security_file_lock(9)

📦 version 7.3.1, in nixpkgs unstable

💖 security_file_lock(9) — the file-lock permission check that ate 💖

This one is from the Kernel API Manual, and it’s literally about checking if a file lock is allowed before the kernel lets it happen. Bestie, let’s get into it. 🦋

🌸 NAME 🌸

security_file_lock — check if a file lock is allowed. That’s the whole name, no cap.

✨ SYNOPSIS ✨

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

🎀 ARGUMENTS 🎀

  • file — file. Like, the actual file, bestie.
  • cmd — lock operation (e.g. F_RDLCK, F_WRLCK).

🦋 DESCRIPTION 🦋

Okay so this hook checks permission before performing file locking operations. Important note: the hook mediates both flock and fcntl style locks — both vibes, one hook. 💅

👑 RETURN 👑

Returns 0 if permission is granted — yes, zero is the good-vibes answer here. 💖

💜 SEE ALSO 💜

Kernel file: ./security/security.c — and the whole extended friend group is here, no cap:

🌈 security_file_lock(9) · source/version: ./security · date: October 2026 · that’s the tea, bestie, bye! 💅🫶
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