keychron enable / disable bash function so it can be modified via keychron's web UI

keychronctl.sh

# this creates a (ba)sh function, so if you want to use it source it in your shell.
# Or copy it into it for a one time use

# enable/disable keychron keyboard to be editable from the web UI 
# e.g. Don't trust the web UI to modify my keyboard by default

keychronctl() {
  local action=$1

  echo "🔍 Scanning Keychron devices (excluding 'Link' interfaces)..."

  # Collect only Keychron non-Link devices
  mapfile -t devices < <(
    for i in /dev/hidraw*; do
      if udevadm info -a -n "$i" | grep -q "Keychron"; then
        local product
        product=$(udevadm info -a -n "$i" | grep 'ATTRS{product}' | head -1 | awk -F'==' '{print $2}' | tr -d '"')
        if [[ ! "$product" =~ [Ll]ink ]]; then
          echo "$i"
        fi
      fi
    done
  )

  if [[ ${#devices[@]} -eq 0 ]]; then
    echo "⚠️  No Keychron non-Link HID devices found."
    return 1
  fi

  if [[ -z $action ]]; then
    echo "Usage: keychronctl <enable|disable>"
    echo 
    echo "This will enable or disable all of the following devices:"
    echo 
    printf '  %s\n' "${devices[@]}"
    return 1
  fi

  echo "Found devices:"
  printf '  %s\n' "${devices[@]}"
  echo

  for dev in "${devices[@]}"; do
    case $action in
      enable)
        echo "✅ Enabling $dev (adding rw for group and others)..."
        sudo chmod o+rw,g+rw "$dev"
        ls -lah "$dev"
        ;;
      disable)
        echo "🚫 Disabling $dev (removing rw for group and others)..."
        sudo chmod o-rw,g-rw "$dev"
        ls -lah "$dev"
        ;;
      *)
        echo "❌ Unknown action: $action (use enable or disable)"
        return 1
        ;;
    esac
  done
}