From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Richard W.M. Jones" <rjones@redhat.com>
Subject: Re: Another bug, in dup3
Date: Tue, 9 Oct 2012 10:25:50 +0100
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Simple reproducer attached.

Rich.

--=20
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjon=
es
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/* Test if dup3 works right.
 * by Richard W.M. Jones.
 */

#define _GNU_SOURCE

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <assert.h>

int
main ()
{
  char *file = "/tmp/dup3.tmp";
  int fd = creat (file, 0600);

  assert (fd >= 0);

  if (dup3 (fd, fd, 0) != -1) {
    fprintf (stderr, "dup3 (fd, fd, 0) didn't fail!\n");
    exit (EXIT_FAILURE);
  }

  exit (EXIT_SUCCESS);
}

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