1 /* $OpenBSD: getsn.c,v 1.4 2004/08/07 00:38:32 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Theo de Raadt 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #include <sys/types.h> 30 #include <sys/systm.h> 31 #include <dev/cons.h> 32 33 int 34 getsn(char *cp, int size) 35 { 36 int len, c; 37 char *lp; 38 39 lp = cp; 40 len = 0; 41 for (;;) { 42 c = cngetc(); 43 switch (c) { 44 case '\n': 45 case '\r': 46 printf("\n"); 47 *lp++ = '\0'; 48 return (len); 49 case '\b': 50 case '\177': 51 if (len) { 52 printf("\b \b"); 53 --lp; 54 --len; 55 } 56 break; 57 case 'u' & 037: 58 while (len) { 59 printf("\b \b"); 60 --lp; 61 --len; 62 } 63 break; 64 case '\t': 65 c = ' '; 66 default: 67 if (len + 1 >= size || c < ' ') { 68 printf("\007"); 69 break; 70 } 71 printf("%c", c); 72 ++len; 73 *lp++ = c; 74 } 75 } 76 } 77