#! /bin/sh
#
# init script for the dynamic DNS service update utility: ddclient

### BEGIN INIT INFO
# Provides:          ddclient
# Required-Start:    $local_fs $remote_fs $network $syslog
# Required-Stop:     $local_fs $remote_fs $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Update dynamic domain name service entries
### END INIT INFO

# Author: Torsten Landschoff <torsten@debian.org>

PATH=/sbin:/bin:/usr/sbin:/usr/bin
NAME="ddclient"
DAEMON=/usr/sbin/$NAME
PERL=/usr/bin/perl
DESC="Dynamic DNS service update utility"

# Don't run if not installed
test -f "$DAEMON" || exit 0

# Evaluate the config for the Debian scripts
daemon_interval=300

if [ -r /etc/default/ddclient ]; then
  . /etc/default/ddclient
fi

PIDFILE=/var/run/$NAME.pid
OPTIONS="-daemon $daemon_interval -syslog -pid $PIDFILE"

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh

# Define LSB log_* functions.
. /lib/lsb/init-functions

#
# Function that starts the daemon/service
#
do_start() {
  # Return
  #   0 if daemon has been started
  #   1 if daemon was already running
  #   2 if daemon could not be started
  start-stop-daemon --test --start --quiet \
    --pidfile "$PIDFILE" --exec "$PERL" --startas "$DAEMON" \
    >/dev/null \
    || return 1

  start-stop-daemon --start \
    --pidfile "$PIDFILE" --exec "$PERL" --startas "$DAEMON" \
    -- "$OPTIONS" \
    || return 2
}

#
# Function that stops the daemon/service
#
do_stop() {
  # Return
  #   0 if daemon has been stopped
  #   1 if daemon was already stopped
  #   2 if daemon could not be stopped
  #   other if a failure occurred
  start-stop-daemon --stop --retry=TERM/30/KILL/5 \
    --pidfile "$PIDFILE" --exec "$PERL"
  return "$?"
}


case "$1" in
  start)
    [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
    do_start
    case "$?" in
      0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
      2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
    esac
    ;;
  stop)
    [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
    do_stop
    case "$?" in
      0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
      2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
    esac
    ;;
  status)
    echo -n "Status of $DESC: "
    if [ ! -r "$PIDFILE" ]; then
      echo "$NAME is not running."
      exit 3
    fi
    if read pid < "$PIDFILE" && ps -p "$pid" > /dev/null 2>&1; then
      echo "$NAME is running."
      exit 0
    else
      echo "$NAME is not running but $PIDFILE exists."
      exit 1
    fi
    ;;
  restart|force-reload)
    log_daemon_msg "Restarting $DESC" "$NAME"
    do_stop
    case "$?" in
      0|1)
        do_start
        case "$?" in
          0) log_end_msg 0 ;;
          1) log_end_msg 1 ;; # Old process is still running
          *) log_end_msg 1 ;; # Failed to start
        esac
        ;;
      *)
        # Failed to stop
        log_end_msg 1
        ;;
    esac
    ;;
  *)
    N=/etc/init.d/$NAME
    # echo "Usage: $N {start|stop|restart|reload|force-reload}" >&2
    log_success_msg "Usage: $N {start|stop|restart|force-reload}"
    exit 1
    ;;
esac

exit 0