euca-bundle-vol does not check rsync return code

Patch from Tim Gerla.

=== modified file 'euca2ools/euca2ools/__init__.py'
--- euca2ools/euca2ools/__init__.py 2010-02-03 22:19:05 +0000
+++ euca2ools/euca2ools/__init__.py 2010-02-16 17:25:19 +0000
@@ -986,7 +986,9 @@
         print "Copying files..."
      for exclude in excludes:
   print "Excluding:", exclude
- output = Popen(rsync_cmd, stdout=PIPE, stderr=PIPE).communicate()
+
+ pipe = Popen(rsync_cmd, stdout=PIPE, stderr=PIPE)
+ output = pipe.communicate()
         for dir in self.img.ESSENTIAL_DIRS:
             dir_path = os.path.join(mount_point, dir)
             if not os.path.exists(dir_path):
@@ -1010,8 +1012,15 @@
           print 'Making essential directory %s' % mount_location
       os.makedirs(dir_path)
  mtab_file.close()
- if output[1]:
- raise CopyError
+ if pipe.returncode:
+ # rsync return code 23: Partial transfer due to error
+ # rsync return code 24: Partial transfer due to vanished source files
+ if pipe.returncode in (23, 24):
+ print "Warning: rsync reports files partially copied:"
+ print output
+ else:
+ print "Error: rsync failed with return code %d" % pipe.returncode
+ raise CopyError

     def unmount_image(self, mount_point):
         try: