lockf(1) on macOS
The text a52f599d9a8a, as macOS 26.5, macOS 26.4, macOS 26.3, macOS 26.2, macOS 26.1, macOS 26.0, macOS 15.6, macOS 15.5, macOS 15.4, macOS 15.3, macOS 15.2, macOS 15.1, macOS 15.0 shipped it. The page shows this text now.
execute a command while holding a file lock
Flags it lists
-
-k -
-n -
-s -
-t -
-w