Re: subprocess & redirect

On Wed, 29 Mar 2006 23:28:25 -0500, "Philip Semanchuk"
<[email protected]> said:
> On Mar 22, 2006, at 6:45 PM, Philip Semanchuk wrote:
> > On Mar 21, 2006, at 4:45 PM, Jonathan Ellis wrote:
> >
> >> Strange.  My first guess would be that the child process is somehow
> >> interacting with stdout (which Spyce redirects to an internal file
> >> handle) which screws things up here.  But even when I specify
> >> subprocess.PIPE for the subprocess stdin/out/err I get the same 
> >> results.
> >>  So I don't know.  Let me know if you figure it out. :)
> 
> Jonathan,
> You were correct, although it wasn't stdout that was the problem (even 
> though that makes the most sense). If I supply the parameter 
> "close_fds=True" to subprocess.Popen(), the problem goes away. The 
> documentation says, "If close_fds is true, all file descriptors except 
> 0, 1 and 2 will be closed before the child process is executed." So it 
> sounds like the child process was holding open some file and Spyce's 
> processing couldn't complete until the child exited and the file was 
> closed.

Hey, great!  Glad you figured out what was going on.  Thanks for keeping
us posted.  Future generations of people who want to use subprocess with
Spyce will thank you. :)

-Jonathan
-- 
C++ is history repeated as tragedy. Java is history repeated as farce.  --Scott McKay



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