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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 | |
09767ff0 | 3 | /* Copyright (C) 1987-2008 Free Software Foundation, Inc. |
726f6388 | 4 | |
bb70624e | 5 | This file is part of GNU Bash, the Bourne Again SHell. |
726f6388 | 6 | |
bb70624e JA |
7 | Bash is free software; you can redistribute it and/or modify it |
8 | under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
726f6388 JA |
11 | |
12 | Bash is distributed in the hope that it will be useful, but WITHOUT | |
bb70624e JA |
13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
15 | License for more details. | |
726f6388 | 16 | |
bb70624e JA |
17 | You should have received a copy of the GNU General Public License |
18 | along with Bash; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. | |
726f6388 JA |
20 | |
21 | Birthdate: | |
22 | Sunday, January 10th, 1988. | |
23 | Initial author: Brian Fox | |
24 | */ | |
25 | #define INSTALL_DEBUG_MODE | |
26 | ||
ccc6cda3 JA |
27 | #include "config.h" |
28 | ||
726f6388 | 29 | #include "bashtypes.h" |
d3a24ed2 | 30 | #if !defined (_MINIX) && defined (HAVE_SYS_FILE_H) |
cce855bc JA |
31 | # include <sys/file.h> |
32 | #endif | |
ccc6cda3 | 33 | #include "posixstat.h" |
f73dda09 | 34 | #include "posixtime.h" |
ccc6cda3 | 35 | #include "bashansi.h" |
726f6388 JA |
36 | #include <stdio.h> |
37 | #include <signal.h> | |
38 | #include <errno.h> | |
726f6388 JA |
39 | #include "filecntl.h" |
40 | #include <pwd.h> | |
726f6388 | 41 | |
ccc6cda3 JA |
42 | #if defined (HAVE_UNISTD_H) |
43 | # include <unistd.h> | |
726f6388 JA |
44 | #endif |
45 | ||
5e13499c CR |
46 | #include "bashintl.h" |
47 | ||
f73dda09 JA |
48 | #define NEED_SH_SETLINEBUF_DECL /* used in externs.h */ |
49 | ||
726f6388 JA |
50 | #include "shell.h" |
51 | #include "flags.h" | |
ccc6cda3 JA |
52 | #include "trap.h" |
53 | #include "mailcheck.h" | |
54 | #include "builtins.h" | |
55 | #include "builtins/common.h" | |
726f6388 JA |
56 | |
57 | #if defined (JOB_CONTROL) | |
58 | #include "jobs.h" | |
59 | #endif /* JOB_CONTROL */ | |
60 | ||
61 | #include "input.h" | |
62 | #include "execute_cmd.h" | |
cce855bc | 63 | #include "findcmd.h" |
726f6388 | 64 | |
7117c2d2 JA |
65 | #if defined (USING_BASH_MALLOC) && defined (DEBUG) && !defined (DISABLE_MALLOC_WRAPPERS) |
66 | # include <malloc/shmalloc.h> | |
67 | #endif | |
68 | ||
726f6388 JA |
69 | #if defined (HISTORY) |
70 | # include "bashhist.h" | |
71 | # include <readline/history.h> | |
72 | #endif | |
73 | ||
33fe8777 CR |
74 | #if defined (READLINE) |
75 | # include "bashline.h" | |
76 | #endif | |
77 | ||
726f6388 | 78 | #include <tilde/tilde.h> |
f73dda09 | 79 | #include <glob/strmatch.h> |
726f6388 | 80 | |
b72432fd JA |
81 | #if defined (__OPENNT) |
82 | # include <opennt/opennt.h> | |
83 | #endif | |
84 | ||
ccc6cda3 | 85 | #if !defined (HAVE_GETPW_DECLS) |
726f6388 | 86 | extern struct passwd *getpwuid (); |
ccc6cda3 | 87 | #endif /* !HAVE_GETPW_DECLS */ |
726f6388 | 88 | |
726f6388 JA |
89 | #if !defined (errno) |
90 | extern int errno; | |
91 | #endif | |
92 | ||
b72432fd JA |
93 | #if defined (NO_MAIN_ENV_ARG) |
94 | extern char **environ; /* used if no third argument to main() */ | |
95 | #endif | |
96 | ||
ccc6cda3 | 97 | extern char *dist_version, *release_status; |
726f6388 | 98 | extern int patch_level, build_version; |
bb70624e | 99 | extern int shell_level; |
ccc6cda3 | 100 | extern int subshell_environment; |
726f6388 | 101 | extern int last_command_exit_value; |
ccc6cda3 | 102 | extern int line_number; |
ccc6cda3 | 103 | extern int expand_aliases; |
cce855bc | 104 | extern int array_needs_making; |
01ed5ba4 CR |
105 | extern int gnu_error_format; |
106 | extern char *primary_prompt, *secondary_prompt; | |
107 | extern char *this_command_name; | |
726f6388 JA |
108 | |
109 | /* Non-zero means that this shell has already been run; i.e. you should | |
110 | call shell_reinitialize () if you need to start afresh. */ | |
ccc6cda3 | 111 | int shell_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 | ||
d3ad40de CR |
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 */ | |
57a07124 | 150 | int autocd = 0; |
d3ad40de | 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; | |
160 | ||
161 | /* Special debugging helper. */ | |
162 | int debugging_login_shell = 0; | |
163 | ||
164 | /* The environment that the shell passes to other commands. */ | |
165 | char **shell_environment; | |
166 | ||
167 | /* Non-zero when we are executing a top-level command. */ | |
168 | int executing = 0; | |
169 | ||
170 | /* The number of commands executed so far. */ | |
171 | int current_command_number = 1; | |
172 | ||
726f6388 JA |
173 | /* Non-zero is the recursion depth for commands. */ |
174 | int indirection_level = 0; | |
175 | ||
726f6388 JA |
176 | /* The name of this shell, as taken from argv[0]. */ |
177 | char *shell_name = (char *)NULL; | |
178 | ||
179 | /* time in seconds when the shell was started */ | |
180 | time_t shell_start_time; | |
181 | ||
ccc6cda3 JA |
182 | /* Are we running in an emacs shell window? */ |
183 | int running_under_emacs; | |
184 | ||
d3ad40de CR |
185 | /* Do we have /dev/fd? */ |
186 | #ifdef HAVE_DEV_FD | |
187 | int have_devfd = HAVE_DEV_FD; | |
188 | #else | |
189 | int have_devfd = 0; | |
190 | #endif | |
191 | ||
726f6388 JA |
192 | /* The name of the .(shell)rc file. */ |
193 | static char *bashrc_file = "~/.bashrc"; | |
194 | ||
195 | /* Non-zero means to act more like the Bourne shell on startup. */ | |
ccc6cda3 JA |
196 | static int act_like_sh; |
197 | ||
198 | /* Non-zero if this shell is being run by `su'. */ | |
199 | static int su_shell; | |
200 | ||
201 | /* Non-zero if we have already expanded and sourced $ENV. */ | |
202 | static int sourced_env; | |
203 | ||
204 | /* Is this shell running setuid? */ | |
205 | static int running_setuid; | |
726f6388 JA |
206 | |
207 | /* Values for the long-winded argument names. */ | |
ccc6cda3 JA |
208 | static int debugging; /* Do debugging things. */ |
209 | static int no_rc; /* Don't execute ~/.bashrc */ | |
210 | static int no_profile; /* Don't execute .profile */ | |
211 | static int do_version; /* Display interesting version info. */ | |
212 | static int make_login_shell; /* Make this shell be a `-bash' shell. */ | |
213 | static int want_initial_help; /* --help option */ | |
726f6388 | 214 | |
d3a24ed2 | 215 | int debugging_mode = 0; /* In debugging mode with --debugger */ |
726f6388 | 216 | int no_line_editing = 0; /* Don't do fancy line editing. */ |
ccc6cda3 | 217 | int dump_translatable_strings; /* Dump strings in $"...", don't execute. */ |
cce855bc JA |
218 | int dump_po_strings; /* Dump strings in $"..." in po format */ |
219 | int wordexp_only = 0; /* Do word expansion only */ | |
5e13499c | 220 | int protected_mode = 0; /* No command substitution with --wordexp */ |
726f6388 | 221 | |
7790f917 CR |
222 | #if defined (STRICT_POSIX) |
223 | int posixly_correct = 1; /* Non-zero means posix.2 superset. */ | |
224 | #else | |
225 | int posixly_correct = 0; /* Non-zero means posix.2 superset. */ | |
226 | #endif | |
227 | ||
228 | ||
726f6388 JA |
229 | /* Some long-winded argument names. These are obviously new. */ |
230 | #define Int 1 | |
231 | #define Charp 2 | |
d3ad40de CR |
232 | static const struct { |
233 | const char *name; | |
726f6388 JA |
234 | int type; |
235 | int *int_value; | |
236 | char **char_value; | |
237 | } long_args[] = { | |
238 | { "debug", Int, &debugging, (char **)0x0 }, | |
d3a24ed2 CR |
239 | #if defined (DEBUGGER) |
240 | { "debugger", Int, &debugging_mode, (char **)0x0 }, | |
241 | #endif | |
cce855bc | 242 | { "dump-po-strings", Int, &dump_po_strings, (char **)0x0 }, |
ccc6cda3 JA |
243 | { "dump-strings", Int, &dump_translatable_strings, (char **)0x0 }, |
244 | { "help", Int, &want_initial_help, (char **)0x0 }, | |
28ef6c31 | 245 | { "init-file", Charp, (int *)0x0, &bashrc_file }, |
ccc6cda3 JA |
246 | { "login", Int, &make_login_shell, (char **)0x0 }, |
247 | { "noediting", Int, &no_line_editing, (char **)0x0 }, | |
726f6388 | 248 | { "noprofile", Int, &no_profile, (char **)0x0 }, |
ccc6cda3 JA |
249 | { "norc", Int, &no_rc, (char **)0x0 }, |
250 | { "posix", Int, &posixly_correct, (char **)0x0 }, | |
5e13499c | 251 | { "protected", Int, &protected_mode, (char **)0x0 }, |
726f6388 | 252 | { "rcfile", Charp, (int *)0x0, &bashrc_file }, |
ccc6cda3 JA |
253 | #if defined (RESTRICTED_SHELL) |
254 | { "restricted", Int, &restricted, (char **)0x0 }, | |
255 | #endif | |
256 | { "verbose", Int, &echo_input_at_read, (char **)0x0 }, | |
726f6388 | 257 | { "version", Int, &do_version, (char **)0x0 }, |
