+++ /dev/null
-This document details the changes between this version, bash-4.2-release,
-and the previous version, bash-4.2-rc2.
-
-1. Changes to Bash
-
-a. Fixed a bug that caused some variables to be clobbered by a longjmp,
- resulting in stack corruption.
-
-------------------------------------------------------------------------------
-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
-
-1. 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.
-
-2. 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.
projects / thirdparty / bash.git / commitdiff
