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 /* If the kernel lacks netlink or audit support,
291 * don't worry about it. */
292 errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT)
293 log_error("Failed to connect to audit log: %m");
296 m->taint_usr = dir_is_empty("/usr") > 0;
306 static unsigned manager_dispatch_cleanup_queue(Manager *m) {
312 while ((meta = m->cleanup_queue)) {
313 assert(meta->in_cleanup_queue);
315 unit_free((Unit*) meta);
323 GC_OFFSET_IN_PATH, /* This one is on the path we were traveling */
324 GC_OFFSET_UNSURE, /* No clue */
325 GC_OFFSET_GOOD, /* We still need this unit */
326 GC_OFFSET_BAD, /* We don't need this unit anymore */
330 static void unit_gc_sweep(Unit *u, unsigned gc_marker) {
337 if (u->meta.gc_marker == gc_marker + GC_OFFSET_GOOD ||
338 u->meta.gc_marker == gc_marker + GC_OFFSET_BAD ||
339 u->meta.gc_marker == gc_marker + GC_OFFSET_IN_PATH)
342 if (u->meta.in_cleanup_queue)
345 if (unit_check_gc(u))
348 u->meta.gc_marker = gc_marker + GC_OFFSET_IN_PATH;
352 SET_FOREACH(other, u->meta.dependencies[UNIT_REFERENCED_BY], i) {
353 unit_gc_sweep(other, gc_marker);
355 if (other->meta.gc_marker == gc_marker + GC_OFFSET_GOOD)
358 if (other->meta.gc_marker != gc_marker + GC_OFFSET_BAD)
365 /* We were unable to find anything out about this entry, so
366 * let's investigate it later */
367 u->meta.gc_marker = gc_marker + GC_OFFSET_UNSURE;
368 unit_add_to_gc_queue(u);
372 /* We definitely know that this one is not useful anymore, so
373 * let's mark it for deletion */
374 u->meta.gc_marker = gc_marker + GC_OFFSET_BAD;
375 unit_add_to_cleanup_queue(u);
379 u->meta.gc_marker = gc_marker + GC_OFFSET_GOOD;
382 static unsigned manager_dispatch_gc_queue(Manager *m) {
389 if ((m->n_in_gc_queue < GC_QUEUE_ENTRIES_MAX) &&
390 (m->gc_queue_timestamp <= 0 ||
391 (m->gc_queue_timestamp + GC_QUEUE_USEC_MAX) > now(CLOCK_MONOTONIC)))
394 log_debug("Running GC...");
396 m->gc_marker += _GC_OFFSET_MAX;
397 if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX)
400 gc_marker = m->gc_marker;
402 while ((meta = m->gc_queue)) {
403 assert(meta->in_gc_queue);
405 unit_gc_sweep((Unit*) meta, gc_marker);
407 LIST_REMOVE(Meta, gc_queue, m->gc_queue, meta);
408 meta->in_gc_queue = false;
412 if (meta->gc_marker == gc_marker + GC_OFFSET_BAD ||
413 meta->gc_marker == gc_marker + GC_OFFSET_UNSURE) {
414 log_debug("Collecting %s", meta->id);
415 meta->gc_marker = gc_marker + GC_OFFSET_BAD;
416 unit_add_to_cleanup_queue((Unit*) meta);
420 m->n_in_gc_queue = 0;
421 m->gc_queue_timestamp = 0;
426 static void manager_clear_jobs_and_units(Manager *m) {
432 while ((j = hashmap_first(m->transaction_jobs)))
435 while ((u = hashmap_first(m->units)))
438 manager_dispatch_cleanup_queue(m);
440 assert(!m->load_queue);
441 assert(!m->run_queue);
442 assert(!m->dbus_unit_queue);
443 assert(!m->dbus_job_queue);
444 assert(!m->cleanup_queue);
445 assert(!m->gc_queue);
447 assert(hashmap_isempty(m->transaction_jobs));
448 assert(hashmap_isempty(m->jobs));
449 assert(hashmap_isempty(m->units));
452 void manager_free(Manager *m) {
457 manager_clear_jobs_and_units(m);
459 for (c = 0; c < _UNIT_TYPE_MAX; c++)
460 if (unit_vtable[c]->shutdown)
461 unit_vtable[c]->shutdown(m);
463 /* If we reexecute ourselves, we keep the root cgroup
465 manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE);
467 manager_undo_generators(m);
471 hashmap_free(m->units);
472 hashmap_free(m->jobs);
473 hashmap_free(m->transaction_jobs);
474 hashmap_free(m->watch_pids);
475 hashmap_free(m->watch_bus);
477 if (m->epoll_fd >= 0)
478 close_nointr_nofail(m->epoll_fd);
479 if (m->signal_watch.fd >= 0)
480 close_nointr_nofail(m->signal_watch.fd);
481 if (m->notify_watch.fd >= 0)
482 close_nointr_nofail(m->notify_watch.fd);
485 if (m->audit_fd >= 0)
486 audit_close(m->audit_fd);
489 free(m->notify_socket);
491 lookup_paths_free(&m->lookup_paths);
492 strv_free(m->environment);
494 strv_free(m->default_controllers);
496 hashmap_free(m->cgroup_bondings);
497 set_free_free(m->unit_path_cache);
502 int manager_enumerate(Manager *m) {
508 /* Let's ask every type to load all units from disk/kernel
509 * that it might know */
510 for (c = 0; c < _UNIT_TYPE_MAX; c++)
511 if (unit_vtable[c]->enumerate)
512 if ((q = unit_vtable[c]->enumerate(m)) < 0)
515 manager_dispatch_load_queue(m);
519 int manager_coldplug(Manager *m) {
527 /* Then, let's set up their initial state. */
528 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
534 if ((q = unit_coldplug(u)) < 0)
541 static void manager_build_unit_path_cache(Manager *m) {
548 set_free_free(m->unit_path_cache);
550 if (!(m->unit_path_cache = set_new(string_hash_func, string_compare_func))) {
551 log_error("Failed to allocate unit path cache.");
555 /* This simply builds a list of files we know exist, so that
556 * we don't always have to go to disk */
558 STRV_FOREACH(i, m->lookup_paths.unit_path) {
561 if (!(d = opendir(*i))) {
562 log_error("Failed to open directory: %m");
566 while ((de = readdir(d))) {
569 if (ignore_file(de->d_name))
572 p = join(streq(*i, "/") ? "" : *i, "/", de->d_name, NULL);
578 if ((r = set_put(m->unit_path_cache, p)) < 0) {
591 log_error("Failed to build unit path cache: %s", strerror(-r));
593 set_free_free(m->unit_path_cache);
594 m->unit_path_cache = NULL;
600 int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {
605 manager_run_generators(m);
607 manager_build_unit_path_cache(m);
609 /* If we will deserialize make sure that during enumeration
610 * this is already known, so we increase the counter here
615 /* First, enumerate what we can from all config files */
616 r = manager_enumerate(m);
618 /* Second, deserialize if there is something to deserialize */
620 if ((q = manager_deserialize(m, serialization, fds)) < 0)
623 /* Third, fire things up! */
624 if ((q = manager_coldplug(m)) < 0)
628 assert(m->n_reloading > 0);
635 static void transaction_delete_job(Manager *m, Job *j, bool delete_dependencies) {
639 /* Deletes one job from the transaction */
641 manager_transaction_unlink_job(m, j, delete_dependencies);
647 static void transaction_delete_unit(Manager *m, Unit *u) {
650 /* Deletes all jobs associated with a certain unit from the
653 while ((j = hashmap_get(m->transaction_jobs, u)))
654 transaction_delete_job(m, j, true);
657 static void transaction_clean_dependencies(Manager *m) {
663 /* Drops all dependencies of all installed jobs */
665 HASHMAP_FOREACH(j, m->jobs, i) {
666 while (j->subject_list)
667 job_dependency_free(j->subject_list);
668 while (j->object_list)
669 job_dependency_free(j->object_list);
672 assert(!m->transaction_anchor);
675 static void transaction_abort(Manager *m) {
680 while ((j = hashmap_first(m->transaction_jobs)))
682 transaction_delete_job(m, j, true);
686 assert(hashmap_isempty(m->transaction_jobs));
688 transaction_clean_dependencies(m);
691 static void transaction_find_jobs_that_matter_to_anchor(Manager *m, Job *j, unsigned generation) {
696 /* A recursive sweep through the graph that marks all units
697 * that matter to the anchor job, i.e. are directly or
698 * indirectly a dependency of the anchor job via paths that
699 * are fully marked as mattering. */
704 l = m->transaction_anchor;
