- output("Shrinking image (this may take a while)...", False)
-
- dev = self.g.part_to_dev(self.root)
- parttype = self.g.part_get_parttype(dev)
- if parttype != 'msdos':
- raise FatalError("You have a %s partition table. "
- "Only msdos partitions are supported" % parttype)
-
- last_partition = self.g.part_list(dev)[-1]
-
- if last_partition['part_num'] > 4:
- raise FatalError("This disk contains logical partitions. "
- "Only primary partitions are supported.")
-
- part_dev = "%s%d" % (dev, last_partition['part_num'])
- fs_type = self.g.vfs_type(part_dev)
- if not re.match("ext[234]", fs_type):
- warn("Don't know how to resize %s partitions." % vfs_type)
- return
-
- self.g.e2fsck_f(part_dev)
- self.g.resize2fs_M(part_dev)
-
- out = self.g.tune2fs_l(part_dev)
- block_size = int(
- filter(lambda x: x[0] == 'Block size', out)[0][1])
- block_cnt = int(
- filter(lambda x: x[0] == 'Block count', out)[0][1])
-
- sector_size = self.g.blockdev_getss(dev)
-
- start = last_partition['part_start'] / sector_size
- end = start + (block_size * block_cnt) / sector_size - 1
-
- self.g.part_del(dev, last_partition['part_num'])
- self.g.part_add(dev, 'p', start, end)
-
- new_size = (end + 1) * sector_size
- success("new image size is %dMB" %
- ((new_size + 2 ** 20 - 1) // 2 ** 20))
- return new_size
-
- def size(self):
- """Returns the "payload" size of the device.
-
- The size returned by this method is the size of the space occupied by
- the partitions (including the space before the first partition).
- """
- dev = self.g.part_to_dev(self.root)
- last = self.g.part_list(dev)[-1]
-
- return last['part_end'] + 1
-
- def dump(self, outfile):
- """Dumps the content of device into a file.
-
- This method will only dump the actual payload, found by reading the
- partition table. Empty space in the end of the device will be ignored.
- """
- blocksize = 2 ** 22 # 4MB
- size = self.size()
- progress_size = (size + 2 ** 20 - 1) // 2 ** 20 # in MB
- progressbar = progress("Dumping image file: ", 'mb')
- progressbar.max = progress_size
- source = open(self.device, "r")
- try:
- dest = open(outfile, "w")
- try:
- left = size
- offset = 0
- progressbar.next()
- while left > 0:
- length = min(left, blocksize)
- sent = sendfile(dest.fileno(), source.fileno(), offset,
- length)
- offset += sent
- left -= sent
- progressbar.goto((size - left) // 2 ** 20)
- finally:
- dest.close()
- finally:
- source.close()
-
- output("\rDumping image file...\033[K", False)
- success('image file %s was successfully created' % outfile)