Added logging support

fakesmtpd

@@ -3,22 +3,28 @@
 
 import argparse
 import asyncore
+import errno
+import logging
 import os
 import smtpd
 import tempfile
-import errno
-import smtpd
 
 
 class FakeSMTPServer(smtpd.SMTPServer):
     def __init__(self, localaddr, path):
         smtpd.SMTPServer.__init__(self, localaddr, None)
-        self.path = path
         self.recipients = {}
+        self.path = path
+
+        self.logger = logging.getLogger('fakesmtpd')
+        self.logger.info("SMTP server started")
+        self.logger.info("Mail path %s", path)
 
 
     def process_message(self, peer, mailfrom, rcpttos, data):
+        self.logger.info("Incoming mail from %s", mailfrom)
         for recipient in rcpttos:
+            self.logger.info("Logging mail for %s", recipient)
             count = self.recipients.get(recipient, 0) + 1
             self.recipients[recipient] = count
             filename = "{}.{:d}.mail".format(recipient, count)
@@ -32,15 +38,22 @@ def fakesmtpd_parser():
     parser = argparse.ArgumentParser()
     parser.add_argument('-H', '--host', default='localhost')
     parser.add_argument('-p', '--port', default=25)
-    path = os.path.join(tempfile.gettempdir(), 'fakesmtpd')
+    path = os.path.join(tempfile.gettempdir(),
+                        'fakesmtpd{:d}'.format(os.getpid()))
     parser.add_argument('--path', default=path)
+    parser.add_argument('--log')
     return parser
 
 
 def main():
     parser = fakesmtpd_parser()
     args = parser.parse_args()
 
+    logging.basicConfig(filename=args.log,
+                        format='%(asctime)s:%(levelname)s:%(message)s',
+                        datefmt='%Y-%m-%d %H:%M:%S',
+                        level=logging.DEBUG)
+
     try:
         os.mkdir(args.path)
     except OSError as e:

fakesmtpd.service

@@ -4,7 +4,7 @@ After=syslog.target network.target
 Conflicts=postfix.service exim.service sendmail.service
 
 [Service]
-ExecStart=/usr/bin/fakesmtpd
+ExecStart=/usr/bin/fakesmtpd --log=/var/log/fakesmtpd.log
 
 [Install]
 WantedBy=multi-user.target