1 /* Fully extensible Emacs, running on Unix, intended for GNU.
2 Copyright (C) 1985, 1986, 1987, 1992 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 1, 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>
39 #include <sys/ioctl.h>
48 #include <default_acl.h>
61 #define PRIO_PROCESS 0
63 /* Command line args from shell, as list of strings */
64 Lisp_Object Vcommand_line_args
;
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
;
79 /* If non-zero, -d was specified, meaning we're using some window system. */
83 /* An address near the bottom of the stack.
84 Tells GC how to save a copy of the stack. */
88 extern Lisp_Object Vwindow_system
;
89 #endif /* HAVE_X_WINDOWS */
91 #ifdef USG_SHARED_LIBRARIES
92 /* If nonzero, this is the place to put the end of the writable segment
95 unsigned int bss_end
= 0;
98 /* Nonzero means running Emacs without interactive terminal. */
102 /* Value of Lisp variable `noninteractive'.
103 Normally same as C variable `noninteractive'
104 but nothing terrible happens if user sets this one. */
108 /* Signal code for the fatal signal that was received */
109 int fatal_error_code
;
111 /* Nonzero if handling a fatal error already */
112 int fatal_error_in_progress
;
114 /* Handle bus errors, illegal instruction, etc. */
116 fatal_error_signal (sig
)
119 fatal_error_code
= sig
;
120 signal (sig
, SIG_DFL
);
122 /* If fatal error occurs in code below, avoid infinite recursion. */
123 if (fatal_error_in_progress
)
124 kill (getpid (), fatal_error_code
);
126 fatal_error_in_progress
= 1;
128 /* If we are controlling the terminal, reset terminal modes */
129 #ifdef EMACS_HAVE_TTY_PGRP
132 if (EMACS_GET_TTY_PGRP (0, &tpgrp
) != -1
133 && tpgrp
== getpgrp (0))
137 fprintf (stderr
, "Fatal error (%d).", sig
);
140 #endif /* uses pgrp */
143 kill_buffer_processes (Qnil
);
144 Fdo_auto_save (Qt
, Qnil
);
146 #ifdef CLASH_DETECTION
148 #endif /* CLASH_DETECTION */
151 kill_vms_processes ();
152 LIB$
STOP (SS$_ABORT
);
154 /* Signal the same code; this time it will really be fatal. */
155 kill (getpid (), fatal_error_code
);
159 /* Code for dealing with Lisp access to the Unix command line */
162 init_cmdargs (argc
, argv
, skip_args
)
169 Vcommand_line_args
= Qnil
;
171 for (i
= argc
- 1; i
>= 0; i
--)
173 if (i
== 0 || i
> skip_args
)
175 = Fcons (build_string (argv
[i
]), Vcommand_line_args
);
180 #ifdef LINK_CRTL_SHARE
181 #ifdef SHAREABLE_LIB_BUG
182 extern noshare
char **environ
;
183 #endif /* SHAREABLE_LIB_BUG */
184 #endif /* LINK_CRTL_SHARE */
188 main (argc
, argv
, envp
)
193 char stack_bottom_variable
;
197 extern char *sys_errlist
[];
198 extern void malloc_warning ();
200 /* Map in shared memory, if we are using that. */
202 if (argc
> 1 && !strcmp (argv
[1], "-nl"))
205 /* The shared memory was just restored, which clobbered this. */
211 /* The shared memory was just restored, which clobbered this. */
216 #ifdef HAVE_X_WINDOWS
217 /* Stupid kludge to catch command-line display spec. We can't
