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#!/bin/env sh
# INIT
printf "$$" > ~/.cache/pidofbar
sec=0
# MODULES
update_cpu () {
cpu=" $(grep -o "^[^ ]*" /proc/loadavg )"
}
update_memory () {
memory=" $(free -h | sed -n "2s/\([^ ]* *\)\{2\}\([^ ]*\).*/\2/p")"
}
update_time () {
time="$(date "+[ %a %d %b ] [ %I:%M %P ]")"
}
# update_bat () {
# # you might need to change the path depending on your device
# read -r bat_status </sys/class/power_supply/BAT1/status
# read -r bat_capacity </sys/class/power_supply/BAT1/capacity
# bat="$bat_status $bat_capacity%"
# }
update_vol () {
vol="$([ "$(pamixer --get-mute)" = "false" ] && printf ' ' || printf ' ')$(pamixer --get-volume)%"
}
# For calcurse users, refer https://github.com/pystardust/automeet
#update_event () {
# event="$(calcurse -n | sed 1d | \
# sed -E "s_^ *\[(.*):(.*)\] ([^\t]*)\t?.*_[\1h \2m->\3]_")"
# [ "[]" = "$event" ] && event=""
#}
# modules that don't update on their own need to be run at the start for getting their initial value
update_vol
display () {
#printf "%s\n" " $event [$weather] [$memory $cpu] [$bat] [$backlight] [$vol] $time "
xsetroot -name " [ $vol ] [ $memory $cpu ] $time "
}
# SIGNALLING
# trap "<function>;display" "RTMIN+n"
trap "update_vol;display" "RTMIN"
# trap "update_bat;display" "RTMIN+2"
# to update it from external commands
## kill -m "$(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 # update time every 5 seconds
[ $((sec % 5)) -eq 0 ] && update_cpu # update cpu every 15 seconds
[ $((sec % 15)) -eq 0 ] && update_memory
# [ $((sec % 60)) -eq 0 ] && update_bat
#[ $((sec % 300)) -eq 1 ] && update_event
# how often the display updates ( 5 seconds )
[ $((sec % 5 )) -eq 0 ] && display
sec=$((sec + 1))
}
done
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