Display which services are in the process of shutting down (s6)

shutdown-status.sh

#!/bin/bash
sp='\|/-'
i=1
cd /var/run/s6/services
while :; do
  services=$(for s in *; do s6-svstat $s 2> /dev/null | grep -q 'want down' && echo $s || true; done)
  [ -n "$services" ] || break
  echo -ne "[s6-finish] waiting for: $services ${sp:i++%${#sp}:1} \r"
  sleep 0.2
done