From owner-freebsd-hackers  Mon Mar 26  5:37:22 2001
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Message-ID: <3ABF45B6.DF5A0B7F@cs.strath.ac.uk>
Date: Mon, 26 Mar 2001 14:35:50 +0100
From: Roger Hardiman <roger@cs.strath.ac.uk>
Organization: University of Strathclyde
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To: hackers@freebsd.org
Subject: Porting a Linux driver to FreeBSD with ioctl return values
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Hi,
I'm porting the some linux telephony API drivers over
to FreeBSD.

But the author of the linux driver used the 'hack' of
returning values from the ioctls as the error result.

eg    volume = ioctl (fd, IXJ_GET_VOLUME)

instead of using
      error = ioctl (fd, IXJ_GET_VOLUME, &volume);


Naturally I want to keep the API the same on FreeBSD
so existing apps will compile without change.
But right now it looks like I cannot do this.

Is there anything I can do in the FreeBSD driver
or in existing source to help, without imposing
a new 'BSD' API.


Cheers
Roger Hardiman

roger@freebsd.org

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