usr.bin/ipcrm/ipcrm.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-4-Clause
   3  *
   4  * Copyright (c) 1994 Adam Glass
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Adam Glass.
  18  * 4. The name of the Author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY Adam Glass ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL Adam Glass BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #include <sys/param.h>
  37 #define _WANT_SYSVMSG_INTERNALS
  38 #include <sys/msg.h>
  39 #define _WANT_SYSVSEM_INTERNALS
  40 #define _WANT_SEMUN
  41 #include <sys/sem.h>
  42 #define _WANT_SYSVSHM_INTERNALS
  43 #include <sys/shm.h>
  44
  45 #include <ctype.h>
  46 #include <err.h>
  47 #include <grp.h>
  48 #include <kvm.h>
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <unistd.h>
  52
  53 #include "ipc.h"
  54
  55 static int      signaled;
  56 static int      errflg;
  57 static int      rmverbose = 0;
  58
  59 static void
  60 usage(void)
  61 {
  62
  63         fprintf(stderr,
  64             "usage: ipcrm [-W] [-v[v]]\n"
  65             "             [-q msqid] [-m shmid] [-s semid]\n"
  66             "             [-Q msgkey] [-M shmkey] [-S semkey] ...\n");
  67         exit(1);
  68 }
  69
  70 static int
  71 msgrm(key_t key, int id)
  72 {
  73
  74         if (key == -1 || id == -1) {
  75                 struct msqid_kernel *kxmsqids;
  76                 size_t kxmsqids_len;
  77                 int num;
  78
  79                 kget(X_MSGINFO, &msginfo, sizeof(msginfo));
  80                 kxmsqids_len = sizeof(struct msqid_kernel) * msginfo.msgmni;
  81                 kxmsqids = malloc(kxmsqids_len);
  82                 kget(X_MSQIDS, kxmsqids, kxmsqids_len);
  83                 num = msginfo.msgmni;
  84                 while (num-- && !signaled)
  85                         if (kxmsqids[num].u.msg_qbytes != 0) {
  86                                 id = IXSEQ_TO_IPCID(num,
  87                                         kxmsqids[num].u.msg_perm);
  88                                 if (msgctl(id, IPC_RMID, NULL) < 0) {
  89                                         if (rmverbose > 1)
  90                                                 warn("msqid(%d): ", id);
  91                                         errflg++;
  92                                 } else
  93                                         if (rmverbose)
  94                                                 printf(
  95                                                     "Removed %s %d\n",
  96                                                     IPC_TO_STRING('Q'),
  97                                                     id);
  98                         }
  99                 return signaled ? -1 : 0;       /* errors maybe handled above */
 100         }
 101
 102         if (key) {
 103                 id = msgget(key, 0);
 104                 if (id == -1)
 105                         return -1;
 106         }
 107
 108         return msgctl(id, IPC_RMID, NULL);
 109 }
 110
 111 static int
 112 shmrm(key_t key, int id)
 113 {
 114
 115         if (key == -1 || id == -1) {
 116                 struct shmid_kernel *kxshmids;
 117                 size_t kxshmids_len;
 118                 int num;
 119
 120                 kget(X_SHMINFO, &shminfo, sizeof(shminfo));
 121                 kxshmids_len = sizeof(struct shmid_kernel) * shminfo.shmmni;
 122                 kxshmids = malloc(kxshmids_len);
 123                 kget(X_SHMSEGS, kxshmids, kxshmids_len);
 124                 num = shminfo.shmmni;
 125                 while (num-- && !signaled)
 126                         if (kxshmids[num].u.shm_perm.mode & 0x0800) {
 127                                 id = IXSEQ_TO_IPCID(num,
 128                                         kxshmids[num].u.shm_perm);
 129                                 if (shmctl(id, IPC_RMID, NULL) < 0) {
 130                                         if (rmverbose > 1)
 131                                                 warn("shmid(%d): ", id);
 132                                         errflg++;
 133                                 } else
 134                                         if (rmverbose)
 135                                                 printf(
 136                                                     "Removed %s %d\n",
 137                                                     IPC_TO_STRING('M'),
 138                                                     id);
 139                         }
 140                 return signaled ? -1 : 0;       /* errors maybe handled above */
 141         }
 142
 143         if (key) {
 144                 id = shmget(key, 0, 0);
 145                 if (id == -1)
 146                         return -1;
 147         }
 148
 149         return shmctl(id, IPC_RMID, NULL);
 150 }
 151
 152 static int
 153 semrm(key_t key, int id)
 154 {
 155         union semun arg;
 156
 157         if (key == -1 || id == -1) {
 158                 struct semid_kernel *kxsema;
 159                 size_t kxsema_len;
 160                 int num;
 161
 162                 kget(X_SEMINFO, &seminfo, sizeof(seminfo));
 163                 kxsema_len = sizeof(struct semid_kernel) * seminfo.semmni;
 164                 kxsema = malloc(kxsema_len);
 165                 kget(X_SEMA, kxsema, kxsema_len);
 166                 num = seminfo.semmni;
 167                 while (num-- && !signaled)
 168                         if ((kxsema[num].u.sem_perm.mode & SEM_ALLOC) != 0) {
