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/* init.c - initialize bdb backend */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2000-2021 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include "back-bdb.h"
int bdb_next_id( BackendDB *be, ID *out )
{
struct bdb_info *bdb = (struct bdb_info *) be->be_private;
ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
*out = ++bdb->bi_lastid;
ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
return 0;
}
int bdb_last_id( BackendDB *be, DB_TXN *tid )
{
struct bdb_info *bdb = (struct bdb_info *) be->be_private;
int rc;
ID id = 0;
unsigned char idbuf[sizeof(ID)];
DBT key, data;
DBC *cursor;
DBTzero( &key );
key.flags = DB_DBT_USERMEM;
key.data = (char *) idbuf;
key.ulen = sizeof( idbuf );
DBTzero( &data );
data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL;
/* Get a read cursor */
rc = bdb->bi_id2entry->bdi_db->cursor( bdb->bi_id2entry->bdi_db,
tid, &cursor, 0 );
if (rc == 0) {
rc = cursor->c_get(cursor, &key, &data, DB_LAST);
cursor->c_close(cursor);
}
switch(rc) {
case DB_NOTFOUND:
rc = 0;
break;
case 0:
BDB_DISK2ID( idbuf, &id );
break;
default:
Debug( LDAP_DEBUG_ANY,
"=> bdb_last_id: get failed: %s (%d)\n",
db_strerror(rc), rc, 0 );
goto done;
}
bdb->bi_lastid = id;
done:
return rc;
}
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