Re: many packages write to `temporary-file-directory' insecurely

[Richard Stallman]

    > One way to solve this problem is by having Emacs installation create
    > the desired files under /var/games/emacs, make them world-writable,
    > and make /var/games/emacs read-only.

    The problem I see with this is that we can't use `rename-file', and thus
    we lose atomicity of score file updates.  If multiple users are
    concurrently reading and writing the same file, it will eventually be
    corrupted.

You are right.

How do other game programs handle this?