xref: /illumos-gate/usr/src/lib/libc/port/sys/msgsys.c (revision 7a6d80f1660abd4755c68cbd094d4a914681d26e)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 #pragma weak _msgctl = msgctl
31 #pragma weak _msgget = msgget
32 #pragma weak _msgids = msgids
33 #pragma weak _msgsnap = msgsnap
34 
35 #include "lint.h"
36 #include <sys/types.h>
37 #include <sys/ipc.h>
38 #include <sys/ipc_impl.h>
39 #include <sys/msg.h>
40 #include <sys/msg_impl.h>
41 #include <sys/syscall.h>
42 #include <errno.h>
43 #include <limits.h>
44 
45 int
46 msgget(key_t key, int msgflg)
47 {
48 	return (syscall(SYS_msgsys, MSGGET, key, msgflg));
49 }
50 
51 int
52 msgctl(int msqid, int cmd, struct msqid_ds *buf)
53 {
54 	if (cmd == IPC_SET64 || cmd == IPC_STAT64) {
55 		(void) __set_errno(EINVAL);
56 		return (-1);
57 	}
58 
59 	return (syscall(SYS_msgsys, MSGCTL, msqid, cmd, buf));
60 }
61 
62 int
63 msgctl64(int msqid, int cmd, struct msqid_ds64 *buf)
64 {
65 	if (cmd != IPC_SET64 && cmd != IPC_STAT64) {
66 		(void) __set_errno(EINVAL);
67 		return (-1);
68 	}
69 
70 	return (syscall(SYS_msgsys, MSGCTL, msqid, cmd, buf));
71 }
72 
73 ssize_t
74 __msgrcv(int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg)
75 {
76 	if (msgsz > INT_MAX) {
77 		sysret_t rval;
78 		int error;
79 
80 		/*
81 		 * We have to use __systemcall here because in the
82 		 * 64-bit case, we need to return a long, while
83 		 * syscall() is doomed to return an int
84 		 */
85 		error = __systemcall(&rval, SYS_msgsys, MSGRCV, msqid,
86 		    msgp, msgsz, msgtyp, msgflg);
87 		if (error)
88 			(void) __set_errno(error);
89 		return ((ssize_t)rval.sys_rval1);
90 	}
91 	return ((ssize_t)syscall(SYS_msgsys, MSGRCV, msqid,
92 	    msgp, msgsz, msgtyp, msgflg));
93 }
94 
95 int
96 __msgsnd(int msqid, const void *msgp, size_t msgsz, int msgflg)
97 {
98 	if (msgsz > INT_MAX) {
99 		sysret_t rval;
100 		int error;
101 
102 		error = __systemcall(&rval, SYS_msgsys, MSGSND, msqid,
103 		    msgp, msgsz, msgflg);
104 		if (error)
105 			(void) __set_errno(error);
106 		return ((int)rval.sys_rval1);
107 	}
108 	return (syscall(SYS_msgsys, MSGSND, msqid, msgp, msgsz, msgflg));
109 }
110 
111 int
112 msgids(int *buf, uint_t nids, uint_t *pnids)
113 {
114 	return (syscall(SYS_msgsys, MSGIDS, buf, nids, pnids));
115 }
116 
117 int
118 msgsnap(int msqid, void *buf, size_t bufsz, long msgtyp)
119 {
120 	return (syscall(SYS_msgsys, MSGSNAP, msqid, buf, bufsz, msgtyp));
121 }
122