find_variable
- test_unop: add back missing 'R' case. Fixes bug reported by
NBaH <nbah@sfr.fr>
+
+ 3/7
+ ---
+pcomplete.c
+ - pcomp_curtxt: new variable, holds the original text to be completed
+ as passed to the programmable completion code
+ - pcomp_filename_completion_function: if we are running compgen
+ (presumably in a shell function completion) and performing readline
+ completion, check the word being completed. If it's not empty, but
+ the original word passed to the programmable completion code is an
+ empty string (""), call a dequoting function if one is available.
+ This compensates for an assumption in bash-completion. Reported by
+ Albert Shih <Albert.Shih@obspm.fr>
+
+lib/readline/readline.c
+ - _rl_dispatch_subseq: when deciding whether or not to set vi mode's
+ idea of the last command, use whether or not the dispatching keymap
+ is vi_movement_keymap instead of the key sequence length. The `c',
+ `d', and `y' commands all take motion commands as `arguments' and
+ will produce key sequences longer than 1 character. The arrow keys
+ will end up dispatching out of a different keymap, so the test will
+ prevent arrow keys from setting the last command (the problem in
+ bash-4.2). Bug report from Daan van Rossum <daan@flash.uchicago.edu>
+
+lib/readline/vi_mode.c
+ - _rl_vi_motion_command: convenience function to test whether a key is
+ a vi-mode motion command
+
+lib/readline/rlprivate.h
+ - _rl_vi_motion_command: extern declaration
+
+parse.y
+ - parse_matched_pair: we should not skip processing single quotes in
+ posix mode if dolbrace_state == DOLBRACE_QUOTE2 (pattern
+ substitution). Fixes bug reported by David Sines
+ <dave.gma@googlemail.com>
--- /dev/null
+ 2/14/2011
+ ---------
+[bash-4.2 released]
+
+ 2/15
+ ----
+lib/glob/gmisc.c
+ - fix wmatchlen and umatchlen to avoid going past the end of the
+ string on an incomplete bracket expression that ends with a
+ NUL. Partial fix for bug reported by Clark Wang <dearvoid@gmail.com>
+
+ 2/16
+ ----
+subst.h
+ - new string extract flag value: SX_WORD. Used when calling
+ extract_dollar_brace_string to skip over the word in
+ ${param op word} from parameter_brace_expand
+
+subst.c
+ - change parameter_brace_expand to add SX_WORD to flags passed to
+ extract_dollar_brace_string
+ - change parameter_brace_expand to use SX_POSIXEXP for all non-posix
+ word expansion operators that treat single quotes as special, not
+ just % and #
+ - change extract_dollar_brace_string to initialize dolbrace_state to
+ DOLBRACE_WORD if SX_WORD flag supplied and we shouldn't use
+ DOLBRACE_QUOTE. Fixes bug reported by Juergen Daubert <jue@jue.li>
+
+doc/{bash.1,bashref.texi}
+ - document the exact expansions here strings undergo
+
+ 2/17
+ ----
+lib/readline/vi_mode.c
+ - make sure that `dd', `cc', and `yy' call vidomove_dispatch from
+ rl_domove_read_callback. Fixes bug reported by Clark Wang
+ <dearvoid@gmail.com>
+
+lib/readline/callback.c
+ - make sure _rl_internal_char_cleanup is called after the
+ vi-motion callbacks (rl_vi_domove_callback) in rl_callback_read_char.
+ Companion to above fix
+
+doc/{bash.1,bashref.texi}
+ - make sure that the text describing the rhs of the == and =~
+ operators to [[ states that only the quoted portion of the pattern
+ is matched as a string
+
+ 2/18
+ ----
+lib/glob/gmisc.c
+ - better fix for umatchlen/wmatchlen: keep track of the number of
+ characters in a bracket expression as the value to increase
+ matchlen by if the bracket expression is not well-formed. Fixes
+ bug reported by Clark Wang <dearvoid@gmail.com>
+
+subst.c
+ - change expand_string_for_rhs so that it sets the W_NOSPLIT2 flag
+ in the word flags. We will not perform word splitting or quote
+ removal on the result, so we do not want to add quoted nulls if
+ we see "" or ''. Fixes bug reported by Mike Frysinger
+ <vapier@gentoo.org>
+
+ 2/19
+ ----
+variables.c
+ - new function, int chkexport(name), checks whether variable NAME is
+ exported and remakes the export environment if necessary. Returns
+ 1 if NAME is exported and 0 if not
+ - call chkexport(name) to get tzset to look at the right variable in
+ the environment when modifying TZ in sv_tz. Don't call tzset if
+ chkexport doesn't indicate that the variable is exported
+
+variables.h
+ - new extern declaration for chkexport
+
+
+{parse.y,builtins/printf.def}
+ - call sv_tz before calling localtime() when formatting time strings
+ in prompt strings or using printf. Fixes bug reported by
+ Dennis Williamson <dennistwilliamson@gmail.com>
+
+execute_cmd.c
+ - modify fix of 2/9 to add casts when those variables are passed to
+ functions; some compilers throw errors instead of warnings. Report
+ and fix from Joachim Schmitz <jojo@schmitz-digital.de>
+
+support/shobj-conf
+ - add a stanza for nsk on the Tandem from Joachim Schmitz
+ <jojo@schmitz-digital.de>
+
+{shell,lib/readline/shell}.c
+ - Tandem systems should use getpwnam (getlogin()); for some reason
+ they don't do well with using getuid(). Fix from Joachim Schmitz
+ <jojo@schmitz-digital.de>
+
+ 3/1
+ ---
+variables.c
+ - make sure that the return value from find_variable is non-null
+ before trying to use it in chkexport. Fixes bug reported by
+ Evangelos Foutras <foutrelis@gmail.com>
+
+ 3/3
+ ---
+parse.y
+ - when adding $$ to the current token buffer in read_token_word(),
+ don't xmalloc a buffer for two characters and then strcpy it, just
+ copy the characters directly into the token buffer. Fix from
+ Michael Whitten <mfwitten@gmail.com>
+
+execute_cmd.c
+ - fix expand_word_unsplit to add the W_NOSPLIT2 flag to the word to
+ be expanded, so "" doesn't add CTLNUL. Similar to fix of 2/18 to
+ expand_string_for_rhs. Fixes bug reported by Nathanael D. Noblet
+ <nathanael@gnat.ca> and Matthias Klose <doko@debian.org>
+
+parse.y
+ - fix extended_glob case of read_token_word to allocate an extra
+ space in the buffer for the next character read after the extended
+ glob specification if it's a CTLESC or CTLNUL. Report and fix from
+ Michael Witten <mfwitten@gmail.com>
+ - fix shell expansions case of read_token_word to allocate an extra
+ space in the buffer for the next character read after the shell
+ expansion if it's a CTLESC or CTLNUL. Report and fix from
+ Michael Witten <mfwitten@gmail.com>
+ - TENTATIVE: fix read_token_word to reduce the amount of buffer space
+ required to hold the translated and double-quoted value of $"..."
+ strings. Report and fix from Michael Witten <mfwitten@gmail.com>
+ - change code around got_character and got_escaped_character labels to
+ make sure that we call RESIZE_MALLOCED_BUFFER before adding the
+ CTLESC before a CTLESC or CTLNUL, and before adding the character if
+ we're not adding a CTLESC. Report and fix from
+ Michael Witten <mfwitten@gmail.com>
+
+subst.c
+ - new param flags value, PF_ASSIGNRHS, mirrors W_ASSIGNRHS, noting that
+ parameter expansion is on rhs of assignment statement. That inhibits
+ word splitting
+ - change param_expand to call string_list_dollar_at with quoted == 1
+ if PF_ASSIGNRHS is set, so it will quote IFS characters in the
+ positional parameter before separating them with the first char of
+ $IFS. This keeps the rhs from being split inappropriately. Fixes
+ bug reported by Andres Perera <andres.p@zoho.com>
+
+ 3/4
+ ---
+lib/readline/bind.c
+ - add a missing free of `names' in rl_function_dumper. Bug report
+ and fix from Michael Snyder <msnyder@vmware.com>
+
+ 3/5
+ ---
+lib/readline/rltty.c
+ - change rl_deprep_terminal so it uses fileno (stdin) for the tty fd
+ if rl_instream is not set, like rl_prep_terminal
+
+ 3/6
+ ---
+lib/readline/display.c
+ - fix rl_message to use a dynamically-allocated buffer instead of a
+ fixed-size buffer of 128 chars for the `local message prompt'. Bug
+ report and fix from Micah Cowan <micah@cowan.name>
+
+ 3/7
+ ---
+jobs.c
+ - add sentinel to wait_sigint_handler so it only sets wait_sigint_received
+ if waiting_for_child is non-zero; otherwise, it restores the old
+ SIGINT handler and sends itself the SIGINT
+ - set waiting_for_child around the calls to waitchld that use it to
+ synchronously wait for a process
+ - change logic that decides whether or not the child process blocked
+ or handled SIGINT based on whether or not waitpid returns -1/EINTR
+ and the shell receives a SIGINT and the child does not exit. If
+ the child later exits due to SIGINT, cancel the assumoption that it
+ was handled
+ - instead of testing whether or not the child exited due to SIGINT
+ when deciding whether the shell should act on a SIGINT it received
+ while waiting, test whether or not we think the child caught
+ SIGINT. If it did, we let it go (unless the shell has it trapped);
+ if it did not catch it, the shell acts on the SIGINT. Fix from
+ Linus Torvalds <torvalds@linux-foundation.org>, bug report originally
+ from Oleg Nesterov <oleg@redhat.com>
+
+ 3/8
+ ---
+shell.c
+ - initialize no_line_editing to 1 if READLINE is not defined -- we
+ can't have line editing without readline
+
+ 3/12
+ ----
+lib/readline/signals.c
+ - add SIGHUP to the set of signals readline handles
+
+lib/readline/doc/rltech.texi
+ - document that SIGHUP is now part of the set of signals readline
+ handles
+
+lib/readline/input.c
+ - if _rl_caught_signal indicates that read() was interrupted by a
+ SIGHUP or SIGTERM, return READERR or EOF as appropriate
+ - call rl_event_hook, if it's set, if call to read in rl_getc
+ returns -1/EINTR. If rl_event_hook doesn't do anything, this
+ continues the loop as before. This handles the other fatal
+ signals
+
+execute_cmd.c
+ - add a couple of QUIT; calls to execute_disk_command and
+ execute_simple_command to improve responsiveness to interrupts
+ and fatal signals
+
+input.c
+ - rearrange getc_with_restart so that the return values from read()
+ are handled right
+
+parse.y
+ - don't need to set terminate_immediately in yy_stream_get, since
+ getc_with_restart checks for terminating signals itself
+ - since readline returns READERR on SIGHUP or SIGTERM, don't need
+ to set terminate_immediately. Still doesn't handle other
+ signals well -- will have to check that some more
+
+bashline.c
+ - new function, bash_event_hook, for rl_event_hook. Just checks for
+ terminating signals and acts on them using CHECK_TERMSIG.
+ - set rl_event_hook to bash_event_hook
+
+builtins/read.def
+ - take out setting terminate_immediately; add calls to CHECK_TERMSIG
+ after read calls
+
+doc/{bash.1,bashref.texi}
+ - move the text describing the effect of negative subscripts used to
+ reference indexed array elements to the paragraphs describing
+ ${parameter[subscript]}, since that's where they are implemented.
+ Pointed out by Christopher F. A. Johnson <cfajohnson@gmail.com>
+
+arrayfunc.[ch],subst.c
+ - array_expand_index now takes a new first argument: a SHELL_VAR *
+ of the array variable being subscripted. Can be used later to fully
+ implement negative subscripts
+
+ 3/14
+ ----
+lib/glob/glob.c
+ - fix mbskipname to not turn the directory entry name into a wide char
+ string if the conversion of the pattern to a wide char string fails
+ - fix mbskipname to call skipname if either the pattern or the filename
+ can't be converted into a wide-char string
+
+lib/glob/xmbsrtowcs.c
+ - fix xdupmbstowcs2 to handle return value of 0 from mbsnrtowcs and
+ short-circuit with failure in that case. Fixes bug reported by
+ Roman Rakus <rrakus@redhat.com>
+
+ 3/15
+ ----
+bashline.c
+ - new variable, bash_filename_quote_characters to store the value
+ assigned to rl_filename_quote_characters so it can be restored
+ if changed.
+ - change bashline_reset and attempt_shell_completion to restore
+ rl_filename_quote_characters if not set to default
+
+ 3/22
+ ----
+lib/glob/glob.c
+ - wdequote_pathname falls back to udequote_pathname if xdupmbstowcs
+ fails to convert the pathname to a wide-character string
+
+lib/glob/xmbsrtowcs.c
+ - xdupmbstowcs2: change to fix problem with leading '\\' (results in
+ nms == 0, which causes it to short-circuit with failure right
+ away). Fixes bug pointed out by Werner Fink <werner@suse.de>
+ - xdupmbstowcs2: compensate for mbsnrtowcs returning 0 by taking the
+ next single-byte character and going on
+ - xdupmbstowcs2: change memory allocation to increase by WSBUF_INC
+ bytes; try to avoid calls to realloc (even if they don't actually
+ result in more memory being allocated)
+
+ 3/24
+ ----
+doc/{bash.1,bashref.texi}
+ - slightly modify BASH_SUBSHELL description based on complaint from
+ Sam Liddicott <sam@liddicott.com>
+
+ 3/25
+ ----
+trap.c
+ - change free_trap_strings to not call free_trap_string for signals
+ that are being ignored, like reset_or_restore_signal_handlers.
+ Fixes bug reported by Satoshi Takahashi <blue3waters@gmail.com>
+
+ 3/26
+ ----
+lib/readline/rltypedefs.h
+ - remove old Function/VFunction/CPFunction/CPPFunction typedefs as
+ suggested by Tom Tromey <tromey@redhat.com>
+
+lib/readline/rlstdc.h
+ - move defines for USE_VARARGS/PREFER_STDARG/PREFER_VARARGS from
+ config.h.in to here because declaration of rl_message in
+ readline.h uses the defines. This makes it hard for another packages
+ to use after the header files are installed, since config.h is not
+ one of the installed files. Suggested by Tom Tromey
+ <tromey@redhat.com>
+
+ 3/27
+ ----
+print_cmd.c
+ - change indirection_string from a static buffer to a dynamic one
+ managed by indirection_level_string(), so we don't end up truncating
+ PS4. Suggested by Dennis Williamson <dennistwilliamson@gmail.com>
+
+lib/readline/shell.c
+ - change sh_set_lines_and_columns to use static buffers instead of
+ allocating the buffers to pass to setenv/putenv
+
+lib/readline/terminal.c
+ - change _rl_get_screen_size to not call sh_set_lines_and_columns if
+ ignore_env == 0
+ - _rl_sigwinch_resize_terminal: new function to just retrieve terminal
+ size, ignoring environment
+
+lib/readline/rlprivate.h
+ - new external declaration for _rl_sigwinch_resize_terminal() (currently
+ unused)
+
+lib/readline/signals.c
+ - rl_sigwinch_handler: set _rl_caught_signal to SIGWINCH
+ - rl_sigwinch_handler: don't immediately call rl_resize_terminal; just
+ leave _rl_caught_signal set for RL_CHECK_SIGNALS to handle
+ - _rl_signal_handler: call rl_resize_terminal if sig == SIGWINCH.
+ Should fix hang when sending multiple repeated SIGWINCH reported by
+ Henning Bekel <h.bekel@googlemail.com>
+
+ 3/29
+ ----
+lib/sh/snprintf.c
+ - include math.h for any defines for isinf/isnan
+ - use code from gnulib documentation to implement isinf/isnan if they
+ are not defined
+
+configure.in
+ - don't check for isinf or isnan; c99 says they're macros anyway
+
+config.h.in
+ - remove defines for ISINF_IN_LIBC and ISNAN_IN_LIBC, no longer used
+ by snprintf.c
+
+ 4/2
+ ---
+braces.c
+ - brace_gobbler: fix to understand double-quoted command substitution,
+ since the shell understands unquoted comsubs. Fixes bug reported
+ by Michael Whitten <mfwitten@gmail.com>
+
+lib/readline/display.c
+ - include <pc.h> on MDOS
+ - get and set screen size using DJGPP-specific calls on MSDOS
+ - move cursor up clear screen using DJGPP-specific calls
+ - don't call tputs on DJGPP; there is no good terminfo support
+
+lib/readline/terminal.c
+ - include <pc.h> on MDOS
+ - get and set screen size using DJGPP-specific calls on MSDOS
+ - use DJGPP-specific initialization on MSDOS, zeroing all the
+ _rl_term_* variables
+ - don't call tputs on DJGPP; there is no good terminfo support
+ DJGPP support from Eli Zaretskii <eliz@gnu.org>
+
+ 4/6
+ ---
+
+config-top.h
+ - change DEFAULT_PATH_VALUE to something more useful and modern
+
+ 4/8
+ ---
+tests/printf2.sub
+ - make sure LC_ALL and LC_CTYPE are set so LANG assignment takes effect.
+ Reported by Cedric Arbogast <arbogast.cedric@gmail.com>
+
+ 4/11
+ ----
+include/chartypes.h
+ - fix a couple of dicey defines (though ones that don't cause any
+ compiler warnings) in IN_CTYPE_DOMAIN
+
+doc/{bashref.texi,bash.1}
+ - add note referring to duplicating file descriptors in sections
+ describing redirecting stdout and stderr and appending to stdout
+ and stderr. Suggested by Matthew Dinger <mdinger.bugzilla@gmail.com>
+
+pcomplete.c
+ - it_init_helptopics: new function to support completing on help topics,
+ not just builtins
+ - it_helptopics: new programmable completion list of help topics
+ - build list of helptopic completions in gen_action_completions on
+ demand
+
+pcomplete.h
+ - new extern declaration for it_helptopics
+
+builtins/complete.def
+ - the `helptopic' action now maps to CA_HELPTOPIC intead of CA_BUILTIN,
+ since there are more help topics than just builtins. Suggested by
+ Clark Wang <dearvoid@gmail.com>
+
+ 4/12
+ ----
+print_cmd.c
+ - fix print_arith_for_command to add a call to PRINT_DEFERRED_HEREDOCS
+ before ending the body of the command, so heredocs get attached to
+ the right command instead of to the loop. From gentoo bug 363371
+ http://bugs.gentoo.org/show_bug.cgi?id=363371
+
+execute_cmd.c
+ - change coproc_pidchk to unset the appropriate shell variables when
+ the (currently single) known coproc pid terminates
+ - cleanup and new functions to fully support multiple coprocesses when
+ and if I decide to go there
+
+ 4/13
+ ----
+print_cmd.c
+ - fix print_group_command to add a call to PRINT_DEFERRED_HEREDOCS
+ after call to make_command_string_internal before printing closing
+ `}'
+ - fix make_command_string_internal to add a call to
+ PRINT_DEFERRED_HEREDOCS after recursive call to
+ make_command_string_internal in case cm_subshell before printing
+ closing `)'
+
+ 4/14
+ ----
+print_cmd.c
+ - change overlapping strcpy in named_function_string to memmove
+
+sig.h
+ - UNBLOCK_SIGNAL: convenience define, same as UNBLOCK_CHILD, just
+ restores an old signal mask
+
+trap.c
+ - set_signal: instead of setting the signal handler to SIG_IGN while
+ installing the new trap handler, block the signal and unblock it
+ after the new handler is installed. Fixes bug reported by Roman
+ Rakus <rrakus@redhat.com>
+
+ 4/15
+ ----
+doc/{bash.1,bashref.texi}
+ - make it clear that enabling monitor mode means that all jobs run in
+ separate process groups
+
+ 4/18
+ ----
+builtins/fc.def
+ - update fix of 4/15/2010 to not take saved_command_line_count into
+ account when stepping down the history list to make sure that
+ last_hist indexes something that is valid. Fixes bug reported by
+ <piuma@piumalab.org>
+
+ 4/19
+ ----
+builtins/fc.def
+ - fc_gethnum: make sure the calculation to decide the last history
+ entry is exactly the same as fc_builtin. Fixes bug uncovered by
+ fix of 4/18 to stop seg fault
+
+ 4/22
+ ----
+lib/readline/terminal.c
+ - change _rl_enable_meta_key to set a flag indicating that it sent the
+ enable-meta sequence
+ - _rl_disable_meta_key: new function to turn off meta mode after we
+ turned it on with _rl_enable_meta_key
+
+lib/readline/rlprivate.h
+ - extern declaration for _rl_disable_meta_key
+
+configure.in
+ - if not cross-compiling, set CFLAGS_FOR_BUILD from any CFLAGS inherited
+ from the environment. Fixes HP/UX build problem reported by
+ "Daniel Richard G." <skunk@iSKUNK.ORG>
+
+ 4/26
+ ----
+config-top.h
+ - define MULTIPLE_COPROCS to 0 so the code is still disabled but easy
+ to enable via configure option or editing this file
+
+ 4/29
+ ----
+lib/sh/eaccess.c
+ - freebsd provides faccessat, with the same misfeature as their eaccess
+ and access implementations (X_OK returns true for uid==0 regardless
+ of the actual file permissions), so reorganize code to check the
+ file permissions as with eaccess. Report and fix from Johan Hattne
+ <johan.hattne@utsouthwestern.edu>
+
+ 5/2
+ ---
+doc/{bash.1,bashref.texi}
+ - add forward reference to `Pattern Matching' from `Pathname
+ Expansion', suggested by Greg Wooledge <wooledg@eeg.ccf.org>
+
+ 5/5
+ ---
+pcomplib.c
+ - the bash_completion project now distributes over 200 completions
+ for various programs, with no end in sight, so increase the value
+ of COMPLETE_HASH_BUCKETS from 32 to 128
+
+pathexp.c
+ - quote_string_for_globbing: make sure CTLESC quoting CTLESC is
+ translated into \<CTLESC> even if the flags include QGLOB_REGEXP.
+ We don't want to process the second CTLESC as a quote character.
+ Fixes bug reported by Shawn Bohrer <sbohrer@rgmadvisors.com>
+
+ 5/6
+ ---
+builtins/printf.def
+ - change PRETURN to not call fflush if ferror(stdout) is true
+ - if a call to one of the stdio functions or printstr leaves
+ ferror(stdout) true, and PRETURN is going to be called, let PRETURN
+ print the error message rather than doubling up the messages. Fixes
+ problem reported by Roman Rakus <rrakus@redhat.com>
+
+ 5/9
+ ---
+doc/{bash.1,bashref.texi}
+ - add note to the effect that lists inside compound command can be
+ terminated by newlines as well as semicolons. Suggested by
+ Roman Byshko <rbyshko@gmail.com>
+
+ 5/10
+ ----
+subst.c
+ - remove_quoted_nulls: fix problem that caused it to skip over the
+ character after a CTLNUL, which had the effect of skipping every
+ other of a series of CTLNULs. Fixes bug reported by
+ Marten Wikstrom <marten.wikstrom@keystream.se>
+
+ 5/11
+ ----
+subst.c
+ - extract_process_subst: add SX_COMMAND flag to call to
+ extract_delimited_string, since we're expanding the same sort of
+ command as command substitution. Fixes bug reported in Ubuntu
+ bug 779848
+
+ 5/12
+ ----
+configure.in
+ - set the prefer_shared and prefer_static variables appropriately
+ depending on the value of $opt_static_link
+
+aclocal.m4
+ - AC_LIB_LINKFLAGS_BODY: change to not prefer shared versions of the
+ libraries it's searching for if the prefer_shared variable is "no".
+ Fixes problem reported by Cedric Arbogast <arbogast.cedric@gmail.com>
+
+ 5/13
+ ----
+lib/readline/readline.c
+ - _rl_internal_teardown: add call to _rl_disable_meta_key to make the
+ meta key active only for the duration of the call to readline()
+ - _rl_internal_setup: move call to _rl_enable_meta_key here from
+ readline_initialize_everything so the meta key is active only for
+ the duration of the call to readline(). Suggestion from Miroslav
+ Lichvar <mlichvar@redhat.com>
+
+builtins/help.def
+ - help_builtin: change strncmp to strcmp so that `help read' no longer
+ matches `readonly'. Suggested by Clark Wang <dearvoid@gmail.com>
+
+config.h.in
+ - add define for GLIBC21, checked using jm_GLIBC21 as part of the tests
+ for libintl
+
+lib/malloc/malloc.c
+ - internal_free: don't use the cached value of memtop when deciding
+ whether or not to adjust the break and give memory back to the kernel
+ when using the GNU C library, since glibc uses sbrk for its own
+ internal purposes. From Debian bug 614815, reported by Samuel
+ Thibault <samuel.thibault@gnu.org>
+
+aclocal.m4
+ - BASH_STRUCT_WEXITSTATUS_OFFSET: change AC_RUN_IFELSE to AC_TRY_RUN
+ to avoid warning about not using AC_LANG_SOURCE
+
+ 5/14
+ ----
+bashline.[ch]
+ - two new functions, bashline_set_event_hook and bashline_reset_event_hook,
+ to set rl_event_hook to bash_event_hook and back to NULL, respectively
+ - don't set rl_event_hook unconditionally
+
+sig.c
+ - termsig_sighandler: if the shell is currently interactive and
+ readline is active, call bashline_set_event_hook to cause
+ termsig_handler to be called via bash_event_hook when the shell
+ returns from the signal handler
+
+ 5/15
+ ----
+lib/readline/display.c
+ - _rl_col_width: Mac OS X has a bug in wcwidth: it does not return 0
+ for UTF-8 combining characters. Added workaround dependent on
+ MACOSX. Fixes problem pointed out by Thomas De Contes
+ <d.l.tDecontes@free.fr>
+
+ 5/16
+ ----
+lib/readline/rlmbutil.h
+ - WCWIDTH: wrapper for wcwidth that returns 0 for Unicode combining
+ characters on systems where wcwidth is broken (e.g., Mac OS X).
+
+lib/readline/{complete,display,mbutil}.c
+ - use WCWIDTH instead of wcwidth
+
+ 5/17
+ ----
+lib/readline/display.c
+ - update_line: after computing ofd and nfd, see whether the next
+ character in ofd is a zero-width combining character. If it is,
+ back ofd and nfd up one, so the base characters no longer compare
+ as equivalent. Fixes problem reported by Keith Winstein
+ <keithw@mit.edu>
+
+lib/readline/nls.c
+ - _rl_utf8locale: new flag variable, set to non-zero if the current
+ locale is UTF-8
+ - utf8locale(): new function, returns 1 if the passed lspec (or the
+ current locale) indicates that the locale is UTF-8. Called from
+ _rl_init_eightbit
+
+lib/readline/rlprivate.h
+ - extern declaration for _rl_utf8locale
+
+locale.c
+ - locale_utf8locale: new flag variable, set to non-zero if the current
+ locale is UTF-8 (currently unused)
+ - locale_isutf8(): new function, returns 1 if the passed lspec (or the
+ current locale) indicates that the locale is UTF-8. Should be called
+ whenever the locale or LC_CTYPE value is modified
+
+aclocal.m4
+ - BASH_WCWIDTH_BROKEN: new test for whether or not wcwidth returns
+ zero-width characters like unicode combining characters as having
+ display length 1; define WCWIDTH_BROKEN in this case
+
+config.h.in
+ - WCWIDTH_BROKEN: new define
+
+lib/readline/rlmbutil.h
+ - change WCWIDTH macro to use _rl_utf8locale and the full range of
+ Unicode combining characters (U+0300-U+036F)
+
+ 5/19
+ ----
+lib/readline/rlprivate.h
+ - _rl_search_context: new member, prevc, will hold character read
+ prior to lastc
+
+lib/readline/isearch.c
+ - _rl_isearch_dispatch: if the character causes us to index into
+ another keymap, save that character in cxt->prevc
+ - _rl_isearch_dispatch: if we index into another keymap, but don't
+ find a function that's special to i-search, and the character that
+ caused us to index into that keymap would have terminated the
+ search, push back cxt->prevc and cxt->lastc to make it appear as
+ if `prevc' terminated the search, and execute lastc as a command.
+ We have to push prevc back so we index into the same keymap before
+ we read lastc. Fixes bug report from Davor Cubranic
+ <cubranic@stat.ubc.ca>
+
+ 5/20
+ ----
+expr.c
+ - expr_bind_variable: pay attention to the return value from
+ bind_variable and check whether or not we should error out due to
+ a readonly or noassign variable. Fixes bug reported by Eric
+ Blake <eblake@redhat.com>
+
+ 5/26
+ ----
+
+lib/readline/search.c
+ - include histlib.h for ANCHORED_SEARCH defines
+ - rl_history_search_flags: new variable, holds ANCHORED_SEARCH flag for
+ the duration of a history search
+ - rl_history_search_reinit: takes a new flags variable, defines whether
+ or not the search is anchored; assigned to rl_history_search_flags
+ - rl_history_serarch_reinit: if ANCHORED_SEARCH flag passed, add ^ to
+ beginning of search string; otherwise search string is unmodified
+ - rl_history_search_internal: set rl_point appropriately based on
+ whether or not rl_history_search_flags includes ANCHORED_SEARCH
+ - rl_history_substr_search_forward: new function, for non-anchored
+ substring search forward through history for string of characters
+ preceding rl_point
+ - rl_history_substr_search_backward: new function, for non-anchored
+ substring search backward through history for string of characters
+ preceding rl_point. Original code from Niraj Kulkarni
+ <kulkarniniraj14@gmail.com>
+
+lib/readline/readline.h
+ - extern declarations for rl_history_substr_search_{for,back}ward
+
+lib/readline/funmap.c
+ - history-substring-search-forward: new bindable command, invokes
+ rl_history_substr_search_forward
+ - history-substring-search-backward: new bindable command, invokes
+ rl_history_substr_search_backward
+
+lib/readline/doc/{rluser.texi,readline.3}
+ - document history-substring-search-forward and
+ history-substring-search-backward
+
+ 5/27
+ ----
+{nojobs,jobs}.c
+ - add support for DONT_REPORT_SIGTERM so that the shell doesn't print
+ a message when a job exits due to SIGTERM since that's the default
+ signal sent by the kill builtin. Suggested by Marc Herbert
+ <mark.herbert@gmail.com>
+
+config-top.h
+ - DONT_REPORT_SIGTERM: new user-modifiable setting. Commented out
+ by default
+
+ 5/28
+ ----
+lib/readline/bind.c
+ - _rl_skip_to_delim: skip to a closing double quote or other delimiter,
+ allowing backslash to quote any character, including the delimiter
+ - rl_parse_and_bind: call _rl_skip_to_delim instead of using inline
+ code
+ - rl_parse_and_bind: allow quoted strings as the values of string
+ variables. Variable values without double quotes have trailing
+ whitespace removed (which still allows embedded whitespace, for
+ better or worse). Fixes problem with string variables not matching
+ in `set' command if values happen to have trailing spaces or tabs
+ (debian bash bug #602762), but introduces slight incompatibility.
+
+ 5/29
+ ----
+doc/{bash.1,bashref.texi}
+ - clarify unset description to specify that without options, a
+ variable, then a shell function if there is no variable by that
+ name, is unset. Fixes discrepancy reported by Mu Qiao
+ <qiaomuf@gentoo.org>
+
+ 6/4
+ ----
+doc/{bash.1,bashref.texi}
+ - clarify description of LINES and COLUMNS (and checkwinsize shopt
+ option) to make it clear that only interactive shells set a
+ handler for SIGWINCH and update LINES and COLUMNS. Original
+ report submitted by Jonathan Nieder <jrnieder@gmail.com>
+
+arrayfunc.c
+ - expand_compound_array_assignment: defer expansion of words between
+ parens when performing compound assignmnt to an associative array
+ variable
+ - assign_compound_array_list: perform the same expansions when doing
+ a compound array assignment to an associative array variable as
+ when doing a straight array index assignment. The idea is that
+ foo=( [ind1]=bar [ind2]=quux)
+ is the same as
+ foo[ind1]=bar ; foo[ind2]=quux
+
+ This fixes problems with double-expansion and quote removal being
+ performed on the array indices
+
+ 6/13
+ ----
+doc/{bash.1,bashref.texi}
+ - Add a little text to make it clear that the locale determines how
+ range expressions in glob patterns are handled.
+
+
+ 6/21
+ ----
+builtins/read.def
+ - display a message and return error status if -a is used with an
+ existing associative array. Fixes bug reported by Curtis Doty
+ <curtis@greenkey.net>
+
+ 6/24
+ ----
+{jobs,nojobs}.c
+ - non-interactive shells now react to the setting of checkwinsize
+ and set LINES and COLUMNS after a foreground job exits. From a
+ suggestion by Leslie Rhorer <lrhorer@satx.rr.com>
+
+doc/{bash.1,bashref.texi}
+ - checkwinsize: remove language saying that only interactive shells
+ check the window size after each command
+
+lib/readline/histfile.c
+ - history_backupfile: new file, creates a backup history file name
+ given a filename (appending `-')
+ - history_do_write: when overwriting the history file, back it up
+ before writing. Restore backup file on a write error. Suggested
+ by chkno@chkno.net
+
+bashline.c
+ - find_cmd_name: two new arguments, return the start and end of the
+ actual text string used to find the command name, without taking
+ whitespace into account
+ - attempt_shell_completion: small changes to make sure that completion
+ attempted at the beginning of a non-empty line does not find a
+ programmable completion, even if the command name starts at point
+ - attempt_shell_completion: small change to make sure that completion
+ does not find a progcomp when in whitespace before the command
+ name
+ - attempt_shell_completion: small change to make sure that completion
+ does not find a progcomp when point is at the first character of a
+ command name, even when there is leading whitespace (similar to
+ above). Fixes problems noted by Ville Skytta <ville.skytta@iki.fi>
+
+subst.c
+ - brace_expand_word_list: since the individual strings in the strvec
+ returned by brace_expand are already allocated, don't copy them to
+ newly-allocated memory when building the WORD_LIST, just use them
+ intact
+
+locale.c
+ - locale_mb_cur_max: cache value of MB_CUR_MAX when we set or change
+ the locale to avoid a function call every time we need to read it
+
+shell.h
+ - new struct to save shell_input_line and associated variables:
+ shell_input_line_state_t
+ - add members of sh_parser_state_t to save and restore token and the
+ size of the token buffer
+
+parse.y
+ - {save,restore}_input_line_state: new functions to save and restore
+ shell_input_line and associated variables
+ - {save,restore}_parser_state: add code to save and restore the token
+ and token buffer size
+ - xparse_dolparen: call save_ and restore_input_line_state to avoid
+ problems with overwriting shell_input_line when we recursively
+ call the parser to parse a command substitution. Fixes bug
+ reported by Rui Santos <rsantos@grupopie.com>
+
+include/shmbutil.h
+ - use locale_mb_cur_max instead of MB_CUR_MAX in ADVANCE_CHAR and
+ similar macros
+
+lib/glob/smatch.c
+ - rangecmp,rangecmp_wc: change to take an additional argument, which
+ forces the use of strcoll/wscoll when non-zero. If it's 0, a new
+ variable `glob_asciirange' controls whether or not we use strcoll/
+ wscoll. If glob_asciirange is non-zero, we use straight
+ C-locale-like ordering. Suggested by Aharon Robbins
+ <arnold@skeeve.com>
+
+ 6/30
+ ----
+execute_cmd.c
+ - execute_pipeline: make sure the lastpipe code is protected by
+ #ifdef JOB_CONTROL. Fixes problem reported by Thomas Cort
+ <tcort@minix3.org>
+
+ 7/2
+ ---
+lib/readline/complete.c
+ - EXPERIMENTAL: remove setting of _rl_interrupt_immediately around
+ completion functions that touch the file system. Idea from Jan
+ Kratochvil <jan.ktratochvil@redhat.com> and the GDB development
+ team
+
+lib/readline/signals.c
+ - rl_signal_handler: if we're in callback mode, don't interrupt
+ immediately on a SIGWINCH
+
+ 7/3
+ ---
+bashline.c
+ - set_directory_hook: and its siblings are a new set of functions to
+ set, save, and restore the appropriate directory completion hook
+ - change callers to use {set,save,restore}_directory_hook instead of
+ manipulating rl_directory_rewrite_hook directly
+ - dircomplete_expand: new variable, defaults to 0, if non-zero causes
+ directory names to be word-expanded during word and filename
+ completion
+ - change {set,save,restore}_directory_hook to look at dircomplete_expand
+ and change rl_directory_completion_hook or rl_directory_rewrite_hook
+ appropriately
+
+bashline.h
+ - extern declaration for set_directory_hook so shopt code can use it
+
+ 7/6
+ ---
+builtins/shopt.def
+ - globasciiranges: new settable shopt option, makes glob ranges act
+ as if in the C locale (so b no longer comes between A and B).
+ Suggested by Aharon Robbins <arnold@skeeve.com>
+
+ 7/7
+ ---
+doc/{bash.1,bashref.texi}
+ - document new `globasciiranges' shopt option
+
+ 7/8
+ ---
+builtins/shopt.def
+ - direxpand: new settable option, makes filename completion expand
+ variables in directory names like bash-4.1 did.
+ - shopt_set_complete_direxpand: new function, does the work for the
+ above by calling set_directory_hook
+
+doc/{bash.1,bashref.texi}
+ - document new `direxpand' shopt option
+
+ 7/15
+ ----
+lib/readline/isearch.c
+ - _rl_isearch_dispatch: when adding character to search string, use
+ cxt->lastc (which we use in the switch statement) instead of c,
+ since lastc can be modified earlier in the function
+
+ 7/18
+ ----
+lib/readline/rlprivate.h
+ - _rl_search_context: add another member to save previous value of
+ (multibyte) lastc: pmb is to mb as prevc is to lastc
+
+lib/readline/isearch.c:
+ - _rl_isearch_dispatch: if a key sequence indexes into a new keymap,
+ but doesn't find any bound function (k[ind].function == 0) or is
+ bound to self-insert (k[ind].function == rl_insert), back up and
+ insert the previous character (the one that caused the index into a
+ new keymap) and arrange things so the current character is the next
+ one read, so both of them end up in the search string. Fixes bug
+ reported by Clark Wang <dearvoid@gmail.com>
+ - _rl_isearch_dispatch: a couple of efficiency improvements when adding
+ characters to the isearch string
+
+ 7/24
+ ----
+lib/readline/isearch.c
+ - _rl_isearch_dispatch: save and restore cxt->mb and cxt->pmb
+ appropriately when in a multibyte locale
+
+doc/{bash.1,bashref.texi}
+ - correct description of {x}>file (and other redirection operators
+ that allocate a file descriptor) to note the the fd range is
+ greater than or equal to 10. Fixes problem reported by
+ Christian Ullrich
+
+lib/readline/signals.c
+ - rl_signal_handler: don't interrupt immediately if in callback mode
+
+lib/readline/callback.c
+ - rl_callback_read_char: install signal handlers only when readline
+ has control in callback mode, so readline's signal handlers aren't
+ called when the application is active (e.g., between the calls to
+ rl_callback_handler_install and rl_callback_read_char). If the
+ readline signal handlers only set a flag, which the application
+ doesn't know about, the signals will effectively be ignored until
+ the next time the application calls into the readline callback
+ interface. Fixes problem of calling unsafe functions from signal
+ handlers when in callback mode reported by Jan Kratochvil
+ <jan.kratochvil@redhat.com>
+
+execute_cmd.c
+ - fix_assignment_words: when in Posix mode, the `command' builtin
+ doesn't change whether or not the command name it protects is an
+ assignment builtin. One or more instances of `command'
+ preceding `export', for instance, doesn't make `export' treat its
+ assignment statement arguments differently. Posix interpretation
+ #351
+
+doc/{bash.1,bashref.texi}
+ - document new Posix-mode behavior of `command' when preceding builtins
+ that take assignment statements as arguments
+
+builtins/printf.def
+ - printstr: if fieldwidth or precision are < 0 or > INT_MAX when
+ supplied explicitly (since we take care of the `-' separately),
+ clamp at INT_MAX like when using getint(). Fixes issue reported
+ by Ralph Coredroy <ralph@inputplus.co.uk>
+
+ 7/25
+ ----
+lib/readline/chardefs.h
+ - isxdigit: don't define if compiling with c++; declared as a c++
+ template function. Fixes bug reported by Miroslav Lichvar
+ <mlichvar@redhat.com>
+
+builtins/printf.def
+ - getint: if garglist == 0, return whatever getintmax returns (0).
+ Fixes bug reported by Ralph Coredroy <ralph@inputplus.co.uk>
+
+ 7/28
+ ----
+doc/{bash.1,bashref.texi}
+ - minor changes to the descriptions of the cd and pushd builtins
+
+lib/sh/zread.c
+ - zsyncfd: change variable holding return value from lseek to
+ off_t. Bug report and fix from Gregory Margo <gmargo@pacbell.net>
+
+ 8/1
+ ---
+expr.c
+ - don't check for division by 0 when in a context where no evaluation
+ is taking place. Fixes bug reported by dnade.ext@orange-ftgroup.com
+
+ 8/6
+ ---
+execute_cmd.c
+ - execute_command_internal: the parent branch of the subshell code
+ (where the child calls execute_in_subshell) should not close all
+ open FIFOs with unlink_fifo_list if it's part of a shell function
+ that's still executing. Fixes bug reported by Maarten Billemont
+ <lhunath@lyndir.com>
+
+ 8/9
+ ---
+builtins/common.c
+ - get_exitstat: return EX_BADUSAGE (2) on a non-numeric argument
+
+builtins/return.def
+ - return_builtin: just call get_exitstat to get the return status,
+ let it handle proper parsing and handling of arguments. Fixes
+ issue most recently raised by Linda Walsh <bash@tlinx.org>.
+ Reverses change from 9/11/2008 (see above)
+
+ 8/16
+ ----
+doc/{bash.1,bashref.texi}
+ - clean up `set -e' language to make it clearer that any failure of
+ a compound command will cause the shell to exit, not just subshells
+ and brace commands
+
+ 8/17
+ ----
+configure.in
+ - make the various XXX_FOR_BUILD variables `precious' to autoconf to
+ avoid stale data
+ - change how CC_FOR_BUILD is initialized when cross-compiling and not,
+ but do not change behavior
+ - initialize CFLAGS_FOR_BUILD to -g when cross-compiling
+ - initialize LIBS_FOR_BUILD to $(LIBS) when not cross-compiling, empty
+ when cross-compiling
+ - create AUTO_CFLAGS variable to hold basic CFLAGS defaults; used when
+ CFLAGS not inherited from environment (like effect of old
+ auto_cflags variable)
+ - substitute LIBS_FOR_BUILD into output Makefiles
+ [changes inspired by bug report from Nathan Phillip Brink
+ <ohnobinki@ohnopublishing.net> -- gentoo bug 378941]
+
+builtins/Makefile.in
+ - substitute LIBS_FOR_BUILD from configure, not strictly initialized
+ to $(LIBS)
+
+ 8/27
+ ----
+doc/{bash.1,bashref.texi}
+ - minor changes to the here string description to clarify the
+ expansions performed on the word
+
+support/shobj-conf
+ - handle compilation on Lion (Mac OS X 10.7/darwin11) with changes
+ to darwin stanzas. Fixes readline bug reported by Vincent
+ Sheffer <vince.sheffer@apisphere.com>
+
+lib/sh/strtrans.c
+ - ansic_wshouldquote: check a string with multi-byte characters for
+ characters that needs to be backslash-octal escaped for $'...'
+ - ansic_shouldquote: if is_basic fails for one character, let
+ ansic_wshouldquote examine the rest of the string and return what
+ it returns. From a patch sent by Roman Rakus <rrakus@redhat.com>
+
+ 8/30
+ ----
+lib/sh/strtrans.c
+ - ansic_quote: changes to quote (or not) multibyte characters. New
+ code converts them to wide characters and uses iswprint to check
+ valid wide chars. From a patch sent by Roman Rakus
+ <rrakus@redhat.com>
+
+ 9/7
+ ---
+lib/sh/shquote.c
+ - sh_backslash_quote: change to be table-driven so we can use a
+ different table if we want to
+ - sh_backslash_quote: takes a second char table[256] argument;
+
+externs.h
+ - sh_backslash_quote: add second argument to function prototype
+
+bashline.c,braces.c,parse.y,builtins/printf.def
+ - change callers of sh_backslash_quote to add second argument
+
+bashline.c
+ - filename_bstab: table of characters to pass to sh_backslash_quote;
+ characters with value 1 will be backslash-quoted
+ - set_filename_bstab: turn on characters in filename backslash-quote
+ table according to passed string argument
+ - call set_filename_bstab every time rl_filename_quote_characters is
+ assigned a value
+ - bash_quote_filename: call sh_backslash_quote with filename_bstab
+ as second argument. This allows other characters in filenames to
+ be quoted without quoting, for instance, a dollar sign in a shell
+ variable reference
+
+ 9/8
+ ---
+bashline.c
+ - complete_fullquote: new variable, controls table passed to
+ sh_backslash_quote. If non-zero (the default), the standard set
+ of shell metacharacters -- as in bash versions up to and including
+ bash-4.2 -- gets backslash-quoted by the completion code. If zero,
+ sh_backslash_quote gets the table with the characters in the
+ variable reference removed, which means they are removed from the
+ set of characters to be quoted in filenames
+
+ 9/10
+ ----
+bashline.c
+ - bash_filename_stat_hook: new function, designed to expand variable
+ references in filenames before readline passes them to stat(2)
+ to determine whether or not they are a directory
+
+ 9/15
+ ----
+builtins/declare.def
+ - if assign_array_element fails due to a bad (or empty) subscript, mark
+ it as an assignment error and don't attempt any further processing
+ of that declaration. Fixes segfault bug reported by Diego Augusto
+ Molina <diegoaugustomolina@gmail.com>
+
+ 9/19
+ ----
+expr.c
+ - exppower: replace the simple exponentiation algorithm with an
+ implementation of exponentiation by squaring. Inspired by report
+ from Nicolas ARGYROU <nargy@yahoo.com>
+
+bashline.c
+ - bash_quote_filename: check for rtext being non-null before
+ dereferencing it
+ - set_saved_history: operate_and_get_next assumes that the previous
+ line was added to the history, even when the history is stifled and
+ at the max number of entries. If it wasn't, make sure the history
+ number is incremented properly. Partial fix for bug reported by
+ gregrwm <backuppc-users@whitleymott.net>
+
+doc/{bash.1,bashref.texi},lib/readline/doc/{hsuser,rluser}.texi
+ - minor editorial changes inspired by suggestions from
+ Roger Zauner <rogerx.oss@gmail.com>
+
+ 9/20
+ ----
+lib/intl/localealias.c
+ - read_alias_file: close resource leak (fp) when returning on error
+
+ 9/22
+ ----
+execute_command.c
+ - execute_intern_function: implement Posix interpretation 383 by making
+ it an error to define a function with the same name as a special
+ builtin when in Posix mode.
+ http://austingroupbugs.net/view.php?id=383#c692
+
+ 9/25
+ ----
+doc/{bash.1,bashref.texi}
+ - formatting and some content changes from Benno Schulenberg
+ <bensberg@justemail.net>
+ - document new posix-mode behavior from interp 383 change of 9/22
+
+ 9/30
+ ----
+execute_cmd.c
+ - shell_execve: add strerror to error message about executable file
+ that shell can't execute as a shell script. From suggestion by
+ daysleeper <daysleeper@centrum.cz>
+
+ 10/1
+ ----
+bashhist.c
+ - maybe_add_history: act as if literal_history is set when parser_state
+ includes PST_HEREDOC, so we save the bodies of here-documents just
+ as they were entered. Fixes bug reported by Jonathan Wakely
+ <bugs@kayari.org>
+ - bash_add_history: make sure that the second and subsequent lines of
+ a here document don't have extra newlines or other delimiting
+ chars added, since they have the trailing newline preserved, when
+ `lithist' is set and history_delimiting_chars isn't called
+
+execute_cmd.c
+ - execute_command_internal: avoid fd exhaustion caused by using
+ process substitution in loops inside shell functions by using
+ copy_fifo_list and close_new_fifos (). Fixes debian bash bug
+ 642504
+
+lib/readline/complete.c
+ - new variable, rl_filename_stat_hook, used by append_to_match. If
+ filename completion is desired, and rl_filename_stat_hook points
+ to a function, call that function to expand the filename in an
+ application-specific way before calling stat.
+
+bashline.c
+ - bash_default_completion: if variable completion returns a single
+ match, use bash_filename_stat_hook and file_isdir to determine
+ whether or not the variable name expands to a directory. If it
+ does, set the filename_append_character to `/'. This is not
+ perfect, so we will see how it works out. Adds functionality
+ requested by Peter Toft <pto@linuxbog.dk> and Patrick Pfeifer
+ <patrick@pfeifer.de>
+ - rl_filename_stat_hook: assigned bash_filename_stat_hook, so things
+ like $HOME/Downloads (after completion) have a slash appended.
+ In general, this causes the stat hook to be called whenever
+ filename completion is appended. Adds functionality requested by
+ Patrick Pfeifer <patrick@pfeifer.de>
+
+lib/readline/readline.h
+ - new extern declaration for rl_filename_stat_hook
+
+lib/readline/doc/rltech.texi
+ - rl_directory_rewrite_hook: now documented
+ - rl_filename_stat_hook: document
+
+pcomplete.c
+ - gen_action_completions: in the CA_DIRECTORY case, turn off
+ rl_filename_completion_desired if it was off before we called
+ rl_filename_completion_function and we didn't get any matches.
+ Having it on causes readline to quote the matches as if they
+ were filenames. Adds functionality requested by many,
+ including Clark Wang <dearvoid@gmail.com>
+
+assoc.[ch]
+ - assoc_replace: new function, takes the same arguments as
+ assoc_insert, but returns the old data instead of freeing it
+ - assoc_insert: if the object returned by hash_insert doesn't have
+ the same value for its key as the key passed as an argument, we
+ are overwriting an existing value. In this case, we can free the
+ key. Fixes bug reported by David Parks <davidparks21@yahoo.com>
+
+ 10/5
+ ----
+print_cmd.c
+ - indirection_level_string: small change to only re-enable `x'
+ option after calling decode_prompt_string if it was on before. In
+ normal mode, it will be, but John Reiser <jreiser@bitwagon.com>
+ has a novel use for that code in conjunction with a pre-loaded
+ shared library that traces system call usage in shell scripts
+
+ 10/10
+ -----
+Makefile.in
+ - Fix from Mike Frysinger <vapier@gentoo.org> to avoid trying to
+ build y.tab.c and y.tab.h with two separate runs of yacc if
+ parse.y changes. Problem with parallel makes
+ - Fix from Mike Frysinger <vapier@gentoo.org> to avoid subdirectory
+ builds each trying to make version.h (and all its dependencies)
+
+lib/sh/Makefile.in
+ - remove some dependencies on version.h where it doesn't make sense
+
+variables.c
+ - initialize_shell_variables: while reading the environment, a shell
+ running in posix mode now checks for SHELLOPTS being readonly (it
+ gets set early on in main()) before trying to assign to it. It
+ saves an error message and the variable gets parsed as it should.
+ Fixes bug reported by Len Giambrone <Len.Giambrone@intersystems.com>
+
+ 10/14
+ -----
+doc/{bash.1,bashref.texi}
+ - add to the "duplicating file descriptors" description that >&word
+ doesn't redirect stdout and stderr if word expands to `-'
+ - add to the "appending standard output and standard error"
+ description a note that >&word, where word is a number or `-',
+ causes other redirection operators to apply for sh and Posix
+ compatibility reasons. Suggested by Greg Wooledge
+ <wooledg@eeg.ccf.org>
+
+ 10/15
+ -----
+pcomplete.c
+ - change pcomp_filename_completion_function to only run the filename
+ dequoting function in the cases (as best as it can figure) where
+ readline won't do it via rl_filename_completion_function. Based
+ on reports from <lolilolicon@gmail.com>
+
+ 10/19
+ -----
+bashline.c
+ - attempt_shell_completion: add call to set_directory_hook() to make
+ sure the rewrite functions are correct. It's cheap and doesn't
+ hurt
+ - command_word_completion_function: if completing a command name that
+ starts with `.' or `..', temporarily suppress the effects of the
+ `direxpand' option and restore the correct value after calling
+ rl_filename_completion_function. If it's enabled, the directory
+ name will be rewritten and no longer match `./' or `../'. Fixes
+ problem reported by Michael Kalisz <michael@kalisz.homelinux.net>
+
+ 10/22
+ -----
+builtins/history.def
+ - push_history: make sure remember_on_history is enabled before we
+ try to delete the last history entry -- the `history -s' command
+ might not have been saved. Fixes bug reported by
+ lester@vmw-les.eng.vmware.com
+
+lib/readline/complete.c
+ - rl_callback_read_char: add calls to a macro CALLBACK_READ_RETURN
+ instead of straight return; add same call at end of function.
+ Placeholder for future work in deinstalling signal handlers when
+ readline is not active
+
+ 10/25
+ -----
+expr.c
+ - exp2: catch arithmetic overflow when val1 == INTMAX_MIN and val2 == -1
+ for DIV and MOD and avoid SIGFPE. Bug report and pointer to fix
+ from Jaak Ristioja <jaak.ristioja@cyber.ee>
+ - expassign: same changes for arithmetic overflow for DIV and MOD
+
+ 10/28
+ -----
+subst.c
+ - parameter_brace_expand: allow pattern substitution when there is an
+ expansion of the form ${var/} as a no-op: replacing nothing with
+ nothing
+ - parameter_brace_patsub: don't need to check for PATSUB being NULL;
+ it never is
+
+flags.c
+ - if STRICT_POSIX is defined, initialize history_expansion to 0, since
+ history expansion (and its treatment of ! within double quotes) is
+ not a conforming posix environment. From austin-group issue 500
+
+lib/readline/histexpand.c
+ - history_expand: when processing a string within double quotes
+ (DQUOTE == 1), make the closing double quote inhibit history
+ expansion, as if the word were outside double quotes. In effect,
+ we assume that the double quote is followed by a character in
+ history_no_expand_chars. tcsh and csh seem to do this. This
+ answers a persistent complaint about history expansion
+
+ 10/29
+ -----
+make_cmd.c
+ - make_arith_for_command: use skip_to_delim to find the next `;'
+ when breaking the string between the double parens into three
+ separate components instead of a simple character loop. Fixes
+ bug reported by Dan Douglas <ormaaj@gmail.com>
+
+ 11/2
+ ----
+Makefile.in
+ - make libbuiltins.a depend on builtext.h to serialize its creation
+ and avoid conflict between multiple invocations of mkbuiltins.
+ Fix from Mike Frysinger <vapier@gentoo.org>
+
+ 11/5
+ ----
+findcmd.c
+ - user_command_matches: if stat(".", ...) returns -1, set st_dev
+ and st_ino fields in dotinfo to 0 to avoid same_file matches
+ - find_user_command_in_path: check stat(2) return the same way
+
+lib/glob/glob.c
+ - glob_vector: don't call strlen(pat) without checking pat == 0
+ - glob_dir_to_array: make sure to free `result' and all allocated
+ members before returning error due to malloc failure
+ - glob_vector: make sure to free `nextname' and `npat' on errors
+ (mostly when setting lose = 1)
+ - glob_vector: if flags & GX_MATCHDIRS but not GX_ALLDIRS, make
+ sure we free `subdir'
+ - glob_filename: when expanding ** (GX_ALLDIRS), make sure we
+ free temp_results (return value from glob_vector)
+
+lib/glob/xmbsrtowcs.c
+ - xdupmbstowcs: fix call to realloc to use sizeof (char *) instead
+ of sizeof (char **) when assigning idxtmp
+
+execute_cmd.c
+ - print_index_and_element: return 0 right away if L == 0
+ - is_dirname: fix memory leak by freeing `temp'
+ - time_command: don't try to deref NULL `command' when assigning
+ to `posix_time'
+ - shell_execve: null-terminate `sample' after READ_SAMPLE_BUF so it's
+ terminated for functions that expect that
+
+builtins/read.def
+ - read_builtin: don't call bind_read_variable with a potentially-null
+ string
+
+pcomplete.c
+ - gen_command_matches: don't call dispose_word_desc with a NULL arg
+ - gen_compspec_completions: fix memory leak by freeing `ret' before
+ calling gen_action_completions (tcs, ...). happens when
+ performing directory completion as default and no completions
+ have been generated
+ - gen_progcomp_completions: make sure to set foundp to 0 whenever
+ returning NULL
+ - it_init_aliases: fix memory leak by freeing alias_list before
+ returning
+
+bashline.c
+ - command_word_completion_function: don't call restore_tilde with a
+ NULL directory_part argument
+ - bash_directory_expansion: bugfix: don't throw away results of
+ rl_directory_rewrite_hook if it's set and returns non-zero
+ - bind_keyseq_to_unix_command: free `kseq' before returning error
+
+arrayfunc.c
+ - assign_array_element_internal: make sure `akey' is freed if non-null
+ before returning error
+ - assign_compound_array_list: free `akey' before returning error
+ - array_value_internal: free `akey' before returning error
+ - unbind_array_element: free `akey' before returning error
+
+subst.c
+ - array_length_reference: free `akey' before returning error in case
+ of expand_assignment_string_to_string error
+ - array_length_reference: free `akey' after call to assoc_reference
+ - skip_to_delim: if skipping process and command substitution, free
+ return value from extract_process_subst
+ - parameter_brace_substring: free `val' (vtype == VT_VARIABLE) before
+ returning if verify_substring_values fails
+ - parameter_brace_expand: remove two duplicate lines that allocate
+ ret in parameter_brace_substring case
+ - parameter_brace_expand: convert `free (name); name = xmalloc (...)'
+ to use `xrealloc (name, ...)'
+ - parameter_brace_expand: free `name' before returning when handling
+ ${!PREFIX*} expansion
+ - split_at_delims: fix memory leak by freeing `d2' before returning
+
+redir.c
+ - redirection_error: free `filename' if the redirection operator is
+ REDIR_VARASSIGN by assigning allocname
+
+eval.c
+ - send_pwd_to_eterm: fix memory leak by freeing value returned by
+ get_working_directory()
+
+builtins/cd.def
+ - change_to_directory: fix memory leak by freeing return value from
+ resetpwd()
+ - cd_builtin: fix memory leak by freeing value returned by dirspell()
+ - cd_builtin: fix memory leak by freeing `directory' if appropriate
+ before overwriting with return value from resetpwd()
+
+builtins/type.def
+ - describe_command: free `full_path' before overwriting it with return
+ value from sh_makepath
+
+builtins/complete.def
+ - compgen_builtin: fix memory leak by calling strlist_dispose (sl)
+ before overwriting sl with return value from completions_to_stringlist
+
+builtins/hash.def
+ - list_hashed_filename_targets: fix memory leak by freeing `target'
+
+make_cmd.c
+ - make_arith_for_command: free `init', `test', and `step' before
+ returning error on parse error
+
+jobs.c
+ - initialize_job_control: don't call move_to_high_fd if shell_tty == -1
+
+general.c
+ - check_dev_tty: don't call close with an fd < 0
+ - legal_number: deal with NULL `string' argument, return invalid
+
+lib/sh/fmtulong.c
+ - fmtulong: if the `base' argument is invalid, make sure we index
+ buf by `len-1' at maximum
+
+print_cmd.c
+ - print_deferred_heredocs: don't try to dereference a NULL `cstring'
+ - cprintf: make sure to call va_end (args)
+
+variables.c
+ - push_dollar_vars: fix call to xrealloc to use sizeof (WORD_LIST *)
+ instead of sizeof (WORD_LIST **)
+
+lib/sh/zmapfd.c
+ - zmapfd: if read returns error, free result and return -1 immediately
+ instead of trying to reallocate it
+
+ 11/6
+ ----
+execute_cmd.c
+ - cpl_reap: rewrote to avoid using pointer after freeing it; now builds
+ new coproc list on the fly while traversing the old one and sets the
+ right values for coproc_list when done
+
+ 11/12
+ -----
+builtins/set.def
+ - if neither -f nor -v supplied, don't allow a readonly function to
+ be implicitly unset. Fixes bug reported by Jens Schmidt
+ <jens.schmidt35@arcor.de>
+
+lib/readline/callback.c
+ - change CALLBACK_READ_RETURN to clear signal handlers before returning
+ from rl_callback_read_char so readline's signal handlers aren't
+ installed when readline doesn't have control. Idea from Jan
+ Kratochvil <jan.ktratochvil@redhat.com> and the GDB development
+ team
+
+pcomplete.h
+ - COPT_NOQUOTE: new complete/compgen option value
+
+builtins/complete.def
+ - noquote: new complete/compgen option; will be used to disable
+ filename completion quoting
+
+pcomplete.c
+ - pcomp_set_readline_variables: pay attention to COPT_NOQUOTE; turns
+ of rl_filename_quoting_desired if set; turns it on if unset (value
+ is inverted, since default is on)
+
+doc/bash.1,lib/readline/doc/rluser.texi
+ - document new -o noquote option to complete/compgen/compopt
+
+pathexp.c
+ - quote_string_for_globbing: if QGLOB_REGEXP, make sure characters
+ between brackets in an ERE bracket expression are not inappropriately
+ quoted with backslashes. This is a pretty substantial change,
+ should be stressed when opening bash up for alpha and beta tests.
+ Fixes bug pointed out by Stephane Chazleas
+ <stephane_chazelas@yahoo.fr>
+
+doc/{bash.1,bashref.texi}
+ - document that regexp matches can be inconsistent when quoting
+ characters in bracket expressions, since usual quoting characters
+ lose their meaning within brackets
+ - note that regular expression matching when the pattern is stored
+ in a shell variable which is quoted for expansion causes string
+ matching
+
+redir.h
+ - RX_SAVEFD: new flag value; notes that a redirection denotes an
+ fd used to save another even if it's not >= SHELL_FD_BASE
+
+redir.c
+ - do_redirection_internal: when deciding whether or not to reset the
+ close-on-exec flag on a restored file descriptor, trust the value
+ of redirect->flags & RX_SAVCLEXEC even if the fd is < SHELL_FD_BASE
+ if the RX_SAVEFD flag is set
+ - add_undo_redirect: set the RX_SAVEFD flag if the file descriptor
+ limit is such that the shell can't duplicate to a file descriptor
+ >= 10. Fixes a limitation that tripped a coreutils test reported
+ by Paul Eggert <eggert@cs.ucla.edu>
+
+ 11/19
+ -----
+doc/{bash.1,bashref.texi},lib/readline/doc/hsuser.texi
+ - make it clear that bash runs HISTFILESIZE=$HISTSIZE after reading
+ the startup files
+ - make it clear that bash runs HISTSIZE=500 after reading the
+ startup files
+ - make it clear that setting HISTSIZE=0 causes commands to not be
+ saved in the history list
+ - make it clear that setting HISTFILESIZE=0 causes the history file
+ to be truncated to zero size
+
+variables.c
+ - sv_histsize: change so setting HISTSIZE to a value less than 0
+ causes the history to be `unstifled'
+ - sv_histsize: change so setting HISTFILESIZE to a value less than 0
+ results in no file truncation
+ - make it clear that numeric values less than 0 for HISTFILESIZE or
+ HISTSIZE inhibit the usual functions
+
+ 11/23
+ -----
+parse.y
+ - save_input_line_state: add missing `return ls' at the end, since the
+ function is supposed to return its argument. Pointed out by
+ Andreas Schwab <schwab@linux-m68k.org>
+
+builtins/read.def
+ - skip over NUL bytes in input, as most modern shells seem to. Bug
+ report by Matthew Story <matt@tablethotels.com>
+
+lib/readline/vi_mode.c
+ - rl_vi_replace: set _rl_vi_last_key_before_insert to invoking key
+
+ 11/25
+ -----
+builtins/read.def
+ - read_builtin: if xrealloc returns same pointer as first argument,
+ don't bother with the remove_unwind_protect/add_unwind_protect pair
+ - read_builtin: set a flag (`reading') around calls to zread/zreadc
+ and readline()
+ - sigalrm: change to set flag (`sigalrm_seen') and only longjmp if
+ currently in read(2) (reading != 0)
+ - CHECK_ALRM: new macro, checks sigalrm_seen and longjmps if non-zero,
+ behavior of old SIGALRM catching function
+ - read_builtin: call CHECK_ALRM in appropriate places while reading
+ line of input. Fixes bug reported by Pierre Gaston
+ <pierre.gaston@gmail.com>
+
+lib/readline/vi_mode.c
+ - rl_vi_replace: initialize characters before printing characters in
+ vi_replace_keymap to their default values in vi_insertion_keymap,
+ since we're supposed to be in insert mode replacing characters
+ - rl_vi_replace: call rl_vi_start_inserting to set last command to
+ `R' for undo
+ - rl_vi_replace: set _rl_vi_last_key_before_insert to `R' for future
+ use by _rl_vi_done_inserting
+ - vi_save_insert_buffer: new function, broke out code that copies text
+ into vi_insert_buffer from _rl_vi_save_insert
+ - _rl_vi_save_replace: new function, saves text modified by
+ rl_vi_replace (using current point and vi_replace_count to figure
+ it out) to vi_replace_buffer
+ - _rl_vi_save_insert: call vi_save_insert_buffer
+ - _rl_vi_done_inserting: if _rl_vi_last_key_before_insert == 'R', call
+ _rl_vi_save_replace to save text modified in replace mode (uses
+ vi_save_insert_buffer)
+ - _rl_vi_replace_insert: new function, replaces the number of chars
+ in vi_insert_buffer after rl_point with contents ov vi_insert_buffer
+ - rl_vi_redo: call _rl_vi_replace_insert if last command == 'R' and
+ there's something in vi_insert_buffer. Fixes bug with `.' not
+ redoing the most recent `R' command, reported by Geoff Clare
+ <g.clare@opengroup.org> in readline area on savannah
+
+ 11/26
+ -----
+lib/readline/rlprivate.h
+ - RL_SIG_RECEIVED(): evaluate to non-zero if there is a pending signal
+ to be handled
+ - RL_SIGINT_RECEIVED(): evaluate to non-zero if there is a pending
+ SIGINT to be handled
+
+lib/readline/complete.c
+ - remove all mention of _rl_interrupt_immediately
+ - rl_completion_matches: check RL_SIG_RECEIVED after each call to
+ the entry function, call RL_CHECK_SIGNALS if true to handle the
+ signal
+ - rl_completion_matches: if RL_SIG_RECEIVED evaluates to true, free
+ and zero out the match_list this function allocated
+ - rl_completion_matches: if the completion entry function is
+ rl_filename_completion_function, free the contents of match_list,
+ because that function does not keep state and will not free the
+ entries; avoids possible memory leak pointed out by
+ Garrett Cooper <yanegomi@gmail.com>
+ - gen_completion_matches: if RL_SIG_RECEIVED evalutes to true after
+ calling rl_attempted_completion_function, free the returned match
+ list and handle the signal with RL_CHECK_SIGNALS; avoids
+ possible memory leak pointed out by Garrett Cooper
+ <yanegomi@gmail.com>
+ - gen_completion_matches: if RL_SIG_RECEIVED evaluates to true after
+ calling rl_completion_matches, free the returned match list and
+ handle the signal with RL_CHECK_SIGNALS
+
+lib/readline/util.c
+ - rl_settracefp: new utility function to set the tracing FILE *
+
+lib/readline/signals.c
+ - _rl_sigcleanup: pointer to a function that will be called with the
+ signal and a void * argument from _rl_handle_signal
+ - _rl_sigcleanarg: void * that the rest of the code can set to have
+ passed to the signal cleanup function
+ - _rl_handle_signal: if _rl_sigcleanup set, call as
+ (*_rl_sigcleanup) (sig, _rl_sigcleanarg)
+
+lib/readline/rlprivate.h
+ - extern declarations for _rl_sigcleanup and _rl_sigcleanarg
+
+lib/readline/complete.c
+ - _rl_complete_sigcleanup: signal cleanup function for completion code;
+ calls _rl_free_match_list on _rl_sigcleanarg if signal == SIGINT
+ - rl_complete_internal: before calling display_matches if what_to_do
+ == `?', set _rl_sigcleanup to _rl_complete_sigcleanup so the match
+ list gets freed on SIGINT; avoids possible memory leak pointed out
+ by Garrett Cooper <yanegomi@gmail.com>
+ - rl_complete_internal: in default switch case, call _rl_free_match_list
+ before returning to avoid memory leak
+
+doc/bashref.texi
+ - start at a set of examples for the =~ regular expression matching
+ operator, touching on keeping the pattern in a shell variable and
+ quoting portions of the pattern to remove their special meaning
+
+ 12/1
+ ----
+lib/glob/gmisc.c
+ - extglob_pattern: new function, returns 1 if pattern passed as an
+ argument looks like an extended globbing pattern
+
+lib/glob/glob.c
+ - skipname: return 0 immediately if extglob_pattern returns non-zero,
+ let the extended globbing code do the right thing with skipping
+ names beginning with a `.'
+ - mbskipname: return 0 immediately if extglob_pattern returns non-zero,
+ let the extended globbing code do the right thing with skipping
+ names beginning with a `.'. Fixes bug reported by Yongzhi Pan
+ <panyongzhi@gmail.com>
+
+ 12/2
+ ----
+lib/glob/smatch.c
+ - patscan, patscan_wc: no longer static so other parts of the glob
+ library can use them, renamed to glob_patscan, glob_patscan_wc
+
+lib/glob/glob.c
+ - extern declarations for glob_patscan, glob_patscan_wc
+ - wchkname: new function, does skipname on wchar_t pattern and dname,
+ old body of mbskipname after converting to wide chars
+ - extglob_skipname: new function, checks all subpatterns in an extglob
+ pattern to determine whether or not a filename should be skipped.
+ Calls skipname for each subpattern. Dname is only skipped if all
+ subpatterns indicate it should be. Better fix for bug reported by
+ Yongzhi Pan <panyongzhi@gmail.com>
+ - wextglob_skipname: wide-char version of extglob_skipname, calls
+ wchkname instead of calling back into mbskipname for each
+ subpattern to avoid problems with char/wchar_t mismatch
+ - skipname: call extglob_skipname if extglob_pattern returns non-zero
+ - mbskipname: call wextglob_skipname if extglob_pattern returns non-zero
+ - mbskipname: short-circuit immediately if no multibyte chars in
+ pattern or filename
+
+execute_cmd.c
+ - execute_cond_node: added parens to patmatch assignment statement to
+ make intent clearer
+
+ 12/3
+ ----
+configure.in,config.h.in
+ - check for imaxdiv, define HAVE_IMAXDIV if present
+
+expr.c
+ - expassign, exp2: use imaxdiv if available. Doesn't help with checks
+ for overflow from 10/25
+
+ 12/6
+ ----
+lib/readline/complete.c
+ - compute_lcd_of_matches: if we're ignoring case in the matches, only
+ use what the user typed as the lcd if it matches the first match
+ (after sorting) up to the length of what was typed (if what the
+ user typed is longer than the shortest of the possible matches, use
+ the shortest common length of the matches instead). If it doesn't
+ match, use the first of the list of matches, as if case were not
+ being ignored. Fixes bug reported by Clark Wang
+ <dearvoid@gmail.com>
+
+ 12/7
+ ----
+builtins/cd.def
+ - cd_builtin: add code to return error in case cd has more than one
+ non-option argument, conditional on CD_COMPLAINS define (which is
+ not defined anywhere)
+
+doc/{bash.1,bashref.texi}
+ - note that additional arguments to cd following the directory name
+ are ignored. Suggested by Vaclav Hanzl <hanzl@noel.feld.cvut.cz>
+
+ 12/10
+ -----
+lib/readline/input.c
+ - rl_read_key: don't need to increment key sequence length here; doing
+ it leads to an off-by-one error
+
+lib/readline/macro.c
+ - rl_end_kbd_macro: after off-by-one error with rl_key_sequence_length
+ fixed, can decrement current_macro_index by rl_key_sequence_length
+ (length of key sequence that closes keyboard macro)
+
+lib/readline/readline.c
+ - _rl_dispatch_subseq: fix extra increment of rl_key_sequence_length
+ when ESC maps to a new keymap and we're converting meta characters
+ to ESC+key
+ - _rl_dispatch_subseq: better increment of rl_key_sequence_length
+ before we dispatch to a function in the ISFUNC case (where the
+ second increment above should have happened)
+ - rl_executing_keyseq: the full key sequence that ended up executing
+ a readline command. Available to the calling application, maintained
+ by _rl_dispatch_subseq, indexed by rl_key_sequence_length
+ - rl_executing_key: the key that was bound to the currently-executing
+ readline command. Same as the `key' argument to the function
+
+lib/readline/readline.h
+ - rl_executing_keyseq: extern declaration
+ - rl_executing_key: extern declaration
+ - rl_key_sequence_length: declaration moved here from rlprivate.h,
+ now part of public interface
+
+lib/readline/rlprivate.h
+ - new extern declaration for _rl_executing_keyseq_size, buffer size
+ for rl_executing_keyseq
+
+lib/readline/doc/rltech.texi
+ - documented new variables: rl_executing_key, rl_executing_keyseq,
+ rl_key_sequence_length
+
+ 12/13
+ -----
+bashline.c
+ - bash_execute_unix_command: replace ad-hoc code that searches
+ cmd_xmap for correct command with call to rl_function_of_keyseq
+ using rl_executing_keyseq; now supports key sequences longer
+ than two characters. Fixes bug reported by Michael Kazior
+ <kazikcz@gmail.com>
+
+ 12/15
+ -----
+make_cmd.c
+ - make_function_def: don't null out source_file before calling
+ make_command so it can be used later on when the function definition
+ is executed
+
+execute_cmd.c
+ - execute_intern_function: second argument is now FUNCTION_DEF *
+ instead of COMMAND *
+ - execute_command_internal: call execute_intern_function with the
+ new second argument (the entire FUNCTION_DEF instead of just the
+ command member)
+ - execute_intern_function: if DEBUGGER is defined, call
+ bind_function_def before calling bind_function, just like
+ make_function_def does (might be able to take out the call in
+ make_function_def depending on what the debugger does with it).
+ Fixes bug reported by <dethrophes@motd005>
+
+expr.c
+ - more minor changes to cases of INTMAX_MIN % -1 and INTMAX_MIN / 1;
+ fix typos and logic errors
+
+ 12/16
+ -----
+bashline.c
+ - find_cmd_start: change flags to remove SD_NOSKIPCMD so it skips over
+ command substitutions and doesn't treat them as command separators
+ - attempt_shell_completion: instead of taking first return from
+ find_cmd_name as command name to use for programmable completion,
+ use loop to skip over assignment statements. Fixes problem reported
+ by Raphael Droz <raphael.droz+floss@gmail.com>
+ - attempt_shell_completion: if we don't find a command name but the
+ command line is non-empty, assume the other words are all assignment
+ statements and flag that point is in a command position so we can
+ do command name completion
+ - attempt_shell_completion: if the word being completed is the first
+ word following a series of assignment statements, and the
+ command line is non-empty, flag that point is in a command position
+ so we can do command name completion
+
+lib/readline/history.c
+ - history_get_time: atol -> strtol
+
+ 12/18
+ -----
+parse.y
+ - parser_in_command_position: external interface to the
+ command_token_position macro for use by other parts of the shell,
+ like the completion mechanism
+
+externs.h
+ - extern declaration for parser_in_command_position
+
+ 12/19
+ -----
+
+builtins/read.def
+ - read_builtin: make sure all calls to bind_read_variable are passed
+ a non-null string. Fixes bug reported by Dan Douglas
+ <ormaaj@gmail.com>
+
+bashline.c
+ - attempt_shell_completion: mark that we're in a command position if
+ we're at the start of the line and the parser is ready to accept
+ a reserved word or command name. Feature most recently suggested
+ by Peng Yu <pengyu.ut@gmail.com>
+
+ 12/21
+ -----
+lib/readline/bind.c
+ - _rl_escchar: return the character that would be backslash-escaped
+ to denote the control character passed as an argument ('\n' -> 'n')
+ - _rl_isescape: return 1 if character passed is one that has a
+ backslash escape
+ - _rl_untranslate_macro_value: new second argument: use_escapes, if
+ non-zero translate to backslash escapes where possible instead of
+ using straight \C-x for control character `x'. Change callers
+ - _rl_untranslate_macro_value: now global
+
+lib/readline/rlprivate.h
+ - _rl_untranslate_macro_value: extern declaration
+
+lib/readline/{macro.c,readline.h}
+ - rl_print_last_kbd_macro: new bindable function, inspired by patch
+ from Mitchel Humpherys
+
+lib/readline/funmap.c
+ - print-last-kbd-macro: new bindable command, bound to
+ rl_print_last_kbd_macro
+
+lib/readline/doc/{rluser.texi,readline.3},doc/bash.1
+ - print-last-kbd-macro: document.
