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/**
* @file
* Public Interface for querying initial SIDs of a policy.
*
* @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 APOL_ISID_QUERY_H
#define APOL_ISID_QUERY_H
#ifdef __cplusplus
extern "C"
{
#endif
#include "policy.h"
#include "vector.h"
#include "context-query.h"
#include <qpol/policy.h>
typedef struct apol_isid_query apol_isid_query_t;
/******************** isid queries ********************/
/**
* Execute a query against all initial SIDs within the policy. The
* returned isids will be unordered.
*
* @param p Policy within which to look up initial SIDs.
* @param i Structure containing parameters for query. If this is
* NULL then return all isids.
* @param v Reference to a vector of qpol_isid_t. The vector will be
* allocated by this function. The caller must call
* apol_vector_destroy() afterwards. This will be set to NULL upon no
* results or upon error.
*
* @return 0 on success (including none found), negative on error.
*/
extern int apol_isid_get_by_query(const apol_policy_t * p, const apol_isid_query_t * i, apol_vector_t ** v);
/**
* Allocate and return a new isid query structure. All fields are
* initialized, such that running this blank query results in
* returning all initial SIDs within the policy. The caller must call
* apol_isid_query_destroy() upon the return value afterwards.
*
* @return An initialized isid query structure, or NULL upon error.
*/
extern apol_isid_query_t *apol_isid_query_create(void);
/**
* Deallocate all memory associated with the referenced isid query,
* and then set it to NULL. This function does nothing if the query
* is already NULL.
*
* @param i Reference to an isid query structure to destroy.
*/
extern void apol_isid_query_destroy(apol_isid_query_t ** i);
/**
* Set an isid query to return only initial SIDs with this name.
*
* @param p Policy handler, to report errors.
* @param i isid query to set.
* @param name Limit query to only initial SIDs with this name, or
* NULL to unset this field.
*
* @return 0 on success, negative on error.
*/
extern int apol_isid_query_set_name(const apol_policy_t * p, apol_isid_query_t * i, const char *name);
/**
* Set an isid query to return only initial SIDs matching a context.
* This function takes ownership of the context, such that the caller
* must not modify nor destroy it afterwards.
*
* @param p Policy handler, to report errors.
* @param i isid query to set.
* @param context Limit query to only initial SIDs matching this
* context, or NULL to unset this field.
* @param range_match Specifies how to match the MLS range within the
* context. This must be one of APOL_QUERY_SUB, APOL_QUERY_SUPER, or
* APOL_QUERY_EXACT. This parameter is ignored if context is NULL.
*
* @return Always returns 0.
*/
extern int apol_isid_query_set_context(const apol_policy_t * p,
apol_isid_query_t * i, apol_context_t * context, unsigned int range_match);
#ifdef __cplusplus
}
#endif
#endif /* APOL_ISID_QUERY_H */
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