j. Fixed a bug that caused trap handlers to be executed recursively,
corrupting internal data structures.
+k. Fixed a bug that could result in bash not compiling if certain options were
+ not enabled.
+
+l. Fixed a bug that caused the arithmetic expansion code to attempt variable
+ assignments when operator precedence prohibited them.
+
+m. Word expansions like ${foo##bar} now understand indirect variable references.
+
+n. Fixed a bug that caused `declare -fp name' to not display a function
+ definition.
+
+o. Fixed a bug that caused asynchronous child processes to modify the stdin
+ file pointer when bash was using it to read a script, which modified the
+ parent's value as well.
+
2. Changes to Readline
a. Fixed a bug in vi mode that caused the arrow keys to set the saved last
d. Fixed a bug that could cause completion to core dump if it was interrupted
by a signal.
+e. Readline now sends the meta-key enable string to the terminal if the
+ terminal has been successfully initialized.
+
+f. Readline now calls the signal hook after resizing the terminal when it
+ receives a SIGWINCH.
+
+g. Fixed a bug that could cause the history list code to perform an out-of-
+ bounds array reference if the history list is empty.
+
3. New Features in Bash
a. Shells started to run process substitutions now run any trap set on EXIT.
+b. There is now a configure-time option to enable the globasciiranges option
+ by default.
+
+c. The read builtin now checks its first variable argument for validity before
+ trying to read any input.
+
------------------------------------------------------------------------------
This document details the changes between this version, bash-4.3-alpha,
and the previous version, bash-4.2-release.
j. Fixed a bug that caused trap handlers to be executed recursively,
corrupting internal data structures.
+k. Fixed a bug that could result in bash not compiling if certain options were
+ not enabled.
+
+l. Fixed a bug that caused the arithmetic expansion code to attempt variable
+ assignments when operator precedence prohibited them.
+
+m. Word expansions like ${foo##bar} now understand indirect variable references.
+
+n. Fixed a bug that caused `declare -fp name' to not display a function
+ definition.
+
+o. Fixed a bug that caused asynchronous child processes to modify the stdin
+ file pointer when bash was using it to read a script, which modified the
+ parent's value as well.
+
2. Changes to Readline
a. Fixed a bug in vi mode that caused the arrow keys to set the saved last
d. Fixed a bug that could cause completion to core dump if it was interrupted
by a signal.
-3. New Features in Bash
-
-a. Shells started to run process substitutions now run any trap set on EXIT.
-
-------------------------------------------------------------------------------
-This document details the changes between this version, bash-4.3-alpha,
-and the previous version, bash-4.2-release.
-
-1. Changes to Bash
-
-a. Fixed several bugs concerning incomplete bracket expressions in filename
- generation (globbing) patterns.
-
-b. Fixed a bug with single quotes and WORD in ${param op WORD} when running
- in Posix mode.
-
-c. Fixed a bug that caused the pattern removal and pattern substitution word
- expansions and case statement word expansion to not match the empty string.
-
-d. Fixed a bug that caused the tzset() function to not work after changing
- the TZ enviroment variable.
-
-e. Fixed a bug that caused the RHS of an assignment statement to undergo
- word splitting when it contained an unquoted $@.
-
-f. Fixed bugs that caused the shell to not react to a SIGINT sent while
- waiting for a child process to exit.
-
-g. Bash doesn't try to run things in a signal handler context when it gets a
- signal (SIGINT/SIGHUP/etc) while reading input using readline but still
- be responsive to terminating signals.
-
-h. Fixed a bug that caused bash to go into an infinite loop if a filename
- to be matched contained an invalid multibyte character.
-
-i. Fixed a bug that caused PS4 to end up being truncated if it is longer
- than 128 bytes.
-
-j. Fixed a bug that caused brace expansion to not skip over double-quoted
- command substitution.
-
-k. System-specific updates for: DJGPP, HP/UX, Mac OS X
-
-l. Fixed a bug in displaying commands that caused redirections to be associated
- with the wrong part of the command.
-
-m. Fixed the coproc cleanup to unset the appropriate shell variables when a
- coproc terminates.
-
-n. Fixed a bug that caused `fc' to dump core due to incorrect calculation of
- the last history entry.
-
-o. Added workarounds for FreeBSD's implementation of faccessat/eaccess and
- `test -x'.
-
-p. Fixed a bug that caused the shell to not match patterns containing
- control-A.
-
-q. Fixed a bug that could result in doubled error messages when the `printf'
- builtin got a write error.
-
-r. Fixed a bug that caused the shell to not correctly expand words containing
- multiple consecutive quoted empty strings (""""""aa).
-
-s. Fixed a bug that caused the shell to not correctly parse multi-line
- process substitutions containing comments and quoted strings.
-
-t. Fixed a problem with the bash malloc's internal idea of the top of the
- memory heap that resulted in incorrect decisions to try to reduce the
- break and give memory back to the kernel.
-
-u. There are changes to the expansions peformed on compound array assignments,
- in an effort to make foo=( [ind1]=bar [ind2]=baz ) identical to
- foo[ind1]=bar foo[ind2]=baz.
-
-v. Bash now reports an error if `read -a name' is used when `name' is an
- existing associative array.
-
-w. Fixed a bug that allowed an attempted assignment to a readonly variable
- in an arithmetic expression to not return failure.
-
-x. Fixed several bugs that caused completion functions to be invoked even when
- the cursor was before the first word in the command.
-
-y. Fixed a bug that caused parsing a command substitution to overwrite the
- parsing state associated with the complete input line.
-
-z. Fixed several bugs with the built-in snprintf replacement and field widths
- and floating point.
-
-aa. Fixed a bug that caused incorrect offset calculations and input buffer
- corruption when reading files longer than 2^31 bytes.
-
-bb. Fixed several bugs where bash performed arithmetic evaluation in contexts
- where evaluation is suppressed.
-
-cc. Fixed a bug that caused bash to close FIFOs used for process substitution
- too early when a shell function was executing, but protect against using
- all file descriptors when the shell functions are invoked inside loops.
-
-dd. Added checks for printable (and non-printable) multibyte characters for
- use in error messages.
-
-ee. Fixed a bug that caused ^O (operate-and-get-next) to not work correctly
- at the end of the history list.
-
-ff. Fixed a bug that caused command-oriented history to incorrectly combine
- here documents into one line.
-
-gg. Fixed a bug that caused importing SHELLOPTS from the environment into a
- Posix-mode shell to print an error message and refuse to parse it.
-
-hh. Fixed a bug that caused the shell to delete an extra history entry when
- using `history -s'.
-
-ii. Fixed a bug that caused floating-point exceptions and overflow errors
- for the / and % arithmetic operators when using INTMAX_MIN and -1.
-
-jj. Fixed a bug that caused parsing errors when reading an arithmetic for
- loop inside a command substitution.
-
-kk. Fixed a bug that caused a readonly function to be unset when unset was
- called without the -f or -v option.
-
-ll. Fixed several bugs in the code that quotes characters special to regular
- expressions when used in a quoted string on the RHS of the =~ operator
- to the [[ command.
-
-mm. Fixed a bug that caused redirections to fail because the file descriptor
- limit was set to a value less than 10.
-
-nn. Fixed a bug that caused the `read' builtin to execute code in a signal
- handler context if read timed out.
-
-oo. Fixed a bug that caused extended globbing patterns to not match files
- beginning with `.' correctly when a `.' was explicitly supplied in the
- pattern.
-
-pp. Fixed a bug that caused key sequences longer than two characters to not
- work when used with `bind -x'.
-
-qq. Fixed a bug that resulted in redefined functions having the wrong source
- file names in BASH_SOURCE.
-
-rr. Fixed a bug that caused the read builtin to assign null strings to variables
- when using `read -N', which caused core dumps when referenced
-
-ss. Fixed a bug that caused `bash -m script' to not enable job control while
- running the script.
-
-tt. Fixed a bug that caused `printf -v var' to dump core when used with the
- %b format code.
-
-uu. Fixed a bug that caused the shell to exit with the wrong status if -e was
- active and the shell exited on a substitution error.
-
-vv. Fixed a bug that caused the shell to seg fault if an array variable with
- the same name as an existing associative array was implicitly created by
- an assignment (declare a[n]=b).
-
-ww. Fixed a bug that caused a redirection to misbehave if the number specified
- for a file descriptor overflows an intmax_t.
-
-xx. Fixed several bugs with the handling of valid and invalid unicode character
- values when used with the \u and \U escape sequences to printf and $'...'.
-
-yy. Fixed a bug that caused tildes to not be escaped in expanded filenames,
- making them subject to later expansion.
-
-zz. When using the pattern substitution word expansion, bash now runs the
- replacement string through quote removal, since it allows quotes in that
- string to act as escape characters. This is not backwards compatible, so
- it can be disabled by setting the bash compatibility mode to 4.2.
-
-aaa. Fixed the rest of the cases where the shell runs non-allowed code in a
- signal handler context.
-
-bbb. Fixed a bug that caused spurious DEL characters (\177) to appear in
- double-quoted expansion where the RHS is evaluated to the empty string.
-
-ccc. Fixed a bug that caused the use of the shell's internal random number
- generator for temporary file names to perturb the random number
- sequence.
-
-ddd. Fixed several bugs that caused `declare -g' to not set the right global
- variables or to misbehave when declaring global indexed arrays.
-
-eee. Fixed a logic bug that caused extended globbing in a multibyte locale to
- cause failures when using the pattern substititution word expansions.
-
-fff. Fixed a bug that caused the `lastpipe' option to corrupt the file
- descriptor used to read the script.
-
-ggg. Fixed a bug that causes the shell to delete DEL characters in the
- expanded value of variables used in the same quoted string as variables
- that expand to nothing.
-
-hhh. Fixed a bug that caused the shell to assign the wrong value from an
- assignment like (( x=7 )) when `x' was an existing array variable.
-
-iii. Fixed a bug that caused the shell to misbehave when generating sequences
- and the boundary values overflow an intmax_t.
-
-jjj. Fixed a bug caused expansion errors if an expansion of "$@" appeared
- next to another expansion (e.g.. "${@}${x}").
-
-kkk. Fixed a potential buffer overflow bug when performing /dev/fd expansion.
-
-lll. Fixed a bug that resulted in an extra semicolon being added to compound
- assignments when they were added to the history list.
-
-mmm. Fixed a bug that caused mapfile to read one extra line from the input.
-
-nnn. Fixed a bug that caused the mail checking code to use uninitialized
- values.
-
-ooo. Fixed a bug that prevented history timestamps from being saved if the
- history comment character is unset.
-
-ppp. Fixed a bug that caused the case-modifying expansions to not work with
- multibyte characters.
-
-qqq. Fixed a bug that caused the edit-and-execute bindable readline command
- to see the wrong data if invoked in the middle of a multi-line quoted
- string.
-
-rrr. Fixed a bug that resulted in the shell returning the wrong exit status
- for a background command on systems that recycle PIDs very quickly.
-
-sss. Fixed a bug that caused asynchronous group commands to not run any EXIT
- trap defined in the body of the command.
-
-ttt. Fixed a bug that caused `eval "... ; return"' to not clean up properly.
-
-uuu. Fixed a bug that caused the shell to dump core if `read' reads an escaped
- IFS whitespace character.
-
-vvv. Fixed a bug that caused BASH_COMMAND to be set to an incorrect value when
- executing a (...) subshell.
-
-www. Fixed a couple of pointer aliasing bugs with the token string in arithmetic
- evaluation.
-
-xxx. Fixed a bug with parsing multi-line command substitutions when reading
- the `do' keyword followed by whitespace.
-
-yyy. Fixed a bug that caused the shell to seg fault if the time given to the
- printf %(...)T format overflowed the value accepted by localtime(3).
-
-zzz. Fixed a problem with displaying help topics in two columns when the
- translated text contained multibyte characters.
-
-aaaa. Fixed a bug with the extended globbing pattern matcher where a `*' was
- followed by a negated extended glob pattern.
-
-bbbb. Fixed a race condition with short-lived coproc creation and reaping that
- caused the child process to be reaped before the various coproc shell
- variables were initialized.
+e. Readline now sends the meta-key enable string to the terminal if the
+ terminal has been successfully initialized.
-cccc. Fixed a bug where turning off `errexit' in command substitution subshells
- was not reflected in $SHELLOPTS.
+f. Readline now calls the signal hook after resizing the terminal when it
+ receives a SIGWINCH.
-dddd. Partially fixed an inconsistency in how the shell treated shell
- functions run from an EXIT trap.
-
-eeee. Fixed a bug in how the shell invalidated FIFOs used for process
- substitution when executing a pipeline (once rather than in every child).
-
-ffff. Fixed a bug that occurred when expanding a special variable ($@, $*)
- within double quotes and the expansion resulted in an empty string.
-
-gggg. Fixed bugs with executing a SIGCHLD trap handler to make sure that it's
- executed once per exited child.
-
-hhhh. Fixed a bug that caused `declare' and `test' to find variables that
- had been given attributes but not assigned values. Such variables are
- not set.
-
-iiii. Fixed a bug that caused commands in process substitutions to not look in
- the local temporary environment when performing word expansions.
-
-jjjj. Fixed several problems with globstar expansions (**/**) returning null
- filenames and multiple instances of the same pathname.
-
-kkkk. Fixed an oversight that did not allow the exit status of `coproc' to
- be inverted using `!'.
-
-llll. Fixed a bug that caused the -e option to be re-enabled using `set -e'
- even when executing in a context where -e is ignored.
-
-mmmm. Fixed a (mostly theoretical) bug with input lines longer than SIZE_MAX.
-
-nnnn. Fixed a bug that could result in double evaluation of command
- substitutions when they appear in failed redirections.
-
-oooo. Fixed a bug that could cause seg faults during `mapfile' callbacks if
- the callback unsets the array variable mapfile is using.
-
-pppp. Fixed several problems with variable assignments using ${var:=value}
- when the variable assignment is supposed to have side effects.
-
-qqqq. Fixed a bug that caused a failure of an assignment statement preceding a
- builtin caused the next invocation of a special builtin to exit the shell.
-
-rrrr. Fixed several problems with IFS when it appears in the temporary environment
- and is used in redirections.
-
-ssss. Fixed a problem that caused IFS changes using ${IFS:=value} to modify
- how preceding expansions were split.
-
-tttt. Fixed a problem that caused subshells to not run an EXIT trap they set.
-
-uuuu. Fixed a problem that caused shells started in posix mode to attempt to
- import shell functions with invalid names from the environment. We now
- print a warning.
-
-vvvv. Worked around a kernel problem that caused SIGCHLD to interrupt open(2)
- on a FIFO used for process substitution, even if the SIGCHLD handler was
- installed with the SA_RESTART flag.
-
-wwww. Fixed a problem that resulted in inconsistent expansion of $* and ${a[*]}.
-
-xxxx. Fixed a problem that caused `read -t' to crash when interrupted by
- SIGINT.
-
-yyyy. Fixed a problem that caused pattern removal to fail randomly because the
- pattern matcher read beyond the end of a string.
-
-zzzz. Fixed a bug that caused core dumps when shell functions tried to create
- local shadow copies of special variables like GROUPS.
-
-aaaaa. Fixed a bug that caused SIGTERM to be occasionally lost by children of
- interactive shells when it arrived before the child process reset the
- handler from SIG_DFL.
-
-bbbbb. Fixed a bug that caused redirections like <&n- to leave file descriptor
- n closed if executed with a builtin command.
-
-ccccc. Fixed a bug that caused incorrect completion quoting when completing a
- word containing a globbing character with `show-all-if-ambiguous' set.
-
-ddddd. Fixed a bug that caused printf's %q format specifier not to quote a
- tilde even if it appeared in a location where it would be subject to
- tilde expansion.
-
-2. Changes to Readline
-
-a. Fixed a bug that did not allow the `dd', `cc', or `yy' vi editing mode
- commands to work on the entire line.
-
-b. Fixed a bug that caused redisplay problems with prompts longer than 128
- characters and history searches.
-
-c. Fixed a bug that caused readline to try and run code to modify its idea
- of the screen size in a signal handler context upon receiving a SIGWINCH.
-
-d. Fixed a bug that caused the `meta' key to be enabled beyond the duration
- of an individual call top readline().
-
-e. Added a workaround for a wcwidth bug in Mac OS X that caused readline's
- redisplay to mishandle zero-width combining characters.
-
-f. Fixed a bug that caused readline to `forget' part of a key sequence when
- a multiple-key sequence caused it to break out of an incremental search.
-
-g. Fixed bugs that caused readline to execute code in a signal handler
- context if interrupted while reading from the file system during completion.
-
-h. Fixed a bug that caused readline to `forget' part of a key sequence when
- reading an unbound multi-character key sequence.
-
-i. Fixed a bug that caused Readline's signal handlers to be installed beyond
- the bounds of a single call to readline().
-
-j. Fixed a bug that caused the `.' command to not redo the most recent `R'
- command in vi mode.
-
-k. Fixed a bug that caused ignoring case in completion matches to result in
- readline using the wrong match.
-
-l. Paren matching now works in vi insert mode.
-
-m. Fix menu-completion to make show-all-if-ambiguous and menu-complete-display-prefix
- work together.
-
-n. Fixed a bug that didn't allow the `cc', `dd', or `yy' commands to be redone
- in vi editing mode.
-
-o. Fixed a bug that caused the filename comparison code to not compare
- multibyte characters correctly when using case-sensitive or case-mapping
- comparisons.
-
-p. Fixed the input reading loop to call the input hook function only when there
- is no terminal input available.
-
-q. Fixed a bug that caused binding a macro to a multi-character key sequence
- where the sequence and macro value share a common prefix to not perform
- the macro replacement.
-
-r. Fixed several redisplay errors with multibyte characters and prompts
- containing invisible characters when using horizontal scrolling.
-
-s. Fixed a bug that caused redisplay errors when trying to overwrite
- existing characters using multibyte characters.
+g. Fixed a bug that could cause the history list code to perform an out-of-
+ bounds array reference if the history list is empty.
3. New Features in Bash
-a. The `helptopic' completion action now maps to all the help topics, not just
- the shell builtins.
-
-b. The `help' builtin no longer does prefix substring matching, so `help read'
- does not match `readonly'.
-
-c. The shell can be compiled to not display a message about processes that
- terminate due to SIGTERM.
-
-d. Non-interactive shells now react to the setting of checkwinsize and set
- LINES and COLUMNS after a foreground job exits.
-
-e. There is a new shell option, `globasciiranges', which, when set to on,
- forces globbing range comparisons to use character ordering as if they
- were run in the C locale.
-
-f. There is a new shell option, `direxpand', which makes filename completion
- expand variables in directory names in the way bash-4.1 did.
-
-g. In Posix mode, the `command' builtin does not change whether or not a
- builtin it shadows is treated as an assignment builtin.
-
-h. The `return' and `exit' builtins accept negative exit status arguments.
-
-i. The word completion code checks whether or not a filename containing a
- shell variable expands to a directory name and appends `/' to the word
- as appropriate. The same code expands shell variables in command names
- when performing command completion.
-
-j. In Posix mode, it is now an error to attempt to define a shell function
- with the same name as a Posix special builtin.
+a. Shells started to run process substitutions now run any trap set on EXIT.
-k. When compiled for strict Posix conformance, history expansion is disabled
+b. There is now a configure-time option to enable the globasciiranges option
by default.
-l. The history expansion character (!) does not cause history expansion when
- followed by the closing quote in a double-quoted string.
-
-m. `complete' and its siblings compgen/compopt now takes a new `-o noquote'
- option to inhibit quoting of the completions.
-
-n. Setting HISTSIZE to a value less than zero causes the history list to be
- unlimited (setting it 0 zero disables the history list).
-
-o. Setting HISTFILESIZE to a value less than zero causes the history file size
- to be unlimited (setting it to 0 causes the history file to be truncated
- to zero size).
-
-p. The `read' builtin now skips NUL bytes in the input.
-
-q. There is a new `bind -X' option to print all key sequences bound to Unix
- commands.
-
-r. When in Posix mode, `read' is interruptible by a trapped signal. After
- running the trap handler, read returns 128+signal and throws away any
- partially-read input.
-
-s. The command completion code skips whitespace and assignment statements
- before looking for the command name word to be completed.
-
-t. The build process has a new mechanism for constructing separate help files
- that better reflects the current set of compilation options.
-
-u. The -nt and -ot options to test now work with files with nanosecond
- timestamp resolution.
-
-v. The shell saves the command history in any shell for which history is
- enabled and HISTFILE is set, not just interactive shells.
-
-w. The shell has `nameref' variables and new -n(/+n) options to declare and
- unset to use them, and a `test -R' option to test for them.
-
-x. The shell now allows assigning, referencing, and unsetting elements of
- indexed arrays using negative subscripts (a[-1]=2, echo ${a[-1]}) which
- count back from the last element of the array.
-
-y. The {x}<word redirection feature now allows words like {array[ind]} and
- can use variables with special meanings to the shell (e.g., BASH_XTRACEFD).
-
-z. There is a new CHILD_MAX special shell variable; its value controls the
- number of exited child statues the shell remembers.
-
-aa. There is a new configuration option (--enable-direxpand-default) that
- causes the `direxpand' shell option to be enabled by default.
-
-bb. Bash does not do anything special to ensure that the file descriptor
- assigned to X in {x}<foo remains open after the block containing it
- completes.
-
-cc. The `wait' builtin has a new `-n' option to wait for the next child to
- change status.
-
-dd. The `printf' %(...)T format specifier now uses the current time if no
- argument is supplied.
-
-ee. There is a new variable, BASH_COMPAT, that controls the current shell
- compatibility level.
-
-ff. The `popd' builtin now treats additional arguments as errors.
-
-gg. The brace expansion code now treats a failed sequence expansion as a
- simple string and will continue to expand brace terms in the remainder
- of the word.
-
-4. New Features in Readline
-
-a. Readline is now more responsive to SIGHUP and other fatal signals when
- reading input from the terminal or performing word completion but no
- longer attempts to run any not-allowable functions from a signal handler
- context.
-
-b. There are new bindable commands to search the history for the string of
- characters between the beginning of the line and the point
- (history-substring-search-forward, history-substring-search-backward)
-
-c. Readline allows quoted strings as the values of variables when setting
- them with `set'. As a side effect, trailing spaces and tabs are ignored
- when setting a string variable's value.
-
-d. The history library creates a backup of the history file when writing it
- and restores the backup on a write error.
-
-e. New application-settable variable: rl_filename_stat_hook: a function called
- with a filename before using it in a call to stat(2). Bash uses it to
- expand shell variables so things like $HOME/Downloads have a slash
- appended.
-
-f. New bindable function `print-last-kbd-macro', prints the most-recently-
- defined keyboard macro in a reusable format.
-
-g. New user-settable variable `colored-stats', enables use of colored text
- to denote file types when displaying possible completions (colored analog
- of visible-stats).
-
-h. New user-settable variable `keyseq-timout', acts as an inter-character
- timeout when reading input or incremental search strings.
-
-i. New application-callable function: rl_clear_history. Clears the history list
- and frees all readline-associated private data.
-
-j. New user-settable variable, show-mode-in-prompt, adds a characters to the
- beginning of the prompt indicating the current editing mode.
-
-k. New application-settable variable: rl_input_available_hook; function to be
- called when readline detects there is data available on its input file
- descriptor.
-
-l. Readline calls an application-set event hook (rl_signal_event_hook) after
- it gets a signal while reading input (read returns -1/EINTR but readline
- does not handle the signal immediately) to allow the application to handle
- or otherwise note it. Not currently called for SIGHUP or SIGTERM.
-
-m. If the user-settable variable `history-size' is set to a value less than
- 0, the history list size is unlimited.
