Error reporting on File in dart:io

runtime/bin/utils_linux.cc

Index: runtime/bin/utils_linux.cc
diff --git a/runtime/bin/utils_linux.cc b/runtime/bin/utils_linux.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f57a15bb8aaea74931b28c4e342dc0a160ccf868
--- /dev/null
+++ b/runtime/bin/utils_linux.cc
@@ -0,0 +1,12 @@
+// Copyright (c) 2012, 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.
+
+#include <errno.h>
+
+#include "bin/utils.h"
+
+OSError::OSError() : code_(0), message_(NULL) {
+  set_code(errno);
+  SetMessage(strerror(errno));
+}