[TUHS] Unix quix

[Clem Cole]

👍

On Wed, Jan 22, 2020 at 6:35 PM Warner Losh <imp at bsdimp.com> wrote:

>
>
> On Wed, Jan 22, 2020 at 1:42 PM Clem Cole <clemc at ccc.com> wrote:
>
>> BTW: There is another hint in CAC 155/RFC 681.  The line on page 2 that
>> reads: "since the user is allowed only sixteen open files."   My memory
>> is V6 allowed more than 16, over 20 is my memory; but we would have to look
>> at the structure to see what it is defined as.
>>
>
> Looking at the source in the archives for V5, we see that param.h has "#define
> NOFILE  15" and for V6 we see "#define NOFILE 15 /* max open files per
> process */". V7 has "#define NOFILE 20 /* max open files per process */"
> though, so maybe you are thinking of V7 bumping the limit to 20? Or maybe
> it was a local change for MIT, since param.h could be edited... But in any
> event, I think this means that the CAC 155 reference to 16 files just means
> V6 or earlier.
>
> However, I just noticed there's more direct evidence for it being based on
> V5. On page 2 of CAC 155 we see
>
> "For further information concerning the different I/O calls the reader is
> directed to The UNIX Programmer's Manual, fifth edition, K. Thompson and D.
> M. Ritchie, June 1974."
>
> BTW, CAC 155 is the PDF we have linked from the early network page. I
> hadn't noticed before now, but seeing the missing page refreshes my
> recollection.
>
> Warner
>
-- 
Sent from a handheld expect more typos than usual
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://minnie.tuhs.org/pipermail/tuhs/attachments/20200122/e27f474e/attachment.html>