Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
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
To: cygwin AT cygwin DOT com
Subject: Re: mkstemp bug
Mail-Copies-To: never
Reply-To: sds AT gnu DOT org
X-Attribution: Sam
X-Disclaimer: You should not expect anyone to agree with me.
From: Sam Steingold <sds AT gnu DOT org>
In-Reply-To: <usm1cb0aa.fsf@gnu.org> (Sam Steingold's message of "Wed, 27 Apr 2005 13:24:29 -0400")
References: <usm1cb0aa DOT fsf AT gnu DOT org>
Mail-Followup-To: cygwin AT cygwin DOT com
Date: Wed, 27 Apr 2005 18:06:09 -0400
Message-ID: <u8y33c1ta.fsf@gnu.org>
User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (windows-nt)
MIME-Version: 1.0
Content-Type: text/plain

> * Sam Steingold <fqf AT tah DOT bet> [2005-04-27 13:24:29 -0400]:
>
> it appears that mkstemp() returns a temp FD pointing to the same file:
> mkstemp ("/tmp/clisp-x-io-XXXXXX");
> ==> "/tmp/clisp-x-io-000592"
> mkstemp ("/tmp/clisp-x-io-XXXXXX");
> ==> "/tmp/clisp-x-io-000592"
> mkstemp ("/tmp/clisp-x-io-XXXXXX");
> ==> "/tmp/clisp-x-io-000592"

this is note quite as easy to reproduce.  sorry.

the problem is that mkstemp() does not regard FIFOs (as created by
mkfifo() or mknod()) as existing files.

e.g.

  char s1[] = "/tmp/foo-XXXXXX";
  char s2[] = "/tmp/foo-XXXXXX";
  int fd = mkstemp(s1);
  close(fd); remove(s1);
  mkfifo(s1,0644);
  mkstemp(s2);
  strcmp(s1,s2) ===> 0

-- 
Sam Steingold (http://www.podval.org/~sds) running w2k
<http://www.openvotingconsortium.org/> <http://www.camera.org>
<http://www.jihadwatch.org/> <http://www.memri.org/> <http://pmw.org.il/>
Do not worry about which side your bread is buttered on: you eat BOTH sides.

--
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/