echoing style - DOS,VMS vs. Unix (was: AT&T Joining OSF)

[Doug Gwyn]

In article <397 at nynex1.UUCP> curt at chaos.UUCP (Curtis Villamizar) writes:
>Does anyone know if line diciplines are obsolete and replaced by
>streams stuff?

Streams started out as "stackable line disciplines".  To replace a line
discipline, one would pop the old one and push a new one.  Thus, in
theory streams is a generalization that replaces the old notion of line
disciplines.  However, for purposes of compatibility, the terminal
handler streams module may still support the old method internally.

One might think that each orthogonal terminal handler feature would be
controlled by a separate streams module, but that's not how it has been
implemented.  So to change echo behavior you'd have to provide a whole
alternative terminal handler module.