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https://github.com/SELinuxProject/setools
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128 lines
5.3 KiB
C
128 lines
5.3 KiB
C
/**
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* @file
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* Defines the public interface for searching and iterating over booleans.
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*
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* @author Kevin Carr kcarr@tresys.com
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* @author Jeremy A. Mowery jmowery@tresys.com
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* @author Jason Tang jtang@tresys.com
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*
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* Copyright (C) 2006-2007 Tresys Technology, LLC
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef QPOL_BOOL_QUERY_H
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#define QPOL_BOOL_QUERY_H
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include <stddef.h>
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#include <stdint.h>
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#include <qpol/policy.h>
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#include <qpol/iterator.h>
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typedef struct qpol_bool qpol_bool_t;
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/**
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* Get the datum for a conditional boolean by name.
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* @param policy The policy database from which to retrieve the boolean.
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* @param name The name of the boolean; searching is case sensitive.
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* @param datum Pointer to set to the boolean's datum entry in the policy.
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* This memory should not be freed by the user.
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* @return Returns 0 on success and < 0 on failure; if the call fails,
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* errno will be set and *datum will be NULL.
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*/
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extern int qpol_policy_get_bool_by_name(const qpol_policy_t * policy, const char *name, qpol_bool_t ** datum);
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/**
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* Get an iterator for conditional booleans in the policy.
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* @param policy The policy database from which to create the iterator.
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* @param iter Iterator of type qpol_bool_t* returned;
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* the user is responsible for calling qpol_iterator_destroy to
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* free memory used. It is also important to note that an iterator
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* is only valid as long as the policy is unchanged.
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* @return Returns 0 on success and < 0 on failure; if the call fails,
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* errno will be set and *iter will be NULL.
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*/
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extern int qpol_policy_get_bool_iter(const qpol_policy_t * policy, qpol_iterator_t ** iter);
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/**
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* Get the integer value associated with a boolean. Values range from 1 to
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* the number of conditional booleans declared in the policy.
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* @param policy The policy with which the boolean is associated.
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* @param datum Boolean datum from which to get the value. Must be non-NULL.
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* @param value Pointer to integer be set to value. Must be non-NULL.
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* @return Returns 0 on success and < 0 on failure; if the call fails,
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* errno will be set and *value will be 0.
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*/
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extern int qpol_bool_get_value(const qpol_policy_t * policy, const qpol_bool_t * datum, uint32_t * value);
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/**
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* Get the state of a boolean.
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* @param policy The policy with which the boolean is associated.
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* @param datum Boolean datum from which to get the state. Must be non-NULL.
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* @param state Pointer to the integer to be set to the boolean's state.
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* Must be non-NULL.
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* @return Returns 0 on success and < 0 on failure; if the call fails,
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* errno will be set and *state will set to 0 (false).
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*/
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extern int qpol_bool_get_state(const qpol_policy_t * policy, const qpol_bool_t * datum, int *state);
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/**
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* Set the state of a boolean and update the state of all conditionals
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* using the boolean.
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* @param policy The policy with which the boolean is associated.
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* The state of the policy is changed by this function.
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* @param datum Boolean datum for which to set the state. Must be non-NULL.
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* @param state Value to which to set the state of the boolean.
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* @return Returns 0 on success and < 0 on failure; if the call fails,
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* errno will be set.
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*/
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extern int qpol_bool_set_state(qpol_policy_t * policy, qpol_bool_t * datum, int state);
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/**
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* Set the state of a boolean but do not update the state of all conditionals
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* using the boolean. The caller is responsible for calling
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* qpol_policy_reevaluate_conds() at a later time to maintain a consistent
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* state of conditional expressions.
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* @param policy The policy with which the boolean is associated.
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* The state of the policy is changed by this function.
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* @param datum Boolean datum for which to set the state. Must be non-NULL.
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* @param state Value to which to set the state of the boolean.
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* @return Returns 0 on success and < 0 on failure; if the call fails,
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* errno will be set.
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*/
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extern int qpol_bool_set_state_no_eval(qpol_policy_t * policy, qpol_bool_t * datum, int state);
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/**
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* Get the name which identifies a boolean from its datum.
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* @param policy The policy with which the boolean is associated.
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* @param datum Boolean datum for which to get the name. Must be non-NULL.
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* @param name Pointer to the string in which to store the name.
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* Must be non-NULL. The caller should not free the string.
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* @return Returns 0 on success and < 0 on failure; if the call fails,
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* errno will be set and *name will be NULL.
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*/
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extern int qpol_bool_get_name(const qpol_policy_t * policy, const qpol_bool_t * datum, const char **name);
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#ifdef __cplusplus
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}
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#endif
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#endif /* QPOL_BOOL_QUERY_H */
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