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"
62 /* As soon as 16 units are in our GC queue, make sure to run a gc sweep */
63 #define GC_QUEUE_ENTRIES_MAX 16
65 /* As soon as 5s passed since a unit was added to our GC queue, make sure to run a gc sweep */
66 #define GC_QUEUE_USEC_MAX (10*USEC_PER_SEC)
68 /* Where clients shall send notification messages to */
69 #define NOTIFY_SOCKET_SYSTEM "/dev/.run/systemd/notify"
70 #define NOTIFY_SOCKET_USER "@/org/freedesktop/systemd1/notify"
72 static int manager_setup_notify(Manager
*m
) {
75 struct sockaddr_un un
;
77 struct epoll_event ev
;
82 m
->notify_watch
.type
= WATCH_NOTIFY
;
83 if ((m
->notify_watch
.fd
= socket(AF_UNIX
, SOCK_DGRAM
|SOCK_CLOEXEC
|SOCK_NONBLOCK
, 0)) < 0) {
84 log_error("Failed to allocate notification socket: %m");
89 sa
.sa
.sa_family
= AF_UNIX
;
92 snprintf(sa
.un
.sun_path
, sizeof(sa
.un
.sun_path
), NOTIFY_SOCKET_USER
"/%llu", random_ull());
94 unlink(NOTIFY_SOCKET_SYSTEM
);
95 strncpy(sa
.un
.sun_path
, NOTIFY_SOCKET_SYSTEM
, sizeof(sa
.un
.sun_path
));
98 if (sa
.un
.sun_path
[0] == '@')
99 sa
.un
.sun_path
[0] = 0;
101 if (bind(m
->notify_watch
.fd
, &sa
.sa
, offsetof(struct sockaddr_un
, sun_path
) + 1 + strlen(sa
.un
.sun_path
+1)) < 0) {
102 log_error("bind() failed: %m");
106 if (setsockopt(m
->notify_watch
.fd
, SOL_SOCKET
, SO_PASSCRED
, &one
, sizeof(one
)) < 0) {
107 log_error("SO_PASSCRED failed: %m");
113 ev
.data
.ptr
= &m
->notify_watch
;
115 if (epoll_ctl(m
->epoll_fd
, EPOLL_CTL_ADD
, m
->notify_watch
.fd
, &ev
) < 0)
118 if (sa
.un
.sun_path
[0] == 0)
119 sa
.un
.sun_path
[0] = '@';
121 if (!(m
->notify_socket
= strdup(sa
.un
.sun_path
)))
124 log_debug("Using notification socket %s", m
->notify_socket
);
129 static int enable_special_signals(Manager
*m
) {
134 /* Enable that we get SIGINT on control-alt-del */
135 if (reboot(RB_DISABLE_CAD
) < 0)
136 log_warning("Failed to enable ctrl-alt-del handling: %m");
138 if ((fd
= open_terminal("/dev/tty0", O_RDWR
|O_NOCTTY
)) < 0)
139 log_warning("Failed to open /dev/tty0: %m");
141 /* Enable that we get SIGWINCH on kbrequest */
142 if (ioctl(fd
, KDSIGACCEPT
, SIGWINCH
) < 0)
143 log_warning("Failed to enable kbrequest handling: %s", strerror(errno
));
145 close_nointr_nofail(fd
);
151 static int manager_setup_signals(Manager
*m
) {
153 struct epoll_event ev
;
158 /* We are not interested in SIGSTOP and friends. */
160 sa
.sa_handler
= SIG_DFL
;
161 sa
.sa_flags
= SA_NOCLDSTOP
|SA_RESTART
;
162 assert_se(sigaction(SIGCHLD
, &sa
, NULL
) == 0);
164 assert_se(sigemptyset(&mask
) == 0);
166 sigset_add_many(&mask
,
167 SIGCHLD
, /* Child died */
168 SIGTERM
, /* Reexecute daemon */
169 SIGHUP
, /* Reload configuration */
170 SIGUSR1
, /* systemd/upstart: reconnect to D-Bus */
171 SIGUSR2
, /* systemd: dump status */
172 SIGINT
, /* Kernel sends us this on control-alt-del */
173 SIGWINCH
, /* Kernel sends us this on kbrequest (alt-arrowup) */
174 SIGPWR
, /* Some kernel drivers and upsd send us this on power failure */
175 SIGRTMIN
+0, /* systemd: start default.target */
176 SIGRTMIN
+1, /* systemd: isolate rescue.target */
177 SIGRTMIN
+2, /* systemd: isolate emergency.target */
178 SIGRTMIN
+3, /* systemd: start halt.target */
179 SIGRTMIN
+4, /* systemd: start poweroff.target */
180 SIGRTMIN
+5, /* systemd: start reboot.target */
181 SIGRTMIN
+6, /* systemd: start kexec.target */
182 SIGRTMIN
+13, /* systemd: Immediate halt */
183 SIGRTMIN
+14, /* systemd: Immediate poweroff */
184 SIGRTMIN
+15, /* systemd: Immediate reboot */
185 SIGRTMIN
+16, /* systemd: Immediate kexec */
186 SIGRTMIN
+20, /* systemd: enable status messages */
187 SIGRTMIN
+21, /* systemd: disable status messages */
189 assert_se(sigprocmask(SIG_SETMASK
, &mask
, NULL
) == 0);
191 m
->signal_watch
.type
= WATCH_SIGNAL
;
192 if ((m
->signal_watch
.fd
= signalfd(-1, &mask
, SFD_NONBLOCK
|SFD_CLOEXEC
)) < 0)
197 ev
.data
.ptr
= &m
->signal_watch
;
199 if (epoll_ctl(m
->epoll_fd
, EPOLL_CTL_ADD
, m
->signal_watch
.fd
, &ev
) < 0)
202 if (m
->running_as
== MANAGER_SYSTEM
)
203 return enable_special_signals(m
);
208 int manager_new(ManagerRunningAs running_as
, Manager
**_m
) {
213 assert(running_as
>= 0);
214 assert(running_as
< _MANAGER_RUNNING_AS_MAX
);
216 if (!(m
= new0(Manager
, 1)))
219 dual_timestamp_get(&m
->startup_timestamp
);
221 m
->running_as
= running_as
;
222 m
->name_data_slot
= m
->subscribed_data_slot
= -1;
223 m
->exit_code
= _MANAGER_EXIT_CODE_INVALID
;
224 m
->pin_cgroupfs_fd
= -1;
230 m
->signal_watch
.fd
= m
->mount_watch
.fd
= m
->udev_watch
.fd
= m
->epoll_fd
= m
->dev_autofs_fd
= m
->swap_watch
.fd
= -1;
231 m
->current_job_id
= 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
233 if (!(m
->environment
= strv_copy(environ
)))
236 if (!(m
->default_controllers
= strv_new("cpu", NULL
)))
239 if (!(m
->units
= hashmap_new(string_hash_func
, string_compare_func
)))
242 if (!(m
->jobs
= hashmap_new(trivial_hash_func
, trivial_compare_func
)))
245 if (!(m
->transaction_jobs
= hashmap_new(trivial_hash_func
, trivial_compare_func
)))
248 if (!(m
->watch_pids
= hashmap_new(trivial_hash_func
, trivial_compare_func
)))
251 if (!(m
->cgroup_bondings
= hashmap_new(string_hash_func
, string_compare_func
)))
254 if (!(m
->watch_bus
= hashmap_new(string_hash_func
, string_compare_func
)))
257 if ((m
->epoll_fd
= epoll_create1(EPOLL_CLOEXEC
)) < 0)
260 if ((r
= lookup_paths_init(&m
->lookup_paths
, m
->running_as
)) < 0)
263 if ((r
= manager_setup_signals(m
)) < 0)
266 if ((r
= manager_setup_cgroup(m
)) < 0)
269 if ((r
= manager_setup_notify(m
)) < 0)
272 /* Try to connect to the busses, if possible. */
273 if ((r
= bus_init(m
, running_as
!= MANAGER_SYSTEM
)) < 0)
277 if ((m
->audit_fd
= audit_open()) < 0)
278 log_error("Failed to connect to audit log: %m");
289 static unsigned manager_dispatch_cleanup_queue(Manager
*m
) {
295 while ((meta
= m
->cleanup_queue
)) {
296 assert(meta
->in_cleanup_queue
);
298 unit_free((Unit
*) meta
);
306 GC_OFFSET_IN_PATH
, /* This one is on the path we were traveling */
307 GC_OFFSET_UNSURE
, /* No clue */
308 GC_OFFSET_GOOD
, /* We still need this unit */
309 GC_OFFSET_BAD
, /* We don't need this unit anymore */
313 static void unit_gc_sweep(Unit
*u
, unsigned gc_marker
) {
320 if (u
->meta
.gc_marker
== gc_marker
+ GC_OFFSET_GOOD
||
321 u
->meta
.gc_marker
== gc_marker
+ GC_OFFSET_BAD
||
322 u
->meta
.gc_marker
== gc_marker
+ GC_OFFSET_IN_PATH
)
325 if (u
->meta
.in_cleanup_queue
)
328 if (unit_check_gc(u
))
331 u
->meta
.gc_marker
= gc_marker
+ GC_OFFSET_IN_PATH
;
335 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REFERENCED_BY
], i
) {
336 unit_gc_sweep(other
, gc_marker
);
338 if (other
->meta
.gc_marker
== gc_marker
+ GC_OFFSET_GOOD
)
341 if (other
->meta
.gc_marker
!= gc_marker
+ GC_OFFSET_BAD
)
348 /* We were unable to find anything out about this entry, so
349 * let's investigate it later */
350 u
->meta
.gc_marker
= gc_marker
+ GC_OFFSET_UNSURE
;
351 unit_add_to_gc_queue(u
);
355 /* We definitely know that this one is not useful anymore, so
356 * let's mark it for deletion */
357 u
->meta
.gc_marker
= gc_marker
+ GC_OFFSET_BAD
;
358 unit_add_to_cleanup_queue(u
);
362 u
->meta
.gc_marker
= gc_marker
+ GC_OFFSET_GOOD
;
365 static unsigned manager_dispatch_gc_queue(Manager
*m
) {
372 if ((m
->n_in_gc_queue
< GC_QUEUE_ENTRIES_MAX
) &&
373 (m
->gc_queue_timestamp
<= 0 ||
374 (m
->gc_queue_timestamp
+ GC_QUEUE_USEC_MAX
) > now(CLOCK_MONOTONIC
)))
377 log_debug("Running GC...");
379 m
->gc_marker
+= _GC_OFFSET_MAX
;
380 if (m
->gc_marker
+ _GC_OFFSET_MAX
<= _GC_OFFSET_MAX
)
383 gc_marker
= m
->gc_marker
;
385 while ((meta
= m
->gc_queue
)) {
386 assert(meta
->in_gc_queue
);
388 unit_gc_sweep((Unit
*) meta
, gc_marker
);
390 LIST_REMOVE(Meta
, gc_queue
, m
->gc_queue
, meta
);
391 meta
->in_gc_queue
= false;
395 if (meta
->gc_marker
== gc_marker
+ GC_OFFSET_BAD
||
396 meta
->gc_marker
== gc_marker
+ GC_OFFSET_UNSURE
) {
397 log_debug("Collecting %s", meta
->id
);
398 meta
->gc_marker
= gc_marker
+ GC_OFFSET_BAD
;
399 unit_add_to_cleanup_queue((Unit
*) meta
);
403 m
->n_in_gc_queue
= 0;
404 m
->gc_queue_timestamp
= 0;
409 static void manager_clear_jobs_and_units(Manager
*m
) {
415 while ((j
= hashmap_first(m
->transaction_jobs
)))
418 while ((u
= hashmap_first(m
->units
)))
421 manager_dispatch_cleanup_queue(m
);
423 assert(!m
->load_queue
);
424 assert(!m
->run_queue
);
425 assert(!m
->dbus_unit_queue
);
426 assert(!m
->dbus_job_queue
);
427 assert(!m
->cleanup_queue
);
428 assert(!m
->gc_queue
);
430 assert(hashmap_isempty(m
->transaction_jobs
));
431 assert(hashmap_isempty(m
->jobs
));
432 assert(hashmap_isempty(m
->units
));
435 void manager_free(Manager
*m
) {
440 manager_clear_jobs_and_units(m
);
442 for (c
= 0; c
< _UNIT_TYPE_MAX
; c
++)
443 if (unit_vtable
[c
]->shutdown
)
444 unit_vtable
[c
]->shutdown(m
);
446 /* If we reexecute ourselves, we keep the root cgroup
448 manager_shutdown_cgroup(m
, m
->exit_code
!= MANAGER_REEXECUTE
);
450 manager_undo_generators(m
);
454 hashmap_free(m
->units
);
455 hashmap_free(m
->jobs
);
456 hashmap_free(m
->transaction_jobs
);
457 hashmap_free(m
->watch_pids
);
458 hashmap_free(m
->watch_bus
);
460 if (m
->epoll_fd
>= 0)
461 close_nointr_nofail(m
->epoll_fd
);
462 if (m
->signal_watch
.fd
>= 0)
463 close_nointr_nofail(m
->signal_watch
.fd
);
464 if (m
->notify_watch
.fd
>= 0)
465 close_nointr_nofail(m
->notify_watch
.fd
);
468 if (m
->audit_fd
>= 0)
469 audit_close(m
->audit_fd
);
472 free(m
->notify_socket
);
474 lookup_paths_free(&m
->lookup_paths
);
475 strv_free(m
->environment
);
477 strv_free(m
->default_controllers
);
479 hashmap_free(m
->cgroup_bondings
);
480 set_free_free(m
->unit_path_cache
);
485 int manager_enumerate(Manager
*m
) {
491 /* Let's ask every type to load all units from disk/kernel
492 * that it might know */
493 for (c
= 0; c
< _UNIT_TYPE_MAX
; c
++)
494 if (unit_vtable
[c
]->enumerate
)
495 if ((q
= unit_vtable
[c
]->enumerate(m
)) < 0)
498 manager_dispatch_load_queue(m
);
502 int manager_coldplug(Manager
*m
) {
510 /* Then, let's set up their initial state. */
511 HASHMAP_FOREACH_KEY(u
, k
, m
->units
, i
) {
517 if ((q
= unit_coldplug(u
)) < 0)
524 static void manager_build_unit_path_cache(Manager
*m
) {
531 set_free_free(m
->unit_path_cache
);
533 if (!(m
->unit_path_cache
= set_new(string_hash_func
, string_compare_func
))) {
534 log_error("Failed to allocate unit path cache.");
538 /* This simply builds a list of files we know exist, so that
539 * we don't always have to go to disk */
541 STRV_FOREACH(i
, m
->lookup_paths
.unit_path
) {
544 if (!(d
= opendir(*i
))) {
545 log_error("Failed to open directory: %m");
549 while ((de
= readdir(d
))) {
552 if (ignore_file(de
->d_name
))
555 if (asprintf(&p
, "%s/%s", streq(*i
, "/") ? "" : *i
, de
->d_name
) < 0) {
560 if ((r
= set_put(m
->unit_path_cache
, p
)) < 0) {
573 log_error("Failed to build unit path cache: %s", strerror(-r
));
575 set_free_free(m
->unit_path_cache
);
576 m
->unit_path_cache
= NULL
;
582 int manager_startup(Manager
*m
, FILE *serialization
, FDSet
*fds
) {
587 manager_run_generators(m
);
589 manager_build_unit_path_cache(m
);
591 /* If we will deserialize make sure that during enumeration
592 * this is already known, so we increase the counter here
595 m
->n_deserializing
++;
597 /* First, enumerate what we can from all config files */
598 r
= manager_enumerate(m
);
600 /* Second, deserialize if there is something to deserialize */
602 if ((q
= manager_deserialize(m
, serialization
, fds
)) < 0)
605 /* Third, fire things up! */
606 if ((q
= manager_coldplug(m
)) < 0)
610 assert(m
->n_deserializing
> 0);
611 m
->n_deserializing
--;
617 static void transaction_delete_job(Manager
*m
, Job
*j
, bool delete_dependencies
) {
621 /* Deletes one job from the transaction */
623 manager_transaction_unlink_job(m
, j
, delete_dependencies
);
629 static void transaction_delete_unit(Manager
*m
, Unit
*u
) {
632 /* Deletes all jobs associated with a certain unit from the
635 while ((j
= hashmap_get(m
->transaction_jobs
, u
)))
636 transaction_delete_job(m
, j
, true);
639 static void transaction_clean_dependencies(Manager
*m
) {
645 /* Drops all dependencies of all installed jobs */
647 HASHMAP_FOREACH(j
, m
->jobs
, i
) {
648 while (j
->subject_list
)
649 job_dependency_free(j
->subject_list
);
650 while (j
->object_list
)
651 job_dependency_free(j
->object_list
);
654 assert(!m
->transaction_anchor
);
657 static void transaction_abort(Manager
*m
) {
662 while ((j
= hashmap_first(m
->transaction_jobs
)))
664 transaction_delete_job(m
, j
, true);
668 assert(hashmap_isempty(m
->transaction_jobs
));
670 transaction_clean_dependencies(m
);
673 static void transaction_find_jobs_that_matter_to_anchor(Manager
*m
, Job
*j
, unsigned generation
) {
678 /* A recursive sweep through the graph that marks all units
679 * that matter to the anchor job, i.e. are directly or
680 * indirectly a dependency of the anchor job via paths that
681 * are fully marked as mattering. */
686 l
= m
->transaction_anchor
;
688 LIST_FOREACH(subject
, l
, l
) {
690 /* This link does not matter */
694 /* This unit has already been marked */
695 if (l
->object
->generation
== generation
)
698 l
->object
->matters_to_anchor
= true;
699 l
->object
->generation
= generation
;
701 transaction_find_jobs_that_matter_to_anchor(m
, l
->object
, generation
);
705 static void transaction_merge_and_delete_job(Manager
*m
, Job
*j
, Job
*other
, JobType t
) {
706 JobDependency
*l
, *last
;
710 assert(j
->unit
== other
->unit
);
711 assert(!j
->installed
);
713 /* Merges 'other' into 'j' and then deletes j. */
716 j
->state
= JOB_WAITING
;
717 j
->override
= j
->override
|| other
->override
;
719 j
->matters_to_anchor
= j
->matters_to_anchor
|| other
->matters_to_anchor
;
721 /* Patch us in as new owner of the JobDependency objects */
723 LIST_FOREACH(subject
, l
, other
->subject_list
) {
724 assert(l
->subject
== other
);
729 /* Merge both lists */
731 last
->subject_next
= j
->subject_list
;
733 j
->subject_list
->subject_prev
= last
;
734 j
->subject_list
= other
->subject_list
;
737 /* Patch us in as new owner of the JobDependency objects */
739 LIST_FOREACH(object
, l
, other
->object_list
) {
740 assert(l
->object
== other
);
745 /* Merge both lists */
747 last
->object_next
= j
->object_list
;
749 j
->object_list
->object_prev
= last
;
750 j
->object_list
= other
->object_list
;
753 /* Kill the other job */
754 other
->subject_list
= NULL
;
755 other
->object_list
= NULL
;
756 transaction_delete_job(m
, other
, true);
758 static bool job_is_conflicted_by(Job
*j
) {
763 /* Returns true if this job is pulled in by a least one
764 * ConflictedBy dependency. */
766 LIST_FOREACH(object
, l
, j
->object_list
)
773 static int delete_one_unmergeable_job(Manager
*m
, Job
*j
) {
778 /* Tries to delete one item in the linked list
779 * j->transaction_next->transaction_next->... that conflicts
780 * with another one, in an attempt to make an inconsistent
781 * transaction work. */
783 /* We rely here on the fact that if a merged with b does not
784 * merge with c, either a or b merge with c neither */
785 LIST_FOREACH(transaction
, j
, j
)
786 LIST_FOREACH(transaction
, k
, j
->transaction_next
) {
789 /* Is this one mergeable? Then skip it */
790 if (job_type_is_mergeable(j
->type
, k
->type
))
793 /* Ok, we found two that conflict, let's see if we can
794 * drop one of them */
795 if (!j
->matters_to_anchor
&& !k
->matters_to_anchor
) {
797 /* Both jobs don't matter, so let's
798 * find the one that is smarter to
