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: stable/10/usr.bin/ipcs/ipcs.c 344044 2019-02-12 07:03:37Z avos $"); 30 31#include <sys/param.h> 32#include <sys/proc.h> 33#define _KERNEL 34#include <sys/sem.h> 35#include <sys/shm.h> 36#include <sys/msg.h> 37#undef _KERNEL 38 39#include <err.h> 40#include <fcntl.h> 41#include <grp.h> 42#include <kvm.h> 43#include <limits.h> 44#include <pwd.h> 45#include <stdio.h> 46#include <stdlib.h> 47#include <string.h> 48#include <unistd.h> 49 50#include "ipc.h" 51 52char *fmt_perm(u_short); 53void cvt_time(time_t, char *); 54void usage(void); 55uid_t user2uid(char *username); 56 57void print_kmsqtotal(struct msginfo msginfo); 58void print_kmsqheader(int option); 59void print_kmsqptr(int i, int option, struct msqid_kernel *kmsqptr); 60void print_kshmtotal(struct shminfo shminfo); 61void print_kshmheader(int option); 62void print_kshmptr(int i, int option, struct shmid_kernel *kshmptr); 63void print_ksemtotal(struct seminfo seminfo); 64void print_ksemheader(int option); 65void print_ksemptr(int i, int option, struct semid_kernel *ksemaptr); 66 67char * 68fmt_perm(u_short mode) 69{ 70 static char buffer[100]; 71 72 buffer[0] = '-'; 73 buffer[1] = '-'; 74 buffer[2] = ((mode & 0400) ? 'r' : '-'); 75 buffer[3] = ((mode & 0200) ? 'w' : '-'); 76 buffer[4] = ((mode & 0100) ? 'a' : '-'); 77 buffer[5] = ((mode & 0040) ? 'r' : '-'); 78 buffer[6] = ((mode & 0020) ? 'w' : '-'); 79 buffer[7] = ((mode & 0010) ? 'a' : '-'); 80 buffer[8] = ((mode & 0004) ? 'r' : '-'); 81 buffer[9] = ((mode & 0002) ? 'w' : '-'); 82 buffer[10] = ((mode & 0001) ? 'a' : '-'); 83 buffer[11] = '\0'; 84 return (&buffer[0]); 85} 86 87void 88cvt_time(time_t t, char *buf) 89{ 90 struct tm *tm; 91 92 if (t == 0) { 93 strcpy(buf, "no-entry"); 94 } else { 95 tm = localtime(&t); 96 sprintf(buf, "%2d:%02d:%02d", 97 tm->tm_hour, tm->tm_min, tm->tm_sec); 98 } 99} 100 101#define BIGGEST 1 102#define CREATOR 2 103#define OUTSTANDING 4 104#define PID 8 105#define TIME 16 106 107int 108main(int argc, char *argv[]) 109{ 110 int display = SHMINFO | MSGINFO | SEMINFO; 111 int option = 0; 112 char *core = NULL, *user = NULL, *namelist = NULL; 113 char kvmoferr[_POSIX2_LINE_MAX]; /* Error buf for kvm_openfiles. */ 114 int i; 115 uid_t uid = 0; 116 117 while ((i = getopt(argc, argv, "MmQqSsabC:cN:optTu:y")) != -1) 118 switch (i) { 119 case 'a': 120 option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME; 121 break; 122 case 'b': 123 option |= BIGGEST; 124 break; 125 case 'C': 126 core = optarg; 127 break; 128 case 'c': 129 option |= CREATOR; 130 break; 131 case 'M': 132 display = SHMTOTAL; 133 break; 134 case 'm': 135 display = SHMINFO; 136 break; 137 case 'N': 138 namelist = optarg; 139 break; 140 case 'o': 141 option |= OUTSTANDING; 142 break; 143 case 'p': 144 option |= PID; 145 break; 146 case 'Q': 147 display = MSGTOTAL; 148 break; 149 case 'q': 150 display = MSGINFO; 151 break; 152 case 'S': 153 display = SEMTOTAL; 154 break; 155 case 's': 156 display = SEMINFO; 157 break; 158 case 'T': 159 display = SHMTOTAL | MSGTOTAL | SEMTOTAL; 160 break; 161 case 't': 162 option |= TIME; 163 break; 164 case 'u': 165 user = optarg; 166 uid = user2uid(user); 167 break; 168 case 'y': 169 use_sysctl = 0; 170 break; 171 default: 172 usage(); 173 } 174 175 /* 176 * If paths to the exec file or core file were specified, we 177 * aren't operating on the running kernel, so we can't use 178 * sysctl. 