What it says on the tin.
When the system (without logging into X) detects a change in internet accessibility, I'd like to set a hook to execute a script.
EDIT: Every single bloody time... So, dhcpcd-run-hooks exists... is that the preferred method or can anyone recommend something else that's - in their mind - better?
2nd EDIT: I really am asking these questions. It's just that, in the process of writing the posts, I think of a different way to google the question and the answer magically appears.