1 /* $OpenBSD: getsn.c,v 1.3 2003/06/02 15:58:42 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(cp, size) 35 char *cp; 36 int size; 37 { 38 register char *lp; 39 register int len; 40 register int c; 41 42 lp = cp; 43 len = 0; 44 for (;;) { 45 c = cngetc(); 46 switch (c) { 47 case '\n': 48 case '\r': 49 printf("\n"); 50 *lp++ = '\0'; 51 return (len); 52 case '\b': 53 case '\177': 54 if (len) { 55 printf("\b \b"); 56 --lp; 57 --len; 58 } 59 break; 60 case 'u' & 037: 61 while (len) { 62 printf("\b \b"); 63 --lp; 64 --len; 65 } 66 break; 67 case '\t': 68 c = ' '; 69 default: 70 if (len + 1 >= size || c < ' ') { 71 printf("\007"); 72 break; 73 } 74 printf("%c", c); 75 ++len; 76 *lp++ = c; 77 } 78 } 79 } 80