use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/fileutils.c b/libblkid/fileutils.c
new file mode 100644
index 0000000..ebfb128
--- /dev/null
+++ b/libblkid/fileutils.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2012 Sami Kerola <kerolasa@iki.fi>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+
+#include "c.h"
+#include "fileutils.h"
+#include "pathnames.h"
+#include "xalloc.h"
+
+#define _PATH_TMP "/tmp"
+/* Create open temporary file in safe way. Please notice that the
+ * file permissions are -rw------- by default. */
+int xmkstemp(char **tmpname, char *dir)
+{
+ char *localtmp;
+ char *tmpenv;
+ mode_t old_mode;
+ int fd;
+
+ /* Some use cases must be capable of being moved atomically
+ * with rename(2), which is the reason why dir is here. */
+ if (dir != NULL)
+ tmpenv = dir;
+ else
+ tmpenv = getenv("TMPDIR");
+
+ if (tmpenv)
+ xasprintf(&localtmp, "%s/%s.XXXXXX", tmpenv,
+ program_invocation_short_name);
+ else
+ xasprintf(&localtmp, "%s/%s.XXXXXX", _PATH_TMP,
+ program_invocation_short_name);
+ old_mode = umask(077);
+ fd = mkstemp(localtmp);
+ umask(old_mode);
+ if (fd == -1) {
+ free(localtmp);
+ localtmp = NULL;
+ }
+ *tmpname = localtmp;
+ return fd;
+}
+
+/*
+ * portable getdtablesize()
+ */
+int get_fd_tabsize(void)
+{
+ int m;
+
+#if defined(HAVE_GETDTABLESIZE)
+ m = getdtablesize();
+#elif defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)
+ struct rlimit rl;
+
+ getrlimit(RLIMIT_NOFILE, &rl);
+ m = rl.rlim_cur;
+#elif defined(HAVE_SYSCONF) && defined(_SC_OPEN_MAX)
+ m = sysconf(_SC_OPEN_MAX);
+#else
+ m = OPEN_MAX;
+#endif
+ return m;
+}
+
+#ifdef TEST_PROGRAM
+int main(void)
+{
+ FILE *f;
+ char *tmpname;
+ f = xfmkstemp(&tmpname, NULL);
+ unlink(tmpname);
+ free(tmpname);
+ fclose(f);
+ return EXIT_FAILURE;
+}
+#endif