Greetings, Norman Shapiro!
> Here is my problem. There is an old laptop running Windows XP. It has a
> female "printer port", which I understand is also known as a "parallel
> port".
Yup.
> There is a male 25 pin to female 9 pin adapter that fits the female port.
Nop. This is likely a SERIAL (Also known as "COM") PORT 9<->25 pin adapter.
> The 9 pin end will eventually be connected to a serial device.
You can't connect serial devices to a printer port. Unless you want to damage
either, or both of them.
> I want to send characters to the serial device, from a C program.
> Can I just open("/cygdrive/c/prn", ...)?
First off, why you're trying to open "prn" file from C: drive?
> Can I use tcsetattr on the resulting file descriptor?
--
WBR,
Andrey Repin ([email protected]) 11.02.2013, <07:40>
Sorry for my terrible english...
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