games/snake/snscore/snscore.c

   1 /*      $NetBSD: snscore.c,v 1.19 2012/06/19 05:46:09 dholland Exp $    */
   2
   3 /*
   4  * Copyright (c) 1980, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\
  35  The Regents of the University of California.  All rights reserved.");
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "@(#)snscore.c   8.1 (Berkeley) 7/19/93";
  41 #else
  42 __RCSID("$NetBSD: snscore.c,v 1.19 2012/06/19 05:46:09 dholland Exp $");
  43 #endif
  44 #endif /* not lint */
  45
  46 #include <sys/types.h>
  47 #include <err.h>
  48 #include <pwd.h>
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <unistd.h>
  53 #include "pathnames.h"
  54
  55 static const char *recfile = _PATH_RAWSCORES;
  56 #define MAXPLAYERS 256
  57
  58 struct  player  {
  59         short   uids;
  60         short   scores;
  61         char    *name;
  62 };
  63
  64 static struct player players[MAXPLAYERS], temp;
  65
  66 int     main(void);
  67
  68 int
  69 main(void)
  70 {
  71         short   uid, score;
  72         FILE    *fd;
  73         int     noplayers;
  74         int     i, j, notsorted;
  75         short   whoallbest, allbest;
  76         const   char *q;
  77         struct  passwd  *p;
  78
  79         /* Revoke setgid privileges */
  80         setgid(getgid());
  81
  82         fd = fopen(recfile, "r");
  83         if (fd == NULL)
  84                 err(1, "opening `%s'", recfile);
  85         printf("Snake players scores to date\n");
  86         if (fread(&whoallbest, sizeof(short), 1, fd) == 0) {
  87                 printf("No scores recorded yet!\n");
  88                 exit(0);
  89         }
  90         fread(&allbest, sizeof(short), 1, fd);
  91         noplayers = 0;
  92         for (uid = 2; ;uid++) {
  93                 if(fread(&score, sizeof(short), 1, fd) == 0)
  94                         break;
  95                 if (score > 0) {
  96                         if (noplayers >= MAXPLAYERS) {
  97                                 printf("too many players\n");
  98                                 exit(2);
  99                         }
 100                         players[noplayers].uids = uid;
 101                         players[noplayers].scores = score;
 102                         p = getpwuid(uid);
 103                         if (p == NULL)
 104                                 continue;
 105                         q = p -> pw_name;
 106                         players[noplayers].name = strdup(q);
 107                         if (players[noplayers].name == NULL)
 108                                 err(1, NULL);
 109                         noplayers++;
 110                 }
 111         }
 112
 113         /* bubble sort scores */
 114         for (notsorted = 1; notsorted; ) {
 115                 notsorted = 0;
 116                 for (i = 0; i < noplayers - 1; i++)
 117                         if (players[i].scores < players[i + 1].scores) {
 118                                 temp = players[i];
 119                                 players[i] = players[i + 1];
 120                                 players[i + 1] = temp;
 121                                 notsorted++;
 122                         }
 123         }
 124
 125         j = 1;
 126         for (i = 0; i < noplayers; i++) {
 127                 printf("%d:\t$%d\t%s\n", j, players[i].scores, players[i].name);
 128                 if (players[i].scores > players[i + 1].scores)
 129                         j = i + 2;
 130         }
 131         exit(0);
 132 }