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 * $FreeBSD: src/usr.bin/ipcs/ipcs.c,v 1.12.2.4 2003/04/08 11:01:34 tjr Exp $ 28 * $DragonFly: src/usr.bin/ipcs/ipcs.c,v 1.5 2003/11/21 22:46:14 dillon Exp $ 29 */ 30 31 #define _KERNEL_STRUCTURES 32 33 #include <err.h> 34 #include <fcntl.h> 35 #include <kvm.h> 36 #include <nlist.h> 37 #include <paths.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 43 #include <sys/types.h> 44 #include <sys/param.h> 45 #include <sys/time.h> 46 #include <sys/ipc.h> 47 #include <sys/sem.h> 48 #include <sys/shm.h> 49 #include <sys/msg.h> 50 51 struct semid_ds *sema; 52 struct seminfo seminfo; 53 struct msginfo msginfo; 54 struct msqid_ds *msqids; 55 struct shminfo shminfo; 56 struct shmid_ds *shmsegs; 57 58 void usage(void); 59 60 static struct nlist symbols[] = { 61 {"_sema"}, 62 #define X_SEMA 0 63 {"_seminfo"}, 64 #define X_SEMINFO 1 65 {"_semu"}, 66 #define X_SEMU 2 67 {"_msginfo"}, 68 #define X_MSGINFO 3 69 {"_msqids"}, 70 #define X_MSQIDS 4 71 {"_shminfo"}, 72 #define X_SHMINFO 5 73 {"_shmsegs"}, 74 #define X_SHMSEGS 6 75 {NULL} 76 }; 77 78 static kvm_t *kd; 79 80 char * 81 fmt_perm(u_short mode) 82 { 83 static char buffer[100]; 84 85 buffer[0] = '-'; 86 buffer[1] = '-'; 87 buffer[2] = ((mode & 0400) ? 'r' : '-'); 88 buffer[3] = ((mode & 0200) ? 'w' : '-'); 89 buffer[4] = ((mode & 0100) ? 'a' : '-'); 90 buffer[5] = ((mode & 0040) ? 'r' : '-'); 91 buffer[6] = ((mode & 0020) ? 'w' : '-'); 92 buffer[7] = ((mode & 0010) ? 'a' : '-'); 93 buffer[8] = ((mode & 0004) ? 'r' : '-'); 94 buffer[9] = ((mode & 0002) ? 'w' : '-'); 95 buffer[10] = ((mode & 0001) ? 'a' : '-'); 96 buffer[11] = '\0'; 97 return (&buffer[0]); 98 } 99 100 void 101 cvt_time(time_t t, char *buf) 102 { 103 struct tm *tm; 104 105 if (t == 0) { 106 strcpy(buf, "no-entry"); 107 } else { 108 tm = localtime(&t); 109 sprintf(buf, "%2d:%02d:%02d", 110 tm->tm_hour, tm->tm_min, tm->tm_sec); 111 } 112 } 113 #define SHMINFO 1 114 #define SHMTOTAL 2 115 #define MSGINFO 4 116 #define MSGTOTAL 8 117 #define SEMINFO 16 118 #define SEMTOTAL 32 119 120 #define BIGGEST 1 121 #define CREATOR 2 122 #define OUTSTANDING 4 123 #define PID 8 124 #define TIME 16 125 126 int 127 main(int argc, char **argv) 128 { 129 int display = SHMINFO | MSGINFO | SEMINFO; 130 int option = 0; 131 char *core = NULL, *namelist = NULL; 132 int i; 133 134 while ((i = getopt(argc, argv, "MmQqSsabC:cN:optT")) != -1) 135 switch (i) { 136 case 'M': 137 display = SHMTOTAL; 138 break; 139 case 'm': 140 display = SHMINFO; 141 break; 142 case 'Q': 143 display = MSGTOTAL; 144 break; 145 case 'q': 146 display = MSGINFO; 147 break; 148 case 'S': 149 display = SEMTOTAL; 150 break; 151 case 's': 152 display = SEMINFO; 153 break; 154 case 'T': 155 display = SHMTOTAL | MSGTOTAL | SEMTOTAL; 156 break; 157 case 'a': 158 option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME; 159 break; 160 case 'b': 161 option |= BIGGEST; 162 break; 163 case 'C': 164 core = optarg; 165 break; 166 case 'c': 167 option |= CREATOR; 168 break; 169 case 'N': 170 namelist = optarg; 171 break; 172 case 'o': 173 option |= OUTSTANDING; 174 break; 175 case 'p': 176 option |= PID; 177 break; 178 case 't': 179 option |= TIME; 180 break; 181 default: 182 usage(); 183 } 184 185 /* 186 * Discard setgid privileges if not the running kernel so that bad 187 * guys can't print interesting stuff from kernel memory. 