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 1.4 2003/10/04 20:36:46 hmp 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(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(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(time_t t, char *buf)
 103 {
 104         struct tm *tm;
 105
 106         if (t == 0) {
 107                 strcpy(buf, "no-entry");
 108         } else {
 109                 tm = localtime(&t);
 110                 sprintf(buf, "%2d:%02d:%02d",
 111                         tm->tm_hour, tm->tm_min, tm->tm_sec);
 112         }
 113 }
 114 #define SHMINFO         1
 115 #define SHMTOTAL        2
 116 #define MSGINFO         4
 117 #define MSGTOTAL        8
 118 #define SEMINFO         16
 119 #define SEMTOTAL        32
 120
 121 #define BIGGEST         1
 122 #define CREATOR         2
 123 #define OUTSTANDING     4
 124 #define PID             8
 125 #define TIME            16
 126
 127 int
 128 main(int argc, char **argv)
 129 {
 130         int     display = SHMINFO | MSGINFO | SEMINFO;
 131         int     option = 0;
 132         char   *core = NULL, *namelist = NULL;
 133         int     i;
 134
 135         while ((i = getopt(argc, argv, "MmQqSsabC:cN:optT")) != -1)
 136                 switch (i) {
 137                 case 'M':
 138                         display = SHMTOTAL;
 139                         break;
 140                 case 'm':
 141                         display = SHMINFO;
 142                         break;
 143                 case 'Q':
 144                         display = MSGTOTAL;
 145                         break;
 146                 case 'q':
 147                         display = MSGINFO;
 148                         break;
 149                 case 'S':
 150                         display = SEMTOTAL;
 151                         break;
 152                 case 's':
 153                         display = SEMINFO;
 154                         break;
 155                 case 'T':
 156                         display = SHMTOTAL | MSGTOTAL | SEMTOTAL;
 157                         break;
 158                 case 'a':
 159                         option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME;
 160                         break;
 161                 case 'b':
 162                         option |= BIGGEST;
 163                         break;
 164                 case 'C':
 165                         core = optarg;
 166                         break;
 167                 case 'c':
 168                         option |= CREATOR;
 169                         break;
 170                 case 'N':
 171                         namelist = optarg;
 172                         break;
 173                 case 'o':
 174                         option |= OUTSTANDING;
 175                         break;
 176                 case 'p':
 177                         option |= PID;
 178                         break;
 179                 case 't':
 180                         option |= TIME;
 181                         break;
 182                 default:
 183                         usage();
 184                 }
 185
 186         /*
 187          * Discard setgid privileges if not the running kernel so that bad
 188          * guys can't print interesting stuff from kernel memory.
 189          */
 190         if (namelist != NULL || core != NULL)
 191                 setgid(getgid());
 192
 193         if ((kd = kvm_open(namelist, core, NULL, O_RDONLY, "ipcs")) == NULL)
 194                 exit(1);
 195
 196         switch (kvm_nlist(kd, symbols)) {
 197         case 0:
 198                 break;
 199         case -1:
 200                 errx(1, "unable to read kernel symbol table");
 201         default:
 202 #ifdef notdef           /* they'll be told more civilly later */
 203                 warnx("nlist failed");
 204                 for (i = 0; symbols[i].n_name != NULL; i++)
 205                         if (symbols[i].n_value == 0)
 206                                 warnx("symbol %s not found",
 207                                     symbols[i].n_name);
 208                 break;
 209 #endif
 210         }
 211
 212         if ((display & (MSGINFO | MSGTOTAL)) &&
 213             kvm_read(kd, symbols[X_MSGINFO].n_value, &msginfo, sizeof(msginfo))== sizeof(msginfo)) {
 214
 215                 if (display & MSGTOTAL) {
 216                         printf("msginfo:\n");
 217                         printf("\tmsgmax: %6d\t(max characters in a message)\n",
 218                             msginfo.msgmax);
 219                         printf("\tmsgmni: %6d\t(# of message queues)\n",
 220                             msginfo.msgmni);
 221                         printf("\tmsgmnb: %6d\t(max characters in a message queue)\n",
 222                             msginfo.msgmnb);
 223                         printf("\tmsgtql: %6d\t(max # of messages in system)\n",
