emacs.c 70.7 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* Fully extensible Emacs, running on Unix, intended for GNU.
2 3
   Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1997, 1998, 1999,
                 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
Jim Blandy's avatar
Jim Blandy committed
4 5 6 7 8

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
9
the Free Software Foundation; either version 2, or (at your option)
Jim Blandy's avatar
Jim Blandy committed
10 11 12 13 14 15 16 17 18
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
Lute Kamstra's avatar
Lute Kamstra committed
19 20
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.  */
Jim Blandy's avatar
Jim Blandy committed
21 22


23
#include <config.h>
Jim Blandy's avatar
Jim Blandy committed
24 25 26 27 28 29 30 31 32 33 34
#include <signal.h>
#include <errno.h>
#include <stdio.h>

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

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

35 36 37 38
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

39
#ifdef BSD_SYSTEM
Jim Blandy's avatar
Jim Blandy committed
40 41 42
#include <sys/ioctl.h>
#endif

43 44
#ifdef WINDOWSNT
#include <fcntl.h>
45 46
#include <windows.h> /* just for w32.h */
#include "w32.h"
47
#include "w32heap.h" /* for prototype of sbrk */
48 49
#endif

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

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

64 65 66 67
#ifdef HAVE_SETLOCALE
#include <locale.h>
#endif

68 69 70 71 72
#ifdef HAVE_SETRLIMIT
#include <sys/time.h>
#include <sys/resource.h>
#endif

73 74 75 76
#ifdef HAVE_PERSONALITY_LINUX32
#include <sys/personality.h>
#endif

Jim Blandy's avatar
Jim Blandy committed
77 78 79 80
#ifndef O_RDWR
#define O_RDWR 2
#endif

81
#ifdef HAVE_SETPGID
82
#if !defined (USG) || defined (BSD_PGRPS)
83
#undef setpgrp
84 85
#define setpgrp setpgid
#endif
86
#endif
87

88 89
extern void malloc_warning P_ ((char *));
extern void set_time_zone_rule P_ ((char *));
Gerd Moellmann's avatar
Gerd Moellmann committed
90 91 92
#ifdef HAVE_INDEX
extern char *index P_ ((const char *, int));
#endif
93

94 95
/* Make these values available in GDB, which doesn't see macros.  */

96 97 98 99 100 101 102 103 104 105
#ifdef USE_LSB_TAG
int gdb_use_lsb = 1;
#else
int gdb_use_lsb = 0;
#endif
#ifdef NO_UNION_TYPE
int gdb_use_union = 0;
#else
int gdb_use_union = 1;
#endif
106 107 108 109 110
EMACS_INT gdb_valbits = VALBITS;
EMACS_INT gdb_gctypebits = GCTYPEBITS;
#ifdef DATA_SEG_BITS
EMACS_INT gdb_data_seg_bits = DATA_SEG_BITS;
#else
111
EMACS_INT gdb_data_seg_bits = 0;
112
#endif
Gerd Moellmann's avatar
Gerd Moellmann committed
113
EMACS_INT PVEC_FLAG = PSEUDOVECTOR_FLAG;
114
EMACS_INT gdb_array_mark_flag = ARRAY_MARK_FLAG;
115

Pavel Janík's avatar
Pavel Janík committed
116
/* Command line args from shell, as list of strings.  */
Jim Blandy's avatar
Jim Blandy committed
117 118
Lisp_Object Vcommand_line_args;

119 120 121 122
/* The name under which Emacs was invoked, with any leading directory
   names discarded.  */
Lisp_Object Vinvocation_name;

123 124 125
/* The directory name from which Emacs was invoked.  */
Lisp_Object Vinvocation_directory;

126 127 128 129
/* 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
130 131 132
/* Hook run by `kill-emacs' before it does really anything.  */
Lisp_Object Vkill_emacs_hook;

Stefan Monnier's avatar
Stefan Monnier committed
133 134 135
/* An empty lisp string.  To avoid having to build any other.  */
Lisp_Object empty_string;

136 137 138
/* Search path separator.  */
Lisp_Object Vpath_separator;

Jim Blandy's avatar
Jim Blandy committed
139 140 141 142 143
/* Set nonzero after Emacs has started up the first time.
  Prevents reinitialization of the Lisp world and keymaps
  on subsequent starts.  */
int initialized;

144 145 146 147 148 149 150
#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.  */
151
extern int malloc_set_state ();
152 153 154
/* Non-zero if the MALLOC_CHECK_ enviroment variable was set while
   dumping.  Used to work around a bug in glibc's malloc.  */
int malloc_using_checking;
155 156
#endif

157
/* Variable whose value is symbol giving operating system type.  */
Jim Blandy's avatar
Jim Blandy committed
158
Lisp_Object Vsystem_type;
159 160 161

/* Variable whose value is string giving configuration built for.  */
Lisp_Object Vsystem_configuration;
162 163 164 165 166

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

167 168
Lisp_Object Qfile_name_handler_alist;

169
/* Current and previous system locales for messages and time.  */
170 171 172 173
Lisp_Object Vsystem_messages_locale;
Lisp_Object Vprevious_system_messages_locale;
Lisp_Object Vsystem_time_locale;
Lisp_Object Vprevious_system_time_locale;
174

Juanma Barranquero's avatar
Juanma Barranquero committed
175
/* If non-zero, emacs should not attempt to use a window-specific code,
Pavel Janík's avatar
Pavel Janík committed
176
   but instead should use the virtual terminal under which it was started.  */
Jim Blandy's avatar
Jim Blandy committed
177 178
int inhibit_window_system;

