title: How do I get the list of all environment variables available in a Lisp process?
body: <p>I want to enumerate the list of all environment variables available in my Lisp process. I want the same list that is returned by the C variable <a href="http://man7.org/linux/man-pages/man7/environ.7.html" rel="nofollow noreferrer"><code>environ</code></a>.</p>
  
  <p>Neither SBCL nor Clozure CL seem to provide it out of the box. Can I do it using CFFI?</p>