disable/enable wake up of ACPI devices

wakeup.sh

#!/bin/sh
wakeup(){
wakeup=/proc/acpi/wakeup
if [ "$#" -lt 2 ]; then
    devices=$(grep -e 'bled' $wakeup | cut -f 1 | tr -s '\n' ' ')
    echo "$0 disable|enable [ $devices]"
    return 1
fi
case $1 in
    *dis*) state="enabled" ; msg="disabling" ;;
    *en*) state="disabled" ; msg="enabling" ;;
    *) return 1 ;;
esac
matches=$(grep -e "$state" $wakeup | cut -f 1)
[ -z "$matches" ] && return 0
shift
for d in $* ; do
    case $matches in *$d*) echo "$d is $state, $msg" ; echo $d >$wakeup ;; esac
done
}

wakeup $*