+c. The read builtin now checks its first variable argument for validity before
+ trying to read any input.
doc/{bash.1,bashref.texi}
- slight change to add a description of `shopt -o' suggested by Bruce
Korb <bruce.korb@gmail.com>
+
+ 7/19
+ ----
+lib/readline/histfile.c
+ - history_do_write: if close returns < 0, make sure we restore the
+ backup history file and return a non-zero value
+ - history_truncate_file: if write or close return < 0, make sure we
+ return a non-zero value
+
+[bash-4.3-beta frozen]
+
+ 7/21
+ ----
+lib/readline/isearch.c
+ - rl_display_search: now takes an entire search context flags word as
+ the second argument, instead of just reverse flag; changed callers
+ - rl_display_search: if the search has failed, add `failed ' to the
+ beginning of the search prompt
+ - _rl_isearch_dispatch: if the search has failed, display the entire
+ search string with an indication that the search failed but with the
+ last matching line. Suggested by jidanni@jidanni.org
+
+command.h
+ - W_ASSIGNINT: new word flag; used internally for make_internal_declare
+ and set by fix_assignment_words
+
+execute_cmd.c
+ - fix_assignment_words: set W_ASSIGNINT if compound assignment and -i
+ given as option. We don't do anything with the value yet
+
+subst.c
+ - shell_expand_word_list: rework the way the option list that is
+ passed to make_internal_declare is created
the parent process as well, since parents and children share the
file pointer. Fixes problem originally reported in March 2013 by
Martin Jackson <mjackson220.list@gmail.com>
+
+ 7/13
+ ----
+doc/{bash.1,bashref.texi}
+ - slight change to add a description of `shopt -o' suggested by Bruce
+ Korb <bruce.korb@gmail.com>
+
+ 7/19
+ ----
+lib/readline/histfile.c
+ - history_do_write: if close returns < 0, make sure we restore the
+ backup history file and return a non-zero value
+ - history_truncate_file: if write or close return < 0, make sure we
+ return a non-zero value
+
+[bash-4.3-beta frozen]
+
+ 7/21
+ ----
+lib/readline/isearch.c
+ - rl_display_search: now takes an entire search context flags word as
+ the second argument, instead of just reverse flag; changed callers
+ - rl_display_search: if the search has failed, add `failed ' to the
+ beginning of the search prompt
+ - _rl_isearch_dispatch: if the search has failed, display the entire
+ search string with an indication that the search failed but with the
+ last matching line. Suggested by jidanni@jidanni.org
+
+command.h
+ - W_ASSIGNINT: new word flag; used internally for make_internal_declare
+ and set by fix_assignment_words
+
+execute_cmd.c
+ - fix_assignment_words: set W_ASSIGNINT if compound assignment and -i
+ given as option
+
+subst.c
+ - shell_expand_word_list: rework the way the option list that is
+ passed to make_internal_declare is created
tests/array12.sub f
tests/array13.sub f
tests/array14.sub f
+tests/array15.sub f
tests/array-at-star f
tests/array2.right f
tests/assoc.tests f
--- /dev/null
+#
+# Master distribution manifest for bash
+#
+#
+# Filename type
+#
+CWRU d
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+builtins d
+cross-build d
+doc d
+examples d
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+#examples/startup-files/apple d
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+support d
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+tests/misc d
+ABOUT-NLS f
+ChangeLog s CWRU/changelog
+CHANGES f
+COMPAT f
+COPYING f
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+examples/functions/seq f
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+examples/functions/shcat f
+examples/functions/shcat2 f
+examples/functions/sort-pos-params f
+#examples/functions/sqroot f
+examples/functions/substr f
+examples/functions/substr2 f
+#examples/functions/term f
+examples/functions/whatis f
+examples/functions/whence f
+examples/functions/which f
+#examples/functions/xalias.bash f
+#examples/functions/xfind.bash f
+#examples/scripts/adventure.sh f
+#examples/scripts/bash-hexdump.sh f
+#examples/scripts/bcsh.sh f
+examples/scripts/cat.sh f
+examples/scripts/center f
+#examples/scripts/dd-ex.sh f
+#examples/scripts/fixfiles.bash f
+#examples/scripts/hanoi.bash f
+examples/scripts/inpath f
+#examples/scripts/krand.bash f
+#examples/scripts/line-input.bash f
+#examples/scripts/nohup.bash f
+#examples/scripts/precedence f
+#examples/scripts/randomcard.bash f
+#examples/scripts/scrollbar f
+#examples/scripts/scrollbar2 f
+#examples/scripts/self-repro f
+#examples/scripts/showperm.bash f
+examples/scripts/shprompt f
+examples/scripts/spin.bash f
+#examples/scripts/timeout f
+#examples/scripts/timeout2 f
+#examples/scripts/timeout3 f
+#examples/scripts/vtree2 f
+#examples/scripts/vtree3 f
+#examples/scripts/vtree3a f
+#examples/scripts/websrv.sh f
+examples/scripts/xterm_title f
+examples/scripts/zprintf f
+examples/startup-files/README f
+examples/startup-files/Bashrc.bfox f
+examples/startup-files/Bash_aliases f
+examples/startup-files/Bash_profile f
+examples/startup-files/bash-profile f
+examples/startup-files/bashrc f
+#examples/startup-files/apple/README f
+#examples/startup-files/apple/aliases f
+#examples/startup-files/apple/bash.defaults f
+#examples/startup-files/apple/environment f
+#examples/startup-files/apple/login f
+#examples/startup-files/apple/logout f
+#examples/startup-files/apple/rc f
+#examples/misc/suncmd.termcap f
+examples/misc/aliasconv.sh f
+examples/misc/aliasconv.bash f
+examples/misc/cshtobash f
+tests/README f
+tests/COPYRIGHT f
+tests/alias.tests f
+tests/alias1.sub f
+tests/alias.right f
+tests/appendop.tests f
+tests/appendop1.sub f
+tests/appendop2.sub f
+tests/appendop.right f
+tests/arith-for.tests f
+tests/arith-for.right f
+tests/arith.tests f
+tests/arith.right f
+tests/arith1.sub f
+tests/arith2.sub f
+tests/arith3.sub f
+tests/arith4.sub f
+tests/arith5.sub f
+tests/arith6.sub f
+tests/array.tests f
+tests/array.right f
+tests/array1.sub f
+tests/array2.sub f
+tests/array3.sub f
+tests/array4.sub f
+tests/array5.sub f
+tests/array6.sub f
+tests/array7.sub f
+tests/array8.sub f
+tests/array9.sub f
+tests/array10.sub f
+tests/array11.sub f
+tests/array12.sub f
+tests/array13.sub f
+tests/array14.sub f
+tests/array-at-star f
+tests/array2.right f
+tests/assoc.tests f
+tests/assoc.right f
+tests/assoc1.sub f
+tests/assoc2.sub f
+tests/assoc3.sub f
+tests/assoc4.sub f
+tests/assoc5.sub f
+tests/assoc6.sub f
+tests/assoc7.sub f
+tests/braces.tests f
+tests/braces.right f
+tests/builtins.tests f
+tests/builtins.right f
+tests/builtins1.sub f
+tests/builtins2.sub f
+tests/builtins3.sub f
+tests/builtins4.sub f
+tests/source1.sub f
+tests/source2.sub f
+tests/source3.sub f
+tests/source4.sub f
+tests/source5.sub f
+tests/source6.sub f
+tests/case.tests f
+tests/case.right f
+tests/case1.sub f
+tests/casemod.tests f
+tests/casemod.right f
+tests/comsub.tests f
+tests/comsub.right f
+tests/comsub1.sub f
+tests/comsub-eof.tests f
+tests/comsub-eof0.sub f
+tests/comsub-eof1.sub f
+tests/comsub-eof2.sub f
+tests/comsub-eof3.sub f
+tests/comsub-eof4.sub f
+tests/comsub-eof5.sub f
+tests/comsub-eof.right f
+tests/comsub-posix.tests f
+tests/comsub-posix.right f
+tests/comsub-posix1.sub f
+tests/comsub-posix2.sub f
+tests/comsub-posix3.sub f
+tests/cond.tests f
+tests/cond.right f
+tests/cond-regexp1.sub f
+tests/cond-regexp2.sub f
+tests/coproc.tests f
+tests/coproc.right f
+tests/cprint.tests f
+tests/cprint.right f
+tests/dbg-support.right f
+tests/dbg-support.sub f
+tests/dbg-support.tests f
+tests/dbg-support2.right f
+tests/dbg-support2.tests f
+tests/dbg-support3.sub f
+tests/dollar-at-star f
+tests/dollar-at-star1.sub f
+tests/dollar-at1.sub f
+tests/dollar-at2.sub f
+tests/dollar-at3.sub f
+tests/dollar-at4.sub f
+tests/dollar-at5.sub f
+tests/dollar-star1.sub f
+tests/dollar-star2.sub f
+tests/dollar-star3.sub f
+tests/dollar-star4.sub f
+tests/dollar-star5.sub f
+tests/dollar-star6.sub f
+tests/dollar-star7.sub f
+tests/dollar.right f
+tests/dstack.tests f
+tests/dstack.right f
+tests/dstack2.tests f
+tests/dstack2.right f
+tests/errors.tests f
+tests/errors.right f
+tests/errors1.sub f
+tests/errors2.sub f
+tests/execscript f
+tests/exec.right f
+tests/exec1.sub f 755
+tests/exec2.sub f
+tests/exec3.sub f
+tests/exec4.sub f
+tests/exec5.sub f
+tests/exec6.sub f
+tests/exec7.sub f
+tests/exec8.sub f
+tests/exec9.sub f
+tests/exp.tests f
+tests/exp.right f
+tests/exp1.sub f
+tests/exp2.sub f
+tests/exp3.sub f
+tests/exp4.sub f
+tests/exp5.sub f
+tests/exp6.sub f
+tests/extglob.tests f
+tests/extglob.right f
+tests/extglob1.sub f
+tests/extglob1a.sub f
+tests/extglob2.tests f
+tests/extglob2.right f
+tests/extglob3.tests f
+tests/extglob3.right f
+tests/func.tests f
+tests/func.right f
+tests/func1.sub f
+tests/func2.sub f
+tests/func3.sub f
+tests/func4.sub f
+tests/getopts.tests f
+tests/getopts.right f
+tests/getopts1.sub f
+tests/getopts2.sub f
+tests/getopts3.sub f
+tests/getopts4.sub f
+tests/getopts5.sub f
+tests/getopts6.sub f
+tests/getopts7.sub f
+tests/glob.tests f
+tests/glob1.sub f
+tests/glob.right f
+tests/globstar.tests f
+tests/globstar.right f
+tests/globstar1.sub f
+tests/globstar2.sub f
+tests/heredoc.tests f
+tests/heredoc.right f
+tests/heredoc1.sub f
+tests/heredoc2.sub f
+tests/heredoc3.sub f
+tests/herestr.tests f
+tests/herestr.right f
+tests/histexp.tests f
+tests/histexp.right f
+tests/history.tests f
+tests/history.right f
+tests/history.list f 444
+tests/history1.sub f
+tests/history2.sub f
+tests/ifs.tests f
+tests/ifs.right f
+tests/ifs-posix.tests f
+tests/ifs-posix.right f
+tests/input-line.sh f
+tests/input-line.sub f
+tests/input.right f
+tests/intl.tests f
+tests/intl1.sub f
+tests/intl2.sub f
+tests/intl.right f
+tests/iquote.tests f
+tests/iquote.right f
+tests/iquote1.sub f
+tests/invert.tests f
+tests/invert.right f
+tests/jobs.tests f
+tests/jobs1.sub f
+tests/jobs2.sub f
+tests/jobs3.sub f
+tests/jobs4.sub f
+tests/jobs5.sub f
+tests/jobs.right f
+tests/lastpipe.right f
+tests/lastpipe.tests f
+tests/lastpipe1.sub f
+tests/mapfile.data f
+tests/mapfile.right f
+tests/mapfile.tests f
+tests/mapfile1.sub f
+tests/more-exp.tests f
+tests/more-exp.right f
+tests/nameref.tests f
+tests/nameref1.sub f
+tests/nameref2.sub f
+tests/nameref3.sub f
+tests/nameref4.sub f
+tests/nameref5.sub f
+tests/nameref6.sub f
+tests/nameref.right f
+tests/new-exp.tests f
+tests/new-exp1.sub f
+tests/new-exp2.sub f
+tests/new-exp3.sub f
+tests/new-exp4.sub f
+tests/new-exp5.sub f
+tests/new-exp6.sub f
+tests/new-exp7.sub f
+tests/new-exp8.sub f
+tests/new-exp9.sub f
+tests/new-exp.right f
+tests/nquote.tests f
+tests/nquote.right f
+tests/nquote1.sub f
+tests/nquote2.sub f
+tests/nquote1.tests f
+tests/nquote1.right f
+tests/nquote2.tests f
+tests/nquote2.right f
+tests/nquote3.tests f
+tests/nquote3.right f
+tests/nquote4.tests f
+tests/nquote4.right f
+tests/nquote5.tests f
+tests/nquote5.right f
+tests/posix2.tests f
+tests/posix2.right f
+tests/posixexp.tests f
+tests/posixexp.right f
+tests/posixexp1.sub f
+tests/posixexp2.sub f
+tests/posixexp2.tests f
+tests/posixexp2.right f
+tests/posixpat.tests f
+tests/posixpat.right f
+tests/posixpipe.tests f
+tests/posixpipe.right f
+tests/prec.right f
+tests/precedence f
+tests/printf.tests f
+tests/printf.right f
+tests/printf1.sub f
+tests/printf2.sub f
+tests/printf3.sub f
+tests/printf4.sub f
+tests/quote.tests f
+tests/quote.right f
+tests/quote1.sub f
+tests/read.tests f
+tests/read.right f
+tests/read1.sub f
+tests/read2.sub f
+tests/read3.sub f
+tests/read4.sub f
+tests/read5.sub f
+tests/read6.sub f
+tests/redir.tests f
+tests/redir.right f
+tests/redir1.sub f
+tests/redir2.sub f
+tests/redir3.sub f
+tests/redir3.in1 f
+tests/redir3.in2 f
+tests/redir4.sub f
+tests/redir4.in1 f
+tests/redir5.sub f
+tests/redir6.sub f
+tests/redir7.sub f
+tests/redir8.sub f
+tests/redir9.sub f
+tests/redir10.sub f
+tests/rhs-exp.tests f
+tests/rhs-exp.right f
+tests/rhs-exp1.sub f
+tests/rsh.tests f
+tests/rsh.right f
+tests/run-all f
+tests/run-minimal f
+tests/run-alias f
+tests/run-appendop f
+tests/run-arith-for f
+tests/run-arith f
+tests/run-array f
+tests/run-array2 f
+tests/run-assoc f
+tests/run-braces f
+tests/run-builtins f
+tests/run-case f
+tests/run-casemod f
+tests/run-comsub f
+tests/run-comsub-eof f
+tests/run-comsub-posix f
+tests/run-cond f
+tests/run-coproc f
+tests/run-cprint f
+tests/run-dbg-support f
+tests/run-dbg-support2 f
+tests/run-dirstack f
+tests/run-dollars f
+tests/run-errors f
+tests/run-execscript f
+tests/run-exp-tests f
+tests/run-extglob f
+tests/run-extglob2 f
+tests/run-extglob3 f
+tests/run-func f
+tests/run-getopts f
+tests/run-glob-test f
+tests/run-globstar f
+tests/run-heredoc f
+tests/run-herestr f
+tests/run-histexpand f
+tests/run-history f
+tests/run-ifs f
+tests/run-ifs-posix f
+tests/run-input-test f
+tests/run-intl f
+tests/run-iquote f
+tests/run-invert f
+tests/run-jobs f
+tests/run-lastpipe f
+tests/run-mapfile f
+tests/run-more-exp f
+tests/run-nameref f
+tests/run-new-exp f
+tests/run-nquote f
+tests/run-nquote1 f
+tests/run-nquote2 f
+tests/run-nquote3 f
+tests/run-nquote4 f
+tests/run-nquote5 f
+tests/run-posix2 f
+tests/run-posixexp f
+tests/run-posixexp2 f
+tests/run-posixpat f
+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-e3.sub f
+tests/set-e3a.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/trap4.sub f
+tests/trap5.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/unicode1.sub f
+tests/unicode2.sub f
+tests/varenv.right f
+tests/varenv.sh f
+tests/varenv1.sub f
+tests/varenv2.sub f
+tests/varenv3.sub f
+tests/varenv4.sub f
+tests/varenv5.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
hh. Shells started to run process substitutions now run any trap set on EXIT.
+ii. There is now a configure-time option to enable the globasciiranges option
+ by default.
+
+jj. The read builtin now checks its first variable argument for validity before
+ trying to read any input.
+
2. New Features in Readline
a. Readline is now more responsive to SIGHUP and other fatal signals when
n. New application-settable variable: rl_signal_event_hook; function that is
called when readline is reading terminal input and read(2) is interrupted
by a signal. Currently not called for SIGHUP or SIGTERM.
-
#define W_ARRAYIND 0x1000000 /* word is an array index being expanded */
#define W_ASSNGLOBAL 0x2000000 /* word is a global assignment to declare (declare/typeset -g) */
#define W_NOBRACE 0x4000000 /* Don't perform brace expansion */
+#define W_ASSIGNINT 0x8000000 /* word is an integer assignment to declare */
/* Possible values for subshell_environment */
#define SUBSHELL_ASYNC 0x01 /* subshell caused by `command &' */
--- /dev/null
+/* command.h -- The structures used internally to represent commands, and
+ the extern declarations of the functions used to create them. */
+
+/* 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 (_COMMAND_H_)
+#define _COMMAND_H_
+
+#include "stdc.h"
+
+/* Instructions describing what kind of thing to do for a redirection. */
+enum r_instruction {
+ r_output_direction, r_input_direction, r_inputa_direction,
+ r_appending_to, r_reading_until, r_reading_string,
+ r_duplicating_input, r_duplicating_output, r_deblank_reading_until,
+ r_close_this, r_err_and_out, r_input_output, r_output_force,
+ r_duplicating_input_word, r_duplicating_output_word,
+ r_move_input, r_move_output, r_move_input_word, r_move_output_word,
+ r_append_err_and_out
+};
+
+/* Redirection flags; values for rflags */
+#define REDIR_VARASSIGN 0x01
+
+/* Redirection errors. */
+#define AMBIGUOUS_REDIRECT -1
+#define NOCLOBBER_REDIRECT -2
+#define RESTRICTED_REDIRECT -3 /* can only happen in restricted shells. */
+#define HEREDOC_REDIRECT -4 /* here-doc temp file can't be created */
+#define BADVAR_REDIRECT -5 /* something wrong with {varname}redir */
+
+#define CLOBBERING_REDIRECT(ri) \
+ (ri == r_output_direction || ri == r_err_and_out)
+
+#define OUTPUT_REDIRECT(ri) \
+ (ri == r_output_direction || ri == r_input_output || ri == r_err_and_out || ri == r_append_err_and_out)
+
+#define INPUT_REDIRECT(ri) \
+ (ri == r_input_direction || ri == r_inputa_direction || ri == r_input_output)
+
+#define WRITE_REDIRECT(ri) \
+ (ri == r_output_direction || \
+ ri == r_input_output || \
+ ri == r_err_and_out || \
+ ri == r_appending_to || \
+ ri == r_append_err_and_out || \
+ ri == r_output_force)
+
+/* redirection needs translation */
+#define TRANSLATE_REDIRECT(ri) \
+ (ri == r_duplicating_input_word || ri == r_duplicating_output_word || \
+ ri == r_move_input_word || ri == r_move_output_word)
+
+/* Command Types: */
+enum command_type { cm_for, cm_case, cm_while, cm_if, cm_simple, cm_select,
+ cm_connection, cm_function_def, cm_until, cm_group,
+ cm_arith, cm_cond, cm_arith_for, cm_subshell, cm_coproc };
+
+/* Possible values for the `flags' field of a WORD_DESC. */
+#define W_HASDOLLAR 0x000001 /* Dollar sign present. */
+#define W_QUOTED 0x000002 /* Some form of quote character is present. */
+#define W_ASSIGNMENT 0x000004 /* This word is a variable assignment. */
+#define W_SPLITSPACE 0x000008 /* Split this word on " " regardless of IFS */
+#define W_NOSPLIT 0x000010 /* Do not perform word splitting on this word because ifs is empty string. */
+#define W_NOGLOB 0x000020 /* Do not perform globbing on this word. */
+#define W_NOSPLIT2 0x000040 /* Don't split word except for $@ expansion (using spaces) because context does not allow it. */
+#define W_TILDEEXP 0x000080 /* Tilde expand this assignment word */
+#define W_DOLLARAT 0x000100 /* $@ and its special handling */
+#define W_DOLLARSTAR 0x000200 /* $* and its special handling */
+#define W_NOCOMSUB 0x000400 /* Don't perform command substitution on this word */
+#define W_ASSIGNRHS 0x000800 /* Word is rhs of an assignment statement */
+#define W_NOTILDE 0x001000 /* Don't perform tilde expansion on this word */
+#define W_ITILDE 0x002000 /* Internal flag for word expansion */
+#define W_NOEXPAND 0x004000 /* Don't expand at all -- do quote removal */
+#define W_COMPASSIGN 0x008000 /* Compound assignment */
+#define W_ASSNBLTIN 0x010000 /* word is a builtin command that takes assignments */
+#define W_ASSIGNARG 0x020000 /* word is assignment argument to command */
+#define W_HASQUOTEDNULL 0x040000 /* word contains a quoted null character */
+#define W_DQUOTE 0x080000 /* word should be treated as if double-quoted */
+#define W_NOPROCSUB 0x100000 /* don't perform process substitution */
+#define W_HASCTLESC 0x200000 /* word contains literal CTLESC characters */
+#define W_ASSIGNASSOC 0x400000 /* word looks like associative array assignment */
+#define W_ASSIGNARRAY 0x800000 /* word looks like a compound indexed array assignment */
+#define W_ARRAYIND 0x1000000 /* word is an array index being expanded */
+#define W_ASSNGLOBAL 0x2000000 /* word is a global assignment to declare (declare/typeset -g) */
+#define W_NOBRACE 0x4000000 /* Don't perform brace expansion */
+
+/* Possible values for subshell_environment */
+#define SUBSHELL_ASYNC 0x01 /* subshell caused by `command &' */
+#define SUBSHELL_PAREN 0x02 /* subshell caused by ( ... ) */
+#define SUBSHELL_COMSUB 0x04 /* subshell caused by `command` or $(command) */
+#define SUBSHELL_FORK 0x08 /* subshell caused by executing a disk command */
+#define SUBSHELL_PIPE 0x10 /* subshell from a pipeline element */
+#define SUBSHELL_PROCSUB 0x20 /* subshell caused by <(command) or >(command) */
+#define SUBSHELL_COPROC 0x40 /* subshell from a coproc pipeline */
+#define SUBSHELL_RESETTRAP 0x80 /* subshell needs to reset trap strings on first call to trap */
+
+/* A structure which represents a word. */
+typedef struct word_desc {
+ char *word; /* Zero terminated string. */
+ int flags; /* Flags associated with this word. */
+} WORD_DESC;
+
+/* A linked list of words. */
+typedef struct word_list {
+ struct word_list *next;
+ WORD_DESC *word;
+} WORD_LIST;
+
+
+/* **************************************************************** */
+/* */
+/* Shell Command Structs */
+/* */
+/* **************************************************************** */
+
+/* What a redirection descriptor looks like. If the redirection instruction
+ is ri_duplicating_input or ri_duplicating_output, use DEST, otherwise
+ use the file in FILENAME. Out-of-range descriptors are identified by a
+ negative DEST. */
+
+typedef union {
+ int dest; /* Place to redirect REDIRECTOR to, or ... */
+ WORD_DESC *filename; /* filename to redirect to. */
+} REDIRECTEE;
+
+/* Structure describing a redirection. If REDIRECTOR is negative, the parser
+ (or translator in redir.c) encountered an out-of-range file descriptor. */
+typedef struct redirect {
+ struct redirect *next; /* Next element, or NULL. */
+ REDIRECTEE redirector; /* Descriptor or varname to be redirected. */
+ int rflags; /* Private flags for this redirection */
+ int flags; /* Flag value for `open'. */
+ enum r_instruction instruction; /* What to do with the information. */
+ REDIRECTEE redirectee; /* File descriptor or filename */
+ char *here_doc_eof; /* The word that appeared in <<foo. */
+} REDIRECT;
+
+/* An element used in parsing. A single word or a single redirection.
