BASH scripted i3 status
https://github.com/i3/i3/blob/next/contrib/trivial-bar-script.sh
killall i3bar ; echo "" > i3bar.bar-0.log; for c in $(i3-msg -t get_bar_config | python -c \
'import json,sys;print("\n".join(json.load(sys.stdin)))'); do \
(i3bar --bar_id=$c >i3bar.$c.log 2>&1) & \
done;