218 handle this argument entirely in window system dependent code
219 because we don't even know which window system dependent code
220 to run until we've recognized this argument. */
224 for (i
= 1; (i
< argc
&& ! display_arg
); i
++)
225 if (!strcmp (argv
[i
], "-d"))
231 /* If -map specified, map the data file in */
232 if (argc
> 2 && ! strcmp (argv
[1], "-map"))
235 mapin_data (argv
[2]);
238 #ifdef LINK_CRTL_SHARE
239 #ifdef SHAREABLE_LIB_BUG
240 /* Bletcherous shared libraries! */
242 stdin
= fdopen (0, "r");
244 stdout
= fdopen (1, "w");
246 stderr
= fdopen (2, "w");
249 #endif /* SHAREABLE_LIB_BUG */
250 #endif /* LINK_CRTL_SHARE */
253 /* Record (approximately) where the stack begins. */
254 stack_bottom
= &stack_bottom_variable
;
256 #ifdef RUN_TIME_REMAP
258 run_time_remap (argv
[0]);
261 #ifdef USG_SHARED_LIBRARIES
268 setpgrp (0, getpid ());
273 /* If USE_DOMAIN_ACLS environment variable exists,
274 use ACLs rather than UNIX modes. */
275 if (egetenv ("USE_DOMAIN_ACLS"))
276 default_acl (USE_DEFACL
);
280 #ifndef SYSTEM_MALLOC
282 malloc_init (0, malloc_warning
);
283 #endif /* not SYSTEM_MALLOC */
286 setpriority (PRIO_PROCESS
, getpid (), HIGHPRI
);
291 /* interrupt_input has trouble if we aren't in a separate process group. */
292 setpgrp (getpid (), getpid ());
295 inhibit_window_system
= 0;
297 /* Handle the -t switch, which specifies filename to use as terminal */
298 if (skip_args
+ 2 < argc
&& !strcmp (argv
[skip_args
+ 1], "-t"))
304 result
= open (argv
[skip_args
], O_RDWR
, 2 );
309 if (errno
>= 0 && errno
< sys_nerr
)
310 errstring
= sys_errlist
[errno
];
312 errstring
= "undocumented error code";
313 fprintf (stderr
, "emacs: %s: %s\n", argv
[skip_args
], errstring
);
319 fprintf (stderr
, "emacs: %s: not a tty\n", argv
[skip_args
]);
322 fprintf (stderr
, "Using %s\n", argv
[skip_args
]);
323 #ifdef HAVE_X_WINDOWS
324 inhibit_window_system
= 1; /* -t => -nw */
328 if (skip_args
+ 1 < argc
329 && (!strcmp (argv
[skip_args
+ 1], "-nw")))
332 inhibit_window_system
= 1;
335 /* Handle the -batch switch, which means don't do interactive display. */
337 if (skip_args
+ 1 < argc
&& !strcmp (argv
[skip_args
+ 1], "-batch"))
349 ! noninteractive
|| initialized
355 /* Don't catch these signals in batch mode if not initialized.
356 On some machines, this sets static data that would make
357 signal fail to work right when the dumped Emacs is run. */
358 signal (SIGHUP
, fatal_error_signal
);
359 signal (SIGQUIT
, fatal_error_signal
);
360 signal (SIGILL
, fatal_error_signal
);
361 signal (SIGTRAP
, fatal_error_signal
);
362 signal (SIGIOT
, fatal_error_signal
);
364 signal (SIGEMT
, fatal_error_signal
);
366 signal (SIGFPE
, fatal_error_signal
);
367 signal (SIGBUS
, fatal_error_signal
);
368 signal (SIGSEGV
, fatal_error_signal
);
369 signal (SIGSYS
, fatal_error_signal
);
370 signal (SIGTERM
, fatal_error_signal
);
372 signal (SIGXCPU
, fatal_error_signal
);
375 signal (SIGXFSZ
, fatal_error_signal
);
379 signal (SIGDANGER
, fatal_error_signal
);
