1 /* shell.c -- GNU's idea of the POSIX shell specification. */
3 /* Copyright (C) 1987-2009 Free Software Foundation, Inc.
5 This file is part of GNU Bash, the Bourne Again SHell.
7 Bash is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 Bash is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Bash. If not, see <http://www.gnu.org/licenses/>.
23 Sunday, January 10th, 1988.
24 Initial author: Brian Fox
26 #define INSTALL_DEBUG_MODE
30 #include "bashtypes.h"
31 #if !defined (_MINIX) && defined (HAVE_SYS_FILE_H)
32 # include <sys/file.h>
34 #include "posixstat.h"
35 #include "posixtime.h"
43 #if defined (HAVE_UNISTD_H)
49 #define NEED_SH_SETLINEBUF_DECL /* used in externs.h */
54 #include "mailcheck.h"
56 #include "builtins/common.h"
58 #if defined (JOB_CONTROL)
60 #endif /* JOB_CONTROL */
63 #include "execute_cmd.h"
66 #if defined (USING_BASH_MALLOC) && defined (DEBUG) && !defined (DISABLE_MALLOC_WRAPPERS)
67 # include <malloc/shmalloc.h>
71 # include "bashhist.h"
72 # include <readline/history.h>
75 #if defined (READLINE)
76 # include "bashline.h"
79 #include <tilde/tilde.h>
80 #include <glob/strmatch.h>
82 #if defined (__OPENNT)
83 # include <opennt/opennt.h>
86 #if !defined (HAVE_GETPW_DECLS)
87 extern struct passwd
*getpwuid ();
88 #endif /* !HAVE_GETPW_DECLS */
94 #if defined (NO_MAIN_ENV_ARG)
95 extern char **environ
; /* used if no third argument to main() */
98 extern char *dist_version
, *release_status
;
99 extern int patch_level
, build_version
;
100 extern int shell_level
;
101 extern int subshell_environment
;
102 extern int last_command_exit_value
;
103 extern int line_number
;
104 extern int expand_aliases
;
105 extern int array_needs_making
;
106 extern int gnu_error_format
;
107 extern char *primary_prompt
, *secondary_prompt
;
108 extern char *this_command_name
;
110 /* Non-zero means that this shell has already been run; i.e. you should
111 call shell_reinitialize () if you need to start afresh. */
112 int shell_initialized
= 0;
114 COMMAND
*global_command
= (COMMAND
*)NULL
;
116 /* Information about the current user. */
117 struct user_info current_user
=
119 (uid_t
)-1, (uid_t
)-1, (gid_t
)-1, (gid_t
)-1,
120 (char *)NULL
, (char *)NULL
, (char *)NULL
123 /* The current host's name. */
124 char *current_host_name
= (char *)NULL
;
126 /* Non-zero means that this shell is a login shell.
129 1 = login shell from getty (or equivalent fake out)
130 -1 = login shell from "--login" (or -l) flag.
131 -2 = both from getty, and from flag.
135 /* Non-zero means that at this moment, the shell is interactive. In
136 general, this means that the shell is at this moment reading input
137 from the keyboard. */
140 /* Non-zero means that the shell was started as an interactive shell. */
141 int interactive_shell
= 0;
143 /* Non-zero means to send a SIGHUP to all jobs when an interactive login
147 /* Non-zero means to list status of running and stopped jobs at shell exit */
148 int check_jobs_at_exit
= 0;
150 /* Non-zero means to change to a directory name supplied as a command name */
153 /* Tells what state the shell was in when it started:
154 0 = non-interactive shell script
157 3 = wordexp evaluation
158 This is a superset of the information provided by interactive_shell.
160 int startup_state
= 0;
162 /* Special debugging helper. */
163 int debugging_login_shell
= 0;
165 /* The environment that the shell passes to other commands. */
166 char **shell_environment
;
168 /* Non-zero when we are executing a top-level command. */
171 /* The number of commands executed so far. */
172 int current_command_number
= 1;
174 /* Non-zero is the recursion depth for commands. */
175 int indirection_level
= 0;
177 /* The name of this shell, as taken from argv[0]. */
178 char *shell_name
= (char *)NULL
;
180 /* time in seconds when the shell was started */
181 time_t shell_start_time
;
183 /* Are we running in an emacs shell window? */
184 int running_under_emacs
;
186 /* Do we have /dev/fd? */
188 int have_devfd
= HAVE_DEV_FD
;
193 /* The name of the .(shell)rc file. */
194 static char *bashrc_file
= "~/.bashrc";
196 /* Non-zero means to act more like the Bourne shell on startup. */
197 static int act_like_sh
;
199 /* Non-zero if this shell is being run by `su'. */
202 /* Non-zero if we have already expanded and sourced $ENV. */
203 static int sourced_env
;
205 /* Is this shell running setuid? */
206 static int running_setuid
;
208 /* Values for the long-winded argument names. */
209 static int debugging
; /* Do debugging things. */
210 static int no_rc
; /* Don't execute ~/.bashrc */
211 static int no_profile
; /* Don't execute .profile */
212 static int do_version
; /* Display interesting version info. */
213 static int make_login_shell
; /* Make this shell be a `-bash' shell. */
214 static int want_initial_help
; /* --help option */
216 int debugging_mode
= 0; /* In debugging mode with --debugger */
217 int no_line_editing
= 0; /* Don't do fancy line editing. */
218 int dump_translatable_strings
; /* Dump strings in $"...", don't execute. */
219 int dump_po_strings
; /* Dump strings in $"..." in po format */
220 int wordexp_only
= 0; /* Do word expansion only */
221 int protected_mode
= 0; /* No command substitution with --wordexp */
223 #if defined (STRICT_POSIX)
224 int posixly_correct
= 1; /* Non-zero means posix.2 superset. */
226 int posixly_correct
= 0; /* Non-zero means posix.2 superset. */
230 /* Some long-winded argument names. These are obviously new. */
233 static const struct {
239 { "debug", Int
, &debugging
, (char **)0x0 },
240 #if defined (DEBUGGER)
241 { "debugger", Int
, &debugging_mode
, (char **)0x0 },
243 { "dump-po-strings", Int
, &dump_po_strings
, (char **)0x0 },
244 { "dump-strings", Int
, &dump_translatable_strings
, (char **)0x0 },
245 { "help", Int
, &want_initial_help
, (char **)0x0 },
246 { "init-file", Charp
, (int *)0x0, &bashrc_file
},
247 { "login", Int
, &make_login_shell
, (char **)0x0 },
248 { "noediting", Int
, &no_line_editing
, (char **)0x0 },
249 { "noprofile", Int
, &no_profile
, (char **)0x0 },
250 { "norc", Int
, &no_rc
