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"
46 const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = {
47 [UNIT_SERVICE] = &service_vtable,
48 [UNIT_TIMER] = &timer_vtable,
49 [UNIT_SOCKET] = &socket_vtable,
50 [UNIT_TARGET] = &target_vtable,
51 [UNIT_DEVICE] = &device_vtable,
52 [UNIT_MOUNT] = &mount_vtable,
53 [UNIT_AUTOMOUNT] = &automount_vtable,
54 [UNIT_SNAPSHOT] = &snapshot_vtable,
55 [UNIT_SWAP] = &swap_vtable,
56 [UNIT_PATH] = &path_vtable
59 Unit *unit_new(Manager *m) {
64 if (!(u = new0(Unit, 1)))
67 if (!(u->meta.names = set_new(string_hash_func, string_compare_func))) {
73 u->meta.type = _UNIT_TYPE_INVALID;
74 u->meta.deserialized_job = _JOB_TYPE_INVALID;
75 u->meta.default_dependencies = true;
80 bool unit_has_name(Unit *u, const char *name) {
84 return !!set_get(u->meta.names, (char*) name);
87 int unit_add_name(Unit *u, const char *text) {
95 if (unit_name_is_template(text)) {
96 if (!u->meta.instance)
99 s = unit_name_replace_instance(text, u->meta.instance);
106 if (!unit_name_is_valid(s, false)) {
111 assert_se((t = unit_name_to_type(s)) >= 0);
113 if (u->meta.type != _UNIT_TYPE_INVALID && t != u->meta.type) {
118 if ((r = unit_name_to_instance(s, &i)) < 0)
121 if (i && unit_vtable[t]->no_instances)
124 /* Ensure that this unit is either instanced or not instanced,
126 if (u->meta.type != _UNIT_TYPE_INVALID && !u->meta.instance != !i) {
131 if (unit_vtable[t]->no_alias &&
132 !set_isempty(u->meta.names) &&
133 !set_get(u->meta.names, s)) {
138 if (hashmap_size(u->meta.manager->units) >= MANAGER_MAX_NAMES) {
143 if ((r = set_put(u->meta.names, s)) < 0) {
149 if ((r = hashmap_put(u->meta.manager->units, s, u)) < 0) {
150 set_remove(u->meta.names, s);
154 if (u->meta.type == _UNIT_TYPE_INVALID) {
158 u->meta.instance = i;
160 LIST_PREPEND(Meta, units_per_type, u->meta.manager->units_per_type[t], &u->meta);
162 if (UNIT_VTABLE(u)->init)
163 UNIT_VTABLE(u)->init(u);
167 unit_add_to_dbus_queue(u);
177 int unit_choose_id(Unit *u, const char *name) {
178 char *s, *t = NULL, *i;
184 if (unit_name_is_template(name)) {
186 if (!u->meta.instance)
189 if (!(t = unit_name_replace_instance(name, u->meta.instance)))
195 /* Selects one of the names of this unit as the id */
196 s = set_get(u->meta.names, (char*) name);
202 if ((r = unit_name_to_instance(s, &i)) < 0)
207 free(u->meta.instance);
208 u->meta.instance = i;
210 unit_add_to_dbus_queue(u);
215 int unit_set_description(Unit *u, const char *description) {
220 if (!(s = strdup(description)))
223 free(u->meta.description);
224 u->meta.description = s;
226 unit_add_to_dbus_queue(u);
230 bool unit_check_gc(Unit *u) {
233 if (u->meta.load_state == UNIT_STUB)
236 if (UNIT_VTABLE(u)->no_gc)
245 if (unit_active_state(u) != UNIT_INACTIVE)
248 if (UNIT_VTABLE(u)->check_gc)
249 if (UNIT_VTABLE(u)->check_gc(u))
255 void unit_add_to_load_queue(Unit *u) {
257 assert(u->meta.type != _UNIT_TYPE_INVALID);
259 if (u->meta.load_state != UNIT_STUB || u->meta.in_load_queue)
262 LIST_PREPEND(Meta, load_queue, u->meta.manager->load_queue, &u->meta);
263 u->meta.in_load_queue = true;
266 void unit_add_to_cleanup_queue(Unit *u) {
269 if (u->meta.in_cleanup_queue)
272 LIST_PREPEND(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta);
273 u->meta.in_cleanup_queue = true;
276 void unit_add_to_gc_queue(Unit *u) {
279 if (u->meta.in_gc_queue || u->meta.in_cleanup_queue)
282 if (unit_check_gc(u))
285 LIST_PREPEND(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta);
286 u->meta.in_gc_queue = true;
288 u->meta.manager->n_in_gc_queue ++;
290 if (u->meta.manager->gc_queue_timestamp <= 0)
291 u->meta.manager->gc_queue_timestamp = now(CLOCK_MONOTONIC);
294 void unit_add_to_dbus_queue(Unit *u) {
296 assert(u->meta.type != _UNIT_TYPE_INVALID);
298 if (u->meta.load_state == UNIT_STUB || u->meta.in_dbus_queue)
301 /* Shortcut things if nobody cares */
302 if (!bus_has_subscriber(u->meta.manager)) {
303 u->meta.sent_dbus_new_signal = true;
307 LIST_PREPEND(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
308 u->meta.in_dbus_queue = true;
311 static void bidi_set_free(Unit *u, Set *s) {
317 /* Frees the set and makes sure we are dropped from the
318 * inverse pointers */
320 SET_FOREACH(other, s, i) {
323 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
324 set_remove(other->meta.dependencies[d], u);
326 unit_add_to_gc_queue(other);
332 void unit_free(Unit *u) {
339 bus_unit_send_removed_signal(u);
341 if (u->meta.load_state != UNIT_STUB)
342 if (UNIT_VTABLE(u)->done)
343 UNIT_VTABLE(u)->done(u);
345 SET_FOREACH(t, u->meta.names, i)
346 hashmap_remove_value(u->meta.manager->units, t, u);
349 job_free(u->meta.job);
351 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
352 bidi_set_free(u, u->meta.dependencies[d]);
354 if (u->meta.type != _UNIT_TYPE_INVALID)
355 LIST_REMOVE(Meta, units_per_type, u->meta.manager->units_per_type[u->meta.type], &u->meta);
357 if (u->meta.in_load_queue)
358 LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta);
360 if (u->meta.in_dbus_queue)
361 LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