380 signal (20, fatal_error_signal
);
381 signal (21, fatal_error_signal
);
382 signal (22, fatal_error_signal
);
383 signal (23, fatal_error_signal
);
384 signal (24, fatal_error_signal
);
386 signal (SIGAIO
, fatal_error_signal
);
387 signal (SIGPTY
, fatal_error_signal
);
389 signal (SIGIOINT
, fatal_error_signal
);
390 signal (SIGGRANT
, fatal_error_signal
);
391 signal (SIGRETRACT
, fatal_error_signal
);
392 signal (SIGSOUND
, fatal_error_signal
);
393 signal (SIGMSG
, fatal_error_signal
);
397 noninteractive1
= noninteractive
;
399 /* Perform basic initializations (not merely interning symbols) */
406 init_syntax_once (); /* Create standard syntax table. */
407 /* Must be done before init_buffer */
408 init_casetab_once ();
409 init_buffer_once (); /* Create buffer table and some buffers */
410 init_minibuf_once (); /* Create list of minibuffers */
411 /* Must precede init_window_once */
412 init_window_once (); /* Init the window system */
420 init_cmdargs (argc
, argv
, skip_args
); /* Create list Vcommand_line_args */
421 init_buffer (); /* Init default directory of main buffer */
425 init_vms_input ();/* init_display calls get_screen_size, that needs this */
427 init_display (); /* Determine terminal type. init_sys_modes uses results */
429 init_keyboard (); /* This too must precede init_sys_modes */
430 init_callproc (); /* And this too. */
432 init_vmsproc (); /* And this too. */
434 init_sys_modes (); /* Init system terminal modes (RAW or CBREAK, etc.) */
438 #ifdef LISP_FLOAT_TYPE
446 /* Intern the names of all standard functions and variables; define standard keys */
450 /* The basic levels of Lisp must come first */
451 /* And data must come first of all
452 for the sake of symbols like error-message */
459 #ifdef LISP_FLOAT_TYPE
467 syms_of_casefiddle ();
471 #ifndef NO_DIR_LIBRARY
473 #endif /* not NO_DIR_LIBRARY */
479 #ifdef CLASH_DETECTION
481 #endif /* CLASH_DETECTION */
501 #ifdef HAVE_X_WINDOWS
509 #endif /* HAVE_X_MENU */
510 #endif /* HAVE_X_WINDOWS */
520 keys_of_casefiddle ();
532 /* Handle -l loadup-and-dump, args passed by Makefile. */
533 if (argc
> 2 + skip_args
&& !strcmp (argv
[1 + skip_args
], "-l"))
534 Vtop_level
= Fcons (intern ("load"),
535 Fcons (build_string (argv
[2 + skip_args
]), Qnil
));
537 /* Unless next switch is -nl, load "loadup.el" first thing. */
538 if (!(argc
> 1 + skip_args
&& !strcmp (argv
[1 + skip_args
], "-nl")))
539 Vtop_level
= Fcons (intern ("load"),
540 Fcons (build_string ("loadup.el"), Qnil
));
541 #endif /* CANNOT_DUMP */
546 /* Enter editor command loop. This never returns. */
551 DEFUN ("kill-emacs", Fkill_emacs
, Skill_emacs
, 0, 1, "P",
552 "Exit the Emacs job and kill it. Ask for confirmation, without argument.\n\
553 If ARG is an integer, return ARG as the exit program code.\n\
554 If ARG is a string, stuff it as keyboard input.\n\n\
555 The value of `kill-emacs-hook', if not void,\n\
556 is a list of functions (of no args),\n\
557 all of which are called before Emacs is actually killed.")
