What is the license of the PPT code? In particular, can I
re-use this:
    http://ppt.perl.org/commands/chmod/SymbolicMode.pm
in a GPL program?

-- 
``Computer games don't affect kids. I mean, if Pac-Man affected us as
  kids, we'd all be running around in darkened rooms, munching pills
  and listening to repetitive music.'' (Marcus Brigstocke)

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