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diff --git a/libio/freopen.c b/libio/freopen.c
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+/*
+Copyright (C) 1993, 1995 Free Software Foundation
+
+This file is part of the GNU IO Library. This library is free
+software; you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+This 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this library; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+As a special exception, if you link this library with files
+compiled with a GNU compiler to produce an executable, this does not cause
+the resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why
+the executable file might be covered by the GNU General Public License. */
+
+#include "libioP.h"
+#include "stdio.h"
+
+FILE*
+freopen (filename, mode, fp)
+ const char* filename;
+ const char* mode;
+ FILE* fp;
+{
+ CHECK_FILE (fp, NULL);
+ if (!(fp->_flags & _IO_IS_FILEBUF))
+ return NULL;
+ return _IO_freopen (filename, mode, fp);
+}