/usr/share/pyshared/jockey/kerneldetection.py is in jockey-common 0.9.7-0ubuntu7.16.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# kerneldetection.py
#
# Copyright 2013 Canonical Ltd.
#
# Author: Alberto Milone <alberto.milone@canonical.com>
#
# This program 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 2 of the License, or
# (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
import apt
import logging
import re
from subprocess import Popen
class KernelDetection(object):
def __init__(self, cache=None):
if cache:
self.apt_cache = cache
else:
self.apt_cache = apt.Cache()
def _is_greater_than(self, term1, term2):
# We don't want to take into account
# the flavour
pattern = re.compile('(.+)-([0-9]+)-(.+)')
match1 = pattern.match(term1)
match2 = pattern.match(term2)
if match1:
term1 = '%s-%s' % (match1.group(1),
match1.group(2))
term2 = '%s-%s' % (match2.group(1),
match2.group(2))
logging.debug('Comparing %s with %s' % (term1, term2))
command = 'dpkg --compare-versions %s gt %s' % \
(term1, term2)
process = Popen(command.split(' '))
process.communicate()
return not process.returncode
def _get_linux_metapackage(self, headers):
'''Get the linux headers or linux metapackage'''
suffix = headers and '-headers' or ''
pattern = re.compile('linux-image-(.+)-([0-9]+)-(.+)')
source_pattern = re.compile('linux-(.+)')
metapackage = ''
version = ''
for pkg in self.apt_cache:
if ('linux-image' in pkg.name and
'extra' not in pkg.name and
self.apt_cache[pkg.name].is_installed or
self.apt_cache[pkg.name].marked_install):
match = pattern.match(pkg.name)
# Here we filter out packages such as
# linux-generic-lts-quantal
if match:
current_version = '%s-%s' % (match.group(1),
match.group(2))
# See if the current version is greater than
# the greatest that we've found so far
if self._is_greater_than(current_version,
version):
try:
source = self.apt_cache[pkg.name].\
candidate.record['Source']
except KeyError:
# Sometimes the Source key is not
# available, see LP: #1123107
continue
version = current_version
match_source = source_pattern.match(source)
# Set the linux-headers metapackage
if '-lts-' in source and match_source:
# This is the case of packages such as
# linux-image-3.5.0-18-generic which
# comes from linux-lts-quantal.
# Therefore the linux-headers-generic
# metapackage would be wrong here and
# we should use
# linux-headers-generic-lts-quantal
# instead
metapackage = 'linux%s-%s-%s' % (
suffix,
match.group(3),
match_source.group(1))
else:
# The scheme linux-headers-$flavour works
# well here
metapackage = 'linux%s-%s' % (
suffix,
match.group(3))
return metapackage
def get_linux_headers_metapackage(self):
'''Get the linux headers for the newest_kernel installed'''
return self._get_linux_metapackage(True)
def get_linux_metapackage(self):
'''Get the linux metapackage for the newest_kernel installed'''
return self._get_linux_metapackage(False)
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