> the only "problem" is that files aren't currently mount points.  i
> guess one could union mount a compat portal daemon over (under?)
> /var/log and /var/run...

Files can be mount points.  Or at least, mounted things can be files.
I discovered this the hard way while playing with filesystems once.
(That is, while I think maybe the underlying-filesystem node must be a
directory, the thing mounted does not have to be, once mounted.)

Indeed, it was just such things that made me submit PR 441.  I notice
fair added -R to umount some years later; cvs diff makes it look as
though the change came from an addendum I sent in to the PR some time
later, but who knows (or cares)....

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