int null_or_empty_path(const char *fn) {
struct stat st;
assert(fn);
if (stat(fn, &st) < 0)
return -errno;
return null_or_empty(&st);
}
int null_or_empty_fd(int fd) {
struct stat st;
assert(fd >= 0);
if (fstat(fd, &st) < 0)
return -errno;
return null_or_empty(&st);
}
static int files_add(
Hashmap *h,
Set *masked,
const char *suffix,
const char *root,
unsigned flags,
const char *path) {
_cleanup_closedir_ DIR *dir = NULL;
const char *dirpath;
struct dirent *de;
int r;
assert(h);
assert((flags & CONF_FILES_FILTER_MASKED) == 0 || masked);
assert(path);
dirpath = prefix_roota(root, path);
dir = opendir(dirpath);
if (!dir) {
if (errno == ENOENT)
return 0;
return log_debug_errno(errno, "Failed to open directory '%s': %m", dirpath);
}
FOREACH_DIRENT(de, dir, return -errno) {
struct stat st;
char *p, *key;
/* Does this match the suffix? */
if (suffix && !endswith(de->d_name, suffix))
continue;
/* Has this file already been found in an earlier directory? */
if (hashmap_contains(h, de->d_name)) {
log_debug("Skipping overridden file '%s/%s'.", dirpath, de->d_name);
continue;
}
/* Has this been masked in an earlier directory? */
if ((flags & CONF_FILES_FILTER_MASKED) && set_contains(masked, de->d_name)) {
log_debug("File '%s/%s' is masked by previous entry.", dirpath, de->d_name);
continue;
}
/* Read file metadata if we shall validate the check for file masks, for node types or whether the node is marked executable. */
if (flags & (CONF_FILES_FILTER_MASKED|CONF_FILES_REGULAR|CONF_FILES_DIRECTORY|CONF_FILES_EXECUTABLE))
if (fstatat(dirfd(dir), de->d_name, &st, 0) < 0) {
log_debug_errno(errno, "Failed to stat '%s/%s', ignoring: %m", dirpath, de->d_name);
continue;
}
/* Is this a masking entry? */
if ((flags & CONF_FILES_FILTER_MASKED))
if (null_or_empty(&st)) {
/* Mark this one as masked */
r = set_put_strdup(masked, de->d_name);
if (r < 0)
return r;
log_debug("File '%s/%s' is a mask.", dirpath, de->d_name);
continue;
}
/* Does this node have the right type? */
if (flags & (CONF_FILES_REGULAR|CONF_FILES_DIRECTORY))
if (!((flags & CONF_FILES_DIRECTORY) && S_ISDIR(st.st_mode)) &&
!((flags & CONF_FILES_REGULAR) && S_ISREG(st.st_mode))) {
log_debug("Ignoring '%s/%s', as it is not a of the right type.", dirpath, de->d_name);
continue;
}
/* Does this node have the executable bit set? */
if (flags & CONF_FILES_EXECUTABLE)
/* As requested: check if the file is marked exectuable. Note that we don't check access(X_OK)
* here, as we care about whether the file is marked executable at all, and not whether it is
* executable for us, because if so, such errors are stuff we should log about. */
if ((st.st_mode & 0111) == 0) { /* not executable */
log_debug("Ignoring '%s/%s', as it is not marked executable.", dirpath, de->d_name);
continue;
}
if (flags & CONF_FILES_BASENAME) {
p = strdup(de->d_name);
if (!p)
return -ENOMEM;
key = p;
} else {
p = strjoin(dirpath, "/", de->d_name);
if (!p)
return -ENOMEM;
key = basename(p);
}
r = hashmap_put(h, key, p);
if (r < 0) {
free(p);
return log_debug_errno(r, "Failed to add item to hashmap: %m");
}
assert(r > 0);
}
return 0;
}