1 /* Fully extensible Emacs, running on Unix, intended for GNU.
2 Copyright (C) 1985,86,87,93,94,95,97,1998 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
28 #include <sys/types.h>
36 #include <sys/ioctl.h>
41 #include "intervals.h"
45 #include "blockinput.h"
46 #include "syssignal.h"
52 #include <sys/resource.h>
59 extern void malloc_warning ();
60 extern void set_time_zone_rule ();
61 extern char *index ();
62 extern char *strerror ();
64 /* Command line args from shell, as list of strings */
65 Lisp_Object Vcommand_line_args
;
67 /* The name under which Emacs was invoked, with any leading directory
69 Lisp_Object Vinvocation_name
;
71 /* The directory name from which Emacs was invoked. */
72 Lisp_Object Vinvocation_directory
;
74 /* The directory name in which to find subdirs such as lisp and etc.
75 nil means get them only from PATH_LOADSEARCH. */
76 Lisp_Object Vinstallation_directory
;
78 /* Hook run by `kill-emacs' before it does really anything. */
79 Lisp_Object Vkill_emacs_hook
;
82 /* Hooks for signal USR1 and USR2 handing */
83 Lisp_Object Vsignal_USR1_hook
;
85 Lisp_Object Vsignal_USR2_hook
;
89 /* Search path separator. */
90 Lisp_Object Vpath_separator
;
92 /* Set nonzero after Emacs has started up the first time.
93 Prevents reinitialization of the Lisp world and keymaps
94 on subsequent starts. */
97 #ifdef DOUG_LEA_MALLOC
98 /* Preserves a pointer to the memory allocated that copies that
99 static data inside glibc's malloc. */
100 void *malloc_state_ptr
;
101 /* From glibc, a routine that returns a copy of the malloc internal state. */
102 extern void *malloc_get_state ();
103 /* From glibc, a routine that overwrites the malloc internal state. */
104 extern void malloc_set_state ();
107 /* Variable whose value is symbol giving operating system type. */
108 Lisp_Object Vsystem_type
;
110 /* Variable whose value is string giving configuration built for. */
111 Lisp_Object Vsystem_configuration
;
113 /* Variable whose value is string giving configuration options,
114 for use when reporting bugs. */
115 Lisp_Object Vsystem_configuration_options
;
117 Lisp_Object Qfile_name_handler_alist
;
119 /* If non-zero, emacs should not attempt to use an window-specific code,
120 but instead should use the virtual terminal under which it was started */
121 int inhibit_window_system
;
123 /* If nonzero, set Emacs to run at this priority. This is also used
124 in child_setup and sys_suspend to make sure subshells run at normal
125 priority; Those functions have their own extern declaration. */
128 /* If non-zero a filter or a sentinel is running. Tested to save the match
129 data on the first attempt to change it inside asynchronous code. */
130 int running_asynch_code
;
134 extern int inherited_pgroup
;
137 #ifdef HAVE_X_WINDOWS
138 /* If non-zero, -d was specified, meaning we're using some window system. */
142 /* An address near the bottom of the stack.
143 Tells GC how to save a copy of the stack. */
146 #ifdef HAVE_WINDOW_SYSTEM
147 extern Lisp_Object Vwindow_system
;
148 #endif /* HAVE_WINDOW_SYSTEM */
150 extern Lisp_Object Vauto_save_list_file_name
;
152 #ifdef USG_SHARED_LIBRARIES
153 /* If nonzero, this is the place to put the end of the writable segment
156 unsigned int bss_end
= 0;
159 /* Nonzero means running Emacs without interactive terminal. */
163 /* Value of Lisp variable `noninteractive'.
164 Normally same as C variable `noninteractive'
165 but nothing terrible happens if user sets this one. */
169 /* Save argv and argc. */
173 static void sort_args ();
174 void syms_of_emacs ();
176 /* Signal code for the fatal signal that was received */
177 int fatal_error_code
;
179 /* Nonzero if handling a fatal error already */
180 int fatal_error_in_progress
;
183 int SIGUSR1_in_progress
=0;
185 handle_USR1_signal (sig
)
188 if (! SIGUSR1_in_progress
)
190 SIGUSR1_in_progress
= 1;
192 if (!NILP (Vrun_hooks
) && !noninteractive
)
193 call1 (Vrun_hooks
, intern ("signal-USR1-hook"));
195 SIGUSR1_in_progress
= 0;
200 int SIGUSR2_in_progress
=0;
202 handle_USR2_signal (sig
)
205 if (! SIGUSR2_in_progress
)
207 SIGUSR2_in_progress
= 1;
209 if (!NILP (Vrun_hooks
) && !noninteractive
)
210 call1 (Vrun_hooks
, intern ("signal-USR2-hook"));
212 SIGUSR2_in_progress
= 0;
218 /* Handle bus errors, illegal instruction, etc. */
220 fatal_error_signal (sig
)
223 fatal_error_code
= sig
;
224 signal (sig
, SIG_DFL
);
226 TOTALLY_UNBLOCK_INPUT
;
228 /* If fatal error occurs in code below, avoid infinite recursion. */
229 if (! fatal_error_in_progress
)
231 fatal_error_in_progress
= 1;
233 shut_down_emacs (sig
, 0, Qnil
);
237 LIB$
STOP (SS$_ABORT
);
239 /* Signal the same code; this time it will really be fatal.
240 Remember that since we're in a signal handler, the signal we're
241 going to send is probably blocked, so we have to unblock it if we
242 want to really receive it. */
244 sigunblock (sigmask (fatal_error_code
));
246 kill (getpid (), fatal_error_code
);
252 /* Handler for SIGDANGER. */
254 memory_warning_signal (sig
)
257 signal (sig
, memory_warning_signal
);
259 malloc_warning ("Operating system warns that virtual memory is running low.\n");
261 /* It might be unsafe to call do_auto_save now. */
262 force_auto_save_soon ();
266 /* We define abort, rather than using it from the library,
267 so that GDB can return from a breakpoint here.
