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
31 ssize_t
readlinkat(int fd,const char * path,char * buf,size_t bufsize)32 readlinkat(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
44 ssize_t
readlink(const char * path,char * buf,size_t bufsize)45 readlink(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