nil means get them only from PATH_LOADSEARCH. */
Lisp_Object Vinstallation_directory;
+/* The values of `current-time' before and after Emacs initialization. */
+Lisp_Object Vbefore_init_time, Vafter_init_time;
+
/* Hook run by `kill-emacs' before it does really anything. */
Lisp_Object Vkill_emacs_hook;
/* The gap between BSS end and heap start as far as we can tell. */
static unsigned long heap_bss_diff;
-/* If the gap between BSS end and heap start is larger than this we try to
- work around it, and if that fails, output a warning in dump-emacs. */
+/* If the gap between BSS end and heap start is larger than this
+ output a warning in dump-emacs. */
#define MAX_HEAP_BSS_DIFF (1024*1024)
int noninteractive1;
+/* Name for the server started by the daemon.*/
+static char *daemon_name;
+
+/* Pipe used to send exit notification to the daemon parent at
+ startup. */
+int daemon_pipe[2];
+
/* Save argv and argc. */
char **initial_argv;
int initial_argc;
Initialization options:\n\
\n\
--batch do not do interactive display; implies -q\n\
+--daemon start a server in the background\n\
--debug-init enable Emacs Lisp debugger for init file\n\
--display, -d DISPLAY use X server DISPLAY\n\
--multibyte, --no-unibyte inhibit the effect of EMACS_UNIBYTE\n\
Action options:\n\
\n\
FILE visit FILE using find-file\n\
-+LINE go to line LINE in next FILE\n\
-+LINE:COLUMN go to line LINE, column COLUMN, in next FILE\n\
++LINE go to line LINE in next FILE\n\
++LINE:COLUMN go to line LINE, column COLUMN, in next FILE\n\
--directory, -L DIR add DIR to variable load-path\n\
--eval EXPR evaluate Emacs Lisp expression EXPR\n\
--execute EXPR evaluate Emacs Lisp expression EXPR\n\
#endif
int no_loadup = 0;
char *junk = 0;
+ char *dname_arg = 0;
#if GC_MARK_STACK
extern Lisp_Object *stack_base;
run_time_remap (argv[0]);
#endif
-#if defined (NS_IMPL_COCOA)
+/* If using unexmacosx.c (set by s/darwin.h), we must do this. */
+#ifdef DARWIN_OS
if (!initialized)
unexec_init_emacs_zone ();
#endif
}
#ifdef HAVE_PERSONALITY_LINUX32
- /* See if there is a gap between the end of BSS and the heap.
- In that case, set personality and exec ourself again. */
if (!initialized
&& (strcmp (argv[argc-1], "dump") == 0
|| strcmp (argv[argc-1], "bootstrap") == 0)
- && heap_bss_diff > MAX_HEAP_BSS_DIFF)
+ && ! getenv ("EMACS_HEAP_EXEC"))
{
- if (! getenv ("EMACS_HEAP_EXEC"))
- {
- /* Set this so we only do this once. */
- putenv("EMACS_HEAP_EXEC=true");
+ /* Set this so we only do this once. */
+ putenv("EMACS_HEAP_EXEC=true");
- /* A flag to turn off address randomization which is introduced
- in linux kernel shipped with fedora core 4 */
+ /* A flag to turn off address randomization which is introduced
+ in linux kernel shipped with fedora core 4 */
#define ADD_NO_RANDOMIZE 0x0040000
- personality (PER_LINUX32 | ADD_NO_RANDOMIZE);
+ personality (PER_LINUX32 | ADD_NO_RANDOMIZE);
#undef ADD_NO_RANDOMIZE
- execvp (argv[0], argv);
+ execvp (argv[0], argv);
- /* If the exec fails, try to dump anyway. */
- perror ("execvp");
- }
+ /* If the exec fails, try to dump anyway. */
+ perror ("execvp");
}
#endif /* HAVE_PERSONALITY_LINUX32 */
exit (0);
}
+ if (argmatch (argv, argc, "-daemon", "--daemon", 5, NULL, &skip_args)
+ || argmatch (argv, argc, "-daemon", "--daemon", 5, &dname_arg, &skip_args))
+ {
+#ifndef DOS_NT
+ pid_t f;
+
+ /* Start as a daemon: fork a new child process which will run the
+ rest of the initialization code, then exit.
+
+ Detaching a daemon requires the following steps:
+ - fork
+ - setsid
+ - exit the parent
+ - close the tty file-descriptors
+
+ We only want to do the last 2 steps once the daemon is ready to
+ serve requests, i.e. after loading .emacs (initialization).
+ OTOH initialization may start subprocesses (e.g. ispell) and these
+ should be run from the proper process (the one that will end up
+ running as daemon) and with the proper "session id" in order for
+ them to keep working after detaching, so fork and setsid need to be
+ performed before initialization.
+
+ We want to avoid exiting before the server socket is ready, so
+ use a pipe for synchronization. The parent waits for the child
+ to close its end of the pipe (using `daemon-initialized')
+ before exiting. */
+ if (pipe (daemon_pipe) == -1)
+ {
+ fprintf (stderr, "Cannot pipe!\n");
+ exit (1);
+ }
+
+ f = fork ();
+ if (f > 0)
+ {
+ int retval;
+ char buf[1];
+
+ /* Close unused writing end of the pipe. */
+ close (daemon_pipe[1]);
+
+ /* Just wait for the child to close its end of the pipe. */
+ do
+ {
+ retval = read (daemon_pipe[0], &buf, 1);
+ }
+ while (retval == -1 && errno == EINTR);
+
+ if (retval < 0)
+ {
+ fprintf (stderr, "Error reading status from child\n");
+ exit (1);
+ }
+ else if (retval == 0)
+ {
+ fprintf (stderr, "Error: server did not start correctly\n");
+ exit (1);
+ }
+
+ close (daemon_pipe[0]);
+ exit (0);
+ }
+ if (f < 0)
+ {
+ fprintf (stderr, "Cannot fork!\n");
+ exit (1);
+ }
+
+ if (dname_arg)
+ daemon_name = xstrdup (dname_arg);
+ /* Close unused reading end of the pipe. */
+ close (daemon_pipe[0]);
+ /* Make sure that the used end of the pipe is closed on exec, so
+ that it is not accessible to programs started from .emacs. */
+ fcntl (daemon_pipe[1], F_SETFD, FD_CLOEXEC);
+
+#ifdef HAVE_SETSID
+ setsid();
+#endif
+#else /* DOS_NT */
+ fprintf (stderr, "This platform does not support the -daemon flag.\n");
+ exit (1);
+#endif /* DOS_NT */
+ }
+
if (! noninteractive)
{
#ifdef BSD_PGRPS
if (!strncmp(argv[skip_args], "-psn", 4))
{
skip_args += 1;
+ chdir (getenv ("HOME"));
}
- else
+ else if (skip_args+1 < argc && !strncmp(argv[skip_args+1], "-psn", 4))
{
- if (skip_args+1 < argc && !strncmp(argv[skip_args+1], "-psn", 4))
- skip_args += 2;
+ skip_args += 2;
+ chdir (getenv ("HOME"));
}
}
#endif
syms_of_fontset ();
#endif /* HAVE_NTGUI */
+#ifdef MSDOS
+ syms_of_xmenu ();
+#endif /* MSDOS */
+
#ifdef HAVE_NS
syms_of_nsterm ();
syms_of_nsfns ();
{ "-nw", "--no-windows", 110, 0 },
{ "-batch", "--batch", 100, 0 },
{ "-script", "--script", 100, 1 },
+ { "-daemon", "--daemon", 99, 0 },
{ "-help", "--help", 90, 0 },
{ "-no-unibyte", "--no-unibyte", 83, 0 },
{ "-multibyte", "--multibyte", 82, 0 },
return Fnreverse (lpath);
}
+DEFUN ("daemonp", Fdaemonp, Sdaemonp, 0, 0, 0,
+ doc: /* Return non-nil if the current emacs process is a daemon.
+If the daemon was given a name argument, return that name. */)
+ ()
+{
+ if (IS_DAEMON)
+ if (daemon_name)
+ return build_string (daemon_name);
+ else
+ return Qt;
+ else
+ return Qnil;
+}
+
+DEFUN ("daemon-initialized", Fdaemon_initialized, Sdaemon_initialized, 0, 0, 0,
+ doc: /* Mark the Emacs daemon as being initialized.
+This finishes the daemonization process by doing the other half of detaching
+from the parent process and its tty file descriptors. */)
+ ()
+{
+ int nfd;
+
+ if (!IS_DAEMON)
+ error ("This function can only be called if emacs is run as a daemon");
+
+ if (daemon_pipe[1] < 0)
+ error ("The daemon has already been initialized");
+
+ if (NILP (Vafter_init_time))
+ error ("This function can only be called after loading the init files");
+
+ /* Get rid of stdin, stdout and stderr. */
+ nfd = open ("/dev/null", O_RDWR);
+ dup2 (nfd, 0);
+ dup2 (nfd, 1);
+ dup2 (nfd, 2);
+ close (nfd);
+
+ /* Closing the pipe will notify the parent that it can exit.
+ FIXME: In case some other process inherited the pipe, closing it here
+ won't notify the parent because it's still open elsewhere, so we
+ additionally send a byte, just to make sure the parent really exits.
+ Instead, we should probably close the pipe in start-process and
+ call-process to make sure the pipe is never inherited by
+ subprocesses. */
+ write (daemon_pipe[1], "\n", 1);
+ close (daemon_pipe[1]);
+ /* Set it to an invalid value so we know we've already run this function. */
+ daemon_pipe[1] = -1;
+ return Qt;
+}
+
void
syms_of_emacs ()
{
defsubr (&Sinvocation_name);
defsubr (&Sinvocation_directory);
+ defsubr (&Sdaemonp);
+ defsubr (&Sdaemon_initialized);
DEFVAR_LISP ("command-line-args", &Vcommand_line_args,
doc: /* Args passed by shell to Emacs, as a list of strings.
DEFVAR_LISP ("previous-system-time-locale", &Vprevious_system_time_locale,
doc: /* Most recently used system locale for time. */);
Vprevious_system_time_locale = Qnil;
+
+ DEFVAR_LISP ("before-init-time", &Vbefore_init_time,
+ doc: /* Value of `current-time' before Emacs begins initialization. */);
+ Vbefore_init_time = Qnil;
+
+ DEFVAR_LISP ("after-init-time", &Vafter_init_time,
+ doc: /* Value of `current-time' after loading the init files.
+This is nil during initialization. */);
+ Vafter_init_time = Qnil;
+
+ /* Make sure IS_DAEMON starts up as false. */
+ daemon_pipe[1] = 0;
}
/* arch-tag: 7bfd356a-c720-4612-8ab6-aa4222931c2e
HCoop / bpt / emacs.git / blobdiff