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 /* Fix backwards pointers */
444 SET_FOREACH(back, other->meta.dependencies[d], i) {
447 for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++)
448 if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) {
451 set_remove(back->meta.dependencies[k], other);
453 assert(r == -ENOENT);
457 complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]);
459 set_free(other->meta.dependencies[d]);
460 other->meta.dependencies[d] = NULL;
463 int unit_merge(Unit *u, Unit *other) {
468 assert(u->meta.manager == other->meta.manager);
469 assert(u->meta.type != _UNIT_TYPE_INVALID);
471 other = unit_follow_merge(other);
476 if (u->meta.type != other->meta.type)
479 if (!u->meta.instance != !other->meta.instance)
482 if (other->meta.load_state != UNIT_STUB &&
483 other->meta.load_state != UNIT_ERROR)
489 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other)))
493 merge_names(u, other);
495 /* Merge dependencies */
496 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
497 merge_dependencies(u, other, d);
499 other->meta.load_state = UNIT_MERGED;
500 other->meta.merged_into = u;
502 /* If there is still some data attached to the other node, we
503 * don't need it anymore, and can free it. */
504 if (other->meta.load_state != UNIT_STUB)
505 if (UNIT_VTABLE(other)->done)
506 UNIT_VTABLE(other)->done(other);
508 unit_add_to_dbus_queue(u);
509 unit_add_to_cleanup_queue(other);
514 int unit_merge_by_name(Unit *u, const char *name) {
522 if (unit_name_is_template(name)) {
523 if (!u->meta.instance)
526 if (!(s = unit_name_replace_instance(name, u->meta.instance)))
532 if (!(other = manager_get_unit(u->meta.manager, name)))
533 r = unit_add_name(u, name);
535 r = unit_merge(u, other);
541 Unit* unit_follow_merge(Unit *u) {
544 while (u->meta.load_state == UNIT_MERGED)
545 assert_se(u = u->meta.merged_into);
550 int unit_add_exec_dependencies(Unit *u, ExecContext *c) {
556 if (c->std_output != EXEC_OUTPUT_KMSG &&
557 c->std_output != EXEC_OUTPUT_SYSLOG &&
558 c->std_error != EXEC_OUTPUT_KMSG &&
559 c->std_error != EXEC_OUTPUT_SYSLOG)
562 /* If syslog or kernel logging is requested, make sure our own
563 * logging daemon is run first. */
565 if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0)
568 if (u->meta.manager->running_as == MANAGER_SYSTEM)
569 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0)
575 const char *unit_description(Unit *u) {
578 if (u->meta.description)
579 return u->meta.description;
584 void unit_dump(Unit *u, FILE *f, const char *prefix) {
592 timestamp1[FORMAT_TIMESTAMP_MAX],
593 timestamp2[FORMAT_TIMESTAMP_MAX],
594 timestamp3[FORMAT_TIMESTAMP_MAX],
595 timestamp4[FORMAT_TIMESTAMP_MAX],
596 timespan[FORMAT_TIMESPAN_MAX];
600 assert(u->meta.type >= 0);
604 p2 = strappend(prefix, "\t");
605 prefix2 = p2 ? p2 : prefix;
609 "%s\tDescription: %s\n"
611 "%s\tUnit Load State: %s\n"
612 "%s\tUnit Active State: %s\n"
613 "%s\tInactive Exit Timestamp: %s\n"
614 "%s\tActive Enter Timestamp: %s\n"
615 "%s\tActive Exit Timestamp: %s\n"
616 "%s\tInactive Enter Timestamp: %s\n"
617 "%s\tGC Check Good: %s\n"
618 "%s\tNeed Daemon Reload: %s\n",
620 prefix, unit_description(u),
621 prefix, strna(u->meta.instance),
622 prefix, unit_load_state_to_string(u->meta.load_state),
623 prefix, unit_active_state_to_string(unit_active_state(u)),
624 prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.inactive_exit_timestamp.realtime)),
625 prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)),
626 prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)),
627 prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)),
628 prefix, yes_no(unit_check_gc(u)),
629 prefix, yes_no(unit_need_daemon_reload(u)));
631 SET_FOREACH(t, u->meta.names, i)
632 fprintf(f, "%s\tName: %s\n", prefix, t);
634 if ((following = unit_following(u)))
