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#!/usr/bin/python3
from gi.repository import GLib
from pydbus import SystemBus
import isodumper.raw_write as raw_write
import threading
import gettext
import logging
import time
DEAMON_ORG = 'org.mageia.Magiback'
DEAMON_INTERFACE = DEAMON_ORG
ISODUMPER_INTERFACE = DEAMON_ORG + ".Isodumper"
# Keep the authorization during KEEPER (in seconds)
KEEPER = 600
auth = False
last_auth = 0
logging.basicConfig(filename="/var/log/magiback.log",
format='%(asctime)s %(levelname)-8s %(message)s',
level=logging.DEBUG)
class Isodumper(raw_write.Dumper):
"""
<node>
<interface name='org.mageia.Magiback.Isodumper'>
<method name='do_write'>
<arg type='s' name='source' direction='in'/>
<arg type='s' name='target' direction='in'/>
<arg type='x' name='size' direction='in'/>
</method>
<method name='do_format'>
<arg type='s' name='device' direction='in'/>
<arg type='s' name='format' direction='in'/>
<arg type='b' name='success' direction='out'/>
<arg type='s' name='message' direction='out'/>
</method>
<method name='check_write'>
<arg type='s' name='target' direction='in'/>
<arg type='s' name='source' direction='in'/>
</method>
<method name='do_persistence'>
<arg type='s' name='target' direction='in'/>
<arg type='s' name='label' direction='in'/>
<arg type='s' name='key' direction='in'/>
</method>
<method name='set_backup_mode'>
<arg type='x' name='uid' direction='in'/>
<arg type='x' name='gid' direction='in'/>
</method>
<method name='unset_backup_mode'>
</method>
<method name='end'>
<arg type='b' name='success' direction='out'/>
<arg type='s' name='message' direction='out'/>
</method>
<property name="done" type="b" access="read"/>
<property name="progress" type="i" access="read"/>
<property name="message" type="s" access="read"/>
<property name="state" type="b" access="read"/>
</interface>
</node>
"""
def __init__(self):
super().__init__()
APP = "isodumper"
DIR = "/usr/share/locale"
# Call translation catalog
gettext.install(APP, localedir=DIR,)
self.finished = threading.Event()
# finished is cleared at start of operation, and set at the end
self.finished.clear()
self._progress = 0
self.loop = GLib.MainLoop()
self.return_state = False
self.return_message = ""
self.authorized_sender_read = set()
self.authorized_sender_write = set()
self.sum_check = ""
self.sum_check_searched = False
self.signature_checked = False
self.writing_perm = False
self.writing_target = ""
self.backup_mode = False
self.uid = 0
self.gid = 0
self.last_auth = time.perf_counter()
def do_write(self, source, target, size, dbus_context):
self.finished.clear()
if check_permission('org.mageia.Magiback.Isodumper.write', dbus_context):
self.thread = threading.Thread(target=self._do_write, args=(source, target, size, self.backup_mode, self.uid, self.uid))
self.thread.start()
logging.info("Writing thread started")
self.writing_perm = True
self.writing_target = target
else:
self.return_message = "Writing: Access denied"
self.return_state = False
logging.debug(self.return_message)
self.finished.set()
def do_persistence(self, target, label, key):
self.finished.clear()
if self.writing_perm and self.writing_target == target:
self.thread = threading.Thread(target=self._do_persistence, args=(target, label, key))
self.thread.start()
logging.info("Persistence thread started")
else:
self.return_message = "Persistence: Access denied"
logging.info(self.return_message)
self.finished.set()
self.writing_perm = False
self.writing_target = ""
@property
def done(self):
return self.finished.wait(1)
@property
def message(self):
return self.return_message
@property
def state(self):
return self.return_state
def end(self):
if hasattr(self, 'thread'):
self.thread.join()
self._progress = 0
self.finished.clear()
return self.return_state, self.return_message
@property
def progress(self):
return self._progress
def check_write(self, target, source):
if hasattr(self, 'key_thread'):
self.key_thread.join()
self.thread = threading.Thread(target=self._check_write, args=(target, source,))
self.thread.start()
def set_backup_mode(self, uid, gid):
logging.info("Set in backup mode")
self.backup_mode = True
self.uid = uid
self.gid = gid
def unset_backup_mode(self):
logging.info("Unset the backup mode")
self.backup_mode = False
self.uid = 0
self.gid = 0
def run(self):
self.loop.run()
def check_permission(action, dbus_context):
""" Check permission
"""
global auth
global last_auth
cur = time.perf_counter()
if cur - last_auth > KEEPER or not auth:
auth = dbus_context.is_authorized(action, {'polkit.icon_name': 'isodumper.png', }, interactive=True)
if auth:
last_auth = cur
return auth
else:
return True
class ConfFile(object):
"""
<node>
<interface name='org.mageia.Magiback'>
<method name='setName'>
<arg type='s' name='a' direction='in'/>
</method>
<method name='getFile'>
<arg type='s' name='content' direction='out'/>
</method>
<method name='saveFile'>
<arg type='s' name='content' direction='in'/>
</method>
</interface>
</node>
"""
def __init__(self):
super().__init__()
def setName(self, file_name):
self.file_name = file_name
def getFile(self):
with open(self.file_name, 'r') as tcf:
# read the file
content=""
while 1:
line = tcf.readline()
if not line:
break
content += line
return content
def saveFile(self, tc, dbus_context):
if check_permission('org.mageia.Magiback.write', dbus_context):
try:
with open(self.file_name, 'w') as tcf:
tcf.write(tc)
except:
return False
return True
if __name__ == '__main__':
print("Running Magiback service.")
bus = SystemBus()
conf_file = ConfFile()
bus.publish(DEAMON_ORG, conf_file, ("Isodumper", Isodumper()))
loop = GLib.MainLoop()
loop.run()
logging.shutdown()
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