lib/ldb/ldb_ldb/ldb_ldb.c

   1 /*
   2  * ldb connection and module initialisation
   3  *
   4  *  Copyright (C) Andrew Bartlett <abartlet@samba.org> 2018
   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 3 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, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20 #include "ldb_private.h"
  21 #include "../ldb_tdb/ldb_tdb.h"
  22 #ifdef HAVE_LMDB
  23 #include "../ldb_mdb/ldb_mdb.h"
  24 #endif /* HAVE_LMDB */
  25
  26 /*
  27   connect to the database
  28 */
  29 static int lldb_connect(struct ldb_context *ldb,
  30                         const char *url,
  31                         unsigned int flags,
  32                         const char *options[],
  33                         struct ldb_module **module)
  34 {
  35         const char *path;
  36         int ret;
  37
  38         /*
  39          * Check and remove the url prefix
  40          */
  41         if (strchr(url, ':')) {
  42                 if (strncmp(url, "ldb://", 6) != 0) {
  43                         ldb_debug(ldb, LDB_DEBUG_ERROR,
  44                                   "Invalid ldb URL '%s'", url);
  45                         return LDB_ERR_OPERATIONS_ERROR;
  46                 }
  47                 path = url+6;
  48         } else {
  49                 path = url;
  50         }
  51
  52         /*
  53          * Don't create the database if it's not there
  54          */
  55         flags |= LDB_FLG_DONT_CREATE_DB;
  56 #ifdef HAVE_LMDB
  57         /*
  58          * Try opening the database as an lmdb
  59          */
  60         ret = lmdb_connect(ldb, path, flags, options, module);
  61         if (ret == LDB_SUCCESS) {
  62                 return ret;
  63         }
  64         if (ret != LDB_ERR_UNAVAILABLE) {
  65                 return ret;
  66         }
  67
  68         /*
  69          * Not mdb so try as tdb
  70          */
  71 #endif /* HAVE_LMDB */
  72         ret = ltdb_connect(ldb, path, flags, options, module);
  73         return ret;
  74 }
  75
  76 int ldb_ldb_init(const char *version)
  77 {
  78         LDB_MODULE_CHECK_VERSION(version);
  79         return ldb_register_backend("ldb", lldb_connect, false);
  80 }