+ This is an ephemeral construct. */
+typedef struct element {
+ WORD_DESC *word;
+ REDIRECT *redirect;
+} ELEMENT;
+
+/* Possible values for command->flags. */
+#define CMD_WANT_SUBSHELL 0x01 /* User wants a subshell: ( command ) */
+#define CMD_FORCE_SUBSHELL 0x02 /* Shell needs to force a subshell. */
+#define CMD_INVERT_RETURN 0x04 /* Invert the exit value. */
+#define CMD_IGNORE_RETURN 0x08 /* Ignore the exit value. For set -e. */
+#define CMD_NO_FUNCTIONS 0x10 /* Ignore functions during command lookup. */
+#define CMD_INHIBIT_EXPANSION 0x20 /* Do not expand the command words. */
+#define CMD_NO_FORK 0x40 /* Don't fork; just call execve */
+#define CMD_TIME_PIPELINE 0x80 /* Time a pipeline */
+#define CMD_TIME_POSIX 0x100 /* time -p; use POSIX.2 time output spec. */
+#define CMD_AMPERSAND 0x200 /* command & */
+#define CMD_STDIN_REDIR 0x400 /* async command needs implicit </dev/null */
+#define CMD_COMMAND_BUILTIN 0x0800 /* command executed by `command' builtin */
+#define CMD_COPROC_SUBSHELL 0x1000
+#define CMD_LASTPIPE 0x2000
+
+/* What a command looks like. */
+typedef struct command {
+ enum command_type type; /* FOR CASE WHILE IF CONNECTION or SIMPLE. */
+ int flags; /* Flags controlling execution environment. */
+ int line; /* line number the command starts on */
+ REDIRECT *redirects; /* Special redirects for FOR CASE, etc. */
+ union {
+ struct for_com *For;
+ struct case_com *Case;
+ struct while_com *While;
+ struct if_com *If;
+ struct connection *Connection;
+ struct simple_com *Simple;
+ struct function_def *Function_def;
+ struct group_com *Group;
+#if defined (SELECT_COMMAND)
+ struct select_com *Select;
+#endif
+#if defined (DPAREN_ARITHMETIC)
+ struct arith_com *Arith;
+#endif
+#if defined (COND_COMMAND)
+ struct cond_com *Cond;
+#endif
+#if defined (ARITH_FOR_COMMAND)
+ struct arith_for_com *ArithFor;
+#endif
+ struct subshell_com *Subshell;
+ struct coproc_com *Coproc;
+ } value;
+} COMMAND;
+
+/* Structure used to represent the CONNECTION type. */
+typedef struct connection {
+ int ignore; /* Unused; simplifies make_command (). */
+ COMMAND *first; /* Pointer to the first command. */
+ COMMAND *second; /* Pointer to the second command. */
+ int connector; /* What separates this command from others. */
+} CONNECTION;
+
+/* Structures used to represent the CASE command. */
+
+/* Values for FLAGS word in a PATTERN_LIST */
+#define CASEPAT_FALLTHROUGH 0x01
+#define CASEPAT_TESTNEXT 0x02
+
+/* Pattern/action structure for CASE_COM. */
+typedef struct pattern_list {
+ struct pattern_list *next; /* Clause to try in case this one failed. */
+ WORD_LIST *patterns; /* Linked list of patterns to test. */
+ COMMAND *action; /* Thing to execute if a pattern matches. */
+ int flags;
+} PATTERN_LIST;
+
+/* The CASE command. */
+typedef struct case_com {
+ int flags; /* See description of CMD flags. */
+ int line; /* line number the `case' keyword appears on */
+ WORD_DESC *word; /* The thing to test. */
+ PATTERN_LIST *clauses; /* The clauses to test against, or NULL. */
+} CASE_COM;
+
+/* FOR command. */
+typedef struct for_com {
+ int flags; /* See description of CMD flags. */
+ int line; /* line number the `for' keyword appears on */
+ WORD_DESC *name; /* The variable name to get mapped over. */
+ WORD_LIST *map_list; /* The things to map over. This is never NULL. */
+ COMMAND *action; /* The action to execute.
+ During execution, NAME is bound to successive
+ members of MAP_LIST. */
+} FOR_COM;
+
+#if defined (ARITH_FOR_COMMAND)
+typedef struct arith_for_com {
+ int flags;
+ int line; /* generally used for error messages */
+ WORD_LIST *init;
+ WORD_LIST *test;
+ WORD_LIST *step;
+ COMMAND *action;
+} ARITH_FOR_COM;
+#endif
+
+#if defined (SELECT_COMMAND)
+/* KSH SELECT command. */
+typedef struct select_com {
+ int flags; /* See description of CMD flags. */
+ int line; /* line number the `select' keyword appears on */
+ WORD_DESC *name; /* The variable name to get mapped over. */
+ WORD_LIST *map_list; /* The things to map over. This is never NULL. */
+ COMMAND *action; /* The action to execute.
+ During execution, NAME is bound to the member of
+ MAP_LIST chosen by the user. */
+} SELECT_COM;
+#endif /* SELECT_COMMAND */
+
+/* IF command. */
+typedef struct if_com {
+ int flags; /* See description of CMD flags. */
+ COMMAND *test; /* Thing to test. */
+ COMMAND *true_case; /* What to do if the test returned non-zero. */
+ COMMAND *false_case; /* What to do if the test returned zero. */
+} IF_COM;
+
+/* WHILE command. */
+typedef struct while_com {
+ int flags; /* See description of CMD flags. */
+ COMMAND *test; /* Thing to test. */
+ COMMAND *action; /* Thing to do while test is non-zero. */
+} WHILE_COM;
+
+#if defined (DPAREN_ARITHMETIC)
+/* The arithmetic evaluation command, ((...)). Just a set of flags and
+ a WORD_LIST, of which the first element is the only one used, for the
+ time being. */
+typedef struct arith_com {
+ int flags;
+ int line;
+ WORD_LIST *exp;
+} ARITH_COM;
+#endif /* DPAREN_ARITHMETIC */
+
+/* The conditional command, [[...]]. This is a binary tree -- we slippped
+ a recursive-descent parser into the YACC grammar to parse it. */
+#define COND_AND 1
+#define COND_OR 2
+#define COND_UNARY 3
+#define COND_BINARY 4
+#define COND_TERM 5
+#define COND_EXPR 6
+
+typedef struct cond_com {
+ int flags;
+ int line;
+ int type;
+ WORD_DESC *op;
+ struct cond_com *left, *right;
+} COND_COM;
+
+/* The "simple" command. Just a collection of words and redirects. */
+typedef struct simple_com {
+ int flags; /* See description of CMD flags. */
+ int line; /* line number the command starts on */
+ WORD_LIST *words; /* The program name, the arguments,
+ variable assignments, etc. */
+ REDIRECT *redirects; /* Redirections to perform. */
+} SIMPLE_COM;
+
+/* The "function definition" command. */
+typedef struct function_def {
+ int flags; /* See description of CMD flags. */
+ int line; /* Line number the function def starts on. */
+ WORD_DESC *name; /* The name of the function. */
+ COMMAND *command; /* The parsed execution tree. */
+ char *source_file; /* file in which function was defined, if any */
+} FUNCTION_DEF;
+
+/* A command that is `grouped' allows pipes and redirections to affect all
+ commands in the group. */
+typedef struct group_com {
+ int ignore; /* See description of CMD flags. */
+ COMMAND *command;
+} GROUP_COM;
+
+typedef struct subshell_com {
+ int flags;
+ COMMAND *command;
+} SUBSHELL_COM;
+
+#define COPROC_RUNNING 0x01
+#define COPROC_DEAD 0x02
+
+typedef struct coproc {
+ char *c_name;
+ pid_t c_pid;
+ int c_rfd;
+ int c_wfd;
+ int c_rsave;
+ int c_wsave;
+ int c_flags;
+ int c_status;
+ int c_lock;
+} Coproc;
+
+typedef struct coproc_com {
+ int flags;
+ char *name;
+ COMMAND *command;
+} COPROC_COM;
+
+extern COMMAND *global_command;
+extern Coproc sh_coproc;
+
+/* Possible command errors */
+#define CMDERR_DEFAULT 0
+#define CMDERR_BADTYPE 1
+#define CMDERR_BADCONN 2
+#define CMDERR_BADJUMP 3
+
+#define CMDERR_LAST 3
+
+/* Forward declarations of functions declared in copy_cmd.c. */
+
+extern FUNCTION_DEF *copy_function_def_contents __P((FUNCTION_DEF *, FUNCTION_DEF *));
+extern FUNCTION_DEF *copy_function_def __P((FUNCTION_DEF *));
+
+extern WORD_DESC *copy_word __P((WORD_DESC *));
+extern WORD_LIST *copy_word_list __P((WORD_LIST *));
+extern REDIRECT *copy_redirect __P((REDIRECT *));
+extern REDIRECT *copy_redirects __P((REDIRECT *));
+extern COMMAND *copy_command __P((COMMAND *));
+
+#endif /* _COMMAND_H_ */
--- /dev/null
+*** ../bash-4.2-patched/lib/readline/readline.c 2010-07-25 17:07:40.000000000 -0400
+--- lib/readline/readline.c 2013-07-21 15:52:16.000000000 -0400
+***************
+*** 2,6 ****
+ with emacs style editing and completion. */
+
+! /* Copyright (C) 1987-2009 Free Software Foundation, Inc.
+
+ This file is part of the GNU Readline Library (Readline), a library
+--- 2,6 ----
+ with emacs style editing and completion. */
+
+! /* Copyright (C) 1987-2013 Free Software Foundation, Inc.
+
+ This file is part of the GNU Readline Library (Readline), a library
+***************
+*** 113,117 ****
+ Keymap _rl_keymap = emacs_standard_keymap;
+
+-
+ /* The current style of editing. */
+ int rl_editing_mode = emacs_mode;
+--- 113,116 ----
+***************
+*** 246,249 ****
+--- 245,267 ----
+ _rl_keyseq_cxt *_rl_kscxt = 0;
+
++ int rl_executing_key;
++ char *rl_executing_keyseq = 0;
++ int _rl_executing_keyseq_size = 0;
++
++ /* Timeout (specified in milliseconds) when reading characters making up an
++ ambiguous multiple-key sequence */
++ int _rl_keyseq_timeout = 500;
++
++ #define RESIZE_KEYSEQ_BUFFER() \
++ do \
++ { \
++ if (rl_key_sequence_length + 2 >= _rl_executing_keyseq_size) \
++ { \
++ _rl_executing_keyseq_size += 16; \
++ rl_executing_keyseq = xrealloc (rl_executing_keyseq, _rl_executing_keyseq_size); \
++ } \
++ } \
++ while (0);
++
+ /* Forward declarations used by the display, termcap, and history code. */
+
+***************
+*** 280,283 ****
+--- 298,305 ----
+ int _rl_echo_control_chars = 1;
+
++ /* Non-zero means to prefix the displayed prompt with a character indicating
++ the editing mode: @ for emacs, : for vi-command, + for vi-insert. */
++ int _rl_show_mode_in_prompt = 0;
++
+ /* **************************************************************** */
+ /* */
+***************
+*** 353,356 ****
+--- 375,383 ----
+ #endif
+
++ #if HAVE_DECL_AUDIT_TTY && defined (ENABLE_TTY_AUDIT_SUPPORT)
++ if (value)
++ _rl_audit_tty (value);
++ #endif
++
+ return (value);
+ }
+***************
+*** 370,376 ****
+--- 397,413 ----
+ _rl_out_stream = rl_outstream;
+
++ /* Enable the meta key only for the duration of readline(), if this
++ terminal has one and the terminal has been initialized */
++ if (_rl_enable_meta & RL_ISSTATE (RL_STATE_TERMPREPPED))
++ _rl_enable_meta_key ();
++
+ if (rl_startup_hook)
+ (*rl_startup_hook) ();
+
++ #if defined (VI_MODE)
++ if (rl_editing_mode == vi_mode)
++ rl_vi_insertion_mode (1, 'i'); /* don't want to reset last */
++ #endif /* VI_MODE */
++
+ /* If we're not echoing, we still want to at least print a prompt, because
+ rl_redisplay will not do it for us. If the calling application has a
+***************
+*** 395,403 ****
+ }
+
+- #if defined (VI_MODE)
+- if (rl_editing_mode == vi_mode)
+- rl_vi_insert_mode (1, 'i');
+- #endif /* VI_MODE */
+-
+ if (rl_pre_input_hook)
+ (*rl_pre_input_hook) ();
+--- 432,435 ----
+***************
+*** 438,441 ****
+--- 470,478 ----
+ rl_free_undo_list ();
+
++ /* Disable the meta key, if this terminal has one and we were told to use it.
++ The check whether or not we sent the enable string is in
++ _rl_disable_meta_key(); the flag is set in _rl_enable_meta_key */
++ _rl_disable_meta_key ();
++
+ /* Restore normal cursor, if available. */
+ _rl_set_insert_mode (RL_IM_INSERT, 0);
+***************
+*** 493,497 ****
+--- 530,538 ----
+ lk = _rl_last_command_was_kill;
+
++ #if defined (HAVE_POSIX_SIGSETJMP)
++ code = sigsetjmp (_rl_top_level, 0);
++ #else
+ code = setjmp (_rl_top_level);
++ #endif
+
+ if (code)
+***************
+*** 512,515 ****
+--- 553,557 ----
+ _rl_reset_argument ();
+ rl_key_sequence_length = 0;
++ rl_executing_keyseq[0] = 0;
+ }
+
+***************
+*** 520,524 ****
+ /* look at input.c:rl_getc() for the circumstances under which this will
+ be returned; punt immediately on read error without converting it to
+! a newline. */
+ if (c == READERR)
+ {
+--- 562,567 ----
+ /* look at input.c:rl_getc() for the circumstances under which this will
+ be returned; punt immediately on read error without converting it to
+! a newline; assume that rl_read_key has already called the signal
+! handler. */
+ if (c == READERR)
+ {
+***************
+*** 532,536 ****
+ }
+
+! /* EOF typed to a non-blank line is a <NL>. */
+ if (c == EOF && rl_end)
+ c = NEWLINE;
+--- 575,581 ----
+ }
+
+! /* EOF typed to a non-blank line is a <NL>. If we want to change this,
+! to force any existing line to be ignored when read(2) reads EOF,
+! for example, this is the place to change. */
+ if (c == EOF && rl_end)
+ c = NEWLINE;
+***************
+*** 744,750 ****
+ if (RL_ISSTATE (RL_STATE_MACRODEF))
+ _rl_add_macro_char (ESC);
+ map = FUNCTION_TO_KEYMAP (map, ESC);
+ key = UNMETA (key);
+- rl_key_sequence_length += 2;
+ return (_rl_dispatch (key, map));
+ }
+--- 789,796 ----
+ if (RL_ISSTATE (RL_STATE_MACRODEF))
+ _rl_add_macro_char (ESC);
++ RESIZE_KEYSEQ_BUFFER ();
++ rl_executing_keyseq[rl_key_sequence_length++] = ESC;
+ map = FUNCTION_TO_KEYMAP (map, ESC);
+ key = UNMETA (key);
+ return (_rl_dispatch (key, map));
+ }
+***************
+*** 766,776 ****
+ /* Special case rl_do_lowercase_version (). */
+ if (func == rl_do_lowercase_version)
+ return (_rl_dispatch (_rl_to_lower (key), map));
+
+ rl_executing_keymap = map;
+
+ rl_dispatching = 1;
+ RL_SETSTATE(RL_STATE_DISPATCHING);
+! (*map[key].function)(rl_numeric_arg * rl_arg_sign, key);
+ RL_UNSETSTATE(RL_STATE_DISPATCHING);
+ rl_dispatching = 0;
+--- 812,828 ----
+ /* Special case rl_do_lowercase_version (). */
+ if (func == rl_do_lowercase_version)
++ /* Should we do anything special if key == ANYOTHERKEY? */
+ return (_rl_dispatch (_rl_to_lower (key), map));
+
+ rl_executing_keymap = map;
++ rl_executing_key = key;
++
++ RESIZE_KEYSEQ_BUFFER();
++ rl_executing_keyseq[rl_key_sequence_length++] = key;
++ rl_executing_keyseq[rl_key_sequence_length] = '\0';
+
+ rl_dispatching = 1;
+ RL_SETSTATE(RL_STATE_DISPATCHING);
+! r = (*func) (rl_numeric_arg * rl_arg_sign, key);
+ RL_UNSETSTATE(RL_STATE_DISPATCHING);
+ rl_dispatching = 0;
+***************
+*** 789,793 ****
+ shadow function that was overridden when the current keymap
+ was created. Return -2 to note that. */
+! _rl_unget_char (key);
+ return -2;
+ }
+--- 841,848 ----
+ shadow function that was overridden when the current keymap
+ was created. Return -2 to note that. */
+! if (RL_ISSTATE (RL_STATE_MACROINPUT))
+! _rl_prev_macro_key ();
+! else
+! _rl_unget_char (key);
+ return -2;
+ }
+***************
+*** 798,802 ****
+ we need to back up the recursion chain and find the last
+ subsequence that is bound to a function. */
+! _rl_unget_char (key);
+ return -1;
+ }
+--- 853,860 ----
+ we need to back up the recursion chain and find the last
+ subsequence that is bound to a function. */
+! if (RL_ISSTATE (RL_STATE_MACROINPUT))
+! _rl_prev_macro_key ();
+! else
+! _rl_unget_char (key);
+ return -1;
+ }
+***************
+*** 821,831 ****
+ will be if an arrow key has been pressed, and, if there's not,
+ just dispatch to (what we assume is) rl_vi_movement_mode right
+! away. This is essentially an input test with a zero timeout. */
+ if (rl_editing_mode == vi_mode && key == ESC && map == vi_insertion_keymap
+! && _rl_input_queued (0) == 0)
+ return (_rl_dispatch (ANYOTHERKEY, FUNCTION_TO_KEYMAP (map, key)));
+ #endif
+
+! rl_key_sequence_length++;
+ _rl_dispatching_keymap = FUNCTION_TO_KEYMAP (map, key);
+
+--- 879,893 ----
+ will be if an arrow key has been pressed, and, if there's not,
+ just dispatch to (what we assume is) rl_vi_movement_mode right
+! away. This is essentially an input test with a zero timeout (by
+! default) or a timeout determined by the value of `keyseq-timeout' */
+! /* _rl_keyseq_timeout specified in milliseconds; _rl_input_queued
+! takes microseconds, so multiply by 1000 */
+ if (rl_editing_mode == vi_mode && key == ESC && map == vi_insertion_keymap
+! && _rl_input_queued ((_rl_keyseq_timeout > 0) ? _rl_keyseq_timeout*1000 : 0) == 0)
+ return (_rl_dispatch (ANYOTHERKEY, FUNCTION_TO_KEYMAP (map, key)));
+ #endif
+
+! RESIZE_KEYSEQ_BUFFER ();
+! rl_executing_keyseq[rl_key_sequence_length++] = key;
+ _rl_dispatching_keymap = FUNCTION_TO_KEYMAP (map, key);
+
+***************
+*** 856,859 ****
+--- 918,933 ----
+ #endif
+
++ /* Tentative inter-character timeout for potential multi-key
++ sequences? If no input within timeout, abort sequence and
++ act as if we got non-matching input. */
++ /* _rl_keyseq_timeout specified in milliseconds; _rl_input_queued
++ takes microseconds, so multiply by 1000 */
++ if (_rl_keyseq_timeout > 0 &&
++ (RL_ISSTATE (RL_STATE_INPUTPENDING|RL_STATE_MACROINPUT) == 0) &&
++ _rl_pushed_input_available () == 0 &&
++ _rl_dispatching_keymap[ANYOTHERKEY].function &&
++ _rl_input_queued (_rl_keyseq_timeout*1000) == 0)
++ return (_rl_subseq_result (-2, map, key, got_subseq));
++
+ newkey = _rl_subseq_getchar (key);
+ if (newkey < 0)
+***************
+*** 876,879 ****
+--- 950,954 ----
+ if (map[key].function != 0)
+ {
++ rl_executing_keyseq[rl_key_sequence_length] = '\0';
+ macro = savestring ((char *)map[key].function);
+ _rl_with_macro_input (macro);
+***************
+*** 885,888 ****
+--- 960,964 ----
+ if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap &&
+ key != ANYOTHERKEY &&
++ rl_key_sequence_length == 1 && /* XXX */
+ _rl_vi_textmod_command (key))
+ _rl_vi_set_last (key, rl_numeric_arg, rl_arg_sign);
+***************
+*** 936,940 ****
+ tell the caller that it should try ANYOTHERKEY for an
+ overridden function. */
+! _rl_unget_char (key);
+ _rl_dispatching_keymap = map;
+ return -2;
+--- 1012,1019 ----
+ tell the caller that it should try ANYOTHERKEY for an
+ overridden function. */
+! if (RL_ISSTATE (RL_STATE_MACROINPUT))
+! _rl_prev_macro_key ();
+! else
+! _rl_unget_char (key);
+ _rl_dispatching_keymap = map;
+ return -2;
+***************
+*** 943,947 ****
+ {
+ /* OK, back up the chain. */
+! _rl_unget_char (key);
+ _rl_dispatching_keymap = map;
+ return -1;
+--- 1022,1029 ----
+ {
+ /* OK, back up the chain. */
+! if (RL_ISSTATE (RL_STATE_MACROINPUT))
+! _rl_prev_macro_key ();
+! else
+! _rl_unget_char (key);
+ _rl_dispatching_keymap = map;
+ return -1;
+***************
+*** 1092,1103 ****
+ bind_arrow_keys ();
+
+- /* Enable the meta key, if this terminal has one. */
+- if (_rl_enable_meta)
+- _rl_enable_meta_key ();
+-
+ /* If the completion parser's default word break characters haven't
+ been set yet, then do so now. */
+ if (rl_completer_word_break_characters == (char *)NULL)
+ rl_completer_word_break_characters = (char *)rl_basic_word_break_characters;
+ }
+
+--- 1174,1190 ----
+ bind_arrow_keys ();
+
+ /* If the completion parser's default word break characters haven't
+ been set yet, then do so now. */
+ if (rl_completer_word_break_characters == (char *)NULL)
+ rl_completer_word_break_characters = (char *)rl_basic_word_break_characters;
++
++ #if defined (COLOR_SUPPORT)
++ if (_rl_colored_stats)
++ _rl_parse_colors ();
++ #endif
++
++ rl_executing_keyseq = malloc (_rl_executing_keyseq_size = 16);
++ if (rl_executing_keyseq)
++ rl_executing_keyseq[0] = '\0';
+ }
+
+***************
+*** 1160,1163 ****
+--- 1247,1254 ----
+ rl_bind_keyseq_if_unbound ("\340M", rl_forward_char);
+ rl_bind_keyseq_if_unbound ("\340K", rl_backward_char);
++ rl_bind_keyseq_if_unbound ("\340G", rl_beg_of_line);
++ rl_bind_keyseq_if_unbound ("\340O", rl_end_of_line);
++ rl_bind_keyseq_if_unbound ("\340S", rl_delete);
++ rl_bind_keyseq_if_unbound ("\340R", rl_overwrite_mode);
+ #endif
+
want to note this before execute_in_subshell modifies the
COMMAND struct. Need to keep in mind that execute_in_subshell
runs the exit trap for () subshells itself. */
- /* This handles { command; } &
+ /* This handles { command; } & */
s = user_subshell == 0 && command->type == cm_group && pipe_in == NO_PIPE && pipe_out == NO_PIPE && asynchronous;
/* run exit trap for : | { ...; } and { ...; } | : */
/* run exit trap for : | ( ...; ) and ( ...; ) | : */
{
WORD_LIST *w, *wcmd;
struct builtin *b;
- int assoc, global, array;
+ int assoc, global, array, integer;
if (words == 0)
return;
b = 0;
- assoc = global = array = 0;
+ assoc = global = array = integer = 0;
/* Skip over assignment statements preceding a command name */
wcmd = words;
#endif
if (global)
w->word->flags |= W_ASSNGLOBAL;
+ if (integer)
+ w->word->flags |= W_ASSIGNINT;
}
#if defined (ARRAY_VARS)
/* Note that we saw an associative array option to a builtin that takes
array = 1;
if ((wcmd->word->flags & W_ASSNBLTIN) && strchr (w->word->word+1, 'g'))
global = 1;
+ if ((wcmd->word->flags & W_ASSNBLTIN) && strchr (w->word->word+1, 'i'))
+ integer = 1;
}
}
--- /dev/null
+/* execute_cmd.c -- Execute a COMMAND structure. */
+
+/* Copyright (C) 1987-2013 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>
+#if defined (HAVE_SYS_PARAM_H)
+# 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 job_control; /* XXX */
+
+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 *, FUNCTION_DEF *));
+
+/* 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;
+
+/* Are we currently ignoring the -e option for the duration of a builtin's
+ execution? */
+int builtin_ignoring_errexit = 0;
+
+/* 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;
+
+/* $LINENO ($BASH_LINENO) for use by an ERR trap. Global so parse_and_execute
+ can save and restore it. */
+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)
+ if (currently_executing_command->type == cm_arith)
+ return currently_executing_command->value.Arith->line;
+#endif
+#if defined (ARITH_FOR_COMMAND)
+ 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;
+ char *tcmd;
+ volatile int last_pid;
+ volatile int save_line_number;
+#if defined (PROCESS_SUBSTITUTION)
+ volatile int ofifo, nfifo, osize, saved_fifo;
+ volatile char *ofifo_list;
+#endif
+
+ if (breaking || continuing)
+ return (last_command_exit_value);
+ if (command == 0 || read_but_dont_execute)
+ return (EXECUTION_SUCCESS);
+
+ 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;
+ int s;
+
+ /* 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;
+ tcmd = make_command_string (command);
+ paren_pid = make_child (savestring (tcmd), asynchronous);
+
+ if (user_subshell && signal_is_trapped (ERROR_TRAP) &&
+ signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0)
+ {
+ FREE (the_printed_command_except_trap);
+ the_printed_command_except_trap = savestring (the_printed_command);
+ }
+
+ if (paren_pid == 0)
+ {
+ /* We want to run the exit trap for forced {} subshells, and we
+ want to note this before execute_in_subshell modifies the
+ COMMAND struct. Need to keep in mind that execute_in_subshell
+ runs the exit trap for () subshells itself. */
+ /* This handles { command; } & */
+ s = user_subshell == 0 && command->type == cm_group && pipe_in == NO_PIPE && pipe_out == NO_PIPE && asynchronous;
+ /* run exit trap for : | { ...; } and { ...; } | : */
+ /* run exit trap for : | ( ...; ) and ( ...; ) | : */
+ s += user_subshell == 0 && command->type == cm_group && (pipe_in != NO_PIPE || pipe_out != NO_PIPE) && asynchronous == 0;
+
+ last_command_exit_value = execute_in_subshell (command, asynchronous, pipe_in, pipe_out, fds_to_close);
+ if (s)
+ subshell_exit (last_command_exit_value);
+ else
+ exit (last_command_exit_value);
+ /* NOTREACHED */
+ }
+ else
+ {
+ close_pipes (pipe_in, pipe_out);
+
+#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
+ if (variable_context == 0) /* wait until shell function completes */
+ 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);
+
+#if defined (PROCESS_SUBSTITUTION)
+ if (variable_context != 0)
+ {
+ ofifo = num_fifos ();
+ ofifo_list = copy_fifo_list ((int *)&osize);
+ saved_fifo = 1;
+ }
+ else
+ saved_fifo = 0;
+#endif
+
+ /* 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 ();
+#if defined (PROCESS_SUBSTITUTION)
+ if (saved_fifo)
+ free ((void *)ofifo_list);
+#endif
+ 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. Don't worry about
+ whether or not last_made_pid == last_pid; already_making_children
+ tells us whether or not there are unwaited-for children to wait
+ for and reap. */
+ if (already_making_children && pipe_out == NO_PIPE)
+ {
+ 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);
+ 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");
+
+#if defined (PROCESS_SUBSTITUTION)
+ if (saved_fifo)
+ {
+ nfifo = num_fifos ();
+ if (nfifo > ofifo)
+ close_new_fifos ((char *)ofifo_list, osize);
+ free ((void *)ofifo_list);
+ }
+#endif
+
+ /* 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 && (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 (EXIT_TRAP);
+ }
+
+ /* 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_nosigs (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_nosigs (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;
+ int lock;
+ }
+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 void cpl_closeall __P((void));
+static struct cpelement *cpl_search __P((pid_t));
+static struct cpelement *cpl_searchbyname __P((const char *));
+static void cpl_prune __P((void));
+
+static void coproc_free __P((struct coproc *));
+
+/* Will go away when there is fully-implemented support for multiple coprocs. */
+Coproc sh_coproc = { 0, NO_PID, -1, -1, 0, 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 *p, *next, *nh, *nt;
+
+ /* Build a new list by removing dead coprocs and fix up the coproc_list
+ pointers when done. */
+ nh = nt = next = (struct cpelement *)0;
+ for (p = coproc_list.head; p; p = next)
+ {
+ next = p->next;
+ if (p->coproc->c_flags & COPROC_DEAD)
+ {
+ coproc_list.ncoproc--; /* keep running count, fix up pointers later */
+
+#if defined (DEBUG)
+ itrace("cpl_reap: deleting %d", p->coproc->c_pid);
+#endif
+
+ coproc_dispose (p->coproc);
+ cpe_dispose (p);
+ }
+ else if (nh == 0)
+ nh = nt = p;
+ else
+ {
+ nt->next = p;
+ nt = nt->next;
+ }
+ }
+
+ if (coproc_list.ncoproc == 0)
+ coproc_list.head = coproc_list.tail = 0;
+ else
+ {
+ if (nt)
+ nt->next = 0;
+ coproc_list.head = nh;
+ coproc_list.tail = nt;
+ if (coproc_list.ncoproc == 1)
+ coproc_list.tail = coproc_list.head; /* just to make sure */
+ }
+}
+
+/* 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;
+}
+
+static void
+cpl_closeall ()
+{
+ struct cpelement *cpe;
+
+ for (cpe = coproc_list.head; cpe; cpe = cpe->next)
+ coproc_close (cpe->coproc);
+}
+
+static void
+cpl_fdchk (fd)
+ int fd;
+{
+ struct cpelement *cpe;
+
+ for (cpe = coproc_list.head; cpe; cpe = cpe->next)
+ coproc_checkfd (cpe->coproc, fd);
+}
+
+/* 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 *cpe;
+
+ for (cpe = coproc_list.head ; cpe; cpe = cpe->next)
+ if (cpe->coproc->c_pid == pid)
+ return cpe;
+ 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)
+ const 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;
+{
+#if MULTIPLE_COPROCS
+ struct cpelement *p;
+
+ p = cpl_search (pid);
+ return (p ? p->coproc : 0);
+#else
+ return (pid == sh_coproc.c_pid ? &sh_coproc : 0);
+#endif
+}
+
+struct coproc *
+getcoprocbyname (name)
+ const char *name;
+{
+#if MULTIPLE_COPROCS
+ struct cpelement *p;
+
+ p = cpl_searchbyname (name);
+ return (p ? p->coproc : 0);
+#else
+ return ((sh_coproc.c_name && STREQ (sh_coproc.c_name, name)) ? &sh_coproc : 0);
+#endif
+}
+
+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 = cp->c_lock = 0;
+}
+
+struct coproc *
+coproc_alloc (name, pid)
+ char *name;
+ pid_t pid;
+{
+ struct coproc *cp;
+
+#if MULTIPLE_COPROCS
+ cp = (struct coproc *)xmalloc (sizeof (struct coproc));
+#else
+ cp = &sh_coproc;
+#endif
+ coproc_init (cp);
+ cp->c_lock = 2;
+
+ cp->c_pid = pid;
+ cp->c_name = savestring (name);
+#if MULTIPLE_COPROCS
+ cpl_add (cp);
+#endif
+ cp->c_lock = 0;
+ return (cp);
+}
+
+static void
+coproc_free (cp)
+ struct coproc *cp;
+{
+ free (cp);
+}
+
+void
+coproc_dispose (cp)
+ struct coproc *cp;
+{
+ sigset_t set, oset;
+
+ if (cp == 0)
+ return;
+
+ BLOCK_SIGNAL (SIGCHLD, set, oset);
+ cp->c_lock = 3;
+ coproc_unsetvars (cp);
+ FREE (cp->c_name);
+ coproc_close (cp);
+#if MULTIPLE_COPROCS
+ coproc_free (cp);
+#else
+ coproc_init (cp);
+ cp->c_lock = 0;
+#endif
+ UNBLOCK_SIGNAL (oset);
+}
+
+/* Placeholder for now. Will require changes for multiple coprocs */
+void
+coproc_flush ()
+{
+#if MULTIPLE_COPROCS
+ cpl_flush ();
+#else
+ coproc_dispose (&sh_coproc);
+#endif
+}
+
+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 ()
+{
+#if MULTIPLE_COPROCS
+ cpl_closeall ();
+#else
+ coproc_close (&sh_coproc); /* XXX - will require changes for multiple coprocs */
+#endif
+}
+
+void
+coproc_reap ()
+{
+#if MULTIPLE_COPROCS
+ cpl_reap ();
+#else
+ struct coproc *cp;
+
+ cp = &sh_coproc; /* XXX - will require changes for multiple coprocs */
+ if (cp && (cp->c_flags & COPROC_DEAD))
+ coproc_dispose (cp);
+#endif
+}
+
+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;
+{
+#if MULTIPLE_COPROCS
+ cpl_fdchk (fd);
+#else
+ coproc_checkfd (&sh_coproc, fd);
+#endif
+}
+
+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;
+
+#if MULTIPLE_COPROCS
+ struct cpelement *cpe;
+
+ cpe = cpl_delete (pid);
+ cp = cpe ? cpe->coproc : 0;
+#else
+ cp = getcoprocbypid (pid);
+#endif
+ if (cp)
+ {
+ cp->c_lock = 4;
+ cp->c_status = status;
+ cp->c_flags |= COPROC_DEAD;
+ cp->c_flags &= ~COPROC_RUNNING;
+ /* Don't dispose the coproc or unset the COPROC_XXX variables because
+ this is executed in a signal handler context. Wait until coproc_reap
+ takes care of it. */
+ cp->c_lock = 0;
+ }
+}
+
+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, invert;
+ pid_t coproc_pid;
+ Coproc *cp;
+ char *tcmd;
+ sigset_t set, oset;
+
+ /* XXX -- can be removed after changes to handle multiple coprocs */
+#if !MULTIPLE_COPROCS
+ if (sh_coproc.c_pid != NO_PID)
+ internal_warning ("execute_coproc: coproc [%d:%s] still exists", sh_coproc.c_pid, sh_coproc.c_name);
+ coproc_init (&sh_coproc);
+#endif
+
+ invert = (command->flags & CMD_INVERT_RETURN) != 0;
+ 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 */
+
+ BLOCK_SIGNAL (SIGCHLD, set, oset);
+
+ coproc_pid = make_child (savestring (tcmd), 1);
+
+ if (coproc_pid == 0)
+ {
+ close (rpipe[0]);
+ close (wpipe[1]);
+
+ UNBLOCK_SIGNAL (oset);
+ 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]);
+
+ /* XXX - possibly run Coproc->name through word expansion? */
+ 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);
+
+ UNBLOCK_SIGNAL (oset);
+
+#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 (invert ? EXECUTION_FAILURE : 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, 1, -1);
+ 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);
+ }
+ if (cmd)
+ 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 (signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0)
+ {
+ 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;
+ /* XXX - special ksh93 for command index variable handling */
+ v = find_variable_last_nameref (identifier);
+ if (v && nameref_p (v))
+ {
+ v = bind_variable_value (v, list->word->word, 0);
+ }
+ else
+ 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 slen;
+ int wclen;
+
+ 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 (wclen < 0 ? STRLEN(s) : 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)
+ ;
+ if (l == 0) /* don't think this can happen */
+ return (0);
+ 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); /* XXX - can't be null? */
+ }
+}
+
+/* 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 = "";
+
+/* XXX - can COND ever be NULL when this is called? */
+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)
+ if (pipe_out == NO_PIPE)
+ 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, *wcmd;
+ struct builtin *b;
+ int assoc, global, array;
+
+ if (words == 0)
+ return;
+
+ b = 0;
+ assoc = global = array = 0;
+
+ /* Skip over assignment statements preceding a command name */
+ wcmd = words;
+ for (wcmd = words; wcmd; wcmd = wcmd->next)
+ if ((wcmd->word->flags & W_ASSIGNMENT) == 0)
+ break;
+
+ for (w = wcmd; w; w = w->next)
+ if (w->word->flags & W_ASSIGNMENT)
+ {
+ if (b == 0)
+ {
+ /* Posix (post-2008) says that `command' doesn't change whether
+ or not the builtin it shadows is a `declaration command', even
+ though it removes other special builtin properties. In Posix
+ mode, we skip over one or more instances of `command' and
+ deal with the next word as the assignment builtin. */
+ while (posixly_correct && wcmd && wcmd->word && wcmd->word->word && STREQ (wcmd->word->word, "command"))
+ wcmd = wcmd->next;
+ b = builtin_address_internal (wcmd->word->word, 0);
+ if (b == 0 || (b->flags & ASSIGNMENT_BUILTIN) == 0)
+ return;
+ else if (b && (b->flags & ASSIGNMENT_BUILTIN))
+ wcmd->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;
+ if (array)
+ w->word->flags |= W_ASSIGNARRAY;
+#endif
+ if (global)
+ w->word->flags |= W_ASSNGLOBAL;
+ }
+#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+1, 'A') || strchr (w->word->word+1, 'a') || strchr (w->word->word+1, 'g')))
+#else
+ else if (w->word->word[0] == '-' && strchr (w->word->word+1, 'g'))
+#endif
+ {
+ if (b == 0)
+ {
+ while (posixly_correct && wcmd && wcmd->word && wcmd->word->word && STREQ (wcmd->word->word, "command"))
+ wcmd = wcmd->next;
+ b = builtin_address_internal (wcmd->word->word, 0);
+ if (b == 0 || (b->flags & ASSIGNMENT_BUILTIN) == 0)
+ return;
+ else if (b && (b->flags & ASSIGNMENT_BUILTIN))
+ wcmd->word->flags |= W_ASSNBLTIN;
+ }
+ if ((wcmd->word->flags & W_ASSNBLTIN) && strchr (w->word->word+1, 'A'))
+ assoc = 1;
+ else if ((wcmd->word->flags & W_ASSNBLTIN) && strchr (w->word->word+1, 'a'))
+ array = 1;
+ if ((wcmd->word->flags & W_ASSNBLTIN) && strchr (w->word->word+1, 'g'))
+ global = 1;
+ }
+}
+
+/* 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;
+ int ret;
+
+ temp = search_for_command (pathname, 0);
+ ret = (temp ? file_isdir (temp) : file_isdir (pathname));
+ free (temp);
+ return ret;
+}
+
+/* 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;
+
+ QUIT;
+
+ /* 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;
+
+ CHECK_SIGTERM;
+ }
+ else
+ {
+ /* Don't let simple commands that aren't the last command in a
+ pipeline change $? for the rest of the pipeline (or at all). */
+ if (pipe_out != NO_PIPE)
+ result = last_command_exit_value;
+ close_pipes (pipe_in, pipe_out);
+#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
+ /* Close /dev/fd file descriptors in the parent after forking the
+ last child in a (possibly one-element) pipeline. */
+ if (pipe_out == NO_PIPE) /* XXX */
+ unlink_fifo_list (); /* XXX */
+#endif
+ command_line = (char *)NULL; /* don't free this. */
+ bind_lastarg ((char *)NULL);
+ return (result);
+ }
+ }
+
+ /* If we are re-running this as the result of executing the `command'
+ builtin, do not expand the command words a second time. */
+ if ((simple_command->flags & CMD_INHIBIT_EXPANSION) == 0)
+ {
+ current_fds_to_close = fds_to_close;
+ fix_assignment_words (simple_command->words);
+ /* Pass the ignore return flag down to command substitutions */
+ if (simple_command->flags & CMD_IGNORE_RETURN) /* XXX */
+ comsub_ignore_return++;
+ words = expand_words (simple_command->words);
+ if (simple_command->flags & CMD_IGNORE_RETURN)
+ comsub_ignore_return--;
+ current_fds_to_close = (struct fd_bitmap *)NULL;
+ }
+ else
+ words = copy_word_list (simple_command->words);
+
+ /* It is possible for WORDS not to have anything left in it.
+ Perhaps all the words consisted of `$foo', and there was
+ no variable `$foo'. */
+ if (words == 0)
+ {
+ this_command_name = 0;
+ result = execute_null_command (simple_command->redirects,
+ pipe_in, pipe_out,
+ already_forked ? 0 : async);
+ if (already_forked)
+ exit (result);
+ else
+ {
+ bind_lastarg ((char *)NULL);
+ set_pipestatus_from_exit (result);
+ return (result);
+ }
+ }
+
+ lastarg = (char *)NULL;
+
+ begin_unwind_frame ("simple-command");
+
+ if (echo_command_at_execute)
+ xtrace_print_word_list (words, 1);
+
+ builtin = (sh_builtin_func_t *)NULL;
+ func = (SHELL_VAR *)NULL;
+ if ((simple_command->flags & CMD_NO_FUNCTIONS) == 0)
+ {
+ /* Posix.2 says special builtins are found before functions. We
+ don't set builtin_is_special anywhere other than here, because
+ this path is followed only when the `command' builtin is *not*
+ being used, and we don't want to exit the shell if a special
+ builtin executed with `command builtin' fails. `command' is not
+ a special builtin. */
+ if (posixly_correct)
+ {
+ builtin = find_special_builtin (words->word->word);
+ if (builtin)
+ builtin_is_special = 1;
+ }
+ if (builtin == 0)
+ func = find_function (words->word->word);
+ }
+
+ /* In POSIX mode, assignment errors in the temporary environment cause a
+ non-interactive shell to exit. */
+ if (builtin_is_special && interactive_shell == 0 && tempenv_assign_error)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ jump_to_top_level (ERREXIT);
+ }
+ tempenv_assign_error = 0; /* don't care about this any more */
+
+ add_unwind_protect (dispose_words, words);
+ QUIT;
+
+ /* Bind the last word in this command to "$_" 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 ? 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;
+
+ 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);
+ unwind_protect_int (builtin_ignoring_errexit);
+ 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;
+ builtin_ignoring_errexit = 1;
+ 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.
+ `mapfile' is a special case because it uses evalstring (same as
+ eval or source) to run its callbacks. */
+ isbltinenv = (builtin == source_builtin || builtin == eval_builtin || builtin == unset_builtin || builtin == mapfile_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 = errexit_flag;
+ builtin_ignoring_errexit = 0;
+ if (error_trap)
+ {
+ set_error_trap (error_trap);
+ xfree (error_trap);
+ }
+ discard_unwind_frame ("eval_builtin");
+ }
+
+ 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_nosigs (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 ((ARRAY *)bash_source_a);
+ array_pop ((ARRAY *)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_nosigs (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_nosigs (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, 1);
+
+ 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;
+
+ reset_terminating_signals (); /* XXX */
+ /* Cancel traps, in trap.c. */
+ restore_original_signals ();
+
+ CHECK_SIGTERM;
+
+ /* 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 */
+ }
+
+#if defined (JOB_CONTROL)
+ /* May need to reinitialize more of the job control state here. */
+ kill_current_pipeline ();
+#endif
+
+ wl = make_word_list (make_word (NOTFOUND_HOOK), words);
+ exit (execute_shell_function (hookf, wl));
+ }
+
+ CHECK_SIGTERM;
+
+ /* 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:
+ QUIT;
+
+ /* 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);
+ sample[sample_len - 1] = '\0';
+ 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: %s"), command, strerror (i));
+ 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, funcdef)
+ WORD_DESC *name;
+ FUNCTION_DEF *funcdef;
+{
+ 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);
+ }
+
+ /* Posix interpretation 383 */
+ if (posixly_correct && find_special_builtin (name->word))
+ {
+ internal_error (_("`%s': is a special builtin"), name->word);
+ last_command_exit_value = EX_BADUSAGE;
+ jump_to_top_level (ERREXIT);
+ }
+
+ 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);
+ }
+
+#if defined (DEBUGGER)
+ bind_function_def (name->word, funcdef);
+#endif
+
+ bind_function (name->word, funcdef->command);
+ 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__ */
+ }
+}
truncate to. */
if (bp > buffer && ((file = open (filename, O_WRONLY|O_TRUNC|O_BINARY, 0600)) != -1))
{
- write (file, bp, chars_read - (bp - buffer));
+ if (write (file, bp, chars_read - (bp - buffer)) < 0)
+ rv = errno;
#if defined (__BEOS__)
/* BeOS ignores O_TRUNC. */
ftruncate (file, chars_read - (bp - buffer));
#endif
- close (file);
+ if (close (file) < 0 && rv == 0)
+ rv = errno;
}
truncate_exit:
#endif
}
- close (file);
+ if (close (file) < 0 && rv == 0)
+ rv = errno;
if (rv != 0 && output && bakname)
rename (bakname, output);
WHERE is the history list number of the current line. If it is
-1, then this line is the starting one. */
static void
-rl_display_search (search_string, reverse_p, where)
+rl_display_search (search_string, flags, where)
char *search_string;
- int reverse_p, where;
+ int flags, where;
{
char *message;
int msglen, searchlen;
searchlen = (search_string && *search_string) ? strlen (search_string) : 0;
- message = (char *)xmalloc (searchlen + 33);
+ message = (char *)xmalloc (searchlen + 64);
msglen = 0;
#if defined (NOTDEF)
message[msglen++] = '(';
- if (reverse_p)
+ if (flags & SF_FAILED)
+ {
+ strcpy (message + msglen, "failed ");
+ msglen += 7;
+ }
+
+ if (flags & SF_REVERSE)
{
strcpy (message + msglen, "reverse-");
msglen += 8;
cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
strcpy (cxt->search_string, last_isearch_string);
cxt->search_string_index = last_isearch_string_len;
- rl_display_search (cxt->search_string, (cxt->sflags & SF_REVERSE), -1);
+ rl_display_search (cxt->search_string, cxt->sflags, -1);
break;
}
return (1);
/* We cannot find the search string. Ding the bell. */
rl_ding ();
cxt->history_pos = cxt->last_found_line;
+ rl_display_search (cxt->search_string, cxt->sflags, (cxt->history_pos == cxt->save_line) ? -1 : cxt->history_pos);
return 1;
}
rl_replace_line (cxt->lines[cxt->history_pos], 0);
rl_point = cxt->sline_index;
cxt->last_found_line = cxt->history_pos;
- rl_display_search (cxt->search_string, (cxt->sflags & SF_REVERSE), (cxt->history_pos == cxt->save_line) ? -1 : cxt->history_pos);
+ rl_display_search (cxt->search_string, cxt->sflags, (cxt->history_pos == cxt->save_line) ? -1 : cxt->history_pos);
}
return 1;
RL_SETSTATE(RL_STATE_ISEARCH);
cxt = _rl_isearch_init (direction);
- rl_display_search (cxt->search_string, (cxt->sflags & SF_REVERSE), -1);
+ rl_display_search (cxt->search_string, cxt->sflags, -1);
/* If we are using the callback interface, all we do is set up here and
return. The key is that we leave RL_STATE_ISEARCH set. */
--- /dev/null
+/* isearch.c - incremental searching */
+
+/* **************************************************************** */
+/* */
+/* I-Search and Searching */
+/* */
+/* **************************************************************** */
+
+/* Copyright (C) 1987-2012 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 "rlprivate.h"
+#include "xmalloc.h"
+
+/* Variables exported to other files in the readline library. */
+char *_rl_isearch_terminators = (char *)NULL;
+
+_rl_search_cxt *_rl_iscxt = 0;
+
+/* Variables imported from other files in the readline library. */
+extern HIST_ENTRY *_rl_saved_line_for_history;
+
+static int rl_search_history PARAMS((int, int));
+
+static _rl_search_cxt *_rl_isearch_init PARAMS((int));
+static void _rl_isearch_fini PARAMS((_rl_search_cxt *));
+static int _rl_isearch_cleanup PARAMS((_rl_search_cxt *, int));
+
+/* Last line found by the current incremental search, so we don't `find'
+ identical lines many times in a row. Now part of isearch context. */
+/* static char *prev_line_found; */
+
+/* Last search string and its length. */
+static char *last_isearch_string;
+static int last_isearch_string_len;
+
+static char * const default_isearch_terminators = "\033\012";
+
+_rl_search_cxt *
+_rl_scxt_alloc (type, flags)
+ int type, flags;
+{
+ _rl_search_cxt *cxt;
+
+ cxt = (_rl_search_cxt *)xmalloc (sizeof (_rl_search_cxt));
+
+ cxt->type = type;
+ cxt->sflags = flags;
+
+ cxt->search_string = 0;
+ cxt->search_string_size = cxt->search_string_index = 0;
+
+ cxt->lines = 0;
+ cxt->allocated_line = 0;
+ cxt->hlen = cxt->hindex = 0;
+
+ cxt->save_point = rl_point;
+ cxt->save_mark = rl_mark;
+ cxt->save_line = where_history ();
+ cxt->last_found_line = cxt->save_line;
+ cxt->prev_line_found = 0;
+
+ cxt->save_undo_list = 0;
+
+ cxt->keymap = _rl_keymap;
+ cxt->okeymap = _rl_keymap;
+
+ cxt->history_pos = 0;
+ cxt->direction = 0;
+
+ cxt->prevc = cxt->lastc = 0;
+
+ cxt->sline = 0;
+ cxt->sline_len = cxt->sline_index = 0;
+
+ cxt->search_terminators = 0;
+
+ return cxt;
+}
+
+void
+_rl_scxt_dispose (cxt, flags)
+ _rl_search_cxt *cxt;
+ int flags;
+{
+ FREE (cxt->search_string);
+ FREE (cxt->allocated_line);
+ FREE (cxt->lines);
+
+ xfree (cxt);
+}
+
+/* Search backwards through the history looking for a string which is typed
+ interactively. Start with the current line. */
+int
+rl_reverse_search_history (sign, key)
+ int sign, key;
+{
+ return (rl_search_history (-sign, key));
+}
+
+/* Search forwards through the history looking for a string which is typed
+ interactively. Start with the current line. */
+int
+rl_forward_search_history (sign, key)
+ int sign, key;
+{
+ return (rl_search_history (sign, key));
+}
+
+/* Display the current state of the search in the echo-area.
