From owner-freebsd-hackers Mon Mar 26 9:40:24 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from fw.wintelcom.net (ns1.wintelcom.net [209.1.153.20]) by hub.freebsd.org (Postfix) with ESMTP id 6DF7237B71B for ; Mon, 26 Mar 2001 09:40:21 -0800 (PST) (envelope-from bright@fw.wintelcom.net) Received: (from bright@localhost) by fw.wintelcom.net (8.10.0/8.10.0) id f2QHeHk25849; Mon, 26 Mar 2001 09:40:17 -0800 (PST) Date: Mon, 26 Mar 2001 09:40:16 -0800 From: Alfred Perlstein To: Roger Hardiman Cc: hackers@FreeBSD.ORG Subject: Re: Porting a Linux driver to FreeBSD with ioctl return values Message-ID: <20010326094016.C9431@fw.wintelcom.net> References: <3ABF45B6.DF5A0B7F@cs.strath.ac.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <3ABF45B6.DF5A0B7F@cs.strath.ac.uk>; from roger@cs.strath.ac.uk on Mon, Mar 26, 2001 at 02:35:50PM +0100 X-all-your-base: are belong to us. Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG * Roger Hardiman [010326 05:37] wrote: > 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. I just woke up.... er, try this: p->p_retval[0] = your_return_value; in your ioctl code... or are you saying that the ioctl code spams over it? -- -Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org] Represent yourself, show up at BABUG http://www.babug.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message