daemonize.py 文件源码

def _close_fds():

    try:
        max_fd = os.sysconf("SC_OPEN_MAX")
    except ValueError as e:
        logger.warn(repr(e) + ' while get max fds of a process')
        max_fd = 65536

    for i in xrange(3, max_fd):
        try:
            os.close(i)
        except OSError:
            pass