[NaCl SDK] nacl_io: Enable isatty running under sel_ldr.

native_client_sdk/src/libraries/nacl_io/node.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "nacl_io/node.h"
 
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <poll.h>
@@ skipping 166 matching lines @@
   stat_.st_mode &= ~S_IFMT;
   stat_.st_mode |= type;
 }
 
 bool Node::IsaDir() { return (stat_.st_mode & S_IFDIR) != 0; }
 
 bool Node::IsaFile() { return (stat_.st_mode & S_IFREG) != 0; }
 
 bool Node::IsaSock() { return (stat_.st_mode & S_IFSOCK) != 0; }
 
-bool Node::IsaTTY() { return (stat_.st_mode & S_IFCHR) != 0; }
+Error Node::Isatty() {
+  return ENOTTY;
+}
 
 Error Node::AddChild(const std::string& name, const ScopedNode& node) {
   return ENOTDIR;
 }
 
 Error Node::RemoveChild(const std::string& name) { return ENOTDIR; }
 
 Error Node::FindChild(const std::string& name, ScopedNode* out_node) {
   out_node->reset(NULL);
   return ENOTDIR;
 }
 
 int Node::ChildCount() { return 0; }
 
 void Node::Link() { stat_.st_nlink++; }
 
 void Node::Unlink() { stat_.st_nlink--; }
 
 }  // namespace nacl_io