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 #ifndef lint
  33 static const char rcsid[] =
  34         "$Id: ipcrm.c,v 1.3 2005/02/03 07:31:33 josborne Exp $";
  35 #endif /* not lint */
  36
  37 #include <ctype.h>
  38 #include <err.h>
  39 #include <signal.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <unistd.h>
  43 #include <sys/types.h>
  44 #include <sys/ipc.h>
  45 #include <sys/msg.h>
  46 #include <sys/sem.h>
  47 #include <sys/shm.h>
  48
  49 #define IPC_TO_STR(x) (x == 'Q' ? "msq" : (x == 'M' ? "shm" : "sem"))
  50 #define IPC_TO_STRING(x) (x == 'Q' ? "message queue" : \
  51         (x == 'M' ? "shared memory segment" : "semaphore"))
  52
  53 int signaled;
  54
  55 void usage()
  56 {
  57         fprintf(stderr, "%s\n%s\n",
  58                 "usage: ipcrm [-q msqid] [-m shmid] [-s semid]",
  59                 "             [-Q msgkey] [-M shmkey] [-S semkey] ...");
  60         exit(1);
  61 }
  62
  63 int msgrm(key, id)
  64     key_t key;
  65     int id;
  66 {
  67     if (key) {
  68         id = msgget(key, 0);
  69         if (id == -1)
  70             return -1;
  71     }
  72     return msgctl(id, IPC_RMID, NULL);
  73 }
  74
  75 int shmrm(key, id)
  76     key_t key;
  77     int id;
  78 {
  79     if (key) {
  80         id = shmget(key, 0, 0);
  81         if (id == -1)
  82             return -1;
  83     }
  84     return shmctl(id, IPC_RMID, NULL);
  85 }
  86
  87 int semrm(key, id)
  88     key_t key;
  89     int id;
  90 {
  91     union semun arg;
  92
  93     if (key) {
  94         id = semget(key, 0, 0);
  95         if (id == -1)
  96             return -1;
  97     }
  98     return semctl(id, 0, IPC_RMID, arg);
  99 }
 100
 101 void not_configured()
 102 {
 103     signaled++;
 104 }
 105
 106 int main(argc, argv)
 107     int argc;
 108     char *argv[];
 109
 110 {
 111     int c, result, errflg, target_id;
 112     key_t target_key;
 113     char *en;
 114
 115     errflg = 0;
 116     signal(SIGSYS, not_configured);
 117     while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) {
 118
 119         signaled = 0;
 120         switch (c) {
 121         case 'q':
 122         case 'm':
 123         case 's':
 124             target_id = strtol(optarg, &en, 0);
 125             if (*en) {
 126                 warnx("%s: '%s' is not a number",
 127                     IPC_TO_STRING(toupper(c)), optarg);
 128                 continue;
 129             }
 130             if (c == 'q')
 131                 result = msgrm(0, target_id);
 132             else if (c == 'm')
 133                 result = shmrm(0, target_id);
 134             else
 135                 result = semrm(0, target_id);
 136             if (result < 0) {
 137                 errflg++;
 138                 if (!signaled)
 139                     warn("%sid(%d): ", IPC_TO_STR(toupper(c)), target_id);
 140                 else
 141                     warnx("%ss are not configured in the running kernel",
 142                           IPC_TO_STRING(toupper(c)));
 143             }
 144             break;
 145         case 'Q':
 146         case 'M':
 147         case 'S':
 148             target_key = strtol(optarg, &en, 0);
 149             if (*en) {
 150                 warnx("%s: '%s' is not a number", IPC_TO_STRING(c), optarg);
 151                 continue;
 152             }
 153             if (target_key == IPC_PRIVATE) {
 154                 warnx("can't remove private %ss", IPC_TO_STRING(c));
 155                 continue;
 156             }
 157             if (c == 'Q')
 158                 result = msgrm(target_key, 0);
 159             else if (c == 'M')
 160                 result = shmrm(target_key, 0);
 161             else
 162                 result = semrm(target_key, 0);
 163             if (result < 0) {
 164                 errflg++;
 165                 if (!signaled)
 166                     warn("%s key(%ld): ", IPC_TO_STRING(c), target_key);
 167                 else
 168                     warnx("%ss are not configured in the running kernel",
 169                           IPC_TO_STRING(c));
 170             }
 171             break;
 172         case ':':
 173             fprintf(stderr, "option -%c requires an argument\n", optopt);
 174             usage();
 175         case '?':
 176             fprintf(stderr, "unrecognized option: -%c\n", optopt);
 177             usage();
 178         }
 179     }
 180
 181     if (optind != argc) {
 182             fprintf(stderr, "unknown argument: %s\n", argv[optind]);
 183             usage();
 184     }
 185     exit(errflg);
 186 }