From owner-freebsd-current@FreeBSD.ORG  Mon Jun  9 15:49:15 2008
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 0D18F1065674;
	Mon,  9 Jun 2008 15:49:15 +0000 (UTC)
	(envelope-from luigi@onelab2.iet.unipi.it)
Received: from onelab2.iet.unipi.it (onelab2.iet.unipi.it [131.114.9.129])
	by mx1.freebsd.org (Postfix) with ESMTP id C85548FC19;
	Mon,  9 Jun 2008 15:49:14 +0000 (UTC)
	(envelope-from luigi@onelab2.iet.unipi.it)
Received: by onelab2.iet.unipi.it (Postfix, from userid 275)
	id 68E8B7308B; Mon,  9 Jun 2008 17:34:09 +0200 (CEST)
Date: Mon, 9 Jun 2008 17:34:09 +0200
From: Luigi Rizzo <rizzo@iet.unipi.it>
To: Ivan Voras <ivoras@freebsd.org>
Message-ID: <20080609153409.GB98621@onelab2.iet.unipi.it>
References: <20080609141441.GA5025@onelab2.iet.unipi.it>
	<g2jeii$3ht$1@ger.gmane.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <g2jeii$3ht$1@ger.gmane.org>
User-Agent: Mutt/1.4.2.3i
Cc: freebsd-current@freebsd.org
Subject: Re: any simple tool to extract files from an UFS image ?
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 09 Jun 2008 15:49:15 -0000

On Mon, Jun 09, 2008 at 04:26:26PM +0200, Ivan Voras wrote:
> Luigi Rizzo wrote:
> > Hi,
> > I am doing some work recently on small FreeBSD images (picobsd and friends),
> > and I need to run on a linux machine some script to customize
> > both the UFS and the ISO image.
> > 
> > Because the customization is just writing some text into a file,
> > my approach is to put in the UFS image a file with a recognizable
> > start and end markers, and then dd into the image the stuff I need.
> > 
> > I was wondering if i could avoid shipping both images, and instead
> > use some trick to extract the tree from the UFS image and then
> > use mkisofs on the linux side to build the ISO.
> > 
> > I know that bsdtar can read ISO images, but I don't think it does
> > the same on UFS. 
> 
> If I understand you correctly, you may try mounting the images in Linux,
> with suitably compiled kernel.

yes but that requires root privileges.
I try to avoid that even in FreeBSD (ni the picobsd script)
by using 'makefs'.

	cheers
	luigi