src/plugins/exim.sml

   1 (* HCoop Domtool (http://hcoop.sourceforge.net/)
   2  * Copyright (c) 2006, Adam Chlipala
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17  *)
  18
  19 (* Exim MTA handling *)
  20
  21 structure Exim :> EXIM = struct
  22
  23 val aliasesChanged = ref false
  24 val aliasesDefaultChanged = ref false
  25 val hostsChanged = ref false
  26
  27 val () = Slave.registerPreHandler
  28              (fn () => (aliasesChanged := false;
  29                         aliasesDefaultChanged := false;
  30                         hostsChanged := false))
  31
  32 val () = Slave.registerFileHandler (fn fs =>
  33                                        let
  34                                            val spl = OS.Path.splitDirFile (#file fs)
  35                                        in
  36                                            if #file spl = "aliases" then
  37                                                aliasesChanged := true
  38                                            else if #file spl = "aliases.default" then
  39                                                aliasesDefaultChanged := true
  40                                            else if #file spl = "mail" then
  41                                                hostsChanged := true
  42                                            else
  43                                                ()
  44                                        end)
  45
  46 val () = Slave.registerPostHandler
  47          (fn () =>
  48              (if !aliasesChanged then
  49                   Slave.concatTo (fn s => s = "aliases") Config.Exim.aliases
  50               else
  51                   ();
  52               if !aliasesDefaultChanged then
  53                   Slave.concatTo (fn s => s = "aliases.default") Config.Exim.aliasesDefault
  54               else
  55                   ();
  56               if !hostsChanged then
  57                   Slave.enumerateTo (fn s => s = "mail") ":" Config.Exim.handleDomains
  58               else
  59                   ();
  60               if !aliasesChanged orelse !aliasesDefaultChanged
  61                  orelse !hostsChanged then
  62                   Slave.shellF ([Config.Exim.reload],
  63                                 fn cl => "Error reloading exim with " ^ cl)
  64               else
  65                   ()))
  66
  67
  68 val () = Env.action_none "handleMail"
  69          (fn () => TextIO.closeOut (Domain.domainFile "mail"))
  70
  71 end