Function WriteFile

lib/fs/filesystem.go:371–381

WriteFile writes data to the named file, creating it if necessary. If the file does not exist, WriteFile creates it with permissions perm (before umask); otherwise WriteFile truncates it before writing, without changing permissions. Since Writefile requires multiple system calls to complete, a failu

(fs Filesystem, name string, data []byte, perm FileMode)

// Since Writefile requires multiple system calls to complete, a failure mid-operation
// can leave the file in a partially written state.
func WriteFile(fs Filesystem, name string, data []byte, perm FileMode) error {
	f, err := fs.OpenFile(name, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
	if err != nil {
		return err
	}
	_, err = f.Write(data)
	if err1 := f.Close(); err1 != nil && err == nil {
		err = err1
	}
	return err
}