1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/epoll.h>
26 #include <sys/timerfd.h>
36 #include "load-fragment.h"
37 #include "load-dropin.h"
39 #include "unit-name.h"
40 #include "specifier.h"
41 #include "dbus-unit.h"
43 #include "cgroup-util.h"
45 #include "cgroup-attr.h"
47 const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = {
48 [UNIT_SERVICE] = &service_vtable,
49 [UNIT_TIMER] = &timer_vtable,
50 [UNIT_SOCKET] = &socket_vtable,
51 [UNIT_TARGET] = &target_vtable,
52 [UNIT_DEVICE] = &device_vtable,
53 [UNIT_MOUNT] = &mount_vtable,
54 [UNIT_AUTOMOUNT] = &automount_vtable,
55 [UNIT_SNAPSHOT] = &snapshot_vtable,
56 [UNIT_SWAP] = &swap_vtable,
57 [UNIT_PATH] = &path_vtable
60 Unit *unit_new(Manager *m) {
65 if (!(u = new0(Unit, 1)))
68 if (!(u->meta.names = set_new(string_hash_func, string_compare_func))) {
74 u->meta.type = _UNIT_TYPE_INVALID;
75 u->meta.deserialized_job = _JOB_TYPE_INVALID;
76 u->meta.default_dependencies = true;
77 u->meta.unit_file_state = _UNIT_FILE_STATE_INVALID;
82 bool unit_has_name(Unit *u, const char *name) {
86 return !!set_get(u->meta.names, (char*) name);
89 int unit_add_name(Unit *u, const char *text) {
97 if (unit_name_is_template(text)) {
98 if (!u->meta.instance)
101 s = unit_name_replace_instance(text, u->meta.instance);
108 if (!unit_name_is_valid(s, false)) {
113 assert_se((t = unit_name_to_type(s)) >= 0);
115 if (u->meta.type != _UNIT_TYPE_INVALID && t != u->meta.type) {
120 if ((r = unit_name_to_instance(s, &i)) < 0)
123 if (i && unit_vtable[t]->no_instances) {
128 /* Ensure that this unit is either instanced or not instanced,
130 if (u->meta.type != _UNIT_TYPE_INVALID && !u->meta.instance != !i) {
135 if (unit_vtable[t]->no_alias &&
136 !set_isempty(u->meta.names) &&
137 !set_get(u->meta.names, s)) {
142 if (hashmap_size(u->meta.manager->units) >= MANAGER_MAX_NAMES) {
147 if ((r = set_put(u->meta.names, s)) < 0) {
153 if ((r = hashmap_put(u->meta.manager->units, s, u)) < 0) {
154 set_remove(u->meta.names, s);
158 if (u->meta.type == _UNIT_TYPE_INVALID) {
162 u->meta.instance = i;
164 LIST_PREPEND(Meta, units_by_type, u->meta.manager->units_by_type[t], &u->meta);
166 if (UNIT_VTABLE(u)->init)
167 UNIT_VTABLE(u)->init(u);
171 unit_add_to_dbus_queue(u);
181 int unit_choose_id(Unit *u, const char *name) {
182 char *s, *t = NULL, *i;
188 if (unit_name_is_template(name)) {
190 if (!u->meta.instance)
193 if (!(t = unit_name_replace_instance(name, u->meta.instance)))
199 /* Selects one of the names of this unit as the id */
200 s = set_get(u->meta.names, (char*) name);
206 if ((r = unit_name_to_instance(s, &i)) < 0)
211 free(u->meta.instance);
212 u->meta.instance = i;
214 unit_add_to_dbus_queue(u);
219 int unit_set_description(Unit *u, const char *description) {
224 if (!(s = strdup(description)))
227 free(u->meta.description);
228 u->meta.description = s;
230 unit_add_to_dbus_queue(u);
234 bool unit_check_gc(Unit *u) {
237 if (u->meta.load_state == UNIT_STUB)
240 if (UNIT_VTABLE(u)->no_gc)
249 if (unit_active_state(u) != UNIT_INACTIVE)
252 if (UNIT_VTABLE(u)->check_gc)
253 if (UNIT_VTABLE(u)->check_gc(u))
259 void unit_add_to_load_queue(Unit *u) {
261 assert(u->meta.type != _UNIT_TYPE_INVALID);
263 if (u->meta.load_state != UNIT_STUB || u->meta.in_load_queue)
266 LIST_PREPEND(Meta, load_queue, u->meta.manager->load_queue, &u->meta);
267 u->meta.in_load_queue = true;
270 void unit_add_to_cleanup_queue(Unit *u) {
273 if (u->meta.in_cleanup_queue)
276 LIST_PREPEND(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta);
277 u->meta.in_cleanup_queue = true;
280 void unit_add_to_gc_queue(Unit *u) {
283 if (u->meta.in_gc_queue || u->meta.in_cleanup_queue)
286 if (unit_check_gc(u))
289 LIST_PREPEND(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta);
290 u->meta.in_gc_queue = true;
292 u->meta.manager->n_in_gc_queue ++;
294 if (u->meta.manager->gc_queue_timestamp <= 0)
295 u->meta.manager->gc_queue_timestamp = now(CLOCK_MONOTONIC);
298 void unit_add_to_dbus_queue(Unit *u) {
300 assert(u->meta.type != _UNIT_TYPE_INVALID);
302 if (u->meta.load_state == UNIT_STUB || u->meta.in_dbus_queue)
305 /* Shortcut things if nobody cares */
306 if (!bus_has_subscriber(u->meta.manager)) {
307 u->meta.sent_dbus_new_signal = true;
311 LIST_PREPEND(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
312 u->meta.in_dbus_queue = true;
315 static void bidi_set_free(Unit *u, Set *s) {
321 /* Frees the set and makes sure we are dropped from the
322 * inverse pointers */
324 SET_FOREACH(other, s, i) {
327 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
328 set_remove(other->meta.dependencies[d], u);
330 unit_add_to_gc_queue(other);
336 void unit_free(Unit *u) {
343 bus_unit_send_removed_signal(u);
345 if (u->meta.load_state != UNIT_STUB)
346 if (UNIT_VTABLE(u)->done)
347 UNIT_VTABLE(u)->done(u);
349 SET_FOREACH(t, u->meta.names, i)
350 hashmap_remove_value(u->meta.manager->units, t, u);
353 job_free(u->meta.job);
355 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
356 bidi_set_free(u, u->meta.dependencies[d]);
358 if (u->meta.type != _UNIT_TYPE_INVALID)
359 LIST_REMOVE(Meta, units_by_type, u->meta.manager->units_by_type[u->meta.type], &u->meta);
361 if (u->meta.in_load_queue)
362 LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta);
364 if (u->meta.in_dbus_queue)
365 LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
