Ad-Infinitum

• Don't loop endlessly for input
• After two attempts use a default or bail out
• Don't loop endlessly when system commands fail
• Check that results don't include a 'usage' type string
• Some options are not supported on all OSs

Alternatives

• Ask the user
• Look for ENV settings
• Look for command line settings and/or arguments
• Use defaults and skip if you fail to connect.

Check Environment

• CPAN::YACSmoke - $ENV{AUTOMATED_TESTING} == 1
• cpansmoke - $ENV{VISUAL} eq 'echo'