1
# daemon code from ASPN
6
def daemonize(pidfile, home):
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Detach this process from the controlling terminal and run it in the
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background as a daemon.
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REDIRECT_TO = getattr(os, 'devnull', '/dev/null')
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raise Exception("%s [%d]" % (e.strerror, e.errno))
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if (pid == 0): # The first child.
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pid = os.fork() # Fork a second child.
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raise Exception, "%s [%d]" % (e.strerror, e.errno)
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if (pid == 0): # The second child.
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os._exit(0) # Exit parent (the first child) of the second child.
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os._exit(0) # Exit parent of the first child.
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#import resource # Resource usage information.
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#maxfd = resource.getrlimit(resource.RLIMIT_NOFILE)[1]
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#if (maxfd == resource.RLIM_INFINITY):
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# Iterate through and close all file descriptors.
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#for fd in range(3, maxfd):
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# except OSError: # ERROR, fd wasn't open to begin with (ignored)
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# This call to open is guaranteed to return the lowest file descriptor,
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# which will be 0 (stdin), since it was closed above.
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#os.open(REDIRECT_TO, os.O_RDWR) # standard input (0)
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# Duplicate standard input to standard output and standard error.
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#os.dup2(0, 1) # standard output (1)
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#os.dup2(0, 2) # standard error (2)
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f = open(pidfile, 'w')
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f.write('%d\n' % (os.getpid(),))
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f.write('%s\n' % (home,))
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def is_running(pidfile):
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f = open(pidfile, 'r')
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pid = int(f.readline())
added
removed
loggerhead/daemon.py
