Date: Mon, 26 Mar 2001 09:40:16 -0800 From: Alfred Perlstein <bright@wintelcom.net> To: Roger Hardiman <roger@cs.strath.ac.uk> Cc: hackers@FreeBSD.ORG Subject: Re: Porting a Linux driver to FreeBSD with ioctl return values Message-ID: <20010326094016.C9431@fw.wintelcom.net> In-Reply-To: <3ABF45B6.DF5A0B7F@cs.strath.ac.uk>; from roger@cs.strath.ac.uk on Mon, Mar 26, 2001 at 02:35:50PM %2B0100 References: <3ABF45B6.DF5A0B7F@cs.strath.ac.uk>
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* Roger Hardiman <roger@cs.strath.ac.uk> [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
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