Date: Sun, 17 Apr 2005 18:03:06 +0200
From: Willy Tarreau <willy@w.ods.org>
To: Xin Zhao <uszhaoxin@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Why Ext2/3 needs immutable attribute?
Message-ID: <20050417160306.GB777@alpha.home.local>
References: <4ae3c14050417085473bd365f@mail.gmail.com>
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On Sun, Apr 17, 2005 at 11:54:34AM -0400, Xin Zhao wrote:
> Why not simply unset the write bit for all three groups of users? 
> That seems to be enough to prevent file modification.
> 
> Immutable seems to only add one more protection level in case of
> misconfiguration on standard access right bits.  Is that right?

With immutable, even root cannot modify the file accidentely. It is
very useful for critical configuration files.

Willy

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