check_ub_res
check_ub_res(ub_ctx_set_option(ctx, "target-fetch-policy:", "0 0 0 0 0"));
check_ub_res(ub_ctx_set_option(ctx, "do-ip6:", "no"));
check_ub_res(ub_ctx_set_option(ctx, "do-ip4:", "no"));
check_ub_res(ub_ctx_config(ctx, optarg));
check_ub_res(ub_ctx_add_ta_file(ctx, ROOT_ANCHOR_FILE));
check_ub_res(ub_ctx_resolvconf(ctx, "/etc/resolv.conf"));
check_ub_res(ub_ctx_add_ta(ctx, optarg));
check_ub_res(ub_ctx_add_ta_file(ctx, optarg));
check_ub_res(ub_ctx_trustedkeys(ctx, optarg));
check_ub_res(ub_ctx_debuglevel(ctx, debuglevel));
check_ub_res(ub_ctx_set_option(ctx,