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Commit | Line | Data |
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bb70624e | 1 | /* shell.c -- GNU's idea of the POSIX shell specification. */ |
726f6388 | 2 | |
8868edaf | 3 | /* Copyright (C) 1987-2019 Free Software Foundation, Inc. |
726f6388 | 4 | |
bb70624e | 5 | This file is part of GNU Bash, the Bourne Again SHell. |
726f6388 | 6 | |
3185942a JA |
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. | |
726f6388 | 11 | |
3185942a JA |
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. | |
726f6388 | 16 | |
bb70624e | 17 | You should have received a copy of the GNU General Public License |
3185942a JA |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. |
19 | */ | |
726f6388 | 20 | |
3185942a | 21 | /* |
726f6388 JA |
22 | Birthdate: |
23 | Sunday, January 10th, 1988. | |
24 | Initial author: Brian Fox | |
25 | */ | |
26 | #define INSTALL_DEBUG_MODE | |
27 | ||
ccc6cda3 JA |
28 | #include "config.h" |
29 | ||
726f6388 | 30 | #include "bashtypes.h" |
b80f6443 | 31 | #if !defined (_MINIX) && defined (HAVE_SYS_FILE_H) |
cce855bc JA |
32 | # include <sys/file.h> |
33 | #endif | |
ccc6cda3 | 34 | #include "posixstat.h" |
f73dda09 | 35 | #include "posixtime.h" |
ccc6cda3 | 36 | #include "bashansi.h" |
726f6388 JA |
37 | #include <stdio.h> |
38 | #include <signal.h> | |
39 | #include <errno.h> | |
726f6388 | 40 | #include "filecntl.h" |
a0c0a00f CR |
41 | #if defined (HAVE_PWD_H) |
42 | # include <pwd.h> | |
43 | #endif | |
726f6388 | 44 | |
ccc6cda3 JA |
45 | #if defined (HAVE_UNISTD_H) |
46 | # include <unistd.h> | |
726f6388 JA |
47 | #endif |
48 | ||
b80f6443 JA |
49 | #include "bashintl.h" |
50 | ||
f73dda09 JA |
51 | #define NEED_SH_SETLINEBUF_DECL /* used in externs.h */ |
52 | ||
726f6388 | 53 | #include "shell.h" |
d233b485 | 54 | #include "parser.h" |
726f6388 | 55 | #include "flags.h" |
ccc6cda3 JA |
56 | #include "trap.h" |
57 | #include "mailcheck.h" | |
58 | #include "builtins.h" | |
59 | #include "builtins/common.h" | |
726f6388 JA |
60 | |
61 | #if defined (JOB_CONTROL) | |
62 | #include "jobs.h" | |
a0c0a00f | 63 | #else |
d233b485 | 64 | extern int running_in_background; |
8868edaf CR |
65 | extern int initialize_job_control PARAMS((int)); |
66 | extern int get_tty_state PARAMS((void)); | |
726f6388 JA |
67 | #endif /* JOB_CONTROL */ |
68 | ||
69 | #include "input.h" | |
70 | #include "execute_cmd.h" | |
cce855bc | 71 | #include "findcmd.h" |
726f6388 | 72 | |
7117c2d2 JA |
73 | #if defined (USING_BASH_MALLOC) && defined (DEBUG) && !defined (DISABLE_MALLOC_WRAPPERS) |
74 | # include <malloc/shmalloc.h> | |
75 | #endif | |
76 | ||
726f6388 JA |
77 | #if defined (HISTORY) |
78 | # include "bashhist.h" | |
79 | # include <readline/history.h> | |
80 | #endif | |
81 | ||
3185942a | 82 | #if defined (READLINE) |
84c617ec | 83 | # include <readline/readline.h> |
3185942a JA |
84 | # include "bashline.h" |
85 | #endif | |
86 | ||
726f6388 | 87 | #include <tilde/tilde.h> |
f73dda09 | 88 | #include <glob/strmatch.h> |
726f6388 | 89 | |
b72432fd JA |
90 | #if defined (__OPENNT) |
91 | # include <opennt/opennt.h> | |
92 | #endif | |
93 | ||
ccc6cda3 | 94 | #if !defined (HAVE_GETPW_DECLS) |
726f6388 | 95 | extern struct passwd *getpwuid (); |
ccc6cda3 | 96 | #endif /* !HAVE_GETPW_DECLS */ |
726f6388 | 97 | |
726f6388 JA |
98 | #if !defined (errno) |
99 | extern int errno; | |
100 | #endif | |
101 | ||
b72432fd JA |
102 | #if defined (NO_MAIN_ENV_ARG) |
103 | extern char **environ; /* used if no third argument to main() */ | |
104 | #endif | |
105 | ||
95732b49 | 106 | extern int gnu_error_format; |
726f6388 JA |
107 | |
108 | /* Non-zero means that this shell has already been run; i.e. you should | |
109 | call shell_reinitialize () if you need to start afresh. */ | |
ccc6cda3 | 110 | int shell_initialized = 0; |
d233b485 | 111 | int bash_argv_initialized = 0; |
726f6388 JA |
112 | |
113 | COMMAND *global_command = (COMMAND *)NULL; | |
114 | ||
726f6388 JA |
115 | /* Information about the current user. */ |
116 | struct user_info current_user = | |
117 | { | |
f73dda09 JA |
118 | (uid_t)-1, (uid_t)-1, (gid_t)-1, (gid_t)-1, |
119 | (char *)NULL, (char *)NULL, (char *)NULL | |
726f6388 JA |
120 | }; |
121 | ||
122 | /* The current host's name. */ | |
123 | char *current_host_name = (char *)NULL; | |
124 | ||
125 | /* Non-zero means that this shell is a login shell. | |
126 | Specifically: | |
127 | 0 = not login shell. | |
128 | 1 = login shell from getty (or equivalent fake out) | |
7117c2d2 | 129 | -1 = login shell from "--login" (or -l) flag. |
726f6388 JA |
130 | -2 = both from getty, and from flag. |
131 | */ | |
132 | int login_shell = 0; | |
133 | ||
134 | /* Non-zero means that at this moment, the shell is interactive. In | |
135 | general, this means that the shell is at this moment reading input | |
136 | from the keyboard. */ | |
137 | int interactive = 0; | |
138 | ||
139 | /* Non-zero means that the shell was started as an interactive shell. */ | |
140 | int interactive_shell = 0; | |
141 | ||
cce855bc JA |
142 | /* Non-zero means to send a SIGHUP to all jobs when an interactive login |
143 | shell exits. */ | |
144 | int hup_on_exit = 0; | |
145 | ||
3185942a JA |
146 | /* Non-zero means to list status of running and stopped jobs at shell exit */ |
147 | int check_jobs_at_exit = 0; | |
148 | ||
149 | /* Non-zero means to change to a directory name supplied as a command name */ | |
150 | int autocd = 0; | |
151 | ||
726f6388 JA |
152 | /* Tells what state the shell was in when it started: |
153 | 0 = non-interactive shell script | |
154 | 1 = interactive | |
155 | 2 = -c command | |
7117c2d2 | 156 | 3 = wordexp evaluation |
726f6388 JA |
157 | This is a superset of the information provided by interactive_shell. |
158 | */ | |
159 | int startup_state = 0; | |
a0c0a00f | 160 | int reading_shell_script = 0; |
726f6388 JA |
161 | |
162 | /* Special debugging helper. */ | |
163 | int debugging_login_shell = 0; | |
164 | ||
165 | /* The environment that the shell passes to other commands. */ | |
166 | char **shell_environment; | |
167 | ||
168 | /* Non-zero when we are executing a top-level command. */ | |
169 | int executing = 0; | |
170 | ||
171 | /* The number of commands executed so far. */ | |
172 | int current_command_number = 1; | |
173 | ||
726f6388 JA |
174 | /* Non-zero is the recursion depth for commands. */ |
175 | int indirection_level = 0; | |
176 | ||
726f6388 JA |
177 | /* The name of this shell, as taken from argv[0]. */ |
178 | char *shell_name = (char *)NULL; | |
179 | ||
180 | /* time in seconds when the shell was started */ | |
181 | time_t shell_start_time; | |
8868edaf | 182 | struct timeval shellstart; |
726f6388 | 183 | |
ccc6cda3 JA |
184 | /* Are we running in an emacs shell window? */ |
185 | int running_under_emacs; | |
186 | ||
3185942a JA |
187 | /* Do we have /dev/fd? */ |
188 | #ifdef HAVE_DEV_FD | |
189 | int have_devfd = HAVE_DEV_FD; | |
190 | #else | |
191 | int have_devfd = 0; | |
192 | #endif | |
193 | ||
726f6388 | 194 | /* The name of the .(shell)rc file. */ |
a0c0a00f | 195 | static char *bashrc_file = DEFAULT_BASHRC; |
726f6388 JA |
196 | |
197 | /* Non-zero means to act more like the Bourne shell on startup. */ | |
ccc6cda3 JA |
198 | static int act_like_sh; |
199 | ||
200 | /* Non-zero if this shell is being run by `su'. */ | |
201 | static int su_shell; | |
202 | ||
203 | /* Non-zero if we have already expanded and sourced $ENV. */ | |
204 | static int sourced_env; | |
205 | ||
206 | /* Is this shell running setuid? */ | |
207 | static int running_setuid; | |
726f6388 JA |
208 | |
209 | /* Values for the long-winded argument names. */ | |
ccc6cda3 JA |
210 | static int debugging; /* Do debugging things. */ |
211 | static int no_rc; /* Don't execute ~/.bashrc */ | |
212 | static int no_profile; /* Don't execute .profile */ | |
213 | static int do_version; /* Display interesting version info. */ | |
214 | static int make_login_shell; /* Make this shell be a `-bash' shell. */ | |
215 | static int want_initial_help; /* --help option */ | |
726f6388 | 216 | |
b80f6443 | 217 | int debugging_mode = 0; /* In debugging mode with --debugger */ |
ac50fbac CR |
218 | #if defined (READLINE) |
219 | int no_line_editing = 0; /* non-zero -> don't do fancy line editing. */ | |
220 | #else | |
221 | int no_line_editing = 1; /* can't have line editing without readline */ | |
222 | #endif | |
ccc6cda3 | 223 | int dump_translatable_strings; /* Dump strings in $"...", don't execute. */ |
cce855bc JA |
224 | int dump_po_strings; /* Dump strings in $"..." in po format */ |
225 | int wordexp_only = 0; /* Do word expansion only */ | |
b80f6443 | 226 | int protected_mode = 0; /* No command substitution with --wordexp */ |
726f6388 | 227 | |
d233b485 CR |
228 | int pretty_print_mode = 0; /* pretty-print a shell script */ |
229 | ||
95732b49 JA |
230 | #if defined (STRICT_POSIX) |
231 | int posixly_correct = 1; /* Non-zero means posix.2 superset. */ | |
232 | #else | |
233 | int posixly_correct = 0; /* Non-zero means posix.2 superset. */ | |
234 | #endif | |
235 | ||
726f6388 JA |
236 | /* Some long-winded argument names. These are obviously new. */ |
237 | #define Int 1 | |
238 | #define Charp 2 | |
3185942a JA |
239 | static const struct { |
240 | const char *name; | |
726f6388 JA |
241 | int type; |
242 | int *int_value; | |
243 | char **char_value; | |
244 | } long_args[] = { | |
245 | { "debug", Int, &debugging, (char **)0x0 }, | |
b80f6443 JA |
246 | #if defined (DEBUGGER) |
247 | { "debugger", Int, &debugging_mode, (char **)0x0 }, | |
248 | #endif | |
cce855bc | 249 | { "dump-po-strings", Int, &dump_po_strings, (char **)0x0 }, |
ccc6cda3 JA |
250 | { "dump-strings", Int, &dump_translatable_strings, (char **)0x0 }, |
251 | { "help", Int, &want_initial_help, (char **)0x0 }, | |
28ef6c31 | 252 | { "init-file", Charp, (int *)0x0, &bashrc_file }, |
ccc6cda3 JA |
253 | { "login", Int, &make_login_shell, (char **)0x0 }, |
254 | { "noediting", Int, &no_line_editing, (char **)0x0 }, | |
726f6388 | 255 | { "noprofile", Int, &no_profile, (char **)0x0 }, |
ccc6cda3 JA |
256 | { "norc", Int, &no_rc, (char **)0x0 }, |
257 | { "posix", Int, &posixly_correct, (char **)0x0 }, | |
d233b485 | 258 | { "pretty-print", Int, &pretty_print_mode, (char **)0x0 }, |
ac50fbac | 259 | #if defined (WORDEXP_OPTION) |
