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"
44 #include "blockinput.h"
45 #include "syssignal.h"
51 #include <sys/resource.h>
58 extern void malloc_warning ();
59 extern void set_time_zone_rule ();
60 extern char *index ();
61 extern char *strerror ();
63 /* Command line args from shell, as list of strings */
64 Lisp_Object Vcommand_line_args
;
66 /* The name under which Emacs was invoked, with any leading directory
68 Lisp_Object Vinvocation_name
;
70 /* The directory name from which Emacs was invoked. */
71 Lisp_Object Vinvocation_directory
;
73 /* The directory name in which to find subdirs such as lisp and etc.
74 nil means get them only from PATH_LOADSEARCH. */
75 Lisp_Object Vinstallation_directory
;
77 /* Hook run by `kill-emacs' before it does really anything. */
78 Lisp_Object Vkill_emacs_hook
;
81 /* Hooks for signal USR1 and USR2 handing */
82 Lisp_Object Vsignal_USR1_hook
;
84 Lisp_Object Vsignal_USR2_hook
;
88 /* Set nonzero after Emacs has started up the first time.
89 Prevents reinitialization of the Lisp world and keymaps
90 on subsequent starts. */
93 #ifdef DOUG_LEA_MALLOC
94 /* Preserves a pointer to the memory allocated that copies that
95 static data inside glibc's malloc. */
96 void *malloc_state_ptr
;
97 /* From glibc, a routine that returns a copy of the malloc internal state. */
98 extern void *malloc_get_state ();
99 /* From glibc, a routine that overwrites the malloc internal state. */
100 extern void malloc_set_state ();
103 /* Variable whose value is symbol giving operating system type. */
104 Lisp_Object Vsystem_type
;
106 /* Variable whose value is string giving configuration built for. */
107 Lisp_Object Vsystem_configuration
;
109 /* Variable whose value is string giving configuration options,
110 for use when reporting bugs. */
111 Lisp_Object Vsystem_configuration_options
;
113 Lisp_Object Qfile_name_handler_alist
;
115 /* If non-zero, emacs should not attempt to use an window-specific code,
116 but instead should use the virtual terminal under which it was started */
117 int inhibit_window_system
;
119 /* If nonzero, set Emacs to run at this priority. This is also used
120 in child_setup and sys_suspend to make sure subshells run at normal
121 priority; Those functions have their own extern declaration. */
124 /* If non-zero a filter or a sentinel is running. Tested to save the match
125 data on the first attempt to change it inside asynchronous code. */
126 int running_asynch_code
;
130 extern int inherited_pgroup
;
133 #ifdef HAVE_X_WINDOWS
134 /* If non-zero, -d was specified, meaning we're using some window system. */
138 /* An address near the bottom of the stack.
139 Tells GC how to save a copy of the stack. */
142 #ifdef HAVE_WINDOW_SYSTEM
143 extern Lisp_Object Vwindow_system
;
144 #endif /* HAVE_WINDOW_SYSTEM */
146 extern Lisp_Object Vauto_save_list_file_name
;
148 #ifdef USG_SHARED_LIBRARIES
149 /* If nonzero, this is the place to put the end of the writable segment
152 unsigned int bss_end
= 0;
155 /* Nonzero means running Emacs without interactive terminal. */
159 /* Value of Lisp variable `noninteractive'.
160 Normally same as C variable `noninteractive'
161 but nothing terrible happens if user sets this one. */
165 /* Save argv and argc. */
169 static void sort_args ();
170 void syms_of_emacs ();
172 /* Signal code for the fatal signal that was received */
173 int fatal_error_code
;
175 /* Nonzero if handling a fatal error already */
176 int fatal_error_in_progress
;
179 int SIGUSR1_in_progress
=0;
181 handle_USR1_signal (sig
)
184 if (! SIGUSR1_in_progress
)
186 SIGUSR1_in_progress
= 1;
188 if (!NILP (Vrun_hooks
) && !noninteractive
)
189 call1 (Vrun_hooks
, intern ("signal-USR1-hook"));
191 SIGUSR1_in_progress
= 0;
196 int SIGUSR2_in_progress
=0;
198 handle_USR2_signal (sig
)
201 if (! SIGUSR2_in_progress
)
203 SIGUSR2_in_progress
= 1;
205 if (!NILP (Vrun_hooks
) && !noninteractive
)
206 call1 (Vrun_hooks
, intern ("signal-USR2-hook"));
208 SIGUSR2_in_progress
= 0;
214 /* Handle bus errors, illegal instruction, etc. */
216 fatal_error_signal (sig
)
219 fatal_error_code
= sig
;
220 signal (sig
, SIG_DFL
);
222 TOTALLY_UNBLOCK_INPUT
;
224 /* If fatal error occurs in code below, avoid infinite recursion. */
225 if (! fatal_error_in_progress
)
227 fatal_error_in_progress
= 1;
229 shut_down_emacs (sig
, 0, Qnil
);
233 LIB$
STOP (SS$_ABORT
);
235 /* Signal the same code; this time it will really be fatal.
236 Remember that since we're in a signal handler, the signal we're
237 going to send is probably blocked, so we have to unblock it if we
238 want to really receive it. */
240 sigunblock (sigmask (fatal_error_code
));
242 kill (getpid (), fatal_error_code
);
248 /* Handler for SIGDANGER. */
250 memory_warning_signal (sig
)
253 signal (sig
, memory_warning_signal
);
255 malloc_warning ("Operating system warns that virtual memory is running low.\n");
257 /* It might be unsafe to call do_auto_save now. */
258 force_auto_save_soon ();
262 /* We define abort, rather than using it from the library,
263 so that GDB can return from a breakpoint here.
264 MSDOS has its own definition on msdos.c */
270 kill (getpid (), SIGABRT
);
275 /* Code for dealing with Lisp access to the Unix command line */
278 init_cmdargs (argc
, argv
, skip_args
)
284 Lisp_Object name
, dir
, tem
;
285 int count
= specpdl_ptr
- specpdl
;
286 Lisp_Object raw_name
;
291 raw_name
= build_string (argv
[0]);
293 /* Add /: to the front of the name
294 if it would otherwise be treated as magic. */
295 tem
= Ffind_file_name_handler (raw_name
, Qt
);
297 raw_name
= concat2 (build_string ("/:"), raw_name
);
299 Vinvocation_name
= Ffile_name_nondirectory (raw_name
);
300 Vinvocation_directory
= Ffile_name_directory (raw_name
);
302 /* If we got no directory in argv[0], search PATH to find where
303 Emacs actually came from. */
304 if (NILP (Vinvocation_directory
))
307 int yes
= openp (Vexec_path
, Vinvocation_name
,
308 EXEC_SUFFIXES
, &found
, 1);
311 /* Add /: to the front of the name
312 if it would otherwise be treated as magic. */
313 tem
= Ffind_file_name_handler (found
, Qt
);
315 found
= concat2 (build_string ("/:"), found
);
316 Vinvocation_directory
= Ffile_name_directory (found
);
320 if (!NILP (Vinvocation_directory
)
321 && NILP (Ffile_name_absolute_p (Vinvocation_directory
)))
322 /* Emacs was started with relative path, like ./emacs.
324 Vinvocation_directory
= Fexpand_file_name (Vinvocation_directory
, Qnil
);
326 Vinstallation_directory
= Qnil
;
328 if (!NILP (Vinvocation_directory
))
330 dir
= Vinvocation_directory
;
331 name
= Fexpand_file_name (Vinvocation_name
, dir
);
334 Lisp_Object tem
, lib_src_exists
;
335 Lisp_Object etc_exists
, info_exists
;
337 /* See if dir contains subdirs for use by Emacs.
338 Check for the ones that would exist in a build directory,
339 not including lisp and info. */
340 tem
= Fexpand_file_name (build_string ("lib-src"), dir
);
341 lib_src_exists
= Ffile_exists_p (tem
);
344 /* MSDOS installations frequently remove lib-src, but we still
345 must set installation-directory, or else info won't find
346 its files (it uses the value of installation-directory). */
347 tem
= Fexpand_file_name (build_string ("info"), dir
);
348 info_exists
= Ffile_exists_p (tem
);
353 if (!NILP (lib_src_exists
) || !NILP (info_exists
))
355 tem
= Fexpand_file_name (build_string ("etc"), dir
);
356 etc_exists
= Ffile_exists_p (tem
);
357 if (!NILP (etc_exists
))
359 Vinstallation_directory
360 = Ffile_name_as_directory (dir
);
365 /* See if dir's parent contains those subdirs. */
366 tem
= Fexpand_file_name (build_string ("../lib-src"), dir
);
367 lib_src_exists
= Ffile_exists_p (tem
);
371 /* See the MSDOS commentary above. */
372 tem
= Fexpand_file_name (build_string ("../info"), dir
);
373 info_exists
= Ffile_exists_p (tem
);
378 if (!NILP (lib_src_exists
) || !NILP (info_exists
))
380 tem
= Fexpand_file_name (build_string ("../etc"), dir
);
381 etc_exists
= Ffile_exists_p (tem
);
382 if (!NILP (etc_exists
))
384 tem
= Fexpand_file_name (build_string (".."), dir
);
385 Vinstallation_directory
386 = Ffile_name_as_directory (tem
);
391 /* If the Emacs executable is actually a link,
392 next try the dir that the link points into. */
393 tem
= Ffile_symlink_p (name
);
396 name
= Fexpand_file_name (tem
, dir
);
397 dir
= Ffile_name_directory (name
);
404 Vcommand_line_args
= Qnil
;
406 for (i
= argc
- 1; i
>= 0; i
--)
408 if (i
== 0 || i
> skip_args
)
410 = Fcons (build_string (argv
[i
]), Vcommand_line_args
);
413 unbind_to (count
, Qnil
);
416 DEFUN ("invocation-name", Finvocation_name
, Sinvocation_name
, 0, 0, 0,
417 "Return the program name that was used to run Emacs.\n\
418 Any directory names are omitted.")
421 return Fcopy_sequence (Vinvocation_name
);
424 DEFUN ("invocation-directory", Finvocation_directory
, Sinvocation_directory
,
426 "Return the directory name in which the Emacs executable was located")
429 return Fcopy_sequence (Vinvocation_directory
);
434 #ifdef LINK_CRTL_SHARE
435 #ifdef SHARABLE_LIB_BUG
436 extern noshare
char **environ
;
437 #endif /* SHARABLE_LIB_BUG */
438 #endif /* LINK_CRTL_SHARE */
442 /* A valid but unlikely value for the TZ environment value.
443 It is OK (though a bit slower) if the user actually chooses this value. */
444 static char dump_tz
[] = "UtC0";
447 #ifndef ORDINARY_LINK
448 /* We don't include crtbegin.o and crtend.o in the link,
449 so these functions and variables might be missed.
450 Provide dummy definitions to avoid error.
451 (We don't have any real constructors or destructors.) */
453 #ifndef GCC_CTORS_IN_LIBC
454 void __do_global_ctors ()
456 void __do_global_ctors_aux ()
458 void __do_global_dtors ()
460 /* Linux has a bug in its library; avoid an error. */
462 char * __CTOR_LIST__
[2] = { (char *) (-1), 0 };
464 char * __DTOR_LIST__
[2] = { (char *) (-1), 0 };
465 #endif /* GCC_CTORS_IN_LIBC */
468 #endif /* __GNUC__ */
469 #endif /* ORDINARY_LINK */
471 /* Test whether the next argument in ARGV matches SSTR or a prefix of
472 LSTR (at least MINLEN characters). If so, then if VALPTR is non-null
473 (the argument is supposed to have a value) store in *VALPTR either
474 the next argument or the portion of this one after the equal sign.
475 ARGV is read starting at position *SKIPPTR; this index is advanced
476 by the number of arguments used.
478 Too bad we can't just use getopt for all of this, but we don't have
479 enough information to do it right. */
482 argmatch (argv
, argc
, sstr
, lstr
, minlen
, valptr
, skipptr
)
495 /* Don't access argv[argc]; give up in advance. */
496 if (argc
<= *skipptr
+ 1)
499 arg
= argv
[*skipptr
+1];
502 if (strcmp (arg
, sstr
) == 0)
506 *valptr
= argv
[*skipptr
+2];
513 arglen
= (valptr
!= NULL
&& (p
= index (arg
, '=')) != NULL
514 ? p
- arg
: strlen (arg
));
515 if (lstr
== 0 || arglen
< minlen
|| strncmp (arg
, lstr
, arglen
) != 0)
517 else if (valptr
== NULL
)
528 else if (argv
[*skipptr
+2] != NULL
)
530 *valptr
= argv
[*skipptr
+2];
542 main (argc
, argv
, envp
)
547 char stack_bottom_variable
;
551 #ifdef HAVE_SETRLIMIT
555 #ifdef LINUX_SBRK_BUG
559 #ifdef DOUG_LEA_MALLOC
562 extern void r_alloc_reinit ();
563 malloc_set_state (malloc_state_ptr
);
564 free (malloc_state_ptr
);
569 #ifdef RUN_TIME_REMAP
571 run_time_remap (argv
[0]);
574 sort_args (argc
, argv
);
576 if (argmatch (argv
, argc
, "-version", "--version", 3, NULL
, &skip_args
))
579 tem
= Fsymbol_value (intern ("emacs-version"));
582 fprintf (stderr
, "Invalid value of `emacs-version'\n");
587 printf ("GNU Emacs %s\n", XSTRING (tem
)->data
);
588 printf ("Copyright (C) 1997 Free Software Foundation, Inc.\n");
589 printf ("GNU Emacs comes with ABSOLUTELY NO WARRANTY.\n");
590 printf ("You may redistribute copies of Emacs\n");
591 printf ("under the terms of the GNU General Public License.\n");
592 printf ("For more information about these matters, ");
593 printf ("see the files named COPYING.\n");
598 /* Map in shared memory, if we are using that. */
600 if (argmatch (argv
, argc
, "-nl", "--no-shared-memory", 6, NULL
, &skip_args
))
603 /* The shared memory was just restored, which clobbered this. */
609 /* The shared memory was just restored, which clobbered this. */
616 extern int malloc_cookie
;
617 /* This helps out unexnext.c. */
619 if (malloc_jumpstart (malloc_cookie
) != 0)
620 printf ("malloc jumpstart failed!\n");
625 /* If -map specified, map the data file in */
628 if (argmatch (argv
, argc
, "-map", "--map-data", 3, &mapin_file
, &skip_args
))
632 #ifdef LINK_CRTL_SHARE
633 #ifdef SHARABLE_LIB_BUG
634 /* Bletcherous shared libraries! */
636 stdin
= fdopen (0, "r");
638 stdout
= fdopen (1, "w");
640 stderr
= fdopen (2, "w");
643 #endif /* SHARABLE_LIB_BUG */
644 #endif /* LINK_CRTL_SHARE */
647 #if defined (HAVE_SETRLIMIT) && defined (RLIMIT_STACK)
648 /* Extend the stack space available.
649 Don't do that if dumping, since some systems (e.g. DJGPP)
650 might define a smaller stack limit at that time. */
653 && (!noninteractive
|| initialized
)
655 && !getrlimit (RLIMIT_STACK
, &rlim
))
658 extern int re_max_failures
;
659 /* Approximate the amount regex.c needs per unit of re_max_failures. */
660 int ratio
= 20 * sizeof (char *);
661 /* Then add 33% to cover the size of the smaller stacks that regex.c
662 successively allocates and discards, on its way to the maximum. */
664 /* Add in some extra to cover
665 what we're likely to use for other reasons. */
666 newlim
= re_max_failures
* ratio
+ 200000;
668 /* NetBSD (at least NetBSD 1.2G and former) has a bug in its
669 stack allocation routine for new process that the allocation
670 fails if stack limit is not on page boundary. So, round up the
671 new limit to page boundary. */
672 newlim
= (newlim
+ getpagesize () - 1) / getpagesize () * getpagesize();
674 if (newlim
> rlim
.rlim_max
)
676 newlim
= rlim
.rlim_max
;
677 /* Don't let regex.c overflow the stack we have. */
678 re_max_failures
= (newlim
- 200000) / ratio
;
680 if (rlim
.rlim_cur
< newlim
)
681 rlim
.rlim_cur
= newlim
;
683 setrlimit (RLIMIT_STACK
, &rlim
);
685 #endif /* HAVE_SETRLIMIT and RLIMIT_STACK */
687 /* Record (approximately) where the stack begins. */
688 stack_bottom
= &stack_bottom_variable
;
690 #ifdef USG_SHARED_LIBRARIES
692 brk ((void *)bss_end
);
697 #ifndef SYSTEM_MALLOC
700 /* Arrange to get warning messages as memory fills up. */
701 memory_warnings (0, malloc_warning
);
703 /* Arrange to disable interrupt input while malloc and friends are
705 uninterrupt_malloc ();
707 #endif /* not SYSTEM_MALLOC */
710 /* We do all file input/output as binary files. When we need to translate
711 newlines, we do that manually. */
715 if (!isatty (fileno (stdin
)))
716 setmode (fileno (stdin
), O_BINARY
);
717 if (!isatty (fileno (stdout
)))
720 setmode (fileno (stdout
), O_BINARY
);
722 #else /* not __DJGPP__ >= 2 */
723 (stdin
)->_flag
&= ~_IOTEXT
;
724 (stdout
)->_flag
&= ~_IOTEXT
;
725 (stderr
)->_flag
&= ~_IOTEXT
;
726 #endif /* not __DJGPP__ >= 2 */
729 #ifdef SET_EMACS_PRIORITY
731 nice (emacs_priority
);
733 #endif /* SET_EMACS_PRIORITY */
735 #ifdef EXTRA_INITIALIZE
739 inhibit_window_system
= 0;
742 int inhibit_unibyte
= 0;
744 /* --multibyte overrides EMACS_UNIBYTE. */
745 if (argmatch (argv
, argc
, "-no-unibyte", "--no-unibyte", 4, NULL
, &skip_args
)
746 || argmatch (argv
, argc
, "-multibyte", "--multibyte", 4, NULL
, &skip_args
))
749 /* --unibyte requests that we set up to do everything with single-byte
750 buffers and strings. We need to handle this before calling
751 init_lread, init_editfns and other places that generate Lisp strings
752 from text in the environment. */
753 if (argmatch (argv
, argc
, "-unibyte", "--unibyte", 4, NULL
, &skip_args
)
754 || argmatch (argv
, argc
, "-no-multibyte", "--no-multibyte", 4, NULL
, &skip_args
)
755 || (getenv ("EMACS_UNIBYTE") && !inhibit_unibyte
))
758 symbol
= intern ("default-enable-multibyte-characters");
760 Fset_default (symbol
, Qnil
);
764 /* Handle the -t switch, which specifies filename to use as terminal */
767 if (argmatch (argv
, argc
, "-t", "--terminal", 4, &term
, &skip_args
))
772 result
= open (term
, O_RDWR
, 2 );
775 char *errstring
= strerror (errno
);
776 fprintf (stderr
, "emacs: %s: %s\n", term
, errstring
);
782 fprintf (stderr
, "emacs: %s: not a tty\n", term
);
785 fprintf (stderr
, "Using %s\n", term
);
786 #ifdef HAVE_WINDOW_SYSTEM
787 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 [-t term] [--terminal term] [-nw] [--no-windows] [--batch]\n\
804 [-q] [--no-init-file] [-u user] [--user user] [--debug-init]\n\
805 [--version] [--no-site-file]\n\
806 [-f func] [--funcall func] [-l file] [--load file] [--insert file]\n\
807 [+linenum] file-to-visit [--kill]\n\
808 Report bugs to bug-gnu-emacs@prep.ai.mit.edu. First, please see\n\
809 the Bugs section of the Emacs manual or the file BUGS.\n", argv
[0]);
813 #ifdef HAVE_X_WINDOWS
814 /* Stupid kludge to catch command-line display spec. We can't
815 handle this argument entirely in window system dependent code
816 because we don't even know which window system dependent code
817 to run until we've recognized this argument. */
819 char *displayname
= 0;
821 int count_before
= skip_args
;
823 if (argmatch (argv
, argc
, "-d", "--display", 3, &displayname
, &skip_args
))
825 else if (argmatch (argv
, argc
, "-display", 0, 3, &displayname
, &skip_args
))
828 /* If we have the form --display=NAME,
829 convert it into -d name.
830 This requires inserting a new element into argv. */
831 if (displayname
!= 0 && skip_args
- count_before
== 1)
833 char **new = (char **) xmalloc (sizeof (char *) * (argc
+ 2));
836 for (j
= 0; j
< count_before
+ 1; j
++)
838 new[count_before
+ 1] = "-d";
839 new[count_before
+ 2] = displayname
;
840 for (j
= count_before
+ 2; j
<argc
; j
++)
841 new[j
+ 1] = argv
[j
];
845 /* Change --display to -d, when its arg is separate. */
846 else if (displayname
!= 0 && skip_args
> count_before
847 && argv
[count_before
+ 1][1] == '-')
848 argv
[count_before
+ 1] = "-d";
850 /* Don't actually discard this arg. */
851 skip_args
= count_before
;
855 if (! noninteractive
)
860 inherited_pgroup
= EMACS_GETPGRP (0);
861 setpgrp (0, getpid ());
864 #if defined (USG5) && defined (INTERRUPT_INPUT)
874 /* Don't catch SIGHUP if dumping. */
881 sigblock (sigmask (SIGHUP
));
882 /* In --batch mode, don't catch SIGHUP if already ignored.
883 That makes nohup work. */
885 || signal (SIGHUP
, SIG_IGN
) != SIG_IGN
)
886 signal (SIGHUP
, fatal_error_signal
);
887 sigunblock (sigmask (SIGHUP
));
892 ! noninteractive
|| initialized
898 /* Don't catch these signals in batch mode if dumping.
899 On some machines, this sets static data that would make
900 signal fail to work right when the dumped Emacs is run. */
901 signal (SIGQUIT
, fatal_error_signal
);
902 signal (SIGILL
, fatal_error_signal
);
903 signal (SIGTRAP
, fatal_error_signal
);
905 signal (SIGUSR1
, handle_USR1_signal
);
907 signal (SIGUSR2
, handle_USR2_signal
);
911 signal (SIGABRT
, fatal_error_signal
);
914 signal (SIGHWE
, fatal_error_signal
);
917 signal (SIGPRE
, fatal_error_signal
);
920 signal (SIGORE
, fatal_error_signal
);
923 signal (SIGUME
, fatal_error_signal
);
926 signal (SIGDLK
, fatal_error_signal
);
929 signal (SIGCPULIM
, fatal_error_signal
);
932 /* This is missing on some systems - OS/2, for example. */
933 signal (SIGIOT
, fatal_error_signal
);
936 signal (SIGEMT
, fatal_error_signal
);
938 signal (SIGFPE
, fatal_error_signal
);
940 signal (SIGBUS
, fatal_error_signal
);
942 signal (SIGSEGV
, fatal_error_signal
);
944 signal (SIGSYS
, fatal_error_signal
);
946 signal (SIGTERM
, fatal_error_signal
);
948 signal (SIGXCPU
, fatal_error_signal
);
951 signal (SIGXFSZ
, fatal_error_signal
);
955 /* This just means available memory is getting low. */
956 signal (SIGDANGER
, memory_warning_signal
);
960 /* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU. */
961 signal (SIGXCPU
, fatal_error_signal
);
963 signal (SIGIOINT
, fatal_error_signal
);
965 signal (SIGGRANT
, fatal_error_signal
);
966 signal (SIGRETRACT
, fatal_error_signal
);
967 signal (SIGSOUND
, fatal_error_signal
);
968 signal (SIGMSG
, fatal_error_signal
);
972 noninteractive1
= noninteractive
;
974 /* Perform basic initializations (not merely interning symbols) */
981 init_charset_once ();
983 init_syntax_once (); /* Create standard syntax table. */
984 init_category_once (); /* Create standard category table. */
985 /* Must be done before init_buffer */
986 init_casetab_once ();
987 init_buffer_once (); /* Create buffer table and some buffers */
988 init_minibuf_once (); /* Create list of minibuffers */
989 /* Must precede init_window_once */
990 init_window_once (); /* Init the window system */
996 running_asynch_code
= 0;
999 /* Call early 'cause init_environment needs it. */
1001 /* Set defaults for several environment variables. */
1003 init_environment (argc
, argv
, skip_args
);
1009 /* Initialize environment from registry settings. */
1010 init_environment ();
1011 init_ntproc (); /* must precede init_editfns */
1014 /* egetenv is a pretty low-level facility, which may get called in
1015 many circumstances; it seems flimsy to put off initializing it
1016 until calling init_callproc. */
1017 set_process_environment ();
1018 /* AIX crashes are reported in system versions 3.2.3 and 3.2.4
1019 if this is not done. Do it after set_process_environment so that we
1020 don't pollute Vprocess_environment. */
1025 init_buffer (); /* Init default directory of main buffer */
1027 init_callproc_1 (); /* Must precede init_cmdargs and init_sys_modes. */
1028 init_cmdargs (argc
, argv
, skip_args
); /* Must precede init_lread. */
1032 /* Erase any pre-dump messages in the message log, to avoid confusion */
1033 Lisp_Object old_log_max
;
1034 old_log_max
= Vmessage_log_max
;
1035 XSETFASTINT (Vmessage_log_max
, 0);
1036 message_dolog ("", 0, 1, 0);
1037 Vmessage_log_max
= old_log_max
;
1040 init_callproc (); /* Must follow init_cmdargs but not init_sys_modes. */
1043 if (!noninteractive
)
1046 init_vms_input ();/* init_display calls get_frame_size, that needs this */
1048 init_display (); /* Determine terminal type. init_sys_modes uses results */
1050 init_keyboard (); /* This too must precede init_sys_modes */
1052 init_vmsproc (); /* And this too. */
1054 init_sys_modes (); /* Init system terminal modes (RAW or CBREAK, etc.) */
1058 #ifdef LISP_FLOAT_TYPE
1066 /* Intern the names of all standard functions and variables; define standard keys */
1070 /* The basic levels of Lisp must come first */
1071 /* And data must come first of all
1072 for the sake of symbols like error-message */
1079 syms_of_floatfns ();
1083 syms_of_bytecode ();
1085 syms_of_casefiddle ();
1087 syms_of_callproc ();
1088 syms_of_category ();
1092 #ifndef NO_DIR_LIBRARY
1094 #endif /* not NO_DIR_LIBRARY */
1100 syms_of_coding (); /* This should be after syms_of_fileio. */
1101 #ifdef CLASH_DETECTION
1102 syms_of_filelock ();
1103 #endif /* CLASH_DETECTION */
1106 syms_of_keyboard ();
1111 syms_of_mocklisp ();
1119 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
1120 syms_of_textprop ();
1126 #endif /* WINDOWSNT */
1129 #ifdef HAVE_X_WINDOWS
1136 #endif /* HAVE_X_WINDOWS */
1146 syms_of_w32faces ();
1147 syms_of_w32select ();
1149 #endif /* HAVE_NTGUI */
1159 keys_of_casefiddle ();
1162 keys_of_keyboard ();
1173 /* Handle -l loadup-and-dump, args passed by Makefile. */
1174 if (argmatch (argv
, argc
, "-l", "--load", 3, &file
, &skip_args
))
1175 Vtop_level
= Fcons (intern ("load"),
1176 Fcons (build_string (file
), Qnil
));
1178 /* Unless next switch is -nl, load "loadup.el" first thing. */
1179 if (!argmatch (argv
, argc
, "-nl", "--no-loadup", 6, NULL
, &skip_args
))
1180 Vtop_level
= Fcons (intern ("load"),
1181 Fcons (build_string ("loadup.el"), Qnil
));
1182 #endif /* CANNOT_DUMP */
1189 /* If the execution TZ happens to be the same as the dump TZ,
1190 change it to some other value and then change it back,
1191 to force the underlying implementation to reload the TZ info.
1192 This is needed on implementations that load TZ info from files,
1193 since the TZ file contents may differ between dump and execution. */
1194 char *tz
= getenv ("TZ");
1195 if (tz
&& !strcmp (tz
, dump_tz
))
1205 /* Gerd Moellmann <gerd@acm.org> says this makes profiling work on
1206 FreeBSD. It might work on some other systems too.
1207 Give it a try and tell me if it works on your system. */
1212 extern void _mcleanup ();
1214 extern Lisp_Object
Fredraw_frame ();
1216 /* This uses Fredraw_frame because that function
1217 comes first in the Emacs executable.
1218 It might be better to use something that gives
1219 the start of the text segment, but start_of_text
1220 is not defined on all systems now. */
1221 monstartup (Fredraw_frame
, &etext
);
1230 #ifdef LOCALTIME_CACHE
1231 /* Some versions of localtime have a bug. They cache the value of the time
1232 zone rather than looking it up every time. Since localtime() is
1233 called to bolt the undumping time into the undumped emacs, this
1234 results in localtime ignoring the TZ environment variable.
1235 This flushes the new TZ value into localtime. */
1237 #endif /* defined (LOCALTIME_CACHE) */
1239 /* Enter editor command loop. This never returns. */
1244 /* Sort the args so we can find the most important ones
1245 at the beginning of argv. */
1247 /* First, here's a table of all the standard options. */
1249 struct standard_args
1257 struct standard_args standard_args
[] =
1259 { "-version", "--version", 110, 0 },
1260 { "-help", "--help", 110, 0 },
1261 { "-nl", "--no-shared-memory", 100, 0 },
1263 { "-map", "--map-data", 100, 0 },
1265 { "-no-unibyte", "--no-unibyte", 96, 0 },
1266 { "-multibyte", "--multibyte", 96, 0 },
1267 { "-unibyte", "--unibyte", 95, 0 },
1268 { "-no-multibyte", "--no-multibyte", 95, 0 },
1269 { "-t", "--terminal", 90, 1 },
1270 { "-d", "--display", 80, 1 },
1271 { "-display", 0, 80, 1 },
1272 { "-nw", "--no-windows", 70, 0 },
1273 { "-batch", "--batch", 60, 0 },
1274 { "-q", "--no-init-file", 50, 0 },
1275 { "-no-init-file", 0, 50, 0 },
1276 { "-no-site-file", "--no-site-file", 40, 0 },
1277 { "-u", "--user", 30, 1 },
1278 { "-user", 0, 30, 1 },
1279 { "-debug-init", "--debug-init", 20, 0 },
1280 { "-i", "--icon-type", 15, 0 },
1281 { "-itype", 0, 15, 0 },
1282 { "-iconic", "--iconic", 15, 0 },
1283 { "-bg", "--background-color", 10, 1 },
1284 { "-background", 0, 10, 1 },
1285 { "-fg", "--foreground-color", 10, 1 },
1286 { "-foreground", 0, 10, 1 },
1287 { "-bd", "--border-color", 10, 1 },
1288 { "-bw", "--border-width", 10, 1 },
1289 { "-ib", "--internal-border", 10, 1 },
1290 { "-ms", "--mouse-color", 10, 1 },
1291 { "-cr", "--cursor-color", 10, 1 },
1292 { "-fn", "--font", 10, 1 },
1293 { "-font", 0, 10, 1 },
1294 { "-g", "--geometry", 10, 1 },
1295 { "-geometry", 0, 10, 1 },
1296 { "-T", "--title", 10, 1 },
1297 { "-title", 0, 10, 1 },
1298 { "-name", "--name", 10, 1 },
1299 { "-xrm", "--xrm", 10, 1 },
1300 { "-r", "--reverse-video", 5, 0 },
1302 { "-reverse", 0, 5, 0 },
1303 { "-hb", "--horizontal-scroll-bars", 5, 0 },
1304 { "-vb", "--vertical-scroll-bars", 5, 0 },
1305 /* These have the same priority as ordinary file name args,
1306 so they are not reordered with respect to those. */
1307 { "-L", "--directory", 0, 1 },
1308 { "-directory", 0, 0, 1 },
1309 { "-l", "--load", 0, 1 },
1310 { "-load", 0, 0, 1 },
1311 { "-f", "--funcall", 0, 1 },
1312 { "-funcall", 0, 0, 1 },
1313 { "-eval", "--eval", 0, 1 },
1314 { "-find-file", "--find-file", 0, 1 },
1315 { "-visit", "--visit", 0, 1 },
1316 { "-insert", "--insert", 0, 1 },
1317 /* This should be processed after ordinary file name args and the like. */
1318 { "-kill", "--kill", -10, 0 },
1321 /* Reorder the elements of ARGV (assumed to have ARGC elements)
1322 so that the highest priority ones come first.
1323 Do not change the order of elements of equal priority.
1324 If an option takes an argument, keep it and its argument together. */
1327 sort_args (argc
, argv
)
1331 char **new = (char **) xmalloc (sizeof (char *) * argc
);
1332 /* For each element of argv,
1333 the corresponding element of options is:
1334 0 for an option that takes no arguments,
1335 1 for an option that takes one argument, etc.
1336 -1 for an ordinary non-option argument. */
1337 int *options
= (int *) xmalloc (sizeof (int) * argc
);
1338 int *priority
= (int *) xmalloc (sizeof (int) * argc
);
1342 int end_of_options
= argc
;
1344 /* Categorize all the options,
1345 and figure out which argv elts are option arguments. */
1346 for (from
= 1; from
< argc
; from
++)
1350 if (argv
[from
][0] == '-')
1355 /* If we have found "--", don't consider
1356 any more arguments as options. */
1357 if (argv
[from
][1] == '-' && argv
[from
][2] == 0)
1359 /* Leave the "--", and everything following it, at the end. */
1360 for (; from
< argc
; from
++)
1362 priority
[from
] = -100;
1368 /* Look for a match with a known old-fashioned option. */
1369 for (i
= 0; i
< sizeof (standard_args
) / sizeof (standard_args
[0]); i
++)
1370 if (!strcmp (argv
[from
], standard_args
[i
].name
))
1372 options
[from
] = standard_args
[i
].nargs
;
1373 priority
[from
] = standard_args
[i
].priority
;
1374 if (from
+ standard_args
[i
].nargs
>= argc
)
1375 fatal ("Option `%s' requires an argument\n", argv
[from
]);
1376 from
+= standard_args
[i
].nargs
;
1380 /* Look for a match with a known long option.
1381 MATCH is -1 if no match so far, -2 if two or more matches so far,
1382 >= 0 (the table index of the match) if just one match so far. */
1383 if (argv
[from
][1] == '-')
1386 thislen
= strlen (argv
[from
]);
1387 equals
= index (argv
[from
], '=');
1389 thislen
= equals
- argv
[from
];
1392 i
< sizeof (standard_args
) / sizeof (standard_args
[0]); i
++)
1393 if (standard_args
[i
].longname
1394 && !strncmp (argv
[from
], standard_args
[i
].longname
,
1403 /* If we found exactly one match, use that. */
1406 options
[from
] = standard_args
[match
].nargs
;
1407 priority
[from
] = standard_args
[match
].priority
;
1408 /* If --OPTION=VALUE syntax is used,
1409 this option uses just one argv element. */
1412 if (from
+ options
[from
] >= argc
)
1413 fatal ("Option `%s' requires an argument\n", argv
[from
]);
1414 from
+= options
[from
];
1421 /* Copy the arguments, in order of decreasing priority, to NEW. */
1426 int best_priority
= -9999;
1428 /* Find the highest priority remaining option.
1429 If several have equal priority, take the first of them. */
1430 for (from
= 1; from
< argc
; from
++)
1432 if (argv
[from
] != 0 && priority
[from
] > best_priority
)
1434 best_priority
= priority
[from
];
1437 /* Skip option arguments--they are tied to the options. */
1438 if (options
[from
] > 0)
1439 from
+= options
[from
];
1445 /* Copy the highest priority remaining option, with its args, to NEW. */
1446 new[to
++] = argv
[best
];
1447 for (i
= 0; i
< options
[best
]; i
++)
1448 new[to
++] = argv
[best
+ i
+ 1];
1450 /* Clear out this option in ARGV. */
1452 for (i
= 0; i
< options
[best
]; i
++)
1453 argv
[best
+ i
+ 1] = 0;
1456 bcopy (new, argv
, sizeof (char *) * argc
);
1463 DEFUN ("kill-emacs", Fkill_emacs
, Skill_emacs
, 0, 1, "P",
1464 "Exit the Emacs job and kill it.\n\
1465 If ARG is an integer, return ARG as the exit program code.\n\
1466 If ARG is a string, stuff it as keyboard input.\n\n\
1467 The value of `kill-emacs-hook', if not void,\n\
1468 is a list of functions (of no args),\n\
1469 all of which are called before Emacs is actually killed.")
1473 Lisp_Object hook
, hook1
;
1475 struct gcpro gcpro1
;
1482 if (!NILP (Vrun_hooks
) && !noninteractive
)
1483 call1 (Vrun_hooks
, intern ("kill-emacs-hook"));
1487 /* Is it really necessary to do this deassign
1488 when we are going to exit anyway? */
1493 shut_down_emacs (0, 0, STRINGP (arg
) ? arg
: Qnil
);
1495 /* If we have an auto-save list file,
1496 kill it because we are exiting Emacs deliberately (not crashing).
1497 Do it after shut_down_emacs, which does an auto-save. */
1498 if (STRINGP (Vauto_save_list_file_name
))
1499 unlink (XSTRING (Vauto_save_list_file_name
)->data
);
1501 exit (INTEGERP (arg
) ? XINT (arg
)
1512 /* Perform an orderly shutdown of Emacs. Autosave any modified
1513 buffers, kill any child processes, clean up the terminal modes (if
1514 we're in the foreground), and other stuff like that. Don't perform
1515 any redisplay; this may be called when Emacs is shutting down in
1516 the background, or after its X connection has died.
1518 If SIG is a signal number, print a message for it.
1520 This is called by fatal signal handlers, X protocol error handlers,
1524 shut_down_emacs (sig
, no_x
, stuff
)
1528 /* Prevent running of hooks from now on. */
1531 /* If we are controlling the terminal, reset terminal modes */
1532 #ifdef EMACS_HAVE_TTY_PGRP
1534 int pgrp
= EMACS_GETPGRP (0);
1537 if (EMACS_GET_TTY_PGRP (0, &tpgrp
) != -1
1542 if (sig
&& sig
!= SIGTERM
)
1543 fprintf (stderr
, "Fatal error (%d).", sig
);
1551 stuff_buffered_input (stuff
);
1553 kill_buffer_processes (Qnil
);
1554 Fdo_auto_save (Qt
, Qnil
);
1556 #ifdef CLASH_DETECTION
1557 unlock_all_files ();
1561 kill_vms_processes ();
1564 #if 0 /* This triggers a bug in XCloseDisplay and is not needed. */
1565 #ifdef HAVE_X_WINDOWS
1566 /* It's not safe to call intern here. Maybe we are crashing. */
1567 if (!noninteractive
&& SYMBOLP (Vwindow_system
)
1568 && XSYMBOL (Vwindow_system
)->name
->size
== 1
1569 && XSYMBOL (Vwindow_system
)->name
->data
[0] == 'x'
1571 Fx_close_current_connection ();
1572 #endif /* HAVE_X_WINDOWS */
1576 /* There is a tendency for a SIGIO signal to arrive within exit,
1577 and cause a SIGHUP because the input descriptor is already closed. */
1579 signal (SIGIO
, SIG_IGN
);
1597 DEFUN ("dump-emacs-data", Fdump_emacs_data
, Sdump_emacs_data
, 1, 1, 0,
1598 "Dump current state of Emacs into data file FILENAME.\n\
1599 This function exists on systems that use HAVE_SHM.")
1601 Lisp_Object filename
;
1603 extern char my_edata
[];
1606 CHECK_STRING (filename
, 0);
1607 filename
= Fexpand_file_name (filename
, Qnil
);
1610 Vpurify_flag
= Qnil
;
1613 /* Tell malloc where start of impure now is */
1614 /* Also arrange for warnings when nearly out of space. */
1615 #ifndef SYSTEM_MALLOC
1616 memory_warnings (my_edata
, malloc_warning
);
1618 map_out_data (XSTRING (filename
)->data
);
1625 #else /* not HAVE_SHM */
1627 DEFUN ("dump-emacs", Fdump_emacs
, Sdump_emacs
, 2, 2, 0,
1628 "Dump current state of Emacs into executable file FILENAME.\n\
1629 Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\
1630 This is used in the file `loadup.el' when building Emacs.\n\
1632 You must run Emacs in batch mode in order to dump it.")
1634 Lisp_Object filename
, symfile
;
1636 extern char my_edata
[];
1639 int count
= specpdl_ptr
- specpdl
;
1641 if (! noninteractive
)
1642 error ("Dumping Emacs works only in batch mode");
1644 /* Bind `command-line-processed' to nil before dumping,
1645 so that the dumped Emacs will process its command line
1646 and set up to work with X windows if appropriate. */
1647 symbol
= intern ("command-line-process");
1648 specbind (symbol
, Qnil
);
1650 CHECK_STRING (filename
, 0);
1651 filename
= Fexpand_file_name (filename
, Qnil
);
1652 if (!NILP (symfile
))
1654 CHECK_STRING (symfile
, 0);
1655 if (XSTRING (symfile
)->size
)
1656 symfile
= Fexpand_file_name (symfile
, Qnil
);
1660 Vpurify_flag
= Qnil
;
1663 set_time_zone_rule (dump_tz
);
1664 #ifndef LOCALTIME_CACHE
1665 /* Force a tz reload, since set_time_zone_rule doesn't. */
1672 mapout_data (XSTRING (filename
)->data
);
1674 /* Tell malloc where start of impure now is */
1675 /* Also arrange for warnings when nearly out of space. */
1676 #ifndef SYSTEM_MALLOC
1678 /* On Windows, this was done before dumping, and that once suffices.
1679 Meanwhile, my_edata is not valid on Windows. */
1680 memory_warnings (my_edata
, malloc_warning
);
1681 #endif /* not WINDOWSNT */
1683 #ifdef DOUG_LEA_MALLOC
1684 malloc_state_ptr
= malloc_get_state ();
1686 unexec (XSTRING (filename
)->data
,
1687 !NILP (symfile
) ? XSTRING (symfile
)->data
: 0, my_edata
, 0, 0);
1688 #ifdef DOUG_LEA_MALLOC
1689 free (malloc_state_ptr
);
1691 #endif /* not VMS */
1695 return unbind_to (count
, Qnil
);
1698 #endif /* not HAVE_SHM */
1700 #endif /* not CANNOT_DUMP */
1707 decode_env_path (evarname
, defalt
)
1708 char *evarname
, *defalt
;
1710 register char *path
, *p
;
1711 Lisp_Object lpath
, element
, tem
;
1713 /* It's okay to use getenv here, because this function is only used
1714 to initialize variables when Emacs starts up, and isn't called
1717 path
= (char *) getenv (evarname
);
1723 /* Ensure values from the environment use the proper directory separator. */
1726 p
= alloca (strlen (path
) + 1);
1730 if ('/' == DIRECTORY_SEP
)
1731 dostounix_filename (path
);
1733 unixtodos_filename (path
);
1739 p
= index (path
, SEPCHAR
);
1740 if (!p
) p
= path
+ strlen (path
);
1741 element
= (p
- path
? make_string (path
, p
- path
)
1742 : build_string ("."));
1744 /* Add /: to the front of the name
1745 if it would otherwise be treated as magic. */
1746 tem
= Ffind_file_name_handler (element
, Qt
);
1748 element
= concat2 (build_string ("/:"), element
);
1750 lpath
= Fcons (element
, lpath
);
1756 return Fnreverse (lpath
);
1762 Qfile_name_handler_alist
= intern ("file-name-handler-alist");
1763 staticpro (&Qfile_name_handler_alist
);
1767 defsubr (&Sdump_emacs_data
);
1769 defsubr (&Sdump_emacs
);
1773 defsubr (&Skill_emacs
);
1775 defsubr (&Sinvocation_name
);
1776 defsubr (&Sinvocation_directory
);
1778 DEFVAR_LISP ("command-line-args", &Vcommand_line_args
,
1779 "Args passed by shell to Emacs, as a list of strings.");
1781 DEFVAR_LISP ("system-type", &Vsystem_type
,
1782 "Value is symbol indicating type of operating system you are using.");
1783 Vsystem_type
= intern (SYSTEM_TYPE
);
1785 DEFVAR_LISP ("system-configuration", &Vsystem_configuration
,
1786 "Value is string indicating configuration Emacs was built for.");
1787 Vsystem_configuration
= build_string (EMACS_CONFIGURATION
);
1789 DEFVAR_LISP ("system-configuration-options", &Vsystem_configuration_options
,
1790 "String containing the configuration options Emacs was built with.");
1791 Vsystem_configuration_options
= build_string (EMACS_CONFIG_OPTIONS
);
1793 DEFVAR_BOOL ("noninteractive", &noninteractive1
,
1794 "Non-nil means Emacs is running without interactive terminal.");
1796 DEFVAR_LISP ("kill-emacs-hook", &Vkill_emacs_hook
,
1797 "Hook to be run whenever kill-emacs is called.\n\
1798 Since kill-emacs may be invoked when the terminal is disconnected (or\n\
1799 in other similar situations), functions placed on this hook should not\n\
1800 expect to be able to interact with the user. To ask for confirmation,\n\
1801 see `kill-emacs-query-functions' instead.");
1802 Vkill_emacs_hook
= Qnil
;
1805 DEFVAR_LISP ("signal-USR1-hook", &Vsignal_USR1_hook
,
1806 "Hook to be run whenever emacs recieves a USR1 signal");
1807 Vsignal_USR1_hook
= Qnil
;
1809 DEFVAR_LISP ("signal-USR2-hook", &Vsignal_USR2_hook
,
1810 "Hook to be run whenever emacs recieves a USR2 signal");
1811 Vsignal_USR2_hook
= Qnil
;
1816 DEFVAR_INT ("emacs-priority", &emacs_priority
,
1817 "Priority for Emacs to run at.\n\
1818 This value is effective only if set before Emacs is dumped,\n\
1819 and only if the Emacs executable is installed with setuid to permit\n\
1820 it to change priority. (Emacs sets its uid back to the real uid.)\n\
1821 Currently, you need to define SET_EMACS_PRIORITY in `config.h'\n\
1822 before you compile Emacs, to enable the code for this feature.");
1825 DEFVAR_LISP ("invocation-name", &Vinvocation_name
,
1826 "The program name that was used to run Emacs.\n\
1827 Any directory names are omitted.");
1829 DEFVAR_LISP ("invocation-directory", &Vinvocation_directory
,
1830 "The directory in which the Emacs executable was found, to run it.\n\
1831 The value is nil if that directory's name is not known.");
1833 DEFVAR_LISP ("installation-directory", &Vinstallation_directory
,
1834 "A directory within which to look for the `lib-src' and `etc' directories.\n\
1835 This is non-nil when we can't find those directories in their standard\n\
1836 installed locations, but we can find them\n\
1837 near where the Emacs executable was found.");
1838 Vinstallation_directory
= Qnil
;