> > 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.  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}.

	--jtc