src/emacs.c

   1 /* Fully extensible Emacs, running on Unix, intended for GNU.
   2    Copyright (C) 1985, 1986, 1987, 1993, 1994 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   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)
   9 any later version.
  10
  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.
  15
  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.  */
  19
  20
  21 #include <signal.h>
  22 #include <errno.h>
  23
  24 #include <config.h>
  25 #include <stdio.h>
  26
  27 #include <sys/types.h>
  28 #include <sys/file.h>
  29
  30 #ifdef VMS
  31 #include <ssdef.h>
  32 #endif
  33
  34 #ifdef BSD
  35 #include <sys/ioctl.h>
  36 #endif
  37
  38 #ifdef APOLLO
  39 #ifndef APOLLO_SR10
  40 #include <default_acl.h>
  41 #endif
  42 #endif
  43
  44 #include "lisp.h"
  45 #include "commands.h"
  46 #include "intervals.h"
  47
  48 #include "systty.h"
  49 #include "syssignal.h"
  50 #include "process.h"
  51
  52 #ifndef O_RDWR
  53 #define O_RDWR 2
  54 #endif
  55
  56 extern void malloc_warning ();
  57 extern char *index ();
  58 extern char *strerror ();
  59
  60 /* Command line args from shell, as list of strings */
  61 Lisp_Object Vcommand_line_args;
  62
  63 /* The name under which Emacs was invoked, with any leading directory
  64    names discarded.  */
  65 Lisp_Object Vinvocation_name;
  66
  67 /* The directory name from which Emacs was invoked.  */
  68 Lisp_Object Vinvocation_directory;
  69
  70 /* The directory name in which to find subdirs such as lisp and etc.
  71    nil means get them only from PATH_LOADSEARCH.  */
  72 Lisp_Object Vinstallation_directory;
  73
  74 /* Hook run by `kill-emacs' before it does really anything.  */
  75 Lisp_Object Vkill_emacs_hook;
  76
  77 /* Set nonzero after Emacs has started up the first time.
  78   Prevents reinitialization of the Lisp world and keymaps
  79   on subsequent starts.  */
  80 int initialized;
  81
  82 /* Variable whose value is symbol giving operating system type.  */
  83 Lisp_Object Vsystem_type;
  84
  85 /* Variable whose value is string giving configuration built for.  */
  86 Lisp_Object Vsystem_configuration;
  87
  88 /* Variable whose value is string giving configuration options,
  89    for use when reporting bugs.  */
  90 Lisp_Object Vsystem_configuration_options;
  91
  92 /* If non-zero, emacs should not attempt to use an window-specific code,
  93    but instead should use the virtual terminal under which it was started */
  94 int inhibit_window_system;
  95
  96 /* If nonzero, set Emacs to run at this priority.  This is also used
  97    in child_setup and sys_suspend to make sure subshells run at normal
  98    priority; Those functions have their own extern declaration.  */
  99 int emacs_priority;
 100
 101 #ifdef BSD_PGRPS
 102 /* See sysdep.c.  */
 103 extern int inherited_pgroup;
 104 #endif
 105
 106 #ifdef HAVE_X_WINDOWS
 107 /* If non-zero, -d was specified, meaning we're using some window system. */
 108 int display_arg;
 109 #endif
 110
 111 /* An address near the bottom of the stack.
 112    Tells GC how to save a copy of the stack.  */
 113 char *stack_bottom;
 114
 115 #ifdef HAVE_X_WINDOWS
 116 extern Lisp_Object Vwindow_system;
 117 #endif /* HAVE_X_WINDOWS */
 118
 119 #ifdef USG_SHARED_LIBRARIES
 120 /* If nonzero, this is the place to put the end of the writable segment
 121    at startup.  */
 122
 123 unsigned int bss_end = 0;
 124 #endif
 125
 126 /* Nonzero means running Emacs without interactive terminal.  */
 127
 128 int noninteractive;
 129
 130 /* Value of Lisp variable `noninteractive'.
 131    Normally same as C variable `noninteractive'
 132    but nothing terrible happens if user sets this one.  */
 133
 134 int noninteractive1;
 135
 136 /* Save argv and argc.  */
 137 char **initial_argv;
 138 int initial_argc;
 139 \f
 140 /* Signal code for the fatal signal that was received */
 141 int fatal_error_code;
 142
 143 /* Nonzero if handling a fatal error already */
 144 int fatal_error_in_progress;
 145
 146 /* Handle bus errors, illegal instruction, etc. */
 147 SIGTYPE
 148 fatal_error_signal (sig)
 149      int sig;
 150 {
 151   fatal_error_code = sig;
 152   signal (sig, SIG_DFL);
 153
 154   /* If fatal error occurs in code below, avoid infinite recursion.  */
 155   if (! fatal_error_in_progress)
 156     {
 157       fatal_error_in_progress = 1;
 158
 159       shut_down_emacs (sig, 0, Qnil);
 160     }
 161
 162 #ifdef VMS
 163   LIB$STOP (SS$_ABORT);
 164 #else
 165   /* Signal the same code; this time it will really be fatal.
