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
27 #include <dbus/dbus-internals.h>
28 #include <dbus/dbus-watch.h>
40 static BusContext *context;
42 static int reload_pipe[2];
43 #define RELOAD_READ_END 0
44 #define RELOAD_WRITE_END 1
46 static void close_reload_pipe (DBusWatch **);
47 static void close_reload_pipe_write (void);
50 signal_handler (int sig)
55 #ifdef DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX
57 /* explicit fall-through */
58 #endif /* DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX */
63 _dbus_string_init_const (&str, "foo");
64 if ((reload_pipe[RELOAD_WRITE_END] > 0) &&
65 !_dbus_write_socket (reload_pipe[RELOAD_WRITE_END], &str, 0, 1))
67 _dbus_warn ("Unable to write to reload pipe.\n");
68 close_reload_pipe_write ();
79 fprintf (stderr, DBUS_DAEMON_NAME " [--version] [--session] [--system] [--config-file=FILE] [--print-address[=DESCRIPTOR]] [--print-pid[=DESCRIPTOR]] [--fork] [--nofork] [--introspect] [--address=ADDRESS] [--systemd-activation]\n");
86 printf ("D-Bus Message Bus Daemon %s\n"
87 "Copyright (C) 2002, 2003 Red Hat, Inc., CodeFactory AB, and others\n"
88 "This is free software; see the source for copying conditions.\n"
89 "There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",
100 if (!_dbus_string_init (&xml))
103 if (!bus_driver_generate_introspect_string (&xml))
105 _dbus_string_free (&xml);
109 v_STRING = _dbus_string_get_const_data (&xml);
110 printf ("%s\n", v_STRING);
115 _dbus_warn ("Can not introspect - Out of memory\n");
120 check_two_config_files (const DBusString *config_file,
121 const char *extra_arg)
123 if (_dbus_string_get_length (config_file) > 0)
125 fprintf (stderr, "--%s specified but configuration file %s already requested\n",
126 extra_arg, _dbus_string_get_const_data (config_file));
132 check_two_addresses (const DBusString *address,
133 const char *extra_arg)
135 if (_dbus_string_get_length (address) > 0)
137 fprintf (stderr, "--%s specified but address %s already requested\n",
138 extra_arg, _dbus_string_get_const_data (address));
144 check_two_addr_descriptors (const DBusString *addr_fd,
145 const char *extra_arg)
147 if (_dbus_string_get_length (addr_fd) > 0)
149 fprintf (stderr, "--%s specified but printing address to %s already requested\n",
150 extra_arg, _dbus_string_get_const_data (addr_fd));
156 check_two_pid_descriptors (const DBusString *pid_fd,
157 const char *extra_arg)
159 if (_dbus_string_get_length (pid_fd) > 0)
161 fprintf (stderr, "--%s specified but printing pid to %s already requested\n",
162 extra_arg, _dbus_string_get_const_data (pid_fd));
168 handle_reload_watch (DBusWatch *watch,
175 while (!_dbus_string_init (&str))
176 _dbus_wait_for_memory ();
178 if ((reload_pipe[RELOAD_READ_END] > 0) &&
179 _dbus_read_socket (reload_pipe[RELOAD_READ_END], &str, 1) != 1)
181 _dbus_warn ("Couldn't read from reload pipe.\n");
182 close_reload_pipe (&watch);
185 _dbus_string_free (&str);
187 /* this can only fail if we don't understand the config file
188 * or OOM. Either way we should just stick with the currently
191 dbus_error_init (&error);
192 if (! bus_context_reload_config (context, &error))
194 _DBUS_ASSERT_ERROR_IS_SET (&error);
195 _dbus_assert (dbus_error_has_name (&error, DBUS_ERROR_FAILED) ||
196 dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY));
197 _dbus_warn ("Unable to reload configuration: %s\n",
199 dbus_error_free (&error);
205 reload_watch_callback (DBusWatch *watch,
206 unsigned int condition,
209 return dbus_watch_handle (watch, condition);
213 setup_reload_pipe (DBusLoop *loop)
218 dbus_error_init (&error);
220 if (!_dbus_full_duplex_pipe (&reload_pipe[0], &reload_pipe[1],
223 _dbus_warn ("Unable to create reload pipe: %s\n",
225 dbus_error_free (&error);
229 watch = _dbus_watch_new (reload_pipe[RELOAD_READ_END],
230 DBUS_WATCH_READABLE, TRUE,
231 handle_reload_watch, NULL, NULL);
235 _dbus_warn ("Unable to create reload watch: %s\n",
237 dbus_error_free (&error);
241 if (!_dbus_loop_add_watch (loop, watch, reload_watch_callback,
244 _dbus_warn ("Unable to add reload watch to main loop: %s\n",
246 dbus_error_free (&error);
253 close_reload_pipe (DBusWatch **watch)
255 _dbus_loop_remove_watch (bus_context_get_loop (context),
256 *watch, reload_watch_callback, NULL);
257 _dbus_watch_invalidate (*watch);
258 _dbus_watch_unref (*watch);
261 _dbus_close_socket (reload_pipe[RELOAD_READ_END], NULL);
262 reload_pipe[RELOAD_READ_END] = -1;
264 close_reload_pipe_write ();
267 /* this is the only bit that's safe to do from an async signal handler */
269 close_reload_pipe_write (void)
271 _dbus_close_socket (reload_pipe[RELOAD_WRITE_END], NULL);
272 reload_pipe[RELOAD_WRITE_END] = -1;
276 main (int argc, char **argv)
279 DBusString config_file;
283 const char *prev_arg;
284 DBusPipe print_addr_pipe;
285 DBusPipe print_pid_pipe;
287 dbus_bool_t print_address;
288 dbus_bool_t print_pid;
289 dbus_bool_t is_session_bus;
291 dbus_bool_t systemd_activation;
293 if (!_dbus_string_init (&config_file))
296 if (!_dbus_string_init (&address))
299 if (!_dbus_string_init (&addr_fd))
302 if (!_dbus_string_init (&pid_fd))
305 print_address = FALSE;
307 is_session_bus = FALSE;
308 force_fork = FORK_FOLLOW_CONFIG_FILE;
309 systemd_activation = FALSE;
315 const char *arg = argv[i];
317 if (strcmp (arg, "--help") == 0 ||
318 strcmp (arg, "-h") == 0 ||
319 strcmp (arg, "-?") == 0)
321 else if (strcmp (arg, "--version") == 0)
323 else if (strcmp (arg, "--introspect") == 0)
325 else if (strcmp (arg, "--nofork") == 0)
326 force_fork = FORK_NEVER;
327 else if (strcmp (arg, "--fork") == 0)
328 force_fork = FORK_ALWAYS;
329 else if (strcmp (arg, "--systemd-activation") == 0)
330 systemd_activation = TRUE;
331 else if (strcmp (arg, "--system") == 0)
333 check_two_config_files (&config_file, "system");
335 if (!_dbus_append_system_config_file (&config_file))
338 else if (strcmp (arg, "--session") == 0)
340 check_two_config_files (&config_file, "session");
342 if (!_dbus_append_session_config_file (&config_file))
345 else if (strstr (arg, "--config-file=") == arg)
349 check_two_config_files (&config_file, "config-file");
351 file = strchr (arg, '=');
354 if (!_dbus_string_append (&config_file, file))
358 strcmp (prev_arg, "--config-file") == 0)
360 check_two_config_files (&config_file, "config-file");
362 if (!_dbus_string_append (&config_file, arg))
365 else if (strcmp (arg, "--config-file") == 0)
366 ; /* wait for next arg */
367 else if (strstr (arg, "--address=") == arg)
371 check_two_addresses (&address, "address");
373 file = strchr (arg, '=');
376 if (!_dbus_string_append (&address, file))
380 strcmp (prev_arg, "--address") == 0)
382 check_two_addresses (&address, "address");
384 if (!_dbus_string_append (&address, arg))
387 else if (strcmp (arg, "--address") == 0)
388 ; /* wait for next arg */
389 else if (strstr (arg, "--print-address=") == arg)
393 check_two_addr_descriptors (&addr_fd, "print-address");
395 desc = strchr (arg, '=');
398 if (!_dbus_string_append (&addr_fd, desc))
401 print_address = TRUE;
404 strcmp (prev_arg, "--print-address") == 0)
406 check_two_addr_descriptors (&addr_fd, "print-address");
408 if (!_dbus_string_append (&addr_fd, arg))
411 print_address = TRUE;
413 else if (strcmp (arg, "--print-address") == 0)
414 print_address = TRUE; /* and we'll get the next arg if appropriate */
415 else if (strstr (arg, "--print-pid=") == arg)
419 check_two_pid_descriptors (&pid_fd, "print-pid");
421 desc = strchr (arg, '=');
424 if (!_dbus_string_append (&pid_fd, desc))
430 strcmp (prev_arg, "--print-pid") == 0)
432 check_two_pid_descriptors (&pid_fd, "print-pid");
434 if (!_dbus_string_append (&pid_fd, arg))
439 else if (strcmp (arg, "--print-pid") == 0)
440 print_pid = TRUE; /* and we'll get the next arg if appropriate */
449 if (_dbus_string_get_length (&config_file) == 0)
451 fprintf (stderr, "No configuration file specified.\n");
455 _dbus_pipe_invalidate (&print_addr_pipe);
458 _dbus_pipe_init_stdout (&print_addr_pipe);
459 if (_dbus_string_get_length (&addr_fd) > 0)
463 if (!_dbus_string_parse_int (&addr_fd, 0, &val, &end) ||
464 end != _dbus_string_get_length (&addr_fd) ||
465 val < 0 || val > _DBUS_INT_MAX)
467 fprintf (stderr, "Invalid file descriptor: \"%s\"\n",
468 _dbus_string_get_const_data (&addr_fd));
472 _dbus_pipe_init (&print_addr_pipe, val);
475 _dbus_string_free (&addr_fd);
477 _dbus_pipe_invalidate (&print_pid_pipe);
480 _dbus_pipe_init_stdout (&print_pid_pipe);
481 if (_dbus_string_get_length (&pid_fd) > 0)
485 if (!_dbus_string_parse_int (&pid_fd, 0, &val, &end) ||
486 end != _dbus_string_get_length (&pid_fd) ||
487 val < 0 || val > _DBUS_INT_MAX)
489 fprintf (stderr, "Invalid file descriptor: \"%s\"\n",
490 _dbus_string_get_const_data (&pid_fd));
494 _dbus_pipe_init (&print_pid_pipe, val);
497 _dbus_string_free (&pid_fd);
499 if (!bus_selinux_pre_init ())
501 _dbus_warn ("SELinux pre-initialization failed\n");
505 dbus_error_init (&error);
506 context = bus_context_new (&config_file, force_fork,
507 &print_addr_pipe, &print_pid_pipe,
508 _dbus_string_get_length(&address) > 0 ? &address : NULL,
511 _dbus_string_free (&config_file);
514 _dbus_warn ("Failed to start message bus: %s\n",
516 dbus_error_free (&error);
520 /* bus_context_new() closes the print_addr_pipe and
524 setup_reload_pipe (bus_context_get_loop (context));
527 _dbus_set_signal_handler (SIGHUP, signal_handler);
529 #ifdef DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX
530 _dbus_set_signal_handler (SIGIO, signal_handler);
531 #endif /* DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX */
533 _dbus_verbose ("We are on D-Bus...\n");
534 _dbus_loop_run (bus_context_get_loop (context));
536 bus_context_shutdown (context);
537 bus_context_unref (context);
538 bus_selinux_shutdown ();