def cleanup(g: guestfs.GuestFS):
"""Shutdown and close the guestfs.GuestFS handle, retrying on failure."""
success = False
for i in range(6):
try:
logging.debug('g.shutdown(): {}'.format(g.shutdown()))
logging.debug('g.close(): {}'.format(g.close()))
success = True
break
except BaseException as raised:
logging.debug('cleanup failed due to: {}'.format(raised))
logging.debug('try again in 10 seconds')
time.sleep(10)
if not success:
logging.debug('Shutdown failed. Continuing anyway.')
class FileSystem:
"""Convenience wrapper over GuestFS instance.
Simplifies some common routines.
Automatically translates paths according to the contained File System.
"""
def __init__(self, disk_path):
self._root = None
self._handler = GuestFS()
self._disk_path = disk_path
def __enter__(self):
self.mount()
return self
def __exit__(self, *_):
self.umount()
def __getattr__(self, attr):
return getattr(self._handler, attr)
@property
def osname(self):
"""Returns the Operating System name."""
return self._handler.inspect_get_type(self._root)
@property
def fsroot(self):
"""Returns the file system root."""
if self.osname == "windows":
return "{}:\\".format(self._handler.inspect_get_drive_mappings(self._root)[0][0])
else:
return self._handler.inspect_get_mountpoints(self._root)[0][0]
def mount(self, readonly=True):
"""Mounts the given disk.
It must be called before any other method.
"""
self._handler.add_drive_opts(self._disk_path, readonly=True)
self._handler.launch()
for mountpoint, device in self._inspect_disk():
if readonly:
self._handler.mount_ro(device, mountpoint)
else:
self._handler.mount(device, mountpoint)
if self._handler.inspect_get_type(self._root) == "windows":
self.path = self._windows_path
else:
self.path = posix_path
def _inspect_disk(self):
"""Inspects the disk and returns the mountpoints mapping
as a list which order is the supposed one for correct mounting.
"""
roots = self._handler.inspect_os()
if roots:
self._root = roots[0]
return sorted(self._handler.inspect_get_mountpoints(self._root), key=lambda m: len(m[0]))
else:
raise RuntimeError("No OS found on the given disk image.")
def umount(self):
"""Unmounts the disk.
After this method is called no further action is allowed.
"""
self._handler.close()
def download(self, source, destination):
"""Downloads the file on the disk at source into destination."""
self._handler.download(posix_path(source), destination)
def ls(self, path):
"""Lists the content at the given path."""
return self._handler.ls(posix_path(path))
def nodes(self, path):
"""Iterates over the files and directories contained within the disk
starting from the given path.
Yields the path of the nodes.
"""
path = posix_path(path)
yield from (self.path(path, e) for e in self._handler.find(path))
def checksum(self, path, hashtype="sha1"):
"""Returns the checksum of the given path."""
return self._handler.checksum(hashtype, posix_path(path))
def checksums(self, path, hashtype="sha1"):
"""Iterates over the files hashes contained within the disk
starting from the given path.
The hashtype keyword allows to choose the file hashing algorithm.
Yields the following values:
"C:\\Windows\\System32\\NTUSER.DAT", "hash" for windows
"/home/user/text.txt", "hash" for other FS
"""
with NamedTemporaryFile(buffering=0) as tempfile:
self._handler.checksums_out(hashtype, posix_path(path), tempfile.name)
yield from (
(self.path(f[1].lstrip(".")), f[0]) for f in (l.decode("utf8").strip().split(None, 1) for l in tempfile)
)
def stat(self, path):
"""Retrieves the status of the node at the given path.
Returns a dictionary.
"""
return self._handler.stat(posix_path(path))
def file(self, path):
"""Analogous to Unix file command.
Returns the type of node at the given path.
