From owner-freebsd-hackers  Fri Aug  2 14:20:56 1996
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To: freebsd-hackers@FreeBSD.ORG
From: pius@ienet.com
Subject: su question
Date: Fri, 02 Aug 1996 14:20:09 -0700
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Just out of curiosity,

when someone does an su to root, why does su check that the
username is explicitly listed as a member of group 0 in /etc/group
instead of just making sure that the user is part of that group
with getgroups(2)? In other words, why should a user with a group
ID of 0 in /etc/passwd also have to be listed as a member of wheel
in /etc/group in order to su to root?

Thanks,
Pius