367 if (u->meta.in_cleanup_queue)
368 LIST_REMOVE(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta);
370 if (u->meta.in_gc_queue) {
371 LIST_REMOVE(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta);
372 u->meta.manager->n_in_gc_queue--;
375 cgroup_bonding_free_list(u->meta.cgroup_bondings, u->meta.manager->n_reloading <= 0);
376 cgroup_attribute_free_list(u->meta.cgroup_attributes);
378 free(u->meta.description);
379 free(u->meta.fragment_path);
381 set_free_free(u->meta.names);
383 condition_free_list(u->meta.conditions);
385 free(u->meta.instance);
389 UnitActiveState unit_active_state(Unit *u) {
392 if (u->meta.load_state == UNIT_MERGED)
393 return unit_active_state(unit_follow_merge(u));
395 /* After a reload it might happen that a unit is not correctly
396 * loaded but still has a process around. That's why we won't
397 * shortcut failed loading to UNIT_INACTIVE_FAILED. */
399 return UNIT_VTABLE(u)->active_state(u);
402 const char* unit_sub_state_to_string(Unit *u) {
405 return UNIT_VTABLE(u)->sub_state_to_string(u);
408 static void complete_move(Set **s, Set **other) {
416 set_move(*s, *other);
423 static void merge_names(Unit *u, Unit *other) {
430 complete_move(&u->meta.names, &other->meta.names);
432 set_free_free(other->meta.names);
433 other->meta.names = NULL;
434 other->meta.id = NULL;
436 SET_FOREACH(t, u->meta.names, i)
437 assert_se(hashmap_replace(u->meta.manager->units, t, u) == 0);
440 static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) {
447 assert(d < _UNIT_DEPENDENCY_MAX);
449 /* Fix backwards pointers */
450 SET_FOREACH(back, other->meta.dependencies[d], i) {
453 for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++)
454 if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) {
457 set_remove(back->meta.dependencies[k], other);
459 assert(r == -ENOENT);
463 complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]);
465 set_free(other->meta.dependencies[d]);
466 other->meta.dependencies[d] = NULL;
469 int unit_merge(Unit *u, Unit *other) {
474 assert(u->meta.manager == other->meta.manager);
475 assert(u->meta.type != _UNIT_TYPE_INVALID);
477 other = unit_follow_merge(other);
482 if (u->meta.type != other->meta.type)
485 if (!u->meta.instance != !other->meta.instance)
488 if (other->meta.load_state != UNIT_STUB &&
489 other->meta.load_state != UNIT_ERROR)
495 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other)))
499 merge_names(u, other);
501 /* Merge dependencies */
502 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
503 merge_dependencies(u, other, d);
505 other->meta.load_state = UNIT_MERGED;
506 other->meta.merged_into = u;
508 /* If there is still some data attached to the other node, we
509 * don't need it anymore, and can free it. */
510 if (other->meta.load_state != UNIT_STUB)
511 if (UNIT_VTABLE(other)->done)
512 UNIT_VTABLE(other)->done(other);
514 unit_add_to_dbus_queue(u);
515 unit_add_to_cleanup_queue(other);
520 int unit_merge_by_name(Unit *u, const char *name) {
528 if (unit_name_is_template(name)) {
529 if (!u->meta.instance)
532 if (!(s = unit_name_replace_instance(name, u->meta.instance)))
538 if (!(other = manager_get_unit(u->meta.manager, name)))
539 r = unit_add_name(u, name);
541 r = unit_merge(u, other);
547 Unit* unit_follow_merge(Unit *u) {
550 while (u->meta.load_state == UNIT_MERGED)
551 assert_se(u = u->meta.merged_into);
556 int unit_add_exec_dependencies(Unit *u, ExecContext *c) {
562 if (c->std_output != EXEC_OUTPUT_KMSG &&
563 c->std_output != EXEC_OUTPUT_SYSLOG &&
564 c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE &&
565 c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE &&
566 c->std_error != EXEC_OUTPUT_KMSG &&
567 c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE &&
568 c->std_error != EXEC_OUTPUT_KMSG &&
569 c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE)
572 /* If syslog or kernel logging is requested, make sure our own
573 * logging daemon is run first. */
575 if (u->meta.manager->running_as == MANAGER_SYSTEM)
576 if ((r = unit_add_two_dependencies_by_name(u, UNIT_REQUIRES, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0)
582 const char *unit_description(Unit *u) {
585 if (u->meta.description)
586 return u->meta.description;
588 return strna(u->meta.id);
591 void unit_dump(Unit *u, FILE *f, const char *prefix) {
598 timestamp1[FORMAT_TIMESTAMP_MAX],
599 timestamp2[FORMAT_TIMESTAMP_MAX],
600 timestamp3[FORMAT_TIMESTAMP_MAX],
601 timestamp4[FORMAT_TIMESTAMP_MAX],
602 timespan[FORMAT_TIMESPAN_MAX];
606 assert(u->meta.type >= 0);
610 p2 = strappend(prefix, "\t");
611 prefix2 = p2 ? p2 : prefix;
615 "%s\tDescription: %s\n"
617 "%s\tUnit Load State: %s\n"
618 "%s\tUnit Active State: %s\n"
619 "%s\tInactive Exit Timestamp: %s\n"
620 "%s\tActive Enter Timestamp: %s\n"
621 "%s\tActive Exit Timestamp: %s\n"
622 "%s\tInactive Enter Timestamp: %s\n"
623 "%s\tGC Check Good: %s\n"
624 "%s\tNeed Daemon Reload: %s\n",
626 prefix, unit_description(u),
627 prefix, strna(u->meta.instance),
628 prefix, unit_load_state_to_string(u->meta.load_state),
629 prefix, unit_active_state_to_string(unit_active_state(u)),
630 prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.inactive_exit_timestamp.realtime)),
631 prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)),
632 prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)),
633 prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)),
