emacs.c 39.1 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* Fully extensible Emacs, running on Unix, intended for GNU.
Karl Heuer's avatar
Karl Heuer committed
2
   Copyright (C) 1985, 86, 87, 93, 94, 95 Free Software Foundation, Inc.
Jim Blandy's avatar
Jim Blandy committed
3 4 5 6 7

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
8
the Free Software Foundation; either version 2, or (at your option)
Jim Blandy's avatar
Jim Blandy committed
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
any later version.

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
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */


#include <signal.h>
#include <errno.h>

24
#include <config.h>
Jim Blandy's avatar
Jim Blandy committed
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
#include <stdio.h>

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

#ifdef VMS
#include <ssdef.h>
#endif

#ifdef BSD
#include <sys/ioctl.h>
#endif

#include "lisp.h"
#include "commands.h"
Joseph Arceneaux's avatar
Joseph Arceneaux committed
40
#include "intervals.h"
Jim Blandy's avatar
Jim Blandy committed
41

42
#include "systty.h"
43
#include "syssignal.h"
Richard M. Stallman's avatar
Richard M. Stallman committed
44
#include "process.h"
Jim Blandy's avatar
Jim Blandy committed
45

Jim Blandy's avatar
Jim Blandy committed
46 47 48 49
#ifndef O_RDWR
#define O_RDWR 2
#endif

50
extern void malloc_warning ();
51
extern void set_time_zone_rule ();
52 53 54
extern char *index ();
extern char *strerror ();

Jim Blandy's avatar
Jim Blandy committed
55 56 57
/* Command line args from shell, as list of strings */
Lisp_Object Vcommand_line_args;

58 59 60 61
/* The name under which Emacs was invoked, with any leading directory
   names discarded.  */
Lisp_Object Vinvocation_name;

62 63 64
/* The directory name from which Emacs was invoked.  */
Lisp_Object Vinvocation_directory;

65 66 67 68
/* 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
69 70 71
/* Hook run by `kill-emacs' before it does really anything.  */
Lisp_Object Vkill_emacs_hook;

Jim Blandy's avatar
Jim Blandy committed
72 73 74 75 76
/* Set nonzero after Emacs has started up the first time.
  Prevents reinitialization of the Lisp world and keymaps
  on subsequent starts.  */
int initialized;

77
/* Variable whose value is symbol giving operating system type.  */
Jim Blandy's avatar
Jim Blandy committed
78
Lisp_Object Vsystem_type;
79 80 81

/* Variable whose value is string giving configuration built for.  */
Lisp_Object Vsystem_configuration;
82 83 84 85 86

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

Jim Blandy's avatar
Jim Blandy committed
87 88 89 90
/* If non-zero, emacs should not attempt to use an window-specific code,
   but instead should use the virtual terminal under which it was started */
int inhibit_window_system;

91 92 93
/* 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
   priority; Those functions have their own extern declaration.  */
94 95
int emacs_priority;

96 97 98 99
/* 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. */
int running_asynch_code;

100
#ifdef BSD_PGRPS
101 102 103 104
/* See sysdep.c.  */
extern int inherited_pgroup;
#endif

Jim Blandy's avatar
Jim Blandy committed
105 106 107 108 109 110 111 112 113
#ifdef HAVE_X_WINDOWS
/* If non-zero, -d was specified, meaning we're using some window system. */
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;

114
#ifdef HAVE_WINDOW_SYSTEM
Jim Blandy's avatar
Jim Blandy committed
115
extern Lisp_Object Vwindow_system;
116
#endif /* HAVE_WINDOW_SYSTEM */
Jim Blandy's avatar
Jim Blandy committed
117

118 119
extern Lisp_Object Vauto_save_list_file_name;

Jim Blandy's avatar
Jim Blandy committed
120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135
#ifdef USG_SHARED_LIBRARIES
/* If nonzero, this is the place to put the end of the writable segment
   at startup.  */

unsigned int bss_end = 0;
#endif

/* 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;
136 137 138 139

/* Save argv and argc.  */
char **initial_argv;
int initial_argc;
140 141

static void sort_args ();
Jim Blandy's avatar
Jim Blandy committed
142 143 144 145 146 147 148 149

/* Signal code for the fatal signal that was received */
int fatal_error_code;

/* Nonzero if handling a fatal error already */
int fatal_error_in_progress;

/* Handle bus errors, illegal instruction, etc. */
Jim Blandy's avatar
Jim Blandy committed
150
SIGTYPE
Jim Blandy's avatar
Jim Blandy committed
151 152 153 154 155 156
fatal_error_signal (sig)
     int sig;
{
  fatal_error_code = sig;
  signal (sig, SIG_DFL);

157 158
  TOTALLY_UNBLOCK_INPUT;

Jim Blandy's avatar
Jim Blandy committed
159
  /* If fatal error occurs in code below, avoid infinite recursion.  */
160 161 162
  if (! fatal_error_in_progress)
    {
      fatal_error_in_progress = 1;
Jim Blandy's avatar
Jim Blandy committed
163

164
      shut_down_emacs (sig, 0, Qnil);
165
    }
Jim Blandy's avatar
Jim Blandy committed
166 167 168 169

#ifdef VMS
  LIB$STOP (SS$_ABORT);
#else
170 171 172 173
  /* 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.  */
174
#ifndef MSDOS
175
  sigunblock (sigmask (fatal_error_code));
176
#endif
Jim Blandy's avatar
Jim Blandy committed
177 178 179
  kill (getpid (), fatal_error_code);
#endif /* not VMS */
}
180 181 182

#ifdef SIGDANGER

Richard M. Stallman's avatar
Richard M. Stallman committed
183
/* Handler for SIGDANGER.  */
184 185 186 187 188 189 190
SIGTYPE
memory_warning_signal (sig)
     int sig;
{
  signal (sig, memory_warning_signal);

  malloc_warning ("Operating system warns that virtual memory is running low.\n");
191 192 193

  /* It might be unsafe to call do_auto_save now.  */
  force_auto_save_soon ();
194 195
}
#endif
Jim Blandy's avatar
Jim Blandy committed
196 197 198 199 200 201 202 203 204 205

/* Code for dealing with Lisp access to the Unix command line */

static
init_cmdargs (argc, argv, skip_args)
     int argc;
     char **argv;
     int skip_args;
{
  register int i;
206
  Lisp_Object name, dir;
Jim Blandy's avatar
Jim Blandy committed
207

208 209 210
  initial_argv = argv;
  initial_argc = argc;

211
  Vinvocation_name = Ffile_name_nondirectory (build_string (argv[0]));
212 213 214 215 216 217 218
  Vinvocation_directory = Ffile_name_directory (build_string (argv[0]));
  /* 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,
Richard M. Stallman's avatar
Richard M. Stallman committed
219
		       EXEC_SUFFIXES, &found, 1);
220
      if (yes == 1)
221 222
	Vinvocation_directory = Ffile_name_directory (found);
    }
223

224 225 226 227 228
  if (!NILP (Vinvocation_directory)
      && NILP (Ffile_name_absolute_p (Vinvocation_directory)))
    /* Emacs was started with relative path, like ./emacs  */
    Vinvocation_directory = Fexpand_file_name (Vinvocation_directory, Qnil);

229 230 231 232 233 234 235 236
  Vinstallation_directory = Qnil;

  if (!NILP (Vinvocation_directory))
    {
      dir = Vinvocation_directory;
      name = Fexpand_file_name (Vinvocation_name, dir);
      while (1)
	{
237
	  Lisp_Object tem, lib_src_exists;
238 239
	  Lisp_Object etc_exists, info_exists;

240 241 242 243 244 245
	  /* 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);
	  if (!NILP (lib_src_exists))
246
	    {
247 248 249
	      tem = Fexpand_file_name (build_string ("etc"), dir);
	      etc_exists = Ffile_exists_p (tem);
	      if (!NILP (etc_exists))
250
		{
251 252 253
		  Vinstallation_directory
		    = Ffile_name_as_directory (dir);
		  break;
254 255 256 257
		}
	    }

	  /* See if dir's parent contains those subdirs.  */
258 259 260
	  tem = Fexpand_file_name (build_string ("../lib-src"), dir);
	  lib_src_exists = Ffile_exists_p (tem);
	  if (!NILP (lib_src_exists))
261
	    {
262 263 264
	      tem = Fexpand_file_name (build_string ("../etc"), dir);
	      etc_exists = Ffile_exists_p (tem);
	      if (!NILP (etc_exists))
265
		{
266 267 268 269
		  tem = Fexpand_file_name (build_string (".."), dir);
		  Vinstallation_directory
		    = Ffile_name_as_directory (tem);
		  break;
270 271 272 273 274 275 276 277
		}
	    }

	  /* 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))
	    {
278
	      name = Fexpand_file_name (tem, dir);
279 280 281 282 283 284 285
	      dir = Ffile_name_directory (name);
	    }
	  else
	    break;
	}
    }

Jim Blandy's avatar
Jim Blandy committed
286 287 288 289 290 291 292 293 294
  Vcommand_line_args = Qnil;

  for (i = argc - 1; i >= 0; i--)
    {
      if (i == 0 || i > skip_args)
	Vcommand_line_args
	  = Fcons (build_string (argv[i]), Vcommand_line_args);
    }
}
295 296 297 298 299 300 301 302 303

DEFUN ("invocation-name", Finvocation_name, Sinvocation_name, 0, 0, 0,
  "Return the program name that was used to run Emacs.\n\
Any directory names are omitted.")
  ()
{
  return Fcopy_sequence (Vinvocation_name);
}

304 305 306 307 308 309 310 311
DEFUN ("invocation-directory", Finvocation_directory, Sinvocation_directory,
  0, 0, 0,
  "Return the directory name in which the Emacs executable was located")
  ()
{
  return Fcopy_sequence (Vinvocation_directory);
}

Jim Blandy's avatar
Jim Blandy committed
312 313 314

#ifdef VMS
#ifdef LINK_CRTL_SHARE
315
#ifdef SHARABLE_LIB_BUG
Jim Blandy's avatar
Jim Blandy committed
316
extern noshare char **environ;
317
#endif /* SHARABLE_LIB_BUG */
Jim Blandy's avatar
Jim Blandy committed
318 319 320
#endif /* LINK_CRTL_SHARE */
#endif /* VMS */

321 322 323 324 325 326
#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

327
#ifndef ORDINARY_LINK
328 329 330 331 332
/* 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__
333
#ifndef GCC_CTORS_IN_LIBC
334
__do_global_ctors ()
335
{}
336 337
__do_global_ctors_aux ()
{}
338 339
__do_global_dtors ()
{}
340 341
/* Linux has a bug in its library; avoid an error.  */
#ifndef LINUX
342
char * __CTOR_LIST__[2] = { (char *) (-1), 0 };
343
#endif
344
char * __DTOR_LIST__[2] = { (char *) (-1), 0 };
345
#endif /* GCC_CTORS_IN_LIBC */
346
__main ()
347 348
{}
#endif /* __GNUC__ */
349
#endif /* ORDINARY_LINK */
350

Karl Heuer's avatar
Karl Heuer committed
351 352 353 354 355 356 357 358 359
/* 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.  */
360

Karl Heuer's avatar
Karl Heuer committed
361
static int
362
argmatch (argv, argc, sstr, lstr, minlen, valptr, skipptr)
Karl Heuer's avatar
Karl Heuer committed
363
     char **argv;
364
     int argc;
Karl Heuer's avatar
Karl Heuer committed
365 366 367 368 369 370 371 372
     char *sstr;
     char *lstr;
     int minlen;
     char **valptr;
     int *skipptr;
{
  char *p;
  int arglen;
373 374 375 376 377 378 379
  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
380 381 382 383 384 385 386 387 388 389 390 391 392 393 394
  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));
395
  if (lstr == 0 || arglen < minlen || strncmp (arg, lstr, arglen) != 0)
Karl Heuer's avatar
Karl Heuer committed
396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419
    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;
    }
}

Jim Blandy's avatar
Jim Blandy committed
420 421 422 423 424 425 426 427 428 429 430
/* ARGSUSED */
main (argc, argv, envp)
     int argc;
     char **argv;
     char **envp;
{
  char stack_bottom_variable;
  int skip_args = 0;
  extern int errno;
  extern sys_nerr;

431 432 433 434
#ifdef LINUX_SBRK_BUG
  __sbrk (1);
#endif

435 436
  sort_args (argc, argv);

437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452
  if (argmatch (argv, argc, "-version", "--version", 3, NULL, &skip_args))
    {
      Lisp_Object tem;
      tem = Fsymbol_value (intern ("emacs-version"));
      if (!STRINGP (tem))
	{
	  fprintf (stderr, "Invalid value of `emacs-version'\n");
	  exit (1);
	}
      else
	{
	  printf ("%s\n", XSTRING (tem)->data);
	  exit (0);
	}
    }

Jim Blandy's avatar
Jim Blandy committed
453 454
/* Map in shared memory, if we are using that.  */
#ifdef HAVE_SHM
455
  if (argmatch (argv, argc, "-nl", "--no-shared-memory", 6, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
456 457 458 459 460 461 462 463 464 465 466 467 468
    {
      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

469
#ifdef NeXT
470 471 472 473 474 475 476
  {
    extern int malloc_cookie;
    /* This helps out unexnext.c.  */
    if (initialized)
      if (malloc_jumpstart (malloc_cookie) != 0)
	printf ("malloc jumpstart failed!\n");
  }
477 478
#endif /* NeXT */

Jim Blandy's avatar
Jim Blandy committed
479 480
#ifdef VMS
  /* If -map specified, map the data file in */
Karl Heuer's avatar
Karl Heuer committed
481 482
  {
    char *file;
483
    if (argmatch (argv, argc, "-map", "--map-data", 3, &mapin_file, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
484 485
      mapin_data (file);
  }
Jim Blandy's avatar
Jim Blandy committed
486 487

#ifdef LINK_CRTL_SHARE
488
#ifdef SHARABLE_LIB_BUG
Jim Blandy's avatar
Jim Blandy committed
489 490 491 492 493 494 495 496 497
  /* Bletcherous shared libraries! */
  if (!stdin)
    stdin = fdopen (0, "r");
  if (!stdout)
    stdout = fdopen (1, "w");
  if (!stderr)
    stderr = fdopen (2, "w");
  if (!environ)
    environ = envp;
498
#endif /* SHARABLE_LIB_BUG */
Jim Blandy's avatar
Jim Blandy committed
499 500 501 502 503 504 505 506 507 508 509 510 511
#endif /* LINK_CRTL_SHARE */
#endif /* VMS */

  /* Record (approximately) where the stack begins.  */
  stack_bottom = &stack_bottom_variable;

#ifdef RUN_TIME_REMAP
  if (initialized)
    run_time_remap (argv[0]);
#endif

#ifdef USG_SHARED_LIBRARIES
  if (bss_end)
512
    brk ((void *)bss_end);
Jim Blandy's avatar
Jim Blandy committed
513 514 515
#endif

  clearerr (stdin);
516

Jim Blandy's avatar
Jim Blandy committed
517 518
#ifndef SYSTEM_MALLOC
  if (! initialized)
519 520 521 522 523 524 525 526
    {
      /* Arrange to get warning messages as memory fills up.  */
      memory_warnings (0, malloc_warning);

      /* Arrange to disable interrupt input while malloc and friends are
	 running.  */
      uninterrupt_malloc ();
    }
Jim Blandy's avatar
Jim Blandy committed
527 528
#endif	/* not SYSTEM_MALLOC */

529 530 531 532 533 534 535 536 537
#ifdef MSDOS
  /* We do all file input/output as binary files.  When we need to translate
     newlines, we do that manually.  */
  _fmode = O_BINARY;
  (stdin)->_flag &= ~_IOTEXT;
  (stdout)->_flag &= ~_IOTEXT;
  (stderr)->_flag &= ~_IOTEXT;
#endif /* MSDOS */

538
#ifdef SET_EMACS_PRIORITY
539
  if (emacs_priority)
540
    nice (emacs_priority);
Jim Blandy's avatar
Jim Blandy committed
541
  setuid (getuid ());
542
#endif /* SET_EMACS_PRIORITY */
Jim Blandy's avatar
Jim Blandy committed
543

544
#ifdef EXTRA_INITIALIZE
545
  EXTRA_INITIALIZE;
546 547
#endif

Jim Blandy's avatar
Jim Blandy committed
548 549
  inhibit_window_system = 0;

Jim Blandy's avatar
Jim Blandy committed
550
  /* Handle the -t switch, which specifies filename to use as terminal */
Karl Heuer's avatar
Karl Heuer committed
551 552
  {
    char *term;
553
    if (argmatch (argv, argc, "-t", "--terminal", 4, &term, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571
      {
	int result;
	close (0);
	close (1);
	result = open (term, O_RDWR, 2 );
	if (result < 0)
	  {
	    char *errstring = strerror (errno);
	    fprintf (stderr, "emacs: %s: %s\n", term, errstring);
	    exit (1);
	  }
	dup (0);
	if (! isatty (0))
	  {
	    fprintf (stderr, "emacs: %s: not a tty\n", term);
	    exit (1);
	  }
	fprintf (stderr, "Using %s\n", term);
572
#ifdef HAVE_WINDOW_SYSTEM
Karl Heuer's avatar
Karl Heuer committed
573
	inhibit_window_system = 1; /* -t => -nw */
Jim Blandy's avatar
Jim Blandy committed
574
#endif
Karl Heuer's avatar
Karl Heuer committed
575 576
      }
  }
577
  if (argmatch (argv, argc, "-nw", "--no-windows", 6, NULL, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
578
    inhibit_window_system = 1;
Jim Blandy's avatar
Jim Blandy committed
579

Karl Heuer's avatar
Karl Heuer committed
580
  /* Handle the -batch switch, which means don't do interactive display.  */
Jim Blandy's avatar
Jim Blandy committed
581
  noninteractive = 0;
582
  if (argmatch (argv, argc, "-batch", "--batch", 5, NULL, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
583 584 585
    noninteractive = 1;

  /* Handle the --help option, which gives a usage message..  */
586
  if (argmatch (argv, argc, "-help", "--help", 3, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
587
    {
Karl Heuer's avatar
Karl Heuer committed
588 589 590
      printf ("\
Usage: %s [-t term] [--terminal term]  [-nw] [--no-windows]  [--batch]\n\
      [-q] [--no-init-file]  [-u user] [--user user]  [--debug-init]\n\
Karl Heuer's avatar
Karl Heuer committed
591
      [--version] [--no-site-file]\n\
Karl Heuer's avatar
Karl Heuer committed
592
      [-f func] [--funcall func]  [-l file] [--load file]  [--insert file]\n\
Karl Heuer's avatar
Karl Heuer committed
593
      [+linenum] file-to-visit  [--kill]\n", argv[0]);
Karl Heuer's avatar
Karl Heuer committed
594
      exit (0);
Jim Blandy's avatar
Jim Blandy committed
595 596
    }

597 598 599 600 601 602 603 604 605 606
#ifdef HAVE_X_WINDOWS
  /* Stupid kludge to catch command-line display spec.  We can't
     handle this argument entirely in window system dependent code
     because we don't even know which window system dependent code
     to run until we've recognized this argument.  */
  {
    char *displayname;
    int i;
    int count_before = skip_args;

607
    if (argmatch (argv, argc, "-d", "--display", 3, &displayname, &skip_args))
608
      display_arg = 1;
609
    else if (argmatch (argv, argc, "-display", 0, 3, &displayname, &skip_args))
610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628
      display_arg = 1;

    /* If we have the form --display=NAME,
       convert it into  -d name.
       This requires inserting a new element into argv.  */
    if (displayname != 0 && skip_args - count_before == 1)
      {
	char **new = (char **) xmalloc (sizeof (char *) * (argc + 2));
	int j;

	for (j = 0; j < count_before + 1; j++)
	  new[j] = argv[j];
	new[count_before + 1] = "-d";
	new[count_before + 2] = displayname;
	for (j = count_before + 2; j <argc; j++)
	  new[j + 1] = argv[j];
	argv = new;
	argc++;
      }
629 630 631
    /* Change --display to -d, when its arg is separate.  */
    else if (displayname != 0 && skip_args > count_before
	     && argv[count_before + 1][1] == '-')
632
      argv[count_before + 1] = "-d";
633 634 635 636 637 638

    /* Don't actually discard this arg.  */
    skip_args = count_before;
  }
#endif

639 640 641 642 643 644 645 646 647 648 649 650 651 652 653
  if (! noninteractive)
    {
#ifdef BSD_PGRPS
      if (initialized)
	{
	  inherited_pgroup = EMACS_GETPGRP (0);
	  setpgrp (0, getpid ());
	}
#else
#if defined (USG5) && defined (INTERRUPT_INPUT)
      setpgrp ();
#endif
#endif
    }

Jim Blandy's avatar
Jim Blandy committed
654 655 656 657
#ifdef POSIX_SIGNALS
  init_signals ();
#endif

658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673
  /* Don't catch SIGHUP if dumping.  */
  if (1
#ifndef CANNOT_DUMP
      && initialized
#endif
      )
    {
      sigblockx (SIGHUP);
      /* 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);
      sigunblockx (SIGHUP);
    }

Jim Blandy's avatar
Jim Blandy committed
674 675 676 677 678 679 680 681
  if (
#ifndef CANNOT_DUMP
      ! noninteractive || initialized
#else
      1
#endif
      )
    {
682
      /* Don't catch these signals in batch mode if dumping.
Jim Blandy's avatar
Jim Blandy committed
683 684 685 686 687
	 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);
688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708
#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
709 710
#ifdef SIGIOT
      /* This is missing on some systems - OS/2, for example.  */
Jim Blandy's avatar
Jim Blandy committed
711
      signal (SIGIOT, fatal_error_signal);
712
#endif
Jim Blandy's avatar
Jim Blandy committed
713 714 715 716
#ifdef SIGEMT
      signal (SIGEMT, fatal_error_signal);
#endif
      signal (SIGFPE, fatal_error_signal);
717
#ifdef SIGBUS
Jim Blandy's avatar
Jim Blandy committed
718
      signal (SIGBUS, fatal_error_signal);
719
#endif
Jim Blandy's avatar
Jim Blandy committed
720
      signal (SIGSEGV, fatal_error_signal);
721
#ifdef SIGSYS
Jim Blandy's avatar
Jim Blandy committed
722
      signal (SIGSYS, fatal_error_signal);
723
#endif
Jim Blandy's avatar
Jim Blandy committed
724 725 726 727 728 729 730 731
      signal (SIGTERM, fatal_error_signal);
#ifdef SIGXCPU
      signal (SIGXCPU, fatal_error_signal);
#endif
#ifdef SIGXFSZ
      signal (SIGXFSZ, fatal_error_signal);
#endif /* SIGXFSZ */

732 733 734 735 736
#ifdef SIGDANGER
      /* This just means available memory is getting low.  */
      signal (SIGDANGER, memory_warning_signal);
#endif

Jim Blandy's avatar
Jim Blandy committed
737
#ifdef AIX
738 739
/* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU.  */
      signal (SIGXCPU, fatal_error_signal);
740
#ifndef _I386
Jim Blandy's avatar
Jim Blandy committed
741
      signal (SIGIOINT, fatal_error_signal);
742
#endif
Jim Blandy's avatar
Jim Blandy committed
743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770
      signal (SIGGRANT, fatal_error_signal);
      signal (SIGRETRACT, fatal_error_signal);
      signal (SIGSOUND, fatal_error_signal);
      signal (SIGMSG, fatal_error_signal);
#endif /* AIX */
    }

  noninteractive1 = noninteractive;

/* Perform basic initializations (not merely interning symbols) */

  if (!initialized)
    {
      init_alloc_once ();
      init_obarray ();
      init_eval_once ();
      init_syntax_once ();	/* Create standard syntax table.  */
		      /* Must be done before init_buffer */
      init_casetab_once ();
      init_buffer_once ();	/* Create buffer table and some buffers */
      init_minibuf_once ();	/* Create list of minibuffers */
			      /* Must precede init_window_once */
      init_window_once ();	/* Init the window system */
    }

  init_alloc ();
  init_eval ();
  init_data ();
771
  running_asynch_code = 0;
772

773 774 775 776 777
#ifdef MSDOS
  /* Call early 'cause init_environment needs it.  */
  init_dosfns ();
  /* Set defaults for several environment variables.  */
  if (initialized) init_environment (argc, argv, skip_args);
778
  else init_gettimeofday ();
779 780
#endif

781 782 783 784 785
#ifdef WINDOWSNT
  /* Initialize environment from registry settings.  */
  init_environment ();
#endif

786 787 788 789
  /* egetenv is a pretty low-level facility, which may get called in
     many circumstances; it seems flimsy to put off initializing it
     until calling init_callproc.  */
  set_process_environment ();
790 791 792 793 794 795
  /* AIX crashes are reported in system versions 3.2.3 and 3.2.4
     if this is not done.  Do it after set_process_environment so that we
     don't pollute Vprocess_environment.  */
#ifdef AIX
  putenv ("LANG=C");
#endif
796

797 798
  init_buffer ();	/* Init default directory of main buffer */

799
  init_callproc_1 ();	/* Must precede init_cmdargs and init_sys_modes.  */
800
  init_cmdargs (argc, argv, skip_args);	/* Must precede init_lread.  */
801
  init_callproc ();	/* Must follow init_cmdargs but not init_sys_modes.  */
Jim Blandy's avatar
Jim Blandy committed
802
  init_lread ();
Jim Blandy's avatar
Jim Blandy committed
803 804 805 806

  if (!noninteractive)
    {
#ifdef VMS
Jim Blandy's avatar
Jim Blandy committed
807
      init_vms_input ();/* init_display calls get_frame_size, that needs this */
Jim Blandy's avatar
Jim Blandy committed
808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825
#endif /* VMS */
      init_display ();	/* Determine terminal type.  init_sys_modes uses results */
    }
  init_keyboard ();	/* This too must precede init_sys_modes */
#ifdef VMS
  init_vmsproc ();	/* And this too. */
#endif /* VMS */
  init_sys_modes ();	/* Init system terminal modes (RAW or CBREAK, etc.) */
  init_xdisp ();
  init_macros ();
  init_editfns ();
#ifdef LISP_FLOAT_TYPE
  init_floatfns ();
#endif
#ifdef VMS
  init_vmsfns ();
#endif /* VMS */
  init_process ();
Jim Blandy's avatar
Jim Blandy committed
826 827 828
#ifdef CLASH_DETECTION
  init_filelock ();
#endif /* CLASH_DETECTION */
Jim Blandy's avatar
Jim Blandy committed
829 830 831 832 833 834 835 836 837 838

/* Intern the names of all standard functions and variables; define standard keys */

  if (!initialized)
    {
      /* The basic levels of Lisp must come first */
      /* And data must come first of all
	 for the sake of symbols like error-message */
      syms_of_data ();
      syms_of_alloc ();
Jim Blandy's avatar
Jim Blandy committed
839
      syms_of_lread ();
Jim Blandy's avatar
Jim Blandy committed
840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872
      syms_of_print ();
      syms_of_eval ();
      syms_of_fns ();
      syms_of_floatfns ();

      syms_of_abbrev ();
      syms_of_buffer ();
      syms_of_bytecode ();
      syms_of_callint ();
      syms_of_casefiddle ();
      syms_of_casetab ();
      syms_of_callproc ();
      syms_of_cmds ();
#ifndef NO_DIR_LIBRARY
      syms_of_dired ();
#endif /* not NO_DIR_LIBRARY */
      syms_of_display ();
      syms_of_doc ();
      syms_of_editfns ();
      syms_of_emacs ();
      syms_of_fileio ();
#ifdef CLASH_DETECTION
      syms_of_filelock ();
#endif /* CLASH_DETECTION */
      syms_of_indent ();
      syms_of_keyboard ();
      syms_of_keymap ();
      syms_of_macros ();
      syms_of_marker ();
      syms_of_minibuf ();
      syms_of_mocklisp ();
      syms_of_process ();
      syms_of_search ();
Jim Blandy's avatar
Jim Blandy committed
873
      syms_of_frame ();
Jim Blandy's avatar
Jim Blandy committed
874
      syms_of_syntax ();
Karl Heuer's avatar
Karl Heuer committed
875
      syms_of_term ();
Jim Blandy's avatar
Jim Blandy committed
876
      syms_of_undo ();
Joseph Arceneaux's avatar
Joseph Arceneaux committed
877 878 879

      /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
      syms_of_textprop ();
Jim Blandy's avatar
Jim Blandy committed
880 881 882 883 884 885
#ifdef VMS
      syms_of_vmsproc ();
#endif /* VMS */
      syms_of_window ();
      syms_of_xdisp ();
#ifdef HAVE_X_WINDOWS
Jim Blandy's avatar
Jim Blandy committed
886
      syms_of_xterm ();
Jim Blandy's avatar
Jim Blandy committed
887
      syms_of_xfns ();
888
      syms_of_xfaces ();
Jim Blandy's avatar
Jim Blandy committed
889 890 891
#ifdef HAVE_X11
      syms_of_xselect ();
#endif
Jim Blandy's avatar
Jim Blandy committed
892 893
#endif /* HAVE_X_WINDOWS */

Morten Welinder's avatar
Morten Welinder committed
894 895 896 897
#if defined (MSDOS) && !defined (HAVE_X_WINDOWS)
      syms_of_xfaces ();
#endif

898 899 900 901
#ifdef HAVE_MENUS
      syms_of_xmenu ();
#endif /* HAVE_MENUS */

902 903 904 905 906 907 908 909
#ifdef HAVE_NTGUI
      syms_of_win32term ();
      syms_of_win32fns ();
      syms_of_win32faces ();
      syms_of_win32select ();
      syms_of_win32menu ();
#endif /* HAVE_NTGUI */

Jim Blandy's avatar
Jim Blandy committed
910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925
#ifdef SYMS_SYSTEM
      SYMS_SYSTEM;
#endif

#ifdef SYMS_MACHINE
      SYMS_MACHINE;
#endif

      keys_of_casefiddle ();
      keys_of_cmds ();
      keys_of_buffer ();
      keys_of_keyboard ();
      keys_of_keymap ();
      keys_of_macros ();
      keys_of_minibuf ();
      keys_of_window ();
926
      keys_of_frame ();
Jim Blandy's avatar
Jim Blandy committed
927 928 929 930
    }

  if (!initialized)
    {
Karl Heuer's avatar
Karl Heuer committed
931
      char *file;
Jim Blandy's avatar
Jim Blandy committed
932
      /* Handle -l loadup-and-dump, args passed by Makefile. */
933
      if (argmatch (argv, argc, "-l", "--load", 3, &file, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
934
	Vtop_level = Fcons (intern ("load"),
Karl Heuer's avatar
Karl Heuer committed
935
			    Fcons (build_string (file), Qnil));
Jim Blandy's avatar
Jim Blandy committed
936 937
#ifdef CANNOT_DUMP
      /* Unless next switch is -nl, load "loadup.el" first thing.  */
938
      if (!argmatch (argv, argc, "-nl", "--no-loadup", 6, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
939 940 941 942 943
	Vtop_level = Fcons (intern ("load"),
			    Fcons (build_string ("loadup.el"), Qnil));
#endif /* CANNOT_DUMP */
    }

944 945 946 947 948 949 950 951
  if (initialized)
    {
      /* Erase any pre-dump messages in the message log, to avoid confusion */
      Lisp_Object old_log_max;
      old_log_max = Vmessage_log_max;
      XSETFASTINT (Vmessage_log_max, 0);
      message_dolog ("", 0, 1);
      Vmessage_log_max = old_log_max;
952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968

#ifdef HAVE_TZSET
      {
	/* If the execution TZ happens to be the same as the dump TZ,
	   change it to some other value and then change it back,
	   to force the underlying implementation to reload the TZ info.
	   This is needed on implementations that load TZ info from files,
	   since the TZ file contents may differ between dump and execution.  */
	char *tz = getenv ("TZ");
	if (tz && !strcmp (tz, dump_tz))
	  {
	    ++*tz;
	    tzset ();
	    --*tz;
	  }
      }
#endif
969 970
    }

Jim Blandy's avatar
Jim Blandy committed
971 972
  initialized = 1;

973 974
#ifdef LOCALTIME_CACHE
  /* Some versions of localtime have a bug.  They cache the value of the time
Jim Blandy's avatar
Jim Blandy committed
975 976
     zone rather than looking it up every time.  Since localtime() is
     called to bolt the undumping time into the undumped emacs, this
977 978 979
     results in localtime ignoring the TZ environment variable.
     This flushes the new TZ value into localtime. */
  tzset ();
980
#endif /* defined (LOCALTIME_CACHE) */
Jim Blandy's avatar
Jim Blandy committed
981

Jim Blandy's avatar
Jim Blandy committed
982 983 984 985 986
  /* Enter editor command loop.  This never returns.  */
  Frecursive_edit ();
  /* NOTREACHED */
}

987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001
/* Sort the args so we can find the most important ones
   at the beginning of argv.  */

/* First, here's a table of all the standard options.  */

struct standard_args
{
  char *name;
  char *longname;
  int priority;
  int nargs;
};

struct standard_args standard_args[] =
{
1002 1003
  { "-version", "--version", 110, 0 },
  { "-help", "--help", 110, 0 },
1004
  { "-nl", "--no-shared-memory", 100, 0 },
1005
#ifdef VMS
1006
  { "-map", "--map-data", 100, 0 },
1007
#endif
1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018
  { "-t", "--terminal", 90, 1 },
  { "-d", "--display", 80, 1 },
  { "-display", 0, 80, 1 },
  { "-nw", "--no-windows", 70, 0 },
  { "-batch", "--batch", 60, 0 },
  { "-q", "--no-init-file", 50, 0 },
  { "-no-init-file", 0, 50, 0 },
  { "-no-site-file", "--no-site-file", 40, 0 },
  { "-u", "--user", 30, 1 },
  { "-user", 0, 30, 1 },
  { "-debug-init", "--debug-init", 20, 0 },
1019 1020
  { "-i", "--icon-type", 15, 0 },
  { "-itype", 0, 15, 0 },
1021
  { "-iconic", "--iconic", 15, 0 },
1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037
  { "-bg", "--background-color", 10, 1 },
  { "-background", 0, 10, 1 },
  { "-fg", "--foreground-color", 10, 1 },
  { "-foreground", 0, 10, 1 },
  { "-bd", "--border-color", 10, 1 },
  { "-bw", "--border-width", 10, 1 },
  { "-ib", "--internal-border", 10, 1 },
  { "-ms", "--mouse-color", 10, 1 },
  { "-cr", "--cursor-color", 10, 1 },
  { "-fn", "--font", 10, 1 },
  { "-font", 0, 10, 1 },
  { "-g", "--geometry", 10, 1 },
  { "-geometry", 0, 10, 1 },
  { "-T", "--title", 10, 1 },
  { "-name", "--name", 10, 1 },
  { "-xrm", "--xrm", 10, 1 },
1038 1039 1040 1041 1042 1043
  { "-r", "--reverse-video", 5, 0 },
  { "-rv", 0, 5, 0 },
  { "-reverse", 0, 5, 0 },
  { "-vb", "--vertical-scroll-bars", 5, 0 },
  /* These have the same priority as ordinary file name args,
     so they are not reordered with respect to those.  */
1044 1045
  { "-L", "--directory", 0, 1 },
  { "-directory", 0, 0, 1 },
1046 1047 1048 1049
  { "-l", "--load", 0, 1 },
  { "-load", 0, 0, 1 },
  { "-f", "--funcall", 0, 1 },
  { "-funcall", 0, 0, 1 },
1050
  { "-eval", "--eval", 0, 1 },
1051
  { "-insert", "--insert", 0, 1 },
1052
  /* This should be processed after ordinary file name args and the like.  */
1053
  { "-kill", "--kill", -10, 0 },
1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071
};

/* Reorder the elements of ARGV (assumed to have ARGC elements)
   so that the highest priority ones come first.
   Do not change the order of elements of equal priority.
   If an option takes an argument, keep it and its argument together.  */

static void
sort_args (argc, argv)
     int argc;
     char **argv;
{
  char **new = (char **) xmalloc (sizeof (char *) * argc);
  /* For each element of argv,
     the corresponding element of options is:
     0 for an option that takes no arguments,
     1 for an option that takes one argument, etc.
     -1 for an ordinary non-option argument.  */
1072
  int *options = (int *) xmalloc (sizeof (int) * argc);
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082
  int *priority = (int *) xmalloc (sizeof (int) * argc);
  int to = 1;
  int from;
  int i;

  /* Categorize all the options,
     and figure out which argv elts are option arguments.  */
  for (from = 1; from < argc; from++)
    {
      options[from] = -1;
1083
      priority[from] = 0;
1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094
      if (argv[from][0] == '-')
	{
	  int match, thislen;
	  char *equals;

	  /* Look for a match with a known old-fashioned option.  */
	  for (i = 0; i < sizeof (standard_args) / sizeof (standard_args[0]); i++)
	    if (!strcmp (argv[from], standard_args[i].name))
	      {
		options[from] = standard_args[i].nargs;
		priority[from] = standard_args[i].priority;
1095 1096
		if (from + standard_args[i].nargs >= argc)
		  fatal ("Option `%s' requires an argument\n", argv[from]);
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111
		from += standard_args[i].nargs;
		goto done;
	      }

	  /* Look for a match with a known long option.
	     MATCH is -1 if no match so far, -2 if two or more matches so far,
	     >= 0 (the table index of the match) if just one match so far.  */
	  if (argv[from][1] == '-')
	    {
	      match = -1;
	      thislen = strlen (argv[from]);
	      equals = index (argv[from], '=');
	      if (equals != 0)
		thislen = equals - argv[from];

1112 1113 1114 1115 1116
	      for (i = 0;
		   i < sizeof (standard_args) / sizeof (standard_args[0]); i++)
		if (standard_args[i].longname
		    && !strncmp (argv[from], standard_args[i].longname,
				 thislen))
1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132
		  {
		    if (match == -1)
		      match = i;
		    else
		      match = -2;
		  }

	      /* If we found exactly one match, use that.  */
	      if (match >= 0)
		{
		  options[from] = standard_args[match].nargs;
		  priority[from] = standard_args[match].priority;
		  /* If --OPTION=VALUE syntax is used,
		     this option uses just one argv element.  */
		  if (equals != 0)
		    options[from] = 0;
1133 1134
		  if (from + options[from] >= argc)
		    fatal ("Option `%s' requires an argument\n", argv[from]);
1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
		  from += options[from];
		}
	    }
	done: ;
	}
    }

  /* Copy the arguments, in order of decreasing priority, to NEW.  */
  new[0] = argv[0];
  while (to < argc)
    {
      int best = -1;
1147
      int best_priority = -9999;
1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176

      /* Find the highest priority remaining option.
	 If several have equal priority, take the first of them.  */
      for (from = 1; from < argc; from++)
	{
	  if (argv[from] != 0 && priority[from] > best_priority)
	    {
	      best_priority = priority[from];
	      best = from;
	    }
	  /* Skip option arguments--they are tied to the options.  */
	  if (options[from] > 0)
	    from += options[from];
	}
	    
      if (best < 0)
	abort ();

      /* Copy the highest priority remaining option, with its args, to NEW.  */
      new[to++] = argv[best];
      for (i = 0; i < options[best]; i++)
	new[to++] = argv[best + i + 1];

      /* Clear out this option in ARGV.  */
      argv[best] = 0;
      for (i = 0; i < options[best]; i++)
	argv[best + i + 1] = 0;
    }

1177
  bcopy (new, argv, sizeof (char *) * argc);
1178 1179
}

Jim Blandy's avatar
Jim Blandy committed
1180
DEFUN ("kill-emacs", Fkill_emacs, Skill_emacs, 0, 1, "P",
1181
  "Exit the Emacs job and kill it.\n\
Jim Blandy's avatar
Jim Blandy committed
1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198
If ARG is an integer, return ARG as the exit program code.\n\
If ARG is a  string, stuff it as keyboard input.\n\n\
The value of `kill-emacs-hook', if not void,\n\
is a list of functions (of no args),\n\
all of which are called before Emacs is actually killed.")
  (arg)
     Lisp_Object arg;
{
  Lisp_Object hook, hook1;
  int i;
  struct gcpro gcpro1;

  GCPRO1 (arg);

  if (feof (stdin))
    arg = Qt;

Jim Blandy's avatar
Jim Blandy committed
1199
  if (!NILP (Vrun_hooks) && !noninteractive)
Jim Blandy's avatar
Jim Blandy committed
1200 1201 1202 1203 1204 1205 1206 1207 1208
    call1 (Vrun_hooks, intern ("kill-emacs-hook"));

  UNGCPRO;

/* Is it really necessary to do this deassign
   when we are going to exit anyway?  */
/* #ifdef VMS
  stop_vms_input ();
 #endif  */
1209

1210
  shut_down_emacs (0, 0, STRINGP (arg) ? arg : Qnil);
1211

1212 1213 1214 1215 1216 1217
  /* If we have an auto-save list file,
     kill it because we are exiting Emacs deliberately (not crashing).
     Do it after shut_down_emacs, which does an auto-save.  */
  if (STRINGP (Vauto_save_list_file_name))
    unlink (XSTRING (Vauto_save_list_file_name)->data);

1218
  exit (INTEGERP (arg) ? XINT (arg)
Jim Blandy's avatar
Jim Blandy committed
1219 1220 1221 1222 1223 1224 1225 1226
#ifdef VMS
	: 1
#else
	: 0
#endif
	);
  /* NOTREACHED */
}
1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238


/* Perform an orderly shutdown of Emacs.  Autosave any modified
   buffers, kill any child processes, clean up the terminal modes (if
   we're in the foreground), and other stuff like that.  Don't perform
   any redisplay; this may be called when Emacs is shutting down in
   the background, or after its X connection has died.

   If SIG is a signal number, print a message for it.

   This is called by fatal signal handlers, X protocol error handlers,
   and Fkill_emacs.  */
1239

1240
void
1241
shut_down_emacs (sig, no_x, stuff)
1242
     int sig, no_x;
1243
     Lisp_Object stuff;
1244
{
1245 1246 1247
  /* Prevent running of hooks from now on.  */
  Vrun_hooks = Qnil;

1248 1249 1250
  /* If we are controlling the terminal, reset terminal modes */
#ifdef EMACS_HAVE_TTY_PGRP
  {
1251 1252
    int pgrp = EMACS_GETPGRP (0);

1253 1254
    int tpgrp;
    if (EMACS_GET_TTY_PGRP (0, &tpgrp) != -1
1255
	&& tpgrp == pgrp)
1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267
      {
	fflush (stdout);
	reset_sys_modes ();
	if (sig && sig != SIGTERM)
	  fprintf (stderr, "Fatal error (%d).", sig);
      }
  }
#else
  fflush (stdout);
  reset_sys_modes ();
#endif

1268 1269
  stuff_buffered_input (stuff);

1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280
  kill_buffer_processes (Qnil);
  Fdo_auto_save (Qt, Qnil);

#ifdef CLASH_DETECTION
  unlock_all_files ();
#endif

#ifdef VMS
  kill_vms_processes ();
#endif

1281
#if 0 /* This triggers a bug in XCloseDisplay and is not needed.  */
1282
#ifdef HAVE_X_WINDOWS
1283 1284 1285 1286 1287
  /* It's not safe to call intern here.  Maybe we are crashing.  */
  if (!noninteractive && SYMBOLP (Vwindow_system)
      && XSYMBOL (Vwindow_system)->name->size == 1
      && XSYMBOL (Vwindow_system)->name->data[0] == 'x'
      && ! no_x)
1288 1289
    Fx_close_current_connection ();
#endif /* HAVE_X_WINDOWS */
1290
#endif
1291

1292 1293 1294 1295 1296 1297 1298 1299 1300
#ifdef SIGIO
  /* There is a tendency for a SIGIO signal to arrive within exit,
     and cause a SIGHUP because the input descriptor is already closed.  */
  unrequest_sigio ();
  signal (SIGIO, SIG_IGN);
#endif
}


Jim Blandy's avatar
Jim Blandy committed
1301 1302 1303 1304 1305 1306 1307 1308

#ifndef CANNOT_DUMP

#ifdef HAVE_SHM

DEFUN ("dump-emacs-data", Fdump_emacs_data, Sdump_emacs_data, 1, 1, 0,
  "Dump current state of Emacs into data file FILENAME.\n\
This function exists on systems that use HAVE_SHM.")
1309 1310
  (filename)
     Lisp_Object filename;
Jim Blandy's avatar
Jim Blandy committed
1311
{
1312
  extern char my_edata[];
Jim Blandy's avatar
Jim Blandy committed
1313 1314
  Lisp_Object tem;

1315 1316
  CHECK_STRING (filename, 0);
  filename = Fexpand_file_name (filename, Qnil);
Jim Blandy's avatar
Jim Blandy committed
1317 1318 1319 1320 1321 1322 1323 1324

  tem = Vpurify_flag;
  Vpurify_flag = Qnil;

  fflush (stdout);
  /* Tell malloc where start of impure now is */
  /* Also arrange for warnings when nearly out of space.  */
#ifndef SYSTEM_MALLOC
1325
  memory_warnings (my_edata, malloc_warning);
Jim Blandy's avatar
Jim Blandy committed
1326
#endif
1327
  map_out_data (XSTRING (filename)->data);
Jim Blandy's avatar
Jim Blandy committed
1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343

  Vpurify_flag = tem;

  return Qnil;
}

#else /* not HAVE_SHM */

DEFUN ("dump-emacs", Fdump_emacs, Sdump_emacs, 2, 2, 0,
  "Dump current state of Emacs into executable file FILENAME.\n\
Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\
This is used in the file `loadup.el' when building Emacs.\n\
\n\
Bind `command-line-processed' to nil before dumping,\n\
if you want the dumped Emacs to process its command line\n\
and announce itself normally when it is run.")
1344 1345
  (filename, symfile)
     Lisp_Object filename, symfile;
Jim Blandy's avatar
Jim Blandy committed
1346
{
1347
  extern char my_edata[];
Jim Blandy's avatar
Jim Blandy committed
1348 1349
  Lisp_Object tem;

1350 1351 1352
  CHECK_STRING (filename, 0);
  filename = Fexpand_file_name (filename, Qnil);
  if (!NILP (symfile))
Jim Blandy's avatar
Jim Blandy committed
1353
    {
1354 1355 1356
      CHECK_STRING (symfile, 0);
      if (XSTRING (symfile)->size)
	symfile = Fexpand_file_name (symfile, Qnil);
Jim Blandy's avatar
Jim Blandy committed
1357 1358 1359 1360 1361
    }

  tem = Vpurify_flag;
  Vpurify_flag = Qnil;

1362 1363 1364 1365 1366 1367 1368 1369
#ifdef HAVE_TZSET
  set_time_zone_rule (dump_tz);
#ifndef LOCALTIME_CACHE
  /* Force a tz reload, since set_time_zone_rule doesn't.  */
  tzset ();
#endif
#endif

Jim Blandy's avatar
Jim Blandy committed
1370 1371
  fflush (stdout);
#ifdef VMS
1372
  mapout_data (XSTRING (filename)->data);
Jim Blandy's avatar
Jim Blandy committed
1373 1374 1375 1376
#else
  /* Tell malloc where start of impure now is */
  /* Also arrange for warnings when nearly out of space.  */
#ifndef SYSTEM_MALLOC
1377 1378 1379
#ifndef WINDOWSNT
  /* On Windows, this was done before dumping, and that once suffices.
     Meanwhile, my_edata is not valid on Windows.  */
1380
  memory_warnings (my_edata, malloc_warning);
1381
#endif /* not WINDOWSNT */
Jim Blandy's avatar
Jim Blandy committed
1382
#endif
1383 1384
  unexec (XSTRING (filename)->data,
	  !NILP (symfile) ? XSTRING (symfile)->data : 0, my_edata, 0, 0);
Jim Blandy's avatar
Jim Blandy committed
1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395
#endif /* not VMS */

  Vpurify_flag = tem;

  return Qnil;
}

#endif /* not HAVE_SHM */

#endif /* not CANNOT_DUMP */

1396
#ifndef SEPCHAR
Jim Blandy's avatar
Jim Blandy committed
1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407
#define SEPCHAR ':'
#endif

Lisp_Object
decode_env_path (evarname, defalt)
     char *evarname, *defalt;
{
  register char *path, *p;

  Lisp_Object lpath;

Jim Blandy's avatar
Jim Blandy committed
1408 1409 1410
  /* It's okay to use getenv here, because this function is only used
     to initialize variables when Emacs starts up, and isn't called
     after that.  */
Jim Blandy's avatar
Jim Blandy committed
1411 1412 1413 1414
  if (evarname != 0)
    path = (char *) getenv (evarname);
  else
    path = 0;
Jim Blandy's avatar
Jim Blandy committed
1415 1416 1417 1418 1419 1420 1421
  if (!path)
    path = defalt;
  lpath = Qnil;
  while (1)
    {
      p = index (path, SEPCHAR);
      if (!p) p = path + strlen (path);
1422 1423
      lpath = Fcons (p - path ? make_string (path, p - path)
		     : build_string ("."),
Jim Blandy's avatar
Jim Blandy committed
1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434
		     lpath);
      if (*p)
	path = p + 1;
      else
	break;
    }
  return Fnreverse (lpath);
}

syms_of_emacs ()
{
1435
#ifndef CANNOT_DUMP
Jim Blandy's avatar
Jim Blandy committed
1436 1437 1438 1439
#ifdef HAVE_SHM
  defsubr (&Sdump_emacs_data);
#else
  defsubr (&Sdump_emacs);
1440
#endif
Jim Blandy's avatar
Jim Blandy committed
1441 1442 1443 1444
#endif

  defsubr (&Skill_emacs);

1445
  defsubr (&Sinvocation_name);
1446
  defsubr (&Sinvocation_directory);
1447

Jim Blandy's avatar
Jim Blandy committed
1448 1449 1450 1451 1452 1453 1454
  DEFVAR_LISP ("command-line-args", &Vcommand_line_args,
    "Args passed by shell to Emacs, as a list of strings.");

  DEFVAR_LISP ("system-type", &Vsystem_type,
    "Value is symbol indicating type of operating system you are using.");
  Vsystem_type = intern (SYSTEM_TYPE);

1455 1456
  DEFVAR_LISP ("system-configuration", &Vsystem_configuration,
    "Value is string indicating configuration Emacs was built for.");
1457
  Vsystem_configuration = build_string (EMACS_CONFIGURATION);
1458

1459 1460 1461 1462
  DEFVAR_LISP ("system-configuration-options", &Vsystem_configuration_options,
    "String containing the configuration options Emacs was built with.");
  Vsystem_configuration_options = build_string (EMACS_CONFIG_OPTIONS);

Jim Blandy's avatar
Jim Blandy committed
1463 1464
  DEFVAR_BOOL ("noninteractive", &noninteractive1,
    "Non-nil means Emacs is running without interactive terminal.");
Jim Blandy's avatar
Jim Blandy committed
1465 1466

  DEFVAR_LISP ("kill-emacs-hook", &Vkill_emacs_hook,
1467 1468 1469
    "Hook to be run whenever kill-emacs is called.\n\
Since kill-emacs may be invoked when the terminal is disconnected (or\n\
in other similar situations), functions placed on this hook should not\n\
1470 1471
expect to be able to interact with the user.  To ask for confirmation,\n\
see `kill-emacs-query-functions' instead.");
1472
  Vkill_emacs_hook = Qnil;
1473 1474 1475 1476 1477

  DEFVAR_INT ("emacs-priority", &emacs_priority,
    "Priority for Emacs to run at.\n\
This value is effective only if set before Emacs is dumped,\n\
and only if the Emacs executable is installed with setuid to permit\n\
1478
it to change priority.  (Emacs sets its uid back to the real uid.)\n\
1479
Currently, you need to define SET_EMACS_PRIORITY in `config.h'\n\
1480
before you compile Emacs, to enable the code for this feature.");
1481
  emacs_priority = 0;
1482

1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495
  DEFVAR_LISP ("invocation-name", &Vinvocation_name,
    "The program name that was used to run Emacs.\n\
Any directory names are omitted.");

  DEFVAR_LISP ("invocation-directory", &Vinvocation_directory,
    "The directory in which the Emacs executable was found, to run it.\n\
The value is nil if that directory's name is not known.");

  DEFVAR_LISP ("installation-directory", &Vinstallation_directory,
    "A directory within which to look for the `lib-src' and `etc' directories.\n\
This is non-nil when we can't find those directories in their standard\n\
installed locations, but we can find them\n\
near where the Emacs executable was found.");
1496
  Vinstallation_directory = Qnil;
Jim Blandy's avatar
Jim Blandy committed
1497
}