1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/epoll.h>
26 #include <sys/timerfd.h>
33 #include "sd-messages.h"
38 #include "path-util.h"
39 #include "load-fragment.h"
40 #include "load-dropin.h"
42 #include "unit-name.h"
43 #include "dbus-unit.h"
45 #include "cgroup-util.h"
49 #include "fileio-label.h"
50 #include "bus-errors.h"
55 const UnitVTable
* const unit_vtable
[_UNIT_TYPE_MAX
] = {
56 [UNIT_SERVICE
] = &service_vtable
,
57 [UNIT_SOCKET
] = &socket_vtable
,
58 [UNIT_BUSNAME
] = &busname_vtable
,
59 [UNIT_TARGET
] = &target_vtable
,
60 [UNIT_SNAPSHOT
] = &snapshot_vtable
,
61 [UNIT_DEVICE
] = &device_vtable
,
62 [UNIT_MOUNT
] = &mount_vtable
,
63 [UNIT_AUTOMOUNT
] = &automount_vtable
,
64 [UNIT_SWAP
] = &swap_vtable
,
65 [UNIT_TIMER
] = &timer_vtable
,
66 [UNIT_PATH
] = &path_vtable
,
67 [UNIT_SLICE
] = &slice_vtable
,
68 [UNIT_SCOPE
] = &scope_vtable
71 Unit
*unit_new(Manager
*m
, size_t size
) {
75 assert(size
>= sizeof(Unit
));
81 u
->names
= set_new(string_hash_func
, string_compare_func
);
88 u
->type
= _UNIT_TYPE_INVALID
;
89 u
->deserialized_job
= _JOB_TYPE_INVALID
;
90 u
->default_dependencies
= true;
91 u
->unit_file_state
= _UNIT_FILE_STATE_INVALID
;
92 u
->on_failure_job_mode
= JOB_REPLACE
;
97 bool unit_has_name(Unit
*u
, const char *name
) {
101 return !!set_get(u
->names
, (char*) name
);
104 int unit_add_name(Unit
*u
, const char *text
) {
112 if (unit_name_is_template(text
)) {
116 s
= unit_name_replace_instance(text
, u
->instance
);
123 if (!unit_name_is_valid(s
, TEMPLATE_INVALID
)) {
128 assert_se((t
= unit_name_to_type(s
)) >= 0);
130 if (u
->type
!= _UNIT_TYPE_INVALID
&& t
!= u
->type
) {
135 r
= unit_name_to_instance(s
, &i
);
139 if (i
&& unit_vtable
[t
]->no_instances
) {
144 /* Ensure that this unit is either instanced or not instanced,
146 if (u
->type
!= _UNIT_TYPE_INVALID
&& !u
->instance
!= !i
) {
151 if (unit_vtable
[t
]->no_alias
&&
152 !set_isempty(u
->names
) &&
153 !set_get(u
->names
, s
)) {
158 if (hashmap_size(u
->manager
->units
) >= MANAGER_MAX_NAMES
) {
163 r
= set_put(u
->names
, s
);
170 r
= hashmap_put(u
->manager
->units
, s
, u
);
172 set_remove(u
->names
, s
);
176 if (u
->type
== _UNIT_TYPE_INVALID
) {
182 LIST_PREPEND(units_by_type
, u
->manager
->units_by_type
[t
], u
);
184 if (UNIT_VTABLE(u
)->init
)
185 UNIT_VTABLE(u
)->init(u
);
189 unit_add_to_dbus_queue(u
);
199 int unit_choose_id(Unit
*u
, const char *name
) {
201 _cleanup_free_
char *t
= NULL
;
207 if (unit_name_is_template(name
)) {
212 t
= unit_name_replace_instance(name
, u
->instance
);
219 /* Selects one of the names of this unit as the id */
220 s
= set_get(u
->names
, (char*) name
);
225 r
= unit_name_to_instance(s
, &i
);
234 unit_add_to_dbus_queue(u
);
239 int unit_set_description(Unit
*u
, const char *description
) {
244 if (isempty(description
))
247 s
= strdup(description
);
252 free(u
->description
);
255 unit_add_to_dbus_queue(u
);
259 bool unit_check_gc(Unit
*u
) {
262 if (u
->load_state
== UNIT_STUB
)
265 if (UNIT_VTABLE(u
)->no_gc
)
277 if (unit_active_state(u
) != UNIT_INACTIVE
)
283 if (UNIT_VTABLE(u
)->check_gc
)
284 if (UNIT_VTABLE(u
)->check_gc(u
))
290 void unit_add_to_load_queue(Unit
*u
) {
292 assert(u
->type
!= _UNIT_TYPE_INVALID
);
294 if (u
->load_state
!= UNIT_STUB
|| u
->in_load_queue
)
297 LIST_PREPEND(load_queue
, u
->manager
->load_queue
, u
);
298 u
->in_load_queue
= true;
301 void unit_add_to_cleanup_queue(Unit
*u
) {
304 if (u
->in_cleanup_queue
)
307 LIST_PREPEND(cleanup_queue
, u
->manager
->cleanup_queue
, u
);
308 u
->in_cleanup_queue
= true;
311 void unit_add_to_gc_queue(Unit
*u
) {
314 if (u
->in_gc_queue
|| u
->in_cleanup_queue
)
317 if (unit_check_gc(u
))
320 LIST_PREPEND(gc_queue
, u
->manager
->gc_queue
, u
);
321 u
->in_gc_queue
= true;
323 u
->manager
->n_in_gc_queue
++;
326 void unit_add_to_dbus_queue(Unit
*u
) {
328 assert(u
->type
!= _UNIT_TYPE_INVALID
);
330 if (u
->load_state
== UNIT_STUB
|| u
->in_dbus_queue
)
333 /* Shortcut things if nobody cares */
334 if (set_isempty(u
->manager
->subscribed
)) {
335 u
->sent_dbus_new_signal
= true;
339 LIST_PREPEND(dbus_queue
, u
->manager
->dbus_unit_queue
, u
);
340 u
->in_dbus_queue
= true;
343 static void bidi_set_free(Unit
*u
, Set
*s
) {
349 /* Frees the set and makes sure we are dropped from the
350 * inverse pointers */
352 SET_FOREACH(other
, s
, i
) {
355 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
356 set_remove(other
->dependencies
[d
], u
);
358 unit_add_to_gc_queue(other
);
364 static void unit_remove_transient(Unit
*u
) {
372 if (u
->fragment_path
)
373 unlink(u
->fragment_path
);
375 STRV_FOREACH(i
, u
->dropin_paths
) {
376 _cleanup_free_
char *p
= NULL
;
381 r
= path_get_parent(*i
, &p
);
387 static void unit_free_requires_mounts_for(Unit
*u
) {
390 STRV_FOREACH(j
, u
->requires_mounts_for
) {
391 char s
[strlen(*j
) + 1];
393 PATH_FOREACH_PREFIX_MORE(s
, *j
) {
397 x
= hashmap_get2(u
->manager
->units_requiring_mounts_for
, s
, (void**) &y
);
403 if (set_isempty(x
)) {
404 hashmap_remove(u
->manager
->units_requiring_mounts_for
, y
);
411 strv_free(u
->requires_mounts_for
);
412 u
->requires_mounts_for
= NULL
;
415 void unit_free(Unit
*u
) {
422 if (u
->manager
->n_reloading
<= 0)
423 unit_remove_transient(u
);
425 bus_unit_send_removed_signal(u
);
427 if (u
->load_state
!= UNIT_STUB
)
428 if (UNIT_VTABLE(u
)->done
)
429 UNIT_VTABLE(u
)->done(u
);
431 unit_free_requires_mounts_for(u
);
433 SET_FOREACH(t
, u
->names
, i
)
434 hashmap_remove_value(u
->manager
->units
, t
, u
);
448 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
449 bidi_set_free(u
, u
->dependencies
[d
]);
451 if (u
->type
!= _UNIT_TYPE_INVALID
)
452 LIST_REMOVE(units_by_type
, u
->manager
->units_by_type
[u
->type
], u
);
454 if (u
->in_load_queue
)
455 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
457 if (u
->in_dbus_queue
)
458 LIST_REMOVE(dbus_queue
, u
->manager
->dbus_unit_queue
, u
);
460 if (u
->in_cleanup_queue
)
461 LIST_REMOVE(cleanup_queue
, u
->manager
->cleanup_queue
, u
);
463 if (u
->in_gc_queue
) {
464 LIST_REMOVE(gc_queue
, u
->manager
->gc_queue
, u
);
465 u
->manager
->n_in_gc_queue
--;
468 if (u
->in_cgroup_queue
)
469 LIST_REMOVE(cgroup_queue
, u
->manager
->cgroup_queue
, u
);
471 if (u
->cgroup_path
) {
472 hashmap_remove(u
->manager
->cgroup_unit
, u
->cgroup_path
);
473 free(u
->cgroup_path
);
476 free(u
->description
);
477 strv_free(u
->documentation
);
478 free(u
->fragment_path
);
479 free(u
->source_path
);
480 strv_free(u
->dropin_paths
);
483 set_free_free(u
->names
);
485 unit_unwatch_all_pids(u
);
487 condition_free_list(u
->conditions
);
489 unit_ref_unset(&u
->slice
);
492 unit_ref_unset(u
->refs
);
497 UnitActiveState
unit_active_state(Unit
*u
) {
500 if (u
->load_state
== UNIT_MERGED
)
501 return unit_active_state(unit_follow_merge(u
));
503 /* After a reload it might happen that a unit is not correctly
504 * loaded but still has a process around. That's why we won't
505 * shortcut failed loading to UNIT_INACTIVE_FAILED. */
507 return UNIT_VTABLE(u
)->active_state(u
);
510 const char* unit_sub_state_to_string(Unit
*u
) {
513 return UNIT_VTABLE(u
)->sub_state_to_string(u
);
516 static void complete_move(Set
**s
, Set
**other
) {
524 set_move(*s
, *other
);
531 static void merge_names(Unit
*u
, Unit
*other
) {
538 complete_move(&u
->names
, &other
->names
);
540 set_free_free(other
->names
);
544 SET_FOREACH(t
, u
->names
, i
)
545 assert_se(hashmap_replace(u
->manager
->units
, t
, u
) == 0);
548 static void merge_dependencies(Unit
*u
, Unit
*other
, UnitDependency d
) {
555 assert(d
< _UNIT_DEPENDENCY_MAX
);
557 /* Fix backwards pointers */
558 SET_FOREACH(back
, other
->dependencies
[d
], i
) {
561 for (k
= 0; k
< _UNIT_DEPENDENCY_MAX
; k
++) {
562 r
= set_remove_and_put(back
->dependencies
[k
], other
, u
);
564 set_remove(back
->dependencies
[k
], other
);
566 assert(r
>= 0 || r
== -ENOENT
);
570 complete_move(&u
->dependencies
[d
], &other
->dependencies
[d
]);
572 set_free(other
->dependencies
[d
]);
573 other
->dependencies
[d
] = NULL
;
576 int unit_merge(Unit
*u
, Unit
*other
) {
581 assert(u
->manager
== other
->manager
);
582 assert(u
->type
!= _UNIT_TYPE_INVALID
);
584 other
= unit_follow_merge(other
);
589 if (u
->type
!= other
->type
)
592 if (!u
->instance
!= !other
->instance
)
595 if (other
->load_state
!= UNIT_STUB
&&
596 other
->load_state
!= UNIT_NOT_FOUND
)
605 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
609 merge_names(u
, other
);
611 /* Redirect all references */
613 unit_ref_set(other
->refs
, u
);
615 /* Merge dependencies */
616 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
617 merge_dependencies(u
, other
, d
);
619 other
->load_state
= UNIT_MERGED
;
620 other
->merged_into
= u
;
622 /* If there is still some data attached to the other node, we
623 * don't need it anymore, and can free it. */
624 if (other
->load_state
!= UNIT_STUB
)
625 if (UNIT_VTABLE(other
)->done
)
626 UNIT_VTABLE(other
)->done(other
);
628 unit_add_to_dbus_queue(u
);
629 unit_add_to_cleanup_queue(other
);
634 int unit_merge_by_name(Unit
*u
, const char *name
) {
637 _cleanup_free_
char *s
= NULL
;
642 if (unit_name_is_template(name
)) {
646 s
= unit_name_replace_instance(name
, u
->instance
);
653 other
= manager_get_unit(u
->manager
, name
);
655 r
= unit_add_name(u
, name
);
657 r
= unit_merge(u
, other
);
662 Unit
* unit_follow_merge(Unit
*u
) {
665 while (u
->load_state
== UNIT_MERGED
)
666 assert_se(u
= u
->merged_into
);
671 int unit_add_exec_dependencies(Unit
*u
, ExecContext
*c
) {
677 if (c
->working_directory
) {
678 r
= unit_require_mounts_for(u
, c
->working_directory
);
683 if (c
->root_directory
) {
684 r
= unit_require_mounts_for(u
, c
->root_directory
);
689 if (c
->std_output
!= EXEC_OUTPUT_KMSG
&&
690 c
->std_output
!= EXEC_OUTPUT_SYSLOG
&&
691 c
->std_output
!= EXEC_OUTPUT_JOURNAL
&&
692 c
->std_output
!= EXEC_OUTPUT_KMSG_AND_CONSOLE
&&
693 c
->std_output
!= EXEC_OUTPUT_SYSLOG_AND_CONSOLE
&&
694 c
->std_output
!= EXEC_OUTPUT_JOURNAL_AND_CONSOLE
&&
695 c
->std_error
!= EXEC_OUTPUT_KMSG
&&
696 c
->std_error
!= EXEC_OUTPUT_SYSLOG
&&
697 c
->std_error
!= EXEC_OUTPUT_JOURNAL
&&
698 c
->std_error
!= EXEC_OUTPUT_KMSG_AND_CONSOLE
&&
699 c
->std_error
!= EXEC_OUTPUT_JOURNAL_AND_CONSOLE
&&
700 c
->std_error
!= EXEC_OUTPUT_SYSLOG_AND_CONSOLE
)
703 /* If syslog or kernel logging is requested, make sure our own
704 * logging daemon is run first. */
706 if (u
->manager
->running_as
== SYSTEMD_SYSTEM
) {
707 r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_JOURNALD_SOCKET
, NULL
, true);
715 const char *unit_description(Unit
*u
) {
719 return u
->description
;
724 void unit_dump(Unit
*u
, FILE *f
, const char *prefix
) {
728 _cleanup_free_
char *p2
= NULL
;
731 timestamp1
[FORMAT_TIMESTAMP_MAX
],
732 timestamp2
[FORMAT_TIMESTAMP_MAX
],
733 timestamp3
[FORMAT_TIMESTAMP_MAX
],
734 timestamp4
[FORMAT_TIMESTAMP_MAX
],
735 timespan
[FORMAT_TIMESPAN_MAX
];
737 _cleanup_set_free_ Set
*following_set
= NULL
;
741 assert(u
->type
>= 0);
745 p2
= strappend(prefix
, "\t");
746 prefix2
= p2
? p2
: prefix
;
750 "%s\tDescription: %s\n"
752 "%s\tUnit Load State: %s\n"
753 "%s\tUnit Active State: %s\n"
754 "%s\tInactive Exit Timestamp: %s\n"
755 "%s\tActive Enter Timestamp: %s\n"
756 "%s\tActive Exit Timestamp: %s\n"
757 "%s\tInactive Enter Timestamp: %s\n"
758 "%s\tGC Check Good: %s\n"
759 "%s\tNeed Daemon Reload: %s\n"
760 "%s\tTransient: %s\n"
763 "%s\tCGroup realized: %s\n"
764 "%s\tCGroup mask: 0x%x\n"
765 "%s\tCGroup members mask: 0x%x\n",
767 prefix
, unit_description(u
),
768 prefix
, strna(u
->instance
),
769 prefix
, unit_load_state_to_string(u
->load_state
),
770 prefix
, unit_active_state_to_string(unit_active_state(u
)),
771 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->inactive_exit_timestamp
.realtime
)),
772 prefix
, strna(format_timestamp(timestamp2
, sizeof(timestamp2
), u
->active_enter_timestamp
.realtime
)),
773 prefix
, strna(format_timestamp(timestamp3
, sizeof(timestamp3
), u
->active_exit_timestamp
.realtime
)),
774 prefix
, strna(format_timestamp(timestamp4
, sizeof(timestamp4
), u
->inactive_enter_timestamp
.realtime
)),
775 prefix
, yes_no(unit_check_gc(u
)),
776 prefix
, yes_no(unit_need_daemon_reload(u
)),
777 prefix
, yes_no(u
->transient
),
778 prefix
, strna(unit_slice_name(u
)),
779 prefix
, strna(u
->cgroup_path
),
780 prefix
, yes_no(u
->cgroup_realized
),
781 prefix
, u
->cgroup_mask
,
782 prefix
, u
->cgroup_members_mask
);
784 SET_FOREACH(t
, u
->names
, i
)
785 fprintf(f
, "%s\tName: %s\n", prefix
, t
);
787 STRV_FOREACH(j
, u
->documentation
)
788 fprintf(f
, "%s\tDocumentation: %s\n", prefix
, *j
);
790 following
= unit_following(u
);
792 fprintf(f
, "%s\tFollowing: %s\n", prefix
, following
->id
);
794 r
= unit_following_set(u
, &following_set
);
798 SET_FOREACH(other
, following_set
, i
)
799 fprintf(f
, "%s\tFollowing Set Member: %s\n", prefix
, other
->id
);
802 if (u
->fragment_path
)
803 fprintf(f
, "%s\tFragment Path: %s\n", prefix
, u
->fragment_path
);
806 fprintf(f
, "%s\tSource Path: %s\n", prefix
, u
->source_path
);
808 STRV_FOREACH(j
, u
->dropin_paths
)
809 fprintf(f
, "%s\tDropIn Path: %s\n", prefix
, *j
);
811 if (u
->job_timeout
> 0)
812 fprintf(f
, "%s\tJob Timeout: %s\n", prefix
, format_timespan(timespan
, sizeof(timespan
), u
->job_timeout
, 0));
814 condition_dump_list(u
->conditions
, f
, prefix
);
816 if (dual_timestamp_is_set(&u
->condition_timestamp
))
818 "%s\tCondition Timestamp: %s\n"
819 "%s\tCondition Result: %s\n",
820 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->condition_timestamp
.realtime
)),
821 prefix
, yes_no(u
->condition_result
));
823 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
826 SET_FOREACH(other
, u
->dependencies
[d
], i
)
827 fprintf(f
, "%s\t%s: %s\n", prefix
, unit_dependency_to_string(d
), other
->id
);
830 if (!strv_isempty(u
->requires_mounts_for
)) {
832 "%s\tRequiresMountsFor:", prefix
);
834 STRV_FOREACH(j
, u
->requires_mounts_for
)
835 fprintf(f
, " %s", *j
);
840 if (u
->load_state
== UNIT_LOADED
) {
843 "%s\tStopWhenUnneeded: %s\n"
844 "%s\tRefuseManualStart: %s\n"
845 "%s\tRefuseManualStop: %s\n"
846 "%s\tDefaultDependencies: %s\n"
847 "%s\tOnFailureJobMode: %s\n"
848 "%s\tIgnoreOnIsolate: %s\n"
849 "%s\tIgnoreOnSnapshot: %s\n",
850 prefix
, yes_no(u
->stop_when_unneeded
),
851 prefix
, yes_no(u
->refuse_manual_start
),
852 prefix
, yes_no(u
->refuse_manual_stop
),
853 prefix
, yes_no(u
->default_dependencies
),
854 prefix
, job_mode_to_string(u
->on_failure_job_mode
),
855 prefix
, yes_no(u
->ignore_on_isolate
),
856 prefix
, yes_no(u
->ignore_on_snapshot
));
858 if (UNIT_VTABLE(u
)->dump
)
859 UNIT_VTABLE(u
)->dump(u
, f
, prefix2
);
861 } else if (u
->load_state
== UNIT_MERGED
)
863 "%s\tMerged into: %s\n",
864 prefix
, u
->merged_into
->id
);
865 else if (u
->load_state
== UNIT_ERROR
)
866 fprintf(f
, "%s\tLoad Error Code: %s\n", prefix
, strerror(-u
->load_error
));
870 job_dump(u
->job
, f
, prefix2
);
873 job_dump(u
->nop_job
, f
, prefix2
);
877 /* Common implementation for multiple backends */
878 int unit_load_fragment_and_dropin(Unit
*u
) {
883 /* Load a .{service,socket,...} file */
884 r
= unit_load_fragment(u
);
888 if (u
->load_state
== UNIT_STUB
)
891 /* Load drop-in directory data */
892 r
= unit_load_dropin(unit_follow_merge(u
));
899 /* Common implementation for multiple backends */
900 int unit_load_fragment_and_dropin_optional(Unit
*u
) {
905 /* Same as unit_load_fragment_and_dropin(), but whether
906 * something can be loaded or not doesn't matter. */
908 /* Load a .service file */
909 r
= unit_load_fragment(u
);
913 if (u
->load_state
== UNIT_STUB
)
914 u
->load_state
= UNIT_LOADED
;
916 /* Load drop-in directory data */
917 r
= unit_load_dropin(unit_follow_merge(u
));
924 int unit_add_default_target_dependency(Unit
*u
, Unit
*target
) {
928 if (target
->type
!= UNIT_TARGET
)
931 /* Only add the dependency if both units are loaded, so that
932 * that loop check below is reliable */
933 if (u
->load_state
!= UNIT_LOADED
||
934 target
->load_state
!= UNIT_LOADED
)
937 /* If either side wants no automatic dependencies, then let's
939 if (!u
->default_dependencies
||
940 !target
->default_dependencies
)
943 /* Don't create loops */
944 if (set_get(target
->dependencies
[UNIT_BEFORE
], u
))
947 return unit_add_dependency(target
, UNIT_AFTER
, u
, true);
950 static int unit_add_default_dependencies(Unit
*u
) {
952 static const UnitDependency deps
[] = {
954 UNIT_REQUIRED_BY_OVERRIDABLE
,
966 for (k
= 0; k
< ELEMENTSOF(deps
); k
++)
967 SET_FOREACH(target
, u
->dependencies
[deps
[k
]], i
) {
968 r
= unit_add_default_target_dependency(u
, target
);
973 if (u
->default_dependencies
&& unit_get_cgroup_context(u
)) {
974 if (UNIT_ISSET(u
->slice
))
975 r
= unit_add_two_dependencies(u
, UNIT_AFTER
, UNIT_WANTS
, UNIT_DEREF(u
->slice
), true);
977 r
= unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_WANTS
, SPECIAL_ROOT_SLICE
, NULL
, true);
986 static int unit_add_mount_links(Unit
*u
) {
992 STRV_FOREACH(i
, u
->requires_mounts_for
) {
993 char prefix
[strlen(*i
) + 1];
995 PATH_FOREACH_PREFIX_MORE(prefix
, *i
) {
998 r
= manager_get_unit_by_path(u
->manager
, prefix
, ".mount", &m
);
1006 if (m
->load_state
!= UNIT_LOADED
)
1009 r
= unit_add_dependency(u
, UNIT_AFTER
, m
, true);
1013 if (m
->fragment_path
) {
1014 r
= unit_add_dependency(u
, UNIT_REQUIRES
, m
, true);
1024 int unit_load(Unit
*u
) {
1029 if (u
->in_load_queue
) {
1030 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
1031 u
->in_load_queue
= false;
1034 if (u
->type
== _UNIT_TYPE_INVALID
)
1037 if (u
->load_state
!= UNIT_STUB
)
1040 if (UNIT_VTABLE(u
)->load
) {
1041 r
= UNIT_VTABLE(u
)->load(u
);
1046 if (u
->load_state
== UNIT_STUB
) {
1051 if (u
->load_state
== UNIT_LOADED
) {
1053 if (u
->default_dependencies
) {
1054 r
= unit_add_default_dependencies(u
);
1059 unit_update_member_masks(u
);
1061 r
= unit_add_mount_links(u
);
1065 if (u
->on_failure_job_mode
== JOB_ISOLATE
&&
1066 set_size(u
->dependencies
[UNIT_ON_FAILURE
]) > 1) {
1068 log_error_unit(u
->id
,
1069 "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u
->id
);
1076 assert((u
->load_state
!= UNIT_MERGED
) == !u
->merged_into
);
1078 unit_add_to_dbus_queue(unit_follow_merge(u
));
1079 unit_add_to_gc_queue(u
);
1084 u
->load_state
= u
->load_state
== UNIT_STUB
? UNIT_NOT_FOUND
: UNIT_ERROR
;
1086 unit_add_to_dbus_queue(u
);
1087 unit_add_to_gc_queue(u
);
1089 log_debug_unit(u
->id
, "Failed to load configuration for %s: %s",
1090 u
->id
, strerror(-r
));
1095 static bool unit_condition_test(Unit
*u
) {
1098 dual_timestamp_get(&u
->condition_timestamp
);
1099 u
->condition_result
= condition_test_list(u
->id
, u
->conditions
);
1101 return u
->condition_result
;
1104 _pure_
static const char* unit_get_status_message_format(Unit
*u
, JobType t
) {
1105 const UnitStatusMessageFormats
*format_table
;
1109 assert(t
< _JOB_TYPE_MAX
);
1111 if (t
!= JOB_START
&& t
!= JOB_STOP
)
1114 format_table
= &UNIT_VTABLE(u
)->status_message_formats
;
1118 return format_table
->starting_stopping
[t
== JOB_STOP
];
1121 _pure_
static const char *unit_get_status_message_format_try_harder(Unit
*u
, JobType t
) {
1126 assert(t
< _JOB_TYPE_MAX
);
1128 format
= unit_get_status_message_format(u
, t
);
1132 /* Return generic strings */
1134 return "Starting %s.";
1135 else if (t
== JOB_STOP
)
1136 return "Stopping %s.";
1137 else if (t
== JOB_RELOAD
)
1138 return "Reloading %s.";
1143 #pragma GCC diagnostic push
1144 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
1145 static void unit_status_print_starting_stopping(Unit
*u
, JobType t
) {
1150 /* We only print status messages for selected units on
1151 * selected operations. */
1153 format
= unit_get_status_message_format(u
, t
);
1157 unit_status_printf(u
, "", format
);
1159 #pragma GCC diagnostic pop
1161 #pragma GCC diagnostic push
1162 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
1163 static void unit_status_log_starting_stopping_reloading(Unit
*u
, JobType t
) {
1170 if (t
!= JOB_START
&& t
!= JOB_STOP
&& t
!= JOB_RELOAD
)
1173 if (log_on_console())
1176 /* We log status messages for all units and all operations. */
1178 format
= unit_get_status_message_format_try_harder(u
, t
);
1182 snprintf(buf
, sizeof(buf
), format
, unit_description(u
));
1185 mid
= t
== JOB_START
? SD_MESSAGE_UNIT_STARTING
:
1186 t
== JOB_STOP
? SD_MESSAGE_UNIT_STOPPING
:
1187 SD_MESSAGE_UNIT_RELOADING
;
1189 log_struct_unit(LOG_INFO
,
1195 #pragma GCC diagnostic pop
1198 * -EBADR: This unit type does not support starting.
1199 * -EALREADY: Unit is already started.
1200 * -EAGAIN: An operation is already in progress. Retry later.
1201 * -ECANCELED: Too many requests for now.
1203 int unit_start(Unit
*u
) {
1204 UnitActiveState state
;
1209 if (u
->load_state
!= UNIT_LOADED
)
1212 /* If this is already started, then this will succeed. Note
1213 * that this will even succeed if this unit is not startable
1214 * by the user. This is relied on to detect when we need to
1215 * wait for units and when waiting is finished. */
1216 state
= unit_active_state(u
);
1217 if (UNIT_IS_ACTIVE_OR_RELOADING(state
))
1220 /* If the conditions failed, don't do anything at all. If we
1221 * already are activating this call might still be useful to
1222 * speed up activation in case there is some hold-off time,
1223 * but we don't want to recheck the condition in that case. */
1224 if (state
!= UNIT_ACTIVATING
&&
1225 !unit_condition_test(u
)) {
1226 log_debug_unit(u
->id
, "Starting of %s requested but condition failed. Ignoring.", u
->id
);
1230 /* Forward to the main object, if we aren't it. */
1231 following
= unit_following(u
);
1233 log_debug_unit(u
->id
, "Redirecting start request from %s to %s.",
1234 u
->id
, following
->id
);
1235 return unit_start(following
);
1238 unit_status_log_starting_stopping_reloading(u
, JOB_START
);
1239 unit_status_print_starting_stopping(u
, JOB_START
);
1241 /* If it is stopped, but we cannot start it, then fail */
1242 if (!UNIT_VTABLE(u
)->start
)
1245 /* We don't suppress calls to ->start() here when we are
1246 * already starting, to allow this request to be used as a
1247 * "hurry up" call, for example when the unit is in some "auto
1248 * restart" state where it waits for a holdoff timer to elapse
1249 * before it will start again. */
1251 unit_add_to_dbus_queue(u
);
1253 return UNIT_VTABLE(u
)->start(u
);
1256 bool unit_can_start(Unit
*u
) {
1259 return !!UNIT_VTABLE(u
)->start
;
1262 bool unit_can_isolate(Unit
*u
) {
1265 return unit_can_start(u
) &&
1270 * -EBADR: This unit type does not support stopping.
1271 * -EALREADY: Unit is already stopped.
1272 * -EAGAIN: An operation is already in progress. Retry later.
1274 int unit_stop(Unit
*u
) {
1275 UnitActiveState state
;
1280 state
= unit_active_state(u
);
1281 if (UNIT_IS_INACTIVE_OR_FAILED(state
))
1284 if ((following
= unit_following(u
))) {
1285 log_debug_unit(u
->id
, "Redirecting stop request from %s to %s.",
1286 u
->id
, following
->id
);
1287 return unit_stop(following
);
1290 unit_status_log_starting_stopping_reloading(u
, JOB_STOP
);
1291 unit_status_print_starting_stopping(u
, JOB_STOP
);
1293 if (!UNIT_VTABLE(u
)->stop
)
1296 unit_add_to_dbus_queue(u
);
1298 return UNIT_VTABLE(u
)->stop(u
);
1302 * -EBADR: This unit type does not support reloading.
1303 * -ENOEXEC: Unit is not started.
1304 * -EAGAIN: An operation is already in progress. Retry later.
1306 int unit_reload(Unit
*u
) {
1307 UnitActiveState state
;
1312 if (u
->load_state
!= UNIT_LOADED
)
1315 if (!unit_can_reload(u
))
1318 state
= unit_active_state(u
);
1319 if (state
== UNIT_RELOADING
)
1322 if (state
!= UNIT_ACTIVE
) {
1323 log_warning_unit(u
->id
, "Unit %s cannot be reloaded because it is inactive.",
1328 following
= unit_following(u
);
1330 log_debug_unit(u
->id
, "Redirecting reload request from %s to %s.",
1331 u
->id
, following
->id
);
1332 return unit_reload(following
);
1335 unit_status_log_starting_stopping_reloading(u
, JOB_RELOAD
);
1337 unit_add_to_dbus_queue(u
);
1338 return UNIT_VTABLE(u
)->reload(u
);
1341 bool unit_can_reload(Unit
*u
) {
1344 if (!UNIT_VTABLE(u
)->reload
)
1347 if (!UNIT_VTABLE(u
)->can_reload
)
1350 return UNIT_VTABLE(u
)->can_reload(u
);
1353 static void unit_check_unneeded(Unit
*u
) {
1359 /* If this service shall be shut down when unneeded then do
1362 if (!u
->stop_when_unneeded
)
1365 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
1368 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUIRED_BY
], i
)
1369 if (unit_active_or_pending(other
))
1372 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUIRED_BY_OVERRIDABLE
], i
)
1373 if (unit_active_or_pending(other
))
1376 SET_FOREACH(other
, u
->dependencies
[UNIT_WANTED_BY
], i
)
1377 if (unit_active_or_pending(other
))
1380 SET_FOREACH(other
, u
->dependencies
[UNIT_BOUND_BY
], i
)
1381 if (unit_active_or_pending(other
))
1384 log_info_unit(u
->id
, "Service %s is not needed anymore. Stopping.", u
->id
);
1386 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
1387 manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_FAIL
, true, NULL
, NULL
);
1390 static void retroactively_start_dependencies(Unit
*u
) {
1395 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)));
1397 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUIRES
], i
)
1398 if (!set_get(u
->dependencies
[UNIT_AFTER
], other
) &&
1399 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
1400 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, true, NULL
, NULL
);
1402 SET_FOREACH(other
, u
->dependencies
[UNIT_BINDS_TO
], i
)
1403 if (!set_get(u
->dependencies
[UNIT_AFTER
], other
) &&
1404 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
1405 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, true, NULL
, NULL
);
1407 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUIRES_OVERRIDABLE
], i
)
1408 if (!set_get(u
->dependencies
[UNIT_AFTER
], other
) &&
1409 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
1410 manager_add_job(u
->manager
, JOB_START
, other
, JOB_FAIL
, false, NULL
, NULL
);
1412 SET_FOREACH(other
, u
->dependencies
[UNIT_WANTS
], i
)
1413 if (!set_get(u
->dependencies
[UNIT_AFTER
], other
) &&
1414 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
1415 manager_add_job(u
->manager
, JOB_START
, other
, JOB_FAIL
, false, NULL
, NULL
);
1417 SET_FOREACH(other
, u
->dependencies
[UNIT_CONFLICTS
], i
)
1418 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1419 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, true, NULL
, NULL
);
1421 SET_FOREACH(other
, u
->dependencies
[UNIT_CONFLICTED_BY
], i
)
1422 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1423 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, true, NULL
, NULL
);
1426 static void retroactively_stop_dependencies(Unit
*u
) {
1431 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
1433 /* Pull down units which are bound to us recursively if enabled */
1434 SET_FOREACH(other
, u
->dependencies
[UNIT_BOUND_BY
], i
)
1435 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1436 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, true, NULL
, NULL
);
1439 static void check_unneeded_dependencies(Unit
*u
) {
1444 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
1446 /* Garbage collect services that might not be needed anymore, if enabled */
1447 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUIRES
], i
)
1448 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1449 unit_check_unneeded(other
);
1450 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUIRES_OVERRIDABLE
], i
)
1451 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1452 unit_check_unneeded(other
);
1453 SET_FOREACH(other
, u
->dependencies
[UNIT_WANTS
], i
)
1454 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1455 unit_check_unneeded(other
);
1456 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUISITE
], i
)
1457 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1458 unit_check_unneeded(other
);
1459 SET_FOREACH(other
, u
->dependencies
[UNIT_REQUISITE_OVERRIDABLE
], i
)
1460 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1461 unit_check_unneeded(other
);
1462 SET_FOREACH(other
, u
->dependencies
[UNIT_BINDS_TO
], i
)
1463 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
1464 unit_check_unneeded(other
);
1467 void unit_start_on_failure(Unit
*u
) {
1473 if (set_size(u
->dependencies
[UNIT_ON_FAILURE
]) <= 0)
1476 log_info_unit(u
->id
, "Triggering OnFailure= dependencies of %s.", u
->id
);
1478 SET_FOREACH(other
, u
->dependencies
[UNIT_ON_FAILURE
], i
) {
1481 r
= manager_add_job(u
->manager
, JOB_START
, other
, u
->on_failure_job_mode
, true, NULL
, NULL
);
1483 log_error_unit(u
->id
, "Failed to enqueue OnFailure= job: %s", strerror(-r
));
1487 void unit_trigger_notify(Unit
*u
) {
1493 SET_FOREACH(other
, u
->dependencies
[UNIT_TRIGGERED_BY
], i
)
1494 if (UNIT_VTABLE(other
)->trigger_notify
)
1495 UNIT_VTABLE(other
)->trigger_notify(other
, u
);
1498 void unit_notify(Unit
*u
, UnitActiveState os
, UnitActiveState ns
, bool reload_success
) {
1503 assert(os
< _UNIT_ACTIVE_STATE_MAX
);
1504 assert(ns
< _UNIT_ACTIVE_STATE_MAX
);
1506 /* Note that this is called for all low-level state changes,
1507 * even if they might map to the same high-level
1508 * UnitActiveState! That means that ns == os is OK an expected
1509 * behavior here. For example: if a mount point is remounted
1510 * this function will be called too! */
1514 if (m
->n_reloading
<= 0) {
1517 dual_timestamp_get(&ts
);
1519 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && !UNIT_IS_INACTIVE_OR_FAILED(ns
))
1520 u
->inactive_exit_timestamp
= ts
;
1521 else if (!UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_INACTIVE_OR_FAILED(ns
))
1522 u
->inactive_enter_timestamp
= ts
;
1524 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
) && UNIT_IS_ACTIVE_OR_RELOADING(ns
))
1525 u
->active_enter_timestamp
= ts
;
1526 else if (UNIT_IS_ACTIVE_OR_RELOADING(os
) && !UNIT_IS_ACTIVE_OR_RELOADING(ns
))
1527 u
->active_exit_timestamp
= ts
;
1530 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
1531 unit_destroy_cgroup(u
);
1533 /* Note that this doesn't apply to RemainAfterExit services exiting
1534 * sucessfully, since there's no change of state in that case. Which is
1535 * why it is handled in service_set_state() */
1536 if (UNIT_IS_INACTIVE_OR_FAILED(os
) != UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
1539 ec
= unit_get_exec_context(u
);
1540 if (ec
&& exec_context_may_touch_console(ec
)) {
1541 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
1544 if (m
->n_on_console
== 0)
1545 /* unset no_console_output flag, since the console is free */
1546 m
->no_console_output
= false;
1555 if (u
->job
->state
== JOB_WAITING
)
1557 /* So we reached a different state for this
1558 * job. Let's see if we can run it now if it
1559 * failed previously due to EAGAIN. */
1560 job_add_to_run_queue(u
->job
);
1562 /* Let's check whether this state change constitutes a
1563 * finished job, or maybe contradicts a running job and
1564 * hence needs to invalidate jobs. */
1566 switch (u
->job
->type
) {
1569 case JOB_VERIFY_ACTIVE
:
1571 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
))
1572 job_finish_and_invalidate(u
->job
, JOB_DONE
, true);
1573 else if (u
->job
->state
== JOB_RUNNING
&& ns
!= UNIT_ACTIVATING
) {
1576 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
1577 job_finish_and_invalidate(u
->job
, ns
== UNIT_FAILED
? JOB_FAILED
: JOB_DONE
, true);
1583 case JOB_RELOAD_OR_START
:
1585 if (u
->job
->state
== JOB_RUNNING
) {
1586 if (ns
== UNIT_ACTIVE
)
1587 job_finish_and_invalidate(u
->job
, reload_success
? JOB_DONE
: JOB_FAILED
, true);
1588 else if (ns
!= UNIT_ACTIVATING
&& ns
!= UNIT_RELOADING
) {
1591 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
1592 job_finish_and_invalidate(u
->job
, ns
== UNIT_FAILED
? JOB_FAILED
: JOB_DONE
, true);
1600 case JOB_TRY_RESTART
:
1602 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
1603 job_finish_and_invalidate(u
->job
, JOB_DONE
, true);
1604 else if (u
->job
->state
== JOB_RUNNING
&& ns
!= UNIT_DEACTIVATING
) {
1606 job_finish_and_invalidate(u
->job
, JOB_FAILED
, true);
1612 assert_not_reached("Job type unknown");
1618 if (m
->n_reloading
<= 0) {
1620 /* If this state change happened without being
1621 * requested by a job, then let's retroactively start
1622 * or stop dependencies. We skip that step when
1623 * deserializing, since we don't want to create any
1624 * additional jobs just because something is already
1628 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns
))
1629 retroactively_start_dependencies(u
);
1630 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os
) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
1631 retroactively_stop_dependencies(u
);
1634 /* stop unneeded units regardless if going down was expected or not */
1635 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
1636 check_unneeded_dependencies(u
);
1638 if (ns
!= os
&& ns
== UNIT_FAILED
) {
1639 log_notice_unit(u
->id
, "Unit %s entered failed state.", u
->id
);
1640 unit_start_on_failure(u
);
1644 /* Some names are special */
1645 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
)) {
1647 if (unit_has_name(u
, SPECIAL_DBUS_SERVICE
))
1648 /* The bus just might have become available,
1649 * hence try to connect to it, if we aren't
1653 if (u
->type
== UNIT_SERVICE
&&
1654 !UNIT_IS_ACTIVE_OR_RELOADING(os
) &&
1655 m
->n_reloading
<= 0) {
1656 /* Write audit record if we have just finished starting up */
1657 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_START
, true);
1661 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
))
1662 manager_send_unit_plymouth(m
, u
);
1666 /* We don't care about D-Bus here, since we'll get an
1667 * asynchronous notification for it anyway. */
1669 if (u
->type
== UNIT_SERVICE
&&
1670 UNIT_IS_INACTIVE_OR_FAILED(ns
) &&
1671 !UNIT_IS_INACTIVE_OR_FAILED(os
) &&
1672 m
->n_reloading
<= 0) {
1674 /* Hmm, if there was no start record written
1675 * write it now, so that we always have a nice
1678 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_START
, ns
== UNIT_INACTIVE
);
1680 if (ns
== UNIT_INACTIVE
)
1681 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_STOP
, true);
1683 /* Write audit record if we have just finished shutting down */
1684 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_STOP
, ns
== UNIT_INACTIVE
);
1686 u
->in_audit
= false;
1690 manager_recheck_journal(m
);
1691 unit_trigger_notify(u
);
1693 /* Maybe we finished startup and are now ready for being
1694 * stopped because unneeded? */
1695 if (u
->manager
->n_reloading
<= 0)
1696 unit_check_unneeded(u
);
1698 unit_add_to_dbus_queue(u
);
1699 unit_add_to_gc_queue(u
);
1702 int unit_watch_pid(Unit
*u
, pid_t pid
) {
1708 /* Watch a specific PID. We only support one or two units
1709 * watching each PID for now, not more. */
1711 r
= hashmap_ensure_allocated(&u
->manager
->watch_pids1
, trivial_hash_func
, trivial_compare_func
);
1715 r
= set_ensure_allocated(&u
->pids
, trivial_hash_func
, trivial_compare_func
);
1719 r
= hashmap_put(u
->manager
->watch_pids1
, LONG_TO_PTR(pid
), u
);
1721 r
= hashmap_ensure_allocated(&u
->manager
->watch_pids2
, trivial_hash_func
, trivial_compare_func
);
1725 r
= hashmap_put(u
->manager
->watch_pids2
, LONG_TO_PTR(pid
), u
);
1728 q
= set_put(u
->pids
, LONG_TO_PTR(pid
));
1735 void unit_unwatch_pid(Unit
*u
, pid_t pid
) {
1739 hashmap_remove_value(u
->manager
->watch_pids1
, LONG_TO_PTR(pid
), u
);
1740 hashmap_remove_value(u
->manager
->watch_pids2
, LONG_TO_PTR(pid
), u
);
1741 set_remove(u
->pids
, LONG_TO_PTR(pid
));
1744 static int watch_pids_in_path(Unit
*u
, const char *path
) {
1745 _cleanup_closedir_
DIR *d
= NULL
;
1746 _cleanup_fclose_
FILE *f
= NULL
;
1752 /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */
1754 r
= cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER
, path
, &f
);
1758 while ((r
= cg_read_pid(f
, &pid
)) > 0) {
1759 r
= unit_watch_pid(u
, pid
);
1760 if (r
< 0 && ret
>= 0)
1763 if (r
< 0 && ret
>= 0)
1766 } else if (ret
>= 0)
1769 r
= cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER
, path
, &d
);
1773 while ((r
= cg_read_subgroup(d
, &fn
)) > 0) {
1774 _cleanup_free_
char *p
= NULL
;
1776 p
= strjoin(path
, "/", fn
, NULL
);
1782 r
= watch_pids_in_path(u
, p
);
1783 if (r
< 0 && ret
>= 0)
1786 if (r
< 0 && ret
>= 0)
1789 } else if (ret
>= 0)
1796 int unit_watch_all_pids(Unit
*u
) {
1799 if (!u
->cgroup_path
)
1802 /* Adds all PIDs from our cgroup to the set of PIDs we watch */
1804 return watch_pids_in_path(u
, u
->cgroup_path
);
1807 void unit_unwatch_all_pids(Unit
*u
) {
1813 SET_FOREACH(e
, u
->pids
, i
) {
1814 hashmap_remove_value(u
->manager
->watch_pids1
, e
, u
);
1815 hashmap_remove_value(u
->manager
->watch_pids2
, e
, u
);
1822 void unit_tidy_watch_pids(Unit
*u
, pid_t except1
, pid_t except2
) {
1828 /* Cleans dead PIDs from our list */
1830 SET_FOREACH(e
, u
->pids
, i
) {
1831 pid_t pid
= PTR_TO_LONG(e
);
1833 if (pid
== except1
|| pid
== except2
)
1836 if (kill(pid
, 0) < 0 && errno
== ESRCH
)
1837 set_remove(u
->pids
, e
);
1841 bool unit_job_is_applicable(Unit
*u
, JobType j
) {
1843 assert(j
>= 0 && j
< _JOB_TYPE_MAX
);
1847 case JOB_VERIFY_ACTIVE
:
1854 case JOB_TRY_RESTART
:
1855 return unit_can_start(u
);
1858 return unit_can_reload(u
);
1860 case JOB_RELOAD_OR_START
:
1861 return unit_can_reload(u
) && unit_can_start(u
);
1864 assert_not_reached("Invalid job type");
1868 int unit_add_dependency(Unit
*u
, UnitDependency d
, Unit
*other
, bool add_reference
) {
1870 static const UnitDependency inverse_table
[_UNIT_DEPENDENCY_MAX
] = {
1871 [UNIT_REQUIRES
] = UNIT_REQUIRED_BY
,
1872 [UNIT_REQUIRES_OVERRIDABLE
] = UNIT_REQUIRED_BY_OVERRIDABLE
,
1873 [UNIT_WANTS
] = UNIT_WANTED_BY
,
1874 [UNIT_REQUISITE
] = UNIT_REQUIRED_BY
,
1875 [UNIT_REQUISITE_OVERRIDABLE
] = UNIT_REQUIRED_BY_OVERRIDABLE
,
1876 [UNIT_BINDS_TO
] = UNIT_BOUND_BY
,
1877 [UNIT_PART_OF
] = UNIT_CONSISTS_OF
,
1878 [UNIT_REQUIRED_BY
] = _UNIT_DEPENDENCY_INVALID
,
1879 [UNIT_REQUIRED_BY_OVERRIDABLE
] = _UNIT_DEPENDENCY_INVALID
,
1880 [UNIT_WANTED_BY
] = _UNIT_DEPENDENCY_INVALID
,
1881 [UNIT_BOUND_BY
] = UNIT_BINDS_TO
,
1882 [UNIT_CONSISTS_OF
] = UNIT_PART_OF
,
1883 [UNIT_CONFLICTS
] = UNIT_CONFLICTED_BY
,
1884 [UNIT_CONFLICTED_BY
] = UNIT_CONFLICTS
,
1885 [UNIT_BEFORE
] = UNIT_AFTER
,
1886 [UNIT_AFTER
] = UNIT_BEFORE
,
1887 [UNIT_ON_FAILURE
] = _UNIT_DEPENDENCY_INVALID
,
1888 [UNIT_REFERENCES
] = UNIT_REFERENCED_BY
,
1889 [UNIT_REFERENCED_BY
] = UNIT_REFERENCES
,
1890 [UNIT_TRIGGERS
] = UNIT_TRIGGERED_BY
,
1891 [UNIT_TRIGGERED_BY
] = UNIT_TRIGGERS
,
1892 [UNIT_PROPAGATES_RELOAD_TO
] = UNIT_RELOAD_PROPAGATED_FROM
,
1893 [UNIT_RELOAD_PROPAGATED_FROM
] = UNIT_PROPAGATES_RELOAD_TO
,
1894 [UNIT_JOINS_NAMESPACE_OF
] = UNIT_JOINS_NAMESPACE_OF
,
1896 int r
, q
= 0, v
= 0, w
= 0;
1899 assert(d
>= 0 && d
< _UNIT_DEPENDENCY_MAX
);
1902 u
= unit_follow_merge(u
);
1903 other
= unit_follow_merge(other
);
1905 /* We won't allow dependencies on ourselves. We will not
1906 * consider them an error however. */
1910 r
= set_ensure_allocated(&u
->dependencies
[d
], trivial_hash_func
, trivial_compare_func
);
1914 if (inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
) {
1915 r
= set_ensure_allocated(&other
->dependencies
[inverse_table
[d
]], trivial_hash_func
, trivial_compare_func
);
1920 if (add_reference
) {
1921 r
= set_ensure_allocated(&u
->dependencies
[UNIT_REFERENCES
], trivial_hash_func
, trivial_compare_func
);
1925 r
= set_ensure_allocated(&other
->dependencies
[UNIT_REFERENCED_BY
], trivial_hash_func
, trivial_compare_func
);
1930 q
= set_put(u
->dependencies
[d
], other
);
1934 if (inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
&& inverse_table
[d
] != d
) {
1935 v
= set_put(other
->dependencies
[inverse_table
[d
]], u
);
1942 if (add_reference
) {
1943 w
= set_put(u
->dependencies
[UNIT_REFERENCES
], other
);
1949 r
= set_put(other
->dependencies
[UNIT_REFERENCED_BY
], u
);
1954 unit_add_to_dbus_queue(u
);
1959 set_remove(u
->dependencies
[d
], other
);
1962 set_remove(other
->dependencies
[inverse_table
[d
]], u
);
1965 set_remove(u
->dependencies
[UNIT_REFERENCES
], other
);
1970 int unit_add_two_dependencies(Unit
*u
, UnitDependency d
, UnitDependency e
, Unit
*other
, bool add_reference
) {
1975 if ((r
= unit_add_dependency(u
, d
, other
, add_reference
)) < 0)
1978 if ((r
= unit_add_dependency(u
, e
, other
, add_reference
)) < 0)
1984 static const char *resolve_template(Unit
*u
, const char *name
, const char*path
, char **p
) {
1988 assert(name
|| path
);
1992 name
= basename(path
);
1994 if (!unit_name_is_template(name
)) {
2000 s
= unit_name_replace_instance(name
, u
->instance
);
2002 _cleanup_free_
char *i
= NULL
;
2004 i
= unit_name_to_prefix(u
->id
);
2008 s
= unit_name_replace_instance(name
, i
);
2018 int unit_add_dependency_by_name(Unit
*u
, UnitDependency d
, const char *name
, const char *path
, bool add_reference
) {
2021 _cleanup_free_
char *s
= NULL
;
2024 assert(name
|| path
);
2026 name
= resolve_template(u
, name
, path
, &s
);
2030 r
= manager_load_unit(u
->manager
, name
, path
, NULL
, &other
);
2034 return unit_add_dependency(u
, d
, other
, add_reference
);
2037 int unit_add_two_dependencies_by_name(Unit
*u
, UnitDependency d
, UnitDependency e
, const char *name
, const char *path
, bool add_reference
) {
2040 _cleanup_free_
char *s
= NULL
;
2043 assert(name
|| path
);
2045 if (!(name
= resolve_template(u
, name
, path
, &s
)))
2048 if ((r
= manager_load_unit(u
->manager
, name
, path
, NULL
, &other
)) < 0)
2051 r
= unit_add_two_dependencies(u
, d
, e
, other
, add_reference
);
2056 int unit_add_dependency_by_name_inverse(Unit
*u
, UnitDependency d
, const char *name
, const char *path
, bool add_reference
) {
2059 _cleanup_free_
char *s
= NULL
;
2062 assert(name
|| path
);
2064 if (!(name
= resolve_template(u
, name
, path
, &s
)))
2067 if ((r
= manager_load_unit(u
->manager
, name
, path
, NULL
, &other
)) < 0)
2070 r
= unit_add_dependency(other
, d
, u
, add_reference
);
2075 int unit_add_two_dependencies_by_name_inverse(Unit
*u
, UnitDependency d
, UnitDependency e
, const char *name
, const char *path
, bool add_reference
) {
2078 _cleanup_free_
char *s
= NULL
;
2081 assert(name
|| path
);
2083 if (!(name
= resolve_template(u
, name
, path
, &s
)))
2086 if ((r
= manager_load_unit(u
->manager
, name
, path
, NULL
, &other
)) < 0)
2089 if ((r
= unit_add_two_dependencies(other
, d
, e
, u
, add_reference
)) < 0)
2095 int set_unit_path(const char *p
) {
2096 _cleanup_free_
char *c
= NULL
;
2098 /* This is mostly for debug purposes */
2099 c
= path_make_absolute_cwd(p
);
2100 if (setenv("SYSTEMD_UNIT_PATH", c
, 0) < 0)
2106 char *unit_dbus_path(Unit
*u
) {
2112 return unit_dbus_path_from_name(u
->id
);
2115 char *unit_default_cgroup_path(Unit
*u
) {
2116 _cleanup_free_
char *escaped
= NULL
, *slice
= NULL
;
2121 if (unit_has_name(u
, SPECIAL_ROOT_SLICE
))
2122 return strdup(u
->manager
->cgroup_root
);
2124 if (UNIT_ISSET(u
->slice
) && !unit_has_name(UNIT_DEREF(u
->slice
), SPECIAL_ROOT_SLICE
)) {
2125 r
= cg_slice_to_path(UNIT_DEREF(u
->slice
)->id
, &slice
);
2130 escaped
= cg_escape(u
->id
);
2135 return strjoin(u
->manager
->cgroup_root
, "/", slice
, "/", escaped
, NULL
);
2137 return strjoin(u
->manager
->cgroup_root
, "/", escaped
, NULL
);
2140 int unit_add_default_slice(Unit
*u
) {
2141 _cleanup_free_
char *b
= NULL
;
2142 const char *slice_name
;
2148 if (UNIT_ISSET(u
->slice
))
2151 if (!unit_get_cgroup_context(u
))
2155 _cleanup_free_
char *prefix
= NULL
, *escaped
= NULL
;
2157 /* Implicitly place all instantiated units in their
2158 * own per-template slice */
2160 prefix
= unit_name_to_prefix(u
->id
);
2164 /* The prefix is already escaped, but it might include
2165 * "-" which has a special meaning for slice units,
2166 * hence escape it here extra. */
2167 escaped
= strreplace(prefix
, "-", "\\x2d");
2171 if (u
->manager
->running_as
== SYSTEMD_SYSTEM
)
2172 b
= strjoin("system-", escaped
, ".slice", NULL
);
2174 b
= strappend(escaped
, ".slice");
2181 u
->manager
->running_as
== SYSTEMD_SYSTEM
2182 ? SPECIAL_SYSTEM_SLICE
2183 : SPECIAL_ROOT_SLICE
;
2185 r
= manager_load_unit(u
->manager
, slice_name
, NULL
, NULL
, &slice
);
2189 unit_ref_set(&u
->slice
, slice
);
2193 const char *unit_slice_name(Unit
*u
) {
2196 if (!UNIT_ISSET(u
->slice
))
2199 return UNIT_DEREF(u
->slice
)->id
;
2202 int unit_load_related_unit(Unit
*u
, const char *type
, Unit
**_found
) {
2203 _cleanup_free_
char *t
= NULL
;
2210 t
= unit_name_change_suffix(u
->id
, type
);
2214 assert(!unit_has_name(u
, t
));
2216 r
= manager_load_unit(u
->manager
, t
, NULL
, NULL
, _found
);
2217 assert(r
< 0 || *_found
!= u
);
2221 int unit_watch_bus_name(Unit
*u
, const char *name
) {
2225 /* Watch a specific name on the bus. We only support one unit
2226 * watching each name for now. */
2228 return hashmap_put(u
->manager
->watch_bus
, name
, u
);
2231 void unit_unwatch_bus_name(Unit
*u
, const char *name
) {
2235 hashmap_remove_value(u
->manager
->watch_bus
, name
, u
);
2238 bool unit_can_serialize(Unit
*u
) {
2241 return UNIT_VTABLE(u
)->serialize
&& UNIT_VTABLE(u
)->deserialize_item
;
2244 int unit_serialize(Unit
*u
, FILE *f
, FDSet
*fds
, bool serialize_jobs
) {
2252 if (!unit_can_serialize(u
))
2255 r
= UNIT_VTABLE(u
)->serialize(u
, f
, fds
);
2259 rt
= unit_get_exec_runtime(u
);
2261 r
= exec_runtime_serialize(rt
, u
, f
, fds
);
2266 dual_timestamp_serialize(f
, "inactive-exit-timestamp", &u
->inactive_exit_timestamp
);
2267 dual_timestamp_serialize(f
, "active-enter-timestamp", &u
->active_enter_timestamp
);
2268 dual_timestamp_serialize(f
, "active-exit-timestamp", &u
->active_exit_timestamp
);
2269 dual_timestamp_serialize(f
, "inactive-enter-timestamp", &u
->inactive_enter_timestamp
);
2270 dual_timestamp_serialize(f
, "condition-timestamp", &u
->condition_timestamp
);
2272 if (dual_timestamp_is_set(&u
->condition_timestamp
))
2273 unit_serialize_item(u
, f
, "condition-result", yes_no(u
->condition_result
));
2275 unit_serialize_item(u
, f
, "transient", yes_no(u
->transient
));
2278 unit_serialize_item(u
, f
, "cgroup", u
->cgroup_path
);
2280 if (serialize_jobs
) {
2282 fprintf(f
, "job\n");
2283 job_serialize(u
->job
, f
, fds
);
2287 fprintf(f
, "job\n");
2288 job_serialize(u
->nop_job
, f
, fds
);
2297 void unit_serialize_item_format(Unit
*u
, FILE *f
, const char *key
, const char *format
, ...) {
2308 va_start(ap
, format
);
2309 vfprintf(f
, format
, ap
);
2315 void unit_serialize_item(Unit
*u
, FILE *f
, const char *key
, const char *value
) {
2321 fprintf(f
, "%s=%s\n", key
, value
);
2324 int unit_deserialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2326 ExecRuntime
**rt
= NULL
;
2333 if (!unit_can_serialize(u
))
2336 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
2338 rt
= (ExecRuntime
**) ((uint8_t*) u
+ offset
);
2341 char line
[LINE_MAX
], *l
, *v
;
2344 if (!fgets(line
, sizeof(line
), f
)) {
2357 k
= strcspn(l
, "=");
2365 if (streq(l
, "job")) {
2367 /* new-style serialized job */
2368 Job
*j
= job_new_raw(u
);
2372 r
= job_deserialize(j
, f
, fds
);
2378 r
= hashmap_put(u
->manager
->jobs
, UINT32_TO_PTR(j
->id
), j
);
2384 r
= job_install_deserialized(j
);
2386 hashmap_remove(u
->manager
->jobs
, UINT32_TO_PTR(j
->id
));
2391 if (j
->state
== JOB_RUNNING
)
2392 u
->manager
->n_running_jobs
++;
2395 JobType type
= job_type_from_string(v
);
2397 log_debug("Failed to parse job type value %s", v
);
2399 u
->deserialized_job
= type
;
2402 } else if (streq(l
, "inactive-exit-timestamp")) {
2403 dual_timestamp_deserialize(v
, &u
->inactive_exit_timestamp
);
2405 } else if (streq(l
, "active-enter-timestamp")) {
2406 dual_timestamp_deserialize(v
, &u
->active_enter_timestamp
);
2408 } else if (streq(l
, "active-exit-timestamp")) {
2409 dual_timestamp_deserialize(v
, &u
->active_exit_timestamp
);
2411 } else if (streq(l
, "inactive-enter-timestamp")) {
2412 dual_timestamp_deserialize(v
, &u
->inactive_enter_timestamp
);
2414 } else if (streq(l
, "condition-timestamp")) {
2415 dual_timestamp_deserialize(v
, &u
->condition_timestamp
);
2417 } else if (streq(l
, "condition-result")) {
2420 b
= parse_boolean(v
);
2422 log_debug("Failed to parse condition result value %s", v
);
2424 u
->condition_result
= b
;
2428 } else if (streq(l
, "transient")) {
2431 b
= parse_boolean(v
);
2433 log_debug("Failed to parse transient bool %s", v
);
2438 } else if (streq(l
, "cgroup")) {
2445 free(u
->cgroup_path
);
2448 assert(hashmap_put(u
->manager
->cgroup_unit
, s
, u
) == 1);
2453 r
= exec_runtime_deserialize_item(rt
, u
, l
, v
, fds
);
2460 r
= UNIT_VTABLE(u
)->deserialize_item(u
, l
, v
, fds
);
2466 int unit_add_node_link(Unit
*u
, const char *what
, bool wants
) {
2468 _cleanup_free_
char *e
= NULL
;
2476 /* Adds in links to the device node that this unit is based on */
2478 if (!is_device_path(what
))
2481 e
= unit_name_from_path(what
, ".device");
2485 r
= manager_load_unit(u
->manager
, e
, NULL
, NULL
, &device
);
2490 r
= unit_add_two_dependencies(u
, UNIT_AFTER
, UNIT_BINDS_TO
, device
, true);
2495 r
= unit_add_dependency(device
, UNIT_WANTS
, u
, false);
2503 int unit_coldplug(Unit
*u
) {
2508 if (UNIT_VTABLE(u
)->coldplug
)
2509 if ((r
= UNIT_VTABLE(u
)->coldplug(u
)) < 0)
2513 r
= job_coldplug(u
->job
);
2516 } else if (u
->deserialized_job
>= 0) {
2518 r
= manager_add_job(u
->manager
, u
->deserialized_job
, u
, JOB_IGNORE_REQUIREMENTS
, false, NULL
, NULL
);
2522 u
->deserialized_job
= _JOB_TYPE_INVALID
;
2528 #pragma GCC diagnostic push
2529 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
2530 void unit_status_printf(Unit
*u
, const char *status
, const char *unit_status_msg_format
) {
2531 manager_status_printf(u
->manager
, false, status
, unit_status_msg_format
, unit_description(u
));
2533 #pragma GCC diagnostic pop
2535 bool unit_need_daemon_reload(Unit
*u
) {
2536 _cleanup_strv_free_
char **t
= NULL
;
2539 unsigned loaded_cnt
, current_cnt
;
2543 if (u
->fragment_path
) {
2545 if (stat(u
->fragment_path
, &st
) < 0)
2546 /* What, cannot access this anymore? */
2549 if (u
->fragment_mtime
> 0 &&
2550 timespec_load(&st
.st_mtim
) != u
->fragment_mtime
)
2554 if (u
->source_path
) {
2556 if (stat(u
->source_path
, &st
) < 0)
2559 if (u
->source_mtime
> 0 &&
2560 timespec_load(&st
.st_mtim
) != u
->source_mtime
)
2564 t
= unit_find_dropin_paths(u
);
2565 loaded_cnt
= strv_length(t
);
2566 current_cnt
= strv_length(u
->dropin_paths
);
2568 if (loaded_cnt
== current_cnt
) {
2569 if (loaded_cnt
== 0)
2572 if (strv_overlap(u
->dropin_paths
, t
)) {
2573 STRV_FOREACH(path
, u
->dropin_paths
) {
2575 if (stat(*path
, &st
) < 0)
2578 if (u
->dropin_mtime
> 0 &&
2579 timespec_load(&st
.st_mtim
) > u
->dropin_mtime
)
2590 void unit_reset_failed(Unit
*u
) {
2593 if (UNIT_VTABLE(u
)->reset_failed
)
2594 UNIT_VTABLE(u
)->reset_failed(u
);
2597 Unit
*unit_following(Unit
*u
) {
2600 if (UNIT_VTABLE(u
)->following
)
2601 return UNIT_VTABLE(u
)->following(u
);
2606 bool unit_stop_pending(Unit
*u
) {
2609 /* This call does check the current state of the unit. It's
2610 * hence useful to be called from state change calls of the
2611 * unit itself, where the state isn't updated yet. This is
2612 * different from unit_inactive_or_pending() which checks both
2613 * the current state and for a queued job. */
2615 return u
->job
&& u
->job
->type
== JOB_STOP
;
2618 bool unit_inactive_or_pending(Unit
*u
) {
2621 /* Returns true if the unit is inactive or going down */
2623 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)))
2626 if (unit_stop_pending(u
))
2632 bool unit_active_or_pending(Unit
*u
) {
2635 /* Returns true if the unit is active or going up */
2637 if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
2641 (u
->job
->type
== JOB_START
||
2642 u
->job
->type
== JOB_RELOAD_OR_START
||
2643 u
->job
->type
== JOB_RESTART
))
2649 int unit_kill(Unit
*u
, KillWho w
, int signo
, sd_bus_error
*error
) {
2651 assert(w
>= 0 && w
< _KILL_WHO_MAX
);
2653 assert(signo
< _NSIG
);
2655 if (!UNIT_VTABLE(u
)->kill
)
2658 return UNIT_VTABLE(u
)->kill(u
, w
, signo
, error
);
2661 static Set
*unit_pid_set(pid_t main_pid
, pid_t control_pid
) {
2665 pid_set
= set_new(trivial_hash_func
, trivial_compare_func
);
2669 /* Exclude the main/control pids from being killed via the cgroup */
2671 r
= set_put(pid_set
, LONG_TO_PTR(main_pid
));
2676 if (control_pid
> 0) {
2677 r
= set_put(pid_set
, LONG_TO_PTR(control_pid
));
2689 int unit_kill_common(
2695 sd_bus_error
*error
) {
2699 if (who
== KILL_MAIN
&& main_pid
<= 0) {
2701 sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no main processes", unit_type_to_string(u
->type
));
2703 sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No main process to kill");
2707 if (who
== KILL_CONTROL
&& control_pid
<= 0) {
2708 if (control_pid
< 0)
2709 sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no control processes", unit_type_to_string(u
->type
));
2711 sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No control process to kill");
2715 if (who
== KILL_CONTROL
|| who
== KILL_ALL
)
2716 if (control_pid
> 0)
2717 if (kill(control_pid
, signo
) < 0)
2720 if (who
== KILL_MAIN
|| who
== KILL_ALL
)
2722 if (kill(main_pid
, signo
) < 0)
2725 if (who
== KILL_ALL
&& u
->cgroup_path
) {
2726 _cleanup_set_free_ Set
*pid_set
= NULL
;
2729 /* Exclude the main/control pids from being killed via the cgroup */
2730 pid_set
= unit_pid_set(main_pid
, control_pid
);
2734 q
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, signo
, false, true, false, pid_set
);
2735 if (q
< 0 && q
!= -EAGAIN
&& q
!= -ESRCH
&& q
!= -ENOENT
)
2742 int unit_following_set(Unit
*u
, Set
**s
) {
2746 if (UNIT_VTABLE(u
)->following_set
)
2747 return UNIT_VTABLE(u
)->following_set(u
, s
);
2753 UnitFileState
unit_get_unit_file_state(Unit
*u
) {
2756 if (u
->unit_file_state
< 0 && u
->fragment_path
)
2757 u
->unit_file_state
= unit_file_get_state(
2758 u
->manager
->running_as
== SYSTEMD_SYSTEM
? UNIT_FILE_SYSTEM
: UNIT_FILE_USER
,
2759 NULL
, basename(u
->fragment_path
));
2761 return u
->unit_file_state
;
2764 Unit
* unit_ref_set(UnitRef
*ref
, Unit
*u
) {
2769 unit_ref_unset(ref
);
2772 LIST_PREPEND(refs
, u
->refs
, ref
);
2776 void unit_ref_unset(UnitRef
*ref
) {
2782 LIST_REMOVE(refs
, ref
->unit
->refs
, ref
);
2786 int unit_exec_context_defaults(Unit
*u
, ExecContext
*c
) {
2793 /* This only copies in the ones that need memory */
2794 for (i
= 0; i
< RLIMIT_NLIMITS
; i
++)
2795 if (u
->manager
->rlimit
[i
] && !c
->rlimit
[i
]) {
2796 c
->rlimit
[i
] = newdup(struct rlimit
, u
->manager
->rlimit
[i
], 1);
2801 if (u
->manager
->running_as
== SYSTEMD_USER
&&
2802 !c
->working_directory
) {
2804 r
= get_home_dir(&c
->working_directory
);
2812 ExecContext
*unit_get_exec_context(Unit
*u
) {
2816 offset
= UNIT_VTABLE(u
)->exec_context_offset
;
2820 return (ExecContext
*) ((uint8_t*) u
+ offset
);
2823 KillContext
*unit_get_kill_context(Unit
*u
) {
2827 offset
= UNIT_VTABLE(u
)->kill_context_offset
;
2831 return (KillContext
*) ((uint8_t*) u
+ offset
);
2834 CGroupContext
*unit_get_cgroup_context(Unit
*u
) {
2837 offset
= UNIT_VTABLE(u
)->cgroup_context_offset
;
2841 return (CGroupContext
*) ((uint8_t*) u
+ offset
);
2844 ExecRuntime
*unit_get_exec_runtime(Unit
*u
) {
2847 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
2851 return *(ExecRuntime
**) ((uint8_t*) u
+ offset
);
2854 static int drop_in_file(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, char **_p
, char **_q
) {
2855 _cleanup_free_
char *b
= NULL
;
2863 assert(mode
& (UNIT_PERSISTENT
|UNIT_RUNTIME
));
2865 b
= xescape(name
, "/.");
2869 if (!filename_is_safe(b
))
2872 if (u
->manager
->running_as
== SYSTEMD_USER
) {
2873 _cleanup_free_
char *c
= NULL
;
2875 r
= user_config_home(&c
);
2881 p
= strjoin(c
, "/", u
->id
, ".d", NULL
);
2882 } else if (mode
& UNIT_PERSISTENT
)
2883 p
= strjoin("/etc/systemd/system/", u
->id
, ".d", NULL
);
2885 p
= strjoin("/run/systemd/system/", u
->id
, ".d", NULL
);
2889 q
= strjoin(p
, "/90-", b
, ".conf", NULL
);
2900 int unit_write_drop_in(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *data
) {
2901 _cleanup_free_
char *p
= NULL
, *q
= NULL
;
2908 if (!(mode
& (UNIT_PERSISTENT
|UNIT_RUNTIME
)))
2911 r
= drop_in_file(u
, mode
, name
, &p
, &q
);
2916 return write_string_file_atomic_label(q
, data
);
2919 int unit_write_drop_in_format(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *format
, ...) {
2920 _cleanup_free_
char *p
= NULL
;
2928 if (!(mode
& (UNIT_PERSISTENT
|UNIT_RUNTIME
)))
2931 va_start(ap
, format
);
2932 r
= vasprintf(&p
, format
, ap
);
2938 return unit_write_drop_in(u
, mode
, name
, p
);
2941 int unit_write_drop_in_private(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *data
) {
2942 _cleanup_free_
char *ndata
= NULL
;
2948 if (!UNIT_VTABLE(u
)->private_section
)
2951 if (!(mode
& (UNIT_PERSISTENT
|UNIT_RUNTIME
)))
2954 ndata
= strjoin("[", UNIT_VTABLE(u
)->private_section
, "]\n", data
, NULL
);
2958 return unit_write_drop_in(u
, mode
, name
, ndata
);
2961 int unit_write_drop_in_private_format(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *format
, ...) {
2962 _cleanup_free_
char *p
= NULL
;
2970 if (!(mode
& (UNIT_PERSISTENT
|UNIT_RUNTIME
)))
2973 va_start(ap
, format
);
2974 r
= vasprintf(&p
, format
, ap
);
2980 return unit_write_drop_in_private(u
, mode
, name
, p
);
2983 int unit_remove_drop_in(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
) {
2984 _cleanup_free_
char *p
= NULL
, *q
= NULL
;
2989 if (!(mode
& (UNIT_PERSISTENT
|UNIT_RUNTIME
)))
2992 r
= drop_in_file(u
, mode
, name
, &p
, &q
);
2997 r
= errno
== ENOENT
? 0 : -errno
;
3005 int unit_make_transient(Unit
*u
) {
3010 u
->load_state
= UNIT_STUB
;
3012 u
->transient
= true;
3014 free(u
->fragment_path
);
3015 u
->fragment_path
= NULL
;
3017 if (u
->manager
->running_as
== SYSTEMD_USER
) {
3018 _cleanup_free_
char *c
= NULL
;
3020 r
= user_config_home(&c
);
3026 u
->fragment_path
= strjoin(c
, "/", u
->id
, NULL
);
3027 if (!u
->fragment_path
)
3032 u
->fragment_path
= strappend("/run/systemd/system/", u
->id
);
3033 if (!u
->fragment_path
)
3036 mkdir_p("/run/systemd/system", 0755);
3039 return write_string_file_atomic_label(u
->fragment_path
, "# Transient stub");
3042 int unit_kill_context(
3048 bool main_pid_alien
) {
3050 int sig
, wait_for_exit
= false, r
;
3055 if (c
->kill_mode
== KILL_NONE
)
3058 sig
= sigkill
? SIGKILL
: c
->kill_signal
;
3061 r
= kill_and_sigcont(main_pid
, sig
);
3063 if (r
< 0 && r
!= -ESRCH
) {
3064 _cleanup_free_
char *comm
= NULL
;
3065 get_process_comm(main_pid
, &comm
);
3067 log_warning_unit(u
->id
, "Failed to kill main process " PID_FMT
" (%s): %s", main_pid
, strna(comm
), strerror(-r
));
3069 if (!main_pid_alien
)
3070 wait_for_exit
= true;
3072 if (c
->send_sighup
&& !sigkill
)
3073 kill(main_pid
, SIGHUP
);
3077 if (control_pid
> 0) {
3078 r
= kill_and_sigcont(control_pid
, sig
);
3080 if (r
< 0 && r
!= -ESRCH
) {
3081 _cleanup_free_
char *comm
= NULL
;
3082 get_process_comm(control_pid
, &comm
);
3084 log_warning_unit(u
->id
, "Failed to kill control process " PID_FMT
" (%s): %s", control_pid
, strna(comm
), strerror(-r
));
3086 wait_for_exit
= true;
3088 if (c
->send_sighup
&& !sigkill
)
3089 kill(control_pid
, SIGHUP
);
3093 if ((c
->kill_mode
== KILL_CONTROL_GROUP
|| (c
->kill_mode
== KILL_MIXED
&& sigkill
)) && u
->cgroup_path
) {
3094 _cleanup_set_free_ Set
*pid_set
= NULL
;
3096 /* Exclude the main/control pids from being killed via the cgroup */
3097 pid_set
= unit_pid_set(main_pid
, control_pid
);
3101 r
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, sig
, true, true, false, pid_set
);
3103 if (r
!= -EAGAIN
&& r
!= -ESRCH
&& r
!= -ENOENT
)
3104 log_warning_unit(u
->id
, "Failed to kill control group: %s", strerror(-r
));
3107 /* FIXME: For now, we will not wait for the
3108 * cgroup members to die, simply because
3109 * cgroup notification is unreliable. It
3110 * doesn't work at all in containers, and
3111 * outside of containers it can be confused
3112 * easily by leaving directories in the
3115 /* wait_for_exit = true; */
3117 if (c
->send_sighup
&& !sigkill
) {
3120 pid_set
= unit_pid_set(main_pid
, control_pid
);
3124 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, SIGHUP
, false, true, false, pid_set
);
3129 return wait_for_exit
;
3132 int unit_require_mounts_for(Unit
*u
, const char *path
) {
3133 char prefix
[strlen(path
) + 1], *p
;
3139 /* Registers a unit for requiring a certain path and all its
3140 * prefixes. We keep a simple array of these paths in the
3141 * unit, since its usually short. However, we build a prefix
3142 * table for all possible prefixes so that new appearing mount
3143 * units can easily determine which units to make themselves a
3146 if (!path_is_absolute(path
))
3153 path_kill_slashes(p
);
3155 if (!path_is_safe(p
)) {
3160 if (strv_contains(u
->requires_mounts_for
, p
)) {
3165 r
= strv_push(&u
->requires_mounts_for
, p
);
3171 PATH_FOREACH_PREFIX_MORE(prefix
, p
) {
3174 x
= hashmap_get(u
->manager
->units_requiring_mounts_for
, prefix
);
3178 if (!u
->manager
->units_requiring_mounts_for
) {
3179 u
->manager
->units_requiring_mounts_for
= hashmap_new(string_hash_func
, string_compare_func
);
3180 if (!u
->manager
->units_requiring_mounts_for
)
3188 x
= set_new(NULL
, NULL
);
3194 r
= hashmap_put(u
->manager
->units_requiring_mounts_for
, q
, x
);
3210 int unit_setup_exec_runtime(Unit
*u
) {
3216 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
3219 /* Check if ther already is an ExecRuntime for this unit? */
3220 rt
= (ExecRuntime
**) ((uint8_t*) u
+ offset
);
3224 /* Try to get it from somebody else */
3225 SET_FOREACH(other
, u
->dependencies
[UNIT_JOINS_NAMESPACE_OF
], i
) {
3227 *rt
= unit_get_exec_runtime(other
);
3229 exec_runtime_ref(*rt
);
3234 return exec_runtime_make(rt
, unit_get_exec_context(u
), u
->id
);
3237 static const char* const unit_active_state_table
[_UNIT_ACTIVE_STATE_MAX
] = {
3238 [UNIT_ACTIVE
] = "active",
3239 [UNIT_RELOADING
] = "reloading",
3240 [UNIT_INACTIVE
] = "inactive",
3241 [UNIT_FAILED
] = "failed",
3242 [UNIT_ACTIVATING
] = "activating",
3243 [UNIT_DEACTIVATING
] = "deactivating"
3246 DEFINE_STRING_TABLE_LOOKUP(unit_active_state
, UnitActiveState
);
3248 static const char* const unit_dependency_table
[_UNIT_DEPENDENCY_MAX
] = {
3249 [UNIT_REQUIRES
] = "Requires",
3250 [UNIT_REQUIRES_OVERRIDABLE
] = "RequiresOverridable",
3251 [UNIT_REQUISITE
] = "Requisite",
3252 [UNIT_REQUISITE_OVERRIDABLE
] = "RequisiteOverridable",
3253 [UNIT_WANTS
] = "Wants",
3254 [UNIT_BINDS_TO
] = "BindsTo",
3255 [UNIT_PART_OF
] = "PartOf",
3256 [UNIT_REQUIRED_BY
] = "RequiredBy",
3257 [UNIT_REQUIRED_BY_OVERRIDABLE
] = "RequiredByOverridable",
3258 [UNIT_WANTED_BY
] = "WantedBy",
3259 [UNIT_BOUND_BY
] = "BoundBy",
3260 [UNIT_CONSISTS_OF
] = "ConsistsOf",
3261 [UNIT_CONFLICTS
] = "Conflicts",
3262 [UNIT_CONFLICTED_BY
] = "ConflictedBy",
3263 [UNIT_BEFORE
] = "Before",
3264 [UNIT_AFTER
] = "After",
3265 [UNIT_ON_FAILURE
] = "OnFailure",
3266 [UNIT_TRIGGERS
] = "Triggers",
3267 [UNIT_TRIGGERED_BY
] = "TriggeredBy",
3268 [UNIT_PROPAGATES_RELOAD_TO
] = "PropagatesReloadTo",
3269 [UNIT_RELOAD_PROPAGATED_FROM
] = "ReloadPropagatedFrom",
3270 [UNIT_REFERENCES
] = "References",
3271 [UNIT_REFERENCED_BY
] = "ReferencedBy",
3272 [UNIT_JOINS_NAMESPACE_OF
] = "JoinsNamespaceOf",
3275 DEFINE_STRING_TABLE_LOOKUP(unit_dependency
, UnitDependency
);