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     if (key) {
  87         id = semget(key, 0, 0);
  88         if (id == -1)
  89             return -1;
  90     }
  91     return semctl(id, 0, IPC_RMID);
  92 }
  93
  94 static void not_configured(__unused int unused)
  95 {
  96     signaled++;
  97 }
  98
  99 int main(argc, argv)
 100     int argc;
 101     char *argv[];
 102
 103 {
 104     int c, result, errflg, target_id;
 105     key_t target_key;
 106     char *en;
 107
 108     errflg = 0;
 109     signal(SIGSYS, not_configured);
 110     while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) {
 111
 112         signaled = 0;
 113         switch (c) {
 114         case 'q':
 115         case 'm':
 116         case 's':
 117             target_id = (int)strtol(optarg, &en, 0);
 118             if (*en) {
 119                 warnx("%s: '%s' is not a number",
 120                     IPC_TO_STRING(toupper(c)), optarg);
 121                 continue;
 122             }
 123             if (c == 'q')
 124                 result = msgrm(0, target_id);
 125             else if (c == 'm')
 126                 result = shmrm(0, target_id);
 127             else
 128                 result = semrm(0, target_id);
 129             if (result < 0) {
 130                 errflg++;
 131                 if (!signaled)
 132                     warn("%sid(%d): ", IPC_TO_STR(toupper(c)), target_id);
 133                 else
 134                     warnx("%ss are not configured in the running kernel",
 135                           IPC_TO_STRING(toupper(c)));
 136             }
 137             break;
 138         case 'Q':
 139         case 'M':
 140         case 'S':
 141             target_key = (key_t)strtol(optarg, &en, 0);
 142             if (*en) {
 143                 warnx("%s: '%s' is not a number", IPC_TO_STRING(c), optarg);
 144                 continue;
 145             }
 146             if (target_key == IPC_PRIVATE) {
 147                 warnx("can't remove private %ss", IPC_TO_STRING(c));
 148                 continue;
 149             }
 150             if (c == 'Q')
 151                 result = msgrm(target_key, 0);
 152             else if (c == 'M')
 153                 result = shmrm(target_key, 0);
 154             else
 155                 result = semrm(target_key, 0);
 156             if (result < 0) {
 157                 errflg++;
 158                 if (!signaled)
 159                     warn("%s key(%d): ", IPC_TO_STRING(c), target_key);
 160                 else
 161                     warnx("%ss are not configured in the running kernel",
 162                           IPC_TO_STRING(c));
 163             }
 164             break;
 165         case ':':
 166             fprintf(stderr, "option -%c requires an argument\n", optopt);
 167             usage();
 168         case '?':
 169             fprintf(stderr, "unrecognized option: -%c\n", optopt);
 170             usage();
 171         }
 172     }
 173
 174     if (optind != argc) {
 175             fprintf(stderr, "unknown argument: %s\n", argv[optind]);
 176             usage();
 177     }
 178     exit(errflg);
 179 }