561 Lisp_Object hook
, hook1
;
570 if (!NILP (Vrun_hooks
) && !noninteractive
)
571 call1 (Vrun_hooks
, intern ("kill-emacs-hook"));
573 kill_buffer_processes (Qnil
);
576 kill_vms_processes ();
579 Fdo_auto_save (Qt
, Qnil
);
581 #ifdef CLASH_DETECTION
583 #endif /* CLASH_DETECTION */
588 #ifdef HAVE_X_WINDOWS
589 if (!noninteractive
&& EQ (Vwindow_system
, intern ("x")))
590 Fx_close_current_connection ();
591 #endif /* HAVE_X_WINDOWS */
595 /* Is it really necessary to do this deassign
596 when we are going to exit anyway? */
600 stuff_buffered_input (arg
);
602 /* There is a tendency for a SIGIO signal to arrive within exit,
603 and cause a SIGHUP because the input descriptor is already closed. */
605 signal (SIGIO
, SIG_IGN
);
607 exit ((XTYPE (arg
) == Lisp_Int
) ? XINT (arg
)
618 /* Nothing like this can be implemented on an Apollo.
623 DEFUN ("dump-emacs-data", Fdump_emacs_data
, Sdump_emacs_data
, 1, 1, 0,
624 "Dump current state of Emacs into data file FILENAME.\n\
625 This function exists on systems that use HAVE_SHM.")
627 Lisp_Object intoname
;
631 extern void malloc_warning ();
633 CHECK_STRING (intoname
, 0);
634 intoname
= Fexpand_file_name (intoname
, Qnil
);
640 /* Tell malloc where start of impure now is */
641 /* Also arrange for warnings when nearly out of space. */
642 #ifndef SYSTEM_MALLOC
643 malloc_init (&my_edata
, malloc_warning
);
645 map_out_data (XSTRING (intoname
)->data
);
652 #else /* not HAVE_SHM */
654 DEFUN ("dump-emacs", Fdump_emacs
, Sdump_emacs
, 2, 2, 0,
655 "Dump current state of Emacs into executable file FILENAME.\n\
656 Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\
657 This is used in the file `loadup.el' when building Emacs.\n\
659 Bind `command-line-processed' to nil before dumping,\n\
660 if you want the dumped Emacs to process its command line\n\
661 and announce itself normally when it is run.")
663 Lisp_Object intoname
, symname
;
667 extern void malloc_warning ();
669 CHECK_STRING (intoname
, 0);
670 intoname
= Fexpand_file_name (intoname
, Qnil
);
673 CHECK_STRING (symname
, 0);
674 if (XSTRING (symname
)->size
)
675 symname
= Fexpand_file_name (symname
, Qnil
);
683 mapout_data (XSTRING (intoname
)->data
);
685 /* Tell malloc where start of impure now is */
686 /* Also arrange for warnings when nearly out of space. */
687 #ifndef SYSTEM_MALLOC
688 malloc_init (&my_edata
, malloc_warning
);
690 unexec (XSTRING (intoname
)->data
,
691 !NILP (symname
) ? XSTRING (symname
)->data
: 0, &my_edata
, 0, 0);
699 #endif /* not HAVE_SHM */
701 #endif /* not CANNOT_DUMP */
710 decode_env_path (evarname
, defalt
)
711 char *evarname
, *defalt
;
713 register char *path
, *p
;
714 extern char *index ();
718 /* It's okay to use getenv here, because this function is only used
719 to initialize variables when Emacs starts up, and isn't called
721 path
= (char *) getenv (evarname
);
727 p
= index (path
, SEPCHAR
);
728 if (!p
) p
= path
+ strlen (path
);
729 lpath
= Fcons (p
- path
? make_string (path
, p
- path
) : Qnil
,
736 return Fnreverse (lpath
);
742 defsubr (&Sdump_emacs_data
);
744 defsubr (&Sdump_emacs
);
747 defsubr (&Skill_emacs
);
749 DEFVAR_LISP ("command-line-args", &Vcommand_line_args
,
750 "Args passed by shell to Emacs, as a list of strings.");
752 DEFVAR_LISP ("system-type", &Vsystem_type
,
753 "Value is symbol indicating type of operating system you are using.");
754 Vsystem_type
= intern (SYSTEM_TYPE
);
756 DEFVAR_BOOL ("noninteractive", &noninteractive1
,
757 "Non-nil means Emacs is running without interactive terminal.");