How does Mac OS log user text-input, and how to retrieve it?

[TMM]

A friend of mine discovered my Facebook password by logging in on my mac, typing a few lines of code in the terminal. Then a text file appeard containing all of my keyboard input from my last login. He won't tell me how he did it, other than it had nothing to do with a keylogger.
I'm puzzeled, but i bet you guys know more about this .

 

[ScoobyMcDoo]

Are you sure it had all keyboard input? If so, I'm calling BS - your friend installed a key logger.

If it just contained passwords, then he probably used the command line tool "security".