ediff-read-event

ediff-read-event is an alias for `read-event' in `ediff-init.el'.

(ediff-read-event &optional PROMPT INHERIT-INPUT-METHOD SECONDS)

Read an event object from the input stream.
If the optional argument PROMPT is non-nil, display that as a prompt.
If the optional argument INHERIT-INPUT-METHOD is non-nil and some
input method is turned on in the current buffer, that input method
is used for reading a character.
If the optional argument SECONDS is non-nil, it should be a number
specifying the maximum number of seconds to wait for input. If no
input arrives in that time, return nil. SECONDS may be a
floating-point value.