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From: Keith Owens <kaos@ocs.com.au>
To: Matthew Dharm <mdharm-kernel@one-eyed-alien.net>
cc: Kernel Developer List <linux-kernel@vger.kernel.org>
Subject: Re: using mount from SUID scripts? 
In-Reply-To: Your message of "Tue, 07 Aug 2001 16:29:39 MST."
             <20010807162939.A26249@one-eyed-alien.net> 
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Date: Wed, 08 Aug 2001 11:12:53 +1000
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On Tue, 7 Aug 2001 16:29:39 -0700, 
Matthew Dharm <mdharm-kernel@one-eyed-alien.net> wrote:
>I've got an SUID perl script (yes, it's EUID is really 0) which I'd like to
>use mount from to mount a file via loopback...
>
>Unfortunately, it looks like mount refuses to actually mount anything if
>the EUID and UID aren't the same....

Are you sure the problem is mount?  Some versions of bash drop euid(0)
when they execute scripts from setuid programs.