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#!/bin/bash
# dotfiles -- scripts/battery.sh
# author: johannst
bat="${BLOCK_INSTANCE:-BAT0}"
[[ ! -f "/sys/class/power_supply/$bat/type" ]] && exit 1
# Auto-detect file prefix for battery files
for prefix in energy charge; do
[[ -f "/sys/class/power_supply/$bat/${prefix}_now" ]] && {
file_prefix=$prefix
break
}
done && test -n $file_prefix || exit 1
show_bat_use_design_capacity=0
show_bat_status=0
show_bat_color_output=0
for arg in "$@"; do
case $arg in
-dc | --design_capacity) show_bat_use_design_capacity=1
;;
-s | --status) show_bat_status=1
;;
-c | --color) show_bat_color_output=1
;;
*) # ignore unknown
;;
esac
done
# Unknown, Charging, Discharging, Full
BAT_STATUS=$(cat /sys/class/power_supply/$bat/status)
BAT_NOW=$(cat /sys/class/power_supply/$bat/${file_prefix}_now)
[[ $show_bat_use_design_capacity == 1 ]] \
&& BAT_FULL=$(cat /sys/class/power_supply/$bat/${file_prefix}_full_design) \
|| BAT_FULL=$(cat /sys/class/power_supply/$bat/${file_prefix}_full)
BAT_POWER=$(echo $BAT_NOW $BAT_FULL | awk '{ print int($1 * 100 / $2); }')
OUT="$BAT_POWER%"
[[ $show_bat_status == 1 ]] && \
case $BAT_STATUS in
Charging) OUT="$OUT (Charging)"
;;
*) # only show charging state for now
;;
esac
echo "$OUT"
[[ $show_bat_color_output == 1 ]] && {
# print twice, else colors not working?!
echo ""
if [[ $BAT_POWER -ge 80 ]]; then
# green
echo "#00FF00"
elif [[ $BAT_POWER -ge 60 ]]; then
# yellow
echo "#FFF600"
elif [[ $BAT_POWER -ge 40 ]]; then
# dark orange
echo "#FFAE00"
else
# red
echo "#FF0000"
fi
}
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