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 1.2.30.1 2005/02/26 03:36:38 nicolai 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 #if 0
  46 #include <sys/msg.h>
  47 #include <sys/sem.h>
  48 #endif
  49 #include <sys/shm.h>
  50
  51 #define IPC_TO_STR(x) (x == 'Q' ? "msq" : (x == 'M' ? "shm" : "sem"))
  52 #define IPC_TO_STRING(x) (x == 'Q' ? "message queue" : \
  53         (x == 'M' ? "shared memory segment" : "semaphore"))
  54
  55 int signaled;
  56
  57 void usage()
  58 {
  59         fprintf(stderr, "%s\n%s\n",
  60                 "usage: ipcrm [-q msqid] [-m shmid] [-s semid]",
  61                 "             [-Q msgkey] [-M shmkey] [-S semkey] ...");
  62         exit(1);
  63 }
  64
  65 int msgrm(key, id)
  66     key_t key;
  67     int id;
  68 {
  69 #if 0
  70     if (key) {
  71         id = msgget(key, 0);
  72         if (id == -1)
  73             return -1;
  74     }
  75 #endif
  76     return msgctl(id, IPC_RMID, NULL);
  77 }
  78
  79 int shmrm(key, id)
  80     key_t key;
  81     int id;
  82 {
  83     if (key) {
  84         id = shmget(key, 0, 0);
  85         if (id == -1)
  86             return -1;
  87     }
  88     return shmctl(id, IPC_RMID, NULL);
  89 }
  90
  91 int semrm(key, id)
  92     key_t key;
  93     int id;
  94 {
  95 #if 0
  96     union semun arg;
  97
  98     if (key) {
  99         id = semget(key, 0, 0);
 100         if (id == -1)
 101             return -1;
 102     }
 103     return semctl(id, 0, IPC_RMID, arg);
 104 #endif
 105 }
 106
 107 void not_configured()
 108 {
 109     signaled++;
 110 }
 111
 112 int main(argc, argv)
 113     int argc;
 114     char *argv[];
 115
 116 {
 117     int c, result, errflg, target_id;
 118     key_t target_key;
 119
 120     errflg = 0;
 121     signal(SIGSYS, not_configured);
 122     while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) {
 123
 124         signaled = 0;
 125         switch (c) {
 126         case 'q':
 127         case 'm':
 128         case 's':
 129             target_id = atoi(optarg);
 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 = atol(optarg);
 149             if (target_key == IPC_PRIVATE) {
 150                 warnx("can't remove private %ss", IPC_TO_STRING(c));
 151                 continue;
 152             }
 153             if (c == 'Q')
 154                 result = msgrm(target_key, 0);
 155             else if (c == 'M')
 156                 result = shmrm(target_key, 0);
 157             else
 158                 result = semrm(target_key, 0);
 159             if (result < 0) {
 160                 errflg++;
 161                 if (!signaled)
 162                     warn("%key(%ld): ", IPC_TO_STR(c), target_key);
 163                 else
 164                     warnx("%ss are not configured in the running kernel",
 165                           IPC_TO_STRING(c));
 166             }
 167             break;
 168         case ':':
 169             fprintf(stderr, "option -%c requires an argument\n", optopt);
 170             usage();
 171         case '?':
 172             fprintf(stderr, "unrecognized option: -%c\n", optopt);
 173             usage();
 174         }
 175     }
 176
 177     if (optind != argc) {
 178             fprintf(stderr, "unknown argument: %s\n", argv[optind]);
 179             usage();
 180     }
 181     exit(errflg);
 182 }
 183