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>
34 #include <windows.h> /* just for w32.h */
36 #include "w32heap.h" /* for prototype of sbrk */
39 #ifdef NS_IMPL_GNUSTEP
40 /* At least under Debian, GSConfig is in a subdirectory. --Stef */
41 #include <GNUstepBase/GSConfig.h>
46 #include "intervals.h"
51 #include "blockinput.h"
52 #include "syssignal.h"
55 #include "termhooks.h"
73 #include <sys/resource.h>
76 #ifdef HAVE_PERSONALITY_LINUX32
77 #include <sys/personality.h>
87 #define setpgrp setpgid
91 static const char emacs_version
[] = VERSION
;
92 static const char emacs_copyright
[] = "Copyright (C) 2011 Free Software Foundation, Inc.";
94 /* Make these values available in GDB, which doesn't see macros. */
97 int gdb_use_lsb EXTERNALLY_VISIBLE
= 1;
99 int gdb_use_lsb EXTERNALLY_VISIBLE
= 0;
101 #ifndef USE_LISP_UNION_TYPE
102 int gdb_use_union EXTERNALLY_VISIBLE
= 0;
104 int gdb_use_union EXTERNALLY_VISIBLE
= 1;
106 EMACS_INT gdb_valbits EXTERNALLY_VISIBLE
= VALBITS
;
107 EMACS_INT gdb_gctypebits EXTERNALLY_VISIBLE
= GCTYPEBITS
;
108 #if defined (DATA_SEG_BITS) && ! defined (USE_LSB_TAG)
109 EMACS_INT gdb_data_seg_bits EXTERNALLY_VISIBLE
= DATA_SEG_BITS
;
111 EMACS_INT gdb_data_seg_bits EXTERNALLY_VISIBLE
= 0;
113 EMACS_INT PVEC_FLAG EXTERNALLY_VISIBLE
= PSEUDOVECTOR_FLAG
;
114 EMACS_INT gdb_array_mark_flag EXTERNALLY_VISIBLE
= ARRAY_MARK_FLAG
;
115 /* GDB might say "No enum type named pvec_type" if we don't have at
116 least one symbol with that type, and then xbacktrace could fail. */
117 enum pvec_type gdb_pvec_type EXTERNALLY_VISIBLE
= PVEC_TYPE_MASK
;
119 /* Empty lisp strings. To avoid having to build any others. */
120 Lisp_Object empty_unibyte_string
, empty_multibyte_string
;
122 /* Set nonzero after Emacs has started up the first time.
123 Prevents reinitialization of the Lisp world and keymaps
124 on subsequent starts. */
127 #ifdef DOUG_LEA_MALLOC
128 /* Preserves a pointer to the memory allocated that copies that
129 static data inside glibc's malloc. */
130 static void *malloc_state_ptr
;
131 /* From glibc, a routine that returns a copy of the malloc internal state. */
132 extern void *malloc_get_state (void);
133 /* From glibc, a routine that overwrites the malloc internal state. */
134 extern int malloc_set_state (void*);
135 /* Non-zero if the MALLOC_CHECK_ environment variable was set while
136 dumping. Used to work around a bug in glibc's malloc. */
137 static int malloc_using_checking
;
140 Lisp_Object Qfile_name_handler_alist
;
142 Lisp_Object Qrisky_local_variable
;
144 /* If non-zero, Emacs should not attempt to use a window-specific code,
145 but instead should use the virtual terminal under which it was started. */
146 int inhibit_window_system
;
148 /* If non-zero, a filter or a sentinel is running. Tested to save the match
149 data on the first attempt to change it inside asynchronous code. */
150 int running_asynch_code
;
152 #if defined(HAVE_X_WINDOWS) || defined(HAVE_NS)
153 /* If non-zero, -d was specified, meaning we're using some window system. */
157 /* An address near the bottom of the stack.
158 Tells GC how to save a copy of the stack. */
161 /* The address where the heap starts (from the first sbrk (0) call). */
162 static void *my_heap_start
;
164 /* The gap between BSS end and heap start as far as we can tell. */
165 static unsigned long heap_bss_diff
;
167 /* If the gap between BSS end and heap start is larger than this
168 output a warning in dump-emacs. */
169 #define MAX_HEAP_BSS_DIFF (1024*1024)
171 /* Nonzero means running Emacs without interactive terminal. */
174 /* Nonzero means remove site-lisp directories from load-path. */
177 /* Name for the server started by the daemon.*/
178 static char *daemon_name
;
180 /* Pipe used to send exit notification to the daemon parent at
184 /* Save argv and argc. */
188 static void sort_args (int argc
, char **argv
);
189 static void syms_of_emacs (void);
191 /* MSVC needs each string be shorter than 2048 bytes, so the usage
192 strings below are split to not overflow this limit. */
194 Usage: %s [OPTION-OR-FILENAME]...\n\
196 Run Emacs, the extensible, customizable, self-documenting real-time\n\
197 display editor. The recommended way to start Emacs for normal editing\n\
198 is with no options at all.\n\
200 Run M-x info RET m emacs RET m emacs invocation RET inside Emacs to\n\
201 read the main documentation for these command-line arguments.\n\
203 Initialization options:\n\
205 --batch do not do interactive display; implies -q\n\
206 --chdir DIR change to directory DIR\n\
207 --daemon start a server in the background\n\
208 --debug-init enable Emacs Lisp debugger for init file\n\
209 --display, -d DISPLAY use X server DISPLAY\n\
210 --no-desktop do not load a saved desktop\n\
211 --no-init-file, -q load neither ~/.emacs nor default.el\n\
212 --no-shared-memory, -nl do not use shared memory\n\
213 --no-site-file do not load site-start.el\n\
214 --no-site-lisp, -nsl do not add site-lisp directories to load-path\n\
215 --no-splash do not display a splash screen on startup\n\
216 --no-window-system, -nw do not communicate with X, ignoring $DISPLAY\n\
217 --quick, -Q equivalent to:\n\
218 -q --no-site-file --no-site-lisp --no-splash\n\
219 --script FILE run FILE as an Emacs Lisp script\n\
220 --terminal, -t DEVICE use DEVICE for terminal I/O\n\
221 --user, -u USER load ~USER/.emacs instead of your own\n\
227 FILE visit FILE using find-file\n\
228 +LINE go to line LINE in next FILE\n\
229 +LINE:COLUMN go to line LINE, column COLUMN, in next FILE\n\
230 --directory, -L DIR add DIR to variable load-path\n\
231 --eval EXPR evaluate Emacs Lisp expression EXPR\n\
232 --execute EXPR evaluate Emacs Lisp expression EXPR\n\
233 --file FILE visit FILE using find-file\n\
234 --find-file FILE visit FILE using find-file\n\
235 --funcall, -f FUNC call Emacs Lisp function FUNC with no arguments\n\
236 --insert FILE insert contents of FILE into current buffer\n\
237 --kill exit without asking for confirmation\n\
238 --load, -l FILE load Emacs Lisp FILE using the load function\n\
239 --visit FILE visit FILE using find-file\n\
245 --background-color, -bg COLOR window background color\n\
246 --basic-display, -D disable many display features;\n\
247 used for debugging Emacs\n\
248 --border-color, -bd COLOR main border color\n\
249 --border-width, -bw WIDTH width of main border\n\
250 --color, --color=MODE override color mode for character terminals;\n\
251 MODE defaults to `auto', and\n\
252 can also be `never', `always',\n\
253 or a mode name like `ansi8'\n\
254 --cursor-color, -cr COLOR color of the Emacs cursor indicating point\n\
255 --font, -fn FONT default font; must be fixed-width\n\
256 --foreground-color, -fg COLOR window foreground color\n\
257 --fullheight, -fh make the first frame high as the screen\n\
258 --fullscreen, -fs make the first frame fullscreen\n\
259 --fullwidth, -fw make the first frame wide as the screen\n\
260 --maximized, -mm make the first frame maximized\n\
261 --geometry, -g GEOMETRY window geometry\n\
262 --no-bitmap-icon, -nbi do not use picture of gnu for Emacs icon\n\
263 --iconic start Emacs in iconified state\n\
264 --internal-border, -ib WIDTH width between text and main border\n\
265 --line-spacing, -lsp PIXELS additional space to put between lines\n\
266 --mouse-color, -ms COLOR mouse cursor color in Emacs window\n\
267 --name NAME title for initial Emacs frame\n\
268 --no-blinking-cursor, -nbc disable blinking cursor\n\
269 --reverse-video, -r, -rv switch foreground and background\n\
270 --title, -T TITLE title for initial Emacs frame\n\
271 --vertical-scroll-bars, -vb enable vertical scroll bars\n\
272 --xrm XRESOURCES set additional X resources\n\
273 --parent-id XID set parent window\n\
274 --help display this help and exit\n\
275 --version output version information and exit\n\
279 You can generally also specify long option names with a single -; for\n\
280 example, -batch as well as --batch. You can use any unambiguous\n\
281 abbreviation for a --option.\n\
283 Various environment variables and window system resources also affect\n\
284 Emacs' operation. See the main documentation.\n\
286 Report bugs to bug-gnu-emacs@gnu.org. First, please see the Bugs\n\
287 section of the Emacs manual or the file BUGS.\n"
290 /* Signal code for the fatal signal that was received. */
291 static int fatal_error_code
;
293 /* Nonzero if handling a fatal error already. */
294 int fatal_error_in_progress
;
296 /* If non-null, call this function from fatal_error_signal before
297 committing suicide. */
299 static void (*fatal_error_signal_hook
) (void);
301 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
302 /* When compiled with GTK and running under Gnome,
303 multiple threads may be created. Keep track of our main
304 thread to make sure signals are delivered to it (see syssignal.h). */
306 pthread_t main_thread
;
310 /* Handle bus errors, invalid instruction, etc. */
311 #ifndef FLOAT_CATCH_SIGILL
315 fatal_error_signal (int sig
)
317 SIGNAL_THREAD_CHECK (sig
);
318 fatal_error_code
= sig
;
319 signal (sig
, SIG_DFL
);
321 TOTALLY_UNBLOCK_INPUT
;
323 /* If fatal error occurs in code below, avoid infinite recursion. */
324 if (! fatal_error_in_progress
)
326 fatal_error_in_progress
= 1;
328 if (sig
== SIGTERM
|| sig
== SIGHUP
|| sig
== SIGINT
)
329 Fkill_emacs (make_number (sig
));
331 shut_down_emacs (sig
, 0, Qnil
);
334 /* Signal the same code; this time it will really be fatal.
