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#ifndef __TDB_H__
#define __TDB_H__
/*
Unix SMB/CIFS implementation.
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.
*/
#include "config.h"
#ifdef __cplusplus
extern "C" {
#endif
#if defined (__cplusplus) || (defined (__STDC__) && __STDC__)
#undef __P
#define __P(protos) protos
#else /* Not C++ or ANSI C. */
#undef __P
#define __P(protos) ()
#endif /* C++ or ANSI C. */
#ifndef _INCLUDES_H
typedef int SIG_ATOMIC_T;
#endif
/* flags to tdb_store() */
#define TDB_REPLACE 1
#define TDB_INSERT 2
#define TDB_MODIFY 3
/* flags for tdb_open() */
#define TDB_DEFAULT 0 /* just a readability place holder */
#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 */
#define TDB_CONVERT 16 /* convert endian (internal use) */
#define TDB_BIGENDIAN 32 /* header is big-endian (internal use) */
#define TDB_ERRCODE(code, ret) ((tdb->ecode = (code)), ret)
/* 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, TDB_ERR_NOLOCK, TDB_ERR_LOCK_TIMEOUT };
#ifndef u32
#define u32 unsigned
#endif
typedef struct {
const char *dptr;
size_t dsize;
} TDB_KEY;
typedef struct {
char *dptr;
size_t dsize;
} TDB_DATA;
typedef u32 tdb_len;
typedef u32 tdb_off;
/* this is stored at the front of every database */
struct tdb_header {
char magic_food[32]; /* for /etc/magic */
u32 version; /* version of the code */
u32 hash_size; /* number of hash entries */
tdb_off rwlocks;
tdb_off reserved[31];
};
struct tdb_lock_type {
u32 count;
u32 ltype;
};
struct tdb_traverse_lock {
struct tdb_traverse_lock *next;
u32 off;
u32 hash;
};
/* this is the context structure that is returned from a db open */
typedef struct tdb_context {
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; /* array of chain locks */
enum TDB_ERROR ecode; /* error code for last tdb error */
struct tdb_header header; /* a cached copy of the header */
u32 flags; /* the flags passed to tdb_open */
u32 *lockedkeys; /* array of locked keys: first is #keys */
struct tdb_traverse_lock travlocks; /* current traversal locks */
struct tdb_context *next; /* all tdbs to avoid multiple opens */
dev_t device; /* uniquely identifies this tdb */
ino_t inode; /* uniquely identifies this tdb */
void (*log_fn) __P((struct tdb_context *tdb, int level, const char *, ...)); /* logging function */
int open_flags; /* flags used in the open - needed by reopen */
} TDB_CONTEXT;
typedef int (*tdb_traverse_func) __P((TDB_CONTEXT *, TDB_KEY, TDB_DATA, void *));
typedef void (*tdb_log_func) __P((TDB_CONTEXT *, int , const char *, ...));
TDB_CONTEXT *tdb_open __P((const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode));
TDB_CONTEXT *tdb_open_ex __P((const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode,
tdb_log_func log_fn));
int tdb_reopen __P((TDB_CONTEXT *tdb));
int tdb_reopen_all __P((void));
void tdb_logging_function __P((TDB_CONTEXT *tdb, tdb_log_func));
enum TDB_ERROR tdb_error __P((TDB_CONTEXT *tdb));
const char *tdb_errorstr __P((TDB_CONTEXT *tdb));
TDB_DATA tdb_fetch __P((TDB_CONTEXT *tdb, TDB_KEY key));
int tdb_delete __P((TDB_CONTEXT *tdb, TDB_KEY key));
int tdb_store __P((TDB_CONTEXT *tdb, TDB_KEY key, TDB_DATA dbuf, int flag));
int tdb_append __P((TDB_CONTEXT *tdb, TDB_KEY key, TDB_DATA new_dbuf));
int tdb_close __P((TDB_CONTEXT *tdb));
TDB_DATA tdb_firstkey __P((TDB_CONTEXT *tdb));
TDB_DATA tdb_nextkey __P((TDB_CONTEXT *tdb, TDB_DATA key));
int tdb_traverse __P((TDB_CONTEXT *tdb, tdb_traverse_func fn, void *state));
int tdb_exists __P((TDB_CONTEXT *tdb, TDB_KEY key));
int tdb_lockkeys __P((TDB_CONTEXT *tdb, u32 number, TDB_KEY keys[]));
void tdb_unlockkeys __P((TDB_CONTEXT *tdb));
int tdb_lockall __P((TDB_CONTEXT *tdb));
void tdb_unlockall __P((TDB_CONTEXT *tdb));
/* Low level locking functions: use with care */
void tdb_set_lock_alarm __P((SIG_ATOMIC_T *palarm));
int tdb_chainlock __P((TDB_CONTEXT *tdb, TDB_KEY key));
int tdb_chainunlock __P((TDB_CONTEXT *tdb, TDB_KEY key));
/* Debug functions. Not used in production. */
void tdb_dump_all __P((TDB_CONTEXT *tdb));
int tdb_printfreelist __P((TDB_CONTEXT *tdb));
extern TDB_DATA tdb_null;
#ifdef __cplusplus
}
#endif
#endif /* tdb.h */
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