179 180
/* If nonzero, set Emacs to run at this priority.  This is also used
   in child_setup and sys_suspend to make sure subshells run at normal
Pavel Janík's avatar
Pavel Janík committed
181
   priority; those functions have their own extern declaration.  */
182
EMACS_INT emacs_priority;
183

Pavel Janík's avatar
Pavel Janík committed
184 185
/* 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.  */
186 187
int running_asynch_code;

188
#ifdef BSD_PGRPS
189 190 191 192
/* See sysdep.c.  */
extern int inherited_pgroup;
#endif

Jim Blandy's avatar
Jim Blandy committed
193
#ifdef HAVE_X_WINDOWS
Pavel Janík's avatar
Pavel Janík committed
194
/* If non-zero, -d was specified, meaning we're using some window system.  */
Jim Blandy's avatar
Jim Blandy committed
195 196 197 198 199 200 201
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;

202 203 204 205 206 207 208 209 210 211 212
/* The address where the heap starts (from the first sbrk (0) call).  */
static void *my_heap_start;

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

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


213
#ifdef HAVE_WINDOW_SYSTEM
Jim Blandy's avatar
Jim Blandy committed
214
extern Lisp_Object Vwindow_system;
215
#endif /* HAVE_WINDOW_SYSTEM */
Jim Blandy's avatar
Jim Blandy committed
216

217 218
extern Lisp_Object Vauto_save_list_file_name;

219 220
extern Lisp_Object Vinhibit_redisplay;

Jim Blandy's avatar
Jim Blandy committed
221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236
#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;
237 238 239 240

/* Save argv and argc.  */
char **initial_argv;
int initial_argc;
241 242

static void sort_args ();
Andreas Schwab's avatar
Andreas Schwab committed
243
void syms_of_emacs ();
Gerd Moellmann's avatar
Gerd Moellmann committed
244

245 246
/* MSVC needs each string be shorter than 2048 bytes, so the usage
   strings below are split to not overflow this limit.  */
247
#define USAGE1 "\
Gerd Moellmann's avatar
Gerd Moellmann committed
248 249 250 251 252 253
Usage: %s [OPTION-OR-FILENAME]...\n\
\n\
Run Emacs, the extensible, customizable, self-documenting real-time\n\
display editor.  The recommended way to start Emacs for normal editing\n\
is with no options at all.\n\
\n\
254
Run M-x info RET m emacs RET m emacs invocation RET inside Emacs to\n\
Gerd Moellmann's avatar
Gerd Moellmann committed
255 256 257 258
read the main documentation for these command-line arguments.\n\
\n\
Initialization options:\n\
\n\
259 260 261 262 263 264 265 266 267
--batch                     do not do interactive display; implies -q\n\
--debug-init                enable Emacs Lisp debugger for init file\n\
--display, -d DISPLAY       use X server DISPLAY\n\
--multibyte, --no-unibyte   inhibit the effect of EMACS_UNIBYTE\n\
--no-desktop                do not load a saved desktop\n\
--no-init-file, -q          load neither ~/.emacs nor default.el\n\
--no-shared-memory, -nl     do not use shared memory\n\
--no-site-file              do not load site-start.el\n\
--no-splash                 do not display a splash screen on startup\n\
268
--no-window-system, -nw     do not communicate with X, ignoring $DISPLAY\n\
269
--quick, -Q                 equivalent to -q --no-site-file --no-splash\n\
270 271
--script FILE               run FILE as an Emacs Lisp script\n\
--terminal, -t DEVICE       use DEVICE for terminal I/O\n\
Gerd Moellmann's avatar
Gerd Moellmann committed
272
--unibyte, --no-multibyte   run Emacs in unibyte mode\n\
273
--user, -u USER             load ~USER/.emacs instead of your own\n\
274 275 276
\n%s"

#define USAGE2 "\
Gerd Moellmann's avatar
Gerd Moellmann committed
277 278
Action options:\n\
\n\
279 280 281 282 283 284 285 286 287 288 289 290 291 292
FILE                    visit FILE using find-file\n\
+LINE FILE              visit FILE using find-file, then go to line LINE\n\
+LINE:COLUMN FILE       visit FILE using find-file, then go to line LINE,\n\
                          column COLUMN\n\
--directory, -L DIR     add DIR to variable load-path\n\
--eval EXPR             evaluate Emacs Lisp expression EXPR\n\
--execute EXPR          evaluate Emacs Lisp expression EXPR\n\
--file FILE             visit FILE using find-file\n\
--find-file FILE        visit FILE using find-file\n\
--funcall, -f FUNC      call Emacs Lisp function FUNC with no arguments\n\
--insert FILE           insert contents of FILE into current buffer\n\
--kill                  exit without asking for confirmation\n\
--load, -l FILE         load Emacs Lisp FILE using the load function\n\
--visit FILE            visit FILE using find-file\n\
293 294
\n"

