zenUtils/batAlarm.sh

#!/bin/sh

# Just a background script to tell you when your battery's low if you don't
# have a panel.
# Iris Lightshard <nilix@nilfm.cc>
# MIT License

warn=30
crit=20
dismissed=0

while true; do
  charge=$(cat /sys/class/power_supply/BAT0/capacity)
  if [ $charge -lt $(($crit + 1)) ]; then
      notify-send -c power -t 100000 battery [${charge}%]
  elif [ $charge -lt $(($warn + 1)) ]; then
    if [ $dismissed -eq 0 ]; then
      dismissed=1
      notify-send -c power -t 1000000 battery [${charge}%]
    fi
  fi

  if [ $charge -gt $warn ]; then
    dismissed=0
  fi
  
  sleep 60
done