1 /* Fully extensible Emacs, running on Unix, intended for GNU.
2 Copyright (C) 1985, 1986, 1987, 1992, 1993 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
27 #include <sys/types.h>
35 #include <sys/ioctl.h>
44 #include <default_acl.h>
50 #include "intervals.h"
58 #define PRIO_PROCESS 0
60 /* Command line args from shell, as list of strings */
61 Lisp_Object Vcommand_line_args
;
63 /* Hook run by `kill-emacs' before it does really anything. */
64 Lisp_Object Vkill_emacs_hook
;
66 /* Set nonzero after Emacs has started up the first time.
67 Prevents reinitialization of the Lisp world and keymaps
68 on subsequent starts. */
71 /* Variable whose value is symbol giving operating system type */
72 Lisp_Object Vsystem_type
;
74 /* If non-zero, emacs should not attempt to use an window-specific code,
75 but instead should use the virtual terminal under which it was started */
76 int inhibit_window_system
;
78 /* If nonzero, set Emacs to run at this priority. This is also used
79 in child_setup and sys_suspend to make sure subshells run at normal
80 priority; Those functions have their own extern declaration. */
84 /* If non-zero, -d was specified, meaning we're using some window system. */
88 /* An address near the bottom of the stack.
89 Tells GC how to save a copy of the stack. */
93 extern Lisp_Object Vwindow_system
;
94 #endif /* HAVE_X_WINDOWS */
96 #ifdef USG_SHARED_LIBRARIES
97 /* If nonzero, this is the place to put the end of the writable segment
100 unsigned int bss_end
= 0;
103 /* Nonzero means running Emacs without interactive terminal. */
107 /* Value of Lisp variable `noninteractive'.
108 Normally same as C variable `noninteractive'
109 but nothing terrible happens if user sets this one. */
113 /* Signal code for the fatal signal that was received */
114 int fatal_error_code
;
116 /* Nonzero if handling a fatal error already */
117 int fatal_error_in_progress
;
119 /* Handle bus errors, illegal instruction, etc. */
121 fatal_error_signal (sig
)
124 fatal_error_code
= sig
;
125 signal (sig
, SIG_DFL
);
127 /* If fatal error occurs in code below, avoid infinite recursion. */
128 if (fatal_error_in_progress
)
129 kill (getpid (), fatal_error_code
);
131 fatal_error_in_progress
= 1;
133 shut_down_emacs (sig
);
136 LIB$
STOP (SS$_ABORT
);
138 /* Signal the same code; this time it will really be fatal. */
139 kill (getpid (), fatal_error_code
);
143 /* Code for dealing with Lisp access to the Unix command line */
146 init_cmdargs (argc
, argv
, skip_args
)
153 Vcommand_line_args
= Qnil
;
155 for (i
= argc
- 1; i
>= 0; i
--)
157 if (i
== 0 || i
> skip_args
)
159 = Fcons (build_string (argv
[i
]), Vcommand_line_args
);
164 #ifdef LINK_CRTL_SHARE
165 #ifdef SHAREABLE_LIB_BUG
166 extern noshare
char **environ
;
167 #endif /* SHAREABLE_LIB_BUG */
168 #endif /* LINK_CRTL_SHARE */
171 /* We don't include crtbegin.o and crtend.o in the link,
172 so these functions and variables might be missed.