363 if (u->meta.in_cleanup_queue)
364 LIST_REMOVE(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta);
366 if (u->meta.in_gc_queue) {
367 LIST_REMOVE(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta);
368 u->meta.manager->n_in_gc_queue--;
371 cgroup_bonding_free_list(u->meta.cgroup_bondings);
373 free(u->meta.description);
374 free(u->meta.fragment_path);
376 set_free_free(u->meta.names);
378 condition_free_list(u->meta.conditions);
380 free(u->meta.instance);
384 UnitActiveState unit_active_state(Unit *u) {
387 if (u->meta.load_state == UNIT_MERGED)
388 return unit_active_state(unit_follow_merge(u));
390 /* After a reload it might happen that a unit is not correctly
391 * loaded but still has a process around. That's why we won't
392 * shortcut failed loading to UNIT_INACTIVE_FAILED. */
394 return UNIT_VTABLE(u)->active_state(u);
397 const char* unit_sub_state_to_string(Unit *u) {
400 return UNIT_VTABLE(u)->sub_state_to_string(u);
403 static void complete_move(Set **s, Set **other) {
411 set_move(*s, *other);
418 static void merge_names(Unit *u, Unit *other) {
425 complete_move(&u->meta.names, &other->meta.names);
427 set_free_free(other->meta.names);
428 other->meta.names = NULL;
429 other->meta.id = NULL;
431 SET_FOREACH(t, u->meta.names, i)
432 assert_se(hashmap_replace(u->meta.manager->units, t, u) == 0);
435 static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) {
442 assert(d < _UNIT_DEPENDENCY_MAX);
444 /* Fix backwards pointers */
445 SET_FOREACH(back, other->meta.dependencies[d], i) {
448 for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++)
449 if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) {
452 set_remove(back->meta.dependencies[k], other);
454 assert(r == -ENOENT);
458 complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]);
460 set_free(other->meta.dependencies[d]);
461 other->meta.dependencies[d] = NULL;
464 int unit_merge(Unit *u, Unit *other) {
469 assert(u->meta.manager == other->meta.manager);
470 assert(u->meta.type != _UNIT_TYPE_INVALID);
472 other = unit_follow_merge(other);
477 if (u->meta.type != other->meta.type)
480 if (!u->meta.instance != !other->meta.instance)
483 if (other->meta.load_state != UNIT_STUB &&
484 other->meta.load_state != UNIT_ERROR)
490 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other)))
494 merge_names(u, other);
496 /* Merge dependencies */
497 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
498 merge_dependencies(u, other, d);
500 other->meta.load_state = UNIT_MERGED;
501 other->meta.merged_into = u;
503 /* If there is still some data attached to the other node, we
504 * don't need it anymore, and can free it. */
505 if (other->meta.load_state != UNIT_STUB)
506 if (UNIT_VTABLE(other)->done)
507 UNIT_VTABLE(other)->done(other);
509 unit_add_to_dbus_queue(u);
510 unit_add_to_cleanup_queue(other);
515 int unit_merge_by_name(Unit *u, const char *name) {
523 if (unit_name_is_template(name)) {
524 if (!u->meta.instance)
527 if (!(s = unit_name_replace_instance(name, u->meta.instance)))
533 if (!(other = manager_get_unit(u->meta.manager, name)))
534 r = unit_add_name(u, name);
536 r = unit_merge(u, other);
542 Unit* unit_follow_merge(Unit *u) {
545 while (u->meta.load_state == UNIT_MERGED)
546 assert_se(u = u->meta.merged_into);
551 int unit_add_exec_dependencies(Unit *u, ExecContext *c) {
557 if (c->std_output != EXEC_OUTPUT_KMSG &&
558 c->std_output != EXEC_OUTPUT_SYSLOG &&
559 c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE &&
560 c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE &&
561 c->std_error != EXEC_OUTPUT_KMSG &&
562 c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE &&
563 c->std_error != EXEC_OUTPUT_KMSG &&
564 c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE)
567 /* If syslog or kernel logging is requested, make sure our own
568 * logging daemon is run first. */
570 if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0)
573 if (u->meta.manager->running_as == MANAGER_SYSTEM)
574 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0)
580 const char *unit_description(Unit *u) {
583 if (u->meta.description)
584 return u->meta.description;
586 return strna(u->meta.id);
589 void unit_dump(Unit *u, FILE *f, const char *prefix) {
597 timestamp1[FORMAT_TIMESTAMP_MAX],
598 timestamp2[FORMAT_TIMESTAMP_MAX],
599 timestamp3[FORMAT_TIMESTAMP_MAX],
600 timestamp4[FORMAT_TIMESTAMP_MAX],
601 timespan[FORMAT_TIMESPAN_MAX];
605 assert(u->meta.type >= 0);
609 p2 = strappend(prefix, "\t");
610 prefix2 = p2 ? p2 : prefix;
614 "%s\tDescription: %s\n"
616 "%s\tUnit Load State: %s\n"
617 "%s\tUnit Active State: %s\n"
618 "%s\tInactive Exit Timestamp: %s\n"
619 "%s\tActive Enter Timestamp: %s\n"
620 "%s\tActive Exit Timestamp: %s\n"
621 "%s\tInactive Enter Timestamp: %s\n"
622 "%s\tGC Check Good: %s\n"
623 "%s\tNeed Daemon Reload: %s\n",
625 prefix, unit_description(u),
626 prefix, strna(u->meta.instance),
627 prefix, unit_load_state_to_string(u->meta.load_state),
628 prefix, unit_active_state_to_string(unit_active_state(u)),