 166      Remember that since we're in a signal handler, the signal we're
 167      going to send is probably blocked, so we have to unblock it if we
 168      want to really receive it.  */
 169 #ifndef MSDOS
 170   sigunblock (sigmask (fatal_error_code));
 171 #endif
 172   kill (getpid (), fatal_error_code);
 173 #endif /* not VMS */
 174 }
 175
 176 #ifdef SIGDANGER
 177
 178 /* Handler for SIGDANGER.  */
 179 SIGTYPE
 180 memory_warning_signal (sig)
 181      int sig;
 182 {
 183   signal (sig, memory_warning_signal);
 184
 185   malloc_warning ("Operating system warns that virtual memory is running low.\n");
 186
 187   /* It might be unsafe to call do_auto_save now.  */
 188   force_auto_save_soon ();
 189 }
 190 #endif
 191 \f
 192 /* Code for dealing with Lisp access to the Unix command line */
 193
 194 static
 195 init_cmdargs (argc, argv, skip_args)
 196      int argc;
 197      char **argv;
 198      int skip_args;
 199 {
 200   register int i;
 201   Lisp_Object name, dir;
 202
 203   initial_argv = argv;
 204   initial_argc = argc;
 205
 206   Vinvocation_name = Ffile_name_nondirectory (build_string (argv[0]));
 207   Vinvocation_directory = Ffile_name_directory (build_string (argv[0]));
 208   /* If we got no directory in argv[0], search PATH to find where
 209      Emacs actually came from.  */
 210   if (NILP (Vinvocation_directory))
 211     {
 212       Lisp_Object found;
 213       int yes = openp (Vexec_path, Vinvocation_name,
 214                        EXEC_SUFFIXES, &found, 1);
 215       if (yes == 1)
 216         Vinvocation_directory = Ffile_name_directory (found);
 217     }
 218
 219   Vinstallation_directory = Qnil;
 220
 221   if (!NILP (Vinvocation_directory))
 222     {
 223       dir = Vinvocation_directory;
 224       name = Fexpand_file_name (Vinvocation_name, dir);
 225       while (1)
 226         {
 227           Lisp_Object tem, lib_src_exists;
 228           Lisp_Object etc_exists, info_exists;
 229
 230           /* See if dir contains subdirs for use by Emacs.
 231              Check for the ones that would exist in a build directory,
 232              not including lisp and info.  */
 233           tem = Fexpand_file_name (build_string ("lib-src"), dir);
 234           lib_src_exists = Ffile_exists_p (tem);
 235           if (!NILP (lib_src_exists))
 236             {
 237               tem = Fexpand_file_name (build_string ("etc"), dir);
 238               etc_exists = Ffile_exists_p (tem);
 239               if (!NILP (etc_exists))
 240                 {
 241                   Vinstallation_directory
 242                     = Ffile_name_as_directory (dir);
 243                   break;
 244                 }
 245             }
 246
 247           /* See if dir's parent contains those subdirs.  */
 248           tem = Fexpand_file_name (build_string ("../lib-src"), dir);
 249           lib_src_exists = Ffile_exists_p (tem);
 250           if (!NILP (lib_src_exists))
 251             {
 252               tem = Fexpand_file_name (build_string ("../etc"), dir);
 253               etc_exists = Ffile_exists_p (tem);
 254               if (!NILP (etc_exists))
 255                 {
 256                   tem = Fexpand_file_name (build_string (".."), dir);
 257                   Vinstallation_directory
 258                     = Ffile_name_as_directory (tem);
 259                   break;
 260                 }
 261             }
 262
 263           /* If the Emacs executable is actually a link,
 264              next try the dir that the link points into.  */
 265           tem = Ffile_symlink_p (name);
 266           if (!NILP (tem))
 267             {
 268               name = Fexpand_file_name (tem, dir);
 269               dir = Ffile_name_directory (name);
 270             }
 271           else
 272             break;
 273         }
 274     }
 275
 276   Vcommand_line_args = Qnil;
 277
 278   for (i = argc - 1; i >= 0; i--)
 279     {
 280       if (i == 0 || i > skip_args)
 281         Vcommand_line_args
 282           = Fcons (build_string (argv[i]), Vcommand_line_args);