, (char **)0x0 },
251 { "posix", Int
, &posixly_correct
, (char **)0x0 },
252 { "protected", Int
, &protected_mode
, (char **)0x0 },
253 { "rcfile", Charp
, (int *)0x0, &bashrc_file
},
254 #if defined (RESTRICTED_SHELL)
255 { "restricted", Int
, &restricted
, (char **)0x0 },
257 { "verbose", Int
, &echo_input_at_read
, (char **)0x0 },
258 { "version", Int
, &do_version
, (char **)0x0 },
259 { "wordexp", Int
, &wordexp_only
, (char **)0x0 },
260 { (char *)0x0, Int
, (int *)0x0, (char **)0x0 }
263 /* These are extern so execute_simple_command can set them, and then
264 longjmp back to main to execute a shell script, instead of calling
265 main () again and resulting in indefinite, possibly fatal, stack
267 procenv_t subshell_top_level
;
269 char **subshell_argv
;
270 char **subshell_envp
;
272 #if defined (BUFFERED_INPUT)
273 /* The file descriptor from which the shell is reading input. */
274 int default_buffered_input
= -1;
277 /* The following two variables are not static so they can show up in $-. */
278 int read_from_stdin
; /* -s flag supplied */
279 int want_pending_command
; /* -c flag supplied */
281 /* This variable is not static so it can be bound to $BASH_EXECUTION_STRING */
282 char *command_execution_string
; /* argument to -c option */
284 int malloc_trace_at_exit
= 0;
286 static int shell_reinitialized
= 0;
288 static FILE *default_input
;
290 static STRING_INT_ALIST
*shopt_alist
;
291 static int shopt_ind
= 0, shopt_len
= 0;
293 static int parse_long_options
__P((char **, int, int));
294 static int parse_shell_options
__P((char **, int, int));
295 static int bind_args
__P((char **, int, int, int));
297 static void start_debugger
__P((void));
299 static void add_shopt_to_alist
__P((char *, int));
300 static void run_shopt_alist
__P((void));
302 static void execute_env_file
__P((char *));
303 static void run_startup_files
__P((void));
304 static int open_shell_script
__P((char *));
305 static void set_bash_input
__P((void));
306 static int run_one_command
__P((char *));
307 static int run_wordexp
__P((char *));
309 static int uidget
__P((void));
311 static void init_interactive
__P((void));
312 static void init_noninteractive
__P((void));
313 static void init_interactive_script
__P((void));
315 static void set_shell_name
__P((char *));
316 static void shell_initialize
__P((void));
317 static void shell_reinitialize
__P((void));
319 static void show_shell_usage
__P((FILE *, int));
323 _cygwin32_check_tmp ()
327 if (stat ("/tmp", &sb
) < 0)
328 internal_warning (_("could not find /tmp, please create!"));
331 if (S_ISDIR (sb
.st_mode
) == 0)
332 internal_warning (_("/tmp must be a valid directory name"));
335 #endif /* __CYGWIN__ */
337 #if defined (NO_MAIN_ENV_ARG)
338 /* systems without third argument to main() */
343 #else /* !NO_MAIN_ENV_ARG */
345 main (argc
, argv
, env
)
348 #endif /* !NO_MAIN_ENV_ARG */
351 int code
, old_errexit_flag
;
352 #if defined (RESTRICTED_SHELL)
355 volatile int locally_skip_execution
;
356 volatile int arg_index
, top_level_arg_index
;
361 #endif /* __OPENNT */
367 USE_VAR(old_errexit_flag
);
368 #if defined (RESTRICTED_SHELL)
372 /* Catch early SIGINTs. */
373 code
= setjmp (top_level
);
379 #if defined (USING_BASH_MALLOC) && defined (DEBUG) && !defined (DISABLE_MALLOC_WRAPPERS)
381 malloc_set_register (1);
388 _cygwin32_check_tmp ();
389 #endif /* __CYGWIN__ */
391 /* Wait forever if we are debugging a login shell. */
392 while (debugging_login_shell
) sleep (3);
394 set_default_locale ();
396 running_setuid
= uidget ();
398 if (getenv ("POSIXLY_CORRECT") || getenv ("POSIX_PEDANTIC"))
401 #if defined (USE_GNU_MALLOC_LIBRARY)
402 mcheck (programming_error
, (void (*) ())0);
403 #endif /* USE_GNU_MALLOC_LIBRARY */
405 if (setjmp (subshell_top_level
))
407 argc
= subshell_argc
;
408 argv
= subshell_argv
;
413 shell_reinitialized
= 0;
415 /* Initialize `local' variables for all `invocations' of main (). */
417 if (arg_index
> argc
)
419 command_execution_string
= (char *)NULL
;
420 want_pending_command
= locally_skip_execution
= read_from_stdin
= 0;
421 default_input
= stdin
;
422 #if defined (BUFFERED_INPUT)
423 default_buffered_input
= -1;
426 /* Fix for the `infinite process creation' bug when running shell scripts
427 from startup files on System V. */
428 login_shell
= make_login_shell
= 0;
430 /* If this shell has already been run, then reinitialize it to a
432 if (shell_initialized
|| shell_name
)
434 /* Make sure that we do not infinitely recurse as a login shell. */
435 if (*shell_name
== '-')
438 shell_reinitialize ();
439 if (setjmp (top_level
))
443 shell_environment
= env
;
444 set_shell_name (argv
[0]);
445 shell_start_time
= NOW
; /* NOW now defined in general.h */
447 /* Parse argument flags from the input line. */
449 /* Find full word arguments first. */
450 arg_index
= parse_long_options (argv
, arg_index
, argc
);
452 if (want_initial_help
)
454 show_shell_usage (stdout
, 1);
455 exit (EXECUTION_SUCCESS
);
460 show_shell_version (1);
461 exit (EXECUTION_SUCCESS
);
464 /* All done with full word options; do standard shell option parsing.*/
465 this_command_name
= shell_name
; /* for error reporting */
466 arg_index
= parse_shell_options (argv
, arg_index
, argc
);
468 /* If user supplied the "--login" (or -l) flag, then set and invert
470 if (make_login_shell
)
473 login_shell
= -login_shell
;
476 set_login_shell (login_shell
!= 0);
479 dump_translatable_strings
= 1;
481 if (dump_translatable_strings
)
482 read_but_dont_execute
= 1;
484 if (running_setuid
&& privileged_mode
== 0)
485 disable_priv_mode ();
487 /* Need to get the argument to a -c option processed in the
488 above loop. The next arg is a command to execute, and the
489 following args are $0...$n respectively. */
490 if (want_pending_command
)
492 command_execution_string
= argv
[arg_index
];
493 if (command_execution_string
== 0)
495 report_error (_("%s: option requires an argument"), "-c");
500 this_command_name
= (char *)NULL
;
502 cmd_init(); /* initialize the command object caches */
504 /* First, let the outside world know about our interactive status.
