The old saw that I wish I had said "great men stand on the shoulders of greater men, computer scientist like to step on their toes."

The problem I have with this sort of accounting is it leaves out where different groups took these ideas and integrated them.  Others that come later loss that history.  For instance ip/tcp came from bbn, /proc came from research, job control    came from MIT, fsck from CMU etc.   

Sent from my PDP-7 Running UNIX V0 expect things to be almost but not quite. 

> On Jan 10, 2017, at 8:20 AM, Joerg Schilling <schily at schily.net> wrote:
> 
> Berny Goodheart <berny at berwynlodge.com> wrote:
> 
>> Here???s the breakdown of SVR4 kernel lineage as I recall it. I am pretty sure this is correct. But I am sure many of you will put me right if I am wrong ;)
>> 
>> From BSD:
>> TCP/IP            <=== NO, Svr4 uses a STREAMS based TCP/IP stack
>> C Shell
>> Sockets            <=== NO, BSD has sockets in kernel, SVr4 in
>                    userland
>> Process groups and job Control
>> Some signals
>> FFS in UFS guise        <=== NO, rather taken from SunOS-4
>> Multi groups/file ownership
>> Some system calls
>> COFF                <=== NO, COFF was from SysV and deprecated in Svr4
>> 
>> From SunOS:
>> vnodes
>> VFS
>> VM
>> mmap
>> LWP and kernel threads
>> /proc                <=== NO, /proc did not exist in SunOS-4
>> Dynamic linking extensions
>> NFS
>> RPC
>> XDR
>> 
>> From SVR3:
>> .so libs            <=== What should this be?
>                    I am not even sure whether SVr4 included
>                    backwards compatibility for the SVr3
>                    "installed" shared libraries.
> 
>> revamped signals and trampoline code +++++sigset() was not in SVr2, I believe 
>                        it was not available in svr3 as 
>                        well and rather invented for 
>                        Svr4
>> VFSSW                <=== NO, this is from SunOS-4
>> RFS
>> STREAMS and TLI        <=== SVr3 did not have STREAMS
>> IPC (Shared memory, Message queues, semaphores) <=== Already in SunOS-4
> 
> Jörg
> 
> -- 
> EMail:joerg at schily.net                  (home) Jörg Schilling D-13353 Berlin
>       joerg.schilling at fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/
> URL:  http://cdrecord.org/private/ http://sourceforge.net/projects/schilytools/files/