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"
47 #define CONNECTIONS_MAX 52
49 static const char bus_properties_interface[] = BUS_PROPERTIES_INTERFACE;
50 static const char bus_introspectable_interface[] = BUS_INTROSPECTABLE_INTERFACE;
52 const char *const bus_interface_table[] = {
53 "org.freedesktop.DBus.Properties", bus_properties_interface,
54 "org.freedesktop.DBus.Introspectable", bus_introspectable_interface,
55 "org.freedesktop.systemd1.Manager", bus_manager_interface,
56 "org.freedesktop.systemd1.Job", bus_job_interface,
57 "org.freedesktop.systemd1.Unit", bus_unit_interface,
58 "org.freedesktop.systemd1.Service", bus_service_interface,
59 "org.freedesktop.systemd1.Socket", bus_socket_interface,
60 "org.freedesktop.systemd1.Target", bus_target_interface,
61 "org.freedesktop.systemd1.Device", bus_device_interface,
62 "org.freedesktop.systemd1.Mount", bus_mount_interface,
63 "org.freedesktop.systemd1.Automount", bus_automount_interface,
64 "org.freedesktop.systemd1.Snapshot", bus_snapshot_interface,
65 "org.freedesktop.systemd1.Swap", bus_swap_interface,
66 "org.freedesktop.systemd1.Timer", bus_timer_interface,
67 "org.freedesktop.systemd1.Path", bus_path_interface,
71 static const char *error_to_dbus(int error);
72 static void bus_done_api(Manager *m);
73 static void bus_done_system(Manager *m);
74 static void bus_done_private(Manager *m);
75 static void shutdown_connection(Manager *m, DBusConnection *c);
77 static void bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) {
83 /* We maintain two sets, one for those connections where we
84 * requested a dispatch, and another where we didn't. And then,
85 * we move the connections between the two sets. */
87 if (status == DBUS_DISPATCH_COMPLETE)
88 set_move_one(m->bus_connections, m->bus_connections_for_dispatch, bus);
90 set_move_one(m->bus_connections_for_dispatch, m->bus_connections, bus);
93 static uint32_t bus_flags_to_events(DBusWatch *bus_watch) {
99 /* no watch flags for disabled watches */
100 if (!dbus_watch_get_enabled(bus_watch))
103 flags = dbus_watch_get_flags(bus_watch);
105 if (flags & DBUS_WATCH_READABLE)
107 if (flags & DBUS_WATCH_WRITABLE)
110 return events | EPOLLHUP | EPOLLERR;
113 static unsigned events_to_bus_flags(uint32_t events) {
116 if (events & EPOLLIN)
117 flags |= DBUS_WATCH_READABLE;
118 if (events & EPOLLOUT)
119 flags |= DBUS_WATCH_WRITABLE;
120 if (events & EPOLLHUP)
121 flags |= DBUS_WATCH_HANGUP;
122 if (events & EPOLLERR)
123 flags |= DBUS_WATCH_ERROR;
128 void bus_watch_event(Manager *m, Watch *w, int events) {
132 /* This is called by the event loop whenever there is
133 * something happening on D-Bus' file handles. */
135 if (!dbus_watch_get_enabled(w->data.bus_watch))
138 dbus_watch_handle(w->data.bus_watch, events_to_bus_flags(events));
141 static dbus_bool_t bus_add_watch(DBusWatch *bus_watch, void *data) {
144 struct epoll_event ev;
149 if (!(w = new0(Watch, 1)))
152 w->fd = dbus_watch_get_unix_fd(bus_watch);
153 w->type = WATCH_DBUS_WATCH;
154 w->data.bus_watch = bus_watch;
157 ev.events = bus_flags_to_events(bus_watch);
160 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) {
162 if (errno != EEXIST) {
167 /* Hmm, bloody D-Bus creates multiple watches on the
168 * same fd. epoll() does not like that. As a dirty
169 * hack we simply dup() the fd and hence get a second
170 * one we can safely add to the epoll(). */
172 if ((w->fd = dup(w->fd)) < 0) {
177 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) {
179 close_nointr_nofail(w->fd);
183 w->fd_is_dupped = true;
186 dbus_watch_set_data(bus_watch, w, NULL);
191 static void bus_remove_watch(DBusWatch *bus_watch, void *data) {
198 if (!(w = dbus_watch_get_data(bus_watch)))
201 assert(w->type == WATCH_DBUS_WATCH);
202 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
205 close_nointr_nofail(w->fd);
210 static void bus_toggle_watch(DBusWatch *bus_watch, void *data) {
