Question

4

Find USB device's directory /sys/bus/usb/devices/ using idVendor/idProduct

rated 0 times [ 4] [ 0] / answers: 1 / hits: 7498 / 2 Years ago, fri, june 17, 2022, 2:46:54

I'm trying to make a script that takes the product and vendor id printed by using lsusb, then checking against this ID to find the USB device's directory in /sys/bus/usb/devices.

I initially thought the Bus and Device number printed by lsusb would point to the appropriate folder. For example, if Bus = 002 and Device = 002, the USB's directory would be /usb/devices/2-2. Unfortunately, this turned out to not be the case.

I can manually find the appropriate folder using this command I found in another thread:

for X in /sys/bus/usb/devices/*; do 

    echo "$X"

    cat "$X/idVendor" 2>/dev/null 

    cat "$X/idProduct" 2>/dev/null

    echo

done

However, I need a script that can automate finding this folder.

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tionverflow

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answered 2 Years ago ersoggles · Accepted Answer

If I understood your question, the following script should do the job:

#!/bin/bash



if [ $# -ne 2 ];then

  echo "Usage: `basename $0` idVendor idProduct"

  exit 1

fi





for X in /sys/bus/usb/devices/*; do 

    if [ "$1" == "$(cat "$X/idVendor" 2>/dev/null)" -a "$2" == "$(cat "$X/idProduct" 2>/dev/null)" ]

    then

        echo "$X"

    fi

done