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/**
* @file
* Defines the public interface for searching and iterating over roles.
*
* @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_ROLE_QUERY_H
#define QPOL_ROLE_QUERY_H
#ifdef __cplusplus
extern "C"
{
#endif
#include <stddef.h>
#include <stdint.h>
#include <qpol/iterator.h>
#include <qpol/policy.h>
typedef struct qpol_role qpol_role_t;
/**
* Get the datum for a role by name.
* @param policy The policy from which to get the role.
* @param name The name of the role; searching is case sensitive.
* @param datum Pointer in which to store the role datum; the caller
* should not free this pointer.
* @return Returns 0 on success and < 0 on failure; if the call fails,
* errno will be set and *datum will be NULL.
*/
extern int qpol_policy_get_role_by_name(const qpol_policy_t * policy, const char *name, const qpol_role_t ** datum);
/**
* Get an iterator for roles declared in the policy.
* @param policy The policy with which to create the iterator.
* @param iter Iterator of type qpol_role_t* returned;
* the caller is responsible for calling qpol_iterator_destroy to
* free memory used; it is important to note that the iterator
* is valid only as long as the policy is unchanged.
* @return Returns 0 on success and < 0 on failure; if the call fails,
* errno will be set and *iter will be NULL.
*/
extern int qpol_policy_get_role_iter(const qpol_policy_t * policy, qpol_iterator_t ** iter);
/**
* Get the integer value associated with a role; values range from
* 1 to the number of declared roles.
* @param policy The policy associated with the role.
* @param datum The role from which to get the value.
* @param value Pointer to the integer to set to value. Must be non-NULL.
* @return Returns 0 on success and < 0 on failure; if the call fails,
* errno will be set and value will be 0.
*/
extern int qpol_role_get_value(const qpol_policy_t * policy, const qpol_role_t * datum, uint32_t * value);
/**
* Get an iterator for the set of roles dominated by a role.
* @param policy The policy associated with the role.
* @param datum The role from which to get the dominated roles.
* @param dominates Iterator of type qpol_role_t* returned;
* the caller is responsible for calling qpol_iterator_destroy to
* free memory used; it is important to note that the iterator is
* valid only as long as the policy is unchanged. Note: By
* convention a role always dominates itself, so the user of this
* iterator should always check for this case.
* @return Returns 0 on success and < 0 on failure; if the call fails,
* errno will be set and *dominates will be NULL.
*/
extern int qpol_role_get_dominate_iter(const qpol_policy_t * policy, const qpol_role_t * datum,
qpol_iterator_t ** dominates);
/**
* Get an iterator for the set of types assigned to a role.
* @param policy The policy associated with the role.
* @param datum The role from which to get the types.
* @param types Iterator of type qpol_type_t* returned;
* the caller is responsible for calling qpol_iterator_destroy to
* free memory used; it is important to note that the iterator
* is valid only as long as the policy is unchanged.
* @return Returns 0 on success and < 0 on failure; if the call fails,
* errno will be set and types will be NULL.
*/
extern int qpol_role_get_type_iter(const qpol_policy_t * policy, const qpol_role_t * datum, qpol_iterator_t ** types);
/**
* Get the name by which a role is identified from its datum.
* @param policy The policy associated with the role.
* @param datum The role for which to get the name.
* @param name Pointer in which to store the name; the caller
* should not free this string.
* @return Returns 0 on success and < 0 on failure; if the call fails,
* errno will be set and *name will be NULL.
*/
extern int qpol_role_get_name(const qpol_policy_t * policy, const qpol_role_t * datum, const char **name);
#ifdef __cplusplus
}
#endif
#endif /* QPOL_ROLE_QUERY_H */
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