X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Date: Mon, 7 Mar 2011 16:43:30 +0100 From: Corinna Vinschen To: cygwin@cygwin.com Cc: tar-list Subject: Re: tar --atime-preserve with an empty file triggers a warning Message-ID: <20110307154330.GA12899@calimero.vinschen.de> Reply-To: cygwin@cygwin.com, tar-list Mail-Followup-To: cygwin@cygwin.com, tar-list References: <20110307152005.17292u50da242vth@messagerie.si.c-s.fr> <4D74EC98.7090803@redhat.com> <20110307144349.GE18640@calimero.vinschen.de> <4D74F4A8.2080505@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <4D74F4A8.2080505@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com On Mar 7 08:07, Eric Blake wrote: > [adding bug-tar] > > On 03/07/2011 07:43 AM, Corinna Vinschen wrote: > > THis looks like a tar bug, per the strace. For some reason, if the > > file is empty, tar calls futimens on file descriptor 0 (which is > > connected to /dev/tty1 in my case), while it call futimens on > > file descriptor 4 (connected to the file empty) if the file empty > > is... well, not empty. > > This is indeed multiple bug reports for the price of 1 :) > [...] > Finally, cygwin is failing with EINVAL for futimens on a pty fd. > However, I don't know if that's something that we can change, since > cygwin doesn't really maintain a notion of changeable times on ptys at > the moment. Please take this as granted for now. Ptys/ttys are implemented using other Windows objects (events, pipes, etc) and none of them supports setting a file time. I don't know if faking the ability to set the filetime is really feasible. Maybe we should just return EPERM? Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple