On Mon, Jul 18, 2022 at 8:18 AM Edward Welbourne <edward.welbou...@qt.io> wrote:
> Alejandro Colomar (Monday, July 18, 2022 14:07)
> > MacOS seems to be setting TMPDIR (or at least some script run at
> > startup seems to be setting it in my system), and it's set to something
> > really weird that I don't trust will exist after reboot.
> Then I think the way you're using tmpdir doesn't match its usual
> semantics, namely that it's exactly a directory that's routinely blown
> away and recreated, at least as often as boot-time and ideally more
> often.  If what you need is a place to store (even semi-) persistent
> state for a program, that should survive reboots, then you want
> $prefix/var/, not /tmp/ (which may well be a tmpfs partition, indeed).

I believe MacOS maps /etc and /tmp to a private area for the user.
They are not world readable/writable. I believe Apple did it for

Here's from a MacOS X 10.5 machine I have:

    $ ls -l /etc /tmp
    lrwxr-xr-x@ 1 root  wheel  11 Feb 10  2015 /etc -> private/etc
    lrwxr-xr-x@ 1 root  wheel  11 Feb 10  2015 /tmp -> private/tmp


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