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ipcrm.c revision 1.3.2.1 
      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  * $Id: ipcrm.c,v 1.3.2.1 1994/08/08 05:51:08 mycroft Exp $
     32  */
     33 
     34 #include <stdio.h>
     35 #include <unistd.h>
     36 #include <err.h>
     37 #include <signal.h>
     38 #include <sys/types.h>
     39 #include <sys/ipc.h>
     40 #include <sys/msg.h>
     41 #include <sys/sem.h>
     42 #include <sys/shm.h>
     43 
     44 #define IPC_TO_STR(x) (x == 'Q' ? "msq" : (x == 'M' ? "shm" : "sem"))
     45 #define IPC_TO_STRING(x) (x == 'Q' ? "message queue" : \
     46 	(x == 'M' ? "shared memory segment" : "semaphore"))
     47 
     48 int signaled;
     49 
     50 void usage()
     51 {
     52         fprintf(stderr, "usage: ipcrm [ [-q msqid] [-m shmid] [-s semid]\n");
     53 	fprintf(stderr, "        [-Q msgkey] [-M shmkey] [-S semkey] ...]\n");
     54 	exit(1);
     55 }
     56 
     57 int msgrm(key, id)
     58     key_t key;
     59     int id;
     60 {
     61     if (key) {
     62 	id = msgget(key, 0);
     63 	if (id == -1)
     64 	    return -1;
     65     }
     66     return msgctl(id, IPC_RMID, NULL);
     67 }
     68 
     69 int shmrm(key, id)
     70     key_t key;
     71     int id;
     72 {
     73     if (key) {
     74 	id = shmget(key, 0, 0);
     75 	if (id == -1)
     76 	    return -1;
     77     }
     78     return shmctl(id, IPC_RMID, NULL);
     79 }
     80 
     81 int semrm(key, id)
     82     key_t key;
     83     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 void not_configured()
     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 
    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 = atoi(optarg);
    118 	    if (c == 'q')
    119 		result = msgrm(0, target_id);
    120 	    else if (c == 'm')
    121 		result = shmrm(0, target_id);
    122 	    else
    123 		result = semrm(0, target_id);
    124 	    if (result < 0) {
    125 		errflg++;
    126 		if (!signaled)
    127 		    warn("%sid(%d): ", IPC_TO_STR(toupper(c)), target_id);
    128 		else
    129 		    warnx("%ss are not configured in the running kernel",
    130 			  IPC_TO_STRING(toupper(c)));
    131 	    }
    132 	    break;
    133 	case 'Q':
    134 	case 'M':
    135 	case 'S':
    136 	    target_key = atol(optarg);
    137 	    if (target_key == IPC_PRIVATE) {
    138 		warnx("can't remove private %ss", IPC_TO_STRING(c));
    139 		continue;
    140 	    }
    141 	    if (c == 'Q')
    142 		result = msgrm(target_key, 0);
    143 	    else if (c == 'M')
    144 		result = shmrm(target_key, 0);
    145 	    else
    146 		result = semrm(target_key, 0);
    147 	    if (result < 0) {
    148 		errflg++;
    149 		if (!signaled)
    150 		    warn("%key(%ld): ", IPC_TO_STR(c), target_key);
    151 		else
    152 		    warnx("%ss are not configured in the running kernel",
    153 			  IPC_TO_STRING(c));
    154 	    }
    155 	    break;
    156 	case ':':
    157 	    fprintf(stderr, "option -%c requires an argument\n", optopt);
    158 	    usage();
    159 	case '?':
    160 	    fprintf(stderr, "unrecognized option: -%c\n", optopt);
    161 	    usage();
    162 	}
    163     }
    164 
    165     if (optind != argc) {
    166 	    fprintf(stderr, "unknown argument: %s\n", argv[optind]);
    167 	    usage();
    168     }
    169     exit(errflg);
    170 }
    171 
    172