Console on SMC2 (was: Re: MPC823 Serial ports)

Graham Stoney greyham at
Mon Oct 25 13:20:45 EST 1999

Noah Misch writes:
> They were replaced by /dev/ttyS*.

On our Linux 2.2 Intel boxes, opening /dev/ttyS* blocks until the modem
control lines become active if the port is in non-CLOCAL mode, whereas
/dev/cua* doesn't. Since you can't change mode without opening the device,
/dev/cua* is required to avoid the chicken-and-egg problem. Have the semantics
of /dev/ttyS* changed to remove the need for /dev/cua*?


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