Python - daemon

@Python

.. code-block:: python

import sys, os
def daemonize(stdin='/dev/null', stdout='/dev/null', stderr='/dev/null'):

try:
pid = os.fork()
if pid > 0:
sys.exit(0)
except OSError, e:
sys.stderr.write("fork #1 failed: (%d) %s\n" % (e.errno, e.strerror))

os.chdir("/")
os.umask(0)
os.setsid()

try:
pid = os.fork()
if pid > 0:
sys.exit(0)
except OSError, e:
sys.stderr.write("fork #2 failed: (%d) %s\n" % (e.errno, e.strerror))
sys.exit(1)

for f in sys.stdout, sys.stderr: f.flush()
si = file(stdin, 'r')
so = file(stdout, 'a+')
se = file(stderr, 'a+', 0)
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stdout.fileno())