emacs.c 42.8 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
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
Richard M. Stallman's avatar
Richard M. Stallman committed
18 19
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */
Jim Blandy's avatar
Jim Blandy committed
20 21 22 23 24


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

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

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

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

35
#ifdef BSD_SYSTEM
Jim Blandy's avatar
Jim Blandy committed
36 37 38 39 40
#include <sys/ioctl.h>
#endif

#include "lisp.h"
#include "commands.h"
Joseph Arceneaux's avatar
Joseph Arceneaux committed
41
#include "intervals.h"
Jim Blandy's avatar
Jim Blandy committed
42

43
#include "systty.h"
Richard M. Stallman's avatar
Richard M. Stallman committed
44
#include "blockinput.h"
45
#include "syssignal.h"
Richard M. Stallman's avatar
Richard M. Stallman committed
46
#include "process.h"
Jim Blandy's avatar
Jim Blandy committed
47

48 49 50 51 52
#ifdef HAVE_SETRLIMIT
#include <sys/time.h>
#include <sys/resource.h>
#endif

Jim Blandy's avatar
Jim Blandy committed
53 54 55 56
#ifndef O_RDWR
#define O_RDWR 2
#endif

57
extern void malloc_warning ();
58
extern void set_time_zone_rule ();
59 60 61
extern char *index ();
extern char *strerror ();

Jim Blandy's avatar
Jim Blandy committed
62 63 64
/* Command line args from shell, as list of strings */
Lisp_Object Vcommand_line_args;

65 66 67 68
/* The name under which Emacs was invoked, with any leading directory
   names discarded.  */
Lisp_Object Vinvocation_name;

69 70 71
/* The directory name from which Emacs was invoked.  */
Lisp_Object Vinvocation_directory;

72 73 74 75
/* 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
76 77 78
/* Hook run by `kill-emacs' before it does really anything.  */
Lisp_Object Vkill_emacs_hook;

Jim Blandy's avatar
Jim Blandy committed
79 80 81 82 83
/* Set nonzero after Emacs has started up the first time.
  Prevents reinitialization of the Lisp world and keymaps
  on subsequent starts.  */
int initialized;

84
/* Variable whose value is symbol giving operating system type.  */
Jim Blandy's avatar
Jim Blandy committed
85
Lisp_Object Vsystem_type;
86 87 88

/* Variable whose value is string giving configuration built for.  */
Lisp_Object Vsystem_configuration;
89 90 91 92 93

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

94 95
Lisp_Object Qfile_name_handler_alist;

Jim Blandy's avatar
Jim Blandy committed
96 97 98 99
/* 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;

100 101 102
/* 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.  */
103 104
int emacs_priority;

105 106 107 108
/* 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;

109
#ifdef BSD_PGRPS
110 111 112 113
/* See sysdep.c.  */
extern int inherited_pgroup;
#endif

Jim Blandy's avatar
Jim Blandy committed
114 115 116 117 118 119 120 121 122
#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;

123
#ifdef HAVE_WINDOW_SYSTEM
Jim Blandy's avatar
Jim Blandy committed
124
extern Lisp_Object Vwindow_system;
125
#endif /* HAVE_WINDOW_SYSTEM */
Jim Blandy's avatar
Jim Blandy committed
126

127 128
extern Lisp_Object Vauto_save_list_file_name;

Jim Blandy's avatar
Jim Blandy committed
129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144
#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;
145 146 147 148

/* Save argv and argc.  */
char **initial_argv;
int initial_argc;
149 150

static void sort_args ();
Jim Blandy's avatar
Jim Blandy committed
151 152 153 154 155 156 157 158

/* 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
159
SIGTYPE
Jim Blandy's avatar
Jim Blandy committed
160 161 162 163 164 165
fatal_error_signal (sig)
     int sig;
{
  fatal_error_code = sig;
  signal (sig, SIG_DFL);

166 167
  TOTALLY_UNBLOCK_INPUT;

Jim Blandy's avatar
Jim Blandy committed
168
  /* If fatal error occurs in code below, avoid infinite recursion.  */
169 170 171
  if (! fatal_error_in_progress)
    {
      fatal_error_in_progress = 1;
Jim Blandy's avatar
Jim Blandy committed
172

173
      shut_down_emacs (sig, 0, Qnil);
174
    }
Jim Blandy's avatar
Jim Blandy committed
175 176 177 178

#ifdef VMS
  LIB$STOP (SS$_ABORT);
#else
179 180 181 182
  /* 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.  */
183
#ifndef MSDOS
184
  sigunblock (sigmask (fatal_error_code));
185
#endif
Jim Blandy's avatar
Jim Blandy committed
186 187 188
  kill (getpid (), fatal_error_code);
#endif /* not VMS */
}
189 190 191

#ifdef SIGDANGER

Richard M. Stallman's avatar
Richard M. Stallman committed
192
/* Handler for SIGDANGER.  */
193 194 195 196 197 198 199
SIGTYPE
memory_warning_signal (sig)
     int sig;
{
  signal (sig, memory_warning_signal);

  malloc_warning ("Operating system warns that virtual memory is running low.\n");
200 201 202

  /* It might be unsafe to call do_auto_save now.  */
  force_auto_save_soon ();
203 204
}
#endif
Jim Blandy's avatar
Jim Blandy committed
205 206 207 208 209 210 211 212 213 214

/* 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;
215 216 217
  Lisp_Object name, dir, tem;
  int count = specpdl_ptr - specpdl;
  Lisp_Object raw_name;
Jim Blandy's avatar
Jim Blandy committed
218

219 220 221
  initial_argv = argv;
  initial_argc = argc;

222 223 224 225 226 227 228 229 230 231 232
  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);

233 234 235 236 237 238
  /* 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
239
		       EXEC_SUFFIXES, &found, 1);
240
      if (yes == 1)
241 242 243 244 245 246 247 248
	{
	  /* 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);
	}
249
    }
250

251 252
  if (!NILP (Vinvocation_directory)
      && NILP (Ffile_name_absolute_p (Vinvocation_directory)))
253 254
    /* Emacs was started with relative path, like ./emacs.
       Make it absolute.  */
255 256
    Vinvocation_directory = Fexpand_file_name (Vinvocation_directory, Qnil);

257 258 259 260 261 262 263 264
  Vinstallation_directory = Qnil;

  if (!NILP (Vinvocation_directory))
    {
      dir = Vinvocation_directory;
      name = Fexpand_file_name (Vinvocation_name, dir);
      while (1)
	{
265
	  Lisp_Object tem, lib_src_exists;
266 267
	  Lisp_Object etc_exists, info_exists;

268 269 270 271 272
	  /* 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);
273 274 275 276 277 278 279 280

	  /* 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);

	  if (!NILP (lib_src_exists) || !NILP (info_exists))
281
	    {
282 283 284
	      tem = Fexpand_file_name (build_string ("etc"), dir);
	      etc_exists = Ffile_exists_p (tem);
	      if (!NILP (etc_exists))
285
		{
286 287 288
		  Vinstallation_directory
		    = Ffile_name_as_directory (dir);
		  break;
289 290 291 292
		}
	    }

	  /* See if dir's parent contains those subdirs.  */
293 294
	  tem = Fexpand_file_name (build_string ("../lib-src"), dir);
	  lib_src_exists = Ffile_exists_p (tem);
295 296 297 298 299

	  tem = Fexpand_file_name (build_string ("../info"), dir);
	  info_exists = Ffile_exists_p (tem);

	  if (!NILP (lib_src_exists) || !NILP (info_exists))
300
	    {
301 302 303
	      tem = Fexpand_file_name (build_string ("../etc"), dir);
	      etc_exists = Ffile_exists_p (tem);
	      if (!NILP (etc_exists))
304
		{
305 306 307 308
		  tem = Fexpand_file_name (build_string (".."), dir);
		  Vinstallation_directory
		    = Ffile_name_as_directory (tem);
		  break;
309 310 311 312 313 314 315 316
		}
	    }

	  /* 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))
	    {
317
	      name = Fexpand_file_name (tem, dir);
318 319 320 321 322 323 324
	      dir = Ffile_name_directory (name);
	    }
	  else
	    break;
	}
    }

Jim Blandy's avatar
Jim Blandy committed
325 326 327 328 329 330 331 332
  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);
    }
333 334

  unbind_to (count, Qnil);
Jim Blandy's avatar
Jim Blandy committed
335
}
336 337 338 339 340 341 342 343 344

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);
}

345 346 347 348 349 350 351 352
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
353 354 355

#ifdef VMS
#ifdef LINK_CRTL_SHARE
356
#ifdef SHARABLE_LIB_BUG
Jim Blandy's avatar
Jim Blandy committed
357
extern noshare char **environ;
358
#endif /* SHARABLE_LIB_BUG */
Jim Blandy's avatar
Jim Blandy committed
359 360 361
#endif /* LINK_CRTL_SHARE */
#endif /* VMS */

362 363 364 365 366 367
#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

368
#ifndef ORDINARY_LINK
369 370 371 372 373
/* 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__
374
#ifndef GCC_CTORS_IN_LIBC
375
__do_global_ctors ()
376
{}
377 378
__do_global_ctors_aux ()
{}
379 380
__do_global_dtors ()
{}
381 382
/* Linux has a bug in its library; avoid an error.  */
#ifndef LINUX
383
char * __CTOR_LIST__[2] = { (char *) (-1), 0 };
384
#endif
385
char * __DTOR_LIST__[2] = { (char *) (-1), 0 };
386
#endif /* GCC_CTORS_IN_LIBC */
387
__main ()
388 389
{}
#endif /* __GNUC__ */
390
#endif /* ORDINARY_LINK */
391

Karl Heuer's avatar
Karl Heuer committed
392 393 394 395 396 397 398 399 400
/* 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.  */
401

Karl Heuer's avatar
Karl Heuer committed
402
static int
403
argmatch (argv, argc, sstr, lstr, minlen, valptr, skipptr)
Karl Heuer's avatar
Karl Heuer committed
404
     char **argv;
405
     int argc;
Karl Heuer's avatar
Karl Heuer committed
406 407 408 409 410 411 412 413
     char *sstr;
     char *lstr;
     int minlen;
     char **valptr;
     int *skipptr;
{
  char *p;
  int arglen;
414 415 416 417 418 419 420
  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
421 422 423 424 425 426 427 428 429 430 431 432 433 434 435
  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));
436
  if (lstr == 0 || arglen < minlen || strncmp (arg, lstr, arglen) != 0)
Karl Heuer's avatar
Karl Heuer committed
437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460
    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
461 462 463 464 465 466 467 468 469 470
/* 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;
471 472 473
#ifdef HAVE_SETRLIMIT
  struct rlimit rlim;
#endif
Jim Blandy's avatar
Jim Blandy committed
474

475 476 477 478
#ifdef LINUX_SBRK_BUG
  __sbrk (1);
#endif

479 480
  sort_args (argc, argv);

481 482 483 484 485 486 487 488 489 490 491
  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
	{
492
	  printf ("GNU Emacs %s\n", XSTRING (tem)->data);
493 494 495 496 497 498
	  printf ("Copyright (C) 1996 Free Software Foundation, Inc.\n");
	  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, ");
	  printf ("see the files named COPYING.\n");
499 500 501 502
	  exit (0);
	}
    }

Jim Blandy's avatar
Jim Blandy committed
503 504
/* Map in shared memory, if we are using that.  */
#ifdef HAVE_SHM
505
  if (argmatch (argv, argc, "-nl", "--no-shared-memory", 6, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
506 507 508 509 510 511 512 513 514 515 516 517 518
    {
      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

519
#ifdef NeXT
520 521 522 523 524 525 526
  {
    extern int malloc_cookie;
    /* This helps out unexnext.c.  */
    if (initialized)
      if (malloc_jumpstart (malloc_cookie) != 0)
	printf ("malloc jumpstart failed!\n");
  }
527 528
#endif /* NeXT */

Jim Blandy's avatar
Jim Blandy committed
529 530
#ifdef VMS
  /* If -map specified, map the data file in */
Karl Heuer's avatar
Karl Heuer committed
531 532
  {
    char *file;
533
    if (argmatch (argv, argc, "-map", "--map-data", 3, &mapin_file, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
534 535
      mapin_data (file);
  }
Jim Blandy's avatar
Jim Blandy committed
536 537

#ifdef LINK_CRTL_SHARE
538
#ifdef SHARABLE_LIB_BUG
Jim Blandy's avatar
Jim Blandy committed
539 540 541 542 543 544 545 546 547
  /* 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;
548
#endif /* SHARABLE_LIB_BUG */
Jim Blandy's avatar
Jim Blandy committed
549 550 551
#endif /* LINK_CRTL_SHARE */
#endif /* VMS */

552 553 554 555
#ifdef HAVE_SETRLIMIT
  /* Extend the stack space available.  */
  if (!getrlimit (RLIMIT_STACK, &rlim))
    {
556 557 558 559 560 561 562 563
      long newlim;
      /* Approximate the amount regex.c needs, plus some more.  */
      newlim = 800000 * sizeof (char *);
      if (newlim > rlim.rlim_max)
	newlim = rlim.rlim_max;
      if (rlim.rlim_cur < newlim)
	rlim.rlim_cur = newlim;

564 565 566 567
      setrlimit (RLIMIT_STACK, &rlim);
    }
#endif

Jim Blandy's avatar
Jim Blandy committed
568 569 570 571 572 573 574 575 576 577
  /* 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)
578
    brk ((void *)bss_end);
Jim Blandy's avatar
Jim Blandy committed
579 580 581
#endif

  clearerr (stdin);
582

Jim Blandy's avatar
Jim Blandy committed
583 584
#ifndef SYSTEM_MALLOC
  if (! initialized)
585 586 587 588 589 590 591 592
    {
      /* 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
593 594
#endif	/* not SYSTEM_MALLOC */

595 596 597 598
#ifdef MSDOS
  /* We do all file input/output as binary files.  When we need to translate
     newlines, we do that manually.  */
  _fmode = O_BINARY;
599 600 601 602 603 604 605 606 607 608

#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 */
609 610 611
  (stdin)->_flag &= ~_IOTEXT;
  (stdout)->_flag &= ~_IOTEXT;
  (stderr)->_flag &= ~_IOTEXT;
612
#endif /* not __DJGPP__ >= 2 */
613 614
#endif /* MSDOS */

615
#ifdef SET_EMACS_PRIORITY
616
  if (emacs_priority)
617
    nice (emacs_priority);
Jim Blandy's avatar
Jim Blandy committed
618
  setuid (getuid ());
619
#endif /* SET_EMACS_PRIORITY */
Jim Blandy's avatar
Jim Blandy committed
620

621
#ifdef EXTRA_INITIALIZE
622
  EXTRA_INITIALIZE;
623 624
#endif

Jim Blandy's avatar
Jim Blandy committed
625 626
  inhibit_window_system = 0;

Jim Blandy's avatar
Jim Blandy committed
627
  /* Handle the -t switch, which specifies filename to use as terminal */
Karl Heuer's avatar
Karl Heuer committed
628 629
  {
    char *term;
630
    if (argmatch (argv, argc, "-t", "--terminal", 4, &term, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648
      {
	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);
649
#ifdef HAVE_WINDOW_SYSTEM
Karl Heuer's avatar
Karl Heuer committed
650
	inhibit_window_system = 1; /* -t => -nw */
Jim Blandy's avatar
Jim Blandy committed
651
#endif
Karl Heuer's avatar
Karl Heuer committed
652 653
      }
  }
654
  if (argmatch (argv, argc, "-nw", "--no-windows", 6, NULL, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
655
    inhibit_window_system = 1;
Jim Blandy's avatar
Jim Blandy committed
656

Karl Heuer's avatar
Karl Heuer committed
657
  /* Handle the -batch switch, which means don't do interactive display.  */
Jim Blandy's avatar
Jim Blandy committed
658
  noninteractive = 0;
659
  if (argmatch (argv, argc, "-batch", "--batch", 5, NULL, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
660 661 662
    noninteractive = 1;

  /* Handle the --help option, which gives a usage message..  */
663
  if (argmatch (argv, argc, "-help", "--help", 3, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
664
    {
Karl Heuer's avatar
Karl Heuer committed
665 666 667
      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
668
      [--version] [--no-site-file]\n\
Karl Heuer's avatar
Karl Heuer committed
669
      [-f func] [--funcall func]  [-l file] [--load file]  [--insert file]\n\
670 671 672
      [+linenum] file-to-visit  [--kill]\n\
Report bugs to bug-gnu-emacs@prep.ai.mit.edu.  First, please see\n\
the Bugs section of the Emacs manual or the file BUGS.", argv[0]);
Karl Heuer's avatar
Karl Heuer committed
673
      exit (0);
Jim Blandy's avatar
Jim Blandy committed
674 675
    }

676 677 678 679 680 681
#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.  */
  {
682
    char *displayname = 0;
683 684 685
    int i;
    int count_before = skip_args;

686
    if (argmatch (argv, argc, "-d", "--display", 3, &displayname, &skip_args))
687
      display_arg = 1;
688
    else if (argmatch (argv, argc, "-display", 0, 3, &displayname, &skip_args))
689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707
      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++;
      }
708 709 710
    /* Change --display to -d, when its arg is separate.  */
    else if (displayname != 0 && skip_args > count_before
	     && argv[count_before + 1][1] == '-')
711
      argv[count_before + 1] = "-d";
712 713 714 715 716 717

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

718 719 720 721 722 723 724 725 726 727 728 729 730 731 732
  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
733 734 735 736
#ifdef POSIX_SIGNALS
  init_signals ();
#endif

737 738 739 740 741 742 743
  /* Don't catch SIGHUP if dumping.  */
  if (1
#ifndef CANNOT_DUMP
      && initialized
#endif
      )
    {
744
      sigblock (sigmask (SIGHUP));
745 746 747 748 749
      /* 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);
750
      sigunblock (sigmask (SIGHUP));
751 752
    }

Jim Blandy's avatar
Jim Blandy committed
753 754 755 756 757 758 759 760
  if (
#ifndef CANNOT_DUMP
      ! noninteractive || initialized
#else
      1
#endif
      )
    {
761
      /* Don't catch these signals in batch mode if dumping.
Jim Blandy's avatar
Jim Blandy committed
762 763 764 765 766
	 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);
767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787
#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
788 789
#ifdef SIGIOT
      /* This is missing on some systems - OS/2, for example.  */
Jim Blandy's avatar
Jim Blandy committed
790
      signal (SIGIOT, fatal_error_signal);
791
#endif
Jim Blandy's avatar
Jim Blandy committed
792 793 794 795
#ifdef SIGEMT
      signal (SIGEMT, fatal_error_signal);
#endif
      signal (SIGFPE, fatal_error_signal);
796
#ifdef SIGBUS
Jim Blandy's avatar
Jim Blandy committed
797
      signal (SIGBUS, fatal_error_signal);
798
#endif
Jim Blandy's avatar
Jim Blandy committed
799
      signal (SIGSEGV, fatal_error_signal);
800
#ifdef SIGSYS
Jim Blandy's avatar
Jim Blandy committed
801
      signal (SIGSYS, fatal_error_signal);
802
#endif
Jim Blandy's avatar
Jim Blandy committed
803 804 805 806 807 808 809 810
      signal (SIGTERM, fatal_error_signal);
#ifdef SIGXCPU
      signal (SIGXCPU, fatal_error_signal);
#endif
#ifdef SIGXFSZ
      signal (SIGXFSZ, fatal_error_signal);
#endif /* SIGXFSZ */

811 812 813 814 815
#ifdef SIGDANGER
      /* This just means available memory is getting low.  */
      signal (SIGDANGER, memory_warning_signal);
#endif

Jim Blandy's avatar
Jim Blandy committed
816
#ifdef AIX
817 818
/* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU.  */
      signal (SIGXCPU, fatal_error_signal);
819
#ifndef _I386
Jim Blandy's avatar
Jim Blandy committed
820
      signal (SIGIOINT, fatal_error_signal);
821
#endif
Jim Blandy's avatar
Jim Blandy committed
822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837
      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 ();
838 839
      init_charset_once ();
      init_coding_once ();
Jim Blandy's avatar
Jim Blandy committed
840
      init_syntax_once ();	/* Create standard syntax table.  */
841
      init_category_once ();	/* Create standard category table.  */
Jim Blandy's avatar
Jim Blandy committed
842 843 844 845 846 847 848 849 850 851 852
		      /* 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 ();
853
  running_asynch_code = 0;
854

855 856 857 858
#ifdef MSDOS
  /* Call early 'cause init_environment needs it.  */
  init_dosfns ();
  /* Set defaults for several environment variables.  */
859 860 861
  if (initialized)
    init_environment (argc, argv, skip_args);
  else
862
    tzset ();
863
#endif /* MSDOS */
864

865 866 867
#ifdef WINDOWSNT
  /* Initialize environment from registry settings.  */
  init_environment ();
868
  init_ntproc ();	/* must precede init_editfns */
869 870
#endif

871 872 873 874
  /* 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 ();
875 876 877 878 879 880
  /* 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
881

882 883
  init_buffer ();	/* Init default directory of main buffer */

884
  init_callproc_1 ();	/* Must precede init_cmdargs and init_sys_modes.  */
885
  init_cmdargs (argc, argv, skip_args);	/* Must precede init_lread.  */
886 887 888 889 890 891 892 893 894 895 896

  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;
    }

897
  init_callproc ();	/* Must follow init_cmdargs but not init_sys_modes.  */
Jim Blandy's avatar
Jim Blandy committed
898
  init_lread ();
Jim Blandy's avatar
Jim Blandy committed
899 900 901 902

  if (!noninteractive)
    {
#ifdef VMS
Jim Blandy's avatar
Jim Blandy committed
903
      init_vms_input ();/* init_display calls get_frame_size, that needs this */
Jim Blandy's avatar
Jim Blandy committed
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921
#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
922 923 924
#ifdef CLASH_DETECTION
  init_filelock ();
#endif /* CLASH_DETECTION */
Jim Blandy's avatar
Jim Blandy committed
925 926 927 928 929 930 931 932 933 934

/* 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
935
      syms_of_lread ();
Jim Blandy's avatar
Jim Blandy committed
936 937 938 939 940 941 942 943 944 945 946 947
      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 ();
948 949 950
      syms_of_category ();
      syms_of_ccl ();
      syms_of_charset ();
Jim Blandy's avatar
Jim Blandy committed
951 952 953 954 955 956 957 958 959
      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 ();
960
      syms_of_coding ();	/* This should be after syms_of_fileio.  */
Jim Blandy's avatar
Jim Blandy committed
961 962 963 964
#ifdef CLASH_DETECTION
      syms_of_filelock ();
#endif /* CLASH_DETECTION */
      syms_of_indent ();
965
      syms_of_insdel ();
Jim Blandy's avatar
Jim Blandy committed
966 967 968 969 970 971 972 973
      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
974
      syms_of_frame ();
Jim Blandy's avatar
Jim Blandy committed
975
      syms_of_syntax ();
Karl Heuer's avatar
Karl Heuer committed
976
      syms_of_term ();
Jim Blandy's avatar
Jim Blandy committed
977
      syms_of_undo ();
Joseph Arceneaux's avatar
Joseph Arceneaux committed
978 979 980

      /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
      syms_of_textprop ();
Jim Blandy's avatar
Jim Blandy committed
981 982 983
#ifdef VMS
      syms_of_vmsproc ();
#endif /* VMS */
984 985 986
#ifdef WINDOWSNT
      syms_of_ntproc ();
#endif /* WINDOWSNT */
Jim Blandy's avatar
Jim Blandy committed
987 988 989
      syms_of_window ();
      syms_of_xdisp ();
#ifdef HAVE_X_WINDOWS
Jim Blandy's avatar
Jim Blandy committed
990
      syms_of_xterm ();
Jim Blandy's avatar
Jim Blandy committed
991
      syms_of_xfns ();
992
      syms_of_xfaces ();
993
      syms_of_fontset ();
Jim Blandy's avatar
Jim Blandy committed
994 995 996
#ifdef HAVE_X11
      syms_of_xselect ();
#endif
Jim Blandy's avatar
Jim Blandy committed
997 998
#endif /* HAVE_X_WINDOWS */

Morten Welinder's avatar
Morten Welinder committed
999 1000 1001 1002
#if defined (MSDOS) && !defined (HAVE_X_WINDOWS)
      syms_of_xfaces ();
#endif

1003
#ifndef HAVE_NTGUI
1004
      syms_of_xmenu ();
1005
#endif
1006

1007
#ifdef HAVE_NTGUI
1008 1009 1010 1011 1012
      syms_of_w32term ();
      syms_of_w32fns ();
      syms_of_w32faces ();
      syms_of_w32select ();
      syms_of_w32menu ();
1013 1014
#endif /* HAVE_NTGUI */

Jim Blandy's avatar
Jim Blandy committed
1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030
#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 ();
1031
      keys_of_frame ();
Jim Blandy's avatar
Jim Blandy committed
1032 1033 1034 1035
    }

  if (!initialized)
    {
Karl Heuer's avatar
Karl Heuer committed
1036
      char *file;
Jim Blandy's avatar
Jim Blandy committed
1037
      /* Handle -l loadup-and-dump, args passed by Makefile. */
1038
      if (argmatch (argv, argc, "-l", "--load", 3, &file, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
1039
	Vtop_level = Fcons (intern ("load"),
Karl Heuer's avatar
Karl Heuer committed
1040
			    Fcons (build_string (file), Qnil));
Jim Blandy's avatar
Jim Blandy committed
1041 1042
#ifdef CANNOT_DUMP
      /* Unless next switch is -nl, load "loadup.el" first thing.  */
1043
      if (!argmatch (argv, argc, "-nl", "--no-loadup", 6, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
1044 1045 1046 1047 1048
	Vtop_level = Fcons (intern ("load"),
			    Fcons (build_string ("loadup.el"), Qnil));
#endif /* CANNOT_DUMP */
    }

1049 1050
  if (initialized)
    {
1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066
#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
1067 1068
    }

Jim Blandy's avatar
Jim Blandy committed
1069 1070
  initialized = 1;

1071 1072
#ifdef LOCALTIME_CACHE
  /* Some versions of localtime have a bug.  They cache the value of the time
Jim Blandy's avatar
Jim Blandy committed
1073 1074
     zone rather than looking it up every time.  Since localtime() is
     called to bolt the undumping time into the undumped emacs, this
1075 1076 1077
     results in localtime ignoring the TZ environment variable.
     This flushes the new TZ value into localtime. */
  tzset ();
1078
#endif /* defined (LOCALTIME_CACHE) */
Jim Blandy's avatar
Jim Blandy committed
1079

Jim Blandy's avatar
Jim Blandy committed
1080 1081 1082 1083 1084
  /* Enter editor command loop.  This never returns.  */
  Frecursive_edit ();
  /* NOTREACHED */
}

1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099
/* 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[] =
{
1100 1101
  { "-version", "--version", 110, 0 },
  { "-help", "--help", 110, 0 },
1102
  { "-nl", "--no-shared-memory", 100, 0 },
1103
#ifdef VMS
1104
  { "-map", "--map-data", 100, 0 },
1105
#endif
1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116
  { "-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 },
1117 1118
  { "-i", "--icon-type", 15, 0 },
  { "-itype", 0, 15, 0 },
1119
  { "-iconic", "--iconic", 15, 0 },
1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133
  { "-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 },
1134
  { "-title", 0, 10, 1 },
1135 1136
  { "-name", "--name", 10, 1 },
  { "-xrm", "--xrm", 10, 1 },
1137 1138 1139
  { "-r", "--reverse-video", 5, 0 },
  { "-rv", 0, 5, 0 },
  { "-reverse", 0, 5, 0 },
1140
  { "-hb", "--horizontal-scroll-bars", 5, 0 },
1141 1142 1143
  { "-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.  */
1144 1145
  { "-L", "--directory", 0, 1 },
  { "-directory", 0, 0, 1 },
1146 1147 1148 1149
  { "-l", "--load", 0, 1 },
  { "-load", 0, 0, 1 },
  { "-f", "--funcall", 0, 1 },
  { "-funcall", 0, 0, 1 },
1150
  { "-eval", "--eval", 0, 1 },
1151 1152
  { "-find-file", "--find-file", 0, 1 },
  { "-visit", "--visit", 0, 1 },
1153
  { "-insert", "--insert", 0, 1 },
1154
  /* This should be processed after ordinary file name args and the like.  */
1155
  { "-kill", "--kill", -10, 0 },
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173
};

/* 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.  */
1174
  int *options = (int *) xmalloc (sizeof (int) * argc);
1175 1176 1177 1178
  int *priority = (int *) xmalloc (sizeof (int) * argc);
  int to = 1;
  int from;
  int i;
1179
  int end_of_options = argc;
1180 1181 1182 1183 1184 1185

  /* Categorize all the options,
     and figure out which argv elts are option arguments.  */
  for (from = 1; from < argc; from++)
    {
      options[from] = -1;
1186
      priority[from] = 0;
1187 1188 1189 1190 1191
      if (argv[from][0] == '-')
	{
	  int match, thislen;
	  char *equals;

1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204
	  /* If we have found "--", don't consider
	     any more arguments as options.  */
	  if (argv[from][1] == '-')
	    {
	      /* Leave the "--", and everything following it, at the end.  */
	      for (; from < argc; from++)
		{
		  priority[from] = -100;
		  options[from] = -1;
		}
	      break;
	    }

1205 1206 1207 1208 1209 1210
	  /* 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;
1211 1212
		if (from + standard_args[i].nargs >= argc)
		  fatal ("Option `%s' requires an argument\n", argv[from]);
1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227
		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];

1228 1229 1230 1231 1232
	      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))
1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248
		  {
		    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;
1249 1250
		  if (from + options[from] >= argc)
		    fatal ("Option `%s' requires an argument\n", argv[from]);
1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262
		  from += options[from];
		}
	    }
	done: ;
	}
    }

  /* Copy the arguments, in order of decreasing priority, to NEW.  */
  new[0] = argv[0];
  while (to < argc)
    {
      int best = -1;
1263
      int best_priority = -9999;
1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292

      /* 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;
    }

1293
  bcopy (new, argv, sizeof (char *) * argc);
1294 1295
}

Jim Blandy's avatar
Jim Blandy committed
1296
DEFUN ("kill-emacs", Fkill_emacs, Skill_emacs, 0, 1, "P",
1297
  "Exit the Emacs job and kill it.\n\
Jim Blandy's avatar
Jim Blandy committed
1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314
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
1315
  if (!NILP (Vrun_hooks) && !noninteractive)
Jim Blandy's avatar
Jim Blandy committed
1316 1317 1318 1319 1320 1321 1322 1323 1324
    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  */
1325

1326
  shut_down_emacs (0, 0, STRINGP (arg) ? arg : Qnil);
1327

1328 1329 1330 1331 1332 1333
  /* 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);

1334
  exit (INTEGERP (arg) ? XINT (arg)
Jim Blandy's avatar
Jim Blandy committed
1335 1336 1337 1338 1339 1340 1341 1342
#ifdef VMS
	: 1
#else
	: 0
#endif
	);
  /* NOTREACHED */
}
1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354


/* 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.  */
1355

1356
void
1357
shut_down_emacs (sig, no_x, stuff)
1358
     int sig, no_x;
1359
     Lisp_Object stuff;
1360
{
1361 1362 1363
  /* Prevent running of hooks from now on.  */
  Vrun_hooks = Qnil;

1364 1365 1366
  /* If we are controlling the terminal, reset terminal modes */
#ifdef EMACS_HAVE_TTY_PGRP
  {
1367 1368
    int pgrp = EMACS_GETPGRP (0);

1369 1370
    int tpgrp;
    if (EMACS_GET_TTY_PGRP (0, &tpgrp) != -1
1371
	&& tpgrp == pgrp)
1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383
      {
	fflush (stdout);
	reset_sys_modes ();
	if (sig && sig != SIGTERM)
	  fprintf (stderr, "Fatal error (%d).", sig);
      }
  }
#else
  fflush (stdout);
  reset_sys_modes ();
#endif

1384 1385
  stuff_buffered_input (stuff);

1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396
  kill_buffer_processes (Qnil);
  Fdo_auto_save (Qt, Qnil);

#ifdef CLASH_DETECTION
  unlock_all_files ();
#endif

#ifdef VMS
  kill_vms_processes ();
#endif

1397
#if 0 /* This triggers a bug in XCloseDisplay and is not needed.  */
1398
#ifdef HAVE_X_WINDOWS
1399 1400 1401 1402 1403
  /* 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)
1404 1405
    Fx_close_current_connection ();
#endif /* HAVE_X_WINDOWS */
1406
#endif
1407

1408 1409 1410 1411 1412 1413
#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
1414 1415 1416 1417

#ifdef WINDOWSNT
  term_ntproc ();
#endif
1418 1419 1420
}


Jim Blandy's avatar
Jim Blandy committed
1421 1422 1423 1424 1425 1426 1427 1428

#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.")
1429 1430
  (filename)
     Lisp_Object filename;
Jim Blandy's avatar
Jim Blandy committed
1431
{
1432
  extern char my_edata[];
Jim Blandy's avatar
Jim Blandy committed
1433 1434
  Lisp_Object tem;

1435 1436
  CHECK_STRING (filename, 0);
  filename = Fexpand_file_name (filename, Qnil);
Jim Blandy's avatar
Jim Blandy committed
1437 1438 1439 1440 1441 1442 1443 1444

  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
1445
  memory_warnings (my_edata, malloc_warning);
Jim Blandy's avatar
Jim Blandy committed
1446
#endif
1447
  map_out_data (XSTRING (filename)->data);