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29686440 ZJS |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2014 Zbigniew Jędrzejewski-Szmek | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
a8fbdf54 TA |
20 | #include <errno.h> |
21 | #include <stdarg.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | ||
b5efdb8a | 25 | #include "alloc-util.h" |
1a7f1b38 | 26 | #include "conf-files.h" |
8fb3f009 | 27 | #include "dirent-util.h" |
3ffd4af2 | 28 | #include "dropin.h" |
4f5dd394 | 29 | #include "escape.h" |
3ffd4af2 | 30 | #include "fd-util.h" |
4f5dd394 | 31 | #include "fileio-label.h" |
17e78d18 | 32 | #include "fs-util.h" |
a8fbdf54 TA |
33 | #include "hashmap.h" |
34 | #include "log.h" | |
35 | #include "macro.h" | |
4f5dd394 | 36 | #include "mkdir.h" |
bb15fafe | 37 | #include "path-util.h" |
a8fbdf54 | 38 | #include "set.h" |
07630cea | 39 | #include "string-util.h" |
4f5dd394 | 40 | #include "strv.h" |
a8fbdf54 | 41 | #include "unit-name.h" |
29686440 | 42 | |
8eea8687 | 43 | int drop_in_file(const char *dir, const char *unit, unsigned level, |
29686440 ZJS |
44 | const char *name, char **_p, char **_q) { |
45 | ||
46 | _cleanup_free_ char *b = NULL; | |
47 | char *p, *q; | |
48 | ||
8eea8687 ZJS |
49 | char prefix[DECIMAL_STR_MAX(unsigned)]; |
50 | ||
29686440 ZJS |
51 | assert(unit); |
52 | assert(name); | |
53 | assert(_p); | |
54 | assert(_q); | |
55 | ||
8eea8687 ZJS |
56 | sprintf(prefix, "%u", level); |
57 | ||
29686440 ZJS |
58 | b = xescape(name, "/."); |
59 | if (!b) | |
60 | return -ENOMEM; | |
61 | ||
ae6c3cc0 | 62 | if (!filename_is_valid(b)) |
29686440 ZJS |
63 | return -EINVAL; |
64 | ||
605405c6 | 65 | p = strjoin(dir, "/", unit, ".d"); |
29686440 ZJS |
66 | if (!p) |
67 | return -ENOMEM; | |
68 | ||
605405c6 | 69 | q = strjoin(p, "/", prefix, "-", b, ".conf"); |
29686440 ZJS |
70 | if (!q) { |
71 | free(p); | |
72 | return -ENOMEM; | |
73 | } | |
74 | ||
75 | *_p = p; | |
76 | *_q = q; | |
77 | return 0; | |
78 | } | |
79 | ||
8eea8687 | 80 | int write_drop_in(const char *dir, const char *unit, unsigned level, |
29686440 ZJS |
81 | const char *name, const char *data) { |
82 | ||
83 | _cleanup_free_ char *p = NULL, *q = NULL; | |
84 | int r; | |
85 | ||
86 | assert(dir); | |
87 | assert(unit); | |
88 | assert(name); | |
89 | assert(data); | |
90 | ||
8eea8687 | 91 | r = drop_in_file(dir, unit, level, name, &p, &q); |
29686440 ZJS |
92 | if (r < 0) |
93 | return r; | |
94 | ||
45519fd6 | 95 | (void) mkdir_p(p, 0755); |
29686440 ZJS |
96 | return write_string_file_atomic_label(q, data); |
97 | } | |
98 | ||
8eea8687 | 99 | int write_drop_in_format(const char *dir, const char *unit, unsigned level, |
29686440 ZJS |
100 | const char *name, const char *format, ...) { |
101 | _cleanup_free_ char *p = NULL; | |
102 | va_list ap; | |
103 | int r; | |
104 | ||
105 | assert(dir); | |
106 | assert(unit); | |
107 | assert(name); | |
108 | assert(format); | |
109 | ||
110 | va_start(ap, format); | |
111 | r = vasprintf(&p, format, ap); | |
112 | va_end(ap); | |
113 | ||
114 | if (r < 0) | |
115 | return -ENOMEM; | |
116 | ||
8eea8687 | 117 | return write_drop_in(dir, unit, level, name, p); |
29686440 | 118 | } |
1a7f1b38 | 119 | |
dcc4f30e | 120 | static int unit_file_find_dir( |
17e78d18 | 121 | const char *original_root, |
dcc4f30e ZJS |
122 | const char *path, |
123 | char ***dirs) { | |
1a7f1b38 | 124 | |
17e78d18 | 125 | _cleanup_free_ char *chased = NULL; |
1a7f1b38 ZJS |
126 | int r; |
127 | ||
128 | assert(path); | |
129 | ||
17e78d18 ZJS |
130 | r = chase_symlinks(path, original_root, 0, &chased); |
131 | if (r < 0) | |
132 | return log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, | |
133 | r, "Failed to canonicalize path %s: %m", path); | |
134 | ||
dcc4f30e ZJS |
135 | r = strv_push(dirs, chased); |
136 | if (r < 0) | |
137 | return log_oom(); | |
1a7f1b38 | 138 | |
dcc4f30e | 139 | chased = NULL; |
1a7f1b38 ZJS |
140 | return 0; |
141 | } | |
142 | ||
dcc4f30e | 143 | static int unit_file_find_dirs( |
17e78d18 | 144 | const char *original_root, |
7410616c | 145 | Set *unit_path_cache, |
1a7f1b38 ZJS |
146 | const char *unit_path, |
147 | const char *name, | |
148 | const char *suffix, | |
dcc4f30e | 149 | char ***dirs) { |
1a7f1b38 ZJS |
150 | |
151 | _cleanup_free_ char *path = NULL; | |
7410616c | 152 | int r; |
1a7f1b38 ZJS |
153 | |
154 | assert(unit_path); | |
155 | assert(name); | |
156 | assert(suffix); | |
157 | ||
605405c6 | 158 | path = strjoin(unit_path, "/", name, suffix); |
1a7f1b38 ZJS |
159 | if (!path) |
160 | return log_oom(); | |
161 | ||
dcc4f30e ZJS |
162 | if (!unit_path_cache || set_get(unit_path_cache, path)) { |
163 | r = unit_file_find_dir(original_root, path, dirs); | |
164 | if (r < 0) | |
165 | return r; | |
166 | } | |
1a7f1b38 | 167 | |
7410616c | 168 | if (unit_name_is_valid(name, UNIT_NAME_INSTANCE)) { |
1a7f1b38 ZJS |
169 | _cleanup_free_ char *template = NULL, *p = NULL; |
170 | /* Also try the template dir */ | |
171 | ||
7410616c LP |
172 | r = unit_name_template(name, &template); |
173 | if (r < 0) | |
174 | return log_error_errno(r, "Failed to generate template from unit name: %m"); | |
1a7f1b38 | 175 | |
605405c6 | 176 | p = strjoin(unit_path, "/", template, suffix); |
1a7f1b38 ZJS |
177 | if (!p) |
178 | return log_oom(); | |
179 | ||
dcc4f30e ZJS |
180 | if (!unit_path_cache || set_get(unit_path_cache, p)) { |
181 | r = unit_file_find_dir(original_root, p, dirs); | |
182 | if (r < 0) | |
183 | return r; | |
184 | } | |
1a7f1b38 ZJS |
185 | } |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | int unit_file_find_dropin_paths( | |
17e78d18 | 191 | const char *original_root, |
1a7f1b38 ZJS |
192 | char **lookup_path, |
193 | Set *unit_path_cache, | |
95778782 ZJS |
194 | const char *dir_suffix, |
195 | const char *file_suffix, | |
1a7f1b38 ZJS |
196 | Set *names, |
197 | char ***paths) { | |
198 | ||
dcc4f30e | 199 | _cleanup_strv_free_ char **dirs = NULL, **ans = NULL; |
1a7f1b38 | 200 | Iterator i; |
dcc4f30e | 201 | char *t, **p; |
1a7f1b38 ZJS |
202 | int r; |
203 | ||
204 | assert(paths); | |
205 | ||
dcc4f30e | 206 | SET_FOREACH(t, names, i) |
1a7f1b38 | 207 | STRV_FOREACH(p, lookup_path) |
dcc4f30e | 208 | unit_file_find_dirs(original_root, unit_path_cache, *p, t, dir_suffix, &dirs); |
1a7f1b38 | 209 | |
dcc4f30e | 210 | if (strv_isempty(dirs)) |
1a7f1b38 ZJS |
211 | return 0; |
212 | ||
dcc4f30e | 213 | r = conf_files_list_strv(&ans, file_suffix, NULL, (const char**) dirs); |
1a7f1b38 | 214 | if (r < 0) |
95778782 | 215 | return log_warning_errno(r, "Failed to sort the list of configuration files: %m"); |
1a7f1b38 ZJS |
216 | |
217 | *paths = ans; | |
218 | ans = NULL; | |
219 | return 1; | |
220 | } |