am I logged in locally?

[Glen Turner]

Shane wrote:
> does anyone have a nice way to test if a user is logged in locally /
> physically to a machine? ...at the moment linux only but preferably
> something that could be modified to also work on OS X too ..

Um, I think want you are actually trying to ask is if the user
logined in on a trusted TTY.

That is, is their *login* terminal in /etc/securetty.