nfs_map_numeric_to_string
id_len = nfs_map_numeric_to_string(id, id_str, sizeof(id_str));
len = 1 + nfs_map_numeric_to_string(im->im_id, id_str,
ret = nfs_map_numeric_to_string(id, buf, buflen);
ret = nfs_map_numeric_to_string(id, buf, buflen);