706 LIST_FOREACH(subject, l, l) {
708 /* This link does not matter */
712 /* This unit has already been marked */
713 if (l->object->generation == generation)
716 l->object->matters_to_anchor = true;
717 l->object->generation = generation;
719 transaction_find_jobs_that_matter_to_anchor(m, l->object, generation);
723 static void transaction_merge_and_delete_job(Manager *m, Job *j, Job *other, JobType t) {
724 JobDependency *l, *last;
728 assert(j->unit == other->unit);
729 assert(!j->installed);
731 /* Merges 'other' into 'j' and then deletes j. */
734 j->state = JOB_WAITING;
735 j->override = j->override || other->override;
737 j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor;
739 /* Patch us in as new owner of the JobDependency objects */
741 LIST_FOREACH(subject, l, other->subject_list) {
742 assert(l->subject == other);
747 /* Merge both lists */
749 last->subject_next = j->subject_list;
751 j->subject_list->subject_prev = last;
752 j->subject_list = other->subject_list;
755 /* Patch us in as new owner of the JobDependency objects */
757 LIST_FOREACH(object, l, other->object_list) {
758 assert(l->object == other);
763 /* Merge both lists */
765 last->object_next = j->object_list;
767 j->object_list->object_prev = last;
768 j->object_list = other->object_list;
771 /* Kill the other job */
772 other->subject_list = NULL;
773 other->object_list = NULL;
774 transaction_delete_job(m, other, true);
776 static bool job_is_conflicted_by(Job *j) {
781 /* Returns true if this job is pulled in by a least one
782 * ConflictedBy dependency. */
784 LIST_FOREACH(object, l, j->object_list)
791 static int delete_one_unmergeable_job(Manager *m, Job *j) {
796 /* Tries to delete one item in the linked list
797 * j->transaction_next->transaction_next->... that conflicts
798 * with another one, in an attempt to make an inconsistent
799 * transaction work. */
801 /* We rely here on the fact that if a merged with b does not
802 * merge with c, either a or b merge with c neither */
803 LIST_FOREACH(transaction, j, j)
804 LIST_FOREACH(transaction, k, j->transaction_next) {
807 /* Is this one mergeable? Then skip it */
808 if (job_type_is_mergeable(j->type, k->type))
811 /* Ok, we found two that conflict, let's see if we can
812 * drop one of them */
813 if (!j->matters_to_anchor && !k->matters_to_anchor) {
815 /* Both jobs don't matter, so let's
816 * find the one that is smarter to
817 * remove. Let's think positive and
818 * rather remove stops then starts --
819 * except if something is being
820 * stopped because it is conflicted by
821 * another unit in which case we
822 * rather remove the start. */
824 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)));
825 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)));
827 if (j->type == JOB_STOP) {
829 if (job_is_conflicted_by(j))
834 } else if (k->type == JOB_STOP) {
836 if (job_is_conflicted_by(k))
843 } else if (!j->matters_to_anchor)
845 else if (!k->matters_to_anchor)
850 /* Ok, we can drop one, so let's do so. */
851 log_debug("Fixing conflicting jobs by deleting job %s/%s", d->unit->meta.id, job_type_to_string(d->type));
852 transaction_delete_job(m, d, true);
859 static int transaction_merge_jobs(Manager *m, DBusError *e) {
866 /* First step, check whether any of the jobs for one specific
867 * task conflict. If so, try to drop one of them. */
868 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
873 LIST_FOREACH(transaction, k, j->transaction_next) {
874 if (job_type_merge(&t, k->type) >= 0)
877 /* OK, we could not merge all jobs for this
878 * action. Let's see if we can get rid of one
881 if ((r = delete_one_unmergeable_job(m, j)) >= 0)
882 /* Ok, we managed to drop one, now
883 * let's ask our callers to call us
884 * again after garbage collecting */
887 /* We couldn't merge anything. Failure */
888 dbus_set_error(e, BUS_ERROR_TRANSACTION_JOBS_CONFLICTING, "Transaction contains conflicting jobs '%s' and '%s' for %s. Probably contradicting requirement dependencies configured.",
889 job_type_to_string(t), job_type_to_string(k->type), k->unit->meta.id);
894 /* Second step, merge the jobs. */
895 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
899 /* Merge all transactions */
900 LIST_FOREACH(transaction, k, j->transaction_next)
901 assert_se(job_type_merge(&t, k->type) == 0);
903 /* If an active job is mergeable, merge it too */
904 if (j->unit->meta.job)
905 job_type_merge(&t, j->unit->meta.job->type); /* Might fail. Which is OK */
907 while ((k = j->transaction_next)) {
909 transaction_merge_and_delete_job(m, k, j, t);
912 transaction_merge_and_delete_job(m, j, k, t);
915 if (j->unit->meta.job && !j->installed)
916 transaction_merge_and_delete_job(m, j, j->unit->meta.job, t);
918 assert(!j->transaction_next);
919 assert(!j->transaction_prev);
925 static void transaction_drop_redundant(Manager *m) {
930 /* Goes through the transaction and removes all jobs that are
939 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
940 bool changes_something = false;
943 LIST_FOREACH(transaction, k, j) {
945 if (!job_is_anchor(k) &&
946 (k->installed || job_type_is_redundant(k->type, unit_active_state(k->unit))) &&
947 (!k->unit->meta.job || !job_type_is_conflicting(k->type, k->unit->meta.job->type)))
950 changes_something = true;
954 if (changes_something)
957 /* log_debug("Found redundant job %s/%s, dropping.", j->unit->meta.id, job_type_to_string(j->type)); */
958 transaction_delete_job(m, j, false);
966 static bool unit_matters_to_anchor(Unit *u, Job *j) {
968 assert(!j->transaction_prev);
970 /* Checks whether at least one of the jobs for this unit
971 * matters to the anchor. */
973 LIST_FOREACH(transaction, j, j)
974 if (j->matters_to_anchor)
980 static int transaction_verify_order_one(Manager *m, Job *j, Job *from, unsigned generation, DBusError *e) {
987 assert(!j->transaction_prev);
989 /* Does a recursive sweep through the ordering graph, looking
990 * for a cycle. If we find cycle we try to break it. */
992 /* Have we seen this before? */
993 if (j->generation == generation) {
996 /* If the marker is NULL we have been here already and
997 * decided the job was loop-free from here. Hence
998 * shortcut things and return right-away. */
1002 /* So, the marker is not NULL and we already have been
1003 * here. We have a cycle. Let's try to break it. We go
1004 * backwards in our path and try to find a suitable
1005 * job to remove. We use the marker to find our way
1006 * back, since smart how we are we stored our way back
1008 log_warning("Found ordering cycle on %s/%s", j->unit->meta.id, job_type_to_string(j->type));
1011 for (k = from; k; k = ((k->generation == generation && k->marker != k) ? k->marker : NULL)) {
1013 log_info("Walked on cycle path to %s/%s", k->unit->meta.id, job_type_to_string(k->type));
1017 !unit_matters_to_anchor(k->unit, k)) {
1018 /* Ok, we can drop this one, so let's
1023 /* Check if this in fact was the beginning of
1031 log_warning("Breaking ordering cycle by deleting job %s/%s", delete->unit->meta.id, job_type_to_string(delete->type));
1032 transaction_delete_unit(m, delete->unit);
1036 log_error("Unable to break cycle");
1038 dbus_set_error(e, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC, "Transaction order is cyclic. See system logs for details.");
1042 /* Make the marker point to where we come from, so that we can
1043 * find our way backwards if we want to break a cycle. We use
1044 * a special marker for the beginning: we point to
1046 j->marker = from ? from : j;
1047 j->generation = generation;
1049 /* We assume that the the dependencies are bidirectional, and
1050 * hence can ignore UNIT_AFTER */
1051 SET_FOREACH(u, j->unit->meta.dependencies[UNIT_BEFORE], i) {
1054 /* Is there a job for this unit? */
1055 if (!(o = hashmap_get(m->transaction_jobs, u)))
1057 /* Ok, there is no job for this in the
1058 * transaction, but maybe there is already one
1060 if (!(o = u->meta.job))
1063 if ((r = transaction_verify_order_one(m, o, j, generation, e)) < 0)
1067 /* Ok, let's backtrack, and remember that this entry is not on
1068 * our path anymore. */
1074 static int transaction_verify_order(Manager *m, unsigned *generation, DBusError *e) {
1083 /* Check if the ordering graph is cyclic. If it is, try to fix
1084 * that up by dropping one of the jobs. */
1086 g = (*generation)++;
1088 HASHMAP_FOREACH(j, m->transaction_jobs, i)
1089 if ((r = transaction_verify_order_one(m, j, NULL, g, e)) < 0)
1095 static void transaction_collect_garbage(Manager *m) {
1100 /* Drop jobs that are not required by any other job */
1108 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1109 if (j->object_list) {
1110 /* log_debug("Keeping job %s/%s because of %s/%s", */
1111 /* j->unit->meta.id, job_type_to_string(j->type), */
1112 /* j->object_list->subject ? j->object_list->subject->unit->meta.id : "root", */
1113 /* j->object_list->subject ? job_type_to_string(j->object_list->subject->type) : "root"); */
1117 /* log_debug("Garbage collecting job %s/%s", j->unit->meta.id, job_type_to_string(j->type)); */
1118 transaction_delete_job(m, j, true);
1126 static int transaction_is_destructive(Manager *m, DBusError *e) {
1132 /* Checks whether applying this transaction means that
1133 * existing jobs would be replaced */
1135 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1138 assert(!j->transaction_prev);
1139 assert(!j->transaction_next);
1141 if (j->unit->meta.job &&
1142 j->unit->meta.job != j &&
1143 !job_type_is_superset(j->type, j->unit->meta.job->type)) {
1145 dbus_set_error(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE, "Transaction is destructive.");
1153 static void transaction_minimize_impact(Manager *m) {
1157 /* Drops all unnecessary jobs that reverse already active jobs
1158 * or that stop a running service. */
1166 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1167 LIST_FOREACH(transaction, j, j) {
1168 bool stops_running_service, changes_existing_job;
1170 /* If it matters, we shouldn't drop it */
1171 if (j->matters_to_anchor)
1174 /* Would this stop a running service?
1175 * Would this change an existing job?
1176 * If so, let's drop this entry */
1178 stops_running_service =
1179 j->type == JOB_STOP && UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j->unit));
1181 changes_existing_job =
1182 j->unit->meta.job &&
1183 job_type_is_conflicting(j->type, j->unit->meta.job->type);
1185 if (!stops_running_service && !changes_existing_job)
1188 if (stops_running_service)
1189 log_debug("%s/%s would stop a running service.", j->unit->meta.id, job_type_to_string(j->type));
1191 if (changes_existing_job)
1192 log_debug("%s/%s would change existing job.", j->unit->meta.id, job_type_to_string(j->type));
1194 /* Ok, let's get rid of this */
1195 log_debug("Deleting %s/%s to minimize impact.", j->unit->meta.id, job_type_to_string(j->type));
1197 transaction_delete_job(m, j, true);
1209 static int transaction_apply(Manager *m, JobMode mode) {
1214 /* Moves the transaction jobs to the set of active jobs */
1216 if (mode == JOB_ISOLATE) {
1218 /* When isolating first kill all installed jobs which
1219 * aren't part of the new transaction */
1221 HASHMAP_FOREACH(j, m->jobs, i) {
1222 assert(j->installed);
1224 if (hashmap_get(m->transaction_jobs, j->unit))
1227 /* 'j' itself is safe to remove, but if other jobs
1228 are invalidated recursively, our iterator may become
1229 invalid and we need to start over. */
1230 if (job_finish_and_invalidate(j, JOB_CANCELED) > 0)
1235 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1237 assert(!j->transaction_prev);
1238 assert(!j->transaction_next);
1243 if ((r = hashmap_put(m->jobs, UINT32_TO_PTR(j->id), j)) < 0)
1247 while ((j = hashmap_steal_first(m->transaction_jobs))) {
1249 /* log_debug("Skipping already installed job %s/%s as %u", j->unit->meta.id, job_type_to_string(j->type), (unsigned) j->id); */
1253 if (j->unit->meta.job)
1254 job_free(j->unit->meta.job);
1256 j->unit->meta.job = j;
1257 j->installed = true;
1258 m->n_installed_jobs ++;
1260 /* We're fully installed. Now let's free data we don't
1263 assert(!j->transaction_next);
1264 assert(!j->transaction_prev);
1266 job_add_to_run_queue(j);
1267 job_add_to_dbus_queue(j);
1270 log_debug("Installed new job %s/%s as %u", j->unit->meta.id, job_type_to_string(j->type), (unsigned) j->id);
1273 /* As last step, kill all remaining job dependencies. */
1274 transaction_clean_dependencies(m);
1280 HASHMAP_FOREACH(j, m->transaction_jobs, i) {
1284 hashmap_remove(m->jobs, UINT32_TO_PTR(j->id));
1290 static int transaction_activate(Manager *m, JobMode mode, DBusError *e) {
1292 unsigned generation = 1;
1296 /* This applies the changes recorded in transaction_jobs to
1297 * the actual list of jobs, if possible. */
1299 /* First step: figure out which jobs matter */
1300 transaction_find_jobs_that_matter_to_anchor(m, NULL, generation++);
1302 /* Second step: Try not to stop any running services if
1303 * we don't have to. Don't try to reverse running
1304 * jobs if we don't have to. */
1305 if (mode == JOB_FAIL)
1306 transaction_minimize_impact(m);
1308 /* Third step: Drop redundant jobs */
1309 transaction_drop_redundant(m);
1312 /* Fourth step: Let's remove unneeded jobs that might
1314 if (mode != JOB_ISOLATE)
1315 transaction_collect_garbage(m);
1317 /* Fifth step: verify order makes sense and correct
1318 * cycles if necessary and possible */
1319 if ((r = transaction_verify_order(m, &generation, e)) >= 0)
1323 log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error(e, r));
1327 /* Let's see if the resulting transaction ordering
1328 * graph is still cyclic... */
1332 /* Sixth step: let's drop unmergeable entries if
1333 * necessary and possible, merge entries we can
1335 if ((r = transaction_merge_jobs(m, e)) >= 0)
1339 log_warning("Requested transaction contains unmergeable jobs: %s", bus_error(e, r));
1343 /* Seventh step: an entry got dropped, let's garbage
1344 * collect its dependencies. */
1345 if (mode != JOB_ISOLATE)
1346 transaction_collect_garbage(m);
1348 /* Let's see if the resulting transaction still has
1349 * unmergeable entries ... */
1352 /* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */
1353 transaction_drop_redundant(m);
1355 /* Ninth step: check whether we can actually apply this */
1356 if (mode == JOB_FAIL)
1357 if ((r = transaction_is_destructive(m, e)) < 0) {
1358 log_notice("Requested transaction contradicts existing jobs: %s", bus_error(e, r));
1362 /* Tenth step: apply changes */
1363 if ((r = transaction_apply(m, mode)) < 0) {
1364 log_warning("Failed to apply transaction: %s", strerror(-r));
1368 assert(hashmap_isempty(m->transaction_jobs));
1369 assert(!m->transaction_anchor);
1374 transaction_abort(m);
1378 static Job* transaction_add_one_job(Manager *m, JobType type, Unit *unit, bool override, bool *is_new) {
1384 /* Looks for an existing prospective job and returns that. If
1385 * it doesn't exist it is created and added to the prospective
1388 f = hashmap_get(m->transaction_jobs, unit);
1390 LIST_FOREACH(transaction, j, f) {
1391 assert(j->unit == unit);
1393 if (j->type == type) {
1400 if (unit->meta.job && unit->meta.job->type == type)
1402 else if (!(j = job_new(m, type, unit)))
1407 j->matters_to_anchor = false;
1408 j->override = override;
1410 LIST_PREPEND(Job, transaction, f, j);
1412 if (hashmap_replace(m->transaction_jobs, unit, f) < 0) {
1420 /* log_debug("Added job %s/%s to transaction.", unit->meta.id, job_type_to_string(type)); */
1425 void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies) {
1429 if (j->transaction_prev)
1430 j->transaction_prev->transaction_next = j->transaction_next;
1431 else if (j->transaction_next)
1432 hashmap_replace(m->transaction_jobs, j->unit, j->transaction_next);
1434 hashmap_remove_value(m->transaction_jobs, j->unit, j);
1436 if (j->transaction_next)
1437 j->transaction_next->transaction_prev = j->transaction_prev;
1439 j->transaction_prev = j->transaction_next = NULL;
1441 while (j->subject_list)
1442 job_dependency_free(j->subject_list);
1444 while (j->object_list) {
1445 Job *other = j->object_list->matters ? j->object_list->subject : NULL;
1447 job_dependency_free(j->object_list);
1449 if (other && delete_dependencies) {
1450 log_debug("Deleting job %s/%s as dependency of job %s/%s",
1451 other->unit->meta.id, job_type_to_string(other->type),
1452 j->unit->meta.id, job_type_to_string(j->type));
1453 transaction_delete_job(m, other, delete_dependencies);
1458 static int transaction_add_job_and_dependencies(
1466 bool ignore_requirements,
1477 assert(type < _JOB_TYPE_MAX);
1480 /* log_debug("Pulling in %s/%s from %s/%s", */
1481 /* unit->meta.id, job_type_to_string(type), */
1482 /* by ? by->unit->meta.id : "NA", */
1483 /* by ? job_type_to_string(by->type) : "NA"); */
1485 if (unit->meta.load_state != UNIT_LOADED &&
1486 unit->meta.load_state != UNIT_ERROR &&
1487 unit->meta.load_state != UNIT_MASKED) {
1488 dbus_set_error(e, BUS_ERROR_LOAD_FAILED, "Unit %s is not loaded properly.", unit->meta.id);
1492 if (type != JOB_STOP && unit->meta.load_state == UNIT_ERROR) {
1493 dbus_set_error(e, BUS_ERROR_LOAD_FAILED,
1494 "Unit %s failed to load: %s. "
1495 "See system logs and 'systemctl status %s' for details.",
1497 strerror(-unit->meta.load_error),
1502 if (type != JOB_STOP && unit->meta.load_state == UNIT_MASKED) {
1503 dbus_set_error(e, BUS_ERROR_MASKED, "Unit %s is masked.", unit->meta.id);
1507 if (!unit_job_is_applicable(unit, type)) {
1508 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);
1512 /* First add the job. */
1513 if (!(ret = transaction_add_one_job(m, type, unit, override, &is_new)))
1516 ret->ignore_order = ret->ignore_order || ignore_order;
1518 /* Then, add a link to the job. */
1519 if (!job_dependency_new(by, ret, matters, conflicts))
1522 if (is_new && !ignore_requirements) {
1525 /* If we are following some other unit, make sure we
1526 * add all dependencies of everybody following. */
1527 if (unit_following_set(ret->unit, &following) > 0) {
1528 SET_FOREACH(dep, following, i)
1529 if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, false, override, false, false, ignore_order, e, NULL)) < 0) {
1530 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, bus_error(e, r));
1536 set_free(following);
1539 /* Finally, recursively add in all dependencies. */
1540 if (type == JOB_START || type == JOB_RELOAD_OR_START) {
1541 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRES], i)
1542 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1550 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_BIND_TO], i)
1551 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1560 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
1561 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, !override, override, 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_WANTS], i)
1569 if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, false, false, false, false, ignore_order, e, NULL)) < 0) {
1570 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, bus_error(e, r));
1576 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUISITE], i)
1577 if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1586 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
1587 if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, !override, override, false, false, ignore_order, e, NULL)) < 0) {
1588 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, bus_error(e, r));
1594 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_CONFLICTS], i)
1595 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, true, override, true, false, ignore_order, e, NULL)) < 0) {
1604 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_CONFLICTED_BY], i)
1605 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, false, override, false, false, ignore_order, e, NULL)) < 0) {
1606 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, bus_error(e, r));
1612 } else if (type == JOB_STOP || type == JOB_RESTART || type == JOB_TRY_RESTART) {
1614 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRED_BY], i)
1615 if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1624 SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_BOUND_BY], i)
1625 if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {
1635 /* JOB_VERIFY_STARTED, JOB_RELOAD require no dependency handling */
1647 static int transaction_add_isolate_jobs(Manager *m) {
1655 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
1657 /* ignore aliases */
1658 if (u->meta.id != k)
1661 if (u->meta.ignore_on_isolate)
1664 /* No need to stop inactive jobs */
1665 if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) && !u->meta.job)
1668 /* Is there already something listed for this? */
1669 if (hashmap_get(m->transaction_jobs, u))
1672 if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, u, NULL, true, false, false, false, false, NULL, NULL)) < 0)
1673 log_warning("Cannot add isolate job for unit %s, ignoring: %s", u->meta.id, strerror(-r));
1679 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, DBusError *e, Job **_ret) {
1684 assert(type < _JOB_TYPE_MAX);
1686 assert(mode < _JOB_MODE_MAX);
1688 if (mode == JOB_ISOLATE && type != JOB_START) {
1689 dbus_set_error(e, BUS_ERROR_INVALID_JOB_MODE, "Isolate is only valid for start.");
1693 if (mode == JOB_ISOLATE && !unit->meta.allow_isolate) {
1694 dbus_set_error(e, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated.");
1698 log_debug("Trying to enqueue job %s/%s/%s", unit->meta.id, job_type_to_string(type), job_mode_to_string(mode));
1700 if ((r = transaction_add_job_and_dependencies(m, type, unit, NULL, true, override, false,
1701 mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS,
1702 mode == JOB_IGNORE_DEPENDENCIES, e, &ret)) < 0) {
1703 transaction_abort(m);
1707 if (mode == JOB_ISOLATE)
1708 if ((r = transaction_add_isolate_jobs(m)) < 0) {
1709 transaction_abort(m);
1713 if ((r = transaction_activate(m, mode, e)) < 0)
1716 log_debug("Enqueued job %s/%s as %u", unit->meta.id, job_type_to_string(type), (unsigned) ret->id);
1724 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, DBusError *e, Job **_ret) {
1729 assert(type < _JOB_TYPE_MAX);
1731 assert(mode < _JOB_MODE_MAX);
1733 if ((r = manager_load_unit(m, name, NULL, NULL, &unit)) < 0)
1736 return manager_add_job(m, type, unit, mode, override, e, _ret);
1739 Job *manager_get_job(Manager *m, uint32_t id) {
1742 return hashmap_get(m->jobs, UINT32_TO_PTR(id));
1745 Unit *manager_get_unit(Manager *m, const char *name) {
1749 return hashmap_get(m->units, name);
1752 unsigned manager_dispatch_load_queue(Manager *m) {
1758 /* Make sure we are not run recursively */
1759 if (m->dispatching_load_queue)
1762 m->dispatching_load_queue = true;
1764 /* Dispatches the load queue. Takes a unit from the queue and
1765 * tries to load its data until the queue is empty */
1767 while ((meta = m->load_queue)) {
1768 assert(meta->in_load_queue);
1770 unit_load((Unit*) meta);
1774 m->dispatching_load_queue = false;
1778 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret) {
1783 assert(name || path);
1785 /* This will prepare the unit for loading, but not actually
1786 * load anything from disk. */
1788 if (path && !is_path(path)) {
1789 dbus_set_error(e, BUS_ERROR_INVALID_PATH, "Path %s is not absolute.", path);
1794 name = file_name_from_path(path);
1796 if (!unit_name_is_valid(name, false)) {
1797 dbus_set_error(e, BUS_ERROR_INVALID_NAME, "Unit name %s is not valid.", name);
1801 if ((ret = manager_get_unit(m, name))) {
1806 if (!(ret = unit_new(m)))
1810 if (!(ret->meta.fragment_path = strdup(path))) {
1815 if ((r = unit_add_name(ret, name)) < 0) {
1820 unit_add_to_load_queue(ret);
1821 unit_add_to_dbus_queue(ret);
1822 unit_add_to_gc_queue(ret);
1830 int manager_load_unit(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret) {
1835 /* This will load the service information files, but not actually
1836 * start any services or anything. */
1838 if ((r = manager_load_unit_prepare(m, name, path, e, _ret)) != 0)
1841 manager_dispatch_load_queue(m);
1844 *_ret = unit_follow_merge(*_ret);
1849 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix) {
1856 HASHMAP_FOREACH(j, s->jobs, i)
1857 job_dump(j, f, prefix);
1860 void manager_dump_units(Manager *s, FILE *f, const char *prefix) {
1868 HASHMAP_FOREACH_KEY(u, t, s->units, i)
1869 if (u->meta.id == t)
1870 unit_dump(u, f, prefix);
1873 void manager_clear_jobs(Manager *m) {
1878 transaction_abort(m);
1880 while ((j = hashmap_first(m->jobs)))
1881 job_finish_and_invalidate(j, JOB_CANCELED);
1884 unsigned manager_dispatch_run_queue(Manager *m) {
1888 if (m->dispatching_run_queue)
1891 m->dispatching_run_queue = true;
1893 while ((j = m->run_queue)) {
1894 assert(j->installed);
1895 assert(j->in_run_queue);
1897 job_run_and_invalidate(j);
1901 m->dispatching_run_queue = false;
1905 unsigned manager_dispatch_dbus_queue(Manager *m) {
1912 if (m->dispatching_dbus_queue)
1915 m->dispatching_dbus_queue = true;
1917 while ((meta = m->dbus_unit_queue)) {
1918 assert(meta->in_dbus_queue);
1920 bus_unit_send_change_signal((Unit*) meta);
1924 while ((j = m->dbus_job_queue)) {
1925 assert(j->in_dbus_queue);
1927 bus_job_send_change_signal(j);
1931 m->dispatching_dbus_queue = false;
1935 static int manager_process_notify_fd(Manager *m) {
1942 struct msghdr msghdr;
1944 struct ucred *ucred;
1946 struct cmsghdr cmsghdr;
1947 uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
1953 iovec.iov_base = buf;
1954 iovec.iov_len = sizeof(buf)-1;
1958 msghdr.msg_iov = &iovec;
1959 msghdr.msg_iovlen = 1;
1960 msghdr.msg_control = &control;
1961 msghdr.msg_controllen = sizeof(control);
1963 if ((n = recvmsg(m->notify_watch.fd, &msghdr, MSG_DONTWAIT)) <= 0) {
1967 if (errno == EAGAIN || errno == EINTR)
1973 if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) ||
1974 control.cmsghdr.cmsg_level != SOL_SOCKET ||
1975 control.cmsghdr.cmsg_type != SCM_CREDENTIALS ||
1976 control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) {
1977 log_warning("Received notify message without credentials. Ignoring.");
1981 ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);
1983 if (!(u = hashmap_get(m->watch_pids, LONG_TO_PTR(ucred->pid))))
1984 if (!(u = cgroup_unit_by_pid(m, ucred->pid))) {
1985 log_warning("Cannot find unit for notify message of PID %lu.", (unsigned long) ucred->pid);
1989 assert((size_t) n < sizeof(buf));
1991 if (!(tags = strv_split(buf, "\n\r")))
1994 log_debug("Got notification message for unit %s", u->meta.id);
1996 if (UNIT_VTABLE(u)->notify_message)
1997 UNIT_VTABLE(u)->notify_message(u, ucred->pid, tags);
2005 static int manager_dispatch_sigchld(Manager *m) {
2015 /* First we call waitd() for a PID and do not reap the
2016 * zombie. That way we can still access /proc/$PID for
2017 * it while it is a zombie. */
2018 if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) {
2020 if (errno == ECHILD)
2032 if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) {
2035 get_process_name(si.si_pid, &name);
2036 log_debug("Got SIGCHLD for process %lu (%s)", (unsigned long) si.si_pid, strna(name));
2040 /* Let's flush any message the dying child might still
2041 * have queued for us. This ensures that the process
2042 * still exists in /proc so that we can figure out
2043 * which cgroup and hence unit it belongs to. */
2044 if ((r = manager_process_notify_fd(m)) < 0)
2047 /* And now figure out the unit this belongs to */
2048 if (!(u = hashmap_get(m->watch_pids, LONG_TO_PTR(si.si_pid))))
2049 u = cgroup_unit_by_pid(m, si.si_pid);
2051 /* And now, we actually reap the zombie. */
2052 if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {
2059 if (si.si_code != CLD_EXITED && si.si_code != CLD_KILLED && si.si_code != CLD_DUMPED)
2062 log_debug("Child %lu died (code=%s, status=%i/%s)",
2063 (long unsigned) si.si_pid,
2064 sigchld_code_to_string(si.si_code),
2066 strna(si.si_code == CLD_EXITED
2067 ? exit_status_to_string(si.si_status, EXIT_STATUS_FULL)
2068 : signal_to_string(si.si_status)));
2073 log_debug("Child %lu belongs to %s", (long unsigned) si.si_pid, u->meta.id);
2075 hashmap_remove(m->watch_pids, LONG_TO_PTR(si.si_pid));
2076 UNIT_VTABLE(u)->sigchld_event(u, si.si_pid, si.si_code, si.si_status);
2082 static int manager_start_target(Manager *m, const char *name, JobMode mode) {
2086 dbus_error_init(&error);
2088 log_debug("Activating special unit %s", name);
2090 if ((r = manager_add_job_by_name(m, JOB_START, name, mode, true, &error, NULL)) < 0)
2091 log_error("Failed to enqueue %s job: %s", name, bus_error(&error, r));
2093 dbus_error_free(&error);
2098 static int manager_process_signal_fd(Manager *m) {
2100 struct signalfd_siginfo sfsi;
2101 bool sigchld = false;
2106 if ((n = read(m->signal_watch.fd, &sfsi, sizeof(sfsi))) != sizeof(sfsi)) {
2111 if (errno == EINTR || errno == EAGAIN)
2117 if (sfsi.ssi_pid > 0) {
2120 get_process_name(sfsi.ssi_pid, &p);
2122 log_debug("Received SIG%s from PID %lu (%s).",
2123 signal_to_string(sfsi.ssi_signo),
2124 (unsigned long) sfsi.ssi_pid, strna(p));
2127 log_debug("Received SIG%s.", signal_to_string(sfsi.ssi_signo));
2129 switch (sfsi.ssi_signo) {
2136 if (m->running_as == MANAGER_SYSTEM) {
2137 /* This is for compatibility with the
2138 * original sysvinit */
2139 m->exit_code = MANAGER_REEXECUTE;
2146 if (m->running_as == MANAGER_SYSTEM) {
2147 manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE);
2151 /* Run the exit target if there is one, if not, just exit. */
2152 if (manager_start_target(m, SPECIAL_EXIT_TARGET, JOB_REPLACE) < 0) {
2153 m->exit_code = MANAGER_EXIT;
2160 if (m->running_as == MANAGER_SYSTEM)
2161 manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE);
2163 /* This is a nop on non-init */
2167 if (m->running_as == MANAGER_SYSTEM)
2168 manager_start_target(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE);
2170 /* This is a nop on non-init */
2176 u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);
2178 if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) {
2179 log_info("Trying to reconnect to bus...");
2183 if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) {
2184 log_info("Loading D-Bus service...");
2185 manager_start_target(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE);
2196 if (!(f = open_memstream(&dump, &size))) {
2197 log_warning("Failed to allocate memory stream.");
2201 manager_dump_units(m, f, "\t");
2202 manager_dump_jobs(m, f, "\t");
2207 log_warning("Failed to write status stream");
2212 log_dump(LOG_INFO, dump);
2219 m->exit_code = MANAGER_RELOAD;
2224 /* Starting SIGRTMIN+0 */
2225 static const char * const target_table[] = {
2226 [0] = SPECIAL_DEFAULT_TARGET,
2227 [1] = SPECIAL_RESCUE_TARGET,
2228 [2] = SPECIAL_EMERGENCY_TARGET,
2229 [3] = SPECIAL_HALT_TARGET,
2230 [4] = SPECIAL_POWEROFF_TARGET,
2231 [5] = SPECIAL_REBOOT_TARGET,
2232 [6] = SPECIAL_KEXEC_TARGET
2235 /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
2236 static const ManagerExitCode code_table[] = {
2238 [1] = MANAGER_POWEROFF,
2239 [2] = MANAGER_REBOOT,
2243 if ((int) sfsi.ssi_signo >= SIGRTMIN+0 &&
2244 (int) sfsi.ssi_signo < SIGRTMIN+(int) ELEMENTSOF(target_table)) {
2245 int idx = (int) sfsi.ssi_signo - SIGRTMIN;
2246 manager_start_target(m, target_table[idx],
2247 (idx == 1 || idx == 2) ? JOB_ISOLATE : JOB_REPLACE);
2251 if ((int) sfsi.ssi_signo >= SIGRTMIN+13 &&
2252 (int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(code_table)) {
2253 m->exit_code = code_table[sfsi.ssi_signo - SIGRTMIN - 13];
2257 switch (sfsi.ssi_signo - SIGRTMIN) {
2260 log_debug("Enabling showing of status.");
2261 manager_set_show_status(m, true);
2265 log_debug("Disabling showing of status.");
2266 manager_set_show_status(m, false);
2270 log_set_max_level(LOG_DEBUG);
2271 log_notice("Setting log level to debug.");
2275 log_set_max_level(LOG_INFO);
2276 log_notice("Setting log level to info.");
2280 log_set_target(LOG_TARGET_CONSOLE);
2281 log_notice("Setting log target to console.");
2285 log_set_target(LOG_TARGET_KMSG);
2286 log_notice("Setting log target to kmsg.");
2290 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
2291 log_notice("Setting log target to syslog-or-kmsg.");
2295 log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo));
2302 return manager_dispatch_sigchld(m);
2307 static int process_event(Manager *m, struct epoll_event *ev) {
2314 assert_se(w = ev->data.ptr);
2316 if (w->type == WATCH_INVALID)
2323 /* An incoming signal? */
2324 if (ev->events != EPOLLIN)
2327 if ((r = manager_process_signal_fd(m)) < 0)
2334 /* An incoming daemon notification event? */
2335 if (ev->events != EPOLLIN)
2338 if ((r = manager_process_notify_fd(m)) < 0)
2345 /* Some fd event, to be dispatched to the units */
2346 UNIT_VTABLE(w->data.unit)->fd_event(w->data.unit, w->fd, ev->events, w);
2349 case WATCH_UNIT_TIMER:
2350 case WATCH_JOB_TIMER: {
2354 /* Some timer event, to be dispatched to the units */
2355 if ((k = read(w->fd, &v, sizeof(v))) != sizeof(v)) {
2357 if (k < 0 && (errno == EINTR || errno == EAGAIN))
2360 return k < 0 ? -errno : -EIO;
2363 if (w->type == WATCH_UNIT_TIMER)
2364 UNIT_VTABLE(w->data.unit)->timer_event(w->data.unit, v, w);
2366 job_timer_event(w->data.job, v, w);
2371 /* Some mount table change, intended for the mount subsystem */
2372 mount_fd_event(m, ev->events);
2376 /* Some swap table change, intended for the swap subsystem */
2377 swap_fd_event(m, ev->events);
2381 /* Some notification from udev, intended for the device subsystem */
2382 device_fd_event(m, ev->events);
2385 case WATCH_DBUS_WATCH:
2386 bus_watch_event(m, w, ev->events);
2389 case WATCH_DBUS_TIMEOUT:
2390 bus_timeout_event(m, w, ev->events);
2394 log_error("event type=%i", w->type);
2395 assert_not_reached("Unknown epoll event type.");
2401 int manager_loop(Manager *m) {
2404 RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000);
2407 m->exit_code = MANAGER_RUNNING;
2409 /* Release the path cache */
2410 set_free_free(m->unit_path_cache);
2411 m->unit_path_cache = NULL;
2413 manager_check_finished(m);
2415 /* There might still be some zombies hanging around from
2416 * before we were exec()'ed. Leat's reap them */
2417 if ((r = manager_dispatch_sigchld(m)) < 0)
2420 while (m->exit_code == MANAGER_RUNNING) {
2421 struct epoll_event event;
2424 if (!ratelimit_test(&rl)) {
2425 /* Yay, something is going seriously wrong, pause a little */
2426 log_warning("Looping too fast. Throttling execution a little.");
2430 if (manager_dispatch_load_queue(m) > 0)
2433 if (manager_dispatch_run_queue(m) > 0)
2436 if (bus_dispatch(m) > 0)
2439 if (manager_dispatch_cleanup_queue(m) > 0)
2442 if (manager_dispatch_gc_queue(m) > 0)
2445 if (manager_dispatch_dbus_queue(m) > 0)
2448 if (swap_dispatch_reload(m) > 0)
2451 if ((n = epoll_wait(m->epoll_fd, &event, 1, -1)) < 0) {
2461 if ((r = process_event(m, &event)) < 0)
2465 return m->exit_code;
2468 int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u) {
2476 if (!startswith(s, "/org/freedesktop/systemd1/unit/"))
2479 if (!(n = bus_path_unescape(s+31)))
2482 u = manager_get_unit(m, n);
2493 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) {
2502 if (!startswith(s, "/org/freedesktop/systemd1/job/"))
2505 if ((r = safe_atou(s + 30, &id)) < 0)
2508 if (!(j = manager_get_job(m, id)))
2516 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success) {
2521 if (m->audit_fd < 0)
2524 /* Don't generate audit events if the service was already
2525 * started and we're just deserializing */
2526 if (m->n_reloading > 0)
2529 if (m->running_as != MANAGER_SYSTEM)
2532 if (u->meta.type != UNIT_SERVICE)
2535 if (!(p = unit_name_to_prefix_and_instance(u->meta.id))) {
2536 log_error("Failed to allocate unit name for audit message: %s", strerror(ENOMEM));
2540 if (audit_log_user_comm_message(m->audit_fd, type, "", p, NULL, NULL, NULL, success) < 0) {
2541 log_warning("Failed to send audit message: %m");
2543 if (errno == EPERM) {
2544 /* We aren't allowed to send audit messages?
2545 * Then let's not retry again, to avoid
2546 * spamming the user with the same and same
2547 * messages over and over. */
2549 audit_close(m->audit_fd);
2559 void manager_send_unit_plymouth(Manager *m, Unit *u) {
2561 union sockaddr_union sa;
2563 char *message = NULL;
2565 /* Don't generate plymouth events if the service was already
2566 * started and we're just deserializing */
2567 if (m->n_reloading > 0)
2570 if (m->running_as != MANAGER_SYSTEM)
2573 if (u->meta.type != UNIT_SERVICE &&
2574 u->meta.type != UNIT_MOUNT &&
2575 u->meta.type != UNIT_SWAP)
2578 /* We set SOCK_NONBLOCK here so that we rather drop the
2579 * message then wait for plymouth */
2580 if ((fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
2581 log_error("socket() failed: %m");
2586 sa.sa.sa_family = AF_UNIX;
2587 strncpy(sa.un.sun_path+1, "/org/freedesktop/plymouthd", sizeof(sa.un.sun_path)-1);
2588 if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {
2590 if (errno != EPIPE &&
2593 errno != ECONNREFUSED &&
2594 errno != ECONNRESET &&
2595 errno != ECONNABORTED)
2596 log_error("connect() failed: %m");
2601 if (asprintf(&message, "U\002%c%s%n", (int) (strlen(u->meta.id) + 1), u->meta.id, &n) < 0) {
2602 log_error("Out of memory");
2607 if (write(fd, message, n + 1) != n + 1) {
2609 if (errno != EPIPE &&
2612 errno != ECONNREFUSED &&
2613 errno != ECONNRESET &&
2614 errno != ECONNABORTED)
2615 log_error("Failed to write Plymouth message: %m");
2622 close_nointr_nofail(fd);
2627 void manager_dispatch_bus_name_owner_changed(
2630 const char* old_owner,
2631 const char *new_owner) {
2638 if (!(u = hashmap_get(m->watch_bus, name)))
2641 UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner);
2644 void manager_dispatch_bus_query_pid_done(
2655 if (!(u = hashmap_get(m->watch_bus, name)))
2658 UNIT_VTABLE(u)->bus_query_pid_done(u, name, pid);
2661 int manager_open_serialization(Manager *m, FILE **_f) {
2669 if (m->running_as == MANAGER_SYSTEM)
2670 asprintf(&path, "/run/systemd/dump-%lu-XXXXXX", (unsigned long) getpid());
2672 asprintf(&path, "/tmp/systemd-dump-%lu-XXXXXX", (unsigned long) getpid());
2677 saved_umask = umask(0077);
2678 fd = mkostemp(path, O_RDWR|O_CLOEXEC);
2688 log_debug("Serializing state to %s", path);
2691 if (!(f = fdopen(fd, "w+")))
2699 int manager_serialize(Manager *m, FILE *f, FDSet *fds) {
2711 fprintf(f, "current-job-id=%i\n", m->current_job_id);
2712 fprintf(f, "taint-usr=%s\n", yes_no(m->taint_usr));
2714 dual_timestamp_serialize(f, "initrd-timestamp", &m->initrd_timestamp);
2715 dual_timestamp_serialize(f, "startup-timestamp", &m->startup_timestamp);
2716 dual_timestamp_serialize(f, "finish-timestamp", &m->finish_timestamp);
2720 HASHMAP_FOREACH_KEY(u, t, m->units, i) {
2721 if (u->meta.id != t)
2724 if (!unit_can_serialize(u))
2728 fputs(u->meta.id, f);
2731 if ((r = unit_serialize(u, f, fds)) < 0) {
2737 assert(m->n_reloading > 0);
2743 r = bus_fdset_add_all(m, fds);
2750 int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
2756 log_debug("Deserializing state...");
2761 char line[LINE_MAX], *l;
2763 if (!fgets(line, sizeof(line), f)) {
2778 if (startswith(l, "current-job-id=")) {
2781 if (safe_atou32(l+15, &id) < 0)
2782 log_debug("Failed to parse current job id value %s", l+15);
2784 m->current_job_id = MAX(m->current_job_id, id);
2785 } else if (startswith(l, "taint-usr=")) {
2788 if ((b = parse_boolean(l+10)) < 0)
2789 log_debug("Failed to parse taint /usr flag %s", l+10);
2791 m->taint_usr = m->taint_usr || b;
2792 } else if (startswith(l, "initrd-timestamp="))
2793 dual_timestamp_deserialize(l+17, &m->initrd_timestamp);
2794 else if (startswith(l, "startup-timestamp="))
2795 dual_timestamp_deserialize(l+18, &m->startup_timestamp);
2796 else if (startswith(l, "finish-timestamp="))
2797 dual_timestamp_deserialize(l+17, &m->finish_timestamp);
2799 log_debug("Unknown serialization item '%s'", l);
2804 char name[UNIT_NAME_MAX+2];
2807 if (!fgets(name, sizeof(name), f)) {
2818 if ((r = manager_load_unit(m, strstrip(name), NULL, NULL, &u)) < 0)
2821 if ((r = unit_deserialize(u, f, fds)) < 0)
2831 assert(m->n_reloading > 0);
2837 int manager_reload(Manager *m) {
2844 if ((r = manager_open_serialization(m, &f)) < 0)
2849 if (!(fds = fdset_new())) {
2855 if ((r = manager_serialize(m, f, fds)) < 0) {
2860 if (fseeko(f, 0, SEEK_SET) < 0) {
2866 /* From here on there is no way back. */
2867 manager_clear_jobs_and_units(m);
2868 manager_undo_generators(m);
2870 /* Find new unit paths */
2871 lookup_paths_free(&m->lookup_paths);
2872 if ((q = lookup_paths_init(&m->lookup_paths, m->running_as, true)) < 0)
2875 manager_run_generators(m);
2877 manager_build_unit_path_cache(m);
2879 /* First, enumerate what we can from all config files */
2880 if ((q = manager_enumerate(m)) < 0)
2883 /* Second, deserialize our stored data */
2884 if ((q = manager_deserialize(m, f, fds)) < 0)
2890 /* Third, fire things up! */
2891 if ((q = manager_coldplug(m)) < 0)
2894 assert(m->n_reloading > 0);
2907 bool manager_is_booting_or_shutting_down(Manager *m) {
2912 /* Is the initial job still around? */
2913 if (manager_get_job(m, 1))
2916 /* Is there a job for the shutdown target? */
2917 u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
2919 return !!u->meta.job;
2924 void manager_reset_failed(Manager *m) {
2930 HASHMAP_FOREACH(u, m->units, i)
2931 unit_reset_failed(u);
2934 bool manager_unit_pending_inactive(Manager *m, const char *name) {
2940 /* Returns true if the unit is inactive or going down */
2941 if (!(u = manager_get_unit(m, name)))
2944 return unit_pending_inactive(u);
2947 void manager_check_finished(Manager *m) {
2948 char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX];
2949 usec_t kernel_usec = 0, initrd_usec = 0, userspace_usec = 0, total_usec = 0;
2953 if (dual_timestamp_is_set(&m->finish_timestamp))
2956 if (hashmap_size(m->jobs) > 0)
2959 dual_timestamp_get(&m->finish_timestamp);
2961 if (m->running_as == MANAGER_SYSTEM && detect_container(NULL) <= 0) {
2963 userspace_usec = m->finish_timestamp.monotonic - m->startup_timestamp.monotonic;
2964 total_usec = m->finish_timestamp.monotonic;
2966 if (dual_timestamp_is_set(&m->initrd_timestamp)) {
2968 kernel_usec = m->initrd_timestamp.monotonic;
2969 initrd_usec = m->startup_timestamp.monotonic - m->initrd_timestamp.monotonic;
2971 log_info("Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.",
2972 format_timespan(kernel, sizeof(kernel), kernel_usec),
2973 format_timespan(initrd, sizeof(initrd), initrd_usec),
2974 format_timespan(userspace, sizeof(userspace), userspace_usec),
2975 format_timespan(sum, sizeof(sum), total_usec));
2977 kernel_usec = m->startup_timestamp.monotonic;
2980 log_info("Startup finished in %s (kernel) + %s (userspace) = %s.",
2981 format_timespan(kernel, sizeof(kernel), kernel_usec),
2982 format_timespan(userspace, sizeof(userspace), userspace_usec),
2983 format_timespan(sum, sizeof(sum), total_usec));
2986 userspace_usec = initrd_usec = kernel_usec = 0;
2987 total_usec = m->finish_timestamp.monotonic - m->startup_timestamp.monotonic;
2989 log_debug("Startup finished in %s.",
2990 format_timespan(sum, sizeof(sum), total_usec));
2993 bus_broadcast_finished(m, kernel_usec, initrd_usec, userspace_usec, total_usec);
2996 "READY=1\nSTATUS=Startup finished in %s.",
2997 format_timespan(sum, sizeof(sum), total_usec));
3000 void manager_run_generators(Manager *m) {
3002 const char *generator_path;
3003 const char *argv[3];
3008 generator_path = m->running_as == MANAGER_SYSTEM ? SYSTEM_GENERATOR_PATH : USER_GENERATOR_PATH;
3009 if (!(d = opendir(generator_path))) {
3011 if (errno == ENOENT)
3014 log_error("Failed to enumerate generator directory: %m");
3018 if (!m->generator_unit_path) {
3020 char user_path[] = "/tmp/systemd-generator-XXXXXX";
3022 if (m->running_as == MANAGER_SYSTEM && getpid() == 1) {
3023 p = "/run/systemd/generator";
3025 if (mkdir_p(p, 0755) < 0) {
3026 log_error("Failed to create generator directory: %m");
3031 if (!(p = mkdtemp(user_path))) {
3032 log_error("Failed to create generator directory: %m");
3037 if (!(m->generator_unit_path = strdup(p))) {
3038 log_error("Failed to allocate generator unit path.");
3043 argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */
3044 argv[1] = m->generator_unit_path;
3048 execute_directory(generator_path, d, (char**) argv);
3051 if (rmdir(m->generator_unit_path) >= 0) {
3052 /* Uh? we were able to remove this dir? I guess that
3053 * means the directory was empty, hence let's shortcut
3056 free(m->generator_unit_path);
3057 m->generator_unit_path = NULL;
3061 if (!strv_find(m->lookup_paths.unit_path, m->generator_unit_path)) {
3064 if (!(l = strv_append(m->lookup_paths.unit_path, m->generator_unit_path))) {
3065 log_error("Failed to add generator directory to unit search path: %m");
3069 strv_free(m->lookup_paths.unit_path);
3070 m->lookup_paths.unit_path = l;
3072 log_debug("Added generator unit path %s to search path.", m->generator_unit_path);
3080 void manager_undo_generators(Manager *m) {
3083 if (!m->generator_unit_path)
3086 strv_remove(m->lookup_paths.unit_path, m->generator_unit_path);
3087 rm_rf(m->generator_unit_path, false, true, false);
3089 free(m->generator_unit_path);
3090 m->generator_unit_path = NULL;
3093 int manager_set_default_controllers(Manager *m, char **controllers) {
3098 if (!(l = strv_copy(controllers)))
3101 strv_free(m->default_controllers);
3102 m->default_controllers = l;
3107 void manager_recheck_syslog(Manager *m) {
3112 if (m->running_as != MANAGER_SYSTEM)
3115 if ((u = manager_get_unit(m, SPECIAL_SYSLOG_SOCKET))) {
3118 state = SOCKET(u)->state;
3120 if (state != SOCKET_DEAD &&
3121 state != SOCKET_FAILED &&
3122 state != SOCKET_RUNNING) {
3124 /* Hmm, the socket is not set up, or is still
3125 * listening, let's better not try to use
3126 * it. Note that we have no problem if the
3127 * socket is completely down, since there
3128 * might be a foreign /dev/log socket around
3129 * and we want to make use of that.
3137 if ((u = manager_get_unit(m, SPECIAL_SYSLOG_TARGET)))
3138 if (TARGET(u)->state != TARGET_ACTIVE) {
3143 /* Hmm, OK, so the socket is either fully up, or fully down,
3144 * and the target is up, then let's make use of the socket */
3148 void manager_set_show_status(Manager *m, bool b) {
3151 if (m->running_as != MANAGER_SYSTEM)
3157 touch("/run/systemd/show-status");
3159 unlink("/run/systemd/show-status");
3162 bool manager_get_show_status(Manager *m) {
3165 if (m->running_as != MANAGER_SYSTEM)
3171 /* If Plymouth is running make sure we show the status, so
3172 * that there's something nice to see when people press Esc */
3174 return plymouth_running();
3177 static const char* const manager_running_as_table[_MANAGER_RUNNING_AS_MAX] = {
3178 [MANAGER_SYSTEM] = "system",
3179 [MANAGER_USER] = "user"
3182 DEFINE_STRING_TABLE_LOOKUP(manager_running_as, ManagerRunningAs);