usr.bin/ipcrm/ipcrm.c

   1 /*      $OpenBSD: ipcrm.c,v 1.10 2005/12/19 19:13:50 millert Exp $*/
   2
   3 /*
   4  * Copyright (c) 1994 Adam Glass
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Adam Glass.
  18  * 4. The name of the Author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY Adam Glass ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL Adam Glass BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  */
  34
  35 #include <sys/types.h>
  36 #include <sys/ipc.h>
  37 #include <sys/msg.h>
  38 #include <sys/sem.h>
  39 #include <sys/shm.h>
  40 #include <stdio.h>
  41 #include <unistd.h>
  42 #include <stdlib.h>
  43 #include <ctype.h>
  44 #include <err.h>
  45 #include <signal.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 int signaled;
  52
  53 void    usage(void);
  54 int     msgrm(key_t, int);
  55 int     shmrm(key_t, int);
  56 int     semrm(key_t, int);
  57 void    not_configured(int);
  58
  59 void
  60 usage(void)
  61 {
  62         extern char *__progname;
  63         fprintf(stderr, "usage: %s [-M shmkey] [-m shmid] [-Q msgkey]\n"
  64                         "         [-q msqid] [-S semkey] [-s semid] ...\n",
  65                 __progname);
  66         exit(1);
  67 }
  68
  69 int
  70 msgrm(key_t key, int id)
  71 {
  72         if (key) {
  73                 id = msgget(key, 0);
  74                 if (id == -1)
  75                         return (-1);
  76         }
  77         return (msgctl(id, IPC_RMID, NULL));
  78 }
  79
  80 int
  81 shmrm(key_t key, int id)
  82 {
  83         if (key) {
  84                 id = shmget(key, 0, 0);
  85                 if (id == -1)
  86                         return (-1);
  87         }
  88         return (shmctl(id, IPC_RMID, NULL));
  89 }
  90
  91 int
  92 semrm(key_t key, int id)
  93 {
  94         union semun arg;
  95
  96         if (key) {
  97                 id = semget(key, 0, 0);
  98                 if (id == -1)
  99                         return (-1);
 100         }
 101         return (semctl(id, 0, IPC_RMID, arg));
 102 }
 103
 104 /* ARGSUSED */
 105 void
 106 not_configured(int signo)
 107 {
 108         signaled++;
 109 }
 110
 111 int
 112 main(int argc, char *argv[])
 113 {
 114         int c, result, errflg, target_id;
 115         key_t target_key;
 116
 117         errflg = 0;
 118         signal(SIGSYS, not_configured);
 119         while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) {
 120                 signaled = 0;
 121                 switch (c) {
 122                 case 'q':
 123                 case 'm':
 124                 case 's':
 125                         target_id = atoi(optarg);
 126                         if (c == 'q')
 127                                 result = msgrm(0, target_id);
 128                         else if (c == 'm')
 129                                 result = shmrm(0, target_id);
 130                         else
 131                                 result = semrm(0, target_id);
 132                         if (result < 0) {
 133                                 errflg++;
 134                                 if (!signaled)
 135                                         warn("%sid(%d)",
 136                                             IPC_TO_STR(toupper(c)), target_id);
 137                                 else
 138                                         warnx("%ss are not configured in the running kernel",
 139                                             IPC_TO_STRING(toupper(c)));
 140                         }
 141                         break;
 142                 case 'Q':
 143                 case 'M':
 144                 case 'S':
 145                         target_key = atol(optarg);
 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("%skey(%ld)", IPC_TO_STR(c),
 160                                             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                         warnx("option -%c requires an argument", optopt);
 168                         usage();
 169                 default:
 170                         warnx("unrecognized option: -%c", optopt);
 171                         usage();
 172                 }
 173         }
 174
 175         if (optind != argc) {
 176                 warnx("unknown argument: %s", argv[optind]);
 177                 usage();
 178         }
 179         exit(errflg);
 180 }