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 static const char bus_properties_interface[] = BUS_PROPERTIES_INTERFACE;
47 static const char bus_introspectable_interface[] = BUS_INTROSPECTABLE_INTERFACE;
49 const char *const bus_interface_table[] = {
50 "org.freedesktop.DBus.Properties", bus_properties_interface,
51 "org.freedesktop.DBus.Introspectable", bus_introspectable_interface,
52 "org.freedesktop.systemd1.Manager", bus_manager_interface,
53 "org.freedesktop.systemd1.Job", bus_job_interface,
54 "org.freedesktop.systemd1.Unit", bus_unit_interface,
55 "org.freedesktop.systemd1.Service", bus_service_interface,
56 "org.freedesktop.systemd1.Socket", bus_socket_interface,
57 "org.freedesktop.systemd1.Target", bus_target_interface,
58 "org.freedesktop.systemd1.Device", bus_device_interface,
59 "org.freedesktop.systemd1.Mount", bus_mount_interface,
60 "org.freedesktop.systemd1.Automount", bus_automount_interface,
61 "org.freedesktop.systemd1.Snapshot", bus_snapshot_interface,
62 "org.freedesktop.systemd1.Swap", bus_swap_interface,
63 "org.freedesktop.systemd1.Timer", bus_timer_interface,
64 "org.freedesktop.systemd1.Path", bus_path_interface,
68 static const char *error_to_dbus(int error);
70 static void api_bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) {
79 assert(m->api_bus == bus);
81 m->request_api_bus_dispatch = status != DBUS_DISPATCH_COMPLETE;
84 static void system_bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) {
93 assert(m->system_bus == bus);
95 m->request_system_bus_dispatch = status != DBUS_DISPATCH_COMPLETE;
98 static uint32_t bus_flags_to_events(DBusWatch *bus_watch) {
104 /* no watch flags for disabled watches */
105 if (!dbus_watch_get_enabled(bus_watch))
108 flags = dbus_watch_get_flags(bus_watch);
110 if (flags & DBUS_WATCH_READABLE)
112 if (flags & DBUS_WATCH_WRITABLE)
115 return events | EPOLLHUP | EPOLLERR;
118 static unsigned events_to_bus_flags(uint32_t events) {
121 if (events & EPOLLIN)
122 flags |= DBUS_WATCH_READABLE;
123 if (events & EPOLLOUT)
124 flags |= DBUS_WATCH_WRITABLE;
125 if (events & EPOLLHUP)
126 flags |= DBUS_WATCH_HANGUP;
127 if (events & EPOLLERR)
128 flags |= DBUS_WATCH_ERROR;
133 void bus_watch_event(Manager *m, Watch *w, int events) {
137 /* This is called by the event loop whenever there is
138 * something happening on D-Bus' file handles. */
140 if (!dbus_watch_get_enabled(w->data.bus_watch))
143 dbus_watch_handle(w->data.bus_watch, events_to_bus_flags(events));
146 static dbus_bool_t bus_add_watch(DBusWatch *bus_watch, void *data) {
149 struct epoll_event ev;
154 if (!(w = new0(Watch, 1)))
157 w->fd = dbus_watch_get_unix_fd(bus_watch);
158 w->type = WATCH_DBUS_WATCH;
159 w->data.bus_watch = bus_watch;
162 ev.events = bus_flags_to_events(bus_watch);
165 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) {
167 if (errno != EEXIST) {
172 /* Hmm, bloody D-Bus creates multiple watches on the
173 * same fd. epoll() does not like that. As a dirty
174 * hack we simply dup() the fd and hence get a second
175 * one we can safely add to the epoll(). */
177 if ((w->fd = dup(w->fd)) < 0) {
182 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) {
184 close_nointr_nofail(w->fd);
188 w->fd_is_dupped = true;
191 dbus_watch_set_data(bus_watch, w, NULL);
196 static void bus_remove_watch(DBusWatch *bus_watch, void *data) {
203 if (!(w = dbus_watch_get_data(bus_watch)))
206 assert(w->type == WATCH_DBUS_WATCH);
207 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
210 close_nointr_nofail(w->fd);
215 static void bus_toggle_watch(DBusWatch *bus_watch, void *data) {
218 struct epoll_event ev;
223 assert_se(w = dbus_watch_get_data(bus_watch));
224 assert(w->type == WATCH_DBUS_WATCH);
227 ev.events = bus_flags_to_events(bus_watch);
230 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_MOD, w->fd, &ev) == 0);
233 static int bus_timeout_arm(Manager *m, Watch *w) {
234 struct itimerspec its;
241 if (dbus_timeout_get_enabled(w->data.bus_timeout)) {
242 timespec_store(&its.it_value, dbus_timeout_get_interval(w->data.bus_timeout) * USEC_PER_MSEC);
