On Thu, Jun 27, 2024 at 8:02 AM Peter Yardley
<peter.martin.yardley@gmail.com> wrote:
> OSX is Mach which has a BSD emulation layer. And BSD injected into the kernel.
>
> It doesn’t claim to be UNIX.
Not true! It does: macOS is actually certified and registered as Unix.
It's my understanding that Apple paid a fair bit of money to make that
happen: https://www.opengroup.org/openbrand/register/
Indeed (can't authoritatively speak to the cost). FreeBSD has started getting a trickle of fixes to cope with the test suite compliance. Some are very test suite specific like checking to make sure argv[0] != NULL in some weird programs... some fix real problems though..
Warner
- Dan C.
> > On 27 Jun 2024, at 1:29 PM, ron minnich <rminnich@gmail.com> wrote:
> >
> > I have a directory, t:
> > ronsexcllentmbp:t rminnich$ ls -li
> > total 0
> > 23801442 -rw-r--r-- 1 rminnich wheel 0 Jun 26 20:21 a
> > 23801443 -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 b
> > 23801443 -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 c
> >
> > note that b and c are the same inode.
> >
> > let's make a cpio.
> >
> > ronsexcllentmbp:t rminnich$ cpio -o >../t.cpio
> > a
> > b
> > c
> > ^D
> > 1 block
> >
> > what's in it?
> > ronsexcllentmbp:t rminnich$ cpio -ivt < ../t.cpio
> > -rw-r--r-- 1 rminnich wheel 0 Jun 26 20:21 a
> > -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 b
> > -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 c link to b
> >
> > "c link to b"? wtf? Who thought that was a good idea? because ...
> > ronsexcllentmbp:t rminnich$ touch 'c link to b'
> > ronsexcllentmbp:t rminnich$ ls -l
> > total 0
> > -rw-r--r-- 1 rminnich wheel 0 Jun 26 20:21 a
> > -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 b
> > -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 c
> > -rw-r--r-- 1 rminnich wheel 0 Jun 26 20:22 c link to b
> >
> > and
> > ronsexcllentmbp:t rminnich$ cpio -o >../t.cpio
> > a
> > b
> > c
> > c link to b
> > ^D
> >
> > ronsexcllentmbp:t rminnich$ cpio -ivt < ../t.cpio
> > -rw-r--r-- 1 rminnich wheel 0 Jun 26 20:21 a
> > -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 b
> > -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 c link to b
> > -rw-r--r-- 1 rminnich wheel 0 Jun 26 20:22 c link to b
> >
> > so ... it looks like a file is there twice, because somebody thought it was a good idea to confuse a file name and file metadata. And, anyway, it's just as accurate to have it say
> > -rw-r--r-- 1 rminnich wheel 0 Jun 26 20:21 a
> > -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 b link to c
> > -rw-r--r-- 2 rminnich wheel 0 Jun 26 20:21 c link to b
> > -rw-r--r-- 1 rminnich wheel 0 Jun 26 20:22 c link to b
> > Right? :-)
> >
> > From the same people who brought you this:
> > ronsexcllentmbp:t rminnich$ bc
> > >>>
> >
> > Somebody needs to get the osx folks a unix manual set :-)
>
> Peter Yardley
> peter.martin.yardley@gmail.com
>