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 static void usage(void)
  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 static int msgrm(key_t key, int id)
  64 {
  65     if (key) {
  66         id = msgget(key, 0);
  67         if (id == -1)
  68             return -1;
  69     }
  70     return msgctl(id, IPC_RMID, NULL);
  71 }
  72
  73 static int shmrm(key_t key, int id)
  74 {
  75     if (key) {
  76         id = shmget(key, 0, 0);
  77         if (id == -1)
  78             return -1;
  79     }
  80     return shmctl(id, IPC_RMID, NULL);
  81 }
  82
  83 static int semrm(key_t key, int id)
  84 {
  85     union semun arg;
  86
  87     if (key) {
  88         id = semget(key, 0, 0);
  89         if (id == -1)
  90             return -1;
  91     }
  92     return semctl(id, 0, IPC_RMID, arg);
  93 }
  94
  95 static void not_configured(__unused int unused)
  96 {
  97     signaled++;
  98 }
  99
 100 int main(argc, argv)
 101     int argc;
 102     char *argv[];
 103
 104 {
 105     int c, result, errflg, target_id;
 106     key_t target_key;
 107     char *en;
 108
 109     errflg = 0;
 110     signal(SIGSYS, not_configured);
 111     while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) {
 112
 113         signaled = 0;
 114         switch (c) {
 115         case 'q':
 116         case 'm':
 117         case 's':
 118             target_id = (int)strtol(optarg, &en, 0);
 119             if (*en) {
 120                 warnx("%s: '%s' is not a number",
 121                     IPC_TO_STRING(toupper(c)), optarg);
 122                 continue;
 123             }
 124             if (c == 'q')
 125                 result = msgrm(0, target_id);
 126             else if (c == 'm')
 127                 result = shmrm(0, target_id);
 128             else
 129                 result = semrm(0, target_id);
 130             if (result < 0) {
 131                 errflg++;
 132                 if (!signaled)
 133                     warn("%sid(%d): ", IPC_TO_STR(toupper(c)), target_id);
 134                 else
 135                     warnx("%ss are not configured in the running kernel",
 136                           IPC_TO_STRING(toupper(c)));
 137             }
 138             break;
 139         case 'Q':
 140         case 'M':
 141         case 'S':
 142             target_key = (key_t)strtol(optarg, &en, 0);
 143             if (*en) {
 144                 warnx("%s: '%s' is not a number", IPC_TO_STRING(c), optarg);
 145                 continue;
 146             }
 147             if (target_key == IPC_PRIVATE) {
 148                 warnx("can't remove private %ss", IPC_TO_STRING(c));
 149                 continue;
 150             }
 151             if (c == 'Q')
 152                 result = msgrm(target_key, 0);
 153             else if (c == 'M')
 154                 result = shmrm(target_key, 0);
 155             else
 156                 result = semrm(target_key, 0);
 157             if (result < 0) {
 158                 errflg++;
 159                 if (!signaled)
 160                     warn("%s key(%d): ", IPC_TO_STRING(c), target_key);
 161                 else
 162                     warnx("%ss are not configured in the running kernel",
 163                           IPC_TO_STRING(c));
 164             }
 165             break;
 166         case ':':
 167             fprintf(stderr, "option -%c requires an argument\n", optopt);
 168             usage();
 169         case '?':
 170             fprintf(stderr, "unrecognized option: -%c\n", optopt);
 171             usage();
 172         }
 173     }
 174
 175     if (optind != argc) {
 176             fprintf(stderr, "unknown argument: %s\n", argv[optind]);
 177             usage();
 178     }
 179     exit(errflg);
 180 }