1 /* Fully extensible Emacs, running on Unix, intended for GNU.
2 Copyright (C) 1985, 86, 87, 93, 94, 95 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"
50 #include <sys/resource.h>
57 extern void malloc_warning ();
58 extern void set_time_zone_rule ();
59 extern char *index ();
60 extern char *strerror ();
62 /* Command line args from shell, as list of strings */
63 Lisp_Object Vcommand_line_args
;
65 /* The name under which Emacs was invoked, with any leading directory
67 Lisp_Object Vinvocation_name
;
69 /* The directory name from which Emacs was invoked. */
70 Lisp_Object Vinvocation_directory
;
72 /* The directory name in which to find subdirs such as lisp and etc.
73 nil means get them only from PATH_LOADSEARCH. */
74 Lisp_Object Vinstallation_directory
;
76 /* Hook run by `kill-emacs' before it does really anything. */
77 Lisp_Object Vkill_emacs_hook
;
80 /* Hooks for signal USR1 and USR2 handing */
81 Lisp_Object Vsignal_USR1_hook
;
83 Lisp_Object Vsignal_USR2_hook
;
87 /* Set nonzero after Emacs has started up the first time.
88 Prevents reinitialization of the Lisp world and keymaps
89 on subsequent starts. */
92 #ifdef DOUG_LEA_MALLOC
93 /* Preserves a pointer to the memory allocated that copies that
94 static data inside glibc's malloc. */
95 void *malloc_state_ptr
;
96 /* From glibc, a routine that returns a copy of the malloc internal state. */
97 extern void *malloc_get_state ();
98 /* From glibc, a routine that overwrites the malloc internal state. */
99 extern void malloc_set_state ();
102 /* Variable whose value is symbol giving operating system type. */
103 Lisp_Object Vsystem_type
;
105 /* Variable whose value is string giving configuration built for. */
106 Lisp_Object Vsystem_configuration
;
108 /* Variable whose value is string giving configuration options,
109 for use when reporting bugs. */
110 Lisp_Object Vsystem_configuration_options
;
112 Lisp_Object Qfile_name_handler_alist
;
114 /* If non-zero, emacs should not attempt to use an window-specific code,
115 but instead should use the virtual terminal under which it was started */
116 int inhibit_window_system
;
118 /* If nonzero, set Emacs to run at this priority. This is also used
119 in child_setup and sys_suspend to make sure subshells run at normal
120 priority; Those functions have their own extern declaration. */
123 /* If non-zero a filter or a sentinel is running. Tested to save the match
124 data on the first attempt to change it inside asynchronous code. */
125 int running_asynch_code
;
129 extern int inherited_pgroup
;
132 #ifdef HAVE_X_WINDOWS
133 /* If non-zero, -d was specified, meaning we're using some window system. */
137 /* An address near the bottom of the stack.
138 Tells GC how to save a copy of the stack. */
141 #ifdef HAVE_WINDOW_SYSTEM
142 extern Lisp_Object Vwindow_system
;
143 #endif /* HAVE_WINDOW_SYSTEM */
145 extern Lisp_Object Vauto_save_list_file_name
;
147 #ifdef USG_SHARED_LIBRARIES
148 /* If nonzero, this is the place to put the end of the writable segment
151 unsigned int bss_end
= 0;
154 /* Nonzero means running Emacs without interactive terminal. */
158 /* Value of Lisp variable `noninteractive'.
159 Normally same as C variable `noninteractive'
160 but nothing terrible happens if user sets this one. */
164 /* Save argv and argc. */
168 static void sort_args ();
170 /* Signal code for the fatal signal that was received */
171 int fatal_error_code
;
173 /* Nonzero if handling a fatal error already */
174 int fatal_error_in_progress
;
177 int SIGUSR1_in_progress
=0;
179 handle_USR1_signal (sig
)
182 if (! SIGUSR1_in_progress
)
184 SIGUSR1_in_progress
= 1;
186 if (!NILP (Vrun_hooks
) && !noninteractive
)
187 call1 (Vrun_hooks
, intern ("signal-USR1-hook"));
189 SIGUSR1_in_progress
= 0;
194 int SIGUSR2_in_progress
=0;
196 handle_USR2_signal (sig
)
199 if (! SIGUSR2_in_progress
)
201 SIGUSR2_in_progress
= 1;
203 if (!NILP (Vrun_hooks
) && !noninteractive
)
204 call1 (Vrun_hooks
, intern ("signal-USR2-hook"));
206 SIGUSR2_in_progress
= 0;
212 /* Handle bus errors, illegal instruction, etc. */
214 fatal_error_signal (sig
)
217 fatal_error_code
= sig
;
218 signal (sig
, SIG_DFL
);
220 TOTALLY_UNBLOCK_INPUT
;
222 /* If fatal error occurs in code below, avoid infinite recursion. */
223 if (! fatal_error_in_progress
)
225 fatal_error_in_progress
= 1;
227 shut_down_emacs (sig
, 0, Qnil
);
231 LIB$
STOP (SS$_ABORT
);
233 /* Signal the same code; this time it will really be fatal.
234 Remember that since we're in a signal handler, the signal we're
235 going to send is probably blocked, so we have to unblock it if we
236 want to really receive it. */
238 sigunblock (sigmask (fatal_error_code
));
240 kill (getpid (), fatal_error_code
);
246 /* Handler for SIGDANGER. */
248 memory_warning_signal (sig
)
251 signal (sig
, memory_warning_signal
);
253 malloc_warning ("Operating system warns that virtual memory is running low.\n");
255 /* It might be unsafe to call do_auto_save now. */
256 force_auto_save_soon ();
260 /* We define abort, rather than using it from the library,
261 so that GDB can return from a breakpoint here. */
266 kill (getpid (), SIGABRT
);
270 /* Code for dealing with Lisp access to the Unix command line */
273 init_cmdargs (argc
, argv
, skip_args
)
279 Lisp_Object name
, dir
, tem
;
280 int count
= specpdl_ptr
- specpdl
;
281 Lisp_Object raw_name
;
286 raw_name
= build_string (argv
[0]);
288 /* Add /: to the front of the name
289 if it would otherwise be treated as magic. */
290 tem
= Ffind_file_name_handler (raw_name
, Qt
);
292 raw_name
= concat2 (build_string ("/:"), raw_name
);
294 Vinvocation_name
= Ffile_name_nondirectory (raw_name
);
295 Vinvocation_directory
= Ffile_name_directory (raw_name
);
297 /* If we got no directory in argv[0], search PATH to find where
298 Emacs actually came from. */
299 if (NILP (Vinvocation_directory
))
302 int yes
= openp (Vexec_path
, Vinvocation_name
,
303 EXEC_SUFFIXES
, &found
, 1);
306 /* Add /: to the front of the name
307 if it would otherwise be treated as magic. */
308 tem
= Ffind_file_name_handler (found
, Qt
);
310 found
= concat2 (build_string ("/:"), found
);
311 Vinvocation_directory
= Ffile_name_directory (found
);
315 if (!NILP (Vinvocation_directory
)
316 && NILP (Ffile_name_absolute_p (Vinvocation_directory
)))
317 /* Emacs was started with relative path, like ./emacs.
319 Vinvocation_directory
= Fexpand_file_name (Vinvocation_directory
, Qnil
);
321 Vinstallation_directory
= Qnil
;
323 if (!NILP (Vinvocation_directory
))
325 dir
= Vinvocation_directory
;
326 name
= Fexpand_file_name (Vinvocation_name
, dir
);
329 Lisp_Object tem
, lib_src_exists
;
330 Lisp_Object etc_exists
, info_exists
;
332 /* See if dir contains subdirs for use by Emacs.
333 Check for the ones that would exist in a build directory,
334 not including lisp and info. */
335 tem
= Fexpand_file_name (build_string ("lib-src"), dir
);
336 lib_src_exists
= Ffile_exists_p (tem
);
339 /* MSDOS installations frequently remove lib-src, but we still
340 must set installation-directory, or else info won't find
341 its files (it uses the value of installation-directory). */
342 tem
= Fexpand_file_name (build_string ("info"), dir
);
343 info_exists
= Ffile_exists_p (tem
);
348 if (!NILP (lib_src_exists
) || !NILP (info_exists
))
350 tem
= Fexpand_file_name (build_string ("etc"), dir
);
351 etc_exists
= Ffile_exists_p (tem
);
352 if (!NILP (etc_exists
))
354 Vinstallation_directory
355 = Ffile_name_as_directory (dir
);
360 /* See if dir's parent contains those subdirs. */
361 tem
= Fexpand_file_name (build_string ("../lib-src"), dir
);
362 lib_src_exists
= Ffile_exists_p (tem
);
366 /* See the MSDOS commentary above. */
367 tem
= Fexpand_file_name (build_string ("../info"), dir
);
368 info_exists
= Ffile_exists_p (tem
);
373 if (!NILP (lib_src_exists
) || !NILP (info_exists
))
375 tem
= Fexpand_file_name (build_string ("../etc"), dir
);
376 etc_exists
= Ffile_exists_p (tem
);
377 if (!NILP (etc_exists
))
379 tem
= Fexpand_file_name (build_string (".."), dir
);
380 Vinstallation_directory
381 = Ffile_name_as_directory (tem
);
386 /* If the Emacs executable is actually a link,
387 next try the dir that the link points into. */
388 tem
= Ffile_symlink_p (name
);
391 name
= Fexpand_file_name (tem
, dir
);
392 dir
= Ffile_name_directory (name
);
399 Vcommand_line_args
= Qnil
;
401 for (i
= argc
- 1; i
>= 0; i
--)
403 if (i
== 0 || i
> skip_args
)
405 = Fcons (build_string (argv
[i
]), Vcommand_line_args
);
408 unbind_to (count
, Qnil
);
411 DEFUN ("invocation-name", Finvocation_name
, Sinvocation_name
, 0, 0, 0,
412 "Return the program name that was used to run Emacs.\n\
413 Any directory names are omitted.")
416 return Fcopy_sequence (Vinvocation_name
);
419 DEFUN ("invocation-directory", Finvocation_directory
, Sinvocation_directory
,
421 "Return the directory name in which the Emacs executable was located")
424 return Fcopy_sequence (Vinvocation_directory
);
429 #ifdef LINK_CRTL_SHARE
430 #ifdef SHARABLE_LIB_BUG
431 extern noshare
char **environ
;
432 #endif /* SHARABLE_LIB_BUG */
433 #endif /* LINK_CRTL_SHARE */
437 /* A valid but unlikely value for the TZ environment value.
438 It is OK (though a bit slower) if the user actually chooses this value. */
439 static char dump_tz
[] = "UtC0";
442 #ifndef ORDINARY_LINK
443 /* We don't include crtbegin.o and crtend.o in the link,
444 so these functions and variables might be missed.
445 Provide dummy definitions to avoid error.
446 (We don't have any real constructors or destructors.) */
448 #ifndef GCC_CTORS_IN_LIBC
451 __do_global_ctors_aux ()
455 /* Linux has a bug in its library; avoid an error. */
457 char * __CTOR_LIST__
[2] = { (char *) (-1), 0 };
459 char * __DTOR_LIST__
[2] = { (char *) (-1), 0 };
460 #endif /* GCC_CTORS_IN_LIBC */
463 #endif /* __GNUC__ */
464 #endif /* ORDINARY_LINK */
466 /* Test whether the next argument in ARGV matches SSTR or a prefix of
467 LSTR (at least MINLEN characters). If so, then if VALPTR is non-null
468 (the argument is supposed to have a value) store in *VALPTR either
469 the next argument or the portion of this one after the equal sign.
470 ARGV is read starting at position *SKIPPTR; this index is advanced
471 by the number of arguments used.
