tracts the archive <code class="code">filename</code> into
    <code class="code">dirname</code>. <code class="code">dirname</code> should not exists and <code class="code">filename</code> should
    contain only one top-level directory.<br>
</div>

<pre><span id="VALextract_in"><span class="keyword">val</span> extract_in</span> : <code class="type">string -> string -> unit</code></pre><div class="info ">
<code class="code">extract_in filename dirname</code> extracts the archive <code class="code">filename<