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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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, 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,
159 _dbus_string_init (&str);
160 if ((reload_pipe[RELOAD_READ_END] > 0) &&
161 _dbus_read_socket (reload_pipe[RELOAD_READ_END], &str, 1) != 1)
163 _dbus_warn ("Couldn't read from reload pipe.\n");
164 close_reload_pipe ();
167 _dbus_string_free (&str);
169 /* this can only fail if we don't understand the config file
170 * or OOM. Either way we should just stick with the currently
173 dbus_error_init (&error);
174 if (! bus_context_reload_config (context, &error))
176 _DBUS_ASSERT_ERROR_IS_SET (&error);
177 _dbus_assert (dbus_error_has_name (&error, DBUS_ERROR_FAILED) ||
178 dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY));
179 _dbus_warn ("Unable to reload configuration: %s\n",
181 dbus_error_free (&error);
187 reload_watch_callback (DBusWatch *watch,
188 unsigned int condition,
191 return dbus_watch_handle (watch, condition);
195 setup_reload_pipe (DBusLoop *loop)
200 dbus_error_init (&error);
202 if (!_dbus_full_duplex_pipe (&reload_pipe[0], &reload_pipe[1],
205 _dbus_warn ("Unable to create reload pipe: %s\n",
207 dbus_error_free (&error);
211 _dbus_fd_set_close_on_exec (reload_pipe[0]);
212 _dbus_fd_set_close_on_exec (reload_pipe[1]);
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;
262 if (!_dbus_string_init (&config_file))
265 if (!_dbus_string_init (&addr_fd))
268 if (!_dbus_string_init (&pid_fd))
271 print_address = FALSE;
273 force_fork = FORK_FOLLOW_CONFIG_FILE;
279 const char *arg = argv[i];
281 if (strcmp (arg, "--help") == 0 ||
282 strcmp (arg, "-h") == 0 ||
283 strcmp (arg, "-?") == 0)
285 else if (strcmp (arg, "--version") == 0)
287 else if (strcmp (arg, "--introspect") == 0)
289 else if (strcmp (arg, "--nofork") == 0)
290 force_fork = FORK_NEVER;
291 else if (strcmp (arg, "--fork") == 0)
292 force_fork = FORK_ALWAYS;
293 else if (strcmp (arg, "--system") == 0)
295 check_two_config_files (&config_file, "system");
297 if (!_dbus_append_system_config_file (&config_file))
300 else if (strcmp (arg, "--session") == 0)
302 check_two_config_files (&config_file, "session");
304 if (!_dbus_append_session_config_file (&config_file))
307 else if (strstr (arg, "--config-file=") == arg)
311 check_two_config_files (&config_file, "config-file");
313 file = strchr (arg, '=');
316 if (!_dbus_string_append (&config_file, file))
320 strcmp (prev_arg, "--config-file") == 0)
322 check_two_config_files (&config_file, "config-file");
324 if (!_dbus_string_append (&config_file, arg))
327 else if (strcmp (arg, "--config-file") == 0)
328 ; /* wait for next arg */
329 else if (strstr (arg, "--print-address=") == arg)
333 check_two_addr_descriptors (&addr_fd, "print-address");
335 desc = strchr (arg, '=');
338 if (!_dbus_string_append (&addr_fd, desc))
341 print_address = TRUE;
344 strcmp (prev_arg, "--print-address") == 0)
346 check_two_addr_descriptors (&addr_fd, "print-address");
348 if (!_dbus_string_append (&addr_fd, arg))
351 print_address = TRUE;
353 else if (strcmp (arg, "--print-address") == 0)
354 print_address = TRUE; /* and we'll get the next arg if appropriate */
355 else if (strstr (arg, "--print-pid=") == arg)
359 check_two_pid_descriptors (&pid_fd, "print-pid");
361 desc = strchr (arg, '=');
364 if (!_dbus_string_append (&pid_fd, desc))
370 strcmp (prev_arg, "--print-pid") == 0)
372 check_two_pid_descriptors (&pid_fd, "print-pid");
374 if (!_dbus_string_append (&pid_fd, arg))
379 else if (strcmp (arg, "--print-pid") == 0)
380 print_pid = TRUE; /* and we'll get the next arg if appropriate */
389 if (_dbus_string_get_length (&config_file) == 0)
391 fprintf (stderr, "No configuration file specified.\n");
395 _dbus_pipe_invalidate (&print_addr_pipe);
398 _dbus_pipe_init_stdout (&print_addr_pipe);
399 if (_dbus_string_get_length (&addr_fd) > 0)
403 if (!_dbus_string_parse_int (&addr_fd, 0, &val, &end) ||
404 end != _dbus_string_get_length (&addr_fd) ||
405 val < 0 || val > _DBUS_INT_MAX)
407 fprintf (stderr, "Invalid file descriptor: \"%s\"\n",
408 _dbus_string_get_const_data (&addr_fd));
412 _dbus_pipe_init (&print_addr_pipe, val);
415 _dbus_string_free (&addr_fd);
417 _dbus_pipe_invalidate (&print_pid_pipe);
420 _dbus_pipe_init_stdout (&print_pid_pipe);
421 if (_dbus_string_get_length (&pid_fd) > 0)
425 if (!_dbus_string_parse_int (&pid_fd, 0, &val, &end) ||
426 end != _dbus_string_get_length (&pid_fd) ||
427 val < 0 || val > _DBUS_INT_MAX)
429 fprintf (stderr, "Invalid file descriptor: \"%s\"\n",
430 _dbus_string_get_const_data (&pid_fd));
434 _dbus_pipe_init (&print_pid_pipe, val);
437 _dbus_string_free (&pid_fd);
439 if (!bus_selinux_pre_init ())
441 _dbus_warn ("SELinux pre-initialization failed\n");
445 dbus_error_init (&error);
446 context = bus_context_new (&config_file, force_fork,
447 &print_addr_pipe, &print_pid_pipe,
449 _dbus_string_free (&config_file);
452 _dbus_warn ("Failed to start message bus: %s\n",
454 dbus_error_free (&error);
458 /* bus_context_new() closes the print_addr_pipe and
462 setup_reload_pipe (bus_context_get_loop (context));
465 _dbus_set_signal_handler (SIGHUP, signal_handler);
467 _dbus_set_signal_handler (SIGTERM, signal_handler);
468 #ifdef DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX
469 _dbus_set_signal_handler (SIGIO, signal_handler);
470 #endif /* DBUS_BUS_ENABLE_DNOTIFY_ON_LINUX */
472 _dbus_verbose ("We are on D-Bus...\n");
473 _dbus_loop_run (bus_context_get_loop (context));
475 bus_context_shutdown (context);
476 bus_context_unref (context);
477 bus_selinux_shutdown ();