 224                             msginfo.msgtql);
 225                         printf("\tmsgssz: %6d\t(size of a message segment)\n",
 226                             msginfo.msgssz);
 227                         printf("\tmsgseg: %6d\t(# of message segments in system)\n\n",
 228                             msginfo.msgseg);
 229                 }
 230                 if (display & MSGINFO) {
 231                         struct msqid_ds *xmsqids;
 232
 233                         kvm_read(kd, symbols[X_MSQIDS].n_value, &msqids, sizeof(msqids));
 234                         xmsqids = malloc(sizeof(struct msqid_ds) * msginfo.msgmni);
 235                         kvm_read(kd, (u_long) msqids, xmsqids, sizeof(struct msqid_ds) * msginfo.msgmni);
 236
 237                         printf("Message Queues:\n");
 238                         printf("T     ID     KEY        MODE       OWNER    GROUP");
 239                         if (option & CREATOR)
 240                                 printf("  CREATOR   CGROUP");
 241                         if (option & OUTSTANDING)
 242                                 printf(" CBYTES  QNUM");
 243                         if (option & BIGGEST)
 244                                 printf(" QBYTES");
 245                         if (option & PID)
 246                                 printf(" LSPID LRPID");
 247                         if (option & TIME)
 248                                 printf("   STIME    RTIME    CTIME");
 249                         printf("\n");
 250                         for (i = 0; i < msginfo.msgmni; i += 1) {
 251                                 if (xmsqids[i].msg_qbytes != 0) {
 252                                         char    stime_buf[100], rtime_buf[100],
 253                                                 ctime_buf[100];
 254                                         struct msqid_ds *msqptr = &xmsqids[i];
 255
 256                                         cvt_time(msqptr->msg_stime, stime_buf);
 257                                         cvt_time(msqptr->msg_rtime, rtime_buf);
 258                                         cvt_time(msqptr->msg_ctime, ctime_buf);
 259
 260                                         printf("q %6d %10d %s %8s %8s",
 261                                             IXSEQ_TO_IPCID(i, msqptr->msg_perm),
 262                                             msqptr->msg_perm.key,
 263                                             fmt_perm(msqptr->msg_perm.mode),
 264                                             user_from_uid(msqptr->msg_perm.uid, 0),
 265                                             group_from_gid(msqptr->msg_perm.gid, 0));
 266
 267                                         if (option & CREATOR)
 268                                                 printf(" %8s %8s",
 269                                                     user_from_uid(msqptr->msg_perm.cuid, 0),
 270                                                     group_from_gid(msqptr->msg_perm.cgid, 0));
 271
 272                                         if (option & OUTSTANDING)
 273                                                 printf(" %6d %6d",
 274                                                     msqptr->msg_cbytes,
 275                                                     msqptr->msg_qnum);
 276
 277                                         if (option & BIGGEST)
 278                                                 printf(" %6d",
 279                                                     msqptr->msg_qbytes);
 280
 281                                         if (option & PID)
 282                                                 printf(" %6d %6d",
 283                                                     msqptr->msg_lspid,
 284                                                     msqptr->msg_lrpid);
 285
 286                                         if (option & TIME)
 287                                                 printf("%s %s %s",
 288                                                     stime_buf,
 289                                                     rtime_buf,
 290                                                     ctime_buf);
 291
 292                                         printf("\n");
 293                                 }
 294                         }
 295                         printf("\n");
 296                 }
 297         } else
 298                 if (display & (MSGINFO | MSGTOTAL)) {
 299                         fprintf(stderr,
 300                             "SVID messages facility not configured in the system\n");
 301                 }
 302         if ((display & (SHMINFO | SHMTOTAL)) &&
 303             kvm_read(kd, symbols[X_SHMINFO].n_value, &shminfo, sizeof(shminfo))) {
 304                 if (display & SHMTOTAL) {
 305                         printf("shminfo:\n");
 306                         printf("\tshmmax: %7d\t(max shared memory segment size)\n",
