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 * $Id: ipcs.c,v 1.5 1996/05/30 02:18:44 pst Exp $ 28 */ 29 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <unistd.h> 33 #include <fcntl.h> 34 #include <paths.h> 35 #include <nlist.h> 36 #include <kvm.h> 37 #include <err.h> 38 39 #include <sys/types.h> 40 #include <sys/param.h> 41 #include <sys/time.h> 42 #include <sys/proc.h> 43 #define KERNEL 44 #include <sys/ipc.h> 45 #include <sys/sem.h> 46 #include <sys/shm.h> 47 #include <sys/msg.h> 48 49 struct semid_ds *sema; 50 struct seminfo seminfo; 51 struct msginfo msginfo; 52 struct msqid_ds *msqids; 53 struct shminfo shminfo; 54 struct shmid_ds *shmsegs; 55 56 int semconfig __P((int,...)); 57 void usage __P((void)); 58 59 static struct nlist symbols[] = { 60 {"_sema"}, 61 #define X_SEMA 0 62 {"_seminfo"}, 63 #define X_SEMINFO 1 64 {"_semu"}, 65 #define X_SEMU 2 66 {"_msginfo"}, 67 #define X_MSGINFO 3 68 {"_msqids"}, 69 #define X_MSQIDS 4 70 {"_shminfo"}, 71 #define X_SHMINFO 5 72 {"_shmsegs"}, 73 #define X_SHMSEGS 6 74 {NULL} 75 }; 76 77 static kvm_t *kd; 78 79 char * 80 fmt_perm(mode) 81 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(t, buf) 102 time_t t; 103 char *buf; 104 { 105 struct tm *tm; 106 107 if (t == 0) { 108 strcpy(buf, "no-entry"); 109 } else { 110 tm = localtime(&t); 111 sprintf(buf, "%2d:%02d:%02d", 112 tm->tm_hour, tm->tm_min, tm->tm_sec); 113 } 114 } 115 #define SHMINFO 1 116 #define SHMTOTAL 2 117 #define MSGINFO 4 118 #define MSGTOTAL 8 119 #define SEMINFO 16 120 #define SEMTOTAL 32 121 122 #define BIGGEST 1 123 #define CREATOR 2 124 #define OUTSTANDING 4 125 #define PID 8 126 #define TIME 16 127 128 int 129 main(argc, argv) 130 int argc; 131 char *argv[]; 132 { 133 int display = SHMINFO | MSGINFO | SEMINFO; 134 int option = 0; 135 char *core = NULL, *namelist = NULL; 136 int i; 137 138 while ((i = getopt(argc, argv, "MmQqSsabC:cN:optT")) != EOF) 139 switch (i) { 140 case 'M': 141 display = SHMTOTAL; 142 break; 143 case 'm': 144 display = SHMINFO; 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 'a': 162 option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME; 163 break; 164 case 'b': 165 option |= BIGGEST; 166 break; 167 case 'C': 168 core = optarg; 169 break; 170 case 'c': 171 option |= CREATOR; 172 break; 173 case 'N': 174 namelist = optarg; 175 break; 176 case 'o': 177 option |= OUTSTANDING; 178 break; 179 case 'p': 180 option |= PID; 181 break; 182 case 't': 183 option |= TIME; 184 break; 185 default: 186 usage(); 187 } 188 189 /* 190 * Discard setgid privileges if not the running kernel so that bad 191 * guys can't print interesting stuff from kernel memory. 