add volume type fun for windows

cmd/helper_windows.go

@@ -20,6 +20,38 @@ func makeLink(srcPath, destPath string) error {
 	return com.CopyDir(srcPath, destPath)
 }
 
+func volumnType(dir string) string {
+	pd := dir[:3]
+	dll := syscall.MustLoadDLL("kernel32.dll")
+	GetVolumeInformation := dll.MustFindProc("GetVolumeInformationW")
+
+	var volumeNameSize uint32 = 260
+	var nFileSystemNameSize, lpVolumeSerialNumber uint32
+	var lpFileSystemFlags, lpMaximumComponentLength uint32
+	var lpFileSystemNameBuffer, volumeName [260]byte
+	var ps *uint16 = syscall.StringToUTF16Ptr(pd)
+
+	_, _, _ = GetVolumeInformation.Call(uintptr(unsafe.Pointer(ps)),
+		uintptr(unsafe.Pointer(&volumeName)),
+		uintptr(volumeNameSize),
+		uintptr(unsafe.Pointer(&lpVolumeSerialNumber)),
+		uintptr(unsafe.Pointer(&lpMaximumComponentLength)),
+		uintptr(unsafe.Pointer(&lpFileSystemFlags)),
+		uintptr(unsafe.Pointer(&lpFileSystemNameBuffer)),
+		uintptr(unsafe.Pointer(&nFileSystemNameSize)), 0)
+
+	var bytes []byte
+	if lpFileSystemNameBuffer[6] == 0 {
+		bytes = []byte{lpFileSystemNameBuffer[0], lpFileSystemNameBuffer[2],
+			lpFileSystemNameBuffer[4]}
+	} else {
+		bytes = []byte{lpFileSystemNameBuffer[0], lpFileSystemNameBuffer[2],
+			lpFileSystemNameBuffer[4], lpFileSystemNameBuffer[6]}
+	}
+
+	return string(bytes)
+}
+
 func getWindowsVersion() int {
 	dll := syscall.MustLoadDLL("kernel32.dll")
 	p := dll.MustFindProc("GetVersion")