1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26#include "lint.h"
27#include <sys/syscall.h>
28#include <sys/unistd.h>
29#include <sys/fcntl.h>
30
31ssize_t
32readlinkat(int fd, const char *path, char *buf, size_t bufsize)
33{
34	sysret_t rval;
35	int error;
36
37	error = __systemcall(&rval, SYS_readlinkat, fd, path, buf, bufsize);
38	if (error)
39		(void) __set_errno(error);
40	return ((ssize_t)rval.sys_rval1);
41}
42
43#pragma weak _readlink = readlink
44ssize_t
45readlink(const char *path, char *buf, size_t bufsize)
46{
47#if defined(_RETAIN_OLD_SYSCALLS)
48	sysret_t rval;
49	int error;
50
51	error = __systemcall(&rval, SYS_readlink, path, buf, bufsize);
52	if (error)
53		(void) __set_errno(error);
54	return ((ssize_t)rval.sys_rval1);
55#else
56	return (readlinkat(AT_FDCWD, path, buf, bufsize));
57#endif
58}
59