- 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
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>
--- /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 $LS_COLORS
+ we need to leave _rl_color_ext_list as NULL after freeing its
+ elements, then turn off _rl_colored_stats. Report and fix from Martin
+ Wesdorp <mwesdorp@casema.nl>
+
+ 12/13
+ -----
+
+lib/readline/parse-colors.c
+ - _rl_parse_colors: if we encounter an unrecognized prefix, throw an
+ error but try to recover and go on to the next specification
+
+variables.c
+ - make_local_variable: for new variables this function creates, set
+ the att_invisible attribute. All callers from declare_internal.
+ Indirectly, this is a fix for bug with `declare -n var; var=foo;'
+ reported by Pierre Gaston <pierre.gaston@gmail.com>
+
+execute_cmd.c
+ - execute_command_internal: make sure last_command_exit_value is set
+ to 0 after any command executed in the background. Fixes bug
+ reported by Martin Kealey <martin@kurahaupo.gen.nz>
tests/nameref4.sub f
tests/nameref5.sub f
tests/nameref6.sub f
+tests/nameref7.sub f
tests/nameref.right f
tests/new-exp.tests f
tests/new-exp1.sub f
}
else
#endif
- var = make_local_variable (name);
+ var = make_local_variable (name); /* sets att_invisible for new vars */
if (var == 0)
{
any_failed++;
--- /dev/null
+This file is declare.def, from which is created declare.c.
+It implements the builtins "declare" and "local" in Bash.
+
+Copyright (C) 1987-2012 Free Software Foundation, Inc.
+
+This file is part of GNU Bash, the Bourne Again SHell.
+
+Bash is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Bash is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Bash. If not, see <http://www.gnu.org/licenses/>.
+
+$PRODUCES declare.c
+
+$BUILTIN declare
+$FUNCTION declare_builtin
+$SHORT_DOC declare [-aAfFgilnrtux] [-p] [name[=value] ...]
+Set variable values and attributes.
+
+Declare variables and give them attributes. If no NAMEs are given,
+display the attributes and values of all variables.
+
+Options:
+ -f restrict action or display to function names and definitions
+ -F restrict display to function names only (plus line number and
+ source file when debugging)
+ -g create global variables when used in a shell function; otherwise
+ ignored
+ -p display the attributes and value of each NAME
+
+Options which set attributes:
+ -a to make NAMEs indexed arrays (if supported)
+ -A to make NAMEs associative arrays (if supported)
+ -i to make NAMEs have the `integer' attribute
+ -l to convert NAMEs to lower case on assignment
+ -n make NAME a reference to the variable named by its value
+ -r to make NAMEs readonly
+ -t to make NAMEs have the `trace' attribute
+ -u to convert NAMEs to upper case on assignment
+ -x to make NAMEs export
+
+Using `+' instead of `-' turns off the given attribute.
+
+Variables with the integer attribute have arithmetic evaluation (see
+the `let' command) performed when the variable is assigned a value.
+
+When used in a function, `declare' makes NAMEs local, as with the `local'
+command. The `-g' option suppresses this behavior.
+
+Exit Status:
+Returns success unless an invalid option is supplied or a variable
+assignment error occurs.
+$END
+
+$BUILTIN typeset
+$FUNCTION declare_builtin
+$SHORT_DOC typeset [-aAfFgilrtux] [-p] name[=value] ...
+Set variable values and attributes.
+
+Obsolete. See `help declare'.
+$END
+
+#include <config.h>
+
+#if defined (HAVE_UNISTD_H)
+# ifdef _MINIX
+# include <sys/types.h>
+# endif
+# include <unistd.h>
+#endif
+
+#include <stdio.h>
+
+#include "../bashansi.h"
+#include "../bashintl.h"
+
+#include "../shell.h"
+#include "common.h"
+#include "builtext.h"
+#include "bashgetopt.h"
+
+extern int array_needs_making;
+extern int posixly_correct;
+
+static int declare_internal __P((register WORD_LIST *, int));
+
+/* Declare or change variable attributes. */
+int
+declare_builtin (list)
+ register WORD_LIST *list;
+{
+ return (declare_internal (list, 0));
+}
+
+$BUILTIN local
+$FUNCTION local_builtin
+$SHORT_DOC local [option] name[=value] ...
+Define local variables.
+
+Create a local variable called NAME, and give it VALUE. OPTION can
+be any option accepted by `declare'.
+
+Local variables can only be used within a function; they are visible
+only to the function where they are defined and its children.
+
+Exit Status:
+Returns success unless an invalid option is supplied, a variable
+assignment error occurs, or the shell is not executing a function.
+$END
+int
+local_builtin (list)
+ register WORD_LIST *list;
+{
+ if (variable_context)
+ return (declare_internal (list, 1));
+ else
+ {
+ builtin_error (_("can only be used in a function"));
+ return (EXECUTION_FAILURE);
+ }
+}
+
+#if defined (ARRAY_VARS)
+# define DECLARE_OPTS "+acfgilnprtuxAF"
+#else
+# define DECLARE_OPTS "+cfgilnprtuxF"
+#endif
+
+/* The workhorse function. */
+static int
+declare_internal (list, local_var)
+ register WORD_LIST *list;
+ int local_var;
+{
+ int flags_on, flags_off, *flags;
+ int any_failed, assign_error, pflag, nodefs, opt, mkglobal, onref, offref;
+ char *t, *subscript_start;
+ SHELL_VAR *var, *v, *refvar;
+ FUNCTION_DEF *shell_fn;
+
+ flags_on = flags_off = any_failed = assign_error = pflag = nodefs = mkglobal = 0;
+ refvar = (SHELL_VAR *)NULL;
+ reset_internal_getopt ();
+ while ((opt = internal_getopt (list, DECLARE_OPTS)) != EOF)
+ {
+ flags = list_opttype == '+' ? &flags_off : &flags_on;
+
+ switch (opt)
+ {
+ case 'a':
+#if defined (ARRAY_VARS)
+ *flags |= att_array;
+ break;
+#else
+ builtin_usage ();
+ return (EX_USAGE);
+#endif
+ case 'A':
+#if defined (ARRAY_VARS)
+ *flags |= att_assoc;
+ break;
+#else
+ builtin_usage ();
+ return (EX_USAGE);
+#endif
+ case 'p':
+ if (local_var == 0)
+ pflag++;
+ break;
+ case 'F':
+ nodefs++;
+ *flags |= att_function;
+ break;
+ case 'f':
+ *flags |= att_function;
+ break;
+ case 'g':
+ if (flags == &flags_on)
+ mkglobal = 1;
+ break;
+ case 'i':
+ *flags |= att_integer;
+ break;
+ case 'n':
+ *flags |= att_nameref;
+ break;
+ case 'r':
+ *flags |= att_readonly;
+ break;
+ case 't':
+ *flags |= att_trace;
+ break;
+ case 'x':
+ *flags |= att_exported;
+ array_needs_making = 1;
+ break;
+#if defined (CASEMOD_ATTRS)
+# if defined (CASEMOD_CAPCASE)
+ case 'c':
+ *flags |= att_capcase;
+ if (flags == &flags_on)
+ flags_off |= att_uppercase|att_lowercase;
+ break;
+# endif
+ case 'l':
+ *flags |= att_lowercase;
+ if (flags == &flags_on)
+ flags_off |= att_capcase|att_uppercase;
+ break;
+ case 'u':
+ *flags |= att_uppercase;
+ if (flags == &flags_on)
+ flags_off |= att_capcase|att_lowercase;
+ break;
+#endif /* CASEMOD_ATTRS */
+ default:
+ builtin_usage ();
+ return (EX_USAGE);
+ }
+ }
+
+ list = loptend;
+
+ /* If there are no more arguments left, then we just want to show
+ some variables. */
+ if (list == 0) /* declare -[aAfFirtx] */
+ {
+ /* Show local variables defined at this context level if this is
+ the `local' builtin. */
+ if (local_var)
+ {
+ register SHELL_VAR **vlist;
+ register int i;
+
+ vlist = all_local_variables ();
+
+ if (vlist)
+ {
+ for (i = 0; vlist[i]; i++)
+ print_assignment (vlist[i]);
+
+ free (vlist);
+ }
+ }
+ else if (pflag && (flags_on == 0 || flags_on == att_function))
+ show_all_var_attributes (flags_on == 0, nodefs);
+ else if (flags_on == 0)
+ return (set_builtin ((WORD_LIST *)NULL));
+ else
+ set_or_show_attributes ((WORD_LIST *)NULL, flags_on, nodefs);
+
+ return (sh_chkwrite (EXECUTION_SUCCESS));
+ }
+
+ if (pflag) /* declare -p [-aAfFirtx] name [name...] */
+ {
+ for (any_failed = 0; list; list = list->next)
+ {
+ if (flags_on & att_function)
+ pflag = show_func_attributes (list->word->word, nodefs);
+ else
+ pflag = show_name_attributes (list->word->word, nodefs);
+ if (pflag)
+ {
+ sh_notfound (list->word->word);
+ any_failed++;
+ }
+ }
+ return (sh_chkwrite (any_failed ? EXECUTION_FAILURE : EXECUTION_SUCCESS));
+ }
+
+#define NEXT_VARIABLE() free (name); list = list->next; continue
+
+ /* There are arguments left, so we are making variables. */
+ while (list) /* declare [-aAfFirx] name [name ...] */
+ {
+ char *value, *name;
+ int offset, aflags;
+#if defined (ARRAY_VARS)
+ int making_array_special, compound_array_assign, simple_array_assign;
+#endif
+
+ name = savestring (list->word->word);
+ offset = assignment (name, 0);
+ aflags = 0;
+
+ if (offset) /* declare [-aAfFirx] name=value */
+ {
+ name[offset] = '\0';
+ value = name + offset + 1;
+ if (name[offset - 1] == '+')
+ {
+ aflags |= ASS_APPEND;
+ name[offset - 1] = '\0';
+ }
+ }
+ else
+ value = "";
+
+ /* Do some lexical error checking on the LHS and RHS of the assignment
+ that is specific to nameref variables. */
+ if (flags_on & att_nameref)
+ {
+#if defined (ARRAY_VARIABLES)
+ if (valid_array_reference (name))
+ {
+ builtin_error (_("%s: reference variable cannot be an array"), name);
+ assign_error++;
+ NEXT_VARIABLE ();
+ }
+ else
+#endif
+ /* disallow self references at global scope */
+ if (STREQ (name, value) && variable_context == 0)
+ {
+ builtin_error (_("%s: nameref variable self references not allowed"), name);
+ assign_error++;
+ NEXT_VARIABLE ();
+ }
+ }
+
+#if defined (ARRAY_VARS)
+ compound_array_assign = simple_array_assign = 0;
+ subscript_start = (char *)NULL;
+ if (t = strchr (name, '[')) /* ] */
+ {
+ /* If offset != 0 we have already validated any array reference */
+ if (offset == 0 && valid_array_reference (name) == 0)
+ {
+ sh_invalidid (name);
+ assign_error++;
+ NEXT_VARIABLE ();
+ }
+ subscript_start = t;
+ *t = '\0';
+ making_array_special = 1;
+ }
+ else
+ making_array_special = 0;
+#endif
+
+ /* If we're in posix mode or not looking for a shell function (since
+ shell function names don't have to be valid identifiers when the
+ shell's not in posix mode), check whether or not the argument is a
+ valid, well-formed shell identifier. */
+ if ((posixly_correct || (flags_on & att_function) == 0) && legal_identifier (name) == 0)
+ {
+ sh_invalidid (name);
+ assign_error++;
+ NEXT_VARIABLE ();
+ }
+
+ /* If VARIABLE_CONTEXT has a non-zero value, then we are executing
+ inside of a function. This means we should make local variables,
+ not global ones. */
+
+ /* XXX - this has consequences when we're making a local copy of a
+ variable that was in the temporary environment. Watch out
+ for this. */
+ refvar = (SHELL_VAR *)NULL;
+ if (variable_context && mkglobal == 0 && ((flags_on & att_function) == 0))
+ {
+ /* Is there already a local variable by this name? */
+ v = find_variable (name);
+ if (v == 0 || local_p (v) == 0 || tempvar_p (v) == 0 || v->context != variable_context)
+ v = 0;
+
+#if defined (ARRAY_VARS)
+ if (flags_on & att_assoc)
+ var = make_local_assoc_variable (name);
+ else if ((flags_on & att_array) || making_array_special)
+ var = make_local_array_variable (name, making_array_special);
+ else
+#endif
+#if 0
+ /* XXX - this doesn't work right yet. */
+ /* See below for rationale for doing this. */
+ if (flags_on & att_nameref)
+ {
+ /* See if we are trying to modify an existing nameref variable */
+ var = find_variable_last_nameref (name);
+ if (var && nameref_p (var) == 0)
+ var = make_local_variable (name);
+ }
+ else if (flags_off & att_nameref)
+ {
+ var = (SHELL_VAR *)NULL;
+ /* See if we are trying to modify an existing nameref variable */
+ refvar = find_variable_last_nameref (name);
+ if (refvar && nameref_p (refvar) == 0)
+ refvar = 0;
+ if (refvar)
+ var = make_local_variable (nameref_cell (refvar));
+ if (var == 0)
+ var = make_local_variable (name);
+ }
+ else
+#endif
+ var = make_local_variable (name);
+ if (var == 0)
+ {
+ any_failed++;
+ NEXT_VARIABLE ();
+ }
+#if 0
+ /* v != 0 means that this is not a local variable at this context */
+ if (offset == 0 && v)
+ VSETATTR (var, att_invisible);
+#endif
+ }
+ else
+ var = (SHELL_VAR *)NULL;
+
+ /* If we are declaring a function, then complain about it in some way.
+ We don't let people make functions by saying `typeset -f foo=bar'. */
+
+ /* There should be a way, however, to let people look at a particular
+ function definition by saying `typeset -f foo'. */
+
+ if (flags_on & att_function)
+ {
+ if (offset) /* declare -f [-rix] foo=bar */
+ {
+ builtin_error (_("cannot use `-f' to make functions"));
+ free (name);
+ return (EXECUTION_FAILURE);
+ }
+ else /* declare -f [-rx] name [name...] */
+ {
+ var = find_function (name);
+
+ if (var)
+ {
+ if (readonly_p (var) && (flags_off & att_readonly))
+ {
+ builtin_error (_("%s: readonly function"), name);
+ any_failed++;
+ NEXT_VARIABLE ();
+ }
+
+ /* declare -[Ff] name [name...] */
+ if (flags_on == att_function && flags_off == 0)
+ {
+#if defined (DEBUGGER)
+ if (nodefs && debugging_mode)
+ {
+ shell_fn = find_function_def (var->name);
+ if (shell_fn)
+ printf ("%s %d %s\n", var->name, shell_fn->line, shell_fn->source_file);
+ else
+ printf ("%s\n", var->name);
+ }
+ else
+#endif /* DEBUGGER */
+ {
+ t = nodefs ? var->name
+ : named_function_string (name, function_cell (var), FUNC_MULTILINE|FUNC_EXTERNAL);
+ printf ("%s\n", t);
+ any_failed = sh_chkwrite (any_failed);
+ }
+ }
+ else /* declare -[fF] -[rx] name [name...] */
+ {
+ VSETATTR (var, flags_on);
+ VUNSETATTR (var, flags_off);
+ }
+ }
+ else
+ any_failed++;
+ NEXT_VARIABLE ();
+ }
+ }
+ else /* declare -[aAirx] name [name...] */
+ {
+ /* Non-null if we just created or fetched a local variable. */
+ /* Here's what ksh93 seems to do. If we are modifying an existing
+ nameref variable, we don't follow the nameref chain past the last
+ nameref, and we set the nameref variable's value so future
+ references to that variable will return the value of the variable
+ we're assigning right now. */
+ if (var == 0 && (flags_on & att_nameref))
+ {
+ /* See if we are trying to modify an existing nameref variable */
+ var = mkglobal ? find_global_variable_last_nameref (name) : find_variable_last_nameref (name);
+ if (var && nameref_p (var) == 0)
+ var = 0;
+ }
+ /* However, if we're turning off the nameref attribute on an existing
+ nameref variable, we first follow the nameref chain to the end,
+ modify the value of the variable this nameref variable references,
+ *CHANGING ITS VALUE AS A SIDE EFFECT* then turn off the nameref
+ flag *LEAVING THE NAMEREF VARIABLE'S VALUE UNCHANGED* */
+ else if (var == 0 && (flags_off & att_nameref))
+ {
+ /* See if we are trying to modify an existing nameref variable */
+ refvar = mkglobal ? find_global_variable_last_nameref (name) : find_variable_last_nameref (name);
+ if (refvar && nameref_p (refvar) == 0)
+ refvar = 0;
+ if (refvar)
+ var = mkglobal ? find_global_variable (nameref_cell (refvar)) : find_variable (nameref_cell (refvar));
+ }
+
+ if (var == 0)
+ var = mkglobal ? find_global_variable (name) : find_variable (name);
+
+ if (var == 0)
+ {
+#if defined (ARRAY_VARS)
+ if (flags_on & att_assoc)
+ {
+ var = make_new_assoc_variable (name);
+ if (offset == 0)
+ VSETATTR (var, att_invisible);
+ }
+ else if ((flags_on & att_array) || making_array_special)
+ {
+ var = make_new_array_variable (name);
+ if (offset == 0)
+ VSETATTR (var, att_invisible);
+ }
+ else
+#endif
+
+ if (offset)
+ var = mkglobal ? bind_global_variable (name, "", 0) : bind_variable (name, "", 0);
+ else
+ {
+ var = mkglobal ? bind_global_variable (name, (char *)NULL, 0) : bind_variable (name, (char *)NULL, 0);
+ VSETATTR (var, att_invisible);
+ }
+ }
+ /* Can't take an existing array variable and make it a nameref */
+ else if ((array_p (var) || assoc_p (var)) && (flags_on & att_nameref))
+ {
+ builtin_error (_("%s: reference variable cannot be an array"), name);
+ assign_error++;
+ NEXT_VARIABLE ();
+ }
+
+ /* Cannot use declare +r to turn off readonly attribute. */
+ if (readonly_p (var) && (flags_off & att_readonly))
+ {
+ sh_readonly (name);
+ any_failed++;
+ NEXT_VARIABLE ();
+ }
+
+ /* Cannot use declare to assign value to readonly or noassign
+ variable. */
+ if ((readonly_p (var) || noassign_p (var)) && offset)
+ {
+ if (readonly_p (var))
+ sh_readonly (name);
+ assign_error++;
+ NEXT_VARIABLE ();
+ }
+
+#if defined (ARRAY_VARS)
+ if ((making_array_special || (flags_on & (att_array|att_assoc)) || array_p (var) || assoc_p (var)) && offset)
+ {
+ int vlen;
+ vlen = STRLEN (value);
+
+ if (value[0] == '(' && value[vlen-1] == ')')
+ compound_array_assign = 1;
+ else
+ simple_array_assign = 1;
+ }
+
+ /* Cannot use declare +a name or declare +A name to remove an
+ array variable. */
+ if (((flags_off & att_array) && array_p (var)) || ((flags_off & att_assoc) && assoc_p (var)))
+ {
+ builtin_error (_("%s: cannot destroy array variables in this way"), name);
+ any_failed++;
+ NEXT_VARIABLE ();
+ }
+
+ if ((flags_on & att_array) && assoc_p (var))
+ {
+ builtin_error (_("%s: cannot convert associative to indexed array"), name);
+ any_failed++;
+ NEXT_VARIABLE ();
+ }
+ if ((flags_on & att_assoc) && array_p (var))
+ {
+ builtin_error (_("%s: cannot convert indexed to associative array"), name);
+ any_failed++;
+ NEXT_VARIABLE ();
+ }
+
+ /* declare -A name[[n]] makes name an associative array variable. */
+ if (flags_on & att_assoc)
+ {
+ if (assoc_p (var) == 0)
+ var = convert_var_to_assoc (var);
+ }
+ /* declare -a name[[n]] or declare name[n] makes name an indexed
+ array variable. */
+ else if ((making_array_special || (flags_on & att_array)) && array_p (var) == 0 && assoc_p (var) == 0)
+ var = convert_var_to_array (var);
+#endif /* ARRAY_VARS */
+
+ /* XXX - we note that we are turning on nameref attribute and defer
+ setting it until the assignment has been made so we don't do an
+ inadvertent nameref lookup. Might have to do the same thing for
+ flags_off&att_nameref. */
+ /* XXX - ksh93 makes it an error to set a readonly nameref variable
+ using a single typeset command. */
+ onref = (flags_on & att_nameref);
+ flags_on &= ~att_nameref;
+#if defined (ARRAY_VARS)
+ if (array_p (var) || assoc_p (var)
+ || (offset && compound_array_assign)
+ || simple_array_assign)
+ onref = 0; /* array variables may not be namerefs */
+#endif
+
+ /* ksh93 seems to do this */
+ offref = (flags_off & att_nameref);
+ flags_off &= ~att_nameref;
+
+ VSETATTR (var, flags_on);
+ VUNSETATTR (var, flags_off);
+
+#if defined (ARRAY_VARS)
+ if (offset && compound_array_assign)
+ assign_array_var_from_string (var, value, aflags);
+ else if (simple_array_assign && subscript_start)
+ {
+ /* declare [-aA] name[N]=value */
+ *subscript_start = '['; /* ] */
+ var = assign_array_element (name, value, 0); /* XXX - not aflags */
+ *subscript_start = '\0';
+ if (var == 0) /* some kind of assignment error */
+ {
+ assign_error++;
+ flags_on |= onref;
+ flags_off |= offref;
+ NEXT_VARIABLE ();
+ }
+ }
+ else if (simple_array_assign)
+ {
+ /* let bind_{array,assoc}_variable take care of this. */
+ if (assoc_p (var))
+ bind_assoc_variable (var, name, savestring ("0"), value, aflags);
+ else
+ bind_array_variable (name, 0, value, aflags);
+ }
+ else
+#endif
+ /* bind_variable_value duplicates the essential internals of
+ bind_variable() */
+ if (offset)
+ bind_variable_value (var, value, aflags);
+
+ /* If we found this variable in the temporary environment, as with
+ `var=value declare -x var', make sure it is treated identically
+ to `var=value export var'. Do the same for `declare -r' and
+ `readonly'. Preserve the attributes, except for att_tempvar. */
+ /* XXX -- should this create a variable in the global scope, or
+ modify the local variable flags? ksh93 has it modify the
+ global scope.
+ Need to handle case like in set_var_attribute where a temporary
+ variable is in the same table as the function local vars. */
+ if ((flags_on & (att_exported|att_readonly)) && tempvar_p (var))
+ {
+ SHELL_VAR *tv;
+ char *tvalue;
+
+ tv = find_tempenv_variable (var->name);
+ if (tv)
+ {
+ tvalue = var_isset (var) ? savestring (value_cell (var)) : savestring ("");
+ tv = bind_variable (var->name, tvalue, 0);
+ tv->attributes |= var->attributes & ~att_tempvar;
+ if (tv->context > 0)
+ VSETATTR (tv, att_propagate);
+ free (tvalue);
+ }
+ VSETATTR (var, att_propagate);
+ }
+ }
+
+ /* Turn on nameref attribute we deferred above. */
+ /* XXX - should we turn on the noassign attribute for consistency with
+ ksh93 when we turn on the nameref attribute? */
+ VSETATTR (var, onref);
+ flags_on |= onref;
+ VUNSETATTR (var, offref);
+ flags_off |= offref;
+ /* Yuck. ksh93 compatibility */
+ if (refvar)
+ VUNSETATTR (refvar, flags_off);
+
+ stupidly_hack_special_variables (name);
+
+ NEXT_VARIABLE ();
+ }
+
+ return (assign_error ? EX_BADASSIGN
+ : ((any_failed == 0) ? EXECUTION_SUCCESS
+ : EXECUTION_FAILURE));
+}
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);
}
}
--- /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 */
+
+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 ();
+
+ return (EXECUTION_SUCCESS);
+ }
+ }
+ }
+
+#if defined (COMMAND_TIMING)
+ if (command->flags & CMD_TIME_PIPELINE)
+ {
+ if (asynchronous)
+ {
+ command->flags |= CMD_FORCE_SUBSHELL;
+ exec_result = execute_command_internal (command, 1, pipe_in, pipe_out, fds_to_close);
+ }
+ else
+ {
+ exec_result = time_command (command, asynchronous, pipe_in, pipe_out, fds_to_close);
+#if 0
+ if (running_trap == 0)
+#endif
+ currently_executing_command = (COMMAND *)NULL;
+ }
+ return (exec_result);
+ }
+#endif /* COMMAND_TIMING */
+
+ if (shell_control_structure (command->type) && command->redirects)
+ stdin_redir = stdin_redirects (command->redirects);
+
+#if defined (PROCESS_SUBSTITUTION)
+ if (variable_context != 0)
+ {
+ ofifo = num_fifos ();
+ ofifo_list = copy_fifo_list ((int *)&osize);
+ saved_fifo = 1;
+ }
+ else
+ saved_fifo = 0;
+#endif
+
+ /* Handle WHILE FOR CASE etc. with redirections. (Also '&' input
+ redirection.) */
+ if (do_redirections (command->redirects, RX_ACTIVE|RX_UNDOABLE) != 0)
+ {
+ cleanup_redirects (redirection_undo_list);
+ redirection_undo_list = (REDIRECT *)NULL;
+ dispose_exec_redirects ();
+#if defined (PROCESS_SUBSTITUTION)
+ if (saved_fifo)
+ free ((void *)ofifo_list);
+#endif
+ return (last_command_exit_value = EXECUTION_FAILURE);
+ }
+
+ if (redirection_undo_list)
+ {
+ /* XXX - why copy here? */
+ my_undo_list = (REDIRECT *)copy_redirects (redirection_undo_list);
+ dispose_redirects (redirection_undo_list);
+ redirection_undo_list = (REDIRECT *)NULL;
+ }
+ else
+ my_undo_list = (REDIRECT *)NULL;
+
+ if (exec_redirection_undo_list)
+ {
+ /* XXX - why copy here? */
+ exec_undo_list = (REDIRECT *)copy_redirects (exec_redirection_undo_list);
+ dispose_redirects (exec_redirection_undo_list);
+ exec_redirection_undo_list = (REDIRECT *)NULL;
+ }
+ else
+ exec_undo_list = (REDIRECT *)NULL;
+
+ if (my_undo_list || exec_undo_list)
+ begin_unwind_frame ("loop_redirections");
+
+ if (my_undo_list)
+ add_unwind_protect ((Function *)cleanup_redirects, my_undo_list);
+
+ if (exec_undo_list)
+ add_unwind_protect ((Function *)dispose_redirects, exec_undo_list);
+
+ ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
+
+ QUIT;
+
+ switch (command->type)
+ {
+ case cm_simple:
+ {
+ save_line_number = line_number;
+ /* We can't rely on variables retaining their values across a
+ call to execute_simple_command if a longjmp occurs as the
+ result of a `return' builtin. This is true for sure with gcc. */
+#if defined (RECYCLES_PIDS)
+ last_made_pid = NO_PID;
+#endif
+ last_pid = last_made_pid;
+ was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0;
+
+ if (ignore_return && command->value.Simple)
+ command->value.Simple->flags |= CMD_IGNORE_RETURN;
+ if (command->flags & CMD_STDIN_REDIR)
+ command->value.Simple->flags |= CMD_STDIN_REDIR;
+
+ line_number_for_err_trap = line_number = command->value.Simple->line;
+ exec_result =
+ execute_simple_command (command->value.Simple, pipe_in, pipe_out,
+ asynchronous, fds_to_close);
+ line_number = save_line_number;
+
+ /* The temporary environment should be used for only the simple
+ command immediately following its definition. */
+ dispose_used_env_vars ();
+
+#if (defined (ultrix) && defined (mips)) || defined (C_ALLOCA)
+ /* Reclaim memory allocated with alloca () on machines which
+ may be using the alloca emulation code. */
+ (void) alloca (0);
+#endif /* (ultrix && mips) || C_ALLOCA */
+
+ /* If we forked to do the command, then we must wait_for ()
+ the child. */
+
+ /* XXX - this is something to watch out for if there are problems
+ when the shell is compiled without job control. Don't worry about
+ whether or not last_made_pid == last_pid; already_making_children
+ tells us whether or not there are unwaited-for children to wait
+ for and reap. */
+ if (already_making_children && pipe_out == NO_PIPE)
+ {
+ stop_pipeline (asynchronous, (COMMAND *)NULL);
+
+ if (asynchronous)
+ {
+ DESCRIBE_PID (last_made_pid);
+ }
+ else
+#if !defined (JOB_CONTROL)
+ /* Do not wait for asynchronous processes started from
+ startup files. */
+ if (last_made_pid != last_asynchronous_pid)
+#endif
+ /* When executing a shell function that executes other
+ commands, this causes the last simple command in
+ the function to be waited for twice. This also causes
+ subshells forked to execute builtin commands (e.g., in
+ pipelines) to be waited for twice. */
+ exec_result = wait_for (last_made_pid);
+ }
+ }
+
+ /* 2009/02/13 -- pipeline failure is processed elsewhere. This handles
+ only the failure of a simple command. */
+ if (was_error_trap && ignore_return == 0 && invert == 0 && pipe_in == NO_PIPE && pipe_out == NO_PIPE && exec_result != EXECUTION_SUCCESS)
+ {
+ last_command_exit_value = exec_result;
+ line_number = line_number_for_err_trap;
+ run_error_trap ();
+ line_number = save_line_number;
+ }
+
+ if (ignore_return == 0 && invert == 0 &&
+ ((posixly_correct && interactive == 0 && special_builtin_failed) ||
+ (exit_immediately_on_error && pipe_in == NO_PIPE && pipe_out == NO_PIPE && exec_result != EXECUTION_SUCCESS)))
+ {
+ last_command_exit_value = exec_result;
+ run_pending_traps ();
+ jump_to_top_level (ERREXIT);
+ }
+
+ break;
+
+ case cm_for:
+ if (ignore_return)
+ command->value.For->flags |= CMD_IGNORE_RETURN;
+ exec_result = execute_for_command (command->value.For);
+ break;
+
+#if defined (ARITH_FOR_COMMAND)
+ case cm_arith_for:
+ if (ignore_return)
+ command->value.ArithFor->flags |= CMD_IGNORE_RETURN;
+ exec_result = execute_arith_for_command (command->value.ArithFor);
+ break;
+#endif
+
+#if defined (SELECT_COMMAND)
+ case cm_select:
+ if (ignore_return)
+ command->value.Select->flags |= CMD_IGNORE_RETURN;
+ exec_result = execute_select_command (command->value.Select);
+ break;
+#endif
+
+ case cm_case:
+ if (ignore_return)
+ command->value.Case->flags |= CMD_IGNORE_RETURN;
+ exec_result = execute_case_command (command->value.Case);
+ break;
+
+ case cm_while:
+ if (ignore_return)
+ command->value.While->flags |= CMD_IGNORE_RETURN;
+ exec_result = execute_while_command (command->value.While);
+ break;
+
+ case cm_until:
+ if (ignore_return)
+ command->value.While->flags |= CMD_IGNORE_RETURN;
+ exec_result = execute_until_command (command->value.While);
+ break;
+
+ case cm_if:
+ if (ignore_return)
+ command->value.If->flags |= CMD_IGNORE_RETURN;
+ exec_result = execute_if_command (command->value.If);
+ break;
+
+ case cm_group:
+
+ /* This code can be executed from either of two paths: an explicit
+ '{}' command, or via a function call. If we are executed via a
+ function call, we have already taken care of the function being
+ executed in the background (down there in execute_simple_command ()),
+ and this command should *not* be marked as asynchronous. If we
+ are executing a regular '{}' group command, and asynchronous == 1,
+ we must want to execute the whole command in the background, so we
+ need a subshell, and we want the stuff executed in that subshell
+ (this group command) to be executed in the foreground of that
+ subshell (i.e. there will not be *another* subshell forked).
+
+ What we do is to force a subshell if asynchronous, and then call
+ execute_command_internal again with asynchronous still set to 1,
+ but with the original group command, so the printed command will
+ look right.
+
+ The code above that handles forking off subshells will note that
+ both subshell and async are on, and turn off async in the child
+ after forking the subshell (but leave async set in the parent, so
+ the normal call to describe_pid is made). This turning off
+ async is *crucial*; if it is not done, this will fall into an
+ infinite loop of executions through this spot in subshell after
+ subshell until the process limit is exhausted. */
+
+ if (asynchronous)
+ {
+ command->flags |= CMD_FORCE_SUBSHELL;
+ exec_result =
+ execute_command_internal (command, 1, pipe_in, pipe_out,
+ fds_to_close);
+ }
+ else
+ {
+ if (ignore_return && command->value.Group->command)
+ command->value.Group->command->flags |= CMD_IGNORE_RETURN;
+ exec_result =
+ execute_command_internal (command->value.Group->command,
+ asynchronous, pipe_in, pipe_out,
+ fds_to_close);
+ }
+ break;
+
+ case cm_connection:
+ exec_result = execute_connection (command, asynchronous,
+ pipe_in, pipe_out, fds_to_close);
+ break;
+
+#if defined (DPAREN_ARITHMETIC)
+ case cm_arith:
+ was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0;
+ if (ignore_return)
+ command->value.Arith->flags |= CMD_IGNORE_RETURN;
+ line_number_for_err_trap = save_line_number = line_number;
+ exec_result = execute_arith_command (command->value.Arith);
+ line_number = save_line_number;
+
+ if (was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS)
+ {
+ last_command_exit_value = exec_result;
+ save_line_number = line_number;
+ line_number = line_number_for_err_trap;
+ run_error_trap ();
+ line_number = save_line_number;
+ }
+
+ if (ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS)
+ {
+ last_command_exit_value = exec_result;
+ run_pending_traps ();
+ jump_to_top_level (ERREXIT);
+ }
+
+ break;
+#endif
+
+#if defined (COND_COMMAND)
+ case cm_cond:
+ was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0;
+ if (ignore_return)
+ command->value.Cond->flags |= CMD_IGNORE_RETURN;
+
+ line_number_for_err_trap = save_line_number = line_number;
+ exec_result = execute_cond_command (command->value.Cond);
+ line_number = save_line_number;
+
+ if (was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS)
+ {
+ last_command_exit_value = exec_result;
+ save_line_number = line_number;
+ line_number = line_number_for_err_trap;
+ run_error_trap ();
+ line_number = save_line_number;
+ }
+
+ if (ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS)
+ {
+ last_command_exit_value = exec_result;
+ run_pending_traps ();
+ jump_to_top_level (ERREXIT);
+ }
+
+ break;
+#endif
+
+ case cm_function_def:
+ exec_result = execute_intern_function (command->value.Function_def->name,
+ command->value.Function_def);
+ break;
+
+ default:
+ command_error ("execute_command", CMDERR_BADTYPE, command->type, 0);
+ }
+
+ if (my_undo_list)
+ {
+ do_redirections (my_undo_list, RX_ACTIVE);
+ dispose_redirects (my_undo_list);
+ }
+
+ if (exec_undo_list)
+ dispose_redirects (exec_undo_list);
+
+ if (my_undo_list || exec_undo_list)
+ discard_unwind_frame ("loop_redirections");
+
+#if defined (PROCESS_SUBSTITUTION)
+ if (saved_fifo)
+ {
+ nfifo = num_fifos ();
+ if (nfifo > ofifo)
+ close_new_fifos ((char *)ofifo_list, osize);
+ free ((void *)ofifo_list);
+ }
+#endif
+
+ /* Invert the return value if we have to */
+ if (invert)
+ exec_result = (exec_result == EXECUTION_SUCCESS)
+ ? EXECUTION_FAILURE
+ : EXECUTION_SUCCESS;
+
+#if defined (DPAREN_ARITHMETIC) || defined (COND_COMMAND)
+ /* This is where we set PIPESTATUS from the exit status of the appropriate
+ compound commands (the ones that look enough like simple commands to
+ cause confusion). We might be able to optimize by not doing this if
+ subshell_environment != 0. */
+ switch (command->type)
+ {
+# if defined (DPAREN_ARITHMETIC)
+ case cm_arith:
+# endif
+# if defined (COND_COMMAND)
+ case cm_cond:
+# endif
+ set_pipestatus_from_exit (exec_result);
+ break;
+ }
+#endif
+
+ last_command_exit_value = exec_result;
+ run_pending_traps ();
+#if 0
+ if (running_trap == 0)
+#endif
+ currently_executing_command = (COMMAND *)NULL;
+
+ return (last_command_exit_value);
+}
+
+#if defined (COMMAND_TIMING)
+
+#if defined (HAVE_GETRUSAGE) && defined (HAVE_GETTIMEOFDAY)
+extern struct timeval *difftimeval __P((struct timeval *, struct timeval *, struct timeval *));
+extern struct timeval *addtimeval __P((struct timeval *, struct timeval *, struct timeval *));
+extern int timeval_to_cpu __P((struct timeval *, struct timeval *, struct timeval *));
+#endif
+
+#define POSIX_TIMEFORMAT "real %2R\nuser %2U\nsys %2S"
+#define BASH_TIMEFORMAT "\nreal\t%3lR\nuser\t%3lU\nsys\t%3lS"
+
+static const int precs[] = { 0, 100, 10, 1 };
+
+/* Expand one `%'-prefixed escape sequence from a time format string. */
+static int
+mkfmt (buf, prec, lng, sec, sec_fraction)
+ char *buf;
+ int prec, lng;
+ time_t sec;
+ int sec_fraction;
+{
+ time_t min;
+ char abuf[INT_STRLEN_BOUND(time_t) + 1];
+ int ind, aind;
+
+ ind = 0;
+ abuf[sizeof(abuf) - 1] = '\0';
+
+ /* If LNG is non-zero, we want to decompose SEC into minutes and seconds. */
+ if (lng)
+ {
+ min = sec / 60;
+ sec %= 60;
+ aind = sizeof(abuf) - 2;
+ do
+ abuf[aind--] = (min % 10) + '0';
+ while (min /= 10);
+ aind++;
+ while (abuf[aind])
+ buf[ind++] = abuf[aind++];
+ buf[ind++] = 'm';
+ }
+
+ /* Now add the seconds. */
+ aind = sizeof (abuf) - 2;
+ do
+ abuf[aind--] = (sec % 10) + '0';
+ while (sec /= 10);
+ aind++;
+ while (abuf[aind])
+ buf[ind++] = abuf[aind++];
+
+ /* We want to add a decimal point and PREC places after it if PREC is
+ nonzero. PREC is not greater than 3. SEC_FRACTION is between 0
+ and 999. */
+ if (prec != 0)
+ {
+ buf[ind++] = '.';
+ for (aind = 1; aind <= prec; aind++)
+ {
+ buf[ind++] = (sec_fraction / precs[aind]) + '0';
+ sec_fraction %= precs[aind];
+ }
+ }
+
+ if (lng)
+ buf[ind++] = 's';
+ buf[ind] = '\0';
+
+ return (ind);
+}
+
+/* Interpret the format string FORMAT, interpolating the following escape
+ sequences:
+ %[prec][l][RUS]
+
+ where the optional `prec' is a precision, meaning the number of
+ characters after the decimal point, the optional `l' means to format
+ using minutes and seconds (MMmNN[.FF]s), like the `times' builtin',
+ and the last character is one of
+
+ R number of seconds of `real' time
+ U number of seconds of `user' time
+ S number of seconds of `system' time
+
+ An occurrence of `%%' in the format string is translated to a `%'. The
+ result is printed to FP, a pointer to a FILE. The other variables are
+ the seconds and thousandths of a second of real, user, and system time,
+ resectively. */
+static void
+print_formatted_time (fp, format, rs, rsf, us, usf, ss, ssf, cpu)
+ FILE *fp;
+ char *format;
+ time_t rs;
+ int rsf;
+ time_t us;
+ int usf;
+ time_t ss;
+ int ssf, cpu;
+{
+ int prec, lng, len;
+ char *str, *s, ts[INT_STRLEN_BOUND (time_t) + sizeof ("mSS.FFFF")];
+ time_t sum;
+ int sum_frac;
+ int sindex, ssize;
+
+ len = strlen (format);
+ ssize = (len + 64) - (len % 64);
+ str = (char *)xmalloc (ssize);
+ sindex = 0;
+
+ for (s = format; *s; s++)
+ {
+ if (*s != '%' || s[1] == '\0')
+ {
+ RESIZE_MALLOCED_BUFFER (str, sindex, 1, ssize, 64);
+ str[sindex++] = *s;
+ }
+ else if (s[1] == '%')
+ {
+ s++;
+ RESIZE_MALLOCED_BUFFER (str, sindex, 1, ssize, 64);
+ str[sindex++] = *s;
+ }
+ else if (s[1] == 'P')
+ {
+ s++;
+#if 0
+ /* clamp CPU usage at 100% */
+ if (cpu > 10000)
+ cpu = 10000;
+#endif
+ sum = cpu / 100;
+ sum_frac = (cpu % 100) * 10;
+ len = mkfmt (ts, 2, 0, sum, sum_frac);
+ RESIZE_MALLOCED_BUFFER (str, sindex, len, ssize, 64);
+ strcpy (str + sindex, ts);
+ sindex += len;
+ }
+ else
+ {
+ prec = 3; /* default is three places past the decimal point. */
+ lng = 0; /* default is to not use minutes or append `s' */
+ s++;
+ if (DIGIT (*s)) /* `precision' */
+ {
+ prec = *s++ - '0';
+ if (prec > 3) prec = 3;
+ }
+ if (*s == 'l') /* `length extender' */
+ {
+ lng = 1;
+ s++;
+ }
+ if (*s == 'R' || *s == 'E')
+ len = mkfmt (ts, prec, lng, rs, rsf);
+ else if (*s == 'U')
+ len = mkfmt (ts, prec, lng, us, usf);
+ else if (*s == 'S')
+ len = mkfmt (ts, prec, lng, ss, ssf);
+ else
+ {
+ internal_error (_("TIMEFORMAT: `%c': invalid format character"), *s);
+ free (str);
+ return;
+ }
+ RESIZE_MALLOCED_BUFFER (str, sindex, len, ssize, 64);
+ strcpy (str + sindex, ts);
+ sindex += len;
+ }
+ }
+
+ str[sindex] = '\0';
+ fprintf (fp, "%s\n", str);
+ fflush (fp);
+
+ free (str);
+}
+
+static int
+time_command (command, asynchronous, pipe_in, pipe_out, fds_to_close)
+ COMMAND *command;
+ int asynchronous, pipe_in, pipe_out;
+ struct fd_bitmap *fds_to_close;
+{
+ int rv, posix_time, old_flags, nullcmd;
+ time_t rs, us, ss;
+ int rsf, usf, ssf;
+ int cpu;
+ char *time_format;
+
+#if defined (HAVE_GETRUSAGE) && defined (HAVE_GETTIMEOFDAY)
+ struct timeval real, user, sys;
+ struct timeval before, after;
+# if defined (HAVE_STRUCT_TIMEZONE)
+ struct timezone dtz; /* posix doesn't define this */
+# endif
+ struct rusage selfb, selfa, kidsb, kidsa; /* a = after, b = before */
+#else
+# if defined (HAVE_TIMES)
+ clock_t tbefore, tafter, real, user, sys;
+ struct tms before, after;
+# endif
+#endif
+
+#if defined (HAVE_GETRUSAGE) && defined (HAVE_GETTIMEOFDAY)
+# if defined (HAVE_STRUCT_TIMEZONE)
+ gettimeofday (&before, &dtz);
+# else
+ gettimeofday (&before, (void *)NULL);
+# endif /* !HAVE_STRUCT_TIMEZONE */
+ getrusage (RUSAGE_SELF, &selfb);
+ getrusage (RUSAGE_CHILDREN, &kidsb);
+#else
+# if defined (HAVE_TIMES)
+ tbefore = times (&before);
+# endif
+#endif
+
+ posix_time = command && (command->flags & CMD_TIME_POSIX);
+
+ nullcmd = (command == 0) || (command->type == cm_simple && command->value.Simple->words == 0 && command->value.Simple->redirects == 0);
+ if (posixly_correct && nullcmd)
+ {
+#if defined (HAVE_GETRUSAGE)
+ selfb.ru_utime.tv_sec = kidsb.ru_utime.tv_sec = selfb.ru_stime.tv_sec = kidsb.ru_stime.tv_sec = 0;
+ selfb.ru_utime.tv_usec = kidsb.ru_utime.tv_usec = selfb.ru_stime.tv_usec = kidsb.ru_stime.tv_usec = 0;
+ before.tv_sec = shell_start_time;
+ before.tv_usec = 0;
+#else
+ before.tms_utime = before.tms_stime = before.tms_cutime = before.tms_cstime = 0;
+ tbefore = shell_start_time;
+#endif
+ }
+
+ old_flags = command->flags;
+ command->flags &= ~(CMD_TIME_PIPELINE|CMD_TIME_POSIX);
+ rv = execute_command_internal (command, asynchronous, pipe_in, pipe_out, fds_to_close);
+ command->flags = old_flags;
+
+ rs = us = ss = 0;
+ rsf = usf = ssf = cpu = 0;
+
+#if defined (HAVE_GETRUSAGE) && defined (HAVE_GETTIMEOFDAY)
+# if defined (HAVE_STRUCT_TIMEZONE)
+ gettimeofday (&after, &dtz);
+# else
+ gettimeofday (&after, (void *)NULL);
+# endif /* !HAVE_STRUCT_TIMEZONE */
+ getrusage (RUSAGE_SELF, &selfa);
+ getrusage (RUSAGE_CHILDREN, &kidsa);
+
+ difftimeval (&real, &before, &after);
+ timeval_to_secs (&real, &rs, &rsf);
+
+ addtimeval (&user, difftimeval(&after, &selfb.ru_utime, &selfa.ru_utime),
+ difftimeval(&before, &kidsb.ru_utime, &kidsa.ru_utime));
+ timeval_to_secs (&user, &us, &usf);
+
+ addtimeval (&sys, difftimeval(&after, &selfb.ru_stime, &selfa.ru_stime),
+ difftimeval(&before, &kidsb.ru_stime, &kidsa.ru_stime));
+ timeval_to_secs (&sys, &ss, &ssf);
+
+ cpu = timeval_to_cpu (&real, &user, &sys);
+#else
+# if defined (HAVE_TIMES)
+ tafter = times (&after);
+
+ real = tafter - tbefore;
+ clock_t_to_secs (real, &rs, &rsf);
+
+ user = (after.tms_utime - before.tms_utime) + (after.tms_cutime - before.tms_cutime);
+ clock_t_to_secs (user, &us, &usf);
+
+ sys = (after.tms_stime - before.tms_stime) + (after.tms_cstime - before.tms_cstime);
+ clock_t_to_secs (sys, &ss, &ssf);
+
+ cpu = (real == 0) ? 0 : ((user + sys) * 10000) / real;
+
+# else
+ rs = us = ss = 0;
+ rsf = usf = ssf = cpu = 0;
+# endif
+#endif
+
+ if (posix_time)
+ time_format = POSIX_TIMEFORMAT;
+ else if ((time_format = get_string_value ("TIMEFORMAT")) == 0)
+ {
+ if (posixly_correct && nullcmd)
+ time_format = "user\t%2lU\nsys\t%2lS";
+ else
+ time_format = BASH_TIMEFORMAT;
+ }
+ if (time_format && *time_format)
+ print_formatted_time (stderr, time_format, rs, rsf, us, usf, ss, ssf, cpu);
+
+ return rv;
+}
+#endif /* COMMAND_TIMING */
+
+/* Execute a command that's supposed to be in a subshell. This must be
+ called after make_child and we must be running in the child process.
