1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 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 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <sys/epoll.h>
23 #include <sys/timerfd.h>
26 #include <dbus/dbus.h>
32 #include "dbus-unit.h"
34 #include "dbus-manager.h"
35 #include "dbus-service.h"
36 #include "dbus-socket.h"
37 #include "dbus-target.h"
38 #include "dbus-device.h"
39 #include "dbus-mount.h"
40 #include "dbus-automount.h"
41 #include "dbus-snapshot.h"
42 #include "dbus-swap.h"
43 #include "dbus-timer.h"
44 #include "dbus-path.h"
45 #include "bus-errors.h"
48 #define CONNECTIONS_MAX 52
50 static const char bus_properties_interface[] = BUS_PROPERTIES_INTERFACE;
51 static const char bus_introspectable_interface[] = BUS_INTROSPECTABLE_INTERFACE;
53 const char *const bus_interface_table[] = {
54 "org.freedesktop.DBus.Properties", bus_properties_interface,
55 "org.freedesktop.DBus.Introspectable", bus_introspectable_interface,
56 "org.freedesktop.systemd1.Manager", bus_manager_interface,
57 "org.freedesktop.systemd1.Job", bus_job_interface,
58 "org.freedesktop.systemd1.Unit", bus_unit_interface,
59 "org.freedesktop.systemd1.Service", bus_service_interface,
60 "org.freedesktop.systemd1.Socket", bus_socket_interface,
61 "org.freedesktop.systemd1.Target", bus_target_interface,
62 "org.freedesktop.systemd1.Device", bus_device_interface,
63 "org.freedesktop.systemd1.Mount", bus_mount_interface,
64 "org.freedesktop.systemd1.Automount", bus_automount_interface,
65 "org.freedesktop.systemd1.Snapshot", bus_snapshot_interface,
66 "org.freedesktop.systemd1.Swap", bus_swap_interface,
67 "org.freedesktop.systemd1.Timer", bus_timer_interface,
68 "org.freedesktop.systemd1.Path", bus_path_interface,
72 static const char *error_to_dbus(int error);
73 static void bus_done_api(Manager *m);
74 static void bus_done_system(Manager *m);
75 static void bus_done_private(Manager *m);
76 static void shutdown_connection(Manager *m, DBusConnection *c);
78 static void bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) {
84 /* We maintain two sets, one for those connections where we
85 * requested a dispatch, and another where we didn't. And then,
86 * we move the connections between the two sets. */
88 if (status == DBUS_DISPATCH_COMPLETE)
89 set_move_one(m->bus_connections, m->bus_connections_for_dispatch, bus);
91 set_move_one(m->bus_connections_for_dispatch, m->bus_connections, bus);
94 static uint32_t bus_flags_to_events(DBusWatch *bus_watch) {
100 /* no watch flags for disabled watches */
101 if (!dbus_watch_get_enabled(bus_watch))
104 flags = dbus_watch_get_flags(bus_watch);
106 if (flags & DBUS_WATCH_READABLE)
108 if (flags & DBUS_WATCH_WRITABLE)
111 return events | EPOLLHUP | EPOLLERR;
114 static unsigned events_to_bus_flags(uint32_t events) {
117 if (events & EPOLLIN)
118 flags |= DBUS_WATCH_READABLE;
119 if (events & EPOLLOUT)
120 flags |= DBUS_WATCH_WRITABLE;
121 if (events & EPOLLHUP)
122 flags |= DBUS_WATCH_HANGUP;
123 if (events & EPOLLERR)
124 flags |= DBUS_WATCH_ERROR;
129 void bus_watch_event(Manager *m, Watch *w, int events) {
133 /* This is called by the event loop whenever there is
134 * something happening on D-Bus' file handles. */
136 if (!dbus_watch_get_enabled(w->data.bus_watch))
139 dbus_watch_handle(w->data.bus_watch, events_to_bus_flags(events));
142 static dbus_bool_t bus_add_watch(DBusWatch *bus_watch, void *data) {
145 struct epoll_event ev;
150 if (!(w = new0(Watch, 1)))
153 w->fd = dbus_watch_get_unix_fd(bus_watch);
154 w->type = WATCH_DBUS_WATCH;
155 w->data.bus_watch = bus_watch;
158 ev.events = bus_flags_to_events(bus_watch);
161 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) {
163 if (errno != EEXIST) {
168 /* Hmm, bloody D-Bus creates multiple watches on the
169 * same fd. epoll() does not like that. As a dirty
170 * hack we simply dup() the fd and hence get a second
171 * one we can safely add to the epoll(). */
173 if ((w->fd = dup(w->fd)) < 0) {
