fileutil

Documentation

Index

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

Functions

func AtomicWrite

func AtomicWrite(path string, data []byte) error

AtomicWrite writes data to path atomically using a temp file in the same directory followed by a rename. This ensures that a crash mid-write leaves the existing file intact. If the target file already exists, its permissions are preserved; otherwise 0644 is used.

func AtomicWriteWithPerm

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

AtomicWriteWithPerm writes data to path atomically using a temp file in the same directory followed by a rename. The perm parameter is the fallback permission used when the target file does not yet exist. If the target file already exists, its current permissions are preserved (H-19).