#include <db.h> int DB_ENV->get_home(DB_ENV *dbenv, const char **homep);
         The DB_ENV->get_home() method returns the database environment home
         directory. This directory is normally identified when the
         DB_ENV->open()
         method is called.
    
         The DB_ENV->get_home() method may be called at any time during the
         life of the application.
    
         The DB_ENV->get_home() 
            
                  method returns a non-zero error value on failure and 0 on success.