evemu-recordThis is a Rust implementation of the evemu-record command from the FreeDesktop project's evemu suite. It records the descriptor and events produced by a single input device in a simple text-based format that can be replayed using the uinput command on Android or the FreeDesktop evemu tools on other Linux-based platforms. It is included by default with userdebug and eng builds of Android.
The command-line interface is the same as that of the FreeDesktop version, except for Android-specific features. For usage instructions, run evemu-record --help.
From a computer connected to the device over ADB, you can start a recording:
$ adb shell evemu-record > my-recording.evemu Available devices: /dev/input/event0: gpio_keys /dev/input/event1: s2mpg12-power-keys /dev/input/event2: NVTCapacitiveTouchScreen /dev/input/event3: NVTCapacitivePen /dev/input/event4: uinput-folio /dev/input/event5: ACME Touchpad Select the device event number [0-5]: 5
...then use the input device for a while, and press Ctrl+C to finish. You will now have a my-recording.evemu file that you can examine in a text editor. To replay it, use the uinput command:
$ adb shell uinput - < my-recording.evemu
By default, event timestamps are recorded relative to the time of the first event received during the recording. Passing --timestamp-base=boot causes the timestamps to be recorded relative to the system boot time instead. While this does not affect the playback of the recording, it can be useful for matching recorded events with other logs that use such timestamps, such as dmesg or the touchpad gesture debug logs emitted by TouchpadInputMapper.