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"
43 const UnitVTable
* const unit_vtable
[_UNIT_TYPE_MAX
] = {
44 [UNIT_SERVICE
] = &service_vtable
,
45 [UNIT_TIMER
] = &timer_vtable
,
46 [UNIT_SOCKET
] = &socket_vtable
,
47 [UNIT_TARGET
] = &target_vtable
,
48 [UNIT_DEVICE
] = &device_vtable
,
49 [UNIT_MOUNT
] = &mount_vtable
,
50 [UNIT_AUTOMOUNT
] = &automount_vtable
,
51 [UNIT_SNAPSHOT
] = &snapshot_vtable
,
52 [UNIT_SWAP
] = &swap_vtable
,
53 [UNIT_PATH
] = &path_vtable
56 Unit
*unit_new(Manager
*m
) {
61 if (!(u
= new0(Unit
, 1)))
64 if (!(u
->meta
.names
= set_new(string_hash_func
, string_compare_func
))) {
70 u
->meta
.type
= _UNIT_TYPE_INVALID
;
71 u
->meta
.deserialized_job
= _JOB_TYPE_INVALID
;
72 u
->meta
.default_dependencies
= true;
77 bool unit_has_name(Unit
*u
, const char *name
) {
81 return !!set_get(u
->meta
.names
, (char*) name
);
84 int unit_add_name(Unit
*u
, const char *text
) {
86 char *s
= NULL
, *i
= NULL
;
92 if (unit_name_is_template(text
)) {
93 if (!u
->meta
.instance
)
96 s
= unit_name_replace_instance(text
, u
->meta
.instance
);
103 if (!unit_name_is_valid(s
)) {
108 assert_se((t
= unit_name_to_type(s
)) >= 0);
110 if (u
->meta
.type
!= _UNIT_TYPE_INVALID
&& t
!= u
->meta
.type
) {
115 if ((r
= unit_name_to_instance(s
, &i
)) < 0)
118 if (i
&& unit_vtable
[t
]->no_instances
)
121 if (u
->meta
.type
!= _UNIT_TYPE_INVALID
&& !streq_ptr(u
->meta
.instance
, i
)) {
126 if (unit_vtable
[t
]->no_alias
&&
127 !set_isempty(u
->meta
.names
) &&
128 !set_get(u
->meta
.names
, s
)) {
133 if (hashmap_size(u
->meta
.manager
->units
) >= MANAGER_MAX_NAMES
) {
138 if ((r
= set_put(u
->meta
.names
, s
)) < 0) {
144 if ((r
= hashmap_put(u
->meta
.manager
->units
, s
, u
)) < 0) {
145 set_remove(u
->meta
.names
, s
);
149 if (u
->meta
.type
== _UNIT_TYPE_INVALID
) {
153 u
->meta
.instance
= i
;
155 LIST_PREPEND(Meta
, units_per_type
, u
->meta
.manager
->units_per_type
[t
], &u
->meta
);
157 if (UNIT_VTABLE(u
)->init
)
158 UNIT_VTABLE(u
)->init(u
);
162 unit_add_to_dbus_queue(u
);
172 int unit_choose_id(Unit
*u
, const char *name
) {
178 if (unit_name_is_template(name
)) {
180 if (!u
->meta
.instance
)
183 if (!(t
= unit_name_replace_instance(name
, u
->meta
.instance
)))
189 /* Selects one of the names of this unit as the id */
190 s
= set_get(u
->meta
.names
, (char*) name
);
197 unit_add_to_dbus_queue(u
);
202 int unit_set_description(Unit
*u
, const char *description
) {
207 if (!(s
= strdup(description
)))
210 free(u
->meta
.description
);
211 u
->meta
.description
= s
;
213 unit_add_to_dbus_queue(u
);
217 bool unit_check_gc(Unit
*u
) {
220 if (u
->meta
.load_state
== UNIT_STUB
)
223 if (UNIT_VTABLE(u
)->no_gc
)
229 if (unit_active_state(u
) != UNIT_INACTIVE
)
232 if (UNIT_VTABLE(u
)->check_gc
)
233 if (UNIT_VTABLE(u
)->check_gc(u
))
239 void unit_add_to_load_queue(Unit
*u
) {
241 assert(u
->meta
.type
!= _UNIT_TYPE_INVALID
);
243 if (u
->meta
.load_state
!= UNIT_STUB
|| u
->meta
.in_load_queue
)
246 LIST_PREPEND(Meta
, load_queue
, u
->meta
.manager
->load_queue
, &u
->meta
);
247 u
->meta
.in_load_queue
= true;
250 void unit_add_to_cleanup_queue(Unit
*u
) {
253 if (u
->meta
.in_cleanup_queue
)
256 LIST_PREPEND(Meta
, cleanup_queue
, u
->meta
.manager
->cleanup_queue
, &u
->meta
);
257 u
->meta
.in_cleanup_queue
= true;
260 void unit_add_to_gc_queue(Unit
*u
) {
263 if (u
->meta
.in_gc_queue
|| u
->meta
.in_cleanup_queue
)
266 if (unit_check_gc(u
))
269 LIST_PREPEND(Meta
, gc_queue
, u
->meta
.manager
->gc_queue
, &u
->meta
);
270 u
->meta
.in_gc_queue
= true;
272 u
->meta
.manager
->n_in_gc_queue
++;
274 if (u
->meta
.manager
->gc_queue_timestamp
<= 0)
275 u
->meta
.manager
->gc_queue_timestamp
= now(CLOCK_MONOTONIC
);
278 void unit_add_to_dbus_queue(Unit
*u
) {
280 assert(u
->meta
.type
!= _UNIT_TYPE_INVALID
);
282 if (u
->meta
.load_state
== UNIT_STUB
|| u
->meta
.in_dbus_queue
)
285 /* Shortcut things if nobody cares */
286 if (!bus_has_subscriber(u
->meta
.manager
)) {
287 u
->meta
.sent_dbus_new_signal
= true;
291 LIST_PREPEND(Meta
, dbus_queue
, u
->meta
.manager
->dbus_unit_queue
, &u
->meta
);
292 u
->meta
.in_dbus_queue
= true;
295 static void bidi_set_free(Unit
*u
, Set
*s
) {
301 /* Frees the set and makes sure we are dropped from the
302 * inverse pointers */
304 SET_FOREACH(other
, s
, i
) {
307 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
308 set_remove(other
->meta
.dependencies
[d
], u
);
310 unit_add_to_gc_queue(other
);
316 void unit_free(Unit
*u
) {
323 bus_unit_send_removed_signal(u
);
325 if (u
->meta
.load_state
!= UNIT_STUB
)
326 if (UNIT_VTABLE(u
)->done
)
327 UNIT_VTABLE(u
)->done(u
);
329 SET_FOREACH(t
, u
->meta
.names
, i
)
330 hashmap_remove_value(u
->meta
.manager
->units
, t
, u
);
333 job_free(u
->meta
.job
);
335 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
336 bidi_set_free(u
, u
->meta
.dependencies
[d
]);
338 if (u
->meta
.type
!= _UNIT_TYPE_INVALID
)
339 LIST_REMOVE(Meta
, units_per_type
, u
->meta
