import initial
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gestion/config_mail.py
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283
gestion/config_mail.py
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#! /usr/bin/env python
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# -*- coding: iso8859-15 -*-
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###############################################################################
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# config_mail : gestion du .forward et .procmailrc des adhérents
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###############################################################################
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# The authors of this code are
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# Etienne Chové <etienne.chove@crans.org>
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#
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# Copyright (C) 2006 Etienne Chové
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# All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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###############################################################################
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############################################################################
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## Chaines de formatage pour le procmailrc
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"""
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Script permetant de gérer sa configuration mail
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Usage : ConfigMail.py [--forward=(|<mail>)] [--spam=(accepte|marque|supprime)]
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Retourne :
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forward=(|<mail>)
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spam=(accepte|marque|supprime)
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"""
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procmail_warning = """################################################################
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# Ce fichier de configuration a été automatiquement généré par #
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# l'intranet. #
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# #
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# ATTENTION : ne le modifiez que si vous savez ce que vous #
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# faites !!! #
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################################################################
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"""
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procmail_mark = """# Passage des mails dans spamassassin
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:0 Whbf
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* < 256000
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| spamc
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# Serveur blacklisté
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:0
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* ^X-Reject: 554
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* !^X-Spam-Status: Yes
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{
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:0 Whf
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* ^Subject:\/.*
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| formail -i "Subject: *****SPAM***** $MATCH"
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}
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"""
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procmail_delete_spam = """# Suppression des spams
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:0 Whf
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* ^Subject: *****SPAM*****
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/dev/null
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"""
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procmail_forward = """# Redirection des mails
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:0
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!%s
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"""
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forward_procmail = '"|exec /usr/bin/procmail"\n'
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##
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############################################################################
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from commands import getstatusoutput
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import os, sys, pwd, getopt
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home = pwd.getpwuid(os.getuid())[5]
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import re
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class MailConfigError(ReferenceError):
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pass
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############################################################################
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## Fonctions utiles
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def _IsMail(mail):
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"""
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Dit si la chaine fournie est une adresse mail valide
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"""
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return bool(re.match('[a-z0-9_\.-]+@[a-z0-9_-]+(\.[a-z0-9_-]+)+',mail))
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def _Clean(texte):
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"""
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Nettoie une chaine de caractère/liste en supprimant les lignes vides/commentés,
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et retourne une liste
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"""
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if type(texte) != list:
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texte = texte.split('\n')
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return [ x.strip() for x in texte if x.strip() and x[0]!='#' ]
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def _GetConfig():
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""" Retourne la configuration de l'utilisateur courant,
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sous forme d'un dictionnaire
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"""
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## lecture du fichier .forward
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try:
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fic_forward = _Clean( open('%s/.forward'%home).readlines() )
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if len(fic_forward) != 1:
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raise MailConfigError, 'Fichier forward trop long'
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fic_forward = fic_forward[0]
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except IOError:
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return {'forward':'', 'spam':'accepte'}
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# forward simple
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if _IsMail(fic_forward):
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return {'forward':fic_forward, 'spam':'accepte'}
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# utilisation de procmail
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if fic_forward != _Clean(forward_procmail)[0]:
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raise MailConfigError, 'Fichier forward non compréhensible'
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## lecture du .procmailrc
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fic_procmail = _Clean( open('%s/.procmailrc'%home).readlines() )
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# forward
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if _IsMail( fic_procmail[-1][1:].strip() ) and fic_procmail[-2] == ":0" :
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forward = fic_procmail[-1][1:].strip()
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fic_procmail = fic_procmail[:-2]
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else:
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forward = ''
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# forward simple dans le procmailrc
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if not fic_procmail:
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return {'forward':forward, 'spam':'accepte'}
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# marquage des spams
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tmp = _Clean( procmail_mark )
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if fic_procmail[:len(tmp)] != tmp:
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raise MailConfigError, 'Fichier de procmail non compréhensible'
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fic_procmail = fic_procmail[len(tmp):]
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# suppression des spams ?
