tests/standalone_2/io/process_std_io_script.dart

// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
//
// Utility script to echo stdin to stdout or stderr or both.

// @dart = 2.9

import "dart:io";

main(List<String> arguments) {
  if (arguments.length > 0) {
    if (arguments[0] == "0") {
      stdin.pipe(stdout);
    } else if (arguments[0] == "1") {
      stdin.pipe(stderr);
    } else if (arguments[0] == "2") {
      stdin.listen((data) {
        stdout.add(data);
        stderr.add(data);
      });
    }
  }
}