[colug-432] best ID function

Rick Troth rmt at casita.net
Mon May 13 11:58:48 EDT 2013

There must be two dozen ways to extract the username.
I've coded two or three in the past.  Before I do it again, what would
y'all recommend?

In this case, I need the username, not the UID.
I'm writing a jail that will run another program for which the
username is one of the arguments.

-- R;   <><

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