b80f6443 | 260 | { "protected", Int, &protected_mode, (char **)0x0 }, |
ac50fbac | 261 | #endif |
726f6388 | 262 | { "rcfile", Charp, (int *)0x0, &bashrc_file }, |
ccc6cda3 JA |
263 | #if defined (RESTRICTED_SHELL) |
264 | { "restricted", Int, &restricted, (char **)0x0 }, | |
265 | #endif | |
a0c0a00f | 266 | { "verbose", Int, &verbose_flag, (char **)0x0 }, |
726f6388 | 267 | { "version", Int, &do_version, (char **)0x0 }, |
0001803f | 268 | #if defined (WORDEXP_OPTION) |
cce855bc | 269 | { "wordexp", Int, &wordexp_only, (char **)0x0 }, |
0001803f | 270 | #endif |
726f6388 JA |
271 | { (char *)0x0, Int, (int *)0x0, (char **)0x0 } |
272 | }; | |
273 | ||
274 | /* These are extern so execute_simple_command can set them, and then | |
275 | longjmp back to main to execute a shell script, instead of calling | |
276 | main () again and resulting in indefinite, possibly fatal, stack | |
277 | growth. */ | |
ccc6cda3 | 278 | procenv_t subshell_top_level; |
726f6388 JA |
279 | int subshell_argc; |
280 | char **subshell_argv; | |
281 | char **subshell_envp; | |
282 | ||
495aee44 CR |
283 | char *exec_argv0; |
284 | ||
726f6388 JA |
285 | #if defined (BUFFERED_INPUT) |
286 | /* The file descriptor from which the shell is reading input. */ | |
287 | int default_buffered_input = -1; | |
288 | #endif | |
289 | ||
bb70624e JA |
290 | /* The following two variables are not static so they can show up in $-. */ |
291 | int read_from_stdin; /* -s flag supplied */ | |
292 | int want_pending_command; /* -c flag supplied */ | |
293 | ||
b80f6443 JA |
294 | /* This variable is not static so it can be bound to $BASH_EXECUTION_STRING */ |
295 | char *command_execution_string; /* argument to -c option */ | |
d233b485 | 296 | char *shell_script_filename; /* shell script */ |
b80f6443 | 297 | |
7117c2d2 JA |
298 | int malloc_trace_at_exit = 0; |
299 | ||
28ef6c31 | 300 | static int shell_reinitialized = 0; |
726f6388 | 301 | |
ccc6cda3 JA |
302 | static FILE *default_input; |
303 | ||
f73dda09 JA |
304 | static STRING_INT_ALIST *shopt_alist; |
305 | static int shopt_ind = 0, shopt_len = 0; | |
306 | ||
8868edaf CR |
307 | static int parse_long_options PARAMS((char **, int, int)); |
308 | static int parse_shell_options PARAMS((char **, int, int)); | |
309 | static int bind_args PARAMS((char **, int, int, int)); | |
f73dda09 | 310 | |
8868edaf | 311 | static void start_debugger PARAMS((void)); |
b80f6443 | 312 | |
8868edaf CR |
313 | static void add_shopt_to_alist PARAMS((char *, int)); |
314 | static void run_shopt_alist PARAMS((void)); | |
ccc6cda3 | 315 | |
8868edaf CR |
316 | static void execute_env_file PARAMS((char *)); |
317 | static void run_startup_files PARAMS((void)); | |
318 | static int open_shell_script PARAMS((char *)); | |
319 | static void set_bash_input PARAMS((void)); | |
320 | static int run_one_command PARAMS((char *)); | |
0001803f | 321 | #if defined (WORDEXP_OPTION) |
8868edaf | 322 | static int run_wordexp PARAMS((char *)); |
0001803f | 323 | #endif |
726f6388 | 324 | |
8868edaf | 325 | static int uidget PARAMS((void)); |
726f6388 | 326 | |
8868edaf CR |
327 | static void set_option_defaults PARAMS((void)); |
328 | static void reset_option_defaults PARAMS((void)); | |
f73dda09 | 329 | |
8868edaf CR |
330 | static void init_interactive PARAMS((void)); |
331 | static void init_noninteractive PARAMS((void)); | |
332 | static void init_interactive_script PARAMS((void)); | |
f73dda09 | 333 | |
8868edaf CR |
334 | static void set_shell_name PARAMS((char *)); |
335 | static void shell_initialize PARAMS((void)); | |
336 | static void shell_reinitialize PARAMS((void)); | |
337 | ||
338 | static void show_shell_usage PARAMS((FILE *, int)); | |
ccc6cda3 | 339 | |
28ef6c31 | 340 | #ifdef __CYGWIN__ |
cce855bc JA |
341 | static void |
342 | _cygwin32_check_tmp () | |
343 | { | |
344 | struct stat sb; | |
345 | ||
346 | if (stat ("/tmp", &sb) < 0) | |
b80f6443 | 347 | internal_warning (_("could not find /tmp, please create!")); |
cce855bc JA |
348 | else |
349 | { | |
350 | if (S_ISDIR (sb.st_mode) == 0) | |
b80f6443 | 351 | internal_warning (_("/tmp must be a valid directory name")); |
cce855bc JA |
352 | } |
353 | } | |
28ef6c31 | 354 | #endif /* __CYGWIN__ */ |
cce855bc | 355 | |
b72432fd JA |
356 | #if defined (NO_MAIN_ENV_ARG) |
357 | /* systems without third argument to main() */ | |
358 | int | |
359 | main (argc, argv) | |
360 | int argc; | |
361 | char **argv; | |
362 | #else /* !NO_MAIN_ENV_ARG */ | |
ccc6cda3 | 363 | int |
726f6388 JA |
364 | main (argc, argv, env) |
365 | int argc; | |
366 | char **argv, **env; | |
b72432fd | 367 | #endif /* !NO_MAIN_ENV_ARG */ |
726f6388 JA |
368 | { |
369 | register int i; | |
f73dda09 JA |
370 | int code, old_errexit_flag; |
371 | #if defined (RESTRICTED_SHELL) | |
372 | int saverst; | |
373 | #endif | |
ccc6cda3 JA |
374 | volatile int locally_skip_execution; |
375 | volatile int arg_index, top_level_arg_index; | |
b72432fd JA |
376 | #ifdef __OPENNT |
377 | char **env; | |
378 | ||
379 | env = environ; | |
380 | #endif /* __OPENNT */ | |
ccc6cda3 | 381 | |
f73dda09 JA |
382 | USE_VAR(argc); |
383 | USE_VAR(argv); | |
384 | USE_VAR(env); | |
385 | USE_VAR(code); | |
386 | USE_VAR(old_errexit_flag); | |
387 | #if defined (RESTRICTED_SHELL) | |
388 | USE_VAR(saverst); | |
389 | #endif | |
390 | ||
ccc6cda3 | 391 | /* Catch early SIGINTs. */ |
ac50fbac | 392 | code = setjmp_nosigs (top_level); |
ccc6cda3 JA |
393 | if (code) |
394 | exit (2); | |
395 | ||
0001803f CR |
396 | xtrace_init (); |
397 | ||
7117c2d2 | 398 | #if defined (USING_BASH_MALLOC) && defined (DEBUG) && !defined (DISABLE_MALLOC_WRAPPERS) |
a0c0a00f | 399 | malloc_set_register (1); /* XXX - change to 1 for malloc debugging */ |
f73dda09 JA |
400 | #endif |
401 | ||
ccc6cda3 | 402 | check_dev_tty (); |
726f6388 | 403 | |
28ef6c31 | 404 | #ifdef __CYGWIN__ |
cce855bc | 405 | _cygwin32_check_tmp (); |
28ef6c31 | 406 | #endif /* __CYGWIN__ */ |
cce855bc | 407 | |
726f6388 | 408 | /* Wait forever if we are debugging a login shell. */ |
95732b49 | 409 | while (debugging_login_shell) sleep (3); |
726f6388 | 410 | |
ccc6cda3 | 411 | set_default_locale (); |
726f6388 | 412 | |
ccc6cda3 | 413 | running_setuid = uidget (); |
726f6388 | 414 | |
28ef6c31 JA |
415 | if (getenv ("POSIXLY_CORRECT") || getenv ("POSIX_PEDANTIC")) |
416 | posixly_correct = 1; | |
726f6388 JA |
417 | |
418 | #if defined (USE_GNU_MALLOC_LIBRARY) | |
419 | mcheck (programming_error, (void (*) ())0); | |
420 | #endif /* USE_GNU_MALLOC_LIBRARY */ | |
421 | ||
a0c0a00f | 422 | if (setjmp_sigs (subshell_top_level)) |
726f6388 JA |
423 | { |
424 | argc = subshell_argc; | |
425 | argv = subshell_argv; | |
426 | env = subshell_envp; | |
427 | sourced_env = 0; | |
428 | } | |
429 | ||
28ef6c31 JA |
430 | shell_reinitialized = 0; |
431 | ||
ccc6cda3 | 432 | /* Initialize `local' variables for all `invocations' of main (). */ |
726f6388 | 433 | arg_index = 1; |
95732b49 JA |
434 | if (arg_index > argc) |
435 | arg_index = argc; | |
d233b485 | 436 | command_execution_string = shell_script_filename = (char *)NULL; |
ccc6cda3 | 437 | want_pending_command = locally_skip_execution = read_from_stdin = 0; |
726f6388 JA |
438 | default_input = stdin; |
439 | #if defined (BUFFERED_INPUT) | |
440 | default_buffered_input = -1; | |
441 | #endif | |
442 | ||
443 | /* Fix for the `infinite process creation' bug when running shell scripts | |
444 | from startup files on System V. */ | |
445 | login_shell = make_login_shell = 0; | |
446 | ||
447 | /* If this shell has already been run, then reinitialize it to a | |
448 | vanilla state. */ | |
449 | if (shell_initialized || shell_name) | |
450 | { | |
451 | /* Make sure that we do not infinitely recurse as a login shell. */ | |
452 | if (*shell_name == '-') | |
453 | shell_name++; | |
454 | ||
455 | shell_reinitialize (); | |
ac50fbac | 456 | if (setjmp_nosigs (top_level)) |
726f6388 JA |
457 | exit (2); |
458 | } | |
459 | ||
726f6388 | 460 | shell_environment = env; |
ccc6cda3 | 461 | set_shell_name (argv[0]); |
8868edaf CR |
462 | |
463 | gettimeofday (&shellstart, 0); | |
464 | shell_start_time = shellstart.tv_sec; | |
726f6388 | 465 | |
726f6388 JA |
466 | /* Parse argument flags from the input line. */ |
467 | ||
468 | /* Find full word arguments first. */ | |
ccc6cda3 | 469 | arg_index = parse_long_options (argv, arg_index, argc); |
a0c0a00f | 470 | |
ccc6cda3 | 471 | if (want_initial_help) |
726f6388 | 472 | { |
d166f048 | 473 | show_shell_usage (stdout, 1); |
ccc6cda3 | 474 | exit (EXECUTION_SUCCESS); |
726f6388 JA |
475 | } |
476 | ||
ccc6cda3 JA |
477 | if (do_version) |
478 | { | |
479 | show_shell_version (1); | |
480 | exit (EXECUTION_SUCCESS); | |
481 | } | |
726f6388 | 482 | |
a0c0a00f CR |
483 | echo_input_at_read = verbose_flag; /* --verbose given */ |
484 | ||
7117c2d2 JA |
485 | /* All done with full word options; do standard shell option parsing.*/ |
486 | this_command_name = shell_name; /* for error reporting */ | |
487 | arg_index = parse_shell_options (argv, arg_index, argc); | |
488 | ||
489 | /* If user supplied the "--login" (or -l) flag, then set and invert | |
490 | LOGIN_SHELL. */ | |
726f6388 JA |
491 | if (make_login_shell) |
492 | { | |
493 | login_shell++; | |
494 | login_shell = -login_shell; | |
495 | } | |
496 | ||
0001803f | 497 | set_login_shell ("login_shell", login_shell != 0); |
f73dda09 | 498 | |
cce855bc JA |
499 | if (dump_po_strings) |
500 | dump_translatable_strings = 1; | |
501 | ||
ccc6cda3 JA |
502 | if (dump_translatable_strings) |
503 | read_but_dont_execute = 1; | |
726f6388 | 504 | |
ccc6cda3 JA |
505 | if (running_setuid && privileged_mode == 0) |
506 | disable_priv_mode (); | |
726f6388 JA |
507 | |
508 | /* Need to get the argument to a -c option processed in the | |
509 | above loop. The next arg is a command to execute, and the | |
510 | following args are $0...$n respectively. */ | |
511 | if (want_pending_command) | |
512 | { | |
b80f6443 JA |
513 | command_execution_string = argv[arg_index]; |
514 | if (command_execution_string == 0) | |
726f6388 | 515 | { |
b80f6443 JA |
516 | report_error (_("%s: option requires an argument"), "-c"); |
517 | exit (EX_BADUSAGE); | |
726f6388 JA |
518 | } |
519 | arg_index++; | |
520 | } | |
ccc6cda3 | 521 | this_command_name = (char *)NULL; |
726f6388 JA |
522 | |
523 | /* First, let the outside world know about our interactive status. | |
