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 1.2 2003/06/17 04:29:27 dillon Exp $
  29  */
  30
  31 #include <err.h>
  32 #include <fcntl.h>
  33 #include <kvm.h>
  34 #include <nlist.h>
  35 #include <paths.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <unistd.h>
  40
  41 #include <sys/types.h>
  42 #include <sys/param.h>
  43 #include <sys/time.h>
  44 #include <sys/proc.h>
  45 #define _KERNEL
  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 __P((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(mode)
  82         u_short mode;
  83 {
  84         static char buffer[100];
  85
  86         buffer[0] = '-';
  87         buffer[1] = '-';
  88         buffer[2] = ((mode & 0400) ? 'r' : '-');
  89         buffer[3] = ((mode & 0200) ? 'w' : '-');
  90         buffer[4] = ((mode & 0100) ? 'a' : '-');
  91         buffer[5] = ((mode & 0040) ? 'r' : '-');
  92         buffer[6] = ((mode & 0020) ? 'w' : '-');
  93         buffer[7] = ((mode & 0010) ? 'a' : '-');
  94         buffer[8] = ((mode & 0004) ? 'r' : '-');
  95         buffer[9] = ((mode & 0002) ? 'w' : '-');
  96         buffer[10] = ((mode & 0001) ? 'a' : '-');
  97         buffer[11] = '\0';
  98         return (&buffer[0]);
  99 }
 100
 101 void
 102 cvt_time(t, buf)
 103         time_t  t;
 104         char   *buf;
 105 {
 106         struct tm *tm;
 107
 108         if (t == 0) {
 109                 strcpy(buf, "no-entry");
 110         } else {
 111                 tm = localtime(&t);
 112                 sprintf(buf, "%2d:%02d:%02d",
 113                         tm->tm_hour, tm->tm_min, tm->tm_sec);
 114         }
 115 }
 116 #define SHMINFO         1
 117 #define SHMTOTAL        2
 118 #define MSGINFO         4
 119 #define MSGTOTAL        8
 120 #define SEMINFO         16
 121 #define SEMTOTAL        32
 122
 123 #define BIGGEST         1
 124 #define CREATOR         2
 125 #define OUTSTANDING     4
 126 #define PID             8
 127 #define TIME            16
 128
 129 int
 130 main(argc, argv)
 131         int     argc;
 132         char   *argv[];
 133 {
 134         int     display = SHMINFO | MSGINFO | SEMINFO;
 135         int     option = 0;
 136         char   *core = NULL, *namelist = NULL;
 137         int     i;
 138
 139         while ((i = getopt(argc, argv, "MmQqSsabC:cN:optT")) != -1)
 140                 switch (i) {
 141                 case 'M':
 142                         display = SHMTOTAL;
 143                         break;
 144                 case 'm':
 145                         display = SHMINFO;
 146                         break;
 147                 case 'Q':
 148                         display = MSGTOTAL;
 149                         break;
 150                 case 'q':
 151                         display = MSGINFO;
 152                         break;
 153                 case 'S':
 154                         display = SEMTOTAL;
 155                         break;
 156                 case 's':
 157                         display = SEMINFO;
 158                         break;
 159                 case 'T':
 160                         display = SHMTOTAL | MSGTOTAL | SEMTOTAL;
 161                         break;
 162                 case 'a':
 163                         option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME;
 164                         break;
 165                 case 'b':
 166                         option |= BIGGEST;
 167                         break;
 168                 case 'C':
 169                         core = optarg;
 170                         break;
 171                 case 'c':
 172                         option |= CREATOR;
 173                         break;
 174                 case 'N':
 175                         namelist = optarg;
 176                         break;
 177                 case 'o':
 178                         option |= OUTSTANDING;
 179                         break;
 180                 case 'p':
 181                         option |= PID;
 182                         break;
 183                 case 't':
 184                         option |= TIME;
 185                         break;
 186                 default:
 187                         usage();
 188                 }
 189
 190         /*
 191          * Discard setgid privileges if not the running kernel so that bad
 192          * guys can't print interesting stuff from kernel memory.
