While I was suffering the interwebs my eyes caught a perl script which prints out the environment variables. For example something like this.
use CGI; $cgi = new CGI; for $key ( $cgi->param() ) { $input{$key} = $cgi->param($key); } print qq{Content-type: text/html <html><head></head><body> }; foreach $key (sort (keys %ENV)) { print $key, ' = ', $ENV{$key}, "<br>\n"; } for $key ( keys %input ) { print $key, ' = ', $input{$key}, "<br>\n"; } print qq{<form METHOD=POST><input type="submit" value="Post Request"> <input name="postfield"></form>}; print qq{<form METHOD=GET ><input type="submit" value="Get Request "> <input name="getfield" ></form>}; print qq{</body></html>};