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"
48 #include "termhooks.h"
53 #include <sys/resource.h>
60 extern void malloc_warning ();
61 extern void set_time_zone_rule ();
62 extern char *index ();
63 extern char *strerror ();
65 /* Command line args from shell, as list of strings */
66 Lisp_Object Vcommand_line_args
;
68 /* The name under which Emacs was invoked, with any leading directory
70 Lisp_Object Vinvocation_name
;
72 /* The directory name from which Emacs was invoked. */
73 Lisp_Object Vinvocation_directory
;
75 /* The directory name in which to find subdirs such as lisp and etc.
76 nil means get them only from PATH_LOADSEARCH. */
77 Lisp_Object Vinstallation_directory
;
79 /* Hook run by `kill-emacs' before it does really anything. */
80 Lisp_Object Vkill_emacs_hook
;
83 /* Hooks for signal USR1 and USR2 handing */
84 Lisp_Object Vsignal_USR1_hook
;
86 Lisp_Object Vsignal_USR2_hook
;
90 /* Search path separator. */
91 Lisp_Object Vpath_separator
;
93 /* Set nonzero after Emacs has started up the first time.
94 Prevents reinitialization of the Lisp world and keymaps
95 on subsequent starts. */
98 #ifdef DOUG_LEA_MALLOC
99 /* Preserves a pointer to the memory allocated that copies that
100 static data inside glibc's malloc. */
101 void *malloc_state_ptr
;
102 /* From glibc, a routine that returns a copy of the malloc internal state. */
103 extern void *malloc_get_state ();
104 /* From glibc, a routine that overwrites the malloc internal state. */
105 extern void malloc_set_state ();
106 /* Non-zero if the MALLOC_CHECK_ enviroment variable was set while
107 dumping. Used to work around a bug in glibc's malloc. */
108 int malloc_using_checking
;
111 /* Variable whose value is symbol giving operating system type. */
112 Lisp_Object Vsystem_type
;
114 /* Variable whose value is string giving configuration built for. */
115 Lisp_Object Vsystem_configuration
;
117 /* Variable whose value is string giving configuration options,
118 for use when reporting bugs. */
119 Lisp_Object Vsystem_configuration_options
;
121 Lisp_Object Qfile_name_handler_alist
;
123 /* If non-zero, emacs should not attempt to use an window-specific code,
124 but instead should use the virtual terminal under which it was started */
125 int inhibit_window_system
;
127 /* If nonzero, set Emacs to run at this priority. This is also used
128 in child_setup and sys_suspend to make sure subshells run at normal
129 priority; Those functions have their own extern declaration. */
132 /* If non-zero a filter or a sentinel is running. Tested to save the match
133 data on the first attempt to change it inside asynchronous code. */
134 int running_asynch_code
;
138 extern int inherited_pgroup
;
141 #ifdef HAVE_X_WINDOWS
142 /* If non-zero, -d was specified, meaning we're using some window system. */
146 /* An address near the bottom of the stack.
147 Tells GC how to save a copy of the stack. */
150 #ifdef HAVE_WINDOW_SYSTEM
151 extern Lisp_Object Vwindow_system
;
152 #endif /* HAVE_WINDOW_SYSTEM */
154 extern Lisp_Object Vauto_save_list_file_name
;
156 #ifdef USG_SHARED_LIBRARIES
157 /* If nonzero, this is the place to put the end of the writable segment
160 unsigned int bss_end
= 0;
163 /* Nonzero means running Emacs without interactive terminal. */
167 /* Value of Lisp variable `noninteractive'.
168 Normally same as C variable `noninteractive'
169 but nothing terrible happens if user sets this one. */
173 /* Save argv and argc. */
177 static void sort_args ();
178 void syms_of_emacs ();
180 /* Signal code for the fatal signal that was received */
181 int fatal_error_code
;
183 /* Nonzero if handling a fatal error already */
184 int fatal_error_in_progress
;
188 handle_USR1_signal (sig
)
191 struct input_event buf
;
193 buf
.kind
= user_signal
;
195 buf
.frame_or_window
= Fselected_frame ();
199 kbd_buffer_store_event (&buf
);
205 handle_USR2_signal (sig
)
208 struct input_event buf
;
210 buf
.kind
= user_signal
;
212 buf
.frame_or_window
= Fselected_frame ();
216 kbd_buffer_store_event (&buf
);
220 /* Handle bus errors, illegal instruction, etc. */
222 fatal_error_signal (sig
)
225 fatal_error_code
= sig
;
226 signal (sig
, SIG_DFL
);
228 TOTALLY_UNBLOCK_INPUT
;
230 /* If fatal error occurs in code below, avoid infinite recursion. */
231 if (! fatal_error_in_progress
)
233 fatal_error_in_progress
= 1;
235 shut_down_emacs (sig
, 0, Qnil
);
239 LIB$
STOP (SS$_ABORT
);
241 /* Signal the same code; this time it will really be fatal.
242 Remember that since we're in a signal handler, the signal we're
243 going to send is probably blocked, so we have to unblock it if we
244 want to really receive it. */
246 sigunblock (sigmask (fatal_error_code
));
248 kill (getpid (), fatal_error_code
);
254 /* Handler for SIGDANGER. */
256 memory_warning_signal (sig
)
259 signal (sig
, memory_warning_signal
);
261 malloc_warning ("Operating system warns that virtual memory is running low.\n");
263 /* It might be unsafe to call do_auto_save now. */
264 force_auto_save_soon ();
268 /* We define abort, rather than using it from the library,
269 so that GDB can return from a breakpoint here.
270 MSDOS has its own definition on msdos.c */
272 #if ! defined (DOS_NT) && ! defined (NO_ABORT)
276 kill (getpid (), SIGABRT
);
277 /* This shouldn't be executed, but it prevents a warning. */
283 /* Code for dealing with Lisp access to the Unix command line */
286 init_cmdargs (argc
, argv
, skip_args
)
292 Lisp_Object name
, dir
, tem
;
293 int count
= specpdl_ptr
- specpdl
;
294 Lisp_Object raw_name
;
299 raw_name
= build_string (argv
[0]);
301 /* Add /: to the front of the name
302 if it would otherwise be treated as magic. */
303 tem
= Ffind_file_name_handler (raw_name
, Qt
);
305 raw_name
= concat2 (build_string ("/:"), raw_name
);
307 Vinvocation_name
= Ffile_name_nondirectory (raw_name
);
308 Vinvocation_directory
= Ffile_name_directory (raw_name
);
310 /* If we got no directory in argv[0], search PATH to find where
311 Emacs actually came from. */
312 if (NILP (Vinvocation_directory
))
315 int yes
= openp (Vexec_path
, Vinvocation_name
,
316 EXEC_SUFFIXES
, &found
, 1);
319 /* Add /: to the front of the name
320 if it would otherwise be treated as magic. */
321 tem
= Ffind_file_name_handler (found
, Qt
);
323 found
= concat2 (build_string ("/:"), found
);
324 Vinvocation_directory
= Ffile_name_directory (found
);
328 if (!NILP (Vinvocation_directory
)
329 && NILP (Ffile_name_absolute_p (Vinvocation_directory
)))
330 /* Emacs was started with relative path, like ./emacs.
332 Vinvocation_directory
= Fexpand_file_name (Vinvocation_directory
, Qnil
);
334 Vinstallation_directory
= Qnil
;
336 if (!NILP (Vinvocation_directory
))
338 dir
= Vinvocation_directory
;
339 name
= Fexpand_file_name (Vinvocation_name
, dir
);
342 Lisp_Object tem
, lib_src_exists
;
343 Lisp_Object etc_exists
, info_exists
;
345 /* See if dir contains subdirs for use by Emacs.
346 Check for the ones that would exist in a build directory,
347 not including lisp and info. */
348 tem
= Fexpand_file_name (build_string ("lib-src"), dir
);
349 lib_src_exists
= Ffile_exists_p (tem
);
352 /* MSDOS installations frequently remove lib-src, but we still
353 must set installation-directory, or else info won't find
354 its files (it uses the value of installation-directory). */
355 tem
= Fexpand_file_name (build_string ("info"), dir
);
356 info_exists
= Ffile_exists_p (tem
);
361 if (!NILP (lib_src_exists
) || !NILP (info_exists
))
363 tem
= Fexpand_file_name (build_string ("etc"), dir
);
364 etc_exists
= Ffile_exists_p (tem
);
365 if (!NILP (etc_exists
))
367 Vinstallation_directory
368 = Ffile_name_as_directory (dir
);
373 /* See if dir's parent contains those subdirs. */
374 tem
= Fexpand_file_name (build_string ("../lib-src"), dir
);
375 lib_src_exists
= Ffile_exists_p (tem
);
379 /* See the MSDOS commentary above. */
380 tem
= Fexpand_file_name (build_string ("../info"), dir
);
381 info_exists
= Ffile_exists_p (tem
);
386 if (!NILP (lib_src_exists
) || !NILP (info_exists
))
388 tem
= Fexpand_file_name (build_string ("../etc"), dir
);
389 etc_exists
= Ffile_exists_p (tem
);
390 if (!NILP (etc_exists
))
392 tem
= Fexpand_file_name (build_string (".."), dir
);
393 Vinstallation_directory
394 = Ffile_name_as_directory (tem
);
399 /* If the Emacs executable is actually a link,
400 next try the dir that the link points into. */
401 tem
= Ffile_symlink_p (name
);
404 name
= Fexpand_file_name (tem
, dir
);
405 dir
= Ffile_name_directory (name
);
412 Vcommand_line_args
= Qnil
;
414 for (i
= argc
- 1; i
>= 0; i
--)
416 if (i
== 0 || i
> skip_args
)
418 = Fcons (build_string (argv
[i
]), Vcommand_line_args
);
421 unbind_to (count
, Qnil
);
424 DEFUN ("invocation-name", Finvocation_name
, Sinvocation_name
, 0, 0, 0,
425 "Return the program name that was used to run Emacs.\n\
426 Any directory names are omitted.")
429 return Fcopy_sequence (Vinvocation_name
);
432 DEFUN ("invocation-directory", Finvocation_directory
, Sinvocation_directory
,
434 "Return the directory name in which the Emacs executable was located")
437 return Fcopy_sequence (Vinvocation_directory
);
442 #ifdef LINK_CRTL_SHARE
443 #ifdef SHARABLE_LIB_BUG
444 extern noshare
char **environ
;
445 #endif /* SHARABLE_LIB_BUG */
446 #endif /* LINK_CRTL_SHARE */
450 /* A valid but unlikely value for the TZ environment value.
451 It is OK (though a bit slower) if the user actually chooses this value. */
452 static char dump_tz
[] = "UtC0";
455 #ifndef ORDINARY_LINK
456 /* We don't include crtbegin.o and crtend.o in the link,
457 so these functions and variables might be missed.
458 Provide dummy definitions to avoid error.
459 (We don't have any real constructors or destructors.) */
461 #ifndef GCC_CTORS_IN_LIBC
462 void __do_global_ctors ()
464 void __do_global_ctors_aux ()
466 void __do_global_dtors ()
468 /* Linux has a bug in its library; avoid an error. */
470 char * __CTOR_LIST__
[2] = { (char *) (-1), 0 };
472 char * __DTOR_LIST__
[2] = { (char *) (-1), 0 };
473 #endif /* GCC_CTORS_IN_LIBC */
476 #endif /* __GNUC__ */
477 #endif /* ORDINARY_LINK */
479 /* Test whether the next argument in ARGV matches SSTR or a prefix of
480 LSTR (at least MINLEN characters). If so, then if VALPTR is non-null
481 (the argument is supposed to have a value) store in *VALPTR either
482 the next argument or the portion of this one after the equal sign.
483 ARGV is read starting at position *SKIPPTR; this index is advanced
484 by the number of arguments used.
486 Too bad we can't just use getopt for all of this, but we don't have
487 enough information to do it right. */
490 argmatch (argv
, argc
, sstr
, lstr
, minlen
, valptr
, skipptr
)
503 /* Don't access argv[argc]; give up in advance. */
504 if (argc
<= *skipptr
+ 1)
507 arg
= argv
[*skipptr
+1];
510 if (strcmp (arg
, sstr
) == 0)
514 *valptr
= argv
[*skipptr
+2];
521 arglen
= (valptr
!= NULL
&& (p
= index (arg
, '=')) != NULL
522 ? p
- arg
: strlen (arg
));
523 if (lstr
== 0 || arglen
< minlen
|| strncmp (arg
, lstr
, arglen
) != 0)
525 else if (valptr
== NULL
)
536 else if (argv
[*skipptr
+2] != NULL
)
538 *valptr
= argv
[*skipptr
+2];
550 main (argc
, argv
, envp
)
555 char stack_bottom_variable
;
559 #ifdef HAVE_SETRLIMIT
564 #ifdef LINUX_SBRK_BUG
568 #ifdef DOUG_LEA_MALLOC
571 if (!malloc_using_checking
)
572 /* Work around a bug in glibc's malloc. MALLOC_CHECK_ must be
573 ignored if the heap to be restored was constructed without
575 unsetenv ("MALLOC_CHECK_");
576 malloc_set_state (malloc_state_ptr
);
577 free (malloc_state_ptr
);
580 malloc_using_checking
= getenv ("MALLOC_CHECK_") != NULL
;
583 #ifdef RUN_TIME_REMAP
585 run_time_remap (argv
[0]);
588 sort_args (argc
, argv
);
590 while (argv
[argc
]) argc
++;
592 if (argmatch (argv
, argc
, "-version", "--version", 3, NULL
, &skip_args
)
593 /* We don't know the version number unless this is a dumped Emacs.
594 So ignore --version otherwise. */
598 tem
= Fsymbol_value (intern ("emacs-version"));
601 fprintf (stderr
, "Invalid value of `emacs-version'\n");
606 printf ("GNU Emacs %s\n", XSTRING (tem
)->data
);
607 printf ("Copyright (C) 1999 Free Software Foundation, Inc.\n");
608 printf ("GNU Emacs comes with ABSOLUTELY NO WARRANTY.\n");
609 printf ("You may redistribute copies of Emacs\n");
610 printf ("under the terms of the GNU General Public License.\n");
611 printf ("For more information about these matters, ");
612 printf ("see the file named COPYING.\n");
617 /* Map in shared memory, if we are using that. */
619 if (argmatch (argv
, argc
, "-nl", "--no-shared-memory", 6, NULL
, &skip_args
))
622 /* The shared memory was just restored, which clobbered this. */
628 /* The shared memory was just restored, which clobbered this. */
635 extern int malloc_cookie
;
636 /* This helps out unexnext.c. */
638 if (malloc_jumpstart (malloc_cookie
) != 0)
639 printf ("malloc jumpstart failed!\n");
644 /* If -map specified, map the data file in */
647 if (argmatch (argv
, argc
, "-map", "--map-data", 3, &mapin_file
, &skip_args
))
651 #ifdef LINK_CRTL_SHARE
652 #ifdef SHARABLE_LIB_BUG
653 /* Bletcherous shared libraries! */
655 stdin
= fdopen (0, "r");
657 stdout
= fdopen (1, "w");
659 stderr
= fdopen (2, "w");
662 #endif /* SHARABLE_LIB_BUG */
663 #endif /* LINK_CRTL_SHARE */
666 #if defined (HAVE_SETRLIMIT) && defined (RLIMIT_STACK)
667 /* Extend the stack space available.
668 Don't do that if dumping, since some systems (e.g. DJGPP)
669 might define a smaller stack limit at that time. */
672 && (!noninteractive
|| initialized
)
674 && !getrlimit (RLIMIT_STACK
, &rlim
))
677 extern int re_max_failures
;
678 /* Approximate the amount regex.c needs per unit of re_max_failures. */
679 int ratio
= 20 * sizeof (char *);
680 /* Then add 33% to cover the size of the smaller stacks that regex.c
681 successively allocates and discards, on its way to the maximum. */
683 /* Add in some extra to cover
684 what we're likely to use for other reasons. */
685 newlim
= re_max_failures
* ratio
+ 200000;
687 /* NetBSD (at least NetBSD 1.2G and former) has a bug in its
688 stack allocation routine for new process that the allocation
689 fails if stack limit is not on page boundary. So, round up the
690 new limit to page boundary. */
691 newlim
= (newlim
+ getpagesize () - 1) / getpagesize () * getpagesize();
693 if (newlim
> rlim
.rlim_max
)
695 newlim
= rlim
.rlim_max
;
696 /* Don't let regex.c overflow the stack we have. */
697 re_max_failures
= (newlim
- 200000) / ratio
;
699 if (rlim
.rlim_cur
< newlim
)
700 rlim
.rlim_cur
= newlim
;
702 setrlimit (RLIMIT_STACK
, &rlim
);
704 #endif /* HAVE_SETRLIMIT and RLIMIT_STACK */
706 /* Record (approximately) where the stack begins. */
707 stack_bottom
= &stack_bottom_variable
;
709 #ifdef USG_SHARED_LIBRARIES
711 brk ((void *)bss_end
);
716 #ifndef SYSTEM_MALLOC
717 /* Arrange to get warning messages as memory fills up. */
718 memory_warnings (0, malloc_warning
);
720 /* Call malloc at least once, to run the initial __malloc_hook.
721 Also call realloc and free for consistency. */
722 free (realloc (malloc (4), 4));
724 /* Arrange to disable interrupt input inside malloc etc. */
725 uninterrupt_malloc ();
726 #endif /* not SYSTEM_MALLOC */
729 /* We do all file input/output as binary files. When we need to translate
730 newlines, we do that manually. */
734 if (!isatty (fileno (stdin
)))
735 setmode (fileno (stdin
), O_BINARY
);
736 if (!isatty (fileno (stdout
)))
739 setmode (fileno (stdout
), O_BINARY
);
741 #else /* not __DJGPP__ >= 2 */
742 (stdin
)->_flag
&= ~_IOTEXT
;
743 (stdout
)->_flag
&= ~_IOTEXT
;
744 (stderr
)->_flag
&= ~_IOTEXT
;
745 #endif /* not __DJGPP__ >= 2 */
748 #ifdef SET_EMACS_PRIORITY
750 nice (emacs_priority
);
752 #endif /* SET_EMACS_PRIORITY */
754 #ifdef EXTRA_INITIALIZE
758 inhibit_window_system
= 0;
760 /* Handle the -t switch, which specifies filename to use as terminal */
764 if (argmatch (argv
, argc
, "-t", "--terminal", 4, &term
, &skip_args
))
769 result
= open (term
, O_RDWR
, 2 );
772 char *errstring
= strerror (errno
);
773 fprintf (stderr
, "emacs: %s: %s\n", term
, errstring
);
779 fprintf (stderr
, "emacs: %s: not a tty\n", term
);
782 fprintf (stderr
, "Using %s\n", term
);
783 #ifdef HAVE_WINDOW_SYSTEM
784 inhibit_window_system
= 1; /* -t => -nw */
791 if (argmatch (argv
, argc
, "-nw", "--no-windows", 6, NULL
, &skip_args
))
792 inhibit_window_system
= 1;
794 /* Handle the -batch switch, which means don't do interactive display. */
796 if (argmatch (argv
, argc
, "-batch", "--batch", 5, NULL
, &skip_args
))
799 /* Handle the --help option, which gives a usage message.. */
800 if (argmatch (argv
, argc
, "-help", "--help", 3, NULL
, &skip_args
))
803 Usage: %s [--batch] [-t term] [--terminal term]\n\
804 [-d display] [--display display] [-nw] [--no-windows]\n\
805 [-q] [--no-init-file] [-u user] [--user user] [--debug-init]\n\
806 [--unibyte] [--multibyte] [--version] [--no-site-file]\n\
807 [-f func] [--funcall func] [-l file] [--load file] [--eval expr]\n\
808 [--insert file] [+linenum] file-to-visit [--kill]\n\
809 Report bugs to bug-gnu-emacs@gnu.org. First, please see\n\
810 the Bugs section of the Emacs manual or the file BUGS.\n", argv
[0]);
814 if (! noninteractive
)
819 inherited_pgroup
= EMACS_GETPGRP (0);
820 setpgrp (0, getpid ());
823 #if defined (USG5) && defined (INTERRUPT_INPUT)
833 /* Don't catch SIGHUP if dumping. */
840 sigblock (sigmask (SIGHUP
));
841 /* In --batch mode, don't catch SIGHUP if already ignored.
