root / pykota / trunk / bin / warnpykota @ 1095

#! /usr/bin/env python

# PyKota Print Quota Warning sender
#
# PyKota - Print Quotas for CUPS and LPRng
#
# (c) 2003 Jerome Alet <alet@librelogiciel.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
#
# $Id$
#
# $Log$
# Revision 1.21  2003/07/07 12:19:52  jalet
# Now repykota and warnpykota --groups check the groups the user is a member of
# in the print quota database, not in the system passwd/group files
#
# Revision 1.20  2003/06/25 14:10:01  jalet
# Hey, it may work (edpykota --reset excepted) !
#
# Revision 1.19  2003/04/29 22:03:38  jalet
# Better error handling.
#
# Revision 1.18  2003/04/23 22:13:56  jalet
# Preliminary support for LPRng added BUT STILL UNTESTED.
#
# Revision 1.17  2003/04/17 13:32:17  jalet
# bad documentation string
#
# Revision 1.16  2003/04/16 12:35:49  jalet
# Groups quota work now !
#
# Revision 1.15  2003/04/10 21:47:20  jalet
# Job history added. Upgrade script neutralized for now !
#
# Revision 1.14  2003/04/08 21:31:39  jalet
# (anything or 0) = anything !!! Go back to school Jerome !
#
# Revision 1.13  2003/04/08 21:13:44  jalet
# Prepare --groups option to work.
#
# Revision 1.12  2003/04/08 21:10:18  jalet
# Checks --groups option presence instead of --users because --users is the default.
#
# Revision 1.11  2003/03/29 13:45:27  jalet
# GPL paragraphs were incorrectly (from memory) copied into the sources.
# Two README files were added.
# Upgrade script for PostgreSQL pre 1.01 schema was added.
#
# Revision 1.10  2003/03/25 11:45:32  jalet
# Clearer help.
#
# Revision 1.9  2003/03/09 23:39:14  jalet
# Simplified translations.
#
# Revision 1.8  2003/02/10 12:07:30  jalet
# Now repykota should output the recorded total page number for each printer too.
#
# Revision 1.7  2003/02/09 13:40:29  jalet
# typo
#
# Revision 1.6  2003/02/09 12:56:53  jalet
# Internationalization begins...
#
# Revision 1.5  2003/02/07 23:24:38  jalet
# Empty line deleted
#
# Revision 1.4  2003/02/06 23:25:40  jalet
# Cleaner docstring
#
# Revision 1.3  2003/02/06 23:20:02  jalet
# warnpykota doesn't need any user/group name argument, mimicing the
# warnquota disk quota tool.
#
# Revision 1.2  2003/02/06 22:54:33  jalet
# warnpykota should be ok
#
#
#

import sys
import os
import pwd
import grp

from pykota import version
from pykota.tool import PyKotaTool, PyKotaToolError
from pykota.config import PyKotaConfigError
from pykota.storage import PyKotaStorageError

__doc__ = """warnpykota v%s (C) 2003 C@LL - Conseil Internet & Logiciels Libres

Sends mail to users over print quota.

command line usage :

  warnpykota  [options]  [names]

options :

  -v | --version       Prints warnpykota's version number then exits.
  -h | --help          Prints this message then exits.
  
  -u | --users         Warns users over their print quota, this is the 
                       default.
  
  -g | --groups        Warns users whose groups quota are over limit.
  
  -P | --printer p     Verify quotas on this printer only. Actually p can
                       use wildcards characters to select only
                       some printers. The default value is *, meaning
                       all printers.
  
examples :                              

  $ warnpykota --printer lp
  
  This will warn all users of the lp printer who have exceeded their
  print quota.

  $ warnpykota 
  
  This will warn all users  who have exceeded their print quota on
  any printer.

  $ warnpykota --groups --printer "laserjet*" "dev*"
  
  This will warn all users of groups which names begins with "dev" and
  who have exceeded their print quota on any printer which name begins 
  with "laserjet"
  
  If launched by a non-root user, additionnal arguments representing
  users or groups names are ignored, and only the current user/group
  is warned.

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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

Please e-mail bugs to: %s""" % (version.__version__, version.__author__)
        
class WarnPyKota(PyKotaTool) :        
    """A class for warnpykota."""
    def main(self, ugnames, options) :
        """Warn users or groups over print quota."""
        uid = os.geteuid()
        if not uid :
            # root user
            if not ugnames :
                # no username, means all usernames
                ugnames = [ "*" ]
        else :        
            # not the root user
            # warns only the current user
            # the utility of this is discutable, but at least it
            # protects other users from mail bombing if they are
            # over quota.
            username = pwd.getpwuid(uid)[0]
            if options["groups"] :
                user = self.storage.getUser(username)
                if user.Exists :
                    ugnames = [ g.Name for g in self.storage.getUserGroups(user) ]
                else :    
                    ugnames = [ ]
            else :
                ugnames = [ username ]
        
        printers = self.storage.getMatchingPrinters(options["printer"])
        if not printers :
            raise PyKotaToolError, _("There's no printer matching %s") % options["printer"]
        for printer in printers :
            if options["groups"] :
                for (group, grouppquota) in self.storage.getPrinterGroupsAndQuotas(printer, ugnames) :
                    self.warnGroupPQuota(grouppquota)
            else :
                for (user, userpquota) in self.storage.getPrinterUsersAndQuotas(printer, ugnames) :
                    self.warnUserPQuota(userpquota)
                     
if __name__ == "__main__" : 
    try :
        defaults = { \
                     "printer" : "*", \
                   }
        short_options = "vhugP:"
        long_options = ["help", "version", "users", "groups", "printer="]
        
        # Initializes the command line tool
        sender = WarnPyKota(doc=__doc__)
        
        # parse and checks the command line
        (options, args) = sender.parseCommandline(sys.argv[1:], short_options, long_options, allownothing=1)
        
        # sets long options
        options["help"] = options["h"] or options["help"]
        options["version"] = options["v"] or options["version"]
        options["users"] = options["u"] or options["users"]
        options["groups"] = options["g"] or options["groups"]
        options["printer"] = options["P"] or options["printer"] or defaults["printer"]
        
        if options["help"] :
            sender.display_usage_and_quit()
        elif options["version"] :
            sender.display_version_and_quit()
        elif options["users"] and options["groups"] :    
            raise PyKotaToolError, _("incompatible options, see help.")
        else :
            sys.exit(sender.main(args, options))
    except (PyKotaToolError, PyKotaConfigError, PyKotaStorageError), msg :            
        sys.stderr.write("%s\n" % msg)
        sys.stderr.flush()
        sys.exit(-1)