635 fprintf(f, "%s\tFollowing: %s\n", prefix, following->meta.id);
637 if (u->meta.fragment_path)
638 fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path);
640 if (u->meta.job_timeout > 0)
641 fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->meta.job_timeout));
643 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) {
646 SET_FOREACH(other, u->meta.dependencies[d], i)
647 fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id);
650 if (u->meta.load_state == UNIT_LOADED) {
652 "%s\tRecursive Stop: %s\n"
653 "%s\tStopWhenUnneeded: %s\n"
654 "%s\tRefuseManualStart: %s\n"
655 "%s\tRefuseManualStop: %s\n"
656 "%s\tDefaultDependencies: %s\n"
657 "%s\tIgnoreDependencyFailure: %s\n",
658 prefix, yes_no(u->meta.recursive_stop),
659 prefix, yes_no(u->meta.stop_when_unneeded),
660 prefix, yes_no(u->meta.refuse_manual_start),
661 prefix, yes_no(u->meta.refuse_manual_stop),
662 prefix, yes_no(u->meta.default_dependencies),
663 prefix, yes_no(u->meta.ignore_dependency_failure));
665 LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings)
666 fprintf(f, "%s\tControlGroup: %s:%s\n",
667 prefix, b->controller, b->path);
669 if (UNIT_VTABLE(u)->dump)
670 UNIT_VTABLE(u)->dump(u, f, prefix2);
672 } else if (u->meta.load_state == UNIT_MERGED)
674 "%s\tMerged into: %s\n",
675 prefix, u->meta.merged_into->meta.id);
676 else if (u->meta.load_state == UNIT_ERROR)
677 fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->meta.load_error));
681 job_dump(u->meta.job, f, prefix2);
686 /* Common implementation for multiple backends */
687 int unit_load_fragment_and_dropin(Unit *u) {
692 /* Load a .service file */
693 if ((r = unit_load_fragment(u)) < 0)
696 if (u->meta.load_state == UNIT_STUB)
699 /* Load drop-in directory data */
700 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
706 /* Common implementation for multiple backends */
707 int unit_load_fragment_and_dropin_optional(Unit *u) {
712 /* Same as unit_load_fragment_and_dropin(), but whether
713 * something can be loaded or not doesn't matter. */
715 /* Load a .service file */
716 if ((r = unit_load_fragment(u)) < 0)
719 if (u->meta.load_state == UNIT_STUB)
720 u->meta.load_state = UNIT_LOADED;
722 /* Load drop-in directory data */
723 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
729 static int unit_add_one_default_dependency(Unit *u, Unit *target) {
733 if (target->meta.type != UNIT_TARGET)
736 /* Don't create loops */
737 if (set_get(target->meta.dependencies[UNIT_BEFORE], u))
740 return unit_add_dependency(target, UNIT_AFTER, u, true);
743 static int unit_add_default_dependencies(Unit *u) {
750 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
751 if ((r = unit_add_one_default_dependency(u, other)) < 0)
754 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
755 if ((r = unit_add_one_default_dependency(u, other)) < 0)
758 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i)
759 if ((r = unit_add_one_default_dependency(u, other)) < 0)
765 int unit_load(Unit *u) {
770 if (u->meta.in_load_queue) {
771 LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta);
772 u->meta.in_load_queue = false;
775 if (u->meta.type == _UNIT_TYPE_INVALID)
778 if (u->meta.load_state != UNIT_STUB)
781 if (UNIT_VTABLE(u)->load)
782 if ((r = UNIT_VTABLE(u)->load(u)) < 0)
785 if (u->meta.load_state == UNIT_STUB) {
790 if (u->meta.load_state == UNIT_LOADED &&
791 u->meta.default_dependencies)
792 if ((r = unit_add_default_dependencies(u)) < 0)
795 assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into);
797 unit_add_to_dbus_queue(unit_follow_merge(u));
798 unit_add_to_gc_queue(u);
803 u->meta.load_state = UNIT_ERROR;
804 u->meta.load_error = r;
805 unit_add_to_dbus_queue(u);
807 log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r));
813 * -EBADR: This unit type does not support starting.
