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"
46 #define CONNECTIONS_MAX 52
48 static const char bus_properties_interface[] = BUS_PROPERTIES_INTERFACE;
49 static const char bus_introspectable_interface[] = BUS_INTROSPECTABLE_INTERFACE;
51 const char *const bus_interface_table[] = {
52 "org.freedesktop.DBus.Properties", bus_properties_interface,
53 "org.freedesktop.DBus.Introspectable", bus_introspectable_interface,
54 "org.freedesktop.systemd1.Manager", bus_manager_interface,
55 "org.freedesktop.systemd1.Job", bus_job_interface,
56 "org.freedesktop.systemd1.Unit", bus_unit_interface,
57 "org.freedesktop.systemd1.Service", bus_service_interface,
58 "org.freedesktop.systemd1.Socket", bus_socket_interface,
59 "org.freedesktop.systemd1.Target", bus_target_interface,
60 "org.freedesktop.systemd1.Device", bus_device_interface,
61 "org.freedesktop.systemd1.Mount", bus_mount_interface,
62 "org.freedesktop.systemd1.Automount", bus_automount_interface,
63 "org.freedesktop.systemd1.Snapshot", bus_snapshot_interface,
64 "org.freedesktop.systemd1.Swap", bus_swap_interface,
65 "org.freedesktop.systemd1.Timer", bus_timer_interface,
66 "org.freedesktop.systemd1.Path", bus_path_interface,
70 static const char *error_to_dbus(int error);
71 static void bus_done_api(Manager *m);
72 static void bus_done_system(Manager *m);
73 static void bus_done_private(Manager *m);
75 static void bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) {
81 /* We maintain two sets, one for those connections where we
82 * requested a dispatch, and another where we didn't. And then,
83 * we move the connections between the two sets. */
85 if (status == DBUS_DISPATCH_COMPLETE)
86 set_move_one(m->bus_connections, m->bus_connections_for_dispatch, bus);
88 set_move_one(m->bus_connections_for_dispatch, m->bus_connections, bus);
91 static uint32_t bus_flags_to_events(DBusWatch *bus_watch) {
97 /* no watch flags for disabled watches */
98 if (!dbus_watch_get_enabled(bus_watch))
101 flags = dbus_watch_get_flags(bus_watch);
103 if (flags & DBUS_WATCH_READABLE)
105 if (flags & DBUS_WATCH_WRITABLE)
108 return events | EPOLLHUP | EPOLLERR;
111 static unsigned events_to_bus_flags(uint32_t events) {
114 if (events & EPOLLIN)
115 flags |= DBUS_WATCH_READABLE;
116 if (events & EPOLLOUT)
117 flags |= DBUS_WATCH_WRITABLE;
118 if (events & EPOLLHUP)
119 flags |= DBUS_WATCH_HANGUP;
120 if (events & EPOLLERR)
121 flags |= DBUS_WATCH_ERROR;
126 void bus_watch_event(Manager *m, Watch *w, int events) {
130 /* This is called by the event loop whenever there is
131 * something happening on D-Bus' file handles. */
133 if (!dbus_watch_get_enabled(w->data.bus_watch))
136 dbus_watch_handle(w->data.bus_watch, events_to_bus_flags(events));
139 static dbus_bool_t bus_add_watch(DBusWatch *bus_watch, void *data) {
142 struct epoll_event ev;
147 if (!(w = new0(Watch, 1)))
150 w->fd = dbus_watch_get_unix_fd(bus_watch);
151 w->type = WATCH_DBUS_WATCH;
152 w->data.bus_watch = bus_watch;
155 ev.events = bus_flags_to_events(bus_watch);
158 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) {
160 if (errno != EEXIST) {
165 /* Hmm, bloody D-Bus creates multiple watches on the
166 * same fd. epoll() does not like that. As a dirty
167 * hack we simply dup() the fd and hence get a second
168 * one we can safely add to the epoll(). */
170 if ((w->fd = dup(w->fd)) < 0) {
175 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) {
177 close_nointr_nofail(w->fd);
181 w->fd_is_dupped = true;
184 dbus_watch_set_data(bus_watch, w, NULL);
189 static void bus_remove_watch(DBusWatch *bus_watch, void *data) {
196 if (!(w = dbus_watch_get_data(bus_watch)))
199 assert(w->type == WATCH_DBUS_WATCH);
200 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
203 close_nointr_nofail(w->fd);
208 static void bus_toggle_watch(DBusWatch *bus_watch, void *data) {
211 struct epoll_event ev;
216 assert_se(w = dbus_watch_get_data(bus_watch));
217 assert(w->type == WATCH_DBUS_WATCH);
220 ev.events = bus_flags_to_events(bus_watch);
223 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_MOD, w->fd, &ev) == 0);
