Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261698AbVDWSuh (ORCPT ); Sat, 23 Apr 2005 14:50:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261707AbVDWSuc (ORCPT ); Sat, 23 Apr 2005 14:50:32 -0400 Received: from smtpout.mac.com ([17.250.248.97]:50370 "EHLO smtpout.mac.com") by vger.kernel.org with ESMTP id S261698AbVDWSuH (ORCPT ); Sat, 23 Apr 2005 14:50:07 -0400 In-Reply-To: References: <4ae3c14050417085473bd365f@mail.gmail.com> Mime-Version: 1.0 (Apple Message framework v619.2) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <4a5cc1ac18788e708f9a5f3a5bd31be0@mac.com> Content-Transfer-Encoding: 7bit Cc: Xin Zhao , linux-kernel@vger.kernel.org From: Kyle Moffett Subject: Re: Why Ext2/3 needs immutable attribute? Date: Sat, 23 Apr 2005 14:49:59 -0400 To: dean gaudet X-Mailer: Apple Mail (2.619.2) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1284 Lines: 36 On Apr 23, 2005, at 12:50, dean gaudet wrote: > On Sun, 17 Apr 2005, 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. > > another usage: if you "chattr +i /var" while /var is unmounted, then > root > is unlikely to accidentally create files/dirs in /var -- and when you > mount the real /var on top it works fine. i tend to protect all my > mount > points this way (especially those in /mnt) to avoid my own dumb > mistakes. If you chmod 000 /var beforehand (While it's still unmounted, of course), then it's also blindingly obvious that it's not mounted in an ls -l :-D. I too have used this trick on many/most of my systems. Cheers, Kyle Moffett -----BEGIN GEEK CODE BLOCK----- Version: 3.12 GCM/CS/IT/U d- s++: a18 C++++>$ UB/L/X/*++++(+)>$ P+++(++++)>$ L++++(+++) E W++(+) N+++(++) o? K? w--- O? M++ V? PS+() PE+(-) Y+ PGP+++ t+(+++) 5 X R? tv-(--) b++++(++) DI+ D+ G e->++++$ h!*()>++$ r !y?(-) ------END GEEK CODE BLOCK------ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/