import os
import sys
from subprocess import Popen, PIPE, STDOUT

def runCommand():
    p = Popen(['perl', 'C:\\Programming\\ack.pl', '--type=cc', '"#define"'], shell = True, stdout=PIPE, stderr=PIPE, cwd = 'C:\\Programming\\TestDir')
    while True:
        retcode = p.poll()
        line = p.stdout.read()
        print len(line), line
        if retcode is not None:
            print 'application exited with retcode ' + str(retcode)
            break

print 'start'
runCommand()
print 'stop'