--- /dev/null
+++ Libc/Libc-391/include/grp.h
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*-
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)grp.h	8.2 (Berkeley) 1/21/94
+ */
+
+#ifndef _GRP_H_
+#define	_GRP_H_
+
+#include <_types.h>
+
+#ifndef _GID_T
+typedef __darwin_gid_t	gid_t;		/* [XBD] */
+#define _GID_T
+#endif
+
+/*
+ * Although the definition of size_t is not mandated by [TSF], the function
+ * prototypes defined by [TSF] for the thread reentrant functions include
+ * it as a type for their 4th arguments, so we define it here.
+ */
+#ifndef _SIZE_T
+#define _SIZE_T
+typedef __darwin_size_t	size_t;		/* [???] */
+#endif
+
+#ifndef _POSIX_C_SOURCE
+#define	_PATH_GROUP		"/etc/group"
+#endif
+
+struct group {
+	char	*gr_name;		/* [XBD] group name */
+	char	*gr_passwd;		/* [???] group password */
+	gid_t	gr_gid;			/* [XBD] group id */
+	char	**gr_mem;		/* [XBD] group members */
+};
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+/* [XBD] */
+struct group *getgrgid(gid_t);
+struct group *getgrnam(const char *);
+/* [TSF] */
+int getgrgid_r(gid_t, struct group *, char *, size_t, struct group **);
+int getgrnam_r(const char *, struct group *, char *, size_t, struct group **);
+/* [XSI] */
+struct group *getgrent(void);
+int setgrent(void);
+void endgrent(void);
+
+#ifndef _POSIX_C_SOURCE
+#ifndef _XOPEN_SOURCE
+char *group_from_gid(gid_t, int);
+#endif
+void setgrfile(const char *);
+int setgroupent(int);
+#endif
+__END_DECLS
+
+#endif /* !_GRP_H_ */