const os.O_WRONLY

3 uses

	os (current package)
		dir.go#L180: 		w, err := OpenFile(newPath, O_CREATE|O_EXCL|O_WRONLY, 0666|info.Mode()&0777)
		file.go#L81: 	O_WRONLY int = syscall.O_WRONLY // open the file write-only.
		file.go#L831: 	f, err := OpenFile(name, O_WRONLY|O_CREATE|O_TRUNC, perm)