pivot_root: where?

[Sebastiaan <sebas@sacred-key.org>]

Hi,

I am trying to make an initrd (without much succes yet). It is supposed to
do the following:

- mount an hfs filesystem on /mnt
- mount a loopback ext2 filesystem from /mnt/linux.img on /new-root
- set /new-root as the new root device
- boot from it

The doc about initrd in /usr/src/Docs tells me that I have to run
pivot_root for the third step and that this command should be in
util-linux. I have downloaded it from woody, but the command was not
there. Tried several things, but without succes.

I think I have to do something with rdev, but the docs are very limited.

Can anybody help?

Thanks in advance,
Sebastiaan