tset (BSD?)

[Doug Gwyn]

In article <4493 at hoptoad.uucp> gnu at hoptoad.uucp (John Gilmore) writes:
>Maybe with streams tty drivers even we binary customers will be able
>to write a little module that will support a second erase character
>and push it onto the stream...

Although streams are good for a lot of transformations like this,
I suspect it would be pretty hard to have a module snatch back data
that it has already passed downstream.  I would think the whole
input canonicalization module would have to be replaced.