从版本V 1.4.0.0开始，socat具有选项重试"，永久"和间隔".

As of version V 1.4.0.0 socat features the options "retry", "forever", and "interval".

因此，这应该给您所需的行为:

So, this should give you the desired behavior:

socat pty,link=/dev/ttyS9 tcp:10.0.10.1:9999,forever,interval=10,fork