usr.bin/ipcs/ipcs.c

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