295
#define USAGE3 "\
296
Display options:\n\
Gerd Moellmann's avatar
Gerd Moellmann committed
297
\n\
298
--background-color, -bg COLOR   window background color\n\
299 300
--basic-display, -D             disable many display features;\n\
                                  used for debugging Emacs\n\
301 302
--border-color, -bd COLOR       main border color\n\
--border-width, -bw WIDTH       width of main border\n\
303
--color, --color=MODE           color mode for character terminals;\n\
304 305 306 307 308 309 310 311 312 313
                                  MODE defaults to `auto', and can also\n\
                                  be `never', `auto', `always',\n\
                                  or a mode name like `ansi8'\n\
--cursor-color, -cr COLOR       color of the Emacs cursor indicating point\n\
--font, -fn FONT                default font; must be fixed-width\n\
--foreground-color, -fg COLOR   window foreground color\n\
--fullheight, -fh               make the first frame high as the screen\n\
--fullscreen, -fs               make first frame fullscreen\n\
--fullwidth, -fw                make the first frame wide as the screen\n\
--geometry, -g GEOMETRY         window geometry\n\
Jan Djärv's avatar
Jan Djärv committed
314
--no-bitmap-icon, -nbi          do not use picture of gnu for Emacs icon\n\
315 316 317 318 319
--iconic                        start Emacs in iconified state\n\
--internal-border, -ib WIDTH    width between text and main border\n\
--line-spacing, -lsp PIXELS     additional space to put between lines\n\
--mouse-color, -ms COLOR        mouse cursor color in Emacs window\n\
--name NAME                     title for initial Emacs frame\n\
320
--no-blinking-cursor, -nbc      disable blinking cursor\n\
321 322 323 324 325 326
--reverse-video, -r, -rv        switch foreground and background\n\
--title, -T TITLE               title for initial Emacs frame\n\
--vertical-scroll-bars, -vb     enable vertical scroll bars\n\
--xrm XRESOURCES                set additional X resources\n\
--help                          display this help and exit\n\
--version                       output version information and exit\n\
327 328 329
\n"

#define USAGE4 "\
Gerd Moellmann's avatar
Gerd Moellmann committed
330 331 332 333 334 335
You can generally also specify long option names with a single -; for\n\
example, -batch as well as --batch.  You can use any unambiguous\n\
abbreviation for a --option.\n\
\n\
Various environment variables and window system resources also affect\n\
Emacs' operation.  See the main documentation.\n\
336
\n\
337
Report bugs to %s.  First, please see the Bugs\n\
Gerd Moellmann's avatar
Gerd Moellmann committed
338 339
section of the Emacs manual or the file BUGS.\n"

Jim Blandy's avatar
Jim Blandy committed
340

Pavel Janík's avatar
Pavel Janík committed
341
/* Signal code for the fatal signal that was received.  */
Jim Blandy's avatar
Jim Blandy committed
342 343
int fatal_error_code;

Pavel Janík's avatar
Pavel Janík committed
344
/* Nonzero if handling a fatal error already.  */
Jim Blandy's avatar
Jim Blandy committed
345 346
int fatal_error_in_progress;

Pavel Janík's avatar
Pavel Janík committed
347
/* If non-null, call this function from fatal_error_signal before
348 349 350 351
   committing suicide.  */

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

352 353 354 355 356 357 358 359
#ifdef HAVE_GTK_AND_PTHREAD
/* When compiled with GTK and running under Gnome, multiple threads meay be
   created.  Keep track of our main thread to make sure signals are delivered
   to it (see syssignal.h).  */

pthread_t main_thread;
#endif

360

361 362 363 364 365
#ifdef SIGUSR1
SIGTYPE
handle_USR1_signal (sig)
     int sig;
{
366 367
  struct input_event buf;

368
  SIGNAL_THREAD_CHECK (sig);
369
  bzero (&buf, sizeof buf);
370
  buf.kind = USER_SIGNAL_EVENT;
371
  buf.frame_or_window = selected_frame;
372 373

  kbd_buffer_store_event (&buf);
374
}
375
#endif /* SIGUSR1 */
Richard M. Stallman's avatar
Richard M. Stallman committed
376

377 378 379 380 381
#ifdef SIGUSR2
SIGTYPE
handle_USR2_signal (sig)
     int sig;
{
382 383
  struct input_event buf;

384
  SIGNAL_THREAD_CHECK (sig);
385
  bzero (&buf, sizeof buf);
386
  buf.kind = USER_SIGNAL_EVENT;
387
  buf.code = 1;
388
  buf.frame_or_window = selected_frame;
389 390

  kbd_buffer_store_event (&buf);
391
}
392
#endif /* SIGUSR2 */
393

Pavel Janík's avatar
Pavel Janík committed
394
/* Handle bus errors, invalid instruction, etc.  */
Jim Blandy's avatar
Jim Blandy committed
395
SIGTYPE
Jim Blandy's avatar
Jim Blandy committed
396 397 398
fatal_error_signal (sig)
     int sig;
{
399
  SIGNAL_THREAD_CHECK (sig);
Jim Blandy's avatar
Jim Blandy committed
400 401 402
  fatal_error_code = sig;
  signal (sig, SIG_DFL);

403 404
  TOTALLY_UNBLOCK_INPUT;

Jim Blandy's avatar
Jim Blandy committed
405
  /* If fatal error occurs in code below, avoid infinite recursion.  */
406 407 408
  if (! fatal_error_in_progress)
    {
      fatal_error_in_progress = 1;
Jim Blandy's avatar
Jim Blandy committed
409

410
      shut_down_emacs (sig, 0, Qnil);
411
    }
Jim Blandy's avatar
Jim Blandy committed
412 413 414 415