+
+lib/readline/text.c
+ - _rl_insert_next: if we're defining a macro, make sure the key gets
+ added to the macro text (should really audit calls to rl_read_key()
+ and make sure the right thing is happening for all of them)
+
+bashline.[ch]
+ - print_unix_command_map: new function, prints all bound commands in
+ cmd_xmap using rl_macro_dumper in a reusable format
+
+builtins/bind.def
+ - new -X option: print all keysequences bound to Unix commands using
+ print_unix_command_map. Feature suggested by Dennis Williamson
+ (2/2011)
+
+doc/{bash.1,bashref.texi}
+ - document new `bind -X' option
+
+ 12/24
+ -----
+
+doc/{bash.1,bashref.texi}
+ - add a couple of sentences to the description of the case modification
+ operators making it clearer that each character of parameter is
+ tested against the pattern, and that the pattern should only attempt
+ to match a single character. Suggested by Bill Gradwohl
+ <bill@ycc.com>
+
+ 12/28
+ -----
+shell.c
+ - init_noninteractive: instead of calling set_job_control(0) to
+ unconditionally turn off job control, turn on job control if
+ forced_interactive or jobs_m_flag is set
+ - shell_initialize: call initialize_job_control with jobs_m_flag as
+ argument so `bash -m script' enables job control while running the
+ script
+
+jobs.c
+ - initialize_job_control: if the `force' argument is non-zero, turn on
+ job control even if the shell is not currently interactive
+ (interactive == 0)
+
+ 12/29
+ -----
+
+flags.h
+ - new extern declaration for jobs_m_flag
+
+builtins/{cd,set}.def,doc/{bash.1,bashref.texi}
+ - added text clarifying the descriptions of cd -L and -P, suggested by
+ Padraig Brady <p@draigbrady.com>
+ - slight change to the description of `set -P' about resolving symbolic
+ links
+
+lib/readline/doc/rluser.texi
+ - Added an example to the programmable completion section: _comp_cd,
+ a completion function for cd, with additional verbiage. Text
+ includes a reference to the bash_completion project
+
+ 1/1/2012
+ --------
+jobs.c
+ - set_job_status_and_cleanup: note that a job is stopped due to
+ SIGTSTP (any_tstped) if job_control is set; there's no need to
+ test interactive
+
+ 1/5
+ ---
+quit.h
+ - LASTSIG(): new macro, expands to signal number of last terminating
+ signal received (terminating_signal or SIGINT)
+
+trap.c
+ - first_pending_trap: returns lowest signal number with a trap pending
+ - trapped_signal_received: set to the last trapped signal the shell
+ received in trap_handler(); reset to 0 in run_pending_traps
+
+builtins/read.def
+ - read_builtin: changes to posix-mode (posixly_correct != 0) to make
+ `read' interruptible by a trapped signal. After the trap runs,
+ read returns 128+sig and does not assign the partially-read line
+ to the named variable(s). From an austin-group discussion started
+ by David Korn
+
+ 1/11
+ ----
+doc/{bash.1,bashref.texi}
+ - slight changes to the descriptions of the compat32 and compat40 shell
+ options to clarify their meaning
+
+ 1/12
+ ----
+lib/readline/{colors.[ch],parse-colors.[ch]}
+ - new files, part of color infrastructure support
+
+Makefile.in,lib/readline/Makefile.in
+ - arrange to have colors.o and parse-colors.o added to readline
+ library
+
+{configure,config.h}.in
+ - check for stdbool.h, define HAVE_STDBOOL_H if found
+
+ 1/14
+ ----
+lib/readline/bind.c
+ - colored_stats: new bindable variable, enables using colors to
+ indicate file type when listing completions
+
+lib/readline/complete.c
+ - _rl_colored_stats: new variable, controlled by colored-stats bindable
+ variable
+ - colored_stat_start, colored_stat_end: new functions to set and reset
+ the terminal color appropriately depending on the type of the
+ filename to be printed
+ - print_filename: changes to print colors if `colored-stats' variable
+ set. Changes contributed by Raphael Droz
+ <raphael.droz+floss@gmail.com>
+
+lib/readline/readline.c
+ - rl_initialize_everything: add call to _rl_parse_colors to parse
+ color values out of $LS_COLORS. May have to add to rl_initialize
+ to make more dynamic if LS_COLORS changes (which doesn't happen
+ very often, if at all)
+
+lib/readline/rlprivate.h
+ - _rl_colored_stats: new extern declaration
+
+lib/readline/doc/{readline.3,rluser.texi},doc/bash.1
+ - colored-stats: document new bindable readline variable
+
+lib/readline/colors.c
+ - _rl_print_color_indicator: call rl_filename_stat_hook before calling
+ lstat/stat so we can get color indicators for stuff like
+ $HOME/Applications
+
+lib/readline/complete.c
+ - stat_char: call rl_filename_stat_hook before calling lstat/stat
+
+findcmd.[ch],execute_cmd.c
+ - search_for_command: now takes a second `flags' argument; changed
+ header function prototype and callers
+ - search_for_command: if (flags & 1), put the command found in $PATH
+ into the command hash table (previous default behavior)
+
+execute_cmd.c
+ - is_dirname: call search_for_command with flags argument of 0 so it
+ doesn't try to put something in the command hash table
+
+bashline.c
+ - bash_command_name_stat_hook: a hook function for readline's
+ filename_stat_hook that does $PATH searching the same way that
+ execute_cmd.c:execute_disk_command() does it, and rewrites the
+ passed filename if found. Does not put names into command hash
+ table. This allows command name completion to take advantage
+ of `visible-stats' and `colored-stats' settings.
+ - executable_completion: new function, calls the directory completion
+ hook to expand the filename before calling executable_file or
+ executable_or_directory; change command_word_completion_function to
+ call executable_completion. This allows $HOME/bin/[TAB] to do
+ command completion and display alternatives
+
+ 1/17
+ ----
+pcomplete.c
+ - gen_command_matches: now takes a new second argument: the command
+ name as deciphered by the programmable completion code and used
+ to look up the compspec; changed callers (gen_compspec_completions)
+ - gen_shell_function_matches: now takes a new second argument: the
+ command that originally caused the completion function to be
+ invoked; changed callers (gen_compspec_completions))
+ - build_arg_list: now takes a new second argument: the command name
+ corresponding to the current compspec; changed callers
+ (gen_command_matches, gen_shell_function_matches)
+ - build_arg_list: now uses `cmd' argument to create $1 passed to
+ invoked command or shell function
+ - gen_compspec_completions: if we skipped a null command at the
+ beginning of the line (e.g., for completing `>'), add a new word for
+ it at the beginning of the word list and increment nw and cw
+ appropriately. This is all a partial fix for the shortcoming
+ pointed out by Sung Pae <sungpae@gmail.com>
+
+ 1/18
+ ----
+
+{configure,config.h}.in
+ - new check: check for AUDIT_USER_TTY defined in <linux/audit.h>,
+ define HAVE_DECL_AUDIT_USER_TTY if both are found
+
+lib/readline/rlconf.h
+ - ENABLE_TTY_AUDIT_SUPPORT: new define, allows use of the Linux kernel
+ tty auditing system if it's available and enabled
+
+lib/readline/util.c
+ - _rl_audit_tty: new function, send a string to the kernel tty audit
+ system
+
+lib/readline/rlprivate.h
+ - _rl_audit_tty: new extern declaration
+
+lib/readline/readline.c
+ - readline: call _rl_audit_tty with line to be returned before returning
+ it if the Linux tty audit system is available and it's been enabled
+ in rlconf.h Original patch from Miroslav Trmac; recent request
+ from Miroslav Lichvar <mlichvar@redhat.com>
+
+ 1/21
+ ----
+
+lib/readline/readline.c:
+ - _rl_dispatch_subseq: add an inter-character timeout for multi-char
+ key sequences. Suggested by <rogerx.oss@gmail.com>. Still needs
+ work to make a user-settable variable
+
+parse.y
+ - shell_getc: make code that uses the pop_alias dependent on ALIAS
+ define
+
+variables.h
+ - sv_tz: extern define should only depend on HAVE_TZSET
+
+expr.c
+ - expr_streval: if ARRAY_VARS is not defined, set lvalue->ind to -1;
+ move assignment to `ind' inside define
+ - expr_bind_array_element: declaration and uses need to be #ifdef
+ ARRAY_VARS
+
+arrayfunc.h
+ - AV_ALLOWALL, AV_QUOTED, AV_USEIND: define to 0 if ARRAY_VARS not
+ defined; used in subst.c unconditionally
+
+sig.h
+ - make the signal blocking functions not dependent on JOB_CONTROL
+
+sig.c
+ - sigprocmask: make the replacement definition not dependent on
+ JOB_CONTROL
+
+trap.c
+ - use BLOCK_SIGNAL/UNBLOCK_SIGNAL instead of code dependent on
+ HAVE_POSIX_SIGNALS and BSD signals
+
+ 1/24
+ ----
+
+print_cmd.c
+ - print_redirection_list: change the conditions under which
+ r_duplicating_output_word is mapped to r_err_and_out to more or
+ less match those used in redir.c. Fixes bug pointed out by
+ Dan Douglas <ormaaj@gmail.com>
+
+
+ 1/29
+ ----
+lib/readline/signals.c
+ - _rl_block_sigwinch,_rl_release_sigwinch: don't compile in bodies
+ unless SIGWINCH is defined. Fixes bug reported by Pierre Muller
+ <pierre.muller@ics-cnrs.unistra.fr>
+
+doc/{bash.1,bashref.texi}
+ - small modifications to the introduction to the REDIRECTION section
+ to describe how redirections can modify file handles
+ - small modification to the section describing base#n to make it
+ clearer that n can be denoted using non-numerics. From a posting
+ by Linda Walsh <bash@tlinx.org>
+
+ 2/2
+ ---
+builtins/printf.def
+ - printf_builtin: make sure vbuf is intialized and non-null when -v
+ is supplied, since other parts of the code assume that it's not
+ null (e.g., bind_printf_variable()). Fixes bug reported by Jim
+ Avera <james_avera@yahoo.com>
+
+ 2/4
+ ---
+lib/readline/undo.c
+ - _rl_free_undo_list: new function, old body of rl_free_undo_list,
+ frees undo entries in UNDO_LIST * passed as argument
+ - rl_free_undo_list: call _rl_free_undo_list
+
+lib/readline/rlprivate.h
+ - _rl_free_undo_list: new extern declaration
+ - _rl_keyseq_timeout: new extern declaration (see below)
+
+lib/readline/misc.c
+ - rl_clear_history: new function. Clears the history list and frees
+ all associated data similar to history.c:clear_history(), but
+ takes rl_undo_list into account and frees and UNDO_LISTs saved as
+ `data' members of a history list entry
+
+lib/readline/doc/rltech.texi
+ - rl_clear_history: documented
+
+lib/readline/readline.c
+ - _rl_keyseq_timeout: new variable to hold intra-key timeout value
+ from 1/21 fix; specified in milliseconds. Default value is 500
+ - _rl_dispatch_subseq: change to use _rl_keyseq_timeout as intra-key
+ timeout if it's greater than 0; no timeout if <= 0
+ - _rl_dispatch_subseq: don't check for queued keyboard input if we have
+ pushed or pending input, or if we're reading input from a macro
+
+lib/readline/bind.c
+ - keyseq-timeout: new bindable variable, shadows _rl_keyseq_timeout
+ - string_varlist: add keyseq-timeout
+ - sv_seqtimeout: new function to modify value of _rl_keyseq_timeout;
+ clamps negative values at 0 for now
+ - _rl_get_string_variable_value: return value for keyseq-timeout
+
+doc/bash.1,lib/readline/doc/{rluser.texi,readline.3}
+ - keyseq-timeout: documented
+
+lib/readline/isearch.c
+ - _rl_isearch_dispatch: modification to fix from 7/18 to not use
+ cxt->keymap and cxt->okeymap, since by the time this code is
+ executed, they are equal. Use `f' to check for rl_insert or
+ unbound func
+ - _rl_isearch_dispatch: if we're switching keymaps, not in
+ callback mode, and don't have pending or pushed input, use
+ _rl_input_queued to resolve a potentially ambiguous key sequence.
+ Suggested by Roger Zauner <rogerx.oss@gmail.com>
+ - _rl_isearch_dispatch: if we have changed keymaps and resolved to
+ an editing function (not self-insert), make sure we stuff the
+ right characters back onto the input after changing the keymap
+ back so the right editing function is executed after the search
+ is terminated. Rest of fix for bug reported by Roger Zauner
+ <rogerx.oss@gmail.com>
+
+ 2/5
+ ---
+builtins/gen-helpfiles.c
+ - new file: reads struct builtin and writes the long docs to files
+ in the `helpdirs' subdirectory. The filename is given in the
+ previously-unused `handle' member of the struct builtin. Links
+ with `tmpbuiltins.o', which is created by Makefile to have the
+ right long documentation. When not cross-compiling, gets the
+ right #defines based on configuration options from config.h instead
+ of trying to parse conditional parts of def files. Fixes
+ shortcoming pointed out by Andreas Schwab <schwab@linux-m68k.org>
+
+builtins/Makefile.in
+ - tmpbuiltins.c: new generated file, created to enable creation of
+ separate helpfiles based on correct #defines instead of trying to
+ parse conditional parts of def files
+ - gen-helpfiles: new program to generate helpfiles, links with
+ tmpbuiltins.o
+ - HELPFILES_TARGET: new target, substituted by configure to `helpdoc'
+ if separate helpfiles requested
+ - targets: new target, libbuiltins.a and $(HELPFILES_TARGET)
+ - CREATED_OBJECTS: new variable, holds created object files for
+ make clean; changed make clean to remove created objects
+ - helpdoc: changed to call gen-helpfiles instead of mkbuiltins
+
+Makefile.in
+ - when building libbuiltins.a, recursively call make with `targets'
+ argument to make sure separate helpfiles get built
+
+configure.in
+ - substitute `helpdoc' as value of HELPFILES_TARGET if
+ --enable-separate-helpfiles supplied as configure argument
+
+builtins/mkbuiltins.c
+ - `-nofunctions': new argument, causes mkbuiltins to not write value
+ for function implementing a particular builtin to struct builtin
+ and to write document file name to `handle' member of struct builtin
+ - no longer writes separate helpfiles; that is left to gen-helpfiles
+
+ 2/8
+ ---
+subst.c
+ - make sure last_command_exit_value is set to a non-zero value before
+ any calls to report_error, since `-e' set will short-circuit
+ report_error. Fixes bug reported by Ewan Mellor
+ <Ewan.Mellor@eu.citrix.com>
+
+variables.c
+ - make_local_array_variable: added second argument; if non-zero,
+ function will return an existing local associative array variable
+ instead of insisting on an indexed array
+
+variable.h,subst.c
+ - make_local_array_variable: changed prototype and caller
+
+builtins/declare.def
+ - declare_internal: add second arg to call to make_local_array_variable;
+ making_array_special, which indicates we're processing an
+ assignment like declare a[b]=c. Fixes seg fault resulting from
+ a being an already-declared local associative array variable in a
+ function. Ubuntu bash bug 928900.
+
+ 2/14
+ ----
+
+execute_cmd.c
+ - execute_command_internal: if redirections into or out of a loop fail,
+ don't try to free ofifo_list unless saved_fifo is non-zero. It's
+ only valid if saved_fifo is set
+
+ 2/15
+ ----
+{arrayfunc,braces,variables}.c
+ - last_command_exit_value: make sure it's set before any calls to
+ report_error, since -e will cause that to exit the shell
+
+builtins/common.c
+ - get_job_by_name: call internal_error instead of report_error so this
+ doesn't exit the shell
+
+ 2/18
+ ----
+builtins/evalstring.c
+ - parse_and_execute: make sure the file descriptor to be redirected to
+ is 1 before calling cat_file. One fix for bug reported by Dan Douglas
+ <ormaaj@gmail.com>
+
+parse.y
+ - read_token_word: don't return NUMBER if a string of all digits
+ resolves to a number that overflows the bounds of an intmax_t.
+ Other fix for bug reported by Dan Douglas <ormaaj@gmail.com>
+
+ 2/19
+ ----
+lib/sh/strtrans.c
+ - ansicstr: use 0x7f as the boundary for characters that translate
+ directly from ASCII to unicode (\u and \U escapes) instead of
+ UCHAR_MAX, since everything >= 0x80 requires more than one byte.
+ Bug and fix from John Kearney <dethrophes@web.de>
+
+builtins/printf.def
+ - tescape: ditto for printf \u and \U escape sequences
+
+ 2/20
+ ----
+lib/sh/unicode.c
+ - u32toutf8: fix to handle encodings up to six bytes long correctly
+ (though technically UTF-8 only has characters up to 4 bytes long).
+ Report and fix from John Kearney <dethrophes@web.de>
+ - u32toutf8: first argument is now an unsigned 32-bit quantity,
+ changed callers (u32cconv) to pass c instead of wc
+ - u32reset: new function, resets local static state to uninitialized
+ (locale information, currently)
+
+locale.c
+ - call u32reset whenever LC_CTYPE/LC_ALL/LANG is changed to reset the
+ cached locale information used by u32cconv. From a report from
+ John Kearney <dethrophes@web.de>
+
+ 2/21
+ ----
+doc/{bash,builtins}.1
+ - minor changes from Bjarni Ingi Gislason <bjarniig@rhi.hi.is>
+
+lib/sh/unicode.c
+ - u32cconv: only assume you can directly call wctomb on the passed
+ value if __STDC_ISO_10646__ is defined and the value is <=
+ 0x7fffffff
+ - stub_charset: return locale as default instead of "ASCII", let
+ rest of code decide what to do with it
+
+lib/readline/parens.c
+ - _rl_enable_paren_matching: make paren matching work in vi insert
+ mode. Bug report from <derflob@derflob.de>
+
+ 2/22
+ ----
+lib/sh/shquote.c
+ - sh_backslash_quote: quote tilde in places where it would be
+ expanded. From a report from John Kearney <dethrophes@web.de>
+
+ 2/23
+ ----
+execute_cmd.c
+ - execute_pipeline: wrap the discard_unwind_frame call in #ifdef
+ JOB_CONTROL, since the frame is only created if JOB_CONTROL is
+ defined. Bug and fix from Doug Kehn <rdkehn@yahoo.com>
+
+ 2/25
+ ----
+error.c
+ - report_error: make sure last_command_exit_value is non-zero before
+ we call exit_shell, since the exit trap may reference it. Call
+ exit_shell with last_command_exit_value to allow exit statuses
+ other than 1
+
+unicode.c
+ - stub_charset: use local static buffer to hold charset, don't change
+ value returned by get_locale_var. Based on idea and code from
+ John Kearney <dethrophes@web.de>
+ - u32toutf16: function to convert unsigned 32-bit value (unicode) to
+ UTF-16. From John Kearney <dethrophes@web.de>
+ - u32cconv: call u32toutf16 if __STDC_ISO_10646__ defined and wchar_t
+ is two bytes, send result to wcstombs, return if not encoding error.
+ From John Kearney <dethrophes@web.de>
+ - u32cconv: return UTF-8 conversion if iconv conversion to local
+ charset is unsupported
+
+ 3/2
+ ---
+lib/readline/complete.c
+ - print_filename: if there is no directory hook, but there is a stat
+ hook, and we want to append a slash to directories, call the stat
+ hook before calling path_isdir on the expanded directory name.
+ Report and pointer to fix from Steve Rago <sar@nec-labs.com>
+
+ 3/3
+ ---
+builtins/evalstring.c
+ - parse_and_execute: fix to change of 2/18: make sure the file
+ descriptor being redirected to is 0 before calling cat_file when
+ we see something like $(< file). Real fix for bug reported by
+ Dan Douglas <ormaaj@gmail.com>
+
+subst.c
+ - parameter_brace_patsub: run the replacement string through quote
+ removal even if the expansion is within double quotes, because
+ the parser and string extract functions treat the quotes and
+ backslashes as special. If they're treated as special, quote
+ removal should remove them (this is the Posix position and
+ compatible with ksh93). THIS IS NOT BACKWARDS COMPATIBLE.
+
+ 3/4
+ ---
+lib/readline/complete.c
+ - rl_menu_complete: fix to make show-all-if-ambiguous and
+ menu-complete-display-prefix work together if both are set. Fix
+ from Sami Pietila <sami.pietila@gmail.com>
+
+ 3/5
+ ---
+bashline.c
+ - dircomplete_expand_relpath: new variable, if non-zero, means that
+ `shopt -s direxpand' should expand relative pathnames. Zero by
+ default, not user-settable yet
+ - bash_directory_completion_hook: if we have a relative pathname that
+ isn't changed by canonicalization or spell checking after being
+ appended to $PWD, then don't change what the user typed. Controlled
+ by dircomplete_expand_relpath
+
+ 3/7
+ ---
+m4/timespec.m4
+ - new macros, cribbed from gnulib and coreutils: find out whether we
+ have `struct timespec' and what file includes it
+
+m4/stat-time.m4
+ - new macros, cribbed from gnulib and coreutils: find out whether the
+ mtime/atime/ctime/etctime fields of struct stat are of type
+ struct timespec, and what the name is
+
+include/stat-time.h
+ - new file, cribbed from gnulib, with additions from coreutils: include
+ the right file to get the struct timespec define, or provide our own
+ replacement. Provides a bunch of inline functions to turn the
+ appropriate members of struct stat into `struct timespec' values,
+ zeroing out the tv_nsec field if necessary
+
+test.c
+ - include "stat-time.h" for the nanosecond timestamp resolution stuff
+ - stat_mtime: new function, returns struct stat and the mod time
+ normalized into a `struct timespec' for the filename passed as the
+ first argument
+ - filecomp: call stat_mtime instead of sh_stat for each filename
+ argument to get the mtime as a struct timespec
+ - filecomp: call timespec_cmp instead of using a straight arithmetic
+ comparison for the -nt and -ot operators, using timespec returned by
+ stat_mtime. Added functionality requested by by Werner Fink
+ <werner@suse.de> for systems that can support it
+
+ 3/10
+ ----
+include/posixdir.h
+ - REAL_DIR_ENTRY: remove dependency on _POSIX_SOURCE, only use feature
+ test macros to decide whether dirent.d_ino is present and usable;
+ define D_INO_AVAILABLE. Report and fix from Fabrizion Gennari
+ <fabrizio.ge@tiscali.it>
+ - D_FILENO_AVAILABLE: define if we can use dirent.d_fileno
+
+lib/sh/getcwd.c
+ - use D_FILENO_AVAILABLE to decide whether or not to compile in
+ _path_checkino and whether or not to call it. Report and initial
+ fix from Fabrizion Gennari <fabrizio.ge@tiscali.it>
+
+lib/readline/signals.c
+ - make sure all occurrences of SIGWINCH are protected by #ifdef
+
+sig.c
+ - make sure all occurrences of SIGCHLD are protected by #ifdef
+
+nojobs.c
+ - make sure SA_RESTART is defined to 0 if the OS doesn't define it
+
+version.c
+ - show_shell_version: don't use string literals in printf, use %s.
+ Has added benefit of removing newline from string to be translated
+
+trap.c
+ - queue_sigchld_trap: new function, increments the number of pending
+ SIGCHLD signals by the argument, which is by convention the number
+ of children reaped in a call to waitchld()
+
+trap.h
+ - queue_sigchld_trap: new extern declaration
+
+jobs.c
+ - waitchld: if called from the SIGCHLD signal handler (sigchld > 0),
+ then call queue_sigchld_trap to avoid running the trap in a signal
+ handler context. Report and original fix from Siddhesh Poyarekar
+ <siddhesh@redhat.com>
+
+lib/sh/unicode.c
+ - u32tocesc: take an unsigned 32-bit quantity and encode it using
+ ISO C99 string notation (\u/\U)
+ - u32cconv: call u32tocesc as a fallback instead of u32cchar
+ - u32cconv: call u32tocesc if iconv cannot convert the character.
+ Maybe do the same thing if iconv_open fails
+ - u32reset: call iconv_close on localconv if u32init == 1
+
+ 3/11
+ ----
+config-top.h
+ - CHECKWINSIZE_DEFAULT: new define, set to initial value of
+ check_window_size (shopt checkwinsize): 0 for off, 1 for on.
+ Default is 0
+
+{jobs,nojobs}.c
+ - check_window_size: default initial value to CHECKWINSIZE_DEFAULT
+
+ 3/13
+ ----
+doc/bashref.texi
+ - change text referring to the copying restrictions to that
+ recommended by the FSF (no Front-Cover Texts and no Back-Cover
+ Texts)
+
+lib/readline/doc/{history,rlman,rluserman}.texi
+ - change text referring to the copying restrictions to that
+ recommended by the FSF (no Front-Cover Texts and no Back-Cover
+ Texts)
+
+ 3/15
+ ----
+array.c
+ - LASTREF_START: new macro to set the starting position for an array
+ traversal to `lastref' if that's valid, and to the start of the array
+ if not. Used in array_reference, array_insert, array_remove
+ - array_remove: try to be a little smarter with lastref instead of
+ unconditionally invalidating it
+
+ 3/16
+ ----
+array.c
+ - array_insert: fix memory leak by deleting element to be added in the
+ case of an error
+
+ 3/18
+ ----
+lib/sh/mbschr.c
+ - mbschr: don't call mbrlen unless is_basic is false; devolves to a
+ straight character-by-character run through the string
+
+ 3/19
+ ----
+stringlib.c
+ - substring: use memcpy instead of strncpy, since we know the length
+ and are going to add our own NUL terminator
+
+ 3/20
+ ----
+subst.c
+ - parameter_brace_expand_rhs: if expand_string_for_rhs returns a quoted
+ null string (a list with one element for which
+ QUOTED_NULL(list->word->word) returns true), return the quoted null
+ and set the flags in the returned word to indicate it. Fixes bug
+ reported by Mark Edgar <medgar123@gmail.com>
+
+lib/sh/tmpfile.c
+ - use random(3) instead of get_random_number to avoid perturbing the
+ random sequence you get using $RANDOM. Bug report and fix from
+ Jurij Mihelic <jurij.mihelic@fri.uni-lj.si>
+
+ 3/21
+ ----
+config-top.h
+ - OPTIMIZE_SEQUENTIAL_ARRAY_ASSIGNMENT: define to 1 to optimize
+ sequential indexed array assignment patterns. Defined to 1 by
+ default
+
+array.c
+ - array_insert: if OPTIMIZE_SEQUENTIAL_ARRAY_ASSIGNMENT is defined,
+ start the search at lastref (see change from 3/15)
+
+ 3/27
+ ----
+print_cmd.c
+ - debug_print_word_list: new debugging function, prints a word list
+ preceded by an optional string and using a caller-specified
+ separator
+
+ 4/1
+ ---
+command.h
+ - W_ASSNGLOBAL: new flag, set to indicate declare -g
+
+execute_cmd.c
+ - fix_assignment_words: note that we have a -g argument to an assignment
+ builtin and set the W_ASSNGLOBAL flag in the variable word
+
+subst.c
+ - dump_word_flags: print out W_ASSNGLOBAL if present
+ - do_assignment_internal: only set ASS_MKLOCAL if W_ASSIGNARG is set
+ and W_ASSNGLOBAL is not. Don't want to create a local variable even
+ if variable_context is non-zero if ASSNGLOBAL is set. Fixes bug
+ reported by Bill Gradwohl <bill@ycc.com>
+
+ 4/7
+ ---
+lib/readline/readline.c
+ - _rl_dispatch_subseq: make the `keyseq-timeout' variable apply to
+ ESC processing when in vi mode. After hitting ESC, readline will
+ wait up to _rl_keyseq_timeout*1000 microseconds (if set) for
+ additional input before dispatching on the ESC and switching to
+ command/movement mode. Completes timeout work suggested by
+ <rogerx.oss@gmail.com>; this prompted by report from Barry Downes
+ <barry.downes@gmail.com>
+
+lib/sh/shmbchar.c
+ - sh_mbsnlen: new function, returns the number of (possibly multibyte)
+ characters in a passed string with a passed length, examining at most
+ maxlen (third argument) bytes
+
+externs.h
+ - sh_mbsnlen: extern declaration for new function
+
+shell.c
+ - exit_shell: call maybe_save_shell_history if remember_on_history is
+ set, not just in interactive shells. That means the history is
+ saved if history is enabled, regardless of whether or not the shell
+ is interactive
+
+doc/{bash.1,bashref.texi}
+ - TMOUT: fix description to make it explicit that TMOUT is the timeout
+ period for a complete line of input, not just any input. Fixes
+ problem reported in Ubuntu bug 957303:
+ https://bugs.launchpad.net/ubuntu/+source/bash/+bug/957303
+ - HISTFILE: document change to write history list to history file in
+ any shell with history enabled, not just interactive shells. This
+ seems to be more logical behavior. Suggested by Greg Wooledge
+ <wooledg@eeg.ccf.org>
+
+ 4/12
+ ----
+lib/readline/colors.h
+ - only include stdbool.h if HAVE_STDBOOL_H is defined
+ - if HAVE_STDBOOL_H is not defined, provide enough definition for the
+ library to use `bool', `true', and `false'
+
+lib/readline/parse-colors.[ch]
+ - don't try to include <stdbool.h> at all; rely on colors.h to do it
+
+lib/sh/snprintf.c
+ - vsnprintf_internal: only treat '0' as a flag to indicate zero padding
+ if `.' hasn't been encountered ((flags&PF_DOT) == 0); otherwise treat
+ it as the first digit of a precision specifier. Fixes bug reported
+ by Petr Sumbera <petr.sumbera@sun.com>
+
+ 4/15
+ ----
+lib/sh/snprintf.c
+ - vsnprintf_internal: if the '0' and '-' flags both occur, the '0'
+ flag is ignored -- Posix. Start of a series of fixes based on
+ tests and patches from Petr Sumbera <petr.sumbera@sun.com>
+ - PUT_PLUS: make sure PF_PLUS flag is specified before putting the `+'
+ - vsnprintf_internal: when '+' is read as a flag, don't set right-
+ justify flag if the LADJUST (`-') flag has already been supplied
+ - floating: make sure to output space padding before the `+', zero
+ padding after
+ - exponent: make sure to output space padding before the `+', zero
+ padding after
+ - exponent: only subtract one from the width for the decimal point
+ if we're really going to print one
+ - floating: use presence of PF_PLUS flag to decide whether to account
+ for the `+' in the padded field width. Ditto for exponent()
+
+ 4/16
+ ----
+lib/sh/snprintf.c
+ - vsnprint_internal: only reduce precision by 1 when processing the `g'
+ format if it's > 0. A precision of 0 should stay 0; otherwise it
+ gets set to -1 (NOT_FOUND) and converted to the default
+ - number, lnumber: if an explicit precision is supplied, turn off the
+ zero-padding flag and set the pad character back to space
+ - number, lnumber: only account for a `+' when performing the field
+ width calculation if the coversion is base 10; we don't add a `+'
+ for other bases
+
+ 4/18
+ ----
+tests/printf3.sub
+ - try using "perl -e 'print time'" to get the current time in seconds
+ since the epoch if "date +%s" is not available (solaris 8-10)
+
+ 4/19
+ ----
+tests/run-printf
+ - use cat -v instead of relying on diff -a being available to convert
+ control characters to ascii and avoid the dreaded "Binary files
+ /tmp/xx and printf.right differ"
+
+ 4/20
+ ----
+lib/sh/strftime.c
+ - incoporated new version from Aharon Robbins <arnold@skeeve.com>
+
+ 4/22
+ ----
+doc/{bash.1,bashref.texi}
+ - slight change to the description of /dev/tcp and /dev/udp
+
+subst.c
+ - match_wpattern: logic fix to the calculation of `simple' (was |=,
+ needs to be &=). Bug report from Mike Frysinger <vapier@gentoo.org>,
+ fix from Andreas Schwab <schwab@linux-m68k.org>
+
+bashline.c
+ - bash_filename_stat_hook: add code from bash_directory_completion_hook
+ that performs pathname canonicalization in the same way that cd and
+ other builtins will do
+
+ 4/25
+ ----
+execute_cmd.c
+ - execute_pipeline: change the call to move_to_high_fd to make it use
+ getdtablesize() and to not stomp on existing open file descriptors,
+ like the fd the shell is using to read a script. Bug report from
+ Greg Wooledge <wooledg@eeg.ccf.org>
+
+ 5/6
+ ---
+subst.c
+ - expand_word_internal: case '$': after calling param_expand and
+ setting had_quoted_null, set TEMP to null. The code that builds the
+ returned string at the end of the function will take care of making
+ and returning a quoted null string if there's nothing else in
+ ISTRING. If there is, the quoted null should just go away. Part of
+ fix for bug reported by Ruediger Kuhlmann <RKuhlmann@orga-systems.com>
+ - expand_word_internal: when processing ISTRING to build return value,
+ only set W_HASQUOTEDNULL in the returned word flags if the word is
+ a quoted null string AND had_quoted_null is set. Rest of fix
+
+ 5/9
+ ---
+variables.c
+ - bind_variable_internal: if we get an array variable here (implicit
+ assignment to index 0), call make_array_variable_value, which
+ dummies up a fake SHELL_VAR * from array[0]. This matters when
+ we're appending and have to use the current value
+ - bind_variable_internal: after computing the new value, treat assoc
+ variables with higher precedence than simple array variables; it
+ might be that a variable has both attributes set
+
+arrayfunc.c
+ - bind_array_var_internal: break code out that handles creating the
+ new value to be assigned to an array variable index into a new
+ function, make_array_variable_value. This handles creating a
+ dummy SHELL_VAR * for implicit array[0] assignment. Fixes bug
+ reported by Dan Douglas <ormaaj@gmail.com>
+
+arrayfunc.h
+ - make_array_variable_value: new extern declaration
+
+ 5/19
+ ----
+variables.c
+ - bind_int_variable: if an assignment statement like x=y comes in
+ from the expression evaluator, and x is an array, handle it like
+ x[0]=y. Fixes bug reported by Dan Douglas <ormaaj@gmail.com>
+
+ 5/24
+ ----
+
+braces.c
+ - mkseq: handle possible overflow and break the sequence generating
+ loop if it occurs. Fixes OpenSUSE bug 763591:
+ https://bugzilla.novell.com/show_bug.cgi?id=763591
+
+ 5/25
+ ----
+Makefile.in
+ - LDFLAGS_FOR_BUILD: add to compilation recipes for build tools
+ buildversion, mksignames, mksyntax
+ - LDFLAGS_FOR_BUILD: add to compilation recipes for test tools
+ recho, zecho, printenv, xcase
+
+builtins/Makefile.in
+ - LDFLAGS_FOR_BUILD: add to compilation recipes for build tools
+ gen-helpfiles, psize.aux
+
+variables.c
+ - bind_int_variable: if LHS is a simple variable name without an array
+ reference, but resolves to an array variable, call
+ bind_array_variable with index 0 to make x=1 equivalent to x[0]=1.
+ Fixes bug reported by Dan Douglas <ormaaj@gmail.com>
+
+ 5/27
+ ----
+subst.c
+ - expand_word_internal: make sure has_dollar_at doesn't get reset before
+ recursive calls to param_expand or expand_word_internal, since it has
+ to save state of what came before. Use temp variable and make sure
+ has_dollar_at is incremented if recursive call processes "$@".
+ Fixes bug reported by gregrwm <backuppc-users@whitleymott.net> and
+ supplemented by Dan Douglas <ormaaj@gmail.com>
+
+doc/{bash.1,bashref.texi}
+ - changes to the description of substring expansion inspired by
+ suggestions from Bill Gradwohl <bill@ycc.com>
+
+doc/bashref.texi
+ - added substring expansion examples inspired by suggestions from
+ Bill Gradwohl <bill@ycc.com>
+
+variables.c
+ - find_shell_variable: search for a variable in the list of shell
+ contexts, ignore the temporary environment
+ - find_variable_tempenv: search for a variable in the list of shell
+ contexts, force search of the temporary environment
+ - find_variable_notempenv: search for a variable in the list of shell
+ contexts, don't force search of the temporary environment
+
+variables.h
+ - find_shell_variable: extern declaration
+ - find_variable_tempenv: extern declaration
+ - find_variable_notempenv: extern declaration
+
+arrayfunc.c
+ - bind_array_variable: call find_shell_variable instead of calling
+ var_lookup directly
+
+findcmd.c
+ - search_for_command: call find_variable_tempenv instead of
+ find_variable_internal directly
+ - _find_user_command_internal: call find_variable_tempenv instead of
+ find_variable_internal directly
+
+builtins/setattr.def
+ - set_var_attribute: call find_variable_notempenv instead of
+ find_variable_internal directly
+ - show_name_attributes: call find_variable_tempenv instead of
+ find_variable_internal directly
+
+ 6/1
+ ---
+sig.c
+ - termsig_handler: don't try to save the shell history on a terminating
+ signal any more, since it just causes too many problems on Linux
+ systems using glibc and glibc malloc
+
+lib/readline/vi_mode.c
+ - rl_vi_change_to: change to correctly redo `cc', since `c' is not a vi
+ motion character. From Red Hat bug 813289
+ - rl_vi_delete_to: change to correctly redo `dd', since `d' is not a vi
+ motion character
+ - rl_vi_yank_to: change to correctly redo `yy', since `y' is not a vi
+ motion character
+
+ 6/4
+ ---
+lib/sh/mktime.c
+ - current versions of VMS do not need to include <stddef.h>. Fix from
+ John E. Malmberg <wb8tyw@qsl.net>
+
+ 6/5
+ ---
+lib/sh/eaccess.c
+ - sh_stat: instead of using a static buffer to do the DEV_FD_PREFIX
+ translation, use a dynamically-allocated buffer that we keep
+ resizing. Fixes potential security hole reported by David Leverton
+ <levertond@googlemail.com>
+
+ 6/5
+ ---
+braces.c
+ - expand_seqterm: check errno == ERANGE after calling strtoimax for
+ rhs and incr. Part of a set of fixes from Scott McMillan
+ <scotty.mcmillan@gmail.com>
+ - expand_seqterm: incr now of type `intmax_t', which changes
+ arguments to mkseq
+ - mkseq: a better fix for detecting overflow and underflow since it's
+ undefined in C and compilers `optimize' out overflow checks. Uses
+ ADDOVERFLOW and SUBOVERFLOW macros
+ - mkseq: use sh_imaxabs (new macro) instead of abs() for intmax_t
+ variables
+ - mkseq: don't allow incr to be converted to -INTMAX_MIN
+ - mkseq: make sure that strvec_create isn't called with a size argument
+ greater than INT_MAX, since it only takes an int
+
+ 6/6
+ ---
+braces.c
+ - mkseq: try and be smarter about not overallocating elements in
+ the return array if the increment is not 1 or -1
+
+ 6/7
+ ---
+parse.y
+ - history_delimiting_chars: if the parser says we're in the middle of
+ a compound assignment (PST_COMPASSIGN), just return a space to avoid
+ adding a stray semicolon to the history entry. Fixes bug reported
+ by "Davide Brini" <dave_br@gmx.com>
+
+ 6/8
+ ---
+bashline.c
+ - bash_directory_completion_hook: don't attempt spelling correction
+ on the directory name unless the direxpand option is set and we are
+ going to replace the directory name with the corrected one in the
+ readline line. Suggested by Linda Walsh <bash@tlinx.org>
+
+lib/sh/shquote.c
+ - sh_backslash_quote: now takes a third argument: flags. If non-zero,
+ tildes are not backslash-escaped. Have to handle both printf %q,
+ where they should be escaped, and filename completion, where they
+ should not when used as usernames
+
+externs.h
+ - sh_backslash_quote: declaration now takes a third argument
+
+builtins/printf.def
+ - printf_builtin: call sh_backslash_quote with 1 as third argument
+ so tildes get escaped
+
+{bashline,bracecomp}.c
+ - call sh_backslash_quote with 0 as third argument so tildes are not
+ escaped in completed words
+
+doc/bash.1
+ - add `coproc' to the list of reserved words. From a report by
+ Jens Schweikhardt <schweikh@schweikhardt.net>
+
+ 6/10
+ ----
+execute_cmd.c
+ - line_number_for_err_trap: now global, so parse_and_execute can save
+ and restore it with unwind-protect
+
+builtins/evalstring.c
+ - parse_prologue: save and restore line_number_for_err_trap along
+ with line_number
+ - restore_lastcom: new function, unwind-protect to restore
+ the_printed_command_except_trap
+ - parse_prologue: use restore_lastcom to save and restore the value
+ of the_printed_command_except_trap around calls to parse_and_execute
+ (eval/source/.)
+
+ 6/15
+ ----
+lib/readline/complete.c
+ - complete_fncmp: change filename comparison code to understand
+ multibyte characters, even when doing case-sensitive or case-mapping
+ comparisons. Fixes problem reported by Nikolay Shirokovskiy
+ <nshyrokovskiy@gmail.com>
+
+ 6/20
+ ----
+builtins/mapfile.def
+ - mapfile: move the line count increment and check for having read
+ the specified number of lines to the end of the loop to avoid
+ reading an additional line with zgetline. Fixes bug reported by
+ Dan Douglas <ormaaj@gmail.com>
+
+ 6/21
+ ----
+
+execute_cmd.c
+ - execute_pipeline: make sure `lastpipe_flag' is initialized to 0 on
+ all systems, since it's tested later in the function. Fixes bug
+ reported by John E. Malmberg <wb8tyw@qsl.net>
+
+ 6/22
+ ----
+mailcheck.c
+ - file_mod_date_changed: return 0 right away if mailstat() does not
+ return success. Fixes bug with using uninitialized values reported
+ by szymon.kalasz@uj.edu.pl
+
+builtins/set.def
+ - the `monitor' option is not available when the shell is compiled
+ without job control, since the underlying `m' flag is not available
+
+nojobs.c
+ - job_control: now declared as int variable, initialized to 0, never
+ modified
+
+jobs.h
+ - job_control: extern declaration no longer dependent on JOB_CONTROL
+
+execute_cmd.c
+ - execute_pipeline: made necessary changes so `lastpipe' shell option
+ is now available in all shells, even those compiled without
+ JOB_CONTROL defined
+
+ 6/23
+ ----
+lib/glob/glob.c
+ - glob_filename: check for interrupts before returning if glob_vector
+ returns NULL or an error. Bug reported by Serge van den Boom
+ <svdb@stack.nl>, fix from Andreas Schwab <schwab@linux-m68k.org>
+ - call run_pending_traps after each call to QUIT or test of
+ interrupt_state, like we do in mainline shell code
+ - glob_vector: don't call QUIT; in `if (lose)' code block; just free
+ memory, return NULL, and let callers deal with interrupt_state or
+ other signals and traps
+
+ 6/25
+ ----
+lib/readline/input.c
+ - rl_read_key: restructure the loop that calls the event hook a little,
+ so that the hook is called only after rl_gather_tyi returns no input,
+ and any pending input is returned first. This results in better
+ efficiency for processing pending input without calling the hook
+ on every input character as bash-4.1 did. From a report from
+ Max Horn <max@quendi.de>
+
+ 6/26
+ ----
+trap.c
+ - signal_is_pending: return TRUE if SIG argument has been received and
+ a trap is waiting to execute
+
+trap.h
+ - signal_is_pending: extern declaration
+
+lib/glob/glob.c
+ - glob_vector: check for pending SIGINT trap each time through the loop,
+ just like we check for interrupt_state or terminating_signal, and
+ set `lose = 1' so we clean up after ourselves and interrupt the
+ operation before running the trap. This may require a change later,
+ maybe call run_pending_traps and do that if run_pending_traps returns?
+
+variables.c
+ - sv_histtimefmt: set history_comment_character to default (`#') if
+ it's 0 when we're turning on history timestamps. The history code
+ uses the history comment character to prefix timestamps, and
+ leaving it at 0 effectively removes them from the history. From a
+ report to help-bash by Dennis Williamson <dennistwilliamson@gmail.com>
+
+ 6/27
+ ----
+lib/readline/signals.c
+ - rl_maybe_restore_sighandler: new function, sets handler for SIG to
+ HANDLER->sa_handler only if it's not SIG_IGN. Needs to be called
+ on same signals set using rl_maybe_set_sighandler, which does not
+ override an existing SIG_IGN handler (SIGALRM is ok since it does
+ the check inline; doesn't mess with SIGWINCH)
+
+ 6/30
+ ----
+variables.h
+ - additional defines for the new `nameref' variable attribute
+ (att_nameref): nameref_p, nameref_cell, var_setref
+
+variables.c
+ - find_variable_nameref: resolve SHELL_VAR V through chain of namerefs
+ - find_variable_last_nameref: resolve variable NAME until last in a
+ chain of possibly more than one nameref starting at shell_variables
+ - find_global_variable_last_nameref: resolve variable NAME until last
+ in a chain of possibly more than one nameref starting at
+ global_variables
+ - find_nameref_at_context: resolve SHELL_VAR V through chain of namerefs
+ in a specific variable context (usually a local variable hash table)
+ - find_variable_nameref_context: resolve SHELL_VAR V through chain of
+ namerefs following a chain of varible contexts
+ - find_variable_last_nameref_context: resolve SHELL_VAR V as in
+ find_variable_last_context, but return the final nameref instead of
+ what the final nameref resolves to
+ - find_variable_tempenv, find_variable_notempenv, find_global_variable,
+ find_shell_variable, find_variable: modified to follow namerefs
+ - find_global_variable_noref: look up a global variable without following
+ any namerefs
+ - find_variable_noref: look up a shell variable without following any
+ namerefs
+ - bind_variable_internal: modify to follow a chain of namerefs in the
+ global variables table; change to handle assignments to a nameref by
+ following nameref chain
+ - bind_variable: modify to follow chain of namerefs when binding to a
+ local variable
+ - unbind_variable: changes to unset nameref variables (unsets both
+ nameref and variable it resolves to)
+
+subst.c
+ - parameter_brace_expand_word: change to handle expanding nameref whose
+ value is x[n]
+ - parameter_brace_expand_indir: change to expand in ksh93-compatible
+ way if variable to be indirected is nameref and a simple (non-array)
+ expansion
+ - param_expand: change to expand $foo where foo is a nameref whose value
+ is x[n]
+
+execute_cmd.c
+ - execute_for_command: changes to implement ksh93 semantics when index
+ variable is a nameref
+
+builtins/setattr.def
+ - show_var_attributes: change to add `n' to flags list if att_nameref
+ is set
+
+builtins/set.def
+ - unset_builtin: changes to error messages to follow nameref variables
+
+builtins/declare.def
+ - document new -n option
+ - declare_internal: new `-n' and `+n' options
+ - declare_internal: handle declare -n var[=value] and
+ declare +n var[=value] for existing and non-existant variables.
+ Enforce restriction that nameref variables cannot be arrays.
+ Implement semi-peculiar ksh93 semantics for typeset +n ref=value
+
+ 7/5
+ ---
+variables.c
+ - unbind_variable: unset whatever a nameref resolves to, leaving the
+ nameref variable itself alone
+ - unbind_nameref: new function, unsets a nameref variable, not the
+ variable it references
+
+variables.h
+ - unbind_nameref: extern declaration
+
+builtins/set.def
+ - unset_builtin: modify to add -n option, which calls unbind_nameref
+ leaving unbind_variable for the usual case. This required slight
+ changes and additions to the test suite
+
+doc/{bash.1,bashref.texi}
+ - document namerefs and typeset/declare/local/unset -n
+
+ 7/13
+ ----
+lib/sh/casemod.c
+ - include shmbchar.h for is_basic and supporting pieces
+ - sh_casemod: use _to_wupper and _to_wlower to convert wide character
+ case instead of TOUPPER and TOLOWER. Fixes bug reported by
+ Dennis Williamson <dennistwilliamson@gmail.com>, fix from
+ Andreas Schwab <schwab@linux-m68k.org>
+ - cval: short-circuit and return ascii value if is_basic tests true
+ - sh_casemod: short-circuit and use non-multibyte case modification
+ and toggling code if is_basic tests true
+
+lib/readline/signals.c
+ - _rl_{block,release}_sigint: remove the code that actually blocks and
+ releases the signals, since we defer signal handling until calls to
+ RL_CHECK_SIGNALS()
+
+lib/readline/{callback,readline,util}.c
+ - if HAVE_POSIX_SIGSETJMP is defined, use sigsetjmp/siglongjmp without
+ saving and restoring the signal mask instead of setjmp/longjmp
+
+lib/readline/rltty.c
+ - prepare_terminal_settings: don't mess with IXOFF setting if
+ USE_XON_XOFF defined
+
+doc/{bash.1,bashref.texi}
+ - add some text to the description of set -e clarifying its effect
+ on shell functions and shell function execution. Suggested by
+ Rainer Blome <rainer.blome@gmx.de>
+
+bashline.c
+ - edit_and_execute_command: increment current_command_line_count before
+ adding partial line to command history (for command-oriented-history
+ because of rl_newline at beginning of function), then reset it to 0
+ before adding the dummy history entry to make sure the dummy entry
+ doesn't get added to previous incomplete command. Partial fix for
+ problem reported by Peng Yu <pengyu.ut@gmail.com>
+
+ 7/24
+ ----
+configure.in
+ - interix: define RECYCLES_PIDS. Based on a report from Michael
+ Haubenwallner <michael.haubenwallner@salomon.at>
+
+ 7/26
+ ----
+jobs.c
+ - make_child: call bgp_delete on the newly-created pid unconditionally.
+ Some systems reuse pids before cycling through an entire set of
+ CHILD_MAX/_SC_CHILD_MAX unique pids. This is no longer dependent
+ on RECYCLES_PIDS. Based on a report from Michael Haubenwallner
+ <michael.haubenwallner@salomon.at>
+
+support/shobj-conf
+ - Mac OS X: drop MACOSX_DEPLOYMENT_TARGET=10.3 from the LDFLAGS. We
+ can finally kill Panther
+
+ 7/28
+ ----
+subst.c
+ - command_substitute: make sure last_made_pid gets reset if make_child
+ fails
+
+execute_cmd.c
+ - execute_command_internal: case cm_simple: decide whether or not to
+ wait_for a child if already_making_children is non-zero, indicates
+ that there is an unwaited-for child. More of fix for bug report
+ from Michael Haubenwallner <michael.haubenwallner@salomon.at>
+
+jobs.c
+ - make_child: call delete_old_job (new_pid) unconditionally, don't
+ bother to check whether or not pid wrap occurred. Rest of fix for
+ bug report from Michael Haubenwallner
+ <michael.haubenwallner@salomon.at>
+
+ 7/29
+ ----
+shell.c
+ - subshell_exit: new function, exits the shell (via call to sh_exit())
+ after calling any defined exit trap
+
+externs.h
+ - subshell_exit: new extern declaration
+
+execute_cmd.c
+ - execute_command_internal: make sure to call subshell_exit for
+ {} group commands executed asynchronously (&). Part of fix for
+ EXIT trap bug reported by Maarten Billemont <lhunath@lyndir.com>
+
+sig.c
+ - reset_terminating_signals: make sure to set termsigs_initialized back
+ to 0, so a subsequent call to initialize_terminating_signals works
+ right. Rest of fix for bug reported by Maarten Billemont
+ <lhunath@lyndir.com>
+
+{execute_cmd,general,jobs,mailcheck,mksyntax,test}.c
+builtins/{cd,fc,pushd,ulimit}.def
+lib/malloc/getpagesize.h
+lib/sh/{clktck,fpurge,inet_aton,mailstat,oslib,pathcanon,pathphys,spell,strerror}.c
+ - make inclusion of <sys/param.h> dependent on HAVE_SYS_PARAM_H
+ consistently
+
+ 8/6
+ ---
+lib/readline/histexpand.c
+ - history_expand_internal: now takes an additional argument saying
+ whether the history expansion occurs within a quoted string, set to
+ the open quote character
+ - history_expand_internal: use new argument instead of checking prev
+ char and initializing quoted_search_delimiter, pass qc directly to
+ get_history_event, where it allows a matching quote to terminate a
+ string defining an event
+ - history_expand: change single-quote handling code so that if
+ history_quotes_inhibit_expansion is 0, single quotes are treated
+ like double quotes
+ - history_expand: change call to history_expand_internal to pass new
+ argument of `"' if double-quoted string, `'' if single-quoted string;
+ this lets history_expand decide what is a quoted string and what
+ is not
+
+ 8/7
+ ---
+configure.in
+ - AC_CANONICAL_BUILD: invoke for later use
+
+lib/readline/macro.c
+ - _rl_prev_macro_key: new function, inverse of _rl_next_macro_key:
+ backs up the index into the current macro by 1
+
+lib/readline/rlprivate.h
+ - _rl_prev_macro_key: extern declaration
+
+
+lib/readline/readline.c
+ - _rl_dispatch_subseq, _rl_subseq_result: don't call _rl_unget_char
+ if we're currently reading from a macro; call _rl_prev_macro_key
+ instead. Fixes bug reported by Clark Wang <clark.wang@oracle.com>
+
+ 8/13
+ ----
+builtins/evalstring.c
+ - evalstring(): new function, wrapper around parse_and_execute.
+ make sure we handle cases where parse_and_execute can call `return'
+ and short-circuit without cleaning up properly. We call
+ parse_and_execute_cleanup() then jump to the previous-saved return
+ location
+
+builtins/common.h
+ - extern declaration for evalstring()
+
+builtins/eval.def
+ - eval_builtin: make sure we handle `eval " ... return"' in contexts
+ where `return' is valid by calling evalstring(). Fixes bug with
+ `eval return' in sourced files reported by Clark Wang
+ <dearvoid@gmail.com>
+
+trap.c
+ - run_pending_traps: call evalstring instead of parse_and_execute.
+ XXX - still needs to handle saving and restoring token state in the
+ presence of `return'; could use unwind_protects for that
+
+builtins/mapfile.def
+ - run_callback: call evalstring instead of parse_and_execute
+
+ 8/15
+ ----
+bashline.c
+ - bash_filename_stat_hook: make sure we don't free local_dirname
+ before using it to canonicalize any expanded filename. Make sure
+ it always points to *dirname and only free it if we're replacing
+ it.
+
+lib/readline/complete.c
+ - append_to_match: make sure we call rl_filename_stat_hook with
+ newly-allocated memory to avoid problems with freeing it twice
+
+ 8/17
+ ----
+variables.c,config-top.h
+ - if ARRAY_EXPORT is defined to 1 when variables.c is compiled, the
+ code that allows indexed arrays to be exported is enabled and
+ included
+
+ 8/19
+ ----
+shell.c
+ - call start_debugger from main() only if dollar_vars[1] != 0 (close
+ enough to a non-interactive shell, since we can be interactive with
+ -i while running a shell script). Fixes oddity reported by
+ Techlive Zheng <techlivezheng@gmail.com>
+
+ 8/20
+ ----
+arrayfunc.c
+ - quote_array_assignment_chars: don't bother quoting if the word has
+ not been marked as an assignment (W_ASSIGNMENT)
+ - quote_array_assignment_chars: turn on W_NOGLOB in the word flags
+ so assignment statements don't undergo globbing. Partial fix for
+ problems reported by Dan Douglas <ormaaj@gmail.com>
+
+ 8/21
+ ----
+command.h
+ - W_NOBRACE: new word flag that means to inhibit brace expansion
+
+subst.c
+ - brace_expand_word_list: suppress brace expansion for words with
+ W_NOBRACE flag
+
+ 8/22
+ ----
+builtins/read.def
+ - read_builtin: don't call dequote_string on what we've read, even if
+ we saw an escape character, unless (input_string && *input_string).
+ We may have escaped an IFS whitespace character. Fixes seg fault
+ reported by <armandsl@gmail.com>
+
+execute_cmd.c
+ - execute_command_internal: set the_printed_command_except trap when
+ about to execute a ( ... ) user subshell. For now, set it only if
+ ERR is trapped; can relax that later. Fixes bug reported by
+ Mike Frysinger <vapier@gentoo.org>
+
+ 8/23
+ ----
+jobs.c
+ - remove references to first_pid and pid_wrap, since we're not using
+ them for anything anymore
+
+ 8/24
+ ----
+subst.c
+ - changes for W_NOBRACE everywhere appropriate: so it can be displayed
+ for debugging, and passed out of expand_word_internal
+
+doc/{bash.1,bashref.texi}
+ - small changes to make it clearer that the = and == operators are
+ equivalent, and will cause pattern matching when used with [[.
+ From a question from Michal Soltys <soltys@ziu.info>
+
+doc/bashref.texi
+ - some small formatting changes from Karl Berry <karl@freefriends.org>
+
+ 8/27
+ ----
+lib/readline/doc/{history,rlman,rluserman}.texi
+ - some small formatting changes from Karl Berry <karl@freefriends.org>
+
+arrayfunc.c
+ - assign_array_element_internal, assign_compound_array_list,
+ unbind_array_element, array_value_internal: changes to make
+ assignment statements to negative indices (a[-1]=2) and unsetting
+ array elements using negative indices (unset 'a[-1]') work.
+ From suggestions by Dennis Williamson <dennistwilliamson@gmail.com>
+ and Chris F. A. Johnson <chris@cfajohnson.com>
+
+subst.c
+ - array_length_reference: changes to make length references to array
+ elements using negative indices (${#a[-1]}) work
+
+ 8/28
+ ----
+doc/{bash.1,bashref.texi}
+ - document new treatment of negative indices to indexed arrays when
+ assigning, referencing, calculating length, and unsetting
+
+ 8/29
+ ----
+shell.c
+ - show_shell_usage: add -l to list of shell invocation options (short
+ for --login). From Red Hat bug 852469
+
+configure.ac
+ - renamed from configure.in, as latest autoconf versions want. Patches
+ Stefano Lattarini <stefano.lattarini@gmail.com>
+
+MANIFEST,Makefile.in,doc/bashref.texi,support/mkconffiles
+ - configure.in -> configure.ac
+
+ 9/1
+ ---
+
+parse.y
+ - read_token_word: allow words like {array[ind]} to be valid redirection
+ words for constructs like {x}<file
+
+redir.c
+ - redir_varassign: bind_var_to_int already handles array assignments,
+ so don't need to do anything more for things like {a[i]}<file
+ - redir_varvalue: changes to allow references to {a[i]} when
+ performing redirections using valid_array_reference and
+ get_array_value. Adds functionality requested most recently by
+ <unknown@vmw-les.eng.vmware.com>
+
+lib/readline/display.c
+ - update_line: if the first difference between the old and new lines
+ is completely before any invisible characters in the prompt, we
+ should not adjust _rl_last_c_pos, since it's before any invisible
+ characters. Fixed in two places
+ - prompt_modechar: return a character indicating the editing mode:
+ emacs (@), vi command (:), or vi insert (+)
+ - _rl_reset_prompt: new function, just calls rl_expand_prompt. Will be
+ inlined, placeholder for more changes
+ - expand_prompt: if show-mode-in-prompt is enabled, add a character to
+ the front of the prompt indicating the editing mode, adjusting the
+ various variables as appropriate to keep track of the number of
+ visible characters and number of screen positions
+
+lib/readline/bind.c
+ - show-mode-in-prompt: new bindable boolean variable, shadowed by
+ _rl_show_mode_in_prompt variable
+ - hack_special_boolean_var: call _rl_reset_prompt when toggling or
+ setting show-mode-in-prompt
+
+lib/readline/readline.c
+ - readline_internal_setup: make sure the correct vi mode keymap is set
+ before expanding the prompt string for the first time
+
+lib/readline/misc.c
+ - rl_emacs_editing_mode: make sure to call _rl_reset_prompt if we're
+ showing the editing mode in the prompt
+
+lib/readline/rlprivate.h
+ - _rl_reset_prompt, _rl_show_mode_in_prompt: extern declarations
+
+lib/readline/vi_mode.c
+ - rl_vi_insertion_mode: call _rl_reset_prompt
+ - rl_vi_movement_mode: call _rl_reset_prompt. Finishes changes for
+ showing mode in prompt string, originally requested by Miroslav
+ Koskar <mkoskar@gmail.com> and most recently by Jordan Michael
+ Ziegler <jziegler@bnl.gov>
+
+doc/bash.1,lib/readline/doc/{readline.3,rluser.texi}
+ - document new show-mode-in-prompt variable, off by default
+
+ 9/3
+ ---
+
+jobs.c
+ - set_childmax: new function, external mechanism for other parts of
+ the shell to set js.c_childmax, the number of saved exited child
+ statuses to remember
+jobs.h
+ - set_childmax: extern declaration
+
+variables.c
+ - CHILD_MAX: new special variable, with sv_childmax function to
+ run when it changes. Setting CHILD_MAX to a value greater than
+ zero but less than some maximum (currently 8192) sets the number of
+ exited child statuses to remember. set_childmax (jobs.c) ensures
+ that the number does not drop below the posix-mandated minimum
+ (CHILD_MAX)
+
+doc/{bash.1,bashref.texi}
+ - CHILD_MAX: document new meaning and action when variable is set
+
+ 9/5
+ ---
+redir.c
+ - redir_varassign: call stupidly_hack_special_variables after
+ assigning fd number to specified variable, so we can use constructs
+ like {BASH_XTRACEFD}>foo. Suggested by Pierre Gaston
+ <pierre.gaston@gmail.com>
+
+ 9/8
+ ---
+expr.c
+ - readtok: invalidate previous contents of `curlval' before freeing
+ and reallocating tokstr (which, chances are, will get the same
+ pointer as before and render curlval inconsistent). Fixes other
+ bug reported by Dan Douglas <ormaaj@gmail.com>
+
+ 9/9
+ ---
+lib/readline/complete.c
+ - rl_username_completion_function: protect call to setpwent() with
+ #ifdef (HAVE_GETPWENT)/#endif. Fixes bug reported by
+ Gerd Hofmann <gerd.hofmann.nbg@googlemail.com>
+
+lib/readline/display.c
+ - rl_message: second and subsequent calls to rl_message can result in
+ local_prompt being overwritten with new values (e.g., from the
+ successive calls displaying the incremental search string). Need
+ to free before overwriting if it's not the same as the value saved
+ in saved_local_prompt. Fixes memory leak reported by
+ Wouter Vermaelen <vermaelen.wouter@gmail.com>
+
+lib/readline/{terminal.c,rlprivate.h}
+ - move CUSTOM_REDISPLAY_FUNC and CUSTOM_INPUT_FUNC defines from
+ terminal.c to rlprivate.h so other files can use them
+
+expr.c
+ - expr_streval: if noeval is non-zero, just return 0 right away,
+ short-circuiting evaluation completely. readtok will leave curtok
+ set correctly without re-entering the evaluator at all. Rest of
+ fix for bug reported by Dan Douglas <ormaaj@gmail.com>
+
+ 9/11
+ ----
+
+parse.y
+ - parse_comsub: make sure the `reserved word ok in this context' flag
+ is preserved after we read `do' followed by whitespace. Fixes bug
+ reported by Benoit Vaugon <benoit.vaugon@gmail.com>
+
+ 9/13
+ ----
+configure.ac,config.h.in
+ - enable-direxpand-default: new configure option, turns the `direxpand'
+ shell option on by default
+
+bashline.c
+ - dircomplete_expand, dircomplete_expand_relpath: initialize to 1 if
+ DIRCOMPLETE_EXPAND_DEFAULT is defined and non-zero
+
+doc/bashref.texi
+ - enable-direxpand-default: document new configure option
+
+ 9/14
+ ----
+shell.c
+ - --protected: make option valid only when wordexp is compiled into
+ the shell. Fix from Roman Rakus <rrakus@redhat.com>
+
+configure.ac
+ - HP NonStop (*-nsk*): compile --without-bash-malloc. Change from
+ Joachim Schmitz <jojo@schmitz-digital.de>
+
+ 9/16
+ ----
+subst.c,execute_cmd.c,lib/glob/sm_loop.c,lib/sh/shquote.c
+ - minor code cleanups from Joachim Schmitz <jojo@schmitz-digital.de>
+
+lib/readline/colors.h
+ - workaround for HP NonStop compiler issue with <stdbool.h> from
+ Joachim Schmitz <jojo@schmitz-digital.de>
+
+ 9/17
+ ----
+builtins/printf.def
+ - printf_builtin: handle localtime returning NULL, as can happen when
+ encountering overflow. Bug report and initial fix from
+ Eduardo A. Bustamante López <dualbus@gmail.com>
+
+doc/{bash.1,bashref.texi}
+ - emphasize that brace expansion using character ranges ({a..c}) acts
+ as if the C locale were in use. Prompted by message from
+ Marcel Giannelia <info@skeena.net>
+
+ 9/20
+ ----
+lib/sh/wcsnwidth.c
+ - wcsnwidth: new function, variant of wcwidth, returns the number of
+ wide characters from a string that will be displayed to not exceed
+ a specified max column position
+
+ 9/21
+ ----
+builtins/help.def
+ - show_builtin_command_help: break code that displays the short-doc
+ for each builtin in two columns into a new function: dispcolumn
+ - wdispcolumn: multibyte-char version of dispcolumn; uses wide
+ chars and printf "%ls" format. Fixes problem reported by
+ Nguyá»n Thái Ngá»c Duy <pclouds@gmail.com>
+
+ 9/22
+ ----
+execute_cmd.c
+ - execute_disk_command: before running the command-not-found hook,
+ call kill_current_pipeline() to make sure we don't add processes
+ to an existing pipeline or wait for processes erroneously
+
+ 9/23
+ ----
+lib/readline/input.c
+ - rl_input_available_hook: new hook function, called from
+ _rl_input_available (or _rl_input_queued) to return whether or not
+ input is available wherever the input source is
+
+lib/readline/doc/rltech.texi
+ - rl_input_available_hook: document
+
+ 9/27
+ ----
+lib/glob/sm_loop.c:
+ - GMATCH: after one or more `*', an instance of ?(x) can match zero or
+ 1 times (unlike ?, which has to match one character). The old code
+ failed if it didn't match at least once. Fixes `a*?(x)' bug.
+ - GMATCH: if we hit the end of the search string, but not the end of
+ the pattern, and the rest of the pattern is something that can
+ match the NUL at the end of the search string, we should successfully
+ match. Fixes `a*!(x)' bug reported by <hans1worst@gmail.com>
+
+ 10/2
+ ----
+command.h
+ - add c_lock member to coproc structure for future use to tell who is
+ manipulating it
+
+execute_cmd.c
+ - execute_coproc: block SIGCHLD while parent is forking coproc
+ process and adding pid to sh_coproc struct to avoid race condition
+ where child is reaped before the pid is assigned and the coproc is
+ never marked as having died. Fixes race condition identified by
+ Davide Baldini <baldiniebaldini@gmail.com>
+ - add assignments to c_lock member of struct coproc in various
+ functions that manipulate it; was used to identify race condition
+ - coproc_pidchk: don't call coproc_dispose to avoid using malloc and
+ other functions in a signal handler context
+ - coproc_dispose: call BLOCK_SIGNAL/UNBLOCK_SIGNAL for SIGCHLD while
+ manipulating the sh_coproc struct
+
+ 10/6
+ ----
+lib/readline/complete.c
+ - rl_display_match_list: if printing completions horizontally, don't
+ bother with spacing calculations if limit == 1, which means we are
+ printing one completion per line no matter what. Fixes bug
+ reported by David Kaasen <kaasen@nvg.ntnu.no>
+
+ 10/7
+ ----
+builtins/declare.def
+ - declare_internal: add error checking for nameref attribute and
+ variable assignments: self-references, attempts to make an array
+ variable a nameref
+
+subst.c
+ - parameter_brace_expand: handle parameter_brace_expand_word returning
+ &expand_param_fatal or &expand_param_error and return the appropriate
+ error value
+ - parameter_brace_expand_word: if a nameref variable's value is not a
+ valid identifier, return an error
+ - param_expand: if a nameref variable's value is not a valid identifier,
+ return an error
+
+test.c
+ - unary_operator: add new -R variable, returns true if variable is set
+ and has the nameref attribute. From ksh93
+
+builtins/test.def
+ - add -R to description of conditional commands for help test
+
+doc/{bash.1,bashref.texi}
+ - document new -R unary conditional operator
+
+ 10/13
+ -----
+trap.c
+ - check_signals_and_traps: new function, convenience function for the
+ rest of the shell to check for pending terminating and interrupt
+ signals, and to check for and process any pending traps
+ - any_signals_trapped: new function, returns non-zero if any signals
+ are trapped and -1 if not
+
+trap.h
+ - extern declaration for check_signals_and_traps
+
+bashline.c
+ - bashline_reset: make sure we reset the event hook
+ - bash_event_hook: call check_signals_and_traps instead of just
+ checking for terminating signals so we can run pending traps and
+ react to interrupts, and reset the event hook when we're done
+
+
+ 10/14
+ -----
+trap.c
+ - trap_handler: if executing in a readline signal handler context,
+ call bashline_set_event_hook to install bash_event_hook to process
+ the signal (if bash cares about it)
+
+sig.c
+ - sigint_sighandler: call bashline_set_event_hook to set the event
+ hook if we're executing in a readline signal handler context
+
+lib/readline/input.c
+ - rl_getc: call RL_CHECK_SIGNALS if read returns -1/EINTR and the caught
+ signal is SIGINT or SIGQUIT rather than waiting until the next time
+ around the loop
+ - rl_getc: call rl_event_hook after calling RL_CHECK_SIGNALS to allow
+ an application signal handler to set the event hook in its own
+ signal handler (e.g., like bash trap_handler or sigint_sighandler)
+
+
+parse.y
+ - yy_readline_get: don't set interrupt_immediately before we call
+ readline(). Inspired by report from lanshun zhou
+ <zls.sogou@gmail.com>
+
+input.c
+ - getc_with_restart: add call to run_pending_traps after call to
+ CHECK_TERMSIG
+
+lib/sh/zread.c
+ - zread: call check_signals_and_traps if read() returns -1/EINTR
+ instead of just ignoring the EINTR and deferring handling any
+ signal that generated it
+
+builtins/mapfile.def
+ - mapfile: don't set interrupt_immediately before calling zgetline()
+ (which uses zread internally)
+
+builtins/read.def
+ - read_builtin: don't set interrupt_immediately before calling zread
+ (moved code around so that it was only being set right around calls
+ to zread to avoid signal handler conflicts). Inspired by report
+ from lanshun zhou <zls.sogou@gmail.com>
+ - edit_line: don't set interrupt_immediately around call to readline()
+ - include shmbutil.h
+ - read_builtin: don't call read_mbchar unless is_basic(c) returns
+ false for the character we just read
+
+ 10/15
+ -----
+sig.c
+ - throw_to_top_level: if interrupt_state is non-zero, make sure that
+ last_command_exit_value reflects 128+SIGINT if it's not already
+ greater than 128
+
+ 10/20
+ -----
+builtins/wait.def
+ - WAIT_RETURN: set wait_signal_received back to 0 for the potential
+ next call to wait
+
+quit.h
+ - CHECK_WAIT_INTR: macro to check whether trap_handler handled a
+ signal and set wait_signal_received; longjmp to wait_intr_buf in
+ that case
+
+jobs.c
+ - wait_for, waitchld: call CHECK_WAIT_INTR at the same places we call
+ CHECK_TERMSIG to check for terminating signals
+ - wait_sigint_handler: don't longjmp out of the wait builtin unless
+ interrupt_immediately is set; otherwise just SIGRETURN from the
+ handler
+ - wait_sigint_handler: if interrupt_immediately not set, but we are
+ executing in the wait builtin and SIGINT is not trapped, treat it
+ as a `normally received' SIGINT: restore the signal handler and
+ send SIGINT to ourselves
+ - waitchld: when in posix mode and running SIGCHLD traps, don't longjmp
+ to wait_intr_buf (and let wait be interrupted) if we're running from
+ a signal handler. Wait for CHECK_WAIT_INTR to do the longjmp.
+ run_pending_traps will run the SIGCHLD trap later
+
+nojobs.c
+ - reap_zombie_children, wait_for_single_pid, wait_for: call
+ CHECK_WAIT_INTR where we call CHECK_TERMSIG
+ - wait_sigint_handler: don't longjmp out of the wait builtin unless
+ interrupt_immediately is set; otherwise just SIGRETURN from the
+ handler
+
+trap.c
+ - trap_handler: make sure wait_signal_received is set if the wait
+ builtin is executing, and only longjmp if interrupt_immediately is
+ set. This whole set of fixes was prompted by report from
+ lanshun zhou <zls.sogou@gmail.com>
+
+ 10/24
+ -----
+lib/glob/glob.c
+ - glob_filename: only check directory_name for globbing chars if
+ it's of non-zero length
+
+lib/sh/strchrnul.c
+ - new simpler implementation
+
+subst.c
+ - command_substitute: call set_shellopts after turning off errexit
+ in subshells so it's reflected in $SHELLOPTS
+
+ 11/7
+ ----
+builtins/evalstring.c
+ - parse_and_execute: treat ERREXIT case like reader_loop does: set
+ variable_context to 0 before longjmping back to top_level. Don't
+ run the unwind-protect context to avoid side effects from popping
+ function contexts. Part of fix for problem reported by Nikolai
+ Kondrashov <nikolai.kondrashov@redhat.com>
+
+execute_cmd.c
+ - execute_simple_command: call unlink_fifo_list only if this is the
+ last element of a pipeline (or not in a pipeline), rather than for
+ every child. Fixes difference in behavior between /dev/fd and
+ FIFOs reported by Zev Weiss <zev@bewilderbeest.net>
+ - execute_null_command: do the same thing in the parent branch after
+ make_child
+
+ 11/14
+ -----
+subst.c
+ - parameter_brace_expand: a variable is null if it's special ($@, $*),
+ the expansion occurs within double quotes, and the expansion turns
+ into a quoted null. Fixes debian bug 692447 reported by
+ Matrosov Dmitriy <sgf.dma@gmail.com>
+
+jobs.c
+ - run_sigchld_trap: make sure `running_trap' sentinel is set
+ appropriately
+ - waitchld: only run the sigchld trap if we're not in a signal
+ handler, not running a trap, and executing the wait builtin.
+ Otherwise, queue for later handling. We still run one instance
+ of the trap handler per exited child. Bulk of fix for bug
+ reported by Elliott Forney <idfah@cs.colostate.edu>
+
+trap.c
+ - queue_sigchld_trap: set catch_flag so run_pending_traps notices,
+ and set trapped_signal_received for completeness. Rest of fix
+ for bug reported by Elliott Forney <idfah@cs.colostate.edu>
+
+lib/malloc/malloc.c
+ - block_signals: renamed to _malloc_block_signals, made public
+ - unblock_signals: renamed to _malloc_unblock_signals, made public
+
+lib/malloc/imalloc.h
+ - extern declarations for _malloc_{un,}block_signals
+
+lib/malloc/table.c
+ - mregister_alloc, mregister_free: block signals around table
+ manipulation
+
+ 11/15
+ -----
+trap.c
+ - run_pending_traps: set SIG_INPROGRESS flag around calls to
+ run_sigchld_handler so other parts of the shell know that the
+ SIGCHLD trap handler is executing
+ - run_pending_traps: if we get a situation where we are looking at
+ running a SIGCHLD trap but the trap string is IMPOSSIBLE_TRAP_HANDLER
+ and the SIG_INPROGRESS flag is set, just skip it. This is possible
+ if run_pending_traps is called from a SIGCHLD trap handler run by
+ run_sigchld_trap
+
+doc/bash.1,lib/readline/doc/{rluser.texi,readline.3}
+ - corrected description of the effect of `set history-size 0'. Report
+ from Vesa-Matti J Kari <vmkari@cc.helsinki.fi>
+
+include/stdc.h
+ - CPP_STRING: new define, replaces __STRING
+
+lib/malloc/{malloc.c,imalloc.h}
+ - replace __STRING with CPP_STRING
+
+ 11/16
+ -----
+lib/readline/bind.c
+ - sv_histsize: if argument evaluates to a value < 0, unstifle the
+ history
+
+ 11/22
+ -----
+redir.c
+ - do_redirection_internal: if we have REDIR_VARASSIGN set in the
+ redirection flags and we set up `redirector' using fcntl or dup2,
+ don't add a redirect to make sure it stays open. Let the
+ script programmer manage the file handle. Fixes bug reported by
+ Sam Liddicott <sam@liddicott.com>
+
+ 11/24
+ -----
+jobs.c
+ - wait_for_any_job: new function, waits for an unspecified background
+ job to exit and returns its exit status. Returns -1 on no background
+ jobs or no children or other errors. Calls wait_for with new
+ sentinel value ANY_PID
+ - wait_for: changes to handle argument of ANY_PID: don't look up or
+ try to modify the child struct, only go through the wait loop once.
+ Return -1 if waitpid returns no children
+
+jobs.h
+ - ANY_PID: new define
+
+builtins/wait.def
+ - new option: -n. Means to wait for the next job and return its exit
+ status. Returns 127 if there are no background jobs (or no
+ children). Feature most recently requested by Elliott Forney
+ <idfah@cs.colostate.edu>
+
+doc/{bash.1,bashref.texi}
+ - document new `wait -n' option
+
+execute_cmd.c
+ - execute_command_internal: save make_command_string () result in a
+ temp variable before calling savestring() on it; avoids evaluating
+ make_command_string() result twice. Fix from John E. Malmberg
+ <wb8tyw@qsl.net>
+
+ 11/28
+ -----
+
+builtins/declare.def
+ - declare_internal: if an array variable is declared using `declare -a'
+ or `declare -A', but not assigned a value, set the `invisible'
+ attribute so the variable does not show up as set. Fix for bug
+ about variable initialization reported by Tim Friske <me@timfriske.com>
+
+builtins/{mapfile,read}.def
+ - after calling find_or_make_array_variable, make sure the invisible
+ flag is turned off, in case the variable was declared previously
+ using `declare -a' or `declare -A'. Side effect of above change to
+ declare_internal
+
+subst.c
+ - shell_expand_word_list: handle the W_ASSNGLOBAL flag and put -g into
+ the list of options passed to make_internal_declare as appropriate.
+ Fix for bug reported by Tim Friske <me@timfriske.com>
+
+ 11/30
+ -----
+test.c
+ - unary_op: make sure -v and -n check that the variable is not marked
+ as invisible before calling var_isset. Fix for bug reported by Tim
+ Friske <me@timfriske.com>
+
+ 12/2
+ ----
+subst.c
+ - process_substitute: turn off the `expanding_redir' flag, which
+ controls whether or not variables.c:find_variable_internal uses the
+ temporary environment to find variables. We want to use the
+ temp environment, since we don't have to worry about order of
+ evaluation in a subshell. Fixes bug reported by Andrey Borzenkov
+ <arvidjaar@gmail.com>
+
+ 12/4
+ ----
+lib/glob/glob.c
+ - glob_filename: changes to avoid null filenames and multiple entries
+ returned for patterns like **/** (globstar enabled). Fixes bug
+ reported by Ulf Magnusson <ulfalizer@gmail.com>
+
+ 12/10
+ -----
+lib/glob/glob.c
+ - glob_filename: finish up a series of changes to make globstar-style
+ globbing more efficient, avoid more duplicate filenames, and be more
+ compatible with other shells that implement it
+ o collapse a sequence of **/**/** to one **
+ o note when the directory name is all ** or ends in ** so we
+ can treat it specially when the filename is **
+ All inspired by report from Andrey Borzenkov <arvidjaar@gmail.com>
+
+lib/sh/zread.c
+ - zreadn: new function, like zread, but takes an additional argument
+ saying how many bytes to read into the local buffer. Can be used to
+ implement `read -N' without so many one-byte calls to zreadc. Code
+ from Mike Frysinger <vapier@gentoo.org>
+
+ 12/12
+ -----
+lib/glob/sm_loop.c
+ - PATSCAN (glob_patscan): if passed string already points to end of
+ pattern, return NULL immediately. Fixes problem with
+ extglob_skipname reported by Raphaël Droz <raphael.droz@gmail.com>
+
+ 12/13
+ -----
+execute_cmd.c
+ - execute_coproc: handle the command's exit status being inverted
+ (an oversight). Fixes bug reported by DJ Mills
+ <danielmills1@gmail.com> and Andreas Schwab <schwab@linux-m68k.org>
+
+ 12/14
+ -----
+lib/readline/readline.c
+ - bind_arrow_keys_internal: add MINGW key bindings for Home, End,
+ Delete, and Insert keys. Fix from Pierre Muller
+ <pierre.muller@ics-cnrs.unistra.fr>
+
+builtins/printf.def
+ - printf_builtin: '%()T' conversion: if there is no argument supplied,
+ behave as if -1 had been supplied (current time). ksh93-like feature
+ suggested by Clark Wang <dearvoid@gmail.com>
+
+doc/{bash.1,bashref.texi}
+ - document new printf %()T default argument behavior
+
+ 12/15
+ -----
+lib/readline/display.c
+ - displaying_prompt_first_line: new variable, indicates whether or
+ not the first line of output is displaying the prompt. Always true
+ in normal mode, sometimes false in horizontal scrolling mode
+ - rl_redisplay: set displaying_prompt_first_line to true unless we
+ are in horizontal mode; set to false in horizontal mode if the left
+ margin of the displayed line is greater than the end of the prompt
+ string
+ - rl_redisplay: when in horizontal scroll mode, don't adjust
+ _rl_last_c_pos by the wrap offset unless the line is displaying
+ a prompt containing invisible chars
+ - update line: don't adjust _rl_last_c_pos by the wrap offset unless
+ the line is displaying a prompt containing invisible chars
+ - update_line: if shrinking the line by reducing the number of
+ displayed characters, but we have already moved the cursor to the
+ beginning of the line where the first difference starts, don't
+ try to delete characters
+
+builtins/read.def
+ - unbuffered_read: set to 2 if invoked as `read -N'
+ - if unbuffered_read is set to 2, compute the number of chars we
+ need to read and read that many with zreadn. Posix mode still
+ uses zreadintr. Code from Mike Frysinger <vapier@gentoo.org>
+
+doc/{bash.1,bashref.texi}
+ - read: make it clear that if read times out, it saves any input
+ read to that point into the variable arguments. Report from
+ Fiedler Roman <Roman.Fiedler@ait.ac.at>
+
+subst.c
+ - command_substitute: change direct assignment of exit_immediately_on_error
+ to use change_flag ('e', FLAG_OFF) instead
+
+flags.c
+ - use errexit_flag as the variable modified by changes to the -e
+ option, reflect those changes to exit_immediately_on_error
+
+execute_cmd.c
+ - execute_builtin: new global variable, builtin_ignoring_errexit, set
+ to 0 by default and set to 1 if eval/source/command executing in a
+ context where -e should be ignored
+ - execute_builtin: set exit_immediately_on_error to errextit_flag
+ after executing eval/source/command in a context where -e should
+ be ignored
+
+flags.c
+ - if builtin_ignoring_errexit is set, changes to errexit_flag are
+ not reflected in the setting of exit_immediately_on_error. Fixes
+ bug reported by Robert Schiele <rschiele@gmail.com>
+
+ 12/23
+ -----
+include/posixjmp.h
+ - setjmp_nosigs: new define, call setjmp in such a way that it will
+ not manipulate the signal mask
+
+{expr,test,trap}.c
+ - setjmp_nosigs: call instead of setjmp; don't need to manipulate
+ signal mask
+
+builtins/read.def
+ - read_builtin: setjmp_nosigs: call instead of setjmp; don't need
+ to manipulate signal mask
+
+builtins/evalstring.c:
+ - parse_and_execute: setjmp_nosigs: call instead of setjmp; don't need
+ to manipulate signal mask
+ - parse_string: setjmp_nosigs: call instead of setjmp; don't need
+ to manipulate signal mask
+ - parse_and_execute: save and restore the signal mask if we get a
+ longjmp that doesn't cause us to return or exit (case DISCARD)
+
+ 12/24
+ -----
+general.c
+ - bash_tilde_expand: only set interrupt_immediately if there are no
+ signals trapped; we want to jump to top level if interrupted but
+ not run any trap commands
+
+ 12/25
+ -----
+jobs.c
+ - run_sigchld_trap: no longer set interrupt_immediately before calling
+ parse_and_execute, even if this is no longer run in a signal handler
+ context
+
+input.c
+ - getc_with_restart: add call to QUIT instead of CHECK_TERMSIG
+
+parse.y
+ - yy_stream_get: now that getc_with_restart calls QUIT, don't need to
+ set interrupt_immediately (already had call to run_pending_traps)
+
+execute_cmd.c
+ - execute_subshell_builtin_or_function,execute_function,execute_in_subshell:
+ setjmp_nosigs: call instead of setjmp when saving return_catch; don't
+ need to manipulate signal mask
+ - execute_subshell_builtin_or_function,execute_in_subshell:
+ setjmp_nosigs: call instead of setjmp where appropriate when saving
+ top_level; don't need to manipulate signal mask if we're going to
+ exit right away
+
+subst.c
+ - command_substitute: setjmp_nosigs: call instead of setjmp when saving
+ return_catch; don't need to manipulate signal mask
+ - command_substitute: setjmp_nosigs: call instead of setjmp where
+ appropriate when saving top_level; don't need to manipulate signal
+ mask if we're going to exit right away
+
+trap.c
+ - run_exit_trap: setjmp_nosigs: call instead of setjmp when saving
+ return_catch; don't need to manipulate signal mask
+ - run_exit_trap: setjmp_nosigs: call instead of setjmp where
+ appropriate when saving top_level; don't need to manipulate signal
+ mask if we're going to exit right away
+ - _run_trap_internal: setjmp_nosigs: call instead of setjmp when saving
+ return_catch; don't need to manipulate signal mask
+
+builtins/evalfile.c
+ - _evalfile: setjmp_nosigs: call instead of setjmp when saving
+ return_catch; don't need to manipulate signal mask
+
+builtins/evalstring.c
+ - evalstring: setjmp_nosigs: call instead of setjmp when saving
+ return_catch; don't need to manipulate signal mask
+
+shell.c
+ - main: setjmp_nosigs: call instead of setjmp where appropriate when
+ saving top_level; don't need to manipulate signal mask if we're
+ going to exit right away
+ - run_one_command: setjmp_nosigs: call instead of setjmp where
+ appropriate when saving top_level; don't need to manipulate signal
+ mask if we're going to exit right away
+ - run_wordexp: setjmp_nosigs: call instead of setjmp where
+ appropriate when saving top_level; don't need to manipulate signal
+ mask if we're going to exit right away
+
+eval.c
+ - reader_loop: save and restore the signal mask if we get a longjmp
+ that doesn't cause us to return or exit (case DISCARD)
+
+ 12/26
+ -----
+parse.y
+ - shell_input_line_{index,size,len}: now of type size_t; in some cases
+ the unsigned property makes a difference
+ - STRING_SAVER: saved_line_{size,index} now of type size_t
+ - shell_getc: don't allow shell_input_line to grow larger than SIZE_MAX;
+ lines longer than that are truncated until read sees a newline;
+ addresses theoretical buffer overflow described by Paul Eggert
+ <eggert@cs.ucla.edu>
+ - set_line_mbstate: size_t changes like shell_getc
+ - shell_getc: if shell_input_line is larger than 32K, free it and
+ start over to avoid large memory allocations sticking around
+
+variables.c
+ - bind_global_variable: new function, binds value to a variable in
+ the global shell_variables table
+
+variables.h
+ - bind_global_variable: new extern declaration
+
+builtins/declare.def
+ - declare_internal: if -g given with name=value, but variable is not
+ found in the global variable table, make sure to call
+ bind_global_variable so the variable is created and modified at
+ global scope. Fixes a bug where declare -g x=y could modify `x'
+ at a previous function scope
+
+command.h
+ - W_ASSIGNARRAY: new word flag, compound indexed array assignment
+
+subst.h
+ - ASS_MKGLOBAL: new assignment flag, forcing global assignment even in
+ a function context, used by declare -g
+
+execute_cmd.c
+ - fix_assignment_words: set W_ASSIGNARRAY flag if -a option given to
+ declaration builtin
+
+subst.c
+ - do_assignment_internal: explicitly handle case where we are
+ executing in a function and we want to create a global array or
+ assoc variable
+ - shell_expand_word_list: call make_internal_declare if -a option
+ given to declaration builtin (W_ASSIGNARRAY); handle -g option with
+ it (W_ASSNGLOBAL). Fixes inconsistency noticed by Vicente Couce
+ Diaz <vituko@gmail.com>, where declare -ag foo=(bar) could modify
+ array variable foo at previous function scope, not global scope
+
+ 12/27
+ -----
+bashline.c
+ - Minix needs the third argument to tputs to be a void funtion taking
+ an int argument, not an int-returning function. Fix from
+ John E. Malmberg <wb8tyw@qsl.net> as part of VMS bash port
+
+ 12/29
+ -----
+configure.ac,version.c,patchlevel.h
+ - bash-4.3-devel: new version, new shell compatibility level (43)
+
+subst.c
+ - parameter_brace_patsub: put the bash-4.2 code back in from the
+ change of 3/3 that runs the replacement string through quote
+ removal, make it dependent on shell_compatibility_level <= 42
+
+builtins/shopt.def
+ - compat42: new shopt option
+ - set_compatibility_level: change logic to set and unset various
+ compat variables and shell_compatibility_level
+
+COMPAT
+ - new documentation for bash-4.3 compatibility changes
+
+doc/{bash.1,bashref.texi}
+ - compat42: document new shopt option
+
+builtins/shopt.def
+ - set_compatibility_opts: new function, sets the various shopt
+ compat variables based on the value of shell_compatibility_level
+
+builtins/common.h
+ - set_compatibility_opts: new extern declaration
+
+variables.c
+ - BASH_COMPAT: new special variable; sets the shell compatibility
+ level. Accepts values in decimal (4.2) or integer (42) form;
+ Unsetting variable, setting it to empty string, or setting it to
+ out-of-range value sets the shell's compatibility level to the
+ default for the current version. Valid values are 3.1/31 through
+ the current version
+ - sv_shcompat: new function implementing logic for BASH_COMPAT
+
+variables.h
+ - sv_shcompat: new extern declaration
+
+doc/{bash.1,bashref.texi}
+ - BASH_COMPAT: description of new variable
+
+lib/readline/complete.c
+ - _rl_colored_stats: default back to 0 for 4.3 release branch
+
+ 1/5/2013
+ --------
+quit.h
+ - remove spurious call to itrace in CHECK_WAIT_INTR
+
+bashline.c
+ - bash_event_hook: if we're going to jump to top_level, make sure we
+ clean up after readline() by calling rl_cleanup_after_signal().
+ Fixes bug reported against devel branch by Raphaël Droz
+ <raphael.droz@gmail.com>
+ - bash_event_hook: reset the event hook before checking for signals
+ or traps in case we longjmp
+
+doc/{bash.1,bashref.texi}
+ - small additions to the set -e section to make it more clear that
+ contexts where -e is ignored extend to compound commands as well
+ as shell functions
+
+lib/readline/readline.h
+ - rl_signal_event_hook: new extern declaration
+
+lib/readline/input.c
+ - rl_signal_event_hook: new variable, hook function to call when a
+ function (currently just read(2)) is interrupted by a signal and
+ not restarted
+ - rl_getc: call rl_signal_event_hook instead of rl_event_hook
+
+lib/readline/doc/rltech.texi
+ - rl_signal_event_hook: document new function
+
+bashline.c
+ - changes to set rl_signal_event_hook instead of rl_event_hook
+
+lib/readline/readline.h
+ - change readline version numbers to 6.3
+
+ 1/6
+ ---
+doc/{bash.1,bashref.texi}
+ - a couple of changes to the descriptions of the ERR trap and its
+ effects based on a message from Rob Nagler <nagler@bivio.biz>
+
+ 1/9
+ ---
+expr.c
+ - expassign: invalidate curlval before freeing and NULLing tokstr to
+ avoid aliasing issues. Fixes bug reported by Eduardo A. Bustamante
+ López<dualbus@gmail.com> and Dan Douglas <ormaaj@gmail.com>
+
+braces.c
+ - array_concat: don't be so aggressive in trying to short-circuit. We
+ can only short-circuit if we have a single-element array where the
+ element is an empty string (array[0] == "" array[1] = 0x0). Existing
+ practice requires us to replicate arrays and prefix or append empty
+ strings. Fixes bug reported by Eduardo A. Bustamante López
+ <dualbus@gmail.com>
+
+ 1/11
+ ----
+execute_cmd.c
+ - execute_builtin: since mapfile uses evalstring() to run its callbacks
+ internally, just like eval, so it needs to handle the case where the
+ temp environment given to mapfile persists throughout the entire
+ set of callback commands. This might be a problem with trap also, but
+ trap isn't run in the same way. Fixes bug reported by Dan Douglas
+ <ormaaj@gmail.com>
+
+ 1/13
+ ----
+redir.c
+ - redirection_error: before expanding the redirection word (if
+ expandable_redirection_filename returns true), disable command
+ substitution during expansion. Fixes bug reported by Dan Douglas
+ <ormaaj@gmail.com>
+
+subst.c
+ - expand_word_internal: case '\\': if the next character is an IFS
+ character, and the expansion occurs within double quotes, and the
+ character is not one for which backslash retains its meaning, add
+ the (escaped) '\' and the (escaped) character. Fixes bug reported
+ by Dan Douglas <ormaaj@gmail.com>
+
+ 1/15
+ ----
+builtins/cd.def
+ - cd_builtin: make sure call to internal_getopt handles -e option.
+ Fixes bug reported by <mashimiao.fnst@cn.fujitsu.com>
+
+ 1/17
+ ----
+subst.c
+ - expand_word_list_internal: make sure tempenv_assign_error is
+ initialized to 0
+
+execute_cmd.c
+ - execute_simple_command: make sure tempenv_assign_error is reset to 0
+ after it's tested to see if an error should force the shell to exit.
+ Fixes problem where a the failure of a tempenv assignment preceding
+ a non-special builtin `sticks' and causes the next special builtin
+ to exit the shell. From a discussion on bug-bash started by
+ douxin <wq-doux@cn.fujitsu.com>
+
+ 1/20
+ ----
+subst.c
+ - parameter_brace_expand_rhs: call stupidly_hack_special_variables
+ after assigning with ${param[:]=word} even if IFS is changing.
+ Suggested by Dan Douglas <ormaaj@gmail.com> [TENTATIVE, needs work
+ on IFS side effects]
+
+command.h
+ - W_GLOBEXP (which was unused) is now W_SPLITSPACE (which isn't used
+ yet)
+
+{execute_cmd,subst,variables}.c
+ - removed all code that mentioned W_GLOBEXP
+ - removed mention of gnu_argv_flags and code that set it
+
+ 1/22
+ ----
+subst.c
+ - param_expand: set W_SPLITSPACE if we expand (unquoted) $* and
+ IFS is unset or null so we can be sure to split this on spaces
+ no matter what happens with IFS later
+ - expand_word_internal: note that param_expand returns W_SPLITSPACE
+ in the returned word flags and keep track of that state with
+ `split_on_spaces'
+
+ 1/23
+ ----
+subst.c
+ - expand_word_internal: if split_on_spaces is non-zero, make sure
+ we split `istring' on spaces and return the resultant word. The
+ previous expansions should have quoted spaces in the positional
+ parameters where necessary. Suggested by Dan Douglas
+ <ormaaj@gmail.com>
+
+execute_cmd.c
+ - execute_command_internal: make sure any subshell forked to run a
+ group command or user subshell at the end of a pipeline runs any
+ EXIT trap it sets. Fixes debian bash bug 698411
+ http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=698411
+
+subst.c
+ - shell_expand_word_list: fix code that creates args for and calls
+ make_internal_declare to avoid calling it twice (missing `else'
+ in 12/26 change)
+ - do_assignment_internal: fix code from 12/26 change to fix problem
+ where an existing assoc variable could be converted to an array
+ without checking `mkassoc'
+
+ 1/24
+ ----
+builtins/evalfile.c
+ - _evalfile: add missing `close (fd)' calls before returning to
+ avoid fd leaks. Bug and fix from Roman Rakus <rrakus@redhat.com>
+
+ 1/25
+ ----
+builtins/read.def
+ - read_builtin: don't try to play tricks with the top of the unwind-
+ protect stack after read gets a SIGALRM; save input_string to new
+ memory, run the stack, then restore input_string and assign the
+ variables. Part of fix for bug reported by konsolebox
+ <konsolebox@gmail.com>; the rest of the fix is with the changes in
+ trap and signal handling and doing away with interrupt_immediately
+
+ 1/26
+ ----
+redir.c
+ - redirection_expand, write_here_string, write_here_document: before
+ calling any of the word expansion functions, after setting
+ expanding_redir to 1 (which bypasses the temp environment in the
+ variable lookup functions), call sv_ifs to reset the cached IFS-
+ related variables set by subst.c:setifs(). This ensures that
+ redirections will not get any IFS values that are set in the
+ temporary environment, as Posix specifies. Then, after the word
+ expansions, after resetting expanding_redir to 0, call sv_ifs
+ again to make sure the cached IFS values are set from any
+ assignments in the temporary environment. We force executing_builtin
+ to 1 to `fool' the variable lookup functions into using any temp
+ environment, then reset it to its old value after sv_ifs returns.
+ This is what allows read() to use the (cached) IFS variables set
+ in the temp environment. Fixes inconsistency reported by Dan Douglas
+ <ormaaj@gmail.com>
+
+ 1/29
+ ----
+lib/readline/display.c
+ - update_line: fix off-by-one error when updating vis_lbreaks array
+ in a multibyte locale that occurs when moving multibyte chars from
+ one line down to another. Bug report and fix from Egmont
+ Koblinger <egmont@gmail.com>
+
+ 1/30
+ ----
+configure.ac
+ - changed version to 4.3-alpha
+
+redir.c
+ - redir_open: handle open returning -1/EINTR, which seems to happen
+ a lot with FIFOs and SIGCHLD, and call QUIT to handle other
+ signals that can interrupt open(2). Bug report and initial fix
+ from Mike Frysinger <vapier@gentoo.org>
+
+ 1/31
+ ----
+subst.c
+ - parameter_brace_expand: make sure to propagate the PF_ASSIGNRHS flag
+ to parameter_brace_expand_word
+ - parameter_brace_expand_word: make sure that if the PF_ASSIGNRHS flag
+ is set and we are expanding ${a[@]} or ${a[*]} we set quoted to
+ include Q_DOUBLE_QUOTES before calling array_value_internal, mirroring
+ what we do for $@ and $*. Fixes inconsistency reported by Dan
+ Douglas <ormaaj@gmail.com>
+
+configure.ac
+ - use AC_CHECK_TOOL instead of AC_CHECK_PROG to check for ar, since it
+ will find $host-prefixed versions of utilities. Report and fix from
+ Mike Frysinger <vapier@gentoo.org>
+
+builtins/setattr.def
+ - set_var_attribute: check whether bind_variable (called when the
+ variable whose attributes are being modified is found in the temp
+ environment) just modified a read-only global variable, and don't
+ bother marking the temporary variable for propagation if so. The
+ propagation is superfluous and will result in a strange error
+ message
+
+ 2/2
+ ---
+variables.c
+ - initialize_shell_variables: don't try to import function definitions
+ with invalid names from the environment if already in posix mode,
+ but create them as (invisible) exported variables so they pass
+ through the environment. Print an error message so user knows
+ what's wrong. Fixes bug reported by Tomas Trnka <ttrnka@mail.muni.cz>
+
+ 2/9
+ ---
+
+builtins/read.def
+ - sigalrm_seen, alrmbuf: now global so the rest of the shell (trap.c)
+ can use them
+ - sigalrm: just sets flag, no longer longjmps to alrmbuf; problem was
+ longjmp without manipulating signal mask, leaving SIGALRM blocked
+
+quit.h
+ - move CHECK_ALRM macro here from builtins/read.def so trap.c:
+ check_signals() can call it
+
+trap.c
+ - check_signals: add call to CHECK_ALRM before QUIT
+ - check_signals_and_traps: call check_signals() instead of including
+ CHECK_ALRM and QUIT inline. Integrating check for read builtin's
+ SIGALRM (where zread call to check_signals_and_traps can see it)
+ fixes problem reported by Mike Frysinger <vapier@gentoo.org>
+
+ 2/12
+ ----
+lib/glob/xmbsrtowcs.c
+ - xdupmbstowcs2: fixed but where end of string was not handled
+ correctly, causing loop to go past end of string in a bunch of cases.
+ Fixes bug reported by "Dashing" <dashing@hushmail.com>
+
+
+ 2/13
+ ----
+builtins/pushd.def
+ - popd_builtin: treat any argument that isn't -n or of the form
+ [-+][[:digit:]]* as an error. Fixes problem reported by Bruce
+ Korb <bruce.korb@gmail.com>
+
+ 2/14
+ ----
+configure.ac
+ - add check for sig_atomic_t; already a placeholder for it in
+ config.h.in
+
+ 2/15
+ ----
+subst.c
+ - do_compound_assignment: don't call assign_compound_array_list with
+ a NULL variable in case make_local_xxx_variable returns NULL
+ (it will if you try to shadow a readonly or noassign variable).
+ Fixes bug reported by Richard Tollerton <rich.tollerton@ni.com>
+
+ 2/16
+ ----
+variables.c
+ - make_local_variable: print error messager if an attempt is made to
+ create a local variable shadowing a `noassign' variable. Previously
+ we just silently refused to do it
+
+trap.[ch]
+ - get_original_signal: now global so rest of the shell can use it
+
+sig.c
+ - initialize_shell_signals: install a signal handler for SIGTERM
+ that does nothing except set a sigterm_received flag instead of
+ ignoring it with SIG_IGN, as long as SIGTERM is not ignored when
+ the shell is started. Use get_original_signal early to get the
+ original handler, since we will do that later anyway
+ - set_signal_handler: if installing sigterm_sighandler as the SIGTERM
+ handler, make sure to add SA_RESTART flag to make it as close to
+ SIG_IGN as possible
+
+sig.h
+ - sigterm_sighandler: new extern declaration
+
+quit.h
+ - RESET_SIGTERM: set sigterm_receved to 0
+ - CHECK_SIGTERM: check sigterm_received; if it's non-zero, treat it
+ as a fatal signal and call termsig_handler to exit the shell
+
+jobs.c
+ - make_child: call RESET_SIGTERM just before fork() so we can detect
+ if the child process received a SIGTERM before it's able to change
+ the signal handler back to what it was when the shell started
+ (presumably SIG_DFL). Only has effect if the shell installed
+ sigterm_sighandler for SIGTERM, interactive shells that were not
+ started with SIG_IGN as the SIGTERM handler
+ - make_child: call RESET_SIGTERM in the parent after fork() so the
+ rest of the shell won't react to it
+
+execute_cmd.c
+ - execute_simple_command: call CHECK_SIGTERM after make_child in child
+ to catch SIGTERM received after fork() and before restoring old
+ signal handlers
+ - execute_disk_command: call CHECK_SIGTERM after make_child in child
+ process after restoring old signal handlers and again just before
+ calling shell_execve. Fixes race condition observed by
+ Padraig Brady <p@draigbrady.com> when testing with his `timeout'
+ program
+
+lib/readline/display.c
+ - open_some_spaces: new function, subset of insert_some_chars that just
+ opens up a specified number of spaces to be overwritten
+ - insert_some_spaces: now just calls to open_some_spaces followed by
+ _rl_output_some_chars
+ - update_line: use col_temp instead of recalculating it using
+ _rl_col_width in the case where we use more columns with fewer bytes
+ - update_line: use open_some_spaces and then output the right number
+ of chars instead of trying to print new characters then overwrite
+ existing characters in two separate calls. This includes removing
+ some dodgy code and making things simpler. Fix from Egmont
+ Koblinger <egmont@gmail.com>
+ - use new variable `bytes_to_insert' instead of overloading temp in
+ some code blocks (nls - nfd, bytes that comprise the characters
+ different in the new line from the old)
+
+ 2/18
+ ----
+redir.c
+ - do_redirection_internal: add undoable redirection for the implicit
+ close performed by the <&n- and >&n- redirections. Fixes bug
+ reported by Stephane Chazelas <stephane.chazelas@gmail.com>
+
+ 2/19
+ ----
+sig.c
+ - termsig_handler: an interactive shell killed by SIGHUP and keeping
+ command history will try to save the shell history before exiting.
+ This is an attempt to preserve the save-history-when-the-terminal-
+ window-is-closed behavior
+
+ 2/21
+ ----
+braces.c
+ - brace_expand: if a sequence expansion fails (e.g. because the
+ integers overflow), treat that expansion as a simple string, including
+ the braces, and try to process any remainder of the string. The
+ remainder may include brace expansions. Derived from SuSE bug
+ 804551 example (https://bugzilla.novell.com/show_bug.cgi?id=804551)
+
+ 2/23
+ ----
+{quit,sig}.h,sig.c
+ - sigterm_received declaration now in sig.h; type is sig_atomic_t
+ - sigwinch_received type now sig_atomic_t
+ - sig.h includes bashtypes.h and <signal.h> if SIG_DFL not defined
+ (same logic as trap.h) to pick up sig_atomic_t
+
+unwind_prot.c
+ - include sig.h before quit.h (reverse order)
+
+ 2/27
+ ----
+builtins/shopt.def
+ - reset_shopt_options: make sure check_window_size is reset to the
+ default from config.h, not unconditionally to 0
+
+jobs.[ch]
+ - last_made_pid, last_asynchronous_pid: now volatile. Change from SuSE
+
+jobs.c
+ - wait_for: if we're using sigaction to install a handler for SIGCHLD,
+ make sure we specify SA_RESTART
+
+lib/{tilde,readline}/shell.c
+ - get_home_dir: instead of looking in the password file every time,
+ look once and cache the result
+
+sig.[ch]
+ - sigwinch_received, sigterm_received: now `volatile' qualified
+
+sig.c,quit.h
+ - interrupt_state,terminating_signal: now sig_atomic_t
+
+ 3/1
+ ---
+MANIFEST,examples/*
+ - removed around 120 files without FSF copyrights; requested by
+ Karl Berry in early January
+
+ 3/2
+ ---
+lib/malloc/malloc.c
+ - morecore: only check whether SIGCHLD is trapped if SIGCHLD is defined
+
+doc/bashref.texi
+ - Fixed most of the examples in the GNU Parallel section to use better
+ shell idioms following complaints on bug-bash; added a couple of
+ examples and smoothed out the text
+
+quit.h
+ - include "sig.h" for sig_atomic_t
+
+lib/readline/display.c
+ - update_line: when inserting one or more characters at the end of
+ the display line in a non-multibyte environment, just write from the
+ first difference to the end of the line and return. We don't have
+ to adjust _rl_last_c_pos. This is needed to adjust from the old
+ two-part copy to a single call to _rl_output_some_chars (change of
+ 2/16)
+
+ 3/4
+ ---
+Makefile.in,doc/Makefile.in
+ - PACKAGE_TARNAME, docdir: new variables substituted by autoconf
+ - OTHER_DOCS,OTHER_INSTALLED_DOCS: new variables with auxiliary
+ documentation files to be installed into $(docdir)
+ - install: add new rule to install $(OTHER_DOCS)
+ - uninstall: add new rule to uninstall $(docdir)/$(OTHER_INSTALLED_DOCS)
+
+doc/bash.1
+ - add URL to `POSIX' file in `SEE ALSO' section; put pointer to that
+ section in --posix and set -o posix descriptions
+
+examples/
+ - removed around 110 examples at the request of the FSF due to copyright
+ issues
+
+ 3/5
+ ---
+builtins/setattr.def
+ - readonly: modified help text slightly to make it clearer that
+ functions aren't changed or displayed unless the -f option is given.
+ Report from <gotmynick@gmail.com>
+
+ 3/9
+ ---
+include/typemax.h
+ - SIZE_MAX: define to 65535 (Posix minimum maximum) if not defined
+
+parse.y
+ - include "typemax.h" for possible SIZE_MAX definition, make sure we
+ include it after shell.h
+
+{braces,expr}.c
+ - include "typemax.h" for possible INTMAX_MIN and INTMAX_MAX definitions
+
+ 3/10
+ ----
+bashline.c
+ - bash_default_completion: make sure completion type of `!' (same as
+ TAB but with show-all-if-ambiguous set) and glob-word-completion
+ sets rl_filename_completion_desired to 0 so extra backslashes don't
+ get inserted by `quoting' the completion. We can't kill all the
+ matches because show-all-if-ambiguous needs them. Bug report from
+ Marcel (Felix) Giannelia <info@skeena.net>
+
+[bash-4.3-alpha frozen]
+
+ 3/14
+ ----
+general.c
+ - trim_pathname: use memmove instead of memcpy since the source and
+ destination pathnames may overlap. Report and fix from Matthew
+ Riley <mattdr@google.com>
+
+ 3/18
+ ----
+configure.ac
+ - socklen_t is defined as `unsigned int' if configure can't find it
+
+ 3/20
+ ----
+lib/readline/complete.c
+ - S_ISVTX: since it's not defined on all platforms (Minix), make sure
+ its use is protected with #ifdef
+
+ 3/21
+ ----
+doc/{bash.1,bashref.texi}
+ - Added mention of ${!name[@]} and ${!name[*]} expansions to get all
+ indices of an array. Suggested by Jonathan Leffler
+ <jonathan.leffler@gmail.com>
+
+ 3/24
+ ----
+subst.h
+ - SD_IGNOREQUOTE: new define for skip_to_delim; if set, means that
+ single quotes (for now) will be treated as ordinary characters
+
+subst.c
+ - skip_to_delim: handle SD_IGNOREQUOTE. no callers use it for now
+
+ 3/25
+ ----
+support/config.{guess,sub}
+ - updated to versions from autoconf-2.69
+
+ 3/31
+ ----
+lib/sh/shquote.c
+ - sh_single_quote: short-circuit quoting a single "'" instead of
+ creating a long string with empty single-quoted strings
+
+parser.h
+ - DOLBRACE_QUOTE2: new define, like DOLBRACE_QUOTE, but need to single-
+ quote results of $'...' expansion because quote removal will be
+ done later. Right now this is only done for ${word/pat/rep}
+
+parse.y
+ - parse_matched_pair: set state to DOLBRACE_QUOTE2 for pattern
+ substitution word expansion so we don't treat single quote specially
+ in the pattern or replacement string
+ - parse_matched_pair: if we're parsing a dollar-brace word expansion
+ (${...}) and we're not treating single quote specially within
+ double quotes, single-quote the translation of $'...' ansi-c
+ escaped strings. Original report and fix from Eduardo A.
+ Bustamante López <dualbus@gmail.com>
+
+subst.c
+ - extract_dollar_brace_string: ${word/pat/rep} scanning now sets the
+ DOLBRACE_QUOTE2 flag instead of DOLBRACE_QUOTE so we don't treat
+ single quotes specially within a double-quoted string
+
+execute_cmd.c
+ - fix_assignment_words: skip over assignment statements preceding a
+ command word before trying to figure out whether or not assignment
+ statements following a possible declaration command should be
+ treated specially. Fixes bug reported by Dan Douglas
+ <ormaaj@gmail.com>
+
+ 4/4
+ ---
+lib/readline/readline.c
+ - _rl_dispatch_subseq: only call _rl_vi_set_last (and check whether
+ the key is a text modification command) if the key sequence length
+ is 1. That keeps the arrow keys from setting the last command
+ when called in vi command mode. Fixes bug reported by Ian A.
+ Watson <watson_ian_a@lilly.com>
+
+ 4/6
+ ---
+lib/readline/bind.c
+ - rl_parse_and_bind: when parsing a double-quoted string as the value
+ of a variable, make sure we skip past the leading double quote.
+ Fix from Andreas Schwab <schwab@linux-m68k.org>
+
+variables.c
+ - hash_lookup: set new local variable last_table_searched to the table
+ a successful lookup appears in; tested in make_local_variable to
+ solve the problem below
+ - make_local_variable: if we find a variable with the tempenv flag
+ set at the same `level' as variable_context', but not found in the
+ temporary_env (temp environment preceding the builtin), return it.
+ The temp environment preceding the function call has already been
+ merged (in execute_function) into the list of variable contexts the
+ function sees as shell_variables by the time this is called. Fixes
+ inconsistency pointed out by Dan Douglas <ormaaj@gmail.com>
+
+subst.c
+ - expand_arith_string: expanded out contents of expand_string,
+ expand_string_internal, expand_string_if_necessary to create a
+ WORD_DESC and call call_expand_word_internal() on it directly.
+ We don't want process substitution to be performed ( 1<(2) ) should
+ mean something different in an arithmetic expression context.
+ It doesn't work to just turn on the DQUOTE flag, since that means
+ that things like ${x["expression"]} are not expanded correctly.
+ Fixes problem pointed out by Dan Douglas <ormaaj@gmail.com>
+
+ 4/13
+ ----
+subst.c
+ - process_substitute: run the EXIT trap before exiting, as other
+ shells seem to. Fixes problem pointed out by Dan Douglas
+ <ormaaj@gmail.com>
+
+lib/readline/readline.c
+ - readline_internal_setup: call rl_vi_insertion_mode to enter vi
+ mode instead of rl_vi_insert_mode to avoid resetting the saved last
+ command information. Posix says that `.' can repeat a command
+ that was entered on a previous line so we need to save the info.
+ Fixes bug reported by Ian A. Watson <watson_ian_a@lilly.com>
+
+ 4/14
+ ----
+lib/readline/complete.c
+ - rl_completion_matches: make sure xrealloc returns something non-null
+ (can happen when interrupted by a signal) before trying to add
+ matches to match_list
+
+subst.c
+ - array_remove_pattern: return NULL right away if array_variable_part
+ returns an invisible variable
+ - array_length_reference: handle array_variable_part returning an
+ invisible variable
+ - get_var_and_type: handle array_variable_part returning an invisible
+ variable
+
+ 4/15
+ ----
+execute_cmd.c
+ - execute_command_internal: make sure to run the EXIT trap for group
+ commands anywhere in pipelines, not just at the end. From a point
+ raised by Andreas Schwab <schwab@linux-m68k.org>
+
+variables.c
+ - bind_int_variable: make sure invisible flag is unset. Fixes problems
+ like "declare -ai a; : $(( a[4]=4 ));"
+
+arrayfunc.c
+ - array_variable_part: return variable even if invisible flag set,
+ callers must handle invisible vars
+
+ 4/18
+ ----
+builtins/set.def
+ - unset_builtin: if -n flag given, call unset_nameref instead of
+ unset_variable
+
+variables.c
+ - find_variable_nameref: print warning message if nameref circular
+ reference detected, return NULL and let caller deal with it
+
+builtins/declare.def
+ - declare_builtin: only disallow global references at this point if
+ we are at the global scope
+
+ 5/16
+ ----
+configure.ac
+ - update release status to beta
+
+ 5/23
+ ----
+trap.c
+ - run_pending_traps: save and restore pipeline around calls to
+ evalstring() in case we get a trap while running a trap. Have to
+ figure out the recursive running traps issue elsewhere. Fixes
+ bug reported by Roman Rakus <rrakus@redhat.com>
+ - run_pending_traps: make sure to set running_trap to the appropriate
+ signal value when running a trap command
+ - run_pending_traps: short-circuit immediately if running_trap set
+ when invoked. Could change this later to only skip if it would
+ run the same trap as currently being run (running_trap == sig + 1)
+
+configure.ac
+ - add warning if bison not found
+
+lib/readline/doc/rltech.texi
+ - new section with an example program illustrating the callback
+ interface. Suggested by Peng Yu <pengyu.ut@gmail.com>
+
+examples/loadables/Makefile.in
+ - remove references to `cut' and `getconf', which were removed in
+ early March
+
+ 5/28
+ ----
+lib/sh/pathphys.c
+ - sh_realpath: correct inverted two arguments to call to sh_makepath.
+ Report and fix from Julien Thomas <jthomas@exosec.fr>
+
+ 6/7
+ ---
+execute_cmd.c
+ - executing_line_number: the else clauses that are conditional on
+ various options being defined can simply be if clauses -- they are
+ mutually exclusive and all have `return' in the body. Fixes bug
+ reported by Flavio Medeiros <flaviomotamedeiros@gmail.com>
+
+ 6/25
+ ----
+lib/readline/readline.c
+ - readline_internal_setup: only sent the meta-key enable string to the
+ terminal if we've been told to use one and the terminal has been
+ successfully initialized (RL_ISSTATE (RL_STATE_TERMPREPPED) != 0).
+ Suggested by Dan Mick <dan.mick@inktank.com>
+
+lib/readline/signals.c
+ - _rl_signal_handler: call any defined signal hook after calling
+ rl_resize_terminal when handling a SIGWINCH. We already have called
+ the original SIGWINCH handler but will not be resending the signal
+ to ourselves
+
+ 6/27
+ ----
+lib/readline/doc/history.3, doc/bash.1
+ - fix description of the `$' modifier to note that it expands to the
+ last *word*, which is not always the last argument. Report from
+ ariyetz@gmail.com via gnu.org RT
+
+ 6/29
+ ----
+lib/glob/smatch.c
+ - glob_asciiranges: initialize to value of GLOBASCII_DEFAULT instead
+ of 0 (0 if not defined)
+
+configure.ac,config.h.in
+ - --enable-glob-asciiranges-default: new option, controls the value of
+ GLOBASCII_DEFAULT; use it to turn globasciiranges shopt option on
+ by default
+
+doc/bashref.texi
+ - document new --enable-glob-asciiranges-default configure option
+
+variables.c
+ - assign_in_env: implement += value appending semantics for assignments
+ preceding command names
+
+ 7/4
+ ---
+expr.c
+ - set lasttok = NUM in all of the functions that result in a number,
+ even if it's a boolean, to avoid errors with constructs like
+ 1 * x = 1, which should be an asignment error. Fixes problem
+ pointed out by Dan Douglas <ormaaj@gmail.com>
+
+parse.y
+ - decode_prompt_string: don't bother to call strcpy if
+ polite_directory_format returns its argument unchanged. It's not
+ necessary and Mac OS X 10.9 aborts because of a supposed overlapping
+ string copy. Bug and fix from simon@hitzemann.org
+
+subst.c
+ - parameter_brace_find_indir: new function, code from
+ parameter_brace_expand_indir that looks up the indirectly-referenced
+ variable, but does not expand it
+ - parameter_brace_expand_indir: call parameter_brace_find_indir to
+ look up indirected variable reference
+ - get_var_and_type: call parameter_brace_find_indir if it looks like we
+ are trying to manipulate an indirect variable reference like
+ ${!b%%foo}. This makes a difference if !b references an array
+ variable. Bug report from Dan Douglas <ormaaj@gmail.com>
+
+ 7/6
+ ---
+lib/sh/casemod.c
+ - sh_modcase: make sure argument passed to is_basic is <= UCHAR_MAX,
+ since cval can convert something to a wchar_t greater than UCHAR_MAX.
+ Fixes bug reported by Tomasz Tomasik <scx.mail@gmail.com>
+
+ 7/8
+ ---
+lib/readline/history.c
+ - add_history_time: if history_length == 0, referencing history_length
+ - 1 will result in an array bounds error, so make history_length be
+ at least 1 before going on. Fixes bug reported by Geng Sheng Liu
+ <gsliu.tju@gmail.com>
+
+builtins/setattr.def
+ - show_func_attributes: display definition (if NODEFS argument is 0) and
+ attributes for a particular function; used by `declare -fp name'
+
+builtins/declare.def
+ - declare_internal: call show_func_attributes if -f supplied with -p.
+ Fixes inconsistency observed by Linda Walsh <bash@tlinx.org>
+
+builtins/common.h
+ - new extern declaration for show_func_attributes
+
+builtins/read.def
+ - read_builtin: check the first supplied variable name for validity
+ before attempting to read any input, since we know we will have to
+ at least use that one. Don't check any other names yet. Suggested
+ by jidanni@jidanni.org
+
+ 7/10
+ ----
+redir.c
+ - do_redirection_internal: when closing a file descriptor with
+ r_close_this ([n]<&-) count close errors as redirection errors if
+ errno ends up as EIO or ENOSPC. Originally reported back in April
+ 2012 by Andrey Zaitsev <jstcdr@gmail.com>
+
+ 7/11
+ ----
+redir.c
+ - do_redirection_internal: before calling check_bash_input, make sure
+ that we don't call check_bash_input for an asynchronous process that
+ is replacing stdin with something else. The seek backwards affects
+ 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. 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
+
+ 8/1
+ ---
+doc/{bash.1,bashref.texi}
+ - minor changes to description of $! based on a report from Chris
+ Down <chris@chrisdown.name>
+
+arrayfunc.c
+ - assign_array_element_internal: before trying to get an array's max
+ index to process a negative subscript, make sure the array exists.
+ Bug report from Geir Hauge <geir.hauge@gmail.com>
+
+ 8/2
+ ---
+arrayfunc.c
+ - assign_array_element_internal: before using array_max_index() when
+ processing a negative subscript, make sure the variable is an array.
+ if it's not, use 0 as array_max_index assuming it's a string.
+ Fixes bug report from Geir Hauge <geir.hauge@gmail.com>
+
+ 8/3
+ ---
+Makefile.in
+ - pcomplete.o: add dependency on $(DEFDIR)/builtext.h. Suggested by
+ Curtis Doty <curtis@greenkey.net>
+
+ 8/5
+ ---
+lib/glob/sm_loop.c
+ - strcompare: short-circuit and return FNM_NOMATCH if the lengths of the
+ pattern and string (pe - p and se - s, respectively) are not equal
+ - strcompare: don't bother trying to set *pe or *se to '\0' if that's
+ what they already are. Fixes bug reported by Geir Hauge
+ <geir.hauge@gmail.com>
+
+ 8/6
+ ---
+doc/{bash.1,bashref.texi},builtins/hash.def,lib/readline/doc/rluser.texi
+ - minor typo changes from Geir Hauge <geir.hauge@gmail.com>
+
+bultins/help.def
+ - show_longdoc: avoid trying to translate the empty string because it
+ often translates to some boilerplate about the project and
+ translation. Report and fix from Geir Hauge <geir.hauge@gmail.com>
+
+ 8/8
+ ---
+builtins/help.def
+ - help_builtin: try two passes through the list of help topics for each
+ argument: one doing exact string matching and one, if the first pass
+ fails to find a match, doing string prefix matching like previous
+ versions. This prevents `help read' from matching both `read' and
+ `readonly', but allows `help r' to match everything beginning with
+ `r'. Inspired by report from Geir Hauge <geir.hauge@gmail.com>
+
+ 8/13
+ ----
+builtins/fc.def
+ - fc_builtin,fc_gethnum: calculate `real' end of the history list and
+ use it if -0 is specified as the beginning or end of the history
+ range to list. Doesn't work for fc -e or fc -s by design. Feature
+ requested by Mike Fied <micfied@gmail.com>
+
+ 8/16
+ ----
+trap.c
+ - _run_trap_internal: use {save,restore}_parser_state instead of
+ {save,restore}_token_state. It's more comprehensive
+
+ 8/23
+ ----
+doc/bash.1
+ - disown: remove repeated text. Report and fix from Thomas Hood
+ <jdthood@gmail.com>
+
+ 8/25
+ ----
+lib/readline/rltty.c
+ - set_special_char: fix prototype (last arg is rl_command_func_t *)
+
+sig.c
+ - set_signal_handler: return oact.sa_handler only if sigaction
+ succeeds; if it doesn't, return SIG_DFL (reasonable default). From
+ https://bugzilla.redhat.com/show_bug.cgi?id=911404
+
+bashline.c
+ - attempt_shell_completion: fix to skip assignment statements preceding
+ command name even if there are no programmable completions defined.
+ From https://bugzilla.redhat.com/show_bug.cgi?id=994659
+ - attempt_shell_completion: if still completing command word following
+ assignment statements, do command completion even if programmable
+ completion defined for partial command name entered so far
+
+ 8/26
+ ----
+pcomplete.c
+ - pcomp_filename_completion_function: make sure rl_filename_dequoting_function
+ is non-NULL before trying to call it. Bug and fix from
+ Andreas Schwab <schwab@linux-m68k.org>
+
+bashline.c
+ - bash_command_name_stat_hook: if *name is not something we're going
+ to look up in $PATH (absolute_program(*name) != 0), just call the
+ usual bash_filename_stat_hook and return those results. This makes
+ completions like $PWD/exam[TAB] add a trailing slash
+
+ 9/2
+ ---
+builtins/read.def
+ - read_builtin: before comparing what we read to the delim, make sure
+ we are not supposed to be ignoring the delimiter (read -N). We
+ set the delim to -1, but it's possible to read a character whose
+ int value ends up being between -1 and -128. Fixes bug
+ reported by Stephane Chazelas <stephane.chazelas@gmail.com>
+
+doc/{bash.1,bashref.texi}
+ - word splitting: crib some language from Posix to make it clear that
+ characters in IFS are treated as field *terminators*, not field
+ *separators*. Addresses issue raised by DJ Mills
+ <danielmills1@gmail.com>
+
+lib/readline/{util.c,rldefs.h}
+ - _rl_stricmp,_rl_strnicmp: now take const char * string arguments;
+ changed prototype declarations
+
+ 9/5
+ ---
+doc/{bash.1,bashref.texi}
+ - [[: modify description of pattern matching to make it clear that the
+ match is performed as if the extglob option were enabled. From Red
+ Hat bug https://bugzilla.redhat.com/show_bug.cgi?id=1002078
+
+ 9/12
+ ----
+lib/readline/isearch.c
+ - _rl_isearch_dispatch: if we read an ESC and it's supposed to
+ terminate the search, make sure we check for typeahead with
+ _rl_pushed_input_available, since installing a hook function causes
+ typeahead to be collected in `ibuffer' (input.c). If there is any,
+ make sure we still use the ESC as a prefix character. Bug and fix
+ from Mike Miller <mtmiller@ieee.org>
+
+ 9/16
+ ----
+builtins/{caller,cd,kill,pushd,wait}.def
+ - builtin_usage(): make sure call to this sets return status to
+ EX_USAGE
+
+ 9/18
+ ----
+terminal.c
+ - rl_change_environment: new application-settable variable; if non-
+ zero (the default), readline will modify LINES and COLUMNS in the
+ environment when it handles SIGWINCH
+ - _rl_get_screen_size: if rl_change_environment is non-zero, use setenv
+ to modify LINES and COLUMNS environment variables
+
+readline.h
+ - rl_change_environment: new extern declaration for applications
+
+ 9/22
+ ----
+configure.ac
+ - relstatus: bumped version to bash-4.3-beta2
+
+ 9/24
+ ----
+
+lib/readline/readline.c
+ - bind_arrow_keys_internal: added more key bindings for the numeric key
+ pad arrow keys on mingw32. Patch from Pierre Muller
+ <pierre.muller@ics-cnrs.unistra.fr>
+
+ 10/19
+ -----
+
+bashline.c
+ - maybe_restore_tilde: version of restore_tilde that honors `direxpand';
+ calls restore_tilde after saving directory expansion hook if
+ necessary. Report from Andreas Schwab <schwab@linux-m68k.org>
+
+builtins/cd.def
+ - -@: new option, allows cd to use `extended attributes' present in
+ NFSv4, ZFS; idea taken from ksh93. Attributes associated with a
+ file are presented as a directory containing the attributes as
+ individual files. Original patch contributed by Cedric Blancher
+ <cedric.blancher@gmail.com>
+
+ 10/20
+ -----
+aclocal.m4
+ - BASH_CHECK_MULTIBYTE: check for wcwidth being broken with unicode
+ combining characters needs a value to use when cross-compiling.
+ Bug report from Bert Sutherland <bertsutherland@gmail.com>
+
+doc/{bash.1,bashref.texi}
+ - document new -@ option to cd builtin
+
+ 10/28
+ -----
+lib/glob/{{gmisc,glob}.c,glob.h}
+ - extglob_pattern renamed to extglob_pattern_p, declared in glob.h
+
+subst.c
+ - expand_word_internal: typo fix: case to fix " $@\ " bug in bash-4.2
+ had a typo (& isexp instead of &&)
+
+ 10/29
+ -----
+input.c
+ - getc_with_restart: make sure local_index and local_bufused are
+ reset to 0 before returning EOF, in case we are running an interactive
+ shell without line editing and ignoreeof is set. Report and fix
+ from Yong Zhang <yong.zhang@windriver.com>
+
+lib/readline/search.c
+ - _rl_nsearch_init: take out extra third argument to rl_message; it
+ only matches prototype (and maybe format) in cases where
+ PREFER_STDARG and USE_VARARGS are both undefined, which is rare
+
+ 10/31
+ -----
+subst.c
+ - process_substitute: when opening the named pipe in the child, open
+ without O_NONBLOCK to avoid race conditions. Happens often on AIX.
+ Bug report and fix from Michael Haubenwallner
+ <michael.haubenwallner@salomon.at>
+
+builtins/ulimit.def
+ - RLIMIT_NTHR: if RLIMIT_PTHREAD is not defined, but RLIMIT_NTHR is,
+ use RLIMIT_NTHR (NetBSD)
+
+ 11/5
+ ----
+locale.c
+ - set_default_locale_vars,set_locale_var: if TEXTDOMAINDIR has been
+ set, and default_dir has a non-null value, call bindtextdomain(3)
+ when TEXTDOMAIN is assigned a value. Fixes problem reported by
+ Michael Arlt <qwertologe@googlemail.com>
+
+ 11/6
+ ----
+builtins/cd.def
+ - cdxattr: only create synthetic pathname in `buf' if NDIRP argument
+ is non-null
+ - change_to_directory: if we have specified -@ and cdxattr returns
+ failure, fail immediately. Fixes bug reported by Joshuah Hurst
+ <joshhurst@gmail.com>
+
+ 11/12
+ -----
+redir.c
+ - print_redirection: change r_err_and_out (&>) and its append form,
+ r_append_err_and_out (&>>) cases to separate redirection operator
+ from filename by a space, in case we have a process substitution.
+ Fixes bug reported by admn ombres <admn.ombres@gmail.com>
+
+ 11/15
+ -----
+execute_cmd.c
+ - execute_simple_command: don't close process substitution fds until
+ we are finished executing any current shell function. Partial fix
+ for bug reported by John Dawson <john.dawson@gmail.com>
+
+support/shobj-conf
+ - add support for Darwin 13 (Mac OS X 10.9, Mavericks). Based on a
+ report by Ludwig Schwardt <ludwig.schwardt@gmail.com>
+
+ 11/20
+ -----
+[bash-4.3-rc1 frozen]
+
+ 11/24
+ -----
+builtins/printf.def
+ - bind_printf_variable: make sure that the variable assigned to is
+ no longer marked as invisible. Fixes bug reported by NBaH
+ <nbah@sfr.fr>
+
+ 11/28
+ -----
+jobs.c
+ - delete_old_job: fix off-by-one error in job index in call to
+ internal_warning. Bug report from Peter Cordes <peter@cordes.ca>
+
+ 11/30
+ -----
+doc/bashref.texi
+ - add string to description of special parameters with name of
+ special parameter prefixed by a $, so you can search for $#,
+ for instance
+
+ 12/2
+ ----
+lib/readline/{histexpand.c
+ - get_history_event: account for current_history() possibly returning
+ NULL. Report and fix from Pankaj Sharma <pankaj.s01@samsung.com>
+
+
+ 12/11
+ -----
+
+lib/readline/parse-colors.c
+ - get_funky_string: don't call abort if we see something we can't
+ parse; just return an error
+ - _rl_parse_colors: if we encounter an error while parsing $LS_COLORS
+ we need to leave _rl_color_ext_list as NULL after freeing its
+ elements, then turn off _rl_colored_stats. Report and fix from Martin
+ Wesdorp <mwesdorp@casema.nl>
+
+ 12/13
+ -----
+
+lib/readline/parse-colors.c
+ - _rl_parse_colors: if we encounter an unrecognized prefix, throw an
+ error but try to recover and go on to the next specification
+
+variables.c
+ - make_local_variable: for new variables this function creates, set
+ the att_invisible attribute. All callers from declare_internal.
+ Indirectly, this is a fix for bug with `declare -n var; var=foo;'
+ reported by Pierre Gaston <pierre.gaston@gmail.com>
+ - bind_variable: if assigning to nameref variable that doesn't have
+ a value yet (e.g., with `declare -n var; var=foo'), don't try to
+ use the unset name. Fixes a segfault reported by Pierre Gaston
+ <pierre.gaston@gmail.com>
+
+execute_cmd.c
+ - execute_command_internal: make sure last_command_exit_value is set
+ to 0 after any command executed in the background. Fixes bug
+ reported by Martin Kealey <martin@kurahaupo.gen.nz>
+
+ 12/17
+ -----
+support/config.{guess,sub}
+ - updated to latest versions from git
+
+ 12/19
+ -----
+parse.y
+ - struct STRING_SAVER: now has a new `flags' element, to identify the
+ caller: alias expansion, double-paren parsing, or parse_and_execute
+ - push_string: now sets flags to PSH_ALIAS if `ap' argument is non-NULL
+ - push_string: now doesn't attempt to call strlen on a NULL string to
+ set shell_input_line_size
+ - parser_expanding_alias, parser_save_alias, parser_restore_alias: new
+ functions to provide an external interface to push_string and
+ pop_string; parser_save_alias sets flags element to PSH_SOURCE (could
+ be renamed PSH_EXTERN someday)
+ - shell_getc: when yy_getc returns '\0', instead of just testing
+ whether the pushed_string_list is not-empty before popping it, don't
+ pop if if the saved string has flags PSH_SOURCE, indicating that
+ parse_and_execute set it before setting bash_input to the string.
+ We should continue reading to the end of that string before popping
+ back to a potential alias. Partial solution for the problem of aliases
+ with embedded newlines containing `.' commands being executed out of
+ order reported by Andrew Martin <andrew.martin@gmail.com>
+ - shell_getc: when yy_getc returns '\0' and there is a saved string of
+ type PSH_SOURCE, restart the read without popping the string stack
+ if we have not read to the end of bash_input.location.string. Rest
+ of fix for out-of-order execution problem
+
+externs.h
+ - parser_expanding_alias, parser_save_alias, parser_restore_alias: new
+ extern function declarations
+
+builtins/evalstring.c
+ - pe_prologue: if the parser is expanding an alias, make sure to add
+ an unwind-protect to restore the alias; undoes the work that will be
+ performed by parse_and_execute/parse_string
+ - parse_and_execute,parse_string: after calling push_stream to save
+ bash_input, check whether or not the parser is currently expanding
+ an alias (parser_expanding_alias() != 0). If it is, we want to save
+ that string in the pushed_string_list, which we do with
+ parser_save_alias.
+
+ 12/23
+ -----
+execute_cmd.c
+ - execute_for_command: make sure to set line_number before expanding
+ the word list, so expansion errors have the right line number.
+ From a report from Ben Okopnik <ben@okopnik.com>
+
+expr.c
+ - exp2: save token pointer before calling readtok(), arrange to use
+ saved token pointer when printing error token on a division by 0
+ error
+
+ 12/27
+ -----
+lib/readline/display.c
+ - rl_redisplay: when calculating effects of invisible characters in a
+ prompt that is split across physical screen lines to set the indices
+ of linebreaks, don't bother testing local_prompt_prefix (line 751).
+ That prefix doesn't matter when calculating prompt visible and
+ invisible characters. Fixes problem reported by Jinesh Choksi
+ <jinesh@onelittlehope.com>
+
+Makefile.in
+ - install: make sure to use $(DESTDIR) when installing OTHER_DOCS.
+ Report and fix from Matthias Klose <doko@debian.org>
+
+doc/texinfo.tex
+ - updated to version of 2013-09-11
+
+ 12/28
+ -----
+lib/readline/undo.c
+ - rl_do_undo: if we are undoing from a history entry (rl_undo_list ==
+ current_history()->data), make sure the change to rl_line_buffer is
+ reflected in the history entry. We use the guts of
+ rl_maybe_replace_line to do the work. Fixes problem reported by
+ gregrwm <backuppc-users@whitleymott.net>
+
+ 12/30
+ -----
+sig.c
+ - sigint_sighandler: if we get a SIGINT (and this signal handler is
+ installed) while the wait builtin is running, note that we received
+ it in the same way as jobs.c:wait_sigint_handler and return. The
+ various wait_for functions will look for that with CHECK_WAIT_INTR.
+ This fixes the wait builtin not being interruptible in an interactive
+ job control shell
+
+ 12/31
+ -----
+trap.c
+ - set_signal_hard_ignored: rename set_signal_ignored to this, since it
+ both sets original_signals[sig] and sets the HARD_IGNORE flag
+ - set_signal_ignored: new function, now just sets original_signals[sig]
+
+trap.h
+ - set_signal_hard_ignored: new external declaration
+
+sig.c
+ - initialize_terminating_signals: call set_signal_hard_ignored instead
+ of set_signal_ignored for signals with disposition SIG_IGN when the
+ shell starts
+
+execute_cmd.c
+ - setup_async_signals: make sure we get the original dispositions for
+ SIGINT and SIGQUIT before starting the subshell, and don't call
+ set_signal_ignored because that sets original_signals[sig]. If we
+ don't, subsequent attempts to reset handling using trap will fail
+ because it thinks the original dispositions were SIG_IGN. Posix
+ interpretation 751 (http://austingroupbugs.net/view.php?id=751)
+
+ 1/2/2014
+ --------
+lib/sh/stringvec.c
+ - strvec_mcreate, strvec_mresize: versions of create and resize that
+ use malloc and realloc, respectively, instead of xmalloc/xrealloc
+
+braces.c
+ - expand_amble,mkseq: use strvec_mcreate/strvec_mresize so we can
+ catch and handle memory allocation failures instead of aborting
+ with the xmalloc/xrealloc interface
+
+lib/sh/strdup.c
+ - strdup replacement function for ancient systems that don't have it
+
+lib/sh/itos.c
+ - mitos: new function, itos that uses strdup instead of savestring
+
+externs.h
+ - strvec_mcreate/strvec_mresize: new extern declarations
+ - mitos: new extern declaration
+
+configure.ac
+ - bash version moved to 4.3-rc2
+
+ 1/6
+ ---
+doc/bash.1,lib/readline/doc/{rluser.texi,readline.3}
+ - separate the description of what happens when readline reads the
+ tty EOF character from the description of delete-char, leaving a
+ note in the delete-char description about common binding for ^D.
+ From suggestion by Parke <parke.nexus@gmail.com>
+
+lib/readline/doc/{version.texi,history.3,*.texi}
+ - updated email addresses and copyright dates
+
+ 1/7
+ ---
+variables.c
+ - delete_var: new function, just removes a variable from a hash table
+ and frees it, without doing anything else
+ - make_variable_value: if we are trying to assign to a nameref variable,
+ return NULL if the value is null or the empty string or not a valid
+ identifier
+
+variables.h
+ - delete_var: new extern declaration
+
+subst.h
+ - ASS_NAMEREF: new define for assignments, means assigning to a nameref
+ variable
+
+builtins/declare.def
+ - declare_internal: if we are creating and assigning to a nameref
+ variable, make sure the value is a valid variable name (checks done
+ by make_variable_value via bind_variable_value) and display an
+ error message, deleting the variable we just created, if it is not.
+ Fixes bug reported by Peggy Russell <prusselltechgroup@gmail.com>
+
+ 1/9
+ ---
+builtins/declare.def
+ - declare_internal: turning on nameref attribute for an existing
+ variable turns off -i/-l/-u/-c attributes (essentially the ones
+ that cause evaluation at assignment time) for ksh93 compat
+
+builtins/setattr.def
+ - show_name_attributes: if asked to display attributes and values for
+ a nameref variable, don't follow the nameref chain to the end. More
+ ksh93 compat
+
+ 1/10
+ ----
+trap.c
+ - _run_trap_internal: use {save,restore}_parser_state instead of
+ {save,restore}_token_state, like in run_pending_traps(); don't
+ need to save and restore last_command_exit_value as a result
+ - _run_trap_internal: call {save,restore}_pipeline like in
+ run_pending_traps()
+ - run_pending_traps: since we no longer run traps in a signal handler
+ context, do not block and unblock the trapped signal while the
+ trap is executing
+ - run_pending_traps: allow recursive invocations (basically, running
+ traps from a trap handler) with only a warning if the shell is
+ compiled in debug mode. If a caller doesn't want this to happen,
+ it should test running_trap > 0. signal_in_progress (sig) only works
+ for the signals the shell handles specially
+
+bashline.c
+ - bash_event_hook: make sure we clean up readline if interrupt_state
+ is set, not only when SIGINT is not trapped. check_signals_and_traps
+ will call check_signals, which calls QUIT, which will longjmp back
+ to top_level, running the interrupt trap along the way. Fixes the
+ problem of signal handlers being reset out from under readline, and
+ not being set properly the next time readline is called, because
+ signals_set_flag is still set to 1. XXX - might need to do this
+ for other signals too?
+
+ 1/11
+ ----
+subst.h
+ - SD_GLOB: new define for skip_to_delim; means we are scanning a
+ glob pattern.
+
+subst.c
+ - skip_to_delim: if flags include SD_GLOB, assume we are scanning a
+ glob pattern. Currently only used to skip bracket expressions
+ which may contain one of the delimiters
+
+ 1/12
+ ----
+subst.c
+ - parameter_brace_expand: when expanding $@ as part of substring
+ expansion, pattern substitution, or case modification, don't turn
+ on the QUOTED_NULL flag. The code that constructs the word to be
+ returned from expand_word_internal expects a different code path
+ when $@ is being expanded. Fixes bug reported by Theodoros
+ V. Kalamatianos <thkala@gmail.com>
+
+ 1/19
+ ----
+subst.c
+ - list_dequote_escapes: new function; analogue of list_quote_escapes
+
+pathexp.c
+ - quote_string_for_globbing: fix case where unescaped ^A is last char
+ in string; need to pass it through unaltered instead of turning it
+ into a bare backslash
+ - quote_string_for_globbing: when quoting for regexp matching in [[,
+ don't treat backslash as a quote character; quote the backslash as
+ any other character. Part of investigation into reports from
+ Eduardo A. Bustamante López <dualbus@gmail.com>
+
+ 1/25
+ ----
+builtins/gen-helpfiles.c
+ - write_helpfiles: add prototype
+ - make sure to #undef xmalloc/xfree/xrealloc/free if USING_BASH_MALLOC
+ is defined. the code does not use them, and we don't link against
+ xmalloc.o. Report from Linda Walsh <bash@tlinx.org>
+
+Makefile.in
+ - variables.o: add dependency on builtins/builtext.h; helps with
+ parallel builds. Report from Linda Walsh <bash@tlinx.org>
+
+support/shobj-conf
+ - darwin: combine the stanzas into one that will not require them to
+ be updated on each Mac OS X release. Report and fix from Max Horn
+ <max@quendi.de>
+
+ 1/27
+ ----
+support/shobj-conf
+ - darwin: changed the install_name embedded into the shared library
+ to contain only the major version number, not the minor one. The
+ idea is that the minor versions should all be API/ABI compatible,
+ and it is better to link automatically with the latest one. Idea
+ from Max Horn <max@quendi.de>
+
+ 1/29
+ ----
+[bash-4.3-rc2 released]
+
+ 1/30
+ ----
+lib/readline/readline.h
+ - rl_clear_history, rl_free_keymap: add extern declarations. Report
+ from Hiroo Hayashi <hiroo.hayashi@computer.org>
+
+general.c
+ - include trap.h for any_signals_trapped() prototype
+
+lib/sh/unicode.c
+ - include <stdio.h> for sprintf prototype
+
+ 1/31
+ ----
+execute_cmd.c
+ - execute_simple_command: only posix-mode shells should exit on an
+ assignment failure in the temporary environment preceding a special
+ builtin. This is what the documentation and code comments have
+ always said
+ - execute_simple_command: make sure redirection errors, word expansion
+ errors, and assignment errors to Posix special builtins cause a
+ non-interactive posix mode shell to exit. Previously the shell
+ would not exit if the failed special builtin was on the LHS of ||
+ or &&
+
+pathexp.c
+ - quote_string_for_globbing: when quoting a regular expression
+ (QGLOB_REGEXP), allow an unquoted backslash to pass through
+ unaltered. Don't use it as a quote character or quote it. More
+ investigation from 1/24 and report by Mike Frysinger
+ <vapier@gentoo.org>
+ - quote_string_for_globbing: when quoting a regular expression
+ (QGLOB_REGEXP), turn CTLESC CTLESC into CTLESC without adding a
+ backslash to quote it. We should not have to quote it because it is
+ not a character special to EREs. More investigation from 1/24
+
+lib/glob/glob.c
+ - glob_testdir: now takes a second flags argument (currently unused);
+ changed prototype and callers
+
+ 2/1
+ ---
+lib/glob/glob.c
+ - glob_testdir: if flags argument includes GX_ALLDIRS (globstar), use
+ lstat so we skip symlinks when traversing the directory tree.
+ Originally reported by Chris Down <chris@chrisdown.name>
+
+ 2/2
+ ---
+lib/readline/undo.c
+ - rl_do_undo: make sure CUR is non-zero before dereferencing it to
+ check cur->data against rl_undo_list. Report and fix from
+ Andreas Schwab <schwab@linux-m68k.org>
+
+doc/{bash.1,bashref.texi}
+ - added slight clarifying language to the description of $*,
+ describing what happens when the expansion is not within double
+ quotes
+
+ 2/4
+ ---
+test.c
+ - unary_test: add code to -v case so that it interprets `bare' array
+ references (foo[1]) and returns true if that index has a value
+
+ 2/5
+ ---
+trap.c
+ - restore_default_signal: fix SIGCHLD special case for SIG_TRAPPED flag
+ off but SIG_INPROGRESS mode set and handler IMPOSSIBLE_TRAP_HANDLER;
+ continue with resetting handler in this case. maybe_set_sigchld_trap
+ will check these things before resetting sigchld trap from
+ run_sigchld_trap. Fixes (apparently long-standing?) problem reported
+ by Alexandru Damian <alexandru.damian@intel.com>
+
+ 2/6
+ ---
+lib/sh/strtrans.c
+ - ansic_quote: fixed a bug when copying a printable character that
+ consumes more than one byte; byte counter was not being incremented.
+ Bug report from jidanni@jidanni.org
+
+ 2/7
+ ---
+input.c
+ - getc_with_restart: if read(2) returns -1/EINTR and interrupt_state or
+ terminating_signal is set (which means QUIT; will longjmp out of this
+ function), make sure the local buffer variables are zeroed out to
+ avoid reading past the end of the buffer on the next call. Bug report
+ from Dan Jacobson <jidanni@jidanni.org>
+
+ 2/9
+ ---
+bashline.c
+ - command_word_completion_function: if a directory in $PATH contains
+ quote characters, we need to quote them before passing the candidate
+ path to rl_filename_completion_function, which performs dequoting on
+ the pathname it's passed. Fixes bug reported by Ilyushkin Nikita
+ <ilyushkeane@gmail.com>
+
+ 2/11
+ ----
+parse.y
+ - xparse_dolparen: save and restore shell_eof_token around call to
+ parse_string, intead of just leaving it set to ')'
+ - shell_getc: when -v is set, only print the command line when
+ shell_eof_token is 0, so we don't print it multiple times when
+ recursively entering the parser to parse $(...) commands. Fixes
+ bug reported by Greg Wooledge <wooledg@eeg.ccf.org>
+
+[changed release status to 4.3-release]
+
+ 2/13
+ ----
+lib/sh/strtrans.c
+ - ansic_quote: handle case where mbrtowc reports that the multibyte
+ sequence is incomplete or invalid. Fixes bug reported by
+ Eduardo A. Bustamante López <dualbus@gmail.com>
+
+ 2/14
+ ----
+variables.c
+ - find_variable_nameref_context: fix a problem that caused the loop
+ to go one context too close to the global context. In some cases,
+ simple variable assignment would set a variable in the global
+ context instead of a local context. Bug report from
+ Geir Hauge <geir.hauge@gmail.com>
+
+ 2/26
+ ----
+[bash-4.3 released]
+
+ 2/27
+ ----
+aclocal.m4
+ - broken wcwidth check: fix typo reported by David Michael
+ <fedora.dm0@gmail.com>
+
+ 2/28
+ ----
+support/bashbug.sh
+ - add ${BUGADDR} to error message printed if sending mail fails
+
+trap.c
+ - _run_trap_internal: don't call {save,restore}_pipeline if running
+ DEBUG trap; run_debug_trap calls them itself. Fixes bug reported
+ by Moe Tunes <moetunes42@gmail.com>
+
+test.c
+ - unary_test: fix 'R' case by using find_variable_noref instead of
+ find_variable
+ - test_unop: add back missing 'R' case. Fixes bug reported by
+ NBaH <nbah@sfr.fr>
+
+ 3/7
+ ---
+pcomplete.c
+ - pcomp_curtxt: new variable, holds the original text to be completed
+ as passed to the programmable completion code
+ - pcomp_filename_completion_function: if we are running compgen
+ (presumably in a shell function completion) and performing readline
+ completion, check the word being completed. If it's not empty, but
+ the original word passed to the programmable completion code is an
+ empty string (""), call a dequoting function if one is available.
+ This compensates for an assumption in bash-completion. Reported by
+ Albert Shih <Albert.Shih@obspm.fr>
+
+lib/readline/readline.c
+ - _rl_dispatch_subseq: when deciding whether or not to set vi mode's
+ idea of the last command, use whether or not the dispatching keymap
+ is vi_movement_keymap instead of the key sequence length. The `c',
+ `d', and `y' commands all take motion commands as `arguments' and
+ will produce key sequences longer than 1 character. The arrow keys
+ will end up dispatching out of a different keymap, so the test will
+ prevent arrow keys from setting the last command (the problem in
+ bash-4.2). Bug report from Daan van Rossum <daan@flash.uchicago.edu>
+
+lib/readline/vi_mode.c
+ - _rl_vi_motion_command: convenience function to test whether a key is
+ a vi-mode motion command
+
+lib/readline/rlprivate.h
+ - _rl_vi_motion_command: extern declaration
--- /dev/null
+Starting bash with the `--posix' command-line option or executing
+`set -o posix' while bash is running will cause bash to conform more
+closely to the Posix.2 standard by changing the behavior to match that
+specified by Posix.2 in areas where the bash default differs.
+
+The following list is what's changed when `posix mode' is in effect:
+
+1. When a command in the hash table no longer exists, bash will re-search
+ $PATH to find the new location. This is also available with
+ `shopt -s checkhash'.
+
+2. The >& redirection does not redirect stdout and stderr.
+
+3. The message printed by the job control code and builtins when a job
+ exits with a non-zero status is `Done(status)'.
+
+4. Reserved words may not be aliased.
+
+5. The Posix.2 PS1 and PS2 expansions of `!' -> history number and
+ `!!' -> `!' are enabled, and parameter expansion is performed on
+ the value regardless of the setting of the `promptvars' option.
+
+6. Interactive comments are enabled by default. (Note that bash has
+ them on by default anyway.)
+
+7. The Posix.2 startup files are executed ($ENV) rather than the normal
+ bash files.
+
+8. Tilde expansion is only performed on assignments preceding a command
+ name, rather than on all assignment statements on the line.
+
+9. The default history file is ~/.sh_history (default value of $HISTFILE).
+
+10. The output of `kill -l' prints all the signal names on a single line,
+ separated by spaces.
+
+11. Non-interactive shells exit if `file' in `. file' is not found.
+
+12. Redirection operators do not perform pathname expansion on the word
+ in the redirection unless the shell is interactive
+
+13. Function names must be valid shell identifiers. That is, they may not
+ contain characters other than letters, digits, and underscores, and
+ may not start with a digit. Declaring a function with an illegal name
+ causes a fatal syntax error in non-interactive shells.
+
+14. Posix.2 `special' builtins are found before shell functions during command
+ lookup.
+
+15. If a Posix.2 special builtin returns an error status, a non-interactive
+ shell exits. The fatal errors are those listed in the POSIX.2 standard,
+ and include things like passing incorrect options, redirection errors,
+ variable assignment errors for assignments preceding the command name,
+ and so on.
+
+16. The environment passed to executed commands is not sorted. Neither is
+ the output of `set'. This is not strictly Posix.2 behavior, but sh
+ does it this way. Ksh does not. It's not necessary to sort the
+ environment; no program should rely on it being sorted.
+
+17. If the `cd' builtin finds a directory to change to using $CDPATH, the
+ value it assigns to $PWD does not contain any symbolic links, as if
+ `cd -P' had been executed.
+
+18. A non-interactive shell exits with an error status if a variable
+ assignment error occurs when no command name follows the assignment
+ statements. A variable assignment error occurs, for example, when
+ trying to assign a value to a read-only variable.
+
+19. A non-interactive shell exits with an error status if the iteration
+ variable in a for statement or the selection variable in a select
+ statement is a read-only variable.
+
+20. Process substitution is not available.
+
+21. Assignment statements preceding POSIX.2 `special' builtins persist in
+ the shell environment after the builtin completes.
+
+There is other Posix.2 behavior that bash does not implement. Specifically:
+
+1. Assignment statements affect the execution environment of all builtins,
+ not just special ones.
--- /dev/null
+This file is set.def, from which is created set.c.
+It implements the "set" and "unset" builtins in Bash.
+
+Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
+
+This file is part of GNU Bash, the Bourne Again SHell.
+
+Bash is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 1, or (at your option) any later
+version.
+
+Bash is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License along
+with Bash; see the file COPYING. If not, write to the Free Software
+Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+$PRODUCES set.c
+
+#include <stdio.h>
+#include "../shell.h"
+#include "../flags.h"
+
+#include "bashgetopt.h"
+
+extern int interactive;
+extern int noclobber, posixly_correct;
+#if defined (READLINE)
+extern int rl_editing_mode, no_line_editing;
+#endif /* READLINE */
+
+$BUILTIN set
+$FUNCTION set_builtin
+$SHORT_DOC set [--abefhkmnptuvxldBCHP] [-o option] [arg ...]
