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  * $FreeBSD: src/usr.bin/ipcs/ipcs.c,v 1.12.2.4 2003/04/08 11:01:34 tjr Exp $
  28  * $DragonFly: src/usr.bin/ipcs/ipcs.c,v 1.3 2003/08/27 03:21:49 dillon Exp $
  29  */
  30
  31 #define _KERNEL_STRUCTURES
  32
  33 #include <err.h>
  34 #include <fcntl.h>
  35 #include <kvm.h>
  36 #include <nlist.h>
  37 #include <paths.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42
  43 #include <sys/types.h>
  44 #include <sys/param.h>
  45 #include <sys/time.h>
  46 #include <sys/proc.h>
  47 #include <sys/ipc.h>
  48 #include <sys/sem.h>
  49 #include <sys/shm.h>
  50 #include <sys/msg.h>
  51
  52 struct semid_ds *sema;
  53 struct seminfo  seminfo;
  54 struct msginfo  msginfo;
  55 struct msqid_ds *msqids;
  56 struct shminfo  shminfo;
  57 struct shmid_ds *shmsegs;
  58
  59 void    usage __P((void));
  60
  61 static struct nlist symbols[] = {
  62         {"_sema"},
  63 #define X_SEMA          0
  64         {"_seminfo"},
  65 #define X_SEMINFO       1
  66         {"_semu"},
  67 #define X_SEMU          2
  68         {"_msginfo"},
  69 #define X_MSGINFO       3
  70         {"_msqids"},
  71 #define X_MSQIDS        4
  72         {"_shminfo"},
  73 #define X_SHMINFO       5
  74         {"_shmsegs"},
  75 #define X_SHMSEGS       6
  76         {NULL}
  77 };
  78
  79 static kvm_t *kd;
  80
  81 char   *
  82 fmt_perm(mode)
  83         u_short mode;
  84 {
  85         static char buffer[100];
  86
  87         buffer[0] = '-';
  88         buffer[1] = '-';
  89         buffer[2] = ((mode & 0400) ? 'r' : '-');
  90         buffer[3] = ((mode & 0200) ? 'w' : '-');
  91         buffer[4] = ((mode & 0100) ? 'a' : '-');
  92         buffer[5] = ((mode & 0040) ? 'r' : '-');
  93         buffer[6] = ((mode & 0020) ? 'w' : '-');
  94         buffer[7] = ((mode & 0010) ? 'a' : '-');
  95         buffer[8] = ((mode & 0004) ? 'r' : '-');
  96         buffer[9] = ((mode & 0002) ? 'w' : '-');
  97         buffer[10] = ((mode & 0001) ? 'a' : '-');
  98         buffer[11] = '\0';
  99         return (&buffer[0]);
 100 }
 101
 102 void
 103 cvt_time(t, buf)
 104         time_t  t;
 105         char   *buf;
 106 {
 107         struct tm *tm;
 108
 109         if (t == 0) {
 110                 strcpy(buf, "no-entry");
 111         } else {
 112                 tm = localtime(&t);
 113                 sprintf(buf, "%2d:%02d:%02d",
 114                         tm->tm_hour, tm->tm_min, tm->tm_sec);
 115         }
 116 }
 117 #define SHMINFO         1
 118 #define SHMTOTAL        2
 119 #define MSGINFO         4
 120 #define MSGTOTAL        8
 121 #define SEMINFO         16
 122 #define SEMTOTAL        32
 123
 124 #define BIGGEST         1
 125 #define CREATOR         2
 126 #define OUTSTANDING     4
 127 #define PID             8
 128 #define TIME            16
 129
 130 int
 131 main(argc, argv)
 132         int     argc;
 133         char   *argv[];
 134 {
 135         int     display = SHMINFO | MSGINFO | SEMINFO;
 136         int     option = 0;
 137         char   *core = NULL, *namelist = NULL;
 138         int     i;
 139
 140         while ((i = getopt(argc, argv, "MmQqSsabC:cN:optT")) != -1)
 141                 switch (i) {
 142                 case 'M':
 143                         display = SHMTOTAL;
 144                         break;
 145                 case 'm':
 146                         display = SHMINFO;
 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 'a':
 164                         option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME;
 165                         break;
 166                 case 'b':
 167                         option |= BIGGEST;
 168                         break;
 169                 case 'C':
 170                         core = optarg;
 171                         break;
 172                 case 'c':
 173                         option |= CREATOR;
 174                         break;
 175                 case 'N':
 176                         namelist = optarg;
 177                         break;
 178                 case 'o':
 179                         option |= OUTSTANDING;
 180                         break;
 181                 case 'p':
 182                         option |= PID;
 183                         break;
 184                 case 't':
 185                         option |= TIME;
 186                         break;
 187                 default:
 188                         usage();
 189                 }
 190
 191         /*
 192          * Discard setgid privileges if not the running kernel so that bad
 193          * guys can't print interesting stuff from kernel memory.
 194          */
 195         if (namelist != NULL || core != NULL)
 196                 setgid(getgid());
 197
 198         if ((kd = kvm_open(namelist, core, NULL, O_RDONLY, "ipcs")) == NULL)
 199                 exit(1);
 200
 201         switch (kvm_nlist(kd, symbols)) {
 202         case 0:
 203                 break;
 204         case -1:
 205                 errx(1, "unable to read kernel symbol table");
 206         default:
 207 #ifdef notdef           /* they'll be told more civilly later */
 208                 warnx("nlist failed");
 209                 for (i = 0; symbols[i].n_name != NULL; i++)
 210                         if (symbols[i].n_value == 0)
 211                                 warnx("symbol %s not found",
 212                                     symbols[i].n_name);
 213                 break;
 214 #endif
 215         }
 216
 217         if ((display & (MSGINFO | MSGTOTAL)) &&
 218             kvm_read(kd, symbols[X_MSGINFO].n_value, &msginfo, sizeof(msginfo))== sizeof(msginfo)) {
 219
 220                 if (display & MSGTOTAL) {
 221                         printf("msginfo:\n");
 222                         printf("\tmsgmax: %6d\t(max characters in a message)\n",
 223                             msginfo.msgmax);
 224                         printf("\tmsgmni: %6d\t(# of message queues)\n",
 225                             msginfo.msgmni);
 226                         printf("\tmsgmnb: %6d\t(max characters in a message queue)\n",
 227                             msginfo.msgmnb);
 228                         printf("\tmsgtql: %6d\t(max # of messages in system)\n",
 229                             msginfo.msgtql);
 230                         printf("\tmsgssz: %6d\t(size of a message segment)\n",
 231                             msginfo.msgssz);
 232                         printf("\tmsgseg: %6d\t(# of message segments in system)\n\n",
 233                             msginfo.msgseg);
 234                 }
 235                 if (display & MSGINFO) {
 236                         struct msqid_ds *xmsqids;
 237
 238                         kvm_read(kd, symbols[X_MSQIDS].n_value, &msqids, sizeof(msqids));
 239                         xmsqids = malloc(sizeof(struct msqid_ds) * msginfo.msgmni);
 240                         kvm_read(kd, (u_long) msqids, xmsqids, sizeof(struct msqid_ds) * msginfo.msgmni);
 241
 242                         printf("Message Queues:\n");
 243                         printf("T     ID     KEY        MODE       OWNER    GROUP");
 244                         if (option & CREATOR)
 245                                 printf("  CREATOR   CGROUP");
 246                         if (option & OUTSTANDING)
 247                                 printf(" CBYTES  QNUM");
 248                         if (option & BIGGEST)
 249                                 printf(" QBYTES");
 250                         if (option & PID)
 251                                 printf(" LSPID LRPID");
 252                         if (option & TIME)
 253                                 printf("   STIME    RTIME    CTIME");
 254                         printf("\n");
 255                         for (i = 0; i < msginfo.msgmni; i += 1) {
 256                                 if (xmsqids[i].msg_qbytes != 0) {
 257                                         char    stime_buf[100], rtime_buf[100],
 258                                                 ctime_buf[100];
 259                                         struct msqid_ds *msqptr = &xmsqids[i];
 260
 261                                         cvt_time(msqptr->msg_stime, stime_buf);
 262                                         cvt_time(msqptr->msg_rtime, rtime_buf);
 263                                         cvt_time(msqptr->msg_ctime, ctime_buf);
 264
 265                                         printf("q %6d %10d %s %8s %8s",
 266                                             IXSEQ_TO_IPCID(i, msqptr->msg_perm),
 267                                             msqptr->msg_perm.key,
 268                                             fmt_perm(msqptr->msg_perm.mode),
 269                                             user_from_uid(msqptr->msg_perm.uid, 0),
 270                                             group_from_gid(msqptr->msg_perm.gid, 0));
 271
 272                                         if (option & CREATOR)
 273                                                 printf(" %8s %8s",
 274                                                     user_from_uid(msqptr->msg_perm.cuid, 0),
 275                                                     group_from_gid(msqptr->msg_perm.cgid, 0));
 276
 277                                         if (option & OUTSTANDING)
 278                                                 printf(" %6d %6d",
 279                                                     msqptr->msg_cbytes,
 280                                                     msqptr->msg_qnum);
 281
 282                                         if (option & BIGGEST)
 283                                                 printf(" %6d",
 284                                                     msqptr->msg_qbytes);
 285
 286                                         if (option & PID)
 287                                                 printf(" %6d %6d",
 288                                                     msqptr->msg_lspid,
 289                                                     msqptr->msg_lrpid);
 290
 291                                         if (option & TIME)
 292                                                 printf("%s %s %s",
 293                                                     stime_buf,
 294                                                     rtime_buf,
 295                                                     ctime_buf);
 296
 297                                         printf("\n");
 298                                 }
 299                         }
 300                         printf("\n");
 301                 }
 302         } else
 303                 if (display & (MSGINFO | MSGTOTAL)) {
 304                         fprintf(stderr,
 305                             "SVID messages facility not configured in the system\n");
 306                 }
 307         if ((display & (SHMINFO | SHMTOTAL)) &&
 308             kvm_read(kd, symbols[X_SHMINFO].n_value, &shminfo, sizeof(shminfo))) {
 309                 if (display & SHMTOTAL) {
 310                         printf("shminfo:\n");
 311                         printf("\tshmmax: %7d\t(max shared memory segment size)\n",
 312                             shminfo.shmmax);
 313                         printf("\tshmmin: %7d\t(min shared memory segment size)\n",
 314                             shminfo.shmmin);
 315                         printf("\tshmmni: %7d\t(max number of shared memory identifiers)\n",
 316                             shminfo.shmmni);
 317                         printf("\tshmseg: %7d\t(max shared memory segments per process)\n",
 318                             shminfo.shmseg);
 319                         printf("\tshmall: %7d\t(max amount of shared memory in pages)\n\n",
 320                             shminfo.shmall);
 321                 }
 322                 if (display & SHMINFO) {
 323                         struct shmid_ds *xshmids;
 324
 325                         kvm_read(kd, symbols[X_SHMSEGS].n_value, &shmsegs, sizeof(shmsegs));
 326                         xshmids = malloc(sizeof(struct shmid_ds) * shminfo.shmmni);
 327                         kvm_read(kd, (u_long) shmsegs, xshmids, sizeof(struct shmid_ds) *
 328                             shminfo.shmmni);
 329
 330                         printf("Shared Memory:\n");
 331                         printf("T     ID     KEY        MODE       OWNER    GROUP");
 332                         if (option & CREATOR)
 333                                 printf("  CREATOR   CGROUP");
 334                         if (option & OUTSTANDING)
 335                                 printf(" NATTCH");
 336                         if (option & BIGGEST)
 337                                 printf("  SEGSZ");
 338                         if (option & PID)
 339                                 printf("  CPID  LPID");
 340                         if (option & TIME)
 341                                 printf("   ATIME    DTIME    CTIME");
 342                         printf("\n");
 343                         for (i = 0; i < shminfo.shmmni; i += 1) {
 344                                 if (xshmids[i].shm_perm.mode & 0x0800) {
 345                                         char    atime_buf[100], dtime_buf[100],
 346                                                 ctime_buf[100];
 347                                         struct shmid_ds *shmptr = &xshmids[i];
 348
 349                                         cvt_time(shmptr->shm_atime, atime_buf);
 350                                         cvt_time(shmptr->shm_dtime, dtime_buf);
 351                                         cvt_time(shmptr->shm_ctime, ctime_buf);
 352
 353                                         printf("m %6d %10d %s %8s %8s",
 354                                             IXSEQ_TO_IPCID(i, shmptr->shm_perm),
 355                                             shmptr->shm_perm.key,
 356                                             fmt_perm(shmptr->shm_perm.mode),
 357                                             user_from_uid(shmptr->shm_perm.uid, 0),
 358                                             group_from_gid(shmptr->shm_perm.gid, 0));
 359
 360                                         if (option & CREATOR)
 361                                                 printf(" %8s %8s",
 362                                                     user_from_uid(shmptr->shm_perm.cuid, 0),
 363                                                     group_from_gid(shmptr->shm_perm.cgid, 0));
 364
 365                                         if (option & OUTSTANDING)
 366                                                 printf(" %6d",
 367                                                     shmptr->shm_nattch);
 368
 369                                         if (option & BIGGEST)
 370                                                 printf(" %6d",
 371                                                     shmptr->shm_segsz);
 372
 373                                         if (option & PID)
 374                                                 printf(" %6d %6d",
 375                                                     shmptr->shm_cpid,
 376                                                     shmptr->shm_lpid);
 377
 378                                         if (option & TIME)
 379                                                 printf("%s %s %s",
 380                                                     atime_buf,
 381                                                     dtime_buf,
 382                                                     ctime_buf);