#ifdef VMS
  LIB$STOP (SS$_ABORT);
#else
416 417 418 419
  /* 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.  */
420
#ifndef MSDOS
421
  sigunblock (sigmask (fatal_error_code));
422
#endif
423 424 425

  if (fatal_error_signal_hook)
    fatal_error_signal_hook ();
Pavel Janík's avatar
Pavel Janík committed
426

Jim Blandy's avatar
Jim Blandy committed
427 428 429
  kill (getpid (), fatal_error_code);
#endif /* not VMS */
}
430 431 432

#ifdef SIGDANGER

Richard M. Stallman's avatar
Richard M. Stallman committed
433
/* Handler for SIGDANGER.  */
434 435 436 437 438
SIGTYPE
memory_warning_signal (sig)
     int sig;
{
  signal (sig, memory_warning_signal);
439
  SIGNAL_THREAD_CHECK (sig);
440 441

  malloc_warning ("Operating system warns that virtual memory is running low.\n");
442 443 444

  /* It might be unsafe to call do_auto_save now.  */
  force_auto_save_soon ();
445 446
}
#endif
Richard M. Stallman's avatar
Richard M. Stallman committed
447 448

/* We define abort, rather than using it from the library,
Karl Heuer's avatar
Karl Heuer committed
449
   so that GDB can return from a breakpoint here.
Pavel Janík's avatar
Pavel Janík committed
450
   MSDOS has its own definition in msdos.c.  */
Richard M. Stallman's avatar
Richard M. Stallman committed
451

452
#if ! defined (DOS_NT) && ! defined (NO_ABORT)
453 454 455 456 457 458

#ifndef ABORT_RETURN_TYPE
#define ABORT_RETURN_TYPE void
#endif

ABORT_RETURN_TYPE
Richard M. Stallman's avatar
Richard M. Stallman committed
459 460 461
abort ()
{
  kill (getpid (), SIGABRT);
462 463
  /* This shouldn't be executed, but it prevents a warning.  */
  exit (1);
Richard M. Stallman's avatar
Richard M. Stallman committed
464
}
Karl Heuer's avatar
Karl Heuer committed
465
#endif
Richard M. Stallman's avatar
Richard M. Stallman committed
466

Jim Blandy's avatar
Jim Blandy committed
467

Pavel Janík's avatar
Pavel Janík committed
468
/* Code for dealing with Lisp access to the Unix command line.  */
Jim Blandy's avatar
Jim Blandy committed
469

Andreas Schwab's avatar
Andreas Schwab committed
470
static void
Jim Blandy's avatar
Jim Blandy committed
471 472 473 474 475 476
init_cmdargs (argc, argv, skip_args)
     int argc;
     char **argv;
     int skip_args;
{
  register int i;
477
  Lisp_Object name, dir, tem;
Juanma Barranquero's avatar
Juanma Barranquero committed
478
  int count = SPECPDL_INDEX ();
479
  Lisp_Object raw_name;
Jim Blandy's avatar
Jim Blandy committed
480

481 482 483
  initial_argv = argv;
  initial_argc = argc;

484 485 486 487 488 489 490 491 492 493 494
  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);

495 496 497 498 499 500
  /* 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,
501
		       Vexec_suffixes, &found, make_number (X_OK));
502
      if (yes == 1)
503 504 505 506 507 508 509 510
	{
	  /* 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);
	}
511
    }
512

513 514
  if (!NILP (Vinvocation_directory)
      && NILP (Ffile_name_absolute_p (Vinvocation_directory)))
515 516
    /* Emacs was started with relative path, like ./emacs.
       Make it absolute.  */
517 518
    Vinvocation_directory = Fexpand_file_name (Vinvocation_directory, Qnil);

519 520 521 522 523 524 525 526
  Vinstallation_directory = Qnil;

  if (!NILP (Vinvocation_directory))
    {
      dir = Vinvocation_directory;
      name = Fexpand_file_name (Vinvocation_name, dir);
      while (1)
	{
527
	  Lisp_Object tem, lib_src_exists;
528 529
	  Lisp_Object etc_exists, info_exists;

530 531 532 533 534
	  /* 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);
535

536
#ifdef MSDOS
537 538 539 540 541
	  /* 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);
542 543 544
#else
	  info_exists = Qnil;
#endif
545 546

	  if (!NILP (lib_src_exists) || !NILP (info_exists))
547
	    {
548 549 550
	      tem = Fexpand_file_name (build_string ("etc"), dir);
	      etc_exists = Ffile_exists_p (tem);
	      if (!NILP (etc_exists))
551
		{
552 553 554
		  Vinstallation_directory
		    = Ffile_name_as_directory (dir);
		  break;
555 556 557 558
		}
	    }

	  /* See if dir's parent contains those subdirs.  */
559 560
	  tem = Fexpand_file_name (build_string ("../lib-src"), dir);
	  lib_src_exists = Ffile_exists_p (tem);
561

562 563 564

#ifdef MSDOS
	  /* See the MSDOS commentary above.  */
565 566
	  tem = Fexpand_file_name (build_string ("../info"), dir);
	  info_exists = Ffile_exists_p (tem);
567 568 569
#else
	  info_exists = Qnil;
#endif
570 571

	  if (!NILP (lib_src_exists) || !NILP (info_exists))
572
	    {
573 574 575
	      tem = Fexpand_file_name (build_string ("../etc"), dir);
	      etc_exists = Ffile_exists_p (tem);
	      if (!NILP (etc_exists))
576
		{
577 578 579 580
		  tem = Fexpand_file_name (build_string (".."), dir);
		  Vinstallation_directory
		    = Ffile_name_as_directory (tem);
		  break;
581 582 583 584 585 586 587 588
		}
	    }

	  /* 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))
	    {
589
	      name = Fexpand_file_name (tem, dir);
590 591 592 593 594 595 596
	      dir = Ffile_name_directory (name);
	    }
	  else
	    break;
	}
    }

Jim Blandy's avatar
Jim Blandy committed
597 598 599 600 601
  Vcommand_line_args = Qnil;

  for (i = argc - 1; i >= 0; i--)
    {
      if (i == 0 || i > skip_args)
602 603 604
	/* For the moment, we keep arguments as is in unibyte strings.
	   They are decoded in the function command-line after we know
	   locale-coding-system.  */
Jim Blandy's avatar
Jim Blandy committed
605
	Vcommand_line_args
606
	  = Fcons (make_unibyte_string (argv[i], strlen (argv[i])),
607
		   Vcommand_line_args);
Jim Blandy's avatar
Jim Blandy committed
608
    }
609 610

  unbind_to (count, Qnil);
Jim Blandy's avatar
Jim Blandy committed
611
}
612 613

DEFUN ("invocation-name", Finvocation_name, Sinvocation_name, 0, 0, 0,
Pavel Janík's avatar
Pavel Janík committed
614 615 616
       doc: /* Return the program name that was used to run Emacs.
Any directory names are omitted.  */)
     ()
617 618 619 620
{
  return Fcopy_sequence (Vinvocation_name);
}

621
DEFUN ("invocation-directory", Finvocation_directory, Sinvocation_directory,
Pavel Janík's avatar
Pavel Janík committed
622 623 624
       0, 0, 0,
       doc: /* Return the directory name in which the Emacs executable was located.  */)
     ()
625 626 627 628
{
  return Fcopy_sequence (Vinvocation_directory);
}

Jim Blandy's avatar
Jim Blandy committed
629 630 631

#ifdef VMS
#ifdef LINK_CRTL_SHARE
632
#ifdef SHARABLE_LIB_BUG
Jim Blandy's avatar
Jim Blandy committed
633
extern noshare char **environ;
634
#endif /* SHARABLE_LIB_BUG */
Jim Blandy's avatar
Jim Blandy committed
635 636 637
#endif /* LINK_CRTL_SHARE */
#endif /* VMS */

638 639 640 641 642 643
#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

644
#ifndef ORDINARY_LINK
645 646 647 648 649
/* 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__
650
#ifndef GCC_CTORS_IN_LIBC
Andreas Schwab's avatar
Andreas Schwab committed
651
void __do_global_ctors ()
652
{}
Andreas Schwab's avatar
Andreas Schwab committed
653
void __do_global_ctors_aux ()
654
{}
Andreas Schwab's avatar
Andreas Schwab committed
655
void __do_global_dtors ()
656
{}
Richard M. Stallman's avatar
Richard M. Stallman committed
657
/* GNU/Linux has a bug in its library; avoid an error.  */
658
#ifndef GNU_LINUX
659
char * __CTOR_LIST__[2] = { (char *) (-1), 0 };
660
#endif
661
char * __DTOR_LIST__[2] = { (char *) (-1), 0 };
662
#endif /* GCC_CTORS_IN_LIBC */
Andreas Schwab's avatar
Andreas Schwab committed
663
void __main ()
664 665
{}
#endif /* __GNUC__ */
666
#endif /* ORDINARY_LINK */
667

Karl Heuer's avatar
Karl Heuer committed
668 669 670 671 672 673 674 675 676
/* 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.  */
677

Karl Heuer's avatar
Karl Heuer committed
678
static int
679
argmatch (argv, argc, sstr, lstr, minlen, valptr, skipptr)
Karl Heuer's avatar
Karl Heuer committed
680
     char **argv;
681
     int argc;
Karl Heuer's avatar
Karl Heuer committed
682 683 684 685 686 687
     char *sstr;
     char *lstr;
     int minlen;
     char **valptr;
     int *skipptr;
{
688
  char *p = NULL;
Karl Heuer's avatar
Karl Heuer committed
689
  int arglen;
690 691 692 693 694 695 696
  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
697 698 699 700 701 702 703 704 705 706 707 708 709 710 711
  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));
712
  if (lstr == 0 || arglen < minlen || strncmp (arg, lstr, arglen) != 0)
Karl Heuer's avatar
Karl Heuer committed
713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736
    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;
    }
}

737
#ifdef DOUG_LEA_MALLOC
Jim Blandy's avatar
Jim Blandy committed
738

739 740 741 742 743 744 745
/* malloc can be invoked even before main (e.g. by the dynamic
   linker), so the dumped malloc state must be restored as early as
   possible using this special hook.  */

static void
malloc_initialize_hook ()
{
746
#ifndef USE_CRT_DLL
747
  extern char **environ;
748
#endif
749

750 751
  if (initialized)
    {
752 753 754
      if (!malloc_using_checking)
	/* Work around a bug in glibc's malloc.  MALLOC_CHECK_ must be
	   ignored if the heap to be restored was constructed without
755 756 757 758
	   malloc checking.  Can't use unsetenv, since that calls malloc.  */
	{
	  char **p;

759
	  for (p = environ; p && *p; p++)
760 761 762 763 764 765 766 767
	    if (strncmp (*p, "MALLOC_CHECK_=", 14) == 0)
	      {
		do
		  *p = p[1];
		while (*++p);
		break;
	      }
	}
768

