[CalendarServer-changes] [1281] CalendarServer/trunk/twistedcaldav/tap.py

[source_changes at macosforge.org]

Revision: 1281
          http://trac.macosforge.org/projects/calendarserver/changeset/1281
Author:   tfitz at apple.com
Date:     2007-02-27 15:19:06 -0800 (Tue, 27 Feb 2007)

Log Message:
-----------
Added SIGHUP handler to temporarily workaround twistd issue.

Modified Paths:
--------------
    CalendarServer/trunk/twistedcaldav/tap.py

Modified: CalendarServer/trunk/twistedcaldav/tap.py
===================================================================
--- CalendarServer/trunk/twistedcaldav/tap.py	2007-02-27 20:34:16 UTC (rev 1280)
+++ CalendarServer/trunk/twistedcaldav/tap.py	2007-02-27 23:19:06 UTC (rev 1281)
@@ -481,4 +481,21 @@
             raise UsageError("Unknown server type %s.  Please choose: Master, Slave or Combined"
                              % (serverType,))
         else:
-            return serviceMethod(options)
+            service = serviceMethod(options)           
+            
+            # Temporary hack to work around SIGHUP problem
+            # If there is a stopped process in the same session as the calendar server
+            # and the calendar server is the group leader then when twistd forks to drop
+            # privelages a SIGHUP may be sent by the kernel. This SIGHUP should be ignored.
+            # Note that this handler is not unset, so any further SIGHUPs are also ignored.
+            import signal
+            def sighup_handler(num, frame):
+                if frame is None:
+                    location = "Unknown"
+                else:
+                    location = str(frame.f_code.co_name) + ": " + str(frame.f_lineno)
+                log.msg("SIGHUP recieved at " + location)
+            signal.signal(signal.SIGHUP, sighup_handler)
+
+            return service
+

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