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)) {
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 free(u->meta.instance);
383 UnitActiveState unit_active_state(Unit *u) {
386 if (u->meta.load_state == UNIT_MERGED)
387 return unit_active_state(unit_follow_merge(u));
389 /* After a reload it might happen that a unit is not correctly
390 * loaded but still has a process around. That's why we won't
391 * shortcut failed loading to UNIT_INACTIVE_FAILED. */
393 return UNIT_VTABLE(u)->active_state(u);
396 const char* unit_sub_state_to_string(Unit *u) {
399 return UNIT_VTABLE(u)->sub_state_to_string(u);
402 static void complete_move(Set **s, Set **other) {
410 set_move(*s, *other);
417 static void merge_names(Unit *u, Unit *other) {
424 complete_move(&u->meta.names, &other->meta.names);
426 set_free_free(other->meta.names);
427 other->meta.names = NULL;
428 other->meta.id = NULL;
430 SET_FOREACH(t, u->meta.names, i)
431 assert_se(hashmap_replace(u->meta.manager->units, t, u) == 0);
434 static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) {
441 assert(d < _UNIT_DEPENDENCY_MAX);
443 SET_FOREACH(back, other->meta.dependencies[d], i) {
446 for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++)
447 if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) {
450 set_remove(back->meta.dependencies[k], other);
452 assert(r == -ENOENT);
456 complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]);
458 set_free(other->meta.dependencies[d]);
459 other->meta.dependencies[d] = NULL;
462 int unit_merge(Unit *u, Unit *other) {
467 assert(u->meta.manager == other->meta.manager);
468 assert(u->meta.type != _UNIT_TYPE_INVALID);
470 other = unit_follow_merge(other);
475 if (u->meta.type != other->meta.type)
478 if (!u->meta.instance != !other->meta.instance)
481 if (other->meta.load_state != UNIT_STUB &&
482 other->meta.load_state != UNIT_ERROR)
488 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other)))
492 merge_names(u, other);
494 /* Merge dependencies */
495 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
496 merge_dependencies(u, other, d);
498 other->meta.load_state = UNIT_MERGED;
499 other->meta.merged_into = u;
501 /* If there is still some data attached to the other node, we
502 * don't need it anymore, and can free it. */
503 if (other->meta.load_state != UNIT_STUB)
504 if (UNIT_VTABLE(other)->done)
505 UNIT_VTABLE(other)->done(other);
507 unit_add_to_dbus_queue(u);
508 unit_add_to_cleanup_queue(other);
513 int unit_merge_by_name(Unit *u, const char *name) {
521 if (unit_name_is_template(name)) {
522 if (!u->meta.instance)
525 if (!(s = unit_name_replace_instance(name, u->meta.instance)))
531 if (!(other = manager_get_unit(u->meta.manager, name)))
532 r = unit_add_name(u, name);
534 r = unit_merge(u, other);
540 Unit* unit_follow_merge(Unit *u) {
543 while (u->meta.load_state == UNIT_MERGED)
544 assert_se(u = u->meta.merged_into);
549 int unit_add_exec_dependencies(Unit *u, ExecContext *c) {
555 if (c->std_output != EXEC_OUTPUT_KMSG &&
556 c->std_output != EXEC_OUTPUT_SYSLOG &&
557 c->std_error != EXEC_OUTPUT_KMSG &&
558 c->std_error != EXEC_OUTPUT_SYSLOG)
561 /* If syslog or kernel logging is requested, make sure our own
562 * logging daemon is run first. */
564 if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0)
567 if (u->meta.manager->running_as == MANAGER_SYSTEM)
568 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0)
574 const char *unit_description(Unit *u) {
577 if (u->meta.description)
578 return u->meta.description;
583 void unit_dump(Unit *u, FILE *f, const char *prefix) {
591 timestamp1[FORMAT_TIMESTAMP_MAX],
592 timestamp2[FORMAT_TIMESTAMP_MAX],
593 timestamp3[FORMAT_TIMESTAMP_MAX],
594 timestamp4[FORMAT_TIMESTAMP_MAX],
595 timespan[FORMAT_TIMESPAN_MAX];
599 assert(u->meta.type >= 0);
603 p2 = strappend(prefix, "\t");
604 prefix2 = p2 ? p2 : prefix;
608 "%s\tDescription: %s\n"
610 "%s\tUnit Load State: %s\n"
611 "%s\tUnit Active State: %s\n"
612 "%s\tInactive Exit Timestamp: %s\n"
613 "%s\tActive Enter Timestamp: %s\n"
614 "%s\tActive Exit Timestamp: %s\n"
615 "%s\tInactive Enter Timestamp: %s\n"
616 "%s\tGC Check Good: %s\n"
617 "%s\tNeed Daemon Reload: %s\n",
619 prefix, unit_description(u),
620 prefix, strna(u->meta.instance),
621 prefix, unit_load_state_to_string(u->meta.load_state),
622 prefix, unit_active_state_to_string(unit_active_state(u)),