+ -a Mark variables which are modified or created for export.
+ -b Notify of job termination immediately.
+ -e Exit immediately if a command exits with a non-zero status.
+ -f Disable file name generation (globbing).
+ -h Locate and remember function commands as functions are
+ defined. Function commands are normally looked up when
+ the function is executed.
+ -i Force the shell to be an "interactive" one. Interactive shells
+ always read `~/.bashrc' on startup.
+ -k All keyword arguments are placed in the environment for a
+ command, not just those that precede the command name.
+ -m Job control is enabled.
+ -n Read commands but do not execute them.
+ -o option-name
+ Set the variable corresponding to option-name:
+ allexport same as -a
+ braceexpand same as -B
+#if defined (READLINE)
+ emacs use an emacs-style line editing interface
+#endif /* READLINE */
+ errexit same as -e
+ histexpand same as -H
+ ignoreeof the shell will not exit upon reading EOF
+ interactive-comments
+ allow comments to appear in interactive commands
+ monitor same as -m
+ noclobber disallow redirection to existing files
+ noexec same as -n
+ noglob same as -f
+ nohash same as -d
+ notify save as -b
+ nounset same as -u
+ physical same as -P
+ posix change the behavior of bash where the default
+ operation differs from the 1003.2 standard to
+ match the standard
+ privileged same as -p
+ verbose same as -v
+#if defined (READLINE)
+ vi use a vi-style line editing interface
+#endif /* READLINE */
+ xtrace same as -x
+ -p Turned on whenever the real and effective user ids do not match.
+ Disables processing of the $ENV file and importing of shell
+ functions. Turning this option off causes the effective uid and
+ gid to be set to the real uid and gid.
+ -t Exit after reading and executing one command.
+ -u Treat unset variables as an error when substituting.
+ -v Print shell input lines as they are read.
+ -x Print commands and their arguments as they are executed.
+ -l Save and restore the binding of the NAME in a FOR command.
+ -d Disable the hashing of commands that are looked up for execution.
+ Normally, commands are remembered in a hash table, and once
+ found, do not have to be looked up again.
+#if defined (BRACE_EXPANSION)
+ -B the shell will perform brace expansion
+#endif /* BRACE_EXPANSION */
+#if defined (BANG_HISTORY)
+ -H Enable ! style history substitution. This flag is on
+ by default.
+#endif /* BANG_HISTORY */
+ -C If set, disallow existing regular files to be overwritten
+ by redirection of output.
+ -P If set, do not follow symbolic links when executing commands
+ such as cd which change the current directory.
+
+Using + rather than - causes these flags to be turned off. The
+flags can also be used upon invocation of the shell. The current
+set of flags may be found in $-. The remaining n ARGs are positional
+parameters and are assigned, in order, to $1, $2, .. $n. If no
+ARGs are given, all shell variables are printed.
+$END
+
+/* An a-list used to match long options for set -o to the corresponding
+ option letter. */
+struct {
+ char *name;
+ int letter;
+} o_options[] = {
+ { "allexport", 'a' },
+#if defined (BRACE_EXPANSION)
+ { "braceexpand",'B' },
+#endif
+ { "errexit", 'e' },
+ { "histexpand", 'H' },
+ { "monitor", 'm' },
+ { "noexec", 'n' },
+ { "noglob", 'f' },
+ { "nohash", 'd' },
+#if defined (JOB_CONTROL)
+ { "notify", 'b' },
+#endif /* JOB_CONTROL */
+ {"nounset", 'u' },
+ {"physical", 'P' },
+ {"privileged", 'p' },
+ {"verbose", 'v' },
+ {"xtrace", 'x' },
+ {(char *)NULL, 0},
+};
+
+#define MINUS_O_FORMAT "%-15s\t%s\n"
+
+void
+list_minus_o_opts ()
+{
+ register int i;
+ char *on = "on", *off = "off";
+
+ printf (MINUS_O_FORMAT, "noclobber", (noclobber == 1) ? on : off);
+
+ if (find_variable ("ignoreeof") || find_variable ("IGNOREEOF"))
+ printf (MINUS_O_FORMAT, "ignoreeof", on);
+ else
+ printf (MINUS_O_FORMAT, "ignoreeof", off);
+
+ printf (MINUS_O_FORMAT, "interactive-comments",
+ interactive_comments ? on : off);
+
+ printf (MINUS_O_FORMAT, "posix", posixly_correct ? on : off);
+
+#if defined (READLINE)
+ if (no_line_editing)
+ {
+ printf (MINUS_O_FORMAT, "emacs", off);
+ printf (MINUS_O_FORMAT, "vi", off);
+ }
+ else
+ {
+ /* Magic. This code `knows' how readline handles rl_editing_mode. */
+ printf (MINUS_O_FORMAT, "emacs", (rl_editing_mode == 1) ? on : off);
+ printf (MINUS_O_FORMAT, "vi", (rl_editing_mode == 0) ? on : off);
+ }
+#endif /* READLINE */
+
+ for (i = 0; o_options[i].name; i++)
+ {
+ int *on_or_off, zero = 0;
+
+ on_or_off = find_flag (o_options[i].letter);
+ if (on_or_off == FLAG_UNKNOWN)
+ on_or_off = &zero;
+ printf (MINUS_O_FORMAT, o_options[i].name, (*on_or_off == 1) ? on : off);
+ }
+}
+
+set_minus_o_option (on_or_off, option_name)
+ int on_or_off;
+ char *option_name;
+{
+ int option_char = -1;
+
+ if (STREQ (option_name, "noclobber"))
+ {
+ if (on_or_off == FLAG_ON)
+ bind_variable ("noclobber", "");
+ else
+ unbind_variable ("noclobber");
+ stupidly_hack_special_variables ("noclobber");
+ }
+ else if (STREQ (option_name, "ignoreeof"))
+ {
+ unbind_variable ("ignoreeof");
+ unbind_variable ("IGNOREEOF");
+ if (on_or_off == FLAG_ON)
+ bind_variable ("IGNOREEOF", "10");
+ stupidly_hack_special_variables ("IGNOREEOF");
+ }
+
+#if defined (READLINE)
+ else if ((STREQ (option_name, "emacs")) || (STREQ (option_name, "vi")))
+ {
+ if (on_or_off == FLAG_ON)
+ {
+ rl_variable_bind ("editing-mode", option_name);
+
+ if (interactive)
+ with_input_from_stdin ();
+ no_line_editing = 0;
+ }
+ else
+ {
+ int isemacs = (rl_editing_mode == 1);
+ if ((isemacs && STREQ (option_name, "emacs")) ||
+ (!isemacs && STREQ (option_name, "vi")))
+ {
+ if (interactive)
+ with_input_from_stream (stdin, "stdin");
+ no_line_editing = 1;
+ }
+ else
+ builtin_error ("not in %s editing mode", option_name);
+ }
+ }
+#endif /* READLINE */
+ else if (STREQ (option_name, "interactive-comments"))
+ interactive_comments = (on_or_off == FLAG_ON);
+ else if (STREQ (option_name, "posix"))
+ {
+ posixly_correct = (on_or_off == FLAG_ON);
+ unbind_variable ("POSIXLY_CORRECT");
+ unbind_variable ("POSIX_PEDANTIC");
+ if (on_or_off == FLAG_ON)
+ {
+ bind_variable ("POSIXLY_CORRECT", "");
+ stupidly_hack_special_variables ("POSIXLY_CORRECT");
+ }
+ }
+ else
+ {
+ register int i;
+ for (i = 0; o_options[i].name; i++)
+ {
+ if (STREQ (option_name, o_options[i].name))
+ {
+ option_char = o_options[i].letter;
+ break;
+ }
+ }
+ if (option_char == -1)
+ {
+ builtin_error ("%s: unknown option name", option_name);
+ return (EXECUTION_FAILURE);
+ }
+ if (change_flag (option_char, on_or_off) == FLAG_ERROR)
+ {
+ bad_option (option_name);
+ return (EXECUTION_FAILURE);
+ }
+ }
+ return (EXECUTION_SUCCESS);
+}
+
+/* Set some flags from the word values in the input list. If LIST is empty,
+ then print out the values of the variables instead. If LIST contains
+ non-flags, then set $1 - $9 to the successive words of LIST. */
+set_builtin (list)
+ WORD_LIST *list;
+{
+ int on_or_off, flag_name, force_assignment = 0;
+
+ if (!list)
+ {
+ SHELL_VAR **vars;
+
+ vars = all_shell_variables ();
+ if (vars)
+ {
+ print_var_list (vars);
+ free (vars);
+ }
+
+ vars = all_shell_functions ();
+ if (vars)
+ {
+ print_var_list (vars);
+ free (vars);
+ }
+
+ return (EXECUTION_SUCCESS);
+ }
+
+ /* Check validity of flag arguments. */
+ if (*list->word->word == '-' || *list->word->word == '+')
+ {
+ register char *arg;
+ WORD_LIST *save_list = list;
+
+ while (list && (arg = list->word->word))
+ {
+ char c;
+
+ if (arg[0] != '-' && arg[0] != '+')
+ break;
+
+ /* `-' or `--' signifies end of flag arguments. */
+ if (arg[0] == '-' &&
+ (!arg[1] || (arg[1] == '-' && !arg[2])))
+ break;
+
+ while (c = *++arg)
+ {
+ if (find_flag (c) == FLAG_UNKNOWN && c != 'o')
+ {
+ char s[2];
+ s[0] = c; s[1] = '\0';
+ bad_option (s);
+ if (c == '?')
+ builtin_usage ();
+ return (c == '?' ? EXECUTION_SUCCESS : EXECUTION_FAILURE);
+ }
+ }
+ list = list->next;
+ }
+ list = save_list;
+ }
+
+ /* Do the set command. While the list consists of words starting with
+ '-' or '+' treat them as flags, otherwise, start assigning them to
+ $1 ... $n. */
+ while (list)
+ {
+ char *string = list->word->word;
+
+ /* If the argument is `--' or `-' then signal the end of the list
+ and remember the remaining arguments. */
+ if (string[0] == '-' && (!string[1] || (string[1] == '-' && !string[2])))
+ {
+ list = list->next;
+
+ /* `set --' unsets the positional parameters. */
+ if (string[1] == '-')
+ force_assignment = 1;
+
+ /* Until told differently, the old shell behaviour of
+ `set - [arg ...]' being equivalent to `set +xv [arg ...]'
+ stands. Posix.2 says the behaviour is marked as obsolescent. */
+ else
+ {
+ change_flag ('x', '+');
+ change_flag ('v', '+');
+ }
+
+ break;
+ }
+
+ if ((on_or_off = *string) &&
+ (on_or_off == '-' || on_or_off == '+'))
+ {
+ int i = 1;
+ while (flag_name = string[i++])
+ {
+ if (flag_name == '?')
+ {
+ builtin_usage ();
+ return (EXECUTION_SUCCESS);
+ }
+ else if (flag_name == 'o') /* -+o option-name */
+ {
+ char *option_name;
+ WORD_LIST *opt;
+
+ opt = list->next;
+
+ if (!opt)
+ {
+ list_minus_o_opts ();
+ continue;
+ }
+
+ option_name = opt->word->word;
+
+ if (!option_name || !*option_name || (*option_name == '-'))
+ {
+ list_minus_o_opts ();
+ continue;
+ }
+ list = list->next; /* Skip over option name. */
+
+ if (set_minus_o_option (on_or_off, option_name) != EXECUTION_SUCCESS)
+ return (EXECUTION_FAILURE);
+ }
+ else
+ {
+ if (change_flag (flag_name, on_or_off) == FLAG_ERROR)
+ {
+ char opt[3];
+ opt[0] = on_or_off;
+ opt[1] = flag_name;
+ opt[2] = '\0';
+ bad_option (opt);
+ builtin_usage ();
+ return (EXECUTION_FAILURE);
+ }
+ }
+ }
+ }
+ else
+ {
+ break;
+ }
+ list = list->next;
+ }
+
+ /* Assigning $1 ... $n */
+ if (list || force_assignment)
+ remember_args (list, 1);
+ return (EXECUTION_SUCCESS);
+}
+
+$BUILTIN unset
+$FUNCTION unset_builtin
+$SHORT_DOC unset [-f] [-v] [name ...]
+For each NAME, remove the corresponding variable or function. Given
+the `-v', unset will only act on variables. Given the `-f' flag,
+unset will only act on functions. With neither flag, unset first
+tries to unset a variable, and if that fails, then tries to unset a
+function. Some variables (such as PATH and IFS) cannot be unset; also
+see readonly.
+$END
+
+#define NEXT_VARIABLE() any_failed++; list = list->next; continue;
+
+unset_builtin (list)
+ WORD_LIST *list;
+{
+ int unset_function, unset_variable, unset_array, opt, any_failed;
+ char *name;
+
+ unset_function = unset_variable = unset_array = any_failed = 0;
+
+ reset_internal_getopt ();
+ while ((opt = internal_getopt (list, "fv")) != -1)
+ {
+ switch (opt)
+ {
+ case 'f':
+ unset_function = 1;
+ break;
+ case 'v':
+ unset_variable = 1;
+ break;
+ default:
+ builtin_usage ();
+ return (EXECUTION_FAILURE);
+ }
+ }
+
+ list = loptend;
+
+ if (unset_function && unset_variable)
+ {
+ builtin_error ("cannot simultaneously unset a function and a variable");
+ return (EXECUTION_FAILURE);
+ }
+
+ while (list)
+ {
+ SHELL_VAR *var;
+ int tem;
+#if defined (ARRAY_VARS)
+ char *t;
+#endif
+
+ name = list->word->word;
+
+#if defined (ARRAY_VARS)
+ if (!unset_function && valid_array_reference (name))
+ {
+ t = strchr (name, '[');
+ *t++ = '\0';
+ unset_array++;
+ }
+#endif
+
+ var = unset_function ? find_function (name) : find_variable (name);
+
+ if (var && !unset_function && non_unsettable_p (var))
+ {
+ builtin_error ("%s: cannot unset", name);
+ NEXT_VARIABLE ();
+ }
+
+ /* Posix.2 says that unsetting readonly variables is an error. */
+ if (var && readonly_p (var))
+ {
+ builtin_error ("%s: cannot unset: readonly %s",
+ name, unset_function ? "function" : "variable");
+ NEXT_VARIABLE ();
+ }
+
+ /* Unless the -f option is supplied, the name refers to a variable. */
+#if defined (ARRAY_VARS)
+ if (var && unset_array)
+ {
+ if (array_p (var) == 0)
+ {
+ builtin_error ("%s: not an array variable", name);
+ NEXT_VARIABLE ();
+ }
+ else
+ tem = unbind_array_element (var, t);
+ }
+ else
+#endif /* ARRAY_VARS */
+ tem = makunbound (name, unset_function ? shell_functions : shell_variables);
+
+ /* This is what Posix.2 draft 11+ says. ``If neither -f nor -v
+ is specified, the name refers to a variable; if a variable by
+ that name does not exist, a function by that name, if any,
+ shall be unset.'' */
+ if ((tem == -1) && !unset_function && !unset_variable)
+ tem = makunbound (name, shell_functions);
+
+ if (tem == -1)
+ any_failed++;
+ else if (!unset_function)
+ stupidly_hack_special_variables (name);
+
+ list = list->next;
+ }
+
+ if (any_failed)
+ return (EXECUTION_FAILURE);
+ else
+ return (EXECUTION_SUCCESS);
+}
--- /dev/null
+/* unwind_prot.h - Macros and functions for hacking unwind protection. */
+
+/* Copyright (C) 1993 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash is free software; you can redistribute it and/or modify it under
+ the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 2, or (at your option) any later
+ version.
+
+ Bash is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with Bash; see the file COPYING. If not, write to the Free Software
+ Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#if !defined (_UNWIND_PROT_H)
+#define _UNWIND_PROT_H
+
+/* Run a function without interrupts. */
+extern void begin_unwind_frame ();
+extern void discard_unwind_frame ();
+extern void run_unwind_frame ();
+extern void add_unwind_protect ();
+extern void remove_unwind_protect ();
+extern void run_unwind_protects ();
+extern void unwind_protect_var ();
+
+/* Define for people who like their code to look a certain way. */
+#define end_unwind_frame()
+
+/* How to protect an integer. */
+#define unwind_protect_int(X) unwind_protect_var (&(X), (char *)(X), sizeof (int))
+
+/* How to protect a pointer to a string. */
+#define unwind_protect_string(X) \
+ unwind_protect_var ((int *)&(X), (X), sizeof (char *))
+
+/* How to protect any old pointer. */
+#define unwind_protect_pointer(X) unwind_protect_string (X)
+
+/* How to protect the contents of a jmp_buf. */
+#define unwind_protect_jmp_buf(X) \
+ unwind_protect_var ((int *)(X), (char *)(X), sizeof (procenv_t))
+
+#endif /* _UNWIND_PROT_H */
@%:@! /bin/sh
@%:@ From configure.ac for Bash 4.3, version 4.063.
@%:@ Guess values for system-dependent variables and create Makefiles.
-@%:@ Generated by GNU Autoconf 2.69 for bash 4.3-release.
+@%:@ Generated by GNU Autoconf 2.69 for bash 4.3-maint.
@%:@
@%:@ Report bugs to <bug-bash@gnu.org>.
@%:@
# Identity of this package.
PACKAGE_NAME='bash'
PACKAGE_TARNAME='bash'
-PACKAGE_VERSION='4.3-release'
-PACKAGE_STRING='bash 4.3-release'
+PACKAGE_VERSION='4.3-maint'
+PACKAGE_STRING='bash 4.3-maint'
PACKAGE_BUGREPORT='bug-bash@gnu.org'
PACKAGE_URL=''
# Omit some internal or obsolete options to make the list less imposing.
# This message is too long to be a string in the A/UX 3.1 sh.
cat <<_ACEOF
-\`configure' configures bash 4.3-release to adapt to many kinds of systems.
+\`configure' configures bash 4.3-maint to adapt to many kinds of systems.
Usage: $0 [OPTION]... [VAR=VALUE]...
if test -n "$ac_init_help"; then
case $ac_init_help in
- short | recursive ) echo "Configuration of bash 4.3-release:";;
+ short | recursive ) echo "Configuration of bash 4.3-maint:";;
esac
cat <<\_ACEOF
test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
cat <<\_ACEOF
-bash configure 4.3-release
+bash configure 4.3-maint
generated by GNU Autoconf 2.69
Copyright (C) 2012 Free Software Foundation, Inc.
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
-It was created by bash $as_me 4.3-release, which was
+It was created by bash $as_me 4.3-maint, which was
generated by GNU Autoconf 2.69. Invocation command line was
$ $0 $@
BASHVERS=4.3
-RELSTATUS=release
+RELSTATUS=maint
case "$RELSTATUS" in
alp*|bet*|dev*|rc*|maint*) DEBUG='-DDEBUG' MALLOC_DEBUG='-DMALLOC_DEBUG' ;;
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
-This file was extended by bash $as_me 4.3-release, which was
+This file was extended by bash $as_me 4.3-maint, which was
generated by GNU Autoconf 2.69. Invocation command line was
CONFIG_FILES = $CONFIG_FILES
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
ac_cs_version="\\
-bash config.status 4.3-release
+bash config.status 4.3-maint
configured by $0, generated by GNU Autoconf 2.69,
with options \\"\$ac_cs_config\\"
@%:@! /bin/sh
-@%:@ From configure.ac for Bash 4.3, version 4.063.
+@%:@ From configure.in for Bash 4.2, version 4.049.
@%:@ Guess values for system-dependent variables and create Makefiles.
-@%:@ Generated by GNU Autoconf 2.69 for bash 4.3-maint.
+@%:@ Generated by GNU Autoconf 2.68 for bash 4.2-maint.
@%:@
@%:@ Report bugs to <bug-bash@gnu.org>.
@%:@
@%:@
-@%:@ Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
+@%:@ Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
+@%:@ 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software
+@%:@ Foundation, Inc.
@%:@
@%:@
@%:@ This configure script is free software; the Free Software Foundation
# CDPATH.
(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
-# Use a proper internal environment variable to ensure we don't fall
- # into an infinite loop, continuously re-executing ourselves.
- if test x"${_as_can_reexec}" != xno && test "x$CONFIG_SHELL" != x; then
- _as_can_reexec=no; export _as_can_reexec;
- # We cannot yet assume a decent shell, so we have to provide a
-# neutralization value for shells without unset; and this also
-# works around shells that cannot unset nonexistent variables.
-# Preserve -v and -x to the replacement shell.
-BASH_ENV=/dev/null
-ENV=/dev/null
-(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
-case $- in @%:@ ((((
- *v*x* | *x*v* ) as_opts=-vx ;;
- *v* ) as_opts=-v ;;
- *x* ) as_opts=-x ;;
- * ) as_opts= ;;
-esac
-exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
-# Admittedly, this is quite paranoid, since all the known shells bail
-# out after a failed `exec'.
-$as_echo "$0: could not re-execute with $CONFIG_SHELL" >&2
-as_fn_exit 255
- fi
- # We don't want this to propagate to other subprocesses.
- { _as_can_reexec=; unset _as_can_reexec;}
if test "x$CONFIG_SHELL" = x; then
as_bourne_compatible="if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then :
emulate sh
else
exitcode=1; echo positional parameters were not saved.
fi
-test x\$exitcode = x0 || exit 1
-test -x / || exit 1"
+test x\$exitcode = x0 || exit 1"
as_suggested=" as_lineno_1=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_1a=\$LINENO
as_lineno_2=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_2a=\$LINENO
eval 'test \"x\$as_lineno_1'\$as_run'\" != \"x\$as_lineno_2'\$as_run'\" &&
if test "x$CONFIG_SHELL" != x; then :
- export CONFIG_SHELL
- # We cannot yet assume a decent shell, so we have to provide a
-# neutralization value for shells without unset; and this also
-# works around shells that cannot unset nonexistent variables.
-# Preserve -v and -x to the replacement shell.
-BASH_ENV=/dev/null
-ENV=/dev/null
-(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
-case $- in @%:@ ((((
- *v*x* | *x*v* ) as_opts=-vx ;;
- *v* ) as_opts=-v ;;
- *x* ) as_opts=-x ;;
- * ) as_opts= ;;
-esac
-exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
-# Admittedly, this is quite paranoid, since all the known shells bail
-# out after a failed `exec'.
-$as_echo "$0: could not re-execute with $CONFIG_SHELL" >&2
-exit 255
+ # We cannot yet assume a decent shell, so we have to provide a
+ # neutralization value for shells without unset; and this also
+ # works around shells that cannot unset nonexistent variables.
+ # Preserve -v and -x to the replacement shell.
+ BASH_ENV=/dev/null
+ ENV=/dev/null
+ (unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
+ export CONFIG_SHELL
+ case $- in @%:@ ((((
+ *v*x* | *x*v* ) as_opts=-vx ;;
+ *v* ) as_opts=-v ;;
+ *x* ) as_opts=-x ;;
+ * ) as_opts= ;;
+ esac
+ exec "$CONFIG_SHELL" $as_opts "$as_myself" ${1+"$@"}
fi
if test x$as_have_required = xno; then :
} @%:@ as_fn_mkdir_p
-
-@%:@ as_fn_executable_p FILE
-@%:@ -----------------------
-@%:@ Test if FILE is an executable regular file.
-as_fn_executable_p ()
-{
- test -f "$1" && test -x "$1"
-} @%:@ as_fn_executable_p
@%:@ as_fn_append VAR VALUE
@%:@ ----------------------
@%:@ Append the text in VALUE to the end of the definition contained in VAR. Take
chmod +x "$as_me.lineno" ||
{ $as_echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }
- # If we had to re-execute with $CONFIG_SHELL, we're ensured to have
- # already done that, so ensure we don't try to do so again and fall
- # in an infinite loop. This has already happened in practice.
- _as_can_reexec=no; export _as_can_reexec
# Don't try to exec as it changes $[0], causing all sort of problems
# (the dirname of $[0] is not the place where we might find the
# original and so on. Autoconf is especially sensitive to this).
# ... but there are two gotchas:
# 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
# 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
- # In both cases, we have to default to `cp -pR'.
+ # In both cases, we have to default to `cp -p'.
ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
- as_ln_s='cp -pR'
+ as_ln_s='cp -p'
elif ln conf$$.file conf$$ 2>/dev/null; then
as_ln_s=ln
else
- as_ln_s='cp -pR'
+ as_ln_s='cp -p'
fi
else
- as_ln_s='cp -pR'
+ as_ln_s='cp -p'
fi
rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
rmdir conf$$.dir 2>/dev/null
as_mkdir_p=false
fi
-as_test_x='test -x'
-as_executable_p=as_fn_executable_p
+if test -x / >/dev/null 2>&1; then
+ as_test_x='test -x'
+else
+ if ls -dL / >/dev/null 2>&1; then
+ as_ls_L_option=L
+ else
+ as_ls_L_option=
+ fi
+ as_test_x='
+ eval sh -c '\''
+ if test -d "$1"; then
+ test -d "$1/.";
+ else
+ case $1 in @%:@(
+ -*)set "./$1";;
+ esac;
+ case `ls -ld'$as_ls_L_option' "$1" 2>/dev/null` in @%:@((
+ ???[sx]*):;;*)false;;esac;fi
+ '\'' sh
+ '
+fi
+as_executable_p=$as_test_x
# Sed expression to map a string onto a valid CPP name.
as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
# Identity of this package.
PACKAGE_NAME='bash'
PACKAGE_TARNAME='bash'
-PACKAGE_VERSION='4.3-maint'
-PACKAGE_STRING='bash 4.3-maint'
+PACKAGE_VERSION='4.2-maint'
+PACKAGE_STRING='bash 4.2-maint'
PACKAGE_BUGREPORT='bug-bash@gnu.org'
PACKAGE_URL=''
enable_cond_regexp
enable_coprocesses
enable_debugger
-enable_direxpand_default
enable_directory_stack
enable_disabled_builtins
enable_dparen_arithmetic
enable_extended_glob
enable_extended_glob_default
-enable_glob_asciiranges_default
enable_help_builtin
enable_history
enable_job_control
if test "x$host_alias" != x; then
if test "x$build_alias" = x; then
cross_compiling=maybe
+ $as_echo "$as_me: WARNING: if you wanted to set the --build type, don't use --host.
+ If a cross compiler is detected then cross compile mode will be used" >&2
elif test "x$build_alias" != "x$host_alias"; then
cross_compiling=yes
fi
# Omit some internal or obsolete options to make the list less imposing.
# This message is too long to be a string in the A/UX 3.1 sh.
cat <<_ACEOF
-\`configure' configures bash 4.3-maint to adapt to many kinds of systems.
+\`configure' configures bash 4.2-maint to adapt to many kinds of systems.
Usage: $0 [OPTION]... [VAR=VALUE]...
if test -n "$ac_init_help"; then
case $ac_init_help in
- short | recursive ) echo "Configuration of bash 4.3-maint:";;
+ short | recursive ) echo "Configuration of bash 4.2-maint:";;
esac
cat <<\_ACEOF
--enable-coprocesses enable coprocess support and the coproc reserved
word
--enable-debugger enable support for bash debugger
- --enable-direxpand-default
- enable the direxpand shell option by default
--enable-directory-stack
enable builtins pushd/popd/dirs
--enable-disabled-builtins
--enable-extended-glob-default
force extended pattern matching to be enabled by
default
- --enable-glob-asciiranges-default
- force bracket range expressions in pattern matching
- to use the C locale by default
--enable-help-builtin include the help builtin
--enable-history turn on command history
--enable-job-control enable job control features
test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
cat <<\_ACEOF
-bash configure 4.3-maint
-generated by GNU Autoconf 2.69
+bash configure 4.2-maint
+generated by GNU Autoconf 2.68
-Copyright (C) 2012 Free Software Foundation, Inc.
+Copyright (C) 2010 Free Software Foundation, Inc.
This configure script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it.
_ACEOF
test ! -s conftest.err
} && test -s conftest$ac_exeext && {
test "$cross_compiling" = yes ||
- test -x conftest$ac_exeext
+ $as_test_x conftest$ac_exeext
}; then :
ac_retval=0
else
main ()
{
static int test_array @<:@1 - 2 * !(($2) >= 0)@:>@;
-test_array @<:@0@:>@ = 0;
-return test_array @<:@0@:>@;
+test_array @<:@0@:>@ = 0
;
return 0;
main ()
{
static int test_array @<:@1 - 2 * !(($2) <= $ac_mid)@:>@;
-test_array @<:@0@:>@ = 0;
-return test_array @<:@0@:>@;
+test_array @<:@0@:>@ = 0
;
return 0;
main ()
{
static int test_array @<:@1 - 2 * !(($2) < 0)@:>@;
-test_array @<:@0@:>@ = 0;
-return test_array @<:@0@:>@;
+test_array @<:@0@:>@ = 0
;
return 0;
main ()
{
static int test_array @<:@1 - 2 * !(($2) >= $ac_mid)@:>@;
-test_array @<:@0@:>@ = 0;
-return test_array @<:@0@:>@;
+test_array @<:@0@:>@ = 0
;
return 0;
main ()
{
static int test_array @<:@1 - 2 * !(($2) <= $ac_mid)@:>@;
-test_array @<:@0@:>@ = 0;
-return test_array @<:@0@:>@;
+test_array @<:@0@:>@ = 0
;
return 0;
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
-It was created by bash $as_me 4.3-maint, which was
-generated by GNU Autoconf 2.69. Invocation command line was
+It was created by bash $as_me 4.2-maint, which was
+generated by GNU Autoconf 2.68. Invocation command line was
$ $0 $@
ac_config_headers="$ac_config_headers config.h"
-BASHVERS=4.3
+BASHVERS=4.2
RELSTATUS=maint
case "$RELSTATUS" in
*-mirbsd*) opt_bash_malloc=no ;; # they claim it needs eight-bit alignment
*-aix*) opt_bash_malloc=no ;; # AIX machines
*-nextstep*) opt_bash_malloc=no ;; # NeXT machines running NeXTstep
-*-openstep*) opt_bash_malloc=no ;; # i386/Sparc/HP machines running Openstep
*-macos*) opt_bash_malloc=no ;; # Apple MacOS X
*-rhapsody*) opt_bash_malloc=no ;; # Apple Rhapsody (MacOS X)
*-darwin*) opt_bash_malloc=no ;; # Apple Darwin (MacOS X)
*-beos*) opt_bash_malloc=no ;; # they say it's suitable
*-cygwin*) opt_bash_malloc=no ;; # Cygnus's CYGWIN environment
*-opennt*|*-interix*) opt_bash_malloc=no ;; # Interix, now owned by Microsoft
-*-nsk*) opt_bash_malloc=no ;; # HP NonStop
-*-haiku*) opt_bash_malloc=no ;; # Haiku OS
esac
# memory scrambling on free()
opt_casemod_attrs=yes
opt_casemod_expansions=yes
opt_extglob_default=no
-opt_dircomplete_expand_default=no
-opt_globascii_default=no
opt_static_link=no
opt_profiling=no
opt_net_redirs=no opt_progcomp=no opt_separate_help=no
opt_multibyte=yes opt_cond_regexp=no opt_coproc=no
opt_casemod_attrs=no opt_casemod_expansions=no opt_extglob_default=no
- opt_globascii_default=no
fi
@%:@ Check whether --enable-alias was given.
enableval=$enable_debugger; opt_debugger=$enableval
fi
-@%:@ Check whether --enable-direxpand-default was given.
-if test "${enable_direxpand_default+set}" = set; then :
- enableval=$enable_direxpand_default; opt_dircomplete_expand_default=$enableval
-fi
-
@%:@ Check whether --enable-directory-stack was given.
if test "${enable_directory_stack+set}" = set; then :
enableval=$enable_directory_stack; opt_dirstack=$enableval
enableval=$enable_extended_glob_default; opt_extglob_default=$enableval
fi
-@%:@ Check whether --enable-glob-asciiranges-default was given.
-if test "${enable_glob_asciiranges_default+set}" = set; then :
- enableval=$enable_glob_asciiranges_default; opt_globascii_default=$enableval
-fi
-
@%:@ Check whether --enable-help-builtin was given.
if test "${enable_help_builtin+set}" = set; then :
enableval=$enable_help_builtin; opt_help=$enableval
if test $opt_casemod_expansions = yes; then
$as_echo "@%:@define CASEMOD_EXPANSIONS 1" >>confdefs.h
-fi
-if test $opt_dircomplete_expand_default = yes; then
-$as_echo "@%:@define DIRCOMPLETE_EXPAND_DEFAULT 1" >>confdefs.h
-
-fi
-if test $opt_globascii_default = yes; then
-$as_echo "@%:@define GLOBASCII_DEFAULT 1" >>confdefs.h
-
-else
-$as_echo "@%:@define GLOBASCII_DEFAULT 0" >>confdefs.h
-
fi
if test $opt_memscramble = yes; then
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
ac_cv_prog_CC="${ac_tool_prefix}gcc"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
ac_cv_prog_ac_ct_CC="gcc"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
ac_cv_prog_CC="${ac_tool_prefix}cc"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
ac_prog_rejected=yes
continue
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
ac_cv_prog_ac_ct_CC="$ac_prog"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
/* end confdefs.h. */
#include <stdarg.h>
#include <stdio.h>
-struct stat;
+#include <sys/types.h>
+#include <sys/stat.h>
/* Most of the following tests are stolen from RCS 5.7's src/conf.sh. */
struct buf { int x; };
FILE * (*rcsopen) (struct buf *, struct stat *, int);
for ac_prog in grep ggrep; do
for ac_exec_ext in '' $ac_executable_extensions; do
ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
- as_fn_executable_p "$ac_path_GREP" || continue
+ { test -f "$ac_path_GREP" && $as_test_x "$ac_path_GREP"; } || continue
# Check for GNU ac_path_GREP and select it if it is found.
# Check for GNU $ac_path_GREP
case `"$ac_path_GREP" --version 2>&1` in
for ac_prog in egrep; do
for ac_exec_ext in '' $ac_executable_extensions; do
ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
- as_fn_executable_p "$ac_path_EGREP" || continue
+ { test -f "$ac_path_EGREP" && $as_test_x "$ac_path_EGREP"; } || continue
# Check for GNU ac_path_EGREP and select it if it is found.
# Check for GNU $ac_path_EGREP
case `"$ac_path_EGREP" --version 2>&1` in
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-# define __EXTENSIONS__ 1
- $ac_includes_default
+# define __EXTENSIONS__ 1
+ $ac_includes_default
int
main ()
{
esac
rm -rf conftest*
fi
-
-
fi
# by default.
for ac_prog in ginstall scoinst install; do
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_prog$ac_exec_ext"; then
+ if { test -f "$as_dir/$ac_prog$ac_exec_ext" && $as_test_x "$as_dir/$ac_prog$ac_exec_ext"; }; then
if test $ac_prog = install &&
grep dspmsg "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
# AIX install. It has an incompatible calling convention.
test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
-if test -n "$ac_tool_prefix"; then
- # Extract the first word of "${ac_tool_prefix}ar", so it can be a program name with args.
-set dummy ${ac_tool_prefix}ar; ac_word=$2
+# Extract the first word of "ar", so it can be a program name with args.
+set dummy ar; ac_word=$2
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
$as_echo_n "checking for $ac_word... " >&6; }
if ${ac_cv_prog_AR+:} false; then :
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
- ac_cv_prog_AR="${ac_tool_prefix}ar"
+ if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+ ac_cv_prog_AR=""
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
fi
done
IFS=$as_save_IFS
+ test -z "$ac_cv_prog_AR" && ac_cv_prog_AR="ar"
fi
fi
AR=$ac_cv_prog_AR
fi
-fi
-if test -z "$ac_cv_prog_AR"; then
- ac_ct_AR=$AR
- # Extract the first word of "ar", so it can be a program name with args.
-set dummy ar; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_AR+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- if test -n "$ac_ct_AR"; then
- ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
- IFS=$as_save_IFS
- test -z "$as_dir" && as_dir=.
- for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
- ac_cv_prog_ac_ct_AR="ar"
- $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
- break 2
- fi
-done
- done
-IFS=$as_save_IFS
-
-fi
-fi
-ac_ct_AR=$ac_cv_prog_ac_ct_AR
-if test -n "$ac_ct_AR"; then
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
-$as_echo "$ac_ct_AR" >&6; }
-else
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
- if test "x$ac_ct_AR" = x; then
- AR=""
- else
- case $cross_compiling:$ac_tool_warned in
-yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
-ac_tool_warned=yes ;;
-esac
- AR=$ac_ct_AR
- fi
-else
- AR="$ac_cv_prog_AR"
-fi
-
test -n "$ARFLAGS" || ARFLAGS="cr"
if test -n "$ac_tool_prefix"; then
# Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args.
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
ac_cv_prog_ac_ct_RANLIB="ranlib"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
ac_cv_prog_YACC="$ac_prog"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
fi
-case "$ac_cv_prog_YACC" in
-*bison*) ;;
-*) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: bison not available; needed to process parse.y" >&5
-$as_echo "$as_me: WARNING: bison not available; needed to process parse.y" >&2;} ;;
-esac
-
case "$host_os" in
opennt*|interix*) MAKE_SHELL="$INTERIX_ROOT/bin/sh" ;;
*) MAKE_SHELL=/bin/sh ;;
int
main ()
{
-
+/* FIXME: Include the comments suggested by Paul. */
#ifndef __cplusplus
- /* Ultrix mips cc rejects this sort of thing. */
+ /* Ultrix mips cc rejects this. */
typedef int charset[2];
- const charset cs = { 0, 0 };
+ const charset cs;
/* SunOS 4.1.1 cc rejects this. */
char const *const *pcpcc;
char **ppc;
++pcpcc;
ppc = (char**) pcpcc;
pcpcc = (char const *const *) ppc;
- { /* SCO 3.2v4 cc rejects this sort of thing. */
- char tx;
- char *t = &tx;
+ { /* SCO 3.2v4 cc rejects this. */
+ char *t;
char const *s = 0 ? (char *) 0 : (char const *) 0;
*t++ = 0;
iptr p = 0;
++p;
}
- { /* AIX XL C 1.02.0.0 rejects this sort of thing, saying
+ { /* AIX XL C 1.02.0.0 rejects this saying
"k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
- struct s { int j; const int *ap[3]; } bx;
- struct s *b = &bx; b->j = 5;
+ struct s { int j; const int *ap[3]; };
+ struct s *b; b->j = 5;
}
{ /* ULTRIX-32 V3.1 (Rev 9) vcc rejects this */
const int foo = 10;
- (LDBL_MANT_DIG < DBL_MANT_DIG)))
&& (int) LDBL_EPSILON == 0
)@:>@;
-test_array @<:@0@:>@ = 0;
-return test_array @<:@0@:>@;
+test_array @<:@0@:>@ = 0
;
return 0;
main ()
{
static int test_array @<:@1 - 2 * !(((char) -1) < 0)@:>@;
-test_array @<:@0@:>@ = 0;
-return test_array @<:@0@:>@;
+test_array @<:@0@:>@ = 0
;
return 0;
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
ac_cv_path_GMSGFMT="$as_dir/$ac_word$ac_exec_ext"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
/* end confdefs.h. */
$ac_includes_default
int
-find_stack_direction (int *addr, int depth)
+find_stack_direction ()
{
- int dir, dummy = 0;
- if (! addr)
- addr = &dummy;
- *addr = addr < &dummy ? 1 : addr == &dummy ? 0 : -1;
- dir = depth ? find_stack_direction (addr, depth - 1) : 0;
- return dir + dummy;
+ static char *addr = 0;
+ auto char dummy;
+ if (addr == 0)
+ {
+ addr = &dummy;
+ return find_stack_direction ();
+ }
+ else
+ return (&dummy > addr) ? 1 : -1;
}
int
-main (int argc, char **argv)
+main ()
{
- return find_stack_direction (0, argc + !argv + 20) < 0;
+ return find_stack_direction () < 0;
}
_ACEOF
if ac_fn_c_try_run "$LINENO"; then :
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
- if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
ac_cv_prog_INTLBISON="$ac_prog"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
/* end confdefs.h. */
$ac_includes_default
int
-find_stack_direction (int *addr, int depth)
+find_stack_direction ()
{
- int dir, dummy = 0;
- if (! addr)
- addr = &dummy;
- *addr = addr < &dummy ? 1 : addr == &dummy ? 0 : -1;
- dir = depth ? find_stack_direction (addr, depth - 1) : 0;
- return dir + dummy;
+ static char *addr = 0;
+ auto char dummy;
+ if (addr == 0)
+ {
+ addr = &dummy;
+ return find_stack_direction ();
+ }
+ else
+ return (&dummy > addr) ? 1 : -1;
}
int
-main (int argc, char **argv)
+main ()
{
- return find_stack_direction (0, argc + !argv + 20) < 0;
+ return find_stack_direction () < 0;
}
_ACEOF
if ac_fn_c_try_run "$LINENO"; then :
fi
-ac_fn_c_check_func "$LINENO" "strdup" "ac_cv_func_strdup"
-if test "x$ac_cv_func_strdup" = xyes; then :
- $as_echo "@%:@define HAVE_STRDUP 1" >>confdefs.h
-
-else
- case " $LIB@&t@OBJS " in
- *" strdup.$ac_objext "* ) ;;
- *) LIB@&t@OBJS="$LIB@&t@OBJS strdup.$ac_objext"
- ;;
-esac
-
-fi
-
-
ac_fn_c_check_decl "$LINENO" "AUDIT_USER_TTY" "ac_cv_have_decl_AUDIT_USER_TTY" "#include <linux/audit.h>
"
rm -f conftest.mmap conftest.txt
for ac_func in __argz_count __argz_next __argz_stringify dcgettext mempcpy \
- munmap stpcpy strcspn
+ munmap stpcpy strcspn strdup
do :
as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
$as_echo_n "(cached) " >&6
else
if test "$cross_compiling" = yes; then :
- bash_cv_wcwidth_broken=no
+ { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot run test program while cross compiling
+See \`config.log' for more details" "$LINENO" 5; }
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
if ac_fn_c_try_run "$LINENO"; then :
bash_cv_wcwidth_broken=yes
else
- bash_cv_wcwidth_broken=no
+ bash_cv_wcwdith_broken=no
fi
rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
conftest.$ac_objext conftest.beam conftest.$ac_ext
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $bash_cv_wcwidth_broken" >&5
$as_echo "$bash_cv_wcwidth_broken" >&6; }
-if test "$bash_cv_wcwidth_broken" = yes; then
+if test $bash_cv_wcwidth_broken = yes; then
$as_echo "@%:@define WCWIDTH_BROKEN 1" >>confdefs.h
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sig_atomic_t" >&5
-$as_echo_n "checking for sig_atomic_t... " >&6; }
-if ${bash_cv_type_sig_atomic_t+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-#include <sys/types.h>
-#if STDC_HEADERS
-#include <stdlib.h>
-#include <stddef.h>
-#endif
-#if HAVE_INTTYPES_H
-#include <inttypes.h>
-#endif
-#if HAVE_STDINT_H
-#include <stdint.h>
-#endif
-#include <signal.h>
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
- $EGREP "sig_atomic_t" >/dev/null 2>&1; then :
- bash_cv_type_sig_atomic_t=yes
-else
- bash_cv_type_sig_atomic_t=no
-fi
-rm -f conftest*
-
-fi
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $bash_cv_type_sig_atomic_t" >&5
-$as_echo "$bash_cv_type_sig_atomic_t" >&6; }
-
-if test $bash_cv_type_sig_atomic_t = no; then
- cat >>confdefs.h <<_ACEOF
-@%:@define sig_atomic_t int
-_ACEOF
-
-fi
-
-
-
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for quad_t" >&5
$as_echo_n "checking for quad_t... " >&6; }
if ${bash_cv_type_quad_t+:} false; then :
fi
if test $bash_cv_type_socklen_t = no; then
cat >>confdefs.h <<_ACEOF
-@%:@define socklen_t unsigned int
+@%:@define socklen_t int
_ACEOF
fi
powerux*) LOCAL_LIBS="-lgen" ;;
cygwin*) LOCAL_CFLAGS=-DRECYCLES_PIDS ;;
opennt*|interix*) LOCAL_CFLAGS="-DNO_MAIN_ENV_ARG -DBROKEN_DIRENT_D_INO -D_POSIX_SOURCE -D_ALL_SOURCE -DRECYCLES_PIDS" ;;
-*openstep*) LOCAL_CFLAGS="-D__APPLE_CC__" ;;
esac
case "${host_os}-${CC}" in
# ... but there are two gotchas:
# 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
# 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
- # In both cases, we have to default to `cp -pR'.
+ # In both cases, we have to default to `cp -p'.
ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
- as_ln_s='cp -pR'
+ as_ln_s='cp -p'
elif ln conf$$.file conf$$ 2>/dev/null; then
as_ln_s=ln
else
- as_ln_s='cp -pR'
+ as_ln_s='cp -p'
fi
else
- as_ln_s='cp -pR'
+ as_ln_s='cp -p'
fi
rm -f conf$$ conf$$.exe conf$$.dir/conf$$.file conf$$.file
rmdir conf$$.dir 2>/dev/null
as_mkdir_p=false
fi
-
-@%:@ as_fn_executable_p FILE
-@%:@ -----------------------
-@%:@ Test if FILE is an executable regular file.
-as_fn_executable_p ()
-{
- test -f "$1" && test -x "$1"
-} @%:@ as_fn_executable_p
-as_test_x='test -x'
-as_executable_p=as_fn_executable_p
+if test -x / >/dev/null 2>&1; then
+ as_test_x='test -x'
+else
+ if ls -dL / >/dev/null 2>&1; then
+ as_ls_L_option=L
+ else
+ as_ls_L_option=
+ fi
+ as_test_x='
+ eval sh -c '\''
+ if test -d "$1"; then
+ test -d "$1/.";
+ else
+ case $1 in @%:@(
+ -*)set "./$1";;
+ esac;
+ case `ls -ld'$as_ls_L_option' "$1" 2>/dev/null` in @%:@((
+ ???[sx]*):;;*)false;;esac;fi
+ '\'' sh
+ '
+fi
+as_executable_p=$as_test_x
# Sed expression to map a string onto a valid CPP name.
as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
-This file was extended by bash $as_me 4.3-maint, which was
-generated by GNU Autoconf 2.69. Invocation command line was
+This file was extended by bash $as_me 4.2-maint, which was
+generated by GNU Autoconf 2.68. Invocation command line was
CONFIG_FILES = $CONFIG_FILES
CONFIG_HEADERS = $CONFIG_HEADERS
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
ac_cs_version="\\
-bash config.status 4.3-maint
-configured by $0, generated by GNU Autoconf 2.69,
+bash config.status 4.2-maint
+configured by $0, generated by GNU Autoconf 2.68,
with options \\"\$ac_cs_config\\"
-Copyright (C) 2012 Free Software Foundation, Inc.
+Copyright (C) 2010 Free Software Foundation, Inc.
This config.status script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it."
_ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
if \$ac_cs_recheck; then
- set X $SHELL '$0' $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion
+ set X '$SHELL' '$0' $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion
shift
\$as_echo "running CONFIG_SHELL=$SHELL \$*" >&6
CONFIG_SHELL='$SHELL'
--- /dev/null
+@%:@! /bin/sh
'_AM_COND_ELSE' => 1,
'AC_SUBST_TRACE' => 1
}
- ], 'Autom4te::Request' ),
- bless( [
- '1',
- 1,
- [
- '/opt/local/share/autoconf'
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- [
- '/opt/local/share/autoconf/autoconf/autoconf.m4f',
- 'aclocal.m4',
- 'configure.ac'
- ],
- {
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);
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You should run autoupdate.], [])
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--- /dev/null
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+m4trace:configure.ac:29: -1- AC_SUBST([mandir], ['${prefix}/man'])
+m4trace:configure.ac:29: -1- AC_DEFINE_TRACE_LITERAL([PACKAGE_NAME])
+m4trace:configure.ac:29: -1- AH_OUTPUT([PACKAGE_NAME], [/* Define to the full name of this package. */
+#undef PACKAGE_NAME])
+m4trace:configure.ac:29: -1- AC_DEFINE_TRACE_LITERAL([PACKAGE_TARNAME])
+m4trace:configure.ac:29: -1- AH_OUTPUT([PACKAGE_TARNAME], [/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME])
+m4trace:configure.ac:29: -1- AC_DEFINE_TRACE_LITERAL([PACKAGE_VERSION])
+m4trace:configure.ac:29: -1- AH_OUTPUT([PACKAGE_VERSION], [/* Define to the version of this package. */
+#undef PACKAGE_VERSION])
+m4trace:configure.ac:29: -1- AC_DEFINE_TRACE_LITERAL([PACKAGE_STRING])
+m4trace:configure.ac:29: -1- AH_OUTPUT([PACKAGE_STRING], [/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING])
+m4trace:configure.ac:29: -1- AC_DEFINE_TRACE_LITERAL([PACKAGE_BUGREPORT])
+m4trace:configure.ac:29: -1- AH_OUTPUT([PACKAGE_BUGREPORT], [/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT])
+m4trace:configure.ac:29: -1- AC_SUBST([build_alias])
+m4trace:configure.ac:29: -1- AC_SUBST([host_alias])
+m4trace:configure.ac:29: -1- AC_SUBST([target_alias])
+m4trace:configure.ac:29: -1- AC_SUBST([DEFS])
+m4trace:configure.ac:29: -1- AC_SUBST([ECHO_C])
+m4trace:configure.ac:29: -1- AC_SUBST([ECHO_N])
+m4trace:configure.ac:29: -1- AC_SUBST([ECHO_T])
+m4trace:configure.ac:29: -1- AC_SUBST([LIBS])
--- /dev/null
+This file is return.def, from which is created return.c.
+It implements the builtin "return" in Bash.
+
+Copyright (C) 1987-2009 Free Software Foundation, Inc.
+
+This file is part of GNU Bash, the Bourne Again SHell.
+
+Bash is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Bash is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Bash. If not, see <http://www.gnu.org/licenses/>.
+
+$PRODUCES return.c
+
+$BUILTIN return
+
+$FUNCTION return_builtin
+$SHORT_DOC return [n]
+Return from a shell function.
+
+Causes a function or sourced script to exit with the return value
+specified by N. If N is omitted, the return status is that of the
+last command executed within the function or script.
+
+Exit Status:
+Returns N, or failure if the shell is not executing a function or script.
+$END
+
+#include <config.h>
+
+#if defined (HAVE_UNISTD_H)
+# ifdef _MINIX
+# include <sys/types.h>
+# endif
+# include <unistd.h>
+#endif
+
+#include "../bashintl.h"
+
+#include "../shell.h"
+#include "common.h"
+#include "bashgetopt.h"
+
+extern int last_command_exit_value;
+extern int subshell_environment;
+extern int return_catch_flag, return_catch_value;
+extern int running_trap;
+
+/* If we are executing a user-defined function then exit with the value
+ specified as an argument. if no argument is given, then the last
+ exit status is used. */
+int
+return_builtin (list)
+ WORD_LIST *list;
+{
+#if 0
+ if (no_options (list))
+ return (EX_USAGE);
+ list = loptend; /* skip over possible `--' */
+#endif
+
+itrace("return_builtin: running_trap = %d", running_trap);
+ return_catch_value = get_exitstat (list);
+
+ if (return_catch_flag)
+ longjmp (return_catch, 1);
+ else
+ {
+ builtin_error (_("can only `return' from a function or sourced script"));
+ return (EXECUTION_FAILURE);
+ }
+}
--- /dev/null
+# This file is a shell script that caches the results of configure
+# tests for CYGWIN32 so they don't need to be done when cross-compiling.
+
+# AC_FUNC_GETPGRP should also define GETPGRP_VOID
+ac_cv_func_getpgrp_void=${ac_cv_func_getpgrp_void='yes'}
+# AC_FUNC_SETVBUF_REVERSED should not define anything else
+ac_cv_func_setvbuf_reversed=${ac_cv_func_setvbuf_reversed='no'}
+# on CYGWIN32, system calls do not restart
+ac_cv_sys_restartable_syscalls=${ac_cv_sys_restartable_syscalls='no'}
+bash_cv_sys_restartable_syscalls=${bash_cv_sys_restartable_syscalls='no'}
+
+# these may be necessary, but they are currently commented out
+#ac_cv_c_bigendian=${ac_cv_c_bigendian='no'}
+ac_cv_sizeof_char_p=${ac_cv_sizeof_char_p='4'}
+ac_cv_sizeof_int=${ac_cv_sizeof_int='4'}
+ac_cv_sizeof_long=${ac_cv_sizeof_long='4'}
+ac_cv_sizeof_double=${ac_cv_sizeof_double='8'}
+
+bash_cv_dup2_broken=${bash_cv_dup2_broken='no'}
+bash_cv_pgrp_pipe=${bash_cv_pgrp_pipe='no'}
+bash_cv_type_rlimit=${bash_cv_type_rlimit='long'}
+bash_cv_decl_under_sys_siglist=${bash_cv_decl_under_sys_siglist='no'}
+bash_cv_under_sys_siglist=${bash_cv_under_sys_siglist='no'}
+bash_cv_sys_siglist=${bash_cv_sys_siglist='no'}
+bash_cv_opendir_not_robust=${bash_cv_opendir_not_robust='no'}
+bash_cv_getenv_redef=${bash_cv_getenv_redef='yes'}
+bash_cv_printf_declared=${bash_cv_printf_declared='yes'}
+bash_cv_ulimit_maxfds=${bash_cv_ulimit_maxfds='no'}
+bash_cv_getcwd_calls_popen=${bash_cv_getcwd_calls_popen='no'}
+bash_cv_must_reinstall_sighandlers=${bash_cv_must_reinstall_sighandlers='no'}
+bash_cv_job_control_missing=${bash_cv_job_control_missing='present'}
+bash_cv_sys_named_pipes=${bash_cv_sys_named_pipes='missing'}
+bash_cv_func_sigsetjmp=${bash_cv_func_sigsetjmp='missing'}
+bash_cv_mail_dir=${bash_cv_mail_dir='unknown'}
+bash_cv_func_strcoll_broken=${bash_cv_func_strcoll_broken='no'}
+
+bash_cv_type_int32_t=${bash_cv_type_int32_t='int'}
+bash_cv_type_u_int32_t=${bash_cv_type_u_int32_t='int'}
+
+ac_cv_type_bits64_t=${ac_cv_type_bits64_t='no'}
+
+# end of cross-build/cygwin32.cache
--- /dev/null
+This is the Bash FAQ, version 3.24, for Bash version 2.05b.
+
+This document contains a set of frequently-asked questions concerning
+Bash, the GNU Bourne-Again Shell. Bash is a freely-available command
+interpreter with advanced features for both interactive use and shell
+programming.
+
+Another good source of basic information about shells is the collection
+of FAQ articles periodically posted to comp.unix.shell.
+
+Questions and comments concerning this document should be sent to
+chet@po.cwru.edu.
+
+This document is available for anonymous FTP with the URL
+
+ftp://ftp.cwru.edu/pub/bash/FAQ
+
+The Bash home page is http://cnswww.cns.cwru.edu/~chet/bash/bashtop.html
+
+----------
+Contents:
+
+Section A: The Basics
+
+A1) What is it?
+A2) What's the latest version?
+A3) Where can I get it?
+A4) On what machines will bash run?
+A5) Will bash run on operating systems other than Unix?
+A6) How can I build bash with gcc?
+A7) How can I make bash my login shell?
+A8) I just changed my login shell to bash, and now I can't FTP into my
+ machine. Why not?
+A9) What's the `POSIX 1003.2 standard'?
+A10) What is the bash `posix mode'?
+
+Section B: The latest version
+
+B1) What's new in version 2.05b?
+B2) Are there any user-visible incompatibilities between bash-2.05b and
+ bash-1.14.7?
+
+Section C: Differences from other Unix shells
+
+C1) How does bash differ from sh, the Bourne shell?
+C2) How does bash differ from the Korn shell, version ksh88?
+C3) Which new features in ksh-93 are not in bash, and which are?
+
+Section D: Why does bash do some things differently than other Unix shells?
+
+D1) Why does bash run a different version of `command' than
+ `which command' says it will?
+D2) Why doesn't bash treat brace expansions exactly like csh?
+D3) Why doesn't bash have csh variable modifiers?
+D4) How can I make my csh aliases work when I convert to bash?
+D5) How can I pipe standard output and standard error from one command to
+ another, like csh does with `|&'?
+D6) Now that I've converted from ksh to bash, are there equivalents to
+ ksh features like autoloaded functions and the `whence' command?
+
+Section E: Why does bash do certain things the way it does?
+
+E1) Why is the bash builtin `test' slightly different from /bin/test?
+E2) Why does bash sometimes say `Broken pipe'?
+E3) When I have terminal escape sequences in my prompt, why does bash
+ wrap lines at the wrong column?
+E4) If I pipe the output of a command into `read variable', why doesn't
+ the output show up in $variable when the read command finishes?
+E5) I have a bunch of shell scripts that use backslash-escaped characters
+ in arguments to `echo'. Bash doesn't interpret these characters. Why
+ not, and how can I make it understand them?
+E6) Why doesn't a while or for loop get suspended when I type ^Z?
+E7) What about empty for loops in Makefiles?
+E8) Why does the arithmetic evaluation code complain about `08'?
+E9) Why does the pattern matching expression [A-Z]* match files beginning
+ with every letter except `z'?
+E10) Why does `cd //' leave $PWD as `//'?
+E11) If I resize my xterm while another program is running, why doesn't bash
+ notice the change?
+
+Section F: Things to watch out for on certain Unix versions
+
+F1) Why can't I use command line editing in my `cmdtool'?
+F2) I built bash on Solaris 2. Why do globbing expansions and filename
+ completion chop off the first few characters of each filename?
+F3) Why does bash dump core after I interrupt username completion or
+ `~user' tilde expansion on a machine running NIS?
+F4) I'm running SVR4.2. Why is the line erased every time I type `@'?
+F5) Why does bash report syntax errors when my C News scripts use a
+ redirection before a subshell command?
+F6) Why can't I use vi-mode editing on Red Hat Linux 6.1?
+F7) Why do bash-2.05a and bash-2.05b fail to compile `printf.def' on
+ HP/UX 11.x?
+
+Section G: How can I get bash to do certain common things?
+
+G1) How can I get bash to read and display eight-bit characters?
+G2) How do I write a function `x' to replace builtin command `x', but
+ still invoke the command from within the function?
+G3) How can I find the value of a shell variable whose name is the value
+ of another shell variable?
+G4) How can I make the bash `time' reserved word print timing output that
+ looks like the output from my system's /usr/bin/time?
+G5) How do I get the current directory into my prompt?
+G6) How can I rename "*.foo" to "*.bar"?
+G7) How can I translate a filename from uppercase to lowercase?
+G8) How can I write a filename expansion (globbing) pattern that will match
+ all files in the current directory except "." and ".."?
+
+Section H: Where do I go from here?
+
+H1) How do I report bugs in bash, and where should I look for fixes and
+ advice?
+H2) What kind of bash documentation is there?
+H3) What's coming in future versions?
+H4) What's on the bash `wish list'?
+H5) When will the next release appear?
+
+----------
+Section A: The Basics
+
+A1) What is it?
+
+Bash is a Unix command interpreter (shell). It is an implementation of
+the Posix 1003.2 shell standard, and resembles the Korn and System V
+shells.
+
+Bash contains a number of enhancements over those shells, both
+for interactive use and shell programming. Features geared
+toward interactive use include command line editing, command
+history, job control, aliases, and prompt expansion. Programming
+features include additional variable expansions, shell
+arithmetic, and a number of variables and options to control
+shell behavior.
+
+Bash was originally written by Brian Fox of the Free Software
+Foundation. The current developer and maintainer is Chet Ramey
+of Case Western Reserve University.
+
+A2) What's the latest version?
+
+The latest version is 2.05b, first made available on Wednesday, 17
+July, 2002.
+
+A3) Where can I get it?
+
+Bash is the GNU project's shell, and so is available from the
+master GNU archive site, ftp.gnu.org, and its mirrors. The
+latest version is also available for FTP from ftp.cwru.edu.
+The following URLs tell how to get version 2.05b:
+
+ftp://ftp.gnu.org/pub/gnu/bash/bash-2.05b.tar.gz
+ftp://ftp.cwru.edu/pub/bash/bash-2.05b.tar.gz
+
+Formatted versions of the documentation are available with the URLs:
+
+ftp://ftp.gnu.org/pub/gnu/bash/bash-doc-2.05b.tar.gz
+ftp://ftp.cwru.edu/pub/bash/bash-doc-2.05b.tar.gz
+
+A4) On what machines will bash run?
+
+Bash has been ported to nearly every version of UNIX. All you
+should have to do to build it on a machine for which a port
+exists is to type `configure' and then `make'. The build process
+will attempt to discover the version of UNIX you have and tailor
+itself accordingly, using a script created by GNU autoconf.
+
+More information appears in the file `INSTALL' in the distribution.
+
+The Bash web page (http://cnswww.cns.cwru.edu/~chet/bash/bashtop.html)
+explains how to obtain binary versions of bash for most of the major
+commercial Unix systems.
+
+A5) Will bash run on operating systems other than Unix?
+
+Configuration specifics for Unix-like systems such as QNX and
+LynxOS are included in the distribution. Bash-2.05 and later
+versions should compile and run on Minix 2.0 (patches were
+contributed), but I don't believe anyone has built bash-2.x on
+earlier Minix versions yet.
+
+Bash has been ported to versions of Windows implementing the Win32
+programming interface. This includes Windows 95 and Windows NT.
+The port was done by Cygnus Solutions as part of their CYGWIN
+project. For more information about the project, look at the URLs
+
+http://www.cygwin.com/
+http://sourceware.cygnus.com/cygwin
+
+Cygnus originally ported bash-1.14.7, and that port was part of their
+early GNU-Win32 (the original name) releases. Cygnus has also done a
+port of bash-2.05 to the CYGWIN environment, and it is available as
+part of their current release.
+
+Bash-2.05b should require no local Cygnus changes to build and run under
+CYGWIN.
+
+The Cygnus port works only on Intel machines. There is a port of bash
+(I don't know which version) to the alpha/NT environment available from
+
+ftp://ftp.gnustep.org//pub/win32/bash-alpha-nt-1.01.tar.gz
+
+DJ Delorie has a port of bash-2.x which runs under MS-DOS, as part
+of the DJGPP project. For more information on the project, see
+
+http://www.delorie.com/djgpp/
+
+I have been told that the original DJGPP port was done by Daisuke Aoyama.
+
+Mark Elbrecht <snowball3@bigfoot.com> has sent me notice that bash-2.04
+is available for DJGPP V2. The files are available as:
+
+ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bsh204b.zip binary
+ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bsh204d.zip documentation
+ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bsh204s.zip source
+
+Mark has begun to work with bash-2.05, but I don't know the status.
+
+Ports of bash-1.12 and bash-2.0 are available for OS/2 from
+
+ftp://hobbes.nmsu.edu/pub/os2/util/shell/bash_112.zip
+ftp://hobbes.nmsu.edu/pub/os2/util/shell/bash-2.0(253).zip
+
+I haven't looked at either, but the second appears to be a binary-only
+distribution. Beware.
+
+I have received word that Bash (I'm not sure which version, but I
+believe that it's at least bash-2.02.1) is the standard shell on
+BeOS.
+
+A6) How can I build bash with gcc?
+
+Bash configures to use gcc by default if it is available. Read the
+file INSTALL in the distribution for more information.
+
+A7) How can I make bash my login shell?
+
+Some machines let you use `chsh' to change your login shell. Other
+systems use `passwd -s' or `passwd -e'. If one of these works for
+you, that's all you need. Note that many systems require the full
+pathname to a shell to appear in /etc/shells before you can make it
+your login shell. For this, you may need the assistance of your
+friendly local system administrator.
+
+If you cannot do this, you can still use bash as your login shell, but
+you need to perform some tricks. The basic idea is to add a command
+to your login shell's startup file to replace your login shell with
+bash.
+
+For example, if your login shell is csh or tcsh, and you have installed
+bash in /usr/gnu/bin/bash, add the following line to ~/.login:
+
+ if ( -f /usr/gnu/bin/bash ) exec /usr/gnu/bin/bash --login
+
+(the `--login' tells bash that it is a login shell).
+
+It's not a good idea to put this command into ~/.cshrc, because every
+csh you run without the `-f' option, even ones started to run csh scripts,
+reads that file. If you must put the command in ~/.cshrc, use something
+like
+
+ if ( $?prompt ) exec /usr/gnu/bin/bash --login
+
+to ensure that bash is exec'd only when the csh is interactive.
+
+If your login shell is sh or ksh, you have to do two things.
+
+First, create an empty file in your home directory named `.bash_profile'.
+The existence of this file will prevent the exec'd bash from trying to
+read ~/.profile, and re-execing itself over and over again. ~/.bash_profile
+is the first file bash tries to read initialization commands from when
+it is invoked as a login shell.
+
+Next, add a line similar to the above to ~/.profile:
+
+ [ -f /usr/gnu/bin/bash ] && [ -x /usr/gnu/bin/bash ] && \
+ exec /usr/gnu/bin/bash --login
+
+This will cause login shells to replace themselves with bash running as
+a login shell. Once you have this working, you can copy your initialization
+code from ~/.profile to ~/.bash_profile.
+
+I have received word that the recipe supplied above is insufficient for
+machines running CDE. CDE has a maze of twisty little startup files, all
+slightly different.
+
+If you cannot change your login shell in the password file to bash, you
+will have to (apparently) live with CDE using the shell in the password
+file to run its startup scripts. If you have changed your shell to bash,
+there is code in the CDE startup files (on Solaris, at least) that attempts
+to do the right thing. It is, however, often broken, and may require that
+you use the $BASH_ENV trick described below.
+
+`dtterm' claims to use $SHELL as the default program to start, so if you
+can change $SHELL in the CDE startup files, you should be able to use bash
+in your terminal windows.
+
+Setting DTSOURCEPROFILE in ~/.dtprofile will cause the `Xsession' program
+to read your login shell's startup files. You may be able to use bash for
+the rest of the CDE programs by setting SHELL to bash in ~/.dtprofile as
+well, but I have not tried this.
+
+You can use the above `exec' recipe to start bash when not logging in with
+CDE by testing the value of the DT variable:
+
+ if [ -n "$DT" ]; then
+ [ -f /usr/gnu/bin/bash ] && exec /usr/gnu/bin/bash --login
+ fi
+
+If CDE starts its shells non-interactively during login, the login shell
+startup files (~/.profile, ~/.bash_profile) will not be sourced at login.
+To get around this problem, append a line similar to the following to your
+~/.dtprofile:
+
+ BASH_ENV=${HOME}/.bash_profile ; export BASH_ENV
+
+and add the following line to the beginning of ~/.bash_profile:
+
+ unset BASH_ENV
+
+A8) I just changed my login shell to bash, and now I can't FTP into my
+ machine. Why not?
+
+You must add the full pathname to bash to the file /etc/shells. As
+noted in the answer to the previous question, many systems require
+this before you can make bash your login shell.
+
+Most versions of ftpd use this file to prohibit `special' users
+such as `uucp' and `news' from using FTP.
+
+A9) What's the `POSIX 1003.2 standard'?
+
+POSIX is a name originally coined by Richard Stallman for a
+family of open system standards based on UNIX. There are a
+number of aspects of UNIX under consideration for
+standardization, from the basic system services at the system
+call and C library level to applications and tools to system
+administration and management. Each area of standardization is
+assigned to a working group in the 1003 series.
+
+The POSIX Shell and Utilities standard has been developed by IEEE
+Working Group 1003.2 (POSIX.2). It concentrates on the command
+interpreter interface and utility programs commonly executed from
+the command line or by other programs. An initial version of the
+standard has been approved and published by the IEEE, and work is
+currently underway to update it.
+
+Bash is concerned with the aspects of the shell's behavior
+defined by POSIX.2. The shell command language has of course
+been standardized, including the basic flow control and program
+execution constructs, I/O redirection and pipelining, argument
+handling, variable expansion, and quoting.
+
+The `special' builtins, which must be implemented as part of the
+shell to provide the desired functionality, are specified as
+being part of the shell; examples of these are `eval' and
+`export'. Other utilities appear in the sections of POSIX.2 not
+devoted to the shell which are commonly (and in some cases must
+be) implemented as builtin commands, such as `read' and `test'.
+POSIX.2 also specifies aspects of the shell's interactive
+behavior as part of the UPE, including job control and command
+line editing. Only vi-style line editing commands have been
+standardized; emacs editing commands were left out due to
+objections.
+
+The Open Group has made an older version of its Single Unix
+Specification (version 2), which is very similar to POSIX.2,
+available on the web at
+
+http://www.opengroup.org/onlinepubs/007908799/
+
+The Single Unix Specification, version 3, is available on the web at
+
+http://www.opengroup.org/onlinepubs/007904975/
+
+A10) What is the bash `posix mode'?
+
+Although bash is an implementation of the POSIX.2 shell
+specification, there are areas where the bash default behavior
+differs from that spec. The bash `posix mode' changes the bash
+behavior in these areas so that it obeys the spec more closely.
+
+Posix mode is entered by starting bash with the --posix or
+'-o posix' option or executing `set -o posix' after bash is running.
+
+The specific aspects of bash which change when posix mode is
+active are listed in the file POSIX in the bash distribution.
+They are also listed in a section in the Bash Reference Manual
+(from which that file is generated).
+
+Section B: The latest version
+
+B1) What's new in version 2.05b?
+
+The raison d'etre for bash-2.05b is to make a second intermediate
+release containing the first of the new features to be available
+in bash-3.0 and get feedback on those features before proceeding.
+The major new feature is multibyte character support in both Bash
+and Readline.
+
+Bash-2.05b contains the following new features (see the manual page for
+complete descriptions and the CHANGES and NEWS files in the bash-2.05b
+distribution):
+
+o support for multibyte characters has been added to both bash and readline
+
+o the DEBUG trap is now run *before* simple commands, ((...)) commands,
+ [[...]] conditional commands, and for ((...)) loops
+
+o the shell now performs arithmetic in the largest integer size the machine
+ supports (intmax_t)
+
+o there is a new \D{...} prompt expansion; passes the `...' to strftime(3)
+ and inserts the result into the expanded prompt
+
+o there is a new `here-string' redirection operator: <<< word
+
+o when displaying variables, function attributes and definitions are shown
+ separately, allowing them to be re-used as input (attempting to re-use
+ the old output would result in syntax errors).
+
+o `read' has a new `-u fd' option to read from a specified file descriptor
+
+o the bash debugger in examples/bashdb has been modified to work with the
+ new DEBUG trap semantics, the command set has been made more gdb-like,
+ and the changes to $LINENO make debugging functions work better
+
+o the expansion of $LINENO inside a shell function is only relative to the
+ function start if the shell is interactive -- if the shell is running a
+ script, $LINENO expands to the line number in the script. This is as
+ POSIX-2001 requires
+
+
+A short feature history dating from Bash-2.0:
+
+Bash-2.05a introduced the following new features:
+
+o The `printf' builtin has undergone major work
+
+o There is a new read-only `shopt' option: login_shell, which is set by
+ login shells and unset otherwise
+
+o New `\A' prompt string escape sequence; expanding to time in 24-hour
+ HH:MM format
+
+o New `-A group/-g' option to complete and compgen; goes group name
+ completion
+
+o New [+-]O invocation option to set and unset `shopt' options at startup
+
+o ksh-like `ERR' trap
+
+o `for' loops now allow empty word lists after the `in' reserved word
+
+o new `hard' and `soft' arguments for the `ulimit' builtin
+
+o Readline can be configured to place the user at the same point on the line
+ when retrieving commands from the history list
+
+o Readline can be configured to skip `hidden' files (filenames with a leading
+ `.' on Unix) when performing completion
+
+Bash-2.05 introduced the following new features:
+
+o This version has once again reverted to using locales and strcoll(3) when
+ processing pattern matching bracket expressions, as POSIX requires.
+o Added a new `--init-file' invocation argument as a synonym for `--rcfile',
+ per the new GNU coding standards.
+o The /dev/tcp and /dev/udp redirections now accept service names as well as
+ port numbers.
+o `complete' and `compgen' now take a `-o value' option, which controls some
+ of the aspects of that compspec. Valid values are:
+
+ default - perform bash default completion if programmable
+ completion produces no matches
+ dirnames - perform directory name completion if programmable
+ completion produces no matches
+ filenames - tell readline that the compspec produces filenames,
+ so it can do things like append slashes to
+ directory names and suppress trailing spaces
+o A new loadable builtin, realpath, which canonicalizes and expands symlinks
+ in pathname arguments.
+o When `set' is called without options, it prints function defintions in a
+ way that allows them to be reused as input. This affects `declare' and
+ `declare -p' as well. This only happens when the shell is not in POSIX
+ mode, since POSIX.2 forbids this behavior.
+
+Bash-2.04 introduced the following new features:
+
+o Programmable word completion with the new `complete' and `compgen' builtins;
+ examples are provided in examples/complete/complete-examples
+o `history' has a new `-d' option to delete a history entry
+o `bind' has a new `-x' option to bind key sequences to shell commands
+o The prompt expansion code has new `\j' and `\l' escape sequences
+o The `no_empty_cmd_completion' shell option, if enabled, inhibits
+ command completion when TAB is typed on an empty line
+o `help' has a new `-s' option to print a usage synopsis
+o New arithmetic operators: var++, var--, ++var, --var, expr1,expr2 (comma)
+o New ksh93-style arithmetic for command:
+ for ((expr1 ; expr2; expr3 )); do list; done
+o `read' has new options: `-t', `-n', `-d', `-s'
+o The redirection code handles several filenames specially: /dev/fd/N,
+ /dev/stdin, /dev/stdout, /dev/stderr
+o The redirection code now recognizes /dev/tcp/HOST/PORT and
+ /dev/udp/HOST/PORT and tries to open a TCP or UDP socket, respectively,
+ to the specified port on the specified host
+o The ${!prefix*} expansion has been implemented
+o A new FUNCNAME variable, which expands to the name of a currently-executing
+ function
+o The GROUPS variable is no longer readonly
+o A new shopt `xpg_echo' variable, to control the behavior of echo with
+ respect to backslash-escape sequences at runtime
+o The NON_INTERACTIVE_LOGIN_SHELLS #define has returned
+
+The version of Readline released with Bash-2.04, Readline-4.1, had several
+new features as well:
+
+o Parentheses matching is always compiled into readline, and controllable
+ with the new `blink-matching-paren' variable
+o The history-search-forward and history-search-backward functions now leave
+ point at the end of the line when the search string is empty, like
+ reverse-search-history, and forward-search-history
+o A new function for applications: rl_on_new_line_with_prompt()
+o New variables for applications: rl_already_prompted, and rl_gnu_readline_p
+
+
+Bash-2.03 had very few new features, in keeping with the convention
+that odd-numbered releases provide mainly bug fixes. A number of new
+features were added to Readline, mostly at the request of the Cygnus
+folks.
+
+A new shopt option, `restricted_shell', so that startup files can test
+ whether or not the shell was started in restricted mode
+Filename generation is now performed on the words between ( and ) in
+ compound array assignments (this is really a bug fix)
+OLDPWD is now auto-exported, as POSIX.2 requires
+ENV and BASH_ENV are read-only variables in a restricted shell
+Bash may now be linked against an already-installed Readline library,
+ as long as the Readline library is version 4 or newer
+All shells begun with the `--login' option will source the login shell
+ startup files, even if the shell is not interactive
+
+There were lots of changes to the version of the Readline library released
+along with Bash-2.03. For a complete list of the changes, read the file
+CHANGES in the Bash-2.03 distribution.
+
+Bash-2.02 contained the following new features:
+
+a new version of malloc (based on the old GNU malloc code in previous
+ bash versions) that is more page-oriented, more conservative
+ with memory usage, does not `orphan' large blocks when they
+ are freed, is usable on 64-bit machines, and has allocation
+ checking turned on unconditionally
+POSIX.2-style globbing character classes ([:alpha:], [:alnum:], etc.)
+POSIX.2-style globbing equivalence classes
+POSIX.2-style globbing collating symbols
+the ksh [[...]] extended conditional command
+the ksh egrep-style extended pattern matching operators
+a new `printf' builtin
+the ksh-like $(<filename) command substitution, which is equivalent to
+ $(cat filename)
+new tilde prefixes that expand to directories from the directory stack
+new `**' arithmetic operator to do exponentiation
+case-insensitive globbing (filename expansion)
+menu completion a la tcsh
+`magic-space' history expansion function like tcsh
+the readline inputrc `language' has a new file inclusion directive ($include)
+
+Bash-2.01 contained only a few new features:
+
+new `GROUPS' builtin array variable containing the user's group list
+new bindable readline commands: history-and-alias-expand-line and
+ alias-expand-line
+
+Bash-2.0 contained extensive changes and new features from bash-1.14.7.
