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import glob, re, os, json, time, hashlib
import pathlib, traceback
from collections import OrderedDict
from .exceptions import DiskError
from .general import *
from .output import log, LOG_LEVELS
from .storage import storage
ROOT_DIR_PATTERN = re.compile('^.*?/devices')
GPT = 0b00000001
MBR = 0b00000010
#import ctypes
#import ctypes.util
#libc = ctypes.CDLL(ctypes.util.find_library('c'), use_errno=True)
#libc.mount.argtypes = (ctypes.c_char_p, ctypes.c_char_p, ctypes.c_char_p, ctypes.c_ulong, ctypes.c_char_p)
class BlockDevice():
def __init__(self, path, info=None):
if not info:
# If we don't give any information, we need to auto-fill it.
# Otherwise any subsequent usage will break.
info = all_disks()[path].info
self.path = path
self.info = info
self.keep_partitions = True
self.part_cache = OrderedDict()
# TODO: Currently disk encryption is a BIT misleading.
# It's actually partition-encryption, but for future-proofing this
# I'm placing the encryption password on a BlockDevice level.
self.encryption_password = None
def __repr__(self, *args, **kwargs):
return f"BlockDevice({self.device})"
def __iter__(self):
for partition in self.partitions:
yield self.partitions[partition]
def __getitem__(self, key, *args, **kwargs):
if key not in self.info:
raise KeyError(f'{self} does not contain information: "{key}"')
return self.info[key]
def json(self):
"""
json() has precedence over __dump__, so this is a way
to give less/partial information for user readability.
"""
return {
'path' : self.path,
'size' : self.info['size'] if 'size' in self.info else '<unknown>',
'model' : self.info['model'] if 'model' in self.info else '<unknown>'
}
def __dump__(self):
return {
'path': self.path,
'info': self.info,
'partition_cache': self.part_cache
}
@property
def device(self):
"""
Returns the actual device-endpoint of the BlockDevice.
If it's a loop-back-device it returns the back-file,
If it's a ATA-drive it returns the /dev/X device
And if it's a crypto-device it returns the parent device
"""
if "type" not in self.info:
raise DiskError(f'Could not locate backplane info for "{self.path}"')
if self.info['type'] == 'loop':
for drive in json.loads(b''.join(sys_command(f'losetup --json', hide_from_log=True)).decode('UTF_8'))['loopdevices']:
if not drive['name'] == self.path: continue
return drive['back-file']
elif self.info['type'] == 'disk':
return self.path
elif self.info['type'][:4] == 'raid':
# This should catch /dev/md## raid devices
return self.path
elif self.info['type'] == 'crypt':
if 'pkname' not in self.info:
raise DiskError(f'A crypt device ({self.path}) without a parent kernel device name.')
return f"/dev/{self.info['pkname']}"
else:
log(f"Unknown blockdevice type for {self.path}: {self.info['type']}", level=LOG_LEVELS.Debug)
# if not stat.S_ISBLK(os.stat(full_path).st_mode):
# raise DiskError(f'Selected disk "{full_path}" is not a block device.')
@property
def partitions(self):
o = b''.join(sys_command(f'partprobe {self.path}'))
#o = b''.join(sys_command('/usr/bin/lsblk -o name -J -b {dev}'.format(dev=dev)))
o = b''.join(sys_command(f'/usr/bin/lsblk -J {self.path}'))
if b'not a block device' in o:
raise DiskError(f'Can not read partitions off something that isn\'t a block device: {self.path}')
if not o[:1] == b'{':
raise DiskError(f'Error getting JSON output from:', f'/usr/bin/lsblk -J {self.path}')
r = json.loads(o.decode('UTF-8'))
if len(r['blockdevices']) and 'children' in r['blockdevices'][0]:
root_path = f"/dev/{r['blockdevices'][0]['name']}"
for part in r['blockdevices'][0]['children']:
part_id = part['name'][len(os.path.basename(self.path)):]
if part_id not in self.part_cache:
## TODO: Force over-write even if in cache?
if part_id not in self.part_cache or self.part_cache[part_id].size != part['size']:
self.part_cache[part_id] = Partition(root_path + part_id, self, part_id=part_id, size=part['size'])
return {k: self.part_cache[k] for k in sorted(self.part_cache)}
@property
def partition(self):
all_partitions = self.partitions
return [all_partitions[k] for k in all_partitions]
@property
def partition_table_type(self):
return GPT
@property
def uuid(self):
log('BlockDevice().uuid is untested!', level=LOG_LEVELS.Warning, fg='yellow')
"""
Returns the disk UUID as returned by lsblk.
