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# Copyright (c) 2015 SUSE Linux GmbH. All rights reserved.
#
# This file is part of kiwi.
#
# kiwi is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# kiwi is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty 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 kiwi. If not, see <http://www.gnu.org/licenses/>
#
import os
import re
# project
from kiwi.command import Command
class BlockID:
"""
**Get information from a block device**
:param str device:
block device node name name. The device can
also be specified as UUID=<uuid>
"""
def __init__(self, device):
uuid_format = re.match(r'^UUID=(.*)', device)
if uuid_format:
blkid_result = Command.run(
['blkid', '--uuid', uuid_format.group(1)]
)
self.device = blkid_result.output.strip(os.linesep)
else:
self.device = device
def get_label(self):
"""
Retrieve filesystem label from block device
:return: block device label
:rtype: str
"""
return self.get_blkid('LABEL')
def get_uuid(self):
"""
Retrieve filesystem uuid from block device
:return: uuid for the filesystem of the block device
:rtype: str
"""
return self.get_blkid('UUID')
def get_filesystem(self):
"""
Retrieve filesystem type from block device
:return: filesystem type
:rtype: str
"""
return self.get_blkid('TYPE')
def get_partition_count(self) -> int:
"""
Retrieve number of partitions from block device
:return: A number
:rtype: int
"""
partition_count = 0
lsblk_result = Command.run(
['lsblk', '-r', '-o', 'NAME,TYPE', self.device]
)
for line in lsblk_result.output.strip().split(os.linesep):
if line.strip().endswith('part'):
partition_count += 1
return partition_count
def get_blkid(self, id_type):
"""
Retrieve information for specified metadata ID from block device
:param string id_type: metadata ID, see man blkid for details
:return: ID of the block device
:rtype: str
"""
blkid_result = Command.run(
['blkid', self.device, '-s', id_type, '-o', 'value'],
raise_on_error=False
)
return blkid_result.output.strip(os.linesep) if blkid_result else ''
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