New "spawn" function in Fexl makes it easy to interact with a child process.

Here's the direct link to spawn:<p><a href="https://github.com/chkoreff/Fexl/blob/b1e149d1a0795aa191b8872b4aa86ba01aa45ef7/share/fexl/ipc.fxl" rel="nofollow">https://github.com/chkoreff/Fexl/blob/b1e149d1a0795aa191b887...</a>

And here's a Rosetta Code entry explaining everything: <a href="http://rosettacode.org/wiki/Fork#Fexl" rel="nofollow">http://rosettacode.org/wiki/Fork#Fexl</a>