/usr/lib/s9fes/help/sys_get-magic-value 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 6 7 8 | S9 EXT (sys:get-magic-value string) ==> integer
Retrieve a magic constant from the system. When the requested
constant could not be delivered, signal an error and terminate
the calling program.
(sys:get-magic-value "O_RDONLY") ==> 0
(sys:get-magic-value "SIGTERM") ==> 15
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