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/*
Unix SMB/Netbios implementation.
Version 3.0
Samba database functions
Copyright (C) Andrew Tridgell 1999
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
typedef unsigned tdb_len;
typedef unsigned tdb_off;
#define TDB_MAGIC_FOOD "TDB file\n"
/* this is stored at the front of every database */
struct tdb_header {
char magic_food[32]; /* for /etc/magic */
unsigned version; /* version of the code */
unsigned hash_size; /* number of hash entries */
tdb_off reserved[32];
};
typedef struct {
char *dptr;
size_t dsize;
} TDB_DATA;
struct tdb_lock_type {
unsigned count;
unsigned ltype;
};
/* this is the context structure that is returned from a db open */
typedef struct {
char *name; /* the name of the database */
void *map_ptr; /* where it is currently mapped */
int fd; /* open file descriptor for the database */
tdb_len map_size; /* how much space has been mapped */
int read_only; /* opened read-only */
struct tdb_lock_type *locked; /* set if we have a chain locked */
int ecode; /* error code for last tdb error */
struct tdb_header header; /* a cached copy of the header */
unsigned flags; /* the flags passed to tdb_open */
} TDB_CONTEXT;
/* flags to tdb_store() */
#define TDB_REPLACE 1
#define TDB_INSERT 2
#define TDB_MODIFY 3
/* flags for tdb_open() */
#define TDB_CLEAR_IF_FIRST 1
#define TDB_INTERNAL 2 /* don't store on disk */
#define TDB_NOLOCK 4 /* don't do any locking */
#define TDB_NOMMAP 8 /* don't use mmap */
/* error codes */
enum TDB_ERROR {TDB_SUCCESS=0, TDB_ERR_CORRUPT, TDB_ERR_IO, TDB_ERR_LOCK,
TDB_ERR_OOM, TDB_ERR_EXISTS, TDB_ERR_NOEXIST };
typedef int (*tdb_traverse_func)(TDB_CONTEXT *, TDB_DATA, TDB_DATA, void *);
#if STANDALONE
TDB_CONTEXT *tdb_open(char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode);
char *tdb_error(TDB_CONTEXT *tdb);
int tdb_writelock(TDB_CONTEXT *tdb);
int tdb_writeunlock(TDB_CONTEXT *tdb);
TDB_DATA tdb_fetch(TDB_CONTEXT *tdb, TDB_DATA key);
int tdb_delete(TDB_CONTEXT *tdb, TDB_DATA key);
int tdb_store(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, int flag);
int tdb_close(TDB_CONTEXT *tdb);
TDB_DATA tdb_firstkey(TDB_CONTEXT *tdb);
TDB_DATA tdb_nextkey(TDB_CONTEXT *tdb, TDB_DATA key);
int tdb_traverse(TDB_CONTEXT *tdb,
int (*fn)(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, void *state),
void *state);
int tdb_exists(TDB_CONTEXT *tdb, TDB_DATA key);
#endif
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