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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1988 University of Utah. | |
3 | * Copyright (c) 1990 The Regents of the University of California. | |
4 | * All rights reserved. | |
5 | * | |
6 | * This code is derived from software contributed to Berkeley by | |
7 | * the Systems Programming Group of the University of Utah Computer | |
8 | * Science Department. Originally from University of Wisconsin. | |
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 | * 3. All advertising materials mentioning features or use of this software | |
19 | * must display the following acknowledgement: | |
20 | * This product includes software developed by the University of | |
21 | * California, Berkeley and its contributors. | |
22 | * 4. Neither the name of the University nor the names of its contributors | |
23 | * may be used to endorse or promote products derived from this software | |
24 | * without specific prior written permission. | |
25 | * | |
26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
36 | * SUCH DAMAGE. | |
37 | * | |
600f7f07 RG |
38 | * from: Utah $Hdr: uipc_shm.c 1.9 89/08/14$ |
39 | * from: @(#)sysv_shm.c 7.15 (Berkeley) 5/13/91 | |
24fd64ab | 40 | * $Id: sysv_shm.c,v 1.8 1993/12/20 19:31:18 wollman Exp $ |
15637ed4 RG |
41 | */ |
42 | ||
43 | /* | |
44 | * System V shared memory routines. | |
45 | * TEMPORARY, until mmap is in place; | |
46 | * needed now for HP-UX compatibility and X server (yech!). | |
47 | */ | |
48 | ||
49 | #ifdef SYSVSHM | |
50 | ||
51 | #include "param.h" | |
52 | #include "systm.h" | |
53 | #include "kernel.h" | |
54 | #include "proc.h" | |
55 | #include "shm.h" | |
56 | #include "malloc.h" | |
57 | #include "mman.h" | |
58 | #include "vm/vm.h" | |
59 | #include "vm/vm_kern.h" | |
60 | #include "vm/vm_inherit.h" | |
61 | #include "vm/vm_pager.h" | |
fde1aeb2 | 62 | #include "vm/vm_user.h" |
15637ed4 RG |
63 | |
64 | #ifdef HPUXCOMPAT | |
65 | #include "hp300/hpux/hpux.h" | |
66 | #endif | |
67 | ||
bbc3f849 GW |
68 | /* From shm.h */ |
69 | struct shmid_ds *shmsegs; | |
70 | struct shminfo shminfo; | |
71 | ||
4c45483e GW |
72 | int shmat(), shmctl(), shmdt(), shmget(); /* XXX */ |
73 | int (*shmcalls[])() = { shmat, shmctl, shmdt, shmget }; /* XXX */ | |
15637ed4 RG |
74 | int shmtot = 0; |
75 | ||
76 | /* | |
77 | * Per process internal structure for managing segments. | |
78 | * Each process using shm will have an array of ``shmseg'' of these. | |
79 | */ | |
80 | struct shmdesc { | |
81 | vm_offset_t shmd_uva; | |
82 | int shmd_id; | |
83 | }; | |
84 | ||
85 | /* | |
86 | * Per segment internal structure (shm_handle). | |
87 | */ | |
88 | struct shmhandle { | |
89 | vm_offset_t shmh_kva; | |
90 | caddr_t shmh_id; | |
91 | }; | |
92 | ||
fde1aeb2 | 93 | static int ipcaccess(struct ipc_perm *, int, struct ucred *); |
4c45483e GW |
