xdr_mon_id
extern bool_t xdr_mon_id(XDR *, mon_id*);
if (!xdr_mon_id(xdrs, &objp->mon_id))
(xdrproc_t)xdr_mon_id, &smon_id,
if (clnt_call(clnt, SM_UNMON, (xdrproc_t)xdr_mon_id, argp,