title: How can I find who or which process sent signals to my process on Solaris
body: <p>I have JBoss running on Sun Java 1.5.
  From time to time, it unexpectedly shuts down (in orderly fashion).
  I suspect some other process is sending it kill or CTRL+C signals.</p>
  
  <p>Is there a way on Unix/Solaris to trace who sent the signal?</p>