bsd/kern/sysv_ipc.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*      $NetBSD: sysv_ipc.c,v 1.7 1994/06/29 06:33:11 cgd Exp $ */
  23
  24 /*
  25  * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca>
  26  * All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by Herb Peyerl.
  39  * 4. The name of Herb Peyerl may not be used to endorse or promote products
  40  *    derived from this software without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  43  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  44  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  45  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  46  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  47  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  48  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  49  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  50  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  51  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  52  */
  53
  54
  55 #include <sys/param.h>
  56 #include <sys/ipc.h>
  57 #include <sys/ucred.h>
  58
  59
  60 /*
  61  * Check for ipc permission
  62  *
  63  * XXX: Should pass proc argument so that we can pass
  64  * XXX: proc->p_acflag to suser()
  65  */
  66
  67 int
  68 ipcperm(cred, perm, mode)
  69         struct ucred *cred;
  70         struct ipc_perm *perm;
  71         int mode;
  72 {
  73
  74         if (!suser(cred, (u_short *)NULL))
  75                 return (0);
  76
  77         /* Check for user match. */
  78         if (cred->cr_uid != perm->cuid && cred->cr_uid != perm->uid) {
  79                 if (mode & IPC_M)
  80                         return (EPERM);
  81                 /* Check for group match. */
  82                 mode >>= 3;
  83                 if (!groupmember(perm->gid, cred) &&
  84                     !groupmember(perm->cgid, cred))
  85                         /* Check for `other' match. */
  86                         mode >>= 3;
  87         }
  88
  89         if (mode & IPC_M)
  90                 return (0);
  91         return ((mode & perm->mode) == mode ? 0 : EACCES);
  92 }
  93
  94
  95
  96 /*
  97  * SYSVMSG stubs
  98  */
  99
 100 int
 101 msgsys(p, uap)
 102         struct proc *p;
 103         /* XXX actually varargs. */
 104 #if 0
 105         struct msgsys_args *uap;
 106 #else
 107         void *uap;
 108 #endif
 109 {
 110         return(EOPNOTSUPP);
 111 };
 112
 113 int
 114 msgctl(p, uap)
 115         struct proc *p;
 116 #if 0
 117         register struct msgctl_args *uap;
 118 #else
 119         void *uap;
 120 #endif
 121 {
 122         return(EOPNOTSUPP);
 123 };
 124
 125 int
 126 msgget(p, uap)
 127         struct proc *p;
 128 #if 0
 129         register struct msgget_args *uap;
 130 #else
 131         void *uap;
 132 #endif
 133 {
 134         return(EOPNOTSUPP);
 135 };
 136
 137 int
 138 msgsnd(p, uap)
 139         struct proc *p;
 140 #if 0
 141         register struct msgsnd_args *uap;
 142 #else
 143         void *uap;
 144 #endif
 145 {
 146         return(EOPNOTSUPP);
 147 };
 148
 149 int
 150 msgrcv(p, uap)
 151         struct proc *p;
 152 #if 0
 153         register struct msgrcv_args *uap;
 154 #else
 155         void *uap;
 156 #endif
 157 {
 158         return(EOPNOTSUPP);
 159 };