268 MSDOS has its own definition on msdos.c */
270 #if ! defined (DOS_NT) && ! defined (NO_ABORT)
274 kill (getpid (), SIGABRT
);
275 /* This shouldn't be executed, but it prevents a warning. */
281 /* Code for dealing with Lisp access to the Unix command line */
284 init_cmdargs (argc
, argv
, skip_args
)
290 Lisp_Object name
, dir
, tem
;
291 int count
= specpdl_ptr
- specpdl
;
292 Lisp_Object raw_name
;
297 raw_name
= build_string (argv
[0]);
299 /* Add /: to the front of the name
300 if it would otherwise be treated as magic. */
301 tem
= Ffind_file_name_handler (raw_name
, Qt
);
303 raw_name
= concat2 (build_string ("/:"), raw_name
);
305 Vinvocation_name
= Ffile_name_nondirectory (raw_name
);
306 Vinvocation_directory
= Ffile_name_directory (raw_name
);
308 /* If we got no directory in argv[0], search PATH to find where
309 Emacs actually came from. */
310 if (NILP (Vinvocation_directory
))
313 int yes
= openp (Vexec_path
, Vinvocation_name
,
314 EXEC_SUFFIXES
, &found
, 1);
317 /* Add /: to the front of the name
318 if it would otherwise be treated as magic. */
319 tem
= Ffind_file_name_handler (found
, Qt
);
321 found
= concat2 (build_string ("/:"), found
);
322 Vinvocation_directory
= Ffile_name_directory (found
);
326 if (!NILP (Vinvocation_directory
)
327 && NILP (Ffile_name_absolute_p (Vinvocation_directory
)))
328 /* Emacs was started with relative path, like ./emacs.
330 Vinvocation_directory
= Fexpand_file_name (Vinvocation_directory
, Qnil
);
332 Vinstallation_directory
= Qnil
;
334 if (!NILP (Vinvocation_directory
))
336 dir
= Vinvocation_directory
;
337 name
= Fexpand_file_name (Vinvocation_name
, dir
);
340 Lisp_Object tem
, lib_src_exists
;
341 Lisp_Object etc_exists
, info_exists
;
343 /* See if dir contains subdirs for use by Emacs.
344 Check for the ones that would exist in a build directory,
345 not including lisp and info. */
346 tem
= Fexpand_file_name (build_string ("lib-src"), dir
);
347 lib_src_exists
= Ffile_exists_p (tem
);
350 /* MSDOS installations frequently remove lib-src, but we still
351 must set installation-directory, or else info won't find
352 its files (it uses the value of installation-directory). */
353 tem
= Fexpand_file_name (build_string ("info"), dir
);
354 info_exists
= Ffile_exists_p (tem
);
359 if (!NILP (lib_src_exists
) || !NILP (info_exists
))
361 tem
= Fexpand_file_name (build_string ("etc"), dir
);
362 etc_exists
= Ffile_exists_p (tem
);
363 if (!NILP (etc_exists
))
365 Vinstallation_directory
366 = Ffile_name_as_directory (dir
);
371 /* See if dir's parent contains those subdirs. */
372 tem
= Fexpand_file_name (build_string ("../lib-src"), dir
);
373 lib_src_exists
= Ffile_exists_p (tem
);
377 /* See the MSDOS commentary above. */
378 tem
= Fexpand_file_name (build_string ("../info"), dir
);
379 info_exists
= Ffile_exists_p (tem
);
384 if (!NILP (lib_src_exists
) || !NILP (info_exists
))
386 tem
= Fexpand_file_name (build_string ("../etc"), dir
);
387 etc_exists
= Ffile_exists_p (tem
);
388 if (!NILP (etc_exists
))
390 tem
= Fexpand_file_name (build_string (".."), dir
);
391 Vinstallation_directory
392 = Ffile_name_as_directory (tem
);
397 /* If the Emacs executable is actually a link,
398 next try the dir that the link points into. */
399 tem
= Ffile_symlink_p (name
);
402 name
= Fexpand_file_name (tem
, dir
);
403 dir
= Ffile_name_directory (name
);
410 Vcommand_line_args
= Qnil
;
412 for (i
= argc
- 1; i
>= 0; i
--)
414 if (i
== 0 || i
> skip_args
)
416 = Fcons (build_string (argv
[i
]), Vcommand_line_args
);
419 unbind_to (count
, Qnil
);
422 DEFUN ("invocation-name", Finvocation_name
, Sinvocation_name
, 0, 0, 0,
423 "Return the program name that was used to run Emacs.\n\
424 Any directory names are omitted.")
427 return Fcopy_sequence (Vinvocation_name
);
430 DEFUN ("invocation-directory", Finvocation_directory
, Sinvocation_directory
,
432 "Return the directory name in which the Emacs executable was located")
435 return Fcopy_sequence (Vinvocation_directory
);
440 #ifdef LINK_CRTL_SHARE
441 #ifdef SHARABLE_LIB_BUG
442 extern noshare
char **environ
;
443 #endif /* SHARABLE_LIB_BUG */
444 #endif /* LINK_CRTL_SHARE */
448 /* A valid but unlikely value for the TZ environment value.
449 It is OK (though a bit slower) if the user actually chooses this value. */
450 static char dump_tz
[] = "UtC0";
453 #ifndef ORDINARY_LINK
454 /* We don't include crtbegin.o and crtend.o in the link,
455 so these functions and variables might be missed.
456 Provide dummy definitions to avoid error.
457 (We don't have any real constructors or destructors.) */
459 #ifndef GCC_CTORS_IN_LIBC
460 void __do_global_ctors ()
462 void __do_global_ctors_aux ()
464 void __do_global_dtors ()
466 /* Linux has a bug in its library; avoid an error. */
468 char * __CTOR_LIST__
[2] = { (char *) (-1), 0 };
470 char * __DTOR_LIST__
[2] = { (char *) (-1), 0 };
471 #endif /* GCC_CTORS_IN_LIBC */
474 #endif /* __GNUC__ */
475 #endif /* ORDINARY_LINK */
477 /* Test whether the next argument in ARGV matches SSTR or a prefix of
478 LSTR (at least MINLEN characters). If so, then if VALPTR is non-null
479 (the argument is supposed to have a value) store in *VALPTR either
480 the next argument or the portion of this one after the equal sign.
481 ARGV is read starting at position *SKIPPTR; this index is advanced
482 by the number of arguments used.
484 Too bad we can't just use getopt for all of this, but we don't have
485 enough information to do it right. */
488 argmatch (argv
, argc
, sstr
, lstr
, minlen
, valptr
, skipptr
)
501 /* Don't access argv[argc]; give up in advance. */
502 if (argc
<= *skipptr
+ 1)
505 arg
= argv
[*skipptr
+1];
508 if (strcmp (arg
, sstr
) == 0)
512 *valptr
= argv
[*skipptr
+2];
519 arglen
= (valptr
!= NULL
&& (p
= index (arg
, '=')) != NULL
520 ? p
- arg
: strlen (arg
));
521 if (lstr
== 0 || arglen
< minlen
|| strncmp (arg
, lstr
, arglen
) != 0)
523 else if (valptr
== NULL
)
534 else if (argv
[*skipptr
+2] != NULL
)
536 *valptr
= argv
[*skipptr
+2];
548 main (argc
, argv
, envp
)
553 char stack_bottom_variable
;
557 #ifdef HAVE_SETRLIMIT
562 #ifdef LINUX_SBRK_BUG
566 #ifdef DOUG_LEA_MALLOC
569 extern void r_alloc_reinit ();
570 malloc_set_state (malloc_state_ptr
);
571 free (malloc_state_ptr
);
576 #ifdef RUN_TIME_REMAP
578 run_time_remap (argv
[0]);
581 sort_args (argc
, argv
);
583 while (argv
[argc
]) argc
++;
585 if (argmatch (argv
, argc
, "-version", "--version", 3, NULL
, &skip_args
)
586 /* We don't know the version number unless this is a dumped Emacs.
587 So ignore --version otherwise. */
591 tem
= Fsymbol_value (intern ("emacs-version"));
594 fprintf (stderr
, "Invalid value of `emacs-version'\n");
599 printf ("GNU Emacs %s\n", XSTRING (tem
)->data
);
600 printf ("Copyright (C) 1998 Free Software Foundation, Inc.\n");
601 printf ("GNU Emacs comes with ABSOLUTELY NO WARRANTY.\n");
602 printf ("You may redistribute copies of Emacs\n");
603 printf ("under the terms of the GNU General Public License.\n");
604 printf ("For more information about these matters, ");
605 printf ("see the file named COPYING.\n");
610 /* Map in shared memory, if we are using that. */
612 if (argmatch (argv
, argc
, "-nl", "--no-shared-memory", 6, NULL
, &skip_args
))
615 /* The shared memory was just restored, which clobbered this. */
621 /* The shared memory was just restored, which clobbered this. */
628 extern int malloc_cookie
;
629 /* This helps out unexnext.c. */
631 if (malloc_jumpstart (malloc_cookie
) != 0)
632 printf ("malloc jumpstart failed!\n");
637 /* If -map specified, map the data file in */
640 if (argmatch (argv
, argc
, "-map", "--map-data", 3, &mapin_file
, &skip_args
))
644 #ifdef LINK_CRTL_SHARE
645 #ifdef SHARABLE_LIB_BUG
646 /* Bletcherous shared libraries! */
648 stdin
= fdopen (0, "r");
650 stdout
= fdopen (1, "w");
652 stderr
= fdopen (2, "w");
655 #endif /* SHARABLE_LIB_BUG */
656 #endif /* LINK_CRTL_SHARE */
659 #if defined (HAVE_SETRLIMIT) && defined (RLIMIT_STACK)
660 /* Extend the stack space available.
661 Don't do that if dumping, since some systems (e.g. DJGPP)
662 might define a smaller stack limit at that time. */
665 && (!noninteractive
|| initialized
)
667 && !getrlimit (RLIMIT_STACK
, &rlim
))
670 extern int re_max_failures
;
671 /* Approximate the amount regex.c needs per unit of re_max_failures. */
672 int ratio
= 20 * sizeof (char *);
673 /* Then add 33% to cover the size of the smaller stacks that regex.c
674 successively allocates and discards, on its way to the maximum. */
676 /* Add in some extra to cover
677 what we're likely to use for other reasons. */
678 newlim
= re_max_failures
* ratio
+ 200000;
680 /* NetBSD (at least NetBSD 1.2G and former) has a bug in its
681 stack allocation routine for new process that the allocation
682 fails if stack limit is not on page boundary. So, round up the
683 new limit to page boundary. */
684 newlim
= (newlim
+ getpagesize () - 1) / getpagesize () * getpagesize();
686 if (newlim
> rlim
.rlim_max
)
688 newlim
= rlim
.rlim_max
;
689 /* Don't let regex.c overflow the stack we have. */
690 re_max_failures
= (newlim
- 200000) / ratio
;
692 if (rlim
.rlim_cur
< newlim
)
693 rlim
.rlim_cur
= newlim
;
695 setrlimit (RLIMIT_STACK
, &rlim
);
697 #endif /* HAVE_SETRLIMIT and RLIMIT_STACK */
699 /* Record (approximately) where the stack begins. */
700 stack_bottom
= &stack_bottom_variable
;
702 #ifdef USG_SHARED_LIBRARIES
704 brk ((void *)bss_end
);
709 #ifndef SYSTEM_MALLOC
712 /* Arrange to get warning messages as memory fills up. */
713 memory_warnings (0, malloc_warning
);
715 /* Arrange to disable interrupt input while malloc and friends are
717 uninterrupt_malloc ();
719 #endif /* not SYSTEM_MALLOC */
722 /* We do all file input/output as binary files. When we need to translate
723 newlines, we do that manually. */
727 if (!isatty (fileno (stdin
)))
728 setmode (fileno (stdin
), O_BINARY
);
729 if (!isatty (fileno (stdout
)))
732 setmode (fileno (stdout
), O_BINARY
);
734 #else /* not __DJGPP__ >= 2 */
735 (stdin
)->_flag
&= ~_IOTEXT
;
736 (stdout
)->_flag
&= ~_IOTEXT
;
737 (stderr
)->_flag
&= ~_IOTEXT
;
738 #endif /* not __DJGPP__ >= 2 */
741 #ifdef SET_EMACS_PRIORITY
743 nice (emacs_priority
);
745 #endif /* SET_EMACS_PRIORITY */
747 #ifdef EXTRA_INITIALIZE
751 inhibit_window_system
= 0;
753 /* Handle the -t switch, which specifies filename to use as terminal */
757 if (argmatch (argv
, argc
, "-t", "--terminal", 4, &term
, &skip_args
))
762 result
= open (term
, O_RDWR
, 2 );
765 char *errstring
= strerror (errno
);
766 fprintf (stderr
, "emacs: %s: %s\n", term
, errstring
);
772 fprintf (stderr
, "emacs: %s: not a tty\n", term
);
775 fprintf (stderr
, "Using %s\n", term
);
776 #ifdef HAVE_WINDOW_SYSTEM
777 inhibit_window_system
= 1; /* -t => -nw */
784 if (argmatch (argv
, argc
, "-nw", "--no-windows", 6, NULL
, &skip_args
))
785 inhibit_window_system
= 1;
787 /* Handle the -batch switch, which means don't do interactive display. */
789 if (argmatch (argv
, argc
, "-batch", "--batch", 5, NULL
, &skip_args
))
792 /* Handle the --help option, which gives a usage message.. */
793 if (argmatch (argv
, argc
, "-help", "--help", 3, NULL
, &skip_args
))
796 Usage: %s [--batch] [-t term] [--terminal term]\n\
797 [-d display] [--display display] [-nw] [--no-windows]\n\
798 [-q] [--no-init-file] [-u user] [--user user] [--debug-init]\n\
799 [--unibyte] [--multibyte] [--version] [--no-site-file]\n\
800 [-f func] [--funcall func] [-l file] [--load file] [--eval expr]\n\
801 [--insert file] [+linenum] file-to-visit [--kill]\n\
802 Report bugs to bug-gnu-emacs@gnu.org. First, please see\n\
803 the Bugs section of the Emacs manual or the file BUGS.\n", argv
[0]);
807 if (! noninteractive
)
812 inherited_pgroup
= EMACS_GETPGRP (0);
813 setpgrp (0, getpid ());
816 #if defined (USG5) && defined (INTERRUPT_INPUT)
826 /* Don't catch SIGHUP if dumping. */
833 sigblock (sigmask (SIGHUP
));
834 /* In --batch mode, don't catch SIGHUP if already ignored.
835 That makes nohup work. */
837 || signal (SIGHUP
, SIG_IGN
) != SIG_IGN
)
838 signal (SIGHUP
, fatal_error_signal
);
839 sigunblock (sigmask (SIGHUP
));
844 ! noninteractive
|| initialized
850 /* Don't catch these signals in batch mode if dumping.
851 On some machines, this sets static data that would make
852 signal fail to work right when the dumped Emacs is run. */
853 signal (SIGQUIT
, fatal_error_signal
);
854 signal (SIGILL
, fatal_error_signal
);
855 signal (SIGTRAP
, fatal_error_signal
);
857 signal (SIGUSR1
, handle_USR1_signal
);
859 signal (SIGUSR2
, handle_USR2_signal
);
863 signal (SIGABRT
, fatal_error_signal
);
866 signal (SIGHWE
, fatal_error_signal
);
869 signal (SIGPRE
, fatal_error_signal
);
872 signal (SIGORE
, fatal_error_signal
);
875 signal (SIGUME
, fatal_error_signal
);
878 signal (SIGDLK
, fatal_error_signal
);
881 signal (SIGCPULIM
, fatal_error_signal
);
884 /* This is missing on some systems - OS/2, for example. */
885 signal (SIGIOT
, fatal_error_signal
);
888 signal (SIGEMT
, fatal_error_signal
);
890 signal (SIGFPE
, fatal_error_signal
);
892 signal (SIGBUS
, fatal_error_signal
);
894 signal (SIGSEGV
, fatal_error_signal
);
896 signal (SIGSYS
, fatal_error_signal
);
898 signal (SIGTERM
, fatal_error_signal
);
900 signal (SIGXCPU
, fatal_error_signal
);
903 signal (SIGXFSZ
, fatal_error_signal
);
907 /* This just means available memory is getting low. */
908 signal (SIGDANGER
, memory_warning_signal
);
912 /* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU. */
913 signal (SIGXCPU
, fatal_error_signal
);
915 signal (SIGIOINT
, fatal_error_signal
);
917 signal (SIGGRANT
, fatal_error_signal
);
918 signal (SIGRETRACT
, fatal_error_signal
);
919 signal (SIGSOUND
, fatal_error_signal
);
920 signal (SIGMSG
, fatal_error_signal
);
924 noninteractive1
= noninteractive
;
926 /* Perform basic initializations (not merely interning symbols) */
933 init_charset_once ();
935 init_syntax_once (); /* Create standard syntax table. */
936 init_category_once (); /* Create standard category table. */
937 /* Must be done before init_buffer */
938 init_casetab_once ();
939 init_buffer_once (); /* Create buffer table and some buffers */
940 init_minibuf_once (); /* Create list of minibuffers */
941 /* Must precede init_window_once */
942 init_window_once (); /* Init the window system */
943 init_fileio_once (); /* Must precede any path manipulation. */
950 running_asynch_code
= 0;
952 /* Handle --unibyte and the EMACS_UNIBYTE envvar,
953 but not while dumping. */
956 ! noninteractive
|| initialized
962 int inhibit_unibyte
= 0;
964 /* --multibyte overrides EMACS_UNIBYTE. */
965 if (argmatch (argv
, argc
, "-no-unibyte", "--no-unibyte", 4, NULL
, &skip_args
)
966 || argmatch (argv
, argc
, "-multibyte", "--multibyte", 4, NULL
, &skip_args
))
969 /* --unibyte requests that we set up to do everything with single-byte
970 buffers and strings. We need to handle this before calling
971 init_lread, init_editfns and other places that generate Lisp strings
972 from text in the environment. */
973 if (argmatch (argv
, argc
, "-unibyte", "--unibyte", 4, NULL
, &skip_args
)
974 || argmatch (argv
, argc
, "-no-multibyte", "--no-multibyte", 4, NULL
, &skip_args
)
975 || (getenv ("EMACS_UNIBYTE") && !inhibit_unibyte
))
977 Lisp_Object old_log_max
;
978 Lisp_Object symbol
, tail
;
980 symbol
= intern ("default-enable-multibyte-characters");
985 /* Erase pre-dump messages in *Messages* now so no abort. */
986 old_log_max
= Vmessage_log_max
;
987 XSETFASTINT (Vmessage_log_max
, 0);
988 message_dolog ("", 0, 1, 0);
989 Vmessage_log_max
= old_log_max
;
992 for (tail
= Vbuffer_alist
; CONSP (tail
);
993 tail
= XCONS (tail
)->cdr
)
997 buffer
= Fcdr (XCONS (tail
)->car
);
998 /* Verify that all buffers are empty now, as they
1000 if (BUF_Z (XBUFFER (buffer
)) > BUF_BEG (XBUFFER (buffer
)))
1002 /* It is safe to do this crudely in an empty buffer. */
1003 XBUFFER (buffer
)->enable_multibyte_characters
= Qnil
;
1009 = !argmatch (argv
, argc
, "-nl", "--no-loadup", 6, NULL
, &skip_args
);
1012 #ifdef HAVE_X_WINDOWS
1013 /* Stupid kludge to catch command-line display spec. We can't
1014 handle this argument entirely in window system dependent code
1015 because we don't even know which window system dependent code
1016 to run until we've recognized this argument. */
1018 char *displayname
= 0;
1020 int count_before
= skip_args
;
1022 /* Skip any number of -d options, but only use the last one. */
1025 int count_before_this
= skip_args
;
1027 if (argmatch (argv
, argc
, "-d", "--display", 3, &displayname
, &skip_args
))
1029 else if (argmatch (argv
, argc
, "-display", 0, 3, &displayname
, &skip_args
))
1034 count_before
= count_before_this
;
1037 /* If we have the form --display=NAME,
1038 convert it into -d name.
1039 This requires inserting a new element into argv. */
1040 if (displayname
!= 0 && skip_args
- count_before
== 1)
1042 char **new = (char **) xmalloc (sizeof (char *) * (argc
+ 2));
1045 for (j
= 0; j
< count_before
+ 1; j
++)
1047 new[count_before
+ 1] = "-d";
1048 new[count_before
+ 2] = displayname
;
1049 for (j
= count_before
+ 2; j
<argc
; j
++)
1050 new[j
+ 1] = argv
[j
];
1054 /* Change --display to -d, when its arg is separate. */
1055 else if (displayname
!= 0 && skip_args
> count_before
1056 && argv
[count_before
+ 1][1] == '-')
1057 argv
[count_before
+ 1] = "-d";
1059 /* Don't actually discard this arg. */
1060 skip_args
= count_before
;
1064 /* argmatch must not be used after here,
1065 except when bulding temacs
1066 because the -d argument has not been skipped in skip_args. */
1069 /* Call early 'cause init_environment needs it. */
1071 /* Set defaults for several environment variables. */
1073 init_environment (argc
, argv
, skip_args
);
1079 /* Initialize environment from registry settings. */
1080 init_environment ();
1081 init_ntproc (); /* must precede init_editfns */
1084 /* egetenv is a pretty low-level facility, which may get called in
1085 many circumstances; it seems flimsy to put off initializing it
1086 until calling init_callproc. */
1087 set_process_environment ();
1088 /* AIX crashes are reported in system versions 3.2.3 and 3.2.4
1089 if this is not done. Do it after set_process_environment so that we
1090 don't pollute Vprocess_environment. */
1095 init_buffer (); /* Init default directory of main buffer */
1097 init_callproc_1 (); /* Must precede init_cmdargs and init_sys_modes. */
1098 init_cmdargs (argc
, argv
, skip_args
); /* Must precede init_lread. */
1102 /* Erase any pre-dump messages in the message log, to avoid confusion */
1103 Lisp_Object old_log_max
;
1104 old_log_max
= Vmessage_log_max
;
1105 XSETFASTINT (Vmessage_log_max
, 0);
1106 message_dolog ("", 0, 1, 0);
1107 Vmessage_log_max
= old_log_max
;
1110 init_callproc (); /* Must follow init_cmdargs but not init_sys_modes. */
1113 /* Intern the names of all standard functions and variables;
1114 define standard keys. */
1118 /* The basic levels of Lisp must come first */
1119 /* And data must come first of all
1120 for the sake of symbols like error-message */
1127 syms_of_floatfns ();
1131 syms_of_bytecode ();
1133 syms_of_casefiddle ();
1135 syms_of_callproc ();
1136 syms_of_category ();
1140 #ifndef NO_DIR_LIBRARY
1142 #endif /* not NO_DIR_LIBRARY */
1148 syms_of_coding (); /* This should be after syms_of_fileio. */
1149 #ifdef CLASH_DETECTION
1150 syms_of_filelock ();
1151 #endif /* CLASH_DETECTION */
1154 syms_of_keyboard ();
1159 syms_of_mocklisp ();
1167 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
1168 syms_of_textprop ();
1174 #endif /* WINDOWSNT */
1177 #ifdef HAVE_X_WINDOWS
1184 #endif /* HAVE_X_WINDOWS */
1194 syms_of_w32faces ();
1195 syms_of_w32select ();
1198 #endif /* HAVE_NTGUI */
1208 keys_of_casefiddle ();
1211 keys_of_keyboard ();
1219 if (!noninteractive
)
1222 init_vms_input ();/* init_display calls get_frame_size, that needs this */
1224 init_display (); /* Determine terminal type. init_sys_modes uses results */
1226 init_keyboard (); /* This too must precede init_sys_modes */
1228 init_vmsproc (); /* And this too. */
1230 init_sys_modes (); /* Init system terminal modes (RAW or CBREAK, etc.) */
1234 #ifdef LISP_FLOAT_TYPE
1245 /* Handle -l loadup, args passed by Makefile. */
1246 if (argmatch (argv
, argc
, "-l", "--load", 3, &file
, &skip_args
))
1247 Vtop_level
= Fcons (intern ("load"),
1248 Fcons (build_string (file
), Qnil
));
1250 /* Unless next switch is -nl, load "loadup.el" first thing. */
1252 Vtop_level
= Fcons (intern ("load"),
1253 Fcons (build_string ("loadup.el"), Qnil
));
1254 #endif /* CANNOT_DUMP */
1261 /* If the execution TZ happens to be the same as the dump TZ,
1262 change it to some other value and then change it back,
1263 to force the underlying implementation to reload the TZ info.
1264 This is needed on implementations that load TZ info from files,
1265 since the TZ file contents may differ between dump and execution. */
1266 char *tz
= getenv ("TZ");
1267 if (tz
&& !strcmp (tz
, dump_tz
))
1277 /* Gerd Moellmann <gerd@acm.org> says this makes profiling work on
1278 FreeBSD. It might work on some other systems too.
1279 Give it a try and tell me if it works on your system. */
1284 extern void _mcleanup ();
1286 extern Lisp_Object
Fredraw_frame ();
1288 /* This uses Fredraw_frame because that function
1289 comes first in the Emacs executable.
1290 It might be better to use something that gives
1291 the start of the text segment, but start_of_text
1292 is not defined on all systems now. */
1293 monstartup (Fredraw_frame
, &etext
);
1302 #ifdef LOCALTIME_CACHE
1303 /* Some versions of localtime have a bug. They cache the value of the time
1304 zone rather than looking it up every time. Since localtime() is
1305 called to bolt the undumping time into the undumped emacs, this
1306 results in localtime ignoring the TZ environment variable.
1307 This flushes the new TZ value into localtime. */
1309 #endif /* defined (LOCALTIME_CACHE) */
1311 /* Enter editor command loop. This never returns. */
1316 /* Sort the args so we can find the most important ones
1317 at the beginning of argv. */
1319 /* First, here's a table of all the standard options. */
1321 struct standard_args
1329 struct standard_args standard_args
[] =
1331 { "-version", "--version", 150, 0 },
1333 { "-nl", "--no-shared-memory", 140, 0 },
1336 { "-map", "--map-data", 130, 0 },
1338 { "-t", "--terminal", 120, 1 },
1339 { "-nw", "--no-windows", 110, 0 },
1340 { "-batch", "--batch", 100, 0 },
1341 { "-help", "--help", 90, 0 },
1342 { "-no-unibyte", "--no-unibyte", 83, 0 },
1343 { "-multibyte", "--multibyte", 82, 0 },
1344 { "-unibyte", "--unibyte", 81, 0 },
1345 { "-no-multibyte", "--no-multibyte", 80, 0 },
1347 { "-nl", "--no-loadup", 70, 0 },
1349 /* -d must come last before the options handled in startup.el. */
1350 { "-d", "--display", 60, 1 },
1351 { "-display", 0, 60, 1 },
1352 /* Now for the options handled in startup.el. */
1353 { "-q", "--no-init-file", 50, 0 },
1354 { "-no-init-file", 0, 50, 0 },
1355 { "-no-site-file", "--no-site-file", 40, 0 },
1356 { "-u", "--user", 30, 1 },
1357 { "-user", 0, 30, 1 },
1358 { "-debug-init", "--debug-init", 20, 0 },
1359 { "-i", "--icon-type", 15, 0 },
1360 { "-itype", 0, 15, 0 },
1361 { "-iconic", "--iconic", 15, 0 },
1362 { "-bg", "--background-color", 10, 1 },
1363 { "-background", 0, 10, 1 },
1364 { "-fg", "--foreground-color", 10, 1 },
1365 { "-foreground", 0, 10, 1 },
1366 { "-bd", "--border-color", 10, 1 },
1367 { "-bw", "--border-width", 10, 1 },
1368 { "-ib", "--internal-border", 10, 1 },
1369 { "-ms", "--mouse-color", 10, 1 },
1370 { "-cr", "--cursor-color", 10, 1 },
1371 { "-fn", "--font", 10, 1 },
1372 { "-font", 0, 10, 1 },
1373 { "-g", "--geometry", 10, 1 },
1374 { "-geometry", 0, 10, 1 },
1375 { "-T", "--title", 10, 1 },
1376 { "-title", 0, 10, 1 },
1377 { "-name", "--name", 10, 1 },
1378 { "-xrm", "--xrm", 10, 1 },
1379 { "-r", "--reverse-video", 5, 0 },
1381 { "-reverse", 0, 5, 0 },
1382 { "-hb", "--horizontal-scroll-bars", 5, 0 },
1383 { "-vb", "--vertical-scroll-bars", 5, 0 },
1384 /* These have the same priority as ordinary file name args,
1385 so they are not reordered with respect to those. */
1386 { "-L", "--directory", 0, 1 },
1387 { "-directory", 0, 0, 1 },
1388 { "-l", "--load", 0, 1 },
1389 { "-load", 0, 0, 1 },
1390 { "-f", "--funcall", 0, 1 },
1391 { "-funcall", 0, 0, 1 },
1392 { "-eval", "--eval", 0, 1 },
1393 { "-find-file", "--find-file", 0, 1 },
1394 { "-visit", "--visit", 0, 1 },
1395 { "-insert", "--insert", 0, 1 },
1396 /* This should be processed after ordinary file name args and the like. */
1397 { "-kill", "--kill", -10, 0 },
1400 /* Reorder the elements of ARGV (assumed to have ARGC elements)
1401 so that the highest priority ones come first.
1402 Do not change the order of elements of equal priority.
1403 If an option takes an argument, keep it and its argument together.
1405 If an option that takes no argument appears more
1406 than once, eliminate all but one copy of it. */
1409 sort_args (argc
, argv
)
1413 char **new = (char **) xmalloc (sizeof (char *) * argc
);
1414 /* For each element of argv,
1415 the corresponding element of options is:
1416 0 for an option that takes no arguments,
1417 1 for an option that takes one argument, etc.
1418 -1 for an ordinary non-option argument. */
1419 int *options
= (int *) xmalloc (sizeof (int) * argc
);
1420 int *priority
= (int *) xmalloc (sizeof (int) * argc
);
1422 int incoming_used
= 1;
1425 int end_of_options
= argc
;
1427 /* Categorize all the options,
1428 and figure out which argv elts are option arguments. */
1429 for (from
= 1; from
< argc
; from
++)
1433 if (argv
[from
][0] == '-')
1438 /* If we have found "--", don't consider
1439 any more arguments as options. */
1440 if (argv
[from
][1] == '-' && argv
[from
][2] == 0)
1442 /* Leave the "--", and everything following it, at the end. */
1443 for (; from
< argc
; from
++)
1445 priority
[from
] = -100;
1451 /* Look for a match with a known old-fashioned option. */
1452 for (i
= 0; i
< sizeof (standard_args
) / sizeof (standard_args
[0]); i
++)
1453 if (!strcmp (argv
[from
], standard_args
[i
].name
))
1455 options
[from
] = standard_args
[i
].nargs
;
1456 priority
[from
] = standard_args
[i
].priority
;
1457 if (from
+ standard_args
[i
].nargs
>= argc
)
1458 fatal ("Option `%s' requires an argument\n", argv
[from
]);
1459 from
+= standard_args
[i
].nargs
;
1463 /* Look for a match with a known long option.
1464 MATCH is -1 if no match so far, -2 if two or more matches so far,
1465 >= 0 (the table index of the match) if just one match so far. */
1466 if (argv
[from
][1] == '-')
1469 thislen
= strlen (argv
[from
]);
1470 equals
= index (argv
[from
], '=');
1472 thislen
= equals
- argv
[from
];
1475 i
< sizeof (standard_args
) / sizeof (standard_args
[0]); i
++)
1476 if (standard_args
[i
].longname
1477 && !strncmp (argv
[from
], standard_args
[i
].longname
,
1486 /* If we found exactly one match, use that. */
1489 options
[from
] = standard_args
[match
].nargs
;
1490 priority
[from
] = standard_args
[match
].priority
;
1491 /* If --OPTION=VALUE syntax is used,
1492 this option uses just one argv element. */
1495 if (from
+ options
[from
] >= argc
)
1496 fatal ("Option `%s' requires an argument\n", argv
[from
]);
1497 from
+= options
[from
];
1504 /* Copy the arguments, in order of decreasing priority, to NEW. */
1506 while (incoming_used
< argc
)
1509 int best_priority
= -9999;
1511 /* Find the highest priority remaining option.
1512 If several have equal priority, take the first of them. */
1513 for (from
= 1; from
< argc
; from
++)
1515 if (argv
[from
] != 0 && priority
[from
] > best_priority
)
1517 best_priority
= priority
[from
];
1520 /* Skip option arguments--they are tied to the options. */
1521 if (options
[from
] > 0)
1522 from
+= options
[from
];
1528 /* Copy the highest priority remaining option, with its args, to NEW.
1529 Unless it is a duplicate of the previous one. */
1530 if (! (options
[best
] == 0
1531 && ! strcmp (new[to
- 1], argv
[best
])))
1533 new[to
++] = argv
[best
];
1534 for (i
= 0; i
< options
[best
]; i
++)
1535 new[to
++] = argv
[best
+ i
+ 1];
1538 incoming_used
+= 1 + (options
[best
] > 0 ? options
[best
] : 0);
1540 /* Clear out this option in ARGV. */
1542 for (i
= 0; i
< options
[best
]; i
++)
1543 argv
[best
+ i
+ 1] = 0;
1546 /* If duplicate options were deleted, fill up extra space with null ptrs. */
1550 bcopy (new, argv
, sizeof (char *) * argc
);
1557 DEFUN ("kill-emacs", Fkill_emacs
, Skill_emacs
, 0, 1, "P",
1558 "Exit the Emacs job and kill it.\n\
1559 If ARG is an integer, return ARG as the exit program code.\n\
1560 If ARG is a string, stuff it as keyboard input.\n\n\
1561 The value of `kill-emacs-hook', if not void,\n\
1562 is a list of functions (of no args),\n\
1563 all of which are called before Emacs is actually killed.")
1567 Lisp_Object hook
, hook1
;
1569 struct gcpro gcpro1
;
1576 if (!NILP (Vrun_hooks
) && !noninteractive
)
1577 call1 (Vrun_hooks
, intern ("kill-emacs-hook"));
1581 /* Is it really necessary to do this deassign
1582 when we are going to exit anyway? */
1587 shut_down_emacs (0, 0, STRINGP (arg
) ? arg
: Qnil
);
1589 /* If we have an auto-save list file,
1590 kill it because we are exiting Emacs deliberately (not crashing).
1591 Do it after shut_down_emacs, which does an auto-save. */
1592 if (STRINGP (Vauto_save_list_file_name
))
1593 unlink (XSTRING (Vauto_save_list_file_name
)->data
);
1595 exit (INTEGERP (arg
) ? XINT (arg
)
1606 /* Perform an orderly shutdown of Emacs. Autosave any modified
1607 buffers, kill any child processes, clean up the terminal modes (if
1608 we're in the foreground), and other stuff like that. Don't perform
1609 any redisplay; this may be called when Emacs is shutting down in
1610 the background, or after its X connection has died.
1612 If SIG is a signal number, print a message for it.
1614 This is called by fatal signal handlers, X protocol error handlers,
1618 shut_down_emacs (sig
, no_x
, stuff
)
1622 /* Prevent running of hooks from now on. */
1625 /* If we are controlling the terminal, reset terminal modes */
1626 #ifdef EMACS_HAVE_TTY_PGRP
1628 int pgrp
= EMACS_GETPGRP (0);
1631 if (EMACS_GET_TTY_PGRP (0, &tpgrp
) != -1
1636 if (sig
&& sig
!= SIGTERM
)
1637 fprintf (stderr
, "Fatal error (%d).", sig
);
1645 stuff_buffered_input (stuff
);
1647 kill_buffer_processes (Qnil
);
1648 Fdo_auto_save (Qt
, Qnil
);
1650 #ifdef CLASH_DETECTION
1651 unlock_all_files ();
1655 kill_vms_processes ();
1658 #if 0 /* This triggers a bug in XCloseDisplay and is not needed. */
1659 #ifdef HAVE_X_WINDOWS
1660 /* It's not safe to call intern here. Maybe we are crashing. */
1661 if (!noninteractive
&& SYMBOLP (Vwindow_system
)
1662 && XSYMBOL (Vwindow_system
)->name
->size
== 1
1663 && XSYMBOL (Vwindow_system
)->name
->data
[0] == 'x'
1665 Fx_close_current_connection ();
1666 #endif /* HAVE_X_WINDOWS */
1670 /* There is a tendency for a SIGIO signal to arrive within exit,
1671 and cause a SIGHUP because the input descriptor is already closed. */
1673 signal (SIGIO
, SIG_IGN
);
1691 DEFUN ("dump-emacs-data", Fdump_emacs_data
, Sdump_emacs_data
, 1, 1, 0,
1692 "Dump current state of Emacs into data file FILENAME.\n\
1693 This function exists on systems that use HAVE_SHM.")
1695 Lisp_Object filename
;
1697 extern char my_edata
[];
1700 CHECK_STRING (filename
, 0);
1701 filename
= Fexpand_file_name (filename
, Qnil
);
1704 Vpurify_flag
= Qnil
;
1707 /* Tell malloc where start of impure now is */
1708 /* Also arrange for warnings when nearly out of space. */
1709 #ifndef SYSTEM_MALLOC
1710 memory_warnings (my_edata
, malloc_warning
);
1712 map_out_data (XSTRING (filename
)->data
);
1719 #else /* not HAVE_SHM */
1721 DEFUN ("dump-emacs", Fdump_emacs
, Sdump_emacs
, 2, 2, 0,
1722 "Dump current state of Emacs into executable file FILENAME.\n\
1723 Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\
1724 This is used in the file `loadup.el' when building Emacs.\n\
1726 You must run Emacs in batch mode in order to dump it.")
1728 Lisp_Object filename
, symfile
;
1730 extern char my_edata
[];
1733 int count
= specpdl_ptr
- specpdl
;
1735 if (! noninteractive
)
1736 error ("Dumping Emacs works only in batch mode");
1738 /* Bind `command-line-processed' to nil before dumping,
1739 so that the dumped Emacs will process its command line
1740 and set up to work with X windows if appropriate. */
1741 symbol
= intern ("command-line-process");
1742 specbind (symbol
, Qnil
);
1744 CHECK_STRING (filename
, 0);
1745 filename
= Fexpand_file_name (filename
, Qnil
);
1746 if (!NILP (symfile
))
1748 CHECK_STRING (symfile
, 0);
1749 if (XSTRING (symfile
)->size
)
1750 symfile
= Fexpand_file_name (symfile
, Qnil
);
1754 Vpurify_flag
= Qnil
;
1757 set_time_zone_rule (dump_tz
);
1758 #ifndef LOCALTIME_CACHE
1759 /* Force a tz reload, since set_time_zone_rule doesn't. */
1766 mapout_data (XSTRING (filename
)->data
);
1768 /* Tell malloc where start of impure now is */
1769 /* Also arrange for warnings when nearly out of space. */
1770 #ifndef SYSTEM_MALLOC
1772 /* On Windows, this was done before dumping, and that once suffices.
1773 Meanwhile, my_edata is not valid on Windows. */
1774 memory_warnings (my_edata
, malloc_warning
);
1775 #endif /* not WINDOWSNT */
1777 #ifdef DOUG_LEA_MALLOC
1778 malloc_state_ptr
= malloc_get_state ();
1780 unexec (XSTRING (filename
)->data
,
1781 !NILP (symfile
) ? XSTRING (symfile
)->data
: 0, my_edata
, 0, 0);
1782 #ifdef DOUG_LEA_MALLOC
1783 free (malloc_state_ptr
);
1785 #endif /* not VMS */
1789 return unbind_to (count
, Qnil
);
1792 #endif /* not HAVE_SHM */
1794 #endif /* not CANNOT_DUMP */
1801 decode_env_path (evarname
, defalt
)
1802 char *evarname
, *defalt
;
1804 register char *path
, *p
;
1805 Lisp_Object lpath
, element
, tem
;
1807 /* It's okay to use getenv here, because this function is only used
1808 to initialize variables when Emacs starts up, and isn't called
1811 path
= (char *) getenv (evarname
);
1817 /* Ensure values from the environment use the proper directory separator. */
1820 p
= alloca (strlen (path
) + 1);
1824 if ('/' == DIRECTORY_SEP
)
1825 dostounix_filename (path
);
1827 unixtodos_filename (path
);
1833 p
= index (path
, SEPCHAR
);
1834 if (!p
) p
= path
+ strlen (path
);
1835 element
= (p
- path
? make_string (path
, p
- path
)
1836 : build_string ("."));
1838 /* Add /: to the front of the name
1839 if it would otherwise be treated as magic. */
1840 tem
= Ffind_file_name_handler (element
, Qt
);
1842 element
= concat2 (build_string ("/:"), element
);
1844 lpath
= Fcons (element
, lpath
);
1850 return Fnreverse (lpath
);
1856 Qfile_name_handler_alist
= intern ("file-name-handler-alist");
1857 staticpro (&Qfile_name_handler_alist
);
1861 defsubr (&Sdump_emacs_data
);
1863 defsubr (&Sdump_emacs
);
1867 defsubr (&Skill_emacs
);
1869 defsubr (&Sinvocation_name
);
1870 defsubr (&Sinvocation_directory
);
1872 DEFVAR_LISP ("command-line-args", &Vcommand_line_args
,
1873 "Args passed by shell to Emacs, as a list of strings.");
1875 DEFVAR_LISP ("system-type", &Vsystem_type
,
1876 "Value is symbol indicating type of operating system you are using.");
1877 Vsystem_type
= intern (SYSTEM_TYPE
);
1879 DEFVAR_LISP ("system-configuration", &Vsystem_configuration
,
1880 "Value is string indicating configuration Emacs was built for.");
1881 Vsystem_configuration
= build_string (EMACS_CONFIGURATION
);
1883 DEFVAR_LISP ("system-configuration-options", &Vsystem_configuration_options
,
1884 "String containing the configuration options Emacs was built with.");
1885 Vsystem_configuration_options
= build_string (EMACS_CONFIG_OPTIONS
);
1887 DEFVAR_BOOL ("noninteractive", &noninteractive1
,
1888 "Non-nil means Emacs is running without interactive terminal.");
1890 DEFVAR_LISP ("kill-emacs-hook", &Vkill_emacs_hook
,
1891 "Hook to be run whenever kill-emacs is called.\n\
1892 Since kill-emacs may be invoked when the terminal is disconnected (or\n\
1893 in other similar situations), functions placed on this hook should not\n\
1894 expect to be able to interact with the user. To ask for confirmation,\n\
1895 see `kill-emacs-query-functions' instead.");
1896 Vkill_emacs_hook
= Qnil
;
1899 DEFVAR_LISP ("signal-USR1-hook", &Vsignal_USR1_hook
,
1900 "Hook to be run whenever emacs receives a USR1 signal");
1901 Vsignal_USR1_hook
= Qnil
;
1903 DEFVAR_LISP ("signal-USR2-hook", &Vsignal_USR2_hook
,
1904 "Hook to be run whenever emacs receives a USR2 signal");
1905 Vsignal_USR2_hook
= Qnil
;
1910 DEFVAR_INT ("emacs-priority", &emacs_priority
,
1911 "Priority for Emacs to run at.\n\
1912 This value is effective only if set before Emacs is dumped,\n\
1913 and only if the Emacs executable is installed with setuid to permit\n\
1914 it to change priority. (Emacs sets its uid back to the real uid.)\n\
1915 Currently, you need to define SET_EMACS_PRIORITY in `config.h'\n\
1916 before you compile Emacs, to enable the code for this feature.");
1919 DEFVAR_LISP ("path-separator", &Vpath_separator
,
1920 "The directory separator in search paths, as a string.");
1923 Vpath_separator
= make_string (&c
, 1);
1926 DEFVAR_LISP ("invocation-name", &Vinvocation_name
,
1927 "The program name that was used to run Emacs.\n\
1928 Any directory names are omitted.");
1930 DEFVAR_LISP ("invocation-directory", &Vinvocation_directory
,
1931 "The directory in which the Emacs executable was found, to run it.\n\
1932 The value is nil if that directory's name is not known.");
1934 DEFVAR_LISP ("installation-directory", &Vinstallation_directory
,
1935 "A directory within which to look for the `lib-src' and `etc' directories.\n\
1936 This is non-nil when we can't find those directories in their standard\n\
1937 installed locations, but we can find them\n\
1938 near where the Emacs executable was found.");
1939 Vinstallation_directory
= Qnil
;