179 */ 180 if (namelist != NULL || core != NULL) 181 use_sysctl = 0; 182 183 if (!use_sysctl) { 184 kd = kvm_openfiles(namelist, core, NULL, O_RDONLY, kvmoferr); 185 if (kd == NULL) 186 errx(1, "kvm_openfiles: %s", kvmoferr); 187 switch (kvm_nlist(kd, symbols)) { 188 case 0: 189 break; 190 case -1: 191 errx(1, "unable to read kernel symbol table"); 192 default: 193 break; 194 } 195 } 196 197 kget(X_MSGINFO, &msginfo, sizeof(msginfo)); 198 if (display & (MSGINFO | MSGTOTAL)) { 199 if (display & MSGTOTAL) 200 print_kmsqtotal(msginfo); 201 202 if (display & MSGINFO) { 203 struct msqid_kernel *kxmsqids; 204 size_t kxmsqids_len; 205 206 kxmsqids_len = 207 sizeof(struct msqid_kernel) * msginfo.msgmni; 208 kxmsqids = malloc(kxmsqids_len); 209 kget(X_MSQIDS, kxmsqids, kxmsqids_len); 210 211 print_kmsqheader(option); 212 213 for (i = 0; i < msginfo.msgmni; i += 1) { 214 if (kxmsqids[i].u.msg_qbytes != 0) { 215 if (user && 216 uid != kxmsqids[i].u.msg_perm.uid) 217 continue; 218 219 print_kmsqptr(i, option, &kxmsqids[i]); 220 } 221 222 } 223 224 printf("\n"); 225 } 226 } 227 228 kget(X_SHMINFO, &shminfo, sizeof(shminfo)); 229 if (display & (SHMINFO | SHMTOTAL)) { 230 231 if (display & SHMTOTAL) 232 print_kshmtotal(shminfo); 233 234 if (display & SHMINFO) { 235 struct shmid_kernel *kxshmids; 236 size_t kxshmids_len; 237 238 kxshmids_len = 239 sizeof(struct shmid_kernel) * shminfo.shmmni; 240 kxshmids = malloc(kxshmids_len); 241 kget(X_SHMSEGS, kxshmids, kxshmids_len); 242 243 print_kshmheader(option); 244 245 for (i = 0; i < shminfo.shmmni; i += 1) { 246 if (kxshmids[i].u.shm_perm.mode & 0x0800) { 247 if (user && 248 uid != kxshmids[i].u.shm_perm.uid) 249 continue; 250 251 print_kshmptr(i, option, &kxshmids[i]); 252 } 253 } 254 printf("\n"); 255 } 256 } 257 258 kget(X_SEMINFO, &seminfo, sizeof(seminfo)); 259 if (display & (SEMINFO | SEMTOTAL)) { 260 struct semid_kernel *kxsema; 261 size_t kxsema_len; 262 263 if (display & SEMTOTAL) 264 print_ksemtotal(seminfo); 265 266 if (display & SEMINFO) { 267 kxsema_len = 268 sizeof(struct semid_kernel) * seminfo.semmni; 269 kxsema = malloc(kxsema_len); 270 kget(X_SEMA, kxsema, kxsema_len); 271 272 print_ksemheader(option); 273 274 for (i = 0; i < seminfo.semmni; i += 1) { 275 if ((kxsema[i].u.sem_perm.mode & SEM_ALLOC) 276 != 0) { 277 if (user && 278 uid != kxsema[i].u.sem_perm.uid) 279 continue; 280 281 print_ksemptr(i, option, &kxsema[i]); 282 283 } 284 } 285 286 printf("\n"); 287 } 288 } 289 290 if (!use_sysctl) 291 kvm_close(kd); 292 293 exit(0); 294} 295 296void 297print_kmsqtotal(struct msginfo msginfo) 298{ 299 300 printf("msginfo:\n"); 301 printf("\tmsgmax: %12d\t(max characters in a message)\n", 302 msginfo.msgmax); 303 printf("\tmsgmni: %12d\t(# of