#! /bin/sh

### BEGIN INIT INFO
# Provides:          rsyncd
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Should-Start:      $named
# Default-Start:     2 3 4 5
# Default-Stop:      
# Short-Description: fast remote file copy program daemon
# Description:       rsync is a program that allows files to be copied to and
#                    from remote machines in much the same way as rcp.
#                    This provides rsyncd daemon functionality.
### END INIT INFO

set -e

# /etc/init.d/rsync: start and stop the rsync daemon

DAEMON=/usr/bin/rsync
RSYNC_ENABLE=false
RSYNC_OPTS=''
RSYNC_DEFAULTS_FILE=/etc/default/rsync
RSYNC_CONFIG_FILE=/etc/rsyncd.conf
RSYNC_PID_FILE=/var/run/rsync.pid
RSYNC_NICE_PARM=''
RSYNC_IONICE_PARM=''

test -x $DAEMON || exit 0

. /lib/lsb/init-functions

if [ -s $RSYNC_DEFAULTS_FILE ]; then
    . $RSYNC_DEFAULTS_FILE
    case "x$RSYNC_ENABLE" in
	xtrue|xfalse)	;;
	xinetd)		exit 0
			;;
	*)		log_failure_msg "Value of RSYNC_ENABLE in $RSYNC_DEFAULTS_FILE must be either 'true' or 'false';"
			log_failure_msg "not starting rsync daemon."
			exit 1
			;;
    esac
    case "x$RSYNC_NICE" in
	x[0-9])		RSYNC_NICE_PARM="--nicelevel $RSYNC_NICE";;
	x1[0-9])	RSYNC_NICE_PARM="--nicelevel $RSYNC_NICE";;
	x)		;;
	*)		log_warning_msg "Value of RSYNC_NICE in $RSYNC_DEFAULTS_FILE must be a value between 0 and 19 (inclusive);"
			log_warning_msg "ignoring RSYNC_NICE now."
			;;
    esac
    case "x$RSYNC_IONICE" in
	x-c[123]*)	RSYNC_IONICE_PARM="$RSYNC_IONICE";;
	x)		;;
	*)		log_warning_msg "Value of RSYNC_IONICE in $RSYNC_DEFAULTS_FILE must be -c1, -c2 or -c3;"
			log_warning_msg "ignoring RSYNC_IONICE now."
			;;
    esac
fi

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

rsync_start() {
    if [ ! -s "$RSYNC_CONFIG_FILE" ]; then
        log_failure_msg "missing or empty config file $RSYNC_CONFIG_FILE"
        log_end_msg 1
        exit 0
    fi
    # See ionice(1)
    if [ -n "$RSYNC_IONICE_PARM" ] && [ -x /usr/bin/ionice ] &&
        /usr/bin/ionice "$RSYNC_IONICE_PARM" true 2>/dev/null; then
        /usr/bin/ionice "$RSYNC_IONICE_PARM" -p$$ > /dev/null 2>&1
    fi
    if start-stop-daemon --start --quiet --background \
        --pidfile $RSYNC_PID_FILE --make-pidfile \
        $RSYNC_NICE_PARM --exec $DAEMON \
        -- --no-detach --daemon --config "$RSYNC_CONFIG_FILE" $RSYNC_OPTS
    then
        rc=0
        sleep 1
        if ! kill -0 $(cat $RSYNC_PID_FILE) >/dev/null 2>&1; then
            log_failure_msg "rsync daemon failed to start"
            rc=1
        fi
    else
        rc=1
    fi
    if [ $rc -eq 0 ]; then
        log_end_msg 0
    else
        log_end_msg 1
        rm -f $RSYNC_PID_FILE
    fi
} # rsync_start


case "$1" in
  start)
	if "$RSYNC_ENABLE"; then
	    log_daemon_msg "Starting rsync daemon" "rsync"
	    if [ -s $RSYNC_PID_FILE ] && kill -0 $(cat $RSYNC_PID_FILE) >/dev/null 2>&1; then
		log_progress_msg "apparently already running"
		log_end_msg 0
		exit 0
	    fi
            rsync_start
        else
            if [ -s "$RSYNC_CONFIG_FILE" ]; then
                [ "$VERBOSE" != no ] && log_warning_msg "rsync daemon not enabled in $RSYNC_DEFAULTS_FILE, not starting..."
            fi
	fi
	;;
  stop)
	log_daemon_msg "Stopping rsync daemon" "rsync"
	start-stop-daemon --stop --quiet --oknodo --pidfile $RSYNC_PID_FILE
	log_end_msg $?
	rm -f $RSYNC_PID_FILE
	;;

  reload|force-reload)
	log_warning_msg "Reloading rsync daemon: not needed, as the daemon"
	log_warning_msg "re-reads the config file whenever a client connects."
	;;

  restart)
	set +e
	if $RSYNC_ENABLE; then
	    log_daemon_msg "Restarting rsync daemon" "rsync"
	    if [ -s $RSYNC_PID_FILE ] && kill -0 $(cat $RSYNC_PID_FILE) >/dev/null 2>&1; then
		start-stop-daemon --stop --quiet --oknodo --pidfile $RSYNC_PID_FILE || true
		sleep 1
	    else
		log_warning_msg "rsync daemon not running, attempting to start."
	    	rm -f $RSYNC_PID_FILE
	    fi
            rsync_start
        else
            if [ -s "$RSYNC_CONFIG_FILE" ]; then
                [ "$VERBOSE" != no ] && log_warning_msg "rsync daemon not enabled in $RSYNC_DEFAULTS_FILE, not starting..."
            fi
	fi
	;;

  status)
	status_of_proc -p $RSYNC_PID_FILE "$DAEMON" rsync
	exit $?	# notreached due to set -e
	;;
  *)
	echo "Usage: /etc/init.d/rsync {start|stop|reload|force-reload|restart|status}"
	exit 1
esac

exit 0