How can I get the command line arguments in (specifically in GNU, if there are any differences) Common Lisp?
http://cl-cookbook.sourceforge.net/os.html provides some insight
(defun my-command-line ()
(or
#+CLISP *args*
#+SBCL *posix-argv*
#+LISPWORKS system:*line-arguments-list*
#+CMU extensions:*command-line-words*
nil))
is what you are looking for, I think.