+ errno = 0;
+ if (nftw(fs, trim_cb, 64, FTW_DEPTH|FTW_MOUNT|FTW_PHYS) < 0)
+ r = errno ? -errno : -EIO;
+
+ if (delete_root) {
+ bool is_sticky;
+ char *p;
+
+ p = strappend(fs, "/tasks");
+ if (!p) {
+ free(fs);
+ return -ENOMEM;
+ }
+
+ is_sticky = file_is_sticky(p) > 0;
+ free(p);
+
+ if (!is_sticky)
+ if (rmdir(fs) < 0 && errno != ENOENT) {
+ if (r == 0)
+ r = -errno;
+ }
+ }
+