closing stdin, stdout and stderr

[Martijn Brouwer]

On Mon, 2005-12-26 at 23:13 +0000, Robin Becker wrote:
> Martijn Brouwer wrote:
> > I am writing a unix daemon in python, so I want to close stdin, stdout
> > and stderr.
> > My first attempt was to the standard file descriptors using their
> > close() methods. After closing stdout, I could not print anymore, so
> > this seemed to work. However, later I noticed that they were not really
> > closed. When I close them using os.close(), it did work.
> > What is the difference between these two methods and what is the reason
> > behind it? It took me a day to find out why I could not log out after
> > starting the daemon.
> > 
> > Martijn
> > 
> > 
> > 
> I've had excellent results with variants of the cookbook entry at
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731
> 

I read this one, which was the reason that I tried os.close instead of
sys.stdXXX.close(). But I would like to know why it does not close a
file discriptor is I call its close method().


Martijn

-- 
Martijn Brouwer <e.a.m.brouwer at alumnus.utwente.nl>