This is more reliable than relying on /dev/disk/by-partuuid as
it doesn't seam to be able to detect md raid partitions.
"""
lsblk = b''.join(sys_command(f'lsblk -J -o+UUID {self.path}'))
for partition in json.loads(lsblk.decode('UTF-8'))['blockdevices']:
return partition.get('uuid', None)
def has_partitions(self):
return len(self.partitions)
def has_mount_point(self, mountpoint):
for partition in self.partitions:
if self.partitions[partition].mountpoint == mountpoint:
return True
return False
def flush_cache(self):
self.part_cache = OrderedDict()
class Partition():
def __init__(self, path :str, block_device :BlockDevice, part_id=None, size=-1, filesystem=None, mountpoint=None, encrypted=False, autodetect_filesystem=True):
if not part_id:
part_id = os.path.basename(path)
self.block_device = block_device
self.path = path
self.part_id = part_id
self.mountpoint = mountpoint
self.target_mountpoint = mountpoint
self.filesystem = filesystem
self.size = size # TODO: Refresh?
self._encrypted = None
self.encrypted = encrypted
self.allow_formatting = False # A fail-safe for unconfigured partitions, such as windows NTFS partitions.
if mountpoint:
self.mount(mountpoint)
mount_information = get_mount_info(self.path)
if self.mountpoint != mount_information.get('target', None) and mountpoint:
raise DiskError(f"{self} was given a mountpoint but the actual mountpoint differs: {mount_information.get('target', None)}")
if (target := mount_information.get('target', None)):
self.mountpoint = target
if not self.filesystem and autodetect_filesystem:
if (fstype := mount_information.get('fstype', get_filesystem_type(path))):
self.filesystem = fstype
if self.filesystem == 'crypto_LUKS':
self.encrypted = True
def __lt__(self, left_comparitor):
if type(left_comparitor) == Partition:
left_comparitor = left_comparitor.path
else:
left_comparitor = str(left_comparitor)
return self.path < left_comparitor # Not quite sure the order here is correct. But /dev/nvme0n1p1 comes before /dev/nvme0n1p5 so seems correct.
def __repr__(self, *args, **kwargs):
mount_repr = ''
if self.mountpoint:
mount_repr = f", mounted={self.mountpoint}"
elif self.target_mountpoint:
mount_repr = f", rel_mountpoint={self.target_mountpoint}"
if self._encrypted:
return f'Partition(path={self.path}, size={self.size}, real_device={self.real_device}, fs={self.filesystem}{mount_repr})'
else:
return f'Partition(path={self.path}, size={self.size}, fs={self.filesystem}{mount_repr})'
@property
def uuid(self) -> str:
"""
Returns the PARTUUID as returned by lsblk.
This is more reliable than relying on /dev/disk/by-partuuid as
it doesn't seam to be able to detect md raid partitions.
"""
lsblk = b''.join(sys_command(f'lsblk -J -o+PARTUUID {self.path}'))
for partition in json.loads(lsblk.decode('UTF-8'))['blockdevices']:
return partition.get('partuuid', None)
@property
def encrypted(self):
return self._encrypted
@encrypted.setter
def encrypted(self, value :bool):
if value:
log(f'Marking {self} as encrypted: {value}', level=LOG_LEVELS.Debug)
log(f"Callstrack when marking the partition: {''.join(traceback.format_stack())}", level=LOG_LEVELS.Debug)
self._encrypted = value
@property
def parent(self):
return self.real_device
@property
def real_device(self):
for blockdevice in json.loads(b''.join(sys_command('lsblk -J')).decode('UTF-8'))['blockdevices']:
if (parent := self.find_parent_of(blockdevice, os.path.basename(self.path))):
return f"/dev/{parent}"
# raise DiskError(f'Could not find appropriate parent for encrypted partition {self}')
return self.path
def detect_inner_filesystem(self, password):
log(f'Trying to detect inner filesystem format on {self} (This might take a while)', level=LOG_LEVELS.Info)
from .luks import luks2
try:
with luks2(self, 'luksloop', password, auto_unmount=True) as unlocked_device:
return unlocked_device.filesystem
except SysCallError:
return None
def has_content(self):
if not get_filesystem_type(self.path):
return False
temporary_mountpoint = '/tmp/'+hashlib.md5(bytes(f"{time.time()}", 'UTF-8')+os.urandom(12)).hexdigest()
temporary_path = pathlib.Path(temporary_mountpoint)
temporary_path.mkdir(parents=True, exist_ok=True)
if (handle := sys_command(f'/usr/bin/mount {self.path} {temporary_mountpoint}')).exit_code != 0:
raise DiskError(f'Could not mount and check for content on {self.path} because: {b"".join(handle)}')
files = len(glob.glob(f"{temporary_mountpoint}/*"))
sys_command(f'/usr/bin/umount {temporary_mountpoint}')
temporary_path.rmdir()
return True if files > 0 else False
def safe_to_format(self):
if self.allow_formatting is False:
log(f"Partition {self} is not marked for formatting.", level=LOG_LEVELS.Debug)
return False
elif self.target_mountpoint == '/boot':
try:
if self.has_content():
log(f"Partition {self} is a boot partition and has content inside.", level=LOG_LEVELS.Debug)
return False
except SysCallError as err:
log(err.message, LOG_LEVELS.Debug)
log(f"Partition {self} was identified as /boot but we could not mount to check for content, continuing!", level=LOG_LEVELS.Debug)
pass
return True
def encrypt(self, *args, **kwargs):
"""
A wrapper function for luks2() instances and the .encrypt() method of that instance.
