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dotfiles/.local/bin/statusbar/sb-cpu

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#!/usr/bin/env sh
# Module showing CPU load as a changing bars.
# Just like in polybar.
# Each bar represents amount of load on one core since
# last run.
# Cache in tmpfs to improve speed and reduce SSD load
cache=/tmp/cpubarscache
# id total idle
stats=$(awk '/cpu[0-9]+/ {printf "%d %d %d\n", substr($1,4), ($2 + $3 + $4 + $5), $5 }' /proc/stat)
[ ! -f $cache ] && echo "$stats" > "$cache"
old=$(cat "$cache")
printf " %s " " "
echo "$stats" | while read -r row; do
id=${row%% *}
rest=${row#* }
total=${rest%% *}
idle=${rest##* }
case "$(echo "$old" | awk '{if ($1 == id)
printf "%d\n", (1 - (idle - $3) / (total - $2))*100 /12.5}' \
id="$id" total="$total" idle="$idle")" in
"0") printf "▁";;
"1") printf "▂";;
"2") printf "▃";;
"3") printf "▄";;
"4") printf "▅";;
"5") printf "▆";;
"6") printf "▇";;
"7") printf "█";;
"8") printf "█";;
esac
done; printf " \\n"
echo "$stats" > "$cache"