--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/django/utils/daemonize.py	Fri Jul 18 18:22:23 2008 +0000
@@ -0,0 +1,57 @@
+import os
+import sys
+
+if os.name == 'posix':
+    def become_daemon(our_home_dir='.', out_log='/dev/null', err_log='/dev/null'):
+        "Robustly turn into a UNIX daemon, running in our_home_dir."
+        # First fork
+        try:
+            if os.fork() > 0:
+                sys.exit(0)     # kill off parent
+        except OSError, e:
+            sys.stderr.write("fork #1 failed: (%d) %s\n" % (e.errno, e.strerror))
+            sys.exit(1)
+        os.setsid()
+        os.chdir(our_home_dir)
+        os.umask(0)
+
+        # Second fork
+        try:
+            if os.fork() > 0:
+                os._exit(0)
+        except OSError, e:
+            sys.stderr.write("fork #2 failed: (%d) %s\n" % (e.errno, e.strerror))
+            os._exit(1)
+
+        si = open('/dev/null', 'r')
+        so = open(out_log, 'a+', 0)
+        se = open(err_log, 'a+', 0)
+        os.dup2(si.fileno(), sys.stdin.fileno())
+        os.dup2(so.fileno(), sys.stdout.fileno())
+        os.dup2(se.fileno(), sys.stderr.fileno())
+        # Set custom file descriptors so that they get proper buffering.
+        sys.stdout, sys.stderr = so, se
+else:
+    def become_daemon(our_home_dir='.', out_log=None, err_log=None):
+        """
+        If we're not running under a POSIX system, just simulate the daemon
+        mode by doing redirections and directory changing.
+        """
+        os.chdir(our_home_dir)
+        os.umask(0)
+        sys.stdin.close()
+        sys.stdout.close()
+        sys.stderr.close()
+        if err_log:
+            sys.stderr = open(err_log, 'a', 0)
+        else:
+            sys.stderr = NullDevice()
+        if out_log:
+            sys.stdout = open(out_log, 'a', 0)
+        else:
+            sys.stdout = NullDevice()
+
+    class NullDevice:
+        "A writeable object that writes to nowhere -- like /dev/null."
+        def write(self, s):
+            pass