Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Date: Thu, 19 Feb 2004 23:51:10 -0800
From: Yitzchak Scott-Thoennes <sthoenna AT efn DOT org>
To: cygwin AT cygwin DOT com
Subject: Re: search and replace tool
Message-ID: <20040220075109.GA132@efn.org>
References: <291592011 DOT 20040218205953 AT thequod DOT de> <6 DOT 0 DOT 1 DOT 1 DOT 0 DOT 20040218151724 DOT 0398d488 AT 127 DOT 0 DOT 0 DOT 1> <40354B21 DOT 6040802 AT x-ray DOT at> <Pine DOT GSO DOT 4 DOT 56 DOT 0402191929000 DOT 22216 AT slinky DOT cs DOT nyu DOT edu> <40355763 DOT E01A2710 AT dessent DOT net> <Pine DOT GSO DOT 4 DOT 56 DOT 0402191952150 DOT 22216 AT slinky DOT cs DOT nyu DOT edu> <4035B0EB DOT 50003 AT corpit DOT ru>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <4035B0EB.50003@corpit.ru>
User-Agent: Mutt/1.4i
Organization: bs"d
X-IsSubscribed: yes
Note-from-DJ: This may be spam

On Fri, Feb 20, 2004 at 10:02:03AM +0300, 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.
> 
> deo AT paltus:~$ echo aaa >xxx
> deo AT paltus:~$ ls -i xxx
>  408096 xxx
> deo AT paltus:~$ perl -i -pe 's/aaa/bbbb/' xxx
> deo AT paltus:~$ ls -i xxx
>  408074 xxx
> deo AT paltus:~$ cat xxx
> bbbb

That doesn't ever create a backup file or a temporary file.  It opens
xxx for read, unlinks it, opens xxx for writing, then reads from the
original handle and writes to the second handle.  This is AFAIUI
impossible on windows, but possible on things like unix and VMS (where
the unlink is skipped because of the automatic versioning).

--
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/