1 /* $NetBSD: tgets.c,v 1.1 2000/02/29 15:21:51 nonaka 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)gets.c 8.1 (Berkeley) 6/11/93 36 */ 37 38 #include <lib/libsa/stand.h> 39 #include "boot.h" 40 41 int 42 tgets(buf) 43 char *buf; 44 { 45 register int c; 46 register char *lp; 47 48 #ifdef USE_SCAN 49 int i; 50 51 #define SCANWAIT 10000 52 #define PWAIT 500 53 for (i = 0; i < PWAIT; i++) { 54 if ((c = cnscan()) != -1) 55 goto next; 56 delay(SCANWAIT); 57 } 58 return (-1); 59 next: 60 #else 61 c = getchar(); 62 #endif 63 for (lp = buf;; c = getchar()) { 64 switch (c & 0177) { 65 case '\n': 66 case '\r': 67 *lp = '\0'; 68 putchar('\n'); 69 return 0; 70 case '\b': 71 case '\177': 72 if (lp > buf) { 73 lp--; 74 putchar('\b'); 75 putchar(' '); 76 putchar('\b'); 77 } 78 break; 79 case 'r'&037: { 80 register char *p; 81 82 putchar('\n'); 83 for (p = buf; p < lp; ++p) 84 putchar(*p); 85 break; 86 } 87 case 'u'&037: 88 case 'w'&037: 89 lp = buf; 90 putchar('\n'); 91 break; 92 default: 93 *lp++ = c; 94 putchar(c); 95 } 96 } 97 } 98