Missing struct msghdr about linux-raw-sys

[bjorn3]

I think it is defined by libc and not by the linux headers. I can find a definition in /usr/include/x86_64-linux-gnu/bits/socket.h which is glibc specific. I can also find a different (though equivalent when zero-initializing the padding fields) definition in /usr/include/x86_64-linux-musl/sys/socket.h which is musl specific. I can also find the definition used by the kernel on the man page which directly matches glibc it seems: https://man7.org/linux/man-pages/man2/sendmsg.2.html

[sunfishcode]

Thanks for working on this!

Yes, that's the best approach when possible. Unfortunately, Linux's headers don't define all the types that participate in Linux's ABI, so this crate also contains a header, gen/modules/general.h, which includes Linux headers for everything it can, and manually defines things that are missing.

At a brief glance, it looks like Linux's own msghdr in <linux/socket.h> is only defined in __KERNEL__ configurations, so the first step is to add a definition of msghdr to gen/modules/general.h here. The next step is to regenerate the generated bindings, with the command in the toplevel README.md. Then commit the result and submit a PR :-).