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bb70624e | 1 | /* shell.c -- GNU's idea of the POSIX shell specification. */ |
726f6388 | 2 | |
bb70624e | 3 | /* Copyright (C) 1987,1991 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" |
cce855bc JA |
30 | #ifndef _MINIX |
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 | ||
f73dda09 JA |
46 | #define NEED_SH_SETLINEBUF_DECL /* used in externs.h */ |
47 | ||
726f6388 JA |
48 | #include "shell.h" |
49 | #include "flags.h" | |
ccc6cda3 JA |
50 | #include "trap.h" |
51 | #include "mailcheck.h" | |
52 | #include "builtins.h" | |
53 | #include "builtins/common.h" | |
726f6388 JA |
54 | |
55 | #if defined (JOB_CONTROL) | |
56 | #include "jobs.h" | |
57 | #endif /* JOB_CONTROL */ | |
58 | ||
59 | #include "input.h" | |
60 | #include "execute_cmd.h" | |
cce855bc | 61 | #include "findcmd.h" |
726f6388 JA |
62 | |
63 | #if defined (HISTORY) | |
64 | # include "bashhist.h" | |
65 | # include <readline/history.h> | |
66 | #endif | |
67 | ||
68 | #include <tilde/tilde.h> | |
f73dda09 | 69 | #include <glob/strmatch.h> |
726f6388 | 70 | |
b72432fd JA |
71 | #if defined (__OPENNT) |
72 | # include <opennt/opennt.h> | |
73 | #endif | |
74 | ||
ccc6cda3 | 75 | #if !defined (HAVE_GETPW_DECLS) |
726f6388 | 76 | extern struct passwd *getpwuid (); |
ccc6cda3 | 77 | #endif /* !HAVE_GETPW_DECLS */ |
726f6388 | 78 | |
726f6388 JA |
79 | #if !defined (errno) |
80 | extern int errno; | |
81 | #endif | |
82 | ||
b72432fd JA |
83 | #if defined (NO_MAIN_ENV_ARG) |
84 | extern char **environ; /* used if no third argument to main() */ | |
85 | #endif | |
86 | ||
ccc6cda3 | 87 | extern char *dist_version, *release_status; |
726f6388 | 88 | extern int patch_level, build_version; |
bb70624e | 89 | extern int shell_level; |
ccc6cda3 | 90 | extern int subshell_environment; |
726f6388 | 91 | extern int last_command_exit_value; |
ccc6cda3 JA |
92 | extern int line_number; |
93 | extern char *primary_prompt, *secondary_prompt; | |
94 | extern int expand_aliases; | |
726f6388 | 95 | extern char *this_command_name; |
cce855bc | 96 | extern int array_needs_making; |
726f6388 JA |
97 | |
98 | /* Non-zero means that this shell has already been run; i.e. you should | |
99 | call shell_reinitialize () if you need to start afresh. */ | |
ccc6cda3 | 100 | int shell_initialized = 0; |
726f6388 JA |
101 | |
102 | COMMAND *global_command = (COMMAND *)NULL; | |
103 | ||
726f6388 JA |
104 | /* Information about the current user. */ |
105 | struct user_info current_user = | |
106 | { | |
f73dda09 JA |
107 | (uid_t)-1, (uid_t)-1, (gid_t)-1, (gid_t)-1, |
108 | (char *)NULL, (char *)NULL, (char *)NULL | |
726f6388 JA |
109 | }; |
110 | ||
111 | /* The current host's name. */ | |
112 | char *current_host_name = (char *)NULL; | |
113 | ||
114 | /* Non-zero means that this shell is a login shell. | |
115 | Specifically: | |
116 | 0 = not login shell. | |
117 | 1 = login shell from getty (or equivalent fake out) | |
b72432fd | 118 | -1 = login shell from "--login" flag. |
726f6388 JA |
119 | -2 = both from getty, and from flag. |
120 | */ | |
121 | int login_shell = 0; | |
122 | ||
123 | /* Non-zero means that at this moment, the shell is interactive. In | |
124 | general, this means that the shell is at this moment reading input | |
125 | from the keyboard. */ | |
126 | int interactive = 0; | |
127 | ||
128 | /* Non-zero means that the shell was started as an interactive shell. */ | |
129 | int interactive_shell = 0; | |
130 | ||
cce855bc JA |
131 | /* Non-zero means to send a SIGHUP to all jobs when an interactive login |
132 | shell exits. */ | |
133 | int hup_on_exit = 0; | |
134 | ||
726f6388 JA |
135 | /* Tells what state the shell was in when it started: |
136 | 0 = non-interactive shell script | |
137 | 1 = interactive | |
138 | 2 = -c command | |
139 | This is a superset of the information provided by interactive_shell. | |
140 | */ | |
141 | int startup_state = 0; | |
142 | ||
143 | /* Special debugging helper. */ | |
144 | int debugging_login_shell = 0; | |
145 | ||
146 | /* The environment that the shell passes to other commands. */ | |
147 | char **shell_environment; | |
148 | ||
149 | /* Non-zero when we are executing a top-level command. */ | |
150 | int executing = 0; | |
151 | ||
152 | /* The number of commands executed so far. */ | |
153 | int current_command_number = 1; | |
154 | ||
726f6388 JA |
155 | /* Non-zero is the recursion depth for commands. */ |
156 | int indirection_level = 0; | |
157 | ||
726f6388 JA |
158 | /* The name of this shell, as taken from argv[0]. */ |
159 | char *shell_name = (char *)NULL; | |
160 | ||
161 | /* time in seconds when the shell was started */ | |
162 | time_t shell_start_time; | |
163 | ||
ccc6cda3 JA |
164 | /* Are we running in an emacs shell window? */ |
165 | int running_under_emacs; | |
166 | ||
726f6388 JA |
167 | /* The name of the .(shell)rc file. */ |
168 | static char *bashrc_file = "~/.bashrc"; | |
169 | ||
170 | /* Non-zero means to act more like the Bourne shell on startup. */ | |
ccc6cda3 JA |
171 | static int act_like_sh; |
172 | ||
173 | /* Non-zero if this shell is being run by `su'. */ | |
174 | static int su_shell; | |
175 | ||
176 | /* Non-zero if we have already expanded and sourced $ENV. */ | |
177 | static int sourced_env; | |
178 | ||
179 | /* Is this shell running setuid? */ | |
180 | static int running_setuid; | |
726f6388 JA |
181 | |
182 | /* Values for the long-winded argument names. */ | |
ccc6cda3 JA |
183 | static int debugging; /* Do debugging things. */ |
184 | static int no_rc; /* Don't execute ~/.bashrc */ | |
185 | static int no_profile; /* Don't execute .profile */ | |
186 | static int do_version; /* Display interesting version info. */ | |
187 | static int make_login_shell; /* Make this shell be a `-bash' shell. */ | |
188 | static int want_initial_help; /* --help option */ | |
726f6388 JA |
189 | |
190 | int no_line_editing = 0; /* Don't do fancy line editing. */ | |
726f6388 | 191 | int posixly_correct = 0; /* Non-zero means posix.2 superset. */ |
ccc6cda3 | 192 | int dump_translatable_strings; /* Dump strings in $"...", don't execute. */ |
cce855bc JA |
193 | int dump_po_strings; /* Dump strings in $"..." in po format */ |
194 | int wordexp_only = 0; /* Do word expansion only */ | |
726f6388 JA |
195 | |
196 | /* Some long-winded argument names. These are obviously new. */ | |
197 | #define Int 1 | |
198 | #define Charp 2 | |
199 | struct { | |
200 | char *name; | |
201 | int type; | |
202 | int *int_value; | |
203 | char **char_value; | |
204 | } long_args[] = { | |
205 | { "debug", Int, &debugging, (char **)0x0 }, | |
cce855bc | 206 | { "dump-po-strings", Int, &dump_po_strings, (char **)0x0 }, |
ccc6cda3 JA |
207 | { "dump-strings", Int, &dump_translatable_strings, (char **)0x0 }, |
208 | { "help", Int, &want_initial_help, (char **)0x0 }, | |
28ef6c31 | 209 | { "init-file", Charp, (int *)0x0, &bashrc_file }, |
ccc6cda3 JA |
210 | { "login", Int, &make_login_shell, (char **)0x0 }, |
211 | { "noediting", Int, &no_line_editing, (char **)0x0 }, | |
726f6388 | 212 | { "noprofile", Int, &no_profile, (char **)0x0 }, |
ccc6cda3 JA |
213 | { "norc", Int, &no_rc, (char **)0x0 }, |
214 | { "posix", Int, &posixly_correct, (char **)0x0 }, | |
726f6388 | 215 | { "rcfile", Charp, (int *)0x0, &bashrc_file }, |
ccc6cda3 JA |
216 | #if defined (RESTRICTED_SHELL) |
217 | { "restricted", Int, &restricted, (char **)0x0 }, | |
218 | #endif | |
219 | { "verbose", Int, &echo_input_at_read, (char **)0x0 }, | |
726f6388 | 220 | { "version", Int, &do_version, (char **)0x0 }, |
cce855bc | 221 | { "wordexp", Int, &wordexp_only, (char **)0x0 }, |
726f6388 JA |
222 | { (char *)0x0, Int, (int *)0x0, (char **)0x0 } |
223 | }; | |
224 | ||
225 | /* These are extern so execute_simple_command can set them, and then | |
226 | longjmp back to main to execute a shell script, instead of calling | |
227 | main () again and resulting in indefinite, possibly fatal, stack | |
228 | growth. */ | |
ccc6cda3 | 229 | procenv_t subshell_top_level; |
726f6388 JA |
230 | int subshell_argc; |
231 | char **subshell_argv; | |
232 | char **subshell_envp; | |
233 | ||
234 | #if defined (BUFFERED_INPUT) | |
235 | /* The file descriptor from which the shell is reading input. */ | |
236 | int default_buffered_input = -1; | |
237 | #endif | |
238 | ||
bb70624e JA |
239 | /* The following two variables are not static so they can show up in $-. */ |
240 | int read_from_stdin; /* -s flag supplied */ | |
241 | int want_pending_command; /* -c flag supplied */ | |
242 | ||
28ef6c31 | 243 | static int shell_reinitialized = 0; |
726f6388 JA |
244 | static char *local_pending_command; |
245 | ||
ccc6cda3 JA |
246 | static FILE *default_input; |
247 | ||
f73dda09 JA |
248 | static STRING_INT_ALIST *shopt_alist; |
249 | static int shopt_ind = 0, shopt_len = 0; | |
250 | ||
251 | static int parse_long_options __P((char **, int, int)); | |
252 | static int parse_shell_options __P((char **, int, int)); | |
253 | static int bind_args __P((char **, int, int, int)); | |
254 | ||
255 | static void add_shopt_to_alist __P((char *, int)); | |
256 | static void run_shopt_alist __P((void)); | |
ccc6cda3 | 257 | |
f73dda09 JA |
258 | static void execute_env_file __P((char *)); |
259 | static void run_startup_files __P((void)); | |
260 | static int open_shell_script __P((char *)); | |
261 | static void set_bash_input __P((void)); | |
262 | static int run_one_command __P((char *)); | |
263 | static int run_wordexp __P((char *)); | |
726f6388 | 264 | |
f73dda09 JA |
265 | static int uidget __P((void)); |
266 | static int isnetconn __P((int)); | |
726f6388 | 267 | |
f73dda09 JA |
268 | static void init_interactive __P((void)); |
269 | static void init_noninteractive __P((void)); | |
270 | ||
271 | static void set_shell_name __P((char *)); | |
272 | static void shell_initialize __P((void)); | |
273 | static void shell_reinitialize __P((void)); | |
274 | ||
275 | static void show_shell_usage __P((FILE *, int)); | |
ccc6cda3 | 276 | |
28ef6c31 | 277 | #ifdef __CYGWIN__ |
cce855bc JA |
278 | static void |
279 | _cygwin32_check_tmp () | |
280 | { | |
281 | struct stat sb; | |
282 | ||
283 | if (stat ("/tmp", &sb) < 0) | |
284 | internal_warning ("could not find /tmp, please create!"); | |
285 | else | |
286 | { | |
287 | if (S_ISDIR (sb.st_mode) == 0) | |
288 | internal_warning ("/tmp must be a valid directory name"); | |
289 | } | |
290 | } | |
28ef6c31 | 291 | #endif /* __CYGWIN__ */ |
cce855bc | 292 | |
b72432fd JA |
293 | #if defined (NO_MAIN_ENV_ARG) |
294 | /* systems without third argument to main() */ | |
295 | int | |
296 | main (argc, argv) | |
297 | int argc; | |
298 | char **argv; | |
299 | #else /* !NO_MAIN_ENV_ARG */ | |
ccc6cda3 | 300 | int |
726f6388 JA |
301 | main (argc, argv, env) |
302 | int argc; | |
303 | char **argv, **env; | |
b72432fd | 304 | #endif /* !NO_MAIN_ENV_ARG */ |
726f6388 JA |
305 | { |
306 | register int i; | |
f73dda09 JA |
307 | int code, old_errexit_flag; |
308 | #if defined (RESTRICTED_SHELL) | |
309 | int saverst; | |
310 | #endif | |
ccc6cda3 JA |
311 | volatile int locally_skip_execution; |
312 | volatile int arg_index, top_level_arg_index; | |
b72432fd JA |
313 | #ifdef __OPENNT |
314 | char **env; | |
315 | ||
316 | env = environ; | |
317 | #endif /* __OPENNT */ | |
ccc6cda3 | 318 | |
f73dda09 JA |
319 | USE_VAR(argc); |
320 | USE_VAR(argv); | |
321 | USE_VAR(env); | |
322 | USE_VAR(code); | |
323 | USE_VAR(old_errexit_flag); | |
324 | #if defined (RESTRICTED_SHELL) | |
325 | USE_VAR(saverst); | |
326 | #endif | |
327 | ||
ccc6cda3 JA |
328 | /* Catch early SIGINTs. */ |
329 | code = setjmp (top_level); | |
330 | if (code) | |
331 | exit (2); | |
332 | ||
f73dda09 JA |
333 | #if defined (USING_BASH_MALLOC) && defined (DEBUG) |
334 | # if 0 /* memory tracing */ | |
335 | malloc_set_trace(1); | |
336 | # endif | |
337 | ||
338 | # if 0 | |
339 | malloc_set_register (1); | |
340 | # endif | |
341 | #endif | |
342 | ||
ccc6cda3 | 343 | check_dev_tty (); |
726f6388 | 344 | |
28ef6c31 | 345 | #ifdef __CYGWIN__ |
cce855bc | 346 | _cygwin32_check_tmp (); |
28ef6c31 | 347 | #endif /* __CYGWIN__ */ |
cce855bc | 348 | |
726f6388 JA |
349 | /* Wait forever if we are debugging a login shell. */ |
350 | while (debugging_login_shell); | |
351 | ||
ccc6cda3 | 352 | set_default_locale (); |
726f6388 | 353 | |
ccc6cda3 | 354 | running_setuid = uidget (); |
726f6388 | 355 | |
28ef6c31 JA |
356 | if (getenv ("POSIXLY_CORRECT") || getenv ("POSIX_PEDANTIC")) |
357 | posixly_correct = 1; | |
726f6388 JA |
358 | |
359 | #if defined (USE_GNU_MALLOC_LIBRARY) | |
360 | mcheck (programming_error, (void (*) ())0); | |
361 | #endif /* USE_GNU_MALLOC_LIBRARY */ | |
362 | ||
363 | if (setjmp (subshell_top_level)) | |
364 | { | |
365 | argc = subshell_argc; | |
366 | argv = subshell_argv; | |
367 | env = subshell_envp; | |
368 | sourced_env = 0; | |
369 | } | |
370 | ||
28ef6c31 JA |
371 | shell_reinitialized = 0; |
372 | ||
ccc6cda3 | 373 | /* Initialize `local' variables for all `invocations' of main (). */ |
726f6388 JA |
374 | arg_index = 1; |
375 | local_pending_command = (char *)NULL; | |
ccc6cda3 | 376 | want_pending_command = locally_skip_execution = read_from_stdin = 0; |
726f6388 JA |
377 | default_input = stdin; |
378 | #if defined (BUFFERED_INPUT) | |
379 | default_buffered_input = -1; | |
380 | #endif | |
381 | ||
382 | /* Fix for the `infinite process creation' bug when running shell scripts | |
383 | from startup files on System V. */ | |
384 | login_shell = make_login_shell = 0; | |
385 | ||
386 | /* If this shell has already been run, then reinitialize it to a | |
387 | vanilla state. */ | |
388 | if (shell_initialized || shell_name) | |
389 | { | |
390 | /* Make sure that we do not infinitely recurse as a login shell. */ | |
391 | if (*shell_name == '-') | |
392 | shell_name++; | |
393 | ||
394 | shell_reinitialize (); | |
395 | if (setjmp (top_level)) | |
396 | exit (2); | |
397 | } | |
398 | ||
726f6388 | 399 | shell_environment = env; |
ccc6cda3 | 400 | set_shell_name (argv[0]); |
726f6388 JA |
401 | shell_start_time = NOW; /* NOW now defined in general.h */ |
402 | ||
726f6388 JA |
403 | /* Parse argument flags from the input line. */ |
404 | ||
405 | /* Find full word arguments first. */ | |
ccc6cda3 JA |
406 | arg_index = parse_long_options (argv, arg_index, argc); |
407 | ||
408 | if (want_initial_help) | |
726f6388 | 409 | { |
d166f048 | 410 | show_shell_usage (stdout, 1); |
ccc6cda3 | 411 | exit (EXECUTION_SUCCESS); |
726f6388 JA |
412 | } |
413 | ||
ccc6cda3 JA |
414 | if (do_version) |
415 | { | |
416 | show_shell_version (1); | |
417 | exit (EXECUTION_SUCCESS); | |
418 | } | |
726f6388 | 419 | |
ccc6cda3 | 420 | /* If user supplied the "--login" flag, then set and invert LOGIN_SHELL. */ |
726f6388 JA |
421 | if (make_login_shell) |
422 | { | |
423 | login_shell++; | |
424 | login_shell = -login_shell; | |
425 | } | |
426 | ||
f73dda09 JA |
427 | set_login_shell (login_shell != 0); |
428 | ||
726f6388 JA |
429 | /* All done with full word options; do standard shell option parsing.*/ |
430 | this_command_name = shell_name; /* for error reporting */ | |
ccc6cda3 | 431 | arg_index = parse_shell_options (argv, arg_index, argc); |
726f6388 | 432 | |
cce855bc JA |
433 | if (dump_po_strings) |
434 | dump_translatable_strings = 1; | |
435 | ||
ccc6cda3 JA |
436 | if (dump_translatable_strings) |
437 | read_but_dont_execute = 1; | |
726f6388 | 438 | |
ccc6cda3 JA |
439 | if (running_setuid && privileged_mode == 0) |
440 | disable_priv_mode (); | |
726f6388 JA |
441 | |
442 | /* Need to get the argument to a -c option processed in the | |
443 | above loop. The next arg is a command to execute, and the | |
444 | following args are $0...$n respectively. */ | |
445 | if (want_pending_command) | |
446 | { | |
447 | local_pending_command = argv[arg_index]; | |
ccc6cda3 | 448 | if (local_pending_command == 0) |
726f6388 | 449 | { |
ccc6cda3 JA |
450 | report_error ("option `-c' requires an argument"); |
451 | exit (EX_USAGE); | |
726f6388 JA |
452 | } |
453 | arg_index++; | |
454 | } | |
ccc6cda3 | 455 | this_command_name = (char *)NULL; |
726f6388 JA |
456 | |
457 | /* First, let the outside world know about our interactive status. | |
458 | A shell is interactive if the `-i' flag was given, or if all of | |
459 | the following conditions are met: | |
460 | no -c command | |
461 | no arguments remaining or the -s flag given | |
462 | standard input is a terminal | |
463 | standard output is a terminal | |
464 | Refer to Posix.2, the description of the `sh' utility. */ | |
465 | ||
466 | if (forced_interactive || /* -i flag */ | |
467 | (!local_pending_command && /* No -c command and ... */ | |
cce855bc | 468 | wordexp_only == 0 && /* No --wordexp and ... */ |
726f6388 JA |
469 | ((arg_index == argc) || /* no remaining args or... */ |
470 | read_from_stdin) && /* -s flag with args, and */ | |
471 | isatty (fileno (stdin)) && /* Input is a terminal and */ | |
472 | isatty (fileno (stdout)))) /* output is a terminal. */ | |
ccc6cda3 | 473 | init_interactive (); |
726f6388 | 474 | else |
ccc6cda3 | 475 | init_noninteractive (); |
726f6388 JA |
476 | |
477 | #define CLOSE_FDS_AT_LOGIN | |
478 | #if defined (CLOSE_FDS_AT_LOGIN) | |
479 | /* | |
480 | * Some systems have the bad habit of starting login shells with lots of open | |
481 | * file descriptors. For instance, most systems that have picked up the | |
482 | * pre-4.0 Sun YP code leave a file descriptor open each time you call one | |
483 | * of the getpw* functions, and it's set to be open across execs. That | |
484 | * means one for login, one for xterm, one for shelltool, etc. | |
485 | */ | |
486 | if (login_shell && interactive_shell) | |
487 | { | |
488 | for (i = 3; i < 20; i++) | |
489 | close (i); | |
490 | } | |
491 | #endif /* CLOSE_FDS_AT_LOGIN */ | |
492 | ||
d166f048 JA |
493 | /* If we're in a strict Posix.2 mode, turn on interactive comments and |
494 | other Posix.2 things. */ | |
495 | if (posixly_correct) | |
496 | { | |
28ef6c31 JA |
497 | bind_variable ("POSIXLY_CORRECT", "y"); |
498 | sv_strict_posix ("POSIXLY_CORRECT"); | |
d166f048 JA |
499 | } |
500 | ||
f73dda09 JA |
501 | /* Now we run the shopt_alist and process the options. */ |
502 | if (shopt_alist) | |
503 | run_shopt_alist (); | |
504 | ||
726f6388 JA |
505 | /* From here on in, the shell must be a normal functioning shell. |
506 | Variables from the environment are expected to be set, etc. */ | |
507 | shell_initialize (); | |
508 | ||
ccc6cda3 JA |
509 | set_default_locale_vars (); |
510 | ||
726f6388 JA |
511 | if (interactive_shell) |
512 | { | |
ccc6cda3 JA |
513 | char *term; |
514 | ||
515 | term = getenv ("TERM"); | |
726f6388 | 516 | no_line_editing |= term && (STREQ (term, "emacs")); |
ccc6cda3 | 517 | term = getenv ("EMACS"); |
f73dda09 | 518 | running_under_emacs = term ? ((strmatch ("*term*", term, 0) == 0) ? 2 : 1) |
ccc6cda3 | 519 | : 0; |
726f6388 JA |
520 | } |
521 | ||
522 | top_level_arg_index = arg_index; | |
b72432fd | 523 | old_errexit_flag = exit_immediately_on_error; |
726f6388 | 524 | |
726f6388 JA |
525 | /* Give this shell a place to longjmp to before executing the |
526 | startup files. This allows users to press C-c to abort the | |
527 | lengthy startup. */ | |
ccc6cda3 JA |
528 | code = setjmp (top_level); |
529 | if (code) | |
530 | { | |
531 | if (code == EXITPROG) | |
532 | exit_shell (last_command_exit_value); | |
533 | else | |
d166f048 JA |
534 | { |
535 | #if defined (JOB_CONTROL) | |
536 | /* Reset job control, since run_startup_files turned it off. */ | |
537 | set_job_control (interactive_shell); | |
538 | #endif | |
b72432fd JA |
539 | /* Reset value of `set -e', since it's turned off before running |
540 | the startup files. */ | |
541 | exit_immediately_on_error += old_errexit_flag; | |
d166f048 JA |
542 | locally_skip_execution++; |
543 | } | |
ccc6cda3 | 544 | } |
726f6388 JA |
545 | |
546 | arg_index = top_level_arg_index; | |
547 | ||
548 | /* Execute the start-up scripts. */ | |
549 | ||
ccc6cda3 | 550 | if (interactive_shell == 0) |
726f6388 JA |
551 | { |
552 | makunbound ("PS1", shell_variables); | |
553 | makunbound ("PS2", shell_variables); | |
28ef6c31 JA |
554 | interactive = 0; |
555 | expand_aliases = posixly_correct; | |
726f6388 JA |
556 | } |
557 | else | |
558 | { | |
559 | change_flag ('i', FLAG_ON); | |
560 | interactive = 1; | |
561 | } | |
562 | ||
e8ce775d | 563 | #if defined (RESTRICTED_SHELL) |
b72432fd JA |
564 | /* Set restricted_shell based on whether the basename of $0 indicates that |
565 | the shell should be restricted or if the `-r' option was supplied at | |
566 | startup. */ | |
567 | restricted_shell = shell_is_restricted (shell_name); | |
568 | ||
e8ce775d JA |
569 | /* If the `-r' option is supplied at invocation, make sure that the shell |
570 | is not in restricted mode when running the startup files. */ | |
b72432fd JA |
571 | saverst = restricted; |
572 | restricted = 0; | |
e8ce775d JA |
573 | #endif |
574 | ||
b72432fd | 575 | /* The startup files are run with `set -e' temporarily disabled. */ |
ccc6cda3 | 576 | if (locally_skip_execution == 0 && running_setuid == 0) |
b72432fd JA |
577 | { |
578 | old_errexit_flag = exit_immediately_on_error; | |
579 | exit_immediately_on_error = 0; | |
580 | ||
581 | run_startup_files (); | |
b72432fd JA |
582 | exit_immediately_on_error += old_errexit_flag; |
583 | } | |
726f6388 | 584 | |
ccc6cda3 JA |
585 | /* If we are invoked as `sh', turn on Posix mode. */ |
586 | if (act_like_sh) | |
d166f048 | 587 | { |
28ef6c31 JA |
588 | bind_variable ("POSIXLY_CORRECT", "y"); |
589 | sv_strict_posix ("POSIXLY_CORRECT"); | |
d166f048 | 590 | } |
ccc6cda3 | 591 | |
726f6388 | 592 | #if defined (RESTRICTED_SHELL) |
cce855bc | 593 | /* Turn on the restrictions after executing the startup files. This |
e8ce775d JA |
594 | means that `bash -r' or `set -r' invoked from a startup file will |
595 | turn on the restrictions after the startup files are executed. */ | |
596 | restricted = saverst || restricted; | |
28ef6c31 JA |
597 | if (shell_reinitialized == 0) |
598 | maybe_make_restricted (shell_name); | |
726f6388 JA |
599 | #endif /* RESTRICTED_SHELL */ |
600 | ||
cce855bc JA |
601 | if (wordexp_only) |
602 | { | |
603 | startup_state = 3; | |
604 | last_command_exit_value = run_wordexp (argv[arg_index]); | |
605 | exit_shell (last_command_exit_value); | |
606 | } | |
607 | ||
ccc6cda3 JA |
608 | if (local_pending_command) |
609 | { | |
610 | arg_index = bind_args (argv, arg_index, argc, 0); | |
ccc6cda3 | 611 | startup_state = 2; |
726f6388 | 612 | #if defined (ONESHOT) |
f73dda09 | 613 | executing = 1; |
ccc6cda3 JA |
614 | run_one_command (local_pending_command); |
615 | exit_shell (last_command_exit_value); | |
726f6388 | 616 | #else /* ONESHOT */ |
ccc6cda3 JA |
617 | with_input_from_string (local_pending_command, "-c"); |
618 | goto read_and_execute; | |
726f6388 | 619 | #endif /* !ONESHOT */ |
ccc6cda3 JA |
620 | } |
621 | ||
622 | /* Get possible input filename and set up default_buffered_input or | |
623 | default_input as appropriate. */ | |
624 | if (arg_index != argc && read_from_stdin == 0) | |
625 | { | |
626 | open_shell_script (argv[arg_index]); | |
627 | arg_index++; | |
628 | } | |
629 | else if (interactive == 0) | |
630 | /* In this mode, bash is reading a script from stdin, which is a | |
631 | pipe or redirected file. */ | |
632 | #if defined (BUFFERED_INPUT) | |
633 | default_buffered_input = fileno (stdin); /* == 0 */ | |
634 | #else | |
635 | setbuf (default_input, (char *)NULL); | |
636 | #endif /* !BUFFERED_INPUT */ | |
637 | ||
638 | set_bash_input (); | |
639 | ||
640 | /* Bind remaining args to $1 ... $n */ | |
641 | arg_index = bind_args (argv, arg_index, argc, 1); | |
726f6388 JA |
642 | /* Do the things that should be done only for interactive shells. */ |
643 | if (interactive_shell) | |
644 | { | |
645 | /* Set up for checking for presence of mail. */ | |
646 | remember_mail_dates (); | |
647 | reset_mail_timer (); | |
648 | ||
649 | #if defined (HISTORY) | |
650 | /* Initialize the interactive history stuff. */ | |
ccc6cda3 JA |
651 | bash_initialize_history (); |
652 | if (shell_initialized == 0) | |
726f6388 JA |
653 | load_history (); |
654 | #endif /* HISTORY */ | |
655 | ||
656 | /* Initialize terminal state for interactive shells after the | |
657 | .bash_profile and .bashrc are interpreted. */ | |
658 | get_tty_state (); | |
659 | } | |
660 | ||
ccc6cda3 JA |
661 | #if !defined (ONESHOT) |
662 | read_and_execute: | |
663 | #endif /* !ONESHOT */ | |
726f6388 | 664 | |
ccc6cda3 | 665 | shell_initialized = 1; |
726f6388 | 666 | |
ccc6cda3 JA |
667 | /* Read commands until exit condition. */ |
668 | reader_loop (); | |
669 | exit_shell (last_command_exit_value); | |
670 | } | |
726f6388 | 671 | |
ccc6cda3 JA |
672 | static int |
673 | parse_long_options (argv, arg_start, arg_end) | |
674 | char **argv; | |
675 | int arg_start, arg_end; | |
676 | { | |
677 | int arg_index, longarg, i; | |
678 | char *arg_string; | |
679 | ||
680 | arg_index = arg_start; | |
681 | while ((arg_index != arg_end) && (arg_string = argv[arg_index]) && | |
682 | (*arg_string == '-')) | |
683 | { | |
684 | longarg = 0; | |
685 | ||
686 | /* Make --login equivalent to -login. */ | |
687 | if (arg_string[1] == '-' && arg_string[2]) | |
726f6388 | 688 | { |
ccc6cda3 JA |
689 | longarg = 1; |
690 | arg_string++; | |
726f6388 JA |
691 | } |
692 | ||
ccc6cda3 | 693 | for (i = 0; long_args[i].name; i++) |
726f6388 | 694 | { |
ccc6cda3 | 695 | if (STREQ (arg_string + 1, long_args[i].name)) |
726f6388 | 696 | { |
ccc6cda3 JA |
697 | if (long_args[i].type == Int) |
698 | *long_args[i].int_value = 1; | |
699 | else if (argv[++arg_index] == 0) | |
700 | { | |
701 | report_error ("option `%s' requires an argument", | |
702 | long_args[i].name); | |
703 | exit (EX_USAGE); | |
704 | } | |
705 | else | |
706 | *long_args[i].char_value = argv[arg_index]; | |
707 | ||
708 | break; | |
726f6388 | 709 | } |
726f6388 | 710 | } |
ccc6cda3 | 711 | if (long_args[i].name == 0) |
726f6388 | 712 | { |
ccc6cda3 JA |
713 | if (longarg) |
714 | { | |
715 | report_error ("%s: unrecognized option", argv[arg_index]); | |
d166f048 | 716 | show_shell_usage (stderr, 0); |
ccc6cda3 JA |
717 | exit (EX_USAGE); |
718 | } | |
719 | break; /* No such argument. Maybe flag arg. */ | |
726f6388 | 720 | } |
726f6388 | 721 | |
ccc6cda3 JA |
722 | arg_index++; |
723 | } | |
724 | ||
725 | return (arg_index); | |
726 | } | |
727 | ||
728 | static int | |
729 | parse_shell_options (argv, arg_start, arg_end) | |
730 | char **argv; | |
731 | int arg_start, arg_end; | |
732 | { | |
733 | int arg_index; | |
734 | int arg_character, on_or_off, next_arg, i; | |
735 | char *o_option, *arg_string; | |
736 | ||
737 | arg_index = arg_start; | |
738 | while (arg_index != arg_end && (arg_string = argv[arg_index]) && | |
739 | (*arg_string == '-' || *arg_string == '+')) | |
740 | { | |
741 | /* There are flag arguments, so parse them. */ | |
742 | next_arg = arg_index + 1; | |
743 | ||
744 | /* A single `-' signals the end of options. From the 4.3 BSD sh. | |
745 | An option `--' means the same thing; this is the standard | |
746 | getopt(3) meaning. */ | |
747 | if (arg_string[0] == '-' && | |
748 | (arg_string[1] == '\0' || | |
749 | (arg_string[1] == '-' && arg_string[2] == '\0'))) | |
750 | return (next_arg); | |
726f6388 | 751 | |
ccc6cda3 JA |
752 | i = 1; |
753 | on_or_off = arg_string[0]; | |
754 | while (arg_character = arg_string[i++]) | |
726f6388 | 755 | { |
ccc6cda3 JA |
756 | switch (arg_character) |
757 | { | |
758 | case 'c': | |
759 | want_pending_command = 1; | |
760 | break; | |
761 | ||
762 | case 's': | |
763 | read_from_stdin = 1; | |
764 | break; | |
765 | ||
766 | case 'o': | |
767 | o_option = argv[next_arg]; | |
768 | if (o_option == 0) | |
769 | { | |
cce855bc | 770 | list_minus_o_opts (-1, (on_or_off == '-') ? 0 : 1); |
ccc6cda3 JA |
771 | break; |
772 | } | |
773 | if (set_minus_o_option (on_or_off, o_option) != EXECUTION_SUCCESS) | |
774 | exit (EX_USAGE); | |
775 | next_arg++; | |
776 | break; | |
777 | ||
f73dda09 JA |
778 | case 'O': |
779 | /* Since some of these can be overridden by the normal | |
780 | interactive/non-interactive shell initialization or | |
781 | initializing posix mode, we save the options and process | |
782 | them after initialization. */ | |
783 | o_option = argv[next_arg]; | |
784 | if (o_option == 0) | |
785 | { | |
786 | shopt_listopt (o_option, (on_or_off == '-') ? 0 : 1); | |
787 | break; | |
788 | } | |
789 | add_shopt_to_alist (o_option, on_or_off); | |
790 | next_arg++; | |
791 | break; | |
792 | ||
ccc6cda3 JA |
793 | case 'D': |
794 | dump_translatable_strings = 1; | |
795 | break; | |
796 | ||
797 | default: | |
798 | if (change_flag (arg_character, on_or_off) == FLAG_ERROR) | |
799 | { | |
800 | report_error ("%c%c: unrecognized option", on_or_off, arg_character); | |
d166f048 | 801 | show_shell_usage (stderr, 0); |
ccc6cda3 JA |
802 | exit (EX_USAGE); |
803 | } | |
804 | } | |
726f6388 | 805 | } |
ccc6cda3 JA |
806 | /* Can't do just a simple increment anymore -- what about |
807 | "bash -abouo emacs ignoreeof -hP"? */ | |
808 | arg_index = next_arg; | |
809 | } | |
726f6388 | 810 | |
ccc6cda3 JA |
811 | return (arg_index); |
812 | } | |
726f6388 | 813 | |
ccc6cda3 | 814 | /* Exit the shell with status S. */ |
cce855bc | 815 | void |
ccc6cda3 JA |
816 | exit_shell (s) |
817 | int s; | |
818 | { | |
819 | /* Do trap[0] if defined. Allow it to override the exit status | |
820 | passed to us. */ | |
821 | if (signal_is_trapped (0)) | |
822 | s = run_exit_trap (); | |
823 | ||
824 | #if defined (PROCESS_SUBSTITUTION) | |
825 | unlink_fifo_list (); | |
826 | #endif /* PROCESS_SUBSTITUTION */ | |
726f6388 | 827 | |
726f6388 | 828 | #if defined (HISTORY) |
ccc6cda3 JA |
829 | if (interactive_shell) |
830 | maybe_save_shell_history (); | |
726f6388 | 831 | #endif /* HISTORY */ |
ccc6cda3 | 832 | |
726f6388 | 833 | #if defined (JOB_CONTROL) |
cce855bc JA |
834 | /* If the user has run `shopt -s huponexit', hangup all jobs when we exit |
835 | an interactive login shell. ksh does this unconditionally. */ | |
836 | if (interactive_shell && login_shell && hup_on_exit) | |
837 | hangup_all_jobs (); | |
838 | ||
ccc6cda3 | 839 | /* If this shell is interactive, terminate all stopped jobs and |
28ef6c31 JA |
840 | restore the original terminal process group. Don't do this if we're |
841 | in a subshell and calling exit_shell after, for example, a failed | |
842 | word expansion. */ | |
843 | if (subshell_environment == 0) | |
844 | end_job_control (); | |
726f6388 JA |
845 | #endif /* JOB_CONTROL */ |
846 | ||
847 | /* Always return the exit status of the last command to our parent. */ | |
ccc6cda3 | 848 | exit (s); |
726f6388 JA |
849 | } |
850 | ||
f73dda09 | 851 | #ifdef INCLUDE_UNUSED |
bb70624e JA |
852 | /* A wrapper for exit that (optionally) can do other things, like malloc |
853 | statistics tracing. */ | |
854 | void | |
855 | sh_exit (s) | |
856 | int s; | |
857 | { | |
858 | exit (s); | |
859 | } | |
f73dda09 | 860 | #endif |
bb70624e | 861 | |
726f6388 JA |
862 | /* Source the bash startup files. If POSIXLY_CORRECT is non-zero, we obey |
863 | the Posix.2 startup file rules: $ENV is expanded, and if the file it | |
864 | names exists, that file is sourced. The Posix.2 rules are in effect | |
ccc6cda3 | 865 | for interactive shells only. (section 4.56.5.3) */ |
726f6388 | 866 | |
ccc6cda3 JA |
867 | /* Execute ~/.bashrc for most shells. Never execute it if |
868 | ACT_LIKE_SH is set, or if NO_RC is set. | |
726f6388 | 869 | |
ccc6cda3 | 870 | If the executable file "/usr/gnu/src/bash/foo" contains: |
726f6388 | 871 | |
ccc6cda3 JA |
872 | #!/usr/gnu/bin/bash |
873 | echo hello | |
726f6388 | 874 | |
ccc6cda3 | 875 | then: |
726f6388 | 876 | |
28ef6c31 JA |
877 | COMMAND EXECUTE BASHRC |
878 | -------------------------------- | |
879 | bash -c foo NO | |
880 | bash foo NO | |
881 | foo NO | |
882 | rsh machine ls YES (for rsh, which calls `bash -c') | |
883 | rsh machine foo YES (for shell started by rsh) NO (for foo!) | |
884 | echo ls | bash NO | |
885 | login NO | |
886 | bash YES | |
ccc6cda3 JA |
887 | */ |
888 | ||
889 | static void | |
890 | execute_env_file (env_file) | |
891 | char *env_file; | |
892 | { | |
893 | char *fn; | |
ccc6cda3 JA |
894 | |
895 | if (env_file && *env_file) | |
896 | { | |
f73dda09 JA |
897 | fn = expand_string_unsplit_to_string (env_file, Q_DOUBLE_QUOTES); |
898 | if (fn && *fn) | |
899 | maybe_execute_file (fn, 1); | |
900 | FREE (fn); | |
726f6388 | 901 | } |
ccc6cda3 | 902 | } |
726f6388 | 903 | |
ccc6cda3 JA |
904 | static void |
905 | run_startup_files () | |
906 | { | |
d166f048 JA |
907 | #if defined (JOB_CONTROL) |
908 | int old_job_control; | |
909 | #endif | |
cce855bc | 910 | int sourced_login, run_by_ssh; |
d166f048 | 911 | |
cce855bc | 912 | /* get the rshd/sshd case out of the way first. */ |
ccc6cda3 | 913 | if (interactive_shell == 0 && no_rc == 0 && login_shell == 0 && |
cce855bc | 914 | act_like_sh == 0 && local_pending_command) |
726f6388 | 915 | { |
f73dda09 JA |
916 | #ifdef SSH_SOURCE_BASHRC |
917 | run_by_ssh = (find_variable ("SSH_CLIENT") != (SHELL_VAR *)0) || | |
918 | (find_variable ("SSH2_CLIENT") != (SHELL_VAR *)0); | |
919 | #else | |
920 | run_by_ssh = 0; | |
921 | #endif | |
cce855bc JA |
922 | |
923 | /* If we were run by sshd or we think we were run by rshd, execute | |
bb70624e JA |
924 | ~/.bashrc if we are a top-level shell. */ |
925 | if ((run_by_ssh || isnetconn (fileno (stdin))) && shell_level < 2) | |
cce855bc | 926 | { |
ccc6cda3 | 927 | #ifdef SYS_BASHRC |
b72432fd JA |
928 | # if defined (__OPENNT) |
929 | maybe_execute_file (_prefixInstallPath(SYS_BASHRC, NULL, 0), 1); | |
930 | # else | |
cce855bc | 931 | maybe_execute_file (SYS_BASHRC, 1); |
b72432fd | 932 | # endif |
ccc6cda3 | 933 | #endif |
cce855bc JA |
934 | maybe_execute_file (bashrc_file, 1); |
935 | return; | |
936 | } | |
ccc6cda3 | 937 | } |
726f6388 | 938 | |
cce855bc JA |
939 | #if defined (JOB_CONTROL) |
940 | /* Startup files should be run without job control enabled. */ | |
941 | old_job_control = interactive_shell ? set_job_control (0) : 0; | |
942 | #endif | |
943 | ||
944 | sourced_login = 0; | |
945 | ||
bb70624e JA |
946 | /* A shell begun with the --login flag that is not in posix mode runs |
947 | the login shell startup files, no matter whether or not it is | |
948 | interactive. If NON_INTERACTIVE_LOGIN_SHELLS is defined, run the | |
949 | startup files if argv[0][0] == '-' as well. */ | |
950 | #if defined (NON_INTERACTIVE_LOGIN_SHELLS) | |
951 | if (login_shell && posixly_correct == 0) | |
952 | #else | |
953 | if (login_shell < 0 && posixly_correct == 0) | |
954 | #endif | |
cce855bc JA |
955 | { |
956 | /* We don't execute .bashrc for login shells. */ | |
957 | no_rc++; | |
958 | ||
959 | /* Execute /etc/profile and one of the personal login shell | |
960 | initialization files. */ | |
961 | if (no_profile == 0) | |
962 | { | |
963 | maybe_execute_file (SYS_PROFILE, 1); | |
964 | ||
965 | if (act_like_sh) /* sh */ | |
966 | maybe_execute_file ("~/.profile", 1); | |
967 | else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) && | |
968 | (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */ | |
969 | maybe_execute_file ("~/.profile", 1); | |
970 | } | |
971 | ||
972 | sourced_login = 1; | |
973 | } | |
cce855bc | 974 | |
ccc6cda3 JA |
975 | /* A non-interactive shell not named `sh' and not in posix mode reads and |
976 | executes commands from $BASH_ENV. If `su' starts a shell with `-c cmd' | |
977 | and `-su' as the name of the shell, we want to read the startup files. | |
978 | No other non-interactive shells read any startup files. */ | |
979 | if (interactive_shell == 0 && !(su_shell && login_shell)) | |
980 | { | |
981 | if (posixly_correct == 0 && act_like_sh == 0 && privileged_mode == 0 && | |
982 | sourced_env++ == 0) | |
983 | execute_env_file (get_string_value ("BASH_ENV")); | |
984 | return; | |
985 | } | |
726f6388 | 986 | |
ccc6cda3 JA |
987 | /* Interactive shell or `-su' shell. */ |
988 | if (posixly_correct == 0) /* bash, sh */ | |
989 | { | |
cce855bc JA |
990 | if (login_shell && sourced_login++ == 0) |
991 | { | |
992 | /* We don't execute .bashrc for login shells. */ | |
993 | no_rc++; | |
726f6388 | 994 | |
cce855bc JA |
995 | /* Execute /etc/profile and one of the personal login shell |
996 | initialization files. */ | |
997 | if (no_profile == 0) | |
998 | { | |
999 | maybe_execute_file (SYS_PROFILE, 1); | |
726f6388 | 1000 | |
cce855bc JA |
1001 | if (act_like_sh) /* sh */ |
1002 | maybe_execute_file ("~/.profile", 1); | |
1003 | else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) && | |
1004 | (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */ | |
1005 | maybe_execute_file ("~/.profile", 1); | |
1006 | } | |
1007 | } | |
726f6388 | 1008 | |
ccc6cda3 JA |
1009 | /* bash */ |
1010 | if (act_like_sh == 0 && no_rc == 0) | |
1011 | { | |
1012 | #ifdef SYS_BASHRC | |
b72432fd JA |
1013 | # if defined (__OPENNT) |
1014 | maybe_execute_file (_prefixInstallPath(SYS_BASHRC, NULL, 0), 1); | |
1015 | # else | |
ccc6cda3 | 1016 | maybe_execute_file (SYS_BASHRC, 1); |
bb70624e | 1017 | # endif |
ccc6cda3 | 1018 | #endif |
28ef6c31 | 1019 | maybe_execute_file (bashrc_file, 1); |
726f6388 | 1020 | } |
ccc6cda3 JA |
1021 | /* sh */ |
1022 | else if (act_like_sh && privileged_mode == 0 && sourced_env++ == 0) | |
28ef6c31 | 1023 | execute_env_file (get_string_value ("ENV")); |
ccc6cda3 JA |
1024 | } |
1025 | else /* bash --posix, sh --posix */ | |
1026 | { | |
1027 | /* bash and sh */ | |
1028 | if (interactive_shell && privileged_mode == 0 && sourced_env++ == 0) | |
28ef6c31 | 1029 | execute_env_file (get_string_value ("ENV")); |
726f6388 | 1030 | } |
d166f048 JA |
1031 | |
1032 | #if defined (JOB_CONTROL) | |
1033 | set_job_control (old_job_control); | |
1034 | #endif | |
726f6388 JA |
1035 | } |
1036 | ||
1037 | #if defined (RESTRICTED_SHELL) | |
b72432fd JA |
1038 | /* Return 1 if the shell should be a restricted one based on NAME or the |
1039 | value of `restricted'. Don't actually do anything, just return a | |
1040 | boolean value. */ | |
1041 | int | |
1042 | shell_is_restricted (name) | |
1043 | char *name; | |
1044 | { | |
1045 | char *temp; | |
1046 | ||
1047 | if (restricted) | |
1048 | return 1; | |
1049 | temp = base_pathname (name); | |
1050 | return (STREQ (temp, RESTRICTED_SHELL_NAME)); | |
1051 | } | |
1052 | ||
ccc6cda3 JA |
1053 | /* Perhaps make this shell a `restricted' one, based on NAME. If the |
1054 | basename of NAME is "rbash", then this shell is restricted. The | |
1055 | name of the restricted shell is a configurable option, see config.h. | |
b72432fd JA |
1056 | In a restricted shell, PATH, SHELL, ENV, and BASH_ENV are read-only |
1057 | and non-unsettable. | |
726f6388 JA |
1058 | Do this also if `restricted' is already set to 1; maybe the shell was |
1059 | started with -r. */ | |
ccc6cda3 | 1060 | int |
726f6388 JA |
1061 | maybe_make_restricted (name) |
1062 | char *name; | |
1063 | { | |
1064 | char *temp; | |
1065 | ||
1066 | temp = base_pathname (shell_name); | |
ccc6cda3 | 1067 | if (restricted || (STREQ (temp, RESTRICTED_SHELL_NAME))) |
726f6388 JA |
1068 | { |
1069 | set_var_read_only ("PATH"); | |
726f6388 | 1070 | set_var_read_only ("SHELL"); |
b72432fd JA |
1071 | set_var_read_only ("ENV"); |
1072 | set_var_read_only ("BASH_ENV"); | |
28ef6c31 | 1073 | restricted = 1; |
726f6388 | 1074 | } |
ccc6cda3 | 1075 | return (restricted); |
726f6388 JA |
1076 | } |
1077 | #endif /* RESTRICTED_SHELL */ | |
1078 | ||
ccc6cda3 JA |
1079 | /* Fetch the current set of uids and gids and return 1 if we're running |
1080 | setuid or setgid. */ | |
1081 | static int | |
1082 | uidget () | |
726f6388 | 1083 | { |
ccc6cda3 | 1084 | uid_t u; |
726f6388 | 1085 | |
ccc6cda3 JA |
1086 | u = getuid (); |
1087 | if (current_user.uid != u) | |
726f6388 | 1088 | { |
ccc6cda3 JA |
1089 | FREE (current_user.user_name); |
1090 | FREE (current_user.shell); | |
1091 | FREE (current_user.home_dir); | |
1092 | current_user.user_name = current_user.shell = current_user.home_dir = (char *)NULL; | |
726f6388 | 1093 | } |
ccc6cda3 JA |
1094 | current_user.uid = u; |
1095 | current_user.gid = getgid (); | |
1096 | current_user.euid = geteuid (); | |
1097 | current_user.egid = getegid (); | |
726f6388 | 1098 | |
ccc6cda3 JA |
1099 | /* See whether or not we are running setuid or setgid. */ |
1100 | return (current_user.uid != current_user.euid) || | |
1101 | (current_user.gid != current_user.egid); | |
1102 | } | |
726f6388 | 1103 | |
ccc6cda3 JA |
1104 | void |
1105 | disable_priv_mode () | |
1106 | { | |
1107 | setuid (current_user.uid); | |
1108 | setgid (current_user.gid); | |
1109 | current_user.euid = current_user.uid; | |
1110 | current_user.egid = current_user.gid; | |
726f6388 JA |
1111 | } |
1112 | ||
cce855bc JA |
1113 | static int |
1114 | run_wordexp (words) | |
1115 | char *words; | |
1116 | { | |
1117 | int code, nw, nb; | |
cce855bc JA |
1118 | WORD_LIST *wl, *result; |
1119 | ||
1120 | code = setjmp (top_level); | |
1121 | ||
1122 | if (code != NOT_JUMPED) | |
1123 | { | |
1124 | switch (code) | |
1125 | { | |
1126 | /* Some kind of throw to top_level has occured. */ | |
1127 | case FORCE_EOF: | |
1128 | return last_command_exit_value = 127; | |
1129 | case EXITPROG: | |
1130 | return last_command_exit_value; | |
1131 | case DISCARD: | |
1132 | return last_command_exit_value = 1; | |
1133 | default: | |
b72432fd | 1134 | command_error ("run_wordexp", CMDERR_BADJUMP, code, 0); |
cce855bc JA |
1135 | } |
1136 | } | |
1137 | ||
1138 | /* Run it through the parser to get a list of words and expand them */ | |
1139 | if (words && *words) | |
1140 | { | |
1141 | with_input_from_string (words, "--wordexp"); | |
1142 | if (parse_command () != 0) | |
28ef6c31 | 1143 | return (126); |
cce855bc JA |
1144 | if (global_command == 0) |
1145 | { | |
1146 | printf ("0\n0\n"); | |
1147 | return (0); | |
1148 | } | |
1149 | if (global_command->type != cm_simple) | |
28ef6c31 | 1150 | return (126); |
cce855bc JA |
1151 | wl = global_command->value.Simple->words; |
1152 | result = wl ? expand_words_no_vars (wl) : (WORD_LIST *)0; | |
1153 | } | |
1154 | else | |
1155 | result = (WORD_LIST *)0; | |
1156 | ||
1157 | last_command_exit_value = 0; | |
1158 | ||
1159 | if (result == 0) | |
1160 | { | |
1161 | printf ("0\n0\n"); | |
1162 | return (0); | |
1163 | } | |
1164 | ||
1165 | /* Count up the number of words and bytes, and print them. Don't count | |
1166 | the trailing NUL byte. */ | |
1167 | for (nw = nb = 0, wl = result; wl; wl = wl->next) | |
1168 | { | |
1169 | nw++; | |
1170 | nb += strlen (wl->word->word); | |
1171 | } | |
1172 | printf ("%u\n%u\n", nw, nb); | |
1173 | /* Print each word on a separate line. This will have to be changed when | |
1174 | the interface to glibc is completed. */ | |
1175 | for (wl = result; wl; wl = wl->next) | |
1176 | printf ("%s\n", wl->word->word); | |
1177 | ||
1178 | return (0); | |
1179 | } | |
1180 | ||
726f6388 JA |
1181 | #if defined (ONESHOT) |
1182 | /* Run one command, given as the argument to the -c option. Tell | |
1183 | parse_and_execute not to fork for a simple command. */ | |
ccc6cda3 | 1184 | static int |
726f6388 JA |
1185 | run_one_command (command) |
1186 | char *command; | |
1187 | { | |
1188 | int code; | |
1189 | ||
1190 | code = setjmp (top_level); | |
1191 | ||
1192 | if (code != NOT_JUMPED) | |
1193 | { | |
1194 | #if defined (PROCESS_SUBSTITUTION) | |
1195 | unlink_fifo_list (); | |
1196 | #endif /* PROCESS_SUBSTITUTION */ | |
1197 | switch (code) | |
1198 | { | |
1199 | /* Some kind of throw to top_level has occured. */ | |
1200 | case FORCE_EOF: | |
1201 | return last_command_exit_value = 127; | |
1202 | case EXITPROG: | |
1203 | return last_command_exit_value; | |
1204 | case DISCARD: | |
1205 | return last_command_exit_value = 1; | |
1206 | default: | |
b72432fd | 1207 | command_error ("run_one_command", CMDERR_BADJUMP, code, 0); |
726f6388 JA |
1208 | } |
1209 | } | |
d166f048 | 1210 | return (parse_and_execute (savestring (command), "-c", SEVAL_NOHIST)); |
726f6388 JA |
1211 | } |
1212 | #endif /* ONESHOT */ | |
1213 | ||
ccc6cda3 JA |
1214 | static int |
1215 | bind_args (argv, arg_start, arg_end, start_index) | |
1216 | char **argv; | |
1217 | int arg_start, arg_end, start_index; | |
726f6388 | 1218 | { |
ccc6cda3 JA |
1219 | register int i; |
1220 | WORD_LIST *args; | |
726f6388 | 1221 | |
ccc6cda3 JA |
1222 | for (i = arg_start, args = (WORD_LIST *)NULL; i != arg_end; i++) |
1223 | args = make_word_list (make_word (argv[i]), args); | |
1224 | if (args) | |
726f6388 | 1225 | { |
ccc6cda3 JA |
1226 | args = REVERSE_LIST (args, WORD_LIST *); |
1227 | if (start_index == 0) /* bind to $0...$n for sh -c command */ | |
726f6388 | 1228 | { |
ccc6cda3 JA |
1229 | /* Posix.2 4.56.3 says that the first argument after sh -c command |
1230 | becomes $0, and the rest of the arguments become $1...$n */ | |
1231 | shell_name = savestring (args->word->word); | |
d166f048 | 1232 | FREE (dollar_vars[0]); |
ccc6cda3 JA |
1233 | dollar_vars[0] = savestring (args->word->word); |
1234 | remember_args (args->next, 1); | |
726f6388 | 1235 | } |
ccc6cda3 | 1236 | else /* bind to $1...$n for shell script */ |
28ef6c31 | 1237 | remember_args (args, 1); |
726f6388 | 1238 | |
ccc6cda3 JA |
1239 | dispose_words (args); |
1240 | } | |
726f6388 | 1241 | |
ccc6cda3 JA |
1242 | return (i); |
1243 | } | |
726f6388 | 1244 | |
ccc6cda3 JA |
1245 | void |
1246 | unbind_args () | |
1247 | { | |
1248 | remember_args ((WORD_LIST *)NULL, 1); | |
1249 | } | |
726f6388 | 1250 | |
ccc6cda3 JA |
1251 | static int |
1252 | open_shell_script (script_name) | |
1253 | char *script_name; | |
1254 | { | |
28ef6c31 | 1255 | int fd, e, fd_is_tty; |
ccc6cda3 | 1256 | char *filename, *path_filename; |
f73dda09 | 1257 | char sample[80]; |
ccc6cda3 | 1258 | int sample_len; |
d166f048 | 1259 | struct stat sb; |
726f6388 | 1260 | |
ccc6cda3 JA |
1261 | free (dollar_vars[0]); |
1262 | dollar_vars[0] = savestring (script_name); | |
1263 | filename = savestring (script_name); | |
726f6388 | 1264 | |
ccc6cda3 JA |
1265 | fd = open (filename, O_RDONLY); |
1266 | if ((fd < 0) && (errno == ENOENT) && (absolute_program (filename) == 0)) | |
1267 | { | |
d166f048 | 1268 | e = errno; |
ccc6cda3 JA |
1269 | /* If it's not in the current directory, try looking through PATH |
1270 | for it. */ | |
1271 | path_filename = find_path_file (script_name); | |
1272 | if (path_filename) | |
726f6388 | 1273 | { |
ccc6cda3 JA |
1274 | free (filename); |
1275 | filename = path_filename; | |
1276 | fd = open (filename, O_RDONLY); | |
726f6388 | 1277 | } |
d166f048 JA |
1278 | else |
1279 | errno = e; | |
726f6388 | 1280 | } |
726f6388 | 1281 | |
ccc6cda3 JA |
1282 | if (fd < 0) |
1283 | { | |
d166f048 | 1284 | e = errno; |
ccc6cda3 JA |
1285 | file_error (filename); |
1286 | exit ((e == ENOENT) ? EX_NOTFOUND : EX_NOINPUT); | |
1287 | } | |
726f6388 | 1288 | |
28ef6c31 JA |
1289 | #ifdef HAVE_DEV_FD |
1290 | fd_is_tty = isatty (fd); | |
1291 | #else | |
1292 | fd_is_tty = 0; | |
1293 | #endif | |
1294 | ||
1295 | /* Only do this with non-tty file descriptors we can seek on. */ | |
1296 | if (fd_is_tty == 0 && (lseek (fd, 0L, 1) != -1)) | |
ccc6cda3 JA |
1297 | { |
1298 | /* Check to see if the `file' in `bash file' is a binary file | |
1299 | according to the same tests done by execute_simple_command (), | |
1300 | and report an error and exit if it is. */ | |
1301 | sample_len = read (fd, sample, sizeof (sample)); | |
d166f048 JA |
1302 | if (sample_len < 0) |
1303 | { | |
1304 | e = errno; | |
1305 | if ((fstat (fd, &sb) == 0) && S_ISDIR (sb.st_mode)) | |
1306 | internal_error ("%s: is a directory", filename); | |
28ef6c31 | 1307 | else |
d166f048 JA |
1308 | { |
1309 | errno = e; | |
1310 | file_error (filename); | |
1311 | } | |
1312 | exit (EX_NOEXEC); | |
1313 | } | |
1314 | else if (sample_len > 0 && (check_binary_file (sample, sample_len))) | |
ccc6cda3 JA |
1315 | { |
1316 | internal_error ("%s: cannot execute binary file", filename); | |
1317 | exit (EX_BINARY_FILE); | |
1318 | } | |
1319 | /* Now rewind the file back to the beginning. */ | |
1320 | lseek (fd, 0L, 0); | |
1321 | } | |
726f6388 | 1322 | |
bb70624e JA |
1323 | /* Open the script. But try to move the file descriptor to a randomly |
1324 | large one, in the hopes that any descriptors used by the script will | |
1325 | not match with ours. */ | |
1326 | fd = move_to_high_fd (fd, 0, -1); | |
1327 | ||
28ef6c31 JA |
1328 | #if defined (__CYGWIN__) && defined (O_TEXT) |
1329 | setmode (fd, O_TEXT); | |
1330 | #endif | |
1331 | ||
ccc6cda3 JA |
1332 | #if defined (BUFFERED_INPUT) |
1333 | default_buffered_input = fd; | |
ccc6cda3 JA |
1334 | SET_CLOSE_ON_EXEC (default_buffered_input); |
1335 | #else /* !BUFFERED_INPUT */ | |
ccc6cda3 | 1336 | default_input = fdopen (fd, "r"); |
726f6388 | 1337 | |
ccc6cda3 JA |
1338 | if (default_input == 0) |
1339 | { | |
1340 | file_error (filename); | |
1341 | exit (EX_NOTFOUND); | |
1342 | } | |
726f6388 | 1343 | |
ccc6cda3 JA |
1344 | SET_CLOSE_ON_EXEC (fd); |
1345 | if (fileno (default_input) != fd) | |
1346 | SET_CLOSE_ON_EXEC (fileno (default_input)); | |
1347 | #endif /* !BUFFERED_INPUT */ | |
726f6388 | 1348 | |
28ef6c31 JA |
1349 | /* Just about the only way for this code to be executed is if something |
1350 | like `bash -i /dev/stdin' is executed. */ | |
1351 | if (interactive_shell && fd_is_tty) | |
ccc6cda3 | 1352 | { |
ccc6cda3 JA |
1353 | dup2 (fd, 0); |
1354 | close (fd); | |
1355 | fd = 0; | |
1356 | #if defined (BUFFERED_INPUT) | |
1357 | default_buffered_input = 0; | |
1358 | #else | |
1359 | fclose (default_input); | |
1360 | default_input = stdin; | |
1361 | #endif | |
1362 | } | |
f73dda09 JA |
1363 | else if (forced_interactive && fd_is_tty == 0) |
1364 | /* But if a script is called with something like `bash -i scriptname', | |
1365 | we need to do a non-interactive setup here, since we didn't do it | |
1366 | before. */ | |
1367 | init_noninteractive (); | |
28ef6c31 | 1368 | |
ccc6cda3 JA |
1369 | free (filename); |
1370 | return (fd); | |
726f6388 JA |
1371 | } |
1372 | ||
ccc6cda3 JA |
1373 | /* Initialize the input routines for the parser. */ |
1374 | static void | |
1375 | set_bash_input () | |
726f6388 | 1376 | { |
ccc6cda3 JA |
1377 | /* Make sure the fd from which we are reading input is not in |
1378 | no-delay mode. */ | |
1379 | #if defined (BUFFERED_INPUT) | |
1380 | if (interactive == 0) | |
28ef6c31 | 1381 | sh_unset_nodelay_mode (default_buffered_input); |
ccc6cda3 JA |
1382 | else |
1383 | #endif /* !BUFFERED_INPUT */ | |
28ef6c31 | 1384 | sh_unset_nodelay_mode (fileno (stdin)); |
726f6388 | 1385 | |
ccc6cda3 JA |
1386 | /* with_input_from_stdin really means `with_input_from_readline' */ |
1387 | if (interactive && no_line_editing == 0) | |
1388 | with_input_from_stdin (); | |
1389 | else | |
1390 | #if defined (BUFFERED_INPUT) | |
726f6388 | 1391 | { |
ccc6cda3 JA |
1392 | if (interactive == 0) |
1393 | with_input_from_buffered_stream (default_buffered_input, dollar_vars[0]); | |
1394 | else | |
1395 | with_input_from_stream (default_input, dollar_vars[0]); | |
726f6388 | 1396 | } |
ccc6cda3 JA |
1397 | #else /* !BUFFERED_INPUT */ |
1398 | with_input_from_stream (default_input, dollar_vars[0]); | |
1399 | #endif /* !BUFFERED_INPUT */ | |
726f6388 JA |
1400 | } |
1401 | ||
cce855bc JA |
1402 | /* Close the current shell script input source and forget about it. This is |
1403 | extern so execute_cmd.c:initialize_subshell() can call it. If CHECK_ZERO | |
1404 | is non-zero, we close default_buffered_input even if it's the standard | |
1405 | input (fd 0). */ | |
1406 | void | |
1407 | unset_bash_input (check_zero) | |
1408 | int check_zero; | |
1409 | { | |
1410 | #if defined (BUFFERED_INPUT) | |
1411 | if ((check_zero && default_buffered_input >= 0) || | |
1412 | (check_zero == 0 && default_buffered_input > 0)) | |
1413 | { | |
1414 | close_buffered_fd (default_buffered_input); | |
1415 | default_buffered_input = bash_input.location.buffered_fd = -1; | |
1416 | } | |
1417 | #else /* !BUFFERED_INPUT */ | |
1418 | if (default_input) | |
1419 | { | |
1420 | fclose (default_input); | |
1421 | default_input = (FILE *)NULL; | |
1422 | } | |
1423 | #endif /* !BUFFERED_INPUT */ | |
1424 | } | |
1425 | ||
1426 | ||
ccc6cda3 JA |
1427 | #if !defined (PROGRAM) |
1428 | # define PROGRAM "bash" | |
1429 | #endif | |
1430 | ||
1431 | static void | |
1432 | set_shell_name (argv0) | |
1433 | char *argv0; | |
726f6388 | 1434 | { |
ccc6cda3 JA |
1435 | /* Here's a hack. If the name of this shell is "sh", then don't do |
1436 | any startup files; just try to be more like /bin/sh. */ | |
1437 | shell_name = base_pathname (argv0); | |
1438 | if (*shell_name == '-') | |
1439 | shell_name++; | |
1440 | if (shell_name[0] == 's' && shell_name[1] == 'h' && shell_name[2] == '\0') | |
1441 | act_like_sh++; | |
1442 | if (shell_name[0] == 's' && shell_name[1] == 'u' && shell_name[2] == '\0') | |
1443 | su_shell++; | |
726f6388 | 1444 | |
ccc6cda3 JA |
1445 | shell_name = argv0; |
1446 | FREE (dollar_vars[0]); | |
1447 | dollar_vars[0] = savestring (shell_name); | |
726f6388 | 1448 | |
ccc6cda3 | 1449 | if (*shell_name == '-') |
726f6388 | 1450 | { |
ccc6cda3 JA |
1451 | shell_name++; |
1452 | login_shell++; | |
726f6388 JA |
1453 | } |
1454 | ||
ccc6cda3 JA |
1455 | /* A program may start an interactive shell with |
1456 | "execl ("/bin/bash", "-", NULL)". | |
1457 | If so, default the name of this shell to our name. */ | |
1458 | if (!shell_name || !*shell_name || (shell_name[0] == '-' && !shell_name[1])) | |
1459 | shell_name = PROGRAM; | |
1460 | } | |
726f6388 | 1461 | |
ccc6cda3 JA |
1462 | static void |
1463 | init_interactive () | |
1464 | { | |
1465 | interactive_shell = startup_state = interactive = 1; | |
1466 | expand_aliases = 1; | |
726f6388 JA |
1467 | } |
1468 | ||
726f6388 | 1469 | static void |
ccc6cda3 | 1470 | init_noninteractive () |
726f6388 | 1471 | { |
ccc6cda3 JA |
1472 | #if defined (HISTORY) |
1473 | bash_history_reinit (0); | |
1474 | #endif /* HISTORY */ | |
1475 | interactive_shell = startup_state = interactive = 0; | |
1476 | expand_aliases = 0; | |
1477 | no_line_editing = 1; | |
1478 | #if defined (JOB_CONTROL) | |
1479 | set_job_control (0); | |
1480 | #endif /* JOB_CONTROL */ | |
726f6388 JA |
1481 | } |
1482 | ||
d166f048 JA |
1483 | void |
1484 | get_current_user_info () | |
1485 | { | |
1486 | struct passwd *entry; | |
1487 | ||
1488 | /* Don't fetch this more than once. */ | |
1489 | if (current_user.user_name == 0) | |
1490 | { | |
1491 | entry = getpwuid (current_user.uid); | |
1492 | if (entry) | |
1493 | { | |
1494 | current_user.user_name = savestring (entry->pw_name); | |
1495 | current_user.shell = (entry->pw_shell && entry->pw_shell[0]) | |
1496 | ? savestring (entry->pw_shell) | |
1497 | : savestring ("/bin/sh"); | |
1498 | current_user.home_dir = savestring (entry->pw_dir); | |
1499 | } | |
1500 | else | |
1501 | { | |
1502 | current_user.user_name = savestring ("I have no name!"); | |
1503 | current_user.shell = savestring ("/bin/sh"); | |
1504 | current_user.home_dir = savestring ("/"); | |
1505 | } | |
1506 | endpwent (); | |
1507 | } | |
1508 | } | |
1509 | ||
726f6388 JA |
1510 | /* Do whatever is necessary to initialize the shell. |
1511 | Put new initializations in here. */ | |
1512 | static void | |
1513 | shell_initialize () | |
1514 | { | |
ccc6cda3 JA |
1515 | char hostname[256]; |
1516 | ||
726f6388 | 1517 | /* Line buffer output for stderr and stdout. */ |
cce855bc | 1518 | if (shell_initialized == 0) |
cce855bc | 1519 | { |
bb70624e JA |
1520 | sh_setlinebuf (stderr); |
1521 | sh_setlinebuf (stdout); | |
cce855bc | 1522 | } |
726f6388 JA |
1523 | |
1524 | /* Sort the array of shell builtins so that the binary search in | |
1525 | find_shell_builtin () works correctly. */ | |
1526 | initialize_shell_builtins (); | |
1527 | ||
1528 | /* Initialize the trap signal handlers before installing our own | |
1529 | signal handlers. traps.c:restore_original_signals () is responsible | |
1530 | for restoring the original default signal handlers. That function | |
1531 | is called when we make a new child. */ | |
1532 | initialize_traps (); | |
1533 | initialize_signals (); | |
1534 | ||
ccc6cda3 JA |
1535 | /* It's highly unlikely that this will change. */ |
1536 | if (current_host_name == 0) | |
1537 | { | |
d166f048 | 1538 | /* Initialize current_host_name. */ |
ccc6cda3 JA |
1539 | if (gethostname (hostname, 255) < 0) |
1540 | current_host_name = "??host??"; | |
1541 | else | |
1542 | current_host_name = savestring (hostname); | |
1543 | } | |
1544 | ||
d166f048 JA |
1545 | /* Initialize the stuff in current_user that comes from the password |
1546 | file. We don't need to do this right away if the shell is not | |
1547 | interactive. */ | |
1548 | if (interactive_shell) | |
1549 | get_current_user_info (); | |
726f6388 JA |
1550 | |
1551 | /* Initialize our interface to the tilde expander. */ | |
1552 | tilde_initialize (); | |
1553 | ||
ccc6cda3 JA |
1554 | /* Initialize internal and environment variables. Don't import shell |
1555 | functions from the environment if we are running in privileged or | |
1556 | restricted mode or if the shell is running setuid. */ | |
1557 | #if defined (RESTRICTED_SHELL) | |
1558 | initialize_shell_variables (shell_environment, privileged_mode||restricted||running_setuid); | |
1559 | #else | |
1560 | initialize_shell_variables (shell_environment, privileged_mode||running_setuid); | |
1561 | #endif | |
726f6388 | 1562 | |
d166f048 | 1563 | #if 0 |
726f6388 JA |
1564 | /* Initialize filename hash tables. */ |
1565 | initialize_filename_hashing (); | |
d166f048 | 1566 | #endif |
726f6388 JA |
1567 | |
1568 | /* Initialize the data structures for storing and running jobs. */ | |
d166f048 | 1569 | initialize_job_control (0); |
726f6388 JA |
1570 | |
1571 | /* Initialize input streams to null. */ | |
1572 | initialize_bash_input (); | |
ccc6cda3 | 1573 | |
cce855bc JA |
1574 | /* Initialize the shell options. Don't import the shell options |
1575 | from the environment variable $SHELLOPTS if we are running in | |
1576 | privileged or restricted mode or if the shell is running setuid. */ | |
1577 | #if defined (RESTRICTED_SHELL) | |
1578 | initialize_shell_options (privileged_mode||restricted||running_setuid); | |
1579 | #else | |
1580 | initialize_shell_options (privileged_mode||running_setuid); | |
1581 | #endif | |
726f6388 JA |
1582 | } |
1583 | ||
1584 | /* Function called by main () when it appears that the shell has already | |
1585 | had some initialization performed. This is supposed to reset the world | |
1586 | back to a pristine state, as if we had been exec'ed. */ | |
1587 | static void | |
1588 | shell_reinitialize () | |
1589 | { | |
1590 | /* The default shell prompts. */ | |
1591 | primary_prompt = PPROMPT; | |
1592 | secondary_prompt = SPROMPT; | |
1593 | ||
1594 | /* Things that get 1. */ | |
1595 | current_command_number = 1; | |
1596 | ||
1597 | /* We have decided that the ~/.bashrc file should not be executed | |
1598 | for the invocation of each shell script. If the variable $ENV | |
1599 | (or $BASH_ENV) is set, its value is used as the name of a file | |
1600 | to source. */ | |
1601 | no_rc = no_profile = 1; | |
1602 | ||
1603 | /* Things that get 0. */ | |
1604 | login_shell = make_login_shell = interactive = executing = 0; | |
1605 | debugging = do_version = line_number = last_command_exit_value = 0; | |
1606 | forced_interactive = interactive_shell = subshell_environment = 0; | |
ccc6cda3 | 1607 | expand_aliases = 0; |
726f6388 JA |
1608 | |
1609 | #if defined (HISTORY) | |
ccc6cda3 | 1610 | bash_history_reinit (0); |
726f6388 JA |
1611 | #endif /* HISTORY */ |
1612 | ||
1613 | #if defined (RESTRICTED_SHELL) | |
1614 | restricted = 0; | |
1615 | #endif /* RESTRICTED_SHELL */ | |
1616 | ||
1617 | /* Ensure that the default startup file is used. (Except that we don't | |
1618 | execute this file for reinitialized shells). */ | |
1619 | bashrc_file = "~/.bashrc"; | |
1620 | ||
1621 | /* Delete all variables and functions. They will be reinitialized when | |
1622 | the environment is parsed. */ | |
726f6388 JA |
1623 | delete_all_variables (shell_variables); |
1624 | delete_all_variables (shell_functions); | |
1625 | ||
28ef6c31 | 1626 | shell_reinitialized = 1; |
726f6388 JA |
1627 | } |
1628 | ||
726f6388 | 1629 | static void |
d166f048 | 1630 | show_shell_usage (fp, extra) |
ccc6cda3 | 1631 | FILE *fp; |
d166f048 | 1632 | int extra; |
726f6388 | 1633 | { |
ccc6cda3 JA |
1634 | int i; |
1635 | char *set_opts, *s, *t; | |
1636 | ||
d166f048 JA |
1637 | if (extra) |
1638 | fprintf (fp, "GNU bash, version %s-(%s)\n", shell_version_string (), MACHTYPE); | |
ccc6cda3 JA |
1639 | fprintf (fp, "Usage:\t%s [GNU long option] [option] ...\n\t%s [GNU long option] [option] script-file ...\n", |
1640 | shell_name, shell_name); | |
1641 | fputs ("GNU long options:\n", fp); | |
1642 | for (i = 0; long_args[i].name; i++) | |
1643 | fprintf (fp, "\t--%s\n", long_args[i].name); | |
1644 | ||
1645 | fputs ("Shell options:\n", fp); | |
f73dda09 | 1646 | fputs ("\t-irsD or -c command or -O shopt_option\t\t(invocation only)\n", fp); |
ccc6cda3 JA |
1647 | |
1648 | for (i = 0, set_opts = 0; shell_builtins[i].name; i++) | |
1649 | if (STREQ (shell_builtins[i].name, "set")) | |
1650 | set_opts = savestring (shell_builtins[i].short_doc); | |
1651 | if (set_opts) | |
726f6388 | 1652 | { |
ccc6cda3 JA |
1653 | s = strchr (set_opts, '['); |
1654 | if (s == 0) | |
1655 | s = set_opts; | |
1656 | while (*++s == '-') | |
1657 | ; | |
1658 | t = strchr (s, ']'); | |
1659 | if (t) | |
1660 | *t = '\0'; | |
1661 | fprintf (fp, "\t-%s or -o option\n", s); | |
1662 | free (set_opts); | |
726f6388 JA |
1663 | } |
1664 | ||
d166f048 JA |
1665 | if (extra) |
1666 | { | |
1667 | fprintf (fp, "Type `%s -c \"help set\"' for more information about shell options.\n", shell_name); | |
1668 | fprintf (fp, "Type `%s -c help' for more information about shell builtin commands.\n", shell_name); | |
1669 | fprintf (fp, "Use the `bashbug' command to report bugs.\n"); | |
1670 | } | |
726f6388 JA |
1671 | } |
1672 | ||
f73dda09 JA |
1673 | static void |
1674 | add_shopt_to_alist (opt, on_or_off) | |
1675 | char *opt; | |
1676 | int on_or_off; | |
1677 | { | |
1678 | if (shopt_ind >= shopt_len) | |
1679 | { | |
1680 | shopt_len += 8; | |
1681 | shopt_alist = (STRING_INT_ALIST *)xrealloc (shopt_alist, shopt_len * sizeof (shopt_alist[0])); | |
1682 | } | |
1683 | shopt_alist[shopt_ind].word = opt; | |
1684 | shopt_alist[shopt_ind].token = on_or_off; | |
1685 | shopt_ind++; | |
1686 | } | |
1687 | ||
1688 | static void | |
1689 | run_shopt_alist () | |
1690 | { | |
1691 | register int i; | |
1692 | ||
1693 | for (i = 0; i < shopt_ind; i++) | |
1694 | if (shopt_setopt (shopt_alist[i].word, (shopt_alist[i].token == '-')) != EXECUTION_SUCCESS) | |
1695 | exit (EX_USAGE); | |
1696 | free (shopt_alist); | |
1697 | shopt_alist = 0; | |
1698 | shopt_ind = shopt_len = 0; | |
1699 | } | |
1700 | ||
ccc6cda3 JA |
1701 | /* The second and subsequent conditions must match those used to decide |
1702 | whether or not to call getpeername() in isnetconn(). */ | |
1703 | #if defined (HAVE_SYS_SOCKET_H) && defined (HAVE_GETPEERNAME) && !defined (SVR4_2) | |
1704 | # include <sys/socket.h> | |
726f6388 JA |
1705 | #endif |
1706 | ||
1707 | /* Is FD a socket or network connection? */ | |
1708 | static int | |
1709 | isnetconn (fd) | |
1710 | int fd; | |
1711 | { | |
b72432fd | 1712 | #if defined (HAVE_GETPEERNAME) && !defined (SVR4_2) && !defined (__BEOS__) |
f73dda09 JA |
1713 | int rv; |
1714 | socklen_t l; | |
ccc6cda3 JA |
1715 | struct sockaddr sa; |
1716 | ||
1717 | l = sizeof(sa); | |
cce855bc | 1718 | rv = getpeername(fd, &sa, &l); |
ccc6cda3 JA |
1719 | /* Solaris 2.5 getpeername() returns EINVAL if the fd is not a socket. */ |
1720 | return ((rv < 0 && (errno == ENOTSOCK || errno == EINVAL)) ? 0 : 1); | |
b72432fd | 1721 | #else /* !HAVE_GETPEERNAME || SVR4_2 || __BEOS__ */ |
ccc6cda3 | 1722 | # if defined (SVR4) || defined (SVR4_2) |
726f6388 JA |
1723 | /* Sockets on SVR4 and SVR4.2 are character special (streams) devices. */ |
1724 | struct stat sb; | |
1725 | ||
ccc6cda3 JA |
1726 | if (isatty (fd)) |
1727 | return (0); | |
726f6388 JA |
1728 | if (fstat (fd, &sb) < 0) |
1729 | return (0); | |
ccc6cda3 JA |
1730 | # if defined (S_ISFIFO) |
1731 | if (S_ISFIFO (sb.st_mode)) | |
1732 | return (0); | |
1733 | # endif /* S_ISFIFO */ | |
726f6388 | 1734 | return (S_ISCHR (sb.st_mode)); |
ccc6cda3 | 1735 | # else /* !SVR4 && !SVR4_2 */ |
b72432fd | 1736 | # if defined (S_ISSOCK) && !defined (__BEOS__) |
726f6388 JA |
1737 | struct stat sb; |
1738 | ||
1739 | if (fstat (fd, &sb) < 0) | |
1740 | return (0); | |
1741 | return (S_ISSOCK (sb.st_mode)); | |
b72432fd | 1742 | # else /* !S_ISSOCK || __BEOS__ */ |
726f6388 | 1743 | return (0); |
b72432fd | 1744 | # endif /* !S_ISSOCK || __BEOS__ */ |
ccc6cda3 | 1745 | # endif /* !SVR4 && !SVR4_2 */ |
b72432fd | 1746 | #endif /* !HAVE_GETPEERNAME || SVR4_2 || __BEOS__ */ |
726f6388 | 1747 | } |