"""
return self._handler.file(posix_path(path))
def exists(self, path):
"""Returns whether the path exists."""
return self._handler.exists(posix_path(path))
def path(self, *segments):
"""Normalizes the path returned by guestfs in the File System format."""
raise NotImplementedError("FileSystem needs to be mounted first")
def _windows_path(self, *segments):
drive = self._handler.inspect_get_drive_mappings(self._root)[0][0]
return "%s:%s" % (drive, os.path.join(*segments).replace("/", "\\"))
class FileSystem:
"""Convenience wrapper over GuestFS instance.
Simplifies some common routines.
Automatically translates paths according to the contained File System.
"""
def __init__(self, disk_path):
self._root = None
self._handler = GuestFS()
self.disk_path = disk_path
def __enter__(self):
self.mount()
return self
def __exit__(self, *_):
self.umount()
def __getattr__(self, attr):
return getattr(self._handler, attr)
@property
def osname(self):
"""Returns the Operating System name."""
return self._handler.inspect_get_type(self._root)
@property
def fsroot(self):
"""Returns the file system root."""
if self.osname == 'windows':
return '{}:\\'.format(
self._handler.inspect_get_drive_mappings(self._root)[0][0])
else:
return self._handler.inspect_get_mountpoints(self._root)[0][0]
def mount(self, readonly=True):
"""Mounts the given disk.
It must be called before any other method.
"""
self._handler.add_drive_opts(self.disk_path, readonly=True)
self._handler.launch()
for mountpoint, device in self._inspect_disk():
if readonly:
self._handler.mount_ro(device, mountpoint)
else:
self._handler.mount(device, mountpoint)
if self._handler.inspect_get_type(self._root) == 'windows':
self.path = self._windows_path
else:
self.path = posix_path
def _inspect_disk(self):
"""Inspects the disk and returns the mountpoints mapping
as a list which order is the supposed one for correct mounting.
"""
roots = self._handler.inspect_os()
if roots:
self._root = roots[0]
return sorted(self._handler.inspect_get_mountpoints(self._root),
key=lambda m: len(m[0]))
else:
raise RuntimeError("No OS found on the given disk image.")
def umount(self):
"""Unmounts the disk.
After this method is called no further action is allowed.
"""
self._handler.close()
def download(self, source, destination):
"""Downloads the file on the disk at source into destination."""
self._handler.download(posix_path(source), destination)
def ls(self, path):
"""Lists the content at the given path."""
return self._handler.ls(posix_path(path))
def nodes(self, path):
"""Iterates over the files and directories contained within the disk
starting from the given path.
Yields the path of the nodes.
"""
path = posix_path(path)
yield from (self.path(path, e) for e in self._handler.find(path))
def checksum(self, path, hashtype='sha1'):
"""Returns the checksum of the given path."""
return self._handler.checksum(hashtype, posix_path(path))
def checksums(self, path, hashtype='sha1'):
"""Iterates over the files hashes contained within the disk
starting from the given path.
The hashtype keyword allows to choose the file hashing algorithm.
Yields the following values:
"C:\\Windows\\System32\\NTUSER.DAT", "hash" for windows
"/home/user/text.txt", "hash" for other FS
"""
with NamedTemporaryFile(buffering=0) as tempfile:
self._handler.checksums_out(hashtype, posix_path(path),
tempfile.name)
yield from ((self.path(f[1].lstrip('.')), f[0])
for f in (l.decode('utf8').strip().split(None, 1)
for l in tempfile))
def stat(self, path):
"""Retrieves the status of the node at the given path.
Returns a dictionary.
"""
return self._handler.stat(posix_path(path))
def file(self, path):
"""Analogous to Unix file command.
Returns the type of node at the given path.
"""
return self._handler.file(posix_path(path))
def exists(self, path):
"""Returns whether the path exists."""
return self._handler.exists(posix_path(path))
def path(self, *segments):
"""Normalizes the path returned by guestfs in the File System format."""
raise NotImplementedError("FileSystem needs to be mounted first")
def _windows_path(self, *segments):
drive = self._handler.inspect_get_drive_mappings(self._root)[0][0]
return "%s:%s" % (drive, os.path.join(*segments).replace('/', '\\'))
