1 /* Fully extensible Emacs, running on Unix, intended for GNU.
3 Copyright (C) 1985-1987, 1993-1995, 1997-1999, 2001-2011
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
27 #include <sys/types.h>
36 #include <windows.h> /* just for w32.h */
38 #include "w32heap.h" /* for prototype of sbrk */
41 #ifdef NS_IMPL_GNUSTEP
42 /* At least under Debian, GSConfig is in a subdirectory. --Stef */
43 #include <GNUstepBase/GSConfig.h>
47 #include "intervals.h"
52 #include "blockinput.h"
53 #include "syssignal.h"
56 #include "termhooks.h"
78 #include <sys/resource.h>
81 #ifdef HAVE_PERSONALITY_LINUX32
82 #include <sys/personality.h>
92 #define setpgrp setpgid
96 static const char emacs_version
[] = VERSION
;
97 static const char emacs_copyright
[] = "Copyright (C) 2011 Free Software Foundation, Inc.";
99 /* Make these values available in GDB, which doesn't see macros. */
102 int gdb_use_lsb EXTERNALLY_VISIBLE
= 1;
104 int gdb_use_lsb EXTERNALLY_VISIBLE
= 0;
106 #ifndef USE_LISP_UNION_TYPE
107 int gdb_use_union EXTERNALLY_VISIBLE
= 0;
109 int gdb_use_union EXTERNALLY_VISIBLE
= 1;
111 EMACS_INT gdb_valbits EXTERNALLY_VISIBLE
= VALBITS
;
112 EMACS_INT gdb_gctypebits EXTERNALLY_VISIBLE
= GCTYPEBITS
;
113 #if defined (DATA_SEG_BITS) && ! defined (USE_LSB_TAG)
114 EMACS_INT gdb_data_seg_bits EXTERNALLY_VISIBLE
= DATA_SEG_BITS
;
116 EMACS_INT gdb_data_seg_bits EXTERNALLY_VISIBLE
= 0;
118 EMACS_INT PVEC_FLAG EXTERNALLY_VISIBLE
= PSEUDOVECTOR_FLAG
;
119 EMACS_INT gdb_array_mark_flag EXTERNALLY_VISIBLE
= ARRAY_MARK_FLAG
;
120 /* GDB might say "No enum type named pvec_type" if we don't have at
121 least one symbol with that type, and then xbacktrace could fail. */
122 enum pvec_type gdb_pvec_type EXTERNALLY_VISIBLE
= PVEC_TYPE_MASK
;
124 /* Empty lisp strings. To avoid having to build any others. */
125 Lisp_Object empty_unibyte_string
, empty_multibyte_string
;
127 /* Set nonzero after Emacs has started up the first time.
128 Prevents reinitialization of the Lisp world and keymaps
129 on subsequent starts. */
132 #ifdef DOUG_LEA_MALLOC
133 /* Preserves a pointer to the memory allocated that copies that
134 static data inside glibc's malloc. */
135 static void *malloc_state_ptr
;
136 /* From glibc, a routine that returns a copy of the malloc internal state. */
137 extern void *malloc_get_state (void);
138 /* From glibc, a routine that overwrites the malloc internal state. */
139 extern int malloc_set_state (void*);
140 /* Non-zero if the MALLOC_CHECK_ environment variable was set while
141 dumping. Used to work around a bug in glibc's malloc. */
142 static int malloc_using_checking
;
145 Lisp_Object Qfile_name_handler_alist
;
147 Lisp_Object Qrisky_local_variable
;
149 /* If non-zero, Emacs should not attempt to use a window-specific code,
150 but instead should use the virtual terminal under which it was started. */
151 int inhibit_window_system
;
153 /* If non-zero, a filter or a sentinel is running. Tested to save the match
154 data on the first attempt to change it inside asynchronous code. */
155 int running_asynch_code
;
157 #if defined(HAVE_X_WINDOWS) || defined(HAVE_NS)
158 /* If non-zero, -d was specified, meaning we're using some window system. */
162 /* An address near the bottom of the stack.
163 Tells GC how to save a copy of the stack. */
166 /* The address where the heap starts (from the first sbrk (0) call). */
167 static void *my_heap_start
;
169 /* The gap between BSS end and heap start as far as we can tell. */
170 static unsigned long heap_bss_diff
;
172 /* Nonzero means running Emacs without interactive terminal. */
175 /* Nonzero means remove site-lisp directories from load-path. */
178 /* Name for the server started by the daemon.*/
179 static char *daemon_name
;
181 /* Pipe used to send exit notification to the daemon parent at
185 /* Save argv and argc. */
189 static void sort_args (int argc
, char **argv
);
190 static void syms_of_emacs (void);
192 /* MSVC needs each string be shorter than 2048 bytes, so the usage
193 strings below are split to not overflow this limit. */
195 Usage: %s [OPTION-OR-FILENAME]...\n\
197 Run Emacs, the extensible, customizable, self-documenting real-time\n\
198 display editor. The recommended way to start Emacs for normal editing\n\
199 is with no options at all.\n\
201 Run M-x info RET m emacs RET m emacs invocation RET inside Emacs to\n\
202 read the main documentation for these command-line arguments.\n\
204 Initialization options:\n\
206 --batch do not do interactive display; implies -q\n\
207 --chdir DIR change to directory DIR\n\
208 --daemon start a server in the background\n\
209 --debug-init enable Emacs Lisp debugger for init file\n\
210 --display, -d DISPLAY use X server DISPLAY\n\
211 --no-desktop do not load a saved desktop\n\
212 --no-init-file, -q load neither ~/.emacs nor default.el\n\
213 --no-shared-memory, -nl do not use shared memory\n\
214 --no-site-file do not load site-start.el\n\
215 --no-site-lisp, -nsl do not add site-lisp directories to load-path\n\
216 --no-splash do not display a splash screen on startup\n\
217 --no-window-system, -nw do not communicate with X, ignoring $DISPLAY\n\
218 --quick, -Q equivalent to:\n\
219 -q --no-site-file --no-site-lisp --no-splash\n\
220 --script FILE run FILE as an Emacs Lisp script\n\
221 --terminal, -t DEVICE use DEVICE for terminal I/O\n\
222 --user, -u USER load ~USER/.emacs instead of your own\n\
228 FILE visit FILE using find-file\n\
229 +LINE go to line LINE in next FILE\n\
230 +LINE:COLUMN go to line LINE, column COLUMN, in next FILE\n\
231 --directory, -L DIR add DIR to variable load-path\n\
232 --eval EXPR evaluate Emacs Lisp expression EXPR\n\
233 --execute EXPR evaluate Emacs Lisp expression EXPR\n\
234 --file FILE visit FILE using find-file\n\
235 --find-file FILE visit FILE using find-file\n\
236 --funcall, -f FUNC call Emacs Lisp function FUNC with no arguments\n\
237 --insert FILE insert contents of FILE into current buffer\n\
238 --kill exit without asking for confirmation\n\
239 --load, -l FILE load Emacs Lisp FILE using the load function\n\
240 --visit FILE visit FILE using find-file\n\
246 --background-color, -bg COLOR window background color\n\
247 --basic-display, -D disable many display features;\n\
248 used for debugging Emacs\n\
249 --border-color, -bd COLOR main border color\n\
250 --border-width, -bw WIDTH width of main border\n\
251 --color, --color=MODE override color mode for character terminals;\n\
252 MODE defaults to `auto', and\n\
253 can also be `never', `always',\n\
254 or a mode name like `ansi8'\n\
255 --cursor-color, -cr COLOR color of the Emacs cursor indicating point\n\
256 --font, -fn FONT default font; must be fixed-width\n\
257 --foreground-color, -fg COLOR window foreground color\n\
258 --fullheight, -fh make the first frame high as the screen\n\
259 --fullscreen, -fs make the first frame fullscreen\n\
260 --fullwidth, -fw make the first frame wide as the screen\n\
261 --maximized, -mm make the first frame maximized\n\
262 --geometry, -g GEOMETRY window geometry\n\
263 --no-bitmap-icon, -nbi do not use picture of gnu for Emacs icon\n\
264 --iconic start Emacs in iconified state\n\
265 --internal-border, -ib WIDTH width between text and main border\n\
266 --line-spacing, -lsp PIXELS additional space to put between lines\n\
267 --mouse-color, -ms COLOR mouse cursor color in Emacs window\n\
268 --name NAME title for initial Emacs frame\n\
269 --no-blinking-cursor, -nbc disable blinking cursor\n\
270 --reverse-video, -r, -rv switch foreground and background\n\
271 --title, -T TITLE title for initial Emacs frame\n\
272 --vertical-scroll-bars, -vb enable vertical scroll bars\n\
273 --xrm XRESOURCES set additional X resources\n\
274 --parent-id XID set parent window\n\
275 --help display this help and exit\n\
276 --version output version information and exit\n\
280 You can generally also specify long option names with a single -; for\n\
281 example, -batch as well as --batch. You can use any unambiguous\n\
282 abbreviation for a --option.\n\
284 Various environment variables and window system resources also affect\n\
285 Emacs' operation. See the main documentation.\n\
287 Report bugs to bug-gnu-emacs@gnu.org. First, please see the Bugs\n\
288 section of the Emacs manual or the file BUGS.\n"
291 /* Signal code for the fatal signal that was received. */
292 static int fatal_error_code
;
294 /* Nonzero if handling a fatal error already. */
295 int fatal_error_in_progress
;
297 /* If non-null, call this function from fatal_error_signal before
298 committing suicide. */
300 static void (*fatal_error_signal_hook
) (void);
302 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
303 /* When compiled with GTK and running under Gnome,
304 multiple threads may be created. Keep track of our main
305 thread to make sure signals are delivered to it (see syssignal.h). */
307 pthread_t main_thread
;
311 /* Handle bus errors, invalid instruction, etc. */
312 #ifndef FLOAT_CATCH_SIGILL
316 fatal_error_signal (int sig
)
318 SIGNAL_THREAD_CHECK (sig
);
319 fatal_error_code
= sig
;
320 signal (sig
, SIG_DFL
);
322 TOTALLY_UNBLOCK_INPUT
;
324 /* If fatal error occurs in code below, avoid infinite recursion. */
325 if (! fatal_error_in_progress
)
327 fatal_error_in_progress
= 1;
329 if (sig
== SIGTERM
|| sig
== SIGHUP
|| sig
== SIGINT
)
330 Fkill_emacs (make_number (sig
));
332 shut_down_emacs (sig
, 0, Qnil
);
335 /* Signal the same code; this time it will really be fatal.
336 Remember that since we're in a signal handler, the signal we're
337 going to send is probably blocked, so we have to unblock it if we
338 want to really receive it. */
340 sigunblock (sigmask (fatal_error_code
));
343 if (fatal_error_signal_hook
)
344 fatal_error_signal_hook ();
346 kill (getpid (), fatal_error_code
);
351 /* Handler for SIGDANGER. */
353 memory_warning_signal (sig
)
356 signal (sig
, memory_warning_signal
);
357 SIGNAL_THREAD_CHECK (sig
);
359 malloc_warning ("Operating system warns that virtual memory is running low.\n");
361 /* It might be unsafe to call do_auto_save now. */
362 force_auto_save_soon ();
366 /* We define abort, rather than using it from the library,
367 so that GDB can return from a breakpoint here.
368 MSDOS has its own definition in msdos.c. */
370 #if ! defined (DOS_NT) && ! defined (NO_ABORT)
375 kill (getpid (), SIGABRT
);
376 /* This shouldn't be executed, but it prevents a warning. */
382 /* Code for dealing with Lisp access to the Unix command line. */
385 init_cmdargs (int argc
, char **argv
, int skip_args
)
388 Lisp_Object name
, dir
, handler
;
389 int count
= SPECPDL_INDEX ();
390 Lisp_Object raw_name
;
395 raw_name
= build_string (argv
[0]);
397 /* Add /: to the front of the name
398 if it would otherwise be treated as magic. */
399 handler
= Ffind_file_name_handler (raw_name
, Qt
);
400 if (! NILP (handler
))
401 raw_name
= concat2 (build_string ("/:"), raw_name
);
403 Vinvocation_name
= Ffile_name_nondirectory (raw_name
);
404 Vinvocation_directory
= Ffile_name_directory (raw_name
);
406 /* If we got no directory in argv[0], search PATH to find where
407 Emacs actually came from. */
408 if (NILP (Vinvocation_directory
))
411 int yes
= openp (Vexec_path
, Vinvocation_name
,
412 Vexec_suffixes
, &found
, make_number (X_OK
));
415 /* Add /: to the front of the name
416 if it would otherwise be treated as magic. */
417 handler
= Ffind_file_name_handler (found
, Qt
);
418 if (! NILP (handler
))
419 found
= concat2 (build_string ("/:"), found
);
420 Vinvocation_directory
= Ffile_name_directory (found
);
424 if (!NILP (Vinvocation_directory
)
425 && NILP (Ffile_name_absolute_p (Vinvocation_directory
)))
426 /* Emacs was started with relative path, like ./emacs.
428 Vinvocation_directory
= Fexpand_file_name (Vinvocation_directory
, Qnil
);
430 Vinstallation_directory
= Qnil
;
432 if (!NILP (Vinvocation_directory
))
434 dir
= Vinvocation_directory
;
435 name
= Fexpand_file_name (Vinvocation_name
, dir
);
438 Lisp_Object tem
, lib_src_exists
;
439 Lisp_Object etc_exists
, info_exists
;
441 /* See if dir contains subdirs for use by Emacs.
442 Check for the ones that would exist in a build directory,
443 not including lisp and info. */
444 tem
= Fexpand_file_name (build_string ("lib-src"), dir
);
445 lib_src_exists
= Ffile_exists_p (tem
);
448 /* MSDOS installations frequently remove lib-src, but we still
449 must set installation-directory, or else info won't find
450 its files (it uses the value of installation-directory). */
451 tem
= Fexpand_file_name (build_string ("info"), dir
);
452 info_exists
= Ffile_exists_p (tem
);
457 if (!NILP (lib_src_exists
) || !NILP (info_exists
))
459 tem
= Fexpand_file_name (build_string ("etc"), dir
);
460 etc_exists
= Ffile_exists_p (tem
);
461 if (!NILP (etc_exists
))
463 Vinstallation_directory
464 = Ffile_name_as_directory (dir
);
469 /* See if dir's parent contains those subdirs. */
470 tem
= Fexpand_file_name (build_string ("../lib-src"), dir
);
471 lib_src_exists
= Ffile_exists_p (tem
);
475 /* See the MSDOS commentary above. */
476 tem
= Fexpand_file_name (build_string ("../info"), dir
);
477 info_exists
= Ffile_exists_p (tem
);
482 if (!NILP (lib_src_exists
) || !NILP (info_exists
))
484 tem
= Fexpand_file_name (build_string ("../etc"), dir
);
485 etc_exists
= Ffile_exists_p (tem
);
486 if (!NILP (etc_exists
))
488 tem
= Fexpand_file_name (build_string (".."), dir
);
489 Vinstallation_directory
490 = Ffile_name_as_directory (tem
);
495 /* If the Emacs executable is actually a link,
496 next try the dir that the link points into. */
497 tem
= Ffile_symlink_p (name
);
500 name
= Fexpand_file_name (tem
, dir
);
501 dir
= Ffile_name_directory (name
);
508 Vcommand_line_args
= Qnil
;
510 for (i
= argc
- 1; i
>= 0; i
--)
512 if (i
== 0 || i
> skip_args
)
513 /* For the moment, we keep arguments as is in unibyte strings.
514 They are decoded in the function command-line after we know
515 locale-coding-system. */
517 = Fcons (make_unibyte_string (argv
[i
], strlen (argv
[i
])),
521 unbind_to (count
, Qnil
);
524 DEFUN ("invocation-name", Finvocation_name
, Sinvocation_name
, 0, 0, 0,
525 doc
: /* Return the program name that was used to run Emacs.
526 Any directory names are omitted. */)
529 return Fcopy_sequence (Vinvocation_name
);
532 DEFUN ("invocation-directory", Finvocation_directory
, Sinvocation_directory
,
534 doc
: /* Return the directory name in which the Emacs executable was located. */)
537 return Fcopy_sequence (Vinvocation_directory
);
542 /* A valid but unlikely value for the TZ environment value.
543 It is OK (though a bit slower) if the user actually chooses this value. */
544 static char dump_tz
[] = "UtC0";
547 #ifndef ORDINARY_LINK
548 /* We don't include crtbegin.o and crtend.o in the link,
549 so these functions and variables might be missed.
550 Provide dummy definitions to avoid error.
551 (We don't have any real constructors or destructors.) */
554 /* Define a dummy function F. Declare F too, to pacify gcc
555 -Wmissing-prototypes. */
556 #define DEFINE_DUMMY_FUNCTION(f) \
557 void f (void) EXTERNALLY_VISIBLE; void f (void) {}
559 #ifndef GCC_CTORS_IN_LIBC
560 DEFINE_DUMMY_FUNCTION (__do_global_ctors
)
561 DEFINE_DUMMY_FUNCTION (__do_global_ctors_aux
)
562 DEFINE_DUMMY_FUNCTION (__do_global_dtors
)
563 /* GNU/Linux has a bug in its library; avoid an error. */
565 char * __CTOR_LIST__
[2] EXTERNALLY_VISIBLE
= { (char *) (-1), 0 };
567 char * __DTOR_LIST__
[2] EXTERNALLY_VISIBLE
= { (char *) (-1), 0 };
568 #endif /* GCC_CTORS_IN_LIBC */
569 DEFINE_DUMMY_FUNCTION (__main
)
570 #endif /* __GNUC__ */
571 #endif /* ORDINARY_LINK */
573 /* Test whether the next argument in ARGV matches SSTR or a prefix of
574 LSTR (at least MINLEN characters). If so, then if VALPTR is non-null
575 (the argument is supposed to have a value) store in *VALPTR either
576 the next argument or the portion of this one after the equal sign.
577 ARGV is read starting at position *SKIPPTR; this index is advanced
578 by the number of arguments used.
