/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */


/*
 * Copyright (c) 1998 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#include <sys/types.h>
#include <signal.h>
#include <errno.h>
#include <utmpx.h>
#include <stdio.h>
#include <unistd.h>

int
main(int argc, char *argv[])
{
        int sig;
        struct utmpx *u;
        char usage[] = "usage: killall [signal]\n";
        char perm[] = "permission denied\n";

        if (geteuid() != 0) {
                (void) write(2, perm, sizeof (perm)-1);
                return (1);
        }
        switch (argc) {
                case 1:
                        sig = SIGTERM;
                        break;
                case 2:
                        if (str2sig(argv[1], &sig) == 0)
                                break;
                        /* FALLTHROUGH */
                default:
                        (void) write(2, usage, sizeof (usage)-1);
                        return (1);
        }

        while ((u = getutxent()) != NULL) {
                if ((u->ut_type == LOGIN_PROCESS) ||
                    (u->ut_type == USER_PROCESS))
                        (void) kill(u->ut_pid, sig);
        }
        endutxent();

        return (0);
}