atc/log.c

   1 /*      $NetBSD: log.c,v 1.23 2017/01/10 20:40:53 christos 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 1.23 2017/01/10 20:40:53 christos Exp $");
  50 #endif
  51 #endif /* not lint */
  52
  53 #include <sys/types.h>
  54 #include <sys/utsname.h>
  55 #include <sys/stat.h>   /* for umask(2) */
  56 #include <stdio.h>
  57 #include <stdlib.h>
  58 #include <string.h>
  59 #include <unistd.h>
  60 #include <fcntl.h>
  61 #include <pwd.h>
  62 #include <err.h>
  63
  64 #include "pathnames.h"
  65 #include "def.h"
  66 #include "struct.h"
  67 #include "extern.h"
  68 #include "tunable.h"
  69
  70 static FILE *score_fp;
  71
  72 static int
  73 compar(const void *va, const void *vb)
  74 {
  75         const SCORE     *a, *b;
  76
  77         a = (const SCORE *)va;
  78         b = (const SCORE *)vb;
  79         if (b->planes == a->planes)
  80                 return (b->time - a->time);
  81         else
  82                 return (b->planes - a->planes);
  83 }
  84
  85 #define SECAMIN         60
  86 #define MINAHOUR        60
  87 #define HOURADAY        24
  88 #define SECAHOUR        (SECAMIN * MINAHOUR)
  89 #define SECADAY         (SECAHOUR * HOURADAY)
  90 #define DAY(t)          ((t) / SECADAY)
  91 #define HOUR(t)         (((t) % SECADAY) / SECAHOUR)
  92 #define MIN(t)          (((t) % SECAHOUR) / SECAMIN)
  93 #define SEC(t)          ((t) % SECAMIN)
  94
  95 static const char *
  96 timestr(int t)
  97 {
  98         static char     s[80];
  99
 100         if (DAY(t) > 0)
 101                 (void)snprintf(s, sizeof(s), "%dd+%02dhrs", DAY(t), HOUR(t));
 102         else if (HOUR(t) > 0)
 103                 (void)snprintf(s, sizeof(s), "%d:%02d:%02d", HOUR(t), MIN(t),
 104                         SEC(t));
 105         else if (MIN(t) > 0)
 106                 (void)snprintf(s, sizeof(s), "%d:%02d", MIN(t), SEC(t));
 107         else if (SEC(t) > 0)
 108                 (void)snprintf(s, sizeof(s), ":%02d", SEC(t));
 109         else
 110                 *s = '\0';
 111
 112         return (s);
 113 }
 114
 115 void
 116 open_score_file(void)
 117 {
 118         mode_t old_mask;
 119         int score_fd;
 120         int flags;
 121
 122         old_mask = umask(0);
 123 #if defined(O_NOFOLLOW)
 124         score_fd = open(_PATH_SCORE, O_CREAT|O_RDWR|O_NOFOLLOW, 0664);
 125 #else
 126         score_fd = open(_PATH_SCORE, O_CREAT|O_RDWR, 0664);
 127 #endif
 128         (void)umask(old_mask);
 129         if (score_fd < 0) {
 130                 warn("open %s", _PATH_SCORE);
 131                 return;
 132         }
 133         if (score_fd < 3)
 134                 exit(1);
 135         /* Set the close-on-exec flag.  If this fails for any reason, quit
 136          * rather than leave the score file open to tampering.  */
 137         flags = fcntl(score_fd, F_GETFD);
 138         if (flags < 0)
 139                 err(1, "fcntl F_GETFD");
 140         flags |= FD_CLOEXEC;
 141         if (fcntl(score_fd, F_SETFD, flags) == -1)
 142                 err(1, "fcntl F_SETFD");
 143         /*
 144          * This is done to take advantage of stdio, while still
 145          * allowing a O_CREAT during the open(2) of the log file.
 146          */
 147         score_fp = fdopen(score_fd, "r+");
 148         if (score_fp == NULL) {
 149                 warn("fdopen %s", _PATH_SCORE);
 150                 return;
 151         }
 152 }
 153
 154 int
 155 log_score(int list_em)
 156 {
 157         int             i, num_scores = 0, good, changed = 0, found = 0;
 158         struct passwd   *pw;
 159         char            *cp;
 160         SCORE           score[100], thisscore;
 161         struct utsname  lname;
 162         long            offset;
 163
 164         if (score_fp == NULL) {
 165                 warnx("no score file available");
 166                 return (-1);
 167         }
 168
 169 #ifdef BSD
 170         if (flock(fileno(score_fp), LOCK_EX) < 0)
 171 #endif
 172 #ifdef SYSV
 173         if (lockf(fileno(score_fp), F_LOCK, 1) < 0)
 174 #endif
 175         {
 176                 warn("flock %s", _PATH_SCORE);
 177                 return (-1);
 178         }
 179         for (;;) {
 180                 good = fscanf(score_fp, SCORE_SCANF_FMT,
 181                            score[num_scores].name,
 182                            score[num_scores].host,
 183                            score[num_scores].game,
 184                            &score[num_scores].planes,
 185                            &score[num_scores].time,
 186                            &score[num_scores].real_time);
 187                 if (good != 6 || ++num_scores >= NUM_SCORES)
 188                         break;
 189         }
 190         if (!test_mode && !list_em) {
 191                 if ((pw = (struct passwd *) getpwuid(getuid())) == NULL) {
 192                         (void)fprintf(stderr,
 193                                 "getpwuid failed for uid %d.  Who are you?\n",
 194                                 (int)getuid());
 195                         return (-1);
 196                 }
 197                 (void)strlcpy(thisscore.name, pw->pw_name, SCORE_NAME_LEN);
 198                 (void)uname(&lname);
 199                 (void)strlcpy(thisscore.host, lname.nodename,
 200                     sizeof(thisscore.host));
 201
 202                 cp = strrchr(filename, '/');
 203                 if (cp == NULL) {
 204                         (void)fprintf(stderr, "log: where's the '/' in %s?\n",
 205                             filename);
 206                         return (-1);
 207                 }
 208                 cp++;
 209                 (void)strlcpy(thisscore.game, cp, SCORE_GAME_LEN);
 210
 211                 thisscore.time = clck;
 212                 thisscore.planes = safe_planes;
 213                 thisscore.real_time = time(0) - start_time;
 214
 215                 for (i = 0; i < num_scores; i++) {
 216                         if (strcmp(thisscore.name, score[i].name) == 0 &&
 217                             strcmp(thisscore.host, score[i].host) == 0 &&
 218                             strcmp(thisscore.game, score[i].game) == 0) {
 219                                 if (thisscore.time > score[i].time) {
 220                                         score[i].time = thisscore.time;
 221                                         score[i].planes = thisscore.planes;
 222                                         score[i].real_time =
 223                                             thisscore.real_time;
 224                                         changed++;
 225                                 }
 226                                 found++;
 227                                 break;
 228                         }
 229                 }
 230                 if (!found) {
 231                         for (i = 0; i < num_scores; i++) {
 232                                 if (thisscore.time > score[i].time) {
 233                                         if (num_scores < NUM_SCORES)
 234                                                 num_scores++;
 235                                         (void)memcpy(&score[num_scores - 1],
 236                                             &score[i], sizeof (score[i]));
 237                                         (void)memcpy(&score[i], &thisscore,
 238                                             sizeof (score[i]));
 239                                         changed++;
 240                                         break;
 241                                 }
 242                         }
 243                 }
 244                 if (!found && !changed && num_scores < NUM_SCORES) {
 245                         (void)memcpy(&score[num_scores], &thisscore,
 246                             sizeof (score[num_scores]));
 247                         num_scores++;
 248                         changed++;
 249                 }
 250
 251                 if (changed) {
 252                         if (found)
 253                                 (void)puts("You beat your previous score!");
 254                         else
 255                                 (void)puts("You made the top players list!");
 256                         qsort(score, (size_t)num_scores, sizeof (*score),
 257                             compar);
 258                         rewind(score_fp);
 259                         for (i = 0; i < num_scores; i++)
 260                                 (void)fprintf(score_fp, "%s %s %s %d %d %d\n",
 261                                     score[i].name, score[i].host,
 262                                     score[i].game, score[i].planes,
 263                                     score[i].time, score[i].real_time);
 264                         (void)fflush(score_fp);
 265                         if (ferror(score_fp))
 266                                 warn("error writing %s", _PATH_SCORE);
 267                         /* It is just possible that updating an entry could
 268                          * have reduced the length of the file, so we
 269                          * truncate it.  The seeks are required for stream/fd
 270                          * synchronisation by POSIX.1.  */
 271                         offset = ftell(score_fp);
 272                         (void)lseek(fileno(score_fp), (off_t)0, SEEK_SET);
 273                         (void)ftruncate(fileno(score_fp), (off_t)offset);
 274                         rewind(score_fp);
 275                 } else {
 276                         if (found)
 277                                 (void)puts(
 278                                     "You didn't beat your previous score.");
 279                         else
 280                                 (void)puts(
 281                                     "You didn't make the top players list.");
 282                 }
 283                 (void)putchar('\n');
 284         }
 285 #ifdef BSD
 286         (void)flock(fileno(score_fp), LOCK_UN);
 287 #endif
 288 #ifdef SYSV
 289         /* lock will evaporate upon close */
 290 #endif
 291         (void)fclose(score_fp);
 292         (void)printf("%2s:  %-8s  %-8s  %-18s  %4s  %9s  %4s\n", "#", "name",
 293             "host", "game", "time", "real time", "planes safe");
 294         (void)printf("-------------------------------------------------------");
 295         (void)printf("-------------------------\n");
 296         for (i = 0; i < num_scores; i++) {
 297                 cp = strchr(score[i].host, '.');
 298                 if (cp != NULL)
 299                         *cp = '\0';
 300                 (void)printf("%2d:  %-8s  %-8s  %-18s  %4d  %9s  %4d\n", i + 1,
 301                     score[i].name, score[i].host, score[i].game,
 302                     score[i].time, timestr(score[i].real_time),
 303                     score[i].planes);
 304         }
 305         (void)putchar('\n');
 306         return (0);
 307 }
 308
 309 /* ARGSUSED */
 310 void
 311 log_score_quit(int dummy __unused)
 312 {
 313         (void)log_score(0);
 314         exit(0);
 315 }