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ipcrm.c revision 1.11 
      1 /*	$NetBSD: ipcrm.c,v 1.11 1999/08/26 07:18:10 hwr 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 #include <sys/types.h>
     35 #include <sys/ipc.h>
     36 #include <sys/msg.h>
     37 #include <sys/sem.h>
     38 #include <sys/shm.h>
     39 
     40 #include <stdio.h>
     41 #include <stdlib.h>
     42 #include <unistd.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 __P((void));
     54 int	msgrm __P((key_t, int));
     55 int	shmrm __P((key_t, int));
     56 int	semrm __P((key_t, int));
     57 void	not_configured __P((void));
     58 int	main __P((int, char *[]));
     59 
     60 void
     61 usage()
     62 {
     63 	fprintf(stderr, "usage: ipcrm [ [-q msqid] [-m shmid] [-s semid]\n");
     64 	fprintf(stderr, "        [-Q msgkey] [-M shmkey] [-S semkey] ...]\n");
     65 	exit(1);
     66 }
     67 
     68 int
     69 msgrm(key, id)
     70 	key_t   key;
     71 	int     id;
     72 {
     73 	if (key) {
     74 		id = msgget(key, 0);
     75 		if (id == -1)
     76 			return -1;
     77 	}
     78 	return msgctl(id, IPC_RMID, NULL);
     79 }
     80 
     81 int
     82 shmrm(key, id)
     83 	key_t   key;
     84 	int     id;
     85 {
     86 	if (key) {
     87 		id = shmget(key, 0, 0);
     88 		if (id == -1)
     89 			return -1;
     90 	}
     91 	return shmctl(id, IPC_RMID, NULL);
     92 }
     93 
     94 int
     95 semrm(key, id)
     96 	key_t   key;
     97 	int     id;
     98 {
     99 
    100 	if (key) {
    101 		id = semget(key, 0, 0);
    102 		if (id == -1)
    103 			return -1;
    104 	}
    105 	return semctl(id, 0, IPC_RMID, NULL);
    106 }
    107 
    108 void
    109 not_configured()
    110 {
    111 	signaled++;
    112 }
    113 
    114 int
    115 main(argc, argv)
    116 	int     argc;
    117 	char   *argv[];
    118 
    119 {
    120 	int     c, result, errflg, target_id;
    121 	key_t   target_key;
    122 
    123 	errflg = 0;
    124 	signal(SIGSYS, (void (*) __P((int))) not_configured);
    125 	while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) {
    126 
    127 		signaled = 0;
    128 		switch (c) {
    129 		case 'q':
    130 		case 'm':
    131 		case 's':
    132 			target_id = atoi(optarg);
    133 			if (c == 'q')
    134 				result = msgrm(0, target_id);
    135 			else
    136 				if (c == 'm')
    137 					result = shmrm(0, target_id);
    138 				else
    139 					result = semrm(0, target_id);
    140 			if (result < 0) {
    141 				errflg++;
    142 				if (!signaled)
    143 					warn("%sid(%d): ",
    144 					    IPC_TO_STR(toupper(c)), target_id);
    145 				else
    146 					warnx("%ss are not configured in "
    147 					    "the running kernel",
    148 					    IPC_TO_STRING(toupper(c)));
    149 			}
    150 			break;
    151 		case 'Q':
    152 		case 'M':
    153 		case 'S':
    154 			target_key = atol(optarg);
    155 			if (target_key == IPC_PRIVATE) {
    156 				warnx("can't remove private %ss",
    157 				    IPC_TO_STRING(c));
    158 				continue;
    159 			}
    160 			if (c == 'Q')
    161 				result = msgrm(target_key, 0);
    162 			else
    163 				if (c == 'M')
    164 					result = shmrm(target_key, 0);
    165 				else
    166 					result = semrm(target_key, 0);
    167 			if (result < 0) {
    168 				errflg++;
    169 				if (!signaled)
    170 					warn("%skey(%ld): ",
    171 					    IPC_TO_STR(c), (long) target_key);
    172 				else
    173 					warnx("%ss are not configured "
    174 					    "in the running kernel",
    175 					    IPC_TO_STRING(c));
    176 			}
    177 			break;
    178 		case ':':
    179 			fprintf(stderr, "option -%c requires an argument\n",
    180 			    optopt);
    181 			usage();
    182 		case '?':
    183 			fprintf(stderr, "unrecognized option: -%c\n", optopt);
    184 			usage();
    185 		}
    186 	}
    187 
    188 	if (optind != argc) {
    189 		fprintf(stderr, "unknown argument: %s\n", argv[optind]);
    190 		usage();
    191 	}
    192 	exit(errflg);
    193 }
    194