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Date:      Fri, 14 Jul 2000 12:48:05 +0200
From:      Adrian Chadd <adrian@FreeBSD.ORG>
To:        Chris Costello <chris@calldei.com>
Cc:        Dag-Erling Smorgrav <des@flood.ping.uio.no>, Adrian Chadd <adrian@FreeBSD.ORG>, Matthew Dillon <dillon@apollo.backplane.com>, Andrzej Bialecki <abial@webgiro.com>, freebsd-arch@FreeBSD.ORG
Subject:   Re: SysctlFS
Message-ID:  <20000714124805.F17372@ywing.creative.net.au>
In-Reply-To: <20000714053540.A30847@holly.calldei.com>; from chris@calldei.com on Fri, Jul 14, 2000 at 05:35:41AM -0500
References:  <Pine.BSF.4.20.0007121328020.49102-100000@mx.webgiro.com> <20000712144510.A11316@ywing.creative.net.au> <200007130537.WAA29614@apollo.backplane.com> <20000714112117.D17372@ywing.creative.net.au> <xzppuohggib.fsf@flood.ping.uio.no> <20000714053540.A30847@holly.calldei.com>

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On Fri, Jul 14, 2000, Chris Costello wrote:
> On Friday, July 14, 2000, Dag-Erling Smorgrav wrote:
> > I'm only half joking. Everyone seems to agree that we want (and need)
> > devfs, but nobody seems to want to actually write it (yes, I know
> > about the ownership / permissions problem, but don't you think someone
> > would have solved it by now if they really wanted to?)
> 
>    I can think of two implementations.
> 
>    1. A devfsd, which uses some sort of routing socket/syscall/whatever
>       and writes out permission changes to some file in /var/db.
>       I heard this one from someone else but I can't think of who.
>    2. A mount argument specifying a file to store the permission
>       info in.  Same idea as #1, different approach.
> 
>       mount -t devfs /var/db/devfs.db /dev

As I said in my previous email, persistence isn't the primary problem
in my eyes. There are many ways people can handle it. What I see as being
an interesting problem is handling devfs across multiple process/group
namespaces (jail/chroot) without cluttering up your mount table.



Adrian

-- 
Adrian Chadd			Build a man a fire, and he's warm for the
<adrian@FreeBSD.org>		rest of the evening. Set a man on fire and
				he's warm for the rest of his life.



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