use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/widechar.h b/libblkid/widechar.h
new file mode 100644
index 0000000..b023b5f
--- /dev/null
+++ b/libblkid/widechar.h
@@ -0,0 +1,38 @@
+/* Declarations for wide characters */
+/* This file must be included last because the redefinition of wchar_t may
+ cause conflicts when system include files were included after it. */
+
+#ifdef HAVE_WIDECHAR
+
+# include <wchar.h>
+# include <wctype.h>
+
+#else /* !HAVE_WIDECHAR */
+
+# include <ctype.h>
+ /* Fallback for types */
+# define wchar_t char
+# define wint_t int
+# define WEOF EOF
+ /* Fallback for input operations */
+# define fgetwc fgetc
+# define getwc getc
+# define getwchar getchar
+# define fgetws fgets
+ /* Fallback for output operations */
+# define fputwc fputc
+# define putwc putc
+# define putwchar putchar
+# define fputws fputs
+ /* Fallback for character classification */
+# define iswgraph isgraph
+# define iswprint isprint
+# define iswspace isspace
+ /* Fallback for string functions */
+# define wcschr strchr
+# define wcsdup strdup
+# define wcslen strlen
+
+# define wcwidth(c) 1
+
+#endif /* HAVE_WIDECHAR */