You're replying to a comment by Cheetah.

June 12, 2013, 01:14

You can't wait for a PID that isn't a child process, so the PID reuse isn't a problem. There's a lot of other good info on managing and waiting for (multiple) sub-processes here: http://stackoverflow.com/questions/356100/how-to-wait-in-bash-for-several-subprocesses-to-finish-and-return-exit-code-0

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