linux-kernel - Re: Intercepting system calls

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 28 Dec 2011 13:56:31 +0100
From:	Wojciech Zygmunt Porczyk <wojciech@...czyk.eu>
To:	Gaurav Saxena <grvsaxena419@...il.com>
Cc:	John Stoffel <john@...ffel.org>,
	richard -rw- weinberger <richard.weinberger@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Intercepting system calls

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Fri, Dec 23, 2011 at 10:33:45PM +0530, Gaurav Saxena wrote:
> I am trying to write an application which would create a backup for
> the system so that it could be restored as it is. For example I create
> a backup using my application. I just do nothing at time of backup so
> it would be fast. Now whenever I see any deletion I would save that
> file so that I could restore it.

You almost certainly wan't to research LVM(-like) snapshots. They are
operating in block layer, so you can restore fs "as it was", with COW
feature they do "nothing" at creation and just save overwritten data
somewhere else.

See: lvcreate(8), xfs_freeze(8). Maybe btrfs(8) ("btrfs subvolume
snapshot") but btrfs is not really production-ready, so get lvm2+xfs.

- -- 
regards
WZJP
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.18 (GNU/Linux)

iEYEARECAAYFAk77Ef8ACgkQDgvLOJe6jMmQuACfassIV+vXCTmvMCTUqa81wgFf
lBcAoLwYdPf59FEJ7sl/lzyHLLo4pG2r
=Zt0G
-----END PGP SIGNATURE-----
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/