623 prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.inactive_exit_timestamp.realtime)),
624 prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)),
625 prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)),
626 prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)),
627 prefix, yes_no(unit_check_gc(u)),
628 prefix, yes_no(unit_need_daemon_reload(u)));
630 SET_FOREACH(t, u->meta.names, i)
631 fprintf(f, "%s\tName: %s\n", prefix, t);
633 if ((following = unit_following(u)))
634 fprintf(f, "%s\tFollowing: %s\n", prefix, following->meta.id);
636 if (u->meta.fragment_path)
637 fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path);
639 if (u->meta.job_timeout > 0)
640 fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->meta.job_timeout));
642 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) {
645 SET_FOREACH(other, u->meta.dependencies[d], i)
646 fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id);
649 if (u->meta.load_state == UNIT_LOADED) {
651 "%s\tRecursive Stop: %s\n"
652 "%s\tStopWhenUnneeded: %s\n"
653 "%s\tRefuseManualStart: %s\n"
654 "%s\tRefuseManualStop: %s\n"
655 "%s\tDefaultDependencies: %s\n"
656 "%s\tIgnoreDependencyFailure: %s\n",
657 prefix, yes_no(u->meta.recursive_stop),
658 prefix, yes_no(u->meta.stop_when_unneeded),
659 prefix, yes_no(u->meta.refuse_manual_start),
660 prefix, yes_no(u->meta.refuse_manual_stop),
661 prefix, yes_no(u->meta.default_dependencies),
662 prefix, yes_no(u->meta.ignore_dependency_failure));
664 LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings)
665 fprintf(f, "%s\tControlGroup: %s:%s\n",
666 prefix, b->controller, b->path);
668 if (UNIT_VTABLE(u)->dump)
669 UNIT_VTABLE(u)->dump(u, f, prefix2);
671 } else if (u->meta.load_state == UNIT_MERGED)
673 "%s\tMerged into: %s\n",
674 prefix, u->meta.merged_into->meta.id);
675 else if (u->meta.load_state == UNIT_ERROR)
676 fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->meta.load_error));
680 job_dump(u->meta.job, f, prefix2);
685 /* Common implementation for multiple backends */
686 int unit_load_fragment_and_dropin(Unit *u) {
691 /* Load a .service file */
692 if ((r = unit_load_fragment(u)) < 0)
695 if (u->meta.load_state == UNIT_STUB)
698 /* Load drop-in directory data */
699 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
705 /* Common implementation for multiple backends */
706 int unit_load_fragment_and_dropin_optional(Unit *u) {
711 /* Same as unit_load_fragment_and_dropin(), but whether
712 * something can be loaded or not doesn't matter. */
714 /* Load a .service file */
715 if ((r = unit_load_fragment(u)) < 0)
718 if (u->meta.load_state == UNIT_STUB)
719 u->meta.load_state = UNIT_LOADED;
721 /* Load drop-in directory data */
722 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
728 static int unit_add_one_default_dependency(Unit *u, Unit *target) {
732 if (target->meta.type != UNIT_TARGET)
735 /* Don't create loops */
736 if (set_get(target->meta.dependencies[UNIT_BEFORE], u))
739 return unit_add_dependency(target, UNIT_AFTER, u, true);
742 static int unit_add_default_dependencies(Unit *u) {
749 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
750 if ((r = unit_add_one_default_dependency(u, other)) < 0)
753 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
754 if ((r = unit_add_one_default_dependency(u, other)) < 0)
757 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i)
758 if ((r = unit_add_one_default_dependency(u, other)) < 0)
764 int unit_load(Unit *u) {
769 if (u->meta.in_load_queue) {
770 LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta);
771 u->meta.in_load_queue = false;
774 if (u->meta.type == _UNIT_TYPE_INVALID)
777 if (u->meta.load_state != UNIT_STUB)
780 if (UNIT_VTABLE(u)->load)
781 if ((r = UNIT_VTABLE(u)->load(u)) < 0)
784 if (u->meta.load_state == UNIT_STUB) {
789 if (u->meta.load_state == UNIT_LOADED &&
790 u->meta.default_dependencies)
791 if ((r = unit_add_default_dependencies(u)) < 0)
794 assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into);
796 unit_add_to_dbus_queue(unit_follow_merge(u));
797 unit_add_to_gc_queue(u);
802 u->meta.load_state = UNIT_ERROR;
803 u->meta.load_error = r;
804 unit_add_to_dbus_queue(u);
806 log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r));
812 * -EBADR: This unit type does not support starting.
