home *** CD-ROM | disk | FTP | other *** search
- /* Fully extensible Emacs, running on Unix, intended for GNU.
- Copyright (C) 1985, 1986, 1987, 1993 Free Software Foundation, Inc.
-
- This file is part of GNU Emacs.
-
- GNU Emacs is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU Emacs is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Emacs; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- #include <signal.h>
- #include <errno.h>
-
- #include "config.h"
- #include <stdio.h>
-
- #include <sys/types.h>
- #include <sys/file.h>
-
- #ifdef VMS
- #include <ssdef.h>
- #endif
-
- #ifdef BSD
- #include <sys/ioctl.h>
- #endif
-
- #ifdef APOLLO
- #ifndef APOLLO_SR10
- #include <default_acl.h>
- #endif
- #endif
-
- #include "lisp.h"
- #include "commands.h"
- #include "intervals.h"
-
- #include "systty.h"
- #include "syssignal.h"
-
- #ifndef O_RDWR
- #define O_RDWR 2
- #endif
-
- /* Command line args from shell, as list of strings */
- Lisp_Object Vcommand_line_args;
-
- /* The name under which Emacs was invoked, with any leading directory
- names discarded. */
- Lisp_Object Vinvocation_name;
-
- /* Hook run by `kill-emacs' before it does really anything. */
- Lisp_Object Vkill_emacs_hook;
-
- /* Set nonzero after Emacs has started up the first time.
- Prevents reinitialization of the Lisp world and keymaps
- on subsequent starts. */
- int initialized;
-
- /* Variable whose value is symbol giving operating system type */
- Lisp_Object Vsystem_type;
-
- /* If non-zero, emacs should not attempt to use an window-specific code,
- but instead should use the virtual terminal under which it was started */
- int inhibit_window_system;
-
- /* If nonzero, set Emacs to run at this priority. This is also used
- in child_setup and sys_suspend to make sure subshells run at normal
- priority; Those functions have their own extern declaration. */
- int emacs_priority;
-
- #ifdef BSD
- /* See sysdep.c. */
- extern int inherited_pgroup;
- #endif
-
- #ifdef HAVE_X_WINDOWS
- /* If non-zero, -d was specified, meaning we're using some window system. */
- int display_arg;
- #endif
-
- /* An address near the bottom of the stack.
- Tells GC how to save a copy of the stack. */
- char *stack_bottom;
-
- #ifdef HAVE_X_WINDOWS
- extern Lisp_Object Vwindow_system;
- #endif /* HAVE_X_WINDOWS */
-
- #ifdef USG_SHARED_LIBRARIES
- /* If nonzero, this is the place to put the end of the writable segment
- at startup. */
-
- unsigned int bss_end = 0;
- #endif
-
- /* Nonzero means running Emacs without interactive terminal. */
-
- int noninteractive;
-
- /* Value of Lisp variable `noninteractive'.
- Normally same as C variable `noninteractive'
- but nothing terrible happens if user sets this one. */
-
- int noninteractive1;
-
- /* Signal code for the fatal signal that was received */
- int fatal_error_code;
-
- /* Nonzero if handling a fatal error already */
- int fatal_error_in_progress;
-
- /* Handle bus errors, illegal instruction, etc. */
- SIGTYPE
- fatal_error_signal (sig)
- int sig;
- {
- fatal_error_code = sig;
- signal (sig, SIG_DFL);
-
- /* If fatal error occurs in code below, avoid infinite recursion. */
- if (! fatal_error_in_progress)
- {
- fatal_error_in_progress = 1;
-
- shut_down_emacs (sig, 0, Qnil);
- }
-
- #ifdef VMS
- LIB$STOP (SS$_ABORT);
- #else
- /* Signal the same code; this time it will really be fatal.
