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/>.
25 #include <sys/epoll.h>
26 #include <sys/timerfd.h>
36 #include "load-fragment.h"
37 #include "load-dropin.h"
39 #include "unit-name.h"
40 #include "specifier.h"
41 #include "dbus-unit.h"
43 #include "cgroup-util.h"
45 #include "cgroup-attr.h"
47 const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = {
48 [UNIT_SERVICE] = &service_vtable,
49 [UNIT_TIMER] = &timer_vtable,
50 [UNIT_SOCKET] = &socket_vtable,
51 [UNIT_TARGET] = &target_vtable,
52 [UNIT_DEVICE] = &device_vtable,
53 [UNIT_MOUNT] = &mount_vtable,
54 [UNIT_AUTOMOUNT] = &automount_vtable,
55 [UNIT_SNAPSHOT] = &snapshot_vtable,
56 [UNIT_SWAP] = &swap_vtable,
57 [UNIT_PATH] = &path_vtable
60 Unit *unit_new(Manager *m, size_t size) {
64 assert(size >= sizeof(Unit));
70 u->names = set_new(string_hash_func, string_compare_func);
77 u->type = _UNIT_TYPE_INVALID;
78 u->deserialized_job = _JOB_TYPE_INVALID;
79 u->default_dependencies = true;
80 u->unit_file_state = _UNIT_FILE_STATE_INVALID;
85 bool unit_has_name(Unit *u, const char *name) {
89 return !!set_get(u->names, (char*) name);
92 int unit_add_name(Unit *u, const char *text) {
100 if (unit_name_is_template(text)) {
104 s = unit_name_replace_instance(text, u->instance);
111 if (!unit_name_is_valid(s, false)) {
116 assert_se((t = unit_name_to_type(s)) >= 0);
118 if (u->type != _UNIT_TYPE_INVALID && t != u->type) {
123 if ((r = unit_name_to_instance(s, &i)) < 0)
126 if (i && unit_vtable[t]->no_instances) {
131 /* Ensure that this unit is either instanced or not instanced,
133 if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) {
138 if (unit_vtable[t]->no_alias &&
139 !set_isempty(u->names) &&
140 !set_get(u->names, s)) {
145 if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) {
150 if ((r = set_put(u->names, s)) < 0) {
156 if ((r = hashmap_put(u->manager->units, s, u)) < 0) {
157 set_remove(u->names, s);
161 if (u->type == _UNIT_TYPE_INVALID) {
167 LIST_PREPEND(Unit, units_by_type, u->manager->units_by_type[t], u);
169 if (UNIT_VTABLE(u)->init)
170 UNIT_VTABLE(u)->init(u);
174 unit_add_to_dbus_queue(u);
184 int unit_choose_id(Unit *u, const char *name) {
185 char *s, *t = NULL, *i;
191 if (unit_name_is_template(name)) {
196 if (!(t = unit_name_replace_instance(name, u->instance)))
202 /* Selects one of the names of this unit as the id */
203 s = set_get(u->names, (char*) name);
209 if ((r = unit_name_to_instance(s, &i)) < 0)
217 unit_add_to_dbus_queue(u);
222 int unit_set_description(Unit *u, const char *description) {
227 if (!(s = strdup(description)))
230 free(u->description);
233 unit_add_to_dbus_queue(u);
237 bool unit_check_gc(Unit *u) {
240 if (u->load_state == UNIT_STUB)
243 if (UNIT_VTABLE(u)->no_gc)
252 if (unit_active_state(u) != UNIT_INACTIVE)
255 if (UNIT_VTABLE(u)->check_gc)
256 if (UNIT_VTABLE(u)->check_gc(u))
262 void unit_add_to_load_queue(Unit *u) {
264 assert(u->type != _UNIT_TYPE_INVALID);
266 if (u->load_state != UNIT_STUB || u->in_load_queue)
269 LIST_PREPEND(Unit, load_queue, u->manager->load_queue, u);
270 u->in_load_queue = true;
273 void unit_add_to_cleanup_queue(Unit *u) {
276 if (u->in_cleanup_queue)
279 LIST_PREPEND(Unit, cleanup_queue, u->manager->cleanup_queue, u);
280 u->in_cleanup_queue = true;
283 void unit_add_to_gc_queue(Unit *u) {
286 if (u->in_gc_queue || u->in_cleanup_queue)
289 if (unit_check_gc(u))
292 LIST_PREPEND(Unit, gc_queue, u->manager->gc_queue, u);
293 u->in_gc_queue = true;
295 u->manager->n_in_gc_queue ++;
297 if (u->manager->gc_queue_timestamp <= 0)
298 u->manager->gc_queue_timestamp = now(CLOCK_MONOTONIC);
301 void unit_add_to_dbus_queue(Unit *u) {
303 assert(u->type != _UNIT_TYPE_INVALID);
305 if (u->load_state == UNIT_STUB || u->in_dbus_queue)
308 /* Shortcut things if nobody cares */
309 if (!bus_has_subscriber(u->manager)) {
310 u->sent_dbus_new_signal = true;
314 LIST_PREPEND(Unit, dbus_queue, u->manager->dbus_unit_queue, u);
315 u->in_dbus_queue = true;
318 static void bidi_set_free(Unit *u, Set *s) {
324 /* Frees the set and makes sure we are dropped from the
325 * inverse pointers */
327 SET_FOREACH(other, s, i) {
330 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
331 set_remove(other->dependencies[d], u);
333 unit_add_to_gc_queue(other);
339 void unit_free(Unit *u) {
346 bus_unit_send_removed_signal(u);
348 if (u->load_state != UNIT_STUB)
349 if (UNIT_VTABLE(u)->done)
350 UNIT_VTABLE(u)->done(u);
352 SET_FOREACH(t, u->names, i)
353 hashmap_remove_value(u->manager->units, t, u);
358 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
359 bidi_set_free(u, u->dependencies[d]);
361 if (u->type != _UNIT_TYPE_INVALID)
362 LIST_REMOVE(Unit, units_by_type, u->manager->units_by_type[u->type], u);
364 if (u->in_load_queue)
365 LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u);
367 if (u->in_dbus_queue)
368 LIST_REMOVE(Unit, dbus_queue, u->manager->dbus_unit_queue, u);
370 if (u->in_cleanup_queue)
371 LIST_REMOVE(Unit, cleanup_queue, u->manager->cleanup_queue, u);
373 if (u->in_gc_queue) {
374 LIST_REMOVE(Unit, gc_queue, u->manager->gc_queue, u);
375 u->manager->n_in_gc_queue--;
378 cgroup_bonding_free_list(u->cgroup_bondings, u->manager->n_reloading <= 0);
379 cgroup_attribute_free_list(u->cgroup_attributes);
381 free(u->description);
382 free(u->fragment_path);
385 set_free_free(u->names);
387 condition_free_list(u->conditions);
390 unit_ref_unset(u->refs);
395 UnitActiveState unit_active_state(Unit *u) {
398 if (u->load_state == UNIT_MERGED)
399 return unit_active_state(unit_follow_merge(u));
401 /* After a reload it might happen that a unit is not correctly
402 * loaded but still has a process around. That's why we won't
403 * shortcut failed loading to UNIT_INACTIVE_FAILED. */
405 return UNIT_VTABLE(u)->active_state(u);
408 const char* unit_sub_state_to_string(Unit *u) {
411 return UNIT_VTABLE(u)->sub_state_to_string(u);
414 static void complete_move(Set **s, Set **other) {
422 set_move(*s, *other);
429 static void merge_names(Unit *u, Unit *other) {
436 complete_move(&u->names, &other->names);
438 set_free_free(other->names);
442 SET_FOREACH(t, u->names, i)
443 assert_se(hashmap_replace(u->manager->units, t, u) == 0);
446 static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) {
453 assert(d < _UNIT_DEPENDENCY_MAX);
455 /* Fix backwards pointers */
456 SET_FOREACH(back, other->dependencies[d], i) {
459 for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++)
460 if ((r = set_remove_and_put(back->dependencies[k], other, u)) < 0) {
463 set_remove(back->dependencies[k], other);
465 assert(r == -ENOENT);
469 complete_move(&u->dependencies[d], &other->dependencies[d]);
471 set_free(other->dependencies[d]);
472 other->dependencies[d] = NULL;
475 int unit_merge(Unit *u, Unit *other) {
480 assert(u->manager == other->manager);
481 assert(u->type != _UNIT_TYPE_INVALID);
483 other = unit_follow_merge(other);
488 if (u->type != other->type)
491 if (!u->instance != !other->instance)
494 if (other->load_state != UNIT_STUB &&
495 other->load_state != UNIT_ERROR)
501 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other)))
505 merge_names(u, other);
507 /* Redirect all references */
509 unit_ref_set(other->refs, u);
511 /* Merge dependencies */
512 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
513 merge_dependencies(u, other, d);
515 other->load_state = UNIT_MERGED;
516 other->merged_into = u;
518 /* If there is still some data attached to the other node, we
519 * don't need it anymore, and can free it. */
520 if (other->load_state != UNIT_STUB)
521 if (UNIT_VTABLE(other)->done)
522 UNIT_VTABLE(other)->done(other);
524 unit_add_to_dbus_queue(u);
525 unit_add_to_cleanup_queue(other);
530 int unit_merge_by_name(Unit *u, const char *name) {
538 if (unit_name_is_template(name)) {
542 if (!(s = unit_name_replace_instance(name, u->instance)))
548 if (!(other = manager_get_unit(u->manager, name)))
549 r = unit_add_name(u, name);
551 r = unit_merge(u, other);
557 Unit* unit_follow_merge(Unit *u) {
560 while (u->load_state == UNIT_MERGED)
561 assert_se(u = u->merged_into);
566 int unit_add_exec_dependencies(Unit *u, ExecContext *c) {
572 if (c->std_output != EXEC_OUTPUT_KMSG &&
573 c->std_output != EXEC_OUTPUT_SYSLOG &&
574 c->std_output != EXEC_OUTPUT_JOURNAL &&
575 c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE &&
576 c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE &&
577 c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE &&
578 c->std_error != EXEC_OUTPUT_KMSG &&
579 c->std_error != EXEC_OUTPUT_SYSLOG &&
580 c->std_error != EXEC_OUTPUT_JOURNAL &&
581 c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE &&
582 c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE &&
583 c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE)
586 /* If syslog or kernel logging is requested, make sure our own
587 * logging daemon is run first. */
589 if (u->manager->running_as == MANAGER_SYSTEM)
590 if ((r = unit_add_two_dependencies_by_name(u, UNIT_REQUIRES, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true)) < 0)
596 const char *unit_description(Unit *u) {
600 return u->description;
605 void unit_dump(Unit *u, FILE *f, const char *prefix) {
612 timestamp1[FORMAT_TIMESTAMP_MAX],
613 timestamp2[FORMAT_TIMESTAMP_MAX],
614 timestamp3[FORMAT_TIMESTAMP_MAX],
615 timestamp4[FORMAT_TIMESTAMP_MAX],
616 timespan[FORMAT_TIMESPAN_MAX];
620 assert(u->type >= 0);
624 p2 = strappend(prefix, "\t");
625 prefix2 = p2 ? p2 : prefix;
629 "%s\tDescription: %s\n"
631 "%s\tUnit Load State: %s\n"
632 "%s\tUnit Active State: %s\n"
633 "%s\tInactive Exit Timestamp: %s\n"
634 "%s\tActive Enter Timestamp: %s\n"
635 "%s\tActive Exit Timestamp: %s\n"
636 "%s\tInactive Enter Timestamp: %s\n"
637 "%s\tGC Check Good: %s\n"
638 "%s\tNeed Daemon Reload: %s\n",
640 prefix, unit_description(u),
641 prefix, strna(u->instance),
642 prefix, unit_load_state_to_string(u->load_state),
643 prefix, unit_active_state_to_string(unit_active_state(u)),
644 prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)),
645 prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)),
646 prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)),
647 prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)),
648 prefix, yes_no(unit_check_gc(u)),
649 prefix, yes_no(unit_need_daemon_reload(u)));
651 SET_FOREACH(t, u->names, i)
652 fprintf(f, "%s\tName: %s\n", prefix, t);
654 if ((following = unit_following(u)))
655 fprintf(f, "%s\tFollowing: %s\n", prefix, following->id);
657 if (u->fragment_path)
658 fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path);
660 if (u->job_timeout > 0)
661 fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout));
663 condition_dump_list(u->conditions, f, prefix);
665 if (dual_timestamp_is_set(&u->condition_timestamp))
667 "%s\tCondition Timestamp: %s\n"
668 "%s\tCondition Result: %s\n",
669 prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)),
670 prefix, yes_no(u->condition_result));
672 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) {
675 SET_FOREACH(other, u->dependencies[d], i)
676 fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id);
679 if (u->load_state == UNIT_LOADED) {
684 "%s\tStopWhenUnneeded: %s\n"
685 "%s\tRefuseManualStart: %s\n"
686 "%s\tRefuseManualStop: %s\n"
687 "%s\tDefaultDependencies: %s\n"
688 "%s\tOnFailureIsolate: %s\n"
689 "%s\tIgnoreOnIsolate: %s\n"
690 "%s\tIgnoreOnSnapshot: %s\n",
691 prefix, yes_no(u->stop_when_unneeded),
692 prefix, yes_no(u->refuse_manual_start),
693 prefix, yes_no(u->refuse_manual_stop),
694 prefix, yes_no(u->default_dependencies),
695 prefix, yes_no(u->on_failure_isolate),
696 prefix, yes_no(u->ignore_on_isolate),
697 prefix, yes_no(u->ignore_on_snapshot));
699 LIST_FOREACH(by_unit, b, u->cgroup_bondings)
700 fprintf(f, "%s\tControlGroup: %s:%s\n",
701 prefix, b->controller, b->path);
703 LIST_FOREACH(by_unit, a, u->cgroup_attributes) {
707 a->map_callback(a->controller, a->name, a->value, &v);
709 fprintf(f, "%s\tControlGroupAttribute: %s %s \"%s\"\n",
710 prefix, a->controller, a->name, v ? v : a->value);
715 if (UNIT_VTABLE(u)->dump)
716 UNIT_VTABLE(u)->dump(u, f, prefix2);
718 } else if (u->load_state == UNIT_MERGED)
720 "%s\tMerged into: %s\n",
721 prefix, u->merged_into->id);
722 else if (u->load_state == UNIT_ERROR)
723 fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error));
727 job_dump(u->job, f, prefix2);
732 /* Common implementation for multiple backends */
733 int unit_load_fragment_and_dropin(Unit *u) {
738 /* Load a .service file */
739 if ((r = unit_load_fragment(u)) < 0)
742 if (u->load_state == UNIT_STUB)
745 /* Load drop-in directory data */
746 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
752 /* Common implementation for multiple backends */
753 int unit_load_fragment_and_dropin_optional(Unit *u) {
758 /* Same as unit_load_fragment_and_dropin(), but whether
759 * something can be loaded or not doesn't matter. */
761 /* Load a .service file */
762 if ((r = unit_load_fragment(u)) < 0)
765 if (u->load_state == UNIT_STUB)
766 u->load_state = UNIT_LOADED;
768 /* Load drop-in directory data */
769 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
775 int unit_add_default_target_dependency(Unit *u, Unit *target) {
779 if (target->type != UNIT_TARGET)
782 /* Only add the dependency if both units are loaded, so that
783 * that loop check below is reliable */
784 if (u->load_state != UNIT_LOADED ||
785 target->load_state != UNIT_LOADED)
788 /* If either side wants no automatic dependencies, then let's
790 if (!u->default_dependencies ||
791 !target->default_dependencies)
794 /* Don't create loops */
795 if (set_get(target->dependencies[UNIT_BEFORE], u))
798 return unit_add_dependency(target, UNIT_AFTER, u, true);
801 static int unit_add_default_dependencies(Unit *u) {
802 static const UnitDependency deps[] = {
804 UNIT_REQUIRED_BY_OVERRIDABLE,
816 for (k = 0; k < ELEMENTSOF(deps); k++)
817 SET_FOREACH(target, u->dependencies[deps[k]], i)
818 if ((r = unit_add_default_target_dependency(u, target)) < 0)
824 int unit_load(Unit *u) {
829 if (u->in_load_queue) {
830 LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u);
831 u->in_load_queue = false;
834 if (u->type == _UNIT_TYPE_INVALID)
837 if (u->load_state != UNIT_STUB)
840 if (UNIT_VTABLE(u)->load)
841 if ((r = UNIT_VTABLE(u)->load(u)) < 0)
844 if (u->load_state == UNIT_STUB) {
849 if (u->load_state == UNIT_LOADED &&
850 u->default_dependencies)
851 if ((r = unit_add_default_dependencies(u)) < 0)
854 if (u->on_failure_isolate &&
855 set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) {
857 log_error("More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.",
864 assert((u->load_state != UNIT_MERGED) == !u->merged_into);
866 unit_add_to_dbus_queue(unit_follow_merge(u));
867 unit_add_to_gc_queue(u);
872 u->load_state = UNIT_ERROR;
874 unit_add_to_dbus_queue(u);
875 unit_add_to_gc_queue(u);
877 log_debug("Failed to load configuration for %s: %s", u->id, strerror(-r));
882 bool unit_condition_test(Unit *u) {
885 dual_timestamp_get(&u->condition_timestamp);
886 u->condition_result = condition_test_list(u->conditions);
888 return u->condition_result;
892 * -EBADR: This unit type does not support starting.
893 * -EALREADY: Unit is already started.
894 * -EAGAIN: An operation is already in progress. Retry later.
895 * -ECANCELED: Too many requests for now.
897 int unit_start(Unit *u) {
898 UnitActiveState state;
903 if (u->load_state != UNIT_LOADED)
906 /* If this is already started, then this will succeed. Note
907 * that this will even succeed if this unit is not startable
908 * by the user. This is relied on to detect when we need to
909 * wait for units and when waiting is finished. */
910 state = unit_active_state(u);
911 if (UNIT_IS_ACTIVE_OR_RELOADING(state))
914 /* If the conditions failed, don't do anything at all. If we
915 * already are activating this call might still be useful to
916 * speed up activation in case there is some hold-off time,
917 * but we don't want to recheck the condition in that case. */
918 if (state != UNIT_ACTIVATING &&
919 !unit_condition_test(u)) {
920 log_debug("Starting of %s requested but condition failed. Ignoring.", u->id);
924 /* Forward to the main object, if we aren't it. */
925 if ((following = unit_following(u))) {
926 log_debug("Redirecting start request from %s to %s.", u->id, following->id);
927 return unit_start(following);
930 /* If it is stopped, but we cannot start it, then fail */
931 if (!UNIT_VTABLE(u)->start)
934 /* We don't suppress calls to ->start() here when we are
935 * already starting, to allow this request to be used as a
936 * "hurry up" call, for example when the unit is in some "auto
937 * restart" state where it waits for a holdoff timer to elapse
938 * before it will start again. */
940 unit_add_to_dbus_queue(u);
942 unit_status_printf(u, NULL, "Starting %s...", unit_description(u));
943 return UNIT_VTABLE(u)->start(u);
946 bool unit_can_start(Unit *u) {
949 return !!UNIT_VTABLE(u)->start;
952 bool unit_can_isolate(Unit *u) {
955 return unit_can_start(u) &&
960 * -EBADR: This unit type does not support stopping.
961 * -EALREADY: Unit is already stopped.
962 * -EAGAIN: An operation is already in progress. Retry later.
964 int unit_stop(Unit *u) {
965 UnitActiveState state;
970 state = unit_active_state(u);
971 if (UNIT_IS_INACTIVE_OR_FAILED(state))
974 if ((following = unit_following(u))) {
975 log_debug("Redirecting stop request from %s to %s.", u->id, following->id);
976 return unit_stop(following);
979 if (!UNIT_VTABLE(u)->stop)
982 unit_add_to_dbus_queue(u);
984 unit_status_printf(u, NULL, "Stopping %s...", unit_description(u));
985 return UNIT_VTABLE(u)->stop(u);
989 * -EBADR: This unit type does not support reloading.
990 * -ENOEXEC: Unit is not started.
991 * -EAGAIN: An operation is already in progress. Retry later.
993 int unit_reload(Unit *u) {
994 UnitActiveState state;
999 if (u->load_state != UNIT_LOADED)
1002 if (!unit_can_reload(u))
1005 state = unit_active_state(u);
1006 if (state == UNIT_RELOADING)
1009 if (state != UNIT_ACTIVE)
1012 if ((following = unit_following(u))) {
1013 log_debug("Redirecting reload request from %s to %s.", u->id, following->id);
1014 return unit_reload(following);
1017 unit_add_to_dbus_queue(u);
1018 return UNIT_VTABLE(u)->reload(u);
1021 bool unit_can_reload(Unit *u) {
1024 if (!UNIT_VTABLE(u)->reload)
1027 if (!UNIT_VTABLE(u)->can_reload)
1030 return UNIT_VTABLE(u)->can_reload(u);
1033 static void unit_check_unneeded(Unit *u) {
1039 /* If this service shall be shut down when unneeded then do
1042 if (!u->stop_when_unneeded)
1045 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
1048 SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i)
1049 if (unit_pending_active(other))
1052 SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
1053 if (unit_pending_active(other))
1056 SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i)
1057 if (unit_pending_active(other))
1060 SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i)
1061 if (unit_pending_active(other))
1064 log_info("Service %s is not needed anymore. Stopping.", u->id);
1066 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
1067 manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL);
1070 static void retroactively_start_dependencies(Unit *u) {
1075 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)));
1077 SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i)
1078 if (!set_get(u->dependencies[UNIT_AFTER], other) &&
1079 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1080 manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1082 SET_FOREACH(other, u->dependencies[UNIT_BIND_TO], i)
1083 if (!set_get(u->dependencies[UNIT_AFTER], other) &&
1084 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1085 manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1087 SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1088 if (!set_get(u->dependencies[UNIT_AFTER], other) &&
1089 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1090 manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
1092 SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i)
1093 if (!set_get(u->dependencies[UNIT_AFTER], other) &&
1094 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1095 manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1097 SET_FOREACH(other, u->dependencies[UNIT_WANTS], i)
1098 if (!set_get(u->dependencies[UNIT_AFTER], other) &&
1099 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1100 manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
1102 SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i)
1103 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1104 manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
1106 SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i)
1107 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1108 manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
1111 static void retroactively_stop_dependencies(Unit *u) {
1116 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)));
1118 /* Pull down units which are bound to us recursively if enabled */
1119 SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i)
1120 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1121 manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
1124 static void check_unneeded_dependencies(Unit *u) {
1129 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)));
1131 /* Garbage collect services that might not be needed anymore, if enabled */
1132 SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i)
1133 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1134 unit_check_unneeded(other);
1135 SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1136 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1137 unit_check_unneeded(other);
1138 SET_FOREACH(other, u->dependencies[UNIT_WANTS], i)
1139 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1140 unit_check_unneeded(other);
1141 SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i)
1142 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1143 unit_check_unneeded(other);
1144 SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
1145 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1146 unit_check_unneeded(other);
1147 SET_FOREACH(other, u->dependencies[UNIT_BIND_TO], i)
1148 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1149 unit_check_unneeded(other);
1152 void unit_trigger_on_failure(Unit *u) {
1158 if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0)
1161 log_info("Triggering OnFailure= dependencies of %s.", u->id);
1163 SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) {
1166 if ((r = manager_add_job(u->manager, JOB_START, other, u->on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL)) < 0)
1167 log_error("Failed to enqueue OnFailure= job: %s", strerror(-r));
1171 void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) {
1175 assert(os < _UNIT_ACTIVE_STATE_MAX);
1176 assert(ns < _UNIT_ACTIVE_STATE_MAX);
1178 /* Note that this is called for all low-level state changes,
1179 * even if they might map to the same high-level
1180 * UnitActiveState! That means that ns == os is OK an expected
1181 * behaviour here. For example: if a mount point is remounted
1182 * this function will be called too! */
1184 if (u->manager->n_reloading <= 0) {
1187 dual_timestamp_get(&ts);
1189 if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns))
1190 u->inactive_exit_timestamp = ts;
1191 else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns))
1192 u->inactive_enter_timestamp = ts;
1194 if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns))
1195 u->active_enter_timestamp = ts;
1196 else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns))
1197 u->active_exit_timestamp = ts;
1199 timer_unit_notify(u, ns);
1200 path_unit_notify(u, ns);
1203 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1204 cgroup_bonding_trim_list(u->cgroup_bondings, true);
1209 if (u->job->state == JOB_WAITING)
1211 /* So we reached a different state for this
1212 * job. Let's see if we can run it now if it
1213 * failed previously due to EAGAIN. */
1214 job_add_to_run_queue(u->job);
1216 /* Let's check whether this state change constitutes a
1217 * finished job, or maybe contradicts a running job and
1218 * hence needs to invalidate jobs. */
1220 switch (u->job->type) {
1223 case JOB_VERIFY_ACTIVE:
1225 if (UNIT_IS_ACTIVE_OR_RELOADING(ns))
1226 job_finish_and_invalidate(u->job, JOB_DONE);
1227 else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) {
1230 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1231 job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE);
1237 case JOB_RELOAD_OR_START:
1239 if (u->job->state == JOB_RUNNING) {
1240 if (ns == UNIT_ACTIVE)
1241 job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED);
1242 else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) {
1245 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1246 job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE);
1254 case JOB_TRY_RESTART:
1256 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1257 job_finish_and_invalidate(u->job, JOB_DONE);
1258 else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) {
1260 job_finish_and_invalidate(u->job, JOB_FAILED);
1266 assert_not_reached("Job type unknown");
1272 if (u->manager->n_reloading <= 0) {
1274 /* If this state change happened without being
1275 * requested by a job, then let's retroactively start
1276 * or stop dependencies. We skip that step when
1277 * deserializing, since we don't want to create any
1278 * additional jobs just because something is already
1282 if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns))
1283 retroactively_start_dependencies(u);
1284 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
1285 retroactively_stop_dependencies(u);
1288 /* stop unneeded units regardless if going down was expected or not */
1289 if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
1290 check_unneeded_dependencies(u);
1292 if (ns != os && ns == UNIT_FAILED) {
1293 log_notice("Unit %s entered failed state.", u->id);
1294 unit_trigger_on_failure(u);
1298 /* Some names are special */
1299 if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
1301 if (unit_has_name(u, SPECIAL_DBUS_SERVICE))
1302 /* The bus just might have become available,
1303 * hence try to connect to it, if we aren't
1305 bus_init(u->manager, true);
1307 if (u->type == UNIT_SERVICE &&
1308 !UNIT_IS_ACTIVE_OR_RELOADING(os) &&
1309 u->manager->n_reloading <= 0) {
1310 /* Write audit record if we have just finished starting up */
1311 manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true);
1315 if (!UNIT_IS_ACTIVE_OR_RELOADING(os))
1316 manager_send_unit_plymouth(u->manager, u);
1320 /* We don't care about D-Bus here, since we'll get an
1321 * asynchronous notification for it anyway. */
1323 if (u->type == UNIT_SERVICE &&
1324 UNIT_IS_INACTIVE_OR_FAILED(ns) &&
1325 !UNIT_IS_INACTIVE_OR_FAILED(os) &&
1326 u->manager->n_reloading <= 0) {
1328 /* Hmm, if there was no start record written
1329 * write it now, so that we always have a nice
1332 manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE);
1334 if (ns == UNIT_INACTIVE)
1335 manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true);
1337 /* Write audit record if we have just finished shutting down */
1338 manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE);
1340 u->in_audit = false;
1344 manager_recheck_journal(u->manager);
1346 /* Maybe we finished startup and are now ready for being
1347 * stopped because unneeded? */
1348 unit_check_unneeded(u);
1350 unit_add_to_dbus_queue(u);
1351 unit_add_to_gc_queue(u);
1354 int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) {
1355 struct epoll_event ev;
1360 assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u));
1366 if (epoll_ctl(u->manager->epoll_fd,
1367 w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD,
1379 void unit_unwatch_fd(Unit *u, Watch *w) {
1383 if (w->type == WATCH_INVALID)
1386 assert(w->type == WATCH_FD);
1387 assert(w->data.unit == u);
1388 assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
1391 w->type = WATCH_INVALID;
1392 w->data.unit = NULL;
1395 int unit_watch_pid(Unit *u, pid_t pid) {
1399 /* Watch a specific PID. We only support one unit watching
1400 * each PID for now. */
1402 return hashmap_put(u->manager->watch_pids, LONG_TO_PTR(pid), u);
1405 void unit_unwatch_pid(Unit *u, pid_t pid) {
1409 hashmap_remove_value(u->manager->watch_pids, LONG_TO_PTR(pid), u);
1412 int unit_watch_timer(Unit *u, usec_t delay, Watch *w) {
1413 struct itimerspec its;
1419 assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u));
1421 /* This will try to reuse the old timer if there is one */
1423 if (w->type == WATCH_UNIT_TIMER) {
1424 assert(w->data.unit == u);
1429 } else if (w->type == WATCH_INVALID) {
1432 if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
1435 assert_not_reached("Invalid watch type");
1440 /* Set absolute time in the past, but not 0, since we
1441 * don't want to disarm the timer */
1442 its.it_value.tv_sec = 0;
1443 its.it_value.tv_nsec = 1;
1445 flags = TFD_TIMER_ABSTIME;
1447 timespec_store(&its.it_value, delay);
1451 /* This will also flush the elapse counter */
1452 if (timerfd_settime(fd, flags, &its, NULL) < 0)
1455 if (w->type == WATCH_INVALID) {
1456 struct epoll_event ev;
1460 ev.events = EPOLLIN;
1462 if (epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0)
1466 w->type = WATCH_UNIT_TIMER;
1474 close_nointr_nofail(fd);
1479 void unit_unwatch_timer(Unit *u, Watch *w) {
1483 if (w->type == WATCH_INVALID)
1486 assert(w->type == WATCH_UNIT_TIMER);
1487 assert(w->data.unit == u);
1490 assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
1491 close_nointr_nofail(w->fd);
1494 w->type = WATCH_INVALID;
1495 w->data.unit = NULL;
1498 bool unit_job_is_applicable(Unit *u, JobType j) {
1500 assert(j >= 0 && j < _JOB_TYPE_MAX);
1504 case JOB_VERIFY_ACTIVE:
1510 case JOB_TRY_RESTART:
1511 return unit_can_start(u);
1514 return unit_can_reload(u);
1516 case JOB_RELOAD_OR_START:
1517 return unit_can_reload(u) && unit_can_start(u);
1520 assert_not_reached("Invalid job type");
1524 int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) {
1526 static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = {
1527 [UNIT_REQUIRES] = UNIT_REQUIRED_BY,
1528 [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
1529 [UNIT_WANTS] = UNIT_WANTED_BY,
1530 [UNIT_REQUISITE] = UNIT_REQUIRED_BY,
1531 [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
1532 [UNIT_BIND_TO] = UNIT_BOUND_BY,
1533 [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID,
1534 [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID,
1535 [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID,
1536 [UNIT_BOUND_BY] = UNIT_BIND_TO,
1537 [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY,
1538 [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS,
1539 [UNIT_BEFORE] = UNIT_AFTER,
1540 [UNIT_AFTER] = UNIT_BEFORE,
1541 [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID,
1542 [UNIT_REFERENCES] = UNIT_REFERENCED_BY,
1543 [UNIT_REFERENCED_BY] = UNIT_REFERENCES,
1544 [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY,
1545 [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS,
1546 [UNIT_PROPAGATE_RELOAD_TO] = UNIT_PROPAGATE_RELOAD_FROM,
1547 [UNIT_PROPAGATE_RELOAD_FROM] = UNIT_PROPAGATE_RELOAD_TO
1549 int r, q = 0, v = 0, w = 0;
1552 assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX);
1555 u = unit_follow_merge(u);
1556 other = unit_follow_merge(other);
1558 /* We won't allow dependencies on ourselves. We will not
1559 * consider them an error however. */
1563 if ((r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func)) < 0)
1566 if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
1567 if ((r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0)
1571 if ((r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 ||
1572 (r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0)
1575 if ((q = set_put(u->dependencies[d], other)) < 0)
1578 if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
1579 if ((v = set_put(other->dependencies[inverse_table[d]], u)) < 0) {
1584 if (add_reference) {
1585 if ((w = set_put(u->dependencies[UNIT_REFERENCES], other)) < 0) {
1590 if ((r = set_put(other->dependencies[UNIT_REFERENCED_BY], u)) < 0)
1594 unit_add_to_dbus_queue(u);
1599 set_remove(u->dependencies[d], other);
1602 set_remove(other->dependencies[inverse_table[d]], u);
1605 set_remove(u->dependencies[UNIT_REFERENCES], other);
1610 int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) {
1615 if ((r = unit_add_dependency(u, d, other, add_reference)) < 0)
1618 if ((r = unit_add_dependency(u, e, other, add_reference)) < 0)
1624 static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) {
1628 assert(name || path);
1631 name = file_name_from_path(path);
1633 if (!unit_name_is_template(name)) {
1639 s = unit_name_replace_instance(name, u->instance);
1643 if (!(i = unit_name_to_prefix(u->id)))
1646 s = unit_name_replace_instance(name, i);
1657 int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
1663 assert(name || path);
1665 if (!(name = resolve_template(u, name, path, &s)))
1668 if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
1671 r = unit_add_dependency(u, d, other, add_reference);
1678 int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
1684 assert(name || path);
1686 if (!(name = resolve_template(u, name, path, &s)))
1689 if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
1692 r = unit_add_two_dependencies(u, d, e, other, add_reference);
1699 int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
1705 assert(name || path);
1707 if (!(name = resolve_template(u, name, path, &s)))
1710 if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
1713 r = unit_add_dependency(other, d, u, add_reference);
1720 int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
1726 assert(name || path);
1728 if (!(name = resolve_template(u, name, path, &s)))
1731 if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0)
1734 if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0)
1742 int set_unit_path(const char *p) {
1746 /* This is mostly for debug purposes */
1748 if (path_is_absolute(p)) {
1749 if (!(c = strdup(p)))
1752 if (!(cwd = get_current_dir_name()))
1755 r = asprintf(&c, "%s/%s", cwd, p);
1762 if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) {
1771 char *unit_dbus_path(Unit *u) {
1779 if (!(e = bus_path_escape(u->id)))
1782 p = strappend("/org/freedesktop/systemd1/unit/", e);
1788 int unit_add_cgroup(Unit *u, CGroupBonding *b) {
1796 if (!b->controller) {
1797 if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER)))
1803 /* Ensure this hasn't been added yet */
1806 if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) {
1809 l = hashmap_get(u->manager->cgroup_bondings, b->path);
1810 LIST_PREPEND(CGroupBonding, by_path, l, b);
1812 if ((r = hashmap_replace(u->manager->cgroup_bondings, b->path, l)) < 0) {
1813 LIST_REMOVE(CGroupBonding, by_path, l, b);
1818 LIST_PREPEND(CGroupBonding, by_unit, u->cgroup_bondings, b);
1824 static char *default_cgroup_path(Unit *u) {
1832 t = unit_name_template(u->id);
1836 p = join(u->manager->cgroup_hierarchy, "/", t, "/", u->instance, NULL);
1839 p = join(u->manager->cgroup_hierarchy, "/", u->id, NULL);
1844 int unit_add_cgroup_from_text(Unit *u, const char *name) {
1845 char *controller = NULL, *path = NULL;
1846 CGroupBonding *b = NULL;
1853 if ((r = cg_split_spec(name, &controller, &path)) < 0)
1857 path = default_cgroup_path(u);
1862 controller = strdup(SYSTEMD_CGROUP_CONTROLLER);
1866 if (!path || !controller) {
1873 if (cgroup_bonding_find_list(u->cgroup_bondings, controller)) {
1878 if (!(b = new0(CGroupBonding, 1))) {
1883 b->controller = controller;
1886 b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER);
1888 if ((r = unit_add_cgroup(u, b)) < 0)
1901 static int unit_add_one_default_cgroup(Unit *u, const char *controller) {
1902 CGroupBonding *b = NULL;
1908 controller = SYSTEMD_CGROUP_CONTROLLER;