813 * -EALREADY: Unit is already started.
814 * -EAGAIN: An operation is already in progress. Retry later.
815 * -ECANCELED: Too many requests for now.
817 int unit_start(Unit *u) {
818 UnitActiveState state;
822 if (u->meta.load_state != UNIT_LOADED)
825 /* If this is already (being) started, then this will
826 * succeed. Note that this will even succeed if this unit is
827 * not startable by the user. This is relied on to detect when
828 * we need to wait for units and when waiting is finished. */
829 state = unit_active_state(u);
830 if (UNIT_IS_ACTIVE_OR_RELOADING(state))
833 /* If it is stopped, but we cannot start it, then fail */
834 if (!UNIT_VTABLE(u)->start)
837 /* We don't suppress calls to ->start() here when we are
838 * already starting, to allow this request to be used as a
839 * "hurry up" call, for example when the unit is in some "auto
840 * restart" state where it waits for a holdoff timer to elapse
841 * before it will start again. */
843 unit_add_to_dbus_queue(u);
845 unit_status_printf(u, "Starting %s...\n", unit_description(u));
847 return UNIT_VTABLE(u)->start(u);
850 bool unit_can_start(Unit *u) {
853 return !!UNIT_VTABLE(u)->start;
856 bool unit_can_isolate(Unit *u) {
859 return unit_can_start(u) &&
860 u->meta.allow_isolate;
864 * -EBADR: This unit type does not support stopping.
865 * -EALREADY: Unit is already stopped.
866 * -EAGAIN: An operation is already in progress. Retry later.
868 int unit_stop(Unit *u) {
869 UnitActiveState state;
873 state = unit_active_state(u);
874 if (UNIT_IS_INACTIVE_OR_FAILED(state))
877 if (!UNIT_VTABLE(u)->stop)
880 unit_add_to_dbus_queue(u);
882 unit_status_printf(u, "Stopping %s...\n", unit_description(u));
884 return UNIT_VTABLE(u)->stop(u);
888 * -EBADR: This unit type does not support reloading.
889 * -ENOEXEC: Unit is not started.
890 * -EAGAIN: An operation is already in progress. Retry later.
