This is telling you. Read the entry for kill in perlfunc. The return value is the number of processes that would have received the signal. Since you are only test-killing one, the answer would only ever be 0 or 1. Getting back 1 means that the process ID in $pid is still alive (albeit perhaps frozen), and hasn't changed its UID (so you can still send it signals).

--rjray

In reply to Re: kill 0 always true by rjray
in thread kill 0 always true by Xxaxx

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