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ipcrm.c revision 1.3 
      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. The name of the Author may not be used to endorse or promote products
     11  *    derived from this software without specific prior written permission.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY Adam Glass ``AS IS'' AND
     14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     16  * ARE DISCLAIMED.  IN NO EVENT SHALL Adam Glass BE LIABLE
     17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     23  * SUCH DAMAGE.
     24  *
     25  * $Id: ipcrm.c,v 1.3 1994/05/11 07:43:59 cgd Exp $
     26  */
     27 
     28 #include <stdio.h>
     29 #include <unistd.h>
     30 #include <err.h>
     31 #include <signal.h>
     32 #include <sys/types.h>
     33 #include <sys/ipc.h>
     34 #include <sys/msg.h>
     35 #include <sys/sem.h>
     36 #ifndef NOSHM
     37 #include <sys/shm.h>
     38 #endif
     39 
     40 #define IPC_TO_STR(x) (x == 'Q' ? "msq" : (x == 'M' ? "shm" : "sem"))
     41 #define IPC_TO_STRING(x) (x == 'Q' ? "message queue" : \
     42 	(x == 'M' ? "shared memory segment" : "semaphore"))
     43 
     44 int signaled;
     45 
     46 int msgrm(key, id)
     47     key_t key;
     48     int id;
     49 {
     50     if (key) {
     51 	id = msgget(key, 0);
     52 	if (id == -1)
     53 	    return -1;
     54     }
     55     return msgctl(id, IPC_RMID, NULL);
     56 }
     57 
     58 #ifndef NOSHM
     59 int shmrm(key, id)
     60     key_t key;
     61     int id;
     62 {
     63     if (key) {
     64 	id = shmget(key, 0, 0);
     65 	if (id == -1)
     66 	    return -1;
     67     }
     68     return shmctl(id, IPC_RMID, NULL);
     69 }
     70 #endif
     71 
     72 int semrm(key, id)
     73     key_t key;
     74     int id;
     75 {
     76     union semun arg;
     77 
     78     if (key) {
     79 	id = semget(key, 0, 0);
     80 	if (id == -1)
     81 	    return -1;
     82     }
     83     return semctl(id, 0, IPC_RMID, arg);
     84 }
     85 
     86 void not_configured()
     87 {
     88     signaled++;
     89 }
     90 
     91 int main(argc, argv)
     92     int argc;
     93     char *argv[];
     94 
     95 {
     96     int c, result, errflg, target_id;
     97     key_t target_key;
     98 
     99     errflg = 0;
    100     signal(SIGSYS, not_configured);
    101     while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) {
    102 
    103 	signaled = 0;
    104 	switch (c) {
    105 	case 'q':
    106 	case 'm':
    107 	case 's':
    108 	    target_id = atoi(optarg);
    109 	    if (c == 'q')
    110 		result = msgrm(0, target_id);
    111 #ifndef NOSHM
    112 	    else if (c == 'm')
    113 		result = shmrm(0, target_id);
    114 #endif
    115 	    else
    116 		result = semrm(0, target_id);
    117 	    if (result < 0) {
    118 		errflg++;
    119 		if (!signaled)
    120 		    warn("%sid(%d): ", IPC_TO_STR(toupper(c)), target_id);
    121 		else
    122 		    warnx("%ss are not configured in the running kernel",
    123 			  IPC_TO_STRING(toupper(c)));
    124 	    }
    125 	    break;
    126 	case 'Q':
    127 	case 'M':
    128 	case 'S':
    129 	    target_key = atol(optarg);
    130 	    if (target_key == IPC_PRIVATE) {
    131 		warnx("can't remove private %ss", IPC_TO_STRING(c));
    132 		continue;
    133 	    }
    134 	    if (c == 'Q')
    135 		result = msgrm(target_key, 0);
    136 #ifndef NOSHM
    137 	    else if (c == 'M')
    138 		result = shmrm(target_key, 0);
    139 #endif
    140 	    else
    141 		result = semrm(target_key, 0);
    142 	    if (result < 0) {
    143 		errflg++;
    144 		if (!signaled)
    145 		    warn("%key(%ld): ", IPC_TO_STR(c), target_key);
    146 		else
    147 		    warnx("%ss are not configured in the running kernel",
    148 			  IPC_TO_STRING(c));
    149 	    }
    150 	    break;
    151 	case ':':
    152 	    errx(1, "option -%c requires an argument", optopt);
    153 	case '?':
    154 	    errx(1, "unrecognized option: -%c", optopt);
    155 	}
    156     }
    157     if (optind != argc) {
    158 	fprintf(stderr, "usage: ipcrm [ [-q msqid] [-m shmid] [-s semid]\n");
    159 	fprintf(stderr, "        [-Q msgkey] [-M shmkey] [-S semkey] ...]\n");
    160 	exit(1);
    161     }
    162     exit(errflg);
    163 }
    164 
    165