1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
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
;
18 r
= unit_file_find_dropin_paths(NULL
,
19 u
->manager
->lookup_paths
.search_path
,
20 u
->manager
->unit_path_cache
,
27 STRV_FOREACH(p
, paths
) {
28 _cleanup_free_
char *target
= NULL
;
33 if (null_or_empty_path(*p
) > 0) {
34 /* an error usually means an invalid symlink, which is not a mask */
35 log_unit_debug(u
, "%s dependency on %s is masked by %s, ignoring.",
36 unit_dependency_to_string(dependency
), entry
, *p
);
42 log_unit_warning_errno(u
, r
, "%s dropin %s unreadable, ignoring: %m",
43 unit_dependency_to_string(dependency
), *p
);
47 log_unit_warning(u
, "%s dependency dropin %s is not a symlink, ignoring.",
48 unit_dependency_to_string(dependency
), *p
);
52 if (!unit_name_is_valid(entry
, UNIT_NAME_ANY
)) {
53 log_unit_warning(u
, "%s dependency dropin %s is not a valid unit name, ignoring.",
54 unit_dependency_to_string(dependency
), *p
);
58 r
= readlink_malloc(*p
, &target
);
60 log_unit_warning_errno(u
, r
, "readlink(\"%s\") failed, ignoring: %m", *p
);
64 /* We don't treat this as an error, especially because we didn't check this for a
65 * long time. Nevertheless, we warn, because such mismatch can be mighty confusing. */
66 r
= unit_symlink_name_compatible(entry
, basename(target
), u
->instance
);
68 log_unit_warning_errno(u
, r
, "Can't check if names %s and %s are compatible, ignoring: %m",
69 entry
, basename(target
));
73 log_unit_warning(u
, "%s dependency dropin %s target %s has different name",
74 unit_dependency_to_string(dependency
), *p
, target
);
76 r
= unit_add_dependency_by_name(u
, dependency
, entry
, true, UNIT_DEPENDENCY_FILE
);
78 log_unit_warning_errno(u
, r
, "Cannot add %s dependency on %s, ignoring: %m",
79 unit_dependency_to_string(dependency
), entry
);
85 int unit_load_dropin(Unit
*u
) {
86 _cleanup_strv_free_
char **l
= NULL
;
91 /* Load dependencies from .wants, .requires and .upholds directories */
92 r
= process_deps(u
, UNIT_WANTS
, ".wants");
96 r
= process_deps(u
, UNIT_REQUIRES
, ".requires");
100 r
= process_deps(u
, UNIT_UPHOLDS
, ".upholds");
104 /* Load .conf dropins */
105 r
= unit_find_dropin_paths(u
, &l
);
109 if (!u
->dropin_paths
)
110 u
->dropin_paths
= TAKE_PTR(l
);
112 r
= strv_extend_strv(&u
->dropin_paths
, l
, true);
118 STRV_FOREACH(f
, u
->dropin_paths
) {
121 r
= config_parse(u
->id
, *f
, NULL
,
122 UNIT_VTABLE(u
)->sections
,
123 config_item_perf_lookup
, load_fragment_gperf_lookup
,
126 u
->dropin_mtime
= MAX(u
->dropin_mtime
, timespec_load(&st
.st_mtim
));