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 int unit_add_default_target_dependency(Unit *u, Unit *target) {
733 if (target->meta.type != UNIT_TARGET)
736 /* Only add the dependency if boths units are loaded, so that
737 * that loop check below is reliable */
738 if (u->meta.load_state != UNIT_LOADED ||
739 target->meta.load_state != UNIT_LOADED)
742 /* Don't create loops */
743 if (set_get(target->meta.dependencies[UNIT_BEFORE], u))
746 return unit_add_dependency(target, UNIT_AFTER, u, true);
749 static int unit_add_default_dependencies(Unit *u) {
756 SET_FOREACH(target, u->meta.dependencies[UNIT_REQUIRED_BY], i)
757 if ((r = unit_add_default_target_dependency(u, target)) < 0)
760 SET_FOREACH(target, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
761 if ((r = unit_add_default_target_dependency(u, target)) < 0)
764 SET_FOREACH(target, u->meta.dependencies[UNIT_WANTED_BY], i)
765 if ((r = unit_add_default_target_dependency(u, target)) < 0)
771 int unit_load(Unit *u) {
776 if (u->meta.in_load_queue) {
777 LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta);
778 u->meta.in_load_queue = false;
781 if (u->meta.type == _UNIT_TYPE_INVALID)
784 if (u->meta.load_state != UNIT_STUB)
787 if (UNIT_VTABLE(u)->load)
788 if ((r = UNIT_VTABLE(u)->load(u)) < 0)
791 if (u->meta.load_state == UNIT_STUB) {
796 if (u->meta.load_state == UNIT_LOADED &&
797 u->meta.default_dependencies)
798 if ((r = unit_add_default_dependencies(u)) < 0)
801 assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into);
803 unit_add_to_dbus_queue(unit_follow_merge(u));
804 unit_add_to_gc_queue(u);
809 u->meta.load_state = UNIT_ERROR;
810 u->meta.load_error = r;
811 unit_add_to_dbus_queue(u);
813 log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r));
819 * -EBADR: This unit type does not support starting.
820 * -EALREADY: Unit is already started.
821 * -EAGAIN: An operation is already in progress. Retry later.
822 * -ECANCELED: Too many requests for now.
824 int unit_start(Unit *u) {
825 UnitActiveState state;
829 if (u->meta.load_state != UNIT_LOADED)
832 /* If this is already (being) started, then this will
833 * succeed. Note that this will even succeed if this unit is
834 * not startable by the user. This is relied on to detect when
835 * we need to wait for units and when waiting is finished. */
836 state = unit_active_state(u);
837 if (UNIT_IS_ACTIVE_OR_RELOADING(state))
840 /* If it is stopped, but we cannot start it, then fail */
841 if (!UNIT_VTABLE(u)->start)
844 /* We don't suppress calls to ->start() here when we are
845 * already starting, to allow this request to be used as a
846 * "hurry up" call, for example when the unit is in some "auto
847 * restart" state where it waits for a holdoff timer to elapse
848 * before it will start again. */
850 unit_add_to_dbus_queue(u);
852 unit_status_printf(u, "Starting %s...\n", unit_description(u));
854 return UNIT_VTABLE(u)->start(u);
857 bool unit_can_start(Unit *u) {
860 return !!UNIT_VTABLE(u)->start;
863 bool unit_can_isolate(Unit *u) {
866 return unit_can_start(u) &&
867 u->meta.allow_isolate;
871 * -EBADR: This unit type does not support stopping.
872 * -EALREADY: Unit is already stopped.
873 * -EAGAIN: An operation is already in progress. Retry later.
875 int unit_stop(Unit *u) {
876 UnitActiveState state;
880 state = unit_active_state(u);
881 if (UNIT_IS_INACTIVE_OR_FAILED(state))
884 if (!UNIT_VTABLE(u)->stop)
887 unit_add_to_dbus_queue(u);
889 unit_status_printf(u, "Stopping %s...\n", unit_description(u));
891 return UNIT_VTABLE(u)->stop(u);
895 * -EBADR: This unit type does not support reloading.
896 * -ENOEXEC: Unit is not started.
897 * -EAGAIN: An operation is already in progress. Retry later.