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if not fic_procmail:
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return {'forward':forward, 'spam':'marque'}
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elif fic_procmail == _Clean(procmail_delete_spam):
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return {'forward':forward, 'spam':'supprime'}
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else:
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raise MailConfigError, 'Fichier de procmail non compréhensible'
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def _SetConfig(forward = None, spam= None):
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""" Modifie la configuration de l'utilisateur courant """
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# variable new_spam
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if spam in ['accepte','supprime','marque']:
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new_spam = spam
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elif spam == None:
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new_spam = _GetConfig()['spam']
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else:
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raise ValueError, 'Valeur interdite pour le paramètre spam'
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# variable forward
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if forward == None:
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new_forward = _GetConfig()['forward']
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elif _IsMail(forward) or forward=='':
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new_forward = forward
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else:
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raise ValueError, 'Adresse mail invalide'
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# génération des fichiers
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if new_spam=='accepte':
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# suppression du .procmailrc
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try:
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os.remove('%s/.procmailrc'%home)
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except:
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pass
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# remplissage du .forward
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if new_forward:
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open('%s/.forward'%home,'w').write('%s\n'%new_forward)
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else:
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os.remove('%s/.forward'%home)
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else:
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# écriture du .procmailc
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txt = procmail_warning + procmail_mark
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if new_spam=='supprime':
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txt += procmail_delete_spam
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if new_forward:
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txt += procmail_forward % new_forward
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open('%s/.procmailrc'%home,'w').write(txt)
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# écriture du .forward
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open('%s/.forward'%home,'w').write(forward_procmail)
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def _Sudo(uid, forward=None, spam=None):
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""" Execute le script pour un autre utilisateur """
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# construction de la ligne de commande
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if __file__=='.pyc':
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f = __file__[:-1]
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else:
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f = __file__
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c = "/usr/bin/sudo -u %s %s" % (uid, os.path.abspath(f))
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if forward!=None:
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c += " --forward=%s" % forward
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if spam!=None:
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c += " --spam=%s" % spam
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# execution de la commande
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print c
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status, output = getstatusoutput(c)
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# code d'erreur
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if status:
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print "Erreur sudo"
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sys.exit(status)
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# valeurs de retour
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res = {}
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for line in output.split('\n'):
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line = line.split('=')
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res[line[0]] = len(line)==2 and line[1] or ''
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return res
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##
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############################################################################
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def MailConfig(uid=None, forward=None, spam=None):
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""" Modifie ou retourne la configuration mail de l'utilisateur
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user = utilisateur à configurer, si None configure l'utilisateur courant
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forward = adresse vers laquelle rediriger les mails, chaine vide si pas de redirection
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spam = action à effectuer sur les spams (accepte, supprime, marque)
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Pour les champs forward et spam, la valeur None ne touche pas au champ.
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Retourne un dictionnaire { 'forward':'', 'spam':'' }
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"""
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## demande pour un autre utilisateur
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if uid:
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return _Sudo(uid=uid, forward=forward, spam=spam)
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## nettoyage des variables
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cfg = _GetConfig()
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if forward == cfg['forward']:
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forward = None
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if spam == cfg['spam']:
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spam = None
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## modifications
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if forward!=None or spam!=None:
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_SetConfig(forward=forward, spam=spam)
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## on renvoie la configuration
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return _GetConfig()
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if __name__=="__main__":
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## parsage des arguments
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forward = None
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spam = None
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opts, args = getopt.getopt(sys.argv[1:], "", ['forward=', 'spam='])
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for o, v in opts:
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if o == "--forward":
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forward = v
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elif o == '--spam':
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spam = v
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## execution de MailConfig
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res = MailConfig(forward=forward, spam=spam)
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## affichage des résultats
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for i in res.items():
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print "%s=%s" % i
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