1 /* $NetBSD: tgets.c,v 1.1 2004/04/10 12:30:26 tsutsui 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 37 #define USE_SCAN 38 39 int 40 tgets(buf) 41 char *buf; 42 { 43 int c; 44 char *lp; 45 46 #ifdef USE_SCAN 47 int i; 48 49 #define SCANWAIT 10000 50 #define PWAIT 500 51 for (i = 0; i < PWAIT; i++) { 52 if ((c = cnscan()) != -1) 53 goto next; 54 delay(SCANWAIT / 32); /* XXX */ 55 } 56 return (-1); 57 next: 58 #else 59 c = getchar(); 60 #endif 61 for (lp = buf;; c = getchar()) { 62 switch (c & 0177) { 63 case '\n': 64 case '\r': 65 *lp = '\0'; 66 putchar('\n'); 67 return 0; 68 case '\b': 69 case '\177': 70 if (lp > buf) { 71 lp--; 72 putchar('\b'); 73 putchar(' '); 74 putchar('\b'); 75 } 76 break; 77 case 'r' & 037: { 78 char *p; 79 80 putchar('\n'); 81 for (p = buf; p < lp; ++p) 82 putchar(*p); 83 break; 84 } 85 case 'u' & 037: 86 case 'w' & 037: 87 lp = buf; 88 putchar('\n'); 89 break; 90 default: 91 *lp++ = c; 92 putchar(c); 93 } 94 } 95 } 96