UIBase: add a syslog ui

Rather than having an option for syslog output, make a separate UI
option.

Signed-off-by: Ben Boeckel <mathstuf@gmail.com>
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>

offlineimap/ui/Noninteractive.py

@@ -17,6 +17,7 @@
 
 import logging
 from offlineimap.ui.UIBase import UIBase
+import offlineimap
 
 class Basic(UIBase):
     """'Basic' simply sets log level to INFO"""
@@ -27,3 +28,22 @@ class Quiet(UIBase):
     """'Quiet' simply sets log level to WARNING"""
     def __init__(self, config, loglevel = logging.WARNING):
         return super(Quiet, self).__init__(config, loglevel)
+
+class Syslog(UIBase):
+    """'Syslog' sets log level to INFO and outputs to syslog instead of stdout"""
+    def __init__(self, config, loglevel = logging.INFO):
+        return super(Syslog, self).__init__(config, loglevel)
+
+    def setup_consolehandler(self):
+        # create syslog handler
+        ch = logging.handlers.SysLogHandler('/dev/log')
+        # create formatter and add it to the handlers
+        self.formatter = logging.Formatter("%(message)s")
+        ch.setFormatter(self.formatter)
+        # add the handlers to the logger
+        self.logger.addHandler(ch)
+        self.logger.info(offlineimap.banner)
+        return ch
+
+    def setup_sysloghandler(self):
+        pass