Function copyReader

get_file_copy.go:34–54

copyReader copies from an io.Reader into a file, using umask to create the dst file

(dst string, src io.Reader, fmode, umask os.FileMode, fileSizeLimit int64)

// copyReader copies from an io.Reader into a file, using umask to create the dst file
func copyReader(dst string, src io.Reader, fmode, umask os.FileMode, fileSizeLimit int64) error {
	dstF, err := os.OpenFile(dst, os.O_RDWR|os.O_CREATE|os.O_TRUNC, fmode)
	if err != nil {
		return err
	}
	defer dstF.Close()

	if fileSizeLimit > 0 {
		src = io.LimitReader(src, fileSizeLimit)
	}

	_, err = io.Copy(dstF, src)
	if err != nil {
		return err
	}

	// Explicitly chmod; the process umask is unconditionally applied otherwise.
	// We'll mask the mode with our own umask, but that may be different than
	// the process umask
	return os.Chmod(dst, mode(fmode, umask))
}

// copyFile copies a file in chunks from src path to dst path, using umask to create the dst file
func copyFile(ctx context.Context, dst, src string, disableSymlinks bool, fmode, umask os.FileMode) (int64, error) {