487168ac58
Do not raise of blkid is not able to read the requested ID. It is expected that the methods of the BlockID class either returns a value or none but do not raise and cause the complete process to terminate
89 lines
2.3 KiB
Python
89 lines
2.3 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_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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