UNIX Family Tree? - (nf)
ajs at hpfcla.UUCP
ajs at hpfcla.UUCP
Sun Jan 8 18:35:00 AEST 1984
#R:dartvax:-55400:hpfcla:43800002:000:1216
hpfcla!ajs Jan 6 18:18:00 1984
Guess what I happened to just have laying around! I hope it answers
your question, and that Mark doesn't mind me posting it.
> From: cbosgd!mark (Mark Horton)
> Date: 22 Jun 83 00:10:09 EDT (Wed)
>
> You asked why at "disappeared" from system III.
>
> At was never in System III or any of its predecessors. System III did
> not descend from V7 - you'll see many V7 features that are not in SIII,
> including mpx, learn, CBREAK, TIOCSETN.
>
> The lineology is (roughly):
>
> 1976 1977 1978 1979 1980 1981 1982 1983
> AT&T -------System III /- System V
> / /
> USG PWB 1.0 -> UNIX/TS 2.0 -> UNIX 3.0 -> 4.0 -> 5.0 -> 6.0
> /
> 127 V6------------> V7
> UCB \ \--------------> 2.8BSD
> \
> 135 -> UNIX/32V
> UCB \-----> 3BSD -> 4BSD
>
> There was considerable cross-migration of V7 features into 2.0, such as
> the Bourne shell and the V7 tty driver (minus CBREAK and TIOCSETN) and
> environments, but not a wholesale pickup of everything. All the PWB
> descendents allow chown to give away files (and thus have a buggy tar
> command).
>
> Mark
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