"""
from .luks import luks2
if not self._encrypted:
raise DiskError(f"Attempting to encrypt a partition that was not marked for encryption: {self}")
if not self.safe_to_format():
log(f" * Partition {self} was marked as protected but encrypt() was called on it! * ", level=LOG_LEVELS.Error, fg='red')
return False
handle = luks2(self, None, None)
return handle.encrypt(self, *args, **kwargs)
def format(self, filesystem=None, path=None, allow_formatting=None, log_formatting=True):
"""
Format can be given an overriding path, for instance /dev/null to test
the formatting functionality and in essence the support for the given filesystem.
"""
if filesystem is None:
filesystem = self.filesystem
if path is None:
path = self.path
if allow_formatting is None:
allow_formatting = self.allow_formatting
# To avoid "unable to open /dev/x: No such file or directory"
start_wait = time.time()
while pathlib.Path(path).exists() is False and time.time() - start_wait < 10:
time.sleep(0.025)
if not allow_formatting:
raise PermissionError(f"{self} is not formatable either because instance is locked ({self.allow_formatting}) or a blocking flag was given ({allow_formatting})")
if log_formatting:
log(f'Formatting {path} -> {filesystem}', level=LOG_LEVELS.Info)
if filesystem == 'btrfs':
o = b''.join(sys_command(f'/usr/bin/mkfs.btrfs -f {path}'))
if b'UUID' not in o:
raise DiskError(f'Could not format {path} with {filesystem} because: {o}')
self.filesystem = 'btrfs'
elif filesystem == 'vfat':
o = b''.join(sys_command(f'/usr/bin/mkfs.vfat -F32 {path}'))
if (b'mkfs.fat' not in o and b'mkfs.vfat' not in o) or b'command not found' in o:
raise DiskError(f'Could not format {path} with {filesystem} because: {o}')
self.filesystem = 'vfat'
elif filesystem == 'ext4':
if (handle := sys_command(f'/usr/bin/mkfs.ext4 -F {path}')).exit_code != 0:
raise DiskError(f'Could not format {path} with {filesystem} because: {b"".join(handle)}')
self.filesystem = 'ext4'
elif filesystem == 'xfs':
if (handle := sys_command(f'/usr/bin/mkfs.xfs -f {path}')).exit_code != 0:
raise DiskError(f'Could not format {path} with {filesystem} because: {b"".join(handle)}')
self.filesystem = 'xfs'
elif filesystem == 'f2fs':
if (handle := sys_command(f'/usr/bin/mkfs.f2fs -f {path}')).exit_code != 0:
raise DiskError(f'Could not format {path} with {filesystem} because: {b"".join(handle)}')
self.filesystem = 'f2fs'
elif filesystem == 'crypto_LUKS':
# from .luks import luks2
# encrypted_partition = luks2(self, None, None)
# encrypted_partition.format(path)
self.filesystem = 'crypto_LUKS'
else:
raise UnknownFilesystemFormat(f"Fileformat '{filesystem}' is not yet implemented.")
if get_filesystem_type(path) == 'crypto_LUKS' or get_filesystem_type(self.real_device) == 'crypto_LUKS':
self.encrypted = True
else:
self.encrypted = False
return True
def find_parent_of(self, data, name, parent=None):
if data['name'] == name:
return parent
elif 'children' in data:
for child in data['children']:
if (parent := self.find_parent_of(child, name, parent=data['name'])):
return parent
def mount(self, target, fs=None, options=''):
if not self.mountpoint:
log(f'Mounting {self} to {target}', level=LOG_LEVELS.Info)
if not fs:
if not self.filesystem: raise DiskError(f'Need to format (or define) the filesystem on {self} before mounting.')
