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
;
425 p
= dirname_malloc(*i
);
431 static void unit_free_requires_mounts_for(Unit
*u
) {
434 STRV_FOREACH(j
, u
->requires_mounts_for
) {
435 char s
[strlen(*j
) + 1];
437 PATH_FOREACH_PREFIX_MORE(s
, *j
) {
441 x
= hashmap_get2(u
->manager
->units_requiring_mounts_for
, s
, (void**) &y
);
447 if (set_isempty(x
)) {
448 hashmap_remove(u
->manager
->units_requiring_mounts_for
, y
);
455 u
->requires_mounts_for
= strv_free(u
->requires_mounts_for
);
458 static void unit_done(Unit
*u
) {
467 if (UNIT_VTABLE(u
)->done
)
468 UNIT_VTABLE(u
)->done(u
);
470 ec
= unit_get_exec_context(u
);
472 exec_context_done(ec
);
474 cc
= unit_get_cgroup_context(u
);
476 cgroup_context_done(cc
);
479 void unit_free(Unit
*u
) {
486 if (u
->manager
->n_reloading
<= 0)
487 unit_remove_transient(u
);
489 bus_unit_send_removed_signal(u
);
493 sd_bus_slot_unref(u
->match_bus_slot
);
495 unit_free_requires_mounts_for(u
);
497 SET_FOREACH(t
, u
->names
, i
)
498 hashmap_remove_value(u
->manager
->units
, t
, u
);
512 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
513 bidi_set_free(u
, u
->dependencies
[d
]);
515 if (u
->type
!= _UNIT_TYPE_INVALID
)
516 LIST_REMOVE(units_by_type
, u
->manager
->units_by_type
[u
->type
], u
);
518 if (u
->in_load_queue
)
519 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
521 if (u
->in_dbus_queue
)
522 LIST_REMOVE(dbus_queue
, u
->manager
->dbus_unit_queue
, u
);
524 if (u
->in_cleanup_queue
)
525 LIST_REMOVE(cleanup_queue
, u
->manager
->cleanup_queue
, u
);
527 if (u
->in_gc_queue
) {
528 LIST_REMOVE(gc_queue
, u
->manager
->gc_queue
, u
);
529 u
->manager
->n_in_gc_queue
--;
532 if (u
->in_cgroup_queue
)
533 LIST_REMOVE(cgroup_queue
, u
->manager
->cgroup_queue
, u
);
535 unit_release_cgroup(u
);
537 (void) manager_update_failed_units(u
->manager
, u
, false);
538 set_remove(u
->manager
->startup_units
, u
);
540 free(u
->description
);
541 strv_free(u
->documentation
);
542 free(u
->fragment_path
);
543 free(u
->source_path
);
544 strv_free(u
->dropin_paths
);
547 free(u
->job_timeout_reboot_arg
);
549 set_free_free(u
->names
);
551 unit_unwatch_all_pids(u
);
553 condition_free_list(u
->conditions
);
554 condition_free_list(u
->asserts
);
558 unit_ref_unset(&u
->slice
);
561 unit_ref_unset(u
->refs
);
566 UnitActiveState
unit_active_state(Unit
*u
) {
569 if (u
->load_state
== UNIT_MERGED
)
570 return unit_active_state(unit_follow_merge(u
));
572 /* After a reload it might happen that a unit is not correctly
573 * loaded but still has a process around. That's why we won't
574 * shortcut failed loading to UNIT_INACTIVE_FAILED. */
576 return UNIT_VTABLE(u
)->active_state(u
);
579 const char* unit_sub_state_to_string(Unit
*u
) {
582 return UNIT_VTABLE(u
)->sub_state_to_string(u
);
585 static int complete_move(Set
**s
, Set
**other
) {
595 r
= set_move(*s
, *other
);
606 static int merge_names(Unit
*u
, Unit
*other
) {
614 r
= complete_move(&u
->names
, &other
->names
);
618 set_free_free(other
->names
);
622 SET_FOREACH(t
, u
->names
, i
)
623 assert_se(hashmap_replace(u
->manager
->units
, t
, u
) == 0);
628 static int reserve_dependencies(Unit
*u
, Unit
*other
, UnitDependency d
) {
633 assert(d
< _UNIT_DEPENDENCY_MAX
);
636 * If u does not have this dependency set allocated, there is no need
637 * to reserve anything. In that case other's set will be transferred
638 * as a whole to u by complete_move().
640 if (!u
->dependencies
[d
])
643 /* merge_dependencies() will skip a u-on-u dependency */
644 n_reserve
= set_size(other
->dependencies
[d
]) - !!set_get(other
->dependencies
[d
], u
);
646 return set_reserve(u
->dependencies
[d
], n_reserve
);
649 static void merge_dependencies(Unit
*u
, Unit
*other
, const char *other_id
, UnitDependency d
) {
656 assert(d
< _UNIT_DEPENDENCY_MAX
);
658 /* Fix backwards pointers */
659 SET_FOREACH(back
, other
->dependencies
[d
], i
) {
662 for (k
= 0; k
< _UNIT_DEPENDENCY_MAX
; k
++) {
663 /* Do not add dependencies between u and itself */
665 if (set_remove(back
->dependencies
[k
], other
))
666 maybe_warn_about_dependency(u
, other_id
, k
);
668 r
= set_remove_and_put(back
->dependencies
[k
], other
, u
);
670 set_remove(back
->dependencies
[k
], other
);
672 assert(r
>= 0 || r
== -ENOENT
);
677 /* Also do not move dependencies on u to itself */
678 back
= set_remove(other
->dependencies
[d
], u
);
680 maybe_warn_about_dependency(u
, other_id
, d
);
682 /* The move cannot fail. The caller must have performed a reservation. */
683 assert_se(complete_move(&u
->dependencies
[d
], &other
->dependencies
[d
]) == 0);
685 other
->dependencies
[d
] = set_free(other
->dependencies
[d
]);
688 int unit_merge(Unit
*u
, Unit
*other
) {
690 const char *other_id
= NULL
;
695 assert(u
->manager
== other
->manager
);
696 assert(u
->type
!= _UNIT_TYPE_INVALID
);
698 other
= unit_follow_merge(other
);
703 if (u
->type
!= other
->type
)
706 if (!u
->instance
!= !other
->instance
)
709 if (other
->load_state
!= UNIT_STUB
&&
710 other
->load_state
!= UNIT_NOT_FOUND
)
719 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
723 other_id
= strdupa(other
->id
);
725 /* Make reservations to ensure merge_dependencies() won't fail */
726 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
727 r
= reserve_dependencies(u
, other
, d
);
729 * We don't rollback reservations if we fail. We don't have
730 * a way to undo reservations. A reservation is not a leak.
737 r
= merge_names(u
, other
);
741 /* Redirect all references */
743 unit_ref_set(other
->refs
, u
);
745 /* Merge dependencies */
746 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
747 merge_dependencies(u
, other
, other_id
, d
);
749 other
->load_state
= UNIT_MERGED
;
750 other
->merged_into
= u
;
752 /* If there is still some data attached to the other node, we
753 * don't need it anymore, and can free it. */
754 if (other
->load_state
!= UNIT_STUB
)
755 if (UNIT_VTABLE(other
)->done
)
756 UNIT_VTABLE(other
)->done(other
);
758 unit_add_to_dbus_queue(u
);
759 unit_add_to_cleanup_queue(other
);
764 int unit_merge_by_name(Unit
*u
, const char *name
) {
767 _cleanup_free_
char *s
= NULL
;
772 if (unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
776 r
= unit_name_replace_instance(name
, u
->instance
, &s
);
783 other
= manager_get_unit(u
->manager
, name
);
785 return unit_merge(u
, other
);
787 return unit_add_name(u
, name
);
790 Unit
* unit_follow_merge(Unit
*u
) {
793 while (u
->load_state
== UNIT_MERGED
)
794 assert_se(u
= u
->merged_into
);
799 int unit_add_exec_dependencies(Unit
*u
, ExecContext
*c
) {
805 if (c
->working_directory
) {
806 r
= unit_require_mounts_for(u
, c
->working_directory
);
811 if (c
->root_directory
) {
812 r
= unit_require_mounts_for(u
, c
->root_directory
);
817 if (u
->manager
->running_as
!= MANAGER_SYSTEM
)
820 if (c
->private_tmp
) {
821 r
= unit_require_mounts_for(u
, "/tmp");
825 r
= unit_require_mounts_for(u
, "/var/tmp");
830 if (c
->std_output
!= EXEC_OUTPUT_KMSG
&&
831 c
->std_output
!= EXEC_OUTPUT_SYSLOG
&&
832 c
->std_output
!= EXEC_OUTPUT_JOURNAL
&&
833 c
->std_output
!= EXEC_OUTPUT_KMSG_AND_CONSOLE
&&
834 c
->std_output
!= EXEC_OUTPUT_SYSLOG_AND_CONSOLE
&&
835 c
->std_output
!= EXEC_OUTPUT_JOURNAL_AND_CONSOLE
&&
836 c
->std_error
!= EXEC_OUTPUT_KMSG
&&
837 c
->std_error
!= EXEC_OUTPUT_SYSLOG
&&
838 c
->std_error
!= EXEC_OUTPUT_JOURNAL
&&
839 c
->std_error
!= EXEC_OUTPUT_KMSG_AND_CONSOLE
&&
840 c
->std_error
!= EXEC_OUTPUT_JOURNAL_AND_CONSOLE
&&
841 c
->std_error
!= EXEC_OUTPUT_SYSLOG_AND_CONSOLE
)
844 /* If syslog or kernel logging is requested, make sure our own
845 * logging daemon is run first. */
847 r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_JOURNALD_SOCKET
, NULL
, true);
854 const char *unit_description(Unit
*u
) {
858 return u
->description
;
863 void unit_dump(Unit
*u
, FILE *f
, const char *prefix
) {
869 timestamp0
[FORMAT_TIMESTAMP_MAX
],
870 timestamp1
[FORMAT_TIMESTAMP_MAX
],
871 timestamp2
[FORMAT_TIMESTAMP_MAX
],
872 timestamp3
[FORMAT_TIMESTAMP_MAX
],
873 timestamp4
[FORMAT_TIMESTAMP_MAX
],
874 timespan
[FORMAT_TIMESPAN_MAX
];
876 _cleanup_set_free_ Set
*following_set
= NULL
;
880 assert(u
