#! /bin/bash
boot="boot $* boot=$(uptime -s) $(uptime -p)"
echo "$(date --iso=seconds) uninit-time $boot" >>/var/log/shutdown-detect.log
# Raspberry Pi 3B+: 15 sec
sleep 60
echo "$(date --iso=seconds)   init-time $boot" >>/var/log/shutdown-detect.log
if [ -e /var/log/shutdown-detect.ok ];then
  rm -f /var/log/shutdown-detect.ok
  exit 0
fi
echo "$(date --iso=seconds) unclean shutdown"|tee -a /var/log/shutdown-detect.log|mail -s "unclean shutdown: $(hostname)" jan@jankratochvil.net