- Remember that since we're in a signal handler, the signal we're
- going to send is probably blocked, so we have to unblock it if we
- want to really receive it. */
- sigunblock (sigmask (fatal_error_code));
- kill (getpid (), fatal_error_code);
- #endif /* not VMS */
- }
-
- /* Code for dealing with Lisp access to the Unix command line */
-
- static
- init_cmdargs (argc, argv, skip_args)
- int argc;
- char **argv;
- int skip_args;
- {
- register int i;
-
- Vinvocation_name = Ffile_name_nondirectory (build_string (argv[0]));
-
- Vcommand_line_args = Qnil;
-
- for (i = argc - 1; i >= 0; i--)
- {
- if (i == 0 || i > skip_args)
- Vcommand_line_args
- = Fcons (build_string (argv[i]), Vcommand_line_args);
- }
- }
-
- DEFUN ("invocation-name", Finvocation_name, Sinvocation_name, 0, 0, 0,
- "Return the program name that was used to run Emacs.\n\
- Any directory names are omitted.")
- ()
- {
- return Fcopy_sequence (Vinvocation_name);
- }
-
-
- #ifdef VMS
- #ifdef LINK_CRTL_SHARE
- #ifdef SHAREABLE_LIB_BUG
- extern noshare char **environ;
- #endif /* SHAREABLE_LIB_BUG */
- #endif /* LINK_CRTL_SHARE */
- #endif /* VMS */
-
- #ifndef ORDINARY_LINK
- /* We don't include crtbegin.o and crtend.o in the link,
- so these functions and variables might be missed.
- Provide dummy definitions to avoid error.
- (We don't have any real constructors or destructors.) */
- #ifdef __GNUC__
- __do_global_ctors ()
- {}
- __do_global_ctors_aux ()
- {}
- __do_global_dtors ()
- {}
- char * __CTOR_LIST__[2] = { (char *) (-1), 0 };
- char * __DTOR_LIST__[2] = { (char *) (-1), 0 };
- __main ()
- {}
- #endif /* __GNUC__ */
- #endif /* ORDINARY_LINK */
-
- /* ARGSUSED */
- main (argc, argv, envp)
- int argc;
- char **argv;
- char **envp;
- {
- char stack_bottom_variable;
- int skip_args = 0;
- extern int errno;
- extern sys_nerr;
- extern char *sys_errlist[];
- extern void malloc_warning ();
-
- /* Map in shared memory, if we are using that. */
- #ifdef HAVE_SHM
- if (argc > 1 && !strcmp (argv[1], "-nl"))
- {
- map_in_data (0);
- /* The shared memory was just restored, which clobbered this. */
- skip_args = 1;
- }
- else
- {
- map_in_data (1);
- /* The shared memory was just restored, which clobbered this. */
- skip_args = 0;
- }
- #endif
-
- #ifdef NeXT
- extern int malloc_cookie;
-
- /* This helps out unexnext.c. */
- if (initialized)
- if (malloc_jumpstart (malloc_cookie) != 0)
- printf ("malloc jumpstart failed!\n");
- #endif /* NeXT */
-
- #ifdef HAVE_X_WINDOWS
- /* Stupid kludge to catch command-line display spec. We can't
- handle this argument entirely in window system dependent code
- because we don't even know which window system dependent code
- to run until we've recognized this argument. */
- {
- int i;
-
- for (i = 1; (i < argc && ! display_arg); i++)
- if (!strcmp (argv[i], "-d") || !strcmp (argv[i], "-display"))
- display_arg = 1;
