source3/lib/dbwrap_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Utility functions for the dbwrap API
   4    Copyright (C) Volker Lendecke 2007
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22
  23 int32_t dbwrap_fetch_int32(struct db_context *db, const char *keystr)
  24 {
  25         TDB_DATA dbuf;
  26         int32 ret;
  27
  28         if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
  29                 return -1;
  30         }
  31
  32         if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(int32_t))) {
  33                 TALLOC_FREE(dbuf.dptr);
  34                 return -1;
  35         }
  36
  37         ret = IVAL(dbuf.dptr, 0);
  38         TALLOC_FREE(dbuf.dptr);
  39         return ret;
  40 }
  41
  42 int dbwrap_store_int32(struct db_context *db, const char *keystr, int32_t v)
  43 {
  44         struct db_record *rec;
  45         int32 v_store;
  46         NTSTATUS status;
  47
  48         rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
  49         if (rec == NULL) {
  50                 return -1;
  51         }
  52
  53         SIVAL(&v_store, 0, v);
  54
  55         status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
  56                                                sizeof(v_store)),
  57                             TDB_REPLACE);
  58         TALLOC_FREE(rec);
  59         return NT_STATUS_IS_OK(status) ? 0 : -1;
  60 }
  61
  62 uint32_t dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
  63                                      uint32_t *oldval, uint32_t change_val)
  64 {
  65         struct db_record *rec;
  66         uint32 val = -1;
  67         TDB_DATA data;
  68
  69         if (!(rec = db->fetch_locked(db, NULL,
  70                                      string_term_tdb_data(keystr)))) {
  71                 return -1;
  72         }
  73
  74         if ((rec->value.dptr != NULL)
  75             && (rec->value.dsize == sizeof(val))) {
  76                 val = IVAL(rec->value.dptr, 0);
  77         }
  78
  79         val += change_val;
  80
  81         data.dsize = sizeof(val);
  82         data.dptr = (uint8 *)&val;
  83
  84         rec->store(rec, data, TDB_REPLACE);
  85
  86         TALLOC_FREE(rec);
  87
  88         return 0;
  89 }
  90