From owner-freebsd-questions@FreeBSD.ORG  Mon Oct 22 18:49:34 2007
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From: Chuck Swiger <cswiger@mac.com>
Date: Mon, 22 Oct 2007 11:41:38 -0700
To: Mayank Jain <mayank@in.niksun.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: su: not running setuid
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On Oct 22, 2007, at 11:51 AM, Mayank Jain wrote:
> I have run chown -R uname:wheel . as root in the / directory. Now  
> it is not
> allowing me to log in as su.
> Giving the following error

Ouch-- you've managed to reset the setuid/setgid bits for the entire  
system.

You'll probably need to do a buildworld/installworld cycle or a  
reinstall to get this fixed.

-- 
-Chuck