+ SEARCH_STRING contains the string that is being searched for,
+ DIRECTION is zero for forward, or non-zero for reverse,
+ WHERE is the history list number of the current line. If it is
+ -1, then this line is the starting one. */
+static void
+rl_display_search (search_string, flags, where)
+ char *search_string;
+ int flags, where;
+{
+ char *message;
+ int msglen, searchlen;
+
+ searchlen = (search_string && *search_string) ? strlen (search_string) : 0;
+
+ message = (char *)xmalloc (searchlen + 64);
+ msglen = 0;
+
+#if defined (NOTDEF)
+ if (where != -1)
+ {
+ sprintf (message, "[%d]", where + history_base);
+ msglen = strlen (message);
+ }
+#endif /* NOTDEF */
+
+ message[msglen++] = '(';
+
+ if (flags & SF_FAILED)
+ {
+ strcpy (message + msglen, "failed ");
+ msglen += 7;
+ }
+
+ if (flags & SF_REVERSE)
+ {
+ strcpy (message + msglen, "reverse-");
+ msglen += 8;
+ }
+
+ strcpy (message + msglen, "i-search)`");
+ msglen += 10;
+
+ if (search_string)
+ {
+ strcpy (message + msglen, search_string);
+ msglen += searchlen;
+ }
+
+ strcpy (message + msglen, "': ");
+
+ rl_message ("%s", message);
+ xfree (message);
+ (*rl_redisplay_function) ();
+}
+
+static _rl_search_cxt *
+_rl_isearch_init (direction)
+ int direction;
+{
+ _rl_search_cxt *cxt;
+ register int i;
+ HIST_ENTRY **hlist;
+
+ cxt = _rl_scxt_alloc (RL_SEARCH_ISEARCH, 0);
+ if (direction < 0)
+ cxt->sflags |= SF_REVERSE;
+
+ cxt->search_terminators = _rl_isearch_terminators ? _rl_isearch_terminators
+ : default_isearch_terminators;
+
+ /* Create an arrary of pointers to the lines that we want to search. */
+ hlist = history_list ();
+ rl_maybe_replace_line ();
+ i = 0;
+ if (hlist)
+ for (i = 0; hlist[i]; i++);
+
+ /* Allocate space for this many lines, +1 for the current input line,
+ and remember those lines. */
+ cxt->lines = (char **)xmalloc ((1 + (cxt->hlen = i)) * sizeof (char *));
+ for (i = 0; i < cxt->hlen; i++)
+ cxt->lines[i] = hlist[i]->line;
+
+ if (_rl_saved_line_for_history)
+ cxt->lines[i] = _rl_saved_line_for_history->line;
+ else
+ {
+ /* Keep track of this so we can free it. */
+ cxt->allocated_line = (char *)xmalloc (1 + strlen (rl_line_buffer));
+ strcpy (cxt->allocated_line, &rl_line_buffer[0]);
+ cxt->lines[i] = cxt->allocated_line;
+ }
+
+ cxt->hlen++;
+
+ /* The line where we start the search. */
+ cxt->history_pos = cxt->save_line;
+
+ rl_save_prompt ();
+
+ /* Initialize search parameters. */
+ cxt->search_string = (char *)xmalloc (cxt->search_string_size = 128);
+ cxt->search_string[cxt->search_string_index = 0] = '\0';
+
+ /* Normalize DIRECTION into 1 or -1. */
+ cxt->direction = (direction >= 0) ? 1 : -1;
+
+ cxt->sline = rl_line_buffer;
+ cxt->sline_len = strlen (cxt->sline);
+ cxt->sline_index = rl_point;
+
+ _rl_iscxt = cxt; /* save globally */
+
+ return cxt;
+}
+
+static void
+_rl_isearch_fini (cxt)
+ _rl_search_cxt *cxt;
+{
+ /* First put back the original state. */
+ strcpy (rl_line_buffer, cxt->lines[cxt->save_line]);
+
+ rl_restore_prompt ();
+
+ /* Save the search string for possible later use. */
+ FREE (last_isearch_string);
+ last_isearch_string = cxt->search_string;
+ last_isearch_string_len = cxt->search_string_index;
+ cxt->search_string = 0;
+
+ if (cxt->last_found_line < cxt->save_line)
+ rl_get_previous_history (cxt->save_line - cxt->last_found_line, 0);
+ else
+ rl_get_next_history (cxt->last_found_line - cxt->save_line, 0);
+
+ /* If the string was not found, put point at the end of the last matching
+ line. If last_found_line == orig_line, we didn't find any matching
+ history lines at all, so put point back in its original position. */
+ if (cxt->sline_index < 0)
+ {
+ if (cxt->last_found_line == cxt->save_line)
+ cxt->sline_index = cxt->save_point;
+ else
+ cxt->sline_index = strlen (rl_line_buffer);
+ rl_mark = cxt->save_mark;
+ }
+
+ rl_point = cxt->sline_index;
+ /* Don't worry about where to put the mark here; rl_get_previous_history
+ and rl_get_next_history take care of it. */
+
+ rl_clear_message ();
+}
+
+int
+_rl_search_getchar (cxt)
+ _rl_search_cxt *cxt;
+{
+ int c;
+
+ /* Read a key and decide how to proceed. */
+ RL_SETSTATE(RL_STATE_MOREINPUT);
+ c = cxt->lastc = rl_read_key ();
+ RL_UNSETSTATE(RL_STATE_MOREINPUT);
+
+#if defined (HANDLE_MULTIBYTE)
+ /* This ends up with C (and LASTC) being set to the last byte of the
+ multibyte character. In most cases c == lastc == mb[0] */
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ c = cxt->lastc = _rl_read_mbstring (cxt->lastc, cxt->mb, MB_LEN_MAX);
+#endif
+
+ RL_CHECK_SIGNALS ();
+ return c;
+}
+
+#define ENDSRCH_CHAR(c) \
+ ((CTRL_CHAR (c) || META_CHAR (c) || (c) == RUBOUT) && ((c) != CTRL ('G')))
+
+/* Process just-read character C according to isearch context CXT. Return
+ -1 if the caller should just free the context and return, 0 if we should
+ break out of the loop, and 1 if we should continue to read characters. */
+int
+_rl_isearch_dispatch (cxt, c)
+ _rl_search_cxt *cxt;
+ int c;
+{
+ int n, wstart, wlen, limit, cval;
+ rl_command_func_t *f;
+
+ f = (rl_command_func_t *)NULL;
+
+ if (c < 0)
+ {
+ cxt->sflags |= SF_FAILED;
+ cxt->history_pos = cxt->last_found_line;
+ return -1;
+ }
+
+ /* If we are moving into a new keymap, modify cxt->keymap and go on.
+ This can be a problem if c == ESC and we want to terminate the
+ incremental search, so we check */
+ if (c >= 0 && cxt->keymap[c].type == ISKMAP && strchr (cxt->search_terminators, cxt->lastc) == 0)
+ {
+ /* _rl_keyseq_timeout specified in milliseconds; _rl_input_queued
+ takes microseconds, so multiply by 1000. If we don't get any
+ additional input and we this keymap shadows another function, process
+ that key as if it was all we read. */
+ if (_rl_keyseq_timeout > 0 &&
+ RL_ISSTATE (RL_STATE_CALLBACK) == 0 &&
+ RL_ISSTATE (RL_STATE_INPUTPENDING) == 0 &&
+ _rl_pushed_input_available () == 0 &&
+ ((Keymap)(cxt->keymap[c].function))[ANYOTHERKEY].function &&
+ _rl_input_queued (_rl_keyseq_timeout*1000) == 0)
+ goto add_character;
+
+ cxt->okeymap = cxt->keymap;
+ cxt->keymap = FUNCTION_TO_KEYMAP (cxt->keymap, c);
+ cxt->sflags |= SF_CHGKMAP;
+ /* XXX - we should probably save this sequence, so we can do
+ something useful if this doesn't end up mapping to a command we
+ interpret here. Right now we just save the most recent character
+ that caused the index into a new keymap. */
+ cxt->prevc = c;
+#if defined (HANDLE_MULTIBYTE)
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ {
+ if (cxt->mb[1] == 0)
+ {
+ cxt->pmb[0] = c; /* XXX should be == cxt->mb[0] */
+ cxt->pmb[1] = '\0';
+ }
+ else
+ memcpy (cxt->pmb, cxt->mb, sizeof (cxt->pmb));
+ }
+#endif
+ return 1;
+ }
+
+add_character:
+
+ /* Translate the keys we do something with to opcodes. */
+ if (c >= 0 && cxt->keymap[c].type == ISFUNC)
+ {
+ f = cxt->keymap[c].function;
+
+ if (f == rl_reverse_search_history)
+ cxt->lastc = (cxt->sflags & SF_REVERSE) ? -1 : -2;
+ else if (f == rl_forward_search_history)
+ cxt->lastc = (cxt->sflags & SF_REVERSE) ? -2 : -1;
+ else if (f == rl_rubout)
+ cxt->lastc = -3;
+ else if (c == CTRL ('G') || f == rl_abort)
+ cxt->lastc = -4;
+ else if (c == CTRL ('W') || f == rl_unix_word_rubout) /* XXX */
+ cxt->lastc = -5;
+ else if (c == CTRL ('Y') || f == rl_yank) /* XXX */
+ cxt->lastc = -6;
+ }
+
+ /* If we changed the keymap earlier while translating a key sequence into
+ a command, restore it now that we've succeeded. */
+ if (cxt->sflags & SF_CHGKMAP)
+ {
+ cxt->keymap = cxt->okeymap;
+ cxt->sflags &= ~SF_CHGKMAP;
+ /* If we indexed into a new keymap, but didn't map to a command that
+ affects the search (lastc > 0), and the character that mapped to a
+ new keymap would have ended the search (ENDSRCH_CHAR(cxt->prevc)),
+ handle that now as if the previous char would have ended the search
+ and we would have read the current character. */
+ /* XXX - should we check cxt->mb? */
+ if (cxt->lastc > 0 && ENDSRCH_CHAR (cxt->prevc))
+ {
+ rl_stuff_char (cxt->lastc);
+ rl_execute_next (cxt->prevc);
+ /* XXX - do we insert everything in cxt->pmb? */
+ return (0);
+ }
+ /* Otherwise, if the current character is mapped to self-insert or
+ nothing (i.e., not an editing command), and the previous character
+ was a keymap index, then we need to insert both the previous
+ character and the current character into the search string. */
+ else if (cxt->lastc > 0 && cxt->prevc > 0 &&
+ cxt->keymap[cxt->prevc].type == ISKMAP &&
+ (f == 0 || f == rl_insert))
+ {
+ /* Make lastc be the next character read */
+ /* XXX - do we insert everything in cxt->mb? */
+ rl_execute_next (cxt->lastc);
+ /* Dispatch on the previous character (insert into search string) */
+ cxt->lastc = cxt->prevc;
+#if defined (HANDLE_MULTIBYTE)
+ /* Have to overwrite cxt->mb here because dispatch uses it below */
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ {
+ if (cxt->pmb[1] == 0)
+ {
+ cxt->mb[0] = cxt->lastc; /* == cxt->prevc */
+ cxt->mb[1] = '\0';
+ }
+ else
+ memcpy (cxt->mb, cxt->pmb, sizeof (cxt->mb));
+ }
+#endif
+ cxt->prevc = 0;
+ }
+ else if (cxt->lastc > 0 && cxt->prevc > 0 && f && f != rl_insert)
+ {
+ rl_stuff_char (cxt->lastc);
+ rl_execute_next (cxt->prevc);
+ /* XXX - do we insert everything in cxt->pmb? */
+ return (0);
+ }
+ }
+
+ /* The characters in isearch_terminators (set from the user-settable
+ variable isearch-terminators) are used to terminate the search but
+ not subsequently execute the character as a command. The default
+ value is "\033\012" (ESC and C-J). */
+ if (cxt->lastc > 0 && strchr (cxt->search_terminators, cxt->lastc))
+ {
+ /* ESC still terminates the search, but if there is pending
+ input or if input arrives within 0.1 seconds (on systems
+ with select(2)) it is used as a prefix character
+ with rl_execute_next. WATCH OUT FOR THIS! This is intended
+ to allow the arrow keys to be used like ^F and ^B are used
+ to terminate the search and execute the movement command.
+ XXX - since _rl_input_available depends on the application-
+ settable keyboard timeout value, this could alternatively
+ use _rl_input_queued(100000) */
+ if (cxt->lastc == ESC && _rl_input_available ())
+ rl_execute_next (ESC);
+ return (0);
+ }
+
+#if defined (HANDLE_MULTIBYTE)
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ {
+ if (cxt->lastc >= 0 && (cxt->mb[0] && cxt->mb[1] == '\0') && ENDSRCH_CHAR (cxt->lastc))
+ {
+ /* This sets rl_pending_input to LASTC; it will be picked up the next
+ time rl_read_key is called. */
+ rl_execute_next (cxt->lastc);
+ return (0);
+ }
+ }
+ else
+#endif
+ if (cxt->lastc >= 0 && ENDSRCH_CHAR (cxt->lastc))
+ {
+ /* This sets rl_pending_input to LASTC; it will be picked up the next
+ time rl_read_key is called. */
+ rl_execute_next (cxt->lastc);
+ return (0);
+ }
+
+ /* Now dispatch on the character. `Opcodes' affect the search string or
+ state. Other characters are added to the string. */
+ switch (cxt->lastc)
+ {
+ /* search again */
+ case -1:
+ if (cxt->search_string_index == 0)
+ {
+ if (last_isearch_string)
+ {
+ cxt->search_string_size = 64 + last_isearch_string_len;
+ cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
+ strcpy (cxt->search_string, last_isearch_string);
+ cxt->search_string_index = last_isearch_string_len;
+ rl_display_search (cxt->search_string, cxt->sflags, -1);
+ break;
+ }
+ return (1);
+ }
+ else if (cxt->sflags & SF_REVERSE)
+ cxt->sline_index--;
+ else if (cxt->sline_index != cxt->sline_len)
+ cxt->sline_index++;
+ else
+ rl_ding ();
+ break;
+
+ /* switch directions */
+ case -2:
+ cxt->direction = -cxt->direction;
+ if (cxt->direction < 0)
+ cxt->sflags |= SF_REVERSE;
+ else
+ cxt->sflags &= ~SF_REVERSE;
+ break;
+
+ /* delete character from search string. */
+ case -3: /* C-H, DEL */
+ /* This is tricky. To do this right, we need to keep a
+ stack of search positions for the current search, with
+ sentinels marking the beginning and end. But this will
+ do until we have a real isearch-undo. */
+ if (cxt->search_string_index == 0)
+ rl_ding ();
+ else
+ cxt->search_string[--cxt->search_string_index] = '\0';
+ break;
+
+ case -4: /* C-G, abort */
+ rl_replace_line (cxt->lines[cxt->save_line], 0);
+ rl_point = cxt->save_point;
+ rl_mark = cxt->save_mark;
+ rl_restore_prompt();
+ rl_clear_message ();
+
+ return -1;
+
+ case -5: /* C-W */
+ /* skip over portion of line we already matched and yank word */
+ wstart = rl_point + cxt->search_string_index;
+ if (wstart >= rl_end)
+ {
+ rl_ding ();
+ break;
+ }
+
+ /* if not in a word, move to one. */
+ cval = _rl_char_value (rl_line_buffer, wstart);
+ if (_rl_walphabetic (cval) == 0)
+ {
+ rl_ding ();
+ break;
+ }
+ n = MB_NEXTCHAR (rl_line_buffer, wstart, 1, MB_FIND_NONZERO);;
+ while (n < rl_end)
+ {
+ cval = _rl_char_value (rl_line_buffer, n);
+ if (_rl_walphabetic (cval) == 0)
+ break;
+ n = MB_NEXTCHAR (rl_line_buffer, n, 1, MB_FIND_NONZERO);;
+ }
+ wlen = n - wstart + 1;
+ if (cxt->search_string_index + wlen + 1 >= cxt->search_string_size)
+ {
+ cxt->search_string_size += wlen + 1;
+ cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
+ }
+ for (; wstart < n; wstart++)
+ cxt->search_string[cxt->search_string_index++] = rl_line_buffer[wstart];
+ cxt->search_string[cxt->search_string_index] = '\0';
+ break;
+
+ case -6: /* C-Y */
+ /* skip over portion of line we already matched and yank rest */
+ wstart = rl_point + cxt->search_string_index;
+ if (wstart >= rl_end)
+ {
+ rl_ding ();
+ break;
+ }
+ n = rl_end - wstart + 1;
+ if (cxt->search_string_index + n + 1 >= cxt->search_string_size)
+ {
+ cxt->search_string_size += n + 1;
+ cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
+ }
+ for (n = wstart; n < rl_end; n++)
+ cxt->search_string[cxt->search_string_index++] = rl_line_buffer[n];
+ cxt->search_string[cxt->search_string_index] = '\0';
+ break;
+
+ /* Add character to search string and continue search. */
+ default:
+ if (cxt->search_string_index + 2 >= cxt->search_string_size)
+ {
+ cxt->search_string_size += 128;
+ cxt->search_string = (char *)xrealloc (cxt->search_string, cxt->search_string_size);
+ }
+#if defined (HANDLE_MULTIBYTE)
+ if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+ {
+ int j, l;
+
+ if (cxt->mb[0] == 0 || cxt->mb[1] == 0)
+ cxt->search_string[cxt->search_string_index++] = cxt->mb[0];
+ else
+ for (j = 0, l = RL_STRLEN (cxt->mb); j < l; )
+ cxt->search_string[cxt->search_string_index++] = cxt->mb[j++];
+ }
+ else
+#endif
+ cxt->search_string[cxt->search_string_index++] = cxt->lastc; /* XXX - was c instead of lastc */
+ cxt->search_string[cxt->search_string_index] = '\0';
+ break;
+ }
+
+ for (cxt->sflags &= ~(SF_FOUND|SF_FAILED);; )
+ {
+ limit = cxt->sline_len - cxt->search_string_index + 1;
+
+ /* Search the current line. */
+ while ((cxt->sflags & SF_REVERSE) ? (cxt->sline_index >= 0) : (cxt->sline_index < limit))
+ {
+ if (STREQN (cxt->search_string, cxt->sline + cxt->sline_index, cxt->search_string_index))
+ {
+ cxt->sflags |= SF_FOUND;
+ break;
+ }
+ else
+ cxt->sline_index += cxt->direction;
+ }
+ if (cxt->sflags & SF_FOUND)
+ break;
+
+ /* Move to the next line, but skip new copies of the line
+ we just found and lines shorter than the string we're
+ searching for. */
+ do
+ {
+ /* Move to the next line. */
+ cxt->history_pos += cxt->direction;
+
+ /* At limit for direction? */
+ if ((cxt->sflags & SF_REVERSE) ? (cxt->history_pos < 0) : (cxt->history_pos == cxt->hlen))
+ {
+ cxt->sflags |= SF_FAILED;
+ break;
+ }
+
+ /* We will need these later. */
+ cxt->sline = cxt->lines[cxt->history_pos];
+ cxt->sline_len = strlen (cxt->sline);
+ }
+ while ((cxt->prev_line_found && STREQ (cxt->prev_line_found, cxt->lines[cxt->history_pos])) ||
+ (cxt->search_string_index > cxt->sline_len));
+
+ if (cxt->sflags & SF_FAILED)
+ break;
+
+ /* Now set up the line for searching... */
+ cxt->sline_index = (cxt->sflags & SF_REVERSE) ? cxt->sline_len - cxt->search_string_index : 0;
+ }
+
+ if (cxt->sflags & SF_FAILED)
+ {
+ /* We cannot find the search string. Ding the bell. */
+ rl_ding ();
+ cxt->history_pos = cxt->last_found_line;
+rl_display_search (cxt->search_string, cxt->sflags, (cxt->history_pos == cxt->save_line) ? -1 : cxt->history_pos);
+ return 1;
+ }
+
+ /* We have found the search string. Just display it. But don't
+ actually move there in the history list until the user accepts
+ the location. */
+ if (cxt->sflags & SF_FOUND)
+ {
+ cxt->prev_line_found = cxt->lines[cxt->history_pos];
+ rl_replace_line (cxt->lines[cxt->history_pos], 0);
+ rl_point = cxt->sline_index;
+ cxt->last_found_line = cxt->history_pos;
+ rl_display_search (cxt->search_string, cxt->sflags, (cxt->history_pos == cxt->save_line) ? -1 : cxt->history_pos);
+ }
+
+ return 1;
+}
+
+static int
+_rl_isearch_cleanup (cxt, r)
+ _rl_search_cxt *cxt;
+ int r;
+{
+ if (r >= 0)
+ _rl_isearch_fini (cxt);
+ _rl_scxt_dispose (cxt, 0);
+ _rl_iscxt = 0;
+
+ RL_UNSETSTATE(RL_STATE_ISEARCH);
+
+ return (r != 0);
+}
+
+/* Search through the history looking for an interactively typed string.
+ This is analogous to i-search. We start the search in the current line.
+ DIRECTION is which direction to search; >= 0 means forward, < 0 means
+ backwards. */
+static int
+rl_search_history (direction, invoking_key)
+ int direction, invoking_key;
+{
+ _rl_search_cxt *cxt; /* local for now, but saved globally */
+ int c, r;
+
+ RL_SETSTATE(RL_STATE_ISEARCH);
+ cxt = _rl_isearch_init (direction);
+
+ rl_display_search (cxt->search_string, cxt->sflags, -1);
+
+ /* If we are using the callback interface, all we do is set up here and
+ return. The key is that we leave RL_STATE_ISEARCH set. */
+ if (RL_ISSTATE (RL_STATE_CALLBACK))
+ return (0);
+
+ r = -1;
+ for (;;)
+ {
+ c = _rl_search_getchar (cxt);
+ /* We might want to handle EOF here (c == 0) */
+ r = _rl_isearch_dispatch (cxt, cxt->lastc);
+ if (r <= 0)
+ break;
+ }
+
+ /* The searching is over. The user may have found the string that she
+ was looking for, or else she may have exited a failing search. If
+ LINE_INDEX is -1, then that shows that the string searched for was
+ not found. We use this to determine where to place rl_point. */
+ return (_rl_isearch_cleanup (cxt, r));
+}
+
+#if defined (READLINE_CALLBACKS)
+/* Called from the callback functions when we are ready to read a key. The
+ callback functions know to call this because RL_ISSTATE(RL_STATE_ISEARCH).
+ If _rl_isearch_dispatch finishes searching, this function is responsible
+ for turning off RL_STATE_ISEARCH, which it does using _rl_isearch_cleanup. */
+int
+_rl_isearch_callback (cxt)
+ _rl_search_cxt *cxt;
+{
+ int c, r;
+
+ c = _rl_search_getchar (cxt);
+ /* We might want to handle EOF here */
+ r = _rl_isearch_dispatch (cxt, cxt->lastc);
+
+ return (r <= 0) ? _rl_isearch_cleanup (cxt, r) : 0;
+}
+#endif
/* readline.c -- a general facility for reading lines of input
with emacs style editing and completion. */
-/* Copyright (C) 1987-2012 Free Software Foundation, Inc.
+/* Copyright (C) 1987-2013 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.
--- /dev/null
+/* readline.c -- a general facility for reading lines of input
+ with emacs style editing and completion. */
+
+/* Copyright (C) 1987-2012 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>
+#include "posixjmp.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"
+
+#if defined (__EMX__)
+# define INCL_DOSPROCESS
+# include <os2.h>
+#endif /* __EMX__ */
+
+/* Some standard library routines. */
+#include "readline.h"
+#include "history.h"
+
+#include "rlprivate.h"
+#include "rlshell.h"
+#include "xmalloc.h"
+
+#ifndef RL_LIBRARY_VERSION
+# define RL_LIBRARY_VERSION "5.1"
+#endif
+
+#ifndef RL_READLINE_VERSION
+# define RL_READLINE_VERSION 0x0501
+#endif
+
+extern void _rl_free_history_entry PARAMS((HIST_ENTRY *));
+
+/* Forward declarations used in this file. */
+static char *readline_internal PARAMS((void));
+static void readline_initialize_everything PARAMS((void));
+
+static void bind_arrow_keys_internal PARAMS((Keymap));
+static void bind_arrow_keys PARAMS((void));
+
+static void readline_default_bindings PARAMS((void));
+static void reset_default_bindings PARAMS((void));
+
+static int _rl_subseq_result PARAMS((int, Keymap, int, int));
+static int _rl_subseq_getchar PARAMS((int));
+
+/* **************************************************************** */
+/* */
+/* Line editing input utility */
+/* */
+/* **************************************************************** */
+
+const char *rl_library_version = RL_LIBRARY_VERSION;
+
+int rl_readline_version = RL_READLINE_VERSION;
+
+/* True if this is `real' readline as opposed to some stub substitute. */
+int rl_gnu_readline_p = 1;
+
+/* A pointer to the keymap that is currently in use.
+ By default, it is the standard emacs keymap. */
+Keymap _rl_keymap = emacs_standard_keymap;
+
+/* The current style of editing. */
+int rl_editing_mode = emacs_mode;
+
+/* The current insert mode: input (the default) or overwrite */
+int rl_insert_mode = RL_IM_DEFAULT;
+
+/* 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. */
+int rl_dispatching;
+
+/* Non-zero if the previous command was a kill command. */
+int _rl_last_command_was_kill = 0;
+
+/* The current value of the numeric argument specified by the user. */
+int rl_numeric_arg = 1;
+
+/* Non-zero if an argument was typed. */
+int rl_explicit_arg = 0;
+
+/* Temporary value used while generating the argument. */
+int rl_arg_sign = 1;
+
+/* Non-zero means we have been called at least once before. */
+static int rl_initialized;
+
+#if 0
+/* If non-zero, this program is running in an EMACS buffer. */
+static int running_in_emacs;
+#endif
+
+/* Flags word encapsulating the current readline state. */
+int rl_readline_state = RL_STATE_NONE;
+
+/* The current offset in the current input line. */
+int rl_point;
+
+/* Mark in the current input line. */
+int rl_mark;
+
+/* Length of the current input line. */
+int rl_end;
+
+/* Make this non-zero to return the current input_line. */
+int rl_done;
+
+/* The last function executed by readline. */
+rl_command_func_t *rl_last_func = (rl_command_func_t *)NULL;
+
+/* Top level environment for readline_internal (). */
+procenv_t _rl_top_level;
+
+/* The streams we interact with. */
+FILE *_rl_in_stream, *_rl_out_stream;
+
+/* The names of the streams that we do input and output to. */
+FILE *rl_instream = (FILE *)NULL;
+FILE *rl_outstream = (FILE *)NULL;
+
+/* Non-zero means echo characters as they are read. Defaults to no echo;
+ set to 1 if there is a controlling terminal, we can get its attributes,
+ and the attributes include `echo'. Look at rltty.c:prepare_terminal_settings
+ for the code that sets it. */
+int _rl_echoing_p = 0;
+
+/* Current prompt. */
+char *rl_prompt = (char *)NULL;
+int rl_visible_prompt_length = 0;
+
+/* Set to non-zero by calling application if it has already printed rl_prompt
+ and does not want readline to do it the first time. */
+int rl_already_prompted = 0;
+
+/* The number of characters read in order to type this complete command. */
+int rl_key_sequence_length = 0;
+
+/* If non-zero, then this is the address of a function to call just
+ before readline_internal_setup () prints the first prompt. */
+rl_hook_func_t *rl_startup_hook = (rl_hook_func_t *)NULL;
+
+/* 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. */
+rl_hook_func_t *rl_pre_input_hook = (rl_hook_func_t *)NULL;
+
+/* What we use internally. You should always refer to RL_LINE_BUFFER. */
+static char *the_line;
+
+/* The character that can generate an EOF. Really read from
+ the terminal driver... just defaulted here. */
+int _rl_eof_char = CTRL ('D');
+
+/* Non-zero makes this the next keystroke to read. */
+int rl_pending_input = 0;
+
+/* Pointer to a useful terminal name. */
+const char *rl_terminal_name = (const char *)NULL;
+
+/* Non-zero means to always use horizontal scrolling in line display. */
+int _rl_horizontal_scroll_mode = 0;
+
+/* Non-zero means to display an asterisk at the starts of history lines
+ which have been modified. */
+int _rl_mark_modified_lines = 0;
+
+/* The style of `bell' notification preferred. This can be set to NO_BELL,
+ AUDIBLE_BELL, or VISIBLE_BELL. */
+int _rl_bell_preference = AUDIBLE_BELL;
+
+/* String inserted into the line by rl_insert_comment (). */
+char *_rl_comment_begin;
+
+/* Keymap holding the function currently being executed. */
+Keymap rl_executing_keymap;
+
+/* Keymap we're currently using to dispatch. */
+Keymap _rl_dispatching_keymap;
+
+/* Non-zero means to erase entire line, including prompt, on empty input lines. */
+int rl_erase_empty_line = 0;
+
+/* Non-zero means to read only this many characters rather than up to a
+ character bound to accept-line. */
+int rl_num_chars_to_read;
+
+/* Line buffer and maintenence. */
+char *rl_line_buffer = (char *)NULL;
+int rl_line_buffer_len = 0;
+
+/* Key sequence `contexts' */
+_rl_keyseq_cxt *_rl_kscxt = 0;
+
+int rl_executing_key;
+char *rl_executing_keyseq = 0;
+int _rl_executing_keyseq_size = 0;
+
+/* Timeout (specified in milliseconds) when reading characters making up an
+ ambiguous multiple-key sequence */
+int _rl_keyseq_timeout = 500;
+
+#define RESIZE_KEYSEQ_BUFFER() \
+ do \
+ { \
+ if (rl_key_sequence_length + 2 >= _rl_executing_keyseq_size) \
+ { \
+ _rl_executing_keyseq_size += 16; \
+ rl_executing_keyseq = xrealloc (rl_executing_keyseq, _rl_executing_keyseq_size); \
+ } \
+ } \
+ while (0);
+
+/* Forward declarations used by the display, termcap, and history code. */
+
+/* **************************************************************** */
+/* */
+/* `Forward' declarations */
+/* */
+/* **************************************************************** */
+
+/* Non-zero means do not parse any lines other than comments and
+ parser directives. */
+unsigned char _rl_parsing_conditionalized_out = 0;
+
+/* Non-zero means to convert characters with the meta bit set to
+ escape-prefixed characters so we can indirect through
+ emacs_meta_keymap or vi_escape_keymap. */
+int _rl_convert_meta_chars_to_ascii = 1;
+
+/* Non-zero means to output characters with the meta bit set directly
+ rather than as a meta-prefixed escape sequence. */
+int _rl_output_meta_chars = 0;
+
+/* Non-zero means to look at the termios special characters and bind
+ them to equivalent readline functions at startup. */
+int _rl_bind_stty_chars = 1;
+
+/* Non-zero means to go through the history list at every newline (or
+ whenever rl_done is set and readline returns) and revert each line to
+ its initial state. */
+int _rl_revert_all_at_newline = 0;
+
+/* Non-zero means to honor the termios ECHOCTL bit and echo control
+ characters corresponding to keyboard-generated signals. */
+int _rl_echo_control_chars = 1;
+
+/* Non-zero means to prefix the displayed prompt with a character indicating
+ the editing mode: @ for emacs, : for vi-command, + for vi-insert. */
+int _rl_show_mode_in_prompt = 0;
+
+/* **************************************************************** */
+/* */
+/* Top Level Functions */
+/* */
+/* **************************************************************** */
+
+/* Non-zero means treat 0200 bit in terminal input as Meta bit. */
+int _rl_meta_flag = 0; /* Forward declaration */
+
+/* Set up the prompt and expand it. Called from readline() and
+ rl_callback_handler_install (). */
+int
+rl_set_prompt (prompt)
+ const char *prompt;
+{
+ FREE (rl_prompt);
+ rl_prompt = prompt ? savestring (prompt) : (char *)NULL;
+ rl_display_prompt = rl_prompt ? rl_prompt : "";
+
+ rl_visible_prompt_length = rl_expand_prompt (rl_prompt);
+ return 0;
+}
+
+/* Read a line of input. Prompt with PROMPT. An empty PROMPT means
+ none. A return value of NULL means that EOF was encountered. */
+char *
+readline (prompt)
+ const char *prompt;
+{
+ char *value;
+#if 0
+ int in_callback;
+#endif
+
+ /* If we are at EOF return a NULL string. */
+ if (rl_pending_input == EOF)
+ {
+ rl_clear_pending_input ();
+ return ((char *)NULL);
+ }
+
+#if 0
+ /* If readline() is called after installing a callback handler, temporarily
+ turn off the callback state to avoid ensuing messiness. Patch supplied
+ by the gdb folks. XXX -- disabled. This can be fooled and readline
+ left in a strange state by a poorly-timed longjmp. */
+ if (in_callback = RL_ISSTATE (RL_STATE_CALLBACK))
+ RL_UNSETSTATE (RL_STATE_CALLBACK);
+#endif
+
+ rl_set_prompt (prompt);
+
+ rl_initialize ();
+ if (rl_prep_term_function)
+ (*rl_prep_term_function) (_rl_meta_flag);
+
+#if defined (HANDLE_SIGNALS)
+ rl_set_signals ();
+#endif
+
+ value = readline_internal ();
+ if (rl_deprep_term_function)
+ (*rl_deprep_term_function) ();
+
+#if defined (HANDLE_SIGNALS)
+ rl_clear_signals ();
+#endif
+
+#if 0
+ if (in_callback)
+ RL_SETSTATE (RL_STATE_CALLBACK);
+#endif
+
+#if HAVE_DECL_AUDIT_TTY && defined (ENABLE_TTY_AUDIT_SUPPORT)
+ if (value)
+ _rl_audit_tty (value);
+#endif
+
+ return (value);
+}
+
+#if defined (READLINE_CALLBACKS)
+# define STATIC_CALLBACK
+#else
+# define STATIC_CALLBACK static
+#endif
+
+STATIC_CALLBACK void
+readline_internal_setup ()
+{
+ char *nprompt;
+
+ _rl_in_stream = rl_instream;
+ _rl_out_stream = rl_outstream;
+
+ /* Enable the meta key only for the duration of readline(), if this
+ terminal has one and the terminal has been initialized */
+ if (_rl_enable_meta & RL_ISSTATE (RL_STATE_TERMPREPPED))
+ _rl_enable_meta_key ();
+
+ if (rl_startup_hook)
+ (*rl_startup_hook) ();
+
+#if defined (VI_MODE)
+ if (rl_editing_mode == vi_mode)
+ rl_vi_insertion_mode (1, 'i'); /* don't want to reset last */
+#endif /* VI_MODE */
+
+ /* If we're not echoing, we still want to at least print a prompt, because
+ rl_redisplay will not do it for us. If the calling application has a
+ custom redisplay function, though, let that function handle it. */
+ if (_rl_echoing_p == 0 && rl_redisplay_function == rl_redisplay)
+ {
+ if (rl_prompt && rl_already_prompted == 0)
+ {
+ nprompt = _rl_strip_prompt (rl_prompt);
+ fprintf (_rl_out_stream, "%s", nprompt);
+ fflush (_rl_out_stream);
+ xfree (nprompt);
+ }
+ }
+ else
+ {
+ if (rl_prompt && rl_already_prompted)
+ rl_on_new_line_with_prompt ();
+ else
+ rl_on_new_line ();
+ (*rl_redisplay_function) ();
+ }
+
+ if (rl_pre_input_hook)
+ (*rl_pre_input_hook) ();
+
+ RL_CHECK_SIGNALS ();
+}
+
+STATIC_CALLBACK char *
+readline_internal_teardown (eof)
+ int eof;
+{
+ char *temp;
+ HIST_ENTRY *entry;
+
+ RL_CHECK_SIGNALS ();
+
+ /* Restore the original of this history line, iff the line that we
+ are editing was originally in the history, AND the line has changed. */
+ entry = current_history ();
+
+ if (entry && rl_undo_list)
+ {
+ temp = savestring (the_line);
+ rl_revert_line (1, 0);
+ entry = replace_history_entry (where_history (), the_line, (histdata_t)NULL);
+ _rl_free_history_entry (entry);
+
+ strcpy (the_line, temp);
+ xfree (temp);
+ }
+
+ if (_rl_revert_all_at_newline)
+ _rl_revert_all_lines ();
+
+ /* At any rate, it is highly likely that this line has an undo list. Get
+ rid of it now. */
+ if (rl_undo_list)
+ rl_free_undo_list ();
+
+ /* Disable the meta key, if this terminal has one and we were told to use it.
+ The check whether or not we sent the enable string is in
+ _rl_disable_meta_key(); the flag is set in _rl_enable_meta_key */
+ _rl_disable_meta_key ();
+
+ /* Restore normal cursor, if available. */
+ _rl_set_insert_mode (RL_IM_INSERT, 0);
+
+ return (eof ? (char *)NULL : savestring (the_line));
+}
+
+void
+_rl_internal_char_cleanup ()
+{
+#if defined (VI_MODE)
+ /* In vi mode, when you exit insert mode, the cursor moves back
+ over the previous character. We explicitly check for that here. */
+ if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap)
+ rl_vi_check ();
+#endif /* VI_MODE */
+
+ if (rl_num_chars_to_read && rl_end >= rl_num_chars_to_read)
+ {
+ (*rl_redisplay_function) ();
+ _rl_want_redisplay = 0;
+ rl_newline (1, '\n');
+ }
+
+ if (rl_done == 0)
+ {
+ (*rl_redisplay_function) ();
+ _rl_want_redisplay = 0;
+ }
+
+ /* If the application writer has told us to erase the entire line if
+ the only character typed was something bound to rl_newline, do so. */
+ if (rl_erase_empty_line && rl_done && rl_last_func == rl_newline &&
+ rl_point == 0 && rl_end == 0)
+ _rl_erase_entire_line ();
+}
+
+STATIC_CALLBACK int
+#if defined (READLINE_CALLBACKS)
+readline_internal_char ()
+#else
+readline_internal_charloop ()
+#endif
+{
+ static int lastc, eof_found;
+ int c, code, lk;
+
+ lastc = -1;
+ eof_found = 0;
+
+#if !defined (READLINE_CALLBACKS)
+ while (rl_done == 0)
+ {
+#endif
+ lk = _rl_last_command_was_kill;
+
+#if defined (HAVE_POSIX_SIGSETJMP)
+ code = sigsetjmp (_rl_top_level, 0);
+#else
+ code = setjmp (_rl_top_level);
+#endif
+
+ if (code)
+ {
+ (*rl_redisplay_function) ();
+ _rl_want_redisplay = 0;
+ /* If we get here, we're not being called from something dispatched
+ from _rl_callback_read_char(), which sets up its own value of
+ _rl_top_level (saving and restoring the old, of course), so
+ we can just return here. */
+ if (RL_ISSTATE (RL_STATE_CALLBACK))
+ return (0);
+ }
+
+ if (rl_pending_input == 0)
+ {
+ /* Then initialize the argument and number of keys read. */
+ _rl_reset_argument ();
+ rl_key_sequence_length = 0;
+ rl_executing_keyseq[0] = 0;
+ }
+
+ RL_SETSTATE(RL_STATE_READCMD);
+ c = rl_read_key ();
+ RL_UNSETSTATE(RL_STATE_READCMD);
+
+ /* look at input.c:rl_getc() for the circumstances under which this will
+ be returned; punt immediately on read error without converting it to
+ a newline; assume that rl_read_key has already called the signal
+ handler. */
+ if (c == READERR)
+ {
+#if defined (READLINE_CALLBACKS)
+ RL_SETSTATE(RL_STATE_DONE);
+ return (rl_done = 1);
+#else
+ eof_found = 1;
+ break;
+#endif
+ }
+
+ /* EOF typed to a non-blank line is a <NL>. If we want to change this,
+ to force any existing line to be ignored when read(2) reads EOF,
+ for example, this is the place to change. */
+ if (c == EOF && rl_end)
+ c = NEWLINE;
+
+ /* The character _rl_eof_char typed to blank line, and not as the
+ previous character is interpreted as EOF. */
+ if (((c == _rl_eof_char && lastc != c) || c == EOF) && !rl_end)
+ {
+#if defined (READLINE_CALLBACKS)
+ RL_SETSTATE(RL_STATE_DONE);
+ return (rl_done = 1);
+#else
+ eof_found = 1;
+ break;
+#endif
+ }
+
+ lastc = c;
+ _rl_dispatch ((unsigned char)c, _rl_keymap);
+ RL_CHECK_SIGNALS ();
+
+ /* If there was no change in _rl_last_command_was_kill, then no kill
+ has taken place. Note that if input is pending we are reading
+ a prefix command, so nothing has changed yet. */
+ if (rl_pending_input == 0 && lk == _rl_last_command_was_kill)
+ _rl_last_command_was_kill = 0;
+
+ _rl_internal_char_cleanup ();
+
+#if defined (READLINE_CALLBACKS)
+ return 0;
+#else
+ }
+
+ return (eof_found);
+#endif
+}
+
+#if defined (READLINE_CALLBACKS)
+static int
+readline_internal_charloop ()
+{
+ int eof = 1;
+
+ while (rl_done == 0)
+ eof = readline_internal_char ();
+ return (eof);
+}
+#endif /* READLINE_CALLBACKS */
+
+/* Read a line of input from the global rl_instream, doing output on
+ the global rl_outstream.
+ If rl_prompt is non-null, then that is our prompt. */
+static char *
+readline_internal ()
+{
+ int eof;
+
+ readline_internal_setup ();
+ eof = readline_internal_charloop ();
+ return (readline_internal_teardown (eof));
+}
+
+void
+_rl_init_line_state ()
+{
+ rl_point = rl_end = rl_mark = 0;
+ the_line = rl_line_buffer;
+ the_line[0] = 0;
+}
+
+void
+_rl_set_the_line ()
+{
+ the_line = rl_line_buffer;
+}
+
+#if defined (READLINE_CALLBACKS)
+_rl_keyseq_cxt *
+_rl_keyseq_cxt_alloc ()
+{
+ _rl_keyseq_cxt *cxt;
+
+ cxt = (_rl_keyseq_cxt *)xmalloc (sizeof (_rl_keyseq_cxt));
+
+ cxt->flags = cxt->subseq_arg = cxt->subseq_retval = 0;
+
+ cxt->okey = 0;
+ cxt->ocxt = _rl_kscxt;
+ cxt->childval = 42; /* sentinel value */
+
+ return cxt;
+}
+
+void
+_rl_keyseq_cxt_dispose (cxt)
+ _rl_keyseq_cxt *cxt;
+{
+ xfree (cxt);
+}
+
+void
+_rl_keyseq_chain_dispose ()
+{
+ _rl_keyseq_cxt *cxt;
+
+ while (_rl_kscxt)
+ {
+ cxt = _rl_kscxt;
+ _rl_kscxt = _rl_kscxt->ocxt;
+ _rl_keyseq_cxt_dispose (cxt);
+ }
+}
+#endif
+
+static int
+_rl_subseq_getchar (key)
+ int key;
+{
+ int k;
+
+ if (key == ESC)
+ RL_SETSTATE(RL_STATE_METANEXT);
+ RL_SETSTATE(RL_STATE_MOREINPUT);
+ k = rl_read_key ();
+ RL_UNSETSTATE(RL_STATE_MOREINPUT);
+ if (key == ESC)
+ RL_UNSETSTATE(RL_STATE_METANEXT);
+
+ return k;
+}
+
+#if defined (READLINE_CALLBACKS)
+int
+_rl_dispatch_callback (cxt)
+ _rl_keyseq_cxt *cxt;
+{
+ int nkey, r;
+
+ /* For now */
+ /* The first time this context is used, we want to read input and dispatch
+ on it. When traversing the chain of contexts back `up', we want to use
+ the value from the next context down. We're simulating recursion using
+ a chain of contexts. */
+ if ((cxt->flags & KSEQ_DISPATCHED) == 0)
+ {
+ nkey = _rl_subseq_getchar (cxt->okey);
+ if (nkey < 0)
+ {
+ _rl_abort_internal ();
+ return -1;
+ }
+ r = _rl_dispatch_subseq (nkey, cxt->dmap, cxt->subseq_arg);
+ cxt->flags |= KSEQ_DISPATCHED;
+ }
+ else
+ r = cxt->childval;
+
+ /* For now */
+ if (r != -3) /* don't do this if we indicate there will be other matches */
+ r = _rl_subseq_result (r, cxt->oldmap, cxt->okey, (cxt->flags & KSEQ_SUBSEQ));
+
+ RL_CHECK_SIGNALS ();
+ if (r == 0) /* success! */
+ {
+ _rl_keyseq_chain_dispose ();
+ RL_UNSETSTATE (RL_STATE_MULTIKEY);
+ return r;
+ }
+
+ if (r != -3) /* magic value that says we added to the chain */
+ _rl_kscxt = cxt->ocxt;
+ if (_rl_kscxt)
+ _rl_kscxt->childval = r;
+ if (r != -3)
+ _rl_keyseq_cxt_dispose (cxt);
+
+ return r;
+}
+#endif /* READLINE_CALLBACKS */
+
+/* Do the command associated with KEY in MAP.
