flock(1) on Linux
The text feb1181b23e9, as Debian 8 (Jessie) shipped it.
manage locks from shell scripts
Flags it lists
-
--close -
--command -
--conflict-exit-code -
--exclusive -
--help -
--nb -
--nonblock -
--shared -
--timeout -
--unlock -
--version -
--wait -
-E -
-V -
-c -
-e -
-h -
-n -
-o -
-s -
-u -
-w -
-x