2 This file is part of systemd.
4 Copyright 2010 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
27 #include "sd-messages.h"
29 #include "alloc-util.h"
30 #include "bus-common-errors.h"
32 #include "cgroup-util.h"
33 #include "dbus-unit.h"
38 #include "fileio-label.h"
39 #include "formats-util.h"
40 #include "load-dropin.h"
41 #include "load-fragment.h"
46 #include "parse-util.h"
47 #include "path-util.h"
48 #include "process-util.h"
51 #include "stat-util.h"
52 #include "stdio-util.h"
53 #include "string-util.h"
55 #include "unit-name.h"
57 #include "user-util.h"
60 const UnitVTable
* const unit_vtable
[_UNIT_TYPE_MAX
] = {
61 [UNIT_SERVICE
] = &service_vtable
,
62 [UNIT_SOCKET
] = &socket_vtable
,
63 [UNIT_BUSNAME
] = &busname_vtable
,
64 [UNIT_TARGET
] = &target_vtable
,
65 [UNIT_DEVICE
] = &device_vtable
,
66 [UNIT_MOUNT
] = &mount_vtable
,
67 [UNIT_AUTOMOUNT
] = &automount_vtable
,
68 [UNIT_SWAP
] = &swap_vtable
,
69 [UNIT_TIMER
] = &timer_vtable
,
70 [UNIT_PATH
] = &path_vtable
,
71 [UNIT_SLICE
] = &slice_vtable
,
72 [UNIT_SCOPE
] = &scope_vtable
75 static void maybe_warn_about_dependency(Unit
*u
, const char *other
, UnitDependency dependency
);
77 Unit
*unit_new(Manager
*m
, size_t size
) {
81 assert(size
>= sizeof(Unit
));
87 u
->names
= set_new(&string_hash_ops
);
94 u
->type
= _UNIT_TYPE_INVALID
;
95 u
->default_dependencies
= true;
96 u
->unit_file_state
= _UNIT_FILE_STATE_INVALID
;
97 u
->unit_file_preset
= -1;
98 u
->on_failure_job_mode
= JOB_REPLACE
;
99 u
->cgroup_inotify_wd
= -1;
100 u
->job_timeout
= USEC_INFINITY
;
102 RATELIMIT_INIT(u
->start_limit
, m
->default_start_limit_interval
, m
->default_start_limit_burst
);
103 RATELIMIT_INIT(u
->auto_stop_ratelimit
, 10 * USEC_PER_SEC
, 16);
108 bool unit_has_name(Unit
*u
, const char *name
) {
112 return !!set_get(u
->names
, (char*) name
);
115 static void unit_init(Unit
*u
) {
122 assert(u
->type
>= 0);
124 cc
= unit_get_cgroup_context(u
);
126 cgroup_context_init(cc
);
128 /* Copy in the manager defaults into the cgroup
129 * context, _before_ the rest of the settings have
130 * been initialized */
132 cc
->cpu_accounting
= u
->manager
->default_cpu_accounting
;
133 cc
->blockio_accounting
= u
->manager
->default_blockio_accounting
;
134 cc
->memory_accounting
= u
->manager
->default_memory_accounting
;
135 cc
->tasks_accounting
= u
->manager
->default_tasks_accounting
;
137 if (u
->type
!= UNIT_SLICE
)
138 cc
->tasks_max
= u
->manager
->default_tasks_max
;
141 ec
= unit_get_exec_context(u
);
143 exec_context_init(ec
);
145 kc
= unit_get_kill_context(u
);
147 kill_context_init(kc
);
149 if (UNIT_VTABLE(u
)->init
)
150 UNIT_VTABLE(u
)->init(u
);
153 int unit_add_name(Unit
*u
, const char *text
) {
154 _cleanup_free_
char *s
= NULL
, *i
= NULL
;
161 if (unit_name_is_valid(text
, UNIT_NAME_TEMPLATE
)) {
166 r
= unit_name_replace_instance(text
, u
->instance
, &s
);
175 if (set_contains(u
->names
, s
))
177 if (hashmap_contains(u
->manager
->units
, s
))
180 if (!unit_name_is_valid(s
, UNIT_NAME_PLAIN
|UNIT_NAME_INSTANCE
))
183 t
= unit_name_to_type(s
);
187 if (u
->type
!= _UNIT_TYPE_INVALID
&& t
!= u
->type
)
190 r
= unit_name_to_instance(s
, &i
);
194 if (i
&& unit_vtable
[t
]->no_instances
)
197 /* Ensure that this unit is either instanced or not instanced,
198 * but not both. Note that we do allow names with different
199 * instance names however! */
200 if (u
->type
!= _UNIT_TYPE_INVALID
&& !u
->instance
!= !i
)
203 if (unit_vtable
[t
]->no_alias
&& !set_isempty(u
->names
))
206 if (hashmap_size(u
->manager
->units
) >= MANAGER_MAX_NAMES
)
209 r
= set_put(u
->names
, s
);
214 r
= hashmap_put(u
->manager
->units
, s
, u
);
216 (void) set_remove(u
->names
, s
);
220 if (u
->type
== _UNIT_TYPE_INVALID
) {
225 LIST_PREPEND(units_by_type
, u
->manager
->units_by_type
[t
], u
);
234 unit_add_to_dbus_queue(u
);
238 int unit_choose_id(Unit
*u
, const char *name
) {
239 _cleanup_free_
char *t
= NULL
;
246 if (unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
251 r
= unit_name_replace_instance(name
, u
->instance
, &t
);
258 /* Selects one of the names of this unit as the id */
259 s
= set_get(u
->names
, (char*) name
);
263 /* Determine the new instance from the new id */
264 r
= unit_name_to_instance(s
, &i
);
273 unit_add_to_dbus_queue(u
);
278 int unit_set_description(Unit
*u
, const char *description
) {
283 if (isempty(description
))
286 s
= strdup(description
);
291 free(u
->description
);
294 unit_add_to_dbus_queue(u
);
298 bool unit_check_gc(Unit
*u
) {
299 UnitActiveState state
;
308 state
= unit_active_state(u
);
310 /* If the unit is inactive and failed and no job is queued for
311 * it, then release its runtime resources */
312 if (UNIT_IS_INACTIVE_OR_FAILED(state
) &&
313 UNIT_VTABLE(u
)->release_resources
)
314 UNIT_VTABLE(u
)->release_resources(u
);
316 /* But we keep the unit object around for longer when it is
317 * referenced or configured to not be gc'ed */
318 if (state
!= UNIT_INACTIVE
)
327 if (UNIT_VTABLE(u
)->check_gc
)
328 if (UNIT_VTABLE(u
)->check_gc(u
))
334 void unit_add_to_load_queue(Unit
*u
) {
336 assert(u
->type
!= _UNIT_TYPE_INVALID
);
338 if (u
->load_state
!= UNIT_STUB
|| u
->in_load_queue
)
341 LIST_PREPEND(load_queue
, u
->manager
->load_queue
, u
);
342 u
->in_load_queue
= true;
345 void unit_add_to_cleanup_queue(Unit
*u
) {
348 if (u
->in_cleanup_queue
)
351 LIST_PREPEND(cleanup_queue
, u
->manager
->cleanup_queue
, u
);
352 u
->in_cleanup_queue
= true;
355 void unit_add_to_gc_queue(Unit
*u
) {
358 if (u
->in_gc_queue
|| u
->in_cleanup_queue
)
361 if (unit_check_gc(u
))
364 LIST_PREPEND(gc_queue
, u
->manager
->gc_queue
, u
);
365 u
->in_gc_queue
= true;
367 u
->manager
->n_in_gc_queue
++;
370 void unit_add_to_dbus_queue(Unit
*u
) {
372 assert(u
->type
!= _UNIT_TYPE_INVALID
);
374 if (u
->load_state
== UNIT_STUB
|| u
->in_dbus_queue
)
377 /* Shortcut things if nobody cares */
378 if (sd_bus_track_count(u
->manager
->subscribed
) <= 0 &&
379 set_isempty(u
->manager
->private_buses
)) {
380 u
->sent_dbus_new_signal
= true;
384 LIST_PREPEND(dbus_queue
, u
->manager
->dbus_unit_queue
, u
);
385 u
->in_dbus_queue
= true;
388 static void bidi_set_free(Unit
*u
, Set
*s
) {
394 /* Frees the set and makes sure we are dropped from the
395 * inverse pointers */
397 SET_FOREACH(other
, s
, i
) {
400 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
401 set_remove(other
->dependencies
[d
], u
);
403 unit_add_to_gc_queue(other
);
409 static void unit_remove_transient(Unit
*u
) {
417 if (u
->fragment_path
)
418 (void) unlink(u
->fragment_path
);
420 STRV_FOREACH(i
, u
->dropin_paths
) {
421 _cleanup_free_
char *p
= NULL
, *pp
= NULL
;
423 p
= dirname_malloc(*i
); /* Get the drop-in directory from the drop-in file */
427 pp
= dirname_malloc(p
); /* Get the config directory from the drop-in directory */
431 /* Only drop transient drop-ins */
432 if (!path_equal(u
->manager
->lookup_paths
.transient
, pp
))
440 static void unit_free_requires_mounts_for(Unit
*u
) {
443 STRV_FOREACH(j
, u
->requires_mounts_for
) {
444 char s
[strlen(*j
) + 1];
446 PATH_FOREACH_PREFIX_MORE(s
, *j
) {
450 x
= hashmap_get2(u
->manager
->units_requiring_mounts_for
, s
, (void**) &y
);
456 if (set_isempty(x
)) {
457 hashmap_remove(u
->manager
->units_requiring_mounts_for
, y
);
464 u
->requires_mounts_for
= strv_free(u
->requires_mounts_for
);
467 static void unit_done(Unit
*u
) {
476 if (UNIT_VTABLE(u
)->done
)
477 UNIT_VTABLE(u
)->done(u
);
479 ec
= unit_get_exec_context(u
);
481 exec_context_done(ec
);
483 cc
= unit_get_cgroup_context(u
);
485 cgroup_context_done(cc
);
488 void unit_free(Unit
*u
) {
495 if (!MANAGER_IS_RELOADING(u
->manager
))
496 unit_remove_transient(u
);
498 bus_unit_send_removed_signal(u
);
502 sd_bus_slot_unref(u
->match_bus_slot
);
504 unit_free_requires_mounts_for(u
);
506 SET_FOREACH(t
, u
->names
, i
)
507 hashmap_remove_value(u
->manager
->units
, t
, u
);
521 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
522 bidi_set_free(u
, u
->dependencies
[d
]);
524 if (u
->type
!= _UNIT_TYPE_INVALID
)
525 LIST_REMOVE(units_by_type
, u
->manager
->units_by_type
[u
->type
], u
);
527 if (u
->in_load_queue
)
528 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
530 if (u
->in_dbus_queue
)
531 LIST_REMOVE(dbus_queue
, u
->manager
->dbus_unit_queue
, u
);
533 if (u
->in_cleanup_queue
)
534 LIST_REMOVE(cleanup_queue
, u
->manager
->cleanup_queue
, u
);
536 if (u
->in_gc_queue
) {
537 LIST_REMOVE(gc_queue
, u
->manager
->gc_queue
, u
);
538 u
->manager
->n_in_gc_queue
--;
541 if (u
->in_cgroup_queue
)
542 LIST_REMOVE(cgroup_queue
, u
->manager
->cgroup_queue
, u
);
544 unit_release_cgroup(u
);
546 (void) manager_update_failed_units(u
->manager
, u
, false);
547 set_remove(u
->manager
->startup_units
, u
);
549 free(u
->description
);
550 strv_free(u
->documentation
);
551 free(u
->fragment_path
);
552 free(u
->source_path
);
553 strv_free(u
->dropin_paths
);
556 free(u
->job_timeout_reboot_arg
);
558 set_free_free(u
->names
);
560 unit_unwatch_all_pids(u
);
562 condition_free_list(u
->conditions
);
563 condition_free_list(u
->asserts
);
567 unit_ref_unset(&u
->slice
);
570 unit_ref_unset(u
->refs
);
575 UnitActiveState
unit_active_state(Unit
*u
) {
578 if (u
->load_state
== UNIT_MERGED
)
579 return unit_active_state(unit_follow_merge(u
));
581 /* After a reload it might happen that a unit is not correctly
582 * loaded but still has a process around. That's why we won't
583 * shortcut failed loading to UNIT_INACTIVE_FAILED. */
585 return UNIT_VTABLE(u
)->active_state(u
);
588 const char* unit_sub_state_to_string(Unit
*u
) {
591 return UNIT_VTABLE(u
)->sub_state_to_string(u
);
594 static int complete_move(Set
**s
, Set
**other
) {
604 r
= set_move(*s
, *other
);
615 static int merge_names(Unit
*u
, Unit
*other
) {
623 r
= complete_move(&u
->names
, &other
->names
);
627 set_free_free(other
->names
);
631 SET_FOREACH(t
, u
->names
, i
)
632 assert_se(hashmap_replace(u
->manager
->units
, t
, u
) == 0);
637 static int reserve_dependencies(Unit
*u
, Unit
*other
, UnitDependency d
) {
642 assert(d
< _UNIT_DEPENDENCY_MAX
);
645 * If u does not have this dependency set allocated, there is no need
646 * to reserve anything. In that case other's set will be transferred
647 * as a whole to u by complete_move().
649 if (!u
->dependencies
[d
])
652 /* merge_dependencies() will skip a u-on-u dependency */
653 n_reserve
= set_size(other
->dependencies
[d
]) - !!set_get(other
->dependencies
[d
], u
);
655 return set_reserve(u
->dependencies
[d
], n_reserve
);
658 static void merge_dependencies(Unit
*u
, Unit
*other
, const char *other_id
, UnitDependency d
) {
665 assert(d
< _UNIT_DEPENDENCY_MAX
);
667 /* Fix backwards pointers */
668 SET_FOREACH(back
, other
->dependencies
[d
], i
) {
671 for (k
= 0; k
< _UNIT_DEPENDENCY_MAX
; k
++) {
672 /* Do not add dependencies between u and itself */
674 if (set_remove(back
->dependencies
[k
], other
))
675 maybe_warn_about_dependency(u
, other_id
, k
);
677 r
= set_remove_and_put(back
->dependencies
[k
], other
, u
);
679 set_remove(back
->dependencies
[k
], other
);
681 assert(r
>= 0 || r
== -ENOENT
);
686 /* Also do not move dependencies on u to itself */
687 back
= set_remove(other
->dependencies
[d
], u
);
689 maybe_warn_about_dependency(u
, other_id
, d
);
691 /* The move cannot fail. The caller must have performed a reservation. */
692 assert_se(complete_move(&u
->dependencies
[d
], &other
->dependencies
[d
]) == 0);
694 other
->dependencies
[d
] = set_free(other
->dependencies
[d
]);
697 int unit_merge(Unit
*u
, Unit
*other
) {
699 const char *other_id
= NULL
;
704 assert(u
->manager
== other
->manager
);
705 assert(u
->type
!= _UNIT_TYPE_INVALID
);
707 other
= unit_follow_merge(other
);
712 if (u
->type
!= other
->type
)
715 if (!u
->instance
!= !other
->instance
)
718 if (other
->load_state
!= UNIT_STUB
&&
719 other
->load_state
!= UNIT_NOT_FOUND
)
728 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
732 other_id
= strdupa(other
->id
);
734 /* Make reservations to ensure merge_dependencies() won't fail */
735 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
736 r
= reserve_dependencies(u
, other
, d
);
738 * We don't rollback reservations if we fail. We don't have
739 * a way to undo reservations. A reservation is not a leak.
746 r
= merge_names(u
, other
);
750 /* Redirect all references */
752 unit_ref_set(other
->refs
, u
);
754 /* Merge dependencies */
755 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
756 merge_dependencies(u
, other
, other_id
, d
);
758 other
->load_state
= UNIT_MERGED
;
759 other
->merged_into
= u
;
761 /* If there is still some data attached to the other node, we
762 * don't need it anymore, and can free it. */
763 if (other
->load_state
!= UNIT_STUB
)
764 if (UNIT_VTABLE(other
)->done
)
765 UNIT_VTABLE(other
)->done(other
);
767 unit_add_to_dbus_queue(u
);
768 unit_add_to_cleanup_queue(other
);
773 int unit_merge_by_name(Unit
*u
, const char *name
) {
776 _cleanup_free_
char *s
= NULL
;
781 if (unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
785 r
= unit_name_replace_instance(name
, u
->instance
, &s
);
792 other
= manager_get_unit(u
->manager
, name
);
794 return unit_merge(u
, other
);
796 return unit_add_name(u
, name
);
799 Unit
* unit_follow_merge(Unit
*u
) {
802 while (u
->load_state
== UNIT_MERGED
)
803 assert_se(u
= u
->merged_into
);
808 int unit_add_exec_dependencies(Unit
*u
, ExecContext
*c
) {
814 if (c
->working_directory
) {
815 r
= unit_require_mounts_for(u
, c
->working_directory
);
820 if (c
->root_directory
) {
821 r
= unit_require_mounts_for(u
, c
->root_directory
);
826 if (!MANAGER_IS_SYSTEM(u
->manager
))
829 if (c
->private_tmp
) {
830 r
= unit_require_mounts_for(u
, "/tmp");
834 r
= unit_require_mounts_for(u
, "/var/tmp");
839 if (c
->std_output
!= EXEC_OUTPUT_KMSG
&&
840 c
->std_output
!= EXEC_OUTPUT_SYSLOG
&&
841 c
->std_output
!= EXEC_OUTPUT_JOURNAL
&&
842 c
->std_output
!= EXEC_OUTPUT_KMSG_AND_CONSOLE
&&
843 c
->std_output
!= EXEC_OUTPUT_SYSLOG_AND_CONSOLE
&&
844 c
->std_output
!= EXEC_OUTPUT_JOURNAL_AND_CONSOLE
&&
845 c
->std_error
!= EXEC_OUTPUT_KMSG
&&
846 c
->std_error
!= EXEC_OUTPUT_SYSLOG
&&
847 c
->std_error
!= EXEC_OUTPUT_JOURNAL
&&
848 c
->std_error
!= EXEC_OUTPUT_KMSG_AND_CONSOLE
&&
849 c
->std_error
!= EXEC_OUTPUT_JOURNAL_AND_CONSOLE
&&
850 c
->std_error
!= EXEC_OUTPUT_SYSLOG_AND_CONSOLE
)
853 /* If syslog or kernel logging is requested, make sure our own
854 * logging daemon is run first. */
856 r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_JOURNALD_SOCKET
, NULL
, true);
863 const char *unit_description(Unit
*u
) {
867 return u
->description
;
872 void unit_dump(Unit
*u
, FILE *f
, const char *prefix
) {
878 timestamp0
[FORMAT_TIMESTAMP_MAX
],
879 timestamp1
[FORMAT_TIMESTAMP_MAX
],
880 timestamp2
[FORMAT_TIMESTAMP_MAX
],
881 timestamp3
[FORMAT_TIMESTAMP_MAX
],
882 timestamp4
[FORMAT_TIMESTAMP_MAX
],
883 timespan
[FORMAT_TIMESPAN_MAX
];
885 _cleanup_set_free_ Set
*following_set
= NULL
;
889 assert(u
->type
>= 0);
891 prefix
= strempty(prefix
);
892 prefix2
= strjoina(prefix
, "\t");
896 "%s\tDescription: %s\n"
898 "%s\tUnit Load State: %s\n"
899 "%s\tUnit Active State: %s\n"
900 "%s\tState Change Timestamp: %s\n"
901 "%s\tInactive Exit Timestamp: %s\n"
902 "%s\tActive Enter Timestamp: %s\n"
903 "%s\tActive Exit Timestamp: %s\n"
904 "%s\tInactive Enter Timestamp: %s\n"
905 "%s\tGC Check Good: %s\n"
906 "%s\tNeed Daemon Reload: %s\n"
907 "%s\tTransient: %s\n"
910 "%s\tCGroup realized: %s\n"
911 "%s\tCGroup mask: 0x%x\n"
912 "%s\tCGroup members mask: 0x%x\n",
914 prefix
, unit_description(u
),
915 prefix
, strna(u
->instance
),
916 prefix
, unit_load_state_to_string(u
->load_state
),
917 prefix
, unit_active_state_to_string(unit_active_state(u
)),
918 prefix
, strna(format_timestamp(timestamp0
, sizeof(timestamp0
), u
->state_change_timestamp
.realtime
)),
919 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->inactive_exit_timestamp
.realtime
)),
920 prefix
, strna(format_timestamp(timestamp2
, sizeof(timestamp2
), u
->active_enter_timestamp
.realtime
)),
921 prefix
, strna(format_timestamp(timestamp3
, sizeof(timestamp3
), u
->active_exit_timestamp
.realtime
)),
922 prefix
, strna(format_timestamp(timestamp4
, sizeof(timestamp4
), u
->inactive_enter_timestamp
.realtime
)),
923 prefix
, yes_no(unit_check_gc(u
)),
924 prefix
, yes_no(unit_need_daemon_reload(u
)),
925 prefix
, yes_no(u
->transient
),
926 prefix
, strna(unit_slice_name(u
)),
927 prefix
, strna(u
->cgroup_path
),
928 prefix
, yes_no(u
->cgroup_realized
),
929 prefix
, u
->cgroup_realized_mask
,
930 prefix
, u
->cgroup_members_mask
);
932 SET_FOREACH(t
, u
->names
, i
)
933 fprintf(f
, "%s\tName: %s\n", prefix
, t
);
935 STRV_FOREACH(j
, u
->documentation
)
936 fprintf(f
, "%s\tDocumentation: %s\n", prefix
, *j
);
938 following
= unit_following(u
);
940 fprintf(f
, "%s\tFollowing: %s\n", prefix
, following
->id
);
942 r
= unit_following_set(u
, &following_set
);
946 SET_FOREACH(other
, following_set
, i
)
947 fprintf(f
, "%s\tFollowing Set Member: %s\n", prefix
, other
->id
);
950 if (u
->fragment_path
)
951 fprintf(f
, "%s\tFragment Path: %s\n", prefix
, u
->fragment_path
);
954 fprintf(f
, "%s\tSource Path: %s\n", prefix
, u
->source_path
);
956 STRV_FOREACH(j
, u
->dropin_paths
)
957 fprintf(f
, "%s\tDropIn Path: %s\n", prefix
, *j
);
959 if (u
->job_timeout
!= USEC_INFINITY
)
960 fprintf(f
, "%s\tJob Timeout: %s\n", prefix
, format_timespan(timespan
, sizeof(timespan
), u
->job_timeout
, 0));
962 if (u
->job_timeout_action
!= FAILURE_ACTION_NONE
)
963 fprintf(f
, "%s\tJob Timeout Action: %s\n", prefix
, failure_action_to_string(u
->job_timeout_action
));
965 if (u
->job_timeout_reboot_arg
)
966 fprintf(f
, "%s\tJob Timeout Reboot Argument: %s\n", prefix
, u
->job_timeout_reboot_arg
);
968 condition_dump_list(u
->conditions
, f
, prefix
, condition_type_to_string
);
969 condition_dump_list(u
->asserts
, f
, prefix
, assert_type_to_string
);
971 if (dual_timestamp_is_set(&u
->condition_timestamp
))
973 "%s\tCondition Timestamp: %s\n"
974 "%s\tCondition Result: %s\n",
975 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->condition_timestamp
.realtime
)),
976 prefix
, yes_no(u
->condition_result
));
978 if (dual_timestamp_is_set(&u
->assert_timestamp
))
980 "%s\tAssert Timestamp: %s\n"
981 "%s\tAssert Result: %s\n",
982 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->assert_timestamp
.realtime
)),
983 prefix
, yes_no(u
->assert_result
));
985 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
988 SET_FOREACH(other
, u
->dependencies
[d
], i
)
989 fprintf(f
, "%s\t%s: %s\n", prefix
, unit_dependency_to_string(d
), other
->id
);
992 if (!strv_isempty(u
->requires_mounts_for
)) {
994 "%s\tRequiresMountsFor:", prefix
);
996 STRV_FOREACH(j
, u
->requires_mounts_for
)
997 fprintf(f
, " %s", *j
);
1002 if (u
->load_state
== UNIT_LOADED
) {
1005 "%s\tStopWhenUnneeded: %s\n"
1006 "%s\tRefuseManualStart: %s\n"
1007 "%s\tRefuseManualStop: %s\n"
1008 "%s\tDefaultDependencies: %s\n"
1009 "%s\tOnFailureJobMode: %s\n"
1010 "%s\tIgnoreOnIsolate: %s\n",
1011 prefix
, yes_no(u
->stop_when_unneeded
),
1012 prefix
, yes_no(u
->refuse_manual_start
),
1013 prefix
, yes_no(u
->refuse_manual_stop
),
1014 prefix
, yes_no(u
->default_dependencies
),
1015 prefix
, job_mode_to_string(u
->on_failure_job_mode
),
1016 prefix
, yes_no(u
->ignore_on_isolate
));
1018 if (UNIT_VTABLE(u
)->dump
)
1019 UNIT_VTABLE(u
)->dump(u
, f
, prefix2
);
1021 } else if (u
->load_state
== UNIT_MERGED
)
1023 "%s\tMerged into: %s\n",
1024 prefix
, u
->merged_into
->id
);
1025 else if (u
->load_state
== UNIT_ERROR
)
1026 fprintf(f
, "%s\tLoad Error Code: %s\n", prefix
, strerror(-u
->load_error
));
1030 job_dump(u
->job
, f
, prefix2
);
1033 job_dump(u
->nop_job
, f
, prefix2
);
1037 /* Common implementation for multiple backends */
1038 int unit_load_fragment_and_dropin(Unit
*u
) {
1043 /* Load a .{service,socket,...} file */
1044 r
= unit_load_fragment(u
);
1048 if (u
->load_state
== UNIT_STUB
)
1051 /* Load drop-in directory data */
1052 r
= unit_load_dropin(unit_follow_merge(u
));
1059 /* Common implementation for multiple backends */
1060 int unit_load_fragment_and_dropin_optional(Unit
*u
) {
1065 /* Same as unit_load_fragment_and_dropin(), but whether
1066 * something can be loaded or not doesn't matter. */
1068 /* Load a .service file */
1069 r
= unit_load_fragment(u
);
1073 if (u
->load_state
== UNIT_STUB
)
1074 u
->load_state
= UNIT_LOADED
;
1076 /* Load drop-in directory data */
1077 r
= unit_load_dropin(unit_follow_merge(u
));
1084 int unit_add_default_target_dependency(Unit
*u
, Unit
*target
) {
1088 if (target
->type
!= UNIT_TARGET
)
1091 /* Only add the dependency if both units are loaded, so that
1092 * that loop check below is reliable */
1093 if (u
->load_state
!= UNIT_LOADED
||
1094 target
->load_state
!= UNIT_LOADED
)
1097 /* If either side wants no automatic dependencies, then let's
1099 if (!u
->default_dependencies
||
1100 !target
->default_dependencies
)
1103 /* Don't create loops */
1104 if (set_get(target
->dependencies
[UNIT_BEFORE
], u
))
1107 return unit_add_dependency(target
, UNIT_AFTER
, u
, true);
1110 static int unit_add_target_dependencies(Unit
*u
) {
1112 static const UnitDependency deps
[] = {
1126 for (k
= 0; k
< ELEMENTSOF(deps
); k
++)
1127 SET_FOREACH(target
, u
->dependencies
[deps
[k
]], i
) {
1128 r
= unit_add_default_target_dependency(u
, target
);
1136 static int unit_add_slice_dependencies(Unit
*u
) {
1139 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
1142 if (UNIT_ISSET(u
->slice
))
1143 return unit_add_two_dependencies(u
, UNIT_AFTER
, UNIT_REQUIRES
, UNIT_DEREF(u
->slice
), true);
1145 if (unit_has_name(u
, SPECIAL_ROOT_SLICE
))
1148 return unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_ROOT_SLICE
, NULL
, true);
1151 static int unit_add_mount_dependencies(Unit
*u
) {
1157 STRV_FOREACH(i
, u
->requires_mounts_for
) {
1158 char prefix
[strlen(*i
) + 1];
1160 PATH_FOREACH_PREFIX_MORE(prefix
, *i
) {
1161 _cleanup_free_
char *p
= NULL
;
1164 r
= unit_name_from_path(prefix
, ".mount", &p
);
1168 m
= manager_get_unit(u
->manager
, p
);
1170 /* Make sure to load the mount unit if
1171 * it exists. If so the dependencies
1172 * on this unit will be added later
1173 * during the loading of the mount
1175 (void) manager_load_unit_prepare(u
->manager
, p
, NULL
, NULL
, &m
);
1181 if (m
->load_state
!= UNIT_LOADED
)
1184 r
= unit_add_dependency(u
, UNIT_AFTER
, m
, true);
1188 if (m
->fragment_path
) {
1189 r
= unit_add_dependency(u
, UNIT_REQUIRES
, m
, true);
1199 static int unit_add_startup_units(Unit
*u
) {
1203 c
= unit_get_cgroup_context(u
);
1207 if (c
->startup_cpu_shares
== CGROUP_CPU_SHARES_INVALID
&&
1208 c
->startup_blockio_weight
== CGROUP_BLKIO_WEIGHT_INVALID
)
1211 r
= set_ensure_allocated(&u
->manager
->startup_units
, NULL
);
1215 return set_put(u
->manager
->startup_units
, u
);
1218 int unit_load(Unit
*u
) {
1223 if (u
->in_load_queue
) {
1224 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
1225 u
->in_load_queue
= false;
1228 if (u
->type
== _UNIT_TYPE_INVALID
)
1231 if (u
->load_state
!= UNIT_STUB
)
1234 if (UNIT_VTABLE(u
)->load
) {
1235 r
= UNIT_VTABLE(u
)->load(u
);
1240 if (u
->load_state
== UNIT_STUB
) {
1245 if (u
->load_state
== UNIT_LOADED
) {
1247 r
= unit_add_target_dependencies(u
);
1251 r
= unit_add_slice_dependencies(u
);
1255 r
= unit_add_mount_dependencies(u
);
1259 r
= unit_add_startup_units(u
);
1263 if (u
->on_failure_job_mode
== JOB_ISOLATE
&& set_size(u
->dependencies
[UNIT_ON_FAILURE
]) > 1) {
1264 log_unit_error(u
, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing.");
1269 unit_update_cgroup_members_masks(u
);
1272 assert((u
->load_state
!= UNIT_MERGED
) == !u
->merged_into
);
1274 unit_add_to_dbus_queue(unit_follow_merge(u
));
1275 unit_add_to_gc_queue(u
);
1280 u
->load_state
= u
->load_state
== UNIT_STUB
? UNIT_NOT_FOUND
: UNIT_ERROR
;
1282 unit_add_to_dbus_queue(u
);
1283 unit_add_to_gc_queue(u
);
1285 log_unit_debug_errno(u
, r
, "Failed to load configuration: %m");
1290 static bool unit_condition_test_list(Unit
*u
, Condition
*first
, const char *(*to_string
)(ConditionType t
)) {
1297 /* If the condition list is empty, then it is true */
1301 /* Otherwise, if all of the non-trigger conditions apply and
1302 * if any of the trigger conditions apply (unless there are
1303 * none) we return true */
1304 LIST_FOREACH(conditions
, c
, first
) {
1307 r
= condition_test(c
);
1310 "Couldn't determine result for %s=%s%s%s, assuming failed: %m",
1312 c
->trigger
? "|" : "",
1313 c
->negate
? "!" : "",
1319 c
->trigger
? "|" : "",
1320 c
->negate
? "!" : "",
1322 condition_result_to_string(c
->result
));
1324 if (!c
->trigger
&& r
<= 0)
1327 if (c
->trigger
&& triggered
<= 0)
1331 return triggered
!= 0;
1334 static bool unit_condition_test(Unit
*u
) {
1337 dual_timestamp_get(&u
->condition_timestamp
);
1338 u
->condition_result
= unit_condition_test_list(u
, u
->conditions
, condition_type_to_string
);
1340 return u
->condition_result
;
1343 static bool unit_assert_test(Unit
*u
) {
1346 dual_timestamp_get(&u
->assert_timestamp
);
1347 u
->assert_result
= unit_condition_test_list(u
, u
->asserts
, assert_type_to_string
);
1349 return u
->assert_result
;
1352 void unit_status_printf(Unit
*u
, const char *status
, const char *unit_status_msg_format
) {
1353 DISABLE_WARNING_FORMAT_NONLITERAL
;
1354 manager_status_printf(u
->manager
, STATUS_TYPE_NORMAL
, status
, unit_status_msg_format
, unit_description(u
));
1358 _pure_
static const char* unit_get_status_message_format(Unit
*u
, JobType t
) {
1360 const UnitStatusMessageFormats
*format_table
;
1363 assert(IN_SET(t
, JOB_START
, JOB_STOP
, JOB_RELOAD
));
1365 if (t
!= JOB_RELOAD
) {
1366 format_table
= &UNIT_VTABLE(u
)->status_message_formats
;
1368 format
= format_table
->starting_stopping
[t
== JOB_STOP
];
1374 /* Return generic strings */
1376 return "Starting %s.";
1377 else if (t
== JOB_STOP
)
1378 return "Stopping %s.";
1380 return "Reloading %s.";
1383 static void unit_status_print_starting_stopping(Unit
*u
, JobType t
) {
1388 /* Reload status messages have traditionally not been printed to console. */
1389 if (!IN_SET(t
, JOB_START
, JOB_STOP
))
1392 format
= unit_get_status_message_format(u
, t
);
1394 DISABLE_WARNING_FORMAT_NONLITERAL
;
1395 unit_status_printf(u
, "", format
);
1399 static void unit_status_log_starting_stopping_reloading(Unit
*u
, JobType t
) {
1406 if (!IN_SET(t
, JOB_START
, JOB_STOP
, JOB_RELOAD
))
1409 if (log_on_console())
1412 /* We log status messages for all units and all operations. */
1414 format
= unit_get_status_message_format(u
, t
);
1416 DISABLE_WARNING_FORMAT_NONLITERAL
;
1417 xsprintf(buf
, format
, unit_description(u
));
1420 mid
= t
== JOB_START
? SD_MESSAGE_UNIT_STARTING
:
1421 t
== JOB_STOP
? SD_MESSAGE_UNIT_STOPPING
:
1422 SD_MESSAGE_UNIT_RELOADING
;
1424 /* Note that we deliberately use LOG_MESSAGE() instead of
1425 * LOG_UNIT_MESSAGE() here, since this is supposed to mimic
1426 * closely what is written to screen using the status output,
1427 * which is supposed the highest level, friendliest output
1428 * possible, which means we should avoid the low-level unit
1430 log_struct(LOG_INFO
,
1431 LOG_MESSAGE_ID(mid
),
1433 LOG_MESSAGE("%s", buf
),
1437 void unit_status_emit_starting_stopping_reloading(Unit
*u
, JobType t
) {
1440 assert(t
< _JOB_TYPE_MAX
);
1442 unit_status_log_starting_stopping_reloading(u
, t
);
1443 unit_status_print_starting_stopping(u
, t
);
1446 static int unit_start_limit_test(Unit
*u
) {
1449 if (ratelimit_test(&u
->start_limit
)) {
1450 u
->start_limit_hit
= false;
1454 log_unit_warning(u
, "Start request repeated too quickly.");
1455 u
->start_limit_hit
= true;
1457 return failure_action(u
->manager
, u
->start_limit_action
, u
->reboot_arg
);
1461 * -EBADR: This unit type does not support starting.
1462 * -EALREADY: Unit is already started.
1463 * -EAGAIN: An operation is already in progress. Retry later.
1464 * -ECANCELED: Too many requests for now.
1465 * -EPROTO: Assert failed
1466 * -EINVAL: Unit not loaded
1467 * -EOPNOTSUPP: Unit type not supported
1469 int unit_start(Unit
*u
) {
1470 UnitActiveState state
;
1476 /* If this is already started, then this will succeed. Note
1477 * that this will even succeed if this unit is not startable
1478 * by the user. This is relied on to detect when we need to
1479 * wait for units and when waiting is finished. */
1480 state
= unit_active_state(u
);
1481 if (UNIT_IS_ACTIVE_OR_RELOADING(state
))
1484 /* Make sure we don't enter a busy loop of some kind. */
1485 r
= unit_start_limit_test(u
);
1489 /* Units that aren't loaded cannot be started */
1490 if (u
->load_state
!= UNIT_LOADED
)
1493 /* If the conditions failed, don't do anything at all. If we
1494 * already are activating this call might still be useful to
1495 * speed up activation in case there is some hold-off time,
1496 * but we don't want to recheck the condition in that case. */
1497 if (state
!= UNIT_ACTIVATING
&&
1498 !unit_condition_test(u
)) {
1499 log_unit_debug(u
, "Starting requested but condition failed. Not starting unit.");
1503 /* If the asserts failed, fail the entire job */
1504 if (state
!= UNIT_ACTIVATING
&&
1505 !unit_assert_test(u
)) {
1506 log_unit_notice(u
, "Starting requested but asserts failed.");
1510 /* Units of types that aren't supported cannot be
1511 * started. Note that we do this test only after the condition
1512 * checks, so that we rather return condition check errors
1513 * (which are usually not considered a true failure) than "not
1514 * supported" errors (which are considered a failure).
1516 if (!unit_supported(u
))
1519 /* Forward to the main object, if we aren't it. */
1520 following
= unit_following(u
);
1522 log_unit_debug(u
, "Redirecting start request from %s to %s.", u
->id
, following
->id
);
1523 return unit_start(following
);
1526 /* If it is stopped, but we cannot start it, then fail */
1527 if (!UNIT_VTABLE(u
)->start
)
1530 /* We don't suppress calls to ->start() here when we are
1531 * already starting, to allow this request to be used as a
1532 * "hurry up" call, for example when the unit is in some "auto
1533 * restart" state where it waits for a holdoff timer to elapse
1534 * before it will start again. */
1536 unit_add_to_dbus_queue(u
);
1538 return UNIT_VTABLE(u
)->start(u
);
1541 bool unit_can_start(Unit
*u
) {
1544 if (u
->load_state
!= UNIT_LOADED
)
1547 if (!unit_supported(u
))
1550 return !!UNIT_VTABLE(u
)->start
;
1553 bool unit_can_isolate(Unit
*u
) {
1556 return unit_can_start(u
) &&
1561 * -EBADR: This unit type does not support stopping.
1562 * -EALREADY: Unit is already stopped.
1563 * -EAGAIN: An operation is already in progress. Retry later.
1565 int unit_stop(Unit
*u
) {
1566 UnitActiveState state
;
1571 state
= unit_active_state(u
);
1572 if (UNIT_IS_INACTIVE_OR_FAILED(state
))
1575 following
= unit_following(u
);
1577 log_unit_debug(u
, "Redirecting stop request from %s to %s.", u
->id
, following
->id
);
1578 return unit_stop(following
);
1581 if (!UNIT_VTABLE(u
)->stop
)
1584 unit_add_to_dbus_queue(u
);
1586 return UNIT_VTABLE(u
)->stop(u
);
1590 * -EBADR: This unit type does not support reloading.
1591 * -ENOEXEC: Unit is not started.
1592 * -EAGAIN: An operation is already in progress. Retry later.
1594 int unit_reload(Unit
*u
) {
1595 UnitActiveState state
;
1600 if (u
->load_state
!= UNIT_LOADED
)
1603 if (!unit_can_reload(u
))
1606 state
= unit_active_state(u
);
1607 if (state
== UNIT_RELOADING
)
1610 if (state
!= UNIT_ACTIVE
) {
1611 log_unit_warning(u
, "Unit cannot be reloaded because it is inactive.");
1615 following
= unit_following(u
);
1617 log_unit_debug(u
, "Redirecting reload request from %s to %s.", u
->id
, following
->id
);
1618 return unit_reload(following
);
1621 unit_add_to_dbus_queue(u
);
1623 return UNIT_VTABLE(u
)->reload(u
);
1626 bool unit_can_reload(Unit
*u
) {
1629 if (!UNIT_VTABLE(u
)->reload
)
1632 if (!UNIT_VTABLE(u
)->can_reload
)
1635 return UNIT_VTABLE(u
)->can_reload(u
);
1638 static void unit_check_unneeded(Unit
*u
) {
1640 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
1642 static const UnitDependency needed_dependencies
[] = {
1656 /* If this service shall be shut down when unneeded then do
1659 if (!u
->stop_when_unneeded
)
1662 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
1665 for (j
= 0; j
< ELEMENTSOF(needed_dependencies
); j
++)
1666 SET_FOREACH(other
, u
->dependencies
[needed_dependencies
[j
]], i
)
1667 if (unit_active_or_pending(other
))
1670 /* If stopping a unit fails continously we might enter a stop
1671 * loop here, hence stop acting on the service being
1672 * unnecessary after a while. */
1673 if (!ratelimit_test(&u
->auto_stop_ratelimit
)) {
1674 log_unit_warning(u
, "Unit not needed anymore, but not stopping since we tried this too often recently.");
1678 log_unit_info(u
, "Unit not needed anymore. Stopping.");
1680 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
1681 r
= manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_FAIL
, &error
, NULL
);
1683 log_unit_warning_errno(u
, r
, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error
, r
));
1686 static void unit_check_binds_to(Unit
*u
) {
1687 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
1698 if (unit_active_state(u
) != UNIT_ACTIVE
)
1701 SET_FOREACH(other
, u
->dependencies
[UNIT_BINDS_TO
], i
) {
1705 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
1715 /* If stopping a unit fails continously we might enter a stop
1716 * loop here, hence stop acting on the service being
1717 * unnecessary after a while. */
1718 if (!ratelimit_test(&u
->auto_stop_ratelimit
)) {
1719 log_unit_warning(u
, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other
->id
);
1724 log_unit_info(u
, "Unit is bound to inactive unit %s. Stopping, too.", other
->id
);
1726 /* A unit we need to run is gone. Sniff. Let's stop this. */
1727 r
= manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_FAIL
, &error
, NULL
);
1729 log_unit_warning_errno(u
, r
, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error
, r
));
1732 static void retroactively_start_dependencies(Unit
*u
) {
1737 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)));
1739 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUIRES
], i
)
1740 if (!set_get(u
->dependencies
[UNIT_AFTER
], other
) &&
1741 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
1742 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, NULL
, NULL
);
1744 SET_FOREACH(other
, u
->dependencies
[UNIT_BINDS_TO
], i
)
1745 if (!set_get(u
->dependencies
[UNIT_AFTER
], other
) &&
1746 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
1747 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, NULL
, NULL
);
1749 SET_FOREACH(other
, u
->dependencies
[UNIT_WANTS
], i
)
1750 if (!set_get(u
->dependencies
[UNIT_AFTER
], other
) &&
1751 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
1752 manager_add_job(u
->manager
, JOB_START
, other
, JOB_FAIL
, NULL
, NULL
);
1754 SET_FOREACH(other
, u
->dependencies
[UNIT_CONFLICTS
], i
)
1755 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1756 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
);
1758 SET_FOREACH(other
, u
->dependencies
[UNIT_CONFLICTED_BY
], i
)
1759 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1760 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
);
1763 static void retroactively_stop_dependencies(Unit
*u
) {
1768 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
1770 /* Pull down units which are bound to us recursively if enabled */
1771 SET_FOREACH(other
, u
->dependencies
[UNIT_BOUND_BY
], i
)
1772 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1773 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
);
1776 static void check_unneeded_dependencies(Unit
*u
) {
1781 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
1783 /* Garbage collect services that might not be needed anymore, if enabled */
1784 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUIRES
], i
)
1785 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1786 unit_check_unneeded(other
);
1787 SET_FOREACH(other
, u
->dependencies
[UNIT_WANTS
], i
)
1788 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1789 unit_check_unneeded(other
);
1790 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUISITE
], i
)
1791 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1792 unit_check_unneeded(other
);
1793 SET_FOREACH(other
, u
->dependencies
[UNIT_BINDS_TO
], i
)
1794 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1795 unit_check_unneeded(other
);
1798 void unit_start_on_failure(Unit
*u
) {
1804 if (set_size(u
->dependencies
[UNIT_ON_FAILURE
]) <= 0)
1807 log_unit_info(u
, "Triggering OnFailure= dependencies.");
1809 SET_FOREACH(other
, u
->dependencies
[UNIT_ON_FAILURE
], i
) {
1812 r
= manager_add_job(u
->manager
, JOB_START
, other
, u
->on_failure_job_mode
, NULL
, NULL
);
1814 log_unit_error_errno(u
, r
, "Failed to enqueue OnFailure= job: %m");
1818 void unit_trigger_notify(Unit
*u
) {
1824 SET_FOREACH(other
, u
->dependencies
[UNIT_TRIGGERED_BY
], i
)
1825 if (UNIT_VTABLE(other
)->trigger_notify
)
1826 UNIT_VTABLE(other
)->trigger_notify(other
, u
);
1829 void unit_notify(Unit
*u
, UnitActiveState os
, UnitActiveState ns
, bool reload_success
) {
1834 assert(os
< _UNIT_ACTIVE_STATE_MAX
);
1835 assert(ns
< _UNIT_ACTIVE_STATE_MAX
);
1837 /* Note that this is called for all low-level state changes,
1838 * even if they might map to the same high-level
1839 * UnitActiveState! That means that ns == os is an expected
1840 * behavior here. For example: if a mount point is remounted
1841 * this function will be called too! */
1845 /* Update timestamps for state changes */
1846 if (!MANAGER_IS_RELOADING(m
)) {
1847 dual_timestamp_get(&u
->state_change_timestamp
);
1849 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && !UNIT_IS_INACTIVE_OR_FAILED(ns
))
1850 u
->inactive_exit_timestamp
= u
->state_change_timestamp
;
1851 else if (!UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_INACTIVE_OR_FAILED(ns
))
1852 u
->inactive_enter_timestamp
= u
->state_change_timestamp
;
1854 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
) && UNIT_IS_ACTIVE_OR_RELOADING(ns
))
1855 u
->active_enter_timestamp
= u
->state_change_timestamp
;
1856 else if (UNIT_IS_ACTIVE_OR_RELOADING(os
) && !UNIT_IS_ACTIVE_OR_RELOADING(ns
))
1857 u
->active_exit_timestamp
= u
->state_change_timestamp
;
1860 /* Keep track of failed units */
1861 (void) manager_update_failed_units(u
->manager
, u
, ns
== UNIT_FAILED
);
1863 /* Make sure the cgroup is always removed when we become inactive */
1864 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
1865 unit_prune_cgroup(u
);
1867 /* Note that this doesn't apply to RemainAfterExit services exiting
1868 * successfully, since there's no change of state in that case. Which is
1869 * why it is handled in service_set_state() */
1870 if (UNIT_IS_INACTIVE_OR_FAILED(os
) != UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
1873 ec
= unit_get_exec_context(u
);
1874 if (ec
&& exec_context_may_touch_console(ec
)) {
1875 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
1878 if (m
->n_on_console
== 0)
1879 /* unset no_console_output flag, since the console is free */
1880 m
->no_console_output
= false;
1889 if (u
->job
->state
== JOB_WAITING
)
1891 /* So we reached a different state for this
1892 * job. Let's see if we can run it now if it
1893 * failed previously due to EAGAIN. */
1894 job_add_to_run_queue(u
->job
);
1896 /* Let's check whether this state change constitutes a
1897 * finished job, or maybe contradicts a running job and
1898 * hence needs to invalidate jobs. */
1900 switch (u
->job
->type
) {
1903 case JOB_VERIFY_ACTIVE
:
1905 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
))
1906 job_finish_and_invalidate(u
->job
, JOB_DONE
, true);
1907 else if (u
->job
->state
== JOB_RUNNING
&& ns
!= UNIT_ACTIVATING
) {
1910 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
1911 job_finish_and_invalidate(u
->job
, ns
== UNIT_FAILED
? JOB_FAILED
: JOB_DONE
, true);
1917 case JOB_RELOAD_OR_START
:
1918 case JOB_TRY_RELOAD
:
1920 if (u
->job
->state
== JOB_RUNNING
) {
1921 if (ns
== UNIT_ACTIVE
)
1922 job_finish_and_invalidate(u
->job
, reload_success
? JOB_DONE
: JOB_FAILED
, true);
1923 else if (ns
!= UNIT_ACTIVATING
&& ns
!= UNIT_RELOADING
) {
1926 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
1927 job_finish_and_invalidate(u
->job
, ns
== UNIT_FAILED
? JOB_FAILED
: JOB_DONE
, true);
1935 case JOB_TRY_RESTART
:
1937 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
1938 job_finish_and_invalidate(u
->job
, JOB_DONE
, true);
1939 else if (u
->job
->state
== JOB_RUNNING
&& ns
!= UNIT_DEACTIVATING
) {
1941 job_finish_and_invalidate(u
->job
, JOB_FAILED
, true);
1947 assert_not_reached("Job type unknown");
1953 if (!MANAGER_IS_RELOADING(m
)) {
1955 /* If this state change happened without being
1956 * requested by a job, then let's retroactively start
1957 * or stop dependencies. We skip that step when
1958 * deserializing, since we don't want to create any
1959 * additional jobs just because something is already
1963 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns
))
1964 retroactively_start_dependencies(u
);
1965 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os
) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
1966 retroactively_stop_dependencies(u
);
1969 /* stop unneeded units regardless if going down was expected or not */
1970 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
1971 check_unneeded_dependencies(u
);
1973 if (ns
!= os
&& ns
== UNIT_FAILED
) {
1974 log_unit_notice(u
, "Unit entered failed state.");
1975 unit_start_on_failure(u
);
1979 /* Some names are special */
1980 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
)) {
1982 if (unit_has_name(u
, SPECIAL_DBUS_SERVICE
))
1983 /* The bus might have just become available,
1984 * hence try to connect to it, if we aren't
1988 if (u
->type
== UNIT_SERVICE
&&
1989 !UNIT_IS_ACTIVE_OR_RELOADING(os
) &&
1990 !MANAGER_IS_RELOADING(m
)) {
1991 /* Write audit record if we have just finished starting up */
1992 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_START
, true);
1996 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
))
1997 manager_send_unit_plymouth(m
, u
);
2001 /* We don't care about D-Bus here, since we'll get an
2002 * asynchronous notification for it anyway. */
2004 if (u
->type
== UNIT_SERVICE
&&
2005 UNIT_IS_INACTIVE_OR_FAILED(ns
) &&
2006 !UNIT_IS_INACTIVE_OR_FAILED(os
) &&
2007 !MANAGER_IS_RELOADING(m
)) {
2009 /* Hmm, if there was no start record written
2010 * write it now, so that we always have a nice
2013 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_START
, ns
== UNIT_INACTIVE
);
2015 if (ns
== UNIT_INACTIVE
)
2016 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_STOP
, true);
2018 /* Write audit record if we have just finished shutting down */
2019 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_STOP
, ns
== UNIT_INACTIVE
);
2021 u
->in_audit
= false;
2025 manager_recheck_journal(m
);
2026 unit_trigger_notify(u
);
2028 if (!MANAGER_IS_RELOADING(u
->manager
)) {
2029 /* Maybe we finished startup and are now ready for
2030 * being stopped because unneeded? */
2031 unit_check_unneeded(u
);
2033 /* Maybe we finished startup, but something we needed
2034 * has vanished? Let's die then. (This happens when
2035 * something BindsTo= to a Type=oneshot unit, as these
2036 * units go directly from starting to inactive,
2037 * without ever entering started.) */
2038 unit_check_binds_to(u
);
2041 unit_add_to_dbus_queue(u
);
2042 unit_add_to_gc_queue(u
);
2045 int unit_watch_pid(Unit
*u
, pid_t pid
) {
2051 /* Watch a specific PID. We only support one or two units
2052 * watching each PID for now, not more. */
2054 r
= set_ensure_allocated(&u
->pids
, NULL
);
2058 r
= hashmap_ensure_allocated(&u
->manager
->watch_pids1
, NULL
);
2062 r
= hashmap_put(u
->manager
->watch_pids1
, PID_TO_PTR(pid
), u
);
2064 r
= hashmap_ensure_allocated(&u
->manager
->watch_pids2
, NULL
);
2068 r
= hashmap_put(u
->manager
->watch_pids2
, PID_TO_PTR(pid
), u
);
2071 q
= set_put(u
->pids
, PID_TO_PTR(pid
));
2078 void unit_unwatch_pid(Unit
*u
, pid_t pid
) {
2082 (void) hashmap_remove_value(u
->manager
->watch_pids1
, PID_TO_PTR(pid
), u
);
2083 (void) hashmap_remove_value(u
->manager
->watch_pids2
, PID_TO_PTR(pid
), u
);
2084 (void) set_remove(u
->pids
, PID_TO_PTR(pid
));
2087 void unit_unwatch_all_pids(Unit
*u
) {
2090 while (!set_isempty(u
->pids
))
2091 unit_unwatch_pid(u
, PTR_TO_PID(set_first(u
->pids
)));
2093 u
->pids
= set_free(u
->pids
);
2096 void unit_tidy_watch_pids(Unit
*u
, pid_t except1
, pid_t except2
) {
2102 /* Cleans dead PIDs from our list */
2104 SET_FOREACH(e
, u
->pids
, i
) {
2105 pid_t pid
= PTR_TO_PID(e
);
2107 if (pid
== except1
|| pid
== except2
)
2110 if (!pid_is_unwaited(pid
))
2111 unit_unwatch_pid(u
, pid
);
2115 bool unit_job_is_applicable(Unit
*u
, JobType j
) {
2117 assert(j
>= 0 && j
< _JOB_TYPE_MAX
);
2121 case JOB_VERIFY_ACTIVE
:
2128 case JOB_TRY_RESTART
:
2129 return unit_can_start(u
);
2132 case JOB_TRY_RELOAD
:
2133 return unit_can_reload(u
);
2135 case JOB_RELOAD_OR_START
:
2136 return unit_can_reload(u
) && unit_can_start(u
);
2139 assert_not_reached("Invalid job type");
2143 static void maybe_warn_about_dependency(Unit
*u
, const char *other
, UnitDependency dependency
) {
2146 /* Only warn about some unit types */
2147 if (!IN_SET(dependency
, UNIT_CONFLICTS
, UNIT_CONFLICTED_BY
, UNIT_BEFORE
, UNIT_AFTER
, UNIT_ON_FAILURE
, UNIT_TRIGGERS
, UNIT_TRIGGERED_BY
))
2150 if (streq_ptr(u
->id
, other
))
2151 log_unit_warning(u
, "Dependency %s=%s dropped", unit_dependency_to_string(dependency
), u
->id
);
2153 log_unit_warning(u
, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency
), strna(other
), u
->id
);
2156 int unit_add_dependency(Unit
*u
, UnitDependency d
, Unit
*other
, bool add_reference
) {
2158 static const UnitDependency inverse_table
[_UNIT_DEPENDENCY_MAX
] = {
2159 [UNIT_REQUIRES
] = UNIT_REQUIRED_BY
,
2160 [UNIT_WANTS
] = UNIT_WANTED_BY
,
2161 [UNIT_REQUISITE
] = UNIT_REQUISITE_OF
,
2162 [UNIT_BINDS_TO
] = UNIT_BOUND_BY
,
2163 [UNIT_PART_OF
] = UNIT_CONSISTS_OF
,
2164 [UNIT_REQUIRED_BY
] = UNIT_REQUIRES
,
2165 [UNIT_REQUISITE_OF
] = UNIT_REQUISITE
,
2166 [UNIT_WANTED_BY
] = UNIT_WANTS
,
2167 [UNIT_BOUND_BY
] = UNIT_BINDS_TO
,
2168 [UNIT_CONSISTS_OF
] = UNIT_PART_OF
,
2169 [UNIT_CONFLICTS
] = UNIT_CONFLICTED_BY
,
2170 [UNIT_CONFLICTED_BY
] = UNIT_CONFLICTS
,
2171 [UNIT_BEFORE
] = UNIT_AFTER
,
2172 [UNIT_AFTER
] = UNIT_BEFORE
,
2173 [UNIT_ON_FAILURE
] = _UNIT_DEPENDENCY_INVALID
,
2174 [UNIT_REFERENCES
] = UNIT_REFERENCED_BY
,
2175 [UNIT_REFERENCED_BY
] = UNIT_REFERENCES
,
2176 [UNIT_TRIGGERS
] = UNIT_TRIGGERED_BY
,
2177 [UNIT_TRIGGERED_BY
] = UNIT_TRIGGERS
,
2178 [UNIT_PROPAGATES_RELOAD_TO
] = UNIT_RELOAD_PROPAGATED_FROM
,
2179 [UNIT_RELOAD_PROPAGATED_FROM
] = UNIT_PROPAGATES_RELOAD_TO
,
2180 [UNIT_JOINS_NAMESPACE_OF
] = UNIT_JOINS_NAMESPACE_OF
,
2182 int r
, q
= 0, v
= 0, w
= 0;
2183 Unit
*orig_u
= u
, *orig_other
= other
;
2186 assert(d
>= 0 && d
< _UNIT_DEPENDENCY_MAX
);
2189 u
= unit_follow_merge(u
);
2190 other
= unit_follow_merge(other
);
2192 /* We won't allow dependencies on ourselves. We will not
2193 * consider them an error however. */
2195 maybe_warn_about_dependency(orig_u
, orig_other
->id
, d
);
2199 r
= set_ensure_allocated(&u
->dependencies
[d
], NULL
);
2203 if (inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
) {
2204 r
= set_ensure_allocated(&other
->dependencies
[inverse_table
[d
]], NULL
);
2209 if (add_reference
) {
2210 r
= set_ensure_allocated(&u
->dependencies
[UNIT_REFERENCES
], NULL
);
2214 r
= set_ensure_allocated(&other
->dependencies
[UNIT_REFERENCED_BY
], NULL
);
2219 q
= set_put(u
->dependencies
[d
], other
);
2223 if (inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
&& inverse_table
[d
] != d
) {
2224 v
= set_put(other
->dependencies
[inverse_table
[d
]], u
);
2231 if (add_reference
) {
2232 w
= set_put(u
->dependencies
[UNIT_REFERENCES
], other
);
2238 r
= set_put(other
->dependencies
[UNIT_REFERENCED_BY
], u
);
2243 unit_add_to_dbus_queue(u
);
2248 set_remove(u
->dependencies
[d
], other
);
2251 set_remove(other
->dependencies
[inverse_table
[d
]], u
);
2254 set_remove(u
->dependencies
[UNIT_REFERENCES
], other
);
2259 int unit_add_two_dependencies(Unit
*u
, UnitDependency d
, UnitDependency e
, Unit
*other
, bool add_reference
) {
2264 r
= unit_add_dependency(u
, d
, other
, add_reference
);
2268 return unit_add_dependency(u
, e
, other
, add_reference
);
2271 static int resolve_template(Unit
*u
, const char *name
, const char*path
, char **buf
, const char **ret
) {
2275 assert(name
|| path
);
2280 name
= basename(path
);
2282 if (!unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
2289 r
= unit_name_replace_instance(name
, u
->instance
, buf
);
2291 _cleanup_free_
char *i
= NULL
;
2293 r
= unit_name_to_prefix(u
->id
, &i
);
2297 r
= unit_name_replace_instance(name
, i
, buf
);
2306 int unit_add_dependency_by_name(Unit
*u
, UnitDependency d
, const char *name
, const char *path
, bool add_reference
) {
2307 _cleanup_free_
char *buf
= NULL
;
2312 assert(name
|| path
);
2314 r
= resolve_template(u
, name
, path
, &buf
, &name
);
2318 r
= manager_load_unit(u
->manager
, name
, path
, NULL
, &other
);
2322 return unit_add_dependency(u
, d
, other
, add_reference
);
2325 int unit_add_two_dependencies_by_name(Unit
*u
, UnitDependency d
, UnitDependency e
, const char *name
, const char *path
, bool add_reference
) {
2326 _cleanup_free_
char *buf
= NULL
;
2331 assert(name
|| path
);
2333 r
= resolve_template(u
, name
, path
, &buf
, &name
);
2337 r
= manager_load_unit(u
->manager
, name
, path
, NULL
, &other
);
2341 return unit_add_two_dependencies(u
, d
, e
, other
, add_reference
);
2344 int set_unit_path(const char *p
) {
2345 /* This is mostly for debug purposes */
2346 if (setenv("SYSTEMD_UNIT_PATH", p
, 1) < 0)
2352 char *unit_dbus_path(Unit
*u
) {
2358 return unit_dbus_path_from_name(u
->id
);
2361 int unit_set_slice(Unit
*u
, Unit
*slice
) {
2365 /* Sets the unit slice if it has not been set before. Is extra
2366 * careful, to only allow this for units that actually have a
2367 * cgroup context. Also, we don't allow to set this for slices
2368 * (since the parent slice is derived from the name). Make
2369 * sure the unit we set is actually a slice. */
2371 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
2374 if (u
->type
== UNIT_SLICE
)
2377 if (unit_active_state(u
) != UNIT_INACTIVE
)
2380 if (slice
->type
!= UNIT_SLICE
)
2383 if (unit_has_name(u
, SPECIAL_INIT_SCOPE
) &&
2384 !unit_has_name(slice
, SPECIAL_ROOT_SLICE
))
2387 if (UNIT_DEREF(u
->slice
) == slice
)
2390 if (UNIT_ISSET(u
->slice
))
2393 unit_ref_set(&u
->slice
, slice
);
2397 int unit_set_default_slice(Unit
*u
) {
2398 _cleanup_free_
char *b
= NULL
;
2399 const char *slice_name
;
2405 if (UNIT_ISSET(u
->slice
))
2409 _cleanup_free_
char *prefix
= NULL
, *escaped
= NULL
;
2411 /* Implicitly place all instantiated units in their
2412 * own per-template slice */
2414 r
= unit_name_to_prefix(u
->id
, &prefix
);
2418 /* The prefix is already escaped, but it might include
2419 * "-" which has a special meaning for slice units,
2420 * hence escape it here extra. */
2421 escaped
= unit_name_escape(prefix
);
2425 if (MANAGER_IS_SYSTEM(u
->manager
))
2426 b
= strjoin("system-", escaped
, ".slice", NULL
);
2428 b
= strappend(escaped
, ".slice");
2435 MANAGER_IS_SYSTEM(u
->manager
) && !unit_has_name(u
, SPECIAL_INIT_SCOPE
)
2436 ? SPECIAL_SYSTEM_SLICE
2437 : SPECIAL_ROOT_SLICE
;
2439 r
= manager_load_unit(u
->manager
, slice_name
, NULL
, NULL
, &slice
);
2443 return unit_set_slice(u
, slice
);
2446 const char *unit_slice_name(Unit
*u
) {
2449 if (!UNIT_ISSET(u
->slice
))
2452 return UNIT_DEREF(u
->slice
)->id
;
2455 int unit_load_related_unit(Unit
*u
, const char *type
, Unit
**_found
) {
2456 _cleanup_free_
char *t
= NULL
;
2463 r
= unit_name_change_suffix(u
->id
, type
, &t
);
2466 if (unit_has_name(u
, t
))
2469 r
= manager_load_unit(u
->manager
, t
, NULL
, NULL
, _found
);
2470 assert(r
< 0 || *_found
!= u
);
2474 static int signal_name_owner_changed(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
2475 const char *name
, *old_owner
, *new_owner
;
2482 r
= sd_bus_message_read(message
, "sss", &name
, &old_owner
, &new_owner
);
2484 bus_log_parse_error(r
);
2488 if (UNIT_VTABLE(u
)->bus_name_owner_change
)
2489 UNIT_VTABLE(u
)->bus_name_owner_change(u
, name
, old_owner
, new_owner
);
2494 int unit_install_bus_match(Unit
*u
, sd_bus
*bus
, const char *name
) {
2501 if (u
->match_bus_slot
)
2504 match
= strjoina("type='signal',"
2505 "sender='org.freedesktop.DBus',"
2506 "path='/org/freedesktop/DBus',"
2507 "interface='org.freedesktop.DBus',"
2508 "member='NameOwnerChanged',"
2509 "arg0='", name
, "'",
2512 return sd_bus_add_match(bus
, &u
->match_bus_slot
, match
, signal_name_owner_changed
, u
);
2515 int unit_watch_bus_name(Unit
*u
, const char *name
) {
2521 /* Watch a specific name on the bus. We only support one unit
2522 * watching each name for now. */
2524 if (u
->manager
->api_bus
) {
2525 /* If the bus is already available, install the match directly.
2526 * Otherwise, just put the name in the list. bus_setup_api() will take care later. */
2527 r
= unit_install_bus_match(u
, u
->manager
->api_bus
, name
);
2529 return log_warning_errno(r
, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name
);
2532 r
= hashmap_put(u
->manager
->watch_bus
, name
, u
);
2534 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
2535 return log_warning_errno(r
, "Failed to put bus name to hashmap: %m");
2541 void unit_unwatch_bus_name(Unit
*u
, const char *name
) {
2545 hashmap_remove_value(u
->manager
->watch_bus
, name
, u
);
2546 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
2549 bool unit_can_serialize(Unit
*u
) {
2552 return UNIT_VTABLE(u
)->serialize
&& UNIT_VTABLE(u
)->deserialize_item
;
2555 int unit_serialize(Unit
*u
, FILE *f
, FDSet
*fds
, bool serialize_jobs
) {
2562 if (unit_can_serialize(u
)) {
2565 r
= UNIT_VTABLE(u
)->serialize(u
, f
, fds
);
2569 rt
= unit_get_exec_runtime(u
);
2571 r
= exec_runtime_serialize(u
, rt
, f
, fds
);
2577 dual_timestamp_serialize(f
, "state-change-timestamp", &u
->state_change_timestamp
);
2579 dual_timestamp_serialize(f
, "inactive-exit-timestamp", &u
->inactive_exit_timestamp
);
2580 dual_timestamp_serialize(f
, "active-enter-timestamp", &u
->active_enter_timestamp
);
2581 dual_timestamp_serialize(f
, "active-exit-timestamp", &u
->active_exit_timestamp
);
2582 dual_timestamp_serialize(f
, "inactive-enter-timestamp", &u
->inactive_enter_timestamp
);
2584 dual_timestamp_serialize(f
, "condition-timestamp", &u
->condition_timestamp
);
2585 dual_timestamp_serialize(f
, "assert-timestamp", &u
->assert_timestamp
);
2587 if (dual_timestamp_is_set(&u
->condition_timestamp
))
2588 unit_serialize_item(u
, f
, "condition-result", yes_no(u
->condition_result
));
2590 if (dual_timestamp_is_set(&u
->assert_timestamp
))
2591 unit_serialize_item(u
, f
, "assert-result", yes_no(u
->assert_result
));
2593 unit_serialize_item(u
, f
, "transient", yes_no(u
->transient
));
2594 unit_serialize_item_format(u
, f
, "cpuacct-usage-base", "%" PRIu64
, u
->cpuacct_usage_base
);
2597 unit_serialize_item(u
, f
, "cgroup", u
->cgroup_path
);
2598 unit_serialize_item(u
, f
, "cgroup-realized", yes_no(u
->cgroup_realized
));
2600 if (serialize_jobs
) {
2602 fprintf(f
, "job\n");
2603 job_serialize(u
->job
, f
, fds
);
2607 fprintf(f
, "job\n");
2608 job_serialize(u
->nop_job
, f
, fds
);
2617 int unit_serialize_item(Unit
*u
, FILE *f
, const char *key
, const char *value
) {
2633 int unit_serialize_item_escaped(Unit
*u
, FILE *f
, const char *key
, const char *value
) {
2634 _cleanup_free_
char *c
= NULL
;
2655 int unit_serialize_item_fd(Unit
*u
, FILE *f
, FDSet
*fds
, const char *key
, int fd
) {
2665 copy
= fdset_put_dup(fds
, fd
);
2669 fprintf(f
, "%s=%i\n", key
, copy
);
2673 void unit_serialize_item_format(Unit
*u
, FILE *f
, const char *key
, const char *format
, ...) {
2684 va_start(ap
, format
);
2685 vfprintf(f
, format
, ap
);
2691 int unit_deserialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2692 ExecRuntime
**rt
= NULL
;
2700 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
2702 rt
= (ExecRuntime
**) ((uint8_t*) u
+ offset
);
2705 char line
[LINE_MAX
], *l
, *v
;
2708 if (!fgets(line
, sizeof(line
), f
)) {
2721 k
= strcspn(l
, "=");
2729 if (streq(l
, "job")) {
2731 /* new-style serialized job */
2738 r
= job_deserialize(j
, f
, fds
);
2744 r
= hashmap_put(u
->manager
->jobs
, UINT32_TO_PTR(j
->id
), j
);
2750 r
= job_install_deserialized(j
);
2752 hashmap_remove(u
->manager
->jobs
, UINT32_TO_PTR(j
->id
));
2756 } else /* legacy for pre-44 */
2757 log_unit_warning(u
, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v
);
2759 } else if (streq(l
, "state-change-timestamp")) {
2760 dual_timestamp_deserialize(v
, &u
->state_change_timestamp
);
2762 } else if (streq(l
, "inactive-exit-timestamp")) {
2763 dual_timestamp_deserialize(v
, &u
->inactive_exit_timestamp
);
2765 } else if (streq(l
, "active-enter-timestamp")) {
2766 dual_timestamp_deserialize(v
, &u
->active_enter_timestamp
);
2768 } else if (streq(l
, "active-exit-timestamp")) {
2769 dual_timestamp_deserialize(v
, &u
->active_exit_timestamp
);
2771 } else if (streq(l
, "inactive-enter-timestamp")) {
2772 dual_timestamp_deserialize(v
, &u
->inactive_enter_timestamp
);
2774 } else if (streq(l
, "condition-timestamp")) {
2775 dual_timestamp_deserialize(v
, &u
->condition_timestamp
);
2777 } else if (streq(l
, "assert-timestamp")) {
2778 dual_timestamp_deserialize(v
, &u
->assert_timestamp
);
2780 } else if (streq(l
, "condition-result")) {
2782 r
= parse_boolean(v
);
2784 log_unit_debug(u
, "Failed to parse condition result value %s, ignoring.", v
);
2786 u
->condition_result
= r
;
2790 } else if (streq(l
, "assert-result")) {
2792 r
= parse_boolean(v
);
2794 log_unit_debug(u
, "Failed to parse assert result value %s, ignoring.", v
);
2796 u
->assert_result
= r
;
2800 } else if (streq(l
, "transient")) {
2802 r
= parse_boolean(v
);
2804 log_unit_debug(u
, "Failed to parse transient bool %s, ignoring.", v
);
2810 } else if (streq(l
, "cpuacct-usage-base")) {
2812 r
= safe_atou64(v
, &u
->cpuacct_usage_base
);
2814 log_unit_debug(u
, "Failed to parse CPU usage %s, ignoring.", v
);
2818 } else if (streq(l
, "cgroup")) {
2820 r
= unit_set_cgroup_path(u
, v
);
2822 log_unit_debug_errno(u
, r
, "Failed to set cgroup path %s, ignoring: %m", v
);
2824 (void) unit_watch_cgroup(u
);
2827 } else if (streq(l
, "cgroup-realized")) {
2830 b
= parse_boolean(v
);
2832 log_unit_debug(u
, "Failed to parse cgroup-realized bool %s, ignoring.", v
);
2834 u
->cgroup_realized
= b
;
2839 if (unit_can_serialize(u
)) {
2841 r
= exec_runtime_deserialize_item(u
, rt
, l
, v
, fds
);
2843 log_unit_warning(u
, "Failed to deserialize runtime parameter '%s', ignoring.", l
);
2847 /* Returns positive if key was handled by the call */
2852 r
= UNIT_VTABLE(u
)->deserialize_item(u
, l
, v
, fds
);
2854 log_unit_warning(u
, "Failed to deserialize unit parameter '%s', ignoring.", l
);
2858 /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is
2859 * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from
2860 * before 228 where the base for timeouts was not persistent across reboots. */
2862 if (!dual_timestamp_is_set(&u
->state_change_timestamp
))
2863 dual_timestamp_get(&u
->state_change_timestamp
);
2868 int unit_add_node_link(Unit
*u
, const char *what
, bool wants
, UnitDependency dep
) {
2870 _cleanup_free_
char *e
= NULL
;
2875 /* Adds in links to the device node that this unit is based on */
2879 if (!is_device_path(what
))
2882 /* When device units aren't supported (such as in a
2883 * container), don't create dependencies on them. */
2884 if (!unit_type_supported(UNIT_DEVICE
))
2887 r
= unit_name_from_path(what
, ".device", &e
);
2891 r
= manager_load_unit(u
->manager
, e
, NULL
, NULL
, &device
);
2895 r
= unit_add_two_dependencies(u
, UNIT_AFTER
,
2896 MANAGER_IS_SYSTEM(u
->manager
) ? dep
: UNIT_WANTS
,
2902 r
= unit_add_dependency(device
, UNIT_WANTS
, u
, false);
2910 int unit_coldplug(Unit
*u
) {
2915 /* Make sure we don't enter a loop, when coldplugging
2920 u
->coldplugged
= true;
2922 if (UNIT_VTABLE(u
)->coldplug
)
2923 r
= UNIT_VTABLE(u
)->coldplug(u
);
2926 q
= job_coldplug(u
->job
);
2936 static bool fragment_mtime_changed(const char *path
, usec_t mtime
) {
2942 if (stat(path
, &st
) < 0)
2943 /* What, cannot access this anymore? */
2947 /* For non-empty files check the mtime */
2948 return timespec_load(&st
.st_mtim
) != mtime
;
2949 else if (!null_or_empty(&st
))
2950 /* For masked files check if they are still so */
2956 bool unit_need_daemon_reload(Unit
*u
) {
2957 _cleanup_strv_free_
char **t
= NULL
;
2959 unsigned loaded_cnt
, current_cnt
;
2963 if (fragment_mtime_changed(u
->fragment_path
, u
->fragment_mtime
) ||
2964 fragment_mtime_changed(u
->source_path
, u
->source_mtime
))
2967 (void) unit_find_dropin_paths(u
, &t
);
2968 loaded_cnt
= strv_length(t
);
2969 current_cnt
= strv_length(u
->dropin_paths
);
2971 if (loaded_cnt
== current_cnt
) {
2972 if (loaded_cnt
== 0)
2975 if (strv_overlap(u
->dropin_paths
, t
)) {
2976 STRV_FOREACH(path
, u
->dropin_paths
)
2977 if (fragment_mtime_changed(*path
, u
->dropin_mtime
))
2987 void unit_reset_failed(Unit
*u
) {
2990 if (UNIT_VTABLE(u
)->reset_failed
)
2991 UNIT_VTABLE(u
)->reset_failed(u
);
2993 RATELIMIT_RESET(u
->start_limit
);
2994 u
->start_limit_hit
= false;
2997 Unit
*unit_following(Unit
*u
) {
3000 if (UNIT_VTABLE(u
)->following
)
3001 return UNIT_VTABLE(u
)->following(u
);
3006 bool unit_stop_pending(Unit
*u
) {
3009 /* This call does check the current state of the unit. It's
3010 * hence useful to be called from state change calls of the
3011 * unit itself, where the state isn't updated yet. This is
3012 * different from unit_inactive_or_pending() which checks both
3013 * the current state and for a queued job. */
3015 return u
->job
&& u
->job
->type
== JOB_STOP
;
3018 bool unit_inactive_or_pending(Unit
*u
) {
3021 /* Returns true if the unit is inactive or going down */
3023 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)))
3026 if (unit_stop_pending(u
))
3032 bool unit_active_or_pending(Unit
*u
) {
3035 /* Returns true if the unit is active or going up */
3037 if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
3041 (u
->job
->type
== JOB_START
||
3042 u
->job
->type
== JOB_RELOAD_OR_START
||
3043 u
->job
->type
== JOB_RESTART
))
3049 int unit_kill(Unit
*u
, KillWho w
, int signo
, sd_bus_error
*error
) {
3051 assert(w
>= 0 && w
< _KILL_WHO_MAX
);
3053 assert(signo
< _NSIG
);
3055 if (!UNIT_VTABLE(u
)->kill
)
3058 return UNIT_VTABLE(u
)->kill(u
, w
, signo
, error
);
3061 static Set
*unit_pid_set(pid_t main_pid
, pid_t control_pid
) {
3065 pid_set
= set_new(NULL
);
3069 /* Exclude the main/control pids from being killed via the cgroup */
3071 r
= set_put(pid_set
, PID_TO_PTR(main_pid
));
3076 if (control_pid
> 0) {
3077 r
= set_put(pid_set
, PID_TO_PTR(control_pid
));
3089 int unit_kill_common(
3095 sd_bus_error
*error
) {
3098 bool killed
= false;
3100 if (IN_SET(who
, KILL_MAIN
, KILL_MAIN_FAIL
)) {
3102 return sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no main processes", unit_type_to_string(u
->type
));
3103 else if (main_pid
== 0)
3104 return sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No main process to kill");
3107 if (IN_SET(who
, KILL_CONTROL
, KILL_CONTROL_FAIL
)) {
3108 if (control_pid
< 0)
3109 return sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no control processes", unit_type_to_string(u
->type
));
3110 else if (control_pid
== 0)
3111 return sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No control process to kill");
3114 if (IN_SET(who
, KILL_CONTROL
, KILL_CONTROL_FAIL
, KILL_ALL
, KILL_ALL_FAIL
))
3115 if (control_pid
> 0) {
3116 if (kill(control_pid
, signo
) < 0)
3122 if (IN_SET(who
, KILL_MAIN
, KILL_MAIN_FAIL
, KILL_ALL
, KILL_ALL_FAIL
))
3124 if (kill(main_pid
, signo
) < 0)
3130 if (IN_SET(who
, KILL_ALL
, KILL_ALL_FAIL
) && u
->cgroup_path
) {
3131 _cleanup_set_free_ Set
*pid_set
= NULL
;
3134 /* Exclude the main/control pids from being killed via the cgroup */
3135 pid_set
= unit_pid_set(main_pid
, control_pid
);
3139 q
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, signo
, false, false, false, pid_set
);
3140 if (q
< 0 && q
!= -EAGAIN
&& q
!= -ESRCH
&& q
!= -ENOENT
)
3146 if (r
== 0 && !killed
&& IN_SET(who
, KILL_ALL_FAIL
, KILL_CONTROL_FAIL
))
3152 int unit_following_set(Unit
*u
, Set
**s
) {
3156 if (UNIT_VTABLE(u
)->following_set
)
3157 return UNIT_VTABLE(u
)->following_set(u
, s
);
3163 UnitFileState
unit_get_unit_file_state(Unit
*u
) {
3168 if (u
->unit_file_state
< 0 && u
->fragment_path
) {
3169 r
= unit_file_get_state(
3170 u
->manager
->unit_file_scope
,
3172 basename(u
->fragment_path
),
3173 &u
->unit_file_state
);
3175 u
->unit_file_state
= UNIT_FILE_BAD
;
3178 return u
->unit_file_state
;
3181 int unit_get_unit_file_preset(Unit
*u
) {
3184 if (u
->unit_file_preset
< 0 && u
->fragment_path
)
3185 u
->unit_file_preset
= unit_file_query_preset(
3186 u
->manager
->unit_file_scope
,
3188 basename(u
->fragment_path
));
3190 return u
->unit_file_preset
;
3193 Unit
* unit_ref_set(UnitRef
*ref
, Unit
*u
) {
3198 unit_ref_unset(ref
);
3201 LIST_PREPEND(refs
, u
->refs
, ref
);
3205 void unit_ref_unset(UnitRef
*ref
) {
3211 LIST_REMOVE(refs
, ref
->unit
->refs
, ref
);
3215 int unit_patch_contexts(Unit
*u
) {
3223 /* Patch in the manager defaults into the exec and cgroup
3224 * contexts, _after_ the rest of the settings have been
3227 ec
= unit_get_exec_context(u
);
3229 /* This only copies in the ones that need memory */
3230 for (i
= 0; i
< _RLIMIT_MAX
; i
++)
3231 if (u
->manager
->rlimit
[i
] && !ec
->rlimit
[i
]) {
3232 ec
->rlimit
[i
] = newdup(struct rlimit
, u
->manager
->rlimit
[i
], 1);
3237 if (MANAGER_IS_USER(u
->manager
) &&
3238 !ec
->working_directory
) {
3240 r
= get_home_dir(&ec
->working_directory
);
3244 /* Allow user services to run, even if the
3245 * home directory is missing */
3246 ec
->working_directory_missing_ok
= true;
3249 if (MANAGER_IS_USER(u
->manager
) &&
3250 (ec
->syscall_whitelist
||
3251 !set_isempty(ec
->syscall_filter
) ||
3252 !set_isempty(ec
->syscall_archs
) ||
3253 ec
->address_families_whitelist
||
3254 !set_isempty(ec
->address_families
)))
3255 ec
->no_new_privileges
= true;
3257 if (ec
->private_devices
)
3258 ec
->capability_bounding_set
&= ~(UINT64_C(1) << CAP_MKNOD
);
3261 cc
= unit_get_cgroup_context(u
);
3265 ec
->private_devices
&&
3266 cc
->device_policy
== CGROUP_AUTO
)
3267 cc
->device_policy
= CGROUP_CLOSED
;
3273 ExecContext
*unit_get_exec_context(Unit
*u
) {
3280 offset
= UNIT_VTABLE(u
)->exec_context_offset
;
3284 return (ExecContext
*) ((uint8_t*) u
+ offset
);
3287 KillContext
*unit_get_kill_context(Unit
*u
) {
3294 offset
= UNIT_VTABLE(u
)->kill_context_offset
;
3298 return (KillContext
*) ((uint8_t*) u
+ offset
);
3301 CGroupContext
*unit_get_cgroup_context(Unit
*u
) {
3307 offset
= UNIT_VTABLE(u
)->cgroup_context_offset
;
3311 return (CGroupContext
*) ((uint8_t*) u
+ offset
);
3314 ExecRuntime
*unit_get_exec_runtime(Unit
*u
) {
3320 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
3324 return *(ExecRuntime
**) ((uint8_t*) u
+ offset
);
3327 static const char* unit_drop_in_dir(Unit
*u
, UnitSetPropertiesMode mode
) {
3330 if (u
->transient
) /* Redirect drop-ins for transient units always into the transient directory. */
3331 return u
->manager
->lookup_paths
.transient
;
3333 if (mode
== UNIT_RUNTIME
)
3334 return u
->manager
->lookup_paths
.runtime_config
;
3336 if (mode
== UNIT_PERSISTENT
)
3337 return u
->manager
->lookup_paths
.persistent_config
;
3342 int unit_write_drop_in(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *data
) {
3343 _cleanup_free_
char *p
= NULL
, *q
= NULL
;
3349 if (!IN_SET(mode
, UNIT_PERSISTENT
, UNIT_RUNTIME
))
3352 dir
= unit_drop_in_dir(u
, mode
);
3356 r
= write_drop_in(dir
, u
->id
, 50, name
, data
);
3360 r
= drop_in_file(dir
, u
->id
, 50, name
, &p
, &q
);
3364 r
= strv_extend(&u
->dropin_paths
, q
);
3368 strv_uniq(u
->dropin_paths
);
3370 u
->dropin_mtime
= now(CLOCK_REALTIME
);
3375 int unit_write_drop_in_format(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *format
, ...) {
3376 _cleanup_free_
char *p
= NULL
;
3384 if (!IN_SET(mode
, UNIT_PERSISTENT
, UNIT_RUNTIME
))
3387 va_start(ap
, format
);
3388 r
= vasprintf(&p
, format
, ap
);
3394 return unit_write_drop_in(u
, mode
, name
, p
);
3397 int unit_write_drop_in_private(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *data
) {
3404 if (!UNIT_VTABLE(u
)->private_section
)
3407 if (!IN_SET(mode
, UNIT_PERSISTENT
, UNIT_RUNTIME
))
3410 ndata
= strjoina("[", UNIT_VTABLE(u
)->private_section
, "]\n", data
, NULL
);
3412 return unit_write_drop_in(u
, mode
, name
, ndata
);
3415 int unit_write_drop_in_private_format(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *format
, ...) {
3416 _cleanup_free_
char *p
= NULL
;
3424 if (!IN_SET(mode
, UNIT_PERSISTENT
, UNIT_RUNTIME
))
3427 va_start(ap
, format
);
3428 r
= vasprintf(&p
, format
, ap
);
3434 return unit_write_drop_in_private(u
, mode
, name
, p
);
3437 int unit_make_transient(Unit
*u
) {
3440 if (!UNIT_VTABLE(u
)->can_transient
)
3443 u
->load_state
= UNIT_STUB
;
3445 u
->transient
= true;
3447 u
->fragment_path
= mfree(u
->fragment_path
);
3448 u
->source_path
= mfree(u
->source_path
);
3449 u
->dropin_paths
= strv_free(u
->dropin_paths
);
3450 u
->fragment_mtime
= u
->source_mtime
= u
->dropin_mtime
= 0;
3452 unit_add_to_dbus_queue(u
);
3453 unit_add_to_gc_queue(u
);
3454 unit_add_to_load_queue(u
);
3459 int unit_kill_context(
3465 bool main_pid_alien
) {
3467 bool wait_for_exit
= false;
3473 if (c
->kill_mode
== KILL_NONE
)
3483 case KILL_TERMINATE
:
3484 sig
= c
->kill_signal
;
3487 assert_not_reached("KillOperation unknown");
3491 r
= kill_and_sigcont(main_pid
, sig
);
3493 if (r
< 0 && r
!= -ESRCH
) {
3494 _cleanup_free_
char *comm
= NULL
;
3495 get_process_comm(main_pid
, &comm
);
3497 log_unit_warning_errno(u
, r
, "Failed to kill main process " PID_FMT
" (%s), ignoring: %m", main_pid
, strna(comm
));
3499 if (!main_pid_alien
)
3500 wait_for_exit
= true;
3502 if (c
->send_sighup
&& k
== KILL_TERMINATE
)
3503 (void) kill(main_pid
, SIGHUP
);
3507 if (control_pid
> 0) {
3508 r
= kill_and_sigcont(control_pid
, sig
);
3510 if (r
< 0 && r
!= -ESRCH
) {
3511 _cleanup_free_
char *comm
= NULL
;
3512 get_process_comm(control_pid
, &comm
);
3514 log_unit_warning_errno(u
, r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m", control_pid
, strna(comm
));
3516 wait_for_exit
= true;
3518 if (c
->send_sighup
&& k
== KILL_TERMINATE
)
3519 (void) kill(control_pid
, SIGHUP
);
3523 if (u
->cgroup_path
&&
3524 (c
->kill_mode
== KILL_CONTROL_GROUP
|| (c
->kill_mode
== KILL_MIXED
&& k
== KILL_KILL
))) {
3525 _cleanup_set_free_ Set
*pid_set
= NULL
;
3527 /* Exclude the main/control pids from being killed via the cgroup */
3528 pid_set
= unit_pid_set(main_pid
, control_pid
);
3532 r
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, sig
, true, k
!= KILL_TERMINATE
, false, pid_set
);
3534 if (r
!= -EAGAIN
&& r
!= -ESRCH
&& r
!= -ENOENT
)
3535 log_unit_warning_errno(u
, r
, "Failed to kill control group %s, ignoring: %m", u
->cgroup_path
);
3539 /* FIXME: For now, on the legacy hierarchy, we
3540 * will not wait for the cgroup members to die
3541 * if we are running in a container or if this
3542 * is a delegation unit, simply because cgroup
3543 * notification is unreliable in these
3544 * cases. It doesn't work at all in
3545 * containers, and outside of containers it
3546 * can be confused easily by left-over
3547 * directories in the cgroup -- which however
3548 * should not exist in non-delegated units. On
3549 * the unified hierarchy that's different,
3550 * there we get proper events. Hence rely on
3553 if (cg_unified() > 0 ||
3554 (detect_container() == 0 && !unit_cgroup_delegate(u
)))
3555 wait_for_exit
= true;
3557 if (c
->send_sighup
&& k
!= KILL_KILL
) {
3560 pid_set
= unit_pid_set(main_pid
, control_pid
);
3564 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, SIGHUP
, false, true, false, pid_set
);
3569 return wait_for_exit
;
3572 int unit_require_mounts_for(Unit
*u
, const char *path
) {
3573 char prefix
[strlen(path
) + 1], *p
;
3579 /* Registers a unit for requiring a certain path and all its
3580 * prefixes. We keep a simple array of these paths in the
3581 * unit, since its usually short. However, we build a prefix
3582 * table for all possible prefixes so that new appearing mount
3583 * units can easily determine which units to make themselves a
3586 if (!path_is_absolute(path
))
3593 path_kill_slashes(p
);
3595 if (!path_is_safe(p
)) {
3600 if (strv_contains(u
->requires_mounts_for
, p
)) {
3605 r
= strv_consume(&u
->requires_mounts_for
, p
);
3609 PATH_FOREACH_PREFIX_MORE(prefix
, p
) {
3612 x
= hashmap_get(u
->manager
->units_requiring_mounts_for
, prefix
);
3616 r
= hashmap_ensure_allocated(&u
->manager
->units_requiring_mounts_for
, &string_hash_ops
);
3630 r
= hashmap_put(u
->manager
->units_requiring_mounts_for
, q
, x
);
3646 int unit_setup_exec_runtime(Unit
*u
) {
3652 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
3655 /* Check if there already is an ExecRuntime for this unit? */
3656 rt
= (ExecRuntime
**) ((uint8_t*) u
+ offset
);
3660 /* Try to get it from somebody else */
3661 SET_FOREACH(other
, u
->dependencies
[UNIT_JOINS_NAMESPACE_OF
], i
) {
3663 *rt
= unit_get_exec_runtime(other
);
3665 exec_runtime_ref(*rt
);
3670 return exec_runtime_make(rt
, unit_get_exec_context(u
), u
->id
);
3673 bool unit_type_supported(UnitType t
) {
3674 if (_unlikely_(t
< 0))
3676 if (_unlikely_(t
>= _UNIT_TYPE_MAX
))
3679 if (!unit_vtable
[t
]->supported
)
3682 return unit_vtable
[t
]->supported();
3685 void unit_warn_if_dir_nonempty(Unit
*u
, const char* where
) {
3691 r
= dir_is_empty(where
);
3695 log_unit_warning_errno(u
, r
, "Failed to check directory %s: %m", where
);
3699 log_struct(LOG_NOTICE
,
3700 LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING
),
3702 LOG_UNIT_MESSAGE(u
, "Directory %s to mount over is not empty, mounting anyway.", where
),
3707 int unit_fail_if_symlink(Unit
*u
, const char* where
) {
3713 r
= is_symlink(where
);
3715 log_unit_debug_errno(u
, r
, "Failed to check symlink %s, ignoring: %m", where
);
3722 LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING
),
3724 LOG_UNIT_MESSAGE(u
, "Mount on symlink %s not allowed.", where
),
3731 bool unit_is_pristine(Unit
*u
) {
3734 /* Check if the unit already exists or is already around,
3735 * in a number of different ways. Note that to cater for unit
3736 * types such as slice, we are generally fine with units that
3737 * are marked UNIT_LOADED even even though nothing was
3738 * actually loaded, as those unit types don't require a file
3739 * on disk to validly load. */
3741 return !(!IN_SET(u
->load_state
, UNIT_NOT_FOUND
, UNIT_LOADED
) ||
3744 !strv_isempty(u
->dropin_paths
) ||