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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 | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
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 | 29 | #include "unit-name.h" |
8afbb8e1 LP |
30 | #include "conf-parser.h" |
31 | #include "load-fragment.h" | |
5926ccca | 32 | #include "conf-files.h" |
8afbb8e1 | 33 | |
aa96c6cb LP |
34 | static int iterate_dir( |
35 | Unit *u, | |
36 | const char *path, | |
37 | UnitDependency dependency, | |
38 | char ***strv) { | |
39 | ||
8afbb8e1 | 40 | _cleanup_closedir_ DIR *d = NULL; |
9e2f7c11 LP |
41 | int r; |
42 | ||
99f08d14 LP |
43 | assert(u); |
44 | assert(path); | |
45 | ||
5926ccca LP |
46 | /* The config directories are special, since the order of the |
47 | * drop-ins matters */ | |
48 | if (dependency < 0) { | |
49 | r = strv_extend(strv, path); | |
50 | if (r < 0) | |
51 | return log_oom(); | |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
f917c3e5 LP |
56 | d = opendir(path); |
57 | if (!d) { | |
9e2f7c11 LP |
58 | if (errno == ENOENT) |
59 | return 0; | |
60 | ||
bcd816bd | 61 | log_error("Failed to open directory %s: %m", path); |
9e2f7c11 LP |
62 | return -errno; |
63 | } | |
64 | ||
8afbb8e1 LP |
65 | for (;;) { |
66 | struct dirent *de; | |
8afbb8e1 LP |
67 | _cleanup_free_ char *f = NULL; |
68 | int k; | |
69 | ||
9fa30063 FW |
70 | errno = 0; |
71 | de = readdir(d); | |
72 | if (!de && errno != 0) { | |
73 | k = errno; | |
8afbb8e1 LP |
74 | log_error("Failed to read directory %s: %s", path, strerror(k)); |
75 | return -k; | |
76 | } | |
77 | ||
78 | if (!de) | |
79 | break; | |
9e2f7c11 LP |
80 | |
81 | if (ignore_file(de->d_name)) | |
82 | continue; | |
83 | ||
b7def684 | 84 | f = strjoin(path, "/", de->d_name, NULL); |
8afbb8e1 LP |
85 | if (!f) |
86 | return log_oom(); | |
9e2f7c11 | 87 | |
5926ccca LP |
88 | r = unit_add_dependency_by_name(u, dependency, de->d_name, f, true); |
89 | if (r < 0) | |
90 | log_error("Cannot add dependency %s to %s, ignoring: %s", de->d_name, u->id, strerror(-r)); | |
9e2f7c11 LP |
91 | } |
92 | ||
8afbb8e1 | 93 | return 0; |
9e2f7c11 | 94 | } |
5cb5a6ff | 95 | |
aa96c6cb LP |
96 | static int process_dir( |
97 | Unit *u, | |
98 | const char *unit_path, | |
99 | const char *name, | |
100 | const char *suffix, | |
101 | UnitDependency dependency, | |
102 | char ***strv) { | |
103 | ||
fdb9161c | 104 | _cleanup_free_ char *path = NULL; |
0301abf4 | 105 | |
87f0e418 | 106 | assert(u); |
99f08d14 LP |
107 | assert(unit_path); |
108 | assert(name); | |
109 | assert(suffix); | |
5cb5a6ff | 110 | |
b7def684 | 111 | path = strjoin(unit_path, "/", name, suffix, NULL); |
911a4828 | 112 | if (!path) |
aa96c6cb | 113 | return log_oom(); |
5cb5a6ff | 114 | |
bcd816bd LP |
115 | if (!u->manager->unit_path_cache || set_get(u->manager->unit_path_cache, path)) |
116 | iterate_dir(u, path, dependency, strv); | |
0301abf4 | 117 | |
ac155bb8 | 118 | if (u->instance) { |
fdb9161c | 119 | _cleanup_free_ char *template = NULL, *p = NULL; |
99f08d14 | 120 | /* Also try the template dir */ |
0301abf4 | 121 | |
f917c3e5 LP |
122 | template = unit_name_template(name); |
123 | if (!template) | |
aa96c6cb | 124 | return log_oom(); |
0301abf4 | 125 | |
fdb9161c LP |
126 | p = strjoin(unit_path, "/", template, suffix, NULL); |
127 | if (!p) | |
aa96c6cb | 128 | return log_oom(); |
0301abf4 | 129 | |
bcd816bd LP |
130 | if (!u->manager->unit_path_cache || set_get(u->manager->unit_path_cache, p)) |
131 | iterate_dir(u, p, dependency, strv); | |
99f08d14 | 132 | } |
0301abf4 | 133 | |
99f08d14 LP |
134 | return 0; |
135 | } | |
0301abf4 | 136 | |
ae7a7182 | 137 | char **unit_find_dropin_paths(Unit *u) { |
5926ccca | 138 | _cleanup_strv_free_ char **strv = NULL; |
ae7a7182 | 139 | char **configs = NULL; |
aa96c6cb LP |
140 | Iterator i; |
141 | char *t; | |
5926ccca LP |
142 | int r; |
143 | ||
ae7a7182 OS |
144 | assert(u); |
145 | ||
146 | SET_FOREACH(t, u->names, i) { | |
147 | char **p; | |
148 | ||
bcd816bd LP |
149 | STRV_FOREACH(p, u->manager->lookup_paths.unit_path) |
150 | process_dir(u, *p, t, ".d", _UNIT_DEPENDENCY_INVALID, &strv); | |
ae7a7182 OS |
151 | } |
152 | ||
aa96c6cb LP |
153 | if (strv_isempty(strv)) |
154 | return NULL; | |
ae7a7182 | 155 | |
aa96c6cb LP |
156 | r = conf_files_list_strv(&configs, ".conf", NULL, (const char**) strv); |
157 | if (r < 0) { | |
158 | log_error("Failed to get list of configuration files: %s", strerror(-r)); | |
159 | strv_free(configs); | |
160 | return NULL; | |
ae7a7182 OS |
161 | } |
162 | ||
163 | return configs; | |
164 | } | |
165 | ||
166 | int unit_load_dropin(Unit *u) { | |
167 | Iterator i; | |
168 | char *t, **f; | |
99f08d14 LP |
169 | |
170 | assert(u); | |
171 | ||
172 | /* Load dependencies from supplementary drop-in directories */ | |
036643a2 | 173 | |
ac155bb8 | 174 | SET_FOREACH(t, u->names, i) { |
99f08d14 LP |
175 | char **p; |
176 | ||
ac155bb8 | 177 | STRV_FOREACH(p, u->manager->lookup_paths.unit_path) { |
bcd816bd LP |
178 | process_dir(u, *p, t, ".wants", UNIT_WANTS, NULL); |
179 | process_dir(u, *p, t, ".requires", UNIT_REQUIRES, NULL); | |
036643a2 | 180 | } |
0301abf4 LP |
181 | } |
182 | ||
ae7a7182 OS |
183 | u->dropin_paths = unit_find_dropin_paths(u); |
184 | if (! u->dropin_paths) | |
185 | return 0; | |
5926ccca | 186 | |
ae7a7182 | 187 | STRV_FOREACH(f, u->dropin_paths) { |
bcd816bd | 188 | config_parse(u->id, *f, NULL, |
36f822c4 ZJS |
189 | UNIT_VTABLE(u)->sections, |
190 | config_item_perf_lookup, load_fragment_gperf_lookup, | |
191 | false, false, false, u); | |
5926ccca LP |
192 | } |
193 | ||
ae7a7182 OS |
194 | u->dropin_mtime = now(CLOCK_REALTIME); |
195 | ||
5cb5a6ff LP |
196 | return 0; |
197 | } |