晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/include/sepol/policydb/flask_types.h
/* -*- linux-c -*- */

/*
 * Author : Stephen Smalley, <sds@tycho.nsa.gov>
 */

#ifndef _SEPOL_POLICYDB_FLASK_TYPES_H_
#define _SEPOL_POLICYDB_FLASK_TYPES_H_

/*
 * The basic Flask types and constants.
 */

#include <sys/types.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 * A security context is a set of security attributes 
 * associated with each subject and object controlled
 * by the security policy.  The security context type
 * is defined as a variable-length string that can be
 * interpreted by any application or user with an 
 * understanding of the security policy.
 */
typedef char *sepol_security_context_t;

/*
 * An access vector (AV) is a collection of related permissions
 * for a pair of SIDs.  The bits within an access vector
 * are interpreted differently depending on the class of
 * the object.  The access vector interpretations are specified
 * in flask/access_vectors, and the corresponding constants
 * for permissions are defined in the automatically generated
 * header file av_permissions.h.
 */
typedef uint32_t sepol_access_vector_t;

/*
 * Each object class is identified by a fixed-size value.
 * The set of security classes is specified in flask/security_classes, 
 * with the corresponding constants defined in the automatically 
 * generated header file flask.h.
 */
typedef uint16_t sepol_security_class_t;
#define SEPOL_SECCLASS_NULL			0x0000	/* no class */

#define SELINUX_MAGIC 0xf97cff8c
#define SELINUX_MOD_MAGIC 0xf97cff8d

typedef uint32_t sepol_security_id_t;
#define SEPOL_SECSID_NULL 0

struct sepol_av_decision {
	sepol_access_vector_t allowed;
	sepol_access_vector_t decided;
	sepol_access_vector_t auditallow;
	sepol_access_vector_t auditdeny;
	uint32_t seqno;
};

#ifdef __cplusplus
}
#endif

#endif

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