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"
38 #include "unit-name.h"
39 #include "specifier.h"
40 #include "dbus-unit.h"
42 const UnitVTable
* const unit_vtable
[_UNIT_TYPE_MAX
] = {
43 [UNIT_SERVICE
] = &service_vtable
,
44 [UNIT_TIMER
] = &timer_vtable
,
45 [UNIT_SOCKET
] = &socket_vtable
,
46 [UNIT_TARGET
] = &target_vtable
,
47 [UNIT_DEVICE
] = &device_vtable
,
48 [UNIT_MOUNT
] = &mount_vtable
,
49 [UNIT_AUTOMOUNT
] = &automount_vtable
,
50 [UNIT_SNAPSHOT
] = &snapshot_vtable
,
51 [UNIT_SWAP
] = &swap_vtable
54 Unit
*unit_new(Manager
*m
) {
59 if (!(u
= new0(Unit
, 1)))
62 if (!(u
->meta
.names
= set_new(string_hash_func
, string_compare_func
))) {
68 u
->meta
.type
= _UNIT_TYPE_INVALID
;
73 bool unit_has_name(Unit
*u
, const char *name
) {
77 return !!set_get(u
->meta
.names
, (char*) name
);
80 int unit_add_name(Unit
*u
, const char *text
) {
82 char *s
= NULL
, *i
= NULL
;
88 if (unit_name_is_template(text
)) {
89 if (!u
->meta
.instance
)
92 s
= unit_name_replace_instance(text
, u
->meta
.instance
);
99 if (!unit_name_is_valid(s
)) {
104 assert_se((t
= unit_name_to_type(s
)) >= 0);
106 if (u
->meta
.type
!= _UNIT_TYPE_INVALID
&& t
!= u
->meta
.type
) {
111 if ((r
= unit_name_to_instance(s
, &i
)) < 0)
114 if (i
&& unit_vtable
[t
]->no_instances
)
117 if (u
->meta
.type
!= _UNIT_TYPE_INVALID
&& !streq_ptr(u
->meta
.instance
, i
)) {
122 if (unit_vtable
[t
]->no_alias
&&
123 !set_isempty(u
->meta
.names
) &&
124 !set_get(u
->meta
.names
, s
)) {
129 if (hashmap_size(u
->meta
.manager
->units
) >= MANAGER_MAX_NAMES
) {
134 if ((r
= set_put(u
->meta
.names
, s
)) < 0) {
140 if ((r
= hashmap_put(u
->meta
.manager
->units
, s
, u
)) < 0) {
141 set_remove(u
->meta
.names
, s
);
145 if (u
->meta
.type
== _UNIT_TYPE_INVALID
) {
149 u
->meta
.instance
= i
;
151 LIST_PREPEND(Meta
, units_per_type
, u
->meta
.manager
->units_per_type
[t
], &u
->meta
);
153 if (UNIT_VTABLE(u
)->init
)
154 UNIT_VTABLE(u
)->init(u
);
158 unit_add_to_dbus_queue(u
);
168 int unit_choose_id(Unit
*u
, const char *name
) {
174 if (unit_name_is_template(name
)) {
176 if (!u
->meta
.instance
)
179 if (!(t
= unit_name_replace_instance(name
, u
->meta
.instance
)))
185 /* Selects one of the names of this unit as the id */
186 s
= set_get(u
->meta
.names
, (char*) name
);
193 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 bool unit_check_gc(Unit
*u
) {
216 if (UNIT_VTABLE(u
)->no_gc
)
222 if (unit_active_state(u
) != UNIT_INACTIVE
)
225 if (UNIT_VTABLE(u
)->check_gc
)
226 if (UNIT_VTABLE(u
)->check_gc(u
))
232 void unit_add_to_load_queue(Unit
*u
) {
234 assert(u
->meta
.type
!= _UNIT_TYPE_INVALID
);
236 if (u
->meta
.load_state
!= UNIT_STUB
|| u
->meta
.in_load_queue
)
239 LIST_PREPEND(Meta
, load_queue
, u
->meta
.manager
->load_queue
, &u
->meta
);
240 u
->meta
.in_load_queue
= true;
243 void unit_add_to_cleanup_queue(Unit
*u
) {
246 if (u
->meta
.in_cleanup_queue
)
249 LIST_PREPEND(Meta
, cleanup_queue
, u
->meta
.manager
->cleanup_queue
, &u
->meta
);
250 u
->meta
.in_cleanup_queue
= true;
253 void unit_add_to_gc_queue(Unit
*u
) {
256 if (u
->meta
.in_gc_queue
|| u
->meta
.in_cleanup_queue
)
259 if (unit_check_gc(u
))
262 LIST_PREPEND(Meta
, gc_queue
, u
->meta
.manager
->gc_queue
, &u
->meta
);
263 u
->meta
.in_gc_queue
= true;
265 u
->meta
.manager
->n_in_gc_queue
++;
267 if (u
->meta
.manager
->gc_queue_timestamp
<= 0)
268 u
->meta
.manager
->gc_queue_timestamp
= now(CLOCK_MONOTONIC
);
271 void unit_add_to_dbus_queue(Unit
*u
) {
273 assert(u
->meta
.type
!= _UNIT_TYPE_INVALID
);
275 if (u
->meta
.load_state
== UNIT_STUB
|| u
->meta
.in_dbus_queue
|| set_isempty(u
->meta
.manager
->subscribed
))
278 LIST_PREPEND(Meta
, dbus_queue
, u
->meta
.manager
->dbus_unit_queue
, &u
->meta
);
279 u
->meta
.in_dbus_queue
= true;
282 static void bidi_set_free(Unit
*u
, Set
*s
) {
288 /* Frees the set and makes sure we are dropped from the
289 * inverse pointers */
291 SET_FOREACH(other
, s
, i
) {
294 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
295 set_remove(other
->meta
.dependencies
[d
], u
);
297 unit_add_to_gc_queue(other
);
303 void unit_free(Unit
*u
) {
310 bus_unit_send_removed_signal(u
);
312 /* Detach from next 'bigger' objects */
313 SET_FOREACH(t
, u