505 A shell is interactive if the `-i' flag was given, or if all of
506 the following conditions are met:
508 no arguments remaining or the -s flag given
509 standard input is a terminal
510 standard error is a terminal
511 Refer to Posix.2, the description of the `sh' utility. */
513 if (forced_interactive
|| /* -i flag */
514 (!command_execution_string
&& /* No -c command and ... */
515 wordexp_only
== 0 && /* No --wordexp and ... */
516 ((arg_index
== argc
) || /* no remaining args or... */
517 read_from_stdin
) && /* -s flag with args, and */
518 isatty (fileno (stdin
)) && /* Input is a terminal and */
519 isatty (fileno (stderr
)))) /* error output is a terminal. */
522 init_noninteractive ();
524 #define CLOSE_FDS_AT_LOGIN
525 #if defined (CLOSE_FDS_AT_LOGIN)
527 * Some systems have the bad habit of starting login shells with lots of open
528 * file descriptors. For instance, most systems that have picked up the
529 * pre-4.0 Sun YP code leave a file descriptor open each time you call one
530 * of the getpw* functions, and it's set to be open across execs. That
531 * means one for login, one for xterm, one for shelltool, etc.
533 if (login_shell
&& interactive_shell
)
535 for (i
= 3; i
< 20; i
++)
538 #endif /* CLOSE_FDS_AT_LOGIN */
540 /* If we're in a strict Posix.2 mode, turn on interactive comments,
541 alias expansion in non-interactive shells, and other Posix.2 things. */
544 bind_variable ("POSIXLY_CORRECT", "y", 0);
545 sv_strict_posix ("POSIXLY_CORRECT");
548 /* Now we run the shopt_alist and process the options. */
552 /* From here on in, the shell must be a normal functioning shell.
553 Variables from the environment are expected to be set, etc. */
557 set_default_locale_vars ();
560 * M-x term -> TERM=eterm EMACS=22.1 (term:0.96) (eterm)
561 * M-x shell -> TERM=dumb EMACS=t (no line editing)
562 * M-x terminal -> TERM=emacs-em7955 EMACS= (line editing)
564 if (interactive_shell
)
568 term
= get_string_value ("TERM");
569 emacs
= get_string_value ("EMACS");
571 /* Not sure any emacs terminal emulator sets TERM=emacs any more */
572 no_line_editing
|= term
&& (STREQ (term
, "emacs"));
573 no_line_editing
|= emacs
&& emacs
[0] == 't' && emacs
[1] == '\0' && STREQ (term
, "dumb");
575 /* running_under_emacs == 2 for `eterm' */
576 running_under_emacs
= (emacs
!= 0) || (term
&& STREQN (term
, "emacs", 5));
577 running_under_emacs
+= term
&& STREQN (term
, "eterm", 5) && emacs
&& strstr (emacs
, "term");
579 if (running_under_emacs
)
580 gnu_error_format
= 1;
583 top_level_arg_index
= arg_index
;
584 old_errexit_flag
= exit_immediately_on_error
;
586 /* Give this shell a place to longjmp to before executing the
587 startup files. This allows users to press C-c to abort the
589 code
= setjmp (top_level
);
592 if (code
== EXITPROG
|| code
== ERREXIT
)
593 exit_shell (last_command_exit_value
);
596 #if defined (JOB_CONTROL)
597 /* Reset job control, since run_startup_files turned it off. */
598 set_job_control (interactive_shell
);
600 /* Reset value of `set -e', since it's turned off before running
601 the startup files. */
602 exit_immediately_on_error
+= old_errexit_flag
;
603 locally_skip_execution
++;
607 arg_index
= top_level_arg_index
;
609 /* Execute the start-up scripts. */
611 if (interactive_shell
== 0)
613 unbind_variable ("PS1");
614 unbind_variable ("PS2");
617 /* This has already been done by init_noninteractive */
618 expand_aliases
= posixly_correct
;
623 change_flag ('i', FLAG_ON
);
627 #if defined (RESTRICTED_SHELL)
628 /* Set restricted_shell based on whether the basename of $0 indicates that
629 the shell should be restricted or if the `-r' option was supplied at
631 restricted_shell
= shell_is_restricted (shell_name
);
633 /* If the `-r' option is supplied at invocation, make sure that the shell
634 is not in restricted mode when running the startup files. */
635 saverst
= restricted
;
639 /* The startup files are run with `set -e' temporarily disabled. */
640 if (locally_skip_execution
== 0 && running_setuid
== 0)
642 old_errexit_flag
= exit_immediately_on_error
;
643 exit_immediately_on_error
= 0;
645 run_startup_files ();
646 exit_immediately_on_error
+= old_errexit_flag
;
649 /* If we are invoked as `sh', turn on Posix mode. */
652 bind_variable ("POSIXLY_CORRECT", "y", 0);
653 sv_strict_posix ("POSIXLY_CORRECT");
656 #if defined (RESTRICTED_SHELL)
657 /* Turn on the restrictions after executing the startup files. This
658 means that `bash -r' or `set -r' invoked from a startup file will
659 turn on the restrictions after the startup files are executed. */
660 restricted
= saverst
|| restricted
;
661 if (shell_reinitialized
== 0)
662 maybe_make_restricted (shell_name
);
663 #endif /* RESTRICTED_SHELL */
668 last_command_exit_value
= run_wordexp (argv
[arg_index
]);
669 exit_shell (last_command_exit_value
);
672 if (command_execution_string
)
674 arg_index
= bind_args (argv
, arg_index
, argc
, 0);
680 #if defined (ONESHOT)
682 run_one_command (command_execution_string
);
683 exit_shell (last_command_exit_value
);
685 with_input_from_string (command_execution_string
, "-c");
686 goto read_and_execute
;
687 #endif /* !ONESHOT */
690 /* Get possible input filename and set up default_buffered_input or
691 default_input as appropriate. */
692 if (arg_index
!= argc
&& read_from_stdin
== 0)
694 open_shell_script (argv
[arg_index
]);
697 else if (interactive
== 0)
698 /* In this mode, bash is reading a script from stdin, which is a
699 pipe or redirected file. */
700 #if defined (BUFFERED_INPUT)
