Problem with subprocess and mkstemp

[Hans Larsen]

Hello,

I'm having this script here:
----
import sys, tempfile, subprocess
if len(sys.argv) > 1:
	i = 0
	while i < 1000:
		print "Hello World" * 500
		i = i + 1
	exit( 1 )

h,fp = tempfile.mkstemp()
print "out: " + fp
out = open(fp, "r")
proc = subprocess.Popen( [sys.argv[0], "1"], stdout = h )
while proc.poll() is None:
	o = out.read()
	if o:
		print o
print out.read()
print "The end"
----

This scripts work wonders on Windows (and I've heard Linux is doing  
well too tyvm - although if one of you could check, I don't have a  
linux ready), but on OSX it outputs nothing. If I change the stdout of  
the subprocess for a pipe, it works well.

I cannot confirm that the bug comes from Python, but I'm pretty sure  
this should work normally. Does anyone know of this problem? Is there  
a workaround? A fix, maybe?

We're using temporary files because a pipe hangs out with large  
output, such as this one.

Thanks a lot,
Hans Larsen
--
My definition of an expert in any field is a person who knows enough  
about what's really going on to be scared.
P. J. Plauger
Computer Language, March 1983

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