| 1 | /* $NetBSD: sysv_ipc.c,v 1.32 2015/12/05 00:51:42 pgoyette Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1998, 2007 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Charles M. Hannum. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <sys/cdefs.h> |
| 33 | __KERNEL_RCSID(0, "$NetBSD: sysv_ipc.c,v 1.32 2015/12/05 00:51:42 pgoyette Exp $" ); |
| 34 | |
| 35 | #ifdef _KERNEL_OPT |
| 36 | #include "opt_sysv.h" |
| 37 | #include "opt_compat_netbsd.h" |
| 38 | #endif |
| 39 | |
| 40 | #include <sys/syscall.h> |
| 41 | #include <sys/syscallargs.h> |
| 42 | #include <sys/syscallvar.h> |
| 43 | #include <sys/param.h> |
| 44 | #include <sys/kernel.h> |
| 45 | #include <sys/proc.h> |
| 46 | #include <sys/ipc.h> |
| 47 | #ifdef SYSVMSG |
| 48 | #include <sys/msg.h> |
| 49 | #endif |
| 50 | #ifdef SYSVSEM |
| 51 | #include <sys/sem.h> |
| 52 | #endif |
| 53 | #ifdef SYSVSHM |
| 54 | #include <sys/shm.h> |
| 55 | #endif |
| 56 | #include <sys/systm.h> |
| 57 | #include <sys/kmem.h> |
| 58 | #include <sys/module.h> |
| 59 | #include <sys/mount.h> |
| 60 | #include <sys/vnode.h> |
| 61 | #include <sys/stat.h> |
| 62 | #include <sys/sysctl.h> |
| 63 | #include <sys/kauth.h> |
| 64 | |
| 65 | /* |
| 66 | * Values in support of System V compatible shared memory. XXX |
| 67 | * (originally located in sys/conf/param.c) |
| 68 | */ |
| 69 | #ifdef SYSVSHM |
| 70 | #if !defined(SHMMAX) && defined(SHMMAXPGS) |
| 71 | #define SHMMAX SHMMAXPGS /* shminit() performs a `*= PAGE_SIZE' */ |
| 72 | #elif !defined(SHMMAX) |
| 73 | #define SHMMAX 0 |
| 74 | #endif |
| 75 | #ifndef SHMMIN |
| 76 | #define SHMMIN 1 |
| 77 | #endif |
| 78 | #ifndef SHMMNI |
| 79 | #define SHMMNI 128 /* <64k, see IPCID_TO_IX in ipc.h */ |
| 80 | #endif |
| 81 | #ifndef SHMSEG |
| 82 | #define SHMSEG 128 |
| 83 | #endif |
| 84 | |
| 85 | struct shminfo shminfo = { |
| 86 | SHMMAX, |
| 87 | SHMMIN, |
| 88 | SHMMNI, |
| 89 | SHMSEG, |
| 90 | 0 |
| 91 | }; |
| 92 | #endif |
| 93 | |
| 94 | /* |
| 95 | * Values in support of System V compatible semaphores. |
| 96 | */ |
| 97 | #ifdef SYSVSEM |
| 98 | struct seminfo seminfo = { |
| 99 | SEMMAP, /* # of entries in semaphore map */ |
| 100 | SEMMNI, /* # of semaphore identifiers */ |
| 101 | SEMMNS, /* # of semaphores in system */ |
| 102 | SEMMNU, /* # of undo structures in system */ |
| 103 | SEMMSL, /* max # of semaphores per id */ |
| 104 | SEMOPM, /* max # of operations per semop call */ |
| 105 | SEMUME, /* max # of undo entries per process */ |
| 106 | SEMUSZ, /* size in bytes of undo structure */ |
| 107 | SEMVMX, /* semaphore maximum value */ |
| 108 | SEMAEM /* adjust on exit max value */ |
| 109 | }; |
| 110 | #endif |
| 111 | |
| 112 | /* |