814 * -EALREADY: Unit is already started.
815 * -EAGAIN: An operation is already in progress. Retry later.
816 * -ECANCELED: Too many requests for now.
818 int unit_start(Unit *u) {
819 UnitActiveState state;
823 if (u->meta.load_state != UNIT_LOADED)
826 /* If this is already (being) started, then this will
827 * succeed. Note that this will even succeed if this unit is
828 * not startable by the user. This is relied on to detect when
829 * we need to wait for units and when waiting is finished. */
830 state = unit_active_state(u);
831 if (UNIT_IS_ACTIVE_OR_RELOADING(state))
834 /* If it is stopped, but we cannot start it, then fail */
835 if (!UNIT_VTABLE(u)->start)
838 /* We don't suppress calls to ->start() here when we are
839 * already starting, to allow this request to be used as a
840 * "hurry up" call, for example when the unit is in some "auto
841 * restart" state where it waits for a holdoff timer to elapse
842 * before it will start again. */
844 unit_add_to_dbus_queue(u);
846 unit_status_printf(u, "Starting %s...\n", unit_description(u));
848 return UNIT_VTABLE(u)->start(u);
851 bool unit_can_start(Unit *u) {
854 return !!UNIT_VTABLE(u)->start;
857 bool unit_can_isolate(Unit *u) {
860 return unit_can_start(u) &&
861 u->meta.allow_isolate;
865 * -EBADR: This unit type does not support stopping.
866 * -EALREADY: Unit is already stopped.
867 * -EAGAIN: An operation is already in progress. Retry later.
869 int unit_stop(Unit *u) {
870 UnitActiveState state;
874 state = unit_active_state(u);
875 if (UNIT_IS_INACTIVE_OR_FAILED(state))
878 if (!UNIT_VTABLE(u)->stop)
881 unit_add_to_dbus_queue(u);
883 unit_status_printf(u, "Stopping %s...\n", unit_description(u));
885 return UNIT_VTABLE(u)->stop(u);
889 * -EBADR: This unit type does not support reloading.
890 * -ENOEXEC: Unit is not started.
891 * -EAGAIN: An operation is already in progress. Retry later.
893 int unit_reload(Unit *u) {
894 UnitActiveState state;
898 if (u->meta.load_state != UNIT_LOADED)
901 if (!unit_can_reload(u))
904 state = unit_active_state(u);
905 if (state == UNIT_RELOADING)
908 if (state != UNIT_ACTIVE)
911 unit_add_to_dbus_queue(u);
912 return UNIT_VTABLE(u)->reload(u);
915 bool unit_can_reload(Unit *u) {
918 if (!UNIT_VTABLE(u)->reload)
921 if (!UNIT_VTABLE(u)->can_reload)
924 return UNIT_VTABLE(u)->can_reload(u);
927 static void unit_check_uneeded(Unit *u) {
933 /* If this service shall be shut down when unneeded then do
936 if (!u->meta.stop_when_unneeded)
939 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
942 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
943 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
946 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
947 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
950 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i)
951 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
954 log_info("Service %s is not needed anymore. Stopping.", u->meta.id);
956 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
957 manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL);
960 static void retroactively_start_dependencies(Unit *u) {
965 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)));
967 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
968 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
969 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
971 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
972 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
973 manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
975 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i)
976 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
977 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
979 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i)
980 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
981 manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
983 SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i)
984 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
985 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
987 SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTED_BY], i)
988 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
989 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
992 static void retroactively_stop_dependencies(Unit *u) {
