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#!/bin/sh
Threshold=5
GetBatteryCapacity()
{
File="$(find /sys/class/power_supply \
-maxdepth 1 \
-type l \
-name 'BAT*' |
head -n 1)"
cat "$File"/capacity
}
PrevCapacity="$(GetBatteryCapacity)"
[ "$PrevCapacity" ] || exit 1
while true
do
sleep 5
Capacity="$(GetBatteryCapacity)"
if [ "$Capacity" -lt "$PrevCapacity" ]
then
if [ "$Capacity" -le "$Threshold" ]
then
setsid slock
HostName="$(hostname)"
if [ "$HostName" = "spring" ]
then
doas /usr/sbin/zzz -Z
elif [ "$HostName" = "winter" ]
then
systemctl hibernate
fi
fi
PrevCapacity="$Capacity"
fi
done
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