188 */ 189 if (namelist != NULL || core != NULL) 190 setgid(getgid()); 191 192 if ((kd = kvm_open(namelist, core, NULL, O_RDONLY, "ipcs")) == NULL) 193 exit(1); 194 195 switch (kvm_nlist(kd, symbols)) { 196 case 0: 197 break; 198 case -1: 199 errx(1, "unable to read kernel symbol table"); 200 default: 201 #ifdef notdef /* they'll be told more civilly later */ 202 warnx("nlist failed"); 203 for (i = 0; symbols[i].n_name != NULL; i++) 204 if (symbols[i].n_value == 0) 205 warnx("symbol %s not found", 206 symbols[i].n_name); 207 break; 208 #endif 209 } 210 211 if ((display & (MSGINFO | MSGTOTAL)) && 212 kvm_read(kd, symbols[X_MSGINFO].n_value, &msginfo, sizeof(msginfo))== sizeof(msginfo)) { 213 214 if (display & MSGTOTAL) { 215 printf("msginfo:\n"); 216 printf("\tmsgmax: %6d\t(max characters in a message)\n", 217 msginfo.msgmax); 218 printf("\tmsgmni: %6d\t(# of message queues)\n", 219 msginfo.msgmni); 220 printf("\tmsgmnb: %6d\t(max characters in a message queue)\n", 221 msginfo.msgmnb); 222 printf("\tmsgtql: %6d\t(max # of messages in system)\n", 223 msginfo.msgtql); 224 printf("\tmsgssz: %6d\t(size of a message segment)\n", 225 msginfo.msgssz); 226 printf("\tmsgseg: %6d\t(# of message segments in system)\n\n", 227 msginfo.msgseg); 228 } 229 if (display & MSGINFO) { 230 struct msqid_ds *xmsqids; 231 232 kvm_read(kd, symbols[X_MSQIDS].n_value, &msqids, sizeof(msqids)); 233 xmsqids = malloc(sizeof(struct msqid_ds) * msginfo.msgmni); 234 kvm_read(kd, (u_long) msqids, xmsqids, sizeof(struct msqid_ds) * msginfo.msgmni); 235 236 printf("Message Queues:\n"); 237 printf("T ID KEY MODE OWNER GROUP"); 238 if (option & CREATOR) 239 printf(" CREATOR CGROUP"); 240 if (option & OUTSTANDING) 241 printf(" CBYTES QNUM"); 242 if (option & BIGGEST) 243 printf(" QBYTES"); 244 if (option & PID) 245 printf(" LSPID LRPID"); 246 if (option & TIME) 247 printf(" STIME RTIME CTIME"); 248 printf("\n"); 249 for (i = 0; i < msginfo.msgmni; i += 1) { 250 if (xmsqids[i].msg_qbytes != 0) { 251 char stime_buf[100], rtime_buf[100], 252 ctime_buf[100]; 253 struct msqid_ds *msqptr = &xmsqids[i]; 254 255 cvt_time(msqptr->msg_stime, stime_buf); 256 cvt_time(msqptr->msg_rtime, rtime_buf); 257 cvt_time(msqptr->msg_ctime, ctime_buf); 258 259 printf("q %6d %10d %s %8s %8s", 260 IXSEQ_TO_IPCID(i, msqptr->msg_perm), 261 msqptr->msg_perm.key, 262 fmt_perm(msqptr->msg_perm.mode), 263 user_from_uid(msqptr->msg_perm.uid, 0), 264 group_from_gid(msqptr->msg_perm.gid, 0)); 265 266 if (option & CREATOR) 267 printf(" %8s %8s", 268 user_from_uid(msqptr->msg_perm.cuid, 0), 269 group_from_gid(msqptr->msg_perm.cgid, 0)); 270 271 if (option & OUTSTANDING) 272 printf(" %6d %6d", 273 msqptr->msg_cbytes, 274 msqptr->msg_qnum); 275 276 if (option & BIGGEST) 277 printf(" %6d", 278 msqptr->msg_qbytes); 279 280 if (option & PID) 281 printf(" %6d %6d", 282 msqptr->msg_lspid, 283 msqptr->msg_lrpid); 284 285 if (option & TIME) 286 printf("%s %s %s", 287 stime_buf, 288 rtime_buf, 289 ctime_buf); 290 291 printf("\n"); 292 } 293 } 294 printf("\n"); 295 } 296 } else 297 if (display & (MSGINFO | MSGTOTAL)) { 298 fprintf(stderr, 299 "SVID messages facility not configured in the system\n"); 300 } 301 if ((display & (SHMINFO | SHMTOTAL)) && 302 kvm_read(kd, symbols[X_SHMINFO].n_value, &shminfo, sizeof(shminfo))) { 303 if (display & SHMTOTAL) { 304 printf("shminfo:\n"); 305 printf("\tshmmax: %7d\t(max shared memory segment size)\n", 306 shminfo.shmmax); 307 printf("\tshmmin: %7d\t(min shared memory segment size)\n", 308 shminfo.shmmin); 309 printf("\tshmmni: %7d\t(max number of shared memory identifiers)\n", 310 shminfo.shmmni); 311 printf("\tshmseg: %7d\t(max shared memory segments per process)\n", 312 shminfo.shmseg); 313 printf("\tshmall: %7d\t(max amount of shared memory in pages)\n\n", 314 shminfo.shmall); 315 } 316 if (display & SHMINFO) { 317 struct shmid_ds *xshmids; 318 319 kvm_read(kd, symbols[X_SHMSEGS].n_value, &shmsegs, sizeof(shmsegs)); 320 xshmids = malloc(sizeof(struct shmid_ds) * shminfo.shmmni); 321 kvm_read(kd, (u_long) shmsegs, xshmids, sizeof(struct shmid_ds) * 322 shminfo.shmmni); 323 324 printf("Shared Memory:\n"); 325 printf("T ID KEY MODE OWNER GROUP"); 326 if (option & CREATOR) 327 printf(" CREATOR CGROUP"); 328 if (option & OUTSTANDING) 329 printf(" NATTCH"); 330 if (option & BIGGEST) 331 printf(" SEGSZ"); 332 if (option & PID) 333 printf(" CPID LPID"); 334 if (option & TIME) 335 printf(" ATIME DTIME CTIME"); 336 printf("\n"); 337 for (i = 0; i < shminfo.shmmni; i += 1) { 338 if (xshmids[i].shm_perm.mode & 0x0800) { 339 char atime_buf[100], dtime_buf[100], 340 ctime_buf[100]; 341 struct shmid_ds *shmptr = &xshmids[i]; 342 343 cvt_time(shmptr->shm_atime, atime_buf); 344 cvt_time(shmptr->shm_dtime, dtime_buf); 345 cvt_time(shmptr->shm_ctime, ctime_buf); 346 347 printf("m %6d %10d %s %8s %8s", 348 IXSEQ_TO_IPCID(i, shmptr->shm_perm), 349 shmptr->shm_perm.key, 350 fmt_perm(shmptr->shm_perm.mode), 351 user_from_uid(shmptr->shm_perm.uid, 0), 352 group_from_gid(shmptr->shm_perm.gid, 0)); 353 354 if (option & CREATOR) 355 printf(" %8s %8s", 356 user_from_uid(shmptr->shm_perm.cuid, 0), 357 group_from_gid(shmptr->shm_perm.cgid, 0)); 358 359 if (option & OUTSTANDING) 360 printf(" %6d", 361 shmptr->shm_nattch); 362 363 if (option & BIGGEST) 364 printf(" %6d", 365 shmptr->shm_segsz); 366 367 if (option & PID) 368 printf(" %6d %6d", 369 shmptr->shm_cpid, 370 shmptr->shm_lpid); 371 372 if (option & TIME) 373 printf("%s %s %s", 374 atime_buf, 375 dtime_buf, 376 ctime_buf); 377 378 printf("\n"); 379 } 380 } 381 printf("\n"); 382 } 383 } else 384 if (display & (SHMINFO | SHMTOTAL)) { 385 fprintf(stderr, 386 "SVID shared memory facility not configured in the system\n"); 387 } 388 if ((display & (SEMINFO | SEMTOTAL)) && 389 kvm_read(kd, symbols[X_SEMINFO].n_value, &seminfo, sizeof(seminfo))) { 390 struct semid_ds *xsema; 391 392 if (display & SEMTOTAL) { 393 printf("seminfo:\n"); 394 printf("\tsemmap: %6d\t(# of entries in semaphore map)\n", 395 seminfo.semmap); 396 printf("\tsemmni: %6d\t(# of semaphore identifiers)\n", 397 seminfo.semmni); 398 printf("\tsemmns: %6d\t(# of semaphores in system)\n", 399 seminfo.semmns); 400 printf("\tsemmnu: %6d\t(# of undo structures in system)\n", 401 seminfo.semmnu); 402 printf("\tsemmsl: %6d\t(max # of semaphores per id)\n", 403 seminfo.semmsl); 404 printf("\tsemopm: %6d\t(max # of operations per semop call)\n", 405 seminfo.semopm); 406 printf("\tsemume: %6d\t(max # of undo entries per process)\n", 407 seminfo.semume); 408 printf("\tsemusz: %6d\t(size in bytes of undo structure)\n", 409 seminfo.semusz); 410 printf("\tsemvmx: %6d\t(semaphore maximum value)\n", 411 seminfo.semvmx); 412 printf("\tsemaem: %6d\t(adjust on exit max value)\n\n", 413 seminfo.semaem); 414 } 415 if (display & SEMINFO) { 416 kvm_read(kd, symbols[X_SEMA].n_value, &sema, sizeof(sema)); 417 xsema = malloc(sizeof(struct semid_ds) * seminfo.semmni); 418 kvm_read(kd, (u_long) sema, xsema, sizeof(struct semid_ds) * seminfo.semmni); 419 420 printf("Semaphores:\n"); 421 printf("T ID KEY MODE OWNER GROUP"); 422 if (option & CREATOR) 423 printf(" CREATOR CGROUP"); 424 if (option & BIGGEST) 425 printf(" NSEMS"); 426 if (option & TIME) 427 printf(" OTIME CTIME"); 428 printf("\n"); 429 for (i = 0; i < seminfo.semmni; i += 1) { 430 if ((xsema[i].sem_perm.mode & SEM_ALLOC) != 0) { 431 char ctime_buf[100], otime_buf[100]; 432 struct semid_ds *semaptr = &xsema[i]; 433 434 cvt_time(semaptr->sem_otime, otime_buf); 435 cvt_time(semaptr->sem_ctime, ctime_buf); 436 437 printf("s %6d %10d %s %8s %8s", 438 IXSEQ_TO_IPCID(i, semaptr->sem_perm), 439 semaptr->sem_perm.key, 440 fmt_perm(semaptr->sem_perm.mode), 441 user_from_uid(semaptr->sem_perm.uid, 0), 442 group_from_gid(semaptr->sem_perm.gid, 0)); 443 444 if (option & CREATOR) 445 printf(" %8s %8s", 446 user_from_uid(semaptr->sem_perm.cuid, 0), 447 group_from_gid(semaptr->sem_perm.cgid, 0)); 448 449 if (option & BIGGEST) 450 printf(" %6d", 451 semaptr->sem_nsems); 452 453 if (option & TIME) 454 printf("%s %s", 455 otime_buf, 456 ctime_buf); 457 458 printf("\n"); 459 } 460 } 461 462 printf("\n"); 463 } 464 } else 465 if (display & (SEMINFO | SEMTOTAL)) { 466 fprintf(stderr, "SVID semaphores facility not configured in the system\n"); 467 } 468 kvm_close(kd); 469 470 exit(0); 471 } 472 473 void 474 usage(void) 475 { 476 477 fprintf(stderr, 478 "usage: ipcs [-abcmopqstMQST] [-C corefile] [-N namelist]\n"); 479 exit(1); 480 } 481