->meta
.names
, i
)
314 hashmap_remove_value(u
->meta
.manager
->units
, t
, u
);
316 if (u
->meta
.type
!= _UNIT_TYPE_INVALID
)
317 LIST_REMOVE(Meta
, units_per_type
, u
->meta
.manager
->units_per_type
[u
->meta
.type
], &u
->meta
);
319 if (u
->meta
.in_load_queue
)
320 LIST_REMOVE(Meta
, load_queue
, u
->meta
.manager
->load_queue
, &u
->meta
);
322 if (u
->meta
.in_dbus_queue
)
323 LIST_REMOVE(Meta
, dbus_queue
, u
->meta
.manager
->dbus_unit_queue
, &u
->meta
);
325 if (u
->meta
.in_cleanup_queue
)
326 LIST_REMOVE(Meta
, cleanup_queue
, u
->meta
.manager
->cleanup_queue
, &u
->meta
);
328 if (u
->meta
.in_gc_queue
) {
329 LIST_REMOVE(Meta
, gc_queue
, u
->meta
.manager
->gc_queue
, &u
->meta
);
330 u
->meta
.manager
->n_in_gc_queue
--;
333 /* Free data and next 'smaller' objects */
335 job_free(u
->meta
.job
);
337 if (u
->meta
.load_state
!= UNIT_STUB
)
338 if (UNIT_VTABLE(u
)->done
)
339 UNIT_VTABLE(u
)->done(u
);
341 cgroup_bonding_free_list(u
->meta
.cgroup_bondings
);
343 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
344 bidi_set_free(u
, u
->meta
.dependencies
[d
]);
346 free(u
->meta
.description
);
347 free(u
->meta
.fragment_path
);
349 while ((t
= set_steal_first(u
->meta
.names
)))
351 set_free(u
->meta
.names
);
353 free(u
->meta
.instance
);
358 UnitActiveState
unit_active_state(Unit
*u
) {
361 if (u
->meta
.load_state
!= UNIT_LOADED
)
362 return UNIT_INACTIVE
;
364 return UNIT_VTABLE(u
)->active_state(u
);
367 const char* unit_sub_state_to_string(Unit
*u
) {
370 return UNIT_VTABLE(u
)->sub_state_to_string(u
);
373 static void complete_move(Set
**s
, Set
**other
) {
381 set_move(*s
, *other
);
388 static void merge_names(Unit
*u
, Unit
*other
) {
395 complete_move(&u
->meta
.names
, &other
->meta
.names
);
397 while ((t
= set_steal_first(other
->meta
.names
)))
400 set_free(other
->meta
.names
);
401 other
->meta
.names
= NULL
;
402 other
->meta
.id
= NULL
;
404 SET_FOREACH(t
, u
->meta
.names
, i
)
405 assert_se(hashmap_replace(u
->meta
.manager
->units
, t
, u
) == 0);
408 static void merge_dependencies(Unit
*u
, Unit
*other
, UnitDependency d
) {
415 assert(d
< _UNIT_DEPENDENCY_MAX
);
417 SET_FOREACH(back
, other
->meta
.dependencies
[d
], i
) {
420 for (k
= 0; k
< _UNIT_DEPENDENCY_MAX
; k
++)
421 if ((r
= set_remove_and_put(back
->meta
.dependencies
[k
], other
, u
)) < 0) {
424 set_remove(back
->meta
.dependencies
[k
], other
);
426 assert(r
== -ENOENT
);
430 complete_move(&u
->meta
.dependencies
[d
], &other
->meta
.dependencies
[d
]);
432 set_free(other
->meta
.dependencies
[d
]);
433 other
->meta
.dependencies
[d
] = NULL
;
436 int unit_merge(Unit
*u
, Unit
*other
) {
441 assert(u
->meta
.manager
== other
->meta
.manager
);
442 assert(u
->meta
.type
!= _UNIT_TYPE_INVALID
);
444 other
= unit_follow_merge(other
);
449 if (u
->meta
.type
!= other
->meta
.type
)
452 if (!streq_ptr(u
->meta
.instance
, other
->meta
.instance
))
455 if (other
->meta
.load_state
!= UNIT_STUB
&&
456 other
->meta
.load_state
!= UNIT_FAILED
)
462 if (unit_active_state(other
) != UNIT_INACTIVE
)
466 merge_names(u
, other
);
468 /* Merge dependencies */
469 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
470 merge_dependencies(u
, other
, d
);
472 other
->meta
.load_state
= UNIT_MERGED
;
473 other
->meta
.merged_into
= u
;
475 /* If there is still some data attached to the other node, we
476 * don't need it anymore, and can free it. */
477 if (other
->meta
.load_state
!= UNIT_STUB
)
478 if (UNIT_VTABLE(other
)->done
)
479 UNIT_VTABLE(other
)->done(other
);
481 unit_add_to_dbus_queue(u
);
482 unit_add_to_cleanup_queue(other
);
487 int unit_merge_by_name(Unit
*u
, const char *name
) {
495 if (unit_name_is_template(name
)) {
496 if (!u
->meta
.instance
)
499 if (!(s
= unit_name_replace_instance(name
, u
->meta
.instance
)))
505 if (!(other
= manager_get_unit(u
->meta
.manager
, name
)))
506 r
= unit_add_name(u
, name
);
508 r
= unit_merge(u
, other
);
514 Unit
* unit_follow_merge(Unit
*u
) {
517 while (u
->meta
.load_state
== UNIT_MERGED
)
518 assert_se(u
= u
->meta
.merged_into
);
523 int unit_add_exec_dependencies(Unit
*u
, ExecContext
*c
) {
529 if (c
->std_output
!= EXEC_OUTPUT_KERNEL
&& c
->std_output
!= EXEC_OUTPUT_SYSLOG
)
