1 files changed, 31 insertions, 0 deletions
diff --git a/lib/wholedisk.c b/lib/wholedisk.c
new file mode 100644
index 00000000..eb6d432c
--- /dev/null
+++ b/lib/wholedisk.c
@@ -0,0 +1,31 @@
+
+#include <ctype.h>
+
+#include "blkdev.h"
+#include "wholedisk.h"
+
+int is_whole_disk(const char *name)
+{
+#ifdef HDIO_GETGEO
+	struct hd_geometry geometry;
+	int fd, i = 0;
+
+	fd = open(name, O_RDONLY);
+	if (fd >= 0) {
+		i = ioctl(fd, HDIO_GETGEO, &geometry);
+		close(fd);
+	}
+	if (i==0)
+		return (fd >= 0 && geometry.start == 0);
+#endif
+	/*
+	 * The "silly heuristic" is still sexy for us, because
+	 * for example Xen doesn't implement HDIO_GETGEO for virtual
+	 * block devices (/dev/xvda).
+	 *
+	 * -- kzak@redhat.com (23-Feb-2006)
+	 */
+	while (*name)
+		name++;
+	return !isdigit(name[-1]);
+}