svr4_ipc.c revision 147817
1/*- 2 * Copyright (c) 1995 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Christos Zoulas. 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 the NetBSD 19 * Foundation, Inc. and its contributors. 20 * 4. Neither the name of The NetBSD Foundation nor the names of its 21 * contributors may be used to endorse or promote products derived 22 * from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36/*- 37 * Portions of this code have been derived from software contributed 38 * to the FreeBSD Project by Mark Newton. 39 * 40 * Copyright (c) 1999 Mark Newton 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. The name of the author may not be used to endorse or promote products 52 * derived from this software without specific prior written permission 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 55 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 56 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 57 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 58 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 59 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 63 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 64 * 65 * XXX- This code is presently a no-op on FreeBSD (and isn't compiled due 66 * to preprocessor conditionals). A nice project for a kernel hacking 67 * novice might be to MakeItGo, but I have more important fish to fry 68 * at present. 69 * 70 * Derived from: $NetBSD: svr4_ipc.c,v 1.7 1998/10/19 22:43:00 tron Exp $ 71 */ 72 73#include <sys/cdefs.h> 74__FBSDID("$FreeBSD: head/sys/compat/svr4/svr4_ipc.c 147817 2005-07-07 19:25:47Z jhb $"); 75 76#include "opt_sysvipc.h" 77 78#include <sys/param.h> 79#include <sys/ipc.h> 80#include <sys/msg.h> 81#include <sys/proc.h> 82#include <sys/sem.h> 83#include <sys/shm.h> 84#include <sys/syscallsubr.h> 85#include <sys/sysproto.h> 86#include <sys/systm.h> 87#include <sys/time.h> 88 89#include <compat/svr4/svr4.h> 90#include <compat/svr4/svr4_types.h> 91#include <compat/svr4/svr4_signal.h> 92#include <compat/svr4/svr4_proto.h> 93#include <compat/svr4/svr4_util.h> 94#include <compat/svr4/svr4_ipc.h> 95 96#if defined(SYSVMSG) || defined(SYSVSHM) || defined(SYSVSEM) 97static void svr4_to_bsd_ipc_perm(const struct svr4_ipc_perm *, 98 struct ipc_perm *); 99static void bsd_to_svr4_ipc_perm(const struct ipc_perm *, 100 struct svr4_ipc_perm *); 101#endif 102 103#ifdef SYSVSEM 104static void bsd_to_svr4_semid_ds(const struct semid_ds *, 105 struct svr4_semid_ds *); 106static void svr4_to_bsd_semid_ds(const struct svr4_semid_ds *, 107 struct semid_ds *); 108static int svr4_setsemun(caddr_t *sgp, union semun **argp, 109 union semun *usp); 110static int svr4_semop(struct thread *, void *); 111static int svr4_semget(struct thread *, void *); 112static int svr4_semctl(struct thread *, void *); 113#endif 114 115#ifdef SYSVMSG 116static void bsd_to_svr4_msqid_ds(const struct msqid_ds *, 117 struct svr4_msqid_ds *); 118static void svr4_to_bsd_msqid_ds(const struct