X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-1.8 required=5.0 tests=AWL,BAYES_00 X-Spam-Check-By: sourceware.org Message-ID: <4B255D7D.2030805@t-online.de> Date: Sun, 13 Dec 2009 22:32:45 +0100 From: Christian Franke User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.4) Gecko/20091017 SeaMonkey/2.0 MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: overwriting an in-use executable References: <416096c60912130019s5188fdd9w2f561005ba2c8c69@mail.gmail.com> <4B24DB01.2040201@t-online.de> <4B24FF57.9050309@byu.net> <416096c60912131301j1d35faf4x2e0dd64b1fa2849@mail.gmail.com> In-Reply-To: <416096c60912131301j1d35faf4x2e0dd64b1fa2849@mail.gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: 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 Andy Koppe wrote: > 2009/12/13 Eric Blake: > >>> Same when trying to 'rm' an in-use executable: Works on 1.7, fails with >>> 'Permission denied' on 1.5. Cygwin 1.7 works like Linux here. I don't >>> know whether POSIX requires this behavior. >>> >> POSIX allows both behaviors, but the cygwin 1.7 behavior is more like >> Linux and traditional unix semantics >> > And very useful it is, but I was wondering why it works with 'mv' but not 'cp'? > > 'cp' does not unlink() before overwriting an existing file, it tries to overwrite the data in place. This also fails on *nix, typically with "Text file busy". 'mv' only modifies the link between file name in directory and file data. The OS can keep the old data (inode) until the exe terminates. Christian -- 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