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 Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <sys/epoll.h>
31 #include "dbus-unit.h"
33 #include "dbus-manager.h"
34 #include "dbus-execute.h"
35 #include "dbus-kill.h"
36 #include "dbus-cgroup.h"
40 #include "bus-error.h"
41 #include "bus-common-errors.h"
43 #include "bus-internal.h"
44 #include "selinux-access.h"
46 #define CONNECTIONS_MAX 4096
48 static void destroy_bus(Manager *m, sd_bus **bus);
50 int bus_send_queued_message(Manager *m) {
55 if (!m->queued_message)
58 assert(m->queued_message_bus);
60 /* If we cannot get rid of this message we won't dispatch any
61 * D-Bus messages, so that we won't end up wanting to queue
64 r = sd_bus_send(m->queued_message_bus, m->queued_message, NULL);
66 log_warning_errno(r, "Failed to send queued message: %m");
68 m->queued_message = sd_bus_message_unref(m->queued_message);
69 m->queued_message_bus = sd_bus_unref(m->queued_message_bus);
74 static int signal_agent_released(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
75 Manager *m = userdata;
83 r = sd_bus_message_read(message, "s", &cgroup);
85 bus_log_parse_error(r);
89 manager_notify_cgroup_empty(m, cgroup);
91 /* only forward to system bus if running as system instance */
92 if (m->running_as != SYSTEMD_SYSTEM || !m->system_bus)
95 r = sd_bus_message_rewind(message, 1);
99 r = sd_bus_send(m->system_bus, message, NULL);
103 log_warning_errno(r, "Failed to forward Released message: %m");
107 static int signal_disconnected(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
108 Manager *m = userdata;
114 if (bus == m->api_bus)
115 destroy_bus(m, &m->api_bus);
116 if (bus == m->system_bus)
117 destroy_bus(m, &m->system_bus);
118 if (set_remove(m->private_buses, bus)) {
119 log_debug("Got disconnect on private connection.");
120 destroy_bus(m, &bus);
126 static int signal_name_owner_changed(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
127 const char *name, *old_owner, *new_owner;
128 Manager *m = userdata;
135 r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner);
137 bus_log_parse_error(r);
141 manager_dispatch_bus_name_owner_changed(
143 isempty(old_owner) ? NULL : old_owner,
144 isempty(new_owner) ? NULL : new_owner);
149 static int signal_activation_request(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
150 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
151 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
152 Manager *m = userdata;
161 r = sd_bus_message_read(message, "s", &name);
163 bus_log_parse_error(r);
167 if (manager_unit_inactive_or_pending(m, SPECIAL_DBUS_SERVICE) ||
168 manager_unit_inactive_or_pending(m, SPECIAL_DBUS_SOCKET)) {
169 r = sd_bus_error_setf(&error, BUS_ERROR_SHUTTING_DOWN, "Refusing activation, D-Bus is shutting down.");
173 r = manager_load_unit(m, name, NULL, &error, &u);
177 if (u->refuse_manual_start) {
178 r = sd_bus_error_setf(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, %s may be requested by dependency only.", u->id);
182 r = manager_add_job(m, JOB_START, u, JOB_REPLACE, true, &error, NULL);
186 /* Successfully queued, that's it for us */
190 if (!sd_bus_error_is_set(&error))
191 sd_bus_error_set_errno(&error, r);
193 log_debug("D-Bus activation failed for %s: %s", name, bus_error_message(&error, r));
195 r = sd_bus_message_new_signal(bus, &reply, "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure");
197 bus_log_create_error(r);
201 r = sd_bus_message_append(reply, "sss", name, error.name, error.message);
203 bus_log_create_error(r);
207 r = sd_bus_send_to(bus, reply, "org.freedesktop.DBus", NULL);
209 return log_error_errno(r, "Failed to respond with to bus activation request: %m");
215 static int mac_selinux_filter(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
