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#!/bin/sh

cd /sys/class/power_supply 2>/dev/null ||
	{ echo >&2 "The power_supply node doesn't exist in /sys -- not mounted?"; exit 1; }

for x in *; do
	[ -e "./$x/type" ] || continue
	ONLINE=$(cat "./$x/online" 2>/dev/null)
	PRESENT=$(cat "./$x/present" 2>/dev/null)
	#TYPE=$(cat "./$x/type" 2>/dev/null)
	STATUS=$(cat "./$x/status" 2>/dev/null)
	CAPACITY=$(cat "./$x/capacity" 2>/dev/null)
	HEALTH=$(cat "./$x/health" 2>/dev/null)
	ICON="?"

	if [ "$ONLINE" != 1 -a "$PRESENT" != 1 ]; then
		COLOR='1;30'; ICON=✗
	elif [ -z "$CAPACITY" ]; then
		COLOR="1"; ICON=✓
	else
		if [ $CAPACITY -lt 25 ]; then
			COLOR=31
		elif [ $CAPACITY -lt 50 ]; then
			COLOR=33
		elif [ $CAPACITY -lt 100 ]; then
			COLOR=32
		else
			COLOR=37
		fi

		case "$STATUS" in
		"Charging")	COLOR="$COLOR;1"; ICON="+";
			;;
		"Full")		COLOR="$COLOR;1"; ICON=•;
			;;
		"Not charging")	ICON=•;
			;;
		"Discharging")	ICON=-;
			;;
		esac
	fi

	case "$HEALTH" in
	Good|Unknown)	HEALTH=""
		;;
	esac

	if [ -t 1 ]; then
		C1="\e[0;${COLOR}m"
		C2="\e[0m"
	fi
	
	echo "$C1$ICON $x${CAPACITY:+ ($CAPACITY%)}${HEALTH:+ $HEALTH}$C2"
done

if [ -z "$ICON" ];then echo "No powers supply sensors; that's normal on a desktop.";fi

Zerion Mini Shell 1.0