fix(bluetooth): make bluetooth rules more strict

Only warn if bluetooth kernel module is loaded
at the time of initrd generation in hostonly mode.

Author: LaszloGombos

modules.d/62bluetooth/module-setup.sh

@@ -8,11 +8,12 @@ check() {
     require_any_binary /usr/lib/bluetooth/bluetoothd /usr/libexec/bluetooth/bluetoothd || return 1
 
     if [[ $hostonly ]]; then
-        # Warn user if a Peripheral (0x500) is found of minor class:
+        # Warn user if bluetooth kernel module is loaded
+        # and if Peripheral (0x500) is found of minor class:
         #  * Keyboard (0x40)
         #  * Keyboard/pointing (0xC0)
         # and if Appearance is set to the value defined for keyboard (0x03C1)
-        grep -qiE -e 'Class=0x[0-9a-f]{3}5[4c]0' -e 'Appearance=0x03c1' /var/lib/bluetooth/*/*/info 2> /dev/null \
+        [ -d "/sys/class/bluetooth" ] && grep -qiE -e 'Class=0x[0-9a-f]{3}5[4c]0' -e 'Appearance=0x03c1' /var/lib/bluetooth/*/*/info 2> /dev/null \
             && dwarn "If you need to use bluetooth, please include it explicitly."
     fi