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 (10*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|O_NOCTTY)) < 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 if (!(config_dirs = strv_split(e, ":")))
155 /* We don't treat /etc/xdg/systemd here as the spec
156 * suggests because we assume that that is a link to
157 * /etc/systemd/ anyway. */
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/ compatibility 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/ */
287 if (!strv_path_canonicalize(m->unit_path))
290 if (m->sysvinit_path)
291 if (!strv_path_canonicalize(m->sysvinit_path))
294 if (m->sysvrcnd_path)
295 if (!strv_path_canonicalize(m->sysvrcnd_path))
298 strv_uniq(m->unit_path);
299 strv_uniq(m->sysvinit_path);
300 strv_uniq(m->sysvrcnd_path);
302 if (!strv_isempty(m->unit_path)) {
304 if (!(t = strv_join(m->unit_path, "\n\t")))
306 log_debug("Looking for unit files in:\n\t%s", t);
309 log_debug("Ignoring unit files.");
310 strv_free(m->unit_path);
314 if (!strv_isempty(m->sysvinit_path)) {
316 if (!(t = strv_join(m->sysvinit_path, "\n\t")))
319 log_debug("Looking for SysV init scripts in:\n\t%s", t);
322 log_debug("Ignoring SysV init scripts.");
323 strv_free(m->sysvinit_path);
324 m->sysvinit_path = NULL;
327 if (!strv_isempty(m->sysvrcnd_path)) {
329 if (!(t = strv_join(m->sysvrcnd_path, "\n\t")))
332 log_debug("Looking for SysV rcN.d links in:\n\t%s", t);
335 log_debug("Ignoring SysV rcN.d links.");
336 strv_free(m->sysvrcnd_path);
337 m->sysvrcnd_path = NULL;
343 int manager_new(ManagerRunningAs running_as, bool confirm_spawn, Manager **_m) {
348 assert(running_as >= 0);
349 assert(running_as < _MANAGER_RUNNING_AS_MAX);
351 if (!(m = new0(Manager, 1)))
354 m->boot_timestamp = now(CLOCK_REALTIME);
356 m->running_as = running_as;
357 m->confirm_spawn = confirm_spawn;
358 m->name_data_slot = -1;
359 m->exit_code = _MANAGER_EXIT_CODE_INVALID;
361 m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = m->dev_autofs_fd = -1;
362 m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
364 if (!(m->environment = strv_copy(environ)))
367 if (!(m->units = hashmap_new(string_hash_func, string_compare_func)))
370 if (!(m->jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))
373 if (!(m->transaction_jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))
376 if (!(m->watch_pids = hashmap_new(trivial_hash_func, trivial_compare_func)))
379 if (!(m->cgroup_bondings = hashmap_new(string_hash_func, string_compare_func)))
382 if (!(m->watch_bus = hashmap_new(string_hash_func, string_compare_func)))
385 if ((m->epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0)
388 if ((r = manager_find_paths(m)) < 0)
391 if ((r = manager_setup_signals(m)) < 0)
394 if ((r = manager_setup_cgroup(m)) < 0)
397 /* Try to connect to the busses, if possible. */
398 if ((r = bus_init_system(m)) < 0 ||
399 (r = bus_init_api(m)) < 0)
410 static unsigned manager_dispatch_cleanup_queue(Manager *m) {
416 while ((meta = m->cleanup_queue)) {
417 assert(meta->in_cleanup_queue);
419 unit_free(UNIT(meta));
427 GC_OFFSET_IN_PATH, /* This one is on the path we were travelling */
428 GC_OFFSET_UNSURE, /* No clue */
429 GC_OFFSET_GOOD, /* We still need this unit */
430 GC_OFFSET_BAD, /* We don't need this unit anymore */
434 static void unit_gc_sweep(Unit *u, unsigned gc_marker) {
441 if (u->meta.gc_marker == gc_marker + GC_OFFSET_GOOD ||
442 u->meta.gc_marker == gc_marker + GC_OFFSET_BAD ||
443 u->meta.gc_marker == gc_marker + GC_OFFSET_IN_PATH)
446 if (u->meta.in_cleanup_queue)
449 if (unit_check_gc(u))
452 u->meta.gc_marker = gc_marker + GC_OFFSET_IN_PATH;
456 SET_FOREACH(other, u->meta.dependencies[UNIT_REFERENCED_BY], i) {
457 unit_gc_sweep(other, gc_marker);
459 if (other->meta.gc_marker == gc_marker + GC_OFFSET_GOOD)
462 if (other->meta.gc_marker != gc_marker + GC_OFFSET_BAD)
469 /* We were unable to find anything out about this entry, so
470 * let's investigate it later */
471 u->meta.gc_marker = gc_marker + GC_OFFSET_UNSURE;
472 unit_add_to_gc_queue(u);
476 /* We definitely know that this one is not useful anymore, so
477 * let's mark it for deletion */
478 u->meta.gc_marker = gc_marker + GC_OFFSET_BAD;
479 unit_add_to_cleanup_queue(u);
483 u->meta.gc_marker = gc_marker + GC_OFFSET_GOOD;
486 static unsigned manager_dispatch_gc_queue(Manager *m) {
493 if ((m->n_in_gc_queue < GC_QUEUE_ENTRIES_MAX) &&
494 (m->gc_queue_timestamp <= 0 ||
495 (m->gc_queue_timestamp + GC_QUEUE_USEC_MAX) > now(CLOCK_MONOTONIC)))
498 log_debug("Running GC...");
