Date: Thu, 28 Dec 2006 13:28:44 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: freebsd-hackers@freebsd.org, erik.udo@gmail.com, olli@lurza.secnetix.de Subject: Re: Init.c, making it chroot Message-ID: <20061228.132844.-579333856.imp@bsdimp.com> In-Reply-To: <200612281237.kBSCbE2n047391@lurza.secnetix.de> References: <4592C91C.2040801@gmail.com> <200612281237.kBSCbE2n047391@lurza.secnetix.de>
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In message: <200612281237.kBSCbE2n047391@lurza.secnetix.de>
Oliver Fromme <olli@lurza.secnetix.de> writes:
: Erik Udo wrote:
: > How can i make init chroot after executing /etc/rc, and executing
: > /etc/rc again in the chrooted enviroment?
: >
: > For this to work, i'd like to know at what point do i call chroot(),
: > becouse init.c uses fork() at the point where it runs the rc script.
: >
: > The thing is, i want to run a whole system in a chrooted enviroment in
: > this livecd i'm making. But the command "chroot /mnt/root /etc/rc"
: > returns after the /etc/rc has been run, dropping me back from the
: > chrooted enviroment. And if it doesn't, init never starts the multiuser
: > mode.
:
: That's exactly the problem I had when I created a combined
: DVD-ROM with FreeBSD and DragonFly BSD on it. For them to
: share the same ISO-9660, at least one of them needed to be
: chrooted. I decided to add the feature to DragonFly BSD's
: init(8) because the DragonFly people seemed to be easier to
: convince of the usefulness. ;-) Indeed, the feature was
: committed quickly. I didn't try to send-pr a similar patch
: for FreeBSD.
You do the FreeBSD developer community a disservice with this
attitude. We've been talking about needing something like this for a
while.
: It shouldn't be too difficult to port it, though:
:
: http://www.dragonflybsd.org/cvsweb/src/sbin/init/init.c
:
: The chroot() patch has been committed with r1.6. It uses
: kenv to specify the chroot directory, so it can easily be
: set by the loader(8), e.g. using a custom boot menu.
:
: Best regards
: Oliver
:
: PS: I see NetBSD has a similar feature, too. Maybe
: FreeBSD should join the crowd and adopt it. ;-)
Please, don't come into the FreeBSD forums and talk trash on FreeBSD
when you've not even tried to get a change into the base system.
Warner
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