Hi, I'm running into crashes with deamonize() from _twistd_unix.py on OSX 10.6 "snow leopard". Crash report contains the ominous flag: USING_FORK_WITHOUT_EXEC_IS_NOT_SUPPORTED_BY_FILE_MANAGER This flag shows up in some issues reported in other python projects on OSX. Apparently 10.5 was more forgiving about this but 10.6 aborts the process. - Has this been an issue for twisted users on OSX 10.6? - Best practices for addressing it? The code calls fork(), but no exec(): 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) Thanks, Erik van Blokland