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