the dreaded double fork

[Дамјан Георгиевски]

> I am using python to run an xml rpc daemon using SimpleXMLRPCServer.
> Following a cookbook recipe, I am trying to do a double fork so that
> when I exit the shell the daemon remains running.  But it doesn't.
> Here is how I start the script
> 
>> ssh somehost
>> sudo python mydaemon start&
> 
> But when I exit the shell, I lose the process.

You need to close the file descriptors to the controlling TTY. This is how I
do it.

    f = file('/dev/null', 'r+')
    fd = f.fileno()
    os.dup2(fd,0)
    os.dup2(fd,1)
    os.dup2(fd,2)
    f.close()

Beware, sys.stdxxx.close() is not enough.


-- 
дамјан

               Speak softly and carry a cellular phone.