524 | A shell is interactive if the `-i' flag was given, or if all of | |
525 | the following conditions are met: | |
526 | no -c command | |
527 | no arguments remaining or the -s flag given | |
528 | standard input is a terminal | |
b80f6443 | 529 | standard error is a terminal |
726f6388 JA |
530 | Refer to Posix.2, the description of the `sh' utility. */ |
531 | ||
532 | if (forced_interactive || /* -i flag */ | |
b80f6443 | 533 | (!command_execution_string && /* No -c command and ... */ |
cce855bc | 534 | wordexp_only == 0 && /* No --wordexp and ... */ |
726f6388 JA |
535 | ((arg_index == argc) || /* no remaining args or... */ |
536 | read_from_stdin) && /* -s flag with args, and */ | |
537 | isatty (fileno (stdin)) && /* Input is a terminal and */ | |
b80f6443 | 538 | isatty (fileno (stderr)))) /* error output is a terminal. */ |
ccc6cda3 | 539 | init_interactive (); |
726f6388 | 540 | else |
ccc6cda3 | 541 | init_noninteractive (); |
726f6388 | 542 | |
726f6388 JA |
543 | /* |
544 | * Some systems have the bad habit of starting login shells with lots of open | |
545 | * file descriptors. For instance, most systems that have picked up the | |
546 | * pre-4.0 Sun YP code leave a file descriptor open each time you call one | |
547 | * of the getpw* functions, and it's set to be open across execs. That | |
495aee44 CR |
548 | * means one for login, one for xterm, one for shelltool, etc. There are |
549 | * also systems that open persistent FDs to other agents or files as part | |
550 | * of process startup; these need to be set to be close-on-exec. | |
726f6388 JA |
551 | */ |
552 | if (login_shell && interactive_shell) | |
553 | { | |
554 | for (i = 3; i < 20; i++) | |
495aee44 | 555 | SET_CLOSE_ON_EXEC (i); |
726f6388 | 556 | } |
726f6388 | 557 | |
7117c2d2 JA |
558 | /* If we're in a strict Posix.2 mode, turn on interactive comments, |
559 | alias expansion in non-interactive shells, and other Posix.2 things. */ | |
d166f048 JA |
560 | if (posixly_correct) |
561 | { | |
95732b49 | 562 | bind_variable ("POSIXLY_CORRECT", "y", 0); |
28ef6c31 | 563 | sv_strict_posix ("POSIXLY_CORRECT"); |
d166f048 JA |
564 | } |
565 | ||
f73dda09 JA |
566 | /* Now we run the shopt_alist and process the options. */ |
567 | if (shopt_alist) | |
568 | run_shopt_alist (); | |
569 | ||
726f6388 JA |
570 | /* From here on in, the shell must be a normal functioning shell. |
571 | Variables from the environment are expected to be set, etc. */ | |
572 | shell_initialize (); | |
573 | ||
0628567a | 574 | set_default_lang (); |
ccc6cda3 JA |
575 | set_default_locale_vars (); |
576 | ||
3185942a | 577 | /* |
a0c0a00f CR |
578 | * M-x term -> TERM=eterm-color INSIDE_EMACS='251,term:0.96' (eterm) |
579 | * M-x shell -> TERM='dumb' INSIDE_EMACS='25.1,comint' (no line editing) | |
580 | * | |
581 | * Older versions of Emacs may set EMACS to 't' or to something like | |
582 | * '22.1 (term:0.96)' instead of (or in addition to) setting INSIDE_EMACS. | |
583 | * They may set TERM to 'eterm' instead of 'eterm-color'. They may have | |
584 | * a now-obsolete command that sets neither EMACS nor INSIDE_EMACS: | |
585 | * M-x terminal -> TERM='emacs-em7955' (line editing) | |
3185942a | 586 | */ |
726f6388 JA |
587 | if (interactive_shell) |
588 | { | |
d233b485 | 589 | char *term, *emacs, *inside_emacs; |
a0c0a00f | 590 | int emacs_term, in_emacs; |
ccc6cda3 | 591 | |
b80f6443 | 592 | term = get_string_value ("TERM"); |
b80f6443 | 593 | emacs = get_string_value ("EMACS"); |
a0c0a00f CR |
594 | inside_emacs = get_string_value ("INSIDE_EMACS"); |
595 | ||
596 | if (inside_emacs) | |
597 | { | |
598 | emacs_term = strstr (inside_emacs, ",term:") != 0; | |
599 | in_emacs = 1; | |
600 | } | |
601 | else if (emacs) | |
602 | { | |
603 | /* Infer whether we are in an older Emacs. */ | |
604 | emacs_term = strstr (emacs, " (term:") != 0; | |
605 | in_emacs = emacs_term || STREQ (emacs, "t"); | |
606 | } | |
607 | else | |
608 | in_emacs = emacs_term = 0; | |
3185942a JA |
609 | |
610 | /* Not sure any emacs terminal emulator sets TERM=emacs any more */ | |
a0c0a00f CR |
611 | no_line_editing |= STREQ (term, "emacs"); |
612 | no_line_editing |= in_emacs && STREQ (term, "dumb"); | |
3185942a JA |
613 | |
614 | /* running_under_emacs == 2 for `eterm' */ | |
a0c0a00f CR |
615 | running_under_emacs = in_emacs || STREQN (term, "emacs", 5); |
616 | running_under_emacs += emacs_term && STREQN (term, "eterm", 5); | |
3185942a | 617 | |
95732b49 JA |
618 | if (running_under_emacs) |
619 | gnu_error_format = 1; | |
726f6388 JA |
620 | } |
621 | ||
622 | top_level_arg_index = arg_index; | |
b72432fd | 623 | old_errexit_flag = exit_immediately_on_error; |
726f6388 | 624 | |
726f6388 JA |
625 | /* Give this shell a place to longjmp to before executing the |
626 | startup files. This allows users to press C-c to abort the | |
627 | lengthy startup. */ | |
a0c0a00f | 628 | code = setjmp_sigs (top_level); |
ccc6cda3 JA |
629 | if (code) |
630 | { | |
b80f6443 | 631 | if (code == EXITPROG || code == ERREXIT) |
ccc6cda3 JA |
632 | exit_shell (last_command_exit_value); |
633 | else | |
d166f048 JA |
634 | { |
635 | #if defined (JOB_CONTROL) | |
636 | /* Reset job control, since run_startup_files turned it off. */ | |
637 | set_job_control (interactive_shell); | |
638 | #endif | |
b72432fd JA |
639 | /* Reset value of `set -e', since it's turned off before running |
640 | the startup files. */ | |
641 | exit_immediately_on_error += old_errexit_flag; | |
d166f048 JA |
642 | locally_skip_execution++; |
643 | } | |
ccc6cda3 | 644 | } |
726f6388 JA |
645 | |
646 | arg_index = top_level_arg_index; | |
647 | ||
648 | /* Execute the start-up scripts. */ | |
649 | ||
ccc6cda3 | 650 | if (interactive_shell == 0) |
726f6388 | 651 | { |
7117c2d2 JA |
652 | unbind_variable ("PS1"); |
653 | unbind_variable ("PS2"); | |
28ef6c31 | 654 | interactive = 0; |
7117c2d2 JA |
655 | #if 0 |
656 | /* This has already been done by init_noninteractive */ | |
28ef6c31 | 657 | expand_aliases = posixly_correct; |
7117c2d2 | 658 | #endif |
726f6388 JA |
659 | } |
660 | else | |
661 | { | |
662 | change_flag ('i', FLAG_ON); | |
663 | interactive = 1; | |
664 | } | |
665 | ||
e8ce775d | 666 | #if defined (RESTRICTED_SHELL) |
b72432fd JA |
667 | /* Set restricted_shell based on whether the basename of $0 indicates that |
668 | the shell should be restricted or if the `-r' option was supplied at | |
669 | startup. */ | |
670 | restricted_shell = shell_is_restricted (shell_name); | |
671 | ||
e8ce775d JA |
672 | /* If the `-r' option is supplied at invocation, make sure that the shell |
673 | is not in restricted mode when running the startup files. */ | |
b72432fd JA |
674 | saverst = restricted; |
675 | restricted = 0; | |
e8ce775d JA |
676 | #endif |
677 | ||
d233b485 CR |
678 | /* Set positional parameters before running startup files. top_level_arg_index |
679 | holds the index of the current argument before setting the positional | |
680 | parameters, so any changes performed in the startup files won't affect | |
681 | later option processing. */ | |
682 | if (wordexp_only) | |
683 | ; /* nothing yet */ | |
684 | else if (command_execution_string) | |
685 | arg_index = bind_args (argv, arg_index, argc, 0); /* $0 ... $n */ | |
686 | else if (arg_index != argc && read_from_stdin == 0) | |
687 | { | |
688 | shell_script_filename = argv[arg_index++]; | |
689 | arg_index = bind_args (argv, arg_index, argc, 1); /* $1 ... $n */ | |
690 | } | |
691 | else | |
692 | arg_index = bind_args (argv, arg_index, argc, 1); /* $1 ... $n */ | |
693 | ||
b72432fd | 694 | /* The startup files are run with `set -e' temporarily disabled. */ |
ccc6cda3 | 695 | if (locally_skip_execution == 0 && running_setuid == 0) |
b72432fd JA |
696 | { |
697 | old_errexit_flag = exit_immediately_on_error; | |
698 | exit_immediately_on_error = 0; | |
699 | ||
700 | run_startup_files (); | |
b72432fd JA |
701 | exit_immediately_on_error += old_errexit_flag; |
702 | } | |
726f6388 | 703 | |
ccc6cda3 JA |
704 | /* If we are invoked as `sh', turn on Posix mode. */ |
705 | if (act_like_sh) | |
d166f048 | 706 | { |
95732b49 | 707 | bind_variable ("POSIXLY_CORRECT", "y", 0); |
28ef6c31 | 708 | sv_strict_posix ("POSIXLY_CORRECT"); |
d166f048 | 709 | } |
ccc6cda3 | 710 | |
726f6388 | 711 | #if defined (RESTRICTED_SHELL) |
cce855bc | 712 | /* Turn on the restrictions after executing the startup files. This |
e8ce775d JA |
713 | means that `bash -r' or `set -r' invoked from a startup file will |
714 | turn on the restrictions after the startup files are executed. */ | |
715 | restricted = saverst || restricted; | |
28ef6c31 JA |
716 | if (shell_reinitialized == 0) |
717 | maybe_make_restricted (shell_name); | |
726f6388 JA |
718 | #endif /* RESTRICTED_SHELL */ |
719 | ||
0001803f | 720 | #if defined (WORDEXP_OPTION) |
cce855bc JA |
721 | if (wordexp_only) |
722 | { | |
723 | startup_state = 3; | |
d233b485 | 724 | last_command_exit_value = run_wordexp (argv[top_level_arg_index]); |
cce855bc JA |
725 | exit_shell (last_command_exit_value); |
726 | } | |
0001803f | 727 | #endif |
cce855bc | 728 | |
a0c0a00f CR |
729 | cmd_init (); /* initialize the command object caches */ |
730 | uwp_init (); | |
731 | ||
b80f6443 | 732 | if (command_execution_string) |
ccc6cda3 | 733 | { |
ccc6cda3 | 734 | startup_state = 2; |
b80f6443 JA |
735 | |
736 | if (debugging_mode) | |
737 | start_debugger (); | |
738 | ||
726f6388 | 739 | #if defined (ONESHOT) |
f73dda09 | 740 | executing = 1; |
b80f6443 | 741 | run_one_command (command_execution_string); |
ccc6cda3 | 742 | exit_shell (last_command_exit_value); |
726f6388 | 743 | #else /* ONESHOT */ |
b80f6443 | 744 | with_input_from_string (command_execution_string, "-c"); |
ccc6cda3 | 745 | goto read_and_execute; |
726f6388 | 746 | #endif /* !ONESHOT */ |
ccc6cda3 JA |
747 | } |
748 | ||
749 | /* Get possible input filename and set up default_buffered_input or | |
750 | default_input as appropriate. */ | |
d233b485 CR |
751 | if (shell_script_filename) |
752 | open_shell_script (shell_script_filename); | |
ccc6cda3 | 753 | else if (interactive == 0) |
a0c0a00f CR |
754 | { |
755 | /* In this mode, bash is reading a script from stdin, which is a | |
756 | pipe or redirected file. */ | |
ccc6cda3 | 757 | #if defined (BUFFERED_INPUT) |
a0c0a00f | 758 | default_buffered_input = fileno (stdin); /* == 0 */ |
ccc6cda3 | 759 | #else |
a0c0a00f | 760 | setbuf (default_input, (char *)NULL); |
