[Libguestfs] [PATCH 1/3] febootstrap/helper/init: make sure /proc is mounted into chroot.

Richard W.M. Jones rjones at redhat.com
Wed Jun 8 08:28:49 UTC 2011

On Tue, Jun 07, 2011 at 06:57:12PM +0100, Richard W.M. Jones wrote:
> On Tue, Jun 07, 2011 at 06:04:42PM +0200, Hilko Bengen wrote:
> > * Richard W.M. Jones:
> > 
> > >> It should be easy to implement this in a few mount(2)
> > >> calls as part of febootstrap's /init. One could even use #ifdefs to cope
> > >> with slightly different behavior across distributions.
> > >
> > > The problem is that we'll end up with complex conditional C code, when
> > > really this is better and easier done in the shell script.  The code
> > > will also be different for every distro.
> > 
> > Is a small size the only reason why you have written febootstrap's /init
> > in C with as few external dependencies as possible?
> > 
> > Would you accept a patch that would make it possible to use the
> > distribution's initrd creation tools (initramfs-tools, dracut,
> > mkinitcpio) with febootstrap?
> Yes, with a few privisos.  I hope you don't think these are too
> onerous, but from a libguestfs point of view they are vital:
> - It would have to work with Fedora (dracut) and Debian
> - It would need to not slow down boot at all.  ie.
>   'time guestfish -a /dev/null run' should not be affected
> - It shouldn't make the boot any more risky/buggy than it is
>   currently.  A low bar because our boot is already quite buggy,
>   but let's not make things worse ...

I forgot an important one:

- Mustn't require root.

dracut basically requires root for everything.  We used to use
fakeroot/fakechroot in febootstrap 2.x, and it was a world of pain.


Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming blog: http://rwmj.wordpress.com
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