Init script (/etc/init.d/spideroak) and default (/etc/default/spideroak) for SpiderOak from https://launchpad.net/~tonio

spideroak-default.sh

# defaults file for spideroak daemon headless mode

# SpiderOak does not currently support handling the initial setup of 
# an account, or setup of a new device within an account entirely from 
# the command line. This is because the new user setup process requires 
# the user to answer a CAPTCHA and some other validation processes.
#
# Instead, we recommend connecting to the headless server using "ssh -X" 
# to forward X11 connections back to your local desktop machine with X11 
# running. Within your ssh session to the headless server, run SpiderOak 
# for the first time. You should see the graphical user interface for 
# SpiderOak appear on your local desktop, being forwarded over the X11 
# tunnel created by ssh. 
#
# Once this is done, you can consider enable activating Spideroak
# Headless mode by changing the following settings.

# Start SpiderOak in headless mode from init.d script ?
# only allowed values are "yes", "no", "true" and "false"
SPIDEROAK_ENABLE=yes

# Which user/uid should be used to start SpiderOak ?
# Change this the username you used while performing the initial setup.
# This value defaults to "root"
SPIDEROAK_USER=root

# SpiderOak can be using lots of resources.
# In case you run Spideroak on a device such as a Media Player PC, you
# may want to reduce SpiderOak priority...
# -20 is the minimum, and 19 the maximum, default is 0
SPIDEROAK_PRIORITY=

# Tell Spideroak to read the following environment variables
# see https://spideroak.com/forum/threads/id/2174/?page=1#snap_post12867
SPIDEROAK_INTERNAL=1

# Set log level (any of "debug", "info", "warn", "error")
# see https://spideroak.com/forum/threads/id/548/?page=1#snap_post4979
SPIDEROAK_LOG_LEVEL=info

spideroak-init.sh

#! /bin/sh
#
### BEGIN INIT INFO
# Provides:
# Required-Start:
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: SpiderOak daemon
# Description:       This script runs the SpiderOak backup software
#                    in headless mode
### END INIT INFO

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/bin/SpiderOak
DAEMON_OPTS=--headless
NAME=SpiderOak
DESC="SpiderOak daemon"
PIDFILE="/var/run/SpiderOak.pid"

test -x $DAEMON || exit 0

set -e

# Include SpiderOak defaults if available
if [ -f /etc/default/spideroak ] ; then
  . /etc/default/spideroak
fi

# Set default user
if [ -z $SPIDEROAK_USER ] ; then
  SPIDEROAK_USER=root
fi

# Set priority
if [ -z $SPIDEROAK_PRIORITY ] ; then
  SPIDEROAK_PRIORITY=0
fi

# Set user home dir
HOMEDIR=$(cat /etc/passwd | grep $SPIDEROAK_USER | awk -F: '{print $6}')

do_start() {
  if [ `pidof $NAME` ] ; then
    echo "$DESC is already running"
  else
    case "$SPIDEROAK_ENABLE" in
      yes|YES|true|TRUE)
        if [ ! -f $HOMEDIR/.SpiderOak/preferences.dat ] ; then
          echo "Not starting $DESC, you need to graphically perform the initial setup."
          return 0
        fi
        echo -n "Starting $DESC: "
	export SPIDEROAK_LOG_LEVEL SPIDEROAK_INTERNAL SPIDEROAK_LOG_ROTATE_SIZE SPIDEROAK_LOG_ROTATE_COUNT
        start-stop-daemon --start --quiet --background --make-pidfile --nicelevel $SPIDEROAK_PRIORITY \
          --pidfile $PIDFILE --chuid $SPIDEROAK_USER --exec $DAEMON -- $DAEMON_OPTS
        if [ $? -eq 0 ] ; then
          echo "Ok"
          return 0
        else
          echo "Error"
          return 1
        fi
        ;;
      *)
        echo "Not starting $DESC, check /etc/default/spideroak to enable it."
        ;;
    esac
  fi
}

do_stop() {
  if [ ! `pidof $NAME` ] ; then
    echo "$DESC is already stopped"
  else
    echo -n "Stopping $DESC: "
    start-stop-daemon --stop --quiet --signal 9 \
      --pidfile $PIDFILE
    if [ $? -eq 0 ] ; then
      echo "Ok"
      return 0
    else
      echo "Error"
      return 1
    fi
  fi
}

do_log() {
  LOGTYPE=$1
  LOGFILE=$(ls -r $HOMEDIR/.SpiderOak | grep -e "^${LOGTYPE}_[0-9]*\.log" | head -n1)
  tail -f $HOMEDIR/.SpiderOak/$LOGFILE
}

case "$1" in
  start)
        do_start
        ;;
  stop)
        do_stop
        ;;
  restart|force-reload)
        do_stop
        if [ $? -eq 0 ] ; then
          sleep 1
          do_start
        fi
        ;;
  status)
        if [ -f "$PIDFILE" ]; then
          pid=$(cat $PIDFILE)
        else
          pid="x"
        fi
        if [ `pidof SpiderOak | grep "$pid" | wc -l` -ne 0 ] ; then
          echo "SpiderOak is currently running."
        else
          echo "SpiderOak is stopped."
        fi
        ;;
  log|log-oak)
        do_log oak
       ;;
  log-spider)
        do_log spider
       ;;
  *)
        N=/etc/init.d/$NAME
        echo "Usage: $N {start|stop|restart|force-reload|status|log|log|oak|log-spider}" >&2
        exit 1
        ;;
esac

exit 0

I think that the default config dir and prefs file have changed.
It's now better to check for
$HOMEDIR/.config/SpiderOak/prefs.dat