/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#pragma weak _ftok = ftok
#include "lint.h"
#include "libc.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mkdev.h>
#include <sys/nvpair.h>
#include <fcntl.h>
#include <attr.h>
key_t
ftok(const char *path, int id)
{
struct stat64 st;
nvlist_t *nvp;
uint32_t devpiece;
int error;
if (stat64(path, &st) < 0)
return ((key_t)-1);
/*
* if getattrat works then extract the FSID from the nvlist
* otherwise, just fall back and use the value from the stat data
*/
if ((error = getattrat(AT_FDCWD, XATTR_VIEW_READONLY,
path, &nvp)) == 0) {
uint64_t value;
if ((error = libc_nvlist_lookup_uint64(nvp,
A_FSID, &value)) == 0)
devpiece = value & 0xfff;
libc_nvlist_free(nvp);
}
if (error)
devpiece = st.st_dev & 0xfff;
return ((key_t)((key_t)id << 24 | devpiece << 12 |
((uint32_t)st.st_ino & 0x0fff)));
}