From 723470df51c6314d166e80636e393316339700a1 Mon Sep 17 00:00:00 2001
From: Awais Belal <awais_belal@mentor.com>
Date: Wed, 16 Jan 2019 16:12:19 +0500
Subject: [PATCH 5/7] init-install-efi: create fallback entry

In case of an update failure we need to switch
our bootparams and fallback to the fallback (FB_)
vars which are a known good configuration.

Signed-off-by: Awais Belal <awais_belal@mentor.com>
---
 init-install-efi.sh | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/init-install-efi.sh b/init-install-efi.sh
index ae7e32b..cdab4d6 100644
--- a/init-install-efi.sh
+++ b/init-install-efi.sh
@@ -306,6 +306,18 @@ if [ -f /run/media/$1/EFI/BOOT/grub.cfg ]; then
     # Replace root= and add additional standard boot options
     # We use root as a sentinel value, as vmlinuz is no longer guaranteed
     sed -i "s/ root=[^ ]*/ root=\$RFS rw $rootwait quiet /g" $GRUBCFG
+    # Mentor - SWUpdate - create our fallback menuentry
+    sed -i "1ifallback=1" $GRUBCFG
+    cmd=$(grep "linux " $GRUBCFG)
+    cat >> $GRUBCFG <<FALL_BACK
+menuentry 'fallback'{
+set KERNEL=\$FB_KERNEL
+set RFS=\$FB_RFS
+save_env --file ${GRUBENV#\/boot} KERNEL
+save_env --file ${GRUBENV#\/boot} RFS
+$cmd
+}
+FALL_BACK
 fi
 
 if [ -d /run/media/$1/loader ]; then
-- 
2.11.1