Simple reproducer attached.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines. Boot with a
live CD or over the network (PXE) and turn machines into Xen guests.
http://et.redhat.com/~rjones/virt-p2v
/* 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);
}