ccc6cda3 | 761 | #endif /* !BUFFERED_INPUT */ |
a0c0a00f CR |
762 | read_from_stdin = 1; |
763 | } | |
d233b485 | 764 | else if (top_level_arg_index == argc) /* arg index before startup files */ |
a0c0a00f CR |
765 | /* "If there are no operands and the -c option is not specified, the -s |
766 | option shall be assumed." */ | |
767 | read_from_stdin = 1; | |
ccc6cda3 JA |
768 | |
769 | set_bash_input (); | |
770 | ||
a0c0a00f | 771 | if (debugging_mode && locally_skip_execution == 0 && running_setuid == 0 && (reading_shell_script || interactive_shell == 0)) |
b80f6443 JA |
772 | start_debugger (); |
773 | ||
726f6388 JA |
774 | /* Do the things that should be done only for interactive shells. */ |
775 | if (interactive_shell) | |
776 | { | |
777 | /* Set up for checking for presence of mail. */ | |
726f6388 | 778 | reset_mail_timer (); |
3185942a | 779 | init_mail_dates (); |
726f6388 JA |
780 | |
781 | #if defined (HISTORY) | |
782 | /* Initialize the interactive history stuff. */ | |
ccc6cda3 | 783 | bash_initialize_history (); |
7117c2d2 JA |
784 | /* Don't load the history from the history file if we've already |
785 | saved some lines in this session (e.g., by putting `history -s xx' | |
786 | into one of the startup files). */ | |
787 | if (shell_initialized == 0 && history_lines_this_session == 0) | |
726f6388 JA |
788 | load_history (); |
789 | #endif /* HISTORY */ | |
790 | ||
791 | /* Initialize terminal state for interactive shells after the | |
792 | .bash_profile and .bashrc are interpreted. */ | |
793 | get_tty_state (); | |
794 | } | |
795 | ||
ccc6cda3 JA |
796 | #if !defined (ONESHOT) |
797 | read_and_execute: | |
798 | #endif /* !ONESHOT */ | |
726f6388 | 799 | |
ccc6cda3 | 800 | shell_initialized = 1; |
726f6388 | 801 | |
d233b485 CR |
802 | if (pretty_print_mode && interactive_shell) |
803 | { | |
804 | internal_warning (_("pretty-printing mode ignored in interactive shells")); | |
805 | pretty_print_mode = 0; | |
806 | } | |
807 | if (pretty_print_mode) | |
808 | exit_shell (pretty_print_loop ()); | |
809 | ||
ccc6cda3 JA |
810 | /* Read commands until exit condition. */ |
811 | reader_loop (); | |
812 | exit_shell (last_command_exit_value); | |
813 | } | |
726f6388 | 814 | |
ccc6cda3 JA |
815 | static int |
816 | parse_long_options (argv, arg_start, arg_end) | |
817 | char **argv; | |
818 | int arg_start, arg_end; | |
819 | { | |
820 | int arg_index, longarg, i; | |
821 | char *arg_string; | |
822 | ||
823 | arg_index = arg_start; | |
824 | while ((arg_index != arg_end) && (arg_string = argv[arg_index]) && | |
825 | (*arg_string == '-')) | |
826 | { | |
827 | longarg = 0; | |
828 | ||
829 | /* Make --login equivalent to -login. */ | |
830 | if (arg_string[1] == '-' && arg_string[2]) | |
726f6388 | 831 | { |
ccc6cda3 JA |
832 | longarg = 1; |
833 | arg_string++; | |
726f6388 JA |
834 | } |
835 | ||
ccc6cda3 | 836 | for (i = 0; long_args[i].name; i++) |
726f6388 | 837 | { |
ccc6cda3 | 838 | if (STREQ (arg_string + 1, long_args[i].name)) |
726f6388 | 839 | { |
ccc6cda3 JA |
840 | if (long_args[i].type == Int) |
841 | *long_args[i].int_value = 1; | |
842 | else if (argv[++arg_index] == 0) | |
843 | { | |
b80f6443 JA |
844 | report_error (_("%s: option requires an argument"), long_args[i].name); |
845 | exit (EX_BADUSAGE); | |
ccc6cda3 JA |
846 | } |
847 | else | |
848 | *long_args[i].char_value = argv[arg_index]; | |
849 | ||
850 | break; | |
726f6388 | 851 | } |
726f6388 | 852 | } |
ccc6cda3 | 853 | if (long_args[i].name == 0) |
726f6388 | 854 | { |
ccc6cda3 JA |
855 | if (longarg) |
856 | { | |
b80f6443 | 857 | report_error (_("%s: invalid option"), argv[arg_index]); |
d166f048 | 858 | show_shell_usage (stderr, 0); |
b80f6443 | 859 | exit (EX_BADUSAGE); |
ccc6cda3 JA |
860 | } |
861 | break; /* No such argument. Maybe flag arg. */ | |
726f6388 | 862 | } |
726f6388 | 863 | |
ccc6cda3 JA |
864 | arg_index++; |
865 | } | |
866 | ||
867 | return (arg_index); | |
868 | } | |
869 | ||
870 | static int | |
871 | parse_shell_options (argv, arg_start, arg_end) | |
872 | char **argv; | |
873 | int arg_start, arg_end; | |
874 | { | |
875 | int arg_index; | |
876 | int arg_character, on_or_off, next_arg, i; | |
877 | char *o_option, *arg_string; | |
878 | ||
879 | arg_index = arg_start; | |
880 | while (arg_index != arg_end && (arg_string = argv[arg_index]) && | |
881 | (*arg_string == '-' || *arg_string == '+')) | |
882 | { | |
883 | /* There are flag arguments, so parse them. */ | |
884 | next_arg = arg_index + 1; | |
885 | ||
886 | /* A single `-' signals the end of options. From the 4.3 BSD sh. | |
887 | An option `--' means the same thing; this is the standard | |
888 | getopt(3) meaning. */ | |
889 | if (arg_string[0] == '-' && | |
890 | (arg_string[1] == '\0' || | |
891 | (arg_string[1] == '-' && arg_string[2] == '\0'))) | |
892 | return (next_arg); | |
726f6388 | 893 | |
ccc6cda3 JA |
894 | i = 1; |
895 | on_or_off = arg_string[0]; | |
896 | while (arg_character = arg_string[i++]) | |
726f6388 | 897 | { |
ccc6cda3 JA |
898 | switch (arg_character) |
899 | { | |
900 | case 'c': | |
901 | want_pending_command = 1; | |
902 | break; | |
903 | ||
7117c2d2 JA |
904 | case 'l': |
905 | make_login_shell = 1; | |
906 | break; | |
907 | ||
ccc6cda3 JA |
908 | case 's': |
909 | read_from_stdin = 1; | |
910 | break; | |
911 | ||
912 | case 'o': | |
913 | o_option = argv[next_arg]; | |
914 | if (o_option == 0) | |
915 | { | |
8868edaf | 916 | set_option_defaults (); |
cce855bc | 917 | list_minus_o_opts (-1, (on_or_off == '-') ? 0 : 1); |
8868edaf | 918 | reset_option_defaults (); |
ccc6cda3 JA |
919 | break; |
920 | } | |
921 | if (set_minus_o_option (on_or_off, o_option) != EXECUTION_SUCCESS) | |
b80f6443 | 922 | exit (EX_BADUSAGE); |
ccc6cda3 JA |
923 | next_arg++; |
924 | break; | |
925 | ||
f73dda09 JA |
926 | case 'O': |
927 | /* Since some of these can be overridden by the normal | |
928 | interactive/non-interactive shell initialization or | |
929 | initializing posix mode, we save the options and process | |
930 | them after initialization. */ | |
931 | o_option = argv[next_arg]; | |
932 | if (o_option == 0) | |
933 | { | |
934 | shopt_listopt (o_option, (on_or_off == '-') ? 0 : 1); | |
935 | break; | |
936 | } | |
937 | add_shopt_to_alist (o_option, on_or_off); | |
938 | next_arg++; | |
939 | break; | |
940 | ||
ccc6cda3 JA |
941 | case 'D': |
942 | dump_translatable_strings = 1; | |
943 | break; | |
944 | ||
945 | default: | |
946 | if (change_flag (arg_character, on_or_off) == FLAG_ERROR) | |
947 | { | |
b80f6443 | 948 | report_error (_("%c%c: invalid option"), on_or_off, arg_character); |
d166f048 | 949 | show_shell_usage (stderr, 0); |
b80f6443 | 950 | exit (EX_BADUSAGE); |
ccc6cda3 JA |
951 | } |
952 | } | |
726f6388 | 953 | } |
ccc6cda3 JA |
954 | /* Can't do just a simple increment anymore -- what about |
955 | "bash -abouo emacs ignoreeof -hP"? */ | |
956 | arg_index = next_arg; | |
957 | } | |
726f6388 | 958 | |
ccc6cda3 JA |
959 | return (arg_index); |
960 | } | |
726f6388 | 961 | |
ccc6cda3 | 962 | /* Exit the shell with status S. */ |
cce855bc | 963 | void |
ccc6cda3 JA |
964 | exit_shell (s) |
965 | int s; | |
966 | { | |
0001803f CR |
967 | fflush (stdout); /* XXX */ |
968 | fflush (stderr); | |
969 | ||
84c617ec CR |
970 | /* Clean up the terminal if we are in a state where it's been modified. */ |
971 | #if defined (READLINE) | |
972 | if (RL_ISSTATE (RL_STATE_TERMPREPPED) && rl_deprep_term_function) | |
973 | (*rl_deprep_term_function) (); | |
974 | #endif | |
975 | if (read_tty_modified ()) | |
976 | read_tty_cleanup (); | |
977 | ||
ccc6cda3 JA |
978 | /* Do trap[0] if defined. Allow it to override the exit status |
979 | passed to us. */ | |
980 | if (signal_is_trapped (0)) | |
981 | s = run_exit_trap (); | |
982 | ||
983 | #if defined (PROCESS_SUBSTITUTION) | |
8868edaf | 984 | unlink_all_fifos (); |
ccc6cda3 | 985 | #endif /* PROCESS_SUBSTITUTION */ |
726f6388 | 986 | |
726f6388 | 987 | #if defined (HISTORY) |
ac50fbac | 988 | if (remember_on_history) |
ccc6cda3 | 989 | maybe_save_shell_history (); |
726f6388 | 990 | #endif /* HISTORY */ |
ccc6cda3 | 991 | |
3185942a JA |
992 | #if defined (COPROCESS_SUPPORT) |
993 | coproc_flush (); | |
994 | #endif | |
995 | ||
726f6388 | 996 | #if defined (JOB_CONTROL) |
cce855bc JA |
997 | /* If the user has run `shopt -s huponexit', hangup all jobs when we exit |
998 | an interactive login shell. ksh does this unconditionally. */ | |
999 | if (interactive_shell && login_shell && hup_on_exit) | |
1000 | hangup_all_jobs (); | |
1001 | ||
a0c0a00f CR |
1002 | /* If this shell is interactive, or job control is active, terminate all |
1003 | stopped jobs and restore the original terminal process group. Don't do | |
1004 | this if we're in a subshell and calling exit_shell after, for example, | |
1005 | a failed word expansion. We want to do this even if the shell is not | |
1006 | interactive because we set the terminal's process group when job control | |
1007 | is enabled regardless of the interactive status. */ | |
28ef6c31 JA |
1008 | if (subshell_environment == 0) |
1009 | end_job_control (); | |
726f6388 JA |
1010 | #endif /* JOB_CONTROL */ |
1011 | ||
1012 | /* Always return the exit status of the last command to our parent. */ | |
7117c2d2 | 1013 | sh_exit (s); |
726f6388 JA |
1014 | } |
1015 | ||
bb70624e JA |
1016 | /* A wrapper for exit that (optionally) can do other things, like malloc |
1017 | statistics tracing. */ | |
1018 | void | |
1019 | sh_exit (s) | |
1020 | int s; | |
1021 | { | |
7117c2d2 | 1022 | #if defined (MALLOC_DEBUG) && defined (USING_BASH_MALLOC) |
d233b485 | 1023 | if (malloc_trace_at_exit && (subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB)) == 0) |
7117c2d2 | 1024 | trace_malloc_stats (get_name_for_error (), (char *)NULL); |
a0c0a00f | 1025 | /* mlocation_write_table (); */ |
7117c2d2 JA |
1026 | #endif |
1027 | ||
bb70624e JA |
1028 | exit (s); |
1029 | } | |
1030 | ||
ac50fbac CR |
1031 | /* Exit a subshell, which includes calling the exit trap. We don't want to |
1032 | do any more cleanup, since a subshell is created as an exact copy of its | |
1033 | parent. */ | |
1034 | void | |
1035 | subshell_exit (s) | |
1036 | int s; | |
1037 | { | |
1038 | fflush (stdout); | |
1039 | fflush (stderr); | |
1040 | ||
1041 | /* Do trap[0] if defined. Allow it to override the exit status | |
