As it appears you're on a *NIX box. Aside from poll. The man pages for ifconfig, lsof, netstat, etc. Might give you some interesting information, that you could ask Perl to provide you in informative, and useful ways. :)

HTH

--Chris

#!/usr/bin/perl -Tw
use Perl::Always or die;
my $perl_version = (5.12.5);
print $perl_version;