1 files changed, 80 insertions, 0 deletions
diff --git a/servers/slapd/back-bdb/nextid.c b/servers/slapd/back-bdb/nextid.c
new file mode 100644
index 0000000..caad4f6
--- /dev/null
+++ b/servers/slapd/back-bdb/nextid.c
@@ -0,0 +1,80 @@
+/* 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;
+}