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danielsdeleo authored
There is not a good way to reliably detect whether all grandchildren have exited after sending a TERM to the process group; if the child has correctly exited, grandchildren (which may be unresponsive) will have been adopted by init (ppid == 1) so the parent cannot wait() on them. To ensure no stuck grandchildren are left, send a KILL to the process group after allowing the processes time to clean up.
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