1#include "config.h"
2
3#if HAVE_GETLINE
4
5int dummy;
6
7#else
8
9/*	$Id: compat_getline.c,v 1.1 2015/11/07 20:52:52 schwarze Exp $ */
10/*
11 * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
12 *
13 * Permission to use, copy, modify, and distribute this software for any
14 * purpose with or without fee is hereby granted, provided that the above
15 * copyright notice and this permission notice appear in all copies.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
18 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
20 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
21 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
22 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
23 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
24 */
25
26#include <sys/types.h>
27#include <errno.h>
28#include <stdio.h>
29#include <stdlib.h>
30
31ssize_t
32getline(char **buf, size_t *bufsz, FILE *fp)
33{
34	char	*nbuf;
35	size_t	 nbufsz, pos;
36	int	 c;
37
38	if (buf == NULL || bufsz == NULL) {
39		errno = EINVAL;
40		return -1;
41	}
42
43	if (*buf == NULL)
44		*bufsz = 0;
45	else
46		**buf = '\0';
47
48	pos = 0;
49	for (;;) {
50		if (pos + 1 >= *bufsz) {
51			nbufsz = *bufsz ? *bufsz * 2 : BUFSIZ;
52			if ((nbuf = realloc(*buf, nbufsz)) == NULL)
53				return -1;
54			*buf = nbuf;
55			*bufsz = nbufsz;
56		}
57		if ((c = fgetc(fp)) == EOF) {
58			(*buf)[pos] = '\0';
59			return pos > 0 && feof(fp) ? (ssize_t)pos : -1;
60		}
61		(*buf)[pos++] = c;
62		(*buf)[pos] = '\0';
63		if (c == '\n')
64			return pos;
65	}
66}
67
68#endif
69