userhelper(8) on Linux
The text 218b9f0b9a02, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye) shipped it. The page shows this text now.
A helper interface to PAM.
Flags it lists
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-c -
-f -
-h -
-o -
-p -
-s -
-t -
-w