 307                             shminfo.shmmax);
 308                         printf("\tshmmin: %7d\t(min shared memory segment size)\n",
 309                             shminfo.shmmin);
 310                         printf("\tshmmni: %7d\t(max number of shared memory identifiers)\n",
 311                             shminfo.shmmni);
 312                         printf("\tshmseg: %7d\t(max shared memory segments per process)\n",
 313                             shminfo.shmseg);
 314                         printf("\tshmall: %7d\t(max amount of shared memory in pages)\n\n",
 315                             shminfo.shmall);
 316                 }
 317                 if (display & SHMINFO) {
 318                         struct shmid_ds *xshmids;
 319
 320                         kvm_read(kd, symbols[X_SHMSEGS].n_value, &shmsegs, sizeof(shmsegs));
 321                         xshmids = malloc(sizeof(struct shmid_ds) * shminfo.shmmni);
 322                         kvm_read(kd, (u_long) shmsegs, xshmids, sizeof(struct shmid_ds) *
 323                             shminfo.shmmni);
 324
 325                         printf("Shared Memory:\n");
 326                         printf("T     ID     KEY        MODE       OWNER    GROUP");
 327                         if (option & CREATOR)
 328                                 printf("  CREATOR   CGROUP");
 329                         if (option & OUTSTANDING)
 330                                 printf(" NATTCH");
 331                         if (option & BIGGEST)
 332                                 printf("  SEGSZ");
 333                         if (option & PID)
 334                                 printf("  CPID  LPID");
 335                         if (option & TIME)
 336                                 printf("   ATIME    DTIME    CTIME");
 337                         printf("\n");
 338                         for (i = 0; i < shminfo.shmmni; i += 1) {
 339                                 if (xshmids[i].shm_perm.mode & 0x0800) {
 340                                         char    atime_buf[100], dtime_buf[100],
 341                                                 ctime_buf[100];
 342                                         struct shmid_ds *shmptr = &xshmids[i];
 343
 344                                         cvt_time(shmptr->shm_atime, atime_buf);
 345                                         cvt_time(shmptr->shm_dtime, dtime_buf);
 346                                         cvt_time(shmptr->shm_ctime, ctime_buf);
 347
 348                                         printf("m %6d %10d %s %8s %8s",
 349                                             IXSEQ_TO_IPCID(i, shmptr->shm_perm),
 350                                             shmptr->shm_perm.key,
 351                                             fmt_perm(shmptr->shm_perm.mode),
 352                                             user_from_uid(shmptr->shm_perm.uid, 0),
 353                                             group_from_gid(shmptr->shm_perm.gid, 0));
 354
 355                                         if (option & CREATOR)
 356                                                 printf(" %8s %8s",
 357                                                     user_from_uid(shmptr->shm_perm.cuid, 0),
 358                                                     group_from_gid(shmptr->shm_perm.cgid, 0));
 359
 360                                         if (option & OUTSTANDING)
 361                                                 printf(" %6d",
 362                                                     shmptr->shm_nattch);
 363
 364                                         if (option & BIGGEST)
 365                                                 printf(" %6d",
 366                                                     shmptr->shm_segsz);
 367
 368                                         if (option & PID)
 369                                                 printf(" %6d %6d",
 370                                                     shmptr->shm_cpid,
 371                                                     shmptr->shm_lpid);
 372
 373                                         if (option & TIME)
 374                                                 printf("%s %s %s",
 375                                                     atime_buf,
 376                                                     dtime_buf,
 377                                                     ctime_buf);
 378
 379                                         printf("\n");
 380                                 }
 381                         }
 382                         printf("\n");
 383                 }
 384         } else
 385                 if (display & (SHMINFO | SHMTOTAL)) {
 386                         fprintf(stderr,
 387                             "SVID shared memory facility not configured in the system\n");
 388                 }
 389         if ((display & (SEMINFO | SEMTOTAL)) &&
 390             kvm_read(kd, symbols[X_SEMINFO].n_value, &seminfo, sizeof(seminfo))) {
