Also wrap stdin/stdout/stderr on Process.

sdk/lib/io/stdio.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.
 
 part of dart.io;
 
 const int _STDIO_HANDLE_TYPE_TERMINAL = 0;
 const int _STDIO_HANDLE_TYPE_PIPE = 1;
 const int _STDIO_HANDLE_TYPE_FILE = 2;
 const int _STDIO_HANDLE_TYPE_SOCKET = 3;
 const int _STDIO_HANDLE_TYPE_OTHER = 4;
 
-class _Stdin extends Stream<List<int>> {
-  final Stream<List<int>> _stdin;
+class _StdStream extends Stream<List<int>> {
+  final Stream<List<int>> _stream;
 
-  _Stdin(Stream<List<int>> this._stdin);
+  _StdStream(Stream<List<int>> this._stream);
 
   StreamSubscription<List<int>> listen(void onData(List<int> event),
                                        {void onError(AsyncError error),
                                         void onDone(),
                                         bool unsubscribeOnError}) {
-    return _stdin.listen(
+    return _stream.listen(
         onData,
         onError: onError,
         onDone: onDone,
         unsubscribeOnError: unsubscribeOnError);
   }
 }
 
 class _StdSink implements IOSink {
-  final IOSink _ioSink;
+  final IOSink _sink;
 
-  _StdSink(IOSink this._ioSink);
+  _StdSink(IOSink this._sink);
 
-  Encoding get encoding => _ioSink.encoding;
+  Encoding get encoding => _sink.encoding;
   void set encoding(Encoding encoding) {
-    _ioSink.encoding = encoding;
+    _sink.encoding = encoding;
   }
-  void write(object) => _ioSink.write(object);
-  void writeln([object = "" ]) => _ioSink.writeln(object);
-  void writeAll(objects, [sep = ""]) => _ioSink.writeAll(objects, sep);
-  void writeBytes(List<int> data) => _ioSink.writeBytes(data);
-  void writeCharCode(int charCode) => _ioSink.writeCharCode(charCode);
-  Future consume(Stream<List<int>> stream) => _ioSink.consume(stream);
-  Future addStream(Stream<List<int>> stream) => _ioSink.addStream(stream);
-  Future writeStream(Stream<List<int>> stream)
-      => _ioSink.writeStream(stream);
-  Future close() => _ioSink.close();
-  Future get done => _ioSink.done;
+  void write(object) => _sink.write(object);
+  void writeln([object = "" ]) => _sink.writeln(object);
+  void writeAll(objects, [sep = ""]) => _sink.writeAll(objects, sep);
+  void writeBytes(List<int> data) => _sink.writeBytes(data);
+  void writeCharCode(int charCode) => _sink.writeCharCode(charCode);
+  Future consume(Stream<List<int>> stream) => _sink.consume(stream);
+  Future addStream(Stream<List<int>> stream) => _sink.addStream(stream);
+  Future writeStream(Stream<List<int>> stream) => _sink.writeStream(stream);
+  Future close() => _sink.close();
+  Future get done => _sink.done;
 }
 
 class StdioType {
   static const StdioType TERMINAL = const StdioType._("terminal");
   static const StdioType PIPE = const StdioType._("pipe");
   static const StdioType FILE = const StdioType._("file");
   static const StdioType OTHER = const StdioType._("other");
   final String name;
   const StdioType._(String this.name);
   String toString() => "StdioType: $name";
@@ skipping 23 matching lines @@
 
 IOSink get stderr {
   if (_stderr == null) {
     _stderr = _StdIOUtils._getStdioOutputStream(2);
   }
   return _stderr;
 }
 
 
 StdioType stdioType(object) {
-  if (object is _Stdin) {
-    object = object._stdin;
+  if (object is _StdStream) {
+    object = object._stream;
   } else if (object is _StdSink) {
-    object = object._ioSink;
+    object = object._sink;
   }
   if (object is _FileStream) {
     return StdioType.FILE;
   }
   if (object is Socket) {
     switch (_StdIOUtils._socketType(object._nativeSocket)) {
       case _STDIO_HANDLE_TYPE_TERMINAL: return StdioType.TERMINAL;
       case _STDIO_HANDLE_TYPE_PIPE: return StdioType.PIPE;
       case _STDIO_HANDLE_TYPE_FILE:  return StdioType.FILE;
     }
   }
   if (object is IOSink) {
     try {
       if (object._target is _FileStreamConsumer) {
         return StdioType.FILE;
       }
     } catch (e) {
       // Only the interface implemented, _sink not available.
     }
   }
   return StdioType.OTHER;
 }
 
 
 class _StdIOUtils {
   external static IOSink _getStdioOutputStream(int fd);
   external static Stream<List<int>> _getStdioInputStream();
   external static int _socketType(nativeSocket);
 }