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TL;DR, I need a way to kill a process and all descendant processes, without killing siblings with the same group id, without output printed in the terminal, and with a non-zero exit code.

I have a bash script which is spawning child processes, which spawn grandchild and great grandchild processes.

I want to kill a particular child, and all it's descendants, without using sudo.

Here are some solutions I've tried that don't work for me:

  1. Killing via group id. The child may have sibling processes with the same group id I do not want to kill.

  2. Using kill $childpid. This is not killing all grandchildren and great grandchildren processes

  3. Using kill -9 $childpid. This leads to text output in terminal that I ran the script from, which is not ideal, even if the script and the kill command both have their stdout and stderr routed to a different file

  4. Using pkill -P $childpid. This seems to do what I want at first, but the child process exits with exit code zero. The parent process needs to know its child was killed prematurely, so I need it to exit with a code other than 0

What is the best way to do this?

Edit: my post has been flagged as a possible duplicate, but all solutions in those links have one of the issues I describe in my post

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