#include <db.h> int DB_ENV->get_tmp_dir(DB_ENV *dbenv, const char **dirp);
         The DB_ENV->get_tmp_dir() method returns the database environment
         temporary file directory.
    
         The DB_ENV->get_tmp_dir() method may be called at any time during the
         life of the application.
    
         The DB_ENV->get_tmp_dir() 
            
                  method returns a non-zero error value on failure and 0 on success.