997 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)));
999 if (u->meta.recursive_stop) {
1000 /* Pull down units need us recursively if enabled */
1001 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
1002 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1003 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
1006 /* Garbage collect services that might not be needed anymore, if enabled */
1007 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
1008 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1009 unit_check_uneeded(other);
1010 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1011 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1012 unit_check_uneeded(other);
1013 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i)
1014 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1015 unit_check_uneeded(other);
1016 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i)
1017 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1018 unit_check_uneeded(other);
1019 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
1020 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1021 unit_check_uneeded(other);
1024 void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
1029 assert(os < _UNIT_ACTIVE_STATE_MAX);
1030 assert(ns < _UNIT_ACTIVE_STATE_MAX);
1032 /* Note that this is called for all low-level state changes,
1033 * even if they might map to the same high-level
1034 * UnitActiveState! That means that ns == os is OK an expected
1035 * behaviour here. For example: if a mount point is remounted
1036 * this function will be called too! */
1038 dual_timestamp_get(&ts);
1040 if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns))
1041 u->meta.inactive_exit_timestamp = ts;
1042 else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns))
1043 u->meta.inactive_enter_timestamp = ts;
1045 if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns))
1046 u->meta.active_enter_timestamp = ts;
1047 else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns))
1048 u->meta.active_exit_timestamp = ts;
1050 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1051 cgroup_bonding_trim_list(u->meta.cgroup_bondings, true);
1053 timer_unit_notify(u, ns);
1054 path_unit_notify(u, ns);
1059 if (u->meta.job->state == JOB_WAITING)
1061 /* So we reached a different state for this
1062 * job. Let's see if we can run it now if it
1063 * failed previously due to EAGAIN. */
1064 job_add_to_run_queue(u->meta.job);
1066 /* Let's check whether this state change constitutes a
1067 * finished job, or maybe cotradicts a running job and
1068 * hence needs to invalidate jobs. */
1070 switch (u->meta.job->type) {
1073 case JOB_VERIFY_ACTIVE:
1075 if (UNIT_IS_ACTIVE_OR_RELOADING(ns))
1076 job_finish_and_invalidate(u->meta.job, true);
1077 else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) {
1080 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1081 job_finish_and_invalidate(u->meta.job, ns != UNIT_FAILED);
1087 case JOB_RELOAD_OR_START:
1089 if (u->meta.job->state == JOB_RUNNING) {
1090 if (ns == UNIT_ACTIVE)
1091 job_finish_and_invalidate(u->meta.job, true);
1092 else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) {
1095 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1096 job_finish_and_invalidate(u->meta.job, ns != UNIT_FAILED);
1104 case JOB_TRY_RESTART:
1106 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1107 job_finish_and_invalidate(u->meta.job, true);
1108 else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) {
1110 job_finish_and_invalidate(u->meta.job, false);
1116 assert_not_reached("Job type unknown");
1122 /* If this state change happened without being requested by a
1123 * job, then let's retroactively start or stop
1124 * dependencies. We skip that step when deserializing, since
1125 * we don't want to create any additional jobs just because
1126 * something is already activated. */
1128 if (unexpected && u->meta.manager->n_deserializing <= 0) {
1129 if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns))
1130 retroactively_start_dependencies(u);
1131 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
1132 retroactively_stop_dependencies(u);
1135 if (ns != os && ns == UNIT_FAILED) {
1139 SET_FOREACH(other, u->meta.dependencies[UNIT_ON_FAILURE], i)
1140 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1142 log_notice("Unit %s entered failed state.", u->meta.id);
1145 /* Some names are special */
1146 if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
1147 if (unit_has_name(u, SPECIAL_DBUS_SERVICE))
1148 /* The bus just might have become available,
1149 * hence try to connect to it, if we aren't
1151 bus_init(u->meta.manager);
1153 if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE))
1154 /* The syslog daemon just might have become
1155 * available, hence try to connect to it, if
1156 * we aren't yet connected. */
1159 if (u->meta.type == UNIT_SERVICE &&
1160 !UNIT_IS_ACTIVE_OR_RELOADING(os)) {
1161 /* Write audit record if we have just finished starting up */
1162 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, 1);
1163 u->meta.in_audit = true;
1168 if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE))
1169 /* The syslog daemon might just have
1170 * terminated, hence try to disconnect from
1174 /* We don't care about D-Bus here, since we'll get an
1175 * asynchronous notification for it anyway. */
1177 if (u->meta.type == UNIT_SERVICE &&
1178 UNIT_IS_INACTIVE_OR_FAILED(ns) &&
1179 !UNIT_IS_INACTIVE_OR_FAILED(os)) {
1181 /* Hmm, if there was no start record written
1182 * write it now, so that we always have a nice
1184 if (!u->meta.in_audit) {
1185 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE);
1187 if (ns == UNIT_INACTIVE)
1188 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, true);
1190 /* Write audit record if we have just finished shutting down */
1191 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE);
1193 u->meta.in_audit = false;
1197 /* Maybe we finished startup and are now ready for being
1198 * stopped because unneeded? */
1199 unit_check_uneeded(u);
1201 unit_add_to_dbus_queue(u);
1202 unit_add_to_gc_queue(u);
1205 int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) {
1206 struct epoll_event ev;
1211 assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u));
1217 if (epoll_ctl(u->meta.manager->epoll_fd,
1218 w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD,
1230 void unit_unwatch_fd(Unit *u, Watch *w) {
1234 if (w->type == WATCH_INVALID)
1237 assert(w->type == WATCH_FD);
1238 assert(w->data.unit == u);
1239 assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
1242 w->type = WATCH_INVALID;
1243 w->data.unit = NULL;
1246 int unit_watch_pid(Unit *u, pid_t pid) {
1250 /* Watch a specific PID. We only support one unit watching
1251 * each PID for now. */
1253 return hashmap_put(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u);
1256 void unit_unwatch_pid(Unit *u, pid_t pid) {
1260 hashmap_remove_value(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u);
1263 int unit_watch_timer(Unit *u, usec_t delay, Watch *w) {
1264 struct itimerspec its;
1270 assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u));
1272 /* This will try to reuse the old timer if there is one */
1274 if (w->type == WATCH_UNIT_TIMER) {
1275 assert(w->data.unit == u);
1280 } else if (w->type == WATCH_INVALID) {
1283 if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
1286 assert_not_reached("Invalid watch type");
1291 /* Set absolute time in the past, but not 0, since we
1292 * don't want to disarm the timer */
1293 its.it_value.tv_sec = 0;
1294 its.it_value.tv_nsec = 1;
1296 flags = TFD_TIMER_ABSTIME;
1298 timespec_store(&its.it_value, delay);
1302 /* This will also flush the elapse counter */
1303 if (timerfd_settime(fd, flags, &its, NULL) < 0)
1306 if (w->type == WATCH_INVALID) {
1307 struct epoll_event ev;
1311 ev.events = EPOLLIN;
1313 if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0)
1317 w->type = WATCH_UNIT_TIMER;
1325 close_nointr_nofail(fd);
1330 void unit_unwatch_timer(Unit *u, Watch *w) {
1334 if (w->type == WATCH_INVALID)
1337 assert(w->type == WATCH_UNIT_TIMER);
1338 assert(w->data.unit == u);
1341 assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
1342 close_nointr_nofail(w->fd);
1345 w->type = WATCH_INVALID;
1346 w->data.unit = NULL;
1349 bool unit_job_is_applicable(Unit *u, JobType j) {
1351 assert(j >= 0 && j < _JOB_TYPE_MAX);
1355 case JOB_VERIFY_ACTIVE:
1361 case JOB_TRY_RESTART:
1362 return unit_can_start(u);
1365 return unit_can_reload(u);
1367 case JOB_RELOAD_OR_START:
1368 return unit_can_reload(u) && unit_can_start(u);
1371 assert_not_reached("Invalid job type");
