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