Better handling of stdin/stdout/stderr

runtime/bin/eventhandler_macos.h

 // Copyright (c) 2011, 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.
 
 #ifndef BIN_EVENTHANDLER_MACOS_H_
 #define BIN_EVENTHANDLER_MACOS_H_
 
 #include <unistd.h>
 #include <sys/socket.h>
 
@@ skipping 32 matching lines @@
   }
 
   void Close() {
     Unregister();
     flags_ = 0;
     close(fd_);
     fd_ = 0;
   }
 
   bool IsListeningSocket() { return (mask_ & (1 << kListeningSocket)) != 0; }
+  bool IsPipe() { return (mask_ & (1 << kPipe)) != 0; }
   bool IsClosedRead() { return (flags_ & (1 << kClosedRead)) != 0; }
   bool IsClosedWrite() { return (flags_ & (1 << kClosedWrite)) != 0; }
 
   void MarkClosedRead() { flags_ |= (1 << kClosedRead); }
   void MarkClosedWrite() { flags_ |= (1 << kClosedWrite); }
 
   bool HasPollEvents() { return mask_ != 0; }
 
   void SetPortAndMask(Dart_Port port, intptr_t mask) {
     port_ = port;
@@ skipping 36 matching lines @@
 
   SocketData* socket_map_;
   intptr_t socket_map_size_;
   int64_t timeout_;  // Time for next timeout.
   Dart_Port timeout_port_;
   int interrupt_fds_[2];
 };
 
 
 #endif  // BIN_EVENTHANDLER_MACOS_H_