+ The caller will return or exit() immediately with the value this returns. */
+static int
+execute_in_subshell (command, asynchronous, pipe_in, pipe_out, fds_to_close)
+ COMMAND *command;
+ int asynchronous;
+ int pipe_in, pipe_out;
+ struct fd_bitmap *fds_to_close;
+{
+ int user_subshell, return_code, function_value, should_redir_stdin, invert;
+ int ois, user_coproc;
+ int result;
+ volatile COMMAND *tcom;
+
+ USE_VAR(user_subshell);
+ USE_VAR(user_coproc);
+ USE_VAR(invert);
+ USE_VAR(tcom);
+ USE_VAR(asynchronous);
+
+ subshell_level++;
+ should_redir_stdin = (asynchronous && (command->flags & CMD_STDIN_REDIR) &&
+ pipe_in == NO_PIPE &&
+ stdin_redirects (command->redirects) == 0);
+
+ invert = (command->flags & CMD_INVERT_RETURN) != 0;
+ user_subshell = command->type == cm_subshell || ((command->flags & CMD_WANT_SUBSHELL) != 0);
+ user_coproc = command->type == cm_coproc;
+
+ command->flags &= ~(CMD_FORCE_SUBSHELL | CMD_WANT_SUBSHELL | CMD_INVERT_RETURN);
+
+ /* If a command is asynchronous in a subshell (like ( foo ) & or
+ the special case of an asynchronous GROUP command where the
+ the subshell bit is turned on down in case cm_group: below),
+ turn off `asynchronous', so that two subshells aren't spawned.
+ XXX - asynchronous used to be set to 0 in this block, but that
+ means that setup_async_signals was never run. Now it's set to
+ 0 after subshell_environment is set appropriately and setup_async_signals
+ is run.
+
+ This seems semantically correct to me. For example,
+ ( foo ) & seems to say ``do the command `foo' in a subshell
+ environment, but don't wait for that subshell to finish'',
+ and "{ foo ; bar ; } &" seems to me to be like functions or
+ builtins in the background, which executed in a subshell
+ environment. I just don't see the need to fork two subshells. */
+
+ /* Don't fork again, we are already in a subshell. A `doubly
+ async' shell is not interactive, however. */
+ if (asynchronous)
+ {
+#if defined (JOB_CONTROL)
+ /* If a construct like ( exec xxx yyy ) & is given while job
+ control is active, we want to prevent exec from putting the
+ subshell back into the original process group, carefully
+ undoing all the work we just did in make_child. */
+ original_pgrp = -1;
+#endif /* JOB_CONTROL */
+ ois = interactive_shell;
+ interactive_shell = 0;
+ /* This test is to prevent alias expansion by interactive shells that
+ run `(command) &' but to allow scripts that have enabled alias
+ expansion with `shopt -s expand_alias' to continue to expand
+ aliases. */
+ if (ois != interactive_shell)
+ expand_aliases = 0;
+ }
+
+ /* Subshells are neither login nor interactive. */
+ login_shell = interactive = 0;
+
+ if (user_subshell)
+ subshell_environment = SUBSHELL_PAREN;
+ else
+ {
+ subshell_environment = 0; /* XXX */
+ if (asynchronous)
+ subshell_environment |= SUBSHELL_ASYNC;
+ if (pipe_in != NO_PIPE || pipe_out != NO_PIPE)
+ subshell_environment |= SUBSHELL_PIPE;
+ if (user_coproc)
+ subshell_environment |= SUBSHELL_COPROC;
+ }
+
+ reset_terminating_signals (); /* in sig.c */
+ /* Cancel traps, in trap.c. */
+ /* Reset the signal handlers in the child, but don't free the
+ trap strings. Set a flag noting that we have to free the
+ trap strings if we run trap to change a signal disposition. */
+ reset_signal_handlers ();
+ subshell_environment |= SUBSHELL_RESETTRAP;
+
+ /* Make sure restore_original_signals doesn't undo the work done by
+ make_child to ensure that asynchronous children are immune to SIGINT
+ and SIGQUIT. Turn off asynchronous to make sure more subshells are
+ not spawned. */
+ if (asynchronous)
+ {
+ setup_async_signals ();
+ asynchronous = 0;
+ }
+
+#if defined (JOB_CONTROL)
+ set_sigchld_handler ();
+#endif /* JOB_CONTROL */
+
+ set_sigint_handler ();
+
+#if defined (JOB_CONTROL)
+ /* Delete all traces that there were any jobs running. This is
+ only for subshells. */
+ without_job_control ();
+#endif /* JOB_CONTROL */
+
+ if (fds_to_close)
+ close_fd_bitmap (fds_to_close);
+
+ do_piping (pipe_in, pipe_out);
+
+#if defined (COPROCESS_SUPPORT)
+ coproc_closeall ();
+#endif
+
+ /* If this is a user subshell, set a flag if stdin was redirected.
+ This is used later to decide whether to redirect fd 0 to
+ /dev/null for async commands in the subshell. This adds more
+ sh compatibility, but I'm not sure it's the right thing to do. */
+ if (user_subshell)
+ {
+ stdin_redir = stdin_redirects (command->redirects);
+ restore_default_signal (EXIT_TRAP);
+ }
+
+ /* If this is an asynchronous command (command &), we want to
+ redirect the standard input from /dev/null in the absence of
+ any specific redirection involving stdin. */
+ if (should_redir_stdin && stdin_redir == 0)
+ async_redirect_stdin ();
+
+ /* Do redirections, then dispose of them before recursive call. */
+ if (command->redirects)
+ {
+ if (do_redirections (command->redirects, RX_ACTIVE) != 0)
+ exit (invert ? EXECUTION_SUCCESS : EXECUTION_FAILURE);
+
+ dispose_redirects (command->redirects);
+ command->redirects = (REDIRECT *)NULL;
+ }
+
+ if (command->type == cm_subshell)
+ tcom = command->value.Subshell->command;
+ else if (user_coproc)
+ tcom = command->value.Coproc->command;
+ else
+ tcom = command;
+
+ if (command->flags & CMD_TIME_PIPELINE)
+ tcom->flags |= CMD_TIME_PIPELINE;
+ if (command->flags & CMD_TIME_POSIX)
+ tcom->flags |= CMD_TIME_POSIX;
+
+ /* Make sure the subshell inherits any CMD_IGNORE_RETURN flag. */
+ if ((command->flags & CMD_IGNORE_RETURN) && tcom != command)
+ tcom->flags |= CMD_IGNORE_RETURN;
+
+ /* If this is a simple command, tell execute_disk_command that it
+ might be able to get away without forking and simply exec.
+ This means things like ( sleep 10 ) will only cause one fork.
+ If we're timing the command or inverting its return value, however,
+ we cannot do this optimization. */
+ if ((user_subshell || user_coproc) && (tcom->type == cm_simple || tcom->type == cm_subshell) &&
+ ((tcom->flags & CMD_TIME_PIPELINE) == 0) &&
+ ((tcom->flags & CMD_INVERT_RETURN) == 0))
+ {
+ tcom->flags |= CMD_NO_FORK;
+ if (tcom->type == cm_simple)
+ tcom->value.Simple->flags |= CMD_NO_FORK;
+ }
+
+ invert = (tcom->flags & CMD_INVERT_RETURN) != 0;
+ tcom->flags &= ~CMD_INVERT_RETURN;
+
+ result = setjmp_nosigs (top_level);
+
+ /* If we're inside a function while executing this subshell, we
+ need to handle a possible `return'. */
+ function_value = 0;
+ if (return_catch_flag)
+ function_value = setjmp_nosigs (return_catch);
+
+ /* If we're going to exit the shell, we don't want to invert the return
+ status. */
+ if (result == EXITPROG)
+ invert = 0, return_code = last_command_exit_value;
+ else if (result)
+ return_code = EXECUTION_FAILURE;
+ else if (function_value)
+ return_code = return_catch_value;
+ else
+ return_code = execute_command_internal ((COMMAND *)tcom, asynchronous, NO_PIPE, NO_PIPE, fds_to_close);
+
+ /* If we are asked to, invert the return value. */
+ if (invert)
+ return_code = (return_code == EXECUTION_SUCCESS) ? EXECUTION_FAILURE
+ : EXECUTION_SUCCESS;
+
+ /* If we were explicitly placed in a subshell with (), we need
+ to do the `shell cleanup' things, such as running traps[0]. */
+ if (user_subshell && signal_is_trapped (0))
+ {
+ last_command_exit_value = return_code;
+ return_code = run_exit_trap ();
+ }
+
+ subshell_level--;
+ return (return_code);
+ /* NOTREACHED */
+}
+
+#if defined (COPROCESS_SUPPORT)
+#define COPROC_MAX 16
+
+typedef struct cpelement
+ {
+ struct cpelement *next;
+ struct coproc *coproc;
+ }
+cpelement_t;
+
+typedef struct cplist
+ {
+ struct cpelement *head;
+ struct cpelement *tail;
+ int ncoproc;
+ int lock;
+ }
+cplist_t;
+
+static struct cpelement *cpe_alloc __P((struct coproc *));
+static void cpe_dispose __P((struct cpelement *));
+static struct cpelement *cpl_add __P((struct coproc *));
+static struct cpelement *cpl_delete __P((pid_t));
+static void cpl_reap __P((void));
+static void cpl_flush __P((void));
+static void cpl_closeall __P((void));
+static struct cpelement *cpl_search __P((pid_t));
+static struct cpelement *cpl_searchbyname __P((const char *));
+static void cpl_prune __P((void));
+
+static void coproc_free __P((struct coproc *));
+
+/* Will go away when there is fully-implemented support for multiple coprocs. */
+Coproc sh_coproc = { 0, NO_PID, -1, -1, 0, 0, 0, 0, 0 };
+
+cplist_t coproc_list = {0, 0, 0};
+
+/* Functions to manage the list of coprocs */
+
+static struct cpelement *
+cpe_alloc (cp)
+ Coproc *cp;
+{
+ struct cpelement *cpe;
+
+ cpe = (struct cpelement *)xmalloc (sizeof (struct cpelement));
+ cpe->coproc = cp;
+ cpe->next = (struct cpelement *)0;
+ return cpe;
+}
+
+static void
+cpe_dispose (cpe)
+ struct cpelement *cpe;
+{
+ free (cpe);
+}
+
+static struct cpelement *
+cpl_add (cp)
+ Coproc *cp;
+{
+ struct cpelement *cpe;
+
+ cpe = cpe_alloc (cp);
+
+ if (coproc_list.head == 0)
+ {
+ coproc_list.head = coproc_list.tail = cpe;
+ coproc_list.ncoproc = 0; /* just to make sure */
+ }
+ else
+ {
+ coproc_list.tail->next = cpe;
+ coproc_list.tail = cpe;
+ }
+ coproc_list.ncoproc++;
+
+ return cpe;
+}
+
+static struct cpelement *
+cpl_delete (pid)
+ pid_t pid;
+{
+ struct cpelement *prev, *p;
+
+ for (prev = p = coproc_list.head; p; prev = p, p = p->next)
+ if (p->coproc->c_pid == pid)
+ {
+ prev->next = p->next; /* remove from list */
+ break;
+ }
+
+ if (p == 0)
+ return 0; /* not found */
+
+#if defined (DEBUG)
+ itrace("cpl_delete: deleting %d", pid);
+#endif
+
+ /* Housekeeping in the border cases. */
+ if (p == coproc_list.head)
+ coproc_list.head = coproc_list.head->next;
+ else if (p == coproc_list.tail)
+ coproc_list.tail = prev;
+
+ coproc_list.ncoproc--;
+ if (coproc_list.ncoproc == 0)
+ coproc_list.head = coproc_list.tail = 0;
+ else if (coproc_list.ncoproc == 1)
+ coproc_list.tail = coproc_list.head; /* just to make sure */
+
+ return (p);
+}
+
+static void
+cpl_reap ()
+{
+ struct cpelement *p, *next, *nh, *nt;
+
+ /* Build a new list by removing dead coprocs and fix up the coproc_list
+ pointers when done. */
+ nh = nt = next = (struct cpelement *)0;
+ for (p = coproc_list.head; p; p = next)
+ {
+ next = p->next;
+ if (p->coproc->c_flags & COPROC_DEAD)
+ {
+ coproc_list.ncoproc--; /* keep running count, fix up pointers later */
+
+#if defined (DEBUG)
+ itrace("cpl_reap: deleting %d", p->coproc->c_pid);
+#endif
+
+ coproc_dispose (p->coproc);
+ cpe_dispose (p);
+ }
+ else if (nh == 0)
+ nh = nt = p;
+ else
+ {
+ nt->next = p;
+ nt = nt->next;
+ }
+ }
+
+ if (coproc_list.ncoproc == 0)
+ coproc_list.head = coproc_list.tail = 0;
+ else
+ {
+ if (nt)
+ nt->next = 0;
+ coproc_list.head = nh;
+ coproc_list.tail = nt;
+ if (coproc_list.ncoproc == 1)
+ coproc_list.tail = coproc_list.head; /* just to make sure */
+ }
+}
+
+/* Clear out the list of saved statuses */
+static void
+cpl_flush ()
+{
+ struct cpelement *cpe, *p;
+
+ for (cpe = coproc_list.head; cpe; )
+ {
+ p = cpe;
+ cpe = cpe->next;
+
+ coproc_dispose (p->coproc);
+ cpe_dispose (p);
+ }
+
+ coproc_list.head = coproc_list.tail = 0;
+ coproc_list.ncoproc = 0;
+}
+
+static void
+cpl_closeall ()
+{
+ struct cpelement *cpe;
+
+ for (cpe = coproc_list.head; cpe; cpe = cpe->next)
+ coproc_close (cpe->coproc);
+}
+
+static void
+cpl_fdchk (fd)
+ int fd;
+{
+ struct cpelement *cpe;
+
+ for (cpe = coproc_list.head; cpe; cpe = cpe->next)
+ coproc_checkfd (cpe->coproc, fd);
+}
+
+/* Search for PID in the list of coprocs; return the cpelement struct if
+ found. If not found, return NULL. */
+static struct cpelement *
+cpl_search (pid)
+ pid_t pid;
+{
+ struct cpelement *cpe;
+
+ for (cpe = coproc_list.head ; cpe; cpe = cpe->next)
+ if (cpe->coproc->c_pid == pid)
+ return cpe;
+ return (struct cpelement *)NULL;
+}
+
+/* Search for the coproc named NAME in the list of coprocs; return the
+ cpelement struct if found. If not found, return NULL. */
+static struct cpelement *
+cpl_searchbyname (name)
+ const char *name;
+{
+ struct cpelement *cp;
+
+ for (cp = coproc_list.head ; cp; cp = cp->next)
+ if (STREQ (cp->coproc->c_name, name))
+ return cp;
+ return (struct cpelement *)NULL;
+}
+
+#if 0
+static void
+cpl_prune ()
+{
+ struct cpelement *cp;
+
+ while (coproc_list.head && coproc_list.ncoproc > COPROC_MAX)
+ {
+ cp = coproc_list.head;
+ coproc_list.head = coproc_list.head->next;
+ coproc_dispose (cp->coproc);
+ cpe_dispose (cp);
+ coproc_list.ncoproc--;
+ }
+}
+#endif
+
+/* These currently use a single global "shell coproc" but are written in a
+ way to not preclude additional coprocs later (using the list management
+ package above). */
+
+struct coproc *
+getcoprocbypid (pid)
+ pid_t pid;
+{
+#if MULTIPLE_COPROCS
+ struct cpelement *p;
+
+ p = cpl_search (pid);
+ return (p ? p->coproc : 0);
+#else
+ return (pid == sh_coproc.c_pid ? &sh_coproc : 0);
+#endif
+}
+
+struct coproc *
+getcoprocbyname (name)
+ const char *name;
+{
+#if MULTIPLE_COPROCS
+ struct cpelement *p;
+
+ p = cpl_searchbyname (name);
+ return (p ? p->coproc : 0);
+#else
+ return ((sh_coproc.c_name && STREQ (sh_coproc.c_name, name)) ? &sh_coproc : 0);
+#endif
+}
+
+void
+coproc_init (cp)
+ struct coproc *cp;
+{
+ cp->c_name = 0;
+ cp->c_pid = NO_PID;
+ cp->c_rfd = cp->c_wfd = -1;
+ cp->c_rsave = cp->c_wsave = -1;
+ cp->c_flags = cp->c_status = cp->c_lock = 0;
+}
+
+struct coproc *
+coproc_alloc (name, pid)
+ char *name;
+ pid_t pid;
+{
+ struct coproc *cp;
+
+#if MULTIPLE_COPROCS
+ cp = (struct coproc *)xmalloc (sizeof (struct coproc));
+#else
+ cp = &sh_coproc;
+#endif
+ coproc_init (cp);
+ cp->c_lock = 2;
+
+ cp->c_pid = pid;
+ cp->c_name = savestring (name);
+#if MULTIPLE_COPROCS
+ cpl_add (cp);
+#endif
+ cp->c_lock = 0;
+ return (cp);
+}
+
+static void
+coproc_free (cp)
+ struct coproc *cp;
+{
+ free (cp);
+}
+
+void
+coproc_dispose (cp)
+ struct coproc *cp;
+{
+ sigset_t set, oset;
+
+ if (cp == 0)
+ return;
+
+ BLOCK_SIGNAL (SIGCHLD, set, oset);
+ cp->c_lock = 3;
+ coproc_unsetvars (cp);
+ FREE (cp->c_name);
+ coproc_close (cp);
+#if MULTIPLE_COPROCS
+ coproc_free (cp);
+#else
+ coproc_init (cp);
+ cp->c_lock = 0;
+#endif
+ UNBLOCK_SIGNAL (oset);
+}
+
+/* Placeholder for now. Will require changes for multiple coprocs */
+void
+coproc_flush ()
+{
+#if MULTIPLE_COPROCS
+ cpl_flush ();
+#else
+ coproc_dispose (&sh_coproc);
+#endif
+}
+
+void
+coproc_close (cp)
+ struct coproc *cp;
+{
+ if (cp->c_rfd >= 0)
+ {
+ close (cp->c_rfd);
+ cp->c_rfd = -1;
+ }
+ if (cp->c_wfd >= 0)
+ {
+ close (cp->c_wfd);
+ cp->c_wfd = -1;
+ }
+ cp->c_rsave = cp->c_wsave = -1;
+}
+
+void
+coproc_closeall ()
+{
+#if MULTIPLE_COPROCS
+ cpl_closeall ();
+#else
+ coproc_close (&sh_coproc); /* XXX - will require changes for multiple coprocs */
+#endif
+}
+
+void
+coproc_reap ()
+{
+#if MULTIPLE_COPROCS
+ cpl_reap ();
+#else
+ struct coproc *cp;
+
+ cp = &sh_coproc; /* XXX - will require changes for multiple coprocs */
+ if (cp && (cp->c_flags & COPROC_DEAD))
+ coproc_dispose (cp);
+#endif
+}
+
+void
+coproc_rclose (cp, fd)
+ struct coproc *cp;
+ int fd;
+{
+ if (cp->c_rfd >= 0 && cp->c_rfd == fd)
+ {
+ close (cp->c_rfd);
+ cp->c_rfd = -1;
+ }
+}
+
+void
+coproc_wclose (cp, fd)
+ struct coproc *cp;
+ int fd;
+{
+ if (cp->c_wfd >= 0 && cp->c_wfd == fd)
+ {
+ close (cp->c_wfd);
+ cp->c_wfd = -1;
+ }
+}
+
+void
+coproc_checkfd (cp, fd)
+ struct coproc *cp;
+ int fd;
+{
+ int update;
+
+ update = 0;
+ if (cp->c_rfd >= 0 && cp->c_rfd == fd)
+ update = cp->c_rfd = -1;
+ if (cp->c_wfd >= 0 && cp->c_wfd == fd)
+ update = cp->c_wfd = -1;
+ if (update)
+ coproc_setvars (cp);
+}
+
+void
+coproc_fdchk (fd)
+ int fd;
+{
+#if MULTIPLE_COPROCS
+ cpl_fdchk (fd);
+#else
+ coproc_checkfd (&sh_coproc, fd);
+#endif
+}
+
+void
+coproc_fdclose (cp, fd)
+ struct coproc *cp;
+ int fd;
+{
+ coproc_rclose (cp, fd);
+ coproc_wclose (cp, fd);
+ coproc_setvars (cp);
+}
+
+void
+coproc_fdsave (cp)
+ struct coproc *cp;
+{
+ cp->c_rsave = cp->c_rfd;
+ cp->c_wsave = cp->c_wfd;
+}
+
+void
+coproc_fdrestore (cp)
+ struct coproc *cp;
+{
+ cp->c_rfd = cp->c_rsave;
+ cp->c_wfd = cp->c_wsave;
+}
+
+void
+coproc_pidchk (pid, status)
+ pid_t pid;
+{
+ struct coproc *cp;
+
+#if MULTIPLE_COPROCS
+ struct cpelement *cpe;
+
+ cpe = cpl_delete (pid);
+ cp = cpe ? cpe->coproc : 0;
+#else
+ cp = getcoprocbypid (pid);
+#endif
+ if (cp)
+ {
+ cp->c_lock = 4;
+ cp->c_status = status;
+ cp->c_flags |= COPROC_DEAD;
+ cp->c_flags &= ~COPROC_RUNNING;
+ /* Don't dispose the coproc or unset the COPROC_XXX variables because
+ this is executed in a signal handler context. Wait until coproc_reap
+ takes care of it. */
+ cp->c_lock = 0;
+ }
+}
+
+void
+coproc_setvars (cp)
+ struct coproc *cp;
+{
+ SHELL_VAR *v;
+ char *namevar, *t;
+ int l;
+#if defined (ARRAY_VARS)
+ arrayind_t ind;
+#endif
+
+ if (cp->c_name == 0)
+ return;
+
+ l = strlen (cp->c_name);
+ namevar = xmalloc (l + 16);
+
+#if defined (ARRAY_VARS)
+ v = find_variable (cp->c_name);
+ if (v == 0)
+ v = make_new_array_variable (cp->c_name);
+ if (array_p (v) == 0)
+ v = convert_var_to_array (v);
+
+ t = itos (cp->c_rfd);
+ ind = 0;
+ v = bind_array_variable (cp->c_name, ind, t, 0);
+ free (t);
+
+ t = itos (cp->c_wfd);
+ ind = 1;
+ bind_array_variable (cp->c_name, ind, t, 0);
+ free (t);
+#else
+ sprintf (namevar, "%s_READ", cp->c_name);
+ t = itos (cp->c_rfd);
+ bind_variable (namevar, t, 0);
+ free (t);
+ sprintf (namevar, "%s_WRITE", cp->c_name);
+ t = itos (cp->c_wfd);
+ bind_variable (namevar, t, 0);
+ free (t);
+#endif
+
+ sprintf (namevar, "%s_PID", cp->c_name);
+ t = itos (cp->c_pid);
+ bind_variable (namevar, t, 0);
+ free (t);
+
+ free (namevar);
+}
+
+void
+coproc_unsetvars (cp)
+ struct coproc *cp;
+{
+ int l;
+ char *namevar;
+
+ if (cp->c_name == 0)
+ return;
+
+ l = strlen (cp->c_name);
+ namevar = xmalloc (l + 16);
+
+ sprintf (namevar, "%s_PID", cp->c_name);
+ unbind_variable (namevar);
+
+#if defined (ARRAY_VARS)
+ unbind_variable (cp->c_name);
+#else
+ sprintf (namevar, "%s_READ", cp->c_name);
+ unbind_variable (namevar);
+ sprintf (namevar, "%s_WRITE", cp->c_name);
+ unbind_variable (namevar);
+#endif
+
+ free (namevar);
+}
+
+static int
+execute_coproc (command, pipe_in, pipe_out, fds_to_close)
+ COMMAND *command;
+ int pipe_in, pipe_out;
+ struct fd_bitmap *fds_to_close;
+{
+ int rpipe[2], wpipe[2], estat, invert;
+ pid_t coproc_pid;
+ Coproc *cp;
+ char *tcmd;
+ sigset_t set, oset;
+
+ /* XXX -- can be removed after changes to handle multiple coprocs */
+#if !MULTIPLE_COPROCS
+ if (sh_coproc.c_pid != NO_PID)
+ internal_warning ("execute_coproc: coproc [%d:%s] still exists", sh_coproc.c_pid, sh_coproc.c_name);
+ coproc_init (&sh_coproc);
+#endif
+
+ invert = (command->flags & CMD_INVERT_RETURN) != 0;
+ command_string_index = 0;
+ tcmd = make_command_string (command);
+
+ sh_openpipe ((int *)&rpipe); /* 0 = parent read, 1 = child write */
+ sh_openpipe ((int *)&wpipe); /* 0 = child read, 1 = parent write */
+
+ BLOCK_SIGNAL (SIGCHLD, set, oset);
+
+ coproc_pid = make_child (savestring (tcmd), 1);
+
+ if (coproc_pid == 0)
+ {
+ close (rpipe[0]);
+ close (wpipe[1]);
+
+ UNBLOCK_SIGNAL (oset);
+ estat = execute_in_subshell (command, 1, wpipe[0], rpipe[1], fds_to_close);
+
+ fflush (stdout);
+ fflush (stderr);
+
+ exit (estat);
+ }
+
+ close (rpipe[1]);
+ close (wpipe[0]);
+
+ /* XXX - possibly run Coproc->name through word expansion? */
+ cp = coproc_alloc (command->value.Coproc->name, coproc_pid);
+ cp->c_rfd = rpipe[0];
+ cp->c_wfd = wpipe[1];
+
+ SET_CLOSE_ON_EXEC (cp->c_rfd);
+ SET_CLOSE_ON_EXEC (cp->c_wfd);
+
+ coproc_setvars (cp);
+
+ UNBLOCK_SIGNAL (oset);
+
+#if 0
+ itrace ("execute_coproc: [%d] %s", coproc_pid, the_printed_command);
+#endif
+
+ close_pipes (pipe_in, pipe_out);
+#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
+ unlink_fifo_list ();
+#endif
+ stop_pipeline (1, (COMMAND *)NULL);
+ DESCRIBE_PID (coproc_pid);
+ run_pending_traps ();
+
+ return (invert ? EXECUTION_FAILURE : EXECUTION_SUCCESS);
+}
+#endif
+
+static void
+restore_stdin (s)
+ int s;
+{
+ dup2 (s, 0);
+ close (s);
+}
+
+/* Catch-all cleanup function for lastpipe code for unwind-protects */
+static void
+lastpipe_cleanup (s)
+ int s;
+{
+ unfreeze_jobs_list ();
+}
+
+static int
+execute_pipeline (command, asynchronous, pipe_in, pipe_out, fds_to_close)
+ COMMAND *command;
+ int asynchronous, pipe_in, pipe_out;
+ struct fd_bitmap *fds_to_close;
+{
+ int prev, fildes[2], new_bitmap_size, dummyfd, ignore_return, exec_result;
+ int lstdin, lastpipe_flag, lastpipe_jid;
+ COMMAND *cmd;
+ struct fd_bitmap *fd_bitmap;
+ pid_t lastpid;
+
+#if defined (JOB_CONTROL)
+ sigset_t set, oset;
+ BLOCK_CHILD (set, oset);
+#endif /* JOB_CONTROL */
+
+ ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
+
+ prev = pipe_in;
+ cmd = command;
+
+ while (cmd && cmd->type == cm_connection &&
+ cmd->value.Connection && cmd->value.Connection->connector == '|')
+ {
+ /* Make a pipeline between the two commands. */
+ if (pipe (fildes) < 0)
+ {
+ sys_error (_("pipe error"));
+#if defined (JOB_CONTROL)
+ terminate_current_pipeline ();
+ kill_current_pipeline ();
+ UNBLOCK_CHILD (oset);
+#endif /* JOB_CONTROL */
+ last_command_exit_value = EXECUTION_FAILURE;
+ /* The unwind-protects installed below will take care
+ of closing all of the open file descriptors. */
+ throw_to_top_level ();
+ return (EXECUTION_FAILURE); /* XXX */
+ }
+
+ /* Here is a problem: with the new file close-on-exec
+ code, the read end of the pipe (fildes[0]) stays open
+ in the first process, so that process will never get a
+ SIGPIPE. There is no way to signal the first process
+ that it should close fildes[0] after forking, so it
+ remains open. No SIGPIPE is ever sent because there
+ is still a file descriptor open for reading connected
+ to the pipe. We take care of that here. This passes
+ around a bitmap of file descriptors that must be
+ closed after making a child process in execute_simple_command. */
+
+ /* We need fd_bitmap to be at least as big as fildes[0].
+ If fildes[0] is less than fds_to_close->size, then
+ use fds_to_close->size. */
+ new_bitmap_size = (fildes[0] < fds_to_close->size)
+ ? fds_to_close->size
+ : fildes[0] + 8;
+
+ fd_bitmap = new_fd_bitmap (new_bitmap_size);
+
+ /* Now copy the old information into the new bitmap. */
+ xbcopy ((char *)fds_to_close->bitmap, (char *)fd_bitmap->bitmap, fds_to_close->size);
+
+ /* And mark the pipe file descriptors to be closed. */
+ fd_bitmap->bitmap[fildes[0]] = 1;
+
+ /* In case there are pipe or out-of-processes errors, we
+ want all these file descriptors to be closed when
+ unwind-protects are run, and the storage used for the
+ bitmaps freed up. */
+ begin_unwind_frame ("pipe-file-descriptors");
+ add_unwind_protect (dispose_fd_bitmap, fd_bitmap);
+ add_unwind_protect (close_fd_bitmap, fd_bitmap);
+ if (prev >= 0)
+ add_unwind_protect (close, prev);
+ dummyfd = fildes[1];
+ add_unwind_protect (close, dummyfd);
+
+#if defined (JOB_CONTROL)
+ add_unwind_protect (restore_signal_mask, &oset);
+#endif /* JOB_CONTROL */
+
+ if (ignore_return && cmd->value.Connection->first)
+ cmd->value.Connection->first->flags |= CMD_IGNORE_RETURN;
+ execute_command_internal (cmd->value.Connection->first, asynchronous,
+ prev, fildes[1], fd_bitmap);
+
+ if (prev >= 0)
+ close (prev);
+
+ prev = fildes[0];
+ close (fildes[1]);
+
+ dispose_fd_bitmap (fd_bitmap);
+ discard_unwind_frame ("pipe-file-descriptors");
+
+ cmd = cmd->value.Connection->second;
+ }
+
+ lastpid = last_made_pid;
+
+ /* Now execute the rightmost command in the pipeline. */
+ if (ignore_return && cmd)
+ cmd->flags |= CMD_IGNORE_RETURN;
+
+ lastpipe_flag = 0;
+
+ begin_unwind_frame ("lastpipe-exec");
+ lstdin = -1;
+ /* If the `lastpipe' option is set with shopt, and job control is not
+ enabled, execute the last element of non-async pipelines in the
+ current shell environment. */
+ if (lastpipe_opt && job_control == 0 && asynchronous == 0 && pipe_out == NO_PIPE && prev > 0)
+ {
+ lstdin = move_to_high_fd (0, 1, -1);
+ if (lstdin > 0)
+ {
+ do_piping (prev, pipe_out);
+ prev = NO_PIPE;
+ add_unwind_protect (restore_stdin, lstdin);
+ lastpipe_flag = 1;
+ freeze_jobs_list ();
+ lastpipe_jid = stop_pipeline (0, (COMMAND *)NULL); /* XXX */
+ add_unwind_protect (lastpipe_cleanup, lastpipe_jid);
+ }
+ if (cmd)
+ cmd->flags |= CMD_LASTPIPE;
+ }
+ if (prev >= 0)
+ add_unwind_protect (close, prev);
+
+ exec_result = execute_command_internal (cmd, asynchronous, prev, pipe_out, fds_to_close);
+
+ if (lstdin > 0)
+ restore_stdin (lstdin);
+
+ if (prev >= 0)
+ close (prev);
+
+#if defined (JOB_CONTROL)
+ UNBLOCK_CHILD (oset);
+#endif
+
+ QUIT;
+
+ if (lastpipe_flag)
+ {
+#if defined (JOB_CONTROL)
+ append_process (savestring (the_printed_command), dollar_dollar_pid, exec_result, lastpipe_jid);
+#endif
+ lstdin = wait_for (lastpid);
+#if defined (JOB_CONTROL)
+ exec_result = job_exit_status (lastpipe_jid);
+#endif
+ unfreeze_jobs_list ();
+ }
+
+ discard_unwind_frame ("lastpipe-exec");
+
+ return (exec_result);
+}
+
+static int
+execute_connection (command, asynchronous, pipe_in, pipe_out, fds_to_close)
+ COMMAND *command;
+ int asynchronous, pipe_in, pipe_out;
+ struct fd_bitmap *fds_to_close;
+{
+ COMMAND *tc, *second;
+ int ignore_return, exec_result, was_error_trap, invert;
+ volatile int save_line_number;
+
+ ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
+
+ switch (command->value.Connection->connector)
+ {
+ /* Do the first command asynchronously. */
+ case '&':
+ tc = command->value.Connection->first;
+ if (tc == 0)
+ return (EXECUTION_SUCCESS);
+
+ if (ignore_return)
+ tc->flags |= CMD_IGNORE_RETURN;
+ tc->flags |= CMD_AMPERSAND;
+
+ /* If this shell was compiled without job control support,
+ if we are currently in a subshell via `( xxx )', or if job
+ control is not active then the standard input for an
+ asynchronous command is forced to /dev/null. */
+#if defined (JOB_CONTROL)
+ if ((subshell_environment || !job_control) && !stdin_redir)
+#else
+ if (!stdin_redir)
+#endif /* JOB_CONTROL */
+ tc->flags |= CMD_STDIN_REDIR;
+
+ exec_result = execute_command_internal (tc, 1, pipe_in, pipe_out, fds_to_close);
+ QUIT;
+
+ if (tc->flags & CMD_STDIN_REDIR)
+ tc->flags &= ~CMD_STDIN_REDIR;
+
+ second = command->value.Connection->second;
+ if (second)
+ {
+ if (ignore_return)
+ second->flags |= CMD_IGNORE_RETURN;
+
+ exec_result = execute_command_internal (second, asynchronous, pipe_in, pipe_out, fds_to_close);
+ }
+
+ break;
+
+ /* Just call execute command on both sides. */
+ case ';':
+ if (ignore_return)
+ {
+ if (command->value.Connection->first)
+ command->value.Connection->first->flags |= CMD_IGNORE_RETURN;
+ if (command->value.Connection->second)
+ command->value.Connection->second->flags |= CMD_IGNORE_RETURN;
+ }
+ executing_list++;
+ QUIT;
+ execute_command (command->value.Connection->first);
+ QUIT;
+ exec_result = execute_command_internal (command->value.Connection->second,
+ asynchronous, pipe_in, pipe_out,
+ fds_to_close);
+ executing_list--;
+ break;
+
+ case '|':
+ was_error_trap = signal_is_trapped (ERROR_TRAP) && signal_is_ignored (ERROR_TRAP) == 0;
+ invert = (command->flags & CMD_INVERT_RETURN) != 0;
+ ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
+
+ line_number_for_err_trap = line_number;
+ exec_result = execute_pipeline (command, asynchronous, pipe_in, pipe_out, fds_to_close);
+
+ if (was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS)
+ {
+ last_command_exit_value = exec_result;
+ save_line_number = line_number;
+ line_number = line_number_for_err_trap;
+ run_error_trap ();
+ line_number = save_line_number;
+ }
+
+ if (ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS)
+ {
+ last_command_exit_value = exec_result;
+ run_pending_traps ();
+ jump_to_top_level (ERREXIT);
+ }
+
+ break;
+
+ case AND_AND:
+ case OR_OR:
+ if (asynchronous)
+ {
+ /* If we have something like `a && b &' or `a || b &', run the
+ && or || stuff in a subshell. Force a subshell and just call
+ execute_command_internal again. Leave asynchronous on
+ so that we get a report from the parent shell about the
+ background job. */
+ command->flags |= CMD_FORCE_SUBSHELL;
+ exec_result = execute_command_internal (command, 1, pipe_in, pipe_out, fds_to_close);
+ break;
+ }
+
+ /* Execute the first command. If the result of that is successful
+ and the connector is AND_AND, or the result is not successful
+ and the connector is OR_OR, then execute the second command,
+ otherwise return. */
+
+ executing_list++;
+ if (command->value.Connection->first)
+ command->value.Connection->first->flags |= CMD_IGNORE_RETURN;
+
+ exec_result = execute_command (command->value.Connection->first);
+ QUIT;
+ if (((command->value.Connection->connector == AND_AND) &&
+ (exec_result == EXECUTION_SUCCESS)) ||
+ ((command->value.Connection->connector == OR_OR) &&
+ (exec_result != EXECUTION_SUCCESS)))
+ {
+ if (ignore_return && command->value.Connection->second)
+ command->value.Connection->second->flags |= CMD_IGNORE_RETURN;
+
+ exec_result = execute_command (command->value.Connection->second);
+ }
+ executing_list--;
+ break;
+
+ default:
+ command_error ("execute_connection", CMDERR_BADCONN, command->value.Connection->connector, 0);
+ jump_to_top_level (DISCARD);
+ exec_result = EXECUTION_FAILURE;
+ }
+
+ return exec_result;
+}
+
+#define REAP() \
+ do \
+ { \
+ if (!interactive_shell) \
+ reap_dead_jobs (); \
+ } \
+ while (0)
+
+/* Execute a FOR command. The syntax is: FOR word_desc IN word_list;
+ DO command; DONE */
+static int
+execute_for_command (for_command)
+ FOR_COM *for_command;
+{
+ register WORD_LIST *releaser, *list;
+ SHELL_VAR *v;
+ char *identifier;
+ int retval, save_line_number;
+#if 0
+ SHELL_VAR *old_value = (SHELL_VAR *)NULL; /* Remember the old value of x. */
+#endif
+
+ save_line_number = line_number;
+ if (check_identifier (for_command->name, 1) == 0)
+ {
+ if (posixly_correct && interactive_shell == 0)
+ {
+ last_command_exit_value = EX_BADUSAGE;
+ jump_to_top_level (ERREXIT);
+ }
+ return (EXECUTION_FAILURE);
+ }
+
+ loop_level++;
+ identifier = for_command->name->word;
+
+ list = releaser = expand_words_no_vars (for_command->map_list);
+
+ begin_unwind_frame ("for");
+ add_unwind_protect (dispose_words, releaser);
+
+#if 0
+ if (lexical_scoping)
+ {
+ old_value = copy_variable (find_variable (identifier));
+ if (old_value)
+ add_unwind_protect (dispose_variable, old_value);
+ }
+#endif
+
+ if (for_command->flags & CMD_IGNORE_RETURN)
+ for_command->action->flags |= CMD_IGNORE_RETURN;
+
+ for (retval = EXECUTION_SUCCESS; list; list = list->next)
+ {
+ QUIT;
+
+ line_number = for_command->line;
+
+ /* Remember what this command looks like, for debugger. */
+ command_string_index = 0;
+ print_for_command_head (for_command);
+
+ if (echo_command_at_execute)
+ xtrace_print_for_command_head (for_command);
+
+ /* Save this command unless it's a trap command and we're not running
+ a debug trap. */
+ if (signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0)
+ {
+ FREE (the_printed_command_except_trap);
+ the_printed_command_except_trap = savestring (the_printed_command);
+ }
+
+ retval = run_debug_trap ();
+#if defined (DEBUGGER)
+ /* In debugging mode, if the DEBUG trap returns a non-zero status, we
+ skip the command. */
+ if (debugging_mode && retval != EXECUTION_SUCCESS)
+ continue;
+#endif
+
+ this_command_name = (char *)NULL;
+ /* XXX - special ksh93 for command index variable handling */
+ v = find_variable_last_nameref (identifier);
+ if (v && nameref_p (v))
+ {
+ v = bind_variable_value (v, list->word->word, 0);
+ }
+ else
+ v = bind_variable (identifier, list->word->word, 0);
+ if (readonly_p (v) || noassign_p (v))
+ {
+ line_number = save_line_number;
+ if (readonly_p (v) && interactive_shell == 0 && posixly_correct)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ jump_to_top_level (FORCE_EOF);
+ }
+ else
+ {
+ dispose_words (releaser);
+ discard_unwind_frame ("for");
+ loop_level--;
+ return (EXECUTION_FAILURE);
+ }
+ }
+ retval = execute_command (for_command->action);
+ REAP ();
+ QUIT;
+
+ if (breaking)
+ {
+ breaking--;
+ break;
+ }
+
+ if (continuing)
+ {
+ continuing--;
+ if (continuing)
+ break;
+ }
+ }
+
+ loop_level--;
+ line_number = save_line_number;
+
+#if 0
+ if (lexical_scoping)
+ {
+ if (!old_value)
+ unbind_variable (identifier);
+ else
+ {
+ SHELL_VAR *new_value;
+
+ new_value = bind_variable (identifier, value_cell(old_value), 0);
+ new_value->attributes = old_value->attributes;
+ dispose_variable (old_value);
+ }
+ }
+#endif
+
+ dispose_words (releaser);
+ discard_unwind_frame ("for");
+ return (retval);
+}
+
+#if defined (ARITH_FOR_COMMAND)
+/* Execute an arithmetic for command. The syntax is
+
+ for (( init ; step ; test ))
+ do
+ body
+ done
+
+ The execution should be exactly equivalent to
+
+ eval \(\( init \)\)
+ while eval \(\( test \)\) ; do
+ body;
+ eval \(\( step \)\)
+ done
+*/
+static intmax_t
+eval_arith_for_expr (l, okp)
+ WORD_LIST *l;
+ int *okp;
+{
+ WORD_LIST *new;
+ intmax_t expresult;
+ int r;
+
+ new = expand_words_no_vars (l);
+ if (new)
+ {
+ if (echo_command_at_execute)
+ xtrace_print_arith_cmd (new);
+ this_command_name = "(("; /* )) for expression error messages */
+
+ command_string_index = 0;
+ print_arith_command (new);
+ if (signal_in_progress (DEBUG_TRAP) == 0)
+ {
+ FREE (the_printed_command_except_trap);
+ the_printed_command_except_trap = savestring (the_printed_command);
+ }
+
+ r = run_debug_trap ();
+ /* In debugging mode, if the DEBUG trap returns a non-zero status, we
+ skip the command. */
+#if defined (DEBUGGER)
+ if (debugging_mode == 0 || r == EXECUTION_SUCCESS)
+ expresult = evalexp (new->word->word, okp);
+ else
+ {
+ expresult = 0;
+ if (okp)
+ *okp = 1;
+ }
+#else
+ expresult = evalexp (new->word->word, okp);
+#endif
+ dispose_words (new);
+ }
+ else
+ {
+ expresult = 0;
+ if (okp)
+ *okp = 1;
+ }
+ return (expresult);
+}
+
+static int
+execute_arith_for_command (arith_for_command)
+ ARITH_FOR_COM *arith_for_command;
+{
+ intmax_t expresult;
+ int expok, body_status, arith_lineno, save_lineno;
+
+ body_status = EXECUTION_SUCCESS;
+ loop_level++;
+ save_lineno = line_number;
+
+ if (arith_for_command->flags & CMD_IGNORE_RETURN)
+ arith_for_command->action->flags |= CMD_IGNORE_RETURN;
+
+ this_command_name = "(("; /* )) for expression error messages */
+
+ /* save the starting line number of the command so we can reset
+ line_number before executing each expression -- for $LINENO
+ and the DEBUG trap. */
+ line_number = arith_lineno = arith_for_command->line;
+ if (variable_context && interactive_shell)
+ line_number -= function_line_number;
+
+ /* Evaluate the initialization expression. */
+ expresult = eval_arith_for_expr (arith_for_command->init, &expok);
+ if (expok == 0)
+ {
+ line_number = save_lineno;
+ return (EXECUTION_FAILURE);
+ }
+
+ while (1)
+ {
+ /* Evaluate the test expression. */
+ line_number = arith_lineno;
+ expresult = eval_arith_for_expr (arith_for_command->test, &expok);
+ line_number = save_lineno;
+
+ if (expok == 0)
+ {
+ body_status = EXECUTION_FAILURE;
+ break;
+ }
+ REAP ();
+ if (expresult == 0)
+ break;
+
+ /* Execute the body of the arithmetic for command. */
+ QUIT;
+ body_status = execute_command (arith_for_command->action);
+ QUIT;
+
+ /* Handle any `break' or `continue' commands executed by the body. */
+ if (breaking)
+ {
+ breaking--;
+ break;
+ }
+
+ if (continuing)
+ {
+ continuing--;
+ if (continuing)
+ break;
+ }
+
+ /* Evaluate the step expression. */
+ line_number = arith_lineno;
+ expresult = eval_arith_for_expr (arith_for_command->step, &expok);
+ line_number = save_lineno;
+
+ if (expok == 0)
+ {
+ body_status = EXECUTION_FAILURE;
+ break;
+ }
+ }
+
+ loop_level--;
+ line_number = save_lineno;
+
+ return (body_status);
+}
+#endif
+
+#if defined (SELECT_COMMAND)
+static int LINES, COLS, tabsize;
+
+#define RP_SPACE ") "
+#define RP_SPACE_LEN 2
+
+/* XXX - does not handle numbers > 1000000 at all. */
+#define NUMBER_LEN(s) \
+((s < 10) ? 1 \
+ : ((s < 100) ? 2 \
+ : ((s < 1000) ? 3 \
+ : ((s < 10000) ? 4 \
+ : ((s < 100000) ? 5 \
+ : 6)))))
+
+static int
+displen (s)
+ const char *s;
+{
+#if defined (HANDLE_MULTIBYTE)
+ wchar_t *wcstr;
+ size_t slen;
+ int wclen;
+
+ wcstr = 0;
+ slen = mbstowcs (wcstr, s, 0);
+ if (slen == -1)
+ slen = 0;
+ wcstr = (wchar_t *)xmalloc (sizeof (wchar_t) * (slen + 1));
+ mbstowcs (wcstr, s, slen + 1);
+ wclen = wcswidth (wcstr, slen);
+ free (wcstr);
+ return (wclen < 0 ? STRLEN(s) : wclen);
+#else
+ return (STRLEN (s));
+#endif
+}
+
+static int
+print_index_and_element (len, ind, list)
+ int len, ind;
+ WORD_LIST *list;
+{
+ register WORD_LIST *l;
+ register int i;
+
+ if (list == 0)
+ return (0);
+ for (i = ind, l = list; l && --i; l = l->next)
+ ;
+ if (l == 0) /* don't think this can happen */
+ return (0);
+ fprintf (stderr, "%*d%s%s", len, ind, RP_SPACE, l->word->word);
+ return (displen (l->word->word));
+}
+
+static void
+indent (from, to)
+ int from, to;
+{
+ while (from < to)
+ {
+ if ((to / tabsize) > (from / tabsize))
+ {
+ putc ('\t', stderr);
+ from += tabsize - from % tabsize;
+ }
+ else
+ {
+ putc (' ', stderr);
+ from++;
+ }
+ }
+}
+
+static void
+print_select_list (list, list_len, max_elem_len, indices_len)
+ WORD_LIST *list;
+ int list_len, max_elem_len, indices_len;
+{
+ int ind, row, elem_len, pos, cols, rows;
+ int first_column_indices_len, other_indices_len;
+
+ if (list == 0)
+ {
+ putc ('\n', stderr);
+ return;
+ }
+
+ cols = max_elem_len ? COLS / max_elem_len : 1;
+ if (cols == 0)
+ cols = 1;
+ rows = list_len ? list_len / cols + (list_len % cols != 0) : 1;
+ cols = list_len ? list_len / rows + (list_len % rows != 0) : 1;
+
+ if (rows == 1)
+ {
+ rows = cols;
+ cols = 1;
+ }
+
+ first_column_indices_len = NUMBER_LEN (rows);
+ other_indices_len = indices_len;
+
+ for (row = 0; row < rows; row++)
+ {
+ ind = row;
+ pos = 0;
+ while (1)
+ {
+ indices_len = (pos == 0) ? first_column_indices_len : other_indices_len;
+ elem_len = print_index_and_element (indices_len, ind + 1, list);
+ elem_len += indices_len + RP_SPACE_LEN;
+ ind += rows;
+ if (ind >= list_len)
+ break;
+ indent (pos + elem_len, pos + max_elem_len);
+ pos += max_elem_len;
+ }
+ putc ('\n', stderr);
+ }
+}
+
+/* Print the elements of LIST, one per line, preceded by an index from 1 to
+ LIST_LEN. Then display PROMPT and wait for the user to enter a number.
+ If the number is between 1 and LIST_LEN, return that selection. If EOF
+ is read, return a null string. If a blank line is entered, or an invalid
+ number is entered, the loop is executed again. */
+static char *
+select_query (list, list_len, prompt, print_menu)
+ WORD_LIST *list;
+ int list_len;
+ char *prompt;
+ int print_menu;
+{
+ int max_elem_len, indices_len, len;
+ intmax_t reply;
+ WORD_LIST *l;
+ char *repl_string, *t;
+
+#if 0
+ t = get_string_value ("LINES");
+ LINES = (t && *t) ? atoi (t) : 24;
+#endif
+ t = get_string_value ("COLUMNS");
+ COLS = (t && *t) ? atoi (t) : 80;
+
+#if 0
+ t = get_string_value ("TABSIZE");
+ tabsize = (t && *t) ? atoi (t) : 8;
+ if (tabsize <= 0)
+ tabsize = 8;
+#else
+ tabsize = 8;
+#endif
+
+ max_elem_len = 0;
+ for (l = list; l; l = l->next)
+ {
+ len = displen (l->word->word);
+ if (len > max_elem_len)
+ max_elem_len = len;
+ }
+ indices_len = NUMBER_LEN (list_len);
+ max_elem_len += indices_len + RP_SPACE_LEN + 2;
+
+ while (1)
+ {
+ if (print_menu)
+ print_select_list (list, list_len, max_elem_len, indices_len);
+ fprintf (stderr, "%s", prompt);
+ fflush (stderr);
+ QUIT;
+
+ if (read_builtin ((WORD_LIST *)NULL) != EXECUTION_SUCCESS)
+ {
+ putchar ('\n');
+ return ((char *)NULL);
+ }
+ repl_string = get_string_value ("REPLY");
+ if (*repl_string == 0)
+ {
+ print_menu = 1;
+ continue;
+ }
+ if (legal_number (repl_string, &reply) == 0)
+ return "";
+ if (reply < 1 || reply > list_len)
+ return "";
+
+ for (l = list; l && --reply; l = l->next)
+ ;
+ return (l->word->word); /* XXX - can't be null? */
+ }
+}
+
+/* Execute a SELECT command. The syntax is:
+ SELECT word IN list DO command_list DONE
+ Only `break' or `return' in command_list will terminate
+ the command. */
+static int
+execute_select_command (select_command)
+ SELECT_COM *select_command;
+{
+ WORD_LIST *releaser, *list;
+ SHELL_VAR *v;
+ char *identifier, *ps3_prompt, *selection;
+ int retval, list_len, show_menu, save_line_number;
+
+ if (check_identifier (select_command->name, 1) == 0)
+ return (EXECUTION_FAILURE);
+
+ save_line_number = line_number;
+ line_number = select_command->line;
+
+ command_string_index = 0;
+ print_select_command_head (select_command);
+
+ if (echo_command_at_execute)
+ xtrace_print_select_command_head (select_command);
+
+#if 0
+ if (signal_in_progress (DEBUG_TRAP) == 0 && (this_command_name == 0 || (STREQ (this_command_name, "trap") == 0)))
+#else
+ if (signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0)
+#endif
+ {
+ FREE (the_printed_command_except_trap);
+ the_printed_command_except_trap = savestring (the_printed_command);
+ }
+
+ retval = run_debug_trap ();
+#if defined (DEBUGGER)
+ /* In debugging mode, if the DEBUG trap returns a non-zero status, we
+ skip the command. */
+ if (debugging_mode && retval != EXECUTION_SUCCESS)
+ return (EXECUTION_SUCCESS);
+#endif
+
+ loop_level++;
+ identifier = select_command->name->word;
+
+ /* command and arithmetic substitution, parameter and variable expansion,
+ word splitting, pathname expansion, and quote removal. */
+ list = releaser = expand_words_no_vars (select_command->map_list);
+ list_len = list_length (list);
+ if (list == 0 || list_len == 0)
+ {
+ if (list)
+ dispose_words (list);
+ line_number = save_line_number;
+ return (EXECUTION_SUCCESS);
+ }
+
+ begin_unwind_frame ("select");
+ add_unwind_protect (dispose_words, releaser);
+
+ if (select_command->flags & CMD_IGNORE_RETURN)
+ select_command->action->flags |= CMD_IGNORE_RETURN;
+
+ retval = EXECUTION_SUCCESS;
+ show_menu = 1;
+
+ while (1)
+ {
+ line_number = select_command->line;
+ ps3_prompt = get_string_value ("PS3");
+ if (ps3_prompt == 0)
+ ps3_prompt = "#? ";
+
+ QUIT;
+ selection = select_query (list, list_len, ps3_prompt, show_menu);
+ QUIT;
+ if (selection == 0)
+ {
+ /* select_query returns EXECUTION_FAILURE if the read builtin
+ fails, so we want to return failure in this case. */
+ retval = EXECUTION_FAILURE;
+ break;
+ }
+
+ v = bind_variable (identifier, selection, 0);
+ if (readonly_p (v) || noassign_p (v))
+ {
+ if (readonly_p (v) && interactive_shell == 0 && posixly_correct)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ jump_to_top_level (FORCE_EOF);
+ }
+ else
+ {
+ dispose_words (releaser);
+ discard_unwind_frame ("select");
+ loop_level--;
+ line_number = save_line_number;
+ return (EXECUTION_FAILURE);
+ }
+ }
+
+ retval = execute_command (select_command->action);
+
+ REAP ();
+ QUIT;
+
+ if (breaking)
+ {
+ breaking--;
+ break;
+ }
+
+ if (continuing)
+ {
+ continuing--;
+ if (continuing)
+ break;
+ }
+
+#if defined (KSH_COMPATIBLE_SELECT)
+ show_menu = 0;
+ selection = get_string_value ("REPLY");
+ if (selection && *selection == '\0')
+ show_menu = 1;
+#endif
+ }
+
+ loop_level--;
+ line_number = save_line_number;
+
+ dispose_words (releaser);
+ discard_unwind_frame ("select");
+ return (retval);
+}
+#endif /* SELECT_COMMAND */
+
+/* Execute a CASE command. The syntax is: CASE word_desc IN pattern_list ESAC.
+ The pattern_list is a linked list of pattern clauses; each clause contains
+ some patterns to compare word_desc against, and an associated command to
+ execute. */
+static int
+execute_case_command (case_command)
+ CASE_COM *case_command;
+{
+ register WORD_LIST *list;
+ WORD_LIST *wlist, *es;
+ PATTERN_LIST *clauses;
+ char *word, *pattern;
+ int retval, match, ignore_return, save_line_number;
+
+ save_line_number = line_number;
+ line_number = case_command->line;
+
+ command_string_index = 0;
+ print_case_command_head (case_command);
+
+ if (echo_command_at_execute)
+ xtrace_print_case_command_head (case_command);
+
+#if 0
+ if (signal_in_progress (DEBUG_TRAP) == 0 && (this_command_name == 0 || (STREQ (this_command_name, "trap") == 0)))
+#else
+ if (signal_in_progress (DEBUG_TRAP) == 0 && running_trap == 0)
+#endif
+ {
+ FREE (the_printed_command_except_trap);
+ the_printed_command_except_trap = savestring (the_printed_command);
+ }
+
+ retval = run_debug_trap();
+#if defined (DEBUGGER)
+ /* In debugging mode, if the DEBUG trap returns a non-zero status, we
+ skip the command. */
+ if (debugging_mode && retval != EXECUTION_SUCCESS)
+ {
+ line_number = save_line_number;
+ return (EXECUTION_SUCCESS);
+ }
+#endif
+
+ wlist = expand_word_unsplit (case_command->word, 0);
+ word = wlist ? string_list (wlist) : savestring ("");
+ dispose_words (wlist);
+
+ retval = EXECUTION_SUCCESS;
+ ignore_return = case_command->flags & CMD_IGNORE_RETURN;
+
+ begin_unwind_frame ("case");
+ add_unwind_protect ((Function *)xfree, word);
+
+#define EXIT_CASE() goto exit_case_command
+
+ for (clauses = case_command->clauses; clauses; clauses = clauses->next)
+ {
+ QUIT;
+ for (list = clauses->patterns; list; list = list->next)
+ {
+ es = expand_word_leave_quoted (list->word, 0);
+
+ if (es && es->word && es->word->word && *(es->word->word))
+ pattern = quote_string_for_globbing (es->word->word, QGLOB_CVTNULL);
+ else
+ {
+ pattern = (char *)xmalloc (1);
+ pattern[0] = '\0';
+ }
+
+ /* Since the pattern does not undergo quote removal (as per
+ Posix.2, section 3.9.4.3), the strmatch () call must be able
+ to recognize backslashes as escape characters. */
+ match = strmatch (pattern, word, FNMATCH_EXTFLAG|FNMATCH_IGNCASE) != FNM_NOMATCH;
+ free (pattern);
+
+ dispose_words (es);
+
+ if (match)
+ {
+ do
+ {
+ if (clauses->action && ignore_return)
+ clauses->action->flags |= CMD_IGNORE_RETURN;
+ retval = execute_command (clauses->action);
+ }
+ while ((clauses->flags & CASEPAT_FALLTHROUGH) && (clauses = clauses->next));
+ if (clauses == 0 || (clauses->flags & CASEPAT_TESTNEXT) == 0)
+ EXIT_CASE ();
+ else
+ break;
+ }
+
+ QUIT;
+ }
+ }
+
+exit_case_command:
+ free (word);
+ discard_unwind_frame ("case");
+ line_number = save_line_number;
+ return (retval);
+}
+
+#define CMD_WHILE 0
+#define CMD_UNTIL 1
+
+/* The WHILE command. Syntax: WHILE test DO action; DONE.
+ Repeatedly execute action while executing test produces
+ EXECUTION_SUCCESS. */
+static int
+execute_while_command (while_command)
+ WHILE_COM *while_command;
+{
+ return (execute_while_or_until (while_command, CMD_WHILE));
+}
+
+/* UNTIL is just like WHILE except that the test result is negated. */
+static int
+execute_until_command (while_command)
+ WHILE_COM *while_command;
+{
+ return (execute_while_or_until (while_command, CMD_UNTIL));
+}
+
+/* The body for both while and until. The only difference between the
+ two is that the test value is treated differently. TYPE is
+ CMD_WHILE or CMD_UNTIL. The return value for both commands should
+ be EXECUTION_SUCCESS if no commands in the body are executed, and
+ the status of the last command executed in the body otherwise. */
+static int
+execute_while_or_until (while_command, type)
+ WHILE_COM *while_command;
+ int type;
+{
+ int return_value, body_status;
+
+ body_status = EXECUTION_SUCCESS;
+ loop_level++;
+
+ while_command->test->flags |= CMD_IGNORE_RETURN;
+ if (while_command->flags & CMD_IGNORE_RETURN)
+ while_command->action->flags |= CMD_IGNORE_RETURN;
+
+ while (1)
+ {
+ return_value = execute_command (while_command->test);
+ REAP ();
+
+ /* Need to handle `break' in the test when we would break out of the
+ loop. The job control code will set `breaking' to loop_level
+ when a job in a loop is stopped with SIGTSTP. If the stopped job
+ is in the loop test, `breaking' will not be reset unless we do
+ this, and the shell will cease to execute commands. */
+ if (type == CMD_WHILE && return_value != EXECUTION_SUCCESS)
+ {
+ if (breaking)
+ breaking--;
+ break;
+ }
+ if (type == CMD_UNTIL && return_value == EXECUTION_SUCCESS)
+ {
+ if (breaking)
+ breaking--;
+ break;
+ }
+
+ QUIT;
+ body_status = execute_command (while_command->action);
+ QUIT;
+
+ if (breaking)
+ {
+ breaking--;
+ break;
+ }
+
+ if (continuing)
+ {
+ continuing--;
+ if (continuing)
+ break;
+ }
+ }
+ loop_level--;
+
+ return (body_status);
+}
+
+/* IF test THEN command [ELSE command].
+ IF also allows ELIF in the place of ELSE IF, but
+ the parser makes *that* stupidity transparent. */
+static int
+execute_if_command (if_command)
+ IF_COM *if_command;
+{
+ int return_value, save_line_number;
+
+ save_line_number = line_number;
+ if_command->test->flags |= CMD_IGNORE_RETURN;
+ return_value = execute_command (if_command->test);
+ line_number = save_line_number;
+
+ if (return_value == EXECUTION_SUCCESS)
+ {
+ QUIT;
+
+ if (if_command->true_case && (if_command->flags & CMD_IGNORE_RETURN))
+ if_command->true_case->flags |= CMD_IGNORE_RETURN;
+
+ return (execute_command (if_command->true_case));
+ }
+ else
+ {
+ QUIT;
+
+ if (if_command->false_case && (if_command->flags & CMD_IGNORE_RETURN))
+ if_command->false_case->flags |= CMD_IGNORE_RETURN;
+
+ return (execute_command (if_command->false_case));
+ }
+}
+
+#if defined (DPAREN_ARITHMETIC)
+static int
+execute_arith_command (arith_command)
+ ARITH_COM *arith_command;
+{
+ int expok, save_line_number, retval;
+ intmax_t expresult;
+ WORD_LIST *new;
+ char *exp;
+
+ expresult = 0;
+
+ save_line_number = line_number;
+ this_command_name = "(("; /* )) */
+ line_number = arith_command->line;
+ /* If we're in a function, update the line number information. */
+ if (variable_context && interactive_shell)
+ line_number -= function_line_number;
+
+ command_string_index = 0;
+ print_arith_command (arith_command->exp);
+
+ if (signal_in_progress (DEBUG_TRAP) == 0)
+ {
+ FREE (the_printed_command_except_trap);
+ the_printed_command_except_trap = savestring (the_printed_command);
+ }
+
+ /* Run the debug trap before each arithmetic command, but do it after we
+ update the line number information and before we expand the various
+ words in the expression. */
+ retval = run_debug_trap ();
+#if defined (DEBUGGER)
+ /* In debugging mode, if the DEBUG trap returns a non-zero status, we
+ skip the command. */
+ if (debugging_mode && retval != EXECUTION_SUCCESS)
+ {
+ line_number = save_line_number;
+ return (EXECUTION_SUCCESS);
+ }
+#endif
+
+ new = expand_words_no_vars (arith_command->exp);
+
+ /* If we're tracing, make a new word list with `((' at the front and `))'
+ at the back and print it. */
+ if (echo_command_at_execute)
+ xtrace_print_arith_cmd (new);
+
+ if (new)
+ {
+ exp = new->next ? string_list (new) : new->word->word;
+ expresult = evalexp (exp, &expok);
+ line_number = save_line_number;
+ if (exp != new->word->word)
+ free (exp);
+ dispose_words (new);
+ }
+ else
+ {
+ expresult = 0;
+ expok = 1;
+ }
+
+ if (expok == 0)
+ return (EXECUTION_FAILURE);
+
+ return (expresult == 0 ? EXECUTION_FAILURE : EXECUTION_SUCCESS);
+}
+#endif /* DPAREN_ARITHMETIC */
+
+#if defined (COND_COMMAND)
+
+static char * const nullstr = "";
+
+/* XXX - can COND ever be NULL when this is called? */
+static int
+execute_cond_node (cond)
+ COND_COM *cond;
+{
+ int result, invert, patmatch, rmatch, mflags, ignore;
+ char *arg1, *arg2;
+
+ invert = (cond->flags & CMD_INVERT_RETURN);
+ ignore = (cond->flags & CMD_IGNORE_RETURN);
+ if (ignore)
+ {
+ if (cond->left)
+ cond->left->flags |= CMD_IGNORE_RETURN;
+ if (cond->right)
+ cond->right->flags |= CMD_IGNORE_RETURN;
+ }
+
+ if (cond->type == COND_EXPR)
+ result = execute_cond_node (cond->left);
+ else if (cond->type == COND_OR)
+ {
+ result = execute_cond_node (cond->left);
+ if (result != EXECUTION_SUCCESS)
+ result = execute_cond_node (cond->right);
+ }
+ else if (cond->type == COND_AND)
+ {
+ result = execute_cond_node (cond->left);
+ if (result == EXECUTION_SUCCESS)
+ result = execute_cond_node (cond->right);
+ }
+ else if (cond->type == COND_UNARY)
+ {
+ if (ignore)
+ comsub_ignore_return++;
+ arg1 = cond_expand_word (cond->left->op, 0);
+ if (ignore)
+ comsub_ignore_return--;
+ if (arg1 == 0)
+ arg1 = nullstr;
+ if (echo_command_at_execute)
+ xtrace_print_cond_term (cond->type, invert, cond->op, arg1, (char *)NULL);
+ result = unary_test (cond->op->word, arg1) ? EXECUTION_SUCCESS : EXECUTION_FAILURE;
+ if (arg1 != nullstr)
+ free (arg1);
+ }
+ else if (cond->type == COND_BINARY)
+ {
+ rmatch = 0;
+ patmatch = (((cond->op->word[1] == '=') && (cond->op->word[2] == '\0') &&
+ (cond->op->word[0] == '!' || cond->op->word[0] == '=')) ||
+ (cond->op->word[0] == '=' && cond->op->word[1] == '\0'));
+#if defined (COND_REGEXP)
+ rmatch = (cond->op->word[0] == '=' && cond->op->word[1] == '~' &&
+ cond->op->word[2] == '\0');
+#endif
+
+ if (ignore)
+ comsub_ignore_return++;
+ arg1 = cond_expand_word (cond->left->op, 0);
+ if (ignore)
+ comsub_ignore_return--;
+ if (arg1 == 0)
+ arg1 = nullstr;
+ if (ignore)
+ comsub_ignore_return++;
+ arg2 = cond_expand_word (cond->right->op,
+ (rmatch && shell_compatibility_level > 31) ? 2 : (patmatch ? 1 : 0));
+ if (ignore)
+ comsub_ignore_return--;
+ if (arg2 == 0)
+ arg2 = nullstr;
+
+ if (echo_command_at_execute)
+ xtrace_print_cond_term (cond->type, invert, cond->op, arg1, arg2);
+
+#if defined (COND_REGEXP)
+ if (rmatch)
+ {
+ mflags = SHMAT_PWARN;
+#if defined (ARRAY_VARS)
+ mflags |= SHMAT_SUBEXP;
+#endif
+
+ result = sh_regmatch (arg1, arg2, mflags);
+ }
+ else
+#endif /* COND_REGEXP */
+ {
+ int oe;
+ oe = extended_glob;
+ extended_glob = 1;
+ result = binary_test (cond->op->word, arg1, arg2, TEST_PATMATCH|TEST_ARITHEXP|TEST_LOCALE)
+ ? EXECUTION_SUCCESS
+ : EXECUTION_FAILURE;
+ extended_glob = oe;
+ }
+ if (arg1 != nullstr)
+ free (arg1);
+ if (arg2 != nullstr)
+ free (arg2);
+ }
+ else
+ {
+ command_error ("execute_cond_node", CMDERR_BADTYPE, cond->type, 0);
+ jump_to_top_level (DISCARD);
+ result = EXECUTION_FAILURE;
+ }
+
+ if (invert)
+ result = (result == EXECUTION_SUCCESS) ? EXECUTION_FAILURE : EXECUTION_SUCCESS;
+
+ return result;
+}
+
+static int
+execute_cond_command (cond_command)
+ COND_COM *cond_command;
+{
+ int retval, save_line_number;
+
+ retval = EXECUTION_SUCCESS;
+ save_line_number = line_number;
+
+ this_command_name = "[[";
+ line_number = cond_command->line;
+ /* If we're in a function, update the line number information. */
+ if (variable_context && interactive_shell)
+ line_number -= function_line_number;
+ command_string_index = 0;
+ print_cond_command (cond_command);
+
+ if (signal_in_progress (DEBUG_TRAP) == 0)
+ {
+ FREE (the_printed_command_except_trap);
+ the_printed_command_except_trap = savestring (the_printed_command);
+ }
+
+ /* Run the debug trap before each conditional command, but do it after we
+ update the line number information. */
+ retval = run_debug_trap ();
+#if defined (DEBUGGER)
+ /* In debugging mode, if the DEBUG trap returns a non-zero status, we
+ skip the command. */
+ if (debugging_mode && retval != EXECUTION_SUCCESS)
+ {
+ line_number = save_line_number;
+ return (EXECUTION_SUCCESS);
+ }
+#endif
+
+#if 0
+ debug_print_cond_command (cond_command);
+#endif
+
+ last_command_exit_value = retval = execute_cond_node (cond_command);
+ line_number = save_line_number;
+ return (retval);
+}
+#endif /* COND_COMMAND */
+
+static void
+bind_lastarg (arg)
+ char *arg;
+{
+ SHELL_VAR *var;
+
+ if (arg == 0)
+ arg = "";
+ var = bind_variable ("_", arg, 0);
+ VUNSETATTR (var, att_exported);
+}
+
+/* Execute a null command. Fork a subshell if the command uses pipes or is
+ to be run asynchronously. This handles all the side effects that are
+ supposed to take place. */
+static int
+execute_null_command (redirects, pipe_in, pipe_out, async)
+ REDIRECT *redirects;
+ int pipe_in, pipe_out, async;
+{
+ int r;
+ int forcefork;
+ REDIRECT *rd;
+
+ for (forcefork = 0, rd = redirects; rd; rd = rd->next)
+ forcefork += rd->rflags & REDIR_VARASSIGN;
+
+ if (forcefork || pipe_in != NO_PIPE || pipe_out != NO_PIPE || async)
+ {
+ /* We have a null command, but we really want a subshell to take
+ care of it. Just fork, do piping and redirections, and exit. */
+ if (make_child ((char *)NULL, async) == 0)
+ {
+ /* Cancel traps, in trap.c. */
+ restore_original_signals (); /* XXX */
+
+ do_piping (pipe_in, pipe_out);
+
+#if defined (COPROCESS_SUPPORT)
+ coproc_closeall ();
+#endif
+
+ subshell_environment = 0;
+ if (async)
+ subshell_environment |= SUBSHELL_ASYNC;
+ if (pipe_in != NO_PIPE || pipe_out != NO_PIPE)
+ subshell_environment |= SUBSHELL_PIPE;
+
+ if (do_redirections (redirects, RX_ACTIVE) == 0)
+ exit (EXECUTION_SUCCESS);
+ else
+ exit (EXECUTION_FAILURE);
+ }
+ else
+ {
+ close_pipes (pipe_in, pipe_out);
+#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
+ if (pipe_out == NO_PIPE)
+ unlink_fifo_list ();
+#endif
+ return (EXECUTION_SUCCESS);
+ }
+ }
+ else
+ {
+ /* Even if there aren't any command names, pretend to do the
+ redirections that are specified. The user expects the side
+ effects to take place. If the redirections fail, then return
+ failure. Otherwise, if a command substitution took place while
+ expanding the command or a redirection, return the value of that
+ substitution. Otherwise, return EXECUTION_SUCCESS. */
+
+ r = do_redirections (redirects, RX_ACTIVE|RX_UNDOABLE);
+ cleanup_redirects (redirection_undo_list);
+ redirection_undo_list = (REDIRECT *)NULL;
+
+ if (r != 0)
+ return (EXECUTION_FAILURE);
+ else if (last_command_subst_pid != NO_PID)
+ return (last_command_exit_value);
+ else
+ return (EXECUTION_SUCCESS);
+ }
+}
+
+/* This is a hack to suppress word splitting for assignment statements
+ given as arguments to builtins with the ASSIGNMENT_BUILTIN flag set. */
+static void
+fix_assignment_words (words)
+ WORD_LIST *words;
+{
+ WORD_LIST *w, *wcmd;
+ struct builtin *b;
+ int assoc, global, array, 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 `$foo'. */
+ if (words == 0)
+ {
+ this_command_name = 0;
+ result = execute_null_command (simple_command->redirects,
+ pipe_in, pipe_out,
+ already_forked ? 0 : async);
+ if (already_forked)
+ exit (result);
+ else
+ {
+ bind_lastarg ((char *)NULL);
+ set_pipestatus_from_exit (result);
+ return (result);
+ }
+ }
+
+ lastarg = (char *)NULL;
+
+ begin_unwind_frame ("simple-command");
+
+ if (echo_command_at_execute)
+ xtrace_print_word_list (words, 1);
+
+ builtin = (sh_builtin_func_t *)NULL;
+ func = (SHELL_VAR *)NULL;
+ if ((simple_command->flags & CMD_NO_FUNCTIONS) == 0)
+ {
+ /* Posix.2 says special builtins are found before functions. We
+ don't set builtin_is_special anywhere other than here, because
+ this path is followed only when the `command' builtin is *not*
+ being used, and we don't want to exit the shell if a special
+ builtin executed with `command builtin' fails. `command' is not
+ a special builtin. */
+ if (posixly_correct)
+ {
+ builtin = find_special_builtin (words->word->word);
+ if (builtin)
+ builtin_is_special = 1;
+ }
+ if (builtin == 0)
+ func = find_function (words->word->word);
+ }
+
+ /* In POSIX mode, assignment errors in the temporary environment cause a
+ non-interactive shell to exit. */
+ if (builtin_is_special && interactive_shell == 0 && tempenv_assign_error)
+ {
+ last_command_exit_value = EXECUTION_FAILURE;
+ jump_to_top_level (ERREXIT);
+ }
+ tempenv_assign_error = 0; /* don't care about this any more */
+
+ add_unwind_protect (dispose_words, words);
+ QUIT;
+
+ /* Bind the last word in this command to "$_" 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)
+ {
+ result = builtin_status (result);
+ if (builtin_is_special)
+ special_builtin_failed = 1;
+ }
+ /* In POSIX mode, if there are assignment statements preceding
+ a special builtin, they persist after the builtin
+ completes. */
+ if (posixly_correct && builtin_is_special && temporary_env)
+ merge_temporary_env ();
+ }
+ else /* function */
+ {
+ if (result == EX_USAGE)
+ result = EX_BADUSAGE;
+ else if (result > EX_SHERRBASE)
+ result = EXECUTION_FAILURE;
+ }
+
+ set_pipestatus_from_exit (result);
+
+ goto return_result;
+ }
+ }
+
+ if (autocd && interactive && words->word && is_dirname (words->word->word))
+ {
+ words = make_word_list (make_word ("cd"), words);
+ xtrace_print_word_list (words, 0);
+ goto run_builtin;
+ }
+
+ if (command_line == 0)
+ command_line = savestring (the_printed_command_except_trap ? the_printed_command_except_trap : "");
+
+#if defined (PROCESS_SUBSTITUTION)
+ if ((subshell_environment & SUBSHELL_COMSUB) && (simple_command->flags & CMD_NO_FORK) && fifos_pending() > 0)
+ simple_command->flags &= ~CMD_NO_FORK;
+#endif
+
+ result = execute_disk_command (words, simple_command->redirects, command_line,
+ pipe_in, pipe_out, async, fds_to_close,
+ simple_command->flags);
+
+ return_result:
+ bind_lastarg (lastarg);
+ FREE (command_line);
+ dispose_words (words);
+ if (builtin)
+ {
+ executing_builtin = old_builtin;
+ executing_command_builtin = old_command_builtin;
+ }
+ discard_unwind_frame ("simple-command");
+ this_command_name = (char *)NULL; /* points to freed memory now */
+ return (result);
+}
+
+/* Translate the special builtin exit statuses. We don't really need a
+ function for this; it's a placeholder for future work. */
+static int
+builtin_status (result)
+ int result;
+{
+ int r;
+
+ switch (result)
+ {
+ case EX_USAGE:
+ r = EX_BADUSAGE;
+ break;
+ case EX_REDIRFAIL:
+ case EX_BADSYNTAX:
+ case EX_BADASSIGN:
+ case EX_EXPFAIL:
+ r = EXECUTION_FAILURE;
+ break;
+ default:
+ r = EXECUTION_SUCCESS;
+ break;
+ }
+ return (r);
+}
+
+static int
+execute_builtin (builtin, words, flags, subshell)
+ sh_builtin_func_t *builtin;
+ WORD_LIST *words;
+ int flags, subshell;
+{
+ int old_e_flag, result, eval_unwind;
+ int isbltinenv;
+ char *error_trap;
+
+ error_trap = 0;
+ old_e_flag = exit_immediately_on_error;
+
+ /* The eval builtin calls parse_and_execute, which does not know about
+ the setting of flags, and always calls the execution functions with
+ flags that will exit the shell on an error if -e is set. If the
+ eval builtin is being called, and we're supposed to ignore the exit
+ value of the command, we turn the -e flag off ourselves and disable
+ the ERR trap, then restore them when the command completes. This is
+ also a problem (as below) for the command and source/. builtins. */
+ if (subshell == 0 && (flags & CMD_IGNORE_RETURN) &&
+ (builtin == eval_builtin || builtin == command_builtin || builtin == source_builtin))
+ {
+ begin_unwind_frame ("eval_builtin");
+ unwind_protect_int (exit_immediately_on_error);
+ unwind_protect_int (builtin_ignoring_errexit);
+ error_trap = TRAP_STRING (ERROR_TRAP);
+ if (error_trap)
+ {
+ error_trap = savestring (error_trap);
+ add_unwind_protect (xfree, error_trap);
+ add_unwind_protect (set_error_trap, error_trap);
+ restore_default_signal (ERROR_TRAP);
+ }
+ exit_immediately_on_error = 0;
+ builtin_ignoring_errexit = 1;
+ eval_unwind = 1;
+ }
+ else
+ eval_unwind = 0;
+
+ /* The temporary environment for a builtin is supposed to apply to
+ all commands executed by that builtin. Currently, this is a
+ problem only with the `unset', `source' and `eval' builtins.
+ `mapfile' is a special case because it uses evalstring (same as
+ eval or source) to run its callbacks. */
+ isbltinenv = (builtin == source_builtin || builtin == eval_builtin || builtin == unset_builtin || builtin == mapfile_builtin);
+
+ if (isbltinenv)
+ {
+ if (subshell == 0)
+ begin_unwind_frame ("builtin_env");
+
+ if (temporary_env)
+ {
+ push_scope (VC_BLTNENV, temporary_env);
+ if (subshell == 0)
+ add_unwind_protect (pop_scope, (flags & CMD_COMMAND_BUILTIN) ? 0 : "1");
+ temporary_env = (HASH_TABLE *)NULL;
+ }
+ }
+
+ /* `return' does a longjmp() back to a saved environment in execute_function.
+ If a variable assignment list preceded the command, and the shell is
+ running in POSIX mode, we need to merge that into the shell_variables
+ table, since `return' is a POSIX special builtin. */
+ if (posixly_correct && subshell == 0 && builtin == return_builtin && temporary_env)
+ {
+ begin_unwind_frame ("return_temp_env");
+ add_unwind_protect (merge_temporary_env, (char *)NULL);
+ }
+
+ executing_builtin++;
+ executing_command_builtin |= builtin == command_builtin;
+ result = ((*builtin) (words->next));
+
+ /* This shouldn't happen, but in case `return' comes back instead of
+ longjmp'ing, we need to unwind. */
+ if (posixly_correct && subshell == 0 && builtin == return_builtin && temporary_env)
+ discard_unwind_frame ("return_temp_env");
+
+ if (subshell == 0 && isbltinenv)
+ run_unwind_frame ("builtin_env");
+
+ if (eval_unwind)
+ {
+ exit_immediately_on_error = errexit_flag;
+ builtin_ignoring_errexit = 0;
+ if (error_trap)
+ {
+ set_error_trap (error_trap);
+ xfree (error_trap);
+ }
+ discard_unwind_frame ("eval_builtin");
+ }
+
+ return (result);
+}
+
+static int
+execute_function (var, words, flags, fds_to_close, async, subshell)
+ SHELL_VAR *var;
+ WORD_LIST *words;
+ int flags;
+ struct fd_bitmap *fds_to_close;
+ int async, subshell;
+{
+ int return_val, result;
+ COMMAND *tc, *fc, *save_current;
+ char *debug_trap, *error_trap, *return_trap;
+#if defined (ARRAY_VARS)
+ SHELL_VAR *funcname_v, *nfv, *bash_source_v, *bash_lineno_v;
+ ARRAY *funcname_a;
+ volatile ARRAY *bash_source_a;
+ volatile ARRAY *bash_lineno_a;
+#endif
+ FUNCTION_DEF *shell_fn;
+ char *sfile, *t;
+
+ USE_VAR(fc);
+
+ if (funcnest_max > 0 && funcnest >= funcnest_max)
+ {
+ internal_error (_("%s: maximum function nesting level exceeded (%d)"), var->name, funcnest);
+ funcnest = 0; /* XXX - should we reset it somewhere else? */
+ jump_to_top_level (DISCARD);
+ }
+
+#if defined (ARRAY_VARS)
+ GET_ARRAY_FROM_VAR ("FUNCNAME", funcname_v, funcname_a);
+ GET_ARRAY_FROM_VAR ("BASH_SOURCE", bash_source_v, bash_source_a);
+ GET_ARRAY_FROM_VAR ("BASH_LINENO", bash_lineno_v, bash_lineno_a);
+#endif
+
+ tc = (COMMAND *)copy_command (function_cell (var));
+ if (tc && (flags & CMD_IGNORE_RETURN))
+ tc->flags |= CMD_IGNORE_RETURN;
+
+ if (subshell == 0)
+ {
+ begin_unwind_frame ("function_calling");
+ push_context (var->name, subshell, temporary_env);
+ add_unwind_protect (pop_context, (char *)NULL);
+ unwind_protect_int (line_number);
+ unwind_protect_int (return_catch_flag);
+ unwind_protect_jmp_buf (return_catch);
+ add_unwind_protect (dispose_command, (char *)tc);
+ unwind_protect_pointer (this_shell_function);
+ unwind_protect_int (loop_level);
+ unwind_protect_int (funcnest);
+ }
+ else
+ push_context (var->name, subshell, temporary_env); /* don't unwind-protect for subshells */
+
+ temporary_env = (HASH_TABLE *)NULL;
+
+ this_shell_function = var;
+ make_funcname_visible (1);
+
+ debug_trap = TRAP_STRING(DEBUG_TRAP);
+ error_trap = TRAP_STRING(ERROR_TRAP);
+ return_trap = TRAP_STRING(RETURN_TRAP);
+
+ /* The order of the unwind protects for debug_trap, error_trap and
+ return_trap is important here! unwind-protect commands are run
+ in reverse order of registration. If this causes problems, take
+ out the xfree unwind-protect calls and live with the small memory leak. */
+
+ /* function_trace_mode != 0 means that all functions inherit the DEBUG trap.
+ if the function has the trace attribute set, it inherits the DEBUG trap */
+ if (debug_trap && ((trace_p (var) == 0) && function_trace_mode == 0))
+ {
+ if (subshell == 0)
+ {
+ debug_trap = savestring (debug_trap);
+ add_unwind_protect (xfree, debug_trap);
+ add_unwind_protect (set_debug_trap, debug_trap);
+ }
+ restore_default_signal (DEBUG_TRAP);
+ }
+
+ /* error_trace_mode != 0 means that functions inherit the ERR trap. */
+ if (error_trap && error_trace_mode == 0)
+ {
+ if (subshell == 0)
+ {
+ error_trap = savestring (error_trap);
+ add_unwind_protect (xfree, error_trap);
+ add_unwind_protect (set_error_trap, error_trap);
+ }
+ restore_default_signal (ERROR_TRAP);
+ }
+
+ /* Shell functions inherit the RETURN trap if function tracing is on
+ globally or on individually for this function. */
+#if 0
+ if (return_trap && ((trace_p (var) == 0) && function_trace_mode == 0))
+#else
+ if (return_trap && (signal_in_progress (DEBUG_TRAP) || ((trace_p (var) == 0) && function_trace_mode == 0)))
+#endif
+ {
+ if (subshell == 0)
+ {
+ return_trap = savestring (return_trap);
+ add_unwind_protect (xfree, return_trap);
+ add_unwind_protect (set_return_trap, return_trap);
+ }
+ restore_default_signal (RETURN_TRAP);
+ }
+
+ funcnest++;
+#if defined (ARRAY_VARS)
+ /* This is quite similar to the code in shell.c and elsewhere. */
+ shell_fn = find_function_def (this_shell_function->name);
+ sfile = shell_fn ? shell_fn->source_file : "";
+ array_push ((ARRAY *)funcname_a, this_shell_function->name);
+
+ array_push ((ARRAY *)bash_source_a, sfile);
+ t = itos (executing_line_number ());
+ array_push ((ARRAY *)bash_lineno_a, t);
+ free (t);
+#endif
+
+ /* The temporary environment for a function is supposed to apply to
+ all commands executed within the function body. */
+
+ remember_args (words->next, 1);
+
+ /* Update BASH_ARGV and BASH_ARGC */
+ if (debugging_mode)
+ push_args (words->next);
+
+ /* Number of the line on which the function body starts. */
+ line_number = function_line_number = tc->line;
+
+#if defined (JOB_CONTROL)
+ if (subshell)
+ stop_pipeline (async, (COMMAND *)NULL);
+#endif
+
+ fc = tc;
+
+ return_catch_flag++;
+ return_val = setjmp_nosigs (return_catch);
+
+ if (return_val)
+ {
+ result = return_catch_value;
+ /* Run the RETURN trap in the function's context. */
+ save_current = currently_executing_command;
+ run_return_trap ();
+ currently_executing_command = save_current;
+ }
+ else
+ {
+ /* Run the debug trap here so we can trap at the start of a function's
+ execution rather than the execution of the body's first command. */
+ showing_function_line = 1;
+ save_current = currently_executing_command;
+ result = run_debug_trap ();
+#if defined (DEBUGGER)
+ /* In debugging mode, if the DEBUG trap returns a non-zero status, we
+ skip the command. */
+ if (debugging_mode == 0 || result == EXECUTION_SUCCESS)
+ {
+ showing_function_line = 0;
+ currently_executing_command = save_current;
+ result = execute_command_internal (fc, 0, NO_PIPE, NO_PIPE, fds_to_close);
+
+ /* Run the RETURN trap in the function's context */
+ save_current = currently_executing_command;
+ run_return_trap ();
+ currently_executing_command = save_current;
+ }
+#else
+ result = execute_command_internal (fc, 0, NO_PIPE, NO_PIPE, fds_to_close);
+
+ save_current = currently_executing_command;
+ run_return_trap ();
+ currently_executing_command = save_current;
+#endif
+ showing_function_line = 0;
+ }
+
+ /* Restore BASH_ARGC and BASH_ARGV */
+ if (debugging_mode)
+ pop_args ();
+
+ if (subshell == 0)
+ run_unwind_frame ("function_calling");
+
+#if defined (ARRAY_VARS)
+ /* These two variables cannot be unset, and cannot be affected by the
+ function. */
+ array_pop ((ARRAY *)bash_source_a);
+ array_pop ((ARRAY *)bash_lineno_a);
+
+ /* FUNCNAME can be unset, and so can potentially be changed by the
+ function. */
+ GET_ARRAY_FROM_VAR ("FUNCNAME", nfv, funcname_a);
+ if (nfv == funcname_v)
+ array_pop (funcname_a);
+#endif
+
+ if (variable_context == 0 || this_shell_function == 0)
+ {
+ make_funcname_visible (0);
+#if defined (PROCESS_SUBSTITUTION)
+ unlink_fifo_list ();
+#endif
+ }
+
+ return (result);
+}
+
+/* A convenience routine for use by other parts of the shell to execute
+ a particular shell function. */
+int
+execute_shell_function (var, words)
+ SHELL_VAR *var;
+ WORD_LIST *words;
+{
+ int ret;
+ struct fd_bitmap *bitmap;
+
+ bitmap = new_fd_bitmap (FD_BITMAP_DEFAULT_SIZE);
+ begin_unwind_frame ("execute-shell-function");
+ add_unwind_protect (dispose_fd_bitmap, (char *)bitmap);
+
+ ret = execute_function (var, words, 0, bitmap, 0, 0);
+
+ dispose_fd_bitmap (bitmap);
+ discard_unwind_frame ("execute-shell-function");
+
+ return ret;
+}
+
+/* Execute a shell builtin or function in a subshell environment. This
+ routine does not return; it only calls exit(). If BUILTIN is non-null,
+ it points to a function to call to execute a shell builtin; otherwise
+ VAR points at the body of a function to execute. WORDS is the arguments
+ to the command, REDIRECTS specifies redirections to perform before the
+ command is executed. */
+static void
+execute_subshell_builtin_or_function (words, redirects, builtin, var,
+ pipe_in, pipe_out, async, fds_to_close,
+ flags)
+ WORD_LIST *words;
+ REDIRECT *redirects;
+ sh_builtin_func_t *builtin;
+ SHELL_VAR *var;
+ int pipe_in, pipe_out, async;
+ struct fd_bitmap *fds_to_close;
+ int flags;
+{
+ int result, r, funcvalue;
+#if defined (JOB_CONTROL)
+ int jobs_hack;
+
+ jobs_hack = (builtin == jobs_builtin) &&
+ ((subshell_environment & SUBSHELL_ASYNC) == 0 || pipe_out != NO_PIPE);
+#endif
+
+ /* A subshell is neither a login shell nor interactive. */
+ login_shell = interactive = 0;
+
+ if (async)
+ subshell_environment |= SUBSHELL_ASYNC;
+ if (pipe_in != NO_PIPE || pipe_out != NO_PIPE)
+ subshell_environment |= SUBSHELL_PIPE;
+
+ maybe_make_export_env (); /* XXX - is this needed? */
+
+#if defined (JOB_CONTROL)
+ /* Eradicate all traces of job control after we fork the subshell, so
+ all jobs begun by this subshell are in the same process group as
+ the shell itself. */
+
+ /* Allow the output of `jobs' to be piped. */
+ if (jobs_hack)
+ kill_current_pipeline ();
+ else
+ without_job_control ();
+
+ set_sigchld_handler ();
+#endif /* JOB_CONTROL */
+
+ set_sigint_handler ();
+
+ if (fds_to_close)
+ close_fd_bitmap (fds_to_close);
+
+ do_piping (pipe_in, pipe_out);
+
+ if (do_redirections (redirects, RX_ACTIVE) != 0)
+ exit (EXECUTION_FAILURE);
+
+ if (builtin)
+ {
+ /* Give builtins a place to jump back to on failure,
+ so we don't go back up to main(). */
+ result = setjmp_nosigs (top_level);
+
+ /* Give the return builtin a place to jump to when executed in a subshell
+ or pipeline */
+ funcvalue = 0;
+ if (return_catch_flag && builtin == return_builtin)
+ funcvalue = setjmp_nosigs (return_catch);
+
+ if (result == EXITPROG)
+ exit (last_command_exit_value);
+ else if (result)
+ exit (EXECUTION_FAILURE);
+ else if (funcvalue)
+ exit (return_catch_value);
+ else
+ {
+ r = execute_builtin (builtin, words, flags, 1);
+ fflush (stdout);
+ if (r == EX_USAGE)
+ r = EX_BADUSAGE;
+ exit (r);
+ }
+ }
+ else
+ {
+ r = execute_function (var, words, flags, fds_to_close, async, 1);
+ fflush (stdout);
+ exit (r);
+ }
+}
+
+/* Execute a builtin or function in the current shell context. If BUILTIN
+ is non-null, it is the builtin command to execute, otherwise VAR points
+ to the body of a function. WORDS are the command's arguments, REDIRECTS
+ are the redirections to perform. FDS_TO_CLOSE is the usual bitmap of
+ file descriptors to close.
+
+ If BUILTIN is exec_builtin, the redirections specified in REDIRECTS are
+ not undone before this function returns. */
+static int
+execute_builtin_or_function (words, builtin, var, redirects,
+ fds_to_close, flags)
+ WORD_LIST *words;
+ sh_builtin_func_t *builtin;
+ SHELL_VAR *var;
+ REDIRECT *redirects;
+ struct fd_bitmap *fds_to_close;
+ int flags;
+{
+ int result;
+ REDIRECT *saved_undo_list;
+#if defined (PROCESS_SUBSTITUTION)
+ int ofifo, nfifo, osize;
+ char *ofifo_list;
+#endif
+
+
+#if defined (PROCESS_SUBSTITUTION)
+ ofifo = num_fifos ();
+ ofifo_list = copy_fifo_list (&osize);
+#endif
+
+ if (do_redirections (redirects, RX_ACTIVE|RX_UNDOABLE) != 0)
+ {
+ cleanup_redirects (redirection_undo_list);
+ redirection_undo_list = (REDIRECT *)NULL;
+ dispose_exec_redirects ();
+#if defined (PROCESS_SUBSTITUTION)
+ free (ofifo_list);
+#endif
+ return (EX_REDIRFAIL); /* was EXECUTION_FAILURE */
+ }
+
+ saved_undo_list = redirection_undo_list;
+
+ /* Calling the "exec" builtin changes redirections forever. */
+ if (builtin == exec_builtin)
+ {
+ dispose_redirects (saved_undo_list);
+ saved_undo_list = exec_redirection_undo_list;
+ exec_redirection_undo_list = (REDIRECT *)NULL;
+ }
+ else
+ dispose_exec_redirects ();
+
+ if (saved_undo_list)
+ {
+ begin_unwind_frame ("saved redirects");
+ add_unwind_protect (cleanup_redirects, (char *)saved_undo_list);
+ }
+
+ redirection_undo_list = (REDIRECT *)NULL;
+
+ if (builtin)
+ result = execute_builtin (builtin, words, flags, 0);
+ else
+ result = execute_function (var, words, flags, fds_to_close, 0, 0);
+
+ /* We do this before undoing the effects of any redirections. */
+ fflush (stdout);
+ fpurge (stdout);
+ if (ferror (stdout))
+ clearerr (stdout);
+
+ /* If we are executing the `command' builtin, but this_shell_builtin is
+ set to `exec_builtin', we know that we have something like
+ `command exec [redirection]', since otherwise `exec' would have
+ overwritten the shell and we wouldn't get here. In this case, we
+ want to behave as if the `command' builtin had not been specified
+ and preserve the redirections. */
+ if (builtin == command_builtin && this_shell_builtin == exec_builtin)
+ {
+ int discard;
+
+ discard = 0;
+ if (saved_undo_list)
+ {
+ dispose_redirects (saved_undo_list);
+ discard = 1;
+ }
+ redirection_undo_list = exec_redirection_undo_list;
+ saved_undo_list = exec_redirection_undo_list = (REDIRECT *)NULL;
+ if (discard)
+ discard_unwind_frame ("saved redirects");
+ }
+
+ if (saved_undo_list)
+ {
+ redirection_undo_list = saved_undo_list;
+ discard_unwind_frame ("saved redirects");
+ }
+
+ if (redirection_undo_list)
+ {
+ cleanup_redirects (redirection_undo_list);
+ redirection_undo_list = (REDIRECT *)NULL;
+ }
+
+#if defined (PROCESS_SUBSTITUTION)
+ /* Close any FIFOs created by this builtin or function. */
+ nfifo = num_fifos ();
+ if (nfifo > ofifo)
+ close_new_fifos (ofifo_list, osize);
+ free (ofifo_list);
+#endif
+
+ return (result);
+}
+
+void
+setup_async_signals ()
+{
+#if defined (__BEOS__)
+ set_signal_handler (SIGHUP, SIG_IGN); /* they want csh-like behavior */
+#endif
+
+#if defined (JOB_CONTROL)
+ if (job_control == 0)
+#endif
+ {
+ set_signal_handler (SIGINT, SIG_IGN);
+ set_signal_ignored (SIGINT);
+ set_signal_handler (SIGQUIT, SIG_IGN);
+ set_signal_ignored (SIGQUIT);
+ }
+}
+
+/* Execute a simple command that is hopefully defined in a disk file
+ somewhere.
+
+ 1) fork ()
+ 2) connect pipes
+ 3) look up the command
+ 4) do redirections
+ 5) execve ()
+ 6) If the execve failed, see if the file has executable mode set.
+ If so, and it isn't a directory, then execute its contents as
+ a shell script.
+
+ Note that the filename hashing stuff has to take place up here,
+ in the parent. This is probably why the Bourne style shells
+ don't handle it, since that would require them to go through
+ this gnarly hair, for no good reason.
+
+ NOTE: callers expect this to fork or exit(). */
+
+/* Name of a shell function to call when a command name is not found. */
+#ifndef NOTFOUND_HOOK
+# define NOTFOUND_HOOK "command_not_found_handle"
+#endif
+
+static int
+execute_disk_command (words, redirects, command_line, pipe_in, pipe_out,
+ async, fds_to_close, cmdflags)
+ WORD_LIST *words;
+ REDIRECT *redirects;
+ char *command_line;
+ int pipe_in, pipe_out, async;
+ struct fd_bitmap *fds_to_close;
+ int cmdflags;
+{
+ char *pathname, *command, **args;
+ int nofork, result;
+ pid_t pid;
+ SHELL_VAR *hookf;
+ WORD_LIST *wl;
+
+ nofork = (cmdflags & CMD_NO_FORK); /* Don't fork, just exec, if no pipes */
+ pathname = words->word->word;
+
+ result = EXECUTION_SUCCESS;
+#if defined (RESTRICTED_SHELL)
+ command = (char *)NULL;
+ if (restricted && mbschr (pathname, '/'))
+ {
+ internal_error (_("%s: restricted: cannot specify `/' in command names"),
+ pathname);
+ result = last_command_exit_value = EXECUTION_FAILURE;
+
+ /* If we're not going to fork below, we must already be in a child
+ process or a context in which it's safe to call exit(2). */
+ if (nofork && pipe_in == NO_PIPE && pipe_out == NO_PIPE)
+ exit (last_command_exit_value);
+ else
+ goto parent_return;
+ }
+#endif /* RESTRICTED_SHELL */
+
+ command = search_for_command (pathname, 1);
+
+ if (command)
+ {
+ maybe_make_export_env ();
+ put_command_name_into_env (command);
+ }
+
+ /* We have to make the child before we check for the non-existence
+ of COMMAND, since we want the error messages to be redirected. */
+ /* If we can get away without forking and there are no pipes to deal with,
+ don't bother to fork, just directly exec the command. */
+ if (nofork && pipe_in == NO_PIPE && pipe_out == NO_PIPE)
+ pid = 0;
+ else
+ pid = make_child (savestring (command_line), async);
+
+ if (pid == 0)
+ {
+ int old_interactive;
+
+ reset_terminating_signals (); /* XXX */
+ /* Cancel traps, in trap.c. */
+ restore_original_signals ();
+
+ CHECK_SIGTERM;
+
+ /* restore_original_signals may have undone the work done
+ by make_child to ensure that SIGINT and SIGQUIT are ignored
+ in asynchronous children. */
+ if (async)
+ {
+ if ((cmdflags & CMD_STDIN_REDIR) &&
+ pipe_in == NO_PIPE &&
+ (stdin_redirects (redirects) == 0))
+ async_redirect_stdin ();
+ setup_async_signals ();
+ }
+
+ /* This functionality is now provided by close-on-exec of the
+ file descriptors manipulated by redirection and piping.
+ Some file descriptors still need to be closed in all children
+ because of the way bash does pipes; fds_to_close is a
+ bitmap of all such file descriptors. */
+ if (fds_to_close)
+ close_fd_bitmap (fds_to_close);
+
+ do_piping (pipe_in, pipe_out);
+
+ old_interactive = interactive;
+ if (async)
+ interactive = 0;
+
+ subshell_environment = SUBSHELL_FORK;
+
+ if (redirects && (do_redirections (redirects, RX_ACTIVE) != 0))
+ {
+#if defined (PROCESS_SUBSTITUTION)
+ /* Try to remove named pipes that may have been created as the
+ result of redirections. */
+ unlink_fifo_list ();
+#endif /* PROCESS_SUBSTITUTION */
+ exit (EXECUTION_FAILURE);
+ }
+
+ if (async)
+ interactive = old_interactive;
+
+ if (command == 0)
+ {
+ hookf = find_function (NOTFOUND_HOOK);
+ if (hookf == 0)
+ {
+ /* Make sure filenames are displayed using printable characters */
+ if (ansic_shouldquote (pathname))
+ pathname = ansic_quote (pathname, 0, NULL);
+ internal_error (_("%s: command not found"), pathname);
+ exit (EX_NOTFOUND); /* Posix.2 says the exit status is 127 */
+ }
+
+#if defined (JOB_CONTROL)
+ /* May need to reinitialize more of the job control state here. */
+ kill_current_pipeline ();
+#endif
+
+ wl = make_word_list (make_word (NOTFOUND_HOOK), words);
+ exit (execute_shell_function (hookf, wl));
+ }
+
+ CHECK_SIGTERM;
+
+ /* Execve expects the command name to be in args[0]. So we
+ leave it there, in the same format that the user used to
+ type it in. */
+ args = strvec_from_word_list (words, 0, 0, (int *)NULL);
+ exit (shell_execve (command, args, export_env));
+ }
+ else
+ {
+parent_return:
+ QUIT;
+
+ /* Make sure that the pipes are closed in the parent. */
+ close_pipes (pipe_in, pipe_out);
+#if defined (PROCESS_SUBSTITUTION) && defined (HAVE_DEV_FD)
+ if (variable_context == 0)
+ unlink_fifo_list ();
+#endif
+ FREE (command);
+ return (result);
+ }
+}
+
+/* CPP defines to decide whether a particular index into the #! line
+ corresponds to a valid interpreter name or argument character, or
+ whitespace. The MSDOS define is to allow \r to be treated the same
+ as \n. */
+
+#if !defined (MSDOS)
+# define STRINGCHAR(ind) \
+ (ind < sample_len && !whitespace (sample[ind]) && sample[ind] != '\n')
+# define WHITECHAR(ind) \
+ (ind < sample_len && whitespace (sample[ind]))
+#else /* MSDOS */
+# define STRINGCHAR(ind) \
+ (ind < sample_len && !whitespace (sample[ind]) && sample[ind] != '\n' && sample[ind] != '\r')
+# define WHITECHAR(ind) \
+ (ind < sample_len && whitespace (sample[ind]))
+#endif /* MSDOS */
+
+static char *
+getinterp (sample, sample_len, endp)
+ char *sample;
+ int sample_len, *endp;
+{
+ register int i;
+ char *execname;
+ int start;
+
+ /* Find the name of the interpreter to exec. */
+ for (i = 2; i < sample_len && whitespace (sample[i]); i++)
+ ;
+
+ for (start = i; STRINGCHAR(i); i++)
+ ;
+
+ execname = substring (sample, start, i);
+
+ if (endp)
+ *endp = i;
+ return execname;
+}
+
+#if !defined (HAVE_HASH_BANG_EXEC)
+/* If the operating system on which we're running does not handle
+ the #! executable format, then help out. SAMPLE is the text read
+ from the file, SAMPLE_LEN characters. COMMAND is the name of
+ the script; it and ARGS, the arguments given by the user, will
+ become arguments to the specified interpreter. ENV is the environment
+ to pass to the interpreter.
+
+ The word immediately following the #! is the interpreter to execute.
+ A single argument to the interpreter is allowed. */
+
+static int
+execute_shell_script (sample, sample_len, command, args, env)
+ char *sample;
+ int sample_len;
+ char *command;
+ char **args, **env;
+{
+ char *execname, *firstarg;
+ int i, start, size_increment, larry;
+
+ /* Find the name of the interpreter to exec. */
+ execname = getinterp (sample, sample_len, &i);
+ size_increment = 1;
+
+ /* Now the argument, if any. */
+ for (firstarg = (char *)NULL, start = i; WHITECHAR(i); i++)
+ ;
+
+ /* If there is more text on the line, then it is an argument for the
+ interpreter. */
+
+ if (STRINGCHAR(i))
+ {
+ for (start = i; STRINGCHAR(i); i++)
+ ;
+ firstarg = substring ((char *)sample, start, i);
+ size_increment = 2;
+ }
+
+ larry = strvec_len (args) + size_increment;
+ args = strvec_resize (args, larry + 1);
+
+ for (i = larry - 1; i; i--)
+ args[i] = args[i - size_increment];
+
+ args[0] = execname;
+ if (firstarg)
+ {
+ args[1] = firstarg;
+ args[2] = command;
+ }
+ else
+ args[1] = command;
+
+ args[larry] = (char *)NULL;
+
+ return (shell_execve (execname, args, env));
+}
+#undef STRINGCHAR
+#undef WHITECHAR
+
+#endif /* !HAVE_HASH_BANG_EXEC */
+
+static void
+initialize_subshell ()
+{
+#if defined (ALIAS)
+ /* Forget about any aliases that we knew of. We are in a subshell. */
+ delete_all_aliases ();
+#endif /* ALIAS */
+
+#if defined (HISTORY)
+ /* Forget about the history lines we have read. This is a non-interactive
+ subshell. */
+ history_lines_this_session = 0;
+#endif
+
+#if defined (JOB_CONTROL)
+ /* Forget about the way job control was working. We are in a subshell. */
+ without_job_control ();
+ set_sigchld_handler ();
+ init_job_stats ();
+#endif /* JOB_CONTROL */
+
+ /* Reset the values of the shell flags and options. */
+ reset_shell_flags ();
+ reset_shell_options ();
+ reset_shopt_options ();
+
+ /* Zero out builtin_env, since this could be a shell script run from a
+ sourced file with a temporary environment supplied to the `source/.'
+ builtin. Such variables are not supposed to be exported (empirical
+ testing with sh and ksh). Just throw it away; don't worry about a
+ memory leak. */
+ if (vc_isbltnenv (shell_variables))
+ shell_variables = shell_variables->down;
+
+ clear_unwind_protect_list (0);
+ /* XXX -- are there other things we should be resetting here? */
+ parse_and_execute_level = 0; /* nothing left to restore it */
+
+ /* We're no longer inside a shell function. */
+ variable_context = return_catch_flag = funcnest = 0;
+
+ executing_list = 0; /* XXX */
+
+ /* If we're not interactive, close the file descriptor from which we're
+ reading the current shell script. */
+ if (interactive_shell == 0)
+ unset_bash_input (0);
+}
+
+#if defined (HAVE_SETOSTYPE) && defined (_POSIX_SOURCE)
+# define SETOSTYPE(x) __setostype(x)
+#else
+# define SETOSTYPE(x)
+#endif
+
+#define READ_SAMPLE_BUF(file, buf, len) \
+ do \
+ { \
+ fd = open(file, O_RDONLY); \
+ if (fd >= 0) \
+ { \
+ len = read (fd, buf, 80); \
+ close (fd); \
+ } \
+ else \
+ len = -1; \
+ } \
+ while (0)
+
+/* Call execve (), handling interpreting shell scripts, and handling
+ exec failures. */
+int
+shell_execve (command, args, env)
+ char *command;
+ char **args, **env;
+{
+ int larray, i, fd;
+ char sample[80];
+ int sample_len;
+
+ SETOSTYPE (0); /* Some systems use for USG/POSIX semantics */
+ execve (command, args, env);
+ i = errno; /* error from execve() */
+ CHECK_TERMSIG;
+ SETOSTYPE (1);
+
+ /* If we get to this point, then start checking out the file.
+ Maybe it is something we can hack ourselves. */
+ if (i != ENOEXEC)
+ {
+ if (file_isdir (command))
+#if defined (EISDIR)
+ internal_error (_("%s: %s"), command, strerror (EISDIR));
+#else
+ internal_error (_("%s: is a directory"), command);
+#endif
+ else if (executable_file (command) == 0)
+ {
+ errno = i;
+ file_error (command);
+ }
+ /* errors not involving the path argument to execve. */
+ else if (i == E2BIG || i == ENOMEM)
+ {
+ errno = i;
+ file_error (command);
+ }
+ else
+ {
+ /* The file has the execute bits set, but the kernel refuses to
+ run it for some reason. See why. */
+#if defined (HAVE_HASH_BANG_EXEC)
+ READ_SAMPLE_BUF (command, sample, sample_len);
+ sample[sample_len - 1] = '\0';
+ if (sample_len > 2 && sample[0] == '#' && sample[1] == '!')
+ {
+ char *interp;
+ int ilen;
+
+ interp = getinterp (sample, sample_len, (int *)NULL);
+ ilen = strlen (interp);
+ errno = i;
+ if (interp[ilen - 1] == '\r')
+ {
+ interp = xrealloc (interp, ilen + 2);
+ interp[ilen - 1] = '^';
+ interp[ilen] = 'M';
+ interp[ilen + 1] = '\0';
+ }
+ sys_error (_("%s: %s: bad interpreter"), command, interp ? interp : "");
+ FREE (interp);
+ return (EX_NOEXEC);
+ }
+#endif
+ errno = i;
+ file_error (command);
+ }
+ return ((i == ENOENT) ? EX_NOTFOUND : EX_NOEXEC); /* XXX Posix.2 says that exit status is 126 */
+ }
+
+ /* This file is executable.
+ If it begins with #!, then help out people with losing operating
+ systems. Otherwise, check to see if it is a binary file by seeing
+ if the contents of the first line (or up to 80 characters) are in the
+ ASCII set. If it's a text file, execute the contents as shell commands,
+ otherwise return 126 (EX_BINARY_FILE). */
+ READ_SAMPLE_BUF (command, sample, sample_len);
+
+ if (sample_len == 0)
+ return (EXECUTION_SUCCESS);
+
+ /* Is this supposed to be an executable script?
+ If so, the format of the line is "#! interpreter [argument]".
+ A single argument is allowed. The BSD kernel restricts
+ the length of the entire line to 32 characters (32 bytes
+ being the size of the BSD exec header), but we allow 80
+ characters. */
+ if (sample_len > 0)
+ {
+#if !defined (HAVE_HASH_BANG_EXEC)
+ if (sample_len > 2 && sample[0] == '#' && sample[1] == '!')
+ return (execute_shell_script (sample, sample_len, command, args, env));
+ else
+#endif
+ if (check_binary_file (sample, sample_len))
+ {
+ internal_error (_("%s: cannot execute binary file: %s"), command, strerror (i));
+ return (EX_BINARY_FILE);
+ }
+ }
+
+ /* We have committed to attempting to execute the contents of this file
+ as shell commands. */
+
+ initialize_subshell ();
+
+ set_sigint_handler ();
+
+ /* Insert the name of this shell into the argument list. */
+ larray = strvec_len (args) + 1;
+ args = strvec_resize (args, larray + 1);
+
+ for (i = larray - 1; i; i--)
+ args[i] = args[i - 1];
+
+ args[0] = shell_name;
+ args[1] = command;
+ args[larray] = (char *)NULL;
+
+ if (args[0][0] == '-')
+ args[0]++;
+
+#if defined (RESTRICTED_SHELL)
+ if (restricted)
+ change_flag ('r', FLAG_OFF);
+#endif
+
+ if (subshell_argv)
+ {
+ /* Can't free subshell_argv[0]; that is shell_name. */
+ for (i = 1; i < subshell_argc; i++)
+ free (subshell_argv[i]);
+ free (subshell_argv);
+ }
+
+ dispose_command (currently_executing_command); /* XXX */
+ currently_executing_command = (COMMAND *)NULL;
+
+ subshell_argc = larray;
+ subshell_argv = args;
+ subshell_envp = env;
+
+ unbind_args (); /* remove the positional parameters */
+
+ longjmp (subshell_top_level, 1);
+ /*NOTREACHED*/
+}
+
+static int
+execute_intern_function (name, funcdef)
+ WORD_DESC *name;
+ FUNCTION_DEF *funcdef;
+{
+ SHELL_VAR *var;
+
+ if (check_identifier (name, posixly_correct) == 0)
+ {
+ if (posixly_correct && interactive_shell == 0)
+ {
+ last_command_exit_value = EX_BADUSAGE;
+ jump_to_top_level (ERREXIT);
+ }
+ return (EXECUTION_FAILURE);
+ }
+
+ /* Posix interpretation 383 */
+ if (posixly_correct && find_special_builtin (name->word))
+ {
+ internal_error (_("`%s': is a special builtin"), name->word);
+ last_command_exit_value = EX_BADUSAGE;
+ jump_to_top_level (ERREXIT);
+ }
+
+ var = find_function (name->word);
+ if (var && (readonly_p (var) || noassign_p (var)))
+ {
+ if (readonly_p (var))
+ internal_error (_("%s: readonly function"), var->name);
+ return (EXECUTION_FAILURE);
+ }
+
+#if defined (DEBUGGER)
+ bind_function_def (name->word, funcdef);
+#endif
+
+ bind_function (name->word, funcdef->command);
+ return (EXECUTION_SUCCESS);
+}
+
+#if defined (INCLUDE_UNUSED)
+#if defined (PROCESS_SUBSTITUTION)
+void
+close_all_files ()
+{
+ register int i, fd_table_size;
+
+ fd_table_size = getdtablesize ();
+ if (fd_table_size > 256) /* clamp to a reasonable value */
+ fd_table_size = 256;
+
+ for (i = 3; i < fd_table_size; i++)
+ close (i);
+}
+#endif /* PROCESS_SUBSTITUTION */
+#endif
+
+static void
+close_pipes (in, out)
+ int in, out;
+{
+ if (in >= 0)
+ close (in);
+ if (out >= 0)
+ close (out);
+}
+
+static void
+dup_error (oldd, newd)
+ int oldd, newd;
+{
+ sys_error (_("cannot duplicate fd %d to fd %d"), oldd, newd);
+}
+
+/* Redirect input and output to be from and to the specified pipes.
+ NO_PIPE and REDIRECT_BOTH are handled correctly. */
+static void
+do_piping (pipe_in, pipe_out)
+ int pipe_in, pipe_out;
+{
+ if (pipe_in != NO_PIPE)
+ {
+ if (dup2 (pipe_in, 0) < 0)
+ dup_error (pipe_in, 0);
+ if (pipe_in > 0)
+ close (pipe_in);
+#ifdef __CYGWIN__
+ /* Let stdio know the fd may have changed from text to binary mode. */
+ freopen (NULL, "r", stdin);
+#endif /* __CYGWIN__ */
+ }
+ if (pipe_out != NO_PIPE)
+ {
+ if (pipe_out != REDIRECT_BOTH)
+ {
+ if (dup2 (pipe_out, 1) < 0)
+ dup_error (pipe_out, 1);
+ if (pipe_out == 0 || pipe_out > 1)
+ close (pipe_out);
+ }
+ else
+ {
+ if (dup2 (1, 2) < 0)
+ dup_error (1, 2);
+ }
+#ifdef __CYGWIN__
+ /* Let stdio know the fd may have changed from text to binary mode, and
+ make sure to preserve stdout line buffering. */
+ freopen (NULL, "w", stdout);
+ sh_setlinebuf (stdout);
+#endif /* __CYGWIN__ */
+ }
+}
default:
/* should we ? */
- abort ();
+ /* abort (); no, we should not */
+ state = ST_ERROR;
+ break;
}
}
}
}
if (state == -1)
- _rl_errmsg ("LS_COLORS: unrecognized prefix: %s", label);
+ {
+ _rl_errmsg ("LS_COLORS: unrecognized prefix: %s", label);
+ /* recover from an unrecognized prefix */
+ while (p && *p && *p != ':')
+ p++;
+ if (p && *p == ':')
+ state = 1;
+ else if (p && *p == 0)
+ state = 0;
+ }
}
break;
}
else
state = -1;
+ /* XXX - recover here as with an unrecognized prefix? */
+ if (state == -1 && ext->ext.string)
+ _rl_errmsg ("LS_COLORS: syntax error: %s", ext->ext.string);
break;
}
}
e = e->next;
free (e2);
}
+ _rl_color_ext_list = NULL;
+ _rl_colored_stats = 0; /* can't have colored stats without colors */
}
#else /* !COLOR_SUPPORT */
;
-BUILD_DIR=/usr/local/build/chet/bash/bash-current
+BUILD_DIR=/usr/local/build/bash/bash-current
THIS_SH=$BUILD_DIR/bash
PATH=$PATH:$BUILD_DIR
--- /dev/null
+BUILD_DIR=/usr/local/build/chet/bash/bash-current
+THIS_SH=$BUILD_DIR/bash
+PATH=$PATH:$BUILD_DIR
+
+export THIS_SH PATH
+
+rm -f /tmp/xx
+
+/bin/sh "$@"
./nameref6.sub: line 40: 2: invalid variable name for name reference
./nameref6.sub: line 41: 2: invalid variable name for name reference
2 -- 0
+bar
${THIS_SH} ./nameref4.sub
${THIS_SH} ./nameref5.sub
${THIS_SH} ./nameref6.sub
+${THIS_SH} ./nameref7.sub
--- /dev/null
+fn ()
+{
+ declare -n var=foo; var=bar
+}
+
+unset foo
+fn
+echo ${foo:-unset}
old_var = find_variable (name);
if (old_var && local_p (old_var) && old_var->context == variable_context)
{
- VUNSETATTR (old_var, att_invisible);
+ VUNSETATTR (old_var, att_invisible); /* XXX */
return (old_var);
}
if (ifsname (name))
setifs (new_var);
+ if (was_tmpvar == 0)
+ VSETATTR (new_var, att_invisible); /* XXX */
return (new_var);
}
{
nv = find_variable_last_nameref_context (v, vc, &nvc);
if (nv && nameref_p (nv))
- return (bind_variable_internal (nameref_cell (nv), value, nvc->table, 0, flags));
+ {
+ /* If this nameref variable doesn't have a value yet,
+ set the value. Otherwise, assign using the value as
+ normal. */
+ if (nameref_cell (nv) == 0)
+ return (bind_variable_internal (nv->name, value, nvc->table, 0, flags));
+ return (bind_variable_internal (nameref_cell (nv), value, nvc->table, 0, flags));
+ }
else
v = nv;
}
--- /dev/null
+/* variables.c -- Functions for hacking shell variables. */
+
+/* Copyright (C) 1987-2013 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "config.h"
+
+#include "bashtypes.h"
+#include "posixstat.h"
+#include "posixtime.h"
+
+#if defined (__QNX__)
+# if defined (__QNXNTO__)
+# include <sys/netmgr.h>
+# else
+# include <sys/vc.h>
+# endif /* !__QNXNTO__ */
+#endif /* __QNX__ */
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include "chartypes.h"
+#if defined (HAVE_PWD_H)
+# include <pwd.h>
+#endif
+#include "bashansi.h"
+#include "bashintl.h"
+
+#define NEED_XTRACE_SET_DECL
+
+#include "shell.h"
+#include "flags.h"
+#include "execute_cmd.h"
+#include "findcmd.h"
+#include "mailcheck.h"
+#include "input.h"
+#include "hashcmd.h"
+#include "pathexp.h"
+#include "alias.h"
+#include "jobs.h"
+
+#include "version.h"
+
+#include "builtins/getopt.h"
+#include "builtins/common.h"
+#include "builtins/builtext.h"
+
+#if defined (READLINE)
+# include "bashline.h"
+# include <readline/readline.h>
+#else
+# include <tilde/tilde.h>
+#endif
+
+#if defined (HISTORY)
+# include "bashhist.h"
+# include <readline/history.h>
+#endif /* HISTORY */
+
+#if defined (PROGRAMMABLE_COMPLETION)
+# include "pcomplete.h"
+#endif
+
+#define TEMPENV_HASH_BUCKETS 4 /* must be power of two */
+
+#define ifsname(s) ((s)[0] == 'I' && (s)[1] == 'F' && (s)[2] == 'S' && (s)[3] == '\0')
+
+extern char **environ;
+
+/* Variables used here and defined in other files. */
+extern int posixly_correct;
+extern int line_number, line_number_base;
+extern int subshell_environment, indirection_level, subshell_level;
+extern int build_version, patch_level;
+extern int expanding_redir;
+extern int last_command_exit_value;
+extern char *dist_version, *release_status;
+extern char *shell_name;
+extern char *primary_prompt, *secondary_prompt;
+extern char *current_host_name;
+extern sh_builtin_func_t *this_shell_builtin;
+extern SHELL_VAR *this_shell_function;
+extern char *the_printed_command_except_trap;
+extern char *this_command_name;
+extern char *command_execution_string;
+extern time_t shell_start_time;
+extern int assigning_in_environment;
+extern int executing_builtin;
+extern int funcnest_max;
+
+#if defined (READLINE)
+extern int no_line_editing;
+extern int perform_hostname_completion;
+#endif
+
+/* The list of shell variables that the user has created at the global
+ scope, or that came from the environment. */
+VAR_CONTEXT *global_variables = (VAR_CONTEXT *)NULL;
+
+/* The current list of shell variables, including function scopes */
+VAR_CONTEXT *shell_variables = (VAR_CONTEXT *)NULL;
+
+/* The list of shell functions that the user has created, or that came from
+ the environment. */
+HASH_TABLE *shell_functions = (HASH_TABLE *)NULL;
+
+#if defined (DEBUGGER)
+/* The table of shell function definitions that the user defined or that
+ came from the environment. */
+HASH_TABLE *shell_function_defs = (HASH_TABLE *)NULL;
+#endif
+
+/* The current variable context. This is really a count of how deep into
+ executing functions we are. */
+int variable_context = 0;
+
+/* The set of shell assignments which are made only in the environment
+ for a single command. */
+HASH_TABLE *temporary_env = (HASH_TABLE *)NULL;
+
+/* Set to non-zero if an assignment error occurs while putting variables
+ into the temporary environment. */
+int tempenv_assign_error;
+
+/* Some funky variables which are known about specially. Here is where
+ "$*", "$1", and all the cruft is kept. */
+char *dollar_vars[10];
+WORD_LIST *rest_of_args = (WORD_LIST *)NULL;
+
+/* The value of $$. */
+pid_t dollar_dollar_pid;
+
+/* Non-zero means that we have to remake EXPORT_ENV. */
+int array_needs_making = 1;
+
+/* The number of times BASH has been executed. This is set
+ by initialize_variables (). */
+int shell_level = 0;
+
+/* An array which is passed to commands as their environment. It is
+ manufactured from the union of the initial environment and the
+ shell variables that are marked for export. */
+char **export_env = (char **)NULL;
+static int export_env_index;
+static int export_env_size;
+
+#if defined (READLINE)
+static int winsize_assignment; /* currently assigning to LINES or COLUMNS */
+#endif
+
+static HASH_TABLE *last_table_searched; /* hash_lookup sets this */
+
+/* Some forward declarations. */
+static void create_variable_tables __P((void));
+
+static void set_machine_vars __P((void));
+static void set_home_var __P((void));
+static void set_shell_var __P((void));
+static char *get_bash_name __P((void));
+static void initialize_shell_level __P((void));
+static void uidset __P((void));
+#if defined (ARRAY_VARS)
+static void make_vers_array __P((void));
+#endif
+
+static SHELL_VAR *null_assign __P((SHELL_VAR *, char *, arrayind_t, char *));
+#if defined (ARRAY_VARS)
+static SHELL_VAR *null_array_assign __P((SHELL_VAR *, char *, arrayind_t, char *));
+#endif
+static SHELL_VAR *get_self __P((SHELL_VAR *));
+
+#if defined (ARRAY_VARS)
+static SHELL_VAR *init_dynamic_array_var __P((char *, sh_var_value_func_t *, sh_var_assign_func_t *, int));
+static SHELL_VAR *init_dynamic_assoc_var __P((char *, sh_var_value_func_t *, sh_var_assign_func_t *, int));
+#endif
+
+static SHELL_VAR *assign_seconds __P((SHELL_VAR *, char *, arrayind_t, char *));
+static SHELL_VAR *get_seconds __P((SHELL_VAR *));
+static SHELL_VAR *init_seconds_var __P((void));
+
+static int brand __P((void));
+static void sbrand __P((unsigned long)); /* set bash random number generator. */
+static void seedrand __P((void)); /* seed generator randomly */
+static SHELL_VAR *assign_random __P((SHELL_VAR *, char *, arrayind_t, char *));
+static SHELL_VAR *get_random __P((SHELL_VAR *));
+
+static SHELL_VAR *assign_lineno __P((SHELL_VAR *, char *, arrayind_t, char *));
+static SHELL_VAR *get_lineno __P((SHELL_VAR *));
+
+static SHELL_VAR *assign_subshell __P((SHELL_VAR *, char *, arrayind_t, char *));
+static SHELL_VAR *get_subshell __P((SHELL_VAR *));
+
+static SHELL_VAR *get_bashpid __P((SHELL_VAR *));
+
+#if defined (HISTORY)
+static SHELL_VAR *get_histcmd __P((SHELL_VAR *));
+#endif
+
+#if defined (READLINE)
+static SHELL_VAR *get_comp_wordbreaks __P((SHELL_VAR *));
+static SHELL_VAR *assign_comp_wordbreaks __P((SHELL_VAR *, char *, arrayind_t, char *));
+#endif
+
+#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
+static SHELL_VAR *assign_dirstack __P((SHELL_VAR *, char *, arrayind_t, char *));
+static SHELL_VAR *get_dirstack __P((SHELL_VAR *));
+#endif
+
+#if defined (ARRAY_VARS)
+static SHELL_VAR *get_groupset __P((SHELL_VAR *));
+
+static SHELL_VAR *build_hashcmd __P((SHELL_VAR *));
+static SHELL_VAR *get_hashcmd __P((SHELL_VAR *));
+static SHELL_VAR *assign_hashcmd __P((SHELL_VAR *, char *, arrayind_t, char *));
+# if defined (ALIAS)
+static SHELL_VAR *build_aliasvar __P((SHELL_VAR *));
+static SHELL_VAR *get_aliasvar __P((SHELL_VAR *));
+static SHELL_VAR *assign_aliasvar __P((SHELL_VAR *, char *, arrayind_t, char *));
+# endif
+#endif
+
+static SHELL_VAR *get_funcname __P((SHELL_VAR *));
+static SHELL_VAR *init_funcname_var __P((void));
+
+static void initialize_dynamic_variables __P((void));
+
+static SHELL_VAR *hash_lookup __P((const char *, HASH_TABLE *));
+static SHELL_VAR *new_shell_variable __P((const char *));
+static SHELL_VAR *make_new_variable __P((const char *, HASH_TABLE *));
+static SHELL_VAR *bind_variable_internal __P((const char *, char *, HASH_TABLE *, int, int));
+
+static void dispose_variable_value __P((SHELL_VAR *));
+static void free_variable_hash_data __P((PTR_T));
+
+static VARLIST *vlist_alloc __P((int));
+static VARLIST *vlist_realloc __P((VARLIST *, int));
+static void vlist_add __P((VARLIST *, SHELL_VAR *, int));
+
+static void flatten __P((HASH_TABLE *, sh_var_map_func_t *, VARLIST *, int));
+
+static int qsort_var_comp __P((SHELL_VAR **, SHELL_VAR **));
+
+static SHELL_VAR **vapply __P((sh_var_map_func_t *));
+static SHELL_VAR **fapply __P((sh_var_map_func_t *));
+
+static int visible_var __P((SHELL_VAR *));
+static int visible_and_exported __P((SHELL_VAR *));
+static int export_environment_candidate __P((SHELL_VAR *));
+static int local_and_exported __P((SHELL_VAR *));
+static int variable_in_context __P((SHELL_VAR *));
+#if defined (ARRAY_VARS)
+static int visible_array_vars __P((SHELL_VAR *));
+#endif
+
+static SHELL_VAR *find_nameref_at_context __P((SHELL_VAR *, VAR_CONTEXT *));
+static SHELL_VAR *find_variable_nameref_context __P((SHELL_VAR *, VAR_CONTEXT *, VAR_CONTEXT **));
+static SHELL_VAR *find_variable_last_nameref_context __P((SHELL_VAR *, VAR_CONTEXT *, VAR_CONTEXT **));
+
+static SHELL_VAR *bind_tempenv_variable __P((const char *, char *));
+static void push_temp_var __P((PTR_T));
+static void propagate_temp_var __P((PTR_T));
+static void dispose_temporary_env __P((sh_free_func_t *));
+
+static inline char *mk_env_string __P((const char *, const char *));
+static char **make_env_array_from_var_list __P((SHELL_VAR **));
+static char **make_var_export_array __P((VAR_CONTEXT *));
+static char **make_func_export_array __P((void));
+static void add_temp_array_to_env __P((char **, int, int));
+
+static int n_shell_variables __P((void));
+static int set_context __P((SHELL_VAR *));
+
+static void push_func_var __P((PTR_T));
+static void push_exported_var __P((PTR_T));
+
+static inline int find_special_var __P((const char *));
+
+static void
+create_variable_tables ()
+{
+ if (shell_variables == 0)
+ {
+ shell_variables = global_variables = new_var_context ((char *)NULL, 0);
+ shell_variables->scope = 0;
+ shell_variables->table = hash_create (0);
+ }
+
+ if (shell_functions == 0)
+ shell_functions = hash_create (0);
+
+#if defined (DEBUGGER)
+ if (shell_function_defs == 0)
+ shell_function_defs = hash_create (0);
+#endif
+}
+
+/* Initialize the shell variables from the current environment.
+ If PRIVMODE is nonzero, don't import functions from ENV or
+ parse $SHELLOPTS. */
+void
+initialize_shell_variables (env, privmode)
+ char **env;
+ int privmode;
+{
+ char *name, *string, *temp_string;
+ int c, char_index, string_index, string_length, ro;
+ SHELL_VAR *temp_var;
+
+ create_variable_tables ();
+
+ for (string_index = 0; string = env[string_index++]; )
+ {
+ char_index = 0;
+ name = string;
+ while ((c = *string++) && c != '=')
+ ;
+ if (string[-1] == '=')
+ char_index = string - name - 1;
+
+ /* If there are weird things in the environment, like `=xxx' or a
+ string without an `=', just skip them. */
+ if (char_index == 0)
+ continue;
+
+ /* ASSERT(name[char_index] == '=') */
+ name[char_index] = '\0';
+ /* Now, name = env variable name, string = env variable value, and
+ char_index == strlen (name) */
+
+ temp_var = (SHELL_VAR *)NULL;
+
+ /* If exported function, define it now. Don't import functions from
+ the environment in privileged mode. */
+ if (privmode == 0 && read_but_dont_execute == 0 && STREQN ("() {", string, 4))
+ {
+ string_length = strlen (string);
+ temp_string = (char *)xmalloc (3 + string_length + char_index);
+
+ strcpy (temp_string, name);
+ temp_string[char_index] = ' ';
+ strcpy (temp_string + char_index + 1, string);
+
+ if (posixly_correct == 0 || legal_identifier (name))
+ parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST);
+
+ /* Ancient backwards compatibility. Old versions of bash exported
+ functions like name()=() {...} */
+ if (name[char_index - 1] == ')' && name[char_index - 2] == '(')
+ name[char_index - 2] = '\0';
+
+ if (temp_var = find_function (name))
+ {
+ VSETATTR (temp_var, (att_exported|att_imported));
+ array_needs_making = 1;
+ }
+ else
+ {
+ if (temp_var = bind_variable (name, string, 0))
+ {
+ VSETATTR (temp_var, (att_exported | att_imported | att_invisible));
+ array_needs_making = 1;
+ }
+ last_command_exit_value = 1;
+ report_error (_("error importing function definition for `%s'"), name);
+ }
+
+ /* ( */
+ if (name[char_index - 1] == ')' && name[char_index - 2] == '\0')
+ name[char_index - 2] = '('; /* ) */
+ }
+#if defined (ARRAY_VARS)
+# if ARRAY_EXPORT
+ /* Array variables may not yet be exported. */
+ else if (*string == '(' && string[1] == '[' && string[strlen (string) - 1] == ')')
+ {
+ string_length = 1;
+ temp_string = extract_array_assignment_list (string, &string_length);
+ temp_var = assign_array_from_string (name, temp_string);
+ FREE (temp_string);
+ VSETATTR (temp_var, (att_exported | att_imported));
+ array_needs_making = 1;
+ }
+# endif /* ARRAY_EXPORT */
+#endif
+#if 0
+ else if (legal_identifier (name))
+#else
+ else
+#endif
+ {
+ ro = 0;
+ if (posixly_correct && STREQ (name, "SHELLOPTS"))
+ {
+ temp_var = find_variable ("SHELLOPTS");
+ ro = temp_var && readonly_p (temp_var);
+ if (temp_var)
+ VUNSETATTR (temp_var, att_readonly);
+ }
+ temp_var = bind_variable (name, string, 0);
+ if (temp_var)
+ {
+ if (legal_identifier (name))
+ VSETATTR (temp_var, (att_exported | att_imported));
+ else
+ VSETATTR (temp_var, (att_exported | att_imported | att_invisible));
+ if (ro)
+ VSETATTR (temp_var, att_readonly);
+ array_needs_making = 1;
+ }
+ }
+
+ name[char_index] = '=';
+ /* temp_var can be NULL if it was an exported function with a syntax
+ error (a different bug, but it still shouldn't dump core). */
+ if (temp_var && function_p (temp_var) == 0) /* XXX not yet */
+ {
+ CACHE_IMPORTSTR (temp_var, name);
+ }
+ }
+
+ set_pwd ();
+
+ /* Set up initial value of $_ */
+ temp_var = set_if_not ("_", dollar_vars[0]);
+
+ /* Remember this pid. */
+ dollar_dollar_pid = getpid ();
+
+ /* Now make our own defaults in case the vars that we think are
+ important are missing. */
+ temp_var = set_if_not ("PATH", DEFAULT_PATH_VALUE);
+#if 0
+ set_auto_export (temp_var); /* XXX */
+#endif
+
+ temp_var = set_if_not ("TERM", "dumb");
+#if 0
+ set_auto_export (temp_var); /* XXX */
+#endif
+
+#if defined (__QNX__)
+ /* set node id -- don't import it from the environment */
+ {
+ char node_name[22];
+# if defined (__QNXNTO__)
+ netmgr_ndtostr(ND2S_LOCAL_STR, ND_LOCAL_NODE, node_name, sizeof(node_name));
+# else
+ qnx_nidtostr (getnid (), node_name, sizeof (node_name));
+# endif
+ temp_var = bind_variable ("NODE", node_name, 0);
+ set_auto_export (temp_var);
+ }
+#endif
+
+ /* set up the prompts. */
+ if (interactive_shell)
+ {
+#if defined (PROMPT_STRING_DECODE)
+ set_if_not ("PS1", primary_prompt);
+#else
+ if (current_user.uid == -1)
+ get_current_user_info ();
+ set_if_not ("PS1", current_user.euid == 0 ? "# " : primary_prompt);
+#endif
+ set_if_not ("PS2", secondary_prompt);
+ }
+ set_if_not ("PS4", "+ ");
+
+ /* Don't allow IFS to be imported from the environment. */
+ temp_var = bind_variable ("IFS", " \t\n", 0);
+ setifs (temp_var);
+
+ /* Magic machine types. Pretty convenient. */
+ set_machine_vars ();
+
+ /* Default MAILCHECK for interactive shells. Defer the creation of a
+ default MAILPATH until the startup files are read, because MAIL
+ names a mail file if MAILPATH is not set, and we should provide a
+ default only if neither is set. */
+ if (interactive_shell)
+ {
+ temp_var = set_if_not ("MAILCHECK", posixly_correct ? "600" : "60");
+ VSETATTR (temp_var, att_integer);
+ }
+
+ /* Do some things with shell level. */
+ initialize_shell_level ();
+
+ set_ppid ();
+
+ /* Initialize the `getopts' stuff. */
+ temp_var = bind_variable ("OPTIND", "1", 0);
+ VSETATTR (temp_var, att_integer);
+ getopts_reset (0);
+ bind_variable ("OPTERR", "1", 0);
+ sh_opterr = 1;
+
+ if (login_shell == 1 && posixly_correct == 0)
+ set_home_var ();
+
+ /* Get the full pathname to THIS shell, and set the BASH variable
+ to it. */
+ name = get_bash_name ();
+ temp_var = bind_variable ("BASH", name, 0);
+ free (name);
+
+ /* Make the exported environment variable SHELL be the user's login
+ shell. Note that the `tset' command looks at this variable
+ to determine what style of commands to output; if it ends in "csh",
+ then C-shell commands are output, else Bourne shell commands. */
+ set_shell_var ();
+
+ /* Make a variable called BASH_VERSION which contains the version info. */
+ bind_variable ("BASH_VERSION", shell_version_string (), 0);
+#if defined (ARRAY_VARS)
+ make_vers_array ();
+#endif
+
+ if (command_execution_string)
+ bind_variable ("BASH_EXECUTION_STRING", command_execution_string, 0);
+
+ /* Find out if we're supposed to be in Posix.2 mode via an
+ environment variable. */
+ temp_var = find_variable ("POSIXLY_CORRECT");
+ if (!temp_var)
+ temp_var = find_variable ("POSIX_PEDANTIC");
+ if (temp_var && imported_p (temp_var))
+ sv_strict_posix (temp_var->name);
+
+#if defined (HISTORY)
+ /* Set history variables to defaults, and then do whatever we would
+ do if the variable had just been set. Do this only in the case
+ that we are remembering commands on the history list. */
+ if (remember_on_history)
+ {
+ name = bash_tilde_expand (posixly_correct ? "~/.sh_history" : "~/.bash_history", 0);
+
+ set_if_not ("HISTFILE", name);
+ free (name);
+ }
+#endif /* HISTORY */
+
+ /* Seed the random number generator. */
+ seedrand ();
+
+ /* Handle some "special" variables that we may have inherited from a
+ parent shell. */
+ if (interactive_shell)
+ {
+ temp_var = find_variable ("IGNOREEOF");
+ if (!temp_var)
+ temp_var = find_variable ("ignoreeof");
+ if (temp_var && imported_p (temp_var))
+ sv_ignoreeof (temp_var->name);
+ }
+
+#if defined (HISTORY)
+ if (interactive_shell && remember_on_history)
+ {
+ sv_history_control ("HISTCONTROL");
+ sv_histignore ("HISTIGNORE");
+ sv_histtimefmt ("HISTTIMEFORMAT");
+ }
+#endif /* HISTORY */
+
+#if defined (READLINE) && defined (STRICT_POSIX)
+ /* POSIXLY_CORRECT will only be 1 here if the shell was compiled
+ -DSTRICT_POSIX */
+ if (interactive_shell && posixly_correct && no_line_editing == 0)
+ rl_prefer_env_winsize = 1;
+#endif /* READLINE && STRICT_POSIX */
+
+ /*
+ * 24 October 2001
+ *
+ * I'm tired of the arguing and bug reports. Bash now leaves SSH_CLIENT
+ * and SSH2_CLIENT alone. I'm going to rely on the shell_level check in
+ * isnetconn() to avoid running the startup files more often than wanted.
+ * That will, of course, only work if the user's login shell is bash, so
+ * I've made that behavior conditional on SSH_SOURCE_BASHRC being defined
+ * in config-top.h.
+ */
+#if 0
+ temp_var = find_variable ("SSH_CLIENT");
+ if (temp_var && imported_p (temp_var))
+ {
+ VUNSETATTR (temp_var, att_exported);
+ array_needs_making = 1;
+ }
+ temp_var = find_variable ("SSH2_CLIENT");
+ if (temp_var && imported_p (temp_var))
+ {
+ VUNSETATTR (temp_var, att_exported);
+ array_needs_making = 1;
+ }
+#endif
+
+ /* Get the user's real and effective user ids. */
+ uidset ();
+
+ temp_var = find_variable ("BASH_XTRACEFD");
+ if (temp_var && imported_p (temp_var))
+ sv_xtracefd (temp_var->name);
+
+ /* Initialize the dynamic variables, and seed their values. */
+ initialize_dynamic_variables ();
+}
+
+/* **************************************************************** */
+/* */
+/* Setting values for special shell variables */
+/* */
+/* **************************************************************** */
+
+static void
+set_machine_vars ()
+{
+ SHELL_VAR *temp_var;
+
+ temp_var = set_if_not ("HOSTTYPE", HOSTTYPE);
+ temp_var = set_if_not ("OSTYPE", OSTYPE);
+ temp_var = set_if_not ("MACHTYPE", MACHTYPE);
+
+ temp_var = set_if_not ("HOSTNAME", current_host_name);
+}
+
+/* Set $HOME to the information in the password file if we didn't get
+ it from the environment. */
+
+/* This function is not static so the tilde and readline libraries can
+ use it. */
+char *
+sh_get_home_dir ()
+{
+ if (current_user.home_dir == 0)
+ get_current_user_info ();
+ return current_user.home_dir;
+}
+
+static void
+set_home_var ()
+{
+ SHELL_VAR *temp_var;
+
+ temp_var = find_variable ("HOME");
+ if (temp_var == 0)
+ temp_var = bind_variable ("HOME", sh_get_home_dir (), 0);
+#if 0
+ VSETATTR (temp_var, att_exported);
+#endif
+}
+
+/* Set $SHELL to the user's login shell if it is not already set. Call
+ get_current_user_info if we haven't already fetched the shell. */
+static void
+set_shell_var ()
+{
+ SHELL_VAR *temp_var;
+
+ temp_var = find_variable ("SHELL");
+ if (temp_var == 0)
+ {
+ if (current_user.shell == 0)
+ get_current_user_info ();
+ temp_var = bind_variable ("SHELL", current_user.shell, 0);
+ }
+#if 0
+ VSETATTR (temp_var, att_exported);
+#endif
+}
+
+static char *
+get_bash_name ()
+{
+ char *name;
+
+ if ((login_shell == 1) && RELPATH(shell_name))
+ {
+ if (current_user.shell == 0)
+ get_current_user_info ();
+ name = savestring (current_user.shell);
+ }
+ else if (ABSPATH(shell_name))
+ name = savestring (shell_name);
+ else if (shell_name[0] == '.' && shell_name[1] == '/')
+ {
+ /* Fast path for common case. */
+ char *cdir;
+ int len;
+
+ cdir = get_string_value ("PWD");
+ if (cdir)
+ {
+ len = strlen (cdir);
+ name = (char *)xmalloc (len + strlen (shell_name) + 1);
+ strcpy (name, cdir);
+ strcpy (name + len, shell_name + 1);
+ }
+ else
+ name = savestring (shell_name);
+ }
+ else
+ {
+ char *tname;
+ int s;
+
+ tname = find_user_command (shell_name);
+
+ if (tname == 0)
+ {
+ /* Try the current directory. If there is not an executable
+ there, just punt and use the login shell. */
+ s = file_status (shell_name);
+ if (s & FS_EXECABLE)
+ {
+ tname = make_absolute (shell_name, get_string_value ("PWD"));
+ if (*shell_name == '.')
+ {
+ name = sh_canonpath (tname, PATH_CHECKDOTDOT|PATH_CHECKEXISTS);
+ if (name == 0)
+ name = tname;
+ else
+ free (tname);
+ }
+ else
+ name = tname;
+ }
+ else
+ {
+ if (current_user.shell == 0)
+ get_current_user_info ();
+ name = savestring (current_user.shell);
+ }
+ }
+ else
+ {
+ name = full_pathname (tname);
+ free (tname);
+ }
+ }
+
+ return (name);
+}
+
+void
+adjust_shell_level (change)
+ int change;
+{
+ char new_level[5], *old_SHLVL;
+ intmax_t old_level;
+ SHELL_VAR *temp_var;
+
+ old_SHLVL = get_string_value ("SHLVL");
+ if (old_SHLVL == 0 || *old_SHLVL == '\0' || legal_number (old_SHLVL, &old_level) == 0)
+ old_level = 0;
+
+ shell_level = old_level + change;
+ if (shell_level < 0)
+ shell_level = 0;
+ else if (shell_level > 1000)
+ {
+ internal_warning (_("shell level (%d) too high, resetting to 1"), shell_level);
+ shell_level = 1;
+ }
+
+ /* We don't need the full generality of itos here. */
+ if (shell_level < 10)
+ {
+ new_level[0] = shell_level + '0';
+ new_level[1] = '\0';
+ }
+ else if (shell_level < 100)
+ {
+ new_level[0] = (shell_level / 10) + '0';
+ new_level[1] = (shell_level % 10) + '0';
+ new_level[2] = '\0';
+ }
+ else if (shell_level < 1000)
+ {
+ new_level[0] = (shell_level / 100) + '0';
+ old_level = shell_level % 100;
+ new_level[1] = (old_level / 10) + '0';
+ new_level[2] = (old_level % 10) + '0';
+ new_level[3] = '\0';
+ }
+
+ temp_var = bind_variable ("SHLVL", new_level, 0);
+ set_auto_export (temp_var);
+}
+
+static void
+initialize_shell_level ()
+{
+ adjust_shell_level (1);
+}
+
+/* If we got PWD from the environment, update our idea of the current
+ working directory. In any case, make sure that PWD exists before
+ checking it. It is possible for getcwd () to fail on shell startup,
+ and in that case, PWD would be undefined. If this is an interactive
+ login shell, see if $HOME is the current working directory, and if
+ that's not the same string as $PWD, set PWD=$HOME. */
+
+void
+set_pwd ()
+{
+ SHELL_VAR *temp_var, *home_var;
+ char *temp_string, *home_string;
+
+ home_var = find_variable ("HOME");
+ home_string = home_var ? value_cell (home_var) : (char *)NULL;
+
+ temp_var = find_variable ("PWD");
+ if (temp_var && imported_p (temp_var) &&
+ (temp_string = value_cell (temp_var)) &&
+ same_file (temp_string, ".", (struct stat *)NULL, (struct stat *)NULL))
+ set_working_directory (temp_string);
+ else if (home_string && interactive_shell && login_shell &&
+ same_file (home_string, ".", (struct stat *)NULL, (struct stat *)NULL))
+ {
+ set_working_directory (home_string);
+ temp_var = bind_variable ("PWD", home_string, 0);
+ set_auto_export (temp_var);
+ }
+ else
+ {
+ temp_string = get_working_directory ("shell-init");
+ if (temp_string)
+ {
+ temp_var = bind_variable ("PWD", temp_string, 0);
+ set_auto_export (temp_var);
+ free (temp_string);
+ }
+ }
+
+ /* According to the Single Unix Specification, v2, $OLDPWD is an
+ `environment variable' and therefore should be auto-exported.
+ Make a dummy invisible variable for OLDPWD, and mark it as exported. */
+ temp_var = bind_variable ("OLDPWD", (char *)NULL, 0);
+ VSETATTR (temp_var, (att_exported | att_invisible));
+}
+
+/* Make a variable $PPID, which holds the pid of the shell's parent. */
+void
+set_ppid ()
+{
+ char namebuf[INT_STRLEN_BOUND(pid_t) + 1], *name;
+ SHELL_VAR *temp_var;
+
+ name = inttostr (getppid (), namebuf, sizeof(namebuf));
+ temp_var = find_variable ("PPID");
+ if (temp_var)
+ VUNSETATTR (temp_var, (att_readonly | att_exported));
+ temp_var = bind_variable ("PPID", name, 0);
+ VSETATTR (temp_var, (att_readonly | att_integer));
+}
+
+static void
+uidset ()
+{
+ char buff[INT_STRLEN_BOUND(uid_t) + 1], *b;
+ register SHELL_VAR *v;
+
+ b = inttostr (current_user.uid, buff, sizeof (buff));
+ v = find_variable ("UID");
+ if (v == 0)
+ {
+ v = bind_variable ("UID", b, 0);
+ VSETATTR (v, (att_readonly | att_integer));
+ }
+
+ if (current_user.euid != current_user.uid)
+ b = inttostr (current_user.euid, buff, sizeof (buff));
+
+ v = find_variable ("EUID");
+ if (v == 0)
+ {
+ v = bind_variable ("EUID", b, 0);
+ VSETATTR (v, (att_readonly | att_integer));
+ }
+}
+
+#if defined (ARRAY_VARS)
+static void
+make_vers_array ()
+{
+ SHELL_VAR *vv;
+ ARRAY *av;
+ char *s, d[32], b[INT_STRLEN_BOUND(int) + 1];
+
+ unbind_variable ("BASH_VERSINFO");
+
+ vv = make_new_array_variable ("BASH_VERSINFO");
+ av = array_cell (vv);
+ strcpy (d, dist_version);
+ s = strchr (d, '.');
+ if (s)
+ *s++ = '\0';
+ array_insert (av, 0, d);
+ array_insert (av, 1, s);
+ s = inttostr (patch_level, b, sizeof (b));
+ array_insert (av, 2, s);
+ s = inttostr (build_version, b, sizeof (b));
+ array_insert (av, 3, s);
+ array_insert (av, 4, release_status);
+ array_insert (av, 5, MACHTYPE);
+
+ VSETATTR (vv, att_readonly);
+}
+#endif /* ARRAY_VARS */
+
+/* Set the environment variables $LINES and $COLUMNS in response to
+ a window size change. */
+void
+sh_set_lines_and_columns (lines, cols)
+ int lines, cols;
+{
+ char val[INT_STRLEN_BOUND(int) + 1], *v;
+
+#if defined (READLINE)
+ /* If we are currently assigning to LINES or COLUMNS, don't do anything. */
+ if (winsize_assignment)
+ return;
+#endif
+
+ v = inttostr (lines, val, sizeof (val));
+ bind_variable ("LINES", v, 0);
+
+ v = inttostr (cols, val, sizeof (val));
+ bind_variable ("COLUMNS", v, 0);
+}
+
+/* **************************************************************** */
+/* */
+/* Printing variables and values */
+/* */
+/* **************************************************************** */
+
+/* Print LIST (a list of shell variables) to stdout in such a way that
+ they can be read back in. */
+void
+print_var_list (list)
+ register SHELL_VAR **list;
+{
+ register int i;
+ register SHELL_VAR *var;
+
+ for (i = 0; list && (var = list[i]); i++)
+ if (invisible_p (var) == 0)
+ print_assignment (var);
+}
+
+/* Print LIST (a list of shell functions) to stdout in such a way that
+ they can be read back in. */
+void
+print_func_list (list)
+ register SHELL_VAR **list;
+{
+ register int i;
+ register SHELL_VAR *var;
+
+ for (i = 0; list && (var = list[i]); i++)
+ {
+ printf ("%s ", var->name);
+ print_var_function (var);
+ printf ("\n");
+ }
+}
+
+/* Print the value of a single SHELL_VAR. No newline is
+ output, but the variable is printed in such a way that
+ it can be read back in. */
+void
+print_assignment (var)
+ SHELL_VAR *var;
+{
+ if (var_isset (var) == 0)
+ return;
+
+ if (function_p (var))
+ {
+ printf ("%s", var->name);
+ print_var_function (var);
+ printf ("\n");
+ }
+#if defined (ARRAY_VARS)
+ else if (array_p (var))
+ print_array_assignment (var, 0);
+ else if (assoc_p (var))
+ print_assoc_assignment (var, 0);
+#endif /* ARRAY_VARS */
+ else
+ {
+ printf ("%s=", var->name);
+ print_var_value (var, 1);
+ printf ("\n");
+ }
+}
+
+/* Print the value cell of VAR, a shell variable. Do not print
+ the name, nor leading/trailing newline. If QUOTE is non-zero,
+ and the value contains shell metacharacters, quote the value
+ in such a way that it can be read back in. */
+void
+print_var_value (var, quote)
+ SHELL_VAR *var;
+ int quote;
+{
+ char *t;
+
+ if (var_isset (var) == 0)
+ return;
+
+ if (quote && posixly_correct == 0 && ansic_shouldquote (value_cell (var)))
+ {
+ t = ansic_quote (value_cell (var), 0, (int *)0);
+ printf ("%s", t);
+ free (t);
+ }
+ else if (quote && sh_contains_shell_metas (value_cell (var)))
+ {
+ t = sh_single_quote (value_cell (var));
+ printf ("%s", t);
+ free (t);
+ }
+ else
+ printf ("%s", value_cell (var));
+}
+
+/* Print the function cell of VAR, a shell variable. Do not
+ print the name, nor leading/trailing newline. */
+void
+print_var_function (var)
+ SHELL_VAR *var;
+{
+ char *x;
+
+ if (function_p (var) && var_isset (var))
+ {
+ x = named_function_string ((char *)NULL, function_cell(var), FUNC_MULTILINE|FUNC_EXTERNAL);
+ printf ("%s", x);
+ }
+}
+
+/* **************************************************************** */
+/* */
+/* Dynamic Variables */
+/* */
+/* **************************************************************** */
+
+/* DYNAMIC VARIABLES
+
+ These are variables whose values are generated anew each time they are
+ referenced. These are implemented using a pair of function pointers
+ in the struct variable: assign_func, which is called from bind_variable
+ and, if arrays are compiled into the shell, some of the functions in
+ arrayfunc.c, and dynamic_value, which is called from find_variable.
+
+ assign_func is called from bind_variable_internal, if
+ bind_variable_internal discovers that the variable being assigned to
+ has such a function. The function is called as
+ SHELL_VAR *temp = (*(entry->assign_func)) (entry, value, ind)
+ and the (SHELL_VAR *)temp is returned as the value of bind_variable. It
+ is usually ENTRY (self). IND is an index for an array variable, and
+ unused otherwise.
+
+ dynamic_value is called from find_variable_internal to return a `new'
+ value for the specified dynamic varible. If this function is NULL,
+ the variable is treated as a `normal' shell variable. If it is not,
+ however, then this function is called like this:
+ tempvar = (*(var->dynamic_value)) (var);
+
+ Sometimes `tempvar' will replace the value of `var'. Other times, the
+ shell will simply use the string value. Pretty object-oriented, huh?
+
+ Be warned, though: if you `unset' a special variable, it loses its
+ special meaning, even if you subsequently set it.
+
+ The special assignment code would probably have been better put in
+ subst.c: do_assignment_internal, in the same style as
+ stupidly_hack_special_variables, but I wanted the changes as
+ localized as possible. */
+
+#define INIT_DYNAMIC_VAR(var, val, gfunc, afunc) \
+ do \
+ { \
+ v = bind_variable (var, (val), 0); \
+ v->dynamic_value = gfunc; \
+ v->assign_func = afunc; \
+ } \
+ while (0)
+
+#define INIT_DYNAMIC_ARRAY_VAR(var, gfunc, afunc) \
+ do \
+ { \
+ v = make_new_array_variable (var); \
+ v->dynamic_value = gfunc; \
+ v->assign_func = afunc; \
+ } \
+ while (0)
+
+#define INIT_DYNAMIC_ASSOC_VAR(var, gfunc, afunc) \
+ do \
+ { \
+ v = make_new_assoc_variable (var); \
+ v->dynamic_value = gfunc; \
+ v->assign_func = afunc; \
+ } \
+ while (0)
+
+static SHELL_VAR *
+null_assign (self, value, unused, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t unused;
+ char *key;
+{
+ return (self);
+}
+
+#if defined (ARRAY_VARS)
+static SHELL_VAR *
+null_array_assign (self, value, ind, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t ind;
+ char *key;
+{
+ return (self);
+}
+#endif
+
+/* Degenerate `dynamic_value' function; just returns what's passed without
+ manipulation. */
+static SHELL_VAR *
+get_self (self)
+ SHELL_VAR *self;
+{
+ return (self);
+}
+
+#if defined (ARRAY_VARS)
+/* A generic dynamic array variable initializer. Initialize array variable
+ NAME with dynamic value function GETFUNC and assignment function SETFUNC. */
+static SHELL_VAR *
+init_dynamic_array_var (name, getfunc, setfunc, attrs)
+ char *name;
+ sh_var_value_func_t *getfunc;
+ sh_var_assign_func_t *setfunc;
+ int attrs;
+{
+ SHELL_VAR *v;
+
+ v = find_variable (name);
+ if (v)
+ return (v);
+ INIT_DYNAMIC_ARRAY_VAR (name, getfunc, setfunc);
+ if (attrs)
+ VSETATTR (v, attrs);
+ return v;
+}
+
+static SHELL_VAR *
+init_dynamic_assoc_var (name, getfunc, setfunc, attrs)
+ char *name;
+ sh_var_value_func_t *getfunc;
+ sh_var_assign_func_t *setfunc;
+ int attrs;
+{
+ SHELL_VAR *v;
+
+ v = find_variable (name);
+ if (v)
+ return (v);
+ INIT_DYNAMIC_ASSOC_VAR (name, getfunc, setfunc);
+ if (attrs)
+ VSETATTR (v, attrs);
+ return v;
+}
+#endif
+
+/* The value of $SECONDS. This is the number of seconds since shell
+ invocation, or, the number of seconds since the last assignment + the
+ value of the last assignment. */
+static intmax_t seconds_value_assigned;
+
+static SHELL_VAR *
+assign_seconds (self, value, unused, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t unused;
+ char *key;
+{
+ if (legal_number (value, &seconds_value_assigned) == 0)
+ seconds_value_assigned = 0;
+ shell_start_time = NOW;
+ return (self);
+}
+
+static SHELL_VAR *
+get_seconds (var)
+ SHELL_VAR *var;
+{
+ time_t time_since_start;
+ char *p;
+
+ time_since_start = NOW - shell_start_time;
+ p = itos(seconds_value_assigned + time_since_start);
+
+ FREE (value_cell (var));
+
+ VSETATTR (var, att_integer);
+ var_setvalue (var, p);
+ return (var);
+}
+
+static SHELL_VAR *
+init_seconds_var ()
+{
+ SHELL_VAR *v;
+
+ v = find_variable ("SECONDS");
+ if (v)
+ {
+ if (legal_number (value_cell(v), &seconds_value_assigned) == 0)
+ seconds_value_assigned = 0;
+ }
+ INIT_DYNAMIC_VAR ("SECONDS", (v ? value_cell (v) : (char *)NULL), get_seconds, assign_seconds);
+ return v;
+}
+
+/* The random number seed. You can change this by setting RANDOM. */
+static unsigned long rseed = 1;
+static int last_random_value;
+static int seeded_subshell = 0;
+
+/* A linear congruential random number generator based on the example
+ one in the ANSI C standard. This one isn't very good, but a more
+ complicated one is overkill. */
+
+/* Returns a pseudo-random number between 0 and 32767. */
+static int
+brand ()
+{
+ /* From "Random number generators: good ones are hard to find",
+ Park and Miller, Communications of the ACM, vol. 31, no. 10,
+ October 1988, p. 1195. filtered through FreeBSD */
+ long h, l;
+
+ /* Can't seed with 0. */
+ if (rseed == 0)
+ rseed = 123459876;
+ h = rseed / 127773;
+ l = rseed % 127773;
+ rseed = 16807 * l - 2836 * h;
+#if 0
+ if (rseed < 0)
+ rseed += 0x7fffffff;
+#endif
+ return ((unsigned int)(rseed & 32767)); /* was % 32768 */
+}
+
+/* Set the random number generator seed to SEED. */
+static void
+sbrand (seed)
+ unsigned long seed;
+{
+ rseed = seed;
+ last_random_value = 0;
+}
+
+static void
+seedrand ()
+{
+ struct timeval tv;
+
+ gettimeofday (&tv, NULL);
+ sbrand (tv.tv_sec ^ tv.tv_usec ^ getpid ());
+}
+
+static SHELL_VAR *
+assign_random (self, value, unused, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t unused;
+ char *key;
+{
+ sbrand (strtoul (value, (char **)NULL, 10));
+ if (subshell_environment)
+ seeded_subshell = getpid ();
+ return (self);
+}
+
+int
+get_random_number ()
+{
+ int rv, pid;
+
+ /* Reset for command and process substitution. */
+ pid = getpid ();
+ if (subshell_environment && seeded_subshell != pid)
+ {
+ seedrand ();
+ seeded_subshell = pid;
+ }
+
+ do
+ rv = brand ();
+ while (rv == last_random_value);
+ return rv;
+}
+
+static SHELL_VAR *
+get_random (var)
+ SHELL_VAR *var;
+{
+ int rv;
+ char *p;
+
+ rv = get_random_number ();
+ last_random_value = rv;
+ p = itos (rv);
+
+ FREE (value_cell (var));
+
+ VSETATTR (var, att_integer);
+ var_setvalue (var, p);
+ return (var);
+}
+
+static SHELL_VAR *
+assign_lineno (var, value, unused, key)
+ SHELL_VAR *var;
+ char *value;
+ arrayind_t unused;
+ char *key;
+{
+ intmax_t new_value;
+
+ if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0)
+ new_value = 0;
+ line_number = line_number_base = new_value;
+ return var;
+}
+
+/* Function which returns the current line number. */
+static SHELL_VAR *
+get_lineno (var)
+ SHELL_VAR *var;
+{
+ char *p;
+ int ln;
+
+ ln = executing_line_number ();
+ p = itos (ln);
+ FREE (value_cell (var));
+ var_setvalue (var, p);
+ return (var);
+}
+
+static SHELL_VAR *
+assign_subshell (var, value, unused, key)
+ SHELL_VAR *var;
+ char *value;
+ arrayind_t unused;
+ char *key;
+{
+ intmax_t new_value;
+
+ if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0)
+ new_value = 0;
+ subshell_level = new_value;
+ return var;
+}
+
+static SHELL_VAR *
+get_subshell (var)
+ SHELL_VAR *var;
+{
+ char *p;
+
+ p = itos (subshell_level);
+ FREE (value_cell (var));
+ var_setvalue (var, p);
+ return (var);
+}
+
+static SHELL_VAR *
+get_bashpid (var)
+ SHELL_VAR *var;
+{
+ int pid;
+ char *p;
+
+ pid = getpid ();
+ p = itos (pid);
+
+ FREE (value_cell (var));
+ VSETATTR (var, att_integer|att_readonly);
+ var_setvalue (var, p);
+ return (var);
+}
+
+static SHELL_VAR *
+get_bash_command (var)
+ SHELL_VAR *var;
+{
+ char *p;
+
+ if (the_printed_command_except_trap)
+ p = savestring (the_printed_command_except_trap);
+ else
+ {
+ p = (char *)xmalloc (1);
+ p[0] = '\0';
+ }
+ FREE (value_cell (var));
+ var_setvalue (var, p);
+ return (var);
+}
+
+#if defined (HISTORY)
+static SHELL_VAR *
+get_histcmd (var)
+ SHELL_VAR *var;
+{
+ char *p;
+
+ p = itos (history_number ());
+ FREE (value_cell (var));
+ var_setvalue (var, p);
+ return (var);
+}
+#endif
+
+#if defined (READLINE)
+/* When this function returns, VAR->value points to malloced memory. */
+static SHELL_VAR *
+get_comp_wordbreaks (var)
+ SHELL_VAR *var;
+{
+ /* If we don't have anything yet, assign a default value. */
+ if (rl_completer_word_break_characters == 0 && bash_readline_initialized == 0)
+ enable_hostname_completion (perform_hostname_completion);
+
+ FREE (value_cell (var));
+ var_setvalue (var, savestring (rl_completer_word_break_characters));
+
+ return (var);
+}
+
+/* When this function returns, rl_completer_word_break_characters points to
+ malloced memory. */
+static SHELL_VAR *
+assign_comp_wordbreaks (self, value, unused, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t unused;
+ char *key;
+{
+ if (rl_completer_word_break_characters &&
+ rl_completer_word_break_characters != rl_basic_word_break_characters)
+ free (rl_completer_word_break_characters);
+
+ rl_completer_word_break_characters = savestring (value);
+ return self;
+}
+#endif /* READLINE */
+
+#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
+static SHELL_VAR *
+assign_dirstack (self, value, ind, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t ind;
+ char *key;
+{
+ set_dirstack_element (ind, 1, value);
+ return self;
+}
+
+static SHELL_VAR *
+get_dirstack (self)
+ SHELL_VAR *self;
+{
+ ARRAY *a;
+ WORD_LIST *l;
+
+ l = get_directory_stack (0);
+ a = array_from_word_list (l);
+ array_dispose (array_cell (self));
+ dispose_words (l);
+ var_setarray (self, a);
+ return self;
+}
+#endif /* PUSHD AND POPD && ARRAY_VARS */
+
+#if defined (ARRAY_VARS)
+/* We don't want to initialize the group set with a call to getgroups()
+ unless we're asked to, but we only want to do it once. */
+static SHELL_VAR *
+get_groupset (self)
+ SHELL_VAR *self;
+{
+ register int i;
+ int ng;
+ ARRAY *a;
+ static char **group_set = (char **)NULL;
+
+ if (group_set == 0)
+ {
+ group_set = get_group_list (&ng);
+ a = array_cell (self);
+ for (i = 0; i < ng; i++)
+ array_insert (a, i, group_set[i]);
+ }
+ return (self);
+}
+
+static SHELL_VAR *
+build_hashcmd (self)
+ SHELL_VAR *self;
+{
+ HASH_TABLE *h;
+ int i;
+ char *k, *v;
+ BUCKET_CONTENTS *item;
+
+ h = assoc_cell (self);
+ if (h)
+ assoc_dispose (h);
+
+ if (hashed_filenames == 0 || HASH_ENTRIES (hashed_filenames) == 0)
+ {
+ var_setvalue (self, (char *)NULL);
+ return self;
+ }
+
+ h = assoc_create (hashed_filenames->nbuckets);
+ for (i = 0; i < hashed_filenames->nbuckets; i++)
+ {
+ for (item = hash_items (i, hashed_filenames); item; item = item->next)
+ {
+ k = savestring (item->key);
+ v = pathdata(item)->path;
+ assoc_insert (h, k, v);
+ }
+ }
+
+ var_setvalue (self, (char *)h);
+ return self;
+}
+
+static SHELL_VAR *
+get_hashcmd (self)
+ SHELL_VAR *self;
+{
+ build_hashcmd (self);
+ return (self);
+}
+
+static SHELL_VAR *
+assign_hashcmd (self, value, ind, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t ind;
+ char *key;
+{
+ phash_insert (key, value, 0, 0);
+ return (build_hashcmd (self));
+}
+
+#if defined (ALIAS)
+static SHELL_VAR *
+build_aliasvar (self)
+ SHELL_VAR *self;
+{
+ HASH_TABLE *h;
+ int i;
+ char *k, *v;
+ BUCKET_CONTENTS *item;
+
+ h = assoc_cell (self);
+ if (h)
+ assoc_dispose (h);
+
+ if (aliases == 0 || HASH_ENTRIES (aliases) == 0)
+ {
+ var_setvalue (self, (char *)NULL);
+ return self;
+ }
+
+ h = assoc_create (aliases->nbuckets);
+ for (i = 0; i < aliases->nbuckets; i++)
+ {
+ for (item = hash_items (i, aliases); item; item = item->next)
+ {
+ k = savestring (item->key);
+ v = ((alias_t *)(item->data))->value;
+ assoc_insert (h, k, v);
+ }
+ }
+
+ var_setvalue (self, (char *)h);
+ return self;
+}
+
+static SHELL_VAR *
+get_aliasvar (self)
+ SHELL_VAR *self;
+{
+ build_aliasvar (self);
+ return (self);
+}
+
+static SHELL_VAR *
+assign_aliasvar (self, value, ind, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t ind;
+ char *key;
+{
+ add_alias (key, value);
+ return (build_aliasvar (self));
+}
+#endif /* ALIAS */
+
+#endif /* ARRAY_VARS */
+
+/* If ARRAY_VARS is not defined, this just returns the name of any
+ currently-executing function. If we have arrays, it's a call stack. */
+static SHELL_VAR *
+get_funcname (self)
+ SHELL_VAR *self;
+{
+#if ! defined (ARRAY_VARS)
+ char *t;
+ if (variable_context && this_shell_function)
+ {
+ FREE (value_cell (self));
+ t = savestring (this_shell_function->name);
+ var_setvalue (self, t);
+ }
+#endif
+ return (self);
+}
+
+void
+make_funcname_visible (on_or_off)
+ int on_or_off;
+{
+ SHELL_VAR *v;
+
+ v = find_variable ("FUNCNAME");
+ if (v == 0 || v->dynamic_value == 0)
+ return;
+
+ if (on_or_off)
+ VUNSETATTR (v, att_invisible);
+ else
+ VSETATTR (v, att_invisible);
+}
+
+static SHELL_VAR *
+init_funcname_var ()
+{
+ SHELL_VAR *v;
+
+ v = find_variable ("FUNCNAME");
+ if (v)
+ return v;
+#if defined (ARRAY_VARS)
+ INIT_DYNAMIC_ARRAY_VAR ("FUNCNAME", get_funcname, null_array_assign);
+#else
+ INIT_DYNAMIC_VAR ("FUNCNAME", (char *)NULL, get_funcname, null_assign);
+#endif
+ VSETATTR (v, att_invisible|att_noassign);
+ return v;
+}
+
+static void
+initialize_dynamic_variables ()
+{
+ SHELL_VAR *v;
+
+ v = init_seconds_var ();
+
+ INIT_DYNAMIC_VAR ("BASH_COMMAND", (char *)NULL, get_bash_command, (sh_var_assign_func_t *)NULL);
+ INIT_DYNAMIC_VAR ("BASH_SUBSHELL", (char *)NULL, get_subshell, assign_subshell);
+
+ INIT_DYNAMIC_VAR ("RANDOM", (char *)NULL, get_random, assign_random);
+ VSETATTR (v, att_integer);
+ INIT_DYNAMIC_VAR ("LINENO", (char *)NULL, get_lineno, assign_lineno);
+ VSETATTR (v, att_integer);
+
+ INIT_DYNAMIC_VAR ("BASHPID", (char *)NULL, get_bashpid, null_assign);
+ VSETATTR (v, att_integer|att_readonly);
+
+#if defined (HISTORY)
+ INIT_DYNAMIC_VAR ("HISTCMD", (char *)NULL, get_histcmd, (sh_var_assign_func_t *)NULL);
+ VSETATTR (v, att_integer);
+#endif
+
+#if defined (READLINE)
+ INIT_DYNAMIC_VAR ("COMP_WORDBREAKS", (char *)NULL, get_comp_wordbreaks, assign_comp_wordbreaks);
+#endif
+
+#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
+ v = init_dynamic_array_var ("DIRSTACK", get_dirstack, assign_dirstack, 0);
+#endif /* PUSHD_AND_POPD && ARRAY_VARS */
+
+#if defined (ARRAY_VARS)
+ v = init_dynamic_array_var ("GROUPS", get_groupset, null_array_assign, att_noassign);
+
+# if defined (DEBUGGER)
+ v = init_dynamic_array_var ("BASH_ARGC", get_self, null_array_assign, att_noassign|att_nounset);
+ v = init_dynamic_array_var ("BASH_ARGV", get_self, null_array_assign, att_noassign|att_nounset);
+# endif /* DEBUGGER */
+ v = init_dynamic_array_var ("BASH_SOURCE", get_self, null_array_assign, att_noassign|att_nounset);
+ v = init_dynamic_array_var ("BASH_LINENO", get_self, null_array_assign, att_noassign|att_nounset);
+
+ v = init_dynamic_assoc_var ("BASH_CMDS", get_hashcmd, assign_hashcmd, att_nofree);
+# if defined (ALIAS)
+ v = init_dynamic_assoc_var ("BASH_ALIASES", get_aliasvar, assign_aliasvar, att_nofree);
+# endif
+#endif
+
+ v = init_funcname_var ();
+}
+
+/* **************************************************************** */
+/* */
+/* Retrieving variables and values */
+/* */
+/* **************************************************************** */
+
+/* How to get a pointer to the shell variable or function named NAME.
+ HASHED_VARS is a pointer to the hash table containing the list
+ of interest (either variables or functions). */
+
+static SHELL_VAR *
+hash_lookup (name, hashed_vars)
+ const char *name;
+ HASH_TABLE *hashed_vars;
+{
+ BUCKET_CONTENTS *bucket;
+
+ bucket = hash_search (name, hashed_vars, 0);
+ /* If we find the name in HASHED_VARS, set LAST_TABLE_SEARCHED to that
+ table. */
+ if (bucket)
+ last_table_searched = hashed_vars;
+ return (bucket ? (SHELL_VAR *)bucket->data : (SHELL_VAR *)NULL);
+}
+
+SHELL_VAR *
+var_lookup (name, vcontext)
+ const char *name;
+ VAR_CONTEXT *vcontext;
+{
+ VAR_CONTEXT *vc;
+ SHELL_VAR *v;
+
+ v = (SHELL_VAR *)NULL;
+ for (vc = vcontext; vc; vc = vc->down)
+ if (v = hash_lookup (name, vc->table))
+ break;
+
+ return v;
+}
+
+/* Look up the variable entry named NAME. If SEARCH_TEMPENV is non-zero,
+ then also search the temporarily built list of exported variables.
+ The lookup order is:
+ temporary_env
+ shell_variables list
+*/
+
+SHELL_VAR *
+find_variable_internal (name, force_tempenv)
+ const char *name;
+ int force_tempenv;
+{
+ SHELL_VAR *var;
+ int search_tempenv;
+ VAR_CONTEXT *vc;
+
+ var = (SHELL_VAR *)NULL;
+
+ /* If explicitly requested, first look in the temporary environment for
+ the variable. This allows constructs such as "foo=x eval 'echo $foo'"
+ to get the `exported' value of $foo. This happens if we are executing
+ a function or builtin, or if we are looking up a variable in a
+ "subshell environment". */
+ search_tempenv = force_tempenv || (expanding_redir == 0 && subshell_environment);
+
+ if (search_tempenv && temporary_env)
+ var = hash_lookup (name, temporary_env);
+
+ vc = shell_variables;
+#if 0
+if (search_tempenv == 0 && /* (subshell_environment & SUBSHELL_COMSUB) && */
+ expanding_redir &&
+ (this_shell_builtin == eval_builtin || this_shell_builtin == command_builtin))
+ {
+ itrace("find_variable_internal: search_tempenv == 0: skipping VC_BLTNENV");
+ while (vc && (vc->flags & VC_BLTNENV))
+ vc = vc->down;
+ if (vc == 0)
+ vc = shell_variables;
+ }
+#endif
+
+ if (var == 0)
+ var = var_lookup (name, vc);
+
+ if (var == 0)
+ return ((SHELL_VAR *)NULL);
+
+ return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
+}
+
+/* Look up and resolve the chain of nameref variables starting at V all the
+ way to NULL or non-nameref. */
+SHELL_VAR *
+find_variable_nameref (v)
+ SHELL_VAR *v;
+{
+ int level;
+ char *newname;
+ SHELL_VAR *orig, *oldv;
+
+ level = 0;
+ orig = v;
+ while (v && nameref_p (v))
+ {
+ level++;
+ if (level > NAMEREF_MAX)
+ return ((SHELL_VAR *)0); /* error message here? */
+ newname = nameref_cell (v);
+ if (newname == 0 || *newname == '\0')
+ return ((SHELL_VAR *)0);
+ oldv = v;
+ v = find_variable_internal (newname, (expanding_redir == 0 && (assigning_in_environment || executing_builtin)));
+ if (v == orig || v == oldv)
+ {
+ internal_warning (_("%s: circular name reference"), orig->name);
+ return ((SHELL_VAR *)0);
+ }
+ }
+ return v;
+}
+
+/* Resolve the chain of nameref variables for NAME. XXX - could change later */
+SHELL_VAR *
+find_variable_last_nameref (name)
+ const char *name;
+{
+ SHELL_VAR *v, *nv;
+ char *newname;
+ int level;
+
+ nv = v = find_variable_noref (name);
+ level = 0;
+ while (v && nameref_p (v))
+ {
+ level++;
+ if (level > NAMEREF_MAX)
+ return ((SHELL_VAR *)0); /* error message here? */
+ newname = nameref_cell (v);
+ if (newname == 0 || *newname == '\0')
+ return ((SHELL_VAR *)0);
+ nv = v;
+ v = find_variable_internal (newname, (expanding_redir == 0 && (assigning_in_environment || executing_builtin)));
+ }
+ return nv;
+}
+
+/* Resolve the chain of nameref variables for NAME. XXX - could change later */
+SHELL_VAR *
+find_global_variable_last_nameref (name)
+ const char *name;
+{
+ SHELL_VAR *v, *nv;
+ char *newname;
+ int level;
+
+ nv = v = find_global_variable_noref (name);
+ level = 0;
+ while (v && nameref_p (v))
+ {
+ level++;
+ if (level > NAMEREF_MAX)
+ return ((SHELL_VAR *)0); /* error message here? */
+ newname = nameref_cell (v);
+ if (newname == 0 || *newname == '\0')
+ return ((SHELL_VAR *)0);
+ nv = v;
+ v = find_global_variable_noref (newname);
+ }
+ return nv;
+}
+
+static SHELL_VAR *
+find_nameref_at_context (v, vc)
+ SHELL_VAR *v;
+ VAR_CONTEXT *vc;
+{
+ SHELL_VAR *nv, *nv2;
+ VAR_CONTEXT *nvc;
+ char *newname;
+ int level;
+
+ nv = v;
+ level = 1;
+ while (nv && nameref_p (nv))
+ {
+ level++;
+ if (level > NAMEREF_MAX)
+ return ((SHELL_VAR *)NULL);
+ newname = nameref_cell (nv);
+ if (newname == 0 || *newname == '\0')
+ return ((SHELL_VAR *)NULL);
+ nv2 = hash_lookup (newname, vc->table);
+ if (nv2 == 0)
+ break;
+ nv = nv2;
+ }
+ return nv;
+}
+
+/* Do nameref resolution from the VC, which is the local context for some
+ function or builtin, `up' the chain to the global variables context. If
+ NVCP is not NULL, return the variable context where we finally ended the
+ nameref resolution (so the bind_variable_internal can use the correct
+ variable context and hash table). */
+static SHELL_VAR *
+find_variable_nameref_context (v, vc, nvcp)
+ SHELL_VAR *v;
+ VAR_CONTEXT *vc;
+ VAR_CONTEXT **nvcp;
+{
+ SHELL_VAR *nv, *nv2;
+ VAR_CONTEXT *nvc;
+
+ /* Look starting at the current context all the way `up' */
+ for (nv = v, nvc = vc; nvc; nvc = nvc->down)
+ {
+ nv2 = find_nameref_at_context (nv, nvc);
+ if (nv2 == 0)
+ continue;
+ nv = nv2;
+ if (*nvcp)
+ *nvcp = nvc;
+ }
+ return (nameref_p (nv) ? (SHELL_VAR *)NULL : nv);
+}
+
+/* Do nameref resolution from the VC, which is the local context for some
+ function or builtin, `up' the chain to the global variables context. If
+ NVCP is not NULL, return the variable context where we finally ended the
+ nameref resolution (so the bind_variable_internal can use the correct
+ variable context and hash table). */
+static SHELL_VAR *
+find_variable_last_nameref_context (v, vc, nvcp)
+ SHELL_VAR *v;
+ VAR_CONTEXT *vc;
+ VAR_CONTEXT **nvcp;
+{
+ SHELL_VAR *nv, *nv2;
+ VAR_CONTEXT *nvc;
+
+ /* Look starting at the current context all the way `up' */
+ for (nv = v, nvc = vc; nvc; nvc = nvc->down)
+ {
+ nv2 = find_nameref_at_context (nv, nvc);
+ if (nv2 == 0)
+ continue;
+ nv = nv2;
+ if (*nvcp)
+ *nvcp = nvc;
+ }
+ return (nameref_p (nv) ? nv : (SHELL_VAR *)NULL);
+}
+
+/* Find a variable, forcing a search of the temporary environment first */
+SHELL_VAR *
+find_variable_tempenv (name)
+ const char *name;
+{
+ SHELL_VAR *var;
+
+ var = find_variable_internal (name, 1);
+ if (var && nameref_p (var))
+ var = find_variable_nameref (var);
+ return (var);
+}
+
+/* Find a variable, not forcing a search of the temporary environment first */
+SHELL_VAR *
+find_variable_notempenv (name)
+ const char *name;
+{
+ SHELL_VAR *var;
+
+ var = find_variable_internal (name, 0);
+ if (var && nameref_p (var))
+ var = find_variable_nameref (var);
+ return (var);
+}
+
+SHELL_VAR *
+find_global_variable (name)
+ const char *name;
+{
+ SHELL_VAR *var;
+
+ var = var_lookup (name, global_variables);
+ if (var && nameref_p (var))
+ var = find_variable_nameref (var);
+
+ if (var == 0)
+ return ((SHELL_VAR *)NULL);
+
+ return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
+}
+
+SHELL_VAR *
+find_global_variable_noref (name)
+ const char *name;
+{
+ SHELL_VAR *var;
+
+ var = var_lookup (name, global_variables);
+
+ if (var == 0)
+ return ((SHELL_VAR *)NULL);
+
+ return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
+}
+
+SHELL_VAR *
+find_shell_variable (name)
+ const char *name;
+{
+ SHELL_VAR *var;
+
+ var = var_lookup (name, shell_variables);
+ if (var && nameref_p (var))
+ var = find_variable_nameref (var);
+
+ if (var == 0)
+ return ((SHELL_VAR *)NULL);
+
+ return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
+}
+
+/* Look up the variable entry named NAME. Returns the entry or NULL. */
+SHELL_VAR *
+find_variable (name)
+ const char *name;
+{
+ SHELL_VAR *v;
+
+ last_table_searched = 0;
+ v = find_variable_internal (name, (expanding_redir == 0 && (assigning_in_environment || executing_builtin)));
+ if (v && nameref_p (v))
+ v = find_variable_nameref (v);
+ return v;
+}
+
+SHELL_VAR *
+find_variable_noref (name)
+ const char *name;
+{
+ SHELL_VAR *v;
+
+ v = find_variable_internal (name, (expanding_redir == 0 && (assigning_in_environment || executing_builtin)));
+ return v;
+}
+
+/* Look up the function entry whose name matches STRING.
+ Returns the entry or NULL. */
+SHELL_VAR *
+find_function (name)
+ const char *name;
+{
+ return (hash_lookup (name, shell_functions));
+}
+
+/* Find the function definition for the shell function named NAME. Returns
+ the entry or NULL. */
+FUNCTION_DEF *
+find_function_def (name)
+ const char *name;
+{
+#if defined (DEBUGGER)
+ return ((FUNCTION_DEF *)hash_lookup (name, shell_function_defs));
+#else
+ return ((FUNCTION_DEF *)0);
+#endif
+}
+
+/* Return the value of VAR. VAR is assumed to have been the result of a
+ lookup without any subscript, if arrays are compiled into the shell. */
+char *
+get_variable_value (var)
+ SHELL_VAR *var;
+{
+ if (var == 0)
+ return ((char *)NULL);
+#if defined (ARRAY_VARS)
+ else if (array_p (var))
+ return (array_reference (array_cell (var), 0));
+ else if (assoc_p (var))
+ return (assoc_reference (assoc_cell (var), "0"));
+#endif
+ else
+ return (value_cell (var));
+}
+
+/* Return the string value of a variable. Return NULL if the variable
+ doesn't exist. Don't cons a new string. This is a potential memory
+ leak if the variable is found in the temporary environment. Since
+ functions and variables have separate name spaces, returns NULL if
+ var_name is a shell function only. */
+char *
+get_string_value (var_name)
+ const char *var_name;
+{
+ SHELL_VAR *var;
+
+ var = find_variable (var_name);
+ return ((var) ? get_variable_value (var) : (char *)NULL);
+}
+
+/* This is present for use by the tilde and readline libraries. */
+char *
+sh_get_env_value (v)
+ const char *v;
+{
+ return get_string_value (v);
+}
+
+/* **************************************************************** */
+/* */
+/* Creating and setting variables */
+/* */
+/* **************************************************************** */
+
+/* Set NAME to VALUE if NAME has no value. */
+SHELL_VAR *
+set_if_not (name, value)
+ char *name, *value;
+{
+ SHELL_VAR *v;
+
+ if (shell_variables == 0)
+ create_variable_tables ();
+
+ v = find_variable (name);
+ if (v == 0)
+ v = bind_variable_internal (name, value, global_variables->table, HASH_NOSRCH, 0);
+ return (v);
+}
+
+/* Create a local variable referenced by NAME. */
+SHELL_VAR *
+make_local_variable (name)
+ const char *name;
+{
+ SHELL_VAR *new_var, *old_var;
+ VAR_CONTEXT *vc;
+ int was_tmpvar;
+ char *tmp_value;
+
+ /* local foo; local foo; is a no-op. */
+ old_var = find_variable (name);
+ if (old_var && local_p (old_var) && old_var->context == variable_context)
+ {
+ VUNSETATTR (old_var, att_invisible); /* XXX */
+ return (old_var);
+ }
+
+ was_tmpvar = old_var && tempvar_p (old_var);
+ /* If we're making a local variable in a shell function, the temporary env
+ has already been merged into the function's variable context stack. We
+ can assume that a temporary var in the same context appears in the same
+ VAR_CONTEXT and can safely be returned without creating a new variable
+ (which results in duplicate names in the same VAR_CONTEXT->table */
+ /* We can't just test tmpvar_p because variables in the temporary env given
+ to a shell function appear in the function's local variable VAR_CONTEXT
+ but retain their tempvar attribute. We want temporary variables that are
+ found in temporary_env, hence the test for last_table_searched, which is
+ set in hash_lookup and only (so far) checked here. */
+ if (was_tmpvar && old_var->context == variable_context && last_table_searched != temporary_env)
+ {
+ VUNSETATTR (old_var, att_invisible);
+ return (old_var);
+ }
+ if (was_tmpvar)
+ tmp_value = value_cell (old_var);
+
+ for (vc = shell_variables; vc; vc = vc->down)
+ if (vc_isfuncenv (vc) && vc->scope == variable_context)
+ break;
+
+ if (vc == 0)
+ {
+ internal_error (_("make_local_variable: no function context at current scope"));
+ return ((SHELL_VAR *)NULL);
+ }
+ else if (vc->table == 0)
+ vc->table = hash_create (TEMPENV_HASH_BUCKETS);
+
+ /* Since this is called only from the local/declare/typeset code, we can
+ call builtin_error here without worry (of course, it will also work
+ for anything that sets this_command_name). Variables with the `noassign'
+ attribute may not be made local. The test against old_var's context
+ level is to disallow local copies of readonly global variables (since I
+ believe that this could be a security hole). Readonly copies of calling
+ function local variables are OK. */
+ if (old_var && (noassign_p (old_var) ||
+ (readonly_p (old_var) && old_var->context == 0)))
+ {
+ if (readonly_p (old_var))
+ sh_readonly (name);
+ else if (noassign_p (old_var))
+ builtin_error (_("%s: variable may not be assigned value"), name);
+#if 0
+ /* Let noassign variables through with a warning */
+ if (readonly_p (old_var))
+#endif
+ return ((SHELL_VAR *)NULL);
+ }
+
+ if (old_var == 0)
+ new_var = make_new_variable (name, vc->table);
+ else
+ {
+ new_var = make_new_variable (name, vc->table);
+
+ /* If we found this variable in one of the temporary environments,
+ inherit its value. Watch to see if this causes problems with
+ things like `x=4 local x'. XXX - see above for temporary env
+ variables with the same context level as variable_context */
+ /* XXX - we should only do this if the variable is not an array. */
+ if (was_tmpvar)
+ var_setvalue (new_var, savestring (tmp_value));
+
+ new_var->attributes = exported_p (old_var) ? att_exported : 0;
+ }
+
+ vc->flags |= VC_HASLOCAL;
+
+ new_var->context = variable_context;
+ VSETATTR (new_var, att_local);
+
+ if (ifsname (name))
+ setifs (new_var);
+
+ VSETATTR (new_var, att_invisible); /* XXX */
+ return (new_var);
+}
+
+/* Create a new shell variable with name NAME. */
+static SHELL_VAR *
+new_shell_variable (name)
+ const char *name;
+{
+ SHELL_VAR *entry;
+
+ entry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
+
+ entry->name = savestring (name);
+ var_setvalue (entry, (char *)NULL);
+ CLEAR_EXPORTSTR (entry);
+
+ entry->dynamic_value = (sh_var_value_func_t *)NULL;
+ entry->assign_func = (sh_var_assign_func_t *)NULL;
+
+ entry->attributes = 0;
+
+ /* Always assume variables are to be made at toplevel!
+ make_local_variable has the responsibility of changing the
+ variable context. */
+ entry->context = 0;
+
+ return (entry);
+}
+
+/* Create a new shell variable with name NAME and add it to the hash table
+ TABLE. */
+static SHELL_VAR *
+make_new_variable (name, table)
+ const char *name;
+ HASH_TABLE *table;
+{
+ SHELL_VAR *entry;
+ BUCKET_CONTENTS *elt;
+
+ entry = new_shell_variable (name);
+
+ /* Make sure we have a shell_variables hash table to add to. */
+ if (shell_variables == 0)
+ create_variable_tables ();
+
+ elt = hash_insert (savestring (name), table, HASH_NOSRCH);
+ elt->data = (PTR_T)entry;
+
+ return entry;
+}
+
+#if defined (ARRAY_VARS)
+SHELL_VAR *
+make_new_array_variable (name)
+ char *name;
+{
+ SHELL_VAR *entry;
+ ARRAY *array;
+
+ entry = make_new_variable (name, global_variables->table);
+ array = array_create ();
+
+ var_setarray (entry, array);
+ VSETATTR (entry, att_array);
+ return entry;
+}
+
+SHELL_VAR *
+make_local_array_variable (name, assoc_ok)
+ char *name;
+ int assoc_ok;
+{
+ SHELL_VAR *var;
+ ARRAY *array;
+
+ var = make_local_variable (name);
+ if (var == 0 || array_p (var) || (assoc_ok && assoc_p (var)))
+ return var;
+
+ array = array_create ();
+
+ dispose_variable_value (var);
+ var_setarray (var, array);
+ VSETATTR (var, att_array);
+ return var;
+}
+
+SHELL_VAR *
+make_new_assoc_variable (name)
+ char *name;
+{
+ SHELL_VAR *entry;
+ HASH_TABLE *hash;
+
+ entry = make_new_variable (name, global_variables->table);
+ hash = assoc_create (0);
+
+ var_setassoc (entry, hash);
+ VSETATTR (entry, att_assoc);
+ return entry;
+}
+
+SHELL_VAR *
+make_local_assoc_variable (name)
+ char *name;
+{
+ SHELL_VAR *var;
+ HASH_TABLE *hash;
+
+ var = make_local_variable (name);
+ if (var == 0 || assoc_p (var))
+ return var;
+
+ dispose_variable_value (var);
+ hash = assoc_create (0);
+
+ var_setassoc (var, hash);
+ VSETATTR (var, att_assoc);
+ return var;
+}
+#endif
+
+char *
+make_variable_value (var, value, flags)
+ SHELL_VAR *var;
+ char *value;
+ int flags;
+{
+ char *retval, *oval;
+ intmax_t lval, rval;
+ int expok, olen, op;
+
+ /* If this variable has had its type set to integer (via `declare -i'),
+ then do expression evaluation on it and store the result. The
+ functions in expr.c (evalexp()) and bind_int_variable() are responsible
+ for turning off the integer flag if they don't want further
+ evaluation done. */
+ if (integer_p (var))
+ {
+ if (flags & ASS_APPEND)
+ {
+ oval = value_cell (var);
+ lval = evalexp (oval, &expok); /* ksh93 seems to do this */
+ if (expok == 0)
+ {
+ top_level_cleanup ();
+ jump_to_top_level (DISCARD);
+ }
+ }
+ rval = evalexp (value, &expok);
+ if (expok == 0)
+ {
+ top_level_cleanup ();
+ jump_to_top_level (DISCARD);
+ }
+ /* This can be fooled if the variable's value changes while evaluating
+ `rval'. We can change it if we move the evaluation of lval to here. */
+ if (flags & ASS_APPEND)
+ rval += lval;
+ retval = itos (rval);
+ }
+#if defined (CASEMOD_ATTRS)
+ else if (capcase_p (var) || uppercase_p (var) || lowercase_p (var))
+ {
+ if (flags & ASS_APPEND)
+ {
+ oval = get_variable_value (var);
+ if (oval == 0) /* paranoia */
+ oval = "";
+ olen = STRLEN (oval);
+ retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1);
+ strcpy (retval, oval);
+ if (value)
+ strcpy (retval+olen, value);
+ }
+ else if (*value)
+ retval = savestring (value);
+ else
+ {
+ retval = (char *)xmalloc (1);
+ retval[0] = '\0';
+ }
+ op = capcase_p (var) ? CASE_CAPITALIZE
+ : (uppercase_p (var) ? CASE_UPPER : CASE_LOWER);
+ oval = sh_modcase (retval, (char *)0, op);
+ free (retval);
+ retval = oval;
+ }
+#endif /* CASEMOD_ATTRS */
+ else if (value)
+ {
+ if (flags & ASS_APPEND)
+ {
+ oval = get_variable_value (var);
+ if (oval == 0) /* paranoia */
+ oval = "";
+ olen = STRLEN (oval);
+ retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1);
+ strcpy (retval, oval);
+ if (value)
+ strcpy (retval+olen, value);
+ }
+ else if (*value)
+ retval = savestring (value);
+ else
+ {
+ retval = (char *)xmalloc (1);
+ retval[0] = '\0';
+ }
+ }
+ else
+ retval = (char *)NULL;
+
+ return retval;
+}
+
+/* Bind a variable NAME to VALUE in the HASH_TABLE TABLE, which may be the
+ temporary environment (but usually is not). */
+static SHELL_VAR *
+bind_variable_internal (name, value, table, hflags, aflags)
+ const char *name;
+ char *value;
+ HASH_TABLE *table;
+ int hflags, aflags;
+{
+ char *newval;
+ SHELL_VAR *entry;
+
+ entry = (hflags & HASH_NOSRCH) ? (SHELL_VAR *)NULL : hash_lookup (name, table);
+ /* Follow the nameref chain here if this is the global variables table */
+ if (entry && nameref_p (entry) && (invisible_p (entry) == 0) && table == global_variables->table)
+ {
+ entry = find_global_variable (entry->name);
+ /* Let's see if we have a nameref referencing a variable that hasn't yet
+ been created. */
+ if (entry == 0)
+ entry = find_variable_last_nameref (name); /* XXX */
+ if (entry == 0) /* just in case */
+ return (entry);
+ }
+
+ /* The first clause handles `declare -n ref; ref=x;' */
+ if (entry && invisible_p (entry) && nameref_p (entry))
+ goto assign_value;
+ else if (entry && nameref_p (entry))
+ {
+ newval = nameref_cell (entry);
+#if defined (ARRAY_VARS)
+ /* declare -n foo=x[2] */
+ if (valid_array_reference (newval))
+ /* XXX - should it be aflags? */
+ entry = assign_array_element (newval, make_variable_value (entry, value, 0), aflags);
+ else
+#endif
+ {
+ entry = make_new_variable (newval, table);
+ var_setvalue (entry, make_variable_value (entry, value, 0));
+ }
+ }
+ else if (entry == 0)
+ {
+ entry = make_new_variable (name, table);
+ var_setvalue (entry, make_variable_value (entry, value, 0)); /* XXX */
+ }
+ else if (entry->assign_func) /* array vars have assign functions now */
+ {
+ INVALIDATE_EXPORTSTR (entry);
+ newval = (aflags & ASS_APPEND) ? make_variable_value (entry, value, aflags) : value;
+ if (assoc_p (entry))
+ entry = (*(entry->assign_func)) (entry, newval, -1, savestring ("0"));
+ else if (array_p (entry))
+ entry = (*(entry->assign_func)) (entry, newval, 0, 0);
+ else
+ entry = (*(entry->assign_func)) (entry, newval, -1, 0);
+ if (newval != value)
+ free (newval);
+ return (entry);
+ }
+ else
+ {
+assign_value:
+ if (readonly_p (entry) || noassign_p (entry))
+ {
+ if (readonly_p (entry))
+ err_readonly (name);
+ return (entry);
+ }
+
+ /* Variables which are bound are visible. */
+ VUNSETATTR (entry, att_invisible);
+
+#if defined (ARRAY_VARS)
+ if (assoc_p (entry) || array_p (entry))
+ newval = make_array_variable_value (entry, 0, "0", value, aflags);
+ else
+#endif
+
+ newval = make_variable_value (entry, value, aflags); /* XXX */
+
+ /* Invalidate any cached export string */
+ INVALIDATE_EXPORTSTR (entry);
+
+#if defined (ARRAY_VARS)
+ /* XXX -- this bears looking at again -- XXX */
+ /* If an existing array variable x is being assigned to with x=b or
+ `read x' or something of that nature, silently convert it to
+ x[0]=b or `read x[0]'. */
+ if (assoc_p (entry))
+ {
+ assoc_insert (assoc_cell (entry), savestring ("0"), newval);
+ free (newval);
+ }
+ else if (array_p (entry))
+ {
+ array_insert (array_cell (entry), 0, newval);
+ free (newval);
+ }
+ else
+#endif
+ {
+ FREE (value_cell (entry));
+ var_setvalue (entry, newval);
+ }
+ }
+
+ if (mark_modified_vars)
+ VSETATTR (entry, att_exported);
+
+ if (exported_p (entry))
+ array_needs_making = 1;
+
+ return (entry);
+}
+
+/* Bind a variable NAME to VALUE. This conses up the name
+ and value strings. If we have a temporary environment, we bind there
+ first, then we bind into shell_variables. */
+
+SHELL_VAR *
+bind_variable (name, value, flags)
+ const char *name;
+ char *value;
+ int flags;
+{
+ SHELL_VAR *v, *nv;
+ VAR_CONTEXT *vc, *nvc;
+ int level;
+
+ if (shell_variables == 0)
+ create_variable_tables ();
+
+ /* If we have a temporary environment, look there first for the variable,
+ and, if found, modify the value there before modifying it in the
+ shell_variables table. This allows sourced scripts to modify values
+ given to them in a temporary environment while modifying the variable
+ value that the caller sees. */
+ if (temporary_env)
+ bind_tempenv_variable (name, value);
+
+ /* XXX -- handle local variables here. */
+ for (vc = shell_variables; vc; vc = vc->down)
+ {
+ if (vc_isfuncenv (vc) || vc_isbltnenv (vc))
+ {
+ v = hash_lookup (name, vc->table);
+ nvc = vc;
+ if (v && nameref_p (v))
+ {
+ nv = find_variable_nameref_context (v, vc, &nvc);
+ if (nv == 0)
+ {
+ nv = find_variable_last_nameref_context (v, vc, &nvc);
+ if (nv && nameref_p (nv))
+ {
+ /* If this nameref variable doesn't have a value yet,
+ set the value. Otherwise, assign using the value as
+ normal. */
+ if (nameref_cell (nv) == 0)
+ return (bind_variable_internal (nv->name, value, nvc->table, 0, flags));
+ return (bind_variable_internal (nameref_cell (nv), value, nvc->table, 0, flags));
+ }
+ else
+ v = nv;
+ }
+ else
+ v = nv;
+ }
+ if (v)
+ return (bind_variable_internal (v->name, value, nvc->table, 0, flags));
+ }
+ }
+ /* bind_variable_internal will handle nameref resolution in this case */
+ return (bind_variable_internal (name, value, global_variables->table, 0, flags));
+}
+
+SHELL_VAR *
+bind_global_variable (name, value, flags)
+ const char *name;
+ char *value;
+ int flags;
+{
+ SHELL_VAR *v, *nv;
+ VAR_CONTEXT *vc, *nvc;
+ int level;
+
+ if (shell_variables == 0)
+ create_variable_tables ();
+
+ /* bind_variable_internal will handle nameref resolution in this case */
+ return (bind_variable_internal (name, value, global_variables->table, 0, flags));
+}
+
+/* Make VAR, a simple shell variable, have value VALUE. Once assigned a
+ value, variables are no longer invisible. This is a duplicate of part
+ of the internals of bind_variable. If the variable is exported, or
+ all modified variables should be exported, mark the variable for export
+ and note that the export environment needs to be recreated. */
+SHELL_VAR *
+bind_variable_value (var, value, aflags)
+ SHELL_VAR *var;
+ char *value;
+ int aflags;
+{
+ char *t;
+
+ VUNSETATTR (var, att_invisible);
+
+ if (var->assign_func)
+ {
+ /* If we're appending, we need the old value, so use
+ make_variable_value */
+ t = (aflags & ASS_APPEND) ? make_variable_value (var, value, aflags) : value;
+ (*(var->assign_func)) (var, t, -1, 0);
+ if (t != value && t)
+ free (t);
+ }
+ else
+ {
+ t = make_variable_value (var, value, aflags);
+ FREE (value_cell (var));
+ var_setvalue (var, t);
+ }
+
+ INVALIDATE_EXPORTSTR (var);
+
+ if (mark_modified_vars)
+ VSETATTR (var, att_exported);
+
+ if (exported_p (var))
+ array_needs_making = 1;
+
+ return (var);
+}
+
+/* Bind/create a shell variable with the name LHS to the RHS.
+ This creates or modifies a variable such that it is an integer.
+
+ This used to be in expr.c, but it is here so that all of the
+ variable binding stuff is localized. Since we don't want any
+ recursive evaluation from bind_variable() (possible without this code,
+ since bind_variable() calls the evaluator for variables with the integer
+ attribute set), we temporarily turn off the integer attribute for each
+ variable we set here, then turn it back on after binding as necessary. */
+
+SHELL_VAR *
+bind_int_variable (lhs, rhs)
+ char *lhs, *rhs;
+{
+ register SHELL_VAR *v;
+ int isint, isarr, implicitarray;
+
+ isint = isarr = implicitarray = 0;
+#if defined (ARRAY_VARS)
+ if (valid_array_reference (lhs))
+ {
+ isarr = 1;
+ v = array_variable_part (lhs, (char **)0, (int *)0);
+ }
+ else
+#endif
+ v = find_variable (lhs);
+
+ if (v)
+ {
+ isint = integer_p (v);
+ VUNSETATTR (v, att_integer);
+#if defined (ARRAY_VARS)
+ if (array_p (v) && isarr == 0)
+ implicitarray = 1;
+#endif
+ }
+
+#if defined (ARRAY_VARS)
+ if (isarr)
+ v = assign_array_element (lhs, rhs, 0);
+ else if (implicitarray)
+ v = bind_array_variable (lhs, 0, rhs, 0);
+ else
+#endif
+ v = bind_variable (lhs, rhs, 0);
+
+ if (v && isint)
+ VSETATTR (v, att_integer);
+
+ VUNSETATTR (v, att_invisible);
+
+ return (v);
+}
+
+SHELL_VAR *
+bind_var_to_int (var, val)
+ char *var;
+ intmax_t val;
+{
+ char ibuf[INT_STRLEN_BOUND (intmax_t) + 1], *p;
+
+ p = fmtulong (val, 10, ibuf, sizeof (ibuf), 0);
+ return (bind_int_variable (var, p));
+}
+
+/* Do a function binding to a variable. You pass the name and
+ the command to bind to. This conses the name and command. */
+SHELL_VAR *
+bind_function (name, value)
+ const char *name;
+ COMMAND *value;
+{
+ SHELL_VAR *entry;
+
+ entry = find_function (name);
+ if (entry == 0)
+ {
+ BUCKET_CONTENTS *elt;
+
+ elt = hash_insert (savestring (name), shell_functions, HASH_NOSRCH);
+ entry = new_shell_variable (name);
+ elt->data = (PTR_T)entry;
+ }
+ else
+ INVALIDATE_EXPORTSTR (entry);
+
+ if (var_isset (entry))
+ dispose_command (function_cell (entry));
+
+ if (value)
+ var_setfunc (entry, copy_command (value));
+ else
+ var_setfunc (entry, 0);
+
+ VSETATTR (entry, att_function);
+
+ if (mark_modified_vars)
+ VSETATTR (entry, att_exported);
+
+ VUNSETATTR (entry, att_invisible); /* Just to be sure */
+
+ if (exported_p (entry))
+ array_needs_making = 1;
+
+#if defined (PROGRAMMABLE_COMPLETION)
+ set_itemlist_dirty (&it_functions);
+#endif
+
+ return (entry);
+}
+
+#if defined (DEBUGGER)
+/* Bind a function definition, which includes source file and line number
+ information in addition to the command, into the FUNCTION_DEF hash table.*/
+void
+bind_function_def (name, value)
+ const char *name;
+ FUNCTION_DEF *value;
+{
+ FUNCTION_DEF *entry;
+ BUCKET_CONTENTS *elt;
+ COMMAND *cmd;
+
+ entry = find_function_def (name);
+ if (entry)
+ {
+ dispose_function_def_contents (entry);
+ entry = copy_function_def_contents (value, entry);
+ }
+ else
+ {
+ cmd = value->command;
+ value->command = 0;
+ entry = copy_function_def (value);
+ value->command = cmd;
+
+ elt = hash_insert (savestring (name), shell_function_defs, HASH_NOSRCH);
+ elt->data = (PTR_T *)entry;
+ }
+}
+#endif /* DEBUGGER */
+
+/* Add STRING, which is of the form foo=bar, to the temporary environment
+ HASH_TABLE (temporary_env). The functions in execute_cmd.c are
+ responsible for moving the main temporary env to one of the other
+ temporary environments. The expansion code in subst.c calls this. */
+int
+assign_in_env (word, flags)
+ WORD_DESC *word;
+ int flags;
+{
+ int offset, aflags;
+ char *name, *temp, *value;
+ SHELL_VAR *var;
+ const char *string;
+
+ string = word->word;
+
+ aflags = 0;
+ offset = assignment (string, 0);
+ name = savestring (string);
+ value = (char *)NULL;
+
+ if (name[offset] == '=')
+ {
+ name[offset] = 0;
+
+ /* don't ignore the `+' when assigning temporary environment */
+ if (name[offset - 1] == '+')
+ {
+ name[offset - 1] = '\0';
+ aflags |= ASS_APPEND;
+ }
+
+ var = find_variable (name);
+ if (var && (readonly_p (var) || noassign_p (var)))
+ {
+ if (readonly_p (var))
+ err_readonly (name);
+ free (name);
+ return (0);
+ }
+
+ temp = name + offset + 1;
+ value = expand_assignment_string_to_string (temp, 0);
+
+ if (var && (aflags & ASS_APPEND))
+ {
+ temp = make_variable_value (var, value, aflags);
+ FREE (value);
+ value = temp;
+ }
+ }
+
+ if (temporary_env == 0)
+ temporary_env = hash_create (TEMPENV_HASH_BUCKETS);
+
+ var = hash_lookup (name, temporary_env);
+ if (var == 0)
+ var = make_new_variable (name, temporary_env);
+ else
+ FREE (value_cell (var));
+
+ if (value == 0)
+ {
+ value = (char *)xmalloc (1); /* like do_assignment_internal */
+ value[0] = '\0';
+ }
+
+ var_setvalue (var, value);
+ var->attributes |= (att_exported|att_tempvar);
+ var->context = variable_context; /* XXX */
+
+ INVALIDATE_EXPORTSTR (var);
+ var->exportstr = mk_env_string (name, value);
+
+ array_needs_making = 1;
+
+ if (flags)
+ stupidly_hack_special_variables (name);
+
+ if (echo_command_at_execute)
+ /* The Korn shell prints the `+ ' in front of assignment statements,
+ so we do too. */
+ xtrace_print_assignment (name, value, 0, 1);
+
+ free (name);
+ return 1;
+}
+
+/* **************************************************************** */
+/* */
+/* Copying variables */
+/* */
+/* **************************************************************** */
+
+#ifdef INCLUDE_UNUSED
+/* Copy VAR to a new data structure and return that structure. */
+SHELL_VAR *
+copy_variable (var)
+ SHELL_VAR *var;
+{
+ SHELL_VAR *copy = (SHELL_VAR *)NULL;
+
+ if (var)
+ {
+ copy = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
+
+ copy->attributes = var->attributes;
+ copy->name = savestring (var->name);
+
+ if (function_p (var))
+ var_setfunc (copy, copy_command (function_cell (var)));
+#if defined (ARRAY_VARS)
+ else if (array_p (var))
+ var_setarray (copy, array_copy (array_cell (var)));
+ else if (assoc_p (var))
+ var_setassoc (copy, assoc_copy (assoc_cell (var)));
+#endif
+ else if (nameref_cell (var)) /* XXX - nameref */
+ var_setref (copy, savestring (nameref_cell (var)));
+ else if (value_cell (var)) /* XXX - nameref */
+ var_setvalue (copy, savestring (value_cell (var)));
+ else
+ var_setvalue (copy, (char *)NULL);
+
+ copy->dynamic_value = var->dynamic_value;
+ copy->assign_func = var->assign_func;
+
+ copy->exportstr = COPY_EXPORTSTR (var);
+
+ copy->context = var->context;
+ }
+ return (copy);
+}
+#endif
+
+/* **************************************************************** */
+/* */
+/* Deleting and unsetting variables */
+/* */
+/* **************************************************************** */
+
+/* Dispose of the information attached to VAR. */
+static void
+dispose_variable_value (var)
+ SHELL_VAR *var;
+{
+ if (function_p (var))
+ dispose_command (function_cell (var));
+#if defined (ARRAY_VARS)
+ else if (array_p (var))
+ array_dispose (array_cell (var));
+ else if (assoc_p (var))
+ assoc_dispose (assoc_cell (var));
+#endif
+ else if (nameref_p (var))
+ FREE (nameref_cell (var));
+ else
+ FREE (value_cell (var));
+}
+
+void
+dispose_variable (var)
+ SHELL_VAR *var;
+{
+ if (var == 0)
+ return;
+
+ if (nofree_p (var) == 0)
+ dispose_variable_value (var);
+
+ FREE_EXPORTSTR (var);
+
+ free (var->name);
+
+ if (exported_p (var))
+ array_needs_making = 1;
+
+ free (var);
+}
+
+/* Unset the shell variable referenced by NAME. Unsetting a nameref variable
+ unsets the variable it resolves to but leaves the nameref alone. */
+int
+unbind_variable (name)
+ const char *name;
+{
+ SHELL_VAR *v, *nv;
+ int r;
+
+ v = var_lookup (name, shell_variables);
+ nv = (v && nameref_p (v)) ? find_variable_nameref (v) : (SHELL_VAR *)NULL;
+
+ r = nv ? makunbound (nv->name, shell_variables) : makunbound (name, shell_variables);
+ return r;
+}
+
+/* Unbind NAME, where NAME is assumed to be a nameref variable */
+int
+unbind_nameref (name)
+ const char *name;
+{
+ SHELL_VAR *v;
+
+ v = var_lookup (name, shell_variables);
+ if (v && nameref_p (v))
+ return makunbound (name, shell_variables);
+ return 0;
+}
+
+/* Unset the shell function named NAME. */
+int
+unbind_func (name)
+ const char *name;
+{
+ BUCKET_CONTENTS *elt;
+ SHELL_VAR *func;
+
+ elt = hash_remove (name, shell_functions, 0);
+
+ if (elt == 0)
+ return -1;
+
+#if defined (PROGRAMMABLE_COMPLETION)
+ set_itemlist_dirty (&it_functions);
+#endif
+
+ func = (SHELL_VAR *)elt->data;
+ if (func)
+ {
+ if (exported_p (func))
+ array_needs_making++;
+ dispose_variable (func);
+ }
+
+ free (elt->key);
+ free (elt);
+
+ return 0;
+}
+
+#if defined (DEBUGGER)
+int
+unbind_function_def (name)
+ const char *name;
+{
+ BUCKET_CONTENTS *elt;
+ FUNCTION_DEF *funcdef;
+
+ elt = hash_remove (name, shell_function_defs, 0);
+
+ if (elt == 0)
+ return -1;
+
+ funcdef = (FUNCTION_DEF *)elt->data;
+ if (funcdef)
+ dispose_function_def (funcdef);
+
+ free (elt->key);
+ free (elt);
+
+ return 0;
+}
+#endif /* DEBUGGER */
+
+/* Make the variable associated with NAME go away. HASH_LIST is the
+ hash table from which this variable should be deleted (either
+ shell_variables or shell_functions).
+ Returns non-zero if the variable couldn't be found. */
+int
+makunbound (name, vc)
+ const char *name;
+ VAR_CONTEXT *vc;
+{
+ BUCKET_CONTENTS *elt, *new_elt;
+ SHELL_VAR *old_var;
+ VAR_CONTEXT *v;
+ char *t;
+
+ for (elt = (BUCKET_CONTENTS *)NULL, v = vc; v; v = v->down)
+ if (elt = hash_remove (name, v->table, 0))
+ break;
+
+ if (elt == 0)
+ return (-1);
+
+ old_var = (SHELL_VAR *)elt->data;
+
+ if (old_var && exported_p (old_var))
+ array_needs_making++;
+
+ /* If we're unsetting a local variable and we're still executing inside
+ the function, just mark the variable as invisible. The function
+ eventually called by pop_var_context() will clean it up later. This
+ must be done so that if the variable is subsequently assigned a new
+ value inside the function, the `local' attribute is still present.
+ We also need to add it back into the correct hash table. */
+ if (old_var && local_p (old_var) && variable_context == old_var->context)
+ {
+ if (nofree_p (old_var))
+ var_setvalue (old_var, (char *)NULL);
+#if defined (ARRAY_VARS)
+ else if (array_p (old_var))
+ array_dispose (array_cell (old_var));
+ else if (assoc_p (old_var))
+ assoc_dispose (assoc_cell (old_var));
+#endif
+ else if (nameref_p (old_var))
+ FREE (nameref_cell (old_var));
+ else
+ FREE (value_cell (old_var));
+ /* Reset the attributes. Preserve the export attribute if the variable
+ came from a temporary environment. Make sure it stays local, and
+ make it invisible. */
+ old_var->attributes = (exported_p (old_var) && tempvar_p (old_var)) ? att_exported : 0;
+ VSETATTR (old_var, att_local);
+ VSETATTR (old_var, att_invisible);
+ var_setvalue (old_var, (char *)NULL);
+ INVALIDATE_EXPORTSTR (old_var);
+
+ new_elt = hash_insert (savestring (old_var->name), v->table, 0);
+ new_elt->data = (PTR_T)old_var;
+ stupidly_hack_special_variables (old_var->name);
+
+ free (elt->key);
+ free (elt);
+ return (0);
+ }
+
+ /* Have to save a copy of name here, because it might refer to
+ old_var->name. If so, stupidly_hack_special_variables will
+ reference freed memory. */
+ t = savestring (name);
+
+ free (elt->key);
+ free (elt);
+
+ dispose_variable (old_var);
+ stupidly_hack_special_variables (t);
+ free (t);
+
+ return (0);
+}
+
+/* Get rid of all of the variables in the current context. */
+void
+kill_all_local_variables ()
+{
+ VAR_CONTEXT *vc;
+
+ for (vc = shell_variables; vc; vc = vc->down)
+ if (vc_isfuncenv (vc) && vc->scope == variable_context)
+ break;
+ if (vc == 0)
+ return; /* XXX */
+
+ if (vc->table && vc_haslocals (vc))
+ {
+ delete_all_variables (vc->table);
+ hash_dispose (vc->table);
+ }
+ vc->table = (HASH_TABLE *)NULL;
+}
+
+static void
+free_variable_hash_data (data)
+ PTR_T data;
+{
+ SHELL_VAR *var;
+
+ var = (SHELL_VAR *)data;
+ dispose_variable (var);
+}
+
+/* Delete the entire contents of the hash table. */
+void
+delete_all_variables (hashed_vars)
+ HASH_TABLE *hashed_vars;
+{
+ hash_flush (hashed_vars, free_variable_hash_data);
+}
+
+/* **************************************************************** */
+/* */
+/* Setting variable attributes */
+/* */
+/* **************************************************************** */
+
+#define FIND_OR_MAKE_VARIABLE(name, entry) \
+ do \
+ { \
+ entry = find_variable (name); \
+ if (!entry) \
+ { \
+ entry = bind_variable (name, "", 0); \
+ if (!no_invisible_vars && entry) entry->attributes |= att_invisible; \
+ } \
+ } \
+ while (0)
+
+/* Make the variable associated with NAME be readonly.
+ If NAME does not exist yet, create it. */
+void
+set_var_read_only (name)
+ char *name;
+{
+ SHELL_VAR *entry;
+
+ FIND_OR_MAKE_VARIABLE (name, entry);
+ VSETATTR (entry, att_readonly);
+}
+
+#ifdef INCLUDE_UNUSED
+/* Make the function associated with NAME be readonly.
+ If NAME does not exist, we just punt, like auto_export code below. */
+void
+set_func_read_only (name)
+ const char *name;
+{
+ SHELL_VAR *entry;
+
+ entry = find_function (name);
+ if (entry)
+ VSETATTR (entry, att_readonly);
+}
+
+/* Make the variable associated with NAME be auto-exported.
+ If NAME does not exist yet, create it. */
+void
+set_var_auto_export (name)
+ char *name;
+{
+ SHELL_VAR *entry;
+
+ FIND_OR_MAKE_VARIABLE (name, entry);
+ set_auto_export (entry);
+}
+
+/* Make the function associated with NAME be auto-exported. */
+void
+set_func_auto_export (name)
+ const char *name;
+{
+ SHELL_VAR *entry;
+
+ entry = find_function (name);
+ if (entry)
+ set_auto_export (entry);
+}
+#endif
+
+/* **************************************************************** */
+/* */
+/* Creating lists of variables */
+/* */
+/* **************************************************************** */
+
+static VARLIST *
+vlist_alloc (nentries)
+ int nentries;
+{
+ VARLIST *vlist;
+
+ vlist = (VARLIST *)xmalloc (sizeof (VARLIST));
+ vlist->list = (SHELL_VAR **)xmalloc ((nentries + 1) * sizeof (SHELL_VAR *));
+ vlist->list_size = nentries;
+ vlist->list_len = 0;
+ vlist->list[0] = (SHELL_VAR *)NULL;
+
+ return vlist;
+}
+
+static VARLIST *
+vlist_realloc (vlist, n)
+ VARLIST *vlist;
+ int n;
+{
+ if (vlist == 0)
+ return (vlist = vlist_alloc (n));
+ if (n > vlist->list_size)
+ {
+ vlist->list_size = n;
+ vlist->list = (SHELL_VAR **)xrealloc (vlist->list, (vlist->list_size + 1) * sizeof (SHELL_VAR *));
+ }
+ return vlist;
+}
+
+static void
+vlist_add (vlist, var, flags)
+ VARLIST *vlist;
+ SHELL_VAR *var;
+ int flags;
+{
+ register int i;
+
+ for (i = 0; i < vlist->list_len; i++)
+ if (STREQ (var->name, vlist->list[i]->name))
+ break;
+ if (i < vlist->list_len)
+ return;
+
+ if (i >= vlist->list_size)
+ vlist = vlist_realloc (vlist, vlist->list_size + 16);
+
+ vlist->list[vlist->list_len++] = var;
+ vlist->list[vlist->list_len] = (SHELL_VAR *)NULL;
+}
+
+/* Map FUNCTION over the variables in VAR_HASH_TABLE. Return an array of the
+ variables for which FUNCTION returns a non-zero value. A NULL value
+ for FUNCTION means to use all variables. */
+SHELL_VAR **
+map_over (function, vc)
+ sh_var_map_func_t *function;
+ VAR_CONTEXT *vc;
+{
+ VAR_CONTEXT *v;
+ VARLIST *vlist;
+ SHELL_VAR **ret;
+ int nentries;
+
+ for (nentries = 0, v = vc; v; v = v->down)
+ nentries += HASH_ENTRIES (v->table);
+
+ if (nentries == 0)
+ return (SHELL_VAR **)NULL;
+
+ vlist = vlist_alloc (nentries);
+
+ for (v = vc; v; v = v->down)
+ flatten (v->table, function, vlist, 0);
+
+ ret = vlist->list;
+ free (vlist);
+ return ret;
+}
+
+SHELL_VAR **
+map_over_funcs (function)
+ sh_var_map_func_t *function;
+{
+ VARLIST *vlist;
+ SHELL_VAR **ret;
+
+ if (shell_functions == 0 || HASH_ENTRIES (shell_functions) == 0)
+ return ((SHELL_VAR **)NULL);
+
+ vlist = vlist_alloc (HASH_ENTRIES (shell_functions));
+
+ flatten (shell_functions, function, vlist, 0);
+
+ ret = vlist->list;
+ free (vlist);
+ return ret;
+}
+
+/* Flatten VAR_HASH_TABLE, applying FUNC to each member and adding those
+ elements for which FUNC succeeds to VLIST->list. FLAGS is reserved
+ for future use. Only unique names are added to VLIST. If FUNC is
+ NULL, each variable in VAR_HASH_TABLE is added to VLIST. If VLIST is
+ NULL, FUNC is applied to each SHELL_VAR in VAR_HASH_TABLE. If VLIST
+ and FUNC are both NULL, nothing happens. */
+static void
+flatten (var_hash_table, func, vlist, flags)
+ HASH_TABLE *var_hash_table;
+ sh_var_map_func_t *func;
+ VARLIST *vlist;
+ int flags;
+{
+ register int i;
+ register BUCKET_CONTENTS *tlist;
+ int r;
+ SHELL_VAR *var;
+
+ if (var_hash_table == 0 || (HASH_ENTRIES (var_hash_table) == 0) || (vlist == 0 && func == 0))
+ return;
+
+ for (i = 0; i < var_hash_table->nbuckets; i++)
+ {
+ for (tlist = hash_items (i, var_hash_table); tlist; tlist = tlist->next)
+ {
+ var = (SHELL_VAR *)tlist->data;
+
+ r = func ? (*func) (var) : 1;
+ if (r && vlist)
+ vlist_add (vlist, var, flags);
+ }
+ }
+}
+
+void
+sort_variables (array)
+ SHELL_VAR **array;
+{
+ qsort (array, strvec_len ((char **)array), sizeof (SHELL_VAR *), (QSFUNC *)qsort_var_comp);
+}
+
+static int
+qsort_var_comp (var1, var2)
+ SHELL_VAR **var1, **var2;
+{
+ int result;
+
+ if ((result = (*var1)->name[0] - (*var2)->name[0]) == 0)
+ result = strcmp ((*var1)->name, (*var2)->name);
+
+ return (result);
+}
+
+/* Apply FUNC to each variable in SHELL_VARIABLES, adding each one for
+ which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */
+static SHELL_VAR **
+vapply (func)
+ sh_var_map_func_t *func;
+{
+ SHELL_VAR **list;
+
+ list = map_over (func, shell_variables);
+ if (list /* && posixly_correct */)
+ sort_variables (list);
+ return (list);
+}
+
+/* Apply FUNC to each variable in SHELL_FUNCTIONS, adding each one for
+ which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */
+static SHELL_VAR **
+fapply (func)
+ sh_var_map_func_t *func;
+{
+ SHELL_VAR **list;
+
+ list = map_over_funcs (func);
+ if (list /* && posixly_correct */)
+ sort_variables (list);
+ return (list);
+}
+
+/* Create a NULL terminated array of all the shell variables. */
+SHELL_VAR **
+all_shell_variables ()
+{
+ return (vapply ((sh_var_map_func_t *)NULL));
+}
+
+/* Create a NULL terminated array of all the shell functions. */
+SHELL_VAR **
+all_shell_functions ()
+{
+ return (fapply ((sh_var_map_func_t *)NULL));
+}
+
+static int
+visible_var (var)
+ SHELL_VAR *var;
+{
+ return (invisible_p (var) == 0);
+}
+
+SHELL_VAR **
+all_visible_functions ()
+{
+ return (fapply (visible_var));
+}
+
+SHELL_VAR **
+all_visible_variables ()
+{
+ return (vapply (visible_var));
+}
+
+/* Return non-zero if the variable VAR is visible and exported. Array
+ variables cannot be exported. */
+static int
+visible_and_exported (var)
+ SHELL_VAR *var;
+{
+ return (invisible_p (var) == 0 && exported_p (var));
+}
+
+/* Candidate variables for the export environment are either valid variables
+ with the export attribute or invalid variables inherited from the initial
+ environment and simply passed through. */
+static int
+export_environment_candidate (var)
+ SHELL_VAR *var;
+{
+ return (exported_p (var) && (invisible_p (var) == 0 || imported_p (var)));
+}
+
+/* Return non-zero if VAR is a local variable in the current context and
+ is exported. */
+static int
+local_and_exported (var)
+ SHELL_VAR *var;
+{
+ return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context && exported_p (var));
+}
+
+SHELL_VAR **
+all_exported_variables ()
+{
+ return (vapply (visible_and_exported));
+}
+
+SHELL_VAR **
+local_exported_variables ()
+{
+ return (vapply (local_and_exported));
+}
+
+static int
+variable_in_context (var)
+ SHELL_VAR *var;
+{
+ return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context);
+}
+
+SHELL_VAR **
+all_local_variables ()
+{
+ VARLIST *vlist;
+ SHELL_VAR **ret;
+ VAR_CONTEXT *vc;
+
+ vc = shell_variables;
+ for (vc = shell_variables; vc; vc = vc->down)
+ if (vc_isfuncenv (vc) && vc->scope == variable_context)
+ break;
+
+ if (vc == 0)
+ {
+ internal_error (_("all_local_variables: no function context at current scope"));
+ return (SHELL_VAR **)NULL;
+ }
+ if (vc->table == 0 || HASH_ENTRIES (vc->table) == 0 || vc_haslocals (vc) == 0)
+ return (SHELL_VAR **)NULL;
+
+ vlist = vlist_alloc (HASH_ENTRIES (vc->table));
+
+ flatten (vc->table, variable_in_context, vlist, 0);
+
+ ret = vlist->list;
+ free (vlist);
+ if (ret)
+ sort_variables (ret);
+ return ret;
+}
+
+#if defined (ARRAY_VARS)
+/* Return non-zero if the variable VAR is visible and an array. */
+static int
+visible_array_vars (var)
+ SHELL_VAR *var;
+{
+ return (invisible_p (var) == 0 && array_p (var));
+}
+
+SHELL_VAR **
+all_array_variables ()
+{
+ return (vapply (visible_array_vars));
+}
+#endif /* ARRAY_VARS */
+
+char **
+all_variables_matching_prefix (prefix)
+ const char *prefix;
+{
+ SHELL_VAR **varlist;
+ char **rlist;
+ int vind, rind, plen;
+
+ plen = STRLEN (prefix);
+ varlist = all_visible_variables ();
+ for (vind = 0; varlist && varlist[vind]; vind++)
+ ;
+ if (varlist == 0 || vind == 0)
+ return ((char **)NULL);
+ rlist = strvec_create (vind + 1);
+ for (vind = rind = 0; varlist[vind]; vind++)
+ {
+ if (plen == 0 || STREQN (prefix, varlist[vind]->name, plen))
+ rlist[rind++] = savestring (varlist[vind]->name);
+ }
+ rlist[rind] = (char *)0;
+ free (varlist);
+
+ return rlist;
+}
+
+/* **************************************************************** */
+/* */
+/* Managing temporary variable scopes */
+/* */
+/* **************************************************************** */
+
+/* Make variable NAME have VALUE in the temporary environment. */
+static SHELL_VAR *
+bind_tempenv_variable (name, value)
+ const char *name;
+ char *value;
+{
+ SHELL_VAR *var;
+
+ var = temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL;
+
+ if (var)
+ {
+ FREE (value_cell (var));
+ var_setvalue (var, savestring (value));
+ INVALIDATE_EXPORTSTR (var);
+ }
+
+ return (var);
+}
+
+/* Find a variable in the temporary environment that is named NAME.
+ Return the SHELL_VAR *, or NULL if not found. */
+SHELL_VAR *
+find_tempenv_variable (name)
+ const char *name;
+{
+ return (temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL);
+}
+
+char **tempvar_list;
+int tvlist_ind;
+
+/* Push the variable described by (SHELL_VAR *)DATA down to the next
+ variable context from the temporary environment. */
+static void
+push_temp_var (data)
+ PTR_T data;
+{
+ SHELL_VAR *var, *v;
+ HASH_TABLE *binding_table;
+
+ var = (SHELL_VAR *)data;
+
+ binding_table = shell_variables->table;
+ if (binding_table == 0)
+ {
+ if (shell_variables == global_variables)
+ /* shouldn't happen */
+ binding_table = shell_variables->table = global_variables->table = hash_create (0);
+ else
+ binding_table = shell_variables->table = hash_create (TEMPENV_HASH_BUCKETS);
+ }
+
+ v = bind_variable_internal (var->name, value_cell (var), binding_table, 0, 0);
+
+ /* XXX - should we set the context here? It shouldn't matter because of how
+ assign_in_env works, but might want to check. */
+ if (binding_table == global_variables->table) /* XXX */
+ var->attributes &= ~(att_tempvar|att_propagate);
+ else
+ {
+ var->attributes |= att_propagate;
+ if (binding_table == shell_variables->table)
+ shell_variables->flags |= VC_HASTMPVAR;
+ }
+ v->attributes |= var->attributes;
+
+ if (find_special_var (var->name) >= 0)
+ tempvar_list[tvlist_ind++] = savestring (var->name);
+
+ dispose_variable (var);
+}
+
+static void
+propagate_temp_var (data)
+ PTR_T data;
+{
+ SHELL_VAR *var;
+
+ var = (SHELL_VAR *)data;
+ if (tempvar_p (var) && (var->attributes & att_propagate))
+ push_temp_var (data);
+ else
+ {
+ if (find_special_var (var->name) >= 0)
+ tempvar_list[tvlist_ind++] = savestring (var->name);
+ dispose_variable (var);
+ }
+}
+
+/* Free the storage used in the hash table for temporary
+ environment variables. PUSHF is a function to be called
+ to free each hash table entry. It takes care of pushing variables
+ to previous scopes if appropriate. PUSHF stores names of variables
+ that require special handling (e.g., IFS) on tempvar_list, so this
+ function can call stupidly_hack_special_variables on all the
+ variables in the list when the temporary hash table is destroyed. */
+static void
+dispose_temporary_env (pushf)
+ sh_free_func_t *pushf;
+{
+ int i;
+
+ tempvar_list = strvec_create (HASH_ENTRIES (temporary_env) + 1);
+ tempvar_list[tvlist_ind = 0] = 0;
+
+ hash_flush (temporary_env, pushf);
+ hash_dispose (temporary_env);
+ temporary_env = (HASH_TABLE *)NULL;
+
+ tempvar_list[tvlist_ind] = 0;
+
+ array_needs_making = 1;
+
+#if 0
+ sv_ifs ("IFS"); /* XXX here for now -- check setifs in assign_in_env */
+#endif
+ for (i = 0; i < tvlist_ind; i++)
+ stupidly_hack_special_variables (tempvar_list[i]);
+
+ strvec_dispose (tempvar_list);
+ tempvar_list = 0;
+ tvlist_ind = 0;
+}
+
+void
+dispose_used_env_vars ()
+{
+ if (temporary_env)
+ {
+ dispose_temporary_env (propagate_temp_var);
+ maybe_make_export_env ();
+ }
+}
+
+/* Take all of the shell variables in the temporary environment HASH_TABLE
+ and make shell variables from them at the current variable context. */
+void
+merge_temporary_env ()
+{
+ if (temporary_env)
+ dispose_temporary_env (push_temp_var);
+}
+
+/* **************************************************************** */
+/* */
+/* Creating and manipulating the environment */
+/* */
+/* **************************************************************** */
+
+static inline char *
+mk_env_string (name, value)
+ const char *name, *value;
+{
+ int name_len, value_len;
+ char *p;
+
+ name_len = strlen (name);
+ value_len = STRLEN (value);
+ p = (char *)xmalloc (2 + name_len + value_len);
+ strcpy (p, name);
+ p[name_len] = '=';
+ if (value && *value)
+ strcpy (p + name_len + 1, value);
+ else
+ p[name_len + 1] = '\0';
+ return (p);
+}
+
+#ifdef DEBUG
+/* Debugging */
+static int
+valid_exportstr (v)
+ SHELL_VAR *v;
+{
+ char *s;
+
+ s = v->exportstr;
+ if (s == 0)
+ {
+ internal_error (_("%s has null exportstr"), v->name);
+ return (0);
+ }
+ if (legal_variable_starter ((unsigned char)*s) == 0)
+ {
+ internal_error (_("invalid character %d in exportstr for %s"), *s, v->name);
+ return (0);
+ }
+ for (s = v->exportstr + 1; s && *s; s++)
+ {
+ if (*s == '=')
+ break;
+ if (legal_variable_char ((unsigned char)*s) == 0)
+ {
+ internal_error (_("invalid character %d in exportstr for %s"), *s, v->name);
+ return (0);
+ }
+ }
+ if (*s != '=')
+ {
+ internal_error (_("no `=' in exportstr for %s"), v->name);
+ return (0);
+ }
+ return (1);
+}
+#endif
+
+static char **
+make_env_array_from_var_list (vars)
+ SHELL_VAR **vars;
+{
+ register int i, list_index;
+ register SHELL_VAR *var;
+ char **list, *value;
+
+ list = strvec_create ((1 + strvec_len ((char **)vars)));
+
+#define USE_EXPORTSTR (value == var->exportstr)
+
+ for (i = 0, list_index = 0; var = vars[i]; i++)
+ {
+#if defined (__CYGWIN__)
+ /* We don't use the exportstr stuff on Cygwin at all. */
+ INVALIDATE_EXPORTSTR (var);
+#endif
+ if (var->exportstr)
+ value = var->exportstr;
+ else if (function_p (var))
+ value = named_function_string ((char *)NULL, function_cell (var), 0);
+#if defined (ARRAY_VARS)
+ else if (array_p (var))
+# if ARRAY_EXPORT
+ value = array_to_assignment_string (array_cell (var));
+# else
+ continue; /* XXX array vars cannot yet be exported */
+# endif /* ARRAY_EXPORT */
+ else if (assoc_p (var))
+# if 0
+ value = assoc_to_assignment_string (assoc_cell (var));
+# else
+ continue; /* XXX associative array vars cannot yet be exported */
+# endif
+#endif
+ else
+ value = value_cell (var);
+
+ if (value)
+ {
+ /* Gee, I'd like to get away with not using savestring() if we're
+ using the cached exportstr... */
+ list[list_index] = USE_EXPORTSTR ? savestring (value)
+ : mk_env_string (var->name, value);
+
+ if (USE_EXPORTSTR == 0)
+ SAVE_EXPORTSTR (var, list[list_index]);
+
+ list_index++;
+#undef USE_EXPORTSTR
+
+#if 0 /* not yet */
+#if defined (ARRAY_VARS)
+ if (array_p (var) || assoc_p (var))
+ free (value);
+#endif
+#endif
+ }
+ }
+
+ list[list_index] = (char *)NULL;
+ return (list);
+}
+
+/* Make an array of assignment statements from the hash table
+ HASHED_VARS which contains SHELL_VARs. Only visible, exported
+ variables are eligible. */
+static char **
+make_var_export_array (vcxt)
+ VAR_CONTEXT *vcxt;
+{
+ char **list;
+ SHELL_VAR **vars;
+
+#if 0
+ vars = map_over (visible_and_exported, vcxt);
+#else
+ vars = map_over (export_environment_candidate, vcxt);
+#endif
+
+ if (vars == 0)
+ return (char **)NULL;
+
+ list = make_env_array_from_var_list (vars);
+
+ free (vars);
+ return (list);
+}
+
+static char **
+make_func_export_array ()
+{
+ char **list;
+ SHELL_VAR **vars;
+
+ vars = map_over_funcs (visible_and_exported);
+ if (vars == 0)
+ return (char **)NULL;
+
+ list = make_env_array_from_var_list (vars);
+
+ free (vars);
+ return (list);
+}
+
+/* Add ENVSTR to the end of the exported environment, EXPORT_ENV. */
+#define add_to_export_env(envstr,do_alloc) \
+do \
+ { \
+ if (export_env_index >= (export_env_size - 1)) \
+ { \
+ export_env_size += 16; \
+ export_env = strvec_resize (export_env, export_env_size); \
+ environ = export_env; \
+ } \
+ export_env[export_env_index++] = (do_alloc) ? savestring (envstr) : envstr; \
+ export_env[export_env_index] = (char *)NULL; \
+ } while (0)
+
+/* Add ASSIGN to EXPORT_ENV, or supercede a previous assignment in the
+ array with the same left-hand side. Return the new EXPORT_ENV. */
+char **
+add_or_supercede_exported_var (assign, do_alloc)
+ char *assign;
+ int do_alloc;
+{
+ register int i;
+ int equal_offset;
+
+ equal_offset = assignment (assign, 0);
+ if (equal_offset == 0)
+ return (export_env);
+
+ /* If this is a function, then only supersede the function definition.
