[udev] Fixes #2654, ID_INPUT_KEY devices are ignored. Also added some references to udev code where these flags are set.
diff --git a/src/core/linux/SDL_udev.c b/src/core/linux/SDL_udev.c
index 31b8f5f..5850183 100644
--- a/src/core/linux/SDL_udev.c
+++ b/src/core/linux/SDL_udev.c
@@ -398,6 +398,8 @@ device_event(SDL_UDEV_deviceevent type, struct udev_device *dev)
if (SDL_strcmp(subsystem, "sound") == 0) {
devclass = SDL_UDEV_DEVICE_SOUND;
} else if (SDL_strcmp(subsystem, "input") == 0) {
+ /* udev rules reference: http://cgit.freedesktop.org/systemd/systemd/tree/src/udev/udev-builtin-input_id.c */
+
val = _this->udev_device_get_property_value(dev, "ID_INPUT_JOYSTICK");
if (val != NULL && SDL_strcmp(val, "1") == 0 ) {
devclass |= SDL_UDEV_DEVICE_JOYSTICK;
@@ -408,7 +410,13 @@ device_event(SDL_UDEV_deviceevent type, struct udev_device *dev)
devclass |= SDL_UDEV_DEVICE_MOUSE;
}
- val = _this->udev_device_get_property_value(dev, "ID_INPUT_KEYBOARD");
+ /* The undocumented rule is:
+ - All devices with keys get ID_INPUT_KEY
+ - From this subset, if they have ESC, numbers, and Q to D, it also gets ID_INPUT_KEYBOARD
+
+ Ref: http://cgit.freedesktop.org/systemd/systemd/tree/src/udev/udev-builtin-input_id.c#n183
+ */
+ val = _this->udev_device_get_property_value(dev, "ID_INPUT_KEY");
if (val != NULL && SDL_strcmp(val, "1") == 0 ) {
devclass |= SDL_UDEV_DEVICE_KEYBOARD;
}