(&key (:in-buffer #:in-buffer) (:cin-buffer #:cin-buffer) (:in-index #:in-index) (:in #:in)
(:bin #:bin) (:n-bin #:n-bin) (:out #:out) (:bout #:bout) (:sout #:sout) (:misc #:misc)
(:input-char-pos #:input-char-pos) (:name #:name) (:file #:file) (:original #:original)
(:delete-original #:delete-original) (:element-size #:element-size)
(:element-type #:element-type) (:element-mode #:element-mode) (:fd #:fd)
(:fd-type #:fd-type) (:buffering #:buffering) (:dual-channel-p #:dual-channel-p)
(:output-column #:output-column) (:listen #:listen) (:serve-events #:serve-events)
(:instead #:instead) (:ibuf #:ibuf) (:eof-forced-p #:eof-forced-p) (:obuf #:obuf) ..)