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# Copyright 2013 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Base class for Linux platform specific information."""
import os
import platform
import stat
from gcimagebundlelib import exclude_spec
from gcimagebundlelib import os_platform
class LinuxPlatform(os_platform.Platform):
"""Base class for all Linux flavors."""
EXCLUDE_LIST = [
exclude_spec.ExcludeSpec('/etc/ssh/.host_key_regenerated'),
exclude_spec.ExcludeSpec('/dev', preserve_dir=True),
exclude_spec.ExcludeSpec('/proc', preserve_dir=True),
exclude_spec.ExcludeSpec('/run',
preserve_dir=True, preserve_subdir=True),
exclude_spec.ExcludeSpec('/selinux'),
exclude_spec.ExcludeSpec('/tmp', preserve_dir=True),
exclude_spec.ExcludeSpec('/sys', preserve_dir=True),
exclude_spec.ExcludeSpec('/var/lib/google/per-instance',
preserve_dir=True),
exclude_spec.ExcludeSpec('/var/lock',
preserve_dir=True, preserve_subdir=True),
exclude_spec.ExcludeSpec('/var/log',
preserve_dir=True, preserve_subdir=True),
exclude_spec.ExcludeSpec('/var/run',
preserve_dir=True, preserve_subdir=True)]
def __init__(self):
"""Populate the uname -a information."""
super(LinuxPlatform, self).__init__()
(self.name, self.hostname, self.release, self.version, self.architecture,
self.processor) = platform.uname()
(self.distribution, self.distribution_version,
self.distribution_codename) = platform.dist()
def GetPlatformDetails(self):
return ' '.join([self.name, self.hostname, self.release, self.version,
self.architecture, self.processor, self.distribution,
self.distribution_version, self.distribution_codename])
def GetName(self):
return self.GetOs()
def GetProcessor(self):
return platform.processor()
def GetArchitecture(self):
if self.architecture:
return self.architecture
return ''
def GetOs(self):
if self.distribution:
if self.distribution_codename:
return '%s (%s)' % (self.distribution, self.distribution_codename)
else:
return self.distribution
if self.name:
return self.name
return 'Linux'
def IsLinux(self):
return True
# Linux specific methods
def GetKernelVersion(self):
return self.release
# distribution specific methods
# if platforms module does not do a good job override these.
def GetDistribution(self):
return self.distribution
def GetDistributionCodeName(self):
return self.distribution_codename
def GetDistributionVersion(self):
return self.distribution_version
def GetPlatformSpecialFiles(self, tmpdir='/tmp'):
"""Creates any platform specific special files."""
retval = []
console_dev = os.makedev(5, 1)
os.mknod(tmpdir + 'console', stat.S_IFCHR |
stat.S_IRUSR | stat.S_IWUSR, console_dev)
retval.append((tmpdir + 'console', 'dev/console'))
null_dev = os.makedev(1, 3)
os.mknod(tmpdir + 'null', stat.S_IFCHR |
stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IWGRP |
stat.S_IROTH | stat.S_IWOTH, null_dev)
retval.append((tmpdir + 'null', 'dev/null'))
tty_dev = os.makedev(5, 0)
os.mknod(tmpdir + 'tty', stat.S_IFCHR |
stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IWGRP |
stat.S_IROTH | stat.S_IWOTH, tty_dev)
retval.append((tmpdir + 'tty', 'dev/tty'))
zero_dev = os.makedev(1, 5)
os.mknod(tmpdir + 'zero', stat.S_IFCHR |
stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IWGRP |
stat.S_IROTH | stat.S_IWOTH, zero_dev)
retval.append((tmpdir + 'zero', 'dev/zero'))
# /selinux is deprecated in favor of /sys/fs/selinux, but preserve it on
# those OSes where it's present.
if os.path.isdir('/selinux'):
os.mkdir(tmpdir + 'selinux', 0755)
retval.append((tmpdir + 'selinux', 'selinux'))
return retval
def Overwrite(self, filename, arcname, tmpdir='/tmp'):
"""Overwrites specified file if needed for the Linux platform."""
pass
def GetPreferredFilesystemType(self):
"""Return the optimal filesystem supported for the platform."""
return 'ext4'
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