start_trema_satellite

#!/bin/bash

usage() {
  cat << EOF
usage: trema_satellite [options] <trema_app>

This script runs trema with trema-satellite. The <app> of last argument specifies an application file path of Trema. This is same of the first argument of "trema run" command.

OPTIONS:
   -h      Show this message
   -f      Specifies Trema-Satellite configuration
   -c      Specifies emulated network configuration (Trema Option)
   -s      Enables Trema wireshark plugin (Trema Option)
   -d      Runs as a daemon (Trema Option)
EOF
}

parse_options() {
  while getopts hf:c:sd OPTION
  do
    case $OPTION in
      h)
        usage
        exit 1
        ;;
      f)
        TSAT_CONFIG=${OPTARG}
        ;;
      c)
        TREMA_CONFIG="-c ${OPTARG}"
        ;;
      s)
        TREMA_FLAG_SHARK="-s"
        ;;
      d)
        TREMA_FLAG_DAEMON="-d"
        ;;
      ?)
        usage
        exit
        ;;
    esac
  done
}

check_file_existence() {
  if [ ! -e $1 ]
  then
    echo "(error) trema-satellite: $1: file not found"
    echo "Please check command-line optios with -h parameter."

    exit 1
  fi
}

check_command_existence() {
  if [ ! -n $(which $1) ]
  then
    echo "(error) trema-satellite: $1: command not found"
    echo "Please check command-line optios with -h parameter."

    exit 1
  fi
}

init_default_params() {
  TSAT_CONFIG="$(dirname ${0})/conf/default.conf"
}

init_tsat() {
  tmpdir="${TOPDIR}/tmp"

  db_path="${tmpdir}/.stored_data.db"

  if [ ! -d ${tmpdir} ]
  then
    mkdir ${tmpdir}
  fi

  init_default_params
}

start_web_server() {
  ruby graph/command/web-runner.rb ${TSAT_CONFIG} &

  WEB_SERVER_PID=$!
}

stop_web_server() {
  ps ${WEB_SERVER_PID} &> /dev/null
  if [ $? == 0 ]
  then
    kill ${WEB_SERVER_PID}
  fi
}

trema_run() {
  trema run ${APP_FILEPATH} ${TREMA_CONFIG} ${TREMA_FLAG_SHARK} ${TREMA_FLAG_DAEMON}
}

### main processing ###

ARGS=("$@")

if [ $# -lt 1 ]
then
  usage
  exit 1
fi

TOPDIR=`dirname $0`
APP_FILEPATH=${ARGS[((${#ARGS[@]}-1))]}

init_tsat

parse_options $*

check_command_existence "trema"
check_file_existence ${TSAT_CONFIG}
check_file_existence ${APP_FILEPATH}

start_web_server

trema_run

stop_web_server