1*5f4c09ddSEd Maste /* $NetBSD: fgetln.c,v 1.1 2015/01/22 03:48:07 christos Exp $ */
2*5f4c09ddSEd Maste
3*5f4c09ddSEd Maste /*-
4*5f4c09ddSEd Maste * Copyright (c) 1998 The NetBSD Foundation, Inc.
5*5f4c09ddSEd Maste * All rights reserved.
6*5f4c09ddSEd Maste *
7*5f4c09ddSEd Maste * This code is derived from software contributed to The NetBSD Foundation
8*5f4c09ddSEd Maste * by Christos Zoulas.
9*5f4c09ddSEd Maste *
10*5f4c09ddSEd Maste * Redistribution and use in source and binary forms, with or without
11*5f4c09ddSEd Maste * modification, are permitted provided that the following conditions
12*5f4c09ddSEd Maste * are met:
13*5f4c09ddSEd Maste * 1. Redistributions of source code must retain the above copyright
14*5f4c09ddSEd Maste * notice, this list of conditions and the following disclaimer.
15*5f4c09ddSEd Maste * 2. Redistributions in binary form must reproduce the above copyright
16*5f4c09ddSEd Maste * notice, this list of conditions and the following disclaimer in the
17*5f4c09ddSEd Maste * documentation and/or other materials provided with the distribution.
18*5f4c09ddSEd Maste *
19*5f4c09ddSEd Maste * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20*5f4c09ddSEd Maste * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21*5f4c09ddSEd Maste * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22*5f4c09ddSEd Maste * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23*5f4c09ddSEd Maste * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24*5f4c09ddSEd Maste * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25*5f4c09ddSEd Maste * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26*5f4c09ddSEd Maste * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27*5f4c09ddSEd Maste * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28*5f4c09ddSEd Maste * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29*5f4c09ddSEd Maste * POSSIBILITY OF SUCH DAMAGE.
30*5f4c09ddSEd Maste */
31*5f4c09ddSEd Maste
32*5f4c09ddSEd Maste #ifdef HAVE_CONFIG_H
33*5f4c09ddSEd Maste #include "config.h"
34*5f4c09ddSEd Maste #endif
35*5f4c09ddSEd Maste
36*5f4c09ddSEd Maste #if !HAVE_FGETLN
37*5f4c09ddSEd Maste #include <stdlib.h>
38*5f4c09ddSEd Maste #ifndef HAVE_NBTOOL_CONFIG_H
39*5f4c09ddSEd Maste /* These headers are required, but included from nbtool_config.h */
40*5f4c09ddSEd Maste #include <stdio.h>
41*5f4c09ddSEd Maste #include <unistd.h>
42*5f4c09ddSEd Maste #include <errno.h>
43*5f4c09ddSEd Maste #include <string.h>
44*5f4c09ddSEd Maste #endif
45*5f4c09ddSEd Maste
46*5f4c09ddSEd Maste char *
fgetln(FILE * fp,size_t * len)47*5f4c09ddSEd Maste fgetln(FILE *fp, size_t *len)
48*5f4c09ddSEd Maste {
49*5f4c09ddSEd Maste static char *buf = NULL;
50*5f4c09ddSEd Maste static size_t bufsiz = 0;
51*5f4c09ddSEd Maste char *ptr;
52*5f4c09ddSEd Maste
53*5f4c09ddSEd Maste
54*5f4c09ddSEd Maste if (buf == NULL) {
55*5f4c09ddSEd Maste bufsiz = BUFSIZ;
56*5f4c09ddSEd Maste if ((buf = malloc(bufsiz)) == NULL)
57*5f4c09ddSEd Maste return NULL;
58*5f4c09ddSEd Maste }
59*5f4c09ddSEd Maste
60*5f4c09ddSEd Maste if (fgets(buf, bufsiz, fp) == NULL)
61*5f4c09ddSEd Maste return NULL;
62*5f4c09ddSEd Maste
63*5f4c09ddSEd Maste *len = 0;
64*5f4c09ddSEd Maste while ((ptr = strchr(&buf[*len], '\n')) == NULL) {
65*5f4c09ddSEd Maste size_t nbufsiz = bufsiz + BUFSIZ;
66*5f4c09ddSEd Maste char *nbuf = realloc(buf, nbufsiz);
67*5f4c09ddSEd Maste
68*5f4c09ddSEd Maste if (nbuf == NULL) {
69*5f4c09ddSEd Maste int oerrno = errno;
70*5f4c09ddSEd Maste free(buf);
71*5f4c09ddSEd Maste errno = oerrno;
72*5f4c09ddSEd Maste buf = NULL;
73*5f4c09ddSEd Maste return NULL;
74*5f4c09ddSEd Maste } else
75*5f4c09ddSEd Maste buf = nbuf;
76*5f4c09ddSEd Maste
77*5f4c09ddSEd Maste if (fgets(&buf[bufsiz], BUFSIZ, fp) == NULL) {
78*5f4c09ddSEd Maste buf[bufsiz] = '\0';
79*5f4c09ddSEd Maste *len = strlen(buf);
80*5f4c09ddSEd Maste return buf;
81*5f4c09ddSEd Maste }
82*5f4c09ddSEd Maste
83*5f4c09ddSEd Maste *len = bufsiz;
84*5f4c09ddSEd Maste bufsiz = nbufsiz;
85*5f4c09ddSEd Maste }
86*5f4c09ddSEd Maste
87*5f4c09ddSEd Maste *len = (ptr - buf) + 1;
88*5f4c09ddSEd Maste return buf;
89*5f4c09ddSEd Maste }
90*5f4c09ddSEd Maste
91*5f4c09ddSEd Maste #endif
92*5f4c09ddSEd Maste
93*5f4c09ddSEd Maste #ifdef TEST
94*5f4c09ddSEd Maste int
main(int argc,char * argv[])95*5f4c09ddSEd Maste main(int argc, char *argv[])
96*5f4c09ddSEd Maste {
97*5f4c09ddSEd Maste char *p;
98*5f4c09ddSEd Maste size_t len;
99*5f4c09ddSEd Maste
100*5f4c09ddSEd Maste while ((p = fgetln(stdin, &len)) != NULL) {
101*5f4c09ddSEd Maste (void)printf("%zu %s", len, p);
102*5f4c09ddSEd Maste free(p);
103*5f4c09ddSEd Maste }
104*5f4c09ddSEd Maste return 0;
105*5f4c09ddSEd Maste }
106*5f4c09ddSEd Maste #endif
107