226 static int bus_timeout_arm(Manager *m, Watch *w) {
227 struct itimerspec its;
234 if (dbus_timeout_get_enabled(w->data.bus_timeout)) {
235 timespec_store(&its.it_value, dbus_timeout_get_interval(w->data.bus_timeout) * USEC_PER_MSEC);
236 its.it_interval = its.it_interval;
239 if (timerfd_settime(w->fd, 0, &its, NULL) < 0)
245 void bus_timeout_event(Manager *m, Watch *w, int events) {
249 /* This is called by the event loop whenever there is
250 * something happening on D-Bus' file handles. */
252 if (!(dbus_timeout_get_enabled(w->data.bus_timeout)))
255 dbus_timeout_handle(w->data.bus_timeout);
258 static dbus_bool_t bus_add_timeout(DBusTimeout *timeout, void *data) {
261 struct epoll_event ev;
266 if (!(w = new0(Watch, 1)))
269 if (!(w->fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
272 w->type = WATCH_DBUS_TIMEOUT;
273 w->data.bus_timeout = timeout;
275 if (bus_timeout_arm(m, w) < 0)
282 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0)
285 dbus_timeout_set_data(timeout, w, NULL);
291 close_nointr_nofail(w->fd);
297 static void bus_remove_timeout(DBusTimeout *timeout, void *data) {
304 if (!(w = dbus_timeout_get_data(timeout)))
307 assert(w->type == WATCH_DBUS_TIMEOUT);
308 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
309 close_nointr_nofail(w->fd);
313 static void bus_toggle_timeout(DBusTimeout *timeout, void *data) {
321 assert_se(w = dbus_timeout_get_data(timeout));
322 assert(w->type == WATCH_DBUS_TIMEOUT);
324 if ((r = bus_timeout_arm(m, w)) < 0)
325 log_error("Failed to rearm timer: %s", strerror(-r));
328 static DBusHandlerResult api_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
331 DBusMessage *reply = NULL;
337 dbus_error_init(&error);
339 /* log_debug("Got D-Bus request: %s.%s() on %s", */
340 /* dbus_message_get_interface(message), */
341 /* dbus_message_get_member(message), */
342 /* dbus_message_get_path(message)); */
344 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
345 log_error("Warning! API D-Bus connection terminated.");
348 } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) {
349 const char *name, *old_owner, *new_owner;
351 if (!dbus_message_get_args(message, &error,
352 DBUS_TYPE_STRING, &name,
353 DBUS_TYPE_STRING, &old_owner,
354 DBUS_TYPE_STRING, &new_owner,
356 log_error("Failed to parse NameOwnerChanged message: %s", error.message);
358 if (set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) name))
359 log_debug("Subscription client vanished: %s (left: %u)", name, set_size(BUS_CONNECTION_SUBSCRIBED(m, connection)));
361 if (old_owner[0] == 0)
364 if (new_owner[0] == 0)
367 manager_dispatch_bus_name_owner_changed(m, name, old_owner, new_owner);
369 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Activator", "ActivationRequest")) {
372 if (!dbus_message_get_args(message, &error,
373 DBUS_TYPE_STRING, &name,
375 log_error("Failed to parse ActivationRequest message: %s", error.message);
380 log_debug("Got D-Bus activation request for %s", name);
382 r = manager_load_unit(m, name, NULL, &u);
384 if (r >= 0 && u->meta.only_by_dependency)
388 r = manager_add_job(m, JOB_START, u, JOB_REPLACE, true, NULL);
391 const char *id, *text;
393 log_warning("D-Bus activation failed for %s: %s", name, strerror(-r));
395 if (!(reply = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure")))
398 id = error_to_dbus(r);
401 if (!dbus_message_set_destination(reply, DBUS_SERVICE_DBUS) ||
402 !dbus_message_append_args(reply,
403 DBUS_TYPE_STRING, &name,
404 DBUS_TYPE_STRING, &id,
405 DBUS_TYPE_STRING, &text,
410 /* On success we don't do anything, the service will be spwaned now */
414 dbus_error_free(&error);
417 if (!dbus_connection_send(connection, reply, NULL))
420 dbus_message_unref(reply);
423 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
427 dbus_message_unref(reply);
429 dbus_error_free(&error);
431 return DBUS_HANDLER_RESULT_NEED_MEMORY;
434 static DBusHandlerResult system_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
442 dbus_error_init(&error);
444 /* log_debug("Got D-Bus request: %s.%s() on %s", */
445 /* dbus_message_get_interface(message), */
446 /* dbus_message_get_member(message), */
447 /* dbus_message_get_path(message)); */
449 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
450 log_error("Warning! System D-Bus connection terminated.");
453 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
456 if (!dbus_message_get_args(message, &error,
457 DBUS_TYPE_STRING, &cgroup,
459 log_error("Failed to parse Released message: %s", error.message);
461 cgroup_notify_empty(m, cgroup);
464 dbus_error_free(&error);
465 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
468 static DBusHandlerResult private_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
475 /* log_debug("Got D-Bus request: %s.%s() on %s", */
476 /* dbus_message_get_interface(message), */
477 /* dbus_message_get_member(message), */
478 /* dbus_message_get_path(message)); */
480 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
481 set_remove(m->bus_connections, connection);
482 set_remove(m->bus_connections_for_dispatch, connection);
483 dbus_connection_unref(connection);
486 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
489 unsigned bus_dispatch(Manager *m) {
494 if (m->queued_message) {
495 /* If we cannot get rid of this message we won't
496 * dispatch any D-Bus messages, so that we won't end
497 * up wanting to queue another message. */
500 if (!dbus_connection_send(m->api_bus, m->queued_message, NULL))
503 dbus_message_unref(m->queued_message);
504 m->queued_message = 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_debug("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_debug("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 create 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 dbus_connection_set_dispatch_status_function(c, NULL, NULL, NULL);
995 dbus_connection_flush(c);
996 dbus_connection_close(c);
997 dbus_connection_unref(c);
1000 static void bus_done_api(Manager *m) {
1004 if (m->system_bus == m->api_bus)
1005 m->system_bus = NULL;
1007 shutdown_connection(m, m->api_bus);
1012 if (m->queued_message) {
1013 dbus_message_unref(m->queued_message);
1014 m->queued_message = NULL;
1018 static void bus_done_system(Manager *m) {
1021 if (m->system_bus == m->api_bus)
1024 if (m->system_bus) {
1025 shutdown_connection(m, m->system_bus);
1026 m->system_bus = NULL;
1030 static void bus_done_private(Manager *m) {
1032 if (m->private_bus) {
1033 dbus_server_disconnect(m->private_bus);
1034 dbus_server_unref(m->private_bus);
1035 m->private_bus = NULL;
1039 void bus_done(Manager *m) {
1044 bus_done_private(m);
1046 while ((c = set_steal_first(m->bus_connections)))
1047 shutdown_connection(m, c);
1049 while ((c = set_steal_first(m->bus_connections_for_dispatch)))
1050 shutdown_connection(m, c);
1052 set_free(m->bus_connections);
1053 set_free(m->bus_connections_for_dispatch);
1055 if (m->name_data_slot >= 0)
1056 dbus_pending_call_free_data_slot(&m->name_data_slot);
1058 if (m->subscribed_data_slot >= 0)
1059 dbus_pending_call_free_data_slot(&m->subscribed_data_slot);
1062 static void query_pid_pending_cb(DBusPendingCall *pending, void *userdata) {
1063 Manager *m = userdata;
1068 dbus_error_init(&error);
1070 assert_se(name = BUS_PENDING_CALL_NAME(m, pending));
1071 assert_se(reply = dbus_pending_call_steal_reply(pending));
1073 switch (dbus_message_get_type(reply)) {
1075 case DBUS_MESSAGE_TYPE_ERROR:
1077 assert_se(dbus_set_error_from_message(&error, reply));
1078 log_warning("GetConnectionUnixProcessID() failed: %s", error.message);
1081 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
1084 if (!dbus_message_get_args(reply,
1086 DBUS_TYPE_UINT32, &r,
1087 DBUS_TYPE_INVALID)) {
1088 log_error("Failed to parse GetConnectionUnixProcessID() reply: %s", error.message);
1092 manager_dispatch_bus_query_pid_done(m, name, (pid_t) r);
1097 assert_not_reached("Invalid reply message");
1100 dbus_message_unref(reply);
1101 dbus_error_free(&error);
1104 int bus_query_pid(Manager *m, const char *name) {
1105 DBusMessage *message = NULL;
