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 r = manager_load_unit(m, name, NULL, &u);
389 if (r >= 0 && u->meta.only_by_dependency)
393 r = manager_add_job(m, JOB_START, u, JOB_REPLACE, true, NULL);
396 const char *id, *text;
398 if (!(reply = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure")))
401 id = error_to_dbus(r);
404 if (!dbus_message_set_destination(reply, DBUS_SERVICE_DBUS) ||
405 !dbus_message_append_args(reply,
406 DBUS_TYPE_STRING, &name,
407 DBUS_TYPE_STRING, &id,
408 DBUS_TYPE_STRING, &text,
413 /* On success we don't do anything, the service will be spwaned now */
417 dbus_error_free(&error);
420 if (!dbus_connection_send(connection, reply, NULL))
423 dbus_message_unref(reply);
426 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
430 dbus_message_unref(reply);
432 dbus_error_free(&error);
434 return DBUS_HANDLER_RESULT_NEED_MEMORY;
437 static DBusHandlerResult system_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
445 dbus_error_init(&error);
447 /* log_debug("Got D-Bus request: %s.%s() on %s", */
448 /* dbus_message_get_interface(message), */
449 /* dbus_message_get_member(message), */
450 /* dbus_message_get_path(message)); */
452 if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
453 log_error("Warning! System D-Bus connection terminated.");
456 } if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
459 if (!dbus_message_get_args(message, &error,
460 DBUS_TYPE_STRING, &cgroup,
462 log_error("Failed to parse Released message: %s", error.message);
464 cgroup_notify_empty(m, cgroup);
467 dbus_error_free(&error);
468 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
471 unsigned bus_dispatch(Manager *m) {
474 if (m->queued_message) {
475 /* If we cannot get rid of this message we won't
476 * dispatch any D-Bus messages, so that we won't end
477 * up wanting to queue another message. */
479 if (!dbus_connection_send(m->api_bus, m->queued_message, NULL))
482 dbus_message_unref(m->queued_message);
483 m->queued_message = NULL;
486 if (m->request_api_bus_dispatch) {
487 if (dbus_connection_dispatch(m->api_bus) == DBUS_DISPATCH_COMPLETE)
488 m->request_api_bus_dispatch = false;
493 if (m->request_system_bus_dispatch) {
494 if (dbus_connection_dispatch(m->system_bus) == DBUS_DISPATCH_COMPLETE)
495 m->request_system_bus_dispatch = false;
503 static void request_name_pending_cb(DBusPendingCall *pending, void *userdata) {
507 dbus_error_init(&error);
509 assert_se(reply = dbus_pending_call_steal_reply(pending));
511 switch (dbus_message_get_type(reply)) {
513 case DBUS_MESSAGE_TYPE_ERROR:
515 assert_se(dbus_set_error_from_message(&error, reply));
516 log_warning("RequestName() failed: %s", error.message);
519 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
522 if (!dbus_message_get_args(reply,
524 DBUS_TYPE_UINT32, &r,
525 DBUS_TYPE_INVALID)) {
526 log_error("Failed to parse RequestName() reply: %s", error.message);
531 log_debug("Successfully acquired name.");
533 log_error("Name already owned.");
539 assert_not_reached("Invalid reply message");
542 dbus_message_unref(reply);
543 dbus_error_free(&error);
546 static int request_name(Manager *m) {
547 const char *name = "org.freedesktop.systemd1";
549 DBusMessage *message = NULL;
550 DBusPendingCall *pending = NULL;
552 if (!(message = dbus_message_new_method_call(
559 if (!dbus_message_append_args(
561 DBUS_TYPE_STRING, &name,
562 DBUS_TYPE_UINT32, &flags,
566 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
569 if (!dbus_pending_call_set_notify(pending, request_name_pending_cb, m, NULL))
572 dbus_message_unref(message);
573 dbus_pending_call_unref(pending);
575 /* We simple ask for the name and don't wait for it. Sooner or
576 * later we'll have it. */
582 dbus_pending_call_cancel(pending);
583 dbus_pending_call_unref(pending);
587 dbus_message_unref(message);
592 static void query_name_list_pending_cb(DBusPendingCall *pending, void *userdata) {
595 Manager *m = userdata;
599 dbus_error_init(&error);
601 assert_se(reply = dbus_pending_call_steal_reply(pending));
603 switch (dbus_message_get_type(reply)) {
605 case DBUS_MESSAGE_TYPE_ERROR:
607 assert_se(dbus_set_error_from_message(&error, reply));
608 log_warning("ListNames() failed: %s", error.message);
611 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
615 if ((r = bus_parse_strv(reply, &l)) < 0)
616 log_warning("Failed to parse ListNames() reply: %s", strerror(-r));
621 /* This is a bit hacky, we say the
622 * owner of the name is the name
623 * itself, because we don't want the
624 * extra traffic to figure out the
626 manager_dispatch_bus_name_owner_changed(m, *t, NULL, *t);
635 assert_not_reached("Invalid reply message");
638 dbus_message_unref(reply);
639 dbus_error_free(&error);
642 static int query_name_list(Manager *m) {
643 DBusMessage *message = NULL;
644 DBusPendingCall *pending = NULL;
646 /* Asks for the currently installed bus names */
648 if (!(message = dbus_message_new_method_call(
655 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
658 if (!dbus_pending_call_set_notify(pending, query_name_list_pending_cb, m, NULL))
661 dbus_message_unref(message);
662 dbus_pending_call_unref(pending);
664 /* We simple ask for the list and don't wait for it. Sooner or
665 * later we'll get it. */
671 dbus_pending_call_cancel(pending);
672 dbus_pending_call_unref(pending);
676 dbus_message_unref(message);
681 static int bus_setup_loop(Manager *m, DBusConnection *bus) {
685 dbus_connection_set_exit_on_disconnect(bus, FALSE);
687 if (!dbus_connection_set_watch_functions(bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
688 !dbus_connection_set_timeout_functions(bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL))
694 int bus_init_system(Manager *m) {
701 dbus_error_init(&error);
706 if (m->running_as != MANAGER_SESSION && m->api_bus)
707 m->system_bus = m->api_bus;
709 if (!(m->system_bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error))) {
710 log_debug("Failed to get system D-Bus connection, retrying later: %s", error.message);
711 dbus_error_free(&error);
715 dbus_connection_set_dispatch_status_function(m->system_bus, system_bus_dispatch_status, m, NULL);
716 m->request_system_bus_dispatch = true;
718 if ((r = bus_setup_loop(m, m->system_bus)) < 0) {
724 if (!dbus_connection_add_filter(m->system_bus, system_bus_message_filter, m, NULL)) {
729 dbus_bus_add_match(m->system_bus,
731 "interface='org.freedesktop.systemd1.Agent',"
732 "path='/org/freedesktop/systemd1/agent'",
735 if (dbus_error_is_set(&error)) {
736 log_error("Failed to register match: %s", error.message);
737 dbus_error_free(&error);
742 log_debug("Successfully connected to system D-Bus bus %s as %s",
743 strnull((id = dbus_connection_get_server_id(m->system_bus))),
744 strnull(dbus_bus_get_unique_name(m->system_bus)));
750 int bus_init_api(Manager *m) {
757 dbus_error_init(&error);
762 if (m->name_data_slot < 0)
763 if (!dbus_pending_call_allocate_data_slot(&m->name_data_slot))
766 if (m->running_as != MANAGER_SESSION && m->system_bus)
767 m->api_bus = m->system_bus;
769 if (!(m->api_bus = dbus_bus_get_private(m->running_as == MANAGER_SESSION ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error))) {
770 log_debug("Failed to get API D-Bus connection, retrying later: %s", error.message);
771 dbus_error_free(&error);
775 dbus_connection_set_dispatch_status_function(m->api_bus, api_bus_dispatch_status, m, NULL);
776 m->request_api_bus_dispatch = true;
778 if ((r = bus_setup_loop(m, m->api_bus)) < 0) {
784 if (!dbus_connection_register_object_path(m->api_bus, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
785 !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
786 !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
787 !dbus_connection_add_filter(m->api_bus, api_bus_message_filter, m, NULL)) {
792 /* Get NameOwnerChange messages */
793 dbus_bus_add_match(m->api_bus,
795 "sender='"DBUS_SERVICE_DBUS"',"
796 "interface='"DBUS_INTERFACE_DBUS"',"
797 "path='"DBUS_PATH_DBUS"'",
800 if (dbus_error_is_set(&error)) {
801 log_error("Failed to register match: %s", error.message);
802 dbus_error_free(&error);
807 /* Get activation requests */
808 dbus_bus_add_match(m->api_bus,
810 "sender='"DBUS_SERVICE_DBUS"',"
811 "interface='org.freedesktop.systemd1.Activator',"
812 "path='"DBUS_PATH_DBUS"'",
815 if (dbus_error_is_set(&error)) {
816 log_error("Failed to register match: %s", error.message);
817 dbus_error_free(&error);
822 if ((r = request_name(m)) < 0) {
827 if ((r = query_name_list(m)) < 0) {
832 log_debug("Successfully connected to API D-Bus bus %s as %s",
833 strnull((id = dbus_connection_get_server_id(m->api_bus))),
834 strnull(dbus_bus_get_unique_name(m->api_bus)));
838 if (!(m->subscribed = set_new(string_hash_func, string_compare_func)))
844 void bus_done_api(Manager *m) {
848 if (m->system_bus == m->api_bus)
849 m->system_bus = NULL;
851 dbus_connection_set_dispatch_status_function(m->api_bus, NULL, NULL, NULL);
852 dbus_connection_flush(m->api_bus);
853 dbus_connection_close(m->api_bus);
854 dbus_connection_unref(m->api_bus);
861 while ((c = set_steal_first(m->subscribed)))
864 set_free(m->subscribed);
865 m->subscribed = NULL;
868 if (m->name_data_slot >= 0)
869 dbus_pending_call_free_data_slot(&m->name_data_slot);
871 if (m->queued_message) {
872 dbus_message_unref(m->queued_message);
873 m->queued_message = NULL;
877 void bus_done_system(Manager *m) {
880 if (m->system_bus == m->api_bus)
884 dbus_connection_set_dispatch_status_function(m->system_bus, NULL, NULL, NULL);
885 dbus_connection_flush(m->system_bus);
886 dbus_connection_close(m->system_bus);
887 dbus_connection_unref(m->system_bus);
888 m->system_bus = NULL;
892 static void query_pid_pending_cb(DBusPendingCall *pending, void *userdata) {
893 Manager *m = userdata;
898 dbus_error_init(&error);
900 assert_se(name = dbus_pending_call_get_data(pending, m->name_data_slot));
901 assert_se(reply = dbus_pending_call_steal_reply(pending));
903 switch (dbus_message_get_type(reply)) {
905 case DBUS_MESSAGE_TYPE_ERROR:
907 assert_se(dbus_set_error_from_message(&error, reply));
908 log_warning("GetConnectionUnixProcessID() failed: %s", error.message);
911 case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
914 if (!dbus_message_get_args(reply,
916 DBUS_TYPE_UINT32, &r,
917 DBUS_TYPE_INVALID)) {
918 log_error("Failed to parse GetConnectionUnixProcessID() reply: %s", error.message);
922 manager_dispatch_bus_query_pid_done(m, name, (pid_t) r);
927 assert_not_reached("Invalid reply message");
930 dbus_message_unref(reply);
931 dbus_error_free(&error);
934 int bus_query_pid(Manager *m, const char *name) {
935 DBusMessage *message = NULL;
936 DBusPendingCall *pending = NULL;
942 if (!(message = dbus_message_new_method_call(
946 "GetConnectionUnixProcessID")))
949 if (!(dbus_message_append_args(
951 DBUS_TYPE_STRING, &name,
955 if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
958 if (!(n = strdup(name)))
961 if (!dbus_pending_call_set_data(pending, m->name_data_slot, n, free))
966 if (!dbus_pending_call_set_notify(pending, query_pid_pending_cb, m, NULL))
969 dbus_message_unref(message);
970 dbus_pending_call_unref(pending);
978 dbus_pending_call_cancel(pending);
979 dbus_pending_call_unref(pending);
983 dbus_message_unref(message);
988 DBusHandlerResult bus_default_message_handler(Manager *m, DBusMessage *message, const char*introspection, const BusProperty *properties) {
990 DBusMessage *reply = NULL;
996 dbus_error_init(&error);
998 if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect") && introspection) {
1000 if (!(reply = dbus_message_new_method_return(message)))
1003 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID))
1006 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Get") && properties) {
1007 const char *interface, *property;
1008 const BusProperty *p;
1010 if (!dbus_message_get_args(
1013 DBUS_TYPE_STRING, &interface,
1014 DBUS_TYPE_STRING, &property,
1016 return bus_send_error_reply(m, message, &error, -EINVAL);
1018 for (p = properties; p->property; p++)
1019 if (streq(p->interface, interface) && streq(p->property, property))
1023 DBusMessageIter iter, sub;
1025 if (!(reply = dbus_message_new_method_return(message)))
1028 dbus_message_iter_init_append(reply, &iter);
1030 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, p->signature, &sub))
1033 if ((r = p->append(m, &sub, property, (void*) p->data)) < 0) {
1038 dbus_message_unref(reply);
1039 return bus_send_error_reply(m, message, NULL, r);
1042 if (!dbus_message_iter_close_container(&iter, &sub))
1045 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "GetAll") && properties) {
1046 const char *interface;
1047 const BusProperty *p;
1048 DBusMessageIter iter, sub, sub2, sub3;
1051 if (!dbus_message_get_args(
1054 DBUS_TYPE_STRING, &interface,
1056 return bus_send_error_reply(m, message, &error, -EINVAL);
1058 if (!(reply = dbus_message_new_method_return(message)))
1061 dbus_message_iter_init_append(reply, &iter);
1063 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub))
1066 for (p = properties; p->property; p++) {
1067 if (!streq(p->interface, interface))
1070 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, NULL, &sub2) ||
1071 !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &p->property) ||
1072 !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, p->signature, &sub3))
1075 if ((r = p->append(m, &sub3, p->property, (void*) p->data)) < 0) {
1080 dbus_message_unref(reply);
1081 return bus_send_error_reply(m, message, NULL, r);
1084 if (!dbus_message_iter_close_container(&sub2, &sub3) ||
1085 !dbus_message_iter_close_container(&sub, &sub2))
1091 if (!dbus_message_iter_close_container(&iter, &sub))
1096 if (!dbus_connection_send(m->api_bus, reply, NULL))
1099 dbus_message_unref(reply);
1100 return DBUS_HANDLER_RESULT_HANDLED;
1103 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1107 dbus_message_unref(reply);
1109 dbus_error_free(&error);
1111 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1114 static const char *error_to_dbus(int error) {
1119 return DBUS_ERROR_INVALID_ARGS;
1122 return DBUS_ERROR_NO_MEMORY;
1126 return DBUS_ERROR_ACCESS_DENIED;
1129 return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN;
1132 return DBUS_ERROR_FILE_NOT_FOUND;
1135 return DBUS_ERROR_FILE_EXISTS;
1138 return DBUS_ERROR_TIMEOUT;
1141 return DBUS_ERROR_IO_ERROR;
1146 return DBUS_ERROR_DISCONNECTED;
1149 return DBUS_ERROR_FAILED;
1152 DBusHandlerResult bus_send_error_reply(Manager *m, DBusMessage *message, DBusError *bus_error, int error) {
1153 DBusMessage *reply = NULL;
1154 const char *name, *text;
1156 if (bus_error && dbus_error_is_set(bus_error)) {
1157 name = bus_error->name;
1158 text = bus_error->message;
1160 name = error_to_dbus(error);
1161 text = strerror(-error);
1164 if (!(reply = dbus_message_new_error(message, name, text)))
1167 if (!dbus_connection_send(m->api_bus, reply, NULL))
1170 dbus_message_unref(reply);
1173 dbus_error_free(bus_error);
1175 return DBUS_HANDLER_RESULT_HANDLED;
1179 dbus_message_unref(reply);
1182 dbus_error_free(bus_error);
1184 return DBUS_HANDLER_RESULT_NEED_MEMORY;
1187 int bus_property_append_string(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1188 const char *t = data;
1197 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
1203 int bus_property_append_strv(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1204 DBusMessageIter sub;
1211 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
1215 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, t))
1218 if (!dbus_message_iter_close_container(i, &sub))
1224 int bus_property_append_bool(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1235 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db))
1241 int bus_property_append_uint64(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1247 /* Let's ensure that pid_t is actually 64bit, and hence this
1248 * function can be used for usec_t */
1249 assert_cc(sizeof(uint64_t) == sizeof(usec_t));
1251 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, data))
1257 int bus_property_append_uint32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1263 /* Let's ensure that pid_t and mode_t is actually 32bit, and
1264 * hence this function can be used for pid_t/mode_t */
1265 assert_cc(sizeof(uint32_t) == sizeof(pid_t));
1266 assert_cc(sizeof(uint32_t) == sizeof(mode_t));
1267 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
1269 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data))
1275 int bus_property_append_int32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
1281 assert_cc(sizeof(int32_t) == sizeof(int));
1283 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, data))
1289 int bus_parse_strv(DBusMessage *m, char ***_l) {
1290 DBusMessageIter iter, sub;
1291 unsigned n = 0, i = 0;
1297 if (!dbus_message_iter_init(m, &iter) ||
1298 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
1299 dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
1302 dbus_message_iter_recurse(&iter, &sub);
1304 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1306 dbus_message_iter_next(&sub);
1309 if (!(l = new(char*, n+1)))
1312 assert_se(dbus_message_iter_init(m, &iter));
1313 dbus_message_iter_recurse(&iter, &sub);
1315 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1318 assert_se(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
1319 dbus_message_iter_get_basic(&sub, &s);
1321 if (!(l[i++] = strdup(s))) {
1326 dbus_message_iter_next(&sub);