I don't have time to run your code, but there is at least one thing you do wrong:

Your parent-process uses the angle-operator to read from the pipe which means it looks for newlines. Your child however does not supply newlines.

So try 

print WRITE "$val2\n";

[download]
in your child.

In reply to Re: interprocess communication by morgon
in thread interprocess communication by mevans

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