Thanks, yes, so in #2 POSIX isn't loaded, so perl -e 'print POSIX::cuserid' should return nothing, actually. That's the answer. There is something odd about this user's environment that is causing it to print his username. In *my* environment, and root's, it behaves the way it is supposed to. Not going to investigate further.

In reply to Re^2: Diff between 'print POSIX::cuserid' and 'use POSIX; print cuserid' by wsanders
in thread Diff between 'print POSIX::cuserid' and 'use POSIX; print cuserid' by wsanders

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