title: GNU CLISP: finding the modification time of a file
body: <p>I'm coding for GNU CLISP:</p>
  
  <pre><code>GNU CLISP 2.48 (2009-07-28)
  </code></pre>
  
  <p>I guess I have two questions:</p>
  
  <ol>
  <li><p>How do I find when a file was last modified, using CLISP's POSIX package?</p></li>
  <li><p>Where could I have looked to find this answer for myself?</p></li>
  </ol>