@Override
    public <T> T withFileLock(Supplier<T> factory) {
        throw failure();
    }

    protected UnsupportedOperationException failure() {
        return new UnsupportedOperationException("Cannot escalate a shared lock to an exclusive lock. This is not yet supported.");
    }

	}
	_, err := cmd.CombinedOutput()
	return err
}

const highPrivUser = "root"

func setSetuid(t *testing.T, user, bin string) {
	t.Helper()
	// We escalate privileges here even if we are root, because for some reason on some builders
	// (at least freebsd-amd64-13_0) the default PATH doesn't include /usr/sbin, which is where