1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
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 log_debug("Got D-Bus request: %s.%s() on %s",
342 dbus_message_get_interface(message),
343 dbus_message_get_member(message),
344 dbus_message_get_path(message));
346 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
347 log_error("Warning! API D-Bus connection terminated.");
350 } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) {
351 const char *name, *old_owner, *new_owner;
353 if (!dbus_message_get_args(message, &error,
354 DBUS_TYPE_STRING, &name,
355 DBUS_TYPE_STRING, &old_owner,
356 DBUS_TYPE_STRING, &new_owner,
358 log_error("Failed to parse NameOwnerChanged message: %s", error.message);
360 if (set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) name))
361 log_debug("Subscription client vanished: %s (left: %u)", name, set_size(BUS_CONNECTION_SUBSCRIBED(m, connection)));
363 if (old_owner[0] == 0)
366 if (new_owner[0] == 0)
369 manager_dispatch_bus_name_owner_changed(m, name, old_owner, new_owner);
371 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Activator", "ActivationRequest")) {
374 if (!dbus_message_get_args(message, &error,
375 DBUS_TYPE_STRING, &name,
377 log_error("Failed to parse ActivationRequest message: %s", error.message);
382 log_debug("Got D-Bus activation request for %s", name);
384 r = manager_load_unit(m, name, NULL, &error, &u);
386 if (r >= 0 && u->meta.only_by_dependency)
390 r = manager_add_job(m, JOB_START, u, JOB_REPLACE, true, &error, NULL);
393 const char *id, *text;
395 log_warning("D-Bus activation failed for %s: %s", name, strerror(-r));
397 if (!(reply = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure")))
400 id = error.name ? error.name : error_to_dbus(r);
401 text = bus_error(&error, r);
403 if (!dbus_message_set_destination(reply, DBUS_SERVICE_DBUS) ||
404 !dbus_message_append_args(reply,
405 DBUS_TYPE_STRING, &name,
406 DBUS_TYPE_STRING, &id,
407 DBUS_TYPE_STRING, &text,
412 /* On success we don't do anything, the service will be spwaned now */
416 dbus_error_free(&error);
419 if (!dbus_connection_send(connection, reply, NULL))
422 dbus_message_unref(reply);
425 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
429 dbus_message_unref(reply);
431 dbus_error_free(&error);
433 return DBUS_HANDLER_RESULT_NEED_MEMORY;
436 static DBusHandlerResult system_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
444 dbus_error_init(&error);
446 log_debug("Got D-Bus request: %s.%s() on %s",
447 dbus_message_get_interface(message),
448 dbus_message_get_member(message),
449 dbus_message_get_path(message));
451 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
452 log_error("Warning! System D-Bus connection terminated.");
455 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
458 if (!dbus_message_get_args(message, &error,
459 DBUS_TYPE_STRING, &cgroup,
461 log_error("Failed to parse Released message: %s", error.message);
463 cgroup_notify_empty(m, cgroup);
466 dbus_error_free(&error);
467 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
470 static DBusHandlerResult private_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
477 log_debug("Got D-Bus request: %s.%s() on %s",
478 dbus_message_get_interface(message),
479 dbus_message_get_member(message),
480 dbus_message_get_path(message));
482 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected"))
483 shutdown_connection(m, connection);
485 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
488 unsigned bus_dispatch(Manager *m) {
493 if (m->queued_message) {
494 /* If we cannot get rid of this message we won't
495 * dispatch any D-Bus messages, so that we won't end
496 * up wanting to queue another message. */
498 if (m->queued_message_connection)
499 if (!dbus_connection_send(m->queued_message_connection, m->queued_message, NULL))
502 dbus_message_unref(m->queued_message);
503 m->queued_message = NULL;
504 m->queued_message_connection = NULL;