216 Manager *m = userdata;
217 const char *verb, *path;
225 /* Our own method calls are all protected individually with
226 * selinux checks, but the built-in interfaces need to be
229 if (sd_bus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Set"))
231 else if (sd_bus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", NULL) ||
232 sd_bus_message_is_method_call(message, "org.freedesktop.DBus.Properties", NULL) ||
233 sd_bus_message_is_method_call(message, "org.freedesktop.DBus.ObjectManager", NULL) ||
234 sd_bus_message_is_method_call(message, "org.freedesktop.DBus.Peer", NULL))
239 path = sd_bus_message_get_path(message);
241 if (object_path_startswith("/org/freedesktop/systemd1", path)) {
243 r = mac_selinux_access_check(message, verb, error);
250 if (streq_ptr(path, "/org/freedesktop/systemd1/unit/self")) {
251 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
254 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
258 r = sd_bus_creds_get_pid(creds, &pid);
262 u = manager_get_unit_by_pid(m, pid);
264 r = manager_get_job_from_dbus_path(m, path, &j);
268 manager_load_unit_from_dbus_path(m, path, NULL, &u);
274 r = mac_selinux_unit_access_check(u, message, verb, error);
282 static int bus_job_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
283 Manager *m = userdata;
293 r = manager_get_job_from_dbus_path(m, path, &j);
301 static int find_unit(Manager *m, sd_bus *bus, const char *path, Unit **unit, sd_bus_error *error) {
309 if (streq_ptr(path, "/org/freedesktop/systemd1/unit/self")) {
310 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
311 sd_bus_message *message;
314 message = sd_bus_get_current_message(bus);
318 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
322 r = sd_bus_creds_get_pid(creds, &pid);
326 u = manager_get_unit_by_pid(m, pid);
328 r = manager_load_unit_from_dbus_path(m, path, error, &u);
340 static int bus_unit_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
341 Manager *m = userdata;
349 return find_unit(m, bus, path, (Unit**) found, error);
352 static int bus_unit_interface_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
353 Manager *m = userdata;
363 r = find_unit(m, bus, path, &u, error);
367 if (!streq_ptr(interface, UNIT_VTABLE(u)->bus_interface))
374 static int bus_unit_cgroup_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
375 Manager *m = userdata;
385 r = find_unit(m, bus, path, &u, error);
389 if (!streq_ptr(interface, UNIT_VTABLE(u)->bus_interface))
392 if (!unit_get_cgroup_context(u))
399 static int bus_cgroup_context_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
400 Manager *m = userdata;
411 r = find_unit(m, bus, path, &u, error);
415 if (!streq_ptr(interface, UNIT_VTABLE(u)->bus_interface))
418 c = unit_get_cgroup_context(u);
426 static int bus_exec_context_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
427 Manager *m = userdata;
438 r = find_unit(m, bus, path, &u, error);
442 if (!streq_ptr(interface, UNIT_VTABLE(u)->bus_interface))
445 c = unit_get_exec_context(u);
453 static int bus_kill_context_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
454 Manager *m = userdata;
465 r = find_unit(m, bus, path, &u, error);
469 if (!streq_ptr(interface, UNIT_VTABLE(u)->bus_interface))
472 c = unit_get_kill_context(u);
480 static int bus_job_enumerate(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
481 _cleanup_free_ char **l = NULL;
482 Manager *m = userdata;
487 l = new0(char*, hashmap_size(m->jobs)+1);
491 HASHMAP_FOREACH(j, m->jobs, i) {
492 l[k] = job_dbus_path(j);
499 assert(hashmap_size(m->jobs) == k);
507 static int bus_unit_enumerate(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
508 _cleanup_free_ char **l = NULL;
509 Manager *m = userdata;
514 l = new0(char*, hashmap_size(m->units)+1);