1042 | passed to us. */ | |
1043 | if (signal_is_trapped (0)) | |
1044 | s = run_exit_trap (); | |
1045 | ||
1046 | sh_exit (s); | |
1047 | } | |
1048 | ||
8868edaf CR |
1049 | void |
1050 | set_exit_status (s) | |
1051 | int s; | |
1052 | { | |
1053 | set_pipestatus_from_exit (last_command_exit_value = s); | |
1054 | } | |
1055 | ||
726f6388 JA |
1056 | /* Source the bash startup files. If POSIXLY_CORRECT is non-zero, we obey |
1057 | the Posix.2 startup file rules: $ENV is expanded, and if the file it | |
1058 | names exists, that file is sourced. The Posix.2 rules are in effect | |
ccc6cda3 | 1059 | for interactive shells only. (section 4.56.5.3) */ |
726f6388 | 1060 | |
ccc6cda3 JA |
1061 | /* Execute ~/.bashrc for most shells. Never execute it if |
1062 | ACT_LIKE_SH is set, or if NO_RC is set. | |
726f6388 | 1063 | |
ccc6cda3 | 1064 | If the executable file "/usr/gnu/src/bash/foo" contains: |
726f6388 | 1065 | |
ccc6cda3 JA |
1066 | #!/usr/gnu/bin/bash |
1067 | echo hello | |
726f6388 | 1068 | |
ccc6cda3 | 1069 | then: |
726f6388 | 1070 | |
28ef6c31 JA |
1071 | COMMAND EXECUTE BASHRC |
1072 | -------------------------------- | |
1073 | bash -c foo NO | |
1074 | bash foo NO | |
1075 | foo NO | |
1076 | rsh machine ls YES (for rsh, which calls `bash -c') | |
1077 | rsh machine foo YES (for shell started by rsh) NO (for foo!) | |
1078 | echo ls | bash NO | |
1079 | login NO | |
1080 | bash YES | |
ccc6cda3 JA |
1081 | */ |
1082 | ||
1083 | static void | |
1084 | execute_env_file (env_file) | |
1085 | char *env_file; | |
1086 | { | |
1087 | char *fn; | |
ccc6cda3 JA |
1088 | |
1089 | if (env_file && *env_file) | |
1090 | { | |
f73dda09 JA |
1091 | fn = expand_string_unsplit_to_string (env_file, Q_DOUBLE_QUOTES); |
1092 | if (fn && *fn) | |
1093 | maybe_execute_file (fn, 1); | |
1094 | FREE (fn); | |
726f6388 | 1095 | } |
ccc6cda3 | 1096 | } |
726f6388 | 1097 | |
ccc6cda3 JA |
1098 | static void |
1099 | run_startup_files () | |
1100 | { | |
d166f048 JA |
1101 | #if defined (JOB_CONTROL) |
1102 | int old_job_control; | |
1103 | #endif | |
cce855bc | 1104 | int sourced_login, run_by_ssh; |
d166f048 | 1105 | |
cce855bc | 1106 | /* get the rshd/sshd case out of the way first. */ |
ccc6cda3 | 1107 | if (interactive_shell == 0 && no_rc == 0 && login_shell == 0 && |
b80f6443 | 1108 | act_like_sh == 0 && command_execution_string) |
726f6388 | 1109 | { |
f73dda09 JA |
1110 | #ifdef SSH_SOURCE_BASHRC |
1111 | run_by_ssh = (find_variable ("SSH_CLIENT") != (SHELL_VAR *)0) || | |
1112 | (find_variable ("SSH2_CLIENT") != (SHELL_VAR *)0); | |
1113 | #else | |
1114 | run_by_ssh = 0; | |
1115 | #endif | |
cce855bc JA |
1116 | |
1117 | /* If we were run by sshd or we think we were run by rshd, execute | |
bb70624e JA |
1118 | ~/.bashrc if we are a top-level shell. */ |
1119 | if ((run_by_ssh || isnetconn (fileno (stdin))) && shell_level < 2) | |
cce855bc | 1120 | { |
ccc6cda3 | 1121 | #ifdef SYS_BASHRC |
b72432fd JA |
1122 | # if defined (__OPENNT) |
1123 | maybe_execute_file (_prefixInstallPath(SYS_BASHRC, NULL, 0), 1); | |
1124 | # else | |
cce855bc | 1125 | maybe_execute_file (SYS_BASHRC, 1); |
b72432fd | 1126 | # endif |
ccc6cda3 | 1127 | #endif |
cce855bc JA |
1128 | maybe_execute_file (bashrc_file, 1); |
1129 | return; | |
1130 | } | |
ccc6cda3 | 1131 | } |
726f6388 | 1132 | |
cce855bc JA |
1133 | #if defined (JOB_CONTROL) |
1134 | /* Startup files should be run without job control enabled. */ | |
1135 | old_job_control = interactive_shell ? set_job_control (0) : 0; | |
1136 | #endif | |
1137 | ||
1138 | sourced_login = 0; | |
1139 | ||
7117c2d2 JA |
1140 | /* A shell begun with the --login (or -l) flag that is not in posix mode |
1141 | runs the login shell startup files, no matter whether or not it is | |
bb70624e JA |
1142 | interactive. If NON_INTERACTIVE_LOGIN_SHELLS is defined, run the |
1143 | startup files if argv[0][0] == '-' as well. */ | |
1144 | #if defined (NON_INTERACTIVE_LOGIN_SHELLS) | |
1145 | if (login_shell && posixly_correct == 0) | |
1146 | #else | |
1147 | if (login_shell < 0 && posixly_correct == 0) | |
1148 | #endif | |
cce855bc JA |
1149 | { |
1150 | /* We don't execute .bashrc for login shells. */ | |
1151 | no_rc++; | |
1152 | ||
1153 | /* Execute /etc/profile and one of the personal login shell | |
1154 | initialization files. */ | |
1155 | if (no_profile == 0) | |
1156 | { | |
1157 | maybe_execute_file (SYS_PROFILE, 1); | |
1158 | ||
1159 | if (act_like_sh) /* sh */ | |
1160 | maybe_execute_file ("~/.profile", 1); | |
1161 | else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) && | |
1162 | (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */ | |
1163 | maybe_execute_file ("~/.profile", 1); | |
1164 | } | |
1165 | ||
1166 | sourced_login = 1; | |
1167 | } | |
cce855bc | 1168 | |
ccc6cda3 JA |
1169 | /* A non-interactive shell not named `sh' and not in posix mode reads and |
1170 | executes commands from $BASH_ENV. If `su' starts a shell with `-c cmd' | |
1171 | and `-su' as the name of the shell, we want to read the startup files. | |
1172 | No other non-interactive shells read any startup files. */ | |
1173 | if (interactive_shell == 0 && !(su_shell && login_shell)) | |
1174 | { | |
1175 | if (posixly_correct == 0 && act_like_sh == 0 && privileged_mode == 0 && | |
1176 | sourced_env++ == 0) | |
1177 | execute_env_file (get_string_value ("BASH_ENV")); | |
1178 | return; | |
1179 | } | |
726f6388 | 1180 | |
ccc6cda3 JA |
1181 | /* Interactive shell or `-su' shell. */ |
1182 | if (posixly_correct == 0) /* bash, sh */ | |
1183 | { | |
cce855bc JA |
1184 | if (login_shell && sourced_login++ == 0) |
1185 | { | |
1186 | /* We don't execute .bashrc for login shells. */ | |
1187 | no_rc++; | |
726f6388 | 1188 | |
cce855bc JA |
1189 | /* Execute /etc/profile and one of the personal login shell |
1190 | initialization files. */ | |
1191 | if (no_profile == 0) | |
1192 | { | |
1193 | maybe_execute_file (SYS_PROFILE, 1); | |
726f6388 | 1194 | |
cce855bc JA |
1195 | if (act_like_sh) /* sh */ |
1196 | maybe_execute_file ("~/.profile", 1); | |
1197 | else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) && | |
1198 | (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */ | |
1199 | maybe_execute_file ("~/.profile", 1); | |
1200 | } | |
1201 | } | |
726f6388 | 1202 | |
ccc6cda3 JA |
1203 | /* bash */ |
1204 | if (act_like_sh == 0 && no_rc == 0) | |
1205 | { | |
1206 | #ifdef SYS_BASHRC | |
b72432fd JA |
1207 | # if defined (__OPENNT) |
1208 | maybe_execute_file (_prefixInstallPath(SYS_BASHRC, NULL, 0), 1); | |
1209 | # else | |
ccc6cda3 | 1210 | maybe_execute_file (SYS_BASHRC, 1); |
bb70624e | 1211 | # endif |
ccc6cda3 | 1212 | #endif |
28ef6c31 | 1213 | maybe_execute_file (bashrc_file, 1); |
726f6388 | 1214 | } |
ccc6cda3 JA |
1215 | /* sh */ |
1216 | else if (act_like_sh && privileged_mode == 0 && sourced_env++ == 0) | |
28ef6c31 | 1217 | execute_env_file (get_string_value ("ENV")); |
ccc6cda3 JA |
1218 | } |
1219 | else /* bash --posix, sh --posix */ | |
1220 | { | |
1221 | /* bash and sh */ | |
1222 | if (interactive_shell && privileged_mode == 0 && sourced_env++ == 0) | |
28ef6c31 | 1223 | execute_env_file (get_string_value ("ENV")); |
726f6388 | 1224 | } |
d166f048 JA |
1225 | |
1226 | #if defined (JOB_CONTROL) | |
1227 | set_job_control (old_job_control); | |
1228 | #endif | |
726f6388 JA |
1229 | } |
1230 | ||
1231 | #if defined (RESTRICTED_SHELL) | |
b72432fd JA |
1232 | /* Return 1 if the shell should be a restricted one based on NAME or the |
1233 | value of `restricted'. Don't actually do anything, just return a | |
1234 | boolean value. */ | |
1235 | int | |
1236 | shell_is_restricted (name) | |
1237 | char *name; | |
1238 | { | |
1239 | char *temp; | |
1240 | ||
1241 | if (restricted) | |
1242 | return 1; | |
1243 | temp = base_pathname (name); | |
95732b49 JA |
1244 | if (*temp == '-') |
1245 | temp++; | |
b72432fd JA |
1246 | return (STREQ (temp, RESTRICTED_SHELL_NAME)); |
1247 | } | |
1248 | ||
ccc6cda3 JA |
1249 | /* Perhaps make this shell a `restricted' one, based on NAME. If the |
1250 | basename of NAME is "rbash", then this shell is restricted. The | |
1251 | name of the restricted shell is a configurable option, see config.h. | |
b72432fd JA |
1252 | In a restricted shell, PATH, SHELL, ENV, and BASH_ENV are read-only |
1253 | and non-unsettable. | |
726f6388 JA |
1254 | Do this also if `restricted' is already set to 1; maybe the shell was |
1255 | started with -r. */ | |
ccc6cda3 | 1256 | int |
726f6388 JA |
1257 | maybe_make_restricted (name) |
1258 | char *name; | |
1259 | { | |
1260 | char *temp; | |
1261 | ||
7117c2d2 | 1262 | temp = base_pathname (name); |
b80f6443 JA |
1263 | if (*temp == '-') |
1264 | temp++; | |
ccc6cda3 | 1265 | if (restricted || (STREQ (temp, RESTRICTED_SHELL_NAME))) |
726f6388 | 1266 | { |
d233b485 CR |
1267 | #if defined (RBASH_STATIC_PATH_VALUE) |
1268 | bind_variable ("PATH", RBASH_STATIC_PATH_VALUE, 0); | |
1269 | stupidly_hack_special_variables ("PATH"); /* clear hash table */ | |
1270 | #endif | |
726f6388 | 1271 | set_var_read_only ("PATH"); |
726f6388 | 1272 | set_var_read_only ("SHELL"); |
b72432fd JA |
1273 | set_var_read_only ("ENV"); |
1274 | set_var_read_only ("BASH_ENV"); | |
8868edaf | 1275 | set_var_read_only ("HISTFILE"); |
28ef6c31 | 1276 | restricted = 1; |
726f6388 | 1277 | } |
ccc6cda3 | 1278 | return (restricted); |
726f6388 JA |
1279 | } |
1280 | #endif /* RESTRICTED_SHELL */ | |
1281 | ||
ccc6cda3 JA |
1282 | /* Fetch the current set of uids and gids and return 1 if we're running |
1283 | setuid or setgid. */ | |
1284 | static int | |
1285 | uidget () | |
726f6388 | 1286 | { |
ccc6cda3 | 1287 | uid_t u; |
726f6388 | 1288 | |
ccc6cda3 JA |
1289 | u = getuid (); |
1290 | if (current_user.uid != u) | |
726f6388 | 1291 | { |
ccc6cda3 JA |
1292 | FREE (current_user.user_name); |
1293 | FREE (current_user.shell); | |
1294 | FREE (current_user.home_dir); | |
1295 | current_user.user_name = current_user.shell = current_user.home_dir = (char *)NULL; | |
726f6388 | 1296 | } |
ccc6cda3 JA |
1297 | current_user.uid = u; |
1298 | current_user.gid = getgid (); | |
1299 | current_user.euid = geteuid (); | |
1300 | current_user.egid = getegid (); | |
726f6388 | 1301 | |
ccc6cda3 JA |
1302 | /* See whether or not we are running setuid or setgid. */ |
1303 | return (current_user.uid != current_user.euid) || | |
1304 | (current_user.gid != current_user.egid); | |
