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);
74 static void shutdown_connection(Manager *m, DBusConnection *c);
76 static void bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) {
82 /* We maintain two sets, one for those connections where we
83 * requested a dispatch, and another where we didn't. And then,
84 * we move the connections between the two sets. */
86 if (status == DBUS_DISPATCH_COMPLETE)
87 set_move_one(m->bus_connections, m->bus_connections_for_dispatch, bus);
89 set_move_one(m->bus_connections_for_dispatch, m->bus_connections, bus);
92 static uint32_t bus_flags_to_events(DBusWatch *bus_watch) {
98 /* no watch flags for disabled watches */
99 if (!dbus_watch_get_enabled(bus_watch))
102 flags = dbus_watch_get_flags(bus_watch);
104 if (flags & DBUS_WATCH_READABLE)
106 if (flags & DBUS_WATCH_WRITABLE)
109 return events | EPOLLHUP | EPOLLERR;
112 static unsigned events_to_bus_flags(uint32_t events) {
115 if (events & EPOLLIN)
116 flags |= DBUS_WATCH_READABLE;
117 if (events & EPOLLOUT)
118 flags |= DBUS_WATCH_WRITABLE;
119 if (events & EPOLLHUP)
120 flags |= DBUS_WATCH_HANGUP;
121 if (events & EPOLLERR)
122 flags |= DBUS_WATCH_ERROR;
127 void bus_watch_event(Manager *m, Watch *w, int events) {
131 /* This is called by the event loop whenever there is
132 * something happening on D-Bus' file handles. */
134 if (!dbus_watch_get_enabled(w->data.bus_watch))
137 dbus_watch_handle(w->data.bus_watch, events_to_bus_flags(events));
140 static dbus_bool_t bus_add_watch(DBusWatch *bus_watch, void *data) {
143 struct epoll_event ev;
148 if (!(w = new0(Watch, 1)))
151 w->fd = dbus_watch_get_unix_fd(bus_watch);
152 w->type = WATCH_DBUS_WATCH;
153 w->data.bus_watch = bus_watch;
156 ev.events = bus_flags_to_events(bus_watch);
159 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) {
161 if (errno != EEXIST) {
166 /* Hmm, bloody D-Bus creates multiple watches on the
167 * same fd. epoll() does not like that. As a dirty
168 * hack we simply dup() the fd and hence get a second
169 * one we can safely add to the epoll(). */
171 if ((w->fd = dup(w->fd)) < 0) {
176 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) {
178 close_nointr_nofail(w->fd);
182 w->fd_is_dupped = true;
185 dbus_watch_set_data(bus_watch, w, NULL);
190 static void bus_remove_watch(DBusWatch *bus_watch, void *data) {
197 if (!(w = dbus_watch_get_data(bus_watch)))
200 assert(w->type == WATCH_DBUS_WATCH);
201 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
204 close_nointr_nofail(w->fd);
209 static void bus_toggle_watch(DBusWatch *bus_watch, void *data) {
212 struct epoll_event ev;
217 assert_se(w = dbus_watch_get_data(bus_watch));
218 assert(w->type == WATCH_DBUS_WATCH);
221 ev.events = bus_flags_to_events(bus_watch);
224 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_MOD, w->fd, &ev) == 0);
227 static int bus_timeout_arm(Manager *m, Watch *w) {
228 struct itimerspec its;
235 if (dbus_timeout_get_enabled(w->data.bus_timeout)) {
236 timespec_store(&its.it_value, dbus_timeout_get_interval(w->data.bus_timeout) * USEC_PER_MSEC);
237 its.it_interval = its.it_interval;
240 if (timerfd_settime(w->fd, 0, &its, NULL) < 0)
246 void bus_timeout_event(Manager *m, Watch *w, int events) {
250 /* This is called by the event loop whenever there is
251 * something happening on D-Bus' file handles. */
253 if (!(dbus_timeout_get_enabled(w->data.bus_timeout)))
256 dbus_timeout_handle(w->data.bus_timeout);
259 static dbus_bool_t bus_add_timeout(DBusTimeout *timeout, void *data) {
262 struct epoll_event ev;
267 if (!(w = new0(Watch, 1)))
270 if (!(w->fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
273 w->type = WATCH_DBUS_TIMEOUT;
274 w->data.bus_timeout = timeout;
276 if (bus_timeout_arm(m, w) < 0)
283 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0)
286 dbus_timeout_set_data(timeout, w, NULL);
292 close_nointr_nofail(w->fd);
298 static void bus_remove_timeout(DBusTimeout *timeout, void *data) {
305 if (!(w = dbus_timeout_get_data(timeout)))