1910 if (cgroup_bonding_find_list(u->cgroup_bondings, controller))
1913 if (!(b = new0(CGroupBonding, 1)))
1916 if (!(b->controller = strdup(controller)))
1919 if (!(b->path = default_cgroup_path(u)))
1923 b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER);
1925 if ((r = unit_add_cgroup(u, b)) < 0)
1932 free(b->controller);
1938 int unit_add_default_cgroups(Unit *u) {
1945 /* Adds in the default cgroups, if they weren't specified
1948 if (!u->manager->cgroup_hierarchy)
1951 if ((r = unit_add_one_default_cgroup(u, NULL)) < 0)
1954 STRV_FOREACH(c, u->manager->default_controllers)
1955 unit_add_one_default_cgroup(u, *c);
1957 LIST_FOREACH(by_unit, a, u->cgroup_attributes)
1958 unit_add_one_default_cgroup(u, a->controller);
1963 CGroupBonding* unit_get_default_cgroup(Unit *u) {
1966 return cgroup_bonding_find_list(u->cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER);
1969 int unit_add_cgroup_attribute(Unit *u, const char *controller, const char *name, const char *value, CGroupAttributeMapCallback map_callback) {
1981 dot = strchr(name, '.');
1985 c = strndup(name, dot - name);
1992 if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)) {
1997 a = new0(CGroupAttribute, 1);
2007 a->controller = strdup(controller);
2009 a->name = strdup(name);
2010 a->value = strdup(value);
2012 if (!a->controller || !a->name || !a->value) {
2013 free(a->controller);
2021 a->map_callback = map_callback;
2023 LIST_PREPEND(CGroupAttribute, by_unit, u->cgroup_attributes, a);
2032 int unit_load_related_unit(Unit *u, const char *type, Unit **_found) {
2040 if (!(t = unit_name_change_suffix(u->id, type)))
2043 assert(!unit_has_name(u, t));
2045 r = manager_load_unit(u->manager, t, NULL, NULL, _found);
2048 assert(r < 0 || *_found != u);
2053 int unit_get_related_unit(Unit *u, const char *type, Unit **_found) {
2061 if (!(t = unit_name_change_suffix(u->id, type)))
2064 assert(!unit_has_name(u, t));
2066 found = manager_get_unit(u->manager, t);
2076 static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) {
2080 return unit_name_to_prefix_and_instance(u->id);
2083 static char *specifier_prefix(char specifier, void *data, void *userdata) {
2087 return unit_name_to_prefix(u->id);
2090 static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) {
2096 if (!(p = unit_name_to_prefix(u->id)))
2099 r = unit_name_unescape(p);
2105 static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) {
2110 return unit_name_unescape(u->instance);
2115 static char *specifier_filename(char specifier, void *data, void *userdata) {
2120 return unit_name_path_unescape(u->instance);
2122 return unit_name_to_path(u->instance);
2125 static char *specifier_cgroup(char specifier, void *data, void *userdata) {
2129 return default_cgroup_path(u);
2132 static char *specifier_cgroup_root(char specifier, void *data, void *userdata) {
2137 if (specifier == 'r')
2138 return strdup(u->manager->cgroup_hierarchy);
2140 if (parent_of_path(u->manager->cgroup_hierarchy, &p) < 0)
2143 if (streq(p, "/")) {
2151 static char *specifier_runtime(char specifier, void *data, void *userdata) {
2155 if (u->manager->running_as == MANAGER_USER) {
2158 e = getenv("XDG_RUNTIME_DIR");
2163 return strdup("/run");
2166 char *unit_name_printf(Unit *u, const char* format) {
2169 * This will use the passed string as format string and
2170 * replace the following specifiers:
2172 * %n: the full id of the unit (foo@bar.waldo)
2173 * %N: the id of the unit without the suffix (foo@bar)
2174 * %p: the prefix (foo)
2175 * %i: the instance (bar)
2178 const Specifier table[] = {
2179 { 'n', specifier_string, u->id },
2180 { 'N', specifier_prefix_and_instance, NULL },
2181 { 'p', specifier_prefix, NULL },
2182 { 'i', specifier_string, u->instance },
2189 return specifier_printf(format, table, u);
2192 char *unit_full_printf(Unit *u, const char *format) {
2194 /* This is similar to unit_name_printf() but also supports
2195 * unescaping. Also, adds a couple of additional codes:
2197 * %c cgroup path of unit
2198 * %r root cgroup path of this systemd instance (e.g. "/user/lennart/shared/systemd-4711")
2199 * %R parent of root cgroup path (e.g. "/usr/lennart/shared")
2200 * %t the runtime directory to place sockets in (e.g. "/run" or $XDG_RUNTIME_DIR)
2203 const Specifier table[] = {
2204 { 'n', specifier_string, u->id },
2205 { 'N', specifier_prefix_and_instance, NULL },
2206 { 'p', specifier_prefix, NULL },
2207 { 'P', specifier_prefix_unescaped, NULL },
2208 { 'i', specifier_string, u->instance },
2209 { 'I', specifier_instance_unescaped, NULL },
2210 { 'f', specifier_filename, NULL },
2211 { 'c', specifier_cgroup, NULL },
2212 { 'r', specifier_cgroup_root, NULL },
2213 { 'R', specifier_cgroup_root, NULL },
2214 { 't', specifier_runtime, NULL },
2221 return specifier_printf(format, table, u);
2224 char **unit_full_printf_strv(Unit *u, char **l) {
2228 /* Applies unit_full_printf to every entry in l */
2233 if (!(r = new(char*, n+1)))
2236 for (i = l, j = r; *i; i++, j++)
2237 if (!(*j = unit_full_printf(u, *i)))
2244 for (j--; j >= r; j--)
2252 int unit_watch_bus_name(Unit *u, const char *name) {
2256 /* Watch a specific name on the bus. We only support one unit
2257 * watching each name for now. */
2259 return hashmap_put(u->manager->watch_bus, name, u);
2262 void unit_unwatch_bus_name(Unit *u, const char *name) {
2266 hashmap_remove_value(u->manager->watch_bus, name, u);
2269 bool unit_can_serialize(Unit *u) {
2272 return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item;
2275 int unit_serialize(Unit *u, FILE *f, FDSet *fds) {
2282 if (!unit_can_serialize(u))
2285 if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0)
2289 unit_serialize_item(u, f, "job", job_type_to_string(u->job->type));
2291 dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp);
2292 dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp);
2293 dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp);
2294 dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp);
2295 dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp);
2297 if (dual_timestamp_is_set(&u->condition_timestamp))
2298 unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result));
2305 void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) {
2316 va_start(ap, format);
2317 vfprintf(f, format, ap);
2323 void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) {
2329 fprintf(f, "%s=%s\n", key, value);
2332 int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
2339 if (!unit_can_serialize(u))
2343 char line[LINE_MAX], *l, *v;
2346 if (!fgets(line, sizeof(line), f)) {
2359 k = strcspn(l, "=");
2367 if (streq(l, "job")) {
2370 if ((type = job_type_from_string(v)) < 0)
2371 log_debug("Failed to parse job type value %s", v);
2373 u->deserialized_job = type;
2376 } else if (streq(l, "inactive-exit-timestamp")) {
2377 dual_timestamp_deserialize(v, &u->inactive_exit_timestamp);
2379 } else if (streq(l, "active-enter-timestamp")) {
2380 dual_timestamp_deserialize(v, &u->active_enter_timestamp);
2382 } else if (streq(l, "active-exit-timestamp")) {
2383 dual_timestamp_deserialize(v, &u->active_exit_timestamp);
2385 } else if (streq(l, "inactive-enter-timestamp")) {
2386 dual_timestamp_deserialize(v, &u->inactive_enter_timestamp);
2388 } else if (streq(l, "condition-timestamp")) {
2389 dual_timestamp_deserialize(v, &u->condition_timestamp);
2391 } else if (streq(l, "condition-result")) {
2394 if ((b = parse_boolean(v)) < 0)
2395 log_debug("Failed to parse condition result value %s", v);
2397 u->condition_result = b;
2402 if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0)
2407 int unit_add_node_link(Unit *u, const char *what, bool wants) {
2417 /* Adds in links to the device node that this unit is based on */
2419 if (!is_device_path(what))
2422 if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
2425 r = manager_load_unit(u->manager, e, NULL, NULL, &device);
2431 if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BIND_TO, device, true)) < 0)
2435 if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0)
2441 int unit_coldplug(Unit *u) {
2446 if (UNIT_VTABLE(u)->coldplug)
2447 if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0)
2450 if (u->deserialized_job >= 0) {
2451 if ((r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL)) < 0)
2454 u->deserialized_job = _JOB_TYPE_INVALID;
2460 void unit_status_printf(Unit *u, const char *status, const char *format, ...) {
2466 if (!UNIT_VTABLE(u)->show_status)
2469 if (!manager_get_show_status(u->manager))
2472 if (!manager_is_booting_or_shutting_down(u->manager))
2475 va_start(ap, format);
2476 status_vprintf(status, true, format, ap);
2480 bool unit_need_daemon_reload(Unit *u) {
2483 if (u->fragment_path) {
2487 if (stat(u->fragment_path, &st) < 0)
2488 /* What, cannot access this anymore? */
2491 if (u->fragment_mtime > 0 &&
2492 timespec_load(&st.st_mtim) != u->fragment_mtime)
2496 if (UNIT_VTABLE(u)->need_daemon_reload)
2497 return UNIT_VTABLE(u)->need_daemon_reload(u);
2502 void unit_reset_failed(Unit *u) {
2505 if (UNIT_VTABLE(u)->reset_failed)
2506 UNIT_VTABLE(u)->reset_failed(u);
2509 Unit *unit_following(Unit *u) {
2512 if (UNIT_VTABLE(u)->following)
2513 return UNIT_VTABLE(u)->following(u);
2518 bool unit_pending_inactive(Unit *u) {
2521 /* Returns true if the unit is inactive or going down */
2523 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)))
2526 if (u->job && u->job->type == JOB_STOP)
2532 bool unit_pending_active(Unit *u) {
2535 /* Returns true if the unit is active or going up */
2537 if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
2541 (u->job->type == JOB_START ||
2542 u->job->type == JOB_RELOAD_OR_START ||
2543 u->job->type == JOB_RESTART))
2549 UnitType unit_name_to_type(const char *n) {
2554 for (t = 0; t < _UNIT_TYPE_MAX; t++)
2555 if (endswith(n, unit_vtable[t]->suffix))
2558 return _UNIT_TYPE_INVALID;
2561 bool unit_name_is_valid(const char *n, bool template_ok) {
2564 t = unit_name_to_type(n);
2565 if (t < 0 || t >= _UNIT_TYPE_MAX)
2568 return unit_name_is_valid_no_type(n, template_ok);
2571 int unit_kill(Unit *u, KillWho w, KillMode m, int signo, DBusError *error) {
2573 assert(w >= 0 && w < _KILL_WHO_MAX);
2574 assert(m >= 0 && m < _KILL_MODE_MAX);
2576 assert(signo < _NSIG);
2581 if (!UNIT_VTABLE(u)->kill)
2584 return UNIT_VTABLE(u)->kill(u, w, m, signo, error);
2587 int unit_following_set(Unit *u, Set **s) {
2591 if (UNIT_VTABLE(u)->following_set)
2592 return UNIT_VTABLE(u)->following_set(u, s);
2598 UnitFileState unit_get_unit_file_state(Unit *u) {
2601 if (u->unit_file_state < 0 && u->fragment_path)
2602 u->unit_file_state = unit_file_get_state(
2603 u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER,
2604 NULL, file_name_from_path(u->fragment_path));
2606 return u->unit_file_state;
2609 Unit* unit_ref_set(UnitRef *ref, Unit *u) {
2614 unit_ref_unset(ref);
2617 LIST_PREPEND(UnitRef, refs, u->refs, ref);
2621 void unit_ref_unset(UnitRef *ref) {
2627 LIST_REMOVE(UnitRef, refs, ref->unit->refs, ref);
2631 static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
2632 [UNIT_STUB] = "stub",
2633 [UNIT_LOADED] = "loaded",
2634 [UNIT_ERROR] = "error",
2635 [UNIT_MERGED] = "merged",
2636 [UNIT_MASKED] = "masked"
2639 DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState);
2641 static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = {
2642 [UNIT_ACTIVE] = "active",
2643 [UNIT_RELOADING] = "reloading",
2644 [UNIT_INACTIVE] = "inactive",
2645 [UNIT_FAILED] = "failed",
2646 [UNIT_ACTIVATING] = "activating",
2647 [UNIT_DEACTIVATING] = "deactivating"
2650 DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState);
2652 static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = {
2653 [UNIT_REQUIRES] = "Requires",
2654 [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable",
2655 [UNIT_WANTS] = "Wants",
2656 [UNIT_REQUISITE] = "Requisite",
2657 [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable",
2658 [UNIT_REQUIRED_BY] = "RequiredBy",
2659 [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable",
2660 [UNIT_BIND_TO] = "BindTo",
2661 [UNIT_WANTED_BY] = "WantedBy",
2662 [UNIT_CONFLICTS] = "Conflicts",
2663 [UNIT_CONFLICTED_BY] = "ConflictedBy",
2664 [UNIT_BOUND_BY] = "BoundBy",
2665 [UNIT_BEFORE] = "Before",
2666 [UNIT_AFTER] = "After",
2667 [UNIT_REFERENCES] = "References",
2668 [UNIT_REFERENCED_BY] = "ReferencedBy",
2669 [UNIT_ON_FAILURE] = "OnFailure",
2670 [UNIT_TRIGGERS] = "Triggers",
2671 [UNIT_TRIGGERED_BY] = "TriggeredBy",
2672 [UNIT_PROPAGATE_RELOAD_TO] = "PropagateReloadTo",
2673 [UNIT_PROPAGATE_RELOAD_FROM] = "PropagateReloadFrom"
2676 DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency);