/usr/lib/python3/dist-packages/parted/partition.py is in python3-parted 3.10.0-1.1.
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# partition.py
# Python bindings for libparted (built on top of the _ped Python module).
#
# Copyright (C) 2009-2013 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details. You should have received a copy of the
# GNU General Public License along with this program; if not, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#
# Author(s): Chris Lumens <clumens@redhat.com>
# David Cantrell <dcantrell@redhat.com>
# Alex Skinner <alex@lx.lc>
#
import math
import warnings
import _ped
import parted
from parted.decorators import localeC
# XXX: add docstrings
class Partition(object):
# pylint: disable=W0622
@localeC
def __init__(self, disk=None, type=None, fs=None, geometry=None, PedPartition=None):
if PedPartition is None:
if disk is None:
raise parted.PartitionException("no disk specified")
elif type is None:
raise parted.PartitionException("no type specified")
elif geometry is None:
raise parted.PartitionException("no geometry specified")
self._fileSystem = fs
self._geometry = geometry
self._disk = disk
if fs is None:
self.__partition = _ped.Partition(disk.getPedDisk(), type, geometry.start, geometry.end)
else:
self.__partition = _ped.Partition(disk.getPedDisk(), type, geometry.start, geometry.end, parted.fileSystemType[fs.type])
else:
self.__partition = PedPartition
self._geometry = parted.Geometry(PedGeometry=self.__partition.geom)
if disk is None:
self._disk = parted.Disk(PedDisk=self.__partition.disk)
else:
self._disk = disk
if self.__partition.fs_type is None:
self._fileSystem = None
else:
# pylint: disable=E1103
self._fileSystem = parted.FileSystem(type=self.__partition.fs_type.name, geometry=self._geometry)
def __eq__(self, other):
return not self.__ne__(other)
def __ne__(self, other):
if hash(self) == hash(other):
return False
if type(self) != type(other):
return True
return self.path != other.path or self.type != other.type or self.geometry != other.geometry or self.fileSystem != other.fileSystem
def __str__(self):
try:
name = self.name
except parted.PartitionException:
name = None
s = ("parted.Partition instance --\n"
" disk: %(disk)r fileSystem: %(fileSystem)r\n"
" number: %(number)s path: %(path)s type: %(type)s\n"
" name: %(name)s active: %(active)s busy: %(busy)s\n"
" geometry: %(geometry)r PedPartition: %(ped)r" %
{"disk": self.disk, "fileSystem": self.fileSystem, "geometry": self.geometry,
"number": self.number, "path": self.path,
"type": self.type, "name": name, "active": self.active,
"busy": self.busy, "ped": self.__partition})
return s
def __writeOnly(self, prop):
raise parted.WriteOnlyProperty(prop)
@property
@localeC
def active(self):
"""True if the partition is active, False otherwise."""
return bool(self.__partition.is_active())
@property
@localeC
def busy(self):
"""True if the partition is active, False otherwise."""
return bool(self.__partition.is_busy())
@property
def disk(self):
"""The Disk this partition belongs to."""
return self._disk
@property
@localeC
def path(self):
"""The filesystem path to this partition's device node."""
return self.__partition.get_path()
@property
@localeC
def name(self):
"""The name of this partition."""
try:
return self.__partition.get_name()
except parted.PartitionException:
return None
@property
def number(self):
"""The partition number."""
return self.__partition.num
fileSystem = property(lambda s: s._fileSystem, lambda s, v: setattr(s, "_fileSystem", v))
geometry = property(lambda s: s._geometry, lambda s, v: setattr(s, "_geometry", v))
system = property(lambda s: s.__writeOnly("system"), lambda s, v: s.__partition.set_system(v))
type = property(lambda s: s.__partition.type, lambda s, v: setattr(s.__partition, "type", v))
@localeC
def getFlag(self, flag):
"""Get the value of a particular flag on the partition. Valid flags
are the _ped.PARTITION_* constants. See _ped.flag_get_name() and
_ped.flag_get_by_name() for more help working with partition flags.
"""
return self.__partition.get_flag(flag)
@localeC
def setFlag(self, flag):
"""Set the flag on a partition to the provided value. On error, a
PartitionException will be raised. See getFlag() for more help on
working with partition flags."""
return self.__partition.set_flag(flag, 1)
@localeC
def unsetFlag(self, flag):
"""Unset the flag on this Partition. On error, a PartitionException
will be raised. See getFlag() for more help on working with
partition flags."""
return self.__partition.set_flag(flag, 0)
@localeC
def getMaxGeometry(self, constraint):
"""Given a constraint, return the maximum Geometry that self can be
grown to. Raises Partitionexception on error."""
return parted.Geometry(PedGeometry=self.disk.getPedDisk().get_max_partition_geometry(self.__partition, constraint.getPedConstraint()))
@localeC
def isFlagAvailable(self, flag):
"""Return True if flag is available on this Partition, False
otherwise."""
return self.__partition.is_flag_available(flag)
@localeC
def nextPartition(self):
"""Return the Partition following this one on the Disk."""
partition = self.disk.getPedDisk().next_partition(self.__partition)
if partition is None:
return None
else:
return parted.Partition(disk=self.disk, PedPartition=partition)
@localeC
def getSize(self, unit="MB"):
"""Return the size of the partition in the unit specified. The unit
is given as a string corresponding to one of the following
abbreviations: b (bytes), KB (kilobytes), MB (megabytes), GB
(gigabytes), TB (terabytes). An invalid unit string will raise a
SyntaxError exception. The default unit is MB."""
warnings.warn("use the getLength method", DeprecationWarning)
return self.geometry.getSize(unit)
@localeC
def getLength(self, unit='sectors'):
"""Return the length of the partition in sectors. Optionally, a SI or
IEC prefix followed by a 'B' may be given in order to convert the
length into bytes. The allowed values include B, kB, MB, GB, TB, KiB,
MiB, GiB, and TiB."""
return self.geometry.getLength(unit)
def getFlagsAsString(self):
"""Return a comma-separated string representing the flags
on this partition."""
flags = []
for flag in partitionFlag.keys():
if self.getFlag(flag):
flags.append(partitionFlag[flag])
return ', '.join(flags)
def getMaxAvailableSize(self, unit="MB"):
"""Return the maximum size this Partition can grow to by looking
at contiguous freespace partitions. The size is returned in
the unit specified (default is megabytes). The unit is a
string corresponding to one of the following abbreviations:
b (bytes), KB (kilobytes), MB (megabytes), GB (gigabytes),
TB (terabytes). An invalid unit string will raise a
SyntaxError exception."""
lunit = unit.lower()
if lunit not in parted._exponent.keys():
raise SyntaxError("invalid unit %s given" % (unit))
maxLength = self.geometry.length
sectorSize = self.geometry.device.sectorSize
for partition in self.disk.partitions:
if partition.type & parted.PARTITION_FREESPACE:
maxLength += partition.geometry.length
else:
break
return math.floor(maxLength * math.pow(sectorSize, parted._exponent[lunit]))
def getDeviceNodeName(self):
"""Return the device name for this Partition."""
return self.path[5:]
def getPedPartition(self):
"""Return the _ped.Partition object contained in this Partition.
For internal module use only."""
return self.__partition
# collect all partition flags and store them in a hash
partitionFlag = {}
__flag = _ped.partition_flag_next(0)
partitionFlag[__flag] = _ped.partition_flag_get_name(__flag)
__readFlags = True
while __readFlags:
__flag = _ped.partition_flag_next(__flag)
if not __flag:
__readFlags = False
else:
partitionFlag[__flag] = _ped.partition_flag_get_name(__flag)
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