 283     }
 284 }
 285
 286 DEFUN ("invocation-name", Finvocation_name, Sinvocation_name, 0, 0, 0,
 287   "Return the program name that was used to run Emacs.\n\
 288 Any directory names are omitted.")
 289   ()
 290 {
 291   return Fcopy_sequence (Vinvocation_name);
 292 }
 293
 294 DEFUN ("invocation-directory", Finvocation_directory, Sinvocation_directory,
 295   0, 0, 0,
 296   "Return the directory name in which the Emacs executable was located")
 297   ()
 298 {
 299   return Fcopy_sequence (Vinvocation_directory);
 300 }
 301
 302 \f
 303 #ifdef VMS
 304 #ifdef LINK_CRTL_SHARE
 305 #ifdef SHAREABLE_LIB_BUG
 306 extern noshare char **environ;
 307 #endif /* SHAREABLE_LIB_BUG */
 308 #endif /* LINK_CRTL_SHARE */
 309 #endif /* VMS */
 310
 311 #ifndef ORDINARY_LINK
 312 /* We don't include crtbegin.o and crtend.o in the link,
 313    so these functions and variables might be missed.
 314    Provide dummy definitions to avoid error.
 315    (We don't have any real constructors or destructors.)  */
 316 #ifdef __GNUC__
 317 #ifndef GCC_CTORS_IN_LIBC
 318 __do_global_ctors ()
 319 {}
 320 __do_global_ctors_aux ()
 321 {}
 322 __do_global_dtors ()
 323 {}
 324 /* Linux has a bug in its library; avoid an error.  */
 325 #ifndef LINUX
 326 char * __CTOR_LIST__[2] = { (char *) (-1), 0 };
 327 #endif
 328 char * __DTOR_LIST__[2] = { (char *) (-1), 0 };
 329 #endif /* GCC_CTORS_IN_LIBC */
 330 __main ()
 331 {}
 332 #endif /* __GNUC__ */
 333 #endif /* ORDINARY_LINK */
 334
 335 /* ARGSUSED */
 336 main (argc, argv, envp)
 337      int argc;
 338      char **argv;
 339      char **envp;
 340 {
 341   char stack_bottom_variable;
 342   int skip_args = 0;
 343   extern int errno;
 344   extern sys_nerr;
 345
 346 /* Map in shared memory, if we are using that.  */
 347 #ifdef HAVE_SHM
 348   if (argc > 1 && !strcmp (argv[1], "-nl"))
 349     {
 350       map_in_data (0);
 351       /* The shared memory was just restored, which clobbered this.  */
 352       skip_args = 1;
 353     }
 354   else
 355     {
 356       map_in_data (1);
 357       /* The shared memory was just restored, which clobbered this.  */
 358       skip_args = 0;
 359     }
 360 #endif
 361
 362 #ifdef NeXT
 363   extern int malloc_cookie;
 364
 365   /* This helps out unexnext.c.  */
 366   if (initialized)
 367     if (malloc_jumpstart (malloc_cookie) != 0)
 368       printf ("malloc jumpstart failed!\n");
 369 #endif /* NeXT */
 370
 371 #ifdef HAVE_X_WINDOWS
 372   /* Stupid kludge to catch command-line display spec.  We can't
 373      handle this argument entirely in window system dependent code
 374      because we don't even know which window system dependent code
 375      to run until we've recognized this argument.  */
 376   {
 377     int i;
 378
 379     for (i = 1; (i < argc && ! display_arg); i++)
 380       if (!strcmp (argv[i], "-d") || !strcmp (argv[i], "-display"))
 381         display_arg = 1;
 382   }
 383 #endif
 384
 385 #ifdef VMS
 386   /* If -map specified, map the data file in */
 387   if (argc > 2 && ! strcmp (argv[1], "-map"))
 388     {
 389       skip_args = 2;
 390       mapin_data (argv[2]);
 391     }
 392
 393 #ifdef LINK_CRTL_SHARE
 394 #ifdef SHAREABLE_LIB_BUG
 395   /* Bletcherous shared libraries! */
 396   if (!stdin)
 397     stdin = fdopen (0, "r");
 398   if (!stdout)
 399     stdout = fdopen (1, "w");
 400   if (!stderr)
 401     stderr = fdopen (2, "w");
 402   if (!environ)
 403     environ = envp;
 404 #endif /* SHAREABLE_LIB_BUG */
 405 #endif /* LINK_CRTL_SHARE */
