Comment 2 for bug 1639322

This is gtk interface.

However, the function on line 40 os spapr_vty.c looks really insane.

It asserts that it is not given more data to input in a ring buffer than is size of the buffer and then stuffs all the data in regardless of the amount of data already present.

It should probably loop or one of its callers but I did not find a decent comparable piece of code to cut and paste whatever callbacks are needed for the other side to consume the bytes.