start.sh

#!/bin/bash

# adapted from https://github.com/discourse/discourse_docker/blob/master/image/base/boot
# this script becomes PID 1 inside the container, catches termination signals, and stops
# processes managed by runit

if [ -z "$(ls -A /opt/nagios/etc)" ]; then
    echo "Started with empty ETC, copying example data in-place"
    cp -Rp /orig/etc/* /opt/nagios/etc/
fi

if [ -z "$(ls -A /opt/nagios/var)" ]; then
    echo "Started with empty VAR, copying example data in-place"
    cp -Rp /orig/var/* /opt/nagios/var/
fi

if [ ! -f ${NAGIOS_HOME}/etc/htpasswd.users ] ; then
  htpasswd -c -b -s ${NAGIOS_HOME}/etc/htpasswd.users ${NAGIOSADMIN_USER} ${NAGIOSADMIN_PASS}
  chown -R nagios.nagios ${NAGIOS_HOME}/etc/htpasswd.users
fi

# fix permissions
chown -R nagios.nagios ${NAGIOS_HOME}/etc

shutdown() {
  echo Shutting Down
  ls /etc/service | SHELL=/bin/sh parallel --no-notice sv force-stop {}
  if [ -e /proc/$RUNSVDIR ]; then
    kill -HUP $RUNSVDIR
    wait $RUNSVDIR
  fi

  # give stuff a bit of time to finish
  sleep 1

  ORPHANS=$(ps -eo pid= | tr -d ' ' | grep -Fxv 1)
  SHELL=/bin/bash parallel --no-notice 'timeout 5 /bin/bash -c "kill {} && wait {}" || kill -9 {}' ::: $ORPHANS 2> /dev/null
  exit
}

exec runsvdir -P /etc/service &
RUNSVDIR=$!
echo "Started runsvdir, PID is $RUNSVDIR"

trap shutdown SIGTERM SIGHUP SIGINT
wait $RUNSVDIR

shutdown