k5db2_dbopen
db = k5db2_dbopen(db_ctx, name, O_RDONLY, 0, tempdb);
db = k5db2_dbopen(db_ctx, db_ctx->db_name,
db = k5db2_dbopen(db_ctx, db_name, O_RDWR | O_CREAT | O_EXCL, 0600, db_ctx->tempdb);