SVR3.0 vs BSD4.3

[Larry McVoy]

In article <445 at vsi.UUCP> friedl at vsi.UUCP (Stephen J. Friedl) writes:
>Shell layers do not involve any kind of signals.  When ^Z is hit,
>the sxt driver gives control back to channel zero, which is
>usually the layer manager (here, /usr/bin/shl).  When a user

Which means you could emulate shell layers with pty's.  All that is going is
the master side has several slave sides and switches between them.  It is 
a far cry from job control.
-- 

Larry McVoy	lm at arizona.edu or ...!{uwvax,sun}!arizona.edu!lm