use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/xalloc.h b/libblkid/xalloc.h
new file mode 100644
index 0000000..7b685e7
--- /dev/null
+++ b/libblkid/xalloc.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2010 Davidlohr Bueso <dave@gnu.org>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ *
+ * General memory allocation wrappers for malloc, realloc, calloc and strdup
+ */
+
+#ifndef UTIL_LINUX_XALLOC_H
+#define UTIL_LINUX_XALLOC_H
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "c.h"
+
+#ifndef XALLOC_EXIT_CODE
+# define XALLOC_EXIT_CODE EXIT_FAILURE
+#endif
+
+static inline __ul_alloc_size(1)
+void *xmalloc(const size_t size)
+{
+ void *ret = malloc(size);
+
+ if (!ret && size)
+ err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
+ return ret;
+}
+
+static inline __ul_alloc_size(2)
+void *xrealloc(void *ptr, const size_t size)
+{
+ void *ret = realloc(ptr, size);
+
+ if (!ret && size)
+ err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
+ return ret;
+}
+
+static inline __ul_calloc_size(1, 2)
+void *xcalloc(const size_t nelems, const size_t size)
+{
+ void *ret = calloc(nelems, size);
+
+ if (!ret && size && nelems)
+ err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
+ return ret;
+}
+
+static inline char *xstrdup(const char *str)
+{
+ char *ret;
+
+ if (!str)
+ return NULL;
+
+ ret = strdup(str);
+
+ if (!ret)
+ err(XALLOC_EXIT_CODE, "cannot duplicate string");
+ return ret;
+}
+
+static inline int __attribute__ ((__format__(printf, 2, 3)))
+ xasprintf(char **strp, const char *fmt, ...)
+{
+ int ret;
+ va_list args;
+ va_start(args, fmt);
+ ret = vasprintf(&(*strp), fmt, args);
+ va_end(args);
+ if (ret < 0)
+ err(XALLOC_EXIT_CODE, "cannot allocate string");
+ return ret;
+}
+
+
+static inline char *xgethostname(void)
+{
+ char *name;
+ size_t sz = get_hostname_max() + 1;
+
+ name = xmalloc(sizeof(char) * sz);
+ if (gethostname(name, sz) != 0)
+ return NULL;
+
+ name[sz - 1] = '\0';
+ return name;
+}
+
+#endif