#include <db.h>

int
DB->get_type(DB *db, DBTYPE *type);  

The DB->get_type() method returns the type of the underlying access method (and file format). The type value is one of DB_BTREE, DB_HASH, DB_RECNO, or DB_QUEUE. This value may be used to determine the type of the database after a return from DB->open() with the type parameter set to DB_UNKNOWN.

The DB->get_type() method may not be called before the DB->open() method is called.

The DB->get_type() method returns a non-zero error value on failure and 0 on success.