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 1.6 2004/06/19 18:55:48 joerg 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/ipc.h>
  47 #include <sys/sem.h>
  48 #include <sys/shm.h>
  49 #include <sys/msg.h>
  50
  51 struct semid_ds *sema;
  52 struct seminfo  seminfo;
  53 struct msginfo  msginfo;
  54 struct msqid_ds *msqids;
  55 struct shminfo  shminfo;
  56 struct shmid_ds *shmsegs;
  57
  58 void    usage(void);
  59
  60 static struct nlist symbols[] = {
  61         {"_sema"},
  62 #define X_SEMA          0
  63         {"_seminfo"},
  64 #define X_SEMINFO       1
  65         {"_semu"},
  66 #define X_SEMU          2
  67         {"_msginfo"},
  68 #define X_MSGINFO       3
  69         {"_msqids"},
  70 #define X_MSQIDS        4
  71         {"_shminfo"},
  72 #define X_SHMINFO       5
  73         {"_shmsegs"},
  74 #define X_SHMSEGS       6
  75         {NULL}
  76 };
  77
  78 static kvm_t *kd;
  79
  80 char   *
  81 fmt_perm(u_short mode)
  82 {
  83         static char buffer[100];
  84
  85         buffer[0] = '-';
  86         buffer[1] = '-';
  87         buffer[2] = ((mode & 0400) ? 'r' : '-');
  88         buffer[3] = ((mode & 0200) ? 'w' : '-');
  89         buffer[4] = ((mode & 0100) ? 'a' : '-');
  90         buffer[5] = ((mode & 0040) ? 'r' : '-');
  91         buffer[6] = ((mode & 0020) ? 'w' : '-');
  92         buffer[7] = ((mode & 0010) ? 'a' : '-');
  93         buffer[8] = ((mode & 0004) ? 'r' : '-');
  94         buffer[9] = ((mode & 0002) ? 'w' : '-');
  95         buffer[10] = ((mode & 0001) ? 'a' : '-');
  96         buffer[11] = '\0';
  97         return (&buffer[0]);
  98 }
  99
 100 void
 101 cvt_time(time_t t, char *buf)
 102 {
 103         struct tm *tm;
 104
 105         if (t == 0) {
 106                 strcpy(buf, "no-entry");
 107         } else {
 108                 tm = localtime(&t);
 109                 sprintf(buf, "%2d:%02d:%02d",
 110                         tm->tm_hour, tm->tm_min, tm->tm_sec);
 111         }
 112 }
 113 #define SHMINFO         1
 114 #define SHMTOTAL        2
 115 #define MSGINFO         4
 116 #define MSGTOTAL        8
 117 #define SEMINFO         16
 118 #define SEMTOTAL        32
 119
 120 #define BIGGEST         1
 121 #define CREATOR         2
 122 #define OUTSTANDING     4
 123 #define PID             8
 124 #define TIME            16
 125
 126 int
 127 main(int argc, char **argv)
 128 {
 129         int     display = SHMINFO | MSGINFO | SEMINFO;
 130         int     option = 0;
 131         char   *core = NULL, *namelist = NULL;
 132         int     i;
 133
 134         while ((i = getopt(argc, argv, "MmQqSsabC:cN:optT")) != -1)
 135                 switch (i) {
 136                 case 'M':
 137                         display = SHMTOTAL;
 138                         break;
 139                 case 'm':
 140                         display = SHMINFO;
 141                         break;
 142                 case 'Q':
 143                         display = MSGTOTAL;
 144                         break;
 145                 case 'q':
 146                         display = MSGINFO;
 147                         break;
 148                 case 'S':
 149                         display = SEMTOTAL;
 150                         break;
 151                 case 's':
 152                         display = SEMINFO;
 153                         break;
 154                 case 'T':
 155                         display = SHMTOTAL | MSGTOTAL | SEMTOTAL;
 156                         break;
 157                 case 'a':
 158                         option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME;
 159                         break;
 160                 case 'b':
 161                         option |= BIGGEST;
 162                         break;
 163                 case 'C':
 164                         core = optarg;
 165                         break;
 166                 case 'c':
 167                         option |= CREATOR;
 168                         break;
 169                 case 'N':
 170                         namelist = optarg;
 171                         break;
 172                 case 'o':
 173                         option |= OUTSTANDING;
 174                         break;
 175                 case 'p':
 176                         option |= PID;
 177                         break;
 178                 case 't':
 179                         option |= TIME;
 180                         break;
 181                 default:
 182                         usage();
 183                 }
 184
 185         /*
 186          * Discard setgid privileges if not the running kernel so that bad
 187          * guys can't print interesting stuff from kernel memory.
