Blacklist the live image backing device

We can't let the user install to the usb key holding their live
image without causing significant trouble.  So blacklist that dev

1 files changed, 10 insertions, 0 deletions

diff --git a/storage/udev.py b/storage/udev.py
index e8e824698..38946482c 100644
--- a/storage/udev.py
+++ b/storage/udev.py
@@ -22,6 +22,7 @@
 
 import os
 import re
+import stat
 
 import iutil
 from errors import *
@@ -43,6 +44,15 @@ def __is_blacklisted_blockdev(dev_name):
     """Is this a blockdev we never want for an install?"""
     if dev_name.startswith("loop") or dev_name.startswith("ram"):
         return True
+    # FIXME: the backing dev for the live image can't be used as an
+    # install target.  note that this is a little bit of a hack 
+    # since we're assuming that /dev/live will exist
+    if os.path.exists("/dev/live") and \
+            stat.S_ISBLK(os.stat("/dev/live")[stat.ST_MODE]):
+        livetarget = os.path.realpath("/dev/live")
+        if livetarget.startswith(dev_name):
+            log.info("%s looks to be the live device; ignoring" % (dev_name,))
+            return True
 
     return False