ified (see below). This pointer should not be modified or
    <a class="Xr" href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/free.html">free(3)</a>'d, and becomes invalid when
    <var class="Ar">archive</var> is closed. If <var class="Ar">lenp</var> is
    not <code class="Dv">NULL</code>, the integer to which it points will be set
    to the length of the comment. If <var class="Ar">flags</var> is set to
    <code class="Dv">ZIP_FL_UNCHANGED</code>, the original unchanged comment is
    ret