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# -*- coding: utf-8; Mode: Python; indent-tabs-mode: nil; tab-width: 4 -*-
# Copyright (C) 2005, 2006, 2007, 2008 Canonical Ltd.
# Written by Colin Watson <cjwatson@ubuntu.com>.
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import fcntl
import subprocess
import debconf
from ubiquity import misc
class DebconfCommunicator(debconf.Debconf):
def __init__(self, owner, title=None, cloexec=False, env=None):
self.dccomm = subprocess.Popen(
['debconf-communicate', '-fnoninteractive', owner],
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
close_fds=True, env=env, preexec_fn=misc.regain_privileges,
universal_newlines=True)
debconf.Debconf.__init__(self, title=title,
read=self.dccomm.stdout,
write=self.dccomm.stdin)
if cloexec:
fcntl.fcntl(self.read.fileno(), fcntl.F_SETFD, fcntl.FD_CLOEXEC)
fcntl.fcntl(self.write.fileno(), fcntl.F_SETFD, fcntl.FD_CLOEXEC)
def shutdown(self):
if self.dccomm is not None:
self.dccomm.stdout.close()
self.dccomm.stdin.close()
self.dccomm.wait()
self.dccomm = None
def __del__(self):
self.shutdown()
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