title: kill signal from a underpriviledged user to root user
body: <p>I have been bangin my head on this problem.</p>
  
  <p>I want to send a kill(pid,SIGUSR1) signal to a process running in root user with a process
  running in tom user.However everytime,I do this Operation not permitted comes up.</p>
  
  <p>I searched up the net for any programmatical solution but to no avail.All responses are its impossible.But i am a bit skeptical and think it can be done programatically using c.</p>
  
  <p>I need a sample program or lines which can explain how this can be acheived.</p>
  
  <p>i tried using execl also.</p>
  
  <p>To be more specific this kill signal is generated from mysql user to a process running in root and tried running in mysql aswell returned the same result operation not permitted.</p>
  
  <p>Tom</p>