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