1/*	$NetBSD: keywait.c,v 1.1.1.1 1996/01/07 21:50:50 leo Exp $	*/
2
3/*
4 * Copyright (c) 1995 Waldi Ravens.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *        This product includes software developed by Waldi Ravens.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <stdio.h>
34#include <stdlib.h>
35#include <unistd.h>
36#include <termios.h>
37#include "libtos.h"
38
39int
40key_wait(char *text)
41{
42	struct termios	term_attr;
43	tcflag_t	lfl_orig;
44	int		any_key;
45	char		c;
46
47	any_key = (text == NULL);
48	if (any_key)
49		text = "Press any key...";
50
51	fprintf(stderr, text);
52	fflush(stderr);
53
54	tcgetattr(STDERR_FILENO, &term_attr);
55	lfl_orig = term_attr.c_lflag;
56	if (any_key)
57		term_attr.c_lflag &= ~ECHO;
58	term_attr.c_lflag &= ~ICANON;
59	tcsetattr(STDERR_FILENO, TCSAFLUSH, &term_attr);
60	read(STDERR_FILENO, &c, 1);
61	term_attr.c_lflag = lfl_orig;
62	tcsetattr(STDERR_FILENO, TCSAFLUSH, &term_attr);
63
64	fprintf(stderr, (any_key ? "\r" : "\r\n"));
65	fflush(stderr);
66	return(c);
67}
68