From: muta...@gmail.com   
      
   On Wednesday, October 13, 2021 at 9:39:35 AM UTC+11, Scott Lurndal wrote:   
      
   > >BTW, another thing I will need to do (I think) is to setvbuf   
   > >the COM1 stream to make it unbuffered.   
      
   > The NNTP protocol is line oriented, so a line-buffered stream   
   > is just fine.   
      
   Even assuming ASCII, and even assuming LF endings,   
   what is the interaction here? Ultimately the C library is   
   going to do some sort of read() call on the UART/TCPIP   
   stream. It needs to know to return immediately, not wait   
   for a fixed-length buffer to be filled.   
      
   How can that be done other than insisting on a read of   
   length 1, and how can that be done other than switching   
   off buffering with setvbuf?   
      
   Thanks. Paul.   
      
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