Function main

src/tty.c:81–137

}

int
main (int argc, char **argv)
{
  int optc;

  initialize_main (&argc, &argv);
  set_program_name (argv[0]);
  setlocale (LC_ALL, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  initialize_exit_failure (TTY_WRITE_ERROR);
  atexit (close_stdout);

  while ((optc = getopt_long (argc, argv, "s", longopts, NULL)) != -1)
    {
      switch (optc)
        {
        case 's':
          silent = true;
          break;

        case_GETOPT_HELP_CHAR;

        case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);

        default:
          usage (TTY_USAGE);
        }
    }

  if (optind < argc)
    {
      error (0, 0, _("extra operand %s"), quote (argv[optind]));
      usage (TTY_USAGE);
    }

  if (silent)
    return isatty (STDIN_FILENO) ? EXIT_SUCCESS : TTY_STDIN_NOTTY;

  int status;
  char const *tty = ttyname (STDIN_FILENO);

  if (tty)
    status = EXIT_SUCCESS;
  else
    {
      int ttyname_err = errno;
      if (isatty (STDIN_FILENO))
        error (TTY_TTYNAME_FAILURE, ttyname_err, _("ttyname error"));
      tty = _("not a tty");
      status = TTY_STDIN_NOTTY;
    }

  puts (tty);
  return status;
}