701 default_buffered_input
= fileno (stdin
); /* == 0 */
703 setbuf (default_input
, (char *)NULL
);
704 #endif /* !BUFFERED_INPUT */
708 /* Bind remaining args to $1 ... $n */
709 arg_index
= bind_args (argv
, arg_index
, argc
, 1);
711 if (debugging_mode
&& locally_skip_execution
== 0 && running_setuid
== 0)
714 /* Do the things that should be done only for interactive shells. */
715 if (interactive_shell
)
717 /* Set up for checking for presence of mail. */
721 #if defined (HISTORY)
722 /* Initialize the interactive history stuff. */
723 bash_initialize_history ();
724 /* Don't load the history from the history file if we've already
725 saved some lines in this session (e.g., by putting `history -s xx'
726 into one of the startup files). */
727 if (shell_initialized
== 0 && history_lines_this_session
== 0)
731 /* Initialize terminal state for interactive shells after the
732 .bash_profile and .bashrc are interpreted. */
736 #if !defined (ONESHOT)
738 #endif /* !ONESHOT */
740 shell_initialized
= 1;
742 /* Read commands until exit condition. */
744 exit_shell (last_command_exit_value
);
748 parse_long_options (argv
, arg_start
, arg_end
)
750 int arg_start
, arg_end
;
752 int arg_index
, longarg
, i
;
755 arg_index
= arg_start
;
756 while ((arg_index
!= arg_end
) && (arg_string
= argv
[arg_index
]) &&
757 (*arg_string
== '-'))
761 /* Make --login equivalent to -login. */
762 if (arg_string
[1] == '-' && arg_string
[2])
768 for (i
= 0; long_args
[i
].name
; i
++)
770 if (STREQ (arg_string
+ 1, long_args
[i
].name
))
772 if (long_args
[i
].type
== Int
)
773 *long_args
[i
].int_value
= 1;
774 else if (argv
[++arg_index
] == 0)
776 report_error (_("%s: option requires an argument"), long_args
[i
].name
);
780 *long_args
[i
].char_value
= argv
[arg_index
];
785 if (long_args
[i
].name
== 0)
789 report_error (_("%s: invalid option"), argv
[arg_index
]);
790 show_shell_usage (stderr
, 0);
793 break; /* No such argument. Maybe flag arg. */
803 parse_shell_options (argv
, arg_start
, arg_end
)
805 int arg_start
, arg_end
;
808 int arg_character
, on_or_off
, next_arg
, i
;
809 char *o_option
, *arg_string
;
811 arg_index
= arg_start
;
812 while (arg_index
!= arg_end
&& (arg_string
= argv
[arg_index
]) &&
813 (*arg_string
== '-' || *arg_string
== '+'))
815 /* There are flag arguments, so parse them. */
816 next_arg
= arg_index
+ 1;
818 /* A single `-' signals the end of options. From the 4.3 BSD sh.
819 An option `--' means the same thing; this is the standard
820 getopt(3) meaning. */
821 if (arg_string
[0] == '-' &&
822 (arg_string
[1] == '\0' ||
823 (arg_string
[1] == '-' && arg_string
[2] == '\0')))
827 on_or_off
= arg_string
[0];
828 while (arg_character
= arg_string
[i
++])
830 switch (arg_character
)
833 want_pending_command
= 1;
837 make_login_shell
= 1;
845 o_option
= argv
[next_arg
];
848 list_minus_o_opts (-1, (on_or_off
== '-') ? 0 : 1);
851 if (set_minus_o_option (on_or_off
, o_option
) != EXECUTION_SUCCESS
)
857 /* Since some of these can be overridden by the normal
858 interactive/non-interactive shell initialization or
859 initializing posix mode, we save the options and process
860 them after initialization. */
861 o_option
= argv
[next_arg
];
864 shopt_listopt (o_option
, (on_or_off
== '-') ? 0 : 1);
867 add_shopt_to_alist (o_option
, on_or_off
);
872 dump_translatable_strings
= 1;
876 if (change_flag (arg_character
, on_or_off
) == FLAG_ERROR
)
878 report_error (_("%c%c: invalid option"), on_or_off
, arg_character
);
879 show_shell_usage (stderr
, 0);
884 /* Can't do just a simple increment anymore -- what about
885 "bash -abouo emacs ignoreeof -hP"? */
886 arg_index
= next_arg
;
892 /* Exit the shell with status S. */
897 fflush (stdout
); /* XXX */
900 /* Do trap[0] if defined. Allow it to override the exit status
902 if (signal_is_trapped (0))
903 s
= run_exit_trap ();
905 #if defined (PROCESS_SUBSTITUTION)
907 #endif /* PROCESS_SUBSTITUTION */
909 #if defined (HISTORY)
910 if (interactive_shell
)
911 maybe_save_shell_history ();
914 #if defined (COPROCESS_SUPPORT)
918 #if defined (JOB_CONTROL)
919 /* If the user has run `shopt -s huponexit', hangup all jobs when we exit
920 an interactive login shell. ksh does this unconditionally. */
921 if (interactive_shell
&& login_shell
&& hup_on_exit
)
924 /* If this shell is interactive, terminate all stopped jobs and
925 restore the original terminal process group. Don't do this if we're
926 in a subshell and calling exit_shell after, for example, a failed
928 if (subshell_environment
== 0)
930 #endif /* JOB_CONTROL */
932 /* Always return the exit status of the last command to our parent. */
936 /* A wrapper for exit that (optionally) can do other things, like malloc
937 statistics tracing. */
942 #if defined (MALLOC_DEBUG) && defined (USING_BASH_MALLOC)
943 if (malloc_trace_at_exit
)
944 trace_malloc_stats (get_name_for_error (), (char *)NULL
);
950 /* Source the bash startup files. If POSIXLY_CORRECT is non-zero, we obey
951 the Posix.2 startup file rules: $ENV is expanded, and if the file it
952 names exists, that file is sourced. The Posix.2 rules are in effect
953 for interactive shells only. (section 4.56.5.3) */
955 /* Execute ~/.bashrc for most shells. Never execute it if
956 ACT_LIKE_SH is set, or if NO_RC is set.
958 If the executable file "/usr/gnu/src/bash/foo" contains:
965 COMMAND EXECUTE BASHRC
966 --------------------------------
970 rsh machine ls YES (for rsh, which calls `bash -c')
971 rsh machine foo YES (for shell started by rsh) NO (for foo!)
978 execute_env_file (env_file
)
983 if (env_file
&& *env_file
)
985 fn
= expand_string_unsplit_to_string (env_file
, Q_DOUBLE_QUOTES
);
987 maybe_execute_file (fn
, 1);
995 #if defined (JOB_CONTROL)
998 int sourced_login
, run_by_ssh
;
1000 /* get the rshd/sshd case out of the way first. */
1001 if (interactive_shell
== 0 && no_rc
== 0 && login_shell
== 0 &&
1002 act_like_sh
== 0 && command_execution_string
)
1004 #ifdef SSH_SOURCE_BASHRC
1005 run_by_ssh
= (find_variable ("SSH_CLIENT") != (SHELL_VAR
*)0) ||
1006 (find_variable ("SSH2_CLIENT") != (SHELL_VAR
*)0);
1011 /* If we were run by sshd or we think we were run by rshd, execute
1012 ~/.bashrc if we are a top-level shell. */
1013 if ((run_by_ssh
|| isnetconn (fileno (stdin
))) && shell_level
< 2)
1016 # if defined (__OPENNT)
1017 maybe_execute_file (_prefixInstallPath(SYS_BASHRC
, NULL
, 0), 1);
1019 maybe_execute_file (SYS_BASHRC
, 1);
1022 maybe_execute_file (bashrc_file
, 1);
1027 #if defined (JOB_CONTROL)
1028 /* Startup files should be run without job control enabled. */
1029 old_job_control
= interactive_shell
? set_job_control (0) : 0;
1034 /* A shell begun with the --login (or -l) flag that is not in posix mode
1035 runs the login shell startup files, no matter whether or not it is
1036 interactive. If NON_INTERACTIVE_LOGIN_SHELLS is defined, run the
1037 startup files if argv[0][0] == '-' as well. */
1038 #if defined (NON_INTERACTIVE_LOGIN_SHELLS)
1039 if (login_shell
&& posixly_correct
== 0)
1041 if (login_shell
< 0 && posixly_correct
== 0)
1044 /* We don't execute .bashrc for login shells. */
1047 /* Execute /etc/profile and one of the personal login shell
1048 initialization files. */
1049 if (no_profile
== 0)
1051 maybe_execute_file (SYS_PROFILE
, 1);
1053 if (act_like_sh
) /* sh */
1054 maybe_execute_file ("~/.profile", 1);
1055 else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) &&
1056 (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */
1057 maybe_execute_file ("~/.profile", 1);
1063 /* A non-interactive shell not named `sh' and not in posix mode reads and
1064 executes commands from $BASH_ENV. If `su' starts a shell with `-c cmd'
1065 and `-su' as the name of the shell, we want to read the startup files.
1066 No other non-interactive shells read any startup files. */
1067 if (interactive_shell
== 0 && !(su_shell
&& login_shell
))
1069 if (posixly_correct
== 0 && act_like_sh
== 0 && privileged_mode
== 0 &&
1071 execute_env_file (get_string_value ("BASH_ENV"));
1075 /* Interactive shell or `-su' shell. */
1076 if (posixly_correct
== 0) /* bash, sh */
1078 if (login_shell
&& sourced_login
++ == 0)
1080 /* We don't execute .bashrc for login shells. */
1083 /* Execute /etc/profile and one of the personal login shell
1084 initialization files. */
1085 if (no_profile
== 0)
1087 maybe_execute_file (SYS_PROFILE
, 1);
1089 if (act_like_sh
) /* sh */
1090 maybe_execute_file ("~/.profile", 1);
1091 else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) &&
1092 (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */
1093 maybe_execute_file ("~/.profile", 1);
1098 if (act_like_sh
== 0 && no_rc
== 0)
1101 # if defined (__OPENNT)
1102 maybe_execute_file (_prefixInstallPath(SYS_BASHRC
, NULL
, 0), 1);
1104 maybe_execute_file (SYS_BASHRC
, 1);
1107 maybe_execute_file (bashrc_file
, 1);
1110 else if (act_like_sh
&& privileged_mode
== 0 && sourced_env
++ == 0)
1111 execute_env_file (get_string_value ("ENV"));
1113 else /* bash --posix, sh --posix */
1116 if (interactive_shell
&& privileged_mode
== 0 && sourced_env
++ == 0)
1117 execute_env_file (get_string_value ("ENV"));
1120 #if defined (JOB_CONTROL)
1121 set_job_control (old_job_control
);
1125 #if defined (RESTRICTED_SHELL)
1126 /* Return 1 if the shell should be a restricted one based on NAME or the
1127 value of `restricted'. Don't actually do anything, just return a
1130 shell_is_restricted (name
)
1137 temp
= base_pathname (name
);
1140 return (STREQ (temp
, RESTRICTED_SHELL_NAME
));
1143 /* Perhaps make this shell a `restricted' one, based on NAME. If the
1144 basename of NAME is "rbash", then this shell is restricted. The
1145 name of the restricted shell is a configurable option, see config.h.