->type
>= 0);
882 prefix
= strempty(prefix
);
883 prefix2
= strjoina(prefix
, "\t");
887 "%s\tDescription: %s\n"
889 "%s\tUnit Load State: %s\n"
890 "%s\tUnit Active State: %s\n"
891 "%s\tState Change Timestamp: %s\n"
892 "%s\tInactive Exit Timestamp: %s\n"
893 "%s\tActive Enter Timestamp: %s\n"
894 "%s\tActive Exit Timestamp: %s\n"
895 "%s\tInactive Enter Timestamp: %s\n"
896 "%s\tGC Check Good: %s\n"
897 "%s\tNeed Daemon Reload: %s\n"
898 "%s\tTransient: %s\n"
901 "%s\tCGroup realized: %s\n"
902 "%s\tCGroup mask: 0x%x\n"
903 "%s\tCGroup members mask: 0x%x\n",
905 prefix
, unit_description(u
),
906 prefix
, strna(u
->instance
),
907 prefix
, unit_load_state_to_string(u
->load_state
),
908 prefix
, unit_active_state_to_string(unit_active_state(u
)),
909 prefix
, strna(format_timestamp(timestamp0
, sizeof(timestamp0
), u
->state_change_timestamp
.realtime
)),
910 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->inactive_exit_timestamp
.realtime
)),
911 prefix
, strna(format_timestamp(timestamp2
, sizeof(timestamp2
), u
->active_enter_timestamp
.realtime
)),
912 prefix
, strna(format_timestamp(timestamp3
, sizeof(timestamp3
), u
->active_exit_timestamp
.realtime
)),
913 prefix
, strna(format_timestamp(timestamp4
, sizeof(timestamp4
), u
->inactive_enter_timestamp
.realtime
)),
914 prefix
, yes_no(unit_check_gc(u
)),
915 prefix
, yes_no(unit_need_daemon_reload(u
)),
916 prefix
, yes_no(u
->transient
),
917 prefix
, strna(unit_slice_name(u
)),
918 prefix
, strna(u
->cgroup_path
),
919 prefix
, yes_no(u
->cgroup_realized
),
920 prefix
, u
->cgroup_realized_mask
,
921 prefix
, u
->cgroup_members_mask
);
923 SET_FOREACH(t
, u
->names
, i
)
924 fprintf(f
, "%s\tName: %s\n", prefix
, t
);
926 STRV_FOREACH(j
, u
->documentation
)
927 fprintf(f
, "%s\tDocumentation: %s\n", prefix
, *j
);
929 following
= unit_following(u
);
931 fprintf(f
, "%s\tFollowing: %s\n", prefix
, following
->id
);
933 r
= unit_following_set(u
, &following_set
);
937 SET_FOREACH(other
, following_set
, i
)
938 fprintf(f
, "%s\tFollowing Set Member: %s\n", prefix
, other
->id
);
941 if (u
->fragment_path
)
942 fprintf(f
, "%s\tFragment Path: %s\n", prefix
, u
->fragment_path
);
945 fprintf(f
, "%s\tSource Path: %s\n", prefix
, u
->source_path
);
947 STRV_FOREACH(j
, u
->dropin_paths
)
948 fprintf(f
, "%s\tDropIn Path: %s\n", prefix
, *j
);
950 if (u
->job_timeout
!= USEC_INFINITY
)
951 fprintf(f
, "%s\tJob Timeout: %s\n", prefix
, format_timespan(timespan
, sizeof(timespan
), u
->job_timeout
, 0));
953 if (u
->job_timeout_action
!= FAILURE_ACTION_NONE
)
954 fprintf(f
, "%s\tJob Timeout Action: %s\n", prefix
, failure_action_to_string(u
->job_timeout_action
));
956 if (u
->job_timeout_reboot_arg
)
957 fprintf(f
, "%s\tJob Timeout Reboot Argument: %s\n", prefix
, u
->job_timeout_reboot_arg
);
959 condition_dump_list(u
->conditions
, f
, prefix
, condition_type_to_string
);
960 condition_dump_list(u
->asserts
, f
, prefix
, assert_type_to_string
);
962 if (dual_timestamp_is_set(&u
->condition_timestamp
))
964 "%s\tCondition Timestamp: %s\n"
965 "%s\tCondition Result: %s\n",
966 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->condition_timestamp
.realtime
)),
967 prefix
, yes_no(u
->condition_result
));
969 if (dual_timestamp_is_set(&u
->assert_timestamp
))
971 "%s\tAssert Timestamp: %s\n"
972 "%s\tAssert Result: %s\n",
973 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->assert_timestamp
.realtime
)),
974 prefix
, yes_no(u
->assert_result
));
976 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
979 SET_FOREACH(other
, u
->dependencies
[d
], i
)
980 fprintf(f
, "%s\t%s: %s\n", prefix
, unit_dependency_to_string(d
), other
->id
);
983 if (!strv_isempty(u
->requires_mounts_for
)) {
985 "%s\tRequiresMountsFor:", prefix
);
987 STRV_FOREACH(j
, u
->requires_mounts_for
)
988 fprintf(f
, " %s", *j
);
993 if (u
->load_state
== UNIT_LOADED
) {
996 "%s\tStopWhenUnneeded: %s\n"
997 "%s\tRefuseManualStart: %s\n"
998 "%s\tRefuseManualStop: %s\n"
999 "%s\tDefaultDependencies: %s\n"
1000 "%s\tOnFailureJobMode: %s\n"
1001 "%s\tIgnoreOnIsolate: %s\n",
1002 prefix
, yes_no(u
->stop_when_unneeded
),
1003 prefix
, yes_no(u
->refuse_manual_start
),
1004 prefix
, yes_no(u
->refuse_manual_stop
),
1005 prefix
, yes_no(u
->default_dependencies
),
1006 prefix
, job_mode_to_string(u
->on_failure_job_mode
),
1007 prefix
, yes_no(u
->ignore_on_isolate
));
1009 if (UNIT_VTABLE(u
)->dump
)
1010 UNIT_VTABLE(u
)->dump(u
, f
, prefix2
);
1012 } else if (u
->load_state
== UNIT_MERGED
)
1014 "%s\tMerged into: %s\n",
1015 prefix
, u
->merged_into
->id
);
1016 else if (u
->load_state
== UNIT_ERROR
)
1017 fprintf(f
, "%s\tLoad Error Code: %s\n", prefix
, strerror(-u
->load_error
));
1021 job_dump(u
->job
, f
, prefix2
);
1024 job_dump(u
->nop_job
, f
, prefix2
);
1028 /* Common implementation for multiple backends */
1029 int unit_load_fragment_and_dropin(Unit
*u
) {
1034 /* Load a .{service,socket,...} file */
1035 r
= unit_load_fragment(u
);
1039 if (u
->load_state
== UNIT_STUB
)
1042 /* Load drop-in directory data */
1043 r
= unit_load_dropin(unit_follow_merge(u
));
1050 /* Common implementation for multiple backends */
1051 int unit_load_fragment_and_dropin_optional(Unit
*u
) {
1056 /* Same as unit_load_fragment_and_dropin(), but whether
1057 * something can be loaded or not doesn't matter. */
1059 /* Load a .service file */
1060 r
= unit_load_fragment(u
);
1064 if (u
->load_state
== UNIT_STUB
)
1065 u
->load_state
= UNIT_LOADED
;
1067 /* Load drop-in directory data */
1068 r
= unit_load_dropin(unit_follow_merge(u
));
1075 int unit_add_default_target_dependency(Unit
*u
, Unit
*target
) {
1079 if (target
->type
!= UNIT_TARGET
)
1082 /* Only add the dependency if both units are loaded, so that
1083 * that loop check below is reliable */
1084 if (u
->load_state
!= UNIT_LOADED
||
1085 target
->load_state
!= UNIT_LOADED
)
1088 /* If either side wants no automatic dependencies, then let's
1090 if (!u
->default_dependencies
||
1091 !target
->default_dependencies
)
1094 /* Don't create loops */
1095 if (set_get(target
->dependencies
[UNIT_BEFORE
], u
))
1098 return unit_add_dependency(target
, UNIT_AFTER
, u
, true);
1101 static int unit_add_target_dependencies(Unit
*u
) {
1103 static const UnitDependency deps
[] = {
1117 for (k
= 0; k
< ELEMENTSOF(deps
); k
++)
1118 SET_FOREACH(target
, u
->dependencies
[deps
[k
]], i
) {
1119 r
= unit_add_default_target_dependency(u
, target
);
1127 static int unit_add_slice_dependencies(Unit
*u
) {
1130 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
1133 if (UNIT_ISSET(u
->slice
))
1134 return unit_add_two_dependencies(u
, UNIT_AFTER
, UNIT_REQUIRES
, UNIT_DEREF(u
->slice
), true);
1136 if (unit_has_name(u
, SPECIAL_ROOT_SLICE
))
1139 return unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_ROOT_SLICE
, NULL
, true);
1142 static int unit_add_mount_dependencies(Unit
*u
) {
1148 STRV_FOREACH(i
, u
->requires_mounts_for
) {
1149 char prefix
[strlen(*i
) + 1];
1151 PATH_FOREACH_PREFIX_MORE(prefix
, *i
) {
1152 _cleanup_free_
char *p
= NULL
;
1155 r
= unit_name_from_path(prefix
, ".mount", &p
);
1159 m
= manager_get_unit(u
->manager
, p
);
1161 /* Make sure to load the mount unit if
1162 * it exists. If so the dependencies
1163 * on this unit will be added later
1164 * during the loading of the mount
1166 (void) manager_load_unit_prepare(u
->manager
, p
, NULL
, NULL
, &m
);
1172 if (m
->load_state
!= UNIT_LOADED
)
1175 r
= unit_add_dependency(u
, UNIT_AFTER
, m
, true);
1179 if (m
->fragment_path
) {
1180 r
= unit_add_dependency(u
, UNIT_REQUIRES
, m
, true);
1190 static int unit_add_startup_units(Unit
*u
) {
1194 c
= unit_get_cgroup_context(u
);
1198 if (c
->startup_cpu_shares
== CGROUP_CPU_SHARES_INVALID
&&
1199 c
->startup_blockio_weight
== CGROUP_BLKIO_WEIGHT_INVALID
)
1202 r
= set_ensure_allocated(&u
->manager
->startup_units
, NULL
);
1206 return set_put(u
->manager
->startup_units
, u
);
1209 int unit_load(Unit
*u
) {
1214 if (u
->in_load_queue
) {
1215 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
1216 u
->in_load_queue
= false;
1219 if (u
->type
== _UNIT_TYPE_INVALID
)
1222 if (u
->load_state
!= UNIT_STUB
)
1225 if (UNIT_VTABLE(u
)->load
) {
1226 r
= UNIT_VTABLE(u
)->load(u
);
1231 if (u
->load_state
== UNIT_STUB
) {
1236 if (u
->load_state
== UNIT_LOADED
) {
1238 r
= unit_add_target_dependencies(u
);
1242 r
= unit_add_slice_dependencies(u
);
1246 r
= unit_add_mount_dependencies(u
);
1250 r
= unit_add_startup_units(u
);
1254 if (u
->on_failure_job_mode
== JOB_ISOLATE
&& set_size(u
->dependencies
[UNIT_ON_FAILURE
]) > 1) {
1255 log_unit_error(u
, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing.");
1260 unit_update_cgroup_members_masks(u
);
1263 assert((u
->load_state
!= UNIT_MERGED
) == !u
->merged_into
);
1265 unit_add_to_dbus_queue(unit_follow_merge(u
));
1266 unit_add_to_gc_queue(u
);
1271 u
->load_state
= u
->load_state
== UNIT_STUB
? UNIT_NOT_FOUND
: UNIT_ERROR
;
1273 unit_add_to_dbus_queue(u
);
1274 unit_add_to_gc_queue(u
);
1276 log_unit_debug_errno(u
, r
, "Failed to load configuration: %m");
1281 static bool unit_condition_test_list(Unit
*u
, Condition
*first
, const char *(*to_string
)(ConditionType t
)) {
1288 /* If the condition list is empty, then it is true */
1292 /* Otherwise, if all of the non-trigger conditions apply and
1293 * if any of the trigger conditions apply (unless there are
1294 * none) we return true */
1295 LIST_FOREACH(conditions
, c
, first
) {
1298 r
= condition_test(c
);
1301 "Couldn't determine result for %s=%s%s%s, assuming failed: %m",
1303 c
->trigger
? "|" : "",
1304 c
->negate
? "!" : "",
1310 c
->trigger
? "|" : "",
1311 c
->negate
? "!" : "",
1313 condition_result_to_string(c
->result
));
1315 if (!c
->trigger
&& r
<= 0)
1318 if (c
->trigger
&& triggered
<= 0)
1322 return triggered
!= 0;
1325 static bool unit_condition_test(Unit
*u
) {
1328 dual_timestamp_get(&u
->condition_timestamp
);
1329 u
->condition_result
= unit_condition_test_list(u
, u
->conditions
, condition_type_to_string
);
1331 return u
->condition_result
;
1334 static bool unit_assert_test(Unit
*u
) {
1337 dual_timestamp_get(&u
->assert_timestamp
);
1338 u
->assert_result
= unit_condition_test_list(u
, u
->asserts
, assert_type_to_string
);
1340 return u
->assert_result
;
1343 void unit_status_printf(Unit
*u
, const char *status
, const char *unit_status_msg_format
) {
1344 DISABLE_WARNING_FORMAT_NONLITERAL
;
1345 manager_status_printf(u
->manager
, STATUS_TYPE_NORMAL
, status
, unit_status_msg_format
, unit_description(u
));
1349 _pure_
static const char* unit_get_status_message_format(Unit
*u
, JobType t
) {
1351 const UnitStatusMessageFormats
*format_table
;
1354 assert(IN_SET(t
, JOB_START
, JOB_STOP
, JOB_RELOAD
));
1356 if (t
!= JOB_RELOAD
) {
1357 format_table
= &UNIT_VTABLE(u
)->status_message_formats
;
1359 format
= format_table
->starting_stopping
[t
== JOB_STOP
];
1365 /* Return generic strings */
1367 return "Starting %s.";
1368 else if (t
== JOB_STOP
)
1369 return "Stopping %s.";
1371 return "Reloading %s.";
1374 static void unit_status_print_starting_stopping(Unit
*u
, JobType t
) {
1379 /* Reload status messages have traditionally not been printed to console. */
1380 if (!IN_SET(t
, JOB_START
, JOB_STOP
))
1383 format
= unit_get_status_message_format(u
, t
);
1385 DISABLE_WARNING_FORMAT_NONLITERAL
;
1386 unit_status_printf(u
, "", format
);
1390 static void unit_status_log_starting_stopping_reloading(Unit
*u
, JobType t
) {
1397 if (!IN_SET(t
, JOB_START
, JOB_STOP
, JOB_RELOAD
))
1400 if (log_on_console())
1403 /* We log status messages for all units and all operations. */
1405 format
= unit_get_status_message_format(u
, t
);
1407 DISABLE_WARNING_FORMAT_NONLITERAL
;
1408 xsprintf(buf
, format
, unit_description(u
));
1411 mid
= t
== JOB_START
? SD_MESSAGE_UNIT_STARTING
:
1412 t
== JOB_STOP
? SD_MESSAGE_UNIT_STOPPING
:
1413 SD_MESSAGE_UNIT_RELOADING
;
1415 /* Note that we deliberately use LOG_MESSAGE() instead of
1416 * LOG_UNIT_MESSAGE() here, since this is supposed to mimic
1417 * closely what is written to screen using the status output,
1418 * which is supposed the highest level, friendliest output
1419 * possible, which means we should avoid the low-level unit
1421 log_struct(LOG_INFO
,
1422 LOG_MESSAGE_ID(mid
),
1424 LOG_MESSAGE("%s", buf
),
1428 void unit_status_emit_starting_stopping_reloading(Unit
*u
, JobType t
) {
1431 assert(t
< _JOB_TYPE_MAX
);
1433 unit_status_log_starting_stopping_reloading(u
, t
);
1434 unit_status_print_starting_stopping(u
, t
);
1437 static int unit_start_limit_test(Unit
*u
) {
1440 if (ratelimit_test(&u
->start_limit
)) {
1441 u
->start_limit_hit
= false;
1445 log_unit_warning(u
, "Start request repeated too quickly.");
1446 u
->start_limit_hit
= true;
1448 return failure_action(u
->manager
, u
->start_limit_action
, u
->reboot_arg
);
1452 * -EBADR: This unit type does not support starting.
1453 * -EALREADY: Unit is already started.
1454 * -EAGAIN: An operation is already in progress. Retry later.
1455 * -ECANCELED: Too many requests for now.
1456 * -EPROTO: Assert failed
1457 * -EINVAL: Unit not loaded
1458 * -EOPNOTSUPP: Unit type not supported
1460 int unit_start(Unit
*u
) {
1461 UnitActiveState state
;
1467 /* If this is already started, then this will succeed. Note
1468 * that this will even succeed if this unit is not startable
1469 * by the user. This is relied on to detect when we need to
1470 * wait for units and when waiting is finished. */
1471 state
= unit_active_state(u
);
1472 if (UNIT_IS_ACTIVE_OR_RELOADING(state
))
1475 /* Make sure we don't enter a busy loop of some kind. */
1476 r
= unit_start_limit_test(u
);
1480 /* Units that aren't loaded cannot be started */
1481 if (u
->load_state
!= UNIT_LOADED
)
1484 /* If the conditions failed, don't do anything at all. If we
1485 * already are activating this call might still be useful to
1486 * speed up activation in case there is some hold-off time,
1487 * but we don't want to recheck the condition in that case. */
1488 if (state
!= UNIT_ACTIVATING
&&
1489 !unit_condition_test(u
)) {
1490 log_unit_debug(u
, "Starting requested but condition failed. Not starting unit.");
1494 /* If the asserts failed, fail the entire job */
1495 if (state
!= UNIT_ACTIVATING
&&
1496 !unit_assert_test(u
)) {
1497 log_unit_notice(u
, "Starting requested but asserts failed.");
1501 /* Units of types that aren't supported cannot be
1502 * started. Note that we do this test only after the condition
1503 * checks, so that we rather return condition check errors
1504 * (which are usually not considered a true failure) than "not
1505 * supported" errors (which are considered a failure).
1507 if (!unit_supported(u
))
1510 /* Forward to the main object, if we aren't it. */
1511 following
= unit_following(u
);
1513 log_unit_debug(u
, "Redirecting start request from %s to %s.", u
->id
, following
->id
);
1514 return unit_start(following
);
1517 /* If it is stopped, but we cannot start it, then fail */
1518 if (!UNIT_VTABLE(u
)->start
)
1521 /* We don't suppress calls to ->start() here when we are
1522 * already starting, to allow this request to be used as a
1523 * "hurry up" call, for example when the unit is in some "auto
1524 * restart" state where it waits for a holdoff timer to elapse
1525 * before it will start again. */
1527 unit_add_to_dbus_queue(u
);
1529 return UNIT_VTABLE(u
)->start(u
);
1532 bool unit_can_start(Unit
*u
) {
1535 if (u
->load_state
!= UNIT_LOADED
)
1538 if (!unit_supported(u
))
1541 return !!UNIT_VTABLE(u
)->start
;
1544 bool unit_can_isolate(Unit
*u
) {
1547 return unit_can_start(u
) &&
1552 * -EBADR: This unit type does not support stopping.
1553 * -EALREADY: Unit is already stopped.
1554 * -EAGAIN: An operation is already in progress. Retry later.
1556 int unit_stop(Unit
*u
) {
1557 UnitActiveState state
;
1562 state
= unit_active_state(u
);
1563 if (UNIT_IS_INACTIVE_OR_FAILED(state
))
1566 following
= unit_following(u
);
1568 log_unit_debug(u
, "Redirecting stop request from %s to %s.", u
->id
, following
->id
);
1569 return unit_stop(following
);
1572 if (!UNIT_VTABLE(u
)->stop
)
1575 unit_add_to_dbus_queue(u
);
1577 return UNIT_VTABLE(u
)->stop(u
);
1581 * -EBADR: This unit type does not support reloading.
1582 * -ENOEXEC: Unit is not started.
1583 * -EAGAIN: An operation is already in progress. Retry later.
1585 int unit_reload(Unit
*u
) {
1586 UnitActiveState state
;
1591 if (u
->load_state
!= UNIT_LOADED
)
1594 if (!unit_can_reload(u
))
1597 state
= unit_active_state(u
);
1598 if (state
== UNIT_RELOADING
)
1601 if (state
!= UNIT_ACTIVE
) {
1602 log_unit_warning(u
, "Unit cannot be reloaded because it is inactive.");
1606 following
= unit_following(u
);
1608 log_unit_debug(u
, "Redirecting reload request from %s to %s.", u
->id
, following
->id
);
1609 return unit_reload(following
);
1612 unit_add_to_dbus_queue(u
);
1614 return UNIT_VTABLE(u
)->reload(u
);
1617 bool unit_can_reload(Unit
*u
) {
1620 if (!UNIT_VTABLE(u
)->reload
)
1623 if (!UNIT_VTABLE(u
)->can_reload
)
1626 return UNIT_VTABLE(u
)->can_reload(u
);
1629 static void unit_check_unneeded(Unit
*u
) {
1631 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
1633 static const UnitDependency needed_dependencies
[] = {
1647 /* If this service shall be shut down when unneeded then do
1650 if (!u
->stop_when_unneeded
)
1653 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
1656 for (j
= 0; j
< ELEMENTSOF(needed_dependencies
); j
++)
1657 SET_FOREACH(other
, u
->dependencies
[needed_dependencies
[j
]], i
)
1658 if (unit_active_or_pending(other
))
1661 /* If stopping a unit fails continously we might enter a stop
1662 * loop here, hence stop acting on the service being
1663 * unnecessary after a while. */
1664 if (!ratelimit_test(&u
->auto_stop_ratelimit
)) {
1665 log_unit_warning(u
, "Unit not needed anymore, but not stopping since we tried this too often recently.");
1669 log_unit_info(u
, "Unit not needed anymore. Stopping.");
1671 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
1672 r
= manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_FAIL
, &error
, NULL
);
1674 log_unit_warning_errno(u
, r
, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error
, r
));
1677 static void unit_check_binds_to(Unit
*u
) {
1678 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
1689 if (unit_active_state(u
) != UNIT_ACTIVE
)
1692 SET_FOREACH(other
, u
->dependencies
[UNIT_BINDS_TO
], i
) {
1696 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
1706 /* If stopping a unit fails continously we might enter a stop
1707 * loop here, hence stop acting on the service being
1708 * unnecessary after a while. */
1709 if (!ratelimit_test(&u
->auto_stop_ratelimit
)) {
1710 log_unit_warning(u
, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other
->id
);
1715 log_unit_info(u
, "Unit is bound to inactive unit %s. Stopping, too.", other
->id
);
1717 /* A unit we need to run is gone. Sniff. Let's stop this. */
1718 r
= manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_FAIL
, &error
, NULL
);
1720 log_unit_warning_errno(u
, r
, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error
, r
));
1723 static void retroactively_start_dependencies(Unit
*u
) {
1728 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)));
1730 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUIRES
], i
)
1731 if (!set_get(u
->dependencies
[UNIT_AFTER
], other
) &&
1732 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
1733 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, NULL
, NULL
);
1735 SET_FOREACH(other
, u
->dependencies
[UNIT_BINDS_TO
], i
)
1736 if (!set_get(u
->dependencies
[UNIT_AFTER
], other
) &&
1737 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
1738 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, NULL
, NULL
);
1740 SET_FOREACH(other
, u
->dependencies
[UNIT_WANTS
], i
)
1741 if (!set_get(u
->dependencies
[UNIT_AFTER
], other
) &&
1742 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
1743 manager_add_job(u
->manager
, JOB_START
, other
, JOB_FAIL
, NULL
, NULL
);
1745 SET_FOREACH(other
, u
->dependencies
[UNIT_CONFLICTS
], i
)
1746 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1747 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
);
1749 SET_FOREACH(other
, u
->dependencies
[UNIT_CONFLICTED_BY
], i
)
1750 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1751 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
);
1754 static void retroactively_stop_dependencies(Unit
*u
) {
1759 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
1761 /* Pull down units which are bound to us recursively if enabled */
1762 SET_FOREACH(other
, u
->dependencies
[UNIT_BOUND_BY
], i
)
1763 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1764 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
);
1767 static void check_unneeded_dependencies(Unit
*u
) {
1772 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
1774 /* Garbage collect services that might not be needed anymore, if enabled */
1775 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUIRES
], i
)
1776 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1777 unit_check_unneeded(other
);
1778 SET_FOREACH(other
, u
->dependencies
[UNIT_WANTS
], i
)
1779 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1780 unit_check_unneeded(other
);
1781 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUISITE
], i
)
1782 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1783 unit_check_unneeded(other
);
1784 SET_FOREACH(other
, u
->dependencies
[UNIT_BINDS_TO
], i
)
1785 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1786 unit_check_unneeded(other
);
1789 void unit_start_on_failure(Unit
*u
) {
1795 if (set_size(u
->dependencies
[UNIT_ON_FAILURE
]) <= 0)
1798 log_unit_info(u
, "Triggering OnFailure= dependencies.");
1800 SET_FOREACH(other
, u
->dependencies
[UNIT_ON_FAILURE
], i
) {
1803 r
= manager_add_job(u
->manager
, JOB_START
, other
, u
->on_failure_job_mode
, NULL
, NULL
);
1805 log_unit_error_errno(u
, r
, "Failed to enqueue OnFailure= job: %m");
1809 void unit_trigger_notify(Unit
*u
) {
1815 SET_FOREACH(other
, u
->dependencies
[UNIT_TRIGGERED_BY
], i
)
1816 if (UNIT_VTABLE(other
)->trigger_notify
)
1817 UNIT_VTABLE(other
)->trigger_notify(other
, u
);
1820 void unit_notify(Unit
*u
, UnitActiveState os
, UnitActiveState ns
, bool reload_success
) {
1825 assert(os
< _UNIT_ACTIVE_STATE_MAX
);
1826 assert(ns
< _UNIT_ACTIVE_STATE_MAX
);
1828 /* Note that this is called for all low-level state changes,
1829 * even if they might map to the same high-level
1830 * UnitActiveState! That means that ns == os is an expected
1831 * behavior here. For example: if a mount point is remounted
1832 * this function will be called too! */
1836 /* Update timestamps for state changes */
1837 if (m
->n_reloading
<= 0) {
1838 dual_timestamp_get(&u
->state_change_timestamp
);
1840 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && !UNIT_IS_INACTIVE_OR_FAILED(ns
))
1841 u
->inactive_exit_timestamp
= u
->state_change_timestamp
;
1842 else if (!UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_INACTIVE_OR_FAILED(ns
))
1843 u
->inactive_enter_timestamp
= u
->state_change_timestamp
;
1845 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
) && UNIT_IS_ACTIVE_OR_RELOADING(ns
))
1846 u
->active_enter_timestamp
= u
->state_change_timestamp
;
1847 else if (UNIT_IS_ACTIVE_OR_RELOADING(os
) && !UNIT_IS_ACTIVE_OR_RELOADING(ns
))
1848 u
->active_exit_timestamp
= u
->state_change_timestamp
;
1851 /* Keep track of failed units */
1852 (void) manager_update_failed_units(u
->manager
, u
, ns
== UNIT_FAILED
);
1854 /* Make sure the cgroup is always removed when we become inactive */
1855 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
1856 unit_prune_cgroup(u
);
1858 /* Note that this doesn't apply to RemainAfterExit services exiting
1859 * successfully, since there's no change of state in that case. Which is
1860 * why it is handled in service_set_state() */
1861 if (UNIT_IS_INACTIVE_OR_FAILED(os
) != UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
1864 ec
= unit_get_exec_context(u
);
1865 if (ec
&& exec_context_may_touch_console(ec
)) {
1866 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
1869 if (m
->n_on_console
== 0)
1870 /* unset no_console_output flag, since the console is free */
1871 m
->no_console_output
= false;
1880 if (u
->job
->state
== JOB_WAITING
)
1882 /* So we reached a different state for this
1883 * job. Let's see if we can run it now if it
1884 * failed previously due to EAGAIN. */
1885 job_add_to_run_queue(u
->job
);
1887 /* Let's check whether this state change constitutes a
1888 * finished job, or maybe contradicts a running job and
1889 * hence needs to invalidate jobs. */
1891 switch (u
->job
->type
) {
1894 case JOB_VERIFY_ACTIVE
:
1896 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
))
1897 job_finish_and_invalidate(u
->job
, JOB_DONE
, true);
1898 else if (u
->job
->state
== JOB_RUNNING
&& ns
!= UNIT_ACTIVATING
) {
1901 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
1902 job_finish_and_invalidate(u
->job
, ns
== UNIT_FAILED
? JOB_FAILED
: JOB_DONE
, true);
1908 case JOB_RELOAD_OR_START
:
1909 case JOB_TRY_RELOAD
:
1911 if (u
->job
->state
== JOB_RUNNING
) {
1912 if (ns
== UNIT_ACTIVE
)
1913 job_finish_and_invalidate(u
->job
, reload_success
? JOB_DONE
: JOB_FAILED
, true);
1914 else if (ns
!= UNIT_ACTIVATING
&& ns
!= UNIT_RELOADING
) {
1917 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
1918 job_finish_and_invalidate(u
->job
, ns
== UNIT_FAILED
? JOB_FAILED
: JOB_DONE
, true);
1926 case JOB_TRY_RESTART
:
1928 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
1929 job_finish_and_invalidate(u
->job
, JOB_DONE
, true);
1930 else if (u
->job
->state
== JOB_RUNNING
&& ns
!= UNIT_DEACTIVATING
) {
1932 job_finish_and_invalidate(u
->job
, JOB_FAILED
, true);
1938 assert_not_reached("Job type unknown");
1944 if (m
->n_reloading
<= 0) {
1946 /* If this state change happened without being
1947 * requested by a job, then let's retroactively start
1948 * or stop dependencies. We skip that step when
1949 * deserializing, since we don't want to create any
1950 * additional jobs just because something is already
1954 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns
))
1955 retroactively_start_dependencies(u
);
1956 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os
) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
1957 retroactively_stop_dependencies(u
);
1960 /* stop unneeded units regardless if going down was expected or not */
1961 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
1962 check_unneeded_dependencies(u
);
1964 if (ns
!= os
&& ns
== UNIT_FAILED
) {
1965 log_unit_notice(u
, "Unit entered failed state.");
1966 unit_start_on_failure(u
);
1970 /* Some names are special */
1971 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
)) {
1973 if (unit_has_name(u
, SPECIAL_DBUS_SERVICE
))
1974 /* The bus might have just become available,
1975 * hence try to connect to it, if we aren't
1979 if (u
->type
== UNIT_SERVICE
&&
1980 !UNIT_IS_ACTIVE_OR_RELOADING(os
) &&
1981 m
->n_reloading
<= 0) {
1982 /* Write audit record if we have just finished starting up */
1983 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_START
, true);
1987 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
))
1988 manager_send_unit_plymouth(m
, u
);
1992 /* We don't care about D-Bus here, since we'll get an
1993 * asynchronous notification for it anyway. */
1995 if (u
->type
== UNIT_SERVICE
&&
1996 UNIT_IS_INACTIVE_OR_FAILED(ns
) &&
1997 !UNIT_IS_INACTIVE_OR_FAILED(os
) &&
1998 m
->n_reloading
<= 0) {
2000 /* Hmm, if there was no start record written
2001 * write it now, so that we always have a nice
2004 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_START
, ns
== UNIT_INACTIVE
);
2006 if (ns
== UNIT_INACTIVE
)
2007 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_STOP
, true);
2009 /* Write audit record if we have just finished shutting down */
2010 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_STOP
, ns
== UNIT_INACTIVE
);
2012 u
->in_audit
= false;
2016 manager_recheck_journal(m
);
2017 unit_trigger_notify(u
);
2019 if (u
->manager
->n_reloading
<= 0) {
2020 /* Maybe we finished startup and are now ready for
2021 * being stopped because unneeded? */
2022 unit_check_unneeded(u
);
2024 /* Maybe we finished startup, but something we needed
2025 * has vanished? Let's die then. (This happens when
2026 * something BindsTo= to a Type=oneshot unit, as these
2027 * units go directly from starting to inactive,
2028 * without ever entering started.) */
2029 unit_check_binds_to(u
);
2032 unit_add_to_dbus_queue(u
);
2033 unit_add_to_gc_queue(u
);
2036 int unit_watch_pid(Unit
*u
, pid_t pid
) {
2042 /* Watch a specific PID. We only support one or two units
2043 * watching each PID for now, not more. */
2045 r
= set_ensure_allocated(&u
->pids
, NULL
);
2049 r
= hashmap_ensure_allocated(&u
->manager
->watch_pids1
, NULL
);
2053 r
= hashmap_put(u
->manager
->watch_pids1
, PID_TO_PTR(pid
), u
);
2055 r
= hashmap_ensure_allocated(&u
->manager
->watch_pids2
, NULL
);
2059 r
= hashmap_put(u
->manager
->watch_pids2
, PID_TO_PTR(pid
), u
);
2062 q
= set_put(u
->pids
, PID_TO_PTR(pid
));
2069 void unit_unwatch_pid(Unit
*u
, pid_t pid
) {
2073 (void) hashmap_remove_value(u
->manager
->watch_pids1
, PID_TO_PTR(pid
), u
);
2074 (void) hashmap_remove_value(u
->manager
->watch_pids2
, PID_TO_PTR(pid
), u
);
2075 (void) set_remove(u
->pids
, PID_TO_PTR(pid
));
2078 void unit_unwatch_all_pids(Unit
*u
) {
2081 while (!set_isempty(u
->pids
))
2082 unit_unwatch_pid(u
, PTR_TO_PID(set_first(u
->pids
)));
2084 u
->pids
= set_free(u
->pids
);
2087 void unit_tidy_watch_pids(Unit
*u
, pid_t except1
, pid_t except2
) {
2093 /* Cleans dead PIDs from our list */
2095 SET_FOREACH(e
, u
->pids
, i
) {
2096 pid_t pid
= PTR_TO_PID(e
);
2098 if (pid
== except1
|| pid
== except2
)
2101 if (!pid_is_unwaited(pid
))
2102 unit_unwatch_pid(u
, pid
);
2106 bool unit_job_is_applicable(Unit
*u
, JobType j
) {
2108 assert(j
>= 0 && j
< _JOB_TYPE_MAX
);
2112 case JOB_VERIFY_ACTIVE
:
2119 case JOB_TRY_RESTART
:
2120 return unit_can_start(u
);
2123 case JOB_TRY_RELOAD
:
2124 return unit_can_reload(u
);
2126 case JOB_RELOAD_OR_START
:
2127 return unit_can_reload(u
) && unit_can_start(u
);
2130 assert_not_reached("Invalid job type");
2134 static void maybe_warn_about_dependency(Unit
*u
, const char *other
, UnitDependency dependency
) {
2137 /* Only warn about some unit types */
2138 if (!IN_SET(dependency
, UNIT_CONFLICTS
, UNIT_CONFLICTED_BY
, UNIT_BEFORE
, UNIT_AFTER
, UNIT_ON_FAILURE
, UNIT_TRIGGERS
, UNIT_TRIGGERED_BY
))
2141 if (streq_ptr(u
->id
, other
))
2142 log_unit_warning(u
, "Dependency %s=%s dropped", unit_dependency_to_string(dependency
), u
->id
);
2144 log_unit_warning(u
, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency
), strna(other
), u
->id
);
2147 int unit_add_dependency(Unit
*u
, UnitDependency d
, Unit
*other
, bool add_reference
) {
2149 static const UnitDependency inverse_table
[_UNIT_DEPENDENCY_MAX
] = {
2150 [UNIT_REQUIRES
] = UNIT_REQUIRED_BY
,
2151 [UNIT_WANTS
] = UNIT_WANTED_BY
,
2152 [UNIT_REQUISITE
] = UNIT_REQUISITE_OF
,
2153 [UNIT_BINDS_TO
] = UNIT_BOUND_BY
,
2154 [UNIT_PART_OF
] = UNIT_CONSISTS_OF
,
2155 [UNIT_REQUIRED_BY
] = UNIT_REQUIRES
,
2156 [UNIT_REQUISITE_OF
] = UNIT_REQUISITE
,
2157 [UNIT_WANTED_BY
] = UNIT_WANTS
,
2158 [UNIT_BOUND_BY
] = UNIT_BINDS_TO
,
2159 [UNIT_CONSISTS_OF
] = UNIT_PART_OF
,
2160 [UNIT_CONFLICTS
] = UNIT_CONFLICTED_BY
,
2161 [UNIT_CONFLICTED_BY
] = UNIT_CONFLICTS
,
2162 [UNIT_BEFORE
] = UNIT_AFTER
,
2163 [UNIT_AFTER
] = UNIT_BEFORE
,
2164 [UNIT_ON_FAILURE
] = _UNIT_DEPENDENCY_INVALID
,
2165 [UNIT_REFERENCES
] = UNIT_REFERENCED_BY
,
2166 [UNIT_REFERENCED_BY
] = UNIT_REFERENCES
,
2167 [UNIT_TRIGGERS
] = UNIT_TRIGGERED_BY
,
2168 [UNIT_TRIGGERED_BY
] = UNIT_TRIGGERS
,
2169 [UNIT_PROPAGATES_RELOAD_TO
] = UNIT_RELOAD_PROPAGATED_FROM
,
2170 [UNIT_RELOAD_PROPAGATED_FROM
] = UNIT_PROPAGATES_RELOAD_TO
,
2171 [UNIT_JOINS_NAMESPACE_OF
] = UNIT_JOINS_NAMESPACE_OF
,
2173 int r
, q
= 0, v
= 0, w
= 0;
2174 Unit
*orig_u
= u
, *orig_other
= other
;
2177 assert(d
>= 0 && d
< _UNIT_DEPENDENCY_MAX
);
2180 u
= unit_follow_merge(u
);
2181 other
= unit_follow_merge(other
);
2183 /* We won't allow dependencies on ourselves. We will not
2184 * consider them an error however. */
2186 maybe_warn_about_dependency(orig_u
, orig_other
->id
, d
);
2190 r
= set_ensure_allocated(&u
->dependencies
[d
], NULL
);
2194 if (inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
) {
2195 r
= set_ensure_allocated(&other
->dependencies
[inverse_table
[d
]], NULL
);
2200 if (add_reference
) {
2201 r
= set_ensure_allocated(&u
->dependencies
[UNIT_REFERENCES
], NULL
);
2205 r
= set_ensure_allocated(&other
->dependencies
[UNIT_REFERENCED_BY
], NULL
);
2210 q
= set_put(u
->dependencies
[d
], other
);
2214 if (inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
&& inverse_table
[d
] != d
) {
2215 v
= set_put(other
->dependencies
[inverse_table
[d
]], u
);
2222 if (add_reference
) {
2223 w
= set_put(u
->dependencies
[UNIT_REFERENCES
], other
);
2229 r
= set_put(other
->dependencies
[UNIT_REFERENCED_BY
], u
);
2234 unit_add_to_dbus_queue(u
);
2239 set_remove(u
->dependencies
[d
], other
);
2242 set_remove(other
->dependencies
[inverse_table
[d
]], u
);
2245 set_remove(u
->dependencies
[UNIT_REFERENCES
], other
);
2250 int unit_add_two_dependencies(Unit
*u
, UnitDependency d
, UnitDependency e
, Unit
*other
, bool add_reference
) {
2255 r
= unit_add_dependency(u
, d
, other
, add_reference
);
2259 return unit_add_dependency(u
, e
, other
, add_reference
);
2262 static int resolve_template(Unit
*u
, const char *name
, const char*path
, char **buf
, const char **ret
) {
2266 assert(name
|| path
);
2271 name
= basename(path
);
2273 if (!unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
2280 r
= unit_name_replace_instance(name
, u
->instance
, buf
);
2282 _cleanup_free_
char *i
= NULL
;
2284 r
= unit_name_to_prefix(u
->id
, &i
);
2288 r
= unit_name_replace_instance(name
, i
, buf
);
2297 int unit_add_dependency_by_name(Unit
*u
, UnitDependency d
, const char *name
, const char *path
, bool add_reference
) {
2298 _cleanup_free_
char *buf
= NULL
;
2303 assert(name
|| path
);
2305 r
= resolve_template(u
, name
, path
, &buf
, &name
);
2309 r
= manager_load_unit(u
->manager
, name
, path
, NULL
, &other
);
2313 return unit_add_dependency(u
, d
, other
, add_reference
);
2316 int unit_add_two_dependencies_by_name(Unit
*u
, UnitDependency d
, UnitDependency e
, const char *name
, const char *path
, bool add_reference
) {
2317 _cleanup_free_
char *buf
= NULL
;
2322 assert(name
|| path
);
2324 r
= resolve_template(u
, name
, path
, &buf
, &name
);
2328 r
= manager_load_unit(u
->manager
, name
, path
, NULL
, &other
);
2332 return unit_add_two_dependencies(u
, d
, e
, other
, add_reference
);
2335 int set_unit_path(const char *p
) {
2336 /* This is mostly for debug purposes */
2337 if (setenv("SYSTEMD_UNIT_PATH", p
, 1) < 0)
2343 char *unit_dbus_path(Unit
*u
) {
2349 return unit_dbus_path_from_name(u
->id
);
2352 int unit_set_slice(Unit
*u
, Unit
*slice
) {
2356 /* Sets the unit slice if it has not been set before. Is extra
2357 * careful, to only allow this for units that actually have a
2358 * cgroup context. Also, we don't allow to set this for slices
2359 * (since the parent slice is derived from the name). Make
2360 * sure the unit we set is actually a slice. */
2362 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
2365 if (u
->type
== UNIT_SLICE
)
2368 if (unit_active_state(u
) != UNIT_INACTIVE
)
2371 if (slice
->type
!= UNIT_SLICE
)
2374 if (unit_has_name(u
, SPECIAL_INIT_SCOPE
) &&
2375 !unit_has_name(slice
, SPECIAL_ROOT_SLICE
))
2378 if (UNIT_DEREF(u
->slice
) == slice
)
2381 if (UNIT_ISSET(u
->slice
))
2384 unit_ref_set(&u
->slice
, slice
);
2388 int unit_set_default_slice(Unit
*u
) {
2389 _cleanup_free_
char *b
= NULL
;
2390 const char *slice_name
;
2396 if (UNIT_ISSET(u
->slice
))
2400 _cleanup_free_
char *prefix
= NULL
, *escaped
= NULL
;
2402 /* Implicitly place all instantiated units in their
2403 * own per-template slice */
2405 r
= unit_name_to_prefix(u
->id
, &prefix
);
2409 /* The prefix is already escaped, but it might include
2410 * "-" which has a special meaning for slice units,
2411 * hence escape it here extra. */
2412 escaped
= unit_name_escape(prefix
);
2416 if (u
->manager
->running_as
== MANAGER_SYSTEM
)
2417 b
= strjoin("system-", escaped
, ".slice", NULL
);
2419 b
= strappend(escaped
, ".slice");
2426 u
->manager
->running_as
== MANAGER_SYSTEM
&& !unit_has_name(u
, SPECIAL_INIT_SCOPE
)
2427 ? SPECIAL_SYSTEM_SLICE
2428 : SPECIAL_ROOT_SLICE
;
2430 r
= manager_load_unit(u
->manager
, slice_name
, NULL
, NULL
, &slice
);
2434 return unit_set_slice(u
, slice
);
2437 const char *unit_slice_name(Unit
*u
) {
2440 if (!UNIT_ISSET(u
->slice
))
2443 return UNIT_DEREF(u
->slice
)->id
;
2446 int unit_load_related_unit(Unit
*u
, const char *type
, Unit
**_found
) {
2447 _cleanup_free_
char *t
= NULL
;
2454 r
= unit_name_change_suffix(u
->id
, type
, &t
);
2457 if (unit_has_name(u
, t
))
2460 r
= manager_load_unit(u
->manager
, t
, NULL
, NULL
, _found
);
2461 assert(r
< 0 || *_found
!= u
);
2465 static int signal_name_owner_changed(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
2466 const char *name
, *old_owner
, *new_owner
;
2473 r
= sd_bus_message_read(message
, "sss", &name
, &old_owner
, &new_owner
);
2475 bus_log_parse_error(r
);
2479 if (UNIT_VTABLE(u
)->bus_name_owner_change
)
2480 UNIT_VTABLE(u
)->bus_name_owner_change(u
, name
, old_owner
, new_owner
);
2485 int unit_install_bus_match(Unit
*u
, sd_bus
*bus
, const char *name
) {
2492 if (u
->match_bus_slot
)
2495 match
= strjoina("type='signal',"
2496 "sender='org.freedesktop.DBus',"
2497 "path='/org/freedesktop/DBus',"
2498 "interface='org.freedesktop.DBus',"
2499 "member='NameOwnerChanged',"
2500 "arg0='", name
, "'",
2503 return sd_bus_add_match(bus
, &u
->match_bus_slot
, match
, signal_name_owner_changed
, u
);
2506 int unit_watch_bus_name(Unit
*u
, const char *name
) {
2512 /* Watch a specific name on the bus. We only support one unit
2513 * watching each name for now. */
2515 if (u
->manager
->api_bus
) {
2516 /* If the bus is already available, install the match directly.
2517 * Otherwise, just put the name in the list. bus_setup_api() will take care later. */
2518 r
= unit_install_bus_match(u
, u
->manager
->api_bus
, name
);
2520 return log_warning_errno(r
, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name
);
2523 r
= hashmap_put(u
->manager
->watch_bus
, name
, u
);
2525 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
2526 return log_warning_errno(r
, "Failed to put bus name to hashmap: %m");
2532 void unit_unwatch_bus_name(Unit
*u
, const char *name
) {
2536 hashmap_remove_value(u
->manager
->watch_bus
, name
, u
);
2537 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
2540 bool unit_can_serialize(Unit
*u
) {
2543 return UNIT_VTABLE(u
)->serialize
&& UNIT_VTABLE(u
)->deserialize_item
;
2546 int unit_serialize(Unit
*u
, FILE *f
, FDSet
*fds
, bool serialize_jobs
) {
2553 if (unit_can_serialize(u
)) {
2556 r
= UNIT_VTABLE(u
)->serialize(u
, f
, fds
);
2560 rt
= unit_get_exec_runtime(u
);
2562 r
= exec_runtime_serialize(u
, rt
, f
, fds
);
2568 dual_timestamp_serialize(f
, "state-change-timestamp", &u
->state_change_timestamp
);
2570 dual_timestamp_serialize(f
, "inactive-exit-timestamp", &u
->inactive_exit_timestamp
);
2571 dual_timestamp_serialize(f
, "active-enter-timestamp", &u
->active_enter_timestamp
);
2572 dual_timestamp_serialize(f
, "active-exit-timestamp", &u
->active_exit_timestamp
);
2573 dual_timestamp_serialize(f
, "inactive-enter-timestamp", &u
->inactive_enter_timestamp
);
2575 dual_timestamp_serialize(f
, "condition-timestamp", &u
->condition_timestamp
);
2576 dual_timestamp_serialize(f
, "assert-timestamp", &u
->assert_timestamp
);
2578 if (dual_timestamp_is_set(&u
->condition_timestamp
))
2579 unit_serialize_item(u
, f
, "condition-result", yes_no(u
->condition_result
));
2581 if (dual_timestamp_is_set(&u
->assert_timestamp
))
2582 unit_serialize_item(u
, f
, "assert-result", yes_no(u
->assert_result
));
2584 unit_serialize_item(u
, f
, "transient", yes_no(u
->transient
));
2585 unit_serialize_item_format(u
, f
, "cpuacct-usage-base", "%" PRIu64
, u
->cpuacct_usage_base
);
2588 unit_serialize_item(u
, f
, "cgroup", u
->cgroup_path
);
2589 unit_serialize_item(u
, f
, "cgroup-realized", yes_no(u
->cgroup_realized
));
2591 if (serialize_jobs
) {
2593 fprintf(f
, "job\n");
2594 job_serialize(u
->job
, f
, fds
);
2598 fprintf(f
, "job\n");
2599 job_serialize(u
->nop_job
, f
, fds
);
2608 int unit_serialize_item(Unit
*u
, FILE *f
, const char *key
, const char *value
) {
2624 int unit_serialize_item_escaped(Unit
*u
, FILE *f
, const char *key
, const char *value
) {
2625 _cleanup_free_
char *c
= NULL
;
2646 int unit_serialize_item_fd(Unit
*u
, FILE *f
, FDSet
*fds
, const char *key
, int fd
) {
2656 copy
= fdset_put_dup(fds
, fd
);
2660 fprintf(f
, "%s=%i\n", key
, copy
);
2664 void unit_serialize_item_format(Unit
*u
, FILE *f
, const char *key
, const char *format
, ...) {
2675 va_start(ap
, format
);
2676 vfprintf(f
, format
, ap
);
2682 int unit_deserialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2683 ExecRuntime
**rt
= NULL
;
2691 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
2693 rt
= (ExecRuntime
**) ((uint8_t*) u
+ offset
);
2696 char line
[LINE_MAX
], *l
, *v
;
2699 if (!fgets(line
, sizeof(line
), f
)) {
2712 k
= strcspn(l
, "=");
2720 if (streq(l
, "job")) {
2722 /* new-style serialized job */
2729 r
= job_deserialize(j
, f
, fds
);
2735 r
= hashmap_put(u
->manager
->jobs
, UINT32_TO_PTR(j
->id
), j
);
2741 r
= job_install_deserialized(j
);
2743 hashmap_remove(u
->manager
->jobs
, UINT32_TO_PTR(j
->id
));
2747 } else /* legacy for pre-44 */
2748 log_unit_warning(u
, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v
);
2750 } else if (streq(l
, "state-change-timestamp")) {
2751 dual_timestamp_deserialize(v
, &u
->state_change_timestamp
);
2753 } else if (streq(l
, "inactive-exit-timestamp")) {
2754 dual_timestamp_deserialize(v
, &u
->inactive_exit_timestamp
);
2756 } else if (streq(l
, "active-enter-timestamp")) {
2757 dual_timestamp_deserialize(v
, &u
->active_enter_timestamp
);
2759 } else if (streq(l
, "active-exit-timestamp")) {
2760 dual_timestamp_deserialize(v
, &u
->active_exit_timestamp
);
2762 } else if (streq(l
, "inactive-enter-timestamp")) {
2763 dual_timestamp_deserialize(v
, &u
->inactive_enter_timestamp
);
2765 } else if (streq(l
, "condition-timestamp")) {
2766 dual_timestamp_deserialize(v
, &u
->condition_timestamp
);
2768 } else if (streq(l
, "assert-timestamp")) {
2769 dual_timestamp_deserialize(v
, &u
->assert_timestamp
);
2771 } else if (streq(l
, "condition-result")) {
2773 r
= parse_boolean(v
);
2775 log_unit_debug(u
, "Failed to parse condition result value %s, ignoring.", v
);
2777 u
->condition_result
= r
;
2781 } else if (streq(l
, "assert-result")) {
2783 r
= parse_boolean(v
);
2785 log_unit_debug(u
, "Failed to parse assert result value %s, ignoring.", v
);
2787 u
->assert_result
= r
;
2791 } else if (streq(l
, "transient")) {
2793 r
= parse_boolean(v
);
2795 log_unit_debug(u
, "Failed to parse transient bool %s, ignoring.", v
);
2801 } else if (streq(l
, "cpuacct-usage-base")) {
2803 r
= safe_atou64(v
, &u
->cpuacct_usage_base
);
2805 log_unit_debug(u
, "Failed to parse CPU usage %s, ignoring.", v
);
2809 } else if (streq(l
, "cgroup")) {
2811 r
= unit_set_cgroup_path(u
, v
);
2813 log_unit_debug_errno(u
, r
, "Failed to set cgroup path %s, ignoring: %m", v
);
2815 (void) unit_watch_cgroup(u
);
2818 } else if (streq(l
, "cgroup-realized")) {
2821 b
= parse_boolean(v
);
2823 log_unit_debug(u
, "Failed to parse cgroup-realized bool %s, ignoring.", v
);
2825 u
->cgroup_realized
= b
;
2830 if (unit_can_serialize(u
)) {
2832 r
= exec_runtime_deserialize_item(u
, rt
, l
, v
, fds
);
2834 log_unit_warning(u
, "Failed to deserialize runtime parameter '%s', ignoring.", l
);
2838 /* Returns positive if key was handled by the call */
2843 r
= UNIT_VTABLE(u
)->deserialize_item(u
, l
, v
, fds
);
2845 log_unit_warning(u
, "Failed to deserialize unit parameter '%s', ignoring.", l
);
2849 /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is
2850 * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from
2851 * before 228 where the base for timeouts was not persistent across reboots. */
2853 if (!dual_timestamp_is_set(&u
->state_change_timestamp
))
2854 dual_timestamp_get(&u
->state_change_timestamp
);
2859 int unit_add_node_link(Unit
*u
, const char *what
, bool wants
, UnitDependency dep
) {
2861 _cleanup_free_
char *e
= NULL
;
2866 /* Adds in links to the device node that this unit is based on */
2870 if (!is_device_path(what
))
2873 /* When device units aren't supported (such as in a
2874 * container), don't create dependencies on them. */
2875 if (!unit_type_supported(UNIT_DEVICE
))
2878 r
= unit_name_from_path(what
, ".device", &e
);
2882 r
= manager_load_unit(u
->manager
, e
, NULL
, NULL
, &device
);
2886 r
= unit_add_two_dependencies(u
, UNIT_AFTER
,
2887 u
->manager
->running_as
== MANAGER_SYSTEM
? dep
: UNIT_WANTS
,
2893 r
= unit_add_dependency(device
, UNIT_WANTS
, u
, false);
2901 int unit_coldplug(Unit
*u
) {
2906 /* Make sure we don't enter a loop, when coldplugging
2911 u
->coldplugged
= true;
2913 if (UNIT_VTABLE(u
)->coldplug
)
2914 r
= UNIT_VTABLE(u
)->coldplug(u
);
2917 q
= job_coldplug(u
->job
);
2927 static bool fragment_mtime_changed(const char *path
, usec_t mtime
) {
2933 if (stat(path
, &st
) < 0)
2934 /* What, cannot access this anymore? */
2938 /* For non-empty files check the mtime */
2939 return timespec_load(&st
.st_mtim
) != mtime
;
2940 else if (!null_or_empty(&st
))
2941 /* For masked files check if they are still so */
2947 bool unit_need_daemon_reload(Unit
*u
) {
2948 _cleanup_strv_free_
char **t
= NULL
;
2950 unsigned loaded_cnt
, current_cnt
;
2954 if (fragment_mtime_changed(u
->fragment_path
, u
->fragment_mtime
) ||
2955 fragment_mtime_changed(u
->source_path
, u
->source_mtime
))
2958 (void) unit_find_dropin_paths(u
, &t
);
2959 loaded_cnt
= strv_length(t
);
2960 current_cnt
= strv_length(u
->dropin_paths
);
2962 if (loaded_cnt
== current_cnt
) {
2963 if (loaded_cnt
== 0)
2966 if (strv_overlap(u
->dropin_paths
, t
)) {
2967 STRV_FOREACH(path
, u
->dropin_paths
)
2968 if (fragment_mtime_changed(*path
, u
->dropin_mtime
))
2978 void unit_reset_failed(Unit
*u
) {
2981 if (UNIT_VTABLE(u
)->reset_failed
)
2982 UNIT_VTABLE(u
)->reset_failed(u
);
2984 RATELIMIT_RESET(u
->start_limit
);
2985 u
->start_limit_hit
= false;
2988 Unit
*unit_following(Unit
*u
) {
2991 if (UNIT_VTABLE(u
)->following
)
2992 return UNIT_VTABLE(u
)->following(u
);
2997 bool unit_stop_pending(Unit
*u
) {
3000 /* This call does check the current state of the unit. It's
3001 * hence useful to be called from state change calls of the
3002 * unit itself, where the state isn't updated yet. This is
3003 * different from unit_inactive_or_pending() which checks both
3004 * the current state and for a queued job. */
3006 return u
->job
&& u
->job
->type
== JOB_STOP
;
3009 bool unit_inactive_or_pending(Unit
*u
) {
3012 /* Returns true if the unit is inactive or going down */
3014 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)))
3017 if (unit_stop_pending(u
))
3023 bool unit_active_or_pending(Unit
*u
) {
3026 /* Returns true if the unit is active or going up */
3028 if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
3032 (u
->job
->type
== JOB_START
||
3033 u
->job
->type
== JOB_RELOAD_OR_START
||
3034 u
->job
->type
== JOB_RESTART
))
3040 int unit_kill(Unit
*u
, KillWho w
, int signo
, sd_bus_error
*error
) {
3042 assert(w
>= 0 && w
< _KILL_WHO_MAX
);
3044 assert(signo
< _NSIG
);
3046 if (!UNIT_VTABLE(u
)->kill
)
3049 return UNIT_VTABLE(u
)->kill(u
, w
, signo
, error
);
3052 static Set
*unit_pid_set(pid_t main_pid
, pid_t control_pid
) {
3056 pid_set
= set_new(NULL
);
3060 /* Exclude the main/control pids from being killed via the cgroup */
3062 r
= set_put(pid_set
, PID_TO_PTR(main_pid
));
3067 if (control_pid
> 0) {
3068 r
= set_put(pid_set
, PID_TO_PTR(control_pid
));
3080 int unit_kill_common(
3086 sd_bus_error
*error
) {
3089 bool killed
= false;
3091 if (IN_SET(who
, KILL_MAIN
, KILL_MAIN_FAIL
)) {
3093 return sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no main processes", unit_type_to_string(u
->type
));
3094 else if (main_pid
== 0)
3095 return sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No main process to kill");
3098 if (IN_SET(who
, KILL_CONTROL
, KILL_CONTROL_FAIL
)) {
3099 if (control_pid
< 0)
3100 return sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no control processes", unit_type_to_string(u
->type
));
3101 else if (control_pid
== 0)
3102 return sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No control process to kill");
3105 if (IN_SET(who
, KILL_CONTROL
, KILL_CONTROL_FAIL
, KILL_ALL
, KILL_ALL_FAIL
))
3106 if (control_pid
> 0) {
3107 if (kill(control_pid
, signo
) < 0)
3113 if (IN_SET(who
, KILL_MAIN
, KILL_MAIN_FAIL
, KILL_ALL
, KILL_ALL_FAIL
))
3115 if (kill(main_pid
, signo
) < 0)
3121 if (IN_SET(who
, KILL_ALL
, KILL_ALL_FAIL
) && u
->cgroup_path
) {
3122 _cleanup_set_free_ Set
*pid_set
= NULL
;
3125 /* Exclude the main/control pids from being killed via the cgroup */
3126 pid_set
= unit_pid_set(main_pid
, control_pid
);
3130 q
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, signo
, false, false, false, pid_set
);
3131 if (q
< 0 && q
!= -EAGAIN
&& q
!= -ESRCH
&& q
!= -ENOENT
)
3137 if (r
== 0 && !killed
&& IN_SET(who
, KILL_ALL_FAIL
, KILL_CONTROL_FAIL
))
3143 int unit_following_set(Unit
*u
, Set
**s
) {
3147 if (UNIT_VTABLE(u
)->following_set
)
3148 return UNIT_VTABLE(u
)->following_set(u
, s
);
3154 UnitFileState
unit_get_unit_file_state(Unit
*u
) {
3159 if (u
->unit_file_state
< 0 && u
->fragment_path
) {
3160 r
= unit_file_get_state(
3161 u
->manager
->running_as
== MANAGER_SYSTEM
? UNIT_FILE_SYSTEM
: UNIT_FILE_USER
,
3163 basename(u
->fragment_path
),
3164 &u
->unit_file_state
);
3166 u
->unit_file_state
= UNIT_FILE_BAD
;
3169 return u
->unit_file_state
;
3172 int unit_get_unit_file_preset(Unit
*u
) {
3175 if (u
->unit_file_preset
< 0 && u
->fragment_path
)
3176 u
->unit_file_preset
= unit_file_query_preset(
3177 u
->manager
->running_as
== MANAGER_SYSTEM
? UNIT_FILE_SYSTEM
: UNIT_FILE_USER
,
3179 basename(u
->fragment_path
));
3181 return u
->unit_file_preset
;
3184 Unit
* unit_ref_set(UnitRef
*ref
, Unit
*u
) {
3189 unit_ref_unset(ref
);
3192 LIST_PREPEND(refs
, u
->refs
, ref
);
3196 void unit_ref_unset(UnitRef
*ref
) {
3202 LIST_REMOVE(refs
, ref
->unit
->refs
, ref
);
3206 int unit_patch_contexts(Unit
*u
) {
3214 /* Patch in the manager defaults into the exec and cgroup
3215 * contexts, _after_ the rest of the settings have been
3218 ec
= unit_get_exec_context(u
);
3220 /* This only copies in the ones that need memory */
3221 for (i
= 0; i
< _RLIMIT_MAX
; i
++)
3222 if (u
->manager
->rlimit
[i
] && !ec
->rlimit
[i
]) {
3223 ec
->rlimit
[i
] = newdup(struct rlimit
, u
->manager
->rlimit
[i
], 1);
3228 if (u
->manager
->running_as
== MANAGER_USER
&&
3229 !ec
->working_directory
) {
3231 r
= get_home_dir(&ec
->working_directory
);
3235 /* Allow user services to run, even if the
3236 * home directory is missing */
3237 ec
->working_directory_missing_ok
= true;
3240 if (u
->manager
->running_as
== MANAGER_USER
&&
3241 (ec
->syscall_whitelist
||
3242 !set_isempty(ec
->syscall_filter
) ||
3243 !set_isempty(ec
->syscall_archs
) ||
3244 ec
->address_families_whitelist
||
3245 !set_isempty(ec
->address_families
)))
3246 ec
->no_new_privileges
= true;
3248 if (ec
->private_devices
)
3249 ec
->capability_bounding_set
&= ~(UINT64_C(1) << CAP_MKNOD
);
3252 cc
= unit_get_cgroup_context(u
);
3256 ec
->private_devices
&&
3257 cc
->device_policy
== CGROUP_AUTO
)
3258 cc
->device_policy
= CGROUP_CLOSED
;
3264 ExecContext
*unit_get_exec_context(Unit
*u
) {
3271 offset
= UNIT_VTABLE(u
)->exec_context_offset
;
3275 return (ExecContext
*) ((uint8_t*) u
+ offset
);
3278 KillContext
*unit_get_kill_context(Unit
*u
) {
3285 offset
= UNIT_VTABLE(u
)->kill_context_offset
;
3289 return (KillContext
*) ((uint8_t*) u
+ offset
);
3292 CGroupContext
*unit_get_cgroup_context(Unit
*u
) {
3298 offset
= UNIT_VTABLE(u
)->cgroup_context_offset
;
3302 return (CGroupContext
*) ((uint8_t*) u
+ offset
);
3305 ExecRuntime
*unit_get_exec_runtime(Unit
*u
) {
3311 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
3315 return *(ExecRuntime
**) ((uint8_t*) u
+ offset
);
3318 static int unit_drop_in_dir(Unit
*u
, UnitSetPropertiesMode mode
, bool transient
, char **dir
) {
3321 if (u
->manager
->running_as
== MANAGER_USER
) {
3324 if (mode
== UNIT_PERSISTENT
&& !transient
)
3325 r
= user_config_home(dir
);
3327 r
= user_runtime_dir(dir
);
3334 if (mode
== UNIT_PERSISTENT
&& !transient
)
3335 *dir
= strdup("/etc/systemd/system");
3337 *dir
= strdup("/run/systemd/system");
3344 int unit_write_drop_in(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *data
) {
3346 _cleanup_free_
char *dir
= NULL
, *p
= NULL
, *q
= NULL
;
3351 if (!IN_SET(mode
, UNIT_PERSISTENT
, UNIT_RUNTIME
))
3354 r
= unit_drop_in_dir(u
, mode
, u
->transient
, &dir
);
3358 r
= write_drop_in(dir
, u
->id
, 50, name
, data
);
3362 r
= drop_in_file(dir
, u
->id
, 50, name
, &p
, &q
);
3366 r
= strv_extend(&u
->dropin_paths
, q
);
3370 strv_sort(u
->dropin_paths
);
3371 strv_uniq(u
->dropin_paths
);
3373 u
->dropin_mtime
= now(CLOCK_REALTIME
);
3378 int unit_write_drop_in_format(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *format
, ...) {
3379 _cleanup_free_
char *p
= NULL
;
3387 if (!IN_SET(mode
, UNIT_PERSISTENT
, UNIT_RUNTIME
))
3390 va_start(ap
, format
);
3391 r
= vasprintf(&p
, format
, ap
);
3397 return unit_write_drop_in(u
, mode
, name
, p
);
3400 int unit_write_drop_in_private(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *data
) {
3401 _cleanup_free_
char *ndata
= NULL
;
3407 if (!UNIT_VTABLE(u
)->private_section
)
3410 if (!IN_SET(mode
, UNIT_PERSISTENT
, UNIT_RUNTIME
))
3413 ndata
= strjoin("[", UNIT_VTABLE(u
)->private_section
, "]\n", data
, NULL
);
3417 return unit_write_drop_in(u
, mode
, name
, ndata
);
3420 int unit_write_drop_in_private_format(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *format
, ...) {
3421 _cleanup_free_
char *p
= NULL
;
3429 if (!IN_SET(mode
, UNIT_PERSISTENT
, UNIT_RUNTIME
))
3432 va_start(ap
, format
);
3433 r
= vasprintf(&p
, format
, ap
);
3439 return unit_write_drop_in_private(u
, mode
, name
, p
);
3442 int unit_make_transient(Unit
*u
) {
3445 if (!UNIT_VTABLE(u
)->can_transient
)
3448 u
->load_state
= UNIT_STUB
;
3450 u
->transient
= true;
3452 u
->fragment_path
= mfree(u
->fragment_path
);
3453 u
->source_path
= mfree(u
->source_path
);
3454 u
->dropin_paths
= strv_free(u
->dropin_paths
);
3455 u
->fragment_mtime
= u
->source_mtime
= u
->dropin_mtime
= 0;
3457 unit_add_to_dbus_queue(u
);
3458 unit_add_to_gc_queue(u
);
3459 unit_add_to_load_queue(u
);
3464 int unit_kill_context(
3470 bool main_pid_alien
) {
3472 bool wait_for_exit
= false;
3478 if (c
->kill_mode
== KILL_NONE
)
3488 case KILL_TERMINATE
:
3489 sig
= c
->kill_signal
;
3492 assert_not_reached("KillOperation unknown");
3496 r
= kill_and_sigcont(main_pid
, sig
);
3498 if (r
< 0 && r
!= -ESRCH
) {
3499 _cleanup_free_
char *comm
= NULL
;
3500 get_process_comm(main_pid
, &comm
);
3502 log_unit_warning_errno(u
, r
, "Failed to kill main process " PID_FMT
" (%s), ignoring: %m", main_pid
, strna(comm
));
3504 if (!main_pid_alien
)
3505 wait_for_exit
= true;
3507 if (c
->send_sighup
&& k
== KILL_TERMINATE
)
3508 (void) kill(main_pid
, SIGHUP
);
3512 if (control_pid
> 0) {
3513 r
= kill_and_sigcont(control_pid
, sig
);
3515 if (r
< 0 && r
!= -ESRCH
) {
3516 _cleanup_free_
char *comm
= NULL
;
3517 get_process_comm(control_pid
, &comm
);
3519 log_unit_warning_errno(u
, r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m", control_pid
, strna(comm
));
3521 wait_for_exit
= true;
3523 if (c
->send_sighup
&& k
== KILL_TERMINATE
)
3524 (void) kill(control_pid
, SIGHUP
);
3528 if (u
->cgroup_path
&&
3529 (c
->kill_mode
== KILL_CONTROL_GROUP
|| (c
->kill_mode
== KILL_MIXED
&& k
== KILL_KILL
))) {
3530 _cleanup_set_free_ Set
*pid_set
= NULL
;
3532 /* Exclude the main/control pids from being killed via the cgroup */
3533 pid_set
= unit_pid_set(main_pid
, control_pid
);
3537 r
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, sig
, true, k
!= KILL_TERMINATE
, false, pid_set
);
3539 if (r
!= -EAGAIN
&& r
!= -ESRCH
&& r
!= -ENOENT
)
3540 log_unit_warning_errno(u
, r
, "Failed to kill control group %s, ignoring: %m", u
->cgroup_path
);
3544 /* FIXME: For now, on the legacy hierarchy, we
3545 * will not wait for the cgroup members to die
3546 * if we are running in a container or if this
3547 * is a delegation unit, simply because cgroup
3548 * notification is unreliable in these
3549 * cases. It doesn't work at all in
3550 * containers, and outside of containers it
3551 * can be confused easily by left-over
3552 * directories in the cgroup -- which however
3553 * should not exist in non-delegated units. On
3554 * the unified hierarchy that's different,
3555 * there we get proper events. Hence rely on
3558 if (cg_unified() > 0 ||
3559 (detect_container() == 0 && !unit_cgroup_delegate(u
)))
3560 wait_for_exit
= true;
3562 if (c
->send_sighup
&& k
!= KILL_KILL
) {
3565 pid_set
= unit_pid_set(main_pid
, control_pid
);
3569 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, SIGHUP
, false, true, false, pid_set
);
3574 return wait_for_exit
;
3577 int unit_require_mounts_for(Unit
*u
, const char *path
) {
3578 char prefix
[strlen(path
) + 1], *p
;
3584 /* Registers a unit for requiring a certain path and all its
3585 * prefixes. We keep a simple array of these paths in the
3586 * unit, since its usually short. However, we build a prefix
3587 * table for all possible prefixes so that new appearing mount
3588 * units can easily determine which units to make themselves a
3591 if (!path_is_absolute(path
))
3598 path_kill_slashes(p
);
3600 if (!path_is_safe(p
)) {
3605 if (strv_contains(u
->requires_mounts_for
, p
)) {
3610 r
= strv_consume(&u
->requires_mounts_for
, p
);
3614 PATH_FOREACH_PREFIX_MORE(prefix
, p
) {
3617 x
= hashmap_get(u
->manager
->units_requiring_mounts_for
, prefix
);
3621 r
= hashmap_ensure_allocated(&u
->manager
->units_requiring_mounts_for
, &string_hash_ops
);
3635 r
= hashmap_put(u
->manager
->units_requiring_mounts_for
, q
, x
);
3651 int unit_setup_exec_runtime(Unit
*u
) {
3657 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
3660 /* Check if there already is an ExecRuntime for this unit? */
3661 rt
= (ExecRuntime
**) ((uint8_t*) u
+ offset
);
3665 /* Try to get it from somebody else */
3666 SET_FOREACH(other
, u
->dependencies
[UNIT_JOINS_NAMESPACE_OF
], i
) {
3668 *rt
= unit_get_exec_runtime(other
);
3670 exec_runtime_ref(*rt
);
3675 return exec_runtime_make(rt
, unit_get_exec_context(u
), u
->id
);
3678 bool unit_type_supported(UnitType t
) {
3679 if (_unlikely_(t
< 0))
3681 if (_unlikely_(t
>= _UNIT_TYPE_MAX
))
3684 if (!unit_vtable
[t
]->supported
)
3687 return unit_vtable
[t
]->supported();
3690 void unit_warn_if_dir_nonempty(Unit
*u
, const char* where
) {
3696 r
= dir_is_empty(where
);
3700 log_unit_warning_errno(u
, r
, "Failed to check directory %s: %m", where
);
3704 log_struct(LOG_NOTICE
,
3705 LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING
),
3707 LOG_UNIT_MESSAGE(u
, "Directory %s to mount over is not empty, mounting anyway.", where
),
3712 int unit_fail_if_symlink(Unit
*u
, const char* where
) {
3718 r
= is_symlink(where
);
3720 log_unit_debug_errno(u
, r
, "Failed to check symlink %s, ignoring: %m", where
);
3727 LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING
),
3729 LOG_UNIT_MESSAGE(u
, "Mount on symlink %s not allowed.", where
),
3736 bool unit_is_pristine(Unit
*u
) {
3739 /* Check if the unit already exists or is already around,
3740 * in a number of different ways. Note that to cater for unit
3741 * types such as slice, we are generally fine with units that
3742 * are marked UNIT_LOADED even even though nothing was
3743 * actually loaded, as those unit types don't require a file
3744 * on disk to validly load. */
3746 return !(!IN_SET(u
->load_state
, UNIT_NOT_FOUND
, UNIT_LOADED
) ||
3749 !strv_isempty(u
->dropin_paths
) ||