308 assert(w->type == WATCH_DBUS_TIMEOUT);
309 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
310 close_nointr_nofail(w->fd);
314 static void bus_toggle_timeout(DBusTimeout *timeout, void *data) {
322 assert_se(w = dbus_timeout_get_data(timeout));
323 assert(w->type == WATCH_DBUS_TIMEOUT);
325 if ((r = bus_timeout_arm(m, w)) < 0)
326 log_error("Failed to rearm timer: %s", strerror(-r));
329 static DBusHandlerResult api_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
332 DBusMessage *reply = NULL;
338 dbus_error_init(&error);
340 log_debug("Got D-Bus request: %s.%s() on %s",
341 dbus_message_get_interface(message),
342 dbus_message_get_member(message),
343 dbus_message_get_path(message));
345 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
346 log_error("Warning! API D-Bus connection terminated.");
349 } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) {
350 const char *name, *old_owner, *new_owner;
352 if (!dbus_message_get_args(message, &error,
353 DBUS_TYPE_STRING, &name,
354 DBUS_TYPE_STRING, &old_owner,
355 DBUS_TYPE_STRING, &new_owner,
357 log_error("Failed to parse NameOwnerChanged message: %s", error.message);
359 if (set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) name))
360 log_debug("Subscription client vanished: %s (left: %u)", name, set_size(BUS_CONNECTION_SUBSCRIBED(m, connection)));
362 if (old_owner[0] == 0)
365 if (new_owner[0] == 0)
368 manager_dispatch_bus_name_owner_changed(m, name, old_owner, new_owner);
370 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Activator", "ActivationRequest")) {
373 if (!dbus_message_get_args(message, &error,
374 DBUS_TYPE_STRING, &name,
376 log_error("Failed to parse ActivationRequest message: %s", error.message);
381 log_debug("Got D-Bus activation request for %s", name);
383 r = manager_load_unit(m, name, NULL, &u);
385 if (r >= 0 && u->meta.only_by_dependency)
389 r = manager_add_job(m, JOB_START, u, JOB_REPLACE, true, NULL);
392 const char *id, *text;
394 log_warning("D-Bus activation failed for %s: %s", name, strerror(-r));
396 if (!(reply = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure")))
399 id = error_to_dbus(r);
402 if (!dbus_message_set_destination(reply, DBUS_SERVICE_DBUS) ||
403 !dbus_message_append_args(reply,
404 DBUS_TYPE_STRING, &name,
405 DBUS_TYPE_STRING, &id,
406 DBUS_TYPE_STRING, &text,
411 /* On success we don't do anything, the service will be spwaned now */
415 dbus_error_free(&error);
418 if (!dbus_connection_send(connection, reply, NULL))
421 dbus_message_unref(reply);
424 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
428 dbus_message_unref(reply);
430 dbus_error_free(&error);
432 return DBUS_HANDLER_RESULT_NEED_MEMORY;
435 static DBusHandlerResult system_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
443 dbus_error_init(&error);
445 log_debug("Got D-Bus request: %s.%s() on %s",
446 dbus_message_get_interface(message),
447 dbus_message_get_member(message),
448 dbus_message_get_path(message));
450 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
451 log_error("Warning! System D-Bus connection terminated.");
454 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
457 if (!dbus_message_get_args(message, &error,
458 DBUS_TYPE_STRING, &cgroup,
460 log_error("Failed to parse Released message: %s", error.message);
462 cgroup_notify_empty(m, cgroup);
465 dbus_error_free(&error);
466 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
469 static DBusHandlerResult private_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
476 log_debug("Got D-Bus request: %s.%s() on %s",
477 dbus_message_get_interface(message),
478 dbus_message_get_member(message),
479 dbus_message_get_path(message));
481 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected"))
482 shutdown_connection(m, connection);
484 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
487 unsigned bus_dispatch(Manager *m) {
492 if (m->queued_message) {
493 /* If we cannot get rid of this message we won't
494 * dispatch any D-Bus messages, so that we won't end
495 * up wanting to queue another message. */
497 if (m->queued_message_connection)
498 if (!dbus_connection_send(m->queued_message_connection, m->queued_message, NULL))
501 dbus_message_unref(m->queued_message);
502 m->queued_message = NULL;
503 m->queued_message_connection = NULL;
506 if ((c = set_first(m->bus_connections_for_dispatch))) {
507 if (dbus_connection_dispatch(c) == DBUS_DISPATCH_COMPLETE)
508 set_move_one(m->bus_connections, m->bus_connections_for_dispatch, c);
516 static void request_name_pending_cb(DBusPendingCall *pending, void *userdata) {
520 dbus_error_init(&error);
522 assert_se(reply = dbus_pending_call_steal_reply(pending));
524 switch (dbus_message_get_type(reply)) {
526 case DBUS_MESSAGE_TYPE_ERROR:
528 assert_se(dbus_set_error_from_message(&error, reply));
529 log_warning("RequestName() failed: %s", error.message);
532 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
535 if (!dbus_message_get_args(reply,
537 DBUS_TYPE_UINT32, &r,
538 DBUS_TYPE_INVALID)) {
539 log_error("Failed to parse RequestName() reply: %s", error.message);
544 log_debug("Successfully acquired name.");
546 log_error("Name already owned.");
552 assert_not_reached("Invalid reply message");
555 dbus_message_unref(reply);
556 dbus_error_free(&error);
559 static int request_name(Manager *m) {
560 const char *name = "org.freedesktop.systemd1";
562 DBusMessage *message = NULL;
563 DBusPendingCall *pending = NULL;
565 if (!(message = dbus_message_new_method_call(
572 if (!dbus_message_append_args(
574 DBUS_TYPE_STRING, &name,
575 DBUS_TYPE_UINT32, &flags,
579 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
582 if (!dbus_pending_call_set_notify(pending, request_name_pending_cb, m, NULL))
585 dbus_message_unref(message);
586 dbus_pending_call_unref(pending);
588 /* We simple ask for the name and don't wait for it. Sooner or
589 * later we'll have it. */
595 dbus_pending_call_cancel(pending);
596 dbus_pending_call_unref(pending);
600 dbus_message_unref(message);
605 static void query_name_list_pending_cb(DBusPendingCall *pending, void *userdata) {
608 Manager *m = userdata;
612 dbus_error_init(&error);
614 assert_se(reply = dbus_pending_call_steal_reply(pending));
616 switch (dbus_message_get_type(reply)) {
618 case DBUS_MESSAGE_TYPE_ERROR:
620 assert_se(dbus_set_error_from_message(&error, reply));
621 log_warning("ListNames() failed: %s", error.message);
624 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
628 if ((r = bus_parse_strv(reply, &l)) < 0)
629 log_warning("Failed to parse ListNames() reply: %s", strerror(-r));
634 /* This is a bit hacky, we say the
635 * owner of the name is the name
636 * itself, because we don't want the
637 * extra traffic to figure out the
639 manager_dispatch_bus_name_owner_changed(m, *t, NULL, *t);
648 assert_not_reached("Invalid reply message");
651 dbus_message_unref(reply);
652 dbus_error_free(&error);
655 static int query_name_list(Manager *m) {
656 DBusMessage *message = NULL;
657 DBusPendingCall *pending = NULL;
659 /* Asks for the currently installed bus names */
661 if (!(message = dbus_message_new_method_call(
668 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
671 if (!dbus_pending_call_set_notify(pending, query_name_list_pending_cb, m, NULL))
674 dbus_message_unref(message);
675 dbus_pending_call_unref(pending);
677 /* We simple ask for the list and don't wait for it. Sooner or
678 * later we'll get it. */
684 dbus_pending_call_cancel(pending);
685 dbus_pending_call_unref(pending);
689 dbus_message_unref(message);
694 static int bus_setup_loop(Manager *m, DBusConnection *bus) {
698 dbus_connection_set_exit_on_disconnect(bus, FALSE);
700 if (!dbus_connection_set_watch_functions(bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
701 !dbus_connection_set_timeout_functions(bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) {
702 log_error("Not enough memory");
706 if (set_put(m->bus_connections_for_dispatch, bus) < 0) {
707 log_error("Not enough memory");
