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 __FBSDID("$FreeBSD$");
  37
  38 #include <sys/param.h>
  39 #define _WANT_SYSVMSG_INTERNALS
  40 #include <sys/msg.h>
  41 #define _WANT_SYSVSEM_INTERNALS
  42 #define _WANT_SEMUN
  43 #include <sys/sem.h>
  44 #define _WANT_SYSVSHM_INTERNALS
  45 #include <sys/shm.h>
  46
  47 #include <ctype.h>
  48 #include <err.h>
  49 #include <grp.h>
  50 #include <kvm.h>
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <unistd.h>
  54
  55 #include "ipc.h"
  56
  57 static int      signaled;
  58 static int      errflg;
  59 static int      rmverbose = 0;
  60
  61 static void
  62 usage(void)
  63 {
  64
  65         fprintf(stderr,
  66             "usage: ipcrm [-W] [-v[v]]\n"
  67             "             [-q msqid] [-m shmid] [-s semid]\n"
  68             "             [-Q msgkey] [-M shmkey] [-S semkey] ...\n");
  69         exit(1);
  70 }
  71
  72 static int
  73 msgrm(key_t key, int id)
  74 {
  75
  76         if (key == -1 || id == -1) {
  77                 struct msqid_kernel *kxmsqids;
  78                 size_t kxmsqids_len;
  79                 int num;
  80
  81                 kget(X_MSGINFO, &msginfo, sizeof(msginfo));
  82                 kxmsqids_len = sizeof(struct msqid_kernel) * msginfo.msgmni;
  83                 kxmsqids = malloc(kxmsqids_len);
  84                 kget(X_MSQIDS, kxmsqids, kxmsqids_len);
  85                 num = msginfo.msgmni;
  86                 while (num-- && !signaled)
  87                         if (kxmsqids[num].u.msg_qbytes != 0) {
  88                                 id = IXSEQ_TO_IPCID(num,
  89                                         kxmsqids[num].u.msg_perm);
  90                                 if (msgctl(id, IPC_RMID, NULL) < 0) {
  91                                         if (rmverbose > 1)
  92                                                 warn("msqid(%d): ", id);
  93                                         errflg++;
  94                                 } else
  95                                         if (rmverbose)
  96                                                 printf(
  97                                                     "Removed %s %d\n",
  98                                                     IPC_TO_STRING('Q'),
  99                                                     id);
 100                         }
 101                 return signaled ? -1 : 0;       /* errors maybe handled above */
 102         }
 103
 104         if (key) {
 105                 id = msgget(key, 0);
 106                 if (id == -1)
 107                         return -1;
 108         }
 109
 110         return msgctl(id, IPC_RMID, NULL);
 111 }
 112
 113 static int
 114 shmrm(key_t key, int id)
 115 {
 116
 117         if (key == -1 || id == -1) {
 118                 struct shmid_kernel *kxshmids;
 119                 size_t kxshmids_len;
 120                 int num;
 121
 122                 kget(X_SHMINFO, &shminfo, sizeof(shminfo));
 123                 kxshmids_len = sizeof(struct shmid_kernel) * shminfo.shmmni;
 124                 kxshmids = malloc(kxshmids_len);
 125                 kget(X_SHMSEGS, kxshmids, kxshmids_len);
 126                 num = shminfo.shmmni;
 127                 while (num-- && !signaled)
 128                         if (kxshmids[num].u.shm_perm.mode & 0x0800) {
 129                                 id = IXSEQ_TO_IPCID(num,
 130                                         kxshmids[num].u.shm_perm);
 131                                 if (shmctl(id, IPC_RMID, NULL) < 0) {
 132                                         if (rmverbose > 1)
 133                                                 warn("shmid(%d): ", id);
 134                                         errflg++;
 135                                 } else
 136                                         if (rmverbose)
 137                                                 printf(
 138                                                     "Removed %s %d\n",
 139                                                     IPC_TO_STRING('M'),
 140                                                     id);
 141                         }
 142                 return signaled ? -1 : 0;       /* errors maybe handled above */
 143         }
 144
 145         if (key) {
 146                 id = shmget(key, 0, 0);
 147                 if (id == -1)
 148                         return -1;
 149         }
 150
 151         return shmctl(id, IPC_RMID, NULL);
 152 }
 153
 154 static int
 155 semrm(key_t key, int id)
 156 {
 157         union semun arg;
 158
 159         if (key == -1 || id == -1) {
 160                 struct semid_kernel *kxsema;
 161                 size_t kxsema_len;
 162                 int num;
 163
 164                 kget(X_SEMINFO, &seminfo, sizeof(seminfo));
 165                 kxsema_len = sizeof(struct semid_kernel) * seminfo.semmni;
 166                 kxsema = malloc(kxsema_len);
 167                 kget(X_SEMA, kxsema, kxsema_len);
 168                 num = seminfo.semmni;
 169                 while (num-- && !signaled)
 170                         if ((kxsema[num].u.sem_perm.mode & SEM_ALLOC) != 0) {
 171                                 id = IXSEQ_TO_IPCID(num,
 172                                         kxsema[num].u.sem_perm);
 173                                 if (semctl(id, 0, IPC_RMID, NULL) < 0) {
 174                                         if (rmverbose > 1)
 175                                                 warn("semid(%d): ", id);
 176                                         errflg++;
 177                                 } else
 178                                         if (rmverbose)
 179                                                 printf(
 180                                                     "Removed %s %d\n",
 181                                                     IPC_TO_STRING('S'),
 182                                                     id);
 183                         }
 184                 return signaled ? -1 : 0;       /* errors maybe handled above */
 185         }
 186
 187         if (key) {
 188                 id = semget(key, 0, 0);
 189                 if (id == -1)
 190                         return -1;
 191         }
 192
 193         return semctl(id, 0, IPC_RMID, arg);
 194 }
 195
 196 static void
 197 not_configured(int signo __unused)
 198 {
 199
 200         signaled++;
 201 }
 202
 203 int
 204 main(int argc, char *argv[])
 205 {
 206         int c, result, target_id;
 207         key_t target_key;
 208
 209         while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
 210
 211                 signaled = 0;
 212                 switch (c) {
 213                 case 'v':
 214                         rmverbose++;
 215                         break;
 216                 case 'y':
 217                         use_sysctl = 0;
 218                         break;
 219                 }
 220         }
 221
 222         optind = 1;
 223         errflg = 0;
 224         signal(SIGSYS, not_configured);
 225         while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
 226
 227                 signaled = 0;
 228                 switch (c) {
 229                 case 'q':
 230                 case 'm':
 231                 case 's':
 232                         target_id = atoi(optarg);
 233                         if (c == 'q')
 234                                 result = msgrm(0, target_id);
 235                         else if (c == 'm')
 236                                 result = shmrm(0, target_id);
 237                         else
 238                                 result = semrm(0, target_id);
 239                         if (result < 0) {
 240                                 errflg++;
 241                                 if (!signaled)
 242                                         warn("%sid(%d): ",
 243                                             IPC_TO_STR(toupper(c)), target_id);
 244                                 else
 245                                         warnx(
 246                                             "%ss are not configured "
 247                                             "in the running kernel",
 248                                             IPC_TO_STRING(toupper(c)));
 249                         }
 250                         break;
 251                 case 'Q':
 252                 case 'M':
 253                 case 'S':
 254                         target_key = atol(optarg);
 255                         if (target_key == IPC_PRIVATE) {
 256                                 warnx("can't remove private %ss",
 257                                     IPC_TO_STRING(c));
 258                                 continue;
 259                         }
 260                         if (c == 'Q')
 261                                 result = msgrm(target_key, 0);
 262                         else if (c == 'M')
 263                                 result = shmrm(target_key, 0);
 264                         else
 265                                 result = semrm(target_key, 0);
 266                         if (result < 0) {
 267                                 errflg++;
 268                                 if (!signaled)
 269                                         warn("%ss(%ld): ",
 270                                             IPC_TO_STR(c), target_key);
 271                                 else
 272                                         warnx("%ss are not configured "
 273                                             "in the running kernel",
 274                                             IPC_TO_STRING(c));
 275                         }
 276                         break;
 277                 case 'v':
 278                 case 'y':
 279                         /* Handled in other getopt() loop */
 280                         break;
 281                 case 'W':
 282                         msgrm(-1, 0);
 283                         shmrm(-1, 0);
 284                         semrm(-1, 0);
 285                         break;
 286                 case ':':
 287                         fprintf(stderr,
 288                             "option -%c requires an argument\n", optopt);
 289                         usage();
 290                 case '?':
 291                         fprintf(stderr, "unrecognized option: -%c\n", optopt);
 292                         usage();
 293                 }
 294         }
 295
 296         if (optind != argc) {
 297                 fprintf(stderr, "unknown argument: %s\n", argv[optind]);
 298                 usage();
 299         }
 300         exit(errflg);
 301 }