1 /* $OpenBSD: getln.c,v 1.1 2015/11/16 19:33:52 miod Exp $ */
2 /* $NetBSD: gets.c,v 1.5.2.1 1995/10/13 19:54:26 pk Exp $ */
3
4 /*-
5 * Copyright (c) 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)gets.c 8.1 (Berkeley) 6/11/93
33 */
34
35 #include "stand.h"
36
37 void
getln(char * buf,size_t bufsiz)38 getln(char *buf, size_t bufsiz)
39 {
40 int c;
41 char *lp, *ep;
42
43 if (bufsiz == 0)
44 return;
45 ep = buf + bufsiz - 1;
46
47 for (lp = buf; ;)
48 switch (c = getchar() & 0177) {
49 case '\n':
50 case '\r':
51 *lp = '\0';
52 putchar('\n');
53 return;
54 case '\b':
55 case '\177':
56 if (lp > buf) {
57 lp--;
58 putchar('\b');
59 putchar(' ');
60 putchar('\b');
61 }
62 break;
63 #if HASH_ERASE
64 case '#':
65 if (lp > buf)
66 --lp;
67 break;
68 #endif
69 case 'r' & 037:
70 {
71 char *p;
72
73 putchar('\n');
74 for (p = buf; p < lp; ++p)
75 putchar(*p);
76 break;
77 }
78 #if AT_ERASE
79 case '@':
80 #endif
81 case 'u' & 037:
82 case 'w' & 037:
83 lp = buf;
84 putchar('\n');
85 break;
86 default:
87 if (lp != ep)
88 *lp++ = c;
89 putchar(c);
90 }
91 /*NOTREACHED*/
92 }
93