518 HASHMAP_FOREACH(u, m->units, i) {
519 l[k] = unit_dbus_path(u);
532 static int bus_setup_api_vtables(Manager *m, sd_bus *bus) {
540 r = sd_bus_add_filter(bus, NULL, mac_selinux_filter, m);
542 return log_error_errno(r, "Failed to add SELinux access filter: %m");
545 r = sd_bus_add_object_vtable(bus, NULL, "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", bus_manager_vtable, m);
547 return log_error_errno(r, "Failed to register Manager vtable: %m");
549 r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/job", "org.freedesktop.systemd1.Job", bus_job_vtable, bus_job_find, m);
551 return log_error_errno(r, "Failed to register Job vtable: %m");
553 r = sd_bus_add_node_enumerator(bus, NULL, "/org/freedesktop/systemd1/job", bus_job_enumerate, m);
555 return log_error_errno(r, "Failed to add job enumerator: %m");
557 r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/unit", "org.freedesktop.systemd1.Unit", bus_unit_vtable, bus_unit_find, m);
559 return log_error_errno(r, "Failed to register Unit vtable: %m");
561 r = sd_bus_add_node_enumerator(bus, NULL, "/org/freedesktop/systemd1/unit", bus_unit_enumerate, m);
563 return log_error_errno(r, "Failed to add job enumerator: %m");
565 for (t = 0; t < _UNIT_TYPE_MAX; t++) {
566 r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/unit", unit_vtable[t]->bus_interface, unit_vtable[t]->bus_vtable, bus_unit_interface_find, m);
568 return log_error_errno(r, "Failed to register type specific vtable for %s: %m", unit_vtable[t]->bus_interface);
570 if (unit_vtable[t]->cgroup_context_offset > 0) {
571 r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/unit", unit_vtable[t]->bus_interface, bus_unit_cgroup_vtable, bus_unit_cgroup_find, m);
573 return log_error_errno(r, "Failed to register control group unit vtable for %s: %m", unit_vtable[t]->bus_interface);
575 r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/unit", unit_vtable[t]->bus_interface, bus_cgroup_vtable, bus_cgroup_context_find, m);
577 return log_error_errno(r, "Failed to register control group vtable for %s: %m", unit_vtable[t]->bus_interface);
580 if (unit_vtable[t]->exec_context_offset > 0) {
581 r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/unit", unit_vtable[t]->bus_interface, bus_exec_vtable, bus_exec_context_find, m);
583 return log_error_errno(r, "Failed to register execute vtable for %s: %m", unit_vtable[t]->bus_interface);
586 if (unit_vtable[t]->kill_context_offset > 0) {
587 r = sd_bus_add_fallback_vtable(bus, NULL, "/org/freedesktop/systemd1/unit", unit_vtable[t]->bus_interface, bus_kill_vtable, bus_kill_context_find, m);
589 return log_error_errno(r, "Failed to register kill vtable for %s: %m", unit_vtable[t]->bus_interface);
596 static int bus_setup_disconnected_match(Manager *m, sd_bus *bus) {
602 r = sd_bus_add_match(
605 "sender='org.freedesktop.DBus.Local',"
607 "path='/org/freedesktop/DBus/Local',"
608 "interface='org.freedesktop.DBus.Local',"
609 "member='Disconnected'",
610 signal_disconnected, m);
613 return log_error_errno(r, "Failed to register match for Disconnected message: %m");
618 static int bus_on_connection(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
619 _cleanup_bus_unref_ sd_bus *bus = NULL;
620 _cleanup_close_ int nfd = -1;
621 Manager *m = userdata;
628 nfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
630 log_warning_errno(errno, "Failed to accept private connection, ignoring: %m");
634 if (set_size(m->private_buses) >= CONNECTIONS_MAX) {
635 log_warning("Too many concurrent connections, refusing");
639 r = set_ensure_allocated(&m->private_buses, NULL);
645 r = sd_bus_new(&bus);
647 log_warning_errno(r, "Failed to allocate new private connection bus: %m");
651 r = sd_bus_set_fd(bus, nfd, nfd);
653 log_warning_errno(r, "Failed to set fd on new connection bus: %m");
659 r = bus_check_peercred(bus);
661 log_warning_errno(r, "Incoming private connection from unprivileged client, refusing: %m");
665 assert_se(sd_id128_randomize(&id) >= 0);
667 r = sd_bus_set_server(bus, 1, id);
669 log_warning_errno(r, "Failed to enable server support for new connection bus: %m");
673 r = sd_bus_start(bus);
675 log_warning_errno(r, "Failed to start new connection bus: %m");
679 r = sd_bus_attach_event(bus, m->event, SD_EVENT_PRIORITY_NORMAL);
681 log_warning_errno(r, "Failed to attach new connection bus to event loop: %m");
685 if (m->running_as == SYSTEMD_SYSTEM) {
686 /* When we run as system instance we get the Released
687 * signal via a direct connection */
689 r = sd_bus_add_match(
693 "interface='org.freedesktop.systemd1.Agent',"
695 "path='/org/freedesktop/systemd1/agent'",
696 signal_agent_released, m);
699 log_warning_errno(r, "Failed to register Released match on new connection bus: %m");
704 r = bus_setup_disconnected_match(m, bus);
708 r = bus_setup_api_vtables(m, bus);
710 log_warning_errno(r, "Failed to set up API vtables on new connection bus: %m");
714 r = set_put(m->private_buses, bus);
716 log_warning_errno(r, "Failed to add new conenction bus to set: %m");
722 log_debug("Accepted new private connection.");
727 static int bus_list_names(Manager *m, sd_bus *bus) {
728 _cleanup_strv_free_ char **names = NULL;
735 r = sd_bus_list_names(bus, &names, NULL);
737 return log_error_errno(r, "Failed to get initial list of names: %m");
739 /* This is a bit hacky, we say the owner of the name is the
740 * name itself, because we don't want the extra traffic to
741 * figure out the real owner. */
742 STRV_FOREACH(i, names)
743 manager_dispatch_bus_name_owner_changed(m, *i, NULL, *i);
748 static int bus_setup_api(Manager *m, sd_bus *bus) {
754 /* Let's make sure we have enough credential bits so that we can make security and selinux decisions */
755 r = sd_bus_negotiate_creds(bus, 1,
756 SD_BUS_CREDS_PID|SD_BUS_CREDS_UID|
757 SD_BUS_CREDS_EUID|SD_BUS_CREDS_EFFECTIVE_CAPS|
758 SD_BUS_CREDS_SELINUX_CONTEXT);
760 log_warning_errno(r, "Failed to enable credential passing, ignoring: %m");
762 r = bus_setup_api_vtables(m, bus);
766 r = sd_bus_add_match(
770 "sender='org.freedesktop.DBus',"
771 "path='/org/freedesktop/DBus',"
772 "interface='org.freedesktop.DBus',"
773 "member='NameOwnerChanged'",
774 signal_name_owner_changed, m);
776 log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal: %m");
778 r = sd_bus_add_match(
782 "sender='org.freedesktop.DBus',"
783 "path='/org/freedesktop/DBus',"
784 "interface='org.freedesktop.systemd1.Activator',"
785 "member='ActivationRequest'",
786 signal_activation_request, m);
788 log_warning_errno(r, "Failed to subscribe to activation signal: %m");
790 /* Allow replacing of our name, to ease implementation of
791 * reexecution, where we keep the old connection open until
792 * after the new connection is set up and the name installed
793 * to allow clients to synchronously wait for reexecution to
795 r = sd_bus_request_name(bus,"org.freedesktop.systemd1", SD_BUS_NAME_REPLACE_EXISTING|SD_BUS_NAME_ALLOW_REPLACEMENT);
797 return log_error_errno(r, "Failed to register name: %m");
799 bus_list_names(m, bus);
801 log_debug("Successfully connected to API bus.");
805 static int bus_init_api(Manager *m) {
806 _cleanup_bus_unref_ sd_bus *bus = NULL;
812 /* The API and system bus is the same if we are running in system mode */
813 if (m->running_as == SYSTEMD_SYSTEM && m->system_bus)
814 bus = sd_bus_ref(m->system_bus);
816 if (m->running_as == SYSTEMD_SYSTEM)
817 r = sd_bus_open_system(&bus);
819 r = sd_bus_open_user(&bus);
822 log_debug("Failed to connect to API bus, retrying later...");
826 r = sd_bus_attach_event(bus, m->event, SD_EVENT_PRIORITY_NORMAL);
