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Date: Tue, 15 Jan 2008 11:15:28 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Defect report: ENOTSOCK on close
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On Jan 15 09:19, Christopher Yeleigton wrote:
> Summary:
> Unexpected error ENOTSOCK upon closing filedes[0] obtained via socketpair
>
> Test case:
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <sys/socket.h>
>
> int main(int argc, char *argv[])
> {
> auto int a_fd[02];
> if(socketpair(AF_LOCAL, SOCK_STREAM, 0, a_fd))
> perror("socketpair");
> else
> {
> auto int an_ix = 0;
> for(; an_ix < 02; ++an_ix)
> if(close(a_fd[an_ix]))
>   { enum BufLen { BUF_LEN = 040 };
> auto char a_buf[BUF_LEN];
> perror(snprintf(a_buf, BUF_LEN, "close %d", an_ix) > 0? a_buf:
> "sprintf"); }}
> return EXIT_SUCCESS; }
>
> Error message:
> close 0: Socket operation on non-socket
>
> (Note it occurs with filedes[0] only, even if close is called for 
> filedes[1]
> first).
>
> OpenBSD does not exhibit this malfunction.

I tried your test application multiple times on XP SP2, 2003 Server x64,
as well as on 2008 Server RC1.  I can not reproduce the above problem.
On all three machines (all running Cygwin 1.5.25-7), the sockets are
closed without failure every time.  Maybe that's a bad interaction with
a third party product?  Did you check the FAQ?

  http://cygwin.com/faq/faq.using.html#faq.using.bloda


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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