 406 #endif /* VMS */
 407
 408   /* Record (approximately) where the stack begins.  */
 409   stack_bottom = &stack_bottom_variable;
 410
 411 #ifdef RUN_TIME_REMAP
 412   if (initialized)
 413     run_time_remap (argv[0]);
 414 #endif
 415
 416 #ifdef USG_SHARED_LIBRARIES
 417   if (bss_end)
 418     brk (bss_end);
 419 #endif
 420
 421   clearerr (stdin);
 422
 423 #ifdef APOLLO
 424 #ifndef APOLLO_SR10
 425   /* If USE_DOMAIN_ACLS environment variable exists,
 426      use ACLs rather than UNIX modes. */
 427   if (egetenv ("USE_DOMAIN_ACLS"))
 428     default_acl (USE_DEFACL);
 429 #endif
 430 #endif /* APOLLO */
 431
 432 #ifndef SYSTEM_MALLOC
 433   if (! initialized)
 434     {
 435       /* Arrange to get warning messages as memory fills up.  */
 436       memory_warnings (0, malloc_warning);
 437
 438       /* Arrange to disable interrupt input while malloc and friends are
 439          running.  */
 440       uninterrupt_malloc ();
 441     }
 442 #endif  /* not SYSTEM_MALLOC */
 443
 444 #ifdef MSDOS
 445   /* We do all file input/output as binary files.  When we need to translate
 446      newlines, we do that manually.  */
 447   _fmode = O_BINARY;
 448   (stdin)->_flag &= ~_IOTEXT;
 449   (stdout)->_flag &= ~_IOTEXT;
 450   (stderr)->_flag &= ~_IOTEXT;
 451 #endif /* MSDOS */
 452
 453 #ifdef SET_EMACS_PRIORITY
 454   if (emacs_priority)
 455     nice (emacs_priority);
 456   setuid (getuid ());
 457 #endif /* SET_EMACS_PRIORITY */
 458
 459 #ifdef EXTRA_INITIALIZE
 460   EXTRA_INITIALIZE;
 461 #endif
 462
 463   inhibit_window_system = 0;
 464
 465   /* Handle the -t switch, which specifies filename to use as terminal */
 466   if (skip_args + 2 < argc && !strcmp (argv[skip_args + 1], "-t"))
 467     {
 468       int result;
 469       skip_args += 2;
 470       close (0);
 471       close (1);
 472       result = open (argv[skip_args], O_RDWR, 2 );
 473       if (result < 0)
 474         {
 475           char *errstring = strerror (errno);
 476           fprintf (stderr, "emacs: %s: %s\n", argv[skip_args], errstring);
 477           exit (1);
 478         }
 479       dup (0);
 480       if (! isatty (0))
 481         {
 482           fprintf (stderr, "emacs: %s: not a tty\n", argv[skip_args]);
 483           exit (1);
 484         }
 485       fprintf (stderr, "Using %s\n", argv[skip_args]);
 486 #ifdef HAVE_X_WINDOWS
 487       inhibit_window_system = 1;        /* -t => -nw */
 488 #endif
 489     }
 490
 491   if (skip_args + 1 < argc
 492       && (!strcmp (argv[skip_args + 1], "-nw")))
 493     {
 494       skip_args += 1;
 495       inhibit_window_system = 1;
 496     }
 497
 498 /* Handle the -batch switch, which means don't do interactive display.  */
 499   noninteractive = 0;
 500   if (skip_args + 1 < argc && !strcmp (argv[skip_args + 1], "-batch"))
 501     {
 502       skip_args += 1;
 503       noninteractive = 1;
 504     }
 505
 506   if (! noninteractive)
 507     {
 508 #ifdef BSD_PGRPS
 509       if (initialized)
 510         {
 511           inherited_pgroup = EMACS_GETPGRP (0);
 512           setpgrp (0, getpid ());
 513         }
 514 #else
 515 #if defined (USG5) && defined (INTERRUPT_INPUT)
 516       setpgrp ();
 517 #endif
 518 #endif
 519     }
 520
 521 #ifdef POSIX_SIGNALS
 522   init_signals ();
 523 #endif
 524
 525   if (
 526 #ifndef CANNOT_DUMP
 527       ! noninteractive || initialized
 528 #else
 529       1
 530 #endif
 531       )
 532     {
 533       /* Don't catch these signals in batch mode if not initialized.
