initrd in 2.4.19

[David Gibson]

On Thu, May 02, 2002 at 10:13:30AM -0700, Brian Kuschak wrote:
>
> > I want to use pivot_root, so I don't use the special /linuxrc running
> > code.  Instead I use "init=/linuxrc" as part of the command line.  If
> > you do this your first script should work fine (pivot follwed by
> > chroot).  But to be honest, I don't chroot.  I don't think it's
> > necessary.
>
> Using init=/linuxrc allows my first script to work.
>
> However, it's a bit restrictive:  if I want to override the usual boot
> sequence and get the kernel to mount the real root and drop into a shell I
> can't use this method.  With the 'old-style' script, I can set
> "init=/bin/bash".  These get applied AFTER /linuxrc terminates.  If I use
> your method, I can't do that.

Remember that any kernel command line options that the kernel doesn't
recognize get passed to init - as environment variables if they
contain a "=" and as command line arguments otherwise.  So it's fairly
easy to invent a new parameter to control the "real" init and have
your linuxrc interpret it and act accordingly.

--
David Gibson			| For every complex problem there is a
david at gibson.dropbear.id.au	| solution which is simple, neat and
				| wrong.  -- H.L. Mencken
http://www.ozlabs.org/people/dgibson

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