629 prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.inactive_exit_timestamp.realtime)),
630 prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)),
631 prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)),
632 prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)),
633 prefix, yes_no(unit_check_gc(u)),
634 prefix, yes_no(unit_need_daemon_reload(u)));
636 SET_FOREACH(t, u->meta.names, i)
637 fprintf(f, "%s\tName: %s\n", prefix, t);
639 if ((following = unit_following(u)))
640 fprintf(f, "%s\tFollowing: %s\n", prefix, following->meta.id);
642 if (u->meta.fragment_path)
643 fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path);
645 if (u->meta.job_timeout > 0)
646 fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->meta.job_timeout));
648 condition_dump_list(u->meta.conditions, f, prefix);
650 if (dual_timestamp_is_set(&u->meta.condition_timestamp))
652 "%s\tCondition Timestamp: %s\n"
653 "%s\tCondition Result: %s\n",
654 prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.condition_timestamp.realtime)),
655 prefix, yes_no(u->meta.condition_result));
657 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) {
660 SET_FOREACH(other, u->meta.dependencies[d], i)
661 fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id);
664 if (u->meta.load_state == UNIT_LOADED) {
666 "%s\tStopWhenUnneeded: %s\n"
667 "%s\tRefuseManualStart: %s\n"
668 "%s\tRefuseManualStop: %s\n"
669 "%s\tDefaultDependencies: %s\n",
670 prefix, yes_no(u->meta.stop_when_unneeded),
671 prefix, yes_no(u->meta.refuse_manual_start),
672 prefix, yes_no(u->meta.refuse_manual_stop),
673 prefix, yes_no(u->meta.default_dependencies));
675 LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings)
676 fprintf(f, "%s\tControlGroup: %s:%s\n",
677 prefix, b->controller, b->path);
679 if (UNIT_VTABLE(u)->dump)
680 UNIT_VTABLE(u)->dump(u, f, prefix2);
682 } else if (u->meta.load_state == UNIT_MERGED)
684 "%s\tMerged into: %s\n",
685 prefix, u->meta.merged_into->meta.id);
686 else if (u->meta.load_state == UNIT_ERROR)
687 fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->meta.load_error));
691 job_dump(u->meta.job, f, prefix2);
696 /* Common implementation for multiple backends */
697 int unit_load_fragment_and_dropin(Unit *u) {
702 /* Load a .service file */
703 if ((r = unit_load_fragment(u)) < 0)
706 if (u->meta.load_state == UNIT_STUB)
709 /* Load drop-in directory data */
710 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
716 /* Common implementation for multiple backends */
717 int unit_load_fragment_and_dropin_optional(Unit *u) {
722 /* Same as unit_load_fragment_and_dropin(), but whether
723 * something can be loaded or not doesn't matter. */
725 /* Load a .service file */
726 if ((r = unit_load_fragment(u)) < 0)
729 if (u->meta.load_state == UNIT_STUB)
730 u->meta.load_state = UNIT_LOADED;
732 /* Load drop-in directory data */
733 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
739 int unit_add_default_target_dependency(Unit *u, Unit *target) {
743 if (target->meta.type != UNIT_TARGET)
746 /* Only add the dependency if both units are loaded, so that
747 * that loop check below is reliable */
748 if (u->meta.load_state != UNIT_LOADED ||
749 target->meta.load_state != UNIT_LOADED)
752 /* If either side wants no automatic dependencies, then let's
754 if (!u->meta.default_dependencies ||
755 target->meta.default_dependencies)
758 /* Don't create loops */
759 if (set_get(target->meta.dependencies[UNIT_BEFORE], u))
762 return unit_add_dependency(target, UNIT_AFTER, u, true);
765 static int unit_add_default_dependencies(Unit *u) {
766 static const UnitDependency deps[] = {
768 UNIT_REQUIRED_BY_OVERRIDABLE,
780 for (k = 0; k < ELEMENTSOF(deps); k++)
781 SET_FOREACH(target, u->meta.dependencies[deps[k]], i)
782 if ((r = unit_add_default_target_dependency(u, target)) < 0)
788 int unit_load(Unit *u) {
793 if (u->meta.in_load_queue) {
794 LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta);
795 u->meta.in_load_queue = false;
798 if (u->meta.type == _UNIT_TYPE_INVALID)
801 if (u->meta.load_state != UNIT_STUB)
804 if (UNIT_VTABLE(u)->load)
805 if ((r = UNIT_VTABLE(u)->load(u)) < 0)
808 if (u->meta.load_state == UNIT_STUB) {
813 if (u->meta.load_state == UNIT_LOADED &&
814 u->meta.default_dependencies)
815 if ((r = unit_add_default_dependencies(u)) < 0)
818 assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into);
820 unit_add_to_dbus_queue(unit_follow_merge(u));
821 unit_add_to_gc_queue(u);
826 u->meta.load_state = UNIT_ERROR;
827 u->meta.load_error = r;
828 unit_add_to_dbus_queue(u);
830 log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r));
835 bool unit_condition_test(Unit *u) {
838 dual_timestamp_get(&u->meta.condition_timestamp);
839 u->meta.condition_result = condition_test_list(u->meta.conditions);
841 return u->meta.condition_result;
845 * -EBADR: This unit type does not support starting.
846 * -EALREADY: Unit is already started.
847 * -EAGAIN: An operation is already in progress. Retry later.
848 * -ECANCELED: Too many requests for now.
