Make isRunning use waitpid with WNOHANG option to know if the child process is running #89
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Hello, I made this change in an scenario where I saved my image with a pointer to the subprocess, and when reopened the image the subprocess was not really running but the testing method
isRunningreturned true anyway.But maybe we want to keep the behavior of
isRunningand add a newisCurrentlyRunningor something like that.The method I found to check if the process was really running was to use
waitpidwithWNOHANGoption to know if the child process is running. See: https://man7.org/linux/man-pages/man3/wait.3p.html