security_node_sid(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 security_node_sid(9) — like, the whole manual page, bestie 🌸

Okay so this is security_node_sid(9) from the Kernel API Manual, and it's genuinely one of the shorter ones — a little baby page, but it still ate. Let's get into it 🫶

✨ NAME ✨

security_node_sid — the function that gets you the SID for a node (host). That's it. That's the whole vibe. 💅

🎀 SYNOPSIS 🎀

int security_node_sid (u16 domain , const void *addrp , u32 addrlen ,
       u32 *out_sid );

Look at her. Four params, returns an int, absolutely iconic behaviour. ✨

🦋 ARGUMENTS 🦋

  • domain — the communication domain, a.k.a. the address family. Basically "what kind of address are we even talking about here" 🌈
  • addrp — the address itself. Just a const void *, so she's flexible, she contains multitudes 💜
  • addrlen — how long that address is, in bytes. Don't lie about this one, fr fr 📏
  • out_sid — the security identifier that comes back out. This is where the good stuff lands 🎀
ngl the whole thing is four lines of docs and I respect the restraint. lowkey legendary.

👑 SEE ALSO 👑

The kernel file in question is ./security/selinux/ss/services.c — that's the main character energy right there, no cap. And here's the whole group chat of related pages, every single one, because we do not skip anyone in this house 💖

That's the entire ./security/selinux/ss crew and they all said hi 🦋

Signed, sealed, delivered — this page lives in ./security/selinux/ss, dated October 2026, and answers to the name security_node_sid(9). mwah 💋✨

📦 where this page comes from