<reponame>scottwedge/OpenStack-Stein
# (c) Copyright 2014,2015 Hewlett-Packard Development Company, L.P.
#
# 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.

import ctypes
import os
import sys

from oslo_serialization import jsonutils as json


def is_windows():
    """
    :return: True if the running platform is windows
    """
    return True if sys.platform == 'win32' else False


class DisableFileSystemRedirection(object):
    """
    When a 32 bit program runs on a 64 bit operating system the paths
    to C:/Windows/System32 automatically get redirected to the 32 bit
    version (C:/Windows/SysWow64), if you really do need to access the
    contents of System32, you need to disable the file system redirector first.
    """

    def __init__(self):
        if is_windows():
            self._disable = (ctypes.windll.kernel32.
                             Wow64DisableWow64FsRedirection)
            self._revert = (ctypes.windll.kernel32.
                            Wow64RevertWow64FsRedirection)
        else:
            raise Exception("Useless if not windows")

    def __enter__(self):
        self.old_value = ctypes.c_long()
        self.success = self._disable(ctypes.byref(self.old_value))

    def __exit__(self, type, value, traceback):
        if self.success:
            self._revert(self.old_value)


def use_shadow(to_backup, windows_volume):
    """ add the shadow path to the backup directory """
    return to_backup.replace(windows_volume, '{0}freezer_shadowcopy\\'
                             .format(windows_volume))


def save_environment(home):
    """Read the environment from the terminal where the scheduler is
    initialized and save the environment variables to be reused within the
    windows service
    """
    env_path = os.path.join(home, 'env.json')
    with open(env_path, 'wb') as tmp:
        json.dump(os.environ.copy(), tmp)


def set_environment(home):
    """Read the environment variables saved by the win_daemon and restore it
    here for the windows service
    """
    json_env = os.path.join(home, 'env.json')
    with open(json_env, 'rb') as fp:
        env = json.loads(fp.read())
        for k, v in env.items():
            os.environ[str(k).strip()] = str(v).strip()

# (c) Copyright 2014,2015 Hewlett-Packard Development Company, L.P.
#
# 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.

import ctypes
import os
import sys

from oslo_serialization import jsonutils as json


def is_windows():
    """
    :return: True if the running platform is windows
    """
    return True if sys.platform == 'win32' else False


class DisableFileSystemRedirection(object):
    """
    When a 32 bit program runs on a 64 bit operating system the paths
    to C:/Windows/System32 automatically get redirected to the 32 bit
    version (C:/Windows/SysWow64), if you really do need to access the
    contents of System32, you need to disable the file system redirector first.
    """

    def __init__(self):
        if is_windows():
            self._disable = (ctypes.windll.kernel32.
                             Wow64DisableWow64FsRedirection)
            self._revert = (ctypes.windll.kernel32.
                            Wow64RevertWow64FsRedirection)
        else:
            raise Exception("Useless if not windows")

    def __enter__(self):
        self.old_value = ctypes.c_long()
        self.success = self._disable(ctypes.byref(self.old_value))

    def __exit__(self, type, value, traceback):
        if self.success:
            self._revert(self.old_value)


def use_shadow(to_backup, windows_volume):
    """ add the shadow path to the backup directory """
    return to_backup.replace(windows_volume, '{0}freezer_shadowcopy\\'
                             .format(windows_volume))


def save_environment(home):
    """Read the environment from the terminal where the scheduler is
    initialized and save the environment variables to be reused within the
    windows service
    """
    env_path = os.path.join(home, 'env.json')
    with open(env_path, 'wb') as tmp:
        json.dump(os.environ.copy(), tmp)


def set_environment(home):
    """Read the environment variables saved by the win_daemon and restore it
    here for the windows service
    """
    json_env = os.path.join(home, 'env.json')
    with open(json_env, 'rb') as fp:
        env = json.loads(fp.read())
        for k, v in env.items():
            os.environ[str(k).strip()] = str(v).strip()
# (c) Copyright 2014,2015 Hewlett-Packard Development Company, L.P. # # 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. :return: True if the running platform is windows When a 32 bit program runs on a 64 bit operating system the paths     to C:/Windows/System32 automatically get redirected to the 32 bit     version (C:/Windows/SysWow64), if you really do need to access the     contents of System32, you need to disable the file system redirector first. add the shadow path to the backup directory Read the environment from the terminal where the scheduler is     initialized and save the environment variables to be reused within the     windows service Read the environment variables saved by the win_daemon and restore it     here for the windows service