1 /* Fully extensible Emacs, running on Unix, intended for GNU.
2 Copyright (C) 1985, 1986, 1987 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 */
144 kill_buffer_processes (Qnil
);
146 Fdo_auto_save (Qt
, Qnil
);
148 #ifdef CLASH_DETECTION
150 #endif /* CLASH_DETECTION */
153 kill_vms_processes ();
154 LIB$
STOP (SS$_ABORT
);
156 /* Signal the same code; this time it will really be fatal. */
157 kill (getpid (), fatal_error_code
);
161 /* Code for dealing with Lisp access to the Unix command line */
164 init_cmdargs (argc
, argv
, skip_args
)
171 Vcommand_line_args
= Qnil
;
173 for (i
= argc
- 1; i
>= 0; i
--)
175 if (i
== 0 || i
> skip_args
)
177 = Fcons (build_string (argv
[i
]), Vcommand_line_args
);
182 #ifdef LINK_CRTL_SHARE
183 #ifdef SHAREABLE_LIB_BUG
184 extern noshare
char **environ
;
185 #endif /* SHAREABLE_LIB_BUG */
186 #endif /* LINK_CRTL_SHARE */
190 main (argc
, argv
, envp
)
195 char stack_bottom_variable
;
199 extern char *sys_errlist
[];
200 extern void malloc_warning ();
202 /* Map in shared memory, if we are using that. */
204 if (argc
> 1 && !strcmp (argv
[1], "-nl"))
207 /* The shared memory was just restored, which clobbered this. */
213 /* The shared memory was just restored, which clobbered this. */
218 #ifdef HAVE_X_WINDOWS
219 /* Stupid kludge to catch command-line display spec. We can't
220 handle this argument entirely in window system dependent code
221 because we don't even know which window system dependent code
222 to run until we've recognized this argument. */
226 for (i
= 1; (i
< argc
&& ! display_arg
); i
++)
227 if (!strcmp (argv
[i
], "-d"))
233 /* If -map specified, map the data file in */
234 if (argc
> 2 && ! strcmp (argv
[1], "-map"))
237 mapin_data (argv
[2]);
240 #ifdef LINK_CRTL_SHARE
241 #ifdef SHAREABLE_LIB_BUG
242 /* Bletcherous shared libraries! */
244 stdin
= fdopen (0, "r");
246 stdout
= fdopen (1, "w");
248 stderr
= fdopen (2, "w");
251 #endif /* SHAREABLE_LIB_BUG */
252 #endif /* LINK_CRTL_SHARE */
255 /* Record (approximately) where the stack begins. */
256 stack_bottom
= &stack_bottom_variable
;
258 #ifdef RUN_TIME_REMAP
260 run_time_remap (argv
[0]);
263 #ifdef USG_SHARED_LIBRARIES
270 setpgrp (0, getpid ());
275 /* If USE_DOMAIN_ACLS environment variable exists,
276 use ACLs rather than UNIX modes. */
277 if (egetenv ("USE_DOMAIN_ACLS"))
278 default_acl (USE_DEFACL
);
282 #ifndef SYSTEM_MALLOC
284 malloc_init (0, malloc_warning
);
285 #endif /* not SYSTEM_MALLOC */
288 setpriority (PRIO_PROCESS
, getpid (), HIGHPRI
);
293 /* interrupt_input has trouble if we aren't in a separate process group. */
294 setpgrp (getpid (), getpid ());
297 inhibit_window_system
= 0;
299 /* Handle the -t switch, which specifies filename to use as terminal */
300 if (skip_args
+ 2 < argc
&& !strcmp (argv
[skip_args
+ 1], "-t"))
306 result
= open (argv
[skip_args
], O_RDWR
, 2 );
311 if (errno
>= 0 && errno
< sys_nerr
)
312 errstring
= sys_errlist
[errno
];
314 errstring
= "undocumented error code";
315 fprintf (stderr
, "emacs: %s: %s\n", argv
[skip_args
], errstring
);
321 fprintf (stderr
, "emacs: %s: not a tty\n", argv
[skip_args
]);
324 fprintf (stderr
, "Using %s\n", argv
[skip_args
]);
325 #ifdef HAVE_X_WINDOWS
326 inhibit_window_system
= 1; /* -t => -nw */
330 if (skip_args
+ 1 < argc
331 && (!strcmp (argv
[skip_args
+ 1], "-nw")))
334 inhibit_window_system
= 1;
337 /* Handle the -batch switch, which means don't do interactive display. */
339 if (skip_args
+ 1 < argc
&& !strcmp (argv
[skip_args
+ 1], "-batch"))
351 ! noninteractive
|| initialized
357 /* Don't catch these signals in batch mode if not initialized.
358 On some machines, this sets static data that would make
359 signal fail to work right when the dumped Emacs is run. */
360 signal (SIGHUP
, fatal_error_signal
);
361 signal (SIGQUIT
, fatal_error_signal
);
362 signal (SIGILL
, fatal_error_signal
);
363 signal (SIGTRAP
, fatal_error_signal
);
364 signal (SIGIOT
, fatal_error_signal
);
366 signal (SIGEMT
, fatal_error_signal
);
368 signal (SIGFPE
, fatal_error_signal
);
369 signal (SIGBUS
, fatal_error_signal
);
370 signal (SIGSEGV
, fatal_error_signal
);
371 signal (SIGSYS
, fatal_error_signal
);
372 signal (SIGTERM
, fatal_error_signal
);
374 signal (SIGXCPU
, fatal_error_signal
);
377 signal (SIGXFSZ
, fatal_error_signal
);
381 signal (SIGDANGER
, fatal_error_signal
);
382 signal (20, fatal_error_signal
);
383 signal (21, fatal_error_signal
);
384 signal (22, fatal_error_signal
);
385 signal (23, fatal_error_signal
);
386 signal (24, fatal_error_signal
);
388 signal (SIGAIO
, fatal_error_signal
);
389 signal (SIGPTY
, fatal_error_signal
);
391 signal (SIGIOINT
, fatal_error_signal
);
392 signal (SIGGRANT
, fatal_error_signal
);
393 signal (SIGRETRACT
, fatal_error_signal
);
394 signal (SIGSOUND
, fatal_error_signal
);
395 signal (SIGMSG
, fatal_error_signal
);
399 noninteractive1
= noninteractive
;
401 /* Perform basic initializations (not merely interning symbols) */
408 init_syntax_once (); /* Create standard syntax table. */
409 /* Must be done before init_buffer */
410 init_casetab_once ();
411 init_buffer_once (); /* Create buffer table and some buffers */
412 init_minibuf_once (); /* Create list of minibuffers */
413 /* Must precede init_window_once */
414 init_window_once (); /* Init the window system */
422 init_cmdargs (argc
, argv
, skip_args
); /* Create list Vcommand_line_args */
423 init_buffer (); /* Init default directory of main buffer */
427 init_vms_input ();/* init_display calls get_screen_size, that needs this */
429 init_display (); /* Determine terminal type. init_sys_modes uses results */
431 init_keyboard (); /* This too must precede init_sys_modes */
432 init_callproc (); /* And this too. */
434 init_vmsproc (); /* And this too. */
436 init_sys_modes (); /* Init system terminal modes (RAW or CBREAK, etc.) */
440 #ifdef LISP_FLOAT_TYPE
448 #endif /* subprocesses */
450 /* Intern the names of all standard functions and variables; define standard keys */
454 /* The basic levels of Lisp must come first */
455 /* And data must come first of all
456 for the sake of symbols like error-message */
463 #ifdef LISP_FLOAT_TYPE
471 syms_of_casefiddle ();
475 #ifndef NO_DIR_LIBRARY
477 #endif /* not NO_DIR_LIBRARY */
483 #ifdef CLASH_DETECTION
485 #endif /* CLASH_DETECTION */
495 #endif /* subprocesses */
507 #ifdef HAVE_X_WINDOWS
515 #endif /* HAVE_X_MENU */
516 #endif /* HAVE_X_WINDOWS */
526 keys_of_casefiddle ();
538 /* Handle -l loadup-and-dump, args passed by Makefile. */
539 if (argc
> 2 + skip_args
&& !strcmp (argv
[1 + skip_args
], "-l"))
540 Vtop_level
= Fcons (intern ("load"),
541 Fcons (build_string (argv
[2 + skip_args
]), Qnil
));
543 /* Unless next switch is -nl, load "loadup.el" first thing. */
544 if (!(argc
> 1 + skip_args
&& !strcmp (argv
[1 + skip_args
], "-nl")))
545 Vtop_level
= Fcons (intern ("load"),
546 Fcons (build_string ("loadup.el"), Qnil
));
547 #endif /* CANNOT_DUMP */
552 /* Enter editor command loop. This never returns. */
557 DEFUN ("kill-emacs", Fkill_emacs
, Skill_emacs
, 0, 1, "P",
558 "Exit the Emacs job and kill it. Ask for confirmation, without argument.\n\
559 If ARG is an integer, return ARG as the exit program code.\n\
560 If ARG is a string, stuff it as keyboard input.\n\n\
561 The value of `kill-emacs-hook', if not void,\n\
562 is a list of functions (of no args),\n\
563 all of which are called before Emacs is actually killed.")
