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