 391                 struct semid_ds *xsema;
 392
 393                 if (display & SEMTOTAL) {
 394                         printf("seminfo:\n");
 395                         printf("\tsemmap: %6d\t(# of entries in semaphore map)\n",
 396                             seminfo.semmap);
 397                         printf("\tsemmni: %6d\t(# of semaphore identifiers)\n",
 398                             seminfo.semmni);
 399                         printf("\tsemmns: %6d\t(# of semaphores in system)\n",
 400                             seminfo.semmns);
 401                         printf("\tsemmnu: %6d\t(# of undo structures in system)\n",
 402                             seminfo.semmnu);
 403                         printf("\tsemmsl: %6d\t(max # of semaphores per id)\n",
 404                             seminfo.semmsl);
 405                         printf("\tsemopm: %6d\t(max # of operations per semop call)\n",
 406                             seminfo.semopm);
 407                         printf("\tsemume: %6d\t(max # of undo entries per process)\n",
 408                             seminfo.semume);
 409                         printf("\tsemusz: %6d\t(size in bytes of undo structure)\n",
 410                             seminfo.semusz);
 411                         printf("\tsemvmx: %6d\t(semaphore maximum value)\n",
 412                             seminfo.semvmx);
 413                         printf("\tsemaem: %6d\t(adjust on exit max value)\n\n",
 414                             seminfo.semaem);
 415                 }
 416                 if (display & SEMINFO) {
 417                         kvm_read(kd, symbols[X_SEMA].n_value, &sema, sizeof(sema));
 418                         xsema = malloc(sizeof(struct semid_ds) * seminfo.semmni);
 419                         kvm_read(kd, (u_long) sema, xsema, sizeof(struct semid_ds) * seminfo.semmni);
 420
 421                         printf("Semaphores:\n");
 422                         printf("T     ID     KEY        MODE       OWNER    GROUP");
 423                         if (option & CREATOR)
 424                                 printf("  CREATOR   CGROUP");
 425                         if (option & BIGGEST)
 426                                 printf(" NSEMS");
 427                         if (option & TIME)
 428                                 printf("   OTIME    CTIME");
 429                         printf("\n");
 430                         for (i = 0; i < seminfo.semmni; i += 1) {
 431                                 if ((xsema[i].sem_perm.mode & SEM_ALLOC) != 0) {
 432                                         char    ctime_buf[100], otime_buf[100];
 433                                         struct semid_ds *semaptr = &xsema[i];
 434
 435                                         cvt_time(semaptr->sem_otime, otime_buf);
 436                                         cvt_time(semaptr->sem_ctime, ctime_buf);
 437
 438                                         printf("s %6d %10d %s %8s %8s",
 439                                             IXSEQ_TO_IPCID(i, semaptr->sem_perm),
 440                                             semaptr->sem_perm.key,
 441                                             fmt_perm(semaptr->sem_perm.mode),
 442                                             user_from_uid(semaptr->sem_perm.uid, 0),
 443                                             group_from_gid(semaptr->sem_perm.gid, 0));
 444
 445                                         if (option & CREATOR)
 446                                                 printf(" %8s %8s",
 447                                                     user_from_uid(semaptr->sem_perm.cuid, 0),
 448                                                     group_from_gid(semaptr->sem_perm.cgid, 0));
 449
 450                                         if (option & BIGGEST)
 451                                                 printf(" %6d",
 452                                                     semaptr->sem_nsems);
 453
 454                                         if (option & TIME)
 455                                                 printf("%s %s",
 456                                                     otime_buf,
 457                                                     ctime_buf);
 458
 459                                         printf("\n");
 460                                 }
 461                         }
 462
 463                         printf("\n");
 464                 }
 465         } else
 466                 if (display & (SEMINFO | SEMTOTAL)) {
 467                         fprintf(stderr, "SVID semaphores facility not configured in the system\n");
 468                 }
 469         kvm_close(kd);
 470
 471         exit(0);
 472 }
 473
 474 void
 475 usage(void)
 476 {
 477
 478         fprintf(stderr,
 479             "usage: ipcs [-abcmopqstMQST] [-C corefile] [-N namelist]\n");
 480         exit(1);
 481 }