[NaCl SDK] nacl_io: Remove duplication between passthroughfs and devfs.

native_client_sdk/src/libraries/nacl_io/passthroughfs/real_node.h

Index: native_client_sdk/src/libraries/nacl_io/passthroughfs/real_node.h
diff --git a/native_client_sdk/src/libraries/nacl_io/passthroughfs/real_node.h b/native_client_sdk/src/libraries/nacl_io/passthroughfs/real_node.h
new file mode 100644
index 0000000000000000000000000000000000000000..2bc3ac184c4cefb58987ab32ed9d682c0182fc02
--- /dev/null
+++ b/native_client_sdk/src/libraries/nacl_io/passthroughfs/real_node.h
@@ -0,0 +1,52 @@
+// Copyright 2014 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.
+//
+#ifndef LIBRARIES_NACL_IO_PASSTHROUGHFS_REAL_NODE_H_
+#define LIBRARIES_NACL_IO_PASSTHROUGHFS_REAL_NODE_H_
+
+#include "nacl_io/node.h"
+
+namespace nacl_io {
+
+class RealNode : public Node {
+ public:
+  RealNode(Filesystem* filesystem, int real_fd, bool close_on_destroy = false);
+
+ protected:
+  virtual Error Init(int flags) { return 0; }
+
+  virtual void Destroy();
+
+ public:
+  // Normal read/write operations on a file
+  virtual Error Read(const HandleAttr& attr,
+                     void* buf,
+                     size_t count,
+                     int* out_bytes);
+  virtual Error Write(const HandleAttr& attr,
+                      const void* buf,
+                      size_t count,
+                      int* out_bytes);
+  virtual Error FTruncate(off_t size);
+  virtual Error GetDents(size_t offs,
+                         struct dirent* pdir,
+                         size_t count,
+                         int* out_bytes);
+  virtual Error GetStat(struct stat* stat);
+  virtual Error Isatty();
+  virtual Error MMap(void* addr,
+                     size_t length,
+                     int prot,
+                     int flags,
+                     size_t offset,
+                     void** out_addr);
+
+ private:
+  int real_fd_;
+  bool close_on_destroy_;
+};
+
+}  // namespace nacl_io
+
+#endif  // LIBRARIES_NACL_IO_PASSTHROUGHFS_REAL_NODE_H_