use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/ttyutils.c b/libblkid/ttyutils.c
new file mode 100644
index 0000000..3b5a68c
--- /dev/null
+++ b/libblkid/ttyutils.c
@@ -0,0 +1,94 @@
+/*
+ * No copyright is claimed. This code is in the public domain; do with
+ * it what you wish.
+ *
+ * Written by Karel Zak <kzak@redhat.com>
+ */
+#include <ctype.h>
+
+#include "c.h"
+#include "ttyutils.h"
+
+int get_terminal_width(void)
+{
+#ifdef TIOCGSIZE
+ struct ttysize t_win;
+#endif
+#ifdef TIOCGWINSZ
+ struct winsize w_win;
+#endif
+ const char *cp;
+
+#ifdef TIOCGSIZE
+ if (ioctl (0, TIOCGSIZE, &t_win) == 0)
+ return t_win.ts_cols;
+#endif
+#ifdef TIOCGWINSZ
+ if (ioctl (0, TIOCGWINSZ, &w_win) == 0)
+ return w_win.ws_col;
+#endif
+ cp = getenv("COLUMNS");
+ if (cp) {
+ char *end = NULL;
+ long c;
+
+ errno = 0;
+ c = strtol(cp, &end, 10);
+
+ if (errno == 0 && end && *end == '\0' && end > cp &&
+ c > 0 && c <= INT_MAX)
+ return c;
+ }
+ return 0;
+}
+
+int get_terminal_name(const char **path,
+ const char **name,
+ const char **number)
+{
+ const char *tty;
+ const char *p;
+
+ if (name)
+ *name = NULL;
+ if (path)
+ *path = NULL;
+ if (number)
+ *number = NULL;
+
+ tty = ttyname(STDERR_FILENO);
+ if (!tty)
+ return -1;
+ if (path)
+ *path = tty;
+ tty = strncmp(tty, "/dev/", 5) == 0 ? tty + 5 : tty;
+ if (name)
+ *name = tty;
+ if (number) {
+ for (p = tty; p && *p; p++) {
+ if (isdigit(*p)) {
+ *number = p;
+ break;
+ }
+ }
+ }
+ return 0;
+}
+
+
+#ifdef TEST_PROGRAM
+# include <stdlib.h>
+int main(void)
+{
+ const char *path, *name, *num;
+
+ if (get_terminal_name(&path, &name, &num) == 0) {
+ fprintf(stderr, "tty path: %s\n", path);
+ fprintf(stderr, "tty name: %s\n", name);
+ fprintf(stderr, "tty number: %s\n", num);
+ }
+ fprintf(stderr, "tty width: %d\n", get_terminal_width());
+
+ return EXIT_SUCCESS;
+}
+#endif