#! /bin/sh

### BEGIN INIT INFO
# Provides:		vyos-intfwatchd
# Required-Start:	vyatta-router
# Required-Stop:
# Default-Start:	2 3 4 5
# Default-Stop:
# Short-Description:	Interface status monitoring daemon
### END INIT INFO

set -e

# /etc/init.d/vyos-intfwatchd: start and stop the event watching daemon

test -x /opt/vyatta/sbin/vyos-intfwatchd || exit 0

umask 022

. /lib/lsb/init-functions

if [ -n "$2" ]; then
    EWD_OPTS="$EWD_OPTS $2"
fi

# Are we running from init?
run_by_init() {
    ([ "$previous" ] && [ "$runlevel" ]) || [ "$runlevel" = S ]
}

check_dev_null() {
    if [ ! -c /dev/null ]; then
	if [ "$1" = log_end_msg ]; then
	    log_end_msg 1 || true
	fi
	if ! run_by_init; then
	    log_action_msg "/dev/null is not a character device!"
	fi
	exit 1
    fi
}

export PATH="${PATH:+$PATH:}/usr/sbin:/sbin:/usr/bin:/opt/vyatta/sbin"

case "$1" in
  start)
	check_dev_null
	log_daemon_msg "Starting vyos-intfwatchd" "vyos-intfwatchd"
	if start-stop-daemon --start --quiet --oknodo --pidfile /var/run/vyos-intfwatchd.pid --exec /opt/vyatta/sbin/vyos-intfwatchd -- $EWD_OPTS; then
	    log_end_msg 0
	else
	    log_end_msg 1
	fi
	;;
  stop)
	log_daemon_msg "Stopping vyos-intfwatchd" "vyos-intfwatchd"
        VI_PID=`cat /var/run/vyos-intfwatchd.pid`
        for p in `pgrep -P $VI_PID`; do
            kill $p
        done
	if start-stop-daemon --stop --quiet --oknodo --pidfile /var/run/vyos-intfwatchd.pid; then
	    log_end_msg 0
	else
	    log_end_msg 1
	fi
	;;
  restart)
	log_daemon_msg "Restarting vyos-intfwatchd" "vyos-intfwatchd"
	start-stop-daemon --stop --quiet --oknodo --retry 30 --pidfile /var/run/vyos-intfwatchd.pid
	check_for_no_start log_end_msg
	check_dev_null log_end_msg
	if start-stop-daemon --start --quiet --oknodo --pidfile /var/run/vyos-intfwatchd.pid --exec /opt/vyatta/sbin/vyos-intfwatchd -- $EWD_OPTS; then
	    log_end_msg 0
	else
	    log_end_msg 1
	fi
	;;
  status)
	status_of_proc -p /var/run/vyos-intfwatchd.pid /opt/vyatta/sbin/vyos-intfwatchd vyos-intfwatchd && exit 0 || exit $?
	;;

  *)
	log_action_msg "Usage: /etc/init.d/vyos-intfwatchd {start|stop|restart|status}"
	exit 1
esac

exit 0