 383
 384                                         printf("\n");
 385                                 }
 386                         }
 387                         printf("\n");
 388                 }
 389         } else
 390                 if (display & (SHMINFO | SHMTOTAL)) {
 391                         fprintf(stderr,
 392                             "SVID shared memory facility not configured in the system\n");
 393                 }
 394         if ((display & (SEMINFO | SEMTOTAL)) &&
 395             kvm_read(kd, symbols[X_SEMINFO].n_value, &seminfo, sizeof(seminfo))) {
 396                 struct semid_ds *xsema;
 397
 398                 if (display & SEMTOTAL) {
 399                         printf("seminfo:\n");
 400                         printf("\tsemmap: %6d\t(# of entries in semaphore map)\n",
 401                             seminfo.semmap);
 402                         printf("\tsemmni: %6d\t(# of semaphore identifiers)\n",
 403                             seminfo.semmni);
 404                         printf("\tsemmns: %6d\t(# of semaphores in system)\n",
 405                             seminfo.semmns);
 406                         printf("\tsemmnu: %6d\t(# of undo structures in system)\n",
 407                             seminfo.semmnu);
 408                         printf("\tsemmsl: %6d\t(max # of semaphores per id)\n",
 409                             seminfo.semmsl);
 410                         printf("\tsemopm: %6d\t(max # of operations per semop call)\n",
 411                             seminfo.semopm);
 412                         printf("\tsemume: %6d\t(max # of undo entries per process)\n",
 413                             seminfo.semume);
 414                         printf("\tsemusz: %6d\t(size in bytes of undo structure)\n",
 415                             seminfo.semusz);
 416                         printf("\tsemvmx: %6d\t(semaphore maximum value)\n",
 417                             seminfo.semvmx);
 418                         printf("\tsemaem: %6d\t(adjust on exit max value)\n\n",
 419                             seminfo.semaem);
 420                 }
 421                 if (display & SEMINFO) {
 422                         kvm_read(kd, symbols[X_SEMA].n_value, &sema, sizeof(sema));
 423                         xsema = malloc(sizeof(struct semid_ds) * seminfo.semmni);
 424                         kvm_read(kd, (u_long) sema, xsema, sizeof(struct semid_ds) * seminfo.semmni);
 425
 426                         printf("Semaphores:\n");
 427                         printf("T     ID     KEY        MODE       OWNER    GROUP");
 428                         if (option & CREATOR)
 429                                 printf("  CREATOR   CGROUP");
 430                         if (option & BIGGEST)
 431                                 printf(" NSEMS");
 432                         if (option & TIME)
 433                                 printf("   OTIME    CTIME");
 434                         printf("\n");
 435                         for (i = 0; i < seminfo.semmni; i += 1) {
 436                                 if ((xsema[i].sem_perm.mode & SEM_ALLOC) != 0) {
 437                                         char    ctime_buf[100], otime_buf[100];
 438                                         struct semid_ds *semaptr = &xsema[i];
 439
 440                                         cvt_time(semaptr->sem_otime, otime_buf);
 441                                         cvt_time(semaptr->sem_ctime, ctime_buf);
 442
 443                                         printf("s %6d %10d %s %8s %8s",
 444                                             IXSEQ_TO_IPCID(i, semaptr->sem_perm),
 445                                             semaptr->sem_perm.key,
 446                                             fmt_perm(semaptr->sem_perm.mode),
 447                                             user_from_uid(semaptr->sem_perm.uid, 0),
 448                                             group_from_gid(semaptr->sem_perm.gid, 0));
 449
 450                                         if (option & CREATOR)
 451                                                 printf(" %8s %8s",
 452                                                     user_from_uid(semaptr->sem_perm.cuid, 0),
 453                                                     group_from_gid(semaptr->sem_perm.cgid, 0));
 454
 455                                         if (option & BIGGEST)
 456                                                 printf(" %6d",
 457                                                     semaptr->sem_nsems);
 458
 459                                         if (option & TIME)
 460                                                 printf("%s %s",
 461                                                     otime_buf,
 462                                                     ctime_buf);
 463
 464                                         printf("\n");
 465                                 }
 466                         }
 467
 468                         printf("\n");
 469                 }
 470         } else
 471                 if (display & (SEMINFO | SEMTOTAL)) {
 472                         fprintf(stderr, "SVID semaphores facility not configured in the system\n");
 473                 }
 474         kvm_close(kd);
 475
 476         exit(0);
 477 }
 478
 479 void
 480 usage()
 481 {
 482
 483         fprintf(stderr,
 484             "usage: ipcs [-abcmopqstMQST] [-C corefile] [-N namelist]\n");
 485         exit(1);
 486 }