899 int unit_reload(Unit *u) {
900 UnitActiveState state;
904 if (u->meta.load_state != UNIT_LOADED)
907 if (!unit_can_reload(u))
910 state = unit_active_state(u);
911 if (state == UNIT_RELOADING)
914 if (state != UNIT_ACTIVE)
917 unit_add_to_dbus_queue(u);
918 return UNIT_VTABLE(u)->reload(u);
921 bool unit_can_reload(Unit *u) {
924 if (!UNIT_VTABLE(u)->reload)
927 if (!UNIT_VTABLE(u)->can_reload)
930 return UNIT_VTABLE(u)->can_reload(u);
933 static void unit_check_uneeded(Unit *u) {
939 /* If this service shall be shut down when unneeded then do
942 if (!u->meta.stop_when_unneeded)
945 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
948 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
949 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
952 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
953 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
956 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i)
957 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
960 log_info("Service %s is not needed anymore. Stopping.", u->meta.id);
962 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
963 manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL);
966 static void retroactively_start_dependencies(Unit *u) {
971 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)));
973 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
974 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
975 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
977 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
978 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
979 manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
981 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i)
982 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
983 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
985 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i)
986 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
987 manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
989 SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i)
990 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
991 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
993 SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTED_BY], i)
994 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
995 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
998 static void retroactively_stop_dependencies(Unit *u) {
1003 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)));
1005 if (u->meta.recursive_stop) {
1006 /* Pull down units need us recursively if enabled */
1007 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
1008 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1009 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
1012 /* Garbage collect services that might not be needed anymore, if enabled */
1013 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], 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_REQUIRES_OVERRIDABLE], 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_WANTS], i)
1020 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1021 unit_check_uneeded(other);
1022 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i)
1023 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1024 unit_check_uneeded(other);
1025 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
1026 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1027 unit_check_uneeded(other);
1030 void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
1035 assert(os < _UNIT_ACTIVE_STATE_MAX);
1036 assert(ns < _UNIT_ACTIVE_STATE_MAX);
1038 /* Note that this is called for all low-level state changes,
1039 * even if they might map to the same high-level
1040 * UnitActiveState! That means that ns == os is OK an expected
1041 * behaviour here. For example: if a mount point is remounted
1042 * this function will be called too! */
1044 dual_timestamp_get(&ts);
1046 if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns))
1047 u->meta.inactive_exit_timestamp = ts;
1048 else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns))
1049 u->meta.inactive_enter_timestamp = ts;
1051 if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns))
1052 u->meta.active_enter_timestamp = ts;
1053 else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns))
1054 u->meta.active_exit_timestamp = ts;
1056 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1057 cgroup_bonding_trim_list(u->meta.cgroup_bondings, true);
1059 timer_unit_notify(u, ns);
1060 path_unit_notify(u, ns);
1065 if (u->meta.job->state == JOB_WAITING)
1067 /* So we reached a different state for this
1068 * job. Let's see if we can run it now if it
1069 * failed previously due to EAGAIN. */
1070 job_add_to_run_queue(u->meta.job);
1072 /* Let's check whether this state change constitutes a
