4e7e8ac867
It's helpful to see what mlabel gave when it failed to get the label for a drive. Change-Id: I531c1a75debaa88aff3185fdaa03417559eec7cc
77 lines
2.4 KiB
Python
77 lines
2.4 KiB
Python
# Copyright 2015 Cloudbase Solutions Srl
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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import re
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from cloudbaseinit import exception
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from cloudbaseinit.openstack.common import log as logging
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from oslo.config import cfg
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opts = [
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cfg.StrOpt('mtools_path', default=None,
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help='Path to "mtools" program suite, used for interacting '
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'with VFAT filesystems'),
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]
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CONF = cfg.CONF
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CONF.register_opts(opts)
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CONFIG_DRIVE_LABEL = 'config-2'
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LOG = logging.getLogger(__name__)
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VOLUME_LABEL_REGEX = re.compile("Volume label is (.*?)$")
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def _check_mtools_path():
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if not CONF.mtools_path:
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raise exception.CloudbaseInitException(
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'"mtools_path" needs to be provided in order '
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'to access VFAT drives')
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def is_vfat_drive(osutils, drive_path):
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"""Check if the given drive contains a VFAT filesystem."""
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_check_mtools_path()
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mlabel = os.path.join(CONF.mtools_path, "mlabel.exe")
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args = [mlabel, "-i", drive_path, "-s"]
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out, err, exit_code = osutils.execute_process(args, shell=False)
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if exit_code:
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LOG.warning("Could not retrieve label for VFAT drive path %r",
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drive_path)
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LOG.warning("mlabel failed with error %r", err)
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return False
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out = out.decode().strip()
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match = VOLUME_LABEL_REGEX.search(out)
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return match.group(1) == CONFIG_DRIVE_LABEL
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def copy_from_vfat_drive(osutils, drive_path, target_path):
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"""Copy everything from the given VFAT drive into the given target."""
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_check_mtools_path()
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cwd = os.getcwd()
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try:
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os.chdir(target_path)
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# A mcopy call looks like this:
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#
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# mcopy -n -i \\.\PHYSICALDRIVEx ::/file/path destination/path
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mcopy = os.path.join(CONF.mtools_path, "mcopy.exe")
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args = [mcopy, "-s", "-n", "-i", drive_path, "::/", "."]
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osutils.execute_process(args, shell=False)
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finally:
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os.chdir(cwd)
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