Upstart integration

Example Upstart job configuration file:

# This file contains a job file for Upstart, enabling the Napatech 3GD Service
# (ntservice) to be controlled by Upstart. This includes starting the
# ntservice at boot time.
#
# Upstart is an event-based replacement for the /sbin/init daemon which
# handles starting of tasks and services during boot, stopping them during
# shutdown and supervising them while the system is running.
#
# It is recommended to ensure 'LogToSystem = true' is set in the ntservice.ini
# file to enable logging with syslog.
#
# To use this job file file with Upstart, copy this file to /etc/init/ and call
# $ initctl reload-configuration
#
# By default ntservice will be started by Upstart on boot. To use manual start
# comment the "start on" option below.
#
# To start the Napatech 3GD Service call
# $ start ntservice
# This will not return until the ntservice is operational.
#
# To stop the Napatech 3GD Service call
# $ stop ntservice
#
# To restart the Napatech 3GD Service after ntservice.ini changes call
# $ restart ntservice
#

# Job file description
description "Napatech 3GD Service"

# Location where Napatech 3GD Software Suite is installed
env NAPATECH3_ROOT=/opt/napatech3

# Start ntservice multi user run levels. Comment this line to use manual start
start on runlevel [2345]

# Stop ntservice on all other run levels
stop on runlevel [016]

# Upstart will expect ntservice to call fork exactly once
expect fork

# Uncomment the following lines to respawn the ntservice up to 10 times within
# a 5 second period. If the job exceeds these values, it will be stopped and
# marked as failed.
# respawn
# respawn limit 10 5

# The number of seconds Upstart will wait before killing a process
kill timeout 120

# Make sure the low level driver is loaded before starting ntservice
pre-start script
  if [ "`lsmod | grep -c nt3gd`" = "0" ]; then
    $NAPATECH3_ROOT/bin/ntunload.sh silent
    $NAPATECH3_ROOT/bin/ntload.sh
    # On error, tell Upstart not to start the main process for the job
    if [ $? -ne 0 ]; then
      exit 1
    fi
  fi
end script

# Do not return until ntservice is operational
post-start script
  while [ "`pgrep -x ntservice | grep -c ^`" = "2" ]; do sleep 1; done
end script

# Call ntservice directly as Upstart is not clever to keep track of the
# ntservice process ID if ntstart.sh is used.
#
# By default the file $NAPATECH3_ROOT/config/ntservice.ini is used as
# configuration file for the ntservice.
exec $NAPATECH3_ROOT/bin/ntservice -d -f $NAPATECH3_ROOT/config/ntservice.ini

# Optionally unload the low-level driver on stop
#post-stop script
#  $NAPATECH3_ROOT/bin/ntunload.sh silent
#end script