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copied!<p>As NSD asked, it really depends on how it is spawned. If you are using a shell script, for example, you can use the <code>nohup</code> command to run the child through.</p> <p>If you are using <code>fork/exec</code>, then it is a little more complicated, but no too much so. </p> <p>From <a href="http://code.activestate.com/recipes/66012/" rel="noreferrer">http://code.activestate.com/recipes/66012/</a></p> <pre><code>import sys, os def main(): """ A demo daemon main routine, write a datestamp to /tmp/daemon-log every 10 seconds. """ import time f = open("/tmp/daemon-log", "w") while 1: f.write('%s\n' % time.ctime(time.time())) f.flush() time.sleep(10) if __name__ == "__main__": # do the UNIX double-fork magic, see Stevens' "Advanced # Programming in the UNIX Environment" for details (ISBN 0201563177) try: pid = os.fork() if pid > 0: # exit first parent sys.exit(0) except OSError, e: print >>sys.stderr, "fork #1 failed: %d (%s)" % (e.errno, e.strerror) sys.exit(1) # decouple from parent environment os.chdir("/") os.setsid() os.umask(0) # do second fork try: pid = os.fork() if pid > 0: # exit from second parent, print eventual PID before print "Daemon PID %d" % pid sys.exit(0) except OSError, e: print >>sys.stderr, "fork #2 failed: %d (%s)" % (e.errno, e.strerror) sys.exit(1) # start the daemon main loop main() </code></pre> <p>This is one of the best books ever written. It covers these topics in great and extensive detail.</p> <p><strong>Advanced Programming in the UNIX Environment, Second Edition (Addison-Wesley Professional Computing Series) (Paperback)</strong></p> <p>ISBN-10: 0321525949<br /> ISBN-13: 978-0321525949</p> <p>5 star amazon reviews (I'd give it 6).</p>

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