The child needs to print the data out to standard input (which the parent must have ready to capture) or to a temporary file (whose name the parent might have passed as an argument).

The simple case where the parent waits for the child to complete can be written as:

parent
------
$result = `child.pl`;

child
-----
print($result);

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In reply to Re: passing a parameter to an outside program by ikegami
in thread passing a parameter to an outside program by asr055

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