usr/src/lib/libc/port/sys/msgsys.c

   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 ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #pragma weak _msgctl = msgctl
  33 #pragma weak _msgget = msgget
  34 #pragma weak _msgids = msgids
  35 #pragma weak _msgsnap = msgsnap
  36
  37 #include "lint.h"
  38 #include <sys/types.h>
  39 #include <sys/ipc.h>
  40 #include <sys/ipc_impl.h>
  41 #include <sys/msg.h>
  42 #include <sys/msg_impl.h>
  43 #include <sys/syscall.h>
  44 #include <errno.h>
  45 #include <limits.h>
  46
  47 int
  48 msgget(key_t key, int msgflg)
  49 {
  50         return (syscall(SYS_msgsys, MSGGET, key, msgflg));
  51 }
  52
  53 int
  54 msgctl(int msqid, int cmd, struct msqid_ds *buf)
  55 {
  56         if (cmd == IPC_SET64 || cmd == IPC_STAT64) {
  57                 (void) __set_errno(EINVAL);
  58                 return (-1);
  59         }
  60
  61         return (syscall(SYS_msgsys, MSGCTL, msqid, cmd, buf));
  62 }
  63
  64 int
  65 msgctl64(int msqid, int cmd, struct msqid_ds64 *buf)
  66 {
  67         if (cmd != IPC_SET64 && cmd != IPC_STAT64) {
  68                 (void) __set_errno(EINVAL);
  69                 return (-1);
  70         }
  71
  72         return (syscall(SYS_msgsys, MSGCTL, msqid, cmd, buf));
  73 }
  74
  75 ssize_t
  76 __msgrcv(int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg)
  77 {
  78         if (msgsz > INT_MAX) {
  79                 sysret_t rval;
  80                 int error;
  81
  82                 /*
  83                  * We have to use __systemcall here because in the
  84                  * 64-bit case, we need to return a long, while
  85                  * syscall() is doomed to return an int
  86                  */
  87                 error = __systemcall(&rval, SYS_msgsys, MSGRCV, msqid,
  88                     msgp, msgsz, msgtyp, msgflg);
  89                 if (error)
  90                         (void) __set_errno(error);
  91                 return ((ssize_t)rval.sys_rval1);
  92         }
  93         return ((ssize_t)syscall(SYS_msgsys, MSGRCV, msqid,
  94             msgp, msgsz, msgtyp, msgflg));
  95 }
  96
  97 int
  98 __msgsnd(int msqid, const void *msgp, size_t msgsz, int msgflg)
  99 {
 100         if (msgsz > INT_MAX) {
 101                 sysret_t rval;
 102                 int error;
 103
 104                 error = __systemcall(&rval, SYS_msgsys, MSGSND, msqid,
 105                     msgp, msgsz, msgflg);
 106                 if (error)
 107                         (void) __set_errno(error);
 108                 return ((int)rval.sys_rval1);
 109         }
 110         return (syscall(SYS_msgsys, MSGSND, msqid, msgp, msgsz, msgflg));
 111 }
 112
 113 int
 114 msgids(int *buf, uint_t nids, uint_t *pnids)
 115 {
 116         return (syscall(SYS_msgsys, MSGIDS, buf, nids, pnids));
 117 }
 118
 119 int
 120 msgsnap(int msqid, void *buf, size_t bufsz, long msgtyp)
 121 {
 122         return (syscall(SYS_msgsys, MSGSNAP, msqid, buf, bufsz, msgtyp));
 123 }