850 int unit_start(Unit *u) {
851 UnitActiveState state;
856 if (u->meta.load_state != UNIT_LOADED)
859 /* If this is already (being) started, then this will
860 * succeed. Note that this will even succeed if this unit is
861 * not startable by the user. This is relied on to detect when
862 * we need to wait for units and when waiting is finished. */
863 state = unit_active_state(u);
864 if (UNIT_IS_ACTIVE_OR_RELOADING(state))
867 /* If the conditions failed, don't do anything at all */
868 if (!unit_condition_test(u)) {
869 log_debug("Starting of %s requested but condition failed. Ignoring.", u->meta.id);
873 /* Forward to the main object, if we aren't it. */
874 if ((following = unit_following(u))) {
875 log_debug("Redirecting start request from %s to %s.", u->meta.id, following->meta.id);
876 return unit_start(following);
879 /* If it is stopped, but we cannot start it, then fail */
880 if (!UNIT_VTABLE(u)->start)
883 /* We don't suppress calls to ->start() here when we are
884 * already starting, to allow this request to be used as a
885 * "hurry up" call, for example when the unit is in some "auto
886 * restart" state where it waits for a holdoff timer to elapse
887 * before it will start again. */
889 unit_add_to_dbus_queue(u);
891 unit_status_printf(u, "Starting %s...\n", unit_description(u));
892 return UNIT_VTABLE(u)->start(u);
895 bool unit_can_start(Unit *u) {
898 return !!UNIT_VTABLE(u)->start;
901 bool unit_can_isolate(Unit *u) {
904 return unit_can_start(u) &&
905 u->meta.allow_isolate;
909 * -EBADR: This unit type does not support stopping.
910 * -EALREADY: Unit is already stopped.
911 * -EAGAIN: An operation is already in progress. Retry later.
913 int unit_stop(Unit *u) {
914 UnitActiveState state;
919 state = unit_active_state(u);
920 if (UNIT_IS_INACTIVE_OR_FAILED(state))
923 if ((following = unit_following(u))) {
924 log_debug("Redirecting stop request from %s to %s.", u->meta.id, following->meta.id);
925 return unit_stop(following);
928 if (!UNIT_VTABLE(u)->stop)
931 unit_add_to_dbus_queue(u);
933 unit_status_printf(u, "Stopping %s...\n", unit_description(u));
934 return UNIT_VTABLE(u)->stop(u);
938 * -EBADR: This unit type does not support reloading.
939 * -ENOEXEC: Unit is not started.
940 * -EAGAIN: An operation is already in progress. Retry later.
942 int unit_reload(Unit *u) {
943 UnitActiveState state;
948 if (u->meta.load_state != UNIT_LOADED)
951 if (!unit_can_reload(u))
954 state = unit_active_state(u);
955 if (state == UNIT_RELOADING)
958 if (state != UNIT_ACTIVE)
961 if ((following = unit_following(u))) {
962 log_debug("Redirecting reload request from %s to %s.", u->meta.id, following->meta.id);
963 return unit_reload(following);
966 unit_add_to_dbus_queue(u);
967 return UNIT_VTABLE(u)->reload(u);
970 bool unit_can_reload(Unit *u) {
973 if (!UNIT_VTABLE(u)->reload)
976 if (!UNIT_VTABLE(u)->can_reload)
979 return UNIT_VTABLE(u)->can_reload(u);
982 static void unit_check_unneeded(Unit *u) {
988 /* If this service shall be shut down when unneeded then do
991 if (!u->meta.stop_when_unneeded)
994 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
997 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
998 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1001 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
1002 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1005 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i)
1006 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1009 SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i)
1010 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1013 log_info("Service %s is not needed anymore. Stopping.", u->meta.id);
1015 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
1016 manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL);
1019 static void retroactively_start_dependencies(Unit *u) {
1024 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)));
1026 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
1027 if (!set_get(u->meta.dependencies[UNIT_AFTER], other) &&
1028 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1029 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1031 SET_FOREACH(other, u->meta.dependencies[UNIT_BIND_TO], i)
1032 if (!set_get(u->meta.dependencies[UNIT_AFTER], other) &&
1033 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1034 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1036 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1037 if (!set_get(u->meta.dependencies[UNIT_AFTER], other) &&
1038 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1039 manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
1041 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i)
1042 if (!set_get(u->meta.dependencies[UNIT_AFTER], other) &&
1043 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1044 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1046 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i)
1047 if (!set_get(u->meta.dependencies[UNIT_AFTER], other) &&
1048 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1049 manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
1051 SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i)
1052 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1053 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
1055 SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTED_BY], i)
1056 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1057 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
1060 static void retroactively_stop_dependencies(Unit *u) {
1065 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)));
1067 /* Pull down units which are bound to us recursively if enabled */
1068 SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i)
1069 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1070 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
1072 /* Garbage collect services that might not be needed anymore, if enabled */
1073 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
1074 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1075 unit_check_unneeded(other);
