1/*	$OpenBSD: realpath.c,v 1.28 2023/05/18 16:11:10 guenther Exp $ */
2/*
3 * Copyright (c) 2019 Bob Beck <beck@openbsd.org>
4 * Copyright (c) 2019 Theo de Raadt <deraadt@openbsd.org>
5 *
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
13 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
15 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
16 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <errno.h>
20#include <stdlib.h>
21#include <string.h>
22#include <unistd.h>
23#include <limits.h>
24#include <syslog.h>
25#include <stdarg.h>
26
27/*
28 * wrapper for kernel __realpath
29 */
30
31char *
32realpath(const char *path, char *resolved)
33{
34	char rbuf[PATH_MAX];
35
36	if (__realpath(path, rbuf) == -1)
37		return NULL;
38	if (resolved == NULL)
39		return (strdup(rbuf));
40	strlcpy(resolved, rbuf, PATH_MAX);
41	return (resolved);
42}
43