+Here's a short list:
+
+new `time' reserved word to time pipelines, shell builtins, and
+ shell functions
+one-dimensional arrays with a new compound assignment statement,
+ appropriate expansion constructs and modifications to some
+ of the builtins (read, declare, etc.) to use them
+new quoting syntaxes for ANSI-C string expansion and locale-specific
+ string translation
+new expansions to do substring extraction, pattern replacement, and
+ indirect variable expansion
+new builtins: `disown' and `shopt'
+new variables: HISTIGNORE, SHELLOPTS, PIPESTATUS, DIRSTACK, GLOBIGNORE,
+ MACHTYPE, BASH_VERSINFO
+special handling of many unused or redundant variables removed
+ (e.g., $notify, $glob_dot_filenames, $no_exit_on_failed_exec)
+dynamic loading of new builtin commands; many loadable examples provided
+new prompt expansions: \a, \e, \n, \H, \T, \@, \v, \V
+history and aliases available in shell scripts
+new readline variables: enable-keypad, mark-directories, input-meta,
+ visible-stats, disable-completion, comment-begin
+new readline commands to manipulate the mark and operate on the region
+new readline emacs mode commands and bindings for ksh-88 compatibility
+updated and extended builtins
+new DEBUG trap
+expanded (and now documented) restricted shell mode
+
+implementation stuff:
+autoconf-based configuration
+nearly all of the bugs reported since version 1.14 have been fixed
+most builtins converted to use builtin `getopt' for consistency
+most builtins use -p option to display output in a reusable form
+ (for consistency)
+grammar tighter and smaller (66 reduce-reduce conflicts gone)
+lots of code now smaller and faster
+test suite greatly expanded
+
+B2) Are there any user-visible incompatibilities between bash-2.05b and
+ bash-1.14.7?
+
+There are a few incompatibilities between version 1.14.7 and version 2.05b.
+They are detailed in the file COMPAT in the bash distribution. That file
+is not meant to be all-encompassing; send mail to bash-maintainers@gnu.org
+if if you find something that's not mentioned there.
+
+Section C: Differences from other Unix shells
+
+C1) How does bash differ from sh, the Bourne shell?
+
+This is a non-comprehensive list of features that differentiate bash
+from the SVR4.2 shell. The bash manual page explains these more
+completely.
+
+Things bash has that sh does not:
+ long invocation options
+ [+-]O invocation option
+ -l invocation option
+ `!' reserved word to invert pipeline return value
+ `time' reserved word to time pipelines and shell builtins
+ the `function' reserved word
+ the `select' compound command and reserved word
+ arithmetic for command: for ((expr1 ; expr2; expr3 )); do list; done
+ new $'...' and $"..." quoting
+ the $(...) form of command substitution
+ the $(<filename) form of command substitution, equivalent to
+ $(cat filename)
+ the ${#param} parameter value length operator
+ the ${!param} indirect parameter expansion operator
+ the ${!param*} prefix expansion operator
+ the ${param:offset[:length]} parameter substring operator
+ the ${param/pat[/string]} parameter pattern substitution operator
+ expansions to perform substring removal (${p%[%]w}, ${p#[#]w})
+ expansion of positional parameters beyond $9 with ${num}
+ variables: BASH, BASH_VERSION, BASH_VERSINFO, UID, EUID, REPLY,
+ TIMEFORMAT, PPID, PWD, OLDPWD, SHLVL, RANDOM, SECONDS,
+ LINENO, HISTCMD, HOSTTYPE, OSTYPE, MACHTYPE, HOSTNAME,
+ ENV, PS3, PS4, DIRSTACK, PIPESTATUS, HISTSIZE, HISTFILE,
+ HISTFILESIZE, HISTCONTROL, HISTIGNORE, GLOBIGNORE, GROUPS,
+ PROMPT_COMMAND, FCEDIT, FIGNORE, IGNOREEOF, INPUTRC,
+ SHELLOPTS, OPTERR, HOSTFILE, TMOUT, FUNCNAME, histchars,
+ auto_resume
+ DEBUG trap
+ ERR trap
+ variable arrays with new compound assignment syntax
+ redirections: <>, &>, >|, <<<, [n]<&word-, [n]>&word-
+ prompt string special char translation and variable expansion
+ auto-export of variables in initial environment
+ command search finds functions before builtins
+ bash return builtin will exit a file sourced with `.'
+ builtins: cd -/-L/-P, exec -l/-c/-a, echo -e/-E, hash -d/-l/-p/-t.
+ export -n/-f/-p/name=value, pwd -L/-P,
+ read -e/-p/-a/-t/-n/-d/-s/-u,
+ readonly -a/-f/name=value, trap -l, set +o,
+ set -b/-m/-o option/-h/-p/-B/-C/-H/-P,
+ unset -f/-v, ulimit -m/-p/-u,
+ type -a/-p/-t/-f/-P, suspend -f, kill -n,
+ test -o optname/s1 == s2/s1 < s2/s1 > s2/-nt/-ot/-ef/-O/-G/-S
+ bash reads ~/.bashrc for interactive shells, $ENV for non-interactive
+ bash restricted shell mode is more extensive
+ bash allows functions and variables with the same name
+ brace expansion
+ tilde expansion
+ arithmetic expansion with $((...)) and `let' builtin
+ the `[[...]]' extended conditional command
+ process substitution
+ aliases and alias/unalias builtins
+ local variables in functions and `local' builtin
+ readline and command-line editing with programmable completion
+ command history and history/fc builtins
+ csh-like history expansion
+ other new bash builtins: bind, command, compgen, complete, builtin,
+ declare/typeset, dirs, enable, fc, help,
+ history, logout, popd, pushd, disown, shopt,
+ printf
+ exported functions
+ filename generation when using output redirection (command >a*)
+ POSIX.2-style globbing character classes
+ POSIX.2-style globbing equivalence classes
+ POSIX.2-style globbing collating symbols
+ egrep-like extended pattern matching operators
+ case-insensitive pattern matching and globbing
+ variable assignments preceding commands affect only that command,
+ even for builtins and functions
+ posix mode
+ redirection to /dev/fd/N, /dev/stdin, /dev/stdout, /dev/stderr,
+ /dev/tcp/host/port, /dev/udp/host/port
+
+Things sh has that bash does not:
+ uses variable SHACCT to do shell accounting
+ includes `stop' builtin (bash can use alias stop='kill -s STOP')
+ `newgrp' builtin
+ turns on job control if called as `jsh'
+ $TIMEOUT (like bash $TMOUT)
+ `^' is a synonym for `|'
+ new SVR4.2 sh builtins: mldmode, priv
+
+Implementation differences:
+ redirection to/from compound commands causes sh to create a subshell
+ bash does not allow unbalanced quotes; sh silently inserts them at EOF
+ bash does not mess with signal 11
+ sh sets (euid, egid) to (uid, gid) if -p not supplied and uid < 100
+ bash splits only the results of expansions on IFS, using POSIX.2
+ field splitting rules; sh splits all words on IFS
+ sh does not allow MAILCHECK to be unset (?)
+ sh does not allow traps on SIGALRM or SIGCHLD
+ bash allows multiple option arguments when invoked (e.g. -x -v);
+ sh allows only a single option argument (`sh -x -v' attempts
+ to open a file named `-v', and, on SunOS 4.1.4, dumps core.
+ On Solaris 2.4 and earlier versions, sh goes into an infinite
+ loop.)
+ sh exits a script if any builtin fails; bash exits only if one of
+ the POSIX.2 `special' builtins fails
+
+C2) How does bash differ from the Korn shell, version ksh88?
+
+Things bash has or uses that ksh88 does not:
+ long invocation options
+ [-+]O invocation option
+ -l invocation option
+ `!' reserved word
+ arithmetic for command: for ((expr1 ; expr2; expr3 )); do list; done
+ arithmetic in largest machine-supported size (intmax_t)
+ posix mode and posix conformance
+ command hashing
+ tilde expansion for assignment statements that look like $PATH
+ process substitution with named pipes if /dev/fd is not available
+ the ${!param} indirect parameter expansion operator
+ the ${!param*} prefix expansion operator
+ the ${param:offset[:length]} parameter substring operator
+ the ${param/pat[/string]} parameter pattern substitution operator
+ variables: BASH, BASH_VERSION, BASH_VERSINFO, UID, EUID, SHLVL,
+ TIMEFORMAT, HISTCMD, HOSTTYPE, OSTYPE, MACHTYPE,
+ HISTFILESIZE, HISTIGNORE, HISTCONTROL, PROMPT_COMMAND,
+ IGNOREEOF, FIGNORE, INPUTRC, HOSTFILE, DIRSTACK,
+ PIPESTATUS, HOSTNAME, OPTERR, SHELLOPTS, GLOBIGNORE,
+ GROUPS, FUNCNAME, histchars, auto_resume
+ prompt expansion with backslash escapes and command substitution
+ redirection: &> (stdout and stderr), <<<, [n]<&word-, [n]>&word-
+ more extensive and extensible editing and programmable completion
+ builtins: bind, builtin, command, declare, dirs, echo -e/-E, enable,
+ exec -l/-c/-a, fc -s, export -n/-f/-p, hash, help, history,
+ jobs -x/-r/-s, kill -s/-n/-l, local, logout, popd, pushd,
+ read -e/-p/-a/-t/-n/-d/-s, readonly -a/-n/-f/-p,
+ set -o braceexpand/-o histexpand/-o interactive-comments/
+ -o notify/-o physical/-o posix/-o hashall/-o onecmd/
+ -h/-B/-C/-b/-H/-P, set +o, suspend, trap -l, type,
+ typeset -a/-F/-p, ulimit -u, umask -S, alias -p, shopt,
+ disown, printf, complete, compgen
+ `!' csh-style history expansion
+ POSIX.2-style globbing character classes
+ POSIX.2-style globbing equivalence classes
+ POSIX.2-style globbing collating symbols
+ egrep-like extended pattern matching operators
+ case-insensitive pattern matching and globbing
+ `**' arithmetic operator to do exponentiation
+ redirection to /dev/fd/N, /dev/stdin, /dev/stdout, /dev/stderr
+ arrays of unlimited size
+ TMOUT is default timeout for `read' and `select'
+
+Things ksh88 has or uses that bash does not:
+ tracked aliases (alias -t)
+ variables: ERRNO, FPATH, EDITOR, VISUAL
+ co-processes (|&, >&p, <&p)
+ weirdly-scoped functions
+ typeset +f to list all function names without definitions
+ text of command history kept in a file, not memory
+ builtins: alias -x, cd old new, fc -e -, newgrp, print,
+ read -p/-s/var?prompt, set -A/-o gmacs/
+ -o bgnice/-o markdirs/-o nolog/-o trackall/-o viraw/-s,
+ typeset -H/-L/-R/-Z/-A/-ft/-fu/-fx/-l/-u/-t, whence
+ using environment to pass attributes of exported variables
+ arithmetic evaluation done on arguments to some builtins
+ reads .profile from $PWD when invoked as login shell
+
+Implementation differences:
+ ksh runs last command of a pipeline in parent shell context
+ bash has brace expansion by default (ksh88 compile-time option)
+ bash has fixed startup file for all interactive shells; ksh reads $ENV
+ bash has exported functions
+ bash command search finds functions before builtins
+ bash waits for all commands in pipeline to exit before returning status
+ emacs-mode editing has some slightly different key bindings
+
+C3) Which new features in ksh-93 are not in bash, and which are?
+
+New things in ksh-93 not in bash-2.05b:
+ associative arrays
+ floating point arithmetic and variables
+ math library functions
+ ${!name[sub]} name of subscript for associative array
+ `.' is allowed in variable names to create a hierarchical namespace
+ more extensive compound assignment syntax
+ discipline functions
+ `sleep' and `getconf' builtins (bash has loadable versions)
+ typeset -n and `nameref' variables
+ KEYBD trap
+ variables: .sh.edchar, .sh.edmode, .sh.edcol, .sh.edtext, .sh.version,
+ .sh.name, .sh.subscript, .sh.value, .sh.match, HISTEDIT
+ backreferences in pattern matching (\N)
+ `&' operator in pattern lists for matching
+ print -f (bash uses printf)
+ `fc' has been renamed to `hist'
+ `.' can execute shell functions
+ exit statuses between 0 and 255
+ set -o pipefail
+ `+=' variable assignment operator
+ FPATH and PATH mixing
+ getopts -a
+ -I invocation option
+ DEBUG trap now executed before each simple command, instead of after
+ printf %H, %P, %T, %Z modifiers, output base for %d
+ lexical scoping for local variables in `ksh' functions
+ no scoping for local variables in `POSIX' functions
+
+New things in ksh-93 present in bash-2.05b:
+ [n]<&word- and [n]>&word- redirections (combination dup and close)
+ for (( expr1; expr2; expr3 )) ; do list; done - arithmetic for command
+ ?:, ++, --, `expr1 , expr2' arithmetic operators
+ expansions: ${!param}, ${param:offset[:len]}, ${param/pat[/str]},
+ ${!param*}
+ compound array assignment
+ the `!' reserved word
+ loadable builtins -- but ksh uses `builtin' while bash uses `enable'
+ `command', `builtin', `disown' builtins
+ new $'...' and $"..." quoting
+ FIGNORE (but bash uses GLOBIGNORE), HISTCMD
+ set -o notify/-C
+ changes to kill builtin
+ read -A (bash uses read -a)
+ read -t/-d
+ trap -p
+ exec -c/-a
+ `.' restores the positional parameters when it completes
+ POSIX.2 `test'
+ umask -S
+ unalias -a
+ command and arithmetic substitution performed on PS1, PS4, and ENV
+ command name completion
+ ENV processed only for interactive shells
+
+Section D: Why does bash do some things differently than other Unix shells?
+
+D1) Why does bash run a different version of `command' than
+ `which command' says it will?
+
+On many systems, `which' is actually a csh script that assumes
+you're running csh. In tcsh, `which' and its cousin `where'
+are builtins. On other Unix systems, `which' is a perl script
+that uses the PATH environment variable.
+
+The csh script version reads the csh startup files from your
+home directory and uses those to determine which `command' will
+be invoked. Since bash doesn't use any of those startup files,
+there's a good chance that your bash environment differs from
+your csh environment. The bash `type' builtin does everything
+`which' does, and will report correct results for the running
+shell. If you're really wedded to the name `which', try adding
+the following function definition to your .bashrc:
+
+ which()
+ {
+ builtin type "$@"
+ }
+
+If you're moving from tcsh and would like to bring `where' along
+as well, use this function:
+
+ where()
+ {
+ builtin type -a "$@"
+ }
+
+D2) Why doesn't bash treat brace expansions exactly like csh?
+
+The only difference between bash and csh brace expansion is that
+bash requires a brace expression to contain at least one unquoted
+comma if it is to be expanded. Any brace-surrounded word not
+containing an unquoted comma is left unchanged by the brace
+expansion code. This affords the greatest degree of sh
+compatibility.
+
+Bash, ksh, zsh, and pd-ksh all implement brace expansion this way.
+
+D3) Why doesn't bash have csh variable modifiers?
+
+Posix has specified a more powerful, albeit somewhat more cryptic,
+mechanism cribbed from ksh, and bash implements it.
+
+${parameter%word}
+ Remove smallest suffix pattern. The WORD is expanded to produce
+ a pattern. It then expands to the value of PARAMETER, with the
+ smallest portion of the suffix matched by the pattern deleted.
+
+ x=file.c
+ echo ${x%.c}.o
+ -->file.o
+
+${parameter%%word}
+
+ Remove largest suffix pattern. The WORD is expanded to produce
+ a pattern. It then expands to the value of PARAMETER, with the
+ largest portion of the suffix matched by the pattern deleted.
+
+ x=posix/src/std
+ echo ${x%%/*}
+ -->posix
+
+${parameter#word}
+ Remove smallest prefix pattern. The WORD is expanded to produce
+ a pattern. It then expands to the value of PARAMETER, with the
+ smallest portion of the prefix matched by the pattern deleted.
+
+ x=$HOME/src/cmd
+ echo ${x#$HOME}
+ -->/src/cmd
+
+${parameter##word}
+ Remove largest prefix pattern. The WORD is expanded to produce
+ a pattern. It then expands to the value of PARAMETER, with the
+ largest portion of the prefix matched by the pattern deleted.
+
+ x=/one/two/three
+ echo ${x##*/}
+ -->three
+
+
+Given
+ a=/a/b/c/d
+ b=b.xxx
+
+ csh bash result
+ --- ---- ------
+ $a:h ${a%/*} /a/b/c
+ $a:t ${a##*/} d
+ $b:r ${b%.*} b
+ $b:e ${b##*.} xxx
+
+
+D4) How can I make my csh aliases work when I convert to bash?
+
+Bash uses a different syntax to support aliases than csh does.
+The details can be found in the documentation. We have provided
+a shell script which does most of the work of conversion for you;
+this script can be found in ./examples/misc/aliasconv.sh. Here is
+how you use it:
+
+Start csh in the normal way for you. (e.g., `csh')
+
+Pipe the output of `alias' through `aliasconv.sh', saving the
+results into `bash_aliases':
+
+ alias | bash aliasconv.sh >bash_aliases
+
+Edit `bash_aliases', carefully reading through any created
+functions. You will need to change the names of some csh specific
+variables to the bash equivalents. The script converts $cwd to
+$PWD, $term to $TERM, $home to $HOME, $user to $USER, and $prompt
+to $PS1. You may also have to add quotes to avoid unwanted
+expansion.
+
+For example, the csh alias:
+
+ alias cd 'cd \!*; echo $cwd'
+
+is converted to the bash function:
+
+ cd () { command cd "$@"; echo $PWD ; }
+
+The only thing that needs to be done is to quote $PWD:
+
+ cd () { command cd "$@"; echo "$PWD" ; }
+
+Merge the edited file into your ~/.bashrc.
+
+There is an additional, more ambitious, script in
+examples/misc/cshtobash that attempts to convert your entire csh
+environment to its bash equivalent. This script can be run as
+simply `cshtobash' to convert your normal interactive
+environment, or as `cshtobash ~/.login' to convert your login
+environment.
+
+D5) How can I pipe standard output and standard error from one command to
+ another, like csh does with `|&'?
+
+Use
+ command 2>&1 | command2
+
+The key is to remember that piping is performed before redirection, so
+file descriptor 1 points to the pipe when it is duplicated onto file
+descriptor 2.
+
+D6) Now that I've converted from ksh to bash, are there equivalents to
+ ksh features like autoloaded functions and the `whence' command?
+
+There are features in ksh-88 and ksh-93 that do not have direct bash
+equivalents. Most, however, can be emulated with very little trouble.
+
+ksh-88 feature Bash equivalent
+-------------- ---------------
+compiled-in aliases set up aliases in .bashrc; some ksh aliases are
+ bash builtins (hash, history, type)
+coprocesses named pipe pairs (one for read, one for write)
+typeset +f declare -F
+cd, print, whence function substitutes in examples/functions/kshenv
+autoloaded functions examples/functions/autoload is the same as typeset -fu
+read var?prompt read -p prompt var
+
+ksh-93 feature Bash equivalent
+-------------- ---------------
+sleep, getconf Bash has loadable versions in examples/loadables
+${.sh.version} $BASH_VERSION
+print -f printf
+hist alias hist=fc
+$HISTEDIT $FCEDIT
+
+Section E: How can I get bash to do certain things, and why does bash do
+ things the way it does?
+
+E1) Why is the bash builtin `test' slightly different from /bin/test?
+
+The specific example used here is [ ! x -o x ], which is false.
+
+Bash's builtin `test' implements the Posix.2 spec, which can be
+summarized as follows (the wording is due to David Korn):
+
+Here is the set of rules for processing test arguments.
+
+ 0 Args: False
+ 1 Arg: True iff argument is not null.
+ 2 Args: If first arg is !, True iff second argument is null.
+ If first argument is unary, then true if unary test is true
+ Otherwise error.
+ 3 Args: If second argument is a binary operator, do binary test of $1 $3
+ If first argument is !, negate two argument test of $2 $3
+ If first argument is `(' and third argument is `)', do the
+ one-argument test of the second argument.
+ Otherwise error.
+ 4 Args: If first argument is !, negate three argument test of $2 $3 $4.
+ Otherwise unspecified
+ 5 or more Args: unspecified. (Historical shells would use their
+ current algorithm).
+
+The operators -a and -o are considered binary operators for the purpose
+of the 3 Arg case.
+
+As you can see, the test becomes (not (x or x)), which is false.
+
+E2) Why does bash sometimes say `Broken pipe'?
+
+If a sequence of commands appears in a pipeline, and one of the
+reading commands finishes before the writer has finished, the
+writer receives a SIGPIPE signal. Many other shells special-case
+SIGPIPE as an exit status in the pipeline and do not report it.
+For example, in:
+
+ ps -aux | head
+
+`head' can finish before `ps' writes all of its output, and ps
+will try to write on a pipe without a reader. In that case, bash
+will print `Broken pipe' to stderr when ps is killed by a
+SIGPIPE.
+
+You can build a version of bash that will not report SIGPIPE errors
+by uncommenting the definition of DONT_REPORT_SIGPIPE in the file
+config-top.h.
+
+E3) When I have terminal escape sequences in my prompt, why does bash
+ wrap lines at the wrong column?
+
+Readline, the line editing library that bash uses, does not know
+that the terminal escape sequences do not take up space on the
+screen. The redisplay code assumes, unless told otherwise, that
+each character in the prompt is a `printable' character that
+takes up one character position on the screen.
+
+You can use the bash prompt expansion facility (see the PROMPTING
+section in the manual page) to tell readline that sequences of
+characters in the prompt strings take up no screen space.
+
+Use the \[ escape to begin a sequence of non-printing characters,
+and the \] escape to signal the end of such a sequence.
+
+E4) If I pipe the output of a command into `read variable', why doesn't
+ the output show up in $variable when the read command finishes?
+
+This has to do with the parent-child relationship between Unix
+processes. It affects all commands run in pipelines, not just
+simple calls to `read'. For example, piping a command's output
+into a `while' loop that repeatedly calls `read' will result in
+the same behavior.
+
+Each element of a pipeline runs in a separate process, a child of
+the shell running the pipeline. A subprocess cannot affect its
+parent's environment. When the `read' command sets the variable
+to the input, that variable is set only in the subshell, not the
+parent shell. When the subshell exits, the value of the variable
+is lost.
+
+Many pipelines that end with `read variable' can be converted
+into command substitutions, which will capture the output of
+a specified command. The output can then be assigned to a
+variable:
+
+ grep ^gnu /usr/lib/news/active | wc -l | read ngroup
+
+can be converted into
+
+ ngroup=$(grep ^gnu /usr/lib/news/active | wc -l)
+
+This does not, unfortunately, work to split the text among
+multiple variables, as read does when given multiple variable
+arguments. If you need to do this, you can either use the
+command substitution above to read the output into a variable
+and chop up the variable using the bash pattern removal
+expansion operators or use some variant of the following
+approach.
+
+Say /usr/local/bin/ipaddr is the following shell script:
+
+#! /bin/sh
+host `hostname` | awk '/address/ {print $NF}'
+
+Instead of using
+
+ /usr/local/bin/ipaddr | read A B C D
+
+to break the local machine's IP address into separate octets, use
+
+ OIFS="$IFS"
+ IFS=.
+ set -- $(/usr/local/bin/ipaddr)
+ IFS="$OIFS"
+ A="$1" B="$2" C="$3" D="$4"
+
+Beware, however, that this will change the shell's positional
+parameters. If you need them, you should save them before doing
+this.
+
+This is the general approach -- in most cases you will not need to
+set $IFS to a different value.
+
+Some other user-supplied alternatives include:
+
+read A B C D << HERE
+ $(IFS=.; echo $(/usr/local/bin/ipaddr))
+HERE
+
+and, where process substitution is available,
+
+read A B C D < <(IFS=.; echo $(/usr/local/bin/ipaddr))
+
+E5) I have a bunch of shell scripts that use backslash-escaped characters
+ in arguments to `echo'. Bash doesn't interpret these characters. Why
+ not, and how can I make it understand them?
+
+This is the behavior of echo on most Unix System V machines.
+
+The bash builtin `echo' is modeled after the 9th Edition
+Research Unix version of `echo'. It does not interpret
+backslash-escaped characters in its argument strings by default;
+it requires the use of the -e option to enable the
+interpretation. The System V echo provides no way to disable the
+special characters; the bash echo has a -E option to disable
+them.
+
+There is a configuration option that will make bash behave like
+the System V echo and interpret things like `\t' by default. Run
+configure with the --enable-xpg-echo-default option to turn this
+on. Be aware that this will cause some of the tests run when you
+type `make tests' to fail.
+
+There is a shell option, `xpg_echo', settable with `shopt', that will
+change the behavior of echo at runtime. Enabling this option turns
+on expansion of backslash-escape sequences.
+
+E6) Why doesn't a while or for loop get suspended when I type ^Z?
+
+This is a consequence of how job control works on Unix. The only
+thing that can be suspended is the process group. This is a single
+command or pipeline of commands that the shell forks and executes.
+
+When you run a while or for loop, the only thing that the shell forks
+and executes are any commands in the while loop test and commands in
+the loop bodies. These, therefore, are the only things that can be
+suspended when you type ^Z.
+
+If you want to be able to stop the entire loop, you need to put it
+within parentheses, which will force the loop into a subshell that
+may be stopped (and subsequently restarted) as a single unit.
+
+E7) What about empty for loops in Makefiles?
+
+It's fairly common to see constructs like this in automatically-generated
+Makefiles:
+
+SUBDIRS = @SUBDIRS@
+
+ ...
+
+subdirs-clean:
+ for d in ${SUBDIRS}; do \
+ ( cd $$d && ${MAKE} ${MFLAGS} clean ) \
+ done
+
+When SUBDIRS is empty, this results in a command like this being passed to
+bash:
+
+ for d in ; do
+ ( cd $d && ${MAKE} ${MFLAGS} clean )
+ done
+
+In versions of bash before bash-2.05a, this was a syntax error. If the
+reserved word `in' was present, a word must follow it before the semicolon
+or newline. The language in the manual page referring to the list of words
+being empty referred to the list after it is expanded. These versions of
+bash required that there be at least one word following the `in' when the
+construct was parsed.
+
+The idiomatic Makefile solution is something like:
+
+SUBDIRS = @SUBDIRS@
+
+subdirs-clean:
+ subdirs=$SUBDIRS ; for d in $$subdirs; do \
+ ( cd $$d && ${MAKE} ${MFLAGS} clean ) \
+ done
+
+The latest drafts of the updated POSIX standard have changed this: the
+word list is no longer required. Bash versions 2.05a and later accept
+the new syntax.
+
+E8) Why does the arithmetic evaluation code complain about `08'?
+
+The bash arithmetic evaluation code (used for `let', $(()), (()), and in
+other places), interprets a leading `0' in numeric constants as denoting
+an octal number, and a leading `0x' as denoting hexadecimal. This is
+in accordance with the POSIX.2 spec, section 2.9.2.1, which states that
+arithmetic constants should be handled as signed long integers as defined
+by the ANSI/ISO C standard.
+
+The POSIX.2 interpretation committee has confirmed this:
+
+http://www.pasc.org/interps/unofficial/db/p1003.2/pasc-1003.2-173.html
+
+E9) Why does the pattern matching expression [A-Z]* match files beginning
+ with every letter except `z'?
+
+Bash-2.03, Bash-2.05 and later versions honor the current locale setting
+when processing ranges within pattern matching bracket expressions ([A-Z]).
+This is what POSIX.2 and SUSv3/XPG6 specify.
+
+The behavior of the matcher in bash-2.05 and later versions depends on the
+current LC_COLLATE setting. Setting this variable to `C' or `POSIX' will
+result in the traditional behavior ([A-Z] matches all uppercase ASCII
+characters). Many other locales, including the en_US locale (the default
+on many US versions of Linux) collate the upper and lower case letters like
+this:
+
+ AaBb...Zz
+
+which means that [A-Z] matches every letter except `z'. Others collate like
+
+ aAbBcC...zZ
+
+which means that [A-Z] matches every letter except `a'.
+
+The portable way to specify upper case letters is [:upper:] instead of
+A-Z; lower case may be specified as [:lower:] instead of a-z.
+
+Look at the manual pages for setlocale(3), strcoll(3), and, if it is
+present, locale(1). If you have locale(1), you can use it to find
+your current locale information even if you do not have any of the
+LC_ variables set.
+
+My advice is to put
+
+ export LC_COLLATE=C
+
+into /etc/profile and inspect any shell scripts run from cron for
+constructs like [A-Z]. This will prevent things like
+
+ rm [A-Z]*
+
+from removing every file in the current directory except those beginning
+with `z' and still allow individual users to change the collation order.
+Users may put the above command into their own profiles as well, of course.
+
+E10) Why does `cd //' leave $PWD as `//'?
+
+POSIX.2, in its description of `cd', says that *three* or more leading
+slashes may be replaced with a single slash when canonicalizing the
+current working directory.
+
+This is, I presume, for historical compatibility. Certain versions of
+Unix, and early network file systems, used paths of the form
+//hostname/path to access `path' on server `hostname'.
+
+E11) If I resize my xterm while another program is running, why doesn't bash
+ notice the change?
+
+This is another issue that deals with job control.
+
+The kernel maintains a notion of a current terminal process group. Members
+of this process group (processes whose process group ID is equal to the
+current terminal process group ID) receive terminal-generated signals like
+SIGWINCH. (For more details, see the JOB CONTROL section of the bash
+man page.)
+
+If a terminal is resized, the kernel sends SIGWINCH to each member of
+the terminal's current process group (the `foreground' process group).
+
+When bash is running with job control enabled, each pipeline (which may be
+a single command) is run in its own process group, different from bash's
+process group. This foreground process group receives the SIGWINCH; bash
+does not. Bash has no way of knowing that the terminal has been resized.
+
+There is a `checkwinsize' option, settable with the `shopt' builtin, that
+will cause bash to check the window size and adjust its idea of the
+terminal's dimensions each time a process stops or exits and returns control
+of the terminal to bash. Enable it with `shopt -s checkwinsize'.
+
+Section F: Things to watch out for on certain Unix versions
+
+F1) Why can't I use command line editing in my `cmdtool'?
+
+The problem is `cmdtool' and bash fighting over the input. When
+scrolling is enabled in a cmdtool window, cmdtool puts the tty in
+`raw mode' to permit command-line editing using the mouse for
+applications that cannot do it themselves. As a result, bash and
+cmdtool each try to read keyboard input immediately, with neither
+getting enough of it to be useful.
+
+This mode also causes cmdtool to not implement many of the
+terminal functions and control sequences appearing in the
+`sun-cmd' termcap entry. For a more complete explanation, see
+that file examples/suncmd.termcap in the bash distribution.
+
+`xterm' is a better choice, and gets along with bash much more
+smoothly.
+
+If you must use cmdtool, you can use the termcap description in
+examples/suncmd.termcap. Set the TERMCAP variable to the terminal
+description contained in that file, i.e.
+
+TERMCAP='Mu|sun-cmd:am:bs:km:pt:li#34:co#80:cl=^L:ce=\E[K:cd=\E[J:rs=\E[s:'
+
+Then export TERMCAP and start a new cmdtool window from that shell.
+The bash command-line editing should behave better in the new
+cmdtool. If this works, you can put the assignment to TERMCAP
+in your bashrc file.
+
+F2) I built bash on Solaris 2. Why do globbing expansions and filename
+ completion chop off the first few characters of each filename?
+
+This is the consequence of building bash on SunOS 5 and linking
+with the libraries in /usr/ucblib, but using the definitions
+and structures from files in /usr/include.
+
+The actual conflict is between the dirent structure in
+/usr/include/dirent.h and the struct returned by the version of
+`readdir' in libucb.a (a 4.3-BSD style `struct direct').
+
+Make sure you've got /usr/ccs/bin ahead of /usr/ucb in your $PATH
+when configuring and building bash. This will ensure that you
+use /usr/ccs/bin/cc or acc instead of /usr/ucb/cc and that you
+link with libc before libucb.
+
+If you have installed the Sun C compiler, you may also need to
+put /usr/ccs/bin and /opt/SUNWspro/bin into your $PATH before
+/usr/ucb.
+
+F3) Why does bash dump core after I interrupt username completion or
+ `~user' tilde expansion on a machine running NIS?
+
+This is a famous and long-standing bug in the SunOS YP (sorry, NIS)
+client library, which is part of libc.
+
+The YP library code keeps static state -- a pointer into the data
+returned from the server. When YP initializes itself (setpwent),
+it looks at this pointer and calls free on it if it's non-null.
+So far, so good.
+
+If one of the YP functions is interrupted during getpwent (the
+exact function is interpretwithsave()), and returns NULL, the
+pointer is freed without being reset to NULL, and the function
+returns. The next time getpwent is called, it sees that this
+pointer is non-null, calls free, and the bash free() blows up
+because it's being asked to free freed memory.
+
+The traditional Unix mallocs allow memory to be freed multiple
+times; that's probably why this has never been fixed. You can
+run configure with the `--without-gnu-malloc' option to use
+the C library malloc and avoid the problem.
+
+F4) I'm running SVR4.2. Why is the line erased every time I type `@'?
+
+The `@' character is the default `line kill' character in most
+versions of System V, including SVR4.2. You can change this
+character to whatever you want using `stty'. For example, to
+change the line kill character to control-u, type
+
+ stty kill ^U
+
+where the `^' and `U' can be two separate characters.
+
+F5) Why does bash report syntax errors when my C News scripts use a
+ redirection before a subshell command?
+
+The actual command in question is something like
+
+ < file ( command )
+
+According to the grammar given in the POSIX.2 standard, this construct
+is, in fact, a syntax error. Redirections may only precede `simple
+commands'. A subshell construct such as the above is one of the shell's
+`compound commands'. A redirection may only follow a compound command.
+
+This affects the mechanical transformation of commands that use `cat'
+to pipe a file into a command (a favorite Useless-Use-Of-Cat topic on
+comp.unix.shell). While most commands of the form
+
+ cat file | command
+
+can be converted to `< file command', shell control structures such as
+loops and subshells require `command < file'.
+
+The file CWRU/sh-redir-hack in the bash-2.05a distribution is an
+(unofficial) patch to parse.y that will modify the grammar to
+support this construct. It will not apply with `patch'; you must
+modify parse.y by hand. Note that if you apply this, you must
+recompile with -DREDIRECTION_HACK. This introduces a large
+number of reduce/reduce conflicts into the shell grammar.
+
+F6) Why can't I use vi-mode editing on Red Hat Linux 6.1?
+
+The short answer is that Red Hat screwed up.
+
+The long answer is that they shipped an /etc/inputrc that only works
+for emacs mode editing, and then screwed all the vi users by setting
+INPUTRC to /etc/inputrc in /etc/profile.
+
+The short fix is to do one of the following: remove or rename
+/etc/inputrc, set INPUTRC=~/.inputrc in ~/.bashrc (or .bash_profile,
+but make sure you export it if you do), remove the assignment to
+INPUTRC from /etc/profile, add
+
+ set keymap emacs
+
+to the beginning of /etc/inputrc, or bracket the key bindings in
+/etc/inputrc with these lines
+
+ $if mode=emacs
+ [...]
+ $endif
+
+F7) Why do bash-2.05a and bash-2.05b fail to compile `printf.def' on
+ HP/UX 11.x?
+
+HP/UX's support for long double is imperfect at best.
+
+GCC will support it without problems, but the HP C library functions
+like strtold(3) and printf(3) don't actually work with long doubles.
+HP implemented a `long_double' type as a 4-element array of 32-bit
+ints, and that is what the library functions use. The ANSI C
+`long double' type is a 128-bit floating point scalar.
+
+The easiest fix, until HP fixes things up, is to edit the generated
+config.h and #undef the HAVE_LONG_DOUBLE line. After doing that,
+the compilation should complete successfully.
+
+Section G: How can I get bash to do certain common things?
+
+G1) How can I get bash to read and display eight-bit characters?
+
+This is a process requiring several steps.
+
+First, you must ensure that the `physical' data path is a full eight
+bits. For xterms, for example, the `vt100' resources `eightBitInput'
+and `eightBitOutput' should be set to `true'.
+
+Once you have set up an eight-bit path, you must tell the kernel and
+tty driver to leave the eighth bit of characters alone when processing
+keyboard input. Use `stty' to do this:
+
+ stty cs8 -istrip -parenb
+
+For old BSD-style systems, you can use
+
+ stty pass8
+
+You may also need
+
+ stty even odd
+
+Finally, you need to tell readline that you will be inputting and
+displaying eight-bit characters. You use readline variables to do
+this. These variables can be set in your .inputrc or using the bash
+`bind' builtin. Here's an example using `bind':
+
+ bash$ bind 'set convert-meta off'
+ bash$ bind 'set meta-flag on'
+ bash$ bind 'set output-meta on'
+
+The `set' commands between the single quotes may also be placed
+in ~/.inputrc.
+
+G2) How do I write a function `x' to replace builtin command `x', but
+ still invoke the command from within the function?
+
+This is why the `command' and `builtin' builtins exist. The
+`command' builtin executes the command supplied as its first
+argument, skipping over any function defined with that name. The
+`builtin' builtin executes the builtin command given as its first
+argument directly.
+
+For example, to write a function to replace `cd' that writes the
+hostname and current directory to an xterm title bar, use
+something like the following:
+
+ cd()
+ {
+ builtin cd "$@" && xtitle "$HOST: $PWD"
+ }
+
+This could also be written using `command' instead of `builtin';
+the version above is marginally more efficient.
+
+G3) How can I find the value of a shell variable whose name is the value
+ of another shell variable?
+
+Versions of Bash newer than Bash-2.0 support this directly. You can use
+
+ ${!var}
+
+For example, the following sequence of commands will echo `z':
+
+ var1=var2
+ var2=z
+ echo ${!var1}
+
+For sh compatibility, use the `eval' builtin. The important
+thing to remember is that `eval' expands the arguments you give
+it again, so you need to quote the parts of the arguments that
+you want `eval' to act on.
+
+For example, this expression prints the value of the last positional
+parameter:
+
+ eval echo \"\$\{$#\}\"
+
+The expansion of the quoted portions of this expression will be
+deferred until `eval' runs, while the `$#' will be expanded
+before `eval' is executed. In versions of bash later than bash-2.0,
+
+ echo ${!#}
+
+does the same thing.
+
+This is not the same thing as ksh93 `nameref' variables, though the syntax
+is similar. I may add namerefs in a future bash version.
+
+G4) How can I make the bash `time' reserved word print timing output that
+ looks like the output from my system's /usr/bin/time?
+
+The bash command timing code looks for a variable `TIMEFORMAT' and
+uses its value as a format string to decide how to display the
+timing statistics.
+
+The value of TIMEFORMAT is a string with `%' escapes expanded in a
+fashion similar in spirit to printf(3). The manual page explains
+the meanings of the escape sequences in the format string.
+
+If TIMEFORMAT is not set, bash acts as if the following assignment had
+been performed:
+
+ TIMEFORMAT=$'\nreal\t%3lR\nuser\t%3lU\nsys\t%3lS'
+
+The POSIX.2 default time format (used by `time -p command') is
+
+ TIMEFORMAT=$'real %2R\nuser %2U\nsys %2S'
+
+The BSD /usr/bin/time format can be emulated with:
+
+ TIMEFORMAT=$'\t%1R real\t%1U user\t%1S sys'
+
+The System V /usr/bin/time format can be emulated with:
+
+ TIMEFORMAT=$'\nreal\t%1R\nuser\t%1U\nsys\t%1S'
+
+The ksh format can be emulated with:
+
+ TIMEFORMAT=$'\nreal\t%2lR\nuser\t%2lU\nsys\t%2lS'
+
+G5) How do I get the current directory into my prompt?
+
+Bash provides a number of backslash-escape sequences which are expanded
+when the prompt string (PS1 or PS2) is displayed. The full list is in
+the manual page.
+
+The \w expansion gives the full pathname of the current directory, with
+a tilde (`~') substituted for the current value of $HOME. The \W
+expansion gives the basename of the current directory. To put the full
+pathname of the current directory into the path without any tilde
+subsitution, use $PWD. Here are some examples:
+
+ PS1='\w$ ' # current directory with tilde
+ PS1='\W$ ' # basename of current directory
+ PS1='$PWD$ ' # full pathname of current directory
+
+The single quotes are important in the final example to prevent $PWD from
+being expanded when the assignment to PS1 is performed.
+
+G6) How can I rename "*.foo" to "*.bar"?
+
+Use the pattern removal functionality described in D3. The following `for'
+loop will do the trick:
+
+ for f in *.foo; do
+ mv $f ${f%foo}bar
+ done
+
+G7) How can I translate a filename from uppercase to lowercase?
+
+The script examples/functions/lowercase, originally written by John DuBois,
+will do the trick. The converse is left as an exercise.
+
+G8) How can I write a filename expansion (globbing) pattern that will match
+ all files in the current directory except "." and ".."?
+
+You must have set the `extglob' shell option using `shopt -s extglob' to use
+this:
+
+ echo .!(.|) *
+
+A solution that works without extended globbing is given in the Unix Shell
+FAQ, posted periodically to comp.unix.shell.
+
+Section H: Where do I go from here?
+
+H1) How do I report bugs in bash, and where should I look for fixes and
+ advice?
+
+Use the `bashbug' script to report bugs. It is built and
+installed at the same time as bash. It provides a standard
+template for reporting a problem and automatically includes
+information about your configuration and build environment.
+
+`bashbug' sends its reports to bug-bash@gnu.org, which
+is a large mailing list gatewayed to the usenet newsgroup gnu.bash.bug.
+
+Bug fixes, answers to questions, and announcements of new releases
+are all posted to gnu.bash.bug. Discussions concerning bash features
+and problems also take place there.
+
+To reach the bash maintainers directly, send mail to
+bash-maintainers@gnu.org.
+
+H2) What kind of bash documentation is there?
+
+First, look in the doc directory in the bash distribution. It should
+contain at least the following files:
+
+bash.1 an extensive, thorough Unix-style manual page
+builtins.1 a manual page covering just bash builtin commands
+bashref.texi a reference manual in GNU tex`info format
+bashref.info an info version of the reference manual
+FAQ this file
+article.ms text of an article written for The Linux Journal
+readline.3 a man page describing readline
+
+Postscript, HTML, and ASCII files created from the above source are
+available in the documentation distribution.
+
+There is additional documentation available for anonymous FTP from host
+ftp.cwru.edu in the `pub/bash' directory.
+
+Cameron Newham and Bill Rosenblatt have written a book on bash, published
+by O'Reilly and Associates. The book is based on Bill Rosenblatt's Korn
+Shell book. The title is ``Learning the Bash Shell'', and the ISBN number
+is 1-56592-147-X. Look for it in fine bookstores near you. This book
+covers bash-1.14, but has an appendix describing some of the new features
+in bash-2.0.
+
+A second edition of this book is available, published in January, 1998.
+The ISBN number is 1-56592-347-2. Look for it in the same fine bookstores
+or on the web.
+
+The GNU Bash Reference Manual has been published as a printed book by
+Network Theory Ltd (Paperback, ISBN: 0-9541617-7-7, Feb 2003). It covers
+bash-2.0 and is available from most online bookstores (see
+http://www.network-theory.co.uk/bash/manual/ for details). The publisher
+will donate $1 to the Free Software Foundation for each copy sold.
+
+H3) What's coming in future versions?
+
+These are features I hope to include in a future version of bash.
+
+a better bash debugger (a minimally-tested version is included with bash-2.05b)
+associative arrays
+co-processes, but with a new-style syntax that looks like function declaration
+
+H4) What's on the bash `wish list' for future versions?
+
+These are features that may or may not appear in a future version of bash.
+
+breaking some of the shell functionality into embeddable libraries
+a module system like zsh's, using dynamic loading like builtins
+better internationalization using GNU `gettext'
+date-stamped command history
+a bash programmer's guide with a chapter on creating loadable builtins
+a better loadable interface to perl with access to the shell builtins and
+ variables (contributions gratefully accepted)
+ksh93-like `nameref' variables
+ksh93-like `+=' variable assignment operator
+ksh93-like `xx.yy' variables (including some of the .sh.* variables) and
+ associated disipline functions
+Some of the new ksh93 pattern matching operators, like backreferencing
+
+H5) When will the next release appear?
+
+The next version will appear sometime in 2002. Never make predictions.
+
+
+This document is Copyright 1995-2003 by Chester Ramey.
+
+Permission is hereby granted, without written agreement and
+without license or royalty fees, to use, copy, and distribute
+this document for any purpose, provided that the above copyright
+notice appears in all copies of this document and that the
+contents of this document remain unaltered.
Shell builtin commands return a status of 0 (\fItrue\fP) if
successful, and non-zero (\fIfalse\fP) if an error occurs
while they execute.
-All builtins return an exit status of 2 to indicate incorrect usage.
+All builtins return an exit status of 2 to indicate incorrect usage,
+generally invalid options or missing arguments.
.PP
\fBBash\fP itself returns the exit status of the last command
executed, unless a syntax error occurs, in which case it exits
All of the Bash builtins return an exit status of zero if they succeed
and a non-zero status on failure, so they may be used by the
conditional and list constructs.
-All builtins return an exit status of 2 to indicate incorrect usage.
+All builtins return an exit status of 2 to indicate incorrect usage,
+generally invalid options or missing arguments.
@node Signals
@subsection Signals
--- /dev/null
+#
+# Simple makefile for the sample loadable builtins
+#
+# Copyright (C) 1996 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA.
+
+# Include some boilerplate Gnu makefile definitions.
+prefix = @prefix@
+
+exec_prefix = @exec_prefix@
+bindir = @bindir@
+libdir = @libdir@
+infodir = @infodir@
+includedir = @includedir@
+
+topdir = @top_srcdir@
+BUILD_DIR = @BUILD_DIR@
+srcdir = @srcdir@
+VPATH = .:@srcdir@
+
+@SET_MAKE@
+CC = @CC@
+RM = rm -f
+
+SHELL = @MAKE_SHELL@
+
+host_os = @host_os@
+host_cpu = @host_cpu@
+host_vendor = @host_vendor@
+
+CFLAGS = @CFLAGS@
+LOCAL_CFLAGS = @LOCAL_CFLAGS@
+DEFS = @DEFS@
+LOCAL_DEFS = @LOCAL_DEFS@
+
+CPPFLAGS = @CPPFLAGS@
+
+BASHINCDIR = ${topdir}/include
+
+LIBBUILD = ${BUILD_DIR}/lib
+
+INTL_LIBSRC = ${topdir}/lib/intl
+INTL_BUILDDIR = ${LIBBUILD}/intl
+INTL_INC = @INTL_INC@
+LIBINTL_H = @LIBINTL_H@
+
+CCFLAGS = $(DEFS) $(LOCAL_DEFS) $(LOCAL_CFLAGS) $(CFLAGS)
+
+#
+# These values are generated for configure by ${topdir}/support/shobj-conf.
+# If your system is not supported by that script, but includes facilities for
+# dynamic loading of shared objects, please update the script and send the
+# changes to bash-maintainers@gnu.org.
+#
+SHOBJ_CC = @SHOBJ_CC@
+SHOBJ_CFLAGS = @SHOBJ_CFLAGS@
+SHOBJ_LD = @SHOBJ_LD@
+SHOBJ_LDFLAGS = @SHOBJ_LDFLAGS@
+SHOBJ_XLDFLAGS = @SHOBJ_XLDFLAGS@
+SHOBJ_LIBS = @SHOBJ_LIBS@
+SHOBJ_STATUS = @SHOBJ_STATUS@
+
+INC = -I. -I.. -I$(topdir) -I$(topdir)/lib -I$(topdir)/builtins \
+ -I$(BASHINCDIR) -I$(BUILD_DIR) -I$(LIBBUILD) \
+ -I$(BUILD_DIR)/builtins $(INTL_INC)
+
+.c.o:
+ $(SHOBJ_CC) $(SHOBJ_CFLAGS) $(CCFLAGS) $(INC) -c -o $@ $<
+
+
+ALLPROG = print truefalse sleep pushd finfo logname basename dirname \
+ tty pathchk tee head mkdir rmdir printenv id whoami \
+ uname sync push ln unlink cut realpath getconf strftime
+OTHERPROG = necho hello cat
+
+all: $(SHOBJ_STATUS)
+
+supported: $(ALLPROG)
+others: $(OTHERPROG)
+
+unsupported:
+ @echo "Your system (${host_os}) is not supported by the"
+ @echo "${topdir}/support/shobj-conf script."
+ @echo "If your operating system provides facilities for dynamic"
+ @echo "loading of shared objects using the dlopen(3) interface,"
+ @echo "please update the script and re-run configure.
+ @echo "Please send the changes you made to bash-maintainers@gnu.org"
+ @echo "for inclusion in future bash releases."
+
+everything: supported others
+
+print: print.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ print.o $(SHOBJ_LIBS)
+
+necho: necho.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ necho.o $(SHOBJ_LIBS)
+
+getconf: getconf.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ getconf.o $(SHOBJ_LIBS)
+
+hello: hello.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ hello.o $(SHOBJ_LIBS)
+
+truefalse: truefalse.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ truefalse.o $(SHOBJ_LIBS)
+
+sleep: sleep.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ sleep.o $(SHOBJ_LIBS)
+
+finfo: finfo.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ finfo.o $(SHOBJ_LIBS)
+
+cat: cat.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ cat.o $(SHOBJ_LIBS)
+
+logname: logname.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ logname.o $(SHOBJ_LIBS)
+
+basename: basename.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ basename.o $(SHOBJ_LIBS)
+
+dirname: dirname.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ dirname.o $(SHOBJ_LIBS)
+
+tty: tty.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ tty.o $(SHOBJ_LIBS)
+
+pathchk: pathchk.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ pathchk.o $(SHOBJ_LIBS)
+
+tee: tee.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ tee.o $(SHOBJ_LIBS)
+
+mkdir: mkdir.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ mkdir.o $(SHOBJ_LIBS)
+
+rmdir: rmdir.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ rmdir.o $(SHOBJ_LIBS)
+
+head: head.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ head.o $(SHOBJ_LIBS)
+
+printenv: printenv.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ printenv.o $(SHOBJ_LIBS)
+
+id: id.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ id.o $(SHOBJ_LIBS)
+
+whoami: whoami.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ whoami.o $(SHOBJ_LIBS)
+
+uname: uname.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ uname.o $(SHOBJ_LIBS)
+
+sync: sync.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ sync.o $(SHOBJ_LIBS)
+
+push: push.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ push.o $(SHOBJ_LIBS)
+
+ln: ln.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ ln.o $(SHOBJ_LIBS)
+
+unlink: unlink.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ unlink.o $(SHOBJ_LIBS)
+
+cut: cut.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ cut.o $(SHOBJ_LIBS)
+
+realpath: realpath.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ realpath.o $(SHOBJ_LIBS)
+
+strftime: strftime.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ strftime.o $(SHOBJ_LIBS)
+
+# pushd is a special case. We use the same source that the builtin version
+# uses, with special compilation options.
+#
+pushd.c: ${topdir}/builtins/pushd.def
+ $(RM) $@
+ ${BUILD_DIR}/builtins/mkbuiltins -D ${topdir}/builtins ${topdir}/builtins/pushd.def
+
+pushd.o: pushd.c
+ $(RM) $@
+ $(SHOBJ_CC) -DHAVE_CONFIG_H -DPUSHD_AND_POPD -DLOADABLE_BUILTIN $(SHOBJ_CFLAGS) $(CFLAGS) $(CPPFLAGS) $(INC) -c -o $@ $<
+
+pushd: pushd.o
+ $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ pushd.o $(SHOBJ_LIBS)
+
+clean:
+ $(RM) $(ALLPROG) $(OTHERPROG) *.o
+ -( cd perl && ${MAKE} ${MFLAGS} $@ )
+
+mostlyclean: clean
+ -( cd perl && ${MAKE} ${MFLAGS} $@ )
+
+distclean maintainer-clean: clean
+ $(RM) Makefile pushd.c
+ -( cd perl && ${MAKE} ${MFLAGS} $@ )
+
+print.o: print.c
+truefalse.o: truefalse.c
+sleep.o: sleep.c
+finfo.o: finfo.c
+logname.o: logname.c
+basename.o: basename.c
+dirname.o: dirname.c
+tty.o: tty.c
+pathchk.o: pathchk.c
+tee.o: tee.c
+head.o: head.c
+rmdir.o: rmdir.c
+necho.o: necho.c
+getconf.o: getconf.c
+hello.o: hello.c
+cat.o: cat.c
+printenv.o: printenv.c
+id.o: id.c
+whoami.o: whoami.c
+uname.o: uname.c
+sync.o: sync.c
+push.o: push.c
+mkdir.o: mkdir.c
+realpath.o: realpath.c
+strftime.o: strftime.c
int funcnest = 0;
int funcnest_max = 0; /* bash-4.2 */
+volatile int from_return_trap = 0;
+
int lastpipe_opt = 0;
struct fd_bitmap *current_fds_to_close = (struct fd_bitmap *)NULL;
fc = tc;
+ from_return_trap = 0;
+
return_catch_flag++;
return_val = setjmp_nosigs (return_catch);
result = return_catch_value;
/* Run the RETURN trap in the function's context. */
save_current = currently_executing_command;
- run_return_trap ();
+ if (from_return_trap == 0)
+ run_return_trap ();
currently_executing_command = save_current;
}
else
--- /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; /* bash-4.2 */
+
+volatile int from_return_trap = 0;
+
+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 asynchronously.
+ 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 ();
+
+ /* Posix 2013 2.9.3.1: "the exit status of an asynchronous list
+ shall be zero." */
+ last_command_exit_value = 0;
+ 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;
+
+ line_number = for_command->line; /* for expansion error messages */
+ 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;
+#if 0
+ char *t1, *t2;
+#endif
+
+ 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
+
+#if 0
+ t1 = strescape(arg1);
+ t2 = strescape(arg2);
+ itrace("execute_cond_node: sh_regmatch on `%s' and `%s'", t1, t2);
+ free(t1);
+ free(t2);
+#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, integer;
+
+ if (words == 0)
+ return;
+
+ b = 0;
+ assoc = global = array = integer = 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 (integer)
+ w->word->flags |= W_ASSIGNINT;
+ }
+#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;
+ if ((wcmd->word->flags & W_ASSNBLTIN) && strchr (w->word->word+1, 'i'))
+ integer = 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 $? for the rest of the pipeline (or at all). */
+ if (pipe_out != NO_PIPE)
+ result = last_command_exit_value;
+ close_pipes (pipe_in, pipe_out);
+#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
+ /* Close /dev/fd file descriptors in the parent after forking the
+ last child in a (possibly one-element) pipeline. Defer this
+ until any running shell function completes. */
+ if (pipe_out == NO_PIPE && variable_context == 0) /* XXX */
+ unlink_fifo_list (); /* XXX */
+#endif
+ command_line = (char *)NULL; /* don't free this. */
+ bind_lastarg ((char *)NULL);
+ return (result);
+ }
+ }
+
+ /* If we are re-running this as the result of executing the `command'
+ builtin, do not expand the command words a second time. */
+ if ((simple_command->flags & CMD_INHIBIT_EXPANSION) == 0)
+ {
+ current_fds_to_close = fds_to_close;
+ fix_assignment_words (simple_command->words);
+ /* Pass the ignore return flag down to command substitutions */
+ if (simple_command->flags & CMD_IGNORE_RETURN) /* XXX */
+ comsub_ignore_return++;
+ words = expand_words (simple_command->words);
+ if (simple_command->flags & CMD_IGNORE_RETURN)
+ comsub_ignore_return--;
+ current_fds_to_close = (struct fd_bitmap *)NULL;
+ }
+ else
+ words = copy_word_list (simple_command->words);
+
+ /* It is possible for WORDS not to have anything left in it.
+ Perhaps all the words consisted of `$foo', and there was
+ no variable `$foo'. */
+ if (words == 0)
+ {
+ this_command_name = 0;
+ result = execute_null_command (simple_command->redirects,
+ pipe_in, pipe_out,
+ already_forked ? 0 : async);
+ if (already_forked)
+ exit (result);
+ else
+ {
+ bind_lastarg ((char *)NULL);
+ set_pipestatus_from_exit (result);
+ return (result);
+ }
+ }
+
+ lastarg = (char *)NULL;
+
+ begin_unwind_frame ("simple-command");
+
+ if (echo_command_at_execute)
+ xtrace_print_word_list (words, 1);
+
+ builtin = (sh_builtin_func_t *)NULL;
+ func = (SHELL_VAR *)NULL;
+ if ((simple_command->flags & CMD_NO_FUNCTIONS) == 0)
+ {
+ /* Posix.2 says special builtins are found before functions. We
+ don't set builtin_is_special anywhere other than here, because
+ this path is followed only when the `command' builtin is *not*
+ being used, and we don't want to exit the shell if a special
+ builtin executed with `command builtin' fails. `command' is not
+ a special builtin. */
+ if (posixly_correct)
+ {
+ builtin = find_special_builtin (words->word->word);
+ if (builtin)
+ builtin_is_special = 1;
+ }
+ if (builtin == 0)
+ func = find_function (words->word->word);
+ }
+
+ /* In POSIX mode, assignment errors in the temporary environment cause a
+ non-interactive shell to exit. */
+ if (posixly_correct && builtin_is_special && interactive_shell == 0 && tempenv_assign_error)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ jump_to_top_level (ERREXIT);
+ }
+ tempenv_assign_error = 0; /* don't care about this any more */
+
+ add_unwind_protect (dispose_words, words);
+ QUIT;
+
+ /* Bind the last word in this command to "$_" 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 possibililty. 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)
+ {
+ switch (result)
+ {
+ case EX_REDIRFAIL:
+ case EX_BADASSIGN:
+ case EX_EXPFAIL:
+ /* These errors cause non-interactive posix mode shells to exit */
+ if (posixly_correct && builtin_is_special && interactive_shell == 0)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ jump_to_top_level (ERREXIT);
+ }
+ }
+ 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
+
+if (running_trap)
+ itrace("execute_function: running_trap = %d");
+
+ 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;
+
+ from_return_trap = 0;
+
+ 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;
+ if (from_return_trap == 0)
+ 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
+ {
+ /* Make sure we get the original signal dispositions now so we don't
+ confuse the trap builtin later if the subshell tries to use it to
+ reset SIGINT/SIGQUIT. Don't call set_signal_ignored; that sets
+ the value of original_signals to SIG_IGN. Posix interpretation 751. */
+ get_original_signal (SIGINT);
+ set_signal_handler (SIGINT, SIG_IGN);
+
+ get_original_signal (SIGQUIT);
+ set_signal_handler (SIGQUIT, SIG_IGN);
+ }
+}
+
+/* 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__ */
+ }
+}
--- /dev/null
+# This makefile for Readline library documentation is in -*- text -*- mode.
+# Emacs likes it that way.