1076 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1077 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1078 unit_check_unneeded(other);
1079 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i)
1080 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1081 unit_check_unneeded(other);
1082 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i)
1083 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1084 unit_check_unneeded(other);
1085 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
1086 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1087 unit_check_unneeded(other);
1088 SET_FOREACH(other, u->meta.dependencies[UNIT_BIND_TO], i)
1089 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1090 unit_check_unneeded(other);
1093 void unit_trigger_on_failure(Unit *u) {
1099 SET_FOREACH(other, u->meta.dependencies[UNIT_ON_FAILURE], i)
1100 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1103 void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) {
1107 assert(os < _UNIT_ACTIVE_STATE_MAX);
1108 assert(ns < _UNIT_ACTIVE_STATE_MAX);
1110 /* Note that this is called for all low-level state changes,
1111 * even if they might map to the same high-level
1112 * UnitActiveState! That means that ns == os is OK an expected
1113 * behaviour here. For example: if a mount point is remounted
1114 * this function will be called too! */
1116 if (u->meta.manager->n_deserializing <= 0) {
1119 dual_timestamp_get(&ts);
1121 if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns))
1122 u->meta.inactive_exit_timestamp = ts;
1123 else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns))
1124 u->meta.inactive_enter_timestamp = ts;
1126 if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns))
1127 u->meta.active_enter_timestamp = ts;
1128 else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns))
1129 u->meta.active_exit_timestamp = ts;
1131 timer_unit_notify(u, ns);
1132 path_unit_notify(u, ns);
1135 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1136 cgroup_bonding_trim_list(u->meta.cgroup_bondings, true);
1141 if (u->meta.job->state == JOB_WAITING)
1143 /* So we reached a different state for this
1144 * job. Let's see if we can run it now if it
1145 * failed previously due to EAGAIN. */
1146 job_add_to_run_queue(u->meta.job);
1148 /* Let's check whether this state change constitutes a
1149 * finished job, or maybe contradicts a running job and
1150 * hence needs to invalidate jobs. */
1152 switch (u->meta.job->type) {
1155 case JOB_VERIFY_ACTIVE:
1157 if (UNIT_IS_ACTIVE_OR_RELOADING(ns))
1158 job_finish_and_invalidate(u->meta.job, JOB_DONE);
1159 else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) {
1162 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1163 job_finish_and_invalidate(u->meta.job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE);
1169 case JOB_RELOAD_OR_START:
1171 if (u->meta.job->state == JOB_RUNNING) {
1172 if (ns == UNIT_ACTIVE)
1173 job_finish_and_invalidate(u->meta.job, reload_success ? JOB_DONE : JOB_FAILED);
1174 else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) {
1177 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1178 job_finish_and_invalidate(u->meta.job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE);
1186 case JOB_TRY_RESTART:
1188 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1189 job_finish_and_invalidate(u->meta.job, JOB_DONE);
1190 else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) {
1192 job_finish_and_invalidate(u->meta.job, JOB_FAILED);
1198 assert_not_reached("Job type unknown");
1204 if (u->meta.manager->n_deserializing <= 0) {
1206 /* If this state change happened without being
1207 * requested by a job, then let's retroactively start
1208 * or stop dependencies. We skip that step when
1209 * deserializing, since we don't want to create any
1210 * additional jobs just because something is already
1214 if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns))
1215 retroactively_start_dependencies(u);
1216 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
1217 retroactively_stop_dependencies(u);
1220 if (ns != os && ns == UNIT_FAILED) {
1221 log_notice("Unit %s entered failed state.", u->meta.id);
1222 unit_trigger_on_failure(u);
1226 /* Some names are special */
1227 if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
1229 if (unit_has_name(u, SPECIAL_DBUS_SERVICE))
1230 /* The bus just might have become available,
1231 * hence try to connect to it, if we aren't
1233 bus_init(u->meta.manager, true);
1235 if (u->meta.type == UNIT_SERVICE &&
1236 !UNIT_IS_ACTIVE_OR_RELOADING(os) &&
1237 u->meta.manager->n_deserializing <= 0) {
1238 /* Write audit record if we have just finished starting up */
1239 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, true);
1240 u->meta.in_audit = true;
1243 if (!UNIT_IS_ACTIVE_OR_RELOADING(os))
1244 manager_send_unit_plymouth(u->meta.manager, u);
1248 /* We don't care about D-Bus here, since we'll get an
1249 * asynchronous notification for it anyway. */
1251 if (u->meta.type == UNIT_SERVICE &&
1252 UNIT_IS_INACTIVE_OR_FAILED(ns) &&
1253 !UNIT_IS_INACTIVE_OR_FAILED(os) &&
1254 u->meta.manager->n_deserializing <= 0) {
1256 /* Hmm, if there was no start record written
1257 * write it now, so that we always have a nice
1259 if (!u->meta.in_audit) {
1260 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE);
1262 if (ns == UNIT_INACTIVE)
1263 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, true);
1265 /* Write audit record if we have just finished shutting down */
1266 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE);
1268 u->meta.in_audit = false;
1272 manager_recheck_syslog(u->meta.manager);
1274 /* Maybe we finished startup and are now ready for being
1275 * stopped because unneeded? */
1276 unit_check_unneeded(u);
1278 unit_add_to_dbus_queue(u);
1279 unit_add_to_gc_queue(u);
1282 int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) {
1283 struct epoll_event ev;
1288 assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u));
1294 if (epoll_ctl(u->meta.manager->epoll_fd,
1295 w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD,
1307 void unit_unwatch_fd(Unit *u, Watch *w) {
1311 if (w->type == WATCH_INVALID)
