xtrlock(1) on Linux
The text a6ab6df9b43a, as Debian 13 (Trixie) shipped it.
Lock X display until password supplied, leaving windows visible
Flags it lists
-
-b -
-f
The text a6ab6df9b43a, as Debian 13 (Trixie) shipped it.
Lock X display until password supplied, leaving windows visible
-b
-f