Annotation of sys/lib/libkern/getsn.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: getsn.c,v 1.5 2007/05/03 01:21:32 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 = 0, c;
37: char *lp = cp;
38:
39: while (1) {
40: c = cngetc();
41: switch (c) {
42: case '\n':
43: case '\r':
44: printf("\n");
45: *lp++ = '\0';
46: return (len);
47: case '\b':
48: case '\177':
49: if (len) {
50: printf("\b \b");
51: --lp;
52: --len;
53: }
54: break;
55: case 'u' & 037:
56: while (len) {
57: printf("\b \b");
58: --lp;
59: --len;
60: }
61: break;
62: case '\t':
63: c = ' ';
64: default:
65: if (len + 1 >= size || c < ' ') {
66: printf("\007");
67: break;
68: }
69: printf("%c", c);
70: ++len;
71: *lp++ = c;
72: }
73: }
74: }
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