1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright (c) 1991-1994, by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <sys/promif.h>
30#include <sys/promimpl.h>
31
32u_char
33prom_getchar(void)
34{
35	int c;
36
37	while ((c = prom_mayget()) == -1)
38		;
39
40	return ((u_char)c);
41}
42
43int
44prom_mayget(void)
45{
46	ssize_t rv;
47	char c;
48
49	rv = prom_read(prom_stdin_ihandle(), &c, 1, 0, BYTE);
50	return (rv == 1 ? (int)c : -1);
51}
52