"btw: No Term::ReadKey"

Why?

Are you on a platform on which it doesn't work? Is there some rule from management that bans using software written elsewhere (in which case, how would one use Perl at all?)? Is Term::ReadKey conflicting with some other part of your project? Does requiring the module put you over some storage limit? Are you unaware that CPAN modules can be installed without a superuser account? Does the test suite fail some criterion of yours?

It's not quite fair to a community that has provided you a working solution and tons of advice on how to use the publicly available tools on CPAN to just dismiss a module out of hand without giving a reason. If you have a reason not to use a CPAN module, please have the respect for those reading the thread to state it. That way we can avoid guessing at your issue and get right to either solving it or working around it.