/*      $NetBSD: snscore.c,v 1.20 2021/05/12 15:26:44 kre Exp $ */

/*
 * Copyright (c) 1980, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
 The Regents of the University of California.  All rights reserved.");
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)snscore.c   8.1 (Berkeley) 7/19/93";
#else
__RCSID("$NetBSD: snscore.c,v 1.20 2021/05/12 15:26:44 kre Exp $");
#endif
#endif /* not lint */

#include <sys/types.h>
#include <err.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "pathnames.h"

static const char *recfile = SNAKE_PATH_RAWSCORES;
#define MAXPLAYERS 256

struct  player  {
        short   uids;
        short   scores;
        char    *name;
};

static struct player players[MAXPLAYERS], temp;

int     main(void);

int
main(void)
{
        short   uid, score;
        FILE    *fd;
        int     noplayers;
        int     i, j, notsorted;
        short   whoallbest, allbest;
        const   char *q;
        struct  passwd  *p;

        /* Revoke setgid privileges */
        setgid(getgid());

        fd = fopen(recfile, "r");
        if (fd == NULL)
                err(1, "opening `%s'", recfile);
        printf("Snake players scores to date\n");
        if (fread(&whoallbest, sizeof(short), 1, fd) == 0) {
                printf("No scores recorded yet!\n");
                exit(0);
        }
        fread(&allbest, sizeof(short), 1, fd);
        noplayers = 0;
        for (uid = 2; ;uid++) {
                if(fread(&score, sizeof(short), 1, fd) == 0)
                        break;
                if (score > 0) {
                        if (noplayers >= MAXPLAYERS) {
                                printf("too many players\n");
                                exit(2);
                        }
                        players[noplayers].uids = uid;
                        players[noplayers].scores = score;
                        p = getpwuid(uid);
                        if (p == NULL)
                                continue;
                        q = p -> pw_name;
                        players[noplayers].name = strdup(q);
                        if (players[noplayers].name == NULL)
                                err(1, NULL);
                        noplayers++;
                }
        }

        /* bubble sort scores */
        for (notsorted = 1; notsorted; ) {
                notsorted = 0;
                for (i = 0; i < noplayers - 1; i++)
                        if (players[i].scores < players[i + 1].scores) {
                                temp = players[i];
                                players[i] = players[i + 1];
                                players[i + 1] = temp;
                                notsorted++;
                        }
        }

        j = 1;
        for (i = 0; i < noplayers; i++) {
                printf("%d:\t$%d\t%s\n", j, players[i].scores, players[i].name);
                if (players[i].scores > players[i + 1].scores)
                        j = i + 2;
        }
        exit(0);
}