799 * remove. Let's think positive and
800 * rather remove stops then starts --
801 * except if something is being
802 * stopped because it is conflicted by
803 * another unit in which case we
804 * rather remove the start. */
806 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
)));
807 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
)));
809 if (j
->type
== JOB_STOP
) {
811 if (job_is_conflicted_by(j
))
816 } else if (k
->type
== JOB_STOP
) {
818 if (job_is_conflicted_by(k
))
825 } else if (!j
->matters_to_anchor
)
827 else if (!k
->matters_to_anchor
)
832 /* Ok, we can drop one, so let's do so. */
833 log_debug("Fixing conflicting jobs by deleting job %s/%s", d
->unit
->meta
.id
, job_type_to_string(d
->type
));
834 transaction_delete_job(m
, d
, true);
841 static int transaction_merge_jobs(Manager
*m
, DBusError
*e
) {
848 /* First step, check whether any of the jobs for one specific
849 * task conflict. If so, try to drop one of them. */
850 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
855 LIST_FOREACH(transaction
, k
, j
->transaction_next
) {
856 if (job_type_merge(&t
, k
->type
) >= 0)
859 /* OK, we could not merge all jobs for this
860 * action. Let's see if we can get rid of one
863 if ((r
= delete_one_unmergeable_job(m
, j
)) >= 0)
864 /* Ok, we managed to drop one, now
865 * let's ask our callers to call us
866 * again after garbage collecting */
869 /* We couldn't merge anything. Failure */
870 dbus_set_error(e
, BUS_ERROR_TRANSACTION_JOBS_CONFLICTING
, "Transaction contains conflicting jobs '%s' and '%s' for %s. Probably contradicting requirement dependencies configured.",
871 job_type_to_string(t
), job_type_to_string(k
->type
), k
->unit
->meta
.id
);
876 /* Second step, merge the jobs. */
877 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
881 /* Merge all transactions */
882 LIST_FOREACH(transaction
, k
, j
->transaction_next
)
883 assert_se(job_type_merge(&t
, k
->type
) == 0);
885 /* If an active job is mergeable, merge it too */
886 if (j
->unit
->meta
.job
)
887 job_type_merge(&t
, j
->unit
->meta
.job
->type
); /* Might fail. Which is OK */
889 while ((k
= j
->transaction_next
)) {
891 transaction_merge_and_delete_job(m
, k
, j
, t
);
894 transaction_merge_and_delete_job(m
, j
, k
, t
);
897 assert(!j
->transaction_next
);
898 assert(!j
->transaction_prev
);
904 static void transaction_drop_redundant(Manager
*m
) {
909 /* Goes through the transaction and removes all jobs that are
918 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
919 bool changes_something
= false;
922 LIST_FOREACH(transaction
, k
, j
) {
924 if (!job_is_anchor(k
) &&
925 (k
->installed
|| job_type_is_redundant(k
->type
, unit_active_state(k
->unit
))) &&
926 (!k
->unit
->meta
.job
|| !job_type_is_conflicting(k
->type
, k
->unit
->meta
.job
->type
)))
929 changes_something
= true;
933 if (changes_something
)
936 /* log_debug("Found redundant job %s/%s, dropping.", j->unit->meta.id, job_type_to_string(j->type)); */
937 transaction_delete_job(m
, j
, false);
945 static bool unit_matters_to_anchor(Unit
*u
, Job
*j
) {
947 assert(!j
->transaction_prev
);
949 /* Checks whether at least one of the jobs for this unit
950 * matters to the anchor. */
952 LIST_FOREACH(transaction
, j
, j
)
953 if (j
->matters_to_anchor
)
959 static int transaction_verify_order_one(Manager
*m
, Job
*j
, Job
*from
, unsigned generation
, DBusError
*e
) {
966 assert(!j
->transaction_prev
);
968 /* Does a recursive sweep through the ordering graph, looking
969 * for a cycle. If we find cycle we try to break it. */
971 /* Have we seen this before? */
972 if (j
->generation
== generation
) {
975 /* If the marker is NULL we have been here already and
976 * decided the job was loop-free from here. Hence
977 * shortcut things and return right-away. */
981 /* So, the marker is not NULL and we already have been
982 * here. We have a cycle. Let's try to break it. We go
983 * backwards in our path and try to find a suitable
984 * job to remove. We use the marker to find our way
985 * back, since smart how we are we stored our way back
987 log_warning("Found ordering cycle on %s/%s", j
->unit
->meta
.id
, job_type_to_string(j
->type
));
990 for (k
= from
; k
; k
= ((k
->generation
== generation
&& k
->marker
!= k
) ? k
->marker
: NULL
)) {
992 log_info("Walked on cycle path to %s/%s", k
->unit
->meta
.id
, job_type_to_string(k
->type
));
996 !unit_matters_to_anchor(k
->unit
, k
)) {
997 /* Ok, we can drop this one, so let's
1002 /* Check if this in fact was the beginning of
1010 log_warning("Breaking ordering cycle by deleting job %s/%s", delete->unit
->meta
.id
, job_type_to_string(delete->type
));
1011 transaction_delete_unit(m
, delete->unit
);
1015 log_error("Unable to break cycle");
1017 dbus_set_error(e
, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC
, "Transaction order is cyclic. See system logs for details.");
1021 /* Make the marker point to where we come from, so that we can
1022 * find our way backwards if we want to break a cycle. We use
1023 * a special marker for the beginning: we point to
1025 j
->marker
= from
? from
: j
;
1026 j
->generation
= generation
;
1028 /* We assume that the the dependencies are bidirectional, and
1029 * hence can ignore UNIT_AFTER */
1030 SET_FOREACH(u
, j
->unit
->meta
.dependencies
[UNIT_BEFORE
], i
) {
1033 /* Is there a job for this unit? */
1034 if (!(o
= hashmap_get(m
->transaction_jobs
, u
)))
1036 /* Ok, there is no job for this in the
1037 * transaction, but maybe there is already one
1039 if (!(o
= u
->meta
.job
))
1042 if ((r
= transaction_verify_order_one(m
, o
, j
, generation
, e
)) < 0)
1046 /* Ok, let's backtrack, and remember that this entry is not on
1047 * our path anymore. */
1053 static int transaction_verify_order(Manager
*m
, unsigned *generation
, DBusError
*e
) {
1062 /* Check if the ordering graph is cyclic. If it is, try to fix
1063 * that up by dropping one of the jobs. */
1065 g
= (*generation
)++;
1067 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
)
1068 if ((r
= transaction_verify_order_one(m
, j
, NULL
, g
, e
)) < 0)
1074 static void transaction_collect_garbage(Manager
*m
) {
1079 /* Drop jobs that are not required by any other job */
1087 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
1088 if (j
->object_list
) {
1089 /* log_debug("Keeping job %s/%s because of %s/%s", */
1090 /* j->unit->meta.id, job_type_to_string(j->type), */
1091 /* j->object_list->subject ? j->object_list->subject->unit->meta.id : "root", */
1092 /* j->object_list->subject ? job_type_to_string(j->object_list->subject->type) : "root"); */
1096 /* log_debug("Garbage collecting job %s/%s", j->unit->meta.id, job_type_to_string(j->type)); */
1097 transaction_delete_job(m
, j
, true);
1105 static int transaction_is_destructive(Manager
*m
, DBusError
*e
) {
1111 /* Checks whether applying this transaction means that
1112 * existing jobs would be replaced */
1114 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
1117 assert(!j
->transaction_prev
);
1118 assert(!j
->transaction_next
);
1120 if (j
->unit
->meta
.job
&&
1121 j
->unit
->meta
.job
!= j
&&
1122 !job_type_is_superset(j
->type
, j
->unit
->meta
.job
->type
)) {
1124 dbus_set_error(e
, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE
, "Transaction is destructive.");
1132 static void transaction_minimize_impact(Manager
*m
) {
1136 /* Drops all unnecessary jobs that reverse already active jobs
1137 * or that stop a running service. */
1145 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
1146 LIST_FOREACH(transaction
, j
, j
) {
1147 bool stops_running_service
, changes_existing_job
;
1149 /* If it matters, we shouldn't drop it */
1150 if (j
->matters_to_anchor
)
1153 /* Would this stop a running service?
1154 * Would this change an existing job?
1155 * If so, let's drop this entry */
1157 stops_running_service
=
1158 j
->type
== JOB_STOP
&& UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j
->unit
));
1160 changes_existing_job
=
1161 j
->unit
->meta
.job
&&
1162 job_type_is_conflicting(j
->type
, j
->unit
->meta
.job
->type
);
1164 if (!stops_running_service
&& !changes_existing_job
)
1167 if (stops_running_service
)
1168 log_info("%s/%s would stop a running service.", j
->unit
->meta
.id
, job_type_to_string(j
->type
));
1170 if (changes_existing_job
)
1171 log_info("%s/%s would change existing job.", j
->unit
->meta
.id
, job_type_to_string(j
->type
));
1173 /* Ok, let's get rid of this */
1174 log_info("Deleting %s/%s to minimize impact.", j
->unit
->meta
.id
, job_type_to_string(j
->type
));
1176 transaction_delete_job(m
, j
, true);
1188 static int transaction_apply(Manager
*m
) {
1193 /* Moves the transaction jobs to the set of active jobs */
1195 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
1197 assert(!j
->transaction_prev
);
1198 assert(!j
->transaction_next
);
1203 if ((r
= hashmap_put(m
->jobs
, UINT32_TO_PTR(j
->id
), j
)) < 0)
1207 while ((j
= hashmap_steal_first(m
->transaction_jobs
))) {
1209 /* log_debug("Skipping already installed job %s/%s as %u", j->unit->meta.id, job_type_to_string(j->type), (unsigned) j->id); */
1213 if (j
->unit
->meta
.job
)
1214 job_free(j
->unit
->meta
.job
);
1216 j
->unit
->meta
.job
= j
;
1217 j
->installed
= true;
1218 m
->n_installed_jobs
++;
1220 /* We're fully installed. Now let's free data we don't
1223 assert(!j
->transaction_next
);
1224 assert(!j
->transaction_prev
);
1226 job_add_to_run_queue(j
);
1227 job_add_to_dbus_queue(j
);
1230 log_debug("Installed new job %s/%s as %u", j
->unit
->meta
.id
, job_type_to_string(j
->type
), (unsigned) j
->id
);
1233 /* As last step, kill all remaining job dependencies. */
1234 transaction_clean_dependencies(m
);
1240 HASHMAP_FOREACH(j
, m
->transaction_jobs
, i
) {
1244 hashmap_remove(m
->jobs
, UINT32_TO_PTR(j
->id
));
1250 static int transaction_activate(Manager
*m
, JobMode mode
, DBusError
*e
) {
1252 unsigned generation
= 1;
1256 /* This applies the changes recorded in transaction_jobs to
1257 * the actual list of jobs, if possible. */
1259 /* First step: figure out which jobs matter */
1260 transaction_find_jobs_that_matter_to_anchor(m
, NULL
, generation
++);
1262 /* Second step: Try not to stop any running services if
1263 * we don't have to. Don't try to reverse running
1264 * jobs if we don't have to. */
1265 if (mode
== JOB_FAIL
)
1266 transaction_minimize_impact(m
);
1268 /* Third step: Drop redundant jobs */
1269 transaction_drop_redundant(m
);
1272 /* Fourth step: Let's remove unneeded jobs that might
1274 transaction_collect_garbage(m
);
1276 /* Fifth step: verify order makes sense and correct
1277 * cycles if necessary and possible */
1278 if ((r
= transaction_verify_order(m
, &generation
, e
)) >= 0)
1282 log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error(e
, r
));
1286 /* Let's see if the resulting transaction ordering
1287 * graph is still cyclic... */
1291 /* Sixth step: let's drop unmergeable entries if
1292 * necessary and possible, merge entries we can
1294 if ((r
= transaction_merge_jobs(m
, e
)) >= 0)
1298 log_warning("Requested transaction contains unmergeable jobs: %s", bus_error(e
, r
));
1302 /* Seventh step: an entry got dropped, let's garbage
1303 * collect its dependencies. */
1304 transaction_collect_garbage(m
);
1306 /* Let's see if the resulting transaction still has
1307 * unmergeable entries ... */
1310 /* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */
1311 transaction_drop_redundant(m
);
1313 /* Ninth step: check whether we can actually apply this */
1314 if (mode
== JOB_FAIL
)
1315 if ((r
= transaction_is_destructive(m
, e
)) < 0) {
1316 log_notice("Requested transaction contradicts existing jobs: %s", bus_error(e
, r
));
1320 /* Tenth step: apply changes */
1321 if ((r
= transaction_apply(m
)) < 0) {
1322 log_warning("Failed to apply transaction: %s", strerror(-r
));
1326 assert(hashmap_isempty(m
->transaction_jobs
));
1327 assert(!m
->transaction_anchor
);
1332 transaction_abort(m
);
1336 static Job
* transaction_add_one_job(Manager
*m
, JobType type
, Unit
*unit
, bool override
, bool *is_new
) {
1342 /* Looks for an existing prospective job and returns that. If
1343 * it doesn't exist it is created and added to the prospective
1346 f
= hashmap_get(m
->transaction_jobs
, unit
);
1348 LIST_FOREACH(transaction
, j
, f
) {
1349 assert(j
->unit
== unit
);
1351 if (j
->type
== type
) {
1358 if (unit
->meta
.job
&& unit
->meta
.job
->type
== type
)
1360 else if (!(j
= job_new(m
, type
, unit
)))
1365 j
->matters_to_anchor
= false;
1366 j
->override
= override
;
1368 LIST_PREPEND(Job
, transaction
, f
, j
);
1370 if (hashmap_replace(m
->transaction_jobs
, unit
, f
) < 0) {
1378 /* log_debug("Added job %s/%s to transaction.", unit->meta.id, job_type_to_string(type)); */
1383 void manager_transaction_unlink_job(Manager
*m
, Job
*j
, bool delete_dependencies
) {
1387 if (j
->transaction_prev
)
1388 j
->transaction_prev
->transaction_next
= j
->transaction_next
;
1389 else if (j
->transaction_next
)
1390 hashmap_replace(m
->transaction_jobs
, j
->unit
, j
->transaction_next
);
1392 hashmap_remove_value(m
->transaction_jobs
, j
->unit
, j
);
1394 if (j
->transaction_next
)
1395 j
->transaction_next
->transaction_prev
= j
->transaction_prev
;
1397 j
->transaction_prev
= j
->transaction_next
= NULL
;
1399 while (j
->subject_list
)
1400 job_dependency_free(j
->subject_list
);
1402 while (j
->object_list
) {
1403 Job
*other
= j
->object_list
->matters
? j
->object_list
->subject
: NULL
;
1405 job_dependency_free(j
->object_list
);
1407 if (other
&& delete_dependencies
) {
1408 log_debug("Deleting job %s/%s as dependency of job %s/%s",
1409 other
->unit
->meta
.id
, job_type_to_string(other
->type
),
1410 j
->unit
->meta
.id
, job_type_to_string(j
->type
));
1411 transaction_delete_job(m
, other
, delete_dependencies
);
1416 static int transaction_add_job_and_dependencies(
1434 assert(type
< _JOB_TYPE_MAX
);
1437 /* log_debug("Pulling in %s/%s from %s/%s", */
1438 /* unit->meta.id, job_type_to_string(type), */
1439 /* by ? by->unit->meta.id : "NA", */
1440 /* by ? job_type_to_string(by->type) : "NA"); */
1442 if (unit
->meta
.load_state
!= UNIT_LOADED
&&
1443 unit
->meta
.load_state
!= UNIT_ERROR
&&
1444 unit
->meta
.load_state
!= UNIT_MASKED
) {
1445 dbus_set_error(e
, BUS_ERROR_LOAD_FAILED
, "Unit %s is not loaded properly.", unit
->meta
.id
);
1449 if (type
!= JOB_STOP
&& unit
->meta
.load_state
== UNIT_ERROR
) {
1450 dbus_set_error(e
, BUS_ERROR_LOAD_FAILED
,
1451 "Unit %s failed to load: %s. "
1452 "See system logs and 'systemctl status' for details.",
1454 strerror(-unit
->meta
.load_error
));
1458 if (type
!= JOB_STOP
&& unit
->meta
.load_state
== UNIT_MASKED
) {
1459 dbus_set_error(e
, BUS_ERROR_MASKED
, "Unit %s is masked.", unit
->meta
.id
);
1463 if (!unit_job_is_applicable(unit
, type
)) {
1464 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
);
1468 /* First add the job. */
1469 if (!(ret
= transaction_add_one_job(m
, type
, unit
, override
, &is_new
)))
1472 ret
->ignore_deps
= ret
->ignore_deps
|| ignore_deps
;
1474 /* Then, add a link to the job. */
1475 if (!job_dependency_new(by
, ret
, matters
, conflicts
))
1478 if (is_new
&& !ignore_deps
) {
1481 /* If we are following some other unit, make sure we
1482 * add all dependencies of everybody following. */
1483 if (unit_following_set(ret
->unit
, &following
) > 0) {
1484 SET_FOREACH(dep
, following
, i
)
1485 if ((r
= transaction_add_job_and_dependencies(m
, type
, dep
, ret
, false, override
, false, false, e
, NULL
)) < 0) {
1486 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep
->meta
.id
, bus_error(e
, r
));
1492 set_free(following
);
1495 /* Finally, recursively add in all dependencies. */
1496 if (type
== JOB_START
|| type
== JOB_RELOAD_OR_START
) {
1497 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_REQUIRES
], i
)
1498 if ((r
= transaction_add_job_and_dependencies(m
, JOB_START
, dep
, ret
, true, override
, false, false, e
, NULL
)) < 0) {
1506 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_BIND_TO
], i
)
1507 if ((r
= transaction_add_job_and_dependencies(m
, JOB_START
, dep
, ret
, true, override
, false, false, e
, NULL
)) < 0) {
1516 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_REQUIRES_OVERRIDABLE
], i
)
1517 if ((r
= transaction_add_job_and_dependencies(m
, JOB_START
, dep
, ret
, !override
, override
, false, false, e
, NULL
)) < 0) {
1518 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep
->meta
.id
, bus_error(e
, r
));
1524 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_WANTS
], i
)
1525 if ((r
= transaction_add_job_and_dependencies(m
, JOB_START
, dep
, ret
, false, false, false, false, e
, NULL
)) < 0) {
1526 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep
->meta
.id
, bus_error(e
, r
));
1532 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_REQUISITE
], i
)
1533 if ((r
= transaction_add_job_and_dependencies(m
, JOB_VERIFY_ACTIVE
, dep
, ret
, true, override
, false, false, e
, NULL
)) < 0) {
1542 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_REQUISITE_OVERRIDABLE
], i
)
1543 if ((r
= transaction_add_job_and_dependencies(m
, JOB_VERIFY_ACTIVE
, dep
, ret
, !override
, override
, false, false, e
, NULL
)) < 0) {
1544 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep
->meta
.id
, bus_error(e
, r
));
1550 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_CONFLICTS
], i
)
1551 if ((r
= transaction_add_job_and_dependencies(m
, JOB_STOP
, dep
, ret
, true, override
, true, false, e
, NULL
)) < 0) {
1560 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_CONFLICTED_BY
], i
)
1561 if ((r
= transaction_add_job_and_dependencies(m
, JOB_STOP
, dep
, ret
, false, override
, false, false, e
, NULL
)) < 0) {
1562 log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep
->meta
.id
, bus_error(e
, r
));
1568 } else if (type
== JOB_STOP
|| type
== JOB_RESTART
|| type
== JOB_TRY_RESTART
) {
1570 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_REQUIRED_BY
], i
)
1571 if ((r
= transaction_add_job_and_dependencies(m
, type
, dep
, ret
, true, override
, false, false, e
, NULL
)) < 0) {
1580 SET_FOREACH(dep
, ret
->unit
->meta
.dependencies
[UNIT_BOUND_BY
], i
)
1581 if ((r
= transaction_add_job_and_dependencies(m
, type
, dep
, ret
, true, override
, false, false, e
, NULL
)) < 0) {
1591 /* JOB_VERIFY_STARTED, JOB_RELOAD require no dependency handling */
1603 static int transaction_add_isolate_jobs(Manager
*m
) {
1611 HASHMAP_FOREACH_KEY(u
, k
, m
->units
, i
) {
1613 /* ignore aliases */
1614 if (u
->meta
.id
!= k
)
1617 if (UNIT_VTABLE(u
)->no_isolate
)
1620 /* No need to stop inactive jobs */
1621 if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u
)) && !u
->meta
.job
)
1624 /* Is there already something listed for this? */
1625 if (hashmap_get(m
->transaction_jobs
, u
))
1628 if ((r
= transaction_add_job_and_dependencies(m
, JOB_STOP
, u
, NULL
, true, false, false, false, NULL
, NULL
)) < 0)
1629 log_warning("Cannot add isolate job for unit %s, ignoring: %s", u
->meta
.id
, strerror(-r
));
1635 int manager_add_job(Manager
*m
, JobType type
, Unit
*unit
, JobMode mode
, bool override
, DBusError
*e
, Job
**_ret
) {
1640 assert(type
< _JOB_TYPE_MAX
);
1642 assert(mode
< _JOB_MODE_MAX
);
1644 if (mode
== JOB_ISOLATE
&& type
!= JOB_START
) {
1645 dbus_set_error(e
, BUS_ERROR_INVALID_JOB_MODE
, "Isolate is only valid for start.");
1649 if (mode
== JOB_ISOLATE
&& !unit
->meta
.allow_isolate
) {
1650 dbus_set_error(e
, BUS_ERROR_NO_ISOLATION
, "Operation refused, unit may not be isolated.");
1654 log_debug("Trying to enqueue job %s/%s/%s", unit
->meta
.id
, job_type_to_string(type
), job_mode_to_string(mode
));
1656 if ((r
= transaction_add_job_and_dependencies(m
, type
, unit
, NULL
, true, override
, false, mode
== JOB_IGNORE_DEPENDENCIES
, e
, &ret
)) < 0) {
1657 transaction_abort(m
);
1661 if (mode
== JOB_ISOLATE
)
1662 if ((r
= transaction_add_isolate_jobs(m
)) < 0) {
1663 transaction_abort(m
);
1667 if ((r
= transaction_activate(m
, mode
, e
)) < 0)
1670 log_debug("Enqueued job %s/%s as %u", unit
->meta
.id
, job_type_to_string(type
), (unsigned) ret
->id
);
1678 int manager_add_job_by_name(Manager
*m
, JobType type
, const char *name
, JobMode mode
, bool override
, DBusError
*e
, Job
**_ret
) {
1683 assert(type
< _JOB_TYPE_MAX
);
1685 assert(mode
< _JOB_MODE_MAX
);
1687 if ((r
= manager_load_unit(m
, name
, NULL
, NULL
, &unit
)) < 0)
1690 return manager_add_job(m
, type
, unit
, mode
, override
, e
, _ret
);
1693 Job
*manager_get_job(Manager
*m
, uint32_t id
) {
1696 return hashmap_get(m
->jobs
, UINT32_TO_PTR(id
));
1699 Unit
*manager_get_unit(Manager
*m
, const char *name
) {
1703 return hashmap_get(m
->units
, name
);
1706 unsigned manager_dispatch_load_queue(Manager
*m
) {
1712 /* Make sure we are not run recursively */
1713 if (m
->dispatching_load_queue
)
1716 m
->dispatching_load_queue
= true;
1718 /* Dispatches the load queue. Takes a unit from the queue and
1719 * tries to load its data until the queue is empty */
1721 while ((meta
= m
->load_queue
)) {
1722 assert(meta
->in_load_queue
);
1724 unit_load((Unit
*) meta
);
1728 m
->dispatching_load_queue
= false;
1732 int manager_load_unit_prepare(Manager
*m
, const char *name
, const char *path
, DBusError
*e
, Unit
**_ret
) {
1737 assert(name
|| path
);
1739 /* This will prepare the unit for loading, but not actually
1740 * load anything from disk. */
1742 if (path
&& !is_path(path
)) {
1743 dbus_set_error(e
, BUS_ERROR_INVALID_PATH
, "Path %s is not absolute.", path
);
1748 name
= file_name_from_path(path
);
1750 if (!unit_name_is_valid(name
, false)) {
1751 dbus_set_error(e
, BUS_ERROR_INVALID_NAME
, "Unit name %s is not valid.", name
);
1755 if ((ret
= manager_get_unit(m
, name
))) {
1760 if (!(ret
= unit_new(m
)))
1764 if (!(ret
->meta
.fragment_path
= strdup(path
))) {
1769 if ((r
= unit_add_name(ret
, name
)) < 0) {
1774 unit_add_to_load_queue(ret
);
1775 unit_add_to_dbus_queue(ret
);
1776 unit_add_to_gc_queue(ret
);
1784 int manager_load_unit(Manager
*m
, const char *name
, const char *path
, DBusError
*e
, Unit
**_ret
) {
1789 /* This will load the service information files, but not actually
1790 * start any services or anything. */
1792 if ((r
= manager_load_unit_prepare(m
, name
, path
, e
, _ret
)) != 0)
1795 manager_dispatch_load_queue(m
);
1798 *_ret
= unit_follow_merge(*_ret
);
1803 void manager_dump_jobs(Manager
*s
, FILE *f
, const char *prefix
) {
1810 HASHMAP_FOREACH(j
, s
->jobs
, i
)
1811 job_dump(j
, f
, prefix
);
1814 void manager_dump_units(Manager
*s
, FILE *f
, const char *prefix
) {
1822 HASHMAP_FOREACH_KEY(u
, t
, s
->units
, i
)
1823 if (u
->meta
.id
== t
)
1824 unit_dump(u
, f
, prefix
);
1827 void manager_clear_jobs(Manager
*m
) {
1832 transaction_abort(m
);
1834 while ((j
= hashmap_first(m
->jobs
)))
1835 job_finish_and_invalidate(j
, JOB_CANCELED
);
1838 unsigned manager_dispatch_run_queue(Manager
*m
) {
1842 if (m
->dispatching_run_queue
)
1845 m
->dispatching_run_queue
= true;
1847 while ((j
= m
->run_queue
)) {
1848 assert(j
->installed
);
1849 assert(j
->in_run_queue
);
1851 job_run_and_invalidate(j
);
1855 m
->dispatching_run_queue
= false;
1859 unsigned manager_dispatch_dbus_queue(Manager
*m
) {
1866 if (m
->dispatching_dbus_queue
)
1869 m
->dispatching_dbus_queue
= true;
1871 while ((meta
= m
->dbus_unit_queue
)) {
1872 assert(meta
->in_dbus_queue
);
1874 bus_unit_send_change_signal((Unit
*) meta
);
1878 while ((j
= m
->dbus_job_queue
)) {
1879 assert(j
->in_dbus_queue
);
1881 bus_job_send_change_signal(j
);
1885 m
->dispatching_dbus_queue
= false;
1889 static int manager_process_notify_fd(Manager
*m
) {
1896 struct msghdr msghdr
;
1898 struct ucred
*ucred
;
1900 struct cmsghdr cmsghdr
;
1901 uint8_t buf
[CMSG_SPACE(sizeof(struct ucred
))];
1907 iovec
.iov_base
= buf
;
1908 iovec
.iov_len
= sizeof(buf
)-1;
1912 msghdr
.msg_iov
= &iovec
;
1913 msghdr
.msg_iovlen
= 1;
1914 msghdr
.msg_control
= &control
;
1915 msghdr
.msg_controllen
= sizeof(control
);
1917 if ((n
= recvmsg(m
->notify_watch
.fd
, &msghdr
, MSG_DONTWAIT
)) <= 0) {
1921 if (errno
== EAGAIN
|| errno
== EINTR
)
1927 if (msghdr
.msg_controllen
< CMSG_LEN(sizeof(struct ucred
)) ||
1928 control
.cmsghdr
.cmsg_level
!= SOL_SOCKET
||
1929 control
.cmsghdr
.cmsg_type
!= SCM_CREDENTIALS
||
1930 control
.cmsghdr
.cmsg_len
!= CMSG_LEN(sizeof(struct ucred
))) {
1931 log_warning("Received notify message without credentials. Ignoring.");
1935 ucred
= (struct ucred
*) CMSG_DATA(&control
.cmsghdr
);
1937 if (!(u
= hashmap_get(m
->watch_pids
, LONG_TO_PTR(ucred
->pid
))))
1938 if (!(u
= cgroup_unit_by_pid(m
, ucred
->pid
))) {
1939 log_warning("Cannot find unit for notify message of PID %lu.", (unsigned long) ucred
->pid
);
1943 assert((size_t) n
< sizeof(buf
));
1945 if (!(tags
= strv_split(buf
, "\n\r")))
1948 log_debug("Got notification message for unit %s", u
->meta
.id
);
1950 if (UNIT_VTABLE(u
)->notify_message
)
1951 UNIT_VTABLE(u
)->notify_message(u
, ucred
->pid
, tags
);
1959 static int manager_dispatch_sigchld(Manager
*m
) {
1969 /* First we call waitd() for a PID and do not reap the
1970 * zombie. That way we can still access /proc/$PID for
1971 * it while it is a zombie. */
1972 if (waitid(P_ALL
, 0, &si
, WEXITED
|WNOHANG
|WNOWAIT
) < 0) {
1974 if (errno
== ECHILD
)
1986 if (si
.si_code
== CLD_EXITED
|| si
.si_code
== CLD_KILLED
|| si
.si_code
== CLD_DUMPED
) {
1989 get_process_name(si
.si_pid
, &name
);
1990 log_debug("Got SIGCHLD for process %lu (%s)", (unsigned long) si
.si_pid
, strna(name
));
1994 /* Let's flush any message the dying child might still
1995 * have queued for us. This ensures that the process
1996 * still exists in /proc so that we can figure out
1997 * which cgroup and hence unit it belongs to. */
1998 if ((r
= manager_process_notify_fd(m
)) < 0)
2001 /* And now figure out the unit this belongs to */
2002 if (!(u
= hashmap_get(m
->watch_pids
, LONG_TO_PTR(si
.si_pid
))))
2003 u
= cgroup_unit_by_pid(m
, si
.si_pid
);
2005 /* And now, we actually reap the zombie. */
2006 if (waitid(P_PID
, si
.si_pid
, &si
, WEXITED
) < 0) {
2013 if (si
.si_code
!= CLD_EXITED
&& si
.si_code
!= CLD_KILLED
&& si
.si_code
!= CLD_DUMPED
)
2016 log_debug("Child %lu died (code=%s, status=%i/%s)",
2017 (long unsigned) si
.si_pid
,
2018 sigchld_code_to_string(si
.si_code
),
2020 strna(si
.si_code
== CLD_EXITED
2021 ? exit_status_to_string(si
.si_status
, EXIT_STATUS_FULL
)
2022 : signal_to_string(si
.si_status
)));
2027 log_debug("Child %lu belongs to %s", (long unsigned) si
.si_pid
, u
->meta
.id
);
2029 hashmap_remove(m
->watch_pids
, LONG_TO_PTR(si
.si_pid
));
2030 UNIT_VTABLE(u
)->sigchld_event(u
, si
.si_pid
, si
.si_code
, si
.si_status
);
2036 static int manager_start_target(Manager
*m
, const char *name
, JobMode mode
) {
2040 dbus_error_init(&error
);
2042 log_debug("Activating special unit %s", name
);
2044 if ((r
= manager_add_job_by_name(m
, JOB_START
, name
, mode
, true, &error
, NULL
)) < 0)
2045 log_error("Failed to enqueue %s job: %s", name
, bus_error(&error
, r
));
2047 dbus_error_free(&error
);
2052 static int manager_process_signal_fd(Manager
*m
) {
2054 struct signalfd_siginfo sfsi
;
2055 bool sigchld
= false;
2062 if ((n
= read(m
->signal_watch
.fd
, &sfsi
, sizeof(sfsi
))) != sizeof(sfsi
)) {
2067 if (errno
== EINTR
|| errno
== EAGAIN
)
2073 if (sfsi
.ssi_pid
> 0)
2074 get_process_name(sfsi
.ssi_pid
, &p
);
2076 log_debug("Received SIG%s from PID %lu (%s)",
2077 strna(signal_to_string(sfsi
.ssi_signo
)),
2078 (unsigned long) sfsi
.ssi_pid
, strna(p
));
2081 switch (sfsi
.ssi_signo
) {
2088 if (m
->running_as
== MANAGER_SYSTEM
) {
2089 /* This is for compatibility with the
2090 * original sysvinit */
2091 m
->exit_code
= MANAGER_REEXECUTE
;
2098 if (m
->running_as
== MANAGER_SYSTEM
) {
2099 manager_start_target(m
, SPECIAL_CTRL_ALT_DEL_TARGET
, JOB_REPLACE
);
2103 /* Run the exit target if there is one, if not, just exit. */
2104 if (manager_start_target(m
, SPECIAL_EXIT_TARGET
, JOB_REPLACE
) < 0) {
2105 m
->exit_code
= MANAGER_EXIT
;
2112 if (m
->running_as
== MANAGER_SYSTEM
)
2113 manager_start_target(m
, SPECIAL_KBREQUEST_TARGET
, JOB_REPLACE
);
2115 /* This is a nop on non-init */
2119 if (m
->running_as
== MANAGER_SYSTEM
)
2120 manager_start_target(m
, SPECIAL_SIGPWR_TARGET
, JOB_REPLACE
);
2122 /* This is a nop on non-init */
2128 u
= manager_get_unit(m
, SPECIAL_DBUS_SERVICE
);
2130 if (!u
|| UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u
))) {
2131 log_info("Trying to reconnect to bus...");
2135 if (!u
|| !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
))) {
2136 log_info("Loading D-Bus service...");
2137 manager_start_target(m
, SPECIAL_DBUS_SERVICE
, JOB_REPLACE
);
2148 if (!(f
= open_memstream(&dump
, &size
))) {
2149 log_warning("Failed to allocate memory stream.");
2153 manager_dump_units(m
, f
, "\t");
2154 manager_dump_jobs(m
, f
, "\t");
2159 log_warning("Failed to write status stream");
2164 log_dump(LOG_INFO
, dump
);
2171 m
->exit_code
= MANAGER_RELOAD
;
2175 /* Starting SIGRTMIN+0 */
2176 static const char * const target_table
[] = {
2177 [0] = SPECIAL_DEFAULT_TARGET
,
2178 [1] = SPECIAL_RESCUE_TARGET
,
2179 [2] = SPECIAL_EMERGENCY_TARGET
,
2180 [3] = SPECIAL_HALT_TARGET
,
2181 [4] = SPECIAL_POWEROFF_TARGET
,
2182 [5] = SPECIAL_REBOOT_TARGET
,
2183 [6] = SPECIAL_KEXEC_TARGET
2186 /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
2187 static const ManagerExitCode code_table
[] = {
2189 [1] = MANAGER_POWEROFF
,
2190 [2] = MANAGER_REBOOT
,
2194 if ((int) sfsi
.ssi_signo
>= SIGRTMIN
+0 &&
2195 (int) sfsi
.ssi_signo
< SIGRTMIN
+(int) ELEMENTSOF(target_table
)) {
2196 manager_start_target(m
, target_table
[sfsi
.ssi_signo
- SIGRTMIN
],
2197 (sfsi
.ssi_signo
== 1 || sfsi
.ssi_signo
== 2) ? JOB_ISOLATE
: JOB_REPLACE
);
2201 if ((int) sfsi
.ssi_signo
>= SIGRTMIN
+13 &&
2202 (int) sfsi
.ssi_signo
< SIGRTMIN
+13+(int) ELEMENTSOF(code_table
)) {
2203 m
->exit_code
= code_table
[sfsi
.ssi_signo
- SIGRTMIN
- 13];
2207 switch (sfsi
.ssi_signo
- SIGRTMIN
) {
2210 log_debug("Enabling showing of status.");
2211 m
->show_status
= true;
2215 log_debug("Disabling showing of status.");
2216 m
->show_status
= false;
2220 log_warning("Got unhandled signal <%s>.", strna(signal_to_string(sfsi
.ssi_signo
)));
2227 return manager_dispatch_sigchld(m
);
2232 static int process_event(Manager
*m
, struct epoll_event
*ev
) {
2239 assert(w
= ev
->data
.ptr
);
2241 if (w
->type
== WATCH_INVALID
)
2248 /* An incoming signal? */
2249 if (ev
->events
!= EPOLLIN
)
2252 if ((r
= manager_process_signal_fd(m
)) < 0)
2259 /* An incoming daemon notification event? */
2260 if (ev
->events
!= EPOLLIN
)
2263 if ((r
= manager_process_notify_fd(m
)) < 0)
2270 /* Some fd event, to be dispatched to the units */
2271 UNIT_VTABLE(w
->data
.unit
)->fd_event(w
->data
.unit
, w
->fd
, ev
->events
, w
);
2274 case WATCH_UNIT_TIMER
:
2275 case WATCH_JOB_TIMER
: {
2279 /* Some timer event, to be dispatched to the units */
2280 if ((k
= read(w
->fd
, &v
, sizeof(v
))) != sizeof(v
)) {
2282 if (k
< 0 && (errno
== EINTR
|| errno
== EAGAIN
))
2285 return k
< 0 ? -errno
: -EIO
;
2288 if (w
->type
== WATCH_UNIT_TIMER
)
2289 UNIT_VTABLE(w
->data
.unit
)->timer_event(w
->data
.unit
, v
, w
);
2291 job_timer_event(w
->data
.job
, v
, w
);
2296 /* Some mount table change, intended for the mount subsystem */
2297 mount_fd_event(m
, ev
->events
);
2301 /* Some swap table change, intended for the swap subsystem */
2302 swap_fd_event(m
, ev
->events
);
2306 /* Some notification from udev, intended for the device subsystem */
2307 device_fd_event(m
, ev
->events
);
2310 case WATCH_DBUS_WATCH
:
2311 bus_watch_event(m
, w
, ev
->events
);
2314 case WATCH_DBUS_TIMEOUT
:
2315 bus_timeout_event(m
, w
, ev
->events
);
2319 log_error("event type=%i", w
->type
);
2320 assert_not_reached("Unknown epoll event type.");
2326 int manager_loop(Manager
*m
) {
2329 RATELIMIT_DEFINE(rl
, 1*USEC_PER_SEC
, 1000);
2332 m
->exit_code
= MANAGER_RUNNING
;
2334 /* Release the path cache */
2335 set_free_free(m
->unit_path_cache
);
2336 m
->unit_path_cache
= NULL
;
2338 manager_check_finished(m
);
2340 /* There might still be some zombies hanging around from
2341 * before we were exec()'ed. Leat's reap them */
2342 if ((r
= manager_dispatch_sigchld(m
)) < 0)
2345 while (m
->exit_code
== MANAGER_RUNNING
) {
2346 struct epoll_event event
;
2349 if (!ratelimit_test(&rl
)) {
2350 /* Yay, something is going seriously wrong, pause a little */
2351 log_warning("Looping too fast. Throttling execution a little.");
2355 if (manager_dispatch_load_queue(m
) > 0)
2358 if (manager_dispatch_run_queue(m
) > 0)
2361 if (bus_dispatch(m
) > 0)
2364 if (manager_dispatch_cleanup_queue(m
) > 0)
2367 if (manager_dispatch_gc_queue(m
) > 0)
2370 if (manager_dispatch_dbus_queue(m
) > 0)
2373 if (swap_dispatch_reload(m
) > 0)
2376 if ((n
= epoll_wait(m
->epoll_fd
, &event
, 1, -1)) < 0) {
2386 if ((r
= process_event(m
, &event
)) < 0)
2390 return m
->exit_code
;
2393 int manager_get_unit_from_dbus_path(Manager
*m
, const char *s
, Unit
**_u
) {
2401 if (!startswith(s
, "/org/freedesktop/systemd1/unit/"))
2404 if (!(n
= bus_path_unescape(s
+31)))
2407 u
= manager_get_unit(m
, n
);
2418 int manager_get_job_from_dbus_path(Manager
*m
, const char *s
, Job
**_j
) {
2427 if (!startswith(s
, "/org/freedesktop/systemd1/job/"))
2430 if ((r
= safe_atou(s
+ 30, &id
)) < 0)
2433 if (!(j
= manager_get_job(m
, id
)))
2441 void manager_send_unit_audit(Manager
*m
, Unit
*u
, int type
, bool success
) {
2446 if (m
->audit_fd
< 0)
2449 /* Don't generate audit events if the service was already
2450 * started and we're just deserializing */
2451 if (m
->n_deserializing
> 0)
2454 if (m
->running_as
!= MANAGER_SYSTEM
)
2457 if (u
->meta
.type
!= UNIT_SERVICE
)
2460 if (!(p
= unit_name_to_prefix_and_instance(u
->meta
.id
))) {
2461 log_error("Failed to allocate unit name for audit message: %s", strerror(ENOMEM
));
2465 if (audit_log_user_comm_message(m
->audit_fd
, type
, "", p
, NULL
, NULL
, NULL
, success
) < 0) {
2466 log_warning("Failed to send audit message: %m");
2468 if (errno
== EPERM
) {
2469 /* We aren't allowed to send audit messages?
2470 * Then let's not retry again, to avoid
2471 * spamming the user with the same and same
2472 * messages over and over. */
2474 audit_close(m
->audit_fd
);
2484 void manager_send_unit_plymouth(Manager
*m
, Unit
*u
) {
2486 union sockaddr_union sa
;
2488 char *message
= NULL
;
2490 /* Don't generate plymouth events if the service was already
2491 * started and we're just deserializing */
2492 if (m
->n_deserializing
> 0)
2495 if (m
->running_as
!= MANAGER_SYSTEM
)
2498 if (u
->meta
.type
!= UNIT_SERVICE
&&
2499 u
->meta
.type
!= UNIT_MOUNT
&&
2500 u
->meta
.type
!= UNIT_SWAP
)
2503 /* We set SOCK_NONBLOCK here so that we rather drop the
2504 * message then wait for plymouth */
2505 if ((fd
= socket(AF_UNIX
, SOCK_STREAM
|SOCK_CLOEXEC
|SOCK_NONBLOCK
, 0)) < 0) {
2506 log_error("socket() failed: %m");
2511 sa
.sa
.sa_family
= AF_UNIX
;
2512 strncpy(sa
.un
.sun_path
+1, "/org/freedesktop/plymouthd", sizeof(sa
.un
.sun_path
)-1);
2513 if (connect(fd
, &sa
.sa
, offsetof(struct sockaddr_un
, sun_path
) + 1 + strlen(sa
.un
.sun_path
+1)) < 0) {
2515 if (errno
!= EPIPE
&&
2518 errno
!= ECONNREFUSED
&&
2519 errno
!= ECONNRESET
&&
2520 errno
!= ECONNABORTED
)
2521 log_error("connect() failed: %m");
2526 if (asprintf(&message
, "U\002%c%s%n", (int) (strlen(u
->meta
.id
) + 1), u
->meta
.id
, &n
) < 0) {
2527 log_error("Out of memory");
2532 if (write(fd
, message
, n
+ 1) != n
+ 1) {
2534 if (errno
!= EPIPE
&&
2537 errno
!= ECONNREFUSED
&&
2538 errno
!= ECONNRESET
&&
2539 errno
!= ECONNABORTED
)
2540 log_error("Failed to write Plymouth message: %m");
2547 close_nointr_nofail(fd
);
2552 void manager_dispatch_bus_name_owner_changed(
2555 const char* old_owner
,
2556 const char *new_owner
) {
2563 if (!(u
= hashmap_get(m
->watch_bus
, name
)))
2566 UNIT_VTABLE(u
)->bus_name_owner_change(u
, name
, old_owner
, new_owner
);
2569 void manager_dispatch_bus_query_pid_done(
2580 if (!(u
= hashmap_get(m
->watch_bus
, name
)))
2583 UNIT_VTABLE(u
)->bus_query_pid_done(u
, name
, pid
);
2586 int manager_open_serialization(Manager
*m
, FILE **_f
) {
2594 if (m
->running_as
== MANAGER_SYSTEM
)
2595 asprintf(&path
, "/dev/.run/systemd/dump-%lu-XXXXXX", (unsigned long) getpid());
2597 asprintf(&path
, "/tmp/systemd-dump-%lu-XXXXXX", (unsigned long) getpid());
2602 saved_umask
= umask(0077);
2603 fd
= mkostemp(path
, O_RDWR
|O_CLOEXEC
);
2613 log_debug("Serializing state to %s", path
);
2616 if (!(f
= fdopen(fd
, "w+")) < 0)
2624 int manager_serialize(Manager
*m
, FILE *f
, FDSet
*fds
) {
2634 dual_timestamp_serialize(f
, "initrd-timestamp", &m
->initrd_timestamp
);
2635 dual_timestamp_serialize(f
, "startup-timestamp", &m
->startup_timestamp
);
2636 dual_timestamp_serialize(f
, "finish-timestamp", &m
->finish_timestamp
);
2640 HASHMAP_FOREACH_KEY(u
, t
, m
->units
, i
) {
2641 if (u
->meta
.id
!= t
)
2644 if (!unit_can_serialize(u
))
2648 fputs(u
->meta
.id
, f
);
2651 if ((r
= unit_serialize(u
, f
, fds
)) < 0)
2661 int manager_deserialize(Manager
*m
, FILE *f
, FDSet
*fds
) {
2667 log_debug("Deserializing state...");
2669 m
->n_deserializing
++;
2672 char line
[1024], *l
;
2674 if (!fgets(line
, sizeof(line
), f
)) {
2689 if (startswith(l
, "initrd-timestamp="))
2690 dual_timestamp_deserialize(l
+17, &m
->initrd_timestamp
);
2691 else if (startswith(l
, "startup-timestamp="))
2692 dual_timestamp_deserialize(l
+18, &m
->startup_timestamp
);
2693 else if (startswith(l
, "finish-timestamp="))
2694 dual_timestamp_deserialize(l
+17, &m
->finish_timestamp
);
2696 log_debug("Unknown serialization item '%s'", l
);
2701 char name
[UNIT_NAME_MAX
+2];
2704 if (!fgets(name
, sizeof(name
), f
)) {
2715 if ((r
= manager_load_unit(m
, strstrip(name
), NULL
, NULL
, &u
)) < 0)
2718 if ((r
= unit_deserialize(u
, f
, fds
)) < 0)
2728 assert(m
->n_deserializing
> 0);
2729 m
->n_deserializing
--;
2734 int manager_reload(Manager
*m
) {
2741 if ((r
= manager_open_serialization(m
, &f
)) < 0)
2744 if (!(fds
= fdset_new())) {
2749 if ((r
= manager_serialize(m
, f
, fds
)) < 0)
2752 if (fseeko(f
, 0, SEEK_SET
) < 0) {
2757 /* From here on there is no way back. */
2758 manager_clear_jobs_and_units(m
);
2759 manager_undo_generators(m
);
2761 /* Find new unit paths */
2762 lookup_paths_free(&m
->lookup_paths
);
2763 if ((q
= lookup_paths_init(&m
->lookup_paths
, m
->running_as
)) < 0)
2766 manager_run_generators(m
);
2768 manager_build_unit_path_cache(m
);
2770 m
->n_deserializing
++;
2772 /* First, enumerate what we can from all config files */
2773 if ((q
= manager_enumerate(m
)) < 0)
2776 /* Second, deserialize our stored data */
2777 if ((q
= manager_deserialize(m
, f
, fds
)) < 0)
2783 /* Third, fire things up! */
2784 if ((q
= manager_coldplug(m
)) < 0)
2787 assert(m
->n_deserializing
> 0);
2788 m
->n_deserializing
++;
2800 bool manager_is_booting_or_shutting_down(Manager
*m
) {
2805 /* Is the initial job still around? */
2806 if (manager_get_job(m
, 1))
2809 /* Is there a job for the shutdown target? */
2810 if (((u
= manager_get_unit(m
, SPECIAL_SHUTDOWN_TARGET
))))
2811 return !!u
->meta
.job
;
2816 void manager_reset_failed(Manager
*m
) {
2822 HASHMAP_FOREACH(u
, m
->units
, i
)
2823 unit_reset_failed(u
);
2826 bool manager_unit_pending_inactive(Manager
*m
, const char *name
) {
2832 /* Returns true if the unit is inactive or going down */
2833 if (!(u
= manager_get_unit(m
, name
)))
2836 return unit_pending_inactive(u
);
2839 void manager_check_finished(Manager
*m
) {
2840 char userspace
[FORMAT_TIMESPAN_MAX
], initrd
[FORMAT_TIMESPAN_MAX
], kernel
[FORMAT_TIMESPAN_MAX
], sum
[FORMAT_TIMESPAN_MAX
];
2844 if (dual_timestamp_is_set(&m
->finish_timestamp
))
2847 if (hashmap_size(m
->jobs
) > 0)
2850 dual_timestamp_get(&m
->finish_timestamp
);
2852 if (m
->running_as
== MANAGER_SYSTEM
&& detect_container(NULL
) <= 0) {
2854 if (dual_timestamp_is_set(&m
->initrd_timestamp
)) {
2855 log_info("Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.",
2856 format_timespan(kernel
, sizeof(kernel
),
2857 m
->initrd_timestamp
.monotonic
),
2858 format_timespan(initrd
, sizeof(initrd
),
2859 m
->startup_timestamp
.monotonic
- m
->initrd_timestamp
.monotonic
),
2860 format_timespan(userspace
, sizeof(userspace
),
2861 m
->finish_timestamp
.monotonic
- m
->startup_timestamp
.monotonic
),
2862 format_timespan(sum
, sizeof(sum
),
2863 m
->finish_timestamp
.monotonic
));
2865 log_info("Startup finished in %s (kernel) + %s (userspace) = %s.",
2866 format_timespan(kernel
, sizeof(kernel
),
2867 m
->startup_timestamp
.monotonic
),
2868 format_timespan(userspace
, sizeof(userspace
),
2869 m
->finish_timestamp
.monotonic
- m
->startup_timestamp
.monotonic
),
2870 format_timespan(sum
, sizeof(sum
),
2871 m
->finish_timestamp
.monotonic
));
2873 log_debug("Startup finished in %s.",
2874 format_timespan(userspace
, sizeof(userspace
),
2875 m
->finish_timestamp
.monotonic
- m
->startup_timestamp
.monotonic
));
2879 void manager_run_generators(Manager
*m
) {
2881 const char *generator_path
;
2882 const char *argv
[3];
2886 generator_path
= m
->running_as
== MANAGER_SYSTEM
? SYSTEM_GENERATOR_PATH
: USER_GENERATOR_PATH
;
2887 if (!(d
= opendir(generator_path
))) {
2889 if (errno
== ENOENT
)
2892 log_error("Failed to enumerate generator directory: %m");
2896 if (!m
->generator_unit_path
) {
2898 char system_path
[] = "/dev/.run/systemd/generator-XXXXXX",
2899 user_path
[] = "/tmp/systemd-generator-XXXXXX";
2901 if (!(p
= mkdtemp(m
->running_as
== MANAGER_SYSTEM
? system_path
: user_path
))) {
2902 log_error("Failed to generate generator directory: %m");
2906 if (!(m
->generator_unit_path
= strdup(p
))) {
2907 log_error("Failed to allocate generator unit path.");
2912 argv
[0] = NULL
; /* Leave this empty, execute_directory() will fill something in */
2913 argv
[1] = m
->generator_unit_path
;
2916 execute_directory(generator_path
, d
, (char**) argv
);
2918 if (rmdir(m
->generator_unit_path
) >= 0) {
2919 /* Uh? we were able to remove this dir? I guess that
2920 * means the directory was empty, hence let's shortcut
2923 free(m
->generator_unit_path
);
2924 m
->generator_unit_path
= NULL
;
2928 if (!strv_find(m
->lookup_paths
.unit_path
, m
->generator_unit_path
)) {
2931 if (!(l
= strv_append(m
->lookup_paths
.unit_path
, m
->generator_unit_path
))) {
2932 log_error("Failed to add generator directory to unit search path: %m");
2936 strv_free(m
->lookup_paths
.unit_path
);
2937 m
->lookup_paths
.unit_path
= l
;
2939 log_debug("Added generator unit path %s to search path.", m
->generator_unit_path
);
2947 void manager_undo_generators(Manager
*m
) {
2950 if (!m
->generator_unit_path
)
2953 strv_remove(m
->lookup_paths
.unit_path
, m
->generator_unit_path
);
2954 rm_rf(m
->generator_unit_path
, false, true);
2956 free(m
->generator_unit_path
);
2957 m
->generator_unit_path
= NULL
;
2960 int manager_set_default_controllers(Manager
*m
, char **controllers
) {
2965 if (!(l
= strv_copy(controllers
)))
2968 strv_free(m
->default_controllers
);
2969 m
->default_controllers
= l
;
2974 void manager_recheck_syslog(Manager
*m
) {
2979 if (m
->running_as
!= MANAGER_SYSTEM
)
2982 if ((u
= manager_get_unit(m
, SPECIAL_SYSLOG_SOCKET
))) {
2985 state
= SOCKET(u
)->state
;
2987 if (state
!= SOCKET_DEAD
&&
2988 state
!= SOCKET_FAILED
&&
2989 state
!= SOCKET_RUNNING
) {
2991 /* Hmm, the socket is not set up, or is still
2992 * listening, let's better not try to use
2993 * it. Note that we have no problem if the
2994 * socket is completely down, since there
2995 * might be a foreign /dev/log socket around
2996 * and we want to make use of that.
3004 if ((u
= manager_get_unit(m
, SPECIAL_SYSLOG_TARGET
)))
3005 if (TARGET(u
)->state
!= TARGET_ACTIVE
) {
3010 /* Hmm, OK, so the socket is either fully up, or fully down,
3011 * and the target is up, then let's make use of the socket */
3015 static const char* const manager_running_as_table
[_MANAGER_RUNNING_AS_MAX
] = {
3016 [MANAGER_SYSTEM
] = "system",
3017 [MANAGER_USER
] = "user"
3020 DEFINE_STRING_TABLE_LOOKUP(manager_running_as
, ManagerRunningAs
);