lockfile-create(1) on Linux
The text 7ed155d49a0b, as Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
command-line programs to safely lock and unlock files and mailboxes (via liblockfile).
Flags it lists
-
--lock-name -
--oneshot -
--quiet -
--retry -
--use-pid -
--verbose -
-l -
-o -
-p -
-q -
-r -
-v