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bb70624e | 1 | /* shell.c -- GNU's idea of the POSIX shell specification. */ |
726f6388 | 2 | |
74091dd4 | 3 | /* Copyright (C) 1987-2021 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> | |
74091dd4 CR |
75 | #elif defined (MALLOC_DEBUG) && defined (USING_BASH_MALLOC) |
76 | # include <malloc/shmalloc.h> | |
7117c2d2 JA |
77 | #endif |
78 | ||
726f6388 JA |
79 | #if defined (HISTORY) |
80 | # include "bashhist.h" | |
81 | # include <readline/history.h> | |
82 | #endif | |
83 | ||
3185942a | 84 | #if defined (READLINE) |
84c617ec | 85 | # include <readline/readline.h> |
3185942a JA |
86 | # include "bashline.h" |
87 | #endif | |
88 | ||
726f6388 | 89 | #include <tilde/tilde.h> |
f73dda09 | 90 | #include <glob/strmatch.h> |
726f6388 | 91 | |
b72432fd JA |
92 | #if defined (__OPENNT) |
93 | # include <opennt/opennt.h> | |
94 | #endif | |
95 | ||
ccc6cda3 | 96 | #if !defined (HAVE_GETPW_DECLS) |
726f6388 | 97 | extern struct passwd *getpwuid (); |
ccc6cda3 | 98 | #endif /* !HAVE_GETPW_DECLS */ |
726f6388 | 99 | |
726f6388 JA |
100 | #if !defined (errno) |
101 | extern int errno; | |
102 | #endif | |
103 | ||
b72432fd JA |
104 | #if defined (NO_MAIN_ENV_ARG) |
105 | extern char **environ; /* used if no third argument to main() */ | |
106 | #endif | |
107 | ||
95732b49 | 108 | extern int gnu_error_format; |
726f6388 JA |
109 | |
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. */ | |
ccc6cda3 | 112 | int shell_initialized = 0; |
d233b485 | 113 | int bash_argv_initialized = 0; |
726f6388 JA |
114 | |
115 | COMMAND *global_command = (COMMAND *)NULL; | |
116 | ||
726f6388 JA |
117 | /* Information about the current user. */ |
118 | struct user_info current_user = | |
119 | { | |
f73dda09 JA |
120 | (uid_t)-1, (uid_t)-1, (gid_t)-1, (gid_t)-1, |
121 | (char *)NULL, (char *)NULL, (char *)NULL | |
726f6388 JA |
122 | }; |
123 | ||
124 | /* The current host's name. */ | |
125 | char *current_host_name = (char *)NULL; | |
126 | ||
127 | /* Non-zero means that this shell is a login shell. | |
128 | Specifically: | |
129 | 0 = not login shell. | |
130 | 1 = login shell from getty (or equivalent fake out) | |
7117c2d2 | 131 | -1 = login shell from "--login" (or -l) flag. |
726f6388 JA |
132 | -2 = both from getty, and from flag. |
133 | */ | |
134 | int login_shell = 0; | |
135 | ||
136 | /* Non-zero means that at this moment, the shell is interactive. In | |
137 | general, this means that the shell is at this moment reading input | |
138 | from the keyboard. */ | |
139 | int interactive = 0; | |
140 | ||
141 | /* Non-zero means that the shell was started as an interactive shell. */ | |
142 | int interactive_shell = 0; | |
143 | ||
cce855bc JA |
144 | /* Non-zero means to send a SIGHUP to all jobs when an interactive login |
145 | shell exits. */ | |
146 | int hup_on_exit = 0; | |
147 | ||
3185942a JA |
148 | /* Non-zero means to list status of running and stopped jobs at shell exit */ |
149 | int check_jobs_at_exit = 0; | |
150 | ||
151 | /* Non-zero means to change to a directory name supplied as a command name */ | |
152 | int autocd = 0; | |
153 | ||
726f6388 JA |
154 | /* Tells what state the shell was in when it started: |
155 | 0 = non-interactive shell script | |
156 | 1 = interactive | |
157 | 2 = -c command | |
7117c2d2 | 158 | 3 = wordexp evaluation |
726f6388 JA |
159 | This is a superset of the information provided by interactive_shell. |
160 | */ | |
161 | int startup_state = 0; | |
a0c0a00f | 162 | int reading_shell_script = 0; |
726f6388 JA |
163 | |
164 | /* Special debugging helper. */ | |
165 | int debugging_login_shell = 0; | |
166 | ||
167 | /* The environment that the shell passes to other commands. */ | |
168 | char **shell_environment; | |
169 | ||
170 | /* Non-zero when we are executing a top-level command. */ | |
171 | int executing = 0; | |
172 | ||
173 | /* The number of commands executed so far. */ | |
174 | int current_command_number = 1; | |
175 | ||
726f6388 JA |
176 | /* Non-zero is the recursion depth for commands. */ |
177 | int indirection_level = 0; | |
178 | ||
726f6388 JA |
179 | /* The name of this shell, as taken from argv[0]. */ |
180 | char *shell_name = (char *)NULL; | |
181 | ||
182 | /* time in seconds when the shell was started */ | |
183 | time_t shell_start_time; | |
8868edaf | 184 | struct timeval shellstart; |
726f6388 | 185 | |
ccc6cda3 JA |
186 | /* Are we running in an emacs shell window? */ |
187 | int running_under_emacs; | |
188 | ||
3185942a JA |
189 | /* Do we have /dev/fd? */ |
190 | #ifdef HAVE_DEV_FD | |
191 | int have_devfd = HAVE_DEV_FD; | |
192 | #else | |
193 | int have_devfd = 0; | |
194 | #endif | |
195 | ||
726f6388 | 196 | /* The name of the .(shell)rc file. */ |
a0c0a00f | 197 | static char *bashrc_file = DEFAULT_BASHRC; |
726f6388 JA |
198 | |
199 | /* Non-zero means to act more like the Bourne shell on startup. */ | |
ccc6cda3 JA |
200 | static int act_like_sh; |
201 | ||
202 | /* Non-zero if this shell is being run by `su'. */ | |
203 | static int su_shell; | |
204 | ||
205 | /* Non-zero if we have already expanded and sourced $ENV. */ | |
206 | static int sourced_env; | |
207 | ||
208 | /* Is this shell running setuid? */ | |
209 | static int running_setuid; | |
726f6388 JA |
210 | |
211 | /* Values for the long-winded argument names. */ | |
ccc6cda3 JA |
212 | static int debugging; /* Do debugging things. */ |
213 | static int no_rc; /* Don't execute ~/.bashrc */ | |
214 | static int no_profile; /* Don't execute .profile */ | |
215 | static int do_version; /* Display interesting version info. */ | |
216 | static int make_login_shell; /* Make this shell be a `-bash' shell. */ | |
217 | static int want_initial_help; /* --help option */ | |
726f6388 | 218 | |
b80f6443 | 219 | int debugging_mode = 0; /* In debugging mode with --debugger */ |
ac50fbac CR |
220 | #if defined (READLINE) |
221 | int no_line_editing = 0; /* non-zero -> don't do fancy line editing. */ | |
222 | #else | |
223 | int no_line_editing = 1; /* can't have line editing without readline */ | |
224 | #endif | |
74091dd4 | 225 | #if defined (TRANSLATABLE_STRINGS) |
ccc6cda3 | 226 | int dump_translatable_strings; /* Dump strings in $"...", don't execute. */ |
cce855bc | 227 | int dump_po_strings; /* Dump strings in $"..." in po format */ |
74091dd4 | 228 | #endif |
cce855bc | 229 | int wordexp_only = 0; /* Do word expansion only */ |
b80f6443 | 230 | int protected_mode = 0; /* No command substitution with --wordexp */ |
726f6388 | 231 | |
d233b485 CR |
232 | int pretty_print_mode = 0; /* pretty-print a shell script */ |
233 | ||
95732b49 JA |
234 | #if defined (STRICT_POSIX) |
235 | int posixly_correct = 1; /* Non-zero means posix.2 superset. */ | |
236 | #else | |
237 | int posixly_correct = 0; /* Non-zero means posix.2 superset. */ | |
238 | #endif | |
239 | ||
726f6388 JA |
240 | /* Some long-winded argument names. These are obviously new. */ |
241 | #define Int 1 | |
242 | #define Charp 2 | |
3185942a JA |
243 | static const struct { |
244 | const char *name; | |
726f6388 JA |
245 | int type; |
246 | int *int_value; | |
247 | char **char_value; | |
248 | } long_args[] = { | |
249 | { "debug", Int, &debugging, (char **)0x0 }, | |
b80f6443 JA |
250 | #if defined (DEBUGGER) |
251 | { "debugger", Int, &debugging_mode, (char **)0x0 }, | |
252 | #endif | |
74091dd4 | 253 | #if defined (TRANSLATABLE_STRINGS) |
cce855bc | 254 | { "dump-po-strings", Int, &dump_po_strings, (char **)0x0 }, |
ccc6cda3 | 255 | { "dump-strings", Int, &dump_translatable_strings, (char **)0x0 }, |
74091dd4 | 256 | #endif |
ccc6cda3 | 257 | { "help", Int, &want_initial_help, (char **)0x0 }, |
28ef6c31 | 258 | { "init-file", Charp, (int *)0x0, &bashrc_file }, |
ccc6cda3 JA |
259 | { "login", Int, &make_login_shell, (char **)0x0 }, |
260 | { "noediting", Int, &no_line_editing, (char **)0x0 }, | |
726f6388 | 261 | { "noprofile", Int, &no_profile, (char **)0x0 }, |
ccc6cda3 JA |
262 | { "norc", Int, &no_rc, (char **)0x0 }, |
263 | { "posix", Int, &posixly_correct, (char **)0x0 }, | |
d233b485 | 264 | { "pretty-print", Int, &pretty_print_mode, (char **)0x0 }, |
ac50fbac | 265 | #if defined (WORDEXP_OPTION) |
b80f6443 | 266 | { "protected", Int, &protected_mode, (char **)0x0 }, |
ac50fbac | 267 | #endif |
726f6388 | 268 | { "rcfile", Charp, (int *)0x0, &bashrc_file }, |
ccc6cda3 JA |
269 | #if defined (RESTRICTED_SHELL) |
270 | { "restricted", Int, &restricted, (char **)0x0 }, | |
271 | #endif | |
a0c0a00f | 272 | { "verbose", Int, &verbose_flag, (char **)0x0 }, |
726f6388 | 273 | { "version", Int, &do_version, (char **)0x0 }, |
0001803f | 274 | #if defined (WORDEXP_OPTION) |
cce855bc | 275 | { "wordexp", Int, &wordexp_only, (char **)0x0 }, |
0001803f | 276 | #endif |
726f6388 JA |
277 | { (char *)0x0, Int, (int *)0x0, (char **)0x0 } |
278 | }; | |
279 | ||
280 | /* These are extern so execute_simple_command can set them, and then | |
281 | longjmp back to main to execute a shell script, instead of calling | |
282 | main () again and resulting in indefinite, possibly fatal, stack | |
283 | growth. */ | |
ccc6cda3 | 284 | procenv_t subshell_top_level; |
726f6388 JA |
285 | int subshell_argc; |
286 | char **subshell_argv; | |
287 | char **subshell_envp; | |
288 | ||
495aee44 CR |
289 | char *exec_argv0; |
290 | ||
726f6388 JA |
291 | #if defined (BUFFERED_INPUT) |
292 | /* The file descriptor from which the shell is reading input. */ | |
293 | int default_buffered_input = -1; | |
294 | #endif | |
295 | ||
bb70624e JA |
296 | /* The following two variables are not static so they can show up in $-. */ |
297 | int read_from_stdin; /* -s flag supplied */ | |
298 | int want_pending_command; /* -c flag supplied */ | |
299 | ||
b80f6443 JA |
300 | /* This variable is not static so it can be bound to $BASH_EXECUTION_STRING */ |
301 | char *command_execution_string; /* argument to -c option */ | |
d233b485 | 302 | char *shell_script_filename; /* shell script */ |
b80f6443 | 303 | |
7117c2d2 JA |
304 | int malloc_trace_at_exit = 0; |
305 | ||
28ef6c31 | 306 | static int shell_reinitialized = 0; |
726f6388 | 307 | |
ccc6cda3 JA |
308 | static FILE *default_input; |
309 | ||
f73dda09 JA |
310 | static STRING_INT_ALIST *shopt_alist; |
311 | static int shopt_ind = 0, shopt_len = 0; | |
312 | ||
8868edaf CR |
313 | static int parse_long_options PARAMS((char **, int, int)); |
314 | static int parse_shell_options PARAMS((char **, int, int)); | |
315 | static int bind_args PARAMS((char **, int, int, int)); | |
f73dda09 | 316 | |
8868edaf | 317 | static void start_debugger PARAMS((void)); |
b80f6443 | 318 | |
8868edaf CR |
319 | static void add_shopt_to_alist PARAMS((char *, int)); |
320 | static void run_shopt_alist PARAMS((void)); | |
ccc6cda3 | 321 | |
8868edaf CR |
322 | static void execute_env_file PARAMS((char *)); |
323 | static void run_startup_files PARAMS((void)); | |
324 | static int open_shell_script PARAMS((char *)); | |
325 | static void set_bash_input PARAMS((void)); | |
326 | static int run_one_command PARAMS((char *)); | |
0001803f | 327 | #if defined (WORDEXP_OPTION) |
8868edaf | 328 | static int run_wordexp PARAMS((char *)); |
0001803f | 329 | #endif |
726f6388 | 330 | |
8868edaf | 331 | static int uidget PARAMS((void)); |
726f6388 | 332 | |
8868edaf CR |
333 | static void set_option_defaults PARAMS((void)); |
334 | static void reset_option_defaults PARAMS((void)); | |
f73dda09 | 335 | |
8868edaf CR |
336 | static void init_interactive PARAMS((void)); |
337 | static void init_noninteractive PARAMS((void)); | |
338 | static void init_interactive_script PARAMS((void)); | |
f73dda09 | 339 | |
8868edaf CR |
340 | static void set_shell_name PARAMS((char *)); |
341 | static void shell_initialize PARAMS((void)); | |
342 | static void shell_reinitialize PARAMS((void)); | |
343 | ||
344 | static void show_shell_usage PARAMS((FILE *, int)); | |
ccc6cda3 | 345 | |
28ef6c31 | 346 | #ifdef __CYGWIN__ |
cce855bc JA |
347 | static void |
348 | _cygwin32_check_tmp () | |
349 | { | |
350 | struct stat sb; | |
351 | ||
352 | if (stat ("/tmp", &sb) < 0) | |
b80f6443 | 353 | internal_warning (_("could not find /tmp, please create!")); |
cce855bc JA |
354 | else |
355 | { | |
356 | if (S_ISDIR (sb.st_mode) == 0) | |
b80f6443 | 357 | internal_warning (_("/tmp must be a valid directory name")); |
cce855bc JA |
358 | } |
359 | } | |
28ef6c31 | 360 | #endif /* __CYGWIN__ */ |
cce855bc | 361 | |
b72432fd JA |
362 | #if defined (NO_MAIN_ENV_ARG) |
363 | /* systems without third argument to main() */ | |
364 | int | |
365 | main (argc, argv) | |
366 | int argc; | |
367 | char **argv; | |
368 | #else /* !NO_MAIN_ENV_ARG */ | |
ccc6cda3 | 369 | int |
726f6388 JA |
370 | main (argc, argv, env) |
371 | int argc; | |
372 | char **argv, **env; | |
b72432fd | 373 | #endif /* !NO_MAIN_ENV_ARG */ |
726f6388 JA |
374 | { |
375 | register int i; | |
f73dda09 JA |
376 | int code, old_errexit_flag; |
377 | #if defined (RESTRICTED_SHELL) | |
378 | int saverst; | |
379 | #endif | |
ccc6cda3 JA |
380 | volatile int locally_skip_execution; |
381 | volatile int arg_index, top_level_arg_index; | |
b72432fd JA |
382 | #ifdef __OPENNT |
383 | char **env; | |
384 | ||
385 | env = environ; | |
386 | #endif /* __OPENNT */ | |
ccc6cda3 | 387 | |
f73dda09 JA |
388 | USE_VAR(argc); |
389 | USE_VAR(argv); | |
390 | USE_VAR(env); | |
391 | USE_VAR(code); | |
392 | USE_VAR(old_errexit_flag); | |
393 | #if defined (RESTRICTED_SHELL) | |
394 | USE_VAR(saverst); | |
395 | #endif | |
396 | ||
ccc6cda3 | 397 | /* Catch early SIGINTs. */ |
ac50fbac | 398 | code = setjmp_nosigs (top_level); |
ccc6cda3 JA |
399 | if (code) |
400 | exit (2); | |
401 | ||
0001803f CR |
402 | xtrace_init (); |
403 | ||
7117c2d2 | 404 | #if defined (USING_BASH_MALLOC) && defined (DEBUG) && !defined (DISABLE_MALLOC_WRAPPERS) |
a0c0a00f | 405 | malloc_set_register (1); /* XXX - change to 1 for malloc debugging */ |
f73dda09 JA |
406 | #endif |
407 | ||
ccc6cda3 | 408 | check_dev_tty (); |
726f6388 | 409 | |
28ef6c31 | 410 | #ifdef __CYGWIN__ |
cce855bc | 411 | _cygwin32_check_tmp (); |
28ef6c31 | 412 | #endif /* __CYGWIN__ */ |
cce855bc | 413 | |
726f6388 | 414 | /* Wait forever if we are debugging a login shell. */ |
95732b49 | 415 | while (debugging_login_shell) sleep (3); |
726f6388 | 416 | |
ccc6cda3 | 417 | set_default_locale (); |
726f6388 | 418 | |
ccc6cda3 | 419 | running_setuid = uidget (); |
726f6388 | 420 | |
28ef6c31 JA |
421 | if (getenv ("POSIXLY_CORRECT") || getenv ("POSIX_PEDANTIC")) |
422 | posixly_correct = 1; | |
726f6388 JA |
423 | |
424 | #if defined (USE_GNU_MALLOC_LIBRARY) | |
425 | mcheck (programming_error, (void (*) ())0); | |
426 | #endif /* USE_GNU_MALLOC_LIBRARY */ | |
427 | ||
a0c0a00f | 428 | if (setjmp_sigs (subshell_top_level)) |
726f6388 JA |
429 | { |
430 | argc = subshell_argc; | |
431 | argv = subshell_argv; | |
432 | env = subshell_envp; | |
433 | sourced_env = 0; | |
434 | } | |
435 | ||
28ef6c31 JA |
436 | shell_reinitialized = 0; |
437 | ||
ccc6cda3 | 438 | /* Initialize `local' variables for all `invocations' of main (). */ |
726f6388 | 439 | arg_index = 1; |
95732b49 JA |
440 | if (arg_index > argc) |
441 | arg_index = argc; | |
d233b485 | 442 | command_execution_string = shell_script_filename = (char *)NULL; |
ccc6cda3 | 443 | want_pending_command = locally_skip_execution = read_from_stdin = 0; |
726f6388 JA |
444 | default_input = stdin; |
445 | #if defined (BUFFERED_INPUT) | |
446 | default_buffered_input = -1; | |
447 | #endif | |
448 | ||
449 | /* Fix for the `infinite process creation' bug when running shell scripts | |
450 | from startup files on System V. */ | |
451 | login_shell = make_login_shell = 0; | |
452 | ||
453 | /* If this shell has already been run, then reinitialize it to a | |
454 | vanilla state. */ | |
455 | if (shell_initialized || shell_name) | |
456 | { | |
457 | /* Make sure that we do not infinitely recurse as a login shell. */ | |
458 | if (*shell_name == '-') | |
459 | shell_name++; | |
460 | ||
461 | shell_reinitialize (); | |
ac50fbac | 462 | if (setjmp_nosigs (top_level)) |
726f6388 JA |
463 | exit (2); |
464 | } | |
465 | ||
726f6388 | 466 | shell_environment = env; |
ccc6cda3 | 467 | set_shell_name (argv[0]); |
8868edaf CR |
468 | |
469 | gettimeofday (&shellstart, 0); | |
470 | shell_start_time = shellstart.tv_sec; | |
726f6388 | 471 | |
726f6388 JA |
472 | /* Parse argument flags from the input line. */ |
473 | ||
474 | /* Find full word arguments first. */ | |
ccc6cda3 | 475 | arg_index = parse_long_options (argv, arg_index, argc); |
a0c0a00f | 476 | |
ccc6cda3 | 477 | if (want_initial_help) |
726f6388 | 478 | { |
d166f048 | 479 | show_shell_usage (stdout, 1); |
ccc6cda3 | 480 | exit (EXECUTION_SUCCESS); |
726f6388 JA |
481 | } |
482 | ||
ccc6cda3 JA |
483 | if (do_version) |
484 | { | |
485 | show_shell_version (1); | |
486 | exit (EXECUTION_SUCCESS); | |
487 | } | |
726f6388 | 488 | |
a0c0a00f CR |
489 | echo_input_at_read = verbose_flag; /* --verbose given */ |
490 | ||
7117c2d2 JA |
491 | /* All done with full word options; do standard shell option parsing.*/ |
492 | this_command_name = shell_name; /* for error reporting */ | |
493 | arg_index = parse_shell_options (argv, arg_index, argc); | |
494 | ||
495 | /* If user supplied the "--login" (or -l) flag, then set and invert | |
496 | LOGIN_SHELL. */ | |
726f6388 JA |
497 | if (make_login_shell) |
498 | { | |
499 | login_shell++; | |
500 | login_shell = -login_shell; | |
501 | } | |
502 | ||
0001803f | 503 | set_login_shell ("login_shell", login_shell != 0); |
f73dda09 | 504 | |
74091dd4 | 505 | #if defined (TRANSLATABLE_STRINGS) |
cce855bc JA |
506 | if (dump_po_strings) |
507 | dump_translatable_strings = 1; | |
508 | ||
ccc6cda3 JA |
509 | if (dump_translatable_strings) |
510 | read_but_dont_execute = 1; | |
74091dd4 | 511 | #endif |
726f6388 | 512 | |
ccc6cda3 JA |
513 | if (running_setuid && privileged_mode == 0) |
514 | disable_priv_mode (); | |
726f6388 JA |
515 | |
516 | /* Need to get the argument to a -c option processed in the | |
517 | above loop. The next arg is a command to execute, and the | |
518 | following args are $0...$n respectively. */ | |
519 | if (want_pending_command) | |
520 | { | |
b80f6443 JA |
521 | command_execution_string = argv[arg_index]; |
522 | if (command_execution_string == 0) | |
726f6388 | 523 | { |
b80f6443 JA |
524 | report_error (_("%s: option requires an argument"), "-c"); |
525 | exit (EX_BADUSAGE); | |
726f6388 JA |
526 | } |
527 | arg_index++; | |
528 | } | |
ccc6cda3 | 529 | this_command_name = (char *)NULL; |
726f6388 JA |
530 | |
531 | /* First, let the outside world know about our interactive status. | |
532 | A shell is interactive if the `-i' flag was given, or if all of | |
533 | the following conditions are met: | |
534 | no -c command | |
535 | no arguments remaining or the -s flag given | |
536 | standard input is a terminal | |
b80f6443 | 537 | standard error is a terminal |
726f6388 JA |
538 | Refer to Posix.2, the description of the `sh' utility. */ |
539 | ||
540 | if (forced_interactive || /* -i flag */ | |
b80f6443 | 541 | (!command_execution_string && /* No -c command and ... */ |
cce855bc | 542 | wordexp_only == 0 && /* No --wordexp and ... */ |
726f6388 JA |
543 | ((arg_index == argc) || /* no remaining args or... */ |
544 | read_from_stdin) && /* -s flag with args, and */ | |
545 | isatty (fileno (stdin)) && /* Input is a terminal and */ | |
b80f6443 | 546 | isatty (fileno (stderr)))) /* error output is a terminal. */ |
ccc6cda3 | 547 | init_interactive (); |
726f6388 | 548 | else |
ccc6cda3 | 549 | init_noninteractive (); |
726f6388 | 550 | |
726f6388 JA |
551 | /* |
552 | * Some systems have the bad habit of starting login shells with lots of open | |
553 | * file descriptors. For instance, most systems that have picked up the | |
554 | * pre-4.0 Sun YP code leave a file descriptor open each time you call one | |
555 | * of the getpw* functions, and it's set to be open across execs. That | |
495aee44 CR |
556 | * means one for login, one for xterm, one for shelltool, etc. There are |
557 | * also systems that open persistent FDs to other agents or files as part | |
558 | * of process startup; these need to be set to be close-on-exec. | |
726f6388 JA |
559 | */ |
560 | if (login_shell && interactive_shell) | |
561 | { | |
562 | for (i = 3; i < 20; i++) | |
495aee44 | 563 | SET_CLOSE_ON_EXEC (i); |
726f6388 | 564 | } |
726f6388 | 565 | |
7117c2d2 JA |
566 | /* If we're in a strict Posix.2 mode, turn on interactive comments, |
567 | alias expansion in non-interactive shells, and other Posix.2 things. */ | |
d166f048 JA |
568 | if (posixly_correct) |
569 | { | |
95732b49 | 570 | bind_variable ("POSIXLY_CORRECT", "y", 0); |
28ef6c31 | 571 | sv_strict_posix ("POSIXLY_CORRECT"); |
d166f048 JA |
572 | } |
573 | ||
f73dda09 JA |
574 | /* Now we run the shopt_alist and process the options. */ |
575 | if (shopt_alist) | |
576 | run_shopt_alist (); | |
577 | ||
726f6388 JA |
578 | /* From here on in, the shell must be a normal functioning shell. |
579 | Variables from the environment are expected to be set, etc. */ | |
580 | shell_initialize (); | |
581 | ||
0628567a | 582 | set_default_lang (); |
ccc6cda3 JA |
583 | set_default_locale_vars (); |
584 | ||
3185942a | 585 | /* |
a0c0a00f CR |
586 | * M-x term -> TERM=eterm-color INSIDE_EMACS='251,term:0.96' (eterm) |
587 | * M-x shell -> TERM='dumb' INSIDE_EMACS='25.1,comint' (no line editing) | |
588 | * | |
589 | * Older versions of Emacs may set EMACS to 't' or to something like | |
590 | * '22.1 (term:0.96)' instead of (or in addition to) setting INSIDE_EMACS. | |
591 | * They may set TERM to 'eterm' instead of 'eterm-color'. They may have | |
592 | * a now-obsolete command that sets neither EMACS nor INSIDE_EMACS: | |
593 | * M-x terminal -> TERM='emacs-em7955' (line editing) | |
3185942a | 594 | */ |
726f6388 JA |
595 | if (interactive_shell) |
596 | { | |
d233b485 | 597 | char *term, *emacs, *inside_emacs; |
a0c0a00f | 598 | int emacs_term, in_emacs; |
ccc6cda3 | 599 | |
b80f6443 | 600 | term = get_string_value ("TERM"); |
b80f6443 | 601 | emacs = get_string_value ("EMACS"); |
a0c0a00f CR |
602 | inside_emacs = get_string_value ("INSIDE_EMACS"); |
603 | ||
604 | if (inside_emacs) | |
605 | { | |
606 | emacs_term = strstr (inside_emacs, ",term:") != 0; | |
607 | in_emacs = 1; | |
608 | } | |
609 | else if (emacs) | |
610 | { | |
611 | /* Infer whether we are in an older Emacs. */ | |
612 | emacs_term = strstr (emacs, " (term:") != 0; | |
613 | in_emacs = emacs_term || STREQ (emacs, "t"); | |
614 | } | |
615 | else | |
616 | in_emacs = emacs_term = 0; | |
3185942a JA |
617 | |
618 | /* Not sure any emacs terminal emulator sets TERM=emacs any more */ | |
a0c0a00f CR |
619 | no_line_editing |= STREQ (term, "emacs"); |
620 | no_line_editing |= in_emacs && STREQ (term, "dumb"); | |
3185942a JA |
621 | |
622 | /* running_under_emacs == 2 for `eterm' */ | |
a0c0a00f CR |
623 | running_under_emacs = in_emacs || STREQN (term, "emacs", 5); |
624 | running_under_emacs += emacs_term && STREQN (term, "eterm", 5); | |
3185942a | 625 | |
95732b49 JA |
626 | if (running_under_emacs) |
627 | gnu_error_format = 1; | |
726f6388 JA |
628 | } |
629 | ||
630 | top_level_arg_index = arg_index; | |
b72432fd | 631 | old_errexit_flag = exit_immediately_on_error; |
726f6388 | 632 | |
726f6388 JA |
633 | /* Give this shell a place to longjmp to before executing the |
634 | startup files. This allows users to press C-c to abort the | |
635 | lengthy startup. */ | |
a0c0a00f | 636 | code = setjmp_sigs (top_level); |
ccc6cda3 JA |
637 | if (code) |
638 | { | |
74091dd4 | 639 | if (code == EXITPROG || code == ERREXIT || code == EXITBLTIN) |
ccc6cda3 JA |
640 | exit_shell (last_command_exit_value); |
641 | else | |
d166f048 JA |
642 | { |
643 | #if defined (JOB_CONTROL) | |
644 | /* Reset job control, since run_startup_files turned it off. */ | |
645 | set_job_control (interactive_shell); | |
646 | #endif | |
b72432fd JA |
647 | /* Reset value of `set -e', since it's turned off before running |
648 | the startup files. */ | |
649 | exit_immediately_on_error += old_errexit_flag; | |
d166f048 JA |
650 | locally_skip_execution++; |
651 | } | |
ccc6cda3 | 652 | } |
726f6388 JA |
653 | |
654 | arg_index = top_level_arg_index; | |
655 | ||
656 | /* Execute the start-up scripts. */ | |
657 | ||
ccc6cda3 | 658 | if (interactive_shell == 0) |
726f6388 | 659 | { |
7117c2d2 JA |
660 | unbind_variable ("PS1"); |
661 | unbind_variable ("PS2"); | |
28ef6c31 | 662 | interactive = 0; |
7117c2d2 JA |
663 | #if 0 |
664 | /* This has already been done by init_noninteractive */ | |
28ef6c31 | 665 | expand_aliases = posixly_correct; |
7117c2d2 | 666 | #endif |
726f6388 JA |
667 | } |
668 | else | |
669 | { | |
670 | change_flag ('i', FLAG_ON); | |
671 | interactive = 1; | |
672 | } | |
673 | ||
e8ce775d | 674 | #if defined (RESTRICTED_SHELL) |
b72432fd JA |
675 | /* Set restricted_shell based on whether the basename of $0 indicates that |
676 | the shell should be restricted or if the `-r' option was supplied at | |
677 | startup. */ | |
678 | restricted_shell = shell_is_restricted (shell_name); | |
679 | ||
e8ce775d JA |
680 | /* If the `-r' option is supplied at invocation, make sure that the shell |
681 | is not in restricted mode when running the startup files. */ | |
b72432fd JA |
682 | saverst = restricted; |
683 | restricted = 0; | |
e8ce775d JA |
684 | #endif |
685 | ||
d233b485 CR |
686 | /* Set positional parameters before running startup files. top_level_arg_index |
687 | holds the index of the current argument before setting the positional | |
688 | parameters, so any changes performed in the startup files won't affect | |
689 | later option processing. */ | |
690 | if (wordexp_only) | |
691 | ; /* nothing yet */ | |
692 | else if (command_execution_string) | |
693 | arg_index = bind_args (argv, arg_index, argc, 0); /* $0 ... $n */ | |
694 | else if (arg_index != argc && read_from_stdin == 0) | |
695 | { | |
696 | shell_script_filename = argv[arg_index++]; | |
697 | arg_index = bind_args (argv, arg_index, argc, 1); /* $1 ... $n */ | |
698 | } | |
699 | else | |
700 | arg_index = bind_args (argv, arg_index, argc, 1); /* $1 ... $n */ | |
701 | ||
b72432fd | 702 | /* The startup files are run with `set -e' temporarily disabled. */ |
ccc6cda3 | 703 | if (locally_skip_execution == 0 && running_setuid == 0) |
b72432fd | 704 | { |
74091dd4 CR |
705 | char *t; |
706 | ||
b72432fd JA |
707 | old_errexit_flag = exit_immediately_on_error; |
708 | exit_immediately_on_error = 0; | |
709 | ||
74091dd4 CR |
710 | /* Temporarily set $0 while running startup files, then restore it so |
711 | we get better error messages when trying to open script files. */ | |
712 | if (shell_script_filename) | |
713 | { | |
714 | t = dollar_vars[0]; | |
715 | dollar_vars[0] = exec_argv0 ? savestring (exec_argv0) : savestring (shell_script_filename); | |
716 | } | |
b72432fd | 717 | run_startup_files (); |
74091dd4 CR |
718 | if (shell_script_filename) |
719 | { | |
720 | free (dollar_vars[0]); | |
721 | dollar_vars[0] = t; | |
722 | } | |
b72432fd JA |
723 | exit_immediately_on_error += old_errexit_flag; |
724 | } | |
726f6388 | 725 | |
ccc6cda3 JA |
726 | /* If we are invoked as `sh', turn on Posix mode. */ |
727 | if (act_like_sh) | |
d166f048 | 728 | { |
95732b49 | 729 | bind_variable ("POSIXLY_CORRECT", "y", 0); |
28ef6c31 | 730 | sv_strict_posix ("POSIXLY_CORRECT"); |
d166f048 | 731 | } |
ccc6cda3 | 732 | |
726f6388 | 733 | #if defined (RESTRICTED_SHELL) |
cce855bc | 734 | /* Turn on the restrictions after executing the startup files. This |
e8ce775d JA |
735 | means that `bash -r' or `set -r' invoked from a startup file will |
736 | turn on the restrictions after the startup files are executed. */ | |
737 | restricted = saverst || restricted; | |
28ef6c31 JA |
738 | if (shell_reinitialized == 0) |
739 | maybe_make_restricted (shell_name); | |
726f6388 JA |
740 | #endif /* RESTRICTED_SHELL */ |
741 | ||
0001803f | 742 | #if defined (WORDEXP_OPTION) |
cce855bc JA |
743 | if (wordexp_only) |
744 | { | |
745 | startup_state = 3; | |
d233b485 | 746 | last_command_exit_value = run_wordexp (argv[top_level_arg_index]); |
cce855bc JA |
747 | exit_shell (last_command_exit_value); |
748 | } | |
0001803f | 749 | #endif |
cce855bc | 750 | |
a0c0a00f CR |
751 | cmd_init (); /* initialize the command object caches */ |
752 | uwp_init (); | |
753 | ||
b80f6443 | 754 | if (command_execution_string) |
ccc6cda3 | 755 | { |
ccc6cda3 | 756 | startup_state = 2; |
b80f6443 JA |
757 | |
758 | if (debugging_mode) | |
759 | start_debugger (); | |
760 | ||
726f6388 | 761 | #if defined (ONESHOT) |
f73dda09 | 762 | executing = 1; |
b80f6443 | 763 | run_one_command (command_execution_string); |
ccc6cda3 | 764 | exit_shell (last_command_exit_value); |
726f6388 | 765 | #else /* ONESHOT */ |
b80f6443 | 766 | with_input_from_string (command_execution_string, "-c"); |
ccc6cda3 | 767 | goto read_and_execute; |
726f6388 | 768 | #endif /* !ONESHOT */ |
ccc6cda3 JA |
769 | } |
770 | ||
771 | /* Get possible input filename and set up default_buffered_input or | |
772 | default_input as appropriate. */ | |
d233b485 CR |
773 | if (shell_script_filename) |
774 | open_shell_script (shell_script_filename); | |
ccc6cda3 | 775 | else if (interactive == 0) |
a0c0a00f CR |
776 | { |
777 | /* In this mode, bash is reading a script from stdin, which is a | |
778 | pipe or redirected file. */ | |
ccc6cda3 | 779 | #if defined (BUFFERED_INPUT) |
a0c0a00f | 780 | default_buffered_input = fileno (stdin); /* == 0 */ |
ccc6cda3 | 781 | #else |
a0c0a00f | 782 | setbuf (default_input, (char *)NULL); |
ccc6cda3 | 783 | #endif /* !BUFFERED_INPUT */ |
a0c0a00f CR |
784 | read_from_stdin = 1; |
785 | } | |
d233b485 | 786 | else if (top_level_arg_index == argc) /* arg index before startup files */ |
a0c0a00f CR |
787 | /* "If there are no operands and the -c option is not specified, the -s |
788 | option shall be assumed." */ | |
789 | read_from_stdin = 1; | |
ccc6cda3 JA |
790 | |
791 | set_bash_input (); | |
792 | ||
a0c0a00f | 793 | if (debugging_mode && locally_skip_execution == 0 && running_setuid == 0 && (reading_shell_script || interactive_shell == 0)) |
b80f6443 JA |
794 | start_debugger (); |
795 | ||
726f6388 JA |
796 | /* Do the things that should be done only for interactive shells. */ |
797 | if (interactive_shell) | |
798 | { | |
799 | /* Set up for checking for presence of mail. */ | |
726f6388 | 800 | reset_mail_timer (); |
3185942a | 801 | init_mail_dates (); |
726f6388 JA |
802 | |
803 | #if defined (HISTORY) | |
804 | /* Initialize the interactive history stuff. */ | |
ccc6cda3 | 805 | bash_initialize_history (); |
7117c2d2 JA |
806 | /* Don't load the history from the history file if we've already |
807 | saved some lines in this session (e.g., by putting `history -s xx' | |
808 | into one of the startup files). */ | |
809 | if (shell_initialized == 0 && history_lines_this_session == 0) | |
726f6388 JA |
810 | load_history (); |
811 | #endif /* HISTORY */ | |
812 | ||
813 | /* Initialize terminal state for interactive shells after the | |
814 | .bash_profile and .bashrc are interpreted. */ | |
815 | get_tty_state (); | |
816 | } | |
817 | ||
ccc6cda3 JA |
818 | #if !defined (ONESHOT) |
819 | read_and_execute: | |
820 | #endif /* !ONESHOT */ | |
726f6388 | 821 | |
ccc6cda3 | 822 | shell_initialized = 1; |
726f6388 | 823 | |
d233b485 CR |
824 | if (pretty_print_mode && interactive_shell) |
825 | { | |
826 | internal_warning (_("pretty-printing mode ignored in interactive shells")); | |
827 | pretty_print_mode = 0; | |
828 | } | |
829 | if (pretty_print_mode) | |
830 | exit_shell (pretty_print_loop ()); | |
831 | ||
ccc6cda3 JA |
832 | /* Read commands until exit condition. */ |
833 | reader_loop (); | |
834 | exit_shell (last_command_exit_value); | |
835 | } | |
726f6388 | 836 | |
ccc6cda3 JA |
837 | static int |
838 | parse_long_options (argv, arg_start, arg_end) | |
839 | char **argv; | |
840 | int arg_start, arg_end; | |
841 | { | |
842 | int arg_index, longarg, i; | |
843 | char *arg_string; | |
844 | ||
845 | arg_index = arg_start; | |
846 | while ((arg_index != arg_end) && (arg_string = argv[arg_index]) && | |
847 | (*arg_string == '-')) | |
848 | { | |
849 | longarg = 0; | |
850 | ||
851 | /* Make --login equivalent to -login. */ | |
852 | if (arg_string[1] == '-' && arg_string[2]) | |
726f6388 | 853 | { |
ccc6cda3 JA |
854 | longarg = 1; |
855 | arg_string++; | |
726f6388 JA |
856 | } |
857 | ||
ccc6cda3 | 858 | for (i = 0; long_args[i].name; i++) |
726f6388 | 859 | { |
ccc6cda3 | 860 | if (STREQ (arg_string + 1, long_args[i].name)) |
726f6388 | 861 | { |
ccc6cda3 JA |
862 | if (long_args[i].type == Int) |
863 | *long_args[i].int_value = 1; | |
864 | else if (argv[++arg_index] == 0) | |
865 | { | |
b80f6443 JA |
866 | report_error (_("%s: option requires an argument"), long_args[i].name); |
867 | exit (EX_BADUSAGE); | |
ccc6cda3 JA |
868 | } |
869 | else | |
870 | *long_args[i].char_value = argv[arg_index]; | |
871 | ||
872 | break; | |
726f6388 | 873 | } |
726f6388 | 874 | } |
ccc6cda3 | 875 | if (long_args[i].name == 0) |
726f6388 | 876 | { |
ccc6cda3 JA |
877 | if (longarg) |
878 | { | |
b80f6443 | 879 | report_error (_("%s: invalid option"), argv[arg_index]); |
d166f048 | 880 | show_shell_usage (stderr, 0); |
b80f6443 | 881 | exit (EX_BADUSAGE); |
ccc6cda3 JA |
882 | } |
883 | break; /* No such argument. Maybe flag arg. */ | |
726f6388 | 884 | } |
726f6388 | 885 | |
ccc6cda3 JA |
886 | arg_index++; |
887 | } | |
888 | ||
889 | return (arg_index); | |
890 | } | |
891 | ||
892 | static int | |
893 | parse_shell_options (argv, arg_start, arg_end) | |
894 | char **argv; | |
895 | int arg_start, arg_end; | |
896 | { | |
897 | int arg_index; | |
898 | int arg_character, on_or_off, next_arg, i; | |
899 | char *o_option, *arg_string; | |
900 | ||
901 | arg_index = arg_start; | |
902 | while (arg_index != arg_end && (arg_string = argv[arg_index]) && | |
903 | (*arg_string == '-' || *arg_string == '+')) | |
904 | { | |
905 | /* There are flag arguments, so parse them. */ | |
906 | next_arg = arg_index + 1; | |
907 | ||
908 | /* A single `-' signals the end of options. From the 4.3 BSD sh. | |
909 | An option `--' means the same thing; this is the standard | |
910 | getopt(3) meaning. */ | |
911 | if (arg_string[0] == '-' && | |
912 | (arg_string[1] == '\0' || | |
913 | (arg_string[1] == '-' && arg_string[2] == '\0'))) | |
914 | return (next_arg); | |
726f6388 | 915 | |
ccc6cda3 JA |
916 | i = 1; |
917 | on_or_off = arg_string[0]; | |
918 | while (arg_character = arg_string[i++]) | |
726f6388 | 919 | { |
ccc6cda3 JA |
920 | switch (arg_character) |
921 | { | |
922 | case 'c': | |
923 | want_pending_command = 1; | |
924 | break; | |
925 | ||
7117c2d2 JA |
926 | case 'l': |
927 | make_login_shell = 1; | |
928 | break; | |
929 | ||
ccc6cda3 JA |
930 | case 's': |
931 | read_from_stdin = 1; | |
932 | break; | |
933 | ||
934 | case 'o': | |
935 | o_option = argv[next_arg]; | |
936 | if (o_option == 0) | |
937 | { | |
8868edaf | 938 | set_option_defaults (); |
cce855bc | 939 | list_minus_o_opts (-1, (on_or_off == '-') ? 0 : 1); |
8868edaf | 940 | reset_option_defaults (); |
ccc6cda3 JA |
941 | break; |
942 | } | |
943 | if (set_minus_o_option (on_or_off, o_option) != EXECUTION_SUCCESS) | |
b80f6443 | 944 | exit (EX_BADUSAGE); |
ccc6cda3 JA |
945 | next_arg++; |
946 | break; | |
947 | ||
f73dda09 JA |
948 | case 'O': |
949 | /* Since some of these can be overridden by the normal | |
950 | interactive/non-interactive shell initialization or | |
951 | initializing posix mode, we save the options and process | |
952 | them after initialization. */ | |
953 | o_option = argv[next_arg]; | |
954 | if (o_option == 0) | |
955 | { | |
956 | shopt_listopt (o_option, (on_or_off == '-') ? 0 : 1); | |
957 | break; | |
958 | } | |
959 | add_shopt_to_alist (o_option, on_or_off); | |
960 | next_arg++; | |
961 | break; | |
962 | ||
ccc6cda3 | 963 | case 'D': |
74091dd4 | 964 | #if defined (TRANSLATABLE_STRINGS) |
ccc6cda3 | 965 | dump_translatable_strings = 1; |
74091dd4 | 966 | #endif |
ccc6cda3 JA |
967 | break; |
968 | ||
969 | default: | |
970 | if (change_flag (arg_character, on_or_off) == FLAG_ERROR) | |
971 | { | |
b80f6443 | 972 | report_error (_("%c%c: invalid option"), on_or_off, arg_character); |
d166f048 | 973 | show_shell_usage (stderr, 0); |
b80f6443 | 974 | exit (EX_BADUSAGE); |
ccc6cda3 JA |
975 | } |
976 | } | |
726f6388 | 977 | } |
ccc6cda3 JA |
978 | /* Can't do just a simple increment anymore -- what about |
979 | "bash -abouo emacs ignoreeof -hP"? */ | |
980 | arg_index = next_arg; | |
981 | } | |
726f6388 | 982 | |
ccc6cda3 JA |
983 | return (arg_index); |
984 | } | |
726f6388 | 985 | |
ccc6cda3 | 986 | /* Exit the shell with status S. */ |
cce855bc | 987 | void |
ccc6cda3 JA |
988 | exit_shell (s) |
989 | int s; | |
990 | { | |
0001803f CR |
991 | fflush (stdout); /* XXX */ |
992 | fflush (stderr); | |
993 | ||
84c617ec CR |
994 | /* Clean up the terminal if we are in a state where it's been modified. */ |
995 | #if defined (READLINE) | |
996 | if (RL_ISSTATE (RL_STATE_TERMPREPPED) && rl_deprep_term_function) | |
997 | (*rl_deprep_term_function) (); | |
998 | #endif | |
999 | if (read_tty_modified ()) | |
1000 | read_tty_cleanup (); | |
1001 | ||
ccc6cda3 JA |
1002 | /* Do trap[0] if defined. Allow it to override the exit status |
1003 | passed to us. */ | |
1004 | if (signal_is_trapped (0)) | |
1005 | s = run_exit_trap (); | |
1006 | ||
1007 | #if defined (PROCESS_SUBSTITUTION) | |
8868edaf | 1008 | unlink_all_fifos (); |
ccc6cda3 | 1009 | #endif /* PROCESS_SUBSTITUTION */ |
726f6388 | 1010 | |
726f6388 | 1011 | #if defined (HISTORY) |
ac50fbac | 1012 | if (remember_on_history) |
ccc6cda3 | 1013 | maybe_save_shell_history (); |
726f6388 | 1014 | #endif /* HISTORY */ |
ccc6cda3 | 1015 | |
3185942a JA |
1016 | #if defined (COPROCESS_SUPPORT) |
1017 | coproc_flush (); | |
1018 | #endif | |
1019 | ||
726f6388 | 1020 | #if defined (JOB_CONTROL) |
cce855bc JA |
1021 | /* If the user has run `shopt -s huponexit', hangup all jobs when we exit |
1022 | an interactive login shell. ksh does this unconditionally. */ | |
1023 | if (interactive_shell && login_shell && hup_on_exit) | |
1024 | hangup_all_jobs (); | |
1025 | ||
a0c0a00f CR |
1026 | /* If this shell is interactive, or job control is active, terminate all |
1027 | stopped jobs and restore the original terminal process group. Don't do | |
1028 | this if we're in a subshell and calling exit_shell after, for example, | |
1029 | a failed word expansion. We want to do this even if the shell is not | |
1030 | interactive because we set the terminal's process group when job control | |
1031 | is enabled regardless of the interactive status. */ | |
28ef6c31 JA |
1032 | if (subshell_environment == 0) |
1033 | end_job_control (); | |
726f6388 JA |
1034 | #endif /* JOB_CONTROL */ |
1035 | ||
1036 | /* Always return the exit status of the last command to our parent. */ | |
7117c2d2 | 1037 | sh_exit (s); |
726f6388 JA |
1038 | } |
1039 | ||
bb70624e JA |
1040 | /* A wrapper for exit that (optionally) can do other things, like malloc |
1041 | statistics tracing. */ | |
1042 | void | |
1043 | sh_exit (s) | |
1044 | int s; | |
1045 | { | |
7117c2d2 | 1046 | #if defined (MALLOC_DEBUG) && defined (USING_BASH_MALLOC) |
d233b485 | 1047 | if (malloc_trace_at_exit && (subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB)) == 0) |
7117c2d2 | 1048 | trace_malloc_stats (get_name_for_error (), (char *)NULL); |
a0c0a00f | 1049 | /* mlocation_write_table (); */ |
7117c2d2 JA |
1050 | #endif |
1051 | ||
bb70624e JA |
1052 | exit (s); |
1053 | } | |
1054 | ||
ac50fbac CR |
1055 | /* Exit a subshell, which includes calling the exit trap. We don't want to |
1056 | do any more cleanup, since a subshell is created as an exact copy of its | |
1057 | parent. */ | |
1058 | void | |
1059 | subshell_exit (s) | |
1060 | int s; | |
1061 | { | |
1062 | fflush (stdout); | |
1063 | fflush (stderr); | |
1064 | ||
1065 | /* Do trap[0] if defined. Allow it to override the exit status | |
1066 | passed to us. */ | |
74091dd4 | 1067 | last_command_exit_value = s; |
ac50fbac CR |
1068 | if (signal_is_trapped (0)) |
1069 | s = run_exit_trap (); | |
1070 | ||
1071 | sh_exit (s); | |
1072 | } | |
1073 | ||
8868edaf CR |
1074 | void |
1075 | set_exit_status (s) | |
1076 | int s; | |
1077 | { | |
1078 | set_pipestatus_from_exit (last_command_exit_value = s); | |
1079 | } | |
1080 | ||
726f6388 JA |
1081 | /* Source the bash startup files. If POSIXLY_CORRECT is non-zero, we obey |
1082 | the Posix.2 startup file rules: $ENV is expanded, and if the file it | |
1083 | names exists, that file is sourced. The Posix.2 rules are in effect | |
ccc6cda3 | 1084 | for interactive shells only. (section 4.56.5.3) */ |
726f6388 | 1085 | |
ccc6cda3 JA |
1086 | /* Execute ~/.bashrc for most shells. Never execute it if |
1087 | ACT_LIKE_SH is set, or if NO_RC is set. | |
726f6388 | 1088 | |
ccc6cda3 | 1089 | If the executable file "/usr/gnu/src/bash/foo" contains: |
726f6388 | 1090 | |
ccc6cda3 JA |
1091 | #!/usr/gnu/bin/bash |
1092 | echo hello | |
726f6388 | 1093 | |
ccc6cda3 | 1094 | then: |
726f6388 | 1095 | |
28ef6c31 JA |
1096 | COMMAND EXECUTE BASHRC |
1097 | -------------------------------- | |
1098 | bash -c foo NO | |
1099 | bash foo NO | |
1100 | foo NO | |
1101 | rsh machine ls YES (for rsh, which calls `bash -c') | |
1102 | rsh machine foo YES (for shell started by rsh) NO (for foo!) | |
1103 | echo ls | bash NO | |
1104 | login NO | |
1105 | bash YES | |
ccc6cda3 JA |
1106 | */ |
1107 | ||
1108 | static void | |
1109 | execute_env_file (env_file) | |
1110 | char *env_file; | |
1111 | { | |
1112 | char *fn; | |
ccc6cda3 JA |
1113 | |
1114 | if (env_file && *env_file) | |
1115 | { | |
f73dda09 JA |
1116 | fn = expand_string_unsplit_to_string (env_file, Q_DOUBLE_QUOTES); |
1117 | if (fn && *fn) | |
1118 | maybe_execute_file (fn, 1); | |
1119 | FREE (fn); | |
726f6388 | 1120 | } |
ccc6cda3 | 1121 | } |
726f6388 | 1122 | |
ccc6cda3 JA |
1123 | static void |
1124 | run_startup_files () | |
1125 | { | |
d166f048 JA |
1126 | #if defined (JOB_CONTROL) |
1127 | int old_job_control; | |
1128 | #endif | |
cce855bc | 1129 | int sourced_login, run_by_ssh; |
d166f048 | 1130 | |
74091dd4 | 1131 | #if 1 /* TAG:bash-5.3 andrew.gregory.8@gmail.com 2/21/2022 */ |
cce855bc | 1132 | /* get the rshd/sshd case out of the way first. */ |
ccc6cda3 | 1133 | if (interactive_shell == 0 && no_rc == 0 && login_shell == 0 && |
b80f6443 | 1134 | act_like_sh == 0 && command_execution_string) |
726f6388 | 1135 | { |
f73dda09 JA |
1136 | #ifdef SSH_SOURCE_BASHRC |
1137 | run_by_ssh = (find_variable ("SSH_CLIENT") != (SHELL_VAR *)0) || | |
1138 | (find_variable ("SSH2_CLIENT") != (SHELL_VAR *)0); | |
1139 | #else | |
1140 | run_by_ssh = 0; | |
74091dd4 | 1141 | #endif |
f73dda09 | 1142 | #endif |
cce855bc JA |
1143 | |
1144 | /* If we were run by sshd or we think we were run by rshd, execute | |
bb70624e | 1145 | ~/.bashrc if we are a top-level shell. */ |
74091dd4 | 1146 | #if 1 /* TAG:bash-5.3 */ |
bb70624e | 1147 | if ((run_by_ssh || isnetconn (fileno (stdin))) && shell_level < 2) |
74091dd4 CR |
1148 | #else |
1149 | if (isnetconn (fileno (stdin) && shell_level < 2) | |
1150 | #endif | |
cce855bc | 1151 | { |
ccc6cda3 | 1152 | #ifdef SYS_BASHRC |
b72432fd JA |
1153 | # if defined (__OPENNT) |
1154 | maybe_execute_file (_prefixInstallPath(SYS_BASHRC, NULL, 0), 1); | |
1155 | # else | |
cce855bc | 1156 | maybe_execute_file (SYS_BASHRC, 1); |
b72432fd | 1157 | # endif |
ccc6cda3 | 1158 | #endif |
cce855bc JA |
1159 | maybe_execute_file (bashrc_file, 1); |
1160 | return; | |
1161 | } | |
ccc6cda3 | 1162 | } |
726f6388 | 1163 | |
cce855bc JA |
1164 | #if defined (JOB_CONTROL) |
1165 | /* Startup files should be run without job control enabled. */ | |
1166 | old_job_control = interactive_shell ? set_job_control (0) : 0; | |
1167 | #endif | |
1168 | ||
1169 | sourced_login = 0; | |
1170 | ||
7117c2d2 JA |
1171 | /* A shell begun with the --login (or -l) flag that is not in posix mode |
1172 | runs the login shell startup files, no matter whether or not it is | |
bb70624e JA |
1173 | interactive. If NON_INTERACTIVE_LOGIN_SHELLS is defined, run the |
1174 | startup files if argv[0][0] == '-' as well. */ | |
1175 | #if defined (NON_INTERACTIVE_LOGIN_SHELLS) | |
1176 | if (login_shell && posixly_correct == 0) | |
1177 | #else | |
1178 | if (login_shell < 0 && posixly_correct == 0) | |
1179 | #endif | |
cce855bc JA |
1180 | { |
1181 | /* We don't execute .bashrc for login shells. */ | |
1182 | no_rc++; | |
1183 | ||
1184 | /* Execute /etc/profile and one of the personal login shell | |
1185 | initialization files. */ | |
1186 | if (no_profile == 0) | |
1187 | { | |
1188 | maybe_execute_file (SYS_PROFILE, 1); | |
1189 | ||
1190 | if (act_like_sh) /* sh */ | |
1191 | maybe_execute_file ("~/.profile", 1); | |
1192 | else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) && | |
1193 | (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */ | |
1194 | maybe_execute_file ("~/.profile", 1); | |
1195 | } | |
1196 | ||
1197 | sourced_login = 1; | |
1198 | } | |
cce855bc | 1199 | |
ccc6cda3 JA |
1200 | /* A non-interactive shell not named `sh' and not in posix mode reads and |
1201 | executes commands from $BASH_ENV. If `su' starts a shell with `-c cmd' | |
1202 | and `-su' as the name of the shell, we want to read the startup files. | |
1203 | No other non-interactive shells read any startup files. */ | |
1204 | if (interactive_shell == 0 && !(su_shell && login_shell)) | |
1205 | { | |
1206 | if (posixly_correct == 0 && act_like_sh == 0 && privileged_mode == 0 && | |
1207 | sourced_env++ == 0) | |
1208 | execute_env_file (get_string_value ("BASH_ENV")); | |
1209 | return; | |
1210 | } | |
726f6388 | 1211 | |
ccc6cda3 JA |
1212 | /* Interactive shell or `-su' shell. */ |
1213 | if (posixly_correct == 0) /* bash, sh */ | |
1214 | { | |
cce855bc JA |
1215 | if (login_shell && sourced_login++ == 0) |
1216 | { | |
1217 | /* We don't execute .bashrc for login shells. */ | |
1218 | no_rc++; | |
726f6388 | 1219 | |
cce855bc JA |
1220 | /* Execute /etc/profile and one of the personal login shell |
1221 | initialization files. */ | |
1222 | if (no_profile == 0) | |
1223 | { | |
1224 | maybe_execute_file (SYS_PROFILE, 1); | |
726f6388 | 1225 | |
cce855bc JA |
1226 | if (act_like_sh) /* sh */ |
1227 | maybe_execute_file ("~/.profile", 1); | |
1228 | else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) && | |
1229 | (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */ | |
1230 | maybe_execute_file ("~/.profile", 1); | |
1231 | } | |
1232 | } | |
726f6388 | 1233 | |
ccc6cda3 JA |
1234 | /* bash */ |
1235 | if (act_like_sh == 0 && no_rc == 0) | |
1236 | { | |
1237 | #ifdef SYS_BASHRC | |
b72432fd JA |
1238 | # if defined (__OPENNT) |
1239 | maybe_execute_file (_prefixInstallPath(SYS_BASHRC, NULL, 0), 1); | |
1240 | # else | |
ccc6cda3 | 1241 | maybe_execute_file (SYS_BASHRC, 1); |
bb70624e | 1242 | # endif |
ccc6cda3 | 1243 | #endif |
28ef6c31 | 1244 | maybe_execute_file (bashrc_file, 1); |
726f6388 | 1245 | } |
ccc6cda3 JA |
1246 | /* sh */ |
1247 | else if (act_like_sh && privileged_mode == 0 && sourced_env++ == 0) | |
28ef6c31 | 1248 | execute_env_file (get_string_value ("ENV")); |
ccc6cda3 JA |
1249 | } |
1250 | else /* bash --posix, sh --posix */ | |
1251 | { | |
1252 | /* bash and sh */ | |
1253 | if (interactive_shell && privileged_mode == 0 && sourced_env++ == 0) | |
28ef6c31 | 1254 | execute_env_file (get_string_value ("ENV")); |
726f6388 | 1255 | } |
d166f048 JA |
1256 | |
1257 | #if defined (JOB_CONTROL) | |
1258 | set_job_control (old_job_control); | |
1259 | #endif | |
726f6388 JA |
1260 | } |
1261 | ||
1262 | #if defined (RESTRICTED_SHELL) | |
b72432fd JA |
1263 | /* Return 1 if the shell should be a restricted one based on NAME or the |
1264 | value of `restricted'. Don't actually do anything, just return a | |
1265 | boolean value. */ | |
1266 | int | |
1267 | shell_is_restricted (name) | |
1268 | char *name; | |
1269 | { | |
1270 | char *temp; | |
1271 | ||
1272 | if (restricted) | |
1273 | return 1; | |
1274 | temp = base_pathname (name); | |
95732b49 JA |
1275 | if (*temp == '-') |
1276 | temp++; | |
b72432fd JA |
1277 | return (STREQ (temp, RESTRICTED_SHELL_NAME)); |
1278 | } | |
1279 | ||
ccc6cda3 JA |
1280 | /* Perhaps make this shell a `restricted' one, based on NAME. If the |
1281 | basename of NAME is "rbash", then this shell is restricted. The | |
1282 | name of the restricted shell is a configurable option, see config.h. | |
b72432fd JA |
1283 | In a restricted shell, PATH, SHELL, ENV, and BASH_ENV are read-only |
1284 | and non-unsettable. | |
726f6388 JA |
1285 | Do this also if `restricted' is already set to 1; maybe the shell was |
1286 | started with -r. */ | |
ccc6cda3 | 1287 | int |
726f6388 JA |
1288 | maybe_make_restricted (name) |
1289 | char *name; | |
1290 | { | |
1291 | char *temp; | |
1292 | ||
7117c2d2 | 1293 | temp = base_pathname (name); |
b80f6443 JA |
1294 | if (*temp == '-') |
1295 | temp++; | |
ccc6cda3 | 1296 | if (restricted || (STREQ (temp, RESTRICTED_SHELL_NAME))) |
726f6388 | 1297 | { |
d233b485 CR |
1298 | #if defined (RBASH_STATIC_PATH_VALUE) |
1299 | bind_variable ("PATH", RBASH_STATIC_PATH_VALUE, 0); | |
1300 | stupidly_hack_special_variables ("PATH"); /* clear hash table */ | |
1301 | #endif | |
726f6388 | 1302 | set_var_read_only ("PATH"); |
726f6388 | 1303 | set_var_read_only ("SHELL"); |
b72432fd JA |
1304 | set_var_read_only ("ENV"); |
1305 | set_var_read_only ("BASH_ENV"); | |
8868edaf | 1306 | set_var_read_only ("HISTFILE"); |
28ef6c31 | 1307 | restricted = 1; |
726f6388 | 1308 | } |
ccc6cda3 | 1309 | return (restricted); |
726f6388 JA |
1310 | } |
1311 | #endif /* RESTRICTED_SHELL */ | |
1312 | ||
ccc6cda3 JA |
1313 | /* Fetch the current set of uids and gids and return 1 if we're running |
1314 | setuid or setgid. */ | |
1315 | static int | |
1316 | uidget () | |
726f6388 | 1317 | { |
ccc6cda3 | 1318 | uid_t u; |
726f6388 | 1319 | |
ccc6cda3 JA |
1320 | u = getuid (); |
1321 | if (current_user.uid != u) | |
726f6388 | 1322 | { |
ccc6cda3 JA |
1323 | FREE (current_user.user_name); |
1324 | FREE (current_user.shell); | |
1325 | FREE (current_user.home_dir); | |
1326 | current_user.user_name = current_user.shell = current_user.home_dir = (char *)NULL; | |
726f6388 | 1327 | } |
ccc6cda3 JA |
1328 | current_user.uid = u; |
1329 | current_user.gid = getgid (); | |
1330 | current_user.euid = geteuid (); | |
1331 | current_user.egid = getegid (); | |
726f6388 | 1332 | |
ccc6cda3 JA |
1333 | /* See whether or not we are running setuid or setgid. */ |
1334 | return (current_user.uid != current_user.euid) || | |
1335 | (current_user.gid != current_user.egid); | |
1336 | } | |
726f6388 | 1337 | |
ccc6cda3 JA |
1338 | void |
1339 | disable_priv_mode () | |
1340 | { | |
a0c0a00f CR |
1341 | int e; |
1342 | ||
8868edaf CR |
1343 | #if HAVE_SETRESUID |
1344 | if (setresuid (current_user.uid, current_user.uid, current_user.uid) < 0) | |
1345 | #else | |
a0c0a00f | 1346 | if (setuid (current_user.uid) < 0) |
8868edaf | 1347 | #endif |
a0c0a00f CR |
1348 | { |
1349 | e = errno; | |
1350 | sys_error (_("cannot set uid to %d: effective uid %d"), current_user.uid, current_user.euid); | |
1351 | #if defined (EXIT_ON_SETUID_FAILURE) | |
1352 | if (e == EAGAIN) | |
1353 | exit (e); | |
1354 | #endif | |
1355 | } | |
8868edaf CR |
1356 | #if HAVE_SETRESGID |
1357 | if (setresgid (current_user.gid, current_user.gid, current_user.gid) < 0) | |
1358 | #else | |
a0c0a00f | 1359 | if (setgid (current_user.gid) < 0) |
8868edaf | 1360 | #endif |
a0c0a00f CR |
1361 | sys_error (_("cannot set gid to %d: effective gid %d"), current_user.gid, current_user.egid); |
1362 | ||
ccc6cda3 JA |
1363 | current_user.euid = current_user.uid; |
1364 | current_user.egid = current_user.gid; | |
726f6388 JA |
1365 | } |
1366 | ||
0001803f | 1367 | #if defined (WORDEXP_OPTION) |
cce855bc JA |
1368 | static int |
1369 | run_wordexp (words) | |
1370 | char *words; | |
1371 | { | |
1372 | int code, nw, nb; | |
b80f6443 | 1373 | WORD_LIST *wl, *tl, *result; |
cce855bc | 1374 | |
ac50fbac | 1375 | code = setjmp_nosigs (top_level); |
cce855bc JA |
1376 | |
1377 | if (code != NOT_JUMPED) | |
1378 | { | |
1379 | switch (code) | |
1380 | { | |
ac50fbac | 1381 | /* Some kind of throw to top_level has occurred. */ |
cce855bc JA |
1382 | case FORCE_EOF: |
1383 | return last_command_exit_value = 127; | |
b80f6443 | 1384 | case ERREXIT: |
cce855bc | 1385 | case EXITPROG: |
74091dd4 | 1386 | case EXITBLTIN: |
cce855bc JA |
1387 | return last_command_exit_value; |
1388 | case DISCARD: | |
1389 | return last_command_exit_value = 1; | |
1390 | default: | |
b72432fd | 1391 | command_error ("run_wordexp", CMDERR_BADJUMP, code, 0); |
cce855bc JA |
1392 | } |
1393 | } | |
1394 | ||
1395 | /* Run it through the parser to get a list of words and expand them */ | |
1396 | if (words && *words) | |
1397 | { | |
1398 | with_input_from_string (words, "--wordexp"); | |
1399 | if (parse_command () != 0) | |
28ef6c31 | 1400 | return (126); |
cce855bc JA |
1401 | if (global_command == 0) |
1402 | { | |
1403 | printf ("0\n0\n"); | |
1404 | return (0); | |
1405 | } | |
1406 | if (global_command->type != cm_simple) | |
28ef6c31 | 1407 | return (126); |
cce855bc | 1408 | wl = global_command->value.Simple->words; |
b80f6443 JA |
1409 | if (protected_mode) |
1410 | for (tl = wl; tl; tl = tl->next) | |
0628567a | 1411 | tl->word->flags |= W_NOCOMSUB|W_NOPROCSUB; |
cce855bc JA |
1412 | result = wl ? expand_words_no_vars (wl) : (WORD_LIST *)0; |
1413 | } | |
1414 | else | |
1415 | result = (WORD_LIST *)0; | |
1416 | ||
1417 | last_command_exit_value = 0; | |
1418 | ||
1419 | if (result == 0) | |
1420 | { | |
1421 | printf ("0\n0\n"); | |
1422 | return (0); | |
1423 | } | |
1424 | ||
1425 | /* Count up the number of words and bytes, and print them. Don't count | |
1426 | the trailing NUL byte. */ | |
1427 | for (nw = nb = 0, wl = result; wl; wl = wl->next) | |
1428 | { | |
1429 | nw++; | |
1430 | nb += strlen (wl->word->word); | |
1431 | } | |
1432 | printf ("%u\n%u\n", nw, nb); | |
1433 | /* Print each word on a separate line. This will have to be changed when | |
1434 | the interface to glibc is completed. */ | |
1435 | for (wl = result; wl; wl = wl->next) | |
1436 | printf ("%s\n", wl->word->word); | |
1437 | ||
1438 | return (0); | |
1439 | } | |
0001803f | 1440 | #endif |
cce855bc | 1441 | |
726f6388 JA |
1442 | #if defined (ONESHOT) |
1443 | /* Run one command, given as the argument to the -c option. Tell | |
1444 | parse_and_execute not to fork for a simple command. */ | |
ccc6cda3 | 1445 | static int |
726f6388 JA |
1446 | run_one_command (command) |
1447 | char *command; | |
1448 | { | |
1449 | int code; | |
1450 | ||
ac50fbac | 1451 | code = setjmp_nosigs (top_level); |
726f6388 JA |
1452 | |
1453 | if (code != NOT_JUMPED) | |
1454 | { | |
1455 | #if defined (PROCESS_SUBSTITUTION) | |
1456 | unlink_fifo_list (); | |
1457 | #endif /* PROCESS_SUBSTITUTION */ | |
1458 | switch (code) | |
1459 | { | |
ac50fbac | 1460 | /* Some kind of throw to top_level has occurred. */ |
726f6388 JA |
1461 | case FORCE_EOF: |
1462 | return last_command_exit_value = 127; | |
b80f6443 | 1463 | case ERREXIT: |
726f6388 | 1464 | case EXITPROG: |
74091dd4 | 1465 | case EXITBLTIN: |
726f6388 JA |
1466 | return last_command_exit_value; |
1467 | case DISCARD: | |
1468 | return last_command_exit_value = 1; | |
1469 | default: | |
b72432fd | 1470 | command_error ("run_one_command", CMDERR_BADJUMP, code, 0); |
726f6388 JA |
1471 | } |
1472 | } | |
8868edaf | 1473 | return (parse_and_execute (savestring (command), "-c", SEVAL_NOHIST|SEVAL_RESETLINE)); |
726f6388 JA |
1474 | } |
1475 | #endif /* ONESHOT */ | |
1476 | ||
ccc6cda3 JA |
1477 | static int |
1478 | bind_args (argv, arg_start, arg_end, start_index) | |
1479 | char **argv; | |
1480 | int arg_start, arg_end, start_index; | |
726f6388 | 1481 | { |
ccc6cda3 | 1482 | register int i; |
d233b485 CR |
1483 | WORD_LIST *args, *tl; |
1484 | ||
1485 | for (i = arg_start, args = tl = (WORD_LIST *)NULL; i < arg_end; i++) | |
1486 | { | |
1487 | if (args == 0) | |
1488 | args = tl = make_word_list (make_word (argv[i]), args); | |
1489 | else | |
1490 | { | |
1491 | tl->next = make_word_list (make_word (argv[i]), (WORD_LIST *)NULL); | |
1492 | tl = tl->next; | |
1493 | } | |
1494 | } | |
726f6388 | 1495 | |
ccc6cda3 | 1496 | if (args) |
726f6388 | 1497 | { |
ccc6cda3 | 1498 | if (start_index == 0) /* bind to $0...$n for sh -c command */ |
726f6388 | 1499 | { |
ccc6cda3 JA |
1500 | /* Posix.2 4.56.3 says that the first argument after sh -c command |
1501 | becomes $0, and the rest of the arguments become $1...$n */ | |
1502 | shell_name = savestring (args->word->word); | |
d166f048 | 1503 | FREE (dollar_vars[0]); |
ccc6cda3 JA |
1504 | dollar_vars[0] = savestring (args->word->word); |
1505 | remember_args (args->next, 1); | |
d233b485 CR |
1506 | if (debugging_mode) |
1507 | { | |
1508 | push_args (args->next); /* BASH_ARGV and BASH_ARGC */ | |
1509 | bash_argv_initialized = 1; | |
1510 | } | |
726f6388 | 1511 | } |
ccc6cda3 | 1512 | else /* bind to $1...$n for shell script */ |
b80f6443 JA |
1513 | { |
1514 | remember_args (args, 1); | |
d233b485 CR |
1515 | /* We do this unconditionally so something like -O extdebug doesn't |
1516 | do it first. We're setting the definitive positional params | |
1517 | here. */ | |
1518 | if (debugging_mode) | |
1519 | { | |
1520 | push_args (args); /* BASH_ARGV and BASH_ARGC */ | |
1521 | bash_argv_initialized = 1; | |
1522 | } | |
b80f6443 | 1523 | } |
726f6388 | 1524 | |
ccc6cda3 JA |
1525 | dispose_words (args); |
1526 | } | |
726f6388 | 1527 | |
ccc6cda3 JA |
1528 | return (i); |
1529 | } | |
726f6388 | 1530 | |
ccc6cda3 JA |
1531 | void |
1532 | unbind_args () | |
1533 | { | |
1534 | remember_args ((WORD_LIST *)NULL, 1); | |
b80f6443 JA |
1535 | pop_args (); /* Reset BASH_ARGV and BASH_ARGC */ |
1536 | } | |
1537 | ||
1538 | static void | |
1539 | start_debugger () | |
1540 | { | |
1541 | #if defined (DEBUGGER) && defined (DEBUGGER_START_FILE) | |
1542 | int old_errexit; | |
a0c0a00f | 1543 | int r; |
b80f6443 JA |
1544 | |
1545 | old_errexit = exit_immediately_on_error; | |
1546 | exit_immediately_on_error = 0; | |
1547 | ||
a0c0a00f CR |
1548 | r = force_execute_file (DEBUGGER_START_FILE, 1); |
1549 | if (r < 0) | |
1550 | { | |
1551 | internal_warning (_("cannot start debugger; debugging mode disabled")); | |
1552 | debugging_mode = 0; | |
1553 | } | |
1554 | error_trace_mode = function_trace_mode = debugging_mode; | |
1555 | ||
1556 | set_shellopts (); | |
1557 | set_bashopts (); | |
b80f6443 JA |
1558 | |
1559 | exit_immediately_on_error += old_errexit; | |
1560 | #endif | |
ccc6cda3 | 1561 | } |
726f6388 | 1562 | |
ccc6cda3 JA |
1563 | static int |
1564 | open_shell_script (script_name) | |
1565 | char *script_name; | |
1566 | { | |
28ef6c31 | 1567 | int fd, e, fd_is_tty; |
b80f6443 | 1568 | char *filename, *path_filename, *t; |
f73dda09 | 1569 | char sample[80]; |
ccc6cda3 | 1570 | int sample_len; |
d166f048 | 1571 | struct stat sb; |
b80f6443 JA |
1572 | #if defined (ARRAY_VARS) |
1573 | SHELL_VAR *funcname_v, *bash_source_v, *bash_lineno_v; | |
1574 | ARRAY *funcname_a, *bash_source_a, *bash_lineno_a; | |
1575 | #endif | |
726f6388 | 1576 | |
ccc6cda3 | 1577 | filename = savestring (script_name); |
726f6388 | 1578 | |
ccc6cda3 JA |
1579 | fd = open (filename, O_RDONLY); |
1580 | if ((fd < 0) && (errno == ENOENT) && (absolute_program (filename) == 0)) | |
1581 | { | |
d166f048 | 1582 | e = errno; |
ccc6cda3 JA |
1583 | /* If it's not in the current directory, try looking through PATH |
1584 | for it. */ | |
1585 | path_filename = find_path_file (script_name); | |
1586 | if (path_filename) | |
726f6388 | 1587 | { |
ccc6cda3 JA |
1588 | free (filename); |
1589 | filename = path_filename; | |
1590 | fd = open (filename, O_RDONLY); | |
726f6388 | 1591 | } |
d166f048 JA |
1592 | else |
1593 | errno = e; | |
726f6388 | 1594 | } |
726f6388 | 1595 | |
ccc6cda3 JA |
1596 | if (fd < 0) |
1597 | { | |
d166f048 | 1598 | e = errno; |
ccc6cda3 | 1599 | file_error (filename); |
d233b485 CR |
1600 | #if defined (JOB_CONTROL) |
1601 | end_job_control (); /* just in case we were run as bash -i script */ | |
1602 | #endif | |
a0c0a00f | 1603 | sh_exit ((e == ENOENT) ? EX_NOTFOUND : EX_NOINPUT); |
ccc6cda3 | 1604 | } |
726f6388 | 1605 | |
b80f6443 | 1606 | free (dollar_vars[0]); |
495aee44 CR |
1607 | dollar_vars[0] = exec_argv0 ? savestring (exec_argv0) : savestring (script_name); |
1608 | if (exec_argv0) | |
1609 | { | |
1610 | free (exec_argv0); | |
1611 | exec_argv0 = (char *)NULL; | |
1612 | } | |
b80f6443 | 1613 | |
a0c0a00f CR |
1614 | if (file_isdir (filename)) |
1615 | { | |
1616 | #if defined (EISDIR) | |
1617 | errno = EISDIR; | |
1618 | #else | |
1619 | errno = EINVAL; | |
1620 | #endif | |
1621 | file_error (filename); | |
d233b485 CR |
1622 | #if defined (JOB_CONTROL) |
1623 | end_job_control (); /* just in case we were run as bash -i script */ | |
1624 | #endif | |
a0c0a00f CR |
1625 | sh_exit (EX_NOINPUT); |
1626 | } | |
1627 | ||
b80f6443 JA |
1628 | #if defined (ARRAY_VARS) |
1629 | GET_ARRAY_FROM_VAR ("FUNCNAME", funcname_v, funcname_a); | |
1630 | GET_ARRAY_FROM_VAR ("BASH_SOURCE", bash_source_v, bash_source_a); | |
1631 | GET_ARRAY_FROM_VAR ("BASH_LINENO", bash_lineno_v, bash_lineno_a); | |
1632 | ||
1633 | array_push (bash_source_a, filename); | |
1634 | if (bash_lineno_a) | |
1635 | { | |
1636 | t = itos (executing_line_number ()); | |
1637 | array_push (bash_lineno_a, t); | |
1638 | free (t); | |
1639 | } | |
1640 | array_push (funcname_a, "main"); | |
1641 | #endif | |
1642 | ||
28ef6c31 JA |
1643 | #ifdef HAVE_DEV_FD |
1644 | fd_is_tty = isatty (fd); | |
1645 | #else | |
1646 | fd_is_tty = 0; | |
1647 | #endif | |
1648 | ||
1649 | /* Only do this with non-tty file descriptors we can seek on. */ | |
1650 | if (fd_is_tty == 0 && (lseek (fd, 0L, 1) != -1)) | |
ccc6cda3 JA |
1651 | { |
1652 | /* Check to see if the `file' in `bash file' is a binary file | |
1653 | according to the same tests done by execute_simple_command (), | |
1654 | and report an error and exit if it is. */ | |
1655 | sample_len = read (fd, sample, sizeof (sample)); | |
d166f048 JA |
1656 | if (sample_len < 0) |
1657 | { | |
1658 | e = errno; | |
1659 | if ((fstat (fd, &sb) == 0) && S_ISDIR (sb.st_mode)) | |
a0c0a00f CR |
1660 | { |
1661 | #if defined (EISDIR) | |
1662 | errno = EISDIR; | |
1663 | file_error (filename); | |
1664 | #else | |
1665 | internal_error (_("%s: Is a directory"), filename); | |
1666 | #endif | |
1667 | } | |
28ef6c31 | 1668 | else |
d166f048 JA |
1669 | { |
1670 | errno = e; | |
1671 | file_error (filename); | |
1672 | } | |
d233b485 CR |
1673 | #if defined (JOB_CONTROL) |
1674 | end_job_control (); /* just in case we were run as bash -i script */ | |
1675 | #endif | |
d166f048 JA |
1676 | exit (EX_NOEXEC); |
1677 | } | |
1678 | else if (sample_len > 0 && (check_binary_file (sample, sample_len))) | |
ccc6cda3 | 1679 | { |
3185942a | 1680 | internal_error (_("%s: cannot execute binary file"), filename); |
d233b485 CR |
1681 | #if defined (JOB_CONTROL) |
1682 | end_job_control (); /* just in case we were run as bash -i script */ | |
1683 | #endif | |
ccc6cda3 JA |
1684 | exit (EX_BINARY_FILE); |
1685 | } | |
1686 | /* Now rewind the file back to the beginning. */ | |
1687 | lseek (fd, 0L, 0); | |
1688 | } | |
726f6388 | 1689 | |
bb70624e JA |
1690 | /* Open the script. But try to move the file descriptor to a randomly |
1691 | large one, in the hopes that any descriptors used by the script will | |
1692 | not match with ours. */ | |
3185942a | 1693 | fd = move_to_high_fd (fd, 1, -1); |
bb70624e | 1694 | |
ccc6cda3 JA |
1695 | #if defined (BUFFERED_INPUT) |
1696 | default_buffered_input = fd; | |
ccc6cda3 JA |
1697 | SET_CLOSE_ON_EXEC (default_buffered_input); |
1698 | #else /* !BUFFERED_INPUT */ | |
ccc6cda3 | 1699 | default_input = fdopen (fd, "r"); |
726f6388 | 1700 | |
ccc6cda3 JA |
1701 | if (default_input == 0) |
1702 | { | |
1703 | file_error (filename); | |
1704 | exit (EX_NOTFOUND); | |
1705 | } | |
726f6388 | 1706 | |
ccc6cda3 JA |
1707 | SET_CLOSE_ON_EXEC (fd); |
1708 | if (fileno (default_input) != fd) | |
1709 | SET_CLOSE_ON_EXEC (fileno (default_input)); | |
1710 | #endif /* !BUFFERED_INPUT */ | |
726f6388 | 1711 | |
28ef6c31 JA |
1712 | /* Just about the only way for this code to be executed is if something |
1713 | like `bash -i /dev/stdin' is executed. */ | |
1714 | if (interactive_shell && fd_is_tty) | |
ccc6cda3 | 1715 | { |
ccc6cda3 JA |
1716 | dup2 (fd, 0); |
1717 | close (fd); | |
1718 | fd = 0; | |
1719 | #if defined (BUFFERED_INPUT) | |
1720 | default_buffered_input = 0; | |
1721 | #else | |
1722 | fclose (default_input); | |
1723 | default_input = stdin; | |
1724 | #endif | |
1725 | } | |
f73dda09 JA |
1726 | else if (forced_interactive && fd_is_tty == 0) |
1727 | /* But if a script is called with something like `bash -i scriptname', | |
1728 | we need to do a non-interactive setup here, since we didn't do it | |
1729 | before. */ | |
3185942a | 1730 | init_interactive_script (); |
28ef6c31 | 1731 | |
ccc6cda3 | 1732 | free (filename); |
a0c0a00f CR |
1733 | |
1734 | reading_shell_script = 1; | |
ccc6cda3 | 1735 | return (fd); |
726f6388 JA |
1736 | } |
1737 | ||
ccc6cda3 JA |
1738 | /* Initialize the input routines for the parser. */ |
1739 | static void | |
1740 | set_bash_input () | |
726f6388 | 1741 | { |
ccc6cda3 JA |
1742 | /* Make sure the fd from which we are reading input is not in |
1743 | no-delay mode. */ | |
1744 | #if defined (BUFFERED_INPUT) | |
1745 | if (interactive == 0) | |
28ef6c31 | 1746 | sh_unset_nodelay_mode (default_buffered_input); |
ccc6cda3 JA |
1747 | else |
1748 | #endif /* !BUFFERED_INPUT */ | |
28ef6c31 | 1749 | sh_unset_nodelay_mode (fileno (stdin)); |
726f6388 | 1750 | |
ccc6cda3 JA |
1751 | /* with_input_from_stdin really means `with_input_from_readline' */ |
1752 | if (interactive && no_line_editing == 0) | |
1753 | with_input_from_stdin (); | |
ccc6cda3 | 1754 | #if defined (BUFFERED_INPUT) |
95732b49 JA |
1755 | else if (interactive == 0) |
1756 | with_input_from_buffered_stream (default_buffered_input, dollar_vars[0]); | |
1757 | #endif /* BUFFERED_INPUT */ | |
1758 | else | |
ccc6cda3 | 1759 | with_input_from_stream (default_input, dollar_vars[0]); |
726f6388 JA |
1760 | } |
1761 | ||
cce855bc JA |
1762 | /* Close the current shell script input source and forget about it. This is |
1763 | extern so execute_cmd.c:initialize_subshell() can call it. If CHECK_ZERO | |
1764 | is non-zero, we close default_buffered_input even if it's the standard | |
1765 | input (fd 0). */ | |
1766 | void | |
1767 | unset_bash_input (check_zero) | |
1768 | int check_zero; | |
1769 | { | |
1770 | #if defined (BUFFERED_INPUT) | |
1771 | if ((check_zero && default_buffered_input >= 0) || | |
1772 | (check_zero == 0 && default_buffered_input > 0)) | |
1773 | { | |
1774 | close_buffered_fd (default_buffered_input); | |
1775 | default_buffered_input = bash_input.location.buffered_fd = -1; | |
3185942a | 1776 | bash_input.type = st_none; /* XXX */ |
cce855bc JA |
1777 | } |
1778 | #else /* !BUFFERED_INPUT */ | |
1779 | if (default_input) | |
1780 | { | |
1781 | fclose (default_input); | |
1782 | default_input = (FILE *)NULL; | |
1783 | } | |
1784 | #endif /* !BUFFERED_INPUT */ | |
1785 | } | |
1786 | ||
1787 | ||
ccc6cda3 JA |
1788 | #if !defined (PROGRAM) |
1789 | # define PROGRAM "bash" | |
1790 | #endif | |
1791 | ||
1792 | static void | |
1793 | set_shell_name (argv0) | |
1794 | char *argv0; | |
726f6388 | 1795 | { |
ccc6cda3 JA |
1796 | /* Here's a hack. If the name of this shell is "sh", then don't do |
1797 | any startup files; just try to be more like /bin/sh. */ | |
95732b49 | 1798 | shell_name = argv0 ? base_pathname (argv0) : PROGRAM; |
7117c2d2 | 1799 | |
0628567a | 1800 | if (argv0 && *argv0 == '-') |
7117c2d2 | 1801 | { |
0628567a JA |
1802 | if (*shell_name == '-') |
1803 | shell_name++; | |
ac50fbac | 1804 | login_shell = 1; |
7117c2d2 JA |
1805 | } |
1806 | ||
ccc6cda3 JA |
1807 | if (shell_name[0] == 's' && shell_name[1] == 'h' && shell_name[2] == '\0') |
1808 | act_like_sh++; | |
1809 | if (shell_name[0] == 's' && shell_name[1] == 'u' && shell_name[2] == '\0') | |
1810 | su_shell++; | |
726f6388 | 1811 | |
95732b49 | 1812 | shell_name = argv0 ? argv0 : PROGRAM; |
ccc6cda3 JA |
1813 | FREE (dollar_vars[0]); |
1814 | dollar_vars[0] = savestring (shell_name); | |
726f6388 | 1815 | |
ccc6cda3 JA |
1816 | /* A program may start an interactive shell with |
1817 | "execl ("/bin/bash", "-", NULL)". | |
1818 | If so, default the name of this shell to our name. */ | |
1819 | if (!shell_name || !*shell_name || (shell_name[0] == '-' && !shell_name[1])) | |
1820 | shell_name = PROGRAM; | |
1821 | } | |
726f6388 | 1822 | |
8868edaf CR |
1823 | /* Some options are initialized to -1 so we have a way to determine whether |
1824 | they were set on the command line. This is an issue when listing the option | |
1825 | values at invocation (`bash -o'), so we set the defaults here and reset | |
1826 | them after the call to list_minus_o_options (). */ | |
1827 | /* XXX - could also do this for histexp_flag, jobs_m_flag */ | |
1828 | static void | |
1829 | set_option_defaults () | |
1830 | { | |
1831 | #if defined (HISTORY) | |
1832 | enable_history_list = 0; | |
1833 | #endif | |
1834 | } | |
1835 | ||
1836 | static void | |
1837 | reset_option_defaults () | |
1838 | { | |
1839 | #if defined (HISTORY) | |
1840 | enable_history_list = -1; | |
1841 | #endif | |
1842 | } | |
1843 | ||
ccc6cda3 JA |
1844 | static void |
1845 | init_interactive () | |
1846 | { | |
8c9524f9 CR |
1847 | expand_aliases = expaliases_flag = 1; |
1848 | interactive_shell = startup_state = interactive = 1; | |
a0c0a00f | 1849 | #if defined (HISTORY) |
8868edaf CR |
1850 | if (enable_history_list == -1) |
1851 | enable_history_list = 1; /* set default */ | |
1852 | remember_on_history = enable_history_list; | |
1853 | # if defined (BANG_HISTORY) | |
d233b485 | 1854 | histexp_flag = history_expansion; /* XXX */ |
8868edaf | 1855 | # endif |
a0c0a00f | 1856 | #endif |
726f6388 JA |
1857 | } |
1858 | ||
726f6388 | 1859 | static void |
ccc6cda3 | 1860 | init_noninteractive () |
726f6388 | 1861 | { |
ccc6cda3 | 1862 | #if defined (HISTORY) |
8868edaf CR |
1863 | if (enable_history_list == -1) /* set default */ |
1864 | enable_history_list = 0; | |
ccc6cda3 JA |
1865 | bash_history_reinit (0); |
1866 | #endif /* HISTORY */ | |
1867 | interactive_shell = startup_state = interactive = 0; | |
8c9524f9 | 1868 | expand_aliases = expaliases_flag = posixly_correct; /* XXX - was 0 not posixly_correct */ |
ccc6cda3 JA |
1869 | no_line_editing = 1; |
1870 | #if defined (JOB_CONTROL) | |
ac50fbac CR |
1871 | /* Even if the shell is not interactive, enable job control if the -i or |
1872 | -m option is supplied at startup. */ | |
1873 | set_job_control (forced_interactive||jobs_m_flag); | |
ccc6cda3 | 1874 | #endif /* JOB_CONTROL */ |
726f6388 JA |
1875 | } |
1876 | ||
3185942a JA |
1877 | static void |
1878 | init_interactive_script () | |
1879 | { | |
8868edaf CR |
1880 | #if defined (HISTORY) |
1881 | if (enable_history_list == -1) | |
1882 | enable_history_list = 1; | |
1883 | #endif | |
3185942a | 1884 | init_noninteractive (); |
8c9524f9 | 1885 | expand_aliases = expaliases_flag = interactive_shell = startup_state = 1; |
a0c0a00f | 1886 | #if defined (HISTORY) |
8868edaf | 1887 | remember_on_history = enable_history_list; /* XXX */ |
a0c0a00f | 1888 | #endif |
3185942a JA |
1889 | } |
1890 | ||
d166f048 JA |
1891 | void |
1892 | get_current_user_info () | |
1893 | { | |
1894 | struct passwd *entry; | |
1895 | ||
1896 | /* Don't fetch this more than once. */ | |
1897 | if (current_user.user_name == 0) | |
1898 | { | |
ac50fbac CR |
1899 | #if defined (__TANDEM) |
1900 | entry = getpwnam (getlogin ()); | |
1901 | #else | |
d166f048 | 1902 | entry = getpwuid (current_user.uid); |
ac50fbac | 1903 | #endif |
d166f048 JA |
1904 | if (entry) |
1905 | { | |
1906 | current_user.user_name = savestring (entry->pw_name); | |
1907 | current_user.shell = (entry->pw_shell && entry->pw_shell[0]) | |
1908 | ? savestring (entry->pw_shell) | |
1909 | : savestring ("/bin/sh"); | |
1910 | current_user.home_dir = savestring (entry->pw_dir); | |
1911 | } | |
1912 | else | |
1913 | { | |
b80f6443 JA |
1914 | current_user.user_name = _("I have no name!"); |
1915 | current_user.user_name = savestring (current_user.user_name); | |
d166f048 JA |
1916 | current_user.shell = savestring ("/bin/sh"); |
1917 | current_user.home_dir = savestring ("/"); | |
1918 | } | |
a0c0a00f | 1919 | #if defined (HAVE_GETPWENT) |
d166f048 | 1920 | endpwent (); |
a0c0a00f | 1921 | #endif |
d166f048 JA |
1922 | } |
1923 | } | |
1924 | ||
726f6388 JA |
1925 | /* Do whatever is necessary to initialize the shell. |
1926 | Put new initializations in here. */ | |
1927 | static void | |
1928 | shell_initialize () | |
1929 | { | |
ccc6cda3 | 1930 | char hostname[256]; |
a0c0a00f | 1931 | int should_be_restricted; |
ccc6cda3 | 1932 | |
726f6388 | 1933 | /* Line buffer output for stderr and stdout. */ |
cce855bc | 1934 | if (shell_initialized == 0) |
cce855bc | 1935 | { |
bb70624e JA |
1936 | sh_setlinebuf (stderr); |
1937 | sh_setlinebuf (stdout); | |
cce855bc | 1938 | } |
726f6388 JA |
1939 | |
1940 | /* Sort the array of shell builtins so that the binary search in | |
1941 | find_shell_builtin () works correctly. */ | |
1942 | initialize_shell_builtins (); | |
1943 | ||
1944 | /* Initialize the trap signal handlers before installing our own | |
1945 | signal handlers. traps.c:restore_original_signals () is responsible | |
1946 | for restoring the original default signal handlers. That function | |
1947 | is called when we make a new child. */ | |
1948 | initialize_traps (); | |
7117c2d2 | 1949 | initialize_signals (0); |
726f6388 | 1950 | |
ccc6cda3 JA |
1951 | /* It's highly unlikely that this will change. */ |
1952 | if (current_host_name == 0) | |
1953 | { | |
d166f048 | 1954 | /* Initialize current_host_name. */ |
ccc6cda3 JA |
1955 | if (gethostname (hostname, 255) < 0) |
1956 | current_host_name = "??host??"; | |
1957 | else | |
1958 | current_host_name = savestring (hostname); | |
1959 | } | |
1960 | ||
d166f048 JA |
1961 | /* Initialize the stuff in current_user that comes from the password |
1962 | file. We don't need to do this right away if the shell is not | |
1963 | interactive. */ | |
1964 | if (interactive_shell) | |
1965 | get_current_user_info (); | |
726f6388 JA |
1966 | |
1967 | /* Initialize our interface to the tilde expander. */ | |
1968 | tilde_initialize (); | |
1969 | ||
a0c0a00f CR |
1970 | #if defined (RESTRICTED_SHELL) |
1971 | should_be_restricted = shell_is_restricted (shell_name); | |
1972 | #endif | |
1973 | ||
ccc6cda3 JA |
1974 | /* Initialize internal and environment variables. Don't import shell |
1975 | functions from the environment if we are running in privileged or | |
1976 | restricted mode or if the shell is running setuid. */ | |
1977 | #if defined (RESTRICTED_SHELL) | |
a0c0a00f | 1978 | initialize_shell_variables (shell_environment, privileged_mode||restricted||should_be_restricted||running_setuid); |
ccc6cda3 JA |
1979 | #else |
1980 | initialize_shell_variables (shell_environment, privileged_mode||running_setuid); | |
1981 | #endif | |
726f6388 | 1982 | |
726f6388 | 1983 | /* Initialize the data structures for storing and running jobs. */ |
ac50fbac | 1984 | initialize_job_control (jobs_m_flag); |
726f6388 JA |
1985 | |
1986 | /* Initialize input streams to null. */ | |
1987 | initialize_bash_input (); | |
ccc6cda3 | 1988 | |
7117c2d2 JA |
1989 | initialize_flags (); |
1990 | ||
cce855bc | 1991 | /* Initialize the shell options. Don't import the shell options |
495aee44 CR |
1992 | from the environment variables $SHELLOPTS or $BASHOPTS if we are |
1993 | running in privileged or restricted mode or if the shell is running | |
1994 | setuid. */ | |
cce855bc | 1995 | #if defined (RESTRICTED_SHELL) |
a0c0a00f CR |
1996 | initialize_shell_options (privileged_mode||restricted||should_be_restricted||running_setuid); |
1997 | initialize_bashopts (privileged_mode||restricted||should_be_restricted||running_setuid); | |
cce855bc JA |
1998 | #else |
1999 | initialize_shell_options (privileged_mode||running_setuid); | |
0001803f | 2000 | initialize_bashopts (privileged_mode||running_setuid); |
cce855bc | 2001 | #endif |
726f6388 JA |
2002 | } |
2003 | ||
2004 | /* Function called by main () when it appears that the shell has already | |
2005 | had some initialization performed. This is supposed to reset the world | |
2006 | back to a pristine state, as if we had been exec'ed. */ | |
2007 | static void | |
2008 | shell_reinitialize () | |
2009 | { | |
2010 | /* The default shell prompts. */ | |
2011 | primary_prompt = PPROMPT; | |
2012 | secondary_prompt = SPROMPT; | |
2013 | ||
2014 | /* Things that get 1. */ | |
2015 | current_command_number = 1; | |
2016 | ||
2017 | /* We have decided that the ~/.bashrc file should not be executed | |
2018 | for the invocation of each shell script. If the variable $ENV | |
2019 | (or $BASH_ENV) is set, its value is used as the name of a file | |
2020 | to source. */ | |
2021 | no_rc = no_profile = 1; | |
2022 | ||
2023 | /* Things that get 0. */ | |
2024 | login_shell = make_login_shell = interactive = executing = 0; | |
2025 | debugging = do_version = line_number = last_command_exit_value = 0; | |
a0c0a00f CR |
2026 | forced_interactive = interactive_shell = 0; |
2027 | subshell_environment = running_in_background = 0; | |
8c9524f9 | 2028 | expand_aliases = expaliases_flag = 0; |
d233b485 | 2029 | bash_argv_initialized = 0; |
726f6388 | 2030 | |
ac50fbac CR |
2031 | /* XXX - should we set jobs_m_flag to 0 here? */ |
2032 | ||
726f6388 | 2033 | #if defined (HISTORY) |
a0c0a00f | 2034 | bash_history_reinit (enable_history_list = 0); |
726f6388 JA |
2035 | #endif /* HISTORY */ |
2036 | ||
2037 | #if defined (RESTRICTED_SHELL) | |
2038 | restricted = 0; | |
2039 | #endif /* RESTRICTED_SHELL */ | |
2040 | ||
2041 | /* Ensure that the default startup file is used. (Except that we don't | |
2042 | execute this file for reinitialized shells). */ | |
a0c0a00f | 2043 | bashrc_file = DEFAULT_BASHRC; |
726f6388 JA |
2044 | |
2045 | /* Delete all variables and functions. They will be reinitialized when | |
2046 | the environment is parsed. */ | |
7117c2d2 | 2047 | delete_all_contexts (shell_variables); |
726f6388 JA |
2048 | delete_all_variables (shell_functions); |
2049 | ||
3185942a JA |
2050 | reinit_special_variables (); |
2051 | ||
2052 | #if defined (READLINE) | |
2053 | bashline_reinitialize (); | |
2054 | #endif | |
2055 | ||
28ef6c31 | 2056 | shell_reinitialized = 1; |
726f6388 JA |
2057 | } |
2058 | ||
726f6388 | 2059 | static void |
d166f048 | 2060 | show_shell_usage (fp, extra) |
ccc6cda3 | 2061 | FILE *fp; |
d166f048 | 2062 | int extra; |
726f6388 | 2063 | { |
ccc6cda3 JA |
2064 | int i; |
2065 | char *set_opts, *s, *t; | |
2066 | ||
d166f048 | 2067 | if (extra) |
3185942a | 2068 | fprintf (fp, _("GNU bash, version %s-(%s)\n"), shell_version_string (), MACHTYPE); |
b80f6443 | 2069 | fprintf (fp, _("Usage:\t%s [GNU long option] [option] ...\n\t%s [GNU long option] [option] script-file ...\n"), |
ccc6cda3 | 2070 | shell_name, shell_name); |
b80f6443 | 2071 | fputs (_("GNU long options:\n"), fp); |
ccc6cda3 JA |
2072 | for (i = 0; long_args[i].name; i++) |
2073 | fprintf (fp, "\t--%s\n", long_args[i].name); | |
2074 | ||
b80f6443 | 2075 | fputs (_("Shell options:\n"), fp); |
ac50fbac | 2076 | fputs (_("\t-ilrsD or -c command or -O shopt_option\t\t(invocation only)\n"), fp); |
ccc6cda3 JA |
2077 | |
2078 | for (i = 0, set_opts = 0; shell_builtins[i].name; i++) | |
2079 | if (STREQ (shell_builtins[i].name, "set")) | |
d233b485 CR |
2080 | { |
2081 | set_opts = savestring (shell_builtins[i].short_doc); | |
2082 | break; | |
2083 | } | |
2084 | ||
ccc6cda3 | 2085 | if (set_opts) |
726f6388 | 2086 | { |
0001803f | 2087 | s = strchr (set_opts, '['); |
ccc6cda3 JA |
2088 | if (s == 0) |
2089 | s = set_opts; | |
2090 | while (*++s == '-') | |
2091 | ; | |
0001803f | 2092 | t = strchr (s, ']'); |
ccc6cda3 JA |
2093 | if (t) |
2094 | *t = '\0'; | |
b80f6443 | 2095 | fprintf (fp, _("\t-%s or -o option\n"), s); |
ccc6cda3 | 2096 | free (set_opts); |
726f6388 JA |
2097 | } |
2098 | ||
d166f048 JA |
2099 | if (extra) |
2100 | { | |
b80f6443 JA |
2101 | fprintf (fp, _("Type `%s -c \"help set\"' for more information about shell options.\n"), shell_name); |
2102 | fprintf (fp, _("Type `%s -c help' for more information about shell builtin commands.\n"), shell_name); | |
2103 | fprintf (fp, _("Use the `bashbug' command to report bugs.\n")); | |
a0c0a00f CR |
2104 | fprintf (fp, "\n"); |
2105 | fprintf (fp, _("bash home page: <http://www.gnu.org/software/bash>\n")); | |
2106 | fprintf (fp, _("General help using GNU software: <http://www.gnu.org/gethelp/>\n")); | |
d166f048 | 2107 | } |
726f6388 JA |
2108 | } |
2109 | ||
f73dda09 JA |
2110 | static void |
2111 | add_shopt_to_alist (opt, on_or_off) | |
2112 | char *opt; | |
2113 | int on_or_off; | |
2114 | { | |
2115 | if (shopt_ind >= shopt_len) | |
2116 | { | |
2117 | shopt_len += 8; | |
2118 | shopt_alist = (STRING_INT_ALIST *)xrealloc (shopt_alist, shopt_len * sizeof (shopt_alist[0])); | |
2119 | } | |
2120 | shopt_alist[shopt_ind].word = opt; | |
2121 | shopt_alist[shopt_ind].token = on_or_off; | |
2122 | shopt_ind++; | |
2123 | } | |
2124 | ||
2125 | static void | |
2126 | run_shopt_alist () | |
2127 | { | |
2128 | register int i; | |
2129 | ||
2130 | for (i = 0; i < shopt_ind; i++) | |
2131 | if (shopt_setopt (shopt_alist[i].word, (shopt_alist[i].token == '-')) != EXECUTION_SUCCESS) | |
b80f6443 | 2132 | exit (EX_BADUSAGE); |
f73dda09 JA |
2133 | free (shopt_alist); |
2134 | shopt_alist = 0; | |
2135 | shopt_ind = shopt_len = 0; | |
2136 | } |