proxy

#!/bin/bash

pid_file="/tmp/.vpn.pid"
port=3128
host="localhost"
user="root"

function usage() {
  echo "$0 [start|stop|status]"
  exit 0
}

function clean() {
  rm -f $pid_file && echo "Removed PID" || echo "No pid found"
}

function start() {
  if [[ -f $pid_file ]]
    then
      echo "Looks like pid file exists please remove it first: $pid_file"
      exit 1
  else
    echo "Starting proxy..."
    nohup ssh -T -N -D$port $user@$host >/dev/null 2>&1 &
    pid=`ps -ef | grep ssh | grep $host | grep -v grep | awk '{print $2}'`
    if [ $? == 0 ]
       then
         echo "Success pid: $pid, port: $port"
         echo $pid > $pid_file
         exit 0
    else
         echo "Failed"
         exit 1
    fi
  fi
}

function stop() {
  if [[ -f $pid_file ]]
    then
      echo "Stopping VPN"
      pid=`awk '{print $1}' $pid_file`
      echo "PID: $pid, stopping vpn"
      kill -9 $pid >/dev/null 2>&1 && rm -f $pid_file && echo "VPN Stopped"
      exit 0
  else
    echo "No pid file found"
    exit 1
  fi
}

function status() {
  if [[ -f $pid_file ]]
    then
      pid=`awk '{print $1}' $pid_file`
      echo "PID: $pid"
      ps -ef | grep $pid | grep -v grep >/dev/null 2>&1 || clean
      exit 0
  else
    echo "No pid file found"
    exit 1
  fi

}

case $1 in
  start)  start ;;
  stop)   stop  ;;
  status) status ;;
  clean)  clean ;;
  *)      usage ;;
esac