473 Too bad we can't just use getopt for all of this, but we don't have
474 enough information to do it right. */
477 argmatch (argv
, argc
, sstr
, lstr
, minlen
, valptr
, skipptr
)
490 /* Don't access argv[argc]; give up in advance. */
491 if (argc
<= *skipptr
+ 1)
494 arg
= argv
[*skipptr
+1];
497 if (strcmp (arg
, sstr
) == 0)
501 *valptr
= argv
[*skipptr
+2];
508 arglen
= (valptr
!= NULL
&& (p
= index (arg
, '=')) != NULL
509 ? p
- arg
: strlen (arg
));
510 if (lstr
== 0 || arglen
< minlen
|| strncmp (arg
, lstr
, arglen
) != 0)
512 else if (valptr
== NULL
)
523 else if (argv
[*skipptr
+2] != NULL
)
525 *valptr
= argv
[*skipptr
+2];
536 main (argc
, argv
, envp
)
541 char stack_bottom_variable
;
545 #ifdef HAVE_SETRLIMIT
549 #ifdef LINUX_SBRK_BUG
553 #ifdef DOUG_LEA_MALLOC
556 malloc_set_state (malloc_state_ptr
);
557 free (malloc_state_ptr
);
562 #ifdef RUN_TIME_REMAP
564 run_time_remap (argv
[0]);
567 sort_args (argc
, argv
);
569 if (argmatch (argv
, argc
, "-version", "--version", 3, NULL
, &skip_args
))
572 tem
= Fsymbol_value (intern ("emacs-version"));
575 fprintf (stderr
, "Invalid value of `emacs-version'\n");
580 printf ("GNU Emacs %s\n", XSTRING (tem
)->data
);
581 printf ("Copyright (C) 1997 Free Software Foundation, Inc.\n");
582 printf ("GNU Emacs comes with ABSOLUTELY NO WARRANTY.\n");
583 printf ("You may redistribute copies of Emacs\n");
584 printf ("under the terms of the GNU General Public License.\n");
585 printf ("For more information about these matters, ");
586 printf ("see the files named COPYING.\n");
591 /* Map in shared memory, if we are using that. */
593 if (argmatch (argv
, argc
, "-nl", "--no-shared-memory", 6, NULL
, &skip_args
))
596 /* The shared memory was just restored, which clobbered this. */
602 /* The shared memory was just restored, which clobbered this. */
609 extern int malloc_cookie
;
610 /* This helps out unexnext.c. */
612 if (malloc_jumpstart (malloc_cookie
) != 0)
613 printf ("malloc jumpstart failed!\n");
618 /* If -map specified, map the data file in */
621 if (argmatch (argv
, argc
, "-map", "--map-data", 3, &mapin_file
, &skip_args
))
625 #ifdef LINK_CRTL_SHARE
626 #ifdef SHARABLE_LIB_BUG
627 /* Bletcherous shared libraries! */
629 stdin
= fdopen (0, "r");
631 stdout
= fdopen (1, "w");
633 stderr
= fdopen (2, "w");
636 #endif /* SHARABLE_LIB_BUG */
637 #endif /* LINK_CRTL_SHARE */
640 #if defined (HAVE_SETRLIMIT) && defined (RLIMIT_STACK)
641 /* Extend the stack space available.
642 Don't do that if dumping, since some systems (e.g. DJGPP)
643 might define a smaller stack limit at that time. */
646 && (!noninteractive
|| initialized
)
648 && !getrlimit (RLIMIT_STACK
, &rlim
))
651 extern int re_max_failures
;
652 /* Approximate the amount regex.c needs per unit of re_max_failures. */
653 int ratio
= 20 * sizeof (char *);
654 /* Then add 33% to cover the size of the smaller stacks that regex.c
655 successively allocates and discards, on its way to the maximum. */
657 /* Add in some extra to cover
658 what we're likely to use for other reasons. */
659 newlim
= re_max_failures
* ratio
+ 200000;
661 /* NetBSD (at least NetBSD 1.2G and former) has a bug in its
662 stack allocation routine for new process that the allocation
663 fails if stack limit is not on page boundary. So, round up the
664 new limit to page boundary. */
665 newlim
= (newlim
+ getpagesize () - 1) / getpagesize () * getpagesize();
667 if (newlim
> rlim
.rlim_max
)
669 newlim
= rlim
.rlim_max
;
670 /* Don't let regex.c overflow the stack we have. */
671 re_max_failures
= (newlim
- 200000) / ratio
;
673 if (rlim
.rlim_cur
< newlim
)
674 rlim
.rlim_cur
= newlim
;
676 setrlimit (RLIMIT_STACK
, &rlim
);
678 #endif /* HAVE_SETRLIMIT and RLIMIT_STACK */
680 /* Record (approximately) where the stack begins. */
681 stack_bottom
= &stack_bottom_variable
;
683 #ifdef USG_SHARED_LIBRARIES
685 brk ((void *)bss_end
);
690 #ifndef SYSTEM_MALLOC
693 /* Arrange to get warning messages as memory fills up. */
694 memory_warnings (0, malloc_warning
);
696 /* Arrange to disable interrupt input while malloc and friends are
698 uninterrupt_malloc ();
700 #endif /* not SYSTEM_MALLOC */
703 /* We do all file input/output as binary files. When we need to translate
704 newlines, we do that manually. */
708 if (!isatty (fileno (stdin
)))
709 setmode (fileno (stdin
), O_BINARY
);
710 if (!isatty (fileno (stdout
)))
713 setmode (fileno (stdout
), O_BINARY
);
715 #else /* not __DJGPP__ >= 2 */
716 (stdin
)->_flag
&= ~_IOTEXT
;
717 (stdout
)->_flag
&= ~_IOTEXT
;
718 (stderr
)->_flag
&= ~_IOTEXT
;
719 #endif /* not __DJGPP__ >= 2 */
722 #ifdef SET_EMACS_PRIORITY
724 nice (emacs_priority
);
726 #endif /* SET_EMACS_PRIORITY */
728 #ifdef EXTRA_INITIALIZE
732 inhibit_window_system
= 0;
734 /* Handle the -t switch, which specifies filename to use as terminal */
737 if (argmatch (argv
, argc
, "-t", "--terminal", 4, &term
, &skip_args
))
742 result
= open (term
, O_RDWR
, 2 );
745 char *errstring
= strerror (errno
);
746 fprintf (stderr
, "emacs: %s: %s\n", term
, errstring
);
752 fprintf (stderr
, "emacs: %s: not a tty\n", term
);
755 fprintf (stderr
, "Using %s\n", term
);
756 #ifdef HAVE_WINDOW_SYSTEM
757 inhibit_window_system
= 1; /* -t => -nw */
761 if (argmatch (argv
, argc
, "-nw", "--no-windows", 6, NULL
, &skip_args
))
762 inhibit_window_system
= 1;
764 /* Handle the -batch switch, which means don't do interactive display. */
766 if (argmatch (argv
, argc
, "-batch", "--batch", 5, NULL
, &skip_args
))
769 /* Handle the --help option, which gives a usage message.. */
770 if (argmatch (argv
, argc
, "-help", "--help", 3, NULL
, &skip_args
))
773 Usage: %s [-t term] [--terminal term] [-nw] [--no-windows] [--batch]\n\
774 [-q] [--no-init-file] [-u user] [--user user] [--debug-init]\n\
775 [--version] [--no-site-file]\n\
776 [-f func] [--funcall func] [-l file] [--load file] [--insert file]\n\
777 [+linenum] file-to-visit [--kill]\n\
778 Report bugs to bug-gnu-emacs@prep.ai.mit.edu. First, please see\n\
779 the Bugs section of the Emacs manual or the file BUGS.\n", argv
[0]);
783 #ifdef HAVE_X_WINDOWS
784 /* Stupid kludge to catch command-line display spec. We can't
785 handle this argument entirely in window system dependent code
786 because we don't even know which window system dependent code
787 to run until we've recognized this argument. */
789 char *displayname
= 0;
791 int count_before
= skip_args
;
793 if (argmatch (argv
, argc
, "-d", "--display", 3, &displayname
, &skip_args
))
795 else if (argmatch (argv
, argc
, "-display", 0, 3, &displayname
, &skip_args
))
798 /* If we have the form --display=NAME,
799 convert it into -d name.
800 This requires inserting a new element into argv. */
801 if (displayname
!= 0 && skip_args
- count_before
== 1)
803 char **new = (char **) xmalloc (sizeof (char *) * (argc
+ 2));
806 for (j
= 0; j
< count_before
+ 1; j
++)
808 new[count_before
+ 1] = "-d";
809 new[count_before
+ 2] = displayname
;
810 for (j
= count_before
+ 2; j
<argc
; j
++)
811 new[j
+ 1] = argv
[j
];
815 /* Change --display to -d, when its arg is separate. */
816 else if (displayname
!= 0 && skip_args
> count_before
817 && argv
[count_before
+ 1][1] == '-')
818 argv
[count_before
+ 1] = "-d";
820 /* Don't actually discard this arg. */
821 skip_args
= count_before
;
825 if (! noninteractive
)
830 inherited_pgroup
= EMACS_GETPGRP (0);
831 setpgrp (0, getpid ());
834 #if defined (USG5) && defined (INTERRUPT_INPUT)
844 /* Don't catch SIGHUP if dumping. */
851 sigblock (sigmask (SIGHUP
));
852 /* In --batch mode, don't catch SIGHUP if already ignored.
853 That makes nohup work. */
855 || signal (SIGHUP
, SIG_IGN
) != SIG_IGN
)
856 signal (SIGHUP
, fatal_error_signal
);
857 sigunblock (sigmask (SIGHUP
));
862 ! noninteractive
|| initialized
868 /* Don't catch these signals in batch mode if dumping.
869 On some machines, this sets static data that would make
870 signal fail to work right when the dumped Emacs is run. */
871 signal (SIGQUIT
, fatal_error_signal
);
872 signal (SIGILL
, fatal_error_signal
);
873 signal (SIGTRAP
, fatal_error_signal
);
875 signal (SIGUSR1
, handle_USR1_signal
);
877 signal (SIGUSR2
, handle_USR2_signal
);
881 signal (SIGABRT
, fatal_error_signal
);
884 signal (SIGHWE
, fatal_error_signal
);
887 signal (SIGPRE
, fatal_error_signal
);
890 signal (SIGORE
, fatal_error_signal
);
893 signal (SIGUME
, fatal_error_signal
);
896 signal (SIGDLK
, fatal_error_signal
);
899 signal (SIGCPULIM
, fatal_error_signal
);
902 /* This is missing on some systems - OS/2, for example. */
903 signal (SIGIOT
, fatal_error_signal
);
906 signal (SIGEMT
, fatal_error_signal
);
908 signal (SIGFPE
, fatal_error_signal
);
910 signal (SIGBUS
, fatal_error_signal
);
912 signal (SIGSEGV
, fatal_error_signal
);
914 signal (SIGSYS
, fatal_error_signal
);
916 signal (SIGTERM
, fatal_error_signal
);
918 signal (SIGXCPU
, fatal_error_signal
);
921 signal (SIGXFSZ
, fatal_error_signal
);
925 /* This just means available memory is getting low. */
926 signal (SIGDANGER
, memory_warning_signal
);
930 /* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU. */
931 signal (SIGXCPU
, fatal_error_signal
);
933 signal (SIGIOINT
, fatal_error_signal
);
935 signal (SIGGRANT
, fatal_error_signal
);
936 signal (SIGRETRACT
, fatal_error_signal
);
937 signal (SIGSOUND
, fatal_error_signal
);
938 signal (SIGMSG
, fatal_error_signal
);
942 noninteractive1
= noninteractive
;
944 /* Perform basic initializations (not merely interning symbols) */
951 init_charset_once ();
953 init_syntax_once (); /* Create standard syntax table. */
954 init_category_once (); /* Create standard category table. */
955 /* Must be done before init_buffer */
956 init_casetab_once ();
957 init_buffer_once (); /* Create buffer table and some buffers */
958 init_minibuf_once (); /* Create list of minibuffers */
959 /* Must precede init_window_once */
960 init_window_once (); /* Init the window system */
966 running_asynch_code
= 0;
969 /* Call early 'cause init_environment needs it. */
971 /* Set defaults for several environment variables. */
973 init_environment (argc
, argv
, skip_args
);
979 /* Initialize environment from registry settings. */
981 init_ntproc (); /* must precede init_editfns */
984 /* egetenv is a pretty low-level facility, which may get called in
985 many circumstances; it seems flimsy to put off initializing it
986 until calling init_callproc. */
987 set_process_environment ();
988 /* AIX crashes are reported in system versions 3.2.3 and 3.2.4
989 if this is not done. Do it after set_process_environment so that we
990 don't pollute Vprocess_environment. */
995 init_buffer (); /* Init default directory of main buffer */
997 init_callproc_1 (); /* Must precede init_cmdargs and init_sys_modes. */
998 init_cmdargs (argc
, argv
, skip_args
); /* Must precede init_lread. */
1002 /* Erase any pre-dump messages in the message log, to avoid confusion */
1003 Lisp_Object old_log_max
;
1004 old_log_max
= Vmessage_log_max
;
1005 XSETFASTINT (Vmessage_log_max
, 0);
1006 message_dolog ("", 0, 1);
1007 Vmessage_log_max
= old_log_max
;
1010 init_callproc (); /* Must follow init_cmdargs but not init_sys_modes. */
1013 if (!noninteractive
)
1016 init_vms_input ();/* init_display calls get_frame_size, that needs this */
1018 init_display (); /* Determine terminal type. init_sys_modes uses results */
1020 init_keyboard (); /* This too must precede init_sys_modes */
1022 init_vmsproc (); /* And this too. */
1024 init_sys_modes (); /* Init system terminal modes (RAW or CBREAK, etc.) */
1028 #ifdef LISP_FLOAT_TYPE
1036 /* Intern the names of all standard functions and variables; define standard keys */
1040 /* The basic levels of Lisp must come first */
1041 /* And data must come first of all
1042 for the sake of symbols like error-message */
1049 syms_of_floatfns ();
1053 syms_of_bytecode ();
1055 syms_of_casefiddle ();
1057 syms_of_callproc ();
1058 syms_of_category ();
1062 #ifndef NO_DIR_LIBRARY
1064 #endif /* not NO_DIR_LIBRARY */
1070 syms_of_coding (); /* This should be after syms_of_fileio. */
1071 #ifdef CLASH_DETECTION
1072 syms_of_filelock ();
1073 #endif /* CLASH_DETECTION */
1076 syms_of_keyboard ();
1081 syms_of_mocklisp ();
1089 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
1090 syms_of_textprop ();
1096 #endif /* WINDOWSNT */
1099 #ifdef HAVE_X_WINDOWS
1106 #endif /* HAVE_X_WINDOWS */
1116 syms_of_w32faces ();
1117 syms_of_w32select ();
1119 #endif /* HAVE_NTGUI */
1129 keys_of_casefiddle ();
1132 keys_of_keyboard ();
1143 /* Handle -l loadup-and-dump, args passed by Makefile. */
1144 if (argmatch (argv
, argc
, "-l", "--load", 3, &file
, &skip_args
))
1145 Vtop_level
= Fcons (intern ("load"),
1146 Fcons (build_string (file
), Qnil
));
1148 /* Unless next switch is -nl, load "loadup.el" first thing. */
1149 if (!argmatch (argv
, argc
, "-nl", "--no-loadup", 6, NULL
, &skip_args
))
1150 Vtop_level
= Fcons (intern ("load"),
1151 Fcons (build_string ("loadup.el"), Qnil
));
1152 #endif /* CANNOT_DUMP */
1159 /* If the execution TZ happens to be the same as the dump TZ,
1160 change it to some other value and then change it back,
1161 to force the underlying implementation to reload the TZ info.
1162 This is needed on implementations that load TZ info from files,
1163 since the TZ file contents may differ between dump and execution. */
1164 char *tz
= getenv ("TZ");
1165 if (tz
&& !strcmp (tz
, dump_tz
))
1175 /* Gerd Moellmann <gerd@acm.org> says this makes profiling work on
1176 FreeBSD. It might work on some other systems too.
1177 Give it a try and tell me if it works on your system. */
1182 extern void _mcleanup ();
1184 extern Lisp_Object
Fredraw_frame ();
1186 /* This uses Fredraw_frame because that function
1187 comes first in the Emacs executable.
1188 It might be better to use something that gives
1189 the start of the text segment, but start_of_text
1190 is not defined on all systems now. */
1191 monstartup (Fredraw_frame
, &etext
);
1200 #ifdef LOCALTIME_CACHE
1201 /* Some versions of localtime have a bug. They cache the value of the time
1202 zone rather than looking it up every time. Since localtime() is
1203 called to bolt the undumping time into the undumped emacs, this
1204 results in localtime ignoring the TZ environment variable.