192 */ 193 if (namelist != NULL || core != NULL) 194 setgid(getgid()); 195 196 if ((kd = kvm_open(namelist, core, NULL, O_RDONLY, "ipcs")) == NULL) 197 exit(1); 198 199 switch (kvm_nlist(kd, symbols)) { 200 case 0: 201 break; 202 case -1: 203 errx(1, "unable to read kernel symbol table."); 204 default: 205 #ifdef notdef /* they'll be told more civilly later */ 206 warnx("nlist failed"); 207 for (i = 0; symbols[i].n_name != NULL; i++) 208 if (symbols[i].n_value == 0) 209 warnx("symbol %s not found", 210 symbols[i].n_name); 211 break; 212 #endif 213 } 214 215 if ((display & (MSGINFO | MSGTOTAL)) && 216 kvm_read(kd, symbols[X_MSGINFO].n_value, &msginfo, sizeof(msginfo))) { 217 218 if (display & MSGTOTAL) { 219 printf("msginfo:\n"); 220 printf("\tmsgmax: %6d\t(max characters in a message)\n", 221 msginfo.msgmax); 222 printf("\tmsgmni: %6d\t(# of message queues)\n", 223 msginfo.msgmni); 224 printf("\tmsgmnb: %6d\t(max characters in a message queue)\n", 225 msginfo.msgmnb); 226 printf("\tmsgtql: %6d\t(max # of messages in system)\n", 227 msginfo.msgtql); 228 printf("\tmsgssz: %6d\t(size of a message segment)\n", 229 msginfo.msgssz); 230 printf("\tmsgseg: %6d\t(# of message segments in system)\n\n", 231 msginfo.msgseg); 232 } 233 if (display & MSGINFO) { 234 struct msqid_ds *xmsqids; 235 236 kvm_read(kd, symbols[X_MSQIDS].n_value, &msqids, sizeof(msqids)); 237 xmsqids = malloc(sizeof(struct msqid_ds) * msginfo.msgmni); 238 kvm_read(kd, (u_long) msqids, xmsqids, sizeof(struct msqid_ds) * msginfo.msgmni); 239 240 printf("Message Queues:\n"); 241 printf("T ID KEY MODE OWNER GROUP"); 242 if (option & CREATOR) 243 printf(" CREATOR CGROUP"); 244 if (option & OUTSTANDING) 245 printf(" CBYTES QNUM"); 246 if (option & BIGGEST) 247 printf(" QBYTES"); 248 if (option & PID) 249 printf(" LSPID LRPID"); 250 if (option & TIME) 251 printf(" STIME RTIME CTIME"); 252 printf("\n"); 253 for (i = 0; i < msginfo.msgmni; i += 1) { 254 if (xmsqids[i].msg_qbytes != 0) { 255 char stime_buf[100], rtime_buf[100], 256 ctime_buf[100]; 257 struct msqid_ds *msqptr = &xmsqids[i]; 258 259 cvt_time(msqptr->msg_stime, stime_buf); 260 cvt_time(msqptr->msg_rtime, rtime_buf); 261 cvt_time(msqptr->msg_ctime, ctime_buf); 262 263 printf("q %6d %10d %s %8s %8s", 264 IXSEQ_TO_IPCID(i, msqptr->msg_perm), 265 msqptr->msg_perm.key, 266 fmt_perm(msqptr->msg_perm.mode), 267 user_from_uid(msqptr->msg_perm.uid, 0), 268 group_from_gid(msqptr->msg_perm.gid, 0)); 269 270 if (option & CREATOR) 271 printf(" %8s %8s", 272 user_from_uid(msqptr->msg_perm.cuid, 0), 273 group_from_gid(msqptr->msg_perm.cgid, 0)); 274 275 if (option & OUTSTANDING) 276 printf(" %6d %6d", 277 msqptr->msg_cbytes, 278 msqptr->msg_qnum); 279 280 if (option & BIGGEST) 281 printf(" %6d", 282 msqptr->msg_qbytes); 283 284 if (option & PID) 285 printf(" %6d %6d", 286 msqptr->msg_lspid, 287 msqptr->msg_lrpid); 288 289 if (option & TIME) 290 printf("%s %s %s", 291 stime_buf, 292 rtime_buf, 293 ctime_buf); 294 295 printf("\n"); 296 } 297 } 298 