(caddr_t) &res, 0, NULL);
(caddr_t) &res, 0, NULL, NULL);
nis_mkdir (const_nis_name dir, const nis_server *server){  nis_error res, res2;  if (server == NULL)    res2 = __do_niscall (dir, NIS_MKDIR, (xdrproc_t) xdr_nis_name,			 (caddr_t) &dir, (xdrproc_t) xdr_nis_error,			 (caddr_t) &res, 0, NULL);  else    res2 = __do_niscall2 (server, 1, NIS_MKDIR,			  (xdrproc_t) xdr_nis_name,			  (caddr_t) &dir, (xdrproc_t) xdr_nis_error,			  (caddr_t) &res, 0, NULL);  if (res2 != NIS_SUCCESS)    return res2;  return res;}