1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2010 Lennart Poettering
15 #include "conf-files.h"
17 #include "dirent-util.h"
23 #include "path-util.h"
25 #include "stat-util.h"
26 #include "string-util.h"
28 //#include "terminal-util.h"
39 _cleanup_closedir_ DIR *dir = NULL;
45 assert((flags & CONF_FILES_FILTER_MASKED) == 0 || masked);
48 dirpath = prefix_roota(root, path);
50 dir = opendir(dirpath);
55 return log_debug_errno(errno, "Failed to open directory '%s': %m", dirpath);
58 FOREACH_DIRENT(de, dir, return -errno) {
62 /* Does this match the suffix? */
63 if (suffix && !endswith(de->d_name, suffix))
66 /* Has this file already been found in an earlier directory? */
67 if (hashmap_contains(h, de->d_name)) {
68 log_debug("Skipping overridden file '%s/%s'.", dirpath, de->d_name);
72 /* Has this been masked in an earlier directory? */
73 if ((flags & CONF_FILES_FILTER_MASKED) && set_contains(masked, de->d_name)) {
74 log_debug("File '%s/%s' is masked by previous entry.", dirpath, de->d_name);
78 /* Read file metadata if we shall validate the check for file masks, for node types or whether the node is marked executable. */
79 if (flags & (CONF_FILES_FILTER_MASKED|CONF_FILES_REGULAR|CONF_FILES_DIRECTORY|CONF_FILES_EXECUTABLE))
80 if (fstatat(dirfd(dir), de->d_name, &st, 0) < 0) {
81 log_debug_errno(errno, "Failed to stat '%s/%s', ignoring: %m", dirpath, de->d_name);
85 /* Is this a masking entry? */
86 if ((flags & CONF_FILES_FILTER_MASKED))
87 if (null_or_empty(&st)) {
88 /* Mark this one as masked */
89 r = set_put_strdup(masked, de->d_name);
93 log_debug("File '%s/%s' is a mask.", dirpath, de->d_name);
97 /* Does this node have the right type? */
98 if (flags & (CONF_FILES_REGULAR|CONF_FILES_DIRECTORY))
99 if (!((flags & CONF_FILES_DIRECTORY) && S_ISDIR(st.st_mode)) &&
100 !((flags & CONF_FILES_REGULAR) && S_ISREG(st.st_mode))) {
101 log_debug("Ignoring '%s/%s', as it is not a of the right type.", dirpath, de->d_name);
105 /* Does this node have the executable bit set? */
106 if (flags & CONF_FILES_EXECUTABLE)
107 /* As requested: check if the file is marked exectuable. Note that we don't check access(X_OK)
108 * here, as we care about whether the file is marked executable at all, and not whether it is
109 * executable for us, because if so, such errors are stuff we should log about. */
111 if ((st.st_mode & 0111) == 0) { /* not executable */
112 log_debug("Ignoring '%s/%s', as it is not marked executable.", dirpath, de->d_name);
116 if (flags & CONF_FILES_BASENAME) {
117 p = strdup(de->d_name);
123 p = strjoin(dirpath, "/", de->d_name);
130 r = hashmap_put(h, key, p);
133 return log_debug_errno(r, "Failed to add item to hashmap: %m");
142 static int base_cmp(const void *a, const void *b) {
145 s1 = *(char * const *)a;
146 s2 = *(char * const *)b;
147 return strcmp(basename(s1), basename(s2));
150 static int conf_files_list_strv_internal(char ***strv, const char *suffix, const char *root, unsigned flags, char **dirs) {
151 _cleanup_hashmap_free_ Hashmap *fh = NULL;
152 _cleanup_set_free_free_ Set *masked = NULL;
158 /* This alters the dirs string array */
159 if (!path_strv_resolve_uniq(dirs, root))
162 fh = hashmap_new(&path_hash_ops);
166 if (flags & CONF_FILES_FILTER_MASKED) {
167 masked = set_new(&path_hash_ops);
172 STRV_FOREACH(p, dirs) {
173 r = files_add(fh, masked, suffix, root, flags, *p);
177 log_debug_errno(r, "Failed to search for files in %s, ignoring: %m", *p);
180 files = hashmap_get_strv(fh);
184 qsort_safe(files, hashmap_size(fh), sizeof(char *), base_cmp);
190 int conf_files_insert(char ***strv, const char *root, char **dirs, const char *path) {
191 /* Insert a path into strv, at the place honouring the usual sorting rules:
192 * - we first compare by the basename
193 * - and then we compare by dirname, allowing just one file with the given
195 * This means that we will
196 * - add a new entry if basename(path) was not on the list,
197 * - do nothing if an entry with higher priority was already present,
198 * - do nothing if our new entry matches the existing entry,
199 * - replace the existing entry if our new entry has higher priority.