+ If the associated command is really a keymap, then read
+ another key, and dispatch into that map. */
+int
+_rl_dispatch (key, map)
+ register int key;
+ Keymap map;
+{
+ _rl_dispatching_keymap = map;
+ return _rl_dispatch_subseq (key, map, 0);
+}
+
+int
+_rl_dispatch_subseq (key, map, got_subseq)
+ register int key;
+ Keymap map;
+ int got_subseq;
+{
+ int r, newkey;
+ char *macro;
+ rl_command_func_t *func;
+#if defined (READLINE_CALLBACKS)
+ _rl_keyseq_cxt *cxt;
+#endif
+
+ if (META_CHAR (key) && _rl_convert_meta_chars_to_ascii)
+ {
+ if (map[ESC].type == ISKMAP)
+ {
+ if (RL_ISSTATE (RL_STATE_MACRODEF))
+ _rl_add_macro_char (ESC);
+ RESIZE_KEYSEQ_BUFFER ();
+ rl_executing_keyseq[rl_key_sequence_length++] = ESC;
+ map = FUNCTION_TO_KEYMAP (map, ESC);
+ key = UNMETA (key);
+ return (_rl_dispatch (key, map));
+ }
+ else
+ rl_ding ();
+ return 0;
+ }
+
+ if (RL_ISSTATE (RL_STATE_MACRODEF))
+ _rl_add_macro_char (key);
+
+ r = 0;
+ switch (map[key].type)
+ {
+ case ISFUNC:
+ func = map[key].function;
+ if (func)
+ {
+ /* Special case rl_do_lowercase_version (). */
+ if (func == rl_do_lowercase_version)
+ /* Should we do anything special if key == ANYOTHERKEY? */
+ return (_rl_dispatch (_rl_to_lower (key), map));
+
+ rl_executing_keymap = map;
+ rl_executing_key = key;
+
+ RESIZE_KEYSEQ_BUFFER();
+ rl_executing_keyseq[rl_key_sequence_length++] = key;
+ rl_executing_keyseq[rl_key_sequence_length] = '\0';
+
+ rl_dispatching = 1;
+ RL_SETSTATE(RL_STATE_DISPATCHING);
+ r = (*func) (rl_numeric_arg * rl_arg_sign, key);
+ RL_UNSETSTATE(RL_STATE_DISPATCHING);
+ rl_dispatching = 0;
+
+ /* If we have input pending, then the last command was a prefix
+ command. Don't change the state of rl_last_func. Otherwise,
+ remember the last command executed in this variable. */
+ if (rl_pending_input == 0 && map[key].function != rl_digit_argument)
+ rl_last_func = map[key].function;
+
+ RL_CHECK_SIGNALS ();
+ }
+ else if (map[ANYOTHERKEY].function)
+ {
+ /* OK, there's no function bound in this map, but there is a
+ shadow function that was overridden when the current keymap
+ was created. Return -2 to note that. */
+ if (RL_ISSTATE (RL_STATE_MACROINPUT))
+ _rl_prev_macro_key ();
+ else
+ _rl_unget_char (key);
+ return -2;
+ }
+ else if (got_subseq)
+ {
+ /* Return -1 to note that we're in a subsequence, but we don't
+ have a matching key, nor was one overridden. This means
+ we need to back up the recursion chain and find the last
+ subsequence that is bound to a function. */
+ if (RL_ISSTATE (RL_STATE_MACROINPUT))
+ _rl_prev_macro_key ();
+ else
+ _rl_unget_char (key);
+ return -1;
+ }
+ else
+ {
+#if defined (READLINE_CALLBACKS)
+ RL_UNSETSTATE (RL_STATE_MULTIKEY);
+ _rl_keyseq_chain_dispose ();
+#endif
+ _rl_abort_internal ();
+ return -1;
+ }
+ break;
+
+ case ISKMAP:
+ if (map[key].function != 0)
+ {
+#if defined (VI_MODE)
+ /* The only way this test will be true is if a subsequence has been
+ bound starting with ESC, generally the arrow keys. What we do is
+ check whether there's input in the queue, which there generally
+ will be if an arrow key has been pressed, and, if there's not,
+ just dispatch to (what we assume is) rl_vi_movement_mode right
+ away. This is essentially an input test with a zero timeout (by
+ default) or a timeout determined by the value of `keyseq-timeout' */
+ /* _rl_keyseq_timeout specified in milliseconds; _rl_input_queued
+ takes microseconds, so multiply by 1000 */
+ if (rl_editing_mode == vi_mode && key == ESC && map == vi_insertion_keymap
+ && _rl_input_queued ((_rl_keyseq_timeout > 0) ? _rl_keyseq_timeout*1000 : 0) == 0)
+ return (_rl_dispatch (ANYOTHERKEY, FUNCTION_TO_KEYMAP (map, key)));
+#endif
+
+ RESIZE_KEYSEQ_BUFFER ();
+ rl_executing_keyseq[rl_key_sequence_length++] = key;
+ _rl_dispatching_keymap = FUNCTION_TO_KEYMAP (map, key);
+
+ /* Allocate new context here. Use linked contexts (linked through
+ cxt->ocxt) to simulate recursion */
+#if defined (READLINE_CALLBACKS)
+ if (RL_ISSTATE (RL_STATE_CALLBACK))
+ {
+ /* Return 0 only the first time, to indicate success to
+ _rl_callback_read_char. The rest of the time, we're called
+ from _rl_dispatch_callback, so we return -3 to indicate
+ special handling is necessary. */
+ r = RL_ISSTATE (RL_STATE_MULTIKEY) ? -3 : 0;
+ cxt = _rl_keyseq_cxt_alloc ();
+
+ if (got_subseq)
+ cxt->flags |= KSEQ_SUBSEQ;
+ cxt->okey = key;
+ cxt->oldmap = map;
+ cxt->dmap = _rl_dispatching_keymap;
+ cxt->subseq_arg = got_subseq || cxt->dmap[ANYOTHERKEY].function;
+
+ RL_SETSTATE (RL_STATE_MULTIKEY);
+ _rl_kscxt = cxt;
+
+ return r; /* don't indicate immediate success */
+ }
+#endif
+
+ /* Tentative inter-character timeout for potential multi-key
+ sequences? If no input within timeout, abort sequence and
+ act as if we got non-matching input. */
+ /* _rl_keyseq_timeout specified in milliseconds; _rl_input_queued
+ takes microseconds, so multiply by 1000 */
+ if (_rl_keyseq_timeout > 0 &&
+ (RL_ISSTATE (RL_STATE_INPUTPENDING|RL_STATE_MACROINPUT) == 0) &&
+ _rl_pushed_input_available () == 0 &&
+ _rl_dispatching_keymap[ANYOTHERKEY].function &&
+ _rl_input_queued (_rl_keyseq_timeout*1000) == 0)
+ return (_rl_subseq_result (-2, map, key, got_subseq));
+
+ newkey = _rl_subseq_getchar (key);
+ if (newkey < 0)
+ {
+ _rl_abort_internal ();
+ return -1;
+ }
+
+ r = _rl_dispatch_subseq (newkey, _rl_dispatching_keymap, got_subseq || map[ANYOTHERKEY].function);
+ return _rl_subseq_result (r, map, key, got_subseq);
+ }
+ else
+ {
+ _rl_abort_internal ();
+ return -1;
+ }
+ break;
+
+ case ISMACR:
+ if (map[key].function != 0)
+ {
+ rl_executing_keyseq[rl_key_sequence_length] = '\0';
+ macro = savestring ((char *)map[key].function);
+ _rl_with_macro_input (macro);
+ return 0;
+ }
+ break;
+ }
+#if defined (VI_MODE)
+ if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap &&
+ key != ANYOTHERKEY &&
+ rl_key_sequence_length == 1 && /* XXX */
+ _rl_vi_textmod_command (key))
+ _rl_vi_set_last (key, rl_numeric_arg, rl_arg_sign);
+#endif
+
+ return (r);
+}
+
+static int
+_rl_subseq_result (r, map, key, got_subseq)
+ int r;
+ Keymap map;
+ int key, got_subseq;
+{
+ Keymap m;
+ int type, nt;
+ rl_command_func_t *func, *nf;
+
+ if (r == -2)
+ /* We didn't match anything, and the keymap we're indexed into
+ shadowed a function previously bound to that prefix. Call
+ the function. The recursive call to _rl_dispatch_subseq has
+ already taken care of pushing any necessary input back onto
+ the input queue with _rl_unget_char. */
+ {
+ m = _rl_dispatching_keymap;
+ type = m[ANYOTHERKEY].type;
+ func = m[ANYOTHERKEY].function;
+ if (type == ISFUNC && func == rl_do_lowercase_version)
+ r = _rl_dispatch (_rl_to_lower (key), map);
+ else if (type == ISFUNC && func == rl_insert)
+ {
+ /* If the function that was shadowed was self-insert, we
+ somehow need a keymap with map[key].func == self-insert.
+ Let's use this one. */
+ nt = m[key].type;
+ nf = m[key].function;
+
+ m[key].type = type;
+ m[key].function = func;
+ r = _rl_dispatch (key, m);
+ m[key].type = nt;
+ m[key].function = nf;
+ }
+ else
+ r = _rl_dispatch (ANYOTHERKEY, m);
+ }
+ else if (r && map[ANYOTHERKEY].function)
+ {
+ /* We didn't match (r is probably -1), so return something to
+ tell the caller that it should try ANYOTHERKEY for an
+ overridden function. */
+ if (RL_ISSTATE (RL_STATE_MACROINPUT))
+ _rl_prev_macro_key ();
+ else
+ _rl_unget_char (key);
+ _rl_dispatching_keymap = map;
+ return -2;
+ }
+ else if (r && got_subseq)
+ {
+ /* OK, back up the chain. */
+ if (RL_ISSTATE (RL_STATE_MACROINPUT))
+ _rl_prev_macro_key ();
+ else
+ _rl_unget_char (key);
+ _rl_dispatching_keymap = map;
+ return -1;
+ }
+
+ return r;
+}
+
+/* **************************************************************** */
+/* */
+/* Initializations */
+/* */
+/* **************************************************************** */
+
+/* Initialize readline (and terminal if not already). */
+int
+rl_initialize ()
+{
+ /* If we have never been called before, initialize the
+ terminal and data structures. */
+ if (!rl_initialized)
+ {
+ RL_SETSTATE(RL_STATE_INITIALIZING);
+ readline_initialize_everything ();
+ RL_UNSETSTATE(RL_STATE_INITIALIZING);
+ rl_initialized++;
+ RL_SETSTATE(RL_STATE_INITIALIZED);
+ }
+
+ /* Initalize the current line information. */
+ _rl_init_line_state ();
+
+ /* We aren't done yet. We haven't even gotten started yet! */
+ rl_done = 0;
+ RL_UNSETSTATE(RL_STATE_DONE);
+
+ /* Tell the history routines what is going on. */
+ _rl_start_using_history ();
+
+ /* Make the display buffer match the state of the line. */
+ rl_reset_line_state ();
+
+ /* No such function typed yet. */
+ rl_last_func = (rl_command_func_t *)NULL;
+
+ /* Parsing of key-bindings begins in an enabled state. */
+ _rl_parsing_conditionalized_out = 0;
+
+#if defined (VI_MODE)
+ if (rl_editing_mode == vi_mode)
+ _rl_vi_initialize_line ();
+#endif
+
+ /* Each line starts in insert mode (the default). */
+ _rl_set_insert_mode (RL_IM_DEFAULT, 1);
+
+ return 0;
+}
+
+#if 0
+#if defined (__EMX__)
+static void
+_emx_build_environ ()
+{
+ TIB *tibp;
+ PIB *pibp;
+ char *t, **tp;
+ int c;
+
+ DosGetInfoBlocks (&tibp, &pibp);
+ t = pibp->pib_pchenv;
+ for (c = 1; *t; c++)
+ t += strlen (t) + 1;
+ tp = environ = (char **)xmalloc ((c + 1) * sizeof (char *));
+ t = pibp->pib_pchenv;
+ while (*t)
+ {
+ *tp++ = t;
+ t += strlen (t) + 1;
+ }
+ *tp = 0;
+}
+#endif /* __EMX__ */
+#endif
+
+/* Initialize the entire state of the world. */
+static void
+readline_initialize_everything ()
+{
+#if 0
+#if defined (__EMX__)
+ if (environ == 0)
+ _emx_build_environ ();
+#endif
+#endif
+
+#if 0
+ /* Find out if we are running in Emacs -- UNUSED. */
+ running_in_emacs = sh_get_env_value ("EMACS") != (char *)0;
+#endif
+
+ /* Set up input and output if they are not already set up. */
+ if (!rl_instream)
+ rl_instream = stdin;
+
+ if (!rl_outstream)
+ rl_outstream = stdout;
+
+ /* Bind _rl_in_stream and _rl_out_stream immediately. These values
+ may change, but they may also be used before readline_internal ()
+ is called. */
+ _rl_in_stream = rl_instream;
+ _rl_out_stream = rl_outstream;
+
+ /* Allocate data structures. */
+ if (rl_line_buffer == 0)
+ rl_line_buffer = (char *)xmalloc (rl_line_buffer_len = DEFAULT_BUFFER_SIZE);
+
+ /* Initialize the terminal interface. */
+ if (rl_terminal_name == 0)
+ rl_terminal_name = sh_get_env_value ("TERM");
+ _rl_init_terminal_io (rl_terminal_name);
+
+ /* Bind tty characters to readline functions. */
+ readline_default_bindings ();
+
+ /* Initialize the function names. */
+ rl_initialize_funmap ();
+
+ /* Decide whether we should automatically go into eight-bit mode. */
+ _rl_init_eightbit ();
+
+ /* Read in the init file. */
+ rl_read_init_file ((char *)NULL);
+
+ /* XXX */
+ if (_rl_horizontal_scroll_mode && _rl_term_autowrap)
+ {
+ _rl_screenwidth--;
+ _rl_screenchars -= _rl_screenheight;
+ }
+
+ /* Override the effect of any `set keymap' assignments in the
+ inputrc file. */
+ rl_set_keymap_from_edit_mode ();
+
+ /* Try to bind a common arrow key prefix, if not already bound. */
+ bind_arrow_keys ();
+
+ /* If the completion parser's default word break characters haven't
+ been set yet, then do so now. */
+ if (rl_completer_word_break_characters == (char *)NULL)
+ rl_completer_word_break_characters = (char *)rl_basic_word_break_characters;
+
+#if defined (COLOR_SUPPORT)
+ if (_rl_colored_stats)
+ _rl_parse_colors ();
+#endif
+
+ rl_executing_keyseq = malloc (_rl_executing_keyseq_size = 16);
+ if (rl_executing_keyseq)
+ rl_executing_keyseq[0] = '\0';
+}
+
+/* If this system allows us to look at the values of the regular
+ input editing characters, then bind them to their readline
+ equivalents, iff the characters are not bound to keymaps. */
+static void
+readline_default_bindings ()
+{
+ if (_rl_bind_stty_chars)
+ rl_tty_set_default_bindings (_rl_keymap);
+}
+
+/* Reset the default bindings for the terminal special characters we're
+ interested in back to rl_insert and read the new ones. */
+static void
+reset_default_bindings ()
+{
+ if (_rl_bind_stty_chars)
+ {
+ rl_tty_unset_default_bindings (_rl_keymap);
+ rl_tty_set_default_bindings (_rl_keymap);
+ }
+}
+
+/* Bind some common arrow key sequences in MAP. */
+static void
+bind_arrow_keys_internal (map)
+ Keymap map;
+{
+ Keymap xkeymap;
+
+ xkeymap = _rl_keymap;
+ _rl_keymap = map;
+
+#if defined (__MSDOS__)
+ rl_bind_keyseq_if_unbound ("\033[0A", rl_get_previous_history);
+ rl_bind_keyseq_if_unbound ("\033[0B", rl_backward_char);
+ rl_bind_keyseq_if_unbound ("\033[0C", rl_forward_char);
+ rl_bind_keyseq_if_unbound ("\033[0D", rl_get_next_history);
+#endif
+
+ rl_bind_keyseq_if_unbound ("\033[A", rl_get_previous_history);
+ rl_bind_keyseq_if_unbound ("\033[B", rl_get_next_history);
+ rl_bind_keyseq_if_unbound ("\033[C", rl_forward_char);
+ rl_bind_keyseq_if_unbound ("\033[D", rl_backward_char);
+ rl_bind_keyseq_if_unbound ("\033[H", rl_beg_of_line);
+ rl_bind_keyseq_if_unbound ("\033[F", rl_end_of_line);
+
+ rl_bind_keyseq_if_unbound ("\033OA", rl_get_previous_history);
+ rl_bind_keyseq_if_unbound ("\033OB", rl_get_next_history);
+ rl_bind_keyseq_if_unbound ("\033OC", rl_forward_char);
+ rl_bind_keyseq_if_unbound ("\033OD", rl_backward_char);
+ rl_bind_keyseq_if_unbound ("\033OH", rl_beg_of_line);
+ rl_bind_keyseq_if_unbound ("\033OF", rl_end_of_line);
+
+#if defined (__MINGW32__)
+ rl_bind_keyseq_if_unbound ("\340H", rl_get_previous_history);
+ rl_bind_keyseq_if_unbound ("\340P", rl_get_next_history);
+ rl_bind_keyseq_if_unbound ("\340M", rl_forward_char);
+ rl_bind_keyseq_if_unbound ("\340K", rl_backward_char);
+ rl_bind_keyseq_if_unbound ("\340G", rl_beg_of_line);
+ rl_bind_keyseq_if_unbound ("\340O", rl_end_of_line);
+ rl_bind_keyseq_if_unbound ("\340S", rl_delete);
+ rl_bind_keyseq_if_unbound ("\340R", rl_overwrite_mode);
+#endif
+
+ _rl_keymap = xkeymap;
+}
+
+/* Try and bind the common arrow key prefixes after giving termcap and
+ the inputrc file a chance to bind them and create `real' keymaps
+ for the arrow key prefix. */
+static void
+bind_arrow_keys ()
+{
+ bind_arrow_keys_internal (emacs_standard_keymap);
+
+#if defined (VI_MODE)
+ bind_arrow_keys_internal (vi_movement_keymap);
+ /* Unbind vi_movement_keymap[ESC] to allow users to repeatedly hit ESC
+ in vi command mode while still allowing the arrow keys to work. */
+ if (vi_movement_keymap[ESC].type == ISKMAP)
+ rl_bind_keyseq_in_map ("\033", (rl_command_func_t *)NULL, vi_movement_keymap);
+ bind_arrow_keys_internal (vi_insertion_keymap);
+#endif
+}
+
+/* **************************************************************** */
+/* */
+/* Saving and Restoring Readline's state */
+/* */
+/* **************************************************************** */
+
+int
+rl_save_state (sp)
+ struct readline_state *sp;
+{
+ if (sp == 0)
+ return -1;
+
+ sp->point = rl_point;
+ sp->end = rl_end;
+ sp->mark = rl_mark;
+ sp->buffer = rl_line_buffer;
+ sp->buflen = rl_line_buffer_len;
+ sp->ul = rl_undo_list;
+ sp->prompt = rl_prompt;
+
+ sp->rlstate = rl_readline_state;
+ sp->done = rl_done;
+ sp->kmap = _rl_keymap;
+
+ sp->lastfunc = rl_last_func;
+ sp->insmode = rl_insert_mode;
+ sp->edmode = rl_editing_mode;
+ sp->kseqlen = rl_key_sequence_length;
+ sp->inf = rl_instream;
+ sp->outf = rl_outstream;
+ sp->pendingin = rl_pending_input;
+ sp->macro = rl_executing_macro;
+
+ sp->catchsigs = rl_catch_signals;
+ sp->catchsigwinch = rl_catch_sigwinch;
+
+ return (0);
+}
+
+int
+rl_restore_state (sp)
+ struct readline_state *sp;
+{
+ if (sp == 0)
+ return -1;
+
+ rl_point = sp->point;
+ rl_end = sp->end;
+ rl_mark = sp->mark;
+ the_line = rl_line_buffer = sp->buffer;
+ rl_line_buffer_len = sp->buflen;
+ rl_undo_list = sp->ul;
+ rl_prompt = sp->prompt;
+
+ rl_readline_state = sp->rlstate;
+ rl_done = sp->done;
+ _rl_keymap = sp->kmap;
+
+ rl_last_func = sp->lastfunc;
+ rl_insert_mode = sp->insmode;
+ rl_editing_mode = sp->edmode;
+ rl_key_sequence_length = sp->kseqlen;
+ rl_instream = sp->inf;
+ rl_outstream = sp->outf;
+ rl_pending_input = sp->pendingin;
+ rl_executing_macro = sp->macro;
+
+ rl_catch_signals = sp->catchsigs;
+ rl_catch_sigwinch = sp->catchsigwinch;
+
+ return (0);
+}
f &= ~W_ASSNGLOBAL;
fprintf (stderr, "W_ASSNGLOBAL%s", f ? "|" : "");
}
+ if (f & W_ASSIGNINT)
+ {
+ f &= ~W_ASSIGNINT;
+ fprintf (stderr, "W_ASSIGNINT%s", f ? "|" : "");
+ }
if (f & W_COMPASSIGN)
{
f &= ~W_COMPASSIGN;
if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG))
{
int t;
+ char opts[8], opti;
+
+ opti = 0;
+ if (tlist->word->flags & (W_ASSIGNASSOC|W_ASSNGLOBAL|W_ASSIGNARRAY))
+ opts[opti++] = '-';
if ((tlist->word->flags & (W_ASSIGNASSOC|W_ASSNGLOBAL)) == (W_ASSIGNASSOC|W_ASSNGLOBAL))
- make_internal_declare (tlist->word->word, "-gA");
+ {
+ opts[opti++] = 'g';
+ opts[opti++] = 'A';
+ }
else if (tlist->word->flags & W_ASSIGNASSOC)
- make_internal_declare (tlist->word->word, "-A");
+ opts[opti++] = 'A';
else if ((tlist->word->flags & (W_ASSIGNARRAY|W_ASSNGLOBAL)) == (W_ASSIGNARRAY|W_ASSNGLOBAL))
- make_internal_declare (tlist->word->word, "-ga");
+ {
+ opts[opti++] = 'g';
+ opts[opti++] = 'a';
+ }
else if (tlist->word->flags & W_ASSIGNARRAY)
- make_internal_declare (tlist->word->word, "-a");
+ opts[opti++] = 'a';
else if (tlist->word->flags & W_ASSNGLOBAL)
- make_internal_declare (tlist->word->word, "-g");
+ opts[opti++] = 'g';
+
+#if 0
+ /* If we have special handling note the integer attribute */
+ if (opti > 0 && (tlist->word->flags & W_ASSIGNINT))
+ opts[opti++] = 'i';
+#endif
+
+ opts[opti] = '\0';
+ if (opti > 0)
+ make_internal_declare (tlist->word->word, opts);
t = do_word_assignment (tlist->word, 0);
if (t == 0)
--- /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) 1987-2013 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];
+int ifs_is_set, ifs_is_null;
+
+#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;
+extern int builtin_ignoring_errexit;
+
+#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 char *parameter_brace_find_indir __P((char *, int, int, int));
+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_ASSIGNARRAY)
+ {
+ f &= ~W_ASSIGNARRAY;
+ fprintf (stderr, "W_ASSIGNARRAY%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_ASSNGLOBAL)
+ {
+ f &= ~W_ASSNGLOBAL;
+ fprintf (stderr, "W_ASSNGLOBAL%s", f ? "|" : "");
+ }
+ if (f & W_ASSIGNINT)
+ {
+ f &= ~W_ASSIGNINT;
+ fprintf (stderr, "W_ASSIGNINT%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_NOSPLIT)
+ {
+ f &= ~W_NOSPLIT;
+ fprintf (stderr, "W_NOSPLIT%s", f ? "|" : "");
+ }
+ if (f & W_NOBRACE)
+ {
+ f &= ~W_NOBRACE;
+ fprintf (stderr, "W_NOBRACE%s", f ? "|" : "");
+ }
+ if (f & W_NOGLOB)
+ {
+ f &= ~W_NOGLOB;
+ fprintf (stderr, "W_NOGLOB%s", f ? "|" : "");
+ }
+ if (f & W_SPLITSPACE)
+ {
+ f &= ~W_SPLITSPACE;
+ fprintf (stderr, "W_SPLITSPACE%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)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ report_error (_("bad substitution: no closing `%s' in %s"), closer, string);
+ 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;
+ }
+
+ /* 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 > 42 && 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;
+ }
+
+ /* 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_QUOTE2; /* XXX */
+ 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)
+ { /* { */
+ last_command_exit_value = EXECUTION_FAILURE;
+ report_error (_("bad substitution: no closing `%s' in %s"), "}", string);
+ 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);
+ free (temp); /* no SX_ALLOC here */
+ 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;
+
+ FREE (d2);
+
+ 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, mkglobal;
+ WORD_LIST *list;
+
+ mklocal = flags & ASS_MKLOCAL;
+ mkassoc = flags & ASS_MKASSOC;
+ mkglobal = flags & ASS_MKGLOBAL;
+
+ 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, 0);
+ if (v)
+ assign_compound_array_list (v, list, flags);
+ }
+ /* In a function but forcing assignment in global context */
+ else if (mkglobal && variable_context)
+ {
+ v = find_global_variable (name);
+ list = expand_compound_array_assignment (v, value, flags);
+ if (v == 0 && mkassoc)
+ v = make_new_assoc_variable (name);
+ else if (v && mkassoc && assoc_p (v) == 0)
+ v = convert_var_to_assoc (v);
+ else if (v == 0)
+ v = make_new_array_variable (name);
+ else if (v && mkassoc == 0 && array_p (v) == 0)
+ v = convert_var_to_array (v);
+ if (v)
+ 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) && (word->flags & W_ASSNGLOBAL) == 0)
+ aflags |= ASS_MKLOCAL;
+ if ((word->flags & W_ASSIGNARG) && (word->flags & W_ASSNGLOBAL))
+ aflags |= ASS_MKGLOBAL;
+ 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);
+
+ /* 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);
+}
+
+/* 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;
+{
+ WORD_DESC td;
+ WORD_LIST *list, *tlist;
+ 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])
+ {
+ /* This is expanded version of expand_string_internal as it's called by
+ expand_string_leave_quoted */
+ td.flags = W_NOPROCSUB; /* don't want process substitution */
+ td.word = savestring (string);
+ list = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL);
+ /* This takes care of the calls from expand_string_leave_quoted and
+ expand_string */
+ if (list)
+ {
+ tlist = word_list_split (list);
+ dispose_words (list);
+ list = tlist;
+ if (list)
+ dequote_list (list);
+ }
+ /* This comes from expand_string_if_necessary */
+ if (list)
+ {
+ ret = string_list (list);
+ dispose_words (list);
+ }
+ else
+ ret = (char *)NULL;
+ FREE (td.word);
+ }
+ else if (saw_quote && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0))
+ ret = string_quote_removal (string, quoted);
+ else
+ ret = savestring (string);
+
+ return ret;
+}
+
+#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 */
+ return (NULL);
+ }
+ 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))
+ {
+ 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--)
+ {
+ 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);
+
+ for (p = (mlen == -1) ? end : string + mlen; p >= string; p--)
+ {
+ c = *p; *p = '\0';
+ if (strmatch (pat, string, FNMATCH_EXTFLAG) == 0)
+ {
+ *p = c;
+ *sp = string;
+ *ep = p;
+ return 1;
+ }
+ *p = c;
+ /* If MLEN != -1, we have a fixed length pattern. */
+ if (mlen != -1)
+ break;
+ }
+
+ return (0);
+
+ case MATCH_END:
+ for (p = end - ((mlen == -1) ? len : mlen); p <= end; p++)
+ {
+ if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0)
+ {
+ *sp = p;
+ *ep = end;
+ return 1;
+ }
+ /* If MLEN != -1, we have a fixed length pattern. */
+ if (mlen != -1)
+ break;
+ }
+
+ 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++)
+ {
+ n2 = simple ? (*wpat == wstring[n]) : match_pattern_wchar (wpat, wstring + n);
+ if (n2)
+ {
+ n1 = (mlen == -1) ? wstrlen : n + mlen;
+ if (n1 > wstrlen)
+ break;
+
+ for ( ; n1 >= n; n1--)
+ {
+ 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 MLEN != -1, we have a fixed length pattern. */
+ if (mlen != -1)
+ break;
+ }
+ }
+ }
+
+ return (0);
+
+ case MATCH_BEG:
+ if (match_pattern_wchar (wpat, wstring) == 0)
+ return (0);
+
+ for (n = (mlen == -1) ? wstrlen : mlen; n >= 0; n--)
+ {
+ 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 MLEN != -1, we have a fixed length pattern. */
+ if (mlen != -1)
+ break;
+ }
+
+ return (0);
+
+ case MATCH_END:
+ for (n = wstrlen - ((mlen == -1) ? wstrlen : mlen); n <= wstrlen; n++)
+ {
+ if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0)
+ {
+ *sp = indices[n];
+ *ep = indices[wstrlen];
+ return 1;
+ }
+ /* If MLEN != -1, we have a fixed length pattern. */
+ if (mlen != -1)
+ break;
+ }
+
+ 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 (mbsmbchar (string) == 0 && mbsmbchar (pat) == 0)
+ 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);
+
+ /* XXX */
+ if (v && invisible_p (var))
+ return ((char *)NULL);
+
+ 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 */
+
+ /* subshells shouldn't have this flag, which controls using the temporary
+ environment for variable lookups. */
+ expanding_redir = 0;
+
+ 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 */
+
+ last_command_exit_value = result;
+ result = run_exit_trap ();
+ 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:
+
+ last_made_pid = old_pid;
+
+ 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)
+ {
+ builtin_ignoring_errexit = 0;
+ change_flag ('e', FLAG_OFF);
+ set_shellopts ();
+ }
+
+ 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_nosigs (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_nosigs (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 || invisible_p (var) || (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 || invisible_p (var))
+ 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);
+ FREE (akey);
+ return (-1);
+ }
+ t = assoc_reference (assoc_cell (var), akey);
+ free (akey);
+ }
+ else
+ {
+ ind = array_expand_index (var, t, len);
+ /* negative subscripts to indexed arrays count back from end */
+ if (var && array_p (var) && ind < 0)
+ ind = array_max_index (array_cell (var)) + 1 + ind;
+ 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))
+ {
+expand_arrayref:
+ /* XXX - does this leak if name[@] or name[*]? */
+ if (pflags & PF_ASSIGNRHS)
+ {
+ temp = array_variable_name (name, &tt, (int *)0);
+ if (ALL_ELEMENT_SUB (tt[0]) && tt[1] == ']')
+ temp = array_value (name, quoted|Q_DOUBLE_QUOTES, 0, &atype, &ind);
+ else
+ temp = array_value (name, quoted, 0, &atype, &ind);
+ }
+ else
+ 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 if (var = find_variable_last_nameref (name))
+ {
+ temp = nameref_cell (var);
+#if defined (ARRAY_VARS)
+ /* Handle expanding nameref whose value is x[n] */
+ if (temp && *temp && valid_array_reference (temp))
+ {
+ name = temp;
+ goto expand_arrayref;
+ }
+ else
+#endif
+ /* y=2 ; typeset -n x=y; echo ${x} is not the same as echo ${2} in ksh */
+ if (temp && *temp && legal_identifier (temp) == 0)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ report_error (_("%s: invalid variable name for name reference"), temp);
+ temp = &expand_param_error;
+ }
+ else
+ temp = (char *)NULL;
+ }
+ else
+ temp = (char *)NULL;
+
+ if (ret == 0)
+ {
+ ret = alloc_word_desc ();
+ ret->word = temp;
+ ret->flags |= rflags;
+ }
+ return ret;
+}
+
+static char *
+parameter_brace_find_indir (name, var_is_special, quoted, find_nameref)
+ char *name;
+ int var_is_special, quoted, find_nameref;
+{
+ char *temp, *t;
+ WORD_DESC *w;
+ SHELL_VAR *v;
+
+ if (find_nameref && var_is_special == 0 && (v = find_variable_last_nameref (name)) &&
+ nameref_p (v) && (t = nameref_cell (v)) && *t)
+ return (savestring (t));
+
+ /* If var_is_special == 0, and name is not an array reference, this does
+ more expansion than necessary. It should really look up the variable's
+ value and not try to expand it. */
+ 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);
+
+ return t;
+}
+
+/* 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;
+ SHELL_VAR *v;
+
+ /* See if it's a nameref first, behave in ksh93-compatible fashion.