 193          */
 194         if (namelist != NULL || core != NULL)
 195                 setgid(getgid());
 196
 197         if ((kd = kvm_open(namelist, core, NULL, O_RDONLY, "ipcs")) == NULL)
 198                 exit(1);
 199
 200         switch (kvm_nlist(kd, symbols)) {
 201         case 0:
 202                 break;
 203         case -1:
 204                 errx(1, "unable to read kernel symbol table");
 205         default:
 206 #ifdef notdef           /* they'll be told more civilly later */
 207                 warnx("nlist failed");
 208                 for (i = 0; symbols[i].n_name != NULL; i++)
 209                         if (symbols[i].n_value == 0)
 210                                 warnx("symbol %s not found",
 211                                     symbols[i].n_name);
 212                 break;
 213 #endif
 214         }
 215
 216         if ((display & (MSGINFO | MSGTOTAL)) &&
 217             kvm_read(kd, symbols[X_MSGINFO].n_value, &msginfo, sizeof(msginfo))== sizeof(msginfo)) {
 218
 219                 if (display & MSGTOTAL) {
 220                         printf("msginfo:\n");
 221                         printf("\tmsgmax: %6d\t(max characters in a message)\n",
 222                             msginfo.msgmax);
 223                         printf("\tmsgmni: %6d\t(# of message queues)\n",
 224                             msginfo.msgmni);
 225                         printf("\tmsgmnb: %6d\t(max characters in a message queue)\n",
 226                             msginfo.msgmnb);
 227                         printf("\tmsgtql: %6d\t(max # of messages in system)\n",
 228                             msginfo.msgtql);
 229                         printf("\tmsgssz: %6d\t(size of a message segment)\n",
 230                             msginfo.msgssz);
 231                         printf("\tmsgseg: %6d\t(# of message segments in system)\n\n",
 232                             msginfo.msgseg);
 233                 }
 234                 if (display & MSGINFO) {
 235                         struct msqid_ds *xmsqids;
 236
 237                         kvm_read(kd, symbols[X_MSQIDS].n_value, &msqids, sizeof(msqids));
 238                         xmsqids = malloc(sizeof(struct msqid_ds) * msginfo.msgmni);
 239                         kvm_read(kd, (u_long) msqids, xmsqids, sizeof(struct msqid_ds) * msginfo.msgmni);
 240
 241                         printf("Message Queues:\n");
 242                         printf("T     ID     KEY        MODE       OWNER    GROUP");
 243                         if (option & CREATOR)
 244                                 printf("  CREATOR   CGROUP");
 245                         if (option & OUTSTANDING)
 246                                 printf(" CBYTES  QNUM");
 247                         if (option & BIGGEST)
 248                                 printf(" QBYTES");
 249                         if (option & PID)
 250                                 printf(" LSPID LRPID");
 251                         if (option & TIME)
 252                                 printf("   STIME    RTIME    CTIME");
 253                         printf("\n");
 254                         for (i = 0; i < msginfo.msgmni; i += 1) {
 255                                 if (xmsqids[i].msg_qbytes != 0) {
 256                                         char    stime_buf[100], rtime_buf[100],
 257                                                 ctime_buf[100];
 258                                         struct msqid_ds *msqptr = &xmsqids[i];
 259
 260                                         cvt_time(msqptr->msg_stime, stime_buf);
 261                                         cvt_time(msqptr->msg_rtime, rtime_buf);
 262                                         cvt_time(msqptr->msg_ctime, ctime_buf);
 263
 264                                         printf("q %6d %10d %s %8s %8s",
 265                                             IXSEQ_TO_IPCID(i, msqptr->msg_perm),
 266                                             msqptr->msg_perm.key,
 267                                             fmt_perm(msqptr->msg_perm.mode),
 268                                             user_from_uid(msqptr->msg_perm.uid, 0),
 269                                             group_from_gid(msqptr->msg_perm.gid, 0));
 270
 271                                         if (option & CREATOR)
 272                                                 printf(" %8s %8s",
 273                                                     user_from_uid(msqptr->msg_perm.cuid, 0),
 274                                                     group_from_gid(msqptr->msg_perm.cgid, 0));
 275
 276                                         if (option & OUTSTANDING)
 277                                                 printf(" %6d %6d",
 278                                                     msqptr->msg_cbytes,
 279                                                     msqptr->msg_qnum);
 280
 281                                         if (option & BIGGEST)
 282                                                 printf(" %6d",
 283                                                     msqptr->msg_qbytes);
 284
 285                                         if (option & PID)
 286                                                 printf(" %6d %6d",
 287                                                     msqptr->msg_lspid,
 288                                                     msqptr->msg_lrpid);
 289
 290                                         if (option & TIME)
 291                                                 printf("%s %s %s",
 292                                                     stime_buf,
 293                                                     rtime_buf,
 294                                                     ctime_buf);
 295
 296                                         printf("\n");
 297                                 }
 298                         }
 299                         printf("\n");
 300                 }
 301         } else
 302                 if (display & (MSGINFO | MSGTOTAL)) {
 303                         fprintf(stderr,
 304                             "SVID messages facility not configured in the system\n");
 305                 }
 306         if ((display & (SHMINFO | SHMTOTAL)) &&
 307             kvm_read(kd, symbols[X_SHMINFO].n_value, &shminfo, sizeof(shminfo))) {
 308                 if (display & SHMTOTAL) {
 309                         printf("shminfo:\n");
 310                         printf("\tshmmax: %7d\t(max shared memory segment size)\n",
 311                             shminfo.shmmax);
 312                         printf("\tshmmin: %7d\t(min shared memory segment size)\n",
 313                             shminfo.shmmin);
 314                         printf("\tshmmni: %7d\t(max number of shared memory identifiers)\n",
 315                             shminfo.shmmni);
 316                         printf("\tshmseg: %7d\t(max shared memory segments per process)\n",
 317                             shminfo.shmseg);
 318                         printf("\tshmall: %7d\t(max amount of shared memory in pages)\n\n",
 319                             shminfo.shmall);
 320                 }
 321                 if (display & SHMINFO) {
 322                         struct shmid_ds *xshmids;
 323
 324                         kvm_read(kd, symbols[X_SHMSEGS].n_value, &shmsegs, sizeof(shmsegs));
 325                         xshmids = malloc(sizeof(struct shmid_ds) * shminfo.shmmni);
 326                         kvm_read(kd, (u_long) shmsegs, xshmids, sizeof(struct shmid_ds) *
 327                             shminfo.shmmni);
 328
 329                         printf("Shared Memory:\n");
 330                         printf("T     ID     KEY        MODE       OWNER    GROUP");
 331                         if (option & CREATOR)
 332                                 printf("  CREATOR   CGROUP");
 333                         if (option & OUTSTANDING)
 334                                 printf(" NATTCH");
 335                         if (option & BIGGEST)
 336                                 printf("  SEGSZ");
 337                         if (option & PID)
 338                                 printf("  CPID  LPID");
 339                         if (option & TIME)
 340                                 printf("   ATIME    DTIME    CTIME");
 341                         printf("\n");
 342                         for (i = 0; i < shminfo.shmmni; i += 1) {
 343                                 if (xshmids[i].shm_perm.mode & 0x0800) {
 344                                         char    atime_buf[100], dtime_buf[100],
 345                                                 ctime_buf[100];
 346                                         struct shmid_ds *shmptr = &xshmids[i];
 347
 348                                         cvt_time(shmptr->shm_atime, atime_buf);
 349                                         cvt_time(shmptr->shm_dtime, dtime_buf);
 350                                         cvt_time(shmptr->shm_ctime, ctime_buf);
 351
 352                                         printf("m %6d %10d %s %8s %8s",
 353                                             IXSEQ_TO_IPCID(i, shmptr->shm_perm),
 354                                             shmptr->shm_perm.key,
 355                                             fmt_perm(shmptr->shm_perm.mode),
 356                                             user_from_uid(shmptr->shm_perm.uid, 0),
 357                                             group_from_gid(shmptr->shm_perm.gid, 0));
 358
 359                                         if (option & CREATOR)
 360                                                 printf(" %8s %8s",
 361                                                     user_from_uid(shmptr->shm_perm.cuid, 0),
 362                                                     group_from_gid(shmptr->shm_perm.cgid, 0));
 363
 364                                         if (option & OUTSTANDING)
 365                                                 printf(" %6d",
 366                                                     shmptr->shm_nattch);
 367
 368                                         if (option & BIGGEST)
 369                                                 printf(" %6d",
 370                                                     shmptr->shm_segsz);
 371
 372                                         if (option & PID)
 373                                                 printf(" %6d %6d",
 374                                                     shmptr->shm_cpid,
 375                                                     shmptr->shm_lpid);
 376
 377                                         if (option & TIME)
 378                                                 printf("%s %s %s",
 379                                                     atime_buf,
 380                                                     dtime_buf,
 381                                                     ctime_buf);
 382
 383                                         printf("\n");
 384                                 }
 385                         }
 386                         printf("\n");
 387                 }
 388         } else
 389                 if (display & (SHMINFO | SHMTOTAL)) {
 390                         fprintf(stderr,
 391                             "SVID shared memory facility not configured in the system\n");
 392                 }
 393         if ((display & (SEMINFO | SEMTOTAL)) &&
 394             kvm_read(kd, symbols[X_SEMINFO].n_value, &seminfo, sizeof(seminfo))) {
 395                 struct semid_ds *xsema;
 396
 397                 if (display & SEMTOTAL) {
 398                         printf("seminfo:\n");
 399                         printf("\tsemmap: %6d\t(# of entries in semaphore map)\n",
 400                             seminfo.semmap);
 401                         printf("\tsemmni: %6d\t(# of semaphore identifiers)\n",
 402                             seminfo.semmni);
 403                         printf("\tsemmns: %6d\t(# of semaphores in system)\n",
 404                             seminfo.semmns);
 405                         printf("\tsemmnu: %6d\t(# of undo structures in system)\n",
 406                             seminfo.semmnu);
 407                         printf("\tsemmsl: %6d\t(max # of semaphores per id)\n",
 408                             seminfo.semmsl);
 409                         printf("\tsemopm: %6d\t(max # of operations per semop call)\n",
 410                             seminfo.semopm);
 411                         printf("\tsemume: %6d\t(max # of undo entries per process)\n",
 412                             seminfo.semume);
 413                         printf("\tsemusz: %6d\t(size in bytes of undo structure)\n",
 414                             seminfo.semusz);
 415                         printf("\tsemvmx: %6d\t(semaphore maximum value)\n",
 416                             seminfo.semvmx);
 417                         printf("\tsemaem: %6d\t(adjust on exit max value)\n\n",
 418                             seminfo.semaem);
 419                 }
 420                 if (display & SEMINFO) {
 421                         kvm_read(kd, symbols[X_SEMA].n_value, &sema, sizeof(sema));
 422                         xsema = malloc(sizeof(struct semid_ds) * seminfo.semmni);
 423                         kvm_read(kd, (u_long) sema, xsema, sizeof(struct semid_ds) * seminfo.semmni);
 424
 425                         printf("Semaphores:\n");
 426                         printf("T     ID     KEY        MODE       OWNER    GROUP");
 427                         if (option & CREATOR)
 428                                 printf("  CREATOR   CGROUP");
 429                         if (option & BIGGEST)
 430                                 printf(" NSEMS");
 431                         if (option & TIME)
 432                                 printf("   OTIME    CTIME");
 433                         printf("\n");
 434                         for (i = 0; i < seminfo.semmni; i += 1) {
 435                                 if ((xsema[i].sem_perm.mode & SEM_ALLOC) != 0) {
 436                                         char    ctime_buf[100], otime_buf[100];
 437                                         struct semid_ds *semaptr = &xsema[i];
 438
 439                                         cvt_time(semaptr->sem_otime, otime_buf);
 440                                         cvt_time(semaptr->sem_ctime, ctime_buf);
 441
 442                                         printf("s %6d %10d %s %8s %8s",
 443                                             IXSEQ_TO_IPCID(i, semaptr->sem_perm),
 444                                             semaptr->sem_perm.key,
 445                                             fmt_perm(semaptr->sem_perm.mode),
 446                                             user_from_uid(semaptr->sem_perm.uid, 0),
 447                                             group_from_gid(semaptr->sem_perm.gid, 0));
 448
 449                                         if (option & CREATOR)
 450                                                 printf(" %8s %8s",
 451                                                     user_from_uid(semaptr->sem_perm.cuid, 0),
 452                                                     group_from_gid(semaptr->sem_perm.cgid, 0));
 453
 454                                         if (option & BIGGEST)
 455                                                 printf(" %6d",
 456                                                     semaptr->sem_nsems);
 457
 458                                         if (option & TIME)
 459                                                 printf("%s %s",
 460                                                     otime_buf,
 461                                                     ctime_buf);
 462
 463                                         printf("\n");
 464                                 }
 465                         }
 466
 467                         printf("\n");
 468                 }
 469         } else
 470                 if (display & (SEMINFO | SEMTOTAL)) {
 471                         fprintf(stderr, "SVID semaphores facility not configured in the system\n");
 472                 }
 473         kvm_close(kd);
 474
 475         exit(0);
 476 }
 477
 478 void
 479 usage()
 480 {
 481
 482         fprintf(stderr,
 483             "usage: ipcs [-abcmopqstMQST] [-C corefile] [-N namelist]\n");
 484         exit(1);
 485 }