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# -*- coding: utf-8 -*-
# polkit_agent.py
# Copyright (C) 2013 LEAP
#
# 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/>.
"""
Daemonizes polkit authentication agent.
"""
import logging
import os
import subprocess
import daemon
# TODO --- logger won't work when daemoninzed. Log to syslog instead?
logger = logging.getLogger(__name__)
POLKIT_PATHS = (
'/usr/lib/lxpolkit/lxpolkit',
'/usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1',
'/usr/lib/mate-polkit/polkit-mate-authentication-agent-1',
'/usr/lib/kde4/libexec/polkit-kde-authentication-agent-1',
)
# TODO write tests for this piece.
def _get_polkit_agent():
"""
Return a valid polkit agent to use.
:rtype: str or None
"""
# TODO: in caso of having more than one polkit agent we may want to
# stablish priorities. E.g.: lxpolkit over gnome-polkit for minimalistic
# desktops.
for polkit in POLKIT_PATHS:
if os.path.isfile(polkit):
return polkit
return None
def _launch_agent():
"""
Launch a polkit authentication agent on a subprocess.
"""
polkit_agent = _get_polkit_agent()
if polkit_agent is None:
logger.error("No usable polkit was found.")
return
logger.debug('Launching polkit auth agent')
try:
# XXX fix KDE launch. See: #3755
subprocess.call(polkit_agent)
except Exception as e:
logger.error('Error launching polkit authentication agent %r' % (e, ))
def launch():
"""
Launch a polkit authentication agent as a daemon.
"""
with daemon.DaemonContext():
_launch_agent()
if __name__ == "__main__":
# TODO pass a --nodaemon flag so that we can launch this in the foreground
# and debug this module, getting errors to stderr.
launch()
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