From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762832AbXGPUoT (ORCPT ); Mon, 16 Jul 2007 16:44:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753369AbXGPUoI (ORCPT ); Mon, 16 Jul 2007 16:44:08 -0400 Received: from terminus.zytor.com ([198.137.202.10]:36150 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753365AbXGPUoG (ORCPT ); Mon, 16 Jul 2007 16:44:06 -0400 Message-ID: <469BD7B7.30009@zytor.com> Date: Mon, 16 Jul 2007 13:40:23 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.0 (X11/20070419) MIME-Version: 1.0 To: Jeff Garzik CC: Miklos Szeredi , jeremy@goop.org, jengelh@computergmbh.de, viro@ftp.linux.org.uk, nmiell@comcast.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: *at syscalls for xattrs? References: <20070715205313.GE21668@ftp.linux.org.uk> <1184534001.2765.5.camel@entropy> <20070715222323.GG21668@ftp.linux.org.uk> <469B2CAE.9010101@goop.org> <469B3B73.9010400@zytor.com> <469B3EC2.8080702@garzik.org> <469BB190.1080300@zytor.com> <469BCF0C.6070109@garzik.org> In-Reply-To: <469BCF0C.6070109@garzik.org> X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Jeff Garzik wrote: >> >> Well, as Jeremy pointed out, in the absence of threads you can do the >> same thing with fchdir(), however, that's much more of a hack. > > My posixutils project (coreutils replacement) used fchdir(2), but that > still doesn't get you 100% race-free. It gets you close, yes. > I guess you're horked in the case where a single system call (e.g. rename()) needs more than one pathname. Yet another reason why a single cwd isn't enough. -hpa