580 Too bad we can't just use getopt for all of this, but we don't have
581 enough information to do it right. */
584 argmatch (char **argv
, int argc
, const char *sstr
, const char *lstr
,
585 int minlen
, char **valptr
, int *skipptr
)
591 /* Don't access argv[argc]; give up in advance. */
592 if (argc
<= *skipptr
+ 1)
595 arg
= argv
[*skipptr
+1];
598 if (strcmp (arg
, sstr
) == 0)
602 *valptr
= argv
[*skipptr
+2];
609 arglen
= (valptr
!= NULL
&& (p
= strchr (arg
, '=')) != NULL
610 ? p
- arg
: strlen (arg
));
611 if (lstr
== 0 || arglen
< minlen
|| strncmp (arg
, lstr
, arglen
) != 0)
613 else if (valptr
== NULL
)
624 else if (argv
[*skipptr
+2] != NULL
)
626 *valptr
= argv
[*skipptr
+2];
636 #ifdef DOUG_LEA_MALLOC
638 /* malloc can be invoked even before main (e.g. by the dynamic
639 linker), so the dumped malloc state must be restored as early as
640 possible using this special hook. */
643 malloc_initialize_hook (void)
646 extern char **environ
;
651 if (!malloc_using_checking
)
652 /* Work around a bug in glibc's malloc. MALLOC_CHECK_ must be
653 ignored if the heap to be restored was constructed without
654 malloc checking. Can't use unsetenv, since that calls malloc. */
658 for (p
= environ
; p
&& *p
; p
++)
659 if (strncmp (*p
, "MALLOC_CHECK_=", 14) == 0)
668 malloc_set_state (malloc_state_ptr
);
669 #ifndef XMALLOC_OVERRUN_CHECK
670 free (malloc_state_ptr
);
675 if (my_heap_start
== 0)
676 my_heap_start
= sbrk (0);
677 malloc_using_checking
= getenv ("MALLOC_CHECK_") != NULL
;
681 void (*__malloc_initialize_hook
) (void) = malloc_initialize_hook
;
683 #endif /* DOUG_LEA_MALLOC */
688 main (int argc
, char **argv
)
693 char stack_bottom_variable
;
694 int do_initial_setlocale
;
696 #ifdef HAVE_SETRLIMIT
711 #if defined (USE_GTK) && defined (G_SLICE_ALWAYS_MALLOC)
712 /* This is used by the Cygwin build. */
713 setenv ("G_SLICE", "always-malloc", 1);
718 extern char my_endbss
[];
719 extern char *my_endbss_static
;
721 if (my_heap_start
== 0)
722 my_heap_start
= sbrk (0);
724 heap_bss_diff
= (char *)my_heap_start
- max (my_endbss
, my_endbss_static
);
727 #ifdef RUN_TIME_REMAP
729 run_time_remap (argv
[0]);
732 /* If using unexmacosx.c (set by s/darwin.h), we must do this. */
735 unexec_init_emacs_zone ();
738 sort_args (argc
, argv
);
740 while (argv
[argc
]) argc
++;
742 if (argmatch (argv
, argc
, "-version", "--version", 3, NULL
, &skip_args
))
744 const char *version
, *copyright
;
747 Lisp_Object tem
, tem2
;
748 tem
= Fsymbol_value (intern_c_string ("emacs-version"));
749 tem2
= Fsymbol_value (intern_c_string ("emacs-copyright"));
752 fprintf (stderr
, "Invalid value of `emacs-version'\n");
757 fprintf (stderr
, "Invalid value of `emacs-copyright'\n");
762 version
= SSDATA (tem
);
763 copyright
= SSDATA (tem2
);
768 version
= emacs_version
;
769 copyright
= emacs_copyright
;
771 printf ("GNU Emacs %s\n", version
);
772 printf ("%s\n", copyright
);
773 printf ("GNU Emacs comes with ABSOLUTELY NO WARRANTY.\n");
774 printf ("You may redistribute copies of Emacs\n");
775 printf ("under the terms of the GNU General Public License.\n");
776 printf ("For more information about these matters, ");
777 printf ("see the file named COPYING.\n");
781 if (argmatch (argv
, argc
, "-chdir", "--chdir", 4, &ch_to_dir
, &skip_args
))
782 if (chdir (ch_to_dir
) == -1)
784 fprintf (stderr
, "%s: Can't chdir to %s: %s\n",
785 argv
[0], ch_to_dir
, strerror (errno
));
790 #ifdef HAVE_PERSONALITY_LINUX32
792 && (strcmp (argv
[argc
-1], "dump") == 0
793 || strcmp (argv
[argc
-1], "bootstrap") == 0)
794 && ! getenv ("EMACS_HEAP_EXEC"))
796 static char heapexec
[] = "EMACS_HEAP_EXEC=true";
797 /* Set this so we only do this once. */
800 /* A flag to turn off address randomization which is introduced
801 in linux kernel shipped with fedora core 4 */
802 #define ADD_NO_RANDOMIZE 0x0040000
803 personality (PER_LINUX32
| ADD_NO_RANDOMIZE
);
804 #undef ADD_NO_RANDOMIZE
806 execvp (argv
[0], argv
);
808 /* If the exec fails, try to dump anyway. */
811 #endif /* HAVE_PERSONALITY_LINUX32 */
813 #if defined (HAVE_SETRLIMIT) && defined (RLIMIT_STACK)
814 /* Extend the stack space available.
815 Don't do that if dumping, since some systems (e.g. DJGPP)
816 might define a smaller stack limit at that time. */
819 && (!noninteractive
|| initialized
)
821 && !getrlimit (RLIMIT_STACK
, &rlim
))
824 extern size_t re_max_failures
;
825 /* Approximate the amount regex.c needs per unit of re_max_failures. */
826 int ratio
= 20 * sizeof (char *);
827 /* Then add 33% to cover the size of the smaller stacks that regex.c
828 successively allocates and discards, on its way to the maximum. */
830 /* Add in some extra to cover
831 what we're likely to use for other reasons. */
832 newlim
= re_max_failures
* ratio
+ 200000;
834 /* NetBSD (at least NetBSD 1.2G and former) has a bug in its
835 stack allocation routine for new process that the allocation
836 fails if stack limit is not on page boundary. So, round up the
837 new limit to page boundary. */
838 newlim
= (newlim
+ getpagesize () - 1) / getpagesize () * getpagesize();
840 if (newlim
> rlim
.rlim_max
)
842 newlim
= rlim
.rlim_max
;
843 /* Don't let regex.c overflow the stack we have. */
844 re_max_failures
= (newlim
- 200000) / ratio
;
846 if (rlim
.rlim_cur
< newlim
)
847 rlim
.rlim_cur
= newlim
;
849 setrlimit (RLIMIT_STACK
, &rlim
);
851 #endif /* HAVE_SETRLIMIT and RLIMIT_STACK */
853 /* Record (approximately) where the stack begins. */
854 stack_bottom
= &stack_bottom_variable
;
858 #ifndef SYSTEM_MALLOC
859 /* Arrange to get warning messages as memory fills up. */
860 memory_warnings (0, malloc_warning
);
862 /* Call malloc at least once, to run the initial __malloc_hook.
863 Also call realloc and free for consistency. */
864 free (realloc (malloc (4), 4));
867 /* Arrange to disable interrupt input inside malloc etc. */
868 uninterrupt_malloc ();
869 # endif /* not SYNC_INPUT */
870 #endif /* not SYSTEM_MALLOC */
872 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
873 main_thread
= pthread_self ();
874 #endif /* FORWARD_SIGNAL_TO_MAIN_THREAD */
876 #if defined (MSDOS) || defined (WINDOWSNT)
877 /* We do all file input/output as binary files. When we need to translate
878 newlines, we do that manually. */
880 #endif /* MSDOS || WINDOWSNT */
883 if (!isatty (fileno (stdin
)))
884 setmode (fileno (stdin
), O_BINARY
);
885 if (!isatty (fileno (stdout
)))
888 setmode (fileno (stdout
), O_BINARY
);
892 /* Skip initial setlocale if LC_ALL is "C", as it's not needed in that case.
893 The build procedure uses this while dumping, to ensure that the
894 dumped Emacs does not have its system locale tables initialized,
895 as that might cause screwups when the dumped Emacs starts up. */
897 char *lc_all
= getenv ("LC_ALL");
898 do_initial_setlocale
= ! lc_all
|| strcmp (lc_all
, "C");
901 /* Set locale now, so that initial error messages are localized properly.
902 fixup_locale must wait until later, since it builds strings. */
903 if (do_initial_setlocale
)
904 setlocale (LC_ALL
, "");
906 inhibit_window_system
= 0;
908 /* Handle the -t switch, which specifies filename to use as terminal. */
912 if (argmatch (argv
, argc
, "-t", "--terminal", 4, &term
, &skip_args
))
917 result
= emacs_open (term
, O_RDWR
, 0);
918 if (result
< 0 || dup (0) < 0)
920 char *errstring
= strerror (errno
);
921 fprintf (stderr
, "%s: %s: %s\n", argv
[0], term
, errstring
);
926 fprintf (stderr
, "%s: %s: not a tty\n", argv
[0], term
);
929 fprintf (stderr
, "Using %s\n", term
);
930 #ifdef HAVE_WINDOW_SYSTEM
931 inhibit_window_system
= 1; /* -t => -nw */
938 /* Command line option --no-windows is deprecated and thus not mentioned
939 in the manual and usage informations. */
940 if (argmatch (argv
, argc
, "-nw", "--no-window-system", 6, NULL
, &skip_args
)
941 || argmatch (argv
, argc
, "-nw", "--no-windows", 6, NULL
, &skip_args
))
942 inhibit_window_system
= 1;
944 /* Handle the -batch switch, which means don't do interactive display. */
946 if (argmatch (argv
, argc
, "-batch", "--batch", 5, NULL
, &skip_args
))
949 Vundo_outer_limit
= Qnil
;
951 if (argmatch (argv
, argc
, "-script", "--script", 3, &junk
, &skip_args
))
953 noninteractive
= 1; /* Set batch mode. */
954 /* Convert --script to -scriptload, un-skip it, and sort again
955 so that it will be handled in proper sequence. */
956 /* FIXME broken for --script=FILE - is that supposed to work? */
957 argv
[skip_args
- 1] = (char *) "-scriptload";
959 sort_args (argc
, argv
);
962 /* Handle the --help option, which gives a usage message. */
963 if (argmatch (argv
, argc
, "-help", "--help", 3, NULL
, &skip_args
))
965 printf (USAGE1
, argv
[0], USAGE2
);
971 if (argmatch (argv
, argc
, "-daemon", "--daemon", 5, NULL
, &skip_args
)
972 || argmatch (argv
, argc
, "-daemon", "--daemon", 5, &dname_arg
, &skip_args
))
977 /* Start as a daemon: fork a new child process which will run the
978 rest of the initialization code, then exit.
