init.d script to manage acpi wakeup devices for Surface Pro

acpi_wakeup

#! /bin/sh
### BEGIN INIT INFO
# Provides:          acpi_wakeup
# Required-Start:    $remote_fs $syslog $all
# Required-Stop:     0 6
# Default-Start:     1 2 3 4 5
# Default-Stop:
# Short-Description: Disable acpi wakeup for given devices
### END INIT INFO


DEVICES_REGEXP="(EHC1|EHC2|XHC).*enabled"
AWK_CMD='BEGIN {FS = "\t"}; '"/$DEVICES_REGEXP/ { print \$1}"
PATH=/sbin:/usr/sbin:/bin:/usr/bin

. /lib/init/vars.sh
. /lib/lsb/init-functions

status() {
  if [ -e /proc/acpi/wakeup ]; then
    if [ ! "$(cat /proc/acpi/wakeup | awk "$AWK_CMD")" = "" ]; then
      echo "ACPI Wakeup devices have not been set"
      exit 1
    else
      echo "ACPI Wakeup devices have been set"
      exit 0
    fi
  else
    echo "/proc/acpi/wakeup is not available"
    exit 1
  fi
}

case "$1" in
  force-reload|reload|restart|start)
    if [ -e /proc/acpi/wakeup ]; then
      ACTIVE_DEVICES=$(cat /proc/acpi/wakeup | awk "$AWK_CMD")
      for DEVICE in $ACTIVE_DEVICES; do
        echo $DEVICE > /proc/acpi/wakeup
      done
      status
    fi
  ;;
  status)
    status
  ;;
  stop)
    echo "Warning: Stop action is noop."
    status
  ;;
  *)
    echo "Usage: $0 force-reload|reload|restart|start|status|stop" >&2
    exit 3
  ;;
esac