94 | static void shmufree(struct proc *, struct shmdesc *); |
95 | static void shmfree(struct shmid_ds *); | |
fde1aeb2 GW |
96 | static int shmvalid(int); |
97 | ||
4c45483e | 98 | |
15637ed4 RG |
99 | vm_map_t shm_map; /* address space for shared memory segments */ |
100 | ||
4c45483e | 101 | void |
15637ed4 RG |
102 | shminit() |
103 | { | |
104 | register int i; | |
105 | vm_offset_t whocares1, whocares2; | |
106 | ||
107 | shm_map = kmem_suballoc(kernel_map, &whocares1, &whocares2, | |
108 | shminfo.shmall * NBPG, FALSE); | |
109 | if (shminfo.shmmni > SHMMMNI) | |
110 | shminfo.shmmni = SHMMMNI; | |
111 | for (i = 0; i < shminfo.shmmni; i++) { | |
112 | shmsegs[i].shm_perm.mode = 0; | |
113 | shmsegs[i].shm_perm.seq = 0; | |
114 | } | |
115 | } | |
116 | ||
3228baa0 GW |
117 | TEXT_SET(pseudo_set, shminit); |
118 | ||
15637ed4 RG |
119 | /* |
120 | * Entry point for all SHM calls | |
121 | */ | |
3c7eb27c DG |
122 | |
123 | struct shmsys_args { | |
124 | u_int which; | |
125 | }; | |
126 | ||
4c45483e | 127 | int |
15637ed4 RG |
128 | shmsys(p, uap, retval) |
129 | struct proc *p; | |
3c7eb27c | 130 | struct shmsys_args *uap; |
15637ed4 RG |
131 | int *retval; |
132 | { | |
133 | ||
134 | if (uap->which >= sizeof(shmcalls)/sizeof(shmcalls[0])) | |
135 | return (EINVAL); | |
136 | return ((*shmcalls[uap->which])(p, &uap[1], retval)); | |
137 | } | |
138 | ||
139 | /* | |
140 | * Get a shared memory segment | |
141 | */ | |
3c7eb27c DG |
142 | |
143 | struct shmget_args { | |
144 | key_t key; | |
145 | int size; | |
146 | int shmflg; | |
147 | }; | |
148 | ||
4c45483e | 149 | int |
15637ed4 RG |
150 | shmget(p, uap, retval) |
151 | struct proc *p; | |
3c7eb27c | 152 | register struct shmget_args *uap; |
15637ed4 RG |
153 | int *retval; |
154 | { | |
155 | register struct shmid_ds *shp; | |
156 | register struct ucred *cred = p->p_ucred; | |
157 | register int i; | |
158 | int error, size, rval = 0; | |
159 | register struct shmhandle *shmh; | |
160 | ||
161 | /* look up the specified shm_id */ | |
162 | if (uap->key != IPC_PRIVATE) { | |
163 | for (i = 0; i < shminfo.shmmni; i++) | |
164 | if ((shmsegs[i].shm_perm.mode & SHM_ALLOC) && | |
165 | shmsegs[i].shm_perm.key == uap->key) { | |
166 | rval = i; | |
167 | break; | |
168 | } | |
169 | } else | |
170 | i = shminfo.shmmni; | |
171 | ||
172 | /* create a new shared segment if necessary */ | |
173 | if (i == shminfo.shmmni) { | |
174 | if ((uap->shmflg & IPC_CREAT) == 0) | |
175 | return (ENOENT); | |
176 | if (uap->size < shminfo.shmmin || uap->size > shminfo.shmmax) | |
177 | return (EINVAL); | |
178 | for (i = 0; i < shminfo.shmmni; i++) | |
179 | if ((shmsegs[i].shm_perm.mode & SHM_ALLOC) == 0) { | |
180 | rval = i; | |
181 | break; | |
182 | } | |
183 | if (i == shminfo.shmmni) | |
184 | return (ENOSPC); | |
185 | size = clrnd(btoc(uap->size)); | |
186 | if (shmtot + size > shminfo.shmall) | |
187 | return (ENOMEM); | |
