title: Trace of executed programs called by a Bash script
body: <p>A script is misbehaving. I need to know who calls that script, and who calls the calling script, and so on, only by modifying the misbehaving script.</p>
  
  <p>This is similar to a stack-trace, but I am <em>not</em> interested in a call stack of function calls within a single bash script.
  Instead, I need the chain of executed programs/scripts that is initiated by my script.</p>