It is the same meaning in all three places: only just (managing) Edit: I managed to read "barely was all he was know" as an error for "barely was all he knew", but actually it is an error for "barely was all he was now". In this case, the last "barely" may refer to something else about his state, but it is not possible to know what without knowing the whole story.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.