/usr/lib/s9fes/help/sys_access 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 9 10 11 | S9 EXT (sys:access string integer) ==> boolean
Test whether the file named in STRING can be accessed in the
way encoded in INTEGER. INTEGER may have one of these values:
sys:access-f-ok test if the file exists
sys:access-r-ok test if the file can be read
sys:access-w-ok test if the file can be written
sys:access-x-ok test if the file can be executed
(sys:access "." sys:access-f-ok) ==> true
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