pragmatism first

atOpenExpand, atReadExpand, atCloseExpand

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This manual	Reference	Other manuals
atread(3)	referred by	vgrep(1)
atread(3)	refer to	atattribute(3) \| atbind(3) \| close(2) \| errno(3) \| intro(2) \| open(2) \| read(2)