sxmo-utils/scripts/core/sxmo_statusbar.sh

#!/usr/bin/env sh
pgrep -f sxmo_statusbar.sh | grep -v $$ | xargs kill -9

UPDATEFILE=/tmp/sxmo_bar
touch "$UPDATEFILE"

update() {
	# M symbol if modem monitoring is on & modem present
	MODEMMON=""
	pgrep -f sxmo_modemmonitor.sh && MODEMMON="M "

	# Battery pct
	PCT="$(cat /sys/class/power_supply/*-battery/capacity)"
	BATSTATUS="$(
		cat /sys/class/power_supply/*-battery/status |
		cut -c1
	)"

	# Volume
	AUDIODEV="$(sxmo_audiocurrentdevice.sh)"
	[ "$AUDIODEV" = "None" ] && VOL="" || VOL=$(echo "$AUDIODEV" | cut -c1 | tr L S)"$(
		amixer sget "$AUDIODEV" |
		grep -oE '([0-9]+)%' |
		tr -d ' %' |
		awk '{ s += $1; c++ } END { print s/c }'  |
		xargs printf %.0f
	)"

	# Time
	TIME="$(date +%R)"

	BAR=" ${MODEMMON}${VOL} ${BATSTATUS}${PCT}% ${TIME}"
	xsetroot -name "$BAR"
}

# E.g. on first boot justs to make sure the bar comes in quickly
update && sleep 1 && update && sleep 1 && update

periodicupdate() {
	while :
	do
		echo 1 > "$UPDATEFILE"
		sleep 30
	done
}

periodicupdate &

while :
do
	update
	inotifywait -e MODIFY "$UPDATEFILE"
done