1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
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>
27 #include <sys/signalfd.h>
32 #include <sys/reboot.h>
33 #include <sys/ioctl.h>
35 #include <libcgroup.h>
38 #include <sys/types.h>
47 #include "ratelimit.h"
49 #include "mount-setup.h"
50 #include "utmp-wtmp.h"
51 #include "unit-name.h"
52 #include "dbus-unit.h"
56 /* As soon as 16 units are in our GC queue, make sure to run a gc sweep */
57 #define GC_QUEUE_ENTRIES_MAX 16
59 /* As soon as 5s passed since a unit was added to our GC queue, make sure to run a gc sweep */
60 #define GC_QUEUE_USEC_MAX (5*USEC_PER_SEC)
62 static int enable_special_signals(Manager *m) {
67 /* Enable that we get SIGINT on control-alt-del */
68 if (reboot(RB_DISABLE_CAD) < 0)
69 log_warning("Failed to enable ctrl-alt-del handling: %m");
71 if ((fd = open_terminal("/dev/tty0", O_RDWR)) < 0)
72 log_warning("Failed to open /dev/tty0: %m");
74 /* Enable that we get SIGWINCH on kbrequest */
75 if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
76 log_warning("Failed to enable kbrequest handling: %s", strerror(errno));
78 close_nointr_nofail(fd);
84 static int manager_setup_signals(Manager *m) {
86 struct epoll_event ev;
91 /* We are not interested in SIGSTOP and friends. */
93 sa.sa_handler = SIG_DFL;
94 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
95 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
97 assert_se(sigemptyset(&mask) == 0);
98 assert_se(sigaddset(&mask, SIGCHLD) == 0);
99 assert_se(sigaddset(&mask, SIGTERM) == 0);
100 assert_se(sigaddset(&mask, SIGHUP) == 0);
101 assert_se(sigaddset(&mask, SIGUSR1) == 0);
102 assert_se(sigaddset(&mask, SIGUSR2) == 0);
103 assert_se(sigaddset(&mask, SIGINT) == 0); /* Kernel sends us this on control-alt-del */
104 assert_se(sigaddset(&mask, SIGWINCH) == 0); /* Kernel sends us this on kbrequest (alt-arrowup) */
105 assert_se(sigaddset(&mask, SIGPWR) == 0); /* Some kernel drivers and upsd send us this on power failure */
106 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
108 m->signal_watch.type = WATCH_SIGNAL;
109 if ((m->signal_watch.fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC)) < 0)
114 ev.data.ptr = &m->signal_watch;
116 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->signal_watch.fd, &ev) < 0)
119 if (m->running_as == MANAGER_INIT)
120 return enable_special_signals(m);
125 static char** session_dirs(void) {
126 const char *home, *e;
127 char *config_home = NULL, *data_home = NULL;
128 char **config_dirs = NULL, **data_dirs = NULL;
129 char **r = NULL, **t;
131 /* Implement the mechanisms defined in
133 * http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
135 * We look in both the config and the data dirs because we
136 * want to encourage that distributors ship their unit files
137 * as data, and allow overriding as configuration.
140 home = getenv("HOME");
142 if ((e = getenv("XDG_CONFIG_HOME"))) {
143 if (asprintf(&config_home, "%s/systemd/session", e) < 0)
147 if (asprintf(&config_home, "%s/.config/systemd/session", home) < 0)
151 if ((e = getenv("XDG_CONFIG_DIRS")))
152 config_dirs = strv_split(e, ":");
154 config_dirs = strv_new("/etc/xdg", NULL);
159 if ((e = getenv("XDG_DATA_HOME"))) {
160 if (asprintf(&data_home, "%s/systemd/session", e) < 0)
164 if (asprintf(&data_home, "%s/.local/share/systemd/session", home) < 0)
168 if ((e = getenv("XDG_DATA_DIRS")))
169 data_dirs = strv_split(e, ":");
171 data_dirs = strv_new("/usr/local/share", "/usr/share", NULL);
176 /* Now merge everything we found. */
178 if (!(t = strv_append(r, config_home)))
184 if (!(t = strv_merge_concat(r, config_dirs, "/systemd/session")))
189 if (!(t = strv_append(r, SESSION_CONFIG_UNIT_PATH)))
195 if (!(t = strv_append(r, data_home)))
201 if (!(t = strv_merge_concat(r, data_dirs, "/systemd/session")))
206 if (!(t = strv_append(r, SESSION_DATA_UNIT_PATH)))
211 if (!strv_path_make_absolute_cwd(r))
216 strv_free(config_dirs);
218 strv_free(data_dirs);
228 static int manager_find_paths(Manager *m) {
234 /* First priority is whatever has been passed to us via env
236 if ((e = getenv("SYSTEMD_UNIT_PATH")))
237 if (!(m->unit_path = split_path_and_make_absolute(e)))
240 if (strv_isempty(m->unit_path)) {
242 /* Nothing is set, so let's figure something out. */
243 strv_free(m->unit_path);
245 if (m->running_as == MANAGER_SESSION) {
246 if (!(m->unit_path = session_dirs()))
249 if (!(m->unit_path = strv_new(
250 SYSTEM_CONFIG_UNIT_PATH, /* /etc/systemd/system/ */
251 SYSTEM_DATA_UNIT_PATH, /* /lib/systemd/system/ */
256 if (m->running_as == MANAGER_INIT) {
257 /* /etc/init.d/ compativility does not matter to users */
259 if ((e = getenv("SYSTEMD_SYSVINIT_PATH")))
260 if (!(m->sysvinit_path = split_path_and_make_absolute(e)))
263 if (strv_isempty(m->sysvinit_path)) {
264 strv_free(m->sysvinit_path);
266 if (!(m->sysvinit_path = strv_new(
267 SYSTEM_SYSVINIT_PATH, /* /etc/init.d/ */
272 if ((e = getenv("SYSTEMD_SYSVRCND_PATH")))
273 if (!(m->sysvrcnd_path = split_path_and_make_absolute(e)))
276 if (strv_isempty(m->sysvrcnd_path)) {
277 strv_free(m->sysvrcnd_path);
279 if (!(m->sysvrcnd_path = strv_new(
