usr.bin/ipcrm/ipcrm.c

   1 /*
   2  * Copyright (c) 1994 Adam Glass
   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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Adam Glass.
  16  * 4. The name of the Author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY Adam Glass ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL Adam Glass BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <sys/param.h>
  37 #define _KERNEL
  38 #include <sys/sem.h>
  39 #include <sys/shm.h>
  40 #include <sys/msg.h>
  41 #undef _KERNEL
  42
  43 #include <ctype.h>
  44 #include <err.h>
  45 #include <grp.h>
  46 #include <kvm.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <unistd.h>
  50
  51 #include "ipc.h"
  52
  53 int     signaled;
  54 int     errflg;
  55 int     rmverbose = 0;
  56
  57 void    usage(void);
  58
  59 int     msgrm(key_t, int);
  60 int     shmrm(key_t, int);
  61 int     semrm(key_t, int);
  62 void    not_configured(int);
  63
  64 void
  65 usage(void)
  66 {
  67
  68         fprintf(stderr,
  69             "usage: ipcrm [-W] [-v[v]]\n"
  70             "             [-q msqid] [-m shmid] [-s semid]\n"
  71             "             [-Q msgkey] [-M shmkey] [-S semkey] ...\n");
  72         exit(1);
  73 }
  74
  75 int
  76 msgrm(key_t key, int id)
  77 {
  78
  79         if (key == -1 || id == -1) {
  80                 struct msqid_kernel *kxmsqids;
  81                 size_t kxmsqids_len;
  82                 int num;
  83
  84                 kget(X_MSGINFO, &msginfo, sizeof(msginfo));
  85                 kxmsqids_len = sizeof(struct msqid_kernel) * msginfo.msgmni;
  86                 kxmsqids = malloc(kxmsqids_len);
  87                 kget(X_MSQIDS, kxmsqids, kxmsqids_len);
  88                 num = msginfo.msgmni;
  89                 while (num-- && !signaled)
  90                         if (kxmsqids[num].u.msg_qbytes != 0) {
  91                                 id = IXSEQ_TO_IPCID(num,
  92                                         kxmsqids[num].u.msg_perm);
  93                                 if (msgctl(id, IPC_RMID, NULL) < 0) {
  94                                         if (rmverbose > 1)
  95                                                 warn("msqid(%d): ", id);
  96                                         errflg++;
  97                                 } else
  98                                         if (rmverbose)
  99                                                 printf(
 100                                                     "Removed %s %d\n",
 101                                                     IPC_TO_STRING('Q'),
 102                                                     id);
 103                         }
 104                 return signaled ? -1 : 0;       /* errors maybe handled above */
 105         }
 106
 107         if (key) {
 108                 id = msgget(key, 0);
 109                 if (id == -1)
 110                         return -1;
 111         }
 112
 113         return msgctl(id, IPC_RMID, NULL);
 114 }
 115
 116 int
 117 shmrm(key_t key, int id)
 118 {
 119
 120         if (key == -1 || id == -1) {
 121                 struct shmid_kernel *kxshmids;
 122                 size_t kxshmids_len;
 123                 int num;
 124
 125                 kget(X_SHMINFO, &shminfo, sizeof(shminfo));
 126                 kxshmids_len = sizeof(struct shmid_kernel) * shminfo.shmmni;
 127                 kxshmids = malloc(kxshmids_len);
 128                 kget(X_SHMSEGS, kxshmids, kxshmids_len);
 129                 num = shminfo.shmmni;
 130                 while (num-- && !signaled)
 131                         if (kxshmids[num].u.shm_perm.mode & 0x0800) {
 132                                 id = IXSEQ_TO_IPCID(num,
 133                                         kxshmids[num].u.shm_perm);
 134                                 if (shmctl(id, IPC_RMID, NULL) < 0) {
 135                                         if (rmverbose > 1)
 136                                                 warn("shmid(%d): ", id);
 137                                         errflg++;
 138                                 } else
 139                                         if (rmverbose)
 140                                                 printf(
 141                                                     "Removed %s %d\n",
 142                                                     IPC_TO_STRING('M'),
 143                                                     id);
 144                         }
 145                 return signaled ? -1 : 0;       /* errors maybe handled above */
 146         }
 147
 148         if (key) {
 149                 id = shmget(key, 0, 0);
 150                 if (id == -1)
 151                         return -1;
 152         }
 153
 154         return shmctl(id, IPC_RMID, NULL);
 155 }
 156
 157 int
 158 semrm(key_t key, int id)
 159 {
 160         union semun arg;
 161
 162         if (key == -1 || id == -1) {
 163                 struct semid_kernel *kxsema;
 164                 size_t kxsema_len;
 165                 int num;
 166
 167                 kget(X_SEMINFO, &seminfo, sizeof(seminfo));
 168                 kxsema_len = sizeof(struct semid_kernel) * seminfo.semmni;
 169                 kxsema = malloc(kxsema_len);
 170                 kget(X_SEMA, kxsema, kxsema_len);
 171                 num = seminfo.semmni;
 172                 while (num-- && !signaled)
 173                         if ((kxsema[num].u.sem_perm.mode & SEM_ALLOC) != 0) {
 174                                 id = IXSEQ_TO_IPCID(num,
 175                                         kxsema[num].u.sem_perm);
 176                                 if (semctl(id, IPC_RMID, NULL) < 0) {
 177                                         if (rmverbose > 1)
 178                                                 warn("semid(%d): ", id);
 179                                         errflg++;
 180                                 } else
 181                                         if (rmverbose)
 182                                                 printf(
 183                                                     "Removed %s %d\n",
 184                                                     IPC_TO_STRING('S'),
 185                                                     id);
 186                         }
 187                 return signaled ? -1 : 0;       /* errors maybe handled above */
 188         }
 189
 190         if (key) {
 191                 id = semget(key, 0, 0);
 192                 if (id == -1)
 193                         return -1;
 194         }
 195
 196         return semctl(id, 0, IPC_RMID, arg);
 197 }
 198
 199 void
 200 not_configured(int signo __unused)
 201 {
 202
 203         signaled++;
 204 }
 205
 206 int
 207 main(int argc, char *argv[])
 208 {
 209         int c, result, target_id;
 210         key_t target_key;
 211
 212         while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
 213
 214                 signaled = 0;
 215                 switch (c) {
 216                 case 'v':
 217                         rmverbose++;
 218                         break;
 219                 case 'y':
 220                         use_sysctl = 0;
 221                         break;
 222                 }
 223         }
 224
 225         optind = 1;
 226         errflg = 0;
 227         signal(SIGSYS, not_configured);
 228         while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
 229
 230                 signaled = 0;
 231                 switch (c) {
 232                 case 'q':
 233                 case 'm':
 234                 case 's':
 235                         target_id = atoi(optarg);
 236                         if (c == 'q')
 237                                 result = msgrm(0, target_id);
 238                         else if (c == 'm')
 239                                 result = shmrm(0, target_id);
 240                         else
 241                                 result = semrm(0, target_id);
 242                         if (result < 0) {
 243                                 errflg++;
 244                                 if (!signaled)
 245                                         warn("%sid(%d): ",
 246                                             IPC_TO_STR(toupper(c)), target_id);
 247                                 else
 248                                         warnx(
 249                                             "%ss are not configured "
 250                                             "in the running kernel",
 251                                             IPC_TO_STRING(toupper(c)));
 252                         }
 253                         break;
 254                 case 'Q':
 255                 case 'M':
 256                 case 'S':
 257                         target_key = atol(optarg);
 258                         if (target_key == IPC_PRIVATE) {
 259                                 warnx("can't remove private %ss",
 260                                     IPC_TO_STRING(c));
 261                                 continue;
 262                         }
 263                         if (c == 'Q')
 264                                 result = msgrm(target_key, 0);
 265                         else if (c == 'M')
 266                                 result = shmrm(target_key, 0);
 267                         else
 268                                 result = semrm(target_key, 0);
 269                         if (result < 0) {
 270                                 errflg++;
 271                                 if (!signaled)
 272                                         warn("%ss(%ld): ",
 273                                             IPC_TO_STR(c), target_key);
 274                                 else
 275                                         warnx("%ss are not configured "
 276                                             "in the running kernel",
 277                                             IPC_TO_STRING(c));
 278                         }
 279                         break;
 280                 case 'v':
 281                 case 'y':
 282                         /* Handled in other getopt() loop */
 283                         break;
 284                 case 'W':
 285                         msgrm(-1, 0);
 286                         shmrm(-1, 0);
 287                         semrm(-1, 0);
 288                         break;
 289                 case ':':
 290                         fprintf(stderr,
 291                             "option -%c requires an argument\n", optopt);
 292                         usage();
 293                 case '?':
 294                         fprintf(stderr, "unrecognized option: -%c\n", optopt);
 295                         usage();
 296                 }
 297         }
 298
 299         if (optind != argc) {
 300                 fprintf(stderr, "unknown argument: %s\n", argv[optind]);
 301                 usage();
 302         }
 303         exit(errflg);
 304 }