usr.bin/ipcs/ipcs.c

   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("$FreeBSD$");
  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
  52 char   *fmt_perm(u_short);
  53 void    cvt_time(time_t, char *);
  54 void    usage(void);
  55 uid_t   user2uid(char *username);
  56
  57 void    print_kmsqtotal(struct msginfo msginfo);
  58 void    print_kmsqheader(int option);
  59 void    print_kmsqptr(int i, int option, struct msqid_kernel *kmsqptr);
  60 void    print_kshmtotal(struct shminfo shminfo);
  61 void    print_kshmheader(int option);
  62 void    print_kshmptr(int i, int option, struct shmid_kernel *kshmptr);
  63 void    print_ksemtotal(struct seminfo seminfo);
  64 void    print_ksemheader(int option);
  65 void    print_ksemptr(int i, int option, struct semid_kernel *ksemaptr);
  66
  67 char   *
  68 fmt_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
  87 void
  88 cvt_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
 107 int
 108 main(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
 296 void
 297 print_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
 315 void 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
 334 void
 335 print_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
 377 void
 378 print_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
 394 void
 395 print_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
 414 void
 415 print_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
 457 void
 458 print_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
 482 void
 483 print_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
 498 void
 499 print_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
 530 uid_t
 531 user2uid(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
 546 void
 547 usage(void)
 548 {
 549
 550         fprintf(stderr,
 551             "usage: "
 552             "ipcs [-abcmopqstyMQST] [-C corefile] [-N namelist] [-u user]\n");
 553         exit(1);
 554 }