atomicfile

func WriteFile ¶

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

WriteFile writes data to path atomically (best-effort cross-platform).

It writes to a temporary file in the same directory and renames it into place. This avoids torn writes if the process crashes mid-write.

perm is used for the temp file. If perm is 0, WriteFile will try to preserve the existing file's mode (if it exists) and otherwise falls back to 0644.