Initial commit

Author: lutzky

daemonize.py

@@ -0,0 +1,57 @@
+#!/usr/bin/python
+
+# daemonize.py by Ohad Lutzky <[email protected]>
+# Ported from Brian Clapper's daemonize at
+# http://www.clapper.org/software/daemonize/
+
+"""Simple daemonization utility based on BSD daemon(3)
+
+Usage from within python:
+- import daemonize
+- run daemonize.daemon() at the appropriate time
+
+Usage from the shell:
+daemonize.py [path] [arguments]
+
+Note that [path] has to be a full path to an executable file
+"""
+
+import os, sys
+
+def daemon(nochdir = False, noclose = False):
+    """Daemonizes the current process; this means detaching from the
+    controlling terminal and running in the background as a system
+    daemon.
+
+    Unless nochdir is set, the current working directory is set to "/".
+
+    Unless noclose is set, standard input, output and error will be
+    redirected to /dev/null."""
+
+    def do_fork():
+        if os.fork() != 0:
+            # This is the parent, we should exit
+            os._exit(0)
+        # Note that we don't check the return value of fork - we want to
+        # become a child, and upon error, an exception will be thrown
+
+    def redirect_fds():
+        os.close(0)
+        os.close(1)
+        os.close(2)
+
+        os.open("/dev/null", os.O_RDWR)
+        os.dup(0)
+        os.dup(0)
+
+    do_fork()
+    os.setsid()
+    do_fork()
+    os.umask(0)
+
+    if not nochdir: os.chdir("/")
+    if not noclose: redirect_fds()
+
+if __name__ == '__main__':
+    daemon(0,0)
+    os.execv(sys.argv[1], sys.argv[2:])