new file mode 100644
--- /dev/null
+++ b/packages/language/c/libc/current/include/sys/file_if.h
@@ -0,0 +1,68 @@
+#ifndef CYGONCE_LIBC_FILE_IF_H
+#define CYGONCE_LIBC_FILE_IF_H
+//===========================================================================
+//
+//      file_if.h
+//
+//      File interface definitions
+//
+//===========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//===========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   jlarmour
+// Contributors:  jlarmour@cygnus.co.uk
+// Date:        1998-02-13
+// Purpose:     
+// Description: 
+// Usage:       #include <sys/file_if.h>
+//
+//####DESCRIPTIONEND####
+//
+//===========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/libc.h>       // Configuration header
+
+// Include the C library?
+#ifdef CYGPKG_LIBC     
+
+// INCLUDES
+
+#include <cyg/infra/cyg_type.h>    // Common type definitions and support
+
+// TYPE DEFINITIONS
+
+typedef CYG_ADDRESS FILE; // This address is cast to an address here. It is
+                          // uncast internally to the C library in stream.hxx
+                          // as the C++ Cyg_StdioStream class. Optional
+                          // run-time checking can be enabled to ensure that
+                          // the cast is valid
+
+#endif // ifdef CYGPKG_LIBC
+
+#endif // CYGONCE_LIBC_FILE_IF_H multiple inclusion protection
+
+// EOF file_if.h