188 | shp = &shmsegs[rval]; | |
189 | /* | |
190 | * We need to do a couple of things to ensure consistency | |
191 | * in case we sleep in malloc(). We mark segment as | |
192 | * allocated so that other shmgets() will not allocate it. | |
193 | * We mark it as "destroyed" to insure that shmvalid() is | |
194 | * false making most operations fail (XXX). We set the key, | |
195 | * so that other shmget()s will fail. | |
196 | */ | |
197 | shp->shm_perm.mode = SHM_ALLOC | SHM_DEST; | |
198 | shp->shm_perm.key = uap->key; | |
199 | shmh = (struct shmhandle *) | |
200 | malloc(sizeof(struct shmhandle), M_SHM, M_WAITOK); | |
201 | shmh->shmh_kva = 0; | |
fde1aeb2 | 202 | shmh->shmh_id = (caddr_t)(0xc0000000UL|rval); /* XXX */ |
15637ed4 | 203 | error = vm_mmap(shm_map, &shmh->shmh_kva, ctob(size), |
5af262ca | 204 | VM_PROT_ALL, VM_PROT_DEFAULT, MAP_ANON, shmh->shmh_id, 0); |
15637ed4 RG |
205 | if (error) { |
206 | free((caddr_t)shmh, M_SHM); | |
207 | shp->shm_perm.mode = 0; | |
208 | return(ENOMEM); | |
209 | } | |
210 | shp->shm_handle = (void *) shmh; | |
211 | shmtot += size; | |
212 | shp->shm_perm.cuid = shp->shm_perm.uid = cred->cr_uid; | |
213 | shp->shm_perm.cgid = shp->shm_perm.gid = cred->cr_gid; | |
214 | shp->shm_perm.mode = SHM_ALLOC | (uap->shmflg&0777); | |
215 | shp->shm_segsz = uap->size; | |
216 | shp->shm_cpid = p->p_pid; | |
217 | shp->shm_lpid = shp->shm_nattch = 0; | |
218 | shp->shm_atime = shp->shm_dtime = 0; | |
219 | shp->shm_ctime = time.tv_sec; | |
220 | } else { | |
221 | shp = &shmsegs[rval]; | |
222 | /* XXX: probably not the right thing to do */ | |
223 | if (shp->shm_perm.mode & SHM_DEST) | |
224 | return (EBUSY); | |
225 | if (error = ipcaccess(&shp->shm_perm, uap->shmflg&0777, cred)) | |
226 | return (error); | |
227 | if (uap->size && uap->size > shp->shm_segsz) | |
228 | return (EINVAL); | |
229 | if ((uap->shmflg&IPC_CREAT) && (uap->shmflg&IPC_EXCL)) | |
230 | return (EEXIST); | |
231 | } | |
232 | *retval = shp->shm_perm.seq * SHMMMNI + rval; | |
233 | return (0); | |
234 | } | |
235 | ||
236 | /* | |
237 | * Shared memory control | |
238 | */ | |
3c7eb27c DG |
239 | |
240 | struct shmctl_args { | |
241 | int shmid; | |
242 | int cmd; | |
243 | caddr_t buf; | |
244 | }; | |
245 | ||
15637ed4 | 246 | /* ARGSUSED */ |
4c45483e | 247 | int |
15637ed4 RG |
248 | shmctl(p, uap, retval) |
249 | struct proc *p; | |
3c7eb27c | 250 | register struct shmctl_args *uap; |
15637ed4 RG |
251 | int *retval; |
252 | { | |
253 | register struct shmid_ds *shp; | |
254 | register struct ucred *cred = p->p_ucred; | |
255 | struct shmid_ds sbuf; | |
256 | int error; | |
257 | ||
258 | if (error = shmvalid(uap->shmid)) | |
259 | return (error); | |
260 | shp = &shmsegs[uap->shmid % SHMMMNI]; | |
261 | switch (uap->cmd) { | |
262 | case IPC_STAT: | |
263 | if (error = ipcaccess(&shp->shm_perm, IPC_R, cred)) | |
264 | return (error); | |
