ss="hdlist1"><code>OPT_MAGNITUDE(short, long, &amp;unsigned_long_var, description)</code></dt>
<dd>
<p>Introduce an option with a size argument. The argument must be a
non-negative integer and may include a suffix of <em>k</em>, <em>m</em> or <em>g</em> to
scale the provided value by 1024, 1024^2 or 1024^3 respectively.
The scaled value is put into <code>unsigned_long_var</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT_EXPIRY_DATE(short, long, &amp;timestamp_t_var, description)</code></dt>
<dd>
<p>Introduce