178 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) {
180 close_nointr_nofail(w->fd);
184 w->fd_is_dupped = true;
187 dbus_watch_set_data(bus_watch, w, NULL);
192 static void bus_remove_watch(DBusWatch *bus_watch, void *data) {
199 if (!(w = dbus_watch_get_data(bus_watch)))
202 assert(w->type == WATCH_DBUS_WATCH);
203 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
206 close_nointr_nofail(w->fd);
211 static void bus_toggle_watch(DBusWatch *bus_watch, void *data) {
214 struct epoll_event ev;
219 assert_se(w = dbus_watch_get_data(bus_watch));
220 assert(w->type == WATCH_DBUS_WATCH);
223 ev.events = bus_flags_to_events(bus_watch);
226 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_MOD, w->fd, &ev) == 0);
229 static int bus_timeout_arm(Manager *m, Watch *w) {
230 struct itimerspec its;
237 if (dbus_timeout_get_enabled(w->data.bus_timeout)) {
238 timespec_store(&its.it_value, dbus_timeout_get_interval(w->data.bus_timeout) * USEC_PER_MSEC);
239 its.it_interval = its.it_interval;
242 if (timerfd_settime(w->fd, 0, &its, NULL) < 0)
248 void bus_timeout_event(Manager *m, Watch *w, int events) {
252 /* This is called by the event loop whenever there is
253 * something happening on D-Bus' file handles. */
255 if (!(dbus_timeout_get_enabled(w->data.bus_timeout)))
258 dbus_timeout_handle(w->data.bus_timeout);
261 static dbus_bool_t bus_add_timeout(DBusTimeout *timeout, void *data) {
264 struct epoll_event ev;
269 if (!(w = new0(Watch, 1)))
272 if (!(w->fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
275 w->type = WATCH_DBUS_TIMEOUT;
276 w->data.bus_timeout = timeout;
278 if (bus_timeout_arm(m, w) < 0)
285 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0)
288 dbus_timeout_set_data(timeout, w, NULL);
294 close_nointr_nofail(w->fd);
300 static void bus_remove_timeout(DBusTimeout *timeout, void *data) {
307 if (!(w = dbus_timeout_get_data(timeout)))
310 assert(w->type == WATCH_DBUS_TIMEOUT);
311 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
312 close_nointr_nofail(w->fd);
316 static void bus_toggle_timeout(DBusTimeout *timeout, void *data) {
324 assert_se(w = dbus_timeout_get_data(timeout));
325 assert(w->type == WATCH_DBUS_TIMEOUT);
327 if ((r = bus_timeout_arm(m, w)) < 0)
328 log_error("Failed to rearm timer: %s", strerror(-r));
331 static DBusHandlerResult api_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
334 DBusMessage *reply = NULL;
340 dbus_error_init(&error);
342 if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL ||
343 dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL)
344 log_debug("Got D-Bus request: %s.%s() on %s",
345 dbus_message_get_interface(message),
346 dbus_message_get_member(message),
347 dbus_message_get_path(message));
349 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
350 log_debug("API D-Bus connection terminated.");
353 } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) {
354 const char *name, *old_owner, *new_owner;
356 if (!dbus_message_get_args(message, &error,
357 DBUS_TYPE_STRING, &name,
358 DBUS_TYPE_STRING, &old_owner,
359 DBUS_TYPE_STRING, &new_owner,
361 log_error("Failed to parse NameOwnerChanged message: %s", error.message);
363 if (set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) name))
364 log_debug("Subscription client vanished: %s (left: %u)", name, set_size(BUS_CONNECTION_SUBSCRIBED(m, connection)));
366 if (old_owner[0] == 0)
369 if (new_owner[0] == 0)
372 manager_dispatch_bus_name_owner_changed(m, name, old_owner, new_owner);
374 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Activator", "ActivationRequest")) {
377 if (!dbus_message_get_args(message, &error,
378 DBUS_TYPE_STRING, &name,
380 log_error("Failed to parse ActivationRequest message: %s", error.message);
385 log_debug("Got D-Bus activation request for %s", name);
387 if (manager_unit_pending_inactive(m, SPECIAL_DBUS_SERVICE) ||
388 manager_unit_pending_inactive(m, SPECIAL_DBUS_SOCKET)) {
390 dbus_set_error(&error, BUS_ERROR_SHUTTING_DOWN, "Refusing activation, D-Bus is shutting down.");
