/usr/lib/s9fes/help/set-input-portb is in scheme9 2010.11.13-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | S9fES (set-input-port! input-port) ==> unspecific
(set-output-port! output-port) ==> unspecific
Change the default input and output ports by mutating the values
returned by CURRENT-INPUT-PORT and CURRENT-OUTPUT-PORT respectively.
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