#include <db_cxx.h> int Db::get_re_source(const char **sourcep);
        The Db::get_re_source() method returns the source file used by the
        Recno access method. This file is configured for the Recno access
        method using the
        Db::set_re_source()
        method.
    
         The Db::get_re_source() method may be
         called only after the database has been opened.
    
         The Db::get_re_source() 
            
            
                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.