1 files changed, 79 insertions, 0 deletions
diff --git a/Mailman/Logging/Logger.py b/Mailman/Logging/Logger.py
new file mode 100644
index 000000000..8a111940a
--- /dev/null
+++ b/Mailman/Logging/Logger.py
@@ -0,0 +1,79 @@
+# Copyright (C) 1998 by the Free Software Foundation, Inc.
+#
+# 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.
+
+"""File-based logger, writes to named category files in mm_cfg.LOG_DIR."""
+
+import sys
+import os
+import Mailman.mm_cfg
+from Mailman.Logging.Utils import __logexc
+
+
+class Logger:
+    def __init__(self, category, nofail=1):
+        """Nofail (by default) says to fallback to sys.stderr if write
+        fails to category file.  A message is emitted, but the IOError is
+        caught.  Set nofail=0 if you want to handle the error in your code,
+        instead.
+        """
+        self.__filename = os.path.join(Mailman.mm_cfg.LOG_DIR, category)
+	self.__fp = None
+        self.__nofail = nofail
+
+    def __del__(self):
+        self.close()
+
+    def __repr__(self):
+        return '<Logger to file: %s>' % self.__filename
+
+    def __get_f(self):
+	if self.__fp:
+	    return self.__fp
+	else:
+	    try:
+		ou = os.umask(002)
+		try:
+		    f = self.__fp = open(self.__filename, 'a+')
+		finally:
+		    os.umask(ou)
+	    except IOError, msg:
+                if self.__nofail:
+                    __logexc(self, msg)
+                else:
+                    # re-raise the original exception
+                    raise
+	    return f
+
+    def flush(self):
+	f = self.__get_f()
+	if hasattr(f, 'flush'):
+	    f.flush()
+
+    def write(self, msg):
+	f = self.__get_f()
+	try:
+	    f.write(msg)
+	except IOError, msg:
+            __logexc(self, msg)
+
+    def writelines(self, lines):
+	for l in lines:
+	    self.write(l)
+
+    def close(self):
+	if not self.__fp:
+	    return
+	self.__get_f().close()