From 75b64105fafd33c96a53e37222af8b4d4ed9d393 Mon Sep 17 00:00:00 2001
From: Bob Gilligan <gilligan@vyatta.com>
Date: Wed, 19 Oct 2011 17:14:00 -0700
Subject: Bugfix 7502: Make "rename system image" work correctly on Xen.

---
 scripts/rename-image.pl | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/scripts/rename-image.pl b/scripts/rename-image.pl
index 837a3ad..fcdf624 100644
--- a/scripts/rename-image.pl
+++ b/scripts/rename-image.pl
@@ -25,6 +25,9 @@ use warnings;
 use Getopt::Long;
 use File::Temp qw/ tempfile tempdir /;
 
+my $UNION_BOOT = '/live/image/boot';
+my $XEN_DEFAULT_IMAGE = "$UNION_BOOT/%%default_image";
+
 my $old_name;
 my $new_name;
 
@@ -55,7 +58,8 @@ if (("$new_name" eq "Old-non-image-installation") ||
     ("$new_name" =~ /^initrd/) ||
     ("$new_name" =~ /^vmlinuz/) ||
     ("$new_name" =~ /^System\.map/) ||
-    ("$new_name" =~ /^config-/)) {
+    ("$new_name" =~ /^config-/) ||
+    ("$new_name" =~ /^%%/)) {
     printf("Can't use reserved image name.\n");
     exit 1;
 }
@@ -63,8 +67,13 @@ if (("$new_name" eq "Old-non-image-installation") ||
 my $cmdline=`cat /proc/cmdline`;
 my $cur_name;
 ($cur_name, undef) = split(' ', $cmdline);
-$cur_name =~ s/BOOT_IMAGE=\/boot\///;
-$cur_name =~ s/\/vmlinuz.*//;
+if ($cur_name =~ s/BOOT_IMAGE=\/boot\///) {
+    $cur_name =~ s/\/vmlinuz.*//;
+} else {
+    if (-l $XEN_DEFAULT_IMAGE) {
+	$cur_name = readlink($XEN_DEFAULT_IMAGE);
+    }
+}
 
 if ($old_name eq $cur_name) {
     printf("Can't re-name the running image.\n");
@@ -105,6 +114,7 @@ close(GRUBFH);
 system("mv $image_path/$old_name $image_path/$new_name");
 system("cp $tmpfilename $image_path/grub/grub.cfg");
 
+
 system("logger -p local3.warning -t 'SystemImage' 'System image $old_name has been renamed $new_name'");
 
 printf("Done.\n");
-- 
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