213 struct epoll_event ev;
218 assert_se(w = dbus_watch_get_data(bus_watch));
219 assert(w->type == WATCH_DBUS_WATCH);
222 ev.events = bus_flags_to_events(bus_watch);
225 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_MOD, w->fd, &ev) == 0);
228 static int bus_timeout_arm(Manager *m, Watch *w) {
229 struct itimerspec its;
236 if (dbus_timeout_get_enabled(w->data.bus_timeout)) {
237 timespec_store(&its.it_value, dbus_timeout_get_interval(w->data.bus_timeout) * USEC_PER_MSEC);
238 its.it_interval = its.it_interval;
241 if (timerfd_settime(w->fd, 0, &its, NULL) < 0)
247 void bus_timeout_event(Manager *m, Watch *w, int events) {
251 /* This is called by the event loop whenever there is
252 * something happening on D-Bus' file handles. */
254 if (!(dbus_timeout_get_enabled(w->data.bus_timeout)))
257 dbus_timeout_handle(w->data.bus_timeout);
260 static dbus_bool_t bus_add_timeout(DBusTimeout *timeout, void *data) {
263 struct epoll_event ev;
268 if (!(w = new0(Watch, 1)))
271 if (!(w->fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
274 w->type = WATCH_DBUS_TIMEOUT;
275 w->data.bus_timeout = timeout;
277 if (bus_timeout_arm(m, w) < 0)
284 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0)
287 dbus_timeout_set_data(timeout, w, NULL);
293 close_nointr_nofail(w->fd);
299 static void bus_remove_timeout(DBusTimeout *timeout, void *data) {
306 if (!(w = dbus_timeout_get_data(timeout)))
309 assert(w->type == WATCH_DBUS_TIMEOUT);
310 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
311 close_nointr_nofail(w->fd);
315 static void bus_toggle_timeout(DBusTimeout *timeout, void *data) {
323 assert_se(w = dbus_timeout_get_data(timeout));
324 assert(w->type == WATCH_DBUS_TIMEOUT);
326 if ((r = bus_timeout_arm(m, w)) < 0)
327 log_error("Failed to rearm timer: %s", strerror(-r));
330 static DBusHandlerResult api_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
333 DBusMessage *reply = NULL;
339 dbus_error_init(&error);
341 if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL ||
342 dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL)
343 log_debug("Got D-Bus request: %s.%s() on %s",
344 dbus_message_get_interface(message),
345 dbus_message_get_member(message),
346 dbus_message_get_path(message));
348 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
349 log_debug("API D-Bus connection terminated.");
352 } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) {
353 const char *name, *old_owner, *new_owner;
355 if (!dbus_message_get_args(message, &error,
356 DBUS_TYPE_STRING, &name,
357 DBUS_TYPE_STRING, &old_owner,
358 DBUS_TYPE_STRING, &new_owner,
360 log_error("Failed to parse NameOwnerChanged message: %s", error.message);
362 if (set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) name))
363 log_debug("Subscription client vanished: %s (left: %u)", name, set_size(BUS_CONNECTION_SUBSCRIBED(m, connection)));
365 if (old_owner[0] == 0)
368 if (new_owner[0] == 0)
371 manager_dispatch_bus_name_owner_changed(m, name, old_owner, new_owner);
373 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Activator", "ActivationRequest")) {
376 if (!dbus_message_get_args(message, &error,
377 DBUS_TYPE_STRING, &name,
379 log_error("Failed to parse ActivationRequest message: %s", error.message);
384 log_debug("Got D-Bus activation request for %s", name);
386 r = manager_load_unit(m, name, NULL, &error, &u);
388 if (r >= 0 && u->meta.refuse_manual_start)
392 r = manager_add_job(m, JOB_START, u, JOB_REPLACE, true, &error, NULL);
395 const char *id, *text;
397 log_warning("D-Bus activation failed for %s: %s", name, strerror(-r));
399 if (!(reply = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure")))
402 id = error.name ? error.name : error_to_dbus(r);
403 text = bus_error(&error, r);
405 if (!dbus_message_set_destination(reply, DBUS_SERVICE_DBUS) ||
406 !dbus_message_append_args(reply,
407 DBUS_TYPE_STRING, &name,
408 DBUS_TYPE_STRING, &id,
409 DBUS_TYPE_STRING, &text,
414 /* On success we don't do anything, the service will be spwaned now */
418 dbus_error_free(&error);
421 if (!dbus_connection_send(connection, reply, NULL))
424 dbus_message_unref(reply);
427 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
431 dbus_message_unref(reply);
433 dbus_error_free(&error);
435 return DBUS_HANDLER_RESULT_NEED_MEMORY;
438 static DBusHandlerResult system_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
446 dbus_error_init(&error);
448 if (m->api_bus != m->system_bus &&
449 (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL ||
450 dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL))
451 log_debug("Got D-Bus request on system bus: %s.%s() on %s",
452 dbus_message_get_interface(message),
453 dbus_message_get_member(message),
454 dbus_message_get_path(message));
456 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
457 log_debug("System D-Bus connection terminated.");
460 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
463 if (!dbus_message_get_args(message, &error,
464 DBUS_TYPE_STRING, &cgroup,
466 log_error("Failed to parse Released message: %s", error.message);
468 cgroup_notify_empty(m, cgroup);
471 dbus_error_free(&error);
472 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
475 static DBusHandlerResult private_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
483 dbus_error_init(&error);
485 if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL ||
486 dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL)
487 log_debug("Got D-Bus request: %s.%s() on %s",
488 dbus_message_get_interface(message),
489 dbus_message_get_member(message),
490 dbus_message_get_path(message));
492 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected"))
493 shutdown_connection(m, connection);
494 else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
497 if (!dbus_message_get_args(message, &error,
498 DBUS_TYPE_STRING, &cgroup,
500 log_error("Failed to parse Released message: %s", error.message);
502 cgroup_notify_empty(m, cgroup);
505 dbus_error_free(&error);
507 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
510 unsigned bus_dispatch(Manager *m) {
515 if (m->queued_message) {
516 /* If we cannot get rid of this message we won't
517 * dispatch any D-Bus messages, so that we won't end
518 * up wanting to queue another message. */
520 if (m->queued_message_connection)
521 if (!dbus_connection_send(m->queued_message_connection, m->queued_message, NULL))
524 dbus_message_unref(m->queued_message);
525 m->queued_message = NULL;
526 m->queued_message_connection = NULL;
529 if ((c = set_first(m->bus_connections_for_dispatch))) {
530 if (dbus_connection_dispatch(c) == DBUS_DISPATCH_COMPLETE)
531 set_move_one(m->bus_connections, m->bus_connections_for_dispatch, c);
539 static void request_name_pending_cb(DBusPendingCall *pending, void *userdata) {
543 dbus_error_init(&error);
545 assert_se(reply = dbus_pending_call_steal_reply(pending));
547 switch (dbus_message_get_type(reply)) {
549 case DBUS_MESSAGE_TYPE_ERROR:
551 assert_se(dbus_set_error_from_message(&error, reply));
552 log_warning("RequestName() failed: %s", error.message);
555 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
558 if (!dbus_message_get_args(reply,
560 DBUS_TYPE_UINT32, &r,
561 DBUS_TYPE_INVALID)) {
562 log_error("Failed to parse RequestName() reply: %s", error.message);
567 log_debug("Successfully acquired name.");
569 log_error("Name already owned.");
575 assert_not_reached("Invalid reply message");
578 dbus_message_unref(reply);
579 dbus_error_free(&error);
582 static int request_name(Manager *m) {
583 const char *name = "org.freedesktop.systemd1";
585 DBusMessage *message = NULL;
586 DBusPendingCall *pending = NULL;
588 if (!(message = dbus_message_new_method_call(
595 if (!dbus_message_append_args(
597 DBUS_TYPE_STRING, &name,