fs = self.filesystem
pathlib.Path(target).mkdir(parents=True, exist_ok=True)
try:
sys_command(f'/usr/bin/mount {self.path} {target}')
except SysCallError as err:
raise err
self.mountpoint = target
return True
def unmount(self):
try:
exit_code = sys_command(f'/usr/bin/umount {self.path}').exit_code
except SysCallError as err:
exit_code = err.exit_code
# Without to much research, it seams that low error codes are errors.
# And above 8k is indicators such as "/dev/x not mounted.".
# So anything in between 0 and 8k are errors (?).
if exit_code > 0 and exit_code < 8000:
raise err
self.mountpoint = None
return True
def umount(self):
return self.unmount()
def filesystem_supported(self):
"""
The support for a filesystem (this partition) is tested by calling
partition.format() with a path set to '/dev/null' which returns two exceptions:
1. SysCallError saying that /dev/null is not formattable - but the filesystem is supported
2. UnknownFilesystemFormat that indicates that we don't support the given filesystem type
"""
try:
self.format(self.filesystem, '/dev/null', log_formatting=False, allow_formatting=True)
except SysCallError:
pass # We supported it, but /dev/null is not formatable as expected so the mkfs call exited with an error code
except UnknownFilesystemFormat as err:
raise err
return True
class Filesystem():
# TODO:
# When instance of a HDD is selected, check all usages and gracefully unmount them
# as well as close any crypto handles.
def __init__(self, blockdevice, mode=GPT):
self.blockdevice = blockdevice
self.mode = mode
def __enter__(self, *args, **kwargs):
if self.blockdevice.keep_partitions is False:
log(f'Wiping {self.blockdevice} by using partition format {self.mode}', level=LOG_LEVELS.Debug)
if self.mode == GPT:
if self.raw_parted(f'{self.blockdevice.device} mklabel gpt').exit_code == 0:
self.blockdevice.flush_cache()
return self
else:
raise DiskError(f'Problem setting the partition format to GPT:', f'/usr/bin/parted -s {self.blockdevice.device} mklabel gpt')
else:
raise DiskError(f'Unknown mode selected to format in: {self.mode}')
# TODO: partition_table_type is hardcoded to GPT at the moment. This has to be changed.
elif self.mode == self.blockdevice.partition_table_type:
log(f'Kept partition format {self.mode} for {self.blockdevice}', level=LOG_LEVELS.Debug)
else:
raise DiskError(f'The selected partition table format {self.mode} does not match that of {self.blockdevice}.')
return self
def __repr__(self):
return f"Filesystem(blockdevice={self.blockdevice}, mode={self.mode})"
def __exit__(self, *args, **kwargs):
# TODO: https://stackoverflow.com/questions/28157929/how-to-safely-handle-an-exception-inside-a-context-manager
if len(args) >= 2 and args[1]:
raise args[1]
b''.join(sys_command(f'sync'))
return True
def find_partition(self, mountpoint):
for partition in self.blockdevice:
if partition.target_mountpoint == mountpoint or partition.mountpoint == mountpoint:
return partition
def raw_parted(self, string:str):
x = sys_command(f'/usr/bin/parted -s {string}')
log(f"'parted -s {string}' returned: {b''.join(x)}", level=LOG_LEVELS.Debug)
return x
def parted(self, string:str):
"""
Performs a parted execution of the given string
:param string: A raw string passed to /usr/bin/parted -s <string>
:type string: str
"""
return self.raw_parted(string).exit_code
def use_entire_disk(self, root_filesystem_type='ext4'):
log(f"Using and formatting the entire {self.blockdevice}.", level=LOG_LEVELS.Debug)
self.add_partition('primary', start='1MiB', end='513MiB', format='fat32')
self.set_name(0, 'EFI')
self.set(0, 'boot on')
