new file mode 100644
--- /dev/null
+++ b/packages/language/c/libc/current/src/stdio/common/setvbuf.cxx
@@ -0,0 +1,131 @@
+//===========================================================================
+//
+//      setvbuf.cxx
+//
+//      Implementation of C library buffering setup as per ANSI 7.9.5.6
+//
+//===========================================================================
+//####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:       
+//
+//####DESCRIPTIONEND####
+//
+//===========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/libc.h>   // Configuration header
+
+
+// Include the C library? And do we want the stdio stuff?
+#if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_STDIO)
+
+// INCLUDES
+
+#include <cyg/infra/cyg_type.h>     // Common project-wide type definitions
+#include <stddef.h>                 // NULL and size_t from compiler
+#include <errno.h>                  // Error codes
+#include <stdio.h>                  // header for setvbuf()
+#include "clibincl/stream.hxx"      // C libray streams
+#include "clibincl/stdiosupp.hxx"   // support for stdio
+
+
+// EXPORTED SYMBOLS
+
+externC int
+setvbuf( FILE *, char *, int, size_t ) CYGPRI_LIBC_WEAK_ALIAS("_setvbuf");
+
+
+// FUNCTIONS
+
+
+externC int
+_setvbuf( FILE *stream, char *buf, int mode, size_t size )
+{
+#ifdef CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO
+
+    Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream;
+    Cyg_ErrNo err;
+    
+#ifdef CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS
+    if ( !real_stream->lock_me() ) {
+        errno = EBADF;
+        return EBADF;
+    } // if
+#endif
+
+    err = real_stream->io_buf.set_buffer( (cyg_ucount32) size, 
+                                          (cyg_uint8 *) buf );
+    if (!err) {
+        switch (mode) {
+        case _IONBF:
+            CYG_ASSERT( (size == 0) && (buf == NULL),
+                        "No buffering wanted but size/address specified!" );
+            real_stream->flags.buffering = false;
+            real_stream->flags.line_buffering = false;
+            break;
+        case _IOLBF:
+            real_stream->flags.buffering = true;
+            real_stream->flags.line_buffering = true;
+            break;
+        case _IOFBF:
+            real_stream->flags.buffering = true;
+            real_stream->flags.line_buffering = false;
+            break;
+        default:
+            err = EINVAL;
+            break;
+        } // switch
+    } // if
+
+#ifdef CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS
+    real_stream->unlock_me();
+#endif
+    
+    if (err) {
+        errno = err;
+        return err;
+    } // if
+        
+    return 0;
+
+#else // ifdef CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO
+
+    errno = ENOSUPP;
+    return ENOSUPP;
+
+#endif // ifdef CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO
+
+} // _setvbuf()
+
+#endif // if defined(CYGPKG_LIBC) && defined(CYGPKG_LIBC_STDIO)
+
+// EOF setvbuf.cxx