gtty.c revision 1.3 
1/*
2 * Copyright (c) 1994 Christopher G. Demetriou
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *      This product includes software developed by Christopher G. Demetriou.
16 * 4. The name of the author may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <sys/cdefs.h>
32#ifndef lint
33__RCSID("$NetBSD: gtty.c,v 1.3 1999/09/16 11:45:46 lukem Exp $");
34#endif /* not lint */
35
36#include <assert.h>
37#include <errno.h>
38#include <sgtty.h>
39
40/*
41 * Get tty modes.
42 * This was defined in ioctl_compat.h as:
43 *	#define	gtty(fd, tty)	ioctl(fd, TIOCGETP, tty)
44 */
45int
46gtty(fd, tty)
47	int fd;
48	struct sgttyb *tty;
49{
50
51	_DIAGASSERT(fd != -1);
52	_DIAGASSERT(tty != 0);
53#ifdef _DIAGNOSTIC
54	if (fd == -1) {
55		errno = EBADF;
56		return (-1);
57	}
58	if (tty == 0) {
59		errno = EINVAL;
60		return (-1);
61	}
62#endif
63
64	return (ioctl(fd, TIOCGETP, tty));
65}
66