From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17399 invoked by alias); 23 May 2016 17:19:23 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 17390 invoked by uid 89); 23 May 2016 17:19:22 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.0 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 spammy=Erik, erik, office, Office X-HELO: mail-lf0-f44.google.com Received: from mail-lf0-f44.google.com (HELO mail-lf0-f44.google.com) (209.85.215.44) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-GCM-SHA256 encrypted) ESMTPS; Mon, 23 May 2016 17:19:21 +0000 Received: by mail-lf0-f44.google.com with SMTP id k98so17160448lfi.1 for ; Mon, 23 May 2016 10:19:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:in-reply-to:references:date :message-id:subject:from:to; bh=iwgmFNijFQj9i/Lz72J6qgqq0nICP4CfEXjpFepyas4=; b=ftKDvcedXbfRgByfrlHffscrCt9iyBetP6B9PlopqtgYUPd1vGgQeRer2hIZlk2XEL owtI9JDn7JgVz1fIMS/oY1CJYkb5Wj9E8Q9MrzSgjb23E6/qoWsvHEcv9KmWmlSl2gIv jEZX78sASMIn6VJ2rym2BizUcWOwW1Hl2yM0+m1D/Wgq++rouaaDWOCM8asitOUQIAcG 5/QMKaYeIHEYv1wJN+l6ZjmrkAtJNkqYuqoZiHxOpKTlnqFvHni8NxwirBcVEynz+8Wm oOmhIlfGrDN24m05CtTvgWqFtJZnjF3y1C/xgqxoqjrJtt8BUwvrmJ0hFFbYKFk09brB 9nIQ== X-Gm-Message-State: AOPr4FXmagUUcs4T7K5fIo7X6lsjKfU0tQ8Jtbm1exC93VBs/Qf1LVO+VfDZ8wKb81Y5KdSMcIX8Q9t39rmQcA== MIME-Version: 1.0 X-Received: by 10.25.201.88 with SMTP id z85mr5528767lff.140.1464023957791; Mon, 23 May 2016 10:19:17 -0700 (PDT) Received: by 10.114.199.169 with HTTP; Mon, 23 May 2016 10:19:17 -0700 (PDT) In-Reply-To: References: Date: Mon, 23 May 2016 17:19:00 -0000 Message-ID: Subject: =?UTF-8?Q?Re=3A_tar_incremental_backups_and_ctime=E2=80=8F_problem?= From: Erik Soderquist To: cygwin@cygwin.com Content-Type: text/plain; charset=UTF-8 X-IsSubscribed: yes X-SW-Source: 2016-05/txt/msg00271.txt.bz2 On Mon, May 23, 2016 at 4:40 AM, x y wrote: > Hello, > > The MS Office applications are changing the ctime value of .doc and > .xls files even if they are not modified. Opening and closing an > office file without modifying the content is changing ctime and the > unmodified document is included in the incremental tar archive. I would say this is an MS Office flaw. If _nothing_ is, neither ctime nor mtime should be updated. > Could it be possible to use the mtime value instead of ctime to avoid > the the reappearance of the unchanged files in the incremental archive? Use a find command to build a file list of all files changed since last backup. Personally I highly recommend differential against last full rather than incremental, but that is a different discussion. Also, you might reach out to Microsoft for why they are modifying any timestamp if nothing was changed. -- Erik -- 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