+RM = rm -f
+
+MAKEINFO = makeinfo
+TEXI2DVI = texi2dvi
+TEXI2HTML = texi2html
+QUIETPS = #set this to -q to shut up dvips
+DVIPS = dvips -D 300 $(QUIETPS) -o $@ # tricky
+
+INSTALL_DATA = cp
+infodir = /usr/local/info
+
+RLSRC = rlman.texinfo rluser.texinfo rltech.texinfo
+HISTSRC = hist.texinfo hsuser.texinfo hstech.texinfo
+
+DVIOBJ = readline.dvi history.dvi
+INFOOBJ = readline.info history.info
+PSOBJ = readline.ps history.ps
+HTMLOBJ = readline.html history.html
+
+all: info dvi html ps
+nodvi: info html
+
+readline.dvi: $(RLSRC)
+ $(TEXI2DVI) rlman.texinfo
+ mv rlman.dvi readline.dvi
+
+readline.info: $(RLSRC)
+ $(MAKEINFO) --no-split -o $@ rlman.texinfo
+
+history.dvi: ${HISTSRC}
+ $(TEXI2DVI) hist.texinfo
+ mv hist.dvi history.dvi
+
+history.info: ${HISTSRC}
+ $(MAKEINFO) --no-split -o $@ hist.texinfo
+
+readline.ps: readline.dvi
+ $(RM) $@
+ $(DVIPS) readline.dvi
+
+history.ps: history.dvi
+ $(RM) $@
+ $(DVIPS) history.dvi
+
+readline.html: ${RLSRC}
+ $(TEXI2HTML) rlman.texinfo
+ sed -e 's:rlman.html:readline.html:' -e 's:rlman_toc.html:readline_toc.html:' rlman.html > readline.html
+ sed -e 's:rlman.html:readline.html:' -e 's:rlman_toc.html:readline_toc.html:' rlman_toc.html > readline_toc.html
+ $(RM) rlman.html rlman_toc.html
+
+history.html: ${HISTSRC}
+ $(TEXI2HTML) hist.texinfo
+ sed -e 's:hist.html:history.html:' -e 's:hist_toc.html:history_toc.html:' hist.html > history.html
+ sed -e 's:hist.html:history.html:' -e 's:hist_toc.html:history_toc.html:' hist_toc.html > history_toc.html
+ $(RM) hist.html hist_toc.html
+
+info: $(INFOOBJ)
+dvi: $(DVIOBJ)
+ps: $(PSOBJ)
+html: $(HTMLOBJ)
+
+clean:
+ $(RM) *.aux *.cp *.fn *.ky *.log *.pg *.toc *.tp *.vr *.cps *.pgs \
+ *.fns *.kys *.tps *.vrs *.o core
+
+distclean: clean
+mostlyclean: clean
+
+maintainer-clean: clean
+ $(RM) *.dvi *.info *.info-* *.ps *.html
+
+install: info
+ ${INSTALL_DATA} readline.info $(infodir)/readline.info
+ ${INSTALL_DATA} history.info $(infodir)/history.info
/* Standard include files. stdio.h is required. */
#include <stdlib.h>
#include <unistd.h>
+#include <string.h>
/* Used for select(2) */
#include <sys/types.h>
#include <sys/select.h>
+#include <errno.h>
#include <stdio.h>
/* Standard readline include files. */
-#include <readline/readline.h>
-#include <readline/history.h>
+#if defined (READLINE_LIBRARY)
+# include "readline.h"
+# include "history.h"
+#else
+# include <readline/readline.h>
+# include <readline/history.h>
+#endif
+
+extern int errno;
static void cb_linehandler (char *);
FD_SET (fileno (rl_instream), &fds);
r = select (FD_SETSIZE, &fds, NULL, NULL, NULL);
- if (r < 0)
+ if (r < 0 && errno != EINTR)
{
perror ("rltest: select");
rl_callback_handler_remove ();
#if defined (VI_MODE)
if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap &&
key != ANYOTHERKEY &&
- rl_key_sequence_length == 1 && /* XXX */
+ _rl_dispatching_keymap == vi_movement_keymap &&
_rl_vi_textmod_command (key))
_rl_vi_set_last (key, rl_numeric_arg, rl_arg_sign);
#endif
extern void _rl_vi_reset_last PARAMS((void));
extern void _rl_vi_set_last PARAMS((int, int, int));
extern int _rl_vi_textmod_command PARAMS((int));
+extern int _rl_vi_motion_command PARAMS((int));
extern void _rl_vi_done_inserting PARAMS((void));
extern int _rl_vi_domove_callback PARAMS((_rl_vimotion_cxt *));
return (member (c, vi_textmod));
}
+int
+_rl_vi_motion_command (c)
+ int c;
+{
+ return (member (c, vi_motion));
+}
+
static void
_rl_vi_replace_insert (count)
int count;
within a double-quoted ${...} construct "an even number of
unescaped double-quotes or single-quotes, if any, shall occur." */
/* This was changed in Austin Group Interp 221 */
- if MBTEST(posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && (flags & P_DQUOTE) && (flags & P_DOLBRACE) && ch == '\'')
+ if MBTEST(posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && dolbrace_state != DOLBRACE_QUOTE2 && (flags & P_DQUOTE) && (flags & P_DOLBRACE) && ch == '\'')
continue;
/* Could also check open == '`' if we want to parse grouping constructs
--- /dev/null
+/* parse.y - Yacc grammar for bash. */
+
+/* Copyright (C) 1989-2012 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+%{
+#include "config.h"
+
+#include "bashtypes.h"
+#include "bashansi.h"
+
+#include "filecntl.h"
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
+#if defined (HAVE_LOCALE_H)
+# include <locale.h>
+#endif
+
+#include <stdio.h>
+#include "chartypes.h"
+#include <signal.h>
+
+#include "memalloc.h"
+
+#include "bashintl.h"
+
+#define NEED_STRFTIME_DECL /* used in externs.h */
+
+#include "shell.h"
+#include "typemax.h" /* SIZE_MAX if needed */
+#include "trap.h"
+#include "flags.h"
+#include "parser.h"
+#include "mailcheck.h"
+#include "test.h"
+#include "builtins.h"
+#include "builtins/common.h"
+#include "builtins/builtext.h"
+
+#include "shmbutil.h"
+
+#if defined (READLINE)
+# include "bashline.h"
+# include <readline/readline.h>
+#endif /* READLINE */
+
+#if defined (HISTORY)
+# include "bashhist.h"
+# include <readline/history.h>
+#endif /* HISTORY */
+
+#if defined (JOB_CONTROL)
+# include "jobs.h"
+#endif /* JOB_CONTROL */
+
+#if defined (ALIAS)
+# include "alias.h"
+#else
+typedef void *alias_t;
+#endif /* ALIAS */
+
+#if defined (PROMPT_STRING_DECODE)
+# ifndef _MINIX
+# include <sys/param.h>
+# endif
+# include <time.h>
+# if defined (TM_IN_SYS_TIME)
+# include <sys/types.h>
+# include <sys/time.h>
+# endif /* TM_IN_SYS_TIME */
+# include "maxpath.h"
+#endif /* PROMPT_STRING_DECODE */
+
+#define RE_READ_TOKEN -99
+#define NO_EXPANSION -100
+
+#ifdef DEBUG
+# define YYDEBUG 1
+#else
+# define YYDEBUG 0
+#endif
+
+#if defined (HANDLE_MULTIBYTE)
+# define last_shell_getc_is_singlebyte \
+ ((shell_input_line_index > 1) \
+ ? shell_input_line_property[shell_input_line_index - 1] \
+ : 1)
+# define MBTEST(x) ((x) && last_shell_getc_is_singlebyte)
+#else
+# define last_shell_getc_is_singlebyte 1
+# define MBTEST(x) ((x))
+#endif
+
+#if defined (EXTENDED_GLOB)
+extern int extended_glob;
+#endif
+
+extern int eof_encountered;
+extern int no_line_editing, running_under_emacs;
+extern int current_command_number;
+extern int sourcelevel, parse_and_execute_level;
+extern int posixly_correct;
+extern int last_command_exit_value;
+extern pid_t last_command_subst_pid;
+extern char *shell_name, *current_host_name;
+extern char *dist_version;
+extern int patch_level;
+extern int dump_translatable_strings, dump_po_strings;
+extern sh_builtin_func_t *last_shell_builtin, *this_shell_builtin;
+#if defined (BUFFERED_INPUT)
+extern int bash_input_fd_changed;
+#endif
+
+extern int errno;
+/* **************************************************************** */
+/* */
+/* "Forward" declarations */
+/* */
+/* **************************************************************** */
+
+#ifdef DEBUG
+static void debug_parser __P((int));
+#endif
+
+static int yy_getc __P((void));
+static int yy_ungetc __P((int));
+
+#if defined (READLINE)
+static int yy_readline_get __P((void));
+static int yy_readline_unget __P((int));
+#endif
+
+static int yy_string_get __P((void));
+static int yy_string_unget __P((int));
+static void rewind_input_string __P((void));
+static int yy_stream_get __P((void));
+static int yy_stream_unget __P((int));
+
+static int shell_getc __P((int));
+static void shell_ungetc __P((int));
+static void discard_until __P((int));
+
+#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
+static void push_string __P((char *, int, alias_t *));
+static void pop_string __P((void));
+static void free_string_list __P((void));
+#endif
+
+static char *read_a_line __P((int));
+
+static int reserved_word_acceptable __P((int));
+static int yylex __P((void));
+static int alias_expand_token __P((char *));
+static int time_command_acceptable __P((void));
+static int special_case_tokens __P((char *));
+static int read_token __P((int));
+static char *parse_matched_pair __P((int, int, int, int *, int));
+static char *parse_comsub __P((int, int, int, int *, int));
+#if defined (ARRAY_VARS)
+static char *parse_compound_assignment __P((int *));
+#endif
+#if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND)
+static int parse_dparen __P((int));
+static int parse_arith_cmd __P((char **, int));
+#endif
+#if defined (COND_COMMAND)
+static void cond_error __P((void));
+static COND_COM *cond_expr __P((void));
+static COND_COM *cond_or __P((void));
+static COND_COM *cond_and __P((void));
+static COND_COM *cond_term __P((void));
+static int cond_skip_newlines __P((void));
+static COMMAND *parse_cond_command __P((void));
+#endif
+#if defined (ARRAY_VARS)
+static int token_is_assignment __P((char *, int));
+static int token_is_ident __P((char *, int));
+#endif
+static int read_token_word __P((int));
+static void discard_parser_constructs __P((int));
+
+static char *error_token_from_token __P((int));
+static char *error_token_from_text __P((void));
+static void print_offending_line __P((void));
+static void report_syntax_error __P((char *));
+
+static void handle_eof_input_unit __P((void));
+static void prompt_again __P((void));
+#if 0
+static void reset_readline_prompt __P((void));
+#endif
+static void print_prompt __P((void));
+
+#if defined (HANDLE_MULTIBYTE)
+static void set_line_mbstate __P((void));
+static char *shell_input_line_property = NULL;
+#else
+# define set_line_mbstate()
+#endif
+
+extern int yyerror __P((const char *));
+
+#ifdef DEBUG
+extern int yydebug;
+#endif
+
+/* Default prompt strings */
+char *primary_prompt = PPROMPT;
+char *secondary_prompt = SPROMPT;
+
+/* PROMPT_STRING_POINTER points to one of these, never to an actual string. */
+char *ps1_prompt, *ps2_prompt;
+
+/* Handle on the current prompt string. Indirectly points through
+ ps1_ or ps2_prompt. */
+char **prompt_string_pointer = (char **)NULL;
+char *current_prompt_string;
+
+/* Non-zero means we expand aliases in commands. */
+int expand_aliases = 0;
+
+/* If non-zero, the decoded prompt string undergoes parameter and
+ variable substitution, command substitution, arithmetic substitution,
+ string expansion, process substitution, and quote removal in
+ decode_prompt_string. */
+int promptvars = 1;
+
+/* If non-zero, $'...' and $"..." are expanded when they appear within
+ a ${...} expansion, even when the expansion appears within double
+ quotes. */
+int extended_quote = 1;
+
+/* The number of lines read from input while creating the current command. */
+int current_command_line_count;
+
+/* The number of lines in a command saved while we run parse_and_execute */
+int saved_command_line_count;
+
+/* The token that currently denotes the end of parse. */
+int shell_eof_token;
+
+/* The token currently being read. */
+int current_token;
+
+/* The current parser state. */
+int parser_state;
+
+/* Variables to manage the task of reading here documents, because we need to
+ defer the reading until after a complete command has been collected. */
+static REDIRECT *redir_stack[10];
+int need_here_doc;
+
+/* Where shell input comes from. History expansion is performed on each
+ line when the shell is interactive. */
+static char *shell_input_line = (char *)NULL;
+static size_t shell_input_line_index;
+static size_t shell_input_line_size; /* Amount allocated for shell_input_line. */
+static size_t shell_input_line_len; /* strlen (shell_input_line) */
+
+/* Either zero or EOF. */
+static int shell_input_line_terminator;
+
+/* The line number in a script on which a function definition starts. */
+static int function_dstart;
+
+/* The line number in a script on which a function body starts. */
+static int function_bstart;
+
+/* The line number in a script at which an arithmetic for command starts. */
+static int arith_for_lineno;
+
+/* The decoded prompt string. Used if READLINE is not defined or if
+ editing is turned off. Analogous to current_readline_prompt. */
+static char *current_decoded_prompt;
+
+/* The last read token, or NULL. read_token () uses this for context
+ checking. */
+static int last_read_token;
+
+/* The token read prior to last_read_token. */
+static int token_before_that;
+
+/* The token read prior to token_before_that. */
+static int two_tokens_ago;
+
+static int global_extglob;
+
+/* The line number in a script where the word in a `case WORD', `select WORD'
+ or `for WORD' begins. This is a nested command maximum, since the array
+ index is decremented after a case, select, or for command is parsed. */
+#define MAX_CASE_NEST 128
+static int word_lineno[MAX_CASE_NEST];
+static int word_top = -1;
+
+/* If non-zero, it is the token that we want read_token to return
+ regardless of what text is (or isn't) present to be read. This
+ is reset by read_token. If token_to_read == WORD or
+ ASSIGNMENT_WORD, yylval.word should be set to word_desc_to_read. */
+static int token_to_read;
+static WORD_DESC *word_desc_to_read;
+
+static REDIRECTEE source;
+static REDIRECTEE redir;
+%}
+
+%union {
+ WORD_DESC *word; /* the word that we read. */
+ int number; /* the number that we read. */
+ WORD_LIST *word_list;
+ COMMAND *command;
+ REDIRECT *redirect;
+ ELEMENT element;
+ PATTERN_LIST *pattern;
+}
+
+/* Reserved words. Members of the first group are only recognized
+ in the case that they are preceded by a list_terminator. Members
+ of the second group are for [[...]] commands. Members of the
+ third group are recognized only under special circumstances. */
+%token IF THEN ELSE ELIF FI CASE ESAC FOR SELECT WHILE UNTIL DO DONE FUNCTION COPROC
+%token COND_START COND_END COND_ERROR
+%token IN BANG TIME TIMEOPT TIMEIGN
+
+/* More general tokens. yylex () knows how to make these. */
+%token <word> WORD ASSIGNMENT_WORD REDIR_WORD
+%token <number> NUMBER
+%token <word_list> ARITH_CMD ARITH_FOR_EXPRS
+%token <command> COND_CMD
+%token AND_AND OR_OR GREATER_GREATER LESS_LESS LESS_AND LESS_LESS_LESS
+%token GREATER_AND SEMI_SEMI SEMI_AND SEMI_SEMI_AND
+%token LESS_LESS_MINUS AND_GREATER AND_GREATER_GREATER LESS_GREATER
+%token GREATER_BAR BAR_AND
+
+/* The types that the various syntactical units return. */
+
+%type <command> inputunit command pipeline pipeline_command
+%type <command> list list0 list1 compound_list simple_list simple_list1
+%type <command> simple_command shell_command
+%type <command> for_command select_command case_command group_command
+%type <command> arith_command
+%type <command> cond_command
+%type <command> arith_for_command
+%type <command> coproc
+%type <command> function_def function_body if_command elif_clause subshell
+%type <redirect> redirection redirection_list
+%type <element> simple_command_element
+%type <word_list> word_list pattern
+%type <pattern> pattern_list case_clause_sequence case_clause
+%type <number> timespec
+%type <number> list_terminator
+
+%start inputunit
+
+%left '&' ';' '\n' yacc_EOF
+%left AND_AND OR_OR
+%right '|' BAR_AND
+%%
+
+inputunit: simple_list simple_list_terminator
+ {
+ /* Case of regular command. Discard the error
+ safety net,and return the command just parsed. */
+ global_command = $1;
+ eof_encountered = 0;
+ /* discard_parser_constructs (0); */
+ if (parser_state & PST_CMDSUBST)
+ parser_state |= PST_EOFTOKEN;
+ YYACCEPT;
+ }
+ | '\n'
+ {
+ /* Case of regular command, but not a very
+ interesting one. Return a NULL command. */
+ global_command = (COMMAND *)NULL;
+ if (parser_state & PST_CMDSUBST)
+ parser_state |= PST_EOFTOKEN;
+ YYACCEPT;
+ }
+ | error '\n'
+ {
+ /* Error during parsing. Return NULL command. */
+ global_command = (COMMAND *)NULL;
+ eof_encountered = 0;
+ /* discard_parser_constructs (1); */
+ if (interactive && parse_and_execute_level == 0)
+ {
+ YYACCEPT;
+ }
+ else
+ {
+ YYABORT;
+ }
+ }
+ | yacc_EOF
+ {
+ /* Case of EOF seen by itself. Do ignoreeof or
+ not. */
+ global_command = (COMMAND *)NULL;
+ handle_eof_input_unit ();
+ YYACCEPT;
+ }
+ ;
+
+word_list: WORD
+ { $$ = make_word_list ($1, (WORD_LIST *)NULL); }
+ | word_list WORD
+ { $$ = make_word_list ($2, $1); }
+ ;
+
+redirection: '>' WORD
+ {
+ source.dest = 1;
+ redir.filename = $2;
+ $$ = make_redirection (source, r_output_direction, redir, 0);
+ }
+ | '<' WORD
+ {
+ source.dest = 0;
+ redir.filename = $2;
+ $$ = make_redirection (source, r_input_direction, redir, 0);
+ }
+ | NUMBER '>' WORD
+ {
+ source.dest = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_output_direction, redir, 0);
+ }
+ | NUMBER '<' WORD
+ {
+ source.dest = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_input_direction, redir, 0);
+ }
+ | REDIR_WORD '>' WORD
+ {
+ source.filename = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_output_direction, redir, REDIR_VARASSIGN);
+ }
+ | REDIR_WORD '<' WORD
+ {
+ source.filename = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_input_direction, redir, REDIR_VARASSIGN);
+ }
+ | GREATER_GREATER WORD
+ {
+ source.dest = 1;
+ redir.filename = $2;
+ $$ = make_redirection (source, r_appending_to, redir, 0);
+ }
+ | NUMBER GREATER_GREATER WORD
+ {
+ source.dest = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_appending_to, redir, 0);
+ }
+ | REDIR_WORD GREATER_GREATER WORD
+ {
+ source.filename = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_appending_to, redir, REDIR_VARASSIGN);
+ }
+ | GREATER_BAR WORD
+ {
+ source.dest = 1;
+ redir.filename = $2;
+ $$ = make_redirection (source, r_output_force, redir, 0);
+ }
+ | NUMBER GREATER_BAR WORD
+ {
+ source.dest = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_output_force, redir, 0);
+ }
+ | REDIR_WORD GREATER_BAR WORD
+ {
+ source.filename = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_output_force, redir, REDIR_VARASSIGN);
+ }
+ | LESS_GREATER WORD
+ {
+ source.dest = 0;
+ redir.filename = $2;
+ $$ = make_redirection (source, r_input_output, redir, 0);
+ }
+ | NUMBER LESS_GREATER WORD
+ {
+ source.dest = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_input_output, redir, 0);
+ }
+ | REDIR_WORD LESS_GREATER WORD
+ {
+ source.filename = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_input_output, redir, REDIR_VARASSIGN);
+ }
+ | LESS_LESS WORD
+ {
+ source.dest = 0;
+ redir.filename = $2;
+ $$ = make_redirection (source, r_reading_until, redir, 0);
+ redir_stack[need_here_doc++] = $$;
+ }
+ | NUMBER LESS_LESS WORD
+ {
+ source.dest = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_reading_until, redir, 0);
+ redir_stack[need_here_doc++] = $$;
+ }
+ | REDIR_WORD LESS_LESS WORD
+ {
+ source.filename = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_reading_until, redir, REDIR_VARASSIGN);
+ redir_stack[need_here_doc++] = $$;
+ }
+ | LESS_LESS_MINUS WORD
+ {
+ source.dest = 0;
+ redir.filename = $2;
+ $$ = make_redirection (source, r_deblank_reading_until, redir, 0);
+ redir_stack[need_here_doc++] = $$;
+ }
+ | NUMBER LESS_LESS_MINUS WORD
+ {
+ source.dest = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_deblank_reading_until, redir, 0);
+ redir_stack[need_here_doc++] = $$;
+ }
+ | REDIR_WORD LESS_LESS_MINUS WORD
+ {
+ source.filename = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_deblank_reading_until, redir, REDIR_VARASSIGN);
+ redir_stack[need_here_doc++] = $$;
+ }
+ | LESS_LESS_LESS WORD
+ {
+ source.dest = 0;
+ redir.filename = $2;
+ $$ = make_redirection (source, r_reading_string, redir, 0);
+ }
+ | NUMBER LESS_LESS_LESS WORD
+ {
+ source.dest = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_reading_string, redir, 0);
+ }
+ | REDIR_WORD LESS_LESS_LESS WORD
+ {
+ source.filename = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_reading_string, redir, REDIR_VARASSIGN);
+ }
+ | LESS_AND NUMBER
+ {
+ source.dest = 0;
+ redir.dest = $2;
+ $$ = make_redirection (source, r_duplicating_input, redir, 0);
+ }
+ | NUMBER LESS_AND NUMBER
+ {
+ source.dest = $1;
+ redir.dest = $3;
+ $$ = make_redirection (source, r_duplicating_input, redir, 0);
+ }
+ | REDIR_WORD LESS_AND NUMBER
+ {
+ source.filename = $1;
+ redir.dest = $3;
+ $$ = make_redirection (source, r_duplicating_input, redir, REDIR_VARASSIGN);
+ }
+ | GREATER_AND NUMBER
+ {
+ source.dest = 1;
+ redir.dest = $2;
+ $$ = make_redirection (source, r_duplicating_output, redir, 0);
+ }
+ | NUMBER GREATER_AND NUMBER
+ {
+ source.dest = $1;
+ redir.dest = $3;
+ $$ = make_redirection (source, r_duplicating_output, redir, 0);
+ }
+ | REDIR_WORD GREATER_AND NUMBER
+ {
+ source.filename = $1;
+ redir.dest = $3;
+ $$ = make_redirection (source, r_duplicating_output, redir, REDIR_VARASSIGN);
+ }
+ | LESS_AND WORD
+ {
+ source.dest = 0;
+ redir.filename = $2;
+ $$ = make_redirection (source, r_duplicating_input_word, redir, 0);
+ }
+ | NUMBER LESS_AND WORD
+ {
+ source.dest = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_duplicating_input_word, redir, 0);
+ }
+ | REDIR_WORD LESS_AND WORD
+ {
+ source.filename = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_duplicating_input_word, redir, REDIR_VARASSIGN);
+ }
+ | GREATER_AND WORD
+ {
+ source.dest = 1;
+ redir.filename = $2;
+ $$ = make_redirection (source, r_duplicating_output_word, redir, 0);
+ }
+ | NUMBER GREATER_AND WORD
+ {
+ source.dest = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_duplicating_output_word, redir, 0);
+ }
+ | REDIR_WORD GREATER_AND WORD
+ {
+ source.filename = $1;
+ redir.filename = $3;
+ $$ = make_redirection (source, r_duplicating_output_word, redir, REDIR_VARASSIGN);
+ }
+ | GREATER_AND '-'
+ {
+ source.dest = 1;
+ redir.dest = 0;
+ $$ = make_redirection (source, r_close_this, redir, 0);
+ }
+ | NUMBER GREATER_AND '-'
+ {
+ source.dest = $1;
+ redir.dest = 0;
+ $$ = make_redirection (source, r_close_this, redir, 0);
+ }
+ | REDIR_WORD GREATER_AND '-'
+ {
+ source.filename = $1;
+ redir.dest = 0;
+ $$ = make_redirection (source, r_close_this, redir, REDIR_VARASSIGN);
+ }
+ | LESS_AND '-'
+ {
+ source.dest = 0;
+ redir.dest = 0;
+ $$ = make_redirection (source, r_close_this, redir, 0);
+ }
+ | NUMBER LESS_AND '-'
+ {
+ source.dest = $1;
+ redir.dest = 0;
+ $$ = make_redirection (source, r_close_this, redir, 0);
+ }
+ | REDIR_WORD LESS_AND '-'
+ {
+ source.filename = $1;
+ redir.dest = 0;
+ $$ = make_redirection (source, r_close_this, redir, REDIR_VARASSIGN);
+ }
+ | AND_GREATER WORD
+ {
+ source.dest = 1;
+ redir.filename = $2;
+ $$ = make_redirection (source, r_err_and_out, redir, 0);
+ }
+ | AND_GREATER_GREATER WORD
+ {
+ source.dest = 1;
+ redir.filename = $2;
+ $$ = make_redirection (source, r_append_err_and_out, redir, 0);
+ }
+ ;
+
+simple_command_element: WORD
+ { $$.word = $1; $$.redirect = 0; }
+ | ASSIGNMENT_WORD
+ { $$.word = $1; $$.redirect = 0; }
+ | redirection
+ { $$.redirect = $1; $$.word = 0; }
+ ;
+
+redirection_list: redirection
+ {
+ $$ = $1;
+ }
+ | redirection_list redirection
+ {
+ register REDIRECT *t;
+
+ for (t = $1; t->next; t = t->next)
+ ;
+ t->next = $2;
+ $$ = $1;
+ }
+ ;
+
+simple_command: simple_command_element
+ { $$ = make_simple_command ($1, (COMMAND *)NULL); }
+ | simple_command simple_command_element
+ { $$ = make_simple_command ($2, $1); }
+ ;
+
+command: simple_command
+ { $$ = clean_simple_command ($1); }
+ | shell_command
+ { $$ = $1; }
+ | shell_command redirection_list
+ {
+ COMMAND *tc;
+
+ tc = $1;
+ if (tc->redirects)
+ {
+ register REDIRECT *t;
+ for (t = tc->redirects; t->next; t = t->next)
+ ;
+ t->next = $2;
+ }
+ else
+ tc->redirects = $2;
+ $$ = $1;
+ }
+ | function_def
+ { $$ = $1; }
+ | coproc
+ { $$ = $1; }
+ ;
+
+shell_command: for_command
+ { $$ = $1; }
+ | case_command
+ { $$ = $1; }
+ | WHILE compound_list DO compound_list DONE
+ { $$ = make_while_command ($2, $4); }
+ | UNTIL compound_list DO compound_list DONE
+ { $$ = make_until_command ($2, $4); }
+ | select_command
+ { $$ = $1; }
+ | if_command
+ { $$ = $1; }
+ | subshell
+ { $$ = $1; }
+ | group_command
+ { $$ = $1; }
+ | arith_command
+ { $$ = $1; }
+ | cond_command
+ { $$ = $1; }
+ | arith_for_command
+ { $$ = $1; }
+ ;
+
+for_command: FOR WORD newline_list DO compound_list DONE
+ {
+ $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | FOR WORD newline_list '{' compound_list '}'
+ {
+ $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | FOR WORD ';' newline_list DO compound_list DONE
+ {
+ $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | FOR WORD ';' newline_list '{' compound_list '}'
+ {
+ $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | FOR WORD newline_list IN word_list list_terminator newline_list DO compound_list DONE
+ {
+ $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | FOR WORD newline_list IN word_list list_terminator newline_list '{' compound_list '}'
+ {
+ $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | FOR WORD newline_list IN list_terminator newline_list DO compound_list DONE
+ {
+ $$ = make_for_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | FOR WORD newline_list IN list_terminator newline_list '{' compound_list '}'
+ {
+ $$ = make_for_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ ;
+
+arith_for_command: FOR ARITH_FOR_EXPRS list_terminator newline_list DO compound_list DONE
+ {
+ $$ = make_arith_for_command ($2, $6, arith_for_lineno);
+ if (word_top > 0) word_top--;
+ }
+ | FOR ARITH_FOR_EXPRS list_terminator newline_list '{' compound_list '}'
+ {
+ $$ = make_arith_for_command ($2, $6, arith_for_lineno);
+ if (word_top > 0) word_top--;
+ }
+ | FOR ARITH_FOR_EXPRS DO compound_list DONE
+ {
+ $$ = make_arith_for_command ($2, $4, arith_for_lineno);
+ if (word_top > 0) word_top--;
+ }
+ | FOR ARITH_FOR_EXPRS '{' compound_list '}'
+ {
+ $$ = make_arith_for_command ($2, $4, arith_for_lineno);
+ if (word_top > 0) word_top--;
+ }
+ ;
+
+select_command: SELECT WORD newline_list DO list DONE
+ {
+ $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | SELECT WORD newline_list '{' list '}'
+ {
+ $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | SELECT WORD ';' newline_list DO list DONE
+ {
+ $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | SELECT WORD ';' newline_list '{' list '}'
+ {
+ $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | SELECT WORD newline_list IN word_list list_terminator newline_list DO list DONE
+ {
+ $$ = make_select_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | SELECT WORD newline_list IN word_list list_terminator newline_list '{' list '}'
+ {
+ $$ = make_select_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ ;
+
+case_command: CASE WORD newline_list IN newline_list ESAC
+ {
+ $$ = make_case_command ($2, (PATTERN_LIST *)NULL, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | CASE WORD newline_list IN case_clause_sequence newline_list ESAC
+ {
+ $$ = make_case_command ($2, $5, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ | CASE WORD newline_list IN case_clause ESAC
+ {
+ $$ = make_case_command ($2, $5, word_lineno[word_top]);
+ if (word_top > 0) word_top--;
+ }
+ ;
+
+function_def: WORD '(' ')' newline_list function_body
+ { $$ = make_function_def ($1, $5, function_dstart, function_bstart); }
+
+ | FUNCTION WORD '(' ')' newline_list function_body
+ { $$ = make_function_def ($2, $6, function_dstart, function_bstart); }
+
+ | FUNCTION WORD newline_list function_body
+ { $$ = make_function_def ($2, $4, function_dstart, function_bstart); }
+ ;
+
+function_body: shell_command
+ { $$ = $1; }
+ | shell_command redirection_list
+ {
+ COMMAND *tc;
+
+ tc = $1;
+ /* According to Posix.2 3.9.5, redirections
+ specified after the body of a function should
+ be attached to the function and performed when
+ the function is executed, not as part of the
+ function definition command. */
+ /* XXX - I don't think it matters, but we might
+ want to change this in the future to avoid
+ problems differentiating between a function
+ definition with a redirection and a function
+ definition containing a single command with a
+ redirection. The two are semantically equivalent,
+ though -- the only difference is in how the
+ command printing code displays the redirections. */
+ if (tc->redirects)
+ {
+ register REDIRECT *t;
+ for (t = tc->redirects; t->next; t = t->next)
+ ;
+ t->next = $2;
+ }
+ else
+ tc->redirects = $2;
+ $$ = $1;
+ }
+ ;
+
+subshell: '(' compound_list ')'
+ {
+ $$ = make_subshell_command ($2);
+ $$->flags |= CMD_WANT_SUBSHELL;
+ }
+ ;
+
+coproc: COPROC shell_command
+ {
+ $$ = make_coproc_command ("COPROC", $2);
+ $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL;
+ }
+ | COPROC shell_command redirection_list
+ {
+ COMMAND *tc;
+
+ tc = $2;
+ if (tc->redirects)
+ {
+ register REDIRECT *t;
+ for (t = tc->redirects; t->next; t = t->next)
+ ;
+ t->next = $3;
+ }
+ else
+ tc->redirects = $3;
+ $$ = make_coproc_command ("COPROC", $2);
+ $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL;
+ }
+ | COPROC WORD shell_command
+ {
+ $$ = make_coproc_command ($2->word, $3);
+ $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL;
+ }
+ | COPROC WORD shell_command redirection_list
+ {
+ COMMAND *tc;
+
+ tc = $3;
+ if (tc->redirects)
+ {
+ register REDIRECT *t;
+ for (t = tc->redirects; t->next; t = t->next)
+ ;
+ t->next = $4;
+ }
+ else
+ tc->redirects = $4;
+ $$ = make_coproc_command ($2->word, $3);
+ $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL;
+ }
+ | COPROC simple_command
+ {
+ $$ = make_coproc_command ("COPROC", clean_simple_command ($2));
+ $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL;
+ }
+ ;
+
+if_command: IF compound_list THEN compound_list FI
+ { $$ = make_if_command ($2, $4, (COMMAND *)NULL); }
+ | IF compound_list THEN compound_list ELSE compound_list FI
+ { $$ = make_if_command ($2, $4, $6); }
+ | IF compound_list THEN compound_list elif_clause FI
+ { $$ = make_if_command ($2, $4, $5); }
+ ;
+
+
+group_command: '{' compound_list '}'
+ { $$ = make_group_command ($2); }
+ ;
+
+arith_command: ARITH_CMD
+ { $$ = make_arith_command ($1); }
+ ;
+
+cond_command: COND_START COND_CMD COND_END
+ { $$ = $2; }
+ ;
+
+elif_clause: ELIF compound_list THEN compound_list
+ { $$ = make_if_command ($2, $4, (COMMAND *)NULL); }
+ | ELIF compound_list THEN compound_list ELSE compound_list
+ { $$ = make_if_command ($2, $4, $6); }
+ | ELIF compound_list THEN compound_list elif_clause
+ { $$ = make_if_command ($2, $4, $5); }
+ ;
+
+case_clause: pattern_list
+ | case_clause_sequence pattern_list
+ { $2->next = $1; $$ = $2; }
+ ;
+
+pattern_list: newline_list pattern ')' compound_list
+ { $$ = make_pattern_list ($2, $4); }
+ | newline_list pattern ')' newline_list
+ { $$ = make_pattern_list ($2, (COMMAND *)NULL); }
+ | newline_list '(' pattern ')' compound_list
+ { $$ = make_pattern_list ($3, $5); }
+ | newline_list '(' pattern ')' newline_list
+ { $$ = make_pattern_list ($3, (COMMAND *)NULL); }
+ ;
+
+case_clause_sequence: pattern_list SEMI_SEMI
+ { $$ = $1; }
+ | case_clause_sequence pattern_list SEMI_SEMI
+ { $2->next = $1; $$ = $2; }
+ | pattern_list SEMI_AND
+ { $1->flags |= CASEPAT_FALLTHROUGH; $$ = $1; }
+ | case_clause_sequence pattern_list SEMI_AND
+ { $2->flags |= CASEPAT_FALLTHROUGH; $2->next = $1; $$ = $2; }
+ | pattern_list SEMI_SEMI_AND
+ { $1->flags |= CASEPAT_TESTNEXT; $$ = $1; }
+ | case_clause_sequence pattern_list SEMI_SEMI_AND
+ { $2->flags |= CASEPAT_TESTNEXT; $2->next = $1; $$ = $2; }
+ ;
+
+pattern: WORD
+ { $$ = make_word_list ($1, (WORD_LIST *)NULL); }
+ | pattern '|' WORD
+ { $$ = make_word_list ($3, $1); }
+ ;
+
+/* A list allows leading or trailing newlines and
+ newlines as operators (equivalent to semicolons).
+ It must end with a newline or semicolon.
+ Lists are used within commands such as if, for, while. */
+
+list: newline_list list0
+ {
+ $$ = $2;
+ if (need_here_doc)
+ gather_here_documents ();
+ }
+ ;
+
+compound_list: list
+ | newline_list list1
+ {
+ $$ = $2;
+ }
+ ;
+
+list0: list1 '\n' newline_list
+ | list1 '&' newline_list
+ {
+ if ($1->type == cm_connection)
+ $$ = connect_async_list ($1, (COMMAND *)NULL, '&');
+ else
+ $$ = command_connect ($1, (COMMAND *)NULL, '&');
+ }
+ | list1 ';' newline_list
+
+ ;
+
+list1: list1 AND_AND newline_list list1
+ { $$ = command_connect ($1, $4, AND_AND); }
+ | list1 OR_OR newline_list list1
+ { $$ = command_connect ($1, $4, OR_OR); }
+ | list1 '&' newline_list list1
+ {
+ if ($1->type == cm_connection)
+ $$ = connect_async_list ($1, $4, '&');
+ else
+ $$ = command_connect ($1, $4, '&');
+ }
+ | list1 ';' newline_list list1
+ { $$ = command_connect ($1, $4, ';'); }
+ | list1 '\n' newline_list list1
+ { $$ = command_connect ($1, $4, ';'); }
+ | pipeline_command
+ { $$ = $1; }
+ ;
+
+simple_list_terminator: '\n'
+ | yacc_EOF
+ ;
+
+list_terminator:'\n'
+ { $$ = '\n'; }
+ | ';'
+ { $$ = ';'; }
+ | yacc_EOF
+ { $$ = yacc_EOF; }
+ ;
+
+newline_list:
+ | newline_list '\n'
+ ;
+
+/* A simple_list is a list that contains no significant newlines
+ and no leading or trailing newlines. Newlines are allowed
+ only following operators, where they are not significant.
+
+ This is what an inputunit consists of. */
+
+simple_list: simple_list1
+ {
+ $$ = $1;
+ if (need_here_doc)
+ gather_here_documents ();
+ if ((parser_state & PST_CMDSUBST) && current_token == shell_eof_token)
+ {
+ global_command = $1;
+ eof_encountered = 0;
+ rewind_input_string ();
+ YYACCEPT;
+ }
+ }
+ | simple_list1 '&'
+ {
+ if ($1->type == cm_connection)
+ $$ = connect_async_list ($1, (COMMAND *)NULL, '&');
+ else
+ $$ = command_connect ($1, (COMMAND *)NULL, '&');
+ if (need_here_doc)
+ gather_here_documents ();
+ if ((parser_state & PST_CMDSUBST) && current_token == shell_eof_token)
+ {
+ global_command = $1;
+ eof_encountered = 0;
+ rewind_input_string ();
+ YYACCEPT;
+ }
+ }
+ | simple_list1 ';'
+ {
+ $$ = $1;
+ if (need_here_doc)
+ gather_here_documents ();
+ if ((parser_state & PST_CMDSUBST) && current_token == shell_eof_token)
+ {
+ global_command = $1;
+ eof_encountered = 0;
+ rewind_input_string ();
+ YYACCEPT;
+ }
+ }
+ ;
+
+simple_list1: simple_list1 AND_AND newline_list simple_list1
+ { $$ = command_connect ($1, $4, AND_AND); }
+ | simple_list1 OR_OR newline_list simple_list1
+ { $$ = command_connect ($1, $4, OR_OR); }
+ | simple_list1 '&' simple_list1
+ {
+ if ($1->type == cm_connection)
+ $$ = connect_async_list ($1, $3, '&');
+ else
+ $$ = command_connect ($1, $3, '&');
+ }
+ | simple_list1 ';' simple_list1
+ { $$ = command_connect ($1, $3, ';'); }
+
+ | pipeline_command
+ { $$ = $1; }
+ ;
+
+pipeline_command: pipeline
+ { $$ = $1; }
+ | BANG pipeline_command
+ {
+ if ($2)
+ $2->flags ^= CMD_INVERT_RETURN; /* toggle */
+ $$ = $2;
+ }
+ | timespec pipeline_command
+ {
+ if ($2)
+ $2->flags |= $1;
+ $$ = $2;
+ }
+ | timespec list_terminator
+ {
+ ELEMENT x;
+
+ /* Boy, this is unclean. `time' by itself can
+ time a null command. We cheat and push a
+ newline back if the list_terminator was a newline
+ to avoid the double-newline problem (one to
+ terminate this, one to terminate the command) */
+ x.word = 0;
+ x.redirect = 0;
+ $$ = make_simple_command (x, (COMMAND *)NULL);
+ $$->flags |= $1;
+ /* XXX - let's cheat and push a newline back */
+ if ($2 == '\n')
+ token_to_read = '\n';
+ }
+ | BANG list_terminator
+ {
+ ELEMENT x;
+
+ /* This is just as unclean. Posix says that `!'
+ by itself should be equivalent to `false'.
+ We cheat and push a
+ newline back if the list_terminator was a newline
+ to avoid the double-newline problem (one to
+ terminate this, one to terminate the command) */
+ x.word = 0;
+ x.redirect = 0;
+ $$ = make_simple_command (x, (COMMAND *)NULL);
+ $$->flags |= CMD_INVERT_RETURN;
+ /* XXX - let's cheat and push a newline back */
+ if ($2 == '\n')
+ token_to_read = '\n';
+ }
+ ;
+
+pipeline: pipeline '|' newline_list pipeline
+ { $$ = command_connect ($1, $4, '|'); }
+ | pipeline BAR_AND newline_list pipeline
+ {
+ /* Make cmd1 |& cmd2 equivalent to cmd1 2>&1 | cmd2 */
+ COMMAND *tc;
+ REDIRECTEE rd, sd;
+ REDIRECT *r;
+
+ tc = $1->type == cm_simple ? (COMMAND *)$1->value.Simple : $1;
+ sd.dest = 2;
+ rd.dest = 1;
+ r = make_redirection (sd, r_duplicating_output, rd, 0);
+ if (tc->redirects)
+ {
+ register REDIRECT *t;
+ for (t = tc->redirects; t->next; t = t->next)
+ ;
+ t->next = r;
+ }
+ else
+ tc->redirects = r;
+
+ $$ = command_connect ($1, $4, '|');
+ }
+ | command
+ { $$ = $1; }
+ ;
+
+timespec: TIME
+ { $$ = CMD_TIME_PIPELINE; }
+ | TIME TIMEOPT
+ { $$ = CMD_TIME_PIPELINE|CMD_TIME_POSIX; }
+ | TIME TIMEOPT TIMEIGN
+ { $$ = CMD_TIME_PIPELINE|CMD_TIME_POSIX; }
+ ;
+%%
+
+/* Initial size to allocate for tokens, and the
+ amount to grow them by. */
+#define TOKEN_DEFAULT_INITIAL_SIZE 496
+#define TOKEN_DEFAULT_GROW_SIZE 512
+
+/* Should we call prompt_again? */
+#define SHOULD_PROMPT() \
+ (interactive && (bash_input.type == st_stdin || bash_input.type == st_stream))
+
+#if defined (ALIAS)
+# define expanding_alias() (pushed_string_list && pushed_string_list->expander)
+#else
+# define expanding_alias() 0
+#endif
+
+/* Global var is non-zero when end of file has been reached. */
+int EOF_Reached = 0;
+
+#ifdef DEBUG
+static void
+debug_parser (i)
+ int i;
+{
+#if YYDEBUG != 0
+ yydebug = i;
+#endif
+}
+#endif
+
+/* yy_getc () returns the next available character from input or EOF.
+ yy_ungetc (c) makes `c' the next character to read.
+ init_yy_io (get, unget, type, location) makes the function GET the
+ installed function for getting the next character, makes UNGET the
+ installed function for un-getting a character, sets the type of stream
+ (either string or file) from TYPE, and makes LOCATION point to where
+ the input is coming from. */
+
+/* Unconditionally returns end-of-file. */
+int
+return_EOF ()
+{
+ return (EOF);
+}
+
+/* Variable containing the current get and unget functions.
+ See ./input.h for a clearer description. */
+BASH_INPUT bash_input;
+
+/* Set all of the fields in BASH_INPUT to NULL. Free bash_input.name if it
+ is non-null, avoiding a memory leak. */
+void
+initialize_bash_input ()
+{
+ bash_input.type = st_none;
+ FREE (bash_input.name);
+ bash_input.name = (char *)NULL;
+ bash_input.location.file = (FILE *)NULL;
+ bash_input.location.string = (char *)NULL;
+ bash_input.getter = (sh_cget_func_t *)NULL;
+ bash_input.ungetter = (sh_cunget_func_t *)NULL;
+}
+
+/* Set the contents of the current bash input stream from
+ GET, UNGET, TYPE, NAME, and LOCATION. */
+void
+init_yy_io (get, unget, type, name, location)
+ sh_cget_func_t *get;
+ sh_cunget_func_t *unget;
+ enum stream_type type;
+ const char *name;
+ INPUT_STREAM location;
+{
+ bash_input.type = type;
+ FREE (bash_input.name);
+ bash_input.name = name ? savestring (name) : (char *)NULL;
+
+ /* XXX */
+#if defined (CRAY)
+ memcpy((char *)&bash_input.location.string, (char *)&location.string, sizeof(location));
+#else
+ bash_input.location = location;
+#endif
+ bash_input.getter = get;
+ bash_input.ungetter = unget;
+}
+
+char *
+yy_input_name ()
+{
+ return (bash_input.name ? bash_input.name : "stdin");
+}
+
+/* Call this to get the next character of input. */
+static int
+yy_getc ()
+{
+ return (*(bash_input.getter)) ();
+}
+
+/* Call this to unget C. That is, to make C the next character
+ to be read. */
+static int
+yy_ungetc (c)
+ int c;
+{
+ return (*(bash_input.ungetter)) (c);
+}
+
+#if defined (BUFFERED_INPUT)
+#ifdef INCLUDE_UNUSED
+int
+input_file_descriptor ()
+{
+ switch (bash_input.type)
+ {
+ case st_stream:
+ return (fileno (bash_input.location.file));
+ case st_bstream:
+ return (bash_input.location.buffered_fd);
+ case st_stdin:
+ default:
+ return (fileno (stdin));
+ }
+}
+#endif
+#endif /* BUFFERED_INPUT */
+
+/* **************************************************************** */
+/* */
+/* Let input be read from readline (). */
+/* */
+/* **************************************************************** */
+
+#if defined (READLINE)
+char *current_readline_prompt = (char *)NULL;
+char *current_readline_line = (char *)NULL;
+int current_readline_line_index = 0;
+
+static int
+yy_readline_get ()
+{
+ SigHandler *old_sigint;
+ int line_len;
+ unsigned char c;
+
+ if (!current_readline_line)
+ {
+ if (!bash_readline_initialized)
+ initialize_readline ();
+
+#if defined (JOB_CONTROL)
+ if (job_control)
+ give_terminal_to (shell_pgrp, 0);
+#endif /* JOB_CONTROL */
+
+ old_sigint = (SigHandler *)IMPOSSIBLE_TRAP_HANDLER;
+ if (signal_is_ignored (SIGINT) == 0)
+ {
+ /* interrupt_immediately++; */
+ old_sigint = (SigHandler *)set_signal_handler (SIGINT, sigint_sighandler);
+ }
+
+ current_readline_line = readline (current_readline_prompt ?
+ current_readline_prompt : "");
+
+ CHECK_TERMSIG;
+ if (signal_is_ignored (SIGINT) == 0)
+ {
+ /* interrupt_immediately--; */
+ if (old_sigint != IMPOSSIBLE_TRAP_HANDLER)
+ set_signal_handler (SIGINT, old_sigint);
+ }
+
+#if 0
+ /* Reset the prompt to the decoded value of prompt_string_pointer. */
+ reset_readline_prompt ();
+#endif
+
+ if (current_readline_line == 0)
+ return (EOF);
+
+ current_readline_line_index = 0;
+ line_len = strlen (current_readline_line);
+
+ current_readline_line = (char *)xrealloc (current_readline_line, 2 + line_len);
+ current_readline_line[line_len++] = '\n';
+ current_readline_line[line_len] = '\0';
+ }
+
+ if (current_readline_line[current_readline_line_index] == 0)
+ {
+ free (current_readline_line);
+ current_readline_line = (char *)NULL;
+ return (yy_readline_get ());
+ }
+ else
+ {
+ c = current_readline_line[current_readline_line_index++];
+ return (c);
+ }
+}
+
+static int
+yy_readline_unget (c)
+ int c;
+{
+ if (current_readline_line_index && current_readline_line)
+ current_readline_line[--current_readline_line_index] = c;
+ return (c);
+}
+
+void
+with_input_from_stdin ()
+{
+ INPUT_STREAM location;
+
+ if (bash_input.type != st_stdin && stream_on_stack (st_stdin) == 0)
+ {
+ location.string = current_readline_line;
+ init_yy_io (yy_readline_get, yy_readline_unget,
+ st_stdin, "readline stdin", location);
+ }
+}
+
+#else /* !READLINE */
+
+void
+with_input_from_stdin ()
+{
+ with_input_from_stream (stdin, "stdin");
+}
+#endif /* !READLINE */
+
+/* **************************************************************** */
+/* */
+/* Let input come from STRING. STRING is zero terminated. */
+/* */
+/* **************************************************************** */
+
+static int
+yy_string_get ()
+{
+ register char *string;
+ register unsigned char c;
+
+ string = bash_input.location.string;
+
+ /* If the string doesn't exist, or is empty, EOF found. */
+ if (string && *string)
+ {
+ c = *string++;
+ bash_input.location.string = string;
+ return (c);
+ }
+ else
+ return (EOF);
+}
+
+static int
+yy_string_unget (c)
+ int c;
+{
+ *(--bash_input.location.string) = c;
+ return (c);
+}
+
+void
+with_input_from_string (string, name)
+ char *string;
+ const char *name;
+{
+ INPUT_STREAM location;
+
+ location.string = string;
+ init_yy_io (yy_string_get, yy_string_unget, st_string, name, location);
+}
+
+/* Count the number of characters we've consumed from bash_input.location.string
+ and read into shell_input_line, but have not returned from shell_getc.
+ That is the true input location. Rewind bash_input.location.string by
+ that number of characters, so it points to the last character actually
+ consumed by the parser. */
+static void
+rewind_input_string ()
+{
+ int xchars;
+
+ /* number of unconsumed characters in the input -- XXX need to take newlines
+ into account, e.g., $(...\n) */
+ xchars = shell_input_line_len - shell_input_line_index;
+ if (bash_input.location.string[-1] == '\n')
+ xchars++;
+
+ /* XXX - how to reflect bash_input.location.string back to string passed to
+ parse_and_execute or xparse_dolparen? xparse_dolparen needs to know how
+ far into the string we parsed. parse_and_execute knows where bash_input.
+ location.string is, and how far from orig_string that is -- that's the
+ number of characters the command consumed. */
+
+ /* bash_input.location.string - xchars should be where we parsed to */
+ /* need to do more validation on xchars value for sanity -- test cases. */
+ bash_input.location.string -= xchars;
+}
+
+/* **************************************************************** */
+/* */
+/* Let input come from STREAM. */
+/* */
+/* **************************************************************** */
+
+/* These two functions used to test the value of the HAVE_RESTARTABLE_SYSCALLS
+ define, and just use getc/ungetc if it was defined, but since bash
+ installs its signal handlers without the SA_RESTART flag, some signals
+ (like SIGCHLD, SIGWINCH, etc.) received during a read(2) will not cause
+ the read to be restarted. We need to restart it ourselves. */
+
+static int
+yy_stream_get ()
+{
+ int result;
+
+ result = EOF;
+ if (bash_input.location.file)
+ {
+#if 0
+ if (interactive)
+ interrupt_immediately++;
+#endif
+
+ /* XXX - don't need terminate_immediately; getc_with_restart checks
+ for terminating signals itself if read returns < 0 */
+ result = getc_with_restart (bash_input.location.file);
+
+#if 0
+ if (interactive)
+ interrupt_immediately--;
+#endif
+ }
+ return (result);
+}
+
+static int
+yy_stream_unget (c)
+ int c;
+{
+ return (ungetc_with_restart (c, bash_input.location.file));
+}
+
+void
+with_input_from_stream (stream, name)
+ FILE *stream;
+ const char *name;
+{
+ INPUT_STREAM location;
+
+ location.file = stream;
+ init_yy_io (yy_stream_get, yy_stream_unget, st_stream, name, location);
+}
+
+typedef struct stream_saver {
+ struct stream_saver *next;
+ BASH_INPUT bash_input;
+ int line;
+#if defined (BUFFERED_INPUT)
+ BUFFERED_STREAM *bstream;
+#endif /* BUFFERED_INPUT */
+} STREAM_SAVER;
+
+/* The globally known line number. */
+int line_number = 0;
+
+/* The line number offset set by assigning to LINENO. Not currently used. */
+int line_number_base = 0;
+
+#if defined (COND_COMMAND)
+static int cond_lineno;
+static int cond_token;
+#endif
+
+STREAM_SAVER *stream_list = (STREAM_SAVER *)NULL;
+
+void
+push_stream (reset_lineno)
+ int reset_lineno;
+{
+ STREAM_SAVER *saver = (STREAM_SAVER *)xmalloc (sizeof (STREAM_SAVER));
+
+ xbcopy ((char *)&bash_input, (char *)&(saver->bash_input), sizeof (BASH_INPUT));
+
+#if defined (BUFFERED_INPUT)
+ saver->bstream = (BUFFERED_STREAM *)NULL;
+ /* If we have a buffered stream, clear out buffers[fd]. */
+ if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0)
+ saver->bstream = set_buffered_stream (bash_input.location.buffered_fd,
+ (BUFFERED_STREAM *)NULL);
+#endif /* BUFFERED_INPUT */
+
+ saver->line = line_number;
+ bash_input.name = (char *)NULL;
+ saver->next = stream_list;
+ stream_list = saver;
+ EOF_Reached = 0;
+ if (reset_lineno)
+ line_number = 0;
+}
+
+void
+pop_stream ()
+{
+ if (!stream_list)
+ EOF_Reached = 1;
+ else
+ {
+ STREAM_SAVER *saver = stream_list;
+
+ EOF_Reached = 0;
+ stream_list = stream_list->next;
+
+ init_yy_io (saver->bash_input.getter,
+ saver->bash_input.ungetter,
+ saver->bash_input.type,
+ saver->bash_input.name,
+ saver->bash_input.location);
+
+#if defined (BUFFERED_INPUT)
+ /* If we have a buffered stream, restore buffers[fd]. */
+ /* If the input file descriptor was changed while this was on the
+ save stack, update the buffered fd to the new file descriptor and
+ re-establish the buffer <-> bash_input fd correspondence. */
+ if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0)
+ {
+ if (bash_input_fd_changed)
+ {
+ bash_input_fd_changed = 0;
+ if (default_buffered_input >= 0)
+ {
+ bash_input.location.buffered_fd = default_buffered_input;
+ saver->bstream->b_fd = default_buffered_input;
+ SET_CLOSE_ON_EXEC (default_buffered_input);
+ }
+ }
+ /* XXX could free buffered stream returned as result here. */
+ set_buffered_stream (bash_input.location.buffered_fd, saver->bstream);
+ }
+#endif /* BUFFERED_INPUT */
+
+ line_number = saver->line;
+
+ FREE (saver->bash_input.name);
+ free (saver);
+ }
+}
+
+/* Return 1 if a stream of type TYPE is saved on the stack. */
+int
+stream_on_stack (type)
+ enum stream_type type;
+{
+ register STREAM_SAVER *s;
+
+ for (s = stream_list; s; s = s->next)
+ if (s->bash_input.type == type)
+ return 1;
+ return 0;
+}
+
+/* Save the current token state and return it in a malloced array. */
+int *
+save_token_state ()
+{
+ int *ret;
+
+ ret = (int *)xmalloc (4 * sizeof (int));
+ ret[0] = last_read_token;
+ ret[1] = token_before_that;
+ ret[2] = two_tokens_ago;
+ ret[3] = current_token;
+ return ret;
+}
+
+void
+restore_token_state (ts)
+ int *ts;
+{
+ if (ts == 0)
+ return;
+ last_read_token = ts[0];
+ token_before_that = ts[1];
+ two_tokens_ago = ts[2];
+ current_token = ts[3];
+}
+
+/*
+ * This is used to inhibit alias expansion and reserved word recognition
+ * inside case statement pattern lists. A `case statement pattern list' is:
+ *
+ * everything between the `in' in a `case word in' and the next ')'
+ * or `esac'
+ * everything between a `;;' and the next `)' or `esac'
+ */
+
+#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
+
+#define END_OF_ALIAS 0
+
+/*
+ * Pseudo-global variables used in implementing token-wise alias expansion.
+ */
+
+/*
+ * Pushing and popping strings. This works together with shell_getc to
+ * implement alias expansion on a per-token basis.
+ */
+
+#define PSH_ALIAS 0x01
+#define PSH_DPAREN 0x02
+#define PSH_SOURCE 0x04
+
+typedef struct string_saver {
+ struct string_saver *next;
+ int expand_alias; /* Value to set expand_alias to when string is popped. */
+ char *saved_line;
+#if defined (ALIAS)
+ alias_t *expander; /* alias that caused this line to be pushed. */
+#endif
+ size_t saved_line_size, saved_line_index;
+ int saved_line_terminator;
+ int flags;
+} STRING_SAVER;
+
+STRING_SAVER *pushed_string_list = (STRING_SAVER *)NULL;
+
+/*
+ * Push the current shell_input_line onto a stack of such lines and make S
+ * the current input. Used when expanding aliases. EXPAND is used to set
+ * the value of expand_next_token when the string is popped, so that the
+ * word after the alias in the original line is handled correctly when the
+ * alias expands to multiple words. TOKEN is the token that was expanded
+ * into S; it is saved and used to prevent infinite recursive expansion.
+ */
+static void
+push_string (s, expand, ap)
+ char *s;
+ int expand;
+ alias_t *ap;
+{
+ STRING_SAVER *temp = (STRING_SAVER *)xmalloc (sizeof (STRING_SAVER));
+
+ temp->expand_alias = expand;
+ temp->saved_line = shell_input_line;
+ temp->saved_line_size = shell_input_line_size;
+ temp->saved_line_index = shell_input_line_index;
+ temp->saved_line_terminator = shell_input_line_terminator;
+ temp->flags = 0;
+#if defined (ALIAS)
+ temp->expander = ap;
+ if (ap)
+ temp->flags = PSH_ALIAS;
+#endif
+ temp->next = pushed_string_list;
+ pushed_string_list = temp;
+
+#if defined (ALIAS)
+ if (ap)
+ ap->flags |= AL_BEINGEXPANDED;
+#endif
+
+ shell_input_line = s;
+ shell_input_line_size = STRLEN (s);
+ shell_input_line_index = 0;
+ shell_input_line_terminator = '\0';
+#if 0
+ parser_state &= ~PST_ALEXPNEXT; /* XXX */
+#endif
+
+ set_line_mbstate ();
+}
+
+/*
+ * Make the top of the pushed_string stack be the current shell input.
+ * Only called when there is something on the stack. Called from shell_getc
+ * when it thinks it has consumed the string generated by an alias expansion
+ * and needs to return to the original input line.
+ */
+static void
+pop_string ()
+{
+ STRING_SAVER *t;
+
+ FREE (shell_input_line);
+ shell_input_line = pushed_string_list->saved_line;
+ shell_input_line_index = pushed_string_list->saved_line_index;
+ shell_input_line_size = pushed_string_list->saved_line_size;
+ shell_input_line_terminator = pushed_string_list->saved_line_terminator;
+
+ if (pushed_string_list->expand_alias)
+ parser_state |= PST_ALEXPNEXT;
+ else
+ parser_state &= ~PST_ALEXPNEXT;
+
+ t = pushed_string_list;
+ pushed_string_list = pushed_string_list->next;
+
+#if defined (ALIAS)
+ if (t->expander)
+ t->expander->flags &= ~AL_BEINGEXPANDED;
+#endif
+
+ free ((char *)t);
+
+ set_line_mbstate ();
+}
+
+static void
+free_string_list ()
+{
+ register STRING_SAVER *t, *t1;
+
+ for (t = pushed_string_list; t; )
+ {
+ t1 = t->next;
+ FREE (t->saved_line);
+#if defined (ALIAS)
+ if (t->expander)
+ t->expander->flags &= ~AL_BEINGEXPANDED;
+#endif
+ free ((char *)t);
+ t = t1;
+ }
+ pushed_string_list = (STRING_SAVER *)NULL;
+}
+
+#endif /* ALIAS || DPAREN_ARITHMETIC */
+
+void
+free_pushed_string_input ()
+{
+#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
+ free_string_list ();
+#endif
+}
+
+int
+parser_expanding_alias ()
+{
+ return (expanding_alias ());
+}
+
+void
+parser_save_alias ()
+{
+#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
+ push_string ((char *)NULL, 0, (alias_t *)NULL);
+ pushed_string_list->flags = PSH_SOURCE; /* XXX - for now */
+#else
+ ;
+#endif
+}
+
+void
+parser_restore_alias ()
+{
+#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
+ if (pushed_string_list)
+ pop_string ();
+#else
+ ;
+#endif
+}
+
+/* Return a line of text, taken from wherever yylex () reads input.
+ If there is no more input, then we return NULL. If REMOVE_QUOTED_NEWLINE
+ is non-zero, we remove unquoted \<newline> pairs. This is used by
+ read_secondary_line to read here documents. */
+static char *
+read_a_line (remove_quoted_newline)
+ int remove_quoted_newline;
+{
+ static char *line_buffer = (char *)NULL;
+ static int buffer_size = 0;
+ int indx, c, peekc, pass_next;
+
+#if defined (READLINE)
+ if (no_line_editing && SHOULD_PROMPT ())
+#else
+ if (SHOULD_PROMPT ())
+#endif
+ print_prompt ();
+
+ pass_next = indx = 0;
+ while (1)
+ {
+ /* Allow immediate exit if interrupted during input. */
+ QUIT;
+
+ c = yy_getc ();
+
+ /* Ignore null bytes in input. */
+ if (c == 0)
+ {
+#if 0
+ internal_warning ("read_a_line: ignored null byte in input");
+#endif
+ continue;
+ }
+
+ /* If there is no more input, then we return NULL. */
+ if (c == EOF)
+ {
+ if (interactive && bash_input.type == st_stream)
+ clearerr (stdin);
+ if (indx == 0)
+ return ((char *)NULL);
+ c = '\n';
+ }
+
+ /* `+2' in case the final character in the buffer is a newline. */
+ RESIZE_MALLOCED_BUFFER (line_buffer, indx, 2, buffer_size, 128);
+
+ /* IF REMOVE_QUOTED_NEWLINES is non-zero, we are reading a
+ here document with an unquoted delimiter. In this case,
+ the line will be expanded as if it were in double quotes.
+ We allow a backslash to escape the next character, but we
+ need to treat the backslash specially only if a backslash
+ quoting a backslash-newline pair appears in the line. */
+ if (pass_next)
+ {
+ line_buffer[indx++] = c;
+ pass_next = 0;
+ }
+ else if (c == '\\' && remove_quoted_newline)
+ {
+ QUIT;
+ peekc = yy_getc ();
+ if (peekc == '\n')
+ {
+ line_number++;
+ continue; /* Make the unquoted \<newline> pair disappear. */
+ }
+ else
+ {
+ yy_ungetc (peekc);
+ pass_next = 1;
+ line_buffer[indx++] = c; /* Preserve the backslash. */
+ }
+ }
+ else
+ line_buffer[indx++] = c;
+
+ if (c == '\n')
+ {
+ line_buffer[indx] = '\0';
+ return (line_buffer);
+ }
+ }
+}
+
+/* Return a line as in read_a_line (), but insure that the prompt is
+ the secondary prompt. This is used to read the lines of a here
+ document. REMOVE_QUOTED_NEWLINE is non-zero if we should remove
+ newlines quoted with backslashes while reading the line. It is
+ non-zero unless the delimiter of the here document was quoted. */
+char *
+read_secondary_line (remove_quoted_newline)
+ int remove_quoted_newline;
+{
+ char *ret;
+ int n, c;
+
+ prompt_string_pointer = &ps2_prompt;
+ if (SHOULD_PROMPT())
+ prompt_again ();
+ ret = read_a_line (remove_quoted_newline);
+#if defined (HISTORY)
+ if (ret && remember_on_history && (parser_state & PST_HEREDOC))
+ {
+ /* To make adding the the here-document body right, we need to rely
+ on history_delimiting_chars() returning \n for the first line of
+ the here-document body and the null string for the second and
+ subsequent lines, so we avoid double newlines.
+ current_command_line_count == 2 for the first line of the body. */
+
+ current_command_line_count++;
+ maybe_add_history (ret);
+ }
+#endif /* HISTORY */
+ return ret;
+}
+
+/* **************************************************************** */
+/* */
+/* YYLEX () */
+/* */
+/* **************************************************************** */
+
+/* Reserved words. These are only recognized as the first word of a
+ command. */
+STRING_INT_ALIST word_token_alist[] = {
+ { "if", IF },
+ { "then", THEN },
+ { "else", ELSE },
+ { "elif", ELIF },
+ { "fi", FI },
+ { "case", CASE },
+ { "esac", ESAC },
+ { "for", FOR },
+#if defined (SELECT_COMMAND)
+ { "select", SELECT },
+#endif
+ { "while", WHILE },
+ { "until", UNTIL },
+ { "do", DO },
+ { "done", DONE },
+ { "in", IN },
+ { "function", FUNCTION },
+#if defined (COMMAND_TIMING)
+ { "time", TIME },
+#endif
+ { "{", '{' },
+ { "}", '}' },
+ { "!", BANG },
+#if defined (COND_COMMAND)
+ { "[[", COND_START },
+ { "]]", COND_END },
+#endif
+#if defined (COPROCESS_SUPPORT)
+ { "coproc", COPROC },
+#endif
+ { (char *)NULL, 0}
+};
+
+/* other tokens that can be returned by read_token() */
+STRING_INT_ALIST other_token_alist[] = {
+ /* Multiple-character tokens with special values */
+ { "--", TIMEIGN },
+ { "-p", TIMEOPT },
+ { "&&", AND_AND },
+ { "||", OR_OR },
+ { ">>", GREATER_GREATER },
+ { "<<", LESS_LESS },
+ { "<&", LESS_AND },
+ { ">&", GREATER_AND },
+ { ";;", SEMI_SEMI },
+ { ";&", SEMI_AND },
+ { ";;&", SEMI_SEMI_AND },
+ { "<<-", LESS_LESS_MINUS },
+ { "<<<", LESS_LESS_LESS },
+ { "&>", AND_GREATER },
+ { "&>>", AND_GREATER_GREATER },
+ { "<>", LESS_GREATER },
+ { ">|", GREATER_BAR },
+ { "|&", BAR_AND },
+ { "EOF", yacc_EOF },
+ /* Tokens whose value is the character itself */
+ { ">", '>' },
+ { "<", '<' },
+ { "-", '-' },
+ { "{", '{' },
+ { "}", '}' },
+ { ";", ';' },
+ { "(", '(' },
+ { ")", ')' },
+ { "|", '|' },
+ { "&", '&' },
+ { "newline", '\n' },
+ { (char *)NULL, 0}
+};
+
+/* others not listed here:
+ WORD look at yylval.word
+ ASSIGNMENT_WORD look at yylval.word
+ NUMBER look at yylval.number
+ ARITH_CMD look at yylval.word_list
+ ARITH_FOR_EXPRS look at yylval.word_list
+ COND_CMD look at yylval.command
+*/
+
+/* These are used by read_token_word, but appear up here so that shell_getc
+ can use them to decide when to add otherwise blank lines to the history. */
+
+/* The primary delimiter stack. */
+struct dstack dstack = { (char *)NULL, 0, 0 };
+
+/* A temporary delimiter stack to be used when decoding prompt strings.
+ This is needed because command substitutions in prompt strings (e.g., PS2)
+ can screw up the parser's quoting state. */
+static struct dstack temp_dstack = { (char *)NULL, 0, 0 };
+
+/* Macro for accessing the top delimiter on the stack. Returns the
+ delimiter or zero if none. */
+#define current_delimiter(ds) \
+ (ds.delimiter_depth ? ds.delimiters[ds.delimiter_depth - 1] : 0)
+
+#define push_delimiter(ds, character) \
+ do \
+ { \
+ if (ds.delimiter_depth + 2 > ds.delimiter_space) \
+ ds.delimiters = (char *)xrealloc \
+ (ds.delimiters, (ds.delimiter_space += 10) * sizeof (char)); \
+ ds.delimiters[ds.delimiter_depth] = character; \
+ ds.delimiter_depth++; \
+ } \
+ while (0)
+
+#define pop_delimiter(ds) ds.delimiter_depth--
+
+/* Return the next shell input character. This always reads characters
+ from shell_input_line; when that line is exhausted, it is time to
+ read the next line. This is called by read_token when the shell is
+ processing normal command input. */
+
+/* This implements one-character lookahead/lookbehind across physical input
+ lines, to avoid something being lost because it's pushed back with
+ shell_ungetc when we're at the start of a line. */
+static int eol_ungetc_lookahead = 0;
+
+static int
+shell_getc (remove_quoted_newline)
+ int remove_quoted_newline;
+{
+ register int i;
+ int c, truncating;
+ unsigned char uc;
+
+ QUIT;
+
+ if (sigwinch_received)
+ {
+ sigwinch_received = 0;
+ get_new_window_size (0, (int *)0, (int *)0);
+ }
+
+ if (eol_ungetc_lookahead)
+ {
+ c = eol_ungetc_lookahead;
+ eol_ungetc_lookahead = 0;
+ return (c);
+ }
+
+#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
+ /* If shell_input_line[shell_input_line_index] == 0, but there is
+ something on the pushed list of strings, then we don't want to go
+ off and get another line. We let the code down below handle it. */
+
+ if (!shell_input_line || ((!shell_input_line[shell_input_line_index]) &&
+ (pushed_string_list == (STRING_SAVER *)NULL)))
+#else /* !ALIAS && !DPAREN_ARITHMETIC */
+ if (!shell_input_line || !shell_input_line[shell_input_line_index])
+#endif /* !ALIAS && !DPAREN_ARITHMETIC */
+ {
+ line_number++;
+
+ /* Let's not let one really really long line blow up memory allocation */
+ if (shell_input_line && shell_input_line_size >= 32768)
+ {
+ free (shell_input_line);
+ shell_input_line = 0;
+ shell_input_line_size = 0;
+ }
+
+ restart_read:
+
+ /* Allow immediate exit if interrupted during input. */
+ QUIT;
+
+ i = truncating = 0;
+ shell_input_line_terminator = 0;
+
+ /* If the shell is interatctive, but not currently printing a prompt
+ (interactive_shell && interactive == 0), we don't want to print
+ notifies or cleanup the jobs -- we want to defer it until we do
+ print the next prompt. */
+ if (interactive_shell == 0 || SHOULD_PROMPT())
+ {
+#if defined (JOB_CONTROL)
+ /* This can cause a problem when reading a command as the result
+ of a trap, when the trap is called from flush_child. This call
+ had better not cause jobs to disappear from the job table in
+ that case, or we will have big trouble. */
+ notify_and_cleanup ();
+#else /* !JOB_CONTROL */
+ cleanup_dead_jobs ();
+#endif /* !JOB_CONTROL */
+ }
+
+#if defined (READLINE)
+ if (no_line_editing && SHOULD_PROMPT())
+#else
+ if (SHOULD_PROMPT())
+#endif
+ print_prompt ();
+
+ if (bash_input.type == st_stream)
+ clearerr (stdin);
+
+ while (1)
+ {
+ c = yy_getc ();
+
+ /* Allow immediate exit if interrupted during input. */
+ QUIT;
+
+ if (c == '\0')
+ {
+#if 0
+ internal_warning ("shell_getc: ignored null byte in input");
+#endif
+ continue;
+ }
+
+ /* Theoretical overflow */
+ /* If we can't put 256 bytes more into the buffer, allocate
+ everything we can and fill it as full as we can. */
+ /* XXX - we ignore rest of line using `truncating' flag */
+ if (shell_input_line_size > (SIZE_MAX - 256))
+ {
+ size_t n;
+
+ n = SIZE_MAX - i; /* how much more can we put into the buffer? */
+ if (n <= 2) /* we have to save 1 for the newline added below */
+ {
+ if (truncating == 0)
+ internal_warning("shell_getc: shell_input_line_size (%zu) exceeds SIZE_MAX (%llu): line truncated", shell_input_line_size, SIZE_MAX);
+ shell_input_line[i] = '\0';
+ truncating = 1;
+ }
+ if (shell_input_line_size < SIZE_MAX)
+ {
+ shell_input_line_size = SIZE_MAX;
+ shell_input_line = xrealloc (shell_input_line, shell_input_line_size);
+ }
+ }
+ else
+ RESIZE_MALLOCED_BUFFER (shell_input_line, i, 2, shell_input_line_size, 256);
+
+ if (c == EOF)
+ {
+ if (bash_input.type == st_stream)
+ clearerr (stdin);
+
+ if (i == 0)
+ shell_input_line_terminator = EOF;
+
+ shell_input_line[i] = '\0';
+ break;
+ }
+
+ if (truncating == 0 || c == '\n')
+ shell_input_line[i++] = c;
+
+ if (c == '\n')
+ {
+ shell_input_line[--i] = '\0';
+ current_command_line_count++;
+ break;
+ }
+ }
+
+ shell_input_line_index = 0;
+ shell_input_line_len = i; /* == strlen (shell_input_line) */
+
+ set_line_mbstate ();
+
+#if defined (HISTORY)
+ if (remember_on_history && shell_input_line && shell_input_line[0])
+ {
+ char *expansions;
+# if defined (BANG_HISTORY)
+ int old_hist;
+
+ /* If the current delimiter is a single quote, we should not be
+ performing history expansion, even if we're on a different
+ line from the original single quote. */
+ old_hist = history_expansion_inhibited;
+ if (current_delimiter (dstack) == '\'')
+ history_expansion_inhibited = 1;
+# endif
+ expansions = pre_process_line (shell_input_line, 1, 1);
+# if defined (BANG_HISTORY)
+ history_expansion_inhibited = old_hist;
+# endif
+ if (expansions != shell_input_line)
+ {
+ free (shell_input_line);
+ shell_input_line = expansions;
+ shell_input_line_len = shell_input_line ?
+ strlen (shell_input_line) : 0;
+ if (shell_input_line_len == 0)
+ current_command_line_count--;
+
+ /* We have to force the xrealloc below because we don't know
+ the true allocated size of shell_input_line anymore. */
+ shell_input_line_size = shell_input_line_len;
+
+ set_line_mbstate ();
+ }
+ }
+ /* Try to do something intelligent with blank lines encountered while
+ entering multi-line commands. XXX - this is grotesque */
+ else if (remember_on_history && shell_input_line &&
+ shell_input_line[0] == '\0' &&
+ current_command_line_count > 1)
+ {
+ if (current_delimiter (dstack))
+ /* We know shell_input_line[0] == 0 and we're reading some sort of
+ quoted string. This means we've got a line consisting of only
+ a newline in a quoted string. We want to make sure this line
+ gets added to the history. */
+ maybe_add_history (shell_input_line);
+ else
+ {
+ char *hdcs;
+ hdcs = history_delimiting_chars (shell_input_line);
+ if (hdcs && hdcs[0] == ';')
+ maybe_add_history (shell_input_line);
+ }
+ }
+
+#endif /* HISTORY */
+
+ if (shell_input_line)
+ {
+ /* Lines that signify the end of the shell's input should not be
+ echoed. We should not echo lines while parsing command
+ substitutions with recursive calls into the parsing engine; those
+ should only be echoed once when we read the word. That is the
+ reason for the test against shell_eof_token, which is set to a
+ right paren when parsing the contents of command substitutions. */
+ if (echo_input_at_read && (shell_input_line[0] ||
+ shell_input_line_terminator != EOF) &&
+ shell_eof_token == 0)
+ fprintf (stderr, "%s\n", shell_input_line);
+ }
+ else
+ {
+ shell_input_line_size = 0;
+ prompt_string_pointer = ¤t_prompt_string;
+ if (SHOULD_PROMPT ())
+ prompt_again ();
+ goto restart_read;
+ }
+
+ /* Add the newline to the end of this string, iff the string does
+ not already end in an EOF character. */
+ if (shell_input_line_terminator != EOF)
+ {
+ if (shell_input_line_size < SIZE_MAX && shell_input_line_len > shell_input_line_size - 3)
+ shell_input_line = (char *)xrealloc (shell_input_line,
+ 1 + (shell_input_line_size += 2));
+
+ shell_input_line[shell_input_line_len] = '\n';
+ shell_input_line[shell_input_line_len + 1] = '\0';
+
+ set_line_mbstate ();
+ }
+ }
+
+next_alias_char:
+ uc = shell_input_line[shell_input_line_index];
+
+ if (uc)
+ shell_input_line_index++;
+
+#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
+ /* If UC is NULL, we have reached the end of the current input string. If
+ pushed_string_list is non-empty, it's time to pop to the previous string
+ because we have fully consumed the result of the last alias expansion.
+ Do it transparently; just return the next character of the string popped
+ to. */
+ /* If pushed_string_list != 0 but pushed_string_list->expander == 0 (not
+ currently tested) and the flags value is not PSH_SOURCE, we are not
+ parsing an alias, we have just saved one (push_string, when called by
+ the parse_dparen code) In this case, just go on as well. The PSH_SOURCE
+ case is handled below. */
+pop_alias:
+ if (uc == 0 && pushed_string_list && pushed_string_list->flags != PSH_SOURCE)
+ {
+ pop_string ();
+ uc = shell_input_line[shell_input_line_index];
+ if (uc)
+ shell_input_line_index++;
+ }
+#endif /* ALIAS || DPAREN_ARITHMETIC */
+
+ if MBTEST(uc == '\\' && remove_quoted_newline && shell_input_line[shell_input_line_index] == '\n')
+ {
+ if (SHOULD_PROMPT ())
+ prompt_again ();
+ line_number++;
+ /* What do we do here if we're expanding an alias whose definition
+ includes an escaped newline? If that's the last character in the
+ alias expansion, we just pop the pushed string list (recall that
+ we inhibit the appending of a space in mk_alexpansion() if newline
+ is the last character). If it's not the last character, we need
+ to consume the quoted newline and move to the next character in
+ the expansion. */
+#if defined (ALIAS)
+ if (expanding_alias () && shell_input_line[shell_input_line_index+1] == '\0')
+ {
+ uc = 0;
+ goto pop_alias;
+ }
+ else if (expanding_alias () && shell_input_line[shell_input_line_index+1] != '\0')
+ {
+ shell_input_line_index++; /* skip newline */
+ goto next_alias_char; /* and get next character */
+ }
+ else
+#endif
+ goto restart_read;
+ }
+
+ if (uc == 0 && shell_input_line_terminator == EOF)
+ return ((shell_input_line_index != 0) ? '\n' : EOF);
+
+#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
+ /* We already know that we are not parsing an alias expansion because of the
+ check for expanding_alias() above. This knows how parse_and_execute
+ handles switching to st_string input while an alias is being expanded,
+ hence the check for pushed_string_list without pushed_string_list->expander
+ and the check for PSH_SOURCE as pushed_string_list->flags.
+ parse_and_execute and parse_string both change the input type to st_string
+ and place the string to be parsed and executed into location.string, so
+ we should not stop reading that until the pointer is '\0'.
+ The check for shell_input_line_terminator may be superfluous.
+
+ This solves the problem of `.' inside a multi-line alias with embedded
+ newlines executing things out of order. */
+ if (uc == 0 && bash_input.type == st_string && *bash_input.location.string &&
+ pushed_string_list && pushed_string_list->flags == PSH_SOURCE &&
+ shell_input_line_terminator == 0)
+ {
+ shell_input_line_index = 0;
+ goto restart_read;
+ }
+#endif
+
+ return (uc);
+}
+
+/* Put C back into the input for the shell. This might need changes for
+ HANDLE_MULTIBYTE around EOLs. Since we (currently) never push back a
+ character different than we read, shell_input_line_property doesn't need
+ to change when manipulating shell_input_line. The define for
+ last_shell_getc_is_singlebyte should take care of it, though. */
+static void
+shell_ungetc (c)
+ int c;
+{
+ if (shell_input_line && shell_input_line_index)
+ shell_input_line[--shell_input_line_index] = c;
+ else
+ eol_ungetc_lookahead = c;
+}
+
+#ifdef INCLUDE_UNUSED
+/* Back the input pointer up by one, effectively `ungetting' a character. */
+static void
+shell_ungetchar ()
+{
+ if (shell_input_line && shell_input_line_index)
+ shell_input_line_index--;
+}
+#endif
+
+/* Discard input until CHARACTER is seen, then push that character back
+ onto the input stream. */
+static void
+discard_until (character)
+ int character;
+{
+ int c;
+
+ while ((c = shell_getc (0)) != EOF && c != character)
+ ;
+
+ if (c != EOF)
+ shell_ungetc (c);
+}
+
+void
+execute_variable_command (command, vname)
+ char *command, *vname;
+{
+ char *last_lastarg;
+ sh_parser_state_t ps;
+
+ save_parser_state (&ps);
+ last_lastarg = get_string_value ("_");
+ if (last_lastarg)
+ last_lastarg = savestring (last_lastarg);
+
+ parse_and_execute (savestring (command), vname, SEVAL_NONINT|SEVAL_NOHIST);
+
+ restore_parser_state (&ps);
+ bind_variable ("_", last_lastarg, 0);
+ FREE (last_lastarg);
+
+ if (token_to_read == '\n') /* reset_parser was called */
+ token_to_read = 0;
+}
+
+/* Place to remember the token. We try to keep the buffer
+ at a reasonable size, but it can grow. */
+static char *token = (char *)NULL;
+
+/* Current size of the token buffer. */
+static int token_buffer_size;
+
+/* Command to read_token () explaining what we want it to do. */
+#define READ 0
+#define RESET 1
+#define prompt_is_ps1 \
+ (!prompt_string_pointer || prompt_string_pointer == &ps1_prompt)
+
+/* Function for yyparse to call. yylex keeps track of
+ the last two tokens read, and calls read_token. */
+static int
+yylex ()
+{
+ if (interactive && (current_token == 0 || current_token == '\n'))
+ {
+ /* Before we print a prompt, we might have to check mailboxes.
+ We do this only if it is time to do so. Notice that only here
+ is the mail alarm reset; nothing takes place in check_mail ()
+ except the checking of mail. Please don't change this. */
+ if (prompt_is_ps1 && parse_and_execute_level == 0 && time_to_check_mail ())
+ {
+ check_mail ();
+ reset_mail_timer ();
+ }
+
+ /* Avoid printing a prompt if we're not going to read anything, e.g.
+ after resetting the parser with read_token (RESET). */
+ if (token_to_read == 0 && SHOULD_PROMPT ())
+ prompt_again ();
+ }
+
+ two_tokens_ago = token_before_that;
+ token_before_that = last_read_token;
+ last_read_token = current_token;
+ current_token = read_token (READ);
+
+ if ((parser_state & PST_EOFTOKEN) && current_token == shell_eof_token)
+ {
+ current_token = yacc_EOF;
+ if (bash_input.type == st_string)
+ rewind_input_string ();
+ }
+ parser_state &= ~PST_EOFTOKEN;
+
+ return (current_token);
+}
+
+/* When non-zero, we have read the required tokens
+ which allow ESAC to be the next one read. */
+static int esacs_needed_count;
+
+void
+gather_here_documents ()
+{
+ int r;
+
+ r = 0;
+ while (need_here_doc)
+ {
+ parser_state |= PST_HEREDOC;
+ make_here_document (redir_stack[r++], line_number);
+ parser_state &= ~PST_HEREDOC;
+ need_here_doc--;
+ }
+}
+
+/* When non-zero, an open-brace used to create a group is awaiting a close
+ brace partner. */
+static int open_brace_count;
+
+#define command_token_position(token) \
+ (((token) == ASSIGNMENT_WORD) || (parser_state&PST_REDIRLIST) || \
+ ((token) != SEMI_SEMI && (token) != SEMI_AND && (token) != SEMI_SEMI_AND && reserved_word_acceptable(token)))
+
+#define assignment_acceptable(token) \
+ (command_token_position(token) && ((parser_state & PST_CASEPAT) == 0))
+
+/* Check to see if TOKEN is a reserved word and return the token
+ value if it is. */
+#define CHECK_FOR_RESERVED_WORD(tok) \
+ do { \
+ if (!dollar_present && !quoted && \
+ reserved_word_acceptable (last_read_token)) \
+ { \
+ int i; \
+ for (i = 0; word_token_alist[i].word != (char *)NULL; i++) \
+ if (STREQ (tok, word_token_alist[i].word)) \
+ { \
+ if ((parser_state & PST_CASEPAT) && (word_token_alist[i].token != ESAC)) \
+ break; \
+ if (word_token_alist[i].token == TIME && time_command_acceptable () == 0) \
+ break; \
+ if (word_token_alist[i].token == ESAC) \
+ parser_state &= ~(PST_CASEPAT|PST_CASESTMT); \
+ else if (word_token_alist[i].token == CASE) \
+ parser_state |= PST_CASESTMT; \
+ else if (word_token_alist[i].token == COND_END) \
+ parser_state &= ~(PST_CONDCMD|PST_CONDEXPR); \
+ else if (word_token_alist[i].token == COND_START) \
+ parser_state |= PST_CONDCMD; \
+ else if (word_token_alist[i].token == '{') \
+ open_brace_count++; \
+ else if (word_token_alist[i].token == '}' && open_brace_count) \
+ open_brace_count--; \
+ return (word_token_alist[i].token); \
+ } \
+ } \
+ } while (0)
+
+#if defined (ALIAS)
+
+ /* OK, we have a token. Let's try to alias expand it, if (and only if)
+ it's eligible.
+
+ It is eligible for expansion if EXPAND_ALIASES is set, and
+ the token is unquoted and the last token read was a command
+ separator (or expand_next_token is set), and we are currently
+ processing an alias (pushed_string_list is non-empty) and this
+ token is not the same as the current or any previously
+ processed alias.
+
+ Special cases that disqualify:
+ In a pattern list in a case statement (parser_state & PST_CASEPAT). */
+
+static char *
+mk_alexpansion (s)
+ char *s;
+{
+ int l;
+ char *r;
+
+ l = strlen (s);
+ r = xmalloc (l + 2);
+ strcpy (r, s);
+ /* If the last character in the alias is a newline, don't add a trailing
+ space to the expansion. Works with shell_getc above. */
+ if (r[l - 1] != ' ' && r[l - 1] != '\n')
+ r[l++] = ' ';
+ r[l] = '\0';
+ return r;
+}
+
+static int
+alias_expand_token (tokstr)
+ char *tokstr;
+{
+ char *expanded;
+ alias_t *ap;
+
+ if (((parser_state & PST_ALEXPNEXT) || command_token_position (last_read_token)) &&
+ (parser_state & PST_CASEPAT) == 0)
+ {
+ ap = find_alias (tokstr);
+
+ /* Currently expanding this token. */
+ if (ap && (ap->flags & AL_BEINGEXPANDED))
+ return (NO_EXPANSION);
+
+ /* mk_alexpansion puts an extra space on the end of the alias expansion,
+ so the lookahead by the parser works right. If this gets changed,
+ make sure the code in shell_getc that deals with reaching the end of
+ an expanded alias is changed with it. */
+ expanded = ap ? mk_alexpansion (ap->value) : (char *)NULL;
+
+ if (expanded)
+ {
+ push_string (expanded, ap->flags & AL_EXPANDNEXT, ap);
+ return (RE_READ_TOKEN);
+ }
+ else
+ /* This is an eligible token that does not have an expansion. */
+ return (NO_EXPANSION);
+ }
+ return (NO_EXPANSION);
+}
+#endif /* ALIAS */
+
+static int
+time_command_acceptable ()
+{
+#if defined (COMMAND_TIMING)
+ int i;
+
+ if (posixly_correct && shell_compatibility_level > 41)
+ {
+ /* Quick check of the rest of the line to find the next token. If it
+ begins with a `-', Posix says to not return `time' as the token.
+ This was interp 267. */
+ i = shell_input_line_index;
+ while (i < shell_input_line_len && (shell_input_line[i] == ' ' || shell_input_line[i] == '\t'))
+ i++;
+ if (shell_input_line[i] == '-')
+ return 0;
+ }
+
+ switch (last_read_token)
+ {
+ case 0:
+ case ';':
+ case '\n':
+ case AND_AND:
+ case OR_OR:
+ case '&':
+ case DO:
+ case THEN:
+ case ELSE:
+ case '{': /* } */
+ case '(': /* ) */
+ case BANG: /* ! time pipeline */
+ case TIME: /* time time pipeline */
+ case TIMEOPT: /* time -p time pipeline */
+ case TIMEIGN: /* time -p -- ... */
+ return 1;
+ default:
+ return 0;
+ }
+#else
+ return 0;
+#endif /* COMMAND_TIMING */
+}
+
+/* Handle special cases of token recognition:
+ IN is recognized if the last token was WORD and the token
+ before that was FOR or CASE or SELECT.
+
+ DO is recognized if the last token was WORD and the token
+ before that was FOR or SELECT.
+
+ ESAC is recognized if the last token caused `esacs_needed_count'
+ to be set
+
+ `{' is recognized if the last token as WORD and the token
+ before that was FUNCTION, or if we just parsed an arithmetic
+ `for' command.
+
+ `}' is recognized if there is an unclosed `{' present.
+
+ `-p' is returned as TIMEOPT if the last read token was TIME.
+ `--' is returned as TIMEIGN if the last read token was TIMEOPT.
+
+ ']]' is returned as COND_END if the parser is currently parsing
+ a conditional expression ((parser_state & PST_CONDEXPR) != 0)
+
+ `time' is returned as TIME if and only if it is immediately
+ preceded by one of `;', `\n', `||', `&&', or `&'.
+*/
+
+static int
+special_case_tokens (tokstr)
+ char *tokstr;
+{
+ if ((last_read_token == WORD) &&
+#if defined (SELECT_COMMAND)
+ ((token_before_that == FOR) || (token_before_that == CASE) || (token_before_that == SELECT)) &&
+#else
+ ((token_before_that == FOR) || (token_before_that == CASE)) &&
+#endif
+ (tokstr[0] == 'i' && tokstr[1] == 'n' && tokstr[2] == 0))
+ {
+ if (token_before_that == CASE)
+ {
+ parser_state |= PST_CASEPAT;
+ esacs_needed_count++;
+ }
+ return (IN);
+ }
+
+ if (last_read_token == WORD &&
+#if defined (SELECT_COMMAND)
+ (token_before_that == FOR || token_before_that == SELECT) &&
+#else
+ (token_before_that == FOR) &&
+#endif
+ (tokstr[0] == 'd' && tokstr[1] == 'o' && tokstr[2] == '\0'))
+ return (DO);
+
+ /* Ditto for ESAC in the CASE case.
