fflush(stdout) in c

Question

Right when I am at fflush(stdout) and I break there in GDB, can I know what is there in stdout before I actually print it?

How can I know what is there in stdout at

Answer 1

use "setbuf()", and keep a handle to the buffer, which you can peek at. Unfortunately, I don't know off the top how to find the offset and length of unflushed data.