games/atc/log.c

   1 /*-
   2  * Copyright (c) 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Ed James.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)log.c    8.1 (Berkeley) 5/31/93
  37  * $FreeBSD: src/games/atc/log.c,v 1.7 1999/11/30 03:48:20 billf Exp $
  38  * $DragonFly: src/games/atc/log.c,v 1.3 2006/08/08 15:03:02 pavalos Exp $
  39  */
  40
  41 /*
  42  * Copyright (c) 1987 by Ed James, UC Berkeley.  All rights reserved.
  43  *
  44  * Copy permission is hereby granted provided that this notice is
  45  * retained on all partial or complete copies.
  46  *
  47  * For more info on this and all of my stuff, mail edjames@berkeley.edu.
  48  */
  49
  50 #include <sys/stat.h>
  51 #include <err.h>
  52
  53 #include "include.h"
  54 #include "pathnames.h"
  55
  56 #ifdef SYSV
  57 #include <sys/utsname.h>
  58 #endif
  59
  60 static FILE *score_fp;
  61
  62 static int      compar(const void *, const void *);
  63 static const char       *timestr(int);
  64
  65
  66 static int
  67 compar(const void *va, const void *vb)
  68 {
  69         const SCORE     *a, *b;
  70
  71         a = (const SCORE *)va;
  72         b = (const SCORE *)vb;
  73
  74         if (b->planes == a->planes)
  75                 return (b->time - a->time);
  76         else
  77                 return (b->planes - a->planes);
  78 }
  79
  80 #define SECAMIN         60
  81 #define MINAHOUR        60
  82 #define HOURADAY        24
  83 #define SECAHOUR        (SECAMIN * MINAHOUR)
  84 #define SECADAY         (SECAHOUR * HOURADAY)
  85 #define DAY(t)          ((t) / SECADAY)
  86 #define HOUR(t)         (((t) % SECADAY) / SECAHOUR)
  87 #define MIN(t)          (((t) % SECAHOUR) / SECAMIN)
  88 #define SEC(t)          ((t) % SECAMIN)
  89
  90 static const char *
  91 timestr(int t)
  92 {
  93         static char     s[80];
  94
  95         if (DAY(t) > 0)
  96                 (void)sprintf(s, "%dd+%02dhrs", DAY(t), HOUR(t));
  97         else if (HOUR(t) > 0)
  98                 (void)sprintf(s, "%d:%02d:%02d", HOUR(t), MIN(t), SEC(t));
  99         else if (MIN(t) > 0)
 100                 (void)sprintf(s, "%d:%02d", MIN(t), SEC(t));
 101         else if (SEC(t) > 0)
 102                 (void)sprintf(s, ":%02d", SEC(t));
 103         else
 104                 *s = '\0';
 105
 106         return (s);
 107 }
 108
 109 void
 110 open_score_file(void)
 111 {
 112         mode_t old_mask;
 113         int score_fd;
 114         int flags;
 115
 116         old_mask = umask(0);
 117         score_fd = open(_PATH_SCORE, O_CREAT|O_RDWR, 0664);
 118         umask(old_mask);
 119         if (score_fd < 0) {
 120                 warn("open %s", _PATH_SCORE);
 121                 return;
 122         }
 123         /* Set the close-on-exec flag.  If this fails for any reason, quit
 124          * rather than leave the score file open to tampering.  */
 125         flags = fcntl(score_fd, F_GETFD);
 126         if (flags < 0)
 127                 err(1, "fcntl F_GETFD");
 128         flags |= FD_CLOEXEC;
 129         if (fcntl(score_fd, F_SETFD, flags) == -1)
 130                 err(1, "fcntl F_SETFD");
 131         /*
 132          * This is done to take advantage of stdio, while still
 133          * allowing a O_CREAT during the open(2) of the log file.
 134          */
 135         score_fp = fdopen(score_fd, "r+");
 136         if (score_fp == NULL) {
 137                 warn("fdopen %s", _PATH_SCORE);
 138                 return;
 139         }
 140 }
 141
 142 int
 143 log_score(int list_em)
 144 {
 145         int             i, num_scores = 0, good, changed = 0, found = 0;
 146         struct passwd   *pw;
 147         char            *cp;
 148         SCORE           score[100], thisscore;
 149 #ifdef SYSV
 150         struct utsname  name;
 151 #endif
 152
 153         if (score_fp == NULL) {
 154                 warnx("no score file available");
 155                 return (-1);
 156         }
 157
 158 #ifdef BSD
 159         if (flock(fileno(score_fp), LOCK_EX) < 0)
 160 #endif
 161 #ifdef SYSV
 162         while (lockf(fileno(score_fp), F_LOCK, 1) < 0)
 163 #endif
 164         {
 165                 warn("flock %s", _PATH_SCORE);
 166                 return (-1);
 167         }
 168         for (;;) {
 169                 good = fscanf(score_fp, SCORE_SCANF_FMT,
 170                         score[num_scores].name,
 171                         score[num_scores].host,
 172                         score[num_scores].game,
 173                         &score[num_scores].planes,
 174                         &score[num_scores].time,
 175                         &score[num_scores].real_time);
 176                 if (good != 6 || ++num_scores >= NUM_SCORES)
 177                         break;
 178         }
 179         if (!test_mode && !list_em) {
 180                 if ((pw = (struct passwd *) getpwuid(getuid())) == NULL) {
 181                         fprintf(stderr,
 182                                 "getpwuid failed for uid %d.  Who are you?\n",
 183                                 (int)getuid());
 184                         return (-1);
 185                 }
 186                 strcpy(thisscore.name, pw->pw_name);
 187 #ifdef BSD
 188                 if (gethostname(thisscore.host, sizeof (thisscore.host)) < 0) {
 189                         perror("gethostname");
 190                         return (-1);
 191                 }
 192 #endif
 193 #ifdef SYSV
 194                 uname(&name);
 195                 strcpy(thisscore.host, name.nodename);
 196 #endif
 197
 198                 cp = rindex(filename, '/');
 199                 if (cp == NULL) {
 200                         fprintf(stderr, "log: where's the '/' in %s?\n", filename);
 201                         return (-1);
 202                 }
 203                 cp++;
 204                 strcpy(thisscore.game, cp);
 205
 206                 thisscore.time = clck;
 207                 thisscore.planes = safe_planes;
 208                 thisscore.real_time = time(0) - start_time;
 209
 210                 for (i = 0; i < num_scores; i++) {
 211                         if (strcmp(thisscore.name, score[i].name) == 0 &&
 212                             strcmp(thisscore.host, score[i].host) == 0 &&
 213                             strcmp(thisscore.game, score[i].game) == 0) {
 214                                 if (thisscore.time > score[i].time) {
 215                                         score[i].time = thisscore.time;
 216                                         score[i].planes = thisscore.planes;
 217                                         score[i].real_time =
 218                                                 thisscore.real_time;
 219                                         changed++;
 220                                 }
 221                                 found++;
 222                                 break;
 223                         }
 224                 }
 225                 if (!found) {
 226                         for (i = 0; i < num_scores; i++) {
 227                                 if (thisscore.time > score[i].time) {
 228                                         if (num_scores < NUM_SCORES)
 229                                                 num_scores++;
 230                                         bcopy(&score[i],
 231                                                 &score[num_scores - 1],
 232                                                 sizeof (score[i]));
 233                                         bcopy(&thisscore, &score[i],
 234                                                 sizeof (score[i]));
 235                                         changed++;
 236                                         break;
 237                                 }
 238                         }
 239                 }
 240                 if (!found && !changed && num_scores < NUM_SCORES) {
 241                         bcopy(&thisscore, &score[num_scores],
 242                                 sizeof (score[num_scores]));
 243                         num_scores++;
 244                         changed++;
 245                 }
 246
 247                 if (changed) {
 248                         if (found)
 249                                 puts("You beat your previous score!");
 250                         else
 251                                 puts("You made the top players list!");
 252                         qsort(score, num_scores, sizeof (*score), compar);
 253                         rewind(score_fp);
 254                         for (i = 0; i < num_scores; i++)
 255                                 fprintf(score_fp, "%s %s %s %d %d %d\n",
 256                                         score[i].name, score[i].host,
 257                                         score[i].game, score[i].planes,
 258                                         score[i].time, score[i].real_time);
 259                 fflush(score_fp);
 260                 if (ferror(score_fp))
 261                         warn("error writing %s", _PATH_SCORE);
 262                 /* It is just possible that updating an entry could
 263                  * have reduced the length of the file, so we
 264                  * truncate it.  The lseek is required for stream/fd
 265                  * synchronisation by POSIX.1.  */
 266                 lseek(fileno(score_fp), 0, SEEK_END);
 267                 ftruncate(fileno(score_fp), ftell(score_fp));
 268                 } else {
 269                         if (found)
 270                                 puts("You didn't beat your previous score.");
 271                         else
 272                                 puts("You didn't make the top players list.");
 273                 }
 274                 putchar('\n');
 275         }
 276 #ifdef BSD
 277         flock(fileno(score_fp), LOCK_UN);
 278 #endif
 279 #ifdef SYSV
 280         /* lock will evaporate upon close */
 281 #endif
 282         fclose(score_fp);
 283         printf("%2s:  %-8s  %-8s  %-18s  %4s  %9s  %4s\n", "#", "name", "host",
 284                 "game", "time", "real time", "planes safe");
 285         puts("-------------------------------------------------------------------------------");
 286         for (i = 0; i < num_scores; i++) {
 287                 cp = index(score[i].host, '.');
 288                 if (cp != NULL)
 289                         *cp = '\0';
 290                 printf("%2d:  %-8s  %-8s  %-18s  %4d  %9s  %4d\n", i + 1,
 291                         score[i].name, score[i].host, score[i].game,
 292                         score[i].time, timestr(score[i].real_time),
 293                         score[i].planes);
 294         }
 295         putchar('\n');
 296         return (0);
 297 }