From 59737fb0190d04f95b2f9fd5eb1b518a710886a4 Mon Sep 17 00:00:00 2001
From: tastytea <tastytea@tastytea.de>
Date: Sat, 3 Oct 2015 16:50:37 +0200
Subject: [PATCH] Fix mbr_size() for older versions of util_linux

---
 hashboot.sh | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/hashboot.sh b/hashboot.sh
index 39fe4e3..d7efc2e 100755
--- a/hashboot.sh
+++ b/hashboot.sh
@@ -49,8 +49,13 @@ read_config ()
 mbr_size ()
 {
     # Find out where the first partition starts returns(prints) size in KiB
-    sectorsize=$(LC_ALL=C fdisk -l /dev/sda | grep '^Units:' | awk '{print $8}')
-    startsector=$(LC_ALL=C fdisk -l /dev/sda | grep -A1 '^Device' | tail -n1 | awk '{print $3}')
+    sectorsize=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep '^Units' | awk '{print $8}')
+    if [ "${sectorsize}" == "=" ] # Older versions of util-linux
+    then
+        sectorsize=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep '^Units' | awk '{print $9}')
+    fi
+    startsector=$(LC_ALL=C fdisk -l ${MBR_DEVICE} | grep -A1 'Device' | tail -n1 | awk '{print $3}')
+    
     expr ${sectorsize} \* ${startsector} / 1024
 }