/*
 * 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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*
 * biff
 */

#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <locale.h>

int
main(int argc, char **argv)
{
	char *cp = ttyname(2);
	struct stat stb;

	(void) setlocale(LC_ALL, "");

#if !defined(TEXT_DOMAIN)
#define	TEXT_DOMAIN "SYS_TEST"
#endif
	(void) textdomain(TEXT_DOMAIN);

	argc--, argv++;
	if (cp == 0) {
		(void) fprintf(stderr,
			gettext("biff failed:  cannot locate your tty:  "
				"ttyname() for file descriptor 2 returned"
				" NULL\n"));
		exit(1);
	}
	if (stat(cp, &stb) < 0)
		perror(cp), exit(1);
	if (argc == 0) {
		(void) printf("is %s\n",
			stb.st_mode&0100 ? gettext("y") : gettext("n"));
		exit((stb.st_mode&0100) ? 0 : 1);
	}
	switch (argv[0][0]) {

	case 'y':
		if (chmod(cp, stb.st_mode|0100) < 0)
			perror(cp);
		break;

	case 'n':
		if (chmod(cp, stb.st_mode&~0100) < 0)
			perror(cp);
		break;

	default:
		(void) fprintf(stderr, gettext("usage: biff [y] [n]\n"));
	}
	return ((stb.st_mode&0100) ? 0 : 1);
}