al_make_temp_file - Allegro 5 API
ALLEGRO_FILE *al_make_temp_file(const char *template, ALLEGRO_PATH **ret_path)
Make a temporary randomly named file given a filename `template'.
`template' is a string giving the format of the generated filename and should
include one or more capital Xs. The Xs are replaced with random alphanumeric
characters. There should be no path separators.
If `ret_path' is not NULL, the address it points to will be set to point to a
new path structure with the name of the temporary file.
Returns the opened ALLEGRO_FILE(3) on success, NULL on failure.