Comment by jeroenhd

The lack of a C API should not stop any C developers from using it, hopefully. The wrapper libraries are relatively simple (i.e. https://codeberg.org/git-bruh/landbox) and both Rust and Go can expose a C FFI in case developers would rather link against a more "official" library instead.

The Linux kernel has a relatively simple example on how to use the syscall even if you can't find a library to deal with it for you: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin...

There is no "liblandlock" or whatever, though there totally could be. The only reason Rust, Go, and Haskell have an easy-to-use API for this syscall is because someone bothered to implement a wrapper and publish it to the usual package managers. Whatever procedure distros use to add new libraries could just as easily be used to push a landlock library/header to use it in C.