mailpopbox.go

   1 // mailpopbox
   2 // Copyright 2020 Blue Static <https://www.bluestatic.org>
   3 // This program is free software licensed under the GNU General Public License,
   4 // version 3.0. The full text of the license can be found in LICENSE.txt.
   5 // SPDX-License-Identifier: GPL-3.0-only
   6
   7 package main
   8
   9 import (
  10         "encoding/json"
  11         "fmt"
  12         "os"
  13
  14         "go.uber.org/zap"
  15 )
  16
  17 func main() {
  18         if len(os.Args) != 2 {
  19                 fmt.Fprintf(os.Stderr, "Usage: %s config.json\n", os.Args[0])
  20                 os.Exit(1)
  21         }
  22
  23         configFile, err := os.Open(os.Args[1])
  24         if err != nil {
  25                 fmt.Fprintf(os.Stderr, "config file: %s\n", err)
  26                 os.Exit(2)
  27         }
  28
  29         var config Config
  30         if err := json.NewDecoder(configFile).Decode(&config); err != nil {
  31                 fmt.Fprintf(os.Stderr, "config file: %s\n", err)
  32                 os.Exit(3)
  33         }
  34         configFile.Close()
  35
  36         logConfig := zap.NewDevelopmentConfig()
  37         logConfig.Development = false
  38         logConfig.DisableStacktrace = true
  39         logConfig.Level.SetLevel(zap.DebugLevel)
  40         log, err := logConfig.Build()
  41         if err != nil {
  42                 fmt.Fprintf(os.Stderr, "create logger: %v\n", err)
  43                 os.Exit(4)
  44         }
  45
  46         log.Info("starting mailpopbox", zap.String("hostname", config.Hostname))
  47
  48         pop3 := runPOP3Server(config, log)
  49         smtp := runSMTPServer(config, log)
  50
  51         for {
  52                 select {
  53                 case cm := <-pop3:
  54                         if cm == ServerControlRestart {
  55                                 pop3 = runPOP3Server(config, log)
  56                         } else {
  57                                 break
  58                         }
  59                 case <-smtp:
  60                         // smtp never reloads.
  61                         break
  62                 }
  63         }
  64 }