1*4a5d661aSToomas Soome /* $NetBSD: gets.c,v 1.6 1995/10/11 21:16:57 pk Exp $ */
2*4a5d661aSToomas Soome
3*4a5d661aSToomas Soome /*-
4*4a5d661aSToomas Soome * Copyright (c) 1993
5*4a5d661aSToomas Soome * The Regents of the University of California. All rights reserved.
6*4a5d661aSToomas Soome *
7*4a5d661aSToomas Soome * Redistribution and use in source and binary forms, with or without
8*4a5d661aSToomas Soome * modification, are permitted provided that the following conditions
9*4a5d661aSToomas Soome * are met:
10*4a5d661aSToomas Soome * 1. Redistributions of source code must retain the above copyright
11*4a5d661aSToomas Soome * notice, this list of conditions and the following disclaimer.
12*4a5d661aSToomas Soome * 2. Redistributions in binary form must reproduce the above copyright
13*4a5d661aSToomas Soome * notice, this list of conditions and the following disclaimer in the
14*4a5d661aSToomas Soome * documentation and/or other materials provided with the distribution.
15*4a5d661aSToomas Soome * 4. Neither the name of the University nor the names of its contributors
16*4a5d661aSToomas Soome * may be used to endorse or promote products derived from this software
17*4a5d661aSToomas Soome * without specific prior written permission.
18*4a5d661aSToomas Soome *
19*4a5d661aSToomas Soome * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20*4a5d661aSToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21*4a5d661aSToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22*4a5d661aSToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23*4a5d661aSToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24*4a5d661aSToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25*4a5d661aSToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26*4a5d661aSToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27*4a5d661aSToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28*4a5d661aSToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29*4a5d661aSToomas Soome * SUCH DAMAGE.
30*4a5d661aSToomas Soome *
31*4a5d661aSToomas Soome * @(#)gets.c 8.1 (Berkeley) 6/11/93
32*4a5d661aSToomas Soome */
33*4a5d661aSToomas Soome
34*4a5d661aSToomas Soome #include <sys/cdefs.h>
35*4a5d661aSToomas Soome __FBSDID("$FreeBSD$");
36*4a5d661aSToomas Soome
37*4a5d661aSToomas Soome #include "stand.h"
38*4a5d661aSToomas Soome
39*4a5d661aSToomas Soome /* gets() with constrained input length */
40*4a5d661aSToomas Soome
41*4a5d661aSToomas Soome void
ngets(char * buf,int n)42*4a5d661aSToomas Soome ngets(char *buf, int n)
43*4a5d661aSToomas Soome {
44*4a5d661aSToomas Soome int c;
45*4a5d661aSToomas Soome char *lp;
46*4a5d661aSToomas Soome
47*4a5d661aSToomas Soome for (lp = buf;;)
48*4a5d661aSToomas Soome switch (c = getchar() & 0177) {
49*4a5d661aSToomas Soome case '\n':
50*4a5d661aSToomas Soome case '\r':
51*4a5d661aSToomas Soome *lp = '\0';
52*4a5d661aSToomas Soome putchar('\n');
53*4a5d661aSToomas Soome return;
54*4a5d661aSToomas Soome case '\b':
55*4a5d661aSToomas Soome case '\177':
56*4a5d661aSToomas Soome if (lp > buf) {
57*4a5d661aSToomas Soome lp--;
58*4a5d661aSToomas Soome putchar('\b');
59*4a5d661aSToomas Soome putchar(' ');
60*4a5d661aSToomas Soome putchar('\b');
61*4a5d661aSToomas Soome }
62*4a5d661aSToomas Soome break;
63*4a5d661aSToomas Soome case 'r'&037: {
64*4a5d661aSToomas Soome char *p;
65*4a5d661aSToomas Soome
66*4a5d661aSToomas Soome putchar('\n');
67*4a5d661aSToomas Soome for (p = buf; p < lp; ++p)
68*4a5d661aSToomas Soome putchar(*p);
69*4a5d661aSToomas Soome break;
70*4a5d661aSToomas Soome }
71*4a5d661aSToomas Soome case 'u'&037:
72*4a5d661aSToomas Soome case 'w'&037:
73*4a5d661aSToomas Soome lp = buf;
74*4a5d661aSToomas Soome putchar('\n');
75*4a5d661aSToomas Soome break;
76*4a5d661aSToomas Soome default:
77*4a5d661aSToomas Soome if ((n < 1) || ((lp - buf) < n - 1)) {
78*4a5d661aSToomas Soome *lp++ = c;
79*4a5d661aSToomas Soome putchar(c);
80*4a5d661aSToomas Soome }
81*4a5d661aSToomas Soome }
82*4a5d661aSToomas Soome /*NOTREACHED*/
83*4a5d661aSToomas Soome }
84*4a5d661aSToomas Soome
85*4a5d661aSToomas Soome int
fgetstr(char * buf,int size,int fd)86*4a5d661aSToomas Soome fgetstr(char *buf, int size, int fd)
87*4a5d661aSToomas Soome {
88*4a5d661aSToomas Soome char c;
89*4a5d661aSToomas Soome int err, len;
90*4a5d661aSToomas Soome
91*4a5d661aSToomas Soome size--; /* leave space for terminator */
92*4a5d661aSToomas Soome len = 0;
93*4a5d661aSToomas Soome while (size != 0) {
94*4a5d661aSToomas Soome err = read(fd, &c, sizeof(c));
95*4a5d661aSToomas Soome if (err < 0) /* read error */
96*4a5d661aSToomas Soome return(-1);
97*4a5d661aSToomas Soome if (err == 0) { /* EOF */
98*4a5d661aSToomas Soome if (len == 0)
99*4a5d661aSToomas Soome return(-1); /* nothing to read */
100*4a5d661aSToomas Soome break;
101*4a5d661aSToomas Soome }
102*4a5d661aSToomas Soome if ((c == '\r') || /* line terminators */
103*4a5d661aSToomas Soome (c == '\n'))
104*4a5d661aSToomas Soome break;
105*4a5d661aSToomas Soome *buf++ = c; /* keep char */
106*4a5d661aSToomas Soome size--;
107*4a5d661aSToomas Soome len++;
108*4a5d661aSToomas Soome }
109*4a5d661aSToomas Soome *buf = 0;
110*4a5d661aSToomas Soome return(len);
111*4a5d661aSToomas Soome }
112*4a5d661aSToomas Soome
113