107 lines
3.0 KiB
Python
107 lines
3.0 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 Red Hat, Inc.
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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 glob
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import logging
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import os
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import re
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logger = logging.getLogger(__name__)
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_SYS_CLASS_NET = '/sys/class/net'
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def write_config(filename, data):
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with open(filename, 'w') as f:
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f.write(str(data))
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def get_file_data(filename):
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if not os.path.exists(filename):
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return ''
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try:
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with open(filename, 'r') as f:
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return f.read()
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except IOError:
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logger.error("Error reading file: %s" % filename)
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return ''
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def interface_mac(name):
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try:
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with open('/sys/class/net/%s/address' % name, 'r') as f:
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return f.read().rstrip()
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except IOError:
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logger.error("Unable to read mac address: %s" % name)
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raise
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def _is_active_nic(interface_name):
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try:
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if interface_name == 'lo':
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return False
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device_dir = _SYS_CLASS_NET + '/%s/device' % interface_name
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has_device_dir = os.path.isdir(device_dir)
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carrier = None
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with open(_SYS_CLASS_NET + '/%s/carrier' % interface_name, 'r') as f:
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carrier = int(f.read().rstrip())
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address = None
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with open(_SYS_CLASS_NET + '/%s/address' % interface_name, 'r') as f:
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address = f.read().rstrip()
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if has_device_dir and carrier == 1 and address:
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return True
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else:
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return False
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except IOError:
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return False
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def _natural_sort_key(s):
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nsre = re.compile('([0-9]+)')
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return [int(text) if text.isdigit() else text
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for text in re.split(nsre, s)]
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def ordered_active_nics():
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embedded_nics = []
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nics = []
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for name in glob.iglob(_SYS_CLASS_NET + '/*'):
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nic = name[(len(_SYS_CLASS_NET) + 1):]
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if _is_active_nic(nic):
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if nic.startswith('em') or nic.startswith('eth') or \
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nic.startswith('eno'):
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embedded_nics.append(nic)
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else:
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nics.append(nic)
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# NOTE: we could just natural sort all active devices,
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# but this ensures em, eno, and eth are ordered first
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# (more backwards compatible)
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return (sorted(embedded_nics, key=_natural_sort_key) +
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sorted(nics, key=_natural_sort_key))
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def diff(filename, data):
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file_data = get_file_data(filename)
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logger.debug("Diff file data:\n%s" % file_data)
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logger.debug("Diff data:\n%s" % data)
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# convert to string as JSON may have unicode in it
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return not file_data == data
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