711 dbus_connection_set_dispatch_status_function(bus, bus_dispatch_status, m, NULL);
715 static dbus_bool_t allow_only_root(DBusConnection *connection, unsigned long uid, void *data) {
719 static void bus_new_connection(
721 DBusConnection *new_connection,
728 if (set_size(m->bus_connections) >= CONNECTIONS_MAX) {
729 log_error("Too many concurrent connections.");
733 dbus_connection_set_unix_user_function(new_connection, allow_only_root, NULL, NULL);
735 if (bus_setup_loop(m, new_connection) < 0)
738 if (!dbus_connection_register_object_path(new_connection, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
739 !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
740 !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
741 !dbus_connection_add_filter(new_connection, private_bus_message_filter, m, NULL)) {
742 log_error("Not enough memory.");
746 log_debug("Accepted connection on private bus.");
748 dbus_connection_ref(new_connection);
751 static int bus_init_system(Manager *m) {
758 dbus_error_init(&error);
763 if (m->running_as == MANAGER_SYSTEM && m->api_bus)
764 m->system_bus = m->api_bus;
766 if (!(m->system_bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error))) {
767 log_debug("Failed to get system D-Bus connection, retrying later: %s", error.message);
772 if ((r = bus_setup_loop(m, m->system_bus)) < 0)
776 if (!dbus_connection_add_filter(m->system_bus, system_bus_message_filter, m, NULL)) {
777 log_error("Not enough memory");
782 dbus_bus_add_match(m->system_bus,
784 "interface='org.freedesktop.systemd1.Agent',"
786 "path='/org/freedesktop/systemd1/agent'",
789 if (dbus_error_is_set(&error)) {
790 log_error("Failed to register match: %s", error.message);
795 log_info("Successfully connected to system D-Bus bus %s as %s",
796 strnull((id = dbus_connection_get_server_id(m->system_bus))),
797 strnull(dbus_bus_get_unique_name(m->system_bus)));
804 dbus_error_free(&error);
809 static int bus_init_api(Manager *m) {
816 dbus_error_init(&error);
821 if (m->running_as == MANAGER_SYSTEM && m->system_bus)
822 m->api_bus = m->system_bus;
824 if (!(m->api_bus = dbus_bus_get_private(m->running_as == MANAGER_SESSION ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error))) {
825 log_debug("Failed to get API D-Bus connection, retrying later: %s", error.message);
830 if ((r = bus_setup_loop(m, m->api_bus)) < 0)
834 if (!dbus_connection_register_object_path(m->api_bus, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
835 !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
836 !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
837 !dbus_connection_add_filter(m->api_bus, api_bus_message_filter, m, NULL)) {
838 log_error("Not enough memory");
843 /* Get NameOwnerChange messages */
844 dbus_bus_add_match(m->api_bus,
846 "sender='"DBUS_SERVICE_DBUS"',"
847 "interface='"DBUS_INTERFACE_DBUS"',"
848 "member='NameOwnerChanged',"
849 "path='"DBUS_PATH_DBUS"'",
852 if (dbus_error_is_set(&error)) {
853 log_error("Failed to register match: %s", error.message);
858 /* Get activation requests */
859 dbus_bus_add_match(m->api_bus,
861 "sender='"DBUS_SERVICE_DBUS"',"
862 "interface='org.freedesktop.systemd1.Activator',"
863 "member='ActivationRequest',"
864 "path='"DBUS_PATH_DBUS"'",
867 if (dbus_error_is_set(&error)) {
868 log_error("Failed to register match: %s", error.message);
873 if ((r = request_name(m)) < 0)
876 if ((r = query_name_list(m)) < 0)
879 log_info("Successfully connected to API D-Bus bus %s as %s",
880 strnull((id = dbus_connection_get_server_id(m->api_bus))),
881 strnull(dbus_bus_get_unique_name(m->api_bus)));
888 dbus_error_free(&error);
893 static int bus_init_private(Manager *m) {
896 const char *const external_only[] = {
903 dbus_error_init(&error);
908 /* We want the private bus only when running as init */
909 if (m->running_as != MANAGER_SYSTEM)
912 if (!(m->private_bus = dbus_server_listen("unix:abstract=/org/freedesktop/systemd1/private", &error))) {
913 log_error("Failed to create private D-Bus server: %s", error.message);
918 if (!dbus_server_set_auth_mechanisms(m->private_bus, (const char**) external_only) ||
919 !dbus_server_set_watch_functions(m->private_bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
920 !dbus_server_set_timeout_functions(m->private_bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) {
921 log_error("Not enough memory");
926 dbus_server_set_new_connection_function(m->private_bus, bus_new_connection, m, NULL);
928 log_debug("Successfully created private D-Bus server.");
934 dbus_error_free(&error);
939 int bus_init(Manager *m) {
942 if (set_ensure_allocated(&m->bus_connections, trivial_hash_func, trivial_compare_func) < 0 ||
943 set_ensure_allocated(&m->bus_connections_for_dispatch, trivial_hash_func, trivial_compare_func) < 0) {
944 log_error("Not enough memory");
948 if (m->name_data_slot < 0)
949 if (!dbus_pending_call_allocate_data_slot(&m->name_data_slot)) {
950 log_error("Not enough memory");
954 if (m->subscribed_data_slot < 0)
955 if (!dbus_pending_call_allocate_data_slot(&m->subscribed_data_slot)) {
956 log_error("Not enough memory");
960 if ((r = bus_init_system(m)) < 0 ||
961 (r = bus_init_api(m)) < 0 ||
962 (r = bus_init_private(m)) < 0)
968 static void shutdown_connection(Manager *m, DBusConnection *c) {
973 HASHMAP_FOREACH(j, m->jobs, i)
976 j->bus_client = NULL;
981 set_remove(m->bus_connections, c);
982 set_remove(m->bus_connections_for_dispatch, c);
984 if ((s = BUS_CONNECTION_SUBSCRIBED(m, c))) {
987 while ((t = set_steal_first(s)))
993 if (m->queued_message_connection == c) {
994 m->queued_message_connection = NULL;
996 if (m->queued_message) {
997 dbus_message_unref(m->queued_message);
998 m->queued_message = NULL;
1002 dbus_connection_set_dispatch_status_function(c, NULL, NULL, NULL);
1003 dbus_connection_flush(c);
1004 dbus_connection_close(c);
1005 dbus_connection_unref(c);
1008 static void bus_done_api(Manager *m) {
1012 if (m->system_bus == m->api_bus)
1013 m->system_bus = NULL;
1015 shutdown_connection(m, m->api_bus);
1020 if (m->queued_message) {
1021 dbus_message_unref(m->queued_message);
1022 m->queued_message = NULL;
1026 static void bus_done_system(Manager *m) {
1029 if (m->system_bus == m->api_bus)
1032 if (m->system_bus) {
1033 shutdown_connection(m, m->system_bus);
1034 m->system_bus = NULL;
1038 static void bus_done_private(Manager *m) {
1040 if (m->private_bus) {
1041 dbus_server_disconnect(m->private_bus);
1042 dbus_server_unref(m->private_bus);
1043 m->private_bus = NULL;
1047 void bus_done(Manager *m) {
1052 bus_done_private(m);
1054 while ((c = set_steal_first(m->bus_connections)))
1055 shutdown_connection(m, c);
1057 while ((c = set_steal_first(m->bus_connections_for_dispatch)))
1058 shutdown_connection(m, c);
1060 set_free(m->bus_connections);
1061 set_free(m->bus_connections_for_dispatch);
1063 if (m->name_data_slot >= 0)
1064 dbus_pending_call_free_data_slot(&m->name_data_slot);
1066 if (m->subscribed_data_slot >= 0)
1067 dbus_pending_call_free_data_slot(&m->subscribed_data_slot);
1070 static void query_pid_pending_cb(DBusPendingCall *pending, void *userdata) {
1071 Manager *m = userdata;
1076 dbus_error_init(&error);
1078 assert_se(name = BUS_PENDING_CALL_NAME(m, pending));
1079 assert_se(reply = dbus_pending_call_steal_reply(pending));
1081 switch (dbus_message_get_type(reply)) {
1083 case DBUS_MESSAGE_TYPE_ERROR:
1085 assert_se(dbus_set_error_from_message(&error, reply));
1086 log_warning("GetConnectionUnixProcessID() failed: %s", error.message);
1089 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
1092 if (!dbus_message_get_args(reply,
1094 DBUS_TYPE_UINT32, &r,
1095 DBUS_TYPE_INVALID)) {
1096 log_error("Failed to parse GetConnectionUnixProcessID() reply: %s", error.message);
1100 manager_dispatch_bus_query_pid_done(m, name, (pid_t) r);
1105 assert_not_reached("Invalid reply message");
1108 dbus_message_unref(reply);
1109 dbus_error_free(&error);
1112 int bus_query_pid(Manager *m, const char *name) {
1113 DBusMessage *message = NULL;
1114 DBusPendingCall *pending = NULL;
1120 if (!(message = dbus_message_new_method_call(
1123 DBUS_INTERFACE_DBUS,
1124 "GetConnectionUnixProcessID")))
1127 if (!(dbus_message_append_args(
1129 DBUS_TYPE_STRING, &name,
1130 DBUS_TYPE_INVALID)))
1133 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
1136 if (!(n = strdup(name)))
1139 if (!dbus_pending_call_set_data(pending, m->name_data_slot, n, free))
1144 if (!dbus_pending_call_set_notify(pending, query_pid_pending_cb, m, NULL))
1147 dbus_message_unref(message);
1148 dbus_pending_call_unref(pending);
1156 dbus_pending_call_cancel(pending);
1157 dbus_pending_call_unref(pending);
1161 dbus_message_unref(message);
1166 DBusHandlerResult bus_default_message_handler(Manager *m, DBusConnection *c, DBusMessage *message, const char*introspection, const BusProperty *properties) {
1168 DBusMessage *reply = NULL;
1174 dbus_error_init(&error);
1176 if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect") && introspection) {
1178 if (!(reply = dbus_message_new_method_return(message)))
1181 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID))
1184 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Get") && properties) {
1185 const char *interface, *property;
1186 const BusProperty *p;
1188 if (!dbus_message_get_args(
1191 DBUS_TYPE_STRING, &interface,
1192 DBUS_TYPE_STRING, &property,
1194 return bus_send_error_reply(m, c, message, &error, -EINVAL);
1196 for (p = properties; p->property; p++)
1197 if (streq(p->interface, interface) && streq(p->property, property))
1201 DBusMessageIter iter, sub;
1203 if (!(reply = dbus_message_new_method_return(message)))
1206 dbus_message_iter_init_append(reply, &iter);
1208 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, p->signature, &sub))
1211 if ((r = p->append(m, &sub, property, (void*) p->data)) < 0) {
1216 dbus_message_unref(reply);
1217 return bus_send_error_reply(m, c, message, NULL, r);
1220 if (!dbus_message_iter_close_container(&iter, &sub))
1223 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "GetAll") && properties) {
1224 const char *interface;
1225 const BusProperty *p;
1226 DBusMessageIter iter, sub, sub2, sub3;
1228 if (!dbus_message_get_args(
1231 DBUS_TYPE_STRING, &interface,
1233 return bus_send_error_reply(m, c, message, &error, -EINVAL);
1235 if (!(reply = dbus_message_new_method_return(message)))
1238 dbus_message_iter_init_append(reply, &iter);
1240 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub))
1243 for (p = properties; p->property; p++) {
1244 if (interface[0] && !streq(p->interface, interface))
1247 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, NULL, &sub2) ||
1248 !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &p->property) ||
1249 !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, p->signature, &sub3))
1252 if ((r = p->append(m, &sub3, p->property, (void*) p->data)) < 0) {
1257 dbus_message_unref(reply);
1258 return bus_send_error_reply(m, c, message, NULL, r);
1261 if (!dbus_message_iter_close_container(&sub2, &sub3) ||
1262 !dbus_message_iter_close_container(&sub, &sub2))
1266 if (!dbus_message_iter_close_container(&iter, &sub))
1271 if (!dbus_connection_send(c, reply, NULL))
1274 dbus_message_unref(reply);
1275 return DBUS_HANDLER_RESULT_HANDLED;
1278 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1282 dbus_message_unref(reply);
1284 dbus_error_free(&error);
1286 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1289 static const char *error_to_dbus(int error) {
1294 return DBUS_ERROR_INVALID_ARGS;
1297 return DBUS_ERROR_NO_MEMORY;
1301 return DBUS_ERROR_ACCESS_DENIED;
1304 return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN;
1307 return DBUS_ERROR_FILE_NOT_FOUND;
1310 return DBUS_ERROR_FILE_EXISTS;
1313 return DBUS_ERROR_TIMEOUT;
1316 return DBUS_ERROR_IO_ERROR;
1321 return DBUS_ERROR_DISCONNECTED;
1324 return DBUS_ERROR_FAILED;
1327 DBusHandlerResult bus_send_error_reply(Manager *m, DBusConnection *c, DBusMessage *message, DBusError *bus_error, int error) {
1328 DBusMessage *reply = NULL;
1329 const char *name, *text;
1331 if (bus_error && dbus_error_is_set(bus_error)) {
1332 name = bus_error->name;
1333 text = bus_error->message;
1335 name = error_to_dbus(error);
1336 text = strerror(-error);
1339 if (!(reply = dbus_message_new_error(message, name, text)))
1342 if (!dbus_connection_send(c, reply, NULL))
1345 dbus_message_unref(reply);
1348 dbus_error_free(bus_error);
1350 return DBUS_HANDLER_RESULT_HANDLED;
1354 dbus_message_unref(reply);
1357 dbus_error_free(bus_error);
1359 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1362 int bus_broadcast(Manager *m, DBusMessage *message) {
1370 SET_FOREACH(c, m->bus_connections_for_dispatch, i)
1371 if (c != m->system_bus || m->running_as == MANAGER_SYSTEM)
1372 oom = !dbus_connection_send(c, message, NULL);
1374 SET_FOREACH(c, m->bus_connections, i)
1375 if (c != m->system_bus || m->running_as == MANAGER_SYSTEM)
1376 oom = !dbus_connection_send(c, message, NULL);
1378 return oom ? -ENOMEM : 0;
1381 int bus_property_append_string(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1382 const char *t = data;
1391 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
1397 int bus_property_append_strv(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1398 DBusMessageIter sub;
1405 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
1409 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, t))
1412 if (!dbus_message_iter_close_container(i, &sub))
1418 int bus_property_append_bool(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1429 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db))
1435 int bus_property_append_uint64(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1441 /* Let's ensure that pid_t is actually 64bit, and hence this
1442 * function can be used for usec_t */
1443 assert_cc(sizeof(uint64_t) == sizeof(usec_t));
1445 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, data))
1451 int bus_property_append_uint32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1457 /* Let's ensure that pid_t and mode_t is actually 32bit, and
1458 * hence this function can be used for pid_t/mode_t */
1459 assert_cc(sizeof(uint32_t) == sizeof(pid_t));
1460 assert_cc(sizeof(uint32_t) == sizeof(mode_t));
1461 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
1463 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data))
1469 int bus_property_append_int32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1475 assert_cc(sizeof(int32_t) == sizeof(int));
1477 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, data))
1483 int bus_property_append_size(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1491 u = (uint64_t) *(size_t*) data;
1493 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
1499 int bus_property_append_ul(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1507 u = (uint64_t) *(unsigned long*) data;
1509 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
1515 int bus_parse_strv(DBusMessage *m, char ***_l) {
1516 DBusMessageIter iter, sub;
1517 unsigned n = 0, i = 0;
1523 if (!dbus_message_iter_init(m, &iter) ||
1524 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
1525 dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
1528 dbus_message_iter_recurse(&iter, &sub);
1530 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1532 dbus_message_iter_next(&sub);
1535 if (!(l = new(char*, n+1)))
1538 assert_se(dbus_message_iter_init(m, &iter));
1539 dbus_message_iter_recurse(&iter, &sub);
1541 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1544 assert_se(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
1545 dbus_message_iter_get_basic(&sub, &s);
1547 if (!(l[i++] = strdup(s))) {
1552 dbus_message_iter_next(&sub);
1564 bool bus_has_subscriber(Manager *m) {
1570 SET_FOREACH(c, m->bus_connections_for_dispatch, i)
1571 if (bus_connection_has_subscriber(m, c))
1574 SET_FOREACH(c, m->bus_connections, i)
1575 if (bus_connection_has_subscriber(m, c))
1581 bool bus_connection_has_subscriber(Manager *m, DBusConnection *c) {
1585 return !set_isempty(BUS_CONNECTION_SUBSCRIBED(m, c));