🚀 go-pugleaf

>In article <1992Nov10.115012.29368@doug.cae.wisc.edu>  writes:
> 
> Friends,
> This may be more UNIX than NeXT, but here goes.
[...]
> But on the Next, it seems much harder.  I simply thought by opening
> a file being /dev/cua, I could check the ports status via feof().
                                                             ^^^^^^
> But alas, it always says theres more data there, and so it continially
> gets hung on reading after the lasst charachter is read.  I tried all 
> sorts of variations with the cable, conecting various permutaions of 
> RTS/CTS and so on, but to no avail.

If you want exact control over the serial lines, don't use buffered
I/O ( fopen,fclose,getchar,feof) but UNIX system calls like open,
write,read and:  ioctl().  This last call will let you set raw/cooked/
cbreak mode, change baud rates, tell write() to treat some parameters
as timers etc.  For more information:  man 4 tty.

(BTW:  Your e-mail bounced)

Marcel