="code"><span class="constructor">Open_append</span></code>, <code class="code"><span class="constructor">Open_binary</span></code>,
   and <code class="code"><span class="constructor">Open_text</span></code>.  The default is <code class="code">[<span class="constructor">Open_text</span>]</code> (open in text mode). The
   file is created with permissions <code class="code">perms</code> (defaults to readable and
   writable only by the file owner, <code class="code">0o600</code>).<br>
<b>Before 4.03.0 </b> 