> The idea behind Pledge/Unveil was first in Landlock also.

This is so plainly, and verifiably untrue, that it's almost funny. The patch series and kernel commit adding Landlock to the Linux kernel even references OpenBSD pledge(2)/unveil(2) as a source of inspiration.

https://github.com/torvalds/linux/commit/17ae69aba89dbfa2139...

https://lore.kernel.org/linux-security-module/20210422154123...