1314 assert(w->type == WATCH_FD);
1315 assert(w->data.unit == u);
1316 assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
1319 w->type = WATCH_INVALID;
1320 w->data.unit = NULL;
1323 int unit_watch_pid(Unit *u, pid_t pid) {
1327 /* Watch a specific PID. We only support one unit watching
1328 * each PID for now. */
1330 return hashmap_put(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u);
1333 void unit_unwatch_pid(Unit *u, pid_t pid) {
1337 hashmap_remove_value(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u);
1340 int unit_watch_timer(Unit *u, usec_t delay, Watch *w) {
1341 struct itimerspec its;
1347 assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u));
1349 /* This will try to reuse the old timer if there is one */
1351 if (w->type == WATCH_UNIT_TIMER) {
1352 assert(w->data.unit == u);
1357 } else if (w->type == WATCH_INVALID) {
1360 if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
1363 assert_not_reached("Invalid watch type");
1368 /* Set absolute time in the past, but not 0, since we
1369 * don't want to disarm the timer */
1370 its.it_value.tv_sec = 0;
1371 its.it_value.tv_nsec = 1;
1373 flags = TFD_TIMER_ABSTIME;
1375 timespec_store(&its.it_value, delay);
1379 /* This will also flush the elapse counter */
1380 if (timerfd_settime(fd, flags, &its, NULL) < 0)
1383 if (w->type == WATCH_INVALID) {
1384 struct epoll_event ev;
1388 ev.events = EPOLLIN;
1390 if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0)
1394 w->type = WATCH_UNIT_TIMER;
1402 close_nointr_nofail(fd);
1407 void unit_unwatch_timer(Unit *u, Watch *w) {
1411 if (w->type == WATCH_INVALID)
1414 assert(w->type == WATCH_UNIT_TIMER);
1415 assert(w->data.unit == u);
1418 assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
1419 close_nointr_nofail(w->fd);
1422 w->type = WATCH_INVALID;
1423 w->data.unit = NULL;
1426 bool unit_job_is_applicable(Unit *u, JobType j) {
1428 assert(j >= 0 && j < _JOB_TYPE_MAX);
1432 case JOB_VERIFY_ACTIVE:
1438 case JOB_TRY_RESTART:
1439 return unit_can_start(u);
1442 return unit_can_reload(u);
1444 case JOB_RELOAD_OR_START:
1445 return unit_can_reload(u) && unit_can_start(u);
1448 assert_not_reached("Invalid job type");
1452 int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) {
1454 static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = {
1455 [UNIT_REQUIRES] = UNIT_REQUIRED_BY,
1456 [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
1457 [UNIT_WANTS] = UNIT_WANTED_BY,
1458 [UNIT_REQUISITE] = UNIT_REQUIRED_BY,
1459 [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
1460 [UNIT_BIND_TO] = UNIT_BOUND_BY,
1461 [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID,
1462 [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID,
1463 [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID,
1464 [UNIT_BOUND_BY] = UNIT_BIND_TO,
1465 [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY,
1466 [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS,
1467 [UNIT_BEFORE] = UNIT_AFTER,
1468 [UNIT_AFTER] = UNIT_BEFORE,
1469 [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID,
1470 [UNIT_REFERENCES] = UNIT_REFERENCED_BY,
1471 [UNIT_REFERENCED_BY] = UNIT_REFERENCES
1473 int r, q = 0, v = 0, w = 0;
1476 assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX);
1479 u = unit_follow_merge(u);
1480 other = unit_follow_merge(other);
1482 /* We won't allow dependencies on ourselves. We will not
1483 * consider them an error however. */
1487 if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0)
1490 if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
1491 if ((r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0)
1495 if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 ||
1496 (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0)
1499 if ((q = set_put(u->meta.dependencies[d], other)) < 0)
1502 if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
1503 if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) {
1508 if (add_reference) {
1509 if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) {
1514 if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0)
1518 unit_add_to_dbus_queue(u);
1523 set_remove(u->meta.dependencies[d], other);
1526 set_remove(other->meta.dependencies[inverse_table[d]], u);
1529 set_remove(u->meta.dependencies[UNIT_REFERENCES], other);
1534 int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) {
1539 if ((r = unit_add_dependency(u, d, other, add_reference)) < 0)
1542 if ((r = unit_add_dependency(u, e, other, add_reference)) < 0)
1548 static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) {
1552 assert(name || path);
1555 name = file_name_from_path(path);
1557 if (!unit_name_is_template(name)) {
1562 if (u->meta.instance)
1563 s = unit_name_replace_instance(name, u->meta.instance);
1567 if (!(i = unit_name_to_prefix(u->meta.id)))
1570 s = unit_name_replace_instance(name, i);
1581 int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
1587 assert(name || path);
1589 if (!(name = resolve_template(u, name, path, &s)))
1592 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1595 r = unit_add_dependency(u, d, other, add_reference);
1602 int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
1608 assert(name || path);
1610 if (!(name = resolve_template(u, name, path, &s)))
1613 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1616 r = unit_add_two_dependencies(u, d, e, other, add_reference);
1623 int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
1629 assert(name || path);
1631 if (!(name = resolve_template(u, name, path, &s)))
1634 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1637 r = unit_add_dependency(other, d, u, add_reference);
1644 int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
1650 assert(name || path);
1652 if (!(name = resolve_template(u, name, path, &s)))
1655 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1658 if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0)
1666 int set_unit_path(const char *p) {
1670 /* This is mostly for debug purposes */
1672 if (path_is_absolute(p)) {
1673 if (!(c = strdup(p)))
1676 if (!(cwd = get_current_dir_name()))
1679 r = asprintf(&c, "%s/%s", cwd, p);
