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Commit	Line	Data
	1	/*
	2	* SYS/VARSYM.H
	3	*
	4	* Implements structures used for variant symlink support.
	5	*
	6	* $DragonFly: src/sys/sys/varsym.h,v 1.7 2008/02/23 00:59:23 swildner Exp $
	7	*/
	8
	9	#ifndef _SYS_VARSYM_H_
	10	#define _SYS_VARSYM_H_
	11
	12	#if defined(_KERNEL) \|\| defined(_KERNEL_STRUCTURES)
	13
	14	#ifndef _SYS_QUEUE_H_
	15	#include <sys/queue.h> /* TAILQ_* macros */
	16	#endif
	17
	18	#include <sys/lock.h>
	19
	20	struct varsym {
	21	int vs_refs; /* a lot of sharing occurs */
	22	int vs_namelen;
	23	char vs_name; / variable name */
	24	char vs_data; / variable contents */
	25	};
	26
	27	typedef struct varsym *varsym_t;
	28
	29	struct varsyment {
	30	TAILQ_ENTRY(varsyment) ve_entry;
	31	varsym_t ve_sym;
	32	};
	33
	34	struct varsymset {
	35	TAILQ_HEAD(, varsyment) vx_queue;
	36	int vx_setsize;
	37	struct lock vx_lock;
	38	};
	39
	40	#endif /* _KERNEL \|\| _KERNEL_STRUCTURES */
	41
	42	#define VARSYM_PROC 1
	43	#define VARSYM_USER 2
	44	#define VARSYM_SYS 3
	45	#define VARSYM_PRISON 4 /* used internally */
	46
	47	#define VARSYM_PROC_MASK (1 << VARSYM_PROC)
	48	#define VARSYM_USER_MASK (1 << VARSYM_USER)
	49	#define VARSYM_SYS_MASK (1 << VARSYM_SYS)
	50	#define VARSYM_ALL_MASK (VARSYM_PROC_MASK\|VARSYM_USER_MASK\|VARSYM_SYS_MASK)
	51
	52	#define MAXVARSYM_NAME 64
	53	#define MAXVARSYM_DATA 256
	54	#define MAXVARSYM_SET 16384
	55
	56	#ifdef _KERNEL
	57
	58	varsym_t varsymfind(int mask, const char *name, int namelen);
	59	int varsymmake(int level, const char name, const char data);
	60	void varsymdrop(varsym_t var);
	61	void varsymset_init(struct varsymset varsymset, struct varsymset copy);
	62	void varsymset_clean(struct varsymset *varsymset);
	63	int varsymreplace(char *cp, int linklen, int maxlen);
	64
	65	#endif /* _KERNEL */
	66
	67	#endif