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#!/usr/bin/env python3
# this is mostly based off of the code found here:
# http://code.activestate.com/recipes/278731-creating-a-daemon-the-python-way/
from __future__ import annotations
import os
import resource
import signal
import time
UMASK = 0
WORKDIR = "/"
MAXFD = 1024
if (hasattr(os, "devnull")):
REDIRECT_TO = os.devnull
else:
REDIRECT_TO = "/dev/null"
def createDaemon():
try:
pid = os.fork()
except OSError as e:
raise Exception("%s [%d]" % (e.strerror, e.errno))
if (pid == 0):
os.setsid()
try:
pid = os.fork()
except OSError as e:
raise Exception("%s [%d]" % (e.strerror, e.errno))
if (pid == 0):
os.chdir(WORKDIR)
os.umask(UMASK)
else:
with open('/var/run/ansible_test_service.pid', 'w') as f:
f.write("%d\n" % pid)
os._exit(0)
else:
os._exit(0)
maxfd = resource.getrlimit(resource.RLIMIT_NOFILE)[1]
if (maxfd == resource.RLIM_INFINITY):
maxfd = MAXFD
for fd in range(0, maxfd):
try:
os.close(fd)
except OSError: # ERROR, fd wasn't open to begin with (ignored)
pass
os.open(REDIRECT_TO, os.O_RDWR)
os.dup2(0, 1)
os.dup2(0, 2)
return (0)
if __name__ == "__main__":
signal.signal(signal.SIGHUP, signal.SIG_IGN)
retCode = createDaemon()
while True:
time.sleep(1000)
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