#! /bin/bash
renice >/dev/null +19 -p $$
ionice -c3 -p $$
t=/tmp/upsc-log.$$
rm -f $t $t.*
log=/var/log/upsc.log
exec >>$log 2>&1
while sleep 1;do
  date --iso=seconds >$t.t
  upsc eaton &>$t
  if grep -q '^ups.status: OL$' $t && grep -q '^battery.charge: 100$' $t;then
    rm -f $t.bad $t.bad.t
    if [ ! -e $t.good ];then
      cat $t.t $t;echo
      sync -d $log
    fi
    mv -f $t.t $t.good.t
    mv -f $t   $t.good
    rm -f /tmp/upsc-smsed
    continue
  fi
  if [ ! -e /tmp/upsc-smsed ];then
    touch /tmp/upsc-smsed
    date --iso=seconds|mail -s "upsc-log $(hostname)" jankratochvil@vodafonemail.cz
  fi
  if [ -e $t.good ];then
    cat   $t.good.t $t.good;echo
    sync -d $log
    rm -f $t.good.t $t.good
  fi
  if [ -e $t.bad ] && cmp -s $t $t.bad;then
    continue
  fi
  cat $t.t $t;echo
  sync -d $log
  mv -f $t.t $t.bad.t
  mv -f $t   $t.bad
done