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_MSG_PROTOTYPES
  40 #define _WANT_SEM_PROTOTYPES
  41 #define _WANT_SHM_PROTOTYPES
  42 #define _KERNEL
  43 #include <sys/sem.h>
  44 #include <sys/shm.h>
  45 #include <sys/msg.h>
  46 #undef _KERNEL
  47
  48 #include <ctype.h>
  49 #include <err.h>
  50 #include <grp.h>
  51 #include <kvm.h>
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <unistd.h>
  55
  56 #include "ipc.h"
  57
  58 static int      signaled;
  59 static int      errflg;
  60 static int      rmverbose = 0;
  61
  62 static void
  63 usage(void)
  64 {
  65
  66         fprintf(stderr,
  67             "usage: ipcrm [-W] [-v[v]]\n"
  68             "             [-q msqid] [-m shmid] [-s semid]\n"
  69             "             [-Q msgkey] [-M shmkey] [-S semkey] ...\n");
  70         exit(1);
  71 }
  72
  73 static int
  74 msgrm(key_t key, int id)
  75 {
  76
  77         if (key == -1 || id == -1) {
  78                 struct msqid_kernel *kxmsqids;
  79                 size_t kxmsqids_len;
  80                 int num;
  81
  82                 kget(X_MSGINFO, &msginfo, sizeof(msginfo));
  83                 kxmsqids_len = sizeof(struct msqid_kernel) * msginfo.msgmni;
  84                 kxmsqids = malloc(kxmsqids_len);
  85                 kget(X_MSQIDS, kxmsqids, kxmsqids_len);
  86                 num = msginfo.msgmni;
  87                 while (num-- && !signaled)
  88                         if (kxmsqids[num].u.msg_qbytes != 0) {
  89                                 id = IXSEQ_TO_IPCID(num,
  90                                         kxmsqids[num].u.msg_perm);
  91                                 if (msgctl(id, IPC_RMID, NULL) < 0) {
  92                                         if (rmverbose > 1)
  93                                                 warn("msqid(%d): ", id);
  94                                         errflg++;
  95                                 } else
  96                                         if (rmverbose)
  97                                                 printf(
  98                                                     "Removed %s %d\n",
  99                                                     IPC_TO_STRING('Q'),
 100                                                     id);
 101                         }
 102                 return signaled ? -1 : 0;       /* errors maybe handled above */
 103         }
 104
 105         if (key) {
 106                 id = msgget(key, 0);
 107                 if (id == -1)
 108                         return -1;
 109         }
 110
 111         return msgctl(id, IPC_RMID, NULL);
 112 }
 113
 114 static int
 115 shmrm(key_t key, int id)
 116 {
 117
 118         if (key == -1 || id == -1) {
 119                 struct shmid_kernel *kxshmids;
 120                 size_t kxshmids_len;
 121                 int num;
 122
 123                 kget(X_SHMINFO, &shminfo, sizeof(shminfo));
 124                 kxshmids_len = sizeof(struct shmid_kernel) * shminfo.shmmni;
 125                 kxshmids = malloc(kxshmids_len);
 126                 kget(X_SHMSEGS, kxshmids, kxshmids_len);
 127                 num = shminfo.shmmni;
 128                 while (num-- && !signaled)
 129                         if (kxshmids[num].u.shm_perm.mode & 0x0800) {
 130                                 id = IXSEQ_TO_IPCID(num,
 131                                         kxshmids[num].u.shm_perm);
 132                                 if (shmctl(id, IPC_RMID, NULL) < 0) {
 133                                         if (rmverbose > 1)
 134                                                 warn("shmid(%d): ", id);
 135                                         errflg++;
 136                                 } else
 137                                         if (rmverbose)
 138                                                 printf(
 139                                                     "Removed %s %d\n",
 140                                                     IPC_TO_STRING('M'),
 141                                                     id);
 142                         }
 143                 return signaled ? -1 : 0;       /* errors maybe handled above */
 144         }
 145
 146         if (key) {
 147                 id = shmget(key, 0, 0);
 148                 if (id == -1)
 149                         return -1;
 150         }
 151
 152         return shmctl(id, IPC_RMID, NULL);
 153 }
 154
 155 static int
 156 semrm(key_t key, int id)
 157 {
 158         union semun arg;
 159
 160         if (key == -1 || id == -1) {
 161                 struct semid_kernel *kxsema;
 162                 size_t kxsema_len;
 163                 int num;
 164
 165                 kget(X_SEMINFO, &seminfo, sizeof(seminfo));
 166                 kxsema_len = sizeof(struct semid_kernel) * seminfo.semmni;
 167                 kxsema = malloc(kxsema_len);
 168                 kget(X_SEMA, kxsema, kxsema_len);
 169                 num = seminfo.semmni;
 170                 while (num-- && !signaled)
 171                         if ((kxsema[num].u.sem_perm.mode & SEM_ALLOC) != 0) {
 172                                 id = IXSEQ_TO_IPCID(num,
 173                                         kxsema[num].u.sem_perm);
 174                                 if (semctl(id, 0, IPC_RMID, NULL) < 0) {
