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
getsn(char * cp,int size)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