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 (void);
49 signal_handler (int sig)
54 #ifdef DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX
56 /* explicit fall-through */
57 #endif /* DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX */
62 _dbus_string_init_const (&str, "foo");
63 if ((reload_pipe[RELOAD_WRITE_END] > 0) &&
64 !_dbus_write_socket (reload_pipe[RELOAD_WRITE_END], &str, 0, 1))
66 _dbus_warn ("Unable to write to reload pipe.\n");
78 fprintf (stderr, DBUS_DAEMON_NAME " [--version] [--session] [--system] [--config-file=FILE] [--print-address[=DESCRIPTOR]] [--print-pid[=DESCRIPTOR]] [--fork] [--nofork] [--introspect]\n");
85 printf ("D-Bus Message Bus Daemon %s\n"
86 "Copyright (C) 2002, 2003 Red Hat, Inc., CodeFactory AB, and others\n"
87 "This is free software; see the source for copying conditions.\n"
88 "There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",
99 if (!_dbus_string_init (&xml))
102 if (!bus_driver_generate_introspect_string (&xml))
104 _dbus_string_free (&xml);
108 v_STRING = _dbus_string_get_const_data (&xml);
109 printf ("%s\n", v_STRING);
114 _dbus_warn ("Can not introspect - Out of memory\n");
118 check_two_config_files (const DBusString *config_file,
119 const char *extra_arg)
121 if (_dbus_string_get_length (config_file) > 0)
123 fprintf (stderr, "--%s specified but configuration file %s already requested\n",
124 extra_arg, _dbus_string_get_const_data (config_file));
130 check_two_addr_descriptors (const DBusString *addr_fd,
131 const char *extra_arg)
133 if (_dbus_string_get_length (addr_fd) > 0)
135 fprintf (stderr, "--%s specified but printing address to %s already requested\n",
136 extra_arg, _dbus_string_get_const_data (addr_fd));
142 check_two_pid_descriptors (const DBusString *pid_fd,
143 const char *extra_arg)
145 if (_dbus_string_get_length (pid_fd) > 0)
147 fprintf (stderr, "--%s specified but printing pid to %s already requested\n",
148 extra_arg, _dbus_string_get_const_data (pid_fd));
154 handle_reload_watch (DBusWatch *watch,
161 while (!_dbus_string_init (&str))
162 _dbus_wait_for_memory ();
164 if ((reload_pipe[RELOAD_READ_END] > 0) &&
165 _dbus_read_socket (reload_pipe[RELOAD_READ_END], &str, 1) != 1)
167 _dbus_warn ("Couldn't read from reload pipe.\n");
168 close_reload_pipe ();
171 _dbus_string_free (&str);
173 /* this can only fail if we don't understand the config file
174 * or OOM. Either way we should just stick with the currently
177 dbus_error_init (&error);
178 if (! bus_context_reload_config (context, &error))
180 _DBUS_ASSERT_ERROR_IS_SET (&error);
181 _dbus_assert (dbus_error_has_name (&error, DBUS_ERROR_FAILED) ||
182 dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY));
183 _dbus_warn ("Unable to reload configuration: %s\n",
185 dbus_error_free (&error);
191 reload_watch_callback (DBusWatch *watch,
192 unsigned int condition,
195 return dbus_watch_handle (watch, condition);
199 setup_reload_pipe (DBusLoop *loop)
204 dbus_error_init (&error);
206 if (!_dbus_full_duplex_pipe (&reload_pipe[0], &reload_pipe[1],
209 _dbus_warn ("Unable to create reload pipe: %s\n",
211 dbus_error_free (&error);
215 watch = _dbus_watch_new (reload_pipe[RELOAD_READ_END],
216 DBUS_WATCH_READABLE, TRUE,
217 handle_reload_watch, NULL, NULL);
221 _dbus_warn ("Unable to create reload watch: %s\n",
223 dbus_error_free (&error);
227 if (!_dbus_loop_add_watch (loop, watch, reload_watch_callback,
230 _dbus_warn ("Unable to add reload watch to main loop: %s\n",
232 dbus_error_free (&error);
239 close_reload_pipe (void)
241 _dbus_close_socket (reload_pipe[RELOAD_READ_END], NULL);
242 reload_pipe[RELOAD_READ_END] = -1;
244 _dbus_close_socket (reload_pipe[RELOAD_WRITE_END], NULL);
245 reload_pipe[RELOAD_WRITE_END] = -1;
249 main (int argc, char **argv)
252 DBusString config_file;
255 const char *prev_arg;
256 DBusPipe print_addr_pipe;
257 DBusPipe print_pid_pipe;
259 dbus_bool_t print_address;
260 dbus_bool_t print_pid;
261 dbus_bool_t is_session_bus;
264 if (!_dbus_string_init (&config_file))
267 if (!_dbus_string_init (&addr_fd))
270 if (!_dbus_string_init (&pid_fd))
273 print_address = FALSE;
275 is_session_bus = FALSE;
276 force_fork = FORK_FOLLOW_CONFIG_FILE;
282 const char *arg = argv[i];
284 if (strcmp (arg, "--help") == 0 ||
285 strcmp (arg, "-h") == 0 ||
286 strcmp (arg, "-?") == 0)
288 else if (strcmp (arg, "--version") == 0)
290 else if (strcmp (arg, "--introspect") == 0)
292 else if (strcmp (arg, "--nofork") == 0)
293 force_fork = FORK_NEVER;
294 else if (strcmp (arg, "--fork") == 0)
295 force_fork = FORK_ALWAYS;
296 else if (strcmp (arg, "--system") == 0)
298 check_two_config_files (&config_file, "system");
300 if (!_dbus_append_system_config_file (&config_file))
303 else if (strcmp (arg, "--session") == 0)
305 check_two_config_files (&config_file, "session");
307 if (!_dbus_append_session_config_file (&config_file))
310 else if (strstr (arg, "--config-file=") == arg)
314 check_two_config_files (&config_file, "config-file");
316 file = strchr (arg, '=');
319 if (!_dbus_string_append (&config_file, file))
323 strcmp (prev_arg, "--config-file") == 0)
325 check_two_config_files (&config_file, "config-file");
327 if (!_dbus_string_append (&config_file, arg))
330 else if (strcmp (arg, "--config-file") == 0)
331 ; /* wait for next arg */
332 else if (strstr (arg, "--print-address=") == arg)
336 check_two_addr_descriptors (&addr_fd, "print-address");
338 desc = strchr (arg, '=');
341 if (!_dbus_string_append (&addr_fd, desc))
344 print_address = TRUE;
347 strcmp (prev_arg, "--print-address") == 0)
349 check_two_addr_descriptors (&addr_fd, "print-address");
351 if (!_dbus_string_append (&addr_fd, arg))
354 print_address = TRUE;
356 else if (strcmp (arg, "--print-address") == 0)
357 print_address = TRUE; /* and we'll get the next arg if appropriate */
358 else if (strstr (arg, "--print-pid=") == arg)
362 check_two_pid_descriptors (&pid_fd, "print-pid");
364 desc = strchr (arg, '=');
367 if (!_dbus_string_append (&pid_fd, desc))
373 strcmp (prev_arg, "--print-pid") == 0)
375 check_two_pid_descriptors (&pid_fd, "print-pid");
377 if (!_dbus_string_append (&pid_fd, arg))
382 else if (strcmp (arg, "--print-pid") == 0)
383 print_pid = TRUE; /* and we'll get the next arg if appropriate */
392 if (_dbus_string_get_length (&config_file) == 0)
394 fprintf (stderr, "No configuration file specified.\n");
398 _dbus_pipe_invalidate (&print_addr_pipe);
401 _dbus_pipe_init_stdout (&print_addr_pipe);
402 if (_dbus_string_get_length (&addr_fd) > 0)
406 if (!_dbus_string_parse_int (&addr_fd, 0, &val, &end) ||
407 end != _dbus_string_get_length (&addr_fd) ||
408 val < 0 || val > _DBUS_INT_MAX)
410 fprintf (stderr, "Invalid file descriptor: \"%s\"\n",
411 _dbus_string_get_const_data (&addr_fd));
415 _dbus_pipe_init (&print_addr_pipe, val);
418 _dbus_string_free (&addr_fd);
420 _dbus_pipe_invalidate (&print_pid_pipe);
423 _dbus_pipe_init_stdout (&print_pid_pipe);
424 if (_dbus_string_get_length (&pid_fd) > 0)
428 if (!_dbus_string_parse_int (&pid_fd, 0, &val, &end) ||
429 end != _dbus_string_get_length (&pid_fd) ||
430 val < 0 || val > _DBUS_INT_MAX)
432 fprintf (stderr, "Invalid file descriptor: \"%s\"\n",
433 _dbus_string_get_const_data (&pid_fd));
437 _dbus_pipe_init (&print_pid_pipe, val);
440 _dbus_string_free (&pid_fd);
442 if (!bus_selinux_pre_init ())
444 _dbus_warn ("SELinux pre-initialization failed\n");
448 dbus_error_init (&error);
449 context = bus_context_new (&config_file, force_fork,
450 &print_addr_pipe, &print_pid_pipe,
452 _dbus_string_free (&config_file);
455 _dbus_warn ("Failed to start message bus: %s\n",
457 dbus_error_free (&error);
461 is_session_bus = bus_context_get_type(context) != NULL
462 && strcmp(bus_context_get_type(context),"session") == 0;
465 _dbus_daemon_publish_session_bus_address (bus_context_get_address (context));
467 /* bus_context_new() closes the print_addr_pipe and
471 setup_reload_pipe (bus_context_get_loop (context));
474 _dbus_set_signal_handler (SIGHUP, 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 ();