map_set
ans = map_set(&rpcbreg, rpcbreg.r_owner);
*result = map_set(regp, getowner(rqstp->rq_xprt, owner));
bool_t map_set(RPCB *, char *);
map_set(P, mptr, "a.out");
map_set(P, mptr, "ld.so.1");