| 113 | * Values in support of System V compatible messages. |
| 114 | */ |
| 115 | #ifdef SYSVMSG |
| 116 | struct msginfo msginfo = { |
| 117 | MSGMAX, /* max chars in a message */ |
| 118 | MSGMNI, /* # of message queue identifiers */ |
| 119 | MSGMNB, /* max chars in a queue */ |
| 120 | MSGTQL, /* max messages in system */ |
| 121 | MSGSSZ, /* size of a message segment */ |
| 122 | /* (must be small power of 2 greater than 4) */ |
| 123 | MSGSEG /* number of message segments */ |
| 124 | }; |
| 125 | #endif |
| 126 | |
| 127 | #if defined(COMPAT_50) |
| 128 | int sysctl_kern_sysvipc50(SYSCTLFN_PROTO); |
| 129 | #endif |
| 130 | |
| 131 | MODULE(MODULE_CLASS_EXEC, sysv_ipc, NULL); |
| 132 | |
| 133 | SYSCTL_SETUP_PROTO(sysctl_ipc_setup); |
| 134 | |
| 135 | static struct sysctllog *sysctl_sysvipc_clog = NULL; |
| 136 | |
| 137 | static const struct syscall_package sysvipc_syscalls[] = { |
| 138 | #if defined(SYSVSHM) |
| 139 | { SYS___shmctl50, 0, (sy_call_t *)sys___shmctl50 }, |
| 140 | { SYS_shmat, 0, (sy_call_t *)sys_shmat }, |
| 141 | { SYS_shmdt, 0, (sy_call_t *)sys_shmdt }, |
| 142 | { SYS_shmget, 0, (sy_call_t *)sys_shmget }, |
| 143 | #if defined(COMPAT_10) && !defined(_LP64) |
| 144 | { SYS_compat_10_oshmsys, 0, (sy_call_t *)compat_10_sys_shmsys }, |
| 145 | #endif |
| 146 | #if defined(COMPAT_14) |
| 147 | { SYS_compat_14_shmctl, 0, (sy_call_t *)compat_14_sys_shmctl }, |
| 148 | #endif |
| 149 | #if defined(COMPAT_50) |
| 150 | { SYS_compat_50___shmctl13, 0, (sy_call_t *)compat_50_sys___shmctl13 }, |
| 151 | #endif |
| 152 | #endif /* SYSVSHM */ |
| 153 | |
| 154 | #if defined(SYSVSEM) |
| 155 | { SYS_____semctl50, 0, (sy_call_t *)sys_____semctl50 }, |
| 156 | { SYS_semget, 0, (sy_call_t *)sys_semget }, |
| 157 | { SYS_semop, 0, (sy_call_t *)sys_semop }, |
| 158 | { SYS_semconfig, 0, (sy_call_t *)sys_semconfig }, |
| 159 | #if defined(COMPAT_10) && !defined(_LP64) |
| 160 | { SYS_compat_10_osemsys, 0, (sy_call_t *)compat_10_sys_semsys }, |
| 161 | #endif |
| 162 | #if defined(COMPAT_14) |
| 163 | { SYS_compat_14___semctl, 0, (sy_call_t *)compat_14_sys___semctl }, |
| 164 | #endif |
| 165 | #if defined(COMPAT_50) |
| 166 | { SYS_compat_50_____semctl13, 0, (sy_call_t *)compat_50_sys_____semctl13 }, |
| 167 | #endif |
| 168 | #endif /* SYSVSEM */ |
| 169 | |
| 170 | #if defined(SYSVMSG) |
| 171 | { SYS___msgctl50, 0, (sy_call_t *)sys___msgctl50 }, |
| 172 | { SYS_msgget, 0, (sy_call_t *)sys_msgget }, |
| 173 | { SYS_msgsnd, 0, (sy_call_t *)sys_msgsnd }, |
| 174 | { SYS_msgrcv, 0, (sy_call_t *)sys_msgrcv }, |
| 175 | #if defined(COMPAT_10) && !defined(_LP64) |
| 176 | { SYS_compat_10_omsgsys, 0, (sy_call_t *)compat_10_sys_msgsys }, |
| 177 | #endif |
