#include <db_cxx.h> int DbEnv::get_lg_dir(const char **dirp);
            The DbEnv::get_lg_dir() method returns the log directory, which is the location for
            logging files. You can manage this value using the
            DbEnv::set_lg_dir()
            method. 
    
         The DbEnv::get_lg_dir() method may be called at any time during the
         life of the application.
    
         The DbEnv::get_lg_dir() 
            
            
                method either returns a non-zero error value or throws an
                exception that encapsulates a non-zero error value on
                failure, and returns 0 on success.