335 Remember that since we're in a signal handler, the signal we're
336 going to send is probably blocked, so we have to unblock it if we
337 want to really receive it. */
339 sigunblock (sigmask (fatal_error_code
));
342 if (fatal_error_signal_hook
)
343 fatal_error_signal_hook ();
345 kill (getpid (), fatal_error_code
);
350 /* Handler for SIGDANGER. */
352 memory_warning_signal (sig
)
355 signal (sig
, memory_warning_signal
);
356 SIGNAL_THREAD_CHECK (sig
);
358 malloc_warning ("Operating system warns that virtual memory is running low.\n");
360 /* It might be unsafe to call do_auto_save now. */
361 force_auto_save_soon ();
365 /* We define abort, rather than using it from the library,
366 so that GDB can return from a breakpoint here.
367 MSDOS has its own definition in msdos.c. */
369 #if ! defined (DOS_NT) && ! defined (NO_ABORT)
374 kill (getpid (), SIGABRT
);
375 /* This shouldn't be executed, but it prevents a warning. */
381 /* Code for dealing with Lisp access to the Unix command line. */
384 init_cmdargs (int argc
, char **argv
, int skip_args
)
387 Lisp_Object name
, dir
, handler
;
388 int count
= SPECPDL_INDEX ();
389 Lisp_Object raw_name
;
394 raw_name
= build_string (argv
[0]);
396 /* Add /: to the front of the name
397 if it would otherwise be treated as magic. */
398 handler
= Ffind_file_name_handler (raw_name
, Qt
);
399 if (! NILP (handler
))
400 raw_name
= concat2 (build_string ("/:"), raw_name
);
402 Vinvocation_name
= Ffile_name_nondirectory (raw_name
);
403 Vinvocation_directory
= Ffile_name_directory (raw_name
);
405 /* If we got no directory in argv[0], search PATH to find where
406 Emacs actually came from. */
407 if (NILP (Vinvocation_directory
))
410 int yes
= openp (Vexec_path
, Vinvocation_name
,
411 Vexec_suffixes
, &found
, make_number (X_OK
));
414 /* Add /: to the front of the name
415 if it would otherwise be treated as magic. */
416 handler
= Ffind_file_name_handler (found
, Qt
);
417 if (! NILP (handler
))
418 found
= concat2 (build_string ("/:"), found
);
419 Vinvocation_directory
= Ffile_name_directory (found
);
423 if (!NILP (Vinvocation_directory
)
424 && NILP (Ffile_name_absolute_p (Vinvocation_directory
)))
425 /* Emacs was started with relative path, like ./emacs.
427 Vinvocation_directory
= Fexpand_file_name (Vinvocation_directory
, Qnil
);
429 Vinstallation_directory
= Qnil
;
431 if (!NILP (Vinvocation_directory
))
433 dir
= Vinvocation_directory
;
434 name
= Fexpand_file_name (Vinvocation_name
, dir
);
437 Lisp_Object tem
, lib_src_exists
;
438 Lisp_Object etc_exists
, info_exists
;
440 /* See if dir contains subdirs for use by Emacs.
441 Check for the ones that would exist in a build directory,
442 not including lisp and info. */
443 tem
= Fexpand_file_name (build_string ("lib-src"), dir
);
444 lib_src_exists
= Ffile_exists_p (tem
);
447 /* MSDOS installations frequently remove lib-src, but we still
448 must set installation-directory, or else info won't find
449 its files (it uses the value of installation-directory). */
450 tem
= Fexpand_file_name (build_string ("info"), dir
);
451 info_exists
= Ffile_exists_p (tem
);
456 if (!NILP (lib_src_exists
) || !NILP (info_exists
))
458 tem
= Fexpand_file_name (build_string ("etc"), dir
);
459 etc_exists
= Ffile_exists_p (tem
);
460 if (!NILP (etc_exists
))
462 Vinstallation_directory
463 = Ffile_name_as_directory (dir
);
468 /* See if dir's parent contains those subdirs. */
469 tem
= Fexpand_file_name (build_string ("../lib-src"), dir
);
470 lib_src_exists
= Ffile_exists_p (tem
);
474 /* See the MSDOS commentary above. */
475 tem
= Fexpand_file_name (build_string ("../info"), dir
);
476 info_exists
= Ffile_exists_p (tem
);
481 if (!NILP (lib_src_exists
) || !NILP (info_exists
))
483 tem
= Fexpand_file_name (build_string ("../etc"), dir
);
484 etc_exists
= Ffile_exists_p (tem
);
485 if (!NILP (etc_exists
))
487 tem
= Fexpand_file_name (build_string (".."), dir
);
488 Vinstallation_directory
489 = Ffile_name_as_directory (tem
);
494 /* If the Emacs executable is actually a link,
495 next try the dir that the link points into. */
496 tem
= Ffile_symlink_p (name
);
499 name
= Fexpand_file_name (tem
, dir
);
500 dir
= Ffile_name_directory (name
);
507 Vcommand_line_args
= Qnil
;
509 for (i
= argc
- 1; i
>= 0; i
--)
511 if (i
== 0 || i
> skip_args
)
512 /* For the moment, we keep arguments as is in unibyte strings.
513 They are decoded in the function command-line after we know
514 locale-coding-system. */
516 = Fcons (make_unibyte_string (argv
[i
], strlen (argv
[i
])),
520 unbind_to (count
, Qnil
);
523 DEFUN ("invocation-name", Finvocation_name
, Sinvocation_name
, 0, 0, 0,
524 doc
: /* Return the program name that was used to run Emacs.
525 Any directory names are omitted. */)
528 return Fcopy_sequence (Vinvocation_name
);
531 DEFUN ("invocation-directory", Finvocation_directory
, Sinvocation_directory
,
533 doc
: /* Return the directory name in which the Emacs executable was located. */)
536 return Fcopy_sequence (Vinvocation_directory
);
541 /* A valid but unlikely value for the TZ environment value.
542 It is OK (though a bit slower) if the user actually chooses this value. */
543 static char dump_tz
[] = "UtC0";
546 #ifndef ORDINARY_LINK
547 /* We don't include crtbegin.o and crtend.o in the link,
548 so these functions and variables might be missed.
549 Provide dummy definitions to avoid error.
550 (We don't have any real constructors or destructors.) */
553 /* Define a dummy function F. Declare F too, to pacify gcc
554 -Wmissing-prototypes. */
555 #define DEFINE_DUMMY_FUNCTION(f) \
556 void f (void) EXTERNALLY_VISIBLE; void f (void) {}
558 #ifndef GCC_CTORS_IN_LIBC
559 DEFINE_DUMMY_FUNCTION (__do_global_ctors
)
560 DEFINE_DUMMY_FUNCTION (__do_global_ctors_aux
)
561 DEFINE_DUMMY_FUNCTION (__do_global_dtors
)
562 /* GNU/Linux has a bug in its library; avoid an error. */
564 char * __CTOR_LIST__
[2] EXTERNALLY_VISIBLE
= { (char *) (-1), 0 };
566 char * __DTOR_LIST__
[2] EXTERNALLY_VISIBLE
= { (char *) (-1), 0 };
567 #endif /* GCC_CTORS_IN_LIBC */
568 DEFINE_DUMMY_FUNCTION (__main
)
569 #endif /* __GNUC__ */
570 #endif /* ORDINARY_LINK */
572 /* Test whether the next argument in ARGV matches SSTR or a prefix of
573 LSTR (at least MINLEN characters). If so, then if VALPTR is non-null
574 (the argument is supposed to have a value) store in *VALPTR either
575 the next argument or the portion of this one after the equal sign.
576 ARGV is read starting at position *SKIPPTR; this index is advanced
577 by the number of arguments used.
579 Too bad we can't just use getopt for all of this, but we don't have
580 enough information to do it right. */
583 argmatch (char **argv
, int argc
, const char *sstr
, const char *lstr
,
584 int minlen
, char **valptr
, int *skipptr
)
590 /* Don't access argv[argc]; give up in advance. */
591 if (argc
<= *skipptr
+ 1)
594 arg
= argv
[*skipptr
+1];
597 if (strcmp (arg
, sstr
) == 0)
601 *valptr
= argv
[*skipptr
+2];
608 arglen
= (valptr
!= NULL
&& (p
= strchr (arg
, '=')) != NULL
609 ? p
- arg
: strlen (arg
));
610 if (lstr
== 0 || arglen
< minlen
|| strncmp (arg
, lstr
, arglen
) != 0)
612 else if (valptr
== NULL
)
623 else if (argv
[*skipptr
+2] != NULL
)
625 *valptr
= argv
[*skipptr
+2];
635 #ifdef DOUG_LEA_MALLOC
637 /* malloc can be invoked even before main (e.g. by the dynamic
638 linker), so the dumped malloc state must be restored as early as
639 possible using this special hook. */
642 malloc_initialize_hook (void)
645 extern char **environ
;
650 if (!malloc_using_checking
)
651 /* Work around a bug in glibc's malloc. MALLOC_CHECK_ must be
652 ignored if the heap to be restored was constructed without
653 malloc checking. Can't use unsetenv, since that calls malloc. */
657 for (p
= environ
; p
&& *p
; p
++)
658 if (strncmp (*p
, "MALLOC_CHECK_=", 14) == 0)
667 malloc_set_state (malloc_state_ptr
);
668 #ifndef XMALLOC_OVERRUN_CHECK
669 free (malloc_state_ptr
);
674 if (my_heap_start
== 0)
675 my_heap_start
= sbrk (0);
676 malloc_using_checking
= getenv ("MALLOC_CHECK_") != NULL
;
680 void (*__malloc_initialize_hook
) (void) = malloc_initialize_hook
;
682 #endif /* DOUG_LEA_MALLOC */
687 main (int argc
, char **argv
)
692 char stack_bottom_variable
;
693 int do_initial_setlocale
;
695 #ifdef HAVE_SETRLIMIT
710 #if defined (USE_GTK) && defined (G_SLICE_ALWAYS_MALLOC)
711 /* This is used by the Cygwin build. */
712 setenv ("G_SLICE", "always-malloc", 1);
717 extern char my_endbss
[];
718 extern char *my_endbss_static
;
720 if (my_heap_start
== 0)
721 my_heap_start
= sbrk (0);
723 heap_bss_diff
= (char *)my_heap_start
- max (my_endbss
, my_endbss_static
);
726 #ifdef RUN_TIME_REMAP
728 run_time_remap (argv
[0]);
731 /* If using unexmacosx.c (set by s/darwin.h), we must do this. */
734 unexec_init_emacs_zone ();
737 sort_args (argc
, argv
);
739 while (argv
[argc
]) argc
++;
741 if (argmatch (argv
, argc
, "-version", "--version", 3, NULL
, &skip_args
))
743 const char *version
, *copyright
;
746 Lisp_Object tem
, tem2
;
747 tem
= Fsymbol_value (intern_c_string ("emacs-version"));
748 tem2
= Fsymbol_value (intern_c_string ("emacs-copyright"));
751 fprintf (stderr
, "Invalid value of `emacs-version'\n");
756 fprintf (stderr
, "Invalid value of `emacs-copyright'\n");
761 version
= SSDATA (tem
);
762 copyright
= SSDATA (tem2
);
767 version
= emacs_version
;
768 copyright
= emacs_copyright
;
770 printf ("GNU Emacs %s\n", version
);
771 printf ("%s\n", copyright
);
772 printf ("GNU Emacs comes with ABSOLUTELY NO WARRANTY.\n");
773 printf ("You may redistribute copies of Emacs\n");
774 printf ("under the terms of the GNU General Public License.\n");
775 printf ("For more information about these matters, ");
776 printf ("see the file named COPYING.\n");
780 if (argmatch (argv
, argc
, "-chdir", "--chdir", 4, &ch_to_dir
, &skip_args
))
781 if (chdir (ch_to_dir
) == -1)
783 fprintf (stderr
, "%s: Can't chdir to %s: %s\n",
784 argv
[0], ch_to_dir
, strerror (errno
));
789 #ifdef HAVE_PERSONALITY_LINUX32
791 && (strcmp (argv
[argc
-1], "dump") == 0
792 || strcmp (argv
[argc
-1], "bootstrap") == 0)
793 && ! getenv ("EMACS_HEAP_EXEC"))
795 static char heapexec
[] = "EMACS_HEAP_EXEC=true";
796 /* Set this so we only do this once. */
799 /* A flag to turn off address randomization which is introduced
800 in linux kernel shipped with fedora core 4 */
801 #define ADD_NO_RANDOMIZE 0x0040000
802 personality (PER_LINUX32
| ADD_NO_RANDOMIZE
);
803 #undef ADD_NO_RANDOMIZE
805 execvp (argv
[0], argv
);
807 /* If the exec fails, try to dump anyway. */
810 #endif /* HAVE_PERSONALITY_LINUX32 */
812 #if defined (HAVE_SETRLIMIT) && defined (RLIMIT_STACK)
813 /* Extend the stack space available.
814 Don't do that if dumping, since some systems (e.g. DJGPP)
815 might define a smaller stack limit at that time. */
818 && (!noninteractive
|| initialized
)
820 && !getrlimit (RLIMIT_STACK
, &rlim
))
823 extern size_t re_max_failures
;
824 /* Approximate the amount regex.c needs per unit of re_max_failures. */
825 int ratio
= 20 * sizeof (char *);
826 /* Then add 33% to cover the size of the smaller stacks that regex.c
827 successively allocates and discards, on its way to the maximum. */
829 /* Add in some extra to cover
830 what we're likely to use for other reasons. */
831 newlim
= re_max_failures
* ratio
+ 200000;
833 /* NetBSD (at least NetBSD 1.2G and former) has a bug in its
834 stack allocation routine for new process that the allocation
835 fails if stack limit is not on page boundary. So, round up the
836 new limit to page boundary. */
837 newlim
= (newlim
+ getpagesize () - 1) / getpagesize () * getpagesize();
839 if (newlim
> rlim
.rlim_max
)
841 newlim
= rlim
.rlim_max
;
842 /* Don't let regex.c overflow the stack we have. */
843 re_max_failures
= (newlim
- 200000) / ratio
;
845 if (rlim
.rlim_cur
< newlim
)
846 rlim
.rlim_cur
= newlim
;
848 setrlimit (RLIMIT_STACK
, &rlim
);
850 #endif /* HAVE_SETRLIMIT and RLIMIT_STACK */
852 /* Record (approximately) where the stack begins. */
853 stack_bottom
= &stack_bottom_variable
;
857 #ifndef SYSTEM_MALLOC
858 /* Arrange to get warning messages as memory fills up. */
859 memory_warnings (0, malloc_warning
);
861 /* Call malloc at least once, to run the initial __malloc_hook.
862 Also call realloc and free for consistency. */
863 free (realloc (malloc (4), 4));
866 /* Arrange to disable interrupt input inside malloc etc. */
867 uninterrupt_malloc ();
868 # endif /* not SYNC_INPUT */
869 #endif /* not SYSTEM_MALLOC */
871 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
872 main_thread
= pthread_self ();
873 #endif /* FORWARD_SIGNAL_TO_MAIN_THREAD */
875 #if defined (MSDOS) || defined (WINDOWSNT)
876 /* We do all file input/output as binary files. When we need to translate
877 newlines, we do that manually. */
879 #endif /* MSDOS || WINDOWSNT */
882 if (!isatty (fileno (stdin
)))
883 setmode (fileno (stdin
), O_BINARY
);
884 if (!isatty (fileno (stdout
)))
887 setmode (fileno (stdout
), O_BINARY
);
891 /* Skip initial setlocale if LC_ALL is "C", as it's not needed in that case.
892 The build procedure uses this while dumping, to ensure that the
893 dumped Emacs does not have its system locale tables initialized,
894 as that might cause screwups when the dumped Emacs starts up. */
896 char *lc_all
= getenv ("LC_ALL");
897 do_initial_setlocale
= ! lc_all
|| strcmp (lc_all
, "C");
900 /* Set locale now, so that initial error messages are localized properly.
901 fixup_locale must wait until later, since it builds strings. */
902 if (do_initial_setlocale
)
903 setlocale (LC_ALL
, "");
905 inhibit_window_system
= 0;
907 /* Handle the -t switch, which specifies filename to use as terminal. */
911 if (argmatch (argv
, argc
, "-t", "--terminal", 4, &term
, &skip_args
))
916 result
= emacs_open (term
, O_RDWR
, 0);
917 if (result
< 0 || dup (0) < 0)
919 char *errstring
= strerror (errno
);
920 fprintf (stderr
, "%s: %s: %s\n", argv
[0], term
, errstring
);
925 fprintf (stderr
, "%s: %s: not a tty\n", argv
[0], term
);
928 fprintf (stderr
, "Using %s\n", term
);
929 #ifdef HAVE_WINDOW_SYSTEM
930 inhibit_window_system
= 1; /* -t => -nw */
937 /* Command line option --no-windows is deprecated and thus not mentioned
938 in the manual and usage informations. */
939 if (argmatch (argv
, argc
, "-nw", "--no-window-system", 6, NULL
, &skip_args
)
940 || argmatch (argv
, argc
, "-nw", "--no-windows", 6, NULL
, &skip_args
))
941 inhibit_window_system
= 1;
943 /* Handle the -batch switch, which means don't do interactive display. */
945 if (argmatch (argv
, argc
, "-batch", "--batch", 5, NULL
, &skip_args
))
948 Vundo_outer_limit
= Qnil
;
950 if (argmatch (argv
, argc
, "-script", "--script", 3, &junk
, &skip_args
))
952 noninteractive
= 1; /* Set batch mode. */
953 /* Convert --script to -scriptload, un-skip it, and sort again
954 so that it will be handled in proper sequence. */
955 /* FIXME broken for --script=FILE - is that supposed to work? */
956 argv
[skip_args
- 1] = (char *) "-scriptload";
958 sort_args (argc
, argv
);
961 /* Handle the --help option, which gives a usage message. */
962 if (argmatch (argv
, argc
, "-help", "--help", 3, NULL
, &skip_args
))
964 printf (USAGE1
, argv
[0], USAGE2
);
970 if (argmatch (argv
, argc
, "-daemon", "--daemon", 5, NULL
, &skip_args
)
971 || argmatch (argv
, argc
, "-daemon", "--daemon", 5, &dname_arg
, &skip_args
))
976 /* Start as a daemon: fork a new child process which will run the
977 rest of the initialization code, then exit.
