# interpreted as representing official policies, either expressed
# or implied, of GRNET S.A.
-from image_creator.util import get_command, warn, progress_generator
-from image_creator import FatalError
-from clint.textui import indent, puts, colored
+from image_creator.util import get_command
+from image_creator.util import warn, progress, success, output, FatalError
import stat
import os
import sys
import guestfs
import time
+from sendfile import sendfile
class DiskError(Exception):
job, args = self._cleanup_jobs.pop()
job(*args)
- def get_device(self):
- """Returns a newly created DiskDevice instance.
-
- This instance is a snapshot of the original source media of
- the Disk instance.
+ def snapshot(self):
+ """Creates a snapshot of the original source media of the Disk
+ instance.
"""
- puts("Examining source media `%s'..." % self.source, False)
+ output("Examining source media `%s'..." % self.source, False)
sourcedev = self.source
mode = os.stat(self.source).st_mode
if stat.S_ISDIR(mode):
- puts(colored.green('looks like a directory'))
+ success('looks like a directory')
return self._losetup(self._dir_to_disk())
elif stat.S_ISREG(mode):
- puts(colored.green('looks like an image file'))
+ success('looks like an image file')
sourcedev = self._losetup(self.source)
elif not stat.S_ISBLK(mode):
raise ValueError("Invalid media source. Only block devices, "
"regular files and directories are supported.")
else:
- puts(colored.green('looks like a block device'))
+ success('looks like a block device')
# Take a snapshot and return it to the user
- puts("Snapshotting media source...", False)
+ output("Snapshotting media source...", False)
size = blockdev('--getsize', sourcedev)
cowfd, cow = tempfile.mkstemp()
os.close(cowfd)
finally:
os.unlink(table)
- puts(colored.green('done'))
- new_device = DiskDevice("/dev/mapper/%s" % snapshot)
+ success('done')
+ return "/dev/mapper/%s" % snapshot
+
+ def get_device(self, media):
+ """Returns a newly created DiskDevice instance."""
+
+ new_device = DiskDevice(media)
self._devices.append(new_device)
new_device.enable()
return new_device
def enable(self):
"""Enable a newly created DiskDevice"""
- self.progressbar = progress_generator("Launching helper VM: ")
- self.progressbar.next()
+ self.progressbar = progress("Launching helper VM: ", "percent")
+ self.progressbar.max = 100
+ self.progressbar.goto(1)
eh = self.g.set_event_callback(self.progress_callback,
guestfs.EVENT_PROGRESS)
self.g.launch()
self.guestfs_enabled = True
self.g.delete_event_callback(eh)
if self.progressbar is not None:
- self.progressbar.send(100)
+ output("\rLaunching helper VM...\033[K", False)
+ success("done")
self.progressbar = None
- puts('Inspecting Operating System...', False)
+ output('Inspecting Operating System...', False)
roots = self.g.inspect_os()
if len(roots) == 0:
raise FatalError("No operating system found")
self.root = roots[0]
self.ostype = self.g.inspect_get_type(self.root)
self.distro = self.g.inspect_get_distro(self.root)
- puts(colored.green('found a %s system' % self.distro))
+ success('found a(n) %s system' % self.distro)
def destroy(self):
"""Destroy this DiskDevice instance."""
position = array[2]
total = array[3]
- self.progressbar.send((position * 100) // total)
-
- if position == total:
- self.progressbar = None
+ self.progressbar.goto((position * 100) // total)
def mount(self):
"""Mount all disk partitions in a correct order."""
+
+ output("Mounting image...", False)
mps = self.g.inspect_get_mountpoints(self.root)
# Sort the keys to mount the fs in a correct order.
try:
self.g.mount(dev, mp)
except RuntimeError as msg:
- print "%s (ignored)" % msg
+ warn("%s (ignored)" % msg)
+ success("done")
def umount(self):
"""Umount all mounted filesystems."""
disk and then updating the partition table. The new disk size
(in bytes) is returned.
"""
- puts("Shrinking image (this may take a while)...", False)
+ output("Shrinking image (this may take a while)...", False)
dev = self.g.part_to_dev(self.root)
parttype = self.g.part_get_parttype(dev)
self.g.e2fsck_f(part_dev)
self.g.resize2fs_M(part_dev)
- output = self.g.tune2fs_l(part_dev)
+ out = self.g.tune2fs_l(part_dev)
block_size = int(
- filter(lambda x: x[0] == 'Block size', output)[0][1])
+ filter(lambda x: x[0] == 'Block size', out)[0][1])
block_cnt = int(
- filter(lambda x: x[0] == 'Block count', output)[0][1])
+ filter(lambda x: x[0] == 'Block count', out)[0][1])
sector_size = self.g.blockdev_getss(dev)
self.g.part_add(dev, 'p', start, end)
new_size = (end + 1) * sector_size
- puts(colored.green("new image size is %dMB\n" % (new_size // 2 ** 20)))
-
+ success("new image size is %dMB" %
+ ((new_size + 2 ** 20 - 1) // 2 ** 20))
return new_size
def size(self):
dev = self.g.part_to_dev(self.root)
last = self.g.part_list(dev)[-1]
- return last['part_end']
+ 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)
# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :