sys/sys/varsym.h

   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)  FUTURE */
  13 #if 1
  14
  15 #ifndef _SYS_QUEUE_H_
  16 #include <sys/queue.h>          /* TAILQ_* macros */
  17 #endif
  18
  19 struct varsym {
  20     int         vs_refs;        /* a lot of sharing occurs */
  21     int         vs_namelen;
  22     char        *vs_name;       /* variable name */
  23     char        *vs_data;       /* variable contents */
  24 };
  25
  26 typedef struct varsym   *varsym_t;
  27
  28 struct varsyment {
  29     TAILQ_ENTRY(varsyment) ve_entry;
  30     varsym_t    ve_sym;
  31 };
  32
  33 struct varsymset {
  34     TAILQ_HEAD(, varsyment) vx_queue;
  35     int         vx_setsize;
  36 };
  37
  38 #endif  /* _KERNEL || _KERNEL_STRUCTURES */
  39
  40 #define VARSYM_PROC     1
  41 #define VARSYM_USER     2
  42 #define VARSYM_SYS      3
  43 #define VARSYM_PRISON   4       /* used internally */
  44
  45 #define VARSYM_PROC_MASK        (1 << VARSYM_PROC)
  46 #define VARSYM_USER_MASK        (1 << VARSYM_USER)
  47 #define VARSYM_SYS_MASK         (1 << VARSYM_SYS)
  48 #define VARSYM_ALL_MASK         (VARSYM_PROC_MASK|VARSYM_USER_MASK|VARSYM_SYS_MASK)
  49
  50 #define MAXVARSYM_NAME  64
  51 #define MAXVARSYM_DATA  256
  52 #define MAXVARSYM_SET   8192
  53
  54 #ifdef _KERNEL
  55
  56 varsym_t varsymfind(int mask, const char *name, int namelen);
  57 int     varsymmake(int level, const char *name, const char *data);
  58 void    varsymdrop(varsym_t var);
  59 void    varsymset_init(struct varsymset *varsymset, struct varsymset *copy);
  60 void    varsymset_clean(struct varsymset *varsymset);
  61 int     varsymreplace(char *cp, int linklen, int maxlen);
  62
  63 #endif  /* _KERNEL */
  64
  65 #endif