500 m->gc_marker += _GC_OFFSET_MAX;
501 if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX)
504 gc_marker = m->gc_marker;
506 while ((meta = m->gc_queue)) {
507 assert(meta->in_gc_queue);
509 unit_gc_sweep(UNIT(meta), gc_marker);
511 LIST_REMOVE(Meta, gc_queue, m->gc_queue, meta);
512 meta->in_gc_queue = false;
516 if (meta->gc_marker == gc_marker + GC_OFFSET_BAD ||
517 meta->gc_marker == gc_marker + GC_OFFSET_UNSURE) {
518 log_debug("Collecting %s", meta->id);
519 meta->gc_marker = gc_marker + GC_OFFSET_BAD;
520 unit_add_to_cleanup_queue(UNIT(meta));
524 m->n_in_gc_queue = 0;
525 m->gc_queue_timestamp = 0;
530 static void manager_clear_jobs_and_units(Manager *m) {
536 while ((j = hashmap_first(m->transaction_jobs)))
539 while ((u = hashmap_first(m->units)))
543 void manager_free(Manager *m) {
548 manager_dispatch_cleanup_queue(m);
549 manager_clear_jobs_and_units(m);
551 for (c = 0; c < _UNIT_TYPE_MAX; c++)
552 if (unit_vtable[c]->shutdown)
553 unit_vtable[c]->shutdown(m);
555 /* If we reexecute ourselves, we keep the root cgroup
557 manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE);
562 hashmap_free(m->units);
563 hashmap_free(m->jobs);
564 hashmap_free(m->transaction_jobs);
565 hashmap_free(m->watch_pids);
566 hashmap_free(m->watch_bus);
568 if (m->epoll_fd >= 0)
569 close_nointr_nofail(m->epoll_fd);
570 if (m->signal_watch.fd >= 0)
571 close_nointr_nofail(m->signal_watch.fd);
573 strv_free(m->unit_path);
574 strv_free(m->sysvinit_path);
575 strv_free(m->sysvrcnd_path);
576 strv_free(m->environment);
578 free(m->cgroup_controller);
579 free(m->cgroup_hierarchy);
581 hashmap_free(m->cgroup_bondings);
586 int manager_enumerate(Manager *m) {
592 /* Let's ask every type to load all units from disk/kernel
593 * that it might know */
594 for (c = 0; c < _UNIT_TYPE_MAX; c++)
595 if (unit_vtable[c]->enumerate)
596 if ((q = unit_vtable[c]->enumerate(m)) < 0)
599 manager_dispatch_load_queue(m);
603 int manager_coldplug(Manager *m) {
611 /* Then, let's set up their initial state. */
612 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
618 if (UNIT_VTABLE(u)->coldplug)
619 if ((q = UNIT_VTABLE(u)->coldplug(u)) < 0)
626 int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {
631 /* First, enumerate what we can from all config files */
632 r = manager_enumerate(m);
634 /* Second, deserialize if there is something to deserialize */
636 if ((q = manager_deserialize(m, serialization, fds)) < 0)
639 /* Third, fire things up! */
640 if ((q = manager_coldplug(m)) < 0)
643 /* Now that the initial devices are available, let's see if we
644 * can write the utmp file */
645 manager_write_utmp_reboot(m);
650 static void transaction_delete_job(Manager *m, Job *j, bool delete_dependencies) {
654 /* Deletes one job from the transaction */
656 manager_transaction_unlink_job(m, j, delete_dependencies);
662 static void transaction_delete_unit(Manager *m, Unit *u) {
665 /* Deletes all jobs associated with a certain unit from the
668 while ((j = hashmap_get(m->transaction_jobs, u)))
669 transaction_delete_job(m, j, true);
672 static void transaction_clean_dependencies(Manager *m) {
678 /* Drops all dependencies of all installed jobs */
680 HASHMAP_FOREACH(j, m->jobs, i) {
681 while (j->subject_list)
682 job_dependency_free(j->subject_list);
683 while (j->object_list)
684 job_dependency_free(j->object_list);
687 assert(!m->transaction_anchor);
690 static void transaction_abort(Manager *m) {
695 while ((j = hashmap_first(m->transaction_jobs)))
697 transaction_delete_job(m, j, true);
701 assert(hashmap_isempty(m->transaction_jobs));
703 transaction_clean_dependencies(m);
706 static void transaction_find_jobs_that_matter_to_anchor(Manager *m, Job *j, unsigned generation) {
711 /* A recursive sweep through the graph that marks all units
712 * that matter to the anchor job, i.e. are directly or
713 * indirectly a dependency of the anchor job via paths that
714 * are fully marked as mattering. */
719 l = m->transaction_anchor;
721 LIST_FOREACH(subject, l, l) {
723 /* This link does not matter */
727 /* This unit has already been marked */
728 if (l->object->generation == generation)
731 l->object->matters_to_anchor = true;
732 l->object->generation = generation;
734 transaction_find_jobs_that_matter_to_anchor(m, l->object, generation);
738 static void transaction_merge_and_delete_job(Manager *m, Job *j, Job *other, JobType t) {
739 JobDependency *l, *last;
743 assert(j->unit == other->unit);
744 assert(!j->installed);
746 /* Merges 'other' into 'j' and then deletes j. */
