root/usr/src/cmd/tty/tty.c
/*
 * 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 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

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

/*
 * Type tty name
 */

#include <locale.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/stermio.h>

int
main(int argc, char **argv)
{
        char    *p;
        int     i;
        int     lflg    = 0;
        int     sflg    = 0;

        (void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN)
#define TEXT_DOMAIN "SYS_TEST"
#endif
        (void) textdomain(TEXT_DOMAIN);
        while ((i = getopt(argc, argv, "ls")) != EOF)
                switch (i) {
                case 'l':
                        lflg = 1;
                        break;
                case 's':
                        sflg = 1;
                        break;
                case '?':
                        (void) printf(gettext("Usage: tty [-l] [-s]\n"));
                        return (2);
                }
        p = ttyname(0);
        if (!sflg)
                (void) printf("%s\n", (p? p: gettext("not a tty")));
        if (lflg) {
                if ((i = ioctl(0, STWLINE, 0)) == -1)
                        (void) printf(gettext(
                            "not on an active synchronous line\n"));
                else
                        (void) printf(gettext("synchronous line %d\n"), i);
        }
        return (p? 0: 1);
}