Method open

src/SFML/Window/Unix/JoystickImpl.cpp:500–535

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bool JoystickImpl::open(unsigned int index)
{
    if (index >= joystickList.size())
        return false;

    if (joystickList[index].plugged)
    {
        const std::string devnode = joystickList[index].deviceNode;

        // Open the joystick's file descriptor (read-only and non-blocking)
        m_file = ::open(devnode.c_str(), O_RDONLY | O_NONBLOCK);
        if (m_file >= 0)
        {
            // Retrieve the axes mapping
            ioctl(m_file, JSIOCGAXMAP, m_mapping.data());

            // Get info
            m_identification.name = getJoystickName(index);

            if (udevContext)
            {
                m_identification.vendorId  = getJoystickVendorId(index);
                m_identification.productId = getJoystickProductId(index);
            }

            // Reset the joystick state
            m_state = JoystickState();

            return true;
        }

        err() << "Failed to open joystick " << devnode << ": " << errno << std::endl;
    }

    return false;
}


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