From cc3678730c97244efe1e8a2a5b1b0b323a7beb7a Mon Sep 17 00:00:00 2001
From: David Hummel <david_hummel@hms.harvard.edu>
Date: Sat, 7 Dec 2013 21:10:42 -0500
Subject: [PATCH] Fix issue #5214: hostname persistence on RedHat/CentOS

---
 library/system/hostname | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/library/system/hostname b/library/system/hostname
index 0dafdf778d..9aa7c206a4 100644
--- a/library/system/hostname
+++ b/library/system/hostname
@@ -203,15 +203,19 @@ class RedHatStrategy(GenericStrategy):
     def set_permanent_hostname(self, name):
         try:
             lines = []
+            found = False
             f = open(self.NETWORK_FILE, 'rb')
             try:
                 for line in f.readlines():
                     if line.startswith('HOSTNAME'):
                         lines.append("HOSTNAME=%s\n" % name)
+                        found = True
                     else:
                         lines.append(line)
             finally:
                 f.close()
+            if not found:
+                lines.append("HOSTNAME=%s\n" % name)
             f = open(self.NETWORK_FILE, 'w+')
             try:
                 f.writelines(lines)