1 /* 2 * Copyright (c) 1994 SigmaSoft, Th. Lockert <tholo@sigmasoft.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <assert.h> 32 #include <err.h> 33 #include <fcntl.h> 34 #include <grp.h> 35 #include <kvm.h> 36 #include <nlist.h> 37 #include <limits.h> 38 #include <paths.h> 39 #include <pwd.h> 40 #include <stddef.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 #include <sys/types.h> 47 #include <sys/param.h> 48 #include <sys/time.h> 49 #include <sys/proc.h> 50 #include <sys/sysctl.h> 51 #define _KERNEL 52 #include <sys/ipc.h> 53 #include <sys/sem.h> 54 #include <sys/shm.h> 55 #include <sys/msg.h> 56 57 /* SysCtlGatherStruct structure. */ 58 struct scgs_vector { 59 const char *sysctl; 60 off_t offset; 61 size_t size; 62 }; 63 64 int use_sysctl = 1; 65 struct semid_kernel *sema; 66 struct seminfo seminfo; 67 struct msginfo msginfo; 68 struct msqid_kernel *msqids; 69 struct shminfo shminfo; 70 struct shmid_kernel *shmsegs; 71 72 char *fmt_perm(u_short); 73 void cvt_time(time_t, char *); 74 void sysctlgatherstruct(void *addr, size_t size, struct scgs_vector *vec); 75 void kget(int idx, void *addr, size_t size); 76 void usage(void); 77 uid_t user2uid(char *username); 78 79 static struct nlist symbols[] = { 80 {"sema"}, 81 #define X_SEMA 0 82 {"seminfo"}, 83 #define X_SEMINFO 1 84 {"msginfo"}, 85 #define X_MSGINFO 2 86 {"msqids"}, 87 #define X_MSQIDS 3 88 {"shminfo"}, 89 #define X_SHMINFO 4 90 {"shmsegs"}, 91 #define X_SHMSEGS 5 92 {NULL} 93 }; 94 95 #define SHMINFO_XVEC \ 96 X(shmmax, sizeof(int)) \ 97 X(shmmin, sizeof(int)) \ 98 X(shmmni, sizeof(int)) \ 99 X(shmseg, sizeof(int)) \ 100 X(shmall, sizeof(int)) 101 102 #define SEMINFO_XVEC \ 103 X(semmap, sizeof(int)) \ 104 X(semmni, sizeof(int)) \ 105 X(semmns, sizeof(int)) \ 106 X(semmnu, sizeof(int)) \ 107 X(semmsl, sizeof(int)) \ 108 X(semopm, sizeof(int)) \ 109 X(semume, sizeof(int)) \ 110 X(semusz, sizeof(int)) \ 111 X(semvmx, sizeof(int)) \ 112 X(semaem, sizeof(int)) 113 114 #define MSGINFO_XVEC \ 115 X(msgmax, sizeof(int)) \ 116 X(msgmni, sizeof(int)) \ 117 X(msgmnb, sizeof(int)) \ 118 X(msgtql, sizeof(int)) \ 119 X(msgssz, sizeof(int)) \ 120 X(msgseg, sizeof(int)) 121 122 #define X(a, b) { "kern.ipc." #a, offsetof(TYPEC, a), (b) }, 123 #define TYPEC struct shminfo 124 struct scgs_vector shminfo_scgsv[] = { SHMINFO_XVEC { NULL } }; 125 #undef TYPEC 126 #define TYPEC struct seminfo 127 struct scgs_vector seminfo_scgsv[] = { SEMINFO_XVEC { NULL } }; 128 #undef TYPEC 129 #define TYPEC struct msginfo 130 struct scgs_vector msginfo_scgsv[] = { MSGINFO_XVEC { NULL } }; 131 #undef TYPEC 132 #undef X 133 134 static kvm_t *kd; 135 136 char * 137 fmt_perm(u_short mode) 138 { 139 static char buffer[100]; 140 141 buffer[0] = '-'; 142 buffer[1] = '-'; 143 buffer[2] = ((mode & 0400) ? 