File indexing completed on 2024-05-12 17:07:16

 /*
     SPDX-FileCopyrightText: 2015 David Rosca <nowrep@gmail.com>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "udev_helper.h"
 #include "debug.h"
 
 #include <QSocketNotifier>
 
 #include <config-keyboard.h>
 
 #if HAVE_UDEV
 #include <libudev.h>
 #endif
 
 // Based on qtbase: src/platformsupport/devicediscovery/qdevicediscovery_udev.cpp
 
 UdevDeviceNotifier::UdevDeviceNotifier(QObject *parent)
     : QObject(parent)
     , m_udev(nullptr)
     , m_monitor(nullptr)
 {
     init();
 }
 
 #if HAVE_UDEV
 UdevDeviceNotifier::~UdevDeviceNotifier()
 {
     if (m_monitor) {
         udev_monitor_unref(m_monitor);
     }
     if (m_udev) {
         udev_unref(m_udev);
     }
 }
 
 void UdevDeviceNotifier::init()
 {
     m_udev = udev_new();
     if (!m_udev) {
         return;
     }
 
     m_monitor = udev_monitor_new_from_netlink(m_udev, "udev");
     if (!m_monitor) {
         return;
     }
 
     udev_monitor_filter_add_match_subsystem_devtype(m_monitor, "input", 0);
     udev_monitor_enable_receiving(m_monitor);
 
     int monitor_fd = udev_monitor_get_fd(m_monitor);
     QSocketNotifier *notifier = new QSocketNotifier(monitor_fd, QSocketNotifier::Read, this);
     connect(notifier, &QSocketNotifier::activated, this, &UdevDeviceNotifier::socketActivated);
 }
 
 void UdevDeviceNotifier::socketActivated()
 {
     static const char *keyboardDevice[] = {"ID_INPUT_KEYBOARD", "ID_INPUT_KEY"};
 
     static const char *pointerDevice[] = {"ID_INPUT_MOUSE", "ID_INPUT_TOUCHPAD", "ID_INPUT_TABLET"};
 
     struct udev_device *dev = udev_monitor_receive_device(m_monitor);
     if (!dev) {
         return;
     }
 
     const char *action = udev_device_get_action(dev);
     if (!action || qstrcmp(action, "add") != 0) {
         udev_device_unref(dev);
         return;
     }
 
     // Skip devices with empty name
     if (!udev_device_get_property_value(dev, "NAME")) {
         udev_device_unref(dev);
         return;
     }
 
     for (unsigned i = 0; i < sizeof(keyboardDevice) / sizeof(keyboardDevice[0]); ++i) {
         if (qstrcmp(udev_device_get_property_value(dev, keyboardDevice[i]), "1") == 0) {
             qCDebug(KCM_KEYBOARD) << "New Udev keyboard device";
             Q_EMIT newKeyboardDevice();
             break;
         }
     }
 
     for (unsigned i = 0; i < sizeof(pointerDevice) / sizeof(pointerDevice[0]); ++i) {
         if (qstrcmp(udev_device_get_property_value(dev, pointerDevice[i]), "1") == 0) {
             qCDebug(KCM_KEYBOARD) << "New Udev pointer device";
             Q_EMIT newPointerDevice();
             break;
         }
     }
 
     udev_device_unref(dev);
 }
 
 #else
 UdevDeviceNotifier::~UdevDeviceNotifier()
 {
 }
 
 void UdevDeviceNotifier::init()
 {
 }
 
 void UdevDeviceNotifier::socketActivated()
 {
 }
 #endif