749 j->state = JOB_WAITING;
750 j->override = j->override || other->override;
752 j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor;
754 /* Patch us in as new owner of the JobDependency objects */
756 LIST_FOREACH(subject, l, other->subject_list) {
757 assert(l->subject == other);
762 /* Merge both lists */
764 last->subject_next = j->subject_list;
766 j->subject_list->subject_prev = last;
767 j->subject_list = other->subject_list;
770 /* Patch us in as new owner of the JobDependency objects */
772 LIST_FOREACH(object, l, other->object_list) {
773 assert(l->object == other);
778 /* Merge both lists */
780 last->object_next = j->object_list;
782 j->object_list->object_prev = last;
783 j->object_list = other->object_list;
786 /* Kill the other job */
787 other->subject_list = NULL;
788 other->object_list = NULL;
789 transaction_delete_job(m, other, true);
792 static int delete_one_unmergeable_job(Manager *m, Job *j) {
797 /* Tries to delete one item in the linked list
798 * j->transaction_next->transaction_next->... that conflicts
799 * whith another one, in an attempt to make an inconsistent
800 * transaction work. */
802 /* We rely here on the fact that if a merged with b does not
803 * merge with c, either a or b merge with c neither */
804 LIST_FOREACH(transaction, j, j)
805 LIST_FOREACH(transaction, k, j->transaction_next) {
808 /* Is this one mergeable? Then skip it */
809 if (job_type_is_mergeable(j->type, k->type))
812 /* Ok, we found two that conflict, let's see if we can
813 * drop one of them */
814 if (!j->matters_to_anchor)
816 else if (!k->matters_to_anchor)
821 /* Ok, we can drop one, so let's do so. */
822 log_debug("Trying to fix job merging by deleting job %s/%s", d->unit->meta.id, job_type_to_string(d->type));
823 transaction_delete_job(m, d, true);
830 static int transaction_merge_jobs(Manager *m) {
837 /* First step, check whether any of the jobs for one specific
838 * task conflict. If so, try to drop one of them. */
839 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
844 LIST_FOREACH(transaction, k, j->transaction_next) {
845 if ((r = job_type_merge(&t, k->type)) >= 0)
848 /* OK, we could not merge all jobs for this
849 * action. Let's see if we can get rid of one
852 if ((r = delete_one_unmergeable_job(m, j)) >= 0)
853 /* Ok, we managed to drop one, now
854 * let's ask our callers to call us
855 * again after garbage collecting */
858 /* We couldn't merge anything. Failure */
863 /* Second step, merge the jobs. */
864 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
868 /* Merge all transactions */
869 LIST_FOREACH(transaction, k, j->transaction_next)
870 assert_se(job_type_merge(&t, k->type) == 0);
872 /* If an active job is mergeable, merge it too */
873 if (j->unit->meta.job)
874 job_type_merge(&t, j->unit->meta.job->type); /* Might fail. Which is OK */
876 while ((k = j->transaction_next)) {
878 transaction_merge_and_delete_job(m, k, j, t);
881 transaction_merge_and_delete_job(m, j, k, t);
884 assert(!j->transaction_next);
885 assert(!j->transaction_prev);
891 static void transaction_drop_redundant(Manager *m) {
896 /* Goes through the transaction and removes all jobs that are
905 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
906 bool changes_something = false;
909 LIST_FOREACH(transaction, k, j) {
911 if (!job_is_anchor(k) &&
912 job_type_is_redundant(k->type, unit_active_state(k->unit)))
915 changes_something = true;
919 if (changes_something)
922 log_debug("Found redundant job %s/%s, dropping.", j->unit->meta.id, job_type_to_string(j->type));
923 transaction_delete_job(m, j, false);
931 static bool unit_matters_to_anchor(Unit *u, Job *j) {
933 assert(!j->transaction_prev);
935 /* Checks whether at least one of the jobs for this unit
936 * matters to the anchor. */
938 LIST_FOREACH(transaction, j, j)
939 if (j->matters_to_anchor)
945 static int transaction_verify_order_one(Manager *m, Job *j, Job *from, unsigned generation) {
952 assert(!j->transaction_prev);
954 /* Does a recursive sweep through the ordering graph, looking
955 * for a cycle. If we find cycle we try to break it. */
957 /* Did we find a cycle? */
958 if (j->marker && j->generation == generation) {
961 /* So, we already have been here. We have a
962 * cycle. Let's try to break it. We go backwards in
963 * our path and try to find a suitable job to
964 * remove. We use the marker to find our way back,
965 * since smart how we are we stored our way back in
968 log_debug("Found ordering cycle on %s/%s", j->unit->meta.id, job_type_to_string(j->type));
970 for (k = from; k; k = (k->generation == generation ? k->marker : NULL)) {
972 log_debug("Walked on cycle path to %s/%s", k->unit->meta.id, job_type_to_string(k->type));
975 !unit_matters_to_anchor(k->unit, k)) {
976 /* Ok, we can drop this one, so let's
978 log_debug("Breaking order cycle by deleting job %s/%s", k->unit->meta.id, job_type_to_string(k->type));
979 transaction_delete_unit(m, k->unit);
983 /* Check if this in fact was the beginning of
989 log_debug("Unable to break cycle");
994 /* Make the marker point to where we come from, so that we can
995 * find our way backwards if we want to break a cycle */
997 j->generation = generation;
999 /* We assume that the the dependencies are bidirectional, and
1000 * hence can ignore UNIT_AFTER */
1001 SET_FOREACH(u, j->unit->meta.dependencies[UNIT_BEFORE], i) {
1004 /* Is there a job for this unit? */
1005 if (!(o = hashmap_get(m->transaction_jobs, u)))
1007 /* Ok, there is no job for this in the
1008 * transaction, but maybe there is already one
1010 if (!(o = u->meta.job))
1013 if ((r = transaction_verify_order_one(m, o, j, generation)) < 0)
1017 /* Ok, let's backtrack, and remember that this entry is not on
1018 * our path anymore. */
1024 static int transaction_verify_order(Manager *m, unsigned *generation) {
1032 /* Check if the ordering graph is cyclic. If it is, try to fix
1033 * that up by dropping one of the jobs. */
1035 HASHMAP_FOREACH(j, m->transaction_jobs, i)
1036 if ((r = transaction_verify_order_one(m, j, NULL, (*generation)++)) < 0)
1042 static void transaction_collect_garbage(Manager *m) {
1047 /* Drop jobs that are not required by any other job */
1055 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1059 log_debug("Garbage collecting job %s/%s", j->unit->meta.id, job_type_to_string(j->type));
1060 transaction_delete_job(m, j, true);
1068 static int transaction_is_destructive(Manager *m) {
1074 /* Checks whether applying this transaction means that
1075 * existing jobs would be replaced */
1077 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1080 assert(!j->transaction_prev);
1081 assert(!j->transaction_next);
1083 if (j->unit->meta.job &&
1084 j->unit->meta.job != j &&
1085 !job_type_is_superset(j->type, j->unit->meta.job->type))
1092 static void transaction_minimize_impact(Manager *m) {
1096 /* Drops all unnecessary jobs that reverse already active jobs
1097 * or that stop a running service. */
1105 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1106 LIST_FOREACH(transaction, j, j) {
1107 bool stops_running_service, changes_existing_job;
1109 /* If it matters, we shouldn't drop it */
1110 if (j->matters_to_anchor)
1113 /* Would this stop a running service?
1114 * Would this change an existing job?
1115 * If so, let's drop this entry */
1117 stops_running_service =
1118 j->type == JOB_STOP && UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j->unit));
1120 changes_existing_job =
1121 j->unit->meta.job && job_type_is_conflicting(j->type, j->unit->meta.job->state);
1123 if (!stops_running_service && !changes_existing_job)
1126 if (stops_running_service)
1127 log_debug("%s/%s would stop a running service.", j->unit->meta.id, job_type_to_string(j->type));
1129 if (changes_existing_job)
1130 log_debug("%s/%s would change existing job.", j->unit->meta.id, job_type_to_string(j->type));
1132 /* Ok, let's get rid of this */
1133 log_debug("Deleting %s/%s to minimize impact.", j->unit->meta.id, job_type_to_string(j->type));
1135 transaction_delete_job(m, j, true);
1147 static int transaction_apply(Manager *m) {
1152 /* Moves the transaction jobs to the set of active jobs */
1154 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1156 assert(!j->transaction_prev);
1157 assert(!j->transaction_next);
1162 if ((r = hashmap_put(m->jobs, UINT32_TO_PTR(j->id), j)) < 0)
1166 while ((j = hashmap_steal_first(m->transaction_jobs))) {
1170 if (j->unit->meta.job)
1171 job_free(j->unit->meta.job);
1173 j->unit->meta.job = j;
1174 j->installed = true;
1176 /* We're fully installed. Now let's free data we don't
1179 assert(!j->transaction_next);
1180 assert(!j->transaction_prev);
1182 job_add_to_run_queue(j);
1183 job_add_to_dbus_queue(j);
1186 /* As last step, kill all remaining job dependencies. */
1187 transaction_clean_dependencies(m);
1193 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1197 hashmap_remove(m->jobs, UINT32_TO_PTR(j->id));
1203 static int transaction_activate(Manager *m, JobMode mode) {
1205 unsigned generation = 1;
1209 /* This applies the changes recorded in transaction_jobs to
1210 * the actual list of jobs, if possible. */
1212 /* First step: figure out which jobs matter */
1213 transaction_find_jobs_that_matter_to_anchor(m, NULL, generation++);
1215 /* Second step: Try not to stop any running services if
1216 * we don't have to. Don't try to reverse running
1217 * jobs if we don't have to. */
1218 transaction_minimize_impact(m);
1220 /* Third step: Drop redundant jobs */
1221 transaction_drop_redundant(m);
1224 /* Fourth step: Let's remove unneeded jobs that might
1226 transaction_collect_garbage(m);
1228 /* Fifth step: verify order makes sense and correct
1229 * cycles if necessary and possible */
1230 if ((r = transaction_verify_order(m, &generation)) >= 0)
1234 log_debug("Requested transaction contains an unfixable cyclic ordering dependency: %s", strerror(-r));
1238 /* Let's see if the resulting transaction ordering
1239 * graph is still cyclic... */
1243 /* Sixth step: let's drop unmergeable entries if
1244 * necessary and possible, merge entries we can
1246 if ((r = transaction_merge_jobs(m)) >= 0)
1250 log_debug("Requested transaction contains unmergable jobs: %s", strerror(-r));
1254 /* Seventh step: an entry got dropped, let's garbage
1255 * collect its dependencies. */
1256 transaction_collect_garbage(m);
1258 /* Let's see if the resulting transaction still has
1259 * unmergeable entries ... */
1262 /* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */
1263 transaction_drop_redundant(m);
1265 /* Ninth step: check whether we can actually apply this */
1266 if (mode == JOB_FAIL)
1267 if ((r = transaction_is_destructive(m)) < 0) {
1268 log_debug("Requested transaction contradicts existing jobs: %s", strerror(-r));
1272 /* Tenth step: apply changes */
1273 if ((r = transaction_apply(m)) < 0) {
1274 log_debug("Failed to apply transaction: %s", strerror(-r));
1278 assert(hashmap_isempty(m->transaction_jobs));
1279 assert(!m->transaction_anchor);
1284 transaction_abort(m);
1288 static Job* transaction_add_one_job(Manager *m, JobType type, Unit *unit, bool override, bool *is_new) {
1295 /* Looks for an axisting prospective job and returns that. If
1296 * it doesn't exist it is created and added to the prospective
1299 f = hashmap_get(m->transaction_jobs, unit);
1301 LIST_FOREACH(transaction, j, f) {
1302 assert(j->unit == unit);
1304 if (j->type == type) {
1311 if (unit->meta.job && unit->meta.job->type == type)
1313 else if (!(j = job_new(m, type, unit)))
1318 j->matters_to_anchor = false;
1319 j->override = override;
1321 LIST_PREPEND(Job, transaction, f, j);
1323 if ((r = hashmap_replace(m->transaction_jobs, unit, f)) < 0) {
1331 log_debug("Added job %s/%s to transaction.", unit->meta.id, job_type_to_string(type));
1336 void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies) {
1340 if (j->transaction_prev)
1341 j->transaction_prev->transaction_next = j->transaction_next;
1342 else if (j->transaction_next)
1343 hashmap_replace(m->transaction_jobs, j->unit, j->transaction_next);
1345 hashmap_remove_value(m->transaction_jobs, j->unit, j);
1347 if (j->transaction_next)
1348 j->transaction_next->transaction_prev = j->transaction_prev;
1350 j->transaction_prev = j->transaction_next = NULL;
1352 while (j->subject_list)
1353 job_dependency_free(j->subject_list);
1355 while (j->object_list) {
1356 Job *other = j->object_list->matters ? j->object_list->subject : NULL;
1358 job_dependency_free(j->object_list);
1360 if (other && delete_dependencies) {
1361 log_debug("Deleting job %s/%s as dependency of job %s/%s",
1362 other->unit->meta.id, job_type_to_string(other->type),
1363 j->unit->meta.id, job_type_to_string(j->type));
1364 transaction_delete_job(m, other, delete_dependencies);
1369 static int transaction_add_job_and_dependencies(
1384 assert(type < _JOB_TYPE_MAX);
1387 if (unit->meta.load_state != UNIT_LOADED)
1390 if (!unit_job_is_applicable(unit, type))
1393 /* First add the job. */
1394 if (!(ret = transaction_add_one_job(m, type, unit, override, &is_new)))
1397 /* Then, add a link to the job. */
1398 if (!job_dependency_new(by, ret, matters))
1402 /* Finally, recursively add in all dependencies. */
1403 if (type == JOB_START || type == JOB_RELOAD_OR_START) {
1404 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRES], i)
1405 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, NULL)) < 0 && r != -EBADR)
1408 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1409 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, !override, override, NULL)) < 0 && r != -EBADR)
1410 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, strerror(-r));
1412 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_WANTS], i)
1413 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, false, false, NULL)) < 0)
1414 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, strerror(-r));
1416 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUISITE], i)
1417 if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, true, override, NULL)) < 0 && r != -EBADR)
1420 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
1421 if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, !override, override, NULL)) < 0 && r != -EBADR)
1422 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, strerror(-r));
1424 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_CONFLICTS], i)
1425 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, true, override, NULL)) < 0 && r != -EBADR)
1428 } else if (type == JOB_STOP || type == JOB_RESTART || type == JOB_TRY_RESTART) {
1430 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRED_BY], i)
1431 if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, NULL)) < 0 && r != -EBADR)
1435 /* JOB_VERIFY_STARTED, JOB_RELOAD require no dependency handling */
1447 static int transaction_add_isolate_jobs(Manager *m) {
1455 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
1457 /* ignore aliases */
1458 if (u->meta.id != k)
1461 if (UNIT_VTABLE(u)->no_isolate)
1464 /* No need to stop inactive jobs */
1465 if (unit_active_state(u) == UNIT_INACTIVE)
1468 /* Is there already something listed for this? */
1469 if (hashmap_get(m->transaction_jobs, u))
1472 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, u, NULL, true, false, NULL)) < 0)
1473 log_warning("Cannot add isolate job for unit %s, ignoring: %s", u->meta.id, strerror(-r));
1479 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, Job **_ret) {
1484 assert(type < _JOB_TYPE_MAX);
1486 assert(mode < _JOB_MODE_MAX);
1488 if (mode == JOB_ISOLATE && type != JOB_START)
1491 log_debug("Trying to enqueue job %s/%s", unit->meta.id, job_type_to_string(type));
1493 if ((r = transaction_add_job_and_dependencies(m, type, unit, NULL, true, override, &ret)) < 0) {
1494 transaction_abort(m);
1498 if (mode == JOB_ISOLATE)
1499 if ((r = transaction_add_isolate_jobs(m)) < 0) {
1500 transaction_abort(m);
1504 if ((r = transaction_activate(m, mode)) < 0)
1507 log_debug("Enqueued job %s/%s as %u", unit->meta.id, job_type_to_string(type), (unsigned) ret->id);
1515 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, Job **_ret) {
1520 assert(type < _JOB_TYPE_MAX);
1522 assert(mode < _JOB_MODE_MAX);
1524 if ((r = manager_load_unit(m, name, NULL, &unit)) < 0)
1527 return manager_add_job(m, type, unit, mode, override, _ret);
1530 Job *manager_get_job(Manager *m, uint32_t id) {
1533 return hashmap_get(m->jobs, UINT32_TO_PTR(id));
1536 Unit *manager_get_unit(Manager *m, const char *name) {
1540 return hashmap_get(m->units, name);
1543 unsigned manager_dispatch_load_queue(Manager *m) {
1549 /* Make sure we are not run recursively */
1550 if (m->dispatching_load_queue)
1553 m->dispatching_load_queue = true;
1555 /* Dispatches the load queue. Takes a unit from the queue and
1556 * tries to load its data until the queue is empty */
1558 while ((meta = m->load_queue)) {
1559 assert(meta->in_load_queue);
1561 unit_load(UNIT(meta));
1565 m->dispatching_load_queue = false;
1569 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, Unit **_ret) {
1574 assert(name || path);
1576 /* This will prepare the unit for loading, but not actually
1577 * load anything from disk. */
1579 if (path && !is_path(path))
1583 name = file_name_from_path(path);
1585 if (!unit_name_is_valid(name))
1588 if ((ret = manager_get_unit(m, name))) {
1593 if (!(ret = unit_new(m)))
1597 if (!(ret->meta.fragment_path = strdup(path))) {
1602 if ((r = unit_add_name(ret, name)) < 0) {
1607 unit_add_to_load_queue(ret);
1608 unit_add_to_dbus_queue(ret);
1609 unit_add_to_gc_queue(ret);
1617 int manager_load_unit(Manager *m, const char *name, const char *path, Unit **_ret) {
1622 /* This will load the service information files, but not actually
1623 * start any services or anything. */
1625 if ((r = manager_load_unit_prepare(m, name, path, _ret)) != 0)
1628 manager_dispatch_load_queue(m);
1631 *_ret = unit_follow_merge(*_ret);
1636 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix) {
1643 HASHMAP_FOREACH(j, s->jobs, i)
1644 job_dump(j, f, prefix);
1647 void manager_dump_units(Manager *s, FILE *f, const char *prefix) {