+ There is at least one incompatibility: given ${!foo[0]} where foo=bar,
+ bash performs an indirect lookup on foo[0] and expands the result;
+ ksh93 expands bar[0]. We could do that here -- there are enough usable
+ primitives to do that -- but do not at this point. */
+ if (var_is_special == 0 && (v = find_variable_last_nameref (name)))
+ {
+ if (nameref_p (v) && (t = nameref_cell (v)) && *t)
+ {
+ w = alloc_word_desc ();
+ w->word = savestring (t);
+ w->flags = 0;
+ return w;
+ }
+ }
+
+ t = parameter_brace_find_indir (name, var_is_special, quoted, 0);
+
+ 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;
+ /* If we have a quoted null result (QUOTED_NULL(temp)) and the word is
+ a quoted null (l->next == 0 && QUOTED_NULL(l->word->word)), the
+ flags indicate it (l->word->flags & W_HASQUOTEDNULL), and the
+ expansion is quoted (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
+ (which is more paranoia than anything else), we need to return the
+ quoted null string and set the flags to indicate it. */
+ if (l->next == 0 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && QUOTED_NULL (temp) && QUOTED_NULL (l->word->word) && (l->word->flags & W_HASQUOTEDNULL))
+ {
+ w->flags |= W_HASQUOTEDNULL;
+ }
+ 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);
+#if 0
+ if (STREQ (name, "IFS") == 0)
+#endif
+ stupidly_hack_special_variables (name);
+
+ /* 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;
+
+ last_command_exit_value = EXECUTION_FAILURE; /* ensure it's non-zero */
+ 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 1
+ if ((vtype == VT_ARRAYVAR || vtype == VT_POSPARMS) && *e2p < 0)
+#else
+ /* bash-4.3: allow positional parameter length < 0 to count backwards
+ from end of positional parameters */
+ if (vtype == VT_ARRAYVAR && *e2p < 0)
+#endif
+ {
+ 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, want_indir;
+ char *temp, *vname;
+ WORD_DESC *wd;
+#if defined (ARRAY_VARS)
+ SHELL_VAR *v;
+#endif
+ arrayind_t lind;
+
+ want_indir = *varname == '!' &&
+ (legal_variable_starter ((unsigned char)varname[1]) || DIGIT (varname[1])
+ || VALID_INDIR_PARAM (varname[1]));
+ if (want_indir)
+ vname = parameter_brace_find_indir (varname+1, SPECIAL_VAR (varname, 1), quoted, 1);
+ else
+ vname = varname;
+
+ /* This sets vtype to VT_VARIABLE or VT_POSPARMS */
+ vtype = (vname[0] == '@' || vname[0] == '*') && vname[1] == '\0';
+ if (vtype == VT_POSPARMS && vname[0] == '*')
+ vtype |= VT_STARSUB;
+ *varp = (SHELL_VAR *)NULL;
+
+#if defined (ARRAY_VARS)
+ if (valid_array_reference (vname))
+ {
+ v = array_variable_part (vname, &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 && invisible_p (v))
+ {
+ vtype = VT_ARRAYMEMBER;
+ *varp = (SHELL_VAR *)NULL;
+ *valp = (char *)NULL;
+ }
+ 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 (vname, 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 (vname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind);
+ }
+ }
+ else if ((v = find_variable (vname)) && (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;
+ }
+
+ if (want_indir)
+ free (vname);
+
+ 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)
+ {
+ if (vtype == VT_VARIABLE)
+ FREE (val);
+ 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;
+
+ ret = string_list_pos_params (pchar, save, qflags);
+
+ 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;
+ /* PATSUB is never NULL when this is called. */
+ if (*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. */
+ delim = skip_to_delim (lpatsub, ((*patsub == '/') ? 1 : 0), "/", 0);
+ if (lpatsub[delim] == '/')
+ {
+ lpatsub[delim] = 0;
+ rep = lpatsub + delim + 1;
+ }
+ else
+ rep = (char *)NULL;
+
+ 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)
+ {
+ /* We want to perform quote removal on the expanded replacement even if
+ the entire expansion is double-quoted because the parser and string
+ extraction functions treated quotes in the replacement string as
+ special. THIS IS NOT BACKWARDS COMPATIBLE WITH BASH-4.2. */
+ if (shell_compatibility_level > 42)
+ rep = expand_string_if_necessary (rep, quoted & ~(Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT), expand_string_unsplit);
+ /* This is the bash-4.2 code. */
+ else 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++;
+ temp1 = string_extract (string, &t_index, "#%:-=?+/}", 0);
+ name = (char *)xrealloc (name, 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 */) /* XXX */
+ 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;
+
+ tflag |= W_DOLLARAT;
+ }
+
+ /* 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;
+
+ tflag |= W_DOLLARAT;
+ }
+ free (x);
+ dispose_words (xlist);
+ free (temp1);
+ *indexp = sindex;
+
+ free (name);
+
+ ret = alloc_word_desc ();
+ ret->word = temp;
+ ret->flags = tflag; /* XXX */
+ 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;
+
+ tflag |= W_DOLLARAT;
+ }
+
+ free (temp1);
+ *indexp = sindex;
+
+ ret = alloc_word_desc ();
+ ret->word = temp;
+ ret->flags = tflag; /* XXX */
+ 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|PF_ASSIGNRHS)), &ind);
+
+ if (tdesc)
+ {
+ temp = tdesc->word;
+ tflag = tdesc->flags;
+ dispose_word_desc (tdesc);
+ }
+ else
+ temp = (char *)0;
+
+ if (temp == &expand_param_error || temp == &expand_param_fatal)
+ {
+ FREE (name);
+ FREE (value);
+ return (temp == &expand_param_error ? &expand_wdesc_error : &expand_wdesc_fatal);
+ }
+
+#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);
+ /* XXX - this may not need to be restricted to special variables */
+ if (check_nullness)
+ var_is_null |= var_is_set && var_is_special && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && QUOTED_NULL (temp);
+
+ /* 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;
+ 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:
+ last_command_exit_value = EXECUTION_FAILURE;
+ 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 ${...} be removed. */
+ if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
+ quoted |= Q_DOLBRACE;
+ ret = parameter_brace_expand_rhs (name, value, c,
+ quoted,
+ quoted_dollar_atp,
+ contains_dollar_at);
+ /* XXX - fix up later, esp. noting presence of
+ W_HASQUOTEDNULL in ret->flags */
+ free (value);
+ }
+ else
+ temp = (char *)NULL;
+ }
+ else
+ {
+ FREE (value);
+ }
+ /* Otherwise do nothing; just use the value in TEMP. */
+ }
+ else /* VAR not set or VAR is NULL. */
+ {
+ FREE (temp);
+ temp = (char *)NULL;
+ if (c == '=' && var_is_special)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ report_error (_("$%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 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);
+ if (quoted == 0 && (ifs_is_set == 0 || ifs_is_null))
+ tflag |= W_SPLITSPACE;
+ }
+
+ 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. */
+ temp = string_list_dollar_at (list, (pflags & PF_ASSIGNRHS) ? (quoted|Q_DOUBLE_QUOTES) : quoted);
+
+ tflag |= W_DOLLARAT;
+ 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;
+ }
+ else if (var = find_variable_last_nameref (temp1))
+ {
+ temp = nameref_cell (var);
+#if defined (ARRAY_VARS)
+ if (temp && *temp && valid_array_reference (temp))
+ {
+ tdesc = parameter_brace_expand_word (temp, SPECIAL_VAR (temp, 0), quoted, pflags, (arrayind_t *)NULL);
+ if (tdesc == &expand_wdesc_error || tdesc == &expand_wdesc_fatal)
+ return (tdesc);
+ ret = tdesc;
+ goto return0;
+ }
+ else
+#endif
+ /* y=2 ; typeset -n x=y; echo $x is not the same as echo $2 in ksh */
+ if (temp && *temp && legal_identifier (temp) == 0)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ report_error (_("%s: invalid variable name for name reference"), temp);
+ return (&expand_wdesc_error); /* XXX */
+ }
+ else
+ temp = (char *)NULL;
+ }
+
+ 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, temp_has_dollar_at;
+ int split_on_spaces;
+ 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;
+ split_on_spaces = 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;
+
+ temp_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,
+ &temp_has_dollar_at, "ed_dollar_at,
+ &had_quoted_null, pflags);
+ has_dollar_at += temp_has_dollar_at;
+ split_on_spaces += (tword->flags & W_SPLITSPACE);
+
+ 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 ? tword->word : (char *)NULL;
+ dispose_word_desc (tword);
+
+ /* Kill quoted nulls; we will add them back at the end of
+ expand_word_internal if nothing else in the string */
+ if (had_quoted_null && temp && QUOTED_NULL (temp))
+ {
+ FREE (temp);
+ temp = (char *)NULL;
+ }
+
+ 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;
+ }
+ last_command_exit_value = EXECUTION_FAILURE;
+ 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);
+ }
+ /* This is the fix for " $@\ " */
+ else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && ((sh_syntaxtab[c] & tflag) == 0) & isexp == 0 && isifs (c))
+ {
+ RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size,
+ DEFAULT_ARRAY_SIZE);
+ istring[istring_index++] = CTLESC;
+ istring[istring_index++] = '\\';
+ istring[istring_index] = '\0';
+
+ 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 ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
+ 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;
+
+ temp_has_dollar_at = 0; /* XXX */
+ /* Need to get W_HASQUOTEDNULL flag through this function. */
+ list = expand_word_internal (tword, Q_DOUBLE_QUOTES, 0, &temp_has_dollar_at, (int *)NULL);
+ has_dollar_at += temp_has_dollar_at;
+
+ 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; /* XXX */
+
+ 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)
+ {
+ /* 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 exception 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 ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)))
+ 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_NOBRACE)
+ tword->flags |= W_NOBRACE; /* 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 && QUOTED_NULL (istring))
+ 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
+ SPLIT_ON_SPACES is set, we expanded $* (unquoted) with IFS either
+ unset or null, and we want to make sure that we split on spaces
+ regardless of what else has happened to IFS since the expansion. */
+ if (split_on_spaces)
+ list = list_string (istring, " ", 1); /* XXX quoted == 1? */
+ else 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_NOBRACE)
+ tword->flags |= W_NOBRACE;
+ if (word->flags & W_NOEXPAND)
+ tword->flags |= W_NOEXPAND;
+ if (had_quoted_null && QUOTED_NULL (istring))
+ 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";
+
+ ifs_is_set = ifs_var != 0;
+ ifs_is_null = ifs_is_set && (*ifs_value == 0);
+
+ /* 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]);
+ 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)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ 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_NOBRACE)
+ {
+/*itrace("brace_expand_word_list: %s: W_NOBRACE", tlist->word->word);*/
+ PREPEND_LIST (tlist, output_list);
+ continue;
+ }
+
+ 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 = alloc_word_desc ();
+ w->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;
+ else
+ w = make_word_flags (w, temp_string);
+
+ output_list = make_word_list (w, output_list);
+ }
+ 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;
+ char opts[8], opti;
+
+ opti = 0;
+ if (tlist->word->flags & (W_ASSIGNASSOC|W_ASSNGLOBAL|W_ASSIGNARRAY))
+ opts[opti++] = '-';
+
+ if ((tlist->word->flags & (W_ASSIGNASSOC|W_ASSNGLOBAL)) == (W_ASSIGNASSOC|W_ASSNGLOBAL))
+ {
+ opts[opti++] = 'g';
+ opts[opti++] = 'A';
+ }
+ else if (tlist->word->flags & W_ASSIGNASSOC)
+ opts[opti++] = 'A';
+ else if ((tlist->word->flags & (W_ASSIGNARRAY|W_ASSNGLOBAL)) == (W_ASSIGNARRAY|W_ASSNGLOBAL))
+ {
+ opts[opti++] = 'g';
+ opts[opti++] = 'a';
+ }
+ else if (tlist->word->flags & W_ASSIGNARRAY)
+ opts[opti++] = 'a';
+ else if (tlist->word->flags & W_ASSNGLOBAL)
+ opts[opti++] = 'g';
+
+ /* If we have special handling note the integer attribute */
+ if (opti > 0 && (tlist->word->flags & W_ASSIGNINT))
+ opts[opti++] = 'i';
+
+ opts[opti] = '\0';
+ if (opti > 0)
+ make_internal_declare (tlist->word->word, opts);
+
+ 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|W_ASSIGNARRAY);
+ }
+#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; words
+ with W_NOBRACE set do not undergo brace expansion (see
+ brace_expand_word_list above). */
+static WORD_LIST *
+expand_word_list_internal (list, eflags)
+ WORD_LIST *list;
+ int eflags;
+{
+ WORD_LIST *new_list, *temp_list;
+ int tint;
+
+ tempenv_assign_error = 0;
+ 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;
+ }
+
+ return (new_list);
+}
-BUILD_DIR=/usr/local/build/chet/bash/bash-current
+BUILD_DIR=/usr/local/build/bash/bash-current
THIS_SH=$BUILD_DIR/bash
PATH=$PATH:$BUILD_DIR
--- /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 "$@"
declare -a x='([0]="0" [1]="1" [2]="2" [3]="3" [4]="4" [5]="5")'
declare -a x='([0]="0" [1]="1" [2]="2" [3]="3" [4]="4four" [5]="5")'
strlen(4four) = 5
+1 2 0 3
+1 2 0 3
+1 2 0 3
${THIS_SH} ./array13.sub
${THIS_SH} ./array14.sub
+
+${THIS_SH} ./array15.sub
--- /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
+
+${THIS_SH} ./array11.sub
+
+${THIS_SH} ./array12.sub
+
+${THIS_SH} ./array13.sub
+
+${THIS_SH} ./array14.sub
--- /dev/null
+# fixes for make_internal_declare not handling integer attribute for arrays
+declare -ai -g foo=(1 2 xx 3)
+echo "${foo[@]}"
+
+unset foo
+declare -ai -g foo='(1 2 xx 3)'
+echo "${foo[@]}"
+
+unset foo
+declare -ia -g foo=(1 2 xx 3)
+echo "${foo[@]}"
+
+unset foo
+declare -ia -g foo='(1 2 xx 3)'
+echo "${foo[@]}"
+
+unset foo
+func()
+{
+ declare -ai -g foo=(1 2 xx 3)
+}
+
+func
+echo "${foo[@]}"
--- /dev/null
+# fixes for make_internal_declare not handling integer attribute for arrays
+declare -ai -g foo=(1 2 xx 3)
+echo "${foo[@]}"
+
+declare -ai -g foo='(1 2 xx 3)'
+echo "${foo[@]}"
+
+unset foo
+declare -ia -g foo=(1 2 xx 3)
+echo "${foo[@]}"
+
+declare -ia -g foo='(1 2 xx 3)'
+echo "${foo[@]}"
+
+unset foo
+func()
+{
+ declare -ai -g foo=(1 2 xx 3)
+}
+
+func
+echo "${foo[@]}"
wait $!
exit
in trap EXIT
-works
-bar
-bar
-foo
-trap -- '' SIGINT
-trap -- '' SIGUSR2
-foo
-bar
-foo
-bar
caught a child death
caught a child death
caught a child death
${THIS_SH} ./trap4.sub
-${THIS_SH} ./trap5.sub
+# This doesn't work right on all Unix versions
+#${THIS_SH} ./trap5.sub
#
# show that setting a trap on SIGCHLD is not disastrous.
--- /dev/null
+# test the trap code
+
+trap 'echo exiting' 0
+trap 'echo aborting' 1 2 3 6 15
+
+# make sure a user-specified subshell runs the exit trap, but does not
+# inherit the exit trap from a parent shell
+( trap 'echo subshell exit' 0; exit 0 )
+( exit 0 )
+
+trap
+
+func()
+{
+ trap 'echo ${FUNCNAME:-$0}[$LINENO] funcdebug' DEBUG
+ echo funcdebug line
+}
+
+trap 'echo [$LINENO] debug' DEBUG
+echo debug line
+
+trap
+
+func
+
+trap
+
+trap 'echo ${FUNCNAME:-$0}[$LINENO] debug' DEBUG
+func2()
+{
+ echo func2debug line
+}
+declare -ft func2
+func2
+
+unset -f func2
+
+trap '' DEBUG
+
+trap
+
+trap - debug
+
+trap
+
+trap - HUP
+trap hup
+trap '' INT
+trap '' int
+
+trap
+
+# exit 0 in exit trap should set exit status
+(
+set -e
+trap 'exit 0' EXIT
+false
+echo bad
+)
+echo $?
+
+# hmmm...should this set the handling to SIG_IGN for children, too?
+trap '' USR2
+./trap1.sub
+
+# test ERR trap
+./trap2.sub
+
+${THIS_SH} ./trap3.sub
+
+${THIS_SH} ./trap4.sub
+
+${THIS_SH} ./trap5.sub
+
+#
+# show that setting a trap on SIGCHLD is not disastrous.
+#
+set -o monitor
+
+trap 'echo caught a child death' SIGCHLD
+
+sleep 7 & sleep 6 & sleep 5 &
+
+# this will only catch the first, since there's a trap on SIGCHLD
+wait
+
+trap -p SIGCHLD
+
+# Now reset some of the signals the shell handles specially back to
+# their default values (with or without the SIG prefix)
+trap - SIGINT QUIT TERM
+
+trap
+
+trap - SIGCHLD
+wait
# make sure process substitution runs the exit trap
-[[ -n $(< <(trap "tee /dev/fd/3" EXIT)) ]] 3>&1 <<<works || echo "fail :("
+[[ -n $(< <(trap "cat /dev/fd/0" EXIT)) ]] <<<works && echo works || echo "fail :("
read foo < <(trap "echo bar" EXIT)
echo $foo
projects / thirdparty / bash.git / commitdiff
