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diff --git a/posix/wordexp.h b/posix/wordexp.h
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+/* Copyright (C) 1991, 1992 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#ifndef	_WORDEXP_H
+
+#define	_WORDEXP_H	1
+#include <features.h>
+
+__BEGIN_DECLS
+
+/* Bits set in the FLAGS argument to `wordexp'.  */
+enum
+  {
+    WRDE_DOOFFS = (1 << 0),	/* Insert PWORDEXP->we_offs NULLs.  */
+    WRDE_APPEND = (1 << 1),	/* Append to results of a previous call.  */
+    WRDE_NOCMD = (1 << 2),	/* Don't do command substitution.  */
+    WRDE_REUSE = (1 << 3),	/* Reuse storage in PWORDEXP.  */
+    WRDE_SHOWERR = (1 << 4),	/* Don't redirect stderr to /dev/null.  */
+    WRDE_UNDEF = (1 << 5),	/* Error for expanding undefined variables.  */
+    __WRDE_FLAGS = (WRDE_DOOFFS | WRDE_APPEND | WRDE_NOCMD |
+		    WRDE_REUSE | WRDE_SHOWERR | WRDE_UNDEF),
+  };
+
+/* Structure describing a word-expansion run.  */
+typedef struct
+  {
+    int we_wordc;		/* Count of words matched.  */
+    char **we_wordv;		/* List of expanded words.  */
+    int we_offs;		/* Slots to reserve in `we_wordv'.  */
+  } wordexp_t;
+
+/* Possible nonzero return values from `wordexp'.  */
+enum
+  {
+    WRDE_NOSPACE = 1,		/* Ran out of memory.  */
+    WRDE_BADCHAR,		/* A metachar appears in the wrong place.  */
+    WRDE_BADVAL,		/* Undefined var reference with WRDE_UNDEF.  */
+    WRDE_CMDSUB,		/* Command substitution with WRDE_NOCMD.  */
+    WRDE_SYNTAX			/* Shell syntax error.  */
+  };
+
+/* Do word expansion of WORDS into PWORDEXP.  */
+extern int wordexp __P ((__const char *__words, wordexp_t * __pwordexp,
+			 int __flags));
+
+/* Free the storage allocated by a `wordexp' call.  */
+extern void wordfree __P ((wordexp_t *));
+
+__END_DECLS
+
+#endif /* wordexp.h  */