1106 DBusPendingCall *pending = NULL;
1112 if (!(message = dbus_message_new_method_call(
1115 DBUS_INTERFACE_DBUS,
1116 "GetConnectionUnixProcessID")))
1119 if (!(dbus_message_append_args(
1121 DBUS_TYPE_STRING, &name,
1122 DBUS_TYPE_INVALID)))
1125 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
1128 if (!(n = strdup(name)))
1131 if (!dbus_pending_call_set_data(pending, m->name_data_slot, n, free))
1136 if (!dbus_pending_call_set_notify(pending, query_pid_pending_cb, m, NULL))
1139 dbus_message_unref(message);
1140 dbus_pending_call_unref(pending);
1148 dbus_pending_call_cancel(pending);
1149 dbus_pending_call_unref(pending);
1153 dbus_message_unref(message);
1158 DBusHandlerResult bus_default_message_handler(Manager *m, DBusConnection *c, DBusMessage *message, const char*introspection, const BusProperty *properties) {
1160 DBusMessage *reply = NULL;
1166 dbus_error_init(&error);
1168 if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect") && introspection) {
1170 if (!(reply = dbus_message_new_method_return(message)))
1173 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID))
1176 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Get") && properties) {
1177 const char *interface, *property;
1178 const BusProperty *p;
1180 if (!dbus_message_get_args(
1183 DBUS_TYPE_STRING, &interface,
1184 DBUS_TYPE_STRING, &property,
1186 return bus_send_error_reply(m, c, message, &error, -EINVAL);
1188 for (p = properties; p->property; p++)
1189 if (streq(p->interface, interface) && streq(p->property, property))
1193 DBusMessageIter iter, sub;
1195 if (!(reply = dbus_message_new_method_return(message)))
1198 dbus_message_iter_init_append(reply, &iter);
1200 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, p->signature, &sub))
1203 if ((r = p->append(m, &sub, property, (void*) p->data)) < 0) {
1208 dbus_message_unref(reply);
1209 return bus_send_error_reply(m, c, message, NULL, r);
1212 if (!dbus_message_iter_close_container(&iter, &sub))
1215 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "GetAll") && properties) {
1216 const char *interface;
1217 const BusProperty *p;
1218 DBusMessageIter iter, sub, sub2, sub3;
1220 if (!dbus_message_get_args(
1223 DBUS_TYPE_STRING, &interface,
1225 return bus_send_error_reply(m, c, message, &error, -EINVAL);
1227 if (!(reply = dbus_message_new_method_return(message)))
1230 dbus_message_iter_init_append(reply, &iter);
1232 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub))
1235 for (p = properties; p->property; p++) {
1236 if (interface[0] && !streq(p->interface, interface))
1239 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, NULL, &sub2) ||
1240 !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &p->property) ||
1241 !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, p->signature, &sub3))
1244 if ((r = p->append(m, &sub3, p->property, (void*) p->data)) < 0) {
1249 dbus_message_unref(reply);
1250 return bus_send_error_reply(m, c, message, NULL, r);
1253 if (!dbus_message_iter_close_container(&sub2, &sub3) ||
1254 !dbus_message_iter_close_container(&sub, &sub2))
1258 if (!dbus_message_iter_close_container(&iter, &sub))
1263 if (!dbus_connection_send(c, reply, NULL))
1266 dbus_message_unref(reply);
1267 return DBUS_HANDLER_RESULT_HANDLED;
1270 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1274 dbus_message_unref(reply);
1276 dbus_error_free(&error);
1278 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1281 static const char *error_to_dbus(int error) {
1286 return DBUS_ERROR_INVALID_ARGS;
1289 return DBUS_ERROR_NO_MEMORY;
1293 return DBUS_ERROR_ACCESS_DENIED;
1296 return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN;
1299 return DBUS_ERROR_FILE_NOT_FOUND;
1302 return DBUS_ERROR_FILE_EXISTS;
1305 return DBUS_ERROR_TIMEOUT;
1308 return DBUS_ERROR_IO_ERROR;
1313 return DBUS_ERROR_DISCONNECTED;
1316 return DBUS_ERROR_FAILED;
1319 DBusHandlerResult bus_send_error_reply(Manager *m, DBusConnection *c, DBusMessage *message, DBusError *bus_error, int error) {
1320 DBusMessage *reply = NULL;
1321 const char *name, *text;
1323 if (bus_error && dbus_error_is_set(bus_error)) {
1324 name = bus_error->name;
1325 text = bus_error->message;
1327 name = error_to_dbus(error);
1328 text = strerror(-error);
1331 if (!(reply = dbus_message_new_error(message, name, text)))
1334 if (!dbus_connection_send(c, reply, NULL))
1337 dbus_message_unref(reply);
1340 dbus_error_free(bus_error);
1342 return DBUS_HANDLER_RESULT_HANDLED;
1346 dbus_message_unref(reply);
1349 dbus_error_free(bus_error);
1351 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1354 int bus_broadcast(Manager *m, DBusMessage *message) {
1362 SET_FOREACH(c, m->bus_connections_for_dispatch, i)
1363 if (c != m->system_bus || m->running_as == MANAGER_SYSTEM)
1364 oom = !dbus_connection_send(c, message, NULL);
1366 SET_FOREACH(c, m->bus_connections, i)
1367 if (c != m->system_bus || m->running_as == MANAGER_SYSTEM)
1368 oom = !dbus_connection_send(c, message, NULL);
1370 return oom ? -ENOMEM : 0;
1373 int bus_property_append_string(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1374 const char *t = data;
1383 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
1389 int bus_property_append_strv(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1390 DBusMessageIter sub;
1397 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
1401 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, t))
1404 if (!dbus_message_iter_close_container(i, &sub))
1410 int bus_property_append_bool(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1421 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db))
1427 int bus_property_append_uint64(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1433 /* Let's ensure that pid_t is actually 64bit, and hence this
1434 * function can be used for usec_t */
1435 assert_cc(sizeof(uint64_t) == sizeof(usec_t));
1437 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, data))
1443 int bus_property_append_uint32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1449 /* Let's ensure that pid_t and mode_t is actually 32bit, and
1450 * hence this function can be used for pid_t/mode_t */
1451 assert_cc(sizeof(uint32_t) == sizeof(pid_t));
1452 assert_cc(sizeof(uint32_t) == sizeof(mode_t));
1453 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
1455 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data))
1461 int bus_property_append_int32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1467 assert_cc(sizeof(int32_t) == sizeof(int));
1469 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, data))
1475 int bus_property_append_size(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1483 u = (uint64_t) *(size_t*) data;
1485 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
1491 int bus_property_append_ul(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1499 u = (uint64_t) *(unsigned long*) data;
1501 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
1507 int bus_parse_strv(DBusMessage *m, char ***_l) {
1508 DBusMessageIter iter, sub;
1509 unsigned n = 0, i = 0;
1515 if (!dbus_message_iter_init(m, &iter) ||
1516 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
1517 dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
1520 dbus_message_iter_recurse(&iter, &sub);
1522 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1524 dbus_message_iter_next(&sub);
1527 if (!(l = new(char*, n+1)))
1530 assert_se(dbus_message_iter_init(m, &iter));
1531 dbus_message_iter_recurse(&iter, &sub);
1533 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1536 assert_se(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
1537 dbus_message_iter_get_basic(&sub, &s);
1539 if (!(l[i++] = strdup(s))) {
1544 dbus_message_iter_next(&sub);
1556 bool bus_has_subscriber(Manager *m) {
1562 SET_FOREACH(c, m->bus_connections_for_dispatch, i)
1563 if (bus_connection_has_subscriber(m, c))
1566 SET_FOREACH(c, m->bus_connections, i)
1567 if (bus_connection_has_subscriber(m, c))
1573 bool bus_connection_has_subscriber(Manager *m, DBusConnection *c) {
1577 return !set_isempty(BUS_CONNECTION_SUBSCRIBED(m, c));