+ Specifically, this handles "case word in esac", which is a legal
+ construct, certainly because someone will pass an empty arg to the
+ case construct, and we don't want it to barf. Of course, we should
+ insist that the case construct has at least one pattern in it, but
+ the designers disagree. */
+ if (esacs_needed_count)
+ {
+ esacs_needed_count--;
+ if (STREQ (tokstr, "esac"))
+ {
+ parser_state &= ~PST_CASEPAT;
+ return (ESAC);
+ }
+ }
+
+ /* The start of a shell function definition. */
+ if (parser_state & PST_ALLOWOPNBRC)
+ {
+ parser_state &= ~PST_ALLOWOPNBRC;
+ if (tokstr[0] == '{' && tokstr[1] == '\0') /* } */
+ {
+ open_brace_count++;
+ function_bstart = line_number;
+ return ('{'); /* } */
+ }
+ }
+
+ /* We allow a `do' after a for ((...)) without an intervening
+ list_terminator */
+ if (last_read_token == ARITH_FOR_EXPRS && tokstr[0] == 'd' && tokstr[1] == 'o' && !tokstr[2])
+ return (DO);
+ if (last_read_token == ARITH_FOR_EXPRS && tokstr[0] == '{' && tokstr[1] == '\0') /* } */
+ {
+ open_brace_count++;
+ return ('{'); /* } */
+ }
+
+ if (open_brace_count && reserved_word_acceptable (last_read_token) && tokstr[0] == '}' && !tokstr[1])
+ {
+ open_brace_count--; /* { */
+ return ('}');
+ }
+
+#if defined (COMMAND_TIMING)
+ /* Handle -p after `time'. */
+ if (last_read_token == TIME && tokstr[0] == '-' && tokstr[1] == 'p' && !tokstr[2])
+ return (TIMEOPT);
+ /* Handle -- after `time -p'. */
+ if (last_read_token == TIMEOPT && tokstr[0] == '-' && tokstr[1] == '-' && !tokstr[2])
+ return (TIMEIGN);
+#endif
+
+#if defined (COND_COMMAND) /* [[ */
+ if ((parser_state & PST_CONDEXPR) && tokstr[0] == ']' && tokstr[1] == ']' && tokstr[2] == '\0')
+ return (COND_END);
+#endif
+
+ return (-1);
+}
+
+/* Called from shell.c when Control-C is typed at top level. Or
+ by the error rule at top level. */
+void
+reset_parser ()
+{
+ dstack.delimiter_depth = 0; /* No delimiters found so far. */
+ open_brace_count = 0;
+
+#if defined (EXTENDED_GLOB)
+ /* Reset to global value of extended glob */
+ if (parser_state & PST_EXTPAT)
+ extended_glob = global_extglob;
+#endif
+
+ parser_state = 0;
+
+#if defined (ALIAS) || defined (DPAREN_ARITHMETIC)
+ if (pushed_string_list)
+ free_string_list ();
+#endif /* ALIAS || DPAREN_ARITHMETIC */
+
+ if (shell_input_line)
+ {
+ free (shell_input_line);
+ shell_input_line = (char *)NULL;
+ shell_input_line_size = shell_input_line_index = 0;
+ }
+
+ FREE (word_desc_to_read);
+ word_desc_to_read = (WORD_DESC *)NULL;
+
+ current_token = '\n'; /* XXX */
+ last_read_token = '\n';
+ token_to_read = '\n';
+}
+
+/* Read the next token. Command can be READ (normal operation) or
+ RESET (to normalize state). */
+static int
+read_token (command)
+ int command;
+{
+ int character; /* Current character. */
+ int peek_char; /* Temporary look-ahead character. */
+ int result; /* The thing to return. */
+
+ if (command == RESET)
+ {
+ reset_parser ();
+ return ('\n');
+ }
+
+ if (token_to_read)
+ {
+ result = token_to_read;
+ if (token_to_read == WORD || token_to_read == ASSIGNMENT_WORD)
+ {
+ yylval.word = word_desc_to_read;
+ word_desc_to_read = (WORD_DESC *)NULL;
+ }
+ token_to_read = 0;
+ return (result);
+ }
+
+#if defined (COND_COMMAND)
+ if ((parser_state & (PST_CONDCMD|PST_CONDEXPR)) == PST_CONDCMD)
+ {
+ cond_lineno = line_number;
+ parser_state |= PST_CONDEXPR;
+ yylval.command = parse_cond_command ();
+ if (cond_token != COND_END)
+ {
+ cond_error ();
+ return (-1);
+ }
+ token_to_read = COND_END;
+ parser_state &= ~(PST_CONDEXPR|PST_CONDCMD);
+ return (COND_CMD);
+ }
+#endif
+
+#if defined (ALIAS)
+ /* This is a place to jump back to once we have successfully expanded a
+ token with an alias and pushed the string with push_string () */
+ re_read_token:
+#endif /* ALIAS */
+
+ /* Read a single word from input. Start by skipping blanks. */
+ while ((character = shell_getc (1)) != EOF && shellblank (character))
+ ;
+
+ if (character == EOF)
+ {
+ EOF_Reached = 1;
+ return (yacc_EOF);
+ }
+
+ if MBTEST(character == '#' && (!interactive || interactive_comments))
+ {
+ /* A comment. Discard until EOL or EOF, and then return a newline. */
+ discard_until ('\n');
+ shell_getc (0);
+ character = '\n'; /* this will take the next if statement and return. */
+ }
+
+ if (character == '\n')
+ {
+ /* If we're about to return an unquoted newline, we can go and collect
+ the text of any pending here document. */
+ if (need_here_doc)
+ gather_here_documents ();
+
+#if defined (ALIAS)
+ parser_state &= ~PST_ALEXPNEXT;
+#endif /* ALIAS */
+
+ parser_state &= ~PST_ASSIGNOK;
+
+ return (character);
+ }
+
+ if (parser_state & PST_REGEXP)
+ goto tokword;
+
+ /* Shell meta-characters. */
+ if MBTEST(shellmeta (character) && ((parser_state & PST_DBLPAREN) == 0))
+ {
+#if defined (ALIAS)
+ /* Turn off alias tokenization iff this character sequence would
+ not leave us ready to read a command. */
+ if (character == '<' || character == '>')
+ parser_state &= ~PST_ALEXPNEXT;
+#endif /* ALIAS */
+
+ parser_state &= ~PST_ASSIGNOK;
+
+ peek_char = shell_getc (1);
+ if (character == peek_char)
+ {
+ switch (character)
+ {
+ case '<':
+ /* If '<' then we could be at "<<" or at "<<-". We have to
+ look ahead one more character. */
+ peek_char = shell_getc (1);
+ if MBTEST(peek_char == '-')
+ return (LESS_LESS_MINUS);
+ else if MBTEST(peek_char == '<')
+ return (LESS_LESS_LESS);
+ else
+ {
+ shell_ungetc (peek_char);
+ return (LESS_LESS);
+ }
+
+ case '>':
+ return (GREATER_GREATER);
+
+ case ';':
+ parser_state |= PST_CASEPAT;
+#if defined (ALIAS)
+ parser_state &= ~PST_ALEXPNEXT;
+#endif /* ALIAS */
+
+ peek_char = shell_getc (1);
+ if MBTEST(peek_char == '&')
+ return (SEMI_SEMI_AND);
+ else
+ {
+ shell_ungetc (peek_char);
+ return (SEMI_SEMI);
+ }
+
+ case '&':
+ return (AND_AND);
+
+ case '|':
+ return (OR_OR);
+
+#if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND)
+ case '(': /* ) */
+ result = parse_dparen (character);
+ if (result == -2)
+ break;
+ else
+ return result;
+#endif
+ }
+ }
+ else if MBTEST(character == '<' && peek_char == '&')
+ return (LESS_AND);
+ else if MBTEST(character == '>' && peek_char == '&')
+ return (GREATER_AND);
+ else if MBTEST(character == '<' && peek_char == '>')
+ return (LESS_GREATER);
+ else if MBTEST(character == '>' && peek_char == '|')
+ return (GREATER_BAR);
+ else if MBTEST(character == '&' && peek_char == '>')
+ {
+ peek_char = shell_getc (1);
+ if MBTEST(peek_char == '>')
+ return (AND_GREATER_GREATER);
+ else
+ {
+ shell_ungetc (peek_char);
+ return (AND_GREATER);
+ }
+ }
+ else if MBTEST(character == '|' && peek_char == '&')
+ return (BAR_AND);
+ else if MBTEST(character == ';' && peek_char == '&')
+ {
+ parser_state |= PST_CASEPAT;
+#if defined (ALIAS)
+ parser_state &= ~PST_ALEXPNEXT;
+#endif /* ALIAS */
+ return (SEMI_AND);
+ }
+
+ shell_ungetc (peek_char);
+
+ /* If we look like we are reading the start of a function
+ definition, then let the reader know about it so that
+ we will do the right thing with `{'. */
+ if MBTEST(character == ')' && last_read_token == '(' && token_before_that == WORD)
+ {
+ parser_state |= PST_ALLOWOPNBRC;
+#if defined (ALIAS)
+ parser_state &= ~PST_ALEXPNEXT;
+#endif /* ALIAS */
+ function_dstart = line_number;
+ }
+
+ /* case pattern lists may be preceded by an optional left paren. If
+ we're not trying to parse a case pattern list, the left paren
+ indicates a subshell. */
+ if MBTEST(character == '(' && (parser_state & PST_CASEPAT) == 0) /* ) */
+ parser_state |= PST_SUBSHELL;
+ /*(*/
+ else if MBTEST((parser_state & PST_CASEPAT) && character == ')')
+ parser_state &= ~PST_CASEPAT;
+ /*(*/
+ else if MBTEST((parser_state & PST_SUBSHELL) && character == ')')
+ parser_state &= ~PST_SUBSHELL;
+
+#if defined (PROCESS_SUBSTITUTION)
+ /* Check for the constructs which introduce process substitution.
+ Shells running in `posix mode' don't do process substitution. */
+ if MBTEST(posixly_correct || ((character != '>' && character != '<') || peek_char != '(')) /*)*/
+#endif /* PROCESS_SUBSTITUTION */
+ return (character);
+ }
+
+ /* Hack <&- (close stdin) case. Also <&N- (dup and close). */
+ if MBTEST(character == '-' && (last_read_token == LESS_AND || last_read_token == GREATER_AND))
+ return (character);
+
+tokword:
+ /* Okay, if we got this far, we have to read a word. Read one,
+ and then check it against the known ones. */
+ result = read_token_word (character);
+#if defined (ALIAS)
+ if (result == RE_READ_TOKEN)
+ goto re_read_token;
+#endif
+ return result;
+}
+
+/*
+ * Match a $(...) or other grouping construct. This has to handle embedded
+ * quoted strings ('', ``, "") and nested constructs. It also must handle
+ * reprompting the user, if necessary, after reading a newline, and returning
+ * correct error values if it reads EOF.
+ */
+#define P_FIRSTCLOSE 0x0001
+#define P_ALLOWESC 0x0002
+#define P_DQUOTE 0x0004
+#define P_COMMAND 0x0008 /* parsing a command, so look for comments */
+#define P_BACKQUOTE 0x0010 /* parsing a backquoted command substitution */
+#define P_ARRAYSUB 0x0020 /* parsing a [...] array subscript for assignment */
+#define P_DOLBRACE 0x0040 /* parsing a ${...} construct */
+
+/* Lexical state while parsing a grouping construct or $(...). */
+#define LEX_WASDOL 0x001
+#define LEX_CKCOMMENT 0x002
+#define LEX_INCOMMENT 0x004
+#define LEX_PASSNEXT 0x008
+#define LEX_RESWDOK 0x010
+#define LEX_CKCASE 0x020
+#define LEX_INCASE 0x040
+#define LEX_INHEREDOC 0x080
+#define LEX_HEREDELIM 0x100 /* reading here-doc delimiter */
+#define LEX_STRIPDOC 0x200 /* <<- strip tabs from here doc delim */
+#define LEX_INWORD 0x400
+
+#define COMSUB_META(ch) ((ch) == ';' || (ch) == '&' || (ch) == '|')
+
+#define CHECK_NESTRET_ERROR() \
+ do { \
+ if (nestret == &matched_pair_error) \
+ { \
+ free (ret); \
+ return &matched_pair_error; \
+ } \
+ } while (0)
+
+#define APPEND_NESTRET() \
+ do { \
+ if (nestlen) \
+ { \
+ RESIZE_MALLOCED_BUFFER (ret, retind, nestlen, retsize, 64); \
+ strcpy (ret + retind, nestret); \
+ retind += nestlen; \
+ } \
+ } while (0)
+
+static char matched_pair_error;
+
+static char *
+parse_matched_pair (qc, open, close, lenp, flags)
+ int qc; /* `"' if this construct is within double quotes */
+ int open, close;
+ int *lenp, flags;
+{
+ int count, ch, tflags;
+ int nestlen, ttranslen, start_lineno;
+ char *ret, *nestret, *ttrans;
+ int retind, retsize, rflags;
+ int dolbrace_state;
+
+ dolbrace_state = (flags & P_DOLBRACE) ? DOLBRACE_PARAM : 0;
+
+/*itrace("parse_matched_pair[%d]: open = %c close = %c flags = %d", line_number, open, close, flags);*/
+ count = 1;
+ tflags = 0;
+
+ if ((flags & P_COMMAND) && qc != '`' && qc != '\'' && qc != '"' && (flags & P_DQUOTE) == 0)
+ tflags |= LEX_CKCOMMENT;
+
+ /* RFLAGS is the set of flags we want to pass to recursive calls. */
+ rflags = (qc == '"') ? P_DQUOTE : (flags & P_DQUOTE);
+
+ ret = (char *)xmalloc (retsize = 64);
+ retind = 0;
+
+ start_lineno = line_number;
+ while (count)
+ {
+ ch = shell_getc (qc != '\'' && (tflags & (LEX_PASSNEXT)) == 0);
+
+ if (ch == EOF)
+ {
+ free (ret);
+ parser_error (start_lineno, _("unexpected EOF while looking for matching `%c'"), close);
+ EOF_Reached = 1; /* XXX */
+ return (&matched_pair_error);
+ }
+
+ /* Possible reprompting. */
+ if (ch == '\n' && SHOULD_PROMPT ())
+ prompt_again ();
+
+ /* Don't bother counting parens or doing anything else if in a comment
+ or part of a case statement */
+ if (tflags & LEX_INCOMMENT)
+ {
+ /* Add this character. */
+ RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
+ ret[retind++] = ch;
+
+ if (ch == '\n')
+ tflags &= ~LEX_INCOMMENT;
+
+ continue;
+ }
+
+ /* Not exactly right yet, should handle shell metacharacters, too. If
+ any changes are made to this test, make analogous changes to subst.c:
+ extract_delimited_string(). */
+ else if MBTEST((tflags & LEX_CKCOMMENT) && (tflags & LEX_INCOMMENT) == 0 && ch == '#' && (retind == 0 || ret[retind-1] == '\n' || shellblank (ret[retind - 1])))
+ tflags |= LEX_INCOMMENT;
+
+ if (tflags & LEX_PASSNEXT) /* last char was backslash */
+ {
+ tflags &= ~LEX_PASSNEXT;
+ if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */
+ {
+ if (retind > 0)
+ retind--; /* swallow previously-added backslash */
+ continue;
+ }
+
+ RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
+ if MBTEST(ch == CTLESC)
+ ret[retind++] = CTLESC;
+ ret[retind++] = ch;
+ continue;
+ }
+ /* If we're reparsing the input (e.g., from parse_string_to_word_list),
+ we've already prepended CTLESC to single-quoted results of $'...'.
+ We may want to do this for other CTLESC-quoted characters in
+ reparse, too. */
+ else if MBTEST((parser_state & PST_REPARSE) && open == '\'' && (ch == CTLESC || ch == CTLNUL))
+ {
+ RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
+ ret[retind++] = ch;
+ continue;
+ }
+ else if MBTEST(ch == CTLESC || ch == CTLNUL) /* special shell escapes */
+ {
+ RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
+ ret[retind++] = CTLESC;
+ ret[retind++] = ch;
+ continue;
+ }
+ else if MBTEST(ch == close) /* ending delimiter */
+ count--;
+ /* handle nested ${...} specially. */
+ else if MBTEST(open != close && (tflags & LEX_WASDOL) && open == '{' && ch == open) /* } */
+ count++;
+ else if MBTEST(((flags & P_FIRSTCLOSE) == 0) && ch == open) /* nested begin */
+ count++;
+
+ /* Add this character. */
+ RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
+ ret[retind++] = ch;
+
+ /* If we just read the ending character, don't bother continuing. */
+ if (count == 0)
+ break;
+
+ if (open == '\'') /* '' inside grouping construct */
+ {
+ if MBTEST((flags & P_ALLOWESC) && ch == '\\')
+ tflags |= LEX_PASSNEXT;
+ continue;
+ }
+
+ if MBTEST(ch == '\\') /* backslashes */
+ tflags |= LEX_PASSNEXT;
+
+ /* Based on which dolstate is currently in (param, op, or word),
+ decide what the op is. We're really only concerned if it's % or
+ #, so we can turn on a flag that says whether or not we should
+ treat single quotes as special when inside a double-quoted
+ ${...}. This logic must agree with subst.c:extract_dollar_brace_string
+ since they share the same defines. */
+ /* FLAG POSIX INTERP 221 */
+ if (flags & P_DOLBRACE)
+ {
+ /* ${param%[%]word} */
+ if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '%' && retind > 1)
+ dolbrace_state = DOLBRACE_QUOTE;
+ /* ${param#[#]word} */
+ else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '#' && retind > 1)
+ dolbrace_state = DOLBRACE_QUOTE;
+ /* ${param/[/]pat/rep} */
+ else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '/' && retind > 1)
+{
+itrace("parse_matched_pair: dolbrace_state -> DOLBRACE_QUOTE2");
+ dolbrace_state = DOLBRACE_QUOTE2; /* XXX */
+}
+ /* ${param^[^]pat} */
+ else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '^' && retind > 1)
+ dolbrace_state = DOLBRACE_QUOTE;
+ /* ${param,[,]pat} */
+ else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == ',' && retind > 1)
+ dolbrace_state = DOLBRACE_QUOTE;
+ else if MBTEST(dolbrace_state == DOLBRACE_PARAM && strchr ("#%^,~:-=?+/", ch) != 0)
+ dolbrace_state = DOLBRACE_OP;
+ else if MBTEST(dolbrace_state == DOLBRACE_OP && strchr ("#%^,~:-=?+/", ch) == 0)
+ dolbrace_state = DOLBRACE_WORD;
+ }
+
+ /* The big hammer. Single quotes aren't special in double quotes. The
+ problem is that Posix used to say the single quotes are semi-special:
+ within a double-quoted ${...} construct "an even number of
+ unescaped double-quotes or single-quotes, if any, shall occur." */
+ /* This was changed in Austin Group Interp 221 */
+ if MBTEST(posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && dolbrace_state != DOLBRACE_QUOTE2 && (flags & P_DQUOTE) && (flags & P_DOLBRACE) && ch == '\'')
+ continue;
+
+ /* Could also check open == '`' if we want to parse grouping constructs
+ inside old-style command substitution. */
+ if (open != close) /* a grouping construct */
+ {
+ if MBTEST(shellquote (ch))
+ {
+ /* '', ``, or "" inside $(...) or other grouping construct. */
+ push_delimiter (dstack, ch);
+ if MBTEST((tflags & LEX_WASDOL) && ch == '\'') /* $'...' inside group */
+ nestret = parse_matched_pair (ch, ch, ch, &nestlen, P_ALLOWESC|rflags);
+ else
+ nestret = parse_matched_pair (ch, ch, ch, &nestlen, rflags);
+ pop_delimiter (dstack);
+ CHECK_NESTRET_ERROR ();
+
+ if MBTEST((tflags & LEX_WASDOL) && ch == '\'' && (extended_quote || (rflags & P_DQUOTE) == 0))
+ {
+ /* Translate $'...' here. */
+ ttrans = ansiexpand (nestret, 0, nestlen - 1, &ttranslen);
+ xfree (nestret);
+
+ /* If we're parsing a double-quoted brace expansion and we are
+ not in a place where single quotes are treated specially,
+ make sure we single-quote the results of the ansi
+ expansion because quote removal should remove them later */
+ /* FLAG POSIX INTERP 221 */
+ if ((shell_compatibility_level > 42) && (rflags & P_DQUOTE) && (dolbrace_state == DOLBRACE_QUOTE2) && (flags & P_DOLBRACE))
+ {
+itrace("parse_matched_pair: calling sh_single_quote on %s", ttrans);
+ nestret = sh_single_quote (ttrans);
+ free (ttrans);
+ nestlen = strlen (nestret);
+ }
+ else if ((rflags & P_DQUOTE) == 0)
+ {
+ nestret = sh_single_quote (ttrans);
+ free (ttrans);
+ nestlen = strlen (nestret);
+ }
+ else
+ {
+ nestret = ttrans;
+ nestlen = ttranslen;
+ }
+ retind -= 2; /* back up before the $' */
+ }
+ else if MBTEST((tflags & LEX_WASDOL) && ch == '"' && (extended_quote || (rflags & P_DQUOTE) == 0))
+ {
+ /* Locale expand $"..." here. */
+ ttrans = localeexpand (nestret, 0, nestlen - 1, start_lineno, &ttranslen);
+ xfree (nestret);
+
+ nestret = sh_mkdoublequoted (ttrans, ttranslen, 0);
+ free (ttrans);
+ nestlen = ttranslen + 2;
+ retind -= 2; /* back up before the $" */
+ }
+
+ APPEND_NESTRET ();
+ FREE (nestret);
+ }
+ else if ((flags & P_ARRAYSUB) && (tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */
+ goto parse_dollar_word;
+ }
+ /* Parse an old-style command substitution within double quotes as a
+ single word. */
+ /* XXX - sh and ksh93 don't do this - XXX */
+ else if MBTEST(open == '"' && ch == '`')
+ {
+ nestret = parse_matched_pair (0, '`', '`', &nestlen, rflags);
+
+ CHECK_NESTRET_ERROR ();
+ APPEND_NESTRET ();
+
+ FREE (nestret);
+ }
+ else if MBTEST(open != '`' && (tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */
+ /* check for $(), $[], or ${} inside quoted string. */
+ {
+parse_dollar_word:
+ if (open == ch) /* undo previous increment */
+ count--;
+ if (ch == '(') /* ) */
+ nestret = parse_comsub (0, '(', ')', &nestlen, (rflags|P_COMMAND) & ~P_DQUOTE);
+ else if (ch == '{') /* } */
+ nestret = parse_matched_pair (0, '{', '}', &nestlen, P_FIRSTCLOSE|P_DOLBRACE|rflags);
+ else if (ch == '[') /* ] */
+ nestret = parse_matched_pair (0, '[', ']', &nestlen, rflags);
+
+ CHECK_NESTRET_ERROR ();
+ APPEND_NESTRET ();
+
+ FREE (nestret);
+ }
+ if MBTEST(ch == '$')
+ tflags |= LEX_WASDOL;
+ else
+ tflags &= ~LEX_WASDOL;
+ }
+
+ ret[retind] = '\0';
+ if (lenp)
+ *lenp = retind;
+/*itrace("parse_matched_pair[%d]: returning %s", line_number, ret);*/
+ return ret;
+}
+
+/* Parse a $(...) command substitution. This is messier than I'd like, and
+ reproduces a lot more of the token-reading code than I'd like. */
+static char *
+parse_comsub (qc, open, close, lenp, flags)
+ int qc; /* `"' if this construct is within double quotes */
+ int open, close;
+ int *lenp, flags;
+{
+ int count, ch, peekc, tflags, lex_rwlen, lex_wlen, lex_firstind;
+ int nestlen, ttranslen, start_lineno;
+ char *ret, *nestret, *ttrans, *heredelim;
+ int retind, retsize, rflags, hdlen;
+
+ /* Posix interp 217 says arithmetic expressions have precedence, so
+ assume $(( introduces arithmetic expansion and parse accordingly. */
+ peekc = shell_getc (0);
+ shell_ungetc (peekc);
+ if (peekc == '(')
+ return (parse_matched_pair (qc, open, close, lenp, 0));
+
+/*itrace("parse_comsub: qc = `%c' open = %c close = %c", qc, open, close);*/
+ count = 1;
+ tflags = LEX_RESWDOK;
+
+ if ((flags & P_COMMAND) && qc != '\'' && qc != '"' && (flags & P_DQUOTE) == 0)
+ tflags |= LEX_CKCASE;
+ if ((tflags & LEX_CKCASE) && (interactive == 0 || interactive_comments))
+ tflags |= LEX_CKCOMMENT;
+
+ /* RFLAGS is the set of flags we want to pass to recursive calls. */
+ rflags = (flags & P_DQUOTE);
+
+ ret = (char *)xmalloc (retsize = 64);
+ retind = 0;
+
+ start_lineno = line_number;
+ lex_rwlen = lex_wlen = 0;
+
+ heredelim = 0;
+ lex_firstind = -1;
+
+ while (count)
+ {
+comsub_readchar:
+ ch = shell_getc (qc != '\'' && (tflags & (LEX_INCOMMENT|LEX_PASSNEXT)) == 0);
+
+ if (ch == EOF)
+ {
+eof_error:
+ free (ret);
+ FREE (heredelim);
+ parser_error (start_lineno, _("unexpected EOF while looking for matching `%c'"), close);
+ EOF_Reached = 1; /* XXX */
+ return (&matched_pair_error);
+ }
+
+ /* If we hit the end of a line and are reading the contents of a here
+ document, and it's not the same line that the document starts on,
+ check for this line being the here doc delimiter. Otherwise, if
+ we're in a here document, mark the next character as the beginning
+ of a line. */
+ if (ch == '\n')
+ {
+ if ((tflags & LEX_HEREDELIM) && heredelim)
+ {
+ tflags &= ~LEX_HEREDELIM;
+ tflags |= LEX_INHEREDOC;
+ lex_firstind = retind + 1;
+ }
+ else if (tflags & LEX_INHEREDOC)
+ {
+ int tind;
+ tind = lex_firstind;
+ while ((tflags & LEX_STRIPDOC) && ret[tind] == '\t')
+ tind++;
+ if (STREQN (ret + tind, heredelim, hdlen))
+ {
+ tflags &= ~(LEX_STRIPDOC|LEX_INHEREDOC);
+/*itrace("parse_comsub:%d: found here doc end `%s'", line_number, ret + tind);*/
+ free (heredelim);
+ heredelim = 0;
+ lex_firstind = -1;
+ }
+ else
+ lex_firstind = retind + 1;
+ }
+ }
+
+ /* Possible reprompting. */
+ if (ch == '\n' && SHOULD_PROMPT ())
+ prompt_again ();
+
+ /* XXX -- possibly allow here doc to be delimited by ending right
+ paren. */
+ if ((tflags & LEX_INHEREDOC) && ch == close && count == 1)
+ {
+ int tind;
+/*itrace("parse_comsub: in here doc, ch == close, retind - firstind = %d hdlen = %d retind = %d", retind-lex_firstind, hdlen, retind);*/
+ tind = lex_firstind;
+ while ((tflags & LEX_STRIPDOC) && ret[tind] == '\t')
+ tind++;
+ if (retind-tind == hdlen && STREQN (ret + tind, heredelim, hdlen))
+ {
+ tflags &= ~(LEX_STRIPDOC|LEX_INHEREDOC);
+/*itrace("parse_comsub:%d: found here doc end `%s'", line_number, ret + tind);*/
+ free (heredelim);
+ heredelim = 0;
+ lex_firstind = -1;
+ }
+ }
+
+ /* Don't bother counting parens or doing anything else if in a comment */
+ if (tflags & (LEX_INCOMMENT|LEX_INHEREDOC))
+ {
+ /* Add this character. */
+ RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
+ ret[retind++] = ch;
+
+ if ((tflags & LEX_INCOMMENT) && ch == '\n')
+ {
+/*itrace("parse_comsub:%d: lex_incomment -> 0 ch = `%c'", line_number, ch);*/
+ tflags &= ~LEX_INCOMMENT;
+ }
+
+ continue;
+ }
+
+ if (tflags & LEX_PASSNEXT) /* last char was backslash */
+ {
+/*itrace("parse_comsub:%d: lex_passnext -> 0 ch = `%c' (%d)", line_number, ch, __LINE__);*/
+ tflags &= ~LEX_PASSNEXT;
+ if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */
+ {
+ if (retind > 0)
+ retind--; /* swallow previously-added backslash */
+ continue;
+ }
+
+ RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
+ if MBTEST(ch == CTLESC)
+ ret[retind++] = CTLESC;
+ ret[retind++] = ch;
+ continue;
+ }
+
+ /* If this is a shell break character, we are not in a word. If not,
+ we either start or continue a word. */
+ if MBTEST(shellbreak (ch))
+ {
+ tflags &= ~LEX_INWORD;
+/*itrace("parse_comsub:%d: lex_inword -> 0 ch = `%c' (%d)", line_number, ch, __LINE__);*/
+ }
+ else
+ {
+ if (tflags & LEX_INWORD)
+ {
+ lex_wlen++;
+/*itrace("parse_comsub:%d: lex_inword == 1 ch = `%c' lex_wlen = %d (%d)", line_number, ch, lex_wlen, __LINE__);*/
+ }
+ else
+ {
+/*itrace("parse_comsub:%d: lex_inword -> 1 ch = `%c' (%d)", line_number, ch, __LINE__);*/
+ tflags |= LEX_INWORD;
+ lex_wlen = 0;
+ }
+ }
+
+ /* Skip whitespace */
+ if MBTEST(shellblank (ch) && (tflags & LEX_HEREDELIM) == 0 && lex_rwlen == 0)
+ {
+ /* Add this character. */
+ RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
+ ret[retind++] = ch;
+ continue;
+ }
+
+ /* Either we are looking for the start of the here-doc delimiter
+ (lex_firstind == -1) or we are reading one (lex_firstind >= 0).
+ If this character is a shell break character and we are reading
+ the delimiter, save it and note that we are now reading a here
+ document. If we've found the start of the delimiter, note it by
+ setting lex_firstind. Backslashes can quote shell metacharacters
+ in here-doc delimiters. */
+ if (tflags & LEX_HEREDELIM)
+ {
+ if (lex_firstind == -1 && shellbreak (ch) == 0)
+ lex_firstind = retind;
+#if 0
+ else if (heredelim && (tflags & LEX_PASSNEXT) == 0 && ch == '\n')
+ {
+ tflags |= LEX_INHEREDOC;
+ tflags &= ~LEX_HEREDELIM;
+ lex_firstind = retind + 1;
+ }
+#endif
+ else if (lex_firstind >= 0 && (tflags & LEX_PASSNEXT) == 0 && shellbreak (ch))
+ {
+ if (heredelim == 0)
+ {
+ nestret = substring (ret, lex_firstind, retind);
+ heredelim = string_quote_removal (nestret, 0);
+ free (nestret);
+ hdlen = STRLEN(heredelim);
+/*itrace("parse_comsub:%d: found here doc delimiter `%s' (%d)", line_number, heredelim, hdlen);*/
+ }
+ if (ch == '\n')
+ {
+ tflags |= LEX_INHEREDOC;
+ tflags &= ~LEX_HEREDELIM;
+ lex_firstind = retind + 1;
+ }
+ else
+ lex_firstind = -1;
+ }
+ }
+
+ /* Meta-characters that can introduce a reserved word. Not perfect yet. */
+ if MBTEST((tflags & LEX_RESWDOK) == 0 && (tflags & LEX_CKCASE) && (tflags & LEX_INCOMMENT) == 0 && (shellmeta(ch) || ch == '\n'))
+ {
+ /* Add this character. */
+ RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
+ ret[retind++] = ch;
+ peekc = shell_getc (1);
+ if (ch == peekc && (ch == '&' || ch == '|' || ch == ';')) /* two-character tokens */
+ {
+ RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
+ ret[retind++] = peekc;
+/*itrace("parse_comsub:%d: set lex_reswordok = 1, ch = `%c'", line_number, ch);*/
+ tflags |= LEX_RESWDOK;
+ lex_rwlen = 0;
+ continue;
+ }
+ else if (ch == '\n' || COMSUB_META(ch))
+ {
+ shell_ungetc (peekc);
+/*itrace("parse_comsub:%d: set lex_reswordok = 1, ch = `%c'", line_number, ch);*/
+ tflags |= LEX_RESWDOK;
+ lex_rwlen = 0;
+ continue;
+ }
+ else if (ch == EOF)
+ goto eof_error;
+ else
+ {
+ /* `unget' the character we just added and fall through */
+ retind--;
+ shell_ungetc (peekc);
+ }
+ }
+
+ /* If we can read a reserved word, try to read one. */
+ if (tflags & LEX_RESWDOK)
+ {
+ if MBTEST(islower (ch))
+ {
+ /* Add this character. */
+ RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
+ ret[retind++] = ch;
+ lex_rwlen++;
+ continue;
+ }
+ else if MBTEST(lex_rwlen == 4 && shellbreak (ch))
+ {
+ if (STREQN (ret + retind - 4, "case", 4))
+ {
+ tflags |= LEX_INCASE;
+/*itrace("parse_comsub:%d: found `case', lex_incase -> 1 lex_reswdok -> 0", line_number);*/
+ }
+ else if (STREQN (ret + retind - 4, "esac", 4))
+ {
+ tflags &= ~LEX_INCASE;
+/*itrace("parse_comsub:%d: found `esac', lex_incase -> 0 lex_reswdok -> 0", line_number);*/
+ }
+ tflags &= ~LEX_RESWDOK;
+ }
+ else if MBTEST((tflags & LEX_CKCOMMENT) && ch == '#' && (lex_rwlen == 0 || ((tflags & LEX_INWORD) && lex_wlen == 0)))
+ ; /* don't modify LEX_RESWDOK if we're starting a comment */
+ /* Allow `do' followed by space, tab, or newline to preserve the
+ RESWDOK flag, but reset the reserved word length counter so we
+ can read another one. */
+ else if MBTEST(((tflags & LEX_INCASE) == 0) &&
+ (isblank(ch) || ch == '\n') &&
+ lex_rwlen == 2 &&
+ STREQN (ret + retind - 2, "do", 2))
+ {
+/*itrace("parse_comsub:%d: lex_incase == 1 found `%c', found \"do\"", line_number, ch);*/
+ lex_rwlen = 0;
+ }
+ else if MBTEST((tflags & LEX_INCASE) && ch != '\n')
+ /* If we can read a reserved word and we're in case, we're at the
+ point where we can read a new pattern list or an esac. We
+ handle the esac case above. If we read a newline, we want to
+ leave LEX_RESWDOK alone. If we read anything else, we want to
+ turn off LEX_RESWDOK, since we're going to read a pattern list. */
+ {
+ tflags &= ~LEX_RESWDOK;
+/*itrace("parse_comsub:%d: lex_incase == 1 found `%c', lex_reswordok -> 0", line_number, ch);*/
+ }
+ else if MBTEST(shellbreak (ch) == 0)
+ {
+ tflags &= ~LEX_RESWDOK;
+/*itrace("parse_comsub:%d: found `%c', lex_reswordok -> 0", line_number, ch);*/
+ }
+#if 0
+ /* If we find a space or tab but have read something and it's not
+ `do', turn off the reserved-word-ok flag */
+ else if MBTEST(isblank (ch) && lex_rwlen > 0)
+ {
+ tflags &= ~LEX_RESWDOK;
+/*itrace("parse_comsub:%d: found `%c', lex_reswordok -> 0", line_number, ch);*/
+ }
+#endif
+ }
+
+ /* Might be the start of a here-doc delimiter */
+ if MBTEST((tflags & LEX_INCOMMENT) == 0 && (tflags & LEX_CKCASE) && ch == '<')
+ {
+ /* Add this character. */
+ RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
+ ret[retind++] = ch;
+ peekc = shell_getc (1);
+ if (peekc == EOF)
+ goto eof_error;
+ if (peekc == ch)
+ {
+ RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
+ ret[retind++] = peekc;
+ peekc = shell_getc (1);
+ if (peekc == EOF)
+ goto eof_error;
+ if (peekc == '-')
+ {
+ RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
+ ret[retind++] = peekc;
+ tflags |= LEX_STRIPDOC;
+ }
+ else
+ shell_ungetc (peekc);
+ if (peekc != '<')
+ {
+ tflags |= LEX_HEREDELIM;
+ lex_firstind = -1;
+ }
+ continue;
+ }
+ else
+ ch = peekc; /* fall through and continue XXX */
+ }
+ else if MBTEST((tflags & LEX_CKCOMMENT) && (tflags & LEX_INCOMMENT) == 0 && ch == '#' && (((tflags & LEX_RESWDOK) && lex_rwlen == 0) || ((tflags & LEX_INWORD) && lex_wlen == 0)))
+ {
+/*itrace("parse_comsub:%d: lex_incomment -> 1 (%d)", line_number, __LINE__);*/
+ tflags |= LEX_INCOMMENT;
+ }
+
+ if MBTEST(ch == CTLESC || ch == CTLNUL) /* special shell escapes */
+ {
+ RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
+ ret[retind++] = CTLESC;
+ ret[retind++] = ch;
+ continue;
+ }
+#if 0
+ else if MBTEST((tflags & LEX_INCASE) && ch == close && close == ')')
+ tflags &= ~LEX_INCASE; /* XXX */
+#endif
+ else if MBTEST(ch == close && (tflags & LEX_INCASE) == 0) /* ending delimiter */
+ {
+ count--;
+/*itrace("parse_comsub:%d: found close: count = %d", line_number, count);*/
+ }
+ else if MBTEST(((flags & P_FIRSTCLOSE) == 0) && (tflags & LEX_INCASE) == 0 && ch == open) /* nested begin */
+ {
+ count++;
+/*itrace("parse_comsub:%d: found open: count = %d", line_number, count);*/
+ }
+
+ /* Add this character. */
+ RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
+ ret[retind++] = ch;
+
+ /* If we just read the ending character, don't bother continuing. */
+ if (count == 0)
+ break;
+
+ if MBTEST(ch == '\\') /* backslashes */
+ tflags |= LEX_PASSNEXT;
+
+ if MBTEST(shellquote (ch))
+ {
+ /* '', ``, or "" inside $(...). */
+ push_delimiter (dstack, ch);
+ if MBTEST((tflags & LEX_WASDOL) && ch == '\'') /* $'...' inside group */
+ nestret = parse_matched_pair (ch, ch, ch, &nestlen, P_ALLOWESC|rflags);
+ else
+ nestret = parse_matched_pair (ch, ch, ch, &nestlen, rflags);
+ pop_delimiter (dstack);
+ CHECK_NESTRET_ERROR ();
+
+ if MBTEST((tflags & LEX_WASDOL) && ch == '\'' && (extended_quote || (rflags & P_DQUOTE) == 0))
+ {
+ /* Translate $'...' here. */
+ ttrans = ansiexpand (nestret, 0, nestlen - 1, &ttranslen);
+ xfree (nestret);
+
+ if ((rflags & P_DQUOTE) == 0)
+ {
+ nestret = sh_single_quote (ttrans);
+ free (ttrans);
+ nestlen = strlen (nestret);
+ }
+ else
+ {
+ nestret = ttrans;
+ nestlen = ttranslen;
+ }
+ retind -= 2; /* back up before the $' */
+ }
+ else if MBTEST((tflags & LEX_WASDOL) && ch == '"' && (extended_quote || (rflags & P_DQUOTE) == 0))
+ {
+ /* Locale expand $"..." here. */
+ ttrans = localeexpand (nestret, 0, nestlen - 1, start_lineno, &ttranslen);
+ xfree (nestret);
+
+ nestret = sh_mkdoublequoted (ttrans, ttranslen, 0);
+ free (ttrans);
+ nestlen = ttranslen + 2;
+ retind -= 2; /* back up before the $" */
+ }
+
+ APPEND_NESTRET ();
+ FREE (nestret);
+ }
+ else if MBTEST((tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */
+ /* check for $(), $[], or ${} inside command substitution. */
+ {
+ if ((tflags & LEX_INCASE) == 0 && open == ch) /* undo previous increment */
+ count--;
+ if (ch == '(') /* ) */
+ nestret = parse_comsub (0, '(', ')', &nestlen, (rflags|P_COMMAND) & ~P_DQUOTE);
+ else if (ch == '{') /* } */
+ nestret = parse_matched_pair (0, '{', '}', &nestlen, P_FIRSTCLOSE|P_DOLBRACE|rflags);
+ else if (ch == '[') /* ] */
+ nestret = parse_matched_pair (0, '[', ']', &nestlen, rflags);
+
+ CHECK_NESTRET_ERROR ();
+ APPEND_NESTRET ();
+
+ FREE (nestret);
+ }
+ if MBTEST(ch == '$')
+ tflags |= LEX_WASDOL;
+ else
+ tflags &= ~LEX_WASDOL;
+ }
+
+ FREE (heredelim);
+ ret[retind] = '\0';
+ if (lenp)
+ *lenp = retind;
+/*itrace("parse_comsub:%d: returning `%s'", line_number, ret);*/
+ return ret;
+}
+
+/* Recursively call the parser to parse a $(...) command substitution. */
+char *
+xparse_dolparen (base, string, indp, flags)
+ char *base;
+ char *string;
+ int *indp;
+ int flags;
+{
+ sh_parser_state_t ps;
+ sh_input_line_state_t ls;
+ int orig_ind, nc, sflags, orig_eof_token;
+ char *ret, *s, *ep, *ostring;
+
+ /*yydebug = 1;*/
+ orig_ind = *indp;
+ ostring = string;
+
+/*itrace("xparse_dolparen: size = %d shell_input_line = `%s'", shell_input_line_size, shell_input_line);*/
+ sflags = SEVAL_NONINT|SEVAL_NOHIST|SEVAL_NOFREE;
+ if (flags & SX_NOLONGJMP)
+ sflags |= SEVAL_NOLONGJMP;
+ save_parser_state (&ps);
+ save_input_line_state (&ls);
+ orig_eof_token = shell_eof_token;
+
+ /*(*/
+ parser_state |= PST_CMDSUBST|PST_EOFTOKEN; /* allow instant ')' */ /*(*/
+ shell_eof_token = ')';
+ parse_string (string, "command substitution", sflags, &ep);
+
+ shell_eof_token = orig_eof_token;
+ restore_parser_state (&ps);
+ reset_parser ();
+ /* reset_parser clears shell_input_line and associated variables */
+ restore_input_line_state (&ls);
+ if (interactive)
+ token_to_read = 0;
+
+ /* Need to find how many characters parse_and_execute consumed, update
+ *indp, if flags != 0, copy the portion of the string parsed into RET
+ and return it. If flags & 1 (EX_NOALLOC) we can return NULL. */
+
+ /*(*/
+ if (ep[-1] != ')')
+ {
+#if DEBUG
+ if (ep[-1] != '\n')
+ itrace("xparse_dolparen:%d: ep[-1] != RPAREN (%d), ep = `%s'", line_number, ep[-1], ep);
+#endif
+ while (ep > ostring && ep[-1] == '\n') ep--;
+ }
+
+ nc = ep - ostring;
+ *indp = ep - base - 1;
+
+ /*(*/
+#if DEBUG
+ if (base[*indp] != ')')
+ itrace("xparse_dolparen:%d: base[%d] != RPAREN (%d), base = `%s'", line_number, *indp, base[*indp], base);
+#endif
+
+ if (flags & SX_NOALLOC)
+ return (char *)NULL;
+
+ if (nc == 0)
+ {
+ ret = xmalloc (1);
+ ret[0] = '\0';
+ }
+ else
+ ret = substring (ostring, 0, nc - 1);
+
+ return ret;
+}
+
+#if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND)
+/* Parse a double-paren construct. It can be either an arithmetic
+ command, an arithmetic `for' command, or a nested subshell. Returns
+ the parsed token, -1 on error, or -2 if we didn't do anything and
+ should just go on. */
+static int
+parse_dparen (c)
+ int c;
+{
+ int cmdtyp, sline;
+ char *wval;
+ WORD_DESC *wd;
+
+#if defined (ARITH_FOR_COMMAND)
+ if (last_read_token == FOR)
+ {
+ arith_for_lineno = line_number;
+ cmdtyp = parse_arith_cmd (&wval, 0);
+ if (cmdtyp == 1)
+ {
+ wd = alloc_word_desc ();
+ wd->word = wval;
+ yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL);
+ return (ARITH_FOR_EXPRS);
+ }
+ else
+ return -1; /* ERROR */
+ }
+#endif
+
+#if defined (DPAREN_ARITHMETIC)
+ if (reserved_word_acceptable (last_read_token))
+ {
+ sline = line_number;
+
+ cmdtyp = parse_arith_cmd (&wval, 0);
+ if (cmdtyp == 1) /* arithmetic command */
+ {
+ wd = alloc_word_desc ();
+ wd->word = wval;
+ wd->flags = W_QUOTED|W_NOSPLIT|W_NOGLOB|W_DQUOTE;
+ yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL);
+ return (ARITH_CMD);
+ }
+ else if (cmdtyp == 0) /* nested subshell */
+ {
+ push_string (wval, 0, (alias_t *)NULL);
+ pushed_string_list->flags = PSH_DPAREN;
+ if ((parser_state & PST_CASEPAT) == 0)
+ parser_state |= PST_SUBSHELL;
+ return (c);
+ }
+ else /* ERROR */
+ return -1;
+ }
+#endif
+
+ return -2; /* XXX */
+}
+
+/* We've seen a `(('. Look for the matching `))'. If we get it, return 1.
+ If not, assume it's a nested subshell for backwards compatibility and
+ return 0. In any case, put the characters we've consumed into a locally-
+ allocated buffer and make *ep point to that buffer. Return -1 on an
+ error, for example EOF. */
+static int
+parse_arith_cmd (ep, adddq)
+ char **ep;
+ int adddq;
+{
+ int exp_lineno, rval, c;
+ char *ttok, *tokstr;
+ int ttoklen;
+
+ exp_lineno = line_number;
+ ttok = parse_matched_pair (0, '(', ')', &ttoklen, 0);
+ rval = 1;
+ if (ttok == &matched_pair_error)
+ return -1;
+ /* Check that the next character is the closing right paren. If
+ not, this is a syntax error. ( */
+ c = shell_getc (0);
+ if MBTEST(c != ')')
+ rval = 0;
+
+ tokstr = (char *)xmalloc (ttoklen + 4);
+
+ /* if ADDDQ != 0 then (( ... )) -> "..." */
+ if (rval == 1 && adddq) /* arith cmd, add double quotes */
+ {
+ tokstr[0] = '"';
+ strncpy (tokstr + 1, ttok, ttoklen - 1);
+ tokstr[ttoklen] = '"';
+ tokstr[ttoklen+1] = '\0';
+ }
+ else if (rval == 1) /* arith cmd, don't add double quotes */
+ {
+ strncpy (tokstr, ttok, ttoklen - 1);
+ tokstr[ttoklen-1] = '\0';
+ }
+ else /* nested subshell */
+ {
+ tokstr[0] = '(';
+ strncpy (tokstr + 1, ttok, ttoklen - 1);
+ tokstr[ttoklen] = ')';
+ tokstr[ttoklen+1] = c;
+ tokstr[ttoklen+2] = '\0';
+ }
+
+ *ep = tokstr;
+ FREE (ttok);
+ return rval;
+}
+#endif /* DPAREN_ARITHMETIC || ARITH_FOR_COMMAND */
+
+#if defined (COND_COMMAND)
+static void
+cond_error ()
+{
+ char *etext;
+
+ if (EOF_Reached && cond_token != COND_ERROR) /* [[ */
+ parser_error (cond_lineno, _("unexpected EOF while looking for `]]'"));
+ else if (cond_token != COND_ERROR)
+ {
+ if (etext = error_token_from_token (cond_token))
+ {
+ parser_error (cond_lineno, _("syntax error in conditional expression: unexpected token `%s'"), etext);
+ free (etext);
+ }
+ else
+ parser_error (cond_lineno, _("syntax error in conditional expression"));
+ }
+}
+
+static COND_COM *
+cond_expr ()
+{
+ return (cond_or ());
+}
+
+static COND_COM *
+cond_or ()
+{
+ COND_COM *l, *r;
+
+ l = cond_and ();
+ if (cond_token == OR_OR)
+ {
+ r = cond_or ();
+ l = make_cond_node (COND_OR, (WORD_DESC *)NULL, l, r);
+ }
+ return l;
+}
+
+static COND_COM *
+cond_and ()
+{
+ COND_COM *l, *r;
+
+ l = cond_term ();
+ if (cond_token == AND_AND)
+ {
+ r = cond_and ();
+ l = make_cond_node (COND_AND, (WORD_DESC *)NULL, l, r);
+ }
+ return l;
+}
+
+static int
+cond_skip_newlines ()
+{
+ while ((cond_token = read_token (READ)) == '\n')
+ {
+ if (SHOULD_PROMPT ())
+ prompt_again ();
+ }
+ return (cond_token);
+}
+
+#define COND_RETURN_ERROR() \
+ do { cond_token = COND_ERROR; return ((COND_COM *)NULL); } while (0)
+
+static COND_COM *
+cond_term ()
+{
+ WORD_DESC *op;
+ COND_COM *term, *tleft, *tright;
+ int tok, lineno;
+ char *etext;
+
+ /* Read a token. It can be a left paren, a `!', a unary operator, or a
+ word that should be the first argument of a binary operator. Start by
+ skipping newlines, since this is a compound command. */
+ tok = cond_skip_newlines ();
+ lineno = line_number;
+ if (tok == COND_END)
+ {
+ COND_RETURN_ERROR ();
+ }
+ else if (tok == '(')
+ {
+ term = cond_expr ();
+ if (cond_token != ')')
+ {
+ if (term)
+ dispose_cond_node (term); /* ( */
+ if (etext = error_token_from_token (cond_token))
+ {
+ parser_error (lineno, _("unexpected token `%s', expected `)'"), etext);
+ free (etext);
+ }
+ else
+ parser_error (lineno, _("expected `)'"));
+ COND_RETURN_ERROR ();
+ }
+ term = make_cond_node (COND_EXPR, (WORD_DESC *)NULL, term, (COND_COM *)NULL);
+ (void)cond_skip_newlines ();
+ }
+ else if (tok == BANG || (tok == WORD && (yylval.word->word[0] == '!' && yylval.word->word[1] == '\0')))
+ {
+ if (tok == WORD)
+ dispose_word (yylval.word); /* not needed */
+ term = cond_term ();
+ if (term)
+ term->flags |= CMD_INVERT_RETURN;
+ }
+ else if (tok == WORD && yylval.word->word[0] == '-' && yylval.word->word[2] == 0 && test_unop (yylval.word->word))
+ {
+ op = yylval.word;
+ tok = read_token (READ);
+ if (tok == WORD)
+ {
+ tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL);
+ term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL);
+ }
+ else
+ {
+ dispose_word (op);
+ if (etext = error_token_from_token (tok))
+ {
+ parser_error (line_number, _("unexpected argument `%s' to conditional unary operator"), etext);
+ free (etext);
+ }
+ else
+ parser_error (line_number, _("unexpected argument to conditional unary operator"));
+ COND_RETURN_ERROR ();
+ }
+
+ (void)cond_skip_newlines ();
+ }
+ else if (tok == WORD) /* left argument to binary operator */
+ {
+ /* lhs */
+ tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL);
+
+ /* binop */
+ tok = read_token (READ);
+ if (tok == WORD && test_binop (yylval.word->word))
+ {
+ op = yylval.word;
+ if (op->word[0] == '=' && (op->word[1] == '\0' || (op->word[1] == '=' && op->word[2] == '\0')))
+ parser_state |= PST_EXTPAT;
+ else if (op->word[0] == '!' && op->word[1] == '=' && op->word[2] == '\0')
+ parser_state |= PST_EXTPAT;
+ }
+#if defined (COND_REGEXP)
+ else if (tok == WORD && STREQ (yylval.word->word, "=~"))
+ {
+ op = yylval.word;
+ parser_state |= PST_REGEXP;
+ }
+#endif
+ else if (tok == '<' || tok == '>')
+ op = make_word_from_token (tok); /* ( */
+ /* There should be a check before blindly accepting the `)' that we have
+ seen the opening `('. */
+ else if (tok == COND_END || tok == AND_AND || tok == OR_OR || tok == ')')
+ {
+ /* Special case. [[ x ]] is equivalent to [[ -n x ]], just like
+ the test command. Similarly for [[ x && expr ]] or
+ [[ x || expr ]] or [[ (x) ]]. */
+ op = make_word ("-n");
+ term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL);
+ cond_token = tok;
+ return (term);
+ }
+ else
+ {
+ if (etext = error_token_from_token (tok))
+ {
+ parser_error (line_number, _("unexpected token `%s', conditional binary operator expected"), etext);
+ free (etext);
+ }
+ else
+ parser_error (line_number, _("conditional binary operator expected"));
+ dispose_cond_node (tleft);
+ COND_RETURN_ERROR ();
+ }
+
+ /* rhs */
+ if (parser_state & PST_EXTPAT)
+ extended_glob = 1;
+ tok = read_token (READ);
+ if (parser_state & PST_EXTPAT)
+ extended_glob = global_extglob;
+ parser_state &= ~(PST_REGEXP|PST_EXTPAT);
+
+ if (tok == WORD)
+ {
+ tright = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL);
+ term = make_cond_node (COND_BINARY, op, tleft, tright);
+ }
+ else
+ {
+ if (etext = error_token_from_token (tok))
+ {
+ parser_error (line_number, _("unexpected argument `%s' to conditional binary operator"), etext);
+ free (etext);
+ }
+ else
+ parser_error (line_number, _("unexpected argument to conditional binary operator"));
+ dispose_cond_node (tleft);
+ dispose_word (op);
+ COND_RETURN_ERROR ();
+ }
+
+ (void)cond_skip_newlines ();
+ }
+ else
+ {
+ if (tok < 256)
+ parser_error (line_number, _("unexpected token `%c' in conditional command"), tok);
+ else if (etext = error_token_from_token (tok))
+ {
+ parser_error (line_number, _("unexpected token `%s' in conditional command"), etext);
+ free (etext);
+ }
+ else
+ parser_error (line_number, _("unexpected token %d in conditional command"), tok);
+ COND_RETURN_ERROR ();
+ }
+ return (term);
+}
+
+/* This is kind of bogus -- we slip a mini recursive-descent parser in
+ here to handle the conditional statement syntax. */
+static COMMAND *
+parse_cond_command ()
+{
+ COND_COM *cexp;
+
+ global_extglob = extended_glob;
+ cexp = cond_expr ();
+ return (make_cond_command (cexp));
+}
+#endif
+
+#if defined (ARRAY_VARS)
+/* When this is called, it's guaranteed that we don't care about anything
+ in t beyond i. We do save and restore the chars, though. */
+static int
+token_is_assignment (t, i)
+ char *t;
+ int i;
+{
+ unsigned char c, c1;
+ int r;
+
+ c = t[i]; c1 = t[i+1];
+ t[i] = '='; t[i+1] = '\0';
+ r = assignment (t, (parser_state & PST_COMPASSIGN) != 0);
+ t[i] = c; t[i+1] = c1;
+ return r;
+}
+
+/* XXX - possible changes here for `+=' */
+static int
+token_is_ident (t, i)
+ char *t;
+ int i;
+{
+ unsigned char c;
+ int r;
+
+ c = t[i];
+ t[i] = '\0';
+ r = legal_identifier (t);
+ t[i] = c;
+ return r;
+}
+#endif
+
+static int
+read_token_word (character)
+ int character;
+{
+ /* The value for YYLVAL when a WORD is read. */
+ WORD_DESC *the_word;
+
+ /* Index into the token that we are building. */
+ int token_index;
+
+ /* ALL_DIGITS becomes zero when we see a non-digit. */
+ int all_digit_token;
+
+ /* DOLLAR_PRESENT becomes non-zero if we see a `$'. */
+ int dollar_present;
+
+ /* COMPOUND_ASSIGNMENT becomes non-zero if we are parsing a compound
+ assignment. */
+ int compound_assignment;
+
+ /* QUOTED becomes non-zero if we see one of ("), ('), (`), or (\). */
+ int quoted;
+
+ /* Non-zero means to ignore the value of the next character, and just
+ to add it no matter what. */
+ int pass_next_character;
+
+ /* The current delimiting character. */
+ int cd;
+ int result, peek_char;
+ char *ttok, *ttrans;
+ int ttoklen, ttranslen;
+ intmax_t lvalue;
+
+ if (token_buffer_size < TOKEN_DEFAULT_INITIAL_SIZE)
+ token = (char *)xrealloc (token, token_buffer_size = TOKEN_DEFAULT_INITIAL_SIZE);
+
+ token_index = 0;
+ all_digit_token = DIGIT (character);
+ dollar_present = quoted = pass_next_character = compound_assignment = 0;
+
+ for (;;)
+ {
+ if (character == EOF)
+ goto got_token;
+
+ if (pass_next_character)
+ {
+ pass_next_character = 0;
+ goto got_escaped_character;
+ }
+
+ cd = current_delimiter (dstack);
+
+ /* Handle backslashes. Quote lots of things when not inside of
+ double-quotes, quote some things inside of double-quotes. */
+ if MBTEST(character == '\\')
+ {
+ peek_char = shell_getc (0);
+
+ /* Backslash-newline is ignored in all cases except
+ when quoted with single quotes. */
+ if (peek_char == '\n')
+ {
+ character = '\n';
+ goto next_character;
+ }
+ else
+ {
+ shell_ungetc (peek_char);
+
+ /* If the next character is to be quoted, note it now. */
+ if (cd == 0 || cd == '`' ||
+ (cd == '"' && peek_char >= 0 && (sh_syntaxtab[peek_char] & CBSDQUOTE)))
+ pass_next_character++;
+
+ quoted = 1;
+ goto got_character;
+ }
+ }
+
+ /* Parse a matched pair of quote characters. */
+ if MBTEST(shellquote (character))
+ {
+ push_delimiter (dstack, character);
+ ttok = parse_matched_pair (character, character, character, &ttoklen, (character == '`') ? P_COMMAND : 0);
+ pop_delimiter (dstack);
+ if (ttok == &matched_pair_error)
+ return -1; /* Bail immediately. */
+ RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2,
+ token_buffer_size, TOKEN_DEFAULT_GROW_SIZE);
+ token[token_index++] = character;
+ strcpy (token + token_index, ttok);
+ token_index += ttoklen;
+ all_digit_token = 0;
+ quoted = 1;
+ dollar_present |= (character == '"' && strchr (ttok, '$') != 0);
+ FREE (ttok);
+ goto next_character;
+ }
+
+#ifdef COND_REGEXP
+ /* When parsing a regexp as a single word inside a conditional command,
+ we need to special-case characters special to both the shell and
+ regular expressions. Right now, that is only '(' and '|'. */ /*)*/
+ if MBTEST((parser_state & PST_REGEXP) && (character == '(' || character == '|')) /*)*/
+ {
+ if (character == '|')
+ goto got_character;
+
+ push_delimiter (dstack, character);
+ ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0);
+ pop_delimiter (dstack);
+ if (ttok == &matched_pair_error)
+ return -1; /* Bail immediately. */
+ RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2,
+ token_buffer_size, TOKEN_DEFAULT_GROW_SIZE);
+ token[token_index++] = character;
+ strcpy (token + token_index, ttok);
+ token_index += ttoklen;
+ FREE (ttok);
+ dollar_present = all_digit_token = 0;
+ goto next_character;
+ }
+#endif /* COND_REGEXP */
+
+#ifdef EXTENDED_GLOB
+ /* Parse a ksh-style extended pattern matching specification. */
+ if MBTEST(extended_glob && PATTERN_CHAR (character))
+ {
+ peek_char = shell_getc (1);
+ if MBTEST(peek_char == '(') /* ) */
+ {
+ push_delimiter (dstack, peek_char);
+ ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0);
+ pop_delimiter (dstack);
+ if (ttok == &matched_pair_error)
+ return -1; /* Bail immediately. */
+ RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 3,
+ token_buffer_size,
+ TOKEN_DEFAULT_GROW_SIZE);
+ token[token_index++] = character;
+ token[token_index++] = peek_char;
+ strcpy (token + token_index, ttok);
+ token_index += ttoklen;
+ FREE (ttok);
+ dollar_present = all_digit_token = 0;
+ goto next_character;
+ }
+ else
+ shell_ungetc (peek_char);
+ }
+#endif /* EXTENDED_GLOB */
+
+ /* If the delimiter character is not single quote, parse some of
+ the shell expansions that must be read as a single word. */
+ if (shellexp (character))
+ {
+ peek_char = shell_getc (1);
+ /* $(...), <(...), >(...), $((...)), ${...}, and $[...] constructs */
+ if MBTEST(peek_char == '(' ||
+ ((peek_char == '{' || peek_char == '[') && character == '$')) /* ) ] } */
+ {
+ if (peek_char == '{') /* } */
+ ttok = parse_matched_pair (cd, '{', '}', &ttoklen, P_FIRSTCLOSE|P_DOLBRACE);
+ else if (peek_char == '(') /* ) */
+ {
+ /* XXX - push and pop the `(' as a delimiter for use by
+ the command-oriented-history code. This way newlines
+ appearing in the $(...) string get added to the
+ history literally rather than causing a possibly-
+ incorrect `;' to be added. ) */
+ push_delimiter (dstack, peek_char);
+ ttok = parse_comsub (cd, '(', ')', &ttoklen, P_COMMAND);
+ pop_delimiter (dstack);
+ }
+ else
+ ttok = parse_matched_pair (cd, '[', ']', &ttoklen, 0);
+ if (ttok == &matched_pair_error)
+ return -1; /* Bail immediately. */
+ RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 3,
+ token_buffer_size,
+ TOKEN_DEFAULT_GROW_SIZE);
+ token[token_index++] = character;
+ token[token_index++] = peek_char;
+ strcpy (token + token_index, ttok);
+ token_index += ttoklen;
+ FREE (ttok);
+ dollar_present = 1;
+ all_digit_token = 0;
+ goto next_character;
+ }
+ /* This handles $'...' and $"..." new-style quoted strings. */
+ else if MBTEST(character == '$' && (peek_char == '\'' || peek_char == '"'))
+ {
+ int first_line;
+
+ first_line = line_number;
+ push_delimiter (dstack, peek_char);
+ ttok = parse_matched_pair (peek_char, peek_char, peek_char,
+ &ttoklen,
+ (peek_char == '\'') ? P_ALLOWESC : 0);
+ pop_delimiter (dstack);
+ if (ttok == &matched_pair_error)
+ return -1;
+ if (peek_char == '\'')
+ {
+ ttrans = ansiexpand (ttok, 0, ttoklen - 1, &ttranslen);
+ free (ttok);
+
+ /* Insert the single quotes and correctly quote any
+ embedded single quotes (allowed because P_ALLOWESC was
+ passed to parse_matched_pair). */
+ ttok = sh_single_quote (ttrans);
+ free (ttrans);
+ ttranslen = strlen (ttok);
+ ttrans = ttok;
+ }
+ else
+ {
+ /* Try to locale-expand the converted string. */
+ ttrans = localeexpand (ttok, 0, ttoklen - 1, first_line, &ttranslen);
+ free (ttok);
+
+ /* Add the double quotes back */
+ ttok = sh_mkdoublequoted (ttrans, ttranslen, 0);
+ free (ttrans);
+ ttranslen += 2;
+ ttrans = ttok;
+ }
+
+ RESIZE_MALLOCED_BUFFER (token, token_index, ttranslen + 1,
+ token_buffer_size,
+ TOKEN_DEFAULT_GROW_SIZE);
+ strcpy (token + token_index, ttrans);
+ token_index += ttranslen;
+ FREE (ttrans);
+ quoted = 1;
+ all_digit_token = 0;
+ goto next_character;
+ }
+ /* This could eventually be extended to recognize all of the
+ shell's single-character parameter expansions, and set flags.*/
+ else if MBTEST(character == '$' && peek_char == '$')
+ {
+ RESIZE_MALLOCED_BUFFER (token, token_index, 3,
+ token_buffer_size,
+ TOKEN_DEFAULT_GROW_SIZE);
+ token[token_index++] = '$';
+ token[token_index++] = peek_char;
+ dollar_present = 1;
+ all_digit_token = 0;
+ goto next_character;
+ }
+ else
+ shell_ungetc (peek_char);
+ }
+
+#if defined (ARRAY_VARS)
+ /* Identify possible array subscript assignment; match [...]. If
+ parser_state&PST_COMPASSIGN, we need to parse [sub]=words treating
+ `sub' as if it were enclosed in double quotes. */
+ else if MBTEST(character == '[' && /* ] */
+ ((token_index > 0 && assignment_acceptable (last_read_token) && token_is_ident (token, token_index)) ||
+ (token_index == 0 && (parser_state&PST_COMPASSIGN))))
+ {
+ ttok = parse_matched_pair (cd, '[', ']', &ttoklen, P_ARRAYSUB);
+ if (ttok == &matched_pair_error)
+ return -1; /* Bail immediately. */
+ RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2,
+ token_buffer_size,
+ TOKEN_DEFAULT_GROW_SIZE);
+ token[token_index++] = character;
+ strcpy (token + token_index, ttok);
+ token_index += ttoklen;
+ FREE (ttok);
+ all_digit_token = 0;
+ goto next_character;
+ }
+ /* Identify possible compound array variable assignment. */
+ else if MBTEST(character == '=' && token_index > 0 && (assignment_acceptable (last_read_token) || (parser_state & PST_ASSIGNOK)) && token_is_assignment (token, token_index))
+ {
+ peek_char = shell_getc (1);
+ if MBTEST(peek_char == '(') /* ) */
+ {
+ ttok = parse_compound_assignment (&ttoklen);
+
+ RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 4,
+ token_buffer_size,
+ TOKEN_DEFAULT_GROW_SIZE);
+
+ token[token_index++] = '=';
+ token[token_index++] = '(';
+ if (ttok)
+ {
+ strcpy (token + token_index, ttok);
+ token_index += ttoklen;
+ }
+ token[token_index++] = ')';
+ FREE (ttok);
+ all_digit_token = 0;
+ compound_assignment = 1;
+#if 1
+ goto next_character;
+#else
+ goto got_token; /* ksh93 seems to do this */
+#endif
+ }
+ else
+ shell_ungetc (peek_char);
+ }
+#endif
+
+ /* When not parsing a multi-character word construct, shell meta-
+ characters break words. */
+ if MBTEST(shellbreak (character))
+ {
+ shell_ungetc (character);
+ goto got_token;
+ }
+
+got_character:
+
+ if (character == CTLESC || character == CTLNUL)
+ {
+ RESIZE_MALLOCED_BUFFER (token, token_index, 2, token_buffer_size,
+ TOKEN_DEFAULT_GROW_SIZE);
+ token[token_index++] = CTLESC;
+ }
+ else
+got_escaped_character:
+ RESIZE_MALLOCED_BUFFER (token, token_index, 1, token_buffer_size,
+ TOKEN_DEFAULT_GROW_SIZE);
+
+ token[token_index++] = character;
+
+ all_digit_token &= DIGIT (character);
+ dollar_present |= character == '$';
+
+ next_character:
+ if (character == '\n' && SHOULD_PROMPT ())
+ prompt_again ();
+
+ /* We want to remove quoted newlines (that is, a \<newline> pair)
+ unless we are within single quotes or pass_next_character is
+ set (the shell equivalent of literal-next). */
+ cd = current_delimiter (dstack);
+ character = shell_getc (cd != '\'' && pass_next_character == 0);
+ } /* end for (;;) */
+
+got_token:
+
+ /* Calls to RESIZE_MALLOCED_BUFFER ensure there is sufficient room. */
+ token[token_index] = '\0';
+
+ /* Check to see what thing we should return. If the last_read_token
+ is a `<', or a `&', or the character which ended this token is
+ a '>' or '<', then, and ONLY then, is this input token a NUMBER.
+ Otherwise, it is just a word, and should be returned as such. */
+ if MBTEST(all_digit_token && (character == '<' || character == '>' ||
+ last_read_token == LESS_AND ||
+ last_read_token == GREATER_AND))
+ {
+ if (legal_number (token, &lvalue) && (int)lvalue == lvalue)
+ {
+ yylval.number = lvalue;
+ return (NUMBER);
+ }
+ }
+
+ /* Check for special case tokens. */
+ result = (last_shell_getc_is_singlebyte) ? special_case_tokens (token) : -1;
+ if (result >= 0)
+ return result;
+
+#if defined (ALIAS)
+ /* Posix.2 does not allow reserved words to be aliased, so check for all
+ of them, including special cases, before expanding the current token
+ as an alias. */
+ if MBTEST(posixly_correct)
+ CHECK_FOR_RESERVED_WORD (token);
+
+ /* Aliases are expanded iff EXPAND_ALIASES is non-zero, and quoting
+ inhibits alias expansion. */
+ if (expand_aliases && quoted == 0)
+ {
+ result = alias_expand_token (token);
+ if (result == RE_READ_TOKEN)
+ return (RE_READ_TOKEN);
+ else if (result == NO_EXPANSION)
+ parser_state &= ~PST_ALEXPNEXT;
+ }
+
+ /* If not in Posix.2 mode, check for reserved words after alias
+ expansion. */
+ if MBTEST(posixly_correct == 0)
+#endif
+ CHECK_FOR_RESERVED_WORD (token);
+
+ the_word = (WORD_DESC *)xmalloc (sizeof (WORD_DESC));
+ the_word->word = (char *)xmalloc (1 + token_index);
+ the_word->flags = 0;
+ strcpy (the_word->word, token);
+ if (dollar_present)
+ the_word->flags |= W_HASDOLLAR;
+ if (quoted)
+ the_word->flags |= W_QUOTED; /*(*/
+ if (compound_assignment && token[token_index-1] == ')')
+ the_word->flags |= W_COMPASSIGN;
+ /* A word is an assignment if it appears at the beginning of a
+ simple command, or after another assignment word. This is
+ context-dependent, so it cannot be handled in the grammar. */
+ if (assignment (token, (parser_state & PST_COMPASSIGN) != 0))
+ {
+ the_word->flags |= W_ASSIGNMENT;
+ /* Don't perform word splitting on assignment statements. */
+ if (assignment_acceptable (last_read_token) || (parser_state & PST_COMPASSIGN) != 0)
+ {
+ the_word->flags |= W_NOSPLIT;
+ if (parser_state & PST_COMPASSIGN)
+ the_word->flags |= W_NOGLOB; /* XXX - W_NOBRACE? */
+ }
+ }
+
+ if (command_token_position (last_read_token))
+ {
+ struct builtin *b;
+ b = builtin_address_internal (token, 0);
+ if (b && (b->flags & ASSIGNMENT_BUILTIN))
+ parser_state |= PST_ASSIGNOK;
+ else if (STREQ (token, "eval") || STREQ (token, "let"))
+ parser_state |= PST_ASSIGNOK;
+ }
+
+ yylval.word = the_word;
+
+ if (token[0] == '{' && token[token_index-1] == '}' &&
+ (character == '<' || character == '>'))
+ {
+ /* can use token; already copied to the_word */
+ token[token_index-1] = '\0';
+#if defined (ARRAY_VARS)
+ if (legal_identifier (token+1) || valid_array_reference (token+1))
+#else
+ if (legal_identifier (token+1))
+#endif
+ {
+ strcpy (the_word->word, token+1);
+/*itrace("read_token_word: returning REDIR_WORD for %s", the_word->word);*/
+ return (REDIR_WORD);
+ }
+ }
+
+ result = ((the_word->flags & (W_ASSIGNMENT|W_NOSPLIT)) == (W_ASSIGNMENT|W_NOSPLIT))
+ ? ASSIGNMENT_WORD : WORD;
+
+ switch (last_read_token)
+ {
+ case FUNCTION:
+ parser_state |= PST_ALLOWOPNBRC;
+ function_dstart = line_number;
+ break;
+ case CASE:
+ case SELECT:
+ case FOR:
+ if (word_top < MAX_CASE_NEST)
+ word_top++;
+ word_lineno[word_top] = line_number;
+ break;
+ }
+
+ return (result);
+}
+
+/* Return 1 if TOKSYM is a token that after being read would allow
+ a reserved word to be seen, else 0. */
+static int
+reserved_word_acceptable (toksym)
+ int toksym;
+{
+ switch (toksym)
+ {
+ case '\n':
+ case ';':
+ case '(':
+ case ')':
+ case '|':
+ case '&':
+ case '{':
+ case '}': /* XXX */
+ case AND_AND:
+ case BANG:
+ case BAR_AND:
+ case DO:
+ case DONE:
+ case ELIF:
+ case ELSE:
+ case ESAC:
+ case FI:
+ case IF:
+ case OR_OR:
+ case SEMI_SEMI:
+ case SEMI_AND:
+ case SEMI_SEMI_AND:
+ case THEN:
+ case TIME:
+ case TIMEOPT:
+ case TIMEIGN:
+ case COPROC:
+ case UNTIL:
+ case WHILE:
+ case 0:
+ return 1;
+ default:
+#if defined (COPROCESS_SUPPORT)
+ if (last_read_token == WORD && token_before_that == COPROC)
+ return 1;
+#endif
+ if (last_read_token == WORD && token_before_that == FUNCTION)
+ return 1;
+ return 0;
+ }
+}
+
+/* Return the index of TOKEN in the alist of reserved words, or -1 if
+ TOKEN is not a shell reserved word. */
+int
+find_reserved_word (tokstr)
+ char *tokstr;
+{
+ int i;
+ for (i = 0; word_token_alist[i].word; i++)
+ if (STREQ (tokstr, word_token_alist[i].word))
+ return i;
+ return -1;
+}
+
+/* An interface to let the rest of the shell (primarily the completion
+ system) know what the parser is expecting. */
+int
+parser_in_command_position ()
+{
+ return (command_token_position (last_read_token));
+}
+
+#if 0
+#if defined (READLINE)
+/* Called after each time readline is called. This insures that whatever
+ the new prompt string is gets propagated to readline's local prompt
+ variable. */
+static void
+reset_readline_prompt ()
+{
+ char *temp_prompt;
+
+ if (prompt_string_pointer)
+ {
+ temp_prompt = (*prompt_string_pointer)
+ ? decode_prompt_string (*prompt_string_pointer)
+ : (char *)NULL;
+
+ if (temp_prompt == 0)
+ {
+ temp_prompt = (char *)xmalloc (1);
+ temp_prompt[0] = '\0';
+ }
+
+ FREE (current_readline_prompt);
+ current_readline_prompt = temp_prompt;
+ }
+}
+#endif /* READLINE */
+#endif /* 0 */
+
+#if defined (HISTORY)
+/* A list of tokens which can be followed by newlines, but not by
+ semi-colons. When concatenating multiple lines of history, the
+ newline separator for such tokens is replaced with a space. */
+static const int no_semi_successors[] = {
+ '\n', '{', '(', ')', ';', '&', '|',
+ CASE, DO, ELSE, IF, SEMI_SEMI, SEMI_AND, SEMI_SEMI_AND, THEN, UNTIL,
+ WHILE, AND_AND, OR_OR, IN,
+ 0
+};
+
+/* If we are not within a delimited expression, try to be smart
+ about which separators can be semi-colons and which must be
+ newlines. Returns the string that should be added into the
+ history entry. LINE is the line we're about to add; it helps
+ make some more intelligent decisions in certain cases. */
+char *
+history_delimiting_chars (line)
+ const char *line;
+{
+ static int last_was_heredoc = 0; /* was the last entry the start of a here document? */
+ register int i;
+
+ if ((parser_state & PST_HEREDOC) == 0)
+ last_was_heredoc = 0;
+
+ if (dstack.delimiter_depth != 0)
+ return ("\n");
+
+ /* We look for current_command_line_count == 2 because we are looking to
+ add the first line of the body of the here document (the second line
+ of the command). We also keep LAST_WAS_HEREDOC as a private sentinel
+ variable to note when we think we added the first line of a here doc
+ (the one with a "<<" somewhere in it) */
+ if (parser_state & PST_HEREDOC)
+ {
+ if (last_was_heredoc)
+ {
+ last_was_heredoc = 0;
+ return "\n";
+ }
+ return (current_command_line_count == 2 ? "\n" : "");
+ }
+
+ if (parser_state & PST_COMPASSIGN)
+ return (" ");
+
+ /* First, handle some special cases. */
+ /*(*/
+ /* If we just read `()', assume it's a function definition, and don't
+ add a semicolon. If the token before the `)' was not `(', and we're
+ not in the midst of parsing a case statement, assume it's a
+ parenthesized command and add the semicolon. */
+ /*)(*/
+ if (token_before_that == ')')
+ {
+ if (two_tokens_ago == '(') /*)*/ /* function def */
+ return " ";
+ /* This does not work for subshells inside case statement
+ command lists. It's a suboptimal solution. */
+ else if (parser_state & PST_CASESTMT) /* case statement pattern */
+ return " ";
+ else
+ return "; "; /* (...) subshell */
+ }
+ else if (token_before_that == WORD && two_tokens_ago == FUNCTION)
+ return " "; /* function def using `function name' without `()' */
+
+ /* If we're not in a here document, but we think we're about to parse one,
+ and we would otherwise return a `;', return a newline to delimit the
+ line with the here-doc delimiter */
+ else if ((parser_state & PST_HEREDOC) == 0 && current_command_line_count > 1 && last_read_token == '\n' && strstr (line, "<<"))
+ {
+ last_was_heredoc = 1;
+ return "\n";
+ }
+
+ else if (token_before_that == WORD && two_tokens_ago == FOR)
+ {
+ /* Tricky. `for i\nin ...' should not have a semicolon, but
+ `for i\ndo ...' should. We do what we can. */
+ for (i = shell_input_line_index; whitespace (shell_input_line[i]); i++)
+ ;
+ if (shell_input_line[i] && shell_input_line[i] == 'i' && shell_input_line[i+1] == 'n')
+ return " ";
+ return ";";
+ }
+ else if (two_tokens_ago == CASE && token_before_that == WORD && (parser_state & PST_CASESTMT))
+ return " ";
+
+ for (i = 0; no_semi_successors[i]; i++)
+ {
+ if (token_before_that == no_semi_successors[i])
+ return (" ");
+ }
+
+ return ("; ");
+}
+#endif /* HISTORY */
+
+/* Issue a prompt, or prepare to issue a prompt when the next character
+ is read. */
+static void
+prompt_again ()
+{
+ char *temp_prompt;
+
+ if (interactive == 0 || expanding_alias ()) /* XXX */
+ return;
+
+ ps1_prompt = get_string_value ("PS1");
+ ps2_prompt = get_string_value ("PS2");
+
+ if (!prompt_string_pointer)
+ prompt_string_pointer = &ps1_prompt;
+
+ temp_prompt = *prompt_string_pointer
+ ? decode_prompt_string (*prompt_string_pointer)
+ : (char *)NULL;
+
+ if (temp_prompt == 0)
+ {
+ temp_prompt = (char *)xmalloc (1);
+ temp_prompt[0] = '\0';
+ }
+
+ current_prompt_string = *prompt_string_pointer;
+ prompt_string_pointer = &ps2_prompt;
+
+#if defined (READLINE)
+ if (!no_line_editing)
+ {
+ FREE (current_readline_prompt);
+ current_readline_prompt = temp_prompt;
+ }
+ else
+#endif /* READLINE */
+ {
+ FREE (current_decoded_prompt);
+ current_decoded_prompt = temp_prompt;
+ }
+}
+
+int
+get_current_prompt_level ()
+{
+ return ((current_prompt_string && current_prompt_string == ps2_prompt) ? 2 : 1);
+}
+
+void
+set_current_prompt_level (x)
+ int x;
+{
+ prompt_string_pointer = (x == 2) ? &ps2_prompt : &ps1_prompt;
+ current_prompt_string = *prompt_string_pointer;
+}
+
+static void
+print_prompt ()
+{
+ fprintf (stderr, "%s", current_decoded_prompt);
+ fflush (stderr);
+}
+
+/* Return a string which will be printed as a prompt. The string
+ may contain special characters which are decoded as follows:
+
+ \a bell (ascii 07)
+ \d the date in Day Mon Date format
+ \e escape (ascii 033)
+ \h the hostname up to the first `.'