280 SYSTEM_SYSVRCND_PATH, /* /etc/rcN.d/ */
286 strv_uniq(m->unit_path);
287 strv_uniq(m->sysvinit_path);
288 strv_uniq(m->sysvrcnd_path);
290 assert(!strv_isempty(m->unit_path));
291 if (!(t = strv_join(m->unit_path, "\n\t")))
293 log_debug("Looking for unit files in:\n\t%s", t);
296 if (!strv_isempty(m->sysvinit_path)) {
298 if (!(t = strv_join(m->sysvinit_path, "\n\t")))
301 log_debug("Looking for SysV init scripts in:\n\t%s", t);
304 log_debug("Ignoring SysV init scripts.");
306 if (!strv_isempty(m->sysvrcnd_path)) {
308 if (!(t = strv_join(m->sysvrcnd_path, "\n\t")))
311 log_debug("Looking for SysV rcN.d links in:\n\t%s", t);
314 log_debug("Ignoring SysV rcN.d links.");
319 int manager_new(ManagerRunningAs running_as, bool confirm_spawn, Manager **_m) {
324 assert(running_as >= 0);
325 assert(running_as < _MANAGER_RUNNING_AS_MAX);
327 if (!(m = new0(Manager, 1)))
330 m->boot_timestamp = now(CLOCK_REALTIME);
332 m->running_as = running_as;
333 m->confirm_spawn = confirm_spawn;
334 m->name_data_slot = -1;
335 m->exit_code = _MANAGER_EXIT_CODE_INVALID;
337 m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = m->dev_autofs_fd = -1;
338 m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
340 if (!(m->environment = strv_copy(environ)))
343 if (!(m->units = hashmap_new(string_hash_func, string_compare_func)))
346 if (!(m->jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))
349 if (!(m->transaction_jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))
352 if (!(m->watch_pids = hashmap_new(trivial_hash_func, trivial_compare_func)))
355 if (!(m->cgroup_bondings = hashmap_new(string_hash_func, string_compare_func)))
358 if (!(m->watch_bus = hashmap_new(string_hash_func, string_compare_func)))
361 if ((m->epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0)
364 if ((r = manager_find_paths(m)) < 0)
367 if ((r = manager_setup_signals(m)) < 0)
370 if ((r = manager_setup_cgroup(m)) < 0)
373 /* Try to connect to the busses, if possible. */
374 if ((r = bus_init_system(m)) < 0 ||
375 (r = bus_init_api(m)) < 0)
386 static unsigned manager_dispatch_cleanup_queue(Manager *m) {
392 while ((meta = m->cleanup_queue)) {
393 assert(meta->in_cleanup_queue);
395 unit_free(UNIT(meta));
403 GC_OFFSET_IN_PATH, /* This one is on the path we were travelling */
404 GC_OFFSET_UNSURE, /* No clue */
405 GC_OFFSET_GOOD, /* We still need this unit */
406 GC_OFFSET_BAD, /* We don't need this unit anymore */
410 static void unit_gc_sweep(Unit *u, unsigned gc_marker) {
417 if (u->meta.gc_marker == gc_marker + GC_OFFSET_GOOD ||
418 u->meta.gc_marker == gc_marker + GC_OFFSET_BAD ||
419 u->meta.gc_marker == gc_marker + GC_OFFSET_IN_PATH)
422 if (u->meta.in_cleanup_queue)
425 if (unit_check_gc(u))
428 u->meta.gc_marker = gc_marker + GC_OFFSET_IN_PATH;
432 SET_FOREACH(other, u->meta.dependencies[UNIT_REFERENCED_BY], i) {
433 unit_gc_sweep(other, gc_marker);
435 if (other->meta.gc_marker == gc_marker + GC_OFFSET_GOOD)
438 if (other->meta.gc_marker != gc_marker + GC_OFFSET_BAD)
445 /* We were unable to find anything out about this entry, so
446 * let's investigate it later */
447 u->meta.gc_marker = gc_marker + GC_OFFSET_UNSURE;
448 unit_add_to_gc_queue(u);
452 /* We definitely know that this one is not useful anymore, so
453 * let's mark it for deletion */
454 u->meta.gc_marker = gc_marker + GC_OFFSET_BAD;
455 unit_add_to_cleanup_queue(u);
459 u->meta.gc_marker = gc_marker + GC_OFFSET_GOOD;
462 static unsigned manager_dispatch_gc_queue(Manager *m) {
469 if ((m->n_in_gc_queue < GC_QUEUE_ENTRIES_MAX) &&
470 (m->gc_queue_timestamp <= 0 ||
471 (m->gc_queue_timestamp + GC_QUEUE_USEC_MAX) > now(CLOCK_MONOTONIC)))
474 log_debug("Running GC...");
476 m->gc_marker += _GC_OFFSET_MAX;
477 if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX)
480 gc_marker = m->gc_marker;
482 while ((meta = m->gc_queue)) {
483 assert(meta->in_gc_queue);
485 unit_gc_sweep(UNIT(meta), gc_marker);
487 LIST_REMOVE(Meta, gc_queue, m->gc_queue, meta);
488 meta->in_gc_queue = false;
492 if (meta->gc_marker == gc_marker + GC_OFFSET_BAD ||
493 meta->gc_marker == gc_marker + GC_OFFSET_UNSURE) {
494 log_debug("Collecting %s", meta->id);
495 meta->gc_marker = gc_marker + GC_OFFSET_BAD;
496 unit_add_to_cleanup_queue(UNIT(meta));
500 m->n_in_gc_queue = 0;
501 m->gc_queue_timestamp = 0;
506 static void manager_clear_jobs_and_units(Manager *m) {
512 while ((j = hashmap_first(m->transaction_jobs)))
515 while ((u = hashmap_first(m->units)))
519 void manager_free(Manager *m) {
524 manager_clear_jobs_and_units(m);
526 for (c = 0; c < _UNIT_TYPE_MAX; c++)
527 if (unit_vtable[c]->shutdown)
528 unit_vtable[c]->shutdown(m);
530 /* If we reexecute ourselves, we keep the root cgroup
532 manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE);
537 hashmap_free(m->units);
538 hashmap_free(m->jobs);
539 hashmap_free(m->transaction_jobs);
540 hashmap_free(m->watch_pids);
541 hashmap_free(m->watch_bus);
543 if (m->epoll_fd >= 0)
544 close_nointr_nofail(m->epoll_fd);
545 if (m->signal_watch.fd >= 0)
546 close_nointr_nofail(m->signal_watch.fd);
548 strv_free(m->unit_path);
549 strv_free(m->sysvinit_path);
