1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* main.c main() for message bus
4 * Copyright (C) 2003 Red Hat, Inc.
6 * Licensed under the Academic Free License version 2.1
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include <dbus/dbus-internals.h>
26 #include <dbus/dbus-watch.h>
36 static BusContext *context;
38 static int reload_pipe[2];
39 #define RELOAD_READ_END 0
40 #define RELOAD_WRITE_END 1
42 static void close_reload_pipe (void);
45 signal_handler (int sig)
50 #ifdef DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX
52 /* explicit fall-through */
53 #endif /* DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX */
58 _dbus_string_init_const (&str, "foo");
59 if ((reload_pipe[RELOAD_WRITE_END] > 0) &&
60 !_dbus_write_socket (reload_pipe[RELOAD_WRITE_END], &str, 0, 1))
62 _dbus_warn ("Unable to write to reload pipe.\n");
69 _dbus_loop_quit (bus_context_get_loop (context));
77 fprintf (stderr, DBUS_DAEMON_NAME " [--version] [--session] [--system] [--config-file=FILE] [--print-address[=DESCRIPTOR]] [--print-pid[=DESCRIPTOR]] [--fork] [--nofork] [--introspect]\n");
84 printf ("D-Bus Message Bus Daemon %s\n"
85 "Copyright (C) 2002, 2003 Red Hat, Inc., CodeFactory AB, and others\n"
86 "This is free software; see the source for copying conditions.\n"
87 "There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",
98 if (!_dbus_string_init (&xml))
101 if (!bus_driver_generate_introspect_string (&xml))
103 _dbus_string_free (&xml);
107 v_STRING = _dbus_string_get_const_data (&xml);
108 printf ("%s\n", v_STRING);
113 _dbus_warn ("Can not introspect - Out of memory\n");
117 check_two_config_files (const DBusString *config_file,
118 const char *extra_arg)
120 if (_dbus_string_get_length (config_file) > 0)
122 fprintf (stderr, "--%s specified but configuration file %s already requested\n",
123 extra_arg, _dbus_string_get_const_data (config_file));
129 check_two_addr_descriptors (const DBusString *addr_fd,
130 const char *extra_arg)
132 if (_dbus_string_get_length (addr_fd) > 0)
134 fprintf (stderr, "--%s specified but printing address to %s already requested\n",
135 extra_arg, _dbus_string_get_const_data (addr_fd));
141 check_two_pid_descriptors (const DBusString *pid_fd,
142 const char *extra_arg)
144 if (_dbus_string_get_length (pid_fd) > 0)
146 fprintf (stderr, "--%s specified but printing pid to %s already requested\n",
147 extra_arg, _dbus_string_get_const_data (pid_fd));
153 handle_reload_watch (DBusWatch *watch,
160 while (!_dbus_string_init (&str))
161 _dbus_wait_for_memory ();
163 if ((reload_pipe[RELOAD_READ_END] > 0) &&
164 _dbus_read_socket (reload_pipe[RELOAD_READ_END], &str, 1) != 1)
166 _dbus_warn ("Couldn't read from reload pipe.\n");
167 close_reload_pipe ();
170 _dbus_string_free (&str);
172 /* this can only fail if we don't understand the config file
173 * or OOM. Either way we should just stick with the currently
176 dbus_error_init (&error);
177 if (! bus_context_reload_config (context, &error))
179 _DBUS_ASSERT_ERROR_IS_SET (&error);
180 _dbus_assert (dbus_error_has_name (&error, DBUS_ERROR_FAILED) ||
181 dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY));
182 _dbus_warn ("Unable to reload configuration: %s\n",
184 dbus_error_free (&error);
190 reload_watch_callback (DBusWatch *watch,
191 unsigned int condition,
194 return dbus_watch_handle (watch, condition);
198 setup_reload_pipe (DBusLoop *loop)
203 dbus_error_init (&error);
205 if (!_dbus_full_duplex_pipe (&reload_pipe[0], &reload_pipe[1],
208 _dbus_warn ("Unable to create reload pipe: %s\n",
210 dbus_error_free (&error);
214 watch = _dbus_watch_new (reload_pipe[RELOAD_READ_END],
215 DBUS_WATCH_READABLE, TRUE,
216 handle_reload_watch, NULL, NULL);
220 _dbus_warn ("Unable to create reload watch: %s\n",
222 dbus_error_free (&error);
226 if (!_dbus_loop_add_watch (loop, watch, reload_watch_callback,
229 _dbus_warn ("Unable to add reload watch to main loop: %s\n",
231 dbus_error_free (&error);
238 close_reload_pipe (void)
240 _dbus_close_socket (reload_pipe[RELOAD_READ_END], NULL);
241 reload_pipe[RELOAD_READ_END] = -1;
243 _dbus_close_socket (reload_pipe[RELOAD_WRITE_END], NULL);
244 reload_pipe[RELOAD_WRITE_END] = -1;
248 main (int argc, char **argv)
251 DBusString config_file;
254 const char *prev_arg;
255 DBusPipe print_addr_pipe;
256 DBusPipe print_pid_pipe;
258 dbus_bool_t print_address;
259 dbus_bool_t print_pid;
260 dbus_bool_t is_session_bus;
263 if (!_dbus_string_init (&config_file))
266 if (!_dbus_string_init (&addr_fd))
269 if (!_dbus_string_init (&pid_fd))
272 print_address = FALSE;
274 is_session_bus = FALSE;
275 force_fork = FORK_FOLLOW_CONFIG_FILE;
281 const char *arg = argv[i];
283 if (strcmp (arg, "--help") == 0 ||
284 strcmp (arg, "-h") == 0 ||
285 strcmp (arg, "-?") == 0)
287 else if (strcmp (arg, "--version") == 0)
289 else if (strcmp (arg, "--introspect") == 0)
291 else if (strcmp (arg, "--nofork") == 0)
292 force_fork = FORK_NEVER;
293 else if (strcmp (arg, "--fork") == 0)
294 force_fork = FORK_ALWAYS;
295 else if (strcmp (arg, "--system") == 0)
297 check_two_config_files (&config_file, "system");
299 if (!_dbus_append_system_config_file (&config_file))
302 else if (strcmp (arg, "--session") == 0)
304 check_two_config_files (&config_file, "session");
306 if (!_dbus_append_session_config_file (&config_file))
309 else if (strstr (arg, "--config-file=") == arg)
313 check_two_config_files (&config_file, "config-file");
315 file = strchr (arg, '=');
318 if (!_dbus_string_append (&config_file, file))
322 strcmp (prev_arg, "--config-file") == 0)
324 check_two_config_files (&config_file, "config-file");
326 if (!_dbus_string_append (&config_file, arg))
329 else if (strcmp (arg, "--config-file") == 0)
330 ; /* wait for next arg */
331 else if (strstr (arg, "--print-address=") == arg)
335 check_two_addr_descriptors (&addr_fd, "print-address");
337 desc = strchr (arg, '=');
340 if (!_dbus_string_append (&addr_fd, desc))
343 print_address = TRUE;
346 strcmp (prev_arg, "--print-address") == 0)
348 check_two_addr_descriptors (&addr_fd, "print-address");
350 if (!_dbus_string_append (&addr_fd, arg))
353 print_address = TRUE;
355 else if (strcmp (arg, "--print-address") == 0)
356 print_address = TRUE; /* and we'll get the next arg if appropriate */
357 else if (strstr (arg, "--print-pid=") == arg)
361 check_two_pid_descriptors (&pid_fd, "print-pid");
363 desc = strchr (arg, '=');
366 if (!_dbus_string_append (&pid_fd, desc))
372 strcmp (prev_arg, "--print-pid") == 0)
374 check_two_pid_descriptors (&pid_fd, "print-pid");
376 if (!_dbus_string_append (&pid_fd, arg))
381 else if (strcmp (arg, "--print-pid") == 0)
382 print_pid = TRUE; /* and we'll get the next arg if appropriate */
391 if (_dbus_string_get_length (&config_file) == 0)
393 fprintf (stderr, "No configuration file specified.\n");
397 _dbus_pipe_invalidate (&print_addr_pipe);
400 _dbus_pipe_init_stdout (&print_addr_pipe);
401 if (_dbus_string_get_length (&addr_fd) > 0)
405 if (!_dbus_string_parse_int (&addr_fd, 0, &val, &end) ||
406 end != _dbus_string_get_length (&addr_fd) ||
407 val < 0 || val > _DBUS_INT_MAX)
409 fprintf (stderr, "Invalid file descriptor: \"%s\"\n",
410 _dbus_string_get_const_data (&addr_fd));
414 _dbus_pipe_init (&print_addr_pipe, val);
417 _dbus_string_free (&addr_fd);
419 _dbus_pipe_invalidate (&print_pid_pipe);
422 _dbus_pipe_init_stdout (&print_pid_pipe);
423 if (_dbus_string_get_length (&pid_fd) > 0)
427 if (!_dbus_string_parse_int (&pid_fd, 0, &val, &end) ||
428 end != _dbus_string_get_length (&pid_fd) ||
429 val < 0 || val > _DBUS_INT_MAX)
431 fprintf (stderr, "Invalid file descriptor: \"%s\"\n",
432 _dbus_string_get_const_data (&pid_fd));
436 _dbus_pipe_init (&print_pid_pipe, val);
439 _dbus_string_free (&pid_fd);
441 if (!bus_selinux_pre_init ())
443 _dbus_warn ("SELinux pre-initialization failed\n");
447 dbus_error_init (&error);
448 context = bus_context_new (&config_file, force_fork,
449 &print_addr_pipe, &print_pid_pipe,
451 _dbus_string_free (&config_file);
454 _dbus_warn ("Failed to start message bus: %s\n",
456 dbus_error_free (&error);
460 is_session_bus = bus_context_get_type(context) != NULL
461 && strcmp(bus_context_get_type(context),"session") == 0;
464 _dbus_daemon_publish_session_bus_address (bus_context_get_address (context));
466 /* bus_context_new() closes the print_addr_pipe and
470 setup_reload_pipe (bus_context_get_loop (context));
473 _dbus_set_signal_handler (SIGHUP, signal_handler);
475 _dbus_set_signal_handler (SIGTERM, signal_handler);
476 #ifdef DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX
477 _dbus_set_signal_handler (SIGIO, signal_handler);
478 #endif /* DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX */
480 _dbus_verbose ("We are on D-Bus...\n");
481 _dbus_loop_run (bus_context_get_loop (context));
483 bus_context_shutdown (context);
484 bus_context_unref (context);
485 bus_selinux_shutdown ();
488 _dbus_daemon_unpublish_session_bus_address ();