svr4_msqid_ds *, 119 struct msqid_ds *); 120static int svr4_msgsnd(struct thread *, void *); 121static int svr4_msgrcv(struct thread *, void *); 122static int svr4_msgget(struct thread *, void *); 123static int svr4_msgctl(struct thread *, void *); 124#endif 125 126#ifdef SYSVSHM 127static void bsd_to_svr4_shmid_ds(const struct shmid_ds *, 128 struct svr4_shmid_ds *); 129static void svr4_to_bsd_shmid_ds(const struct svr4_shmid_ds *, 130 struct shmid_ds *); 131static int svr4_shmat(struct thread *, void *); 132static int svr4_shmdt(struct thread *, void *); 133static int svr4_shmget(struct thread *, void *); 134static int svr4_shmctl(struct thread *, void *); 135#endif 136 137#if defined(SYSVMSG) || defined(SYSVSHM) || defined(SYSVSEM) 138 139static void 140svr4_to_bsd_ipc_perm(spp, bpp) 141 const struct svr4_ipc_perm *spp; 142 struct ipc_perm *bpp; 143{ 144 bpp->key = spp->key; 145 bpp->uid = spp->uid; 146 bpp->gid = spp->gid; 147 bpp->cuid = spp->cuid; 148 bpp->cgid = spp->cgid; 149 bpp->mode = spp->mode; 150 bpp->seq = spp->seq; 151} 152 153static void 154bsd_to_svr4_ipc_perm(bpp, spp) 155 const struct ipc_perm *bpp; 156 struct svr4_ipc_perm *spp; 157{ 158 spp->key = bpp->key; 159 spp->uid = bpp->uid; 160 spp->gid = bpp->gid; 161 spp->cuid = bpp->cuid; 162 spp->cgid = bpp->cgid; 163 spp->mode = bpp->mode; 164 spp->seq = bpp->seq; 165} 166#endif 167 168#ifdef SYSVSEM 169static void 170bsd_to_svr4_semid_ds(bds, sds) 171 const struct semid_ds *bds; 172 struct svr4_semid_ds *sds; 173{ 174 bsd_to_svr4_ipc_perm(&bds->sem_perm, &sds->sem_perm); 175 sds->sem_base = (struct svr4_sem *) bds->sem_base; 176 sds->sem_nsems = bds->sem_nsems; 177 sds->sem_otime = bds->sem_otime; 178 sds->sem_pad1 = bds->sem_pad1; 179 sds->sem_ctime = bds->sem_ctime; 180 sds->sem_pad2 = bds->sem_pad2; 181} 182 183static void 184svr4_to_bsd_semid_ds(sds, bds) 185 const struct svr4_semid_ds *sds; 186 struct semid_ds *bds; 187{ 188 svr4_to_bsd_ipc_perm(&sds->sem_perm, &bds->sem_perm); 189 bds->sem_base = (struct sem *) bds->sem_base; 190 bds->sem_nsems = sds->sem_nsems; 191 bds->sem_otime = sds->sem_otime; 192 bds->sem_pad1 = sds->sem_pad1; 193 bds->sem_ctime = sds->sem_ctime; 194 bds->sem_pad2 = sds->sem_pad2; 195} 196 197static int 198svr4_setsemun(sgp, argp, usp) 199 caddr_t *sgp; 200 union semun **argp; 201 union semun *usp; 202{ 203 *argp = stackgap_alloc(sgp, sizeof(union semun)); 204 return copyout((caddr_t)usp, *argp, sizeof(union semun)); 205} 206 207struct svr4_sys_semctl_args { 208 int what; 209 int semid; 210 int semnum; 211 int cmd; 212 union semun arg; 213}; 214 215static int 216svr4_semctl(td, v) 217 struct thread *td; 218 void *v; 219{ 220 int error; 221 struct svr4_sys_semctl_args *uap = v; 222 struct __semctl_args ap; 223 struct svr4_semid_ds ss; 224 struct semid_ds bs, *bsp; 225 caddr_t sg = stackgap_init(); 226 227 ap.semid = uap->semid; 228 ap.semnum = uap->semnum; 229 230 switch (uap->cmd) { 231 case SVR4_SEM_GETZCNT: 232 case SVR4_SEM_GETNCNT: 233 case SVR4_SEM_GETPID: 234 case