statusbar-scripts/sb-battery

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#!/bin/sh
. sb-theme
# Loop through all attached batteries and format the info
for battery in /sys/class/power_supply/BAT?*; do
# If non-first battery, print a space separator.
[ -n "${capacity+x}" ] && printf " "
# Sets up the status and capacity
case "$(cat "$battery/status")" in
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"Full") status="󰁹 " ;;
"Discharging") status="󱟤 " ;;
"Charging") status="󰂅 " ;;
"Not charging") status="󰁾 " ;;
"Unknown") status="󰂃 " ;;
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esac
capacity=$(cat "$battery/capacity")
# Will make a warn variable if discharging and low
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[ "$status" = "󰁺 " ] && [ "$capacity" -le 25 ] && warn="low"
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# Prints the info
display "$status$warn$capacity%" $1; unset warn
done && exit 0