+ \H the hostname
+ \j the number of active jobs
+ \l the basename of the shell's tty device name
+ \n CRLF
+ \r CR
+ \s the name of the shell
+ \t the time in 24-hour hh:mm:ss format
+ \T the time in 12-hour hh:mm:ss format
+ \@ the time in 12-hour hh:mm am/pm format
+ \A the time in 24-hour hh:mm format
+ \D{fmt} the result of passing FMT to strftime(3)
+ \u your username
+ \v the version of bash (e.g., 2.00)
+ \V the release of bash, version + patchlevel (e.g., 2.00.0)
+ \w the current working directory
+ \W the last element of $PWD
+ \! the history number of this command
+ \# the command number of this command
+ \$ a $ or a # if you are root
+ \nnn character code nnn in octal
+ \\ a backslash
+ \[ begin a sequence of non-printing chars
+ \] end a sequence of non-printing chars
+*/
+#define PROMPT_GROWTH 48
+char *
+decode_prompt_string (string)
+ char *string;
+{
+ WORD_LIST *list;
+ char *result, *t;
+ struct dstack save_dstack;
+ int last_exit_value, last_comsub_pid;
+#if defined (PROMPT_STRING_DECODE)
+ int result_size, result_index;
+ int c, n, i;
+ char *temp, octal_string[4];
+ struct tm *tm;
+ time_t the_time;
+ char timebuf[128];
+ char *timefmt;
+
+ result = (char *)xmalloc (result_size = PROMPT_GROWTH);
+ result[result_index = 0] = 0;
+ temp = (char *)NULL;
+
+ while (c = *string++)
+ {
+ if (posixly_correct && c == '!')
+ {
+ if (*string == '!')
+ {
+ temp = savestring ("!");
+ goto add_string;
+ }
+ else
+ {
+#if !defined (HISTORY)
+ temp = savestring ("1");
+#else /* HISTORY */
+ temp = itos (history_number ());
+#endif /* HISTORY */
+ string--; /* add_string increments string again. */
+ goto add_string;
+ }
+ }
+ if (c == '\\')
+ {
+ c = *string;
+
+ switch (c)
+ {
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ strncpy (octal_string, string, 3);
+ octal_string[3] = '\0';
+
+ n = read_octal (octal_string);
+ temp = (char *)xmalloc (3);
+
+ if (n == CTLESC || n == CTLNUL)
+ {
+ temp[0] = CTLESC;
+ temp[1] = n;
+ temp[2] = '\0';
+ }
+ else if (n == -1)
+ {
+ temp[0] = '\\';
+ temp[1] = '\0';
+ }
+ else
+ {
+ temp[0] = n;
+ temp[1] = '\0';
+ }
+
+ for (c = 0; n != -1 && c < 3 && ISOCTAL (*string); c++)
+ string++;
+
+ c = 0; /* tested at add_string: */
+ goto add_string;
+
+ case 'd':
+ case 't':
+ case 'T':
+ case '@':
+ case 'A':
+ /* Make the current time/date into a string. */
+ (void) time (&the_time);
+#if defined (HAVE_TZSET)
+ sv_tz ("TZ"); /* XXX -- just make sure */
+#endif
+ tm = localtime (&the_time);
+
+ if (c == 'd')
+ n = strftime (timebuf, sizeof (timebuf), "%a %b %d", tm);
+ else if (c == 't')
+ n = strftime (timebuf, sizeof (timebuf), "%H:%M:%S", tm);
+ else if (c == 'T')
+ n = strftime (timebuf, sizeof (timebuf), "%I:%M:%S", tm);
+ else if (c == '@')
+ n = strftime (timebuf, sizeof (timebuf), "%I:%M %p", tm);
+ else if (c == 'A')
+ n = strftime (timebuf, sizeof (timebuf), "%H:%M", tm);
+
+ if (n == 0)
+ timebuf[0] = '\0';
+ else
+ timebuf[sizeof(timebuf) - 1] = '\0';
+
+ temp = savestring (timebuf);
+ goto add_string;
+
+ case 'D': /* strftime format */
+ if (string[1] != '{') /* } */
+ goto not_escape;
+
+ (void) time (&the_time);
+ tm = localtime (&the_time);
+ string += 2; /* skip { */
+ timefmt = xmalloc (strlen (string) + 3);
+ for (t = timefmt; *string && *string != '}'; )
+ *t++ = *string++;
+ *t = '\0';
+ c = *string; /* tested at add_string */
+ if (timefmt[0] == '\0')
+ {
+ timefmt[0] = '%';
+ timefmt[1] = 'X'; /* locale-specific current time */
+ timefmt[2] = '\0';
+ }
+ n = strftime (timebuf, sizeof (timebuf), timefmt, tm);
+ free (timefmt);
+
+ if (n == 0)
+ timebuf[0] = '\0';
+ else
+ timebuf[sizeof(timebuf) - 1] = '\0';
+
+ if (promptvars || posixly_correct)
+ /* Make sure that expand_prompt_string is called with a
+ second argument of Q_DOUBLE_QUOTES if we use this
+ function here. */
+ temp = sh_backslash_quote_for_double_quotes (timebuf);
+ else
+ temp = savestring (timebuf);
+ goto add_string;
+
+ case 'n':
+ temp = (char *)xmalloc (3);
+ temp[0] = no_line_editing ? '\n' : '\r';
+ temp[1] = no_line_editing ? '\0' : '\n';
+ temp[2] = '\0';
+ goto add_string;
+
+ case 's':
+ temp = base_pathname (shell_name);
+ temp = savestring (temp);
+ goto add_string;
+
+ case 'v':
+ case 'V':
+ temp = (char *)xmalloc (16);
+ if (c == 'v')
+ strcpy (temp, dist_version);
+ else
+ sprintf (temp, "%s.%d", dist_version, patch_level);
+ goto add_string;
+
+ case 'w':
+ case 'W':
+ {
+ /* Use the value of PWD because it is much more efficient. */
+ char t_string[PATH_MAX];
+ int tlen;
+
+ temp = get_string_value ("PWD");
+
+ if (temp == 0)
+ {
+ if (getcwd (t_string, sizeof(t_string)) == 0)
+ {
+ t_string[0] = '.';
+ tlen = 1;
+ }
+ else
+ tlen = strlen (t_string);
+ }
+ else
+ {
+ tlen = sizeof (t_string) - 1;
+ strncpy (t_string, temp, tlen);
+ }
+ t_string[tlen] = '\0';
+
+#if defined (MACOSX)
+ /* Convert from "fs" format to "input" format */
+ temp = fnx_fromfs (t_string, strlen (t_string));
+ if (temp != t_string)
+ strcpy (t_string, temp);
+#endif
+
+#define ROOT_PATH(x) ((x)[0] == '/' && (x)[1] == 0)
+#define DOUBLE_SLASH_ROOT(x) ((x)[0] == '/' && (x)[1] == '/' && (x)[2] == 0)
+ /* Abbreviate \W as ~ if $PWD == $HOME */
+ if (c == 'W' && (((t = get_string_value ("HOME")) == 0) || STREQ (t, t_string) == 0))
+ {
+ if (ROOT_PATH (t_string) == 0 && DOUBLE_SLASH_ROOT (t_string) == 0)
+ {
+ t = strrchr (t_string, '/');
+ if (t)
+ memmove (t_string, t + 1, strlen (t)); /* strlen(t) to copy NULL */
+ }
+ }
+#undef ROOT_PATH
+#undef DOUBLE_SLASH_ROOT
+ else
+ {
+ /* polite_directory_format is guaranteed to return a string
+ no longer than PATH_MAX - 1 characters. */
+ temp = polite_directory_format (t_string);
+ if (temp != t_string)
+ strcpy (t_string, temp);
+ }
+
+ temp = trim_pathname (t_string, PATH_MAX - 1);
+ /* If we're going to be expanding the prompt string later,
+ quote the directory name. */
+ if (promptvars || posixly_correct)
+ /* Make sure that expand_prompt_string is called with a
+ second argument of Q_DOUBLE_QUOTES if we use this
+ function here. */
+ temp = sh_backslash_quote_for_double_quotes (t_string);
+ else
+ temp = savestring (t_string);
+
+ goto add_string;
+ }
+
+ case 'u':
+ if (current_user.user_name == 0)
+ get_current_user_info ();
+ temp = savestring (current_user.user_name);
+ goto add_string;
+
+ case 'h':
+ case 'H':
+ temp = savestring (current_host_name);
+ if (c == 'h' && (t = (char *)strchr (temp, '.')))
+ *t = '\0';
+ goto add_string;
+
+ case '#':
+ temp = itos (current_command_number);
+ goto add_string;
+
+ case '!':
+#if !defined (HISTORY)
+ temp = savestring ("1");
+#else /* HISTORY */
+ temp = itos (history_number ());
+#endif /* HISTORY */
+ goto add_string;
+
+ case '$':
+ t = temp = (char *)xmalloc (3);
+ if ((promptvars || posixly_correct) && (current_user.euid != 0))
+ *t++ = '\\';
+ *t++ = current_user.euid == 0 ? '#' : '$';
+ *t = '\0';
+ goto add_string;
+
+ case 'j':
+ temp = itos (count_all_jobs ());
+ goto add_string;
+
+ case 'l':
+#if defined (HAVE_TTYNAME)
+ temp = (char *)ttyname (fileno (stdin));
+ t = temp ? base_pathname (temp) : "tty";
+ temp = savestring (t);
+#else
+ temp = savestring ("tty");
+#endif /* !HAVE_TTYNAME */
+ goto add_string;
+
+#if defined (READLINE)
+ case '[':
+ case ']':
+ if (no_line_editing)
+ {
+ string++;
+ break;
+ }
+ temp = (char *)xmalloc (3);
+ n = (c == '[') ? RL_PROMPT_START_IGNORE : RL_PROMPT_END_IGNORE;
+ i = 0;
+ if (n == CTLESC || n == CTLNUL)
+ temp[i++] = CTLESC;
+ temp[i++] = n;
+ temp[i] = '\0';
+ goto add_string;
+#endif /* READLINE */
+
+ case '\\':
+ case 'a':
+ case 'e':
+ case 'r':
+ temp = (char *)xmalloc (2);
+ if (c == 'a')
+ temp[0] = '\07';
+ else if (c == 'e')
+ temp[0] = '\033';
+ else if (c == 'r')
+ temp[0] = '\r';
+ else /* (c == '\\') */
+ temp[0] = c;
+ temp[1] = '\0';
+ goto add_string;
+
+ default:
+not_escape:
+ temp = (char *)xmalloc (3);
+ temp[0] = '\\';
+ temp[1] = c;
+ temp[2] = '\0';
+
+ add_string:
+ if (c)
+ string++;
+ result =
+ sub_append_string (temp, result, &result_index, &result_size);
+ temp = (char *)NULL; /* Freed in sub_append_string (). */
+ result[result_index] = '\0';
+ break;
+ }
+ }
+ else
+ {
+ RESIZE_MALLOCED_BUFFER (result, result_index, 3, result_size, PROMPT_GROWTH);
+ result[result_index++] = c;
+ result[result_index] = '\0';
+ }
+ }
+#else /* !PROMPT_STRING_DECODE */
+ result = savestring (string);
+#endif /* !PROMPT_STRING_DECODE */
+
+ /* Save the delimiter stack and point `dstack' to temp space so any
+ command substitutions in the prompt string won't result in screwing
+ up the parser's quoting state. */
+ save_dstack = dstack;
+ dstack = temp_dstack;
+ dstack.delimiter_depth = 0;
+
+ /* Perform variable and parameter expansion and command substitution on
+ the prompt string. */
+ if (promptvars || posixly_correct)
+ {
+ last_exit_value = last_command_exit_value;
+ last_comsub_pid = last_command_subst_pid;
+ list = expand_prompt_string (result, Q_DOUBLE_QUOTES, 0);
+ free (result);
+ result = string_list (list);
+ dispose_words (list);
+ last_command_exit_value = last_exit_value;
+ last_command_subst_pid = last_comsub_pid;
+ }
+ else
+ {
+ t = dequote_string (result);
+ free (result);
+ result = t;
+ }
+
+ dstack = save_dstack;
+
+ return (result);
+}
+
+/************************************************
+ * *
+ * ERROR HANDLING *
+ * *
+ ************************************************/
+
+/* Report a syntax error, and restart the parser. Call here for fatal
+ errors. */
+int
+yyerror (msg)
+ const char *msg;
+{
+ report_syntax_error ((char *)NULL);
+ reset_parser ();
+ return (0);
+}
+
+static char *
+error_token_from_token (tok)
+ int tok;
+{
+ char *t;
+
+ if (t = find_token_in_alist (tok, word_token_alist, 0))
+ return t;
+
+ if (t = find_token_in_alist (tok, other_token_alist, 0))
+ return t;
+
+ t = (char *)NULL;
+ /* This stuff is dicy and needs closer inspection */
+ switch (current_token)
+ {
+ case WORD:
+ case ASSIGNMENT_WORD:
+ if (yylval.word)
+ t = savestring (yylval.word->word);
+ break;
+ case NUMBER:
+ t = itos (yylval.number);
+ break;
+ case ARITH_CMD:
+ if (yylval.word_list)
+ t = string_list (yylval.word_list);
+ break;
+ case ARITH_FOR_EXPRS:
+ if (yylval.word_list)
+ t = string_list_internal (yylval.word_list, " ; ");
+ break;
+ case COND_CMD:
+ t = (char *)NULL; /* punt */
+ break;
+ }
+
+ return t;
+}
+
+static char *
+error_token_from_text ()
+{
+ char *msg, *t;
+ int token_end, i;
+
+ t = shell_input_line;
+ i = shell_input_line_index;
+ token_end = 0;
+ msg = (char *)NULL;
+
+ if (i && t[i] == '\0')
+ i--;
+
+ while (i && (whitespace (t[i]) || t[i] == '\n'))
+ i--;
+
+ if (i)
+ token_end = i + 1;
+
+ while (i && (member (t[i], " \n\t;|&") == 0))
+ i--;
+
+ while (i != token_end && (whitespace (t[i]) || t[i] == '\n'))
+ i++;
+
+ /* Return our idea of the offending token. */
+ if (token_end || (i == 0 && token_end == 0))
+ {
+ if (token_end)
+ msg = substring (t, i, token_end);
+ else /* one-character token */
+ {
+ msg = (char *)xmalloc (2);
+ msg[0] = t[i];
+ msg[1] = '\0';
+ }
+ }
+
+ return (msg);
+}
+
+static void
+print_offending_line ()
+{
+ char *msg;
+ int token_end;
+
+ msg = savestring (shell_input_line);
+ token_end = strlen (msg);
+ while (token_end && msg[token_end - 1] == '\n')
+ msg[--token_end] = '\0';
+
+ parser_error (line_number, "`%s'", msg);
+ free (msg);
+}
+
+/* Report a syntax error with line numbers, etc.
+ Call here for recoverable errors. If you have a message to print,
+ then place it in MESSAGE, otherwise pass NULL and this will figure
+ out an appropriate message for you. */
+static void
+report_syntax_error (message)
+ char *message;
+{
+ char *msg, *p;
+
+ if (message)
+ {
+ parser_error (line_number, "%s", message);
+ if (interactive && EOF_Reached)
+ EOF_Reached = 0;
+ last_command_exit_value = parse_and_execute_level ? EX_BADSYNTAX : EX_BADUSAGE;
+ return;
+ }
+
+ /* If the line of input we're reading is not null, try to find the
+ objectionable token. First, try to figure out what token the
+ parser's complaining about by looking at current_token. */
+ if (current_token != 0 && EOF_Reached == 0 && (msg = error_token_from_token (current_token)))
+ {
+ if (ansic_shouldquote (msg))
+ {
+ p = ansic_quote (msg, 0, NULL);
+ free (msg);
+ msg = p;
+ }
+ parser_error (line_number, _("syntax error near unexpected token `%s'"), msg);
+ free (msg);
+
+ if (interactive == 0)
+ print_offending_line ();
+
+ last_command_exit_value = parse_and_execute_level ? EX_BADSYNTAX : EX_BADUSAGE;
+ return;
+ }
+
+ /* If looking at the current token doesn't prove fruitful, try to find the
+ offending token by analyzing the text of the input line near the current
+ input line index and report what we find. */
+ if (shell_input_line && *shell_input_line)
+ {
+ msg = error_token_from_text ();
+ if (msg)
+ {
+ parser_error (line_number, _("syntax error near `%s'"), msg);
+ free (msg);
+ }
+
+ /* If not interactive, print the line containing the error. */
+ if (interactive == 0)
+ print_offending_line ();
+ }
+ else
+ {
+ msg = EOF_Reached ? _("syntax error: unexpected end of file") : _("syntax error");
+ parser_error (line_number, "%s", msg);
+ /* When the shell is interactive, this file uses EOF_Reached
+ only for error reporting. Other mechanisms are used to
+ decide whether or not to exit. */
+ if (interactive && EOF_Reached)
+ EOF_Reached = 0;
+ }
+
+ last_command_exit_value = parse_and_execute_level ? EX_BADSYNTAX : EX_BADUSAGE;
+}
+
+/* ??? Needed function. ??? We have to be able to discard the constructs
+ created during parsing. In the case of error, we want to return
+ allocated objects to the memory pool. In the case of no error, we want
+ to throw away the information about where the allocated objects live.
+ (dispose_command () will actually free the command.) */
+static void
+discard_parser_constructs (error_p)
+ int error_p;
+{
+}
+
+/************************************************
+ * *
+ * EOF HANDLING *
+ * *
+ ************************************************/
+
+/* Do that silly `type "bye" to exit' stuff. You know, "ignoreeof". */
+
+/* A flag denoting whether or not ignoreeof is set. */
+int ignoreeof = 0;
+
+/* The number of times that we have encountered an EOF character without
+ another character intervening. When this gets above the limit, the
+ shell terminates. */
+int eof_encountered = 0;
+
+/* The limit for eof_encountered. */
+int eof_encountered_limit = 10;
+
+/* If we have EOF as the only input unit, this user wants to leave
+ the shell. If the shell is not interactive, then just leave.
+ Otherwise, if ignoreeof is set, and we haven't done this the
+ required number of times in a row, print a message. */
+static void
+handle_eof_input_unit ()
+{
+ if (interactive)
+ {
+ /* shell.c may use this to decide whether or not to write out the
+ history, among other things. We use it only for error reporting
+ in this file. */
+ if (EOF_Reached)
+ EOF_Reached = 0;
+
+ /* If the user wants to "ignore" eof, then let her do so, kind of. */
+ if (ignoreeof)
+ {
+ if (eof_encountered < eof_encountered_limit)
+ {
+ fprintf (stderr, _("Use \"%s\" to leave the shell.\n"),
+ login_shell ? "logout" : "exit");
+ eof_encountered++;
+ /* Reset the parsing state. */
+ last_read_token = current_token = '\n';
+ /* Reset the prompt string to be $PS1. */
+ prompt_string_pointer = (char **)NULL;
+ prompt_again ();
+ return;
+ }
+ }
+
+ /* In this case EOF should exit the shell. Do it now. */
+ reset_parser ();
+ exit_builtin ((WORD_LIST *)NULL);
+ }
+ else
+ {
+ /* We don't write history files, etc., for non-interactive shells. */
+ EOF_Reached = 1;
+ }
+}
+
+/************************************************
+ * *
+ * STRING PARSING FUNCTIONS *
+ * *
+ ************************************************/
+
+/* It's very important that these two functions treat the characters
+ between ( and ) identically. */
+
+static WORD_LIST parse_string_error;
+
+/* Take a string and run it through the shell parser, returning the
+ resultant word list. Used by compound array assignment. */
+WORD_LIST *
+parse_string_to_word_list (s, flags, whom)
+ char *s;
+ int flags;
+ const char *whom;
+{
+ WORD_LIST *wl;
+ int tok, orig_current_token, orig_line_number, orig_input_terminator;
+ int orig_line_count;
+ int old_echo_input, old_expand_aliases;
+#if defined (HISTORY)
+ int old_remember_on_history, old_history_expansion_inhibited;
+#endif
+
+#if defined (HISTORY)
+ old_remember_on_history = remember_on_history;
+# if defined (BANG_HISTORY)
+ old_history_expansion_inhibited = history_expansion_inhibited;
+# endif
+ bash_history_disable ();
+#endif
+
+ orig_line_number = line_number;
+ orig_line_count = current_command_line_count;
+ orig_input_terminator = shell_input_line_terminator;
+ old_echo_input = echo_input_at_read;
+ old_expand_aliases = expand_aliases;
+
+ push_stream (1);
+ last_read_token = WORD; /* WORD to allow reserved words here */
+ current_command_line_count = 0;
+ echo_input_at_read = expand_aliases = 0;
+
+ with_input_from_string (s, whom);
+ wl = (WORD_LIST *)NULL;
+
+ if (flags & 1)
+ parser_state |= PST_COMPASSIGN|PST_REPARSE;
+
+ while ((tok = read_token (READ)) != yacc_EOF)
+ {
+ if (tok == '\n' && *bash_input.location.string == '\0')
+ break;
+ if (tok == '\n') /* Allow newlines in compound assignments */
+ continue;
+ if (tok != WORD && tok != ASSIGNMENT_WORD)
+ {
+ line_number = orig_line_number + line_number - 1;
+ orig_current_token = current_token;
+ current_token = tok;
+ yyerror (NULL); /* does the right thing */
+ current_token = orig_current_token;
+ if (wl)
+ dispose_words (wl);
+ wl = &parse_string_error;
+ break;
+ }
+ wl = make_word_list (yylval.word, wl);
+ }
+
+ last_read_token = '\n';
+ pop_stream ();
+
+#if defined (HISTORY)
+ remember_on_history = old_remember_on_history;
+# if defined (BANG_HISTORY)
+ history_expansion_inhibited = old_history_expansion_inhibited;
+# endif /* BANG_HISTORY */
+#endif /* HISTORY */
+
+ echo_input_at_read = old_echo_input;
+ expand_aliases = old_expand_aliases;
+
+ current_command_line_count = orig_line_count;
+ shell_input_line_terminator = orig_input_terminator;
+
+ if (flags & 1)
+ parser_state &= ~(PST_COMPASSIGN|PST_REPARSE);
+
+ if (wl == &parse_string_error)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ if (interactive_shell == 0 && posixly_correct)
+ jump_to_top_level (FORCE_EOF);
+ else
+ jump_to_top_level (DISCARD);
+ }
+
+ return (REVERSE_LIST (wl, WORD_LIST *));
+}
+
+static char *
+parse_compound_assignment (retlenp)
+ int *retlenp;
+{
+ WORD_LIST *wl, *rl;
+ int tok, orig_line_number, orig_token_size, orig_last_token, assignok;
+ char *saved_token, *ret;
+
+ saved_token = token;
+ orig_token_size = token_buffer_size;
+ orig_line_number = line_number;
+ orig_last_token = last_read_token;
+
+ last_read_token = WORD; /* WORD to allow reserved words here */
+
+ token = (char *)NULL;
+ token_buffer_size = 0;
+
+ assignok = parser_state&PST_ASSIGNOK; /* XXX */
+
+ wl = (WORD_LIST *)NULL; /* ( */
+ parser_state |= PST_COMPASSIGN;
+
+ while ((tok = read_token (READ)) != ')')
+ {
+ if (tok == '\n') /* Allow newlines in compound assignments */
+ {
+ if (SHOULD_PROMPT ())
+ prompt_again ();
+ continue;
+ }
+ if (tok != WORD && tok != ASSIGNMENT_WORD)
+ {
+ current_token = tok; /* for error reporting */
+ if (tok == yacc_EOF) /* ( */
+ parser_error (orig_line_number, _("unexpected EOF while looking for matching `)'"));
+ else
+ yyerror(NULL); /* does the right thing */
+ if (wl)
+ dispose_words (wl);
+ wl = &parse_string_error;
+ break;
+ }
+ wl = make_word_list (yylval.word, wl);
+ }
+
+ FREE (token);
+ token = saved_token;
+ token_buffer_size = orig_token_size;
+
+ parser_state &= ~PST_COMPASSIGN;
+
+ if (wl == &parse_string_error)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ last_read_token = '\n'; /* XXX */
+ if (interactive_shell == 0 && posixly_correct)
+ jump_to_top_level (FORCE_EOF);
+ else
+ jump_to_top_level (DISCARD);
+ }
+
+ last_read_token = orig_last_token; /* XXX - was WORD? */
+
+ if (wl)
+ {
+ rl = REVERSE_LIST (wl, WORD_LIST *);
+ ret = string_list (rl);
+ dispose_words (rl);
+ }
+ else
+ ret = (char *)NULL;
+
+ if (retlenp)
+ *retlenp = (ret && *ret) ? strlen (ret) : 0;
+
+ if (assignok)
+ parser_state |= PST_ASSIGNOK;
+
+ return ret;
+}
+
+/************************************************
+ * *
+ * SAVING AND RESTORING PARTIAL PARSE STATE *
+ * *
+ ************************************************/
+
+sh_parser_state_t *
+save_parser_state (ps)
+ sh_parser_state_t *ps;
+{
+ if (ps == 0)
+ ps = (sh_parser_state_t *)xmalloc (sizeof (sh_parser_state_t));
+ if (ps == 0)
+ return ((sh_parser_state_t *)NULL);
+
+ ps->parser_state = parser_state;
+ ps->token_state = save_token_state ();
+
+ ps->input_line_terminator = shell_input_line_terminator;
+ ps->eof_encountered = eof_encountered;
+
+ ps->prompt_string_pointer = prompt_string_pointer;
+
+ ps->current_command_line_count = current_command_line_count;
+
+#if defined (HISTORY)
+ ps->remember_on_history = remember_on_history;
+# if defined (BANG_HISTORY)
+ ps->history_expansion_inhibited = history_expansion_inhibited;
+# endif
+#endif
+
+ ps->last_command_exit_value = last_command_exit_value;
+#if defined (ARRAY_VARS)
+ ps->pipestatus = save_pipestatus_array ();
+#endif
+
+ ps->last_shell_builtin = last_shell_builtin;
+ ps->this_shell_builtin = this_shell_builtin;
+
+ ps->expand_aliases = expand_aliases;
+ ps->echo_input_at_read = echo_input_at_read;
+
+ ps->token = token;
+ ps->token_buffer_size = token_buffer_size;
+ /* Force reallocation on next call to read_token_word */
+ token = 0;
+ token_buffer_size = 0;
+
+ return (ps);
+}
+
+void
+restore_parser_state (ps)
+ sh_parser_state_t *ps;
+{
+ if (ps == 0)
+ return;
+
+ parser_state = ps->parser_state;
+ if (ps->token_state)
+ {
+ restore_token_state (ps->token_state);
+ free (ps->token_state);
+ }
+
+ shell_input_line_terminator = ps->input_line_terminator;
+ eof_encountered = ps->eof_encountered;
+
+ prompt_string_pointer = ps->prompt_string_pointer;
+
+ current_command_line_count = ps->current_command_line_count;
+
+#if defined (HISTORY)
+ remember_on_history = ps->remember_on_history;
+# if defined (BANG_HISTORY)
+ history_expansion_inhibited = ps->history_expansion_inhibited;
+# endif
+#endif
+
+ last_command_exit_value = ps->last_command_exit_value;
+#if defined (ARRAY_VARS)
+ restore_pipestatus_array (ps->pipestatus);
+#endif
+
+ last_shell_builtin = ps->last_shell_builtin;
+ this_shell_builtin = ps->this_shell_builtin;
+
+ expand_aliases = ps->expand_aliases;
+ echo_input_at_read = ps->echo_input_at_read;
+
+ FREE (token);
+ token = ps->token;
+ token_buffer_size = ps->token_buffer_size;
+}
+
+sh_input_line_state_t *
+save_input_line_state (ls)
+ sh_input_line_state_t *ls;
+{
+ if (ls == 0)
+ ls = (sh_input_line_state_t *)xmalloc (sizeof (sh_input_line_state_t));
+ if (ls == 0)
+ return ((sh_input_line_state_t *)NULL);
+
+ ls->input_line = shell_input_line;
+ ls->input_line_size = shell_input_line_size;
+ ls->input_line_len = shell_input_line_len;
+ ls->input_line_index = shell_input_line_index;
+
+ /* force reallocation */
+ shell_input_line = 0;
+ shell_input_line_size = shell_input_line_len = shell_input_line_index = 0;
+
+ return ls;
+}
+
+void
+restore_input_line_state (ls)
+ sh_input_line_state_t *ls;
+{
+ FREE (shell_input_line);
+ shell_input_line = ls->input_line;
+ shell_input_line_size = ls->input_line_size;
+ shell_input_line_len = ls->input_line_len;
+ shell_input_line_index = ls->input_line_index;
+
+ set_line_mbstate ();
+}
+
+/************************************************
+ * *
+ * MULTIBYTE CHARACTER HANDLING *
+ * *
+ ************************************************/
+
+#if defined (HANDLE_MULTIBYTE)
+static void
+set_line_mbstate ()
+{
+ int c;
+ size_t i, previ, len;
+ mbstate_t mbs, prevs;
+ size_t mbclen;
+
+ if (shell_input_line == NULL)
+ return;
+ len = strlen (shell_input_line); /* XXX - shell_input_line_len ? */
+ FREE (shell_input_line_property);
+ shell_input_line_property = (char *)xmalloc (len + 1);
+
+ memset (&prevs, '\0', sizeof (mbstate_t));
+ for (i = previ = 0; i < len; i++)
+ {
+ mbs = prevs;
+
+ c = shell_input_line[i];
+ if (c == EOF)
+ {
+ size_t j;
+ for (j = i; j < len; j++)
+ shell_input_line_property[j] = 1;
+ break;
+ }
+
+ mbclen = mbrlen (shell_input_line + previ, i - previ + 1, &mbs);
+ if (mbclen == 1 || mbclen == (size_t)-1)
+ {
+ mbclen = 1;
+ previ = i + 1;
+ }
+ else if (mbclen == (size_t)-2)
+ mbclen = 0;
+ else if (mbclen > 1)
+ {
+ mbclen = 0;
+ previ = i + 1;
+ prevs = mbs;
+ }
+ else
+ {
+ /* XXX - what to do if mbrlen returns 0? (null wide character) */
+ size_t j;
+ for (j = i; j < len; j++)
+ shell_input_line_property[j] = 1;
+ break;
+ }
+
+ shell_input_line_property[i] = mbclen;
+ }
+}
+#endif /* HANDLE_MULTIBYTE */
COMPSPEC *pcomp_curcs;
const char *pcomp_curcmd;
+const char *pcomp_curtxt;
#ifdef DEBUG
/* Debugging code */
quoted strings. */
dfn = (*rl_filename_dequoting_function) ((char *)text, rl_completion_quote_character);
}
+ /* Intended to solve a mismatched assumption by bash-completion. If
+ the text to be completed is empty, but bash-completion turns it into
+ a quoted string ('') assuming that this code will dequote it before
+ calling readline, do the dequoting. */
+ else if (iscompgen && iscompleting &&
+ pcomp_curtxt && *pcomp_curtxt == 0 &&
+ text && (*text == '\'' || *text == '"') && text[1] == text[0] && text[2] == 0 &&
+ rl_filename_dequoting_function)
+ dfn = (*rl_filename_dequoting_function) ((char *)text, rl_completion_quote_character);
else
dfn = savestring (text);
}
COMPSPEC **lastcs;
{
COMPSPEC *cs, *oldcs;
- const char *oldcmd;
+ const char *oldcmd, *oldtxt;
STRINGLIST *ret;
cs = progcomp_search (ocmd);
oldcs = pcomp_curcs;
oldcmd = pcomp_curcmd;
+ oldtxt = pcomp_curtxt;
pcomp_curcs = cs;
pcomp_curcmd = cmd;
+ pcomp_curtxt = word;
ret = gen_compspec_completions (cs, cmd, word, start, end, foundp);
pcomp_curcs = oldcs;
pcomp_curcmd = oldcmd;
+ pcomp_curtxt = oldtxt;
/* We need to conditionally handle setting *retryp here */
if (retryp)
--- /dev/null
+:; ./shx
+
+sh:
+<&$fd ok
+nlbq Mon Aug 3 02:45:00 EDT 1992
+bang geoff
+quote 712824302
+setbq defmsgid=<1992Aug3.024502.6176@host>
+bgwait sleep done... wait 6187
+
+
+bash:
+<&$fd ok
+nlbq Mon Aug 3 02:45:09 EDT 1992
+bang geoff
+quote 712824311
+setbq defmsgid=<1992Aug3.024512.6212@host>
+bgwait sleep done... wait 6223
+
+
+ash:
+<&$fd shx1: 4: Syntax error: Bad fd number
+nlbq Mon Aug 3 02:45:19 EDT 1992
+bang geoff
+quote getdate: `"now"' not a valid date
+
+setbq defmsgid=<1992Aug3.` echo 024521
+bgwait sleep done... wait 6241
+
+
+ksh:
+<&$fd ok
+nlbq ./shx: 6248 Memory fault - core dumped
+bang geoff
+quote getdate: `"now"' not a valid date
+
+setbq defmsgid=<1992Aug3.024530.6257@host>
+bgwait no such job: 6265
+wait 6265
+sleep done...
+
+zsh:
+<&$fd ok
+nlbq Mon Aug 3 02:45:36 EDT 1992
+bang shx3: event not found: /s/ [4]
+quote 712824337
+setbq defmsgid=<..6290@host>
+bgwait shx7: unmatched " [9]
+sleep done...
+:;
--- /dev/null
+#! /bin/sh
+for cmd in sh bash ash ksh zsh
+do
+ echo
+ echo $cmd:
+ for demo in shx?
+ do
+ $cmd $demo
+ done
+done
extern int sigalrm_seen;
extern procenv_t alrmbuf;
+extern volatile int from_return_trap;
+
extern char *this_command_name;
extern sh_builtin_func_t *this_shell_builtin;
extern procenv_t wait_intr_buf;
#if defined (ARRAY_VARS)
restore_pipestatus_array (ps);
#endif
- running_trap = 0;
+ running_trap = 0;
sigmodes[sig] &= ~SIG_INPROGRESS;
if (sigmodes[sig] & SIG_CHANGED)
return_catch_value = trap_exit_value;
COPY_PROCENV (save_return_catch, return_catch);
if (function_code)
- longjmp (return_catch, 1);
+ {
+#if 0
+ from_return_trap = sig == RETURN_TRAP;
+#endif
+ longjmp (return_catch, 1);
+ }
}
}
--- /dev/null
+/* trap.c -- Not the trap command, but useful functions for manipulating
+ those objects. The trap command is in builtins/trap.def. */
+
+/* Copyright (C) 1987-2013 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 (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
+#include "bashtypes.h"
+#include "bashansi.h"
+
+#include <stdio.h>
+#include <errno.h>
+
+#include "bashintl.h"
+
+#include <signal.h>
+
+#include "trap.h"
+
+#include "shell.h"
+#include "flags.h"
+#include "input.h" /* for save_token_state, restore_token_state */
+#include "jobs.h"
+#include "signames.h"
+#include "builtins.h"
+#include "builtins/common.h"
+#include "builtins/builtext.h"
+
+#if defined (READLINE)
+# include <readline/readline.h>
+# include "bashline.h"
+#endif
+
+#ifndef errno
+extern int errno;
+#endif
+
+/* Flags which describe the current handling state of a signal. */
+#define SIG_INHERITED 0x0 /* Value inherited from parent. */
+#define SIG_TRAPPED 0x1 /* Currently trapped. */
+#define SIG_HARD_IGNORE 0x2 /* Signal was ignored on shell entry. */
+#define SIG_SPECIAL 0x4 /* Treat this signal specially. */
+#define SIG_NO_TRAP 0x8 /* Signal cannot be trapped. */
+#define SIG_INPROGRESS 0x10 /* Signal handler currently executing. */
+#define SIG_CHANGED 0x20 /* Trap value changed in trap handler. */
+#define SIG_IGNORED 0x40 /* The signal is currently being ignored. */
+
+#define SPECIAL_TRAP(s) ((s) == EXIT_TRAP || (s) == DEBUG_TRAP || (s) == ERROR_TRAP || (s) == RETURN_TRAP)
+
+/* An array of such flags, one for each signal, describing what the
+ shell will do with a signal. DEBUG_TRAP == NSIG; some code below
+ assumes this. */
+static int sigmodes[BASH_NSIG];
+
+static void free_trap_command __P((int));
+static void change_signal __P((int, char *));
+
+static int _run_trap_internal __P((int, char *));
+
+static void free_trap_string __P((int));
+static void reset_signal __P((int));
+static void restore_signal __P((int));
+static void reset_or_restore_signal_handlers __P((sh_resetsig_func_t *));
+
+/* Variables used here but defined in other files. */
+extern int last_command_exit_value;
+extern int line_number;
+
+extern int sigalrm_seen;
+extern procenv_t alrmbuf;
+
+extern volatile int from_return_trap;
+
+extern char *this_command_name;
+extern sh_builtin_func_t *this_shell_builtin;
+extern procenv_t wait_intr_buf;
+extern int return_catch_flag, return_catch_value;
+extern int subshell_level;
+extern WORD_LIST *subst_assign_varlist;
+
+/* The list of things to do originally, before we started trapping. */
+SigHandler *original_signals[NSIG];
+
+/* For each signal, a slot for a string, which is a command to be
+ executed when that signal is received. The slot can also contain
+ DEFAULT_SIG, which means do whatever you were going to do before
+ you were so rudely interrupted, or IGNORE_SIG, which says ignore
+ this signal. */
+char *trap_list[BASH_NSIG];
+
+/* A bitmap of signals received for which we have trap handlers. */
+int pending_traps[NSIG];
+
+/* Set to the number of the signal we're running the trap for + 1.
+ Used in execute_cmd.c and builtins/common.c to clean up when
+ parse_and_execute does not return normally after executing the
+ trap command (e.g., when `return' is executed in the trap command). */
+int running_trap;
+
+/* Set to last_command_exit_value before running a trap. */
+int trap_saved_exit_value;
+
+/* The (trapped) signal received while executing in the `wait' builtin */
+int wait_signal_received;
+
+int trapped_signal_received;
+
+#define GETORIGSIG(sig) \
+ do { \
+ original_signals[sig] = (SigHandler *)set_signal_handler (sig, SIG_DFL); \
+ set_signal_handler (sig, original_signals[sig]); \
+ if (original_signals[sig] == SIG_IGN) \
+ sigmodes[sig] |= SIG_HARD_IGNORE; \
+ } while (0)
+
+#define SETORIGSIG(sig,handler) \
+ do { \
+ original_signals[sig] = handler; \
+ if (original_signals[sig] == SIG_IGN) \
+ sigmodes[sig] |= SIG_HARD_IGNORE; \
+ } while (0)
+
+#define GET_ORIGINAL_SIGNAL(sig) \
+ if (sig && sig < NSIG && original_signals[sig] == IMPOSSIBLE_TRAP_HANDLER) \
+ GETORIGSIG(sig)
+
+void
+initialize_traps ()
+{
+ register int i;
+
+ initialize_signames();
+
+ trap_list[EXIT_TRAP] = trap_list[DEBUG_TRAP] = trap_list[ERROR_TRAP] = trap_list[RETURN_TRAP] = (char *)NULL;
+ sigmodes[EXIT_TRAP] = sigmodes[DEBUG_TRAP] = sigmodes[ERROR_TRAP] = sigmodes[RETURN_TRAP] = SIG_INHERITED;
+ original_signals[EXIT_TRAP] = IMPOSSIBLE_TRAP_HANDLER;
+
+ for (i = 1; i < NSIG; i++)
+ {
+ pending_traps[i] = 0;
+ trap_list[i] = (char *)DEFAULT_SIG;
+ sigmodes[i] = SIG_INHERITED; /* XXX - only set, not used */
+ original_signals[i] = IMPOSSIBLE_TRAP_HANDLER;
+ }
+
+ /* Show which signals are treated specially by the shell. */
+#if defined (SIGCHLD)
+ GETORIGSIG (SIGCHLD);
+ sigmodes[SIGCHLD] |= (SIG_SPECIAL | SIG_NO_TRAP);
+#endif /* SIGCHLD */
+
+ GETORIGSIG (SIGINT);
+ sigmodes[SIGINT] |= SIG_SPECIAL;
+
+#if defined (__BEOS__)
+ /* BeOS sets SIGINT to SIG_IGN! */
+ original_signals[SIGINT] = SIG_DFL;
+ sigmodes[SIGINT] &= ~SIG_HARD_IGNORE;
+#endif
+
+ GETORIGSIG (SIGQUIT);
+ sigmodes[SIGQUIT] |= SIG_SPECIAL;
+
+ if (interactive)
+ {
+ GETORIGSIG (SIGTERM);
+ sigmodes[SIGTERM] |= SIG_SPECIAL;
+ }
+}
+
+#ifdef DEBUG
+/* Return a printable representation of the trap handler for SIG. */
+static char *
+trap_handler_string (sig)
+ int sig;
+{
+ if (trap_list[sig] == (char *)DEFAULT_SIG)
+ return "DEFAULT_SIG";
+ else if (trap_list[sig] == (char *)IGNORE_SIG)
+ return "IGNORE_SIG";
+ else if (trap_list[sig] == (char *)IMPOSSIBLE_TRAP_HANDLER)
+ return "IMPOSSIBLE_TRAP_HANDLER";
+ else if (trap_list[sig])
+ return trap_list[sig];
+ else
+ return "NULL";
+}
+#endif
+
+/* Return the print name of this signal. */
+char *
+signal_name (sig)
+ int sig;
+{
+ char *ret;
+
+ /* on cygwin32, signal_names[sig] could be null */
+ ret = (sig >= BASH_NSIG || sig < 0 || signal_names[sig] == NULL)
+ ? _("invalid signal number")
+ : signal_names[sig];
+
+ return ret;
+}
+
+/* Turn a string into a signal number, or a number into
+ a signal number. If STRING is "2", "SIGINT", or "INT",
+ then (int)2 is returned. Return NO_SIG if STRING doesn't
+ contain a valid signal descriptor. */
+int
+decode_signal (string, flags)
+ char *string;
+ int flags;
+{
+ intmax_t sig;
+ char *name;
+
+ if (legal_number (string, &sig))
+ return ((sig >= 0 && sig < NSIG) ? (int)sig : NO_SIG);
+
+ /* A leading `SIG' may be omitted. */
+ for (sig = 0; sig < BASH_NSIG; sig++)
+ {
+ name = signal_names[sig];
+ if (name == 0 || name[0] == '\0')
+ continue;
+
+ /* Check name without the SIG prefix first case sensitively or
+ insensitively depending on whether flags includes DSIG_NOCASE */
+ if (STREQN (name, "SIG", 3))
+ {
+ name += 3;
+
+ if ((flags & DSIG_NOCASE) && strcasecmp (string, name) == 0)
+ return ((int)sig);
+ else if ((flags & DSIG_NOCASE) == 0 && strcmp (string, name) == 0)
+ return ((int)sig);
+ /* If we can't use the `SIG' prefix to match, punt on this
+ name now. */
+ else if ((flags & DSIG_SIGPREFIX) == 0)
+ continue;
+ }
+
+ /* Check name with SIG prefix case sensitively or insensitively
+ depending on whether flags includes DSIG_NOCASE */
+ name = signal_names[sig];
+ if ((flags & DSIG_NOCASE) && strcasecmp (string, name) == 0)
+ return ((int)sig);
+ else if ((flags & DSIG_NOCASE) == 0 && strcmp (string, name) == 0)
+ return ((int)sig);
+ }
+
+ return (NO_SIG);
+}
+
+/* Non-zero when we catch a trapped signal. */
+static int catch_flag;
+
+void
+run_pending_traps ()
+{
+ register int sig;
+ int old_exit_value;
+ WORD_LIST *save_subst_varlist;
+ sh_parser_state_t pstate;
+#if defined (ARRAY_VARS)
+ ARRAY *ps;
+#endif
+
+ if (catch_flag == 0) /* simple optimization */
+ return;
+
+ if (running_trap > 0)
+ {
+#if defined (DEBUG)
+ internal_warning ("run_pending_traps: recursive invocation while running trap for signal %d", running_trap-1);
+#endif
+#if 0
+ return; /* no recursive trap invocations */
+#else
+ ;
+#endif
+ }
+
+ catch_flag = trapped_signal_received = 0;
+
+ /* Preserve $? when running trap. */
+ old_exit_value = last_command_exit_value;
+#if defined (ARRAY_VARS)
+ ps = save_pipestatus_array ();
+#endif
+
+ for (sig = 1; sig < NSIG; sig++)
+ {
+ /* XXX this could be made into a counter by using
+ while (pending_traps[sig]--) instead of the if statement. */
+ if (pending_traps[sig])
+ {
+ if (running_trap == sig+1)
+ /*continue*/;
+
+ running_trap = sig + 1;
+
+ if (sig == SIGINT)
+ {
+ pending_traps[sig] = 0; /* XXX */
+ run_interrupt_trap ();
+ CLRINTERRUPT;
+ }
+#if defined (JOB_CONTROL) && defined (SIGCHLD)
+ else if (sig == SIGCHLD &&
+ trap_list[SIGCHLD] != (char *)IMPOSSIBLE_TRAP_HANDLER &&
+ (sigmodes[SIGCHLD] & SIG_INPROGRESS) == 0)
+ {
+ sigmodes[SIGCHLD] |= SIG_INPROGRESS;
+ run_sigchld_trap (pending_traps[sig]); /* use as counter */
+ sigmodes[SIGCHLD] &= ~SIG_INPROGRESS;
+ }
+ else if (sig == SIGCHLD &&
+ trap_list[SIGCHLD] == (char *)IMPOSSIBLE_TRAP_HANDLER &&
+ (sigmodes[SIGCHLD] & SIG_INPROGRESS) != 0)
+ {
+ /* This can happen when run_pending_traps is called while
+ running a SIGCHLD trap handler. */
+ running_trap = 0;
+ /* want to leave pending_traps[SIGCHLD] alone here */
+ continue; /* XXX */
+ }
+ else if (sig == SIGCHLD && (sigmodes[SIGCHLD] & SIG_INPROGRESS))
+ {
+ /* whoops -- print warning? */
+ running_trap = 0; /* XXX */
+ /* want to leave pending_traps[SIGCHLD] alone here */
+ continue;
+ }
+#endif
+ else if (trap_list[sig] == (char *)DEFAULT_SIG ||
+ trap_list[sig] == (char *)IGNORE_SIG ||
+ trap_list[sig] == (char *)IMPOSSIBLE_TRAP_HANDLER)
+ {
+ /* This is possible due to a race condition. Say a bash
+ process has SIGTERM trapped. A subshell is spawned
+ using { list; } & and the parent does something and kills
+ the subshell with SIGTERM. It's possible for the subshell
+ to set pending_traps[SIGTERM] to 1 before the code in
+ execute_cmd.c eventually calls restore_original_signals
+ to reset the SIGTERM signal handler in the subshell. The
+ next time run_pending_traps is called, pending_traps[SIGTERM]
+ will be 1, but the trap handler in trap_list[SIGTERM] will
+ be invalid (probably DEFAULT_SIG, but it could be IGNORE_SIG).
+ Unless we catch this, the subshell will dump core when
+ trap_list[SIGTERM] == DEFAULT_SIG, because DEFAULT_SIG is
+ usually 0x0. */
+ internal_warning (_("run_pending_traps: bad value in trap_list[%d]: %p"),
+ sig, trap_list[sig]);
+ if (trap_list[sig] == (char *)DEFAULT_SIG)
+ {
+ internal_warning (_("run_pending_traps: signal handler is SIG_DFL, resending %d (%s) to myself"), sig, signal_name (sig));
+ kill (getpid (), sig);
+ }
+ }
+ else
+ {
+ /* XXX - should we use save_parser_state/restore_parser_state? */
+ save_parser_state (&pstate);
+ save_subst_varlist = subst_assign_varlist;
+ subst_assign_varlist = 0;
+
+#if defined (JOB_CONTROL)
+ save_pipeline (1); /* XXX only provides one save level */
+#endif
+ /* XXX - set pending_traps[sig] = 0 here? */
+ pending_traps[sig] = 0;
+ evalstring (savestring (trap_list[sig]), "trap", SEVAL_NONINT|SEVAL_NOHIST|SEVAL_RESETLINE);
+#if defined (JOB_CONTROL)
+ restore_pipeline (1);
+#endif
+
+ subst_assign_varlist = save_subst_varlist;
+ restore_parser_state (&pstate);
+ }
+
+ pending_traps[sig] = 0; /* XXX - move before evalstring? */
+ running_trap = 0;
+ }
+ }
+
+#if defined (ARRAY_VARS)
+ restore_pipestatus_array (ps);
+#endif
+ last_command_exit_value = old_exit_value;
+}
+
+sighandler
+trap_handler (sig)
+ int sig;
+{
+ int oerrno;
+
+ if ((sigmodes[sig] & SIG_TRAPPED) == 0)
+ {
+#if defined (DEBUG)
+ internal_warning ("trap_handler: signal %d: signal not trapped", sig);
+#endif
+ SIGRETURN (0);
+ }
+
+ if ((sig >= NSIG) ||
+ (trap_list[sig] == (char *)DEFAULT_SIG) ||
+ (trap_list[sig] == (char *)IGNORE_SIG))
+ programming_error (_("trap_handler: bad signal %d"), sig);
+ else
+ {
+ oerrno = errno;
+#if defined (MUST_REINSTALL_SIGHANDLERS)
+# if defined (JOB_CONTROL) && defined (SIGCHLD)
+ if (sig != SIGCHLD)
+# endif /* JOB_CONTROL && SIGCHLD */
+ set_signal_handler (sig, trap_handler);
+#endif /* MUST_REINSTALL_SIGHANDLERS */
+
+ catch_flag = 1;
+ pending_traps[sig]++;
+
+ trapped_signal_received = sig;
+
+ if (this_shell_builtin && (this_shell_builtin == wait_builtin))
+ {
+ wait_signal_received = sig;
+ if (interrupt_immediately)
+ longjmp (wait_intr_buf, 1);
+ }
+
+#if defined (READLINE)
+ /* Set the event hook so readline will call it after the signal handlers
+ finish executing, so if this interrupted character input we can get
+ quick response. */
+ if (RL_ISSTATE (RL_STATE_SIGHANDLER) && interrupt_immediately == 0)
+ bashline_set_event_hook ();
+#endif
+
+ if (interrupt_immediately)
+ run_pending_traps ();
+
+ errno = oerrno;
+ }
+
+ SIGRETURN (0);
+}
+
+int
+first_pending_trap ()
+{
+ register int i;
+
+ for (i = 1; i < NSIG; i++)
+ if (pending_traps[i])
+ return i;
+ return -1;
+}
+
+int
+any_signals_trapped ()
+{
+ register int i;
+
+ for (i = 1; i < NSIG; i++)
+ if (sigmodes[i] & SIG_TRAPPED)
+ return i;
+ return -1;
+}
+
+void
+check_signals ()
+{
+ CHECK_ALRM; /* set by the read builtin */
+ QUIT;
+}
+
+/* Convenience functions the rest of the shell can use */
+void
+check_signals_and_traps ()
+{
+ check_signals ();
+
+ run_pending_traps ();
+}
+
+#if defined (JOB_CONTROL) && defined (SIGCHLD)
+
+#ifdef INCLUDE_UNUSED
+/* Make COMMAND_STRING be executed when SIGCHLD is caught. */
+void
+set_sigchld_trap (command_string)
+ char *command_string;
+{
+ set_signal (SIGCHLD, command_string);
+}
+#endif
+
+/* Make COMMAND_STRING be executed when SIGCHLD is caught iff SIGCHLD
+ is not already trapped. IMPOSSIBLE_TRAP_HANDLER is used as a sentinel
+ to make sure that a SIGCHLD trap handler run via run_sigchld_trap can
+ reset the disposition to the default and not have the original signal
+ accidentally restored, undoing the user's command. */
+void
+maybe_set_sigchld_trap (command_string)
+ char *command_string;
+{
+ if ((sigmodes[SIGCHLD] & SIG_TRAPPED) == 0 && trap_list[SIGCHLD] == (char *)IMPOSSIBLE_TRAP_HANDLER)
+ set_signal (SIGCHLD, command_string);
+}
+
+/* Temporarily set the SIGCHLD trap string to IMPOSSIBLE_TRAP_HANDLER. Used
+ as a sentinel in run_sigchld_trap and maybe_set_sigchld_trap to see whether
+ or not a SIGCHLD trap handler reset SIGCHLD disposition to the default. */
+void
+set_impossible_sigchld_trap ()
+{
+ restore_default_signal (SIGCHLD);
+ change_signal (SIGCHLD, (char *)IMPOSSIBLE_TRAP_HANDLER);
+ sigmodes[SIGCHLD] &= ~SIG_TRAPPED; /* maybe_set_sigchld_trap checks this */
+}
+
+/* Act as if we received SIGCHLD NCHILD times and increment
+ pending_traps[SIGCHLD] by that amount. This allows us to still run the
+ SIGCHLD trap once for each exited child. */
+void
+queue_sigchld_trap (nchild)
+ int nchild;
+{
+ if (nchild > 0)
+ {
+ catch_flag = 1;
+ pending_traps[SIGCHLD] += nchild;
+ trapped_signal_received = SIGCHLD;
+ }
+}
+#endif /* JOB_CONTROL && SIGCHLD */
+
+void
+set_debug_trap (command)
+ char *command;
+{
+ set_signal (DEBUG_TRAP, command);
+}
+
+void
+set_error_trap (command)
+ char *command;
+{
+ set_signal (ERROR_TRAP, command);
+}
+
+void
+set_return_trap (command)
+ char *command;
+{
+ set_signal (RETURN_TRAP, command);
+}
+
+#ifdef INCLUDE_UNUSED
+void
+set_sigint_trap (command)
+ char *command;
+{
+ set_signal (SIGINT, command);
+}
+#endif
+
+/* Reset the SIGINT handler so that subshells that are doing `shellsy'
+ things, like waiting for command substitution or executing commands
+ in explicit subshells ( ( cmd ) ), can catch interrupts properly. */
+SigHandler *
+set_sigint_handler ()
+{
+ if (sigmodes[SIGINT] & SIG_HARD_IGNORE)
+ return ((SigHandler *)SIG_IGN);
+
+ else if (sigmodes[SIGINT] & SIG_IGNORED)
+ return ((SigHandler *)set_signal_handler (SIGINT, SIG_IGN)); /* XXX */
+
+ else if (sigmodes[SIGINT] & SIG_TRAPPED)
+ return ((SigHandler *)set_signal_handler (SIGINT, trap_handler));
+
+ /* The signal is not trapped, so set the handler to the shell's special
+ interrupt handler. */
+ else if (interactive) /* XXX - was interactive_shell */
+ return (set_signal_handler (SIGINT, sigint_sighandler));
+ else
+ return (set_signal_handler (SIGINT, termsig_sighandler));
+}
+
+/* Return the correct handler for signal SIG according to the values in
+ sigmodes[SIG]. */
+SigHandler *
+trap_to_sighandler (sig)
+ int sig;
+{
+ if (sigmodes[sig] & (SIG_IGNORED|SIG_HARD_IGNORE))
+ return (SIG_IGN);
+ else if (sigmodes[sig] & SIG_TRAPPED)
+ return (trap_handler);
+ else
+ return (SIG_DFL);
+}
+
+/* Set SIG to call STRING as a command. */
+void
+set_signal (sig, string)
+ int sig;
+ char *string;
+{
+ sigset_t set, oset;
+
+ if (SPECIAL_TRAP (sig))
+ {
+ change_signal (sig, savestring (string));
+ if (sig == EXIT_TRAP && interactive == 0)
+ initialize_terminating_signals ();
+ return;
+ }
+
+ /* A signal ignored on entry to the shell cannot be trapped or reset, but
+ no error is reported when attempting to do so. -- Posix.2 */
+ if (sigmodes[sig] & SIG_HARD_IGNORE)
+ return;
+
+ /* Make sure we have original_signals[sig] if the signal has not yet
+ been trapped. */
+ if ((sigmodes[sig] & SIG_TRAPPED) == 0)
+ {
+ /* If we aren't sure of the original value, check it. */
+ if (original_signals[sig] == IMPOSSIBLE_TRAP_HANDLER)
+ GETORIGSIG (sig);
+ if (original_signals[sig] == SIG_IGN)
+ return;
+ }
+
+ /* Only change the system signal handler if SIG_NO_TRAP is not set.
+ The trap command string is changed in either case. The shell signal
+ handlers for SIGINT and SIGCHLD run the user specified traps in an
+ environment in which it is safe to do so. */
+ if ((sigmodes[sig] & SIG_NO_TRAP) == 0)
+ {
+ BLOCK_SIGNAL (sig, set, oset);
+ change_signal (sig, savestring (string));
+ set_signal_handler (sig, trap_handler);
+ UNBLOCK_SIGNAL (oset);
+ }
+ else
+ change_signal (sig, savestring (string));
+}
+
+static void
+free_trap_command (sig)
+ int sig;
+{
+ if ((sigmodes[sig] & SIG_TRAPPED) && trap_list[sig] &&
+ (trap_list[sig] != (char *)IGNORE_SIG) &&
+ (trap_list[sig] != (char *)DEFAULT_SIG) &&
+ (trap_list[sig] != (char *)IMPOSSIBLE_TRAP_HANDLER))
+ free (trap_list[sig]);
+}
+
+/* If SIG has a string assigned to it, get rid of it. Then give it
+ VALUE. */
+static void
+change_signal (sig, value)
+ int sig;
+ char *value;
+{
+ if ((sigmodes[sig] & SIG_INPROGRESS) == 0)
+ free_trap_command (sig);
+ trap_list[sig] = value;
+
+ sigmodes[sig] |= SIG_TRAPPED;
+ if (value == (char *)IGNORE_SIG)
+ sigmodes[sig] |= SIG_IGNORED;
+ else
+ sigmodes[sig] &= ~SIG_IGNORED;
+ if (sigmodes[sig] & SIG_INPROGRESS)
+ sigmodes[sig] |= SIG_CHANGED;
+}
+
+void
+get_original_signal (sig)
+ int sig;
+{
+ /* If we aren't sure the of the original value, then get it. */
+ if (sig > 0 && sig < NSIG && original_signals[sig] == (SigHandler *)IMPOSSIBLE_TRAP_HANDLER)
+ GETORIGSIG (sig);
+}
+
+void
+get_all_original_signals ()
+{
+ register int i;
+
+ for (i = 1; i < NSIG; i++)
+ GET_ORIGINAL_SIGNAL (i);
+}
+
+void
+set_original_signal (sig, handler)
+ int sig;
+ SigHandler *handler;
+{
+ if (sig > 0 && sig < NSIG && original_signals[sig] == (SigHandler *)IMPOSSIBLE_TRAP_HANDLER)
+ SETORIGSIG (sig, handler);
+}
+
+/* Restore the default action for SIG; i.e., the action the shell
+ would have taken before you used the trap command. This is called
+ from trap_builtin (), which takes care to restore the handlers for
+ the signals the shell treats specially. */
+void
+restore_default_signal (sig)
+ int sig;
+{
+ if (SPECIAL_TRAP (sig))
+ {
+ if ((sig != DEBUG_TRAP && sig != ERROR_TRAP && sig != RETURN_TRAP) ||
+ (sigmodes[sig] & SIG_INPROGRESS) == 0)
+ free_trap_command (sig);
+ trap_list[sig] = (char *)NULL;
+ sigmodes[sig] &= ~SIG_TRAPPED;
+ if (sigmodes[sig] & SIG_INPROGRESS)
+ sigmodes[sig] |= SIG_CHANGED;
+ return;
+ }
+
+ GET_ORIGINAL_SIGNAL (sig);
+
+ /* A signal ignored on entry to the shell cannot be trapped or reset, but
+ no error is reported when attempting to do so. Thanks Posix.2. */
+ if (sigmodes[sig] & SIG_HARD_IGNORE)
+ return;
+
+ /* If we aren't trapping this signal, don't bother doing anything else. */
+ /* We special-case SIGCHLD and IMPOSSIBLE_TRAP_HANDLER (see above) as a
+ sentinel to determine whether or not disposition is reset to the default
+ while the trap handler is executing. */
+ if (((sigmodes[sig] & SIG_TRAPPED) == 0) &&
+ (sig != SIGCHLD || (sigmodes[sig] & SIG_INPROGRESS) == 0 || trap_list[sig] != (char *)IMPOSSIBLE_TRAP_HANDLER))
+ return;
+
+ /* Only change the signal handler for SIG if it allows it. */
+ if ((sigmodes[sig] & SIG_NO_TRAP) == 0)
+ set_signal_handler (sig, original_signals[sig]);
+
+ /* Change the trap command in either case. */
+ change_signal (sig, (char *)DEFAULT_SIG);
+
+ /* Mark the signal as no longer trapped. */
+ sigmodes[sig] &= ~SIG_TRAPPED;
+}
+
+/* Make this signal be ignored. */
+void
+ignore_signal (sig)
+ int sig;
+{
+ if (SPECIAL_TRAP (sig) && ((sigmodes[sig] & SIG_IGNORED) == 0))
+ {
+ change_signal (sig, (char *)IGNORE_SIG);
+ return;
+ }
+
+ GET_ORIGINAL_SIGNAL (sig);
+
+ /* A signal ignored on entry to the shell cannot be trapped or reset.
+ No error is reported when the user attempts to do so. */
+ if (sigmodes[sig] & SIG_HARD_IGNORE)
+ return;
+
+ /* If already trapped and ignored, no change necessary. */
+ if (sigmodes[sig] & SIG_IGNORED)
+ return;
+
+ /* Only change the signal handler for SIG if it allows it. */
+ if ((sigmodes[sig] & SIG_NO_TRAP) == 0)
+ set_signal_handler (sig, SIG_IGN);
+
+ /* Change the trap command in either case. */
+ change_signal (sig, (char *)IGNORE_SIG);
+}
+
+/* Handle the calling of "trap 0". The only sticky situation is when
+ the command to be executed includes an "exit". This is why we have
+ to provide our own place for top_level to jump to. */
+int
+run_exit_trap ()
+{
+ char *trap_command;
+ int code, function_code, retval;
+#if defined (ARRAY_VARS)
+ ARRAY *ps;
+#endif
+
+ trap_saved_exit_value = last_command_exit_value;
+#if defined (ARRAY_VARS)
+ ps = save_pipestatus_array ();
+#endif
+ function_code = 0;
+
+ /* Run the trap only if signal 0 is trapped and not ignored, and we are not
+ currently running in the trap handler (call to exit in the list of
+ commands given to trap 0). */
+ if ((sigmodes[EXIT_TRAP] & SIG_TRAPPED) &&
+ (sigmodes[EXIT_TRAP] & (SIG_IGNORED|SIG_INPROGRESS)) == 0)
+ {
+ trap_command = savestring (trap_list[EXIT_TRAP]);
+ sigmodes[EXIT_TRAP] &= ~SIG_TRAPPED;
+ sigmodes[EXIT_TRAP] |= SIG_INPROGRESS;
+
+ retval = trap_saved_exit_value;
+ running_trap = 1;
+
+ code = setjmp_nosigs (top_level);
+
+ /* If we're in a function, make sure return longjmps come here, too. */
+ if (return_catch_flag)
+ function_code = setjmp_nosigs (return_catch);
+
+ if (code == 0 && function_code == 0)
+ {
+ reset_parser ();
+ parse_and_execute (trap_command, "exit trap", SEVAL_NONINT|SEVAL_NOHIST|SEVAL_RESETLINE);
+ }
+ else if (code == ERREXIT)
+ retval = last_command_exit_value;
+ else if (code == EXITPROG)
+ retval = last_command_exit_value;
+ else if (function_code != 0)
+ retval = return_catch_value;
+ else
+ retval = trap_saved_exit_value;
+
+ running_trap = 0;
+ return retval;
+ }
+
+#if defined (ARRAY_VARS)
+ restore_pipestatus_array (ps);
+#endif
+ return (trap_saved_exit_value);
+}
+
+void
+run_trap_cleanup (sig)
+ int sig;
+{
+ sigmodes[sig] &= ~(SIG_INPROGRESS|SIG_CHANGED);
+}
+
+#define RECURSIVE_SIG(s) (SPECIAL_TRAP(s) == 0)
+
+/* Run a trap command for SIG. SIG is one of the signals the shell treats
+ specially. Returns the exit status of the executed trap command list. */
+static int
+_run_trap_internal (sig, tag)
+ int sig;
+ char *tag;
+{
+ char *trap_command, *old_trap;
+ int trap_exit_value, *token_state;
+ volatile int save_return_catch_flag, function_code;
+ int flags;
+ procenv_t save_return_catch;
+ WORD_LIST *save_subst_varlist;
+ sh_parser_state_t pstate;
+#if defined (ARRAY_VARS)
+ ARRAY *ps;
+#endif
+
+ trap_exit_value = function_code = 0;
+ /* Run the trap only if SIG is trapped and not ignored, and we are not
+ currently executing in the trap handler. */
+ if ((sigmodes[sig] & SIG_TRAPPED) && ((sigmodes[sig] & SIG_IGNORED) == 0) &&
+ (trap_list[sig] != (char *)IMPOSSIBLE_TRAP_HANDLER) &&
+#if 0
+ /* Uncomment this to allow some special signals to recursively execute
+ trap handlers. */
+ (RECURSIVE_SIG (sig) || (sigmodes[sig] & SIG_INPROGRESS) == 0))
+#else
+ ((sigmodes[sig] & SIG_INPROGRESS) == 0))
+#endif
+ {
+ old_trap = trap_list[sig];
+ sigmodes[sig] |= SIG_INPROGRESS;
+ sigmodes[sig] &= ~SIG_CHANGED; /* just to be sure */
+ trap_command = savestring (old_trap);
+
+ running_trap = sig + 1;
+
+#if defined (ARRAY_VARS)
+ ps = save_pipestatus_array ();
+#endif
+
+ save_parser_state (&pstate);
+ save_subst_varlist = subst_assign_varlist;
+ subst_assign_varlist = 0;
+
+#if defined (JOB_CONTROL)
+ if (sig != DEBUG_TRAP) /* run_debug_trap does this */
+ save_pipeline (1); /* XXX only provides one save level */
+#endif
+
+ /* If we're in a function, make sure return longjmps come here, too. */
+ save_return_catch_flag = return_catch_flag;
+ if (return_catch_flag)
+ {
+ COPY_PROCENV (return_catch, save_return_catch);
+ function_code = setjmp_nosigs (return_catch);
+ }
+
+ flags = SEVAL_NONINT|SEVAL_NOHIST;
+ if (sig != DEBUG_TRAP && sig != RETURN_TRAP && sig != ERROR_TRAP)
+ flags |= SEVAL_RESETLINE;
+ if (function_code == 0)
+ parse_and_execute (trap_command, tag, flags);
+
+ trap_exit_value = last_command_exit_value;
+
+#if defined (JOB_CONTROL)
+ if (sig != DEBUG_TRAP) /* run_debug_trap does this */
+ restore_pipeline (1);
+#endif
+
+ subst_assign_varlist = save_subst_varlist;
+ restore_parser_state (&pstate);
+
+#if defined (ARRAY_VARS)
+ restore_pipestatus_array (ps);
+#endif
+
+ running_trap = 0;
+ sigmodes[sig] &= ~SIG_INPROGRESS;
+
+ if (sigmodes[sig] & SIG_CHANGED)
+ {
+#if 0
+ /* Special traps like EXIT, DEBUG, RETURN are handled explicitly in
+ the places where they can be changed using unwind-protects. For
+ example, look at execute_cmd.c:execute_function(). */
+ if (SPECIAL_TRAP (sig) == 0)
+#endif
+ free (old_trap);
+ sigmodes[sig] &= ~SIG_CHANGED;
+ }
+
+ if (save_return_catch_flag)
+ {
+ return_catch_flag = save_return_catch_flag;
+ return_catch_value = trap_exit_value;
+ COPY_PROCENV (save_return_catch, return_catch);
+ if (function_code)
+ {
+ from_return_trap = sig == RETURN_TRAP;
+ longjmp (return_catch, 1);
+ }
+ }
+ }
+
+ return trap_exit_value;
+}
+
+int
+run_debug_trap ()
+{
+ int trap_exit_value;
+ pid_t save_pgrp;
+ int save_pipe[2];
+
+ /* XXX - question: should the DEBUG trap inherit the RETURN trap? */
+ trap_exit_value = 0;
+ if ((sigmodes[DEBUG_TRAP] & SIG_TRAPPED) && ((sigmodes[DEBUG_TRAP] & SIG_IGNORED) == 0) && ((sigmodes[DEBUG_TRAP] & SIG_INPROGRESS) == 0))
+ {
+#if defined (JOB_CONTROL)
+ save_pgrp = pipeline_pgrp;
+ pipeline_pgrp = 0;
+ save_pipeline (1);
+# if defined (PGRP_PIPE)
+ save_pgrp_pipe (save_pipe, 1);
+# endif
+ stop_making_children ();
+#endif
+
+ trap_exit_value = _run_trap_internal (DEBUG_TRAP, "debug trap");
+
+#if defined (JOB_CONTROL)
+ pipeline_pgrp = save_pgrp;
+ restore_pipeline (1);
+# if defined (PGRP_PIPE)
+ close_pgrp_pipe ();
+ restore_pgrp_pipe (save_pipe);
+# endif
+ if (pipeline_pgrp > 0)
+ give_terminal_to (pipeline_pgrp, 1);
+ notify_and_cleanup ();
+#endif
+
+#if defined (DEBUGGER)
+ /* If we're in the debugger and the DEBUG trap returns 2 while we're in
+ a function or sourced script, we force a `return'. */
+ if (debugging_mode && trap_exit_value == 2 && return_catch_flag)
+ {
+ return_catch_value = trap_exit_value;
+ longjmp (return_catch, 1);
+ }
+#endif
+ }
+ return trap_exit_value;
+}
+
+void
+run_error_trap ()
+{
+ if ((sigmodes[ERROR_TRAP] & SIG_TRAPPED) && ((sigmodes[ERROR_TRAP] & SIG_IGNORED) == 0) && (sigmodes[ERROR_TRAP] & SIG_INPROGRESS) == 0)
+ _run_trap_internal (ERROR_TRAP, "error trap");
+}
+
+void
+run_return_trap ()
+{
+ int old_exit_value;
+
+#if 0
+ if ((sigmodes[DEBUG_TRAP] & SIG_TRAPPED) && (sigmodes[DEBUG_TRAP] & SIG_INPROGRESS))
+ return;
+#endif
+
+ if ((sigmodes[RETURN_TRAP] & SIG_TRAPPED) && ((sigmodes[RETURN_TRAP] & SIG_IGNORED) == 0) && (sigmodes[RETURN_TRAP] & SIG_INPROGRESS) == 0)
+ {
+ old_exit_value = last_command_exit_value;
+ _run_trap_internal (RETURN_TRAP, "return trap");
+ last_command_exit_value = old_exit_value;
+ }
+}
+
+/* Run a trap set on SIGINT. This is called from throw_to_top_level (), and
+ declared here to localize the trap functions. */
+void
+run_interrupt_trap ()
+{
+ _run_trap_internal (SIGINT, "interrupt trap");
+}
+
+/* Free all the allocated strings in the list of traps and reset the trap
+ values to the default. Intended to be called from subshells that want
+ to complete work done by reset_signal_handlers upon execution of a
+ subsequent `trap' command that changes a signal's disposition. We need
+ to make sure that we duplicate the behavior of
+ reset_or_restore_signal_handlers and not change the disposition of signals
+ that are set to be ignored. */
+void
+free_trap_strings ()
+{
+ register int i;
+
+ for (i = 0; i < BASH_NSIG; i++)
+ {
+ if (trap_list[i] != (char *)IGNORE_SIG)
+ free_trap_string (i);
+ }
+ trap_list[DEBUG_TRAP] = trap_list[EXIT_TRAP] = trap_list[ERROR_TRAP] = trap_list[RETURN_TRAP] = (char *)NULL;
+}
+
+/* Free a trap command string associated with SIG without changing signal
+ disposition. Intended to be called from free_trap_strings() */
+static void
+free_trap_string (sig)
+ int sig;
+{
+ change_signal (sig, (char *)DEFAULT_SIG);
+ sigmodes[sig] &= ~SIG_TRAPPED;
+}
+
+/* Reset the handler for SIG to the original value but leave the trap string
+ in place. */
+static void
+reset_signal (sig)
+ int sig;
+{
+ set_signal_handler (sig, original_signals[sig]);
+ sigmodes[sig] &= ~SIG_TRAPPED;
+}
+
+/* Set the handler signal SIG to the original and free any trap
+ command associated with it. */
+static void
+restore_signal (sig)
+ int sig;
+{
+ set_signal_handler (sig, original_signals[sig]);
+ change_signal (sig, (char *)DEFAULT_SIG);
+ sigmodes[sig] &= ~SIG_TRAPPED;
+}
+
+static void
+reset_or_restore_signal_handlers (reset)
+ sh_resetsig_func_t *reset;
+{
+ register int i;
+
+ /* Take care of the exit trap first */
+ if (sigmodes[EXIT_TRAP] & SIG_TRAPPED)
+ {
+ sigmodes[EXIT_TRAP] &= ~SIG_TRAPPED;
+ if (reset != reset_signal)
+ {
+ free_trap_command (EXIT_TRAP);
+ trap_list[EXIT_TRAP] = (char *)NULL;
+ }
+ }
+
+ for (i = 1; i < NSIG; i++)
+ {
+ if (sigmodes[i] & SIG_TRAPPED)
+ {
+ if (trap_list[i] == (char *)IGNORE_SIG)
+ set_signal_handler (i, SIG_IGN);
+ else
+ (*reset) (i);
+ }
+ else if (sigmodes[i] & SIG_SPECIAL)
+ (*reset) (i);
+ }
+
+ /* Command substitution and other child processes don't inherit the
+ debug, error, or return traps. If we're in the debugger, and the
+ `functrace' or `errtrace' options have been set, then let command
+ substitutions inherit them. Let command substitution inherit the
+ RETURN trap if we're in the debugger and tracing functions. */
+ if (function_trace_mode == 0)
+ {
+ sigmodes[DEBUG_TRAP] &= ~SIG_TRAPPED;
+ sigmodes[RETURN_TRAP] &= ~SIG_TRAPPED;
+ }
+ if (error_trace_mode == 0)
+ sigmodes[ERROR_TRAP] &= ~SIG_TRAPPED;
+}
+
+/* Reset trapped signals to their original values, but don't free the
+ trap strings. Called by the command substitution code and other places
+ that create a "subshell environment". */
+void
+reset_signal_handlers ()
+{
+ reset_or_restore_signal_handlers (reset_signal);
+}
+
+/* Reset all trapped signals to their original values. Signals set to be
+ ignored with trap '' SIGNAL should be ignored, so we make sure that they
+ are. Called by child processes after they are forked. */
+void
+restore_original_signals ()
+{
+ reset_or_restore_signal_handlers (restore_signal);
+}
+
+/* If a trap handler exists for signal SIG, then call it; otherwise just
+ return failure. Returns 1 if it called the trap handler. */
+int
+maybe_call_trap_handler (sig)
+ int sig;
+{
+ /* Call the trap handler for SIG if the signal is trapped and not ignored. */
+ if ((sigmodes[sig] & SIG_TRAPPED) && ((sigmodes[sig] & SIG_IGNORED) == 0))
+ {
+ switch (sig)
+ {
+ case SIGINT:
+ run_interrupt_trap ();
+ break;
+ case EXIT_TRAP:
+ run_exit_trap ();
+ break;
+ case DEBUG_TRAP:
+ run_debug_trap ();
+ break;
+ case ERROR_TRAP:
+ run_error_trap ();
+ break;
+ default:
+ trap_handler (sig);
+ break;
+ }
+ return (1);
+ }
+ else
+ return (0);
+}
+
+int
+signal_is_trapped (sig)
+ int sig;
+{
+ return (sigmodes[sig] & SIG_TRAPPED);
+}
+
+int
+signal_is_pending (sig)
+ int sig;
+{
+ return (pending_traps[sig]);
+}
+
+int
+signal_is_special (sig)
+ int sig;
+{
+ return (sigmodes[sig] & SIG_SPECIAL);
+}
+
+int
+signal_is_ignored (sig)
+ int sig;
+{
+ return (sigmodes[sig] & SIG_IGNORED);
+}
+
+int
+signal_is_hard_ignored (sig)
+ int sig;
+{
+ return (sigmodes[sig] & SIG_HARD_IGNORE);
+}
+
+void
+set_signal_hard_ignored (sig)
+ int sig;
+{
+ sigmodes[sig] |= SIG_HARD_IGNORE;
+ original_signals[sig] = SIG_IGN;
+}
+
+void
+set_signal_ignored (sig)
+ int sig;
+{
+ original_signals[sig] = SIG_IGN;
+}
+
+int
+signal_in_progress (sig)
+ int sig;
+{
+ return (sigmodes[sig] & SIG_INPROGRESS);
+}
projects / thirdparty / bash.git / commitdiff
