daemonize.py
26 lines
| 831 B
| text/x-python
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PythonLexer
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r4019 | """daemonize function from twisted.scripts._twistd_unix.""" | ||
| #----------------------------------------------------------------------------- | ||||
| # Copyright (c) Twisted Matrix Laboratories. | ||||
| # See Twisted's LICENSE for details. | ||||
| # http://twistedmatrix.com/ | ||||
| #----------------------------------------------------------------------------- | ||||
| import os, errno | ||||
| def daemonize(): | ||||
| # See http://www.erlenstar.demon.co.uk/unix/faq_toc.html#TOC16 | ||||
| if os.fork(): # launch child and... | ||||
| os._exit(0) # kill off parent | ||||
| os.setsid() | ||||
| if os.fork(): # launch child and... | ||||
| os._exit(0) # kill off parent again. | ||||
| null = os.open('/dev/null', os.O_RDWR) | ||||
| for i in range(3): | ||||
| try: | ||||
| os.dup2(null, i) | ||||
| except OSError, e: | ||||
| if e.errno != errno.EBADF: | ||||
| raise | ||||
| os.close(null) | ||||