1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/epoll.h>
26 #include <sys/timerfd.h>
35 #include "load-fragment.h"
36 #include "load-dropin.h"
39 const UnitVTable
* const unit_vtable
[_UNIT_TYPE_MAX
] = {
40 [UNIT_SERVICE
] = &service_vtable
,
41 [UNIT_TIMER
] = &timer_vtable
,
42 [UNIT_SOCKET
] = &socket_vtable
,
43 [UNIT_TARGET
] = &target_vtable
,
44 [UNIT_DEVICE
] = &device_vtable
,
45 [UNIT_MOUNT
] = &mount_vtable
,
46 [UNIT_AUTOMOUNT
] = &automount_vtable
,
47 [UNIT_SNAPSHOT
] = &snapshot_vtable
50 UnitType
unit_name_to_type(const char *n
) {
55 for (t
= 0; t
< _UNIT_TYPE_MAX
; t
++)
56 if (endswith(n
, unit_vtable
[t
]->suffix
))
59 return _UNIT_TYPE_INVALID
;
64 "abcdefghijklmnopqrstuvwxyz" \
65 "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
68 bool unit_name_is_valid(const char *n
) {
74 if (strlen(n
) >= UNIT_NAME_MAX
)
77 t
= unit_name_to_type(n
);
78 if (t
< 0 || t
>= _UNIT_TYPE_MAX
)
81 if (!(e
= strrchr(n
, '.')))
87 for (i
= n
; i
< e
; i
++)
88 if (!strchr(VALID_CHARS
, *i
))
94 char *unit_name_change_suffix(const char *n
, const char *suffix
) {
99 assert(unit_name_is_valid(n
));
102 assert_se(e
= strrchr(n
, '.'));
106 if (!(r
= new(char, a
+ b
+ 1)))
110 memcpy(r
+a
, suffix
, b
+1);
115 Unit
*unit_new(Manager
*m
) {
120 if (!(u
= new0(Unit
, 1)))
123 if (!(u
->meta
.names
= set_new(string_hash_func
, string_compare_func
))) {
129 u
->meta
.type
= _UNIT_TYPE_INVALID
;
134 int unit_add_name(Unit
*u
, const char *text
) {
142 if (!unit_name_is_valid(text
))
145 if ((t
= unit_name_to_type(text
)) == _UNIT_TYPE_INVALID
)
148 if (u
->meta
.type
!= _UNIT_TYPE_INVALID
&& t
!= u
->meta
.type
)
151 if (!(s
= strdup(text
)))
154 if ((r
= set_put(u
->meta
.names
, s
)) < 0) {
163 if ((r
= hashmap_put(u
->meta
.manager
->units
, s
, u
)) < 0) {
164 set_remove(u
->meta
.names
, s
);
169 if (u
->meta
.type
== _UNIT_TYPE_INVALID
)
170 LIST_PREPEND(Meta
, units_per_type
, u
->meta
.manager
->units_per_type
[t
], &u
->meta
);
177 unit_add_to_dbus_queue(u
);
181 int unit_choose_id(Unit
*u
, const char *name
) {
187 /* Selects one of the names of this unit as the id */
189 if (!(s
= set_get(u
->meta
.names
, (char*) name
)))
194 unit_add_to_dbus_queue(u
);
198 int unit_set_description(Unit
*u
, const char *description
) {
203 if (!(s
= strdup(description
)))
206 free(u
->meta
.description
);
207 u
->meta
.description
= s
;
209 unit_add_to_dbus_queue(u
);
213 void unit_add_to_load_queue(Unit
*u
) {
216 if (u
->meta
.load_state
!= UNIT_STUB
|| u
->meta
.in_load_queue
)
219 LIST_PREPEND(Meta
, load_queue
, u
->meta
.manager
->load_queue
, &u
->meta
);
220 u
->meta
.in_load_queue
= true;
223 void unit_add_to_dbus_queue(Unit
*u
) {
226 if (u
->meta
.load_state
== UNIT_STUB
|| u
->meta
.in_dbus_queue
|| set_isempty(u
->meta
.manager
->subscribed
))
229 LIST_PREPEND(Meta
, dbus_queue
, u
->meta
.manager
->dbus_unit_queue
, &u
->meta
);
230 u
->meta
.in_dbus_queue
= true;
233 static void bidi_set_free(Unit
*u
, Set
*s
) {
239 /* Frees the set and makes sure we are dropped from the
240 * inverse pointers */
242 SET_FOREACH(other
, s
, i
) {
245 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
246 set_remove(other
->meta
.dependencies
[d
], u
);
252 void unit_free(Unit
*u
) {
259 bus_unit_send_removed_signal(u
);
261 /* Detach from next 'bigger' objects */
263 cgroup_bonding_free_list(u
->meta
.cgroup_bondings
);
265 SET_FOREACH(t
, u
->meta
.names
, i
)
266 hashmap_remove_value(u
->meta
.manager
->units
, t
, u
);
268 if (u
->meta
.type
!= _UNIT_TYPE_INVALID
)
269 LIST_REMOVE(Meta
, units_per_type
, u
->meta
.manager
->units_per_type
[u
->meta
.type
], &u
->meta
);
271 if (u
->meta
.in_load_queue
)
272 LIST_REMOVE(Meta
, load_queue
, u
->meta
.manager
->load_queue
, &u
->meta
);
274 if (u
->meta
.in_dbus_queue
)
275 LIST_REMOVE(Meta
, dbus_queue
, u
->meta
.manager
->dbus_unit_queue
, &u
->meta
);
277 if (u
->meta
.load_state
== UNIT_LOADED
)
278 if (UNIT_VTABLE(u
)->done
)
279 UNIT_VTABLE(u
)->done(u
);
281 /* Free data and next 'smaller' objects */
283 job_free(u
->meta
.job
);
285 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
286 bidi_set_free(u
, u
->meta
.dependencies
[d
]);
288 free(u
->meta
.description
);
289 free(u
->meta
.fragment_path
);
291 while ((t
= set_steal_first(u
->meta
.names
)))
293 set_free(u
->meta
.names
);
298 UnitActiveState
unit_active_state(Unit
*u
) {
301 if (u
->meta
.load_state
!= UNIT_LOADED
)
302 return UNIT_INACTIVE
;
304 return UNIT_VTABLE(u
)->active_state(u
);
307 static int ensure_merge(Set
**s
, Set
*other
) {
313 return set_merge(*s
, other
);
315 if (!(*s
= set_copy(other
)))
321 /* FIXME: Does not rollback on failure! Needs to fix special unit
322 * pointers. Needs to merge names and dependencies properly.*/
323 int unit_merge(Unit
*u
, Unit
*other
) {
329 assert(u
->meta
.manager
== other
->meta
.manager
);
331 /* This merges 'other' into 'unit'. FIXME: This does not
332 * rollback on failure. */
334 if (u
->meta
.type
!= u
->meta
.type
)
337 if (u
->meta
.load_state
!= UNIT_STUB
)
341 if ((r
= ensure_merge(&u
->meta
.names
, other
->meta
.names
)) < 0)
344 /* Merge dependencies */
345 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
346 /* fixme, the inverse mapping is missing */
347 if ((r
= ensure_merge(&u
->meta
.dependencies
[d
], other
->meta
.dependencies
[d
])) < 0)
350 unit_add_to_dbus_queue(u
);
355 const char* unit_id(Unit
*u
) {
361 return set_first(u
->meta
.names
);
364 const char *unit_description(Unit
*u
) {
367 if (u
->meta
.description
)
368 return u
->meta
.description
;
373 void unit_dump(Unit
*u
, FILE *f
, const char *prefix
) {
385 p2
= strappend(prefix
, "\t");
386 prefix2
= p2
? p2
: prefix
;
390 "%s\tDescription: %s\n"
391 "%s\tUnit Load State: %s\n"
392 "%s\tUnit Active State: %s\n"
393 "%s\tRecursive Stop: %s\n"
394 "%s\tStop When Unneeded: %s\n",
396 prefix
, unit_description(u
),
397 prefix
, unit_load_state_to_string(u
->meta
.load_state
),
398 prefix
, unit_active_state_to_string(unit_active_state(u
)),
399 prefix
, yes_no(u
->meta
.recursive_stop
),
400 prefix
, yes_no(u
->meta
.stop_when_unneeded
));
402 if (u
->meta
.fragment_path
