Merge "Enhance the ioctl toolbox command"

        exit(1);

    }

    fd = open(argv[optind], O_RDWR | O_SYNC);

    if (!strcmp(argv[optind], "-")) {

        fd = STDIN_FILENO;

    } else {

        fd = open(argv[optind], read_only ? O_RDONLY : (O_RDWR | O_SYNC));

        if (fd < 0) {

            fprintf(stderr, "cannot open %s\n", argv[optind]);

            return 1;

        }

    }

    optind++;

    ioctl_nr = strtol(argv[optind], NULL, 0);