import glob, re, os, json from collections import OrderedDict from .exceptions import * from .general import * ROOT_DIR_PATTERN = re.compile('^.*?/devices') GPT = 0b00000001 #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): self.path = path self.info = info self.part_cache = OrderedDict() def __repr__(self, *args, **kwargs): return f"BlockDevice({self.device})" def __getitem__(self, key, *args, **kwargs): if not key 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 '' } 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 not 'type' 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'] == 'crypt': if not 'pkname' in self.info: raise DiskError(f'A crypt device ({self.path}) without a parent kernel device name.') return f"/dev/{self.info['pkname']}" # 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? self.part_cache[part_id] = Partition(root_path + part_id, 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] class Partition(): def __init__(self, path, part_id=None, size=-1, filesystem=None, mountpoint=None, encrypted=False): if not part_id: part_id = os.path.basename(path) self.path = path self.part_id = part_id self.mountpoint = mountpoint self.filesystem = filesystem # TODO: Autodetect if we're reusing a partition self.size = size # TODO: Refresh? self.encrypted = encrypted def __repr__(self, *args, **kwargs): if self.encrypted: return f'Partition(path={self.path}, real_device={self.real_device}, fs={self.filesystem}, mounted={self.mountpoint})' else: return f'Partition(path={self.path}, fs={self.filesystem}, mounted={self.mountpoint})' def format(self, filesystem): log(f'Formatting {self} -> {filesystem}') if filesystem == 'btrfs': o = b''.join(sys_command(f'/usr/bin/mkfs.btrfs -f {self.path}')) if not b'UUID' in o: raise DiskError(f'Could not format {self.path} with {filesystem} because: {o}') self.filesystem = 'btrfs' elif filesystem == 'fat32': o = b''.join(sys_command(f'/usr/bin/mkfs.vfat -F32 {self.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 {self.path} with {filesystem} because: {o}') self.filesystem = 'fat32' elif filesystem == 'ext4': if (handle := sys_command(f'/usr/bin/mkfs.ext4 -F {self.path}')).exit_code != 0: raise DiskError(f'Could not format {self.path} with {filesystem} because: {b"".join(handle)}') self.filesystem = 'fat32' else: raise DiskError(f'Fileformat {filesystem} is not yet implemented.') 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 @property def real_device(self): if not self.encrypted: return self.path else: 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}') def mount(self, target, fs=None, options=''): if not self.mountpoint: log(f'Mounting {self} to {target}') if not fs: if not self.filesystem: raise DiskError(f'Need to format (or define) the filesystem on {self} before mounting.') fs = self.filesystem ## libc has some issues with loop devices, defaulting back to sys calls # ret = libc.mount(self.path.encode(), target.encode(), fs.encode(), 0, options.encode()) # if ret < 0: # errno = ctypes.get_errno() # raise OSError(errno, f"Error mounting {self.path} ({fs}) on {target} with options '{options}': {os.strerror(errno)}") if sys_command(f'/usr/bin/mount {self.path} {target}').exit_code == 0: self.mountpoint = target 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.mode == GPT: if sys_command(f'/usr/bin/parted -s {self.blockdevice.device} mklabel gpt',).exit_code == 0: 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}') 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 raw_parted(self, string:str): x = sys_command(f'/usr/bin/parted -s {string}') o = b''.join(x) 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 :type string: str """ return self.raw_parted(string).exit_code def use_entire_disk(self, prep_mode=None): self.add_partition('primary', start='1MiB', end='513MiB', format='fat32') self.set_name(0, 'EFI') self.set(0, 'boot on') self.set(0, 'esp on') # TODO: Redundant, as in GPT mode it's an alias for "boot on"? https://www.gnu.org/software/parted/manual/html_node/set.html if prep_mode == 'luks2': self.add_partition('primary', start='513MiB', end='100%') else: self.add_partition('primary', start='513MiB', end='100%', format='ext4') def add_partition(self, type, start, end, format=None): log(f'Adding partition to {self.blockdevice}') if format: return self.parted(f'{self.blockdevice.device} mkpart {type} {format} {start} {end}') == 0 else: return self.parted(f'{self.blockdevice.device} mkpart {type} {start} {end}') == 0 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): if not 'partitions' in kwargs: kwargs['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', *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