1 /* $OpenBSD: getsn.c,v 1.2 1996/08/23 19:22:43 niklas 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Theo de Raadt. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 #include <sys/types.h> 35 #include <sys/systm.h> 36 #include <dev/cons.h> 37 38 int 39 getsn(cp, size) 40 char *cp; 41 int size; 42 { 43 register char *lp; 44 register int len; 45 register int c; 46 47 lp = cp; 48 len = 0; 49 for (;;) { 50 c = cngetc(); 51 switch (c) { 52 case '\n': 53 case '\r': 54 printf("\n"); 55 *lp++ = '\0'; 56 return (len); 57 case '\b': 58 case '\177': 59 if (len) { 60 printf("\b \b"); 61 --lp; 62 --len; 63 } 64 break; 65 case 'u' & 037: 66 while (len) { 67 printf("\b \b"); 68 --lp; 69 --len; 70 } 71 break; 72 case '\t': 73 c = ' '; 74 default: 75 if (len + 1 >= size || c < ' ') { 76 printf("\007"); 77 break; 78 } 79 printf("%c", c); 80 ++len; 81 *lp++ = c; 82 } 83 } 84 } 85