I would like to be able to redirect STDIN of the exec'ed process to the console, once the child process has finished writing the data to it.
I'm sorry I have to say this. what you said is not what you want. what it sounds like to me is:
you want to run a script that takes STDIN and sends it both to the child process and to the console.
what it sounded like you said was:
you want to pull the date the the exec'ed program just took in out of it and send it to the console and back to the program that was called.