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Date:      Sat, 15 Jul 2000 17:43:13 -0600
From:      Warner Losh <imp@village.org>
To:        Brian Fundakowski Feldman <green@FreeBSD.org>
Cc:        freebsd-arch@FreeBSD.org
Subject:   Re: SysctlFS 
Message-ID:  <200007152343.RAA49544@harmony.village.org>
In-Reply-To: Your message of "Sat, 15 Jul 2000 19:10:55 EDT." <Pine.BSF.4.21.0007151907310.877-100000@green.dyndns.org> 
References:  <Pine.BSF.4.21.0007151907310.877-100000@green.dyndns.org>  

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In message <Pine.BSF.4.21.0007151907310.877-100000@green.dyndns.org> Brian Fundakowski Feldman writes:
: On Sat, 15 Jul 2000, Robert Watson wrote:
: 
: > On Sat, 15 Jul 2000, Brian Fundakowski Feldman wrote:
: > 
: > > We could create a way for jailed processes to "break out" into the
: > > canonical name space. This is a description of possible semantics for
: > 
: > What canonical namespace would that be?
: 
: Unless you can think of anything else that could possibly be the
: canonical namespace, struct vnode *rootvnode.

Put another way...

If we have a jail that lives in /foo/bar, and we have ways to
symboliclly link outside /foo/bar, that's a big problem.

Also, you really don't want too many devices in a jail's /dev tree.
You really wouldn't want devfs for jail unless you could limit it
severely.  And that's going to be hard to write, I think.

Warner


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