550 strv_free(m->sysvrcnd_path);
551 strv_free(m->environment);
553 free(m->cgroup_controller);
554 free(m->cgroup_hierarchy);
556 hashmap_free(m->cgroup_bondings);
561 int manager_enumerate(Manager *m) {
567 /* Let's ask every type to load all units from disk/kernel
568 * that it might know */
569 for (c = 0; c < _UNIT_TYPE_MAX; c++)
570 if (unit_vtable[c]->enumerate)
571 if ((q = unit_vtable[c]->enumerate(m)) < 0)
574 manager_dispatch_load_queue(m);
578 int manager_coldplug(Manager *m) {
586 /* Then, let's set up their initial state. */
587 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
593 if (UNIT_VTABLE(u)->coldplug)
594 if ((q = UNIT_VTABLE(u)->coldplug(u)) < 0)
601 int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {
606 /* First, enumerate what we can from all config files */
607 r = manager_enumerate(m);
609 /* Second, deserialize if there is something to deserialize */
611 if ((q = manager_deserialize(m, serialization, fds)) < 0)
614 /* Third, fire things up! */
615 if ((q = manager_coldplug(m)) < 0)
618 /* Now that the initial devices are available, let's see if we
619 * can write the utmp file */
620 manager_write_utmp_reboot(m);
625 static void transaction_delete_job(Manager *m, Job *j, bool delete_dependencies) {
629 /* Deletes one job from the transaction */
631 manager_transaction_unlink_job(m, j, delete_dependencies);
637 static void transaction_delete_unit(Manager *m, Unit *u) {
640 /* Deletes all jobs associated with a certain unit from the
643 while ((j = hashmap_get(m->transaction_jobs, u)))
644 transaction_delete_job(m, j, true);
647 static void transaction_clean_dependencies(Manager *m) {
653 /* Drops all dependencies of all installed jobs */
655 HASHMAP_FOREACH(j, m->jobs, i) {
656 while (j->subject_list)
657 job_dependency_free(j->subject_list);
658 while (j->object_list)
659 job_dependency_free(j->object_list);
662 assert(!m->transaction_anchor);
665 static void transaction_abort(Manager *m) {
670 while ((j = hashmap_first(m->transaction_jobs)))
672 transaction_delete_job(m, j, true);
676 assert(hashmap_isempty(m->transaction_jobs));
678 transaction_clean_dependencies(m);
681 static void transaction_find_jobs_that_matter_to_anchor(Manager *m, Job *j, unsigned generation) {
686 /* A recursive sweep through the graph that marks all units
687 * that matter to the anchor job, i.e. are directly or
688 * indirectly a dependency of the anchor job via paths that
689 * are fully marked as mattering. */
694 l = m->transaction_anchor;
696 LIST_FOREACH(subject, l, l) {
698 /* This link does not matter */
702 /* This unit has already been marked */
703 if (l->object->generation == generation)
706 l->object->matters_to_anchor = true;
707 l->object->generation = generation;
709 transaction_find_jobs_that_matter_to_anchor(m, l->object, generation);
713 static void transaction_merge_and_delete_job(Manager *m, Job *j, Job *other, JobType t) {
714 JobDependency *l, *last;
718 assert(j->unit == other->unit);
719 assert(!j->installed);
721 /* Merges 'other' into 'j' and then deletes j. */
724 j->state = JOB_WAITING;
725 j->override = j->override || other->override;
727 j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor;
729 /* Patch us in as new owner of the JobDependency objects */
731 LIST_FOREACH(subject, l, other->subject_list) {
732 assert(l->subject == other);
737 /* Merge both lists */
739 last->subject_next = j->subject_list;
741 j->subject_list->subject_prev = last;
742 j->subject_list = other->subject_list;
745 /* Patch us in as new owner of the JobDependency objects */
747 LIST_FOREACH(object, l, other->object_list) {
748 assert(l->object == other);
753 /* Merge both lists */
755 last->object_next = j->object_list;
757 j->object_list->object_prev = last;
758 j->object_list = other->object_list;
761 /* Kill the other job */
762 other->subject_list = NULL;
763 other->object_list = NULL;
764 transaction_delete_job(m, other, true);
767 static int delete_one_unmergeable_job(Manager *m, Job *j) {
772 /* Tries to delete one item in the linked list
773 * j->transaction_next->transaction_next->... that conflicts
774 * whith another one, in an attempt to make an inconsistent
775 * transaction work. */
777 /* We rely here on the fact that if a merged with b does not
778 * merge with c, either a or b merge with c neither */
779 LIST_FOREACH(transaction, j, j)
780 LIST_FOREACH(transaction, k, j->transaction_next) {
783 /* Is this one mergeable? Then skip it */
784 if (job_type_is_mergeable(j->type, k->type))
787 /* Ok, we found two that conflict, let's see if we can
788 * drop one of them */
789 if (!j->matters_to_anchor)
791 else if (!k->matters_to_anchor)
796 /* Ok, we can drop one, so let's do so. */
797 log_debug("Trying to fix job merging by deleting job %s/%s", d->unit->meta.id, job_type_to_string(d->type));
798 transaction_delete_job(m, d, true);
805 static int transaction_merge_jobs(Manager *m) {
812 /* First step, check whether any of the jobs for one specific
813 * task conflict. If so, try to drop one of them. */
814 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
819 LIST_FOREACH(transaction, k, j->transaction_next) {
820 if ((r = job_type_merge(&t, k->type)) >= 0)
823 /* OK, we could not merge all jobs for this
824 * action. Let's see if we can get rid of one
827 if ((r = delete_one_unmergeable_job(m, j)) >= 0)
828 /* Ok, we managed to drop one, now
829 * let's ask our callers to call us
830 * again after garbage collecting */
833 /* We couldn't merge anything. Failure */
838 /* Second step, merge the jobs. */
839 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
843 /* Merge all transactions */
844 LIST_FOREACH(transaction, k, j->transaction_next)
845 assert_se(job_type_merge(&t, k->type) == 0);
847 /* If an active job is mergeable, merge it too */
848 if (j->unit->meta.job)
849 job_type_merge(&t, j->unit->meta.job->type); /* Might fail. Which is OK */
851 while ((k = j->transaction_next)) {
853 transaction_merge_and_delete_job(m, k, j, t);
856 transaction_merge_and_delete_job(m, j, k, t);
859 assert(!j->transaction_next);
860 assert(!j->transaction_prev);
866 static void transaction_drop_redundant(Manager *m) {
871 /* Goes through the transaction and removes all jobs that are
880 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
881 bool changes_something = false;
884 LIST_FOREACH(transaction, k, j) {
886 if (!job_is_anchor(k) &&
887 job_type_is_redundant(k->type, unit_active_state(k->unit)))
890 changes_something = true;
894 if (changes_something)
897 log_debug("Found redundant job %s/%s, dropping.", j->unit->meta.id, job_type_to_string(j->type));
898 transaction_delete_job(m, j, false);
906 static bool unit_matters_to_anchor(Unit *u, Job *j) {
908 assert(!j->transaction_prev);
910 /* Checks whether at least one of the jobs for this unit
911 * matters to the anchor. */
913 LIST_FOREACH(transaction, j, j)
914 if (j->matters_to_anchor)
920 static int transaction_verify_order_one(Manager *m, Job *j, Job *from, unsigned generation) {
927 assert(!j->transaction_prev);
929 /* Does a recursive sweep through the ordering graph, looking
930 * for a cycle. If we find cycle we try to break it. */
932 /* Did we find a cycle? */
933 if (j->marker && j->generation == generation) {
936 /* So, we already have been here. We have a
937 * cycle. Let's try to break it. We go backwards in
938 * our path and try to find a suitable job to
939 * remove. We use the marker to find our way back,
940 * since smart how we are we stored our way back in
943 log_debug("Found ordering cycle on %s/%s", j->unit->meta.id, job_type_to_string(j->type));
945 for (k = from; k; k = (k->generation == generation ? k->marker : NULL)) {
947 log_debug("Walked on cycle path to %s/%s", k->unit->meta.id, job_type_to_string(k->type));
950 !unit_matters_to_anchor(k->unit, k)) {
951 /* Ok, we can drop this one, so let's
953 log_debug("Breaking order cycle by deleting job %s/%s", k->unit->meta.id, job_type_to_string(k->type));
954 transaction_delete_unit(m, k->unit);
958 /* Check if this in fact was the beginning of
964 log_debug("Unable to break cycle");
969 /* Make the marker point to where we come from, so that we can
970 * find our way backwards if we want to break a cycle */
972 j->generation = generation;
974 /* We assume that the the dependencies are bidirectional, and
975 * hence can ignore UNIT_AFTER */
976 SET_FOREACH(u, j->unit->meta.dependencies[UNIT_BEFORE], i) {
979 /* Is there a job for this unit? */
980 if (!(o = hashmap_get(m->transaction_jobs, u)))
982 /* Ok, there is no job for this in the
983 * transaction, but maybe there is already one
985 if (!(o = u->meta.job))
988 if ((r = transaction_verify_order_one(m, o, j, generation)) < 0)
992 /* Ok, let's backtrack, and remember that this entry is not on
993 * our path anymore. */
999 static int transaction_verify_order(Manager *m, unsigned *generation) {
1007 /* Check if the ordering graph is cyclic. If it is, try to fix
1008 * that up by dropping one of the jobs. */
1010 HASHMAP_FOREACH(j, m->transaction_jobs, i)
1011 if ((r = transaction_verify_order_one(m, j, NULL, (*generation)++)) < 0)
1017 static void transaction_collect_garbage(Manager *m) {
1022 /* Drop jobs that are not required by any other job */
1030 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1034 log_debug("Garbage collecting job %s/%s", j->unit->meta.id, job_type_to_string(j->type));
1035 transaction_delete_job(m, j, true);
1043 static int transaction_is_destructive(Manager *m) {
1049 /* Checks whether applying this transaction means that
1050 * existing jobs would be replaced */
1052 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1055 assert(!j->transaction_prev);
1056 assert(!j->transaction_next);
1058 if (j->unit->meta.job &&
1059 j->unit->meta.job != j &&
1060 !job_type_is_superset(j->type, j->unit->meta.job->type))
1067 static void transaction_minimize_impact(Manager *m) {
1071 /* Drops all unnecessary jobs that reverse already active jobs
1072 * or that stop a running service. */
1080 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1081 LIST_FOREACH(transaction, j, j) {
1082 bool stops_running_service, changes_existing_job;
1084 /* If it matters, we shouldn't drop it */
1085 if (j->matters_to_anchor)
1088 /* Would this stop a running service?
1089 * Would this change an existing job?
1090 * If so, let's drop this entry */
1092 stops_running_service =
1093 j->type == JOB_STOP && UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j->unit));
1095 changes_existing_job =
1096 j->unit->meta.job && job_type_is_conflicting(j->type, j->unit->meta.job->state);
1098 if (!stops_running_service && !changes_existing_job)
1101 if (stops_running_service)
1102 log_debug("%s/%s would stop a running service.", j->unit->meta.id, job_type_to_string(j->type));
1104 if (changes_existing_job)
1105 log_debug("%s/%s would change existing job.", j->unit->meta.id, job_type_to_string(j->type));
1107 /* Ok, let's get rid of this */
1108 log_debug("Deleting %s/%s to minimize impact.", j->unit->meta.id, job_type_to_string(j->type));
1110 transaction_delete_job(m, j, true);
1122 static int transaction_apply(Manager *m) {
1127 /* Moves the transaction jobs to the set of active jobs */
1129 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1131 assert(!j->transaction_prev);
1132 assert(!j->transaction_next);
1137 if ((r = hashmap_put(m->jobs, UINT32_TO_PTR(j->id), j)) < 0)
1141 while ((j = hashmap_steal_first(m->transaction_jobs))) {
1145 if (j->unit->meta.job)
1146 job_free(j->unit->meta.job);
1148 j->unit->meta.job = j;
1149 j->installed = true;
1151 /* We're fully installed. Now let's free data we don't
1154 assert(!j->transaction_next);
1155 assert(!j->transaction_prev);
1157 job_add_to_run_queue(j);
1158 job_add_to_dbus_queue(j);
1161 /* As last step, kill all remaining job dependencies. */
1162 transaction_clean_dependencies(m);
1168 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1172 hashmap_remove(m->jobs, UINT32_TO_PTR(j->id));
1178 static int transaction_activate(Manager *m, JobMode mode) {
1180 unsigned generation = 1;
1184 /* This applies the changes recorded in transaction_jobs to
1185 * the actual list of jobs, if possible. */
1187 /* First step: figure out which jobs matter */
1188 transaction_find_jobs_that_matter_to_anchor(m, NULL, generation++);
1190 /* Second step: Try not to stop any running services if
1191 * we don't have to. Don't try to reverse running
1192 * jobs if we don't have to. */
1193 transaction_minimize_impact(m);
1195 /* Third step: Drop redundant jobs */
1196 transaction_drop_redundant(m);
1199 /* Fourth step: Let's remove unneeded jobs that might
1201 transaction_collect_garbage(m);
1203 /* Fifth step: verify order makes sense and correct
1204 * cycles if necessary and possible */
1205 if ((r = transaction_verify_order(m, &generation)) >= 0)
1209 log_debug("Requested transaction contains an unfixable cyclic ordering dependency: %s", strerror(-r));
1213 /* Let's see if the resulting transaction ordering
1214 * graph is still cyclic... */
1218 /* Sixth step: let's drop unmergeable entries if
1219 * necessary and possible, merge entries we can
1221 if ((r = transaction_merge_jobs(m)) >= 0)
1225 log_debug("Requested transaction contains unmergable jobs: %s", strerror(-r));
1229 /* Seventh step: an entry got dropped, let's garbage
1230 * collect its dependencies. */
1231 transaction_collect_garbage(m);
1233 /* Let's see if the resulting transaction still has
1234 * unmergeable entries ... */
1237 /* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */
1238 transaction_drop_redundant(m);
1240 /* Ninth step: check whether we can actually apply this */
1241 if (mode == JOB_FAIL)
1242 if ((r = transaction_is_destructive(m)) < 0) {
1243 log_debug("Requested transaction contradicts existing jobs: %s", strerror(-r));
1247 /* Tenth step: apply changes */
1248 if ((r = transaction_apply(m)) < 0) {
1249 log_debug("Failed to apply transaction: %s", strerror(-r));
1253 assert(hashmap_isempty(m->transaction_jobs));
1254 assert(!m->transaction_anchor);
1259 transaction_abort(m);
1263 static Job* transaction_add_one_job(Manager *m, JobType type, Unit *unit, bool override, bool *is_new) {
1270 /* Looks for an axisting prospective job and returns that. If
1271 * it doesn't exist it is created and added to the prospective
1274 f = hashmap_get(m->transaction_jobs, unit);
1276 LIST_FOREACH(transaction, j, f) {
1277 assert(j->unit == unit);
1279 if (j->type == type) {
1286 if (unit->meta.job && unit->meta.job->type == type)
1288 else if (!(j = job_new(m, type, unit)))
1293 j->matters_to_anchor = false;
1294 j->override = override;
1296 LIST_PREPEND(Job, transaction, f, j);
1298 if ((r = hashmap_replace(m->transaction_jobs, unit, f)) < 0) {
1306 log_debug("Added job %s/%s to transaction.", unit->meta.id, job_type_to_string(type));
1311 void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies) {
1315 if (j->transaction_prev)
1316 j->transaction_prev->transaction_next = j->transaction_next;
1317 else if (j->transaction_next)
1318 hashmap_replace(m->transaction_jobs, j->unit, j->transaction_next);
1320 hashmap_remove_value(m->transaction_jobs, j->unit, j);
1322 if (j->transaction_next)
1323 j->transaction_next->transaction_prev = j->transaction_prev;
1325 j->transaction_prev = j->transaction_next = NULL;
1327 while (j->subject_list)
1328 job_dependency_free(j->subject_list);
1330 while (j->object_list) {
1331 Job *other = j->object_list->matters ? j->object_list->subject : NULL;
1333 job_dependency_free(j->object_list);
1335 if (other && delete_dependencies) {
1336 log_debug("Deleting job %s/%s as dependency of job %s/%s",
1337 other->unit->meta.id, job_type_to_string(other->type),
1338 j->unit->meta.id, job_type_to_string(j->type));
1339 transaction_delete_job(m, other, delete_dependencies);
1344 static int transaction_add_job_and_dependencies(
1359 assert(type < _JOB_TYPE_MAX);
1362 if (unit->meta.load_state != UNIT_LOADED)
1365 if (!unit_job_is_applicable(unit, type))
1368 /* First add the job. */
1369 if (!(ret = transaction_add_one_job(m, type, unit, override, &is_new)))
1372 /* Then, add a link to the job. */
1373 if (!job_dependency_new(by, ret, matters))
1377 /* Finally, recursively add in all dependencies. */
1378 if (type == JOB_START || type == JOB_RELOAD_OR_START) {
1379 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRES], i)
1380 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, NULL)) < 0 && r != -EBADR)
1383 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1384 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, !override, override, NULL)) < 0 && r != -EBADR)
1385 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, strerror(-r));
1387 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_WANTS], i)
1388 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, false, false, NULL)) < 0)
1389 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, strerror(-r));
1391 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUISITE], i)
1392 if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, true, override, NULL)) < 0 && r != -EBADR)
1395 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
1396 if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, !override, override, NULL)) < 0 && r != -EBADR)
1397 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, strerror(-r));
1399 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_CONFLICTS], i)
1400 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, true, override, NULL)) < 0 && r != -EBADR)
1403 } else if (type == JOB_STOP || type == JOB_RESTART || type == JOB_TRY_RESTART) {
1405 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRED_BY], i)
1406 if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, NULL)) < 0 && r != -EBADR)
1410 /* JOB_VERIFY_STARTED, JOB_RELOAD require no dependency handling */
1422 static int transaction_add_isolate_jobs(Manager *m) {
1430 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
1432 /* ignore aliases */
1433 if (u->meta.id != k)
1436 if (UNIT_VTABLE(u)->no_isolate)
1439 /* No need to stop inactive jobs */
1440 if (unit_active_state(u) == UNIT_INACTIVE)
1443 /* Is there already something listed for this? */
1444 if (hashmap_get(m->transaction_jobs, u))
1447 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, u, NULL, true, false, NULL)) < 0)
1448 log_warning("Cannot add isolate job for unit %s, ignoring: %s", u->meta.id, strerror(-r));
1454 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, Job **_ret) {
1459 assert(type < _JOB_TYPE_MAX);
1461 assert(mode < _JOB_MODE_MAX);
1463 if (mode == JOB_ISOLATE && type != JOB_START)
1466 log_debug("Trying to enqueue job %s/%s", unit->meta.id, job_type_to_string(type));
1468 if ((r = transaction_add_job_and_dependencies(m, type, unit, NULL, true, override, &ret)) < 0) {
1469 transaction_abort(m);
1473 if (mode == JOB_ISOLATE)
1474 if ((r = transaction_add_isolate_jobs(m)) < 0) {
1475 transaction_abort(m);
1479 if ((r = transaction_activate(m, mode)) < 0)
1482 log_debug("Enqueued job %s/%s as %u", unit->meta.id, job_type_to_string(type), (unsigned) ret->id);
1490 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, Job **_ret) {
1495 assert(type < _JOB_TYPE_MAX);
1497 assert(mode < _JOB_MODE_MAX);
1499 if ((r = manager_load_unit(m, name, NULL, &unit)) < 0)
1502 return manager_add_job(m, type, unit, mode, override, _ret);
1505 Job *manager_get_job(Manager *m, uint32_t id) {
1508 return hashmap_get(m->jobs, UINT32_TO_PTR(id));
1511 Unit *manager_get_unit(Manager *m, const char *name) {
1515 return hashmap_get(m->units, name);
1518 unsigned manager_dispatch_load_queue(Manager *m) {
1524 /* Make sure we are not run recursively */
1525 if (m->dispatching_load_queue)
1528 m->dispatching_load_queue = true;
1530 /* Dispatches the load queue. Takes a unit from the queue and
1531 * tries to load its data until the queue is empty */
1533 while ((meta = m->load_queue)) {
1534 assert(meta->in_load_queue);
1536 unit_load(UNIT(meta));
1540 m->dispatching_load_queue = false;
1544 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, Unit **_ret) {
1549 assert(name || path);