392 r = manager_load_unit(m, name, NULL, &error, &u);
394 if (r >= 0 && u->meta.refuse_manual_start)
398 r = manager_add_job(m, JOB_START, u, JOB_REPLACE, true, &error, NULL);
402 const char *id, *text;
404 log_warning("D-Bus activation failed for %s: %s", name, strerror(-r));
406 if (!(reply = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure")))
409 id = error.name ? error.name : error_to_dbus(r);
410 text = bus_error(&error, r);
412 if (!dbus_message_set_destination(reply, DBUS_SERVICE_DBUS) ||
413 !dbus_message_append_args(reply,
414 DBUS_TYPE_STRING, &name,
415 DBUS_TYPE_STRING, &id,
416 DBUS_TYPE_STRING, &text,
421 /* On success we don't do anything, the service will be spwaned now */
425 dbus_error_free(&error);
428 if (!dbus_connection_send(connection, reply, NULL))
431 dbus_message_unref(reply);
434 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
438 dbus_message_unref(reply);
440 dbus_error_free(&error);
442 return DBUS_HANDLER_RESULT_NEED_MEMORY;
445 static DBusHandlerResult system_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
453 dbus_error_init(&error);
455 if (m->api_bus != m->system_bus &&
456 (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL ||
457 dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL))
458 log_debug("Got D-Bus request on system bus: %s.%s() on %s",
459 dbus_message_get_interface(message),
460 dbus_message_get_member(message),
461 dbus_message_get_path(message));
463 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
464 log_debug("System D-Bus connection terminated.");
467 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
470 if (!dbus_message_get_args(message, &error,
471 DBUS_TYPE_STRING, &cgroup,
473 log_error("Failed to parse Released message: %s", error.message);
475 cgroup_notify_empty(m, cgroup);
478 dbus_error_free(&error);
479 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
482 static DBusHandlerResult private_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
490 dbus_error_init(&error);
492 if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL ||
493 dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL)
494 log_debug("Got D-Bus request: %s.%s() on %s",
495 dbus_message_get_interface(message),
496 dbus_message_get_member(message),
497 dbus_message_get_path(message));
499 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected"))
500 shutdown_connection(m, connection);
501 else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
504 if (!dbus_message_get_args(message, &error,
505 DBUS_TYPE_STRING, &cgroup,
507 log_error("Failed to parse Released message: %s", error.message);
509 cgroup_notify_empty(m, cgroup);
512 dbus_error_free(&error);
514 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
517 unsigned bus_dispatch(Manager *m) {
522 if (m->queued_message) {
523 /* If we cannot get rid of this message we won't
524 * dispatch any D-Bus messages, so that we won't end
525 * up wanting to queue another message. */
527 if (m->queued_message_connection)
528 if (!dbus_connection_send(m->queued_message_connection, m->queued_message, NULL))
531 dbus_message_unref(m->queued_message);
532 m->queued_message = NULL;
533 m->queued_message_connection = NULL;
536 if ((c = set_first(m->bus_connections_for_dispatch))) {
537 if (dbus_connection_dispatch(c) == DBUS_DISPATCH_COMPLETE)
538 set_move_one(m->bus_connections, m->bus_connections_for_dispatch, c);
546 static void request_name_pending_cb(DBusPendingCall *pending, void *userdata) {
550 dbus_error_init(&error);
552 assert_se(reply = dbus_pending_call_steal_reply(pending));
554 switch (dbus_message_get_type(reply)) {
556 case DBUS_MESSAGE_TYPE_ERROR:
558 assert_se(dbus_set_error_from_message(&error, reply));
559 log_warning("RequestName() failed: %s", error.message);
562 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
565 if (!dbus_message_get_args(reply,
567 DBUS_TYPE_UINT32, &r,
568 DBUS_TYPE_INVALID)) {
569 log_error("Failed to parse RequestName() reply: %s", error.message);