173 Provide dummy definitions to avoid error.
174 (We don't have any real constructors or destructors.) */
178 __do_global_ctors_aux ()
182 char * __CTOR_LIST__
[2] = { (char *) (-1), 0 };
183 char * __DTOR_LIST__
[2] = { (char *) (-1), 0 };
186 #endif /* __GNUC__ */
189 main (argc
, argv
, envp
)
194 char stack_bottom_variable
;
198 extern char *sys_errlist
[];
199 extern void malloc_warning ();
201 /* Map in shared memory, if we are using that. */
203 if (argc
> 1 && !strcmp (argv
[1], "-nl"))
206 /* The shared memory was just restored, which clobbered this. */
212 /* The shared memory was just restored, which clobbered this. */
218 static int malloc_cookie
;
220 /* This helps out unexnext.c. */
222 if (malloc_jumpstart (malloc_cookie
) != 0)
223 printf ("malloc jumpstart failed!\n");
226 #ifdef HAVE_X_WINDOWS
227 /* Stupid kludge to catch command-line display spec. We can't
228 handle this argument entirely in window system dependent code
229 because we don't even know which window system dependent code
230 to run until we've recognized this argument. */
234 for (i
= 1; (i
< argc
&& ! display_arg
); i
++)
235 if (!strcmp (argv
[i
], "-d"))
241 /* If -map specified, map the data file in */
242 if (argc
> 2 && ! strcmp (argv
[1], "-map"))
245 mapin_data (argv
[2]);
248 #ifdef LINK_CRTL_SHARE
249 #ifdef SHAREABLE_LIB_BUG
250 /* Bletcherous shared libraries! */
252 stdin
= fdopen (0, "r");
254 stdout
= fdopen (1, "w");
256 stderr
= fdopen (2, "w");
259 #endif /* SHAREABLE_LIB_BUG */
260 #endif /* LINK_CRTL_SHARE */
263 /* Record (approximately) where the stack begins. */
264 stack_bottom
= &stack_bottom_variable
;
266 #ifdef RUN_TIME_REMAP
268 run_time_remap (argv
[0]);
271 #ifdef USG_SHARED_LIBRARIES
278 setpgrp (0, getpid ());
283 /* If USE_DOMAIN_ACLS environment variable exists,
284 use ACLs rather than UNIX modes. */
285 if (egetenv ("USE_DOMAIN_ACLS"))
286 default_acl (USE_DEFACL
);
290 #ifndef SYSTEM_MALLOC
292 memory_warnings (0, malloc_warning
);
293 #endif /* not SYSTEM_MALLOC */
297 nice (emacs_priority
);
299 #endif /* PRIO_PROCESS */
302 /* interrupt_input has trouble if we aren't in a separate process group. */
303 setpgrp (getpid (), getpid ());
306 inhibit_window_system
= 0;
308 /* Handle the -t switch, which specifies filename to use as terminal */
309 if (skip_args
+ 2 < argc
&& !strcmp (argv
[skip_args
+ 1], "-t"))
315 result
= open (argv
[skip_args
], O_RDWR
, 2 );
320 if (errno
>= 0 && errno
< sys_nerr
)
321 errstring
= sys_errlist
[errno
];
323 errstring
= "undocumented error code";
324 fprintf (stderr
, "emacs: %s: %s\n", argv
[skip_args
], errstring
);
330 fprintf (stderr
, "emacs: %s: not a tty\n", argv
[skip_args
]);
333 fprintf (stderr
, "Using %s\n", argv
[skip_args
]);
334 #ifdef HAVE_X_WINDOWS
335 inhibit_window_system
= 1; /* -t => -nw */
339 if (skip_args
+ 1 < argc
340 && (!strcmp (argv
[skip_args
+ 1], "-nw")))
343 inhibit_window_system
= 1;
346 /* Handle the -batch switch, which means don't do interactive display. */
348 if (skip_args
+ 1 < argc
&& !strcmp (argv
[skip_args
+ 1], "-batch"))
360 ! noninteractive
|| initialized
366 /* Don't catch these signals in batch mode if not initialized.
367 On some machines, this sets static data that would make
368 signal fail to work right when the dumped Emacs is run. */
369 signal (SIGHUP
, fatal_error_signal
);
370 signal (SIGQUIT
, fatal_error_signal
);
371 signal (SIGILL
, fatal_error_signal
);
372 signal (SIGTRAP
, fatal_error_signal
);
373 signal (SIGIOT
, fatal_error_signal
);
375 signal (SIGEMT
, fatal_error_signal
);
377 signal (SIGFPE
, fatal_error_signal
);
378 signal (SIGBUS
, fatal_error_signal
);
379 signal (SIGSEGV
, fatal_error_signal
);
380 signal (SIGSYS
, fatal_error_signal
);
381 signal (SIGTERM
, fatal_error_signal
);
383 signal (SIGXCPU
, fatal_error_signal
);
386 signal (SIGXFSZ
, fatal_error_signal
);
390 signal (SIGDANGER
, fatal_error_signal
);
391 signal (20, fatal_error_signal
);
392 signal (21, fatal_error_signal
);
393 signal (22, fatal_error_signal
);
394 signal (23, fatal_error_signal
);
395 signal (24, fatal_error_signal
);
397 signal (SIGAIO
, fatal_error_signal
);
398 signal (SIGPTY
, fatal_error_signal
);
400 signal (SIGIOINT
, fatal_error_signal
);
401 signal (SIGGRANT
, fatal_error_signal
);
402 signal (SIGRETRACT
, fatal_error_signal
);
403 signal (SIGSOUND
, fatal_error_signal
);
404 signal (SIGMSG
, fatal_error_signal
);
408 noninteractive1
= noninteractive
;
410 /* Perform basic initializations (not merely interning symbols) */
417 init_syntax_once (); /* Create standard syntax table. */
418 /* Must be done before init_buffer */
419 init_casetab_once ();
420 init_buffer_once (); /* Create buffer table and some buffers */
421 init_minibuf_once (); /* Create list of minibuffers */
422 /* Must precede init_window_once */
423 init_window_once (); /* Init the window system */
431 init_cmdargs (argc
, argv
, skip_args
); /* Create list Vcommand_line_args */
432 init_buffer (); /* Init default directory of main buffer */
436 init_vms_input ();/* init_display calls get_frame_size, that needs this */
438 init_display (); /* Determine terminal type. init_sys_modes uses results */
440 init_keyboard (); /* This too must precede init_sys_modes */
441 init_callproc (); /* And this too. */
443 init_vmsproc (); /* And this too. */
445 init_sys_modes (); /* Init system terminal modes (RAW or CBREAK, etc.) */
449 #ifdef LISP_FLOAT_TYPE
456 #ifdef CLASH_DETECTION
458 #endif /* CLASH_DETECTION */
460 /* Intern the names of all standard functions and variables; define standard keys */
464 /* The basic levels of Lisp must come first */
465 /* And data must come first of all
466 for the sake of symbols like error-message */
473 #ifdef LISP_FLOAT_TYPE
481 syms_of_casefiddle ();
485 #ifndef NO_DIR_LIBRARY
487 #endif /* not NO_DIR_LIBRARY */
493 #ifdef CLASH_DETECTION
495 #endif /* CLASH_DETECTION */
509 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
516 #ifdef HAVE_X_WINDOWS
522 #ifdef HAVE_X_WINDOWS
525 #endif /* not NO_X_MENU */
526 #endif /* HAVE_X_MENU */
527 #endif /* HAVE_X_WINDOWS */
537 keys_of_casefiddle ();
550 /* Handle -l loadup-and-dump, args passed by Makefile. */
551 if (argc
> 2 + skip_args
&& !strcmp (argv
[1 + skip_args
], "-l"))
552 Vtop_level
= Fcons (intern ("load"),
553 Fcons (build_string (argv
[2 + skip_args
]), Qnil
));
555 /* Unless next switch is -nl, load "loadup.el" first thing. */
556 if (!(argc
> 1 + skip_args
&& !strcmp (argv
[1 + skip_args
], "-nl")))
557 Vtop_level
= Fcons (intern ("load"),
558 Fcons (build_string ("loadup.el"), Qnil
));
559 #endif /* CANNOT_DUMP */
565 /* sun's localtime() has a bug. it caches the value of the time
566 zone rather than looking it up every time. Since localtime() is
567 called to bolt the undumping time into the undumped emacs, this
568 results in localtime() ignoring the TZ environment variable.
569 This flushes the new TZ value into localtime(). */
573 /* Enter editor command loop. This never returns. */
578 DEFUN ("kill-emacs", Fkill_emacs
, Skill_emacs
, 0, 1, "P",
579 "Exit the Emacs job and kill it.\n\
580 If ARG is an integer, return ARG as the exit program code.\n\
581 If ARG is a string, stuff it as keyboard input.\n\n\
582 The value of `kill-emacs-hook', if not void,\n\
583 is a list of functions (of no args),\n\
584 all of which are called before Emacs is actually killed.")
588 Lisp_Object hook
, hook1
;
597 if (!NILP (Vrun_hooks
) && !noninteractive
)
598 call1 (Vrun_hooks
, intern ("kill-emacs-hook"));
600 #ifdef HAVE_X_WINDOWS
601 if (!noninteractive
&& EQ (Vwindow_system
, intern ("x")))
602 Fx_close_current_connection ();
603 #endif /* HAVE_X_WINDOWS */
607 /* Is it really necessary to do this deassign
608 when we are going to exit anyway? */
612 stuff_buffered_input (arg
);
616 exit ((XTYPE (arg
) == Lisp_Int
) ? XINT (arg
)
627 /* Perform an orderly shutdown of Emacs. Autosave any modified
628 buffers, kill any child processes, clean up the terminal modes (if
629 we're in the foreground), and other stuff like that. Don't perform
630 any redisplay; this may be called when Emacs is shutting down in
631 the background, or after its X connection has died.
