supports both nut and apcupsd (with infinite loop)

powerfail (text/plain), 686 bytes, created by Ștefan Talpalaru on 2010-01-09 17:59:16 UTC

#!/sbin/runscript
# Copyright 1999-2009 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

depend() {
 need mount-ro
}

start() {
 local UPS_CTL UPS_POWERDOWN

 if [[ -f /etc/killpower ]] ; then
  UPS_CTL=/usr/sbin/upsdrvctl
  UPS_POWERDOWN="${UPS_CTL} shutdown"
 elif [[ -f /etc/apcupsd/powerfail ]] ; then
  UPS_CTL=/sbin/apcupsd
  UPS_POWERDOWN="${UPS_CTL} --killpower"
 else
  return 0
 fi

 if [[ $(runlevel) == *' 0' &&  -f ${UPS_CTL} ]] ; then
  ebegin 'Signaling UPS to kill power'
  ${UPS_POWERDOWN}
  eend $?
  ebegin 'Halt system and wait for the UPS to kill our power'
  /sbin/halt -id
  while [ 1 ]; do sleep 60; done
 fi
}