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Date:	Wed, 27 Apr 2005 18:20:31 -0400
From:	Christopher Faylor <cgf-no-personal-reply-please AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: mkstemp bug
Message-ID:	<20050427222031.GB24021@trixie.casa.cgf.cx>
Reply-To:	cygwin AT cygwin DOT com
References:	<usm1cb0aa DOT fsf AT gnu DOT org> <u8y33c1ta DOT fsf AT gnu DOT org>
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On Wed, Apr 27, 2005 at 06:06:09PM -0400, Sam Steingold wrote:
>> * 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

fifos just barely work under cygwin.  I wouldn't recommend using them.

cgf

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