1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 #include "conf-parser.h"
5 #include "load-dropin.h"
6 #include "load-fragment.h"
9 #include "string-util.h"
11 #include "unit-name.h"
14 static int process_deps(Unit
*u
, UnitDependency dependency
, const char *dir_suffix
) {
15 _cleanup_strv_free_
char **paths
= NULL
;
19 r
= unit_file_find_dropin_paths(NULL
,
20 u
->manager
->lookup_paths
.search_path
,
21 u
->manager
->unit_path_cache
,
29 STRV_FOREACH(p
, paths
) {
30 _cleanup_free_
char *target
= NULL
;
35 if (null_or_empty_path(*p
) > 0) {
36 /* an error usually means an invalid symlink, which is not a mask */
37 log_unit_debug(u
, "%s dependency on %s is masked by %s, ignoring.",
38 unit_dependency_to_string(dependency
), entry
, *p
);
44 log_unit_warning_errno(u
, r
, "%s dropin %s unreadable, ignoring: %m",
45 unit_dependency_to_string(dependency
), *p
);
49 log_unit_warning(u
, "%s dependency dropin %s is not a symlink, ignoring.",
50 unit_dependency_to_string(dependency
), *p
);
54 if (!unit_name_is_valid(entry
, UNIT_NAME_ANY
)) {
55 log_unit_warning(u
, "%s dependency dropin %s is not a valid unit name, ignoring.",
56 unit_dependency_to_string(dependency
), *p
);
60 r
= readlink_malloc(*p
, &target
);
62 log_unit_warning_errno(u
, r
, "readlink(\"%s\") failed, ignoring: %m", *p
);
66 /* We don't treat this as an error, especially because we didn't check this for a
67 * long time. Nevertheless, we warn, because such mismatch can be mighty confusing. */
68 r
= unit_symlink_name_compatible(entry
, basename(target
), u
->instance
);
70 log_unit_warning_errno(u
, r
, "Can't check if names %s and %s are compatible, ignoring: %m",
71 entry
, basename(target
));
75 log_unit_warning(u
, "%s dependency dropin %s target %s has different name",
76 unit_dependency_to_string(dependency
), *p
, target
);
78 r
= unit_add_dependency_by_name(u
, dependency
, entry
, true, UNIT_DEPENDENCY_FILE
);
80 log_unit_warning_errno(u
, r
, "Cannot add %s dependency on %s, ignoring: %m",
81 unit_dependency_to_string(dependency
), entry
);
87 int unit_load_dropin(Unit
*u
) {
88 _cleanup_strv_free_
char **l
= NULL
;
94 /* Load dependencies from .wants and .requires directories */
95 r
= process_deps(u
, UNIT_WANTS
, ".wants");
99 r
= process_deps(u
, UNIT_REQUIRES
, ".requires");
103 /* Load .conf dropins */
104 r
= unit_find_dropin_paths(u
, &l
);
108 if (!u
->dropin_paths
)
109 u
->dropin_paths
= TAKE_PTR(l
);
111 r
= strv_extend_strv(&u
->dropin_paths
, l
, true);
116 STRV_FOREACH(f
, u
->dropin_paths
)
117 (void) config_parse(u
->id
, *f
, NULL
,
118 UNIT_VTABLE(u
)->sections
,
119 config_item_perf_lookup
, load_fragment_gperf_lookup
,
122 u
->dropin_mtime
= now(CLOCK_REALTIME
);