explain_setsockopt_or_die(3) on Linux
The text 531ed261a332, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it. The page shows this text now.
get and set options on sockets and report errors