lockf(1) on FreeBSD
The text a52f599d9a8a, as FreeBSD 14.5-RELEASE, FreeBSD 14.4-RELEASE, FreeBSD 14.3-RELEASE, FreeBSD 14.2-RELEASE, FreeBSD 14.1-RELEASE, FreeBSD 13.5-RELEASE, FreeBSD 13.4-RELEASE, FreeBSD 13.3-RELEASE shipped it.
execute a command while holding a file lock
Flags it lists
-
-k -
-n -
-s -
-t -
-w