Date: Sun, 3 Dec 2000 16:58:25 -0800 (PST) From: Matt Dillon <dillon@earth.backplane.com> To: Cy Schubert - ITSD Open Systems Group <Cy.Schubert@uumail.gov.bc.ca> Cc: Brandon Fosdick <bfoz@glue.umd.edu>, "David O'Brien" <obrien@FreeBSD.ORG>, Gregory Bond <gnb@itga.com.au>, stable@FreeBSD.ORG Subject: Re: device numbers (was Re: Removal of Disklabel) Message-ID: <200012040058.eB40wP569449@earth.backplane.com> References: <200012040042.eB40gEH63427@cwsys.cwsent.com>
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:There was some discussion about this two years aog. IIRC the issue of
:manually defining devices was yet to be resolved. Discussion about an
:interface (API and command line tool?) indicated that this hadn't been
:resolved yet. Are we any further to a solution?
:
:Search the -stable archives for "DEVFS (was Re: More problems with new
:slice code )" for the original thread.
:
:Regards, Phone: (250)387-8437
:Cy Schubert Fax: (250)387-5766
I think the discussion petered off when two groups of people deadlocked
on how to handle chmod/chown permissions changes on /dev. That is, how
to make such changes persistent.
I do not think I weighed in on the issue before. In thinking about it,
I believe the best solution is to overlay devfs on top of a real
filesystem and synthesize a combined result. The underlying filesystem
would hold ownership and modes while devfs would hold dev_t info. When
you chowned or chmod'd it would thus be persistent, yet not interfere
with devfs's operation. If persistence was not necessary you simply
would not bother with the overlay and would instead use devfs without
an overlay.
-Matt
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