634 prefix, yes_no(unit_check_gc(u)),
635 prefix, yes_no(unit_need_daemon_reload(u)));
637 SET_FOREACH(t, u->meta.names, i)
638 fprintf(f, "%s\tName: %s\n", prefix, t);
640 if ((following = unit_following(u)))
641 fprintf(f, "%s\tFollowing: %s\n", prefix, following->meta.id);
643 if (u->meta.fragment_path)
644 fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path);
646 if (u->meta.job_timeout > 0)
647 fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->meta.job_timeout));
649 condition_dump_list(u->meta.conditions, f, prefix);
651 if (dual_timestamp_is_set(&u->meta.condition_timestamp))
653 "%s\tCondition Timestamp: %s\n"
654 "%s\tCondition Result: %s\n",
655 prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.condition_timestamp.realtime)),
656 prefix, yes_no(u->meta.condition_result));
658 for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) {
661 SET_FOREACH(other, u->meta.dependencies[d], i)
662 fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id);
665 if (u->meta.load_state == UNIT_LOADED) {
670 "%s\tStopWhenUnneeded: %s\n"
671 "%s\tRefuseManualStart: %s\n"
672 "%s\tRefuseManualStop: %s\n"
673 "%s\tDefaultDependencies: %s\n"
674 "%s\tOnFailureIsolate: %s\n"
675 "%s\tIgnoreOnIsolate: %s\n"
676 "%s\tIgnoreOnSnapshot: %s\n",
677 prefix, yes_no(u->meta.stop_when_unneeded),
678 prefix, yes_no(u->meta.refuse_manual_start),
679 prefix, yes_no(u->meta.refuse_manual_stop),
680 prefix, yes_no(u->meta.default_dependencies),
681 prefix, yes_no(u->meta.on_failure_isolate),
682 prefix, yes_no(u->meta.ignore_on_isolate),
683 prefix, yes_no(u->meta.ignore_on_snapshot));
685 LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings)
686 fprintf(f, "%s\tControlGroup: %s:%s\n",
687 prefix, b->controller, b->path);
689 LIST_FOREACH(by_unit, a, u->meta.cgroup_attributes)
690 fprintf(f, "%s\tControlGroupAttribute: %s %s \"%s\"\n",
691 prefix, a->controller, a->name, a->value);
693 if (UNIT_VTABLE(u)->dump)
694 UNIT_VTABLE(u)->dump(u, f, prefix2);
696 } else if (u->meta.load_state == UNIT_MERGED)
698 "%s\tMerged into: %s\n",
699 prefix, u->meta.merged_into->meta.id);
700 else if (u->meta.load_state == UNIT_ERROR)
701 fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->meta.load_error));
705 job_dump(u->meta.job, f, prefix2);
710 /* Common implementation for multiple backends */
711 int unit_load_fragment_and_dropin(Unit *u) {
716 /* Load a .service file */
717 if ((r = unit_load_fragment(u)) < 0)
720 if (u->meta.load_state == UNIT_STUB)
723 /* Load drop-in directory data */
724 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
730 /* Common implementation for multiple backends */
731 int unit_load_fragment_and_dropin_optional(Unit *u) {
736 /* Same as unit_load_fragment_and_dropin(), but whether
737 * something can be loaded or not doesn't matter. */
739 /* Load a .service file */
740 if ((r = unit_load_fragment(u)) < 0)
743 if (u->meta.load_state == UNIT_STUB)
744 u->meta.load_state = UNIT_LOADED;
746 /* Load drop-in directory data */
747 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
753 int unit_add_default_target_dependency(Unit *u, Unit *target) {
757 if (target->meta.type != UNIT_TARGET)
760 /* Only add the dependency if both units are loaded, so that
761 * that loop check below is reliable */
762 if (u->meta.load_state != UNIT_LOADED ||
763 target->meta.load_state != UNIT_LOADED)
766 /* If either side wants no automatic dependencies, then let's
768 if (!u->meta.default_dependencies ||
769 target->meta.default_dependencies)
772 /* Don't create loops */
773 if (set_get(target->meta.dependencies[UNIT_BEFORE], u))
776 return unit_add_dependency(target, UNIT_AFTER, u, true);
779 static int unit_add_default_dependencies(Unit *u) {
780 static const UnitDependency deps[] = {
782 UNIT_REQUIRED_BY_OVERRIDABLE,
794 for (k = 0; k < ELEMENTSOF(deps); k++)
795 SET_FOREACH(target, u->meta.dependencies[deps[k]], i)
796 if ((r = unit_add_default_target_dependency(u, target)) < 0)
802 int unit_load(Unit *u) {
807 if (u->meta.in_load_queue) {
808 LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta);
809 u->meta.in_load_queue = false;
812 if (u->meta.type == _UNIT_TYPE_INVALID)
815 if (u->meta.load_state != UNIT_STUB)
818 if (UNIT_VTABLE(u)->load)
819 if ((r = UNIT_VTABLE(u)->load(u)) < 0)
822 if (u->meta.load_state == UNIT_STUB) {
827 if (u->meta.load_state == UNIT_LOADED &&
828 u->meta.default_dependencies)
829 if ((r = unit_add_default_dependencies(u)) < 0)
832 if (u->meta.on_failure_isolate &&
833 set_size(u->meta.dependencies[UNIT_ON_FAILURE]) > 1) {
835 log_error("More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.",
842 assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into);
844 unit_add_to_dbus_queue(unit_follow_merge(u));
845 unit_add_to_gc_queue(u);
850 u->meta.load_state = UNIT_ERROR;
851 u->meta.load_error = r;
852 unit_add_to_dbus_queue(u);
854 log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r));
859 bool unit_condition_test(Unit *u) {
862 dual_timestamp_get(&u->meta.condition_timestamp);
863 u->meta.condition_result = condition_test_list(u->meta.conditions);
865 return u->meta.condition_result;
869 * -EBADR: This unit type does not support starting.
870 * -EALREADY: Unit is already started.
871 * -EAGAIN: An operation is already in progress. Retry later.
872 * -ECANCELED: Too many requests for now.
