emacs.c 70.1 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* Fully extensible Emacs, running on Unix, intended for GNU.
2
   Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1997, 1998, 1999,
3 4
                 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
                 Free Software Foundation, Inc.
Jim Blandy's avatar
Jim Blandy committed
5 6 7

This file is part of GNU Emacs.

8
GNU Emacs is free software: you can redistribute it and/or modify
Jim Blandy's avatar
Jim Blandy committed
9
it under the terms of the GNU General Public License as published by
10 11
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Jim Blandy's avatar
Jim Blandy committed
12 13 14 15 16 17 18

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
19
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
Jim Blandy's avatar
Jim Blandy committed
20 21


22
#include <config.h>
Jim Blandy's avatar
Jim Blandy committed
23 24 25 26 27 28 29
#include <signal.h>
#include <errno.h>
#include <stdio.h>

#include <sys/types.h>
#include <sys/file.h>

30 31 32 33
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

34
#ifdef BSD_SYSTEM
Jim Blandy's avatar
Jim Blandy committed
35 36 37
#include <sys/ioctl.h>
#endif

38 39
#ifdef WINDOWSNT
#include <fcntl.h>
40 41
#include <windows.h> /* just for w32.h */
#include "w32.h"
42
#include "w32heap.h" /* for prototype of sbrk */
43 44
#endif

45 46 47 48 49
#ifdef NS_IMPL_GNUSTEP
/* At least under Debian, GSConfig is in a subdirectory.  --Stef  */
#include <GNUstepBase/GSConfig.h>
#endif

Jim Blandy's avatar
Jim Blandy committed
50 51
#include "lisp.h"
#include "commands.h"
Joseph Arceneaux's avatar
Joseph Arceneaux committed
52
#include "intervals.h"
Richard M. Stallman's avatar
Richard M. Stallman committed
53
#include "buffer.h"
Stefan Monnier's avatar
Stefan Monnier committed
54
#include "window.h"
Jim Blandy's avatar
Jim Blandy committed
55

56
#include "systty.h"
Richard M. Stallman's avatar
Richard M. Stallman committed
57
#include "blockinput.h"
58
#include "syssignal.h"
Richard M. Stallman's avatar
Richard M. Stallman committed
59
#include "process.h"
60
#include "frame.h"
61
#include "termhooks.h"
Andreas Schwab's avatar
Andreas Schwab committed
62
#include "keyboard.h"
Stefan Monnier's avatar
Stefan Monnier committed
63
#include "keymap.h"
Jim Blandy's avatar
Jim Blandy committed
64

65 66 67 68
#ifdef HAVE_SETLOCALE
#include <locale.h>
#endif

69 70 71 72 73
#ifdef HAVE_SETRLIMIT
#include <sys/time.h>
#include <sys/resource.h>
#endif

74 75 76 77
#ifdef HAVE_PERSONALITY_LINUX32
#include <sys/personality.h>
#endif

Jim Blandy's avatar
Jim Blandy committed
78 79 80 81
#ifndef O_RDWR
#define O_RDWR 2
#endif

82
#ifdef HAVE_SETPGID
83
#if !defined (USG) || defined (BSD_PGRPS)
84
#undef setpgrp
85 86
#define setpgrp setpgid
#endif
87
#endif
88

89 90
extern void malloc_warning P_ ((char *));
extern void set_time_zone_rule P_ ((char *));
Gerd Moellmann's avatar
Gerd Moellmann committed
91 92 93
#ifdef HAVE_INDEX
extern char *index P_ ((const char *, int));
#endif
94

95 96
/* Make these values available in GDB, which doesn't see macros.  */

Kenichi Handa's avatar
Kenichi Handa committed
97 98 99 100 101
#ifdef USE_LSB_TAG
int gdb_use_lsb = 1;
#else
int gdb_use_lsb = 0;
#endif
Dan Nicolaescu's avatar
Dan Nicolaescu committed
102
#ifndef USE_LISP_UNION_TYPE
Kenichi Handa's avatar
Kenichi Handa committed
103 104 105 106
int gdb_use_union = 0;
#else
int gdb_use_union = 1;
#endif
107 108 109 110 111
EMACS_INT gdb_valbits = VALBITS;
EMACS_INT gdb_gctypebits = GCTYPEBITS;
#ifdef DATA_SEG_BITS
EMACS_INT gdb_data_seg_bits = DATA_SEG_BITS;
#else
112
EMACS_INT gdb_data_seg_bits = 0;
113
#endif
Gerd Moellmann's avatar
Gerd Moellmann committed
114
EMACS_INT PVEC_FLAG = PSEUDOVECTOR_FLAG;
115
EMACS_INT gdb_array_mark_flag = ARRAY_MARK_FLAG;
116 117 118
/* GDB might say "No enum type named pvec_type" if we don't have at
   least one symbol with that type, and then xbacktrace could fail.  */
enum pvec_type gdb_pvec_type = PVEC_TYPE_MASK;
119

Pavel Janík's avatar
Pavel Janík committed
120
/* Command line args from shell, as list of strings.  */
Jim Blandy's avatar
Jim Blandy committed
121 122
Lisp_Object Vcommand_line_args;

123 124 125 126
/* The name under which Emacs was invoked, with any leading directory
   names discarded.  */
Lisp_Object Vinvocation_name;

127 128 129
/* The directory name from which Emacs was invoked.  */
Lisp_Object Vinvocation_directory;

130 131 132 133
/* The directory name in which to find subdirs such as lisp and etc.
   nil means get them only from PATH_LOADSEARCH.  */
Lisp_Object Vinstallation_directory;

Jim Blandy's avatar
Jim Blandy committed
134 135 136
/* Hook run by `kill-emacs' before it does really anything.  */
Lisp_Object Vkill_emacs_hook;

137 138
/* Empty lisp strings.  To avoid having to build any others.  */
Lisp_Object empty_unibyte_string, empty_multibyte_string;
Stefan Monnier's avatar
Stefan Monnier committed
139

140 141 142
/* Search path separator.  */
Lisp_Object Vpath_separator;

Jim Blandy's avatar
Jim Blandy committed
143 144 145 146 147
/* Set nonzero after Emacs has started up the first time.
  Prevents reinitialization of the Lisp world and keymaps
  on subsequent starts.  */
int initialized;

148 149 150 151 152 153 154
#ifdef DOUG_LEA_MALLOC
/* Preserves a pointer to the memory allocated that copies that
   static data inside glibc's malloc.  */
void *malloc_state_ptr;
/* From glibc, a routine that returns a copy of the malloc internal state.  */
extern void *malloc_get_state ();
/* From glibc, a routine that overwrites the malloc internal state.  */
155
extern int malloc_set_state ();
156 157 158
/* Non-zero if the MALLOC_CHECK_ enviroment variable was set while
   dumping.  Used to work around a bug in glibc's malloc.  */
int malloc_using_checking;
159 160
#endif

161
/* Variable whose value is symbol giving operating system type.  */
Jim Blandy's avatar
Jim Blandy committed
162
Lisp_Object Vsystem_type;
163 164 165

/* Variable whose value is string giving configuration built for.  */
Lisp_Object Vsystem_configuration;
166 167 168 169 170

/* Variable whose value is string giving configuration options,
   for use when reporting bugs.  */
Lisp_Object Vsystem_configuration_options;

171 172
Lisp_Object Qfile_name_handler_alist;

173
/* Current and previous system locales for messages and time.  */
174 175 176 177
Lisp_Object Vsystem_messages_locale;
Lisp_Object Vprevious_system_messages_locale;
Lisp_Object Vsystem_time_locale;
Lisp_Object Vprevious_system_time_locale;
178

Juanma Barranquero's avatar
Juanma Barranquero committed
179
/* If non-zero, emacs should not attempt to use a window-specific code,
Pavel Janík's avatar
Pavel Janík committed
180
   but instead should use the virtual terminal under which it was started.  */
Jim Blandy's avatar
Jim Blandy committed
181 182
int inhibit_window_system;

183 184
/* If nonzero, set Emacs to run at this priority.  This is also used
   in child_setup and sys_suspend to make sure subshells run at normal
Pavel Janík's avatar
Pavel Janík committed
185
   priority; those functions have their own extern declaration.  */
186
EMACS_INT emacs_priority;
187

Pavel Janík's avatar
Pavel Janík committed
188 189
/* If non-zero, a filter or a sentinel is running.  Tested to save the match
   data on the first attempt to change it inside asynchronous code.  */
190 191
int running_asynch_code;

192
#ifdef BSD_PGRPS
193 194 195 196
/* See sysdep.c.  */
extern int inherited_pgroup;
#endif

197
#if defined(HAVE_X_WINDOWS) || defined(HAVE_NS)
Pavel Janík's avatar
Pavel Janík committed
198
/* If non-zero, -d was specified, meaning we're using some window system.  */
Jim Blandy's avatar
Jim Blandy committed
199 200 201 202 203 204 205
int display_arg;
#endif

/* An address near the bottom of the stack.
   Tells GC how to save a copy of the stack.  */
char *stack_bottom;

206 207 208 209 210 211 212 213 214 215 216
/* The address where the heap starts (from the first sbrk (0) call).  */
static void *my_heap_start;

/* The gap between BSS end and heap start as far as we can tell.  */
static unsigned long heap_bss_diff;

/* If the gap between BSS end and heap start is larger than this we try to
   work around it, and if that fails, output a warning in dump-emacs.  */
#define MAX_HEAP_BSS_DIFF (1024*1024)


217
#ifdef HAVE_WINDOW_SYSTEM
218
extern Lisp_Object Vinitial_window_system;
219
#endif /* HAVE_WINDOW_SYSTEM */
Jim Blandy's avatar
Jim Blandy committed
220

221 222
extern Lisp_Object Vauto_save_list_file_name;

223 224
extern Lisp_Object Vinhibit_redisplay;

Jim Blandy's avatar
Jim Blandy committed
225 226 227 228 229 230 231 232 233
/* Nonzero means running Emacs without interactive terminal.  */

int noninteractive;

/* Value of Lisp variable `noninteractive'.
   Normally same as C variable `noninteractive'
   but nothing terrible happens if user sets this one.  */

int noninteractive1;
234 235 236 237

/* Save argv and argc.  */
char **initial_argv;
int initial_argc;
238 239

static void sort_args ();
Andreas Schwab's avatar
Andreas Schwab committed
240
void syms_of_emacs ();
Gerd Moellmann's avatar
Gerd Moellmann committed
241

Kenichi Handa's avatar
Kenichi Handa committed
242 243
/* MSVC needs each string be shorter than 2048 bytes, so the usage
   strings below are split to not overflow this limit.  */
244
#define USAGE1 "\
Gerd Moellmann's avatar
Gerd Moellmann committed
245 246 247 248 249 250
Usage: %s [OPTION-OR-FILENAME]...\n\
\n\
Run Emacs, the extensible, customizable, self-documenting real-time\n\
display editor.  The recommended way to start Emacs for normal editing\n\
is with no options at all.\n\
\n\
251
Run M-x info RET m emacs RET m emacs invocation RET inside Emacs to\n\
Gerd Moellmann's avatar
Gerd Moellmann committed
252 253 254 255
read the main documentation for these command-line arguments.\n\
\n\
Initialization options:\n\
\n\
Kenichi Handa's avatar
Kenichi Handa committed
256 257 258 259 260 261 262 263 264
--batch                     do not do interactive display; implies -q\n\
--debug-init                enable Emacs Lisp debugger for init file\n\
--display, -d DISPLAY       use X server DISPLAY\n\
--multibyte, --no-unibyte   inhibit the effect of EMACS_UNIBYTE\n\
--no-desktop                do not load a saved desktop\n\
--no-init-file, -q          load neither ~/.emacs nor default.el\n\
--no-shared-memory, -nl     do not use shared memory\n\
--no-site-file              do not load site-start.el\n\
--no-splash                 do not display a splash screen on startup\n\
265
--no-window-system, -nw     do not communicate with X, ignoring $DISPLAY\n\
266
--quick, -Q                 equivalent to -q --no-site-file --no-splash\n\
Kenichi Handa's avatar
Kenichi Handa committed
267 268
--script FILE               run FILE as an Emacs Lisp script\n\
--terminal, -t DEVICE       use DEVICE for terminal I/O\n\
Gerd Moellmann's avatar
Gerd Moellmann committed
269
--unibyte, --no-multibyte   run Emacs in unibyte mode\n\
Kenichi Handa's avatar
Kenichi Handa committed
270 271 272 273
--user, -u USER             load ~USER/.emacs instead of your own\n\
\n%s"

#define USAGE2 "\
Gerd Moellmann's avatar
Gerd Moellmann committed
274 275
Action options:\n\
\n\
Kenichi Handa's avatar
Kenichi Handa committed
276
FILE                    visit FILE using find-file\n\
Richard M. Stallman's avatar
Richard M. Stallman committed
277 278
+LINE			go to line LINE in next FILE\n\
+LINE:COLUMN		go to line LINE, column COLUMN, in next FILE\n\
Kenichi Handa's avatar
Kenichi Handa committed
279 280 281 282 283 284 285 286 287 288
--directory, -L DIR     add DIR to variable load-path\n\
--eval EXPR             evaluate Emacs Lisp expression EXPR\n\
--execute EXPR          evaluate Emacs Lisp expression EXPR\n\
--file FILE             visit FILE using find-file\n\
--find-file FILE        visit FILE using find-file\n\
--funcall, -f FUNC      call Emacs Lisp function FUNC with no arguments\n\
--insert FILE           insert contents of FILE into current buffer\n\
--kill                  exit without asking for confirmation\n\
--load, -l FILE         load Emacs Lisp FILE using the load function\n\
--visit FILE            visit FILE using find-file\n\
289 290
\n"

Kenichi Handa's avatar
Kenichi Handa committed
291
#define USAGE3 "\
292
Display options:\n\
Gerd Moellmann's avatar
Gerd Moellmann committed
293
\n\
Kenichi Handa's avatar
Kenichi Handa committed
294
--background-color, -bg COLOR   window background color\n\
295 296
--basic-display, -D             disable many display features;\n\
                                  used for debugging Emacs\n\
Kenichi Handa's avatar
Kenichi Handa committed
297 298
--border-color, -bd COLOR       main border color\n\
--border-width, -bw WIDTH       width of main border\n\
299
--color, --color=MODE           override color mode for character terminals;\n\
Kenichi Handa's avatar
Kenichi Handa committed
300 301 302 303 304 305 306 307 308 309
                                  MODE defaults to `auto', and can also\n\
                                  be `never', `auto', `always',\n\
                                  or a mode name like `ansi8'\n\
--cursor-color, -cr COLOR       color of the Emacs cursor indicating point\n\
--font, -fn FONT                default font; must be fixed-width\n\
--foreground-color, -fg COLOR   window foreground color\n\
--fullheight, -fh               make the first frame high as the screen\n\
--fullscreen, -fs               make first frame fullscreen\n\
--fullwidth, -fw                make the first frame wide as the screen\n\
--geometry, -g GEOMETRY         window geometry\n\
Jan Djärv's avatar
Jan Djärv committed
310
--no-bitmap-icon, -nbi          do not use picture of gnu for Emacs icon\n\
Kenichi Handa's avatar
Kenichi Handa committed
311 312 313 314 315
--iconic                        start Emacs in iconified state\n\
--internal-border, -ib WIDTH    width between text and main border\n\
--line-spacing, -lsp PIXELS     additional space to put between lines\n\
--mouse-color, -ms COLOR        mouse cursor color in Emacs window\n\
--name NAME                     title for initial Emacs frame\n\
316
--no-blinking-cursor, -nbc      disable blinking cursor\n\
Kenichi Handa's avatar
Kenichi Handa committed
317 318 319 320
--reverse-video, -r, -rv        switch foreground and background\n\
--title, -T TITLE               title for initial Emacs frame\n\
--vertical-scroll-bars, -vb     enable vertical scroll bars\n\
--xrm XRESOURCES                set additional X resources\n\
Jan Djärv's avatar
Jan Djärv committed
321
--parent-id XID                 set parent window\n\
Kenichi Handa's avatar
Kenichi Handa committed
322 323
--help                          display this help and exit\n\
--version                       output version information and exit\n\
324 325 326
\n"

#define USAGE4 "\
Gerd Moellmann's avatar
Gerd Moellmann committed
327 328 329 330 331 332
You can generally also specify long option names with a single -; for\n\
example, -batch as well as --batch.  You can use any unambiguous\n\
abbreviation for a --option.\n\
\n\
Various environment variables and window system resources also affect\n\
Emacs' operation.  See the main documentation.\n\
333
\n\
334
Report bugs to %s.  First, please see the Bugs\n\
Gerd Moellmann's avatar
Gerd Moellmann committed
335 336
section of the Emacs manual or the file BUGS.\n"

Jim Blandy's avatar
Jim Blandy committed
337

Pavel Janík's avatar
Pavel Janík committed
338
/* Signal code for the fatal signal that was received.  */
Jim Blandy's avatar
Jim Blandy committed
339 340
int fatal_error_code;

Pavel Janík's avatar
Pavel Janík committed
341
/* Nonzero if handling a fatal error already.  */
Jim Blandy's avatar
Jim Blandy committed
342 343
int fatal_error_in_progress;

Pavel Janík's avatar
Pavel Janík committed
344
/* If non-null, call this function from fatal_error_signal before
345 346 347 348
   committing suicide.  */

void (*fatal_error_signal_hook) P_ ((void));

349
#ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
350 351
/* When compiled with GTK and running under Gnome,
   multiple threads may be created.  Keep track of our main
352
   thread to make sure signals are delivered to it (see syssignal.h).  */
353 354 355 356

pthread_t main_thread;
#endif

357

Pavel Janík's avatar
Pavel Janík committed
358
/* Handle bus errors, invalid instruction, etc.  */
Jim Blandy's avatar
Jim Blandy committed
359
SIGTYPE
Jim Blandy's avatar
Jim Blandy committed
360 361 362
fatal_error_signal (sig)
     int sig;
{
363
  SIGNAL_THREAD_CHECK (sig);
Jim Blandy's avatar
Jim Blandy committed
364 365 366
  fatal_error_code = sig;
  signal (sig, SIG_DFL);

367 368
  TOTALLY_UNBLOCK_INPUT;

Jim Blandy's avatar
Jim Blandy committed
369
  /* If fatal error occurs in code below, avoid infinite recursion.  */
370 371 372
  if (! fatal_error_in_progress)
    {
      fatal_error_in_progress = 1;
Jim Blandy's avatar
Jim Blandy committed
373

374
      shut_down_emacs (sig, 0, Qnil);
375
    }
Jim Blandy's avatar
Jim Blandy committed
376

377 378 379 380
  /* Signal the same code; this time it will really be fatal.
     Remember that since we're in a signal handler, the signal we're
     going to send is probably blocked, so we have to unblock it if we
     want to really receive it.  */
381
#ifndef MSDOS
382
  sigunblock (sigmask (fatal_error_code));
383
#endif
384 385 386

  if (fatal_error_signal_hook)
    fatal_error_signal_hook ();
Pavel Janík's avatar
Pavel Janík committed
387

Jim Blandy's avatar
Jim Blandy committed
388 389
  kill (getpid (), fatal_error_code);
}
390 391 392

#ifdef SIGDANGER

Richard M. Stallman's avatar
Richard M. Stallman committed
393
/* Handler for SIGDANGER.  */
394 395 396 397 398
SIGTYPE
memory_warning_signal (sig)
     int sig;
{
  signal (sig, memory_warning_signal);
399
  SIGNAL_THREAD_CHECK (sig);
400 401

  malloc_warning ("Operating system warns that virtual memory is running low.\n");
402 403 404

  /* It might be unsafe to call do_auto_save now.  */
  force_auto_save_soon ();
405 406
}
#endif
Richard M. Stallman's avatar
Richard M. Stallman committed
407 408

/* We define abort, rather than using it from the library,
Karl Heuer's avatar
Karl Heuer committed
409
   so that GDB can return from a breakpoint here.
Pavel Janík's avatar
Pavel Janík committed
410
   MSDOS has its own definition in msdos.c.  */
Richard M. Stallman's avatar
Richard M. Stallman committed
411

412
#if ! defined (DOS_NT) && ! defined (NO_ABORT)
413

414
void
Richard M. Stallman's avatar
Richard M. Stallman committed
415 416 417
abort ()
{
  kill (getpid (), SIGABRT);
418 419
  /* This shouldn't be executed, but it prevents a warning.  */
  exit (1);
Richard M. Stallman's avatar
Richard M. Stallman committed
420
}
Karl Heuer's avatar
Karl Heuer committed
421
#endif
Richard M. Stallman's avatar
Richard M. Stallman committed
422

Jim Blandy's avatar
Jim Blandy committed
423

Pavel Janík's avatar
Pavel Janík committed
424
/* Code for dealing with Lisp access to the Unix command line.  */
Jim Blandy's avatar
Jim Blandy committed
425

Andreas Schwab's avatar
Andreas Schwab committed
426
static void
Jim Blandy's avatar
Jim Blandy committed
427 428 429 430 431 432
init_cmdargs (argc, argv, skip_args)
     int argc;
     char **argv;
     int skip_args;
{
  register int i;
433
  Lisp_Object name, dir, tem;
Juanma Barranquero's avatar
Juanma Barranquero committed
434
  int count = SPECPDL_INDEX ();
435
  Lisp_Object raw_name;
Jim Blandy's avatar
Jim Blandy committed
436

437 438 439
  initial_argv = argv;
  initial_argc = argc;

440 441 442 443 444 445 446 447 448 449 450
  raw_name = build_string (argv[0]);

  /* Add /: to the front of the name
     if it would otherwise be treated as magic.  */
  tem = Ffind_file_name_handler (raw_name, Qt);
  if (! NILP (tem))
    raw_name = concat2 (build_string ("/:"), raw_name);

  Vinvocation_name = Ffile_name_nondirectory (raw_name);
  Vinvocation_directory = Ffile_name_directory (raw_name);

451 452 453 454 455 456
  /* If we got no directory in argv[0], search PATH to find where
     Emacs actually came from.  */
  if (NILP (Vinvocation_directory))
    {
      Lisp_Object found;
      int yes = openp (Vexec_path, Vinvocation_name,
457
		       Vexec_suffixes, &found, make_number (X_OK));
458
      if (yes == 1)
459 460 461 462 463 464 465 466
	{
	  /* Add /: to the front of the name
	     if it would otherwise be treated as magic.  */
	  tem = Ffind_file_name_handler (found, Qt);
	  if (! NILP (tem))
	    found = concat2 (build_string ("/:"), found);
	  Vinvocation_directory = Ffile_name_directory (found);
	}
467
    }
468

469 470
  if (!NILP (Vinvocation_directory)
      && NILP (Ffile_name_absolute_p (Vinvocation_directory)))
471 472
    /* Emacs was started with relative path, like ./emacs.
       Make it absolute.  */
473 474
    Vinvocation_directory = Fexpand_file_name (Vinvocation_directory, Qnil);

475 476 477 478 479 480 481 482
  Vinstallation_directory = Qnil;

  if (!NILP (Vinvocation_directory))
    {
      dir = Vinvocation_directory;
      name = Fexpand_file_name (Vinvocation_name, dir);
      while (1)
	{
483
	  Lisp_Object tem, lib_src_exists;
484 485
	  Lisp_Object etc_exists, info_exists;

486 487 488 489 490
	  /* See if dir contains subdirs for use by Emacs.
	     Check for the ones that would exist in a build directory,
	     not including lisp and info.  */
	  tem = Fexpand_file_name (build_string ("lib-src"), dir);
	  lib_src_exists = Ffile_exists_p (tem);
491

492
#ifdef MSDOS
493 494 495 496 497
	  /* MSDOS installations frequently remove lib-src, but we still
	     must set installation-directory, or else info won't find
	     its files (it uses the value of installation-directory).  */
	  tem = Fexpand_file_name (build_string ("info"), dir);
	  info_exists = Ffile_exists_p (tem);
498 499 500
#else
	  info_exists = Qnil;
#endif
501 502

	  if (!NILP (lib_src_exists) || !NILP (info_exists))
503
	    {
504 505 506
	      tem = Fexpand_file_name (build_string ("etc"), dir);
	      etc_exists = Ffile_exists_p (tem);
	      if (!NILP (etc_exists))
507
		{
508 509 510
		  Vinstallation_directory
		    = Ffile_name_as_directory (dir);
		  break;
511 512 513 514
		}
	    }

	  /* See if dir's parent contains those subdirs.  */
515 516
	  tem = Fexpand_file_name (build_string ("../lib-src"), dir);
	  lib_src_exists = Ffile_exists_p (tem);
517

518 519 520

#ifdef MSDOS
	  /* See the MSDOS commentary above.  */
521 522
	  tem = Fexpand_file_name (build_string ("../info"), dir);
	  info_exists = Ffile_exists_p (tem);
523 524 525
#else
	  info_exists = Qnil;
#endif
526 527

	  if (!NILP (lib_src_exists) || !NILP (info_exists))
528
	    {
529 530 531
	      tem = Fexpand_file_name (build_string ("../etc"), dir);
	      etc_exists = Ffile_exists_p (tem);
	      if (!NILP (etc_exists))
532
		{
533 534 535 536
		  tem = Fexpand_file_name (build_string (".."), dir);
		  Vinstallation_directory
		    = Ffile_name_as_directory (tem);
		  break;
537 538 539 540 541 542 543 544
		}
	    }

	  /* If the Emacs executable is actually a link,
	     next try the dir that the link points into.  */
	  tem = Ffile_symlink_p (name);
	  if (!NILP (tem))
	    {
545
	      name = Fexpand_file_name (tem, dir);
546 547 548 549 550 551 552
	      dir = Ffile_name_directory (name);
	    }
	  else
	    break;
	}
    }

Jim Blandy's avatar
Jim Blandy committed
553 554 555 556 557
  Vcommand_line_args = Qnil;

  for (i = argc - 1; i >= 0; i--)
    {
      if (i == 0 || i > skip_args)
558 559 560
	/* For the moment, we keep arguments as is in unibyte strings.
	   They are decoded in the function command-line after we know
	   locale-coding-system.  */
Jim Blandy's avatar
Jim Blandy committed
561
	Vcommand_line_args
562
	  = Fcons (make_unibyte_string (argv[i], strlen (argv[i])),
563
		   Vcommand_line_args);
Jim Blandy's avatar
Jim Blandy committed
564
    }
565 566

  unbind_to (count, Qnil);
Jim Blandy's avatar
Jim Blandy committed
567
}
568 569

DEFUN ("invocation-name", Finvocation_name, Sinvocation_name, 0, 0, 0,
Pavel Janík's avatar
Pavel Janík committed
570 571 572
       doc: /* Return the program name that was used to run Emacs.
Any directory names are omitted.  */)
     ()
573 574 575 576
{
  return Fcopy_sequence (Vinvocation_name);
}

577
DEFUN ("invocation-directory", Finvocation_directory, Sinvocation_directory,
Pavel Janík's avatar
Pavel Janík committed
578 579 580
       0, 0, 0,
       doc: /* Return the directory name in which the Emacs executable was located.  */)
     ()
581 582 583 584
{
  return Fcopy_sequence (Vinvocation_directory);
}

Jim Blandy's avatar
Jim Blandy committed
585

586 587 588 589 590 591
#ifdef HAVE_TZSET
/* A valid but unlikely value for the TZ environment value.
   It is OK (though a bit slower) if the user actually chooses this value.  */
static char dump_tz[] = "UtC0";
#endif

592
#ifndef ORDINARY_LINK
593 594 595 596 597
/* We don't include crtbegin.o and crtend.o in the link,
   so these functions and variables might be missed.
   Provide dummy definitions to avoid error.
   (We don't have any real constructors or destructors.)  */
#ifdef __GNUC__
598
#ifndef GCC_CTORS_IN_LIBC
Andreas Schwab's avatar
Andreas Schwab committed
599
void __do_global_ctors ()
600
{}
Andreas Schwab's avatar
Andreas Schwab committed
601
void __do_global_ctors_aux ()
602
{}
Andreas Schwab's avatar
Andreas Schwab committed
603
void __do_global_dtors ()
604
{}
Richard M. Stallman's avatar
Richard M. Stallman committed
605
/* GNU/Linux has a bug in its library; avoid an error.  */
606
#ifndef GNU_LINUX
607
char * __CTOR_LIST__[2] = { (char *) (-1), 0 };
608
#endif
609
char * __DTOR_LIST__[2] = { (char *) (-1), 0 };
610
#endif /* GCC_CTORS_IN_LIBC */
Andreas Schwab's avatar
Andreas Schwab committed
611
void __main ()
612 613
{}
#endif /* __GNUC__ */
614
#endif /* ORDINARY_LINK */
615

Karl Heuer's avatar
Karl Heuer committed
616 617 618 619 620 621 622 623 624
/* Test whether the next argument in ARGV matches SSTR or a prefix of
   LSTR (at least MINLEN characters).  If so, then if VALPTR is non-null
   (the argument is supposed to have a value) store in *VALPTR either
   the next argument or the portion of this one after the equal sign.
   ARGV is read starting at position *SKIPPTR; this index is advanced
   by the number of arguments used.

   Too bad we can't just use getopt for all of this, but we don't have
   enough information to do it right.  */
625

Karl Heuer's avatar
Karl Heuer committed
626
static int
627
argmatch (argv, argc, sstr, lstr, minlen, valptr, skipptr)
Karl Heuer's avatar
Karl Heuer committed
628
     char **argv;
629
     int argc;
Karl Heuer's avatar
Karl Heuer committed
630 631 632 633 634 635
     char *sstr;
     char *lstr;
     int minlen;
     char **valptr;
     int *skipptr;
{
636
  char *p = NULL;
Karl Heuer's avatar
Karl Heuer committed
637
  int arglen;
638 639 640 641 642 643 644
  char *arg;

  /* Don't access argv[argc]; give up in advance.  */
  if (argc <= *skipptr + 1)
    return 0;

  arg = argv[*skipptr+1];
Karl Heuer's avatar
Karl Heuer committed
645 646 647 648 649 650 651 652 653 654 655 656 657 658 659
  if (arg == NULL)
    return 0;
  if (strcmp (arg, sstr) == 0)
    {
      if (valptr != NULL)
	{
	  *valptr = argv[*skipptr+2];
	  *skipptr += 2;
	}
      else
	*skipptr += 1;
      return 1;
    }
  arglen = (valptr != NULL && (p = index (arg, '=')) != NULL
	    ? p - arg : strlen (arg));
660
  if (lstr == 0 || arglen < minlen || strncmp (arg, lstr, arglen) != 0)
Karl Heuer's avatar
Karl Heuer committed
661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684
    return 0;
  else if (valptr == NULL)
    {
      *skipptr += 1;
      return 1;
    }
  else if (p != NULL)
    {
      *valptr = p+1;
      *skipptr += 1;
      return 1;
    }
  else if (argv[*skipptr+2] != NULL)
    {
      *valptr = argv[*skipptr+2];
      *skipptr += 2;
      return 1;
    }
  else
    {
      return 0;
    }
}

685
#ifdef DOUG_LEA_MALLOC
Jim Blandy's avatar
Jim Blandy committed
686

687 688 689 690 691 692 693
/* malloc can be invoked even before main (e.g. by the dynamic
   linker), so the dumped malloc state must be restored as early as
   possible using this special hook.  */

static void
malloc_initialize_hook ()
{
694
#ifndef USE_CRT_DLL
695
  extern char **environ;
696
#endif
697

698 699
  if (initialized)
    {
700 701 702
      if (!malloc_using_checking)
	/* Work around a bug in glibc's malloc.  MALLOC_CHECK_ must be
	   ignored if the heap to be restored was constructed without
703 704 705 706
	   malloc checking.  Can't use unsetenv, since that calls malloc.  */
	{
	  char **p;

707
	  for (p = environ; p && *p; p++)
708 709 710 711 712 713 714 715
	    if (strncmp (*p, "MALLOC_CHECK_=", 14) == 0)
	      {
		do
		  *p = p[1];
		while (*++p);
		break;
	      }
	}
716

717
      malloc_set_state (malloc_state_ptr);
718
#ifndef XMALLOC_OVERRUN_CHECK
719
      free (malloc_state_ptr);
720
#endif
721
    }
722
  else
723 724 725 726 727
    {
      if (my_heap_start == 0)
        my_heap_start = sbrk (0);
      malloc_using_checking = getenv ("MALLOC_CHECK_") != NULL;
    }
728 729 730 731 732 733
}

void (*__malloc_initialize_hook) () = malloc_initialize_hook;

#endif /* DOUG_LEA_MALLOC */

734 735 736 737 738 739 740

#define REPORT_EMACS_BUG_ADDRESS "bug-gnu-emacs@gnu.org"
#define REPORT_EMACS_BUG_PRETEST_ADDRESS "emacs-pretest-bug@gnu.org"

/* This function is used to determine an address to which bug report should
   be sent.  */

741 742
char *
bug_reporting_address ()
743
{
744
  int count = 0;
745 746 747 748 749 750 751 752 753
  Lisp_Object temp;
  char *string;

  temp = Fsymbol_value (intern ("emacs-version"));

  /* When `emacs-version' is invalid, use normal address.  */
  if (!STRINGP(temp))
    return REPORT_EMACS_BUG_ADDRESS;

754
  string = SDATA (temp);
755

756 757 758 759 760 761 762
  /* Count dots in `emacs-version'.  */
  while (*string)
    {
      if (*string == '.')
	count++;
      string++;
    }
763 764 765

  /* When `emacs-version' has at least three dots, it is development or
     pretest version of Emacs.  */
766
  return count >= 3 ? REPORT_EMACS_BUG_PRETEST_ADDRESS : REPORT_EMACS_BUG_ADDRESS;
767 768 769
}


770 771
/* ARGSUSED */
int
Dan Nicolaescu's avatar
Dan Nicolaescu committed
772
main (int argc, char **argv)
773
{
774
#if GC_MARK_STACK
775 776
  Lisp_Object dummy;
#endif
777
  char stack_bottom_variable;
778
  int do_initial_setlocale;
779
  int skip_args = 0;
780
#ifndef USE_CRT_DLL
781
  extern int errno;
782
#endif
783 784 785 786
#ifdef HAVE_SETRLIMIT
  struct rlimit rlim;
#endif
  int no_loadup = 0;
Richard M. Stallman's avatar
Richard M. Stallman committed
787
  char *junk = 0;
788

789
#if GC_MARK_STACK
790 791 792 793
  extern Lisp_Object *stack_base;
  stack_base = &dummy;
#endif

794 795 796 797 798 799 800 801 802 803 804
  if (!initialized)
    {
      extern char my_endbss[];
      extern char *my_endbss_static;

      if (my_heap_start == 0)
        my_heap_start = sbrk (0);

      heap_bss_diff = (char *)my_heap_start - max (my_endbss, my_endbss_static);
    }

Dan Nicolaescu's avatar
Dan Nicolaescu committed
805 806
#ifdef LINUX_SBRK_BUG
  /* This is only used GNU/LINUX running on alpha when using libc5 */
807
  __sbrk (1);
808 809
#endif

810 811 812 813 814
#ifdef RUN_TIME_REMAP
  if (initialized)
    run_time_remap (argv[0]);
#endif

815 816
/* If using unexmacosx.c (set by s/darwin.h), we must do this. */
#ifdef DARWIN_OS
817 818 819 820
  if (!initialized)
    unexec_init_emacs_zone ();
#endif

821
  sort_args (argc, argv);
822 823
  argc = 0;
  while (argv[argc]) argc++;
824

825 826 827 828
  if (argmatch (argv, argc, "-version", "--version", 3, NULL, &skip_args)
      /* We don't know the version number unless this is a dumped Emacs.
         So ignore --version otherwise.  */
      && initialized)
829
    {
830
      Lisp_Object tem, tem2;
831
      tem = Fsymbol_value (intern ("emacs-version"));
832
      tem2 = Fsymbol_value (intern ("emacs-copyright"));
833 834 835 836 837
      if (!STRINGP (tem))
	{
	  fprintf (stderr, "Invalid value of `emacs-version'\n");
	  exit (1);
	}
838 839 840 841 842
      if (!STRINGP (tem2))
	{
	  fprintf (stderr, "Invalid value of `emacs-copyright'\n");
	  exit (1);
	}
843 844
      else
	{
845
	  printf ("GNU Emacs %s\n", SDATA (tem));
846
	  printf ("%s\n", SDATA(tem2));
847 848 849 850
	  printf ("GNU Emacs comes with ABSOLUTELY NO WARRANTY.\n");
	  printf ("You may redistribute copies of Emacs\n");
	  printf ("under the terms of the GNU General Public License.\n");
	  printf ("For more information about these matters, ");
Karl Heuer's avatar
Karl Heuer committed
851
	  printf ("see the file named COPYING.\n");
852 853 854 855
	  exit (0);
	}
    }

856 857 858 859 860 861 862 863 864 865 866 867
#ifdef HAVE_PERSONALITY_LINUX32
  /* See if there is a gap between the end of BSS and the heap.
     In that case, set personality and exec ourself again.  */
  if (!initialized
      && (strcmp (argv[argc-1], "dump") == 0
          || strcmp (argv[argc-1], "bootstrap") == 0)
      && heap_bss_diff > MAX_HEAP_BSS_DIFF)
    {
      if (! getenv ("EMACS_HEAP_EXEC"))
        {
          /* Set this so we only do this once.  */
          putenv("EMACS_HEAP_EXEC=true");
868 869 870 871 872 873 874

	  /* A flag to turn off address randomization which is introduced
	   in linux kernel shipped with fedora core 4 */
#define ADD_NO_RANDOMIZE 0x0040000
	  personality (PER_LINUX32 | ADD_NO_RANDOMIZE);
#undef  ADD_NO_RANDOMIZE

875 876 877 878 879 880 881 882 883
          execvp (argv[0], argv);

          /* If the exec fails, try to dump anyway.  */
          perror ("execvp");
        }
    }
#endif /* HAVE_PERSONALITY_LINUX32 */


Jim Blandy's avatar
Jim Blandy committed
884 885
/* Map in shared memory, if we are using that.  */
#ifdef HAVE_SHM
886
  if (argmatch (argv, argc, "-nl", "--no-shared-memory", 6, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
887 888 889 890 891 892 893 894 895 896 897 898 899
    {
      map_in_data (0);
      /* The shared memory was just restored, which clobbered this.  */
      skip_args = 1;
    }
  else
    {
      map_in_data (1);
      /* The shared memory was just restored, which clobbered this.  */
      skip_args = 0;
    }
#endif

900
#if defined (HAVE_SETRLIMIT) && defined (RLIMIT_STACK)
901 902 903 904 905 906 907 908
  /* Extend the stack space available.
     Don't do that if dumping, since some systems (e.g. DJGPP)
     might define a smaller stack limit at that time.  */
  if (1
#ifndef CANNOT_DUMP
      && (!noninteractive || initialized)
#endif
      && !getrlimit (RLIMIT_STACK, &rlim))
909
    {
910
      long newlim;
911
      extern size_t re_max_failures;
912 913 914 915 916 917 918 919
      /* Approximate the amount regex.c needs per unit of re_max_failures.  */
      int ratio = 20 * sizeof (char *);
      /* Then add 33% to cover the size of the smaller stacks that regex.c
	 successively allocates and discards, on its way to the maximum.  */
      ratio += ratio / 3;
      /* Add in some extra to cover
	 what we're likely to use for other reasons.  */
      newlim = re_max_failures * ratio + 200000;
920 921 922 923 924 925 926
#ifdef __NetBSD__
      /* NetBSD (at least NetBSD 1.2G and former) has a bug in its
       stack allocation routine for new process that the allocation
       fails if stack limit is not on page boundary.  So, round up the
       new limit to page boundary.  */
      newlim = (newlim + getpagesize () - 1) / getpagesize () * getpagesize();
#endif
927
      if (newlim > rlim.rlim_max)
928 929
	{
	  newlim = rlim.rlim_max;
930 931
	  /* Don't let regex.c overflow the stack we have.  */
	  re_max_failures = (newlim - 200000) / ratio;
932
	}
933 934 935
      if (rlim.rlim_cur < newlim)
	rlim.rlim_cur = newlim;

936 937
      setrlimit (RLIMIT_STACK, &rlim);
    }
938
#endif /* HAVE_SETRLIMIT and RLIMIT_STACK */
939

Jim Blandy's avatar
Jim Blandy committed
940 941 942 943
  /* Record (approximately) where the stack begins.  */
  stack_bottom = &stack_bottom_variable;

  clearerr (stdin);
944

Jim Blandy's avatar
Jim Blandy committed
945
#ifndef SYSTEM_MALLOC
946 947
  /* Arrange to get warning messages as memory fills up.  */
  memory_warnings (0, malloc_warning);
948

949 950 951
  /* Call malloc at least once, to run the initial __malloc_hook.
     Also call realloc and free for consistency.  */
  free (realloc (malloc (4), 4));
952

953
# ifndef SYNC_INPUT
954 955
  /* Arrange to disable interrupt input inside malloc etc.  */
  uninterrupt_malloc ();
956
# endif /* not SYNC_INPUT */
Jim Blandy's avatar
Jim Blandy committed
957 958
#endif	/* not SYSTEM_MALLOC */

959
#ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
960
  main_thread = pthread_self ();
961
#endif /* FORWARD_SIGNAL_TO_MAIN_THREAD */
962

963
#if defined (MSDOS) || defined (WINDOWSNT)
964 965 966
  /* We do all file input/output as binary files.  When we need to translate
     newlines, we do that manually.  */
  _fmode = O_BINARY;
967
#endif /* MSDOS || WINDOWSNT */
968

969
#ifdef MSDOS
970 971 972 973 974 975 976 977 978
#if __DJGPP__ >= 2
  if (!isatty (fileno (stdin)))
    setmode (fileno (stdin), O_BINARY);
  if (!isatty (fileno (stdout)))
    {
      fflush (stdout);
      setmode (fileno (stdout), O_BINARY);
    }
#else  /* not __DJGPP__ >= 2 */
979 980 981
  (stdin)->_flag &= ~_IOTEXT;
  (stdout)->_flag &= ~_IOTEXT;
  (stderr)->_flag &= ~_IOTEXT;
982
#endif /* not __DJGPP__ >= 2 */
983 984
#endif /* MSDOS */

985
#ifdef SET_EMACS_PRIORITY
986
  if (emacs_priority)
987
    nice (emacs_priority);
Jim Blandy's avatar
Jim Blandy committed
988
  setuid (getuid ());
989
#endif /* SET_EMACS_PRIORITY */
Jim Blandy's avatar
Jim Blandy committed
990

991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004
  /* Skip initial setlocale if LC_ALL is "C", as it's not needed in that case.
     The build procedure uses this while dumping, to ensure that the
     dumped Emacs does not have its system locale tables initialized,
     as that might cause screwups when the dumped Emacs starts up.  */
  {
    char *lc_all = getenv ("LC_ALL");
    do_initial_setlocale = ! lc_all || strcmp (lc_all, "C");
  }

  /* Set locale now, so that initial error messages are localized properly.
     fixup_locale must wait until later, since it builds strings.  */
  if (do_initial_setlocale)
    setlocale (LC_ALL, "");

Jim Blandy's avatar
Jim Blandy committed
1005 1006
  inhibit_window_system = 0;

Pavel Janík's avatar
Pavel Janík committed
1007
  /* Handle the -t switch, which specifies filename to use as terminal.  */
1008 1009 1010 1011 1012 1013
  while (1)
    {
      char *term;
      if (argmatch (argv, argc, "-t", "--terminal", 4, &term, &skip_args))
	{
	  int result;
1014 1015 1016
	  emacs_close (0);
	  emacs_close (1);
	  result = emacs_open (term, O_RDWR, 0);
1017 1018 1019
	  if (result < 0)
	    {
	      char *errstring = strerror (errno);
1020
	      fprintf (stderr, "%s: %s: %s\n", argv[0], term, errstring);
1021 1022 1023 1024 1025
	      exit (1);
	    }
	  dup (0);
	  if (! isatty (0))
	    {
1026
	      fprintf (stderr, "%s: %s: not a tty\n", argv[0], term);
1027 1028 1029
	      exit (1);
	    }
	  fprintf (stderr, "Using %s\n", term);
1030
#ifdef HAVE_WINDOW_SYSTEM
1031
	  inhibit_window_system = 1; /* -t => -nw */
Jim Blandy's avatar
Jim Blandy committed
1032
#endif
1033 1034 1035 1036 1037
	}
      else
	break;
    }

1038 1039 1040 1041
  /* Command line option --no-windows is deprecated and thus not mentioned
     in the manual and usage informations.  */
  if (argmatch (argv, argc, "-nw", "--no-window-system", 6, NULL, &skip_args)
      || argmatch (argv, argc, "-nw", "--no-windows", 6, NULL, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
1042
    inhibit_window_system = 1;
Jim Blandy's avatar
Jim Blandy committed
1043

Karl Heuer's avatar
Karl Heuer committed
1044
  /* Handle the -batch switch, which means don't do interactive display.  */
Jim Blandy's avatar
Jim Blandy committed
1045
  noninteractive = 0;
1046
  if (argmatch (argv, argc, "-batch", "--batch", 5, NULL, &skip_args))
1047 1048 1049 1050
    {
      noninteractive = 1;
      Vundo_outer_limit = Qnil;
    }
Richard M. Stallman's avatar
Richard M. Stallman committed
1051 1052 1053
  if (argmatch (argv, argc, "-script", "--script", 3, &junk, &skip_args))
    {
      noninteractive = 1;	/* Set batch mode.  */
Glenn Morris's avatar
Glenn Morris committed
1054
      /* Convert --script to -scriptload, un-skip it, and sort again
1055
	 so that it will be handled in proper sequence.  */
1056
      /* FIXME broken for --script=FILE - is that supposed to work?  */
Glenn Morris's avatar
Glenn Morris committed
1057
      argv[skip_args - 1] = "-scriptload";
Richard M. Stallman's avatar
Richard M. Stallman committed
1058 1059 1060
      skip_args -= 2;
      sort_args (argc, argv);
    }
Karl Heuer's avatar
Karl Heuer committed
1061

Pavel Janík's avatar
Pavel Janík committed
1062
  /* Handle the --help option, which gives a usage message.  */
1063
  if (argmatch (argv, argc, "-help", "--help", 3, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
1064
    {
Kenichi Handa's avatar
Kenichi Handa committed
1065 1066 1067
      printf (USAGE1, argv[0], USAGE2);
      printf (USAGE3);
      printf (USAGE4, bug_reporting_address ());
Karl Heuer's avatar
Karl Heuer committed
1068
      exit (0);
Jim Blandy's avatar
Jim Blandy committed
1069 1070
    }

1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082
  if (! noninteractive)
    {
#ifdef BSD_PGRPS
      if (initialized)
	{
	  inherited_pgroup = EMACS_GETPGRP (0);
	  setpgrp (0, getpid ());
	}
#else
#if defined (USG5) && defined (INTERRUPT_INPUT)
      setpgrp ();
#endif
1083 1084 1085 1086 1087 1088 1089
#endif
#if defined (HAVE_GTK_AND_PTHREAD) && !defined (SYSTEM_MALLOC) && !defined (DOUG_LEA_MALLOC)
      {
	extern void malloc_enable_thread P_ ((void));

	malloc_enable_thread ();
      }
1090 1091 1092
#endif
    }

Jim Blandy's avatar
Jim Blandy committed
1093 1094
  init_signals ();

1095 1096 1097 1098 1099 1100 1101
  /* Don't catch SIGHUP if dumping.  */
  if (1
#ifndef CANNOT_DUMP
      && initialized
#endif
      )
    {
1102
      sigblock (sigmask (SIGHUP));
1103 1104 1105 1106 1107
      /* In --batch mode, don't catch SIGHUP if already ignored.
	 That makes nohup work.  */
      if (! noninteractive
	  || signal (SIGHUP, SIG_IGN) != SIG_IGN)
	signal (SIGHUP, fatal_error_signal);
1108
      sigunblock (sigmask (SIGHUP));
1109 1110
    }

Jim Blandy's avatar
Jim Blandy committed
1111 1112 1113 1114 1115 1116 1117 1118
  if (
#ifndef CANNOT_DUMP
      ! noninteractive || initialized
#else
      1
#endif
      )
    {
1119
      /* Don't catch these signals in batch mode if dumping.
Jim Blandy's avatar
Jim Blandy committed
1120 1121 1122 1123 1124
	 On some machines, this sets static data that would make
	 signal fail to work right when the dumped Emacs is run.  */
      signal (SIGQUIT, fatal_error_signal);
      signal (SIGILL, fatal_error_signal);
      signal (SIGTRAP, fatal_error_signal);
1125
#ifdef SIGUSR1
1126
      add_user_signal (SIGUSR1, "sigusr1");
1127
#endif
1128
#ifdef SIGUSR2
1129
      add_user_signal (SIGUSR2, "sigusr2");
1130
#endif
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151
#ifdef SIGABRT
      signal (SIGABRT, fatal_error_signal);
#endif
#ifdef SIGHWE
      signal (SIGHWE, fatal_error_signal);
#endif
#ifdef SIGPRE
      signal (SIGPRE, fatal_error_signal);
#endif
#ifdef SIGORE
      signal (SIGORE, fatal_error_signal);
#endif
#ifdef SIGUME
      signal (SIGUME, fatal_error_signal);
#endif
#ifdef SIGDLK
      signal (SIGDLK, fatal_error_signal);
#endif
#ifdef SIGCPULIM
      signal (SIGCPULIM, fatal_error_signal);
#endif
1152 1153
#ifdef SIGIOT
      /* This is missing on some systems - OS/2, for example.  */
Jim Blandy's avatar
Jim Blandy committed
1154
      signal (SIGIOT, fatal_error_signal);
1155
#endif
Jim Blandy's avatar
Jim Blandy committed
1156 1157 1158 1159
#ifdef SIGEMT
      signal (SIGEMT, fatal_error_signal);
#endif
      signal (SIGFPE, fatal_error_signal);
1160
#ifdef SIGBUS
Jim Blandy's avatar
Jim Blandy committed
1161
      signal (SIGBUS, fatal_error_signal);
1162
#endif
Jim Blandy's avatar
Jim Blandy committed
1163
      signal (SIGSEGV, fatal_error_signal);
1164
#ifdef SIGSYS
Jim Blandy's avatar
Jim Blandy committed
1165
      signal (SIGSYS, fatal_error_signal);
1166
#endif
Jim Blandy's avatar
Jim Blandy committed
1167 1168 1169 1170 1171 1172 1173 1174
      signal (SIGTERM, fatal_error_signal);
#ifdef SIGXCPU
      signal (SIGXCPU, fatal_error_signal);
#endif
#ifdef SIGXFSZ
      signal (SIGXFSZ, fatal_error_signal);
#endif /* SIGXFSZ */

1175 1176 1177 1178 1179
#ifdef SIGDANGER
      /* This just means available memory is getting low.  */
      signal (SIGDANGER, memory_warning_signal);
#endif

Jim Blandy's avatar
Jim Blandy committed
1180
#ifdef AIX
1181 1182
/* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU.  */
      signal (SIGXCPU, fatal_error_signal);
1183
#ifndef _I386
Jim Blandy's avatar
Jim Blandy committed
1184
      signal (SIGIOINT, fatal_error_signal);
1185
#endif