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>
27 #include <sys/signalfd.h>
31 #include <sys/reboot.h>
32 #include <sys/ioctl.h>
36 #include <sys/types.h>
50 #include "ratelimit.h"
52 #include "mount-setup.h"
53 #include "unit-name.h"
54 #include "dbus-unit.h"
57 #include "path-lookup.h"
59 #include "bus-errors.h"
60 #include "exit-status.h"
61 #include "sd-daemon.h"
64 /* As soon as 16 units are in our GC queue, make sure to run a gc sweep */
65 #define GC_QUEUE_ENTRIES_MAX 16
67 /* As soon as 5s passed since a unit was added to our GC queue, make sure to run a gc sweep */
68 #define GC_QUEUE_USEC_MAX (10*USEC_PER_SEC)
70 /* Where clients shall send notification messages to */
71 #define NOTIFY_SOCKET_SYSTEM "/run/systemd/notify"
72 #define NOTIFY_SOCKET_USER "@/org/freedesktop/systemd1/notify"
74 static int manager_setup_notify(Manager *m) {
77 struct sockaddr_un un;
79 struct epoll_event ev;
85 m->notify_watch.type = WATCH_NOTIFY;
86 if ((m->notify_watch.fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
87 log_error("Failed to allocate notification socket: %m");
92 sa.sa.sa_family = AF_UNIX;
95 snprintf(sa.un.sun_path, sizeof(sa.un.sun_path), NOTIFY_SOCKET_USER "/%llu", random_ull());
97 unlink(NOTIFY_SOCKET_SYSTEM);
98 strncpy(sa.un.sun_path, NOTIFY_SOCKET_SYSTEM, sizeof(sa.un.sun_path));
101 if (sa.un.sun_path[0] == '@')
102 sa.un.sun_path[0] = 0;
105 r = bind(m->notify_watch.fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1));
109 log_error("bind() failed: %m");
113 if (setsockopt(m->notify_watch.fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) {
114 log_error("SO_PASSCRED failed: %m");
120 ev.data.ptr = &m->notify_watch;
122 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->notify_watch.fd, &ev) < 0)
125 if (sa.un.sun_path[0] == 0)
126 sa.un.sun_path[0] = '@';
128 if (!(m->notify_socket = strdup(sa.un.sun_path)))
131 log_debug("Using notification socket %s", m->notify_socket);
136 static int enable_special_signals(Manager *m) {
141 /* Enable that we get SIGINT on control-alt-del */
142 if (reboot(RB_DISABLE_CAD) < 0)
143 log_warning("Failed to enable ctrl-alt-del handling: %m");
145 if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
146 log_warning("Failed to open /dev/tty0: %m");
148 /* Enable that we get SIGWINCH on kbrequest */
149 if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
150 log_warning("Failed to enable kbrequest handling: %s", strerror(errno));
152 close_nointr_nofail(fd);
158 static int manager_setup_signals(Manager *m) {
160 struct epoll_event ev;
165 /* We are not interested in SIGSTOP and friends. */
167 sa.sa_handler = SIG_DFL;
168 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
169 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
171 assert_se(sigemptyset(&mask) == 0);
173 sigset_add_many(&mask,
174 SIGCHLD, /* Child died */
175 SIGTERM, /* Reexecute daemon */
176 SIGHUP, /* Reload configuration */
177 SIGUSR1, /* systemd/upstart: reconnect to D-Bus */
178 SIGUSR2, /* systemd: dump status */
179 SIGINT, /* Kernel sends us this on control-alt-del */
180 SIGWINCH, /* Kernel sends us this on kbrequest (alt-arrowup) */
181 SIGPWR, /* Some kernel drivers and upsd send us this on power failure */
182 SIGRTMIN+0, /* systemd: start default.target */
183 SIGRTMIN+1, /* systemd: isolate rescue.target */
184 SIGRTMIN+2, /* systemd: isolate emergency.target */
185 SIGRTMIN+3, /* systemd: start halt.target */
186 SIGRTMIN+4, /* systemd: start poweroff.target */
187 SIGRTMIN+5, /* systemd: start reboot.target */
188 SIGRTMIN+6, /* systemd: start kexec.target */
189 SIGRTMIN+13, /* systemd: Immediate halt */
190 SIGRTMIN+14, /* systemd: Immediate poweroff */
191 SIGRTMIN+15, /* systemd: Immediate reboot */
192 SIGRTMIN+16, /* systemd: Immediate kexec */
193 SIGRTMIN+20, /* systemd: enable status messages */
194 SIGRTMIN+21, /* systemd: disable status messages */
195 SIGRTMIN+22, /* systemd: set log level to LOG_DEBUG */
196 SIGRTMIN+23, /* systemd: set log level to LOG_INFO */
197 SIGRTMIN+27, /* systemd: set log target to console */
198 SIGRTMIN+28, /* systemd: set log target to kmsg */
199 SIGRTMIN+29, /* systemd: set log target to syslog-or-kmsg */
201 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
203 m->signal_watch.type = WATCH_SIGNAL;
204 if ((m->signal_watch.fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC)) < 0)
209 ev.data.ptr = &m->signal_watch;
211 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->signal_watch.fd, &ev) < 0)
214 if (m->running_as == MANAGER_SYSTEM)
215 return enable_special_signals(m);
220 int manager_new(ManagerRunningAs running_as, Manager **_m) {
225 assert(running_as >= 0);
226 assert(running_as < _MANAGER_RUNNING_AS_MAX);
228 if (!(m = new0(Manager, 1)))
231 dual_timestamp_get(&m->startup_timestamp);
233 m->running_as = running_as;
234 m->name_data_slot = m->subscribed_data_slot = -1;
235 m->exit_code = _MANAGER_EXIT_CODE_INVALID;
236 m->pin_cgroupfs_fd = -1;
242 m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = m->dev_autofs_fd = m->swap_watch.fd = -1;
243 m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
245 if (!(m->environment = strv_copy(environ)))
248 if (!(m->default_controllers = strv_new("cpu", NULL)))
251 if (!(m->units = hashmap_new(string_hash_func, string_compare_func)))
254 if (!(m->jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))
257 if (!(m->transaction_jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))
260 if (!(m->watch_pids = hashmap_new(trivial_hash_func, trivial_compare_func)))
263 if (!(m->cgroup_bondings = hashmap_new(string_hash_func, string_compare_func)))
266 if (!(m->watch_bus = hashmap_new(string_hash_func, string_compare_func)))
269 if ((m->epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0)
272 if ((r = lookup_paths_init(&m->lookup_paths, m->running_as, true)) < 0)
275 if ((r = manager_setup_signals(m)) < 0)
278 if ((r = manager_setup_cgroup(m)) < 0)
281 if ((r = manager_setup_notify(m)) < 0)
284 /* Try to connect to the busses, if possible. */
285 if ((r = bus_init(m, running_as != MANAGER_SYSTEM)) < 0)
289 if ((m->audit_fd = audit_open()) < 0)
290 log_error("Failed to connect to audit log: %m");
293 m->taint_usr = dir_is_empty("/usr") > 0;
303 static unsigned manager_dispatch_cleanup_queue(Manager *m) {
309 while ((meta = m->cleanup_queue)) {
310 assert(meta->in_cleanup_queue);
312 unit_free((Unit*) meta);
320 GC_OFFSET_IN_PATH, /* This one is on the path we were traveling */
321 GC_OFFSET_UNSURE, /* No clue */
322 GC_OFFSET_GOOD, /* We still need this unit */
323 GC_OFFSET_BAD, /* We don't need this unit anymore */
327 static void unit_gc_sweep(Unit *u, unsigned gc_marker) {
334 if (u->meta.gc_marker == gc_marker + GC_OFFSET_GOOD ||
335 u->meta.gc_marker == gc_marker + GC_OFFSET_BAD ||
336 u->meta.gc_marker == gc_marker + GC_OFFSET_IN_PATH)
339 if (u->meta.in_cleanup_queue)
342 if (unit_check_gc(u))
345 u->meta.gc_marker = gc_marker + GC_OFFSET_IN_PATH;
349 SET_FOREACH(other, u->meta.dependencies[UNIT_REFERENCED_BY], i) {
350 unit_gc_sweep(other, gc_marker);
352 if (other->meta.gc_marker == gc_marker + GC_OFFSET_GOOD)
355 if (other->meta.gc_marker != gc_marker + GC_OFFSET_BAD)
362 /* We were unable to find anything out about this entry, so
363 * let's investigate it later */
364 u->meta.gc_marker = gc_marker + GC_OFFSET_UNSURE;
365 unit_add_to_gc_queue(u);
369 /* We definitely know that this one is not useful anymore, so
370 * let's mark it for deletion */
371 u->meta.gc_marker = gc_marker + GC_OFFSET_BAD;
372 unit_add_to_cleanup_queue(u);
376 u->meta.gc_marker = gc_marker + GC_OFFSET_GOOD;
379 static unsigned manager_dispatch_gc_queue(Manager *m) {
386 if ((m->n_in_gc_queue < GC_QUEUE_ENTRIES_MAX) &&
387 (m->gc_queue_timestamp <= 0 ||
388 (m->gc_queue_timestamp + GC_QUEUE_USEC_MAX) > now(CLOCK_MONOTONIC)))
391 log_debug("Running GC...");
393 m->gc_marker += _GC_OFFSET_MAX;
394 if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX)
397 gc_marker = m->gc_marker;
399 while ((meta = m->gc_queue)) {
400 assert(meta->in_gc_queue);
402 unit_gc_sweep((Unit*) meta, gc_marker);
404 LIST_REMOVE(Meta, gc_queue, m->gc_queue, meta);
405 meta->in_gc_queue = false;
409 if (meta->gc_marker == gc_marker + GC_OFFSET_BAD ||
410 meta->gc_marker == gc_marker + GC_OFFSET_UNSURE) {
411 log_debug("Collecting %s", meta->id);
412 meta->gc_marker = gc_marker + GC_OFFSET_BAD;
413 unit_add_to_cleanup_queue((Unit*) meta);
417 m->n_in_gc_queue = 0;
418 m->gc_queue_timestamp = 0;
423 static void manager_clear_jobs_and_units(Manager *m) {
429 while ((j = hashmap_first(m->transaction_jobs)))
432 while ((u = hashmap_first(m->units)))
435 manager_dispatch_cleanup_queue(m);
437 assert(!m->load_queue);
438 assert(!m->run_queue);
439 assert(!m->dbus_unit_queue);
440 assert(!m->dbus_job_queue);
441 assert(!m->cleanup_queue);
442 assert(!m->gc_queue);
444 assert(hashmap_isempty(m->transaction_jobs));
445 assert(hashmap_isempty(m->jobs));
446 assert(hashmap_isempty(m->units));
449 void manager_free(Manager *m) {
454 manager_clear_jobs_and_units(m);
456 for (c = 0; c < _UNIT_TYPE_MAX; c++)
457 if (unit_vtable[c]->shutdown)
458 unit_vtable[c]->shutdown(m);
460 /* If we reexecute ourselves, we keep the root cgroup
462 manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE);
464 manager_undo_generators(m);
468 hashmap_free(m->units);
469 hashmap_free(m->jobs);
470 hashmap_free(m->transaction_jobs);
471 hashmap_free(m->watch_pids);
472 hashmap_free(m->watch_bus);
474 if (m->epoll_fd >= 0)
475 close_nointr_nofail(m->epoll_fd);
476 if (m->signal_watch.fd >= 0)
477 close_nointr_nofail(m->signal_watch.fd);
478 if (m->notify_watch.fd >= 0)
479 close_nointr_nofail(m->notify_watch.fd);
482 if (m->audit_fd >= 0)
483 audit_close(m->audit_fd);
486 free(m->notify_socket);
488 lookup_paths_free(&m->lookup_paths);
489 strv_free(m->environment);
491 strv_free(m->default_controllers);
493 hashmap_free(m->cgroup_bondings);
494 set_free_free(m->unit_path_cache);
499 int manager_enumerate(Manager *m) {
505 /* Let's ask every type to load all units from disk/kernel
506 * that it might know */
507 for (c = 0; c < _UNIT_TYPE_MAX; c++)
508 if (unit_vtable[c]->enumerate)
509 if ((q = unit_vtable[c]->enumerate(m)) < 0)
512 manager_dispatch_load_queue(m);
516 int manager_coldplug(Manager *m) {
524 /* Then, let's set up their initial state. */
525 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
531 if ((q = unit_coldplug(u)) < 0)
538 static void manager_build_unit_path_cache(Manager *m) {
545 set_free_free(m->unit_path_cache);
547 if (!(m->unit_path_cache = set_new(string_hash_func, string_compare_func))) {
548 log_error("Failed to allocate unit path cache.");
552 /* This simply builds a list of files we know exist, so that
553 * we don't always have to go to disk */
555 STRV_FOREACH(i, m->lookup_paths.unit_path) {
558 if (!(d = opendir(*i))) {
559 log_error("Failed to open directory: %m");
563 while ((de = readdir(d))) {
566 if (ignore_file(de->d_name))
569 p = join(streq(*i, "/") ? "" : *i, "/", de->d_name, NULL);
575 if ((r = set_put(m->unit_path_cache, p)) < 0) {
588 log_error("Failed to build unit path cache: %s", strerror(-r));
590 set_free_free(m->unit_path_cache);
591 m->unit_path_cache = NULL;
597 int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {
602 manager_run_generators(m);
604 manager_build_unit_path_cache(m);
606 /* If we will deserialize make sure that during enumeration
607 * this is already known, so we increase the counter here
612 /* First, enumerate what we can from all config files */
613 r = manager_enumerate(m);
615 /* Second, deserialize if there is something to deserialize */
617 if ((q = manager_deserialize(m, serialization, fds)) < 0)
620 /* Third, fire things up! */
621 if ((q = manager_coldplug(m)) < 0)
625 assert(m->n_reloading > 0);
632 static void transaction_delete_job(Manager *m, Job *j, bool delete_dependencies) {
636 /* Deletes one job from the transaction */
638 manager_transaction_unlink_job(m, j, delete_dependencies);
644 static void transaction_delete_unit(Manager *m, Unit *u) {
647 /* Deletes all jobs associated with a certain unit from the
650 while ((j = hashmap_get(m->transaction_jobs, u)))
651 transaction_delete_job(m, j, true);
654 static void transaction_clean_dependencies(Manager *m) {
660 /* Drops all dependencies of all installed jobs */
662 HASHMAP_FOREACH(j, m->jobs, i) {
663 while (j->subject_list)
664 job_dependency_free(j->subject_list);
665 while (j->object_list)
666 job_dependency_free(j->object_list);
669 assert(!m->transaction_anchor);
672 static void transaction_abort(Manager *m) {
677 while ((j = hashmap_first(m->transaction_jobs)))
679 transaction_delete_job(m, j, true);
683 assert(hashmap_isempty(m->transaction_jobs));
685 transaction_clean_dependencies(m);
688 static void transaction_find_jobs_that_matter_to_anchor(Manager *m, Job *j, unsigned generation) {
693 /* A recursive sweep through the graph that marks all units
694 * that matter to the anchor job, i.e. are directly or
695 * indirectly a dependency of the anchor job via paths that
696 * are fully marked as mattering. */
701 l = m->transaction_anchor;
703 LIST_FOREACH(subject, l, l) {
705 /* This link does not matter */
709 /* This unit has already been marked */
710 if (l->object->generation == generation)
713 l->object->matters_to_anchor = true;
714 l->object->generation = generation;
716 transaction_find_jobs_that_matter_to_anchor(m, l->object, generation);
720 static void transaction_merge_and_delete_job(Manager *m, Job *j, Job *other, JobType t) {
721 JobDependency *l, *last;
725 assert(j->unit == other->unit);
726 assert(!j->installed);
728 /* Merges 'other' into 'j' and then deletes j. */
731 j->state = JOB_WAITING;
732 j->override = j->override || other->override;
734 j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor;
736 /* Patch us in as new owner of the JobDependency objects */
738 LIST_FOREACH(subject, l, other->subject_list) {
739 assert(l->subject == other);
744 /* Merge both lists */
746 last->subject_next = j->subject_list;
748 j->subject_list->subject_prev = last;
749 j->subject_list = other->subject_list;
752 /* Patch us in as new owner of the JobDependency objects */
754 LIST_FOREACH(object, l, other->object_list) {
755 assert(l->object == other);
760 /* Merge both lists */
762 last->object_next = j->object_list;
764 j->object_list->object_prev = last;
765 j->object_list = other->object_list;
768 /* Kill the other job */
769 other->subject_list = NULL;
770 other->object_list = NULL;
771 transaction_delete_job(m, other, true);
773 static bool job_is_conflicted_by(Job *j) {
778 /* Returns true if this job is pulled in by a least one
779 * ConflictedBy dependency. */
781 LIST_FOREACH(object, l, j->object_list)
788 static int delete_one_unmergeable_job(Manager *m, Job *j) {
793 /* Tries to delete one item in the linked list
794 * j->transaction_next->transaction_next->... that conflicts
795 * with another one, in an attempt to make an inconsistent
796 * transaction work. */
798 /* We rely here on the fact that if a merged with b does not
799 * merge with c, either a or b merge with c neither */
800 LIST_FOREACH(transaction, j, j)
801 LIST_FOREACH(transaction, k, j->transaction_next) {
804 /* Is this one mergeable? Then skip it */
805 if (job_type_is_mergeable(j->type, k->type))
808 /* Ok, we found two that conflict, let's see if we can
809 * drop one of them */
810 if (!j->matters_to_anchor && !k->matters_to_anchor) {
812 /* Both jobs don't matter, so let's
813 * find the one that is smarter to
814 * remove. Let's think positive and
815 * rather remove stops then starts --
816 * except if something is being
817 * stopped because it is conflicted by
818 * another unit in which case we
819 * rather remove the start. */
821 log_debug("Looking at job %s/%s conflicted_by=%s", j->unit->meta.id, job_type_to_string(j->type), yes_no(j->type == JOB_STOP && job_is_conflicted_by(j)));
822 log_debug("Looking at job %s/%s conflicted_by=%s", k->unit->meta.id, job_type_to_string(k->type), yes_no(k->type == JOB_STOP && job_is_conflicted_by(k)));
824 if (j->type == JOB_STOP) {
826 if (job_is_conflicted_by(j))
831 } else if (k->type == JOB_STOP) {
833 if (job_is_conflicted_by(k))
840 } else if (!j->matters_to_anchor)
842 else if (!k->matters_to_anchor)
847 /* Ok, we can drop one, so let's do so. */
848 log_debug("Fixing conflicting jobs by deleting job %s/%s", d->unit->meta.id, job_type_to_string(d->type));
849 transaction_delete_job(m, d, true);
856 static int transaction_merge_jobs(Manager *m, DBusError *e) {
863 /* First step, check whether any of the jobs for one specific
864 * task conflict. If so, try to drop one of them. */
865 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
870 LIST_FOREACH(transaction, k, j->transaction_next) {
871 if (job_type_merge(&t, k->type) >= 0)
874 /* OK, we could not merge all jobs for this
875 * action. Let's see if we can get rid of one
878 if ((r = delete_one_unmergeable_job(m, j)) >= 0)
879 /* Ok, we managed to drop one, now
880 * let's ask our callers to call us
881 * again after garbage collecting */
884 /* We couldn't merge anything. Failure */
885 dbus_set_error(e, BUS_ERROR_TRANSACTION_JOBS_CONFLICTING, "Transaction contains conflicting jobs '%s' and '%s' for %s. Probably contradicting requirement dependencies configured.",
886 job_type_to_string(t), job_type_to_string(k->type), k->unit->meta.id);
891 /* Second step, merge the jobs. */
892 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
896 /* Merge all transactions */
897 LIST_FOREACH(transaction, k, j->transaction_next)
898 assert_se(job_type_merge(&t, k->type) == 0);
900 /* If an active job is mergeable, merge it too */
901 if (j->unit->meta.job)
902 job_type_merge(&t, j->unit->meta.job->type); /* Might fail. Which is OK */
904 while ((k = j->transaction_next)) {
906 transaction_merge_and_delete_job(m, k, j, t);
909 transaction_merge_and_delete_job(m, j, k, t);
912 if (j->unit->meta.job && !j->installed)
913 transaction_merge_and_delete_job(m, j, j->unit->meta.job, t);
915 assert(!j->transaction_next);
916 assert(!j->transaction_prev);
922 static void transaction_drop_redundant(Manager *m) {
927 /* Goes through the transaction and removes all jobs that are
936 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
937 bool changes_something = false;
940 LIST_FOREACH(transaction, k, j) {
942 if (!job_is_anchor(k) &&
943 (k->installed || job_type_is_redundant(k->type, unit_active_state(k->unit))) &&
944 (!k->unit->meta.job || !job_type_is_conflicting(k->type, k->unit->meta.job->type)))
947 changes_something = true;
951 if (changes_something)
954 /* log_debug("Found redundant job %s/%s, dropping.", j->unit->meta.id, job_type_to_string(j->type)); */
955 transaction_delete_job(m, j, false);
963 static bool unit_matters_to_anchor(Unit *u, Job *j) {
965 assert(!j->transaction_prev);
967 /* Checks whether at least one of the jobs for this unit
968 * matters to the anchor. */
970 LIST_FOREACH(transaction, j, j)
971 if (j->matters_to_anchor)
977 static int transaction_verify_order_one(Manager *m, Job *j, Job *from, unsigned generation, DBusError *e) {
984 assert(!j->transaction_prev);
986 /* Does a recursive sweep through the ordering graph, looking
987 * for a cycle. If we find cycle we try to break it. */
989 /* Have we seen this before? */
990 if (j->generation == generation) {
993 /* If the marker is NULL we have been here already and
994 * decided the job was loop-free from here. Hence
995 * shortcut things and return right-away. */
999 /* So, the marker is not NULL and we already have been
1000 * here. We have a cycle. Let's try to break it. We go
1001 * backwards in our path and try to find a suitable
1002 * job to remove. We use the marker to find our way
1003 * back, since smart how we are we stored our way back
1005 log_warning("Found ordering cycle on %s/%s", j->unit->meta.id, job_type_to_string(j->type));
1008 for (k = from; k; k = ((k->generation == generation && k->marker != k) ? k->marker : NULL)) {
1010 log_info("Walked on cycle path to %s/%s", k->unit->meta.id, job_type_to_string(k->type));
1014 !unit_matters_to_anchor(k->unit, k)) {
1015 /* Ok, we can drop this one, so let's
1020 /* Check if this in fact was the beginning of
1028 log_warning("Breaking ordering cycle by deleting job %s/%s", delete->unit->meta.id, job_type_to_string(delete->type));
1029 transaction_delete_unit(m, delete->unit);
1033 log_error("Unable to break cycle");
1035 dbus_set_error(e, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC, "Transaction order is cyclic. See system logs for details.");
1039 /* Make the marker point to where we come from, so that we can
1040 * find our way backwards if we want to break a cycle. We use
1041 * a special marker for the beginning: we point to
1043 j->marker = from ? from : j;
1044 j->generation = generation;
1046 /* We assume that the the dependencies are bidirectional, and
1047 * hence can ignore UNIT_AFTER */
1048 SET_FOREACH(u, j->unit->meta.dependencies[UNIT_BEFORE], i) {
1051 /* Is there a job for this unit? */
1052 if (!(o = hashmap_get(m->transaction_jobs, u)))
1054 /* Ok, there is no job for this in the
1055 * transaction, but maybe there is already one
1057 if (!(o = u->meta.job))
1060 if ((r = transaction_verify_order_one(m, o, j, generation, e)) < 0)
1064 /* Ok, let's backtrack, and remember that this entry is not on
1065 * our path anymore. */
1071 static int transaction_verify_order(Manager *m, unsigned *generation, DBusError *e) {
1080 /* Check if the ordering graph is cyclic. If it is, try to fix
1081 * that up by dropping one of the jobs. */
1083 g = (*generation)++;
1085 HASHMAP_FOREACH(j, m->transaction_jobs, i)
1086 if ((r = transaction_verify_order_one(m, j, NULL, g, e)) < 0)
1092 static void transaction_collect_garbage(Manager *m) {
1097 /* Drop jobs that are not required by any other job */
1105 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1106 if (j->object_list) {
1107 /* log_debug("Keeping job %s/%s because of %s/%s", */
1108 /* j->unit->meta.id, job_type_to_string(j->type), */
1109 /* j->object_list->subject ? j->object_list->subject->unit->meta.id : "root", */
1110 /* j->object_list->subject ? job_type_to_string(j->object_list->subject->type) : "root"); */
1114 /* log_debug("Garbage collecting job %s/%s", j->unit->meta.id, job_type_to_string(j->type)); */
1115 transaction_delete_job(m, j, true);
1123 static int transaction_is_destructive(Manager *m, DBusError *e) {
1129 /* Checks whether applying this transaction means that
1130 * existing jobs would be replaced */
1132 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1135 assert(!j->transaction_prev);
1136 assert(!j->transaction_next);
1138 if (j->unit->meta.job &&
1139 j->unit->meta.job != j &&
1140 !job_type_is_superset(j->type, j->unit->meta.job->type)) {
1142 dbus_set_error(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE, "Transaction is destructive.");
1150 static void transaction_minimize_impact(Manager *m) {
1154 /* Drops all unnecessary jobs that reverse already active jobs
1155 * or that stop a running service. */
1163 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1164 LIST_FOREACH(transaction, j, j) {
1165 bool stops_running_service, changes_existing_job;
1167 /* If it matters, we shouldn't drop it */
1168 if (j->matters_to_anchor)
1171 /* Would this stop a running service?
1172 * Would this change an existing job?
1173 * If so, let's drop this entry */
1175 stops_running_service =
1176 j->type == JOB_STOP && UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j->unit));
1178 changes_existing_job =
1179 j->unit->meta.job &&
1180 job_type_is_conflicting(j->type, j->unit->meta.job->type);
1182 if (!stops_running_service && !changes_existing_job)
1185 if (stops_running_service)
1186 log_debug("%s/%s would stop a running service.", j->unit->meta.id, job_type_to_string(j->type));
1188 if (changes_existing_job)
1189 log_debug("%s/%s would change existing job.", j->unit->meta.id, job_type_to_string(j->type));
1191 /* Ok, let's get rid of this */
1192 log_debug("Deleting %s/%s to minimize impact.", j->unit->meta.id, job_type_to_string(j->type));
1194 transaction_delete_job(m, j, true);
1206 static int transaction_apply(Manager *m, JobMode mode) {
1211 /* Moves the transaction jobs to the set of active jobs */
1213 if (mode == JOB_ISOLATE) {
1215 /* When isolating first kill all installed jobs which
1216 * aren't part of the new transaction */
1217 HASHMAP_FOREACH(j, m->jobs, i) {
1218 assert(j->installed);
1220 if (hashmap_get(m->transaction_jobs, j->unit))
1223 job_finish_and_invalidate(j, JOB_CANCELED);
1227 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1229 assert(!j->transaction_prev);
1230 assert(!j->transaction_next);
1235 if ((r = hashmap_put(m->jobs, UINT32_TO_PTR(j->id), j)) < 0)
1239 while ((j = hashmap_steal_first(m->transaction_jobs))) {
1241 /* log_debug("Skipping already installed job %s/%s as %u", j->unit->meta.id, job_type_to_string(j->type), (unsigned) j->id); */
1245 if (j->unit->meta.job)
1246 job_free(j->unit->meta.job);
1248 j->unit->meta.job = j;
1249 j->installed = true;
1250 m->n_installed_jobs ++;
1252 /* We're fully installed. Now let's free data we don't
1255 assert(!j->transaction_next);
1256 assert(!j->transaction_prev);
1258 job_add_to_run_queue(j);
1259 job_add_to_dbus_queue(j);
1262 log_debug("Installed new job %s/%s as %u", j->unit->meta.id, job_type_to_string(j->type), (unsigned) j->id);
1265 /* As last step, kill all remaining job dependencies. */
1266 transaction_clean_dependencies(m);
1272 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1276 hashmap_remove(m->jobs, UINT32_TO_PTR(j->id));
1282 static int transaction_activate(Manager *m, JobMode mode, DBusError *e) {
1284 unsigned generation = 1;
1288 /* This applies the changes recorded in transaction_jobs to
1289 * the actual list of jobs, if possible. */
1291 /* First step: figure out which jobs matter */
1292 transaction_find_jobs_that_matter_to_anchor(m, NULL, generation++);
1294 /* Second step: Try not to stop any running services if
1295 * we don't have to. Don't try to reverse running
1296 * jobs if we don't have to. */
1297 if (mode == JOB_FAIL)
1298 transaction_minimize_impact(m);
1300 /* Third step: Drop redundant jobs */
1301 transaction_drop_redundant(m);
1304 /* Fourth step: Let's remove unneeded jobs that might
1306 if (mode != JOB_ISOLATE)
1307 transaction_collect_garbage(m);
1309 /* Fifth step: verify order makes sense and correct
1310 * cycles if necessary and possible */
1311 if ((r = transaction_verify_order(m, &generation, e)) >= 0)
1315 log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error(e, r));
1319 /* Let's see if the resulting transaction ordering
1320 * graph is still cyclic... */
1324 /* Sixth step: let's drop unmergeable entries if
1325 * necessary and possible, merge entries we can
1327 if ((r = transaction_merge_jobs(m, e)) >= 0)
1331 log_warning("Requested transaction contains unmergeable jobs: %s", bus_error(e, r));
1335 /* Seventh step: an entry got dropped, let's garbage
1336 * collect its dependencies. */
1337 if (mode != JOB_ISOLATE)
1338 transaction_collect_garbage(m);
1340 /* Let's see if the resulting transaction still has
1341 * unmergeable entries ... */
1344 /* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */
1345 transaction_drop_redundant(m);
1347 /* Ninth step: check whether we can actually apply this */
1348 if (mode == JOB_FAIL)
1349 if ((r = transaction_is_destructive(m, e)) < 0) {
1350 log_notice("Requested transaction contradicts existing jobs: %s", bus_error(e, r));
1354 /* Tenth step: apply changes */
1355 if ((r = transaction_apply(m, mode)) < 0) {
1356 log_warning("Failed to apply transaction: %s", strerror(-r));
1360 assert(hashmap_isempty(m->transaction_jobs));
1361 assert(!m->transaction_anchor);
1366 transaction_abort(m);
1370 static Job* transaction_add_one_job(Manager *m, JobType type, Unit *unit, bool override, bool *is_new) {
1376 /* Looks for an existing prospective job and returns that. If
1377 * it doesn't exist it is created and added to the prospective
1380 f = hashmap_get(m->transaction_jobs, unit);
1382 LIST_FOREACH(transaction, j, f) {
1383 assert(j->unit == unit);
1385 if (j->type == type) {
1392 if (unit->meta.job && unit->meta.job->type == type)
1394 else if (!(j = job_new(m, type, unit)))
1399 j->matters_to_anchor = false;
1400 j->override = override;
1402 LIST_PREPEND(Job, transaction, f, j);
1404 if (hashmap_replace(m->transaction_jobs, unit, f) < 0) {
1412 /* log_debug("Added job %s/%s to transaction.", unit->meta.id, job_type_to_string(type)); */
1417 void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies) {
1421 if (j->transaction_prev)
1422 j->transaction_prev->transaction_next = j->transaction_next;
1423 else if (j->transaction_next)
1424 hashmap_replace(m->transaction_jobs, j->unit, j->transaction_next);
1426 hashmap_remove_value(m->transaction_jobs, j->unit, j);
1428 if (j->transaction_next)
1429 j->transaction_next->transaction_prev = j->transaction_prev;
1431 j->transaction_prev = j->transaction_next = NULL;
1433 while (j->subject_list)
1434 job_dependency_free(j->subject_list);
1436 while (j->object_list) {
1437 Job *other = j->object_list->matters ? j->object_list->subject : NULL;
1439 job_dependency_free(j->object_list);
1441 if (other && delete_dependencies) {
1442 log_debug("Deleting job %s/%s as dependency of job %s/%s",
1443 other->unit->meta.id, job_type_to_string(other->type),
1444 j->unit->meta.id, job_type_to_string(j->type));
1445 transaction_delete_job(m, other, delete_dependencies);
1450 static int transaction_add_job_and_dependencies(
1458 bool ignore_requirements,
1469 assert(type < _JOB_TYPE_MAX);
1472 /* log_debug("Pulling in %s/%s from %s/%s", */
1473 /* unit->meta.id, job_type_to_string(type), */
1474 /* by ? by->unit->meta.id : "NA", */
1475 /* by ? job_type_to_string(by->type) : "NA"); */
1477 if (unit->meta.load_state != UNIT_LOADED &&
1478 unit->meta.load_state != UNIT_ERROR &&
1479 unit->meta.load_state != UNIT_MASKED) {
1480 dbus_set_error(e, BUS_ERROR_LOAD_FAILED, "Unit %s is not loaded properly.", unit->meta.id);
1484 if (type != JOB_STOP && unit->meta.load_state == UNIT_ERROR) {
1485 dbus_set_error(e, BUS_ERROR_LOAD_FAILED,
1486 "Unit %s failed to load: %s. "
1487 "See system logs and 'systemctl status %s' for details.",
1489 strerror(-unit->meta.load_error),
1494 if (type != JOB_STOP && unit->meta.load_state == UNIT_MASKED) {
1495 dbus_set_error(e, BUS_ERROR_MASKED, "Unit %s is masked.", unit->meta.id);
1499 if (!unit_job_is_applicable(unit, type)) {
1500 dbus_set_error(e, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE, "Job type %s is not applicable for unit %s.", job_type_to_string(type), unit->meta.id);
1504 /* First add the job. */
1505 if (!(ret = transaction_add_one_job(m, type, unit, override, &is_new)))
1508 ret->ignore_order = ret->ignore_order || ignore_order;
1510 /* Then, add a link to the job. */
1511 if (!job_dependency_new(by, ret, matters, conflicts))
1514 if (is_new && !ignore_requirements) {
1517 /* If we are following some other unit, make sure we
1518 * add all dependencies of everybody following. */
1519 if (unit_following_set(ret->unit, &following) > 0) {
1520 SET_FOREACH(dep, following, i)
1521 if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, false, override, false, false, ignore_order, e, NULL)) < 0) {
1522 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, bus_error(e, r));
1528 set_free(following);
1531 /* Finally, recursively add in all dependencies. */
1532 if (type == JOB_START || type == JOB_RELOAD_OR_START) {
1533 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRES], i)
1534 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1542 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_BIND_TO], i)
1543 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1552 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1553 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, !override, override, false, false, ignore_order, e, NULL)) < 0) {
1554 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, bus_error(e, r));
1560 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_WANTS], i)
1561 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, false, false, false, false, ignore_order, e, NULL)) < 0) {
1562 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, bus_error(e, r));
1568 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUISITE], i)
1569 if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1578 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
1579 if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, !override, override, false, false, ignore_order, e, NULL)) < 0) {
1580 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, bus_error(e, r));
1586 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_CONFLICTS], i)
1587 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, true, override, true, false, ignore_order, e, NULL)) < 0) {
1596 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_CONFLICTED_BY], i)
1597 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, false, override, false, false, ignore_order, e, NULL)) < 0) {
1598 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, bus_error(e, r));
1604 } else if (type == JOB_STOP || type == JOB_RESTART || type == JOB_TRY_RESTART) {
1606 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRED_BY], i)
1607 if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1616 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_BOUND_BY], i)
1617 if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1627 /* JOB_VERIFY_STARTED, JOB_RELOAD require no dependency handling */
1639 static int transaction_add_isolate_jobs(Manager *m) {
1647 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
1649 /* ignore aliases */
1650 if (u->meta.id != k)
1653 if (u->meta.ignore_on_isolate)
1656 /* No need to stop inactive jobs */
1657 if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) && !u->meta.job)
1660 /* Is there already something listed for this? */
1661 if (hashmap_get(m->transaction_jobs, u))
1664 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, u, NULL, true, false, false, false, false, NULL, NULL)) < 0)
1665 log_warning("Cannot add isolate job for unit %s, ignoring: %s", u->meta.id, strerror(-r));
1671 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, DBusError *e, Job **_ret) {
1676 assert(type < _JOB_TYPE_MAX);
1678 assert(mode < _JOB_MODE_MAX);
1680 if (mode == JOB_ISOLATE && type != JOB_START) {
1681 dbus_set_error(e, BUS_ERROR_INVALID_JOB_MODE, "Isolate is only valid for start.");
1685 if (mode == JOB_ISOLATE && !unit->meta.allow_isolate) {
1686 dbus_set_error(e, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated.");
1690 log_debug("Trying to enqueue job %s/%s/%s", unit->meta.id, job_type_to_string(type), job_mode_to_string(mode));
1692 if ((r = transaction_add_job_and_dependencies(m, type, unit, NULL, true, override, false,
1693 mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS,
1694 mode == JOB_IGNORE_DEPENDENCIES, e, &ret)) < 0) {
1695 transaction_abort(m);
1699 if (mode == JOB_ISOLATE)
1700 if ((r = transaction_add_isolate_jobs(m)) < 0) {
1701 transaction_abort(m);
1705 if ((r = transaction_activate(m, mode, e)) < 0)
1708 log_debug("Enqueued job %s/%s as %u", unit->meta.id, job_type_to_string(type), (unsigned) ret->id);
1716 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, DBusError *e, Job **_ret) {
1721 assert(type < _JOB_TYPE_MAX);
1723 assert(mode < _JOB_MODE_MAX);
1725 if ((r = manager_load_unit(m, name, NULL, NULL, &unit)) < 0)
1728 return manager_add_job(m, type, unit, mode, override, e, _ret);
1731 Job *manager_get_job(Manager *m, uint32_t id) {
1734 return hashmap_get(m->jobs, UINT32_TO_PTR(id));
1737 Unit *manager_get_unit(Manager *m, const char *name) {
1741 return hashmap_get(m->units, name);
1744 unsigned manager_dispatch_load_queue(Manager *m) {
1750 /* Make sure we are not run recursively */
1751 if (m->dispatching_load_queue)
1754 m->dispatching_load_queue = true;
1756 /* Dispatches the load queue. Takes a unit from the queue and
1757 * tries to load its data until the queue is empty */
1759 while ((meta = m->load_queue)) {
1760 assert(meta->in_load_queue);
1762 unit_load((Unit*) meta);
1766 m->dispatching_load_queue = false;
1770 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret) {
1775 assert(name || path);
1777 /* This will prepare the unit for loading, but not actually
1778 * load anything from disk. */
1780 if (path && !is_path(path)) {
1781 dbus_set_error(e, BUS_ERROR_INVALID_PATH, "Path %s is not absolute.", path);
1786 name = file_name_from_path(path);
1788 if (!unit_name_is_valid(name, false)) {
1789 dbus_set_error(e, BUS_ERROR_INVALID_NAME, "Unit name %s is not valid.", name);
1793 if ((ret = manager_get_unit(m, name))) {
1798 if (!(ret = unit_new(m)))
1802 if (!(ret->meta.fragment_path = strdup(path))) {
1807 if ((r = unit_add_name(ret, name)) < 0) {
1812 unit_add_to_load_queue(ret);
1813 unit_add_to_dbus_queue(ret);
1814 unit_add_to_gc_queue(ret);
1822 int manager_load_unit(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret) {
1827 /* This will load the service information files, but not actually
1828 * start any services or anything. */
1830 if ((r = manager_load_unit_prepare(m, name, path, e, _ret)) != 0)
1833 manager_dispatch_load_queue(m);
1836 *_ret = unit_follow_merge(*_ret);
1841 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix) {
1848 HASHMAP_FOREACH(j, s->jobs, i)
1849 job_dump(j, f, prefix);
1852 void manager_dump_units(Manager *s, FILE *f, const char *prefix) {
1860 HASHMAP_FOREACH_KEY(u, t, s->units, i)
1861 if (u->meta.id == t)
1862 unit_dump(u, f, prefix);
1865 void manager_clear_jobs(Manager *m) {
1870 transaction_abort(m);
1872 while ((j = hashmap_first(m->jobs)))
1873 job_finish_and_invalidate(j, JOB_CANCELED);
1876 unsigned manager_dispatch_run_queue(Manager *m) {
1880 if (m->dispatching_run_queue)
1883 m->dispatching_run_queue = true;
1885 while ((j = m->run_queue)) {
1886 assert(j->installed);
1887 assert(j->in_run_queue);
1889 job_run_and_invalidate(j);
1893 m->dispatching_run_queue = false;
1897 unsigned manager_dispatch_dbus_queue(Manager *m) {
1904 if (m->dispatching_dbus_queue)
1907 m->dispatching_dbus_queue = true;
1909 while ((meta = m->dbus_unit_queue)) {
1910 assert(meta->in_dbus_queue);
1912 bus_unit_send_change_signal((Unit*) meta);
1916 while ((j = m->dbus_job_queue)) {
1917 assert(j->in_dbus_queue);
1919 bus_job_send_change_signal(j);
1923 m->dispatching_dbus_queue = false;
1927 static int manager_process_notify_fd(Manager *m) {
1934 struct msghdr msghdr;
1936 struct ucred *ucred;
1938 struct cmsghdr cmsghdr;
1939 uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
1945 iovec.iov_base = buf;
1946 iovec.iov_len = sizeof(buf)-1;
1950 msghdr.msg_iov = &iovec;
1951 msghdr.msg_iovlen = 1;
1952 msghdr.msg_control = &control;
1953 msghdr.msg_controllen = sizeof(control);
1955 if ((n = recvmsg(m->notify_watch.fd, &msghdr, MSG_DONTWAIT)) <= 0) {
1959 if (errno == EAGAIN || errno == EINTR)
1965 if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) ||
1966 control.cmsghdr.cmsg_level != SOL_SOCKET ||
1967 control.cmsghdr.cmsg_type != SCM_CREDENTIALS ||
1968 control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) {
1969 log_warning("Received notify message without credentials. Ignoring.");
1973 ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);
1975 if (!(u = hashmap_get(m->watch_pids, LONG_TO_PTR(ucred->pid))))
1976 if (!(u = cgroup_unit_by_pid(m, ucred->pid))) {
1977 log_warning("Cannot find unit for notify message of PID %lu.", (unsigned long) ucred->pid);
1981 assert((size_t) n < sizeof(buf));
1983 if (!(tags = strv_split(buf, "\n\r")))
1986 log_debug("Got notification message for unit %s", u->meta.id);
1988 if (UNIT_VTABLE(u)->notify_message)
1989 UNIT_VTABLE(u)->notify_message(u, ucred->pid, tags);
1997 static int manager_dispatch_sigchld(Manager *m) {
2007 /* First we call waitd() for a PID and do not reap the
2008 * zombie. That way we can still access /proc/$PID for
2009 * it while it is a zombie. */
2010 if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) {
2012 if (errno == ECHILD)
2024 if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) {
2027 get_process_name(si.si_pid, &name);
2028 log_debug("Got SIGCHLD for process %lu (%s)", (unsigned long) si.si_pid, strna(name));
2032 /* Let's flush any message the dying child might still
2033 * have queued for us. This ensures that the process
2034 * still exists in /proc so that we can figure out
2035 * which cgroup and hence unit it belongs to. */
2036 if ((r = manager_process_notify_fd(m)) < 0)
2039 /* And now figure out the unit this belongs to */
2040 if (!(u = hashmap_get(m->watch_pids, LONG_TO_PTR(si.si_pid))))
2041 u = cgroup_unit_by_pid(m, si.si_pid);
2043 /* And now, we actually reap the zombie. */
2044 if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {
2051 if (si.si_code != CLD_EXITED && si.si_code != CLD_KILLED && si.si_code != CLD_DUMPED)
2054 log_debug("Child %lu died (code=%s, status=%i/%s)",
2055 (long unsigned) si.si_pid,
2056 sigchld_code_to_string(si.si_code),
2058 strna(si.si_code == CLD_EXITED
2059 ? exit_status_to_string(si.si_status, EXIT_STATUS_FULL)
2060 : signal_to_string(si.si_status)));
2065 log_debug("Child %lu belongs to %s", (long unsigned) si.si_pid, u->meta.id);
2067 hashmap_remove(m->watch_pids, LONG_TO_PTR(si.si_pid));
2068 UNIT_VTABLE(u)->sigchld_event(u, si.si_pid, si.si_code, si.si_status);
2074 static int manager_start_target(Manager *m, const char *name, JobMode mode) {
2078 dbus_error_init(&error);
2080 log_debug("Activating special unit %s", name);
2082 if ((r = manager_add_job_by_name(m, JOB_START, name, mode, true, &error, NULL)) < 0)
2083 log_error("Failed to enqueue %s job: %s", name, bus_error(&error, r));
2085 dbus_error_free(&error);
2090 static int manager_process_signal_fd(Manager *m) {
2092 struct signalfd_siginfo sfsi;
2093 bool sigchld = false;
2098 if ((n = read(m->signal_watch.fd, &sfsi, sizeof(sfsi))) != sizeof(sfsi)) {
2103 if (errno == EINTR || errno == EAGAIN)
2109 if (sfsi.ssi_pid > 0) {
2112 get_process_name(sfsi.ssi_pid, &p);
2114 log_debug("Received SIG%s from PID %lu (%s).",
2115 signal_to_string(sfsi.ssi_signo),
2116 (unsigned long) sfsi.ssi_pid, strna(p));
2119 log_debug("Received SIG%s.", signal_to_string(sfsi.ssi_signo));
2121 switch (sfsi.ssi_signo) {
2128 if (m->running_as == MANAGER_SYSTEM) {
2129 /* This is for compatibility with the
2130 * original sysvinit */
2131 m->exit_code = MANAGER_REEXECUTE;
2138 if (m->running_as == MANAGER_SYSTEM) {
2139 manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE);
2143 /* Run the exit target if there is one, if not, just exit. */
2144 if (manager_start_target(m, SPECIAL_EXIT_TARGET, JOB_REPLACE) < 0) {
2145 m->exit_code = MANAGER_EXIT;
2152 if (m->running_as == MANAGER_SYSTEM)
2153 manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE);
2155 /* This is a nop on non-init */
2159 if (m->running_as == MANAGER_SYSTEM)
2160 manager_start_target(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE);
2162 /* This is a nop on non-init */
2168 u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);
2170 if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) {
2171 log_info("Trying to reconnect to bus...");
2175 if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) {
2176 log_info("Loading D-Bus service...");
2177 manager_start_target(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE);
2188 if (!(f = open_memstream(&dump, &size))) {
2189 log_warning("Failed to allocate memory stream.");
2193 manager_dump_units(m, f, "\t");
2194 manager_dump_jobs(m, f, "\t");
2199 log_warning("Failed to write status stream");
2204 log_dump(LOG_INFO, dump);
2211 m->exit_code = MANAGER_RELOAD;
2216 /* Starting SIGRTMIN+0 */
2217 static const char * const target_table[] = {
2218 [0] = SPECIAL_DEFAULT_TARGET,
2219 [1] = SPECIAL_RESCUE_TARGET,
2220 [2] = SPECIAL_EMERGENCY_TARGET,
2221 [3] = SPECIAL_HALT_TARGET,
2222 [4] = SPECIAL_POWEROFF_TARGET,
2223 [5] = SPECIAL_REBOOT_TARGET,
2224 [6] = SPECIAL_KEXEC_TARGET
2227 /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
2228 static const ManagerExitCode code_table[] = {
2230 [1] = MANAGER_POWEROFF,
2231 [2] = MANAGER_REBOOT,
2235 if ((int) sfsi.ssi_signo >= SIGRTMIN+0 &&
2236 (int) sfsi.ssi_signo < SIGRTMIN+(int) ELEMENTSOF(target_table)) {
2237 int idx = (int) sfsi.ssi_signo - SIGRTMIN;
2238 manager_start_target(m, target_table[idx],
2239 (idx == 1 || idx == 2) ? JOB_ISOLATE : JOB_REPLACE);
2243 if ((int) sfsi.ssi_signo >= SIGRTMIN+13 &&
2244 (int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(code_table)) {
2245 m->exit_code = code_table[sfsi.ssi_signo - SIGRTMIN - 13];
2249 switch (sfsi.ssi_signo - SIGRTMIN) {
2252 log_debug("Enabling showing of status.");
2253 manager_set_show_status(m, true);
2257 log_debug("Disabling showing of status.");
2258 manager_set_show_status(m, false);
2262 log_set_max_level(LOG_DEBUG);
2263 log_notice("Setting log level to debug.");
2267 log_set_max_level(LOG_INFO);
2268 log_notice("Setting log level to info.");
2272 log_set_target(LOG_TARGET_CONSOLE);
2273 log_notice("Setting log target to console.");
2277 log_set_target(LOG_TARGET_KMSG);
2278 log_notice("Setting log target to kmsg.");
2282 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
2283 log_notice("Setting log target to syslog-or-kmsg.");
2287 log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo));
2294 return manager_dispatch_sigchld(m);
2299 static int process_event(Manager *m, struct epoll_event *ev) {
2306 assert_se(w = ev->data.ptr);
2308 if (w->type == WATCH_INVALID)
2315 /* An incoming signal? */
2316 if (ev->events != EPOLLIN)
2319 if ((r = manager_process_signal_fd(m)) < 0)
2326 /* An incoming daemon notification event? */
2327 if (ev->events != EPOLLIN)
2330 if ((r = manager_process_notify_fd(m)) < 0)
2337 /* Some fd event, to be dispatched to the units */
2338 UNIT_VTABLE(w->data.unit)->fd_event(w->data.unit, w->fd, ev->events, w);
2341 case WATCH_UNIT_TIMER:
2342 case WATCH_JOB_TIMER: {
2346 /* Some timer event, to be dispatched to the units */
2347 if ((k = read(w->fd, &v, sizeof(v))) != sizeof(v)) {
2349 if (k < 0 && (errno == EINTR || errno == EAGAIN))
2352 return k < 0 ? -errno : -EIO;
2355 if (w->type == WATCH_UNIT_TIMER)
2356 UNIT_VTABLE(w->data.unit)->timer_event(w->data.unit, v, w);
2358 job_timer_event(w->data.job, v, w);
2363 /* Some mount table change, intended for the mount subsystem */
2364 mount_fd_event(m, ev->events);
2368 /* Some swap table change, intended for the swap subsystem */
2369 swap_fd_event(m, ev->events);
2373 /* Some notification from udev, intended for the device subsystem */
2374 device_fd_event(m, ev->events);
2377 case WATCH_DBUS_WATCH:
2378 bus_watch_event(m, w, ev->events);
2381 case WATCH_DBUS_TIMEOUT:
2382 bus_timeout_event(m, w, ev->events);
2386 log_error("event type=%i", w->type);
2387 assert_not_reached("Unknown epoll event type.");
2393 int manager_loop(Manager *m) {
2396 RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000);
2399 m->exit_code = MANAGER_RUNNING;
2401 /* Release the path cache */
2402 set_free_free(m->unit_path_cache);
2403 m->unit_path_cache = NULL;
2405 manager_check_finished(m);
2407 /* There might still be some zombies hanging around from
2408 * before we were exec()'ed. Leat's reap them */
2409 if ((r = manager_dispatch_sigchld(m)) < 0)
2412 while (m->exit_code == MANAGER_RUNNING) {
2413 struct epoll_event event;
2416 if (!ratelimit_test(&rl)) {
2417 /* Yay, something is going seriously wrong, pause a little */
2418 log_warning("Looping too fast. Throttling execution a little.");
2422 if (manager_dispatch_load_queue(m) > 0)
2425 if (manager_dispatch_run_queue(m) > 0)
2428 if (bus_dispatch(m) > 0)
2431 if (manager_dispatch_cleanup_queue(m) > 0)
2434 if (manager_dispatch_gc_queue(m) > 0)
2437 if (manager_dispatch_dbus_queue(m) > 0)
2440 if (swap_dispatch_reload(m) > 0)
2443 if ((n = epoll_wait(m->epoll_fd, &event, 1, -1)) < 0) {
2453 if ((r = process_event(m, &event)) < 0)
2457 return m->exit_code;
2460 int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u) {
2468 if (!startswith(s, "/org/freedesktop/systemd1/unit/"))
2471 if (!(n = bus_path_unescape(s+31)))
2474 u = manager_get_unit(m, n);
2485 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) {
2494 if (!startswith(s, "/org/freedesktop/systemd1/job/"))
2497 if ((r = safe_atou(s + 30, &id)) < 0)
2500 if (!(j = manager_get_job(m, id)))
2508 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success) {
2513 if (m->audit_fd < 0)
2516 /* Don't generate audit events if the service was already
2517 * started and we're just deserializing */
2518 if (m->n_reloading > 0)
2521 if (m->running_as != MANAGER_SYSTEM)
2524 if (u->meta.type != UNIT_SERVICE)
2527 if (!(p = unit_name_to_prefix_and_instance(u->meta.id))) {
2528 log_error("Failed to allocate unit name for audit message: %s", strerror(ENOMEM));
2532 if (audit_log_user_comm_message(m->audit_fd, type, "", p, NULL, NULL, NULL, success) < 0) {
2533 log_warning("Failed to send audit message: %m");
2535 if (errno == EPERM) {
2536 /* We aren't allowed to send audit messages?
2537 * Then let's not retry again, to avoid
2538 * spamming the user with the same and same
2539 * messages over and over. */
2541 audit_close(m->audit_fd);
2551 void manager_send_unit_plymouth(Manager *m, Unit *u) {
2553 union sockaddr_union sa;
2555 char *message = NULL;
2557 /* Don't generate plymouth events if the service was already
2558 * started and we're just deserializing */
2559 if (m->n_reloading > 0)
2562 if (m->running_as != MANAGER_SYSTEM)
2565 if (u->meta.type != UNIT_SERVICE &&
2566 u->meta.type != UNIT_MOUNT &&
2567 u->meta.type != UNIT_SWAP)
2570 /* We set SOCK_NONBLOCK here so that we rather drop the
2571 * message then wait for plymouth */
2572 if ((fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
2573 log_error("socket() failed: %m");
2578 sa.sa.sa_family = AF_UNIX;
2579 strncpy(sa.un.sun_path+1, "/org/freedesktop/plymouthd", sizeof(sa.un.sun_path)-1);
2580 if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {
2582 if (errno != EPIPE &&
2585 errno != ECONNREFUSED &&
2586 errno != ECONNRESET &&
2587 errno != ECONNABORTED)
2588 log_error("connect() failed: %m");
2593 if (asprintf(&message, "U\002%c%s%n", (int) (strlen(u->meta.id) + 1), u->meta.id, &n) < 0) {
2594 log_error("Out of memory");
2599 if (write(fd, message, n + 1) != n + 1) {
2601 if (errno != EPIPE &&
2604 errno != ECONNREFUSED &&
2605 errno != ECONNRESET &&
2606 errno != ECONNABORTED)
2607 log_error("Failed to write Plymouth message: %m");
2614 close_nointr_nofail(fd);
2619 void manager_dispatch_bus_name_owner_changed(
2622 const char* old_owner,
2623 const char *new_owner) {
2630 if (!(u = hashmap_get(m->watch_bus, name)))
2633 UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner);
2636 void manager_dispatch_bus_query_pid_done(
2647 if (!(u = hashmap_get(m->watch_bus, name)))
2650 UNIT_VTABLE(u)->bus_query_pid_done(u, name, pid);
2653 int manager_open_serialization(Manager *m, FILE **_f) {
2661 if (m->running_as == MANAGER_SYSTEM)
2662 asprintf(&path, "/run/systemd/dump-%lu-XXXXXX", (unsigned long) getpid());
2664 asprintf(&path, "/tmp/systemd-dump-%lu-XXXXXX", (unsigned long) getpid());
2669 saved_umask = umask(0077);
2670 fd = mkostemp(path, O_RDWR|O_CLOEXEC);
2680 log_debug("Serializing state to %s", path);
2683 if (!(f = fdopen(fd, "w+")))
2691 int manager_serialize(Manager *m, FILE *f, FDSet *fds) {
2703 fprintf(f, "current-job-id=%i\n", m->current_job_id);
2704 fprintf(f, "taint-usr=%s\n", yes_no(m->taint_usr));
2706 dual_timestamp_serialize(f, "initrd-timestamp", &m->initrd_timestamp);
2707 dual_timestamp_serialize(f, "startup-timestamp", &m->startup_timestamp);
2708 dual_timestamp_serialize(f, "finish-timestamp", &m->finish_timestamp);
2712 HASHMAP_FOREACH_KEY(u, t, m->units, i) {
2713 if (u->meta.id != t)
2716 if (!unit_can_serialize(u))
2720 fputs(u->meta.id, f);
2723 if ((r = unit_serialize(u, f, fds)) < 0) {
2729 assert(m->n_reloading > 0);
2735 r = bus_fdset_add_all(m, fds);
2742 int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
2748 log_debug("Deserializing state...");
2753 char line[LINE_MAX], *l;
2755 if (!fgets(line, sizeof(line), f)) {
2770 if (startswith(l, "current-job-id=")) {
2773 if (safe_atou32(l+15, &id) < 0)
2774 log_debug("Failed to parse current job id value %s", l+15);
2776 m->current_job_id = MAX(m->current_job_id, id);
2777 } else if (startswith(l, "taint-usr=")) {
2780 if ((b = parse_boolean(l+10)) < 0)
2781 log_debug("Failed to parse taint /usr flag %s", l+10);
2783 m->taint_usr = m->taint_usr || b;
2784 } else if (startswith(l, "initrd-timestamp="))
2785 dual_timestamp_deserialize(l+17, &m->initrd_timestamp);
2786 else if (startswith(l, "startup-timestamp="))
2787 dual_timestamp_deserialize(l+18, &m->startup_timestamp);
2788 else if (startswith(l, "finish-timestamp="))
2789 dual_timestamp_deserialize(l+17, &m->finish_timestamp);
2791 log_debug("Unknown serialization item '%s'", l);
2796 char name[UNIT_NAME_MAX+2];
2799 if (!fgets(name, sizeof(name), f)) {
2810 if ((r = manager_load_unit(m, strstrip(name), NULL, NULL, &u)) < 0)
2813 if ((r = unit_deserialize(u, f, fds)) < 0)
2823 assert(m->n_reloading > 0);
2829 int manager_reload(Manager *m) {
2836 if ((r = manager_open_serialization(m, &f)) < 0)
2841 if (!(fds = fdset_new())) {
2847 if ((r = manager_serialize(m, f, fds)) < 0) {
2852 if (fseeko(f, 0, SEEK_SET) < 0) {
2858 /* From here on there is no way back. */
2859 manager_clear_jobs_and_units(m);
2860 manager_undo_generators(m);
2862 /* Find new unit paths */
2863 lookup_paths_free(&m->lookup_paths);
2864 if ((q = lookup_paths_init(&m->lookup_paths, m->running_as, true)) < 0)
2867 manager_run_generators(m);
2869 manager_build_unit_path_cache(m);
2871 /* First, enumerate what we can from all config files */
2872 if ((q = manager_enumerate(m)) < 0)
2875 /* Second, deserialize our stored data */
2876 if ((q = manager_deserialize(m, f, fds)) < 0)
2882 /* Third, fire things up! */
2883 if ((q = manager_coldplug(m)) < 0)
2886 assert(m->n_reloading > 0);
2899 bool manager_is_booting_or_shutting_down(Manager *m) {
2904 /* Is the initial job still around? */
2905 if (manager_get_job(m, 1))
2908 /* Is there a job for the shutdown target? */
2909 u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
2911 return !!u->meta.job;
2916 void manager_reset_failed(Manager *m) {
2922 HASHMAP_FOREACH(u, m->units, i)
2923 unit_reset_failed(u);
2926 bool manager_unit_pending_inactive(Manager *m, const char *name) {
2932 /* Returns true if the unit is inactive or going down */
2933 if (!(u = manager_get_unit(m, name)))
2936 return unit_pending_inactive(u);
2939 void manager_check_finished(Manager *m) {
2940 char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX];
2941 usec_t kernel_usec = 0, initrd_usec = 0, userspace_usec = 0, total_usec = 0;
2945 if (dual_timestamp_is_set(&m->finish_timestamp))
2948 if (hashmap_size(m->jobs) > 0)
2951 dual_timestamp_get(&m->finish_timestamp);
2953 if (m->running_as == MANAGER_SYSTEM && detect_container(NULL) <= 0) {
2955 userspace_usec = m->finish_timestamp.monotonic - m->startup_timestamp.monotonic;
2956 total_usec = m->finish_timestamp.monotonic;
2958 if (dual_timestamp_is_set(&m->initrd_timestamp)) {
2960 kernel_usec = m->initrd_timestamp.monotonic;
2961 initrd_usec = m->startup_timestamp.monotonic - m->initrd_timestamp.monotonic;
2963 log_info("Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.",
2964 format_timespan(kernel, sizeof(kernel), kernel_usec),
2965 format_timespan(initrd, sizeof(initrd), initrd_usec),
2966 format_timespan(userspace, sizeof(userspace), userspace_usec),
2967 format_timespan(sum, sizeof(sum), total_usec));
2969 kernel_usec = m->startup_timestamp.monotonic;
2972 log_info("Startup finished in %s (kernel) + %s (userspace) = %s.",
2973 format_timespan(kernel, sizeof(kernel), kernel_usec),
2974 format_timespan(userspace, sizeof(userspace), userspace_usec),
2975 format_timespan(sum, sizeof(sum), total_usec));
2978 userspace_usec = initrd_usec = kernel_usec = 0;
2979 total_usec = m->finish_timestamp.monotonic - m->startup_timestamp.monotonic;
2981 log_debug("Startup finished in %s.",
2982 format_timespan(sum, sizeof(sum), total_usec));
2985 bus_broadcast_finished(m, kernel_usec, initrd_usec, userspace_usec, total_usec);
2988 "READY=1\nSTATUS=Startup finished in %s.",
2989 format_timespan(sum, sizeof(sum), total_usec));
2992 void manager_run_generators(Manager *m) {
2994 const char *generator_path;
2995 const char *argv[3];
3000 generator_path = m->running_as == MANAGER_SYSTEM ? SYSTEM_GENERATOR_PATH : USER_GENERATOR_PATH;
3001 if (!(d = opendir(generator_path))) {
3003 if (errno == ENOENT)
3006 log_error("Failed to enumerate generator directory: %m");
3010 if (!m->generator_unit_path) {
3012 char user_path[] = "/tmp/systemd-generator-XXXXXX";
3014 if (m->running_as == MANAGER_SYSTEM && getpid() == 1) {
3015 p = "/run/systemd/generator";
3017 if (mkdir_p(p, 0755) < 0) {
3018 log_error("Failed to create generator directory: %m");
3023 if (!(p = mkdtemp(user_path))) {
3024 log_error("Failed to create generator directory: %m");
3029 if (!(m->generator_unit_path = strdup(p))) {
3030 log_error("Failed to allocate generator unit path.");
3035 argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */
3036 argv[1] = m->generator_unit_path;
3040 execute_directory(generator_path, d, (char**) argv);
3043 if (rmdir(m->generator_unit_path) >= 0) {
3044 /* Uh? we were able to remove this dir? I guess that
3045 * means the directory was empty, hence let's shortcut
3048 free(m->generator_unit_path);
3049 m->generator_unit_path = NULL;
3053 if (!strv_find(m->lookup_paths.unit_path, m->generator_unit_path)) {
3056 if (!(l = strv_append(m->lookup_paths.unit_path, m->generator_unit_path))) {
3057 log_error("Failed to add generator directory to unit search path: %m");
3061 strv_free(m->lookup_paths.unit_path);
3062 m->lookup_paths.unit_path = l;
3064 log_debug("Added generator unit path %s to search path.", m->generator_unit_path);
3072 void manager_undo_generators(Manager *m) {
3075 if (!m->generator_unit_path)
3078 strv_remove(m->lookup_paths.unit_path, m->generator_unit_path);
3079 rm_rf(m->generator_unit_path, false, true, false);
3081 free(m->generator_unit_path);
3082 m->generator_unit_path = NULL;
3085 int manager_set_default_controllers(Manager *m, char **controllers) {
3090 if (!(l = strv_copy(controllers)))
3093 strv_free(m->default_controllers);
3094 m->default_controllers = l;
3099 void manager_recheck_syslog(Manager *m) {
3104 if (m->running_as != MANAGER_SYSTEM)
3107 if ((u = manager_get_unit(m, SPECIAL_SYSLOG_SOCKET))) {
3110 state = SOCKET(u)->state;
3112 if (state != SOCKET_DEAD &&
3113 state != SOCKET_FAILED &&
3114 state != SOCKET_RUNNING) {
3116 /* Hmm, the socket is not set up, or is still
3117 * listening, let's better not try to use
3118 * it. Note that we have no problem if the
3119 * socket is completely down, since there
3120 * might be a foreign /dev/log socket around
3121 * and we want to make use of that.
3129 if ((u = manager_get_unit(m, SPECIAL_SYSLOG_TARGET)))
3130 if (TARGET(u)->state != TARGET_ACTIVE) {
3135 /* Hmm, OK, so the socket is either fully up, or fully down,
3136 * and the target is up, then let's make use of the socket */
3140 void manager_set_show_status(Manager *m, bool b) {
3143 if (m->running_as != MANAGER_SYSTEM)
3149 touch("/run/systemd/show-status");
3151 unlink("/run/systemd/show-status");
3154 bool manager_get_show_status(Manager *m) {
3157 if (m->running_as != MANAGER_SYSTEM)
3163 /* If Plymouth is running make sure we show the status, so
3164 * that there's something nice to see when people press Esc */
3166 return plymouth_running();
3169 static const char* const manager_running_as_table[_MANAGER_RUNNING_AS_MAX] = {
3170 [MANAGER_SYSTEM] = "system",
3171 [MANAGER_USER] = "user"
3174 DEFINE_STRING_TABLE_LOOKUP(manager_running_as, ManagerRunningAs);