874 int unit_start(Unit *u) {
875 UnitActiveState state;
880 if (u->meta.load_state != UNIT_LOADED)
883 /* If this is already (being) started, then this will
884 * succeed. Note that this will even succeed if this unit is
885 * not startable by the user. This is relied on to detect when
886 * we need to wait for units and when waiting is finished. */
887 state = unit_active_state(u);
888 if (UNIT_IS_ACTIVE_OR_RELOADING(state))
891 /* If the conditions failed, don't do anything at all */
892 if (!unit_condition_test(u)) {
893 log_debug("Starting of %s requested but condition failed. Ignoring.", u->meta.id);
897 /* Forward to the main object, if we aren't it. */
898 if ((following = unit_following(u))) {
899 log_debug("Redirecting start request from %s to %s.", u->meta.id, following->meta.id);
900 return unit_start(following);
903 /* If it is stopped, but we cannot start it, then fail */
904 if (!UNIT_VTABLE(u)->start)
907 /* We don't suppress calls to ->start() here when we are
908 * already starting, to allow this request to be used as a
909 * "hurry up" call, for example when the unit is in some "auto
910 * restart" state where it waits for a holdoff timer to elapse
911 * before it will start again. */
913 unit_add_to_dbus_queue(u);
915 unit_status_printf(u, "Starting %s...\n", unit_description(u));
916 return UNIT_VTABLE(u)->start(u);
919 bool unit_can_start(Unit *u) {
922 return !!UNIT_VTABLE(u)->start;
925 bool unit_can_isolate(Unit *u) {
928 return unit_can_start(u) &&
929 u->meta.allow_isolate;
933 * -EBADR: This unit type does not support stopping.
934 * -EALREADY: Unit is already stopped.
935 * -EAGAIN: An operation is already in progress. Retry later.
937 int unit_stop(Unit *u) {
938 UnitActiveState state;
943 state = unit_active_state(u);
944 if (UNIT_IS_INACTIVE_OR_FAILED(state))
947 if ((following = unit_following(u))) {
948 log_debug("Redirecting stop request from %s to %s.", u->meta.id, following->meta.id);
949 return unit_stop(following);
952 if (!UNIT_VTABLE(u)->stop)
955 unit_add_to_dbus_queue(u);
957 unit_status_printf(u, "Stopping %s...\n", unit_description(u));
958 return UNIT_VTABLE(u)->stop(u);
962 * -EBADR: This unit type does not support reloading.
963 * -ENOEXEC: Unit is not started.
964 * -EAGAIN: An operation is already in progress. Retry later.
966 int unit_reload(Unit *u) {
967 UnitActiveState state;
972 if (u->meta.load_state != UNIT_LOADED)
975 if (!unit_can_reload(u))
978 state = unit_active_state(u);
979 if (state == UNIT_RELOADING)
982 if (state != UNIT_ACTIVE)
985 if ((following = unit_following(u))) {
986 log_debug("Redirecting reload request from %s to %s.", u->meta.id, following->meta.id);
987 return unit_reload(following);
990 unit_add_to_dbus_queue(u);
991 return UNIT_VTABLE(u)->reload(u);
994 bool unit_can_reload(Unit *u) {
997 if (!UNIT_VTABLE(u)->reload)
1000 if (!UNIT_VTABLE(u)->can_reload)
1003 return UNIT_VTABLE(u)->can_reload(u);
1006 static void unit_check_unneeded(Unit *u) {
1012 /* If this service shall be shut down when unneeded then do
1015 if (!u->meta.stop_when_unneeded)
1018 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
1021 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
1022 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1025 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
1026 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1029 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i)
1030 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1033 SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i)
1034 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1037 log_info("Service %s is not needed anymore. Stopping.", u->meta.id);
1039 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
1040 manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL);
1043 static void retroactively_start_dependencies(Unit *u) {
1048 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)));
1050 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
1051 if (!set_get(u->meta.dependencies[UNIT_AFTER], other) &&
1052 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1053 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1055 SET_FOREACH(other, u->meta.dependencies[UNIT_BIND_TO], i)
1056 if (!set_get(u->meta.dependencies[UNIT_AFTER], other) &&
1057 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1058 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1060 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1061 if (!set_get(u->meta.dependencies[UNIT_AFTER], other) &&
1062 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1063 manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
1065 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i)
1066 if (!set_get(u->meta.dependencies[UNIT_AFTER], other) &&
1067 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1068 manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL);
1070 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i)
1071 if (!set_get(u->meta.dependencies[UNIT_AFTER], other) &&
1072 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
1073 manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL);
1075 SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i)
1076 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1077 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
1079 SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTED_BY], i)
1080 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1081 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
1084 static void retroactively_stop_dependencies(Unit *u) {
1089 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)));
1091 /* Pull down units which are bound to us recursively if enabled */
1092 SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i)
1093 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1094 manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL);
1096 /* Garbage collect services that might not be needed anymore, if enabled */
1097 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
1098 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1099 unit_check_unneeded(other);
1100 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1101 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1102 unit_check_unneeded(other);
1103 SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i)
1104 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1105 unit_check_unneeded(other);
1106 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i)
1107 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1108 unit_check_unneeded(other);
1109 SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
1110 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1111 unit_check_unneeded(other);
1112 SET_FOREACH(other, u->meta.dependencies[UNIT_BIND_TO], i)
1113 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
1114 unit_check_unneeded(other);
1117 void unit_trigger_on_failure(Unit *u) {
1123 if (set_size(u->meta.dependencies[UNIT_ON_FAILURE]) <= 0)
1126 log_info("Triggering OnFailure= dependencies of %s.", u->meta.id);
1128 SET_FOREACH(other, u->meta.dependencies[UNIT_ON_FAILURE], i) {
1131 if ((r = manager_add_job(u->meta.manager, JOB_START, other, u->meta.on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL)) < 0)
1132 log_error("Failed to enqueue OnFailure= job: %s", strerror(-r));
1136 void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) {
1140 assert(os < _UNIT_ACTIVE_STATE_MAX);
1141 assert(ns < _UNIT_ACTIVE_STATE_MAX);
1143 /* Note that this is called for all low-level state changes,
1144 * even if they might map to the same high-level
1145 * UnitActiveState! That means that ns == os is OK an expected
1146 * behaviour here. For example: if a mount point is remounted
1147 * this function will be called too! */
1149 if (u->meta.manager->n_reloading <= 0) {
1152 dual_timestamp_get(&ts);
1154 if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns))
1155 u->meta.inactive_exit_timestamp = ts;
1156 else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns))
1157 u->meta.inactive_enter_timestamp = ts;
1159 if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns))
1160 u->meta.active_enter_timestamp = ts;
1161 else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns))
1162 u->meta.active_exit_timestamp = ts;
1164 timer_unit_notify(u, ns);
1165 path_unit_notify(u, ns);
1168 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1169 cgroup_bonding_trim_list(u->meta.cgroup_bondings, true);
1174 if (u->meta.job->state == JOB_WAITING)
1176 /* So we reached a different state for this
1177 * job. Let's see if we can run it now if it
1178 * failed previously due to EAGAIN. */
1179 job_add_to_run_queue(u->meta.job);
1181 /* Let's check whether this state change constitutes a
1182 * finished job, or maybe contradicts a running job and
1183 * hence needs to invalidate jobs. */
1185 switch (u->meta.job->type) {
1188 case JOB_VERIFY_ACTIVE:
1190 if (UNIT_IS_ACTIVE_OR_RELOADING(ns))
1191 job_finish_and_invalidate(u->meta.job, JOB_DONE);
1192 else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) {
1195 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1196 job_finish_and_invalidate(u->meta.job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE);
1202 case JOB_RELOAD_OR_START:
1204 if (u->meta.job->state == JOB_RUNNING) {
1205 if (ns == UNIT_ACTIVE)
1206 job_finish_and_invalidate(u->meta.job, reload_success ? JOB_DONE : JOB_FAILED);
1207 else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) {
1210 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1211 job_finish_and_invalidate(u->meta.job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE);
1219 case JOB_TRY_RESTART:
1221 if (UNIT_IS_INACTIVE_OR_FAILED(ns))
1222 job_finish_and_invalidate(u->meta.job, JOB_DONE);
1223 else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) {
1225 job_finish_and_invalidate(u->meta.job, JOB_FAILED);
1231 assert_not_reached("Job type unknown");
1237 if (u->meta.manager->n_reloading <= 0) {
1239 /* If this state change happened without being
1240 * requested by a job, then let's retroactively start
1241 * or stop dependencies. We skip that step when
1242 * deserializing, since we don't want to create any
1243 * additional jobs just because something is already
1247 if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns))
1248 retroactively_start_dependencies(u);
1249 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
1250 retroactively_stop_dependencies(u);
1253 if (ns != os && ns == UNIT_FAILED) {
1254 log_notice("Unit %s entered failed state.", u->meta.id);
1255 unit_trigger_on_failure(u);
1259 /* Some names are special */
1260 if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
1262 if (unit_has_name(u, SPECIAL_DBUS_SERVICE))
1263 /* The bus just might have become available,
1264 * hence try to connect to it, if we aren't
1266 bus_init(u->meta.manager, true);
1268 if (u->meta.type == UNIT_SERVICE &&
1269 !UNIT_IS_ACTIVE_OR_RELOADING(os) &&
1270 u->meta.manager->n_reloading <= 0) {
1271 /* Write audit record if we have just finished starting up */
1272 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, true);
1273 u->meta.in_audit = true;
1276 if (!UNIT_IS_ACTIVE_OR_RELOADING(os))
1277 manager_send_unit_plymouth(u->meta.manager, u);
1281 /* We don't care about D-Bus here, since we'll get an
1282 * asynchronous notification for it anyway. */
1284 if (u->meta.type == UNIT_SERVICE &&
1285 UNIT_IS_INACTIVE_OR_FAILED(ns) &&
1286 !UNIT_IS_INACTIVE_OR_FAILED(os) &&
1287 u->meta.manager->n_reloading <= 0) {
1289 /* Hmm, if there was no start record written
1290 * write it now, so that we always have a nice
1292 if (!u->meta.in_audit) {
1293 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE);
1295 if (ns == UNIT_INACTIVE)
1296 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, true);
1298 /* Write audit record if we have just finished shutting down */
1299 manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE);
1301 u->meta.in_audit = false;
1305 manager_recheck_syslog(u->meta.manager);
1307 /* Maybe we finished startup and are now ready for being
1308 * stopped because unneeded? */
1309 unit_check_unneeded(u);
1311 unit_add_to_dbus_queue(u);
1312 unit_add_to_gc_queue(u);
1315 int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) {
1316 struct epoll_event ev;
1321 assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u));
1327 if (epoll_ctl(u->meta.manager->epoll_fd,
1328 w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD,
1340 void unit_unwatch_fd(Unit *u, Watch *w) {
1344 if (w->type == WATCH_INVALID)
1347 assert(w->type == WATCH_FD);
1348 assert(w->data.unit == u);
1349 assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
1352 w->type = WATCH_INVALID;
1353 w->data.unit = NULL;
1356 int unit_watch_pid(Unit *u, pid_t pid) {
1360 /* Watch a specific PID. We only support one unit watching
1361 * each PID for now. */
1363 return hashmap_put(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u);
1366 void unit_unwatch_pid(Unit *u, pid_t pid) {
1370 hashmap_remove_value(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u);
1373 int unit_watch_timer(Unit *u, usec_t delay, Watch *w) {
1374 struct itimerspec its;
1380 assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u));
1382 /* This will try to reuse the old timer if there is one */