- }
- #endif
-
- #ifdef VMS
- /* If -map specified, map the data file in */
- if (argc > 2 && ! strcmp (argv[1], "-map"))
- {
- skip_args = 2;
- mapin_data (argv[2]);
- }
-
- #ifdef LINK_CRTL_SHARE
- #ifdef SHAREABLE_LIB_BUG
- /* Bletcherous shared libraries! */
- if (!stdin)
- stdin = fdopen (0, "r");
- if (!stdout)
- stdout = fdopen (1, "w");
- if (!stderr)
- stderr = fdopen (2, "w");
- if (!environ)
- environ = envp;
- #endif /* SHAREABLE_LIB_BUG */
- #endif /* LINK_CRTL_SHARE */
- #endif /* VMS */
-
- /* Record (approximately) where the stack begins. */
- stack_bottom = &stack_bottom_variable;
-
- #ifdef RUN_TIME_REMAP
- if (initialized)
- run_time_remap (argv[0]);
- #endif
-
- #ifdef USG_SHARED_LIBRARIES
- if (bss_end)
- brk (bss_end);
- #endif
-
- clearerr (stdin);
-
- #ifdef BSD
- {
- inherited_pgroup = getpgrp (0);
- setpgrp (0, getpid ());
- }
- #endif
-
-
- #ifdef APOLLO
- #ifndef APOLLO_SR10
- /* If USE_DOMAIN_ACLS environment variable exists,
- use ACLs rather than UNIX modes. */
- if (egetenv ("USE_DOMAIN_ACLS"))
- default_acl (USE_DEFACL);
- #endif
- #endif /* APOLLO */
-
- #ifndef SYSTEM_MALLOC
- if (! initialized)
- {
- /* Arrange to get warning messages as memory fills up. */
- memory_warnings (0, malloc_warning);
-
- /* Arrange to disable interrupt input while malloc and friends are
- running. */
- uninterrupt_malloc ();
- }
- #endif /* not SYSTEM_MALLOC */
-
- #ifdef PRIO_PROCESS
- if (emacs_priority)
- nice (emacs_priority);
- setuid (getuid ());
- #endif /* PRIO_PROCESS */
-
- inhibit_window_system = 0;
-
- /* Handle the -t switch, which specifies filename to use as terminal */
- if (skip_args + 2 < argc && !strcmp (argv[skip_args + 1], "-t"))
- {
- int result;
- skip_args += 2;
- close (0);
- close (1);
- result = open (argv[skip_args], O_RDWR, 2 );
- if (result < 0)
- {
- char *errstring;
-
- if (errno >= 0 && errno < sys_nerr)
- errstring = sys_errlist[errno];
- else
- errstring = "undocumented error code";
- fprintf (stderr, "emacs: %s: %s\n", argv[skip_args], errstring);
- exit (1);
- }
- dup (0);
- if (! isatty (0))
- {
- fprintf (stderr, "emacs: %s: not a tty\n", argv[skip_args]);
- exit (1);
- }
- fprintf (stderr, "Using %s\n", argv[skip_args]);
- #ifdef HAVE_X_WINDOWS
- inhibit_window_system = 1; /* -t => -nw */
- #endif
- }
-
- if (skip_args + 1 < argc
- && (!strcmp (argv[skip_args + 1], "-nw")))
- {
- skip_args += 1;
- inhibit_window_system = 1;
- }
-
- /* Handle the -batch switch, which means don't do interactive display. */
- noninteractive = 0;
- if (skip_args + 1 < argc && !strcmp (argv[skip_args + 1], "-batch"))
- {
- skip_args += 1;
- noninteractive = 1;
- }
-
- #ifdef POSIX_SIGNALS
- init_signals ();
- #endif
-
- if (
- #ifndef CANNOT_DUMP
- ! noninteractive || initialized
- #else
- 1
- #endif
- )
- {
- /* Don't catch these signals in batch mode if not initialized.
