10 Jan
2017
10 Jan
'17
10:57 p.m.
On 10 Jan 2017, at 16:20, Joerg Schilling
<schily(a)schily.net> wrote:
Berny Goodheart <berny(a)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
Correct. Sort of. in SVR4 it was defo STREAMS based. But in earlier SVRx versions it was
the BSD stuff.
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
I am not sure on this
so I will agree ;)
> Multi groups/file ownership
> Some system calls
> COFF <=== NO, COFF was from SysV and deprecated in Svr4
I defo have this
one wrong. You are correct.
>
> From SunOS:
> vnodes
> VFS
> VM
> mmap
> LWP and kernel threads
> /proc <=== NO, /proc did not exist in SunOS-4
Yes, it came from Roger at
AT&T
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
I
am prety sure this was from AT&T albeit, it was probably Sun developed.
> RFS
> STREAMS and TLI <=== SVr3 did not have STREAMS
SVR3 defo had STREAMS.
> IPC (Shared memory, Message queues, semaphores)
<=== Already in SunOS-4
But it was in SysV before SunOS-4. Much of Solaris IPC
came from the SysV code together with POSIX IPC and some extras….doors.
Jörg
--
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