Commit | Line | Data |
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f927c5ae | 1 | /* Fully extensible Emacs, running on Unix, intended for GNU. |
be06db9a | 2 | Copyright (C) 1985, 1986, 1987, 1993, 1994 Free Software Foundation, Inc. |
f927c5ae JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
40be253a | 8 | the Free Software Foundation; either version 2, or (at your option) |
f927c5ae JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include <signal.h> | |
22 | #include <errno.h> | |
23 | ||
18160b98 | 24 | #include <config.h> |
f927c5ae JB |
25 | #include <stdio.h> |
26 | ||
27 | #include <sys/types.h> | |
28 | #include <sys/file.h> | |
29 | ||
30 | #ifdef VMS | |
31 | #include <ssdef.h> | |
32 | #endif | |
33 | ||
f927c5ae JB |
34 | #ifdef BSD |
35 | #include <sys/ioctl.h> | |
36 | #endif | |
37 | ||
38 | #ifdef APOLLO | |
39 | #ifndef APOLLO_SR10 | |
40 | #include <default_acl.h> | |
41 | #endif | |
42 | #endif | |
43 | ||
f927c5ae JB |
44 | #include "lisp.h" |
45 | #include "commands.h" | |
bef79ee4 | 46 | #include "intervals.h" |
f927c5ae | 47 | |
edc8ae07 | 48 | #include "systty.h" |
8090eb09 | 49 | #include "syssignal.h" |
6c362a8b | 50 | #include "process.h" |
a41f8bed | 51 | |
f927c5ae JB |
52 | #ifndef O_RDWR |
53 | #define O_RDWR 2 | |
54 | #endif | |
55 | ||
43165242 KH |
56 | extern void malloc_warning (); |
57 | extern char *index (); | |
58 | extern char *strerror (); | |
59 | ||
f927c5ae JB |
60 | /* Command line args from shell, as list of strings */ |
61 | Lisp_Object Vcommand_line_args; | |
62 | ||
59653951 JB |
63 | /* The name under which Emacs was invoked, with any leading directory |
64 | names discarded. */ | |
65 | Lisp_Object Vinvocation_name; | |
66 | ||
ace40a69 RS |
67 | /* The directory name from which Emacs was invoked. */ |
68 | Lisp_Object Vinvocation_directory; | |
69 | ||
07f4d123 RS |
70 | /* The directory name in which to find subdirs such as lisp and etc. |
71 | nil means get them only from PATH_LOADSEARCH. */ | |
72 | Lisp_Object Vinstallation_directory; | |
73 | ||
e5d77022 JB |
74 | /* Hook run by `kill-emacs' before it does really anything. */ |
75 | Lisp_Object Vkill_emacs_hook; | |
76 | ||
f927c5ae JB |
77 | /* Set nonzero after Emacs has started up the first time. |
78 | Prevents reinitialization of the Lisp world and keymaps | |
79 | on subsequent starts. */ | |
80 | int initialized; | |
81 | ||
271c7b7c | 82 | /* Variable whose value is symbol giving operating system type. */ |
f927c5ae | 83 | Lisp_Object Vsystem_type; |
271c7b7c RS |
84 | |
85 | /* Variable whose value is string giving configuration built for. */ | |
86 | Lisp_Object Vsystem_configuration; | |
f927c5ae JB |
87 | |
88 | /* If non-zero, emacs should not attempt to use an window-specific code, | |
89 | but instead should use the virtual terminal under which it was started */ | |
90 | int inhibit_window_system; | |
91 | ||
5aa7f46a JB |
92 | /* If nonzero, set Emacs to run at this priority. This is also used |
93 | in child_setup and sys_suspend to make sure subshells run at normal | |
94 | priority; Those functions have their own extern declaration. */ | |
3005da00 RS |
95 | int emacs_priority; |
96 | ||
9ae8f997 JB |
97 | #ifdef BSD |
98 | /* See sysdep.c. */ | |
99 | extern int inherited_pgroup; | |
100 | #endif | |
101 | ||
f927c5ae JB |
102 | #ifdef HAVE_X_WINDOWS |
103 | /* If non-zero, -d was specified, meaning we're using some window system. */ | |
104 | int display_arg; | |
105 | #endif | |
106 | ||
107 | /* An address near the bottom of the stack. | |
108 | Tells GC how to save a copy of the stack. */ | |
109 | char *stack_bottom; | |
110 | ||
111 | #ifdef HAVE_X_WINDOWS | |
112 | extern Lisp_Object Vwindow_system; | |
113 | #endif /* HAVE_X_WINDOWS */ | |
114 | ||
115 | #ifdef USG_SHARED_LIBRARIES | |
116 | /* If nonzero, this is the place to put the end of the writable segment | |
117 | at startup. */ | |
118 | ||
119 | unsigned int bss_end = 0; | |
120 | #endif | |
121 | ||
122 | /* Nonzero means running Emacs without interactive terminal. */ | |
123 | ||
124 | int noninteractive; | |
125 | ||
126 | /* Value of Lisp variable `noninteractive'. | |
127 | Normally same as C variable `noninteractive' | |
128 | but nothing terrible happens if user sets this one. */ | |
129 | ||
130 | int noninteractive1; | |
131 | \f | |
132 | /* Signal code for the fatal signal that was received */ | |
133 | int fatal_error_code; | |
134 | ||
135 | /* Nonzero if handling a fatal error already */ | |
136 | int fatal_error_in_progress; | |
137 | ||
138 | /* Handle bus errors, illegal instruction, etc. */ | |
2447c626 | 139 | SIGTYPE |
f927c5ae JB |
140 | fatal_error_signal (sig) |
141 | int sig; | |
142 | { | |
f927c5ae JB |
143 | fatal_error_code = sig; |
144 | signal (sig, SIG_DFL); | |
145 | ||
146 | /* If fatal error occurs in code below, avoid infinite recursion. */ | |
8090eb09 JB |
147 | if (! fatal_error_in_progress) |
148 | { | |
149 | fatal_error_in_progress = 1; | |
f927c5ae | 150 | |
f7ab4e3d | 151 | shut_down_emacs (sig, 0, Qnil); |
8090eb09 | 152 | } |
f927c5ae JB |
153 | |
154 | #ifdef VMS | |
f927c5ae JB |
155 | LIB$STOP (SS$_ABORT); |
156 | #else | |
8090eb09 JB |
157 | /* Signal the same code; this time it will really be fatal. |
158 | Remember that since we're in a signal handler, the signal we're | |
159 | going to send is probably blocked, so we have to unblock it if we | |
160 | want to really receive it. */ | |
29b89fe0 | 161 | #ifndef MSDOS |
a90538cb | 162 | sigunblock (sigmask (fatal_error_code)); |
29b89fe0 | 163 | #endif |
f927c5ae JB |
164 | kill (getpid (), fatal_error_code); |
165 | #endif /* not VMS */ | |
166 | } | |
271c7b7c RS |
167 | |
168 | #ifdef SIGDANGER | |
169 | ||
16c323ee | 170 | /* Handler for SIGDANGER. */ |
271c7b7c RS |
171 | SIGTYPE |
172 | memory_warning_signal (sig) | |
173 | int sig; | |
174 | { | |
175 | signal (sig, memory_warning_signal); | |
176 | ||
177 | malloc_warning ("Operating system warns that virtual memory is running low.\n"); | |
178 | } | |
179 | #endif | |
f927c5ae JB |
180 | \f |
181 | /* Code for dealing with Lisp access to the Unix command line */ | |
182 | ||
183 | static | |
184 | init_cmdargs (argc, argv, skip_args) | |
185 | int argc; | |
186 | char **argv; | |
187 | int skip_args; | |
188 | { | |
189 | register int i; | |
07f4d123 | 190 | Lisp_Object name, dir; |
f927c5ae | 191 | |
cb421be8 | 192 | Vinvocation_name = Ffile_name_nondirectory (build_string (argv[0])); |
ace40a69 RS |
193 | Vinvocation_directory = Ffile_name_directory (build_string (argv[0])); |
194 | /* If we got no directory in argv[0], search PATH to find where | |
195 | Emacs actually came from. */ | |
196 | if (NILP (Vinvocation_directory)) | |
197 | { | |
198 | Lisp_Object found; | |
199 | int yes = openp (Vexec_path, Vinvocation_name, | |
6c362a8b | 200 | EXEC_SUFFIXES, &found, 1); |
e443f843 | 201 | if (yes == 1) |
ace40a69 RS |
202 | Vinvocation_directory = Ffile_name_directory (found); |
203 | } | |
59653951 | 204 | |
07f4d123 RS |
205 | Vinstallation_directory = Qnil; |
206 | ||
207 | if (!NILP (Vinvocation_directory)) | |
208 | { | |
209 | dir = Vinvocation_directory; | |
210 | name = Fexpand_file_name (Vinvocation_name, dir); | |
211 | while (1) | |
212 | { | |
213 | Lisp_Object tem, lisp_exists, lib_src_exists; | |
214 | Lisp_Object etc_exists, info_exists; | |
215 | ||
216 | /* See if dir contains subdirs for use by Emacs. */ | |
217 | tem = Fexpand_file_name (build_string ("lisp"), dir); | |
218 | lisp_exists = Ffile_exists_p (tem); | |
219 | if (!NILP (lisp_exists)) | |
220 | { | |
221 | tem = Fexpand_file_name (build_string ("lib-src"), dir); | |
222 | lib_src_exists = Ffile_exists_p (tem); | |
223 | if (!NILP (lib_src_exists)) | |
224 | { | |
225 | tem = Fexpand_file_name (build_string ("etc"), dir); | |
226 | etc_exists = Ffile_exists_p (tem); | |
227 | if (!NILP (etc_exists)) | |
228 | { | |
229 | tem = Fexpand_file_name (build_string ("info"), dir); | |
230 | info_exists = Ffile_exists_p (tem); | |
231 | if (!NILP (info_exists)) | |
232 | { | |
233 | Vinstallation_directory | |
234 | = Ffile_name_as_directory (dir); | |
235 | break; | |
236 | } | |
237 | } | |
238 | } | |
239 | } | |
240 | ||
241 | /* See if dir's parent contains those subdirs. */ | |
242 | tem = Fexpand_file_name (build_string ("../lisp"), dir); | |
243 | lisp_exists = Ffile_exists_p (tem); | |
244 | if (!NILP (lisp_exists)) | |
245 | { | |
246 | tem = Fexpand_file_name (build_string ("../lib-src"), dir); | |
247 | lib_src_exists = Ffile_exists_p (tem); | |
248 | if (!NILP (lib_src_exists)) | |
249 | { | |
250 | tem = Fexpand_file_name (build_string ("../etc"), dir); | |
251 | etc_exists = Ffile_exists_p (tem); | |
252 | if (!NILP (etc_exists)) | |
253 | { | |
254 | tem = Fexpand_file_name (build_string ("../info"), dir); | |
255 | info_exists = Ffile_exists_p (tem); | |
256 | if (!NILP (info_exists)) | |
257 | { | |
258 | tem = Fexpand_file_name (build_string (".."), dir); | |
259 | Vinstallation_directory | |
260 | = Ffile_name_as_directory (tem); | |
261 | break; | |
262 | } | |
263 | } | |
264 | } | |
265 | } | |
266 | ||
267 | /* If the Emacs executable is actually a link, | |
