Directory where the temporary directory should be created (defaults to the env variable TMPDIR, or the system's default, usually /tmp).

Note that if the passed dir is relative, the path returned by makeTempFile() and makeTempDir() will also be relative. Be mindful of this when changing working directory.

String that should precede the random portion of the temporary directory's name.

String that should follow the random portion of the temporary directory's name.