[Ubifs] Reboot -> "recovery needed"?

[Gilles]

On Tue, 28 Jun 2011 14:22:38 +0300, Artem Bityutskiy
<dedekind1 at gmail.com> wrote:
>> Thanks for the info. I'll see if I can edit the source code to
>> "reboot" to unmount the root filesystem, or replace "reboot" with
>> another application or script.
>
>I think it may be enough to re-mount read-only, and probably it is
>impossible to unmount in many cases. But I am not 100% sure.

So I could rename "reboot" something else, then write a shell script
named "reboot" that will first remount the Ubifs partition ro, and
then call the real "reboot"?