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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 | ||
9e2f7c11 LP |
39 | if (!(d = opendir(path))) { |
40 | ||
41 | if (errno == ENOENT) | |
42 | return 0; | |
43 | ||
44 | return -errno; | |
45 | } | |
46 | ||
47 | while ((de = readdir(d))) { | |
48 | char *f; | |
49 | ||
50 | if (ignore_file(de->d_name)) | |
51 | continue; | |
52 | ||
44d91056 LP |
53 | f = join(path, "/", de->d_name, NULL); |
54 | if (!f) { | |
9e2f7c11 LP |
55 | r = -ENOMEM; |
56 | goto finish; | |
57 | } | |
58 | ||
99f08d14 | 59 | r = unit_add_dependency_by_name(u, dependency, de->d_name, f, true); |
9e2f7c11 LP |
60 | free(f); |
61 | ||
62 | if (r < 0) | |
63 | goto finish; | |
64 | } | |
65 | ||
66 | r = 0; | |
67 | ||
68 | finish: | |
69 | closedir(d); | |
70 | return r; | |
71 | } | |
5cb5a6ff | 72 | |
99f08d14 | 73 | static int process_dir(Unit *u, const char *unit_path, const char *name, const char *suffix, UnitDependency dependency) { |
0301abf4 | 74 | int r; |
99f08d14 | 75 | char *path; |
0301abf4 | 76 | |
87f0e418 | 77 | assert(u); |
99f08d14 LP |
78 | assert(unit_path); |
79 | assert(name); | |
80 | assert(suffix); | |
5cb5a6ff | 81 | |
911a4828 LP |
82 | path = join(unit_path, "/", name, suffix, NULL); |
83 | if (!path) | |
99f08d14 | 84 | return -ENOMEM; |
5cb5a6ff | 85 | |
99f08d14 LP |
86 | if (u->meta.manager->unit_path_cache && |
87 | !set_get(u->meta.manager->unit_path_cache, path)) | |
88 | r = 0; | |
89 | else | |
90 | r = iterate_dir(u, path, dependency); | |
91 | free(path); | |
0301abf4 | 92 | |
99f08d14 LP |
93 | if (r < 0) |
94 | return r; | |
0301abf4 | 95 | |
99f08d14 LP |
96 | if (u->meta.instance) { |
97 | char *template; | |
98 | /* Also try the template dir */ | |
0301abf4 | 99 | |
99f08d14 LP |
100 | if (!(template = unit_name_template(name))) |
101 | return -ENOMEM; | |
0301abf4 | 102 | |
cd0ed1db | 103 | path = join(unit_path, "/", template, suffix, NULL); |
99f08d14 | 104 | free(template); |
0301abf4 | 105 | |
cd0ed1db | 106 | if (!path) |
99f08d14 | 107 | return -ENOMEM; |
0301abf4 | 108 | |
99f08d14 LP |
109 | if (u->meta.manager->unit_path_cache && |
110 | !set_get(u->meta.manager->unit_path_cache, path)) | |
111 | r = 0; | |
112 | else | |
113 | r = iterate_dir(u, path, dependency); | |
114 | free(path); | |
0301abf4 | 115 | |
99f08d14 LP |
116 | if (r < 0) |
117 | return r; | |
118 | } | |
0301abf4 | 119 | |
99f08d14 LP |
120 | return 0; |
121 | } | |
0301abf4 | 122 | |
99f08d14 LP |
123 | int unit_load_dropin(Unit *u) { |
124 | Iterator i; | |
125 | char *t; | |
126 | ||
127 | assert(u); | |
128 | ||
129 | /* Load dependencies from supplementary drop-in directories */ | |
036643a2 | 130 | |
99f08d14 LP |
131 | SET_FOREACH(t, u->meta.names, i) { |
132 | char **p; | |
133 | ||
134 | STRV_FOREACH(p, u->meta.manager->lookup_paths.unit_path) { | |
135 | int r; | |
0301abf4 | 136 | |
99f08d14 LP |
137 | if ((r = process_dir(u, *p, t, ".wants", UNIT_WANTS)) < 0) |
138 | return r; | |
139 | ||
140 | if ((r = process_dir(u, *p, t, ".requires", UNIT_REQUIRES)) < 0) | |
141 | return r; | |
036643a2 | 142 | } |
0301abf4 LP |
143 | } |
144 | ||
5cb5a6ff LP |
145 | return 0; |
146 | } |