Julian Elischer scribbled this message on Sep 20:
> On Mon, 20 Sep 1999, Brian Beattie wrote:
> > On Mon, 20 Sep 1999, Julian Elischer wrote:
> > > While I sharply disagree, with your assertion, I also point out that if
> > > you make such a all-singing-all-dancing devfsd, then you might as well get
> > > rid of devfs entirely, and just have devfsd make the devices using normal
> > > mknod commands.
>
> > Since I did not follow the original discussion, maybe this idea has been
> > discussed and discarded, but what about a "translucent" like deal.
> > Basically yu would mount the devfs on top of an existing directrory or
> > filesystem. The underlying contents would "show through" by some set of
> > rules. One rule would be that if a device node existed in the devfs and
> > the real fs, and the device node in the real fs was for the "fake/null
> > whatever you want to call it device", the resulting device node would have
> > the major/minor fron the devfs and the owner/group/permissions from the
> > real fs underneath. Any change to the node would affect the real fs
> > underneath. I could probably expand on this futher if anybody is
> > interested.
>
> Basically this is my scheme. Using something like a 'union mount'.
> I expounded tis as a possibility a few years ago. It is about as close as
> I can get using a filesystem to do the work. A daemon can do these things
> easily but has other drawbacks.
what happens in this case:
mount /devfs
cd /devfs
mv ttyd1 da0c # sure you don't normally do this but you CAN!
cd /
umount /devfs
mount /devfs
sorry, that doesn't cut it as you loose your "dynamic" links from the
umount to mount, and we are back to the major/minor number to keep
track of which device node belongs to which device...
--
John-Mark Gurney Voice: +1 408 975 9651
Cu Networking
"The soul contains in itself the event that shall presently befall it.
The event is only the actualizing of its thought." -- Ralph Waldo Emerson
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