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/*
* 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) 1994, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Portions of this source code were derived from Berkeley 4.3 BSD
* under license from the Regents of the University of California.
*/
#include <sys/param.h>
#include <sys/isa_defs.h>
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/vnode.h>
#include <sys/file.h>
#include <sys/fcntl.h>
#include <sys/uio.h>
#include <sys/debug.h>
#include <c2/audit.h>
/*
* Make a hard link.
*/
int
linkat(int ffd, char *from, int tfd, char *to, int flag)
{
vnode_t *fstartvp = NULL;
vnode_t *tstartvp = NULL;
enum symfollow follow;
int error;
if (flag & ~AT_SYMLINK_FOLLOW)
return (set_errno(EINVAL));
follow = (flag & AT_SYMLINK_FOLLOW)? FOLLOW : NO_FOLLOW;
if (from == NULL || to == NULL)
return (set_errno(EFAULT));
if ((error = fgetstartvp(ffd, from, &fstartvp)) != 0)
goto out;
if ((error = fgetstartvp(tfd, to, &tstartvp)) != 0)
goto out;
error = vn_linkat(fstartvp, from, follow, tstartvp, to, UIO_USERSPACE);
out:
if (fstartvp != NULL)
VN_RELE(fstartvp);
if (tstartvp != NULL)
VN_RELE(tstartvp);
if (error)
return (set_errno(error));
return (0);
}
int
link(char *from, char *to)
{
return (linkat(AT_FDCWD, from, AT_FDCWD, to, 0));
}
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