VirtualMailManager/Config.py
author Pascal Volk <neverseen@users.sourceforge.net>
Sat, 26 Apr 2008 02:49:34 +0000
changeset 23 d5ad5432e9eb
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child 24 48ea255e8a85
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* 'vmm.1' - completed * 'update_tables_0.4-dev_r24.py' - Deleted from repository
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#!/usr/bin/env python
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# -*- coding: UTF-8 -*-
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# Copyright 2007-2008 VEB IT
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# See COPYING for distribution information.
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# $Id$
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"""Configurtion class for read, modify and write the
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configuration from Virtual Mail Manager.
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"""
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from constants.VERSION import VERSION
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__author__ = 'Pascal Volk <p.volk@veb-it.de>'
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__version__ = VERSION
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__revision__ = 'rev '+'$Rev$'.split()[1]
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__date__ = '$Date$'.split()[1]
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import sys
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from shutil import copy2
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from ConfigParser import ConfigParser
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from cStringIO import StringIO
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from Exceptions import VMMConfigException
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import constants.ERROR as ERR
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class VMMConfig(ConfigParser):
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    """This class is for configure the Virtual Mail Manager.
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    You can specify settings for the database connection
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    and maildirectories.
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    """
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    def __init__(self, filename):
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        """Creates a new VMMConfig instance
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        Keyword arguments:
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        filename -- name of the configuration file
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        """
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        ConfigParser.__init__(self)
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        self.__cfgFileName = filename
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        self.__cfgFile = None
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        self.__VMMsections = ['database', 'maildir', 'services', 'domdir',
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                'bin', 'misc', 'config']
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        self.__changes = False
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        self.__missing = {}
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        self.__dbopts = [
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                ['host', 'localhot'],
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                ['user', 'vmm'],
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                ['pass', 'your secret password'],
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                ['name', 'mailsys']
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                ]
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        self.__mdopts = [
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                ['base', '/home/mail'],
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                ['folder', 'Maildir'],
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                ['mode', 448],
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                ['diskusage', 'false'],
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                ['delete', 'false']
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                ]
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        self.__serviceopts = [
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                ['smtp', 'true'],
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                ['pop3', 'true'],
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                ['imap', 'true'],
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                ['managesieve', 'true']
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                ]
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        self.__domdopts = [
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                ['mode', 504],
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                ['delete', 'false']
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                ]
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        self.__binopts = [
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                ['dovecotpw', '/usr/sbin/dovecotpw'],
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                ['du', '/usr/bin/du']
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                ]
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        self.__miscopts = [
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                ['passwdscheme', 'CRAM-MD5'],
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                ['gid_mail', 8],
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                ['forcedel', 'false'],
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                ['transport', 'dovecot:']
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                ]
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    def load(self):
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        """Loads the configuration, r/o"""
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        try:
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            self.__cfgFile = file(self.__cfgFileName, 'r')
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        except:
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            raise
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        self.readfp(self.__cfgFile)
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        self.__cfgFile.close()
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    def check(self):
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        if not self.__chkSections():
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            errmsg = StringIO()
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            for k,v in self.__missing.items():
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                if v[0] is True:
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                    errmsg.write("missing section: %s\n" % k)
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                else:
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                    errmsg.write("missing options in section %s:\n" % k)
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                    for o in v:
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                        errmsg.write(" * %s\n" % o)
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            raise VMMConfigException((errmsg.getvalue(), ERR.CONF_ERROR))
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    def getsections(self):
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        """Return a list with all configurable sections."""
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        return self.__VMMsections[:-1]
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    def configure(self, sections):
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        """Interactive method for configuring all options in the given section
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        Keyword arguments:
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        sections -- list of strings
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        """
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        if not isinstance(sections, list):
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            raise TypeError("Argument 'sections' is not a list.")
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        # if [config] done = false (default at 1st run),
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        # then set changes true
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        try:
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            if not self.getboolean('config', 'done'):
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                self.__changes = True
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        except ValueError:
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            self.set('config', 'done', 'False')
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            self.__changes = True
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        for s in sections:
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            if s == 'config':
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                pass
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            else:
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                print '* Config section: %s' % s
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            for opt, val in self.items(s):
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                newval = raw_input('Enter new value for %s [%s]: ' %(opt, val))
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                if newval and newval != val:
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                    self.set(s, opt, newval)
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                    self.__changes = True
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            print
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        if self.__changes:
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            self.__saveChanges()
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    def __saveChanges(self):
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        """Writes changes to the configuration file."""
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        self.set('config', 'done', 'true')
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        copy2(self.__cfgFileName, self.__cfgFileName+'.bak')
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        self.__cfgFile = file(self.__cfgFileName, 'w')
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        self.write(self.__cfgFile)
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        self.__cfgFile.close()
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    def __chkSections(self):
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        """Checks if all configuration sections are existing."""
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        errors = False
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        for s in self.__VMMsections:
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            if not self.has_section(s):
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                self.__missing[s] = [True]
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            elif not self.__chkOptions(s):
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                errors = True
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        return not errors
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    def __chkOptions(self, section):
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        """Checks if all configuration options in section are existing.
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        Keyword arguments:
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        section -- the section to be checked
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        """
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        retval = True
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        missing = []
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        if section == 'database':
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            opts = self.__dbopts
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        elif section == 'maildir':
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            opts = self.__mdopts
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        elif section == 'services':
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            opts = self.__serviceopts
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        elif section == 'domdir':
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            opts = self.__domdopts
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        elif section == 'bin':
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            opts = self.__binopts
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        elif section == 'misc':
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            opts = self.__miscopts
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        elif section == 'config':
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            opts = [['done', 'false']]
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        for o, v in opts:
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            if not self.has_option(section, o):
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                missing.append(o)
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                retval = False
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        if len(missing):
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            self.__missing[section] = missing
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        return retval