fork, threads and proper closing

[Tomasz Pajor]

Hello,

Configuration is as follows.

I have a starter process which creates 3 sub processes (forks) and each 
of this processes creates a number of threads.
Threads in that processes have semaphore so on KeyboardInterrupt without 
sending a sigterm to the subprocess i'm not able to close threads.
Is there any work around? Can I somehow run join for the thread on 
keyboard interrupt?

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Best regards
Tomasz Pajor