Alan Cox wrote:
> > > Thats fine. If you are using a serial port which has a remote adapter that
> > > is running on a high speed RS485 network where DCD is raised and lowered
> > > as packets go past
> > Huh? Strange device...
>
> Not really - thats the normal way RS485 interfaces work. Its a shared bus
> protocol. Im specifically thinking of a set of 1Mbit radio modems in this
> case
I see. Interesting.
> > fd = open( "/dev/ttyS0", O_RDWR | O_NDELAY );
> > tcgetattr( fd, &termios );
>
> Carrier dropped before the tcgetattr - IO error thank you for playing.
Hmmm, as Tytso wrote, tc[gs]etattr() is still allowed, even if read() etc.
give an I/O error. So that shouldn't be a problem.
(Didn't know that before).
> Im not averse to losing cua* but right now I have no other sane way to handle
> devices that use carrier in this way.
Don't clear CLOCAL in the first place :-)
gert
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Gert Doering - Munich, Germany gert@greenie.muc.de
fax: +49-89-35655025 gert.doering@physik.tu-muenchen.de
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