>>> This pretty much requires that the union filesystem be in the
>>> kernel and that fdesc be mounted over /dev.
>> Um, not in my experience.  "-t fdesc -o union" works just fine for
>> me.  No need for -t union.
> Oh, I was under the impression that "options UNION" was required for
> any filesystem stacking operation.

As far as I can see, it's not.  The MNT_UNION code - at least that part
of it that's in /sys/kern - does not appear to be conditional on
anything.

> Even if that is not true, the point of my argument is that things
> break when fdesc overlays the existing
> /dev/{stdin,stdout,stderr,tty}.

And I entirely agree with you on that.

					der Mouse

			    mouse@collatz.mcrcim.mcgill.edu