user's terminal's last on modification time

secretcode

Hello,

I would like to know if somebody can help me with a small program.
I'm writing a program that displays logged on users. Instead of displaying the entry time, I want to display the last modification time of the user's terminal. For example, when i type something on the keyboard and it is displayed on the terminal, the terminals modification time is immediately updated. I want to diplay that time.
how do i do it? which libraries i use.

Thanks you. please reply soon