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         } else
 227                 if (display & (MSGINFO | MSGTOTAL)) {
 228                         fprintf(stderr,
 229                             "SVID messages facility "
 230                             "not configured in the system\n");
 231                 }
 232
 233         kget(X_SHMINFO, &shminfo, sizeof(shminfo));
 234         if ((display & (SHMINFO | SHMTOTAL))) {
 235
 236                 if (display & SHMTOTAL)
 237                         print_kshmtotal(shminfo);
 238
 239                 if (display & SHMINFO) {
 240                         struct shmid_kernel *kxshmids;
 241                         size_t kxshmids_len;
 242
 243                         kxshmids_len =
 244                             sizeof(struct shmid_kernel) * shminfo.shmmni;
 245                         kxshmids = malloc(kxshmids_len);
 246                         kget(X_SHMSEGS, kxshmids, kxshmids_len);
 247
 248                         print_kshmheader(option);
 249
 250                         for (i = 0; i < shminfo.shmmni; i += 1) {
 251                                 if (kxshmids[i].u.shm_perm.mode & 0x0800) {
 252                                         if (user &&
 253                                             uid != kxshmids[i].u.shm_perm.uid)
 254                                                 continue;
 255
 256                                         print_kshmptr(i, option, &kxshmids[i]);
 257                                 }
 258                         }
 259                         printf("\n");
 260                 }
 261         } else
 262                 if (display & (SHMINFO | SHMTOTAL)) {
 263                         fprintf(stderr,
 264                             "SVID shared memory facility "
 265                             "not configured in the system\n");
 266                 }
 267
 268         kget(X_SEMINFO, &seminfo, sizeof(seminfo));
 269         if ((display & (SEMINFO | SEMTOTAL))) {
 270                 struct semid_kernel *kxsema;
 271                 size_t kxsema_len;
 272
 273                 if (display & SEMTOTAL)
 274                         print_ksemtotal(seminfo);
 275
 276                 if (display & SEMINFO) {
 277                         kxsema_len =
 278                             sizeof(struct semid_kernel) * seminfo.semmni;
 279                         kxsema = malloc(kxsema_len);
 280                         kget(X_SEMA, kxsema, kxsema_len);
 281
 282                         print_ksemheader(option);
 283
 284                         for (i = 0; i < seminfo.semmni; i += 1) {
 285                                 if ((kxsema[i].u.sem_perm.mode & SEM_ALLOC)
 286                                     != 0) {
 287                                         if (user &&
 288                                             uid != kxsema[i].u.sem_perm.uid)
 289                                                 continue;
 290
 291                                         print_ksemptr(i, option, &kxsema[i]);
 292
 293                                 }
 294                         }
 295
 296                         printf("\n");
 297                 }
 298         } else
 299                 if (display & (SEMINFO | SEMTOTAL)) {
 300                         fprintf(stderr,
 301                             "SVID semaphores facility "
 302                             "not configured in the system\n");
 303                 }
 304
 305         if (!use_sysctl)
 306                 kvm_close(kd);
 307
 308         exit(0);
 309 }
 310
 311 void
 312 print_kmsqtotal(struct msginfo msginfo)
 313 {
 314
 315         printf("msginfo:\n");
 316         printf("\tmsgmax: %12d\t(max characters in a message)\n",
 317             msginfo.msgmax);
 318         printf("\tmsgmni: %12d\t(# of message queues)\n",
 319             msginfo.msgmni);
 320         printf("\tmsgmnb: %12d\t(max characters in a message queue)\n",
 321             msginfo.msgmnb);
 322         printf("\tmsgtql: %12d\t(max # of messages in system)\n",
 323             msginfo.msgtql);
 324         printf("\tmsgssz: %12d\t(size of a message segment)\n",
 325             msginfo.msgssz);
 326         printf("\tmsgseg: %12d\t(# of message segments in system)\n\n",
 327             msginfo.msgseg);