598 DBUS_TYPE_UINT32, &flags,
602 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
605 if (!dbus_pending_call_set_notify(pending, request_name_pending_cb, m, NULL))
608 dbus_message_unref(message);
609 dbus_pending_call_unref(pending);
611 /* We simple ask for the name and don't wait for it. Sooner or
612 * later we'll have it. */
618 dbus_pending_call_cancel(pending);
619 dbus_pending_call_unref(pending);
623 dbus_message_unref(message);
628 static void query_name_list_pending_cb(DBusPendingCall *pending, void *userdata) {
631 Manager *m = userdata;
635 dbus_error_init(&error);
637 assert_se(reply = dbus_pending_call_steal_reply(pending));
639 switch (dbus_message_get_type(reply)) {
641 case DBUS_MESSAGE_TYPE_ERROR:
643 assert_se(dbus_set_error_from_message(&error, reply));
644 log_warning("ListNames() failed: %s", error.message);
647 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
651 if ((r = bus_parse_strv(reply, &l)) < 0)
652 log_warning("Failed to parse ListNames() reply: %s", strerror(-r));
657 /* This is a bit hacky, we say the
658 * owner of the name is the name
659 * itself, because we don't want the
660 * extra traffic to figure out the
662 manager_dispatch_bus_name_owner_changed(m, *t, NULL, *t);
671 assert_not_reached("Invalid reply message");
674 dbus_message_unref(reply);
675 dbus_error_free(&error);
678 static int query_name_list(Manager *m) {
679 DBusMessage *message = NULL;
680 DBusPendingCall *pending = NULL;
682 /* Asks for the currently installed bus names */
684 if (!(message = dbus_message_new_method_call(
691 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
694 if (!dbus_pending_call_set_notify(pending, query_name_list_pending_cb, m, NULL))
697 dbus_message_unref(message);
698 dbus_pending_call_unref(pending);
700 /* We simple ask for the list and don't wait for it. Sooner or
701 * later we'll get it. */
707 dbus_pending_call_cancel(pending);
708 dbus_pending_call_unref(pending);
712 dbus_message_unref(message);
717 static int bus_setup_loop(Manager *m, DBusConnection *bus) {
721 dbus_connection_set_exit_on_disconnect(bus, FALSE);
723 if (!dbus_connection_set_watch_functions(bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
724 !dbus_connection_set_timeout_functions(bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) {
725 log_error("Not enough memory");
729 if (set_put(m->bus_connections_for_dispatch, bus) < 0) {
730 log_error("Not enough memory");
734 dbus_connection_set_dispatch_status_function(bus, bus_dispatch_status, m, NULL);
738 static dbus_bool_t allow_only_root(DBusConnection *connection, unsigned long uid, void *data) {
742 static void bus_new_connection(
744 DBusConnection *new_connection,
751 if (set_size(m->bus_connections) >= CONNECTIONS_MAX) {
752 log_error("Too many concurrent connections.");
756 dbus_connection_set_unix_user_function(new_connection, allow_only_root, NULL, NULL);
758 if (bus_setup_loop(m, new_connection) < 0)
761 if (!dbus_connection_register_object_path(new_connection, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
762 !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
763 !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
764 !dbus_connection_add_filter(new_connection, private_bus_message_filter, m, NULL)) {
765 log_error("Not enough memory.");
769 log_debug("Accepted connection on private bus.");
771 dbus_connection_ref(new_connection);
774 static int bus_init_system(Manager *m) {
780 dbus_error_init(&error);
785 if (m->running_as == MANAGER_SYSTEM && m->api_bus)
786 m->system_bus = m->api_bus;
788 if (!(m->system_bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error))) {
789 log_debug("Failed to get system D-Bus connection, retrying later: %s", error.message);
794 if ((r = bus_setup_loop(m, m->system_bus)) < 0)
798 if (!dbus_connection_add_filter(m->system_bus, system_bus_message_filter, m, NULL)) {
799 log_error("Not enough memory");
804 dbus_bus_add_match(m->system_bus,
806 "interface='org.freedesktop.systemd1.Agent',"
808 "path='/org/freedesktop/systemd1/agent'",
811 if (dbus_error_is_set(&error)) {
812 log_error("Failed to register match: %s", error.message);
817 if (m->api_bus != m->system_bus) {
819 log_debug("Successfully connected to system D-Bus bus %s as %s",
820 strnull((id = dbus_connection_get_server_id(m->system_bus))),
821 strnull(dbus_bus_get_unique_name(m->system_bus)));
829 dbus_error_free(&error);
834 static int bus_init_api(Manager *m) {
840 dbus_error_init(&error);
845 if (m->running_as == MANAGER_SYSTEM && m->system_bus)
846 m->api_bus = m->system_bus;
848 if (!(m->api_bus = dbus_bus_get_private(m->running_as == MANAGER_SESSION ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error))) {
849 log_debug("Failed to get API D-Bus connection, retrying later: %s", error.message);
854 if ((r = bus_setup_loop(m, m->api_bus)) < 0)
858 if (!dbus_connection_register_object_path(m->api_bus, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
859 !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
860 !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
861 !dbus_connection_add_filter(m->api_bus, api_bus_message_filter, m, NULL)) {
862 log_error("Not enough memory");
867 /* Get NameOwnerChange messages */
868 dbus_bus_add_match(m->api_bus,
870 "sender='"DBUS_SERVICE_DBUS"',"
871 "interface='"DBUS_INTERFACE_DBUS"',"
872 "member='NameOwnerChanged',"
873 "path='"DBUS_PATH_DBUS"'",
876 if (dbus_error_is_set(&error)) {
877 log_error("Failed to register match: %s", error.message);
882 /* Get activation requests */
883 dbus_bus_add_match(m->api_bus,
885 "sender='"DBUS_SERVICE_DBUS"',"
886 "interface='org.freedesktop.systemd1.Activator',"
887 "member='ActivationRequest',"
888 "path='"DBUS_PATH_DBUS"'",
891 if (dbus_error_is_set(&error)) {
892 log_error("Failed to register match: %s", error.message);
897 if ((r = request_name(m)) < 0)
900 if ((r = query_name_list(m)) < 0)
903 if (m->api_bus != m->system_bus) {
905 log_debug("Successfully connected to API D-Bus bus %s as %s",
906 strnull((id = dbus_connection_get_server_id(m->api_bus))),
907 strnull(dbus_bus_get_unique_name(m->api_bus)));
915 dbus_error_free(&error);
920 static int bus_init_private(Manager *m) {
923 const char *const external_only[] = {
930 dbus_error_init(&error);
935 /* We want the private bus only when running as init */
939 if (!(m->private_bus = dbus_server_listen("unix:abstract=/org/freedesktop/systemd1/private", &error))) {
940 log_error("Failed to create private D-Bus server: %s", error.message);
945 if (!dbus_server_set_auth_mechanisms(m->private_bus, (const char**) external_only) ||
946 !dbus_server_set_watch_functions(m->private_bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
947 !dbus_server_set_timeout_functions(m->private_bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) {
948 log_error("Not enough memory");
953 dbus_server_set_new_connection_function(m->private_bus, bus_new_connection, m, NULL);
955 log_debug("Successfully created private D-Bus server.");
961 dbus_error_free(&error);
966 int bus_init(Manager *m) {
969 if (set_ensure_allocated(&m->bus_connections, trivial_hash_func, trivial_compare_func) < 0 ||
970 set_ensure_allocated(&m->bus_connections_for_dispatch, trivial_hash_func, trivial_compare_func) < 0) {
971 log_error("Not enough memory");
975 if (m->name_data_slot < 0)
976 if (!dbus_pending_call_allocate_data_slot(&m->name_data_slot)) {
977 log_error("Not enough memory");
981 if (m->subscribed_data_slot < 0)
982 if (!dbus_pending_call_allocate_data_slot(&m->subscribed_data_slot)) {
983 log_error("Not enough memory");
987 if ((r = bus_init_system(m)) < 0 ||
988 (r = bus_init_api(m)) < 0 ||
989 (r = bus_init_private(m)) < 0)
995 static void shutdown_connection(Manager *m, DBusConnection *c) {
1000 HASHMAP_FOREACH(j, m->jobs, i)
