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  */
  33
  34 #include <ctype.h>
  35 #include <err.h>
  36 #include <signal.h>
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <unistd.h>
  40 #include <sys/types.h>
  41 #include <sys/ipc.h>
  42 #include <sys/msg.h>
  43 #include <sys/sem.h>
  44 #include <sys/shm.h>
  45
  46 #define IPC_TO_STR(x) (x == 'Q' ? "msq" : (x == 'M' ? "shm" : "sem"))
  47 #define IPC_TO_STRING(x) (x == 'Q' ? "message queue" : \
  48         (x == 'M' ? "shared memory segment" : "semaphore"))
  49
  50 volatile sig_atomic_t  signaled;
  51
  52 static void     usage(void) __dead2;
  53 static int      msgrm(key_t, int);
  54 static int      shmrm(key_t, int);
  55 static int      semrm(key_t, int);
  56 static void     not_configured(int);
  57
  58 static void
  59 usage(void)
  60 {
  61         fprintf(stderr, "%s\n%s\n",
  62                 "usage: ipcrm [-q msqid] [-m shmid] [-s semid]",
  63                 "             [-Q msgkey] [-M shmkey] [-S semkey] ...");
  64         exit(1);
  65 }
  66
  67 static int
  68 msgrm(key_t key, int id)
  69 {
  70     if (key) {
  71         id = msgget(key, 0);
  72         if (id == -1)
  73             return -1;
  74     }
  75     return msgctl(id, IPC_RMID, NULL);
  76 }
  77
  78 static int
  79 shmrm(key_t key, int id)
  80 {
  81     if (key) {
  82         id = shmget(key, 0, 0);
  83         if (id == -1)
  84             return -1;
  85     }
  86     return shmctl(id, IPC_RMID, NULL);
  87 }
  88
  89 static int
  90 semrm(key_t key, int id)
  91 {
  92     union semun arg;
  93
  94     if (key) {
  95         id = semget(key, 0, 0);
  96         if (id == -1)
  97             return -1;
  98     }
  99     return semctl(id, 0, IPC_RMID, arg);
 100 }
 101
 102 static void
 103 not_configured(int signo __unused)
 104 {
 105     signaled++;
 106 }
 107
 108 int
 109 main(int argc, char **argv)
 110 {
 111     int c, result, errflg, target_id;
 112     key_t target_key;
 113
 114     errflg = 0;
 115     signal(SIGSYS, not_configured);
 116     while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) {
 117
 118         signaled = 0;
 119         switch (c) {
 120         case 'q':
 121         case 'm':
 122         case 's':
 123             target_id = atoi(optarg);
 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 = atol(optarg);
 143             if (target_key == IPC_PRIVATE) {
 144                 warnx("can't remove private %ss", IPC_TO_STRING(c));
 145                 continue;
 146             }
 147             if (c == 'Q')
 148                 result = msgrm(target_key, 0);
 149             else if (c == 'M')
 150                 result = shmrm(target_key, 0);
 151             else
 152                 result = semrm(target_key, 0);
 153             if (result < 0) {
 154                 errflg++;
 155                 if (!signaled)
 156                     warn("%s key %ld aborted", IPC_TO_STR(c), target_key);
 157                 else
 158                     warnx("%ss are not configured in the running kernel",
 159                           IPC_TO_STRING(c));
 160             }
 161             break;
 162         case ':':
 163             warnx("option -%c requires an argument\n", optopt);
 164             usage();
 165         case '?':
 166             warnx("unrecognized option: -%c\n", optopt);
 167             usage();
 168         }
 169     }
 170
 171     if (optind != argc) {
 172             warnx("unknown argument: %s\n", argv[optind]);
 173             usage();
 174     }
 175     exit(errflg);
 176 }
 177