mkfifo(1) on OpenBSD
The text a2b2bea4f77a, as OpenBSD 8.0-current (2026-11-01), OpenBSD 8.0, OpenBSD 7.9, OpenBSD 7.8, OpenBSD 7.7, OpenBSD 7.6, OpenBSD 7.5, OpenBSD 7.4, OpenBSD 7.3, OpenBSD 7.2 shipped it. The page shows this text now.
make FIFOs
Flags it lists
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-m