- On some machines, this sets static data that would make
- signal fail to work right when the dumped Emacs is run. */
- signal (SIGHUP, fatal_error_signal);
- signal (SIGQUIT, fatal_error_signal);
- signal (SIGILL, fatal_error_signal);
- signal (SIGTRAP, fatal_error_signal);
- #ifdef SIGIOT
- /* This is missing on some systems - OS/2, for example. */
- signal (SIGIOT, fatal_error_signal);
- #endif
- #ifdef SIGEMT
- signal (SIGEMT, fatal_error_signal);
- #endif
- signal (SIGFPE, fatal_error_signal);
- #ifdef SIGBUS
- signal (SIGBUS, fatal_error_signal);
- #endif
- signal (SIGSEGV, fatal_error_signal);
- #ifdef SIGSYS
- signal (SIGSYS, fatal_error_signal);
- #endif
- signal (SIGTERM, fatal_error_signal);
- #ifdef SIGXCPU
- signal (SIGXCPU, fatal_error_signal);
- #endif
- #ifdef SIGXFSZ
- signal (SIGXFSZ, fatal_error_signal);
- #endif /* SIGXFSZ */
-
- #ifdef AIX
- signal (SIGDANGER, fatal_error_signal);
- signal (20, fatal_error_signal);
- signal (21, fatal_error_signal);
- signal (22, fatal_error_signal);
- signal (23, fatal_error_signal);
- signal (24, fatal_error_signal);
- #ifdef SIGIO
- signal (SIGAIO, fatal_error_signal);
- signal (SIGPTY, fatal_error_signal);
- #endif
- #ifndef _I386
- signal (SIGIOINT, fatal_error_signal);
- #endif
- signal (SIGGRANT, fatal_error_signal);
- signal (SIGRETRACT, fatal_error_signal);
- signal (SIGSOUND, fatal_error_signal);
- signal (SIGMSG, fatal_error_signal);
- #endif /* AIX */
- }
-
- noninteractive1 = noninteractive;
-
- /* Perform basic initializations (not merely interning symbols) */
-
- if (!initialized)
- {
- init_alloc_once ();
- init_obarray ();
- init_eval_once ();
- init_syntax_once (); /* Create standard syntax table. */
- /* Must be done before init_buffer */
- init_casetab_once ();
- init_buffer_once (); /* Create buffer table and some buffers */
- init_minibuf_once (); /* Create list of minibuffers */
- /* Must precede init_window_once */
- init_window_once (); /* Init the window system */
- }
-
- init_alloc ();
- init_eval ();
- init_data ();
-
- /* egetenv is a pretty low-level facility, which may get called in
- many circumstances; it seems flimsy to put off initializing it
- until calling init_callproc. */
- set_process_environment ();
-
- init_lread ();
-
- init_cmdargs (argc, argv, skip_args); /* Create list Vcommand_line_args */
- init_buffer (); /* Init default directory of main buffer */
- if (!noninteractive)
- {
- #ifdef VMS
- init_vms_input ();/* init_display calls get_frame_size, that needs this */
- #endif /* VMS */
- init_display (); /* Determine terminal type. init_sys_modes uses results */
- }
- init_keyboard (); /* This too must precede init_sys_modes */
- init_callproc (); /* And this too. */
- #ifdef VMS
- init_vmsproc (); /* And this too. */
- #endif /* VMS */
- init_sys_modes (); /* Init system terminal modes (RAW or CBREAK, etc.) */
- init_xdisp ();
- init_macros ();
- init_editfns ();
- #ifdef LISP_FLOAT_TYPE
- init_floatfns ();
- #endif
- #ifdef VMS
- init_vmsfns ();
- #endif /* VMS */
- init_process ();
- #ifdef CLASH_DETECTION
- init_filelock ();
- #endif /* CLASH_DETECTION */
-