268 | next try the dir that the link points into. */ | |
269 | tem = Ffile_symlink_p (name); | |
270 | if (!NILP (tem)) | |
271 | { | |
272 | name = tem; | |
273 | dir = Ffile_name_directory (name); | |
274 | } | |
275 | else | |
276 | break; | |
277 | } | |
278 | } | |
279 | ||
f927c5ae JB |
280 | Vcommand_line_args = Qnil; |
281 | ||
282 | for (i = argc - 1; i >= 0; i--) | |
283 | { | |
284 | if (i == 0 || i > skip_args) | |
285 | Vcommand_line_args | |
286 | = Fcons (build_string (argv[i]), Vcommand_line_args); | |
287 | } | |
288 | } | |
59653951 JB |
289 | |
290 | DEFUN ("invocation-name", Finvocation_name, Sinvocation_name, 0, 0, 0, | |
291 | "Return the program name that was used to run Emacs.\n\ | |
292 | Any directory names are omitted.") | |
293 | () | |
294 | { | |
295 | return Fcopy_sequence (Vinvocation_name); | |
296 | } | |
297 | ||
ace40a69 RS |
298 | DEFUN ("invocation-directory", Finvocation_directory, Sinvocation_directory, |
299 | 0, 0, 0, | |
300 | "Return the directory name in which the Emacs executable was located") | |
301 | () | |
302 | { | |
303 | return Fcopy_sequence (Vinvocation_directory); | |
304 | } | |
305 | ||
f927c5ae JB |
306 | \f |
307 | #ifdef VMS | |
308 | #ifdef LINK_CRTL_SHARE | |
309 | #ifdef SHAREABLE_LIB_BUG | |
310 | extern noshare char **environ; | |
311 | #endif /* SHAREABLE_LIB_BUG */ | |
312 | #endif /* LINK_CRTL_SHARE */ | |
313 | #endif /* VMS */ | |
314 | ||
a90538cb | 315 | #ifndef ORDINARY_LINK |
efd241cc RS |
316 | /* We don't include crtbegin.o and crtend.o in the link, |
317 | so these functions and variables might be missed. | |
318 | Provide dummy definitions to avoid error. | |
319 | (We don't have any real constructors or destructors.) */ | |
320 | #ifdef __GNUC__ | |
46e65b73 | 321 | #ifndef GCC_CTORS_IN_LIBC |
c83a7064 | 322 | __do_global_ctors () |
efd241cc | 323 | {} |
c83a7064 RS |
324 | __do_global_ctors_aux () |
325 | {} | |
33143604 RS |
326 | __do_global_dtors () |
327 | {} | |
64c1864a RS |
328 | /* Linux has a bug in its library; avoid an error. */ |
329 | #ifndef LINUX | |
c83a7064 | 330 | char * __CTOR_LIST__[2] = { (char *) (-1), 0 }; |
64c1864a | 331 | #endif |
c83a7064 | 332 | char * __DTOR_LIST__[2] = { (char *) (-1), 0 }; |
46e65b73 | 333 | #endif /* GCC_CTORS_IN_LIBC */ |
c83a7064 | 334 | __main () |
efd241cc | 335 | {} |
efd241cc | 336 | #endif /* __GNUC__ */ |
a90538cb | 337 | #endif /* ORDINARY_LINK */ |
efd241cc | 338 | |
f927c5ae JB |
339 | /* ARGSUSED */ |
340 | main (argc, argv, envp) | |
341 | int argc; | |
342 | char **argv; | |
343 | char **envp; | |
344 | { | |
345 | char stack_bottom_variable; | |
346 | int skip_args = 0; | |
347 | extern int errno; | |
348 | extern sys_nerr; | |
f927c5ae JB |
349 | |
350 | /* Map in shared memory, if we are using that. */ | |
351 | #ifdef HAVE_SHM | |
352 | if (argc > 1 && !strcmp (argv[1], "-nl")) | |
353 | { | |
354 | map_in_data (0); | |
355 | /* The shared memory was just restored, which clobbered this. */ | |
356 | skip_args = 1; | |
357 | } | |
358 | else | |
359 | { | |
360 | map_in_data (1); | |
361 | /* The shared memory was just restored, which clobbered this. */ | |
362 | skip_args = 0; | |
363 | } | |
364 | #endif | |
365 | ||
19a36ec6 | 366 | #ifdef NeXT |
4b163808 | 367 | extern int malloc_cookie; |
19a36ec6 RS |
368 | |
369 | /* This helps out unexnext.c. */ | |
370 | if (initialized) | |
371 | if (malloc_jumpstart (malloc_cookie) != 0) | |
372 | printf ("malloc jumpstart failed!\n"); | |
373 | #endif /* NeXT */ | |
374 | ||
f927c5ae | 375 | #ifdef HAVE_X_WINDOWS |
fb8e9847 JB |
376 | /* Stupid kludge to catch command-line display spec. We can't |
377 | handle this argument entirely in window system dependent code | |
378 | because we don't even know which window system dependent code | |
379 | to run until we've recognized this argument. */ | |
f927c5ae JB |
380 | { |
381 | int i; | |
382 | ||
383 | for (i = 1; (i < argc && ! display_arg); i++) | |
92381c7c | 384 | if (!strcmp (argv[i], "-d") || !strcmp (argv[i], "-display")) |
f927c5ae JB |
385 | display_arg = 1; |
386 | } | |
387 | #endif | |
388 | ||
389 | #ifdef VMS | |
390 | /* If -map specified, map the data file in */ | |
391 | if (argc > 2 && ! strcmp (argv[1], "-map")) | |
392 | { | |
393 | skip_args = 2; | |
394 | mapin_data (argv[2]); | |
395 | } | |
396 | ||
397 | #ifdef LINK_CRTL_SHARE | |
398 | #ifdef SHAREABLE_LIB_BUG | |
399 | /* Bletcherous shared libraries! */ | |
400 | if (!stdin) | |
401 | stdin = fdopen (0, "r"); | |
402 | if (!stdout) | |
403 | stdout = fdopen (1, "w"); | |
404 | if (!stderr) | |
405 | stderr = fdopen (2, "w"); | |
