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import re
import os
import json
import logging
import pathlib
from typing import Union
from .blockdevice import BlockDevice
from ..exceptions import SysCallError, DiskError
from ..general import SysCommand
from ..output import log
ROOT_DIR_PATTERN = re.compile('^.*?/devices')
GIGA = 2 ** 30
def convert_size_to_gb(size):
return round(size / GIGA,1)
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 for device path {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:
raise DiskError(f"Could not get mount information for device path {path}")
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:
if (handle := SysCommand("lsblk -f -o+TYPE,SIZE -J")).exit_code == 0:
return json.loads(handle.decode('UTF-8'))
else:
log(f"Could not return disk layouts: {handle}", level=logging.WARNING, fg="yellow")
return None
except SysCallError as err:
log(f"Could not return disk layouts: {err}", level=logging.WARNING, fg="yellow")
return None
except json.decoder.JSONDecodeError as err:
log(f"Could not return disk layouts: {err}", level=logging.WARNING, fg="yellow")
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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