/* Test if dup3 returns EBADF for bad fds.
 * by Richard W.M. Jones.
 */

#define _GNU_SOURCE

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

int
main ()
{
  char *file = "/dev/null";
  int fd = open (file, O_RDONLY);
  int r, errors = 0;

  assert (fd >= 0);

  r = dup3 (fd, -2, 0);
  if (r != -1 || errno != EBADF) {
    fprintf (stderr, "failed: dup3 (fd, -2, 0) => %d, errno = %d (%s)\n",
	     r, errno, strerror (errno));
    errors++;
  }

  r = dup3 (fd, 1000000, 0);
  if (r != -1 || errno != EBADF) {
    fprintf (stderr, "failed: dup3 (fd, 1000000, 0) => %d, errno = %d (%s)\n",
	     r, errno, strerror (errno));
    errors++;
  }

  /* Also test dup2 */
  r = dup2 (fd, -2);
  if (r != -1 || errno != EBADF) {
    fprintf (stderr, "failed: dup2 (fd, -2) => %d, errno = %d (%s)\n",
	     r, errno, strerror (errno));
    errors++;
  }

  r = dup2 (fd, 1000000);
  if (r != -1 || errno != EBADF) {
    fprintf (stderr, "failed: dup2 (fd, 1000000) => %d, errno = %d (%s)\n",
	     r, errno, strerror (errno));
    errors++;
  }

  exit (errors == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}