atomicfile

Documentation

Overview

Package atomicfile provides atomic file write operations.

All writes follow the same contract: write to a temporary file in the same directory as the target, fsync, then rename. This guarantees that readers never see a partially-written file — they see the old content or the new content, never a torn intermediate state.

Index

• func WriteFile(path string, data []byte, perm os.FileMode) error

Functions

func WriteFile

func WriteFile(path string, data []byte, perm os.FileMode) error

WriteFile writes data atomically: tmp → fsync → rename. The temporary file is created in the same directory as path to ensure the rename is same-filesystem (required for atomic rename on POSIX).