1686 if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) {
1695 char *unit_dbus_path(Unit *u) {
1703 if (!(e = bus_path_escape(u->meta.id)))
1706 p = strappend("/org/freedesktop/systemd1/unit/", e);
1712 int unit_add_cgroup(Unit *u, CGroupBonding *b) {
1721 if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER)))
1724 /* Ensure this hasn't been added yet */
1727 if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) {
1730 l = hashmap_get(u->meta.manager->cgroup_bondings, b->path);
1731 LIST_PREPEND(CGroupBonding, by_path, l, b);
1733 if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) {
1734 LIST_REMOVE(CGroupBonding, by_path, l, b);
1739 LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b);
1745 static char *default_cgroup_path(Unit *u) {
1751 if (u->meta.instance) {
1754 if (!(t = unit_name_template(u->meta.id)))
1757 r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance);
1760 r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id);
1762 return r < 0 ? NULL : p;
1765 int unit_add_cgroup_from_text(Unit *u, const char *name) {
1766 char *controller = NULL, *path = NULL;
1767 CGroupBonding *b = NULL;
1773 if ((r = cg_split_spec(name, &controller, &path)) < 0)
1777 path = default_cgroup_path(u);
1780 controller = strdup(SYSTEMD_CGROUP_CONTROLLER);
1782 if (!path || !controller) {
1789 if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) {
1794 if (!(b = new0(CGroupBonding, 1))) {
1799 b->controller = controller;
1803 if ((r = unit_add_cgroup(u, b)) < 0)
1816 static int unit_add_one_default_cgroup(Unit *u, const char *controller) {
1817 CGroupBonding *b = NULL;
1823 controller = SYSTEMD_CGROUP_CONTROLLER;
1825 if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller))
1828 if (!(b = new0(CGroupBonding, 1)))
1831 if (!(b->controller = strdup(controller)))
1834 if (!(b->path = default_cgroup_path(u)))
1838 b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER);
1840 if ((r = unit_add_cgroup(u, b)) < 0)
1847 free(b->controller);
1853 int unit_add_default_cgroups(Unit *u) {
1858 /* Adds in the default cgroups, if they weren't specified
1861 if ((r = unit_add_one_default_cgroup(u, NULL)) < 0)
1864 STRV_FOREACH(c, u->meta.manager->default_controllers)
1865 if ((r = unit_add_one_default_cgroup(u, *c)) < 0)
1871 CGroupBonding* unit_get_default_cgroup(Unit *u) {
1874 return cgroup_bonding_find_list(u->meta.cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER);
1877 int unit_load_related_unit(Unit *u, const char *type, Unit **_found) {
1885 if (!(t = unit_name_change_suffix(u->meta.id, type)))
1888 assert(!unit_has_name(u, t));
1890 r = manager_load_unit(u->meta.manager, t, NULL, NULL, _found);
1893 assert(r < 0 || *_found != u);
1898 int unit_get_related_unit(Unit *u, const char *type, Unit **_found) {
1906 if (!(t = unit_name_change_suffix(u->meta.id, type)))
1909 assert(!unit_has_name(u, t));
1911 found = manager_get_unit(u->meta.manager, t);
1921 static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) {
1925 return unit_name_to_prefix_and_instance(u->meta.id);
1928 static char *specifier_prefix(char specifier, void *data, void *userdata) {
1932 return unit_name_to_prefix(u->meta.id);
1935 static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) {
1941 if (!(p = unit_name_to_prefix(u->meta.id)))
1944 r = unit_name_unescape(p);
1950 static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) {
1954 if (u->meta.instance)
1955 return unit_name_unescape(u->meta.instance);
1960 static char *specifier_filename(char specifier, void *data, void *userdata) {
1964 if (u->meta.instance)
1965 return unit_name_path_unescape(u->meta.instance);
1967 return unit_name_to_path(u->meta.instance);
1970 char *unit_name_printf(Unit *u, const char* format) {
1973 * This will use the passed string as format string and
1974 * replace the following specifiers:
1976 * %n: the full id of the unit (foo@bar.waldo)
1977 * %N: the id of the unit without the suffix (foo@bar)
1978 * %p: the prefix (foo)
1979 * %i: the instance (bar)
1982 const Specifier table[] = {
1983 { 'n', specifier_string, u->meta.id },
1984 { 'N', specifier_prefix_and_instance, NULL },
1985 { 'p', specifier_prefix, NULL },
1986 { 'i', specifier_string, u->meta.instance },
1993 return specifier_printf(format, table, u);
1996 char *unit_full_printf(Unit *u, const char *format) {
1998 /* This is similar to unit_name_printf() but also supports
2001 const Specifier table[] = {
2002 { 'n', specifier_string, u->meta.id },
2003 { 'N', specifier_prefix_and_instance, NULL },
2004 { 'p', specifier_prefix, NULL },
2005 { 'P', specifier_prefix_unescaped, NULL },
2006 { 'i', specifier_string, u->meta.instance },
2007 { 'I', specifier_instance_unescaped, NULL },
2008 { 'f', specifier_filename, NULL },
2015 return specifier_printf(format, table, u);
2018 char **unit_full_printf_strv(Unit *u, char **l) {
2022 /* Applies unit_full_printf to every entry in l */
2027 if (!(r = new(char*, n+1)))
2030 for (i = l, j = r; *i; i++, j++)
2031 if (!(*j = unit_full_printf(u, *i)))
2038 for (j--; j >= r; j--)
2046 int unit_watch_bus_name(Unit *u, const char *name) {
2050 /* Watch a specific name on the bus. We only support one unit
2051 * watching each name for now. */
2053 return hashmap_put(u->meta.manager->watch_bus, name, u);
2056 void unit_unwatch_bus_name(Unit *u, const char *name) {
2060 hashmap_remove_value(u->meta.manager->watch_bus, name, u);
2063 bool unit_can_serialize(Unit *u) {
2066 return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item;
2069 int unit_serialize(Unit *u, FILE *f, FDSet *fds) {
2076 if (!unit_can_serialize(u))
2079 if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0)
2083 unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type));
2085 dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->meta.inactive_exit_timestamp);
2086 dual_timestamp_serialize(f, "active-enter-timestamp", &u->meta.active_enter_timestamp);
2087 dual_timestamp_serialize(f, "active-exit-timestamp", &u->meta.active_exit_timestamp);
2088 dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->meta.inactive_enter_timestamp);
2089 dual_timestamp_serialize(f, "condition-timestamp", &u->meta.condition_timestamp);
2091 if (dual_timestamp_is_set(&u->meta.condition_timestamp))
2092 unit_serialize_item(u, f, "condition-result", yes_no(u->meta.condition_result));
2099 void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) {
2110 va_start(ap, format);
2111 vfprintf(f, format, ap);
2117 void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) {
2123 fprintf(f, "%s=%s\n", key, value);
2126 int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
2133 if (!unit_can_serialize(u))
2137 char line[1024], *l, *v;
2140 if (!fgets(line, sizeof(line), f)) {
2153 k = strcspn(l, "=");
2161 if (streq(l, "job")) {
2164 if ((type = job_type_from_string(v)) < 0)
2165 log_debug("Failed to parse job type value %s", v);
2167 u->meta.deserialized_job = type;
2170 } else if (streq(l, "inactive-exit-timestamp")) {
2171 dual_timestamp_deserialize(v, &u->meta.inactive_exit_timestamp);
2173 } else if (streq(l, "active-enter-timestamp")) {
2174 dual_timestamp_deserialize(v, &u->meta.active_enter_timestamp);
2176 } else if (streq(l, "active-exit-timestamp")) {
2177 dual_timestamp_deserialize(v, &u->meta.active_exit_timestamp);
2179 } else if (streq(l, "inactive-enter-timestamp")) {
2180 dual_timestamp_deserialize(v, &u->meta.inactive_enter_timestamp);
2182 } else if (streq(l, "condition-timestamp")) {
2183 dual_timestamp_deserialize(v, &u->meta.condition_timestamp);
2185 } else if (streq(l, "condition-result")) {
2188 if ((b = parse_boolean(v)) < 0)
2189 log_debug("Failed to parse condition result value %s", v);
2191 u->meta.condition_result = b;
2196 if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0)
2201 int unit_add_node_link(Unit *u, const char *what, bool wants) {
2211 /* Adds in links to the device node that this unit is based on */
2213 if (!is_device_path(what))
2216 if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
2219 r = manager_load_unit(u->meta.manager, e, NULL, NULL, &device);
2225 if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BIND_TO, device, true)) < 0)
2229 if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0)
2235 int unit_coldplug(Unit *u) {
2240 if (UNIT_VTABLE(u)->coldplug)
2241 if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0)
2244 if (u->meta.deserialized_job >= 0) {
2245 if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_IGNORE_DEPENDENCIES, false, NULL, NULL)) < 0)
2248 u->meta.deserialized_job = _JOB_TYPE_INVALID;
2254 void unit_status_printf(Unit *u, const char *format, ...) {
2260 if (!UNIT_VTABLE(u)->show_status)
2263 if (u->meta.manager->running_as != MANAGER_SYSTEM)
2266 /* If Plymouth is running make sure we show the status, so
2267 * that there's something nice to see when people press Esc */
2269 if (!u->meta.manager->show_status && !plymouth_running())
2272 if (!manager_is_booting_or_shutting_down(u->meta.manager))
2275 va_start(ap, format);
2276 status_vprintf(format, ap);
2280 bool unit_need_daemon_reload(Unit *u) {
2285 if (!u->meta.fragment_path)
2289 if (stat(u->meta.fragment_path, &st) < 0)
2290 /* What, cannot access this anymore? */
2294 u->meta.fragment_mtime &&
2295 timespec_load(&st.st_mtim) != u->meta.fragment_mtime;
2298 void unit_reset_failed(Unit *u) {
2301 if (UNIT_VTABLE(u)->reset_failed)
2302 UNIT_VTABLE(u)->reset_failed(u);
2305 Unit *unit_following(Unit *u) {
2308 if (UNIT_VTABLE(u)->following)
2309 return UNIT_VTABLE(u)->following(u);
2314 bool unit_pending_inactive(Unit *u) {
2317 /* Returns true if the unit is inactive or going down */
2319 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)))
2322 if (u->meta.job && u->meta.job->type == JOB_STOP)
2328 bool unit_pending_active(Unit *u) {
2331 /* Returns true if the unit is inactive or going down */
2333 if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
2337 (u->meta.job->type == JOB_START ||
2338 u->meta.job->type == JOB_RELOAD_OR_START ||
2339 u->meta.job->type == JOB_RESTART))
2345 UnitType unit_name_to_type(const char *n) {
2350 for (t = 0; t < _UNIT_TYPE_MAX; t++)
2351 if (endswith(n, unit_vtable[t]->suffix))
2354 return _UNIT_TYPE_INVALID;
2357 bool unit_name_is_valid(const char *n, bool template_ok) {
2360 t = unit_name_to_type(n);
2361 if (t < 0 || t >= _UNIT_TYPE_MAX)
2364 return unit_name_is_valid_no_type(n, template_ok);
2367 int unit_kill(Unit *u, KillWho w, KillMode m, int signo, DBusError *error) {
2369 assert(w >= 0 && w < _KILL_WHO_MAX);
2370 assert(m >= 0 && m < _KILL_MODE_MAX);
2372 assert(signo < _NSIG);
2377 if (!UNIT_VTABLE(u)->kill)
2380 return UNIT_VTABLE(u)->kill(u, w, m, signo, error);
2384 int unit_following_set(Unit *u, Set **s) {
2388 if (UNIT_VTABLE(u)->following_set)
2389 return UNIT_VTABLE(u)->following_set(u, s);
2395 static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
2396 [UNIT_STUB] = "stub",
2397 [UNIT_LOADED] = "loaded",
2398 [UNIT_ERROR] = "error",
2399 [UNIT_MERGED] = "merged",
2400 [UNIT_MASKED] = "masked"
2403 DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState);
2405 static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = {
2406 [UNIT_ACTIVE] = "active",
2407 [UNIT_RELOADING] = "reloading",
2408 [UNIT_INACTIVE] = "inactive",
2409 [UNIT_FAILED] = "failed",
2410 [UNIT_ACTIVATING] = "activating",
2411 [UNIT_DEACTIVATING] = "deactivating"
2414 DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState);
2416 static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = {
2417 [UNIT_REQUIRES] = "Requires",
2418 [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable",
2419 [UNIT_WANTS] = "Wants",
2420 [UNIT_REQUISITE] = "Requisite",
2421 [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable",
2422 [UNIT_REQUIRED_BY] = "RequiredBy",
2423 [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable",
2424 [UNIT_BIND_TO] = "BindTo",
2425 [UNIT_WANTED_BY] = "WantedBy",
2426 [UNIT_CONFLICTS] = "Conflicts",
2427 [UNIT_CONFLICTED_BY] = "ConflictedBy",
2428 [UNIT_BOUND_BY] = "BoundBy",
2429 [UNIT_BEFORE] = "Before",
2430 [UNIT_AFTER] = "After",
2431 [UNIT_REFERENCES] = "References",
2432 [UNIT_REFERENCED_BY] = "ReferencedBy",
2433 [UNIT_ON_FAILURE] = "OnFailure"
2436 DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency);