misc.py 文件源码

def dealarm_shell(tube):
    """Given a tube which is a shell, dealarm it.
    """
    tube.clean()

    tube.sendline('which python')
    if tube.recvline().startswith('/'):
        tube.sendline('''exec python -c "import signal, os; signal.alarm(0); os.execl('$SHELL','')"''')
        return tube

    tube.sendline('which perl')
    if tube.recvline().startswith('/'):
        tube.sendline('''exec perl -e "alarm 0; exec '$SHELL'"''')
        return tube

    return None