printf("\n"); 299 } 300 } else 301 if (display & (MSGINFO | MSGTOTAL)) { 302 fprintf(stderr, 303 "SVID messages facility not configured in the system\n"); 304 } 305 if ((display & (SHMINFO | SHMTOTAL)) && 306 kvm_read(kd, symbols[X_SHMINFO].n_value, &shminfo, sizeof(shminfo))) { 307 if (display & SHMTOTAL) { 308 printf("shminfo:\n"); 309 printf("\tshmmax: %7d\t(max shared memory segment size)\n", 310 shminfo.shmmax); 311 printf("\tshmmin: %7d\t(min shared memory segment size)\n", 312 shminfo.shmmin); 313 printf("\tshmmni: %7d\t(max number of shared memory identifiers)\n", 314 shminfo.shmmni); 315 printf("\tshmseg: %7d\t(max shared memory segments per process)\n", 316 shminfo.shmseg); 317 printf("\tshmall: %7d\t(max amount of shared memory in pages)\n\n", 318 shminfo.shmall); 319 } 320 if (display & SHMINFO) { 321 struct shmid_ds *xshmids; 322 323 kvm_read(kd, symbols[X_SHMSEGS].n_value, &shmsegs, sizeof(shmsegs)); 324 xshmids = malloc(sizeof(struct shmid_ds) * shminfo.shmmni); 325 kvm_read(kd, (u_long) shmsegs, xshmids, sizeof(struct shmid_ds) * 326 shminfo.shmmni); 327 328 printf("Shared Memory:\n"); 329 printf("T ID KEY MODE OWNER GROUP"); 330 if (option & CREATOR) 331 printf(" CREATOR CGROUP"); 332 if (option & OUTSTANDING) 333 printf(" NATTCH"); 334 if (option & BIGGEST) 335 printf(" SEGSZ"); 336 if (option & PID) 337 printf(" CPID LPID"); 338 if (option & TIME) 339 printf(" ATIME DTIME CTIME"); 340 printf("\n"); 341 for (i = 0; i < shminfo.shmmni; i += 1) { 342 if (xshmids[i].shm_perm.mode & 0x0800) { 343 char atime_buf[100], dtime_buf[100], 344 ctime_buf[100]; 345 struct shmid_ds *shmptr = &xshmids[i]; 346 347 cvt_time(shmptr->shm_atime, atime_buf); 348 cvt_time(shmptr->shm_dtime, dtime_buf); 349 cvt_time(shmptr->shm_ctime, ctime_buf); 350 351 printf("m %6d %10d %s %8s %8s", 352 IXSEQ_TO_IPCID(i, shmptr->shm_perm), 353 shmptr->shm_perm.key, 354 fmt_perm(shmptr->shm_perm.mode), 355 user_from_uid(shmptr->shm_perm.uid, 0), 356 group_from_gid(shmptr->shm_perm.gid, 0)); 357 358 if (option & CREATOR) 359 printf(" %8s %8s", 360 user_from_uid(shmptr->shm_perm.cuid, 0), 361 group_from_gid(shmptr->shm_perm.cgid, 0)); 362 363 if (option & OUTSTANDING) 364 printf(" %6d", 365 shmptr->shm_nattch); 366 367 if (option & BIGGEST) 368 printf(" %6d", 369 shmptr->shm_segsz); 370 371 if (option & PID) 372 printf(" %6d %6d", 373 shmptr->shm_cpid, 374 shmptr->shm_lpid); 375 376 if (option & TIME) 377 printf("%s %s %s", 378 atime_buf, 379 dtime_buf, 380 ctime_buf); 381 382 printf("\n"); 383 } 384 } 385 printf("\n"); 386 } 387 } else 388 if (display & (SHMINFO | SHMTOTAL)) { 389 fprintf(stderr, 390 "SVID shared memory facility not configured in the system\n"); 391 } 392 if ((display & (SEMINFO | SEMTOTAL)) && 393 kvm_read(kd, symbols[X_SEMINFO].n_value, &seminfo, sizeof(seminfo))) { 394 struct semid_ds *xsema; 395 396 if (display & SEMTOTAL) { 397 printf("seminfo:\n"); 398 printf("\tsemmap: %6d\t(# of entries in semaphore map)\n", 399 seminfo.semmap); 400 printf("\tsemmni: %6d\t(# of semaphore identifiers)\n", 401 seminfo.semmni); 402 printf("\tsemmns: %6d\t(# of semaphores in system)\n", 403 seminfo.semmns); 404 printf("\tsemmnu: %6d\t(# of undo structures in system)\n", 405 seminfo.semmnu); 406 printf("\tsemmsl: %6d\t(max # of semaphores per id)\n", 407 seminfo.semmsl); 408 printf("\tsemopm: %6d\t(max # of operations per semop call)\n", 409 seminfo.semopm); 410 printf("\tsemume: %6d\t(max # of undo entries per process)\n", 411 seminfo.semume); 412 printf("\tsemusz: %6d\t(size in bytes of undo structure)\n", 413 seminfo.semusz); 414 printf("\tsemvmx: %6d\t(semaphore maximum value)\n", 415 seminfo.semvmx); 416 printf("\tsemaem: %6d\t(adjust on exit max value)\n\n", 417 seminfo.semaem); 418 } 419 if (display & SEMINFO) { 420 if (semconfig(SEM_CONFIG_FREEZE) != 0) { 421 perror("semconfig"); 422 fprintf(stderr, 423 "Can't lock semaphore facility - winging it...\n"); 424 } 425 kvm_read(kd, symbols[X_SEMA].n_value, &sema, sizeof(sema)); 426 xsema = malloc(sizeof(struct semid_ds) * seminfo.semmni); 427 kvm_read(kd, (u_long) sema, xsema, sizeof(struct semid_ds) * seminfo.semmni); 428 429 printf("Semaphores:\n"); 430 printf("T ID KEY MODE OWNER GROUP"); 431 if (option & CREATOR) 432 printf(" CREATOR CGROUP"); 433 if (option & BIGGEST) 434 printf(" NSEMS"); 435 if (option & TIME) 436 printf(" OTIME CTIME"); 437 printf("\n"); 438 for (i = 0; i < seminfo.semmni; i += 1) { 439 if ((xsema[i].sem_perm.mode & SEM_ALLOC) != 0) { 440 char ctime_buf[100], otime_buf[100]; 441 struct semid_ds *semaptr = &xsema[i]; 442 int j, value; 443 union semun junk; 444 445 cvt_time(semaptr->sem_otime, otime_buf); 446 cvt_time(semaptr->sem_ctime, ctime_buf); 447 448 printf("s %6d %10d %s %8s %8s", 449 IXSEQ_TO_IPCID(i, semaptr->sem_perm), 450 semaptr->sem_perm.key, 451 fmt_perm(semaptr->sem_perm.mode), 452 user_from_uid(semaptr->sem_perm.uid, 0), 453 group_from_gid(semaptr->sem_perm.gid, 0)); 454 455 if (option & CREATOR) 456 printf(" %8s %8s", 457 user_from_uid(semaptr->sem_perm.cuid, 0), 458 group_from_gid(semaptr->sem_perm.cgid, 0)); 459 460 if (option & BIGGEST) 461 printf(" %6d", 462 semaptr->sem_nsems); 463 464 if (option & TIME) 465 printf("%s %s", 466 otime_buf, 467 ctime_buf); 468 469 printf("\n"); 470 } 471 } 472 473 (void) semconfig(SEM_CONFIG_THAW); 474 475 printf("\n"); 476 } 477 } else 478 if (display & (SEMINFO | SEMTOTAL)) { 479 fprintf(stderr, "SVID semaphores facility not configured in the system\n"); 480 } 481 kvm_close(kd); 482 483 exit(0); 484 } 485 486 void 487 usage() 488 { 489 490 fprintf(stderr, 491 "usage: ipcs [-abcmopqst] [-C corefile] [-N namelist]\n"); 492 exit(1); 493 } 494