enum-usbblock.sh

enum-usbblock.sh

#!/bin/bash

# /sys/block/sdb/removable
function check_removable() {
    devicename=$1
    removable=$(cat /sys/block/$devicename/removable)

    if [ x$check_removable = x"1" ] ; then
        echo $devicename
    fi
}

# /sys/block/sdb/size
function check_size() {
    devicename=$1
    limit_gb=$2

    blocksize=$(cat /sys/block/$devicename/size)
    blocksize_gb=$(( $blocksize * 512 / 1000 / 1000 / 1000 ))

    if [ $limit_gb -gt 0 ]; then
        if [ $blocksize_gb -lt $limit_gb ] ; then
            echo $devicename
        fi
    fi
}

DEVICES=$(ls /dev/disk/by-id/usb* -1 | xargs readlink -f | grep -E '[a-z]+$' | sed -e 's!.*/\([a-z]\+\)!\1!')

for device in $DEVICES
do
    check_removable $device | check_size $device 129
done