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Date:      Sun, 31 Dec 1995 14:11:20 +1100 (EST)
From:      David Dawes <dawes@rf900.physics.usyd.edu.au>
To:        jkh@time.cdrom.com (Jordan K. Hubbard)
Cc:        hackers@freebsd.org
Subject:   Re: /dev/io
Message-ID:  <199512310311.OAA16531@rf900.physics.usyd.edu.au>
In-Reply-To: <8724.820374911@time.cdrom.com> from "Jordan K. Hubbard" at Dec 30, 95 05:55:11 pm

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>> To me it seems like it would be more "standard" if FreeBSD supported an
>> implementation like NetBSD's.  It would also pave the way for the
>> implementation of IO permission bitmaps (if they are ever needed).  Changing
>> it would probably be a little more secure, and I can't even think of any 
>> programs that would break if /dev/io was removed?
>
>I think a few X servers would definitely break of /dev/io went away
>suddently, but I also see no reason why the other interface couldn't
>be implemented in parallel with a change-over at some point in the
>future.

For what it's worth, the XFree86 servers get I/O permission by using
the KDENABIO ioctl in the console driver rather than by opening /dev/io.

David



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