1205 This flushes the new TZ value into localtime. */
1207 #endif /* defined (LOCALTIME_CACHE) */
1209 /* Enter editor command loop. This never returns. */
1214 /* Sort the args so we can find the most important ones
1215 at the beginning of argv. */
1217 /* First, here's a table of all the standard options. */
1219 struct standard_args
1227 struct standard_args standard_args
[] =
1229 { "-version", "--version", 110, 0 },
1230 { "-help", "--help", 110, 0 },
1231 { "-nl", "--no-shared-memory", 100, 0 },
1233 { "-map", "--map-data", 100, 0 },
1235 { "-t", "--terminal", 90, 1 },
1236 { "-d", "--display", 80, 1 },
1237 { "-display", 0, 80, 1 },
1238 { "-nw", "--no-windows", 70, 0 },
1239 { "-batch", "--batch", 60, 0 },
1240 { "-q", "--no-init-file", 50, 0 },
1241 { "-no-init-file", 0, 50, 0 },
1242 { "-no-site-file", "--no-site-file", 40, 0 },
1243 { "-u", "--user", 30, 1 },
1244 { "-user", 0, 30, 1 },
1245 { "-debug-init", "--debug-init", 20, 0 },
1246 { "-i", "--icon-type", 15, 0 },
1247 { "-itype", 0, 15, 0 },
1248 { "-iconic", "--iconic", 15, 0 },
1249 { "-bg", "--background-color", 10, 1 },
1250 { "-background", 0, 10, 1 },
1251 { "-fg", "--foreground-color", 10, 1 },
1252 { "-foreground", 0, 10, 1 },
1253 { "-bd", "--border-color", 10, 1 },
1254 { "-bw", "--border-width", 10, 1 },
1255 { "-ib", "--internal-border", 10, 1 },
1256 { "-ms", "--mouse-color", 10, 1 },
1257 { "-cr", "--cursor-color", 10, 1 },
1258 { "-fn", "--font", 10, 1 },
1259 { "-font", 0, 10, 1 },
1260 { "-g", "--geometry", 10, 1 },
1261 { "-geometry", 0, 10, 1 },
1262 { "-T", "--title", 10, 1 },
1263 { "-title", 0, 10, 1 },
1264 { "-name", "--name", 10, 1 },
1265 { "-xrm", "--xrm", 10, 1 },
1266 { "-r", "--reverse-video", 5, 0 },
1268 { "-reverse", 0, 5, 0 },
1269 { "-hb", "--horizontal-scroll-bars", 5, 0 },
1270 { "-vb", "--vertical-scroll-bars", 5, 0 },
1271 /* These have the same priority as ordinary file name args,
1272 so they are not reordered with respect to those. */
1273 { "-L", "--directory", 0, 1 },
1274 { "-directory", 0, 0, 1 },
1275 { "-l", "--load", 0, 1 },
1276 { "-load", 0, 0, 1 },
1277 { "-f", "--funcall", 0, 1 },
1278 { "-funcall", 0, 0, 1 },
1279 { "-eval", "--eval", 0, 1 },
1280 { "-find-file", "--find-file", 0, 1 },
1281 { "-visit", "--visit", 0, 1 },
1282 { "-insert", "--insert", 0, 1 },
1283 /* This should be processed after ordinary file name args and the like. */
1284 { "-kill", "--kill", -10, 0 },
1287 /* Reorder the elements of ARGV (assumed to have ARGC elements)
1288 so that the highest priority ones come first.
1289 Do not change the order of elements of equal priority.
1290 If an option takes an argument, keep it and its argument together. */
1293 sort_args (argc
, argv
)
1297 char **new = (char **) xmalloc (sizeof (char *) * argc
);
1298 /* For each element of argv,
1299 the corresponding element of options is:
1300 0 for an option that takes no arguments,
1301 1 for an option that takes one argument, etc.
1302 -1 for an ordinary non-option argument. */
1303 int *options
= (int *) xmalloc (sizeof (int) * argc
);
1304 int *priority
= (int *) xmalloc (sizeof (int) * argc
);
1308 int end_of_options
= argc
;
1310 /* Categorize all the options,
1311 and figure out which argv elts are option arguments. */
1312 for (from
= 1; from
< argc
; from
++)
1316 if (argv
[from
][0] == '-')
1321 /* If we have found "--", don't consider
1322 any more arguments as options. */
1323 if (argv
[from
][1] == '-' && argv
[from
][2] == 0)
1325 /* Leave the "--", and everything following it, at the end. */
1326 for (; from
< argc
; from
++)
1328 priority
[from
] = -100;
1334 /* Look for a match with a known old-fashioned option. */
1335 for (i
= 0; i
< sizeof (standard_args
) / sizeof (standard_args
[0]); i
++)
1336 if (!strcmp (argv
[from
], standard_args
[i
].name
))
1338 options
[from
] = standard_args
[i
].nargs
;
1339 priority
[from
] = standard_args
[i
].priority
;
1340 if (from
+ standard_args
[i
].nargs
>= argc
)
1341 fatal ("Option `%s' requires an argument\n", argv
[from
]);
1342 from
+= standard_args
[i
].nargs
;
1346 /* Look for a match with a known long option.
1347 MATCH is -1 if no match so far, -2 if two or more matches so far,
1348 >= 0 (the table index of the match) if just one match so far. */
1349 if (argv
[from
][1] == '-')
1352 thislen
= strlen (argv
[from
]);
1353 equals
= index (argv
[from
], '=');
1355 thislen
= equals
- argv
[from
];
1358 i
< sizeof (standard_args
) / sizeof (standard_args
[0]); i
++)
1359 if (standard_args
[i
].longname
1360 && !strncmp (argv
[from
], standard_args
[i
].longname
,
1369 /* If we found exactly one match, use that. */
1372 options
[from
] = standard_args
[match
].nargs
;
1373 priority
[from
] = standard_args
[match
].priority
;
1374 /* If --OPTION=VALUE syntax is used,
1375 this option uses just one argv element. */
1378 if (from
+ options
[from
] >= argc
)
1379 fatal ("Option `%s' requires an argument\n", argv
[from
]);
1380 from
+= options
[from
];
1387 /* Copy the arguments, in order of decreasing priority, to NEW. */
1392 int best_priority
= -9999;
1394 /* Find the highest priority remaining option.
1395 If several have equal priority, take the first of them. */
1396 for (from
= 1; from
< argc
; from
++)
1398 if (argv
[from
] != 0 && priority
[from
] > best_priority
)
1400 best_priority
= priority
[from
];
1403 /* Skip option arguments--they are tied to the options. */
1404 if (options
[from
] > 0)
1405 from
+= options
[from
];
1411 /* Copy the highest priority remaining option, with its args, to NEW. */
1412 new[to
++] = argv
[best
];
1413 for (i
= 0; i
< options
[best
]; i
++)
1414 new[to
++] = argv
[best
+ i
+ 1];
1416 /* Clear out this option in ARGV. */
1418 for (i
= 0; i
< options
[best
]; i
++)
1419 argv
[best
+ i
+ 1] = 0;
1422 bcopy (new, argv
, sizeof (char *) * argc
);
1429 DEFUN ("kill-emacs", Fkill_emacs
, Skill_emacs
, 0, 1, "P",
1430 "Exit the Emacs job and kill it.\n\
1431 If ARG is an integer, return ARG as the exit program code.\n\
1432 If ARG is a string, stuff it as keyboard input.\n\n\
1433 The value of `kill-emacs-hook', if not void,\n\
1434 is a list of functions (of no args),\n\
1435 all of which are called before Emacs is actually killed.")
1439 Lisp_Object hook
, hook1
;
1441 struct gcpro gcpro1
;
1448 if (!NILP (Vrun_hooks
) && !noninteractive
)
1449 call1 (Vrun_hooks
, intern ("kill-emacs-hook"));
1453 /* Is it really necessary to do this deassign
1454 when we are going to exit anyway? */
1459 shut_down_emacs (0, 0, STRINGP (arg
) ? arg
: Qnil
);
1461 /* If we have an auto-save list file,
1462 kill it because we are exiting Emacs deliberately (not crashing).
1463 Do it after shut_down_emacs, which does an auto-save. */
1464 if (STRINGP (Vauto_save_list_file_name
))
1465 unlink (XSTRING (Vauto_save_list_file_name
)->data
);
1467 exit (INTEGERP (arg
) ? XINT (arg
)
1478 /* Perform an orderly shutdown of Emacs. Autosave any modified
1479 buffers, kill any child processes, clean up the terminal modes (if
1480 we're in the foreground), and other stuff like that. Don't perform
1481 any redisplay; this may be called when Emacs is shutting down in
1482 the background, or after its X connection has died.
1484 If SIG is a signal number, print a message for it.
1486 This is called by fatal signal handlers, X protocol error handlers,
1490 shut_down_emacs (sig
, no_x
, stuff
)
1494 /* Prevent running of hooks from now on. */
1497 /* If we are controlling the terminal, reset terminal modes */
1498 #ifdef EMACS_HAVE_TTY_PGRP
1500 int pgrp
= EMACS_GETPGRP (0);
1503 if (EMACS_GET_TTY_PGRP (0, &tpgrp
) != -1
1508 if (sig
&& sig
!= SIGTERM
)
1509 fprintf (stderr
, "Fatal error (%d).", sig
);
1517 stuff_buffered_input (stuff
);
1519 kill_buffer_processes (Qnil
);
1520 Fdo_auto_save (Qt
, Qnil
);
1522 #ifdef CLASH_DETECTION
1523 unlock_all_files ();
1527 kill_vms_processes ();
1530 #if 0 /* This triggers a bug in XCloseDisplay and is not needed. */
1531 #ifdef HAVE_X_WINDOWS
1532 /* It's not safe to call intern here. Maybe we are crashing. */
1533 if (!noninteractive
&& SYMBOLP (Vwindow_system
)
1534 && XSYMBOL (Vwindow_system
)->name
->size
== 1
1535 && XSYMBOL (Vwindow_system
)->name
->data
[0] == 'x'
1537 Fx_close_current_connection ();
1538 #endif /* HAVE_X_WINDOWS */
1542 /* There is a tendency for a SIGIO signal to arrive within exit,
1543 and cause a SIGHUP because the input descriptor is already closed. */
1545 signal (SIGIO
, SIG_IGN
);
1563 DEFUN ("dump-emacs-data", Fdump_emacs_data
, Sdump_emacs_data
, 1, 1, 0,
1564 "Dump current state of Emacs into data file FILENAME.\n\
1565 This function exists on systems that use HAVE_SHM.")
1567 Lisp_Object filename
;
1569 extern char my_edata
[];
1572 CHECK_STRING (filename
, 0);
1573 filename
= Fexpand_file_name (filename
, Qnil
);
1576 Vpurify_flag
= Qnil
;
1579 /* Tell malloc where start of impure now is */
1580 /* Also arrange for warnings when nearly out of space. */
1581 #ifndef SYSTEM_MALLOC
1582 memory_warnings (my_edata
, malloc_warning
);
1584 map_out_data (XSTRING (filename
)->data
);
1591 #else /* not HAVE_SHM */
1593 DEFUN ("dump-emacs", Fdump_emacs
, Sdump_emacs
, 2, 2, 0,
1594 "Dump current state of Emacs into executable file FILENAME.\n\
1595 Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\
1596 This is used in the file `loadup.el' when building Emacs.\n\
1598 You must run Emacs in batch mode in order to dump it.")
1600 Lisp_Object filename
, symfile
;
1602 extern char my_edata
[];
1605 int count
= specpdl_ptr
- specpdl
;
1607 if (! noninteractive
)
1608 error ("Dumping Emacs works only in batch mode");
1610 /* Bind `command-line-processed' to nil before dumping,
1611 so that the dumped Emacs will process its command line
1612 and set up to work with X windows if appropriate. */
1613 symbol
= intern ("command-line-process");
1614 specbind (symbol
, Qnil
);
1616 CHECK_STRING (filename
, 0);
1617 filename
= Fexpand_file_name (filename
, Qnil
);
1618 if (!NILP (symfile
))
1620 CHECK_STRING (symfile
, 0);
1621 if (XSTRING (symfile
)->size
)
1622 symfile
= Fexpand_file_name (symfile
, Qnil
);
1626 Vpurify_flag
= Qnil
;
1629 set_time_zone_rule (dump_tz
);
1630 #ifndef LOCALTIME_CACHE
1631 /* Force a tz reload, since set_time_zone_rule doesn't. */
1638 mapout_data (XSTRING (filename
)->data
);
1640 /* Tell malloc where start of impure now is */
1641 /* Also arrange for warnings when nearly out of space. */
1642 #ifndef SYSTEM_MALLOC
1644 /* On Windows, this was done before dumping, and that once suffices.
1645 Meanwhile, my_edata is not valid on Windows. */
1646 memory_warnings (my_edata
, malloc_warning
);
1647 #endif /* not WINDOWSNT */
1649 #ifdef DOUG_LEA_MALLOC
1650 malloc_state_ptr
= malloc_get_state ();
1652 unexec (XSTRING (filename
)->data
,
1653 !NILP (symfile
) ? XSTRING (symfile
)->data
: 0, my_edata
, 0, 0);
1654 #ifdef DOUG_LEA_MALLOC
1655 free (malloc_state_ptr
);
1657 #endif /* not VMS */
1661 return unbind_to (count
, Qnil
);
1664 #endif /* not HAVE_SHM */
1666 #endif /* not CANNOT_DUMP */
1673 decode_env_path (evarname
, defalt
)
1674 char *evarname
, *defalt
;
1676 register char *path
, *p
;
1677 Lisp_Object lpath
, element
, tem
;
1679 /* It's okay to use getenv here, because this function is only used
1680 to initialize variables when Emacs starts up, and isn't called
1683 path
= (char *) getenv (evarname
);
1689 /* Ensure values from the environment use the proper directory separator. */
1692 p
= alloca (strlen (path
) + 1);
1696 if ('/' == DIRECTORY_SEP
)
1697 dostounix_filename (path
);
1699 unixtodos_filename (path
);
1705 p
= index (path
, SEPCHAR
);
1706 if (!p
) p
= path
+ strlen (path
);
1707 element
= (p
- path
? make_string (path
, p
- path
)
1708 : build_string ("."));
1710 /* Add /: to the front of the name
1711 if it would otherwise be treated as magic. */
1712 tem
= Ffind_file_name_handler (element
, Qt
);
1714 element
= concat2 (build_string ("/:"), element
);
1716 lpath
= Fcons (element
, lpath
);
1722 return Fnreverse (lpath
);
1727 Qfile_name_handler_alist
= intern ("file-name-handler-alist");
1728 staticpro (&Qfile_name_handler_alist
);
1732 defsubr (&Sdump_emacs_data
);
1734 defsubr (&Sdump_emacs
);
1738 defsubr (&Skill_emacs
);
1740 defsubr (&Sinvocation_name
);
1741 defsubr (&Sinvocation_directory
);
1743 DEFVAR_LISP ("command-line-args", &Vcommand_line_args
,
1744 "Args passed by shell to Emacs, as a list of strings.");
1746 DEFVAR_LISP ("system-type", &Vsystem_type
,
1747 "Value is symbol indicating type of operating system you are using.");
1748 Vsystem_type
= intern (SYSTEM_TYPE
);
1750 DEFVAR_LISP ("system-configuration", &Vsystem_configuration
,
1751 "Value is string indicating configuration Emacs was built for.");
1752 Vsystem_configuration
= build_string (EMACS_CONFIGURATION
);
1754 DEFVAR_LISP ("system-configuration-options", &Vsystem_configuration_options
,
1755 "String containing the configuration options Emacs was built with.");
1756 Vsystem_configuration_options
= build_string (EMACS_CONFIG_OPTIONS
);
1758 DEFVAR_BOOL ("noninteractive", &noninteractive1
,
1759 "Non-nil means Emacs is running without interactive terminal.");
1761 DEFVAR_LISP ("kill-emacs-hook", &Vkill_emacs_hook
,
1762 "Hook to be run whenever kill-emacs is called.\n\
1763 Since kill-emacs may be invoked when the terminal is disconnected (or\n\
1764 in other similar situations), functions placed on this hook should not\n\
1765 expect to be able to interact with the user. To ask for confirmation,\n\
1766 see `kill-emacs-query-functions' instead.");
1767 Vkill_emacs_hook
= Qnil
;
1770 DEFVAR_LISP ("signal-USR1-hook", &Vsignal_USR1_hook
,
1771 "Hook to be run whenever emacs recieves a USR1 signal");
1772 Vsignal_USR1_hook
= Qnil
;
1774 DEFVAR_LISP ("signal-USR2-hook", &Vsignal_USR2_hook
,
1775 "Hook to be run whenever emacs recieves a USR2 signal");
1776 Vsignal_USR2_hook
= Qnil
;
1781 DEFVAR_INT ("emacs-priority", &emacs_priority
,
1782 "Priority for Emacs to run at.\n\
1783 This value is effective only if set before Emacs is dumped,\n\
1784 and only if the Emacs executable is installed with setuid to permit\n\
1785 it to change priority. (Emacs sets its uid back to the real uid.)\n\
1786 Currently, you need to define SET_EMACS_PRIORITY in `config.h'\n\
1787 before you compile Emacs, to enable the code for this feature.");
1790 DEFVAR_LISP ("invocation-name", &Vinvocation_name
,
1791 "The program name that was used to run Emacs.\n\
1792 Any directory names are omitted.");
1794 DEFVAR_LISP ("invocation-directory", &Vinvocation_directory
,
1795 "The directory in which the Emacs executable was found, to run it.\n\
1796 The value is nil if that directory's name is not known.");
1798 DEFVAR_LISP ("installation-directory", &Vinstallation_directory
,
1799 "A directory within which to look for the `lib-src' and `etc' directories.\n\
1800 This is non-nil when we can't find those directories in their standard\n\
1801 installed locations, but we can find them\n\
1802 near where the Emacs executable was found.");
1803 Vinstallation_directory
= Qnil
;