1655 HASHMAP_FOREACH_KEY(u, t, s->units, i)
1656 if (u->meta.id == t)
1657 unit_dump(u, f, prefix);
1660 void manager_clear_jobs(Manager *m) {
1665 transaction_abort(m);
1667 while ((j = hashmap_first(m->jobs)))
1671 unsigned manager_dispatch_run_queue(Manager *m) {
1675 if (m->dispatching_run_queue)
1678 m->dispatching_run_queue = true;
1680 while ((j = m->run_queue)) {
1681 assert(j->installed);
1682 assert(j->in_run_queue);
1684 job_run_and_invalidate(j);
1688 m->dispatching_run_queue = false;
1692 unsigned manager_dispatch_dbus_queue(Manager *m) {
1699 if (m->dispatching_dbus_queue)
1702 m->dispatching_dbus_queue = true;
1704 while ((meta = m->dbus_unit_queue)) {
1705 assert(meta->in_dbus_queue);
1707 bus_unit_send_change_signal(UNIT(meta));
1711 while ((j = m->dbus_job_queue)) {
1712 assert(j->in_dbus_queue);
1714 bus_job_send_change_signal(j);
1718 m->dispatching_dbus_queue = false;
1722 static int manager_dispatch_sigchld(Manager *m) {
1731 /* First we call waitd() for a PID and do not reap the
1732 * zombie. That way we can still access /proc/$PID for
1733 * it while it is a zombie. */
1734 if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) {
1736 if (errno == ECHILD)
1748 if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) {
1751 get_process_name(si.si_pid, &name);
1752 log_debug("Got SIGCHLD for process %llu (%s)", (unsigned long long) si.si_pid, strna(name));
1756 /* And now, we actually reap the zombie. */
1757 if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {
1764 if (si.si_code != CLD_EXITED && si.si_code != CLD_KILLED && si.si_code != CLD_DUMPED)
1767 log_debug("Child %llu died (code=%s, status=%i/%s)",
1768 (long long unsigned) si.si_pid,
1769 sigchld_code_to_string(si.si_code),
1771 strna(si.si_code == CLD_EXITED ? exit_status_to_string(si.si_status) : strsignal(si.si_status)));
1773 if (!(u = hashmap_remove(m->watch_pids, UINT32_TO_PTR(si.si_pid))))
1776 log_debug("Child %llu belongs to %s", (long long unsigned) si.si_pid, u->meta.id);
1778 UNIT_VTABLE(u)->sigchld_event(u, si.si_pid, si.si_code, si.si_status);
1784 static void manager_start_target(Manager *m, const char *name) {
1787 if ((r = manager_add_job_by_name(m, JOB_START, name, JOB_REPLACE, true, NULL)) < 0)
1788 log_error("Failed to enqueue %s job: %s", name, strerror(-r));
1791 static int manager_process_signal_fd(Manager *m) {
1793 struct signalfd_siginfo sfsi;
1794 bool sigchld = false;
1799 if ((n = read(m->signal_watch.fd, &sfsi, sizeof(sfsi))) != sizeof(sfsi)) {
1804 if (errno == EAGAIN)
1810 switch (sfsi.ssi_signo) {
1817 if (m->running_as == MANAGER_INIT)
1818 /* This is for compatibility with the
1819 * original sysvinit */
1820 m->exit_code = MANAGER_REEXECUTE;
1822 m->exit_code = MANAGER_EXIT;
1827 if (m->running_as == MANAGER_INIT) {
1828 manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET);
1832 m->exit_code = MANAGER_EXIT;
1836 if (m->running_as == MANAGER_INIT)
1837 manager_start_target(m, SPECIAL_KBREQUEST_TARGET);
1839 /* This is a nop on non-init */
1843 if (m->running_as == MANAGER_INIT)
1844 manager_start_target(m, SPECIAL_SIGPWR_TARGET);
1846 /* This is a nop on non-init */
1852 u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);
1854 if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) {
1855 log_info("Trying to reconnect to bus...");
1860 if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) {
1861 log_info("Loading D-Bus service...");
1862 manager_start_target(m, SPECIAL_DBUS_SERVICE);
1869 manager_dump_units(m, stdout, "\t");
1870 manager_dump_jobs(m, stdout, "\t");
1874 m->exit_code = MANAGER_RELOAD;
1878 log_info("Got unhandled signal <%s>.", strsignal(sfsi.ssi_signo));
1883 return manager_dispatch_sigchld(m);
1888 static int process_event(Manager *m, struct epoll_event *ev) {
1895 assert(w = ev->data.ptr);
1901 /* An incoming signal? */
1902 if (ev->events != EPOLLIN)
1905 if ((r = manager_process_signal_fd(m)) < 0)
1912 /* Some fd event, to be dispatched to the units */
1913 UNIT_VTABLE(w->data.unit)->fd_event(w->data.unit, w->fd, ev->events, w);
1920 /* Some timer event, to be dispatched to the units */
1921 if ((k = read(w->fd, &v, sizeof(v))) != sizeof(v)) {
1923 if (k < 0 && (errno == EINTR || errno == EAGAIN))
1926 return k < 0 ? -errno : -EIO;
1929 UNIT_VTABLE(w->data.unit)->timer_event(w->data.unit, v, w);
1934 /* Some mount table change, intended for the mount subsystem */
1935 mount_fd_event(m, ev->events);
1939 /* Some notification from udev, intended for the device subsystem */
1940 device_fd_event(m, ev->events);
1943 case WATCH_DBUS_WATCH:
1944 bus_watch_event(m, w, ev->events);
1947 case WATCH_DBUS_TIMEOUT:
1948 bus_timeout_event(m, w, ev->events);
1952 assert_not_reached("Unknown epoll event type.");
1958 int manager_loop(Manager *m) {
1961 RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 1000);
1964 m->exit_code = MANAGER_RUNNING;
1966 /* There might still be some zombies hanging around from
1967 * before we were exec()'ed. Leat's reap them */
1968 if ((r = manager_dispatch_sigchld(m)) < 0)
1971 while (m->exit_code == MANAGER_RUNNING) {
1972 struct epoll_event event;
1975 if (!ratelimit_test(&rl)) {
1976 /* Yay, something is going seriously wrong, pause a little */
1977 log_warning("Looping too fast. Throttling execution a little.");
1981 if (manager_dispatch_load_queue(m) > 0)
1984 if (manager_dispatch_run_queue(m) > 0)
1987 if (bus_dispatch(m) > 0)
1990 if (manager_dispatch_cleanup_queue(m) > 0)
1993 if (manager_dispatch_gc_queue(m) > 0)
1996 if (manager_dispatch_dbus_queue(m) > 0)
1999 if ((n = epoll_wait(m->epoll_fd, &event, 1, -1)) < 0) {
2009 if ((r = process_event(m, &event)) < 0)
2013 return m->exit_code;
2016 int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u) {
2024 if (!startswith(s, "/org/freedesktop/systemd1/unit/"))
2027 if (!(n = bus_path_unescape(s+31)))
2030 u = manager_get_unit(m, n);
2041 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) {
2050 if (!startswith(s, "/org/freedesktop/systemd1/job/"))
2053 if ((r = safe_atou(s + 30, &id)) < 0)
2056 if (!(j = manager_get_job(m, id)))
2064 static bool manager_utmp_good(Manager *m) {
2069 if ((r = mount_path_is_mounted(m, _PATH_UTMPX)) <= 0) {
2072 log_warning("Failed to determine whether " _PATH_UTMPX " is mounted: %s", strerror(-r));
2080 void manager_write_utmp_reboot(Manager *m) {
2085 if (m->utmp_reboot_written)
2088 if (m->running_as != MANAGER_INIT)
2091 if (!manager_utmp_good(m))
2094 if ((r = utmp_put_reboot(m->boot_timestamp)) < 0) {
2096 if (r != -ENOENT && r != -EROFS)
2097 log_warning("Failed to write utmp/wtmp: %s", strerror(-r));
2102 m->utmp_reboot_written = true;
2105 void manager_write_utmp_runlevel(Manager *m, Unit *u) {
2111 if (u->meta.type != UNIT_TARGET)
2114 if (m->running_as != MANAGER_INIT)
2117 if (!manager_utmp_good(m))
2120 if ((runlevel = target_get_runlevel(TARGET(u))) <= 0)
2123 if ((r = utmp_put_runlevel(0, runlevel, 0)) < 0) {
2125 if (r != -ENOENT && r != -EROFS)
2126 log_warning("Failed to write utmp/wtmp: %s", strerror(-r));
2130 void manager_dispatch_bus_name_owner_changed(
2133 const char* old_owner,
2134 const char *new_owner) {
2141 if (!(u = hashmap_get(m->watch_bus, name)))
2144 UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner);
2147 void manager_dispatch_bus_query_pid_done(
2158 if (!(u = hashmap_get(m->watch_bus, name)))
2161 UNIT_VTABLE(u)->bus_query_pid_done(u, name, pid);
2164 int manager_open_serialization(FILE **_f) {
2172 if (asprintf(&path, "/dev/shm/systemd-%u.dump-XXXXXX", (unsigned) getpid()) < 0)
2175 saved_umask = umask(0077);
2176 fd = mkostemp(path, O_RDWR|O_CLOEXEC);
2186 log_debug("Serializing state to %s", path);
2189 if (!(f = fdopen(fd, "w+")) < 0)
2197 int manager_serialize(Manager *m, FILE *f, FDSet *fds) {
2207 HASHMAP_FOREACH_KEY(u, t, m->units, i) {
2208 if (u->meta.id != t)
2211 if (!unit_can_serialize(u))
2215 fputs(u->meta.id, f);
2218 if ((r = unit_serialize(u, f, fds)) < 0)
2228 int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
2234 log_debug("Deserializing state...");
2238 char name[UNIT_NAME_MAX+2];
2241 if (!fgets(name, sizeof(name), f)) {
2250 if ((r = manager_load_unit(m, strstrip(name), NULL, &u)) < 0)
2253 if ((r = unit_deserialize(u, f, fds)) < 0)
2263 int manager_reload(Manager *m) {
2270 if ((r = manager_open_serialization(&f)) < 0)
2273 if (!(fds = fdset_new())) {
2278 if ((r = manager_serialize(m, f, fds)) < 0)
2281 if (fseeko(f, 0, SEEK_SET) < 0) {
2286 /* From here on there is no way back. */
2287 manager_clear_jobs_and_units(m);
2289 /* First, enumerate what we can from all config files */
2290 if ((q = manager_enumerate(m)) < 0)
2293 /* Second, deserialize our stored data */
2294 if ((q = manager_deserialize(m, f, fds)) < 0)
2300 /* Third, fire things up! */
2301 if ((q = manager_coldplug(m)) < 0)
2314 static const char* const manager_running_as_table[_MANAGER_RUNNING_AS_MAX] = {
2315 [MANAGER_INIT] = "init",
2316 [MANAGER_SYSTEM] = "system",
2317 [MANAGER_SESSION] = "session"
2320 DEFINE_STRING_TABLE_LOOKUP(manager_running_as, ManagerRunningAs);