828 log_error_errno(r, "Failed to attach API bus to event loop: %m");
832 r = bus_setup_disconnected_match(m, bus);
837 r = bus_setup_api(m, bus);
839 log_error_errno(r, "Failed to set up API bus: %m");
849 static int bus_setup_system(Manager *m, sd_bus *bus) {
855 /* On kdbus or if we are a user instance we get the Released message via the system bus */
856 if (m->running_as == SYSTEMD_USER || m->kdbus_fd >= 0) {
857 r = sd_bus_add_match(
861 "interface='org.freedesktop.systemd1.Agent',"
863 "path='/org/freedesktop/systemd1/agent'",
864 signal_agent_released, m);
866 log_warning_errno(r, "Failed to register Released match on system bus: %m");
869 log_debug("Successfully connected to system bus.");
873 static int bus_init_system(Manager *m) {
874 _cleanup_bus_unref_ sd_bus *bus = NULL;
880 /* The API and system bus is the same if we are running in system mode */
881 if (m->running_as == SYSTEMD_SYSTEM && m->api_bus) {
882 m->system_bus = sd_bus_ref(m->api_bus);
886 r = sd_bus_open_system(&bus);
888 log_debug("Failed to connect to system bus, retrying later...");
892 r = bus_setup_disconnected_match(m, bus);
896 r = sd_bus_attach_event(bus, m->event, SD_EVENT_PRIORITY_NORMAL);
898 log_error_errno(r, "Failed to attach system bus to event loop: %m");
902 r = bus_setup_system(m, bus);
904 log_error_errno(r, "Failed to set up system bus: %m");
914 static int bus_init_private(Manager *m) {
915 _cleanup_close_ int fd = -1;
916 union sockaddr_union sa = {
917 .un.sun_family = AF_UNIX
925 if (m->private_listen_fd >= 0)
928 /* We don't need the private socket if we have kdbus */
929 if (m->kdbus_fd >= 0)
932 if (m->running_as == SYSTEMD_SYSTEM) {
934 /* We want the private bus only when running as init */
938 strcpy(sa.un.sun_path, "/run/systemd/private");
939 salen = offsetof(union sockaddr_union, un.sun_path) + strlen("/run/systemd/private");
941 size_t left = sizeof(sa.un.sun_path);
942 char *p = sa.un.sun_path;
945 e = secure_getenv("XDG_RUNTIME_DIR");
947 log_error("Failed to determine XDG_RUNTIME_DIR");
951 left = strpcpy(&p, left, e);
952 left = strpcpy(&p, left, "/systemd/private");
954 salen = sizeof(sa.un) - left;
957 (void) mkdir_parents_label(sa.un.sun_path, 0755);
958 (void) unlink(sa.un.sun_path);
960 fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
962 return log_error_errno(errno, "Failed to allocate private socket: %m");
964 r = bind(fd, &sa.sa, salen);
966 return log_error_errno(errno, "Failed to bind private socket: %m");
968 r = listen(fd, SOMAXCONN);
970 return log_error_errno(errno, "Failed to make private socket listening: %m");
972 r = sd_event_add_io(m->event, &s, fd, EPOLLIN, bus_on_connection, m);
974 return log_error_errno(r, "Failed to allocate event source: %m");
976 m->private_listen_fd = fd;
977 m->private_listen_event_source = s;
980 log_debug("Successfully created private D-Bus server.");
985 int bus_init(Manager *m, bool try_bus_connect) {
988 if (try_bus_connect) {
989 r = bus_init_system(m);
998 r = bus_init_private(m);
1005 static void destroy_bus(Manager *m, sd_bus **bus) {
1015 /* Get rid of tracked clients on this bus */
1016 if (m->subscribed && sd_bus_track_get_bus(m->subscribed) == *bus)
1017 m->subscribed = sd_bus_track_unref(m->subscribed);
1019 HASHMAP_FOREACH(j, m->jobs, i)
1020 if (j->clients && sd_bus_track_get_bus(j->clients) == *bus)
1021 j->clients = sd_bus_track_unref(j->clients);
1023 /* Get rid of queued message on this bus */
1024 if (m->queued_message_bus == *bus) {
1025 m->queued_message_bus = sd_bus_unref(m->queued_message_bus);
1027 if (m->queued_message)
1028 m->queued_message = sd_bus_message_unref(m->queued_message);
1031 /* Possibly flush unwritten data, but only if we are
1032 * unprivileged, since we don't want to sync here */
1033 if (m->running_as != SYSTEMD_SYSTEM)
1036 /* And destroy the object */
1038 *bus = sd_bus_unref(*bus);
1041 void bus_done(Manager *m) {
1047 destroy_bus(m, &m->api_bus);
1049 destroy_bus(m, &m->system_bus);
1050 while ((b = set_steal_first(m->private_buses)))
1053 set_free(m->private_buses);
1054 m->private_buses = NULL;
1056 m->subscribed = sd_bus_track_unref(m->subscribed);
1057 strv_free(m->deserialized_subscribed);
1058 m->deserialized_subscribed = NULL;
1060 if (m->private_listen_event_source)
1061 m->private_listen_event_source = sd_event_source_unref(m->private_listen_event_source);
1063 m->private_listen_fd = safe_close(m->private_listen_fd);
1065 bus_verify_polkit_async_registry_free(m->polkit_registry);
1068 int bus_fdset_add_all(Manager *m, FDSet *fds) {
1076 /* When we are about to reexecute we add all D-Bus fds to the
1077 * set to pass over to the newly executed systemd. They won't
1078 * be used there however, except thatt they are closed at the
1079 * very end of deserialization, those making it possible for
1080 * clients to synchronously wait for systemd to reexec by
1081 * simply waiting for disconnection */
1084 fd = sd_bus_get_fd(m->api_bus);
1086 fd = fdset_put_dup(fds, fd);
1092 SET_FOREACH(b, m->private_buses, i) {
1093 fd = sd_bus_get_fd(b);
1095 fd = fdset_put_dup(fds, fd);
1101 /* We don't offer any APIs on the system bus (well, unless it
1102 * is the same as the API bus) hence we don't bother with it
1108 int bus_foreach_bus(
1110 sd_bus_track *subscribed2,
1111 int (*send_message)(sd_bus *bus, void *userdata),
1118 /* Send to all direct busses, unconditionally */
1119 SET_FOREACH(b, m->private_buses, i) {
1120 r = send_message(b, userdata);
1125 /* Send to API bus, but only if somebody is subscribed */
1126 if (sd_bus_track_count(m->subscribed) > 0 ||
1127 sd_bus_track_count(subscribed2) > 0) {
1128 r = send_message(m->api_bus, userdata);
1136 void bus_track_serialize(sd_bus_track *t, FILE *f) {
1141 for (n = sd_bus_track_first(t); n; n = sd_bus_track_next(t))
1142 fprintf(f, "subscribed=%s\n", n);
1145 int bus_track_deserialize_item(char ***l, const char *line) {
1152 e = startswith(line, "subscribed=");
1156 r = strv_extend(l, e);
1163 int bus_track_coldplug(Manager *m, sd_bus_track **t, char ***l) {
1170 if (!strv_isempty(*l) && m->api_bus) {
1174 r = sd_bus_track_new(m->api_bus, t, NULL, NULL);
1180 STRV_FOREACH(i, *l) {
1183 k = sd_bus_track_add_name(*t, *i);
1195 int bus_verify_manage_units_async(Manager *m, sd_bus_message *call, sd_bus_error *error) {
1196 return bus_verify_polkit_async(call, CAP_SYS_ADMIN, "org.freedesktop.systemd1.manage-units", false, UID_INVALID, &m->polkit_registry, error);
1199 /* Same as bus_verify_manage_unit_async(), but checks for CAP_KILL instead of CAP_SYS_ADMIN */
1200 int bus_verify_manage_units_async_for_kill(Manager *m, sd_bus_message *call, sd_bus_error *error) {
1201 return bus_verify_polkit_async(call, CAP_KILL, "org.freedesktop.systemd1.manage-units", false, UID_INVALID, &m->polkit_registry, error);
1204 int bus_verify_manage_unit_files_async(Manager *m, sd_bus_message *call, sd_bus_error *error) {
1205 return bus_verify_polkit_async(call, CAP_SYS_ADMIN, "org.freedesktop.systemd1.manage-unit-files", false, UID_INVALID, &m->polkit_registry, error);
1208 int bus_verify_reload_daemon_async(Manager *m, sd_bus_message *call, sd_bus_error *error) {
1209 return bus_verify_polkit_async(call, CAP_SYS_ADMIN, "org.freedesktop.systemd1.reload-daemon", false, UID_INVALID, &m->polkit_registry, error);
1212 int bus_verify_set_environment_async(Manager *m, sd_bus_message *call, sd_bus_error *error) {
1213 return bus_verify_polkit_async(call, CAP_SYS_ADMIN, "org.freedesktop.systemd1.set-environment", false, UID_INVALID, &m->polkit_registry, error);