Date: Tue, 19 Nov 2002 17:47:19 -0800 From: Kris Kennaway <kris@obsecurity.org> To: Nate Lawson <nate@root.org> Cc: ports@freebsd.org, stable@freebsd.org Subject: Re: HEADSUP - change in CDRIOC.*SPEED ioctl units Message-ID: <20021120014718.GA7632@rot13.obsecurity.org> In-Reply-To: <Pine.BSF.4.21.0211191633340.61877-100000@root.org> References: <Pine.BSF.4.21.0211191633340.61877-100000@root.org>
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On Tue, Nov 19, 2002 at 04:39:29PM -0800, Nate Lawson wrote:
> I just MFCd code that was committed to current a month ago that changes
> the semantics of CDRIOC{READ,WRITE}SPEED ioctls to take the raw value (in
> KB/sec). Before, the units were multiples of CDROM 1X speed (i.e. 1x =3D
> 177 K/s, 2x =3D 354 K/s, ...) Also, it is now possible to tell the drive=
to
> select its maximum possible speed by sending 0xffff as the ioctl argument.
>=20
> Maintainers of CD player, ripper, and burner packages should make sure
> they've tracked the change correctly. If you don't use the CDRIOC
> interface, you don't need to change anything. If you do, multiply all
> values by 177 before passing them to ioctl(). For examples on how to do
> this, see usr.sbin/cdcontrol or usr.sbin/burncd.
This is not acceptable, IMO. We don't break ABI or API compatibility
in the -STABLE branch without very good reason.
Kris
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