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Contains the ID of the parent process of the current process.
$ZPARENT contains the ID of the parent process that created the current process with the JOB command. If the current process was not created with the JOB command, $ZPARENT contains 0 (zero).
This special variable cannot be modified using the SET command. Attempting to do so results in a <SYNTAX> error.
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Content Date/Time: 2019-06-18 10:52:35