.manager
->units_per_type
[u
->meta
.type
], &u
->meta
);
341 if (u
->meta
.in_load_queue
)
342 LIST_REMOVE(Meta
, load_queue
, u
->meta
.manager
->load_queue
, &u
->meta
);
344 if (u
->meta
.in_dbus_queue
)
345 LIST_REMOVE(Meta
, dbus_queue
, u
->meta
.manager
->dbus_unit_queue
, &u
->meta
);
347 if (u
->meta
.in_cleanup_queue
)
348 LIST_REMOVE(Meta
, cleanup_queue
, u
->meta
.manager
->cleanup_queue
, &u
->meta
);
350 if (u
->meta
.in_gc_queue
) {
351 LIST_REMOVE(Meta
, gc_queue
, u
->meta
.manager
->gc_queue
, &u
->meta
);
352 u
->meta
.manager
->n_in_gc_queue
--;
355 cgroup_bonding_free_list(u
->meta
.cgroup_bondings
);
357 free(u
->meta
.description
);
358 free(u
->meta
.fragment_path
);
360 set_free_free(u
->meta
.names
);
362 free(u
->meta
.instance
);
367 UnitActiveState
unit_active_state(Unit
*u
) {
370 if (u
->meta
.load_state
== UNIT_MERGED
)
371 return unit_active_state(unit_follow_merge(u
));
373 /* After a reload it might happen that a unit is not correctly
374 * loaded but still has a process around. That's why we won't
375 * shortcut failed loading to UNIT_INACTIVE_MAINTENANCE. */
377 return UNIT_VTABLE(u
)->active_state(u
);
380 const char* unit_sub_state_to_string(Unit
*u
) {
383 return UNIT_VTABLE(u
)->sub_state_to_string(u
);
386 static void complete_move(Set
**s
, Set
**other
) {
394 set_move(*s
, *other
);
401 static void merge_names(Unit
*u
, Unit
*other
) {
408 complete_move(&u
->meta
.names
, &other
->meta
.names
);
410 set_free_free(other
->meta
.names
);
411 other
->meta
.names
= NULL
;
412 other
->meta
.id
= NULL
;
414 SET_FOREACH(t
, u
->meta
.names
, i
)
415 assert_se(hashmap_replace(u
->meta
.manager
->units
, t
, u
) == 0);
418 static void merge_dependencies(Unit
*u
, Unit
*other
, UnitDependency d
) {
425 assert(d
< _UNIT_DEPENDENCY_MAX
);
427 SET_FOREACH(back
, other
->meta
.dependencies
[d
], i
) {
430 for (k
= 0; k
< _UNIT_DEPENDENCY_MAX
; k
++)
431 if ((r
= set_remove_and_put(back
->meta
.dependencies
[k
], other
, u
)) < 0) {
434 set_remove(back
->meta
.dependencies
[k
], other
);
436 assert(r
== -ENOENT
);
440 complete_move(&u
->meta
.dependencies
[d
], &other
->meta
.dependencies
[d
]);
442 set_free(other
->meta
.dependencies
[d
]);
443 other
->meta
.dependencies
[d
] = NULL
;
446 int unit_merge(Unit
*u
, Unit
*other
) {
451 assert(u
->meta
.manager
== other
->meta
.manager
);
452 assert(u
->meta
.type
!= _UNIT_TYPE_INVALID
);
454 other
= unit_follow_merge(other
);
459 if (u
->meta
.type
!= other
->meta
.type
)
462 if (!streq_ptr(u
->meta
.instance
, other
->meta
.instance
))
465 if (other
->meta
.load_state
!= UNIT_STUB
&&
466 other
->meta
.load_state
!= UNIT_FAILED
)
472 if (!UNIT_IS_INACTIVE_OR_MAINTENANCE(unit_active_state(other
)))
476 merge_names(u
, other
);
478 /* Merge dependencies */
479 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
480 merge_dependencies(u
, other
, d
);
482 other
->meta
.load_state
= UNIT_MERGED
;
483 other
->meta
.merged_into
= u
;
485 /* If there is still some data attached to the other node, we
486 * don't need it anymore, and can free it. */
487 if (other
->meta
.load_state
!= UNIT_STUB
)
488 if (UNIT_VTABLE(other
)->done
)
489 UNIT_VTABLE(other
)->done(other
);
491 unit_add_to_dbus_queue(u
);
492 unit_add_to_cleanup_queue(other
);
497 int unit_merge_by_name(Unit
*u
, const char *name
) {
505 if (unit_name_is_template(name
)) {
506 if (!u
->meta
.instance
)
509 if (!(s
= unit_name_replace_instance(name
, u
->meta
.instance
)))
515 if (!(other
= manager_get_unit(u
->meta
.manager
, name
)))
516 r
= unit_add_name(u
, name
);
518 r
= unit_merge(u
, other
);
524 Unit
* unit_follow_merge(Unit
*u
) {
527 while (u
->meta
.load_state
== UNIT_MERGED
)
528 assert_se(u
= u
->meta
.merged_into
);
533 int unit_add_exec_dependencies(Unit
*u
, ExecContext
*c
) {
539 if (c
->std_output
!= EXEC_OUTPUT_KMSG
&&
540 c
->std_output
!= EXEC_OUTPUT_SYSLOG
&&
541 c
->std_error
!= EXEC_OUTPUT_KMSG
&&
542 c
->std_error
!= EXEC_OUTPUT_SYSLOG
)
545 /* If syslog or kernel logging is requested, make sure our own
546 * logging daemon is run first. */
548 if ((r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_LOGGER_SOCKET
, NULL
, true)) < 0)
551 if (u
->meta
.manager
->running_as
== MANAGER_SYSTEM
)
552 if ((r
= unit_add_dependency_by_name(u
, UNIT_REQUIRES
, SPECIAL_LOGGER_SOCKET
, NULL
, true)) < 0)
558 const char *unit_description(Unit
*u
) {
561 if (u
->meta
.description
)
562 return u
->meta
.description
;
567 void unit_dump(Unit
*u
, FILE *f
, const char *prefix
) {
575 timestamp1
[FORMAT_TIMESTAMP_MAX
],
576 timestamp2
[FORMAT_TIMESTAMP_MAX
],
577 timestamp3
[FORMAT_TIMESTAMP_MAX
],
578 timestamp4
[FORMAT_TIMESTAMP_MAX
];
581 assert(u
->meta
.type
>= 0);
585 p2
= strappend(prefix
, "\t");
586 prefix2
= p2
? p2
: prefix
;
590 "%s\tDescription: %s\n"
592 "%s\tUnit Load State: %s\n"
593 "%s\tUnit Active State: %s\n"
594 "%s\tInactive Exit Timestamp: %s\n"
595 "%s\tActive Enter Timestamp: %s\n"
596 "%s\tActive Exit Timestamp: %s\n"
597 "%s\tInactive Enter Timestamp: %s\n"
598 "%s\tGC Check Good: %s\n",
600 prefix
, unit_description(u
),
601 prefix
, strna(u
->meta
.instance
),
602 prefix
, unit_load_state_to_string(u
->meta
.load_state
),
603 prefix
, unit_active_state_to_string(unit_active_state(u
)),
604 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->meta
.inactive_exit_timestamp
.realtime
)),
605 prefix
, strna(format_timestamp(timestamp2
, sizeof(timestamp2
), u
->meta
.active_enter_timestamp
.realtime
)),
606 prefix
, strna(format_timestamp(timestamp3
, sizeof(timestamp3
), u
->meta
.active_exit_timestamp
.realtime
)),
607 prefix
, strna(format_timestamp(timestamp4
, sizeof(timestamp4
), u
->meta
.inactive_enter_timestamp
.realtime
)),
608 prefix
, yes_no(unit_check_gc(u
)));
610 SET_FOREACH(t
, u
->meta
.names
, i
)
611 fprintf(f
, "%s\tName: %s\n", prefix
, t
);
613 if (u
->meta
.fragment_path
)
614 fprintf(f
, "%s\tFragment Path: %s\n", prefix
, u
->meta
.fragment_path
);
616 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
619 SET_FOREACH(other
, u
->meta
.dependencies
[d
], i
)
620 fprintf(f
, "%s\t%s: %s\n", prefix
, unit_dependency_to_string(d
), other
->meta
.id
);
623 if (u
->meta
.load_state
== UNIT_LOADED
) {
625 "%s\tRecursive Stop: %s\n"
626 "%s\tStopWhenUnneeded: %s\n"
627 "%s\tOnlyByDependency: %s\n"
628 "%s\tDefaultDependencies: %s\n",
629 prefix
, yes_no(u
->meta
.recursive_stop
),
630 prefix
, yes_no(u
->meta
.stop_when_unneeded
),
631 prefix
, yes_no(u
->meta
.only_by_dependency
),
632 prefix
, yes_no(u
->meta
.default_dependencies
));
634 LIST_FOREACH(by_unit
, b
, u
->meta
.cgroup_bondings
)
635 fprintf(f
, "%s\tControlGroup: %s:%s\n",
636 prefix
, b
->controller
, b
->path
);
638 if (UNIT_VTABLE(u
)->dump
)
639 UNIT_VTABLE(u
)->dump(u
, f
, prefix2
);
641 } else if (u
->meta
.load_state
== UNIT_MERGED
)
643 "%s\tMerged into: %s\n",
644 prefix
, u
->meta
.merged_into
->meta
.id
);
647 job_dump(u
->meta
.job
, f
, prefix2
);
652 /* Common implementation for multiple backends */
653 int unit_load_fragment_and_dropin(Unit
*u
) {
658 /* Load a .service file */
659 if ((r
= unit_load_fragment(u
)) < 0)
662 if (u
->meta
.load_state
== UNIT_STUB
)
665 /* Load drop-in directory data */
666 if ((r
= unit_load_dropin(unit_follow_merge(u
))) < 0)
672 /* Common implementation for multiple backends */
673 int unit_load_fragment_and_dropin_optional(Unit
*u
) {
678 /* Same as unit_load_fragment_and_dropin(), but whether
679 * something can be loaded or not doesn't matter. */
681 /* Load a .service file */
682 if ((r
= unit_load_fragment(u
)) < 0)
685 if (u
->meta
.load_state
== UNIT_STUB
)
686 u
->meta
.load_state
= UNIT_LOADED
;
688 /* Load drop-in directory data */
689 if ((r
= unit_load_dropin(unit_follow_merge(u
))) < 0)
695 /* Common implementation for multiple backends */
696 int unit_load_nop(Unit
*u
) {
699 if (u
->meta
.load_state
== UNIT_STUB
)
700 u
->meta
.load_state
= UNIT_LOADED
;
705 int unit_load(Unit
*u
) {
710 if (u
->meta
.in_load_queue
) {
711 LIST_REMOVE(Meta
, load_queue
, u
->meta
.manager
->load_queue
, &u
->meta
);
712 u
->meta
.in_load_queue
= false;
715 if (u
->meta
.type
== _UNIT_TYPE_INVALID
)
718 if (u
->meta
.load_state
!= UNIT_STUB
)
721 if (UNIT_VTABLE(u
)->load
)
722 if ((r
= UNIT_VTABLE(u
)->load(u
)) < 0)
725 if (u
->meta
.load_state
== UNIT_STUB
) {
730 assert((u
->meta
.load_state
!= UNIT_MERGED
) == !u
->meta
.merged_into
);
732 unit_add_to_dbus_queue(unit_follow_merge(u
));
733 unit_add_to_gc_queue(u
);
738 u
->meta
.load_state
= UNIT_FAILED
;
739 unit_add_to_dbus_queue(u
);
741 log_notice("Failed to load configuration for %s: %s", u
->meta
.id
, strerror(-r
));
747 * -EBADR: This unit type does not support starting.
748 * -EALREADY: Unit is already started.
749 * -EAGAIN: An operation is already in progress. Retry later.
750 * -ECANCELED: Too many requests for now.
752 int unit_start(Unit
*u
) {
753 UnitActiveState state
;
757 if (u
->meta
.load_state
!= UNIT_LOADED
)
760 /* If this is already (being) started, then this will
761 * succeed. Note that this will even succeed if this unit is
762 * not startable by the user. This is relied on to detect when
763 * we need to wait for units and when waiting is finished. */
764 state
= unit_active_state(u
);
765 if (UNIT_IS_ACTIVE_OR_RELOADING(state
))
768 /* If it is stopped, but we cannot start it, then fail */
769 if (!UNIT_VTABLE(u
)->start
)
772 /* We don't suppress calls to ->start() here when we are
773 * already starting, to allow this request to be used as a
774 * "hurry up" call, for example when the unit is in some "auto
775 * restart" state where it waits for a holdoff timer to elapse
776 * before it will start again. */
778 unit_add_to_dbus_queue(u
);
780 unit_status_printf(u
, "Starting %s...\n", unit_description(u
));
782 return UNIT_VTABLE(u
)->start(u
);
785 bool unit_can_start(Unit
*u
) {
788 return !!UNIT_VTABLE(u
)->start
;
792 * -EBADR: This unit type does not support stopping.
793 * -EALREADY: Unit is already stopped.
794 * -EAGAIN: An operation is already in progress. Retry later.
796 int unit_stop(Unit
*u
) {
797 UnitActiveState state
;
801 state
= unit_active_state(u
);
802 if (UNIT_IS_INACTIVE_OR_MAINTENANCE(state
))
805 if (!UNIT_VTABLE(u
)->stop
)
808 unit_add_to_dbus_queue(u
);
810 unit_status_printf(u
, "Stopping %s...\n", unit_description(u
));
812 return UNIT_VTABLE(u
)->stop(u
);
816 * -EBADR: This unit type does not support reloading.
817 * -ENOEXEC: Unit is not started.
818 * -EAGAIN: An operation is already in progress. Retry later.
820 int unit_reload(Unit
*u
) {
821 UnitActiveState state
;
825 if (u
->meta
.load_state
!= UNIT_LOADED
)
828 if (!unit_can_reload(u
))
831 state
= unit_active_state(u
);
832 if (unit_active_state(u
) == UNIT_RELOADING
)
835 if (unit_active_state(u
) != UNIT_ACTIVE
)
838 unit_add_to_dbus_queue(u
);
839 return UNIT_VTABLE(u
)->reload(u
);
842 bool unit_can_reload(Unit
*u
) {
845 if (!UNIT_VTABLE(u
)->reload
)
848 if (!UNIT_VTABLE(u
)->can_reload
)
851 return UNIT_VTABLE(u
)->can_reload(u
);
854 static void unit_check_uneeded(Unit
*u
) {
860 /* If this service shall be shut down when unneeded then do
863 if (!u
->meta
.stop_when_unneeded
)
866 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
869 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRED_BY
], i
)
870 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
873 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRED_BY_OVERRIDABLE
], i
)
874 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
877 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_WANTED_BY
], i
)
878 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
881 log_info("Service %s is not needed anymore. Stopping.", u
->meta
.id
);
883 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
884 manager_add_job(u
->meta
.manager
, JOB_STOP
, u
, JOB_FAIL
, true, NULL
, NULL
);
887 static void retroactively_start_dependencies(Unit
*u
) {
892 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)));
894 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRES
], i
)
895 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
896 manager_add_job(u
->meta
.manager
, JOB_START
, other
, JOB_REPLACE
, true, NULL
, NULL
);
898 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRES_OVERRIDABLE
], i
)
899 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
900 manager_add_job(u
->meta
.manager
, JOB_START
, other
, JOB_FAIL
, false, NULL
, NULL
);
902 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUISITE
], i
)
903 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
904 manager_add_job(u
->meta
.manager
, JOB_START
, other
, JOB_REPLACE
, true, NULL
, NULL
);
906 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_WANTS
], i
)
907 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
908 manager_add_job(u
->meta
.manager
, JOB_START
, other
, JOB_FAIL
, false, NULL
, NULL
);
910 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_CONFLICTS
], i
)
911 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
912 manager_add_job(u
->meta
.manager
, JOB_STOP
, other
, JOB_REPLACE
, true, NULL
, NULL
);
915 static void retroactively_stop_dependencies(Unit
*u
) {
920 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
922 if (u
->meta
.recursive_stop
) {
923 /* Pull down units need us recursively if enabled */
924 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRED_BY
], i
)
925 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
926 manager_add_job(u
->meta
.manager
, JOB_STOP
, other
, JOB_REPLACE
, true, NULL
, NULL
);
929 /* Garbage collect services that might not be needed anymore, if enabled */
930 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRES
], i
)
931 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
932 unit_check_uneeded(other
);
933 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUIRES_OVERRIDABLE
], i
)
934 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
935 unit_check_uneeded(other
);
936 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_WANTS
], i
)
937 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
938 unit_check_uneeded(other
);
939 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUISITE
], i
)
940 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
941 unit_check_uneeded(other
);
942 SET_FOREACH(other
, u
->meta
.dependencies
[UNIT_REQUISITE_OVERRIDABLE
], i
)
943 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
944 unit_check_uneeded(other
);
947 void unit_notify(Unit
*u
, UnitActiveState os
, UnitActiveState ns
) {
951 assert(os
< _UNIT_ACTIVE_STATE_MAX
);
952 assert(ns
< _UNIT_ACTIVE_STATE_MAX
);
954 /* Note that this is called for all low-level state changes,
955 * even if they might map to the same high-level
956 * UnitActiveState! That means that ns == os is OK an expected
957 * behaviour here. For example: if a mount point is remounted
958 * this function will be called too and the utmp code below
961 dual_timestamp_get(&ts
);
963 if (UNIT_IS_INACTIVE_OR_MAINTENANCE(os
) && !UNIT_IS_INACTIVE_OR_MAINTENANCE(ns
))
964 u
->meta
.inactive_exit_timestamp
= ts
;
965 else if (!UNIT_IS_INACTIVE_OR_MAINTENANCE(os
) && UNIT_IS_INACTIVE_OR_MAINTENANCE(ns
))
966 u
->meta
.inactive_enter_timestamp
= ts
;
968 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
) && UNIT_IS_ACTIVE_OR_RELOADING(ns
))
969 u
->meta
.active_enter_timestamp
= ts
;
970 else if (UNIT_IS_ACTIVE_OR_RELOADING(os
) && !UNIT_IS_ACTIVE_OR_RELOADING(ns
))
971 u
->meta
.active_exit_timestamp
= ts
;
973 timer_unit_notify(u
, ns
);
974 path_unit_notify(u
, ns
);
977 bool unexpected
= false;
979 if (u
->meta
.job
->state
== JOB_WAITING
)
981 /* So we reached a different state for this
982 * job. Let's see if we can run it now if it
983 * failed previously due to EAGAIN. */
984 job_add_to_run_queue(u
->meta
.job
);
987 /* Let's check whether this state change constitutes a
988 * finished job, or maybe cotradicts a running job and
989 * hence needs to invalidate jobs. */
991 switch (u
->meta
.job
->type
) {
994 case JOB_VERIFY_ACTIVE
:
996 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
))
997 job_finish_and_invalidate(u
->meta
.job
, true);
998 else if (u
->meta
.job
->state
== JOB_RUNNING
&& ns
!= UNIT_ACTIVATING
) {
1000 job_finish_and_invalidate(u
->meta
.job
, false);
1006 case JOB_RELOAD_OR_START
:
1008 if (u
->meta
.job
->state
== JOB_RUNNING
) {
1009 if (ns
== UNIT_ACTIVE
)
1010 job_finish_and_invalidate(u
->meta
.job
, true);
1011 else if (ns
!= UNIT_ACTIVATING
&& ns
!= UNIT_RELOADING
) {
1013 job_finish_and_invalidate(u
->meta
.job
, false);
1021 case JOB_TRY_RESTART
:
1023 if (ns
== UNIT_INACTIVE
|| ns
== UNIT_MAINTENANCE
)
1024 job_finish_and_invalidate(u
->meta
.job
, true);
1025 else if (u
->meta
.job
->state
== JOB_RUNNING
&& ns
!= UNIT_DEACTIVATING
) {
1027 job_finish_and_invalidate(u
->meta
.job
, false);
1033 assert_not_reached("Job type unknown");
1036 /* If this state change happened without being
1037 * requested by a job, then let's retroactively start
1038 * or stop dependencies */
1041 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os
) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns
))
1042 retroactively_start_dependencies(u
);
1043 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os
) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
1044 retroactively_stop_dependencies(u
);
1048 /* Some names are special */
1049 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
)) {
1050 if (unit_has_name(u
, SPECIAL_DBUS_SERVICE
)) {
1051 /* The bus just might have become available,
1052 * hence try to connect to it, if we aren't
1054 bus_init(u
->meta
.manager
);
1057 if (unit_has_name(u
, SPECIAL_SYSLOG_SERVICE
))
1058 /* The syslog daemon just might have become
1059 * available, hence try to connect to it, if
1060 * we aren't yet connected. */
1063 if (u
->meta
.type
== UNIT_MOUNT
)
1064 /* Another directory became available, let's
1065 * check if that is enough to write our utmp
1067 manager_write_utmp_reboot(u
->meta
.manager
);
1069 if (u
->meta
.type
== UNIT_TARGET
)
1070 /* A target got activated, maybe this is a runlevel? */
1071 manager_write_utmp_runlevel(u
->meta
.manager
, u
);
1073 } else if (!UNIT_IS_ACTIVE_OR_RELOADING(ns
)) {
1075 if (unit_has_name(u
, SPECIAL_SYSLOG_SERVICE
))
1076 /* The syslog daemon might just have
1077 * terminated, hence try to disconnect from
1081 /* We don't care about D-Bus here, since we'll get an
1082 * asynchronous notification for it anyway. */
1085 /* Maybe we finished startup and are now ready for being
1086 * stopped because unneeded? */
1087 unit_check_uneeded(u
);
1089 unit_add_to_dbus_queue(u
);
1090 unit_add_to_gc_queue(u
);
1093 int unit_watch_fd(Unit
*u
, int fd
, uint32_t events
, Watch
*w
) {
1094 struct epoll_event ev
;
1099 assert(w
->type
== WATCH_INVALID
|| (w
->type
== WATCH_FD
&& w
->fd
== fd
&& w
->data
.unit
== u
));
1105 if (epoll_ctl(u
->meta
.manager
->epoll_fd
,
1106 w
->type
== WATCH_INVALID
? EPOLL_CTL_ADD
: EPOLL_CTL_MOD
,
1118 void unit_unwatch_fd(Unit
*u
, Watch
*w
) {
1122 if (w
->type
== WATCH_INVALID
)
1125 assert(w
->type
== WATCH_FD
);
1126 assert(w
->data
.unit
== u
);
1127 assert_se(epoll_ctl(u
->meta
.manager
->epoll_fd
, EPOLL_CTL_DEL
, w
->fd
, NULL
) >= 0);
1130 w
->type
= WATCH_INVALID
;
1131 w
->data
.unit
= NULL
;
1134 int unit_watch_pid(Unit
*u
, pid_t pid
) {
1138 /* Watch a specific PID. We only support one unit watching
1139 * each PID for now. */
1141 return hashmap_put(u
->meta
.manager
->watch_pids
, UINT32_TO_PTR(pid
), u
);
1144 void unit_unwatch_pid(Unit
*u
, pid_t pid
) {
1148 hashmap_remove_value(u
->meta
.manager
->watch_pids
, UINT32_TO_PTR(pid
), u
);
1151 int unit_watch_timer(Unit
*u
, usec_t delay
, Watch
*w
) {
1152 struct itimerspec its
;
1158 assert(w
->type
== WATCH_INVALID
|| (w
->type
== WATCH_TIMER
&& w
->data
.unit
== u
));
1160 /* This will try to reuse the old timer if there is one */
1162 if (w
->type
== WATCH_TIMER
) {
1167 if ((fd
= timerfd_create(CLOCK_MONOTONIC
, TFD_NONBLOCK
|TFD_CLOEXEC
)) < 0)
1174 /* Set absolute time in the past, but not 0, since we
1175 * don't want to disarm the timer */
1176 its
.it_value
.tv_sec
= 0;
1177 its
.it_value
.tv_nsec
= 1;
1179 flags
= TFD_TIMER_ABSTIME
;
1181 timespec_store(&its
.it_value
, delay
);
1185 /* This will also flush the elapse counter */
1186 if (timerfd_settime(fd
, flags
, &its
, NULL
) < 0)
1189 if (w
->type
== WATCH_INVALID
) {
1190 struct epoll_event ev
;
1194 ev
.events
= EPOLLIN
;
1196 if (epoll_ctl(u
->meta
.manager
->epoll_fd
, EPOLL_CTL_ADD
, fd
, &ev
) < 0)
1201 w
->type
= WATCH_TIMER
;
1208 close_nointr_nofail(fd
);
1213 void unit_unwatch_timer(Unit
*u
, Watch
*w
) {
1217 if (w
->type
== WATCH_INVALID
)
1220 assert(w
->type
== WATCH_TIMER
&& w
->data
.unit
== u
);
1222 assert_se(epoll_ctl(u
->meta
.manager
->epoll_fd
, EPOLL_CTL_DEL
, w
->fd
, NULL
) >= 0);
1223 close_nointr_nofail(w
->fd
);
1226 w
->type
= WATCH_INVALID
;
1227 w
->data
.unit
= NULL
;
1230 bool unit_job_is_applicable(Unit
*u
, JobType j
) {
1232 assert(j
>= 0 && j
< _JOB_TYPE_MAX
);
1236 case JOB_VERIFY_ACTIVE
:
1242 case JOB_TRY_RESTART
:
1243 return unit_can_start(u
);
1246 return unit_can_reload(u
);
1248 case JOB_RELOAD_OR_START
:
1249 return unit_can_reload(u
) && unit_can_start(u
);
1252 assert_not_reached("Invalid job type");
1256 int unit_add_dependency(Unit
*u
, UnitDependency d
, Unit
*other
, bool add_reference
) {
1258 static const UnitDependency inverse_table
[_UNIT_DEPENDENCY_MAX
] = {
1259 [UNIT_REQUIRES
] = UNIT_REQUIRED_BY
,
1260 [UNIT_REQUIRES_OVERRIDABLE
] = UNIT_REQUIRED_BY_OVERRIDABLE
,
1261 [UNIT_WANTS
] = UNIT_WANTED_BY
,
1262 [UNIT_REQUISITE
] = UNIT_REQUIRED_BY
,
1263 [UNIT_REQUISITE_OVERRIDABLE
] = UNIT_REQUIRED_BY_OVERRIDABLE
,
1264 [UNIT_REQUIRED_BY
] = _UNIT_DEPENDENCY_INVALID
,
1265 [UNIT_REQUIRED_BY_OVERRIDABLE
] = _UNIT_DEPENDENCY_INVALID
,
1266 [UNIT_WANTED_BY
] = _UNIT_DEPENDENCY_INVALID
,
1267 [UNIT_CONFLICTS
] = UNIT_CONFLICTS
,
1268 [UNIT_BEFORE
] = UNIT_AFTER
,
1269 [UNIT_AFTER
] = UNIT_BEFORE
,
1270 [UNIT_REFERENCES
] = UNIT_REFERENCED_BY
,
1271 [UNIT_REFERENCED_BY
] = UNIT_REFERENCES
1273 int r
, q
= 0, v
= 0, w
= 0;
1276 assert(d
>= 0 && d
< _UNIT_DEPENDENCY_MAX
);
1277 assert(inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
);
1280 /* We won't allow dependencies on ourselves. We will not
1281 * consider them an error however. */
1285 if (UNIT_VTABLE(u
)->no_requires
&&
1286 (d
== UNIT_REQUIRES
||
1287 d
== UNIT_REQUIRES_OVERRIDABLE
||
1288 d
== UNIT_REQUISITE
||
1289 d
== UNIT_REQUISITE_OVERRIDABLE
)) {
1293 if ((r
= set_ensure_allocated(&u
->meta
.dependencies
[d
], trivial_hash_func
, trivial_compare_func
)) < 0 ||
1294 (r
= set_ensure_allocated(&other
->meta
.dependencies
[inverse_table
[d
]], trivial_hash_func
, trivial_compare_func
)) < 0)
1298 if ((r
= set_ensure_allocated(&u
->meta
.dependencies
[UNIT_REFERENCES
], trivial_hash_func
, trivial_compare_func
)) < 0 ||
1299 (r
= set_ensure_allocated(&other
->meta
.dependencies
[UNIT_REFERENCED_BY
], trivial_hash_func
, trivial_compare_func
)) < 0)
1302 if ((q
= set_put(u
->meta
.dependencies
[d
], other
)) < 0)
1305 if ((v
= set_put(other
->meta
.dependencies
[inverse_table
[d
]], u
)) < 0) {
1310 if (add_reference
) {
1311 if ((w
= set_put(u
->meta
.dependencies
[UNIT_REFERENCES
], other
)) < 0) {
1316 if ((r
= set_put(other
->meta
.dependencies
[UNIT_REFERENCED_BY
], u
)) < 0)
1320 unit_add_to_dbus_queue(u
);
1325 set_remove(u
->meta
.dependencies
[d
], other
);
1328 set_remove(other
->meta
.dependencies
[inverse_table
[d
]], u
);
1331 set_remove(u
->meta
.dependencies
[UNIT_REFERENCES
], other
);
1336 int unit_add_two_dependencies(Unit
*u
, UnitDependency d
, UnitDependency e
, Unit
*other
, bool add_reference
) {
1341 if ((r
= unit_add_dependency(u
, d
, other
, add_reference
)) < 0)
1344 if ((r
= unit_add_dependency(u
, e
, other
, add_reference
)) < 0)
1350 static const char *resolve_template(Unit
*u
, const char *name
, const char*path
, char **p
) {
1354 assert(name
|| path
);
1357 name
= file_name_from_path(path
);
1359 if (!unit_name_is_template(name
)) {
1364 if (u
->meta
.instance
)
1365 s
= unit_name_replace_instance(name
, u
->meta
.instance
);
1369 if (!(i
= unit_name_to_prefix(u
->meta
.id
)))
1372 s
= unit_name_replace_instance(name
, i
);
1383 int unit_add_dependency_by_name(Unit
*u
, UnitDependency d
, const char *name
, const char *path
, bool add_reference
) {
1389 assert(name
|| path
);
1391 if (!(name
= resolve_template(u
, name
, path
, &s
)))
1394 if ((r
= manager_load_unit(u
->meta
.manager
, name
, path
, NULL
, &other
)) < 0)
1397 r
= unit_add_dependency(u
, d
, other
, add_reference
);
1404 int unit_add_two_dependencies_by_name(Unit
*u
, UnitDependency d
, UnitDependency e
, const char *name
, const char *path
, bool add_reference
) {
1410 assert(name
|| path
);
1412 if (!(name
= resolve_template(u
, name
, path
, &s
)))
1415 if ((r
= manager_load_unit(u
->meta
.manager
, name
, path
, NULL
, &other
)) < 0)
1418 r
= unit_add_two_dependencies(u
, d
, e
, other
, add_reference
);
1425 int unit_add_dependency_by_name_inverse(Unit
*u
, UnitDependency d
, const char *name
, const char *path
, bool add_reference
) {
1431 assert(name
|| path
);
1433 if (!(name
= resolve_template(u
, name
, path
, &s
)))
1436 if ((r
= manager_load_unit(u
->meta
.manager
, name
, path
, NULL
, &other
)) < 0)
1439 r
= unit_add_dependency(other
, d
, u
, add_reference
);
1446 int unit_add_two_dependencies_by_name_inverse(Unit
*u
, UnitDependency d
, UnitDependency e
, const char *name
, const char *path
, bool add_reference
) {
1452 assert(name
|| path
);
1454 if (!(name
= resolve_template(u
, name
, path
, &s
)))
1457 if ((r
= manager_load_unit(u
->meta
.manager
, name
, path
, NULL
, &other
)) < 0)
1460 if ((r
= unit_add_two_dependencies(other
, d
, e
, u
, add_reference
)) < 0)
1468 int set_unit_path(const char *p
) {
1472 /* This is mostly for debug purposes */
1474 if (path_is_absolute(p
)) {
1475 if (!(c
= strdup(p
)))
1478 if (!(cwd
= get_current_dir_name()))
1481 r
= asprintf(&c
, "%s/%s", cwd
, p
);
1488 if (setenv("SYSTEMD_UNIT_PATH", c
, 0) < 0) {
1497 char *unit_dbus_path(Unit
*u
) {
1502 if (!(e
= bus_path_escape(u
->meta
.id
)))
1505 if (asprintf(&p
, "/org/freedesktop/systemd1/unit/%s", e
) < 0) {
1514 int unit_add_cgroup(Unit
*u
, CGroupBonding
*b
) {
1522 /* Ensure this hasn't been added yet */
1525 l
= hashmap_get(u
->meta
.manager
->cgroup_bondings
, b
->path
);
1526 LIST_PREPEND(CGroupBonding
, by_path
, l
, b
);
1528 if ((r
= hashmap_replace(u
->meta
.manager
->cgroup_bondings
, b
->path
, l
)) < 0) {
1529 LIST_REMOVE(CGroupBonding
, by_path
, l
, b
);
1533 LIST_PREPEND(CGroupBonding
, by_unit
, u
->meta
.cgroup_bondings
, b
);
1539 static char *default_cgroup_path(Unit
*u
) {
1545 if (u
->meta
.instance
) {
1548 if (!(t
= unit_name_template(u
->meta
.id
)))
1551 r
= asprintf(&p
, "%s/%s/%s", u
->meta
.manager
->cgroup_hierarchy
, t
, u
->meta
.instance
);
1554 r
= asprintf(&p
, "%s/%s", u
->meta
.manager
->cgroup_hierarchy
, u
->meta
.id
);
1556 return r
< 0 ? NULL
: p
;
1559 int unit_add_cgroup_from_text(Unit
*u
, const char *name
) {
1561 char *controller
= NULL
, *path
= NULL
;
1562 CGroupBonding
*b
= NULL
;
1568 /* Detect controller name */
1569 n
= strcspn(name
, ":");
1572 (name
[n
] == ':' && name
[n
+1] == 0)) {
1574 /* Only controller name, no path? */
1576 if (!(path
= default_cgroup_path(u
)))
1582 /* Controller name, and path. */
1585 if (!path_is_absolute(p
))
1588 if (!(path
= strdup(p
)))
1593 controller
= strndup(name
, n
);
1595 controller
= strdup(u
->meta
.manager
->cgroup_controller
);
1602 if (cgroup_bonding_find_list(u
->meta
.cgroup_bondings
, controller
)) {
1607 if (!(b
= new0(CGroupBonding
, 1))) {
1612 b
->controller
= controller
;
1615 b
->clean_up
= false;
1617 if ((r
= unit_add_cgroup(u
, b
)) < 0)
1630 int unit_add_default_cgroup(Unit
*u
) {
1636 /* Adds in the default cgroup data, if it wasn't specified yet */
1638 if (unit_get_default_cgroup(u
))
1641 if (!(b
= new0(CGroupBonding
, 1)))
1644 if (!(b
->controller
= strdup(u
->meta
.manager
->cgroup_controller
)))
1647 if (!(b
->path
= default_cgroup_path(u
)))
1653 if ((r
= unit_add_cgroup(u
, b
)) < 0)
1660 free(b
->controller
);
1666 CGroupBonding
* unit_get_default_cgroup(Unit
*u
) {
1669 return cgroup_bonding_find_list(u
->meta
.cgroup_bondings
, u
->meta
.manager
->cgroup_controller
);
1672 int unit_load_related_unit(Unit
*u
, const char *type
, Unit
**_found
) {
1680 if (!(t
= unit_name_change_suffix(u
->meta
.id
, type
)))
1683 assert(!unit_has_name(u
, t
));
1685 r
= manager_load_unit(u
->meta
.manager
, t
, NULL
, NULL
, _found
);
1688 assert(r
< 0 || *_found
!= u
);
1693 int unit_get_related_unit(Unit
*u
, const char *type
, Unit
**_found
) {
1701 if (!(t
= unit_name_change_suffix(u
->meta
.id
, type
)))
1704 assert(!unit_has_name(u
, t
));
1706 found
= manager_get_unit(u
->meta
.manager
, t
);
1716 static char *specifier_prefix_and_instance(char specifier
, void *data
, void *userdata
) {
1720 return unit_name_to_prefix_and_instance(u
->meta
.id
);
1723 static char *specifier_prefix(char specifier
, void *data
, void *userdata
) {
1727 return unit_name_to_prefix(u
->meta
.id
);
1730 static char *specifier_prefix_unescaped(char specifier
, void *data
, void *userdata
) {
1736 if (!(p
= unit_name_to_prefix(u
->meta
.id
)))
1739 r
= unit_name_unescape(p
);
1745 static char *specifier_instance_unescaped(char specifier
, void *data
, void *userdata
) {
1749 if (u
->meta
.instance
)
1750 return unit_name_unescape(u
->meta
.instance
);
1755 char *unit_name_printf(Unit
*u
, const char* format
) {
1758 * This will use the passed string as format string and
1759 * replace the following specifiers:
1761 * %n: the full id of the unit (foo@bar.waldo)
1762 * %N: the id of the unit without the suffix (foo@bar)
1763 * %p: the prefix (foo)
1764 * %i: the instance (bar)
1767 const Specifier table
[] = {
1768 { 'n', specifier_string
, u
->meta
.id
},
1769 { 'N', specifier_prefix_and_instance
, NULL
},
1770 { 'p', specifier_prefix
, NULL
},
1771 { 'i', specifier_string
, u
->meta
.instance
},
1778 return specifier_printf(format
, table
, u
);
1781 char *unit_full_printf(Unit
*u
, const char *format
) {
1783 /* This is similar to unit_name_printf() but also supports
1786 const Specifier table
[] = {
1787 { 'n', specifier_string
, u
->meta
.id
},
1788 { 'N', specifier_prefix_and_instance
, NULL
},
1789 { 'p', specifier_prefix
, NULL
},
1790 { 'P', specifier_prefix_unescaped
, NULL
},
1791 { 'i', specifier_string
, u
->meta
.instance
},
1792 { 'I', specifier_instance_unescaped
, NULL
},
1799 return specifier_printf(format
, table
, u
);
1802 char **unit_full_printf_strv(Unit
*u
, char **l
) {
1806 /* Applies unit_full_printf to every entry in l */
1811 if (!(r
= new(char*, n
+1)))
1814 for (i
= l
, j
= r
; *i
; i
++, j
++)
1815 if (!(*j
= unit_full_printf(u
, *i
)))
1831 int unit_watch_bus_name(Unit
*u
, const char *name
) {
1835 /* Watch a specific name on the bus. We only support one unit
1836 * watching each name for now. */
1838 return hashmap_put(u
->meta
.manager
->watch_bus
, name
, u
);
1841 void unit_unwatch_bus_name(Unit
*u
, const char *name
) {
1845 hashmap_remove_value(u
->meta
.manager
->watch_bus
, name
, u
);
1848 bool unit_can_serialize(Unit
*u
) {
1851 return UNIT_VTABLE(u
)->serialize
&& UNIT_VTABLE(u
)->deserialize_item
;
1854 int unit_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
1861 if (!unit_can_serialize(u
))
1864 if ((r
= UNIT_VTABLE(u
)->serialize(u
, f
, fds
)) < 0)
1868 unit_serialize_item(u
, f
, "job", job_type_to_string(u
->meta
.job
->type
));
1875 void unit_serialize_item_format(Unit
*u
, FILE *f
, const char *key
, const char *format
, ...) {
1886 va_start(ap
, format
);
1887 vfprintf(f
, format
, ap
);
1893 void unit_serialize_item(Unit
*u
, FILE *f
, const char *key
, const char *value
) {
1899 fprintf(f
, "%s=%s\n", key
, value
);
1902 int unit_deserialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
1909 if (!unit_can_serialize(u
))
1913 char line
[1024], *l
, *v
;
1916 if (!fgets(line
, sizeof(line
), f
)) {
1928 k
= strcspn(l
, "=");
1936 if (streq(l
, "job")) {
1939 if ((type
= job_type_from_string(v
)) < 0)
1940 log_debug("Failed to parse job type value %s", v
);
1942 u
->meta
.deserialized_job
= type
;
1947 if ((r
= UNIT_VTABLE(u
)->deserialize_item(u
, l
, v
, fds
)) < 0)
1952 int unit_add_node_link(Unit
*u
, const char *what
, bool wants
) {
1962 /* Adds in links to the device node that this unit is based on */
1964 if (!is_device_path(what
))
1967 if (!(e
= unit_name_build_escape(what
+1, NULL
, ".device")))
1970 r
= manager_load_unit(u
->meta
.manager
, e
, NULL
, NULL
, &device
);
1976 if ((r
= unit_add_two_dependencies(u
, UNIT_AFTER
, UNIT_REQUIRES
, device
, true)) < 0)
1980 if ((r
= unit_add_dependency(device
, UNIT_WANTS
, u
, false)) < 0)
1986 int unit_coldplug(Unit
*u
) {
1991 if (UNIT_VTABLE(u
)->coldplug
)
1992 if ((r
= UNIT_VTABLE(u
)->coldplug(u
)) < 0)
1995 if (u
->meta
.deserialized_job
>= 0) {
1996 if ((r
= manager_add_job(u
->meta
.manager
, u
->meta
.deserialized_job
, u
, JOB_FAIL
, false, NULL
, NULL
)) < 0)
1999 u
->meta
.deserialized_job
= _JOB_TYPE_INVALID
;
2005 void unit_status_printf(Unit
*u
, const char *format
, ...) {
2011 if (!UNIT_VTABLE(u
)->show_status
)
2014 if (u
->meta
.manager
->running_as
!= MANAGER_SYSTEM
)
2017 if (!u
->meta
.manager
->show_status
)
2020 if (!manager_is_booting_or_shutting_down(u
->meta
.manager
))
2023 va_start(ap
, format
);
2024 status_vprintf(format
, ap
);
2028 static const char* const unit_type_table
[_UNIT_TYPE_MAX
] = {
2029 [UNIT_SERVICE
] = "service",
2030 [UNIT_TIMER
] = "timer",
2031 [UNIT_SOCKET
] = "socket",
2032 [UNIT_TARGET
] = "target",
2033 [UNIT_DEVICE
] = "device",
2034 [UNIT_MOUNT
] = "mount",
2035 [UNIT_AUTOMOUNT
] = "automount",
2036 [UNIT_SNAPSHOT
] = "snapshot",
2037 [UNIT_SWAP
] = "swap"
2040 DEFINE_STRING_TABLE_LOOKUP(unit_type
, UnitType
);
2042 static const char* const unit_load_state_table
[_UNIT_LOAD_STATE_MAX
] = {
2043 [UNIT_STUB
] = "stub",
2044 [UNIT_LOADED
] = "loaded",
2045 [UNIT_FAILED
] = "failed",
2046 [UNIT_MERGED
] = "merged"
2049 DEFINE_STRING_TABLE_LOOKUP(unit_load_state
, UnitLoadState
);
2051 static const char* const unit_active_state_table
[_UNIT_ACTIVE_STATE_MAX
] = {
2052 [UNIT_ACTIVE
] = "active",
2053 [UNIT_RELOADING
] = "reloading",
2054 [UNIT_INACTIVE
] = "inactive",
2055 [UNIT_MAINTENANCE
] = "maintenance",
2056 [UNIT_ACTIVATING
] = "activating",
2057 [UNIT_DEACTIVATING
] = "deactivating"
2060 DEFINE_STRING_TABLE_LOOKUP(unit_active_state
, UnitActiveState
);
2062 static const char* const unit_dependency_table
[_UNIT_DEPENDENCY_MAX
] = {
2063 [UNIT_REQUIRES
] = "Requires",
2064 [UNIT_REQUIRES_OVERRIDABLE
] = "RequiresOverridable",
2065 [UNIT_WANTS
] = "Wants",
2066 [UNIT_REQUISITE
] = "Requisite",
2067 [UNIT_REQUISITE_OVERRIDABLE
] = "RequisiteOverridable",
2068 [UNIT_REQUIRED_BY
] = "RequiredBy",
2069 [UNIT_REQUIRED_BY_OVERRIDABLE
] = "RequiredByOverridable",
2070 [UNIT_WANTED_BY
] = "WantedBy",
2071 [UNIT_CONFLICTS
] = "Conflicts",
2072 [UNIT_BEFORE
] = "Before",
2073 [UNIT_AFTER
] = "After",
2074 [UNIT_REFERENCES
] = "References",
2075 [UNIT_REFERENCED_BY
] = "ReferencedBy"
2078 DEFINE_STRING_TABLE_LOOKUP(unit_dependency
, UnitDependency
);
2080 static const char* const kill_mode_table
[_KILL_MODE_MAX
] = {
2081 [KILL_CONTROL_GROUP
] = "control-group",
2082 [KILL_PROCESS_GROUP
] = "process-group",
2083 [KILL_PROCESS
] = "process",
2084 [KILL_NONE
] = "none"
2087 DEFINE_STRING_TABLE_LOOKUP(kill_mode
, KillMode
);