979 Detaching a daemon requires the following steps:
983 - close the tty file-descriptors
985 We only want to do the last 2 steps once the daemon is ready to
986 serve requests, i.e. after loading .emacs (initialization).
987 OTOH initialization may start subprocesses (e.g. ispell) and these
988 should be run from the proper process (the one that will end up
989 running as daemon) and with the proper "session id" in order for
990 them to keep working after detaching, so fork and setsid need to be
991 performed before initialization.
993 We want to avoid exiting before the server socket is ready, so
994 use a pipe for synchronization. The parent waits for the child
995 to close its end of the pipe (using `daemon-initialized')
997 if (pipe (daemon_pipe
) == -1)
999 fprintf (stderr
, "Cannot pipe!\n");
1003 #ifndef NS_IMPL_COCOA
1005 #else /* NS_IMPL_COCOA */
1006 /* Under Cocoa we must do fork+exec as CoreFoundation lib fails in
1007 forked process: http://developer.apple.com/ReleaseNotes/
1008 CoreFoundation/CoreFoundation.html)
1009 We mark being in the exec'd process by a daemon name argument of
1010 form "--daemon=\nFD0,FD1\nNAME" where FD are the pipe file descriptors,
1011 NAME is the original daemon name, if any. */
1012 if (!dname_arg
|| !strchr (dname_arg
, '\n'))
1013 f
= fork (); /* in orig */
1015 f
= 0; /* in exec'd */
1016 #endif /* NS_IMPL_COCOA */
1022 /* Close unused writing end of the pipe. */
1023 close (daemon_pipe
[1]);
1025 /* Just wait for the child to close its end of the pipe. */
1028 retval
= read (daemon_pipe
[0], &buf
, 1);
1030 while (retval
== -1 && errno
== EINTR
);
1034 fprintf (stderr
, "Error reading status from child\n");
1037 else if (retval
== 0)
1039 fprintf (stderr
, "Error: server did not start correctly\n");
1043 close (daemon_pipe
[0]);
1048 fprintf (stderr
, "Cannot fork!\n");
1052 #ifdef NS_IMPL_COCOA
1054 /* In orig process, forked as child, OR in exec'd. */
1055 if (!dname_arg
|| !strchr (dname_arg
, '\n'))
1056 { /* In orig, child: now exec w/special daemon name. */
1059 if (dname_arg
&& strlen (dname_arg
) > 70)
1061 fprintf (stderr
, "daemon: child name too long\n");
1065 sprintf (fdStr
, "--daemon=\n%d,%d\n%s", daemon_pipe
[0],
1066 daemon_pipe
[1], dname_arg
? dname_arg
: "");
1067 argv
[skip_args
] = fdStr
;
1069 execv (argv
[0], argv
);
1070 fprintf (stderr
, "emacs daemon: exec failed: %d\n", errno
);
1074 /* In exec'd: parse special dname into pipe and name info. */
1075 if (!dname_arg
|| !strchr (dname_arg
, '\n')
1076 || strlen (dname_arg
) < 1 || strlen (dname_arg
) > 70)
1078 fprintf (stderr
, "emacs daemon: daemon name absent or too long\n");
1081 dname_arg2
[0] = '\0';
1082 sscanf (dname_arg
, "\n%d,%d\n%s", &(daemon_pipe
[0]), &(daemon_pipe
[1]),
1084 dname_arg
= strlen (dname_arg2
) ? dname_arg2
: NULL
;
1086 #endif /* NS_IMPL_COCOA */
1089 daemon_name
= xstrdup (dname_arg
);
1090 /* Close unused reading end of the pipe. */
1091 close (daemon_pipe
[0]);
1092 /* Make sure that the used end of the pipe is closed on exec, so
1093 that it is not accessible to programs started from .emacs. */
1094 fcntl (daemon_pipe
[1], F_SETFD
, FD_CLOEXEC
);
1100 fprintf (stderr
, "This platform does not support the -daemon flag.\n");
1105 if (! noninteractive
)
1107 #if defined (USG5) && defined (INTERRUPT_INPUT)
1110 #if defined (HAVE_GTK_AND_PTHREAD) && !defined (SYSTEM_MALLOC) && !defined (DOUG_LEA_MALLOC)
1112 extern void malloc_enable_thread (void);
1114 malloc_enable_thread ();
1121 /* Don't catch SIGHUP if dumping. */
1128 sigblock (sigmask (SIGHUP
));
1129 /* In --batch mode, don't catch SIGHUP if already ignored.
1130 That makes nohup work. */
1131 if (! noninteractive
1132 || signal (SIGHUP
, SIG_IGN
) != SIG_IGN
)
1133 signal (SIGHUP
, fatal_error_signal
);
1134 sigunblock (sigmask (SIGHUP
));
1139 ! noninteractive
|| initialized
1145 /* Don't catch these signals in batch mode if dumping.
1146 On some machines, this sets static data that would make
1147 signal fail to work right when the dumped Emacs is run. */
1148 signal (SIGQUIT
, fatal_error_signal
);
1149 signal (SIGILL
, fatal_error_signal
);
1150 signal (SIGTRAP
, fatal_error_signal
);
1152 add_user_signal (SIGUSR1
, "sigusr1");
1155 add_user_signal (SIGUSR2
, "sigusr2");
1158 signal (SIGABRT
, fatal_error_signal
);
1161 signal (SIGHWE
, fatal_error_signal
);
1164 signal (SIGPRE
, fatal_error_signal
);
1167 signal (SIGORE
, fatal_error_signal
);
1170 signal (SIGUME
, fatal_error_signal
);
1173 signal (SIGDLK
, fatal_error_signal
);
1176 signal (SIGCPULIM
, fatal_error_signal
);
1179 /* This is missing on some systems - OS/2, for example. */
1180 signal (SIGIOT
, fatal_error_signal
);
1183 signal (SIGEMT
, fatal_error_signal
);
1185 signal (SIGFPE
, fatal_error_signal
);
1187 signal (SIGBUS
, fatal_error_signal
);
1189 signal (SIGSEGV
, fatal_error_signal
);
1191 signal (SIGSYS
, fatal_error_signal
);
1193 /* May need special treatment on MS-Windows. See
1194 http://lists.gnu.org/archive/html/emacs-devel/2010-09/msg01062.html
1195 Please update the doc of kill-emacs, kill-emacs-hook, and
1196 NEWS if you change this.
1198 if (noninteractive
) signal (SIGINT
, fatal_error_signal
);
1199 signal (SIGTERM
, fatal_error_signal
);
1201 signal (SIGXCPU
, fatal_error_signal
);
1204 signal (SIGXFSZ
, fatal_error_signal
);
1205 #endif /* SIGXFSZ */
1208 /* This just means available memory is getting low. */
1209 signal (SIGDANGER
, memory_warning_signal
);
1213 /* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU. */
1214 signal (SIGXCPU
, fatal_error_signal
);
1215 signal (SIGIOINT
, fatal_error_signal
);
1216 signal (SIGGRANT
, fatal_error_signal
);
1217 signal (SIGRETRACT
, fatal_error_signal
);
1218 signal (SIGSOUND
, fatal_error_signal
);
1219 signal (SIGMSG
, fatal_error_signal
);
1223 noninteractive1
= noninteractive
;
1225 /* Perform basic initializations (not merely interning symbols). */
1232 init_character_once ();
1233 init_charset_once ();
1234 init_coding_once ();
1235 init_syntax_once (); /* Create standard syntax table. */
1236 init_category_once (); /* Create standard category table. */
1237 /* Must be done before init_buffer. */
1238 init_casetab_once ();
1239 init_buffer_once (); /* Create buffer table and some buffers. */
1240 init_minibuf_once (); /* Create list of minibuffers. */
1241 /* Must precede init_window_once. */
1243 /* Call syms_of_xfaces before init_window_once because that
1244 function creates Vterminal_frame. Termcap frames now use
1245 faces, and the face implementation uses some symbols as
1248 /* XXX syms_of_keyboard uses some symbols in keymap.c. It would
1249 be better to arrange things not to have this dependency. */
1251 /* Call syms_of_keyboard before init_window_once because
1252 keyboard sets up symbols that include some face names that
1253 the X support will want to use. This can happen when
1254 CANNOT_DUMP is defined. */
1255 syms_of_keyboard ();
1257 /* Called before syms_of_fileio, because it sets up Qerror_condition. */
1260 /* Before syms_of_coding to initialize Vgc_cons_threshold. */
1262 /* Before syms_of_coding because it initializes Qcharsetp. */
1264 /* Before init_window_once, because it sets up the
1265 Vcoding_system_hash_table. */
1266 syms_of_coding (); /* This should be after syms_of_fileio. */
1268 init_window_once (); /* Init the window system. */
1269 #ifdef HAVE_WINDOW_SYSTEM
1270 init_fringe_once (); /* Swap bitmaps if necessary. */
1271 #endif /* HAVE_WINDOW_SYSTEM */
1276 if (do_initial_setlocale
)
1279 Vsystem_messages_locale
= Vprevious_system_messages_locale
;
1280 Vsystem_time_locale
= Vprevious_system_time_locale
;
1285 #ifdef CLASH_DETECTION
1289 running_asynch_code
= 0;
1292 = argmatch (argv
, argc
, "-nl", "--no-loadup", 6, NULL
, &skip_args
);
1295 = argmatch (argv
, argc
, "-nsl", "--no-site-lisp", 11, NULL
, &skip_args
);
1298 ns_alloc_autorelease_pool();
1299 if (!noninteractive
)
1301 #ifdef NS_IMPL_COCOA
1302 if (skip_args
< argc
)
1304 /* FIXME: Do the right thing if getenv returns NULL, or if
1306 if (!strncmp(argv
[skip_args
], "-psn", 4))
1309 chdir (getenv ("HOME"));
1311 else if (skip_args
+1 < argc
&& !strncmp(argv
[skip_args
+1], "-psn", 4))
1314 chdir (getenv ("HOME"));
1319 #endif /* HAVE_NS */
1321 #ifdef HAVE_X_WINDOWS
1322 /* Stupid kludge to catch command-line display spec. We can't
1323 handle this argument entirely in window system dependent code
1324 because we don't even know which window system dependent code
1325 to run until we've recognized this argument. */
1327 char *displayname
= 0;
1328 int count_before
= skip_args
;
1330 /* Skip any number of -d options, but only use the last one. */
1333 int count_before_this
= skip_args
;
1335 if (argmatch (argv
, argc
, "-d", "--display", 3, &displayname
, &skip_args
))
1337 else if (argmatch (argv
, argc
, "-display", 0, 3, &displayname
, &skip_args
))
1342 count_before
= count_before_this
;
1345 /* If we have the form --display=NAME,
1346 convert it into -d name.
1347 This requires inserting a new element into argv. */
1348 if (displayname
!= 0 && skip_args
- count_before
== 1)
1350 char **new = (char **) xmalloc (sizeof (char *) * (argc
+ 2));
1353 for (j
= 0; j
< count_before
+ 1; j
++)
1355 new[count_before
+ 1] = (char *) "-d";
1356 new[count_before
+ 2] = displayname
;
1357 for (j
= count_before
+ 2; j
<argc
; j
++)
1358 new[j
+ 1] = argv
[j
];
1362 /* Change --display to -d, when its arg is separate. */
1363 else if (displayname
!= 0 && skip_args
> count_before
1364 && argv
[count_before
+ 1][1] == '-')
1365 argv
[count_before
+ 1] = (char *) "-d";
1369 if (argmatch (argv
, argc
, "-Q", "--quick", 3, NULL
, &skip_args
)
1370 || argmatch (argv
, argc
, "-quick", 0, 2, NULL
, &skip_args
))
1374 /* Don't actually discard this arg. */
1375 skip_args
= count_before
;
1377 #else /* !HAVE_X_WINDOWS */
1380 int count_before
= skip_args
;
1382 if (argmatch (argv
, argc
, "-Q", "--quick", 3, NULL
, &skip_args
)
1383 || argmatch (argv
, argc
, "-quick", 0, 2, NULL
, &skip_args
))
1386 skip_args
= count_before
;
1390 /* argmatch must not be used after here,
1391 except when bulding temacs
1392 because the -d argument has not been skipped in skip_args. */
1395 /* Call early 'cause init_environment needs it. */
1397 /* Set defaults for several environment variables. */
1399 init_environment (argc
, argv
, skip_args
);
1406 /* Initialize environment from registry settings. */
1407 init_environment (argv
);
1408 init_ntproc (); /* must precede init_editfns. */
1418 /* Initialize and GC-protect Vinitial_environment and
1419 Vprocess_environment before set_initial_environment fills them
1422 syms_of_callproc ();
1423 /* egetenv is a pretty low-level facility, which may get called in
1424 many circumstances; it seems flimsy to put off initializing it
1425 until calling init_callproc. */
1426 set_initial_environment ();
1427 /* AIX crashes are reported in system versions 3.2.3 and 3.2.4
1428 if this is not done. Do it after set_global_environment so that we
1429 don't pollute Vglobal_environment. */
1430 /* Setting LANG here will defeat the startup locale processing... */
1435 init_buffer (); /* Init default directory of main buffer. */
1437 init_callproc_1 (); /* Must precede init_cmdargs and init_sys_modes. */
1438 init_cmdargs (argc
, argv
, skip_args
); /* Must precede init_lread. */
1442 /* Erase any pre-dump messages in the message log, to avoid confusion. */
1443 Lisp_Object old_log_max
;
1444 old_log_max
= Vmessage_log_max
;
1445 XSETFASTINT (Vmessage_log_max
, 0);
1446 message_dolog ("", 0, 1, 0);
1447 Vmessage_log_max
= old_log_max
;
1450 init_callproc (); /* Must follow init_cmdargs but not init_sys_modes. */
1453 /* Intern the names of all standard functions and variables;
1454 define standard keys. */
1458 /* The basic levels of Lisp must come first. Note that
1459 syms_of_data and some others have already been called. */
1465 syms_of_floatfns ();
1468 syms_of_bytecode ();
1470 syms_of_casefiddle ();
1472 syms_of_category ();
1474 syms_of_character ();
1481 syms_of_filelock ();
1484 /* syms_of_keymap (); */
1492 syms_of_terminal ();
1498 syms_of_textprop ();
1499 syms_of_composite ();
1502 #endif /* WINDOWSNT */
1506 #ifdef HAVE_WINDOW_SYSTEM
1509 #endif /* HAVE_WINDOW_SYSTEM */
1510 #ifdef HAVE_X_WINDOWS
1515 syms_of_xsettings ();
1522 #endif /* HAVE_X_WINDOWS */
1533 syms_of_w32select ();
1536 #endif /* HAVE_NTGUI */
1542 syms_of_win16select();
1549 syms_of_nsselect ();
1551 #endif /* HAVE_NS */
1558 syms_of_dbusbind ();
1559 #endif /* HAVE_DBUS */
1563 #endif /* WINDOWSNT */
1565 keys_of_casefiddle ();
1568 keys_of_keyboard ();
1574 /* Initialization that must be done even if the global variable
1575 initialized is non zero. */
1577 globals_of_w32fns ();
1578 globals_of_w32menu ();
1579 globals_of_w32select ();
1580 #endif /* HAVE_NTGUI */
1585 init_editfns (); /* init_process uses Voperating_system_release. */
1586 init_process (); /* init_display uses add_keyboard_wait_descriptor. */
1587 init_keyboard (); /* This too must precede init_sys_modes. */
1588 if (!noninteractive
)
1589 init_display (); /* Determine terminal type. Calls init_sys_modes. */
1592 #ifdef HAVE_WINDOW_SYSTEM
1595 #endif /* HAVE_WINDOW_SYSTEM */
1607 /* Handle -l loadup, args passed by Makefile. */
1608 if (argmatch (argv
, argc
, "-l", "--load", 3, &file
, &skip_args
))
1609 Vtop_level
= Fcons (intern_c_string ("load"),
1610 Fcons (build_string (file
), Qnil
));
1611 /* Unless next switch is -nl, load "loadup.el" first thing. */
1613 Vtop_level
= Fcons (intern_c_string ("load"),
1614 Fcons (build_string ("loadup.el"), Qnil
));
1621 /* If the execution TZ happens to be the same as the dump TZ,
1622 change it to some other value and then change it back,
1623 to force the underlying implementation to reload the TZ info.
1624 This is needed on implementations that load TZ info from files,
1625 since the TZ file contents may differ between dump and execution. */
1626 char *tz
= getenv ("TZ");
1627 if (tz
&& !strcmp (tz
, dump_tz
))
1637 /* Set up for profiling. This is known to work on FreeBSD,
1638 GNU/Linux and MinGW. It might work on some other systems too.
1639 Give it a try and tell us if it works on your system. To compile
1640 for profiling, use the configure option --enable-profiling. */
1641 #if defined (__FreeBSD__) || defined (GNU_LINUX) || defined(__MINGW32__)
1645 extern void _mcleanup ();
1647 extern unsigned char etext
asm ("etext");
1651 #ifdef HAVE___EXECUTABLE_START
1652 /* This symbol is defined by GNU ld to the start of the text
1654 extern char __executable_start
[];
1656 extern void safe_bcopy ();
1660 #ifdef HAVE___EXECUTABLE_START
1661 monstartup (__executable_start
, &etext
);
1663 /* This uses safe_bcopy because that function comes first in the
1664 Emacs executable. It might be better to use something that
1665 gives the start of the text segment, but start_of_text is not
1666 defined on all systems now. */
1667 /* FIXME: Does not work on architectures with function
1669 monstartup (safe_bcopy
, &etext
);
1679 #ifdef LOCALTIME_CACHE
1680 /* Some versions of localtime have a bug. They cache the value of the time
1681 zone rather than looking it up every time. Since localtime() is
1682 called to bolt the undumping time into the undumped emacs, this
1683 results in localtime ignoring the TZ environment variable.
1684 This flushes the new TZ value into localtime. */
1686 #endif /* defined (LOCALTIME_CACHE) */
1688 /* Enter editor command loop. This never returns. */
1694 /* Sort the args so we can find the most important ones
1695 at the beginning of argv. */
1697 /* First, here's a table of all the standard options. */
1699 struct standard_args
1702 const char *longname
;
1707 static const struct standard_args standard_args
[] =
1709 { "-version", "--version", 150, 0 },
1710 { "-chdir", "--chdir", 130, 1 },
1711 { "-t", "--terminal", 120, 1 },
1712 { "-nw", "--no-window-system", 110, 0 },
1713 { "-nw", "--no-windows", 110, 0 },
1714 { "-batch", "--batch", 100, 0 },
1715 { "-script", "--script", 100, 1 },
1716 { "-daemon", "--daemon", 99, 0 },
1717 { "-help", "--help", 90, 0 },
1718 { "-nl", "--no-loadup", 70, 0 },
1719 { "-nsl", "--no-site-lisp", 65, 0 },
1720 /* -d must come last before the options handled in startup.el. */
1721 { "-d", "--display", 60, 1 },
1722 { "-display", 0, 60, 1 },
1723 /* Now for the options handled in `command-line' (startup.el). */
1724 /* (Note that to imply -nsl, -Q is partially handled here.) */
1725 { "-Q", "--quick", 55, 0 },
1726 { "-quick", 0, 55, 0 },
1727 { "-q", "--no-init-file", 50, 0 },
1728 { "-no-init-file", 0, 50, 0 },
1729 { "-no-site-file", "--no-site-file", 40, 0 },
1730 { "-u", "--user", 30, 1 },
1731 { "-user", 0, 30, 1 },
1732 { "-debug-init", "--debug-init", 20, 0 },
1733 { "-iconic", "--iconic", 15, 0 },
1734 { "-D", "--basic-display", 12, 0},
1735 { "-basic-display", 0, 12, 0},
1736 { "-nbc", "--no-blinking-cursor", 12, 0 },
1737 /* Now for the options handled in `command-line-1' (startup.el). */
1738 { "-nbi", "--no-bitmap-icon", 10, 0 },
1739 { "-bg", "--background-color", 10, 1 },
1740 { "-background", 0, 10, 1 },
1741 { "-fg", "--foreground-color", 10, 1 },
1742 { "-foreground", 0, 10, 1 },
1743 { "-bd", "--border-color", 10, 1 },
1744 { "-bw", "--border-width", 10, 1 },
1745 { "-ib", "--internal-border", 10, 1 },
1746 { "-ms", "--mouse-color", 10, 1 },
1747 { "-cr", "--cursor-color", 10, 1 },
1748 { "-fn", "--font", 10, 1 },
1749 { "-font", 0, 10, 1 },
1750 { "-fs", "--fullscreen", 10, 0 },
1751 { "-fw", "--fullwidth", 10, 0 },
1752 { "-fh", "--fullheight", 10, 0 },
1753 { "-mm", "--maximized", 10, 0 },
1754 { "-g", "--geometry", 10, 1 },
1755 { "-geometry", 0, 10, 1 },
1756 { "-T", "--title", 10, 1 },
1757 { "-title", 0, 10, 1 },
1758 { "-name", "--name", 10, 1 },
1759 { "-xrm", "--xrm", 10, 1 },
1760 { "-parent-id", "--parent-id", 10, 1 },
1761 { "-r", "--reverse-video", 5, 0 },
1763 { "-reverse", 0, 5, 0 },
1764 { "-hb", "--horizontal-scroll-bars", 5, 0 },
1765 { "-vb", "--vertical-scroll-bars", 5, 0 },
1766 { "-color", "--color", 5, 0},
1767 { "-no-splash", "--no-splash", 3, 0 },
1768 { "-no-desktop", "--no-desktop", 3, 0 },
1770 { "-NSAutoLaunch", 0, 5, 1 },
1771 { "-NXAutoLaunch", 0, 5, 1 },
1772 { "-disable-font-backend", "--disable-font-backend", 65, 0 },
1773 { "-_NSMachLaunch", 0, 85, 1 },
1774 { "-MachLaunch", 0, 85, 1 },
1775 { "-macosx", 0, 85, 0 },
1776 { "-NSHost", 0, 85, 1 },
1778 /* These have the same priority as ordinary file name args,
1779 so they are not reordered with respect to those. */
1780 { "-L", "--directory", 0, 1 },
1781 { "-directory", 0, 0, 1 },
1782 { "-l", "--load", 0, 1 },
1783 { "-load", 0, 0, 1 },
1784 /* This has no longname, because using --scriptload confuses sort_args,
1785 because then the --script long option seems to match twice; ie
1786 you can't have a long option which is a prefix of another long
1787 option. In any case, this is entirely an internal option. */
1788 { "-scriptload", NULL
, 0, 1 },
1789 { "-f", "--funcall", 0, 1 },
1790 { "-funcall", 0, 0, 1 },
1791 { "-eval", "--eval", 0, 1 },
1792 { "-execute", "--execute", 0, 1 },
1793 { "-find-file", "--find-file", 0, 1 },
1794 { "-visit", "--visit", 0, 1 },
1795 { "-file", "--file", 0, 1 },
1796 { "-insert", "--insert", 0, 1 },
1798 { "-NXOpen", 0, 0, 1 },
1799 { "-NXOpenTemp", 0, 0, 1 },
1800 { "-NSOpen", 0, 0, 1 },
1801 { "-NSOpenTemp", 0, 0, 1 },
1802 { "-GSFilePath", 0, 0, 1 },
1804 /* This should be processed after ordinary file name args and the like. */
1805 { "-kill", "--kill", -10, 0 },
1808 /* Reorder the elements of ARGV (assumed to have ARGC elements)
1809 so that the highest priority ones come first.
1810 Do not change the order of elements of equal priority.
1811 If an option takes an argument, keep it and its argument together.
1813 If an option that takes no argument appears more
1814 than once, eliminate all but one copy of it. */
1817 sort_args (int argc
, char **argv
)
1819 char **new = (char **) xmalloc (sizeof (char *) * argc
);
1820 /* For each element of argv,
1821 the corresponding element of options is:
1822 0 for an option that takes no arguments,
1823 1 for an option that takes one argument, etc.
1824 -1 for an ordinary non-option argument. */
1825 int *options
= (int *) xmalloc (sizeof (int) * argc
);
1826 int *priority
= (int *) xmalloc (sizeof (int) * argc
);
1828 int incoming_used
= 1;
1832 /* Categorize all the options,
1833 and figure out which argv elts are option arguments. */
1834 for (from
= 1; from
< argc
; from
++)
1838 if (argv
[from
][0] == '-')
1843 /* If we have found "--", don't consider
1844 any more arguments as options. */
1845 if (argv
[from
][1] == '-' && argv
[from
][2] == 0)
1847 /* Leave the "--", and everything following it, at the end. */
1848 for (; from
< argc
; from
++)
1850 priority
[from
] = -100;
1856 /* Look for a match with a known old-fashioned option. */
1857 for (i
= 0; i
< sizeof (standard_args
) / sizeof (standard_args
[0]); i
++)
1858 if (!strcmp (argv
[from
], standard_args
[i
].name
))
1860 options
[from
] = standard_args
[i
].nargs
;
1861 priority
[from
] = standard_args
[i
].priority
;
1862 if (from
+ standard_args
[i
].nargs
>= argc
)
1863 fatal ("Option `%s' requires an argument\n", argv
[from
]);
1864 from
+= standard_args
[i
].nargs
;
1868 /* Look for a match with a known long option.
1869 MATCH is -1 if no match so far, -2 if two or more matches so far,
1870 >= 0 (the table index of the match) if just one match so far. */
1871 if (argv
[from
][1] == '-')
1874 thislen
= strlen (argv
[from
]);
1875 equals
= strchr (argv
[from
], '=');
1877 thislen
= equals
- argv
[from
];
1880 i
< sizeof (standard_args
) / sizeof (standard_args
[0]); i
++)
1881 if (standard_args
[i
].longname
1882 && !strncmp (argv
[from
], standard_args
[i
].longname
,
1891 /* If we found exactly one match, use that. */
1894 options
[from
] = standard_args
[match
].nargs
;
1895 priority
[from
] = standard_args
[match
].priority
;
1896 /* If --OPTION=VALUE syntax is used,
1897 this option uses just one argv element. */
1900 if (from
+ options
[from
] >= argc
)
1901 fatal ("Option `%s' requires an argument\n", argv
[from
]);
1902 from
+= options
[from
];
1904 /* FIXME When match < 0, shouldn't there be some error,
1905 or at least indication to the user that there was a
1912 /* Copy the arguments, in order of decreasing priority, to NEW. */
1914 while (incoming_used
< argc
)
1917 int best_priority
= -9999;
1919 /* Find the highest priority remaining option.
1920 If several have equal priority, take the first of them. */
1921 for (from
= 1; from
< argc
; from
++)
1923 if (argv
[from
] != 0 && priority
[from
] > best_priority
)
1925 best_priority
= priority
[from
];
1928 /* Skip option arguments--they are tied to the options. */
1929 if (options
[from
] > 0)
1930 from
+= options
[from
];
1936 /* Copy the highest priority remaining option, with its args, to NEW.
1937 Unless it is a duplicate of the previous one. */
1938 if (! (options
[best
] == 0
1939 && ! strcmp (new[to
- 1], argv
[best
])))
1941 new[to
++] = argv
[best
];
1942 for (i
= 0; i
< options
[best
]; i
++)
1943 new[to
++] = argv
[best
+ i
+ 1];
1946 incoming_used
+= 1 + (options
[best
] > 0 ? options
[best
] : 0);
1948 /* Clear out this option in ARGV. */
1950 for (i
= 0; i
< options
[best
]; i
++)
1951 argv
[best
+ i
+ 1] = 0;
1954 /* If duplicate options were deleted, fill up extra space with null ptrs. */
1958 memcpy (argv
, new, sizeof (char *) * argc
);
1965 DEFUE ("kill-emacs", Fkill_emacs
, Skill_emacs
, 0, 1, "P",
1966 doc
: /* Exit the Emacs job and kill it.
1967 If ARG is an integer, return ARG as the exit program code.
1968 If ARG is a string, stuff it as keyboard input.
1970 This function is called upon receipt of the signals SIGTERM
1971 or SIGHUP, and upon SIGINT in batch mode.
1973 The value of `kill-emacs-hook', if not void,
1974 is a list of functions (of no args),
1975 all of which are called before Emacs is actually killed. */)
1978 struct gcpro gcpro1
;
1986 hook
= intern ("kill-emacs-hook");
1987 Frun_hooks (1, &hook
);
1991 shut_down_emacs (0, 0, STRINGP (arg
) ? arg
: Qnil
);
1993 /* If we have an auto-save list file,
1994 kill it because we are exiting Emacs deliberately (not crashing).
1995 Do it after shut_down_emacs, which does an auto-save. */
1996 if (STRINGP (Vauto_save_list_file_name
))
1997 unlink (SSDATA (Vauto_save_list_file_name
));
1999 exit (INTEGERP (arg
) ? XINT (arg
) : EXIT_SUCCESS
);
2003 /* Perform an orderly shutdown of Emacs. Autosave any modified
2004 buffers, kill any child processes, clean up the terminal modes (if
2005 we're in the foreground), and other stuff like that. Don't perform
2006 any redisplay; this may be called when Emacs is shutting down in
2007 the background, or after its X connection has died.
2009 If SIG is a signal number, print a message for it.
2011 This is called by fatal signal handlers, X protocol error handlers,
2015 shut_down_emacs (int sig
, int no_x
, Lisp_Object stuff
)
2017 /* Prevent running of hooks from now on. */
2020 /* Don't update display from now on. */
2021 Vinhibit_redisplay
= Qt
;
2023 /* If we are controlling the terminal, reset terminal modes. */
2026 int pgrp
= EMACS_GETPGRP (0);
2027 int tpgrp
= tcgetpgrp (0);
2028 if ((tpgrp
!= -1) && tpgrp
== pgrp
)
2030 reset_all_sys_modes ();
2031 if (sig
&& sig
!= SIGTERM
)
2032 fprintf (stderr
, "Fatal error (%d)", sig
);
2037 reset_all_sys_modes ();
2040 stuff_buffered_input (stuff
);
2042 inhibit_sentinels
= 1;
2043 kill_buffer_processes (Qnil
);
2044 Fdo_auto_save (Qt
, Qnil
);
2046 #ifdef CLASH_DETECTION
2047 unlock_all_files ();
2050 #if 0 /* This triggers a bug in XCloseDisplay and is not needed. */
2051 #ifdef HAVE_X_WINDOWS
2052 /* It's not safe to call intern here. Maybe we are crashing. */
2053 if (!noninteractive
&& SYMBOLP (Vinitial_window_system
)
2054 && SCHARS (SYMBOL_NAME (Vinitial_window_system
)) == 1
2055 && SREF (SYMBOL_NAME (Vinitial_window_system
), 0) == 'x'
2057 Fx_close_current_connection ();
2058 #endif /* HAVE_X_WINDOWS */
2062 /* There is a tendency for a SIGIO signal to arrive within exit,
2063 and cause a SIGHUP because the input descriptor is already closed. */
2065 signal (SIGIO
, SIG_IGN
);
2072 /* Do this only if terminating normally, we want glyph matrices
2073 etc. in a core dump. */
2074 if (sig
== 0 || sig
== SIGTERM
)
2076 check_glyph_memory ();
2077 check_message_stack ();
2085 ns_term_shutdown (sig
);
2095 DEFUN ("dump-emacs", Fdump_emacs
, Sdump_emacs
, 2, 2, 0,
2096 doc
: /* Dump current state of Emacs into executable file FILENAME.
2097 Take symbols from SYMFILE (presumably the file you executed to run Emacs).
2098 This is used in the file `loadup.el' when building Emacs.
2100 You must run Emacs in batch mode in order to dump it. */)
2101 (Lisp_Object filename
, Lisp_Object symfile
)
2103 extern char my_edata
[];
2106 int count
= SPECPDL_INDEX ();
2110 if (! noninteractive
)
2111 error ("Dumping Emacs works only in batch mode");
2114 if (heap_bss_diff
> MAX_HEAP_BSS_DIFF
)
2116 fprintf (stderr
, "**************************************************\n");
2117 fprintf (stderr
, "Warning: Your system has a gap between BSS and the\n");
2118 fprintf (stderr
, "heap (%lu bytes). This usually means that exec-shield\n",
2120 fprintf (stderr
, "or something similar is in effect. The dump may\n");
2121 fprintf (stderr
, "fail because of this. See the section about\n");
2122 fprintf (stderr
, "exec-shield in etc/PROBLEMS for more information.\n");
2123 fprintf (stderr
, "**************************************************\n");
2125 #endif /* GNU_LINUX */
2127 /* Bind `command-line-processed' to nil before dumping,
2128 so that the dumped Emacs will process its command line
2129 and set up to work with X windows if appropriate. */
2130 symbol
= intern ("command-line-processed");
2131 specbind (symbol
, Qnil
);
2133 CHECK_STRING (filename
);
2134 filename
= Fexpand_file_name (filename
, Qnil
);
2135 if (!NILP (symfile
))
2137 CHECK_STRING (symfile
);
2138 if (SCHARS (symfile
))
2139 symfile
= Fexpand_file_name (symfile
, Qnil
);
2143 Vpurify_flag
= Qnil
;
2146 set_time_zone_rule (dump_tz
);
2147 #ifndef LOCALTIME_CACHE
2148 /* Force a tz reload, since set_time_zone_rule doesn't. */
2154 /* Tell malloc where start of impure now is. */
2155 /* Also arrange for warnings when nearly out of space. */
2156 #ifndef SYSTEM_MALLOC
2158 /* On Windows, this was done before dumping, and that once suffices.
2159 Meanwhile, my_edata is not valid on Windows. */
2160 memory_warnings (my_edata
, malloc_warning
);
2161 #endif /* not WINDOWSNT */
2162 #if defined (HAVE_GTK_AND_PTHREAD) && !defined SYNC_INPUT
2163 /* Pthread may call malloc before main, and then we will get an endless
2164 loop, because pthread_self (see alloc.c) calls malloc the first time
2165 it is called on some systems. */
2166 reset_malloc_hooks ();
2168 #endif /* not SYSTEM_MALLOC */
2169 #ifdef DOUG_LEA_MALLOC
2170 malloc_state_ptr
= malloc_get_state ();
2173 #ifdef USE_MMAP_FOR_BUFFERS
2176 unexec (SSDATA (filename
), !NILP (symfile
) ? SSDATA (symfile
) : 0);
2177 #ifdef USE_MMAP_FOR_BUFFERS
2180 #ifdef DOUG_LEA_MALLOC
2181 free (malloc_state_ptr
);
2186 return unbind_to (count
, Qnil
);
2189 #endif /* not CANNOT_DUMP */
2192 /* Recover from setlocale (LC_ALL, ""). */
2196 /* The Emacs Lisp reader needs LC_NUMERIC to be "C",
2197 so that numbers are read and printed properly for Emacs Lisp. */
2198 setlocale (LC_NUMERIC
, "C");
2201 /* Set system locale CATEGORY, with previous locale *PLOCALE, to
2204 synchronize_locale (int category
, Lisp_Object
*plocale
, Lisp_Object desired_locale
)
2206 if (! EQ (*plocale
, desired_locale
))
2208 *plocale
= desired_locale
;
2209 setlocale (category
, (STRINGP (desired_locale
)
2210 ? SSDATA (desired_locale
)
2215 /* Set system time locale to match Vsystem_time_locale, if possible. */
2217 synchronize_system_time_locale (void)
2219 synchronize_locale (LC_TIME
, &Vprevious_system_time_locale
,
2220 Vsystem_time_locale
);
2223 /* Set system messages locale to match Vsystem_messages_locale, if
2226 synchronize_system_messages_locale (void)
2229 synchronize_locale (LC_MESSAGES
, &Vprevious_system_messages_locale
,
2230 Vsystem_messages_locale
);
2233 #endif /* HAVE_SETLOCALE */
2240 decode_env_path (const char *evarname
, const char *defalt
)
2242 const char *path
, *p
;
2243 Lisp_Object lpath
, element
, tem
;
2245 /* It's okay to use getenv here, because this function is only used
2246 to initialize variables when Emacs starts up, and isn't called
2249 path
= getenv (evarname
);
2255 /* Ensure values from the environment use the proper directory separator. */
2258 char *path_copy
= alloca (strlen (path
) + 1);
2259 strcpy (path_copy
, path
);
2260 dostounix_filename (path_copy
);
2267 p
= strchr (path
, SEPCHAR
);
2269 p
= path
+ strlen (path
);
2270 element
= (p
- path
? make_string (path
, p
- path
)
2271 : build_string ("."));
2273 /* Add /: to the front of the name
2274 if it would otherwise be treated as magic. */
2275 tem
= Ffind_file_name_handler (element
, Qt
);
2277 /* However, if the handler says "I'm safe",
2278 don't bother adding /:. */
2282 prop
= Fget (tem
, intern ("safe-magic"));
2288 element
= concat2 (build_string ("/:"), element
);
2290 lpath
= Fcons (element
, lpath
);
2296 return Fnreverse (lpath
);
2299 DEFUN ("daemonp", Fdaemonp
, Sdaemonp
, 0, 0, 0,
2300 doc
: /* Return non-nil if the current emacs process is a daemon.
2301 If the daemon was given a name argument, return that name. */)
2306 return build_string (daemon_name
);
2313 DEFUN ("daemon-initialized", Fdaemon_initialized
, Sdaemon_initialized
, 0, 0, 0,
2314 doc
: /* Mark the Emacs daemon as being initialized.
2315 This finishes the daemonization process by doing the other half of detaching
2316 from the parent process and its tty file descriptors. */)
2323 error ("This function can only be called if emacs is run as a daemon");
2325 if (daemon_pipe
[1] < 0)
2326 error ("The daemon has already been initialized");
2328 if (NILP (Vafter_init_time
))
2329 error ("This function can only be called after loading the init files");
2331 /* Get rid of stdin, stdout and stderr. */
2332 nfd
= open ("/dev/null", O_RDWR
);
2334 err
|= dup2 (nfd
, 0) < 0;
2335 err
|= dup2 (nfd
, 1) < 0;
2336 err
|= dup2 (nfd
, 2) < 0;
2337 err
|= close (nfd
) != 0;
2339 /* Closing the pipe will notify the parent that it can exit.
2340 FIXME: In case some other process inherited the pipe, closing it here
2341 won't notify the parent because it's still open elsewhere, so we
2342 additionally send a byte, just to make sure the parent really exits.
2343 Instead, we should probably close the pipe in start-process and
2344 call-process to make sure the pipe is never inherited by
2346 err
|= write (daemon_pipe
[1], "\n", 1) < 0;
2347 err
|= close (daemon_pipe
[1]) != 0;
2348 /* Set it to an invalid value so we know we've already run this function. */
2349 daemon_pipe
[1] = -1;
2352 error ("I/O error during daemon initialization");
2357 syms_of_emacs (void)
2359 Qfile_name_handler_alist
= intern_c_string ("file-name-handler-alist");
2360 staticpro (&Qfile_name_handler_alist
);
2361 Qrisky_local_variable
= intern_c_string ("risky-local-variable");
2362 staticpro (&Qrisky_local_variable
);
2365 defsubr (&Sdump_emacs
);
2368 defsubr (&Skill_emacs
);
2370 defsubr (&Sinvocation_name
);
2371 defsubr (&Sinvocation_directory
);
2372 defsubr (&Sdaemonp
);
2373 defsubr (&Sdaemon_initialized
);
2375 DEFVAR_LISP ("command-line-args", Vcommand_line_args
,
2376 doc
: /* Args passed by shell to Emacs, as a list of strings.
2377 Many arguments are deleted from the list as they are processed. */);
2379 DEFVAR_LISP ("system-type", Vsystem_type
,
2380 doc
: /* The value is a symbol indicating the type of operating system you are using.
2382 `gnu' compiled for a GNU Hurd system.
2383 `gnu/linux' compiled for a GNU/Linux system.
2384 `gnu/kfreebsd' compiled for a GNU system with a FreeBSD kernel.
2385 `darwin' compiled for Darwin (GNU-Darwin, Mac OS X, ...).
2386 `ms-dos' compiled as an MS-DOS application.
2387 `windows-nt' compiled as a native W32 application.
2388 `cygwin' compiled using the Cygwin library.
2389 Anything else (in Emacs 24.1, the possibilities are: aix, berkeley-unix,
2390 hpux, irix, usg-unix-v) indicates some sort of Unix system. */);
2391 Vsystem_type
= intern_c_string (SYSTEM_TYPE
);
2392 /* The above values are from SYSTEM_TYPE in include files under src/s. */
2394 DEFVAR_LISP ("system-configuration", Vsystem_configuration
,
2395 doc
: /* Value is string indicating configuration Emacs was built for.
2396 On MS-Windows, the value reflects the OS flavor and version on which
2397 Emacs is running. */);
2398 Vsystem_configuration
= build_string (EMACS_CONFIGURATION
);
2400 DEFVAR_LISP ("system-configuration-options", Vsystem_configuration_options
,
2401 doc
: /* String containing the configuration options Emacs was built with. */);
2402 Vsystem_configuration_options
= build_string (EMACS_CONFIG_OPTIONS
);
2404 DEFVAR_BOOL ("noninteractive", noninteractive1
,
2405 doc
: /* Non-nil means Emacs is running without interactive terminal. */);
2407 DEFVAR_LISP ("kill-emacs-hook", Vkill_emacs_hook
,
2408 doc
: /* Hook to be run when `kill-emacs' is called.
2409 Since `kill-emacs' may be invoked when the terminal is disconnected (or
2410 in other similar situations), functions placed on this hook should not
2411 expect to be able to interact with the user. To ask for confirmation,
2412 see `kill-emacs-query-functions' instead.
2414 Before Emacs 24.1, the hook was not run in batch mode, i.e., if
2415 `noninteractive' was non-nil. */);
2416 Vkill_emacs_hook
= Qnil
;
2418 DEFVAR_LISP ("path-separator", Vpath_separator
,
2419 doc
: /* String containing the character that separates directories in
2420 search paths, such as PATH and other similar environment variables. */);
2423 Vpath_separator
= make_string (&c
, 1);
2426 DEFVAR_LISP ("invocation-name", Vinvocation_name
,
2427 doc
: /* The program name that was used to run Emacs.
2428 Any directory names are omitted. */);
2430 DEFVAR_LISP ("invocation-directory", Vinvocation_directory
,
2431 doc
: /* The directory in which the Emacs executable was found, to run it.
2432 The value is nil if that directory's name is not known. */);
2434 DEFVAR_LISP ("installation-directory", Vinstallation_directory
,
2435 doc
: /* A directory within which to look for the `lib-src' and `etc' directories.
2436 This is non-nil when we can't find those directories in their standard
2437 installed locations, but we can find them near where the Emacs executable
2439 Vinstallation_directory
= Qnil
;
2441 DEFVAR_LISP ("system-messages-locale", Vsystem_messages_locale
,
2442 doc
: /* System locale for messages. */);
2443 Vsystem_messages_locale
= Qnil
;
2445 DEFVAR_LISP ("previous-system-messages-locale",
2446 Vprevious_system_messages_locale
,
2447 doc
: /* Most recently used system locale for messages. */);
2448 Vprevious_system_messages_locale
= Qnil
;
2450 DEFVAR_LISP ("system-time-locale", Vsystem_time_locale
,
2451 doc
: /* System locale for time. */);
2452 Vsystem_time_locale
= Qnil
;
2454 DEFVAR_LISP ("previous-system-time-locale", Vprevious_system_time_locale
,
2455 doc
: /* Most recently used system locale for time. */);
2456 Vprevious_system_time_locale
= Qnil
;
2458 DEFVAR_LISP ("before-init-time", Vbefore_init_time
,
2459 doc
: /* Value of `current-time' before Emacs begins initialization. */);
2460 Vbefore_init_time
= Qnil
;
2462 DEFVAR_LISP ("after-init-time", Vafter_init_time
,
2463 doc
: /* Value of `current-time' after loading the init files.
2464 This is nil during initialization. */);
2465 Vafter_init_time
= Qnil
;
2467 DEFVAR_BOOL ("inhibit-x-resources", inhibit_x_resources
,
2468 doc
: /* If non-nil, X resources, Windows Registry settings, and NS defaults are not used. */);
2469 inhibit_x_resources
= 0;
2471 DEFVAR_LISP ("emacs-copyright", Vemacs_copyright
,
2472 doc
: /* Short copyright string for this version of Emacs. */);
2473 Vemacs_copyright
= build_string (emacs_copyright
);
2475 DEFVAR_LISP ("emacs-version", Vemacs_version
,
2476 doc
: /* Version numbers of this version of Emacs. */);
2477 Vemacs_version
= build_string (emacs_version
);
2479 DEFVAR_LISP ("dynamic-library-alist", Vdynamic_library_alist
,
2480 doc
: /* Alist of dynamic libraries vs external files implementing them.
2481 Each element is a list (LIBRARY FILE...), where the car is a symbol
2482 representing a supported external library, and the rest are strings giving
2483 alternate filenames for that library.
2485 Emacs tries to load the library from the files in the order they appear on
2486 the list; if none is loaded, the running session of Emacs won't have access
2489 Note that image types `pbm' and `xbm' do not need entries in this variable
2490 because they do not depend on external libraries and are always available.
2492 Also note that this is not a generic facility for accessing external
2493 libraries; only those already known by Emacs will be loaded. */);
2494 Vdynamic_library_alist
= Qnil
;
2495 Fput (intern_c_string ("dynamic-library-alist"), Qrisky_local_variable
, Qt
);
2497 /* Make sure IS_DAEMON starts up as false. */