smack_file_lock(9)

📦 version 7.3.1, in nixpkgs unstable

💅 smack_file_lock(9) — Kernel API Manual 💅

okay so bestie, we're cracking open smack_file_lock(9) from the Kernel API Manual today, and honestly? It's giving "small function, big security energy." Let's get into it. ✨

🌸 NAME 🌸

smack_file_lock — the Smack check that goes down on file locking. yeah. that's the whole vibe. 🎀

🦋 SYNOPSIS 🦋

int smack_file_lock (struct file *file , unsigned int cmd );

💜 ARGUMENTS 💜

  • file — the object. the actual thing we're looking at. main character, honestly. 👑
  • cmd — unused. not me showing up to the function and doing nothing 😭 literally zero contributions but we love her anyway.

🔥 DESCRIPTION 🔥

So here's the tea: this returns 0 if the current task has lock access — slay, we're in, periodt 💅 — and an error code otherwise. That's it. That's the whole function. Short, sweet, iconic. 🫶

🌈 SEE ALSO 🌈

Kernel file ./security/smack/smack_lsm.c — and ngl, the whole Smack cinematic universe is linked in here, so buckle up bestie, this is a LONG list but we do not gatekeep: 🧚

fr fr that's a whole friend group and we are NOT leaving anyone out of the group chat. 🫶

🎀 and that's the page! brought to you by ./security/smack (that's the source / version bestie) and dated October 2026 — mwah, ily, go read the source code 💋✨

📦 where this page comes from