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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1980, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)snscore.c        8.1 (Berkeley) 7/19/93
  35  * $FreeBSD: src/games/snake/snscore/snscore.c,v 1.5 1999/11/30 03:49:42 billf Exp $
  36  * $DragonFly: src/games/snake/snscore/snscore.c,v 1.4 2006/09/03 23:47:56 pavalos Exp $
  37  */
  38
  39 #include <sys/types.h>
  40 #include <err.h>
  41 #include <pwd.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <unistd.h>
  46 #include "pathnames.h"
  47
  48 const char *recfile = _PATH_RAWSCORES;
  49 #define MAXPLAYERS 256
  50
  51 struct  player  {
  52         short   uids;
  53         short   scores;
  54         char    *name;
  55 } players[MAXPLAYERS], temp;
  56
  57 int
  58 main(void)
  59 {
  60         short   uid, score;
  61         FILE    *fd;
  62         int     noplayers;
  63         int     i, j, notsorted;
  64         short   whoallbest, allbest;
  65         const   char *q;
  66         struct  passwd  *p;
  67
  68         /* Revoke setgid privileges */
  69         setgid(getgid());
  70
  71         fd = fopen(recfile, "r");
  72         if (fd == NULL)
  73                 err(1, "opening `%s'", recfile);
  74         printf("Snake players scores to date\n");
  75         if (fread(&whoallbest, sizeof(short), 1, fd) == 0) {
  76                 printf("No scores recorded yet!\n");
  77                 exit(0);
  78         }
  79         fread(&allbest, sizeof(short), 1, fd);
  80         noplayers = 0;
  81         for (uid = 2; ;uid++) {
  82                 if(fread(&score, sizeof(short), 1, fd) == 0)
  83                         break;
  84                 if (score > 0) {
  85                         if (noplayers >= MAXPLAYERS) {
  86                                 printf("too many players\n");
  87                                 exit(2);
  88                         }
  89                         players[noplayers].uids = uid;
  90                         players[noplayers].scores = score;
  91                         p = getpwuid(uid);
  92                         if (p == NULL)
  93                                 continue;
  94                         q = p -> pw_name;
  95                         players[noplayers].name = strdup(q);
  96                         if (players[noplayers].name == NULL)
  97                                 err(1, NULL);
  98                         noplayers++;
  99                 }
 100         }
 101
 102         /* bubble sort scores */
 103         for (notsorted = 1; notsorted; ) {
 104                 notsorted = 0;
 105                 for (i = 0; i < noplayers - 1; i++)
 106                         if (players[i].scores < players[i + 1].scores) {
 107                                 temp = players[i];
 108                                 players[i] = players[i + 1];
 109                                 players[i + 1] = temp;
 110                                 notsorted++;
 111                         }
 112         }
 113
 114         j = 1;
 115         for (i = 0; i < noplayers; i++) {
 116                 printf("%d:\t$%d\t%s\n", j, players[i].scores, players[i].name);
 117                 if (players[i].scores > players[i + 1].scores)
 118                         j = i + 2;
 119         }
 120         exit(0);
 121 }