# TODO: Probably redundant because in GPT mode 'esp on' is an alias for "boot on"?
# https://www.gnu.org/software/parted/manual/html_node/set.html
self.set(0, 'esp on')
self.add_partition('primary', start='513MiB', end='100%')
self.blockdevice.partition[0].filesystem = 'vfat'
self.blockdevice.partition[1].filesystem = root_filesystem_type
log(f"Set the root partition {self.blockdevice.partition[1]} to use filesystem {root_filesystem_type}.", level=LOG_LEVELS.Debug)
self.blockdevice.partition[0].target_mountpoint = '/boot'
self.blockdevice.partition[1].target_mountpoint = '/'
self.blockdevice.partition[0].allow_formatting = True
self.blockdevice.partition[1].allow_formatting = True
def add_partition(self, type, start, end, format=None):
log(f'Adding partition to {self.blockdevice}', level=LOG_LEVELS.Info)
previous_partitions = self.blockdevice.partitions
if format:
partitioning = self.parted(f'{self.blockdevice.device} mkpart {type} {format} {start} {end}') == 0
else:
partitioning = self.parted(f'{self.blockdevice.device} mkpart {type} {start} {end}') == 0
if partitioning:
start_wait = time.time()
while previous_partitions == self.blockdevice.partitions:
time.sleep(0.025) # Let the new partition come up in the kernel
if time.time() - start_wait > 10:
raise DiskError(f"New partition never showed up after adding new partition on {self} (timeout 10 seconds).")
return True
def set_name(self, partition:int, name:str):
return self.parted(f'{self.blockdevice.device} name {partition+1} "{name}"') == 0
def set(self, partition:int, string:str):
return self.parted(f'{self.blockdevice.device} set {partition+1} {string}') == 0
def device_state(name, *args, **kwargs):
# Based out of: https://askubuntu.com/questions/528690/how-to-get-list-of-all-non-removable-disk-device-names-ssd-hdd-and-sata-ide-onl/528709#528709
if os.path.isfile('/sys/block/{}/device/block/{}/removable'.format(name, name)):
with open('/sys/block/{}/device/block/{}/removable'.format(name, name)) as f:
if f.read(1) == '1':
return
path = ROOT_DIR_PATTERN.sub('', os.readlink('/sys/block/{}'.format(name)))
hotplug_buses = ("usb", "ieee1394", "mmc", "pcmcia", "firewire")
for bus in hotplug_buses:
if os.path.exists('/sys/bus/{}'.format(bus)):
for device_bus in os.listdir('/sys/bus/{}/devices'.format(bus)):
device_link = ROOT_DIR_PATTERN.sub('', os.readlink('/sys/bus/{}/devices/{}'.format(bus, device_bus)))
if re.search(device_link, path):
return
return True
# lsblk --json -l -n -o path
def all_disks(*args, **kwargs):
kwargs.setdefault("partitions", False)
drives = OrderedDict()
#for drive in json.loads(sys_command(f'losetup --json', *args, **lkwargs, hide_from_log=True)).decode('UTF_8')['loopdevices']:
for drive in json.loads(b''.join(sys_command(f'lsblk --json -l -n -o path,size,type,mountpoint,label,pkname,model', *args, **kwargs, hide_from_log=True)).decode('UTF_8'))['blockdevices']:
if not kwargs['partitions'] and drive['type'] == 'part': continue
drives[drive['path']] = BlockDevice(drive['path'], drive)
return drives
def convert_to_gigabytes(string):
unit = string.strip()[-1]
size = float(string.strip()[:-1])
if unit == 'M':
size = size/1024
elif unit == 'T':
size = size*1024
return size
def harddrive(size=None, model=None, fuzzy=False):
collection = all_disks()
for drive in collection:
if size and convert_to_gigabytes(collection[drive]['size']) != size:
continue
if model and (collection[drive]['model'] is None or collection[drive]['model'].lower() != model.lower()):
continue
return collection[drive]
def get_mount_info(path):
try:
output = b''.join(sys_command(f'/usr/bin/findmnt --json {path}'))
except SysCallError:
return {}
output = output.decode('UTF-8')
output = json.loads(output)
if 'filesystems' in output:
if len(output['filesystems']) > 1:
raise DiskError(f"Path '{path}' contains multiple mountpoints: {output['filesystems']}")
return output['filesystems'][0]
def get_partitions_in_use(mountpoint):
try:
output = b''.join(sys_command(f'/usr/bin/findmnt --json -R {mountpoint}'))
except SysCallError:
return {}
mounts = []
output = output.decode('UTF-8')
output = json.loads(output)
for target in output.get('filesystems', []):
mounts.append(Partition(target['source'], None, filesystem=target.get('fstype', None), mountpoint=target['target']))
for child in target.get('children', []):
mounts.append(Partition(child['source'], None, filesystem=child.get('fstype', None), mountpoint=child['target']))
return mounts
def get_filesystem_type(path):
try:
handle = sys_command(f"blkid -o value -s TYPE {path}")
return b''.join(handle).strip().decode('UTF-8')
except SysCallError:
return None
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