Any handshake in any port.

[karron at MCIRPS2.MED.NYU.EDU]

I was installing a printer, and I wanted hardware handshaking on /dev/ttyf3.

I used the default sys admin tools but the port was dropping characters.

I tested the port with kermit. If the handshaking was not engaged, then
kermit would not open the port. Kermit did open the port, and so did cat.

What is going on ? I have had problems using handshaking prior, and had to
settle for no handshaking from the ttyd* ports.

Here is the results from cat.
Utest is a file consisting only of a stream of U's to try to overrun the
handshaking (and see if it is working. A U is an alternating bit pattern,
and any errors will cause the alignment of 70 U' accross the page to break up)

 155 Utest
mcirps2:karron:mcirps2:ttyq4:/usr/spool/lp/D.Local:212cat Utest > /dev/ttyf3
cat: output error (-1/8192 characters written)
No such device or address
mcirps2:karron:mcirps2:ttyq4:/usr/spool/lp/D.Local:213cat Utest > /dev/ttym3
cat: output error (-1/8192 characters written)
No such device or address
mcirps2:karron:mcirps2:ttyq4:/usr/spool/lp/D.Local:214cat Utest > /dev/ttyd3
+-----------------------------------------------------------------------------+
| karron at nyu.edu                          Dan Karron                          |
| . . . . . . . . . . . . . .             New York University Medical Center  |
| 560 First Avenue           \ \    Pager <1> (212) 397 9330                  |
| New York, New York 10016    \**\        <2> 10896   <3> <your-number-here>  |
| (212) 340 5210               \**\__________________________________________ |
+-----------------------------------------------------------------------------+