265 | return (copyout((caddr_t)shp, uap->buf, sizeof(*shp))); | |
266 | ||
267 | case IPC_SET: | |
268 | if (cred->cr_uid && cred->cr_uid != shp->shm_perm.uid && | |
269 | cred->cr_uid != shp->shm_perm.cuid) | |
270 | return (EPERM); | |
271 | if (error = copyin(uap->buf, (caddr_t)&sbuf, sizeof sbuf)) | |
272 | return (error); | |
273 | shp->shm_perm.uid = sbuf.shm_perm.uid; | |
274 | shp->shm_perm.gid = sbuf.shm_perm.gid; | |
275 | shp->shm_perm.mode = (shp->shm_perm.mode & ~0777) | |
276 | | (sbuf.shm_perm.mode & 0777); | |
277 | shp->shm_ctime = time.tv_sec; | |
278 | break; | |
279 | ||
280 | case IPC_RMID: | |
281 | if (cred->cr_uid && cred->cr_uid != shp->shm_perm.uid && | |
282 | cred->cr_uid != shp->shm_perm.cuid) | |
283 | return (EPERM); | |
284 | /* set ctime? */ | |
285 | shp->shm_perm.key = IPC_PRIVATE; | |
286 | shp->shm_perm.mode |= SHM_DEST; | |
287 | if (shp->shm_nattch <= 0) | |
288 | shmfree(shp); | |
289 | break; | |
290 | ||
291 | #ifdef HPUXCOMPAT | |
292 | case SHM_LOCK: | |
293 | case SHM_UNLOCK: | |
294 | /* don't really do anything, but make them think we did */ | |
295 | if ((p->p_flag & SHPUX) == 0) | |
296 | return (EINVAL); | |
297 | if (cred->cr_uid && cred->cr_uid != shp->shm_perm.uid && | |
298 | cred->cr_uid != shp->shm_perm.cuid) | |
299 | return (EPERM); | |
300 | break; | |
301 | #endif | |
302 | ||
303 | default: | |
304 | return (EINVAL); | |
305 | } | |
306 | return (0); | |
307 | } | |
308 | ||
309 | /* | |
310 | * Attach to shared memory segment. | |
311 | */ | |
3c7eb27c DG |
312 | |
313 | struct shmat_args { | |
314 | int shmid; | |
315 | caddr_t shmaddr; | |
316 | int shmflg; | |
317 | }; | |
318 | ||
4c45483e | 319 | int |
15637ed4 RG |
320 | shmat(p, uap, retval) |
321 | struct proc *p; | |
3c7eb27c | 322 | register struct shmat_args *uap; |
15637ed4 RG |
323 | int *retval; |
324 | { | |
325 | register struct shmid_ds *shp; | |
326 | register int size; | |
327 | caddr_t uva; | |
328 | int error; | |
329 | int flags; | |
330 | vm_prot_t prot; | |
331 | struct shmdesc *shmd; | |
332 | ||
333 | /* | |
334 | * Allocate descriptors now (before validity check) | |
335 | * in case malloc() blocks. | |
336 | */ | |
337 | shmd = (struct shmdesc *)p->p_vmspace->vm_shm; | |
338 | size = shminfo.shmseg * sizeof(struct shmdesc); | |
339 | if (shmd == NULL) { | |
340 | shmd = (struct shmdesc *)malloc(size, M_SHM, M_WAITOK); | |
341 | bzero((caddr_t)shmd, size); | |
342 | p->p_vmspace->vm_shm = (caddr_t)shmd; | |
343 | } | |
344 | if (error = shmvalid(uap->shmid)) | |
345 | return (error); | |
346 | shp = &shmsegs[uap->shmid % SHMMMNI]; | |
347 | if (shp->shm_handle == NULL) | |
348 | panic("shmat NULL handle"); | |
349 | if (error = ipcaccess(&shp->shm_perm, | |
350 | (uap->shmflg&SHM_RDONLY) ? IPC_R : IPC_R|IPC_W, p->p_ucred)) | |
351 | return (error); | |
352 | uva = uap->shmaddr; | |
353 | if (uva && ((int)uva & (SHMLBA-1))) { | |
