Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm 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 Message-ID: <4035BEBA.BA2A9CC4@dessent.net> Date: Fri, 20 Feb 2004 00:00:58 -0800 From: Brian Dessent Organization: My own little world... MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: search and replace tool References: <291592011.20040218205953@thequod.de> <6.0.1.1.0.20040218151724.0398d488@127.0.0.1> <40354B21.6040802@x-ray.at> <40355763.E01A2710@dessent.net> <4035B0EB.50003@corpit.ru> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Reply-To: cygwin@cygwin.com Egor Duda wrote: > huh? what do you mean "in-place"? linux writes new file to new place, it > just deletes .bak file afterwards, unlike cygwin. Okay, it's not technically in-place. But perl expects to be able to do the following if you specify "-i": x = open("file"); unlink("file"); y = open("file"); read(x, ...); write(y, ...); When the program ends or the filehandles are closed, there's no further action required, such as removing the backup copy, because it's already been unlinked. Unlinking an open file is not supported by the windows filesystem (?) so this sequence is impossible. To emulate this with Cygwin, new code would have to be added that gets called after fh 'x' is closed to remove the backup copy. I'm no expert on perl internals but it sounds like this has never been done because it's nontrivial. That's all I know. I think Gerrit would be able to comment further on this. Brian -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/