1073 * finished job, or maybe cotradicts a running job and
1074 * hence needs to invalidate jobs. */
1076 switch (u->meta.job->type) {
1079 case JOB_VERIFY_ACTIVE:
1081 if (UNIT_IS_ACTIVE_OR_RELOADING(ns))
1082 job_finish_and_invalidate(u->meta.job, true);
1083 else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) {
1086 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1087 job_finish_and_invalidate(u->meta.job, ns != UNIT_FAILED);
1093 case JOB_RELOAD_OR_START:
1095 if (u->meta.job->state == JOB_RUNNING) {
1096 if (ns == UNIT_ACTIVE)
1097 job_finish_and_invalidate(u->meta.job, true);
1098 else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) {
1101 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1102 job_finish_and_invalidate(u->meta.job, ns != UNIT_FAILED);
1110 case JOB_TRY_RESTART:
1112 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1113 job_finish_and_invalidate(u->meta.job, true);
1114 else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) {
1116 job_finish_and_invalidate(u->meta.job, false);
1122 assert_not_reached("Job type unknown");
1128 /* If this state change happened without being requested by a
1129 * job, then let's retroactively start or stop
1130 * dependencies. We skip that step when deserializing, since
1131 * we don't want to create any additional jobs just because
1132 * something is already activated. */
1134 if (unexpected && u->meta.manager->n_deserializing <= 0) {
1135 if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns))
1136 retroactively_start_dependencies(u);
1137 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
1138 retroactively_stop_dependencies(u);
1141 if (ns != os && ns == UNIT_FAILED) {
1145 SET_FOREACH(other, u->meta.dependencies[UNIT_ON_FAILURE], i)
1146 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1148 log_notice("Unit %s entered failed state.", u->meta.id);
1151 /* Some names are special */
1152 if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
1153 if (unit_has_name(u, SPECIAL_DBUS_SERVICE))
1154 /* The bus just might have become available,
1155 * hence try to connect to it, if we aren't
1157 bus_init(u->meta.manager);
1159 if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE))
1160 /* The syslog daemon just might have become
1161 * available, hence try to connect to it, if
1162 * we aren't yet connected. */
1165 if (u->meta.type == UNIT_SERVICE &&
1166 !UNIT_IS_ACTIVE_OR_RELOADING(os)) {
1167 /* Write audit record if we have just finished starting up */
1168 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, 1);
1169 u->meta.in_audit = true;
1174 if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE))
1175 /* The syslog daemon might just have
1176 * terminated, hence try to disconnect from
1180 /* We don't care about D-Bus here, since we'll get an
1181 * asynchronous notification for it anyway. */
1183 if (u->meta.type == UNIT_SERVICE &&
1184 UNIT_IS_INACTIVE_OR_FAILED(ns) &&
1185 !UNIT_IS_INACTIVE_OR_FAILED(os)) {
1187 /* Hmm, if there was no start record written
1188 * write it now, so that we always have a nice
1190 if (!u->meta.in_audit) {
1191 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE);
1193 if (ns == UNIT_INACTIVE)
1194 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, true);
1196 /* Write audit record if we have just finished shutting down */
1197 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE);
1199 u->meta.in_audit = false;
1203 /* Maybe we finished startup and are now ready for being
1204 * stopped because unneeded? */
1205 unit_check_uneeded(u);
1207 unit_add_to_dbus_queue(u);
1208 unit_add_to_gc_queue(u);
1211 int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) {
1212 struct epoll_event ev;
1217 assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u));
1223 if (epoll_ctl(u->meta.manager->epoll_fd,
1224 w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD,
1236 void unit_unwatch_fd(Unit *u, Watch *w) {
1240 if (w->type == WATCH_INVALID)
1243 assert(w->type == WATCH_FD);
1244 assert(w->data.unit == u);
1245 assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
1248 w->type = WATCH_INVALID;
1249 w->data.unit = NULL;
1252 int unit_watch_pid(Unit *u, pid_t pid) {
1256 /* Watch a specific PID. We only support one unit watching
1257 * each PID for now. */
1259 return hashmap_put(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u);
1262 void unit_unwatch_pid(Unit *u, pid_t pid) {
1266 hashmap_remove_value(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u);
1269 int unit_watch_timer(Unit *u, usec_t delay, Watch *w) {
1270 struct itimerspec its;
1276 assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u));
1278 /* This will try to reuse the old timer if there is one */
1280 if (w->type == WATCH_UNIT_TIMER) {
1281 assert(w->data.unit == u);
