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#!/bin/sh
bat()
{
eval "$(cat /sys/class/power_supply/BAT0/uevent | grep -E \
'^POWER_SUPPLY_(STATUS|ENERGY_)')"
percentage=$(printf 'scale = 0; %d * 100 / %d;\n' \
${POWER_SUPPLY_ENERGY_NOW} ${POWER_SUPPLY_ENERGY_FULL} | bc)
case "${POWER_SUPPLY_STATUS}" in
'Unknown')
status='？'
;;
'Charging')
status='⚡'
;;
'Discharging')
status='🔋'
;;
'Not charging')
status='！'
;;
'Full')
status='🔌'
;;
esac
printf '%s%3d%%\n' "${status}" ${percentage}
}
ac()
{
status='🔌'
printf '%s\n' "${status}"
}
main()
{
if [ -e /sys/class/power_supply/BAT0/uevent ]; then
bat
else
ac
fi
}
main "${@}"
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