1375 int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) {
1377 static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = {
1378 [UNIT_REQUIRES] = UNIT_REQUIRED_BY,
1379 [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
1380 [UNIT_WANTS] = UNIT_WANTED_BY,
1381 [UNIT_REQUISITE] = UNIT_REQUIRED_BY,
1382 [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
1383 [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID,
1384 [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID,
1385 [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID,
1386 [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY,
1387 [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS,
1388 [UNIT_BEFORE] = UNIT_AFTER,
1389 [UNIT_AFTER] = UNIT_BEFORE,
1390 [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID,
1391 [UNIT_REFERENCES] = UNIT_REFERENCED_BY,
1392 [UNIT_REFERENCED_BY] = UNIT_REFERENCES
1394 int r, q = 0, v = 0, w = 0;
1397 assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX);
1400 /* We won't allow dependencies on ourselves. We will not
1401 * consider them an error however. */
1405 if (UNIT_VTABLE(u)->no_requires &&
1406 (d == UNIT_REQUIRES ||
1407 d == UNIT_REQUIRES_OVERRIDABLE ||
1408 d == UNIT_REQUISITE ||
1409 d == UNIT_REQUISITE_OVERRIDABLE)) {
1413 if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0)
1416 if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
1417 if ((r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0)
1421 if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 ||
1422 (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0)
1425 if ((q = set_put(u->meta.dependencies[d], other)) < 0)
1428 if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
1429 if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) {
1434 if (add_reference) {
1435 if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) {
1440 if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0)
1444 unit_add_to_dbus_queue(u);
1449 set_remove(u->meta.dependencies[d], other);
1452 set_remove(other->meta.dependencies[inverse_table[d]], u);
1455 set_remove(u->meta.dependencies[UNIT_REFERENCES], other);
1460 int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) {
1465 if ((r = unit_add_dependency(u, d, other, add_reference)) < 0)
1468 if ((r = unit_add_dependency(u, e, other, add_reference)) < 0)
1474 static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) {
1478 assert(name || path);
1481 name = file_name_from_path(path);
1483 if (!unit_name_is_template(name)) {
1488 if (u->meta.instance)
1489 s = unit_name_replace_instance(name, u->meta.instance);
1493 if (!(i = unit_name_to_prefix(u->meta.id)))
1496 s = unit_name_replace_instance(name, i);
1507 int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
1513 assert(name || path);
1515 if (!(name = resolve_template(u, name, path, &s)))
1518 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1521 r = unit_add_dependency(u, d, other, add_reference);
1528 int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
1534 assert(name || path);
1536 if (!(name = resolve_template(u, name, path, &s)))
1539 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1542 r = unit_add_two_dependencies(u, d, e, other, add_reference);
1549 int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
1555 assert(name || path);
1557 if (!(name = resolve_template(u, name, path, &s)))
1560 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1563 r = unit_add_dependency(other, d, u, add_reference);
1570 int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
1576 assert(name || path);
1578 if (!(name = resolve_template(u, name, path, &s)))
1581 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1584 if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0)
1592 int set_unit_path(const char *p) {
1596 /* This is mostly for debug purposes */
1598 if (path_is_absolute(p)) {
1599 if (!(c = strdup(p)))
1602 if (!(cwd = get_current_dir_name()))
1605 r = asprintf(&c, "%s/%s", cwd, p);
1612 if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) {
1621 char *unit_dbus_path(Unit *u) {
1629 if (!(e = bus_path_escape(u->meta.id)))
1632 p = strappend("/org/freedesktop/systemd1/unit/", e);
1638 int unit_add_cgroup(Unit *u, CGroupBonding *b) {
1648 if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER)))
1651 /* Ensure this hasn't been added yet */
