if err != nil {
		return false
	}

	// If the directory has a different device as parent, then it is a mountpoint.
	ss1, ok1 := s1.Sys().(*syscall.Stat_t)
	ss2, ok2 := s2.Sys().(*syscall.Stat_t)
	return ok1 && ok2 &&
		// path/.. on a different device as path
		(ss1.Dev != ss2.Dev ||
			// path/.. is the same i-node as path - this check is for bind mounts.
			ss1.Ino == ss2.Ino)
}