fifo.c

  /* Creates fifo */
  mkfifo(argv[1], S_IRWXU | S_IRWXG | S_IRWXO);
  int fifo = open(argv[1], O_RDONLY);

  /* Duplicate the file 'fifo', so that file descriptor 0 points to it.
   * Note that 0 is the file descriptor of stdin. */
  dup2(fifo, 0);

  char line[1024];
  int i = 0;
  printf("Reading File %s\n", argv[1]);
  while(fgets(line, 1024, stdin))
    printf("%3d| %s", i++, line);
  printf("\n");