in reply to IPC::Open2 or IPC::Run or a better way?

Depending on the complexity of what you want to my choices (purely based on having some experience with these modules) would be:

IPC::Open2 (simplest)

Expect (little more complex, little more control)

POE (complexer, but offers more bells and whistles) From your description I'd probably go for the simplest one.

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