ziso

#!/bin/bash
for device in /sys/block/sd*; do disk="/dev/${device##*/}"
    if [[ ! $(lsblk -no mountpoint "$disk") ]]; then
        disks+=("$disk")
        disks+=("$(numfmt --to=iec-i --suffix=B --padding=7 < "$device/size")")
    fi  
done
if (( ${#disks[*]} < 2 )); then
    zenity --info --title "Error" --width=300\
    --text "No usable disks found, try unmounting the disk you wish to write!"
    exit 1
fi
disk=$(zenity --list --title "Choose a disk to write"\
 --column "Disk" --column "Size" "${disks[@]}")
if [[ "${device[*]}" =~ $disk ]]; then
    zenity --info --title "Error" --width 300\
    --text "Please select a device to write to!"
    exit 1
fi
iso=$(zenity --title "Select an ISO file" --file-selection --file-filter="*.iso")
if [[ "$iso" != *.iso ]]; then
    zenity --info --title "Error" --width=300\
    --text "Please select an ISO file to write!"
    exit 1
fi
zenity --question --title "Confirm the write" --width 500\
       --text "Write $iso to $disk?"
case $? in
    0) sudo cp "$iso" "$disk" | zenity --progress --pulsate --width 600\
        --title "Writing ISO to USB" --text "Writing $iso to $disk";;    
    1) exit 1;;
esac