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#
# desktop.py - install data for default desktop and run level
#
# Copyright (C) 2001, 2002  Red Hat, Inc.  All rights reserved.
#
# 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, see <http://www.gnu.org/licenses/>.
#
# Author(s): Matt Wilson <msw@redhat.com>
#

import string, os
from simpleconfig import SimpleConfigFile
from pyanaconda.constants import ROOT_PATH

import logging
log = logging.getLogger("anaconda")

class Desktop (SimpleConfigFile):
#
# This class represents the default desktop to run and the default runlevel
# to start in
#
    def setDefaultRunLevel(self, runlevel):
        if str(runlevel) != "3" and str(runlevel) != "5":
            raise RuntimeError, "Desktop::setDefaultRunLevel() - Must specify runlevel as 3 or 5!"
        self.runlevel = runlevel

    def getDefaultRunLevel(self):
        return self.runlevel

    def setDefaultDesktop(self, desktop):
        self.info["DESKTOP"] = desktop

    def getDefaultDesktop(self):
        return self.get("DESKTOP")

    def __init__ (self):
        SimpleConfigFile.__init__ (self)
        self.runlevel = 3

    def write(self):
        if self.getDefaultDesktop():
            f = open(ROOT_PATH + "/etc/sysconfig/desktop", "w")
            f.write(str (self))
            f.close()

        try:
            inittab = open (ROOT_PATH + '/etc/inittab', 'r')
        except IOError:
            log.warning ("there is no inittab, bad things will happen!")
            return
        lines = inittab.readlines ()
        inittab.close ()
        inittab = open (ROOT_PATH + '/etc/inittab', 'w')        
        for line in lines:
            if len (line) > 3 and line[:3] == "id:":
                fields = string.split (line, ':')
                fields[1] = str (self.runlevel)
                line = string.join (fields, ':')
            inittab.write (line)
        inittab.close ()

        if not os.path.isdir(ROOT_PATH + '/etc/systemd/system'):
            log.warning("there is no /etc/systemd/system directory, cannot update default.target!")
            return
        default_target = ROOT_PATH + '/etc/systemd/system/default.target'
        if os.path.islink(default_target):
            os.unlink(default_target)
        os.symlink('/lib/systemd/system/runlevel' + str(self.runlevel) + '.target', default_target)