From owner-cvs-all@FreeBSD.ORG  Sun Dec 16 14:14:31 2007
Return-Path: <owner-cvs-all@FreeBSD.ORG>
Delivered-To: cvs-all@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id A9A0D16A46C;
	Sun, 16 Dec 2007 14:14:31 +0000 (UTC) (envelope-from dds@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org
	[IPv6:2001:4f8:fff6::29])
	by mx1.freebsd.org (Postfix) with ESMTP id 7478D13C458;
	Sun, 16 Dec 2007 14:14:31 +0000 (UTC) (envelope-from dds@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.14.1/8.14.1) with ESMTP id lBGEEV9M050573;
	Sun, 16 Dec 2007 14:14:31 GMT (envelope-from dds@repoman.freebsd.org)
Received: (from dds@localhost)
	by repoman.freebsd.org (8.14.1/8.14.1/Submit) id lBGEEV3O050572;
	Sun, 16 Dec 2007 14:14:31 GMT (envelope-from dds)
Message-Id: <200712161414.lBGEEV3O050572@repoman.freebsd.org>
From: Diomidis Spinellis <dds@FreeBSD.org>
Date: Sun, 16 Dec 2007 14:14:31 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Cc: 
Subject: cvs commit: src/bin/mv mv.c
X-BeenThere: cvs-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: CVS commit messages for the entire tree <cvs-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-all>
List-Post: <mailto:cvs-all@freebsd.org>
List-Help: <mailto:cvs-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 16 Dec 2007 14:14:31 -0000

dds         2007-12-16 14:14:31 UTC

  FreeBSD src repository

  Modified files:
    bin/mv               mv.c 
  Log:
  When moving a directory across devices to a place where a directory
  with the same name exists, delete that directory first, before performing
  the copy.  This ensures that mv(1) across devices follows the semantics
  of rename(2), as required by POSIX.
  
  This change could introduce the potential of data loss, even if the
  copy fails, violating the atomicity properties of rename(2).  This is
  (mostly) mitigated by first renaming the destination and obliterating
  it only after a succesfull copy.
  
  The above logic also led to the introduction of code that will cleanup
  the results of a partial copy, if a cross-device copy fails.
  
  PR:             bin/118367
  MFC after:      1 month
  
  Revision  Changes    Path
  1.47      +83 -23    src/bin/mv/mv.c