emacs.c 44.1 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
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 85 86 87 88 89 90 91 92 93
#ifdef DOUG_LEA_MALLOC
/* Preserves a pointer to the memory allocated that copies that
   static data inside glibc's malloc.  */
void *malloc_state_ptr;
/* From glibc, a routine that returns a copy of the malloc internal state.  */
extern void *malloc_get_state ();
/* From glibc, a routine that overwrites the malloc internal state.  */
extern void malloc_set_state ();
#endif

94
/* Variable whose value is symbol giving operating system type.  */
Jim Blandy's avatar
Jim Blandy committed
95
Lisp_Object Vsystem_type;
96 97 98

/* Variable whose value is string giving configuration built for.  */
Lisp_Object Vsystem_configuration;
99 100 101 102 103

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

104 105
Lisp_Object Qfile_name_handler_alist;

Jim Blandy's avatar
Jim Blandy committed
106 107 108 109
/* 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;

110 111 112
/* 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.  */
113 114
int emacs_priority;

115 116 117 118
/* 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;

119
#ifdef BSD_PGRPS
120 121 122 123
/* See sysdep.c.  */
extern int inherited_pgroup;
#endif

Jim Blandy's avatar
Jim Blandy committed
124 125 126 127 128 129 130 131 132
#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;

133
#ifdef HAVE_WINDOW_SYSTEM
Jim Blandy's avatar
Jim Blandy committed
134
extern Lisp_Object Vwindow_system;
135
#endif /* HAVE_WINDOW_SYSTEM */
Jim Blandy's avatar
Jim Blandy committed
136

137 138
extern Lisp_Object Vauto_save_list_file_name;

Jim Blandy's avatar
Jim Blandy committed
139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154
#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;
155 156 157 158

/* Save argv and argc.  */
char **initial_argv;
int initial_argc;
159 160

static void sort_args ();
Jim Blandy's avatar
Jim Blandy committed
161 162 163 164 165 166 167 168

/* 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
169
SIGTYPE
Jim Blandy's avatar
Jim Blandy committed
170 171 172 173 174 175
fatal_error_signal (sig)
     int sig;
{
  fatal_error_code = sig;
  signal (sig, SIG_DFL);

176 177
  TOTALLY_UNBLOCK_INPUT;

Jim Blandy's avatar
Jim Blandy committed
178
  /* If fatal error occurs in code below, avoid infinite recursion.  */
179 180 181
  if (! fatal_error_in_progress)
    {
      fatal_error_in_progress = 1;
Jim Blandy's avatar
Jim Blandy committed
182

183
      shut_down_emacs (sig, 0, Qnil);
184
    }
Jim Blandy's avatar
Jim Blandy committed
185 186 187 188

#ifdef VMS
  LIB$STOP (SS$_ABORT);
#else
189 190 191 192
  /* 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.  */
193
#ifndef MSDOS
194
  sigunblock (sigmask (fatal_error_code));
195
#endif
Jim Blandy's avatar
Jim Blandy committed
196 197 198
  kill (getpid (), fatal_error_code);
#endif /* not VMS */
}
199 200 201

#ifdef SIGDANGER

Richard M. Stallman's avatar
Richard M. Stallman committed
202
/* Handler for SIGDANGER.  */
203 204 205 206 207 208 209
SIGTYPE
memory_warning_signal (sig)
     int sig;
{
  signal (sig, memory_warning_signal);

  malloc_warning ("Operating system warns that virtual memory is running low.\n");
210 211 212

  /* It might be unsafe to call do_auto_save now.  */
  force_auto_save_soon ();
213 214
}
#endif
Jim Blandy's avatar
Jim Blandy committed
215 216 217 218 219 220 221 222 223 224

/* 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;
225 226 227
  Lisp_Object name, dir, tem;
  int count = specpdl_ptr - specpdl;
  Lisp_Object raw_name;
Jim Blandy's avatar
Jim Blandy committed
228

229 230 231
  initial_argv = argv;
  initial_argc = argc;

