title: Have kafkacat produce both name of a file and its contents
body: <p>I want <code>kafkacat</code> to write both the name of a file and its contents in a single <code>bash</code> command, if possible. The following apparently does not work. What am I missing?</p>
  <pre><code>kafkacat -T -P -b ... -t ... &lt;(echo $file) $file
  </code></pre>