1/*	$NetBSD: tgets.c,v 1.3 2005/12/11 12:18:48 christos Exp $	*/
2
3/*-
4 * Copyright (c) 1993
5 *	The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 *	@(#)gets.c	8.1 (Berkeley) 6/11/93
32 */
33
34#include <lib/libsa/stand.h>
35#include "boot.h"
36
37int
38tgets(char *buf)
39{
40	register int c;
41	register char *lp;
42
43#ifdef	USE_SCAN
44	int i;
45
46#define	SCANWAIT	10000
47#define	PWAIT		500
48	for (i = 0; i < PWAIT; i++) {
49		if ((c = cnscan()) != -1)
50			goto next;
51		delay(SCANWAIT);
52	}
53	return (-1);
54next:
55#else
56	c = getchar();
57#endif
58	for (lp = buf;; c = getchar()) {
59		switch (c & 0177) {
60		case '\n':
61		case '\r':
62			*lp = '\0';
63			putchar('\n');
64			return 0;
65		case '\b':
66		case '\177':
67			if (lp > buf) {
68				lp--;
69				putchar('\b');
70				putchar(' ');
71				putchar('\b');
72			}
73			break;
74		case 'r'&037: {
75			register char *p;
76
77			putchar('\n');
78			for (p = buf; p < lp; ++p)
79				putchar(*p);
80			break;
81		}
82		case 'u'&037:
83		case 'w'&037:
84			lp = buf;
85			putchar('\n');
86			break;
87		default:
88			*lp++ = c;
89			putchar(c);
90		}
91	}
92}
93