Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261461AbUK1NDt (ORCPT ); Sun, 28 Nov 2004 08:03:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261462AbUK1NDt (ORCPT ); Sun, 28 Nov 2004 08:03:49 -0500 Received: from neopsis.com ([213.239.204.14]:37031 "EHLO matterhorn.neopsis.com") by vger.kernel.org with ESMTP id S261461AbUK1NDo (ORCPT ); Sun, 28 Nov 2004 08:03:44 -0500 Message-ID: <41A9CD78.1050002@dbservice.com> Date: Sun, 28 Nov 2004 14:07:04 +0100 From: Tomas Carnecky User-Agent: Mozilla Thunderbird 0.8 (Windows/20040913) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Al Viro Cc: Miklos Szeredi , ecki-news2004-05@lina.inka.de, linux-kernel@vger.kernel.org Subject: Re: Problem with ioctl command TCGETS References: <20041128121800.GZ26051@parcelfarce.linux.theplanet.co.uk> In-Reply-To: <20041128121800.GZ26051@parcelfarce.linux.theplanet.co.uk> X-Enigmail-Version: 0.86.1.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Neopsis-MailScanner-Information: Please contact the ISP for more information X-Neopsis-MailScanner: Found to be clean X-MailScanner-From: tom@dbservice.com Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1066 Lines: 26 Al Viro wrote: > On Sun, Nov 28, 2004 at 12:22:03PM +0100, Miklos Szeredi wrote: > >>>The set-get is supposed to be used for queries, too? The size of value is >>>only used for the get case to describe the buffer length in that case? >>>because otherwise the set-get case may require a short value in and a large >>>answer structure out. >> >>You misunderstand the motivation. This is to get/set small compact >>parameters, not huge structures or big data. Think get/setsockopt(). > > > Think read(2)/write(2). We already have several barfbags too many, > and that includes both ioctl() and setsockopt(). We are stuck with > them for compatibility reasons, but why the hell would we need yet > another one? And what's the option? So without ioctl, how would you reaplace this: ioctl(cdrom_fd, CDROMEJECT, 0)? tom - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/