532 /* If syslog or kernel logging is requested, make sure our own
533 * logging daemon is run first. */
535 if ((r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_LOGGER_SOCKET
, NULL
, true)) < 0)
538 if (u
->meta
.manager
->running_as
!= MANAGER_SESSION
)
539 if ((r
= unit_add_dependency_by_name(u
, UNIT_REQUIRES
, SPECIAL_LOGGER_SOCKET
, NULL
, true)) < 0)
545 const char *unit_description(Unit
*u
) {
548 if (u
->meta
.description
)
549 return u
->meta
.description
;
554 void unit_dump(Unit
*u
, FILE *f
, const char *prefix
) {
561 char timestamp1
[FORMAT_TIMESTAMP_MAX
], timestamp2
[FORMAT_TIMESTAMP_MAX
];
564 assert(u
->meta
.type
>= 0);
568 p2
= strappend(prefix
, "\t");
569 prefix2
= p2
? p2
: prefix
;
573 "%s\tDescription: %s\n"
575 "%s\tUnit Load State: %s\n"
576 "%s\tUnit Active State: %s\n"
577 "%s\tActive Enter Timestamp: %s\n"
578 "%s\tActive Exit Timestamp: %s\n"
579 "%s\tGC Check Good: %s\n",
581 prefix
, unit_description(u
),
582 prefix
, strna(u
->meta
.instance
),
583 prefix
, unit_load_state_to_string(u
->meta
.load_state
),
584 prefix
, unit_active_state_to_string(unit_active_state(u
)),
585 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->meta
.active_enter_timestamp
)),
586 prefix
, strna(format_timestamp(timestamp2
, sizeof(timestamp2
), u
->meta
.active_exit_timestamp
)),
587 prefix
, yes_no(unit_check_gc(u
)));
589 SET_FOREACH(t
, u
->meta
.names
, i
)
590 fprintf(f
, "%s\tName: %s\n", prefix
, t
);
592 if (u
->meta
.fragment_path
)
593 fprintf(f
, "%s\tFragment Path: %s\n", prefix
, u
->meta
.fragment_path
);
595 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
598 SET_FOREACH(other
, u
->meta
.dependencies
[d
], i
)
599 fprintf(f
, "%s\t%s: %s\n", prefix
, unit_dependency_to_string(d
), other
->meta
.id
);
602 if (u
->meta
.load_state
== UNIT_LOADED
) {
604 "%s\tRecursive Stop: %s\n"
605 "%s\tStop When Unneeded: %s\n",
606 prefix
, yes_no(u
->meta
.recursive_stop
),
607 prefix
, yes_no(u
->meta
.stop_when_unneeded
));
609 LIST_FOREACH(by_unit
, b
, u
->meta
.cgroup_bondings
)
610 fprintf(f
, "%s\tControlGroup: %s:%s\n",
611 prefix
, b
->controller
, b
->path
);
613 if (UNIT_VTABLE(u
)->dump
)
614 UNIT_VTABLE(u
)->dump(u
, f
, prefix2
);
616 } else if (u
->meta
.load_state
== UNIT_MERGED
)
618 "%s\tMerged into: %s\n",
619 prefix
, u
->meta
.merged_into
->meta
.id
);
622 job_dump(u
->meta
.job
, f
, prefix2
);
627 /* Common implementation for multiple backends */
628 int unit_load_fragment_and_dropin(Unit
*u
) {
633 /* Load a .service file */
634 if ((r
= unit_load_fragment(u
)) < 0)
637 if (u
->meta
.load_state
== UNIT_STUB
)
640 /* Load drop-in directory data */
641 if ((r
= unit_load_dropin(unit_follow_merge(u
))) < 0)
647 /* Common implementation for multiple backends */
648 int unit_load_fragment_and_dropin_optional(Unit
*u
) {
653 /* Same as unit_load_fragment_and_dropin(), but whether
654 * something can be loaded or not doesn't matter. */
656 /* Load a .service file */
657 if ((r
= unit_load_fragment(u
)) < 0)
660 if (u
->meta
.load_state
== UNIT_STUB
)
661 u
->meta
.load_state
= UNIT_LOADED
;
663 /* Load drop-in directory data */
664 if ((r
= unit_load_dropin(unit_follow_merge(u
))) < 0)
670 /* Common implementation for multiple backends */
671 int unit_load_nop(Unit
*u
) {
674 if (u
->meta
.load_state
== UNIT_STUB
)
675 u
->meta
.load_state
= UNIT_LOADED
;
680 int unit_load(Unit
*u
) {
685 if (u
->meta
.in_load_queue
) {
686 LIST_REMOVE(Meta
, load_queue
, u
->meta
.manager
->load_queue
, &u
->meta
);
687 u
->meta
.in_load_queue
= false;
690 if (u
->meta
.type
== _UNIT_TYPE_INVALID
)
693 if (u
->meta
.load_state
!= UNIT_STUB
)
696 if (UNIT_VTABLE(u
)->load
)
697 if ((r
= UNIT_VTABLE(u
)->load(u
)) < 0)
700 if (u
->meta
.load_state
== UNIT_STUB
) {
705 assert((u
->meta
.load_state
!= UNIT_MERGED
) == !u
->meta
.merged_into
);
707 unit_add_to_dbus_queue(unit_follow_merge(u
));
708 unit_add_to_gc_queue(u
);
713 u
->meta
.load_state
= UNIT_FAILED
;
714 unit_add_to_dbus_queue(u
);
716 log_error("Failed to load configuration for %s: %s", u
->meta
.id
, strerror(-r
));
722 * -EBADR: This unit type does not support starting.
723 * -EALREADY: Unit is already started.
724 * -EAGAIN: An operation is already in progress. Retry later.
726 int unit_start(Unit
*u
) {
727 UnitActiveState state
;
731 /* If this is already (being) started, then this will
732 * succeed. Note that this will even succeed if this unit is
733 * not startable by the user. This is relied on to detect when
734 * we need to wait for units and when waiting is finished. */
735 state
= unit_active_state(u
);
736 if (UNIT_IS_ACTIVE_OR_RELOADING(state
))
739 /* If it is stopped, but we cannot start it, then fail */
740 if (!UNIT_VTABLE(u
)->start
)
743 /* We don't suppress calls to ->start() here when we are
744 * already starting, to allow this request to be used as a
745 * "hurry up" call, for example when the unit is in some "auto
746 * restart" state where it waits for a holdoff timer to elapse
747 * before it will start again. */
749 unit_add_to_dbus_queue(u
);
750 return UNIT_VTABLE(u
)->start(u
);
753 bool unit_can_start(Unit
*u
) {
756 return !!UNIT_VTABLE(u
)->start
;
760 * -EBADR: This unit type does not support stopping.
761 * -EALREADY: Unit is already stopped.
762 * -EAGAIN: An operation is already in progress. Retry later.
764 int unit_stop(Unit
*u
) {
765 UnitActiveState state
;
769 state
= unit_active_state(u
);
770 if (state
== UNIT_INACTIVE
)
773 if (!UNIT_VTABLE(u
)->stop
)
776 unit_add_to_dbus_queue(u
);
777 return UNIT_VTABLE(u
)->stop(u
);
781 * -EBADR: This unit type does not support reloading.
782 * -ENOEXEC: Unit is not started.
783 * -EAGAIN: An operation is already in progress. Retry later.
785 int unit_reload(Unit
*u
) {
786 UnitActiveState state
;
790 if (!unit_can_reload(u
))
793 state
= unit_active_state(u
);
794 if (unit_active_state(u
) == UNIT_ACTIVE_RELOADING
)
797 if (unit_active_state(u
) != UNIT_ACTIVE
)
800 unit_add_to_dbus_queue(u
);
801 return UNIT_VTABLE(u
)->reload(u
);
804 bool unit_can_reload(Unit
*u
) {
807 if (!UNIT_VTABLE(u
)->reload
)
810 if (!UNIT_VTABLE(u
)->can_reload
)
813 return UNIT_VTABLE(u
)->can_reload(u
);
816 static void unit_check_uneeded(Unit
*u
) {
822 /* If this service shall be shut down when unneeded then do
825 if (!u
->meta
.stop_when_unneeded
)
828 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
831 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRED_BY
], i
)
832 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
835 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRED_BY_OVERRIDABLE
], i
)
836 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
839 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_WANTED_BY
], i
)
840 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
843 log_debug("Service %s is not needed anymore. Stopping.", u
->meta
.id
);
845 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
846 manager_add_job(u
->meta
.manager
, JOB_STOP
, u
, JOB_FAIL
, true, NULL
);
849 static void retroactively_start_dependencies(Unit
*u
) {
854 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)));
856 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRES
], i
)
857 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
858 manager_add_job(u
->meta
.manager
, JOB_START
, other
, JOB_REPLACE
, true, NULL
);
860 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRES_OVERRIDABLE
], i
)
861 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
862 manager_add_job(u
->meta
.manager
, JOB_START
, other
, JOB_FAIL
, false, NULL
);
864 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUISITE
], i
)
865 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
866 manager_add_job(u
->meta
.manager
, JOB_START
, other
, JOB_REPLACE
, true, NULL
);
868 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_WANTS
], i
)
869 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
870 manager_add_job(u
->meta
.manager
, JOB_START
, other
, JOB_FAIL
, false, NULL
);
872 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_CONFLICTS
], i
)
873 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
874 manager_add_job(u
->meta
.manager
, JOB_STOP
, other
, JOB_REPLACE
, true, NULL
);
877 static void retroactively_stop_dependencies(Unit
*u
) {
882 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
884 if (u
->meta
.recursive_stop
) {
885 /* Pull down units need us recursively if enabled */
886 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRED_BY
], i
)
887 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
888 manager_add_job(u
->meta
.manager
, JOB_STOP
, other
, JOB_REPLACE
, true, NULL
);
891 /* Garbage collect services that might not be needed anymore, if enabled */
892 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRES
], i
)
893 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
894 unit_check_uneeded(other
);
895 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRES_OVERRIDABLE
], i
)
896 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
897 unit_check_uneeded(other
);
898 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_WANTS
], i
)
899 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
900 unit_check_uneeded(other
);
901 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUISITE
], i
)
902 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
903 unit_check_uneeded(other
);
904 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUISITE_OVERRIDABLE
], i
)
905 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
906 unit_check_uneeded(other
);
909 void unit_notify(Unit
*u
, UnitActiveState os
, UnitActiveState ns
) {
910 bool unexpected
= false;
913 assert(os
< _UNIT_ACTIVE_STATE_MAX
);
914 assert(ns
< _UNIT_ACTIVE_STATE_MAX
);
916 /* Note that this is called for all low-level state changes,
917 * even if they might map to the same high-level
918 * UnitActiveState! That means that ns == os is OK an expected
919 * behaviour here. For example: if a mount point is remounted
920 * this function will be called too and the utmp code below
923 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
) && UNIT_IS_ACTIVE_OR_RELOADING(ns
))
924 u
->meta
.active_enter_timestamp
= now(CLOCK_REALTIME
);
925 else if (UNIT_IS_ACTIVE_OR_RELOADING(os
) && !UNIT_IS_ACTIVE_OR_RELOADING(ns
))
926 u
->meta
.active_exit_timestamp
= now(CLOCK_REALTIME
);
930 if (u
->meta
.job
->state
== JOB_WAITING
)
932 /* So we reached a different state for this
933 * job. Let's see if we can run it now if it
934 * failed previously due to EAGAIN. */
935 job_add_to_run_queue(u
->meta
.job
);
938 assert(u
->meta
.job
->state
== JOB_RUNNING
);
940 /* Let's check whether this state change
941 * constitutes a finished job, or maybe
942 * cotradicts a running job and hence needs to
943 * invalidate jobs. */
945 switch (u
->meta
.job
->type
) {
948 case JOB_VERIFY_ACTIVE
:
950 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
))
951 job_finish_and_invalidate(u
->meta
.job
, true);
952 else if (ns
!= UNIT_ACTIVATING
) {
954 job_finish_and_invalidate(u
->meta
.job
, false);
960 case JOB_RELOAD_OR_START
:
962 if (ns
== UNIT_ACTIVE
)
963 job_finish_and_invalidate(u
->meta
.job
, true);
964 else if (ns
!= UNIT_ACTIVATING
&& ns
!= UNIT_ACTIVE_RELOADING
) {
966 job_finish_and_invalidate(u
->meta
.job
, false);
973 case JOB_TRY_RESTART
:
975 if (ns
== UNIT_INACTIVE
)
976 job_finish_and_invalidate(u
->meta
.job
, true);
977 else if (ns
!= UNIT_DEACTIVATING
) {
979 job_finish_and_invalidate(u
->meta
.job
, false);
985 assert_not_reached("Job type unknown");
990 /* If this state change happened without being requested by a
991 * job, then let's retroactively start or stop dependencies */
994 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os
) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns
))
995 retroactively_start_dependencies(u
);
996 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os
) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
997 retroactively_stop_dependencies(u
);
1000 /* Some names are special */
1001 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
)) {
1002 if (unit_has_name(u
, SPECIAL_DBUS_SERVICE
)) {
1003 /* The bus just might have become available,
1004 * hence try to connect to it, if we aren't
1006 bus_init_system(u
->meta
.manager
);
1007 bus_init_api(u
->meta
.manager
);
1010 if (unit_has_name(u
, SPECIAL_SYSLOG_SERVICE
))
1011 /* The syslog daemon just might have become
1012 * available, hence try to connect to it, if
1013 * we aren't yet connected. */
1016 if (u
->meta
.type
== UNIT_MOUNT
)
1017 /* Another directory became available, let's
1018 * check if that is enough to write our utmp
1020 manager_write_utmp_reboot(u
->meta
.manager
);
1022 if (u
->meta
.type
== UNIT_TARGET
)
1023 /* A target got activated, maybe this is a runlevel? */
1024 manager_write_utmp_runlevel(u
->meta
.manager
, u
);
1026 } else if (!UNIT_IS_ACTIVE_OR_RELOADING(ns
)) {
1028 if (unit_has_name(u
, SPECIAL_SYSLOG_SERVICE
))
1029 /* The syslog daemon might just have
1030 * terminated, hence try to disconnect from
1034 /* We don't care about D-Bus here, since we'll get an
1035 * asynchronous notification for it anyway. */
1038 /* Maybe we finished startup and are now ready for being
1039 * stopped because unneeded? */
1040 unit_check_uneeded(u
);
1042 unit_add_to_dbus_queue(u
);
1043 unit_add_to_gc_queue(u
);
1046 int unit_watch_fd(Unit
*u
, int fd
, uint32_t events
, Watch
*w
) {
1047 struct epoll_event ev
;
1052 assert(w
->type
== WATCH_INVALID
|| (w
->type
== WATCH_FD
&& w
->fd
== fd
&& w
->data
.unit
== u
));
1058 if (epoll_ctl(u
->meta
.manager
->epoll_fd
,
1059 w
->type
== WATCH_INVALID
? EPOLL_CTL_ADD
: EPOLL_CTL_MOD
,
1071 void unit_unwatch_fd(Unit
*u
, Watch
*w
) {
1075 if (w
->type
== WATCH_INVALID
)
1078 assert(w
->type
== WATCH_FD
);
1079 assert(w
->data
.unit
== u
);
1080 assert_se(epoll_ctl(u
->meta
.manager
->epoll_fd
, EPOLL_CTL_DEL
, w
->fd
, NULL
) >= 0);
1083 w
->type
= WATCH_INVALID
;
1084 w
->data
.unit
= NULL
;
1087 int unit_watch_pid(Unit
*u
, pid_t pid
) {
1091 /* Watch a specific PID. We only support one unit watching
1092 * each PID for now. */
1094 return hashmap_put(u
->meta
.manager
->watch_pids
, UINT32_TO_PTR(pid
), u
);
1097 void unit_unwatch_pid(Unit
*u
, pid_t pid
) {
1101 hashmap_remove_value(u
->meta
.manager
->watch_pids
, UINT32_TO_PTR(pid
), u
);
1104 int unit_watch_timer(Unit
*u
, usec_t delay
, Watch
*w
) {
1105 struct itimerspec its
;
1111 assert(w
->type
== WATCH_INVALID
|| (w
->type
== WATCH_TIMER
&& w
->data
.unit
== u
));
1113 /* This will try to reuse the old timer if there is one */
1115 if (w
->type
== WATCH_TIMER
) {
1120 if ((fd
= timerfd_create(CLOCK_MONOTONIC
, TFD_NONBLOCK
|TFD_CLOEXEC
)) < 0)
1127 /* Set absolute time in the past, but not 0, since we
1128 * don't want to disarm the timer */
1129 its
.it_value
.tv_sec
= 0;
1130 its
.it_value
.tv_nsec
= 1;
1132 flags
= TFD_TIMER_ABSTIME
;
1134 timespec_store(&its
.it_value
, delay
);
1138 /* This will also flush the elapse counter */
1139 if (timerfd_settime(fd
, flags
, &its
, NULL
) < 0)
1142 if (w
->type
== WATCH_INVALID
) {
1143 struct epoll_event ev
;
1147 ev
.events
= EPOLLIN
;
1149 if (epoll_ctl(u
->meta
.manager
->epoll_fd
, EPOLL_CTL_ADD
, fd
, &ev
) < 0)
1154 w
->type
= WATCH_TIMER
;
1161 close_nointr_nofail(fd
);
1166 void unit_unwatch_timer(Unit
*u
, Watch
*w
) {
1170 if (w
->type
== WATCH_INVALID
)
1173 assert(w
->type
== WATCH_TIMER
&& w
->data
.unit
== u
);
1175 assert_se(epoll_ctl(u
->meta
.manager
->epoll_fd
, EPOLL_CTL_DEL
, w
->fd
, NULL
) >= 0);
1176 close_nointr_nofail(w
->fd
);
1179 w
->type
= WATCH_INVALID
;
1180 w
->data
.unit
= NULL
;
1183 bool unit_job_is_applicable(Unit
*u
, JobType j
) {
1185 assert(j
>= 0 && j
< _JOB_TYPE_MAX
);
1189 case JOB_VERIFY_ACTIVE
:
1195 case JOB_TRY_RESTART
:
1196 return unit_can_start(u
);
1199 return unit_can_reload(u
);
1201 case JOB_RELOAD_OR_START
:
1202 return unit_can_reload(u
) && unit_can_start(u
);
1205 assert_not_reached("Invalid job type");
1209 int unit_add_dependency(Unit
*u
, UnitDependency d
, Unit
*other
, bool add_reference
) {
1211 static const UnitDependency inverse_table
[_UNIT_DEPENDENCY_MAX
] = {
1212 [UNIT_REQUIRES
] = UNIT_REQUIRED_BY
,
1213 [UNIT_REQUIRES_OVERRIDABLE
] = UNIT_REQUIRED_BY_OVERRIDABLE
,
1214 [UNIT_WANTS
] = UNIT_WANTED_BY
,
1215 [UNIT_REQUISITE
] = UNIT_REQUIRED_BY
,
1216 [UNIT_REQUISITE_OVERRIDABLE
] = UNIT_REQUIRED_BY_OVERRIDABLE
,
1217 [UNIT_REQUIRED_BY
] = _UNIT_DEPENDENCY_INVALID
,
1218 [UNIT_REQUIRED_BY_OVERRIDABLE
] = _UNIT_DEPENDENCY_INVALID
,
1219 [UNIT_WANTED_BY
] = _UNIT_DEPENDENCY_INVALID
,
1220 [UNIT_CONFLICTS
] = UNIT_CONFLICTS
,
1221 [UNIT_BEFORE
] = UNIT_AFTER
,
1222 [UNIT_AFTER
] = UNIT_BEFORE
,
1223 [UNIT_REFERENCES
] = UNIT_REFERENCED_BY
,
1224 [UNIT_REFERENCED_BY
] = UNIT_REFERENCES
1226 int r
, q
= 0, v
= 0, w
= 0;
1229 assert(d
>= 0 && d
< _UNIT_DEPENDENCY_MAX
);
1230 assert(inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
);
1233 /* We won't allow dependencies on ourselves. We will not
1234 * consider them an error however. */
1238 if (UNIT_VTABLE(u
)->no_requires
&&
1239 (d
== UNIT_REQUIRES
||
1240 d
== UNIT_REQUIRES_OVERRIDABLE
||
1241 d
== UNIT_REQUISITE
||
1242 d
== UNIT_REQUISITE_OVERRIDABLE
)) {
1246 if ((r
= set_ensure_allocated(&u
->meta
.dependencies
[d
], trivial_hash_func
, trivial_compare_func
)) < 0 ||
1247 (r
= set_ensure_allocated(&other
->meta
.dependencies
[inverse_table
[d
]], trivial_hash_func
, trivial_compare_func
)) < 0)
1251 if ((r
= set_ensure_allocated(&u
->meta
.dependencies
[UNIT_REFERENCES
], trivial_hash_func
, trivial_compare_func
)) < 0 ||
1252 (r
= set_ensure_allocated(&other
->meta
.dependencies
[UNIT_REFERENCED_BY
], trivial_hash_func
, trivial_compare_func
)) < 0)
1255 if ((q
= set_put(u
->meta
.dependencies
[d
], other
)) < 0)
1258 if ((v
= set_put(other
->meta
.dependencies
[inverse_table
[d
]], u
)) < 0) {
1263 if (add_reference
) {
1264 if ((w
= set_put(u
->meta
.dependencies
[UNIT_REFERENCES
], other
)) < 0) {
1269 if ((r
= set_put(other
->meta
.dependencies
[UNIT_REFERENCED_BY
], u
)) < 0)
1273 unit_add_to_dbus_queue(u
);
1278 set_remove(u
->meta
.dependencies
[d
], other
);
1281 set_remove(other
->meta
.dependencies
[inverse_table
[d
]], u
);
1284 set_remove(u
->meta
.dependencies
[UNIT_REFERENCES
], other
);
1289 static const char *resolve_template(Unit
*u
, const char *name
, const char*path
, char **p
) {
1293 assert(name
|| path
);
1296 name
= file_name_from_path(path
);
1298 if (!unit_name_is_template(name
)) {
1303 if (u
->meta
.instance
)
1304 s
= unit_name_replace_instance(name
, u
->meta
.instance
);
1308 if (!(i
= unit_name_to_prefix(u
->meta
.id
)))
1311 s
= unit_name_replace_instance(name
, i
);
1322 int unit_add_dependency_by_name(Unit
*u
, UnitDependency d
, const char *name
, const char *path
, bool add_reference
) {
1328 assert(name
|| path
);
1330 if (!(name
= resolve_template(u
, name
, path
, &s
)))
1333 if ((r
= manager_load_unit(u
->meta
.manager
, name
, path
, &other
)) < 0)
1336 r
= unit_add_dependency(u
, d
, other
, add_reference
);
1343 int unit_add_dependency_by_name_inverse(Unit
*u
, UnitDependency d
, const char *name
, const char *path
, bool add_reference
) {
1349 assert(name
|| path
);
1351 if (!(name
= resolve_template(u
, name
, path
, &s
)))
1354 if ((r
= manager_load_unit(u
->meta
.manager
, name
, path
, &other
)) < 0)
1357 r
= unit_add_dependency(other
, d
, u
, add_reference
);
1364 int set_unit_path(const char *p
) {
1368 /* This is mostly for debug purposes */
1370 if (path_is_absolute(p
)) {
1371 if (!(c
= strdup(p
)))
1374 if (!(cwd
= get_current_dir_name()))
1377 r
= asprintf(&c
, "%s/%s", cwd
, p
);
1384 if (setenv("SYSTEMD_UNIT_PATH", c
, 0) < 0) {
1393 char *unit_dbus_path(Unit
*u
) {
1398 if (!(e
= bus_path_escape(u
->meta
.id
)))
1401 if (asprintf(&p
, "/org/freedesktop/systemd1/unit/%s", e
) < 0) {
1410 int unit_add_cgroup(Unit
*u
, CGroupBonding
*b
) {
1418 /* Ensure this hasn't been added yet */
1421 l
= hashmap_get(u
->meta
.manager
->cgroup_bondings
, b
->path
);
1422 LIST_PREPEND(CGroupBonding
, by_path
, l
, b
);
1424 if ((r
= hashmap_replace(u
->meta
.manager
->cgroup_bondings
, b
->path
, l
)) < 0) {
1425 LIST_REMOVE(CGroupBonding
, by_path
, l
, b
);
1429 LIST_PREPEND(CGroupBonding
, by_unit
, u
->meta
.cgroup_bondings
, b
);
1435 static char *default_cgroup_path(Unit
*u
) {
1441 if (u
->meta
.instance
) {
1444 if (!(t
= unit_name_template(u
->meta
.id
)))
1447 r
= asprintf(&p
, "%s/%s/%s", u
->meta
.manager
->cgroup_hierarchy
, t
, u
->meta
.instance
);
1450 r
= asprintf(&p
, "%s/%s", u
->meta
.manager
->cgroup_hierarchy
, u
->meta
.id
);
1452 return r
< 0 ? NULL
: p
;
1455 int unit_add_cgroup_from_text(Unit
*u
, const char *name
) {
1457 char *controller
= NULL
, *path
= NULL
;
1458 CGroupBonding
*b
= NULL
;
1464 /* Detect controller name */
1465 n
= strcspn(name
, ":");
1468 (name
[n
] == ':' && name
[n
+1] == 0)) {
1470 /* Only controller name, no path? */
1472 if (!(path
= default_cgroup_path(u
)))
1478 /* Controller name, and path. */
1481 if (!path_is_absolute(p
))
1484 if (!(path
= strdup(p
)))
1489 controller
= strndup(name
, n
);
1491 controller
= strdup(u
->meta
.manager
->cgroup_controller
);
1498 if (cgroup_bonding_find_list(u
->meta
.cgroup_bondings
, controller
)) {
1503 if (!(b
= new0(CGroupBonding
, 1))) {
1508 b
->controller
= controller
;
1511 b
->clean_up
= false;
1513 if ((r
= unit_add_cgroup(u
, b
)) < 0)
1526 int unit_add_default_cgroup(Unit
*u
) {
1532 /* Adds in the default cgroup data, if it wasn't specified yet */
1534 if (unit_get_default_cgroup(u
))
1537 if (!(b
= new0(CGroupBonding
, 1)))
1540 if (!(b
->controller
= strdup(u
->meta
.manager
->cgroup_controller
)))
1543 if (!(b
->path
= default_cgroup_path(u
)))
1549 if ((r
= unit_add_cgroup(u
, b
)) < 0)
1556 free(b
->controller
);
1562 CGroupBonding
* unit_get_default_cgroup(Unit
*u
) {
1565 return cgroup_bonding_find_list(u
->meta
.cgroup_bondings
, u
->meta
.manager
->cgroup_controller
);
1568 int unit_load_related_unit(Unit
*u
, const char *type
, Unit
**_found
) {
1576 if (!(t
= unit_name_change_suffix(u
->meta
.id
, type
)))
1579 assert(!unit_has_name(u
, t
));
1581 r
= manager_load_unit(u
->meta
.manager
, t
, NULL
, _found
);
1584 assert(r
< 0 || *_found
!= u
);
1589 int unit_get_related_unit(Unit
*u
, const char *type
, Unit
**_found
) {
1597 if (!(t
= unit_name_change_suffix(u
->meta
.id
, type
)))
1600 assert(!unit_has_name(u
, t
));
1602 found
= manager_get_unit(u
->meta
.manager
, t
);
1612 static char *specifier_prefix_and_instance(char specifier
, void *data
, void *userdata
) {
1616 return unit_name_to_prefix_and_instance(u
->meta
.id
);
1619 static char *specifier_prefix(char specifier
, void *data
, void *userdata
) {
1623 return unit_name_to_prefix(u
->meta
.id
);
1626 static char *specifier_prefix_unescaped(char specifier
, void *data
, void *userdata
) {
1632 if (!(p
= unit_name_to_prefix(u
->meta
.id
)))
1635 r
= unit_name_unescape(p
);
1641 static char *specifier_instance_unescaped(char specifier
, void *data
, void *userdata
) {
1645 if (u
->meta
.instance
)
1646 return unit_name_unescape(u
->meta
.instance
);
1651 char *unit_name_printf(Unit
*u
, const char* format
) {
1654 * This will use the passed string as format string and
1655 * replace the following specifiers:
1657 * %n: the full id of the unit (foo@bar.waldo)
1658 * %N: the id of the unit without the suffix (foo@bar)
1659 * %p: the prefix (foo)
1660 * %i: the instance (bar)
1663 const Specifier table
[] = {
1664 { 'n', specifier_string
, u
->meta
.id
},
1665 { 'N', specifier_prefix_and_instance
, NULL
},
1666 { 'p', specifier_prefix
, NULL
},
1667 { 'i', specifier_string
, u
->meta
.instance
},
1674 return specifier_printf(format
, table
, u
);
1677 char *unit_full_printf(Unit
*u
, const char *format
) {
1679 /* This is similar to unit_name_printf() but also supports
1682 const Specifier table
[] = {
1683 { 'n', specifier_string
, u
->meta
.id
},
1684 { 'N', specifier_prefix_and_instance
, NULL
},
1685 { 'p', specifier_prefix
, NULL
},
1686 { 'P', specifier_prefix_unescaped
, NULL
},
1687 { 'i', specifier_string
, u
->meta
.instance
},
1688 { 'I', specifier_instance_unescaped
, NULL
},
1695 return specifier_printf(format
, table
, u
);
1698 char **unit_full_printf_strv(Unit
*u
, char **l
) {
1702 /* Applies unit_full_printf to every entry in l */
1707 if (!(r
= new(char*, n
+1)))
1710 for (i
= l
, j
= r
; *i
; i
++, j
++)
1711 if (!(*j
= unit_full_printf(u
, *i
)))
1727 int unit_watch_bus_name(Unit
*u
, const char *name
) {
1731 /* Watch a specific name on the bus. We only support one unit
1732 * watching each name for now. */
1734 return hashmap_put(u
->meta
.manager
->watch_bus
, name
, u
);
1737 void unit_unwatch_bus_name(Unit
*u
, const char *name
) {
1741 hashmap_remove_value(u
->meta
.manager
->watch_bus
, name
, u
);
1744 bool unit_can_serialize(Unit
*u
) {
1747 return UNIT_VTABLE(u
)->serialize
&& UNIT_VTABLE(u
)->deserialize_item
;
1750 int unit_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
1757 if (!unit_can_serialize(u
))
1760 if ((r
= UNIT_VTABLE(u
)->serialize(u
, f
, fds
)) < 0)
1768 void unit_serialize_item_format(Unit
*u
, FILE *f
, const char *key
, const char *format
, ...) {
1779 va_start(ap
, format
);
1780 vfprintf(f
, format
, ap
);
1786 void unit_serialize_item(Unit
*u
, FILE *f
, const char *key
, const char *value
) {
1792 fprintf(f
, "%s=%s\n", key
, value
);
1795 int unit_deserialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
1802 if (!unit_can_serialize(u
))
1806 char line
[1024], *l
, *v
;
1809 if (!fgets(line
, sizeof(line
), f
)) {
1821 k
= strcspn(l
, "=");
1829 if ((r
= UNIT_VTABLE(u
)->deserialize_item(u
, l
, v
, fds
)) < 0)
1835 static const char* const unit_type_table
[_UNIT_TYPE_MAX
] = {
1836 [UNIT_SERVICE
] = "service",
1837 [UNIT_TIMER
] = "timer",
1838 [UNIT_SOCKET
] = "socket",
1839 [UNIT_TARGET
] = "target",
1840 [UNIT_DEVICE
] = "device",
1841 [UNIT_MOUNT
] = "mount",
1842 [UNIT_AUTOMOUNT
] = "automount",
1843 [UNIT_SNAPSHOT
] = "snapshot",
1844 [UNIT_SWAP
] = "swap"
1847 DEFINE_STRING_TABLE_LOOKUP(unit_type
, UnitType
);
1849 static const char* const unit_load_state_table
[_UNIT_LOAD_STATE_MAX
] = {
1850 [UNIT_STUB
] = "stub",
1851 [UNIT_LOADED
] = "loaded",
1852 [UNIT_FAILED
] = "failed",
1853 [UNIT_MERGED
] = "merged"
1856 DEFINE_STRING_TABLE_LOOKUP(unit_load_state
, UnitLoadState
);
1858 static const char* const unit_active_state_table
[_UNIT_ACTIVE_STATE_MAX
] = {
1859 [UNIT_ACTIVE
] = "active",
1860 [UNIT_INACTIVE
] = "inactive",
1861 [UNIT_ACTIVATING
] = "activating",
1862 [UNIT_DEACTIVATING
] = "deactivating"
1865 DEFINE_STRING_TABLE_LOOKUP(unit_active_state
, UnitActiveState
);
1867 static const char* const unit_dependency_table
[_UNIT_DEPENDENCY_MAX
] = {
1868 [UNIT_REQUIRES
] = "Requires",
1869 [UNIT_REQUIRES_OVERRIDABLE
] = "RequiresOverridable",
1870 [UNIT_WANTS
] = "Wants",
1871 [UNIT_REQUISITE
] = "Requisite",
1872 [UNIT_REQUISITE_OVERRIDABLE
] = "RequisiteOverridable",
1873 [UNIT_REQUIRED_BY
] = "RequiredBy",
1874 [UNIT_REQUIRED_BY_OVERRIDABLE
] = "RequiredByOverridable",
1875 [UNIT_WANTED_BY
] = "WantedBy",
1876 [UNIT_CONFLICTS
] = "Conflicts",
1877 [UNIT_BEFORE
] = "Before",
1878 [UNIT_AFTER
] = "After",
1879 [UNIT_REFERENCES
] = "References",
1880 [UNIT_REFERENCED_BY
] = "ReferencedBy"
1883 DEFINE_STRING_TABLE_LOOKUP(unit_dependency
, UnitDependency
);
1885 static const char* const kill_mode_table
[_KILL_MODE_MAX
] = {
1886 [KILL_CONTROL_GROUP
] = "control-group",
1887 [KILL_PROCESS_GROUP
] = "process-group",
1888 [KILL_PROCESS
] = "process",
1889 [KILL_NONE
] = "none"
1892 DEFINE_STRING_TABLE_LOOKUP(kill_mode
, KillMode
);