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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
2c21044f KS |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
2c21044f KS |
6 | ***/ |
7 | ||
07630cea | 8 | #include <dirent.h> |
2c21044f | 9 | #include <errno.h> |
11c3a366 | 10 | #include <stdarg.h> |
2c21044f | 11 | #include <stdio.h> |
07630cea LP |
12 | #include <stdlib.h> |
13 | #include <string.h> | |
2c21044f | 14 | |
3ffd4af2 | 15 | #include "conf-files.h" |
854a42fb | 16 | #include "def.h" |
a0956174 | 17 | #include "dirent-util.h" |
3ffd4af2 | 18 | #include "fd-util.h" |
07630cea LP |
19 | #include "hashmap.h" |
20 | #include "log.h" | |
2c21044f | 21 | #include "macro.h" |
2c21044f | 22 | #include "missing.h" |
9eb977db | 23 | #include "path-util.h" |
b5084605 | 24 | #include "stat-util.h" |
07630cea LP |
25 | #include "string-util.h" |
26 | #include "strv.h" | |
854a42fb | 27 | #include "terminal-util.h" |
07630cea | 28 | #include "util.h" |
2c21044f | 29 | |
b5084605 | 30 | static int files_add(Hashmap *h, const char *suffix, const char *root, unsigned flags, const char *path) { |
fabe5c0e | 31 | _cleanup_closedir_ DIR *dir = NULL; |
1d13f648 | 32 | const char *dirpath; |
31d5192d | 33 | struct dirent *de; |
1d13f648 | 34 | int r; |
e02caf30 | 35 | |
cba2ef02 | 36 | assert(path); |
cebed500 | 37 | |
1d13f648 | 38 | dirpath = prefix_roota(root, path); |
cebed500 | 39 | |
cba2ef02 | 40 | dir = opendir(dirpath); |
2c21044f KS |
41 | if (!dir) { |
42 | if (errno == ENOENT) | |
43 | return 0; | |
44 | return -errno; | |
45 | } | |
46 | ||
31d5192d | 47 | FOREACH_DIRENT(de, dir, return -errno) { |
2c21044f KS |
48 | char *p; |
49 | ||
e34aa8ed LP |
50 | if (!dirent_is_file_with_suffix(de, suffix)) { |
51 | log_debug("Ignoring %s/%s, because it's not a regular file with suffix %s.", dirpath, de->d_name, strna(suffix)); | |
2c21044f | 52 | continue; |
e34aa8ed | 53 | } |
2c21044f | 54 | |
b5084605 LP |
55 | if (flags & CONF_FILES_EXECUTABLE) { |
56 | struct stat st; | |
57 | ||
58 | /* As requested: check if the file is marked exectuable. Note that we don't check access(X_OK) | |
59 | * here, as we care about whether the file is marked executable at all, and not whether it is | |
60 | * executable for us, because if such errors are stuff we should log about. */ | |
61 | ||
62 | if (fstatat(dirfd(dir), de->d_name, &st, 0) < 0) { | |
63 | log_debug_errno(errno, "Failed to stat %s/%s, ignoring: %m", dirpath, de->d_name); | |
64 | continue; | |
65 | } | |
66 | ||
6a464351 ZJS |
67 | if (!null_or_empty(&st)) { |
68 | /* A mask is a symlink to /dev/null or an empty file. It does not even | |
69 | * have to be executable. Other entries must be regular executable files | |
70 | * or symlinks to them. */ | |
71 | if (S_ISREG(st.st_mode)) { | |
72 | if ((st.st_mode & 0111) == 0) { /* not executable */ | |
73 | log_debug("Ignoring %s/%s, as it is not marked executable.", | |
74 | dirpath, de->d_name); | |
75 | continue; | |
76 | } | |
77 | } else { | |
78 | log_debug("Ignoring %s/%s, as it is neither a regular file nor a mask.", | |
79 | dirpath, de->d_name); | |
b5084605 LP |
80 | continue; |
81 | } | |
b5084605 LP |
82 | } |
83 | } | |
84 | ||
605405c6 | 85 | p = strjoin(dirpath, "/", de->d_name); |
fabe5c0e | 86 | if (!p) |
e02caf30 | 87 | return -ENOMEM; |
2c21044f | 88 | |
2b6bf07d | 89 | r = hashmap_put(h, basename(p), p); |
fabe5c0e LP |
90 | if (r == -EEXIST) { |
91 | log_debug("Skipping overridden file: %s.", p); | |
92 | free(p); | |
93 | } else if (r < 0) { | |
94 | free(p); | |
95 | return r; | |
96 | } else if (r == 0) { | |
97 | log_debug("Duplicate file %s", p); | |
2c21044f KS |
98 | free(p); |
99 | } | |
100 | } | |
101 | ||
e02caf30 | 102 | return 0; |
2c21044f KS |
103 | } |
104 | ||
105 | static int base_cmp(const void *a, const void *b) { | |
106 | const char *s1, *s2; | |
107 | ||
108 | s1 = *(char * const *)a; | |
109 | s2 = *(char * const *)b; | |
2b6bf07d | 110 | return strcmp(basename(s1), basename(s2)); |
2c21044f KS |
111 | } |
112 | ||
b5084605 | 113 | static int conf_files_list_strv_internal(char ***strv, const char *suffix, const char *root, unsigned flags, char **dirs) { |
e1d75803 | 114 | _cleanup_hashmap_free_ Hashmap *fh = NULL; |
fabe5c0e | 115 | char **files, **p; |
578ac060 | 116 | int r; |
2c21044f | 117 | |
fabe5c0e | 118 | assert(strv); |
fabe5c0e LP |
119 | |
120 | /* This alters the dirs string array */ | |
7d8da2c9 | 121 | if (!path_strv_resolve_uniq(dirs, root)) |
fabe5c0e | 122 | return -ENOMEM; |
2c21044f | 123 | |
d5099efc | 124 | fh = hashmap_new(&string_hash_ops); |
fabe5c0e LP |
125 | if (!fh) |
126 | return -ENOMEM; | |
2c21044f KS |
127 | |
128 | STRV_FOREACH(p, dirs) { | |
b5084605 | 129 | r = files_add(fh, suffix, root, flags, *p); |
31d5192d | 130 | if (r == -ENOMEM) |
fabe5c0e | 131 | return r; |
31d5192d LP |
132 | if (r < 0) |
133 | log_debug_errno(r, "Failed to search for files in %s, ignoring: %m", *p); | |
2c21044f KS |
134 | } |
135 | ||
136 | files = hashmap_get_strv(fh); | |
31d5192d | 137 | if (!files) |
fabe5c0e | 138 | return -ENOMEM; |
fabe5c0e | 139 | |
7ff7394d | 140 | qsort_safe(files, hashmap_size(fh), sizeof(char *), base_cmp); |
fabe5c0e | 141 | *strv = files; |
2c21044f | 142 | |
fabe5c0e LP |
143 | return 0; |
144 | } | |
145 | ||
a6d8474f | 146 | int conf_files_insert(char ***strv, const char *root, char **dirs, const char *path) { |
d16a1c1b ZJS |
147 | /* Insert a path into strv, at the place honouring the usual sorting rules: |
148 | * - we first compare by the basename | |
149 | * - and then we compare by dirname, allowing just one file with the given | |
150 | * basename. | |
151 | * This means that we will | |
152 | * - add a new entry if basename(path) was not on the list, | |
153 | * - do nothing if an entry with higher priority was already present, | |
154 | * - do nothing if our new entry matches the existing entry, | |
155 | * - replace the existing entry if our new entry has higher priority. | |
156 | */ | |
157 | char *t; | |
158 | unsigned i; | |
159 | int r; | |
160 | ||
161 | for (i = 0; i < strv_length(*strv); i++) { | |
162 | int c; | |
163 | ||
164 | c = base_cmp(*strv + i, &path); | |
165 | if (c == 0) { | |
a6d8474f | 166 | char **dir; |
d16a1c1b ZJS |
167 | |
168 | /* Oh, we found our spot and it already contains something. */ | |
a6d8474f | 169 | STRV_FOREACH(dir, dirs) { |
d16a1c1b ZJS |
170 | char *p1, *p2; |
171 | ||
172 | p1 = path_startswith((*strv)[i], root); | |
173 | if (p1) | |
a6d8474f ZJS |
174 | /* Skip "/" in *dir, because p1 is without "/" too */ |
175 | p1 = path_startswith(p1, *dir + 1); | |
d16a1c1b ZJS |
176 | if (p1) |
177 | /* Existing entry with higher priority | |
178 | * or same priority, no need to do anything. */ | |
179 | return 0; | |
180 | ||
a6d8474f | 181 | p2 = path_startswith(path, *dir); |
d16a1c1b ZJS |
182 | if (p2) { |
183 | /* Our new entry has higher priority */ | |
184 | t = path_join(root, path, NULL); | |
185 | if (!t) | |
186 | return log_oom(); | |
187 | ||
188 | return free_and_replace((*strv)[i], t); | |
189 | } | |
190 | } | |
191 | ||
192 | } else if (c > 0) | |
193 | /* Following files have lower priority, let's go insert our | |
194 | * new entry. */ | |
195 | break; | |
196 | ||
197 | /* … we are not there yet, let's continue */ | |
198 | } | |
199 | ||
200 | t = path_join(root, path, NULL); | |
201 | if (!t) | |
202 | return log_oom(); | |
203 | ||
204 | r = strv_insert(strv, i, t); | |
205 | if (r < 0) | |
206 | free(t); | |
207 | return r; | |
208 | } | |
209 | ||
a6d8474f ZJS |
210 | int conf_files_insert_nulstr(char ***strv, const char *root, const char *dirs, const char *path) { |
211 | _cleanup_strv_free_ char **d = NULL; | |
212 | ||
213 | assert(strv); | |
214 | ||
215 | d = strv_split_nulstr(dirs); | |
216 | if (!d) | |
217 | return -ENOMEM; | |
218 | ||
219 | return conf_files_insert(strv, root, d, path); | |
220 | } | |
221 | ||
b5084605 | 222 | int conf_files_list_strv(char ***strv, const char *suffix, const char *root, unsigned flags, const char* const* dirs) { |
fabe5c0e LP |
223 | _cleanup_strv_free_ char **copy = NULL; |
224 | ||
225 | assert(strv); | |
fabe5c0e LP |
226 | |
227 | copy = strv_copy((char**) dirs); | |
228 | if (!copy) | |
229 | return -ENOMEM; | |
230 | ||
b5084605 | 231 | return conf_files_list_strv_internal(strv, suffix, root, flags, copy); |
2c21044f KS |
232 | } |
233 | ||
b5084605 | 234 | int conf_files_list(char ***strv, const char *suffix, const char *root, unsigned flags, const char *dir, ...) { |
8201ad81 LP |
235 | _cleanup_strv_free_ char **dirs = NULL; |
236 | va_list ap; | |
fabe5c0e LP |
237 | |
238 | assert(strv); | |
2c21044f | 239 | |
8201ad81 LP |
240 | va_start(ap, dir); |
241 | dirs = strv_new_ap(dir, ap); | |
242 | va_end(ap); | |
243 | ||
244 | if (!dirs) | |
245 | return -ENOMEM; | |
fabe5c0e | 246 | |
b5084605 | 247 | return conf_files_list_strv_internal(strv, suffix, root, flags, dirs); |
fabe5c0e | 248 | } |
2c21044f | 249 | |
a6d8474f ZJS |
250 | int conf_files_list_nulstr(char ***strv, const char *suffix, const char *root, unsigned flags, const char *dirs) { |
251 | _cleanup_strv_free_ char **d = NULL; | |
fabe5c0e LP |
252 | |
253 | assert(strv); | |
fabe5c0e | 254 | |
a6d8474f ZJS |
255 | d = strv_split_nulstr(dirs); |
256 | if (!d) | |
fabe5c0e | 257 | return -ENOMEM; |
2c21044f | 258 | |
a6d8474f | 259 | return conf_files_list_strv_internal(strv, suffix, root, flags, d); |
2c21044f | 260 | } |
854a42fb ZJS |
261 | |
262 | int conf_files_cat(const char *name) { | |
263 | _cleanup_strv_free_ char **dirs = NULL, **files = NULL; | |
264 | const char *dir; | |
265 | char **t; | |
266 | int r; | |
267 | ||
268 | NULSTR_FOREACH(dir, CONF_PATHS_NULSTR("")) { | |
269 | assert(endswith(dir, "/")); | |
270 | r = strv_extendf(&dirs, "%s%s.d", dir, name); | |
271 | if (r < 0) | |
272 | return log_error("Failed to build directory list: %m"); | |
273 | } | |
274 | ||
275 | r = conf_files_list_strv(&files, ".conf", NULL, 0, (const char* const*) dirs); | |
276 | if (r < 0) | |
277 | return log_error_errno(r, "Failed to query file list: %m"); | |
278 | ||
279 | name = strjoina("/etc/", name); | |
280 | ||
281 | if (DEBUG_LOGGING) { | |
282 | log_debug("Looking for configuration in:"); | |
283 | log_debug(" %s", name); | |
284 | STRV_FOREACH(t, dirs) | |
285 | log_debug(" %s/*.conf", *t); | |
286 | } | |
287 | ||
288 | /* show */ | |
289 | return cat_files(name, files, CAT_FLAGS_MAIN_FILE_OPTIONAL); | |
290 | } |