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#!/bin/sh
psupath=/sys/class/power_supply
warning_level=0 # 0 = not warned, 1 = warned, 2 = warned critical
sum_props() {
for prop in $(cat $psupath/*/$1); do sum=$(( $sum + $prop )); done
echo $sum
}
is_discharging() { cat $psupath/*/status | grep "Discharging" > /dev/null ; }
while true; do
capacity=$(( $(sum_props energy_now) * 100 / $(sum_props energy_full) ))
if is_discharging; then
if [ $capacity -le 5 ] && [ $warning_level -lt 2 ]; then
notify-send -u critical -w "Critical Low Battery Warning" "${capacity}% remains"
elif [ $capacity -le 20 ] && [ $warning_level -lt 1 ]; then
notify-send -u normal -w "Low Battery Warning" "${capacity}% remains"
fi
else
warning_level=0
fi
printf "\r%d%%" $capacity
sleep 3
done
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