posixshmcontrol(1) on FreeBSD
The text ed5cad1cc693, as FreeBSD 14.2-RELEASE, FreeBSD 14.1-RELEASE, FreeBSD 14.0-RELEASE, FreeBSD 13.5-RELEASE, FreeBSD 13.4-RELEASE, FreeBSD 13.3-RELEASE shipped it.
Control POSIX shared memory segments
Flags it lists
-
-h -
-n