Remote sharing of a terminal
Solution 1:
screen does exactly that. But you have to start the process in screen.
To create the session use
screen -S hugeprocess
To resume the session
If the screen is still running:
screen -x hugeprocess
If the screen has been detached:
screen -r hugeprocess
To detach from the session
CTRL + A+D
Enable screen log file
You may also want to use the -L parameter when you create the session to enable logging to ~/screenlog.0 which you can read using less -r screenlog.0
Solution 2:
Try reptyr:
reptyr - Reparent a running program to a new terminal