567 Lisp_Object hook
, hook1
;
576 if (!NILP (Vrun_hooks
) && !noninteractive
)
577 call1 (Vrun_hooks
, intern ("kill-emacs-hook"));
580 kill_buffer_processes (Qnil
);
581 #endif /* subprocesses */
584 kill_vms_processes ();
587 Fdo_auto_save (Qt
, Qnil
);
589 #ifdef CLASH_DETECTION
591 #endif /* CLASH_DETECTION */
596 #ifdef HAVE_X_WINDOWS
597 if (!noninteractive
&& EQ (Vwindow_system
, intern ("x")))
598 Fx_close_current_connection ();
599 #endif /* HAVE_X_WINDOWS */
603 /* Is it really necessary to do this deassign
604 when we are going to exit anyway? */
608 stuff_buffered_input (arg
);
610 /* There is a tendency for a SIGIO signal to arrive within exit,
611 and cause a SIGHUP because the input descriptor is already closed. */
613 signal (SIGIO
, SIG_IGN
);
615 exit ((XTYPE (arg
) == Lisp_Int
) ? XINT (arg
)
626 /* Nothing like this can be implemented on an Apollo.
631 DEFUN ("dump-emacs-data", Fdump_emacs_data
, Sdump_emacs_data
, 1, 1, 0,
632 "Dump current state of Emacs into data file FILENAME.\n\
633 This function exists on systems that use HAVE_SHM.")
635 Lisp_Object intoname
;
639 extern void malloc_warning ();
641 CHECK_STRING (intoname
, 0);
642 intoname
= Fexpand_file_name (intoname
, Qnil
);
648 /* Tell malloc where start of impure now is */
649 /* Also arrange for warnings when nearly out of space. */
650 #ifndef SYSTEM_MALLOC
651 malloc_init (&my_edata
, malloc_warning
);
653 map_out_data (XSTRING (intoname
)->data
);
660 #else /* not HAVE_SHM */
662 DEFUN ("dump-emacs", Fdump_emacs
, Sdump_emacs
, 2, 2, 0,
663 "Dump current state of Emacs into executable file FILENAME.\n\
664 Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\
665 This is used in the file `loadup.el' when building Emacs.\n\
667 Bind `command-line-processed' to nil before dumping,\n\
668 if you want the dumped Emacs to process its command line\n\
669 and announce itself normally when it is run.")
671 Lisp_Object intoname
, symname
;
675 extern void malloc_warning ();
677 CHECK_STRING (intoname
, 0);
678 intoname
= Fexpand_file_name (intoname
, Qnil
);
681 CHECK_STRING (symname
, 0);
682 if (XSTRING (symname
)->size
)
683 symname
= Fexpand_file_name (symname
, Qnil
);
691 mapout_data (XSTRING (intoname
)->data
);
693 /* Tell malloc where start of impure now is */
694 /* Also arrange for warnings when nearly out of space. */
695 #ifndef SYSTEM_MALLOC
696 malloc_init (&my_edata
, malloc_warning
);
698 unexec (XSTRING (intoname
)->data
,
699 !NILP (symname
) ? XSTRING (symname
)->data
: 0, &my_edata
, 0, 0);
707 #endif /* not HAVE_SHM */
709 #endif /* not CANNOT_DUMP */
718 decode_env_path (evarname
, defalt
)
719 char *evarname
, *defalt
;
721 register char *path
, *p
;
722 extern char *index ();
726 /* It's okay to use getenv here, because this function is only used
727 to initialize variables when Emacs starts up, and isn't called
729 path
= (char *) getenv (evarname
);
735 p
= index (path
, SEPCHAR
);
736 if (!p
) p
= path
+ strlen (path
);
737 lpath
= Fcons (p
- path
? make_string (path
, p
- path
) : Qnil
,
744 return Fnreverse (lpath
);
750 defsubr (&Sdump_emacs_data
);
752 defsubr (&Sdump_emacs
);
755 defsubr (&Skill_emacs
);
757 DEFVAR_LISP ("command-line-args", &Vcommand_line_args
,
758 "Args passed by shell to Emacs, as a list of strings.");
760 DEFVAR_LISP ("system-type", &Vsystem_type
,
761 "Value is symbol indicating type of operating system you are using.");
762 Vsystem_type
= intern (SYSTEM_TYPE
);
764 DEFVAR_BOOL ("noninteractive", &noninteractive1
,
765 "Non-nil means Emacs is running without interactive terminal.");