cce855bc | 258 | { "wordexp", Int, &wordexp_only, (char **)0x0 }, |
726f6388 JA |
259 | { (char *)0x0, Int, (int *)0x0, (char **)0x0 } |
260 | }; | |
261 | ||
262 | /* These are extern so execute_simple_command can set them, and then | |
263 | longjmp back to main to execute a shell script, instead of calling | |
264 | main () again and resulting in indefinite, possibly fatal, stack | |
265 | growth. */ | |
ccc6cda3 | 266 | procenv_t subshell_top_level; |
726f6388 JA |
267 | int subshell_argc; |
268 | char **subshell_argv; | |
269 | char **subshell_envp; | |
270 | ||
271 | #if defined (BUFFERED_INPUT) | |
272 | /* The file descriptor from which the shell is reading input. */ | |
273 | int default_buffered_input = -1; | |
274 | #endif | |
275 | ||
bb70624e JA |
276 | /* The following two variables are not static so they can show up in $-. */ |
277 | int read_from_stdin; /* -s flag supplied */ | |
278 | int want_pending_command; /* -c flag supplied */ | |
279 | ||
d3a24ed2 CR |
280 | /* This variable is not static so it can be bound to $BASH_EXECUTION_STRING */ |
281 | char *command_execution_string; /* argument to -c option */ | |
282 | ||
7117c2d2 JA |
283 | int malloc_trace_at_exit = 0; |
284 | ||
28ef6c31 | 285 | static int shell_reinitialized = 0; |
726f6388 | 286 | |
ccc6cda3 JA |
287 | static FILE *default_input; |
288 | ||
f73dda09 JA |
289 | static STRING_INT_ALIST *shopt_alist; |
290 | static int shopt_ind = 0, shopt_len = 0; | |
291 | ||
292 | static int parse_long_options __P((char **, int, int)); | |
293 | static int parse_shell_options __P((char **, int, int)); | |
294 | static int bind_args __P((char **, int, int, int)); | |
295 | ||
d3a24ed2 CR |
296 | static void start_debugger __P((void)); |
297 | ||
f73dda09 JA |
298 | static void add_shopt_to_alist __P((char *, int)); |
299 | static void run_shopt_alist __P((void)); | |
ccc6cda3 | 300 | |
f73dda09 JA |
301 | static void execute_env_file __P((char *)); |
302 | static void run_startup_files __P((void)); | |
303 | static int open_shell_script __P((char *)); | |
304 | static void set_bash_input __P((void)); | |
305 | static int run_one_command __P((char *)); | |
306 | static int run_wordexp __P((char *)); | |
726f6388 | 307 | |
f73dda09 | 308 | static int uidget __P((void)); |
726f6388 | 309 | |
f73dda09 JA |
310 | static void init_interactive __P((void)); |
311 | static void init_noninteractive __P((void)); | |
b0c16657 | 312 | static void init_interactive_script __P((void)); |
f73dda09 JA |
313 | |
314 | static void set_shell_name __P((char *)); | |
315 | static void shell_initialize __P((void)); | |
316 | static void shell_reinitialize __P((void)); | |
317 | ||
318 | static void show_shell_usage __P((FILE *, int)); | |
ccc6cda3 | 319 | |
28ef6c31 | 320 | #ifdef __CYGWIN__ |
cce855bc JA |
321 | static void |
322 | _cygwin32_check_tmp () | |
323 | { | |
324 | struct stat sb; | |
325 | ||
326 | if (stat ("/tmp", &sb) < 0) | |
5e13499c | 327 | internal_warning (_("could not find /tmp, please create!")); |
cce855bc JA |
328 | else |
329 | { | |
330 | if (S_ISDIR (sb.st_mode) == 0) | |
5e13499c | 331 | internal_warning (_("/tmp must be a valid directory name")); |
cce855bc JA |
332 | } |
333 | } | |
28ef6c31 | 334 | #endif /* __CYGWIN__ */ |
cce855bc | 335 | |
b72432fd JA |
336 | #if defined (NO_MAIN_ENV_ARG) |
337 | /* systems without third argument to main() */ | |
338 | int | |
339 | main (argc, argv) | |
340 | int argc; | |
341 | char **argv; | |
342 | #else /* !NO_MAIN_ENV_ARG */ | |
ccc6cda3 | 343 | int |
726f6388 JA |
344 | main (argc, argv, env) |
345 | int argc; | |
346 | char **argv, **env; | |
b72432fd | 347 | #endif /* !NO_MAIN_ENV_ARG */ |
726f6388 JA |
348 | { |
349 | register int i; | |
f73dda09 JA |
350 | int code, old_errexit_flag; |
351 | #if defined (RESTRICTED_SHELL) | |
352 | int saverst; | |
353 | #endif | |
ccc6cda3 JA |
354 | volatile int locally_skip_execution; |
355 | volatile int arg_index, top_level_arg_index; | |
b72432fd JA |
356 | #ifdef __OPENNT |
357 | char **env; | |
358 | ||
359 | env = environ; | |
360 | #endif /* __OPENNT */ | |
ccc6cda3 | 361 | |
f73dda09 JA |
362 | USE_VAR(argc); |
363 | USE_VAR(argv); | |
364 | USE_VAR(env); | |
365 | USE_VAR(code); | |
366 | USE_VAR(old_errexit_flag); | |
367 | #if defined (RESTRICTED_SHELL) | |
368 | USE_VAR(saverst); | |
369 | #endif | |
370 | ||
ccc6cda3 JA |
371 | /* Catch early SIGINTs. */ |
372 | code = setjmp (top_level); | |
373 | if (code) | |
374 | exit (2); | |
375 | ||
7117c2d2 JA |
376 | #if defined (USING_BASH_MALLOC) && defined (DEBUG) && !defined (DISABLE_MALLOC_WRAPPERS) |
377 | # if 1 | |
f73dda09 JA |
378 | malloc_set_register (1); |
379 | # endif | |
380 | #endif | |
381 | ||
ccc6cda3 | 382 | check_dev_tty (); |
726f6388 | 383 | |
28ef6c31 | 384 | #ifdef __CYGWIN__ |
cce855bc | 385 | _cygwin32_check_tmp (); |
28ef6c31 | 386 | #endif /* __CYGWIN__ */ |
cce855bc | 387 | |
726f6388 | 388 | /* Wait forever if we are debugging a login shell. */ |
fd3925f1 | 389 | while (debugging_login_shell) sleep (3); |
726f6388 | 390 | |
ccc6cda3 | 391 | set_default_locale (); |
726f6388 | 392 | |
ccc6cda3 | 393 | running_setuid = uidget (); |
726f6388 | 394 | |
28ef6c31 JA |
395 | if (getenv ("POSIXLY_CORRECT") || getenv ("POSIX_PEDANTIC")) |
396 | posixly_correct = 1; | |
726f6388 JA |
397 | |
398 | #if defined (USE_GNU_MALLOC_LIBRARY) | |
399 | mcheck (programming_error, (void (*) ())0); | |
400 | #endif /* USE_GNU_MALLOC_LIBRARY */ | |
401 | ||
402 | if (setjmp (subshell_top_level)) | |
403 | { | |
404 | argc = subshell_argc; | |
405 | argv = subshell_argv; | |
406 | env = subshell_envp; | |
407 | sourced_env = 0; | |
408 | } | |
409 | ||
28ef6c31 JA |
410 | shell_reinitialized = 0; |
411 | ||
ccc6cda3 | 412 | /* Initialize `local' variables for all `invocations' of main (). */ |
726f6388 | 413 | arg_index = 1; |
fd3925f1 CR |
414 | if (arg_index > argc) |
415 | arg_index = argc; | |
d3a24ed2 | 416 | command_execution_string = (char *)NULL; |
ccc6cda3 | 417 | want_pending_command = locally_skip_execution = read_from_stdin = 0; |
726f6388 JA |
418 | default_input = stdin; |
419 | #if defined (BUFFERED_INPUT) | |
420 | default_buffered_input = -1; | |
421 | #endif | |
422 | ||
423 | /* Fix for the `infinite process creation' bug when running shell scripts | |
424 | from startup files on System V. */ | |
425 | login_shell = make_login_shell = 0; | |
426 | ||
427 | /* If this shell has already been run, then reinitialize it to a | |
428 | vanilla state. */ | |
429 | if (shell_initialized || shell_name) | |
430 | { | |
431 | /* Make sure that we do not infinitely recurse as a login shell. */ | |
432 | if (*shell_name == '-') | |
433 | shell_name++; | |
434 | ||
435 | shell_reinitialize (); | |
436 | if (setjmp (top_level)) | |
437 | exit (2); | |
438 | } | |
439 | ||
726f6388 | 440 | shell_environment = env; |
ccc6cda3 | 441 | set_shell_name (argv[0]); |
726f6388 JA |
442 | shell_start_time = NOW; /* NOW now defined in general.h */ |
443 | ||
726f6388 JA |
444 | /* Parse argument flags from the input line. */ |
445 | ||
446 | /* Find full word arguments first. */ | |
ccc6cda3 JA |
447 | arg_index = parse_long_options (argv, arg_index, argc); |
448 | ||
449 | if (want_initial_help) | |
726f6388 | 450 | { |
d166f048 | 451 | show_shell_usage (stdout, 1); |
ccc6cda3 | 452 | exit (EXECUTION_SUCCESS); |
726f6388 JA |
453 | } |
454 | ||
ccc6cda3 JA |
455 | if (do_version) |
456 | { | |
457 | show_shell_version (1); | |
458 | exit (EXECUTION_SUCCESS); | |
459 | } | |
726f6388 | 460 | |
7117c2d2 JA |
461 | /* All done with full word options; do standard shell option parsing.*/ |
462 | this_command_name = shell_name; /* for error reporting */ | |
463 | arg_index = parse_shell_options (argv, arg_index, argc); | |
464 | ||
465 | /* If user supplied the "--login" (or -l) flag, then set and invert | |
466 | LOGIN_SHELL. */ | |
726f6388 JA |
467 | if (make_login_shell) |
468 | { | |
469 | login_shell++; | |
470 | login_shell = -login_shell; | |
471 | } | |
472 | ||
f73dda09 JA |
473 | set_login_shell (login_shell != 0); |
474 | ||
cce855bc JA |
475 | if (dump_po_strings) |
476 | dump_translatable_strings = 1; | |
477 | ||
ccc6cda3 JA |
478 | if (dump_translatable_strings) |
479 | read_but_dont_execute = 1; | |
726f6388 | 480 | |
ccc6cda3 JA |
481 | if (running_setuid && privileged_mode == 0) |
482 | disable_priv_mode (); | |
726f6388 JA |
483 | |
484 | /* Need to get the argument to a -c option processed in the | |
485 | above loop. The next arg is a command to execute, and the | |
486 | following args are $0...$n respectively. */ | |
487 | if (want_pending_command) | |
488 | { | |
d3a24ed2 CR |
489 | command_execution_string = argv[arg_index]; |
490 | if (command_execution_string == 0) | |
726f6388 | 491 | { |
5e13499c | 492 | report_error (_("%s: option requires an argument"), "-c"); |
d3a24ed2 | 493 | exit (EX_BADUSAGE); |
726f6388 JA |
494 | } |
495 | arg_index++; | |
496 | } | |
ccc6cda3 | 497 | this_command_name = (char *)NULL; |
726f6388 | 498 | |
7117c2d2 JA |
499 | cmd_init(); /* initialize the command object caches */ |
500 | ||
726f6388 JA |
501 | /* First, let the outside world know about our interactive status. |
502 | A shell is interactive if the `-i' flag was given, or if all of | |
503 | the following conditions are met: | |
504 | no -c command | |
505 | no arguments remaining or the -s flag given | |
506 | standard input is a terminal | |
da5b17cd | 507 | standard error is a terminal |
726f6388 JA |
508 | Refer to Posix.2, the description of the `sh' utility. */ |
509 | ||
510 | if (forced_interactive || /* -i flag */ | |
d3a24ed2 | 511 | (!command_execution_string && /* No -c command and ... */ |
cce855bc | 512 | wordexp_only == 0 && /* No --wordexp and ... */ |
726f6388 JA |
513 | ((arg_index == argc) || /* no remaining args or... */ |
514 | read_from_stdin) && /* -s flag with args, and */ | |
515 | isatty (fileno (stdin)) && /* Input is a terminal and */ | |
da5b17cd | 516 | isatty (fileno (stderr)))) /* error output is a terminal. */ |
ccc6cda3 | 517 | init_interactive (); |
726f6388 | 518 | else |
ccc6cda3 | 519 | init_noninteractive (); |
726f6388 JA |
520 | |
521 | #define CLOSE_FDS_AT_LOGIN | |
522 | #if defined (CLOSE_FDS_AT_LOGIN) | |
523 | /* | |
524 | * Some systems have the bad habit of starting login shells with lots of open | |
525 | * file descriptors. For instance, most systems that have picked up the | |
526 | * pre-4.0 Sun YP code leave a file descriptor open each time you call one | |
527 | * of the getpw* functions, and it's set to be open across execs. That | |
528 | * means one for login, one for xterm, one for shelltool, etc. | |
529 | */ | |
530 | if (login_shell && interactive_shell) | |
531 | { | |
532 | for (i = 3; i < 20; i++) | |
533 | close (i); | |
534 | } | |
535 | #endif /* CLOSE_FDS_AT_LOGIN */ | |
536 | ||
7117c2d2 JA |
537 | /* If we're in a strict Posix.2 mode, turn on interactive comments, |
538 | alias expansion in non-interactive shells, and other Posix.2 things. */ | |
d166f048 JA |
539 | if (posixly_correct) |
540 | { | |
d11b8b46 | 541 | bind_variable ("POSIXLY_CORRECT", "y", 0); |
28ef6c31 | 542 | sv_strict_posix ("POSIXLY_CORRECT"); |
d166f048 JA |
543 | } |
544 | ||
f73dda09 JA |
545 | /* Now we run the shopt_alist and process the options. */ |
546 | if (shopt_alist) | |
547 | run_shopt_alist (); | |
548 | ||
726f6388 JA |
549 | /* From here on in, the shell must be a normal functioning shell. |
550 | Variables from the environment are expected to be set, etc. */ | |
551 | shell_initialize (); | |
552 | ||
d3ad40de | 553 | set_default_lang (); |
ccc6cda3 JA |
554 | set_default_locale_vars (); |
555 | ||
30915f17 CR |
556 | /* |
557 | * M-x term -> TERM=eterm EMACS=22.1 (term:0.96) (eterm) | |
558 | * M-x shell -> TERM=dumb EMACS=t (no line editing) | |
559 | * M-x terminal -> TERM=emacs-em7955 EMACS= (line editing) | |
560 | */ | |
726f6388 JA |
561 | if (interactive_shell) |
562 | { | |
d3a24ed2 | 563 | char *term, *emacs; |
ccc6cda3 | 564 | |
d3a24ed2 | 565 | term = get_string_value ("TERM"); |
d3a24ed2 | 566 | emacs = get_string_value ("EMACS"); |
30915f17 CR |
567 | |
568 | /* Not sure any emacs terminal emulator sets TERM=emacs any more */ | |
569 | no_line_editing |= term && (STREQ (term, "emacs")); | |
d3a24ed2 | 570 | no_line_editing |= emacs && emacs[0] == 't' && emacs[1] == '\0' && STREQ (term, "dumb"); |
30915f17 CR |
571 | |
572 | /* running_under_emacs == 2 for `eterm' */ | |
573 | running_under_emacs = (emacs != 0) || (term && STREQN (term, "emacs", 5)); | |
574 | running_under_emacs += term && STREQN (term, "eterm", 5) && strstr (emacs, "term"); | |
575 | ||
01ed5ba4 CR |
576 | if (running_under_emacs) |
577 | gnu_error_format = 1; | |
726f6388 JA |
578 | } |
579 | ||
580 | top_level_arg_index = arg_index; | |
b72432fd | 581 | old_errexit_flag = exit_immediately_on_error; |
726f6388 | 582 | |
726f6388 JA |
583 | /* Give this shell a place to longjmp to before executing the |
584 | startup files. This allows users to press C-c to abort the | |
585 | lengthy startup. */ | |
ccc6cda3 JA |
586 | code = setjmp (top_level); |
587 | if (code) | |
588 | { | |
d3a24ed2 | 589 | if (code == EXITPROG || code == ERREXIT) |
ccc6cda3 JA |
590 | exit_shell (last_command_exit_value); |
591 | else | |
d166f048 JA |
592 | { |
593 | #if defined (JOB_CONTROL) | |
594 | /* Reset job control, since run_startup_files turned it off. */ | |
595 | set_job_control (interactive_shell); | |
596 | #endif | |
b72432fd JA |
597 | /* Reset value of `set -e', since it's turned off before running |
598 | the startup files. */ | |
599 | exit_immediately_on_error += old_errexit_flag; | |
d166f048 JA |
600 | locally_skip_execution++; |
601 | } | |
ccc6cda3 | 602 | } |
726f6388 JA |
603 | |
604 | arg_index = top_level_arg_index; | |
605 | ||
606 | /* Execute the start-up scripts. */ | |
607 | ||
ccc6cda3 | 608 | if (interactive_shell == 0) |
726f6388 | 609 | { |
7117c2d2 JA |
610 | unbind_variable ("PS1"); |
611 | unbind_variable ("PS2"); | |
28ef6c31 | 612 | interactive = 0; |
7117c2d2 JA |
613 | #if 0 |
614 | /* This has already been done by init_noninteractive */ | |
28ef6c31 | 615 | expand_aliases = posixly_correct; |
7117c2d2 | 616 | #endif |
726f6388 JA |
617 | } |
618 | else | |
619 | { | |
620 | change_flag ('i', FLAG_ON); | |
621 | interactive = 1; | |
622 | } | |
623 | ||
e8ce775d | 624 | #if defined (RESTRICTED_SHELL) |
b72432fd JA |
625 | /* Set restricted_shell based on whether the basename of $0 indicates that |
626 | the shell should be restricted or if the `-r' option was supplied at | |
627 | startup. */ | |
628 | restricted_shell = shell_is_restricted (shell_name); | |
629 | ||
e8ce775d JA |
630 | /* If the `-r' option is supplied at invocation, make sure that the shell |
631 | is not in restricted mode when running the startup files. */ | |
b72432fd JA |
632 | saverst = restricted; |
633 | restricted = 0; | |
e8ce775d JA |
634 | #endif |
635 | ||
b72432fd | 636 | /* The startup files are run with `set -e' temporarily disabled. */ |
ccc6cda3 | 637 | if (locally_skip_execution == 0 && running_setuid == 0) |
b72432fd JA |
638 | { |
639 | old_errexit_flag = exit_immediately_on_error; | |
640 | exit_immediately_on_error = 0; | |
641 | ||
642 | run_startup_files (); | |
b72432fd JA |
643 | exit_immediately_on_error += old_errexit_flag; |
644 | } | |
726f6388 | 645 | |
ccc6cda3 JA |
646 | /* If we are invoked as `sh', turn on Posix mode. */ |
647 | if (act_like_sh) | |
d166f048 | 648 | { |
d11b8b46 | 649 | bind_variable ("POSIXLY_CORRECT", "y", 0); |
28ef6c31 | 650 | sv_strict_posix ("POSIXLY_CORRECT"); |
d166f048 | 651 | } |
ccc6cda3 | 652 | |
726f6388 | 653 | #if defined (RESTRICTED_SHELL) |
cce855bc | 654 | /* Turn on the restrictions after executing the startup files. This |
e8ce775d JA |
655 | means that `bash -r' or `set -r' invoked from a startup file will |
656 | turn on the restrictions after the startup files are executed. */ | |
657 | restricted = saverst || restricted; | |
28ef6c31 JA |
658 | if (shell_reinitialized == 0) |
659 | maybe_make_restricted (shell_name); | |
726f6388 JA |
660 | #endif /* RESTRICTED_SHELL */ |
661 | ||
cce855bc JA |
662 | if (wordexp_only) |
663 | { | |
664 | startup_state = 3; | |
665 | last_command_exit_value = run_wordexp (argv[arg_index]); | |
666 | exit_shell (last_command_exit_value); | |
667 | } | |
668 | ||
d3a24ed2 | 669 | if (command_execution_string) |
ccc6cda3 JA |
670 | { |
671 | arg_index = bind_args (argv, arg_index, argc, 0); | |
ccc6cda3 | 672 | startup_state = 2; |
d3a24ed2 CR |
673 | |
674 | if (debugging_mode) | |
675 | start_debugger (); | |
676 | ||
726f6388 | 677 | #if defined (ONESHOT) |
f73dda09 | 678 | executing = 1; |
d3a24ed2 | 679 | run_one_command (command_execution_string); |
ccc6cda3 | 680 | exit_shell (last_command_exit_value); |
726f6388 | 681 | #else /* ONESHOT */ |
d3a24ed2 | 682 | with_input_from_string (command_execution_string, "-c"); |
ccc6cda3 | 683 | goto read_and_execute; |
726f6388 | 684 | #endif /* !ONESHOT */ |
ccc6cda3 JA |
685 | } |
686 | ||
687 | /* Get possible input filename and set up default_buffered_input or | |
688 | default_input as appropriate. */ | |
689 | if (arg_index != argc && read_from_stdin == 0) | |
690 | { | |
691 | open_shell_script (argv[arg_index]); | |
692 | arg_index++; | |
693 | } | |
694 | else if (interactive == 0) | |
