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>
44 #include <systemd/sd-daemon.h>
52 #include "ratelimit.h"
54 #include "mount-setup.h"
55 #include "unit-name.h"
56 #include "dbus-unit.h"
59 #include "path-lookup.h"
61 #include "bus-errors.h"
62 #include "exit-status.h"
66 /* As soon as 16 units are in our GC queue, make sure to run a gc sweep */
67 #define GC_QUEUE_ENTRIES_MAX 16
69 /* As soon as 5s passed since a unit was added to our GC queue, make sure to run a gc sweep */
70 #define GC_QUEUE_USEC_MAX (10*USEC_PER_SEC)
72 /* Where clients shall send notification messages to */
73 #define NOTIFY_SOCKET_SYSTEM "/run/systemd/notify"
74 #define NOTIFY_SOCKET_USER "@/org/freedesktop/systemd1/notify"
76 static int manager_setup_notify(Manager *m) {
79 struct sockaddr_un un;
81 struct epoll_event ev;
87 m->notify_watch.type = WATCH_NOTIFY;
88 if ((m->notify_watch.fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
89 log_error("Failed to allocate notification socket: %m");
94 sa.sa.sa_family = AF_UNIX;
97 snprintf(sa.un.sun_path, sizeof(sa.un.sun_path), NOTIFY_SOCKET_USER "/%llu", random_ull());
99 unlink(NOTIFY_SOCKET_SYSTEM);
100 strncpy(sa.un.sun_path, NOTIFY_SOCKET_SYSTEM, sizeof(sa.un.sun_path));
103 if (sa.un.sun_path[0] == '@')
104 sa.un.sun_path[0] = 0;
107 r = bind(m->notify_watch.fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1));
111 log_error("bind() failed: %m");
115 if (setsockopt(m->notify_watch.fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) {
116 log_error("SO_PASSCRED failed: %m");
122 ev.data.ptr = &m->notify_watch;
124 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->notify_watch.fd, &ev) < 0)
127 if (sa.un.sun_path[0] == 0)
128 sa.un.sun_path[0] = '@';
130 if (!(m->notify_socket = strdup(sa.un.sun_path)))
133 log_debug("Using notification socket %s", m->notify_socket);
138 static int enable_special_signals(Manager *m) {
143 /* Enable that we get SIGINT on control-alt-del */
144 if (reboot(RB_DISABLE_CAD) < 0)
145 log_warning("Failed to enable ctrl-alt-del handling: %m");
147 if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
148 log_warning("Failed to open /dev/tty0: %m");
150 /* Enable that we get SIGWINCH on kbrequest */
151 if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
152 log_warning("Failed to enable kbrequest handling: %s", strerror(errno));
154 close_nointr_nofail(fd);
160 static int manager_setup_signals(Manager *m) {
162 struct epoll_event ev;
167 /* We are not interested in SIGSTOP and friends. */
169 sa.sa_handler = SIG_DFL;
170 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
171 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
173 assert_se(sigemptyset(&mask) == 0);
175 sigset_add_many(&mask,
176 SIGCHLD, /* Child died */
177 SIGTERM, /* Reexecute daemon */
178 SIGHUP, /* Reload configuration */
179 SIGUSR1, /* systemd/upstart: reconnect to D-Bus */
180 SIGUSR2, /* systemd: dump status */
181 SIGINT, /* Kernel sends us this on control-alt-del */
182 SIGWINCH, /* Kernel sends us this on kbrequest (alt-arrowup) */
183 SIGPWR, /* Some kernel drivers and upsd send us this on power failure */
184 SIGRTMIN+0, /* systemd: start default.target */
185 SIGRTMIN+1, /* systemd: isolate rescue.target */
186 SIGRTMIN+2, /* systemd: isolate emergency.target */
187 SIGRTMIN+3, /* systemd: start halt.target */
188 SIGRTMIN+4, /* systemd: start poweroff.target */
189 SIGRTMIN+5, /* systemd: start reboot.target */
190 SIGRTMIN+6, /* systemd: start kexec.target */
191 SIGRTMIN+13, /* systemd: Immediate halt */
192 SIGRTMIN+14, /* systemd: Immediate poweroff */
193 SIGRTMIN+15, /* systemd: Immediate reboot */
194 SIGRTMIN+16, /* systemd: Immediate kexec */
195 SIGRTMIN+20, /* systemd: enable status messages */
196 SIGRTMIN+21, /* systemd: disable status messages */
197 SIGRTMIN+22, /* systemd: set log level to LOG_DEBUG */
198 SIGRTMIN+23, /* systemd: set log level to LOG_INFO */
199 SIGRTMIN+26, /* systemd: set log target to journal-or-kmsg */
200 SIGRTMIN+27, /* systemd: set log target to console */
201 SIGRTMIN+28, /* systemd: set log target to kmsg */
202 SIGRTMIN+29, /* systemd: set log target to syslog-or-kmsg */
204 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
206 m->signal_watch.type = WATCH_SIGNAL;
207 if ((m->signal_watch.fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC)) < 0)
212 ev.data.ptr = &m->signal_watch;
214 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->signal_watch.fd, &ev) < 0)
217 if (m->running_as == MANAGER_SYSTEM)
218 return enable_special_signals(m);
223 int manager_new(ManagerRunningAs running_as, Manager **_m) {
228 assert(running_as >= 0);
229 assert(running_as < _MANAGER_RUNNING_AS_MAX);
231 if (!(m = new0(Manager, 1)))
234 dual_timestamp_get(&m->startup_timestamp);
236 m->running_as = running_as;
237 m->name_data_slot = m->conn_data_slot = m->subscribed_data_slot = -1;
238 m->exit_code = _MANAGER_EXIT_CODE_INVALID;
239 m->pin_cgroupfs_fd = -1;
245 m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = m->dev_autofs_fd = m->swap_watch.fd = -1;
246 m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
248 if (!(m->environment = strv_copy(environ)))
251 if (running_as == MANAGER_SYSTEM) {
252 m->default_controllers = strv_new("cpu", NULL);
253 if (!m->default_controllers)
257 if (!(m->units = hashmap_new(string_hash_func, string_compare_func)))
260 if (!(m->jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))
263 if (!(m->transaction_jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))
266 if (!(m->watch_pids = hashmap_new(trivial_hash_func, trivial_compare_func)))
269 if (!(m->cgroup_bondings = hashmap_new(string_hash_func, string_compare_func)))
272 if (!(m->watch_bus = hashmap_new(string_hash_func, string_compare_func)))
275 if ((m->epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0)
278 if ((r = lookup_paths_init(&m->lookup_paths, m->running_as, true)) < 0)
281 if ((r = manager_setup_signals(m)) < 0)
284 if ((r = manager_setup_cgroup(m)) < 0)
287 if ((r = manager_setup_notify(m)) < 0)
290 /* Try to connect to the busses, if possible. */
291 if ((r = bus_init(m, running_as != MANAGER_SYSTEM)) < 0)
295 if ((m->audit_fd = audit_open()) < 0 &&
296 /* If the kernel lacks netlink or audit support,
297 * don't worry about it. */
298 errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT)
299 log_error("Failed to connect to audit log: %m");
302 m->taint_usr = dir_is_empty("/usr") > 0;
312 static unsigned manager_dispatch_cleanup_queue(Manager *m) {
318 while ((u = m->cleanup_queue)) {
319 assert(u->in_cleanup_queue);
329 GC_OFFSET_IN_PATH, /* This one is on the path we were traveling */
330 GC_OFFSET_UNSURE, /* No clue */
331 GC_OFFSET_GOOD, /* We still need this unit */
332 GC_OFFSET_BAD, /* We don't need this unit anymore */
336 static void unit_gc_sweep(Unit *u, unsigned gc_marker) {
343 if (u->gc_marker == gc_marker + GC_OFFSET_GOOD ||
344 u->gc_marker == gc_marker + GC_OFFSET_BAD ||
345 u->gc_marker == gc_marker + GC_OFFSET_IN_PATH)
348 if (u->in_cleanup_queue)
351 if (unit_check_gc(u))
354 u->gc_marker = gc_marker + GC_OFFSET_IN_PATH;
358 SET_FOREACH(other, u->dependencies[UNIT_REFERENCED_BY], i) {
359 unit_gc_sweep(other, gc_marker);
361 if (other->gc_marker == gc_marker + GC_OFFSET_GOOD)
364 if (other->gc_marker != gc_marker + GC_OFFSET_BAD)
371 /* We were unable to find anything out about this entry, so
372 * let's investigate it later */
373 u->gc_marker = gc_marker + GC_OFFSET_UNSURE;
374 unit_add_to_gc_queue(u);
378 /* We definitely know that this one is not useful anymore, so
379 * let's mark it for deletion */
380 u->gc_marker = gc_marker + GC_OFFSET_BAD;
381 unit_add_to_cleanup_queue(u);
385 u->gc_marker = gc_marker + GC_OFFSET_GOOD;
388 static unsigned manager_dispatch_gc_queue(Manager *m) {
395 if ((m->n_in_gc_queue < GC_QUEUE_ENTRIES_MAX) &&
396 (m->gc_queue_timestamp <= 0 ||
397 (m->gc_queue_timestamp + GC_QUEUE_USEC_MAX) > now(CLOCK_MONOTONIC)))
400 log_debug("Running GC...");
402 m->gc_marker += _GC_OFFSET_MAX;
403 if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX)
406 gc_marker = m->gc_marker;
408 while ((u = m->gc_queue)) {
409 assert(u->in_gc_queue);
411 unit_gc_sweep(u, gc_marker);
413 LIST_REMOVE(Unit, gc_queue, m->gc_queue, u);
414 u->in_gc_queue = false;
418 if (u->gc_marker == gc_marker + GC_OFFSET_BAD ||
419 u->gc_marker == gc_marker + GC_OFFSET_UNSURE) {
420 log_debug("Collecting %s", u->id);
421 u->gc_marker = gc_marker + GC_OFFSET_BAD;
422 unit_add_to_cleanup_queue(u);
426 m->n_in_gc_queue = 0;
427 m->gc_queue_timestamp = 0;
432 static void manager_clear_jobs_and_units(Manager *m) {
438 while ((j = hashmap_first(m->transaction_jobs)))
441 while ((u = hashmap_first(m->units)))
444 manager_dispatch_cleanup_queue(m);
446 assert(!m->load_queue);
447 assert(!m->run_queue);
448 assert(!m->dbus_unit_queue);
449 assert(!m->dbus_job_queue);
450 assert(!m->cleanup_queue);
451 assert(!m->gc_queue);
453 assert(hashmap_isempty(m->transaction_jobs));
454 assert(hashmap_isempty(m->jobs));
455 assert(hashmap_isempty(m->units));
458 void manager_free(Manager *m) {
463 manager_clear_jobs_and_units(m);
465 for (c = 0; c < _UNIT_TYPE_MAX; c++)
466 if (unit_vtable[c]->shutdown)
467 unit_vtable[c]->shutdown(m);
469 /* If we reexecute ourselves, we keep the root cgroup
471 manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE);
473 manager_undo_generators(m);
477 hashmap_free(m->units);
478 hashmap_free(m->jobs);
479 hashmap_free(m->transaction_jobs);
480 hashmap_free(m->watch_pids);
481 hashmap_free(m->watch_bus);
483 if (m->epoll_fd >= 0)
484 close_nointr_nofail(m->epoll_fd);
485 if (m->signal_watch.fd >= 0)
486 close_nointr_nofail(m->signal_watch.fd);
487 if (m->notify_watch.fd >= 0)
488 close_nointr_nofail(m->notify_watch.fd);
491 if (m->audit_fd >= 0)
492 audit_close(m->audit_fd);
495 free(m->notify_socket);
497 lookup_paths_free(&m->lookup_paths);
498 strv_free(m->environment);
500 strv_free(m->default_controllers);
502 hashmap_free(m->cgroup_bondings);
503 set_free_free(m->unit_path_cache);
508 int manager_enumerate(Manager *m) {
514 /* Let's ask every type to load all units from disk/kernel
515 * that it might know */
516 for (c = 0; c < _UNIT_TYPE_MAX; c++)
517 if (unit_vtable[c]->enumerate)
518 if ((q = unit_vtable[c]->enumerate(m)) < 0)
521 manager_dispatch_load_queue(m);
525 int manager_coldplug(Manager *m) {
533 /* Then, let's set up their initial state. */
534 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
540 if ((q = unit_coldplug(u)) < 0)
547 static void manager_build_unit_path_cache(Manager *m) {
554 set_free_free(m->unit_path_cache);
556 if (!(m->unit_path_cache = set_new(string_hash_func, string_compare_func))) {
557 log_error("Failed to allocate unit path cache.");
561 /* This simply builds a list of files we know exist, so that
562 * we don't always have to go to disk */
564 STRV_FOREACH(i, m->lookup_paths.unit_path) {
567 if (!(d = opendir(*i))) {
568 log_error("Failed to open directory: %m");
572 while ((de = readdir(d))) {
575 if (ignore_file(de->d_name))
578 p = join(streq(*i, "/") ? "" : *i, "/", de->d_name, NULL);
584 if ((r = set_put(m->unit_path_cache, p)) < 0) {
597 log_error("Failed to build unit path cache: %s", strerror(-r));
599 set_free_free(m->unit_path_cache);
600 m->unit_path_cache = NULL;
606 int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {
611 manager_run_generators(m);
613 manager_build_unit_path_cache(m);
615 /* If we will deserialize make sure that during enumeration
616 * this is already known, so we increase the counter here
621 /* First, enumerate what we can from all config files */
622 r = manager_enumerate(m);
624 /* Second, deserialize if there is something to deserialize */
626 if ((q = manager_deserialize(m, serialization, fds)) < 0)
629 /* Third, fire things up! */
630 if ((q = manager_coldplug(m)) < 0)
634 assert(m->n_reloading > 0);
641 static void transaction_delete_job(Manager *m, Job *j, bool delete_dependencies) {
645 /* Deletes one job from the transaction */
647 manager_transaction_unlink_job(m, j, delete_dependencies);
653 static void transaction_delete_unit(Manager *m, Unit *u) {
656 /* Deletes all jobs associated with a certain unit from the
659 while ((j = hashmap_get(m->transaction_jobs, u)))
660 transaction_delete_job(m, j, true);
663 static void transaction_clean_dependencies(Manager *m) {
669 /* Drops all dependencies of all installed jobs */
671 HASHMAP_FOREACH(j, m->jobs, i) {
672 while (j->subject_list)
673 job_dependency_free(j->subject_list);
674 while (j->object_list)
675 job_dependency_free(j->object_list);
678 assert(!m->transaction_anchor);
681 static void transaction_abort(Manager *m) {
686 while ((j = hashmap_first(m->transaction_jobs)))
688 transaction_delete_job(m, j, true);
692 assert(hashmap_isempty(m->transaction_jobs));
694 transaction_clean_dependencies(m);
697 static void transaction_find_jobs_that_matter_to_anchor(Manager *m, Job *j, unsigned generation) {
702 /* A recursive sweep through the graph that marks all units
703 * that matter to the anchor job, i.e. are directly or
704 * indirectly a dependency of the anchor job via paths that
705 * are fully marked as mattering. */
710 l = m->transaction_anchor;
712 LIST_FOREACH(subject, l, l) {
714 /* This link does not matter */
718 /* This unit has already been marked */
719 if (l->object->generation == generation)
722 l->object->matters_to_anchor = true;
723 l->object->generation = generation;
725 transaction_find_jobs_that_matter_to_anchor(m, l->object, generation);
729 static void transaction_merge_and_delete_job(Manager *m, Job *j, Job *other, JobType t) {
730 JobDependency *l, *last;
734 assert(j->unit == other->unit);
735 assert(!j->installed);
737 /* Merges 'other' into 'j' and then deletes j. */
740 j->state = JOB_WAITING;
741 j->override = j->override || other->override;
743 j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor;
745 /* Patch us in as new owner of the JobDependency objects */
747 LIST_FOREACH(subject, l, other->subject_list) {
748 assert(l->subject == other);
753 /* Merge both lists */
755 last->subject_next = j->subject_list;
757 j->subject_list->subject_prev = last;
758 j->subject_list = other->subject_list;
761 /* Patch us in as new owner of the JobDependency objects */
763 LIST_FOREACH(object, l, other->object_list) {
764 assert(l->object == other);
769 /* Merge both lists */
771 last->object_next = j->object_list;
773 j->object_list->object_prev = last;
774 j->object_list = other->object_list;
777 /* Kill the other job */
778 other->subject_list = NULL;
779 other->object_list = NULL;
780 transaction_delete_job(m, other, true);
782 static bool job_is_conflicted_by(Job *j) {
787 /* Returns true if this job is pulled in by a least one
788 * ConflictedBy dependency. */
790 LIST_FOREACH(object, l, j->object_list)
797 static int delete_one_unmergeable_job(Manager *m, Job *j) {
802 /* Tries to delete one item in the linked list
803 * j->transaction_next->transaction_next->... that conflicts
804 * with another one, in an attempt to make an inconsistent
805 * transaction work. */
807 /* We rely here on the fact that if a merged with b does not
808 * merge with c, either a or b merge with c neither */
809 LIST_FOREACH(transaction, j, j)
810 LIST_FOREACH(transaction, k, j->transaction_next) {
813 /* Is this one mergeable? Then skip it */
814 if (job_type_is_mergeable(j->type, k->type))
817 /* Ok, we found two that conflict, let's see if we can
818 * drop one of them */
819 if (!j->matters_to_anchor && !k->matters_to_anchor) {
821 /* Both jobs don't matter, so let's
822 * find the one that is smarter to
823 * remove. Let's think positive and
824 * rather remove stops then starts --
825 * except if something is being
826 * stopped because it is conflicted by
827 * another unit in which case we
828 * rather remove the start. */
830 log_debug("Looking at job %s/%s conflicted_by=%s", j->unit->id, job_type_to_string(j->type), yes_no(j->type == JOB_STOP && job_is_conflicted_by(j)));
831 log_debug("Looking at job %s/%s conflicted_by=%s", k->unit->id, job_type_to_string(k->type), yes_no(k->type == JOB_STOP && job_is_conflicted_by(k)));
833 if (j->type == JOB_STOP) {
835 if (job_is_conflicted_by(j))
840 } else if (k->type == JOB_STOP) {
842 if (job_is_conflicted_by(k))
849 } else if (!j->matters_to_anchor)
851 else if (!k->matters_to_anchor)
856 /* Ok, we can drop one, so let's do so. */
857 log_debug("Fixing conflicting jobs by deleting job %s/%s", d->unit->id, job_type_to_string(d->type));
858 transaction_delete_job(m, d, true);
865 static int transaction_merge_jobs(Manager *m, DBusError *e) {
872 /* First step, check whether any of the jobs for one specific
873 * task conflict. If so, try to drop one of them. */
874 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
879 LIST_FOREACH(transaction, k, j->transaction_next) {
880 if (job_type_merge(&t, k->type) >= 0)
883 /* OK, we could not merge all jobs for this
884 * action. Let's see if we can get rid of one
887 if ((r = delete_one_unmergeable_job(m, j)) >= 0)
888 /* Ok, we managed to drop one, now
889 * let's ask our callers to call us
890 * again after garbage collecting */
893 /* We couldn't merge anything. Failure */
894 dbus_set_error(e, BUS_ERROR_TRANSACTION_JOBS_CONFLICTING, "Transaction contains conflicting jobs '%s' and '%s' for %s. Probably contradicting requirement dependencies configured.",
895 job_type_to_string(t), job_type_to_string(k->type), k->unit->id);
900 /* Second step, merge the jobs. */
901 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
905 /* Merge all transactions */
906 LIST_FOREACH(transaction, k, j->transaction_next)
907 assert_se(job_type_merge(&t, k->type) == 0);
909 /* If an active job is mergeable, merge it too */
911 job_type_merge(&t, j->unit->job->type); /* Might fail. Which is OK */
913 while ((k = j->transaction_next)) {
915 transaction_merge_and_delete_job(m, k, j, t);
918 transaction_merge_and_delete_job(m, j, k, t);
921 if (j->unit->job && !j->installed)
922 transaction_merge_and_delete_job(m, j, j->unit->job, t);
924 assert(!j->transaction_next);
925 assert(!j->transaction_prev);
931 static void transaction_drop_redundant(Manager *m) {
936 /* Goes through the transaction and removes all jobs that are
945 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
946 bool changes_something = false;
949 LIST_FOREACH(transaction, k, j) {
951 if (!job_is_anchor(k) &&
952 (k->installed || job_type_is_redundant(k->type, unit_active_state(k->unit))) &&
953 (!k->unit->job || !job_type_is_conflicting(k->type, k->unit->job->type)))
956 changes_something = true;
960 if (changes_something)
963 /* log_debug("Found redundant job %s/%s, dropping.", j->unit->id, job_type_to_string(j->type)); */
964 transaction_delete_job(m, j, false);
972 static bool unit_matters_to_anchor(Unit *u, Job *j) {
974 assert(!j->transaction_prev);
976 /* Checks whether at least one of the jobs for this unit
977 * matters to the anchor. */
979 LIST_FOREACH(transaction, j, j)
980 if (j->matters_to_anchor)
986 static int transaction_verify_order_one(Manager *m, Job *j, Job *from, unsigned generation, DBusError *e) {
993 assert(!j->transaction_prev);
995 /* Does a recursive sweep through the ordering graph, looking
996 * for a cycle. If we find cycle we try to break it. */
998 /* Have we seen this before? */
999 if (j->generation == generation) {
1002 /* If the marker is NULL we have been here already and
1003 * decided the job was loop-free from here. Hence
1004 * shortcut things and return right-away. */
1008 /* So, the marker is not NULL and we already have been
1009 * here. We have a cycle. Let's try to break it. We go
1010 * backwards in our path and try to find a suitable
1011 * job to remove. We use the marker to find our way
1012 * back, since smart how we are we stored our way back
1014 log_warning("Found ordering cycle on %s/%s", j->unit->id, job_type_to_string(j->type));
1017 for (k = from; k; k = ((k->generation == generation && k->marker != k) ? k->marker : NULL)) {
1019 log_info("Walked on cycle path to %s/%s", k->unit->id, job_type_to_string(k->type));
1023 !unit_matters_to_anchor(k->unit, k)) {
1024 /* Ok, we can drop this one, so let's
1029 /* Check if this in fact was the beginning of
1037 log_warning("Breaking ordering cycle by deleting job %s/%s", delete->unit->id, job_type_to_string(delete->type));
1038 transaction_delete_unit(m, delete->unit);
1042 log_error("Unable to break cycle");
1044 dbus_set_error(e, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC, "Transaction order is cyclic. See system logs for details.");
1048 /* Make the marker point to where we come from, so that we can
1049 * find our way backwards if we want to break a cycle. We use
1050 * a special marker for the beginning: we point to
1052 j->marker = from ? from : j;
1053 j->generation = generation;
1055 /* We assume that the the dependencies are bidirectional, and
1056 * hence can ignore UNIT_AFTER */
1057 SET_FOREACH(u, j->unit->dependencies[UNIT_BEFORE], i) {
1060 /* Is there a job for this unit? */
1061 if (!(o = hashmap_get(m->transaction_jobs, u)))
1063 /* Ok, there is no job for this in the
1064 * transaction, but maybe there is already one
1069 if ((r = transaction_verify_order_one(m, o, j, generation, e)) < 0)
1073 /* Ok, let's backtrack, and remember that this entry is not on
1074 * our path anymore. */
1080 static int transaction_verify_order(Manager *m, unsigned *generation, DBusError *e) {
1089 /* Check if the ordering graph is cyclic. If it is, try to fix
1090 * that up by dropping one of the jobs. */
1092 g = (*generation)++;
1094 HASHMAP_FOREACH(j, m->transaction_jobs, i)
1095 if ((r = transaction_verify_order_one(m, j, NULL, g, e)) < 0)
1101 static void transaction_collect_garbage(Manager *m) {
1106 /* Drop jobs that are not required by any other job */
1114 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1115 if (j->object_list) {
1116 /* log_debug("Keeping job %s/%s because of %s/%s", */
1117 /* j->unit->id, job_type_to_string(j->type), */
1118 /* j->object_list->subject ? j->object_list->subject->unit->id : "root", */
1119 /* j->object_list->subject ? job_type_to_string(j->object_list->subject->type) : "root"); */
1123 /* log_debug("Garbage collecting job %s/%s", j->unit->id, job_type_to_string(j->type)); */
1124 transaction_delete_job(m, j, true);
1132 static int transaction_is_destructive(Manager *m, DBusError *e) {
1138 /* Checks whether applying this transaction means that
1139 * existing jobs would be replaced */
1141 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1144 assert(!j->transaction_prev);
1145 assert(!j->transaction_next);
1148 j->unit->job != j &&
1149 !job_type_is_superset(j->type, j->unit->job->type)) {
1151 dbus_set_error(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE, "Transaction is destructive.");
1159 static void transaction_minimize_impact(Manager *m) {
1163 /* Drops all unnecessary jobs that reverse already active jobs
1164 * or that stop a running service. */
1172 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1173 LIST_FOREACH(transaction, j, j) {
1174 bool stops_running_service, changes_existing_job;
1176 /* If it matters, we shouldn't drop it */
1177 if (j->matters_to_anchor)
1180 /* Would this stop a running service?
1181 * Would this change an existing job?
1182 * If so, let's drop this entry */
1184 stops_running_service =
1185 j->type == JOB_STOP && UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j->unit));
1187 changes_existing_job =
1189 job_type_is_conflicting(j->type, j->unit->job->type);
1191 if (!stops_running_service && !changes_existing_job)
1194 if (stops_running_service)
1195 log_debug("%s/%s would stop a running service.", j->unit->id, job_type_to_string(j->type));
1197 if (changes_existing_job)
1198 log_debug("%s/%s would change existing job.", j->unit->id, job_type_to_string(j->type));
1200 /* Ok, let's get rid of this */
1201 log_debug("Deleting %s/%s to minimize impact.", j->unit->id, job_type_to_string(j->type));
1203 transaction_delete_job(m, j, true);
1215 static int transaction_apply(Manager *m, JobMode mode) {
1220 /* Moves the transaction jobs to the set of active jobs */
1222 if (mode == JOB_ISOLATE) {
1224 /* When isolating first kill all installed jobs which
1225 * aren't part of the new transaction */
1227 HASHMAP_FOREACH(j, m->jobs, i) {
1228 assert(j->installed);
1230 if (hashmap_get(m->transaction_jobs, j->unit))
1233 /* 'j' itself is safe to remove, but if other jobs
1234 are invalidated recursively, our iterator may become
1235 invalid and we need to start over. */
1236 if (job_finish_and_invalidate(j, JOB_CANCELED) > 0)
1241 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1243 assert(!j->transaction_prev);
1244 assert(!j->transaction_next);
1249 if ((r = hashmap_put(m->jobs, UINT32_TO_PTR(j->id), j)) < 0)
1253 while ((j = hashmap_steal_first(m->transaction_jobs))) {
1255 /* log_debug("Skipping already installed job %s/%s as %u", j->unit->id, job_type_to_string(j->type), (unsigned) j->id); */
1260 job_free(j->unit->job);
1263 j->installed = true;
1264 m->n_installed_jobs ++;
1266 /* We're fully installed. Now let's free data we don't
1269 assert(!j->transaction_next);
1270 assert(!j->transaction_prev);
1272 job_add_to_run_queue(j);
1273 job_add_to_dbus_queue(j);
1276 log_debug("Installed new job %s/%s as %u", j->unit->id, job_type_to_string(j->type), (unsigned) j->id);
1279 /* As last step, kill all remaining job dependencies. */
1280 transaction_clean_dependencies(m);
1286 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1290 hashmap_remove(m->jobs, UINT32_TO_PTR(j->id));
1296 static int transaction_activate(Manager *m, JobMode mode, DBusError *e) {
1298 unsigned generation = 1;
1302 /* This applies the changes recorded in transaction_jobs to
1303 * the actual list of jobs, if possible. */
1305 /* First step: figure out which jobs matter */
1306 transaction_find_jobs_that_matter_to_anchor(m, NULL, generation++);
1308 /* Second step: Try not to stop any running services if
1309 * we don't have to. Don't try to reverse running
1310 * jobs if we don't have to. */
1311 if (mode == JOB_FAIL)
1312 transaction_minimize_impact(m);
1314 /* Third step: Drop redundant jobs */
1315 transaction_drop_redundant(m);
1318 /* Fourth step: Let's remove unneeded jobs that might
1320 if (mode != JOB_ISOLATE)
1321 transaction_collect_garbage(m);
1323 /* Fifth step: verify order makes sense and correct
1324 * cycles if necessary and possible */
1325 if ((r = transaction_verify_order(m, &generation, e)) >= 0)
1329 log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error(e, r));
1333 /* Let's see if the resulting transaction ordering
1334 * graph is still cyclic... */
1338 /* Sixth step: let's drop unmergeable entries if
1339 * necessary and possible, merge entries we can
1341 if ((r = transaction_merge_jobs(m, e)) >= 0)
1345 log_warning("Requested transaction contains unmergeable jobs: %s", bus_error(e, r));
1349 /* Seventh step: an entry got dropped, let's garbage
1350 * collect its dependencies. */
1351 if (mode != JOB_ISOLATE)
1352 transaction_collect_garbage(m);
1354 /* Let's see if the resulting transaction still has
1355 * unmergeable entries ... */
1358 /* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */
1359 transaction_drop_redundant(m);
1361 /* Ninth step: check whether we can actually apply this */
1362 if (mode == JOB_FAIL)
1363 if ((r = transaction_is_destructive(m, e)) < 0) {
1364 log_notice("Requested transaction contradicts existing jobs: %s", bus_error(e, r));
1368 /* Tenth step: apply changes */
1369 if ((r = transaction_apply(m, mode)) < 0) {
1370 log_warning("Failed to apply transaction: %s", strerror(-r));
1374 assert(hashmap_isempty(m->transaction_jobs));
1375 assert(!m->transaction_anchor);
1380 transaction_abort(m);
1384 static Job* transaction_add_one_job(Manager *m, JobType type, Unit *unit, bool override, bool *is_new) {
1390 /* Looks for an existing prospective job and returns that. If
1391 * it doesn't exist it is created and added to the prospective
1394 f = hashmap_get(m->transaction_jobs, unit);
1396 LIST_FOREACH(transaction, j, f) {
1397 assert(j->unit == unit);
1399 if (j->type == type) {
1406 if (unit->job && unit->job->type == type)
1408 else if (!(j = job_new(m, type, unit)))
1413 j->matters_to_anchor = false;
1414 j->override = override;
1416 LIST_PREPEND(Job, transaction, f, j);
1418 if (hashmap_replace(m->transaction_jobs, unit, f) < 0) {
1426 /* log_debug("Added job %s/%s to transaction.", unit->id, job_type_to_string(type)); */
1431 void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies) {
1435 if (j->transaction_prev)
1436 j->transaction_prev->transaction_next = j->transaction_next;
1437 else if (j->transaction_next)
1438 hashmap_replace(m->transaction_jobs, j->unit, j->transaction_next);
1440 hashmap_remove_value(m->transaction_jobs, j->unit, j);
1442 if (j->transaction_next)
1443 j->transaction_next->transaction_prev = j->transaction_prev;
1445 j->transaction_prev = j->transaction_next = NULL;
1447 while (j->subject_list)
1448 job_dependency_free(j->subject_list);
1450 while (j->object_list) {
1451 Job *other = j->object_list->matters ? j->object_list->subject : NULL;
1453 job_dependency_free(j->object_list);
1455 if (other && delete_dependencies) {
1456 log_debug("Deleting job %s/%s as dependency of job %s/%s",
1457 other->unit->id, job_type_to_string(other->type),
1458 j->unit->id, job_type_to_string(j->type));
1459 transaction_delete_job(m, other, delete_dependencies);
1464 static int transaction_add_job_and_dependencies(
1472 bool ignore_requirements,
1483 assert(type < _JOB_TYPE_MAX);
1486 /* log_debug("Pulling in %s/%s from %s/%s", */
1487 /* unit->id, job_type_to_string(type), */
1488 /* by ? by->unit->id : "NA", */
1489 /* by ? job_type_to_string(by->type) : "NA"); */
1491 if (unit->load_state != UNIT_LOADED &&
1492 unit->load_state != UNIT_ERROR &&
1493 unit->load_state != UNIT_MASKED) {
1494 dbus_set_error(e, BUS_ERROR_LOAD_FAILED, "Unit %s is not loaded properly.", unit->id);
1498 if (type != JOB_STOP && unit->load_state == UNIT_ERROR) {
1499 dbus_set_error(e, BUS_ERROR_LOAD_FAILED,
1500 "Unit %s failed to load: %s. "
1501 "See system logs and 'systemctl status %s' for details.",
1503 strerror(-unit->load_error),
1508 if (type != JOB_STOP && unit->load_state == UNIT_MASKED) {
1509 dbus_set_error(e, BUS_ERROR_MASKED, "Unit %s is masked.", unit->id);
1513 if (!unit_job_is_applicable(unit, type)) {
1514 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->id);
1518 /* First add the job. */
1519 if (!(ret = transaction_add_one_job(m, type, unit, override, &is_new)))