SVR4_SEM_GETVAL: 235 switch (uap->cmd) { 236 case SVR4_SEM_GETZCNT: 237 ap.cmd = GETZCNT; 238 break; 239 case SVR4_SEM_GETNCNT: 240 ap.cmd = GETNCNT; 241 break; 242 case SVR4_SEM_GETPID: 243 ap.cmd = GETPID; 244 break; 245 case SVR4_SEM_GETVAL: 246 ap.cmd = GETVAL; 247 break; 248 } 249 return __semctl(td, &ap); 250 251 case SVR4_SEM_SETVAL: 252 error = svr4_setsemun(&sg, &ap.arg, &uap->arg); 253 if (error) 254 return error; 255 ap.cmd = SETVAL; 256 return __semctl(td, &ap); 257 258 case SVR4_SEM_GETALL: 259 error = svr4_setsemun(&sg, &ap.arg, &uap->arg); 260 if (error) 261 return error; 262 ap.cmd = GETVAL; 263 return __semctl(td, &ap); 264 265 case SVR4_SEM_SETALL: 266 error = svr4_setsemun(&sg, &ap.arg, &uap->arg); 267 if (error) 268 return error; 269 ap.cmd = SETVAL; 270 return __semctl(td, &ap); 271 272 case SVR4_IPC_STAT: 273 ap.cmd = IPC_STAT; 274 bsp = stackgap_alloc(&sg, sizeof(bs)); 275 error = svr4_setsemun(&sg, &ap.arg, 276 (union semun *)&bsp); 277 if (error) 278 return error; 279 if ((error = __semctl(td, &ap)) != 0) 280 return error; 281 error = copyin((caddr_t)bsp, (caddr_t)&bs, sizeof(bs)); 282 if (error) 283 return error; 284 bsd_to_svr4_semid_ds(&bs, &ss); 285 return copyout(&ss, uap->arg.buf, sizeof(ss)); 286 287 case SVR4_IPC_SET: 288 ap.cmd = IPC_SET; 289 bsp = stackgap_alloc(&sg, sizeof(bs)); 290 error = svr4_setsemun(&sg, &ap.arg, 291 (union semun *)&bsp); 292 if (error) 293 return error; 294 error = copyin(uap->arg.buf, (caddr_t) &ss, sizeof ss); 295 if (error) 296 return error; 297 svr4_to_bsd_semid_ds(&ss, &bs); 298 error = copyout(&bs, bsp, sizeof(bs)); 299 if (error) 300 return error; 301 return __semctl(td, &ap); 302 303 case SVR4_IPC_RMID: 304 ap.cmd = IPC_RMID; 305 bsp = stackgap_alloc(&sg, sizeof(bs)); 306 error = svr4_setsemun(&sg, &ap.arg, 307 (union semun *)&bsp); 308 if (error) 309 return error; 310 error = copyin(uap->arg.buf, &ss, sizeof ss); 311 if (error) 312 return error; 313 svr4_to_bsd_semid_ds(&ss, &bs); 314 error = copyout(&bs, bsp, sizeof(bs)); 315 if (error) 316 return error; 317 return __semctl(td, &ap); 318 319 default: 320 return EINVAL; 321 } 322} 323 324struct svr4_sys_semget_args { 325 int what; 326 svr4_key_t key; 327 int nsems; 328 int semflg; 329}; 330 331static int 332svr4_semget(td, v) 333 struct thread *td; 334 void *v; 335{ 336 struct svr4_sys_semget_args *uap = v; 337 struct semget_args ap; 338 339 ap.key = uap->key; 340 ap.nsems = uap->nsems; 341 ap.semflg = uap->semflg; 342 343 return semget(td, &ap); 344} 345 346struct svr4_sys_semop_args { 347 int what; 348 int semid; 349 struct svr4_sembuf * sops; 350 u_int nsops; 351}; 352 353static int 354svr4_semop(td, v) 355 struct thread *td; 356 void *v; 357{ 358 struct svr4_sys_semop_args *uap = v; 359 struct semop_args ap; 360 361 ap.semid = uap->semid; 362 /* These are the same */ 363 ap.sops = (struct sembuf *) uap->sops; 364 ap.nsops = uap->nsops; 365 366 return semop(td, &ap); 367} 368 369int 370svr4_sys_semsys(td, uap) 371 struct thread *td; 372 struct svr4_sys_semsys_args *uap; 373{ 374 375 DPRINTF(("svr4_semsys(%d)\n", uap->what)); 376 377 switch (uap->what) { 378 case SVR4_semctl: 379 return svr4_semctl(td, uap); 380 case SVR4_semget: 381 return svr4_semget(td, uap); 382 case SVR4_semop: 383 return svr4_semop(td, uap); 384 default: 385 return EINVAL; 386 } 387} 388#endif 389 390#ifdef SYSVMSG 391static void 392bsd_to_svr4_msqid_ds(bds, sds) 393 const struct msqid_ds *bds; 394 struct svr4_msqid_ds *sds; 395{ 396 bsd_to_svr4_ipc_perm(&bds->msg_perm, &sds->msg_perm); 397 sds->msg_first = (struct svr4_msg *) bds->msg_first; 398 sds->msg_last = (struct svr4_msg *) bds->msg_last; 399 sds->msg_cbytes = bds->msg_cbytes; 400 sds->msg_qnum = bds->msg_qnum; 401 sds->msg_qbytes = bds->msg_qbytes; 402 sds->msg_lspid = bds->msg_lspid; 403 sds->msg_lrpid = bds->msg_lrpid; 404 sds->msg_stime = bds->msg_stime; 405 sds->msg_pad1 = bds->msg_pad1; 406 sds->msg_rtime = bds->msg_rtime; 407 sds->msg_pad2 = bds->msg_pad2; 408 sds->msg_ctime = bds->msg_ctime; 409 sds->msg_pad3 = bds->msg_pad3; 410 411 /* use the padding for the rest of the fields */ 412 { 413 const short *pad = (const short *) bds->msg_pad4; 414 sds->msg_cv = pad[0]; 415 sds->msg_qnum_cv = pad[1]; 416 } 417} 418 419static void 420svr4_to_bsd_msqid_ds(sds, bds) 421 const struct svr4_msqid_ds *sds; 422 struct msqid_ds *bds; 423{ 424 svr4_to_bsd_ipc_perm(&sds->msg_perm, &bds->msg_perm); 425 bds->msg_first = (struct msg *) sds->msg_first; 426 bds->msg_last = (struct msg *) sds->msg_last; 427 bds->msg_cbytes = sds->msg_cbytes; 428 bds->msg_qnum = sds->msg_qnum; 429 bds->msg_qbytes = sds->msg_qbytes; 430 bds->msg_lspid = sds->msg_lspid; 431 bds->msg_lrpid = sds->msg_lrpid; 432 bds->msg_stime = sds->msg_stime; 433 bds->msg_pad1 = sds->msg_pad1; 434 bds->msg_rtime = sds->msg_rtime; 435 bds->msg_pad2 = sds->msg_pad2; 436 bds->msg_ctime = sds->msg_ctime; 437 bds->msg_pad3 = sds->msg_pad3; 438 439 /* use the padding for the rest of the fields */ 440 { 441 short *pad = (short *) bds->msg_pad4; 442 pad[0] = sds->msg_cv; 443 pad[1] = sds->msg_qnum_cv; 444 } 445} 446 447struct svr4_sys_msgsnd_args { 448 int what; 449 int msqid; 450 void * msgp; 451 size_t msgsz; 452 int msgflg; 453}; 454 455static int 456svr4_msgsnd(td, v) 457 struct thread *td; 458 void *v; 459{ 460 struct svr4_sys_msgsnd_args *uap = v; 461 struct msgsnd_args ap; 462 463 ap.msqid = uap->msqid; 464 ap.msgp = uap->msgp; 465 ap.msgsz = uap->msgsz; 466 ap.msgflg = uap->msgflg; 467 468 return msgsnd(td, &ap); 469} 470 471struct svr4_sys_msgrcv_args { 472 int what; 473 int msqid; 474 void * msgp; 475 size_t msgsz; 476 long msgtyp; 477 int msgflg; 478}; 479 480static int 481svr4_msgrcv(td, v) 482 struct thread *td; 483 void *v; 484{ 485 struct svr4_sys_msgrcv_args *uap = v; 486 struct msgrcv_args ap; 487 488 ap.msqid = uap->msqid; 489 ap.msgp = uap->msgp; 490 ap.msgsz = uap->msgsz; 491 ap.msgtyp = uap->msgtyp; 492 ap.msgflg = uap->msgflg; 493 494 return msgrcv(td, &ap); 495} 496 497struct svr4_sys_msgget_args { 498 int