From 6f57b95df6e3aa1b5b7c163b65059f9067f71eee Mon Sep 17 00:00:00 2001
From: Bob Gilligan <gilligan@vyatta.com>
Date: Tue, 4 May 2010 10:59:49 -0700
Subject: Don't allow the currently running image to be renamed.

Allowing the running image to be renamed introduced several issues.
It is simpler just to dis-allow it.  If the user needs to re-name the
running image, they can reboot on another image, re-name the first
image, then boot back into it.
---
 scripts/rename-image.pl | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/scripts/rename-image.pl b/scripts/rename-image.pl
index d9fbd78..e2e9745 100644
--- a/scripts/rename-image.pl
+++ b/scripts/rename-image.pl
@@ -60,6 +60,17 @@ if (("$new_name" eq "Old-non-image-installation") ||
     exit 1;
 }
 
+my $cmdline=`cat /proc/cmdline`;
+my $cur_name;
+($cur_name, undef) = split(' ', $cmdline);
+$cur_name =~ s/BOOT_IMAGE=\/boot\///;
+$cur_name =~ s/\/vmlinuz.*//;
+
+if ($old_name eq $cur_name) {
+    printf("Can't re-name the running image.\n");
+    exit 1;
+}
+
 if (-e "$image_path/$new_name") {
     printf("New name $new_name already exists.\n");
     exit 1;
-- 
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