/*
 * 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.
 */

/*
 * 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);
}