atomicfile

Documentation

Overview

Package atomicfile writes a file atomically: data is written to a temp file in the same directory, fsync'd, then renamed over the destination. A crash or full disk mid-write therefore leaves the previous file intact rather than a truncated one (production audit M3). Stdlib only.

Index

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

Functions

func Write

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

Write atomically writes data to path with the given permissions. The temp file is created in path's directory (so the final rename is on the same filesystem and is atomic), fsync'd, then renamed over path. On any failure the temp file is removed and path is left untouched.