what; 499 svr4_key_t key; 500 int msgflg; 501}; 502 503static int 504svr4_msgget(td, v) 505 struct thread *td; 506 void *v; 507{ 508 struct svr4_sys_msgget_args *uap = v; 509 struct msgget_args ap; 510 511 ap.key = uap->key; 512 ap.msgflg = uap->msgflg; 513 514 return msgget(td, &ap); 515} 516 517struct svr4_sys_msgctl_args { 518 int what; 519 int msqid; 520 int cmd; 521 struct svr4_msqid_ds * buf; 522}; 523 524static int 525svr4_msgctl(td, v) 526 struct thread *td; 527 void *v; 528{ 529 struct svr4_sys_msgctl_args *uap = v; 530 struct svr4_msqid_ds ss; 531 struct msqid_ds bs; 532 int error; 533 534 switch (uap->cmd) { 535 case SVR4_IPC_STAT: 536 error = kern_msgctl(td, uap->msqid, IPC_STAT, &bs); 537 if (error) 538 return error; 539 bsd_to_svr4_msqid_ds(&bs, &ss); 540 return copyout(&ss, uap->buf, sizeof ss); 541 542 case SVR4_IPC_SET: 543 error = copyin(uap->buf, &ss, sizeof ss); 544 if (error) 545 return error; 546 svr4_to_bsd_msqid_ds(&ss, &bs); 547 return (kern_msgctl(td, uap->msqid, IPC_SET, &bs)); 548 549 case SVR4_IPC_RMID: 550 error = copyin(uap->buf, &ss, sizeof ss); 551 if (error) 552 return error; 553 svr4_to_bsd_msqid_ds(&ss, &bs); 554 return (kern_msgctl(td, uap->msqid, IPC_RMID, &bs)); 555 556 default: 557 return EINVAL; 558 } 559} 560 561int 562svr4_sys_msgsys(td, uap) 563 struct thread *td; 564 struct svr4_sys_msgsys_args *uap; 565{ 566 567 DPRINTF(("svr4_msgsys(%d)\n", uap->what)); 568 569 switch (uap->what) { 570 case SVR4_msgsnd: 571 return svr4_msgsnd(td, uap); 572 case SVR4_msgrcv: 573 return svr4_msgrcv(td, uap); 574 case SVR4_msgget: 575 return svr4_msgget(td, uap); 576 case SVR4_msgctl: 577 return svr4_msgctl(td, uap); 578 default: 579 return EINVAL; 580 } 581} 582#endif 583 584#ifdef SYSVSHM 585 586static void 587bsd_to_svr4_shmid_ds(bds, sds) 588 const struct shmid_ds *bds; 589 struct svr4_shmid_ds *sds; 590{ 591 bsd_to_svr4_ipc_perm(&bds->shm_perm, &sds->shm_perm); 592 sds->shm_segsz = bds->shm_segsz; 593 sds->shm_lkcnt = 0; 594 sds->shm_lpid = bds->shm_lpid; 595 sds->shm_cpid = bds->shm_cpid; 596 sds->shm_amp = bds->shm_internal; 597 sds->shm_nattch = bds->shm_nattch; 598 sds->shm_cnattch = 0; 599 sds->shm_atime = bds->shm_atime; 600 sds->shm_pad1 = 0; 601 sds->shm_dtime = bds->shm_dtime; 602 sds->shm_pad2 = 0; 603 sds->shm_ctime = bds->shm_ctime; 604 sds->shm_pad3 = 0; 605} 606 607static void 608svr4_to_bsd_shmid_ds(sds, bds) 609 const struct svr4_shmid_ds *sds; 610 struct shmid_ds *bds; 611{ 612 svr4_to_bsd_ipc_perm(&sds->shm_perm, &bds->shm_perm); 613 bds->shm_segsz = sds->shm_segsz; 614 bds->shm_lpid = sds->shm_lpid; 615 bds->shm_cpid = sds->shm_cpid; 616 bds->shm_internal = sds->shm_amp; 617 bds->shm_nattch = sds->shm_nattch; 618 bds->shm_atime = sds->shm_atime; 619 bds->shm_dtime = sds->shm_dtime; 620 bds->shm_ctime = sds->shm_ctime; 621} 622 623struct svr4_sys_shmat_args { 624 int what; 625 int shmid; 626 void * shmaddr; 627 int shmflg; 628}; 629 630static int 631svr4_shmat(td, v) 632 struct thread *td; 633 void *v; 634{ 635 struct svr4_sys_shmat_args *uap = v; 636 struct shmat_args ap; 637 638 ap.shmid = uap->shmid; 639 ap.shmaddr = uap->shmaddr; 640 ap.shmflg = uap->shmflg; 641 642 return shmat(td, &ap); 643} 644 645struct svr4_sys_shmdt_args { 646 int what; 647 void * shmaddr; 648}; 649 650static int 651svr4_shmdt(td, v) 652 struct thread *td; 653 void *v; 654{ 655 struct svr4_sys_shmdt_args *uap = v; 656 struct shmdt_args ap; 657 658 ap.shmaddr = uap->shmaddr; 659 660 return shmdt(td, &ap); 661} 662 663struct svr4_sys_shmget_args { 664 int what; 665 key_t key; 666 int size; 667 int shmflg; 668}; 669 670static int 671svr4_shmget(td, v) 672 struct thread *td; 673 void *v; 674{ 675 struct svr4_sys_shmget_args *uap = v; 676 struct shmget_args ap; 677 678 ap.key = uap->key; 679 ap.size = uap->size; 680 ap.shmflg = uap->shmflg; 681 682 return shmget(td, &ap); 683} 684 685struct svr4_sys_shmctl_args { 686 int what; 687 int shmid; 688 int cmd; 689 struct svr4_shmid_ds * buf; 690}; 691 692int 693svr4_shmctl(td, v) 694 struct thread *td; 695 void *v; 696{ 697 struct svr4_sys_shmctl_args *uap = v; 698 int error; 699 caddr_t sg = stackgap_init(); 700 struct shmctl_args ap; 701 struct shmid_ds bs; 702 struct svr4_shmid_ds ss; 703 704 ap.shmid = uap->shmid; 705 706 if (uap->buf != NULL) { 707 ap.buf = stackgap_alloc(&sg, sizeof (struct shmid_ds)); 708 switch (uap->cmd) { 709 case SVR4_IPC_SET: 710 case SVR4_IPC_RMID: 711 case SVR4_SHM_LOCK: 712 case SVR4_SHM_UNLOCK: 713 error = copyin(uap->buf, (caddr_t) &ss, 714 sizeof ss); 715 if (error) 716 return error; 717 svr4_to_bsd_shmid_ds(&ss, &bs); 718 error = copyout(&bs, ap.buf, sizeof bs); 719 if (error) 720 return error; 721 break; 722 default: 723 break; 724 } 725 } 726 else 727 ap.buf = NULL; 728 729 730 switch (uap->cmd) { 731 case SVR4_IPC_STAT: 732 ap.cmd = IPC_STAT; 733 if ((error = shmctl(td, &ap)) != 0) 734 return error; 735 if (uap->buf == NULL) 736 return 0; 737 error = copyin(&bs, ap.buf, sizeof bs); 738 if (error) 739 return error; 740 bsd_to_svr4_shmid_ds(&bs, &ss); 741 return copyout(&ss, uap->buf, sizeof ss); 742 743 case SVR4_IPC_SET: 744 ap.cmd = IPC_SET; 745 return shmctl(td, &ap); 746 747 case SVR4_IPC_RMID: 748 case SVR4_SHM_LOCK: 749 case SVR4_SHM_UNLOCK: 750 switch (uap->cmd) { 751 case SVR4_IPC_RMID: 752 ap.cmd = IPC_RMID; 753 break; 754 case SVR4_SHM_LOCK: 755 ap.cmd = SHM_LOCK; 756 break; 757 case SVR4_SHM_UNLOCK: 758 ap.cmd = SHM_UNLOCK; 759 break; 760 default: 761 return EINVAL; 762 } 763 return shmctl(td, &ap); 764 765 default: 766 return EINVAL; 767 } 768} 769 770int 771svr4_sys_shmsys(td, uap) 772 struct thread *td; 773 struct svr4_sys_shmsys_args *uap; 774{ 775 776 DPRINTF(("svr4_shmsys(%d)\n", uap->what)); 777 778 switch (uap->what) { 779 case SVR4_shmat: 780 return svr4_shmat(td, uap); 781 case SVR4_shmdt: 782 return svr4_shmdt(td, uap); 783 case SVR4_shmget: 784 return svr4_shmget(td, uap); 785 case SVR4_shmctl: 786 return svr4_shmctl(td, uap); 787 default: 788 return ENOSYS; 789 } 790} 791#endif /* SYSVSHM */ 792