Linux service control script

gwan

#!/usr/bin/env bash
# Start/stop/restart TrustLeap G-WAN Application Server.
# @date 2012-12-24
# @author Ferhat
# @version 0.98
##########################################################

# This is the directory you installed gwan into
DIR="/opt/gwan"

# Default program name
PROC="gwan"

# Set how many CPUs you want to saturate (1 - n)
CORES=""

# Set to different User/Group to restrict privileges
user=""
group=""

##########################################################

set -e

# Set new privileges when USER & GROUP is set
if [[ -n "$user" && -n "$group" ]]; then
  OWNER=":$group:$user"
fi

# Set gwan workers, when CORES is set
if [[ -n "$CORES" ]]; then
  WORKER="-w $CORES"
fi

# Exit if gwan is not installed/executable:
if [[ ! -e "${DIR}/${PROC}" ]]; then
  echo -e "Error: $1 Couldn't find ${PROC} in ${DIR}"
  exit 1
fi

# Start gwan in daemon mode:
gwan_start() {
  echo -n "starting G-WAN... "
  $DIR/$PROC -d$OWNER $WORKER
  echo -e "OK"
}

# Start gwan in development mode:
gwan_test() {
 echo -n "starting G-WAN... "
 $DIR/$PROC $WORKER
}

# Gracefully kill all gwan processes:
gwan_stop() {
  $DIR/$PROC -k
}

# Forcibly kill all gwan processes:
gwan_force_stop() {
  killall -s TERM -g $PROC 2> /dev/null && echo "OK. Sent SIGTERM to $PROC" || echo "Process is not running."
}

# Restart gwan:
gwan_restart() {
  gwan_stop && sleep 10 && gwan_start
}

# Forcibly restart all gwan processes:
gwan_force_restart() {
  gwan_force_stop && sleep 10 && gwan_start
}

# Check if gwan is running
gwan_status() {
  PID=$(killall -0 $PROC 2> /dev/null)
  if [[ "$?" -eq 0 ]]; then
    echo "G-WAN is running."
    exit 0
  else
    echo "G-WAN is stopped."
    exit 1
  fi
}

# Run general-purpose code:
gwan_run() {
  echo -e "Running C script: $@\n"
  $DIR/$PROC -r $@
}

case "$1" in
'start')
  gwan_start
  ;;
'stop')
  gwan_stop
  ;;
'restart')
  gwan_restart
  ;;
'status')
  gwan_status
  ;;
'run')
  gwan_run "${@:2}"
  ;;
'test')
  gwan_test
  ;;
'force-stop')
  gwan_force_stop
  ;;  
'force-restart')
  gwan_force_restart
  ;;
*)
  echo "usage $0 start|stop|restart|status|run|test|force-stop|force-restart"
esac

• Fixed gwan_run() omitting additional parameters

  Example: /etc/init.d/gwan run /opt/gwan/tasks/argv.c