205 for (i = 0; i < strv_length(*strv); i++) {
208 c = base_cmp(*strv + i, &path);
212 /* Oh, we found our spot and it already contains something. */
213 STRV_FOREACH(dir, dirs) {
216 p1 = path_startswith((*strv)[i], root);
218 /* Skip "/" in *dir, because p1 is without "/" too */
219 p1 = path_startswith(p1, *dir + 1);
221 /* Existing entry with higher priority
222 * or same priority, no need to do anything. */
225 p2 = path_startswith(path, *dir);
227 /* Our new entry has higher priority */
228 t = path_join(root, path, NULL);
232 return free_and_replace((*strv)[i], t);
237 /* Following files have lower priority, let's go insert our
241 /* … we are not there yet, let's continue */
244 t = path_join(root, path, NULL);
248 r = strv_insert(strv, i, t);
254 int conf_files_insert_nulstr(char ***strv, const char *root, const char *dirs, const char *path) {
255 _cleanup_strv_free_ char **d = NULL;
259 d = strv_split_nulstr(dirs);
263 return conf_files_insert(strv, root, d, path);
266 int conf_files_list_strv(char ***strv, const char *suffix, const char *root, unsigned flags, const char* const* dirs) {
267 _cleanup_strv_free_ char **copy = NULL;
271 copy = strv_copy((char**) dirs);
275 return conf_files_list_strv_internal(strv, suffix, root, flags, copy);
278 int conf_files_list(char ***strv, const char *suffix, const char *root, unsigned flags, const char *dir, ...) {
279 _cleanup_strv_free_ char **dirs = NULL;
285 dirs = strv_new_ap(dir, ap);
291 return conf_files_list_strv_internal(strv, suffix, root, flags, dirs);
294 int conf_files_list_nulstr(char ***strv, const char *suffix, const char *root, unsigned flags, const char *dirs) {
295 _cleanup_strv_free_ char **d = NULL;
299 d = strv_split_nulstr(dirs);
303 return conf_files_list_strv_internal(strv, suffix, root, flags, d);
306 int conf_files_list_with_replacement(
309 const char *replacement,
311 char **replace_file) {
313 _cleanup_strv_free_ char **f = NULL;
314 _cleanup_free_ char *p = NULL;
319 assert(replace_file || !replacement);
321 r = conf_files_list_strv(&f, ".conf", root, 0, (const char* const*) config_dirs);
323 return log_error_errno(r, "Failed to enumerate config files: %m");
326 r = conf_files_insert(&f, root, config_dirs, replacement);
328 return log_error_errno(r, "Failed to extend config file list: %m");
330 p = path_join(root, replacement, NULL);
335 *files = TAKE_PTR(f);
337 *replace_file = TAKE_PTR(p);
341 int conf_files_cat(const char *root, const char *name) {
342 _cleanup_strv_free_ char **dirs = NULL, **files = NULL;
343 _cleanup_free_ char *path = NULL;
348 NULSTR_FOREACH(dir, CONF_PATHS_NULSTR("")) {
349 assert(endswith(dir, "/"));
350 r = strv_extendf(&dirs, "%s%s.d", dir, name);
352 return log_error_errno(r, "Failed to build directory list: %m");
355 r = conf_files_list_strv(&files, ".conf", root, 0, (const char* const*) dirs);
357 return log_error_errno(r, "Failed to query file list: %m");
359 path = path_join(root, "/etc", name);
364 log_debug("Looking for configuration in:");
365 log_debug(" %s", path);
366 STRV_FOREACH(t, dirs)
367 log_debug(" %s/*.conf", *t);
371 return cat_files(path, files, CAT_FLAGS_MAIN_FILE_OPTIONAL);