags_into_env __P((intmax_t, char *));
-
-extern void print_var_list __P((SHELL_VAR **));
-extern void print_func_list __P((SHELL_VAR **));
-extern void print_assignment __P((SHELL_VAR *));
-extern void print_var_value __P((SHELL_VAR *, int));
-extern void print_var_function __P((SHELL_VAR *));
-
-#if defined (ARRAY_VARS)
-extern SHELL_VAR *make_new_array_variable __P((char *));
-extern SHELL_VAR *make_local_array_variable __P((char *));
-
-extern SHELL_VAR *make_new_assoc_variable __P((char *));
-extern SHELL_VAR *make_local_assoc_variable __P((char *));
-
-extern void set_pipestatus_array __P((int *, int));
-extern ARRAY *save_pipestatus_array __P((void));
-extern void restore_pipestatus_array __P((ARRAY *));
-#endif
-
-extern void set_pipestatus_from_exit __P((int));
-
-/* The variable in NAME has just had its state changed. Check to see if it
- is one of the special ones where something special happens. */
-extern void stupidly_hack_special_variables __P((char *));
-
-/* Reinitialize some special variables that have external effects upon unset
- when the shell reinitializes itself. */
-extern void reinit_special_variables __P((void));
-
-extern int get_random_number __P((void));
-
-/* The `special variable' functions that get called when a particular
- variable is set. */
-extern void sv_ifs __P((char *));
-extern void sv_path __P((char *));
-extern void sv_mail __P((char *));
-extern void sv_funcnest __P((char *));
-extern void sv_globignore __P((char *));
-extern void sv_ignoreeof __P((char *));
-extern void sv_strict_posix __P((char *));
-extern void sv_optind __P((char *));
-extern void sv_opterr __P((char *));
-extern void sv_locale __P((char *));
-extern void sv_xtracefd __P((char *));
-
-#if defined (READLINE)
-extern void sv_comp_wordbreaks __P((char *));
-extern void sv_terminal __P((char *));
-extern void sv_hostfile __P((char *));
-extern void sv_winsize __P((char *));
-#endif
-
-#if defined (__CYGWIN__)
-extern void sv_home __P((char *));
-#endif
-
-#if defined (HISTORY)
-extern void sv_histsize __P((char *));
-extern void sv_histignore __P((char *));
-extern void sv_history_control __P((char *));
-# if defined (BANG_HISTORY)
-extern void sv_histchars __P((char *));
-# endif
-extern void sv_histtimefmt __P((char *));
-#endif /* HISTORY */
-
-#if defined (HAVE_TZSET) && defined (PROMPT_STRING_DECODE)
-extern void sv_tz __P((char *));
-#endif
-
-#endif /* !_VARIABLES_H_ */
projects / thirdparty / bash.git / commitdiff
