readlink.c revision 794f0adb050e571bbfde4d2a19b9f88b852079dd
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include "lint.h"
#include <sys/syscall.h>
#include <sys/unistd.h>
#include <sys/fcntl.h>
ssize_t
readlinkat(int fd, const char *path, char *buf, size_t bufsize)
{
sysret_t rval;
int error;
error = __systemcall(&rval, SYS_readlinkat, fd, path, buf, bufsize);
if (error)
(void) __set_errno(error);
return ((ssize_t)rval.sys_rval1);
}
#pragma weak _readlink = readlink
ssize_t
readlink(const char *path, char *buf, size_t bufsize)
{
#if defined(_RETAIN_OLD_SYSCALLS)
sysret_t rval;
int error;
error = __systemcall(&rval, SYS_readlink, path, buf, bufsize);
if (error)
(void) __set_errno(error);
return ((ssize_t)rval.sys_rval1);
#else
return (readlinkat(AT_FDCWD, path, buf, bufsize));
#endif
}