usr.bin/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  * $FreeBSD: src/usr.bin/ipcrm/ipcrm.c,v 1.6 1999/08/28 01:02:14 peter Exp $
  32  * $DragonFly: src/usr.bin/ipcrm/ipcrm.c,v 1.4 2004/11/19 18:35:29 liamfoy Exp $
  33  */
  34
  35 #include <ctype.h>
  36 #include <err.h>
  37 #include <signal.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <unistd.h>
  41 #include <sys/types.h>
  42 #include <sys/ipc.h>
  43 #include <sys/msg.h>
  44 #include <sys/sem.h>
  45 #include <sys/shm.h>
  46
  47 #define IPC_TO_STR(x) (x == 'Q' ? "msq" : (x == 'M' ? "shm" : "sem"))
  48 #define IPC_TO_STRING(x) (x == 'Q' ? "message queue" : \
  49         (x == 'M' ? "shared memory segment" : "semaphore"))
  50
  51 volatile sig_atomic_t  signaled;
  52
  53 static void     usage(void);
  54 static int      msgrm(key_t, int);
  55 static int      shmrm(key_t, int);
  56 static int      semrm(key_t, int);
  57 static void     not_configured(int);
  58
  59 static void
  60 usage(void)
  61 {
  62         fprintf(stderr, "%s\n%s\n",
  63                 "usage: ipcrm [-q msqid] [-m shmid] [-s semid]",
  64                 "             [-Q msgkey] [-M shmkey] [-S semkey] ...");
  65         exit(1);
  66 }
  67
  68 static int
  69 msgrm(key_t key, int id)
  70 {
  71     if (key) {
  72         id = msgget(key, 0);
  73         if (id == -1)
  74             return -1;
  75     }
  76     return msgctl(id, IPC_RMID, NULL);
  77 }
  78
  79 static int
  80 shmrm(key_t key, int id)
  81 {
  82     if (key) {
  83         id = shmget(key, 0, 0);
  84         if (id == -1)
  85             return -1;
  86     }
  87     return shmctl(id, IPC_RMID, NULL);
  88 }
  89
  90 static int
  91 semrm(key_t key, int id)
  92 {
  93     union semun arg;
  94
  95     if (key) {
  96         id = semget(key, 0, 0);
  97         if (id == -1)
  98             return -1;
  99     }
 100     return semctl(id, 0, IPC_RMID, arg);
 101 }
 102
 103 static void
 104 not_configured(int signo __unused)
 105 {
 106     signaled++;
 107 }
 108
 109 int
 110 main(int argc, char **argv)
 111 {
 112     int c, result, errflg, target_id;
 113     key_t target_key;
 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 = atoi(optarg);
 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 = atol(optarg);
 144             if (target_key == IPC_PRIVATE) {
 145                 warnx("can't remove private %ss", IPC_TO_STRING(c));
 146                 continue;
 147             }
 148             if (c == 'Q')
 149                 result = msgrm(target_key, 0);
 150             else if (c == 'M')
 151                 result = shmrm(target_key, 0);
 152             else
 153                 result = semrm(target_key, 0);
 154             if (result < 0) {
 155                 errflg++;
 156                 if (!signaled)
 157                     warn("%s key %ld aborted", IPC_TO_STR(c), target_key);
 158                 else
 159                     warnx("%ss are not configured in the running kernel",
 160                           IPC_TO_STRING(c));
 161             }
 162             break;
 163         case ':':
 164             warnx("option -%c requires an argument\n", optopt);
 165             usage();
 166         case '?':
 167             warnx("unrecognized option: -%c\n", optopt);
 168             usage();
 169         }
 170     }
 171
 172     if (optind != argc) {
 173             warnx("unknown argument: %s\n", argv[optind]);
 174             usage();
 175     }
 176     exit(errflg);
 177 }
 178