Fix #1136: check PID in AIX in procfs #1137
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The 'kill' method to check whether processes exist doesn't work on 'wait' processes in AIX. All processes (and only processes) have a "psinfo" file in procfs so we can check whether PIDs exist there.
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The 'kill' method to check whether processes exist doesn't work on 'wait' processes in AIX. All processes (and only processes) have a "psinfo" file in procfs so we can check whether PIDs exist there.