On  15 Sep, this message from Randall R Schulz echoed through cyberspace:

As you know, the less-than (<) operator in all Unix shells opens the 
file name given as an argument before it executes the command. In 
order for an open() call on a TTY device to complete, the RS232 
hardware signals that indicate the presence of an active device 
connected to the port. In practice, this means that the DTR (data 
terminal ready) signal must be asserted before the open call will 
return.

OK, this sounds right, but how do you explain that I can get at the tty
settings with

stty -a < /dev/ttySx

for both of my serial ports, with absolutely nothing connected to them?

;-)

Michel

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Michel Lanners                 |  " Read Philosophy.  Study Art.
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