695 | /* In this mode, bash is reading a script from stdin, which is a | |
696 | pipe or redirected file. */ | |
697 | #if defined (BUFFERED_INPUT) | |
698 | default_buffered_input = fileno (stdin); /* == 0 */ | |
699 | #else | |
700 | setbuf (default_input, (char *)NULL); | |
701 | #endif /* !BUFFERED_INPUT */ | |
702 | ||
703 | set_bash_input (); | |
704 | ||
705 | /* Bind remaining args to $1 ... $n */ | |
706 | arg_index = bind_args (argv, arg_index, argc, 1); | |
d3a24ed2 CR |
707 | |
708 | if (debugging_mode && locally_skip_execution == 0 && running_setuid == 0) | |
709 | start_debugger (); | |
710 | ||
726f6388 JA |
711 | /* Do the things that should be done only for interactive shells. */ |
712 | if (interactive_shell) | |
713 | { | |
714 | /* Set up for checking for presence of mail. */ | |
726f6388 | 715 | reset_mail_timer (); |
d3ad40de | 716 | init_mail_dates (); |
726f6388 JA |
717 | |
718 | #if defined (HISTORY) | |
719 | /* Initialize the interactive history stuff. */ | |
ccc6cda3 | 720 | bash_initialize_history (); |
7117c2d2 JA |
721 | /* Don't load the history from the history file if we've already |
722 | saved some lines in this session (e.g., by putting `history -s xx' | |
723 | into one of the startup files). */ | |
724 | if (shell_initialized == 0 && history_lines_this_session == 0) | |
726f6388 JA |
725 | load_history (); |
726 | #endif /* HISTORY */ | |
727 | ||
728 | /* Initialize terminal state for interactive shells after the | |
729 | .bash_profile and .bashrc are interpreted. */ | |
730 | get_tty_state (); | |
731 | } | |
732 | ||
ccc6cda3 JA |
733 | #if !defined (ONESHOT) |
734 | read_and_execute: | |
735 | #endif /* !ONESHOT */ | |
726f6388 | 736 | |
ccc6cda3 | 737 | shell_initialized = 1; |
726f6388 | 738 | |
ccc6cda3 JA |
739 | /* Read commands until exit condition. */ |
740 | reader_loop (); | |
741 | exit_shell (last_command_exit_value); | |
742 | } | |
726f6388 | 743 | |
ccc6cda3 JA |
744 | static int |
745 | parse_long_options (argv, arg_start, arg_end) | |
746 | char **argv; | |
747 | int arg_start, arg_end; | |
748 | { | |
749 | int arg_index, longarg, i; | |
750 | char *arg_string; | |
751 | ||
752 | arg_index = arg_start; | |
753 | while ((arg_index != arg_end) && (arg_string = argv[arg_index]) && | |
754 | (*arg_string == '-')) | |
755 | { | |
756 | longarg = 0; | |
757 | ||
758 | /* Make --login equivalent to -login. */ | |
759 | if (arg_string[1] == '-' && arg_string[2]) | |
726f6388 | 760 | { |
ccc6cda3 JA |
761 | longarg = 1; |
762 | arg_string++; | |
726f6388 JA |
763 | } |
764 | ||
ccc6cda3 | 765 | for (i = 0; long_args[i].name; i++) |
726f6388 | 766 | { |
ccc6cda3 | 767 | if (STREQ (arg_string + 1, long_args[i].name)) |
726f6388 | 768 | { |
ccc6cda3 JA |
769 | if (long_args[i].type == Int) |
770 | *long_args[i].int_value = 1; | |
771 | else if (argv[++arg_index] == 0) | |
772 | { | |
5e13499c | 773 | report_error (_("%s: option requires an argument"), long_args[i].name); |
d3a24ed2 | 774 | exit (EX_BADUSAGE); |
ccc6cda3 JA |
775 | } |
776 | else | |
777 | *long_args[i].char_value = argv[arg_index]; | |
778 | ||
779 | break; | |
726f6388 | 780 | } |
726f6388 | 781 | } |
ccc6cda3 | 782 | if (long_args[i].name == 0) |
726f6388 | 783 | { |
ccc6cda3 JA |
784 | if (longarg) |
785 | { | |
5e13499c | 786 | report_error (_("%s: invalid option"), argv[arg_index]); |
d166f048 | 787 | show_shell_usage (stderr, 0); |
d3a24ed2 | 788 | exit (EX_BADUSAGE); |
ccc6cda3 JA |
789 | } |
790 | break; /* No such argument. Maybe flag arg. */ | |
726f6388 | 791 | } |
726f6388 | 792 | |
ccc6cda3 JA |
793 | arg_index++; |
794 | } | |
795 | ||
796 | return (arg_index); | |
797 | } | |
798 | ||
799 | static int | |
800 | parse_shell_options (argv, arg_start, arg_end) | |
801 | char **argv; | |
802 | int arg_start, arg_end; | |
803 | { | |
804 | int arg_index; | |
805 | int arg_character, on_or_off, next_arg, i; | |
806 | char *o_option, *arg_string; | |
807 | ||
808 | arg_index = arg_start; | |
809 | while (arg_index != arg_end && (arg_string = argv[arg_index]) && | |
810 | (*arg_string == '-' || *arg_string == '+')) | |
811 | { | |
812 | /* There are flag arguments, so parse them. */ | |
813 | next_arg = arg_index + 1; | |
814 | ||
815 | /* A single `-' signals the end of options. From the 4.3 BSD sh. | |
816 | An option `--' means the same thing; this is the standard | |
817 | getopt(3) meaning. */ | |
818 | if (arg_string[0] == '-' && | |
819 | (arg_string[1] == '\0' || | |
820 | (arg_string[1] == '-' && arg_string[2] == '\0'))) | |
821 | return (next_arg); | |
726f6388 | 822 | |
ccc6cda3 JA |
823 | i = 1; |
824 | on_or_off = arg_string[0]; | |
825 | while (arg_character = arg_string[i++]) | |
726f6388 | 826 | { |
ccc6cda3 JA |
827 | switch (arg_character) |
828 | { | |
829 | case 'c': | |
830 | want_pending_command = 1; | |
831 | break; | |
832 | ||
7117c2d2 JA |
833 | case 'l': |
834 | make_login_shell = 1; | |
835 | break; | |
836 | ||
ccc6cda3 JA |
837 | case 's': |
838 | read_from_stdin = 1; | |
839 | break; | |
840 | ||
841 | case 'o': | |
842 | o_option = argv[next_arg]; | |
843 | if (o_option == 0) | |
844 | { | |
cce855bc | 845 | list_minus_o_opts (-1, (on_or_off == '-') ? 0 : 1); |
ccc6cda3 JA |
846 | break; |
847 | } | |
848 | if (set_minus_o_option (on_or_off, o_option) != EXECUTION_SUCCESS) | |
d3a24ed2 | 849 | exit (EX_BADUSAGE); |
ccc6cda3 JA |
850 | next_arg++; |
851 | break; | |
852 | ||
f73dda09 JA |
853 | case 'O': |
854 | /* Since some of these can be overridden by the normal | |
855 | interactive/non-interactive shell initialization or | |
856 | initializing posix mode, we save the options and process | |
857 | them after initialization. */ | |
858 | o_option = argv[next_arg]; | |
859 | if (o_option == 0) | |
860 | { | |
861 | shopt_listopt (o_option, (on_or_off == '-') ? 0 : 1); | |
862 | break; | |
863 | } | |
864 | add_shopt_to_alist (o_option, on_or_off); | |
865 | next_arg++; | |
866 | break; | |
867 | ||
ccc6cda3 JA |
868 | case 'D': |
869 | dump_translatable_strings = 1; | |
870 | break; | |
871 | ||
872 | default: | |
873 | if (change_flag (arg_character, on_or_off) == FLAG_ERROR) | |
874 | { | |
5e13499c | 875 | report_error (_("%c%c: invalid option"), on_or_off, arg_character); |
d166f048 | 876 | show_shell_usage (stderr, 0); |
d3a24ed2 | 877 | exit (EX_BADUSAGE); |
ccc6cda3 JA |
878 | } |
879 | } | |
726f6388 | 880 | } |
ccc6cda3 JA |
881 | /* Can't do just a simple increment anymore -- what about |
882 | "bash -abouo emacs ignoreeof -hP"? */ | |
883 | arg_index = next_arg; | |
884 | } | |
726f6388 | 885 | |
ccc6cda3 JA |
886 | return (arg_index); |
887 | } | |
726f6388 | 888 | |
ccc6cda3 | 889 | /* Exit the shell with status S. */ |
cce855bc | 890 | void |
ccc6cda3 JA |
891 | exit_shell (s) |
892 | int s; | |
893 | { | |
894 | /* Do trap[0] if defined. Allow it to override the exit status | |
895 | passed to us. */ | |
896 | if (signal_is_trapped (0)) | |
897 | s = run_exit_trap (); | |
898 | ||
899 | #if defined (PROCESS_SUBSTITUTION) | |
900 | unlink_fifo_list (); | |
901 | #endif /* PROCESS_SUBSTITUTION */ | |
726f6388 | 902 | |
726f6388 | 903 | #if defined (HISTORY) |
ccc6cda3 JA |
904 | if (interactive_shell) |
905 | maybe_save_shell_history (); | |
726f6388 | 906 | #endif /* HISTORY */ |
ccc6cda3 | 907 | |
09767ff0 | 908 | #if defined (COPROCESS_SUPPORT) |
8e1a6eaa | 909 | coproc_flush (); |
09767ff0 CR |
910 | #endif |
911 | ||
726f6388 | 912 | #if defined (JOB_CONTROL) |
cce855bc JA |
913 | /* If the user has run `shopt -s huponexit', hangup all jobs when we exit |
914 | an interactive login shell. ksh does this unconditionally. */ | |
915 | if (interactive_shell && login_shell && hup_on_exit) | |
916 | hangup_all_jobs (); | |
917 | ||
ccc6cda3 | 918 | /* If this shell is interactive, terminate all stopped jobs and |
28ef6c31 JA |
919 | restore the original terminal process group. Don't do this if we're |
920 | in a subshell and calling exit_shell after, for example, a failed | |
921 | word expansion. */ | |
922 | if (subshell_environment == 0) | |
923 | end_job_control (); | |
726f6388 JA |
924 | #endif /* JOB_CONTROL */ |
925 | ||
926 | /* Always return the exit status of the last command to our parent. */ | |
7117c2d2 | 927 | sh_exit (s); |
726f6388 JA |
928 | } |
929 | ||
bb70624e JA |
930 | /* A wrapper for exit that (optionally) can do other things, like malloc |
931 | statistics tracing. */ | |
932 | void | |
933 | sh_exit (s) | |
934 | int s; | |
935 | { | |
7117c2d2 JA |
936 | #if defined (MALLOC_DEBUG) && defined (USING_BASH_MALLOC) |
937 | if (malloc_trace_at_exit) | |
938 | trace_malloc_stats (get_name_for_error (), (char *)NULL); | |
939 | #endif | |
940 | ||
bb70624e JA |
941 | exit (s); |
942 | } | |
943 | ||
726f6388 JA |
944 | /* Source the bash startup files. If POSIXLY_CORRECT is non-zero, we obey |
945 | the Posix.2 startup file rules: $ENV is expanded, and if the file it | |
946 | names exists, that file is sourced. The Posix.2 rules are in effect | |
ccc6cda3 | 947 | for interactive shells only. (section 4.56.5.3) */ |
726f6388 | 948 | |
ccc6cda3 JA |
949 | /* Execute ~/.bashrc for most shells. Never execute it if |
950 | ACT_LIKE_SH is set, or if NO_RC is set. | |
726f6388 | 951 | |
ccc6cda3 | 952 | If the executable file "/usr/gnu/src/bash/foo" contains: |
726f6388 | 953 | |
ccc6cda3 JA |
954 | #!/usr/gnu/bin/bash |
955 | echo hello | |
726f6388 | 956 | |
ccc6cda3 | 957 | then: |
726f6388 | 958 | |
28ef6c31 JA |
959 | COMMAND EXECUTE BASHRC |
960 | -------------------------------- | |
961 | bash -c foo NO | |
962 | bash foo NO | |
963 | foo NO | |
964 | rsh machine ls YES (for rsh, which calls `bash -c') | |
965 | rsh machine foo YES (for shell started by rsh) NO (for foo!) | |
966 | echo ls | bash NO | |
967 | login NO | |
968 | bash YES | |
ccc6cda3 JA |
969 | */ |
970 | ||
971 | static void | |
972 | execute_env_file (env_file) | |
973 | char *env_file; | |
974 | { | |
975 | char *fn; | |
ccc6cda3 JA |
976 | |
977 | if (env_file && *env_file) | |
978 | { | |
f73dda09 JA |
979 | fn = expand_string_unsplit_to_string (env_file, Q_DOUBLE_QUOTES); |
980 | if (fn && *fn) | |
981 | maybe_execute_file (fn, 1); | |
982 | FREE (fn); | |
726f6388 | 983 | } |
ccc6cda3 | 984 | } |
726f6388 | 985 | |
ccc6cda3 JA |
986 | static void |
987 | run_startup_files () | |
988 | { | |
d166f048 JA |
989 | #if defined (JOB_CONTROL) |
990 | int old_job_control; | |
991 | #endif | |
cce855bc | 992 | int sourced_login, run_by_ssh; |
d166f048 | 993 | |
cce855bc | 994 | /* get the rshd/sshd case out of the way first. */ |
ccc6cda3 | 995 | if (interactive_shell == 0 && no_rc == 0 && login_shell == 0 && |
d3a24ed2 | 996 | act_like_sh == 0 && command_execution_string) |
726f6388 | 997 | { |
f73dda09 JA |
998 | #ifdef SSH_SOURCE_BASHRC |
999 | run_by_ssh = (find_variable ("SSH_CLIENT") != (SHELL_VAR *)0) || | |
1000 | (find_variable ("SSH2_CLIENT") != (SHELL_VAR *)0); | |
1001 | #else | |
1002 | run_by_ssh = 0; | |
1003 | #endif | |
cce855bc JA |
1004 | |
1005 | /* If we were run by sshd or we think we were run by rshd, execute | |
bb70624e JA |
1006 | ~/.bashrc if we are a top-level shell. */ |
1007 | if ((run_by_ssh || isnetconn (fileno (stdin))) && shell_level < 2) | |
cce855bc | 1008 | { |
ccc6cda3 | 1009 | #ifdef SYS_BASHRC |
b72432fd JA |
1010 | # if defined (__OPENNT) |
1011 | maybe_execute_file (_prefixInstallPath(SYS_BASHRC, NULL, 0), 1); | |
1012 | # else | |
cce855bc | 1013 | maybe_execute_file (SYS_BASHRC, 1); |
b72432fd | 1014 | # endif |
ccc6cda3 | 1015 | #endif |
cce855bc JA |
1016 | maybe_execute_file (bashrc_file, 1); |
1017 | return; | |
1018 | } | |
ccc6cda3 | 1019 | } |
726f6388 | 1020 | |
cce855bc JA |
1021 | #if defined (JOB_CONTROL) |
1022 | /* Startup files should be run without job control enabled. */ | |
1023 | old_job_control = interactive_shell ? set_job_control (0) : 0; | |
1024 | #endif | |
1025 | ||
1026 | sourced_login = 0; | |
1027 | ||
7117c2d2 JA |
1028 | /* A shell begun with the --login (or -l) flag that is not in posix mode |
1029 | runs the login shell startup files, no matter whether or not it is | |
bb70624e JA |
1030 | interactive. If NON_INTERACTIVE_LOGIN_SHELLS is defined, run the |
1031 | startup files if argv[0][0] == '-' as well. */ | |
1032 | #if defined (NON_INTERACTIVE_LOGIN_SHELLS) | |
1033 | if (login_shell && posixly_correct == 0) | |
1034 | #else | |
1035 | if (login_shell < 0 && posixly_correct == 0) | |
1036 | #endif | |
cce855bc JA |
1037 | { |
1038 | /* We don't execute .bashrc for login shells. */ | |
1039 | no_rc++; | |
1040 | ||
1041 | /* Execute /etc/profile and one of the personal login shell | |
1042 | initialization files. */ | |
1043 | if (no_profile == 0) | |
1044 | { | |
1045 | maybe_execute_file (SYS_PROFILE, 1); | |
1046 | ||
1047 | if (act_like_sh) /* sh */ | |
1048 | maybe_execute_file ("~/.profile", 1); | |
1049 | else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) && | |
1050 | (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */ | |
1051 | maybe_execute_file ("~/.profile", 1); | |
1052 | } | |
1053 | ||
1054 | sourced_login = 1; | |
1055 | } | |
cce855bc | 1056 | |
ccc6cda3 JA |
1057 | /* A non-interactive shell not named `sh' and not in posix mode reads and |
1058 | executes commands from $BASH_ENV. If `su' starts a shell with `-c cmd' | |
1059 | and `-su' as the name of the shell, we want to read the startup files. | |
1060 | No other non-interactive shells read any startup files. */ | |
1061 | if (interactive_shell == 0 && !(su_shell && login_shell)) | |
1062 | { | |
1063 | if (posixly_correct == 0 && act_like_sh == 0 && privileged_mode == 0 && | |
1064 | sourced_env++ == 0) | |
1065 | execute_env_file (get_string_value ("BASH_ENV")); | |
1066 | return; | |
1067 | } | |
726f6388 | 1068 | |
ccc6cda3 JA |
1069 | /* Interactive shell or `-su' shell. */ |
1070 | if (posixly_correct == 0) /* bash, sh */ | |
1071 | { | |
cce855bc JA |
1072 | if (login_shell && sourced_login++ == 0) |
1073 | { | |
1074 | /* We don't execute .bashrc for login shells. */ | |
1075 | no_rc++; | |
726f6388 | 1076 | |
cce855bc JA |
1077 | /* Execute /etc/profile and one of the personal login shell |
1078 | initialization files. */ | |
1079 | if (no_profile == 0) | |
1080 | { | |
1081 | maybe_execute_file (SYS_PROFILE, 1); | |
726f6388 | 1082 | |
cce855bc JA |
1083 | if (act_like_sh) /* sh */ |
1084 | maybe_execute_file ("~/.profile", 1); | |
1085 | else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) && | |
1086 | (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */ | |
1087 | maybe_execute_file ("~/.profile", 1); | |
1088 | } | |
1089 | } | |
726f6388 | 1090 | |
ccc6cda3 JA |
1091 | /* bash */ |
1092 | if (act_like_sh == 0 && no_rc == 0) | |
1093 | { | |
1094 | #ifdef SYS_BASHRC | |
b72432fd JA |
1095 | # if defined (__OPENNT) |
1096 | maybe_execute_file (_prefixInstallPath(SYS_BASHRC, NULL, 0), 1); | |
1097 | # else | |
ccc6cda3 | 1098 | maybe_execute_file (SYS_BASHRC, 1); |
bb70624e | 1099 | # endif |
ccc6cda3 | 1100 | #endif |
28ef6c31 | 1101 | maybe_execute_file (bashrc_file, 1); |
726f6388 | 1102 | } |
ccc6cda3 JA |
1103 | /* sh */ |
1104 | else if (act_like_sh && privileged_mode == 0 && sourced_env++ == 0) | |
28ef6c31 | 1105 | execute_env_file (get_string_value ("ENV")); |
ccc6cda3 JA |
1106 | } |
1107 | else /* bash --posix, sh --posix */ | |
1108 | { | |
1109 | /* bash and sh */ | |
1110 | if (interactive_shell && privileged_mode == 0 && sourced_env++ == 0) | |
28ef6c31 | 1111 | execute_env_file (get_string_value ("ENV")); |
726f6388 | 1112 | } |
d166f048 JA |
1113 | |
1114 | #if defined (JOB_CONTROL) | |
1115 | set_job_control (old_job_control); | |
1116 | #endif | |
726f6388 JA |
1117 | } |
1118 | ||
1119 | #if defined (RESTRICTED_SHELL) | |
b72432fd JA |
1120 | /* Return 1 if the shell should be a restricted one based on NAME or the |
1121 | value of `restricted'. Don't actually do anything, just return a | |
1122 | boolean value. */ | |
1123 | int | |
1124 | shell_is_restricted (name) | |
1125 | char *name; | |
1126 | { | |
1127 | char *temp; | |
1128 | ||
1129 | if (restricted) | |
1130 | return 1; | |
1131 | temp = base_pathname (name); | |
d90269dd CR |
1132 | if (*temp == '-') |
1133 | temp++; | |
b72432fd JA |
1134 | return (STREQ (temp, RESTRICTED_SHELL_NAME)); |
1135 | } | |
1136 | ||
ccc6cda3 JA |
1137 | /* Perhaps make this shell a `restricted' one, based on NAME. If the |
1138 | basename of NAME is "rbash", then this shell is restricted. The | |
1139 | name of the restricted shell is a configurable option, see config.h. | |
b72432fd JA |
1140 | In a restricted shell, PATH, SHELL, ENV, and BASH_ENV are read-only |
1141 | and non-unsettable. | |
726f6388 JA |
1142 | Do this also if `restricted' is already set to 1; maybe the shell was |
1143 | started with -r. */ | |
ccc6cda3 | 1144 | int |
726f6388 JA |
1145 | maybe_make_restricted (name) |
1146 | char *name; | |
1147 | { | |
1148 | char *temp; | |
1149 | ||
7117c2d2 | 1150 | temp = base_pathname (name); |
d3a24ed2 CR |
1151 | if (*temp == '-') |
1152 | temp++; | |
ccc6cda3 | 1153 | if (restricted || (STREQ (temp, RESTRICTED_SHELL_NAME))) |
726f6388 JA |
1154 | { |
1155 | set_var_read_only ("PATH"); | |
726f6388 | 1156 | set_var_read_only ("SHELL"); |
b72432fd JA |
1157 | set_var_read_only ("ENV"); |
1158 | set_var_read_only ("BASH_ENV"); | |
28ef6c31 | 1159 | restricted = 1; |
726f6388 | 1160 | } |
