yp_master
int yp_master(char *indomain, char *inmap, char **outname);
if (yp_master(domain, "passwd.byname", &server))
if ((rval = yp_master(domain, map, &master)))
r = yp_master(ypclnt->domain, ypclnt->map, &ypclnt->server);
if ((res = yp_master(domain, map, &master))) {
r = yp_master(domain, map, &master);
r = yp_master(domain, ypml->map, &master);
r = yp_master(domainname, inmap, &master);