507 if ((c = set_first(m->bus_connections_for_dispatch))) {
508 if (dbus_connection_dispatch(c) == DBUS_DISPATCH_COMPLETE)
509 set_move_one(m->bus_connections, m->bus_connections_for_dispatch, c);
517 static void request_name_pending_cb(DBusPendingCall *pending, void *userdata) {
521 dbus_error_init(&error);
523 assert_se(reply = dbus_pending_call_steal_reply(pending));
525 switch (dbus_message_get_type(reply)) {
527 case DBUS_MESSAGE_TYPE_ERROR:
529 assert_se(dbus_set_error_from_message(&error, reply));
530 log_warning("RequestName() failed: %s", error.message);
533 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
536 if (!dbus_message_get_args(reply,
538 DBUS_TYPE_UINT32, &r,
539 DBUS_TYPE_INVALID)) {
540 log_error("Failed to parse RequestName() reply: %s", error.message);
545 log_debug("Successfully acquired name.");
547 log_error("Name already owned.");
553 assert_not_reached("Invalid reply message");
556 dbus_message_unref(reply);
557 dbus_error_free(&error);
560 static int request_name(Manager *m) {
561 const char *name = "org.freedesktop.systemd1";
563 DBusMessage *message = NULL;
564 DBusPendingCall *pending = NULL;
566 if (!(message = dbus_message_new_method_call(
573 if (!dbus_message_append_args(
575 DBUS_TYPE_STRING, &name,
576 DBUS_TYPE_UINT32, &flags,
580 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
583 if (!dbus_pending_call_set_notify(pending, request_name_pending_cb, m, NULL))
586 dbus_message_unref(message);
587 dbus_pending_call_unref(pending);
589 /* We simple ask for the name and don't wait for it. Sooner or
590 * later we'll have it. */
596 dbus_pending_call_cancel(pending);
597 dbus_pending_call_unref(pending);
601 dbus_message_unref(message);
606 static void query_name_list_pending_cb(DBusPendingCall *pending, void *userdata) {
609 Manager *m = userdata;
613 dbus_error_init(&error);
615 assert_se(reply = dbus_pending_call_steal_reply(pending));
617 switch (dbus_message_get_type(reply)) {
619 case DBUS_MESSAGE_TYPE_ERROR:
621 assert_se(dbus_set_error_from_message(&error, reply));
622 log_warning("ListNames() failed: %s", error.message);
625 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
629 if ((r = bus_parse_strv(reply, &l)) < 0)
630 log_warning("Failed to parse ListNames() reply: %s", strerror(-r));
635 /* This is a bit hacky, we say the
636 * owner of the name is the name
637 * itself, because we don't want the
638 * extra traffic to figure out the
640 manager_dispatch_bus_name_owner_changed(m, *t, NULL, *t);
649 assert_not_reached("Invalid reply message");
652 dbus_message_unref(reply);
653 dbus_error_free(&error);
656 static int query_name_list(Manager *m) {
657 DBusMessage *message = NULL;
658 DBusPendingCall *pending = NULL;
660 /* Asks for the currently installed bus names */
662 if (!(message = dbus_message_new_method_call(
669 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
672 if (!dbus_pending_call_set_notify(pending, query_name_list_pending_cb, m, NULL))
675 dbus_message_unref(message);
676 dbus_pending_call_unref(pending);
678 /* We simple ask for the list and don't wait for it. Sooner or
679 * later we'll get it. */
685 dbus_pending_call_cancel(pending);
686 dbus_pending_call_unref(pending);
690 dbus_message_unref(message);
695 static int bus_setup_loop(Manager *m, DBusConnection *bus) {
699 dbus_connection_set_exit_on_disconnect(bus, FALSE);
701 if (!dbus_connection_set_watch_functions(bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
702 !dbus_connection_set_timeout_functions(bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) {
703 log_error("Not enough memory");
707 if (set_put(m->bus_connections_for_dispatch, bus) < 0) {
708 log_error("Not enough memory");
712 dbus_connection_set_dispatch_status_function(bus, bus_dispatch_status, m, NULL);
716 static dbus_bool_t allow_only_root(DBusConnection *connection, unsigned long uid, void *data) {
720 static void bus_new_connection(
722 DBusConnection *new_connection,
729 if (set_size(m->bus_connections) >= CONNECTIONS_MAX) {
730 log_error("Too many concurrent connections.");
734 dbus_connection_set_unix_user_function(new_connection, allow_only_root, NULL, NULL);
736 if (bus_setup_loop(m, new_connection) < 0)
739 if (!dbus_connection_register_object_path(new_connection, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
740 !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
741 !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
742 !dbus_connection_add_filter(new_connection, private_bus_message_filter, m, NULL)) {
743 log_error("Not enough memory.");
747 log_debug("Accepted connection on private bus.");
749 dbus_connection_ref(new_connection);
752 static int bus_init_system(Manager *m) {
759 dbus_error_init(&error);
764 if (m->running_as == MANAGER_SYSTEM && m->api_bus)
765 m->system_bus = m->api_bus;
767 if (!(m->system_bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error))) {
768 log_debug("Failed to get system D-Bus connection, retrying later: %s", error.message);
773 if ((r = bus_setup_loop(m, m->system_bus)) < 0)
777 if (!dbus_connection_add_filter(m->system_bus, system_bus_message_filter, m, NULL)) {
778 log_error("Not enough memory");
783 dbus_bus_add_match(m->system_bus,
785 "interface='org.freedesktop.systemd1.Agent',"
787 "path='/org/freedesktop/systemd1/agent'",
790 if (dbus_error_is_set(&error)) {
791 log_error("Failed to register match: %s", error.message);
796 log_info("Successfully connected to system D-Bus bus %s as %s",
797 strnull((id = dbus_connection_get_server_id(m->system_bus))),
798 strnull(dbus_bus_get_unique_name(m->system_bus)));
805 dbus_error_free(&error);
810 static int bus_init_api(Manager *m) {
817 dbus_error_init(&error);
822 if (m->running_as == MANAGER_SYSTEM && m->system_bus)
823 m->api_bus = m->system_bus;
825 if (!(m->api_bus = dbus_bus_get_private(m->running_as == MANAGER_SESSION ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error))) {
826 log_debug("Failed to get API D-Bus connection, retrying later: %s", error.message);
831 if ((r = bus_setup_loop(m, m->api_bus)) < 0)
835 if (!dbus_connection_register_object_path(m->api_bus, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
836 !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
837 !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
838 !dbus_connection_add_filter(m->api_bus, api_bus_message_filter, m, NULL)) {
839 log_error("Not enough memory");
844 /* Get NameOwnerChange messages */
845 dbus_bus_add_match(m->api_bus,
847 "sender='"DBUS_SERVICE_DBUS"',"
848 "interface='"DBUS_INTERFACE_DBUS"',"
849 "member='NameOwnerChanged',"
850 "path='"DBUS_PATH_DBUS"'",
853 if (dbus_error_is_set(&error)) {
854 log_error("Failed to register match: %s", error.message);
859 /* Get activation requests */
860 dbus_bus_add_match(m->api_bus,
862 "sender='"DBUS_SERVICE_DBUS"',"
863 "interface='org.freedesktop.systemd1.Activator',"
864 "member='ActivationRequest',"
865 "path='"DBUS_PATH_DBUS"'",
868 if (dbus_error_is_set(&error)) {
869 log_error("Failed to register match: %s", error.message);
874 if ((r = request_name(m)) < 0)
877 if ((r = query_name_list(m)) < 0)
880 log_info("Successfully connected to API D-Bus bus %s as %s",
881 strnull((id = dbus_connection_get_server_id(m->api_bus))),
882 strnull(dbus_bus_get_unique_name(m->api_bus)));
889 dbus_error_free(&error);
894 static int bus_init_private(Manager *m) {
897 const char *const external_only[] = {
904 dbus_error_init(&error);
909 /* We want the private bus only when running as init */
910 if (m->running_as != MANAGER_SYSTEM)
913 if (!(m->private_bus = dbus_server_listen("unix:abstract=/org/freedesktop/systemd1/private", &error))) {
914 log_error("Failed to create private D-Bus server: %s", error.message);
919 if (!dbus_server_set_auth_mechanisms(m->private_bus, (const char**) external_only) ||
920 !dbus_server_set_watch_functions(m->private_bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