| 178 | #if defined(COMPAT_14) |
| 179 | { SYS_compat_14_msgctl, 0, (sy_call_t *)compat_14_sys_msgctl }, |
| 180 | #endif |
| 181 | #if defined(COMPAT_50) |
| 182 | { SYS_compat_50___msgctl13, 0, (sy_call_t *)compat_50_sys___msgctl13 }, |
| 183 | #endif |
| 184 | #endif /* SYSVMSG */ |
| 185 | { 0, 0, NULL } |
| 186 | }; |
| 187 | |
| 188 | static int |
| 189 | sysv_ipc_modcmd(modcmd_t cmd, void *arg) |
| 190 | { |
| 191 | int error = 0; |
| 192 | |
| 193 | switch (cmd) { |
| 194 | case MODULE_CMD_INIT: |
| 195 | /* Set up the kauth listener */ |
| 196 | sysvipcinit(); |
| 197 | |
| 198 | #ifdef _MODULE |
| 199 | /* Set up the common sysctl tree */ |
| 200 | sysctl_ipc_setup(&sysctl_sysvipc_clog); |
| 201 | #endif |
| 202 | |
| 203 | /* Link the system calls */ |
| 204 | error = syscall_establish(NULL, sysvipc_syscalls); |
| 205 | if (error) |
| 206 | sysvipcfini(); |
| 207 | |
| 208 | /* |
| 209 | * Initialize each sub-component, including their |
| 210 | * sysctl data |
| 211 | */ |
| 212 | #ifdef SYSVSHM |
| 213 | shminit(&sysctl_sysvipc_clog); |
| 214 | #endif |
| 215 | #ifdef SYSVSEM |
| 216 | seminit(&sysctl_sysvipc_clog); |
| 217 | #endif |
| 218 | #ifdef SYSVMSG |
| 219 | msginit(&sysctl_sysvipc_clog); |
| 220 | #endif |
| 221 | break; |
| 222 | case MODULE_CMD_FINI: |
| 223 | /* |
| 224 | * Make sure no subcomponents are active. Each one |
| 225 | * tells us if it is busy, and if it was _not_ busy, |
| 226 | * we assume it has already done its own clean-up. |
| 227 | * So we might need to re-init any components that |
| 228 | * are successfully fini'd if we find one that is |
| 229 | * still busy. |
| 230 | */ |
| 231 | #ifdef SYSVSHM |
| 232 | if (shmfini()) { |
| 233 | return EBUSY; |
| 234 | } |
| 235 | #endif |
| 236 | #ifdef SYSVSEM |
| 237 | if (semfini()) { |
| 238 | #ifdef SYSVSHM |
| 239 | shminit(NULL); |
| 240 | #endif |
| 241 | return EBUSY; |
| 242 | } |
| 243 | #endif |
| 244 | #ifdef SYSVMSG |
| 245 | if (msgfini()) { |
| 246 | #ifdef SYSVSEM |
| 247 | seminit(NULL); |
| 248 | #endif |
| 249 | #ifdef SYSVSHM |
| 250 | shminit(NULL); |
| 251 | #endif |
| 252 | return EBUSY; |
| 253 | } |
| 254 | #endif |
| 255 | |
| 256 | /* Unlink the system calls. */ |
| 257 | error = syscall_disestablish(NULL, sysvipc_syscalls); |
| 258 | if (error) |
| 259 | return error; |
| 260 | |
| 261 | #ifdef _MODULE |
| 262 | /* Remove the sysctl sub-trees */ |
| 263 | sysctl_teardown(&sysctl_sysvipc_clog); |
| 264 | #endif |
| 265 | |
| 266 | /* Remove the kauth listener */ |
| 267 | sysvipcfini(); |
| 268 | break; |
| 269 | default: |
| 270 | return ENOTTY; |
| 271 | } |
| 272 | return error; |
| 273 | } |
| 274 | |
| 275 | static kauth_listener_t sysvipc_listener = NULL; |
| 276 | |
| 277 | static int |
| 278 | sysvipc_listener_cb(kauth_cred_t cred, kauth_action_t action, void *cookie, |
| 279 | void *arg0, void *arg1, void *arg2, void *arg3) |
| 280 | { |
| 281 | mode_t mask; |
| 282 | int ismember = 0; |
| 283 | struct ipc_perm *perm; |
| 284 | int mode; |
| 285 | enum kauth_system_req req; |
| 286 | |
| 287 | req = (enum kauth_system_req)arg0; |
| 288 | |
| 289 | if (!(action == KAUTH_SYSTEM_SYSVIPC && |
| 290 | req == KAUTH_REQ_SYSTEM_SYSVIPC_BYPASS)) |
| 291 | return KAUTH_RESULT_DEFER; |
| 292 | |
| 293 | perm = arg1; |
| 294 | mode = (int)(uintptr_t)arg2; |
| 295 | |
| 296 | if (mode == IPC_M) { |
| 297 | if (kauth_cred_geteuid(cred) == perm->uid || |
| 298 | kauth_cred_geteuid(cred) == perm->cuid) |
| 299 | return (KAUTH_RESULT_ALLOW); |
| 300 | return (KAUTH_RESULT_DEFER); /* EPERM */ |
| 301 | } |
| 302 | |
| 303 | mask = 0; |
| 304 | |
| 305 | if (kauth_cred_geteuid(cred) == perm->uid || |
| 306 | kauth_cred_geteuid(cred) == perm->cuid) { |
| 307 | if (mode & IPC_R) |
| 308 | mask |= S_IRUSR; |
| 309 | if (mode & IPC_W) |
| 310 | mask |= S_IWUSR; |
| 311 | return ((perm->mode & mask) == mask ? KAUTH_RESULT_ALLOW : KAUTH_RESULT_DEFER /* EACCES */); |
| 312 | } |
| 313 | |
| 314 | if (kauth_cred_getegid(cred) == perm->gid || |
| 315 | (kauth_cred_ismember_gid(cred, perm->gid, &ismember) == 0 && ismember) || |
| 316 | kauth_cred_getegid(cred) == perm->cgid || |
| 317 | (kauth_cred_ismember_gid(cred, perm->cgid, &ismember) == 0 && ismember)) { |
| 318 | if (mode & IPC_R) |
| 319 | mask |= S_IRGRP; |
| 320 | if (mode & IPC_W) |
| 321 | mask |= S_IWGRP; |
| 322 | return ((perm->mode & mask) == mask ? KAUTH_RESULT_ALLOW : KAUTH_RESULT_DEFER /* EACCES */); |
| 323 | } |
| 324 | |
| 325 | if (mode & IPC_R) |
| 326 | mask |= S_IROTH; |
| 327 | if (mode & IPC_W) |
| 328 | mask |= S_IWOTH; |
| 329 | return ((perm->mode & mask) == mask ? KAUTH_RESULT_ALLOW : KAUTH_RESULT_DEFER /* EACCES */); |
| 330 | } |
| 331 | |
| 332 | /* |
| 333 | * Check for ipc permission |
| 334 | */ |
| 335 | |
| 336 | int |
| 337 | ipcperm(kauth_cred_t cred, struct ipc_perm *perm, int mode) |
| 338 | { |
| 339 | int error; |
| 340 | |
| 341 | error = kauth_authorize_system(cred, KAUTH_SYSTEM_SYSVIPC, |
| 342 | KAUTH_REQ_SYSTEM_SYSVIPC_BYPASS, perm, KAUTH_ARG(mode), NULL); |
| 343 | if (error == 0) |
| 344 | return (0); |
| 345 | |
| 346 | /* Adjust EPERM and EACCES errors until there's a better way to do this. */ |
| 347 | if (mode != IPC_M) |
| 348 | error = EACCES; |
| 349 | |
| 350 | return error; |
| 351 | } |
| 352 | |
| 353 | void |
| 354 | sysvipcfini(void) |
| 355 | { |
| 356 | |
| 357 | KASSERT(sysvipc_listener != NULL); |
| 358 | kauth_unlisten_scope(sysvipc_listener); |
| 359 | sysvipc_listener = NULL; |
| 360 | } |
| 361 | |
| 362 | void |
| 363 | sysvipcinit(void) |
| 364 | { |
| 365 | |
| 366 | KASSERT(sysvipc_listener == NULL); |
| 367 | |
| 368 | sysvipc_listener = kauth_listen_scope(KAUTH_SCOPE_SYSTEM, |
| 369 | sysvipc_listener_cb, NULL); |
| 370 | } |
| 371 | |
| 372 | static int |
| 373 | sysctl_kern_sysvipc(SYSCTLFN_ARGS) |
| 374 | { |
| 375 | void *where = oldp; |
| 376 | size_t sz, *sizep = oldlenp; |
| 377 | #ifdef SYSVMSG |
| 378 | struct msg_sysctl_info *msgsi = NULL; |
| 379 | #endif |
| 380 | #ifdef SYSVSEM |
| 381 | struct sem_sysctl_info *semsi = NULL; |
| 382 | #endif |
| 383 | #ifdef SYSVSHM |
| 384 | struct shm_sysctl_info *shmsi = NULL; |
| 385 | #endif |
| 386 | size_t infosize, dssize, tsize, buflen; |
| 387 | void *bf = NULL; |
| 388 | char *start; |
| 389 | int32_t nds; |
| 390 | int i, error, ret; |
| 391 | |
| 392 | /* |
| 393 | * If present, call the compat sysctl() code. If it handles the request |
| 394 | * completely (either success or error), return. Otherwise fallthrough |
| 395 | * to the non-compat sysctl code. |
| 396 | */ |
| 397 | |
| 398 | #if defined(COMPAT_50) |
| 399 | error = sysctl_kern_sysvipc50(SYSCTLFN_CALL(rnode)); |
| 400 | if (error != EPASSTHROUGH) |
| 401 | return error; |
| 402 | #endif |
| 403 | |
| 404 | if (namelen != 1) |
| 405 | return EINVAL; |
| 406 | |
| 407 | start = where; |
| 408 | buflen = *sizep; |
| 409 | |
| 410 | switch (*name) { |
| 411 | case KERN_SYSVIPC_MSG_INFO: |
| 412 | #ifdef SYSVMSG |
| 413 | infosize = sizeof(msgsi->msginfo); |
| 414 | nds = msginfo.msgmni; |
| 415 | dssize = sizeof(msgsi->msgids[0]); |
| 416 | break; |
| 417 | #else |
| 418 | return EINVAL; |
| 419 | #endif |
| 420 | case KERN_SYSVIPC_SEM_INFO: |
| 421 | #ifdef SYSVSEM |
| 422 | infosize = sizeof(semsi->seminfo); |
| 423 | nds = seminfo.semmni; |
| 424 | dssize = sizeof(semsi->semids[0]); |
| 425 | break; |
| 426 | #else |
| 427 | return EINVAL; |
| 428 | #endif |
| 429 | case KERN_SYSVIPC_SHM_INFO: |
| 430 | #ifdef SYSVSHM |
| 431 | infosize = sizeof(shmsi->shminfo); |
| 432 | nds = shminfo.shmmni; |
| 433 | dssize = sizeof(shmsi->shmids[0]); |
| 434 | break; |
| 435 | #else |
| 436 | return EINVAL; |
| 437 | #endif |
| 438 | default: |
| 439 | return EINVAL; |
| 440 | } |
| 441 | /* |
| 442 | * Round infosize to 64 bit boundary if requesting more than just |
| 443 | * the info structure or getting the total data size. |
| 444 | */ |
| 445 | if (where == NULL || *sizep > infosize) |
| 446 | infosize = roundup(infosize, sizeof(quad_t)); |
| 447 | tsize = infosize + nds * dssize; |
| 448 | |
| 449 | /* Return just the total size required. */ |
| 450 | if (where == NULL) { |
| 451 | *sizep = tsize; |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | /* Not enough room for even the info struct. */ |
| 456 | if (buflen < infosize) { |
| 457 | *sizep = 0; |
| 458 | return ENOMEM; |
| 459 | } |
| 460 | sz = min(tsize, buflen); |
| 461 | bf = kmem_zalloc(sz, KM_SLEEP); |
| 462 | |
| 463 | switch (*name) { |
| 464 | #ifdef SYSVMSG |
| 465 | case KERN_SYSVIPC_MSG_INFO: |
| 466 | msgsi = (struct msg_sysctl_info *)bf; |
| 467 | msgsi->msginfo = msginfo; |
| 468 | break; |
| 469 | #endif |
| 470 | #ifdef SYSVSEM |
| 471 | case KERN_SYSVIPC_SEM_INFO: |
| 472 | semsi = (struct sem_sysctl_info *)bf; |
| 473 | semsi->seminfo = seminfo; |
| 474 | break; |
| 475 | #endif |
| 476 | #ifdef SYSVSHM |
| 477 | case KERN_SYSVIPC_SHM_INFO: |
| 478 | shmsi = (struct shm_sysctl_info *)bf; |
| 479 | shmsi->shminfo = shminfo; |
| 480 | break; |
| 481 | #endif |
| 482 | } |
| 483 | buflen -= infosize; |
| 484 | |
| 485 | ret = 0; |
| 486 | if (buflen > 0) { |
| 487 | /* Fill in the IPC data structures. */ |
| 488 | for (i = 0; i < nds; i++) { |
| 489 | if (buflen < dssize) { |
| 490 | ret = ENOMEM; |
| 491 | break; |
| 492 | } |
| 493 | switch (*name) { |
| 494 | #ifdef SYSVMSG |
| 495 | case KERN_SYSVIPC_MSG_INFO: |
| 496 | mutex_enter(&msgmutex); |
| 497 | SYSCTL_FILL_MSG(msqs[i].msq_u, msgsi->msgids[i]); |
| 498 | mutex_exit(&msgmutex); |
| 499 | break; |
| 500 | #endif |
| 501 | #ifdef SYSVSEM |
| 502 | case KERN_SYSVIPC_SEM_INFO: |
| 503 | SYSCTL_FILL_SEM(sema[i], semsi->semids[i]); |
| 504 | break; |
| 505 | #endif |
| 506 | #ifdef SYSVSHM |
| 507 | case KERN_SYSVIPC_SHM_INFO: |
| 508 | SYSCTL_FILL_SHM(shmsegs[i], shmsi->shmids[i]); |
| 509 | break; |
| 510 | #endif |
| 511 | } |
| 512 | buflen -= dssize; |
| 513 | } |
| 514 | } |
| 515 | *sizep -= buflen; |
| 516 | error = copyout(bf, start, *sizep); |
| 517 | /* If copyout succeeded, use return code set earlier. */ |
| 518 | if (error == 0) |
| 519 | error = ret; |
| 520 | if (bf) |
| 521 | kmem_free(bf, sz); |
| 522 | return error; |
| 523 | } |
| 524 | |
| 525 | SYSCTL_SETUP(sysctl_ipc_setup, "sysctl kern.ipc subtree setup" ) |
| 526 | { |
| 527 | |
| 528 | sysctl_createv(clog, 0, NULL, NULL, |
| 529 | CTLFLAG_PERMANENT, |
| 530 | CTLTYPE_NODE, "ipc" , |
| 531 | SYSCTL_DESCR("SysV IPC options" ), |
| 532 | NULL, 0, NULL, 0, |
| 533 | CTL_KERN, KERN_SYSVIPC, CTL_EOL); |
| 534 | |
| 535 | sysctl_createv(clog, 0, NULL, NULL, |
| 536 | CTLFLAG_PERMANENT, |
| 537 | CTLTYPE_STRUCT, "sysvipc_info" , |
| 538 | SYSCTL_DESCR("System V style IPC information" ), |
| 539 | sysctl_kern_sysvipc, 0, NULL, 0, |
| 540 | CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_INFO, CTL_EOL); |
| 541 | } |
| 542 | |