/usr/lib/help/sys_readdir is in scheme9 2013.11.26-1.
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 | S9 EXT (sys:readdir string) ==> list
Return a list of all file names contained in the directory STRING.
SYS:READDIR never includes the special files "." and ".." in the
resulting list.
(sys:readdir "empty-directory") ==> ()
|