atc/log.c

   1 /*      $NetBSD: log.c,v 1.17 2005/08/10 19:21:21 rpaulo Exp $  */
   2
   3 /*-
   4  * Copyright (c) 1990, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Ed James.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 /*
  36  * Copyright (c) 1987 by Ed James, UC Berkeley.  All rights reserved.
  37  *
  38  * Copy permission is hereby granted provided that this notice is
  39  * retained on all partial or complete copies.
  40  *
  41  * For more info on this and all of my stuff, mail edjames@berkeley.edu.
  42  */
  43
  44 #include <sys/cdefs.h>
  45 #ifndef lint
  46 #if 0
  47 static char sccsid[] = "@(#)log.c       8.1 (Berkeley) 5/31/93";
  48 #else
  49 __RCSID("$NetBSD: log.c,v 1.17 2005/08/10 19:21:21 rpaulo Exp $");
  50 #endif
  51 #endif /* not lint */
  52
  53 #include "include.h"
  54 #include "pathnames.h"
  55
  56 static FILE *score_fp;
  57
  58 int
  59 compar(const void *va, const void *vb)
  60 {
  61         const SCORE     *a, *b;
  62
  63         a = (const SCORE *)va;
  64         b = (const SCORE *)vb;
  65         if (b->planes == a->planes)
  66                 return (b->time - a->time);
  67         else
  68                 return (b->planes - a->planes);
  69 }
  70
  71 #define SECAMIN         60
  72 #define MINAHOUR        60
  73 #define HOURADAY        24
  74 #define SECAHOUR        (SECAMIN * MINAHOUR)
  75 #define SECADAY         (SECAHOUR * HOURADAY)
  76 #define DAY(t)          ((t) / SECADAY)
  77 #define HOUR(t)         (((t) % SECADAY) / SECAHOUR)
  78 #define MIN(t)          (((t) % SECAHOUR) / SECAMIN)
  79 #define SEC(t)          ((t) % SECAMIN)
  80
  81 const char *
  82 timestr(int t)
  83 {
  84         static char     s[80];
  85
  86         if (DAY(t) > 0)
  87                 (void)sprintf(s, "%dd+%02dhrs", DAY(t), HOUR(t));
  88         else if (HOUR(t) > 0)
  89                 (void)sprintf(s, "%d:%02d:%02d", HOUR(t), MIN(t), SEC(t));
  90         else if (MIN(t) > 0)
  91                 (void)sprintf(s, "%d:%02d", MIN(t), SEC(t));
  92         else if (SEC(t) > 0)
  93                 (void)sprintf(s, ":%02d", SEC(t));
  94         else
  95                 *s = '\0';
  96
  97         return (s);
  98 }
  99
 100 void
 101 open_score_file(void)
 102 {
 103         mode_t old_mask;
 104         int score_fd;
 105         int flags;
 106
 107         old_mask = umask(0);
 108         score_fd = open(_PATH_SCORE, O_CREAT|O_RDWR, 0664);
 109         (void)umask(old_mask);
 110         if (score_fd < 0) {
 111                 warn("open %s", _PATH_SCORE);
 112                 return;
 113         }
 114         if (score_fd < 3)
 115                 exit(1);
 116         /* Set the close-on-exec flag.  If this fails for any reason, quit
 117          * rather than leave the score file open to tampering.  */
 118         flags = fcntl(score_fd, F_GETFD);
 119         if (flags < 0)
 120                 err(1, "fcntl F_GETFD");
 121         flags |= FD_CLOEXEC;
 122         if (fcntl(score_fd, F_SETFD, flags) == -1)
 123                 err(1, "fcntl F_SETFD");
 124         /*
 125          * This is done to take advantage of stdio, while still
 126          * allowing a O_CREAT during the open(2) of the log file.
 127          */
 128         score_fp = fdopen(score_fd, "r+");
 129         if (score_fp == NULL) {
 130                 warn("fdopen %s", _PATH_SCORE);
 131                 return;
 132         }
 133 }
 134
 135 int
 136 log_score(int list_em)
 137 {
 138         int             i, num_scores = 0, good, changed = 0, found = 0;
 139         struct passwd   *pw;
 140         char            *cp;
 141         SCORE           score[100], thisscore;
 142         struct utsname  lname;
 143         long            offset;
 144
 145         if (score_fp == NULL) {
 146                 warnx("no score file available");
 147                 return (-1);
 148         }
 149
 150 #ifdef BSD
 151         if (flock(fileno(score_fp), LOCK_EX) < 0)
 152 #endif
 153 #ifdef SYSV
 154         while (lockf(fileno(score_fp), F_LOCK, 1) < 0)
 155 #endif
 156         {
 157                 warn("flock %s", _PATH_SCORE);
 158                 return (-1);
 159         }
 160         for (;;) {
 161                 good = fscanf(score_fp, SCORE_SCANF_FMT,
 162                            score[num_scores].name,
 163                            score[num_scores].host,
 164                            score[num_scores].game,
 165                            &score[num_scores].planes,
 166                            &score[num_scores].time,
 167                            &score[num_scores].real_time);
 168                 if (good != 6 || ++num_scores >= NUM_SCORES)
 169                         break;
 170         }
 171         if (!test_mode && !list_em) {
 172                 if ((pw = (struct passwd *) getpwuid(getuid())) == NULL) {
 173                         (void)fprintf(stderr,
 174                                 "getpwuid failed for uid %d.  Who are you?\n",
 175                                 (int)getuid());
 176                         return (-1);
 177                 }
 178                 (void)strcpy(thisscore.name, pw->pw_name);
 179                 (void)uname(&lname);
 180                 (void)strlcpy(thisscore.host, lname.nodename,
 181                     sizeof(thisscore.host));
 182
 183                 cp = strrchr(filename, '/');
 184                 if (cp == NULL) {
 185                         (void)fprintf(stderr, "log: where's the '/' in %s?\n",
 186                             filename);
 187                         return (-1);
 188                 }
 189                 cp++;
 190                 (void)strcpy(thisscore.game, cp);
 191
 192                 thisscore.time = clck;
 193                 thisscore.planes = safe_planes;
 194                 thisscore.real_time = time(0) - start_time;
 195
 196                 for (i = 0; i < num_scores; i++) {
 197                         if (strcmp(thisscore.name, score[i].name) == 0 &&
 198                             strcmp(thisscore.host, score[i].host) == 0 &&
 199                             strcmp(thisscore.game, score[i].game) == 0) {
 200                                 if (thisscore.time > score[i].time) {
 201                                         score[i].time = thisscore.time;
 202                                         score[i].planes = thisscore.planes;
 203                                         score[i].real_time =
 204                                             thisscore.real_time;
 205                                         changed++;
 206                                 }
 207                                 found++;
 208                                 break;
 209                         }
 210                 }
 211                 if (!found) {
 212                         for (i = 0; i < num_scores; i++) {
 213                                 if (thisscore.time > score[i].time) {
 214                                         if (num_scores < NUM_SCORES)
 215                                                 num_scores++;
 216                                         (void)memcpy(&score[num_scores - 1],
 217                                             &score[i], sizeof (score[i]));
 218                                         (void)memcpy(&score[i], &thisscore,
 219                                             sizeof (score[i]));
 220                                         changed++;
 221                                         break;
 222                                 }
 223                         }
 224                 }
 225                 if (!found && !changed && num_scores < NUM_SCORES) {
 226                         (void)memcpy(&score[num_scores], &thisscore,
 227                             sizeof (score[num_scores]));
 228                         num_scores++;
 229                         changed++;
 230                 }
 231
 232                 if (changed) {
 233                         if (found)
 234                                 (void)puts("You beat your previous score!");
 235                         else
 236                                 (void)puts("You made the top players list!");
 237                         qsort(score, (size_t)num_scores, sizeof (*score),
 238                             compar);
 239                         rewind(score_fp);
 240                         for (i = 0; i < num_scores; i++)
 241                                 (void)fprintf(score_fp, "%s %s %s %d %d %d\n",
 242                                     score[i].name, score[i].host,
 243                                     score[i].game, score[i].planes,
 244                                     score[i].time, score[i].real_time);
 245                         (void)fflush(score_fp);
 246                         if (ferror(score_fp))
 247                                 warn("error writing %s", _PATH_SCORE);
 248                         /* It is just possible that updating an entry could
 249                          * have reduced the length of the file, so we
 250                          * truncate it.  The seeks are required for stream/fd
 251                          * synchronisation by POSIX.1.  */
 252                         offset = ftell(score_fp);
 253                         (void)lseek(fileno(score_fp), (off_t)0, SEEK_SET);
 254                         (void)ftruncate(fileno(score_fp), (off_t)offset);
 255                         rewind(score_fp);
 256                 } else {
 257                         if (found)
 258                                 (void)puts(
 259                                     "You didn't beat your previous score.");
 260                         else
 261                                 (void)puts(
 262                                     "You didn't make the top players list.");
 263                 }
 264                 (void)putchar('\n');
 265         }
 266 #ifdef BSD
 267         (void)flock(fileno(score_fp), LOCK_UN);
 268 #endif
 269 #ifdef SYSV
 270         /* lock will evaporate upon close */
 271 #endif
 272         (void)fclose(score_fp);
 273         (void)printf("%2s:  %-8s  %-8s  %-18s  %4s  %9s  %4s\n", "#", "name",
 274             "host", "game", "time", "real time", "planes safe");
 275         (void)printf("-------------------------------------------------------");
 276         (void)printf("-------------------------\n");
 277         for (i = 0; i < num_scores; i++) {
 278                 cp = strchr(score[i].host, '.');
 279                 if (cp != NULL)
 280                         *cp = '\0';
 281                 (void)printf("%2d:  %-8s  %-8s  %-18s  %4d  %9s  %4d\n", i + 1,
 282                     score[i].name, score[i].host, score[i].game,
 283                     score[i].time, timestr(score[i].real_time),
 284                     score[i].planes);
 285         }
 286         (void)putchar('\n');
 287         return (0);
 288 }
 289
 290 /* ARGSUSED */
 291 void
 292 log_score_quit(int dummy __attribute__((__unused__)))
 293 {
 294         (void)log_score(0);
 295         exit(0);
 296 }