1 /* $NetBSD: gets.c,v 1.13 2016/06/11 06:20:11 dholland 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 "stand.h" 35 36 void 37 gets(char *buf) 38 { 39 kgets(buf, (size_t)-1); 40 } 41 42 void 43 kgets(char *buf, size_t size) 44 { 45 int c; 46 char *lp; 47 48 for (lp = buf;;) { 49 if (lp - buf == size) { 50 lp--; 51 *lp = '\0'; 52 return; 53 } 54 switch (c = getchar() & 0177) { 55 case '\n': 56 case '\r': 57 *lp = '\0'; 58 putchar('\n'); 59 return; 60 case '\b': 61 case '\177': 62 if (lp > buf) { 63 lp--; 64 putchar('\b'); 65 putchar(' '); 66 putchar('\b'); 67 } 68 break; 69 #if HASH_ERASE 70 case '#': 71 if (lp > buf) 72 --lp; 73 break; 74 #endif 75 case 'r' & 037: { 76 char *p; 77 78 putchar('\n'); 79 for (p = buf; p < lp; ++p) 80 putchar(*p); 81 break; 82 } 83 #if AT_ERASE 84 case '@': 85 #endif 86 case 'u' & 037: 87 case 'w' & 037: 88 lp = buf; 89 putchar('\n'); 90 break; 91 default: 92 *lp++ = c; 93 putchar(c); 94 break; 95 } 96 } 97 /*NOTREACHED*/ 98 } 99