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diff --git a/include/stdio_ext.h b/include/stdio_ext.h
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+/* Functions to access FILE structure internals.
+ Copyright (C) 2000, 2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* This header contains the same definitions as the header of the same name
+ on Sun's Solaris OS. */
+
+#ifndef _STDIO_EXT_H
+#define _STDIO_EXT_H 1
+
+#include <stdio.h>
+
+enum
+{
+ /* Query current state of the locking status. */
+ FSETLOCKING_QUERY = 0,
+#define FSETLOCKING_QUERY FSETLOCKING_QUERY
+ /* The library protects all uses of the stream functions, except for
+ uses of the *_unlocked functions, by calls equivalent to flockfile(). */
+ FSETLOCKING_INTERNAL,
+#define FSETLOCKING_INTERNAL FSETLOCKING_INTERNAL
+ /* The user will take care of locking. */
+ FSETLOCKING_BYCALLER
+#define FSETLOCKING_BYCALLER FSETLOCKING_BYCALLER
+};
+
+
+__BEGIN_DECLS
+
+/* Return the size of the buffer of FP in bytes currently in use by
+ the given stream. */
+extern size_t __fbufsize (FILE *__fp);
+
+
+/* Return non-zero value iff the stream FP is opened readonly, or if the
+ last operation on the stream was a read operation. */
+extern int __freading (FILE *__fp);
+
+/* Return non-zero value iff the stream FP is opened write-only or
+ append-only, or if the last operation on the stream was a write
+ operation. */
+extern int __fwriting (FILE *__fp);
+
+
+/* Return non-zero value iff stream FP is not opened write-only or
+ append-only. */
+extern int __freadable (FILE *__fp);
+
+/* Return non-zero value iff stream FP is not opened read-only. */
+extern int __fwritable (FILE *__fp);
+
+
+/* Return non-zero value iff the stream FP is line-buffered. */
+extern int __flbf (FILE *__fp);
+
+
+/* Discard all pending buffered I/O on the stream FP. */
+extern void __fpurge (FILE *__fp);
+
+/* Return amount of output in bytes pending on a stream FP. */
+extern size_t __fpending (FILE *__fp);
+
+/* Flush all line-buffered files. */
+extern void _flushlbf (void);
+
+
+/* Set locking status of stream FP to TYPE. */
+extern int __fsetlocking (FILE *__fp, int __type);
+
+__END_DECLS
+
+#endif /* stdio_ext.h */