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