+ We do this by including the `=() {' in the comparison, like
+ initialize_shell_variables does. */
+ if (assign[equal_offset + 1] == '(' &&
+ strncmp (assign + equal_offset + 2, ") {", 3) == 0) /* } */
+ equal_offset += 4;
+
+ for (i = 0; i < export_env_index; i++)
+ {
+ if (STREQN (assign, export_env[i], equal_offset + 1))
+ {
+ free (export_env[i]);
+ export_env[i] = do_alloc ? savestring (assign) : assign;
+ return (export_env);
+ }
+ }
+ add_to_export_env (assign, do_alloc);
+ return (export_env);
+}
+
+static void
+add_temp_array_to_env (temp_array, do_alloc, do_supercede)
+ char **temp_array;
+ int do_alloc, do_supercede;
+{
+ register int i;
+
+ if (temp_array == 0)
+ return;
+
+ for (i = 0; temp_array[i]; i++)
+ {
+ if (do_supercede)
+ export_env = add_or_supercede_exported_var (temp_array[i], do_alloc);
+ else
+ add_to_export_env (temp_array[i], do_alloc);
+ }
+
+ free (temp_array);
+}
+
+/* Make the environment array for the command about to be executed, if the
+ array needs making. Otherwise, do nothing. If a shell action could
+ change the array that commands receive for their environment, then the
+ code should `array_needs_making++'.
+
+ The order to add to the array is:
+ temporary_env
+ list of var contexts whose head is shell_variables
+ shell_functions
+
+ This is the shell variable lookup order. We add only new variable
+ names at each step, which allows local variables and variables in
+ the temporary environments to shadow variables in the global (or
+ any previous) scope.
+*/
+
+static int
+n_shell_variables ()
+{
+ VAR_CONTEXT *vc;
+ int n;
+
+ for (n = 0, vc = shell_variables; vc; vc = vc->down)
+ n += HASH_ENTRIES (vc->table);
+ return n;
+}
+
+int
+chkexport (name)
+ char *name;
+{
+ SHELL_VAR *v;
+
+ v = find_variable (name);
+ if (v && exported_p (v))
+ {
+ array_needs_making = 1;
+ maybe_make_export_env ();
+ return 1;
+ }
+ return 0;
+}
+
+void
+maybe_make_export_env ()
+{
+ register char **temp_array;
+ int new_size;
+ VAR_CONTEXT *tcxt;
+
+ if (array_needs_making)
+ {
+ if (export_env)
+ strvec_flush (export_env);
+
+ /* Make a guess based on how many shell variables and functions we
+ have. Since there will always be array variables, and array
+ variables are not (yet) exported, this will always be big enough
+ for the exported variables and functions. */
+ new_size = n_shell_variables () + HASH_ENTRIES (shell_functions) + 1 +
+ HASH_ENTRIES (temporary_env);
+ if (new_size > export_env_size)
+ {
+ export_env_size = new_size;
+ export_env = strvec_resize (export_env, export_env_size);
+ environ = export_env;
+ }
+ export_env[export_env_index = 0] = (char *)NULL;
+
+ /* Make a dummy variable context from the temporary_env, stick it on
+ the front of shell_variables, call make_var_export_array on the
+ whole thing to flatten it, and convert the list of SHELL_VAR *s
+ to the form needed by the environment. */
+ if (temporary_env)
+ {
+ tcxt = new_var_context ((char *)NULL, 0);
+ tcxt->table = temporary_env;
+ tcxt->down = shell_variables;
+ }
+ else
+ tcxt = shell_variables;
+
+ temp_array = make_var_export_array (tcxt);
+ if (temp_array)
+ add_temp_array_to_env (temp_array, 0, 0);
+
+ if (tcxt != shell_variables)
+ free (tcxt);
+
+#if defined (RESTRICTED_SHELL)
+ /* Restricted shells may not export shell functions. */
+ temp_array = restricted ? (char **)0 : make_func_export_array ();
+#else
+ temp_array = make_func_export_array ();
+#endif
+ if (temp_array)
+ add_temp_array_to_env (temp_array, 0, 0);
+
+ array_needs_making = 0;
+ }
+}
+
+/* This is an efficiency hack. PWD and OLDPWD are auto-exported, so
+ we will need to remake the exported environment every time we
+ change directories. `_' is always put into the environment for
+ every external command, so without special treatment it will always
+ cause the environment to be remade.
+
+ If there is no other reason to make the exported environment, we can
+ just update the variables in place and mark the exported environment
+ as no longer needing a remake. */
+void
+update_export_env_inplace (env_prefix, preflen, value)
+ char *env_prefix;
+ int preflen;
+ char *value;
+{
+ char *evar;
+
+ evar = (char *)xmalloc (STRLEN (value) + preflen + 1);
+ strcpy (evar, env_prefix);
+ if (value)
+ strcpy (evar + preflen, value);
+ export_env = add_or_supercede_exported_var (evar, 0);
+}
+
+/* We always put _ in the environment as the name of this command. */
+void
+put_command_name_into_env (command_name)
+ char *command_name;
+{
+ update_export_env_inplace ("_=", 2, command_name);
+}
+
+/* **************************************************************** */
+/* */
+/* Managing variable contexts */
+/* */
+/* **************************************************************** */
+
+/* Allocate and return a new variable context with NAME and FLAGS.
+ NAME can be NULL. */
+
+VAR_CONTEXT *
+new_var_context (name, flags)
+ char *name;
+ int flags;
+{
+ VAR_CONTEXT *vc;
+
+ vc = (VAR_CONTEXT *)xmalloc (sizeof (VAR_CONTEXT));
+ vc->name = name ? savestring (name) : (char *)NULL;
+ vc->scope = variable_context;
+ vc->flags = flags;
+
+ vc->up = vc->down = (VAR_CONTEXT *)NULL;
+ vc->table = (HASH_TABLE *)NULL;
+
+ return vc;
+}
+
+/* Free a variable context and its data, including the hash table. Dispose
+ all of the variables. */
+void
+dispose_var_context (vc)
+ VAR_CONTEXT *vc;
+{
+ FREE (vc->name);
+
+ if (vc->table)
+ {
+ delete_all_variables (vc->table);
+ hash_dispose (vc->table);
+ }
+
+ free (vc);
+}
+
+/* Set VAR's scope level to the current variable context. */
+static int
+set_context (var)
+ SHELL_VAR *var;
+{
+ return (var->context = variable_context);
+}
+
+/* Make a new variable context with NAME and FLAGS and a HASH_TABLE of
+ temporary variables, and push it onto shell_variables. This is
+ for shell functions. */
+VAR_CONTEXT *
+push_var_context (name, flags, tempvars)
+ char *name;
+ int flags;
+ HASH_TABLE *tempvars;
+{
+ VAR_CONTEXT *vc;
+
+ vc = new_var_context (name, flags);
+ vc->table = tempvars;
+ if (tempvars)
+ {
+ /* Have to do this because the temp environment was created before
+ variable_context was incremented. */
+ flatten (tempvars, set_context, (VARLIST *)NULL, 0);
+ vc->flags |= VC_HASTMPVAR;
+ }
+ vc->down = shell_variables;
+ shell_variables->up = vc;
+
+ return (shell_variables = vc);
+}
+
+static void
+push_func_var (data)
+ PTR_T data;
+{
+ SHELL_VAR *var, *v;
+
+ var = (SHELL_VAR *)data;
+
+ if (tempvar_p (var) && (posixly_correct || (var->attributes & att_propagate)))
+ {
+ /* Make sure we have a hash table to store the variable in while it is
+ being propagated down to the global variables table. Create one if
+ we have to */
+ if ((vc_isfuncenv (shell_variables) || vc_istempenv (shell_variables)) && shell_variables->table == 0)
+ shell_variables->table = hash_create (0);
+ /* XXX - should we set v->context here? */
+ v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0);
+ if (shell_variables == global_variables)
+ var->attributes &= ~(att_tempvar|att_propagate);
+ else
+ shell_variables->flags |= VC_HASTMPVAR;
+ v->attributes |= var->attributes;
+ }
+ else
+ stupidly_hack_special_variables (var->name); /* XXX */
+
+ dispose_variable (var);
+}
+
+/* Pop the top context off of VCXT and dispose of it, returning the rest of
+ the stack. */
+void
+pop_var_context ()
+{
+ VAR_CONTEXT *ret, *vcxt;
+
+ vcxt = shell_variables;
+ if (vc_isfuncenv (vcxt) == 0)
+ {
+ internal_error (_("pop_var_context: head of shell_variables not a function context"));
+ return;
+ }
+
+ if (ret = vcxt->down)
+ {
+ ret->up = (VAR_CONTEXT *)NULL;
+ shell_variables = ret;
+ if (vcxt->table)
+ hash_flush (vcxt->table, push_func_var);
+ dispose_var_context (vcxt);
+ }
+ else
+ internal_error (_("pop_var_context: no global_variables context"));
+}
+
+/* Delete the HASH_TABLEs for all variable contexts beginning at VCXT, and
+ all of the VAR_CONTEXTs except GLOBAL_VARIABLES. */
+void
+delete_all_contexts (vcxt)
+ VAR_CONTEXT *vcxt;
+{
+ VAR_CONTEXT *v, *t;
+
+ for (v = vcxt; v != global_variables; v = t)
+ {
+ t = v->down;
+ dispose_var_context (v);
+ }
+
+ delete_all_variables (global_variables->table);
+ shell_variables = global_variables;
+}
+
+/* **************************************************************** */
+/* */
+/* Pushing and Popping temporary variable scopes */
+/* */
+/* **************************************************************** */
+
+VAR_CONTEXT *
+push_scope (flags, tmpvars)
+ int flags;
+ HASH_TABLE *tmpvars;
+{
+ return (push_var_context ((char *)NULL, flags, tmpvars));
+}
+
+static void
+push_exported_var (data)
+ PTR_T data;
+{
+ SHELL_VAR *var, *v;
+
+ var = (SHELL_VAR *)data;
+
+ /* If a temp var had its export attribute set, or it's marked to be
+ propagated, bind it in the previous scope before disposing it. */
+ /* XXX - This isn't exactly right, because all tempenv variables have the
+ export attribute set. */
+#if 0
+ if (exported_p (var) || (var->attributes & att_propagate))
+#else
+ if (tempvar_p (var) && exported_p (var) && (var->attributes & att_propagate))
+#endif
+ {
+ var->attributes &= ~att_tempvar; /* XXX */
+ v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0);
+ if (shell_variables == global_variables)
+ var->attributes &= ~att_propagate;
+ v->attributes |= var->attributes;
+ }
+ else
+ stupidly_hack_special_variables (var->name); /* XXX */
+
+ dispose_variable (var);
+}
+
+void
+pop_scope (is_special)
+ int is_special;
+{
+ VAR_CONTEXT *vcxt, *ret;
+
+ vcxt = shell_variables;
+ if (vc_istempscope (vcxt) == 0)
+ {
+ internal_error (_("pop_scope: head of shell_variables not a temporary environment scope"));
+ return;
+ }
+
+ ret = vcxt->down;
+ if (ret)
+ ret->up = (VAR_CONTEXT *)NULL;
+
+ shell_variables = ret;
+
+ /* Now we can take care of merging variables in VCXT into set of scopes
+ whose head is RET (shell_variables). */
+ FREE (vcxt->name);
+ if (vcxt->table)
+ {
+ if (is_special)
+ hash_flush (vcxt->table, push_func_var);
+ else
+ hash_flush (vcxt->table, push_exported_var);
+ hash_dispose (vcxt->table);
+ }
+ free (vcxt);
+
+ sv_ifs ("IFS"); /* XXX here for now */
+}
+
+/* **************************************************************** */
+/* */
+/* Pushing and Popping function contexts */
+/* */
+/* **************************************************************** */
+
+static WORD_LIST **dollar_arg_stack = (WORD_LIST **)NULL;
+static int dollar_arg_stack_slots;
+static int dollar_arg_stack_index;
+
+/* XXX - we might want to consider pushing and popping the `getopts' state
+ when we modify the positional parameters. */
+void
+push_context (name, is_subshell, tempvars)
+ char *name; /* function name */
+ int is_subshell;
+ HASH_TABLE *tempvars;
+{
+ if (is_subshell == 0)
+ push_dollar_vars ();
+ variable_context++;
+ push_var_context (name, VC_FUNCENV, tempvars);
+}
+
+/* Only called when subshell == 0, so we don't need to check, and can
+ unconditionally pop the dollar vars off the stack. */
+void
+pop_context ()
+{
+ pop_dollar_vars ();
+ variable_context--;
+ pop_var_context ();
+
+ sv_ifs ("IFS"); /* XXX here for now */
+}
+
+/* Save the existing positional parameters on a stack. */
+void
+push_dollar_vars ()
+{
+ if (dollar_arg_stack_index + 2 > dollar_arg_stack_slots)
+ {
+ dollar_arg_stack = (WORD_LIST **)
+ xrealloc (dollar_arg_stack, (dollar_arg_stack_slots += 10)
+ * sizeof (WORD_LIST *));
+ }
+ dollar_arg_stack[dollar_arg_stack_index++] = list_rest_of_args ();
+ dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
+}
+
+/* Restore the positional parameters from our stack. */
+void
+pop_dollar_vars ()
+{
+ if (!dollar_arg_stack || dollar_arg_stack_index == 0)
+ return;
+
+ remember_args (dollar_arg_stack[--dollar_arg_stack_index], 1);
+ dispose_words (dollar_arg_stack[dollar_arg_stack_index]);
+ dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
+ set_dollar_vars_unchanged ();
+}
+
+void
+dispose_saved_dollar_vars ()
+{
+ if (!dollar_arg_stack || dollar_arg_stack_index == 0)
+ return;
+
+ dispose_words (dollar_arg_stack[dollar_arg_stack_index]);
+ dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
+}
+
+/* Manipulate the special BASH_ARGV and BASH_ARGC variables. */
+
+void
+push_args (list)
+ WORD_LIST *list;
+{
+#if defined (ARRAY_VARS) && defined (DEBUGGER)
+ SHELL_VAR *bash_argv_v, *bash_argc_v;
+ ARRAY *bash_argv_a, *bash_argc_a;
+ WORD_LIST *l;
+ arrayind_t i;
+ char *t;
+
+ GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a);
+ GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a);
+
+ for (l = list, i = 0; l; l = l->next, i++)
+ array_push (bash_argv_a, l->word->word);
+
+ t = itos (i);
+ array_push (bash_argc_a, t);
+ free (t);
+#endif /* ARRAY_VARS && DEBUGGER */
+}
+
+/* Remove arguments from BASH_ARGV array. Pop top element off BASH_ARGC
+ array and use that value as the count of elements to remove from
+ BASH_ARGV. */
+void
+pop_args ()
+{
+#if defined (ARRAY_VARS) && defined (DEBUGGER)
+ SHELL_VAR *bash_argv_v, *bash_argc_v;
+ ARRAY *bash_argv_a, *bash_argc_a;
+ ARRAY_ELEMENT *ce;
+ intmax_t i;
+
+ GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a);
+ GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a);
+
+ ce = array_shift (bash_argc_a, 1, 0);
+ if (ce == 0 || legal_number (element_value (ce), &i) == 0)
+ i = 0;
+
+ for ( ; i > 0; i--)
+ array_pop (bash_argv_a);
+ array_dispose_element (ce);
+#endif /* ARRAY_VARS && DEBUGGER */
+}
+
+/*************************************************
+ * *
+ * Functions to manage special variables *
+ * *
+ *************************************************/
+
+/* Extern declarations for variables this code has to manage. */
+extern int eof_encountered, eof_encountered_limit, ignoreeof;
+
+#if defined (READLINE)
+extern int hostname_list_initialized;
+#endif
+
+/* An alist of name.function for each special variable. Most of the
+ functions don't do much, and in fact, this would be faster with a
+ switch statement, but by the end of this file, I am sick of switch
+ statements. */
+
+#define SET_INT_VAR(name, intvar) intvar = find_variable (name) != 0
+
+/* This table will be sorted with qsort() the first time it's accessed. */
+struct name_and_function {
+ char *name;
+ sh_sv_func_t *function;
+};
+
+static struct name_and_function special_vars[] = {
+ { "BASH_COMPAT", sv_shcompat },
+ { "BASH_XTRACEFD", sv_xtracefd },
+
+#if defined (JOB_CONTROL)
+ { "CHILD_MAX", sv_childmax },
+#endif
+
+#if defined (READLINE)
+# if defined (STRICT_POSIX)
+ { "COLUMNS", sv_winsize },
+# endif
+ { "COMP_WORDBREAKS", sv_comp_wordbreaks },
+#endif
+
+ { "FUNCNEST", sv_funcnest },
+
+ { "GLOBIGNORE", sv_globignore },
+
+#if defined (HISTORY)
+ { "HISTCONTROL", sv_history_control },
+ { "HISTFILESIZE", sv_histsize },
+ { "HISTIGNORE", sv_histignore },
+ { "HISTSIZE", sv_histsize },
+ { "HISTTIMEFORMAT", sv_histtimefmt },
+#endif
+
+#if defined (__CYGWIN__)
+ { "HOME", sv_home },
+#endif
+
+#if defined (READLINE)
+ { "HOSTFILE", sv_hostfile },
+#endif
+
+ { "IFS", sv_ifs },
+ { "IGNOREEOF", sv_ignoreeof },
+
+ { "LANG", sv_locale },
+ { "LC_ALL", sv_locale },
+ { "LC_COLLATE", sv_locale },
+ { "LC_CTYPE", sv_locale },
+ { "LC_MESSAGES", sv_locale },
+ { "LC_NUMERIC", sv_locale },
+ { "LC_TIME", sv_locale },
+
+#if defined (READLINE) && defined (STRICT_POSIX)
+ { "LINES", sv_winsize },
+#endif
+
+ { "MAIL", sv_mail },
+ { "MAILCHECK", sv_mail },
+ { "MAILPATH", sv_mail },
+
+ { "OPTERR", sv_opterr },
+ { "OPTIND", sv_optind },
+
+ { "PATH", sv_path },
+ { "POSIXLY_CORRECT", sv_strict_posix },
+
+#if defined (READLINE)
+ { "TERM", sv_terminal },
+ { "TERMCAP", sv_terminal },
+ { "TERMINFO", sv_terminal },
+#endif /* READLINE */
+
+ { "TEXTDOMAIN", sv_locale },
+ { "TEXTDOMAINDIR", sv_locale },
+
+#if defined (HAVE_TZSET)
+ { "TZ", sv_tz },
+#endif
+
+#if defined (HISTORY) && defined (BANG_HISTORY)
+ { "histchars", sv_histchars },
+#endif /* HISTORY && BANG_HISTORY */
+
+ { "ignoreeof", sv_ignoreeof },
+
+ { (char *)0, (sh_sv_func_t *)0 }
+};
+
+#define N_SPECIAL_VARS (sizeof (special_vars) / sizeof (special_vars[0]) - 1)
+
+static int
+sv_compare (sv1, sv2)
+ struct name_and_function *sv1, *sv2;
+{
+ int r;
+
+ if ((r = sv1->name[0] - sv2->name[0]) == 0)
+ r = strcmp (sv1->name, sv2->name);
+ return r;
+}
+
+static inline int
+find_special_var (name)
+ const char *name;
+{
+ register int i, r;
+
+ for (i = 0; special_vars[i].name; i++)
+ {
+ r = special_vars[i].name[0] - name[0];
+ if (r == 0)
+ r = strcmp (special_vars[i].name, name);
+ if (r == 0)
+ return i;
+ else if (r > 0)
+ /* Can't match any of rest of elements in sorted list. Take this out
+ if it causes problems in certain environments. */
+ break;
+ }
+ return -1;
+}
+
+/* The variable in NAME has just had its state changed. Check to see if it
+ is one of the special ones where something special happens. */
+void
+stupidly_hack_special_variables (name)
+ char *name;
+{
+ static int sv_sorted = 0;
+ int i;
+
+ if (sv_sorted == 0) /* shouldn't need, but it's fairly cheap. */
+ {
+ qsort (special_vars, N_SPECIAL_VARS, sizeof (special_vars[0]),
+ (QSFUNC *)sv_compare);
+ sv_sorted = 1;
+ }
+
+ i = find_special_var (name);
+ if (i != -1)
+ (*(special_vars[i].function)) (name);
+}
+
+/* Special variables that need hooks to be run when they are unset as part
+ of shell reinitialization should have their sv_ functions run here. */
+void
+reinit_special_variables ()
+{
+#if defined (READLINE)
+ sv_comp_wordbreaks ("COMP_WORDBREAKS");
+#endif
+ sv_globignore ("GLOBIGNORE");
+ sv_opterr ("OPTERR");
+}
+
+void
+sv_ifs (name)
+ char *name;
+{
+ SHELL_VAR *v;
+
+ v = find_variable ("IFS");
+ setifs (v);
+}
+
+/* What to do just after the PATH variable has changed. */
+void
+sv_path (name)
+ char *name;
+{
+ /* hash -r */
+ phash_flush ();
+}
+
+/* What to do just after one of the MAILxxxx variables has changed. NAME
+ is the name of the variable. This is called with NAME set to one of
+ MAIL, MAILCHECK, or MAILPATH. */
+void
+sv_mail (name)
+ char *name;
+{
+ /* If the time interval for checking the files has changed, then
+ reset the mail timer. Otherwise, one of the pathname vars
+ to the users mailbox has changed, so rebuild the array of
+ filenames. */
+ if (name[4] == 'C') /* if (strcmp (name, "MAILCHECK") == 0) */
+ reset_mail_timer ();
+ else
+ {
+ free_mail_files ();
+ remember_mail_dates ();
+ }
+}
+
+void
+sv_funcnest (name)
+ char *name;
+{
+ SHELL_VAR *v;
+ intmax_t num;
+
+ v = find_variable (name);
+ if (v == 0)
+ funcnest_max = 0;
+ else if (legal_number (value_cell (v), &num) == 0)
+ funcnest_max = 0;
+ else
+ funcnest_max = num;
+}
+
+/* What to do when GLOBIGNORE changes. */
+void
+sv_globignore (name)
+ char *name;
+{
+ if (privileged_mode == 0)
+ setup_glob_ignore (name);
+}
+
+#if defined (READLINE)
+void
+sv_comp_wordbreaks (name)
+ char *name;
+{
+ SHELL_VAR *sv;
+
+ sv = find_variable (name);
+ if (sv == 0)
+ reset_completer_word_break_chars ();
+}
+
+/* What to do just after one of the TERMxxx variables has changed.
+ If we are an interactive shell, then try to reset the terminal
+ information in readline. */
+void
+sv_terminal (name)
+ char *name;
+{
+ if (interactive_shell && no_line_editing == 0)
+ rl_reset_terminal (get_string_value ("TERM"));
+}
+
+void
+sv_hostfile (name)
+ char *name;
+{
+ SHELL_VAR *v;
+
+ v = find_variable (name);
+ if (v == 0)
+ clear_hostname_list ();
+ else
+ hostname_list_initialized = 0;
+}
+
+#if defined (STRICT_POSIX)
+/* In strict posix mode, we allow assignments to LINES and COLUMNS (and values
+ found in the initial environment) to override the terminal size reported by
+ the kernel. */
+void
+sv_winsize (name)
+ char *name;
+{
+ SHELL_VAR *v;
+ intmax_t xd;
+ int d;
+
+ if (posixly_correct == 0 || interactive_shell == 0 || no_line_editing)
+ return;
+
+ v = find_variable (name);
+ if (v == 0 || var_isnull (v))
+ rl_reset_screen_size ();
+ else
+ {
+ if (legal_number (value_cell (v), &xd) == 0)
+ return;
+ winsize_assignment = 1;
+ d = xd; /* truncate */
+ if (name[0] == 'L') /* LINES */
+ rl_set_screen_size (d, -1);
+ else /* COLUMNS */
+ rl_set_screen_size (-1, d);
+ winsize_assignment = 0;
+ }
+}
+#endif /* STRICT_POSIX */
+#endif /* READLINE */
+
+/* Update the value of HOME in the export environment so tilde expansion will
+ work on cygwin. */
+#if defined (__CYGWIN__)
+sv_home (name)
+ char *name;
+{
+ array_needs_making = 1;
+ maybe_make_export_env ();
+}
+#endif
+
+#if defined (HISTORY)
+/* What to do after the HISTSIZE or HISTFILESIZE variables change.
+ If there is a value for this HISTSIZE (and it is numeric), then stifle
+ the history. Otherwise, if there is NO value for this variable,
+ unstifle the history. If name is HISTFILESIZE, and its value is
+ numeric, truncate the history file to hold no more than that many
+ lines. */
+void
+sv_histsize (name)
+ char *name;
+{
+ char *temp;
+ intmax_t num;
+ int hmax;
+
+ temp = get_string_value (name);
+
+ if (temp && *temp)
+ {
+ if (legal_number (temp, &num))
+ {
+ hmax = num;
+ if (hmax < 0 && name[4] == 'S')
+ unstifle_history (); /* unstifle history if HISTSIZE < 0 */
+ else if (name[4] == 'S')
+ {
+ stifle_history (hmax);
+ hmax = where_history ();
+ if (history_lines_this_session > hmax)
+ history_lines_this_session = hmax;
+ }
+ else if (hmax >= 0) /* truncate HISTFILE if HISTFILESIZE >= 0 */
+ {
+ history_truncate_file (get_string_value ("HISTFILE"), hmax);
+ if (hmax <= history_lines_in_file)
+ history_lines_in_file = hmax;
+ }
+ }
+ }
+ else if (name[4] == 'S')
+ unstifle_history ();
+}
+
+/* What to do after the HISTIGNORE variable changes. */
+void
+sv_histignore (name)
+ char *name;
+{
+ setup_history_ignore (name);
+}
+
+/* What to do after the HISTCONTROL variable changes. */
+void
+sv_history_control (name)
+ char *name;
+{
+ char *temp;
+ char *val;
+ int tptr;
+
+ history_control = 0;
+ temp = get_string_value (name);
+
+ if (temp == 0 || *temp == 0)
+ return;
+
+ tptr = 0;
+ while (val = extract_colon_unit (temp, &tptr))
+ {
+ if (STREQ (val, "ignorespace"))
+ history_control |= HC_IGNSPACE;
+ else if (STREQ (val, "ignoredups"))
+ history_control |= HC_IGNDUPS;
+ else if (STREQ (val, "ignoreboth"))
+ history_control |= HC_IGNBOTH;
+ else if (STREQ (val, "erasedups"))
+ history_control |= HC_ERASEDUPS;
+
+ free (val);
+ }
+}
+
+#if defined (BANG_HISTORY)
+/* Setting/unsetting of the history expansion character. */
+void
+sv_histchars (name)
+ char *name;
+{
+ char *temp;
+
+ temp = get_string_value (name);
+ if (temp)
+ {
+ history_expansion_char = *temp;
+ if (temp[0] && temp[1])
+ {
+ history_subst_char = temp[1];
+ if (temp[2])
+ history_comment_char = temp[2];
+ }
+ }
+ else
+ {
+ history_expansion_char = '!';
+ history_subst_char = '^';
+ history_comment_char = '#';
+ }
+}
+#endif /* BANG_HISTORY */
+
+void
+sv_histtimefmt (name)
+ char *name;
+{
+ SHELL_VAR *v;
+
+ if (v = find_variable (name))
+ {
+ if (history_comment_char == 0)
+ history_comment_char = '#';
+ }
+ history_write_timestamps = (v != 0);
+}
+#endif /* HISTORY */
+
+#if defined (HAVE_TZSET)
+void
+sv_tz (name)
+ char *name;
+{
+ if (chkexport (name))
+ tzset ();
+}
+#endif
+
+/* If the variable exists, then the value of it can be the number
+ of times we actually ignore the EOF. The default is small,
+ (smaller than csh, anyway). */
+void
+sv_ignoreeof (name)
+ char *name;
+{
+ SHELL_VAR *tmp_var;
+ char *temp;
+
+ eof_encountered = 0;
+
+ tmp_var = find_variable (name);
+ ignoreeof = tmp_var != 0;
+ temp = tmp_var ? value_cell (tmp_var) : (char *)NULL;
+ if (temp)
+ eof_encountered_limit = (*temp && all_digits (temp)) ? atoi (temp) : 10;
+ set_shellopts (); /* make sure `ignoreeof' is/is not in $SHELLOPTS */
+}
+
+void
+sv_optind (name)
+ char *name;
+{
+ char *tt;
+ int s;
+
+ tt = get_string_value ("OPTIND");
+ if (tt && *tt)
+ {
+ s = atoi (tt);
+
+ /* According to POSIX, setting OPTIND=1 resets the internal state
+ of getopt (). */
+ if (s < 0 || s == 1)
+ s = 0;
+ }
+ else
+ s = 0;
+ getopts_reset (s);
+}
+
+void
+sv_opterr (name)
+ char *name;
+{
+ char *tt;
+
+ tt = get_string_value ("OPTERR");
+ sh_opterr = (tt && *tt) ? atoi (tt) : 1;
+}
+
+void
+sv_strict_posix (name)
+ char *name;
+{
+ SET_INT_VAR (name, posixly_correct);
+ posix_initialize (posixly_correct);
+#if defined (READLINE)
+ if (interactive_shell)
+ posix_readline_initialize (posixly_correct);
+#endif /* READLINE */
+ set_shellopts (); /* make sure `posix' is/is not in $SHELLOPTS */
+}
+
+void
+sv_locale (name)
+ char *name;
+{
+ char *v;
+ int r;
+
+ v = get_string_value (name);
+ if (name[0] == 'L' && name[1] == 'A') /* LANG */
+ r = set_lang (name, v);
+ else
+ r = set_locale_var (name, v); /* LC_*, TEXTDOMAIN* */
+
+#if 1
+ if (r == 0 && posixly_correct)
+ last_command_exit_value = 1;
+#endif
+}
+
+#if defined (ARRAY_VARS)
+void
+set_pipestatus_array (ps, nproc)
+ int *ps;
+ int nproc;
+{
+ SHELL_VAR *v;
+ ARRAY *a;
+ ARRAY_ELEMENT *ae;
+ register int i;
+ char *t, tbuf[INT_STRLEN_BOUND(int) + 1];
+
+ v = find_variable ("PIPESTATUS");
+ if (v == 0)
+ v = make_new_array_variable ("PIPESTATUS");
+ if (array_p (v) == 0)
+ return; /* Do nothing if not an array variable. */
+ a = array_cell (v);
+
+ if (a == 0 || array_num_elements (a) == 0)
+ {
+ for (i = 0; i < nproc; i++) /* was ps[i] != -1, not i < nproc */
+ {
+ t = inttostr (ps[i], tbuf, sizeof (tbuf));
+ array_insert (a, i, t);
+ }
+ return;
+ }
+
+ /* Fast case */
+ if (array_num_elements (a) == nproc && nproc == 1)
+ {
+ ae = element_forw (a->head);
+ free (element_value (ae));
+ ae->value = itos (ps[0]);
+ }
+ else if (array_num_elements (a) <= nproc)
+ {
+ /* modify in array_num_elements members in place, then add */
+ ae = a->head;
+ for (i = 0; i < array_num_elements (a); i++)
+ {
+ ae = element_forw (ae);
+ free (element_value (ae));
+ ae->value = itos (ps[i]);
+ }
+ /* add any more */
+ for ( ; i < nproc; i++)
+ {
+ t = inttostr (ps[i], tbuf, sizeof (tbuf));
+ array_insert (a, i, t);
+ }
+ }
+ else
+ {
+ /* deleting elements. it's faster to rebuild the array. */
+ array_flush (a);
+ for (i = 0; ps[i] != -1; i++)
+ {
+ t = inttostr (ps[i], tbuf, sizeof (tbuf));
+ array_insert (a, i, t);
+ }
+ }
+}
+
+ARRAY *
+save_pipestatus_array ()
+{
+ SHELL_VAR *v;
+ ARRAY *a, *a2;
+
+ v = find_variable ("PIPESTATUS");
+ if (v == 0 || array_p (v) == 0 || array_cell (v) == 0)
+ return ((ARRAY *)NULL);
+
+ a = array_cell (v);
+ a2 = array_copy (array_cell (v));
+
+ return a2;
+}
+
+void
+restore_pipestatus_array (a)
+ ARRAY *a;
+{
+ SHELL_VAR *v;
+ ARRAY *a2;
+
+ v = find_variable ("PIPESTATUS");
+ /* XXX - should we still assign even if existing value is NULL? */
+ if (v == 0 || array_p (v) == 0 || array_cell (v) == 0)
+ return;
+
+ a2 = array_cell (v);
+ var_setarray (v, a);
+
+ array_dispose (a2);
+}
+#endif
+
+void
+set_pipestatus_from_exit (s)
+ int s;
+{
+#if defined (ARRAY_VARS)
+ static int v[2] = { 0, -1 };
+
+ v[0] = s;
+ set_pipestatus_array (v, 1);
+#endif
+}
+
+void
+sv_xtracefd (name)
+ char *name;
+{
+ SHELL_VAR *v;
+ char *t, *e;
+ int fd;
+ FILE *fp;
+
+ v = find_variable (name);
+ if (v == 0)
+ {
+ xtrace_reset ();
+ return;
+ }
+
+ t = value_cell (v);
+ if (t == 0 || *t == 0)
+ xtrace_reset ();
+ else
+ {
+ fd = (int)strtol (t, &e, 10);
+ if (e != t && *e == '\0' && sh_validfd (fd))
+ {
+ fp = fdopen (fd, "w");
+ if (fp == 0)
+ internal_error (_("%s: %s: cannot open as FILE"), name, value_cell (v));
+ else
+ xtrace_set (fd, fp);
+ }
+ else
+ internal_error (_("%s: %s: invalid value for trace file descriptor"), name, value_cell (v));
+ }
+}
+
+#define MIN_COMPAT_LEVEL 31
+
+void
+sv_shcompat (name)
+ char *name;
+{
+ SHELL_VAR *v;
+ char *val;
+ int tens, ones, compatval;
+
+ v = find_variable (name);
+ if (v == 0)
+ {
+ shell_compatibility_level = DEFAULT_COMPAT_LEVEL;
+ set_compatibility_opts ();
+ return;
+ }
+ val = value_cell (v);
+ if (val == 0 || *val == '\0')
+ {
+ shell_compatibility_level = DEFAULT_COMPAT_LEVEL;
+ set_compatibility_opts ();
+ return;
+ }
+ /* Handle decimal-like compatibility version specifications: 4.2 */
+ if (isdigit (val[0]) && val[1] == '.' && isdigit (val[2]) && val[3] == 0)
+ {
+ tens = val[0] - '0';
+ ones = val[2] - '0';
+ compatval = tens*10 + ones;
+ }
+ /* Handle integer-like compatibility version specifications: 42 */
+ else if (isdigit (val[0]) && isdigit (val[1]) && val[2] == 0)
+ {
+ tens = val[0] - '0';
+ ones = val[1] - '0';
+ compatval = tens*10 + ones;
+ }
+ else
+ {
+compat_error:
+ internal_error (_("%s: %s: compatibility value out of range"), name, val);
+ shell_compatibility_level = DEFAULT_COMPAT_LEVEL;
+ set_compatibility_opts ();
+ return;
+ }
+
+ if (compatval < MIN_COMPAT_LEVEL || compatval > DEFAULT_COMPAT_LEVEL)
+ goto compat_error;
+
+ shell_compatibility_level = compatval;
+ set_compatibility_opts ();
+}
+
+#if defined (JOB_CONTROL)
+void
+sv_childmax (name)
+ char *name;
+{
+ char *tt;
+ int s;
+
+ tt = get_string_value (name);
+ s = (tt && *tt) ? atoi (tt) : 0;
+ set_maxchild (s);
+}
+#endif
projects / thirdparty / bash.git / commitdiff
