#! /bin/sh -e

# Written by Tollef Fog Heen <tfheen@err.no>
# Based on code by Peter Palfrader
#
# Restart the given bacula director when it's idle.
#
# XXX: Add locking

set -e

if [ "$#" != 2 ];then
  echo >&2 "$0 <port> <service>"
  echo "Restart bacula service when port idle"
  exit 1
fi

PORT="$1"
SERVICE="$2"

# chk_net <port>
# returns true (0) if there are connections to that port.
chk_net() {
  local port="$1"; shift
  local con="$(ss -nt "sport = :$port" | wc -l)"
  if [ "$con" -gt 1 ]; then
    return 0
  else
    return 1
  fi
}

while chk_net "$PORT"; do
    sleep 5
done

service $SERVICE restart