Fix for leapp / image mode ffffffff

When manipulating grubby entries with machine-id, if using an image
with improper BLS entry starting with ffffffff, grubby ends up not
touching anything, so fix by falling back to old behavior if nothing
matches machine-id.

Signed-off-by: Marta Lewandowska <mlewando@redhat.com>

grubby-bls

@@ -94,6 +94,17 @@ get_bls_values() {
         echo "${bls}"
     done | /usr/libexec/grubby/rpm-sort -c rpmnvrcmp 2>/dev/null | tac)) || :
 
+    if [[ -z ${files} ]]; then
+        files=($(for bls in ${blsdir}/*.conf ; do
+            if ! [[ -e "${bls}" ]] ; then
+                continue
+            fi
+            bls="${bls%.conf}"
+            bls="${bls##*/}"
+            echo "${bls}"
+        done | /usr/libexec/grubby/rpm-sort -c rpmnvrcmp 2>/dev/null | tac)) || :
+    fi
+
     for bls in "${files[@]}" ; do
         blspath="${blsdir}/${bls}.conf"
         bls_file[$count]="${blspath}"

grubby.spec

@@ -1,6 +1,6 @@
 Name: grubby
 Version: 8.40
-Release: 50%{?dist}
+Release: 51%{?dist}
 Summary: Command line tool for updating BootLoaderSpec files
 License: GPLv2+
 URL: https://github.com/rhinstaller/grubby
@@ -169,6 +169,10 @@ current boot environment.
 %{_mandir}/man8/*.8*
 
 %changelog
+* Thu Jul 23 2026 Marta Lewandowska <mlewando@redhat.com> - 8.40-51
+- Have grubby only manipulate relevant entries, fallback if empty
+- Resolves: #RHEL-132931
+
 * Fri Jul 03 2026 Marta Lewandowska <mlewando@redhat.com> - 8.40-50
 - Have grubby only manipulate and display relevant entries
 - Resolves: #RHEL-132931