in reply to How can I read DATA in parent and child?
Verrrry interrrresting!
About 10 minutes' rummaging in the docs failed to find any explanation.
Some playing with the code says that what we have is a race. If you sleep in the parent before reading, the child gets the data.
Further playing says that if you seek before reading, both parent and child get the data. I was using the DATA handle directly, so my seek was
seek( DATA, tell( DATA ), 0 );.
Note that this actually works without the parentheses, but I included them for clarity.
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