Function main

src/tee.c:128–189

}

int
main (int argc, char **argv)
{
  initialize_main (&argc, &argv);
  set_program_name (argv[0]);
  setlocale (LC_ALL, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  atexit (close_stdout);

  int optc;
  while ((optc = getopt_long (argc, argv, "aip", long_options, NULL)) != -1)
    {
      switch (optc)
        {
        case 'a':
          append = true;
          break;

        case 'i':
          ignore_interrupts = true;
          break;

        case 'p':
          if (optarg)
            output_error = XARGMATCH ("--output-error", optarg,
                                      output_error_args, output_error_types);
          else
            output_error = output_error_warn_nopipe;
          break;

        case_GETOPT_HELP_CHAR;

        case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);

        default:
          usage (EXIT_FAILURE);
        }
    }

  if (ignore_interrupts)
    signal (SIGINT, SIG_IGN);

  if (output_error != output_error_sigpipe)
    signal (SIGPIPE, SIG_IGN);

  /* Whether to detect and close a broken pipe output.
     There is no need if the input is always ready for reading.  */
  bool pipe_check = ((output_error == output_error_warn_nopipe
                      || output_error == output_error_exit_nopipe)
                     && iopoll_input_ok (STDIN_FILENO));

  /* Do *not* warn if tee is given no file arguments.
     POSIX requires that it work when given no arguments.  */

  bool ok = tee_files (argc - optind, &argv[optind], pipe_check);
  if (close (STDIN_FILENO) != 0)