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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
a7334b09 | 2 | |
cf0fbc49 | 3 | #include "conf-parser.h" |
317cd27a | 4 | #include "fs-util.h" |
5cb5a6ff | 5 | #include "load-dropin.h" |
cf0fbc49 | 6 | #include "load-fragment.h" |
b952f2e1 | 7 | #include "log.h" |
95778782 | 8 | #include "stat-util.h" |
317cd27a | 9 | #include "string-util.h" |
036643a2 | 10 | #include "strv.h" |
9e2f7c11 | 11 | #include "unit-name.h" |
cf0fbc49 | 12 | #include "unit.h" |
8afbb8e1 | 13 | |
95778782 ZJS |
14 | static int process_deps(Unit *u, UnitDependency dependency, const char *dir_suffix) { |
15 | _cleanup_strv_free_ char **paths = NULL; | |
9e2f7c11 LP |
16 | int r; |
17 | ||
95778782 ZJS |
18 | r = unit_file_find_dropin_paths(NULL, |
19 | u->manager->lookup_paths.search_path, | |
20 | u->manager->unit_path_cache, | |
4562c355 ZJS |
21 | dir_suffix, NULL, |
22 | u->id, u->aliases, | |
95778782 | 23 | &paths); |
1a7f1b38 | 24 | if (r < 0) |
95778782 ZJS |
25 | return r; |
26 | ||
27 | STRV_FOREACH(p, paths) { | |
317cd27a | 28 | _cleanup_free_ char *target = NULL; |
b119facd | 29 | const char *entry; |
95778782 ZJS |
30 | |
31 | entry = basename(*p); | |
32 | ||
5be5d39b ZJS |
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); | |
37 | continue; | |
38 | } | |
39 | ||
95778782 ZJS |
40 | r = is_symlink(*p); |
41 | if (r < 0) { | |
42 | log_unit_warning_errno(u, r, "%s dropin %s unreadable, ignoring: %m", | |
43 | unit_dependency_to_string(dependency), *p); | |
44 | continue; | |
45 | } | |
46 | if (r == 0) { | |
47 | log_unit_warning(u, "%s dependency dropin %s is not a symlink, ignoring.", | |
48 | unit_dependency_to_string(dependency), *p); | |
49 | continue; | |
50 | } | |
51 | ||
317cd27a ZJS |
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); | |
55 | continue; | |
56 | } | |
57 | ||
58 | r = readlink_malloc(*p, &target); | |
59 | if (r < 0) { | |
60 | log_unit_warning_errno(u, r, "readlink(\"%s\") failed, ignoring: %m", *p); | |
61 | continue; | |
62 | } | |
63 | ||
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. */ | |
1bf15585 | 66 | r = unit_symlink_name_compatible(entry, basename(target), u->instance); |
45f4238a | 67 | if (r < 0) { |
9a4f9e69 ZJS |
68 | log_unit_warning_errno(u, r, "Can't check if names %s and %s are compatible, ignoring: %m", |
69 | entry, basename(target)); | |
45f4238a LP |
70 | continue; |
71 | } | |
72 | if (r == 0) | |
317cd27a ZJS |
73 | log_unit_warning(u, "%s dependency dropin %s target %s has different name", |
74 | unit_dependency_to_string(dependency), *p, target); | |
95778782 | 75 | |
35d8c19a | 76 | r = unit_add_dependency_by_name(u, dependency, entry, true, UNIT_DEPENDENCY_FILE); |
95778782 | 77 | if (r < 0) |
800f478c LP |
78 | log_unit_warning_errno(u, r, "Cannot add %s dependency on %s, ignoring: %m", |
79 | unit_dependency_to_string(dependency), entry); | |
95778782 | 80 | } |
9e2f7c11 | 81 | |
8afbb8e1 | 82 | return 0; |
9e2f7c11 | 83 | } |
5cb5a6ff | 84 | |
ae7a7182 | 85 | int unit_load_dropin(Unit *u) { |
d7e0da1d | 86 | _cleanup_strv_free_ char **l = NULL; |
1a7f1b38 | 87 | int r; |
99f08d14 LP |
88 | |
89 | assert(u); | |
90 | ||
38f90179 | 91 | /* Load dependencies from .wants, .requires and .upholds directories */ |
95778782 ZJS |
92 | r = process_deps(u, UNIT_WANTS, ".wants"); |
93 | if (r < 0) | |
94 | return r; | |
99f08d14 | 95 | |
95778782 ZJS |
96 | r = process_deps(u, UNIT_REQUIRES, ".requires"); |
97 | if (r < 0) | |
98 | return r; | |
0301abf4 | 99 | |
38f90179 MY |
100 | r = process_deps(u, UNIT_UPHOLDS, ".upholds"); |
101 | if (r < 0) | |
102 | return r; | |
103 | ||
95778782 | 104 | /* Load .conf dropins */ |
d7e0da1d | 105 | r = unit_find_dropin_paths(u, &l); |
1a7f1b38 | 106 | if (r <= 0) |
ae7a7182 | 107 | return 0; |
5926ccca | 108 | |
1cc6c93a YW |
109 | if (!u->dropin_paths) |
110 | u->dropin_paths = TAKE_PTR(l); | |
111 | else { | |
d7e0da1d LP |
112 | r = strv_extend_strv(&u->dropin_paths, l, true); |
113 | if (r < 0) | |
114 | return log_oom(); | |
115 | } | |
116 | ||
da46a1bc | 117 | u->dropin_mtime = 0; |
8524db50 YW |
118 | STRV_FOREACH(f, u->dropin_paths) { |
119 | struct stat st; | |
120 | ||
121 | r = config_parse(u->id, *f, NULL, | |
122 | UNIT_VTABLE(u)->sections, | |
123 | config_item_perf_lookup, load_fragment_gperf_lookup, | |
124 | 0, u, &st); | |
125 | if (r > 0) | |
126 | u->dropin_mtime = MAX(u->dropin_mtime, timespec_load(&st.st_mtim)); | |
127 | } | |
ae7a7182 | 128 | |
5cb5a6ff LP |
129 | return 0; |
130 | } |