games/snake/snscore/snscore.c

   1 /*-
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#) Copyright (c) 1980, 1993 The Regents of the University of California.  All rights reserved.
  30  * @(#)snscore.c        8.1 (Berkeley) 7/19/93
  31  * $FreeBSD: src/games/snake/snscore/snscore.c,v 1.5 1999/11/30 03:49:42 billf Exp $
  32  * $DragonFly: src/games/snake/snscore/snscore.c,v 1.4 2006/09/03 23:47:56 pavalos Exp $
  33  */
  34
  35 #include <sys/types.h>
  36 #include <err.h>
  37 #include <pwd.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42 #include "pathnames.h"
  43
  44 const char *recfile = _PATH_RAWSCORES;
  45 #define MAXPLAYERS 256
  46
  47 struct  player  {
  48         short   uids;
  49         short   scores;
  50         char    *name;
  51 };
  52
  53 struct player players[MAXPLAYERS], temp;
  54
  55 int
  56 main(int argc __unused, char *argv[] __unused)
  57 {
  58         short   uid, score;
  59         FILE    *fd;
  60         int     noplayers;
  61         int     i, j, notsorted;
  62         short   whoallbest, allbest;
  63         const   char *q;
  64         struct  passwd  *p;
  65
  66         /* Revoke setgid privileges */
  67         setgid(getgid());
  68
  69         fd = fopen(recfile, "r");
  70         if (fd == NULL)
  71                 err(1, "opening `%s'", recfile);
  72         printf("Snake players scores to date\n");
  73         if (fread(&whoallbest, sizeof(short), 1, fd) == 0) {
  74                 printf("No scores recorded yet!\n");
  75                 exit(0);
  76         }
  77         fread(&allbest, sizeof(short), 1, fd);
  78         noplayers = 0;
  79         for (uid = 2; ;uid++) {
  80                 if(fread(&score, sizeof(short), 1, fd) == 0)
  81                         break;
  82                 if (score > 0) {
  83                         if (noplayers >= MAXPLAYERS) {
  84                                 printf("too many players\n");
  85                                 exit(2);
  86                         }
  87                         players[noplayers].uids = uid;
  88                         players[noplayers].scores = score;
  89                         p = getpwuid(uid);
  90                         if (p == NULL)
  91                                 continue;
  92                         q = p -> pw_name;
  93                         players[noplayers].name = strdup(q);
  94                         if (players[noplayers].name == NULL)
  95                                 err(1, NULL);
  96                         noplayers++;
  97                 }
  98         }
  99
 100         /* bubble sort scores */
 101         for (notsorted = 1; notsorted; ) {
 102                 notsorted = 0;
 103                 for (i = 0; i < noplayers - 1; i++)
 104                         if (players[i].scores < players[i + 1].scores) {
 105                                 temp = players[i];
 106                                 players[i] = players[i + 1];
 107                                 players[i + 1] = temp;
 108                                 notsorted++;
 109                         }
 110         }
 111
 112         j = 1;
 113         for (i = 0; i < noplayers; i++) {
 114                 printf("%d:\t$%d\t%s\n", j, players[i].scores, players[i].name);
 115                 if (players[i].scores > players[i + 1].scores)
 116                         j = i + 2;
 117         }
 118         exit(0);
 119 }