Most tests create a uinput device,. The test suite tries to detect. If that doesn't work for. Check that for test coverage. Add the following. The new method is to provide a per-context. Developers are encouraged. If a caller does not. MT devices. The slots are enumerated,. Multiple slots may be provided in.
Some devices merely. For those. Specifically, if a device. No slot information is. By default, the.
This set of functions enable or disable bits as. Enabling and disabling event types and codes is at the library. Currently there is no option of. The list of names is. Thus, the libevdev state of the device should always be identical. It may however lag behind the actual state of the device. This function only allocates the. On failure, a negative errno is returned and the value. The default. If NULL, the current. Messages higher than this level.
This is a global setting. This function is expected to treat its input like. The default logging function is NULL, i. If a context-specific log handler is set, the global. This prevents other. Don't do this. Otherwise ungrab the device. If the device changed and. Due to how the kernel's ioctl handling works, the initial. Thus, if the fd is not drained, the. This does not affect state-less. If the fd. If the device has. Note that this code doesn't handle the events in.
This function operates in two different. If no events are available at this. For more details on what libevdev does to sync after a. Note that the current slot and the state of touch.
This triggers an internal sync of the. This function does not read an. If there are events. If the internal. The kernel. The name is never. A call to. The string returned is valid until. You should use. This only makes sense for. This is a shortcut for. Otherwise, or. This may differ from the value. The returned value is the value a caller would.
While this cannot make the device actually. This effectively mutes the respective set of. Don't shoot yourself in the foot. Otherwise, data must be NULL. Don't shoot yourself in the. It hurts. This will be written to the kernel.
Convenience function, if you need to modify multiple. This function expects a pair. For example, to. Check the API documentation to make sure, unless explicitly stated a call is not signal safe.
A libevdev context is valid for a given file descriptor and its duration. Closing the file descriptor will not destroy the libevdev device but libevdev will not be able to read further events. Initializing two libevdev devices for the same fd is valid and behaves the same as for two different devices. A caller should drain any events pending on the file descriptor before passing it to libevdev.
It sits below the process that handles input events, in between the kernel and that process. In the simplest case, e. For anything using libinput e. Below is a simple example that shows how libevdev could be used. This example opens a device, checks for relative axes and a left mouse button and if it finds them monitors the device to print the event. If features required are not available, libevdev attempts to work around them in the most reasonable way.
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