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Editorial Team
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Asked: 2026-05-26T00:39:23+00:00

I am trying out the eGalax touch screen driver for my touch screen, as

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I am trying out the eGalax touch screen driver for my touch screen, as an alternative to the evdev/xinput_calibrator combination.

The calibration tool that comes with the eGalax driver, TKCal, takes the device to which the touch screen is connected as a command line argument.

Now I would like to start the calibration tool from a bash script. Is there some smart way to determine the device within the script, instead of hard coding “/dev/hidraw0” as in this example:

TKCal /dev/hidraw0 Cal

I presume that I can’t rely on the touch screen landing on hidraw0 every time, can I? If I run my software on a different system, with a mouse and a keyboard and touch screen, I guess I have to handle that the devices can be conneted to different hdrawX devices. Please correct me if I am wrong.

Thank you very much!
/Fredrik Israelsson

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1 Answer

  1. Editorial Team

    Try looking at /sys/class/hidraw/hidraw*/device/uevent.

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