1286 } else if (w->type == WATCH_INVALID) {
1289 if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
1292 assert_not_reached("Invalid watch type");
1297 /* Set absolute time in the past, but not 0, since we
1298 * don't want to disarm the timer */
1299 its.it_value.tv_sec = 0;
1300 its.it_value.tv_nsec = 1;
1302 flags = TFD_TIMER_ABSTIME;
1304 timespec_store(&its.it_value, delay);
1308 /* This will also flush the elapse counter */
1309 if (timerfd_settime(fd, flags, &its, NULL) < 0)
1312 if (w->type == WATCH_INVALID) {
1313 struct epoll_event ev;
1317 ev.events = EPOLLIN;
1319 if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0)
1323 w->type = WATCH_UNIT_TIMER;
1331 close_nointr_nofail(fd);
1336 void unit_unwatch_timer(Unit *u, Watch *w) {
1340 if (w->type == WATCH_INVALID)
1343 assert(w->type == WATCH_UNIT_TIMER);
1344 assert(w->data.unit == u);
1347 assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
1348 close_nointr_nofail(w->fd);
1351 w->type = WATCH_INVALID;
1352 w->data.unit = NULL;
1355 bool unit_job_is_applicable(Unit *u, JobType j) {
1357 assert(j >= 0 && j < _JOB_TYPE_MAX);
1361 case JOB_VERIFY_ACTIVE:
1367 case JOB_TRY_RESTART:
1368 return unit_can_start(u);
1371 return unit_can_reload(u);
1373 case JOB_RELOAD_OR_START:
1374 return unit_can_reload(u) && unit_can_start(u);
1377 assert_not_reached("Invalid job type");
1381 int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) {
1383 static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = {
1384 [UNIT_REQUIRES] = UNIT_REQUIRED_BY,
1385 [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
1386 [UNIT_WANTS] = UNIT_WANTED_BY,
1387 [UNIT_REQUISITE] = UNIT_REQUIRED_BY,
1388 [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
1389 [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID,
1390 [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID,
1391 [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID,
1392 [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY,
1393 [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS,
1394 [UNIT_BEFORE] = UNIT_AFTER,
1395 [UNIT_AFTER] = UNIT_BEFORE,
1396 [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID,
1397 [UNIT_REFERENCES] = UNIT_REFERENCED_BY,
1398 [UNIT_REFERENCED_BY] = UNIT_REFERENCES
1400 int r, q = 0, v = 0, w = 0;
1403 assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX);
1406 /* We won't allow dependencies on ourselves. We will not
1407 * consider them an error however. */
1411 if (UNIT_VTABLE(u)->no_requires &&
1412 (d == UNIT_REQUIRES ||
1413 d == UNIT_REQUIRES_OVERRIDABLE ||
1414 d == UNIT_REQUISITE ||
1415 d == UNIT_REQUISITE_OVERRIDABLE)) {
1419 if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0)
1422 if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
1423 if ((r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0)
1427 if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 ||
1428 (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0)
1431 if ((q = set_put(u->meta.dependencies[d], other)) < 0)
1434 if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
1435 if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) {
1440 if (add_reference) {
1441 if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) {
1446 if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0)
1450 unit_add_to_dbus_queue(u);
1455 set_remove(u->meta.dependencies[d], other);
1458 set_remove(other->meta.dependencies[inverse_table[d]], u);
1461 set_remove(u->meta.dependencies[UNIT_REFERENCES], other);
1466 int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) {
1471 if ((r = unit_add_dependency(u, d, other, add_reference)) < 0)
1474 if ((r = unit_add_dependency(u, e, other, add_reference)) < 0)
1480 static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) {
1484 assert(name || path);
1487 name = file_name_from_path(path);
1489 if (!unit_name_is_template(name)) {
1494 if (u->meta.instance)
1495 s = unit_name_replace_instance(name, u->meta.instance);
1499 if (!(i = unit_name_to_prefix(u->meta.id)))
1502 s = unit_name_replace_instance(name, i);
1513 int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
1519 assert(name || path);
1521 if (!(name = resolve_template(u, name, path, &s)))
1524 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1527 r = unit_add_dependency(u, d, other, add_reference);
1534 int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
1540 assert(name || path);
1542 if (!(name = resolve_template(u, name, path, &s)))
1545 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1548 r = unit_add_two_dependencies(u, d, e, other, add_reference);
1555 int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
1561 assert(name || path);
1563 if (!(name = resolve_template(u, name, path, &s)))
1566 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1569 r = unit_add_dependency(other, d, u, add_reference);
1576 int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
1582 assert(name || path);
1584 if (!(name = resolve_template(u, name, path, &s)))
1587 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1590 if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0)
1598 int set_unit_path(const char *p) {
1602 /* This is mostly for debug purposes */
1604 if (path_is_absolute(p)) {
1605 if (!(c = strdup(p)))
1608 if (!(cwd = get_current_dir_name()))
1611 r = asprintf(&c, "%s/%s", cwd, p);
1618 if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) {
1627 char *unit_dbus_path(Unit *u) {
1635 if (!(e = bus_path_escape(u->meta.id)))
1638 p = strappend("/org/freedesktop/systemd1/unit/", e);
1644 int unit_add_cgroup(Unit *u, CGroupBonding *b) {
1654 if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER)))
1657 /* Ensure this hasn't been added yet */
1660 l = hashmap_get(u->meta.manager->cgroup_bondings, b->path);
1661 LIST_PREPEND(CGroupBonding, by_path, l, b);
1663 if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) {
1664 LIST_REMOVE(CGroupBonding, by_path, l, b);
1668 LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b);
1674 static char *default_cgroup_path(Unit *u) {
1680 if (u->meta.instance) {
1683 if (!(t = unit_name_template(u->meta.id)))
1686 r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance);
1689 r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id);
1691 return r < 0 ? NULL : p;
1694 int unit_add_cgroup_from_text(Unit *u, const char *name) {
1695 char *controller = NULL, *path = NULL;
1696 CGroupBonding *b = NULL;
1702 if ((r = cg_split_spec(name, &controller, &path)) < 0)
1706 path = default_cgroup_path(u);
1709 controller = strdup(SYSTEMD_CGROUP_CONTROLLER);
1711 if (!path || !controller) {
1718 if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) {
1723 if (!(b = new0(CGroupBonding, 1))) {
1728 b->controller = controller;
1731 b->clean_up = false;
1733 if ((r = unit_add_cgroup(u, b)) < 0)
1746 int unit_add_default_cgroup(Unit *u) {
1752 /* Adds in the default cgroup data, if it wasn't specified yet */
1754 if (unit_get_default_cgroup(u))
1757 if (!(b = new0(CGroupBonding, 1)))
1760 if (!(b->path = default_cgroup_path(u)))
1766 if ((r = unit_add_cgroup(u, b)) < 0)
1773 free(b->controller);
1779 CGroupBonding* unit_get_default_cgroup(Unit *u) {
1782 return cgroup_bonding_find_list(u->meta.cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER);
1785 int unit_load_related_unit(Unit *u, const char *type, Unit **_found) {
1793 if (!(t = unit_name_change_suffix(u->meta.id, type)))
1796 assert(!unit_has_name(u, t));
1798 r = manager_load_unit(u->meta.manager, t, NULL, NULL, _found);
1801 assert(r < 0 || *_found != u);
1806 int unit_get_related_unit(Unit *u, const char *type, Unit **_found) {
1814 if (!(t = unit_name_change_suffix(u->meta.id, type)))
1817 assert(!unit_has_name(u, t));
1819 found = manager_get_unit(u->meta.manager, t);
1829 static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) {
1833 return unit_name_to_prefix_and_instance(u->meta.id);
1836 static char *specifier_prefix(char specifier, void *data, void *userdata) {
1840 return unit_name_to_prefix(u->meta.id);
1843 static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) {
1849 if (!(p = unit_name_to_prefix(u->meta.id)))
1852 r = unit_name_unescape(p);
1858 static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) {
1862 if (u->meta.instance)
1863 return unit_name_unescape(u->meta.instance);
1868 char *unit_name_printf(Unit *u, const char* format) {
1871 * This will use the passed string as format string and
1872 * replace the following specifiers:
1874 * %n: the full id of the unit (foo@bar.waldo)
1875 * %N: the id of the unit without the suffix (foo@bar)
1876 * %p: the prefix (foo)
1877 * %i: the instance (bar)
1880 const Specifier table[] = {
1881 { 'n', specifier_string, u->meta.id },
1882 { 'N', specifier_prefix_and_instance, NULL },
1883 { 'p', specifier_prefix, NULL },
1884 { 'i', specifier_string, u->meta.instance },
1891 return specifier_printf(format, table, u);
1894 char *unit_full_printf(Unit *u, const char *format) {
1896 /* This is similar to unit_name_printf() but also supports
1899 const Specifier table[] = {
1900 { 'n', specifier_string, u->meta.id },
1901 { 'N', specifier_prefix_and_instance, NULL },
1902 { 'p', specifier_prefix, NULL },
1903 { 'P', specifier_prefix_unescaped, NULL },
1904 { 'i', specifier_string, u->meta.instance },
1905 { 'I', specifier_instance_unescaped, NULL },
1912 return specifier_printf(format, table, u);
1915 char **unit_full_printf_strv(Unit *u, char **l) {
1919 /* Applies unit_full_printf to every entry in l */
1924 if (!(r = new(char*, n+1)))
1927 for (i = l, j = r; *i; i++, j++)
1928 if (!(*j = unit_full_printf(u, *i)))
1944 int unit_watch_bus_name(Unit *u, const char *name) {
1948 /* Watch a specific name on the bus. We only support one unit
1949 * watching each name for now. */
1951 return hashmap_put(u->meta.manager->watch_bus, name, u);
1954 void unit_unwatch_bus_name(Unit *u, const char *name) {
1958 hashmap_remove_value(u->meta.manager->watch_bus, name, u);
1961 bool unit_can_serialize(Unit *u) {
1964 return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item;
1967 int unit_serialize(Unit *u, FILE *f, FDSet *fds) {
1974 if (!unit_can_serialize(u))
1977 if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0)
1981 unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type));
1988 void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) {
1999 va_start(ap, format);
2000 vfprintf(f, format, ap);
2006 void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) {
2012 fprintf(f, "%s=%s\n", key, value);
2015 int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
2022 if (!unit_can_serialize(u))
2026 char line[1024], *l, *v;
2029 if (!fgets(line, sizeof(line), f)) {
2042 k = strcspn(l, "=");
2050 if (streq(l, "job")) {
2053 if ((type = job_type_from_string(v)) < 0)
2054 log_debug("Failed to parse job type value %s", v);
2056 u->meta.deserialized_job = type;
2061 if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0)
2066 int unit_add_node_link(Unit *u, const char *what, bool wants) {
2076 /* Adds in links to the device node that this unit is based on */
2078 if (!is_device_path(what))
2081 if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
2084 r = manager_load_unit(u->meta.manager, e, NULL, NULL, &device);
2090 if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, device, true)) < 0)
2094 if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0)
2100 int unit_coldplug(Unit *u) {
2105 if (UNIT_VTABLE(u)->coldplug)
2106 if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0)
2109 if (u->meta.deserialized_job >= 0) {
2110 if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_FAIL, false, NULL, NULL)) < 0)
2113 u->meta.deserialized_job = _JOB_TYPE_INVALID;
2119 void unit_status_printf(Unit *u, const char *format, ...) {
2125 if (!UNIT_VTABLE(u)->show_status)
2128 if (u->meta.manager->running_as != MANAGER_SYSTEM)
2131 if (!u->meta.manager->show_status)
2134 if (!manager_is_booting_or_shutting_down(u->meta.manager))
2137 va_start(ap, format);
2138 status_vprintf(format, ap);
2142 bool unit_need_daemon_reload(Unit *u) {
2147 if (!u->meta.fragment_path)
2151 if (stat(u->meta.fragment_path, &st) < 0)
2152 /* What, cannot access this anymore? */
2156 u->meta.fragment_mtime &&
2157 timespec_load(&st.st_mtim) != u->meta.fragment_mtime;
2160 void unit_reset_failed(Unit *u) {
2163 if (UNIT_VTABLE(u)->reset_failed)
2164 UNIT_VTABLE(u)->reset_failed(u);
2167 Unit *unit_following(Unit *u) {
2170 if (UNIT_VTABLE(u)->following)
2171 return UNIT_VTABLE(u)->following(u);
2176 bool unit_pending_inactive(Unit *u) {
2179 /* Returns true if the unit is inactive or going down */
2181 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)))
2184 if (u->meta.job && u->meta.job->type == JOB_STOP)
2190 static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
2191 [UNIT_STUB] = "stub",
2192 [UNIT_LOADED] = "loaded",
2193 [UNIT_ERROR] = "error",
2194 [UNIT_MERGED] = "merged"
2197 DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState);
2199 static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = {
2200 [UNIT_ACTIVE] = "active",
2201 [UNIT_RELOADING] = "reloading",
2202 [UNIT_INACTIVE] = "inactive",
2203 [UNIT_FAILED] = "failed",
2204 [UNIT_ACTIVATING] = "activating",
2205 [UNIT_DEACTIVATING] = "deactivating"
2208 DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState);
2210 static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = {
2211 [UNIT_REQUIRES] = "Requires",
2212 [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable",
2213 [UNIT_WANTS] = "Wants",
2214 [UNIT_REQUISITE] = "Requisite",
2215 [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable",
2216 [UNIT_REQUIRED_BY] = "RequiredBy",
2217 [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable",
2218 [UNIT_WANTED_BY] = "WantedBy",
2219 [UNIT_CONFLICTS] = "Conflicts",
2220 [UNIT_CONFLICTED_BY] = "ConflictedBy",
2221 [UNIT_BEFORE] = "Before",
2222 [UNIT_AFTER] = "After",
2223 [UNIT_REFERENCES] = "References",
2224 [UNIT_REFERENCED_BY] = "ReferencedBy",
2225 [UNIT_ON_FAILURE] = "OnFailure"
2228 DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency);
2230 static const char* const kill_mode_table[_KILL_MODE_MAX] = {
2231 [KILL_CONTROL_GROUP] = "control-group",
2232 [KILL_PROCESS_GROUP] = "process-group",
2233 [KILL_PROCESS] = "process",
2234 [KILL_NONE] = "none"
2237 DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode);