db_map_open
return db_map_open(map, mode, "btree", DB_BTREE, &btinfo);
return db_map_open(map, mode, "hash", DB_HASH, &hinfo);
static bool db_map_open __P((MAP *, int, char *, DBTYPE, const void *));
static bool db_map_open __P((MAP *, int, char *, DBTYPE, DB_INFO *));
static bool db_map_open __P((MAP *, int, char *, DBTYPE, void **));