'r' : '-'); 144 buffer[3] = ((mode & 0200) ? 'w' : '-'); 145 buffer[4] = ((mode & 0100) ? 'a' : '-'); 146 buffer[5] = ((mode & 0040) ? 'r' : '-'); 147 buffer[6] = ((mode & 0020) ? 'w' : '-'); 148 buffer[7] = ((mode & 0010) ? 'a' : '-'); 149 buffer[8] = ((mode & 0004) ? 'r' : '-'); 150 buffer[9] = ((mode & 0002) ? 'w' : '-'); 151 buffer[10] = ((mode & 0001) ? 'a' : '-'); 152 buffer[11] = '\0'; 153 return (&buffer[0]); 154 } 155 156 void 157 cvt_time(time_t t, char *buf) 158 { 159 struct tm *tm; 160 161 if (t == 0) { 162 strcpy(buf, "no-entry"); 163 } else { 164 tm = localtime(&t); 165 sprintf(buf, "%2d:%02d:%02d", 166 tm->tm_hour, tm->tm_min, tm->tm_sec); 167 } 168 } 169 #define SHMINFO 1 170 #define SHMTOTAL 2 171 #define MSGINFO 4 172 #define MSGTOTAL 8 173 #define SEMINFO 16 174 #define SEMTOTAL 32 175 176 #define BIGGEST 1 177 #define CREATOR 2 178 #define OUTSTANDING 4 179 #define PID 8 180 #define TIME 16 181 182 int 183 main(int argc, char *argv[]) 184 { 185 int display = SHMINFO | MSGINFO | SEMINFO; 186 int option = 0; 187 char *core = NULL, *user = NULL, *namelist = NULL; 188 char kvmoferr[_POSIX2_LINE_MAX]; /* Error buf for kvm_openfiles. */ 189 int i; 190 uid_t uid; 191 192 while ((i = getopt(argc, argv, "MmQqSsabC:cN:optTu:y")) != -1) 193 switch (i) { 194 case 'M': 195 display = SHMTOTAL; 196 break; 197 case 'm': 198 display = SHMINFO; 199 break; 200 case 'Q': 201 display = MSGTOTAL; 202 break; 203 case 'q': 204 display = MSGINFO; 205 break; 206 case 'S': 207 display = SEMTOTAL; 208 break; 209 case 's': 210 display = SEMINFO; 211 break; 212 case 'T': 213 display = SHMTOTAL | MSGTOTAL | SEMTOTAL; 214 break; 215 case 'a': 216 option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME; 217 break; 218 case 'b': 219 option |= BIGGEST; 220 break; 221 case 'C': 222 core = optarg; 223 break; 224 case 'c': 225 option |= CREATOR; 226 break; 227 case 'N': 228 namelist = optarg; 229 break; 230 case 'o': 231 option |= OUTSTANDING; 232 break; 233 case 'p': 234 option |= PID; 235 break; 236 case 't': 237 option |= TIME; 238 break; 239 case 'y': 240 use_sysctl = 0; 241 break; 242 case 'u': 243 user = optarg; 244 uid = user2uid(user); 245 break; 246 default: 247 usage(); 248 } 249 250 /* 251 * If paths to the exec file or core file were specified, we 252 * aren't operating on the running kernel, so we can't use 253 * sysctl. 254 */ 255 if (namelist != NULL || core != NULL) 256 use_sysctl = 0; 257 258 if (!use_sysctl) { 259 kd = kvm_openfiles(namelist, core, NULL, O_RDONLY, kvmoferr); 260 if (kd == NULL) 261 errx(1, "kvm_openfiles: %s", kvmoferr); 262 switch (kvm_nlist(kd, symbols)) { 263 case 0: 264 break; 265 case -1: 266 errx(1, "unable to read kernel symbol table"); 267 default: 268 #ifdef notdef /* they'll be told more civilly later */ 269 warnx("nlist failed"); 270 for (i = 0; symbols[i].n_name != NULL; i++) 271 if (symbols[i].n_value == 0) 272 warnx("symbol %s not found", 273 symbols[i].n_name); 274 #endif 275 break; 276 } 277 } 278 279 kget(X_MSGINFO, &msginfo, sizeof(msginfo)); 280 if ((display & (MSGINFO | MSGTOTAL))) { 281 if (display & MSGTOTAL) { 282 printf("msginfo:\n"); 283 printf("\tmsgmax: %6d\t(max characters in a message)\n", 284 msginfo.msgmax); 285 printf("\tmsgmni: %6d\t(# of message queues)\n", 286 msginfo.msgmni); 287 printf("\tmsgmnb: %6d\t(max characters in a message queue)\n", 288 msginfo.msgmnb); 289 printf("\tmsgtql: %6d\t(max # of messages in system)\n", 290 msginfo.msgtql); 291 printf("\tmsgssz: %6d\t(size of a message segment)\n", 292 msginfo.msgssz); 293 printf("\tmsgseg: %6d\t(# of message segments in system)\n\n", 294 msginfo.msgseg); 295 } 296 if (display & MSGINFO) { 297 struct msqid_kernel *kxmsqids; 298 size_t kxmsqids_len; 299 300 301 kxmsqids_len = sizeof(struct msqid_kernel) * msginfo.msgmni; 302 kxmsqids = malloc(kxmsqids_len); 303 kget(X_MSQIDS, kxmsqids, kxmsqids_len); 304 305 printf("Message Queues:\n"); 306 printf("T ID KEY MODE OWNER GROUP"); 307 if (option & CREATOR) 308 printf(" CREATOR CGROUP"); 309 if (option & OUTSTANDING) 310 printf(" CBYTES QNUM"); 311 if (option & BIGGEST) 312 printf(" QBYTES"); 313 if (option & PID) 314 printf(" LSPID LRPID"); 315 if (option & TIME) 316 printf(" STIME RTIME CTIME"); 317 printf("\n"); 318 for (i = 0; i < msginfo.msgmni; i += 1) { 319 if (kxmsqids[i].u.msg_qbytes != 0) { 320 char stime_buf[100], rtime_buf[100], 321 ctime_buf[100]; 322 struct msqid_kernel *kmsqptr = &kxmsqids[i]; 323 324 if (user) 325 if (uid != kmsqptr->u.msg_perm.uid) 326 continue; 327 cvt_time(kmsqptr->u.msg_stime, stime_buf); 328 cvt_time(kmsqptr->u.msg_rtime, rtime_buf); 329 cvt_time(kmsqptr->u.msg_ctime, ctime_buf); 330 331 printf("q %6d %10d %s %8s %8s", 332 IXSEQ_TO_IPCID(i, kmsqptr->u.msg_perm), 333 (int)kmsqptr->u.msg_perm.key, 334 fmt_perm(kmsqptr->u.msg_perm.mode), 335 user_from_uid(kmsqptr->u.msg_perm.uid, 0), 336 group_from_gid(kmsqptr->u.msg_perm.gid, 0)); 337 338 if (option & CREATOR) 339 printf(" %8s %8s", 340 user_from_uid(kmsqptr->u.msg_perm.cuid, 0), 341 group_from_gid(kmsqptr->u.msg_perm.cgid, 0)); 342 343 if (option & OUTSTANDING) 344 printf(" %6lu %6lu", 345 kmsqptr->u.msg_cbytes, 346 kmsqptr->u.msg_qnum); 347 348 if (option & BIGGEST) 349 printf(" %6lu", 350 kmsqptr->u.msg_qbytes); 351 352 if (option & PID) 353 printf(" %6d %6d", 354 kmsqptr->u.msg_lspid, 355 kmsqptr->u.msg_lrpid); 356 357 if (option & TIME) 358 printf(" %s %s %s", 359 stime_buf, 360 rtime_buf, 361 ctime_buf); 362 363 printf("\n"); 364 } 365 } 366 printf("\n"); 367 } 368 } else 369 if (display & (MSGINFO | MSGTOTAL)) { 370 fprintf(stderr, 371 "SVID messages facility