1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <sys/epoll.h>
23 #include <sys/timerfd.h>
26 #include <dbus/dbus.h>
32 #include "dbus-unit.h"
34 #include "dbus-manager.h"
35 #include "dbus-service.h"
36 #include "dbus-socket.h"
37 #include "dbus-target.h"
38 #include "dbus-device.h"
39 #include "dbus-mount.h"
40 #include "dbus-automount.h"
41 #include "dbus-snapshot.h"
42 #include "dbus-swap.h"
43 #include "dbus-timer.h"
44 #include "dbus-path.h"
45 #include "bus-errors.h"
48 #define CONNECTIONS_MAX 52
50 static const char bus_properties_interface
[] = BUS_PROPERTIES_INTERFACE
;
51 static const char bus_introspectable_interface
[] = BUS_INTROSPECTABLE_INTERFACE
;
53 const char *const bus_interface_table
[] = {
54 "org.freedesktop.DBus.Properties", bus_properties_interface
,
55 "org.freedesktop.DBus.Introspectable", bus_introspectable_interface
,
56 "org.freedesktop.systemd1.Manager", bus_manager_interface
,
57 "org.freedesktop.systemd1.Job", bus_job_interface
,
58 "org.freedesktop.systemd1.Unit", bus_unit_interface
,
59 "org.freedesktop.systemd1.Service", bus_service_interface
,
60 "org.freedesktop.systemd1.Socket", bus_socket_interface
,
61 "org.freedesktop.systemd1.Target", bus_target_interface
,
62 "org.freedesktop.systemd1.Device", bus_device_interface
,
63 "org.freedesktop.systemd1.Mount", bus_mount_interface
,
64 "org.freedesktop.systemd1.Automount", bus_automount_interface
,
65 "org.freedesktop.systemd1.Snapshot", bus_snapshot_interface
,
66 "org.freedesktop.systemd1.Swap", bus_swap_interface
,
67 "org.freedesktop.systemd1.Timer", bus_timer_interface
,
68 "org.freedesktop.systemd1.Path", bus_path_interface
,
72 static const char *error_to_dbus(int error
);
73 static void bus_done_api(Manager
*m
);
74 static void bus_done_system(Manager
*m
);
75 static void bus_done_private(Manager
*m
);
76 static void shutdown_connection(Manager
*m
, DBusConnection
*c
);
78 static void bus_dispatch_status(DBusConnection
*bus
, DBusDispatchStatus status
, void *data
) {
84 /* We maintain two sets, one for those connections where we
85 * requested a dispatch, and another where we didn't. And then,
86 * we move the connections between the two sets. */
88 if (status
== DBUS_DISPATCH_COMPLETE
)
89 set_move_one(m
->bus_connections
, m
->bus_connections_for_dispatch
, bus
);
91 set_move_one(m
->bus_connections_for_dispatch
, m
->bus_connections
, bus
);
94 static uint32_t bus_flags_to_events(DBusWatch
*bus_watch
) {
100 /* no watch flags for disabled watches */
101 if (!dbus_watch_get_enabled(bus_watch
))
104 flags
= dbus_watch_get_flags(bus_watch
);
106 if (flags
& DBUS_WATCH_READABLE
)
108 if (flags
& DBUS_WATCH_WRITABLE
)
111 return events
| EPOLLHUP
| EPOLLERR
;
114 static unsigned events_to_bus_flags(uint32_t events
) {
117 if (events
& EPOLLIN
)
118 flags
|= DBUS_WATCH_READABLE
;
119 if (events
& EPOLLOUT
)
120 flags
|= DBUS_WATCH_WRITABLE
;
121 if (events
& EPOLLHUP
)
122 flags
|= DBUS_WATCH_HANGUP
;
123 if (events
& EPOLLERR
)
124 flags
|= DBUS_WATCH_ERROR
;
129 void bus_watch_event(Manager
*m
, Watch
*w
, int events
) {
133 /* This is called by the event loop whenever there is
134 * something happening on D-Bus' file handles. */
136 if (!dbus_watch_get_enabled(w
->data
.bus_watch
))
139 dbus_watch_handle(w
->data
.bus_watch
, events_to_bus_flags(events
));
142 static dbus_bool_t
bus_add_watch(DBusWatch
*bus_watch
, void *data
) {
145 struct epoll_event ev
;
150 if (!(w
= new0(Watch
, 1)))
153 w
->fd
= dbus_watch_get_unix_fd(bus_watch
);
154 w
->type
= WATCH_DBUS_WATCH
;
155 w
->data
.bus_watch
= bus_watch
;
158 ev
.events
= bus_flags_to_events(bus_watch
);
161 if (epoll_ctl(m
->epoll_fd
, EPOLL_CTL_ADD
, w
->fd
, &ev
) < 0) {
163 if (errno
!= EEXIST
) {
168 /* Hmm, bloody D-Bus creates multiple watches on the
169 * same fd. epoll() does not like that. As a dirty
170 * hack we simply dup() the fd and hence get a second
171 * one we can safely add to the epoll(). */
173 if ((w
->fd
= dup(w
->fd
)) < 0) {
178 if (epoll_ctl(m
->epoll_fd
, EPOLL_CTL_ADD
, w
->fd
, &ev
) < 0) {
180 close_nointr_nofail(w
->fd
);
184 w
->fd_is_dupped
= true;
187 dbus_watch_set_data(bus_watch
, w
, NULL
);
192 static void bus_remove_watch(DBusWatch
*bus_watch
, void *data
) {
199 if (!(w
= dbus_watch_get_data(bus_watch
)))
202 assert(w
->type
== WATCH_DBUS_WATCH
);
203 assert_se(epoll_ctl(m
->epoll_fd
, EPOLL_CTL_DEL
, w
->fd
, NULL
) >= 0);
206 close_nointr_nofail(w
->fd
);
211 static void bus_toggle_watch(DBusWatch
*bus_watch
, void *data
) {
214 struct epoll_event ev
;
219 assert_se(w
= dbus_watch_get_data(bus_watch
));
220 assert(w
->type
== WATCH_DBUS_WATCH
);
223 ev
.events
= bus_flags_to_events(bus_watch
);
226 assert_se(epoll_ctl(m
->epoll_fd
, EPOLL_CTL_MOD
, w
->fd
, &ev
) == 0);
229 static int bus_timeout_arm(Manager
*m
, Watch
*w
) {
230 struct itimerspec its
;
237 if (dbus_timeout_get_enabled(w
->data
.bus_timeout
)) {
238 timespec_store(&its
.it_value
, dbus_timeout_get_interval(w
->data
.bus_timeout
) * USEC_PER_MSEC
);
239 its
.it_interval
= its
.it_interval
;
242 if (timerfd_settime(w
->fd
, 0, &its
, NULL
) < 0)
248 void bus_timeout_event(Manager
*m
, Watch
*w
, int events
) {
252 /* This is called by the event loop whenever there is
253 * something happening on D-Bus' file handles. */
255 if (!(dbus_timeout_get_enabled(w
->data
.bus_timeout
)))
258 dbus_timeout_handle(w
->data
.bus_timeout
);
261 static dbus_bool_t
bus_add_timeout(DBusTimeout
*timeout
, void *data
) {
264 struct epoll_event ev
;
269 if (!(w
= new0(Watch
, 1)))
272 if (!(w
->fd
= timerfd_create(CLOCK_MONOTONIC
, TFD_NONBLOCK
|TFD_CLOEXEC
)) < 0)
275 w
->type
= WATCH_DBUS_TIMEOUT
;
276 w
->data
.bus_timeout
= timeout
;
278 if (bus_timeout_arm(m
, w
) < 0)
285 if (epoll_ctl(m
->epoll_fd
, EPOLL_CTL_ADD
, w
->fd
, &ev
) < 0)
288 dbus_timeout_set_data(timeout
, w
, NULL
);
294 close_nointr_nofail(w
->fd
);
300 static void bus_remove_timeout(DBusTimeout
*timeout
, void *data
) {
307 if (!(w
= dbus_timeout_get_data(timeout
)))
310 assert(w
->type
== WATCH_DBUS_TIMEOUT
);
311 assert_se(epoll_ctl(m
->epoll_fd
, EPOLL_CTL_DEL
, w
->fd
, NULL
) >= 0);
312 close_nointr_nofail(w
->fd
);
316 static void bus_toggle_timeout(DBusTimeout
*timeout
, void *data
) {
324 assert_se(w
= dbus_timeout_get_data(timeout
));
325 assert(w
->type
== WATCH_DBUS_TIMEOUT
);
327 if ((r
= bus_timeout_arm(m
, w
)) < 0)
328 log_error("Failed to rearm timer: %s", strerror(-r
));
331 static DBusHandlerResult
api_bus_message_filter(DBusConnection
*connection
, DBusMessage
*message
, void *data
) {
334 DBusMessage
*reply
= NULL
;
340 dbus_error_init(&error
);
342 if (dbus_message_get_type(message
) == DBUS_MESSAGE_TYPE_METHOD_CALL
||
343 dbus_message_get_type(message
) == DBUS_MESSAGE_TYPE_SIGNAL
)
344 log_debug("Got D-Bus request: %s.%s() on %s",
345 dbus_message_get_interface(message
),
346 dbus_message_get_member(message
),
347 dbus_message_get_path(message
));
349 if (dbus_message_is_signal(message
, DBUS_INTERFACE_LOCAL
, "Disconnected")) {
350 log_debug("API D-Bus connection terminated.");
353 } else if (dbus_message_is_signal(message
, DBUS_INTERFACE_DBUS
, "NameOwnerChanged")) {
354 const char *name
, *old_owner
, *new_owner
;
356 if (!dbus_message_get_args(message
, &error
,
357 DBUS_TYPE_STRING
, &name
,
358 DBUS_TYPE_STRING
, &old_owner
,
359 DBUS_TYPE_STRING
, &new_owner
,
361 log_error("Failed to parse NameOwnerChanged message: %s", error
.message
);
363 if (set_remove(BUS_CONNECTION_SUBSCRIBED(m
, connection
), (char*) name
))
364 log_debug("Subscription client vanished: %s (left: %u)", name
, set_size(BUS_CONNECTION_SUBSCRIBED(m
, connection
)));
366 if (old_owner
[0] == 0)
369 if (new_owner
[0] == 0)
372 manager_dispatch_bus_name_owner_changed(m
, name
, old_owner
, new_owner
);
374 } else if (dbus_message_is_signal(message
, "org.freedesktop.systemd1.Activator", "ActivationRequest")) {
377 if (!dbus_message_get_args(message
, &error
,
378 DBUS_TYPE_STRING
, &name
,
380 log_error("Failed to parse ActivationRequest message: %s", error
.message
);
385 log_debug("Got D-Bus activation request for %s", name
);
387 if (manager_unit_pending_inactive(m
, SPECIAL_DBUS_SERVICE
) ||
388 manager_unit_pending_inactive(m
, SPECIAL_DBUS_SOCKET
)) {
390 dbus_set_error(&error
, BUS_ERROR_SHUTTING_DOWN
, "Refusing activation, D-Bus is shutting down.");
392 r
= manager_load_unit(m
, name
, NULL
, &error
, &u
);
394 if (r
>= 0 && u
->meta
.refuse_manual_start
)
398 r
= manager_add_job(m
, JOB_START
, u
, JOB_REPLACE
, true, &error
, NULL
);
402 const char *id
, *text
;
404 log_debug("D-Bus activation failed for %s: %s", name
, strerror(-r
));
406 if (!(reply
= dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure")))
409 id
= error
.name
? error
.name
: error_to_dbus(r
);
410 text
= bus_error(&error
, r
);
412 if (!dbus_message_set_destination(reply
, DBUS_SERVICE_DBUS
) ||
413 !dbus_message_append_args(reply
,
414 DBUS_TYPE_STRING
, &name
,
415 DBUS_TYPE_STRING
, &id
,
416 DBUS_TYPE_STRING
, &text
,
421 /* On success we don't do anything, the service will be spawned now */
425 dbus_error_free(&error
);
428 if (!dbus_connection_send(connection
, reply
, NULL
))
431 dbus_message_unref(reply
);
434 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED
;
438 dbus_message_unref(reply
);
440 dbus_error_free(&error
);
442 return DBUS_HANDLER_RESULT_NEED_MEMORY
;
445 static DBusHandlerResult
system_bus_message_filter(DBusConnection
*connection
, DBusMessage
*message
, void *data
) {
453 dbus_error_init(&error
);
455 if (m
->api_bus
!= m
->system_bus
&&
456 (dbus_message_get_type(message
) == DBUS_MESSAGE_TYPE_METHOD_CALL
||
457 dbus_message_get_type(message
) == DBUS_MESSAGE_TYPE_SIGNAL
))
458 log_debug("Got D-Bus request on system bus: %s.%s() on %s",
459 dbus_message_get_interface(message
),
460 dbus_message_get_member(message
),
461 dbus_message_get_path(message
));
463 if (dbus_message_is_signal(message
, DBUS_INTERFACE_LOCAL
, "Disconnected")) {
464 log_debug("System D-Bus connection terminated.");
467 } else if (m
->running_as
!= MANAGER_SYSTEM
&&
468 dbus_message_is_signal(message
, "org.freedesktop.systemd1.Agent", "Released")) {
472 if (!dbus_message_get_args(message
, &error
,
473 DBUS_TYPE_STRING
, &cgroup
,
475 log_error("Failed to parse Released message: %s", error
.message
);
477 cgroup_notify_empty(m
, cgroup
);
480 dbus_error_free(&error
);
481 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED
;
484 static DBusHandlerResult
private_bus_message_filter(DBusConnection
*connection
, DBusMessage
*message
, void *data
) {
492 dbus_error_init(&error
);
494 if (dbus_message_get_type(message
) == DBUS_MESSAGE_TYPE_METHOD_CALL
||
495 dbus_message_get_type(message
) == DBUS_MESSAGE_TYPE_SIGNAL
)
496 log_debug("Got D-Bus request: %s.%s() on %s",
497 dbus_message_get_interface(message
),
498 dbus_message_get_member(message
),
499 dbus_message_get_path(message
));
501 if (dbus_message_is_signal(message
, DBUS_INTERFACE_LOCAL
, "Disconnected"))
502 shutdown_connection(m
, connection
);
503 else if (m
->running_as
== MANAGER_SYSTEM
&&
504 dbus_message_is_signal(message
, "org.freedesktop.systemd1.Agent", "Released")) {
508 if (!dbus_message_get_args(message
, &error
,
509 DBUS_TYPE_STRING
, &cgroup
,
511 log_error("Failed to parse Released message: %s", error
.message
);
513 cgroup_notify_empty(m
, cgroup
);
515 /* Forward the message to the system bus, so that user
516 * instances are notified as well */
519 dbus_connection_send(m
->system_bus
, message
, NULL
);
522 dbus_error_free(&error
);
524 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED
;
527 unsigned bus_dispatch(Manager
*m
) {
532 if (m
->queued_message
) {
533 /* If we cannot get rid of this message we won't
534 * dispatch any D-Bus messages, so that we won't end
535 * up wanting to queue another message. */
537 if (m
->queued_message_connection
)
538 if (!dbus_connection_send(m
->queued_message_connection
, m
->queued_message
, NULL
))
541 dbus_message_unref(m
->queued_message
);
542 m
->queued_message
= NULL
;
543 m
->queued_message_connection
= NULL
;
546 if ((c
= set_first(m
->bus_connections_for_dispatch
))) {
547 if (dbus_connection_dispatch(c
) == DBUS_DISPATCH_COMPLETE
)
548 set_move_one(m
->bus_connections
, m
->bus_connections_for_dispatch
, c
);
556 static void request_name_pending_cb(DBusPendingCall
*pending
, void *userdata
) {
560 dbus_error_init(&error
);
562 assert_se(reply
= dbus_pending_call_steal_reply(pending
));
564 switch (dbus_message_get_type(reply
)) {
566 case DBUS_MESSAGE_TYPE_ERROR
:
568 assert_se(dbus_set_error_from_message(&error
, reply
));
569 log_warning("RequestName() failed: %s", error
.message
);
572 case DBUS_MESSAGE_TYPE_METHOD_RETURN
: {
575 if (!dbus_message_get_args(reply
,
577 DBUS_TYPE_UINT32
, &r
,
578 DBUS_TYPE_INVALID
)) {
579 log_error("Failed to parse RequestName() reply: %s", error
.message
);
584 log_debug("Successfully acquired name.");
586 log_error("Name already owned.");
592 assert_not_reached("Invalid reply message");
595 dbus_message_unref(reply
);
596 dbus_error_free(&error
);
599 static int request_name(Manager
*m
) {
600 const char *name
= "org.freedesktop.systemd1";
602 DBusMessage
*message
= NULL
;
603 DBusPendingCall
*pending
= NULL
;
605 if (!(message
= dbus_message_new_method_call(
612 if (!dbus_message_append_args(
614 DBUS_TYPE_STRING
, &name
,
615 DBUS_TYPE_UINT32
, &flags
,
619 if (!dbus_connection_send_with_reply(m
->api_bus
, message
, &pending
, -1))
622 if (!dbus_pending_call_set_notify(pending
, request_name_pending_cb
, m
, NULL
))
625 dbus_message_unref(message
);
626 dbus_pending_call_unref(pending
);
628 /* We simple ask for the name and don't wait for it. Sooner or
629 * later we'll have it. */
635 dbus_pending_call_cancel(pending
);
636 dbus_pending_call_unref(pending
);
640 dbus_message_unref(message
);
645 static void query_name_list_pending_cb(DBusPendingCall
*pending
, void *userdata
) {
648 Manager
*m
= userdata
;
652 dbus_error_init(&error
);
654 assert_se(reply
= dbus_pending_call_steal_reply(pending
));
656 switch (dbus_message_get_type(reply
)) {
658 case DBUS_MESSAGE_TYPE_ERROR
:
660 assert_se(dbus_set_error_from_message(&error
, reply
));
661 log_warning("ListNames() failed: %s", error
.message
);
664 case DBUS_MESSAGE_TYPE_METHOD_RETURN
: {
668 if ((r
= bus_parse_strv(reply
, &l
)) < 0)
669 log_warning("Failed to parse ListNames() reply: %s", strerror(-r
));
674 /* This is a bit hacky, we say the
675 * owner of the name is the name
676 * itself, because we don't want the
677 * extra traffic to figure out the
679 manager_dispatch_bus_name_owner_changed(m
, *t
, NULL
, *t
);
688 assert_not_reached("Invalid reply message");
691 dbus_message_unref(reply
);
692 dbus_error_free(&error
);
695 static int query_name_list(Manager
*m
) {
696 DBusMessage
*message
= NULL
;
697 DBusPendingCall
*pending
= NULL
;
699 /* Asks for the currently installed bus names */
701 if (!(message
= dbus_message_new_method_call(
708 if (!dbus_connection_send_with_reply(m
->api_bus
, message
, &pending
, -1))
711 if (!dbus_pending_call_set_notify(pending
, query_name_list_pending_cb
, m
, NULL
))
714 dbus_message_unref(message
);
715 dbus_pending_call_unref(pending
);
717 /* We simple ask for the list and don't wait for it. Sooner or
718 * later we'll get it. */
724 dbus_pending_call_cancel(pending
);
725 dbus_pending_call_unref(pending
);
729 dbus_message_unref(message
);
734 static int bus_setup_loop(Manager
*m
, DBusConnection
*bus
) {
738 dbus_connection_set_exit_on_disconnect(bus
, FALSE
);
740 if (!dbus_connection_set_watch_functions(bus
, bus_add_watch
, bus_remove_watch
, bus_toggle_watch
, m
, NULL
) ||
741 !dbus_connection_set_timeout_functions(bus
, bus_add_timeout
, bus_remove_timeout
, bus_toggle_timeout
, m
, NULL
)) {
742 log_error("Not enough memory");
746 if (set_put(m
->bus_connections_for_dispatch
, bus
) < 0) {
747 log_error("Not enough memory");
751 dbus_connection_set_dispatch_status_function(bus
, bus_dispatch_status
, m
, NULL
);
755 static dbus_bool_t
allow_only_root(DBusConnection
*connection
, unsigned long uid
, void *data
) {
759 static void bus_new_connection(
761 DBusConnection
*new_connection
,
768 if (set_size(m
->bus_connections
) >= CONNECTIONS_MAX
) {
769 log_error("Too many concurrent connections.");
773 dbus_connection_set_unix_user_function(new_connection
, allow_only_root
, NULL
, NULL
);
775 if (bus_setup_loop(m
, new_connection
) < 0)
778 if (!dbus_connection_register_object_path(new_connection
, "/org/freedesktop/systemd1", &bus_manager_vtable
, m
) ||
779 !dbus_connection_register_fallback(new_connection
, "/org/freedesktop/systemd1/unit", &bus_unit_vtable
, m
) ||
780 !dbus_connection_register_fallback(new_connection
, "/org/freedesktop/systemd1/job", &bus_job_vtable
, m
) ||
781 !dbus_connection_add_filter(new_connection
, private_bus_message_filter
, m
, NULL
)) {
782 log_error("Not enough memory.");
786 log_debug("Accepted connection on private bus.");
788 dbus_connection_ref(new_connection
);
791 static int bus_init_system(Manager
*m
) {
797 dbus_error_init(&error
);
802 if (m
->running_as
== MANAGER_SYSTEM
&& m
->api_bus
)
803 m
->system_bus
= m
->api_bus
;
805 if (!(m
->system_bus
= dbus_bus_get_private(DBUS_BUS_SYSTEM
, &error
))) {
806 log_debug("Failed to get system D-Bus connection, retrying later: %s", error
.message
);
811 if ((r
= bus_setup_loop(m
, m
->system_bus
)) < 0)
815 if (!dbus_connection_add_filter(m
->system_bus
, system_bus_message_filter
, m
, NULL
)) {
816 log_error("Not enough memory");
821 if (m
->running_as
!= MANAGER_SYSTEM
) {
822 dbus_bus_add_match(m
->system_bus
,
824 "interface='org.freedesktop.systemd1.Agent',"
826 "path='/org/freedesktop/systemd1/agent'",
829 if (dbus_error_is_set(&error
)) {
830 log_error("Failed to register match: %s", error
.message
);
836 if (m
->api_bus
!= m
->system_bus
) {
838 log_debug("Successfully connected to system D-Bus bus %s as %s",
839 strnull((id
= dbus_connection_get_server_id(m
->system_bus
))),
840 strnull(dbus_bus_get_unique_name(m
->system_bus
)));
848 dbus_error_free(&error
);
853 static int bus_init_api(Manager
*m
) {
859 dbus_error_init(&error
);
864 if (m
->running_as
== MANAGER_SYSTEM
&& m
->system_bus
)
865 m
->api_bus
= m
->system_bus
;
867 if (!(m
->api_bus
= dbus_bus_get_private(m
->running_as
== MANAGER_USER
? DBUS_BUS_SESSION
: DBUS_BUS_SYSTEM
, &error
))) {
868 log_debug("Failed to get API D-Bus connection, retrying later: %s", error
.message
);
873 if ((r
= bus_setup_loop(m
, m
->api_bus
)) < 0)
877 if (!dbus_connection_register_object_path(m
->api_bus
, "/org/freedesktop/systemd1", &bus_manager_vtable
, m
) ||
878 !dbus_connection_register_fallback(m
->api_bus
, "/org/freedesktop/systemd1/unit", &bus_unit_vtable
, m
) ||
879 !dbus_connection_register_fallback(m
->api_bus
, "/org/freedesktop/systemd1/job", &bus_job_vtable
, m
) ||
880 !dbus_connection_add_filter(m
->api_bus
, api_bus_message_filter
, m
, NULL
)) {
881 log_error("Not enough memory");
886 /* Get NameOwnerChange messages */
887 dbus_bus_add_match(m
->api_bus
,
889 "sender='"DBUS_SERVICE_DBUS
"',"
890 "interface='"DBUS_INTERFACE_DBUS
"',"
891 "member='NameOwnerChanged',"
892 "path='"DBUS_PATH_DBUS
"'",
895 if (dbus_error_is_set(&error
)) {
896 log_error("Failed to register match: %s", error
.message
);
901 /* Get activation requests */
902 dbus_bus_add_match(m
->api_bus
,
904 "sender='"DBUS_SERVICE_DBUS
"',"
905 "interface='org.freedesktop.systemd1.Activator',"
906 "member='ActivationRequest',"
907 "path='"DBUS_PATH_DBUS
"'",
910 if (dbus_error_is_set(&error
)) {
911 log_error("Failed to register match: %s", error
.message
);
916 if ((r
= request_name(m
)) < 0)
919 if ((r
= query_name_list(m
)) < 0)
922 if (m
->api_bus
!= m
->system_bus
) {
924 log_debug("Successfully connected to API D-Bus bus %s as %s",
925 strnull((id
= dbus_connection_get_server_id(m
->api_bus
))),
926 strnull(dbus_bus_get_unique_name(m
->api_bus
)));
934 dbus_error_free(&error
);
939 static int bus_init_private(Manager
*m
) {
942 const char *const external_only
[] = {
949 dbus_error_init(&error
);
954 /* We want the private bus only when running as init */
958 if (!(m
->private_bus
= dbus_server_listen("unix:path=/dev/.run/systemd/private", &error
))) {
959 log_error("Failed to create private D-Bus server: %s", error
.message
);
964 if (!dbus_server_set_auth_mechanisms(m
->private_bus
, (const char**) external_only
) ||
965 !dbus_server_set_watch_functions(m
->private_bus
, bus_add_watch
, bus_remove_watch
, bus_toggle_watch
, m
, NULL
) ||
966 !dbus_server_set_timeout_functions(m
->private_bus
, bus_add_timeout
, bus_remove_timeout
, bus_toggle_timeout
, m
, NULL
)) {
967 log_error("Not enough memory");
972 dbus_server_set_new_connection_function(m
->private_bus
, bus_new_connection
, m
, NULL
);
974 log_debug("Successfully created private D-Bus server.");
980 dbus_error_free(&error
);
985 int bus_init(Manager
*m
, bool try_bus_connect
) {
988 if (set_ensure_allocated(&m
->bus_connections
, trivial_hash_func
, trivial_compare_func
) < 0 ||
989 set_ensure_allocated(&m
->bus_connections_for_dispatch
, trivial_hash_func
, trivial_compare_func
) < 0) {
990 log_error("Not enough memory");
994 if (m
->name_data_slot
< 0)
995 if (!dbus_pending_call_allocate_data_slot(&m
->name_data_slot
)) {
996 log_error("Not enough memory");
1000 if (m
->subscribed_data_slot
< 0)
1001 if (!dbus_connection_allocate_data_slot(&m
->subscribed_data_slot
)) {
1002 log_error("Not enough memory");
1006 if (try_bus_connect
) {
1007 if ((r
= bus_init_system(m
)) < 0 ||
1008 (r
= bus_init_api(m
)) < 0)
1012 if ((r
= bus_init_private(m
)) < 0)
1018 static void shutdown_connection(Manager
*m
, DBusConnection
*c
) {
1023 HASHMAP_FOREACH(j
, m
->jobs
, i
)
1025 free(j
->bus_client
);
1026 j
->bus_client
= NULL
;
1031 set_remove(m
->bus_connections
, c
);
1032 set_remove(m
->bus_connections_for_dispatch
, c
);
1034 if ((s
= BUS_CONNECTION_SUBSCRIBED(m
, c
))) {
1037 while ((t
= set_steal_first(s
)))
1043 if (m
->queued_message_connection
== c
) {
1044 m
->queued_message_connection
= NULL
;
1046 if (m
->queued_message
) {
1047 dbus_message_unref(m
->queued_message
);
1048 m
->queued_message
= NULL
;
1052 dbus_connection_set_dispatch_status_function(c
, NULL
, NULL
, NULL
);
1053 dbus_connection_flush(c
);
1054 dbus_connection_close(c
);
1055 dbus_connection_unref(c
);
1058 static void bus_done_api(Manager
*m
) {
1062 if (m
->system_bus
== m
->api_bus
)
1063 m
->system_bus
= NULL
;
1065 shutdown_connection(m
, m
->api_bus
);
1070 if (m
->queued_message
) {
1071 dbus_message_unref(m
->queued_message
);
1072 m
->queued_message
= NULL
;
1076 static void bus_done_system(Manager
*m
) {
1079 if (m
->system_bus
== m
->api_bus
)
1082 if (m
->system_bus
) {
1083 shutdown_connection(m
, m
->system_bus
);
1084 m
->system_bus
= NULL
;
1088 static void bus_done_private(Manager
*m
) {
1090 if (m
->private_bus
) {
1091 dbus_server_disconnect(m
->private_bus
);
1092 dbus_server_unref(m
->private_bus
);
1093 m
->private_bus
= NULL
;
1097 void bus_done(Manager
*m
) {
1102 bus_done_private(m
);
1104 while ((c
= set_steal_first(m
->bus_connections
)))
1105 shutdown_connection(m
, c
);
1107 while ((c
= set_steal_first(m
->bus_connections_for_dispatch
)))
1108 shutdown_connection(m
, c
);
1110 set_free(m
->bus_connections
);
1111 set_free(m
->bus_connections_for_dispatch
);
1113 if (m
->name_data_slot
>= 0)
1114 dbus_pending_call_free_data_slot(&m
->name_data_slot
);
1116 if (m
->subscribed_data_slot
>= 0)
1117 dbus_connection_free_data_slot(&m
->subscribed_data_slot
);
1120 static void query_pid_pending_cb(DBusPendingCall
*pending
, void *userdata
) {
1121 Manager
*m
= userdata
;
1126 dbus_error_init(&error
);
1128 assert_se(name
= BUS_PENDING_CALL_NAME(m
, pending
));
1129 assert_se(reply
= dbus_pending_call_steal_reply(pending
));
1131 switch (dbus_message_get_type(reply
)) {
1133 case DBUS_MESSAGE_TYPE_ERROR
:
1135 assert_se(dbus_set_error_from_message(&error
, reply
));
1136 log_warning("GetConnectionUnixProcessID() failed: %s", error
.message
);
1139 case DBUS_MESSAGE_TYPE_METHOD_RETURN
: {
1142 if (!dbus_message_get_args(reply
,
1144 DBUS_TYPE_UINT32
, &r
,
1145 DBUS_TYPE_INVALID
)) {
1146 log_error("Failed to parse GetConnectionUnixProcessID() reply: %s", error
.message
);
1150 manager_dispatch_bus_query_pid_done(m
, name
, (pid_t
) r
);
1155 assert_not_reached("Invalid reply message");
1158 dbus_message_unref(reply
);
1159 dbus_error_free(&error
);
1162 int bus_query_pid(Manager
*m
, const char *name
) {
1163 DBusMessage
*message
= NULL
;
1164 DBusPendingCall
*pending
= NULL
;
1170 if (!(message
= dbus_message_new_method_call(
1173 DBUS_INTERFACE_DBUS
,
1174 "GetConnectionUnixProcessID")))
1177 if (!(dbus_message_append_args(
1179 DBUS_TYPE_STRING
, &name
,
1180 DBUS_TYPE_INVALID
)))
1183 if (!dbus_connection_send_with_reply(m
->api_bus
, message
, &pending
, -1))
1186 if (!(n
= strdup(name
)))
1189 if (!dbus_pending_call_set_data(pending
, m
->name_data_slot
, n
, free
))
1194 if (!dbus_pending_call_set_notify(pending
, query_pid_pending_cb
, m
, NULL
))
1197 dbus_message_unref(message
);
1198 dbus_pending_call_unref(pending
);
1206 dbus_pending_call_cancel(pending
);
1207 dbus_pending_call_unref(pending
);
1211 dbus_message_unref(message
);
1216 DBusHandlerResult
bus_default_message_handler(
1219 DBusMessage
*message
,
1220 const char *introspection
,
1221 const char *interfaces
,
1222 const BusProperty
*properties
) {
1225 DBusMessage
*reply
= NULL
;
1232 dbus_error_init(&error
);
1234 if (dbus_message_is_method_call(message
, "org.freedesktop.DBus.Introspectable", "Introspect") && introspection
) {
1236 if (!(reply
= dbus_message_new_method_return(message
)))
1239 if (!dbus_message_append_args(reply
, DBUS_TYPE_STRING
, &introspection
, DBUS_TYPE_INVALID
))
1242 } else if (dbus_message_is_method_call(message
, "org.freedesktop.DBus.Properties", "Get") && properties
) {
1243 const char *interface
, *property
;
1244 const BusProperty
*p
;
1246 if (!dbus_message_get_args(
1249 DBUS_TYPE_STRING
, &interface
,
1250 DBUS_TYPE_STRING
, &property
,
1252 return bus_send_error_reply(m
, c
, message
, &error
, -EINVAL
);
1254 for (p
= properties
; p
->property
; p
++)
1255 if (streq(p
->interface
, interface
) && streq(p
->property
, property
))
1259 DBusMessageIter iter
, sub
;
1261 if (!(reply
= dbus_message_new_method_return(message
)))
1264 dbus_message_iter_init_append(reply
, &iter
);
1266 if (!dbus_message_iter_open_container(&iter
, DBUS_TYPE_VARIANT
, p
->signature
, &sub
))
1269 if ((r
= p
->append(m
, &sub
, property
, (void*) p
->data
)) < 0) {
1274 dbus_message_unref(reply
);
1275 return bus_send_error_reply(m
, c
, message
, NULL
, r
);
1278 if (!dbus_message_iter_close_container(&iter
, &sub
))
1281 if (!nulstr_contains(interfaces
, interface
))
1282 dbus_set_error_const(&error
, DBUS_ERROR_UNKNOWN_INTERFACE
, "Unknown interface");
1284 dbus_set_error_const(&error
, DBUS_ERROR_UNKNOWN_PROPERTY
, "Unknown property");
1286 return bus_send_error_reply(m
, c
, message
, &error
, -EINVAL
);
1289 } else if (dbus_message_is_method_call(message
, "org.freedesktop.DBus.Properties", "GetAll") && properties
) {
1290 const char *interface
;
1291 const BusProperty
*p
;
1292 DBusMessageIter iter
, sub
, sub2
, sub3
;
1294 if (!dbus_message_get_args(
1297 DBUS_TYPE_STRING
, &interface
,
1299 return bus_send_error_reply(m
, c
, message
, &error
, -EINVAL
);
1301 if (interface
[0] && !nulstr_contains(interfaces
, interface
)) {
1302 dbus_set_error_const(&error
, DBUS_ERROR_UNKNOWN_INTERFACE
, "Unknown interface");
1303 return bus_send_error_reply(m
, c
, message
, &error
, -EINVAL
);
1306 if (!(reply
= dbus_message_new_method_return(message
)))
1309 dbus_message_iter_init_append(reply
, &iter
);
1311 if (!dbus_message_iter_open_container(&iter
, DBUS_TYPE_ARRAY
, "{sv}", &sub
))
1314 for (p
= properties
; p
->property
; p
++) {
1315 if (interface
[0] && !streq(p
->interface
, interface
))
1318 if (!dbus_message_iter_open_container(&sub
, DBUS_TYPE_DICT_ENTRY
, NULL
, &sub2
) ||
1319 !dbus_message_iter_append_basic(&sub2
, DBUS_TYPE_STRING
, &p
->property
) ||
1320 !dbus_message_iter_open_container(&sub2
, DBUS_TYPE_VARIANT
, p
->signature
, &sub3
))
1323 if ((r
= p
->append(m
, &sub3
, p
->property
, (void*) p
->data
)) < 0) {
1328 dbus_message_unref(reply
);
1329 return bus_send_error_reply(m
, c
, message
, NULL
, r
);
1332 if (!dbus_message_iter_close_container(&sub2
, &sub3
) ||
1333 !dbus_message_iter_close_container(&sub
, &sub2
))
1337 if (!dbus_message_iter_close_container(&iter
, &sub
))
1340 } else if (dbus_message_is_method_call(message
, "org.freedesktop.DBus.Properties", "Set") && properties
) {
1341 const char *interface
, *property
;
1342 DBusMessageIter iter
;
1343 const BusProperty
*p
;
1345 if (!dbus_message_iter_init(message
, &iter
) ||
1346 dbus_message_iter_get_arg_type(&iter
) != DBUS_TYPE_STRING
)
1347 return bus_send_error_reply(m
, c
, message
, NULL
, -EINVAL
);
1349 dbus_message_iter_get_basic(&iter
, &interface
);
1351 if (!dbus_message_iter_next(&iter
) ||
1352 dbus_message_iter_get_arg_type(&iter
) != DBUS_TYPE_STRING
)
1353 return bus_send_error_reply(m
, c
, message
, NULL
, -EINVAL
);
1355 dbus_message_iter_get_basic(&iter
, &property
);
1357 if (!dbus_message_iter_next(&iter
) ||
1358 dbus_message_iter_get_arg_type(&iter
) != DBUS_TYPE_VARIANT
||
1359 dbus_message_iter_has_next(&iter
))
1360 return bus_send_error_reply(m
, c
, message
, NULL
, -EINVAL
);
1362 for (p
= properties
; p
->property
; p
++)
1363 if (streq(p
->interface
, interface
) && streq(p
->property
, property
))
1367 DBusMessageIter sub
;
1370 dbus_message_iter_recurse(&iter
, &sub
);
1372 if (!(sig
= dbus_message_iter_get_signature(&sub
)))
1375 if (!streq(sig
, p
->signature
)) {
1377 return bus_send_error_reply(m
, c
, message
, NULL
, -EINVAL
);
1382 if ((r
= p
->set(m
, &sub
, property
)) < 0) {
1385 return bus_send_error_reply(m
, c
, message
, NULL
, r
);
1388 if (!(reply
= dbus_message_new_method_return(message
)))
1392 dbus_set_error_const(&error
, DBUS_ERROR_PROPERTY_READ_ONLY
, "Property read-only");
1393 else if (!nulstr_contains(interfaces
, interface
))
1394 dbus_set_error_const(&error
, DBUS_ERROR_UNKNOWN_INTERFACE
, "Unknown interface");
1396 dbus_set_error_const(&error
, DBUS_ERROR_UNKNOWN_PROPERTY
, "Unknown property");
1398 return bus_send_error_reply(m
, c
, message
, &error
, -EINVAL
);
1401 } else if (!nulstr_contains(interfaces
, dbus_message_get_interface(message
))) {
1402 dbus_set_error_const(&error
, DBUS_ERROR_UNKNOWN_INTERFACE
, "Unknown interface");
1403 return bus_send_error_reply(m
, c
, message
, &error
, -EINVAL
);
1407 if (!dbus_connection_send(c
, reply
, NULL
))
1410 dbus_message_unref(reply
);
1411 return DBUS_HANDLER_RESULT_HANDLED
;
1414 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED
;
1418 dbus_message_unref(reply
);
1420 dbus_error_free(&error
);
1422 return DBUS_HANDLER_RESULT_NEED_MEMORY
;
1425 static const char *error_to_dbus(int error
) {
1430 return DBUS_ERROR_INVALID_ARGS
;
1433 return DBUS_ERROR_NO_MEMORY
;
1437 return DBUS_ERROR_ACCESS_DENIED
;
1440 return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN
;
1443 return DBUS_ERROR_FILE_NOT_FOUND
;
1446 return DBUS_ERROR_FILE_EXISTS
;
1450 return DBUS_ERROR_TIMEOUT
;
1453 return DBUS_ERROR_IO_ERROR
;
1458 return DBUS_ERROR_DISCONNECTED
;
1461 return DBUS_ERROR_FAILED
;
1464 DBusHandlerResult
bus_send_error_reply(Manager
*m
, DBusConnection
*c
, DBusMessage
*message
, DBusError
*berror
, int error
) {
1465 DBusMessage
*reply
= NULL
;
1466 const char *name
, *text
;
1468 if (berror
&& dbus_error_is_set(berror
)) {
1469 name
= berror
->name
;
1470 text
= berror
->message
;
1472 name
= error_to_dbus(error
);
1473 text
= strerror(-error
);
1476 if (!(reply
= dbus_message_new_error(message
, name
, text
)))
1479 if (!dbus_connection_send(c
, reply
, NULL
))
1482 dbus_message_unref(reply
);
1485 dbus_error_free(berror
);
1487 return DBUS_HANDLER_RESULT_HANDLED
;
1491 dbus_message_unref(reply
);
1494 dbus_error_free(berror
);
1496 return DBUS_HANDLER_RESULT_NEED_MEMORY
;
1499 int bus_broadcast(Manager
*m
, DBusMessage
*message
) {
1507 SET_FOREACH(c
, m
->bus_connections_for_dispatch
, i
)
1508 if (c
!= m
->system_bus
|| m
->running_as
== MANAGER_SYSTEM
)
1509 oom
= !dbus_connection_send(c
, message
, NULL
);
1511 SET_FOREACH(c
, m
->bus_connections
, i
)
1512 if (c
!= m
->system_bus
|| m
->running_as
== MANAGER_SYSTEM
)
1513 oom
= !dbus_connection_send(c
, message
, NULL
);
1515 return oom
? -ENOMEM
: 0;
1518 int bus_property_append_string(Manager
*m
, DBusMessageIter
*i
, const char *property
, void *data
) {
1519 const char *t
= data
;
1528 if (!dbus_message_iter_append_basic(i
, DBUS_TYPE_STRING
, &t
))
1534 int bus_property_append_strv(Manager
*m
, DBusMessageIter
*i
, const char *property
, void *data
) {
1535 DBusMessageIter sub
;
1542 if (!dbus_message_iter_open_container(i
, DBUS_TYPE_ARRAY
, "s", &sub
))
1546 if (!dbus_message_iter_append_basic(&sub
, DBUS_TYPE_STRING
, t
))
1549 if (!dbus_message_iter_close_container(i
, &sub
))
1555 int bus_property_append_bool(Manager
*m
, DBusMessageIter
*i
, const char *property
, void *data
) {
1566 if (!dbus_message_iter_append_basic(i
, DBUS_TYPE_BOOLEAN
, &db
))
1572 int bus_property_append_uint64(Manager
*m
, DBusMessageIter
*i
, const char *property
, void *data
) {
1578 /* Let's ensure that pid_t is actually 64bit, and hence this
1579 * function can be used for usec_t */
1580 assert_cc(sizeof(uint64_t) == sizeof(usec_t
));
1582 if (!dbus_message_iter_append_basic(i
, DBUS_TYPE_UINT64
, data
))
1588 int bus_property_append_uint32(Manager
*m
, DBusMessageIter
*i
, const char *property
, void *data
) {
1594 /* Let's ensure that pid_t and mode_t is actually 32bit, and
1595 * hence this function can be used for pid_t/mode_t */
1596 assert_cc(sizeof(uint32_t) == sizeof(pid_t
));
1597 assert_cc(sizeof(uint32_t) == sizeof(mode_t
));
1598 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
1600 if (!dbus_message_iter_append_basic(i
, DBUS_TYPE_UINT32
, data
))
1606 int bus_property_append_int32(Manager
*m
, DBusMessageIter
*i
, const char *property
, void *data
) {
1612 assert_cc(sizeof(int32_t) == sizeof(int));
1614 if (!dbus_message_iter_append_basic(i
, DBUS_TYPE_INT32
, data
))
1620 int bus_property_append_size(Manager
*m
, DBusMessageIter
*i
, const char *property
, void *data
) {
1628 u
= (uint64_t) *(size_t*) data
;
1630 if (!dbus_message_iter_append_basic(i
, DBUS_TYPE_UINT64
, &u
))
1636 int bus_property_append_ul(Manager
*m
, DBusMessageIter
*i
, const char *property
, void *data
) {
1644 u
= (uint64_t) *(unsigned long*) data
;
1646 if (!dbus_message_iter_append_basic(i
, DBUS_TYPE_UINT64
, &u
))
1652 int bus_parse_strv(DBusMessage
*m
, char ***_l
) {
1653 DBusMessageIter iter
, sub
;
1654 unsigned n
= 0, i
= 0;
1660 if (!dbus_message_iter_init(m
, &iter
) ||
1661 dbus_message_iter_get_arg_type(&iter
) != DBUS_TYPE_ARRAY
||
1662 dbus_message_iter_get_element_type(&iter
) != DBUS_TYPE_STRING
)
1665 dbus_message_iter_recurse(&iter
, &sub
);
1667 while (dbus_message_iter_get_arg_type(&sub
) != DBUS_TYPE_INVALID
) {
1669 dbus_message_iter_next(&sub
);
1672 if (!(l
= new(char*, n
+1)))
1675 assert_se(dbus_message_iter_init(m
, &iter
));
1676 dbus_message_iter_recurse(&iter
, &sub
);
1678 while (dbus_message_iter_get_arg_type(&sub
) != DBUS_TYPE_INVALID
) {
1681 assert_se(dbus_message_iter_get_arg_type(&sub
) == DBUS_TYPE_STRING
);
1682 dbus_message_iter_get_basic(&sub
, &s
);
1684 if (!(l
[i
++] = strdup(s
))) {
1689 dbus_message_iter_next(&sub
);
1701 bool bus_has_subscriber(Manager
*m
) {
1707 SET_FOREACH(c
, m
->bus_connections_for_dispatch
, i
)
1708 if (bus_connection_has_subscriber(m
, c
))
1711 SET_FOREACH(c
, m
->bus_connections
, i
)
1712 if (bus_connection_has_subscriber(m
, c
))
1718 bool bus_connection_has_subscriber(Manager
*m
, DBusConnection
*c
) {
1722 return !set_isempty(BUS_CONNECTION_SUBSCRIBED(m
, c
));
1725 DBusMessage
* bus_properties_changed_new(const char *path
, const char *interface
, const char *properties
) {
1727 DBusMessageIter iter
, sub
;
1733 if (!(m
= dbus_message_new_signal(path
, "org.freedesktop.DBus.Properties", "PropertiesChanged")))
1736 dbus_message_iter_init_append(m
, &iter
);
1738 /* We won't send any property values, since they might be
1739 * large and sometimes not cheap to generated */
1741 if (!dbus_message_iter_append_basic(&iter
, DBUS_TYPE_STRING
, &interface
) ||
1742 !dbus_message_iter_open_container(&iter
, DBUS_TYPE_ARRAY
, "{sv}", &sub
) ||
1743 !dbus_message_iter_close_container(&iter
, &sub
) ||
1744 !dbus_message_iter_open_container(&iter
, DBUS_TYPE_ARRAY
, "s", &sub
))
1747 NULSTR_FOREACH(i
, properties
)
1748 if (!dbus_message_iter_append_basic(&sub
, DBUS_TYPE_STRING
, &i
))
1751 if (!dbus_message_iter_close_container(&iter
, &sub
))
1758 dbus_message_unref(m
);