 169                                 id = IXSEQ_TO_IPCID(num,
 170                                         kxsema[num].u.sem_perm);
 171                                 if (semctl(id, 0, IPC_RMID, NULL) < 0) {
 172                                         if (rmverbose > 1)
 173                                                 warn("semid(%d): ", id);
 174                                         errflg++;
 175                                 } else
 176                                         if (rmverbose)
 177                                                 printf(
 178                                                     "Removed %s %d\n",
 179                                                     IPC_TO_STRING('S'),
 180                                                     id);
 181                         }
 182                 return signaled ? -1 : 0;       /* errors maybe handled above */
 183         }
 184
 185         if (key) {
 186                 id = semget(key, 0, 0);
 187                 if (id == -1)
 188                         return -1;
 189         }
 190
 191         return semctl(id, 0, IPC_RMID, arg);
 192 }
 193
 194 static void
 195 not_configured(int signo __unused)
 196 {
 197
 198         signaled++;
 199 }
 200
 201 int
 202 main(int argc, char *argv[])
 203 {
 204         int c, result, target_id;
 205         key_t target_key;
 206
 207         while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
 208
 209                 signaled = 0;
 210                 switch (c) {
 211                 case 'v':
 212                         rmverbose++;
 213                         break;
 214                 case 'y':
 215                         use_sysctl = 0;
 216                         break;
 217                 }
 218         }
 219
 220         optind = 1;
 221         errflg = 0;
 222         signal(SIGSYS, not_configured);
 223         while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
 224
 225                 signaled = 0;
 226                 switch (c) {
 227                 case 'q':
 228                 case 'm':
 229                 case 's':
 230                         target_id = atoi(optarg);
 231                         if (c == 'q')
 232                                 result = msgrm(0, target_id);
 233                         else if (c == 'm')
 234                                 result = shmrm(0, target_id);
 235                         else
 236                                 result = semrm(0, target_id);
 237                         if (result < 0) {
 238                                 errflg++;
 239                                 if (!signaled)
 240                                         warn("%sid(%d): ",
 241                                             IPC_TO_STR(toupper(c)), target_id);
 242                                 else
 243                                         warnx(
 244                                             "%ss are not configured "
 245                                             "in the running kernel",
 246                                             IPC_TO_STRING(toupper(c)));
 247                         }
 248                         break;
 249                 case 'Q':
 250                 case 'M':
 251                 case 'S':
 252                         target_key = atol(optarg);
 253                         if (target_key == IPC_PRIVATE) {
 254                                 warnx("can't remove private %ss",
 255                                     IPC_TO_STRING(c));
 256                                 continue;
 257                         }
 258                         if (c == 'Q')
 259                                 result = msgrm(target_key, 0);
 260                         else if (c == 'M')
 261                                 result = shmrm(target_key, 0);
 262                         else
 263                                 result = semrm(target_key, 0);
 264                         if (result < 0) {
 265                                 errflg++;
 266                                 if (!signaled)
 267                                         warn("%ss(%ld): ",
 268                                             IPC_TO_STR(c), target_key);
 269                                 else
 270                                         warnx("%ss are not configured "
 271                                             "in the running kernel",
 272                                             IPC_TO_STRING(c));
 273                         }
 274                         break;
 275                 case 'v':
 276                 case 'y':
 277                         /* Handled in other getopt() loop */
 278                         break;
 279                 case 'W':
 280                         msgrm(-1, 0);
 281                         shmrm(-1, 0);
 282                         semrm(-1, 0);
 283                         break;
 284                 case ':':
 285                         fprintf(stderr,
 286                             "option -%c requires an argument\n", optopt);
 287                         usage();
 288                 case '?':
 289                         fprintf(stderr, "unrecognized option: -%c\n", optopt);
 290                         usage();
 291                 }
 292         }
 293
 294         if (optind != argc) {
 295                 fprintf(stderr, "unknown argument: %s\n", argv[optind]);
 296                 usage();
 297         }
 298         exit(errflg);
 299 }