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/**
* @file
* Defines the public interface accessing contexts.
*
* @author Kevin Carr kcarr@tresys.com
* @author Jeremy A. Mowery jmowery@tresys.com
* @author Jason Tang jtang@tresys.com
*
* Copyright (C) 2006-2007 Tresys Technology, LLC
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef QPOL_CONTEXT_QUERY_H
#define QPOL_CONTEXT_QUERY_H
#ifdef __cplusplus
extern "C"
{
#endif
#include <stddef.h>
#include <stdint.h>
#include <qpol/policy.h>
#include <qpol/user_query.h>
#include <qpol/role_query.h>
#include <qpol/type_query.h>
#include <qpol/mls_query.h>
typedef struct qpol_context qpol_context_t;
/**
* Get the datum for the user field of a context.
* @param policy The policy associated with the context.
* @param context The context from which to get the user.
* @param user Pointer in which to store the user datum.
* The caller should not free this pointer.
* @return 0 on success and < 0 on failure; if the call fails,
* errno will be set and *user will be NULL.
*/
extern int qpol_context_get_user(const qpol_policy_t * policy, const qpol_context_t * context, const qpol_user_t ** user);
/**
* Get the datum for the role field of a context.
* @param policy The policy associated with the context.
* @param context The context from which to get the role.
* @param role Pointer in which to store the role datum.
* The caller should not free this pointer.
* @return 0 on success and < 0 on failure; if the call fails,
* errno will be set and *role will be NULL.
*/
extern int qpol_context_get_role(const qpol_policy_t * policy, const qpol_context_t * context, const qpol_role_t ** role);
/**
* Get the datum for the type field of a context.
* @param policy The policy associated with the context.
* @param context The context from which to get the type.
* @param type Pointer in which to store the type datum.
* The caller should not free this pointer.
* @return 0 on success and < 0 on failure; if the call fails,
* errno will be set and *type will be NULL.
*/
extern int qpol_context_get_type(const qpol_policy_t * policy, const qpol_context_t * context, const qpol_type_t ** type);
/**
* Get the datum for the MLS range field of a context.
* @param policy The policy associated with the context.
* @param context The context from which to get the MLS range.
* @param range Pointer in which to store the MLS range.
* The caller should not free this pointer.
* @return 0 on success and < 0 on failure; if the call fails,
* errno will be set and *range will be NULL.
*/
extern int qpol_context_get_range(const qpol_policy_t * policy, const qpol_context_t * context,
const qpol_mls_range_t ** range);
#ifdef __cplusplus
}
#endif
#endif /* QPOL_CONTEXT_QUERY_H */
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