+ if which grub >/dev/null 2>&1 ; then
+ echo 'quit' | grub --device-map="$device_map" >/dev/null 2>&1
+ elif which grub-mkdevicemap >/dev/null 2>&1 ; then
+ grub-mkdevicemap --device-map="$device_map" >/dev/null 2>&1
+ else
+ echo "Error: neither grub nor grub-mkdevicemap command found." >&2
+ return 1