In my head I was expecting that there was some POSIX function that, after changing the uid, would set the groups for you. It's non-intuitive to me to not see the groups change automatically after setting the real uid.

Thank you both for setting me on the right path.

In reply to Re: Using setuid() and absorbing that user's groups by Chagrin
in thread Using setuid() and absorbing that user's groups by Chagrin

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