+ mode_t mode;
+ usec_t age;
+
+ bool uid_set:1;
+ bool gid_set:1;
+ bool mode_set:1;
+ bool age_set:1;
+} Item;
+
+static Hashmap *items = NULL;
+
+static bool arg_create = false;
+static bool arg_clean = false;
+static bool arg_remove = false;
+
+#define MAX_DEPTH 256
+
+static int dir_cleanup(
+ const char *p,
+ DIR *d,
+ const struct stat *ds,
+ usec_t cutoff,
+ dev_t rootdev,
+ bool mountpoint,
+ int maxdepth)
+{
+ struct dirent *dent;
+ struct timespec times[2];
+ bool deleted = false;
+ char *sub_path = NULL;
+ int r = 0;
+
+ while ((dent = readdir(d))) {
+ struct stat s;
+ usec_t age;
+
+ if (streq(dent->d_name, ".") ||
+ streq(dent->d_name, ".."))
+ continue;
+
+ if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) {
+
+ if (errno != ENOENT) {
+ log_error("stat(%s/%s) failed: %m", p, dent->d_name);
+ r = -errno;
+ }
+
+ continue;
+ }
+
+ /* Stay on the same filesystem */
+ if (s.st_dev != rootdev)
+ continue;
+
+ /* Do not delete read-only files owned by root */
+ if (s.st_uid == 0 && !(s.st_mode & S_IWUSR))
+ continue;
+
+ free(sub_path);
+ sub_path = NULL;
+
+ if (asprintf(&sub_path, "%s/%s", p, dent->d_name) < 0) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ /* Is there an item configured for this path? */
+ if (hashmap_get(items, sub_path))
+ continue;
+
+ if (S_ISDIR(s.st_mode)) {
+
+ if (mountpoint &&
+ streq(dent->d_name, "lost+found") &&
+ s.st_uid == 0)
+ continue;
+
+ if (maxdepth <= 0)
+ log_warning("Reached max depth on %s.", sub_path);
+ else {
+ DIR *sub_dir;
+ int q;
+
+ sub_dir = xopendirat(dirfd(d), dent->d_name, O_NOFOLLOW);
+ if (sub_dir == NULL) {
+ if (errno != ENOENT) {
+ log_error("opendir(%s/%s) failed: %m", p, dent->d_name);
+ r = -errno;
+ }
+
+ continue;
+ }
+
+ q = dir_cleanup(sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1);
+ closedir(sub_dir);
+
+ if (q < 0)
+ r = q;
+ }
+
+ /* Ignore ctime, we change it when deleting */
+ age = MAX(timespec_load(&s.st_mtim),
+ timespec_load(&s.st_atim));
+ if (age >= cutoff)
+ continue;
+
+ log_debug("rmdir '%s'\n", sub_path);
+
+ if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) {
+ if (errno != ENOENT && errno != ENOTEMPTY) {
+ log_error("rmdir(%s): %m", sub_path);
+ r = -errno;
+ }
+ }
+
+ } else {
+ /* Skip files for which the sticky bit is
+ * set. These are semantics we define, and are
+ * unknown elsewhere. See XDG_RUNTIME_DIR
+ * specification for details. */
+ if (s.st_mode & S_ISVTX)
+ continue;
+
+ if (mountpoint) {
+ if (streq(dent->d_name, ".journal") &&
+ s.st_uid == 0)
+ continue;
+
+ if (streq(dent->d_name, "aquota.user") ||
+ streq(dent->d_name, "aquota.group"))
+ continue;
+ }
+
+ age = MAX3(timespec_load(&s.st_mtim),
+ timespec_load(&s.st_atim),
+ timespec_load(&s.st_ctim));
+
+ if (age >= cutoff)
+ continue;
+
+ log_debug("unlink '%s'\n", sub_path);
+
+ if (unlinkat(dirfd(d), dent->d_name, 0) < 0) {
+ if (errno != ENOENT) {
+ log_error("unlink(%s): %m", sub_path);
+ r = -errno;
+ }
+ }
+
+ deleted = true;
+ }
+ }
+
+finish:
+ if (deleted) {
+ /* Restore original directory timestamps */
+ times[0] = ds->st_atim;
+ times[1] = ds->st_mtim;
+
+ if (futimens(dirfd(d), times) < 0)
+ log_error("utimensat(%s): %m", p);
+ }
+
+ free(sub_path);
+
+ return r;
+}
+
+static int clean_item(Item *i) {
+ DIR *d;
+ struct stat s, ps;
+ bool mountpoint;
+ int r;
+ usec_t cutoff, n;
+
+ assert(i);
+
+ if (i->type != CREATE_DIRECTORY &&
+ i->type != TRUNCATE_DIRECTORY &&
+ i->type != IGNORE_PATH)
+ return 0;
+
+ if (!i->age_set || i->age <= 0)
+ return 0;
+
+ n = now(CLOCK_REALTIME);
+ if (n < i->age)
+ return 0;
+
+ cutoff = n - i->age;
+
+ d = opendir(i->path);
+ if (!d) {
+ if (errno == ENOENT)
+ return 0;
+
+ log_error("Failed to open directory %s: %m", i->path);
+ return -errno;
+ }
+
+ if (fstat(dirfd(d), &s) < 0) {
