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  <section id="shell-tricks">
<span id="ref-shell-tricks"></span><h1>Shell Tricks<a class="headerlink" href="#shell-tricks" title="Link to this heading">¶</a></h1>
<p>All the varnish programs can be invoked with the single
argument <code class="docutils literal notranslate"><span class="pre">--optstring</span></code> to request their <cite>getopt()</cite>
specification, which simplifies wrapper scripts:</p>
<div class="highlight-text notranslate"><div class="highlight"><pre><span></span>optstring=$(varnishfoo --optstring)

while getopts &quot;$optstring&quot; opt
do
    case $opt in
    n)
        # handle $OPTARG
        ;;
    # handle other options
    *)
        # ignore unneeded options
        ;;
    esac
done

varnishfoo &quot;$@&quot;

# do something with the options
</pre></div>
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