Against /Tmp

> The fix, way back when, should have been for login(8) to create a per-user temporary directory in a sensible place before it drops privilege, and set $TMPDIR so the user’s shell and child processes can find it.

Something like

    tmpdir := "/tmp/${USERNAME}"
    loop:
        rmdir(tmpdir, recurse=true)
        while not mkdir(tmpdir, 0o700, must-create=true)
    chown(tmpdir, user=$USERNAME, group=$USERGROUP)
    export("TMPDIR", tmpdir)

with /tmp having root:root owner with 0o775 permissions on it? Yeah, would've been nice.

Why not both, like Windows?

$HOME/.tmp for user operations and /tmp for system operations?

EDIT: I see from other posters it can be done. Why the heck isn't this the default?!

What system operations exist that need temp storage shouldn't have a separate user anyhow?

I see where you're going with your question, but like Windows' Services/scheduled tasks, most of those 'users' don't have a $HOME folder.

Not to say they couldn't have one!