set[gu]id

[utzoo!decvax!ucbvax!unix-wizards]

>From sdcarl!rusty at Berkeley Thu Sep 17 15:09:26 1981
A "solution" would be to remove this stupid code from the
kernel and fix /bin/mail since that is where the bug is.
As was demonstrated by the person from purdue no amount of
turning off the set[gu]id bits was sufficient protection but
a simple fix to /bin/mail not involving the set[gu]id bits
fixed the bugger.