yp_next_record
while (yp_next_record(dbp, &key, &data, 1, 1) == YP_TRUE)
rval = yp_next_record(yp_currmap_db, &db_key, &db_val, 0, yp_allow_db);
extern int yp_next_record(const DB *, DBT *, DBT *, int, int);