921 !dbus_server_set_timeout_functions(m->private_bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) {
922 log_error("Not enough memory");
927 dbus_server_set_new_connection_function(m->private_bus, bus_new_connection, m, NULL);
929 log_debug("Successfully created private D-Bus server.");
935 dbus_error_free(&error);
940 int bus_init(Manager *m) {
943 if (set_ensure_allocated(&m->bus_connections, trivial_hash_func, trivial_compare_func) < 0 ||
944 set_ensure_allocated(&m->bus_connections_for_dispatch, trivial_hash_func, trivial_compare_func) < 0) {
945 log_error("Not enough memory");
949 if (m->name_data_slot < 0)
950 if (!dbus_pending_call_allocate_data_slot(&m->name_data_slot)) {
951 log_error("Not enough memory");
955 if (m->subscribed_data_slot < 0)
956 if (!dbus_pending_call_allocate_data_slot(&m->subscribed_data_slot)) {
957 log_error("Not enough memory");
961 if ((r = bus_init_system(m)) < 0 ||
962 (r = bus_init_api(m)) < 0 ||
963 (r = bus_init_private(m)) < 0)
969 static void shutdown_connection(Manager *m, DBusConnection *c) {
974 HASHMAP_FOREACH(j, m->jobs, i)
977 j->bus_client = NULL;
982 set_remove(m->bus_connections, c);
983 set_remove(m->bus_connections_for_dispatch, c);
985 if ((s = BUS_CONNECTION_SUBSCRIBED(m, c))) {
988 while ((t = set_steal_first(s)))
994 if (m->queued_message_connection == c) {
995 m->queued_message_connection = NULL;
997 if (m->queued_message) {
998 dbus_message_unref(m->queued_message);
999 m->queued_message = NULL;
1003 dbus_connection_set_dispatch_status_function(c, NULL, NULL, NULL);
1004 dbus_connection_flush(c);
1005 dbus_connection_close(c);
1006 dbus_connection_unref(c);
1009 static void bus_done_api(Manager *m) {
1013 if (m->system_bus == m->api_bus)
1014 m->system_bus = NULL;
1016 shutdown_connection(m, m->api_bus);
1021 if (m->queued_message) {
1022 dbus_message_unref(m->queued_message);
1023 m->queued_message = NULL;
1027 static void bus_done_system(Manager *m) {
1030 if (m->system_bus == m->api_bus)
1033 if (m->system_bus) {
1034 shutdown_connection(m, m->system_bus);
1035 m->system_bus = NULL;
1039 static void bus_done_private(Manager *m) {
1041 if (m->private_bus) {
1042 dbus_server_disconnect(m->private_bus);
1043 dbus_server_unref(m->private_bus);
1044 m->private_bus = NULL;
1048 void bus_done(Manager *m) {
1053 bus_done_private(m);
1055 while ((c = set_steal_first(m->bus_connections)))
1056 shutdown_connection(m, c);
1058 while ((c = set_steal_first(m->bus_connections_for_dispatch)))
1059 shutdown_connection(m, c);
1061 set_free(m->bus_connections);
1062 set_free(m->bus_connections_for_dispatch);
1064 if (m->name_data_slot >= 0)
1065 dbus_pending_call_free_data_slot(&m->name_data_slot);
1067 if (m->subscribed_data_slot >= 0)
1068 dbus_pending_call_free_data_slot(&m->subscribed_data_slot);
1071 static void query_pid_pending_cb(DBusPendingCall *pending, void *userdata) {
1072 Manager *m = userdata;
1077 dbus_error_init(&error);
1079 assert_se(name = BUS_PENDING_CALL_NAME(m, pending));
1080 assert_se(reply = dbus_pending_call_steal_reply(pending));
1082 switch (dbus_message_get_type(reply)) {
1084 case DBUS_MESSAGE_TYPE_ERROR:
1086 assert_se(dbus_set_error_from_message(&error, reply));
1087 log_warning("GetConnectionUnixProcessID() failed: %s", error.message);
1090 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
1093 if (!dbus_message_get_args(reply,
1095 DBUS_TYPE_UINT32, &r,
1096 DBUS_TYPE_INVALID)) {
1097 log_error("Failed to parse GetConnectionUnixProcessID() reply: %s", error.message);
1101 manager_dispatch_bus_query_pid_done(m, name, (pid_t) r);
1106 assert_not_reached("Invalid reply message");
1109 dbus_message_unref(reply);
1110 dbus_error_free(&error);
1113 int bus_query_pid(Manager *m, const char *name) {
1114 DBusMessage *message = NULL;
1115 DBusPendingCall *pending = NULL;
1121 if (!(message = dbus_message_new_method_call(
1124 DBUS_INTERFACE_DBUS,
1125 "GetConnectionUnixProcessID")))
1128 if (!(dbus_message_append_args(
1130 DBUS_TYPE_STRING, &name,
1131 DBUS_TYPE_INVALID)))
1134 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
1137 if (!(n = strdup(name)))
1140 if (!dbus_pending_call_set_data(pending, m->name_data_slot, n, free))
1145 if (!dbus_pending_call_set_notify(pending, query_pid_pending_cb, m, NULL))
1148 dbus_message_unref(message);
1149 dbus_pending_call_unref(pending);
1157 dbus_pending_call_cancel(pending);
1158 dbus_pending_call_unref(pending);
1162 dbus_message_unref(message);
1167 DBusHandlerResult bus_default_message_handler(Manager *m, DBusConnection *c, DBusMessage *message, const char*introspection, const BusProperty *properties) {
1169 DBusMessage *reply = NULL;
1175 dbus_error_init(&error);
1177 if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect") && introspection) {
1179 if (!(reply = dbus_message_new_method_return(message)))
1182 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID))
1185 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Get") && properties) {
1186 const char *interface, *property;
1187 const BusProperty *p;
1189 if (!dbus_message_get_args(
1192 DBUS_TYPE_STRING, &interface,
1193 DBUS_TYPE_STRING, &property,
1195 return bus_send_error_reply(m, c, message, &error, -EINVAL);
1197 for (p = properties; p->property; p++)
1198 if (streq(p->interface, interface) && streq(p->property, property))
1202 DBusMessageIter iter, sub;
1204 if (!(reply = dbus_message_new_method_return(message)))
1207 dbus_message_iter_init_append(reply, &iter);
1209 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, p->signature, &sub))
1212 if ((r = p->append(m, &sub, property, (void*) p->data)) < 0) {
1217 dbus_message_unref(reply);
1218 return bus_send_error_reply(m, c, message, NULL, r);
1221 if (!dbus_message_iter_close_container(&iter, &sub))
1224 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "GetAll") && properties) {
1225 const char *interface;
1226 const BusProperty *p;
1227 DBusMessageIter iter, sub, sub2, sub3;
1229 if (!dbus_message_get_args(
1232 DBUS_TYPE_STRING, &interface,
1234 return bus_send_error_reply(m, c, message, &error, -EINVAL);
1236 if (!(reply = dbus_message_new_method_return(message)))
1239 dbus_message_iter_init_append(reply, &iter);
1241 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub))
1244 for (p = properties; p->property; p++) {
1245 if (interface[0] && !streq(p->interface, interface))
1248 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, NULL, &sub2) ||
1249 !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &p->property) ||
1250 !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, p->signature, &sub3))
1253 if ((r = p->append(m, &sub3, p->property, (void*) p->data)) < 0) {
1258 dbus_message_unref(reply);
1259 return bus_send_error_reply(m, c, message, NULL, r);
1262 if (!dbus_message_iter_close_container(&sub2, &sub3) ||
1263 !dbus_message_iter_close_container(&sub, &sub2))
1267 if (!dbus_message_iter_close_container(&iter, &sub))
1272 if (!dbus_connection_send(c, reply, NULL))
1275 dbus_message_unref(reply);
1276 return DBUS_HANDLER_RESULT_HANDLED;
1279 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1283 dbus_message_unref(reply);
1285 dbus_error_free(&error);
1287 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1290 static const char *error_to_dbus(int error) {
1295 return DBUS_ERROR_INVALID_ARGS;
1298 return DBUS_ERROR_NO_MEMORY;
1302 return DBUS_ERROR_ACCESS_DENIED;
1305 return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN;
1308 return DBUS_ERROR_FILE_NOT_FOUND;
1311 return DBUS_ERROR_FILE_EXISTS;
1314 return DBUS_ERROR_TIMEOUT;
1317 return DBUS_ERROR_IO_ERROR;
1322 return DBUS_ERROR_DISCONNECTED;
1325 return DBUS_ERROR_FAILED;
1328 DBusHandlerResult bus_send_error_reply(Manager *m, DBusConnection *c, DBusMessage *message, DBusError *berror, int error) {
1329 DBusMessage *reply = NULL;
1330 const char *name, *text;
1332 if (berror && dbus_error_is_set(berror)) {
1333 name = berror->name;
1334 text = berror->message;
1336 name = error_to_dbus(error);
1337 text = strerror(-error);
1340 if (!(reply = dbus_message_new_error(message, name, text)))
1343 if (!dbus_connection_send(c, reply, NULL))
1346 dbus_message_unref(reply);
1349 dbus_error_free(berror);
1351 return DBUS_HANDLER_RESULT_HANDLED;
1355 dbus_message_unref(reply);
1358 dbus_error_free(berror);
1360 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1363 int bus_broadcast(Manager *m, DBusMessage *message) {
1371 SET_FOREACH(c, m->bus_connections_for_dispatch, i)
1372 if (c != m->system_bus || m->running_as == MANAGER_SYSTEM)
1373 oom = !dbus_connection_send(c, message, NULL);
1375 SET_FOREACH(c, m->bus_connections, i)
1376 if (c != m->system_bus || m->running_as == MANAGER_SYSTEM)
1377 oom = !dbus_connection_send(c, message, NULL);
1379 return oom ? -ENOMEM : 0;
1382 int bus_property_append_string(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1383 const char *t = data;
1392 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
1398 int bus_property_append_strv(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1399 DBusMessageIter sub;
1406 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
1410 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, t))
1413 if (!dbus_message_iter_close_container(i, &sub))
1419 int bus_property_append_bool(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1430 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db))
1436 int bus_property_append_uint64(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1442 /* Let's ensure that pid_t is actually 64bit, and hence this
1443 * function can be used for usec_t */
1444 assert_cc(sizeof(uint64_t) == sizeof(usec_t));
1446 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, data))
1452 int bus_property_append_uint32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1458 /* Let's ensure that pid_t and mode_t is actually 32bit, and
1459 * hence this function can be used for pid_t/mode_t */
1460 assert_cc(sizeof(uint32_t) == sizeof(pid_t));
1461 assert_cc(sizeof(uint32_t) == sizeof(mode_t));
1462 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
1464 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data))
1470 int bus_property_append_int32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1476 assert_cc(sizeof(int32_t) == sizeof(int));
1478 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, data))
1484 int bus_property_append_size(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1492 u = (uint64_t) *(size_t*) data;
1494 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
1500 int bus_property_append_ul(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1508 u = (uint64_t) *(unsigned long*) data;
1510 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
1516 int bus_parse_strv(DBusMessage *m, char ***_l) {
1517 DBusMessageIter iter, sub;
1518 unsigned n = 0, i = 0;
1524 if (!dbus_message_iter_init(m, &iter) ||
1525 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
1526 dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
1529 dbus_message_iter_recurse(&iter, &sub);
1531 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1533 dbus_message_iter_next(&sub);
1536 if (!(l = new(char*, n+1)))
1539 assert_se(dbus_message_iter_init(m, &iter));
1540 dbus_message_iter_recurse(&iter, &sub);
1542 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1545 assert_se(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
1546 dbus_message_iter_get_basic(&sub, &s);
1548 if (!(l[i++] = strdup(s))) {
1553 dbus_message_iter_next(&sub);
1565 bool bus_has_subscriber(Manager *m) {
1571 SET_FOREACH(c, m->bus_connections_for_dispatch, i)
1572 if (bus_connection_has_subscriber(m, c))
1575 SET_FOREACH(c, m->bus_connections, i)
1576 if (bus_connection_has_subscriber(m, c))
1582 bool bus_connection_has_subscriber(Manager *m, DBusConnection *c) {
1586 return !set_isempty(BUS_CONNECTION_SUBSCRIBED(m, c));