1002 free(j->bus_client);
1003 j->bus_client = NULL;
1008 set_remove(m->bus_connections, c);
1009 set_remove(m->bus_connections_for_dispatch, c);
1011 if ((s = BUS_CONNECTION_SUBSCRIBED(m, c))) {
1014 while ((t = set_steal_first(s)))
1020 if (m->queued_message_connection == c) {
1021 m->queued_message_connection = NULL;
1023 if (m->queued_message) {
1024 dbus_message_unref(m->queued_message);
1025 m->queued_message = NULL;
1029 dbus_connection_set_dispatch_status_function(c, NULL, NULL, NULL);
1030 dbus_connection_flush(c);
1031 dbus_connection_close(c);
1032 dbus_connection_unref(c);
1035 static void bus_done_api(Manager *m) {
1039 if (m->system_bus == m->api_bus)
1040 m->system_bus = NULL;
1042 shutdown_connection(m, m->api_bus);
1047 if (m->queued_message) {
1048 dbus_message_unref(m->queued_message);
1049 m->queued_message = NULL;
1053 static void bus_done_system(Manager *m) {
1056 if (m->system_bus == m->api_bus)
1059 if (m->system_bus) {
1060 shutdown_connection(m, m->system_bus);
1061 m->system_bus = NULL;
1065 static void bus_done_private(Manager *m) {
1067 if (m->private_bus) {
1068 dbus_server_disconnect(m->private_bus);
1069 dbus_server_unref(m->private_bus);
1070 m->private_bus = NULL;
1074 void bus_done(Manager *m) {
1079 bus_done_private(m);
1081 while ((c = set_steal_first(m->bus_connections)))
1082 shutdown_connection(m, c);
1084 while ((c = set_steal_first(m->bus_connections_for_dispatch)))
1085 shutdown_connection(m, c);
1087 set_free(m->bus_connections);
1088 set_free(m->bus_connections_for_dispatch);
1090 if (m->name_data_slot >= 0)
1091 dbus_pending_call_free_data_slot(&m->name_data_slot);
1093 if (m->subscribed_data_slot >= 0)
1094 dbus_pending_call_free_data_slot(&m->subscribed_data_slot);
1097 static void query_pid_pending_cb(DBusPendingCall *pending, void *userdata) {
1098 Manager *m = userdata;
1103 dbus_error_init(&error);
1105 assert_se(name = BUS_PENDING_CALL_NAME(m, pending));
1106 assert_se(reply = dbus_pending_call_steal_reply(pending));
1108 switch (dbus_message_get_type(reply)) {
1110 case DBUS_MESSAGE_TYPE_ERROR:
1112 assert_se(dbus_set_error_from_message(&error, reply));
1113 log_warning("GetConnectionUnixProcessID() failed: %s", error.message);
1116 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
1119 if (!dbus_message_get_args(reply,
1121 DBUS_TYPE_UINT32, &r,
1122 DBUS_TYPE_INVALID)) {
1123 log_error("Failed to parse GetConnectionUnixProcessID() reply: %s", error.message);
1127 manager_dispatch_bus_query_pid_done(m, name, (pid_t) r);
1132 assert_not_reached("Invalid reply message");
1135 dbus_message_unref(reply);
1136 dbus_error_free(&error);
1139 int bus_query_pid(Manager *m, const char *name) {
1140 DBusMessage *message = NULL;
1141 DBusPendingCall *pending = NULL;
1147 if (!(message = dbus_message_new_method_call(
1150 DBUS_INTERFACE_DBUS,
1151 "GetConnectionUnixProcessID")))
1154 if (!(dbus_message_append_args(
1156 DBUS_TYPE_STRING, &name,
1157 DBUS_TYPE_INVALID)))
1160 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
1163 if (!(n = strdup(name)))
1166 if (!dbus_pending_call_set_data(pending, m->name_data_slot, n, free))
1171 if (!dbus_pending_call_set_notify(pending, query_pid_pending_cb, m, NULL))
1174 dbus_message_unref(message);
1175 dbus_pending_call_unref(pending);
1183 dbus_pending_call_cancel(pending);
1184 dbus_pending_call_unref(pending);
1188 dbus_message_unref(message);
1193 DBusHandlerResult bus_default_message_handler(Manager *m, DBusConnection *c, DBusMessage *message, const char*introspection, const BusProperty *properties) {
1195 DBusMessage *reply = NULL;
1201 dbus_error_init(&error);
1203 if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect") && introspection) {
1205 if (!(reply = dbus_message_new_method_return(message)))
1208 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID))
1211 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Get") && properties) {
1212 const char *interface, *property;
1213 const BusProperty *p;
1215 if (!dbus_message_get_args(
1218 DBUS_TYPE_STRING, &interface,
1219 DBUS_TYPE_STRING, &property,
1221 return bus_send_error_reply(m, c, message, &error, -EINVAL);
1223 for (p = properties; p->property; p++)
1224 if (streq(p->interface, interface) && streq(p->property, property))
1228 DBusMessageIter iter, sub;
1230 if (!(reply = dbus_message_new_method_return(message)))
1233 dbus_message_iter_init_append(reply, &iter);
1235 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, p->signature, &sub))
1238 if ((r = p->append(m, &sub, property, (void*) p->data)) < 0) {
1243 dbus_message_unref(reply);
1244 return bus_send_error_reply(m, c, message, NULL, r);
1247 if (!dbus_message_iter_close_container(&iter, &sub))
1251 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "GetAll") && properties) {
1252 const char *interface;
1253 const BusProperty *p;
1254 DBusMessageIter iter, sub, sub2, sub3;
1256 if (!dbus_message_get_args(
1259 DBUS_TYPE_STRING, &interface,
1261 return bus_send_error_reply(m, c, message, &error, -EINVAL);
1263 if (!(reply = dbus_message_new_method_return(message)))
1266 dbus_message_iter_init_append(reply, &iter);
1268 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub))
1271 for (p = properties; p->property; p++) {
1272 if (interface[0] && !streq(p->interface, interface))
1275 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, NULL, &sub2) ||
1276 !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &p->property) ||
1277 !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, p->signature, &sub3))
1280 if ((r = p->append(m, &sub3, p->property, (void*) p->data)) < 0) {
1285 dbus_message_unref(reply);
1286 return bus_send_error_reply(m, c, message, NULL, r);
1289 if (!dbus_message_iter_close_container(&sub2, &sub3) ||
1290 !dbus_message_iter_close_container(&sub, &sub2))
1294 if (!dbus_message_iter_close_container(&iter, &sub))
1299 if (!dbus_connection_send(c, reply, NULL))
1302 dbus_message_unref(reply);
1303 return DBUS_HANDLER_RESULT_HANDLED;
1306 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1310 dbus_message_unref(reply);
1312 dbus_error_free(&error);
1314 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1317 static const char *error_to_dbus(int error) {
1322 return DBUS_ERROR_INVALID_ARGS;
1325 return DBUS_ERROR_NO_MEMORY;
1329 return DBUS_ERROR_ACCESS_DENIED;
1332 return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN;
1335 return DBUS_ERROR_FILE_NOT_FOUND;
1338 return DBUS_ERROR_FILE_EXISTS;
1341 return DBUS_ERROR_TIMEOUT;
1344 return DBUS_ERROR_IO_ERROR;
1349 return DBUS_ERROR_DISCONNECTED;
1352 return DBUS_ERROR_FAILED;
1355 DBusHandlerResult bus_send_error_reply(Manager *m, DBusConnection *c, DBusMessage *message, DBusError *berror, int error) {
1356 DBusMessage *reply = NULL;
1357 const char *name, *text;
1359 if (berror && dbus_error_is_set(berror)) {
1360 name = berror->name;
1361 text = berror->message;
1363 name = error_to_dbus(error);
1364 text = strerror(-error);
1367 if (!(reply = dbus_message_new_error(message, name, text)))
1370 if (!dbus_connection_send(c, reply, NULL))
1373 dbus_message_unref(reply);
1376 dbus_error_free(berror);
1378 return DBUS_HANDLER_RESULT_HANDLED;
1382 dbus_message_unref(reply);
1385 dbus_error_free(berror);
1387 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1390 int bus_broadcast(Manager *m, DBusMessage *message) {
1398 SET_FOREACH(c, m->bus_connections_for_dispatch, i)
1399 if (c != m->system_bus || m->running_as == MANAGER_SYSTEM)
1400 oom = !dbus_connection_send(c, message, NULL);
1402 SET_FOREACH(c, m->bus_connections, i)
1403 if (c != m->system_bus || m->running_as == MANAGER_SYSTEM)
1404 oom = !dbus_connection_send(c, message, NULL);
1406 return oom ? -ENOMEM : 0;
