sync(8) on OpenBSD
The text e33547f6554d, as OpenBSD 3.3, OpenBSD 3.2, OpenBSD 3.1, OpenBSD 3.0, OpenBSD 2.9, OpenBSD 2.8, OpenBSD 2.7, OpenBSD 2.6 shipped it.
force completion of pending disk writes (flush cache)
The text e33547f6554d, as OpenBSD 3.3, OpenBSD 3.2, OpenBSD 3.1, OpenBSD 3.0, OpenBSD 2.9, OpenBSD 2.8, OpenBSD 2.7, OpenBSD 2.6 shipped it.
force completion of pending disk writes (flush cache)