--- /dev/null
+++ Libc/Libc-1506.40.4/sys/msgctl.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2004 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@
+ */
+#include <unistd.h>
+#include <stdarg.h>
+#include <sys/msg.h>
+
+/*
+ * Stub function to account for the differences in the ipc_perm structure,
+ * while maintaining binary backward compatibility.
+ *
+ * This is only the legacy behavior.
+ */
+extern int __msgctl(int, int, struct msqid_ds *);
+
+int
+msgctl(int msqid, int cmd, struct msqid_ds *ds)
+{
+	struct __msqid_ds_old	*ds_old = (struct __msqid_ds_old *)ds;
+	struct __msqid_ds_new	ds2;
+	struct __msqid_ds_new	*ds_new = &ds2;
+	int			rv;
+
+#define	_UP_CVT(x)	ds_new-> x = ds_old-> x
+#define	_DN_CVT(x)	ds_old-> x = ds_new-> x
+
+	if (cmd == IPC_SET) {
+		/* convert before call */
+		_UP_CVT(msg_perm.uid);
+		_UP_CVT(msg_perm.gid);
+		_UP_CVT(msg_perm.cuid);
+		_UP_CVT(msg_perm.cgid);
+		_UP_CVT(msg_perm.mode);
+		ds_new->msg_perm._seq = ds_old->msg_perm.seq;
+		ds_new->msg_perm._key = ds_old->msg_perm.key;
+		_UP_CVT(msg_first);
+		_UP_CVT(msg_last);
+		_UP_CVT(msg_cbytes);
+		_UP_CVT(msg_qnum);
+		_UP_CVT(msg_qbytes);
+		_UP_CVT(msg_lspid);
+		_UP_CVT(msg_lrpid);
+		_UP_CVT(msg_stime);
+		_UP_CVT(msg_pad1);	/* binary compatibility */
+		_UP_CVT(msg_rtime);
+		_UP_CVT(msg_pad2);	/* binary compatibility */
+		_UP_CVT(msg_ctime);
+		_UP_CVT(msg_pad3);	/* binary compatibility */
+		_UP_CVT(msg_pad4[0]);	/* binary compatibility */
+		_UP_CVT(msg_pad4[1]);	/* binary compatibility */
+		_UP_CVT(msg_pad4[2]);	/* binary compatibility */
+		_UP_CVT(msg_pad4[3]);	/* binary compatibility */
+	}
+
+	rv = __msgctl(msqid, cmd, ds_new);
+
+	if (cmd == IPC_STAT) {
+		/* convert after call */
+		_DN_CVT(msg_perm.uid);	/* warning!  precision loss! */
+		_DN_CVT(msg_perm.gid);	/* warning!  precision loss! */
+		_DN_CVT(msg_perm.cuid);	/* warning!  precision loss! */
+		_DN_CVT(msg_perm.cgid);	/* warning!  precision loss! */
+		_DN_CVT(msg_perm.mode);
+		ds_old->msg_perm.seq = ds_new->msg_perm._seq;
+		ds_old->msg_perm.key = ds_new->msg_perm._key;
+		_DN_CVT(msg_first);
+		_DN_CVT(msg_last);
+		_DN_CVT(msg_cbytes);
+		_DN_CVT(msg_qnum);
+		_DN_CVT(msg_qbytes);
+		_DN_CVT(msg_lspid);
+		_DN_CVT(msg_lrpid);
+		_DN_CVT(msg_stime);
+		_DN_CVT(msg_pad1);	/* binary compatibility */
+		_DN_CVT(msg_rtime);
+		_DN_CVT(msg_pad2);	/* binary compatibility */
+		_DN_CVT(msg_ctime);
+		_DN_CVT(msg_pad3);	/* binary compatibility */
+		_DN_CVT(msg_pad4[0]);	/* binary compatibility */
+		_DN_CVT(msg_pad4[1]);	/* binary compatibility */
+		_DN_CVT(msg_pad4[2]);	/* binary compatibility */
+		_DN_CVT(msg_pad4[3]);	/* binary compatibility */
+	}
+
+	return (rv);
+}