769
      malloc_set_state (malloc_state_ptr);
770
#ifndef XMALLOC_OVERRUN_CHECK
771
      free (malloc_state_ptr);
772
#endif
773
    }
774
  else
775 776 777 778 779
    {
      if (my_heap_start == 0)
        my_heap_start = sbrk (0);
      malloc_using_checking = getenv ("MALLOC_CHECK_") != NULL;
    }
780 781 782 783 784 785
}

void (*__malloc_initialize_hook) () = malloc_initialize_hook;

#endif /* DOUG_LEA_MALLOC */

786 787 788 789 790 791 792

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

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

793 794
char *
bug_reporting_address ()
795
{
796
  int count = 0;
797 798 799 800 801 802 803 804 805
  Lisp_Object temp;
  char *string;

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

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

806
  string = SDATA (temp);
807

808 809 810 811 812 813 814
  /* Count dots in `emacs-version'.  */
  while (*string)
    {
      if (*string == '.')
	count++;
      string++;
    }
815 816 817

  /* When `emacs-version' has at least three dots, it is development or
     pretest version of Emacs.  */
818
  return count >= 3 ? REPORT_EMACS_BUG_PRETEST_ADDRESS : REPORT_EMACS_BUG_ADDRESS;
819 820 821
}


822 823
/* ARGSUSED */
int
Dave Love's avatar
Dave Love committed
824 825 826 827 828
main (argc, argv
#ifdef VMS
, envp
#endif
)
829 830
     int argc;
     char **argv;
Dave Love's avatar
Dave Love committed
831
#ifdef VMS
832
     char **envp;
Dave Love's avatar
Dave Love committed
833
#endif
834
{
835
#if GC_MARK_STACK
836 837
  Lisp_Object dummy;
#endif
838
  char stack_bottom_variable;
839
  int do_initial_setlocale;
840
  int skip_args = 0;
841
#ifndef USE_CRT_DLL
842
  extern int errno;
843
#endif
844 845 846 847
#ifdef HAVE_SETRLIMIT
  struct rlimit rlim;
#endif
  int no_loadup = 0;
Richard M. Stallman's avatar
Richard M. Stallman committed
848
  char *junk = 0;
849

850
#if GC_MARK_STACK
851 852 853 854
  extern Lisp_Object *stack_base;
  stack_base = &dummy;
#endif

855 856 857 858 859 860 861 862 863 864 865
  if (!initialized)
    {
      extern char my_endbss[];
      extern char *my_endbss_static;

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

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

866 867
#ifdef LINUX_SBRK_BUG
  __sbrk (1);
868 869
#endif

870 871 872 873 874
#ifdef RUN_TIME_REMAP
  if (initialized)
    run_time_remap (argv[0]);
#endif

875
#ifdef MAC_OSX
876 877 878 879
  if (!initialized)
    unexec_init_emacs_zone ();
#endif

880
  sort_args (argc, argv);
881 882
  argc = 0;
  while (argv[argc]) argc++;
883

884 885 886 887
  if (argmatch (argv, argc, "-version", "--version", 3, NULL, &skip_args)
      /* We don't know the version number unless this is a dumped Emacs.
         So ignore --version otherwise.  */
      && initialized)
888 889 890 891 892 893 894 895 896 897
    {
      Lisp_Object tem;
      tem = Fsymbol_value (intern ("emacs-version"));
      if (!STRINGP (tem))
	{
	  fprintf (stderr, "Invalid value of `emacs-version'\n");
	  exit (1);
	}
      else
	{
898
	  printf ("GNU Emacs %s\n", SDATA (tem));
899
	  printf ("Copyright (C) 2005 Free Software Foundation, Inc.\n");
900 901 902 903
	  printf ("GNU Emacs comes with ABSOLUTELY NO WARRANTY.\n");
	  printf ("You may redistribute copies of Emacs\n");
	  printf ("under the terms of the GNU General Public License.\n");
	  printf ("For more information about these matters, ");
Karl Heuer's avatar
Karl Heuer committed
904
	  printf ("see the file named COPYING.\n");
905 906 907 908
	  exit (0);
	}
    }

909 910 911 912 913 914 915 916 917 918 919 920
#ifdef HAVE_PERSONALITY_LINUX32
  /* See if there is a gap between the end of BSS and the heap.
     In that case, set personality and exec ourself again.  */
  if (!initialized
      && (strcmp (argv[argc-1], "dump") == 0
          || strcmp (argv[argc-1], "bootstrap") == 0)
      && heap_bss_diff > MAX_HEAP_BSS_DIFF)
    {
      if (! getenv ("EMACS_HEAP_EXEC"))
        {
          /* Set this so we only do this once.  */
          putenv("EMACS_HEAP_EXEC=true");
921 922 923 924 925 926 927

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

928 929 930 931 932 933 934 935 936
          execvp (argv[0], argv);

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


Jim Blandy's avatar
Jim Blandy committed
937 938
/* Map in shared memory, if we are using that.  */
#ifdef HAVE_SHM
939
  if (argmatch (argv, argc, "-nl", "--no-shared-memory", 6, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
940 941 942 943 944 945 946 947 948 949 950 951 952
    {
      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

953
#ifdef NeXT
954 955 956 957 958 959 960
  {
    extern int malloc_cookie;
    /* This helps out unexnext.c.  */
    if (initialized)
      if (malloc_jumpstart (malloc_cookie) != 0)
	printf ("malloc jumpstart failed!\n");
  }
961 962
#endif /* NeXT */