message queues)\n", 304 msginfo.msgmni); 305 printf("\tmsgmnb: %12d\t(max characters in a message queue)\n", 306 msginfo.msgmnb); 307 printf("\tmsgtql: %12d\t(max # of messages in system)\n", 308 msginfo.msgtql); 309 printf("\tmsgssz: %12d\t(size of a message segment)\n", 310 msginfo.msgssz); 311 printf("\tmsgseg: %12d\t(# of message segments in system)\n\n", 312 msginfo.msgseg); 313} 314 315void print_kmsqheader(int option) 316{ 317 318 printf("Message Queues:\n"); 319 printf("T %12s %12s %-11s %-8s %-8s", 320 "ID", "KEY", "MODE", "OWNER", "GROUP"); 321 if (option & CREATOR) 322 printf(" %-8s %-8s", "CREATOR", "CGROUP"); 323 if (option & OUTSTANDING) 324 printf(" %20s %20s", "CBYTES", "QNUM"); 325 if (option & BIGGEST) 326 printf(" %20s", "QBYTES"); 327 if (option & PID) 328 printf(" %12s %12s", "LSPID", "LRPID"); 329 if (option & TIME) 330 printf(" %-8s %-8s %-8s", "STIME", "RTIME", "CTIME"); 331 printf("\n"); 332} 333 334void 335print_kmsqptr(int i, int option, struct msqid_kernel *kmsqptr) 336{ 337 char stime_buf[100], rtime_buf[100], ctime_buf[100]; 338 339 cvt_time(kmsqptr->u.msg_stime, stime_buf); 340 cvt_time(kmsqptr->u.msg_rtime, rtime_buf); 341 cvt_time(kmsqptr->u.msg_ctime, ctime_buf); 342 343 printf("q %12d %12d %s %-8s %-8s", 344 IXSEQ_TO_IPCID(i, kmsqptr->u.msg_perm), 345 (int)kmsqptr->u.msg_perm.key, 346 fmt_perm(kmsqptr->u.msg_perm.mode), 347 user_from_uid(kmsqptr->u.msg_perm.uid, 0), 348 group_from_gid(kmsqptr->u.msg_perm.gid, 0)); 349 350 if (option & CREATOR) 351 printf(" %-8s %-8s", 352 user_from_uid(kmsqptr->u.msg_perm.cuid, 0), 353 group_from_gid(kmsqptr->u.msg_perm.cgid, 0)); 354 355 if (option & OUTSTANDING) 356 printf(" %12lu %12lu", 357 kmsqptr->u.msg_cbytes, 358 kmsqptr->u.msg_qnum); 359 360 if (option & BIGGEST) 361 printf(" %20lu", kmsqptr->u.msg_qbytes); 362 363 if (option & PID) 364 printf(" %12d %12d", 365 kmsqptr->u.msg_lspid, 366 kmsqptr->u.msg_lrpid); 367 368 if (option & TIME) 369 printf(" %s %s %s", 370 stime_buf, 371 rtime_buf, 372 ctime_buf); 373 374 printf("\n"); 375} 376 377void 378print_kshmtotal(struct shminfo shminfo) 379{ 380 381 printf("shminfo:\n"); 382 printf("\tshmmax: %12lu\t(max shared memory segment size)\n", 383 shminfo.shmmax); 384 printf("\tshmmin: %12lu\t(min shared memory segment size)\n", 385 shminfo.shmmin); 386 printf("\tshmmni: %12lu\t(max number of shared memory identifiers)\n", 387 shminfo.shmmni); 388 printf("\tshmseg: %12lu\t(max shared memory segments per process)\n", 389 shminfo.shmseg); 390 printf("\tshmall: %12lu\t(max amount of shared memory in pages)\n\n", 391 shminfo.shmall); 392} 393 394void 395print_kshmheader(int option) 396{ 397 398 printf("Shared Memory:\n"); 399 printf("T %12s %12s %-11s %-8s %-8s", 400 "ID", "KEY", "MODE", "OWNER", "GROUP"); 401 if (option & CREATOR) 402 printf(" %-8s %-8s", "CREATOR", "CGROUP"); 403 if (option & OUTSTANDING) 404 printf(" %12s", "NATTCH"); 405 if (option & BIGGEST) 406 printf(" %12s", "SEGSZ"); 407 if (option & PID) 408 printf(" %12s %12s", "CPID", "LPID"); 409 if (option & TIME) 410 printf(" %-8s %-8s %-8s", "ATIME", "DTIME", "CTIME"); 411 printf("\n"); 412} 413 414void 415print_kshmptr(int i, int option, struct shmid_kernel *kshmptr) 416{ 417 char atime_buf[100], dtime_buf[100], ctime_buf[100]; 418 419 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 %12d %12d %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(" %12d", 437 kshmptr->u.shm_nattch); 438 439 if (option & BIGGEST) 440 printf(" %12zu", 441 kshmptr->u.shm_segsz); 442 443 if (option & PID) 444 printf(" %12d %12d", 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 457void 458print_ksemtotal(struct seminfo seminfo) 459{ 460 461 printf("seminfo:\n"); 462 printf("\tsemmni: %12d\t(# of semaphore identifiers)\n", 463 seminfo.semmni); 464 printf("\tsemmns: %12d\t(# of semaphores in system)\n", 465 seminfo.semmns); 466 printf("\tsemmnu: %12d\t(# of undo structures in system)\n", 467 seminfo.semmnu); 468 printf("\tsemmsl: %12d\t(max # of semaphores per id)\n", 469 seminfo.semmsl); 470 printf("\tsemopm: %12d\t(max # of operations per semop call)\n", 471 seminfo.semopm); 472 printf("\tsemume: %12d\t(max # of undo entries per process)\n", 473 seminfo.semume); 474 printf("\tsemusz: %12d\t(size in bytes of undo structure)\n", 475 seminfo.semusz); 476 printf("\tsemvmx: %12d\t(semaphore maximum value)\n", 477 seminfo.semvmx); 478 printf("\tsemaem: %12d\t(adjust on exit max value)\n\n", 479 seminfo.semaem); 480} 481 482void 483print_ksemheader(int option) 484{ 485 486 printf("Semaphores:\n"); 487 printf("T %12s %12s %-11s %-8s %-8s", 488 "ID", "KEY", "MODE", "OWNER", "GROUP"); 489 if (option & CREATOR) 490 printf(" %-8s %-8s", "CREATOR", "CGROUP"); 491 if (option & BIGGEST) 492 printf(" %12s", "NSEMS"); 493 if (option & TIME) 494 printf(" %-8s %-8s", "OTIME", "CTIME"); 495 printf("\n"); 496} 497 498void 499print_ksemptr(int i, int option, struct semid_kernel *ksemaptr) 500{ 501 char ctime_buf[100], otime_buf[100]; 502 503 cvt_time(ksemaptr->u.sem_otime, otime_buf); 504 cvt_time(ksemaptr->u.sem_ctime, ctime_buf); 505 506 printf("s %12d %12d %s %-8s %-8s", 507 IXSEQ_TO_IPCID(i, ksemaptr->u.sem_perm), 508 (int)ksemaptr->u.sem_perm.key, 509 fmt_perm(ksemaptr->u.sem_perm.mode), 510 user_from_uid(ksemaptr->u.sem_perm.uid, 0), 511 group_from_gid(ksemaptr->u.sem_perm.gid, 0)); 512 513 if (option & CREATOR) 514 printf(" %-8s %-8s", 515 user_from_uid(ksemaptr->u.sem_perm.cuid, 0), 516 group_from_gid(ksemaptr->u.sem_perm.cgid, 0)); 517 518 if (option & BIGGEST) 519 printf(" %12d", 520 ksemaptr->u.sem_nsems); 521 522 if (option & TIME) 523 printf(" %s %s", 524 otime_buf, 525 ctime_buf); 526 527 printf("\n"); 528} 529 530uid_t 531user2uid(char *username) 532{ 533 struct passwd *pwd; 534 uid_t uid; 535 char *r; 536 537 uid = strtoul(username, &r, 0); 538 if (!*r && r != username) 539 return (uid); 540 if ((pwd = getpwnam(username)) == NULL) 541 errx(1, "getpwnam failed: No such user"); 542 endpwent(); 543 return (pwd->pw_uid); 544} 545 546void 547usage(void) 548{ 549 550 fprintf(stderr, 551 "usage: " 552 "ipcs [-abcmopqstyMQST] [-C corefile] [-N namelist] [-u user]\n"); 553 exit(1); 554} 555