def __init__(self, screen):
"""
Constructor
@type screen: SnackScreen
@param screen: SnackScreen instance
"""
self.__total = 0
self.__dev = Env.get('systemupdate.disk')
self.__screen = screen
self.__progressBar = Scale(self.__screen.width-35, 100)
self.__msg = TextboxReflowed(self.__screen.width-30, "Preparing system to update PowerKVM")
self.__grid = GridForm(self.__screen, "IBM PowerKVM", 1, 3)
self.__grid.add(self.__progressBar, 0, 0)
self.__grid.add(self.__msg, 0, 1, (0, 1, 0, 0))
def createWorkDirectory(disk):
"""
Create work directory to update system
The work directory is an union between the current root file system and the
cow partition content
@type disk: string
@param disk: path to the disk [/dev/<name>]
@rtype: tuple
@returns: (new root partition, path to the work directory)
"""
if not isBlockDevice(disk):
return (None, None)
currentRoot = getCurrentRootPartition(disk)
if currentRoot is None:
return (None, None)
newRootPartition = getNewRootPartition(disk)
if newRootPartition is None:
return (None, None)
filesystem = Env.get('systemupdate.filesystem')
if filesystem is None:
filesystem = ""
cmd = "union_squashfs_cow %s %s %s \"%s\"" % (currentRoot, TARBALL_REPO, POWERKVM_REPO, filesystem)
status, directory = commands.getstatusoutput(". %s && %s" % (POWERKVM_FUNCTIONS, cmd))
if status != 0:
return (None, None)
if not os.path.exists(directory):
return (None, None)
return (newRootPartition, directory)