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# Copyright (C) 2015-2016 Lars Wirzenius
#
# 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 logging
import obnamlib
class OneFileSystemPlugin(obnamlib.ObnamPlugin):
def enable(self):
backup_group = obnamlib.option_group['backup'] = 'Backing up'
self.app.settings.boolean(
['one-file-system'],
'exclude directories (and their subdirs) '
'that are in a different filesystem',
group=backup_group)
self.app.hooks.add_callback('config-loaded', self.config_loaded)
def config_loaded(self):
if self.app.settings['one-file-system']:
self.load_mount_points()
self.app.hooks.add_callback('backup-exclude', self.exclude)
def load_mount_points(self):
self.mount_points = []
try:
with open('/proc/mounts', 'r') as f:
self.mount_points = self.parse_proc_mounts(f)
except EnvironmentError:
pass
def parse_proc_mounts(self, f):
return [
line.split()[1]
for line in f
]
def exclude(self, **kwargs):
st = kwargs['stat_result']
root_metadata = kwargs['root_metadata']
pathname = kwargs['pathname']
exclude = kwargs['exclude']
# FIXME: We should check for mount points (bind mounts) here.
# We used to do that but it broke other things, and as the
# Debian stretch release freezing is going on, backing out of
# the bind mount checking is a safer bet than trying to fix
# it. Needs to be fixed later. I suck. --liw
if st.st_dev != root_metadata.st_dev:
logging.debug('Excluding (one-file-system): %s', pathname)
exclude[0] = True
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