#include <dirent.h>

#include <errno.h>

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/types.h>

int

main (void)

{

  DIR *dirp;

  struct dirent* ent;

  /* open a dir stream */

  dirp = opendir ("/tmp");

  if (dirp == NULL)

    {

      if (errno == ENOENT)

	exit (0);

      perror ("opendir");

      exit (1);

    }

  /* close the directory file descriptor, making it invalid */

  if (close (dirfd (dirp)) != 0)

    {

      puts ("could not close directory file descriptor");

      /* This is not an error.  It is not guaranteed this is possible.  */

      return 0;

    }

  ent = readdir (dirp);

  return ent != NULL || errno != EBADF;

}