h_readlink.c revision 276478 
1/* $NetBSD: h_readlink.c,v 1.1 2010/12/27 02:04:19 pgoyette Exp $ */
2
3/*
4 * Copyright (c) 2008 The NetBSD Foundation, Inc.
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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__COPYRIGHT("@(#) Copyright (c) 2008\
31 The NetBSD Foundation, inc. All rights reserved.");
32__RCSID("$NetBSD: h_readlink.c,v 1.1 2010/12/27 02:04:19 pgoyette Exp $");
33
34#include <sys/param.h>
35#include <stdio.h>
36#include <unistd.h>
37#include <stdlib.h>
38
39#ifdef __FreeBSD__
40#include <err.h>
41#include <string.h>
42#endif
43
44int
45main(int argc, char *argv[])
46{
47#ifdef __FreeBSD__
48	char b[512], *sl;
49	int n;
50	size_t len = atoi(argv[1]);
51	sl = malloc(len);
52	memset(sl, 'a', len);
53	sl[len - 1] = 0;
54	unlink("symlink");
55	if (symlink(sl, "symlink") == -1)
56		err(1, "symlink()");
57	n = readlink("symlink", b, len);
58	unlink("symlink");
59#else
60	char b[MAXPATHLEN];
61	size_t len = atoi(argv[1]);
62	(void)readlink("/", b, len);
63#endif
64	(void)printf("%s\n", b);
65	return 0;
66}
67