980 Detaching a daemon requires the following steps:
984 - close the tty file-descriptors
986 We only want to do the last 2 steps once the daemon is ready to
987 serve requests, i.e. after loading .emacs (initialization).
988 OTOH initialization may start subprocesses (e.g. ispell) and these
989 should be run from the proper process (the one that will end up
990 running as daemon) and with the proper "session id" in order for
991 them to keep working after detaching, so fork and setsid need to be
992 performed before initialization.
994 We want to avoid exiting before the server socket is ready, so
995 use a pipe for synchronization. The parent waits for the child
996 to close its end of the pipe (using `daemon-initialized')
998 if (pipe (daemon_pipe
) == -1)
1000 fprintf (stderr
, "Cannot pipe!\n");
1004 #ifndef NS_IMPL_COCOA
1006 #else /* NS_IMPL_COCOA */
1007 /* Under Cocoa we must do fork+exec as CoreFoundation lib fails in
1008 forked process: http://developer.apple.com/ReleaseNotes/
1009 CoreFoundation/CoreFoundation.html)
1010 We mark being in the exec'd process by a daemon name argument of
1011 form "--daemon=\nFD0,FD1\nNAME" where FD are the pipe file descriptors,
1012 NAME is the original daemon name, if any. */
1013 if (!dname_arg
|| !strchr (dname_arg
, '\n'))
1014 f
= fork (); /* in orig */
1016 f
= 0; /* in exec'd */
1017 #endif /* NS_IMPL_COCOA */
1023 /* Close unused writing end of the pipe. */
1024 close (daemon_pipe
[1]);
1026 /* Just wait for the child to close its end of the pipe. */
1029 retval
= read (daemon_pipe
[0], &buf
, 1);
1031 while (retval
== -1 && errno
== EINTR
);
1035 fprintf (stderr
, "Error reading status from child\n");
1038 else if (retval
== 0)
1040 fprintf (stderr
, "Error: server did not start correctly\n");
1044 close (daemon_pipe
[0]);
1049 fprintf (stderr
, "Cannot fork!\n");
1053 #ifdef NS_IMPL_COCOA
1055 /* In orig process, forked as child, OR in exec'd. */
1056 if (!dname_arg
|| !strchr (dname_arg
, '\n'))
1057 { /* In orig, child: now exec w/special daemon name. */
1060 if (dname_arg
&& strlen (dname_arg
) > 70)
1062 fprintf (stderr
, "daemon: child name too long\n");
1066 sprintf (fdStr
, "--daemon=\n%d,%d\n%s", daemon_pipe
[0],
1067 daemon_pipe
[1], dname_arg
? dname_arg
: "");
1068 argv
[skip_args
] = fdStr
;
1070 execv (argv
[0], argv
);
1071 fprintf (stderr
, "emacs daemon: exec failed: %d\n", errno
);
1075 /* In exec'd: parse special dname into pipe and name info. */
1076 if (!dname_arg
|| !strchr (dname_arg
, '\n')
1077 || strlen (dname_arg
) < 1 || strlen (dname_arg
) > 70)
1079 fprintf (stderr
, "emacs daemon: daemon name absent or too long\n");
1082 dname_arg2
[0] = '\0';
1083 sscanf (dname_arg
, "\n%d,%d\n%s", &(daemon_pipe
[0]), &(daemon_pipe
[1]),
1085 dname_arg
= strlen (dname_arg2
) ? dname_arg2
: NULL
;
1087 #endif /* NS_IMPL_COCOA */
1090 daemon_name
= xstrdup (dname_arg
);
1091 /* Close unused reading end of the pipe. */
1092 close (daemon_pipe
[0]);
1093 /* Make sure that the used end of the pipe is closed on exec, so
1094 that it is not accessible to programs started from .emacs. */
1095 fcntl (daemon_pipe
[1], F_SETFD
, FD_CLOEXEC
);
1101 fprintf (stderr
, "This platform does not support the -daemon flag.\n");
1106 if (! noninteractive
)
1108 #if defined (USG5) && defined (INTERRUPT_INPUT)
1111 #if defined (HAVE_GTK_AND_PTHREAD) && !defined (SYSTEM_MALLOC) && !defined (DOUG_LEA_MALLOC)
1113 extern void malloc_enable_thread (void);
1115 malloc_enable_thread ();
1122 /* Don't catch SIGHUP if dumping. */
1129 sigblock (sigmask (SIGHUP
));
1130 /* In --batch mode, don't catch SIGHUP if already ignored.
1131 That makes nohup work. */
1132 if (! noninteractive
1133 || signal (SIGHUP
, SIG_IGN
) != SIG_IGN
)
1134 signal (SIGHUP
, fatal_error_signal
);
1135 sigunblock (sigmask (SIGHUP
));
1140 ! noninteractive
|| initialized
1146 /* Don't catch these signals in batch mode if dumping.
1147 On some machines, this sets static data that would make
1148 signal fail to work right when the dumped Emacs is run. */
1149 signal (SIGQUIT
, fatal_error_signal
);
1150 signal (SIGILL
, fatal_error_signal
);
1151 signal (SIGTRAP
, fatal_error_signal
);
1153 add_user_signal (SIGUSR1
, "sigusr1");
1156 add_user_signal (SIGUSR2
, "sigusr2");
1159 signal (SIGABRT
, fatal_error_signal
);
1162 signal (SIGHWE
, fatal_error_signal
);
1165 signal (SIGPRE
, fatal_error_signal
);
1168 signal (SIGORE
, fatal_error_signal
);
1171 signal (SIGUME
, fatal_error_signal
);
1174 signal (SIGDLK
, fatal_error_signal
);
1177 signal (SIGCPULIM
, fatal_error_signal
);
1180 /* This is missing on some systems - OS/2, for example. */
1181 signal (SIGIOT
, fatal_error_signal
);
1184 signal (SIGEMT
, fatal_error_signal
);
1186 signal (SIGFPE
, fatal_error_signal
);
1188 signal (SIGBUS
, fatal_error_signal
);
1190 signal (SIGSEGV
, fatal_error_signal
);
1192 signal (SIGSYS
, fatal_error_signal
);
1194 /* May need special treatment on MS-Windows. See
1195 http://lists.gnu.org/archive/html/emacs-devel/2010-09/msg01062.html
1196 Please update the doc of kill-emacs, kill-emacs-hook, and
1197 NEWS if you change this.
1199 if (noninteractive
) signal (SIGINT
, fatal_error_signal
);
1200 signal (SIGTERM
, fatal_error_signal
);
1202 signal (SIGXCPU
, fatal_error_signal
);
1205 signal (SIGXFSZ
, fatal_error_signal
);
1206 #endif /* SIGXFSZ */
1209 /* This just means available memory is getting low. */
1210 signal (SIGDANGER
, memory_warning_signal
);
1214 /* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU. */
1215 signal (SIGXCPU
, fatal_error_signal
);
1216 signal (SIGIOINT
, fatal_error_signal
);
1217 signal (SIGGRANT
, fatal_error_signal
);
1218 signal (SIGRETRACT
, fatal_error_signal
);
1219 signal (SIGSOUND
, fatal_error_signal
);
1220 signal (SIGMSG
, fatal_error_signal
);
1224 noninteractive1
= noninteractive
;
1226 /* Perform basic initializations (not merely interning symbols). */
1233 init_character_once ();
1234 init_charset_once ();
1235 init_coding_once ();
1236 init_syntax_once (); /* Create standard syntax table. */
1237 init_category_once (); /* Create standard category table. */
1238 /* Must be done before init_buffer. */
1239 init_casetab_once ();
1240 init_buffer_once (); /* Create buffer table and some buffers. */
1241 init_minibuf_once (); /* Create list of minibuffers. */
1242 /* Must precede init_window_once. */
1244 /* Call syms_of_xfaces before init_window_once because that
1245 function creates Vterminal_frame. Termcap frames now use
1246 faces, and the face implementation uses some symbols as
1249 /* XXX syms_of_keyboard uses some symbols in keymap.c. It would
1250 be better to arrange things not to have this dependency. */
1252 /* Call syms_of_keyboard before init_window_once because
1253 keyboard sets up symbols that include some face names that
1254 the X support will want to use. This can happen when
1255 CANNOT_DUMP is defined. */
1256 syms_of_keyboard ();
1258 /* Called before syms_of_fileio, because it sets up Qerror_condition. */
1261 /* Before syms_of_coding to initialize Vgc_cons_threshold. */
1263 /* Before syms_of_coding because it initializes Qcharsetp. */
1265 /* Before init_window_once, because it sets up the
1266 Vcoding_system_hash_table. */
1267 syms_of_coding (); /* This should be after syms_of_fileio. */
1269 init_window_once (); /* Init the window system. */
1270 #ifdef HAVE_WINDOW_SYSTEM
1271 init_fringe_once (); /* Swap bitmaps if necessary. */
1272 #endif /* HAVE_WINDOW_SYSTEM */
1277 if (do_initial_setlocale
)
1280 Vsystem_messages_locale
= Vprevious_system_messages_locale
;
1281 Vsystem_time_locale
= Vprevious_system_time_locale
;
1286 #ifdef CLASH_DETECTION
1290 running_asynch_code
= 0;
1293 = argmatch (argv
, argc
, "-nl", "--no-loadup", 6, NULL
, &skip_args
);
1296 = argmatch (argv
, argc
, "-nsl", "--no-site-lisp", 11, NULL
, &skip_args
);
1299 ns_alloc_autorelease_pool();
1300 if (!noninteractive
)
1302 #ifdef NS_IMPL_COCOA
1303 if (skip_args
< argc
)
1305 /* FIXME: Do the right thing if getenv returns NULL, or if
1307 if (!strncmp(argv
[skip_args
], "-psn", 4))
1310 chdir (getenv ("HOME"));
1312 else if (skip_args
+1 < argc
&& !strncmp(argv
[skip_args
+1], "-psn", 4))
1315 chdir (getenv ("HOME"));
1320 #endif /* HAVE_NS */
1322 #ifdef HAVE_X_WINDOWS
1323 /* Stupid kludge to catch command-line display spec. We can't
1324 handle this argument entirely in window system dependent code
1325 because we don't even know which window system dependent code
1326 to run until we've recognized this argument. */
1328 char *displayname
= 0;
1329 int count_before
= skip_args
;
1331 /* Skip any number of -d options, but only use the last one. */
1334 int count_before_this
= skip_args
;
1336 if (argmatch (argv
, argc
, "-d", "--display", 3, &displayname
, &skip_args
))
1338 else if (argmatch (argv
, argc
, "-display", 0, 3, &displayname
, &skip_args
))
1343 count_before
= count_before_this
;
1346 /* If we have the form --display=NAME,
1347 convert it into -d name.
1348 This requires inserting a new element into argv. */
1349 if (displayname
!= 0 && skip_args
- count_before
== 1)
1351 char **new = (char **) xmalloc (sizeof (char *) * (argc
+ 2));
1354 for (j
= 0; j
< count_before
+ 1; j
++)
1356 new[count_before
+ 1] = (char *) "-d";
1357 new[count_before
+ 2] = displayname
;
1358 for (j
= count_before
+ 2; j
<argc
; j
++)
1359 new[j
+ 1] = argv
[j
];
1363 /* Change --display to -d, when its arg is separate. */
1364 else if (displayname
!= 0 && skip_args
> count_before
1365 && argv
[count_before
+ 1][1] == '-')
1366 argv
[count_before
+ 1] = (char *) "-d";
1370 if (argmatch (argv
, argc
, "-Q", "--quick", 3, NULL
, &skip_args
)
1371 || argmatch (argv
, argc
, "-quick", 0, 2, NULL
, &skip_args
))
1375 /* Don't actually discard this arg. */
1376 skip_args
= count_before
;
1378 #else /* !HAVE_X_WINDOWS */
1381 int count_before
= skip_args
;
1383 if (argmatch (argv
, argc
, "-Q", "--quick", 3, NULL
, &skip_args
)
1384 || argmatch (argv
, argc
, "-quick", 0, 2, NULL
, &skip_args
))
1387 skip_args
= count_before
;
1391 /* argmatch must not be used after here,
1392 except when bulding temacs
1393 because the -d argument has not been skipped in skip_args. */
1396 /* Call early 'cause init_environment needs it. */
1398 /* Set defaults for several environment variables. */
1400 init_environment (argc
, argv
, skip_args
);
1407 /* Initialize environment from registry settings. */
1408 init_environment (argv
);
1409 init_ntproc (); /* must precede init_editfns. */
1419 /* Initialize and GC-protect Vinitial_environment and
1420 Vprocess_environment before set_initial_environment fills them
1423 syms_of_callproc ();
1424 /* egetenv is a pretty low-level facility, which may get called in
1425 many circumstances; it seems flimsy to put off initializing it
1426 until calling init_callproc. */
1427 set_initial_environment ();
1428 /* AIX crashes are reported in system versions 3.2.3 and 3.2.4
1429 if this is not done. Do it after set_global_environment so that we
1430 don't pollute Vglobal_environment. */
1431 /* Setting LANG here will defeat the startup locale processing... */
1436 init_buffer (); /* Init default directory of main buffer. */
1438 init_callproc_1 (); /* Must precede init_cmdargs and init_sys_modes. */
1439 init_cmdargs (argc
, argv
, skip_args
); /* Must precede init_lread. */
1443 /* Erase any pre-dump messages in the message log, to avoid confusion. */
1444 Lisp_Object old_log_max
;
1445 old_log_max
= Vmessage_log_max
;
1446 XSETFASTINT (Vmessage_log_max
, 0);
1447 message_dolog ("", 0, 1, 0);
1448 Vmessage_log_max
= old_log_max
;
1451 init_callproc (); /* Must follow init_cmdargs but not init_sys_modes. */
1454 /* Intern the names of all standard functions and variables;
1455 define standard keys. */
1459 /* The basic levels of Lisp must come first. Note that
1460 syms_of_data and some others have already been called. */
1466 syms_of_floatfns ();
1469 syms_of_bytecode ();
1471 syms_of_casefiddle ();
1473 syms_of_category ();
1475 syms_of_character ();
1482 syms_of_filelock ();
1485 /* syms_of_keymap (); */
1493 syms_of_terminal ();
1499 syms_of_textprop ();
1500 syms_of_composite ();
1503 #endif /* WINDOWSNT */
1507 #ifdef HAVE_WINDOW_SYSTEM
1510 #endif /* HAVE_WINDOW_SYSTEM */
1511 #ifdef HAVE_X_WINDOWS
1516 syms_of_xsettings ();
1523 #endif /* HAVE_X_WINDOWS */
1534 syms_of_w32select ();
1537 #endif /* HAVE_NTGUI */
1543 syms_of_win16select();
1550 syms_of_nsselect ();
1552 #endif /* HAVE_NS */
1559 syms_of_dbusbind ();
1560 #endif /* HAVE_DBUS */
1564 #endif /* WINDOWSNT */
1566 keys_of_casefiddle ();
1569 keys_of_keyboard ();
1575 /* Initialization that must be done even if the global variable
1576 initialized is non zero. */
1578 globals_of_w32fns ();
1579 globals_of_w32menu ();
1580 globals_of_w32select ();
1581 #endif /* HAVE_NTGUI */
1586 init_editfns (); /* init_process uses Voperating_system_release. */
1587 init_process (); /* init_display uses add_keyboard_wait_descriptor. */
1588 init_keyboard (); /* This too must precede init_sys_modes. */
1589 if (!noninteractive
)
1590 init_display (); /* Determine terminal type. Calls init_sys_modes. */
1593 #ifdef HAVE_WINDOW_SYSTEM
1596 #endif /* HAVE_WINDOW_SYSTEM */
1608 /* Handle -l loadup, args passed by Makefile. */
1609 if (argmatch (argv
, argc
, "-l", "--load", 3, &file
, &skip_args
))
1610 Vtop_level
= Fcons (intern_c_string ("load"),
1611 Fcons (build_string (file
), Qnil
));
1612 /* Unless next switch is -nl, load "loadup.el" first thing. */
1614 Vtop_level
= Fcons (intern_c_string ("load"),
1615 Fcons (build_string ("loadup.el"), Qnil
));
1622 /* If the execution TZ happens to be the same as the dump TZ,
1623 change it to some other value and then change it back,
1624 to force the underlying implementation to reload the TZ info.
1625 This is needed on implementations that load TZ info from files,
1626 since the TZ file contents may differ between dump and execution. */
1627 char *tz
= getenv ("TZ");
1628 if (tz
&& !strcmp (tz
, dump_tz
))
1638 /* Set up for profiling. This is known to work on FreeBSD,
1639 GNU/Linux and MinGW. It might work on some other systems too.
1640 Give it a try and tell us if it works on your system. To compile
1641 for profiling, use the configure option --enable-profiling. */
1642 #if defined (__FreeBSD__) || defined (GNU_LINUX) || defined(__MINGW32__)
1646 extern void _mcleanup ();
1648 extern unsigned char etext
asm ("etext");
1652 #ifdef HAVE___EXECUTABLE_START
1653 /* This symbol is defined by GNU ld to the start of the text
1655 extern char __executable_start
[];
1657 extern void safe_bcopy ();
1661 #ifdef HAVE___EXECUTABLE_START
1662 monstartup (__executable_start
, &etext
);
1664 /* This uses safe_bcopy because that function comes first in the
1665 Emacs executable. It might be better to use something that
1666 gives the start of the text segment, but start_of_text is not
1667 defined on all systems now. */
1668 /* FIXME: Does not work on architectures with function
1670 monstartup (safe_bcopy
, &etext
);
1680 #ifdef LOCALTIME_CACHE
1681 /* Some versions of localtime have a bug. They cache the value of the time
1682 zone rather than looking it up every time. Since localtime() is
1683 called to bolt the undumping time into the undumped emacs, this
1684 results in localtime ignoring the TZ environment variable.
1685 This flushes the new TZ value into localtime. */
1687 #endif /* defined (LOCALTIME_CACHE) */
1689 /* Enter editor command loop. This never returns. */
1695 /* Sort the args so we can find the most important ones
1696 at the beginning of argv. */
1698 /* First, here's a table of all the standard options. */
1700 struct standard_args
1703 const char *longname
;
1708 static const struct standard_args standard_args
[] =
1710 { "-version", "--version", 150, 0 },
1711 { "-chdir", "--chdir", 130, 1 },
1712 { "-t", "--terminal", 120, 1 },
1713 { "-nw", "--no-window-system", 110, 0 },
1714 { "-nw", "--no-windows", 110, 0 },
1715 { "-batch", "--batch", 100, 0 },
1716 { "-script", "--script", 100, 1 },
1717 { "-daemon", "--daemon", 99, 0 },
1718 { "-help", "--help", 90, 0 },
1719 { "-nl", "--no-loadup", 70, 0 },
1720 { "-nsl", "--no-site-lisp", 65, 0 },
1721 /* -d must come last before the options handled in startup.el. */
1722 { "-d", "--display", 60, 1 },
1723 { "-display", 0, 60, 1 },
1724 /* Now for the options handled in `command-line' (startup.el). */
1725 /* (Note that to imply -nsl, -Q is partially handled here.) */
1726 { "-Q", "--quick", 55, 0 },
1727 { "-quick", 0, 55, 0 },
1728 { "-q", "--no-init-file", 50, 0 },
1729 { "-no-init-file", 0, 50, 0 },
1730 { "-no-site-file", "--no-site-file", 40, 0 },
1731 { "-u", "--user", 30, 1 },
1732 { "-user", 0, 30, 1 },
1733 { "-debug-init", "--debug-init", 20, 0 },
1734 { "-iconic", "--iconic", 15, 0 },
1735 { "-D", "--basic-display", 12, 0},
1736 { "-basic-display", 0, 12, 0},
1737 { "-nbc", "--no-blinking-cursor", 12, 0 },
1738 /* Now for the options handled in `command-line-1' (startup.el). */
1739 { "-nbi", "--no-bitmap-icon", 10, 0 },
1740 { "-bg", "--background-color", 10, 1 },
1741 { "-background", 0, 10, 1 },
1742 { "-fg", "--foreground-color", 10, 1 },
1743 { "-foreground", 0, 10, 1 },
1744 { "-bd", "--border-color", 10, 1 },
1745 { "-bw", "--border-width", 10, 1 },
1746 { "-ib", "--internal-border", 10, 1 },
1747 { "-ms", "--mouse-color", 10, 1 },
1748 { "-cr", "--cursor-color", 10, 1 },
1749 { "-fn", "--font", 10, 1 },
1750 { "-font", 0, 10, 1 },
1751 { "-fs", "--fullscreen", 10, 0 },
1752 { "-fw", "--fullwidth", 10, 0 },
1753 { "-fh", "--fullheight", 10, 0 },
1754 { "-mm", "--maximized", 10, 0 },
1755 { "-g", "--geometry", 10, 1 },
1756 { "-geometry", 0, 10, 1 },
1757 { "-T", "--title", 10, 1 },
1758 { "-title", 0, 10, 1 },
1759 { "-name", "--name", 10, 1 },
1760 { "-xrm", "--xrm", 10, 1 },
1761 { "-parent-id", "--parent-id", 10, 1 },
1762 { "-r", "--reverse-video", 5, 0 },
1764 { "-reverse", 0, 5, 0 },
1765 { "-hb", "--horizontal-scroll-bars", 5, 0 },
1766 { "-vb", "--vertical-scroll-bars", 5, 0 },
1767 { "-color", "--color", 5, 0},
1768 { "-no-splash", "--no-splash", 3, 0 },
1769 { "-no-desktop", "--no-desktop", 3, 0 },
1771 { "-NSAutoLaunch", 0, 5, 1 },
1772 { "-NXAutoLaunch", 0, 5, 1 },
1773 { "-disable-font-backend", "--disable-font-backend", 65, 0 },
1774 { "-_NSMachLaunch", 0, 85, 1 },
1775 { "-MachLaunch", 0, 85, 1 },
1776 { "-macosx", 0, 85, 0 },
1777 { "-NSHost", 0, 85, 1 },
1779 /* These have the same priority as ordinary file name args,
1780 so they are not reordered with respect to those. */
1781 { "-L", "--directory", 0, 1 },
1782 { "-directory", 0, 0, 1 },
1783 { "-l", "--load", 0, 1 },
1784 { "-load", 0, 0, 1 },
1785 /* This has no longname, because using --scriptload confuses sort_args,
1786 because then the --script long option seems to match twice; ie
1787 you can't have a long option which is a prefix of another long
1788 option. In any case, this is entirely an internal option. */
1789 { "-scriptload", NULL
, 0, 1 },
1790 { "-f", "--funcall", 0, 1 },
1791 { "-funcall", 0, 0, 1 },
1792 { "-eval", "--eval", 0, 1 },
1793 { "-execute", "--execute", 0, 1 },
1794 { "-find-file", "--find-file", 0, 1 },
1795 { "-visit", "--visit", 0, 1 },
1796 { "-file", "--file", 0, 1 },
1797 { "-insert", "--insert", 0, 1 },
1799 { "-NXOpen", 0, 0, 1 },
1800 { "-NXOpenTemp", 0, 0, 1 },
1801 { "-NSOpen", 0, 0, 1 },
1802 { "-NSOpenTemp", 0, 0, 1 },
1803 { "-GSFilePath", 0, 0, 1 },
1805 /* This should be processed after ordinary file name args and the like. */
1806 { "-kill", "--kill", -10, 0 },
1809 /* Reorder the elements of ARGV (assumed to have ARGC elements)
1810 so that the highest priority ones come first.
1811 Do not change the order of elements of equal priority.
1812 If an option takes an argument, keep it and its argument together.
1814 If an option that takes no argument appears more
1815 than once, eliminate all but one copy of it. */
1818 sort_args (int argc
, char **argv
)
1820 char **new = (char **) xmalloc (sizeof (char *) * argc
);
1821 /* For each element of argv,
1822 the corresponding element of options is:
1823 0 for an option that takes no arguments,
1824 1 for an option that takes one argument, etc.
1825 -1 for an ordinary non-option argument. */
1826 int *options
= (int *) xmalloc (sizeof (int) * argc
);
1827 int *priority
= (int *) xmalloc (sizeof (int) * argc
);
1829 int incoming_used
= 1;
1833 /* Categorize all the options,
1834 and figure out which argv elts are option arguments. */
1835 for (from
= 1; from
< argc
; from
++)
1839 if (argv
[from
][0] == '-')
1844 /* If we have found "--", don't consider
1845 any more arguments as options. */
1846 if (argv
[from
][1] == '-' && argv
[from
][2] == 0)
1848 /* Leave the "--", and everything following it, at the end. */
1849 for (; from
< argc
; from
++)
1851 priority
[from
] = -100;
1857 /* Look for a match with a known old-fashioned option. */
1858 for (i
= 0; i
< sizeof (standard_args
) / sizeof (standard_args
[0]); i
++)
1859 if (!strcmp (argv
[from
], standard_args
[i
].name
))
1861 options
[from
] = standard_args
[i
].nargs
;
1862 priority
[from
] = standard_args
[i
].priority
;
1863 if (from
+ standard_args
[i
].nargs
>= argc
)
1864 fatal ("Option `%s' requires an argument\n", argv
[from
]);
1865 from
+= standard_args
[i
].nargs
;
1869 /* Look for a match with a known long option.
1870 MATCH is -1 if no match so far, -2 if two or more matches so far,
1871 >= 0 (the table index of the match) if just one match so far. */
1872 if (argv
[from
][1] == '-')
1875 thislen
= strlen (argv
[from
]);
1876 equals
= strchr (argv
[from
], '=');
1878 thislen
= equals
- argv
[from
];
1881 i
< sizeof (standard_args
) / sizeof (standard_args
[0]); i
++)
1882 if (standard_args
[i
].longname
1883 && !strncmp (argv
[from
], standard_args
[i
].longname
,
1892 /* If we found exactly one match, use that. */
1895 options
[from
] = standard_args
[match
].nargs
;
1896 priority
[from
] = standard_args
[match
].priority
;
1897 /* If --OPTION=VALUE syntax is used,
1898 this option uses just one argv element. */
1901 if (from
+ options
[from
] >= argc
)
1902 fatal ("Option `%s' requires an argument\n", argv
[from
]);
1903 from
+= options
[from
];
1905 /* FIXME When match < 0, shouldn't there be some error,
1906 or at least indication to the user that there was a
1913 /* Copy the arguments, in order of decreasing priority, to NEW. */
1915 while (incoming_used
< argc
)
1918 int best_priority
= -9999;
1920 /* Find the highest priority remaining option.
1921 If several have equal priority, take the first of them. */
1922 for (from
= 1; from
< argc
; from
++)
1924 if (argv
[from
] != 0 && priority
[from
] > best_priority
)
1926 best_priority
= priority
[from
];
1929 /* Skip option arguments--they are tied to the options. */
1930 if (options
[from
] > 0)
1931 from
+= options
[from
];
1937 /* Copy the highest priority remaining option, with its args, to NEW.
1938 Unless it is a duplicate of the previous one. */
1939 if (! (options
[best
] == 0
1940 && ! strcmp (new[to
- 1], argv
[best
])))
1942 new[to
++] = argv
[best
];
1943 for (i
= 0; i
< options
[best
]; i
++)
1944 new[to
++] = argv
[best
+ i
+ 1];
1947 incoming_used
+= 1 + (options
[best
] > 0 ? options
[best
] : 0);
1949 /* Clear out this option in ARGV. */
1951 for (i
= 0; i
< options
[best
]; i
++)
1952 argv
[best
+ i
+ 1] = 0;
1955 /* If duplicate options were deleted, fill up extra space with null ptrs. */
1959 memcpy (argv
, new, sizeof (char *) * argc
);
1966 DEFUN ("kill-emacs", Fkill_emacs
, Skill_emacs
, 0, 1, "P",
1967 doc
: /* Exit the Emacs job and kill it.
1968 If ARG is an integer, return ARG as the exit program code.
1969 If ARG is a string, stuff it as keyboard input.
1971 This function is called upon receipt of the signals SIGTERM
1972 or SIGHUP, and upon SIGINT in batch mode.
1974 The value of `kill-emacs-hook', if not void,
1975 is a list of functions (of no args),
1976 all of which are called before Emacs is actually killed. */)
1979 struct gcpro gcpro1
;
1987 hook
= intern ("kill-emacs-hook");
1988 Frun_hooks (1, &hook
);
1992 #ifdef HAVE_X_WINDOWS
1993 /* Transfer any clipboards we own to the clipboard manager. */
1994 x_clipboard_manager_save_all ();
1997 shut_down_emacs (0, 0, STRINGP (arg
) ? arg
: Qnil
);
1999 /* If we have an auto-save list file,
2000 kill it because we are exiting Emacs deliberately (not crashing).
2001 Do it after shut_down_emacs, which does an auto-save. */
2002 if (STRINGP (Vauto_save_list_file_name
))
2003 unlink (SSDATA (Vauto_save_list_file_name
));
2005 exit (INTEGERP (arg
) ? XINT (arg
) : EXIT_SUCCESS
);
2009 /* Perform an orderly shutdown of Emacs. Autosave any modified
2010 buffers, kill any child processes, clean up the terminal modes (if
2011 we're in the foreground), and other stuff like that. Don't perform
2012 any redisplay; this may be called when Emacs is shutting down in
2013 the background, or after its X connection has died.
2015 If SIG is a signal number, print a message for it.
2017 This is called by fatal signal handlers, X protocol error handlers,
2021 shut_down_emacs (int sig
, int no_x
, Lisp_Object stuff
)
2023 /* Prevent running of hooks from now on. */
2026 /* Don't update display from now on. */
2027 Vinhibit_redisplay
= Qt
;
2029 /* If we are controlling the terminal, reset terminal modes. */
2032 int pgrp
= EMACS_GETPGRP (0);
2033 int tpgrp
= tcgetpgrp (0);
2034 if ((tpgrp
!= -1) && tpgrp
== pgrp
)
2036 reset_all_sys_modes ();
2037 if (sig
&& sig
!= SIGTERM
)
2038 fprintf (stderr
, "Fatal error (%d)", sig
);
2043 reset_all_sys_modes ();
2046 stuff_buffered_input (stuff
);
2048 inhibit_sentinels
= 1;
2049 kill_buffer_processes (Qnil
);
2050 Fdo_auto_save (Qt
, Qnil
);
2052 #ifdef CLASH_DETECTION
2053 unlock_all_files ();
2056 #if 0 /* This triggers a bug in XCloseDisplay and is not needed. */
2057 #ifdef HAVE_X_WINDOWS
2058 /* It's not safe to call intern here. Maybe we are crashing. */
2059 if (!noninteractive
&& SYMBOLP (Vinitial_window_system
)
2060 && SCHARS (SYMBOL_NAME (Vinitial_window_system
)) == 1
2061 && SREF (SYMBOL_NAME (Vinitial_window_system
), 0) == 'x'
2063 Fx_close_current_connection ();
2064 #endif /* HAVE_X_WINDOWS */
2068 /* There is a tendency for a SIGIO signal to arrive within exit,
2069 and cause a SIGHUP because the input descriptor is already closed. */
2071 signal (SIGIO
, SIG_IGN
);
2078 /* Do this only if terminating normally, we want glyph matrices
2079 etc. in a core dump. */
2080 if (sig
== 0 || sig
== SIGTERM
)
2082 check_glyph_memory ();
2083 check_message_stack ();
2091 ns_term_shutdown (sig
);
2101 DEFUN ("dump-emacs", Fdump_emacs
, Sdump_emacs
, 2, 2, 0,
2102 doc
: /* Dump current state of Emacs into executable file FILENAME.
2103 Take symbols from SYMFILE (presumably the file you executed to run Emacs).
2104 This is used in the file `loadup.el' when building Emacs.
2106 You must run Emacs in batch mode in order to dump it. */)
2107 (Lisp_Object filename
, Lisp_Object symfile
)
2111 int count
= SPECPDL_INDEX ();
2115 if (! noninteractive
)
2116 error ("Dumping Emacs works only in batch mode");
2120 /* Warn if the gap between BSS end and heap start is larger than this. */
2121 # define MAX_HEAP_BSS_DIFF (1024*1024)
2123 if (heap_bss_diff
> MAX_HEAP_BSS_DIFF
)
2125 fprintf (stderr
, "**************************************************\n");
2126 fprintf (stderr
, "Warning: Your system has a gap between BSS and the\n");
2127 fprintf (stderr
, "heap (%lu bytes). This usually means that exec-shield\n",
2129 fprintf (stderr
, "or something similar is in effect. The dump may\n");
2130 fprintf (stderr
, "fail because of this. See the section about\n");
2131 fprintf (stderr
, "exec-shield in etc/PROBLEMS for more information.\n");
2132 fprintf (stderr
, "**************************************************\n");
2134 #endif /* GNU_LINUX */
2136 /* Bind `command-line-processed' to nil before dumping,
2137 so that the dumped Emacs will process its command line
2138 and set up to work with X windows if appropriate. */
2139 symbol
= intern ("command-line-processed");
2140 specbind (symbol
, Qnil
);
2142 CHECK_STRING (filename
);
2143 filename
= Fexpand_file_name (filename
, Qnil
);
2144 if (!NILP (symfile
))
2146 CHECK_STRING (symfile
);
2147 if (SCHARS (symfile
))
2148 symfile
= Fexpand_file_name (symfile
, Qnil
);
2152 Vpurify_flag
= Qnil
;
2155 set_time_zone_rule (dump_tz
);
2156 #ifndef LOCALTIME_CACHE
2157 /* Force a tz reload, since set_time_zone_rule doesn't. */
2163 /* Tell malloc where start of impure now is. */
2164 /* Also arrange for warnings when nearly out of space. */
2165 #ifndef SYSTEM_MALLOC
2167 /* On Windows, this was done before dumping, and that once suffices.
2168 Meanwhile, my_edata is not valid on Windows. */
2170 extern char my_edata
[];
2171 memory_warnings (my_edata
, malloc_warning
);
2173 #endif /* not WINDOWSNT */
2174 #if defined (HAVE_GTK_AND_PTHREAD) && !defined SYNC_INPUT
2175 /* Pthread may call malloc before main, and then we will get an endless
2176 loop, because pthread_self (see alloc.c) calls malloc the first time
2177 it is called on some systems. */
2178 reset_malloc_hooks ();
2180 #endif /* not SYSTEM_MALLOC */
2181 #ifdef DOUG_LEA_MALLOC
2182 malloc_state_ptr
= malloc_get_state ();
2185 #ifdef USE_MMAP_FOR_BUFFERS
2188 unexec (SSDATA (filename
), !NILP (symfile
) ? SSDATA (symfile
) : 0);
2189 #ifdef USE_MMAP_FOR_BUFFERS
2192 #ifdef DOUG_LEA_MALLOC
2193 free (malloc_state_ptr
);
2198 return unbind_to (count
, Qnil
);
2201 #endif /* not CANNOT_DUMP */
2204 /* Recover from setlocale (LC_ALL, ""). */
2208 /* The Emacs Lisp reader needs LC_NUMERIC to be "C",
2209 so that numbers are read and printed properly for Emacs Lisp. */
2210 setlocale (LC_NUMERIC
, "C");
2213 /* Set system locale CATEGORY, with previous locale *PLOCALE, to
2216 synchronize_locale (int category
, Lisp_Object
*plocale
, Lisp_Object desired_locale
)
2218 if (! EQ (*plocale
, desired_locale
))
2220 *plocale
= desired_locale
;
2221 setlocale (category
, (STRINGP (desired_locale
)
2222 ? SSDATA (desired_locale
)
2227 /* Set system time locale to match Vsystem_time_locale, if possible. */
2229 synchronize_system_time_locale (void)
2231 synchronize_locale (LC_TIME
, &Vprevious_system_time_locale
,
2232 Vsystem_time_locale
);
2235 /* Set system messages locale to match Vsystem_messages_locale, if
2238 synchronize_system_messages_locale (void)
2241 synchronize_locale (LC_MESSAGES
, &Vprevious_system_messages_locale
,
2242 Vsystem_messages_locale
);
2245 #endif /* HAVE_SETLOCALE */
2252 decode_env_path (const char *evarname
, const char *defalt
)
2254 const char *path
, *p
;
2255 Lisp_Object lpath
, element
, tem
;
2257 /* It's okay to use getenv here, because this function is only used
2258 to initialize variables when Emacs starts up, and isn't called
2261 path
= getenv (evarname
);
2267 /* Ensure values from the environment use the proper directory separator. */
2270 char *path_copy
= alloca (strlen (path
) + 1);
2271 strcpy (path_copy
, path
);
2272 dostounix_filename (path_copy
);
2279 p
= strchr (path
, SEPCHAR
);
2281 p
= path
+ strlen (path
);
2282 element
= (p
- path
? make_string (path
, p
- path
)
2283 : build_string ("."));
2285 /* Add /: to the front of the name
2286 if it would otherwise be treated as magic. */
2287 tem
= Ffind_file_name_handler (element
, Qt
);
2289 /* However, if the handler says "I'm safe",
2290 don't bother adding /:. */
2294 prop
= Fget (tem
, intern ("safe-magic"));
2300 element
= concat2 (build_string ("/:"), element
);
2302 lpath
= Fcons (element
, lpath
);
2308 return Fnreverse (lpath
);
2311 DEFUN ("daemonp", Fdaemonp
, Sdaemonp
, 0, 0, 0,
2312 doc
: /* Return non-nil if the current emacs process is a daemon.
2313 If the daemon was given a name argument, return that name. */)
2318 return build_string (daemon_name
);
2325 DEFUN ("daemon-initialized", Fdaemon_initialized
, Sdaemon_initialized
, 0, 0, 0,
2326 doc
: /* Mark the Emacs daemon as being initialized.
2327 This finishes the daemonization process by doing the other half of detaching
2328 from the parent process and its tty file descriptors. */)
2335 error ("This function can only be called if emacs is run as a daemon");
2337 if (daemon_pipe
[1] < 0)
2338 error ("The daemon has already been initialized");
2340 if (NILP (Vafter_init_time
))
2341 error ("This function can only be called after loading the init files");
2343 /* Get rid of stdin, stdout and stderr. */
2344 nfd
= open ("/dev/null", O_RDWR
);
2346 err
|= dup2 (nfd
, 0) < 0;
2347 err
|= dup2 (nfd
, 1) < 0;
2348 err
|= dup2 (nfd
, 2) < 0;
2349 err
|= close (nfd
) != 0;
2351 /* Closing the pipe will notify the parent that it can exit.
2352 FIXME: In case some other process inherited the pipe, closing it here
2353 won't notify the parent because it's still open elsewhere, so we
2354 additionally send a byte, just to make sure the parent really exits.
2355 Instead, we should probably close the pipe in start-process and
2356 call-process to make sure the pipe is never inherited by
2358 err
|= write (daemon_pipe
[1], "\n", 1) < 0;
2359 err
|= close (daemon_pipe
[1]) != 0;
2360 /* Set it to an invalid value so we know we've already run this function. */
2361 daemon_pipe
[1] = -1;
2364 error ("I/O error during daemon initialization");
2369 syms_of_emacs (void)
2371 Qfile_name_handler_alist
= intern_c_string ("file-name-handler-alist");
2372 staticpro (&Qfile_name_handler_alist
);
2373 Qrisky_local_variable
= intern_c_string ("risky-local-variable");
2374 staticpro (&Qrisky_local_variable
);
2377 defsubr (&Sdump_emacs
);
2380 defsubr (&Skill_emacs
);
2382 defsubr (&Sinvocation_name
);
2383 defsubr (&Sinvocation_directory
);
2384 defsubr (&Sdaemonp
);
2385 defsubr (&Sdaemon_initialized
);
2387 DEFVAR_LISP ("command-line-args", Vcommand_line_args
,
2388 doc
: /* Args passed by shell to Emacs, as a list of strings.
2389 Many arguments are deleted from the list as they are processed. */);
2391 DEFVAR_LISP ("system-type", Vsystem_type
,
2392 doc
: /* The value is a symbol indicating the type of operating system you are using.
2394 `gnu' compiled for a GNU Hurd system.
2395 `gnu/linux' compiled for a GNU/Linux system.
2396 `gnu/kfreebsd' compiled for a GNU system with a FreeBSD kernel.
2397 `darwin' compiled for Darwin (GNU-Darwin, Mac OS X, ...).
2398 `ms-dos' compiled as an MS-DOS application.
2399 `windows-nt' compiled as a native W32 application.
2400 `cygwin' compiled using the Cygwin library.
2401 Anything else (in Emacs 24.1, the possibilities are: aix, berkeley-unix,
2402 hpux, irix, usg-unix-v) indicates some sort of Unix system. */);
2403 Vsystem_type
= intern_c_string (SYSTEM_TYPE
);
2404 /* The above values are from SYSTEM_TYPE in include files under src/s. */
2406 DEFVAR_LISP ("system-configuration", Vsystem_configuration
,
2407 doc
: /* Value is string indicating configuration Emacs was built for.
2408 On MS-Windows, the value reflects the OS flavor and version on which
2409 Emacs is running. */);
2410 Vsystem_configuration
= build_string (EMACS_CONFIGURATION
);
2412 DEFVAR_LISP ("system-configuration-options", Vsystem_configuration_options
,
2413 doc
: /* String containing the configuration options Emacs was built with. */);
2414 Vsystem_configuration_options
= build_string (EMACS_CONFIG_OPTIONS
);
2416 DEFVAR_BOOL ("noninteractive", noninteractive1
,
2417 doc
: /* Non-nil means Emacs is running without interactive terminal. */);
2419 DEFVAR_LISP ("kill-emacs-hook", Vkill_emacs_hook
,
2420 doc
: /* Hook to be run when `kill-emacs' is called.
2421 Since `kill-emacs' may be invoked when the terminal is disconnected (or
2422 in other similar situations), functions placed on this hook should not
2423 expect to be able to interact with the user. To ask for confirmation,
2424 see `kill-emacs-query-functions' instead.
2426 Before Emacs 24.1, the hook was not run in batch mode, i.e., if
2427 `noninteractive' was non-nil. */);
2428 Vkill_emacs_hook
= Qnil
;
2430 DEFVAR_LISP ("path-separator", Vpath_separator
,
2431 doc
: /* String containing the character that separates directories in
2432 search paths, such as PATH and other similar environment variables. */);
2435 Vpath_separator
= make_string (&c
, 1);
2438 DEFVAR_LISP ("invocation-name", Vinvocation_name
,
2439 doc
: /* The program name that was used to run Emacs.
2440 Any directory names are omitted. */);
2442 DEFVAR_LISP ("invocation-directory", Vinvocation_directory
,
2443 doc
: /* The directory in which the Emacs executable was found, to run it.
2444 The value is nil if that directory's name is not known. */);
2446 DEFVAR_LISP ("installation-directory", Vinstallation_directory
,
2447 doc
: /* A directory within which to look for the `lib-src' and `etc' directories.
2448 This is non-nil when we can't find those directories in their standard
2449 installed locations, but we can find them near where the Emacs executable
2451 Vinstallation_directory
= Qnil
;
2453 DEFVAR_LISP ("system-messages-locale", Vsystem_messages_locale
,
2454 doc
: /* System locale for messages. */);
2455 Vsystem_messages_locale
= Qnil
;
2457 DEFVAR_LISP ("previous-system-messages-locale",
2458 Vprevious_system_messages_locale
,
2459 doc
: /* Most recently used system locale for messages. */);
2460 Vprevious_system_messages_locale
= Qnil
;
2462 DEFVAR_LISP ("system-time-locale", Vsystem_time_locale
,
2463 doc
: /* System locale for time. */);
2464 Vsystem_time_locale
= Qnil
;
2466 DEFVAR_LISP ("previous-system-time-locale", Vprevious_system_time_locale
,
2467 doc
: /* Most recently used system locale for time. */);
2468 Vprevious_system_time_locale
= Qnil
;
2470 DEFVAR_LISP ("before-init-time", Vbefore_init_time
,
2471 doc
: /* Value of `current-time' before Emacs begins initialization. */);
2472 Vbefore_init_time
= Qnil
;
2474 DEFVAR_LISP ("after-init-time", Vafter_init_time
,
2475 doc
: /* Value of `current-time' after loading the init files.
2476 This is nil during initialization. */);
2477 Vafter_init_time
= Qnil
;
2479 DEFVAR_BOOL ("inhibit-x-resources", inhibit_x_resources
,
2480 doc
: /* If non-nil, X resources, Windows Registry settings, and NS defaults are not used. */);
2481 inhibit_x_resources
= 0;
2483 DEFVAR_LISP ("emacs-copyright", Vemacs_copyright
,
2484 doc
: /* Short copyright string for this version of Emacs. */);
2485 Vemacs_copyright
= build_string (emacs_copyright
);
2487 DEFVAR_LISP ("emacs-version", Vemacs_version
,
2488 doc
: /* Version numbers of this version of Emacs. */);
2489 Vemacs_version
= build_string (emacs_version
);
2491 DEFVAR_LISP ("dynamic-library-alist", Vdynamic_library_alist
,
2492 doc
: /* Alist of dynamic libraries vs external files implementing them.
2493 Each element is a list (LIBRARY FILE...), where the car is a symbol
2494 representing a supported external library, and the rest are strings giving
2495 alternate filenames for that library.
2497 Emacs tries to load the library from the files in the order they appear on
2498 the list; if none is loaded, the running session of Emacs won't have access
2501 Note that image types `pbm' and `xbm' do not need entries in this variable
2502 because they do not depend on external libraries and are always available.
2504 Also note that this is not a generic facility for accessing external
2505 libraries; only those already known by Emacs will be loaded. */);
2506 Vdynamic_library_alist
= Qnil
;
2507 Fput (intern_c_string ("dynamic-library-alist"), Qrisky_local_variable
, Qt
);
2509 /* Make sure IS_DAEMON starts up as false. */