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Annotation of XNU/bsd/kern/sysv_ipc.c, revision 1.1

1.1     ! root        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 <[email protected]>
        !            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: /*
        !            98:  * SYSVSEM stubs
        !            99:  */
        !           100: 
        !           101: int
        !           102: semsys(p, uap)
        !           103:        struct proc *p;
        !           104: #if 0
        !           105:        struct semsys_args *uap;
        !           106: #else
        !           107:        void *uap;
        !           108: #endif
        !           109: {
        !           110:        return(EOPNOTSUPP);
        !           111: };
        !           112: 
        !           113: int
        !           114: semconfig(p, uap)
        !           115:        struct proc *p;
        !           116: #if 0
        !           117:        struct semconfig_args *uap;
        !           118: #else
        !           119:        void *uap;
        !           120: #endif
        !           121: {
        !           122:        return(EOPNOTSUPP);
        !           123: };
        !           124: 
        !           125: int
        !           126: semctl(p, uap)
        !           127:        struct proc *p;
        !           128: #if 0
        !           129:        register struct semctl_args *uap;
        !           130: #else
        !           131:        void *uap;
        !           132: #endif
        !           133: {
        !           134:        return(EOPNOTSUPP);
        !           135: };
        !           136: 
        !           137: int
        !           138: semget(p, uap)
        !           139:        struct proc *p;
        !           140: #if 0
        !           141:        register struct semget_args *uap;
        !           142: #else
        !           143:        void *uap;
        !           144: #endif
        !           145: {
        !           146:        return(EOPNOTSUPP);
        !           147: };
        !           148: 
        !           149: int
        !           150: semop(p, uap)
        !           151:        struct proc *p;
        !           152: #if 0
        !           153:        register struct semop_args *uap;
        !           154: #else
        !           155:        void *uap;
        !           156: #endif
        !           157: {
        !           158:        return(EOPNOTSUPP);
        !           159: };
        !           160: 
        !           161: /* called from kern_exit.c */
        !           162: void
        !           163: semexit(p)
        !           164:        struct proc *p;
        !           165: {
        !           166:        return;
        !           167: }
        !           168: 
        !           169: 
        !           170: 
        !           171: 
        !           172: /*
        !           173:  * SYSVMSG stubs
        !           174:  */
        !           175: 
        !           176: int
        !           177: msgsys(p, uap)
        !           178:        struct proc *p;
        !           179:        /* XXX actually varargs. */
        !           180: #if 0
        !           181:        struct msgsys_args *uap;
        !           182: #else
        !           183:        void *uap;
        !           184: #endif
        !           185: {
        !           186:        return(EOPNOTSUPP);
        !           187: };
        !           188: 
        !           189: int
        !           190: msgctl(p, uap)
        !           191:        struct proc *p;
        !           192: #if 0
        !           193:        register struct msgctl_args *uap;
        !           194: #else
        !           195:        void *uap;
        !           196: #endif
        !           197: {
        !           198:        return(EOPNOTSUPP);
        !           199: };
        !           200: 
        !           201: int
        !           202: msgget(p, uap)
        !           203:        struct proc *p;
        !           204: #if 0
        !           205:        register struct msgget_args *uap;
        !           206: #else
        !           207:        void *uap;
        !           208: #endif
        !           209: {
        !           210:        return(EOPNOTSUPP);
        !           211: };
        !           212: 
        !           213: int
        !           214: msgsnd(p, uap)
        !           215:        struct proc *p;
        !           216: #if 0
        !           217:        register struct msgsnd_args *uap;
        !           218: #else
        !           219:        void *uap;
        !           220: #endif
        !           221: {
        !           222:        return(EOPNOTSUPP);
        !           223: };
        !           224: 
        !           225: int
        !           226: msgrcv(p, uap)
        !           227:        struct proc *p;
        !           228: #if 0
        !           229:        register struct msgrcv_args *uap;
        !           230: #else
        !           231:        void *uap;
        !           232: #endif
        !           233: {
        !           234:        return(EOPNOTSUPP);
        !           235: };

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