633 If SIG is a signal number, print a message for it.
635 This is called by fatal signal handlers, X protocol error handlers,
638 shut_down_emacs (sig
)
641 /* If we are controlling the terminal, reset terminal modes */
642 #ifdef EMACS_HAVE_TTY_PGRP
645 if (EMACS_GET_TTY_PGRP (0, &tpgrp
) != -1
646 && tpgrp
== getpgrp (0))
650 if (sig
&& sig
!= SIGTERM
)
651 fprintf (stderr
, "Fatal error (%d).", sig
);
659 kill_buffer_processes (Qnil
);
660 Fdo_auto_save (Qt
, Qnil
);
662 #ifdef CLASH_DETECTION
667 kill_vms_processes ();
671 /* There is a tendency for a SIGIO signal to arrive within exit,
672 and cause a SIGHUP because the input descriptor is already closed. */
674 signal (SIGIO
, SIG_IGN
);
681 /* Nothing like this can be implemented on an Apollo.
686 DEFUN ("dump-emacs-data", Fdump_emacs_data
, Sdump_emacs_data
, 1, 1, 0,
687 "Dump current state of Emacs into data file FILENAME.\n\
688 This function exists on systems that use HAVE_SHM.")
690 Lisp_Object intoname
;
694 extern void malloc_warning ();
696 CHECK_STRING (intoname
, 0);
697 intoname
= Fexpand_file_name (intoname
, Qnil
);
703 /* Tell malloc where start of impure now is */
704 /* Also arrange for warnings when nearly out of space. */
705 #ifndef SYSTEM_MALLOC
706 memory_warnings (&my_edata
, malloc_warning
);
708 map_out_data (XSTRING (intoname
)->data
);
715 #else /* not HAVE_SHM */
717 DEFUN ("dump-emacs", Fdump_emacs
, Sdump_emacs
, 2, 2, 0,
718 "Dump current state of Emacs into executable file FILENAME.\n\
719 Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\
720 This is used in the file `loadup.el' when building Emacs.\n\
722 Bind `command-line-processed' to nil before dumping,\n\
723 if you want the dumped Emacs to process its command line\n\
724 and announce itself normally when it is run.")
726 Lisp_Object intoname
, symname
;
730 extern void malloc_warning ();
732 CHECK_STRING (intoname
, 0);
733 intoname
= Fexpand_file_name (intoname
, Qnil
);
736 CHECK_STRING (symname
, 0);
737 if (XSTRING (symname
)->size
)
738 symname
= Fexpand_file_name (symname
, Qnil
);
746 mapout_data (XSTRING (intoname
)->data
);
748 /* Tell malloc where start of impure now is */
749 /* Also arrange for warnings when nearly out of space. */
750 #ifndef SYSTEM_MALLOC
751 memory_warnings (&my_edata
, malloc_warning
);
753 unexec (XSTRING (intoname
)->data
,
754 !NILP (symname
) ? XSTRING (symname
)->data
: 0, &my_edata
, 0, 0);
762 #endif /* not HAVE_SHM */
764 #endif /* not CANNOT_DUMP */
773 decode_env_path (evarname
, defalt
)
774 char *evarname
, *defalt
;
776 register char *path
, *p
;
777 extern char *index ();
781 /* It's okay to use getenv here, because this function is only used
782 to initialize variables when Emacs starts up, and isn't called
785 path
= (char *) getenv (evarname
);
793 p
= index (path
, SEPCHAR
);
794 if (!p
) p
= path
+ strlen (path
);
795 lpath
= Fcons (p
- path
? make_string (path
, p
- path
) : Qnil
,
802 return Fnreverse (lpath
);
808 defsubr (&Sdump_emacs_data
);
810 defsubr (&Sdump_emacs
);
813 defsubr (&Skill_emacs
);
815 DEFVAR_LISP ("command-line-args", &Vcommand_line_args
,
816 "Args passed by shell to Emacs, as a list of strings.");
818 DEFVAR_LISP ("system-type", &Vsystem_type
,
819 "Value is symbol indicating type of operating system you are using.");
820 Vsystem_type
= intern (SYSTEM_TYPE
);
822 DEFVAR_BOOL ("noninteractive", &noninteractive1
,
823 "Non-nil means Emacs is running without interactive terminal.");
825 DEFVAR_LISP ("kill-emacs-hook", &Vkill_emacs_hook
,
826 "Hook to be run whenever kill-emacs is called.\n\
827 Since kill-emacs may be invoked when the terminal is disconnected (or\n\
828 in other similar situations), functions placed on this hook should not\n\
829 not expect to be able to interact with the user.");
830 Vkill_emacs_hook
= Qnil
;
832 DEFVAR_INT ("emacs-priority", &emacs_priority
,
833 "Priority for Emacs to run at.\n\
834 This value is effective only if set before Emacs is dumped,\n\
835 and only if the Emacs executable is installed with setuid to permit\n\
836 it to change priority. (Emacs sets its uid back to the real uid.)");