Simon Arlott wrote:
> On 27/10/07 13:18, Udo van den Heuvel wrote:
>> handle 5 shows NMEA:
>>
>> [EMAIL PROTECTED] fd]# cat 5
>> $GPRMC,121740,A,5150.2348,N,00457.3738,E,000.0,258.2,271007,000.7,W*69
>>
>> $GPRMC,121741,A,5150.2348,N,00457.3737,E,000.0,258.2,271007,000.7,W*67
>>
>> $GPRMC,121742,A,5150.2347,N,00457.3736,E,000.0,258.2,271007,000.7,W*6A
>> (etc)
> 
> That's the serial device, only one process can/should be reading it at 
> any time. If I run 'cu' or 'cat' on ttyS1 while my process is reading it 
> I get nothing...

Using the method I describe ntpd works (refclock_nmea on LinuxPPS
5.0.0rc*) and I can see the NMEA data.
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