fs_path_add
return fs_path_add(dest, tmp, len);
ret = fs_path_add(dest, nce->name, nce->name_len);
ret = fs_path_add(new_path, ref->name, ref->name_len);
ret = fs_path_add(ref->full_path, name, ref->name_len);
return fs_path_add(p, p2->start, fs_path_len(p2));