0540d6ddb9
The attribute disk_start_sector allows to specify a custom start sector for the first partition of the disk. On GPT tables everything works nicely, on DOS tables the used tools fdisk/sfdisk are not able to manage the start/end values of subsequent partitions if the first partition doesn't start with the tooling default. This patch allows to set the start sector after the partition table has been created
106 lines
2.8 KiB
Python
106 lines
2.8 KiB
Python
# Copyright (c) 2015 SUSE Linux GmbH. All rights reserved.
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#
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# This file is part of kiwi.
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#
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# kiwi is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# kiwi is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with kiwi. If not, see <http://www.gnu.org/licenses/>
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#
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import os
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import re
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# project
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from kiwi.command import Command
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class BlockID:
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"""
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**Get information from a block device**
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:param str device:
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block device node name name. The device can
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also be specified as UUID=<uuid>
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"""
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def __init__(self, device):
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uuid_format = re.match(r'^UUID=(.*)', device)
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if uuid_format:
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blkid_result = Command.run(
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['blkid', '--uuid', uuid_format.group(1)]
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)
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self.device = blkid_result.output.strip(os.linesep)
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else:
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self.device = device
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def get_label(self):
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"""
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Retrieve filesystem label from block device
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:return: block device label
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:rtype: str
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"""
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return self.get_blkid('LABEL')
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def get_uuid(self):
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"""
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Retrieve filesystem uuid from block device
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:return: uuid for the filesystem of the block device
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:rtype: str
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"""
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return self.get_blkid('UUID')
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def get_filesystem(self):
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"""
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Retrieve filesystem type from block device
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:return: filesystem type
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:rtype: str
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"""
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return self.get_blkid('TYPE')
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def get_partition_count(self) -> int:
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"""
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Retrieve number of partitions from block device
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:return: A number
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:rtype: int
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"""
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partition_count = 0
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lsblk_result = Command.run(
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['lsblk', '-r', '-o', 'NAME,TYPE', self.device]
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)
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for line in lsblk_result.output.strip().split(os.linesep):
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if line.strip().endswith('part'):
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partition_count += 1
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return partition_count
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def get_blkid(self, id_type):
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"""
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Retrieve information for specified metadata ID from block device
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:param string id_type: metadata ID, see man blkid for details
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:return: ID of the block device
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:rtype: str
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"""
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blkid_result = Command.run(
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['blkid', self.device, '-s', id_type, '-o', 'value'],
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raise_on_error=False
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)
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return blkid_result.output.strip(os.linesep) if blkid_result else ''
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