From 7fdf77b163b572578c3fd9bbf73bed091bd640eb Mon Sep 17 00:00:00 2001
From: thomas <kreitler@molgen.mpg.de>
Date: Mon, 25 Sep 2017 13:25:34 +0200
Subject: [PATCH 1/2] mxgrub: list --test option in usage message

---
 mxgrub/mxgrub | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mxgrub/mxgrub b/mxgrub/mxgrub
index 5c80f86..330298d 100755
--- a/mxgrub/mxgrub
+++ b/mxgrub/mxgrub
@@ -10,6 +10,7 @@ sub USAGE { return <<"EOF" }
     $0 --list      : list available labels
     $0 --update    : only scan /boot and rewrite grub.cfg
     $0 --initramfs : update /boot/grub/initramfs.igz from /project/admin/initramfs
+    $0 --test      : perform miscellaneous tests (VX50 board)
 EOF
 
 sub sys {

From 9a6df45d454c7c6bd739eaeb7a09e1c996082ae6 Mon Sep 17 00:00:00 2001
From: thomas <kreitler@molgen.mpg.de>
Date: Mon, 25 Sep 2017 14:41:02 +0200
Subject: [PATCH 2/2] mxgrub: check for consistent GRUB installation

If a new GRUB package is installed, the GRUB-'machinery' to boot
the host is  still from the old version. The implemented check
accounts for this.
---
 mxgrub/mxgrub | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/mxgrub/mxgrub b/mxgrub/mxgrub
index 330298d..6b2beb6 100755
--- a/mxgrub/mxgrub
+++ b/mxgrub/mxgrub
@@ -42,6 +42,23 @@ sub check_mbr {
 
 }
 
+sub check_grub_installation {
+  my $fingerprint='[ab]*.mod'; # this 'scans' just a dozen, and not 200 files.
+  my $sum_lib  = ` cat /usr/lib/grub/i386-pc/$fingerprint | md5sum `;
+  my $sum_boot = ` cat /boot/grub/i386-pc/$fingerprint | md5sum `;
+  my @root_dev = root_dev();
+
+  warn << "EOF" if $sum_lib ne $sum_boot;
+
+  Note: GRUB version installed in /usr differs from GRUB version used to boot.
+
+  Consider updating the boot-loader with:
+
+           grub-install --boot-directory=/boot $root_dev[1]
+
+EOF
+}
+
 # /usr/include/sys/sysmacros.h
 #  MMMM.MMMM MMMM.MMMM MMMM.MMMM MMMM.MMMM mmmm.mmmm mmmm.MMMM MMMM.MMMM mmmm.mmmm
 
@@ -256,6 +273,8 @@ sub cmd_initramfs {
 	sys('bash','-c','cd /project/admin/initramfs;find .|cpio -H newc -o | gzip > /boot/grub/initramfs.igz');
 }
 
+check_grub_installation
+
 our ($opt_list,$opt_update,$opt_initramfs,$opt_test);
 
 GetOptions(