406 | if (!environ) | |
407 | environ = envp; | |
408 | #endif /* SHAREABLE_LIB_BUG */ | |
409 | #endif /* LINK_CRTL_SHARE */ | |
410 | #endif /* VMS */ | |
411 | ||
412 | /* Record (approximately) where the stack begins. */ | |
413 | stack_bottom = &stack_bottom_variable; | |
414 | ||
415 | #ifdef RUN_TIME_REMAP | |
416 | if (initialized) | |
417 | run_time_remap (argv[0]); | |
418 | #endif | |
419 | ||
420 | #ifdef USG_SHARED_LIBRARIES | |
421 | if (bss_end) | |
422 | brk (bss_end); | |
423 | #endif | |
424 | ||
425 | clearerr (stdin); | |
9ae8f997 | 426 | |
93e74a71 | 427 | #ifdef BSD_PGRPS |
e8589b11 RS |
428 | if (initialized) |
429 | { | |
430 | inherited_pgroup = EMACS_GETPGRP (0); | |
431 | setpgrp (0, getpid ()); | |
432 | } | |
b026af49 RS |
433 | #else |
434 | #if defined (USG5) && defined (INTERRUPT_INPUT) | |
435 | setpgrp (); | |
436 | #endif | |
f927c5ae JB |
437 | #endif |
438 | ||
9ae8f997 | 439 | |
f927c5ae JB |
440 | #ifdef APOLLO |
441 | #ifndef APOLLO_SR10 | |
442 | /* If USE_DOMAIN_ACLS environment variable exists, | |
443 | use ACLs rather than UNIX modes. */ | |
444 | if (egetenv ("USE_DOMAIN_ACLS")) | |
445 | default_acl (USE_DEFACL); | |
446 | #endif | |
447 | #endif /* APOLLO */ | |
448 | ||
449 | #ifndef SYSTEM_MALLOC | |
450 | if (! initialized) | |
9ac0d9e0 JB |
451 | { |
452 | /* Arrange to get warning messages as memory fills up. */ | |
453 | memory_warnings (0, malloc_warning); | |
454 | ||
455 | /* Arrange to disable interrupt input while malloc and friends are | |
456 | running. */ | |
457 | uninterrupt_malloc (); | |
458 | } | |
f927c5ae JB |
459 | #endif /* not SYSTEM_MALLOC */ |
460 | ||
29b89fe0 RS |
461 | #ifdef MSDOS |
462 | /* We do all file input/output as binary files. When we need to translate | |
463 | newlines, we do that manually. */ | |
464 | _fmode = O_BINARY; | |
465 | (stdin)->_flag &= ~_IOTEXT; | |
466 | (stdout)->_flag &= ~_IOTEXT; | |
467 | (stderr)->_flag &= ~_IOTEXT; | |
468 | #endif /* MSDOS */ | |
469 | ||
3005da00 RS |
470 | #ifdef PRIO_PROCESS |
471 | if (emacs_priority) | |
5aa7f46a | 472 | nice (emacs_priority); |
f927c5ae | 473 | setuid (getuid ()); |
3005da00 | 474 | #endif /* PRIO_PROCESS */ |
f927c5ae | 475 | |
d8b3a65d RS |
476 | #ifdef EXTRA_INITIALIZE |
477 | EXTRA_INITIALIZE (); | |
478 | #endif | |
479 | ||
f927c5ae JB |
480 | inhibit_window_system = 0; |
481 | ||
4fc0b45b | 482 | /* Handle the -t switch, which specifies filename to use as terminal */ |
f927c5ae JB |
483 | if (skip_args + 2 < argc && !strcmp (argv[skip_args + 1], "-t")) |
484 | { | |
485 | int result; | |
486 | skip_args += 2; | |
487 | close (0); | |
488 | close (1); | |
489 | result = open (argv[skip_args], O_RDWR, 2 ); | |
490 | if (result < 0) | |
491 | { | |
be06db9a | 492 | char *errstring = strerror (errno); |
f927c5ae JB |
493 | fprintf (stderr, "emacs: %s: %s\n", argv[skip_args], errstring); |
494 | exit (1); | |
495 | } | |
496 | dup (0); | |
497 | if (! isatty (0)) | |
498 | { | |
499 | fprintf (stderr, "emacs: %s: not a tty\n", argv[skip_args]); | |
500 | exit (1); | |
501 | } | |
502 | fprintf (stderr, "Using %s\n", argv[skip_args]); | |
503 | #ifdef HAVE_X_WINDOWS | |
504 | inhibit_window_system = 1; /* -t => -nw */ | |
505 | #endif | |
506 | } | |
507 | ||
508 | if (skip_args + 1 < argc | |
509 | && (!strcmp (argv[skip_args + 1], "-nw"))) | |
510 | { | |
511 | skip_args += 1; | |
512 | inhibit_window_system = 1; | |
513 | } | |
514 | ||
515 | /* Handle the -batch switch, which means don't do interactive display. */ | |
516 | noninteractive = 0; | |
517 | if (skip_args + 1 < argc && !strcmp (argv[skip_args + 1], "-batch")) | |
518 | { | |
519 | skip_args += 1; | |
520 | noninteractive = 1; | |
521 | } | |
522 | ||
fb8e9847 JB |
523 | #ifdef POSIX_SIGNALS |
524 | init_signals (); | |
525 | #endif | |
526 | ||
f927c5ae JB |
527 | if ( |
528 | #ifndef CANNOT_DUMP | |
529 | ! noninteractive || initialized | |
530 | #else | |
531 | 1 | |
532 | #endif | |
533 | ) | |
534 | { | |
535 | /* Don't catch these signals in batch mode if not initialized. | |
536 | On some machines, this sets static data that would make | |
537 | signal fail to work right when the dumped Emacs is run. */ | |
538 | signal (SIGHUP, fatal_error_signal); | |
539 | signal (SIGQUIT, fatal_error_signal); | |
540 | signal (SIGILL, fatal_error_signal); | |
541 | signal (SIGTRAP, fatal_error_signal); | |
a90538cb JB |
542 | #ifdef SIGIOT |
543 | /* This is missing on some systems - OS/2, for example. */ | |
f927c5ae | 544 | signal (SIGIOT, fatal_error_signal); |
a90538cb | 545 | #endif |
f927c5ae JB |
546 | #ifdef SIGEMT |
547 | signal (SIGEMT, fatal_error_signal); | |
548 | #endif | |
549 | signal (SIGFPE, fatal_error_signal); | |
00eaaa32 | 550 | #ifdef SIGBUS |
f927c5ae | 551 | signal (SIGBUS, fatal_error_signal); |
00eaaa32 | 552 | #endif |
f927c5ae | 553 | signal (SIGSEGV, fatal_error_signal); |
00eaaa32 | 554 | #ifdef SIGSYS |
f927c5ae | 555 | signal (SIGSYS, fatal_error_signal); |
00eaaa32 | 556 | #endif |
f927c5ae JB |
557 | signal (SIGTERM, fatal_error_signal); |
558 | #ifdef SIGXCPU | |
559 | signal (SIGXCPU, fatal_error_signal); | |
560 | #endif | |
561 | #ifdef SIGXFSZ | |
562 | signal (SIGXFSZ, fatal_error_signal); | |
563 | #endif /* SIGXFSZ */ | |
564 | ||
271c7b7c RS |
565 | #ifdef SIGDANGER |
566 | /* This just means available memory is getting low. */ | |
567 | signal (SIGDANGER, memory_warning_signal); | |
568 | #endif | |
569 | ||
f927c5ae | 570 | #ifdef AIX |
56e034fa RS |
571 | /* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU. */ |
572 | signal (SIGXCPU, fatal_error_signal); | |
0aef8561 | 573 | #ifndef _I386 |
f927c5ae | 574 | signal (SIGIOINT, fatal_error_signal); |
0aef8561 | 575 | #endif |
f927c5ae JB |
576 | signal (SIGGRANT, fatal_error_signal); |
577 | signal (SIGRETRACT, fatal_error_signal); | |
578 | signal (SIGSOUND, fatal_error_signal); | |
579 | signal (SIGMSG, fatal_error_signal); | |
580 | #endif /* AIX */ | |
581 | } | |
582 | ||
583 | noninteractive1 = noninteractive; | |
584 | ||
585 | /* Perform basic initializations (not merely interning symbols) */ | |
586 | ||
587 | if (!initialized) | |
588 | { | |
589 | init_alloc_once (); | |
590 | init_obarray (); | |
591 | init_eval_once (); | |
592 | init_syntax_once (); /* Create standard syntax table. */ | |
593 | /* Must be done before init_buffer */ | |
594 | init_casetab_once (); | |
595 | init_buffer_once (); /* Create buffer table and some buffers */ | |
596 | init_minibuf_once (); /* Create list of minibuffers */ | |
597 | /* Must precede init_window_once */ | |
598 | init_window_once (); /* Init the window system */ | |
599 | } | |
600 | ||
601 | init_alloc (); | |
f927c5ae JB |
602 | init_eval (); |
603 | init_data (); | |
0e956009 | 604 | |
29b89fe0 RS |
605 | #ifdef MSDOS |
606 | /* Call early 'cause init_environment needs it. */ | |
607 | init_dosfns (); | |
608 | /* Set defaults for several environment variables. */ | |
609 | if (initialized) init_environment (argc, argv, skip_args); | |
610 | #endif | |
611 | ||
0e956009 JB |
612 | /* egetenv is a pretty low-level facility, which may get called in |
613 | many circumstances; it seems flimsy to put off initializing it | |
614 | until calling init_callproc. */ | |
615 | set_process_environment (); | |
93aed04d RS |
616 | /* AIX crashes are reported in system versions 3.2.3 and 3.2.4 |
617 | if this is not done. Do it after set_process_environment so that we | |
618 | don't pollute Vprocess_environment. */ | |
619 | #ifdef AIX | |
620 | putenv ("LANG=C"); | |
621 | #endif | |
0e956009 | 622 | |
ace40a69 RS |
623 | init_buffer (); /* Init default directory of main buffer */ |
624 | ||
7928f0b5 | 625 | init_callproc_1 (); /* Must precede init_cmdargs and init_sys_modes. */ |
ace40a69 | 626 | init_cmdargs (argc, argv, skip_args); /* Must precede init_lread. */ |
7928f0b5 | 627 | init_callproc (); /* Must follow init_cmdargs but not init_sys_modes. */ |
fb8e9847 | 628 | init_lread (); |
f927c5ae | 629 | |
f927c5ae JB |
630 | if (!noninteractive) |
631 | { | |
632 | #ifdef VMS | |
1cbd5d9d | 633 | init_vms_input ();/* init_display calls get_frame_size, that needs this */ |
f927c5ae JB |
634 | #endif /* VMS */ |
635 | init_display (); /* Determine terminal type. init_sys_modes uses results */ | |
636 | } | |
637 | init_keyboard (); /* This too must precede init_sys_modes */ | |
f927c5ae JB |
638 | #ifdef VMS |
639 | init_vmsproc (); /* And this too. */ | |
640 | #endif /* VMS */ | |
641 | init_sys_modes (); /* Init system terminal modes (RAW or CBREAK, etc.) */ | |
642 | init_xdisp (); | |
643 | init_macros (); | |
644 | init_editfns (); | |
645 | #ifdef LISP_FLOAT_TYPE | |
646 | init_floatfns (); | |
647 | #endif | |
648 | #ifdef VMS | |
649 | init_vmsfns (); | |
650 | #endif /* VMS */ | |
f927c5ae | 651 | init_process (); |
32676c08 JB |
652 | #ifdef CLASH_DETECTION |
653 | init_filelock (); | |
654 | #endif /* CLASH_DETECTION */ | |
f927c5ae JB |
655 | |
656 | /* Intern the names of all standard functions and variables; define standard keys */ | |
657 | ||
658 | if (!initialized) | |
659 | { | |
660 | /* The basic levels of Lisp must come first */ | |
661 | /* And data must come first of all | |
662 | for the sake of symbols like error-message */ | |
663 | syms_of_data (); | |
664 | syms_of_alloc (); | |
fb8e9847 | 665 | syms_of_lread (); |
f927c5ae JB |
666 | syms_of_print (); |
667 | syms_of_eval (); | |
668 | syms_of_fns (); | |
f927c5ae | 669 | syms_of_floatfns (); |
f927c5ae JB |
670 | |
671 | syms_of_abbrev (); | |
672 | syms_of_buffer (); | |
673 | syms_of_bytecode (); | |
674 | syms_of_callint (); | |
675 | syms_of_casefiddle (); | |
676 | syms_of_casetab (); | |
677 | syms_of_callproc (); | |
678 | syms_of_cmds (); | |
679 | #ifndef NO_DIR_LIBRARY | |
680 | syms_of_dired (); | |
681 | #endif /* not NO_DIR_LIBRARY */ | |
682 | syms_of_display (); | |
683 | syms_of_doc (); | |
684 | syms_of_editfns (); | |
685 | syms_of_emacs (); | |
686 | syms_of_fileio (); | |
687 | #ifdef CLASH_DETECTION | |
688 | syms_of_filelock (); | |
689 | #endif /* CLASH_DETECTION */ | |
690 | syms_of_indent (); | |
691 | syms_of_keyboard (); | |
692 | syms_of_keymap (); | |
693 | syms_of_macros (); | |
694 | syms_of_marker (); | |
695 | syms_of_minibuf (); | |
696 | syms_of_mocklisp (); | |
f927c5ae | 697 | syms_of_process (); |
f927c5ae | 698 | syms_of_search (); |
1cbd5d9d | 699 | syms_of_frame (); |
f927c5ae | 700 | syms_of_syntax (); |
0d934e7b | 701 | syms_of_term (); |
f927c5ae | 702 | syms_of_undo (); |
bef79ee4 JA |
703 | |
704 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ | |
705 | syms_of_textprop (); | |
f927c5ae JB |
706 | #ifdef VMS |
707 | syms_of_vmsproc (); | |
708 | #endif /* VMS */ | |
709 | syms_of_window (); | |
710 | syms_of_xdisp (); | |
711 | #ifdef HAVE_X_WINDOWS | |
72412588 | 712 | syms_of_xterm (); |
f927c5ae | 713 | syms_of_xfns (); |
9c3f23b7 | 714 | syms_of_xfaces (); |
72412588 JB |
715 | #ifdef HAVE_X11 |
716 | syms_of_xselect (); | |
717 | #endif | |
dbc4e1c1 | 718 | #ifdef HAVE_X_MENU |
f927c5ae JB |
719 | syms_of_xmenu (); |
720 | #endif /* HAVE_X_MENU */ | |
721 | #endif /* HAVE_X_WINDOWS */ | |
722 | ||
723 | #ifdef SYMS_SYSTEM | |
724 | SYMS_SYSTEM; | |
725 | #endif | |
726 | ||
727 | #ifdef SYMS_MACHINE | |
728 | SYMS_MACHINE; | |
729 | #endif | |
730 | ||
731 | keys_of_casefiddle (); | |
732 | keys_of_cmds (); | |
733 | keys_of_buffer (); | |
734 | keys_of_keyboard (); | |
735 | keys_of_keymap (); | |
736 | keys_of_macros (); | |
737 | keys_of_minibuf (); | |
738 | keys_of_window (); | |
5e67fbc2 | 739 | keys_of_frame (); |
f927c5ae JB |
740 | } |
741 | ||
742 | if (!initialized) | |
743 | { | |
744 | /* Handle -l loadup-and-dump, args passed by Makefile. */ | |
745 | if (argc > 2 + skip_args && !strcmp (argv[1 + skip_args], "-l")) | |
746 | Vtop_level = Fcons (intern ("load"), | |
747 | Fcons (build_string (argv[2 + skip_args]), Qnil)); | |
748 | #ifdef CANNOT_DUMP | |
749 | /* Unless next switch is -nl, load "loadup.el" first thing. */ | |
750 | if (!(argc > 1 + skip_args && !strcmp (argv[1 + skip_args], "-nl"))) | |
751 | Vtop_level = Fcons (intern ("load"), | |
752 | Fcons (build_string ("loadup.el"), Qnil)); | |
753 | #endif /* CANNOT_DUMP */ | |
754 | } | |
755 | ||
756 | initialized = 1; | |
757 | ||
afe9fae9 RS |
758 | #if defined (sun) || defined (LOCALTIME_CACHE) |
759 | /* sun's localtime has a bug. it caches the value of the time | |
279cc2b8 JB |
760 | zone rather than looking it up every time. Since localtime() is |
761 | called to bolt the undumping time into the undumped emacs, this | |
afe9fae9 RS |
762 | results in localtime ignoring the TZ environment variable. |
763 | This flushes the new TZ value into localtime. */ | |
764 | tzset (); | |
765 | #endif /* defined (sun) || defined (LOCALTIME_CACHE) */ | |
279cc2b8 | 766 | |
f927c5ae JB |
767 | /* Enter editor command loop. This never returns. */ |
768 | Frecursive_edit (); | |
769 | /* NOTREACHED */ | |
770 | } | |
771 | \f | |
772 | DEFUN ("kill-emacs", Fkill_emacs, Skill_emacs, 0, 1, "P", | |
edc8ae07 | 773 | "Exit the Emacs job and kill it.\n\ |
f927c5ae JB |
774 | If ARG is an integer, return ARG as the exit program code.\n\ |
775 | If ARG is a string, stuff it as keyboard input.\n\n\ | |
776 | The value of `kill-emacs-hook', if not void,\n\ | |
777 | is a list of functions (of no args),\n\ | |
778 | all of which are called before Emacs is actually killed.") | |
779 | (arg) | |
780 | Lisp_Object arg; | |
781 | { | |
782 | Lisp_Object hook, hook1; | |
783 | int i; | |
784 | struct gcpro gcpro1; | |
785 | ||
786 | GCPRO1 (arg); | |
787 | ||
788 | if (feof (stdin)) | |
789 | arg = Qt; | |
790 | ||
2447c626 | 791 | if (!NILP (Vrun_hooks) && !noninteractive) |
f927c5ae JB |
792 | call1 (Vrun_hooks, intern ("kill-emacs-hook")); |
793 | ||
f927c5ae JB |
794 | UNGCPRO; |
795 | ||
796 | /* Is it really necessary to do this deassign | |
797 | when we are going to exit anyway? */ | |
798 | /* #ifdef VMS | |
799 | stop_vms_input (); | |
800 | #endif */ | |
40be253a | 801 | |
d0068e25 | 802 | shut_down_emacs (0, 0, STRINGP (arg) ? arg : Qnil); |
40be253a | 803 | |
f927c5ae JB |
804 | exit ((XTYPE (arg) == Lisp_Int) ? XINT (arg) |
805 | #ifdef VMS | |
806 | : 1 | |
807 | #else | |
808 | : 0 | |
809 | #endif | |
810 | ); | |
811 | /* NOTREACHED */ | |
812 | } | |
40be253a JB |
813 | |
814 | ||
815 | /* Perform an orderly shutdown of Emacs. Autosave any modified | |
816 | buffers, kill any child processes, clean up the terminal modes (if | |
817 | we're in the foreground), and other stuff like that. Don't perform | |
818 | any redisplay; this may be called when Emacs is shutting down in | |
819 | the background, or after its X connection has died. | |
820 | ||
821 | If SIG is a signal number, print a message for it. | |
822 | ||
823 | This is called by fatal signal handlers, X protocol error handlers, | |
824 | and Fkill_emacs. */ | |
f7ab4e3d | 825 | |
40be253a | 826 | void |
f7ab4e3d | 827 | shut_down_emacs (sig, no_x, stuff) |
41423a80 | 828 | int sig, no_x; |
f7ab4e3d | 829 | Lisp_Object stuff; |
40be253a | 830 | { |
829d872b RS |
831 | /* Prevent running of hooks from now on. */ |
832 | Vrun_hooks = Qnil; | |
833 | ||
40be253a JB |
834 | /* If we are controlling the terminal, reset terminal modes */ |
835 | #ifdef EMACS_HAVE_TTY_PGRP | |
836 | { | |
d04d81d2 RS |
837 | int pgrp = EMACS_GETPGRP (0); |
838 | ||
40be253a JB |
839 | int tpgrp; |
840 | if (EMACS_GET_TTY_PGRP (0, &tpgrp) != -1 | |
5a570e37 | 841 | && tpgrp == pgrp) |
40be253a JB |
842 | { |
843 | fflush (stdout); | |
844 | reset_sys_modes (); | |
845 | if (sig && sig != SIGTERM) | |
846 | fprintf (stderr, "Fatal error (%d).", sig); | |
847 | } | |
848 | } | |
849 | #else | |
850 | fflush (stdout); | |
851 | reset_sys_modes (); | |
852 | #endif | |
853 | ||
f7ab4e3d RS |
854 | stuff_buffered_input (stuff); |
855 | ||
40be253a JB |
856 | kill_buffer_processes (Qnil); |
857 | Fdo_auto_save (Qt, Qnil); | |
858 | ||
859 | #ifdef CLASH_DETECTION | |
860 | unlock_all_files (); | |
861 | #endif | |
862 | ||
863 | #ifdef VMS | |
864 | kill_vms_processes (); | |
865 | #endif | |
866 | ||
41423a80 RS |
867 | #ifdef HAVE_X_WINDOWS |
868 | if (!noninteractive && EQ (Vwindow_system, intern ("x")) && ! no_x) | |
869 | Fx_close_current_connection (); | |
870 | #endif /* HAVE_X_WINDOWS */ | |
871 | ||
40be253a JB |
872 | #ifdef SIGIO |
873 | /* There is a tendency for a SIGIO signal to arrive within exit, | |
874 | and cause a SIGHUP because the input descriptor is already closed. */ | |
875 | unrequest_sigio (); | |
876 | signal (SIGIO, SIG_IGN); | |
877 | #endif | |
878 | } | |
879 | ||
880 | ||
f927c5ae JB |
881 | \f |
882 | #ifndef CANNOT_DUMP | |
883 | /* Nothing like this can be implemented on an Apollo. | |
884 | What a loss! */ | |
885 | ||
886 | #ifdef HAVE_SHM | |
887 | ||
888 | DEFUN ("dump-emacs-data", Fdump_emacs_data, Sdump_emacs_data, 1, 1, 0, | |
889 | "Dump current state of Emacs into data file FILENAME.\n\ | |
890 | This function exists on systems that use HAVE_SHM.") | |
891 | (intoname) | |
892 | Lisp_Object intoname; | |
893 | { | |
894 | extern int my_edata; | |
895 | Lisp_Object tem; | |
f927c5ae JB |
896 | |
897 | CHECK_STRING (intoname, 0); | |
898 | intoname = Fexpand_file_name (intoname, Qnil); | |
899 | ||
900 | tem = Vpurify_flag; | |
901 | Vpurify_flag = Qnil; | |
902 | ||
903 | fflush (stdout); | |
904 | /* Tell malloc where start of impure now is */ | |
905 | /* Also arrange for warnings when nearly out of space. */ | |
906 | #ifndef SYSTEM_MALLOC | |
70eb2c3e | 907 | memory_warnings (&my_edata, malloc_warning); |
f927c5ae JB |
908 | #endif |
909 | map_out_data (XSTRING (intoname)->data); | |
910 | ||
911 | Vpurify_flag = tem; | |
912 | ||
913 | return Qnil; | |
914 | } | |
915 | ||
916 | #else /* not HAVE_SHM */ | |
917 | ||
918 | DEFUN ("dump-emacs", Fdump_emacs, Sdump_emacs, 2, 2, 0, | |
919 | "Dump current state of Emacs into executable file FILENAME.\n\ | |
920 | Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\ | |
921 | This is used in the file `loadup.el' when building Emacs.\n\ | |
922 | \n\ | |
923 | Bind `command-line-processed' to nil before dumping,\n\ | |
924 | if you want the dumped Emacs to process its command line\n\ | |
925 | and announce itself normally when it is run.") | |
926 | (intoname, symname) | |
927 | Lisp_Object intoname, symname; | |
928 | { | |
929 | extern int my_edata; | |
930 | Lisp_Object tem; | |
f927c5ae JB |
931 | |
932 | CHECK_STRING (intoname, 0); | |
933 | intoname = Fexpand_file_name (intoname, Qnil); | |
2447c626 | 934 | if (!NILP (symname)) |
f927c5ae JB |
935 | { |
936 | CHECK_STRING (symname, 0); | |
937 | if (XSTRING (symname)->size) | |
938 | symname = Fexpand_file_name (symname, Qnil); | |
939 | } | |
940 | ||
941 | tem = Vpurify_flag; | |
942 | Vpurify_flag = Qnil; | |
943 | ||
944 | fflush (stdout); | |
945 | #ifdef VMS | |
946 | mapout_data (XSTRING (intoname)->data); | |
947 | #else | |
948 | /* Tell malloc where start of impure now is */ | |
949 | /* Also arrange for warnings when nearly out of space. */ | |
950 | #ifndef SYSTEM_MALLOC | |
70eb2c3e | 951 | memory_warnings (&my_edata, malloc_warning); |
f927c5ae JB |
952 | #endif |
953 | unexec (XSTRING (intoname)->data, | |
2447c626 | 954 | !NILP (symname) ? XSTRING (symname)->data : 0, &my_edata, 0, 0); |
f927c5ae JB |
955 | #endif /* not VMS */ |
956 | ||
957 | Vpurify_flag = tem; | |
958 | ||
959 | return Qnil; | |
960 | } | |
961 | ||
962 | #endif /* not HAVE_SHM */ | |
963 | ||
964 | #endif /* not CANNOT_DUMP */ | |
965 | \f | |
4b163808 | 966 | #ifndef SEPCHAR |
f927c5ae JB |
967 | #define SEPCHAR ':' |
968 | #endif | |
969 | ||
970 | Lisp_Object | |
971 | decode_env_path (evarname, defalt) | |
972 | char *evarname, *defalt; | |
973 | { | |
974 | register char *path, *p; | |
f927c5ae JB |
975 | |
976 | Lisp_Object lpath; | |
977 | ||
2447c626 JB |
978 | /* It's okay to use getenv here, because this function is only used |
979 | to initialize variables when Emacs starts up, and isn't called | |
980 | after that. */ | |
e065a56e JB |
981 | if (evarname != 0) |
982 | path = (char *) getenv (evarname); | |
983 | else | |
984 | path = 0; | |
f927c5ae JB |
985 | if (!path) |
986 | path = defalt; | |
987 | lpath = Qnil; | |
988 | while (1) | |
989 | { | |
990 | p = index (path, SEPCHAR); | |
991 | if (!p) p = path + strlen (path); | |
992 | lpath = Fcons (p - path ? make_string (path, p - path) : Qnil, | |
993 | lpath); | |
994 | if (*p) | |
995 | path = p + 1; | |
996 | else | |
997 | break; | |
998 | } | |
999 | return Fnreverse (lpath); | |
1000 | } | |
1001 | ||
1002 | syms_of_emacs () | |
1003 | { | |
83591e66 | 1004 | #ifndef CANNOT_DUMP |
f927c5ae JB |
1005 | #ifdef HAVE_SHM |
1006 | defsubr (&Sdump_emacs_data); | |
1007 | #else | |
1008 | defsubr (&Sdump_emacs); | |
83591e66 | 1009 | #endif |
f927c5ae JB |
1010 | #endif |
1011 | ||
1012 | defsubr (&Skill_emacs); | |
1013 | ||
59653951 | 1014 | defsubr (&Sinvocation_name); |
ace40a69 | 1015 | defsubr (&Sinvocation_directory); |
59653951 | 1016 | |
f927c5ae JB |
1017 | DEFVAR_LISP ("command-line-args", &Vcommand_line_args, |
1018 | "Args passed by shell to Emacs, as a list of strings."); | |
1019 | ||
1020 | DEFVAR_LISP ("system-type", &Vsystem_type, | |
1021 | "Value is symbol indicating type of operating system you are using."); | |
1022 | Vsystem_type = intern (SYSTEM_TYPE); | |
1023 | ||
271c7b7c RS |
1024 | DEFVAR_LISP ("system-configuration", &Vsystem_configuration, |
1025 | "Value is string indicating configuration Emacs was built for."); | |
1026 | Vsystem_configuration = build_string (CONFIGURATION); | |
1027 | ||
f927c5ae JB |
1028 | DEFVAR_BOOL ("noninteractive", &noninteractive1, |
1029 | "Non-nil means Emacs is running without interactive terminal."); | |
e5d77022 | 1030 | |
e5d77022 | 1031 | DEFVAR_LISP ("kill-emacs-hook", &Vkill_emacs_hook, |
edc8ae07 JB |
1032 | "Hook to be run whenever kill-emacs is called.\n\ |
1033 | Since kill-emacs may be invoked when the terminal is disconnected (or\n\ | |
1034 | in other similar situations), functions placed on this hook should not\n\ | |
679aee02 | 1035 | expect to be able to interact with the user."); |
edc8ae07 | 1036 | Vkill_emacs_hook = Qnil; |
3005da00 RS |
1037 | |
1038 | DEFVAR_INT ("emacs-priority", &emacs_priority, | |
1039 | "Priority for Emacs to run at.\n\ | |
1040 | This value is effective only if set before Emacs is dumped,\n\ | |
1041 | and only if the Emacs executable is installed with setuid to permit\n\ | |
1042 | it to change priority. (Emacs sets its uid back to the real uid.)"); | |
1043 | emacs_priority = 0; | |
59653951 | 1044 | |
07f4d123 RS |
1045 | staticpro (&Vinstallation_directory); |
1046 | Vinstallation_directory = Qnil; | |
4ee31404 RS |
1047 | |
1048 | /* These have already been set, in init_cmdargs, so don't set them here. */ | |
59653951 | 1049 | staticpro (&Vinvocation_name); |
ace40a69 | 1050 | staticpro (&Vinvocation_directory); |
f927c5ae | 1051 | } |