#include <db.h>

int
DB_ENV->get_create_dir(DB_ENV *dbenv, const char **dirp);  

The DB_ENV->get_create_dir() method returns a pointer to the name of the directory to create databases in.

The DB_ENV->get_create_dir() method may be called at any time during the life of the application.

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