- /* Intern the names of all standard functions and variables; define standard keys */
-
- if (!initialized)
- {
- /* The basic levels of Lisp must come first */
- /* And data must come first of all
- for the sake of symbols like error-message */
- syms_of_data ();
- syms_of_alloc ();
- syms_of_lread ();
- syms_of_print ();
- syms_of_eval ();
- syms_of_fns ();
- #ifdef LISP_FLOAT_TYPE
- syms_of_floatfns ();
- #endif
-
- syms_of_abbrev ();
- syms_of_buffer ();
- syms_of_bytecode ();
- syms_of_callint ();
- syms_of_casefiddle ();
- syms_of_casetab ();
- syms_of_callproc ();
- syms_of_cmds ();
- #ifndef NO_DIR_LIBRARY
- syms_of_dired ();
- #endif /* not NO_DIR_LIBRARY */
- syms_of_display ();
- syms_of_doc ();
- syms_of_editfns ();
- syms_of_emacs ();
- syms_of_fileio ();
- #ifdef CLASH_DETECTION
- syms_of_filelock ();
- #endif /* CLASH_DETECTION */
- syms_of_indent ();
- syms_of_keyboard ();
- syms_of_keymap ();
- syms_of_macros ();
- syms_of_marker ();
- syms_of_minibuf ();
- syms_of_mocklisp ();
- syms_of_process ();
- syms_of_search ();
- syms_of_frame ();
- syms_of_syntax ();
- syms_of_undo ();
-
- /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
- syms_of_textprop ();
- #ifdef VMS
- syms_of_vmsproc ();
- #endif /* VMS */
- syms_of_window ();
- syms_of_xdisp ();
- #ifdef HAVE_X_WINDOWS
- syms_of_xterm ();
- syms_of_xfns ();
- syms_of_xfaces ();
- #ifdef HAVE_X11
- syms_of_xselect ();
- #endif
- #ifdef HAVE_X_MENU
- syms_of_xmenu ();
- #endif /* HAVE_X_MENU */
- #endif /* HAVE_X_WINDOWS */
-
- #ifdef SYMS_SYSTEM
- SYMS_SYSTEM;
- #endif
-
- #ifdef SYMS_MACHINE
- SYMS_MACHINE;
- #endif
-
- keys_of_casefiddle ();
- keys_of_cmds ();
- keys_of_buffer ();
- keys_of_keyboard ();
- keys_of_keymap ();
- keys_of_macros ();
- keys_of_minibuf ();
- keys_of_window ();
- keys_of_frame ();
- }
-
- if (!initialized)
- {
- /* Handle -l loadup-and-dump, args passed by Makefile. */
- if (argc > 2 + skip_args && !strcmp (argv[1 + skip_args], "-l"))
- Vtop_level = Fcons (intern ("load"),
- Fcons (build_string (argv[2 + skip_args]), Qnil));
- #ifdef CANNOT_DUMP
- /* Unless next switch is -nl, load "loadup.el" first thing. */
- if (!(argc > 1 + skip_args && !strcmp (argv[1 + skip_args], "-nl")))
- Vtop_level = Fcons (intern ("load"),
- Fcons (build_string ("loadup.el"), Qnil));
- #endif /* CANNOT_DUMP */
- }
-
- initialized = 1;
-
- #ifdef sun
- /* sun's localtime() has a bug. it caches the value of the time
- zone rather than looking it up every time. Since localtime() is
- called to bolt the undumping time into the undumped emacs, this
- results in localtime() ignoring the TZ environment variable.
- This flushes the new TZ value into localtime(). */
- tzset();
- #endif /* sun */
-
- /* Enter editor command loop. This never returns. */
- Frecursive_edit ();
- /* NOTREACHED */
- }
-
- DEFUN ("kill-emacs", Fkill_emacs, Skill_emacs, 0, 1, "P",
- "Exit the Emacs job and kill it.\n\
- If ARG is an integer, return ARG as the exit program code.\n\
- If ARG is a string, stuff it as keyboard input.\n\n\
- The value of `kill-emacs-hook', if not void,\n\
- is a list of functions (of no args),\n\
- all of which are called before Emacs is actually killed.")
- (arg)
- Lisp_Object arg;
- {
- Lisp_Object hook, hook1;
- int i;
- struct gcpro gcpro1;
-
- GCPRO1 (arg);
-
- if (feof (stdin))
- arg = Qt;
-
- if (!NILP (Vrun_hooks) && !noninteractive)
- call1 (Vrun_hooks, intern ("kill-emacs-hook"));
-
- UNGCPRO;
-
- /* Is it really necessary to do this deassign
- when we are going to exit anyway? */
- /* #ifdef VMS
- stop_vms_input ();
- #endif */
-
- shut_down_emacs (0, 0, STRINGP (arg) ? arg : Qnil);
-
- exit ((XTYPE (arg) == Lisp_Int) ? XINT (arg)
- #ifdef VMS
- : 1
- #else
- : 0
- #endif
- );
- /* NOTREACHED */
- }
-
-
- /* Perform an orderly shutdown of Emacs. Autosave any modified
- buffers, kill any child processes, clean up the terminal modes (if
- we're in the foreground), and other stuff like that. Don't perform
- any redisplay; this may be called when Emacs is shutting down in
- the background, or after its X connection has died.
-
- If SIG is a signal number, print a message for it.
-
- This is called by fatal signal handlers, X protocol error handlers,
- and Fkill_emacs. */
-
- void
- shut_down_emacs (sig, no_x, stuff)
- int sig, no_x;
- Lisp_Object stuff;
- {
- /* If we are controlling the terminal, reset terminal modes */
- #ifdef EMACS_HAVE_TTY_PGRP
- {
- #ifdef USG
- int pgrp = getpgrp ();
- #else
- int pgrp = getpgrp (0);
- #endif
- int tpgrp;
- if (EMACS_GET_TTY_PGRP (0, &tpgrp) != -1
- && tpgrp == pgrp)
- {
- fflush (stdout);
- reset_sys_modes ();
- if (sig && sig != SIGTERM)
- fprintf (stderr, "Fatal error (%d).", sig);
- }
- }
- #else
- fflush (stdout);
- reset_sys_modes ();
- #endif
-
- stuff_buffered_input (stuff);
-
- kill_buffer_processes (Qnil);
- Fdo_auto_save (Qt, Qnil);
-
- #ifdef CLASH_DETECTION
- unlock_all_files ();
- #endif
-
- #ifdef VMS
- kill_vms_processes ();
- #endif
-
- #ifdef HAVE_X_WINDOWS
- if (!noninteractive && EQ (Vwindow_system, intern ("x")) && ! no_x)
- Fx_close_current_connection ();
- #endif /* HAVE_X_WINDOWS */
-
- #ifdef SIGIO
- /* There is a tendency for a SIGIO signal to arrive within exit,
- and cause a SIGHUP because the input descriptor is already closed. */
- unrequest_sigio ();
- signal (SIGIO, SIG_IGN);
- #endif
- }
-
-
-
- #ifndef CANNOT_DUMP
- /* Nothing like this can be implemented on an Apollo.
- What a loss! */
-
- #ifdef HAVE_SHM
-
- DEFUN ("dump-emacs-data", Fdump_emacs_data, Sdump_emacs_data, 1, 1, 0,
- "Dump current state of Emacs into data file FILENAME.\n\
- This function exists on systems that use HAVE_SHM.")
- (intoname)
- Lisp_Object intoname;
- {
- extern int my_edata;
- Lisp_Object tem;
- extern void malloc_warning ();
-
- CHECK_STRING (intoname, 0);
- intoname = Fexpand_file_name (intoname, Qnil);
-
- tem = Vpurify_flag;
- Vpurify_flag = Qnil;
-
- fflush (stdout);
- /* Tell malloc where start of impure now is */
- /* Also arrange for warnings when nearly out of space. */
- #ifndef SYSTEM_MALLOC
- memory_warnings (&my_edata, malloc_warning);
- #endif
- map_out_data (XSTRING (intoname)->data);
-
- Vpurify_flag = tem;
-
- return Qnil;
- }
-
- #else /* not HAVE_SHM */
-
- DEFUN ("dump-emacs", Fdump_emacs, Sdump_emacs, 2, 2, 0,
- "Dump current state of Emacs into executable file FILENAME.\n\
- Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\
- This is used in the file `loadup.el' when building Emacs.\n\
- \n\
- Bind `command-line-processed' to nil before dumping,\n\
- if you want the dumped Emacs to process its command line\n\
- and announce itself normally when it is run.")
- (intoname, symname)
- Lisp_Object intoname, symname;
- {
- extern int my_edata;
- Lisp_Object tem;
- extern void malloc_warning ();
-
- CHECK_STRING (intoname, 0);
- intoname = Fexpand_file_name (intoname, Qnil);
- if (!NILP (symname))
- {
- CHECK_STRING (symname, 0);
- if (XSTRING (symname)->size)
- symname = Fexpand_file_name (symname, Qnil);
- }
-
- tem = Vpurify_flag;
- Vpurify_flag = Qnil;
-
- fflush (stdout);
- #ifdef VMS
- mapout_data (XSTRING (intoname)->data);
- #else
- /* Tell malloc where start of impure now is */
- /* Also arrange for warnings when nearly out of space. */
- #ifndef SYSTEM_MALLOC
- memory_warnings (&my_edata, malloc_warning);
- #endif
- unexec (XSTRING (intoname)->data,
- !NILP (symname) ? XSTRING (symname)->data : 0, &my_edata, 0, 0);
- #endif /* not VMS */
-
- Vpurify_flag = tem;
-
- return Qnil;
- }
-
- #endif /* not HAVE_SHM */
-
- #endif /* not CANNOT_DUMP */
-
- #ifndef SEPCHAR
- #define SEPCHAR ':'
- #endif
-
- Lisp_Object
- decode_env_path (evarname, defalt)
- char *evarname, *defalt;
- {
- register char *path, *p;
- extern char *index ();
-
- Lisp_Object lpath;
-
- /* It's okay to use getenv here, because this function is only used
- to initialize variables when Emacs starts up, and isn't called
- after that. */
- if (evarname != 0)
- path = (char *) getenv (evarname);
- else
- path = 0;
- if (!path)
- path = defalt;
- lpath = Qnil;
- while (1)
- {
- p = index (path, SEPCHAR);
- if (!p) p = path + strlen (path);
- lpath = Fcons (p - path ? make_string (path, p - path) : Qnil,
- lpath);
- if (*p)
- path = p + 1;
- else
- break;
- }
- return Fnreverse (lpath);
- }
-
- syms_of_emacs ()
- {
- #ifndef CANNOT_DUMP
- #ifdef HAVE_SHM
- defsubr (&Sdump_emacs_data);
- #else
- defsubr (&Sdump_emacs);
- #endif
- #endif
-
- defsubr (&Skill_emacs);
-
- defsubr (&Sinvocation_name);
-
- DEFVAR_LISP ("command-line-args", &Vcommand_line_args,
- "Args passed by shell to Emacs, as a list of strings.");
-
- DEFVAR_LISP ("system-type", &Vsystem_type,
- "Value is symbol indicating type of operating system you are using.");
- Vsystem_type = intern (SYSTEM_TYPE);
-
- DEFVAR_BOOL ("noninteractive", &noninteractive1,
- "Non-nil means Emacs is running without interactive terminal.");
-
- DEFVAR_LISP ("kill-emacs-hook", &Vkill_emacs_hook,
- "Hook to be run whenever kill-emacs is called.\n\
- Since kill-emacs may be invoked when the terminal is disconnected (or\n\
- in other similar situations), functions placed on this hook should not\n\
- expect to be able to interact with the user.");
- Vkill_emacs_hook = Qnil;
-
- DEFVAR_INT ("emacs-priority", &emacs_priority,
- "Priority for Emacs to run at.\n\
- This value is effective only if set before Emacs is dumped,\n\
- and only if the Emacs executable is installed with setuid to permit\n\
- it to change priority. (Emacs sets its uid back to the real uid.)");
- emacs_priority = 0;
-
- staticpro (&Vinvocation_name);
- Vinvocation_name = Qnil;
- }
-