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