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#!/bin/env sh
# INIT
printf "$$" > ~/.cache/pidofbar
sec=0
update_memory () {
memory="$(free -h | sed -n "2s/\([^ ]* *\)\{2\}\([^ ]*\).*/\2/p")"
}
update_time () {
time="$(date "+[ %a %d %b ] [ %I:%M %P ]")"
}
update_bat () {
# you might need to change the path depending on your device
read -r bat_status </sys/class/power_supply/BAT0/status
read -r bat_capacity </sys/class/power_supply/BAT0/capacity
if [ "$bat_status" = "Charging" ]; then
bat_status=""
elif [ "$bat_capacity" -gt 80 ]; then
bat_status=""
elif [ "$bat_capacity" -gt 60 ]; then
bat_status=""
elif [ "$bat_capacity" -gt 40 ]; then
bat_status=""
elif [ "$bat_capacity" -gt 20 ]; then
bat_status=""
else
bat_status=""
fi
bat="$bat_status $bat_capacity%"
}
update_vol () {
vol="$([ "$(pamixer --get-mute)" = "false" ] && printf ' ' || printf ' ')$(pamixer --get-volume)%"
}
# We have to run this only once.
update_vol
display () {
xsetroot -name "[ $memory ] [ $vol ] $time"
}
# Handling receiving signal
# RTMIN = 34 (always)
trap "update_vol;display" "RTMIN"
## kill -m "$(cat ~/.cache/pidofbar)"
# where m = 34 + n
while true
do
sleep 1 &
wait && {
# to update item ever n seconds with a offset of m
## [ $((sec % n)) -eq m ] && udpate_item
[ $((sec % 5 )) -eq 0 ] && update_time
[ $((sec % 15)) -eq 0 ] && update_memory
# how often the display updates ( 5 seconds )
[ $((sec % 5 )) -eq 0 ] && display
sec=$((sec + 1))
}
done
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