Tom f68115aba3 Taskbar: Wait on all waitable children in SIGCHLD handler ...

We need to call waitpid until no more waitable children are available.
This is necessary because SIGCHLD signals may coalesce into one when
multiple children terminate almost simultaneously.

Also, switch to EventLoop's asynchronous signal handling mechanism,
which allows more complex operations in the signal handler.

2020-12-02 12:57:25 +01:00

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