ccc6cda3 | 1161 | return (restricted); |
726f6388 JA |
1162 | } |
1163 | #endif /* RESTRICTED_SHELL */ | |
1164 | ||
ccc6cda3 JA |
1165 | /* Fetch the current set of uids and gids and return 1 if we're running |
1166 | setuid or setgid. */ | |
1167 | static int | |
1168 | uidget () | |
726f6388 | 1169 | { |
ccc6cda3 | 1170 | uid_t u; |
726f6388 | 1171 | |
ccc6cda3 JA |
1172 | u = getuid (); |
1173 | if (current_user.uid != u) | |
726f6388 | 1174 | { |
ccc6cda3 JA |
1175 | FREE (current_user.user_name); |
1176 | FREE (current_user.shell); | |
1177 | FREE (current_user.home_dir); | |
1178 | current_user.user_name = current_user.shell = current_user.home_dir = (char *)NULL; | |
726f6388 | 1179 | } |
ccc6cda3 JA |
1180 | current_user.uid = u; |
1181 | current_user.gid = getgid (); | |
1182 | current_user.euid = geteuid (); | |
1183 | current_user.egid = getegid (); | |
726f6388 | 1184 | |
ccc6cda3 JA |
1185 | /* See whether or not we are running setuid or setgid. */ |
1186 | return (current_user.uid != current_user.euid) || | |
1187 | (current_user.gid != current_user.egid); | |
1188 | } | |
726f6388 | 1189 | |
ccc6cda3 JA |
1190 | void |
1191 | disable_priv_mode () | |
1192 | { | |
1193 | setuid (current_user.uid); | |
1194 | setgid (current_user.gid); | |
1195 | current_user.euid = current_user.uid; | |
1196 | current_user.egid = current_user.gid; | |
726f6388 JA |
1197 | } |
1198 | ||
cce855bc JA |
1199 | static int |
1200 | run_wordexp (words) | |
1201 | char *words; | |
1202 | { | |
1203 | int code, nw, nb; | |
5e13499c | 1204 | WORD_LIST *wl, *tl, *result; |
cce855bc JA |
1205 | |
1206 | code = setjmp (top_level); | |
1207 | ||
1208 | if (code != NOT_JUMPED) | |
1209 | { | |
1210 | switch (code) | |
1211 | { | |
1212 | /* Some kind of throw to top_level has occured. */ | |
1213 | case FORCE_EOF: | |
1214 | return last_command_exit_value = 127; | |
d3a24ed2 | 1215 | case ERREXIT: |
cce855bc JA |
1216 | case EXITPROG: |
1217 | return last_command_exit_value; | |
1218 | case DISCARD: | |
1219 | return last_command_exit_value = 1; | |
1220 | default: | |
b72432fd | 1221 | command_error ("run_wordexp", CMDERR_BADJUMP, code, 0); |
cce855bc JA |
1222 | } |
1223 | } | |
1224 | ||
1225 | /* Run it through the parser to get a list of words and expand them */ | |
1226 | if (words && *words) | |
1227 | { | |
1228 | with_input_from_string (words, "--wordexp"); | |
1229 | if (parse_command () != 0) | |
28ef6c31 | 1230 | return (126); |
cce855bc JA |
1231 | if (global_command == 0) |
1232 | { | |
1233 | printf ("0\n0\n"); | |
1234 | return (0); | |
1235 | } | |
1236 | if (global_command->type != cm_simple) | |
28ef6c31 | 1237 | return (126); |
cce855bc | 1238 | wl = global_command->value.Simple->words; |
5e13499c CR |
1239 | if (protected_mode) |
1240 | for (tl = wl; tl; tl = tl->next) | |
dc8fbaf9 | 1241 | tl->word->flags |= W_NOCOMSUB|W_NOPROCSUB; |
cce855bc JA |
1242 | result = wl ? expand_words_no_vars (wl) : (WORD_LIST *)0; |
1243 | } | |
1244 | else | |
1245 | result = (WORD_LIST *)0; | |
1246 | ||
1247 | last_command_exit_value = 0; | |
1248 | ||
1249 | if (result == 0) | |
1250 | { | |
1251 | printf ("0\n0\n"); | |
1252 | return (0); | |
1253 | } | |
1254 | ||
1255 | /* Count up the number of words and bytes, and print them. Don't count | |
1256 | the trailing NUL byte. */ | |
1257 | for (nw = nb = 0, wl = result; wl; wl = wl->next) | |
1258 | { | |
1259 | nw++; | |
1260 | nb += strlen (wl->word->word); | |
1261 | } | |
1262 | printf ("%u\n%u\n", nw, nb); | |
1263 | /* Print each word on a separate line. This will have to be changed when | |
1264 | the interface to glibc is completed. */ | |
1265 | for (wl = result; wl; wl = wl->next) | |
1266 | printf ("%s\n", wl->word->word); | |
1267 | ||
1268 | return (0); | |
1269 | } | |
1270 | ||
726f6388 JA |
1271 | #if defined (ONESHOT) |
1272 | /* Run one command, given as the argument to the -c option. Tell | |
1273 | parse_and_execute not to fork for a simple command. */ | |
ccc6cda3 | 1274 | static int |
726f6388 JA |
1275 | run_one_command (command) |
1276 | char *command; | |
1277 | { | |
1278 | int code; | |
1279 | ||
1280 | code = setjmp (top_level); | |
1281 | ||
1282 | if (code != NOT_JUMPED) | |
1283 | { | |
1284 | #if defined (PROCESS_SUBSTITUTION) | |
1285 | unlink_fifo_list (); | |
1286 | #endif /* PROCESS_SUBSTITUTION */ | |
1287 | switch (code) | |
1288 | { | |
1289 | /* Some kind of throw to top_level has occured. */ | |
1290 | case FORCE_EOF: | |
1291 | return last_command_exit_value = 127; | |
d3a24ed2 | 1292 | case ERREXIT: |
726f6388 JA |
1293 | case EXITPROG: |
1294 | return last_command_exit_value; | |
1295 | case DISCARD: | |
1296 | return last_command_exit_value = 1; | |
1297 | default: | |
b72432fd | 1298 | command_error ("run_one_command", CMDERR_BADJUMP, code, 0); |
726f6388 JA |
1299 | } |
1300 | } | |
d166f048 | 1301 | return (parse_and_execute (savestring (command), "-c", SEVAL_NOHIST)); |
726f6388 JA |
1302 | } |
1303 | #endif /* ONESHOT */ | |
1304 | ||
ccc6cda3 JA |
1305 | static int |
1306 | bind_args (argv, arg_start, arg_end, start_index) | |
1307 | char **argv; | |
1308 | int arg_start, arg_end, start_index; | |
726f6388 | 1309 | { |
ccc6cda3 JA |
1310 | register int i; |
1311 | WORD_LIST *args; | |
726f6388 | 1312 | |
fd3925f1 | 1313 | for (i = arg_start, args = (WORD_LIST *)NULL; i < arg_end; i++) |
ccc6cda3 JA |
1314 | args = make_word_list (make_word (argv[i]), args); |
1315 | if (args) | |
726f6388 | 1316 | { |
ccc6cda3 JA |
1317 | args = REVERSE_LIST (args, WORD_LIST *); |
1318 | if (start_index == 0) /* bind to $0...$n for sh -c command */ | |
726f6388 | 1319 | { |
ccc6cda3 JA |
1320 | /* Posix.2 4.56.3 says that the first argument after sh -c command |
1321 | becomes $0, and the rest of the arguments become $1...$n */ | |
1322 | shell_name = savestring (args->word->word); | |
d166f048 | 1323 | FREE (dollar_vars[0]); |
ccc6cda3 JA |
1324 | dollar_vars[0] = savestring (args->word->word); |
1325 | remember_args (args->next, 1); | |
d3a24ed2 | 1326 | push_args (args->next); /* BASH_ARGV and BASH_ARGC */ |
726f6388 | 1327 | } |
ccc6cda3 | 1328 | else /* bind to $1...$n for shell script */ |
d3a24ed2 CR |
1329 | { |
1330 | remember_args (args, 1); | |
1331 | push_args (args); /* BASH_ARGV and BASH_ARGC */ | |
1332 | } | |
726f6388 | 1333 | |
ccc6cda3 JA |
1334 | dispose_words (args); |
1335 | } | |
726f6388 | 1336 | |
ccc6cda3 JA |
1337 | return (i); |
1338 | } | |
726f6388 | 1339 | |
ccc6cda3 JA |
1340 | void |
1341 | unbind_args () | |
1342 | { | |
1343 | remember_args ((WORD_LIST *)NULL, 1); | |
d3a24ed2 CR |
1344 | pop_args (); /* Reset BASH_ARGV and BASH_ARGC */ |
1345 | } | |
1346 | ||
1347 | static void | |
1348 | start_debugger () | |
1349 | { | |
1350 | #if defined (DEBUGGER) && defined (DEBUGGER_START_FILE) | |
1351 | int old_errexit; | |
1352 | ||
1353 | old_errexit = exit_immediately_on_error; | |
1354 | exit_immediately_on_error = 0; | |
1355 | ||
1356 | maybe_execute_file (DEBUGGER_START_FILE, 1); | |
1357 | function_trace_mode = 1; | |
1358 | ||
1359 | exit_immediately_on_error += old_errexit; | |
1360 | #endif | |
ccc6cda3 | 1361 | } |
726f6388 | 1362 | |
ccc6cda3 JA |
1363 | static int |
1364 | open_shell_script (script_name) | |
1365 | char *script_name; | |
1366 | { | |
28ef6c31 | 1367 | int fd, e, fd_is_tty; |
d3a24ed2 | 1368 | char *filename, *path_filename, *t; |
f73dda09 | 1369 | char sample[80]; |
ccc6cda3 | 1370 | int sample_len; |
d166f048 | 1371 | struct stat sb; |
d3a24ed2 CR |
1372 | #if defined (ARRAY_VARS) |
1373 | SHELL_VAR *funcname_v, *bash_source_v, *bash_lineno_v; | |
1374 | ARRAY *funcname_a, *bash_source_a, *bash_lineno_a; | |
1375 | #endif | |
726f6388 | 1376 | |
ccc6cda3 | 1377 | filename = savestring (script_name); |
726f6388 | 1378 | |
ccc6cda3 JA |
1379 | fd = open (filename, O_RDONLY); |
1380 | if ((fd < 0) && (errno == ENOENT) && (absolute_program (filename) == 0)) | |
1381 | { | |
d166f048 | 1382 | e = errno; |
ccc6cda3 JA |
1383 | /* If it's not in the current directory, try looking through PATH |
1384 | for it. */ | |
1385 | path_filename = find_path_file (script_name); | |
1386 | if (path_filename) | |
726f6388 | 1387 | { |
ccc6cda3 JA |
1388 | free (filename); |
1389 | filename = path_filename; | |
1390 | fd = open (filename, O_RDONLY); | |
726f6388 | 1391 | } |
d166f048 JA |
1392 | else |
1393 | errno = e; | |
726f6388 | 1394 | } |
726f6388 | 1395 | |
ccc6cda3 JA |
1396 | if (fd < 0) |
1397 | { | |
d166f048 | 1398 | e = errno; |
ccc6cda3 JA |
1399 | file_error (filename); |
1400 | exit ((e == ENOENT) ? EX_NOTFOUND : EX_NOINPUT); | |
1401 | } | |
726f6388 | 1402 | |
12d937f9 CR |
1403 | free (dollar_vars[0]); |
1404 | dollar_vars[0] = savestring (script_name); | |
1405 | ||
1406 | #if defined (ARRAY_VARS) | |
1407 | GET_ARRAY_FROM_VAR ("FUNCNAME", funcname_v, funcname_a); | |
1408 | GET_ARRAY_FROM_VAR ("BASH_SOURCE", bash_source_v, bash_source_a); | |
1409 | GET_ARRAY_FROM_VAR ("BASH_LINENO", bash_lineno_v, bash_lineno_a); | |
1410 | ||
1411 | array_push (bash_source_a, filename); | |
1412 | if (bash_lineno_a) | |
1413 | { | |
1414 | t = itos (executing_line_number ()); | |
1415 | array_push (bash_lineno_a, t); | |
1416 | free (t); | |
1417 | } | |
1418 | array_push (funcname_a, "main"); | |
1419 | #endif | |
1420 | ||
28ef6c31 JA |
1421 | #ifdef HAVE_DEV_FD |
1422 | fd_is_tty = isatty (fd); | |
1423 | #else | |
1424 | fd_is_tty = 0; | |
1425 | #endif | |
1426 | ||
1427 | /* Only do this with non-tty file descriptors we can seek on. */ | |
1428 | if (fd_is_tty == 0 && (lseek (fd, 0L, 1) != -1)) | |
ccc6cda3 JA |
1429 | { |
1430 | /* Check to see if the `file' in `bash file' is a binary file | |
1431 | according to the same tests done by execute_simple_command (), | |
1432 | and report an error and exit if it is. */ | |
1433 | sample_len = read (fd, sample, sizeof (sample)); | |
d166f048 JA |
1434 | if (sample_len < 0) |
1435 | { | |
1436 | e = errno; | |
1437 | if ((fstat (fd, &sb) == 0) && S_ISDIR (sb.st_mode)) | |
5e13499c | 1438 | internal_error (_("%s: is a directory"), filename); |
28ef6c31 | 1439 | else |
d166f048 JA |
1440 | { |
1441 | errno = e; | |
1442 | file_error (filename); | |
1443 | } | |
1444 | exit (EX_NOEXEC); | |
1445 | } | |
1446 | else if (sample_len > 0 && (check_binary_file (sample, sample_len))) | |
ccc6cda3 | 1447 | { |
d3ad40de | 1448 | internal_error (_("%s: cannot execute binary file"), filename); |
ccc6cda3 JA |
1449 | exit (EX_BINARY_FILE); |
1450 | } | |
1451 | /* Now rewind the file back to the beginning. */ | |
1452 | lseek (fd, 0L, 0); | |
1453 | } | |
726f6388 | 1454 | |
bb70624e JA |
1455 | /* Open the script. But try to move the file descriptor to a randomly |
1456 | large one, in the hopes that any descriptors used by the script will | |
1457 | not match with ours. */ | |
d3ad40de | 1458 | fd = move_to_high_fd (fd, 1, -1); |
bb70624e | 1459 | |
28ef6c31 JA |
1460 | #if defined (__CYGWIN__) && defined (O_TEXT) |
1461 | setmode (fd, O_TEXT); | |
1462 | #endif | |
1463 | ||
ccc6cda3 JA |
1464 | #if defined (BUFFERED_INPUT) |
1465 | default_buffered_input = fd; | |
ccc6cda3 JA |
1466 | SET_CLOSE_ON_EXEC (default_buffered_input); |
1467 | #else /* !BUFFERED_INPUT */ | |
ccc6cda3 | 1468 | default_input = fdopen (fd, "r"); |
726f6388 | 1469 | |
ccc6cda3 JA |
1470 | if (default_input == 0) |
1471 | { | |
1472 | file_error (filename); | |
1473 | exit (EX_NOTFOUND); | |
1474 | } | |
726f6388 | 1475 | |
ccc6cda3 JA |
1476 | SET_CLOSE_ON_EXEC (fd); |
1477 | if (fileno (default_input) != fd) | |
1478 | SET_CLOSE_ON_EXEC (fileno (default_input)); | |
1479 | #endif /* !BUFFERED_INPUT */ | |
726f6388 | 1480 | |
28ef6c31 JA |
1481 | /* Just about the only way for this code to be executed is if something |
1482 | like `bash -i /dev/stdin' is executed. */ | |
1483 | if (interactive_shell && fd_is_tty) | |
ccc6cda3 | 1484 | { |
ccc6cda3 JA |
1485 | dup2 (fd, 0); |
1486 | close (fd); | |
1487 | fd = 0; | |
1488 | #if defined (BUFFERED_INPUT) | |
1489 | default_buffered_input = 0; | |
1490 | #else | |
1491 | fclose (default_input); | |
1492 | default_input = stdin; | |
1493 | #endif | |
1494 | } | |
f73dda09 JA |
1495 | else if (forced_interactive && fd_is_tty == 0) |
1496 | /* But if a script is called with something like `bash -i scriptname', | |
1497 | we need to do a non-interactive setup here, since we didn't do it | |
1498 | before. */ | |
b0c16657 | 1499 | init_interactive_script (); |
28ef6c31 | 1500 | |
ccc6cda3 JA |
1501 | free (filename); |
1502 | return (fd); | |
726f6388 JA |
1503 | } |
1504 | ||
ccc6cda3 JA |
1505 | /* Initialize the input routines for the parser. */ |
1506 | static void | |
1507 | set_bash_input () | |
726f6388 | 1508 | { |
ccc6cda3 JA |
1509 | /* Make sure the fd from which we are reading input is not in |
1510 | no-delay mode. */ | |
1511 | #if defined (BUFFERED_INPUT) | |
1512 | if (interactive == 0) | |
28ef6c31 | 1513 | sh_unset_nodelay_mode (default_buffered_input); |
ccc6cda3 JA |
1514 | else |
1515 | #endif /* !BUFFERED_INPUT */ | |
28ef6c31 | 1516 | sh_unset_nodelay_mode (fileno (stdin)); |
726f6388 | 1517 | |
ccc6cda3 JA |
1518 | /* with_input_from_stdin really means `with_input_from_readline' */ |
1519 | if (interactive && no_line_editing == 0) | |
1520 | with_input_from_stdin (); | |
ccc6cda3 | 1521 | #if defined (BUFFERED_INPUT) |
01ed5ba4 CR |
1522 | else if (interactive == 0) |
1523 | with_input_from_buffered_stream (default_buffered_input, dollar_vars[0]); | |
1524 | #endif /* BUFFERED_INPUT */ | |
1525 | else | |
ccc6cda3 | 1526 | with_input_from_stream (default_input, dollar_vars[0]); |
726f6388 JA |
1527 | } |
1528 | ||
cce855bc JA |
1529 | /* Close the current shell script input source and forget about it. This is |
1530 | extern so execute_cmd.c:initialize_subshell() can call it. If CHECK_ZERO | |
1531 | is non-zero, we close default_buffered_input even if it's the standard | |
1532 | input (fd 0). */ | |
1533 | void | |
1534 | unset_bash_input (check_zero) | |
1535 | int check_zero; | |
1536 | { | |
1537 | #if defined (BUFFERED_INPUT) | |
1538 | if ((check_zero && default_buffered_input >= 0) || | |
1539 | (check_zero == 0 && default_buffered_input > 0)) | |
1540 | { | |
1541 | close_buffered_fd (default_buffered_input); | |
1542 | default_buffered_input = bash_input.location.buffered_fd = -1; | |
1543 | } | |
1544 | #else /* !BUFFERED_INPUT */ | |
1545 | if (default_input) | |
1546 | { | |
1547 | fclose (default_input); | |
1548 | default_input = (FILE *)NULL; | |
1549 | } | |
1550 | #endif /* !BUFFERED_INPUT */ | |
1551 | } | |
1552 | ||
1553 | ||
ccc6cda3 JA |
1554 | #if !defined (PROGRAM) |
1555 | # define PROGRAM "bash" | |
1556 | #endif | |
1557 | ||
1558 | static void | |
1559 | set_shell_name (argv0) | |
1560 | char *argv0; | |
726f6388 | 1561 | { |
ccc6cda3 JA |
1562 | /* Here's a hack. If the name of this shell is "sh", then don't do |
1563 | any startup files; just try to be more like /bin/sh. */ | |
fd3925f1 | 1564 | shell_name = argv0 ? base_pathname (argv0) : PROGRAM; |
7117c2d2 | 1565 | |
11a6f9a9 | 1566 | if (argv0 && *argv0 == '-') |
7117c2d2 | 1567 | { |
11a6f9a9 CR |
1568 | if (*shell_name == '-') |
1569 | shell_name++; | |
7117c2d2 JA |
1570 | login_shell++; |
1571 | } | |
1572 | ||
ccc6cda3 JA |
1573 | if (shell_name[0] == 's' && shell_name[1] == 'h' && shell_name[2] == '\0') |
1574 | act_like_sh++; | |
1575 | if (shell_name[0] == 's' && shell_name[1] == 'u' && shell_name[2] == '\0') | |
1576 | su_shell++; | |
726f6388 | 1577 | |
fd3925f1 | 1578 | shell_name = argv0 ? argv0 : PROGRAM; |
ccc6cda3 JA |
1579 | FREE (dollar_vars[0]); |
1580 | dollar_vars[0] = savestring (shell_name); | |
726f6388 | 1581 | |
ccc6cda3 JA |
1582 | /* A program may start an interactive shell with |
1583 | "execl ("/bin/bash", "-", NULL)". | |
1584 | If so, default the name of this shell to our name. */ | |
1585 | if (!shell_name || !*shell_name || (shell_name[0] == '-' && !shell_name[1])) | |
1586 | shell_name = PROGRAM; | |
1587 | } | |
726f6388 | 1588 | |
ccc6cda3 JA |
1589 | static void |
1590 | init_interactive () | |
1591 | { | |
b0c16657 CR |
1592 | expand_aliases = interactive_shell = startup_state = 1; |
1593 | interactive = 1; | |
726f6388 JA |
1594 | } |
1595 | ||
726f6388 | 1596 | static void |
ccc6cda3 | 1597 | init_noninteractive () |
726f6388 | 1598 | { |
ccc6cda3 JA |
1599 | #if defined (HISTORY) |
1600 | bash_history_reinit (0); | |
1601 | #endif /* HISTORY */ | |
1602 | interactive_shell = startup_state = interactive = 0; | |
7117c2d2 | 1603 | expand_aliases = posixly_correct; /* XXX - was 0 not posixly_correct */ |
ccc6cda3 JA |
1604 | no_line_editing = 1; |
1605 | #if defined (JOB_CONTROL) | |
1606 | set_job_control (0); | |
1607 | #endif /* JOB_CONTROL */ | |
726f6388 JA |
1608 | } |
1609 | ||
b0c16657 CR |
1610 | static void |
1611 | init_interactive_script () | |
1612 | { | |
1613 | init_noninteractive (); | |
1614 | expand_aliases = interactive_shell = startup_state = 1; | |
1615 | } | |
1616 | ||
d166f048 JA |
1617 | void |
1618 | get_current_user_info () | |
1619 | { | |
1620 | struct passwd *entry; | |
1621 | ||
1622 | /* Don't fetch this more than once. */ | |
1623 | if (current_user.user_name == 0) | |
1624 | { | |
1625 | entry = getpwuid (current_user.uid); | |
1626 | if (entry) | |
1627 | { | |
1628 | current_user.user_name = savestring (entry->pw_name); | |
