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 | ||
647cec74 | 97 | #ifdef BSD_PGRPS |
9ae8f997 JB |
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"); | |
55796183 RS |
178 | |
179 | /* It might be unsafe to call do_auto_save now. */ | |
180 | force_auto_save_soon (); | |
271c7b7c RS |
181 | } |
182 | #endif | |
f927c5ae JB |
183 | \f |
184 | /* Code for dealing with Lisp access to the Unix command line */ | |
185 | ||
186 | static | |
187 | init_cmdargs (argc, argv, skip_args) | |
188 | int argc; | |
189 | char **argv; | |
190 | int skip_args; | |
191 | { | |
192 | register int i; | |
07f4d123 | 193 | Lisp_Object name, dir; |
f927c5ae | 194 | |
cb421be8 | 195 | Vinvocation_name = Ffile_name_nondirectory (build_string (argv[0])); |
ace40a69 RS |
196 | Vinvocation_directory = Ffile_name_directory (build_string (argv[0])); |
197 | /* If we got no directory in argv[0], search PATH to find where | |
198 | Emacs actually came from. */ | |
199 | if (NILP (Vinvocation_directory)) | |
200 | { | |
201 | Lisp_Object found; | |
202 | int yes = openp (Vexec_path, Vinvocation_name, | |
6c362a8b | 203 | EXEC_SUFFIXES, &found, 1); |
e443f843 | 204 | if (yes == 1) |
ace40a69 RS |
205 | Vinvocation_directory = Ffile_name_directory (found); |
206 | } | |
59653951 | 207 | |
07f4d123 RS |
208 | Vinstallation_directory = Qnil; |
209 | ||
210 | if (!NILP (Vinvocation_directory)) | |
211 | { | |
212 | dir = Vinvocation_directory; | |
213 | name = Fexpand_file_name (Vinvocation_name, dir); | |
214 | while (1) | |
215 | { | |
f5ab9736 | 216 | Lisp_Object tem, lib_src_exists; |
07f4d123 RS |
217 | Lisp_Object etc_exists, info_exists; |
218 | ||
f5ab9736 RS |
219 | /* See if dir contains subdirs for use by Emacs. |
220 | Check for the ones that would exist in a build directory, | |
221 | not including lisp and info. */ | |
222 | tem = Fexpand_file_name (build_string ("lib-src"), dir); | |
223 | lib_src_exists = Ffile_exists_p (tem); | |
224 | if (!NILP (lib_src_exists)) | |
07f4d123 | 225 | { |
f5ab9736 RS |
226 | tem = Fexpand_file_name (build_string ("etc"), dir); |
227 | etc_exists = Ffile_exists_p (tem); | |
228 | if (!NILP (etc_exists)) | |
07f4d123 | 229 | { |
f5ab9736 RS |
230 | Vinstallation_directory |
231 | = Ffile_name_as_directory (dir); | |
232 | break; | |
07f4d123 RS |
233 | } |
234 | } | |
235 | ||
236 | /* See if dir's parent contains those subdirs. */ | |
f5ab9736 RS |
237 | tem = Fexpand_file_name (build_string ("../lib-src"), dir); |
238 | lib_src_exists = Ffile_exists_p (tem); | |
239 | if (!NILP (lib_src_exists)) | |
07f4d123 | 240 | { |
f5ab9736 RS |
241 | tem = Fexpand_file_name (build_string ("../etc"), dir); |
242 | etc_exists = Ffile_exists_p (tem); | |
243 | if (!NILP (etc_exists)) | |
07f4d123 | 244 | { |
f5ab9736 RS |
245 | tem = Fexpand_file_name (build_string (".."), dir); |
246 | Vinstallation_directory | |
247 | = Ffile_name_as_directory (tem); | |
248 | break; | |
07f4d123 RS |
249 | } |
250 | } | |
251 | ||
252 | /* If the Emacs executable is actually a link, | |
253 | next try the dir that the link points into. */ | |
254 | tem = Ffile_symlink_p (name); | |
255 | if (!NILP (tem)) | |
256 | { | |
257 | name = tem; | |
258 | dir = Ffile_name_directory (name); | |
259 | } | |
260 | else | |
261 | break; | |
262 | } | |
263 | } | |
264 | ||
f927c5ae JB |
265 | Vcommand_line_args = Qnil; |
266 | ||
267 | for (i = argc - 1; i >= 0; i--) | |
268 | { | |
269 | if (i == 0 || i > skip_args) | |
270 | Vcommand_line_args | |
271 | = Fcons (build_string (argv[i]), Vcommand_line_args); | |
272 | } | |
273 | } | |
59653951 JB |
274 | |
275 | DEFUN ("invocation-name", Finvocation_name, Sinvocation_name, 0, 0, 0, | |
276 | "Return the program name that was used to run Emacs.\n\ | |
277 | Any directory names are omitted.") | |
278 | () | |
279 | { | |
280 | return Fcopy_sequence (Vinvocation_name); | |
281 | } | |
282 | ||
ace40a69 RS |
283 | DEFUN ("invocation-directory", Finvocation_directory, Sinvocation_directory, |
284 | 0, 0, 0, | |
285 | "Return the directory name in which the Emacs executable was located") | |
286 | () | |
287 | { | |
288 | return Fcopy_sequence (Vinvocation_directory); | |
289 | } | |
290 | ||
f927c5ae JB |
291 | \f |
292 | #ifdef VMS | |
293 | #ifdef LINK_CRTL_SHARE | |
294 | #ifdef SHAREABLE_LIB_BUG | |
295 | extern noshare char **environ; | |
296 | #endif /* SHAREABLE_LIB_BUG */ | |
297 | #endif /* LINK_CRTL_SHARE */ | |
298 | #endif /* VMS */ | |
299 | ||
a90538cb | 300 | #ifndef ORDINARY_LINK |
efd241cc RS |
301 | /* We don't include crtbegin.o and crtend.o in the link, |
302 | so these functions and variables might be missed. | |
303 | Provide dummy definitions to avoid error. | |
304 | (We don't have any real constructors or destructors.) */ | |
305 | #ifdef __GNUC__ | |
46e65b73 | 306 | #ifndef GCC_CTORS_IN_LIBC |
c83a7064 | 307 | __do_global_ctors () |
efd241cc | 308 | {} |
c83a7064 RS |
309 | __do_global_ctors_aux () |
310 | {} | |
33143604 RS |
311 | __do_global_dtors () |
312 | {} | |
64c1864a RS |
313 | /* Linux has a bug in its library; avoid an error. */ |
314 | #ifndef LINUX | |
c83a7064 | 315 | char * __CTOR_LIST__[2] = { (char *) (-1), 0 }; |
64c1864a | 316 | #endif |
c83a7064 | 317 | char * __DTOR_LIST__[2] = { (char *) (-1), 0 }; |
46e65b73 | 318 | #endif /* GCC_CTORS_IN_LIBC */ |
c83a7064 | 319 | __main () |
efd241cc | 320 | {} |
efd241cc | 321 | #endif /* __GNUC__ */ |
a90538cb | 322 | #endif /* ORDINARY_LINK */ |
efd241cc | 323 | |
f927c5ae JB |
324 | /* ARGSUSED */ |
325 | main (argc, argv, envp) | |
326 | int argc; | |
327 | char **argv; | |
328 | char **envp; | |
329 | { | |
330 | char stack_bottom_variable; | |
331 | int skip_args = 0; | |
332 | extern int errno; | |
333 | extern sys_nerr; | |
f927c5ae JB |
334 | |
335 | /* Map in shared memory, if we are using that. */ | |
336 | #ifdef HAVE_SHM | |
337 | if (argc > 1 && !strcmp (argv[1], "-nl")) | |
338 | { | |
339 | map_in_data (0); | |
340 | /* The shared memory was just restored, which clobbered this. */ | |
341 | skip_args = 1; | |
342 | } | |
343 | else | |
344 | { | |
345 | map_in_data (1); | |
346 | /* The shared memory was just restored, which clobbered this. */ | |
347 | skip_args = 0; | |
348 | } | |
349 | #endif | |
350 | ||
19a36ec6 | 351 | #ifdef NeXT |
4b163808 | 352 | extern int malloc_cookie; |
19a36ec6 RS |
353 | |
354 | /* This helps out unexnext.c. */ | |
355 | if (initialized) | |
356 | if (malloc_jumpstart (malloc_cookie) != 0) | |
357 | printf ("malloc jumpstart failed!\n"); | |
358 | #endif /* NeXT */ | |
359 | ||
f927c5ae | 360 | #ifdef HAVE_X_WINDOWS |
fb8e9847 JB |
361 | /* Stupid kludge to catch command-line display spec. We can't |
362 | handle this argument entirely in window system dependent code | |
363 | because we don't even know which window system dependent code | |
364 | to run until we've recognized this argument. */ | |
f927c5ae JB |
365 | { |
366 | int i; | |
367 | ||
368 | for (i = 1; (i < argc && ! display_arg); i++) | |
92381c7c | 369 | if (!strcmp (argv[i], "-d") || !strcmp (argv[i], "-display")) |
f927c5ae JB |
370 | display_arg = 1; |
371 | } | |
372 | #endif | |
373 | ||
374 | #ifdef VMS | |
375 | /* If -map specified, map the data file in */ | |
376 | if (argc > 2 && ! strcmp (argv[1], "-map")) | |
377 | { | |
378 | skip_args = 2; | |
379 | mapin_data (argv[2]); | |
380 | } | |
381 | ||
382 | #ifdef LINK_CRTL_SHARE | |
383 | #ifdef SHAREABLE_LIB_BUG | |
384 | /* Bletcherous shared libraries! */ | |
385 | if (!stdin) | |
386 | stdin = fdopen (0, "r"); | |
387 | if (!stdout) | |
388 | stdout = fdopen (1, "w"); | |
389 | if (!stderr) | |
390 | stderr = fdopen (2, "w"); | |
391 | if (!environ) | |
392 | environ = envp; | |
393 | #endif /* SHAREABLE_LIB_BUG */ | |
394 | #endif /* LINK_CRTL_SHARE */ | |
395 | #endif /* VMS */ | |
396 | ||
397 | /* Record (approximately) where the stack begins. */ | |
398 | stack_bottom = &stack_bottom_variable; | |
399 | ||
400 | #ifdef RUN_TIME_REMAP | |
401 | if (initialized) | |
402 | run_time_remap (argv[0]); | |
403 | #endif | |
404 | ||
405 | #ifdef USG_SHARED_LIBRARIES | |
406 | if (bss_end) | |
407 | brk (bss_end); | |
408 | #endif | |
409 | ||
410 | clearerr (stdin); | |
9ae8f997 | 411 | |
391fb073 | 412 | if (! noninteractive1) |
e8589b11 | 413 | { |
391fb073 RS |
414 | #ifdef BSD_PGRPS |
415 | if (initialized) | |
416 | { | |
417 | inherited_pgroup = EMACS_GETPGRP (0); | |
418 | setpgrp (0, getpid ()); | |
419 | } | |
b026af49 RS |
420 | #else |
421 | #if defined (USG5) && defined (INTERRUPT_INPUT) | |
391fb073 | 422 | setpgrp (); |
b026af49 | 423 | #endif |
f927c5ae | 424 | #endif |
391fb073 | 425 | } |
9ae8f997 | 426 | |
f927c5ae JB |
427 | #ifdef APOLLO |
428 | #ifndef APOLLO_SR10 | |
429 | /* If USE_DOMAIN_ACLS environment variable exists, | |
430 | use ACLs rather than UNIX modes. */ | |
431 | if (egetenv ("USE_DOMAIN_ACLS")) | |
432 | default_acl (USE_DEFACL); | |
433 | #endif | |
434 | #endif /* APOLLO */ | |
435 | ||
436 | #ifndef SYSTEM_MALLOC | |
437 | if (! initialized) | |
9ac0d9e0 JB |
438 | { |
439 | /* Arrange to get warning messages as memory fills up. */ | |
440 | memory_warnings (0, malloc_warning); | |
441 | ||
442 | /* Arrange to disable interrupt input while malloc and friends are | |
443 | running. */ | |
444 | uninterrupt_malloc (); | |
445 | } | |
f927c5ae JB |
446 | #endif /* not SYSTEM_MALLOC */ |
447 | ||
29b89fe0 RS |
448 | #ifdef MSDOS |
449 | /* We do all file input/output as binary files. When we need to translate | |
450 | newlines, we do that manually. */ | |
451 | _fmode = O_BINARY; | |
452 | (stdin)->_flag &= ~_IOTEXT; | |
453 | (stdout)->_flag &= ~_IOTEXT; | |
454 | (stderr)->_flag &= ~_IOTEXT; | |
455 | #endif /* MSDOS */ | |
456 | ||
a422068f | 457 | #ifdef SET_EMACS_PRIORITY |
3005da00 | 458 | if (emacs_priority) |
5aa7f46a | 459 | nice (emacs_priority); |
f927c5ae | 460 | setuid (getuid ()); |
a422068f | 461 | #endif /* SET_EMACS_PRIORITY */ |
f927c5ae | 462 | |
d8b3a65d | 463 | #ifdef EXTRA_INITIALIZE |
a9260219 | 464 | EXTRA_INITIALIZE; |
d8b3a65d RS |
465 | #endif |
466 | ||
f927c5ae JB |
467 | inhibit_window_system = 0; |
468 | ||
4fc0b45b | 469 | /* Handle the -t switch, which specifies filename to use as terminal */ |
f927c5ae JB |
470 | if (skip_args + 2 < argc && !strcmp (argv[skip_args + 1], "-t")) |
471 | { | |
472 | int result; | |
473 | skip_args += 2; | |
474 | close (0); | |
475 | close (1); | |
476 | result = open (argv[skip_args], O_RDWR, 2 ); | |
477 | if (result < 0) | |
478 | { | |
be06db9a | 479 | char *errstring = strerror (errno); |
f927c5ae JB |
480 | fprintf (stderr, "emacs: %s: %s\n", argv[skip_args], errstring); |
481 | exit (1); | |
482 | } | |
483 | dup (0); | |
484 | if (! isatty (0)) | |
485 | { | |
486 | fprintf (stderr, "emacs: %s: not a tty\n", argv[skip_args]); | |
487 | exit (1); | |
488 | } | |
489 | fprintf (stderr, "Using %s\n", argv[skip_args]); | |
490 | #ifdef HAVE_X_WINDOWS | |
491 | inhibit_window_system = 1; /* -t => -nw */ | |
492 | #endif | |
493 | } | |
494 | ||
495 | if (skip_args + 1 < argc | |
496 | && (!strcmp (argv[skip_args + 1], "-nw"))) | |
497 | { | |
498 | skip_args += 1; | |
499 | inhibit_window_system = 1; | |
500 | } | |
501 | ||
502 | /* Handle the -batch switch, which means don't do interactive display. */ | |
503 | noninteractive = 0; | |
504 | if (skip_args + 1 < argc && !strcmp (argv[skip_args + 1], "-batch")) | |
505 | { | |
506 | skip_args += 1; | |
507 | noninteractive = 1; | |
508 | } | |
509 | ||
fb8e9847 JB |
510 | #ifdef POSIX_SIGNALS |
511 | init_signals (); | |
512 | #endif | |
513 | ||
f927c5ae JB |
514 | if ( |
515 | #ifndef CANNOT_DUMP | |
516 | ! noninteractive || initialized | |
517 | #else | |
518 | 1 | |
519 | #endif | |
520 | ) | |
521 | { | |
522 | /* Don't catch these signals in batch mode if not initialized. | |
523 | On some machines, this sets static data that would make | |
524 | signal fail to work right when the dumped Emacs is run. */ | |
525 | signal (SIGHUP, fatal_error_signal); | |
526 | signal (SIGQUIT, fatal_error_signal); | |
527 | signal (SIGILL, fatal_error_signal); | |
528 | signal (SIGTRAP, fatal_error_signal); | |
a90538cb JB |
529 | #ifdef SIGIOT |
530 | /* This is missing on some systems - OS/2, for example. */ | |
f927c5ae | 531 | signal (SIGIOT, fatal_error_signal); |
a90538cb | 532 | #endif |
f927c5ae JB |
533 | #ifdef SIGEMT |
534 | signal (SIGEMT, fatal_error_signal); | |
535 | #endif | |
536 | signal (SIGFPE, fatal_error_signal); | |
00eaaa32 | 537 | #ifdef SIGBUS |
f927c5ae | 538 | signal (SIGBUS, fatal_error_signal); |
00eaaa32 | 539 | #endif |
f927c5ae | 540 | signal (SIGSEGV, fatal_error_signal); |
00eaaa32 | 541 | #ifdef SIGSYS |
f927c5ae | 542 | signal (SIGSYS, fatal_error_signal); |
00eaaa32 | 543 | #endif |
f927c5ae JB |
544 | signal (SIGTERM, fatal_error_signal); |
545 | #ifdef SIGXCPU | |
546 | signal (SIGXCPU, fatal_error_signal); | |
547 | #endif | |
548 | #ifdef SIGXFSZ | |
549 | signal (SIGXFSZ, fatal_error_signal); | |
550 | #endif /* SIGXFSZ */ | |
551 | ||
271c7b7c RS |
552 | #ifdef SIGDANGER |
553 | /* This just means available memory is getting low. */ | |
554 | signal (SIGDANGER, memory_warning_signal); | |
555 | #endif | |
556 | ||
f927c5ae | 557 | #ifdef AIX |
56e034fa RS |
558 | /* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU. */ |
559 | signal (SIGXCPU, fatal_error_signal); | |
0aef8561 | 560 | #ifndef _I386 |
f927c5ae | 561 | signal (SIGIOINT, fatal_error_signal); |
0aef8561 | 562 | #endif |
f927c5ae JB |
563 | signal (SIGGRANT, fatal_error_signal); |
564 | signal (SIGRETRACT, fatal_error_signal); | |
565 | signal (SIGSOUND, fatal_error_signal); | |
566 | signal (SIGMSG, fatal_error_signal); | |
567 | #endif /* AIX */ | |
568 | } | |
569 | ||
570 | noninteractive1 = noninteractive; | |
571 | ||
572 | /* Perform basic initializations (not merely interning symbols) */ | |
573 | ||
574 | if (!initialized) | |
575 | { | |
576 | init_alloc_once (); | |
577 | init_obarray (); | |
578 | init_eval_once (); | |
579 | init_syntax_once (); /* Create standard syntax table. */ | |
580 | /* Must be done before init_buffer */ | |
581 | init_casetab_once (); | |
582 | init_buffer_once (); /* Create buffer table and some buffers */ | |
583 | init_minibuf_once (); /* Create list of minibuffers */ | |
584 | /* Must precede init_window_once */ | |
585 | init_window_once (); /* Init the window system */ | |
586 | } | |
587 | ||
588 | init_alloc (); | |
f927c5ae JB |
589 | init_eval (); |
590 | init_data (); | |
0e956009 | 591 | |
29b89fe0 RS |
592 | #ifdef MSDOS |
593 | /* Call early 'cause init_environment needs it. */ | |
594 | init_dosfns (); | |
595 | /* Set defaults for several environment variables. */ | |
596 | if (initialized) init_environment (argc, argv, skip_args); | |
597 | #endif | |
598 | ||
0e956009 JB |
599 | /* egetenv is a pretty low-level facility, which may get called in |
600 | many circumstances; it seems flimsy to put off initializing it | |
601 | until calling init_callproc. */ | |
602 | set_process_environment (); | |
93aed04d RS |
603 | /* AIX crashes are reported in system versions 3.2.3 and 3.2.4 |
604 | if this is not done. Do it after set_process_environment so that we | |
605 | don't pollute Vprocess_environment. */ | |
606 | #ifdef AIX | |
607 | putenv ("LANG=C"); | |
608 | #endif | |
0e956009 | 609 | |
ace40a69 RS |
610 | init_buffer (); /* Init default directory of main buffer */ |
611 | ||
7928f0b5 | 612 | init_callproc_1 (); /* Must precede init_cmdargs and init_sys_modes. */ |
ace40a69 | 613 | init_cmdargs (argc, argv, skip_args); /* Must precede init_lread. */ |
7928f0b5 | 614 | init_callproc (); /* Must follow init_cmdargs but not init_sys_modes. */ |
fb8e9847 | 615 | init_lread (); |
f927c5ae | 616 | |
f927c5ae JB |
617 | if (!noninteractive) |
618 | { | |
619 | #ifdef VMS | |
1cbd5d9d | 620 | init_vms_input ();/* init_display calls get_frame_size, that needs this */ |
f927c5ae JB |
621 | #endif /* VMS */ |
622 | init_display (); /* Determine terminal type. init_sys_modes uses results */ | |
623 | } | |
624 | init_keyboard (); /* This too must precede init_sys_modes */ | |
f927c5ae JB |
625 | #ifdef VMS |
626 | init_vmsproc (); /* And this too. */ | |
627 | #endif /* VMS */ | |
628 | init_sys_modes (); /* Init system terminal modes (RAW or CBREAK, etc.) */ | |
629 | init_xdisp (); | |
630 | init_macros (); | |
631 | init_editfns (); | |
632 | #ifdef LISP_FLOAT_TYPE | |
633 | init_floatfns (); | |
634 | #endif | |
635 | #ifdef VMS | |
636 | init_vmsfns (); | |
637 | #endif /* VMS */ | |
f927c5ae | 638 | init_process (); |
32676c08 JB |
639 | #ifdef CLASH_DETECTION |
640 | init_filelock (); | |
641 | #endif /* CLASH_DETECTION */ | |
f927c5ae JB |
642 | |
643 | /* Intern the names of all standard functions and variables; define standard keys */ | |
644 | ||
645 | if (!initialized) | |
646 | { | |
647 | /* The basic levels of Lisp must come first */ | |
648 | /* And data must come first of all | |
649 | for the sake of symbols like error-message */ | |
650 | syms_of_data (); | |
651 | syms_of_alloc (); | |
fb8e9847 | 652 | syms_of_lread (); |
f927c5ae JB |
653 | syms_of_print (); |
654 | syms_of_eval (); | |
655 | syms_of_fns (); | |
f927c5ae | 656 | syms_of_floatfns (); |
f927c5ae JB |
657 | |
658 | syms_of_abbrev (); | |
659 | syms_of_buffer (); | |
660 | syms_of_bytecode (); | |
661 | syms_of_callint (); | |
662 | syms_of_casefiddle (); | |
663 | syms_of_casetab (); | |
664 | syms_of_callproc (); | |
665 | syms_of_cmds (); | |
666 | #ifndef NO_DIR_LIBRARY | |
667 | syms_of_dired (); | |
668 | #endif /* not NO_DIR_LIBRARY */ | |
669 | syms_of_display (); | |
670 | syms_of_doc (); | |
671 | syms_of_editfns (); | |
672 | syms_of_emacs (); | |
673 | syms_of_fileio (); | |
674 | #ifdef CLASH_DETECTION | |
675 | syms_of_filelock (); | |
676 | #endif /* CLASH_DETECTION */ | |
677 | syms_of_indent (); | |
678 | syms_of_keyboard (); | |
679 | syms_of_keymap (); | |
680 | syms_of_macros (); | |
681 | syms_of_marker (); | |
682 | syms_of_minibuf (); | |
683 | syms_of_mocklisp (); | |
f927c5ae | 684 | syms_of_process (); |
f927c5ae | 685 | syms_of_search (); |
1cbd5d9d | 686 | syms_of_frame (); |
f927c5ae | 687 | syms_of_syntax (); |
0d934e7b | 688 | syms_of_term (); |
f927c5ae | 689 | syms_of_undo (); |
bef79ee4 JA |
690 | |
691 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ | |
692 | syms_of_textprop (); | |
f927c5ae JB |
693 | #ifdef VMS |
694 | syms_of_vmsproc (); | |
695 | #endif /* VMS */ | |
696 | syms_of_window (); | |
697 | syms_of_xdisp (); | |
698 | #ifdef HAVE_X_WINDOWS | |
72412588 | 699 | syms_of_xterm (); |
f927c5ae | 700 | syms_of_xfns (); |
9c3f23b7 | 701 | syms_of_xfaces (); |
72412588 JB |
702 | #ifdef HAVE_X11 |
703 | syms_of_xselect (); | |
704 | #endif | |
dbc4e1c1 | 705 | #ifdef HAVE_X_MENU |
f927c5ae JB |
706 | syms_of_xmenu (); |
707 | #endif /* HAVE_X_MENU */ | |
708 | #endif /* HAVE_X_WINDOWS */ | |
709 | ||
710 | #ifdef SYMS_SYSTEM | |
711 | SYMS_SYSTEM; | |
712 | #endif | |
713 | ||
714 | #ifdef SYMS_MACHINE | |
715 | SYMS_MACHINE; | |
716 | #endif | |
717 | ||
718 | keys_of_casefiddle (); | |
719 | keys_of_cmds (); | |
720 | keys_of_buffer (); | |
721 | keys_of_keyboard (); | |
722 | keys_of_keymap (); | |
723 | keys_of_macros (); | |
724 | keys_of_minibuf (); | |
725 | keys_of_window (); | |
5e67fbc2 | 726 | keys_of_frame (); |
f927c5ae JB |
727 | } |
728 | ||
729 | if (!initialized) | |
730 | { | |
731 | /* Handle -l loadup-and-dump, args passed by Makefile. */ | |
732 | if (argc > 2 + skip_args && !strcmp (argv[1 + skip_args], "-l")) | |
733 | Vtop_level = Fcons (intern ("load"), | |
734 | Fcons (build_string (argv[2 + skip_args]), Qnil)); | |
735 | #ifdef CANNOT_DUMP | |
736 | /* Unless next switch is -nl, load "loadup.el" first thing. */ | |
737 | if (!(argc > 1 + skip_args && !strcmp (argv[1 + skip_args], "-nl"))) | |
738 | Vtop_level = Fcons (intern ("load"), | |
739 | Fcons (build_string ("loadup.el"), Qnil)); | |
740 | #endif /* CANNOT_DUMP */ | |
741 | } | |
742 | ||
743 | initialized = 1; | |
744 | ||
afe9fae9 RS |
745 | #if defined (sun) || defined (LOCALTIME_CACHE) |
746 | /* sun's localtime has a bug. it caches the value of the time | |
279cc2b8 JB |
747 | zone rather than looking it up every time. Since localtime() is |
748 | called to bolt the undumping time into the undumped emacs, this | |
afe9fae9 RS |
749 | results in localtime ignoring the TZ environment variable. |
750 | This flushes the new TZ value into localtime. */ | |
751 | tzset (); | |
752 | #endif /* defined (sun) || defined (LOCALTIME_CACHE) */ | |
279cc2b8 | 753 | |
f927c5ae JB |
754 | /* Enter editor command loop. This never returns. */ |
755 | Frecursive_edit (); | |
756 | /* NOTREACHED */ | |
757 | } | |
758 | \f | |
759 | DEFUN ("kill-emacs", Fkill_emacs, Skill_emacs, 0, 1, "P", | |
edc8ae07 | 760 | "Exit the Emacs job and kill it.\n\ |
f927c5ae JB |
761 | If ARG is an integer, return ARG as the exit program code.\n\ |
762 | If ARG is a string, stuff it as keyboard input.\n\n\ | |
763 | The value of `kill-emacs-hook', if not void,\n\ | |
764 | is a list of functions (of no args),\n\ | |
765 | all of which are called before Emacs is actually killed.") | |
766 | (arg) | |
767 | Lisp_Object arg; | |
768 | { | |
769 | Lisp_Object hook, hook1; | |
770 | int i; | |
771 | struct gcpro gcpro1; | |
772 | ||
773 | GCPRO1 (arg); | |
774 | ||
775 | if (feof (stdin)) | |
776 | arg = Qt; | |
777 | ||
2447c626 | 778 | if (!NILP (Vrun_hooks) && !noninteractive) |
f927c5ae JB |
779 | call1 (Vrun_hooks, intern ("kill-emacs-hook")); |
780 | ||
f927c5ae JB |
781 | UNGCPRO; |
782 | ||
783 | /* Is it really necessary to do this deassign | |
784 | when we are going to exit anyway? */ | |
785 | /* #ifdef VMS | |
786 | stop_vms_input (); | |
787 | #endif */ | |
40be253a | 788 | |
d0068e25 | 789 | shut_down_emacs (0, 0, STRINGP (arg) ? arg : Qnil); |
40be253a | 790 | |
f927c5ae JB |
791 | exit ((XTYPE (arg) == Lisp_Int) ? XINT (arg) |
792 | #ifdef VMS | |
793 | : 1 | |
794 | #else | |
795 | : 0 | |
796 | #endif | |
797 | ); | |
798 | /* NOTREACHED */ | |
799 | } | |
40be253a JB |
800 | |
801 | ||
802 | /* Perform an orderly shutdown of Emacs. Autosave any modified | |
803 | buffers, kill any child processes, clean up the terminal modes (if | |
804 | we're in the foreground), and other stuff like that. Don't perform | |
805 | any redisplay; this may be called when Emacs is shutting down in | |
806 | the background, or after its X connection has died. | |
807 | ||
808 | If SIG is a signal number, print a message for it. | |
809 | ||
810 | This is called by fatal signal handlers, X protocol error handlers, | |
811 | and Fkill_emacs. */ | |
f7ab4e3d | 812 | |
40be253a | 813 | void |
f7ab4e3d | 814 | shut_down_emacs (sig, no_x, stuff) |
41423a80 | 815 | int sig, no_x; |
f7ab4e3d | 816 | Lisp_Object stuff; |
40be253a | 817 | { |
829d872b RS |
818 | /* Prevent running of hooks from now on. */ |
819 | Vrun_hooks = Qnil; | |
820 | ||
40be253a JB |
821 | /* If we are controlling the terminal, reset terminal modes */ |
822 | #ifdef EMACS_HAVE_TTY_PGRP | |
823 | { | |
d04d81d2 RS |
824 | int pgrp = EMACS_GETPGRP (0); |
825 | ||
40be253a JB |
826 | int tpgrp; |
827 | if (EMACS_GET_TTY_PGRP (0, &tpgrp) != -1 | |
5a570e37 | 828 | && tpgrp == pgrp) |
40be253a JB |
829 | { |
830 | fflush (stdout); | |
831 | reset_sys_modes (); | |
832 | if (sig && sig != SIGTERM) | |
833 | fprintf (stderr, "Fatal error (%d).", sig); | |
834 | } | |
835 | } | |
836 | #else | |
837 | fflush (stdout); | |
838 | reset_sys_modes (); | |
839 | #endif | |
840 | ||
f7ab4e3d RS |
841 | stuff_buffered_input (stuff); |
842 | ||
40be253a JB |
843 | kill_buffer_processes (Qnil); |
844 | Fdo_auto_save (Qt, Qnil); | |
845 | ||
846 | #ifdef CLASH_DETECTION | |
847 | unlock_all_files (); | |
848 | #endif | |
849 | ||
850 | #ifdef VMS | |
851 | kill_vms_processes (); | |
852 | #endif | |
853 | ||
41423a80 | 854 | #ifdef HAVE_X_WINDOWS |
f7511647 RS |
855 | /* It's not safe to call intern here. Maybe we are crashing. */ |
856 | if (!noninteractive && SYMBOLP (Vwindow_system) | |
857 | && XSYMBOL (Vwindow_system)->name->size == 1 | |
858 | && XSYMBOL (Vwindow_system)->name->data[0] == 'x' | |
859 | && ! no_x) | |
41423a80 RS |
860 | Fx_close_current_connection (); |
861 | #endif /* HAVE_X_WINDOWS */ | |
862 | ||
40be253a JB |
863 | #ifdef SIGIO |
864 | /* There is a tendency for a SIGIO signal to arrive within exit, | |
865 | and cause a SIGHUP because the input descriptor is already closed. */ | |
866 | unrequest_sigio (); | |
867 | signal (SIGIO, SIG_IGN); | |
868 | #endif | |
869 | } | |
870 | ||
871 | ||
f927c5ae JB |
872 | \f |
873 | #ifndef CANNOT_DUMP | |
874 | /* Nothing like this can be implemented on an Apollo. | |
875 | What a loss! */ | |
876 | ||
877 | #ifdef HAVE_SHM | |
878 | ||
879 | DEFUN ("dump-emacs-data", Fdump_emacs_data, Sdump_emacs_data, 1, 1, 0, | |
880 | "Dump current state of Emacs into data file FILENAME.\n\ | |
881 | This function exists on systems that use HAVE_SHM.") | |
882 | (intoname) | |
883 | Lisp_Object intoname; | |
884 | { | |
885 | extern int my_edata; | |
886 | Lisp_Object tem; | |
f927c5ae JB |
887 | |
888 | CHECK_STRING (intoname, 0); | |
889 | intoname = Fexpand_file_name (intoname, Qnil); | |
890 | ||
891 | tem = Vpurify_flag; | |
892 | Vpurify_flag = Qnil; | |
893 | ||
894 | fflush (stdout); | |
895 | /* Tell malloc where start of impure now is */ | |
896 | /* Also arrange for warnings when nearly out of space. */ | |
897 | #ifndef SYSTEM_MALLOC | |
70eb2c3e | 898 | memory_warnings (&my_edata, malloc_warning); |
f927c5ae JB |
899 | #endif |
900 | map_out_data (XSTRING (intoname)->data); | |
901 | ||
902 | Vpurify_flag = tem; | |
903 | ||
904 | return Qnil; | |
905 | } | |
906 | ||
907 | #else /* not HAVE_SHM */ | |
908 | ||
909 | DEFUN ("dump-emacs", Fdump_emacs, Sdump_emacs, 2, 2, 0, | |
910 | "Dump current state of Emacs into executable file FILENAME.\n\ | |
911 | Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\ | |
912 | This is used in the file `loadup.el' when building Emacs.\n\ | |
913 | \n\ | |
914 | Bind `command-line-processed' to nil before dumping,\n\ | |
915 | if you want the dumped Emacs to process its command line\n\ | |
916 | and announce itself normally when it is run.") | |
917 | (intoname, symname) | |
918 | Lisp_Object intoname, symname; | |
919 | { | |
920 | extern int my_edata; | |
921 | Lisp_Object tem; | |
f927c5ae JB |
922 | |
923 | CHECK_STRING (intoname, 0); | |
924 | intoname = Fexpand_file_name (intoname, Qnil); | |
2447c626 | 925 | if (!NILP (symname)) |
f927c5ae JB |
926 | { |
927 | CHECK_STRING (symname, 0); | |
928 | if (XSTRING (symname)->size) | |
929 | symname = Fexpand_file_name (symname, Qnil); | |
930 | } | |
931 | ||
932 | tem = Vpurify_flag; | |
933 | Vpurify_flag = Qnil; | |
934 | ||
935 | fflush (stdout); | |
936 | #ifdef VMS | |
937 | mapout_data (XSTRING (intoname)->data); | |
938 | #else | |
939 | /* Tell malloc where start of impure now is */ | |
940 | /* Also arrange for warnings when nearly out of space. */ | |
941 | #ifndef SYSTEM_MALLOC | |
70eb2c3e | 942 | memory_warnings (&my_edata, malloc_warning); |
f927c5ae JB |
943 | #endif |
944 | unexec (XSTRING (intoname)->data, | |
2447c626 | 945 | !NILP (symname) ? XSTRING (symname)->data : 0, &my_edata, 0, 0); |
f927c5ae JB |
946 | #endif /* not VMS */ |
947 | ||
948 | Vpurify_flag = tem; | |
949 | ||
950 | return Qnil; | |
951 | } | |
952 | ||
953 | #endif /* not HAVE_SHM */ | |
954 | ||
955 | #endif /* not CANNOT_DUMP */ | |
956 | \f | |
4b163808 | 957 | #ifndef SEPCHAR |
f927c5ae JB |
958 | #define SEPCHAR ':' |
959 | #endif | |
960 | ||
961 | Lisp_Object | |
962 | decode_env_path (evarname, defalt) | |
963 | char *evarname, *defalt; | |
964 | { | |
965 | register char *path, *p; | |
f927c5ae JB |
966 | |
967 | Lisp_Object lpath; | |
968 | ||
2447c626 JB |
969 | /* It's okay to use getenv here, because this function is only used |
970 | to initialize variables when Emacs starts up, and isn't called | |
971 | after that. */ | |
e065a56e JB |
972 | if (evarname != 0) |
973 | path = (char *) getenv (evarname); | |
974 | else | |
975 | path = 0; | |
f927c5ae JB |
976 | if (!path) |
977 | path = defalt; | |
978 | lpath = Qnil; | |
979 | while (1) | |
980 | { | |
981 | p = index (path, SEPCHAR); | |
982 | if (!p) p = path + strlen (path); | |
983 | lpath = Fcons (p - path ? make_string (path, p - path) : Qnil, | |
984 | lpath); | |
985 | if (*p) | |
986 | path = p + 1; | |
987 | else | |
988 | break; | |
989 | } | |
990 | return Fnreverse (lpath); | |
991 | } | |
992 | ||
993 | syms_of_emacs () | |
994 | { | |
83591e66 | 995 | #ifndef CANNOT_DUMP |
f927c5ae JB |
996 | #ifdef HAVE_SHM |
997 | defsubr (&Sdump_emacs_data); | |
998 | #else | |
999 | defsubr (&Sdump_emacs); | |
83591e66 | 1000 | #endif |
f927c5ae JB |
1001 | #endif |
1002 | ||
1003 | defsubr (&Skill_emacs); | |
1004 | ||
59653951 | 1005 | defsubr (&Sinvocation_name); |
ace40a69 | 1006 | defsubr (&Sinvocation_directory); |
59653951 | 1007 | |
f927c5ae JB |
1008 | DEFVAR_LISP ("command-line-args", &Vcommand_line_args, |
1009 | "Args passed by shell to Emacs, as a list of strings."); | |
1010 | ||
1011 | DEFVAR_LISP ("system-type", &Vsystem_type, | |
1012 | "Value is symbol indicating type of operating system you are using."); | |
1013 | Vsystem_type = intern (SYSTEM_TYPE); | |
1014 | ||
271c7b7c RS |
1015 | DEFVAR_LISP ("system-configuration", &Vsystem_configuration, |
1016 | "Value is string indicating configuration Emacs was built for."); | |
f7511647 | 1017 | Vsystem_configuration = build_string (EMACS_CONFIGURATION); |
271c7b7c | 1018 | |
f927c5ae JB |
1019 | DEFVAR_BOOL ("noninteractive", &noninteractive1, |
1020 | "Non-nil means Emacs is running without interactive terminal."); | |
e5d77022 | 1021 | |
e5d77022 | 1022 | DEFVAR_LISP ("kill-emacs-hook", &Vkill_emacs_hook, |
edc8ae07 JB |
1023 | "Hook to be run whenever kill-emacs is called.\n\ |
1024 | Since kill-emacs may be invoked when the terminal is disconnected (or\n\ | |
1025 | in other similar situations), functions placed on this hook should not\n\ | |
679aee02 | 1026 | expect to be able to interact with the user."); |
edc8ae07 | 1027 | Vkill_emacs_hook = Qnil; |
3005da00 RS |
1028 | |
1029 | DEFVAR_INT ("emacs-priority", &emacs_priority, | |
1030 | "Priority for Emacs to run at.\n\ | |
1031 | This value is effective only if set before Emacs is dumped,\n\ | |
1032 | and only if the Emacs executable is installed with setuid to permit\n\ | |
621ecf99 | 1033 | it to change priority. (Emacs sets its uid back to the real uid.)\n\ |
a422068f | 1034 | Currently, you need to define SET_EMACS_PRIORITY in `config.h'\n\ |
ce305b11 | 1035 | before you compile Emacs, to enable the code for this feature."); |
3005da00 | 1036 | emacs_priority = 0; |
59653951 | 1037 | |
f67de86f RS |
1038 | DEFVAR_LISP ("invocation-name", &Vinvocation_name, |
1039 | "The program name that was used to run Emacs.\n\ | |
1040 | Any directory names are omitted."); | |
1041 | ||
1042 | DEFVAR_LISP ("invocation-directory", &Vinvocation_directory, | |
1043 | "The directory in which the Emacs executable was found, to run it.\n\ | |
1044 | The value is nil if that directory's name is not known."); | |
1045 | ||
1046 | DEFVAR_LISP ("installation-directory", &Vinstallation_directory, | |
1047 | "A directory within which to look for the `lib-src' and `etc' directories.\n\ | |
1048 | This is non-nil when we can't find those directories in their standard\n\ | |
1049 | installed locations, but we can find them\n\ | |
1050 | near where the Emacs executable was found."); | |
07f4d123 | 1051 | Vinstallation_directory = Qnil; |
f927c5ae | 1052 | } |