return value of system() function

[seongsu]

Hi,

I found that the system() function in Dumbo always returns zero if the actual return value is less than 256. As you know, command 'hadoop fs -test -e' returns 1 if the given path do not exists. But the system() function returns zero in the case. I think '/ 256' should be removed in the code.

def system(cmd, stdout=sys.stdout, stderr=sys.stderr):
    if sys.version[:3] == '2.4':
        return os.system(cmd) / 256
    proc = subprocess.Popen(cmd, shell=True, stdout=stdout,
                            stderr=stderr)
    return os.waitpid(proc.pid, 0)[1] / 256

Please let me know what you think of this. Thanks.
Seongsu