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Date: Wed, 2 Jul 2003 18:01:05 -0400 (EDT)
From: Zhihui Zhang <bf20761@binghamton.edu>
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To: Sam Leffler <sam@errno.com>
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cc: Eivind Hestnes <eivind.hestnes@stabbursmoen.no>
Subject: Re: Support for XFS in FreeBSD?
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On Wed, 2 Jul 2003, Sam Leffler wrote:

> [cross-posting removed]
>
> >> Note: SCO is suing people who have touched Linux code with code
> >> from commercial OS's derived from System V.  SGI's IRIX, from
> >> which XFS comes, is derived from System V, so there is some legal
> >> risk involved to anyone doing a port: SCO may sue you, too.  I
> >> don't know if this effects the projects previous statements.
> >>
> >
> > True, this is a danger. There was a certain amount of similarity in
> > XFS sources between FreeBSD kernel internals and Irix interfaces which
> > arguably can be traced to common Unix roots of both systems. SCO might
> > consider XFS theirs some day :)
>
> Ignore this FUD. SGI's XFS implementation is all new work.

Suppose someone ported XFS to FreeBSD, then what liscence can you use
without causing any legal trouble? You must use GNU, but the interface
code (VFS/vnode, bio, vnode, etc.) are already under BSD liscence.  Can
one KLD program contain code using different liscences?

-Zhihui