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# Gufw 19.10.0 - http://gufw.org
# Copyright (C) 2008-2019 Marcos Alvarez Costales https://launchpad.net/~costales
#
# Gufw 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.
#
# Gufw 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 Gufw; if not, see http://www.gnu.org/licenses for more
# information.
import os, sys
from stat import *
class Instance:
def __init__(self):
self.pid_file = '/tmp/gufw.pid'
self._check_is_root()
self._check_etc_writable()
self._check_instance()
self._start_application()
def _check_is_root(self):
if os.geteuid() != 0:
from gi.repository import Gtk
dialog = Gtk.MessageDialog(None, 0, Gtk.MessageType.INFO, Gtk.ButtonsType.OK, "Run as superuser")
dialog.format_secondary_text("Just run this command in the shell: gufw or sudo gufw")
dialog.run()
dialog.destroy()
exit(0)
def _check_etc_writable(self):
if bin(os.stat("/etc")[ST_MODE])[-5] == '0' and bin(os.stat("/etc")[ST_MODE])[-2] == '0': # get chmod /etc
return
from gi.repository import Gtk
import gettext
from gettext import gettext as _
gettext.textdomain('gufw')
dialog = Gtk.MessageDialog(None, 0, Gtk.MessageType.INFO, Gtk.ButtonsType.OK, _("Error: /etc is writable"))
dialog.format_secondary_text(_("Your /etc directory is writable.\nFix it running from Terminal:") + "\n\nsudo chmod 755 /etc")
dialog.run()
dialog.destroy()
exit(0)
def _check_instance(self):
if not os.path.isfile(self.pid_file):
return
# Read the pid from file
pid = 0
try:
pid_file = open(self.pid_file, 'rt')
data = pid_file.read()
pid_file.close()
pid = int(data)
except Exception:
pass
# Check whether the process specified exists
if pid == 0:
return
try:
os.kill(pid, 0) # exception if the pid is invalid
except Exception:
return
from gi.repository import Gtk
import gettext
from gettext import gettext as _
gettext.textdomain('gufw')
dialog = Gtk.MessageDialog(None, 0, Gtk.MessageType.INFO, Gtk.ButtonsType.OK, _("Please, just one Gufw's instance"))
dialog.format_secondary_text(_("Gufw is already running. If this is wrong, remove the file: ") + self.pid_file)
dialog.run()
dialog.destroy()
exit(0)
def _start_application(self):
if self._under_ssh():
return
pid_file = open(self.pid_file, 'wt')
pid_file.write(str(os.getpid()))
pid_file.close()
def _under_ssh(self):
try:
if sys.argv[1] == '-ssh':
return True
except Exception:
pass
return False
def exit_app(self):
try:
os.remove(self.pid_file)
except Exception:
pass
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