To identify exiftool's ppid #71
                
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Thanks for your useful tools.
I create a exiftool's pool in my program, which is very useful in high concurrency scenarios. But when my program's proccess be killed in accident,the pool will lost control.
So I want to manage them,so I want to get their pid and source program name, then when my program restart, it can check and close the previous exiftool's pool.