842 That makes nohup work. */
844 || signal (SIGHUP
, SIG_IGN
) != SIG_IGN
)
845 signal (SIGHUP
, fatal_error_signal
);
846 sigunblock (sigmask (SIGHUP
));
851 ! noninteractive
|| initialized
857 /* Don't catch these signals in batch mode if dumping.
858 On some machines, this sets static data that would make
859 signal fail to work right when the dumped Emacs is run. */
860 signal (SIGQUIT
, fatal_error_signal
);
861 signal (SIGILL
, fatal_error_signal
);
862 signal (SIGTRAP
, fatal_error_signal
);
864 signal (SIGUSR1
, handle_USR1_signal
);
866 signal (SIGUSR2
, handle_USR2_signal
);
870 signal (SIGABRT
, fatal_error_signal
);
873 signal (SIGHWE
, fatal_error_signal
);
876 signal (SIGPRE
, fatal_error_signal
);
879 signal (SIGORE
, fatal_error_signal
);
882 signal (SIGUME
, fatal_error_signal
);
885 signal (SIGDLK
, fatal_error_signal
);
888 signal (SIGCPULIM
, fatal_error_signal
);
891 /* This is missing on some systems - OS/2, for example. */
892 signal (SIGIOT
, fatal_error_signal
);
895 signal (SIGEMT
, fatal_error_signal
);
897 signal (SIGFPE
, fatal_error_signal
);
899 signal (SIGBUS
, fatal_error_signal
);
901 signal (SIGSEGV
, fatal_error_signal
);
903 signal (SIGSYS
, fatal_error_signal
);
905 signal (SIGTERM
, fatal_error_signal
);
907 signal (SIGXCPU
, fatal_error_signal
);
910 signal (SIGXFSZ
, fatal_error_signal
);
914 /* This just means available memory is getting low. */
915 signal (SIGDANGER
, memory_warning_signal
);
919 /* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU. */
920 signal (SIGXCPU
, fatal_error_signal
);
922 signal (SIGIOINT
, fatal_error_signal
);
924 signal (SIGGRANT
, fatal_error_signal
);
925 signal (SIGRETRACT
, fatal_error_signal
);
926 signal (SIGSOUND
, fatal_error_signal
);
927 signal (SIGMSG
, fatal_error_signal
);
931 noninteractive1
= noninteractive
;
933 /* Perform basic initializations (not merely interning symbols) */
940 init_charset_once ();
942 init_syntax_once (); /* Create standard syntax table. */
943 init_category_once (); /* Create standard category table. */
944 /* Must be done before init_buffer */
945 init_casetab_once ();
946 init_buffer_once (); /* Create buffer table and some buffers */
947 init_minibuf_once (); /* Create list of minibuffers */
948 /* Must precede init_window_once */
949 init_window_once (); /* Init the window system */
950 init_fileio_once (); /* Must precede any path manipulation. */
957 running_asynch_code
= 0;
959 /* Handle --unibyte and the EMACS_UNIBYTE envvar,
960 but not while dumping. */
963 ! noninteractive
|| initialized
969 int inhibit_unibyte
= 0;
971 /* --multibyte overrides EMACS_UNIBYTE. */
972 if (argmatch (argv
, argc
, "-no-unibyte", "--no-unibyte", 4, NULL
, &skip_args
)
973 || argmatch (argv
, argc
, "-multibyte", "--multibyte", 4, NULL
, &skip_args
))
976 /* --unibyte requests that we set up to do everything with single-byte
977 buffers and strings. We need to handle this before calling
978 init_lread, init_editfns and other places that generate Lisp strings
979 from text in the environment. */
980 /* Actually this shouldn't be needed as of 20.4 in a generally
981 unibyte environment. As handa says, environment values
982 aren't now decoded; also existing buffers are now made
983 unibyte during startup if .emacs sets unibyte. Tested with
984 8-bit data in environment variables and /etc/passwd, setting
985 unibyte and Latin-1 in .emacs. -- Dave Love */
986 if (argmatch (argv
, argc
, "-unibyte", "--unibyte", 4, NULL
, &skip_args
)
987 || argmatch (argv
, argc
, "-no-multibyte", "--no-multibyte", 4, NULL
, &skip_args
)
988 || (getenv ("EMACS_UNIBYTE") && !inhibit_unibyte
))
990 Lisp_Object old_log_max
;
991 Lisp_Object symbol
, tail
;
993 symbol
= intern ("default-enable-multibyte-characters");
998 /* Erase pre-dump messages in *Messages* now so no abort. */
999 old_log_max
= Vmessage_log_max
;
1000 XSETFASTINT (Vmessage_log_max
, 0);
1001 message_dolog ("", 0, 1, 0);
1002 Vmessage_log_max
= old_log_max
;
1005 for (tail
= Vbuffer_alist
; CONSP (tail
);
1006 tail
= XCONS (tail
)->cdr
)
1010 buffer
= Fcdr (XCONS (tail
)->car
);
1011 /* Verify that all buffers are empty now, as they
1013 if (BUF_Z (XBUFFER (buffer
)) > BUF_BEG (XBUFFER (buffer
)))
1015 /* It is safe to do this crudely in an empty buffer. */
1016 XBUFFER (buffer
)->enable_multibyte_characters
= Qnil
;
1022 = !argmatch (argv
, argc
, "-nl", "--no-loadup", 6, NULL
, &skip_args
);
1025 #ifdef HAVE_X_WINDOWS
1026 /* Stupid kludge to catch command-line display spec. We can't
1027 handle this argument entirely in window system dependent code
1028 because we don't even know which window system dependent code
1029 to run until we've recognized this argument. */
1031 char *displayname
= 0;
1033 int count_before
= skip_args
;
1035 /* Skip any number of -d options, but only use the last one. */
1038 int count_before_this
= skip_args
;
1040 if (argmatch (argv
, argc
, "-d", "--display", 3, &displayname
, &skip_args
))
1042 else if (argmatch (argv
, argc
, "-display", 0, 3, &displayname
, &skip_args
))
1047 count_before
= count_before_this
;
1050 /* If we have the form --display=NAME,
1051 convert it into -d name.
1052 This requires inserting a new element into argv. */
1053 if (displayname
!= 0 && skip_args
- count_before
== 1)
1055 char **new = (char **) xmalloc (sizeof (char *) * (argc
+ 2));
1058 for (j
= 0; j
< count_before
+ 1; j
++)
1060 new[count_before
+ 1] = "-d";
1061 new[count_before
+ 2] = displayname
;
1062 for (j
= count_before
+ 2; j
<argc
; j
++)
1063 new[j
+ 1] = argv
[j
];
1067 /* Change --display to -d, when its arg is separate. */
1068 else if (displayname
!= 0 && skip_args
> count_before
1069 && argv
[count_before
+ 1][1] == '-')
1070 argv
[count_before
+ 1] = "-d";
1072 /* Don't actually discard this arg. */
1073 skip_args
= count_before
;
1077 /* argmatch must not be used after here,
1078 except when bulding temacs
1079 because the -d argument has not been skipped in skip_args. */
1082 /* Call early 'cause init_environment needs it. */
1084 /* Set defaults for several environment variables. */
1086 init_environment (argc
, argv
, skip_args
);
1092 /* Initialize environment from registry settings. */
1093 init_environment (argv
);
1094 init_ntproc (); /* must precede init_editfns */
1097 /* egetenv is a pretty low-level facility, which may get called in
1098 many circumstances; it seems flimsy to put off initializing it
1099 until calling init_callproc. */
1100 set_process_environment ();
1101 /* AIX crashes are reported in system versions 3.2.3 and 3.2.4
1102 if this is not done. Do it after set_process_environment so that we
1103 don't pollute Vprocess_environment. */
1108 init_buffer (); /* Init default directory of main buffer */
1110 init_callproc_1 (); /* Must precede init_cmdargs and init_sys_modes. */
1111 init_cmdargs (argc
, argv
, skip_args
); /* Must precede init_lread. */
1115 /* Erase any pre-dump messages in the message log, to avoid confusion */
1116 Lisp_Object old_log_max
;
1117 old_log_max
= Vmessage_log_max
;
1118 XSETFASTINT (Vmessage_log_max
, 0);
1119 message_dolog ("", 0, 1, 0);
1120 Vmessage_log_max
= old_log_max
;
1123 init_callproc (); /* Must follow init_cmdargs but not init_sys_modes. */
1126 /* Intern the names of all standard functions and variables;
1127 define standard keys. */
1131 /* The basic levels of Lisp must come first */
1132 /* And data must come first of all
1133 for the sake of symbols like error-message */
1140 syms_of_floatfns ();
1144 syms_of_bytecode ();
1146 syms_of_casefiddle ();
1148 syms_of_callproc ();
1149 syms_of_category ();
1153 #ifndef NO_DIR_LIBRARY
1155 #endif /* not NO_DIR_LIBRARY */
1161 syms_of_coding (); /* This should be after syms_of_fileio. */
1162 #ifdef CLASH_DETECTION
1163 syms_of_filelock ();
1164 #endif /* CLASH_DETECTION */
1167 syms_of_keyboard ();
1172 syms_of_mocklisp ();
1180 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
1181 syms_of_textprop ();
1187 #endif /* WINDOWSNT */
1190 #ifdef HAVE_X_WINDOWS
1197 #endif /* HAVE_X_WINDOWS */
1207 syms_of_w32faces ();
1208 syms_of_w32select ();
1211 #endif /* HAVE_NTGUI */
1221 keys_of_casefiddle ();
1224 keys_of_keyboard ();
1232 if (!noninteractive
)
1235 init_vms_input ();/* init_display calls get_frame_size, that needs this */
1237 init_display (); /* Determine terminal type. init_sys_modes uses results */
1239 init_keyboard (); /* This too must precede init_sys_modes */
1241 init_vmsproc (); /* And this too. */
1243 init_sys_modes (); /* Init system terminal modes (RAW or CBREAK, etc.) */
1247 #ifdef LISP_FLOAT_TYPE
1258 /* Handle -l loadup, args passed by Makefile. */
1259 if (argmatch (argv
, argc
, "-l", "--load", 3, &file
, &skip_args
))
1260 Vtop_level
= Fcons (intern ("load"),
1261 Fcons (build_string (file
), Qnil
));
1263 /* Unless next switch is -nl, load "loadup.el" first thing. */
1265 Vtop_level
= Fcons (intern ("load"),
1266 Fcons (build_string ("loadup.el"), Qnil
));
1267 #endif /* CANNOT_DUMP */
1274 /* If the execution TZ happens to be the same as the dump TZ,
1275 change it to some other value and then change it back,
1276 to force the underlying implementation to reload the TZ info.
1277 This is needed on implementations that load TZ info from files,
1278 since the TZ file contents may differ between dump and execution. */
1279 char *tz
= getenv ("TZ");
1280 if (tz
&& !strcmp (tz
, dump_tz
))
1290 /* Gerd Moellmann <gerd@acm.org> says this makes profiling work on
1291 FreeBSD. It might work on some other systems too.
1292 Give it a try and tell me if it works on your system. */
1297 extern void _mcleanup ();
1299 extern Lisp_Object
Fredraw_frame ();
1301 /* This uses Fredraw_frame because that function
1302 comes first in the Emacs executable.
1303 It might be better to use something that gives
1304 the start of the text segment, but start_of_text
1305 is not defined on all systems now. */
1306 monstartup (Fredraw_frame
, &etext
);
1315 #ifdef LOCALTIME_CACHE
1316 /* Some versions of localtime have a bug. They cache the value of the time
1317 zone rather than looking it up every time. Since localtime() is
1318 called to bolt the undumping time into the undumped emacs, this
1319 results in localtime ignoring the TZ environment variable.
1320 This flushes the new TZ value into localtime. */
1322 #endif /* defined (LOCALTIME_CACHE) */
1324 /* Enter editor command loop. This never returns. */
1329 /* Sort the args so we can find the most important ones
1330 at the beginning of argv. */
1332 /* First, here's a table of all the standard options. */
1334 struct standard_args
1342 struct standard_args standard_args
[] =
1344 { "-version", "--version", 150, 0 },
1346 { "-nl", "--no-shared-memory", 140, 0 },
1349 { "-map", "--map-data", 130, 0 },
1351 { "-t", "--terminal", 120, 1 },
1352 { "-nw", "--no-windows", 110, 0 },
1353 { "-batch", "--batch", 100, 0 },
1354 { "-help", "--help", 90, 0 },
1355 { "-no-unibyte", "--no-unibyte", 83, 0 },
1356 { "-multibyte", "--multibyte", 82, 0 },
1357 { "-unibyte", "--unibyte", 81, 0 },
1358 { "-no-multibyte", "--no-multibyte", 80, 0 },
1360 { "-nl", "--no-loadup", 70, 0 },
1362 /* -d must come last before the options handled in startup.el. */
1363 { "-d", "--display", 60, 1 },
1364 { "-display", 0, 60, 1 },
1365 /* Now for the options handled in startup.el. */
1366 { "-q", "--no-init-file", 50, 0 },
1367 { "-no-init-file", 0, 50, 0 },
1368 { "-no-site-file", "--no-site-file", 40, 0 },
1369 { "-u", "--user", 30, 1 },
1370 { "-user", 0, 30, 1 },
1371 { "-debug-init", "--debug-init", 20, 0 },
1372 { "-i", "--icon-type", 15, 0 },
1373 { "-itype", 0, 15, 0 },
1374 { "-iconic", "--iconic", 15, 0 },
1375 { "-bg", "--background-color", 10, 1 },
1376 { "-background", 0, 10, 1 },
1377 { "-fg", "--foreground-color", 10, 1 },
1378 { "-foreground", 0, 10, 1 },
1379 { "-bd", "--border-color", 10, 1 },
1380 { "-bw", "--border-width", 10, 1 },
1381 { "-ib", "--internal-border", 10, 1 },
1382 { "-ms", "--mouse-color", 10, 1 },
1383 { "-cr", "--cursor-color", 10, 1 },
1384 { "-fn", "--font", 10, 1 },
1385 { "-font", 0, 10, 1 },
1386 { "-g", "--geometry", 10, 1 },
1387 { "-geometry", 0, 10, 1 },
1388 { "-T", "--title", 10, 1 },
1389 { "-title", 0, 10, 1 },
1390 { "-name", "--name", 10, 1 },
1391 { "-xrm", "--xrm", 10, 1 },
1392 { "-r", "--reverse-video", 5, 0 },
1394 { "-reverse", 0, 5, 0 },
1395 { "-hb", "--horizontal-scroll-bars", 5, 0 },
1396 { "-vb", "--vertical-scroll-bars", 5, 0 },
1397 /* These have the same priority as ordinary file name args,
1398 so they are not reordered with respect to those. */
1399 { "-L", "--directory", 0, 1 },
1400 { "-directory", 0, 0, 1 },
1401 { "-l", "--load", 0, 1 },
1402 { "-load", 0, 0, 1 },
1403 { "-f", "--funcall", 0, 1 },
1404 { "-funcall", 0, 0, 1 },
1405 { "-eval", "--eval", 0, 1 },
1406 { "-find-file", "--find-file", 0, 1 },
1407 { "-visit", "--visit", 0, 1 },
1408 { "-insert", "--insert", 0, 1 },
1409 /* This should be processed after ordinary file name args and the like. */
1410 { "-kill", "--kill", -10, 0 },
1413 /* Reorder the elements of ARGV (assumed to have ARGC elements)
1414 so that the highest priority ones come first.
1415 Do not change the order of elements of equal priority.
1416 If an option takes an argument, keep it and its argument together.
1418 If an option that takes no argument appears more
1419 than once, eliminate all but one copy of it. */
1422 sort_args (argc
, argv
)
1426 char **new = (char **) xmalloc (sizeof (char *) * argc
);
1427 /* For each element of argv,
1428 the corresponding element of options is:
1429 0 for an option that takes no arguments,
1430 1 for an option that takes one argument, etc.
1431 -1 for an ordinary non-option argument. */
1432 int *options
= (int *) xmalloc (sizeof (int) * argc
);
1433 int *priority
= (int *) xmalloc (sizeof (int) * argc
);
1435 int incoming_used
= 1;
1438 int end_of_options
= argc
;
1440 /* Categorize all the options,
1441 and figure out which argv elts are option arguments. */
1442 for (from
= 1; from
< argc
; from
++)
1446 if (argv
[from
][0] == '-')
1451 /* If we have found "--", don't consider
1452 any more arguments as options. */
1453 if (argv
[from
][1] == '-' && argv
[from
][2] == 0)
1455 /* Leave the "--", and everything following it, at the end. */
1456 for (; from
< argc
; from
++)
1458 priority
[from
] = -100;
1464 /* Look for a match with a known old-fashioned option. */
1465 for (i
= 0; i
< sizeof (standard_args
) / sizeof (standard_args
[0]); i
++)
1466 if (!strcmp (argv
[from
], standard_args
[i
].name
))
1468 options
[from
] = standard_args
[i
].nargs
;
1469 priority
[from
] = standard_args
[i
].priority
;
1470 if (from
+ standard_args
[i
].nargs
>= argc
)
1471 fatal ("Option `%s' requires an argument\n", argv
[from
]);
1472 from
+= standard_args
[i
].nargs
;
1476 /* Look for a match with a known long option.
1477 MATCH is -1 if no match so far, -2 if two or more matches so far,
1478 >= 0 (the table index of the match) if just one match so far. */
1479 if (argv
[from
][1] == '-')
1482 thislen
= strlen (argv
[from
]);
1483 equals
= index (argv
[from
], '=');
1485 thislen
= equals
- argv
[from
];
1488 i
< sizeof (standard_args
) / sizeof (standard_args
[0]); i
++)
1489 if (standard_args
[i
].longname
1490 && !strncmp (argv
[from
], standard_args
[i
].longname
,
1499 /* If we found exactly one match, use that. */
1502 options
[from
] = standard_args
[match
].nargs
;
1503 priority
[from
] = standard_args
[match
].priority
;
1504 /* If --OPTION=VALUE syntax is used,
1505 this option uses just one argv element. */
1508 if (from
+ options
[from
] >= argc
)
1509 fatal ("Option `%s' requires an argument\n", argv
[from
]);
1510 from
+= options
[from
];
1517 /* Copy the arguments, in order of decreasing priority, to NEW. */
1519 while (incoming_used
< argc
)
1522 int best_priority
= -9999;
1524 /* Find the highest priority remaining option.
1525 If several have equal priority, take the first of them. */
1526 for (from
= 1; from
< argc
; from
++)
1528 if (argv
[from
] != 0 && priority
[from
] > best_priority
)
1530 best_priority
= priority
[from
];
1533 /* Skip option arguments--they are tied to the options. */
1534 if (options
[from
] > 0)
1535 from
+= options
[from
];
1541 /* Copy the highest priority remaining option, with its args, to NEW.
1542 Unless it is a duplicate of the previous one. */
1543 if (! (options
[best
] == 0
1544 && ! strcmp (new[to
- 1], argv
[best
])))
1546 new[to
++] = argv
[best
];
1547 for (i
= 0; i
< options
[best
]; i
++)
1548 new[to
++] = argv
[best
+ i
+ 1];
1551 incoming_used
+= 1 + (options
[best
] > 0 ? options
[best
] : 0);
1553 /* Clear out this option in ARGV. */
1555 for (i
= 0; i
< options
[best
]; i
++)
1556 argv
[best
+ i
+ 1] = 0;
1559 /* If duplicate options were deleted, fill up extra space with null ptrs. */
1563 bcopy (new, argv
, sizeof (char *) * argc
);
1570 DEFUN ("kill-emacs", Fkill_emacs
, Skill_emacs
, 0, 1, "P",
1571 "Exit the Emacs job and kill it.\n\
1572 If ARG is an integer, return ARG as the exit program code.\n\
1573 If ARG is a string, stuff it as keyboard input.\n\n\
1574 The value of `kill-emacs-hook', if not void,\n\
1575 is a list of functions (of no args),\n\
1576 all of which are called before Emacs is actually killed.")
1580 Lisp_Object hook
, hook1
;
1582 struct gcpro gcpro1
;
1589 if (!NILP (Vrun_hooks
) && !noninteractive
)
1590 call1 (Vrun_hooks
, intern ("kill-emacs-hook"));
1594 /* Is it really necessary to do this deassign
1595 when we are going to exit anyway? */
1600 shut_down_emacs (0, 0, STRINGP (arg
) ? arg
: Qnil
);
1602 /* If we have an auto-save list file,
1603 kill it because we are exiting Emacs deliberately (not crashing).
1604 Do it after shut_down_emacs, which does an auto-save. */
1605 if (STRINGP (Vauto_save_list_file_name
))
1606 unlink (XSTRING (Vauto_save_list_file_name
)->data
);
1608 exit (INTEGERP (arg
) ? XINT (arg
)
1619 /* Perform an orderly shutdown of Emacs. Autosave any modified
1620 buffers, kill any child processes, clean up the terminal modes (if
1621 we're in the foreground), and other stuff like that. Don't perform
1622 any redisplay; this may be called when Emacs is shutting down in
1623 the background, or after its X connection has died.
1625 If SIG is a signal number, print a message for it.
1627 This is called by fatal signal handlers, X protocol error handlers,
1631 shut_down_emacs (sig
, no_x
, stuff
)
1635 /* Prevent running of hooks from now on. */
1638 /* If we are controlling the terminal, reset terminal modes */
1639 #ifdef EMACS_HAVE_TTY_PGRP
1641 int pgrp
= EMACS_GETPGRP (0);
1644 if (EMACS_GET_TTY_PGRP (0, &tpgrp
) != -1
1649 if (sig
&& sig
!= SIGTERM
)
1650 fprintf (stderr
, "Fatal error (%d).", sig
);
1658 stuff_buffered_input (stuff
);
1660 kill_buffer_processes (Qnil
);
1661 Fdo_auto_save (Qt
, Qnil
);
1663 #ifdef CLASH_DETECTION
1664 unlock_all_files ();
1668 kill_vms_processes ();
1671 #if 0 /* This triggers a bug in XCloseDisplay and is not needed. */
1672 #ifdef HAVE_X_WINDOWS
1673 /* It's not safe to call intern here. Maybe we are crashing. */
1674 if (!noninteractive
&& SYMBOLP (Vwindow_system
)
1675 && XSYMBOL (Vwindow_system
)->name
->size
== 1
1676 && XSYMBOL (Vwindow_system
)->name
->data
[0] == 'x'
1678 Fx_close_current_connection ();
1679 #endif /* HAVE_X_WINDOWS */
1683 /* There is a tendency for a SIGIO signal to arrive within exit,
1684 and cause a SIGHUP because the input descriptor is already closed. */
1686 signal (SIGIO
, SIG_IGN
);
1704 DEFUN ("dump-emacs-data", Fdump_emacs_data
, Sdump_emacs_data
, 1, 1, 0,
1705 "Dump current state of Emacs into data file FILENAME.\n\
1706 This function exists on systems that use HAVE_SHM.")
1708 Lisp_Object filename
;
1710 extern char my_edata
[];
1713 CHECK_STRING (filename
, 0);
1714 filename
= Fexpand_file_name (filename
, Qnil
);
1717 Vpurify_flag
= Qnil
;
1720 /* Tell malloc where start of impure now is */
1721 /* Also arrange for warnings when nearly out of space. */
1722 #ifndef SYSTEM_MALLOC
1723 memory_warnings (my_edata
, malloc_warning
);
1725 map_out_data (XSTRING (filename
)->data
);
1732 #else /* not HAVE_SHM */
1734 DEFUN ("dump-emacs", Fdump_emacs
, Sdump_emacs
, 2, 2, 0,
1735 "Dump current state of Emacs into executable file FILENAME.\n\
1736 Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\
1737 This is used in the file `loadup.el' when building Emacs.\n\
1739 You must run Emacs in batch mode in order to dump it.")
1741 Lisp_Object filename
, symfile
;
1743 extern char my_edata
[];
1746 int count
= specpdl_ptr
- specpdl
;
1748 if (! noninteractive
)
1749 error ("Dumping Emacs works only in batch mode");
1751 /* Bind `command-line-processed' to nil before dumping,
1752 so that the dumped Emacs will process its command line
1753 and set up to work with X windows if appropriate. */
1754 symbol
= intern ("command-line-process");
1755 specbind (symbol
, Qnil
);
1757 CHECK_STRING (filename
, 0);
1758 filename
= Fexpand_file_name (filename
, Qnil
);
1759 if (!NILP (symfile
))
1761 CHECK_STRING (symfile
, 0);
1762 if (XSTRING (symfile
)->size
)
1763 symfile
= Fexpand_file_name (symfile
, Qnil
);
1767 Vpurify_flag
= Qnil
;
1770 set_time_zone_rule (dump_tz
);
1771 #ifndef LOCALTIME_CACHE
1772 /* Force a tz reload, since set_time_zone_rule doesn't. */
1779 mapout_data (XSTRING (filename
)->data
);
1781 /* Tell malloc where start of impure now is */
1782 /* Also arrange for warnings when nearly out of space. */
1783 #ifndef SYSTEM_MALLOC
1785 /* On Windows, this was done before dumping, and that once suffices.
1786 Meanwhile, my_edata is not valid on Windows. */
1787 memory_warnings (my_edata
, malloc_warning
);
1788 #endif /* not WINDOWSNT */
1790 #ifdef DOUG_LEA_MALLOC
1791 malloc_state_ptr
= malloc_get_state ();
1793 unexec (XSTRING (filename
)->data
,
1794 !NILP (symfile
) ? XSTRING (symfile
)->data
: 0, my_edata
, 0, 0);
1795 #ifdef DOUG_LEA_MALLOC
1796 free (malloc_state_ptr
);
1798 #endif /* not VMS */
1802 return unbind_to (count
, Qnil
);
1805 #endif /* not HAVE_SHM */
1807 #endif /* not CANNOT_DUMP */
1814 decode_env_path (evarname
, defalt
)
1815 char *evarname
, *defalt
;
1817 register char *path
, *p
;
1818 Lisp_Object lpath
, element
, tem
;
1820 /* It's okay to use getenv here, because this function is only used
1821 to initialize variables when Emacs starts up, and isn't called
1824 path
= (char *) getenv (evarname
);
1830 /* Ensure values from the environment use the proper directory separator. */
1833 p
= alloca (strlen (path
) + 1);
1837 if ('/' == DIRECTORY_SEP
)
1838 dostounix_filename (path
);
1840 unixtodos_filename (path
);
1846 p
= index (path
, SEPCHAR
);
1847 if (!p
) p
= path
+ strlen (path
);
1848 element
= (p
- path
? make_string (path
, p
- path
)
1849 : build_string ("."));
1851 /* Add /: to the front of the name
1852 if it would otherwise be treated as magic. */
1853 tem
= Ffind_file_name_handler (element
, Qt
);
1855 element
= concat2 (build_string ("/:"), element
);
1857 lpath
= Fcons (element
, lpath
);
1863 return Fnreverse (lpath
);
1869 Qfile_name_handler_alist
= intern ("file-name-handler-alist");
1870 staticpro (&Qfile_name_handler_alist
);
1874 defsubr (&Sdump_emacs_data
);
1876 defsubr (&Sdump_emacs
);
1880 defsubr (&Skill_emacs
);
1882 defsubr (&Sinvocation_name
);
1883 defsubr (&Sinvocation_directory
);
1885 DEFVAR_LISP ("command-line-args", &Vcommand_line_args
,
1886 "Args passed by shell to Emacs, as a list of strings.");
1888 DEFVAR_LISP ("system-type", &Vsystem_type
,
1889 "Value is symbol indicating type of operating system you are using.");
1890 Vsystem_type
= intern (SYSTEM_TYPE
);
1892 DEFVAR_LISP ("system-configuration", &Vsystem_configuration
,
1893 "Value is string indicating configuration Emacs was built for.");
1894 Vsystem_configuration
= build_string (EMACS_CONFIGURATION
);
1896 DEFVAR_LISP ("system-configuration-options", &Vsystem_configuration_options
,
1897 "String containing the configuration options Emacs was built with.");
1898 Vsystem_configuration_options
= build_string (EMACS_CONFIG_OPTIONS
);
1900 DEFVAR_BOOL ("noninteractive", &noninteractive1
,
1901 "Non-nil means Emacs is running without interactive terminal.");
1903 DEFVAR_LISP ("kill-emacs-hook", &Vkill_emacs_hook
,
1904 "Hook to be run whenever kill-emacs is called.\n\
1905 Since kill-emacs may be invoked when the terminal is disconnected (or\n\
1906 in other similar situations), functions placed on this hook should not\n\
1907 expect to be able to interact with the user. To ask for confirmation,\n\
1908 see `kill-emacs-query-functions' instead.");
1909 Vkill_emacs_hook
= Qnil
;
1912 DEFVAR_LISP ("signal-USR1-hook", &Vsignal_USR1_hook
,
1913 "Hook to be run whenever emacs receives a USR1 signal");
1914 Vsignal_USR1_hook
= Qnil
;
1916 DEFVAR_LISP ("signal-USR2-hook", &Vsignal_USR2_hook
,
1917 "Hook to be run whenever emacs receives a USR2 signal");
1918 Vsignal_USR2_hook
= Qnil
;
1923 DEFVAR_INT ("emacs-priority", &emacs_priority
,
1924 "Priority for Emacs to run at.\n\
1925 This value is effective only if set before Emacs is dumped,\n\
1926 and only if the Emacs executable is installed with setuid to permit\n\
1927 it to change priority. (Emacs sets its uid back to the real uid.)\n\
1928 Currently, you need to define SET_EMACS_PRIORITY in `config.h'\n\
1929 before you compile Emacs, to enable the code for this feature.");
1932 DEFVAR_LISP ("path-separator", &Vpath_separator
,
1933 "The directory separator in search paths, as a string.");
1936 Vpath_separator
= make_string (&c
, 1);
1939 DEFVAR_LISP ("invocation-name", &Vinvocation_name
,
1940 "The program name that was used to run Emacs.\n\
1941 Any directory names are omitted.");
1943 DEFVAR_LISP ("invocation-directory", &Vinvocation_directory
,
1944 "The directory in which the Emacs executable was found, to run it.\n\
1945 The value is nil if that directory's name is not known.");
1947 DEFVAR_LISP ("installation-directory", &Vinstallation_directory
,
1948 "A directory within which to look for the `lib-src' and `etc' directories.\n\
1949 This is non-nil when we can't find those directories in their standard\n\
1950 installed locations, but we can find them\n\
1951 near where the Emacs executable was found.");
1952 Vinstallation_directory
= Qnil
;