1384 if (w->type == WATCH_UNIT_TIMER) {
1385 assert(w->data.unit == u);
1390 } else if (w->type == WATCH_INVALID) {
1393 if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
1396 assert_not_reached("Invalid watch type");
1401 /* Set absolute time in the past, but not 0, since we
1402 * don't want to disarm the timer */
1403 its.it_value.tv_sec = 0;
1404 its.it_value.tv_nsec = 1;
1406 flags = TFD_TIMER_ABSTIME;
1408 timespec_store(&its.it_value, delay);
1412 /* This will also flush the elapse counter */
1413 if (timerfd_settime(fd, flags, &its, NULL) < 0)
1416 if (w->type == WATCH_INVALID) {
1417 struct epoll_event ev;
1421 ev.events = EPOLLIN;
1423 if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0)
1427 w->type = WATCH_UNIT_TIMER;
1435 close_nointr_nofail(fd);
1440 void unit_unwatch_timer(Unit *u, Watch *w) {
1444 if (w->type == WATCH_INVALID)
1447 assert(w->type == WATCH_UNIT_TIMER);
1448 assert(w->data.unit == u);
1451 assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
1452 close_nointr_nofail(w->fd);
1455 w->type = WATCH_INVALID;
1456 w->data.unit = NULL;
1459 bool unit_job_is_applicable(Unit *u, JobType j) {
1461 assert(j >= 0 && j < _JOB_TYPE_MAX);
1465 case JOB_VERIFY_ACTIVE:
1471 case JOB_TRY_RESTART:
1472 return unit_can_start(u);
1475 return unit_can_reload(u);
1477 case JOB_RELOAD_OR_START:
1478 return unit_can_reload(u) && unit_can_start(u);
1481 assert_not_reached("Invalid job type");
1485 int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) {
1487 static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = {
1488 [UNIT_REQUIRES] = UNIT_REQUIRED_BY,
1489 [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
1490 [UNIT_WANTS] = UNIT_WANTED_BY,
1491 [UNIT_REQUISITE] = UNIT_REQUIRED_BY,
1492 [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE,
1493 [UNIT_BIND_TO] = UNIT_BOUND_BY,
1494 [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID,
1495 [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID,
1496 [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID,
1497 [UNIT_BOUND_BY] = UNIT_BIND_TO,
1498 [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY,
1499 [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS,
1500 [UNIT_BEFORE] = UNIT_AFTER,
1501 [UNIT_AFTER] = UNIT_BEFORE,
1502 [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID,
1503 [UNIT_REFERENCES] = UNIT_REFERENCED_BY,
1504 [UNIT_REFERENCED_BY] = UNIT_REFERENCES
1506 int r, q = 0, v = 0, w = 0;
1509 assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX);
1512 u = unit_follow_merge(u);
1513 other = unit_follow_merge(other);
1515 /* We won't allow dependencies on ourselves. We will not
1516 * consider them an error however. */
1520 if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0)
1523 if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
1524 if ((r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0)
1528 if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 ||
1529 (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0)
1532 if ((q = set_put(u->meta.dependencies[d], other)) < 0)
1535 if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID)
1536 if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) {
1541 if (add_reference) {
1542 if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) {
1547 if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0)
1551 unit_add_to_dbus_queue(u);
1556 set_remove(u->meta.dependencies[d], other);
1559 set_remove(other->meta.dependencies[inverse_table[d]], u);
1562 set_remove(u->meta.dependencies[UNIT_REFERENCES], other);
1567 int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) {
1572 if ((r = unit_add_dependency(u, d, other, add_reference)) < 0)
1575 if ((r = unit_add_dependency(u, e, other, add_reference)) < 0)
1581 static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) {
1585 assert(name || path);
1588 name = file_name_from_path(path);
1590 if (!unit_name_is_template(name)) {
1595 if (u->meta.instance)
1596 s = unit_name_replace_instance(name, u->meta.instance);
1600 if (!(i = unit_name_to_prefix(u->meta.id)))
1603 s = unit_name_replace_instance(name, i);
1614 int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
1620 assert(name || path);
1622 if (!(name = resolve_template(u, name, path, &s)))
1625 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1628 r = unit_add_dependency(u, d, other, add_reference);
1635 int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
1641 assert(name || path);
1643 if (!(name = resolve_template(u, name, path, &s)))
1646 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1649 r = unit_add_two_dependencies(u, d, e, other, add_reference);
1656 int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
1662 assert(name || path);
1664 if (!(name = resolve_template(u, name, path, &s)))
1667 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1670 r = unit_add_dependency(other, d, u, add_reference);
1677 int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
1683 assert(name || path);
1685 if (!(name = resolve_template(u, name, path, &s)))
1688 if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0)
1691 if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0)
1699 int set_unit_path(const char *p) {
1703 /* This is mostly for debug purposes */
1705 if (path_is_absolute(p)) {
1706 if (!(c = strdup(p)))
1709 if (!(cwd = get_current_dir_name()))
1712 r = asprintf(&c, "%s/%s", cwd, p);
1719 if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) {
1728 char *unit_dbus_path(Unit *u) {
1736 if (!(e = bus_path_escape(u->meta.id)))
1739 p = strappend("/org/freedesktop/systemd1/unit/", e);
1745 int unit_add_cgroup(Unit *u, CGroupBonding *b) {
1753 if (!b->controller) {
1754 if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER)))
1760 /* Ensure this hasn't been added yet */
1763 if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) {
1766 l = hashmap_get(u->meta.manager->cgroup_bondings, b->path);
1767 LIST_PREPEND(CGroupBonding, by_path, l, b);
1769 if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) {
1770 LIST_REMOVE(CGroupBonding, by_path, l, b);
1775 LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b);
1781 static char *default_cgroup_path(Unit *u) {
1786 if (u->meta.instance) {
1789 t = unit_name_template(u->meta.id);
1793 p = join(u->meta.manager->cgroup_hierarchy, "/", t, "/", u->meta.instance, NULL);
1796 p = join(u->meta.manager->cgroup_hierarchy, "/", u->meta.id, NULL);
1801 int unit_add_cgroup_from_text(Unit *u, const char *name) {
1802 char *controller = NULL, *path = NULL;
1803 CGroupBonding *b = NULL;
1810 if ((r = cg_split_spec(name, &controller, &path)) < 0)
1814 path = default_cgroup_path(u);
1819 controller = strdup(SYSTEMD_CGROUP_CONTROLLER);
1823 if (!path || !controller) {
1830 if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) {
1835 if (!(b = new0(CGroupBonding, 1))) {
1840 b->controller = controller;
1843 b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER);
1845 if ((r = unit_add_cgroup(u, b)) < 0)
1858 static int unit_add_one_default_cgroup(Unit *u, const char *controller) {
1859 CGroupBonding *b = NULL;
1865 controller = SYSTEMD_CGROUP_CONTROLLER;
1867 if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller))
1870 if (!(b = new0(CGroupBonding, 1)))
1873 if (!(b->controller = strdup(controller)))
1876 if (!(b->path = default_cgroup_path(u)))
1880 b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER);
1882 if ((r = unit_add_cgroup(u, b)) < 0)
1889 free(b->controller);
1895 int unit_add_default_cgroups(Unit *u) {
1902 /* Adds in the default cgroups, if they weren't specified
1905 if (!u->meta.manager->cgroup_hierarchy)
1908 if ((r = unit_add_one_default_cgroup(u, NULL)) < 0)
1911 STRV_FOREACH(c, u->meta.manager->default_controllers)
1912 unit_add_one_default_cgroup(u, *c);
1914 LIST_FOREACH(by_unit, a, u->meta.cgroup_attributes)
1915 unit_add_one_default_cgroup(u, a->controller);
1920 CGroupBonding* unit_get_default_cgroup(Unit *u) {
1923 return cgroup_bonding_find_list(u->meta.cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER);
1926 int unit_add_cgroup_attribute(Unit *u, const char *controller, const char *name, const char *value, CGroupAttributeMapCallback map_callback) {
1938 dot = strchr(name, '.');
1942 c = strndup(name, dot - name);
1949 if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)) {
1954 a = new0(CGroupAttribute, 1);
1964 a->controller = strdup(controller);
1966 a->name = strdup(name);
1967 a->value = strdup(value);
1969 if (!a->controller || !a->name || !a->value) {
1970 free(a->controller);
1978 a->map_callback = map_callback;
1980 LIST_PREPEND(CGroupAttribute, by_unit, u->meta.cgroup_attributes, a);
1989 int unit_load_related_unit(Unit *u, const char *type, Unit **_found) {
1997 if (!(t = unit_name_change_suffix(u->meta.id, type)))
2000 assert(!unit_has_name(u, t));
2002 r = manager_load_unit(u->meta.manager, t, NULL, NULL, _found);
2005 assert(r < 0 || *_found != u);
2010 int unit_get_related_unit(Unit *u, const char *type, Unit **_found) {
2018 if (!(t = unit_name_change_suffix(u->meta.id, type)))
2021 assert(!unit_has_name(u, t));
2023 found = manager_get_unit(u->meta.manager, t);
2033 static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) {
2037 return unit_name_to_prefix_and_instance(u->meta.id);
2040 static char *specifier_prefix(char specifier, void *data, void *userdata) {
2044 return unit_name_to_prefix(u->meta.id);
2047 static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) {
2053 if (!(p = unit_name_to_prefix(u->meta.id)))
2056 r = unit_name_unescape(p);
2062 static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) {
2066 if (u->meta.instance)
2067 return unit_name_unescape(u->meta.instance);
2072 static char *specifier_filename(char specifier, void *data, void *userdata) {
2076 if (u->meta.instance)
2077 return unit_name_path_unescape(u->meta.instance);
2079 return unit_name_to_path(u->meta.instance);
2082 static char *specifier_cgroup(char specifier, void *data, void *userdata) {
2086 return default_cgroup_path(u);
2089 static char *specifier_cgroup_root(char specifier, void *data, void *userdata) {
2094 if (specifier == 'r')
2095 return strdup(u->meta.manager->cgroup_hierarchy);
2097 if (parent_of_path(u->meta.manager->cgroup_hierarchy, &p) < 0)
2100 if (streq(p, "/")) {
2108 static char *specifier_runtime(char specifier, void *data, void *userdata) {
2112 if (u->meta.manager->running_as == MANAGER_USER) {
2115 e = getenv("XDG_RUNTIME_DIR");
2120 return strdup("/run");
2123 char *unit_name_printf(Unit *u, const char* format) {
2126 * This will use the passed string as format string and
2127 * replace the following specifiers:
2129 * %n: the full id of the unit (foo@bar.waldo)
2130 * %N: the id of the unit without the suffix (foo@bar)
2131 * %p: the prefix (foo)
2132 * %i: the instance (bar)
2135 const Specifier table[] = {
2136 { 'n', specifier_string, u->meta.id },
2137 { 'N', specifier_prefix_and_instance, NULL },
2138 { 'p', specifier_prefix, NULL },
2139 { 'i', specifier_string, u->meta.instance },
2146 return specifier_printf(format, table, u);
2149 char *unit_full_printf(Unit *u, const char *format) {
2151 /* This is similar to unit_name_printf() but also supports
2152 * unescaping. Also, adds a couple of additional codes:
2154 * %c cgroup path of unit
2155 * %r root cgroup path of this systemd instance (e.g. "/user/lennart/shared/systemd-4711")
2156 * %R parent of root cgroup path (e.g. "/usr/lennart/shared")
2157 * %t the runtime directory to place sockets in (e.g. "/run" or $XDG_RUNTIME_DIR)
2160 const Specifier table[] = {
2161 { 'n', specifier_string, u->meta.id },
2162 { 'N', specifier_prefix_and_instance, NULL },
2163 { 'p', specifier_prefix, NULL },
2164 { 'P', specifier_prefix_unescaped, NULL },
2165 { 'i', specifier_string, u->meta.instance },
2166 { 'I', specifier_instance_unescaped, NULL },
2167 { 'f', specifier_filename, NULL },
2168 { 'c', specifier_cgroup, NULL },
2169 { 'r', specifier_cgroup_root, NULL },
2170 { 'R', specifier_cgroup_root, NULL },
2171 { 't', specifier_runtime, NULL },
2178 return specifier_printf(format, table, u);
2181 char **unit_full_printf_strv(Unit *u, char **l) {
2185 /* Applies unit_full_printf to every entry in l */
2190 if (!(r = new(char*, n+1)))
2193 for (i = l, j = r; *i; i++, j++)
2194 if (!(*j = unit_full_printf(u, *i)))
2201 for (j--; j >= r; j--)
2209 int unit_watch_bus_name(Unit *u, const char *name) {
2213 /* Watch a specific name on the bus. We only support one unit
2214 * watching each name for now. */
2216 return hashmap_put(u->meta.manager->watch_bus, name, u);
2219 void unit_unwatch_bus_name(Unit *u, const char *name) {
2223 hashmap_remove_value(u->meta.manager->watch_bus, name, u);
2226 bool unit_can_serialize(Unit *u) {
2229 return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item;
2232 int unit_serialize(Unit *u, FILE *f, FDSet *fds) {
2239 if (!unit_can_serialize(u))
2242 if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0)
2246 unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type));
2248 dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->meta.inactive_exit_timestamp);
2249 dual_timestamp_serialize(f, "active-enter-timestamp", &u->meta.active_enter_timestamp);
2250 dual_timestamp_serialize(f, "active-exit-timestamp", &u->meta.active_exit_timestamp);
2251 dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->meta.inactive_enter_timestamp);
2252 dual_timestamp_serialize(f, "condition-timestamp", &u->meta.condition_timestamp);
2254 if (dual_timestamp_is_set(&u->meta.condition_timestamp))
2255 unit_serialize_item(u, f, "condition-result", yes_no(u->meta.condition_result));
2262 void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) {
2273 va_start(ap, format);
2274 vfprintf(f, format, ap);
2280 void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) {
2286 fprintf(f, "%s=%s\n", key, value);
2289 int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
2296 if (!unit_can_serialize(u))
2300 char line[LINE_MAX], *l, *v;
2303 if (!fgets(line, sizeof(line), f)) {
2316 k = strcspn(l, "=");
2324 if (streq(l, "job")) {
2327 if ((type = job_type_from_string(v)) < 0)
2328 log_debug("Failed to parse job type value %s", v);
2330 u->meta.deserialized_job = type;
2333 } else if (streq(l, "inactive-exit-timestamp")) {
2334 dual_timestamp_deserialize(v, &u->meta.inactive_exit_timestamp);
2336 } else if (streq(l, "active-enter-timestamp")) {
2337 dual_timestamp_deserialize(v, &u->meta.active_enter_timestamp);
2339 } else if (streq(l, "active-exit-timestamp")) {
2340 dual_timestamp_deserialize(v, &u->meta.active_exit_timestamp);
2342 } else if (streq(l, "inactive-enter-timestamp")) {
2343 dual_timestamp_deserialize(v, &u->meta.inactive_enter_timestamp);
2345 } else if (streq(l, "condition-timestamp")) {
2346 dual_timestamp_deserialize(v, &u->meta.condition_timestamp);
2348 } else if (streq(l, "condition-result")) {
2351 if ((b = parse_boolean(v)) < 0)
2352 log_debug("Failed to parse condition result value %s", v);
2354 u->meta.condition_result = b;
2359 if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0)
2364 int unit_add_node_link(Unit *u, const char *what, bool wants) {
2374 /* Adds in links to the device node that this unit is based on */
2376 if (!is_device_path(what))
2379 if (!(e = unit_name_build_escape(what+1, NULL, ".device")))
2382 r = manager_load_unit(u->meta.manager, e, NULL, NULL, &device);
2388 if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BIND_TO, device, true)) < 0)
2392 if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0)
2398 int unit_coldplug(Unit *u) {
2403 if (UNIT_VTABLE(u)->coldplug)
2404 if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0)
2407 if (u->meta.deserialized_job >= 0) {
2408 if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL)) < 0)
2411 u->meta.deserialized_job = _JOB_TYPE_INVALID;
2417 void unit_status_printf(Unit *u, const char *format, ...) {
2423 if (!UNIT_VTABLE(u)->show_status)
2426 if (u->meta.manager->running_as != MANAGER_SYSTEM)
2429 /* If Plymouth is running make sure we show the status, so
2430 * that there's something nice to see when people press Esc */
2432 if (!u->meta.manager->show_status && !plymouth_running())
2435 if (!manager_is_booting_or_shutting_down(u->meta.manager))
2438 va_start(ap, format);
2439 status_vprintf(format, ap);
2443 bool unit_need_daemon_reload(Unit *u) {
2446 if (u->meta.fragment_path) {
2450 if (stat(u->meta.fragment_path, &st) < 0)
2451 /* What, cannot access this anymore? */
2454 if (u->meta.fragment_mtime > 0 &&
2455 timespec_load(&st.st_mtim) != u->meta.fragment_mtime)
2459 if (UNIT_VTABLE(u)->need_daemon_reload)
2460 return UNIT_VTABLE(u)->need_daemon_reload(u);
2465 void unit_reset_failed(Unit *u) {
2468 if (UNIT_VTABLE(u)->reset_failed)
2469 UNIT_VTABLE(u)->reset_failed(u);
2472 Unit *unit_following(Unit *u) {
2475 if (UNIT_VTABLE(u)->following)
2476 return UNIT_VTABLE(u)->following(u);
2481 bool unit_pending_inactive(Unit *u) {
2484 /* Returns true if the unit is inactive or going down */
2486 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)))
2489 if (u->meta.job && u->meta.job->type == JOB_STOP)
2495 bool unit_pending_active(Unit *u) {
2498 /* Returns true if the unit is inactive or going down */
2500 if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
2504 (u->meta.job->type == JOB_START ||
2505 u->meta.job->type == JOB_RELOAD_OR_START ||
2506 u->meta.job->type == JOB_RESTART))
2512 UnitType unit_name_to_type(const char *n) {
2517 for (t = 0; t < _UNIT_TYPE_MAX; t++)
2518 if (endswith(n, unit_vtable[t]->suffix))
2521 return _UNIT_TYPE_INVALID;
2524 bool unit_name_is_valid(const char *n, bool template_ok) {
2527 t = unit_name_to_type(n);
2528 if (t < 0 || t >= _UNIT_TYPE_MAX)
2531 return unit_name_is_valid_no_type(n, template_ok);
2534 int unit_kill(Unit *u, KillWho w, KillMode m, int signo, DBusError *error) {
2536 assert(w >= 0 && w < _KILL_WHO_MAX);
2537 assert(m >= 0 && m < _KILL_MODE_MAX);
2539 assert(signo < _NSIG);
2544 if (!UNIT_VTABLE(u)->kill)
2547 return UNIT_VTABLE(u)->kill(u, w, m, signo, error);
2550 int unit_following_set(Unit *u, Set **s) {
2554 if (UNIT_VTABLE(u)->following_set)
2555 return UNIT_VTABLE(u)->following_set(u, s);
2561 UnitFileState unit_get_unit_file_state(Unit *u) {
2564 if (u->meta.unit_file_state < 0 && u->meta.fragment_path)
2565 u->meta.unit_file_state = unit_file_get_state(
2566 u->meta.manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER,
2567 NULL, file_name_from_path(u->meta.fragment_path));
2569 return u->meta.unit_file_state;
2572 static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
2573 [UNIT_STUB] = "stub",
2574 [UNIT_LOADED] = "loaded",
2575 [UNIT_ERROR] = "error",
2576 [UNIT_MERGED] = "merged",
2577 [UNIT_MASKED] = "masked"
2580 DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState);
2582 static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = {
2583 [UNIT_ACTIVE] = "active",
2584 [UNIT_RELOADING] = "reloading",
2585 [UNIT_INACTIVE] = "inactive",
2586 [UNIT_FAILED] = "failed",
2587 [UNIT_ACTIVATING] = "activating",
2588 [UNIT_DEACTIVATING] = "deactivating"
2591 DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState);
2593 static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = {
2594 [UNIT_REQUIRES] = "Requires",
2595 [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable",
2596 [UNIT_WANTS] = "Wants",
2597 [UNIT_REQUISITE] = "Requisite",
2598 [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable",
2599 [UNIT_REQUIRED_BY] = "RequiredBy",
2600 [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable",
2601 [UNIT_BIND_TO] = "BindTo",
2602 [UNIT_WANTED_BY] = "WantedBy",
2603 [UNIT_CONFLICTS] = "Conflicts",
2604 [UNIT_CONFLICTED_BY] = "ConflictedBy",
2605 [UNIT_BOUND_BY] = "BoundBy",
2606 [UNIT_BEFORE] = "Before",
2607 [UNIT_AFTER] = "After",
2608 [UNIT_REFERENCES] = "References",
2609 [UNIT_REFERENCED_BY] = "ReferencedBy",
2610 [UNIT_ON_FAILURE] = "OnFailure"
2613 DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency);