            </li>
              <li>
                <p>
                        <code class="literal">DB_EXCL</code>
                    </p>
                <p>
                        Return an <code class="literal">EEXIST</code> error if a
                        target backup file already exists.
                    </p>
              </li>
              <li>
                <p>
                        <code class="literal">DB_VERB_BACKUP</code>
                    </p>
                <p>
            