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#!/usr/bin/env python
#
# PivotChroot.py: this file is part of the GRS suite
# Copyright (C) 2015 Anthony G. Basile
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
import glob
import re
import os
import shutil
from grs.Constants import CONST
from grs.MountDirectories import MountDirectories
from grs.Rotator import Rotator
class PivotChroot(Rotator):
""" Move an inner chroot out to the new system portage configroot. """
def __init__(self, tmpdir = CONST.TMPDIR, portage_configroot = CONST.PORTAGE_CONFIGROOT, \
logfile = CONST.LOGFILE):
self.tmpdir = tmpdir
self.portage_configroot = portage_configroot
self.logfile = logfile
def pivot(self, subchroot, md):
# If any directories are mounted, unmount them before pivoting.
some_mounted, all_mounted = md.are_mounted()
if some_mounted:
md.umount_all()
# Move the system's portage configroot out of the way to system.0,
# then pivot the inner chroot to system.
self.full_rotate(self.portage_configroot)
inner_chroot = os.path.join('%s.0' % self.portage_configroot, subchroot)
shutil.move(inner_chroot, os.path.join(self.tmpdir, 'system'))
# Be conservative: only if all the directories were mounted on the old
# system portage configroot to we remount on the newly pivoted root.
if all_mounted:
md.mount_all()
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