const os.O_WRONLY

3 uses

	os (current package)
		file.go#L75: 	O_WRONLY int = syscall.O_WRONLY // open the file write-only.
		file.go#L761: 	f, err := OpenFile(name, O_WRONLY|O_CREATE|O_TRUNC, perm)

	go.uber.org/zap
		sink.go#L158: 	return sr.openFile(path, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0o666)