// Stupid code segment
  
  // Open file.  Contents of "source" and "mode" unknown...
  fd = open(source, O_RDWR | O_CREAT, mode);

  // Don't check success of "open()".  Just try to "dup2()" descriptor, regardless
  if(dup2(fd, 0) < 0)
    // If "dup2()' FAILS, then treat it as SUCCESS and try a second "open()"
    fd2 = open(destination, O_RDWR | O_CREAT, mode);
  // Do a second "dup2()"
  if (dup2(fd2, 1) < 0)
    // Only close "fd" if dup2 fails...
    close(fd);
  // but close fd2 all the time
  close (fd2);

/*
 * simple test: redirect stdin from first file, redirect stdout to second
 */
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/fcntl.h>

int
main (int argc, char *argv[])
{
  int fd1, fd2;
  char buf[1024];
  int i;

  /* Chk cmd-line args */
  if (argc < 3)
  {
    printf ("USAGE: myprog <infile> <outfile>!\n");
    return 1;
  }

  /* This redirects stdin (descriptor 0) from specified file */
  close (0);
  fd1 = open (argv[1], O_RDONLY);
  if (fd1 < 0)
  {
    perror ("Unable to redirect input!");
    return 1;
  }

  /* This redirects stdout (descriptor 1) to specified file */
  close (1);
  fd2 = open (argv[2], O_WRONLY|O_CREAT);
  if (fd2 < 0)
  {
    perror ("Unable to redirect output!");
    return 1;
  }

  /* Now simply copy the file contents */
  while ((i = read(fd1, buf, sizeof (buf))) > 0)
  {
    write (fd2, buf, i);
  }

  /* Close up show and exit */
  close (1);
  close (0);
  return 0;
}