not configured in the system\n"); 372 } 373 374 kget(X_SHMINFO, &shminfo, sizeof(shminfo)); 375 if ((display & (SHMINFO | SHMTOTAL))) { 376 if (display & SHMTOTAL) { 377 printf("shminfo:\n"); 378 printf("\tshmmax: %7d\t(max shared memory segment size)\n", 379 shminfo.shmmax); 380 printf("\tshmmin: %7d\t(min shared memory segment size)\n", 381 shminfo.shmmin); 382 printf("\tshmmni: %7d\t(max number of shared memory identifiers)\n", 383 shminfo.shmmni); 384 printf("\tshmseg: %7d\t(max shared memory segments per process)\n", 385 shminfo.shmseg); 386 printf("\tshmall: %7d\t(max amount of shared memory in pages)\n\n", 387 shminfo.shmall); 388 } 389 if (display & SHMINFO) { 390 struct shmid_kernel *kxshmids; 391 size_t kxshmids_len; 392 393 kxshmids_len = sizeof(struct shmid_kernel) * shminfo.shmmni; 394 kxshmids = malloc(kxshmids_len); 395 kget(X_SHMSEGS, kxshmids, kxshmids_len); 396 397 printf("Shared Memory:\n"); 398 printf("T ID KEY MODE OWNER GROUP"); 399 if (option & CREATOR) 400 printf(" CREATOR CGROUP"); 401 if (option & OUTSTANDING) 402 printf(" NATTCH"); 403 if (option & BIGGEST) 404 printf(" SEGSZ"); 405 if (option & PID) 406 printf(" CPID LPID"); 407 if (option & TIME) 408 printf(" ATIME DTIME CTIME"); 409 printf("\n"); 410 for (i = 0; i < shminfo.shmmni; i += 1) { 411 if (kxshmids[i].u.shm_perm.mode & 0x0800) { 412 char atime_buf[100], dtime_buf[100], 413 ctime_buf[100]; 414 struct shmid_kernel *kshmptr = &kxshmids[i]; 415 416 if (user) 417 if (uid != kshmptr->u.shm_perm.uid) 418 continue; 419 cvt_time(kshmptr->u.shm_atime, atime_buf); 420 cvt_time(kshmptr->u.shm_dtime, dtime_buf); 421 cvt_time(kshmptr->u.shm_ctime, ctime_buf); 422 423 printf("m %6d %10d %s %8s %8s", 424 IXSEQ_TO_IPCID(i, kshmptr->u.shm_perm), 425 (int)kshmptr->u.shm_perm.key, 426 fmt_perm(kshmptr->u.shm_perm.mode), 427 user_from_uid(kshmptr->u.shm_perm.uid, 0), 428 group_from_gid(kshmptr->u.shm_perm.gid, 0)); 429 430 if (option & CREATOR) 431 printf(" %8s %8s", 432 user_from_uid(kshmptr->u.shm_perm.cuid, 0), 433 group_from_gid(kshmptr->u.shm_perm.cgid, 0)); 434 435 if (option & OUTSTANDING) 436 printf(" %6d", 437 kshmptr->u.shm_nattch); 438 439 if (option & BIGGEST) 440 printf(" %6d", 441 kshmptr->u.shm_segsz); 442 443 if (option & PID) 444 printf(" %6d %6d", 445 kshmptr->u.shm_cpid, 446 kshmptr->u.shm_lpid); 447 448 if (option & TIME) 449 printf(" %s %s %s", 450 atime_buf, 451 dtime_buf, 452 ctime_buf); 453 454 printf("\n"); 455 } 456 } 457 printf("\n"); 458 } 459 } else 460 if (display & (SHMINFO | SHMTOTAL)) { 461 fprintf(stderr, 462 "SVID shared memory facility not configured in the system\n"); 463 } 464 465 kget(X_SEMINFO, &seminfo, sizeof(seminfo)); 466 if ((display & (SEMINFO | SEMTOTAL))) { 467 struct semid_kernel *kxsema; 468 size_t kxsema_len; 469 470 if (display & SEMTOTAL) { 471 printf("seminfo:\n"); 472 printf("\tsemmap: %6d\t(# of entries in semaphore map)\n", 473 seminfo.semmap); 474 printf("\tsemmni: %6d\t(# of semaphore identifiers)\n", 475 seminfo.semmni); 476 printf("\tsemmns: %6d\t(# of semaphores in system)\n", 477 seminfo.semmns); 478 printf("\tsemmnu: %6d\t(# of undo structures in system)\n", 479 seminfo.semmnu); 480 printf("\tsemmsl: %6d\t(max # of semaphores per id)\n", 481 seminfo.semmsl); 482 printf("\tsemopm: %6d\t(max # of operations per semop call)\n", 483 seminfo.semopm); 484 printf("\tsemume: %6d\t(max # of undo entries per process)\n", 485 seminfo.semume); 486 printf("\tsemusz: %6d\t(size in bytes of undo structure)\n", 487 seminfo.semusz); 488 printf("\tsemvmx: %6d\t(semaphore maximum value)\n", 489 seminfo.semvmx); 490 printf("\tsemaem: %6d\t(adjust on exit max value)\n\n", 491 seminfo.semaem); 492 } 493 if (display & SEMINFO) { 494 kxsema_len = sizeof(struct semid_kernel) * seminfo.semmni; 495 kxsema = malloc(kxsema_len); 496 kget(X_SEMA, kxsema, kxsema_len); 497 498 printf("Semaphores:\n"); 499 printf("T ID KEY MODE OWNER GROUP"); 500 if (option & CREATOR) 501 printf(" CREATOR CGROUP"); 502 if (option & BIGGEST) 503 printf(" NSEMS"); 504 if (option & TIME) 505 printf(" OTIME CTIME"); 506 printf("\n"); 507 for (i = 0; i < seminfo.semmni; i += 1) { 508 if ((kxsema[i].u.sem_perm.mode & SEM_ALLOC) != 0) { 509 char ctime_buf[100], otime_buf[100]; 510 struct semid_kernel *ksemaptr = &kxsema[i]; 511 512 if (user) 513 if (uid != ksemaptr->u.sem_perm.uid) 514 continue; 515 cvt_time(ksemaptr->u.sem_otime, otime_buf); 516 cvt_time(ksemaptr->u.sem_ctime, ctime_buf); 517 518 printf("s %6d %10d %s %8s %8s", 519 IXSEQ_TO_IPCID(i, ksemaptr->u.sem_perm), 520 (int)ksemaptr->u.sem_perm.key, 521 fmt_perm(ksemaptr->u.sem_perm.mode), 522 user_from_uid(ksemaptr->u.sem_perm.uid, 0), 523 group_from_gid(ksemaptr->u.sem_perm.gid, 0)); 524 525 if (option & CREATOR) 526 printf(" %8s %8s", 527 user_from_uid(ksemaptr->u.sem_perm.cuid, 0), 528 group_from_gid(ksemaptr->u.sem_perm.cgid, 0)); 529 530 if (option & BIGGEST) 531 printf(" %6d", 532 ksemaptr->u.sem_nsems); 533 534 if (option & TIME) 535 printf(" %s %s", 536 otime_buf, 537 ctime_buf); 538 539 printf("\n"); 540 } 541 } 542 543 printf("\n"); 544 } 545 } else 546 if (display & (SEMINFO | SEMTOTAL)) { 547 fprintf(stderr, "SVID semaphores facility not configured in the system\n"); 548 } 549 if (!use_sysctl) 550 kvm_close(kd); 551 552 exit(0); 553 } 554 555 void 556 sysctlgatherstruct(void *addr, size_t size, struct scgs_vector *vecarr) 557 { 558 struct scgs_vector *xp; 559 size_t tsiz; 560 int rv; 561 562 for (xp = vecarr; xp->sysctl != NULL; xp++) { 563 assert(xp->offset <= size); 564 tsiz = xp->size; 565 rv = sysctlbyname(xp->sysctl, (char *)addr + xp->offset, 566 &tsiz, NULL, 0); 567 if (rv == -1) 568 errx(1, "sysctlbyname: %s", xp->sysctl); 569 if (tsiz != xp->size) 570 errx(1, "%s size mismatch (expected %d, got %d)", 571 xp->sysctl, xp->size, tsiz); 572 } 573 } 574 575 void 576 kget(int idx, void *addr, size_t size) 577 { 578 char *symn; /* symbol name */ 579 size_t tsiz; 580 int rv; 581 unsigned long kaddr; 582 const char *sym2sysctl[] = { /* symbol to sysctl name table */ 583 "kern.ipc.sema", 584 "kern.ipc.seminfo", 585 "kern.ipc.msginfo", 586 "kern.ipc.msqids", 587 "kern.ipc.shminfo", 588 "kern.ipc.shmsegs" }; 589 590 assert((unsigned)idx <= sizeof(sym2sysctl) / sizeof(*sym2sysctl)); 591 if (!use_sysctl) { 592 symn = symbols[idx].n_name; 593 if (*symn == '_') 594 symn++; 595 if (symbols[idx].n_type == 0 || symbols[idx].n_value == 0) 596 errx(1, "symbol %s undefined", symn); 597 /* 598 * For some symbols, the value we retreieve is 599 * actually a pointer; since we want the actual value, 600 * we have to manually dereference it. 601 */ 602 switch (idx) { 603 case X_MSQIDS: 604 tsiz = sizeof(msqids); 605 rv = kvm_read(kd, symbols[idx].n_value, 606 &msqids, tsiz); 607 kaddr = (u_long)msqids; 608 break; 609 case X_SHMSEGS: 610 tsiz = sizeof(shmsegs); 611 rv = kvm_read(kd, symbols[idx].n_value, 612 &shmsegs, tsiz); 613 kaddr = (u_long)shmsegs; 614 break; 615 case X_SEMA: 616 tsiz = sizeof(sema); 617 rv = kvm_read(kd, symbols[idx].n_value, 618 &sema, tsiz); 619 kaddr = (u_long)sema; 620 break; 621 default: 622 rv = tsiz = 0; 623 kaddr = symbols[idx].n_value; 624 break; 625 } 626 if ((unsigned)rv != tsiz) 627 errx(1, "%s: %s", symn, kvm_geterr(kd)); 628 if ((unsigned)kvm_read(kd, kaddr, addr, size) != size) 629 errx(1, "%s: %s", symn, kvm_geterr(kd)); 630 } else { 631 switch (idx) { 632 case X_SHMINFO: 633 sysctlgatherstruct(addr, size, shminfo_scgsv); 634 break; 635 case X_SEMINFO: 636 sysctlgatherstruct(addr, size, seminfo_scgsv); 637 break; 638 case X_MSGINFO: 639 sysctlgatherstruct(addr, size, msginfo_scgsv); 640 break; 641 default: 642 tsiz = size; 643 rv = sysctlbyname(sym2sysctl[idx], addr, &tsiz, 644 NULL, 0); 645 if (rv == -1) 646 err(1, "sysctlbyname: %s", sym2sysctl[idx]); 647 if (tsiz != size) 648 errx(1, "%s size mismatch " 649 "(expected %d, got %d)", 650 sym2sysctl[idx], size, tsiz); 651 break; 652 } 653 } 654 } 655 656 uid_t 657 user2uid(char *username) 658 { 659 struct passwd *pwd; 660 uid_t uid; 661 char *r; 662 663 uid = strtoul(username, &r, 0); 664 if (!*r && r != username) 665 return (uid); 666 if ((pwd = getpwnam(username)) == NULL) 667 errx(1, "getpwnam failed: No such user"); 668 endpwent(); 669 return (pwd->pw_uid); 670 } 671 672 void 673 usage(void) 674 { 675 676 fprintf(stderr, 677 "usage: ipcs [-abcmopqstyMQST] [-C corefile] [-N namelist] [-u user]\n"); 678 exit(1); 679 } 680