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/*
* Labeling interface for userspace object managers and others.
*
* Author : Eamon Walsh <ewalsh@tycho.nsa.gov>
*/
#ifndef _SELABEL_H_
#define _SELABEL_H_
#include <sys/types.h>
#include <selinux/selinux.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Opaque type used for all label handles.
*/
struct selabel_handle;
/*
* Available backends.
*/
/* file contexts */
#define SELABEL_CTX_FILE 0
/* media contexts */
#define SELABEL_CTX_MEDIA 1
/* x contexts */
#define SELABEL_CTX_X 2
/* db objects */
#define SELABEL_CTX_DB 3
/*
* Available options
*/
/* no-op option, useful for unused slots in an array of options */
#define SELABEL_OPT_UNUSED 0
/* validate contexts before returning them (boolean value) */
#define SELABEL_OPT_VALIDATE 1
/* don't use local customizations to backend data (boolean value) */
#define SELABEL_OPT_BASEONLY 2
/* specify an alternate path to use when loading backend data */
#define SELABEL_OPT_PATH 3
/* select a subset of the search space as an optimization (file backend) */
#define SELABEL_OPT_SUBSET 4
/* total number of options */
#define SELABEL_NOPT 5
/*
* Label operations
*/
/**
* selabel_open - Create a labeling handle.
* @backend: one of the constants specifying a supported labeling backend.
* @opts: array of selabel_opt structures specifying label options or NULL.
* @nopts: number of elements in opts array or zero for no options.
*
* Open a labeling backend for use. The available backend identifiers are
* listed above. Options may be provided via the opts parameter; available
* options are listed above. Not all options may be supported by every
* backend. Return value is the created handle on success or NULL with
* @errno set on failure.
*/
struct selabel_handle *selabel_open(unsigned int backend,
struct selinux_opt *opts, unsigned nopts);
/**
* selabel_close - Close a labeling handle.
* @handle: specifies handle to close
*
* Destroy the specified handle, closing files, freeing allocated memory,
* etc. The handle may not be further used after it has been closed.
*/
void selabel_close(struct selabel_handle *handle);
/**
* selabel_lookup - Perform labeling lookup operation.
* @handle: specifies backend instance to query
* @con: returns the appropriate context with which to label the object
* @key: string input to lookup operation
* @type: numeric input to the lookup operation
*
* Perform a labeling lookup operation. Return %0 on success, -%1 with
* @errno set on failure. The key and type arguments are the inputs to the
* lookup operation; appropriate values are dictated by the backend in use.
* The result is returned in the memory pointed to by @con and must be freed
* by the user with freecon().
*/
int selabel_lookup(struct selabel_handle *handle, security_context_t *con,
const char *key, int type);
int selabel_lookup_raw(struct selabel_handle *handle, security_context_t *con,
const char *key, int type);
/**
* selabel_stats - log labeling operation statistics.
* @handle: specifies backend instance to query
*
* Log a message with information about the number of queries performed,
* number of unused matching entries, or other operational statistics.
* Message is backend-specific, some backends may not output a message.
*/
void selabel_stats(struct selabel_handle *handle);
/*
* Type codes used by specific backends
*/
/* X backend */
#define SELABEL_X_PROP 1
#define SELABEL_X_EXT 2
#define SELABEL_X_CLIENT 3
#define SELABEL_X_EVENT 4
#define SELABEL_X_SELN 5
#define SELABEL_X_POLYPROP 6
#define SELABEL_X_POLYSELN 7
/* DB backend */
#define SELABEL_DB_DATABASE 1
#define SELABEL_DB_SCHEMA 2
#define SELABEL_DB_TABLE 3
#define SELABEL_DB_COLUMN 4
#define SELABEL_DB_SEQUENCE 5
#define SELABEL_DB_VIEW 6
#define SELABEL_DB_PROCEDURE 7
#define SELABEL_DB_BLOB 8
#define SELABEL_DB_TUPLE 9
#ifdef __cplusplus
}
#endif
#endif /* _SELABEL_H_ */