1522 ret->ignore_order = ret->ignore_order || ignore_order;
1524 /* Then, add a link to the job. */
1525 if (!job_dependency_new(by, ret, matters, conflicts))
1528 if (is_new && !ignore_requirements) {
1531 /* If we are following some other unit, make sure we
1532 * add all dependencies of everybody following. */
1533 if (unit_following_set(ret->unit, &following) > 0) {
1534 SET_FOREACH(dep, following, i)
1535 if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, false, override, false, false, ignore_order, e, NULL)) < 0) {
1536 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));
1542 set_free(following);
1545 /* Finally, recursively add in all dependencies. */
1546 if (type == JOB_START || type == JOB_RELOAD_OR_START) {
1547 SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRES], i)
1548 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1556 SET_FOREACH(dep, ret->unit->dependencies[UNIT_BIND_TO], i)
1557 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1566 SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1567 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, !override, override, false, false, ignore_order, e, NULL)) < 0) {
1568 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));
1574 SET_FOREACH(dep, ret->unit->dependencies[UNIT_WANTS], i)
1575 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, false, false, false, false, ignore_order, e, NULL)) < 0) {
1576 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));
1582 SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUISITE], i)
1583 if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1592 SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
1593 if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, !override, override, false, false, ignore_order, e, NULL)) < 0) {
1594 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));
1600 SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTS], i)
1601 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, true, override, true, false, ignore_order, e, NULL)) < 0) {
1610 SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTED_BY], i)
1611 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, false, override, false, false, ignore_order, e, NULL)) < 0) {
1612 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));
1620 if (type == JOB_STOP || type == JOB_RESTART || type == JOB_TRY_RESTART) {
1622 SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRED_BY], i)
1623 if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1632 SET_FOREACH(dep, ret->unit->dependencies[UNIT_BOUND_BY], i)
1633 if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1643 if (type == JOB_RELOAD || type == JOB_RELOAD_OR_START) {
1645 SET_FOREACH(dep, ret->unit->dependencies[UNIT_PROPAGATE_RELOAD_TO], i) {
1646 r = transaction_add_job_and_dependencies(m, JOB_RELOAD, dep, ret, false, override, false, false, ignore_order, e, NULL);
1649 log_warning("Cannot add dependency reload job for unit %s, ignoring: %s", dep->id, bus_error(e, r));
1657 /* JOB_VERIFY_STARTED, JOB_RELOAD require no dependency handling */
1669 static int transaction_add_isolate_jobs(Manager *m) {
1677 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
1679 /* ignore aliases */
1683 if (u->ignore_on_isolate)
1686 /* No need to stop inactive jobs */
1687 if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) && !u->job)
1690 /* Is there already something listed for this? */
1691 if (hashmap_get(m->transaction_jobs, u))
1694 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, u, NULL, true, false, false, false, false, NULL, NULL)) < 0)
1695 log_warning("Cannot add isolate job for unit %s, ignoring: %s", u->id, strerror(-r));
1701 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, DBusError *e, Job **_ret) {
1706 assert(type < _JOB_TYPE_MAX);
1708 assert(mode < _JOB_MODE_MAX);
1710 if (mode == JOB_ISOLATE && type != JOB_START) {
1711 dbus_set_error(e, BUS_ERROR_INVALID_JOB_MODE, "Isolate is only valid for start.");
1715 if (mode == JOB_ISOLATE && !unit->allow_isolate) {
1716 dbus_set_error(e, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated.");
1720 log_debug("Trying to enqueue job %s/%s/%s", unit->id, job_type_to_string(type), job_mode_to_string(mode));
1722 if ((r = transaction_add_job_and_dependencies(m, type, unit, NULL, true, override, false,
1723 mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS,
1724 mode == JOB_IGNORE_DEPENDENCIES, e, &ret)) < 0) {
1725 transaction_abort(m);
1729 if (mode == JOB_ISOLATE)
1730 if ((r = transaction_add_isolate_jobs(m)) < 0) {
1731 transaction_abort(m);
1735 if ((r = transaction_activate(m, mode, e)) < 0)
1738 log_debug("Enqueued job %s/%s as %u", unit->id, job_type_to_string(type), (unsigned) ret->id);
1746 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, DBusError *e, Job **_ret) {
1751 assert(type < _JOB_TYPE_MAX);
1753 assert(mode < _JOB_MODE_MAX);
1755 if ((r = manager_load_unit(m, name, NULL, NULL, &unit)) < 0)
1758 return manager_add_job(m, type, unit, mode, override, e, _ret);
1761 Job *manager_get_job(Manager *m, uint32_t id) {
1764 return hashmap_get(m->jobs, UINT32_TO_PTR(id));
1767 Unit *manager_get_unit(Manager *m, const char *name) {
1771 return hashmap_get(m->units, name);
1774 unsigned manager_dispatch_load_queue(Manager *m) {
1780 /* Make sure we are not run recursively */
1781 if (m->dispatching_load_queue)
1784 m->dispatching_load_queue = true;
1786 /* Dispatches the load queue. Takes a unit from the queue and
1787 * tries to load its data until the queue is empty */
1789 while ((u = m->load_queue)) {
1790 assert(u->in_load_queue);
1796 m->dispatching_load_queue = false;
1800 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret) {
1806 assert(name || path);
1808 /* This will prepare the unit for loading, but not actually
1809 * load anything from disk. */
1811 if (path && !is_path(path)) {
1812 dbus_set_error(e, BUS_ERROR_INVALID_PATH, "Path %s is not absolute.", path);
1817 name = file_name_from_path(path);
1819 t = unit_name_to_type(name);
1821 if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid_no_type(name, false)) {
1822 dbus_set_error(e, BUS_ERROR_INVALID_NAME, "Unit name %s is not valid.", name);
1826 ret = manager_get_unit(m, name);
1832 ret = unit_new(m, unit_vtable[t]->object_size);
1837 ret->fragment_path = strdup(path);
1838 if (!ret->fragment_path) {
1844 if ((r = unit_add_name(ret, name)) < 0) {
1849 unit_add_to_load_queue(ret);
1850 unit_add_to_dbus_queue(ret);
1851 unit_add_to_gc_queue(ret);
1859 int manager_load_unit(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret) {
1864 /* This will load the service information files, but not actually
1865 * start any services or anything. */
1867 if ((r = manager_load_unit_prepare(m, name, path, e, _ret)) != 0)
1870 manager_dispatch_load_queue(m);
1873 *_ret = unit_follow_merge(*_ret);
1878 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix) {
1885 HASHMAP_FOREACH(j, s->jobs, i)
1886 job_dump(j, f, prefix);
1889 void manager_dump_units(Manager *s, FILE *f, const char *prefix) {
1897 HASHMAP_FOREACH_KEY(u, t, s->units, i)
1899 unit_dump(u, f, prefix);
1902 void manager_clear_jobs(Manager *m) {
1907 transaction_abort(m);
1909 while ((j = hashmap_first(m->jobs)))
1910 job_finish_and_invalidate(j, JOB_CANCELED);
1913 unsigned manager_dispatch_run_queue(Manager *m) {
1917 if (m->dispatching_run_queue)
1920 m->dispatching_run_queue = true;
1922 while ((j = m->run_queue)) {
1923 assert(j->installed);
1924 assert(j->in_run_queue);
1926 job_run_and_invalidate(j);
1930 m->dispatching_run_queue = false;
1934 unsigned manager_dispatch_dbus_queue(Manager *m) {
1941 if (m->dispatching_dbus_queue)
1944 m->dispatching_dbus_queue = true;
1946 while ((u = m->dbus_unit_queue)) {
1947 assert(u->in_dbus_queue);
1949 bus_unit_send_change_signal(u);
1953 while ((j = m->dbus_job_queue)) {
1954 assert(j->in_dbus_queue);
1956 bus_job_send_change_signal(j);
1960 m->dispatching_dbus_queue = false;
1964 static int manager_process_notify_fd(Manager *m) {
1971 struct msghdr msghdr;
1973 struct ucred *ucred;
1975 struct cmsghdr cmsghdr;
1976 uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
1982 iovec.iov_base = buf;
1983 iovec.iov_len = sizeof(buf)-1;
1987 msghdr.msg_iov = &iovec;
1988 msghdr.msg_iovlen = 1;
1989 msghdr.msg_control = &control;
1990 msghdr.msg_controllen = sizeof(control);
1992 if ((n = recvmsg(m->notify_watch.fd, &msghdr, MSG_DONTWAIT)) <= 0) {
1996 if (errno == EAGAIN || errno == EINTR)
2002 if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) ||
2003 control.cmsghdr.cmsg_level != SOL_SOCKET ||
2004 control.cmsghdr.cmsg_type != SCM_CREDENTIALS ||
2005 control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) {
2006 log_warning("Received notify message without credentials. Ignoring.");
2010 ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);
2012 if (!(u = hashmap_get(m->watch_pids, LONG_TO_PTR(ucred->pid))))
2013 if (!(u = cgroup_unit_by_pid(m, ucred->pid))) {
2014 log_warning("Cannot find unit for notify message of PID %lu.", (unsigned long) ucred->pid);
2018 assert((size_t) n < sizeof(buf));
2020 if (!(tags = strv_split(buf, "\n\r")))
2023 log_debug("Got notification message for unit %s", u->id);
2025 if (UNIT_VTABLE(u)->notify_message)
2026 UNIT_VTABLE(u)->notify_message(u, ucred->pid, tags);
2034 static int manager_dispatch_sigchld(Manager *m) {
2044 /* First we call waitd() for a PID and do not reap the
2045 * zombie. That way we can still access /proc/$PID for
2046 * it while it is a zombie. */
2047 if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) {
2049 if (errno == ECHILD)
2061 if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) {
2064 get_process_comm(si.si_pid, &name);
2065 log_debug("Got SIGCHLD for process %lu (%s)", (unsigned long) si.si_pid, strna(name));
2069 /* Let's flush any message the dying child might still
2070 * have queued for us. This ensures that the process
2071 * still exists in /proc so that we can figure out
2072 * which cgroup and hence unit it belongs to. */
2073 if ((r = manager_process_notify_fd(m)) < 0)
2076 /* And now figure out the unit this belongs to */
2077 if (!(u = hashmap_get(m->watch_pids, LONG_TO_PTR(si.si_pid))))
2078 u = cgroup_unit_by_pid(m, si.si_pid);
2080 /* And now, we actually reap the zombie. */
2081 if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {
2088 if (si.si_code != CLD_EXITED && si.si_code != CLD_KILLED && si.si_code != CLD_DUMPED)
2091 log_debug("Child %lu died (code=%s, status=%i/%s)",
2092 (long unsigned) si.si_pid,
2093 sigchld_code_to_string(si.si_code),
2095 strna(si.si_code == CLD_EXITED
2096 ? exit_status_to_string(si.si_status, EXIT_STATUS_FULL)
2097 : signal_to_string(si.si_status)));
2102 log_debug("Child %lu belongs to %s", (long unsigned) si.si_pid, u->id);
2104 hashmap_remove(m->watch_pids, LONG_TO_PTR(si.si_pid));
2105 UNIT_VTABLE(u)->sigchld_event(u, si.si_pid, si.si_code, si.si_status);
2111 static int manager_start_target(Manager *m, const char *name, JobMode mode) {
2115 dbus_error_init(&error);
2117 log_debug("Activating special unit %s", name);
2119 if ((r = manager_add_job_by_name(m, JOB_START, name, mode, true, &error, NULL)) < 0)
2120 log_error("Failed to enqueue %s job: %s", name, bus_error(&error, r));
2122 dbus_error_free(&error);
2127 static int manager_process_signal_fd(Manager *m) {
2129 struct signalfd_siginfo sfsi;
2130 bool sigchld = false;
2135 if ((n = read(m->signal_watch.fd, &sfsi, sizeof(sfsi))) != sizeof(sfsi)) {
2140 if (errno == EINTR || errno == EAGAIN)
2146 if (sfsi.ssi_pid > 0) {
2149 get_process_comm(sfsi.ssi_pid, &p);
2151 log_debug("Received SIG%s from PID %lu (%s).",
2152 signal_to_string(sfsi.ssi_signo),
2153 (unsigned long) sfsi.ssi_pid, strna(p));
2156 log_debug("Received SIG%s.", signal_to_string(sfsi.ssi_signo));
2158 switch (sfsi.ssi_signo) {
2165 if (m->running_as == MANAGER_SYSTEM) {
2166 /* This is for compatibility with the
2167 * original sysvinit */
2168 m->exit_code = MANAGER_REEXECUTE;
2175 if (m->running_as == MANAGER_SYSTEM) {
2176 manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE);
2180 /* Run the exit target if there is one, if not, just exit. */
2181 if (manager_start_target(m, SPECIAL_EXIT_TARGET, JOB_REPLACE) < 0) {
2182 m->exit_code = MANAGER_EXIT;
2189 if (m->running_as == MANAGER_SYSTEM)
2190 manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE);
2192 /* This is a nop on non-init */
2196 if (m->running_as == MANAGER_SYSTEM)
2197 manager_start_target(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE);
2199 /* This is a nop on non-init */
2205 u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);
2207 if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) {
2208 log_info("Trying to reconnect to bus...");
2212 if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) {
2213 log_info("Loading D-Bus service...");
2214 manager_start_target(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE);
2225 if (!(f = open_memstream(&dump, &size))) {
2226 log_warning("Failed to allocate memory stream.");
2230 manager_dump_units(m, f, "\t");
2231 manager_dump_jobs(m, f, "\t");
2236 log_warning("Failed to write status stream");
2241 log_dump(LOG_INFO, dump);
2248 m->exit_code = MANAGER_RELOAD;
2253 /* Starting SIGRTMIN+0 */
2254 static const char * const target_table[] = {
2255 [0] = SPECIAL_DEFAULT_TARGET,
2256 [1] = SPECIAL_RESCUE_TARGET,
2257 [2] = SPECIAL_EMERGENCY_TARGET,
2258 [3] = SPECIAL_HALT_TARGET,
2259 [4] = SPECIAL_POWEROFF_TARGET,
2260 [5] = SPECIAL_REBOOT_TARGET,
2261 [6] = SPECIAL_KEXEC_TARGET
2264 /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
2265 static const ManagerExitCode code_table[] = {
2267 [1] = MANAGER_POWEROFF,
2268 [2] = MANAGER_REBOOT,
2272 if ((int) sfsi.ssi_signo >= SIGRTMIN+0 &&
2273 (int) sfsi.ssi_signo < SIGRTMIN+(int) ELEMENTSOF(target_table)) {
2274 int idx = (int) sfsi.ssi_signo - SIGRTMIN;
2275 manager_start_target(m, target_table[idx],
2276 (idx == 1 || idx == 2) ? JOB_ISOLATE : JOB_REPLACE);
2280 if ((int) sfsi.ssi_signo >= SIGRTMIN+13 &&
2281 (int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(code_table)) {
2282 m->exit_code = code_table[sfsi.ssi_signo - SIGRTMIN - 13];
2286 switch (sfsi.ssi_signo - SIGRTMIN) {
2289 log_debug("Enabling showing of status.");
2290 manager_set_show_status(m, true);
2294 log_debug("Disabling showing of status.");
2295 manager_set_show_status(m, false);
2299 log_set_max_level(LOG_DEBUG);
2300 log_notice("Setting log level to debug.");
2304 log_set_max_level(LOG_INFO);
2305 log_notice("Setting log level to info.");
2309 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
2310 log_notice("Setting log target to journal-or-kmsg.");
2314 log_set_target(LOG_TARGET_CONSOLE);
2315 log_notice("Setting log target to console.");
2319 log_set_target(LOG_TARGET_KMSG);
2320 log_notice("Setting log target to kmsg.");
2324 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
2325 log_notice("Setting log target to syslog-or-kmsg.");
2329 log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo));
2336 return manager_dispatch_sigchld(m);
2341 static int process_event(Manager *m, struct epoll_event *ev) {
2348 assert_se(w = ev->data.ptr);
2350 if (w->type == WATCH_INVALID)
2357 /* An incoming signal? */
2358 if (ev->events != EPOLLIN)
2361 if ((r = manager_process_signal_fd(m)) < 0)
2368 /* An incoming daemon notification event? */
2369 if (ev->events != EPOLLIN)
2372 if ((r = manager_process_notify_fd(m)) < 0)
2379 /* Some fd event, to be dispatched to the units */
2380 UNIT_VTABLE(w->data.unit)->fd_event(w->data.unit, w->fd, ev->events, w);
2383 case WATCH_UNIT_TIMER:
2384 case WATCH_JOB_TIMER: {
2388 /* Some timer event, to be dispatched to the units */
2389 if ((k = read(w->fd, &v, sizeof(v))) != sizeof(v)) {
2391 if (k < 0 && (errno == EINTR || errno == EAGAIN))
2394 return k < 0 ? -errno : -EIO;
2397 if (w->type == WATCH_UNIT_TIMER)
2398 UNIT_VTABLE(w->data.unit)->timer_event(w->data.unit, v, w);
2400 job_timer_event(w->data.job, v, w);
2405 /* Some mount table change, intended for the mount subsystem */
2406 mount_fd_event(m, ev->events);
2410 /* Some swap table change, intended for the swap subsystem */
2411 swap_fd_event(m, ev->events);
2415 /* Some notification from udev, intended for the device subsystem */
2416 device_fd_event(m, ev->events);
2419 case WATCH_DBUS_WATCH:
2420 bus_watch_event(m, w, ev->events);
2423 case WATCH_DBUS_TIMEOUT:
2424 bus_timeout_event(m, w, ev->events);
2428 log_error("event type=%i", w->type);
2429 assert_not_reached("Unknown epoll event type.");
2435 int manager_loop(Manager *m) {
2439 RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000);
2442 m->exit_code = MANAGER_RUNNING;
2444 /* Release the path cache */
2445 set_free_free(m->unit_path_cache);
2446 m->unit_path_cache = NULL;
2448 manager_check_finished(m);
2450 /* There might still be some zombies hanging around from
2451 * before we were exec()'ed. Leat's reap them */
2452 r = manager_dispatch_sigchld(m);
2456 /* Sleep for half the watchdog time */
2457 if (m->runtime_watchdog > 0 && m->running_as == MANAGER_SYSTEM) {
2458 wait_msec = (int) (m->runtime_watchdog / 2 / USEC_PER_MSEC);
2463 while (m->exit_code == MANAGER_RUNNING) {
2464 struct epoll_event event;
2470 if (!ratelimit_test(&rl)) {
2471 /* Yay, something is going seriously wrong, pause a little */
2472 log_warning("Looping too fast. Throttling execution a little.");
2477 if (manager_dispatch_load_queue(m) > 0)
2480 if (manager_dispatch_run_queue(m) > 0)
2483 if (bus_dispatch(m) > 0)
2486 if (manager_dispatch_cleanup_queue(m) > 0)
2489 if (manager_dispatch_gc_queue(m) > 0)
2492 if (manager_dispatch_dbus_queue(m) > 0)
2495 if (swap_dispatch_reload(m) > 0)
2498 n = epoll_wait(m->epoll_fd, &event, 1, wait_msec);
2510 r = process_event(m, &event);
2515 return m->exit_code;
2518 int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u) {
2526 if (!startswith(s, "/org/freedesktop/systemd1/unit/"))
2529 if (!(n = bus_path_unescape(s+31)))
2532 u = manager_get_unit(m, n);
2543 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) {
2552 if (!startswith(s, "/org/freedesktop/systemd1/job/"))
2555 if ((r = safe_atou(s + 30, &id)) < 0)
2558 if (!(j = manager_get_job(m, id)))
2566 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success) {
2571 if (m->audit_fd < 0)
2574 /* Don't generate audit events if the service was already
2575 * started and we're just deserializing */
2576 if (m->n_reloading > 0)
2579 if (m->running_as != MANAGER_SYSTEM)
2582 if (u->type != UNIT_SERVICE)
2585 if (!(p = unit_name_to_prefix_and_instance(u->id))) {
2586 log_error("Failed to allocate unit name for audit message: %s", strerror(ENOMEM));
2590 if (audit_log_user_comm_message(m->audit_fd, type, "", p, NULL, NULL, NULL, success) < 0) {
2591 log_warning("Failed to send audit message: %m");
2593 if (errno == EPERM) {
2594 /* We aren't allowed to send audit messages?
2595 * Then let's not retry again, to avoid
2596 * spamming the user with the same and same
2597 * messages over and over. */
2599 audit_close(m->audit_fd);
2609 void manager_send_unit_plymouth(Manager *m, Unit *u) {
2611 union sockaddr_union sa;
2613 char *message = NULL;
2615 /* Don't generate plymouth events if the service was already
2616 * started and we're just deserializing */
2617 if (m->n_reloading > 0)
2620 if (m->running_as != MANAGER_SYSTEM)
2623 if (u->type != UNIT_SERVICE &&
2624 u->type != UNIT_MOUNT &&
2625 u->type != UNIT_SWAP)
2628 /* We set SOCK_NONBLOCK here so that we rather drop the
2629 * message then wait for plymouth */
2630 if ((fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
2631 log_error("socket() failed: %m");
2636 sa.sa.sa_family = AF_UNIX;
2637 strncpy(sa.un.sun_path+1, "/org/freedesktop/plymouthd", sizeof(sa.un.sun_path)-1);
2638 if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {
2640 if (errno != EPIPE &&
2643 errno != ECONNREFUSED &&
2644 errno != ECONNRESET &&
2645 errno != ECONNABORTED)
2646 log_error("connect() failed: %m");
2651 if (asprintf(&message, "U\002%c%s%n", (int) (strlen(u->id) + 1), u->id, &n) < 0) {
2652 log_error("Out of memory");
2657 if (write(fd, message, n + 1) != n + 1) {
2659 if (errno != EPIPE &&
2662 errno != ECONNREFUSED &&
2663 errno != ECONNRESET &&
2664 errno != ECONNABORTED)
2665 log_error("Failed to write Plymouth message: %m");
2672 close_nointr_nofail(fd);
2677 void manager_dispatch_bus_name_owner_changed(
2680 const char* old_owner,
2681 const char *new_owner) {
2688 if (!(u = hashmap_get(m->watch_bus, name)))
2691 UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner);
2694 void manager_dispatch_bus_query_pid_done(
2705 if (!(u = hashmap_get(m->watch_bus, name)))
2708 UNIT_VTABLE(u)->bus_query_pid_done(u, name, pid);
2711 int manager_open_serialization(Manager *m, FILE **_f) {
2719 if (m->running_as == MANAGER_SYSTEM)
2720 asprintf(&path, "/run/systemd/dump-%lu-XXXXXX", (unsigned long) getpid());
2722 asprintf(&path, "/tmp/systemd-dump-%lu-XXXXXX", (unsigned long) getpid());
2727 saved_umask = umask(0077);
2728 fd = mkostemp(path, O_RDWR|O_CLOEXEC);
2738 log_debug("Serializing state to %s", path);
2741 if (!(f = fdopen(fd, "w+")))
2749 int manager_serialize(Manager *m, FILE *f, FDSet *fds) {
2761 fprintf(f, "current-job-id=%i\n", m->current_job_id);
2762 fprintf(f, "taint-usr=%s\n", yes_no(m->taint_usr));
2764 dual_timestamp_serialize(f, "initrd-timestamp", &m->initrd_timestamp);
2765 dual_timestamp_serialize(f, "startup-timestamp", &m->startup_timestamp);
2766 dual_timestamp_serialize(f, "finish-timestamp", &m->finish_timestamp);
2770 HASHMAP_FOREACH_KEY(u, t, m->units, i) {
2774 if (!unit_can_serialize(u))
2781 if ((r = unit_serialize(u, f, fds)) < 0) {
2787 assert(m->n_reloading > 0);
2793 r = bus_fdset_add_all(m, fds);
2800 int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
2806 log_debug("Deserializing state...");
2811 char line[LINE_MAX], *l;
2813 if (!fgets(line, sizeof(line), f)) {
2828 if (startswith(l, "current-job-id=")) {
2831 if (safe_atou32(l+15, &id) < 0)
2832 log_debug("Failed to parse current job id value %s", l+15);
2834 m->current_job_id = MAX(m->current_job_id, id);
2835 } else if (startswith(l, "taint-usr=")) {
2838 if ((b = parse_boolean(l+10)) < 0)
2839 log_debug("Failed to parse taint /usr flag %s", l+10);
2841 m->taint_usr = m->taint_usr || b;
2842 } else if (startswith(l, "initrd-timestamp="))
2843 dual_timestamp_deserialize(l+17, &m->initrd_timestamp);
2844 else if (startswith(l, "startup-timestamp="))
2845 dual_timestamp_deserialize(l+18, &m->startup_timestamp);
2846 else if (startswith(l, "finish-timestamp="))
2847 dual_timestamp_deserialize(l+17, &m->finish_timestamp);
2849 log_debug("Unknown serialization item '%s'", l);
2854 char name[UNIT_NAME_MAX+2];
2857 if (!fgets(name, sizeof(name), f)) {
2868 if ((r = manager_load_unit(m, strstrip(name), NULL, NULL, &u)) < 0)
2871 if ((r = unit_deserialize(u, f, fds)) < 0)
2881 assert(m->n_reloading > 0);
2887 int manager_reload(Manager *m) {
2894 if ((r = manager_open_serialization(m, &f)) < 0)
2899 if (!(fds = fdset_new())) {
2905 if ((r = manager_serialize(m, f, fds)) < 0) {
2910 if (fseeko(f, 0, SEEK_SET) < 0) {
2916 /* From here on there is no way back. */
2917 manager_clear_jobs_and_units(m);
2918 manager_undo_generators(m);
2920 /* Find new unit paths */
2921 lookup_paths_free(&m->lookup_paths);
2922 if ((q = lookup_paths_init(&m->lookup_paths, m->running_as, true)) < 0)
2925 manager_run_generators(m);
2927 manager_build_unit_path_cache(m);
2929 /* First, enumerate what we can from all config files */
2930 if ((q = manager_enumerate(m)) < 0)
2933 /* Second, deserialize our stored data */
2934 if ((q = manager_deserialize(m, f, fds)) < 0)
2940 /* Third, fire things up! */
2941 if ((q = manager_coldplug(m)) < 0)
2944 assert(m->n_reloading > 0);
2957 bool manager_is_booting_or_shutting_down(Manager *m) {
2962 /* Is the initial job still around? */
2963 if (manager_get_job(m, m->default_unit_job_id))
2966 /* Is there a job for the shutdown target? */
2967 u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
2974 void manager_reset_failed(Manager *m) {
2980 HASHMAP_FOREACH(u, m->units, i)
2981 unit_reset_failed(u);
2984 bool manager_unit_pending_inactive(Manager *m, const char *name) {
2990 /* Returns true if the unit is inactive or going down */
2991 if (!(u = manager_get_unit(m, name)))
2994 return unit_pending_inactive(u);
2997 void manager_check_finished(Manager *m) {
2998 char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX];
2999 usec_t kernel_usec = 0, initrd_usec = 0, userspace_usec = 0, total_usec = 0;
3003 if (dual_timestamp_is_set(&m->finish_timestamp))
3006 if (hashmap_size(m->jobs) > 0)
3009 dual_timestamp_get(&m->finish_timestamp);
3011 if (m->running_as == MANAGER_SYSTEM && detect_container(NULL) <= 0) {
3013 userspace_usec = m->finish_timestamp.monotonic - m->startup_timestamp.monotonic;
3014 total_usec = m->finish_timestamp.monotonic;
3016 if (dual_timestamp_is_set(&m->initrd_timestamp)) {
3018 kernel_usec = m->initrd_timestamp.monotonic;
3019 initrd_usec = m->startup_timestamp.monotonic - m->initrd_timestamp.monotonic;
3021 log_info("Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.",
3022 format_timespan(kernel, sizeof(kernel), kernel_usec),
3023 format_timespan(initrd, sizeof(initrd), initrd_usec),
3024 format_timespan(userspace, sizeof(userspace), userspace_usec),
3025 format_timespan(sum, sizeof(sum), total_usec));
3027 kernel_usec = m->startup_timestamp.monotonic;
3030 log_info("Startup finished in %s (kernel) + %s (userspace) = %s.",
3031 format_timespan(kernel, sizeof(kernel), kernel_usec),
3032 format_timespan(userspace, sizeof(userspace), userspace_usec),
3033 format_timespan(sum, sizeof(sum), total_usec));
3036 userspace_usec = initrd_usec = kernel_usec = 0;
3037 total_usec = m->finish_timestamp.monotonic - m->startup_timestamp.monotonic;
3039 log_debug("Startup finished in %s.",
3040 format_timespan(sum, sizeof(sum), total_usec));
3043 bus_broadcast_finished(m, kernel_usec, initrd_usec, userspace_usec, total_usec);
3046 "READY=1\nSTATUS=Startup finished in %s.",
3047 format_timespan(sum, sizeof(sum), total_usec));
3050 void manager_run_generators(Manager *m) {
3052 const char *generator_path;
3053 const char *argv[3];
3058 generator_path = m->running_as == MANAGER_SYSTEM ? SYSTEM_GENERATOR_PATH : USER_GENERATOR_PATH;
3059 if (!(d = opendir(generator_path))) {
3061 if (errno == ENOENT)
3064 log_error("Failed to enumerate generator directory: %m");
3068 if (!m->generator_unit_path) {
3070 char user_path[] = "/tmp/systemd-generator-XXXXXX";
3072 if (m->running_as == MANAGER_SYSTEM && getpid() == 1) {
3073 p = "/run/systemd/generator";
3075 if (mkdir_p(p, 0755) < 0) {
3076 log_error("Failed to create generator directory: %m");
3081 if (!(p = mkdtemp(user_path))) {
3082 log_error("Failed to create generator directory: %m");
3087 if (!(m->generator_unit_path = strdup(p))) {
3088 log_error("Failed to allocate generator unit path.");
3093 argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */
3094 argv[1] = m->generator_unit_path;
3098 execute_directory(generator_path, d, (char**) argv);
3101 if (rmdir(m->generator_unit_path) >= 0) {
3102 /* Uh? we were able to remove this dir? I guess that
3103 * means the directory was empty, hence let's shortcut
3106 free(m->generator_unit_path);
3107 m->generator_unit_path = NULL;
3111 if (!strv_find(m->lookup_paths.unit_path, m->generator_unit_path)) {
3114 if (!(l = strv_append(m->lookup_paths.unit_path, m->generator_unit_path))) {
3115 log_error("Failed to add generator directory to unit search path: %m");
3119 strv_free(m->lookup_paths.unit_path);
3120 m->lookup_paths.unit_path = l;
3122 log_debug("Added generator unit path %s to search path.", m->generator_unit_path);
3130 void manager_undo_generators(Manager *m) {
3133 if (!m->generator_unit_path)
3136 strv_remove(m->lookup_paths.unit_path, m->generator_unit_path);
3137 rm_rf(m->generator_unit_path, false, true, false);
3139 free(m->generator_unit_path);
3140 m->generator_unit_path = NULL;
3143 int manager_set_default_controllers(Manager *m, char **controllers) {
3148 if (!(l = strv_copy(controllers)))
3151 strv_free(m->default_controllers);
3152 m->default_controllers = l;
3157 void manager_recheck_journal(Manager *m) {
3162 if (m->running_as != MANAGER_SYSTEM)
3165 u = manager_get_unit(m, SPECIAL_JOURNALD_SOCKET);
3166 if (u && SOCKET(u)->state != SOCKET_RUNNING) {
3167 log_close_journal();
3171 u = manager_get_unit(m, SPECIAL_JOURNALD_SERVICE);
3172 if (u && SERVICE(u)->state != SERVICE_RUNNING) {
3173 log_close_journal();
3177 /* Hmm, OK, so the socket is fully up and the service is up
3178 * too, then let's make use of the thing. */
3182 void manager_set_show_status(Manager *m, bool b) {
3185 if (m->running_as != MANAGER_SYSTEM)
3191 touch("/run/systemd/show-status");
3193 unlink("/run/systemd/show-status");
3196 bool manager_get_show_status(Manager *m) {
3199 if (m->running_as != MANAGER_SYSTEM)
3205 /* If Plymouth is running make sure we show the status, so
3206 * that there's something nice to see when people press Esc */
3208 return plymouth_running();
3211 static const char* const manager_running_as_table[_MANAGER_RUNNING_AS_MAX] = {
3212 [MANAGER_SYSTEM] = "system",
3213 [MANAGER_USER] = "user"
3216 DEFINE_STRING_TABLE_LOOKUP(manager_running_as, ManagerRunningAs);