pcap_can_set_rfmon(3pcap) on Linux
The text 7d1e74b8c1d2, as Arch Linux 2026-11-01, Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye) shipped it. The page shows this text now.
check whether monitor mode can be set for a not-yet-activated capture handle