1146 In a restricted shell, PATH, SHELL, ENV, and BASH_ENV are read-only
1148 Do this also if `restricted' is already set to 1; maybe the shell was
1151 maybe_make_restricted (name
)
1156 temp
= base_pathname (name
);
1159 if (restricted
|| (STREQ (temp
, RESTRICTED_SHELL_NAME
)))
1161 set_var_read_only ("PATH");
1162 set_var_read_only ("SHELL");
1163 set_var_read_only ("ENV");
1164 set_var_read_only ("BASH_ENV");
1167 return (restricted
);
1169 #endif /* RESTRICTED_SHELL */
1171 /* Fetch the current set of uids and gids and return 1 if we're running
1172 setuid or setgid. */
1179 if (current_user
.uid
!= u
)
1181 FREE (current_user
.user_name
);
1182 FREE (current_user
.shell
);
1183 FREE (current_user
.home_dir
);
1184 current_user
.user_name
= current_user
.shell
= current_user
.home_dir
= (char *)NULL
;
1186 current_user
.uid
= u
;
1187 current_user
.gid
= getgid ();
1188 current_user
.euid
= geteuid ();
1189 current_user
.egid
= getegid ();
1191 /* See whether or not we are running setuid or setgid. */
1192 return (current_user
.uid
!= current_user
.euid
) ||
1193 (current_user
.gid
!= current_user
.egid
);
1197 disable_priv_mode ()
1199 setuid (current_user
.uid
);
1200 setgid (current_user
.gid
);
1201 current_user
.euid
= current_user
.uid
;
1202 current_user
.egid
= current_user
.gid
;
1210 WORD_LIST
*wl
, *tl
, *result
;
1212 code
= setjmp (top_level
);
1214 if (code
!= NOT_JUMPED
)
1218 /* Some kind of throw to top_level has occured. */
1220 return last_command_exit_value
= 127;
1223 return last_command_exit_value
;
1225 return last_command_exit_value
= 1;
1227 command_error ("run_wordexp", CMDERR_BADJUMP
, code
, 0);
1231 /* Run it through the parser to get a list of words and expand them */
1232 if (words
&& *words
)
1234 with_input_from_string (words
, "--wordexp");
1235 if (parse_command () != 0)
1237 if (global_command
== 0)
1242 if (global_command
->type
!= cm_simple
)
1244 wl
= global_command
->value
.Simple
->words
;
1246 for (tl
= wl
; tl
; tl
= tl
->next
)
1247 tl
->word
->flags
|= W_NOCOMSUB
|W_NOPROCSUB
;
1248 result
= wl
? expand_words_no_vars (wl
) : (WORD_LIST
*)0;
1251 result
= (WORD_LIST
*)0;
1253 last_command_exit_value
= 0;
1261 /* Count up the number of words and bytes, and print them. Don't count
1262 the trailing NUL byte. */
1263 for (nw
= nb
= 0, wl
= result
; wl
; wl
= wl
->next
)
1266 nb
+= strlen (wl
->word
->word
);
1268 printf ("%u\n%u\n", nw
, nb
);
1269 /* Print each word on a separate line. This will have to be changed when
1270 the interface to glibc is completed. */
1271 for (wl
= result
; wl
; wl
= wl
->next
)
1272 printf ("%s\n", wl
->word
->word
);
1277 #if defined (ONESHOT)
1278 /* Run one command, given as the argument to the -c option. Tell
1279 parse_and_execute not to fork for a simple command. */
1281 run_one_command (command
)
1286 code
= setjmp (top_level
);
1288 if (code
!= NOT_JUMPED
)
1290 #if defined (PROCESS_SUBSTITUTION)
1291 unlink_fifo_list ();
1292 #endif /* PROCESS_SUBSTITUTION */
1295 /* Some kind of throw to top_level has occured. */
1297 return last_command_exit_value
= 127;
1300 return last_command_exit_value
;
1302 return last_command_exit_value
= 1;
1304 command_error ("run_one_command", CMDERR_BADJUMP
, code
, 0);
1307 return (parse_and_execute (savestring (command
), "-c", SEVAL_NOHIST
));
1309 #endif /* ONESHOT */
1312 bind_args (argv
, arg_start
, arg_end
, start_index
)
1314 int arg_start
, arg_end
, start_index
;
1319 for (i
= arg_start
, args
= (WORD_LIST
*)NULL
; i
< arg_end
; i
++)
1320 args
= make_word_list (make_word (argv
[i
]), args
);
1323 args
= REVERSE_LIST (args
, WORD_LIST
*);
1324 if (start_index
== 0) /* bind to $0...$n for sh -c command */
1326 /* Posix.2 4.56.3 says that the first argument after sh -c command
1327 becomes $0, and the rest of the arguments become $1...$n */
1328 shell_name
= savestring (args
->word
->word
);
1329 FREE (dollar_vars
[0]);
1330 dollar_vars
[0] = savestring (args
->word
->word
);
1331 remember_args (args
->next
, 1);
1332 push_args (args
->next
); /* BASH_ARGV and BASH_ARGC */
1334 else /* bind to $1...$n for shell script */
1336 remember_args (args
, 1);
1337 push_args (args
); /* BASH_ARGV and BASH_ARGC */
1340 dispose_words (args
);
1349 remember_args ((WORD_LIST
*)NULL
, 1);
1350 pop_args (); /* Reset BASH_ARGV and BASH_ARGC */
1356 #if defined (DEBUGGER) && defined (DEBUGGER_START_FILE)
1359 old_errexit
= exit_immediately_on_error
;
1360 exit_immediately_on_error
= 0;
1362 maybe_execute_file (DEBUGGER_START_FILE
, 1);
1363 function_trace_mode
= 1;
1365 exit_immediately_on_error
+= old_errexit
;
1370 open_shell_script (script_name
)
1373 int fd
, e
, fd_is_tty
;
1374 char *filename
, *path_filename
, *t
;
1378 #if defined (ARRAY_VARS)
1379 SHELL_VAR
*funcname_v
, *bash_source_v
, *bash_lineno_v
;
1380 ARRAY
*funcname_a
, *bash_source_a
, *bash_lineno_a
;
1383 filename
= savestring (script_name
);
1385 fd
= open (filename
, O_RDONLY
);
1386 if ((fd
< 0) && (errno
== ENOENT
) && (absolute_program (filename
) == 0))
1389 /* If it's not in the current directory, try looking through PATH
1391 path_filename
= find_path_file (script_name
);
1395 filename
= path_filename
;
1396 fd
= open (filename
, O_RDONLY
);
1405 file_error (filename
);
1406 exit ((e
== ENOENT
) ? EX_NOTFOUND
: EX_NOINPUT
);
1409 free (dollar_vars
[0]);
1410 dollar_vars
[0] = savestring (script_name
);
1412 #if defined (ARRAY_VARS)
1413 GET_ARRAY_FROM_VAR ("FUNCNAME", funcname_v
, funcname_a
);
1414 GET_ARRAY_FROM_VAR ("BASH_SOURCE", bash_source_v
, bash_source_a
);
1415 GET_ARRAY_FROM_VAR ("BASH_LINENO", bash_lineno_v
, bash_lineno_a
);
1417 array_push (bash_source_a
, filename
);
1420 t
