On *nix systems, if you know the pid of the process in question, you can also send it a signal 0, and check the results. Might be helpful....

In reply to Re: RFC: A new module to help avoid running multiple instances of the same script (via cron, for example) by atcroft
in thread RFC: A new module to help avoid running multiple instances of the same script (via cron, for example) by scorpio17

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