lib/util/util_tdb.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    tdb utility functions
   5
   6    Copyright (C) Andrew Tridgell 1992-2006
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #ifndef _____LIB_UTIL_UTIL_TDB_H__
  23 #define _____LIB_UTIL_UTIL_TDB_H__
  24
  25 #include <tdb.h>
  26
  27 /***************************************************************
  28  Make a TDB_DATA and keep the const warning in one place
  29 ****************************************************************/
  30 TDB_DATA make_tdb_data(const uint8_t *dptr, size_t dsize);
  31 bool tdb_data_equal(TDB_DATA t1, TDB_DATA t2);
  32 bool tdb_data_is_empty(TDB_DATA d);
  33 TDB_DATA string_tdb_data(const char *string);
  34 TDB_DATA string_term_tdb_data(const char *string);
  35 TDB_DATA tdb_data_talloc_copy(TALLOC_CTX* mem_ctx, TDB_DATA data);
  36
  37 /****************************************************************************
  38  Lock a chain by string. Return non-zero if lock failed.
  39 ****************************************************************************/
  40 int tdb_lock_bystring(struct tdb_context *tdb, const char *keyval);
  41
  42 /****************************************************************************
  43  Unlock a chain by string.
  44 ****************************************************************************/
  45 void tdb_unlock_bystring(struct tdb_context *tdb, const char *keyval);
  46
  47 /****************************************************************************
  48  Read lock a chain by string. Return non-zero if lock failed.
  49 ****************************************************************************/
  50 int tdb_read_lock_bystring(struct tdb_context *tdb, const char *keyval);
  51
  52 /****************************************************************************
  53  Read unlock a chain by string.
  54 ****************************************************************************/
  55 void tdb_read_unlock_bystring(struct tdb_context *tdb, const char *keyval);
  56
  57 /****************************************************************************
  58  Fetch a int32_t value by string key, return -1 if not found.
  59  Output is int32_t in native byte order.
  60 ****************************************************************************/
  61 int32_t tdb_fetch_int32(struct tdb_context *tdb, const char *keystr);
  62
  63 /****************************************************************************
  64  Store a int32_t value by string key, return 0 on success, -ve on failure.
  65  Input is int32_t in native byte order. Output in tdb is in little-endian.
  66 ****************************************************************************/
  67 int tdb_store_int32(struct tdb_context *tdb, const char *keystr, int32_t v);
  68
  69 /****************************************************************************
  70  Fetch a uint32_t value by string key, return -1 if not found.
  71  Output is uint32_t in native byte order.
  72 ****************************************************************************/
  73 bool tdb_fetch_uint32(struct tdb_context *tdb, const char *keystr, uint32_t *value);
  74
  75 /****************************************************************************
  76  Store a uint32_t value by string key, return true on success, false on failure.
  77  Input is uint32_t in native byte order. Output in tdb is in little-endian.
  78 ****************************************************************************/
  79 bool tdb_store_uint32(struct tdb_context *tdb, const char *keystr, uint32_t value);
  80
  81 /****************************************************************************
  82  Store a buffer by a null terminated string key.  Return 0 on success, -ve
  83  on failure.
  84 ****************************************************************************/
  85 int tdb_store_bystring(struct tdb_context *tdb, const char *keystr, TDB_DATA data, int flags);
  86
  87 /****************************************************************************
  88  Fetch a buffer using a null terminated string key.  Don't forget to call
  89  free() on the result dptr.
  90 ****************************************************************************/
  91 TDB_DATA tdb_fetch_bystring(struct tdb_context *tdb, const char *keystr);
  92
  93 /****************************************************************************
  94  Delete an entry using a null terminated string key.  0 on success, -ve on err.
  95 ****************************************************************************/
  96 int tdb_delete_bystring(struct tdb_context *tdb, const char *keystr);
  97
  98 /****************************************************************************
  99  Atomic integer change. Returns old value. To create, set initial value in *oldval.
 100 ****************************************************************************/
 101 int32_t tdb_change_int32_atomic(struct tdb_context *tdb, const char *keystr, int32_t *oldval, int32_t change_val);
 102
 103 /****************************************************************************
 104  Atomic unsigned integer change. Returns old value. To create, set initial value in *oldval.
 105 ****************************************************************************/
 106 bool tdb_change_uint32_atomic(struct tdb_context *tdb, const char *keystr, uint32_t *oldval, uint32_t change_val);
 107
 108 /****************************************************************************
 109  Allow tdb_delete to be used as a tdb_traversal_fn.
 110 ****************************************************************************/
 111 int tdb_traverse_delete_fn(struct tdb_context *the_tdb, TDB_DATA key, TDB_DATA dbuf,
 112                      void *state);
 113
 114 /****************************************************************************
 115  Return an NTSTATUS from a TDB_ERROR
 116 ****************************************************************************/
 117
 118 NTSTATUS map_nt_error_from_tdb(enum TDB_ERROR err);
 119
 120 /****************************************************************************
 121  Return an errno from a TDB_ERROR
 122 ****************************************************************************/
 123
 124 int map_unix_error_from_tdb(enum TDB_ERROR err);
 125
 126 int tdb_fetch_talloc(struct tdb_context *tdb, TDB_DATA key,
 127                      TALLOC_CTX *mem_ctx, uint8_t **buf);
 128
 129 #endif /* _____LIB_UTIL_UTIL_TDB_H__ */