Regarding the first point (socket as file), Plan 9 operating system is not using any system call for socket but use a pseudo file-system /net. http://doc.cat-v

Regarding the first point (socket as file), Plan 9 operating system is not using any system call for socket but use a pseudo file-system /net. http://doc.cat-v.org/plan_9/4th_edition/papers/net/ http://doc.cat-v.org/plan_9/4th_edition/papers/net/ Using the same approach in a fuse implementation would make sense.