in reply to Exporting functions into main namespace for the benefit of other use'd modules
If you are really going to 'globally expose'(1) utility functions this way, then you should at least give some thought to the names, and get_id() is just about as bad as it gets.
(1) Which seems to be your intention, though as halley pointed out the definition of global is somewhat limited.
What id is that? A file identifer? A personnel identifier? A user identifier? A group identifier? A rabbit identifier? Is Idaho up for sale? Your program is a step in your quest for world-domination and your starting with Indonesia?
Or maybe the problem you are solving needs a little Freudian help, and some impulsive behaviour?
And is that get a new one? The old one? The only one? The current one? The next one?
Once you have addressed those questions, your likely to end up with a sub called retreive_current_effective_user_id_for_this_process();, but then that would probably be more easlily written as Process::Current::user_id(); (season with get/put, or get/set to taste).
"When I'm working on a problem, I never think about beauty. I think only how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong." -Richard Buckminster Fuller