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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 __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 <string>
: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
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