354 | if (uap->shmflg & SHM_RND) | |
355 | uva = (caddr_t) ((int)uva & ~(SHMLBA-1)); | |
356 | else | |
357 | return (EINVAL); | |
358 | } | |
359 | /* | |
360 | * Make sure user doesn't use more than their fair share | |
361 | */ | |
362 | for (size = 0; size < shminfo.shmseg; size++) { | |
363 | if (shmd->shmd_uva == 0) | |
364 | break; | |
365 | shmd++; | |
366 | } | |
367 | if (size >= shminfo.shmseg) | |
368 | return (EMFILE); | |
369 | size = ctob(clrnd(btoc(shp->shm_segsz))); | |
370 | prot = VM_PROT_READ; | |
371 | if ((uap->shmflg & SHM_RDONLY) == 0) | |
372 | prot |= VM_PROT_WRITE; | |
373 | flags = MAP_ANON|MAP_SHARED; | |
374 | if (uva) | |
375 | flags |= MAP_FIXED; | |
376 | else | |
fde1aeb2 GW |
377 | uva = (caddr_t)0x1000000UL; /* XXX */ |
378 | error = vm_mmap(&p->p_vmspace->vm_map, (vm_offset_t *)&uva, | |
379 | (vm_size_t)size, prot, VM_PROT_DEFAULT, | |
380 | flags, ((struct shmhandle *)shp->shm_handle)->shmh_id, | |
381 | 0); | |
15637ed4 RG |
382 | if (error) |
383 | return(error); | |
384 | shmd->shmd_uva = (vm_offset_t)uva; | |
385 | shmd->shmd_id = uap->shmid; | |
386 | /* | |
387 | * Fill in the remaining fields | |
388 | */ | |
389 | shp->shm_lpid = p->p_pid; | |
390 | shp->shm_atime = time.tv_sec; | |
391 | shp->shm_nattch++; | |
392 | *retval = (int) uva; | |
393 | return (0); | |
394 | } | |
395 | ||
396 | /* | |
397 | * Detach from shared memory segment. | |
398 | */ | |
3c7eb27c DG |
399 | |
400 | struct shmdt_args { | |
401 | caddr_t shmaddr; | |
402 | }; | |
403 | ||
15637ed4 | 404 | /* ARGSUSED */ |
4c45483e | 405 | int |
15637ed4 RG |
406 | shmdt(p, uap, retval) |
407 | struct proc *p; | |
3c7eb27c | 408 | struct shmdt_args *uap; |
15637ed4 RG |
409 | int *retval; |
410 | { | |
411 | register struct shmdesc *shmd; | |
412 | register int i; | |
413 | ||
414 | shmd = (struct shmdesc *)p->p_vmspace->vm_shm; | |
415 | for (i = 0; i < shminfo.shmseg; i++, shmd++) | |
416 | if (shmd->shmd_uva && | |
417 | shmd->shmd_uva == (vm_offset_t)uap->shmaddr) | |
418 | break; | |
419 | if (i == shminfo.shmseg) | |
420 | return(EINVAL); | |
421 | shmufree(p, shmd); | |
422 | shmsegs[shmd->shmd_id % SHMMMNI].shm_lpid = p->p_pid; | |
4c45483e | 423 | return 0; |
15637ed4 RG |
424 | } |
425 | ||
4c45483e | 426 | void |
15637ed4 RG |
427 | shmfork(p1, p2, isvfork) |
428 | struct proc *p1, *p2; | |
429 | int isvfork; | |
430 | { | |
431 | register struct shmdesc *shmd; | |
432 | register int size; | |
433 | ||
434 | /* | |
435 | * Copy parents descriptive information | |
436 | */ | |
437 | size = shminfo.shmseg * sizeof(struct shmdesc); | |
438 | shmd = (struct shmdesc *)malloc(size, M_SHM, M_WAITOK); | |
439 | bcopy((caddr_t)p1->p_vmspace->vm_shm, (caddr_t)shmd, size); | |
440 | p2->p_vmspace->vm_shm = (caddr_t)shmd; | |
441 | /* | |
442 | * Increment reference counts | |
443 | */ | |
444 | for (size = 0; size < shminfo.shmseg; size++, shmd++) | |
445 | if (shmd->shmd_uva) | |
446 | shmsegs[shmd->shmd_id % SHMMMNI].shm_nattch++; | |
447 | } | |
448 | ||
4c45483e | 449 | void |
15637ed4 RG |
450 | shmexit(p) |
451 | struct proc *p; | |
452 | { | |
453 | register struct shmdesc *shmd; | |
454 | register int i; | |
455 | ||
456 | shmd = (struct shmdesc *)p->p_vmspace->vm_shm; | |
457 | for (i = 0; i < shminfo.shmseg; i++, shmd++) | |
458 | if (shmd->shmd_uva) | |
459 | shmufree(p, shmd); | |
460 | free((caddr_t)p->p_vmspace->vm_shm, M_SHM); | |
461 | p->p_vmspace->vm_shm = NULL; | |
462 | } | |
463 | ||
fde1aeb2 | 464 | static int |
15637ed4 RG |
465 | shmvalid(id) |
466 | register int id; | |
467 | { | |
468 | register struct shmid_ds *shp; | |
469 | ||
470 | if (id < 0 || (id % SHMMMNI) >= shminfo.shmmni) | |
471 | return(EINVAL); | |
472 | shp = &shmsegs[id % SHMMMNI]; | |
473 | if (shp->shm_perm.seq == (id / SHMMMNI) && | |
474 | (shp->shm_perm.mode & (SHM_ALLOC|SHM_DEST)) == SHM_ALLOC) | |
475 | return(0); | |
476 | return(EINVAL); | |
477 | } | |
478 | ||
479 | /* | |
480 | * Free user resources associated with a shared memory segment | |
481 | */ | |
4c45483e | 482 | static void |
15637ed4 RG |
483 | shmufree(p, shmd) |
484 | struct proc *p; | |
485 | struct shmdesc *shmd; | |
486 | { | |
487 | register struct shmid_ds *shp; | |
488 | ||
489 | shp = &shmsegs[shmd->shmd_id % SHMMMNI]; | |
490 | (void) vm_deallocate(&p->p_vmspace->vm_map, shmd->shmd_uva, | |
491 | ctob(clrnd(btoc(shp->shm_segsz)))); | |
492 | shmd->shmd_id = 0; | |
493 | shmd->shmd_uva = 0; | |
494 | shp->shm_dtime = time.tv_sec; | |
495 | if (--shp->shm_nattch <= 0 && (shp->shm_perm.mode & SHM_DEST)) | |
496 | shmfree(shp); | |
497 | } | |
498 | ||
499 | /* | |
500 | * Deallocate resources associated with a shared memory segment | |
501 | */ | |
4c45483e | 502 | static void |
15637ed4 RG |
503 | shmfree(shp) |
504 | register struct shmid_ds *shp; | |
505 | { | |
506 | ||
507 | if (shp->shm_handle == NULL) | |
508 | panic("shmfree"); | |
509 | /* | |
510 | * Lose our lingering object reference by deallocating space | |
511 | * in kernel. Pager will also be deallocated as a side-effect. | |
512 | */ | |
513 | vm_deallocate(shm_map, | |
514 | ((struct shmhandle *)shp->shm_handle)->shmh_kva, | |
515 | ctob(clrnd(btoc(shp->shm_segsz)))); | |
516 | free((caddr_t)shp->shm_handle, M_SHM); | |
517 | shp->shm_handle = NULL; | |
518 | shmtot -= clrnd(btoc(shp->shm_segsz)); | |
519 | shp->shm_perm.mode = 0; | |
520 | /* | |
521 | * Increment the sequence number to ensure that outstanding | |
522 | * shmids for this segment will be invalid in the event that | |
523 | * the segment is reallocated. Note that shmids must be | |
524 | * positive as decreed by SVID. | |
525 | */ | |
526 | shp->shm_perm.seq++; | |
527 | if ((int)(shp->shm_perm.seq * SHMMMNI) < 0) | |
528 | shp->shm_perm.seq = 0; | |
529 | } | |
15637ed4 | 530 | #endif /* SYSVSHM */ |