Date: Wed, 4 Aug 1999 13:01:55 -0400 (EDT) From: "Brian F. Feldman" <green@FreeBSD.org> To: Doug Rabson <dfr@nlsystems.com> Cc: Mike Smith <mike@smith.net.au>, Matthew Dillon <dillon@apollo.backplane.com>, Ollivier Robert <roberto@keltia.freenix.fr>, hackers@FreeBSD.org Subject: Re: Jail syscalls Message-ID: <Pine.BSF.4.10.9908041300360.55682-100000@janus.syracuse.net> In-Reply-To: <Pine.BSF.4.10.9908040949300.385-100000@salmon.nlsystems.com>
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On Wed, 4 Aug 1999, Doug Rabson wrote:
> The argument for versioning is not simply because the size of ip_number
> might change (it should be a sockaddr) but because other fields might be
> added or removed. To avoid allocating a new syscall whenever this happens,
> the structure should be versioned.
Ahh, okay. If we plan on changing it, I agree.
>
> Putting sizeof(whatever) at the beginning of the structure works
> surprisingly well as a versioning system.
Or a version field at a set offset, like in struct ip :)
>
> --
> Doug Rabson Mail: dfr@nlsystems.com
> Nonlinear Systems Ltd. Phone: +44 181 442 9037
>
>
>
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