1/*
2 * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23#include <unistd.h>
24#include <stdarg.h>
25#include <sys/msg.h>
26
27/*
28 * Stub function to account for the differences in the ipc_perm structure,
29 * while maintaining binary backward compatibility.
30 *
31 * This is only the legacy behavior.
32 */
33extern int __msgctl(int, int, struct msqid_ds *);
34
35int
36msgctl(int msqid, int cmd, struct msqid_ds *ds)
37{
38	struct __msqid_ds_old	*ds_old = (struct __msqid_ds_old *)ds;
39	struct __msqid_ds_new	ds2;
40	struct __msqid_ds_new	*ds_new = &ds2;
41	int			rv;
42
43#define	_UP_CVT(x)	ds_new-> x = ds_old-> x
44#define	_DN_CVT(x)	ds_old-> x = ds_new-> x
45
46	if (cmd == IPC_SET) {
47		/* convert before call */
48		_UP_CVT(msg_perm.uid);
49		_UP_CVT(msg_perm.gid);
50		_UP_CVT(msg_perm.cuid);
51		_UP_CVT(msg_perm.cgid);
52		_UP_CVT(msg_perm.mode);
53		ds_new->msg_perm._seq = ds_old->msg_perm.seq;
54		ds_new->msg_perm._key = ds_old->msg_perm.key;
55		_UP_CVT(msg_first);
56		_UP_CVT(msg_last);
57		_UP_CVT(msg_cbytes);
58		_UP_CVT(msg_qnum);
59		_UP_CVT(msg_qbytes);
60		_UP_CVT(msg_lspid);
61		_UP_CVT(msg_lrpid);
62		_UP_CVT(msg_stime);
63		_UP_CVT(msg_pad1);	/* binary compatibility */
64		_UP_CVT(msg_rtime);
65		_UP_CVT(msg_pad2);	/* binary compatibility */
66		_UP_CVT(msg_ctime);
67		_UP_CVT(msg_pad3);	/* binary compatibility */
68		_UP_CVT(msg_pad4[0]);	/* binary compatibility */
69		_UP_CVT(msg_pad4[1]);	/* binary compatibility */
70		_UP_CVT(msg_pad4[2]);	/* binary compatibility */
71		_UP_CVT(msg_pad4[3]);	/* binary compatibility */
72	}
73
74	rv = __msgctl(msqid, cmd, ds_new);
75
76	if (cmd == IPC_STAT) {
77		/* convert after call */
78		_DN_CVT(msg_perm.uid);	/* warning!  precision loss! */
79		_DN_CVT(msg_perm.gid);	/* warning!  precision loss! */
80		_DN_CVT(msg_perm.cuid);	/* warning!  precision loss! */
81		_DN_CVT(msg_perm.cgid);	/* warning!  precision loss! */
82		_DN_CVT(msg_perm.mode);
83		ds_old->msg_perm.seq = ds_new->msg_perm._seq;
84		ds_old->msg_perm.key = ds_new->msg_perm._key;
85		_DN_CVT(msg_first);
86		_DN_CVT(msg_last);
87		_DN_CVT(msg_cbytes);
88		_DN_CVT(msg_qnum);
89		_DN_CVT(msg_qbytes);
90		_DN_CVT(msg_lspid);
91		_DN_CVT(msg_lrpid);
92		_DN_CVT(msg_stime);
93		_DN_CVT(msg_pad1);	/* binary compatibility */
94		_DN_CVT(msg_rtime);
95		_DN_CVT(msg_pad2);	/* binary compatibility */
96		_DN_CVT(msg_ctime);
97		_DN_CVT(msg_pad3);	/* binary compatibility */
98		_DN_CVT(msg_pad4[0]);	/* binary compatibility */
99		_DN_CVT(msg_pad4[1]);	/* binary compatibility */
100		_DN_CVT(msg_pad4[2]);	/* binary compatibility */
101		_DN_CVT(msg_pad4[3]);	/* binary compatibility */
102	}
103
104	return (rv);
105}
106