 328 }
 329
 330 void print_kmsqheader(int option)
 331 {
 332
 333         printf("Message Queues:\n");
 334         printf("T %12s %12s %-11s %-8s %-8s",
 335             "ID", "KEY", "MODE", "OWNER", "GROUP");
 336         if (option & CREATOR)
 337                 printf(" %-8s %-8s", "CREATOR", "CGROUP");
 338         if (option & OUTSTANDING)
 339                 printf(" %20s %20s", "CBYTES", "QNUM");
 340         if (option & BIGGEST)
 341                 printf(" %20s", "QBYTES");
 342         if (option & PID)
 343                 printf(" %12s %12s", "LSPID", "LRPID");
 344         if (option & TIME)
 345                 printf(" %-8s %-8s %-8s", "STIME", "RTIME", "CTIME");
 346         printf("\n");
 347 }
 348
 349 void
 350 print_kmsqptr(int i, int option, struct msqid_kernel *kmsqptr)
 351 {
 352         char    stime_buf[100], rtime_buf[100], ctime_buf[100];
 353
 354         cvt_time(kmsqptr->u.msg_stime, stime_buf);
 355         cvt_time(kmsqptr->u.msg_rtime, rtime_buf);
 356         cvt_time(kmsqptr->u.msg_ctime, ctime_buf);
 357
 358         printf("q %12d %12d %s %-8s %-8s",
 359             IXSEQ_TO_IPCID(i, kmsqptr->u.msg_perm),
 360             (int)kmsqptr->u.msg_perm.key,
 361             fmt_perm(kmsqptr->u.msg_perm.mode),
 362             user_from_uid(kmsqptr->u.msg_perm.uid, 0),
 363             group_from_gid(kmsqptr->u.msg_perm.gid, 0));
 364
 365         if (option & CREATOR)
 366                 printf(" %-8s %-8s",
 367                     user_from_uid(kmsqptr->u.msg_perm.cuid, 0),
 368                     group_from_gid(kmsqptr->u.msg_perm.cgid, 0));
 369
 370         if (option & OUTSTANDING)
 371                 printf(" %12lu %12lu",
 372                     kmsqptr->u.msg_cbytes,
 373                     kmsqptr->u.msg_qnum);
 374
 375         if (option & BIGGEST)
 376                 printf(" %20lu", kmsqptr->u.msg_qbytes);
 377
 378         if (option & PID)
 379                 printf(" %12d %12d",
 380                     kmsqptr->u.msg_lspid,
 381                     kmsqptr->u.msg_lrpid);
 382
 383         if (option & TIME)
 384                 printf(" %s %s %s",
 385                     stime_buf,
 386                     rtime_buf,
 387                     ctime_buf);
 388
 389         printf("\n");
 390 }
 391
 392 void
 393 print_kshmtotal(struct shminfo shminfo)
 394 {
 395
 396         printf("shminfo:\n");
 397         printf("\tshmmax: %12lu\t(max shared memory segment size)\n",
 398             shminfo.shmmax);
 399         printf("\tshmmin: %12lu\t(min shared memory segment size)\n",
 400             shminfo.shmmin);
 401         printf("\tshmmni: %12lu\t(max number of shared memory identifiers)\n",
 402             shminfo.shmmni);
 403         printf("\tshmseg: %12lu\t(max shared memory segments per process)\n",
 404             shminfo.shmseg);
 405         printf("\tshmall: %12lu\t(max amount of shared memory in pages)\n\n",
 406             shminfo.shmall);
 407 }
 408
 409 void
 410 print_kshmheader(int option)
 411 {
 412
 413         printf("Shared Memory:\n");
 414         printf("T %12s %12s %-11s %-8s %-8s",
 415             "ID", "KEY", "MODE", "OWNER", "GROUP");
 416         if (option & CREATOR)
 417                 printf(" %-8s %-8s", "CREATOR", "CGROUP");
 418         if (option & OUTSTANDING)
 419                 printf(" %12s", "NATTCH");
 420         if (option & BIGGEST)
 421                 printf(" %12s", "SEGSZ");
 422         if (option & PID)
 423                 printf(" %12s %12s", "CPID", "LPID");
 424         if (option & TIME)
 425                 printf(" %-8s %-8s %-8s", "ATIME", "DTIME", "CTIME");
 426         printf("\n");
 427 }
 428
 429 void
 430 print_kshmptr(int i, int option, struct shmid_kernel *kshmptr)
 431 {
 432         char    atime_buf[100], dtime_buf[100], ctime_buf[100];
 433
 434         cvt_time(kshmptr->u.shm_atime, atime_buf);
 435         cvt_time(kshmptr->u.shm_dtime, dtime_buf);
 436         cvt_time(kshmptr->u.shm_ctime, ctime_buf);
 437
 438         printf("m %12d %12d %s %-8s %-8s",
 439             IXSEQ_TO_IPCID(i, kshmptr->u.shm_perm),
 440             (int)kshmptr->u.shm_perm.key,
 441             fmt_perm(kshmptr->u.shm_perm.mode),
 442             user_from_uid(kshmptr->u.shm_perm.uid, 0),
 443             group_from_gid(kshmptr->u.shm_perm.gid, 0));
 444
 445         if (option & CREATOR)
 446                 printf(" %-8s %-8s",
 447                     user_from_uid(kshmptr->u.shm_perm.cuid, 0),
 448                     group_from_gid(kshmptr->u.shm_perm.cgid, 0));
 449
 450         if (option & OUTSTANDING)
 451                 printf(" %12d",
 452                     kshmptr->u.shm_nattch);
 453
 454         if (option & BIGGEST)
 455                 printf(" %12zu",
 456                     kshmptr->u.shm_segsz);
 457
 458         if (option & PID)
 459                 printf(" %12d %12d",
 460                     kshmptr->u.shm_cpid,
 461                     kshmptr->u.shm_lpid);
 462
 463         if (option & TIME)
 464                 printf(" %s %s %s",
 465                     atime_buf,
 466                     dtime_buf,
 467                     ctime_buf);
 468
 469         printf("\n");
 470 }
 471
 472 void
 473 print_ksemtotal(struct seminfo seminfo)
 474 {
 475
 476         printf("seminfo:\n");
 477         printf("\tsemmni: %12d\t(# of semaphore identifiers)\n",
 478             seminfo.semmni);
 479         printf("\tsemmns: %12d\t(# of semaphores in system)\n",
 480             seminfo.semmns);
 481         printf("\tsemmnu: %12d\t(# of undo structures in system)\n",
 482             seminfo.semmnu);
 483         printf("\tsemmsl: %12d\t(max # of semaphores per id)\n",
 484             seminfo.semmsl);
 485         printf("\tsemopm: %12d\t(max # of operations per semop call)\n",
 486             seminfo.semopm);
 487         printf("\tsemume: %12d\t(max # of undo entries per process)\n",
 488             seminfo.semume);
 489         printf("\tsemusz: %12d\t(size in bytes of undo structure)\n",
 490             seminfo.semusz);
 491         printf("\tsemvmx: %12d\t(semaphore maximum value)\n",
 492             seminfo.semvmx);
 493         printf("\tsemaem: %12d\t(adjust on exit max value)\n\n",
 494             seminfo.semaem);
 495 }
 496
 497 void
 498 print_ksemheader(int option)
 499 {
 500
 501         printf("Semaphores:\n");
 502         printf("T %12s %12s %-11s %-8s %-8s",
 503             "ID", "KEY", "MODE", "OWNER", "GROUP");
 504         if (option & CREATOR)
 505                 printf(" %-8s %-8s", "CREATOR", "CGROUP");
 506         if (option & BIGGEST)
 507                 printf(" %12s", "NSEMS");
 508         if (option & TIME)
 509                 printf(" %-8s %-8s", "OTIME", "CTIME");
 510         printf("\n");
 511 }
 512
 513 void
 514 print_ksemptr(int i, int option, struct semid_kernel *ksemaptr)
 515 {
 516         char    ctime_buf[100], otime_buf[100];
 517
 518         cvt_time(ksemaptr->u.sem_otime, otime_buf);
 519         cvt_time(ksemaptr->u.sem_ctime, ctime_buf);
 520
 521         printf("s %12d %12d %s %-8s %-8s",
 522             IXSEQ_TO_IPCID(i, ksemaptr->u.sem_perm),
 523             (int)ksemaptr->u.sem_perm.key,
 524             fmt_perm(ksemaptr->u.sem_perm.mode),
 525             user_from_uid(ksemaptr->u.sem_perm.uid, 0),
 526             group_from_gid(ksemaptr->u.sem_perm.gid, 0));
 527
 528         if (option & CREATOR)
 529                 printf(" %-8s %-8s",
 530                     user_from_uid(ksemaptr->u.sem_perm.cuid, 0),
 531                     group_from_gid(ksemaptr->u.sem_perm.cgid, 0));
 532
 533         if (option & BIGGEST)
 534                 printf(" %12d",
 535                     ksemaptr->u.sem_nsems);
 536
 537         if (option & TIME)
 538                 printf(" %s %s",
 539                     otime_buf,
 540                     ctime_buf);
 541
 542         printf("\n");
 543 }
 544
 545 uid_t
 546 user2uid(char *username)
 547 {
 548         struct passwd *pwd;
 549         uid_t uid;
 550         char *r;
 551
 552         uid = strtoul(username, &r, 0);
 553         if (!*r && r != username)
 554                 return (uid);
 555         if ((pwd = getpwnam(username)) == NULL)
 556                 errx(1, "getpwnam failed: No such user");
 557         endpwent();
 558         return (pwd->pw_uid);
 559 }
 560
 561 void
 562 usage(void)
 563 {
 564
 565         fprintf(stderr,
 566             "usage: "
 567             "ipcs [-abcmopqstyMQST] [-C corefile] [-N namelist] [-u user]\n");
 568         exit(1);
 569 }