bsd/kern/sysv_ipc.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*      $NetBSD: sysv_ipc.c,v 1.7 1994/06/29 06:33:11 cgd Exp $ */
  26
  27 /*
  28  * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca>
  29  * All rights reserved.
  30  *
  31  * Redistribution and use in source and binary forms, with or without
  32  * modification, are permitted provided that the following conditions
  33  * are met:
  34  * 1. Redistributions of source code must retain the above copyright
  35  *    notice, this list of conditions and the following disclaimer.
  36  * 2. Redistributions in binary form must reproduce the above copyright
  37  *    notice, this list of conditions and the following disclaimer in the
  38  *    documentation and/or other materials provided with the distribution.
  39  * 3. All advertising materials mentioning features or use of this software
  40  *    must display the following acknowledgement:
  41  *      This product includes software developed by Herb Peyerl.
  42  * 4. The name of Herb Peyerl may not be used to endorse or promote products
  43  *    derived from this software without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  46  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  47  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  48  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  49  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  50  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  51  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  52  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  53  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  54  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  55  */
  56
  57
  58 #include <sys/param.h>
  59 #include <sys/ipc.h>
  60 #include <sys/ucred.h>
  61
  62
  63 /*
  64  * Check for ipc permission
  65  *
  66  * XXX: Should pass proc argument so that we can pass
  67  * XXX: proc->p_acflag to suser()
  68  */
  69
  70 int
  71 ipcperm(cred, perm, mode)
  72         struct ucred *cred;
  73         struct ipc_perm *perm;
  74         int mode;
  75 {
  76
  77         if (!suser(cred, (u_short *)NULL))
  78                 return (0);
  79
  80         /* Check for user match. */
  81         if (cred->cr_uid != perm->cuid && cred->cr_uid != perm->uid) {
  82                 if (mode & IPC_M)
  83                         return (EPERM);
  84                 /* Check for group match. */
  85                 mode >>= 3;
  86                 if (!groupmember(perm->gid, cred) &&
  87                     !groupmember(perm->cgid, cred))
  88                         /* Check for `other' match. */
  89                         mode >>= 3;
  90         }
  91
  92         if (mode & IPC_M)
  93                 return (0);
  94         return ((mode & perm->mode) == mode ? 0 : EACCES);
  95 }
  96
  97
  98
  99 /*
 100  * SYSVMSG stubs
 101  */
 102
 103 int
 104 msgsys(p, uap)
 105         struct proc *p;
 106         /* XXX actually varargs. */
 107 #if 0
 108         struct msgsys_args *uap;
 109 #else
 110         void *uap;
 111 #endif
 112 {
 113         return(EOPNOTSUPP);
 114 };
 115
 116 int
 117 msgctl(p, uap)
 118         struct proc *p;
 119 #if 0
 120         register struct msgctl_args *uap;
 121 #else
 122         void *uap;
 123 #endif
 124 {
 125         return(EOPNOTSUPP);
 126 };
 127
 128 int
 129 msgget(p, uap)
 130         struct proc *p;
 131 #if 0
 132         register struct msgget_args *uap;
 133 #else
 134         void *uap;
 135 #endif
 136 {
 137         return(EOPNOTSUPP);
 138 };
 139
 140 int
 141 msgsnd(p, uap)
 142         struct proc *p;
 143 #if 0
 144         register struct msgsnd_args *uap;
 145 #else
 146         void *uap;
 147 #endif
 148 {
 149         return(EOPNOTSUPP);
 150 };
 151
 152 int
 153 msgrcv(p, uap)
 154         struct proc *p;
 155 #if 0
 156         register struct msgrcv_args *uap;
 157 #else
 158         void *uap;
 159 #endif
 160 {
 161         return(EOPNOTSUPP);
 162 };