sources can't support writing, all commands related to writing are stripped
    from the returned support bitmap.</p>
</section>
<section class="Ss">
<h2 class="Ss" id="ZIP_SOURCE_TELL"><a class="permalink" href="#ZIP_SOURCE_TELL"><code class="Dv">ZIP_SOURCE_TELL</code></a></h2>
<p class="Pp">The lower layer is not called automatically.</p>
</section>
</section>
<section class="Sh">
<h1 class="Sh" id="RETURN_VALUES"><a class="permalink" href="#RETURN_VALUES">RETURN
  VALUES</a></h1>
<p class="Pp">Upon succe