ong></span> parameter is non-NULL,
                          it must be set to non-0 if <span class="bold"><strong>path</strong></span> is a
                          directory, and 0 if <span class="bold"><strong>path</strong></span> is not a
                          directory.
                     </p>
          <p>
                          The <span class="bold"><strong>func_exists</strong></span> function must return
                          the value of <span class="bold"><strong>errno</strong></spa