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
32 u_char
prom_getchar(void)33 prom_getchar(void)
34 {
35 int c;
36
37 while ((c = prom_mayget()) == -1)
38 ;
39
40 return ((u_char)c);
41 }
42
43 int
prom_mayget(void)44 prom_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