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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
5cb5a6ff | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
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 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
0301abf4 LP |
22 | #include <dirent.h> |
23 | #include <errno.h> | |
24 | ||
25 | #include "unit.h" | |
5cb5a6ff | 26 | #include "load-dropin.h" |
b952f2e1 | 27 | #include "log.h" |
036643a2 | 28 | #include "strv.h" |
9e2f7c11 LP |
29 | #include "unit-name.h" |
30 | ||
99f08d14 | 31 | static int iterate_dir(Unit *u, const char *path, UnitDependency dependency) { |
9e2f7c11 LP |
32 | DIR *d; |
33 | struct dirent *de; | |
34 | int r; | |
35 | ||
99f08d14 LP |
36 | assert(u); |
37 | assert(path); | |
38 | ||
f917c3e5 LP |
39 | d = opendir(path); |
40 | if (!d) { | |
9e2f7c11 LP |
41 | |
42 | if (errno == ENOENT) | |
43 | return 0; | |
44 | ||
45 | return -errno; | |
46 | } | |
47 | ||
48 | while ((de = readdir(d))) { | |
49 | char *f; | |
50 | ||
51 | if (ignore_file(de->d_name)) | |
52 | continue; | |
53 | ||
44d91056 LP |
54 | f = join(path, "/", de->d_name, NULL); |
55 | if (!f) { | |
9e2f7c11 LP |
56 | r = -ENOMEM; |
57 | goto finish; | |
58 | } | |
59 | ||
99f08d14 | 60 | r = unit_add_dependency_by_name(u, dependency, de->d_name, f, true); |
9e2f7c11 LP |
61 | free(f); |
62 | ||
63 | if (r < 0) | |
ac155bb8 | 64 | log_error("Cannot add dependency %s to %s, ignoring: %s", de->d_name, u->id, strerror(-r)); |
9e2f7c11 LP |
65 | } |
66 | ||
67 | r = 0; | |
68 | ||
69 | finish: | |
70 | closedir(d); | |
71 | return r; | |
72 | } | |
5cb5a6ff | 73 | |
99f08d14 | 74 | static int process_dir(Unit *u, const char *unit_path, const char *name, const char *suffix, UnitDependency dependency) { |
0301abf4 | 75 | int r; |
99f08d14 | 76 | char *path; |
0301abf4 | 77 | |
87f0e418 | 78 | assert(u); |
99f08d14 LP |
79 | assert(unit_path); |
80 | assert(name); | |
81 | assert(suffix); | |
5cb5a6ff | 82 | |
911a4828 LP |
83 | path = join(unit_path, "/", name, suffix, NULL); |
84 | if (!path) | |
99f08d14 | 85 | return -ENOMEM; |
5cb5a6ff | 86 | |
ac155bb8 MS |
87 | if (u->manager->unit_path_cache && |
88 | !set_get(u->manager->unit_path_cache, path)) | |
99f08d14 LP |
89 | r = 0; |
90 | else | |
91 | r = iterate_dir(u, path, dependency); | |
92 | free(path); | |
0301abf4 | 93 | |
99f08d14 LP |
94 | if (r < 0) |
95 | return r; | |
0301abf4 | 96 | |
ac155bb8 | 97 | if (u->instance) { |
99f08d14 LP |
98 | char *template; |
99 | /* Also try the template dir */ | |
0301abf4 | 100 | |
f917c3e5 LP |
101 | template = unit_name_template(name); |
102 | if (!template) | |
99f08d14 | 103 | return -ENOMEM; |
0301abf4 | 104 | |
cd0ed1db | 105 | path = join(unit_path, "/", template, suffix, NULL); |
99f08d14 | 106 | free(template); |
0301abf4 | 107 | |
cd0ed1db | 108 | if (!path) |
99f08d14 | 109 | return -ENOMEM; |
0301abf4 | 110 | |
ac155bb8 MS |
111 | if (u->manager->unit_path_cache && |
112 | !set_get(u->manager->unit_path_cache, path)) | |
99f08d14 LP |
113 | r = 0; |
114 | else | |
115 | r = iterate_dir(u, path, dependency); | |
116 | free(path); | |
0301abf4 | 117 | |
99f08d14 LP |
118 | if (r < 0) |
119 | return r; | |
120 | } | |
0301abf4 | 121 | |
99f08d14 LP |
122 | return 0; |
123 | } | |
0301abf4 | 124 | |
99f08d14 LP |
125 | int unit_load_dropin(Unit *u) { |
126 | Iterator i; | |
127 | char *t; | |
128 | ||
129 | assert(u); | |
130 | ||
131 | /* Load dependencies from supplementary drop-in directories */ | |
036643a2 | 132 | |
ac155bb8 | 133 | SET_FOREACH(t, u->names, i) { |
99f08d14 LP |
134 | char **p; |
135 | ||
ac155bb8 | 136 | STRV_FOREACH(p, u->manager->lookup_paths.unit_path) { |
99f08d14 | 137 | int r; |
0301abf4 | 138 | |
f917c3e5 LP |
139 | r = process_dir(u, *p, t, ".wants", UNIT_WANTS); |
140 | if (r < 0) | |
99f08d14 LP |
141 | return r; |
142 | ||
f917c3e5 LP |
143 | r = process_dir(u, *p, t, ".requires", UNIT_REQUIRES); |
144 | if (r < 0) | |
99f08d14 | 145 | return r; |
036643a2 | 146 | } |
0301abf4 LP |
147 | } |
148 | ||
5cb5a6ff LP |
149 | return 0; |
150 | } |