963 964
#ifdef MAC_OSX
  /* Skip process serial number passed in the form -psn_x_y as
965 966 967 968
     command-line argument.  The WindowServer adds this option when
     Emacs is invoked from the Finder or by the `open' command.  In
     these cases, the working directory becomes `/', so we change it
     to the user's home directory.  */
969
  if (argc > skip_args + 1 && strncmp (argv[skip_args+1], "-psn_", 5) == 0)
970 971 972 973
    {
      chdir (getenv ("HOME"));
      skip_args++;
    }
974 975
#endif /* MAC_OSX */

Jim Blandy's avatar
Jim Blandy committed
976
#ifdef VMS
Pavel Janík's avatar
Pavel Janík committed
977
  /* If -map specified, map the data file in.  */
Karl Heuer's avatar
Karl Heuer committed
978 979
  {
    char *file;
Thien-Thi Nguyen's avatar
Thien-Thi Nguyen committed
980
    if (argmatch (argv, argc, "-map", "--map-data", 3, &file, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
981 982
      mapin_data (file);
  }
Jim Blandy's avatar
Jim Blandy committed
983 984

#ifdef LINK_CRTL_SHARE
985
#ifdef SHARABLE_LIB_BUG
Pavel Janík's avatar
Pavel Janík committed
986
  /* Bletcherous shared libraries!  */
Jim Blandy's avatar
Jim Blandy committed
987 988 989 990 991 992 993 994
  if (!stdin)
    stdin = fdopen (0, "r");
  if (!stdout)
    stdout = fdopen (1, "w");
  if (!stderr)
    stderr = fdopen (2, "w");
  if (!environ)
    environ = envp;
995
#endif /* SHARABLE_LIB_BUG */
Jim Blandy's avatar
Jim Blandy committed
996 997 998
#endif /* LINK_CRTL_SHARE */
#endif /* VMS */

999
#if defined (HAVE_SETRLIMIT) && defined (RLIMIT_STACK)
1000 1001 1002 1003 1004 1005 1006 1007
  /* Extend the stack space available.
     Don't do that if dumping, since some systems (e.g. DJGPP)
     might define a smaller stack limit at that time.  */
  if (1
#ifndef CANNOT_DUMP
      && (!noninteractive || initialized)
#endif
      && !getrlimit (RLIMIT_STACK, &rlim))
1008
    {
1009
      long newlim;
1010
      extern size_t re_max_failures;
1011 1012 1013 1014 1015 1016 1017 1018
      /* Approximate the amount regex.c needs per unit of re_max_failures.  */
      int ratio = 20 * sizeof (char *);
      /* Then add 33% to cover the size of the smaller stacks that regex.c
	 successively allocates and discards, on its way to the maximum.  */
      ratio += ratio / 3;
      /* Add in some extra to cover
	 what we're likely to use for other reasons.  */
      newlim = re_max_failures * ratio + 200000;
1019 1020 1021 1022 1023 1024 1025
#ifdef __NetBSD__
      /* NetBSD (at least NetBSD 1.2G and former) has a bug in its
       stack allocation routine for new process that the allocation
       fails if stack limit is not on page boundary.  So, round up the
       new limit to page boundary.  */
      newlim = (newlim + getpagesize () - 1) / getpagesize () * getpagesize();
#endif
1026
      if (newlim > rlim.rlim_max)
1027 1028
	{
	  newlim = rlim.rlim_max;
1029 1030
	  /* Don't let regex.c overflow the stack we have.  */
	  re_max_failures = (newlim - 200000) / ratio;
1031
	}
1032 1033 1034
      if (rlim.rlim_cur < newlim)
	rlim.rlim_cur = newlim;

1035 1036
      setrlimit (RLIMIT_STACK, &rlim);
    }
1037
#endif /* HAVE_SETRLIMIT and RLIMIT_STACK */
1038

Jim Blandy's avatar
Jim Blandy committed
1039 1040 1041 1042 1043
  /* Record (approximately) where the stack begins.  */
  stack_bottom = &stack_bottom_variable;

#ifdef USG_SHARED_LIBRARIES
  if (bss_end)
1044
    brk ((void *)bss_end);
Jim Blandy's avatar
Jim Blandy committed
1045 1046 1047
#endif

  clearerr (stdin);
1048

Jim Blandy's avatar
Jim Blandy committed
1049
#ifndef SYSTEM_MALLOC
1050 1051
  /* Arrange to get warning messages as memory fills up.  */
  memory_warnings (0, malloc_warning);
1052

1053 1054 1055
  /* Call malloc at least once, to run the initial __malloc_hook.
     Also call realloc and free for consistency.  */
  free (realloc (malloc (4), 4));
1056

1057
# ifndef SYNC_INPUT
1058 1059
  /* Arrange to disable interrupt input inside malloc etc.  */
  uninterrupt_malloc ();
1060
# endif /* not SYNC_INPUT */
Jim Blandy's avatar
Jim Blandy committed
1061 1062
#endif	/* not SYSTEM_MALLOC */

1063 1064 1065 1066
#ifdef HAVE_GTK_AND_PTHREAD
  main_thread = pthread_self ();
#endif /* HAVE_GTK_AND_PTHREAD */

1067
#if defined (MSDOS) || defined (WINDOWSNT)
1068 1069 1070
  /* We do all file input/output as binary files.  When we need to translate
     newlines, we do that manually.  */
  _fmode = O_BINARY;
1071
#endif /* MSDOS || WINDOWSNT */
1072

1073
#ifdef MSDOS
1074 1075 1076 1077 1078 1079 1080 1081 1082
#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 */
1083 1084 1085
  (stdin)->_flag &= ~_IOTEXT;
  (stdout)->_flag &= ~_IOTEXT;
  (stderr)->_flag &= ~_IOTEXT;
1086
#endif /* not __DJGPP__ >= 2 */
1087 1088
#endif /* MSDOS */

1089
#ifdef SET_EMACS_PRIORITY
1090
  if (emacs_priority)
1091
    nice (emacs_priority);
Jim Blandy's avatar
Jim Blandy committed
1092
  setuid (getuid ());
1093
#endif /* SET_EMACS_PRIORITY */
Jim Blandy's avatar
Jim Blandy committed
1094

1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108
  /* Skip initial setlocale if LC_ALL is "C", as it's not needed in that case.
     The build procedure uses this while dumping, to ensure that the
     dumped Emacs does not have its system locale tables initialized,
     as that might cause screwups when the dumped Emacs starts up.  */
  {
    char *lc_all = getenv ("LC_ALL");
    do_initial_setlocale = ! lc_all || strcmp (lc_all, "C");
  }

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

1109
#ifdef EXTRA_INITIALIZE
1110
  EXTRA_INITIALIZE;
1111 1112
#endif

Jim Blandy's avatar
Jim Blandy committed
1113 1114
  inhibit_window_system = 0;

Pavel Janík's avatar
Pavel Janík committed
1115
  /* Handle the -t switch, which specifies filename to use as terminal.  */
1116 1117 1118 1119 1120 1121
  while (1)
    {
      char *term;
      if (argmatch (argv, argc, "-t", "--terminal", 4, &term, &skip_args))
	{
	  int result;
1122 1123 1124
	  emacs_close (0);
	  emacs_close (1);
	  result = emacs_open (term, O_RDWR, 0);
1125 1126 1127
	  if (result < 0)
	    {
	      char *errstring = strerror (errno);
1128
	      fprintf (stderr, "%s: %s: %s\n", argv[0], term, errstring);
1129 1130 1131 1132 1133
	      exit (1);
	    }
	  dup (0);
	  if (! isatty (0))
	    {
1134
	      fprintf (stderr, "%s: %s: not a tty\n", argv[0], term);
1135 1136 1137
	      exit (1);
	    }
	  fprintf (stderr, "Using %s\n", term);
1138
#ifdef HAVE_WINDOW_SYSTEM
1139
	  inhibit_window_system = 1; /* -t => -nw */
Jim Blandy's avatar
Jim Blandy committed
1140
#endif
1141 1142 1143 1144 1145
	}
      else
	break;
    }

1146 1147 1148 1149
  /* Command line option --no-windows is deprecated and thus not mentioned
     in the manual and usage informations.  */
  if (argmatch (argv, argc, "-nw", "--no-window-system", 6, NULL, &skip_args)
      || argmatch (argv, argc, "-nw", "--no-windows", 6, NULL, &skip_args))
Karl Heuer's avatar
Karl Heuer committed
1150
    inhibit_window_system = 1;
Jim Blandy's avatar
Jim Blandy committed
1151

Karl Heuer's avatar
Karl Heuer committed
1152
  /* Handle the -batch switch, which means don't do interactive display.  */
Jim Blandy's avatar
Jim Blandy committed
1153
  noninteractive = 0;
1154
  if (argmatch (argv, argc, "-batch", "--batch", 5, NULL, &skip_args))
1155 1156 1157 1158
    {
      noninteractive = 1;
      Vundo_outer_limit = Qnil;
    }
Richard M. Stallman's avatar
Richard M. Stallman committed
1159 1160 1161
  if (argmatch (argv, argc, "-script", "--script", 3, &junk, &skip_args))
    {
      noninteractive = 1;	/* Set batch mode.  */
1162 1163 1164
      /* Convert --script to --scriptload, un-skip it, and sort again
	 so that it will be handled in proper sequence.  */
      argv[skip_args - 1] = "-scriptload";
Richard M. Stallman's avatar
Richard M. Stallman committed
1165 1166 1167
      skip_args -= 2;
      sort_args (argc, argv);
    }
Karl Heuer's avatar
Karl Heuer committed
1168

Pavel Janík's avatar
Pavel Janík committed
1169
  /* Handle the --help option, which gives a usage message.  */
1170
  if (argmatch (argv, argc, "-help", "--help", 3, NULL, &skip_args))
Jim Blandy's avatar
Jim Blandy committed
1171
    {
1172 1173 1174
      printf (USAGE1, argv[0], USAGE2);
      printf (USAGE3);
      printf (USAGE4, bug_reporting_address ());
Karl Heuer's avatar
Karl Heuer committed
1175
      exit (0);
Jim Blandy's avatar
Jim Blandy committed
1176 1177
    }

1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192
  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
1193 1194
  init_signals ();

1195 1196 1197 1198 1199 1200 1201
  /* Don't catch SIGHUP if dumping.  */
  if (1
#ifndef CANNOT_DUMP
      && initialized
#endif
      )
    {
1202
      sigblock (sigmask (SIGHUP));
1203 1204 1205 1206 1207
      /* 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);
1208
      sigunblock (sigmask (SIGHUP));
1209 1210
    }

Jim Blandy's avatar
Jim Blandy committed
1211 1212