1654 l = hashmap_get(u->meta.manager->cgroup_bondings, b->path);
1655 LIST_PREPEND(CGroupBonding, by_path, l, b);
1657 if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) {
1658 LIST_REMOVE(CGroupBonding, by_path, l, b);
1662 LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b);
1668 static char *default_cgroup_path(Unit *u) {
1674 if (u->meta.instance) {
1677 if (!(t = unit_name_template(u->meta.id)))
1680 r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance);
1683 r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id);
1685 return r < 0 ? NULL : p;
1688 int unit_add_cgroup_from_text(Unit *u, const char *name) {
1689 char *controller = NULL, *path = NULL;
1690 CGroupBonding *b = NULL;
1696 if ((r = cg_split_spec(name, &controller, &path)) < 0)
1700 path = default_cgroup_path(u);
1703 controller = strdup(SYSTEMD_CGROUP_CONTROLLER);
1705 if (!path || !controller) {
1712 if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) {
1717 if (!(b = new0(CGroupBonding, 1))) {
1722 b->controller = controller;
1725 b->clean_up = false;
1727 if ((r = unit_add_cgroup(u, b)) < 0)
1740 int unit_add_default_cgroup(Unit *u) {
1746 /* Adds in the default cgroup data, if it wasn't specified yet */
1748 if (unit_get_default_cgroup(u))
1751 if (!(b = new0(CGroupBonding, 1)))
1754 if (!(b->path = default_cgroup_path(u)))
1760 if ((r = unit_add_cgroup(u, b)) < 0)
1767 free(b->controller);
1773 CGroupBonding* unit_get_default_cgroup(Unit *u) {
1776 return cgroup_bonding_find_list(u->meta.cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER);
1779 int unit_load_related_unit(Unit *u, const char *type, Unit **_found) {
1787 if (!(t = unit_name_change_suffix(u->meta.id, type)))
1790 assert(!unit_has_name(u, t));
1792 r = manager_load_unit(u->meta.manager, t, NULL, NULL, _found);
1795 assert(r < 0 || *_found != u);
1800 int unit_get_related_unit(Unit *u, const char *type, Unit **_found) {
1808 if (!(t = unit_name_change_suffix(u->meta.id, type)))
1811 assert(!unit_has_name(u, t));
1813 found = manager_get_unit(u->meta.manager, t);
1823 static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) {
1827 return unit_name_to_prefix_and_instance(u->meta.id);
1830 static char *specifier_prefix(char specifier, void *data, void *userdata) {
1834 return unit_name_to_prefix(u->meta.id);
1837 static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) {
1843 if (!(p = unit_name_to_prefix(u->meta.id)))
1846 r = unit_name_unescape(p);
1852 static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) {
1856 if (u->meta.instance)
1857 return unit_name_unescape(u->meta.instance);
1862 char *unit_name_printf(Unit *u, const char* format) {
1865 * This will use the passed string as format string and
1866 * replace the following specifiers:
1868 * %n: the full id of the unit (foo@bar.waldo)
1869 * %N: the id of the unit without the suffix (foo@bar)
1870 * %p: the prefix (foo)
1871 * %i: the instance (bar)
1874 const Specifier table[] = {
1875 { 'n', specifier_string, u->meta.id },
1876 { 'N', specifier_prefix_and_instance, NULL },
1877 { 'p', specifier_prefix, NULL },
1878 { 'i', specifier_string, u->meta.instance },
1885 return specifier_printf(format, table, u);
1888 char *unit_full_printf(Unit *u, const char *format) {
1890 /* This is similar to unit_name_printf() but also supports
1893 const Specifier table[] = {
1894 { 'n', specifier_string, u->meta.id },
1895 { 'N', specifier_prefix_and_instance, NULL },
1896 { 'p', specifier_prefix, NULL },
1897 { 'P', specifier_prefix_unescaped, NULL },
1898 { 'i', specifier_string, u->meta.instance },
1899 { 'I', specifier_instance_unescaped, NULL },
1906 return specifier_printf(format, table, u);
1909 char **unit_full_printf_strv(Unit *u, char **l) {
1913 /* Applies unit_full_printf to every entry in l */
1918 if (!(r = new(char*, n+1)))
1921 for (i = l, j = r; *i; i++, j++)
1922 if (!(*j = unit_full_printf(u, *i)))
1938 int unit_watch_bus_name(Unit *u, const char *name) {
1942 /* Watch a specific name on the bus. We only support one unit
1943 * watching each name for now. */
1945 return hashmap_put(u->meta.manager->watch_bus, name, u);
1948 void unit_unwatch_bus_name(Unit *u, const char *name) {
1952 hashmap_remove_value(u->meta.manager->watch_bus, name, u);
1955 bool unit_can_serialize(Unit *u) {
1958 return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item;
1961 int unit_serialize(Unit *u, FILE *f, FDSet *fds) {
1968 if (!unit_can_serialize(u))
1971 if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0)
1975 unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type));
1982 void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) {
1993 va_start(ap, format);
1994 vfprintf(f, format, ap);
2000 void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) {
2006 fprintf(f, "%s=%s\n", key, value);
2009 int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
2016 if (!unit_can_serialize(u))
2020 char line[1024], *l, *v;
2023 if (!fgets(line, sizeof(line), f)) {
2036 k = strcspn(l, "=");
2044 if (streq(l, "job")) {
2047 if ((type = job_type_from_string(v)) < 0)
2048 log_debug("Failed to parse job type value %s", v);
2050 u->meta.deserialized_job = type;
2055 if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0)
2060 int unit_add_node_link(Unit *u, const char *what, bool wants) {
2070 /* Adds in links to the device node that this unit is based on */
2072 if (!is_device_path(what))
2075 if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
2078 r = manager_load_unit(u->meta.manager, e, NULL, NULL, &device);
2084 if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, device, true)) < 0)
2088 if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0)
2094 int unit_coldplug(Unit *u) {
2099 if (UNIT_VTABLE(u)->coldplug)
2100 if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0)
2103 if (u->meta.deserialized_job >= 0) {
2104 if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_FAIL, false, NULL, NULL)) < 0)
2107 u->meta.deserialized_job = _JOB_TYPE_INVALID;
2113 void unit_status_printf(Unit *u, const char *format, ...) {
2119 if (!UNIT_VTABLE(u)->show_status)
2122 if (u->meta.manager->running_as != MANAGER_SYSTEM)
2125 if (!u->meta.manager->show_status)
2128 if (!manager_is_booting_or_shutting_down(u->meta.manager))
2131 va_start(ap, format);
2132 status_vprintf(format, ap);
2136 bool unit_need_daemon_reload(Unit *u) {
2141 if (!u->meta.fragment_path)
2145 if (stat(u->meta.fragment_path, &st) < 0)
2146 /* What, cannot access this anymore? */
2150 u->meta.fragment_mtime &&
2151 timespec_load(&st.st_mtim) != u->meta.fragment_mtime;
2154 void unit_reset_failed(Unit *u) {
2157 if (UNIT_VTABLE(u)->reset_failed)
2158 UNIT_VTABLE(u)->reset_failed(u);
2161 Unit *unit_following(Unit *u) {
2164 if (UNIT_VTABLE(u)->following)
2165 return UNIT_VTABLE(u)->following(u);
2170 bool unit_pending_inactive(Unit *u) {
2173 /* Returns true if the unit is inactive or going down */
2175 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)))
2178 if (u->meta.job && u->meta.job->type == JOB_STOP)
2184 static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
2185 [UNIT_STUB] = "stub",
2186 [UNIT_LOADED] = "loaded",
2187 [UNIT_ERROR] = "error",
2188 [UNIT_MERGED] = "merged"
2191 DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState);
2193 static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = {
2194 [UNIT_ACTIVE] = "active",
2195 [UNIT_RELOADING] = "reloading",
2196 [UNIT_INACTIVE] = "inactive",
2197 [UNIT_FAILED] = "failed",
2198 [UNIT_ACTIVATING] = "activating",
2199 [UNIT_DEACTIVATING] = "deactivating"
2202 DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState);
2204 static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = {
2205 [UNIT_REQUIRES] = "Requires",
2206 [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable",
2207 [UNIT_WANTS] = "Wants",
2208 [UNIT_REQUISITE] = "Requisite",
2209 [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable",
2210 [UNIT_REQUIRED_BY] = "RequiredBy",
2211 [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable",
2212 [UNIT_WANTED_BY] = "WantedBy",
2213 [UNIT_CONFLICTS] = "Conflicts",
2214 [UNIT_CONFLICTED_BY] = "ConflictedBy",
2215 [UNIT_BEFORE] = "Before",
2216 [UNIT_AFTER] = "After",
2217 [UNIT_REFERENCES] = "References",
2218 [UNIT_REFERENCED_BY] = "ReferencedBy",
2219 [UNIT_ON_FAILURE] = "OnFailure"
2222 DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency);
2224 static const char* const kill_mode_table[_KILL_MODE_MAX] = {
2225 [KILL_CONTROL_GROUP] = "control-group",
2226 [KILL_PROCESS_GROUP] = "process-group",
2227 [KILL_PROCESS] = "process",
2228 [KILL_NONE] = "none"
2231 DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode);