Pseudo terminal problems

[Joseph S. D. Yao]

> Our problem stems from how echoing is handled on both  NUNET  and
> UNIX:
> 
> Terminal         Network         Interface          UNIX
>    1 --------------
>                    | 2
>      <-------------
>                    :
>                     ----- 3 ----->   4  ----------->
>                                         <----------- 5
>                     <---- 6 ------
>    7 <-------------

BB&N and/or Perkin-Elmer TCP-IP code do the following:
While in cooked mode, echoing is local (1-2), and remote echoing
(5-6-7) is turned off.  Packets are sent per line.  When in raw/cbreak-
noecho mode, character transmission is single-character-at-a-time.  It
works well.

Joe Yao		hadron!jsdy at seismo.{ARPA,UUCP}