 534          On some machines, this sets static data that would make
 535          signal fail to work right when the dumped Emacs is run.  */
 536       signal (SIGHUP, fatal_error_signal);
 537       signal (SIGQUIT, fatal_error_signal);
 538       signal (SIGILL, fatal_error_signal);
 539       signal (SIGTRAP, fatal_error_signal);
 540 #ifdef SIGIOT
 541       /* This is missing on some systems - OS/2, for example.  */
 542       signal (SIGIOT, fatal_error_signal);
 543 #endif
 544 #ifdef SIGEMT
 545       signal (SIGEMT, fatal_error_signal);
 546 #endif
 547       signal (SIGFPE, fatal_error_signal);
 548 #ifdef SIGBUS
 549       signal (SIGBUS, fatal_error_signal);
 550 #endif
 551       signal (SIGSEGV, fatal_error_signal);
 552 #ifdef SIGSYS
 553       signal (SIGSYS, fatal_error_signal);
 554 #endif
 555       signal (SIGTERM, fatal_error_signal);
 556 #ifdef SIGXCPU
 557       signal (SIGXCPU, fatal_error_signal);
 558 #endif
 559 #ifdef SIGXFSZ
 560       signal (SIGXFSZ, fatal_error_signal);
 561 #endif /* SIGXFSZ */
 562
 563 #ifdef SIGDANGER
 564       /* This just means available memory is getting low.  */
 565       signal (SIGDANGER, memory_warning_signal);
 566 #endif
 567
 568 #ifdef AIX
 569 /* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU.  */
 570       signal (SIGXCPU, fatal_error_signal);
 571 #ifndef _I386
 572       signal (SIGIOINT, fatal_error_signal);
 573 #endif
 574       signal (SIGGRANT, fatal_error_signal);
 575       signal (SIGRETRACT, fatal_error_signal);
 576       signal (SIGSOUND, fatal_error_signal);
 577       signal (SIGMSG, fatal_error_signal);
 578 #endif /* AIX */
 579     }
 580
 581   noninteractive1 = noninteractive;
 582
 583 /* Perform basic initializations (not merely interning symbols) */
 584
 585   if (!initialized)
 586     {
 587       init_alloc_once ();
 588       init_obarray ();
 589       init_eval_once ();
 590       init_syntax_once ();      /* Create standard syntax table.  */
 591                       /* Must be done before init_buffer */
 592       init_casetab_once ();
 593       init_buffer_once ();      /* Create buffer table and some buffers */
 594       init_minibuf_once ();     /* Create list of minibuffers */
 595                               /* Must precede init_window_once */
 596       init_window_once ();      /* Init the window system */
 597     }
 598
 599   init_alloc ();
 600   init_eval ();
 601   init_data ();
 602
 603 #ifdef MSDOS
 604   /* Call early 'cause init_environment needs it.  */
 605   init_dosfns ();
 606   /* Set defaults for several environment variables.  */
 607   if (initialized) init_environment (argc, argv, skip_args);
 608 #endif
 609
 610   /* egetenv is a pretty low-level facility, which may get called in
 611      many circumstances; it seems flimsy to put off initializing it
 612      until calling init_callproc.  */
 613   set_process_environment ();
 614   /* AIX crashes are reported in system versions 3.2.3 and 3.2.4
 615      if this is not done.  Do it after set_process_environment so that we
 616      don't pollute Vprocess_environment.  */
 617 #ifdef AIX
 618   putenv ("LANG=C");
 619 #endif
 620
 621   init_buffer ();       /* Init default directory of main buffer */
 622
 623   init_callproc_1 ();   /* Must precede init_cmdargs and init_sys_modes.  */
 624   init_cmdargs (argc, argv, skip_args); /* Must precede init_lread.  */
 625   init_callproc ();     /* Must follow init_cmdargs but not init_sys_modes.  */
 626   init_lread ();
 627
 628   if (!noninteractive)
 629     {
 630 #ifdef VMS
 631       init_vms_input ();/* init_display calls get_frame_size, that needs this */
 632 #endif /* VMS */
 633       init_display ();  /* Determine terminal type.  init_sys_modes uses results */
 634     }
 635   init_keyboard ();     /* This too must precede init_sys_modes */
 636 #ifdef VMS
 637   init_vmsproc ();      /* And this too. */
 638 #endif /* VMS */
 639   init_sys_modes ();    /* Init system terminal modes (RAW or CBREAK, etc.) */
 640   init_xdisp ();
 641   init_macros ();
 642   init_editfns ();
 643 #ifdef LISP_FLOAT_TYPE
 644   init_floatfns ();
 645 #endif
 646 #ifdef VMS
 647   init_vmsfns ();
 648 #endif /* VMS */
 649   init_process ();
 650 #ifdef CLASH_DETECTION
 651   init_filelock ();
 652 #endif /* CLASH_DETECTION */
 653
 654 /* Intern the names of all standard functions and variables; define standard keys */
 655
 656   if (!initialized)
 657     {
 658       /* The basic levels of Lisp must come first */
 659       /* And data must come first of all
 660          for the sake of symbols like error-message */
 661       syms_of_data ();
 662       syms_of_alloc ();
 663       syms_of_lread ();
 664       syms_of_print ();
 665       syms_of_eval ();
 666       syms_of_fns ();
 667       syms_of_floatfns ();
 668
 669       syms_of_abbrev ();
 670       syms_of_buffer ();
 671       syms_of_bytecode ();
 672       syms_of_callint ();
 673       syms_of_casefiddle ();
 674       syms_of_casetab ();
 675       syms_of_callproc ();
 676       syms_of_cmds ();
 677 #ifndef NO_DIR_LIBRARY
 678       syms_of_dired ();
 679 #endif /* not NO_DIR_LIBRARY */
 680       syms_of_display ();
 681       syms_of_doc ();
 682       syms_of_editfns ();
 683       syms_of_emacs ();
 684       syms_of_fileio ();
 685 #ifdef CLASH_DETECTION
 686       syms_of_filelock ();
 687 #endif /* CLASH_DETECTION */
 688       syms_of_indent ();
 689       syms_of_keyboard ();
 690       syms_of_keymap ();
 691       syms_of_macros ();
 692       syms_of_marker ();
 693       syms_of_minibuf ();
 694       syms_of_mocklisp ();
 695       syms_of_process ();
 696       syms_of_search ();
 697       syms_of_frame ();
 698       syms_of_syntax ();
 699       syms_of_term ();
 700       syms_of_undo ();
 701
 702       /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
 703       syms_of_textprop ();
 704 #ifdef VMS
 705       syms_of_vmsproc ();
 706 #endif /* VMS */
 707       syms_of_window ();
 708       syms_of_xdisp ();
 709 #ifdef HAVE_X_WINDOWS
 710       syms_of_xterm ();
 711       syms_of_xfns ();
 712       syms_of_xfaces ();
 713 #ifdef HAVE_X11
 714       syms_of_xselect ();
 715 #endif
 716 #ifdef HAVE_X_MENU
 717       syms_of_xmenu ();
 718 #endif /* HAVE_X_MENU */
 719 #endif /* HAVE_X_WINDOWS */
 720
 721 #ifdef SYMS_SYSTEM
 722       SYMS_SYSTEM;
 723 #endif
 724
 725 #ifdef SYMS_MACHINE
 726       SYMS_MACHINE;
 727 #endif
 728
 729       keys_of_casefiddle ();
 730       keys_of_cmds ();
 731       keys_of_buffer ();
 732       keys_of_keyboard ();
 733       keys_of_keymap ();
 734       keys_of_macros ();
 735       keys_of_minibuf ();
 736       keys_of_window ();
 737       keys_of_frame ();
 738     }
 739
 740   if (!initialized)
 741     {
 742       /* Handle -l loadup-and-dump, args passed by Makefile. */
 743       if (argc > 2 + skip_args && !strcmp (argv[1 + skip_args], "-l"))
 744         Vtop_level = Fcons (intern ("load"),
 745                             Fcons (build_string (argv[2 + skip_args]), Qnil));
 746 #ifdef CANNOT_DUMP
 747       /* Unless next switch is -nl, load "loadup.el" first thing.  */
 748       if (!(argc > 1 + skip_args && !strcmp (argv[1 + skip_args], "-nl")))
 749         Vtop_level = Fcons (intern ("load"),
 750                             Fcons (build_string ("loadup.el"), Qnil));
 751 #endif /* CANNOT_DUMP */
 752     }
 753
 754   initialized = 1;
 755
 756 #if defined (sun) || defined (LOCALTIME_CACHE)
 757   /* sun's localtime has a bug.  it caches the value of the time
 758      zone rather than looking it up every time.  Since localtime() is
 759      called to bolt the undumping time into the undumped emacs, this
 760      results in localtime ignoring the TZ environment variable.
 761      This flushes the new TZ value into localtime. */
 762   tzset ();
 763 #endif /* defined (sun) || defined (LOCALTIME_CACHE) */
 764
 765   /* Enter editor command loop.  This never returns.  */
 766   Frecursive_edit ();
 767   /* NOTREACHED */
 768 }
 769 \f
 770 DEFUN ("kill-emacs", Fkill_emacs, Skill_emacs, 0, 1, "P",
 771   "Exit the Emacs job and kill it.\n\
 772 If ARG is an integer, return ARG as the exit program code.\n\
 773 If ARG is a  string, stuff it as keyboard input.\n\n\
 774 The value of `kill-emacs-hook', if not void,\n\
 775 is a list of functions (of no args),\n\
 776 all of which are called before Emacs is actually killed.")
 777   (arg)
 778      Lisp_Object arg;
 779 {
 780   Lisp_Object hook, hook1;
 781   int i;
 782   struct gcpro gcpro1;
 783
 784   GCPRO1 (arg);
 785
 786   if (feof (stdin))
 787     arg = Qt;
 788
 789   if (!NILP (Vrun_hooks) && !noninteractive)
 790     call1 (Vrun_hooks, intern ("kill-emacs-hook"));
 791
 792   UNGCPRO;
 793
 794 /* Is it really necessary to do this deassign
 795    when we are going to exit anyway?  */
 796 /* #ifdef VMS
 797   stop_vms_input ();
 798  #endif  */
 799
 800   shut_down_emacs (0, 0, STRINGP (arg) ? arg : Qnil);
 801
 802   exit ((XTYPE (arg) == Lisp_Int) ? XINT (arg)
 803 #ifdef VMS
 804         : 1
 805 #else
 806         : 0
 807 #endif
 808         );
 809   /* NOTREACHED */
 810 }
 811
 812
 813 /* Perform an orderly shutdown of Emacs.  Autosave any modified
 814    buffers, kill any child processes, clean up the terminal modes (if
 815    we're in the foreground), and other stuff like that.  Don't perform
 816    any redisplay; this may be called when Emacs is shutting down in
 817    the background, or after its X connection has died.
 818
 819    If SIG is a signal number, print a message for it.
 820
 821    This is called by fatal signal handlers, X protocol error handlers,
 822    and Fkill_emacs.  */
 823
 824 void
 825 shut_down_emacs (sig, no_x, stuff)
 826      int sig, no_x;
 827      Lisp_Object stuff;
 828 {
 829   /* Prevent running of hooks from now on.  */
 830   Vrun_hooks = Qnil;
 831
 832   /* If we are controlling the terminal, reset terminal modes */
 833 #ifdef EMACS_HAVE_TTY_PGRP
 834   {
 835     int pgrp = EMACS_GETPGRP (0);
 836
 837     int tpgrp;
 838     if (EMACS_GET_TTY_PGRP (0, &tpgrp) != -1
 839         && tpgrp == pgrp)
 840       {
 841         fflush (stdout);
 842         reset_sys_modes ();
 843         if (sig && sig != SIGTERM)
 844           fprintf (stderr, "Fatal error (%d).", sig);
 845       }
 846   }
 847 #else
 848   fflush (stdout);
 849   reset_sys_modes ();
 850 #endif
 851
 852   stuff_buffered_input (stuff);
 853
 854   kill_buffer_processes (Qnil);
 855   Fdo_auto_save (Qt, Qnil);
 856
 857 #ifdef CLASH_DETECTION
 858   unlock_all_files ();
 859 #endif
 860
 861 #ifdef VMS
 862   kill_vms_processes ();
 863 #endif
 864
 865 #if 0 /* This triggers a bug in XCloseDisplay and is not needed.  */
 866 #ifdef HAVE_X_WINDOWS
 867   /* It's not safe to call intern here.  Maybe we are crashing.  */
 868   if (!noninteractive && SYMBOLP (Vwindow_system)
 869       && XSYMBOL (Vwindow_system)->name->size == 1
 870       && XSYMBOL (Vwindow_system)->name->data[0] == 'x'
 871       && ! no_x)
 872     Fx_close_current_connection ();
 873 #endif /* HAVE_X_WINDOWS */
 874 #endif
 875
 876 #ifdef SIGIO
 877   /* There is a tendency for a SIGIO signal to arrive within exit,
 878      and cause a SIGHUP because the input descriptor is already closed.  */
 879   unrequest_sigio ();
 880   signal (SIGIO, SIG_IGN);
 881 #endif
 882 }
 883
 884
 885 \f
 886 #ifndef CANNOT_DUMP
 887 /* Nothing like this can be implemented on an Apollo.
 888    What a loss!  */
 889
 890 #ifdef HAVE_SHM
 891
 892 DEFUN ("dump-emacs-data", Fdump_emacs_data, Sdump_emacs_data, 1, 1, 0,
 893   "Dump current state of Emacs into data file FILENAME.\n\
 894 This function exists on systems that use HAVE_SHM.")
 895   (intoname)
 896      Lisp_Object intoname;
 897 {
 898   extern int my_edata;
 899   Lisp_Object tem;
 900
 901   CHECK_STRING (intoname, 0);
 902   intoname = Fexpand_file_name (intoname, Qnil);
 903
 904   tem = Vpurify_flag;
 905   Vpurify_flag = Qnil;
 906
 907   fflush (stdout);
 908   /* Tell malloc where start of impure now is */
 909   /* Also arrange for warnings when nearly out of space.  */
 910 #ifndef SYSTEM_MALLOC
 911   memory_warnings (&my_edata, malloc_warning);
 912 #endif
 913   map_out_data (XSTRING (intoname)->data);
 914
 915   Vpurify_flag = tem;
 916
 917   return Qnil;
 918 }
 919
 920 #else /* not HAVE_SHM */
 921
 922 DEFUN ("dump-emacs", Fdump_emacs, Sdump_emacs, 2, 2, 0,
 923   "Dump current state of Emacs into executable file FILENAME.\n\
 924 Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\
 925 This is used in the file `loadup.el' when building Emacs.\n\
 926 \n\
 927 Bind `command-line-processed' to nil before dumping,\n\
 928 if you want the dumped Emacs to process its command line\n\
 929 and announce itself normally when it is run.")
 930   (intoname, symname)
 931      Lisp_Object intoname, symname;
 932 {
 933   extern int my_edata;
 934   Lisp_Object tem;
 935
 936   CHECK_STRING (intoname, 0);
 937   intoname = Fexpand_file_name (intoname, Qnil);
 938   if (!NILP (symname))
 939     {
 940       CHECK_STRING (symname, 0);
 941       if (XSTRING (symname)->size)
 942         symname = Fexpand_file_name (symname, Qnil);
 943     }
 944
 945   tem = Vpurify_flag;
 946   Vpurify_flag = Qnil;
 947
 948   fflush (stdout);
 949 #ifdef VMS
 950   mapout_data (XSTRING (intoname)->data);
 951 #else
 952   /* Tell malloc where start of impure now is */
 953   /* Also arrange for warnings when nearly out of space.  */
 954 #ifndef SYSTEM_MALLOC
 955   memory_warnings (&my_edata, malloc_warning);
 956 #endif
 957   unexec (XSTRING (intoname)->data,
 958           !NILP (symname) ? XSTRING (symname)->data : 0, &my_edata, 0, 0);
 959 #endif /* not VMS */
 960
 961   Vpurify_flag = tem;
 962
 963   return Qnil;
 964 }
 965
 966 #endif /* not HAVE_SHM */
 967
 968 #endif /* not CANNOT_DUMP */
 969 \f
 970 #ifndef SEPCHAR
 971 #define SEPCHAR ':'
 972 #endif
 973
 974 Lisp_Object
 975 decode_env_path (evarname, defalt)
 976      char *evarname, *defalt;
 977 {
 978   register char *path, *p;
 979
 980   Lisp_Object lpath;
 981
 982   /* It's okay to use getenv here, because this function is only used
 983      to initialize variables when Emacs starts up, and isn't called
 984      after that.  */
 985   if (evarname != 0)
 986     path = (char *) getenv (evarname);
 987   else
 988     path = 0;
 989   if (!path)
 990     path = defalt;
 991   lpath = Qnil;
 992   while (1)
 993     {
 994       p = index (path, SEPCHAR);
 995       if (!p) p = path + strlen (path);
 996       lpath = Fcons (p - path ? make_string (path, p - path) : Qnil,
 997                      lpath);
 998       if (*p)
 999         path = p + 1;
1000       else
1001         break;
1002     }
1003   return Fnreverse (lpath);
1004 }
1005
1006 syms_of_emacs ()
1007 {
1008 #ifndef CANNOT_DUMP
1009 #ifdef HAVE_SHM
1010   defsubr (&Sdump_emacs_data);
1011 #else
1012   defsubr (&Sdump_emacs);
1013 #endif
1014 #endif
1015
1016   defsubr (&Skill_emacs);
1017
1018   defsubr (&Sinvocation_name);
1019   defsubr (&Sinvocation_directory);
1020
1021   DEFVAR_LISP ("command-line-args", &Vcommand_line_args,
1022     "Args passed by shell to Emacs, as a list of strings.");
1023
1024   DEFVAR_LISP ("system-type", &Vsystem_type,
1025     "Value is symbol indicating type of operating system you are using.");
1026   Vsystem_type = intern (SYSTEM_TYPE);
1027
1028   DEFVAR_LISP ("system-configuration", &Vsystem_configuration,
1029     "Value is string indicating configuration Emacs was built for.");
1030   Vsystem_configuration = build_string (EMACS_CONFIGURATION);
1031
1032   DEFVAR_LISP ("system-configuration-options", &Vsystem_configuration_options,
1033     "String containing the configuration options Emacs was built with.");
1034   Vsystem_configuration_options = build_string (EMACS_CONFIG_OPTIONS);
1035
1036   DEFVAR_BOOL ("noninteractive", &noninteractive1,
1037     "Non-nil means Emacs is running without interactive terminal.");
1038
1039   DEFVAR_LISP ("kill-emacs-hook", &Vkill_emacs_hook,
1040     "Hook to be run whenever kill-emacs is called.\n\
1041 Since kill-emacs may be invoked when the terminal is disconnected (or\n\
1042 in other similar situations), functions placed on this hook should not\n\
1043 expect to be able to interact with the user.");
1044   Vkill_emacs_hook = Qnil;
1045
1046   DEFVAR_INT ("emacs-priority", &emacs_priority,
1047     "Priority for Emacs to run at.\n\
1048 This value is effective only if set before Emacs is dumped,\n\
1049 and only if the Emacs executable is installed with setuid to permit\n\
1050 it to change priority.  (Emacs sets its uid back to the real uid.)\n\
1051 Currently, you need to define SET_EMACS_PRIORITY in `config.h'\n\
1052 before you compile Emacs, to enable the code for this feature.");
1053   emacs_priority = 0;
1054
1055   DEFVAR_LISP ("invocation-name", &Vinvocation_name,
1056     "The program name that was used to run Emacs.\n\
1057 Any directory names are omitted.");
1058
1059   DEFVAR_LISP ("invocation-directory", &Vinvocation_directory,
1060     "The directory in which the Emacs executable was found, to run it.\n\
1061 The value is nil if that directory's name is not known.");
1062
1063   DEFVAR_LISP ("installation-directory", &Vinstallation_directory,
1064     "A directory within which to look for the `lib-src' and `etc' directories.\n\
1065 This is non-nil when we can't find those directories in their standard\n\
1066 installed locations, but we can find them\n\
1067 near where the Emacs executable was found.");
1068   Vinstallation_directory = Qnil;
1069 }