1551 /* This will prepare the unit for loading, but not actually
1552 * load anything from disk. */
1554 if (path && !is_path(path))
1558 name = file_name_from_path(path);
1560 if (!unit_name_is_valid(name))
1563 if ((ret = manager_get_unit(m, name))) {
1568 if (!(ret = unit_new(m)))
1572 if (!(ret->meta.fragment_path = strdup(path))) {
1577 if ((r = unit_add_name(ret, name)) < 0) {
1582 unit_add_to_load_queue(ret);
1583 unit_add_to_dbus_queue(ret);
1591 int manager_load_unit(Manager *m, const char *name, const char *path, Unit **_ret) {
1597 /* This will load the service information files, but not actually
1598 * start any services or anything. */
1600 if ((r = manager_load_unit_prepare(m, name, path, &ret)) < 0)
1603 manager_dispatch_load_queue(m);
1606 *_ret = unit_follow_merge(ret);
1611 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix) {
1618 HASHMAP_FOREACH(j, s->jobs, i)
1619 job_dump(j, f, prefix);
1622 void manager_dump_units(Manager *s, FILE *f, const char *prefix) {
1630 HASHMAP_FOREACH_KEY(u, t, s->units, i)
1631 if (u->meta.id == t)
1632 unit_dump(u, f, prefix);
1635 void manager_clear_jobs(Manager *m) {
1640 transaction_abort(m);
1642 while ((j = hashmap_first(m->jobs)))
1646 unsigned manager_dispatch_run_queue(Manager *m) {
1650 if (m->dispatching_run_queue)
1653 m->dispatching_run_queue = true;
1655 while ((j = m->run_queue)) {
1656 assert(j->installed);
1657 assert(j->in_run_queue);
1659 job_run_and_invalidate(j);
1663 m->dispatching_run_queue = false;
1667 unsigned manager_dispatch_dbus_queue(Manager *m) {
1674 if (m->dispatching_dbus_queue)
1677 m->dispatching_dbus_queue = true;
1679 while ((meta = m->dbus_unit_queue)) {
1680 assert(meta->in_dbus_queue);
1682 bus_unit_send_change_signal(UNIT(meta));
1686 while ((j = m->dbus_job_queue)) {
1687 assert(j->in_dbus_queue);
1689 bus_job_send_change_signal(j);
1693 m->dispatching_dbus_queue = false;
1697 static int manager_dispatch_sigchld(Manager *m) {
1706 /* First we call waitd() for a PID and do not reap the
1707 * zombie. That way we can still access /proc/$PID for
1708 * it while it is a zombie. */
1709 if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) {
1711 if (errno == ECHILD)
1723 if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) {
1726 get_process_name(si.si_pid, &name);
1727 log_debug("Got SIGCHLD for process %llu (%s)", (unsigned long long) si.si_pid, strna(name));
1731 /* And now, we actually reap the zombie. */
1732 if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {
1739 if (si.si_code != CLD_EXITED && si.si_code != CLD_KILLED && si.si_code != CLD_DUMPED)
1742 log_debug("Child %llu died (code=%s, status=%i/%s)",
1743 (long long unsigned) si.si_pid,
1744 sigchld_code_to_string(si.si_code),
1746 strna(si.si_code == CLD_EXITED ? exit_status_to_string(si.si_status) : strsignal(si.si_status)));
1748 if (!(u = hashmap_remove(m->watch_pids, UINT32_TO_PTR(si.si_pid))))
1751 log_debug("Child %llu belongs to %s", (long long unsigned) si.si_pid, u->meta.id);
1753 UNIT_VTABLE(u)->sigchld_event(u, si.si_pid, si.si_code, si.si_status);
1759 static void manager_start_target(Manager *m, const char *name) {
1762 if ((r = manager_add_job_by_name(m, JOB_START, name, JOB_REPLACE, true, NULL)) < 0)
1763 log_error("Failed to enqueue %s job: %s", name, strerror(-r));
1766 static int manager_process_signal_fd(Manager *m) {
1768 struct signalfd_siginfo sfsi;
1769 bool sigchld = false;
1774 if ((n = read(m->signal_watch.fd, &sfsi, sizeof(sfsi))) != sizeof(sfsi)) {
1779 if (errno == EAGAIN)
1785 switch (sfsi.ssi_signo) {
1792 if (m->running_as == MANAGER_INIT)
1793 /* This is for compatibility with the
1794 * original sysvinit */
1795 m->exit_code = MANAGER_REEXECUTE;
1797 m->exit_code = MANAGER_EXIT;
1802 if (m->running_as == MANAGER_INIT) {
1803 manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET);
1807 m->exit_code = MANAGER_EXIT;
1811 if (m->running_as == MANAGER_INIT)
1812 manager_start_target(m, SPECIAL_KBREQUEST_TARGET);
1814 /* This is a nop on non-init */
1818 if (m->running_as == MANAGER_INIT)
1819 manager_start_target(m, SPECIAL_SIGPWR_TARGET);
1821 /* This is a nop on non-init */
1827 u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);
1829 if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) {
1830 log_info("Trying to reconnect to bus...");
1835 if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) {
1836 log_info("Loading D-Bus service...");
1837 manager_start_target(m, SPECIAL_DBUS_SERVICE);
1844 manager_dump_units(m, stdout, "\t");
1845 manager_dump_jobs(m, stdout, "\t");
1849 m->exit_code = MANAGER_RELOAD;
1853 log_info("Got unhandled signal <%s>.", strsignal(sfsi.ssi_signo));
1858 return manager_dispatch_sigchld(m);
1863 static int process_event(Manager *m, struct epoll_event *ev) {
1870 assert(w = ev->data.ptr);
1876 /* An incoming signal? */
1877 if (ev->events != EPOLLIN)
1880 if ((r = manager_process_signal_fd(m)) < 0)
1887 /* Some fd event, to be dispatched to the units */
1888 UNIT_VTABLE(w->data.unit)->fd_event(w->data.unit, w->fd, ev->events, w);
1895 /* Some timer event, to be dispatched to the units */
1896 if ((k = read(w->fd, &v, sizeof(v))) != sizeof(v)) {
1898 if (k < 0 && (errno == EINTR || errno == EAGAIN))
1901 return k < 0 ? -errno : -EIO;
1904 UNIT_VTABLE(w->data.unit)->timer_event(w->data.unit, v, w);
1909 /* Some mount table change, intended for the mount subsystem */
1910 mount_fd_event(m, ev->events);
1914 /* Some notification from udev, intended for the device subsystem */
1915 device_fd_event(m, ev->events);
1918 case WATCH_DBUS_WATCH:
1919 bus_watch_event(m, w, ev->events);
1922 case WATCH_DBUS_TIMEOUT:
1923 bus_timeout_event(m, w, ev->events);
1927 assert_not_reached("Unknown epoll event type.");
1933 int manager_loop(Manager *m) {
1936 RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 1000);
1939 m->exit_code = MANAGER_RUNNING;
1941 while (m->exit_code == MANAGER_RUNNING) {
1942 struct epoll_event event;
1945 if (!ratelimit_test(&rl)) {
1946 /* Yay, something is going seriously wrong, pause a little */
1947 log_warning("Looping too fast. Throttling execution a little.");
1951 if (manager_dispatch_cleanup_queue(m) > 0)
1954 if (manager_dispatch_gc_queue(m) > 0)
1957 if (manager_dispatch_load_queue(m) > 0)
1960 if (manager_dispatch_run_queue(m) > 0)
1963 if (bus_dispatch(m) > 0)
1966 if (manager_dispatch_dbus_queue(m) > 0)
1969 if ((n = epoll_wait(m->epoll_fd, &event, 1, -1)) < 0) {
1979 if ((r = process_event(m, &event)) < 0)
1983 return m->exit_code;
1986 int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u) {
1994 if (!startswith(s, "/org/freedesktop/systemd1/unit/"))
1997 if (!(n = bus_path_unescape(s+31)))
2000 u = manager_get_unit(m, n);
2011 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) {
2020 if (!startswith(s, "/org/freedesktop/systemd1/job/"))
2023 if ((r = safe_atou(s + 30, &id)) < 0)
2026 if (!(j = manager_get_job(m, id)))
2034 static bool manager_utmp_good(Manager *m) {
2039 if ((r = mount_path_is_mounted(m, _PATH_UTMPX)) <= 0) {
2042 log_warning("Failed to determine whether " _PATH_UTMPX " is mounted: %s", strerror(-r));
2050 void manager_write_utmp_reboot(Manager *m) {
2055 if (m->utmp_reboot_written)
2058 if (m->running_as != MANAGER_INIT)
2061 if (!manager_utmp_good(m))
2064 if ((r = utmp_put_reboot(m->boot_timestamp)) < 0) {
2066 if (r != -ENOENT && r != -EROFS)
2067 log_warning("Failed to write utmp/wtmp: %s", strerror(-r));
2072 m->utmp_reboot_written = true;
2075 void manager_write_utmp_runlevel(Manager *m, Unit *u) {
2081 if (u->meta.type != UNIT_TARGET)
2084 if (m->running_as != MANAGER_INIT)
2087 if (!manager_utmp_good(m))
2090 if ((runlevel = target_get_runlevel(TARGET(u))) <= 0)
2093 if ((r = utmp_put_runlevel(0, runlevel, 0)) < 0) {
2095 if (r != -ENOENT && r != -EROFS)
2096 log_warning("Failed to write utmp/wtmp: %s", strerror(-r));
2100 void manager_dispatch_bus_name_owner_changed(
2103 const char* old_owner,
2104 const char *new_owner) {
2111 if (!(u = hashmap_get(m->watch_bus, name)))
2114 UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner);
2117 void manager_dispatch_bus_query_pid_done(
2128 if (!(u = hashmap_get(m->watch_bus, name)))
2131 UNIT_VTABLE(u)->bus_query_pid_done(u, name, pid);
2134 int manager_open_serialization(FILE **_f) {
2142 if (asprintf(&path, "/dev/shm/systemd-%u.dump-XXXXXX", (unsigned) getpid()) < 0)
2145 saved_umask = umask(0077);
2146 fd = mkostemp(path, O_RDWR|O_CLOEXEC);
2156 log_debug("Serializing state to %s", path);
2159 if (!(f = fdopen(fd, "w+")) < 0)
2167 int manager_serialize(Manager *m, FILE *f, FDSet *fds) {
2177 HASHMAP_FOREACH_KEY(u, t, m->units, i) {
2178 if (u->meta.id != t)
2181 if (!unit_can_serialize(u))
2185 fputs(u->meta.id, f);
2188 if ((r = unit_serialize(u, f, fds)) < 0)
2198 int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
2204 log_debug("Deserializing state...");
2208 char name[UNIT_NAME_MAX+2];
2211 if (!fgets(name, sizeof(name), f)) {
2220 if ((r = manager_load_unit(m, strstrip(name), NULL, &u)) < 0)
2223 if ((r = unit_deserialize(u, f, fds)) < 0)
2233 int manager_reload(Manager *m) {
2240 if ((r = manager_open_serialization(&f)) < 0)
2243 if (!(fds = fdset_new())) {
2248 if ((r = manager_serialize(m, f, fds)) < 0)
2251 if (fseeko(f, 0, SEEK_SET) < 0) {
2256 /* From here on there is no way back. */
2257 manager_clear_jobs_and_units(m);
2259 /* First, enumerate what we can from all config files */
2260 if ((q = manager_enumerate(m)) < 0)
2263 /* Second, deserialize our stored data */
2264 if ((q = manager_deserialize(m, f, fds)) < 0)
2270 /* Third, fire things up! */
2271 if ((q = manager_coldplug(m)) < 0)
2284 static const char* const manager_running_as_table[_MANAGER_RUNNING_AS_MAX] = {
2285 [MANAGER_INIT] = "init",
2286 [MANAGER_SYSTEM] = "system",
2287 [MANAGER_SESSION] = "session"
2290 DEFINE_STRING_TABLE_LOOKUP(manager_running_as, ManagerRunningAs);