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pledge() and unveil() are gradually being adopted by operating systems other than OpenBSD:
miniblog.
Related Posts
I've learnt a surprising amount by looking at how other people are packaging my difftastic project!
(1) A local copy of the manual doesn't have the version (OpenBSD packaging fixes this).
(2) One of my dependencies has been yanked (Void Linux packaging fixes this).
Reading the beta 4 release notes for Haiku R1, it's striking how much work it is to support modern WiFi protocols: https://www.haiku-os.org/get-haiku/r1beta4/release-notes/
Previously, 802.11ac was only supported on Linux and OpenBSD! (Ignoring proprietary operating systems)
OpenBSD's pledge is intentionally designed to be simple and easy to add to projects. It's still more granular than I expected: there are several different network permissions, and even a separate permission for tape drives!