243 its.it_interval = its.it_interval;
246 if (timerfd_settime(w->fd, 0, &its, NULL) < 0)
252 void bus_timeout_event(Manager *m, Watch *w, int events) {
256 /* This is called by the event loop whenever there is
257 * something happening on D-Bus' file handles. */
259 if (!(dbus_timeout_get_enabled(w->data.bus_timeout)))
262 dbus_timeout_handle(w->data.bus_timeout);
265 static dbus_bool_t bus_add_timeout(DBusTimeout *timeout, void *data) {
268 struct epoll_event ev;
273 if (!(w = new0(Watch, 1)))
276 if (!(w->fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
279 w->type = WATCH_DBUS_TIMEOUT;
280 w->data.bus_timeout = timeout;
282 if (bus_timeout_arm(m, w) < 0)
289 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0)
292 dbus_timeout_set_data(timeout, w, NULL);
298 close_nointr_nofail(w->fd);
304 static void bus_remove_timeout(DBusTimeout *timeout, void *data) {
311 if (!(w = dbus_timeout_get_data(timeout)))
314 assert(w->type == WATCH_DBUS_TIMEOUT);
315 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
316 close_nointr_nofail(w->fd);
320 static void bus_toggle_timeout(DBusTimeout *timeout, void *data) {
328 assert_se(w = dbus_timeout_get_data(timeout));
329 assert(w->type == WATCH_DBUS_TIMEOUT);
331 if ((r = bus_timeout_arm(m, w)) < 0)
332 log_error("Failed to rearm timer: %s", strerror(-r));
335 static DBusHandlerResult api_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
338 DBusMessage *reply = NULL;
344 dbus_error_init(&error);
346 /* log_debug("Got D-Bus request: %s.%s() on %s", */
347 /* dbus_message_get_interface(message), */
348 /* dbus_message_get_member(message), */
349 /* dbus_message_get_path(message)); */
351 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
352 log_error("Warning! API D-Bus connection terminated.");
355 } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) {
356 const char *name, *old_owner, *new_owner;
358 if (!dbus_message_get_args(message, &error,
359 DBUS_TYPE_STRING, &name,
360 DBUS_TYPE_STRING, &old_owner,
361 DBUS_TYPE_STRING, &new_owner,
363 log_error("Failed to parse NameOwnerChanged message: %s", error.message);
365 if (set_remove(m->subscribed, (char*) name))
366 log_debug("Subscription client vanished: %s (left: %u)", name, set_size(m->subscribed));
368 if (old_owner[0] == 0)
371 if (new_owner[0] == 0)
374 manager_dispatch_bus_name_owner_changed(m, name, old_owner, new_owner);
376 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Activator", "ActivationRequest")) {
379 if (!dbus_message_get_args(message, &error,
380 DBUS_TYPE_STRING, &name,
382 log_error("Failed to parse ActivationRequest message: %s", error.message);
387 log_debug("Got D-Bus activation request for %s", name);
389 r = manager_load_unit(m, name, NULL, &u);
391 if (r >= 0 && u->meta.only_by_dependency)
395 r = manager_add_job(m, JOB_START, u, JOB_REPLACE, true, NULL);
398 const char *id, *text;
400 log_warning("D-Bus activation failed for %s: %s", name, strerror(-r));
402 if (!(reply = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure")))
405 id = error_to_dbus(r);
408 if (!dbus_message_set_destination(reply, DBUS_SERVICE_DBUS) ||
409 !dbus_message_append_args(reply,
410 DBUS_TYPE_STRING, &name,
411 DBUS_TYPE_STRING, &id,
412 DBUS_TYPE_STRING, &text,
417 /* On success we don't do anything, the service will be spwaned now */
421 dbus_error_free(&error);
424 if (!dbus_connection_send(connection, reply, NULL))
427 dbus_message_unref(reply);
430 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
434 dbus_message_unref(reply);
436 dbus_error_free(&error);
438 return DBUS_HANDLER_RESULT_NEED_MEMORY;
441 static DBusHandlerResult system_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
449 dbus_error_init(&error);
451 /* log_debug("Got D-Bus request: %s.%s() on %s", */
452 /* dbus_message_get_interface(message), */
453 /* dbus_message_get_member(message), */
454 /* dbus_message_get_path(message)); */
456 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
457 log_error("Warning! System D-Bus connection terminated.");
460 } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
463 if (!dbus_message_get_args(message, &error,
464 DBUS_TYPE_STRING, &cgroup,
466 log_error("Failed to parse Released message: %s", error.message);
468 cgroup_notify_empty(m, cgroup);
471 dbus_error_free(&error);
472 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
475 unsigned bus_dispatch(Manager *m) {
478 if (m->queued_message) {
479 /* If we cannot get rid of this message we won't
480 * dispatch any D-Bus messages, so that we won't end
481 * up wanting to queue another message. */
483 if (!dbus_connection_send(m->api_bus, m->queued_message, NULL))
486 dbus_message_unref(m->queued_message);
487 m->queued_message = NULL;
490 if (m->request_api_bus_dispatch) {
491 if (dbus_connection_dispatch(m->api_bus) == DBUS_DISPATCH_COMPLETE)
492 m->request_api_bus_dispatch = false;
497 if (m->request_system_bus_dispatch) {
498 if (dbus_connection_dispatch(m->system_bus) == DBUS_DISPATCH_COMPLETE)
499 m->request_system_bus_dispatch = false;
507 static void request_name_pending_cb(DBusPendingCall *pending, void *userdata) {
511 dbus_error_init(&error);
513 assert_se(reply = dbus_pending_call_steal_reply(pending));
515 switch (dbus_message_get_type(reply)) {
517 case DBUS_MESSAGE_TYPE_ERROR:
519 assert_se(dbus_set_error_from_message(&error, reply));
520 log_warning("RequestName() failed: %s", error.message);
523 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
526 if (!dbus_message_get_args(reply,
528 DBUS_TYPE_UINT32, &r,
529 DBUS_TYPE_INVALID)) {
530 log_error("Failed to parse RequestName() reply: %s", error.message);
535 log_debug("Successfully acquired name.");
537 log_error("Name already owned.");
543 assert_not_reached("Invalid reply message");
546 dbus_message_unref(reply);
547 dbus_error_free(&error);
550 static int request_name(Manager *m) {
551 const char *name = "org.freedesktop.systemd1";
553 DBusMessage *message = NULL;
554 DBusPendingCall *pending = NULL;
556 if (!(message = dbus_message_new_method_call(
563 if (!dbus_message_append_args(
565 DBUS_TYPE_STRING, &name,
566 DBUS_TYPE_UINT32, &flags,
570 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
573 if (!dbus_pending_call_set_notify(pending, request_name_pending_cb, m, NULL))
576 dbus_message_unref(message);
577 dbus_pending_call_unref(pending);
579 /* We simple ask for the name and don't wait for it. Sooner or
580 * later we'll have it. */
586 dbus_pending_call_cancel(pending);
587 dbus_pending_call_unref(pending);
591 dbus_message_unref(message);
596 static void query_name_list_pending_cb(DBusPendingCall *pending, void *userdata) {
599 Manager *m = userdata;
603 dbus_error_init(&error);
605 assert_se(reply = dbus_pending_call_steal_reply(pending));
607 switch (dbus_message_get_type(reply)) {
609 case DBUS_MESSAGE_TYPE_ERROR:
611 assert_se(dbus_set_error_from_message(&error, reply));
612 log_warning("ListNames() failed: %s", error.message);
615 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
619 if ((r = bus_parse_strv(reply, &l)) < 0)
620 log_warning("Failed to parse ListNames() reply: %s", strerror(-r));
625 /* This is a bit hacky, we say the
626 * owner of the name is the name
627 * itself, because we don't want the
628 * extra traffic to figure out the
630 manager_dispatch_bus_name_owner_changed(m, *t, NULL, *t);
639 assert_not_reached("Invalid reply message");
642 dbus_message_unref(reply);
643 dbus_error_free(&error);
646 static int query_name_list(Manager *m) {
647 DBusMessage *message = NULL;
648 DBusPendingCall *pending = NULL;
650 /* Asks for the currently installed bus names */
652 if (!(message = dbus_message_new_method_call(
659 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
662 if (!dbus_pending_call_set_notify(pending, query_name_list_pending_cb, m, NULL))
665 dbus_message_unref(message);
666 dbus_pending_call_unref(pending);
668 /* We simple ask for the list and don't wait for it. Sooner or
669 * later we'll get it. */
675 dbus_pending_call_cancel(pending);
676 dbus_pending_call_unref(pending);
680 dbus_message_unref(message);
685 static int bus_setup_loop(Manager *m, DBusConnection *bus) {
689 dbus_connection_set_exit_on_disconnect(bus, FALSE);
691 if (!dbus_connection_set_watch_functions(bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
692 !dbus_connection_set_timeout_functions(bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL))
698 int bus_init_system(Manager *m) {
705 dbus_error_init(&error);
710 if (m->running_as != MANAGER_SESSION && m->api_bus)
711 m->system_bus = m->api_bus;
713 if (!(m->system_bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error))) {
714 log_debug("Failed to get system D-Bus connection, retrying later: %s", error.message);
715 dbus_error_free(&error);
719 dbus_connection_set_dispatch_status_function(m->system_bus, system_bus_dispatch_status, m, NULL);
720 m->request_system_bus_dispatch = true;
722 if ((r = bus_setup_loop(m, m->system_bus)) < 0) {
728 if (!dbus_connection_add_filter(m->system_bus, system_bus_message_filter, m, NULL)) {
733 dbus_bus_add_match(m->system_bus,
735 "interface='org.freedesktop.systemd1.Agent',"
737 "path='/org/freedesktop/systemd1/agent'",
740 if (dbus_error_is_set(&error)) {
741 log_error("Failed to register match: %s", error.message);
742 dbus_error_free(&error);
747 log_debug("Successfully connected to system D-Bus bus %s as %s",
748 strnull((id = dbus_connection_get_server_id(m->system_bus))),
749 strnull(dbus_bus_get_unique_name(m->system_bus)));
755 int bus_init_api(Manager *m) {
762 dbus_error_init(&error);
767 if (m->name_data_slot < 0)
768 if (!dbus_pending_call_allocate_data_slot(&m->name_data_slot))
771 if (m->running_as != MANAGER_SESSION && m->system_bus)
772 m->api_bus = m->system_bus;
774 if (!(m->api_bus = dbus_bus_get_private(m->running_as == MANAGER_SESSION ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error))) {
775 log_debug("Failed to get API D-Bus connection, retrying later: %s", error.message);
776 dbus_error_free(&error);
780 dbus_connection_set_dispatch_status_function(m->api_bus, api_bus_dispatch_status, m, NULL);
781 m->request_api_bus_dispatch = true;
783 if ((r = bus_setup_loop(m, m->api_bus)) < 0) {
789 if (!dbus_connection_register_object_path(m->api_bus, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
790 !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
791 !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
792 !dbus_connection_add_filter(m->api_bus, api_bus_message_filter, m, NULL)) {
797 /* Get NameOwnerChange messages */
798 dbus_bus_add_match(m->api_bus,
800 "sender='"DBUS_SERVICE_DBUS"',"
801 "interface='"DBUS_INTERFACE_DBUS"',"
802 "member='NameOwnerChanged',"
803 "path='"DBUS_PATH_DBUS"'",
806 if (dbus_error_is_set(&error)) {
807 log_error("Failed to register match: %s", error.message);
808 dbus_error_free(&error);
813 /* Get activation requests */
814 dbus_bus_add_match(m->api_bus,
816 "sender='"DBUS_SERVICE_DBUS"',"
817 "interface='org.freedesktop.systemd1.Activator',"
818 "member='ActivationRequest',"
819 "path='"DBUS_PATH_DBUS"'",
822 if (dbus_error_is_set(&error)) {
823 log_error("Failed to register match: %s", error.message);
824 dbus_error_free(&error);
829 if ((r = request_name(m)) < 0) {
834 if ((r = query_name_list(m)) < 0) {
839 log_debug("Successfully connected to API D-Bus bus %s as %s",
840 strnull((id = dbus_connection_get_server_id(m->api_bus))),
841 strnull(dbus_bus_get_unique_name(m->api_bus)));
845 if (!(m->subscribed = set_new(string_hash_func, string_compare_func)))
851 void bus_done_api(Manager *m) {
855 if (m->system_bus == m->api_bus)
856 m->system_bus = NULL;
858 dbus_connection_set_dispatch_status_function(m->api_bus, NULL, NULL, NULL);
859 dbus_connection_flush(m->api_bus);
860 dbus_connection_close(m->api_bus);
861 dbus_connection_unref(m->api_bus);
868 while ((c = set_steal_first(m->subscribed)))
871 set_free(m->subscribed);
872 m->subscribed = NULL;
875 if (m->name_data_slot >= 0)
876 dbus_pending_call_free_data_slot(&m->name_data_slot);
878 if (m->queued_message) {
879 dbus_message_unref(m->queued_message);
880 m->queued_message = NULL;
884 void bus_done_system(Manager *m) {
887 if (m->system_bus == m->api_bus)
891 dbus_connection_set_dispatch_status_function(m->system_bus, NULL, NULL, NULL);
892 dbus_connection_flush(m->system_bus);
893 dbus_connection_close(m->system_bus);
894 dbus_connection_unref(m->system_bus);
895 m->system_bus = NULL;
899 static void query_pid_pending_cb(DBusPendingCall *pending, void *userdata) {
900 Manager *m = userdata;
905 dbus_error_init(&error);
907 assert_se(name = dbus_pending_call_get_data(pending, m->name_data_slot));
908 assert_se(reply = dbus_pending_call_steal_reply(pending));
910 switch (dbus_message_get_type(reply)) {
912 case DBUS_MESSAGE_TYPE_ERROR:
914 assert_se(dbus_set_error_from_message(&error, reply));
915 log_warning("GetConnectionUnixProcessID() failed: %s", error.message);
918 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
921 if (!dbus_message_get_args(reply,
923 DBUS_TYPE_UINT32, &r,
924 DBUS_TYPE_INVALID)) {
925 log_error("Failed to parse GetConnectionUnixProcessID() reply: %s", error.message);
929 manager_dispatch_bus_query_pid_done(m, name, (pid_t) r);
934 assert_not_reached("Invalid reply message");
937 dbus_message_unref(reply);
938 dbus_error_free(&error);
941 int bus_query_pid(Manager *m, const char *name) {
942 DBusMessage *message = NULL;
943 DBusPendingCall *pending = NULL;
949 if (!(message = dbus_message_new_method_call(
953 "GetConnectionUnixProcessID")))
956 if (!(dbus_message_append_args(
958 DBUS_TYPE_STRING, &name,
962 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
965 if (!(n = strdup(name)))
968 if (!dbus_pending_call_set_data(pending, m->name_data_slot, n, free))
973 if (!dbus_pending_call_set_notify(pending, query_pid_pending_cb, m, NULL))
976 dbus_message_unref(message);
977 dbus_pending_call_unref(pending);
985 dbus_pending_call_cancel(pending);
986 dbus_pending_call_unref(pending);
990 dbus_message_unref(message);
995 DBusHandlerResult bus_default_message_handler(Manager *m, DBusMessage *message, const char*introspection, const BusProperty *properties) {
997 DBusMessage *reply = NULL;
1003 dbus_error_init(&error);
1005 if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect") && introspection) {
1007 if (!(reply = dbus_message_new_method_return(message)))
1010 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID))
1013 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Get") && properties) {
1014 const char *interface, *property;
1015 const BusProperty *p;
1017 if (!dbus_message_get_args(
1020 DBUS_TYPE_STRING, &interface,
1021 DBUS_TYPE_STRING, &property,
1023 return bus_send_error_reply(m, message, &error, -EINVAL);
1025 for (p = properties; p->property; p++)
1026 if (streq(p->interface, interface) && streq(p->property, property))
1030 DBusMessageIter iter, sub;
1032 if (!(reply = dbus_message_new_method_return(message)))
1035 dbus_message_iter_init_append(reply, &iter);
1037 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, p->signature, &sub))
1040 if ((r = p->append(m, &sub, property, (void*) p->data)) < 0) {
1045 dbus_message_unref(reply);
1046 return bus_send_error_reply(m, message, NULL, r);
1049 if (!dbus_message_iter_close_container(&iter, &sub))
1052 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "GetAll") && properties) {
1053 const char *interface;
1054 const BusProperty *p;
1055 DBusMessageIter iter, sub, sub2, sub3;
1058 if (!dbus_message_get_args(
1061 DBUS_TYPE_STRING, &interface,
1063 return bus_send_error_reply(m, message, &error, -EINVAL);
1065 if (!(reply = dbus_message_new_method_return(message)))
1068 dbus_message_iter_init_append(reply, &iter);
1070 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub))
1073 for (p = properties; p->property; p++) {
1074 if (!streq(p->interface, interface))
1077 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, NULL, &sub2) ||
1078 !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &p->property) ||
1079 !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, p->signature, &sub3))
1082 if ((r = p->append(m, &sub3, p->property, (void*) p->data)) < 0) {
1087 dbus_message_unref(reply);
1088 return bus_send_error_reply(m, message, NULL, r);
1091 if (!dbus_message_iter_close_container(&sub2, &sub3) ||
1092 !dbus_message_iter_close_container(&sub, &sub2))
1098 if (!dbus_message_iter_close_container(&iter, &sub))
1103 if (!dbus_connection_send(m->api_bus, reply, NULL))
1106 dbus_message_unref(reply);
1107 return DBUS_HANDLER_RESULT_HANDLED;
1110 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1114 dbus_message_unref(reply);
1116 dbus_error_free(&error);
1118 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1121 static const char *error_to_dbus(int error) {
1126 return DBUS_ERROR_INVALID_ARGS;
1129 return DBUS_ERROR_NO_MEMORY;
1133 return DBUS_ERROR_ACCESS_DENIED;
1136 return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN;
1139 return DBUS_ERROR_FILE_NOT_FOUND;
1142 return DBUS_ERROR_FILE_EXISTS;
1145 return DBUS_ERROR_TIMEOUT;
1148 return DBUS_ERROR_IO_ERROR;
1153 return DBUS_ERROR_DISCONNECTED;
1156 return DBUS_ERROR_FAILED;
1159 DBusHandlerResult bus_send_error_reply(Manager *m, DBusMessage *message, DBusError *bus_error, int error) {
1160 DBusMessage *reply = NULL;
1161 const char *name, *text;
1163 if (bus_error && dbus_error_is_set(bus_error)) {
1164 name = bus_error->name;
1165 text = bus_error->message;
1167 name = error_to_dbus(error);
1168 text = strerror(-error);
1171 if (!(reply = dbus_message_new_error(message, name, text)))
1174 if (!dbus_connection_send(m->api_bus, reply, NULL))
1177 dbus_message_unref(reply);
1180 dbus_error_free(bus_error);
1182 return DBUS_HANDLER_RESULT_HANDLED;
1186 dbus_message_unref(reply);
1189 dbus_error_free(bus_error);
1191 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1194 int bus_property_append_string(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1195 const char *t = data;
1204 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
1210 int bus_property_append_strv(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1211 DBusMessageIter sub;
1218 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
1222 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, t))
1225 if (!dbus_message_iter_close_container(i, &sub))
1231 int bus_property_append_bool(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1242 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db))
1248 int bus_property_append_uint64(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1254 /* Let's ensure that pid_t is actually 64bit, and hence this
1255 * function can be used for usec_t */
1256 assert_cc(sizeof(uint64_t) == sizeof(usec_t));
1258 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, data))
1264 int bus_property_append_uint32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1270 /* Let's ensure that pid_t and mode_t is actually 32bit, and
1271 * hence this function can be used for pid_t/mode_t */
1272 assert_cc(sizeof(uint32_t) == sizeof(pid_t));
1273 assert_cc(sizeof(uint32_t) == sizeof(mode_t));
1274 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
1276 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data))
1282 int bus_property_append_int32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1288 assert_cc(sizeof(int32_t) == sizeof(int));
1290 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, data))
1296 int bus_parse_strv(DBusMessage *m, char ***_l) {
1297 DBusMessageIter iter, sub;
1298 unsigned n = 0, i = 0;
1304 if (!dbus_message_iter_init(m, &iter) ||
1305 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
1306 dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
1309 dbus_message_iter_recurse(&iter, &sub);
1311 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1313 dbus_message_iter_next(&sub);
1316 if (!(l = new(char*, n+1)))
1319 assert_se(dbus_message_iter_init(m, &iter));
1320 dbus_message_iter_recurse(&iter, &sub);
1322 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1325 assert_se(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
1326 dbus_message_iter_get_basic(&sub, &s);
1328 if (!(l[i++] = strdup(s))) {
1333 dbus_message_iter_next(&sub);