From e61ab3d6e9df542daf79da56cf96ac0dc5c56aa8 Mon Sep 17 00:00:00 2001
From: Abhishek Kumar <abhishek.kumar@shapeblue.com>
Date: Mon, 13 Feb 2023 06:52:33 +0530
Subject: [PATCH] scripts: fix kvm host undefined version (#7179)

On Oracle Linux 9.0, version shows as undefined and even Host.OS shows as "Red".
This change fixes the script to use '/etc/os-release' ins such cases.

Signed-off-by: Abhishek Kumar <abhishek.kumar@shapeblue.com>
---
 scripts/vm/hypervisor/versions.sh | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/scripts/vm/hypervisor/versions.sh b/scripts/vm/hypervisor/versions.sh
index c2f8e343a5c..ea27dc18e01 100755
--- a/scripts/vm/hypervisor/versions.sh
+++ b/scripts/vm/hypervisor/versions.sh
@@ -29,18 +29,33 @@ DIST="Unknown Linux"
 REV="X.Y"
 CODENAME=""
 
-if [ -f /etc/redhat-release ] ; then
+function get_from_redhat_release {
 	DIST=`cat /etc/redhat-release | awk '{print $1}'`
 	CODENAME=`cat /etc/redhat-release | sed s/.*\(// | sed s/\)//`
 	REV=`cat /etc/redhat-release | awk '{print $3,$4}' | grep -o "[0-9.]*"`
-elif [ -f /etc/lsb-release ] ; then
+}
+
+function get_from_lsb_release {
 	DIST=`cat /etc/lsb-release | grep DISTRIB_ID | tr "\n" ' '| sed s/.*=//`
 	REV=`cat /etc/lsb-release | grep DISTRIB_RELEASE | tr "\n" ' '| sed s/.*=//`
 	CODENAME=`cat /etc/lsb-release | grep DISTRIB_CODENAME | tr "\n" ' '| sed s/.*=//`
-elif [ -f /etc/os-release ] ; then
+}
+
+function get_from_os_release {
 	DIST=`grep -e "^NAME=" /etc/os-release | awk -F\" '{print $2}'`
 	REV=`grep -e "^VERSION_ID=" /etc/os-release | awk -F\" '{print $2}'`
 	CODENAME=`grep -e "^PRETTY_NAME=" /etc/os-release | awk -F\" '{print $2}'`
+}
+
+if [ -f /etc/redhat-release ] ; then
+	get_from_redhat_release
+	if [ -z "$REV" ] && [ -f /etc/os-release ]; then
+	    get_from_os_release
+    fi
+elif [ -f /etc/lsb-release ] ; then
+	get_from_lsb_release
+elif [ -f /etc/os-release ] ; then
+	get_from_os_release
 fi
 
 echo Host.OS=${DIST}