 188          */
 189         if (namelist != NULL || core != NULL)
 190                 setgid(getgid());
 191
 192         if ((kd = kvm_open(namelist, core, NULL, O_RDONLY, "ipcs")) == NULL)
 193                 exit(1);
 194
 195         switch (kvm_nlist(kd, symbols)) {
 196         case 0:
 197                 break;
 198         case -1:
 199                 errx(1, "unable to read kernel symbol table");
 200         default:
 201 #ifdef notdef           /* they'll be told more civilly later */
 202                 warnx("nlist failed");
 203                 for (i = 0; symbols[i].n_name != NULL; i++)
 204                         if (symbols[i].n_value == 0)
 205                                 warnx("symbol %s not found",
 206                                     symbols[i].n_name);
 207 #endif
 208                 break;
 209         }
 210
 211         if ((display & (MSGINFO | MSGTOTAL)) &&
 212             kvm_read(kd, symbols[X_MSGINFO].n_value, &msginfo, sizeof(msginfo))== sizeof(msginfo)) {
 213
 214                 if (display & MSGTOTAL) {
 215                         printf("msginfo:\n");
 216                         printf("\tmsgmax: %6d\t(max characters in a message)\n",
 217                             msginfo.msgmax);
 218                         printf("\tmsgmni: %6d\t(# of message queues)\n",
 219                             msginfo.msgmni);
 220                         printf("\tmsgmnb: %6d\t(max characters in a message queue)\n",
 221                             msginfo.msgmnb);
 222                         printf("\tmsgtql: %6d\t(max # of messages in system)\n",
 223                             msginfo.msgtql);
 224                         printf("\tmsgssz: %6d\t(size of a message segment)\n",
 225                             msginfo.msgssz);
 226                         printf("\tmsgseg: %6d\t(# of message segments in system)\n\n",
 227                             msginfo.msgseg);
 228                 }
 229                 if (display & MSGINFO) {
 230                         struct msqid_ds *xmsqids;
 231
 232                         kvm_read(kd, symbols[X_MSQIDS].n_value, &msqids, sizeof(msqids));
 233                         xmsqids = malloc(sizeof(struct msqid_ds) * msginfo.msgmni);
 234                         kvm_read(kd, (u_long) msqids, xmsqids, sizeof(struct msqid_ds) * msginfo.msgmni);
 235
 236                         printf("Message Queues:\n");
 237                         printf("T     ID     KEY        MODE       OWNER    GROUP");
 238                         if (option & CREATOR)
 239                                 printf("  CREATOR   CGROUP");
 240                         if (option & OUTSTANDING)
 241                                 printf(" CBYTES  QNUM");
 242                         if (option & BIGGEST)
 243                                 printf(" QBYTES");
 244                         if (option & PID)
 245                                 printf(" LSPID LRPID");
 246                         if (option & TIME)
 247                                 printf("   STIME    RTIME    CTIME");
 248                         printf("\n");
 249                         for (i = 0; i < msginfo.msgmni; i += 1) {
 250                                 if (xmsqids[i].msg_qbytes != 0) {
 251                                         char    stime_buf[100], rtime_buf[100],
 252                                                 ctime_buf[100];
 253                                         struct msqid_ds *msqptr = &xmsqids[i];
 254
 255                                         cvt_time(msqptr->msg_stime, stime_buf);
 256                                         cvt_time(msqptr->msg_rtime, rtime_buf);
 257                                         cvt_time(msqptr->msg_ctime, ctime_buf);
 258
 259                                         printf("q %6d %10d %s %8s %8s",
 260                                             IXSEQ_TO_IPCID(i, msqptr->msg_perm),
 261                                             msqptr->msg_perm.key,
 262                                             fmt_perm(msqptr->msg_perm.mode),
 263                                             user_from_uid(msqptr->msg_perm.uid, 0),
 264                                             group_from_gid(msqptr->msg_perm.gid, 0));
 265
 266                                         if (option & CREATOR)
 267                                                 printf(" %8s %8s",
 268                                                     user_from_uid(msqptr->msg_perm.cuid, 0),
 269                                                     group_from_gid(msqptr->msg_perm.cgid, 0));
 270
 271                                         if (option & OUTSTANDING)
 272                                                 printf(" %6d %6d",
 273                                                     msqptr->msg_cbytes,
 274                                                     msqptr->msg_qnum);
 275
 276                                         if (option & BIGGEST)
 277                                                 printf(" %6d",
 278                                                     msqptr->msg_qbytes);
 279
 280                                         if (option & PID)
 281                                                 printf(" %6d %6d",
 282                                                     msqptr->msg_lspid,
 283                                                     msqptr->msg_lrpid);
 284
 285                                         if (option & TIME)
 286                                                 printf("%s %s %s",
 287                                                     stime_buf,
 288                                                     rtime_buf,
 289                                                     ctime_buf);
 290
 291                                         printf("\n");
 292                                 }
 293                         }
 294                         printf("\n");
 295                 }
 296         } else
 297                 if (display & (MSGINFO | MSGTOTAL)) {
 298                         fprintf(stderr,
 299                             "SVID messages facility not configured in the system\n");
 300                 }
 301         if ((display & (SHMINFO | SHMTOTAL)) &&
 302             kvm_read(kd, symbols[X_SHMINFO].n_value, &shminfo, sizeof(shminfo))) {
 303                 if (display & SHMTOTAL) {
 304                         printf("shminfo:\n");
 305                         printf("\tshmmax: %7d\t(max shared memory segment size)\n",
 306                             shminfo.shmmax);
 307                         printf("\tshmmin: %7d\t(min shared memory segment size)\n",
 308                             shminfo.shmmin);
 309                         printf("\tshmmni: %7d\t(max number of shared memory identifiers)\n",
 310                             shminfo.shmmni);
 311                         printf("\tshmseg: %7d\t(max shared memory segments per process)\n",
 312                             shminfo.shmseg);
 313                         printf("\tshmall: %7d\t(max amount of shared memory in pages)\n\n",
 314                             shminfo.shmall);
 315                 }
 316                 if (display & SHMINFO) {
 317                         struct shmid_ds *xshmids;
 318
 319                         kvm_read(kd, symbols[X_SHMSEGS].n_value, &shmsegs, sizeof(shmsegs));
 320                         xshmids = malloc(sizeof(struct shmid_ds) * shminfo.shmmni);
 321                         kvm_read(kd, (u_long) shmsegs, xshmids, sizeof(struct shmid_ds) *
 322                             shminfo.shmmni);
 323
 324                         printf("Shared Memory:\n");
 325                         printf("T     ID     KEY        MODE       OWNER    GROUP");
 326                         if (option & CREATOR)
 327                                 printf("  CREATOR   CGROUP");
 328                         if (option & OUTSTANDING)
 329                                 printf(" NATTCH");
 330                         if (option & BIGGEST)
 331                                 printf("  SEGSZ");
 332                         if (option & PID)
 333                                 printf("  CPID  LPID");
 334                         if (option & TIME)
 335                                 printf("   ATIME    DTIME    CTIME");
 336                         printf("\n");
 337                         for (i = 0; i < shminfo.shmmni; i += 1) {
 338                                 if (xshmids[i].shm_perm.mode & 0x0800) {
 339                                         char    atime_buf[100], dtime_buf[100],
 340                                                 ctime_buf[100];
 341                                         struct shmid_ds *shmptr = &xshmids[i];
 342
 343                                         cvt_time(shmptr->shm_atime, atime_buf);
 344                                         cvt_time(shmptr->shm_dtime, dtime_buf);
 345                                         cvt_time(shmptr->shm_ctime, ctime_buf);
 346
 347                                         printf("m %6d %10d %s %8s %8s",
 348                                             IXSEQ_TO_IPCID(i, shmptr->shm_perm),
 349                                             shmptr->shm_perm.key,
 350                                             fmt_perm(shmptr->shm_perm.mode),
 351                                             user_from_uid(shmptr->shm_perm.uid, 0),
 352                                             group_from_gid(shmptr->shm_perm.gid, 0));
 353
 354                                         if (option & CREATOR)
 355                                                 printf(" %8s %8s",
 356                                                     user_from_uid(shmptr->shm_perm.cuid, 0),
 357                                                     group_from_gid(shmptr->shm_perm.cgid, 0));
 358
 359                                         if (option & OUTSTANDING)
 360                                                 printf(" %6d",
 361                                                     shmptr->shm_nattch);
 362
 363                                         if (option & BIGGEST)
 364                                                 printf(" %6d",
 365                                                     shmptr->shm_segsz);
 366
 367                                         if (option & PID)
 368                                                 printf(" %6d %6d",
 369                                                     shmptr->shm_cpid,
 370                                                     shmptr->shm_lpid);
 371
 372                                         if (option & TIME)
 373                                                 printf("%s %s %s",
 374                                                     atime_buf,
 375                                                     dtime_buf,
 376                                                     ctime_buf);
 377
 378                                         printf("\n");
 379                                 }
 380                         }
 381                         printf("\n");
 382                 }
 383         } else
 384                 if (display & (SHMINFO | SHMTOTAL)) {
 385                         fprintf(stderr,
 386                             "SVID shared memory facility not configured in the system\n");
 387                 }
 388         if ((display & (SEMINFO | SEMTOTAL)) &&
 389             kvm_read(kd, symbols[X_SEMINFO].n_value, &seminfo, sizeof(seminfo))) {
 390                 struct semid_ds *xsema;
 391
 392                 if (display & SEMTOTAL) {
 393                         printf("seminfo:\n");
 394                         printf("\tsemmap: %6d\t(# of entries in semaphore map)\n",
 395                             seminfo.semmap);
 396                         printf("\tsemmni: %6d\t(# of semaphore identifiers)\n",
 397                             seminfo.semmni);
 398                         printf("\tsemmns: %6d\t(# of semaphores in system)\n",
 399                             seminfo.semmns);
 400                         printf("\tsemmnu: %6d\t(# of undo structures in system)\n",
 401                             seminfo.semmnu);
 402                         printf("\tsemmsl: %6d\t(max # of semaphores per id)\n",
 403                             seminfo.semmsl);
 404                         printf("\tsemopm: %6d\t(max # of operations per semop call)\n",
 405                             seminfo.semopm);
 406                         printf("\tsemume: %6d\t(max # of undo entries per process)\n",
 407                             seminfo.semume);
 408                         printf("\tsemusz: %6d\t(size in bytes of undo structure)\n",
 409                             seminfo.semusz);
 410                         printf("\tsemvmx: %6d\t(semaphore maximum value)\n",
 411                             seminfo.semvmx);
 412                         printf("\tsemaem: %6d\t(adjust on exit max value)\n\n",
 413                             seminfo.semaem);
 414                 }
 415                 if (display & SEMINFO) {
 416                         kvm_read(kd, symbols[X_SEMA].n_value, &sema, sizeof(sema));
 417                         xsema = malloc(sizeof(struct semid_ds) * seminfo.semmni);
 418                         kvm_read(kd, (u_long) sema, xsema, sizeof(struct semid_ds) * seminfo.semmni);
 419
 420                         printf("Semaphores:\n");
 421                         printf("T     ID     KEY        MODE       OWNER    GROUP");
 422                         if (option & CREATOR)
 423                                 printf("  CREATOR   CGROUP");
 424                         if (option & BIGGEST)
 425                                 printf(" NSEMS");
 426                         if (option & TIME)
 427                                 printf("   OTIME    CTIME");
 428                         printf("\n");
 429                         for (i = 0; i < seminfo.semmni; i += 1) {
 430                                 if ((xsema[i].sem_perm.mode & SEM_ALLOC) != 0) {
 431                                         char    ctime_buf[100], otime_buf[100];
 432                                         struct semid_ds *semaptr = &xsema[i];
 433
 434                                         cvt_time(semaptr->sem_otime, otime_buf);
 435                                         cvt_time(semaptr->sem_ctime, ctime_buf);
 436
 437                                         printf("s %6d %10d %s %8s %8s",
 438                                             IXSEQ_TO_IPCID(i, semaptr->sem_perm),
 439                                             semaptr->sem_perm.key,
 440                                             fmt_perm(semaptr->sem_perm.mode),
 441                                             user_from_uid(semaptr->sem_perm.uid, 0),
 442                                             group_from_gid(semaptr->sem_perm.gid, 0));
 443
 444                                         if (option & CREATOR)
 445                                                 printf(" %8s %8s",
 446                                                     user_from_uid(semaptr->sem_perm.cuid, 0),
 447                                                     group_from_gid(semaptr->sem_perm.cgid, 0));
 448
 449                                         if (option & BIGGEST)
 450                                                 printf(" %6d",
 451                                                     semaptr->sem_nsems);
 452
 453                                         if (option & TIME)
 454                                                 printf("%s %s",
 455                                                     otime_buf,
 456                                                     ctime_buf);
 457
 458                                         printf("\n");
 459                                 }
 460                         }
 461
 462                         printf("\n");
 463                 }
 464         } else
 465                 if (display & (SEMINFO | SEMTOTAL)) {
 466                         fprintf(stderr, "SVID semaphores facility not configured in the system\n");
 467                 }
 468         kvm_close(kd);
 469
 470         exit(0);
 471 }
 472
 473 void
 474 usage(void)
 475 {
 476
 477         fprintf(stderr,
 478             "usage: ipcs [-abcmopqstMQST] [-C corefile] [-N namelist]\n");
 479         exit(1);
 480 }