xdr_setpos
if (xdr_setpos(&xdrm, pos + delta) == FALSE)
xdr_setpos(&xdrm, pos);
xdr_setpos(&xdrm, new_pos);
rc = xdr_setpos(xdrs, pos);
rc = xdr_setpos(xdrs, pos);
(void) xdr_setpos(&in_xdrs, 0);
(void) xdr_setpos(&out_xdrs, 0);
xdr_setpos(&xdrs, 0);
xdr_setpos(&xdrs, 0);