From owner-freebsd-hackers@FreeBSD.ORG  Fri Dec 24 16:01:49 2010
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id D818A1065744
	for <freebsd-hackers@freebsd.org>; Fri, 24 Dec 2010 16:01:49 +0000 (UTC)
	(envelope-from gljennjohn@googlemail.com)
Received: from mail-bw0-f54.google.com (mail-bw0-f54.google.com
	[209.85.214.54])
	by mx1.freebsd.org (Postfix) with ESMTP id 5E95C8FC0A
	for <freebsd-hackers@freebsd.org>; Fri, 24 Dec 2010 16:01:49 +0000 (UTC)
Received: by bwz12 with SMTP id 12so1187017bwz.13
	for <freebsd-hackers@freebsd.org>; Fri, 24 Dec 2010 08:01:48 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=googlemail.com; s=gamma;
	h=domainkey-signature:received:received:date:from:to:cc:subject
	:message-id:in-reply-to:references:reply-to:x-mailer:mime-version
	:content-type:content-transfer-encoding;
	bh=Ua3aeTnIZn6REExsjCxI5h1at13ksWvzuievOzh2bh8=;
	b=VZW2O+OP35XFe460MZCrQEXzVxSZbjh0VUhii8h3rBV//h3vwUD1cffR8YiBi38F6y
	vueN8H8ennH/GgjogVQSjvKU/8QEmt5tm15z71vwep3bOk9DWvC3zN2x5bRrqM0gNHUQ
	1AiVr/iW592oFfyQ6hLQztosVGEj0rhV/bgoo=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma;
	h=date:from:to:cc:subject:message-id:in-reply-to:references:reply-to
	:x-mailer:mime-version:content-type:content-transfer-encoding;
	b=SMnw0rmgdLhY0rOOnoRC5fdtZTh9M9mMTnRp0JfrcgKbjwErCzhvL6Riv6ovEGPhEu
	Y1ZwtiIBRhzLjcM9OM7OWG9CSYu4MX41J0WXGXv9t0vQ57gG6U/nf0LM55NDoLnIyRbe
	0H6IYjff3edEQvscsNsZrK0NB9GeBaFsH7FRA=
Received: by 10.204.80.70 with SMTP id s6mr3434802bkk.142.1293206508193;
	Fri, 24 Dec 2010 08:01:48 -0800 (PST)
Received: from ernst.jennejohn.org (p578E395D.dip.t-dialin.net [87.142.57.93])
	by mx.google.com with ESMTPS id f20sm3749114bkf.4.2010.12.24.08.01.46
	(version=TLSv1/SSLv3 cipher=RC4-MD5);
	Fri, 24 Dec 2010 08:01:47 -0800 (PST)
Date: Fri, 24 Dec 2010 17:01:44 +0100
From: Gary Jennejohn <gljennjohn@googlemail.com>
To: Mohammad Hedayati <hedayati.mo@gmail.com>
Message-ID: <20101224170144.1d734e3c@ernst.jennejohn.org>
In-Reply-To: <AANLkTimuz3KWG80yXR8gmg+YxVKW0pQyF2wtfwXqKU3K@mail.gmail.com>
References: <AANLkTimuz3KWG80yXR8gmg+YxVKW0pQyF2wtfwXqKU3K@mail.gmail.com>
X-Mailer: Claws Mail 3.7.8 (GTK+ 2.18.7; amd64-portbld-freebsd9.0)
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Cc: freebsd-hackers@freebsd.org
Subject: Re: Inappropriate ioctl for device
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: gljennjohn@googlemail.com
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 24 Dec 2010 16:01:49 -0000

On Fri, 24 Dec 2010 18:17:18 +0330
Mohammad Hedayati <hedayati.mo@gmail.com> wrote:

> I'm writing a simple char device. So far everything went so good
> (read/write), but here I'm going to add support for ioctl.
> 
> int
> ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, struct thread *td)
> {
>      int error = 0;
>      uprintf("Here...\n");
>      return(error);
> }
> and I'm calling it here:
> 
> len = ioctl(cd, 0);
> perror("ioctl");
> 
> but when runnig it says:
> 
> ioctl: Inappropriate ioctl for device

Carefully read ioctl(2) and consider that you're passing in 0 as the cmd.
If you still don't understand your error, post again.

Hint: look at /sys/kern/sys_generic.c:^ioctl

-- 
Gary Jennejohn