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