killall.c revision b3863623bad65c4d98e8af1ef92ca8748dc4396b
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23/*	  All Rights Reserved  	*/
24
25
26/*
27 * Copyright (c) 1998 by Sun Microsystems, Inc.
28 * All rights reserved.
29 */
30
31#include <sys/types.h>
32#include <signal.h>
33#include <errno.h>
34#include <utmpx.h>
35#include <stdio.h>
36#include <unistd.h>
37
38int
39main(int argc, char *argv[])
40{
41	int sig;
42	struct utmpx *u;
43	char usage[] = "usage: killall [signal]\n";
44	char perm[] = "permission denied\n";
45
46	if (geteuid() != 0) {
47		(void) write(2, perm, sizeof (perm)-1);
48		return (1);
49	}
50	switch (argc) {
51		case 1:
52			sig = SIGTERM;
53			break;
54		case 2:
55			if (str2sig(argv[1], &sig) == 0)
56				break;
57			/* FALLTHROUGH */
58		default:
59			(void) write(2, usage, sizeof (usage)-1);
60			return (1);
61	}
62
63	while ((u = getutxent()) != NULL) {
64		if ((u->ut_type == LOGIN_PROCESS) ||
65		    (u->ut_type == USER_PROCESS))
66			(void) kill(u->ut_pid, sig);
67	}
68	endutxent();
69
70	return (0);
71}
72