[BusyBox] How to unmount filesytem that init was run from?

[Goetz Bock]

On Wed, Mar 03 '04 at 15:05, Mago Barca wrote:
> I am using busybox and would to know how unmount the filesystem that init
> was run from?
You can't.

Init is still running, so it's opened on the filesystem and you can't
unmount open filesystems. (some BSD apparently can, but that's realy
unwise).

If you want to do the unmount before you run init, you can do that with
an initrd

<setup/copy system to new location>
cd $newlocation
mkdir initrd
pivotroot ./ initrd
chroot /
cd /
exec sbin/init < dev/console > dev/console

(types from memmory)
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