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/**
* @file
*
* Routines to query policy capabilities in policy.
*
* @author Steve Lawrence slawrence@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_POLCAP_QUERY_H
#define APOL_POLCAP_QUERY_H
#ifdef __cplusplus
extern "C"
{
#endif
#include "policy.h"
#include "vector.h"
#include <qpol/policy.h>
typedef struct apol_polcap_query apol_polcap_query_t;
/**
* Execute a query against all policy capabilities within the policy.
*
* @param p Policy within which to look up policy capabilities.
* @param t Structure containing parameters for query. If this is
* NULL then return all policy capabilities.
* @param v Reference to a vector of qpol_polcap_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_polcap_get_by_query(const apol_policy_t * p, apol_polcap_query_t * t, apol_vector_t ** v);
/**
* Allocate and return a new polcap query structure. All fields are
* initialized, such that running this blank query results in
* returning all policy capabilities within the policy. The caller must call
* apol_polcap_query_destroy() upon the return value afterwards.
*
* @return An initialized polcap query structure, or NULL upon error.
*/
extern apol_polcap_query_t *apol_polcap_query_create(void);
/**
* Deallocate all memory associated with the referenced polcap query,
* and then set it to NULL. This function does nothing if the query
* is already NULL.
*
* @param t Reference to a polcap query structure to destroy.
*/
extern void apol_polcap_query_destroy(apol_polcap_query_t ** t);
/**
* Set a polcap query to return only policy capabilities that match this name. This function
* duplicates the incoming name.
*
* @param p Policy handler, to report errors.
* @param t Polcap query to set.
* @param name Limit query to only policy capabilities with this name, or
* NULL to unset this field.
*
* @return 0 on success, negative on error.
*/
extern int apol_polcap_query_set_name(const apol_policy_t * p, apol_polcap_query_t * t, const char *name);
/**
* Set a polcap query to use regular expression searching for all of its
* fields. Strings will be treated as regexes instead of literals.
* Matching will occur against the policy capability name.
*
* @param p Policy handler, to report errors.
* @param t Polcap query to set.
* @param is_regex Non-zero to enable regex searching, 0 to disable.
*
* @return Always 0.
*/
extern int apol_polcap_query_set_regex(const apol_policy_t * p, apol_polcap_query_t * t, int is_regex);
#ifdef __cplusplus
}
#endif
#endif
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