Contains the ID of the
parent process of the current process.
$ZPARENT contains the ID ofthe parent process that created the current process with the JOB command.If the current process was not created with the JOB command, $ZPARENT contains0 (zero).
This special variable cannot be modified using the SET command.Attempting to do so results in a <SYNTAX> error.
Content Date/Time: 2019-08-16 05:50:13