Another idea.

[Bruce Cran]

On Wed, 12 Nov 2008 10:34:35 -0600
Nathan Whitehorn <nwhitehorn at freebsd.org> wrote:

> Horst G__nther Burkhardt III wrote:
> > Ok, it's possible on x86 (iirc) to make FreeBSD boot directly into
> > single-user mode, and not bother with /etc/rc.d and the like.
> > 
> > Is it possible to feed a flag to the ofw bootloader to do something
> > similar? It would help greatly.
> > 
> > Thanks,
> > -- Horst.
> 
> boot -s at the loader prompt, just like on x86.

The boot process on powerpc is slightly different than on x86, because
you don't get the nice boot screen where you press 6 to get to the
prompt. Instead you get a message saying something like
"Booting /boot/kernel/kernel in 10 seconds...". Press a key at that
point and you get a prompt where you can enter "boot -s" to go to
single-user mode.

-- 
Bruce Cran