[Xen-devel] [PATCH] Make PyGrub run first entry in grub config when invalid default boot option provided

[Michal Novotny <minovotn@xxxxxxxxxx>]

Hello everybody,
I have created a patch for pygrub and I am sending it as an attachment. 
This patch mainly solves the issue of invalid default boot option in 
VM's configuration. If the entry doesn't exist, it doesn't exit with 
IndexError python exception but it uses first entry there to boot up the 
machine - same way like standard (real) grub does...
Signed-off-by: Michal Novotny <minovotn@xxxxxxxxxx>

diff -r e1562a36094e tools/pygrub/src/pygrub
--- a/tools/pygrub/src/pygrub   Thu Mar 19 17:04:06 2009 +0000
+++ b/tools/pygrub/src/pygrub   Fri Mar 20 15:09:31 2009 +0100
@@ -530,7 +530,11 @@
         print "No kernel image selected!"
         sys.exit(1)
 
-    img = g.cf.images[sel]
+    try:
+        img = g.cf.images[sel]
+    except:
+        log.debug("PyGrub: Default selection is not valid, using first boot 
configuration...")
+        img = g.cf.images[0]
 
     grubcfg = { "kernel": None, "ramdisk": None, "args": None }
 

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