 175                                         if (rmverbose > 1)
 176                                                 warn("semid(%d): ", id);
 177                                         errflg++;
 178                                 } else
 179                                         if (rmverbose)
 180                                                 printf(
 181                                                     "Removed %s %d\n",
 182                                                     IPC_TO_STRING('S'),
 183                                                     id);
 184                         }
 185                 return signaled ? -1 : 0;       /* errors maybe handled above */
 186         }
 187
 188         if (key) {
 189                 id = semget(key, 0, 0);
 190                 if (id == -1)
 191                         return -1;
 192         }
 193
 194         return semctl(id, 0, IPC_RMID, arg);
 195 }
 196
 197 static void
 198 not_configured(int signo __unused)
 199 {
 200
 201         signaled++;
 202 }
 203
 204 int
 205 main(int argc, char *argv[])
 206 {
 207         int c, result, target_id;
 208         key_t target_key;
 209
 210         while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
 211
 212                 signaled = 0;
 213                 switch (c) {
 214                 case 'v':
 215                         rmverbose++;
 216                         break;
 217                 case 'y':
 218                         use_sysctl = 0;
 219                         break;
 220                 }
 221         }
 222
 223         optind = 1;
 224         errflg = 0;
 225         signal(SIGSYS, not_configured);
 226         while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
 227
 228                 signaled = 0;
 229                 switch (c) {
 230                 case 'q':
 231                 case 'm':
 232                 case 's':
 233                         target_id = atoi(optarg);
 234                         if (c == 'q')
 235                                 result = msgrm(0, target_id);
 236                         else if (c == 'm')
 237                                 result = shmrm(0, target_id);
 238                         else
 239                                 result = semrm(0, target_id);
 240                         if (result < 0) {
 241                                 errflg++;
 242                                 if (!signaled)
 243                                         warn("%sid(%d): ",
 244                                             IPC_TO_STR(toupper(c)), target_id);
 245                                 else
 246                                         warnx(
 247                                             "%ss are not configured "
 248                                             "in the running kernel",
 249                                             IPC_TO_STRING(toupper(c)));
 250                         }
 251                         break;
 252                 case 'Q':
 253                 case 'M':
 254                 case 'S':
 255                         target_key = atol(optarg);
 256                         if (target_key == IPC_PRIVATE) {
 257                                 warnx("can't remove private %ss",
 258                                     IPC_TO_STRING(c));
 259                                 continue;
 260                         }
 261                         if (c == 'Q')
 262                                 result = msgrm(target_key, 0);
 263                         else if (c == 'M')
 264                                 result = shmrm(target_key, 0);
 265                         else
 266                                 result = semrm(target_key, 0);
 267                         if (result < 0) {
 268                                 errflg++;
 269                                 if (!signaled)
 270                                         warn("%ss(%ld): ",
 271                                             IPC_TO_STR(c), target_key);
 272                                 else
 273                                         warnx("%ss are not configured "
 274                                             "in the running kernel",
 275                                             IPC_TO_STRING(c));
 276                         }
 277                         break;
 278                 case 'v':
 279                 case 'y':
 280                         /* Handled in other getopt() loop */
 281                         break;
 282                 case 'W':
 283                         msgrm(-1, 0);
 284                         shmrm(-1, 0);
 285                         semrm(-1, 0);
 286                         break;
 287                 case ':':
 288                         fprintf(stderr,
 289                             "option -%c requires an argument\n", optopt);
 290                         usage();
 291                 case '?':
 292                         fprintf(stderr, "unrecognized option: -%c\n", optopt);
 293                         usage();
 294                 }
 295         }
 296
 297         if (optind != argc) {
 298                 fprintf(stderr, "unknown argument: %s\n", argv[optind]);
 299                 usage();
 300         }
 301         exit(errflg);
 302 }