pcap_dump_flush(3) on FreeBSD
The text f0983e5b8165, as FreeBSD 15.0-RELEASE, FreeBSD 14.4-RELEASE, FreeBSD 14.3-RELEASE, FreeBSD 14.2-RELEASE, FreeBSD 14.1-RELEASE, FreeBSD 14.0-RELEASE, FreeBSD 13.5-RELEASE shipped it.
flush to a savefile packets dumped