X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:message-id:date:from:mime-version:to:subject
	:references:in-reply-to:content-type:content-transfer-encoding;
	q=dns; s=default; b=pZjb+zJCN8VSBRrMiH17bLJmNdeohWdMMkLp80R5Nh8
	Vp7kVjYuLWGlznMhmhY/N6VWvEsQkK0lvrw9BcRYh0um/aIPrdPVnCY9T+5ddcZz
	PigfMcji6N2q5NMK2Hu7jmX8DxmbSAQOkwr9s0GsVs3WuXu7FjO0t0fWpbv5Pjyo
	=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:message-id:date:from:mime-version:to:subject
	:references:in-reply-to:content-type:content-transfer-encoding;
	s=default; bh=9rBqWik/Sag6m4ZJAAQ2DOLYlcQ=; b=pddyEr/jnEuoZz4mO
	RhGPKIZhj7jvS6EgHf4ANwKIenx5ODmucFq1R4IF7Xm/PuJQ6vijfP+y6nmNCrep
	HNjhLUqBrPFvE5ZrfL/Q0FQGUneq+92al/s5ClV7X9LYzQONW0cyojJnYndHYIbw
	YithXfCdIauXdIN2K3nVBo4qYg=
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/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
Authentication-Results:	sourceware.org; auth=none
X-Virus-Found:	No
X-Spam-SWARE-Status:	No, score=-5.1 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD autolearn=ham version=3.3.2 spammy=
X-HELO:	Ishtar.sc.tlinx.org
Message-ID:	<5877D3CC.4030500@tlinx.org>
Date:	Thu, 12 Jan 2017 11:06:52 -0800
From:	"L. A. Walsh" <cygwin AT tlinx DOT org>
User-Agent:	Thunderbird
MIME-Version:	1.0
To:	cygwin AT cygwin DOT com
Subject:	Re: rename() cannot replace the file which is opened with writable access
References:	<20170112 DOT 090746 DOT 2056666314950620331 DOT trueroad AT trueroad DOT jp>
In-Reply-To:	<20170112.090746.2056666314950620331.trueroad@trueroad.jp>
X-IsSubscribed:	yes

Masamichi Hosoda wrote:
> Hello,
>
> I've found that rename() cannot replace the file
> which is opened with writable access on Cygwin.
> On Linux, it works.
>
> If I understand correctly, it should work under POSIX.
>
> Here's sample code for reproduce.
---
> #define OLDPATH "oldpath"
> #define NEWPATH "newpath"
>
> int main () {
>   int fd;
>   struct flock fl;
>   char buff[] = "test";
>   fd = open (OLDPATH, O_CREAT | O_RDWR | O_TRUNC, 0666);
>   close (fd);
>   fd = open (NEWPATH, O_CREAT | O_RDWR | O_TRUNC, 0666);
>   if (rename (OLDPATH, NEWPATH) < 0)  perror ("rename");
>   
----
    What are you trying to do by renaming the oldfile
over the top of a still-open-for-write, "newfile".

    Why rename over the top of another file?  What are you trying
to do?  Maybe there is a better way to do it?  ;-). 

--
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

- Raw text -