Add app for dumping the MBR

Add an app for dumping the MBR. I guess now that everyone is moving to GUID
partition tables (GPTs) this may not be useful forever. Still, I might need it
again.

diff --git a/mbr_dump.sh b/mbr_dump.sh
new file mode 100755 (executable)
index 0000000..dce7962
--- /dev/null
+++ b/mbr_dump.sh
@@ -0,0 +1,24 @@
+#!/bin/sh
+
+#
+# Dumps the bytes representing the four primary partitions in an IBM master
+# boot record
+#
+# Colin McCabe
+#
+
+if [ -e ${1} ]; then
+       PART_FILE=${1}
+else
+       echo "usage: ${0} <IBM-master-boot-record>"
+       echo "should be 512 bytes in length."
+       exit 1
+fi
+echo "# first partition"
+od -j 446 -N 16 -t x1 ${1}
+echo "# second partition"
+od -j 462 -N 16 -t x1 ${1}
+echo "# third partition"
+od -j 478 -N 16 -t x1 ${1}
+echo "# fourth partition"
+od -j 494 -N 16 -t x1 ${1}