Created
September 18, 2019 02:56
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bash script to give USB device information from a node in /dev
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| #!/bin/bash | |
| # Brian Ronald, 2019 | |
| # Tested in Ubuntu 18.04 | |
| # Free for all purposes, no warranty at all. | |
| if [ $# -eq 0 ] | |
| then | |
| echo "Usage: $0 <block device node>" | |
| echo "Show the USB device associated with a block device" | |
| exit | |
| fi | |
| if [ ! -b $1 ] | |
| then | |
| echo "Specified argument is not a block device node" | |
| exit 1 | |
| fi | |
| # Ask lsblk for the major and minor nodes, using xargs to strip whitespace | |
| BlockDevice=$(lsblk -ldn $1 -oMAJ:MIN | xargs) | |
| # Look at the device file symlinked in /sys/dev/block to get the device path | |
| DevicePath=$(readlink -f /sys/dev/block/$BlockDevice) | |
| # Look at the path to determine the presence of a USB device | |
| USBPath=$(echo $DevicePath | grep -Po '^/.*usb./.*?/') | |
| if [ -z $USBPath ] | |
| then | |
| echo "Specified device is not connected to USB" | |
| exit 2 | |
| fi | |
| # Use the busnum and devnum to get the USB information from lsusb | |
| lsusb -s $(cat $USBPath/busnum):$(cat $USBPath/devnum) |
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