ipcrm.c revision 1.3 
1/*	$OpenBSD: ipcrm.c,v 1.3 1997/09/11 07:59:01 deraadt 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
51int signaled;
52
53void	usage __P((void));
54int	msgrm __P((key_t, int));
55int	shmrm __P((key_t, int));
56int	semrm __P((key_t, int));
57void	not_configured __P((int));
58
59void
60usage()
61{
62        fprintf(stderr, "usage: ipcrm [ [-q msqid] [-m shmid] [-s semid]\n");
63	fprintf(stderr, "        [-Q msgkey] [-M shmkey] [-S semkey] ...]\n");
64	exit(1);
65}
66
67int
68msgrm(key, id)
69	key_t key;
70	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
80int
81shmrm(key, id)
82	key_t key;
83	int id;
84{
85	if (key) {
86		id = shmget(key, 0, 0);
87		if (id == -1)
88			return (-1);
89	    }
90	return (shmctl(id, IPC_RMID, NULL));
91}
92
93int
94semrm(key, id)
95	key_t key;
96	int id;
97{
98	union semun arg;
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, arg));
106}
107
108void
109not_configured(sig)
110	int sig;
111{
112	signaled++;
113}
114
115int
116main(argc, argv)
117	int argc;
118	char *argv[];
119{
120	int c, result, errflg, target_id;
121	key_t target_key;
122
123	errflg = 0;
124	signal(SIGSYS, not_configured);
125	while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) {
126		signaled = 0;
127		switch (c) {
128		case 'q':
129		case 'm':
130		case 's':
131			target_id = atoi(optarg);
132			if (c == 'q')
133				result = msgrm(0, target_id);
134			else if (c == 'm')
135				result = shmrm(0, target_id);
136			else
137				result = semrm(0, target_id);
138			if (result < 0) {
139				errflg++;
140				if (!signaled)
141					warn("%sid(%d): ",
142					    IPC_TO_STR(toupper(c)), target_id);
143				else
144					warnx("%ss are not configured in the running kernel",
145					    IPC_TO_STRING(toupper(c)));
146			}
147			break;
148		case 'Q':
149		case 'M':
150		case 'S':
151			target_key = atol(optarg);
152			if (target_key == IPC_PRIVATE) {
153				warnx("can't remove private %ss", IPC_TO_STRING(c));
154				continue;
155			}
156			if (c == 'Q')
157				result = msgrm(target_key, 0);
158			else if (c == 'M')
159				result = shmrm(target_key, 0);
160			else
161				result = semrm(target_key, 0);
162			if (result < 0) {
163				errflg++;
164				if (!signaled)
165					warn("%skey(%ld): ", IPC_TO_STR(c),
166					    target_key);
167				else
168					warnx("%ss are not configured in the running kernel",
169					    IPC_TO_STRING(c));
170			}
171			break;
172		case ':':
173			fprintf(stderr, "option -%c requires an argument\n", optopt);
174			usage();
175		default:
176			fprintf(stderr, "unrecognized option: -%c\n", optopt);
177			usage();
178		}
179	}
180
181	if (optind != argc) {
182		fprintf(stderr, "unknown argument: %s\n", argv[optind]);
183		usage();
184	}
185	exit(errflg);
186}
187