1305 | } | |
726f6388 | 1306 | |
ccc6cda3 JA |
1307 | void |
1308 | disable_priv_mode () | |
1309 | { | |
a0c0a00f CR |
1310 | int e; |
1311 | ||
8868edaf CR |
1312 | #if HAVE_SETRESUID |
1313 | if (setresuid (current_user.uid, current_user.uid, current_user.uid) < 0) | |
1314 | #else | |
a0c0a00f | 1315 | if (setuid (current_user.uid) < 0) |
8868edaf | 1316 | #endif |
a0c0a00f CR |
1317 | { |
1318 | e = errno; | |
1319 | sys_error (_("cannot set uid to %d: effective uid %d"), current_user.uid, current_user.euid); | |
1320 | #if defined (EXIT_ON_SETUID_FAILURE) | |
1321 | if (e == EAGAIN) | |
1322 | exit (e); | |
1323 | #endif | |
1324 | } | |
8868edaf CR |
1325 | #if HAVE_SETRESGID |
1326 | if (setresgid (current_user.gid, current_user.gid, current_user.gid) < 0) | |
1327 | #else | |
a0c0a00f | 1328 | if (setgid (current_user.gid) < 0) |
8868edaf | 1329 | #endif |
a0c0a00f CR |
1330 | sys_error (_("cannot set gid to %d: effective gid %d"), current_user.gid, current_user.egid); |
1331 | ||
ccc6cda3 JA |
1332 | current_user.euid = current_user.uid; |
1333 | current_user.egid = current_user.gid; | |
726f6388 JA |
1334 | } |
1335 | ||
0001803f | 1336 | #if defined (WORDEXP_OPTION) |
cce855bc JA |
1337 | static int |
1338 | run_wordexp (words) | |
1339 | char *words; | |
1340 | { | |
1341 | int code, nw, nb; | |
b80f6443 | 1342 | WORD_LIST *wl, *tl, *result; |
cce855bc | 1343 | |
ac50fbac | 1344 | code = setjmp_nosigs (top_level); |
cce855bc JA |
1345 | |
1346 | if (code != NOT_JUMPED) | |
1347 | { | |
1348 | switch (code) | |
1349 | { | |
ac50fbac | 1350 | /* Some kind of throw to top_level has occurred. */ |
cce855bc JA |
1351 | case FORCE_EOF: |
1352 | return last_command_exit_value = 127; | |
b80f6443 | 1353 | case ERREXIT: |
cce855bc JA |
1354 | case EXITPROG: |
1355 | return last_command_exit_value; | |
1356 | case DISCARD: | |
1357 | return last_command_exit_value = 1; | |
1358 | default: | |
b72432fd | 1359 | command_error ("run_wordexp", CMDERR_BADJUMP, code, 0); |
cce855bc JA |
1360 | } |
1361 | } | |
1362 | ||
1363 | /* Run it through the parser to get a list of words and expand them */ | |
1364 | if (words && *words) | |
1365 | { | |
1366 | with_input_from_string (words, "--wordexp"); | |
1367 | if (parse_command () != 0) | |
28ef6c31 | 1368 | return (126); |
cce855bc JA |
1369 | if (global_command == 0) |
1370 | { | |
1371 | printf ("0\n0\n"); | |
1372 | return (0); | |
1373 | } | |
1374 | if (global_command->type != cm_simple) | |
28ef6c31 | 1375 | return (126); |
cce855bc | 1376 | wl = global_command->value.Simple->words; |
b80f6443 JA |
1377 | if (protected_mode) |
1378 | for (tl = wl; tl; tl = tl->next) | |
0628567a | 1379 | tl->word->flags |= W_NOCOMSUB|W_NOPROCSUB; |
cce855bc JA |
1380 | result = wl ? expand_words_no_vars (wl) : (WORD_LIST *)0; |
1381 | } | |
1382 | else | |
1383 | result = (WORD_LIST *)0; | |
1384 | ||
1385 | last_command_exit_value = 0; | |
1386 | ||
1387 | if (result == 0) | |
1388 | { | |
1389 | printf ("0\n0\n"); | |
1390 | return (0); | |
1391 | } | |
1392 | ||
1393 | /* Count up the number of words and bytes, and print them. Don't count | |
1394 | the trailing NUL byte. */ | |
1395 | for (nw = nb = 0, wl = result; wl; wl = wl->next) | |
1396 | { | |
1397 | nw++; | |
1398 | nb += strlen (wl->word->word); | |
1399 | } | |
1400 | printf ("%u\n%u\n", nw, nb); | |
1401 | /* Print each word on a separate line. This will have to be changed when | |
1402 | the interface to glibc is completed. */ | |
1403 | for (wl = result; wl; wl = wl->next) | |
1404 | printf ("%s\n", wl->word->word); | |
1405 | ||
1406 | return (0); | |
1407 | } | |
0001803f | 1408 | #endif |
cce855bc | 1409 | |
726f6388 JA |
1410 | #if defined (ONESHOT) |
1411 | /* Run one command, given as the argument to the -c option. Tell | |
1412 | parse_and_execute not to fork for a simple command. */ | |
ccc6cda3 | 1413 | static int |
726f6388 JA |
1414 | run_one_command (command) |
1415 | char *command; | |
1416 | { | |
1417 | int code; | |
1418 | ||
ac50fbac | 1419 | code = setjmp_nosigs (top_level); |
726f6388 JA |
1420 | |
1421 | if (code != NOT_JUMPED) | |
1422 | { | |
1423 | #if defined (PROCESS_SUBSTITUTION) | |
1424 | unlink_fifo_list (); | |
1425 | #endif /* PROCESS_SUBSTITUTION */ | |
1426 | switch (code) | |
1427 | { | |
ac50fbac | 1428 | /* Some kind of throw to top_level has occurred. */ |
726f6388 JA |
1429 | case FORCE_EOF: |
1430 | return last_command_exit_value = 127; | |
b80f6443 | 1431 | case ERREXIT: |
726f6388 JA |
1432 | case EXITPROG: |
1433 | return last_command_exit_value; | |
1434 | case DISCARD: | |
1435 | return last_command_exit_value = 1; | |
1436 | default: | |
b72432fd | 1437 | command_error ("run_one_command", CMDERR_BADJUMP, code, 0); |
726f6388 JA |
1438 | } |
1439 | } | |
8868edaf | 1440 | return (parse_and_execute (savestring (command), "-c", SEVAL_NOHIST|SEVAL_RESETLINE)); |
726f6388 JA |
1441 | } |
1442 | #endif /* ONESHOT */ | |
1443 | ||
ccc6cda3 JA |
1444 | static int |
1445 | bind_args (argv, arg_start, arg_end, start_index) | |
1446 | char **argv; | |
1447 | int arg_start, arg_end, start_index; | |
726f6388 | 1448 | { |
ccc6cda3 | 1449 | register int i; |
d233b485 CR |
1450 | WORD_LIST *args, *tl; |
1451 | ||
1452 | for (i = arg_start, args = tl = (WORD_LIST *)NULL; i < arg_end; i++) | |
1453 | { | |
1454 | if (args == 0) | |
1455 | args = tl = make_word_list (make_word (argv[i]), args); | |
1456 | else | |
1457 | { | |
1458 | tl->next = make_word_list (make_word (argv[i]), (WORD_LIST *)NULL); | |
1459 | tl = tl->next; | |
1460 | } | |
1461 | } | |
726f6388 | 1462 | |
ccc6cda3 | 1463 | if (args) |
726f6388 | 1464 | { |
ccc6cda3 | 1465 | if (start_index == 0) /* bind to $0...$n for sh -c command */ |
726f6388 | 1466 | { |
ccc6cda3 JA |
1467 | /* Posix.2 4.56.3 says that the first argument after sh -c command |
1468 | becomes $0, and the rest of the arguments become $1...$n */ | |
1469 | shell_name = savestring (args->word->word); | |
d166f048 | 1470 | FREE (dollar_vars[0]); |
ccc6cda3 JA |
1471 | dollar_vars[0] = savestring (args->word->word); |
1472 | remember_args (args->next, 1); | |
d233b485 CR |
1473 | if (debugging_mode) |
1474 | { | |
1475 | push_args (args->next); /* BASH_ARGV and BASH_ARGC */ | |
1476 | bash_argv_initialized = 1; | |
1477 | } | |
726f6388 | 1478 | } |
ccc6cda3 | 1479 | else /* bind to $1...$n for shell script */ |
b80f6443 JA |
1480 | { |
1481 | remember_args (args, 1); | |
d233b485 CR |
1482 | /* We do this unconditionally so something like -O extdebug doesn't |
1483 | do it first. We're setting the definitive positional params | |
1484 | here. */ | |
1485 | if (debugging_mode) | |
1486 | { | |
1487 | push_args (args); /* BASH_ARGV and BASH_ARGC */ | |
1488 | bash_argv_initialized = 1; | |
1489 | } | |
b80f6443 | 1490 | } |
726f6388 | 1491 | |
ccc6cda3 JA |
1492 | dispose_words (args); |
1493 | } | |
726f6388 | 1494 | |
ccc6cda3 JA |
1495 | return (i); |
1496 | } | |
726f6388 | 1497 | |
ccc6cda3 JA |
1498 | void |
1499 | unbind_args () | |
1500 | { | |
1501 | remember_args ((WORD_LIST *)NULL, 1); | |
b80f6443 JA |
1502 | pop_args (); /* Reset BASH_ARGV and BASH_ARGC */ |
1503 | } | |
1504 | ||
1505 | static void | |
1506 | start_debugger () | |
1507 | { | |
1508 | #if defined (DEBUGGER) && defined (DEBUGGER_START_FILE) | |
1509 | int old_errexit; | |
a0c0a00f | 1510 | int r; |
b80f6443 JA |
1511 | |
1512 | old_errexit = exit_immediately_on_error; | |
1513 | exit_immediately_on_error = 0; | |
1514 | ||
a0c0a00f CR |
1515 | r = force_execute_file (DEBUGGER_START_FILE, 1); |
1516 | if (r < 0) | |
1517 | { | |
1518 | internal_warning (_("cannot start debugger; debugging mode disabled")); | |
1519 | debugging_mode = 0; | |
1520 | } | |
1521 | error_trace_mode = function_trace_mode = debugging_mode; | |
1522 | ||
1523 | set_shellopts (); | |
1524 | set_bashopts (); | |
b80f6443 JA |
1525 | |
1526 | exit_immediately_on_error += old_errexit; | |
1527 | #endif | |
ccc6cda3 | 1528 | } |
726f6388 | 1529 | |
ccc6cda3 JA |
1530 | static int |
1531 | open_shell_script (script_name) | |
1532 | char *script_name; | |
1533 | { | |
28ef6c31 | 1534 | int fd, e, fd_is_tty; |
b80f6443 | 1535 | char *filename, *path_filename, *t; |
f73dda09 | 1536 | char sample[80]; |
ccc6cda3 | 1537 | int sample_len; |
d166f048 | 1538 | struct stat sb; |
b80f6443 JA |
1539 | #if defined (ARRAY_VARS) |
1540 | SHELL_VAR *funcname_v, *bash_source_v, *bash_lineno_v; | |
1541 | ARRAY *funcname_a, *bash_source_a, *bash_lineno_a; | |
1542 | #endif | |
726f6388 | 1543 | |
ccc6cda3 | 1544 | filename = savestring (script_name); |
726f6388 | 1545 | |
ccc6cda3 JA |
1546 | fd = open (filename, O_RDONLY); |
1547 | if ((fd < 0) && (errno == ENOENT) && (absolute_program (filename) == 0)) | |
1548 | { | |
d166f048 | 1549 | e = errno; |
ccc6cda3 JA |
1550 | /* If it's not in the current directory, try looking through PATH |
1551 | for it. */ | |
1552 | path_filename = find_path_file (script_name); | |
1553 | if (path_filename) | |
726f6388 | 1554 | { |
ccc6cda3 JA |
1555 | free (filename); |
1556 | filename = path_filename; | |
1557 | fd = open (filename, O_RDONLY); | |
726f6388 | 1558 | } |
d166f048 JA |
1559 | else |
1560 | errno = e; | |
726f6388 | 1561 | } |
726f6388 | 1562 | |
ccc6cda3 JA |
1563 | if (fd < 0) |
1564 | { | |
d166f048 | 1565 | e = errno; |
ccc6cda3 | 1566 | file_error (filename); |
d233b485 CR |
1567 | #if defined (JOB_CONTROL) |
1568 | end_job_control (); /* just in case we were run as bash -i script */ | |
1569 | #endif | |
a0c0a00f | 1570 | sh_exit ((e == ENOENT) ? EX_NOTFOUND : EX_NOINPUT); |
ccc6cda3 | 1571 | } |
726f6388 | 1572 | |
b80f6443 | 1573 | free (dollar_vars[0]); |
495aee44 CR |
1574 | dollar_vars[0] = exec_argv0 ? savestring (exec_argv0) : savestring (script_name); |
1575 | if (exec_argv0) | |
1576 | { | |
1577 | free (exec_argv0); | |
1578 | exec_argv0 = (char *)NULL; | |
1579 | } | |
b80f6443 | 1580 | |
a0c0a00f CR |
1581 | if (file_isdir (filename)) |
1582 | { | |
1583 | #if defined (EISDIR) | |
1584 | errno = EISDIR; | |
1585 | #else | |
1586 | errno = EINVAL; | |
1587 | #endif | |
1588 | file_error (filename); | |
d233b485 CR |
1589 | #if defined (JOB_CONTROL) |
1590 | end_job_control (); /* just in case we were run as bash -i script */ | |
1591 | #endif | |
a0c0a00f CR |
1592 | sh_exit (EX_NOINPUT); |
1593 | } | |
1594 | ||
b80f6443 JA |
1595 | #if defined (ARRAY_VARS) |
1596 | GET_ARRAY_FROM_VAR ("FUNCNAME", funcname_v, funcname_a); | |
1597 | GET_ARRAY_FROM_VAR ("BASH_SOURCE", bash_source_v, bash_source_a); | |
1598 | GET_ARRAY_FROM_VAR ("BASH_LINENO", bash_lineno_v, bash_lineno_a); | |
1599 | ||
1600 | array_push (bash_source_a, filename); | |
1601 | if (bash_lineno_a) | |
1602 | { | |
1603 | t = itos (executing_line_number ()); | |
1604 | array_push (bash_lineno_a, t); | |
1605 | free (t); | |
1606 | } | |
1607 | array_push (funcname_a, "main"); | |
1608 | #endif | |
1609 | ||
28ef6c31 JA |
1610 | #ifdef HAVE_DEV_FD |
1611 | fd_is_tty = isatty (fd); | |
1612 | #else | |
1613 | fd_is_tty = 0; | |
1614 | #endif | |
1615 | ||
1616 | /* Only do this with non-tty file descriptors we can seek on. */ | |
1617 | if (fd_is_tty == 0 && (lseek (fd, 0L, 1) != -1)) | |
ccc6cda3 JA |
1618 | { |
1619 | /* Check to see if the `file' in `bash file' is a binary file | |
1620 | according to the same tests done by execute_simple_command (), | |
1621 | and report an error and exit if it is. */ | |
1622 | sample_len = read (fd, sample, sizeof (sample)); | |
d166f048 JA |
1623 | if (sample_len < 0) |
1624 | { | |
1625 | e = errno; | |
1626 | if ((fstat (fd, &sb) == 0) && S_ISDIR (sb.st_mode)) | |
a0c0a00f CR |
1627 | { |
1628 | #if defined (EISDIR) | |
1629 | errno = EISDIR; | |
1630 | file_error (filename); | |
1631 | #else | |
1632 | internal_error (_("%s: Is a directory"), filename); | |
1633 | #endif | |
1634 | } | |
28ef6c31 | 1635 | else |
d166f048 JA |
1636 | { |
1637 | errno = e; | |
1638 | file_error (filename); | |
1639 | } | |
d233b485 CR |
1640 | #if defined (JOB_CONTROL) |
1641 | end_job_control (); /* just in case we were run as bash -i script */ | |
1642 | #endif | |
d166f048 JA |
1643 | exit (EX_NOEXEC); |
1644 | } | |
1645 | else if (sample_len > 0 && (check_binary_file (sample, sample_len))) | |
ccc6cda3 | 1646 | { |
3185942a | 1647 | internal_error (_("%s: cannot execute binary file"), filename); |
d233b485 CR |
1648 | #if defined (JOB_CONTROL) |
1649 | end_job_control (); /* just in case we were run as bash -i script */ | |
1650 | #endif | |
ccc6cda3 JA |
1651 | exit (EX_BINARY_FILE); |
1652 | } | |
1653 | /* Now rewind the file back to the beginning. */ | |
1654 | lseek (fd, 0L, 0); | |
1655 | } | |
726f6388 | 1656 | |
bb70624e JA |
1657 | /* Open the script. But try to move the file descriptor to a randomly |
1658 | large one, in the hopes that any descriptors used by the script will | |
1659 | not match with ours. */ | |
3185942a | 1660 | fd = move_to_high_fd (fd, 1, -1); |
bb70624e | 1661 | |
ccc6cda3 JA |
1662 | #if defined (BUFFERED_INPUT) |
1663 | default_buffered_input = fd; | |
ccc6cda3 JA |
1664 | SET_CLOSE_ON_EXEC (default_buffered_input); |
1665 | #else /* !BUFFERED_INPUT */ | |
ccc6cda3 | 1666 | default_input = fdopen (fd, "r"); |
726f6388 | 1667 | |
ccc6cda3 JA |
1668 | if (default_input == 0) |
1669 | { | |
1670 | file_error (filename); | |
1671 | exit (EX_NOTFOUND); | |
1672 | } | |
726f6388 | 1673 | |
ccc6cda3 JA |
1674 | SET_CLOSE_ON_EXEC (fd); |
1675 | if (fileno (default_input) != fd) | |
1676 | SET_CLOSE_ON_EXEC (fileno (default_input)); | |
1677 | #endif /* !BUFFERED_INPUT */ | |
726f6388 | 1678 | |
28ef6c31 JA |
1679 | /* Just about the only way for this code to be executed is if something |
1680 | like `bash -i /dev/stdin' is executed. */ | |
1681 | if (interactive_shell && fd_is_tty) | |
ccc6cda3 | 1682 | { |
ccc6cda3 JA |
1683 | dup2 (fd, 0); |
1684 | close (fd); | |
1685 | fd = 0; | |
1686 | #if defined (BUFFERED_INPUT) | |
1687 | default_buffered_input = 0; | |
1688 | #else | |
1689 | fclose (default_input); | |
1690 | default_input = stdin; | |
1691 | #endif | |
1692 | } | |
f73dda09 JA |
1693 | else if (forced_interactive && fd_is_tty == 0) |
1694 | /* But if a script is called with something like `bash -i scriptname', | |
1695 | we need to do a non-interactive setup here, since we didn't do it | |
1696 | before. */ | |
3185942a | 1697 | init_interactive_script (); |
28ef6c31 | 1698 | |
ccc6cda3 | 1699 | free (filename); |
a0c0a00f CR |
1700 | |
1701 | reading_shell_script = 1; | |
ccc6cda3 | 1702 | return (fd); |
726f6388 JA |
1703 | } |
1704 | ||
ccc6cda3 JA |
1705 | /* Initialize the input routines for the parser. */ |
1706 | static void | |
1707 | set_bash_input () | |
726f6388 | 1708 | { |
ccc6cda3 JA |
1709 | /* Make sure the fd from which we are reading input is not in |
1710 | no-delay mode. */ | |
1711 | #if defined (BUFFERED_INPUT) | |
1712 | if (interactive == 0) | |
28ef6c31 | 1713 | sh_unset_nodelay_mode (default_buffered_input); |
ccc6cda3 JA |
1714 | else |
1715 | #endif /* !BUFFERED_INPUT */ | |
28ef6c31 | 1716 | sh_unset_nodelay_mode (fileno (stdin)); |
726f6388 | 1717 | |
ccc6cda3 JA |
1718 | /* with_input_from_stdin really means `with_input_from_readline' */ |
1719 | if (interactive && no_line_editing == 0) | |
1720 | with_input_from_stdin (); | |
ccc6cda3 | 1721 | #if defined (BUFFERED_INPUT) |
95732b49 JA |
1722 | else if (interactive == 0) |
1723 | with_input_from_buffered_stream (default_buffered_input, dollar_vars[0]); | |
1724 | #endif /* BUFFERED_INPUT */ | |
1725 | else | |
ccc6cda3 | 1726 | with_input_from_stream (default_input, dollar_vars[0]); |
726f6388 JA |
1727 | } |
1728 | ||
cce855bc JA |
1729 | /* Close the current shell script input source and forget about it. This is |
1730 | extern so execute_cmd.c:initialize_subshell() can call it. If CHECK_ZERO | |
1731 | is non-zero, we close default_buffered_input even if it's the standard | |
1732 | input (fd 0). */ | |
1733 | void | |
1734 | unset_bash_input (check_zero) | |
1735 | int check_zero; | |
1736 | { | |
1737 | #if defined (BUFFERED_INPUT) | |
1738 | if ((check_zero && default_buffered_input >= 0) || | |
1739 | (check_zero == 0 && default_buffered_input > 0)) | |
1740 | { | |
1741 | close_buffered_fd (default_buffered_input); | |
1742 | default_buffered_input = bash_input.location.buffered_fd = -1; | |
3185942a | 1743 | bash_input.type = st_none; /* XXX */ |
cce855bc JA |
1744 | } |
1745 | #else /* !BUFFERED_INPUT */ | |
1746 | if (default_input) | |
1747 | { | |
1748 | fclose (default_input); | |
1749 | default_input = (FILE *)NULL; | |
1750 | } | |
1751 | #endif /* !BUFFERED_INPUT */ | |
1752 | } | |
1753 | ||
1754 | ||
ccc6cda3 JA |
1755 | #if !defined (PROGRAM) |
1756 | # define PROGRAM "bash" | |
1757 | #endif | |
1758 | ||
1759 | static void | |
1760 | set_shell_name (argv0) | |
1761 | char *argv0; | |
726f6388 | 1762 | { |
ccc6cda3 JA |
1763 | /* Here's a hack. If the name of this shell is "sh", then don't do |
1764 | any startup files; just try to be more like /bin/sh. */ | |
95732b49 | 1765 | shell_name = argv0 ? base_pathname (argv0) : PROGRAM; |
7117c2d2 | 1766 | |
0628567a | 1767 | if (argv0 && *argv0 == '-') |
7117c2d2 | 1768 | { |
0628567a JA |
1769 | if (*shell_name == '-') |
1770 | shell_name++; | |
ac50fbac | 1771 | login_shell = 1; |
7117c2d2 JA |
1772 | } |
1773 | ||
ccc6cda3 JA |
1774 | if (shell_name[0] == 's' && shell_name[1] == 'h' && shell_name[2] == '\0') |
1775 | act_like_sh++; | |
1776 | if (shell_name[0] == 's' && shell_name[1] == 'u' && shell_name[2] == '\0') | |
1777 | su_shell++; | |
726f6388 | 1778 | |
95732b49 | 1779 | shell_name = argv0 ? argv0 : PROGRAM; |
ccc6cda3 JA |
1780 | FREE (dollar_vars[0]); |
1781 | dollar_vars[0] = savestring (shell_name); | |
726f6388 | 1782 | |
ccc6cda3 JA |
1783 | /* A program may start an interactive shell with |
1784 | "execl ("/bin/bash", "-", NULL)". | |
1785 | If so, default the name of this shell to our name. */ | |
1786 | if (!shell_name || !*shell_name || (shell_name[0] == '-' && !shell_name[1])) | |
1787 | shell_name = PROGRAM; | |
1788 | } | |
726f6388 | 1789 | |
8868edaf CR |
1790 | /* Some options are initialized to -1 so we have a way to determine whether |
1791 | they were set on the command line. This is an issue when listing the option | |
1792 | values at invocation (`bash -o'), so we set the defaults here and reset | |
1793 | them after the call to list_minus_o_options (). */ | |
1794 | /* XXX - could also do this for histexp_flag, jobs_m_flag */ | |
1795 | static void | |
1796 | set_option_defaults () | |
1797 | { | |
1798 | #if defined (HISTORY) | |
1799 | enable_history_list = 0; | |
1800 | #endif | |
1801 | } | |
1802 | ||
1803 | static void | |
1804 | reset_option_defaults () | |
1805 | { | |
1806 | #if defined (HISTORY) | |
1807 | enable_history_list = -1; | |
1808 | #endif | |
1809 | } | |
1810 | ||
ccc6cda3 JA |
1811 | static void |
1812 | init_interactive () | |
1813 | { | |
3185942a JA |
1814 | expand_aliases = interactive_shell = startup_state = 1; |
1815 | interactive = 1; | |
a0c0a00f | 1816 | #if defined (HISTORY) |
8868edaf CR |
1817 | if (enable_history_list == -1) |
1818 | enable_history_list = 1; /* set default */ | |
1819 | remember_on_history = enable_history_list; | |
1820 | # if defined (BANG_HISTORY) | |
d233b485 | 1821 | histexp_flag = history_expansion; /* XXX */ |
8868edaf | 1822 | # endif |
a0c0a00f | 1823 | #endif |
726f6388 JA |
1824 | } |
1825 | ||
726f6388 | 1826 | static void |
ccc6cda3 | 1827 | init_noninteractive () |
726f6388 | 1828 | { |
ccc6cda3 | 1829 | #if defined (HISTORY) |
8868edaf CR |
1830 | if (enable_history_list == -1) /* set default */ |
1831 | enable_history_list = 0; | |
ccc6cda3 JA |
1832 | bash_history_reinit (0); |
1833 | #endif /* HISTORY */ | |
1834 | interactive_shell = startup_state = interactive = 0; | |
7117c2d2 | 1835 | expand_aliases = posixly_correct; /* XXX - was 0 not posixly_correct */ |
ccc6cda3 JA |
1836 | no_line_editing = 1; |
1837 | #if defined (JOB_CONTROL) | |
ac50fbac CR |
1838 | /* Even if the shell is not interactive, enable job control if the -i or |
1839 | -m option is supplied at startup. */ | |
1840 | set_job_control (forced_interactive||jobs_m_flag); | |
ccc6cda3 | 1841 | #endif /* JOB_CONTROL */ |
726f6388 JA |
1842 | } |
1843 | ||
3185942a JA |
1844 | static void |
1845 | init_interactive_script () | |
1846 | { | |
8868edaf CR |
1847 | #if defined (HISTORY) |
1848 | if (enable_history_list == -1) | |
1849 | enable_history_list = 1; | |
1850 | #endif | |
3185942a JA |
1851 | init_noninteractive (); |
1852 | expand_aliases = interactive_shell = startup_state = 1; | |
a0c0a00f | 1853 | #if defined (HISTORY) |
8868edaf | 1854 | remember_on_history = enable_history_list; /* XXX */ |
a0c0a00f | 1855 | #endif |
3185942a JA |
1856 | } |
1857 | ||
d166f048 JA |
1858 | void |
1859 | get_current_user_info () | |
1860 | { | |
1861 | struct passwd *entry; | |
1862 | ||
1863 | /* Don't fetch this more than once. */ | |
1864 | if (current_user.user_name == 0) | |
1865 | { | |
ac50fbac CR |
1866 | #if defined (__TANDEM) |
1867 | entry = getpwnam (getlogin ()); | |
1868 | #else | |
d166f048 | 1869 | entry = getpwuid (current_user.uid); |
ac50fbac | 1870 | #endif |
d166f048 JA |
1871 | if (entry) |
1872 | { | |
1873 | current_user.user_name = savestring (entry->pw_name); | |
1874 | current_user.shell = (entry->pw_shell && entry->pw_shell[0]) | |
1875 | ? savestring (entry->pw_shell) | |
1876 | : savestring ("/bin/sh"); | |
1877 | current_user.home_dir = savestring (entry->pw_dir); | |
1878 | } | |
1879 | else | |
1880 | { | |
b80f6443 JA |
1881 | current_user.user_name = _("I have no name!"); |
1882 | current_user.user_name = savestring (current_user.user_name); | |
d166f048 JA |
1883 | current_user.shell = savestring ("/bin/sh"); |
1884 | current_user.home_dir = savestring ("/"); | |
1885 | } | |
a0c0a00f | 1886 | #if defined (HAVE_GETPWENT) |
d166f048 | 1887 | endpwent (); |
a0c0a00f | 1888 | #endif |
d166f048 JA |
1889 | } |
1890 | } | |
1891 | ||
726f6388 JA |
1892 | /* Do whatever is necessary to initialize the shell. |
1893 | Put new initializations in here. */ | |
1894 | static void | |
1895 | shell_initialize () | |
1896 | { | |
ccc6cda3 | 1897 | char hostname[256]; |
a0c0a00f | 1898 | int should_be_restricted; |
ccc6cda3 | 1899 | |
726f6388 | 1900 | /* Line buffer output for stderr and stdout. */ |
cce855bc | 1901 | if (shell_initialized == 0) |
cce855bc | 1902 | { |
bb70624e JA |
1903 | sh_setlinebuf (stderr); |
1904 | sh_setlinebuf (stdout); | |
cce855bc | 1905 | } |
726f6388 JA |
1906 | |
1907 | /* Sort the array of shell builtins so that the binary search in | |
1908 | find_shell_builtin () works correctly. */ | |
1909 | initialize_shell_builtins (); | |
1910 | ||
1911 | /* Initialize the trap signal handlers before installing our own | |
1912 | signal handlers. traps.c:restore_original_signals () is responsible | |
1913 | for restoring the original default signal handlers. That function | |
1914 | is called when we make a new child. */ | |
1915 | initialize_traps (); | |
7117c2d2 | 1916 | initialize_signals (0); |
726f6388 | 1917 | |
ccc6cda3 JA |
1918 | /* It's highly unlikely that this will change. */ |
1919 | if (current_host_name == 0) | |
1920 | { | |
d166f048 | 1921 | /* Initialize current_host_name. */ |
ccc6cda3 JA |
1922 | if (gethostname (hostname, 255) < 0) |
1923 | current_host_name = "??host??"; | |
1924 | else | |
1925 | current_host_name = savestring (hostname); | |
1926 | } | |
1927 | ||
d166f048 JA |
1928 | /* Initialize the stuff in current_user that comes from the password |
1929 | file. We don't need to do this right away if the shell is not | |
1930 | interactive. */ | |
1931 | if (interactive_shell) | |
1932 | get_current_user_info (); | |
726f6388 JA |
1933 | |
1934 | /* Initialize our interface to the tilde expander. */ | |
1935 | tilde_initialize (); | |
1936 | ||
a0c0a00f CR |
1937 | #if defined (RESTRICTED_SHELL) |
1938 | should_be_restricted = shell_is_restricted (shell_name); | |
1939 | #endif | |
1940 | ||
ccc6cda3 JA |
1941 | /* Initialize internal and environment variables. Don't import shell |
1942 | functions from the environment if we are running in privileged or | |
1943 | restricted mode or if the shell is running setuid. */ | |
1944 | #if defined (RESTRICTED_SHELL) | |
a0c0a00f | 1945 | initialize_shell_variables (shell_environment, privileged_mode||restricted||should_be_restricted||running_setuid); |
ccc6cda3 JA |
1946 | #else |
1947 | initialize_shell_variables (shell_environment, privileged_mode||running_setuid); | |
1948 | #endif | |
726f6388 | 1949 | |
726f6388 | 1950 | /* Initialize the data structures for storing and running jobs. */ |
ac50fbac | 1951 | initialize_job_control (jobs_m_flag); |
726f6388 JA |
1952 | |
1953 | /* Initialize input streams to null. */ | |
1954 | initialize_bash_input (); | |
ccc6cda3 | 1955 | |
7117c2d2 JA |
1956 | initialize_flags (); |
1957 | ||
cce855bc | 1958 | /* Initialize the shell options. Don't import the shell options |
495aee44 CR |
1959 | from the environment variables $SHELLOPTS or $BASHOPTS if we are |
1960 | running in privileged or restricted mode or if the shell is running | |
1961 | setuid. */ | |
cce855bc | 1962 | #if defined (RESTRICTED_SHELL) |
a0c0a00f CR |
1963 | initialize_shell_options (privileged_mode||restricted||should_be_restricted||running_setuid); |
1964 | initialize_bashopts (privileged_mode||restricted||should_be_restricted||running_setuid); | |
cce855bc JA |
1965 | #else |
1966 | initialize_shell_options (privileged_mode||running_setuid); | |
0001803f | 1967 | initialize_bashopts (privileged_mode||running_setuid); |
cce855bc | 1968 | #endif |
726f6388 JA |
1969 | } |
1970 | ||
1971 | /* Function called by main () when it appears that the shell has already | |
1972 | had some initialization performed. This is supposed to reset the world | |
1973 | back to a pristine state, as if we had been exec'ed. */ | |
1974 | static void | |
1975 | shell_reinitialize () | |
1976 | { | |
1977 | /* The default shell prompts. */ | |
1978 | primary_prompt = PPROMPT; | |
1979 | secondary_prompt = SPROMPT; | |
1980 | ||
1981 | /* Things that get 1. */ | |
1982 | current_command_number = 1; | |
1983 | ||
1984 | /* We have decided that the ~/.bashrc file should not be executed | |
1985 | for the invocation of each shell script. If the variable $ENV | |
1986 | (or $BASH_ENV) is set, its value is used as the name of a file | |
1987 | to source. */ | |
1988 | no_rc = no_profile = 1; | |
1989 | ||
1990 | /* Things that get 0. */ | |
1991 | login_shell = make_login_shell = interactive = executing = 0; | |
1992 | debugging = do_version = line_number = last_command_exit_value = 0; | |
a0c0a00f CR |
1993 | forced_interactive = interactive_shell = 0; |
1994 | subshell_environment = running_in_background = 0; | |
ccc6cda3 | 1995 | expand_aliases = 0; |
d233b485 | 1996 | bash_argv_initialized = 0; |
726f6388 | 1997 | |
ac50fbac CR |
1998 | /* XXX - should we set jobs_m_flag to 0 here? */ |
1999 | ||
726f6388 | 2000 | #if defined (HISTORY) |
a0c0a00f | 2001 | bash_history_reinit (enable_history_list = 0); |
726f6388 JA |
2002 | #endif /* HISTORY */ |
2003 | ||
2004 | #if defined (RESTRICTED_SHELL) | |
2005 | restricted = 0; | |
2006 | #endif /* RESTRICTED_SHELL */ | |
2007 | ||
2008 | /* Ensure that the default startup file is used. (Except that we don't | |
2009 | execute this file for reinitialized shells). */ | |
a0c0a00f | 2010 | bashrc_file = DEFAULT_BASHRC; |
726f6388 JA |
2011 | |
2012 | /* Delete all variables and functions. They will be reinitialized when | |
2013 | the environment is parsed. */ | |
7117c2d2 | 2014 | delete_all_contexts (shell_variables); |
726f6388 JA |
2015 | delete_all_variables (shell_functions); |
2016 | ||
3185942a JA |
2017 | reinit_special_variables (); |
2018 | ||
2019 | #if defined (READLINE) | |
2020 | bashline_reinitialize (); | |
2021 | #endif | |
2022 | ||
28ef6c31 | 2023 | shell_reinitialized = 1; |
726f6388 JA |
2024 | } |
2025 | ||
726f6388 | 2026 | static void |
d166f048 | 2027 | show_shell_usage (fp, extra) |
ccc6cda3 | 2028 | FILE *fp; |
d166f048 | 2029 | int extra; |
726f6388 | 2030 | { |
ccc6cda3 JA |
2031 | int i; |
2032 | char *set_opts, *s, *t; | |
2033 | ||
d166f048 | 2034 | if (extra) |
3185942a | 2035 | fprintf (fp, _("GNU bash, version %s-(%s)\n"), shell_version_string (), MACHTYPE); |
b80f6443 | 2036 | fprintf (fp, _("Usage:\t%s [GNU long option] [option] ...\n\t%s [GNU long option] [option] script-file ...\n"), |
ccc6cda3 | 2037 | shell_name, shell_name); |
b80f6443 | 2038 | fputs (_("GNU long options:\n"), fp); |
ccc6cda3 JA |
2039 | for (i = 0; long_args[i].name; i++) |
2040 | fprintf (fp, "\t--%s\n", long_args[i].name); | |
2041 | ||
b80f6443 | 2042 | fputs (_("Shell options:\n"), fp); |
ac50fbac | 2043 | fputs (_("\t-ilrsD or -c command or -O shopt_option\t\t(invocation only)\n"), fp); |
ccc6cda3 JA |
2044 | |
2045 | for (i = 0, set_opts = 0; shell_builtins[i].name; i++) | |
2046 | if (STREQ (shell_builtins[i].name, "set")) | |
d233b485 CR |
2047 | { |
2048 | set_opts = savestring (shell_builtins[i].short_doc); | |
2049 | break; | |
2050 | } | |
2051 | ||
ccc6cda3 | 2052 | if (set_opts) |
726f6388 | 2053 | { |
0001803f | 2054 | s = strchr (set_opts, '['); |
ccc6cda3 JA |
2055 | if (s == 0) |
2056 | s = set_opts; | |
2057 | while (*++s == '-') | |
2058 | ; | |
0001803f | 2059 | t = strchr (s, ']'); |
ccc6cda3 JA |
2060 | if (t) |
2061 | *t = '\0'; | |
b80f6443 | 2062 | fprintf (fp, _("\t-%s or -o option\n"), s); |
ccc6cda3 | 2063 | free (set_opts); |
726f6388 JA |
2064 | } |
2065 | ||
d166f048 JA |
2066 | if (extra) |
2067 | { | |
b80f6443 JA |
2068 | fprintf (fp, _("Type `%s -c \"help set\"' for more information about shell options.\n"), shell_name); |
2069 | fprintf (fp, _("Type `%s -c help' for more information about shell builtin commands.\n"), shell_name); | |
2070 | fprintf (fp, _("Use the `bashbug' command to report bugs.\n")); | |
a0c0a00f CR |
2071 | fprintf (fp, "\n"); |
2072 | fprintf (fp, _("bash home page: <http://www.gnu.org/software/bash>\n")); | |
2073 | fprintf (fp, _("General help using GNU software: <http://www.gnu.org/gethelp/>\n")); | |
d166f048 | 2074 | } |
726f6388 JA |
2075 | } |
2076 | ||
f73dda09 JA |
2077 | static void |
2078 | add_shopt_to_alist (opt, on_or_off) | |
2079 | char *opt; | |
2080 | int on_or_off; | |
2081 | { | |
2082 | if (shopt_ind >= shopt_len) | |
2083 | { | |
2084 | shopt_len += 8; | |
2085 | shopt_alist = (STRING_INT_ALIST *)xrealloc (shopt_alist, shopt_len * sizeof (shopt_alist[0])); | |
2086 | } | |
2087 | shopt_alist[shopt_ind].word = opt; | |
2088 | shopt_alist[shopt_ind].token = on_or_off; | |
2089 | shopt_ind++; | |
2090 | } | |
2091 | ||
2092 | static void | |
2093 | run_shopt_alist () | |
2094 | { | |
2095 | register int i; | |
2096 | ||
2097 | for (i = 0; i < shopt_ind; i++) | |
2098 | if (shopt_setopt (shopt_alist[i].word, (shopt_alist[i].token == '-')) != EXECUTION_SUCCESS) | |
b80f6443 | 2099 | exit (EX_BADUSAGE); |
f73dda09 JA |
2100 | free (shopt_alist); |
2101 | shopt_alist = 0; | |
2102 | shopt_ind = shopt_len = 0; | |
2103 | } |