[(1) on FreeBSD
The text 3c31d212381d, as FreeBSD 3.0-RELEASE shipped it.
condition evaluation utility
Flags it lists
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-S -
-b -
-c -
-d -
-e -
-f -
-g -
-h -
-n -
-p -
-r -
-s -
-t -
-u -
-w -
-x -
-z