= itos (executing_line_number ());
1421 array_push (bash_lineno_a
, t
);
1424 array_push (funcname_a
, "main");
1428 fd_is_tty
= isatty (fd
);
1433 /* Only do this with non-tty file descriptors we can seek on. */
1434 if (fd_is_tty
== 0 && (lseek (fd
, 0L, 1) != -1))
1436 /* Check to see if the `file' in `bash file' is a binary file
1437 according to the same tests done by execute_simple_command (),
1438 and report an error and exit if it is. */
1439 sample_len
= read (fd
, sample
, sizeof (sample
));
1443 if ((fstat (fd
, &sb
) == 0) && S_ISDIR (sb
.st_mode
))
1444 internal_error (_("%s: is a directory"), filename
);
1448 file_error (filename
);
1452 else if (sample_len
> 0 && (check_binary_file (sample
, sample_len
)))
1454 internal_error (_("%s: cannot execute binary file"), filename
);
1455 exit (EX_BINARY_FILE
);
1457 /* Now rewind the file back to the beginning. */
1461 /* Open the script. But try to move the file descriptor to a randomly
1462 large one, in the hopes that any descriptors used by the script will
1463 not match with ours. */
1464 fd
= move_to_high_fd (fd
, 1, -1);
1466 #if defined (__CYGWIN__) && defined (O_TEXT)
1467 setmode (fd
, O_TEXT
);
1470 #if defined (BUFFERED_INPUT)
1471 default_buffered_input
= fd
;
1472 SET_CLOSE_ON_EXEC (default_buffered_input
);
1473 #else /* !BUFFERED_INPUT */
1474 default_input
= fdopen (fd
, "r");
1476 if (default_input
== 0)
1478 file_error (filename
);
1482 SET_CLOSE_ON_EXEC (fd
);
1483 if (fileno (default_input
) != fd
)
1484 SET_CLOSE_ON_EXEC (fileno (default_input
));
1485 #endif /* !BUFFERED_INPUT */
1487 /* Just about the only way for this code to be executed is if something
1488 like `bash -i /dev/stdin' is executed. */
1489 if (interactive_shell
&& fd_is_tty
)
1494 #if defined (BUFFERED_INPUT)
1495 default_buffered_input
= 0;
1497 fclose (default_input
);
1498 default_input
= stdin
;
1501 else if (forced_interactive
&& fd_is_tty
== 0)
1502 /* But if a script is called with something like `bash -i scriptname',
1503 we need to do a non-interactive setup here, since we didn't do it
1505 init_interactive_script ();
1511 /* Initialize the input routines for the parser. */
1515 /* Make sure the fd from which we are reading input is not in
1517 #if defined (BUFFERED_INPUT)
1518 if (interactive
== 0)
1519 sh_unset_nodelay_mode (default_buffered_input
);
1521 #endif /* !BUFFERED_INPUT */
1522 sh_unset_nodelay_mode (fileno (stdin
));
1524 /* with_input_from_stdin really means `with_input_from_readline' */
1525 if (interactive
&& no_line_editing
== 0)
1526 with_input_from_stdin ();
1527 #if defined (BUFFERED_INPUT)
1528 else if (interactive
== 0)
1529 with_input_from_buffered_stream (default_buffered_input
, dollar_vars
[0]);
1530 #endif /* BUFFERED_INPUT */
1532 with_input_from_stream (default_input
, dollar_vars
[0]);
1535 /* Close the current shell script input source and forget about it. This is
1536 extern so execute_cmd.c:initialize_subshell() can call it. If CHECK_ZERO
1537 is non-zero, we close default_buffered_input even if it's the standard
1540 unset_bash_input (check_zero
)
1543 #if defined (BUFFERED_INPUT)
1544 if ((check_zero
&& default_buffered_input
>= 0) ||
1545 (check_zero
== 0 && default_buffered_input
> 0))
1547 close_buffered_fd (default_buffered_input
);
1548 default_buffered_input
= bash_input
.location
.buffered_fd
= -1;
1549 bash_input
.type
= st_none
; /* XXX */
1551 #else /* !BUFFERED_INPUT */
1554 fclose (default_input
);
1555 default_input
= (FILE *)NULL
;
1557 #endif /* !BUFFERED_INPUT */
1561 #if !defined (PROGRAM)
1562 # define PROGRAM "bash"
1566 set_shell_name (argv0
)
1569 /* Here's a hack. If the name of this shell is "sh", then don't do
1570 any startup files; just try to be more like /bin/sh. */
1571 shell_name
= argv0
? base_pathname (argv0
) : PROGRAM
;
1573 if (argv0
&& *argv0
== '-')
1575 if (*shell_name
== '-')
1580 if (shell_name
[0] == 's' && shell_name
[1] == 'h' && shell_name
[2] == '\0')
1582 if (shell_name
[0] == 's' && shell_name
[1] == 'u' && shell_name
[2] == '\0')
1585 shell_name
= argv0
? argv0
: PROGRAM
;
1586 FREE (dollar_vars
[0]);
1587 dollar_vars
[0] = savestring (shell_name
);
1589 /* A program may start an interactive shell with
1590 "execl ("/bin/bash", "-", NULL)".
1591 If so, default the name of this shell to our name. */
1592 if (!shell_name
|| !*shell_name
|| (shell_name
[0] == '-' && !shell_name
[1]))
1593 shell_name
= PROGRAM
;
1599 expand_aliases
= interactive_shell
= startup_state
= 1;
1604 init_noninteractive ()
1606 #if defined (HISTORY)
1607 bash_history_reinit (0);
1608 #endif /* HISTORY */
1609 interactive_shell
= startup_state
= interactive
= 0;
1610 expand_aliases
= posixly_correct
; /* XXX - was 0 not posixly_correct */
1611 no_line_editing
= 1;
1612 #if defined (JOB_CONTROL)
1613 set_job_control (0);
1614 #endif /* JOB_CONTROL */
1618 init_interactive_script ()
1620 init_noninteractive ();
1621 expand_aliases
= interactive_shell
= startup_state
= 1;
1625 get_current_user_info ()
1627 struct passwd
*entry
;
1629 /* Don't fetch this more than once. */
1630 if (current_user
.user_name
== 0)
1632 entry
= getpwuid (current_user
.uid
);
1635 current_user
.user_name
= savestring (entry
->pw_name
);
1636 current_user
.shell
= (entry
->pw_shell
&& entry
->pw_shell
[0])
1637 ? savestring (entry
->pw_shell
)
1638 : savestring ("/bin/sh");
1639 current_user
.home_dir
= savestring (entry
->pw_dir
);
1643 current_user
.user_name
= _("I have no name!");
1644 current_user
.user_name
= savestring (current_user
.user_name
);
1645 current_user
.shell
= savestring ("/bin/sh");
1646 current_user
.home_dir
= savestring ("/");
1652 /* Do whatever is necessary to initialize the shell.
