(main): New argument -d, for specifying directory.
(usage): Document.
(get_user_id): Compute
(get_home_dir): Deleted.
(get_prefix): New function, taken from main.
(main): Check whether or not we are running setuid. Move prefix
computation to get_prefix. Don't call getpwent; we don't need to
any more. Instead, move it to get_user_id().
(MAX_DATA_LEN, MAX_SCORES): New.
(SCORE_FILE_PREFIX): If HAVE_SHARED_GAME_DIR is not defined,
default to ~/.emacs.d/games.
(get_user_id): Don't zero uid in the case where we can't get the
username.
(lose): New function.
(main): Actually use `max', and default it to MAX_SCORES.
Correctly handle new default for SCORE_FILE_PREFIX. Use `lose'
function.
(read_score): Handle the case of reading unamelen characters, then
finishing. Use mktemp if mkstemp isn't available.
(lock_file, unlock_file): Delete unused versions.
(lock_file): Always sleep, even if we unlinked the lock file.
(get_user_id): Take struct passwd as an argument.
(get_home_dir): New function.
(main): Read in user information here. Discover home directory if
necessary.
(read_score): Trim newline only in `getline' case.
(struct score_entry): Add username field.
(push_score): Use it.
(get_user_id): New function.
(main): Don't malloc excessively.
(main): Use username field.
(read_score): Read it.
(push_score): Handle it.
(write_scores) Write it.
(read_score): Handle arbitrary length data.