1409 int bus_property_append_string(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1410 const char *t = data;
1419 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
1425 int bus_property_append_strv(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1426 DBusMessageIter sub;
1433 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
1437 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, t))
1440 if (!dbus_message_iter_close_container(i, &sub))
1446 int bus_property_append_bool(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1457 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db))
1463 int bus_property_append_uint64(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1469 /* Let's ensure that pid_t is actually 64bit, and hence this
1470 * function can be used for usec_t */
1471 assert_cc(sizeof(uint64_t) == sizeof(usec_t));
1473 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, data))
1479 int bus_property_append_uint32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1485 /* Let's ensure that pid_t and mode_t is actually 32bit, and
1486 * hence this function can be used for pid_t/mode_t */
1487 assert_cc(sizeof(uint32_t) == sizeof(pid_t));
1488 assert_cc(sizeof(uint32_t) == sizeof(mode_t));
1489 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
1491 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data))
1497 int bus_property_append_int32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1503 assert_cc(sizeof(int32_t) == sizeof(int));
1505 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, data))
1511 int bus_property_append_size(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1519 u = (uint64_t) *(size_t*) data;
1521 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
1527 int bus_property_append_ul(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1535 u = (uint64_t) *(unsigned long*) data;
1537 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
1543 int bus_parse_strv(DBusMessage *m, char ***_l) {
1544 DBusMessageIter iter, sub;
1545 unsigned n = 0, i = 0;
1551 if (!dbus_message_iter_init(m, &iter) ||
1552 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
1553 dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
1556 dbus_message_iter_recurse(&iter, &sub);
1558 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1560 dbus_message_iter_next(&sub);
1563 if (!(l = new(char*, n+1)))
1566 assert_se(dbus_message_iter_init(m, &iter));
1567 dbus_message_iter_recurse(&iter, &sub);
1569 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1572 assert_se(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
1573 dbus_message_iter_get_basic(&sub, &s);
1575 if (!(l[i++] = strdup(s))) {
1580 dbus_message_iter_next(&sub);
1592 bool bus_has_subscriber(Manager *m) {
1598 SET_FOREACH(c, m->bus_connections_for_dispatch, i)
1599 if (bus_connection_has_subscriber(m, c))
1602 SET_FOREACH(c, m->bus_connections, i)
1603 if (bus_connection_has_subscriber(m, c))
1609 bool bus_connection_has_subscriber(Manager *m, DBusConnection *c) {
1613 return !set_isempty(BUS_CONNECTION_SUBSCRIBED(m, c));
1616 DBusMessage* bus_properties_changed_new(const char *path, const char *interface, const char *properties) {
1618 DBusMessageIter iter, sub;
1624 if (!(m = dbus_message_new_signal(path, "org.freedesktop.DBus.Properties", "PropertiesChanged")))
1627 dbus_message_iter_init_append(m, &iter);
1629 /* We won't send any property values, since they might be
1630 * large and sometimes not cheap to generated */
1632 if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &interface) ||
1633 !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub) ||
1634 !dbus_message_iter_close_container(&iter, &sub) ||
1635 !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub))
1638 NULSTR_FOREACH(i, properties)
1639 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &i))
1642 if (!dbus_message_iter_close_container(&iter, &sub))
1649 dbus_message_unref(m);