From efdc99dd91e67b4e03a764c136154146f597d28a Mon Sep 17 00:00:00 2001
From: Christos Stavrakakis <cstavr@grnet.gr>
Date: Thu, 15 Nov 2012 14:43:15 +0200
Subject: [PATCH] Reopen stdout & stderr if redirected to error log

To use the logrotate utility, a USR1 signal is sent, and the
corresponding handler reopens the log files. However, sys.stdout and
sys.stderr, which may be redirected to the error log file, are not
updated. This commit fixes this, by closing the fileobj of the
LazyWriter object. There is no need to reopen it, since the LazyWriter
will open it when needed.
---
 gunicorn/glogging.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/gunicorn/glogging.py b/gunicorn/glogging.py
index d15925fd..1c5c603b 100644
--- a/gunicorn/glogging.py
+++ b/gunicorn/glogging.py
@@ -74,6 +74,16 @@ class LazyWriter(object):
                 self.lock.release()
         return self.fileobj
 
+    def close(self):
+        if self.fileobj:
+            self.lock.acquire()
+            try:
+                if self.fileobj:
+                    self.fileobj.close()
+                    self.fileobj = None
+            finally:
+                self.lock.release()
+
     def write(self, text):
         fileobj = self.open()
         fileobj.write(text)
@@ -239,6 +249,10 @@ class Logger(object):
 
 
     def reopen_files(self):
+        if self.cfg.errorlog != "-":
+            # Close stderr & stdout if they are redirected to error log file
+            sys.stderr.close()
+            sys.stdout.close()
         for log in loggers():
             for handler in log.handlers:
                 if isinstance(handler, logging.FileHandler):