From: Miguel <turtle.power@wanadoo.es>
To: Alexy Khrabrov <list+reiserfs@setup.org>
Cc: ReiserFS List <reiserfs-list@namesys.com>
Subject: Re: immutability
Date: Sun, 30 May 2004 20:16:16 +0200 [thread overview]
Message-ID: <20040530201616.5ba654ba.turtle.power@wanadoo.es> (raw)
In-Reply-To: <20040529152153.GA20663%alexy.khrabrov@setup.org>
On Sat, 29 May 2004 11:21:54 -0400
Alexy Khrabrov <list+reiserfs@setup.org> wrote:
>
> About immutability...
>
> Now I have to confess, I've deleted those two files while trying to
> make them immutable whith chattr. I didn't realize it applies to
> ext2/3 filesystems, and lsattr did show ..-i-... Seeing i, I did rm,
> and there they went. On the good side, I know what to do now if I
> accidentally delete a file on Linux, which is no small feat -- for
> years, I just thought, forget it. Unix approach to recovery was, and
> still is,"backup", and if you didn't, you're an idiot whose files are
> not worth recovery anyway. :) Undoing an rm on Linux is a deeply
> vindicating experience :). I wonder what v4 offers in that area. And
> even with the current routine, as can be easily seen, there could be
> automated assembly scripts.
Yes but backup is a bit annoyning when you need to recover just a few
files, I'm using a procedure on my machines to restore recently deleted
files (24h).
Firt you need libtrash (http://www.m-arriaga.net/software/libtrash/)
which intercepts some system calls when you try to delete a file and mv
those files to a special directory.
Then tmpreaper cleans the "trash" directory deleting old files when
atime > 24h in my case.
(http://packages.debian.org/unstable/admin/tmpreaper)
it's easy and 100% userspace.
>
> So, just to confirm -- is there chattr or a similar way to make files
> immutable? I use a RAID to store digital photographs, running LVM on
> top of it consisting of the RAID physical volume only, and reiserfs in
> the logical volume spanning the only volume group spanning the RAID.
> The idea was, I'll just get those logical extents I need in case I
> need a used part of it -- here I'd need help from reiserfs's bitmap,
> still have to figure that out, that's what my original "partial dd"
> question was about. I'd like to make the files "write once" via some
> kind of automated process. Is there any way simpler than remounting
> the thing read-only after each write from a CF card?
>
> --
> Cheers,
> Alexy Khrabrov :: www.setup.org :: Age Quod Agis
>
--
La resistencia es fútil todos seréis asimilados
next prev parent reply other threads:[~2004-05-30 18:16 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-29 15:21 immutability Alexy Khrabrov
2004-05-30 18:16 ` Miguel [this message]
2004-06-05 14:31 ` immutability Sander
2004-06-05 14:57 ` immutability Miguel
2004-05-30 19:13 ` immutability mjt
2004-05-31 7:40 ` immutability Vladimir Saveliev
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