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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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <c_synonyms.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#include <attr.h>
#include <fcntl.h>
#include <errno.h>
#include "libcmdutils.h"
/*
* Returns the status of attempting to obtain the extended system
* attributes in the specified view.
*
* Note: If obtaining status for an extended attribute file, the caller must
* chdir into the hidden directory prior to calling sysattr_status().
*
* Returns 1 if the extended system attributes were obtained, otherwise
* returns 0.
*/
int
sysattr_status(char *file, xattr_view_t view)
{
nvlist_t *response = NULL;
int saveerrno;
int status;
status = getattrat(AT_FDCWD, view, file, &response);
saveerrno = errno;
if (response)
(void) nvlist_free(response);
errno = saveerrno;
return (status == 0);
}
/*
* Returns the type of the specified in file. If the file name matches
* the name of either a read-only or read-write extended system attribute
* file then sysattr_type() returns the type of file:
* return value file type
* ------------ ---------
* _RO_SATTR read-only extended system attribute file
* _RW_SATTR read-write extended system attribute file
* _NOT_SATTR neither a read-only or read-write extended system
* attribute file.
*/
int
sysattr_type(char *file)
{
if (file == NULL) {
errno = ENOENT;
return (_NOT_SATTR);
}
if (strcmp(basename(file), file) != 0) {
errno = EINVAL;
return (_NOT_SATTR);
}
errno = 0;
if (strcmp(file, VIEW_READONLY) == 0) {
return (_RO_SATTR);
} else if (strcmp(file, VIEW_READWRITE) == 0) {
return (_RW_SATTR);
} else {
return (_NOT_SATTR);
}
}
/*
* Call sysattr_support() instead of pathconf(file, _PC_SATTR_ENABLED) or
* pathconf(file, _PC_SATTR_EXISTS) so that if pathconf() fails over NFS, we
* can still try to figure out if extended system attributes are supported by
* testing for a valid extended system attribute file.
*
* 'name' can have the values _PC_SATTR_ENABLED or _PC_SATTR_EXISTS.
*
* Returns 1 if the underlying file system supports extended system attributes,
* otherwise, returns -1.
*/
int
sysattr_support(char *file, int name)
{
int rc;
errno = 0;
if ((name != _PC_SATTR_ENABLED) &&
(name != _PC_SATTR_EXISTS)) {
errno = EINVAL;
return (-1);
}
if (((rc = pathconf(file, name)) == 1) || (errno != EINVAL)) {
return (rc);
}
return (sysattr_status(file, XATTR_VIEW_READONLY));
}
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