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import re
import json
import logging
import pathlib
from typing import Union
from .blockdevice import BlockDevice
from ..exceptions import SysCallError
from ..general import SysCommand
from ..output import log
ROOT_DIR_PATTERN = re.compile('^.*?/devices')
def sort_block_devices_based_on_performance(block_devices):
result = {device: 0 for device in block_devices}
for device, weight in result.items():
if device.spinning:
weight -= 10
else:
weight += 5
if device.bus_type == 'nvme':
weight += 20
elif device.bus_type == 'sata':
weight += 10
result[device] = weight
return result
def filter_disks_below_size_in_gb(devices, gigabytes):
for disk in devices:
if disk.size >= gigabytes:
yield disk
def select_largest_device(devices, gigabytes, filter_out=None):
if not filter_out:
filter_out = []
copy_devices = [*devices]
for filter_device in filter_out:
if filter_device in copy_devices:
copy_devices.pop(copy_devices.index(filter_device))
copy_devices = list(filter_disks_below_size_in_gb(copy_devices, gigabytes))
if not len(copy_devices):
return None
return max(copy_devices, key=(lambda device : device.size))
def select_disk_larger_than_or_close_to(devices, gigabytes, filter_out=None):
if not filter_out:
filter_out = []
copy_devices = [*devices]
for filter_device in filter_out:
if filter_device in copy_devices:
copy_devices.pop(copy_devices.index(filter_device))
if not len(copy_devices):
return None
return min(copy_devices, key=(lambda device : abs(device.size - gigabytes)))
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 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 = {}
lsblk = json.loads(SysCommand('lsblk --json -l -n -o path,size,type,mountpoint,label,pkname,model').decode('UTF_8'))
for drive in lsblk['blockdevices']:
if not kwargs['partitions'] and drive['type'] == 'part':
continue
drives[drive['path']] = BlockDevice(drive['path'], drive)
return drives
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 :Union[pathlib.Path, str], traverse=False, return_real_path=False) -> dict:
for traversal in list(map(str, [str(path)] + list(pathlib.Path(str(path)).parents))):
try:
log(f"Getting mount information at location {traversal}", level=logging.INFO)
output = SysCommand(f'/usr/bin/findmnt --json {traversal}').decode('UTF-8')
if output:
break
except SysCallError:
pass
if not traverse:
break
if not output:
if return_real_path:
return {}, None
else:
return {}
output = json.loads(output)
if 'filesystems' in output:
if len(output['filesystems']) > 1:
raise DiskError(f"Path '{path}' contains multiple mountpoints: {output['filesystems']}")
if return_real_path:
return output['filesystems'][0], traversal
else:
return output['filesystems'][0]
if return_real_path:
return {}, traversal
else:
return {}
def get_partitions_in_use(mountpoint) -> list:
from .partition import Partition
try:
output = SysCommand(f"/usr/bin/findmnt --json -R {mountpoint}").decode('UTF-8')
except SysCallError:
return []
mounts = []
if not output:
return []
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:
return SysCommand(f"blkid -o value -s TYPE {path}").decode('UTF-8').strip()
except SysCallError:
return None
def disk_layouts():
try:
return json.loads(SysCommand("lsblk -f -o+TYPE,SIZE -J").decode('UTF-8'))
except SysCallError as err:
log(f"Could not return disk layouts: {err}")
return None
def encrypted_partitions(blockdevices :dict) -> bool:
for partition in blockdevices.values():
if partition.get('encrypted', False):
yield partition
def find_partition_by_mountpoint(block_devices, relative_mountpoint :str):
for device in block_devices:
for partition in block_devices[device]['partitions']:
if partition.get('mountpoint', None) == relative_mountpoint:
return partition
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