[apple/libc.git] / sys / msgctl.c

/*
 * 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>
#include <sys/syscall.h>

/*
 * Stub function to account for the differences in the ipc_perm structure,
 * while maintaining binary backward compatibility.
 */
int
msgctl(int msqid, int cmd, struct msqid_ds *ds)
{
#ifdef __DARWIN_UNIX03
	return syscall(SYS_msgctl, msqid, cmd, ds);
#else	/* !__DARWIN_UNIX03 */
	struct __msqid_ds_old	*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 = syscall(SYS_msgctl, msqid, semnum, 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_new->msg_perm.seq = ds_old->msg_perm._seq;
		ds_new->msg_perm.key = ds_old->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);
#endif	/* !__DARWIN_UNIX03 */
}
Commit	Line	Data
3d9156a7 A	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	#include <sys/syscall.h>
	27
	28	/*
	29	* Stub function to account for the differences in the ipc_perm structure,
	30	* while maintaining binary backward compatibility.
	31	*/
	32	int
	33	msgctl(int msqid, int cmd, struct msqid_ds *ds)
	34	{
	35	#ifdef __DARWIN_UNIX03
	36	return syscall(SYS_msgctl, msqid, cmd, ds);
	37	#else /* !__DARWIN_UNIX03 */
	38	struct __msqid_ds_old *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 = syscall(SYS_msgctl, msqid, semnum, 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_new->msg_perm.seq = ds_old->msg_perm._seq;
84	ds_new->msg_perm.key = ds_old->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	#endif /* !__DARWIN_UNIX03 */
106	}