[TUHS] [COFF] Will someone please explain the history and usage of gpasswd / newgrp / sg?

[Warner Losh]

Yes. V7 had chgrp too. It dealt only with adjusting the group "ownership"
of a file.

Warner

On Mon, Nov 15, 2021 at 11:52 AM Clem Cole <clemc at ccc.com> wrote:

> 3BSD has the V7 scheme, the new kernel code where there is a group list in
> the process is not introduced until later/
> ᐧ
>
> On Mon, Nov 15, 2021 at 1:46 PM Henry Bent <henry.r.bent at gmail.com> wrote:
>
>> On Mon, 15 Nov 2021 at 13:31, Clem Cole <clemc at ccc.com> wrote:
>>
>>> Grant,
>>>
>>> Mashey and crew basically did most of the original group work as part of
>>> PWB.   If you look at the Sixth Edition sources and the PWB 1.0 stuff, that
>>> is one of the places you will find differences.  With Seventh Edition (or I
>>> believe as part of the UNIX/TS work that Ken picked up), the Mashey group
>>> changes went back into the Research stream. With one of the predecessors to
>>> 4.2BSD (it may have 4.1A or 4.1B but frankly I have forgotten) Joy
>>> introduced the group scheme we all use today.
>>>
>>>
>> Looking at the TUHS archives, unless I'm missing something, 3BSD has
>> groups that appear to be in the modern format:
>>
>> % ls -l /bsd/3bsd/etc/group
>> -r--r--r-- 1 root root 44 1980-01-02 22:08 /bsd/3bsd/etc/group
>> % cat /bsd/3bsd/etc/group
>> staff:*:10:bill,ozalp
>> grad:*:20:
>> prof:*:30:
>> % find . -name 'chgrp*' | xargs ls -l
>> -r-xr-xr-x 1 root root 6960 Dec 30  1979 ./usr/bin/chgrp
>> -r--r--r-- 1 root root   26 Feb 12  1979 ./usr/man/man1/chgrp.1
>> -r--r--r-- 1 root root  754 Feb 12  1979 ./usr/src/cmd/chgrp.c
>>
>> -Henry
>>
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