How do I do it?

[Jonathan Bayer]

In article <3458 at sdsu.UUCP> turtle at sdsu.UUCP (Andrew Scherpbier) writes:
>
>   I have a 386 box running Xenix V 2.3.1.  With this release there are
>a couple of programs which do things which I would like to do as well.
>The programs I am talking about are 'usemouse' and 'mscreen'  Usemouse
>somehow inserts keystrokes between the keyboard and another program.
>This in itself would not be such an accomplishment since a simple filter
>could do that as well, but it seems completely transparent and it uses the
				^^^^^^^^^^^^^^^^^^^^^^^^^^

					Not quite.  See below

>/dev/ttyp* devices somehow.
>   Mscreen also uses the /dev/ttyp* devices and it accomplishes the reverse
>of usemouse: it filters the output from a process and does special things
>when certain escape sequences come through.
>
>   Here is the big question:
>
>   How can I write a program to do this same sort of thing? -and- What are
>these /dev/ttyp* things anyway?
>


First, the usemouse is almost transparent.  However, since it is sitting
between the program and the tty the ioctl's get a little messed up. 
Specifically, I wanted to use uEmacs with a mouse.  Unfortunately, when
usemouse was running most of my function keys didn't work because the
tty settings weren't being passed through.

Second, the /dev/ttyp* are pseudo ttys.  This means that you can use
them as virtual terminals which programs can talk to.  

Finally, you will need the 2.3 developement system to be able to access
the mouse devices. :-(

Mscreen lets you get multiscreens on serial terminals, similar to the
console.  It works best on terminals that have several pages of memory.


JB
-- 
Jonathan Bayer			      Beware: The light at the end of the
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