#!/bin/bash
awk=/usr/bin/awk
kill_all_before(){
  echo "Checking for already running script.sh besides me pid=$$"
  pid=$(ps ax -o user,pid,ppid,command | grep -v 'grep' | grep -v 'vi' | grep script.sh | grep user | $awk '{print $2}')
 if [ -n "$pid" ]
  then
    for curr_pid in ${pid[@]}
    do
       echo "Found $curr_pid already running, are you sure of what you are doing ?"
       if [ $curr_pid != $$ ]
       then
           echo "Initializing killing sequence for $curr_pid"
           echo "kill -9 $curr_pid"
                test=$(ps ax -o pid,ppid | grep -v "PID" | $awk '{ print $1 $2 }')
                echo "$test"
          # for child in $(ps ax -o pid,ppid | $awk '{ if ( $1 eq $pid ) { print $2 }}')
          # do
          #    echo "Killing child process $child because ppid = $curr_pid"
          #    echo "kill -9 $child"
          # done
      fi
    done
  else
    echo "returning"
   # return
  fi
}
kill_all_before