#!/bin/sh

. /etc/utils.sh

if ! runnable radvd; then
  # Only the RG should receive a delegated prefix.  Either the RG doesn't have
  # radvd, or some other device received a DP which is not supposed to happen.
  echo "ERROR: radvd not installed."
  exit 1
fi

case "$1" in
  start)
    echo "Starting radvd"
    babysit 60 radvd -p /var/run/radvd.pid --logmethod stderr 2>&1 | logos radvd
    ;;
  stop)
    echo "Stopping radvd"
    pkillwait -x radvd
    rm -f /var/run/radvd.pid
    ;;
  restart)
    $0 stop; $0 start
    ;;
  update)
    if [ ! -e /var/run/radvd.pid ]; then
      $0 start
    else
      kill -HUP $(cat /var/run/radvd.pid)
    fi
    ;;
  *)
    echo "Usage: $0 {start|stop|restart}"
    exit 1
    ;;
esac