1 /* $FreeBSD: src/sys/kern/sysv_ipc.c,v 1.13.2.2 2000/07/01 14:33:49 bsd Exp $ */ 2 /* $NetBSD: sysv_ipc.c,v 1.7 1994/06/29 06:33:11 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Herb Peyerl. 19 * 4. The name of Herb Peyerl may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include "opt_sysvipc.h" 35 36 #include <sys/param.h> 37 #include <sys/ipc.h> 38 #include <sys/proc.h> 39 #include <sys/ucred.h> 40 41 #if defined(SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG) 42 43 /* 44 * Check for ipc permission 45 */ 46 47 int 48 ipcperm(p, perm, mode) 49 struct proc *p; 50 struct ipc_perm *perm; 51 int mode; 52 { 53 struct ucred *cred = p->p_ucred; 54 55 /* Check for user match. */ 56 if (cred->cr_uid != perm->cuid && cred->cr_uid != perm->uid) { 57 if (mode & IPC_M) 58 return (suser(p) == 0 ? 0 : EPERM); 59 /* Check for group match. */ 60 mode >>= 3; 61 if (!groupmember(perm->gid, cred) && 62 !groupmember(perm->cgid, cred)) 63 /* Check for `other' match. */ 64 mode >>= 3; 65 } 66 67 if (mode & IPC_M) 68 return (0); 69 return ((mode & perm->mode) == mode || suser(p) == 0 ? 0 : EACCES); 70 } 71 72 #endif /* defined(SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG) */ 73 74 75 #if !defined(SYSVSEM) || !defined(SYSVSHM) || !defined(SYSVMSG) 76 77 #include <sys/proc.h> 78 #include <sys/sem.h> 79 #include <sys/shm.h> 80 #include <sys/syslog.h> 81 #include <sys/sysproto.h> 82 #include <sys/systm.h> 83 84 static void sysv_nosys __P((struct proc *p, char *s)); 85 86 static void 87 sysv_nosys(p, s) 88 struct proc *p; 89 char *s; 90 { 91 log(LOG_ERR, "cmd %s pid %d tried to use non-present %s\n", 92 p->p_comm, p->p_pid, s); 93 } 94 95 #if !defined(SYSVSEM) 96 97 /* 98 * SYSVSEM stubs 99 */ 100 101 int 102 semsys(p, uap) 103 struct proc *p; 104 struct semsys_args *uap; 105 { 106 sysv_nosys(p, "SYSVSEM"); 107 return nosys(p, (struct nosys_args *)uap); 108 }; 109 110 int 111 __semctl(p, uap) 112 struct proc *p; 113 register struct __semctl_args *uap; 114 { 115 sysv_nosys(p, "SYSVSEM"); 116 return nosys(p, (struct nosys_args *)uap); 117 }; 118 119 int 120 semget(p, uap) 121 struct proc *p; 122 register struct semget_args *uap; 123 { 124 sysv_nosys(p, "SYSVSEM"); 125 return nosys(p, (struct nosys_args *)uap); 126 }; 127 128 int 129 semop(p, uap) 130 struct proc *p; 131 register struct semop_args *uap; 132 { 133 sysv_nosys(p, "SYSVSEM"); 134 return nosys(p, (struct nosys_args *)uap); 135 }; 136 137 /* called from kern_exit.c */ 138 void 139 semexit(p) 140 struct proc *p; 141 { 142 return; 143 } 144 145 #endif /* !defined(SYSVSEM) */ 146 147 148 #if !defined(SYSVMSG) 149 150 /* 151 * SYSVMSG stubs 152 */ 153 154 int 155 msgsys(p, uap) 156 struct proc *p; 157 /* XXX actually varargs. */ 158 struct msgsys_args *uap; 159 { 160 sysv_nosys(p, "SYSVMSG"); 161 return nosys(p, (struct nosys_args *)uap); 162 }; 163 164 int 165 msgctl(p, uap) 166 struct proc *p; 167 register struct msgctl_args *uap; 168 { 169 sysv_nosys(p, "SYSVMSG"); 170 return nosys(p, (struct nosys_args *)uap); 171 }; 172 173 int 174 msgget(p, uap) 175 struct proc *p; 176 register struct msgget_args *uap; 177 { 178 sysv_nosys(p, "SYSVMSG"); 179 return nosys(p, (struct nosys_args *)uap); 180 }; 181 182 int 183 msgsnd(p, uap) 184 struct proc *p; 185 register struct msgsnd_args *uap; 186 { 187 sysv_nosys(p, "SYSVMSG"); 188 return nosys(p, (struct nosys_args *)uap); 189 }; 190 191 int 192 msgrcv(p, uap) 193 struct proc *p; 194 register struct msgrcv_args *uap; 195 { 196 sysv_nosys(p, "SYSVMSG"); 197 return nosys(p, (struct nosys_args *)uap); 198 }; 199 200 #endif /* !defined(SYSVMSG) */ 201 202 203 #if !defined(SYSVSHM) 204 205 /* 206 * SYSVSHM stubs 207 */ 208 209 int 210 shmdt(p, uap) 211 struct proc *p; 212 struct shmdt_args *uap; 213 { 214 sysv_nosys(p, "SYSVSHM"); 215 return nosys(p, (struct nosys_args *)uap); 216 }; 217 218 int 219 shmat(p, uap) 220 struct proc *p; 221 struct shmat_args *uap; 222 { 223 sysv_nosys(p, "SYSVSHM"); 224 return nosys(p, (struct nosys_args *)uap); 225 }; 226 227 int 228 shmctl(p, uap) 229 struct proc *p; 230 struct shmctl_args *uap; 231 { 232 sysv_nosys(p, "SYSVSHM"); 233 return nosys(p, (struct nosys_args *)uap); 234 }; 235 236 int 237 shmget(p, uap) 238 struct proc *p; 239 struct shmget_args *uap; 240 { 241 sysv_nosys(p, "SYSVSHM"); 242 return nosys(p, (struct nosys_args *)uap); 243 }; 244 245 int 246 shmsys(p, uap) 247 struct proc *p; 248 /* XXX actually varargs. */ 249 struct shmsys_args *uap; 250 { 251 sysv_nosys(p, "SYSVSHM"); 252 return nosys(p, (struct nosys_args *)uap); 253 }; 254 255 /* called from kern_fork.c */ 256 void 257 shmfork(p1, p2) 258 struct proc *p1, *p2; 259 { 260 return; 261 } 262 263 /* called from kern_exit.c */ 264 void 265 shmexit(p) 266 struct proc *p; 267 { 268 return; 269 } 270 271 #endif /* !defined(SYSVSHM) */ 272 273 #endif /* !defined(SYSVSEM) || !defined(SYSVSHM) || !defined(SYSVMSG) */ 274