+ log_error("stat(%s) failed: %m", i->path);
+ r = -errno;
+ goto finish;
+ }
+
+ if (!S_ISDIR(s.st_mode)) {
+ log_error("%s is not a directory.", i->path);
+ r = -ENOTDIR;
+ goto finish;
+ }
+
+ if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) {
+ log_error("stat(%s/..) failed: %m", i->path);
+ r = -errno;
+ goto finish;
+ }
+
+ mountpoint = s.st_dev != ps.st_dev ||
+ (s.st_dev == ps.st_dev && s.st_ino == ps.st_ino);
+
+ r = dir_cleanup(i->path, d, &s, cutoff, s.st_dev, mountpoint, MAX_DEPTH);
+
+finish:
+ if (d)
+ closedir(d);
+
+ return r;
+}
+
+static int create_item(Item *i) {
+ int fd = -1, r;
+ mode_t u;
+ struct stat st;
+
+ assert(i);
+
+ switch (i->type) {
+
+ case IGNORE_PATH:
+ case REMOVE_PATH:
+ case RECURSIVE_REMOVE_PATH:
+ return 0;
+
+ case CREATE_FILE:
+ case TRUNCATE_FILE:
+
+ u = umask(0);
+ fd = open(i->path, O_CREAT|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW|
+ (i->type == TRUNCATE_FILE ? O_TRUNC : 0), i->mode);
+ umask(u);
+
+ if (fd < 0) {
+ log_error("Failed to create file %s: %m", i->path);
+ r = -errno;
+ goto finish;
+ }
+
+ if (fstat(fd, &st) < 0) {
+ log_error("stat(%s) failed: %m", i->path);
+ r = -errno;
+ goto finish;
+ }
+
+ if (!S_ISREG(st.st_mode)) {
+ log_error("%s is not a file.", i->path);
+ r = -EEXIST;
+ goto finish;
+ }
+
+ if (i->mode_set)
+ if (fchmod(fd, i->mode) < 0) {
+ log_error("chmod(%s) failed: %m", i->path);
+ r = -errno;
+ goto finish;
+ }
+
+ if (i->uid_set || i->gid_set)
+ if (fchown(fd,
+ i->uid_set ? i->uid : (uid_t) -1,
+ i->gid_set ? i->gid : (gid_t) -1) < 0) {
+ log_error("chown(%s) failed: %m", i->path);
+ r = -errno;
+ goto finish;
+ }
+
+ break;
+
+ case TRUNCATE_DIRECTORY:
+ case CREATE_DIRECTORY:
+
+ u = umask(0);
+ r = mkdir(i->path, i->mode);
+ umask(u);
+
+ if (r < 0 && errno != EEXIST) {
+ log_error("Failed to create directory %s: %m", i->path);
+ r = -errno;
+ goto finish;
+ }
+
+ if (stat(i->path, &st) < 0) {
+ log_error("stat(%s) failed: %m", i->path);
+ r = -errno;
+ goto finish;
+ }
+
+ if (!S_ISDIR(st.st_mode)) {
+ log_error("%s is not a directory.", i->path);
+ r = -EEXIST;
+ goto finish;
+ }
+
+ if (i->mode_set)
+ if (chmod(i->path, i->mode) < 0) {
+ log_error("chmod(%s) failed: %m", i->path);
+ r = -errno;
+ goto finish;
+ }
+
+ if (i->uid_set || i->gid_set)
+ if (chown(i->path,
+ i->uid_set ? i->uid : (uid_t) -1,
+ i->gid_set ? i->gid : (gid_t) -1) < 0) {
+
+ log_error("chown(%s) failed: %m", i->path);
+ r = -errno;
+ goto finish;
+ }
+
+ break;
+ }
+
+ if ((r = label_fix(i->path)) < 0)
+ goto finish;
+
+ log_debug("%s created successfully.", i->path);
+
+finish:
+ if (fd >= 0)
+ close_nointr_nofail(fd);
+
+ return r;
+}
+
+static int remove_item(Item *i) {
+ int r;
+
+ assert(i);
+
+ switch (i->type) {
+
+ case CREATE_FILE:
+ case TRUNCATE_FILE:
+ case CREATE_DIRECTORY:
+ case IGNORE_PATH:
+ break;
+
+ case REMOVE_PATH:
+ if (remove(i->path) < 0 && errno != ENOENT) {
+ log_error("remove(%s): %m", i->path);
+ return -errno;
+ }
+
+ break;
+
+ case TRUNCATE_DIRECTORY:
+ case RECURSIVE_REMOVE_PATH:
+ if ((r = rm_rf(i->path, false, i->type == RECURSIVE_REMOVE_PATH)) < 0 &&
+ r != -ENOENT) {
+ log_error("rm_rf(%s): %s", i->path, strerror(-r));
+ return r;
+ }
+
+ break;
+ }
+
+ return 0;
+}
+
+static int process_item(Item *i) {
+ int r, q, p;
+
+ assert(i);
+
+ r = arg_create ? create_item(i) : 0;
+ q = arg_remove ? remove_item(i) : 0;
+ p = arg_clean ? clean_item(i) : 0;
+
+ if (r < 0)
+ return r;
+
+ if (q < 0)
+ return q;
+
+ return p;
+}
+
+static void item_free(Item *i) {
+ assert(i);
+
+ free(i->path);
+ free(i);
+}
+
+static int parse_line(const char *fname, unsigned line, const char *buffer, const char *prefix) {
+ Item *i;
+ char *mode = NULL, *user = NULL, *group = NULL, *age = NULL;
+ int r, n;