1629 | current_user.shell = (entry->pw_shell && entry->pw_shell[0]) | |
1630 | ? savestring (entry->pw_shell) | |
1631 | : savestring ("/bin/sh"); | |
1632 | current_user.home_dir = savestring (entry->pw_dir); | |
1633 | } | |
1634 | else | |
1635 | { | |
5e13499c CR |
1636 | current_user.user_name = _("I have no name!"); |
1637 | current_user.user_name = savestring (current_user.user_name); | |
d166f048 JA |
1638 | current_user.shell = savestring ("/bin/sh"); |
1639 | current_user.home_dir = savestring ("/"); | |
1640 | } | |
1641 | endpwent (); | |
1642 | } | |
1643 | } | |
1644 | ||
726f6388 JA |
1645 | /* Do whatever is necessary to initialize the shell. |
1646 | Put new initializations in here. */ | |
1647 | static void | |
1648 | shell_initialize () | |
1649 | { | |
ccc6cda3 JA |
1650 | char hostname[256]; |
1651 | ||
726f6388 | 1652 | /* Line buffer output for stderr and stdout. */ |
cce855bc | 1653 | if (shell_initialized == 0) |
cce855bc | 1654 | { |
bb70624e JA |
1655 | sh_setlinebuf (stderr); |
1656 | sh_setlinebuf (stdout); | |
cce855bc | 1657 | } |
726f6388 JA |
1658 | |
1659 | /* Sort the array of shell builtins so that the binary search in | |
1660 | find_shell_builtin () works correctly. */ | |
1661 | initialize_shell_builtins (); | |
1662 | ||
1663 | /* Initialize the trap signal handlers before installing our own | |
1664 | signal handlers. traps.c:restore_original_signals () is responsible | |
1665 | for restoring the original default signal handlers. That function | |
1666 | is called when we make a new child. */ | |
1667 | initialize_traps (); | |
7117c2d2 | 1668 | initialize_signals (0); |
726f6388 | 1669 | |
ccc6cda3 JA |
1670 | /* It's highly unlikely that this will change. */ |
1671 | if (current_host_name == 0) | |
1672 | { | |
d166f048 | 1673 | /* Initialize current_host_name. */ |
ccc6cda3 JA |
1674 | if (gethostname (hostname, 255) < 0) |
1675 | current_host_name = "??host??"; | |
1676 | else | |
1677 | current_host_name = savestring (hostname); | |
1678 | } | |
1679 | ||
d166f048 JA |
1680 | /* Initialize the stuff in current_user that comes from the password |
1681 | file. We don't need to do this right away if the shell is not | |
1682 | interactive. */ | |
1683 | if (interactive_shell) | |
1684 | get_current_user_info (); | |
726f6388 JA |
1685 | |
1686 | /* Initialize our interface to the tilde expander. */ | |
1687 | tilde_initialize (); | |
1688 | ||
ccc6cda3 JA |
1689 | /* Initialize internal and environment variables. Don't import shell |
1690 | functions from the environment if we are running in privileged or | |
1691 | restricted mode or if the shell is running setuid. */ | |
1692 | #if defined (RESTRICTED_SHELL) | |
1693 | initialize_shell_variables (shell_environment, privileged_mode||restricted||running_setuid); | |
1694 | #else | |
1695 | initialize_shell_variables (shell_environment, privileged_mode||running_setuid); | |
1696 | #endif | |
726f6388 | 1697 | |
726f6388 | 1698 | /* Initialize the data structures for storing and running jobs. */ |
d166f048 | 1699 | initialize_job_control (0); |
726f6388 JA |
1700 | |
1701 | /* Initialize input streams to null. */ | |
1702 | initialize_bash_input (); | |
ccc6cda3 | 1703 | |
7117c2d2 JA |
1704 | initialize_flags (); |
1705 | ||
cce855bc JA |
1706 | /* Initialize the shell options. Don't import the shell options |
1707 | from the environment variable $SHELLOPTS if we are running in | |
1708 | privileged or restricted mode or if the shell is running setuid. */ | |
1709 | #if defined (RESTRICTED_SHELL) | |
1710 | initialize_shell_options (privileged_mode||restricted||running_setuid); | |
1711 | #else | |
1712 | initialize_shell_options (privileged_mode||running_setuid); | |
1713 | #endif | |
726f6388 JA |
1714 | } |
1715 | ||
1716 | /* Function called by main () when it appears that the shell has already | |
1717 | had some initialization performed. This is supposed to reset the world | |
1718 | back to a pristine state, as if we had been exec'ed. */ | |
1719 | static void | |
1720 | shell_reinitialize () | |
1721 | { | |
1722 | /* The default shell prompts. */ | |
1723 | primary_prompt = PPROMPT; | |
1724 | secondary_prompt = SPROMPT; | |
1725 | ||
1726 | /* Things that get 1. */ | |
1727 | current_command_number = 1; | |
1728 | ||
1729 | /* We have decided that the ~/.bashrc file should not be executed | |
1730 | for the invocation of each shell script. If the variable $ENV | |
1731 | (or $BASH_ENV) is set, its value is used as the name of a file | |
1732 | to source. */ | |
1733 | no_rc = no_profile = 1; | |
1734 | ||
1735 | /* Things that get 0. */ | |
1736 | login_shell = make_login_shell = interactive = executing = 0; | |
1737 | debugging = do_version = line_number = last_command_exit_value = 0; | |
1738 | forced_interactive = interactive_shell = subshell_environment = 0; | |
ccc6cda3 | 1739 | expand_aliases = 0; |
726f6388 JA |
1740 | |
1741 | #if defined (HISTORY) | |
ccc6cda3 | 1742 | bash_history_reinit (0); |
726f6388 JA |
1743 | #endif /* HISTORY */ |
1744 | ||
1745 | #if defined (RESTRICTED_SHELL) | |
1746 | restricted = 0; | |
1747 | #endif /* RESTRICTED_SHELL */ | |
1748 | ||
1749 | /* Ensure that the default startup file is used. (Except that we don't | |
1750 | execute this file for reinitialized shells). */ | |
1751 | bashrc_file = "~/.bashrc"; | |
1752 | ||
1753 | /* Delete all variables and functions. They will be reinitialized when | |
1754 | the environment is parsed. */ | |
7117c2d2 | 1755 | delete_all_contexts (shell_variables); |
726f6388 JA |
1756 | delete_all_variables (shell_functions); |
1757 | ||
33fe8777 CR |
1758 | reinit_special_variables (); |
1759 | ||
1760 | #if defined (READLINE) | |
8943768b | 1761 | bashline_reinitialize (); |
33fe8777 CR |
1762 | #endif |
1763 | ||
28ef6c31 | 1764 | shell_reinitialized = 1; |
726f6388 JA |
1765 | } |
1766 | ||
726f6388 | 1767 | static void |
d166f048 | 1768 | show_shell_usage (fp, extra) |
ccc6cda3 | 1769 | FILE *fp; |
d166f048 | 1770 | int extra; |
726f6388 | 1771 | { |
ccc6cda3 JA |
1772 | int i; |
1773 | char *set_opts, *s, *t; | |
1774 | ||
d166f048 | 1775 | if (extra) |
d3ad40de | 1776 | fprintf (fp, _("GNU bash, version %s-(%s)\n"), shell_version_string (), MACHTYPE); |
5e13499c | 1777 | fprintf (fp, _("Usage:\t%s [GNU long option] [option] ...\n\t%s [GNU long option] [option] script-file ...\n"), |
ccc6cda3 | 1778 | shell_name, shell_name); |
5e13499c | 1779 | fputs (_("GNU long options:\n"), fp); |
ccc6cda3 JA |
1780 | for (i = 0; long_args[i].name; i++) |
1781 | fprintf (fp, "\t--%s\n", long_args[i].name); | |
1782 | ||
5e13499c CR |
1783 | fputs (_("Shell options:\n"), fp); |
1784 | fputs (_("\t-irsD or -c command or -O shopt_option\t\t(invocation only)\n"), fp); | |
ccc6cda3 JA |
1785 | |
1786 | for (i = 0, set_opts = 0; shell_builtins[i].name; i++) | |
1787 | if (STREQ (shell_builtins[i].name, "set")) | |
1788 | set_opts = savestring (shell_builtins[i].short_doc); | |
1789 | if (set_opts) | |
726f6388 | 1790 | { |
7117c2d2 | 1791 | s = xstrchr (set_opts, '['); |
ccc6cda3 JA |
1792 | if (s == 0) |
1793 | s = set_opts; | |
1794 | while (*++s == '-') | |
1795 | ; | |
7117c2d2 | 1796 | t = xstrchr (s, ']'); |
ccc6cda3 JA |
1797 | if (t) |
1798 | *t = '\0'; | |
5e13499c | 1799 | fprintf (fp, _("\t-%s or -o option\n"), s); |
ccc6cda3 | 1800 | free (set_opts); |
726f6388 JA |
1801 | } |
1802 | ||
d166f048 JA |
1803 | if (extra) |
1804 | { | |
5e13499c CR |
1805 | fprintf (fp, _("Type `%s -c \"help set\"' for more information about shell options.\n"), shell_name); |
1806 | fprintf (fp, _("Type `%s -c help' for more information about shell builtin commands.\n"), shell_name); | |
1807 | fprintf (fp, _("Use the `bashbug' command to report bugs.\n")); | |
d166f048 | 1808 | } |
726f6388 JA |
1809 | } |
1810 | ||
f73dda09 JA |
1811 | static void |
1812 | add_shopt_to_alist (opt, on_or_off) | |
1813 | char *opt; | |
1814 | int on_or_off; | |
1815 | { | |
1816 | if (shopt_ind >= shopt_len) | |
1817 | { | |
1818 | shopt_len += 8; | |
1819 | shopt_alist = (STRING_INT_ALIST *)xrealloc (shopt_alist, shopt_len * sizeof (shopt_alist[0])); | |
1820 | } | |
1821 | shopt_alist[shopt_ind].word = opt; | |
1822 | shopt_alist[shopt_ind].token = on_or_off; | |
1823 | shopt_ind++; | |
1824 | } | |
1825 | ||
1826 | static void | |
1827 | run_shopt_alist () | |
1828 | { | |
1829 | register int i; | |
1830 | ||
1831 | for (i = 0; i < shopt_ind; i++) | |
1832 | if (shopt_setopt (shopt_alist[i].word, (shopt_alist[i].token == '-')) != EXECUTION_SUCCESS) | |
d3a24ed2 | 1833 | exit (EX_BADUSAGE); |
f73dda09 JA |
1834 | free (shopt_alist); |
1835 | shopt_alist = 0; | |
1836 | shopt_ind = shopt_len = 0; | |
1837 | } |