ipcrm.c revision 1.10 
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
51int signaled;
52
53void	usage(void);
54int	msgrm(key_t, int);
55int	shmrm(key_t, int);
56int	semrm(key_t, int);
57void	not_configured(int);
58
59void
60usage(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
69int
70msgrm(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
80int
81shmrm(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
91int
92semrm(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 */
105void
106not_configured(int signo)
107{
108	signaled++;
109}
110
111int
112main(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}
181