)
403 fprintf(f
, "%s\tFragment Path: %s\n", prefix
, u
->meta
.fragment_path
);
405 SET_FOREACH(t
, u
->meta
.names
, i
)
406 fprintf(f
, "%s\tName: %s\n", prefix
, t
);
408 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
411 if (set_isempty(u
->meta
.dependencies
[d
]))
414 SET_FOREACH(other
, u
->meta
.dependencies
[d
], i
)
415 fprintf(f
, "%s\t%s: %s\n", prefix
, unit_dependency_to_string(d
), unit_id(other
));
418 LIST_FOREACH(by_unit
, b
, u
->meta
.cgroup_bondings
)
419 fprintf(f
, "%s\tControlGroup: %s:%s\n",
420 prefix
, b
->controller
, b
->path
);
422 if (UNIT_VTABLE(u
)->dump
)
423 UNIT_VTABLE(u
)->dump(u
, f
, prefix2
);
426 job_dump(u
->meta
.job
, f
, prefix2
);
431 /* Common implementation for multiple backends */
432 int unit_load_fragment_and_dropin(Unit
*u
) {
437 /* Load a .socket file */
438 if ((r
= unit_load_fragment(u
)) < 0)
443 /* Load drop-in directory data */
444 if ((r
= unit_load_dropin(u
)) < 0)
450 int unit_load(Unit
*u
) {
455 if (u
->meta
.in_load_queue
) {
456 LIST_REMOVE(Meta
, load_queue
, u
->meta
.manager
->load_queue
, &u
->meta
);
457 u
->meta
.in_load_queue
= false;
460 if (u
->meta
.load_state
!= UNIT_STUB
)
463 if (UNIT_VTABLE(u
)->init
)
464 if ((r
= UNIT_VTABLE(u
)->init(u
)) < 0)
467 u
->meta
.load_state
= UNIT_LOADED
;
468 unit_add_to_dbus_queue(u
);
472 u
->meta
.load_state
= UNIT_FAILED
;
473 unit_add_to_dbus_queue(u
);
478 * -EBADR: This unit type does not support starting.
479 * -EALREADY: Unit is already started.
480 * -EAGAIN: An operation is already in progress. Retry later.
482 int unit_start(Unit
*u
) {
483 UnitActiveState state
;
487 /* If this is already (being) started, then this will
488 * succeed. Note that this will even succeed if this unit is
489 * not startable by the user. This is relied on to detect when
490 * we need to wait for units and when waiting is finished. */
491 state
= unit_active_state(u
);
492 if (UNIT_IS_ACTIVE_OR_RELOADING(state
))
495 /* If it is stopped, but we cannot start it, then fail */
496 if (!UNIT_VTABLE(u
)->start
)
499 /* We don't suppress calls to ->start() here when we are
500 * already starting, to allow this request to be used as a
501 * "hurry up" call, for example when the unit is in some "auto
502 * restart" state where it waits for a holdoff timer to elapse
503 * before it will start again. */
505 unit_add_to_dbus_queue(u
);
506 return UNIT_VTABLE(u
)->start(u
);
509 bool unit_can_start(Unit
*u
) {
512 return !!UNIT_VTABLE(u
)->start
;
516 * -EBADR: This unit type does not support stopping.
517 * -EALREADY: Unit is already stopped.
518 * -EAGAIN: An operation is already in progress. Retry later.
520 int unit_stop(Unit
*u
) {
521 UnitActiveState state
;
525 state
= unit_active_state(u
);
526 if (state
== UNIT_INACTIVE
)
529 if (!UNIT_VTABLE(u
)->stop
)
532 if (state
== UNIT_DEACTIVATING
)
535 unit_add_to_dbus_queue(u
);
536 return UNIT_VTABLE(u
)->stop(u
);
540 * -EBADR: This unit type does not support reloading.
541 * -ENOEXEC: Unit is not started.
542 * -EAGAIN: An operation is already in progress. Retry later.
544 int unit_reload(Unit
*u
) {
545 UnitActiveState state
;
549 if (!unit_can_reload(u
))
552 state
= unit_active_state(u
);
553 if (unit_active_state(u
) == UNIT_ACTIVE_RELOADING
)
556 if (unit_active_state(u
) != UNIT_ACTIVE
)
559 unit_add_to_dbus_queue(u
);
560 return UNIT_VTABLE(u
)->reload(u
);
563 bool unit_can_reload(Unit
*u
) {
566 if (!UNIT_VTABLE(u
)->reload
)
569 if (!UNIT_VTABLE(u
)->can_reload
)
572 return UNIT_VTABLE(u
)->can_reload(u
);
575 static void unit_check_uneeded(Unit
*u
) {
581 /* If this service shall be shut down when unneeded then do
584 if (!u
->meta
.stop_when_unneeded
)
587 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
590 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRED_BY
], i
)
591 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
594 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_SOFT_REQUIRED_BY
], i
)
595 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
598 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_WANTED_BY
], i
)
599 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
602 log_debug("Service %s is not needed anymore. Stopping.", unit_id(u
));
604 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
605 manager_add_job(u
->meta
.manager
, JOB_STOP
, u
, JOB_FAIL
, true, NULL
);
608 static void retroactively_start_dependencies(Unit
*u
) {
613 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)));
615 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRES
], i
)
616 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
617 manager_add_job(u
->meta
.manager
, JOB_START
, other
, JOB_REPLACE
, true, NULL
);
619 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_SOFT_REQUIRES
], i
)
620 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
621 manager_add_job(u
->meta
.manager
, JOB_START
, other
, JOB_FAIL
, false, NULL
);
623 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUISITE
], i
)
624 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
625 manager_add_job(u
->meta
.manager
, JOB_START
, other
, JOB_REPLACE
, true, NULL
);
627 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_WANTS
], i
)
628 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
629 manager_add_job(u
->meta
.manager
, JOB_START
, other
, JOB_FAIL
, false, NULL
);
631 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_CONFLICTS
], i
)
632 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
633 manager_add_job(u
->meta
.manager
, JOB_STOP
, other
, JOB_REPLACE
, true, NULL
);
636 static void retroactively_stop_dependencies(Unit
*u
) {
641 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
643 if (u
->meta
.recursive_stop
) {
644 /* Pull down units need us recursively if enabled */
645 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRED_BY
], i
)
646 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
647 manager_add_job(u
->meta
.manager
, JOB_STOP
, other
, JOB_REPLACE
, true, NULL
);
650 /* Garbage collect services that might not be needed anymore, if enabled */
651 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRES
], i
)
652 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
653 unit_check_uneeded(other
);
654 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_SOFT_REQUIRES
], i
)
655 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
656 unit_check_uneeded(other
);
657 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_WANTS
], i
)
658 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
659 unit_check_uneeded(other
);
660 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUISITE
], i
)
661 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
662 unit_check_uneeded(other
);
663 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_SOFT_REQUISITE
], i
)
664 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
665 unit_check_uneeded(other
);
668 void unit_notify(Unit
*u
, UnitActiveState os
, UnitActiveState ns
) {
670 assert(os
< _UNIT_ACTIVE_STATE_MAX
);
671 assert(ns
< _UNIT_ACTIVE_STATE_MAX
);
672 assert(!(os
== UNIT_ACTIVE
&& ns
== UNIT_ACTIVATING
));
673 assert(!(os
== UNIT_INACTIVE
&& ns
== UNIT_DEACTIVATING
));
678 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
) && UNIT_IS_ACTIVE_OR_RELOADING(ns
))
679 u
->meta
.active_enter_timestamp
= now(CLOCK_REALTIME
);
680 else if (UNIT_IS_ACTIVE_OR_RELOADING(os
) && !UNIT_IS_ACTIVE_OR_RELOADING(ns
))
681 u
->meta
.active_exit_timestamp
= now(CLOCK_REALTIME
);
685 if (u
->meta
.job
->state
== JOB_WAITING
)
687 /* So we reached a different state for this
688 * job. Let's see if we can run it now if it
689 * failed previously due to EAGAIN. */
690 job_add_to_run_queue(u
->meta
.job
);
693 assert(u
->meta
.job
->state
== JOB_RUNNING
);
695 /* Let's check whether this state change
696 * constitutes a finished job, or maybe
697 * cotradicts a running job and hence needs to
698 * invalidate jobs. */
700 switch (u
->meta
.job
->type
) {
703 case JOB_VERIFY_ACTIVE
:
705 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
)) {
706 job_finish_and_invalidate(u
->meta
.job
, true);
708 } else if (ns
== UNIT_ACTIVATING
)
711 job_finish_and_invalidate(u
->meta
.job
, false);
716 case JOB_RELOAD_OR_START
:
718 if (ns
== UNIT_ACTIVE
) {
719 job_finish_and_invalidate(u
->meta
.job
, true);
721 } else if (ns
== UNIT_ACTIVATING
|| ns
== UNIT_ACTIVE_RELOADING
)
724 job_finish_and_invalidate(u
->meta
.job
, false);
730 case JOB_TRY_RESTART
:
732 if (ns
== UNIT_INACTIVE
) {
733 job_finish_and_invalidate(u
->meta
.job
, true);
735 } else if (ns
== UNIT_DEACTIVATING
)
738 job_finish_and_invalidate(u
->meta
.job
, false);
743 assert_not_reached("Job type unknown");
748 /* If this state change happened without being requested by a
749 * job, then let's retroactively start or stop dependencies */
751 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os
) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns
))
752 retroactively_start_dependencies(u
);
753 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os
) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
754 retroactively_stop_dependencies(u
);
756 /* Maybe we finished startup and are now ready for being
757 * stopped because unneeded? */
758 unit_check_uneeded(u
);
760 unit_add_to_dbus_queue(u
);
763 int unit_watch_fd(Unit
*u
, int fd
, uint32_t events
, Watch
*w
) {
764 struct epoll_event ev
;
769 assert(w
->type
== WATCH_INVALID
|| (w
->type
== WATCH_FD
&& w
->fd
== fd
&& w
->data
.unit
== u
));
775 if (epoll_ctl(u
->meta
.manager
->epoll_fd
,
776 w
->type
== WATCH_INVALID
? EPOLL_CTL_ADD
: EPOLL_CTL_MOD
,
788 void unit_unwatch_fd(Unit
*u
, Watch
*w
) {
792 if (w
->type
== WATCH_INVALID
)
795 assert(w
->type
== WATCH_FD
);
796 assert(w
->data
.unit
== u
);
797 assert_se(epoll_ctl(u
->meta
.manager
->epoll_fd
, EPOLL_CTL_DEL
, w
->fd
, NULL
) >= 0);
800 w
->type
= WATCH_INVALID
;
804 int unit_watch_pid(Unit
*u
, pid_t pid
) {
808 return hashmap_put(u
->meta
.manager
->watch_pids
, UINT32_TO_PTR(pid
), u
);
811 void unit_unwatch_pid(Unit
*u
, pid_t pid
) {
815 hashmap_remove(u
->meta
.manager
->watch_pids
, UINT32_TO_PTR(pid
));
818 int unit_watch_timer(Unit
*u
, usec_t delay
, Watch
*w
) {
819 struct itimerspec its
;
825 assert(w
->type
== WATCH_INVALID
|| (w
->type
== WATCH_TIMER
&& w
->data
.unit
== u
));
827 /* This will try to reuse the old timer if there is one */
829 if (w
->type
== WATCH_TIMER
) {
834 if ((fd
= timerfd_create(CLOCK_MONOTONIC
, TFD_NONBLOCK
|TFD_CLOEXEC
)) < 0)
841 /* Set absolute time in the past, but not 0, since we
842 * don't want to disarm the timer */
843 its
.it_value
.tv_sec
= 0;
844 its
.it_value
.tv_nsec
= 1;
846 flags
= TFD_TIMER_ABSTIME
;
848 timespec_store(&its
.it_value
, delay
);
852 /* This will also flush the elapse counter */
853 if (timerfd_settime(fd
, flags
, &its
, NULL
) < 0)
856 if (w
->type
== WATCH_INVALID
) {
857 struct epoll_event ev
;
863 if (epoll_ctl(u
->meta
.manager
->epoll_fd
, EPOLL_CTL_ADD
, fd
, &ev
) < 0)
868 w
->type
= WATCH_TIMER
;
875 close_nointr_nofail(fd
);
880 void unit_unwatch_timer(Unit
*u
, Watch
*w
) {
884 if (w
->type
== WATCH_INVALID
)
887 assert(w
->type
== WATCH_TIMER
&& w
->data
.unit
== u
);
889 assert_se(epoll_ctl(u
->meta
.manager
->epoll_fd
, EPOLL_CTL_DEL
, w
->fd
, NULL
) >= 0);
890 assert_se(close_nointr(w
->fd
) == 0);
893 w
->type
= WATCH_INVALID
;
897 bool unit_job_is_applicable(Unit
*u
, JobType j
) {
899 assert(j
>= 0 && j
< _JOB_TYPE_MAX
);
903 case JOB_VERIFY_ACTIVE
:
909 case JOB_TRY_RESTART
:
910 return unit_can_start(u
);
913 return unit_can_reload(u
);
915 case JOB_RELOAD_OR_START
:
916 return unit_can_reload(u
) && unit_can_start(u
);
919 assert_not_reached("Invalid job type");
923 int unit_add_dependency(Unit
*u
, UnitDependency d
, Unit
*other
) {
925 static const UnitDependency inverse_table
[_UNIT_DEPENDENCY_MAX
] = {
926 [UNIT_REQUIRES
] = UNIT_REQUIRED_BY
,
927 [UNIT_SOFT_REQUIRES
] = UNIT_SOFT_REQUIRED_BY
,
928 [UNIT_WANTS
] = UNIT_WANTED_BY
,
929 [UNIT_REQUISITE
] = UNIT_REQUIRED_BY
,
930 [UNIT_SOFT_REQUISITE
] = UNIT_SOFT_REQUIRED_BY
,
931 [UNIT_REQUIRED_BY
] = _UNIT_DEPENDENCY_INVALID
,
932 [UNIT_SOFT_REQUIRED_BY
] = _UNIT_DEPENDENCY_INVALID
,
933 [UNIT_WANTED_BY
] = _UNIT_DEPENDENCY_INVALID
,
934 [UNIT_CONFLICTS
] = UNIT_CONFLICTS
,
935 [UNIT_BEFORE
] = UNIT_AFTER
,
936 [UNIT_AFTER
] = UNIT_BEFORE
941 assert(d
>= 0 && d
< _UNIT_DEPENDENCY_MAX
);
942 assert(inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
);
945 /* We won't allow dependencies on ourselves. We will not
946 * consider them an error however. */
950 if ((r
= set_ensure_allocated(&u
->meta
.dependencies
[d
], trivial_hash_func
, trivial_compare_func
)) < 0)
953 if ((r
= set_ensure_allocated(&other
->meta
.dependencies
[inverse_table
[d
]], trivial_hash_func
, trivial_compare_func
)) < 0)
956 if ((r
= set_put(u
->meta
.dependencies
[d
], other
)) < 0)
959 if ((r
= set_put(other
->meta
.dependencies
[inverse_table
[d
]], u
)) < 0) {
960 set_remove(u
->meta
.dependencies
[d
], other
);
964 unit_add_to_dbus_queue(u
);
968 int unit_add_dependency_by_name(Unit
*u
, UnitDependency d
, const char *name
) {
972 if ((r
= manager_load_unit(u
->meta
.manager
, name
, &other
)) < 0)
975 if ((r
= unit_add_dependency(u
, d
, other
)) < 0)
981 int set_unit_path(const char *p
) {
985 /* This is mostly for debug purposes */
987 if (path_is_absolute(p
)) {
988 if (!(c
= strdup(p
)))
991 if (!(cwd
= get_current_dir_name()))
994 r
= asprintf(&c
, "%s/%s", cwd
, p
);
1001 if (setenv("SYSTEMD_UNIT_PATH", c
, 0) < 0) {
1010 char *unit_name_escape_path(const char *path
, const char *suffix
) {
1017 /* Takes a path and a suffix and prefix and makes a nice
1018 * string suitable as unit name of it, escaping all weird
1021 * / becomes ., and all chars not alloweed in a unit name get
1022 * escaped as \xFF, including \ and ., of course. This
1023 * escaping is hence reversible.
1032 if (!(r
= new(char, a
*4+b
+1)))
1035 for (f
= path
, t
= r
; *f
; f
++) {
1038 else if (*f
== '.' || *f
== '\\' || !strchr(VALID_CHARS
, *f
)) {
1041 *(t
++) = hexchar(*f
> 4);
1042 *(t
++) = hexchar(*f
);
1047 memcpy(t
, suffix
, b
+1);
1052 char *unit_dbus_path(Unit
*u
) {
1057 if (!(e
= bus_path_escape(unit_id(u
))))
1060 if (asprintf(&p
, "/org/freedesktop/systemd1/unit/%s", e
) < 0) {
1069 int unit_add_cgroup(Unit
*u
, CGroupBonding
*b
) {
1077 /* Ensure this hasn't been added yet */
1080 l
= hashmap_get(u
->meta
.manager
->cgroup_bondings
, b
->path
);
1081 LIST_PREPEND(CGroupBonding
, by_path
, l
, b
);
1083 if ((r
= hashmap_replace(u
->meta
.manager
->cgroup_bondings
, b
->path
, l
)) < 0) {
1084 LIST_REMOVE(CGroupBonding
, by_path
, l
, b
);
1088 LIST_PREPEND(CGroupBonding
, by_unit
, u
->meta
.cgroup_bondings
, b
);
1094 int unit_add_cgroup_from_text(Unit
*u
, const char *name
) {
1104 /* Detect controller name */
1105 n
= strcspn(name
, ":/");
1107 /* Only controller name, no path? No path? */
1119 /* Insist in absolute paths */
1123 if (!(controller
= strndup(name
, n
)))
1126 if (cgroup_bonding_find_list(u
->meta
.cgroup_bondings
, controller
)) {
1131 if (!(b
= new0(CGroupBonding
, 1))) {
1136 b
->controller
= controller
;
1138 if (!(b
->path
= strdup(p
))) {
1144 b
->clean_up
= false;
1146 if ((r
= unit_add_cgroup(u
, b
)) < 0)
1153 free(b
->controller
);
1159 int unit_add_default_cgroup(Unit
*u
) {
1165 /* Adds in the default cgroup data, if it wasn't specified yet */
1167 if (unit_get_default_cgroup(u
))
1170 if (!(b
= new0(CGroupBonding
, 1)))
1173 if (!(b
->controller
= strdup(u
->meta
.manager
->cgroup_controller
)))
1176 if (asprintf(&b
->path
, "%s/%s", u
->meta
.manager
->cgroup_hierarchy
, unit_id(u
)) < 0)
1182 if ((r
= unit_add_cgroup(u
, b
)) < 0)
1189 free(b
->controller
);
1195 CGroupBonding
* unit_get_default_cgroup(Unit
*u
) {
1198 return cgroup_bonding_find_list(u
->meta
.cgroup_bondings
, u
->meta
.manager
->cgroup_controller
);
1201 static const char* const unit_type_table
[_UNIT_TYPE_MAX
] = {
1202 [UNIT_SERVICE
] = "service",
1203 [UNIT_TIMER
] = "timer",
1204 [UNIT_SOCKET
] = "socket",
1205 [UNIT_TARGET
] = "target",
1206 [UNIT_DEVICE
] = "device",
1207 [UNIT_MOUNT
] = "mount",
1208 [UNIT_AUTOMOUNT
] = "automount",
1209 [UNIT_SNAPSHOT
] = "snapshot"
1212 DEFINE_STRING_TABLE_LOOKUP(unit_type
, UnitType
);
1214 static const char* const unit_load_state_table
[_UNIT_LOAD_STATE_MAX
] = {
1215 [UNIT_STUB
] = "stub",
1216 [UNIT_LOADED
] = "loaded",
1217 [UNIT_FAILED
] = "failed"
1220 DEFINE_STRING_TABLE_LOOKUP(unit_load_state
, UnitLoadState
);
1222 static const char* const unit_active_state_table
[_UNIT_ACTIVE_STATE_MAX
] = {
1223 [UNIT_ACTIVE
] = "active",
1224 [UNIT_INACTIVE
] = "inactive",
1225 [UNIT_ACTIVATING
] = "activating",
1226 [UNIT_DEACTIVATING
] = "deactivating"
1229 DEFINE_STRING_TABLE_LOOKUP(unit_active_state
, UnitActiveState
);
1231 static const char* const unit_dependency_table
[_UNIT_DEPENDENCY_MAX
] = {
1232 [UNIT_REQUIRES
] = "Requires",
1233 [UNIT_SOFT_REQUIRES
] = "SoftRequires",
1234 [UNIT_WANTS
] = "Wants",
1235 [UNIT_REQUISITE
] = "Requisite",
1236 [UNIT_SOFT_REQUISITE
] = "SoftRequisite",
1237 [UNIT_REQUIRED_BY
] = "RequiredBy",
1238 [UNIT_SOFT_REQUIRED_BY
] = "SoftRequiredBy",
1239 [UNIT_WANTED_BY
] = "WantedBy",
1240 [UNIT_CONFLICTS
] = "Conflicts",
1241 [UNIT_BEFORE
] = "Before",
1242 [UNIT_AFTER
] = "After",
1245 DEFINE_STRING_TABLE_LOOKUP(unit_dependency
, UnitDependency
);