232 233 234 235 236 237 238 239 240 241 242
  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);

243 244 245 246 247 248
  /* 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
249
		       EXEC_SUFFIXES, &found, 1);
250
      if (yes == 1)
251 252 253 254 255 256 257 258
	{
	  /* 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);
	}
259
    }
260

261 262
  if (!NILP (Vinvocation_directory)
      && NILP (Ffile_name_absolute_p (Vinvocation_directory)))
263 264
    /* Emacs was started with relative path, like ./emacs.
       Make it absolute.  */
265 266
    Vinvocation_directory = Fexpand_file_name (Vinvocation_directory, Qnil);

267 268 269 270 271 272 273 274
  Vinstallation_directory = Qnil;

  if (!NILP (Vinvocation_directory))
    {
      dir = Vinvocation_directory;
      name = Fexpand_file_name (Vinvocation_name, dir);
      while (1)
	{
275
	  Lisp_Object tem, lib_src_exists;
276 277
	  Lisp_Object etc_exists, info_exists;

278 279 280 281 282
	  /* 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);
283

284
#ifdef MSDOS
285 286 287 288 289
	  /* 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);
290 291 292
#else
	  info_exists = Qnil;
#endif
293 294

	  if (!NILP (lib_src_exists) || !NILP (info_exists))
295
	    {
296 297 298
	      tem = Fexpand_file_name (build_string ("etc"), dir);
	      etc_exists = Ffile_exists_p (tem);
	      if (!NILP (etc_exists))
299
		{
300 301 302
		  Vinstallation_directory
		    = Ffile_name_as_directory (dir);
		  break;
303 304 305 306
		}
	    }

	  /* See if dir's parent contains those subdirs.  */
307 308
	  tem = Fexpand_file_name (build_string ("../lib-src"), dir);
	  lib_src_exists = Ffile_exists_p (tem);
309

310 311 312

#ifdef MSDOS
	  /* See the MSDOS commentary above.  */
313 314
	  tem = Fexpand_file_name (build_string ("../info"), dir);
	  info_exists = Ffile_exists_p (tem);
315 316 317
#else
	  info_exists = Qnil;
#endif
318 319

	  if (!NILP (lib_src_exists) || !NILP (info_exists))
320
	    {
321 322 323
	      tem = Fexpand_file_name (build_string ("../etc"), dir);
	      etc_exists = Ffile_exists_p (tem);
	      if (!NILP (etc_exists))
324
		{
325 326 327 328
		  tem = Fexpand_file_name (build_string (".."), dir);
		  Vinstallation_directory
		    = Ffile_name_as_directory (tem);
		  break;
329 330 331 332 333 334 335 336
		}
	    }

	  /* 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))
	    {
337
	      name = Fexpand_file_name (tem, dir);
338 339 340 341 342 343 344
	      dir = Ffile_name_directory (name);
	    }
	  else
	    break;
	}
    }

Jim Blandy's avatar
Jim Blandy committed
345 346 347 348 349 350 351 352
  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);
    }
353 354

  unbind_to (count, Qnil);
Jim Blandy's avatar
Jim Blandy committed
355
}
356 357 358 359 360 361 362 363 364

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);
}

365 366 367 368 369 370 371 372
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
373 374 375

#ifdef VMS
#ifdef LINK_CRTL_SHARE
376
#ifdef SHARABLE_LIB_BUG
Jim Blandy's avatar
Jim Blandy committed
377
extern noshare char **environ;
378
#endif /* SHARABLE_LIB_BUG */
Jim Blandy's avatar
Jim Blandy committed
379 380 381
#endif /* LINK_CRTL_SHARE */
#endif /* VMS */

382 383 384 385 386 387
#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

388
#ifndef ORDINARY_LINK
389 390 391 392 393
/* 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__
394
#ifndef GCC_CTORS_IN_LIBC
395
__do_global_ctors ()
396
{}
397 398
__do_global_ctors_aux ()
{}
399 400
__do_global_dtors ()
{}
401 402
/* Linux has a bug in its library; avoid an error.  */
#ifndef LINUX
403
char * __CTOR_LIST__[2] = { (char *) (-1), 0 };
404
#endif
405
char * __DTOR_LIST__[2] = { (char *) (-1), 0 };
406
#endif /* GCC_CTORS_IN_LIBC */
407
__main ()
408 409
{}
#endif /* __GNUC__ */
410
#endif /* ORDINARY_LINK */
411

Karl Heuer's avatar
Karl Heuer committed
412 413 414 415 416 417 418 419 420
/* 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.  */
421

Karl Heuer's avatar
Karl Heuer committed
422
static int
423
argmatch (argv, argc, sstr, lstr, minlen, valptr, skipptr)
Karl Heuer's avatar
Karl Heuer committed
424
     char **argv;
425
     int argc;
Karl Heuer's avatar
Karl Heuer committed
426 427 428 429 430 431 432 433
     char *sstr;
     char *lstr;
     int minlen;
     char **valptr;
     int *skipptr;
{
  char *p;
  int arglen;
434 435 436 437 438 439 440
  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
441 442 443 444 445 446 447 448 449 450 451 452 453 454 455
  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));
456
  if (lstr == 0 || arglen < minlen || strncmp (arg, lstr, arglen) != 0)
Karl Heuer's avatar
Karl Heuer committed
457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480
    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
481 482 483 484 485 486 487 488 489 490
/* 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;
491 492 493
#ifdef HAVE_SETRLIMIT
  struct rlimit rlim;
#endif
Jim Blandy's avatar
Jim Blandy committed
494

495 496 497 498
#ifdef LINUX_SBRK_BUG
  __sbrk (1);
#endif

499 500 501 502 503 504 505 506
#ifdef DOUG_LEA_MALLOC
  if (initialized)
    {
      malloc_set_state (malloc_state_ptr);
      free (malloc_state_ptr);
    }
#endif

507 508
  sort_args (argc, argv);

509 510 511 512 513 514 515 516 517 518 519
  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
	{
520
	  printf ("GNU Emacs %s\n", XSTRING (tem)->data);
521 522 523 524 525 526
	  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");
527 528 529 530
	  exit (0);
	}
    }

Jim Blandy's avatar
Jim Blandy committed
531 532
/* Map in shared memory, if we are using that.  */
#ifdef HAVE_SHM
533
  if (argmatch (argv, argc, "-nl", "--no-shared-memory", 6, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
534 535 536 537 538 539 540 541 542 543 544 545 546
    {
      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

547
#ifdef NeXT
548 549 550 551 552 553 554
  {
    extern int malloc_cookie;
    /* This helps out unexnext.c.  */
    if (initialized)
      if (malloc_jumpstart (malloc_cookie) != 0)
	printf ("malloc jumpstart failed!\n");
  }
555 556
#endif /* NeXT */

Jim Blandy's avatar
Jim Blandy committed
557 558
#ifdef VMS
  /* If -map specified, map the data file in */
Karl Heuer's avatar
Karl Heuer committed
559 560
  {
    char *file;
561
    if (argmatch (argv, argc, "-map", "--map-data", 3, &mapin_file, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
562 563
      mapin_data (file);
  }
Jim Blandy's avatar
Jim Blandy committed
564 565

#ifdef LINK_CRTL_SHARE
566
#ifdef SHARABLE_LIB_BUG
Jim Blandy's avatar
Jim Blandy committed
567 568 569 570 571 572 573 574 575
  /* 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;
576
#endif /* SHARABLE_LIB_BUG */
Jim Blandy's avatar
Jim Blandy committed
577 578 579
#endif /* LINK_CRTL_SHARE */
#endif /* VMS */

580 581 582 583
#ifdef HAVE_SETRLIMIT
  /* Extend the stack space available.  */
  if (!getrlimit (RLIMIT_STACK, &rlim))
    {
584 585 586 587 588 589 590 591
      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;

592 593 594 595
      setrlimit (RLIMIT_STACK, &rlim);
    }
#endif

Jim Blandy's avatar
Jim Blandy committed
596 597 598 599 600 601 602 603 604 605
  /* 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)
606
    brk ((void *)bss_end);
Jim Blandy's avatar
Jim Blandy committed
607 608 609
#endif

  clearerr (stdin);
610

Jim Blandy's avatar
Jim Blandy committed
611 612
#ifndef SYSTEM_MALLOC
  if (! initialized)
613 614 615 616 617 618 619 620
    {
      /* 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
621 622
#endif	/* not SYSTEM_MALLOC */

623 624 625 626
#ifdef MSDOS
  /* We do all file input/output as binary files.  When we need to translate
     newlines, we do that manually.  */
  _fmode = O_BINARY;
627 628 629 630 631 632 633 634 635 636

#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 */
637 638 639
  (stdin)->_flag &= ~_IOTEXT;
  (stdout)->_flag &= ~_IOTEXT;
  (stderr)->_flag &= ~_IOTEXT;
640
#endif /* not __DJGPP__ >= 2 */
641 642
#endif /* MSDOS */

643
#ifdef SET_EMACS_PRIORITY
644
  if (emacs_priority)
645
    nice (emacs_priority);
Jim Blandy's avatar
Jim Blandy committed
646
  setuid (getuid ());
647
#endif /* SET_EMACS_PRIORITY */
Jim Blandy's avatar
Jim Blandy committed
648

649
#ifdef EXTRA_INITIALIZE
650
  EXTRA_INITIALIZE;
651 652
#endif

Jim Blandy's avatar
Jim Blandy committed
653 654
  inhibit_window_system = 0;

Jim Blandy's avatar
Jim Blandy committed
655
  /* Handle the -t switch, which specifies filename to use as terminal */
Karl Heuer's avatar
Karl Heuer committed
656 657
  {
    char *term;
658
    if (argmatch (argv, argc, "-t", "--terminal", 4, &term, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676
      {
	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);
677
#ifdef HAVE_WINDOW_SYSTEM
Karl Heuer's avatar
Karl Heuer committed
678
	inhibit_window_system = 1; /* -t => -nw */
Jim Blandy's avatar
Jim Blandy committed
679
#endif
Karl Heuer's avatar
Karl Heuer committed
680 681
      }
  }
682
  if (argmatch (argv, argc, "-nw", "--no-windows", 6, NULL, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
683
    inhibit_window_system = 1;
Jim Blandy's avatar
Jim Blandy committed
684

Karl Heuer's avatar
Karl Heuer committed
685
  /* Handle the -batch switch, which means don't do interactive display.  */
Jim Blandy's avatar
Jim Blandy committed
686
  noninteractive = 0;
687
  if (argmatch (argv, argc, "-batch", "--batch", 5, NULL, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
688 689 690
    noninteractive = 1;

  /* Handle the --help option, which gives a usage message..  */
691
  if (argmatch (argv, argc, "-help", "--help", 3, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
692
    {
Karl Heuer's avatar
Karl Heuer committed
693 694 695
      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
696
      [--version] [--no-site-file]\n\
Karl Heuer's avatar
Karl Heuer committed
697
      [-f func] [--funcall func]  [-l file] [--load file]  [--insert file]\n\
698 699 700
      [+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
701
      exit (0);
Jim Blandy's avatar
Jim Blandy committed
702 703
    }

704 705 706 707 708 709
#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.  */
  {
710
    char *displayname = 0;
711 712 713
    int i;
    int count_before = skip_args;

714
    if (argmatch (argv, argc, "-d", "--display", 3, &displayname, &skip_args))
715
      display_arg = 1;
716
    else if (argmatch (argv, argc, "-display", 0, 3, &displayname, &skip_args))
717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735
      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++;
      }
736 737 738
    /* Change --display to -d, when its arg is separate.  */
    else if (displayname != 0 && skip_args > count_before
	     && argv[count_before + 1][1] == '-')
739
      argv[count_before + 1] = "-d";
740 741 742 743 744 745

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

746 747 748 749 750 751 752 753 754 755 756 757 758 759 760
  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
761 762 763 764
#ifdef POSIX_SIGNALS
  init_signals ();
#endif

765 766 767 768 769 770 771
  /* Don't catch SIGHUP if dumping.  */
  if (1
#ifndef CANNOT_DUMP
      && initialized
#endif
      )
    {
772
      sigblock (sigmask (SIGHUP));
773 774 775 776 777
      /* 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);
778
      sigunblock (sigmask (SIGHUP));
779 780
    }

Jim Blandy's avatar
Jim Blandy committed
781 782 783 784 785 786 787 788
  if (
#ifndef CANNOT_DUMP
      ! noninteractive || initialized
#else
      1
#endif
      )
    {
789
      /* Don't catch these signals in batch mode if dumping.
Jim Blandy's avatar
Jim Blandy committed
790 791 792 793 794
	 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);
795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815
#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
816 817
#ifdef SIGIOT
      /* This is missing on some systems - OS/2, for example.  */
Jim Blandy's avatar
Jim Blandy committed
818
      signal (SIGIOT, fatal_error_signal);
819
#endif
Jim Blandy's avatar
Jim Blandy committed
820 821 822 823
#ifdef SIGEMT
      signal (SIGEMT, fatal_error_signal);
#endif
      signal (SIGFPE, fatal_error_signal);
824
#ifdef SIGBUS
Jim Blandy's avatar
Jim Blandy committed
825
      signal (SIGBUS, fatal_error_signal);
826
#endif
Jim Blandy's avatar
Jim Blandy committed
827
      signal (SIGSEGV, fatal_error_signal);
828
#ifdef SIGSYS
Jim Blandy's avatar
Jim Blandy committed
829
      signal (SIGSYS, fatal_error_signal);
830
#endif
Jim Blandy's avatar
Jim Blandy committed
831 832 833 834 835 836 837 838
      signal (SIGTERM, fatal_error_signal);
#ifdef SIGXCPU
      signal (SIGXCPU, fatal_error_signal);
#endif
#ifdef SIGXFSZ
      signal (SIGXFSZ, fatal_error_signal);
#endif /* SIGXFSZ */

839 840 841 842 843
#ifdef SIGDANGER
      /* This just means available memory is getting low.  */
      signal (SIGDANGER, memory_warning_signal);
#endif

Jim Blandy's avatar
Jim Blandy committed
844
#ifdef AIX
845 846
/* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU.  */
      signal (SIGXCPU, fatal_error_signal);
847
#ifndef _I386
Jim Blandy's avatar
Jim Blandy committed
848
      signal (SIGIOINT, fatal_error_signal);
849
#endif
Jim Blandy's avatar
Jim Blandy committed
850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865
      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 ();
866 867
      init_charset_once ();
      init_coding_once ();
Jim Blandy's avatar
Jim Blandy committed
868
      init_syntax_once ();	/* Create standard syntax table.  */
869
      init_category_once ();	/* Create standard category table.  */
Jim Blandy's avatar
Jim Blandy committed
870 871 872 873 874 875 876 877 878 879 880
		      /* 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 ();
881
  running_asynch_code = 0;
882

883 884 885 886
#ifdef MSDOS
  /* Call early 'cause init_environment needs it.  */
  init_dosfns ();
  /* Set defaults for several environment variables.  */
887 888 889
  if (initialized)
    init_environment (argc, argv, skip_args);
  else
890
    tzset ();
891
#endif /* MSDOS */
892

893 894 895
#ifdef WINDOWSNT
  /* Initialize environment from registry settings.  */
  init_environment ();
896
  init_ntproc ();	/* must precede init_editfns */
897 898
#endif

899 900 901 902
  /* 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 ();
903 904 905 906 907 908
  /* 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
909

910 911
  init_buffer ();	/* Init default directory of main buffer */

912
  init_callproc_1 ();	/* Must precede init_cmdargs and init_sys_modes.  */
913
  init_cmdargs (argc, argv, skip_args);	/* Must precede init_lread.  */
914 915 916 917 918 919 920 921 922 923 924

  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;
    }

925
  init_callproc ();	/* Must follow init_cmdargs but not init_sys_modes.  */
Jim Blandy's avatar
Jim Blandy committed
926
  init_lread ();
Jim Blandy's avatar
Jim Blandy committed
927 928 929 930

  if (!noninteractive)
    {
#ifdef VMS
Jim Blandy's avatar
Jim Blandy committed
931
      init_vms_input ();/* init_display calls get_frame_size, that needs this */
Jim Blandy's avatar
Jim Blandy committed
932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
#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
950 951 952
#ifdef CLASH_DETECTION
  init_filelock ();
#endif /* CLASH_DETECTION */
Jim Blandy's avatar
Jim Blandy committed
953 954 955 956 957 958 959 960 961 962

/* 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
963
      syms_of_lread ();
Jim Blandy's avatar
Jim Blandy committed
964 965 966 967 968 969 970 971 972 973 974 975
      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 ();
976 977 978
      syms_of_category ();
      syms_of_ccl ();
      syms_of_charset ();
Jim Blandy's avatar
Jim Blandy committed
979 980 981 982 983 984 985 986 987
      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 ();
988
      syms_of_coding ();	/* This should be after syms_of_fileio.  */
Jim Blandy's avatar
Jim Blandy committed
989 990 991 992
#ifdef CLASH_DETECTION
      syms_of_filelock ();
#endif /* CLASH_DETECTION */
      syms_of_indent ();
993
      syms_of_insdel ();
Jim Blandy's avatar
Jim Blandy committed
994 995 996 997 998 999 1000 1001
      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
1002
      syms_of_frame ();
Jim Blandy's avatar
Jim Blandy committed
1003
      syms_of_syntax ();
Karl Heuer's avatar
Karl Heuer committed
1004
      syms_of_term ();
Jim Blandy's avatar
Jim Blandy committed
1005
      syms_of_undo ();
Joseph Arceneaux's avatar
Joseph Arceneaux committed
1006 1007 1008

      /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
      syms_of_textprop ();
Jim Blandy's avatar
Jim Blandy committed
1009 1010 1011
#ifdef VMS
      syms_of_vmsproc ();
#endif /* VMS */
1012 1013 1014
#ifdef WINDOWSNT
      syms_of_ntproc ();
#endif /* WINDOWSNT */
Jim Blandy's avatar
Jim Blandy committed
1015 1016 1017
      syms_of_window ();
      syms_of_xdisp ();
#ifdef HAVE_X_WINDOWS
Jim Blandy's avatar
Jim Blandy committed
1018
      syms_of_xterm ();
Jim Blandy's avatar
Jim Blandy committed
1019
      syms_of_xfns ();
1020
      syms_of_fontset ();
Jim Blandy's avatar
Jim Blandy committed
1021 1022 1023
#ifdef HAVE_X11
      syms_of_xselect ();
#endif
Jim Blandy's avatar
Jim Blandy committed
1024 1025
#endif /* HAVE_X_WINDOWS */

1026
#ifndef HAVE_NTGUI
1027
      syms_of_xfaces ();
1028
      syms_of_xmenu ();
1029
#endif
1030

1031
#ifdef HAVE_NTGUI
1032 1033 1034 1035 1036
      syms_of_w32term ();
      syms_of_w32fns ();
      syms_of_w32faces ();
      syms_of_w32select ();
      syms_of_w32menu ();
1037 1038
#endif /* HAVE_NTGUI */

Jim Blandy's avatar
Jim Blandy committed
1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054
#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 ();
1055
      keys_of_frame ();
Jim Blandy's avatar
Jim Blandy committed
1056 1057 1058 1059
    }

  if (!initialized)
    {
Karl Heuer's avatar
Karl Heuer committed
1060
      char *file;
Jim Blandy's avatar
Jim Blandy committed
1061
      /* Handle -l loadup-and-dump, args passed by Makefile. */
1062
      if (argmatch (argv, argc, "-l", "--load", 3, &file, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
1063
	Vtop_level = Fcons (intern ("load"),
Karl Heuer's avatar
Karl Heuer committed
1064
			    Fcons (build_string (file), Qnil));
Jim Blandy's avatar
Jim Blandy committed
1065 1066
#ifdef CANNOT_DUMP
      /* Unless next switch is -nl, load "loadup.el" first thing.  */
1067
      if (!argmatch (argv, argc, "-nl", "--no-loadup", 6, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
1068 1069 1070 1071 1072
	Vtop_level = Fcons (intern ("load"),
			    Fcons (build_string ("loadup.el"), Qnil));
#endif /* CANNOT_DUMP */
    }

1073 1074
  if (initialized)
    {
1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
#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
1091 1092
    }

Jim Blandy's avatar
Jim Blandy committed
1093 1094
  initialized = 1;

1095 1096
#ifdef LOCALTIME_CACHE
  /* Some versions of localtime have a bug.  They cache the value of the time
Jim Blandy's avatar
Jim Blandy committed
1097 1098
     zone rather than looking it up every time.  Since localtime() is
     called to bolt the undumping time into the undumped emacs, this
1099 1100 1101
     results in localtime ignoring the TZ environment variable.
     This flushes the new TZ value into localtime. */
  tzset ();
1102
#endif /* defined (LOCALTIME_CACHE) */
Jim Blandy's avatar
Jim Blandy committed
1103

Jim Blandy's avatar
Jim Blandy committed
1104 1105 1106 1107 1108
  /* Enter editor command loop.  This never returns.  */
  Frecursive_edit ();
  /* NOTREACHED */
}

1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123
/* 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[] =
{
1124 1125
  { "-version", "--version", 110, 0 },
  { "-help", "--help", 110, 0 },
1126
  { "-nl", "--no-shared-memory", 100, 0 },
1127
#ifdef VMS
1128
  { "-map", "--map-data", 100, 0 },
1129
#endif
1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140
  { "-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 },
1141 1142
  { "-i", "--icon-type", 15, 0 },
  { "-itype", 0, 15, 0 },
1143
  { "-iconic", "--iconic", 15, 0 },
1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157
  { "-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 },
1158
  { "-title", 0, 10, 1 },
1159 1160
  { "-name", "--name", 10, 1 },
  { "-xrm", "--xrm", 10, 1 },
1161 1162 1163
  { "-r", "--reverse-video", 5, 0 },
  { "-rv", 0, 5, 0 },
  { "-reverse", 0, 5, 0 },
1164
  { "-hb", "--horizontal-scroll-bars", 5, 0 },
1165 1166 1167
  { "-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.  */
1168 1169
  { "-L", "--directory", 0, 1 },
  { "-directory", 0, 0, 1 },
1170 1171 1172 1173
  { "-l", "--load", 0, 1 },
  { "-load", 0, 0, 1 },
  { "-f", "--funcall", 0, 1 },
  { "-funcall", 0, 0, 1 },
1174
  { "-eval", "--eval", 0, 1 },
1175 1176
  { "-find-file", "--find-file", 0, 1 },
  { "-visit", "--visit", 0, 1 },
1177
  { "-insert", "--insert", 0, 1 },
1178
  /* This should be processed after ordinary file name args and the like.  */
1179
  { "-kill", "--kill", -10, 0 },
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197
};

/* 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.  */
1198
  int *options = (int *) xmalloc (sizeof (int) * argc);
1199 1200 1201 1202
  int *priority = (int *) xmalloc (sizeof (int) * argc);
  int to = 1;
  int from;
  int i;
1203
  int end_of_options = argc;
1204 1205 1206 1207 1208 1209

  /* Categorize all the options,
     and figure out which argv elts are option arguments.  */
  for (from = 1; from < argc; from++)
    {
      options[from] = -1;
1210
      priority[from] = 0;
1211 1212 1213 1214 1215
      if (argv[from][0] == '-')
	{
	  int match, thislen;
	  char *equals;

1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228
	  /* 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;
	    }

1229 1230 1231 1232 1233 1234
	  /* 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;
1235 1236
		if (from + standard_args[i].nargs >= argc)
		  fatal ("Option `%s' requires an argument\n", argv[from]);
1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251
		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];

1252 1253 1254 1255 1256
	      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))
1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272
		  {
		    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;
1273 1274
		  if (from + options[from] >= argc)
		    fatal ("Option `%s' requires an argument\n", argv[from]);
1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286
		  from += options[from];
		}
	    }
	done: ;
	}
    }

  /* Copy the arguments, in order of decreasing priority, to NEW.  */
  new[0] = argv[0];
  while (to < argc)
    {
      int best = -1;
1287
      int best_priority = -9999;
1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316

      /* 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;
    }

1317
  bcopy (new, argv, sizeof (char *) * argc);
1318 1319 1320 1321

  free (options);
  free (new);
  free (priority);
1322 1323
}

Jim Blandy's avatar
Jim Blandy committed
1324
DEFUN ("kill-emacs", Fkill_emacs, Skill_emacs, 0, 1, "P",
1325
  "Exit the Emacs job and kill it.\n\
Jim Blandy's avatar
Jim Blandy committed
1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342
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
1343
  if (!NILP (Vrun_hooks) && !noninteractive)
Jim Blandy's avatar
Jim Blandy committed
1344 1345 1346 1347 1348 1349 1350 1351 1352
    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  */
1353

1354
  shut_down_emacs (0, 0, STRINGP (arg) ? arg : Qnil);
1355

1356 1357 1358 1359 1360 1361
  /* 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);

1362
  exit (INTEGERP (arg) ? XINT (arg)
Jim Blandy's avatar
Jim Blandy committed
1363 1364 1365 1366 1367 1368 1369 1370
#ifdef VMS
	: 1
#else
	: 0
#endif
	);
  /* NOTREACHED */
}
1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382


/* 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.  */
1383

1384
void
1385
shut_down_emacs (sig, no_x, stuff)
1386
     int sig, no_x;
1387
     Lisp_Object stuff;
1388
{
1389 1390 1391
  /* Prevent running of hooks from now on.  */
  Vrun_hooks = Qnil;

1392 1393 1394
  /* If we are controlling the terminal, reset terminal modes */
#ifdef EMACS_HAVE_TTY_PGRP
  {
1395 1396
    int pgrp = EMACS_GETPGRP (0);

1397 1398
    int tpgrp;
    if (EMACS_GET_TTY_PGRP (0, &tpgrp) != -1
1399
	&& tpgrp == pgrp)
1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411
      {
	fflush (stdout);
	reset_sys_modes ();
	if (sig && sig != SIGTERM)
	  fprintf (stderr, "Fatal error (%d).", sig);
      }
  }
#else
  fflush (stdout);
  reset_sys_modes ();
#endif

1412 1413
  stuff_buffered_input (stuff);

1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424
  kill_buffer_processes (Qnil);
  Fdo_auto_save (Qt, Qnil);

#ifdef CLASH_DETECTION
  unlock_all_files ();
#endif

#ifdef VMS
  kill_vms_processes ();
#endif

1425
#if 0 /* This triggers a bug in XCloseDisplay and is not needed.  */
1426
#ifdef HAVE_X_WINDOWS
1427 1428 1429 1430 1431
  /* 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)
1432 1433
    Fx_close_current_connection ();
#endif /* HAVE_X_WINDOWS */
1434
#endif
1435

1436 1437 1438 1439 1440 1441
#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
1442 1443 1444 1445

#ifdef WINDOWSNT
  term_ntproc ();
#endif
1446 1447 1448
}


Jim Blandy's avatar