From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: loop in backup-copy-buffer Date: Thu, 23 Aug 2007 17:18:32 -0400 Message-ID: References: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: sea.gmane.org 1187903926 8748 80.91.229.12 (23 Aug 2007 21:18:46 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Thu, 23 Aug 2007 21:18:46 +0000 (UTC) Cc: Glenn Morris , emacs-devel@gnu.org, rudalics@gmx.at To: rms@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Aug 23 23:18:42 2007 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1IOK4e-0003Cq-Dy for ged-emacs-devel@m.gmane.org; Thu, 23 Aug 2007 23:18:40 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1IOK4d-0005mz-N6 for ged-emacs-devel@m.gmane.org; Thu, 23 Aug 2007 17:18:39 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1IOK4b-0005mc-9H for emacs-devel@gnu.org; Thu, 23 Aug 2007 17:18:37 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1IOK4Z-0005lP-Rm for emacs-devel@gnu.org; Thu, 23 Aug 2007 17:18:36 -0400 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1IOK4Z-0005lM-L8 for emacs-devel@gnu.org; Thu, 23 Aug 2007 17:18:35 -0400 Original-Received: from tomts5.bellnexxia.net ([209.226.175.25] helo=tomts5-srv.bellnexxia.net) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1IOK4X-0002QY-S2; Thu, 23 Aug 2007 17:18:34 -0400 Original-Received: from pastel.home ([70.55.80.33]) by tomts5-srv.bellnexxia.net (InterMail vM.5.01.06.13 201-253-122-130-113-20050324) with ESMTP id <20070823211832.ZYMH1592.tomts5-srv.bellnexxia.net@pastel.home>; Thu, 23 Aug 2007 17:18:32 -0400 Original-Received: by pastel.home (Postfix, from userid 20848) id 26A53821A; Thu, 23 Aug 2007 17:18:31 -0400 (EDT) In-Reply-To: (Richard Stallman's message of "Tue\, 21 Aug 2007 23\:15\:46 -0400") User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1.50 (gnu/linux) X-Detected-Kernel: Solaris 8 (1) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:77059 Archived-At: > You added the (potentially infinite) loop in backup-buffer-copy a few > years ago. Looks like it was adapted from make-temp-name. I can see it > might make sense to loop while trying to make a tempfile name, but was > there ever a case where this was found to be necessary when backing > up? > In make-temp-name, this is needed because of possible race conditions. > I think there is also a possible race condition for making backup files, > and that's why I put something similar here. The problem with make-temp-name is not just a race-condition but that the race-condition introduces a security hole. I don't think the same holds for backup files since they must have predicate names. Stefan