892 int unit_reload(Unit *u) {
893 UnitActiveState state;
897 if (u->meta.load_state != UNIT_LOADED)
900 if (!unit_can_reload(u))
903 state = unit_active_state(u);
904 if (state == UNIT_RELOADING)
907 if (state != UNIT_ACTIVE)
910 unit_add_to_dbus_queue(u);
911 return UNIT_VTABLE(u)->reload(u);
914 bool unit_can_reload(Unit *u) {
917 if (!UNIT_VTABLE(u)->reload)
920 if (!UNIT_VTABLE(u)->can_reload)
923 return UNIT_VTABLE(u)->can_reload(u);
926 static void unit_check_uneeded(Unit *u) {
932 /* If this service shall be shut down when unneeded then do
935 if (!u->meta.stop_when_unneeded)
938 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
941 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
942 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
945 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
946 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
949 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i)
950 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
953 log_info("Service %s is not needed anymore. Stopping.", u->meta.id);
955 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
956 manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL);
959 static void retroactively_start_dependencies(Unit *u) {
964 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)));
966 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
967 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
968 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
970 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
971 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
972 manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
974 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i)
975 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
976 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
978 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i)
979 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
980 manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
982 SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i)
983 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
984 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
986 SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTED_BY], i)
987 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
988 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
991 static void retroactively_stop_dependencies(Unit *u) {
996 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)));
998 if (u->meta.recursive_stop) {
999 /* Pull down units need us recursively if enabled */
1000 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
1001 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1002 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
1005 /* Garbage collect services that might not be needed anymore, if enabled */
1006 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
1007 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1008 unit_check_uneeded(other);
1009 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1010 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1011 unit_check_uneeded(other);
1012 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i)
1013 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1014 unit_check_uneeded(other);
1015 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i)
1016 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1017 unit_check_uneeded(other);
1018 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
1019 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1020 unit_check_uneeded(other);
1023 void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
1028 assert(os < _UNIT_ACTIVE_STATE_MAX);
1029 assert(ns < _UNIT_ACTIVE_STATE_MAX);
1031 /* Note that this is called for all low-level state changes,
1032 * even if they might map to the same high-level
1033 * UnitActiveState! That means that ns == os is OK an expected
1034 * behaviour here. For example: if a mount point is remounted
1035 * this function will be called too! */
1037 dual_timestamp_get(&ts);
1039 if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns))
1040 u->meta.inactive_exit_timestamp = ts;
1041 else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns))
1042 u->meta.inactive_enter_timestamp = ts;
1044 if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns))
1045 u->meta.active_enter_timestamp = ts;
1046 else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns))
1047 u->meta.active_exit_timestamp = ts;
1049 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1050 cgroup_bonding_trim_list(u->meta.cgroup_bondings, true);
1052 timer_unit_notify(u, ns);
1053 path_unit_notify(u, ns);
1058 if (u->meta.job->state == JOB_WAITING)
1060 /* So we reached a different state for this
1061 * job. Let's see if we can run it now if it
1062 * failed previously due to EAGAIN. */
1063 job_add_to_run_queue(u->meta.job);
1065 /* Let's check whether this state change constitutes a
1066 * finished job, or maybe cotradicts a running job and
1067 * hence needs to invalidate jobs. */
1069 switch (u->meta.job->type) {
1072 case JOB_VERIFY_ACTIVE:
1074 if (UNIT_IS_ACTIVE_OR_RELOADING(ns))
1075 job_finish_and_invalidate(u->meta.job, true);
1076 else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) {
1079 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1080 job_finish_and_invalidate(u->meta.job, ns != UNIT_FAILED);
1086 case JOB_RELOAD_OR_START:
1088 if (u->meta.job->state == JOB_RUNNING) {
1089 if (ns == UNIT_ACTIVE)
1090 job_finish_and_invalidate(u->meta.job, true);
1091 else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) {
1094 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1095 job_finish_and_invalidate(u->meta.job, ns != UNIT_FAILED);
1103 case JOB_TRY_RESTART:
1105 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1106 job_finish_and_invalidate(u->meta.job, true);
1107 else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) {
1109 job_finish_and_invalidate(u->meta.job, false);
1115 assert_not_reached("Job type unknown");
1121 /* If this state change happened without being requested by a
1122 * job, then let's retroactively start or stop
1123 * dependencies. We skip that step when deserializing, since
1124 * we don't want to create any additional jobs just because
1125 * something is already activated. */
1127 if (unexpected && u->meta.manager->n_deserializing <= 0) {
1128 if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns))
1129 retroactively_start_dependencies(u);
1130 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
1131 retroactively_stop_dependencies(u);
1134 if (ns != os && ns == UNIT_FAILED) {
1138 SET_FOREACH(other, u->meta.dependencies[UNIT_ON_FAILURE], i)
1139 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1141 log_notice("Unit %s entered failed state.", u->meta.id);
1144 /* Some names are special */
1145 if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
1146 if (unit_has_name(u, SPECIAL_DBUS_SERVICE))
1147 /* The bus just might have become available,
1148 * hence try to connect to it, if we aren't
1150 bus_init(u->meta.manager);
1152 if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE))
1153 /* The syslog daemon just might have become
1154 * available, hence try to connect to it, if
1155 * we aren't yet connected. */
1158 if (u->meta.type == UNIT_SERVICE &&
1159 !UNIT_IS_ACTIVE_OR_RELOADING(os)) {
1160 /* Write audit record if we have just finished starting up */
1161 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, 1);
1162 u->meta.in_audit = true;
1167 if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE))
1168 /* The syslog daemon might just have
1169 * terminated, hence try to disconnect from
1173 /* We don't care about D-Bus here, since we'll get an
1174 * asynchronous notification for it anyway. */
1176 if (u->meta.type == UNIT_SERVICE &&
1177 UNIT_IS_INACTIVE_OR_FAILED(ns) &&
1178 !UNIT_IS_INACTIVE_OR_FAILED(os)) {
1180 /* Hmm, if there was no start record written
1181 * write it now, so that we always have a nice
1183 if (!u->meta.in_audit) {
1184 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE);
1186 if (ns == UNIT_INACTIVE)
1187 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, true);
1189 /* Write audit record if we have just finished shutting down */
1190 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE);
1192 u->meta.in_audit = false;
1196 /* Maybe we finished startup and are now ready for being
1197 * stopped because unneeded? */
1198 unit_check_uneeded(u);
1200 unit_add_to_dbus_queue(u);
1201 unit_add_to_gc_queue(u);
1204 int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) {
1205 struct epoll_event ev;
1210 assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u));
1216 if (epoll_ctl(u->meta.manager->epoll_fd,
1217 w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD,
1229 void unit_unwatch_fd(Unit *u, Watch *w) {
1233 if (w->type == WATCH_INVALID)
1236 assert(w->type == WATCH_FD);
1237 assert(w->data.unit == u);
1238 assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
1241 w->type = WATCH_INVALID;
1242 w->data.unit = NULL;
1245 int unit_watch_pid(Unit *u, pid_t pid) {
1249 /* Watch a specific PID. We only support one unit watching
1250 * each PID for now. */
1252 return hashmap_put(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u);
1255 void unit_unwatch_pid(Unit *u, pid_t pid) {
1259 hashmap_remove_value(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u);
1262 int unit_watch_timer(Unit *u, usec_t delay, Watch *w) {
1263 struct itimerspec its;
1269 assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u));
1271 /* This will try to reuse the old timer if there is one */