574 log_debug("Successfully acquired name.");
576 log_error("Name already owned.");
582 assert_not_reached("Invalid reply message");
585 dbus_message_unref(reply);
586 dbus_error_free(&error);
589 static int request_name(Manager *m) {
590 const char *name = "org.freedesktop.systemd1";
592 DBusMessage *message = NULL;
593 DBusPendingCall *pending = NULL;
595 if (!(message = dbus_message_new_method_call(
602 if (!dbus_message_append_args(
604 DBUS_TYPE_STRING, &name,
605 DBUS_TYPE_UINT32, &flags,
609 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
612 if (!dbus_pending_call_set_notify(pending, request_name_pending_cb, m, NULL))
615 dbus_message_unref(message);
616 dbus_pending_call_unref(pending);
618 /* We simple ask for the name and don't wait for it. Sooner or
619 * later we'll have it. */
625 dbus_pending_call_cancel(pending);
626 dbus_pending_call_unref(pending);
630 dbus_message_unref(message);
635 static void query_name_list_pending_cb(DBusPendingCall *pending, void *userdata) {
638 Manager *m = userdata;
642 dbus_error_init(&error);
644 assert_se(reply = dbus_pending_call_steal_reply(pending));
646 switch (dbus_message_get_type(reply)) {
648 case DBUS_MESSAGE_TYPE_ERROR:
650 assert_se(dbus_set_error_from_message(&error, reply));
651 log_warning("ListNames() failed: %s", error.message);
654 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
658 if ((r = bus_parse_strv(reply, &l)) < 0)
659 log_warning("Failed to parse ListNames() reply: %s", strerror(-r));
664 /* This is a bit hacky, we say the
665 * owner of the name is the name
666 * itself, because we don't want the
667 * extra traffic to figure out the
669 manager_dispatch_bus_name_owner_changed(m, *t, NULL, *t);
678 assert_not_reached("Invalid reply message");
681 dbus_message_unref(reply);
682 dbus_error_free(&error);
685 static int query_name_list(Manager *m) {
686 DBusMessage *message = NULL;
687 DBusPendingCall *pending = NULL;
689 /* Asks for the currently installed bus names */
691 if (!(message = dbus_message_new_method_call(
698 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
701 if (!dbus_pending_call_set_notify(pending, query_name_list_pending_cb, m, NULL))
704 dbus_message_unref(message);
705 dbus_pending_call_unref(pending);
707 /* We simple ask for the list and don't wait for it. Sooner or
708 * later we'll get it. */
714 dbus_pending_call_cancel(pending);
715 dbus_pending_call_unref(pending);
719 dbus_message_unref(message);
724 static int bus_setup_loop(Manager *m, DBusConnection *bus) {
728 dbus_connection_set_exit_on_disconnect(bus, FALSE);
730 if (!dbus_connection_set_watch_functions(bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
731 !dbus_connection_set_timeout_functions(bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) {
732 log_error("Not enough memory");
736 if (set_put(m->bus_connections_for_dispatch, bus) < 0) {
737 log_error("Not enough memory");
741 dbus_connection_set_dispatch_status_function(bus, bus_dispatch_status, m, NULL);
745 static dbus_bool_t allow_only_root(DBusConnection *connection, unsigned long uid, void *data) {
749 static void bus_new_connection(
751 DBusConnection *new_connection,
758 if (set_size(m->bus_connections) >= CONNECTIONS_MAX) {
759 log_error("Too many concurrent connections.");
763 dbus_connection_set_unix_user_function(new_connection, allow_only_root, NULL, NULL);
765 if (bus_setup_loop(m, new_connection) < 0)
768 if (!dbus_connection_register_object_path(new_connection, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
769 !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
770 !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
771 !dbus_connection_add_filter(new_connection, private_bus_message_filter, m, NULL)) {
772 log_error("Not enough memory.");
776 log_debug("Accepted connection on private bus.");
778 dbus_connection_ref(new_connection);
781 static int bus_init_system(Manager *m) {
787 dbus_error_init(&error);
792 if (m->running_as == MANAGER_SYSTEM && m->api_bus)
793 m->system_bus = m->api_bus;
795 if (!(m->system_bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error))) {
796 log_debug("Failed to get system D-Bus connection, retrying later: %s", error.message);
801 if ((r = bus_setup_loop(m, m->system_bus)) < 0)
805 if (!dbus_connection_add_filter(m->system_bus, system_bus_message_filter, m, NULL)) {
806 log_error("Not enough memory");
811 dbus_bus_add_match(m->system_bus,
813 "interface='org.freedesktop.systemd1.Agent',"
815 "path='/org/freedesktop/systemd1/agent'",
818 if (dbus_error_is_set(&error)) {
819 log_error("Failed to register match: %s", error.message);
824 if (m->api_bus != m->system_bus) {
826 log_debug("Successfully connected to system D-Bus bus %s as %s",
827 strnull((id = dbus_connection_get_server_id(m->system_bus))),
828 strnull(dbus_bus_get_unique_name(m->system_bus)));
836 dbus_error_free(&error);
841 static int bus_init_api(Manager *m) {
847 dbus_error_init(&error);
852 if (m->running_as == MANAGER_SYSTEM && m->system_bus)
853 m->api_bus = m->system_bus;
855 if (!(m->api_bus = dbus_bus_get_private(m->running_as == MANAGER_SESSION ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error))) {
856 log_debug("Failed to get API D-Bus connection, retrying later: %s", error.message);
861 if ((r = bus_setup_loop(m, m->api_bus)) < 0)
865 if (!dbus_connection_register_object_path(m->api_bus, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
866 !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
867 !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
868 !dbus_connection_add_filter(m->api_bus, api_bus_message_filter, m, NULL)) {
869 log_error("Not enough memory");
874 /* Get NameOwnerChange messages */
875 dbus_bus_add_match(m->api_bus,
877 "sender='"DBUS_SERVICE_DBUS"',"
878 "interface='"DBUS_INTERFACE_DBUS"',"
879 "member='NameOwnerChanged',"
880 "path='"DBUS_PATH_DBUS"'",
883 if (dbus_error_is_set(&error)) {
884 log_error("Failed to register match: %s", error.message);
889 /* Get activation requests */
890 dbus_bus_add_match(m->api_bus,
892 "sender='"DBUS_SERVICE_DBUS"',"
893 "interface='org.freedesktop.systemd1.Activator',"
894 "member='ActivationRequest',"
895 "path='"DBUS_PATH_DBUS"'",
898 if (dbus_error_is_set(&error)) {
899 log_error("Failed to register match: %s", error.message);
904 if ((r = request_name(m)) < 0)
907 if ((r = query_name_list(m)) < 0)
910 if (m->api_bus != m->system_bus) {
912 log_debug("Successfully connected to API D-Bus bus %s as %s",
913 strnull((id = dbus_connection_get_server_id(m->api_bus))),
914 strnull(dbus_bus_get_unique_name(m->api_bus)));
922 dbus_error_free(&error);
927 static int bus_init_private(Manager *m) {
930 const char *const external_only[] = {
937 dbus_error_init(&error);
942 /* We want the private bus only when running as init */
946 if (!(m->private_bus = dbus_server_listen("unix:abstract=/org/freedesktop/systemd1/private", &error))) {
947 log_error("Failed to create private D-Bus server: %s", error.message);
952 if (!dbus_server_set_auth_mechanisms(m->private_bus, (const char**) external_only) ||
953 !dbus_server_set_watch_functions(m->private_bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
954 !dbus_server_set_timeout_functions(m->private_bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) {
955 log_error("Not enough memory");
960 dbus_server_set_new_connection_function(m->private_bus, bus_new_connection, m, NULL);
962 log_debug("Successfully created private D-Bus server.");
968 dbus_error_free(&error);
973 int bus_init(Manager *m) {
976 if (set_ensure_allocated(&m->bus_connections, trivial_hash_func, trivial_compare_func) < 0 ||
977 set_ensure_allocated(&m->bus_connections_for_dispatch, trivial_hash_func, trivial_compare_func) < 0) {
978 log_error("Not enough memory");
982 if (m->name_data_slot < 0)
983 if (!dbus_pending_call_allocate_data_slot(&m->name_data_slot)) {
984 log_error("Not enough memory");
988 if (m->subscribed_data_slot < 0)
989 if (!dbus_pending_call_allocate_data_slot(&m->subscribed_data_slot)) {
990 log_error("Not enough memory");
994 if ((r = bus_init_system(m)) < 0 ||
995 (r = bus_init_api(m)) < 0 ||
996 (r = bus_init_private(m)) < 0)
1002 static void shutdown_connection(Manager *m, DBusConnection *c) {
1007 HASHMAP_FOREACH(j, m->jobs, i)
1009 free(j->bus_client);
1010 j->bus_client = NULL;
1015 set_remove(m->bus_connections, c);
1016 set_remove(m->bus_connections_for_dispatch, c);
1018 if ((s = BUS_CONNECTION_SUBSCRIBED(m, c))) {
1021 while ((t = set_steal_first(s)))
1027 if (m->queued_message_connection == c) {
1028 m->queued_message_connection = NULL;
1030 if (m->queued_message) {
1031 dbus_message_unref(m->queued_message);
1032 m->queued_message = NULL;
1036 dbus_connection_set_dispatch_status_function(c, NULL, NULL, NULL);
1037 dbus_connection_flush(c);
1038 dbus_connection_close(c);
1039 dbus_connection_unref(c);
1042 static void bus_done_api(Manager *m) {
1046 if (m->system_bus == m->api_bus)
1047 m->system_bus = NULL;
1049 shutdown_connection(m, m->api_bus);
1054 if (m->queued_message) {
1055 dbus_message_unref(m->queued_message);
1056 m->queued_message = NULL;
1060 static void bus_done_system(Manager *m) {
1063 if (m->system_bus == m->api_bus)
1066 if (m->system_bus) {
1067 shutdown_connection(m, m->system_bus);
1068 m->system_bus = NULL;
1072 static void bus_done_private(Manager *m) {
1074 if (m->private_bus) {
1075 dbus_server_disconnect(m->private_bus);
1076 dbus_server_unref(m->private_bus);
1077 m->private_bus = NULL;
1081 void bus_done(Manager *m) {
1086 bus_done_private(m);
1088 while ((c = set_steal_first(m->bus_connections)))
1089 shutdown_connection(m, c);
1091 while ((c = set_steal_first(m->bus_connections_for_dispatch)))
1092 shutdown_connection(m, c);
1094 set_free(m->bus_connections);
1095 set_free(m->bus_connections_for_dispatch);
1097 if (m->name_data_slot >= 0)
1098 dbus_pending_call_free_data_slot(&m->name_data_slot);
1100 if (m->subscribed_data_slot >= 0)
1101 dbus_pending_call_free_data_slot(&m->subscribed_data_slot);
1104 static void query_pid_pending_cb(DBusPendingCall *pending, void *userdata) {
1105 Manager *m = userdata;
1110 dbus_error_init(&error);
1112 assert_se(name = BUS_PENDING_CALL_NAME(m, pending));
1113 assert_se(reply = dbus_pending_call_steal_reply(pending));
1115 switch (dbus_message_get_type(reply)) {
1117 case DBUS_MESSAGE_TYPE_ERROR:
1119 assert_se(dbus_set_error_from_message(&error, reply));
1120 log_warning("GetConnectionUnixProcessID() failed: %s", error.message);
1123 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
1126 if (!dbus_message_get_args(reply,
1128 DBUS_TYPE_UINT32, &r,
1129 DBUS_TYPE_INVALID)) {
1130 log_error("Failed to parse GetConnectionUnixProcessID() reply: %s", error.message);
1134 manager_dispatch_bus_query_pid_done(m, name, (pid_t) r);
1139 assert_not_reached("Invalid reply message");
1142 dbus_message_unref(reply);
1143 dbus_error_free(&error);
1146 int bus_query_pid(Manager *m, const char *name) {
1147 DBusMessage *message = NULL;
1148 DBusPendingCall *pending = NULL;
1154 if (!(message = dbus_message_new_method_call(
1157 DBUS_INTERFACE_DBUS,
1158 "GetConnectionUnixProcessID")))
1161 if (!(dbus_message_append_args(
1163 DBUS_TYPE_STRING, &name,
1164 DBUS_TYPE_INVALID)))
1167 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
1170 if (!(n = strdup(name)))
1173 if (!dbus_pending_call_set_data(pending, m->name_data_slot, n, free))
1178 if (!dbus_pending_call_set_notify(pending, query_pid_pending_cb, m, NULL))
1181 dbus_message_unref(message);
1182 dbus_pending_call_unref(pending);
1190 dbus_pending_call_cancel(pending);
1191 dbus_pending_call_unref(pending);
1195 dbus_message_unref(message);
1200 DBusHandlerResult bus_default_message_handler(Manager *m, DBusConnection *c, DBusMessage *message, const char*introspection, const BusProperty *properties) {
1202 DBusMessage *reply = NULL;
1208 dbus_error_init(&error);
1210 if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect") && introspection) {
1212 if (!(reply = dbus_message_new_method_return(message)))
1215 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID))
1218 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Get") && properties) {
1219 const char *interface, *property;
1220 const BusProperty *p;
1222 if (!dbus_message_get_args(
1225 DBUS_TYPE_STRING, &interface,
1226 DBUS_TYPE_STRING, &property,
1228 return bus_send_error_reply(m, c, message, &error, -EINVAL);
1230 for (p = properties; p->property; p++)
1231 if (streq(p->interface, interface) && streq(p->property, property))
1235 DBusMessageIter iter, sub;
1237 if (!(reply = dbus_message_new_method_return(message)))
1240 dbus_message_iter_init_append(reply, &iter);
1242 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, p->signature, &sub))
1245 if ((r = p->append(m, &sub, property, (void*) p->data)) < 0) {
1250 dbus_message_unref(reply);
1251 return bus_send_error_reply(m, c, message, NULL, r);
1254 if (!dbus_message_iter_close_container(&iter, &sub))
1258 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "GetAll") && properties) {
1259 const char *interface;
1260 const BusProperty *p;
1261 DBusMessageIter iter, sub, sub2, sub3;
1263 if (!dbus_message_get_args(
1266 DBUS_TYPE_STRING, &interface,
1268 return bus_send_error_reply(m, c, message, &error, -EINVAL);
1270 if (!(reply = dbus_message_new_method_return(message)))
1273 dbus_message_iter_init_append(reply, &iter);
1275 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub))
1278 for (p = properties; p->property; p++) {
1279 if (interface[0] && !streq(p->interface, interface))
1282 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, NULL, &sub2) ||
1283 !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &p->property) ||
1284 !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, p->signature, &sub3))
1287 if ((r = p->append(m, &sub3, p->property, (void*) p->data)) < 0) {
1292 dbus_message_unref(reply);
1293 return bus_send_error_reply(m, c, message, NULL, r);
1296 if (!dbus_message_iter_close_container(&sub2, &sub3) ||
1297 !dbus_message_iter_close_container(&sub, &sub2))
1301 if (!dbus_message_iter_close_container(&iter, &sub))
1306 if (!dbus_connection_send(c, reply, NULL))
1309 dbus_message_unref(reply);
1310 return DBUS_HANDLER_RESULT_HANDLED;
1313 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1317 dbus_message_unref(reply);
1319 dbus_error_free(&error);
1321 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1324 static const char *error_to_dbus(int error) {
1329 return DBUS_ERROR_INVALID_ARGS;
1332 return DBUS_ERROR_NO_MEMORY;
1336 return DBUS_ERROR_ACCESS_DENIED;
1339 return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN;
1342 return DBUS_ERROR_FILE_NOT_FOUND;
1345 return DBUS_ERROR_FILE_EXISTS;
1348 return DBUS_ERROR_TIMEOUT;
1351 return DBUS_ERROR_IO_ERROR;
1356 return DBUS_ERROR_DISCONNECTED;
1359 return DBUS_ERROR_FAILED;
1362 DBusHandlerResult bus_send_error_reply(Manager *m, DBusConnection *c, DBusMessage *message, DBusError *berror, int error) {
1363 DBusMessage *reply = NULL;
1364 const char *name, *text;
1366 if (berror && dbus_error_is_set(berror)) {
1367 name = berror->name;
1368 text = berror->message;
1370 name = error_to_dbus(error);
1371 text = strerror(-error);
1374 if (!(reply = dbus_message_new_error(message, name, text)))
1377 if (!dbus_connection_send(c, reply, NULL))
1380 dbus_message_unref(reply);
1383 dbus_error_free(berror);
1385 return DBUS_HANDLER_RESULT_HANDLED;
1389 dbus_message_unref(reply);
1392 dbus_error_free(berror);
1394 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1397 int bus_broadcast(Manager *m, DBusMessage *message) {
1405 SET_FOREACH(c, m->bus_connections_for_dispatch, i)
1406 if (c != m->system_bus || m->running_as == MANAGER_SYSTEM)
1407 oom = !dbus_connection_send(c, message, NULL);
1409 SET_FOREACH(c, m->bus_connections, i)
1410 if (c != m->system_bus || m->running_as == MANAGER_SYSTEM)
1411 oom = !dbus_connection_send(c, message, NULL);
1413 return oom ? -ENOMEM : 0;
1416 int bus_property_append_string(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1417 const char *t = data;
1426 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
1432 int bus_property_append_strv(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1433 DBusMessageIter sub;
1440 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
1444 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, t))
1447 if (!dbus_message_iter_close_container(i, &sub))
1453 int bus_property_append_bool(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1464 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db))
1470 int bus_property_append_uint64(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1476 /* Let's ensure that pid_t is actually 64bit, and hence this
1477 * function can be used for usec_t */
1478 assert_cc(sizeof(uint64_t) == sizeof(usec_t));
1480 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, data))
1486 int bus_property_append_uint32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1492 /* Let's ensure that pid_t and mode_t is actually 32bit, and
1493 * hence this function can be used for pid_t/mode_t */
1494 assert_cc(sizeof(uint32_t) == sizeof(pid_t));
1495 assert_cc(sizeof(uint32_t) == sizeof(mode_t));
1496 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
1498 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data))
1504 int bus_property_append_int32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1510 assert_cc(sizeof(int32_t) == sizeof(int));
1512 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, data))
1518 int bus_property_append_size(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1526 u = (uint64_t) *(size_t*) data;
1528 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
1534 int bus_property_append_ul(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1542 u = (uint64_t) *(unsigned long*) data;
1544 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
1550 int bus_parse_strv(DBusMessage *m, char ***_l) {
1551 DBusMessageIter iter, sub;
1552 unsigned n = 0, i = 0;
1558 if (!dbus_message_iter_init(m, &iter) ||
1559 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
1560 dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
1563 dbus_message_iter_recurse(&iter, &sub);
1565 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1567 dbus_message_iter_next(&sub);
1570 if (!(l = new(char*, n+1)))
1573 assert_se(dbus_message_iter_init(m, &iter));
1574 dbus_message_iter_recurse(&iter, &sub);
1576 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1579 assert_se(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
1580 dbus_message_iter_get_basic(&sub, &s);
1582 if (!(l[i++] = strdup(s))) {
1587 dbus_message_iter_next(&sub);
1599 bool bus_has_subscriber(Manager *m) {
1605 SET_FOREACH(c, m->bus_connections_for_dispatch, i)
1606 if (bus_connection_has_subscriber(m, c))
1609 SET_FOREACH(c, m->bus_connections, i)
1610 if (bus_connection_has_subscriber(m, c))
1616 bool bus_connection_has_subscriber(Manager *m, DBusConnection *c) {
1620 return !set_isempty(BUS_CONNECTION_SUBSCRIBED(m, c));
1623 DBusMessage* bus_properties_changed_new(const char *path, const char *interface, const char *properties) {
1625 DBusMessageIter iter, sub;
1631 if (!(m = dbus_message_new_signal(path, "org.freedesktop.DBus.Properties", "PropertiesChanged")))
1634 dbus_message_iter_init_append(m, &iter);
1636 /* We won't send any property values, since they might be
1637 * large and sometimes not cheap to generated */
1639 if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &interface) ||
1640 !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub) ||
1641 !dbus_message_iter_close_container(&iter, &sub) ||
1642 !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub))
1645 NULSTR_FOREACH(i, properties)
1646 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &i))
1649 if (!dbus_message_iter_close_container(&iter, &sub))
1656 dbus_message_unref(m);