1653 Put new initializations in here. */
1659 /* Line buffer output for stderr and stdout. */
1660 if (shell_initialized
== 0)
1662 sh_setlinebuf (stderr
);
1663 sh_setlinebuf (stdout
);
1666 /* Sort the array of shell builtins so that the binary search in
1667 find_shell_builtin () works correctly. */
1668 initialize_shell_builtins ();
1670 /* Initialize the trap signal handlers before installing our own
1671 signal handlers. traps.c:restore_original_signals () is responsible
1672 for restoring the original default signal handlers. That function
1673 is called when we make a new child. */
1674 initialize_traps ();
1675 initialize_signals (0);
1677 /* It's highly unlikely that this will change. */
1678 if (current_host_name
== 0)
1680 /* Initialize current_host_name. */
1681 if (gethostname (hostname
, 255) < 0)
1682 current_host_name
= "??host??";
1684 current_host_name
= savestring (hostname
);
1687 /* Initialize the stuff in current_user that comes from the password
1688 file. We don't need to do this right away if the shell is not
1690 if (interactive_shell
)
1691 get_current_user_info ();
1693 /* Initialize our interface to the tilde expander. */
1694 tilde_initialize ();
1696 /* Initialize internal and environment variables. Don't import shell
1697 functions from the environment if we are running in privileged or
1698 restricted mode or if the shell is running setuid. */
1699 #if defined (RESTRICTED_SHELL)
1700 initialize_shell_variables (shell_environment
, privileged_mode
||restricted
||running_setuid
);
1702 initialize_shell_variables (shell_environment
, privileged_mode
||running_setuid
);
1705 /* Initialize the data structures for storing and running jobs. */
1706 initialize_job_control (0);
1708 /* Initialize input streams to null. */
1709 initialize_bash_input ();
1711 initialize_flags ();
1713 /* Initialize the shell options. Don't import the shell options
1714 from the environment variable $SHELLOPTS if we are running in
1715 privileged or restricted mode or if the shell is running setuid. */
1716 #if defined (RESTRICTED_SHELL)
1717 initialize_shell_options (privileged_mode
||restricted
||running_setuid
);
1718 initialize_bashopts (privileged_mode
||restricted
||running_setuid
);
1720 initialize_shell_options (privileged_mode
||running_setuid
);
1721 initialize_bashopts (privileged_mode
||running_setuid
);
1725 /* Function called by main () when it appears that the shell has already
1726 had some initialization performed. This is supposed to reset the world
1727 back to a pristine state, as if we had been exec'ed. */
1729 shell_reinitialize ()
1731 /* The default shell prompts. */
1732 primary_prompt
= PPROMPT
;
1733 secondary_prompt
= SPROMPT
;
1735 /* Things that get 1. */
1736 current_command_number
= 1;
1738 /* We have decided that the ~/.bashrc file should not be executed
1739 for the invocation of each shell script. If the variable $ENV
1740 (or $BASH_ENV) is set, its value is used as the name of a file
1742 no_rc
= no_profile
= 1;
1744 /* Things that get 0. */
1745 login_shell
= make_login_shell
= interactive
= executing
= 0;
1746 debugging
= do_version
= line_number
= last_command_exit_value
= 0;
1747 forced_interactive
= interactive_shell
= subshell_environment
= 0;
1750 #if defined (HISTORY)
1751 bash_history_reinit (0);
1752 #endif /* HISTORY */
1754 #if defined (RESTRICTED_SHELL)
1756 #endif /* RESTRICTED_SHELL */
1758 /* Ensure that the default startup file is used. (Except that we don't
1759 execute this file for reinitialized shells). */
1760 bashrc_file
= "~/.bashrc";
1762 /* Delete all variables and functions. They will be reinitialized when
1763 the environment is parsed. */
1764 delete_all_contexts (shell_variables
);
1765 delete_all_variables (shell_functions
);
1767 reinit_special_variables ();
1769 #if defined (READLINE)
1770 bashline_reinitialize ();
1773 shell_reinitialized
= 1;
1777 show_shell_usage (fp
, extra
)
1782 char *set_opts
, *s
, *t
;
1785 fprintf (fp
, _("GNU bash, version %s-(%s)\n"), shell_version_string (), MACHTYPE
);
1786 fprintf (fp
, _("Usage:\t%s [GNU long option] [option] ...\n\t%s [GNU long option] [option] script-file ...\n"),
1787 shell_name
, shell_name
);
1788 fputs (_("GNU long options:\n"), fp
);
1789 for (i
= 0; long_args
[i
].name
; i
++)
1790 fprintf (fp
, "\t--%s\n", long_args
[i
].name
);
1792 fputs (_("Shell options:\n"), fp
);
1793 fputs (_("\t-irsD or -c command or -O shopt_option\t\t(invocation only)\n"), fp
);
1795 for (i
= 0, set_opts
= 0; shell_builtins
[i
].name
; i
++)
1796 if (STREQ (shell_builtins
[i
].name
, "set"))
1797 set_opts
= savestring (shell_builtins
[i
].short_doc
);
1800 s
= strchr (set_opts
, '[');
1805 t
= strchr (s
, ']');
1808 fprintf (fp
, _("\t-%s or -o option\n"), s
);
1814 fprintf (fp
, _("Type `%s -c \"help set\"' for more information about shell options.\n"), shell_name
);
1815 fprintf (fp
, _("Type `%s -c help' for more information about shell builtin commands.\n"), shell_name
);
1816 fprintf (fp
, _("Use the `bashbug' command to report bugs.\n"));
1821 add_shopt_to_alist (opt
, on_or_off
)
1825 if (shopt_ind
>= shopt_len
)
1828 shopt_alist
= (STRING_INT_ALIST
*)xrealloc (shopt_alist
, shopt_len
* sizeof (shopt_alist
[0]));
1830 shopt_alist
[shopt_ind
].word
= opt
;
1831 shopt_alist
[shopt_ind
].token
= on_or_off
;
1840 for (i
= 0; i
< shopt_ind
; i
++)
1841 if (shopt_setopt (shopt_alist
[i
].word
, (shopt_alist
[i
].token
== '-')) != EXECUTION_SUCCESS
)
1845 shopt_ind
= shopt_len
= 0;