1273 if (w->type == WATCH_UNIT_TIMER) {
1274 assert(w->data.unit == u);
1279 } else if (w->type == WATCH_INVALID) {
1282 if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
1285 assert_not_reached("Invalid watch type");
1290 /* Set absolute time in the past, but not 0, since we
1291 * don't want to disarm the timer */
1292 its.it_value.tv_sec = 0;
1293 its.it_value.tv_nsec = 1;
1295 flags = TFD_TIMER_ABSTIME;
1297 timespec_store(&its.it_value, delay);
1301 /* This will also flush the elapse counter */
1302 if (timerfd_settime(fd, flags, &its, NULL) < 0)
1305 if (w->type == WATCH_INVALID) {
1306 struct epoll_event ev;
1310 ev.events = EPOLLIN;
1312 if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0)
1316 w->type = WATCH_UNIT_TIMER;
1324 close_nointr_nofail(fd);
1329 void unit_unwatch_timer(Unit *u, Watch *w) {
1333 if (w->type == WATCH_INVALID)
1336 assert(w->type == WATCH_UNIT_TIMER);
1337 assert(w->data.unit == u);
1340 assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
1341 close_nointr_nofail(w->fd);
1344 w->type = WATCH_INVALID;
1345 w->data.unit = NULL;
1348 bool unit_job_is_applicable(Unit *u, JobType j) {
1350 assert(j >= 0 && j < _JOB_TYPE_MAX);
1354 case JOB_VERIFY_ACTIVE:
1360 case JOB_TRY_RESTART:
1361 return unit_can_start(u);
1364 return unit_can_reload(u);
1366 case JOB_RELOAD_OR_START:
1367 return unit_can_reload(u) && unit_can_start(u);
1370 assert_not_reached("Invalid job type");
1374 int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) {
1376 static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = {
1377 [UNIT_REQUIRES] = UNIT_REQUIRED_BY,
1378 [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
1379 [UNIT_WANTS] = UNIT_WANTED_BY,
1380 [UNIT_REQUISITE] = UNIT_REQUIRED_BY,
1381 [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
1382 [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID,
1383 [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID,
1384 [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID,
1385 [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY,
1386 [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS,
1387 [UNIT_BEFORE] = UNIT_AFTER,
1388 [UNIT_AFTER] = UNIT_BEFORE,
1389 [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID,
1390 [UNIT_REFERENCES] = UNIT_REFERENCED_BY,
1391 [UNIT_REFERENCED_BY] = UNIT_REFERENCES
1393 int r, q = 0, v = 0, w = 0;
1396 assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX);
1399 /* We won't allow dependencies on ourselves. We will not
1400 * consider them an error however. */
1404 if (UNIT_VTABLE(u)->no_requires &&
1405 (d == UNIT_REQUIRES ||
1406 d == UNIT_REQUIRES_OVERRIDABLE ||
1407 d == UNIT_REQUISITE ||
1408 d == UNIT_REQUISITE_OVERRIDABLE)) {
1412 if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0)
1415 if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
1416 if ((r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0)
1420 if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 ||
1421 (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0)
1424 if ((q = set_put(u->meta.dependencies[d], other)) < 0)
1427 if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
1428 if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) {
1433 if (add_reference) {
1434 if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) {
1439 if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0)
1443 unit_add_to_dbus_queue(u);
1448 set_remove(u->meta.dependencies[d], other);
1451 set_remove(other->meta.dependencies[inverse_table[d]], u);
1454 set_remove(u->meta.dependencies[UNIT_REFERENCES], other);
1459 int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) {
1464 if ((r = unit_add_dependency(u, d, other, add_reference)) < 0)
1467 if ((r = unit_add_dependency(u, e, other, add_reference)) < 0)
1473 static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) {
1477 assert(name || path);
1480 name = file_name_from_path(path);
1482 if (!unit_name_is_template(name)) {
1487 if (u->meta.instance)
1488 s = unit_name_replace_instance(name, u->meta.instance);
1492 if (!(i = unit_name_to_prefix(u->meta.id)))
1495 s = unit_name_replace_instance(name, i);
1506 int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
1512 assert(name || path);
1514 if (!(name = resolve_template(u, name, path, &s)))
1517 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1520 r = unit_add_dependency(u, d, other, add_reference);
1527 int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
1533 assert(name || path);
1535 if (!(name = resolve_template(u, name, path, &s)))
1538 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1541 r = unit_add_two_dependencies(u, d, e, other, add_reference);
1548 int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
1554 assert(name || path);
1556 if (!(name = resolve_template(u, name, path, &s)))
1559 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1562 r = unit_add_dependency(other, d, u, add_reference);
1569 int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
1575 assert(name || path);
1577 if (!(name = resolve_template(u, name, path, &s)))
1580 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1583 if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0)
1591 int set_unit_path(const char *p) {
1595 /* This is mostly for debug purposes */
1597 if (path_is_absolute(p)) {
1598 if (!(c = strdup(p)))
1601 if (!(cwd = get_current_dir_name()))
1604 r = asprintf(&c, "%s/%s", cwd, p);
1611 if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) {
1620 char *unit_dbus_path(Unit *u) {
1628 if (!(e = bus_path_escape(u->meta.id)))
1631 p = strappend("/org/freedesktop/systemd1/unit/", e);
1637 int unit_add_cgroup(Unit *u, CGroupBonding *b) {
1647 if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER)))
1650 /* Ensure this hasn't been added yet */
1653 l = hashmap_get(u->meta.manager->cgroup_bondings, b->path);
1654 LIST_PREPEND(CGroupBonding, by_path, l, b);
1656 if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) {
1657 LIST_REMOVE(CGroupBonding, by_path, l, b);
1661 LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b);
1667 static char *default_cgroup_path(Unit *u) {
1673 if (u->meta.instance) {
1676 if (!(t = unit_name_template(u->meta.id)))
1679 r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance);
1682 r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id);
1684 return r < 0 ? NULL : p;
1687 int unit_add_cgroup_from_text(Unit *u, const char *name) {
1688 char *controller = NULL, *path = NULL;
1689 CGroupBonding *b = NULL;
1695 if ((r = cg_split_spec(name, &controller, &path)) < 0)
1699 path = default_cgroup_path(u);
1702 controller = strdup(SYSTEMD_CGROUP_CONTROLLER);
1704 if (!path || !controller) {
1711 if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) {
1716 if (!(b = new0(CGroupBonding, 1))) {
1721 b->controller = controller;
1724 b->clean_up = false;
1726 if ((r = unit_add_cgroup(u, b)) < 0)
1739 int unit_add_default_cgroup(Unit *u) {
1745 /* Adds in the default cgroup data, if it wasn't specified yet */
1747 if (unit_get_default_cgroup(u))
1750 if (!(b = new0(CGroupBonding, 1)))
1753 if (!(b->path = default_cgroup_path(u)))
1759 if ((r = unit_add_cgroup(u, b)) < 0)
1766 free(b->controller);
1772 CGroupBonding* unit_get_default_cgroup(Unit *u) {
1775 return cgroup_bonding_find_list(u->meta.cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER);
1778 int unit_load_related_unit(Unit *u, const char *type, Unit **_found) {
1786 if (!(t = unit_name_change_suffix(u->meta.id, type)))
1789 assert(!unit_has_name(u, t));
1791 r = manager_load_unit(u->meta.manager, t, NULL, NULL, _found);
1794 assert(r < 0 || *_found != u);
1799 int unit_get_related_unit(Unit *u, const char *type, Unit **_found) {
1807 if (!(t = unit_name_change_suffix(u->meta.id, type)))
1810 assert(!unit_has_name(u, t));
1812 found = manager_get_unit(u->meta.manager, t);
1822 static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) {
1826 return unit_name_to_prefix_and_instance(u->meta.id);
1829 static char *specifier_prefix(char specifier, void *data, void *userdata) {
1833 return unit_name_to_prefix(u->meta.id);
1836 static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) {
1842 if (!(p = unit_name_to_prefix(u->meta.id)))
1845 r = unit_name_unescape(p);
1851 static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) {
1855 if (u->meta.instance)
1856 return unit_name_unescape(u->meta.instance);
1861 char *unit_name_printf(Unit *u, const char* format) {
1864 * This will use the passed string as format string and
1865 * replace the following specifiers:
1867 * %n: the full id of the unit (foo@bar.waldo)
1868 * %N: the id of the unit without the suffix (foo@bar)
1869 * %p: the prefix (foo)
1870 * %i: the instance (bar)
1873 const Specifier table[] = {
1874 { 'n', specifier_string, u->meta.id },
1875 { 'N', specifier_prefix_and_instance, NULL },
1876 { 'p', specifier_prefix, NULL },
1877 { 'i', specifier_string, u->meta.instance },
1884 return specifier_printf(format, table, u);
1887 char *unit_full_printf(Unit *u, const char *format) {
1889 /* This is similar to unit_name_printf() but also supports
1892 const Specifier table[] = {
1893 { 'n', specifier_string, u->meta.id },
1894 { 'N', specifier_prefix_and_instance, NULL },
1895 { 'p', specifier_prefix, NULL },
1896 { 'P', specifier_prefix_unescaped, NULL },
1897 { 'i', specifier_string, u->meta.instance },
1898 { 'I', specifier_instance_unescaped, NULL },
1905 return specifier_printf(format, table, u);
1908 char **unit_full_printf_strv(Unit *u, char **l) {
1912 /* Applies unit_full_printf to every entry in l */
1917 if (!(r = new(char*, n+1)))
1920 for (i = l, j = r; *i; i++, j++)
1921 if (!(*j = unit_full_printf(u, *i)))
1937 int unit_watch_bus_name(Unit *u, const char *name) {
1941 /* Watch a specific name on the bus. We only support one unit
1942 * watching each name for now. */
1944 return hashmap_put(u->meta.manager->watch_bus, name, u);
1947 void unit_unwatch_bus_name(Unit *u, const char *name) {
1951 hashmap_remove_value(u->meta.manager->watch_bus, name, u);
1954 bool unit_can_serialize(Unit *u) {
1957 return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item;
1960 int unit_serialize(Unit *u, FILE *f, FDSet *fds) {
1967 if (!unit_can_serialize(u))
1970 if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0)
1974 unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type));
1981 void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) {
1992 va_start(ap, format);
1993 vfprintf(f, format, ap);
1999 void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) {
2005 fprintf(f, "%s=%s\n", key, value);
2008 int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
2015 if (!unit_can_serialize(u))
2019 char line[1024], *l, *v;
2022 if (!fgets(line, sizeof(line), f)) {
2035 k = strcspn(l, "=");
2043 if (streq(l, "job")) {
2046 if ((type = job_type_from_string(v)) < 0)
2047 log_debug("Failed to parse job type value %s", v);
2049 u->meta.deserialized_job = type;
2054 if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0)
2059 int unit_add_node_link(Unit *u, const char *what, bool wants) {
2069 /* Adds in links to the device node that this unit is based on */
2071 if (!is_device_path(what))
2074 if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
2077 r = manager_load_unit(u->meta.manager, e, NULL, NULL, &device);
2083 if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, device, true)) < 0)
2087 if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0)
2093 int unit_coldplug(Unit *u) {
2098 if (UNIT_VTABLE(u)->coldplug)
2099 if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0)
2102 if (u->meta.deserialized_job >= 0) {
2103 if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_FAIL, false, NULL, NULL)) < 0)
2106 u->meta.deserialized_job = _JOB_TYPE_INVALID;
2112 void unit_status_printf(Unit *u, const char *format, ...) {
2118 if (!UNIT_VTABLE(u)->show_status)
2121 if (u->meta.manager->running_as != MANAGER_SYSTEM)
2124 if (!u->meta.manager->show_status)
2127 if (!manager_is_booting_or_shutting_down(u->meta.manager))
2130 va_start(ap, format);
2131 status_vprintf(format, ap);
2135 bool unit_need_daemon_reload(Unit *u) {
2140 if (!u->meta.fragment_path)
2144 if (stat(u->meta.fragment_path, &st) < 0)
2145 /* What, cannot access this anymore? */
2149 u->meta.fragment_mtime &&
2150 timespec_load(&st.st_mtim) != u->meta.fragment_mtime;
2153 void unit_reset_failed(Unit *u) {
2156 if (UNIT_VTABLE(u)->reset_failed)
2157 UNIT_VTABLE(u)->reset_failed(u);
2160 Unit *unit_following(Unit *u) {
2163 if (UNIT_VTABLE(u)->following)
2164 return UNIT_VTABLE(u)->following(u);
2169 bool unit_pending_inactive(Unit *u) {
2172 /* Returns true if the unit is inactive or going down */
2174 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)))
2177 if (u->meta.job && u->meta.job->type == JOB_STOP)
2183 static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
2184 [UNIT_STUB] = "stub",
2185 [UNIT_LOADED] = "loaded",
2186 [UNIT_ERROR] = "error",
2187 [UNIT_MERGED] = "merged"
2190 DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState);
2192 static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = {
2193 [UNIT_ACTIVE] = "active",
2194 [UNIT_RELOADING] = "reloading",
2195 [UNIT_INACTIVE] = "inactive",
2196 [UNIT_FAILED] = "failed",
2197 [UNIT_ACTIVATING] = "activating",
2198 [UNIT_DEACTIVATING] = "deactivating"
2201 DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState);
2203 static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = {
2204 [UNIT_REQUIRES] = "Requires",
2205 [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable",
2206 [UNIT_WANTS] = "Wants",
2207 [UNIT_REQUISITE] = "Requisite",
2208 [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable",
2209 [UNIT_REQUIRED_BY] = "RequiredBy",
2210 [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable",
2211 [UNIT_WANTED_BY] = "WantedBy",
2212 [UNIT_CONFLICTS] = "Conflicts",
2213 [UNIT_CONFLICTED_BY] = "ConflictedBy",
2214 [UNIT_BEFORE] = "Before",
2215 [UNIT_AFTER] = "After",
2216 [UNIT_REFERENCES] = "References",
2217 [UNIT_REFERENCED_BY] = "ReferencedBy",
2218 [UNIT_ON_FAILURE] = "OnFailure"
2221 DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency);
2223 static const char* const kill_mode_table[_KILL_MODE_MAX] = {
2224 [KILL_CONTROL_GROUP] = "control-group",
2225 [KILL_PROCESS_GROUP] = "process-group",
2226 [KILL_PROCESS] = "process",
2227 [KILL_NONE] = "none"
2230 DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode);