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Against /tmp

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257 points todsacerdoti | 1 comments | 22 Oct 24 12:36 UTC | HN request time: 0.222s | source
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scottlamb ◴[22 Oct 24 15:25 UTC] No.41915221[source]▶
> There should be per-user temporary directories. In fact, on modern systems there are per-user temporary directories!

On Linux+systemd, I think this is referring to /run/user/$UID. $XDG_RUNTIME_DIR is set to this path in a session by default. There's a spec for that environment variable at <https://specifications.freedesktop.org/basedir-spec/latest/>. I assume there's also some systemd doc talking about this.

On macOS, I see that $TMPDIR points to a path like /var/folders/jd/d94zfh8d1p3bv_q56wmlxn6w0000gq/T/ that appears to be per-user also.

What do FreeBSD/OpenBSD/NetBSD do?

replies(4): >>41916623 #>>41918825 #>>41918913 #>>41919219 #
1. anyfoo ◴[22 Oct 24 21:19 UTC] No.41918825[source]▶
iOS and macOS go further and separate their (native) apps almost entirely, including temporary files. That way, if you download "Super Free VPN Pro!!", it at least doesn't get access to, say, photos, temporary data or not.