2 Aug
2019
2 Aug
'19
6:45 p.m.
On 8/2/2019 4:35 AM, arnold(a)skeeve.com wrote:
[Subject line changed]
Hi.
Arthur Krewat <krewat(a)kilonet.net>:
Makes a lot of sense. I just fired up my Consensys SVR4.2 VirtualBox
guest, and sure enough, neither the sticky bit, nor setgid work on
directories.
My first commercial experience with UNIX as a consultant was SunOS. I
had worked on Version 6 earlier, but that was purely personal and never
more than messing around with a uVAX a friend had brought home from work.
thanks for the info!
art k.
There's also the setgid bit on directories,
that when files are created,
they will be in the group that the parent directory has on it.
IIRC this was a Sun
invention. It was in SunOS 4.x, and may even have
been in SunOS 3.x.
Also, I don't think it's been
mentioned, but there's the setuid bit on
directories - otherwise known as the sticky bit. When set, even if you
have rights to "write" the directory (meaning, delete files), you can't
delete those owned by other users. Useful for /tmp
Also a SunOS invention, IIRC.
I have no idea what the timeline is for either of
these features :)
Timeline is late 80s, SunOS 4.0, I believe. (Larry? :-)
These ideas later propogated into SVR4 / Solaris, Linux and most (if not all)
the other proprietary Unixes.