userhelper(8) on Linux
The text 9ba3b144ed71, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
A helper interface to PAM.
Flags it lists
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-c -
-f -
-h -
-o -
-p -
-s -
-t -
-w