atc/log.c

   1 /*      $NetBSD: log.c,v 1.24 2019/03/19 00:11:34 pgoyette 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 1.24 2019/03/19 00:11:34 pgoyette 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 (safe_planes == 1)
 165                 printf("You directed 1 plane safely to its destination.\n\n");
 166         else
 167                 printf("You directed %d planes safely to their destinations.\n\n",
 168                     safe_planes);
 169
 170         if (score_fp == NULL) {
 171                 warnx("no score file available");
 172                 return (-1);
 173         }
 174
 175 #ifdef BSD
 176         if (flock(fileno(score_fp), LOCK_EX) < 0)
 177 #endif
 178 #ifdef SYSV
 179         if (lockf(fileno(score_fp), F_LOCK, 1) < 0)
 180 #endif
 181         {
 182                 warn("flock %s", _PATH_SCORE);
 183                 return (-1);
 184         }
 185         for (;;) {
 186                 good = fscanf(score_fp, SCORE_SCANF_FMT,
 187                            score[num_scores].name,
 188                            score[num_scores].host,
 189                            score[num_scores].game,
 190                            &score[num_scores].planes,
 191                            &score[num_scores].time,
 192                            &score[num_scores].real_time);
 193                 if (good != 6 || ++num_scores >= NUM_SCORES)
 194                         break;
 195         }
 196         if (!test_mode && !list_em) {
 197                 if ((pw = (struct passwd *) getpwuid(getuid())) == NULL) {
 198                         (void)fprintf(stderr,
 199                                 "getpwuid failed for uid %d.  Who are you?\n",
 200                                 (int)getuid());
 201                         return (-1);
 202                 }
 203                 (void)strlcpy(thisscore.name, pw->pw_name, SCORE_NAME_LEN);
 204                 (void)uname(&lname);
 205                 (void)strlcpy(thisscore.host, lname.nodename,
 206                     sizeof(thisscore.host));
 207
 208                 cp = strrchr(filename, '/');
 209                 if (cp == NULL) {
 210                         (void)fprintf(stderr, "log: where's the '/' in %s?\n",
 211                             filename);
 212                         return (-1);
 213                 }
 214                 cp++;
 215                 (void)strlcpy(thisscore.game, cp, SCORE_GAME_LEN);
 216
 217                 thisscore.time = clck;
 218                 thisscore.planes = safe_planes;
 219                 thisscore.real_time = time(0) - start_time;
 220
 221                 for (i = 0; i < num_scores; i++) {
 222                         if (strcmp(thisscore.name, score[i].name) == 0 &&
 223                             strcmp(thisscore.host, score[i].host) == 0 &&
 224                             strcmp(thisscore.game, score[i].game) == 0) {
 225                                 if (thisscore.time > score[i].time) {
 226                                         score[i].time = thisscore.time;
 227                                         score[i].planes = thisscore.planes;
 228                                         score[i].real_time =
 229                                             thisscore.real_time;
 230                                         changed++;
 231                                 }
 232                                 found++;
 233                                 break;
 234                         }
 235                 }
 236                 if (!found) {
 237                         for (i = 0; i < num_scores; i++) {
 238                                 if (thisscore.time > score[i].time) {
 239                                         if (num_scores < NUM_SCORES)
 240                                                 num_scores++;
 241                                         (void)memcpy(&score[num_scores - 1],
 242                                             &score[i], sizeof (score[i]));
 243                                         (void)memcpy(&score[i], &thisscore,
 244                                             sizeof (score[i]));
 245                                         changed++;
 246                                         break;
 247                                 }
 248                         }
 249                 }
 250                 if (!found && !changed && num_scores < NUM_SCORES) {
 251                         (void)memcpy(&score[num_scores], &thisscore,
 252                             sizeof (score[num_scores]));
 253                         num_scores++;
 254                         changed++;
 255                 }
 256
 257                 if (changed) {
 258                         if (found)
 259                                 (void)puts("You beat your previous score!");
 260                         else
 261                                 (void)puts("You made the top players list!");
 262                         qsort(score, (size_t)num_scores, sizeof (*score),
 263                             compar);
 264                         rewind(score_fp);
 265                         for (i = 0; i < num_scores; i++)
 266                                 (void)fprintf(score_fp, "%s %s %s %d %d %d\n",
 267                                     score[i].name, score[i].host,
 268                                     score[i].game, score[i].planes,
 269                                     score[i].time, score[i].real_time);
 270                         (void)fflush(score_fp);
 271                         if (ferror(score_fp))
 272                                 warn("error writing %s", _PATH_SCORE);
 273                         /* It is just possible that updating an entry could
 274                          * have reduced the length of the file, so we
 275                          * truncate it.  The seeks are required for stream/fd
 276                          * synchronisation by POSIX.1.  */
 277                         offset = ftell(score_fp);
 278                         (void)lseek(fileno(score_fp), (off_t)0, SEEK_SET);
 279                         (void)ftruncate(fileno(score_fp), (off_t)offset);
 280                         rewind(score_fp);
 281                 } else {
 282                         if (found)
 283                                 (void)puts(
 284                                     "You didn't beat your previous score.");
 285                         else
 286                                 (void)puts(
 287                                     "You didn't make the top players list.");
 288                 }
 289                 (void)putchar('\n');
 290         }
 291 #ifdef BSD
 292         (void)flock(fileno(score_fp), LOCK_UN);
 293 #endif
 294 #ifdef SYSV
 295         /* lock will evaporate upon close */
 296 #endif
 297         (void)fclose(score_fp);
 298         (void)printf("%2s:  %-8s  %-8s  %-18s  %4s  %9s  %4s\n", "#", "name",
 299             "host", "game", "time", "real time", "planes safe");
 300         (void)printf("-------------------------------------------------------");
 301         (void)printf("-------------------------\n");
 302         for (i = 0; i < num_scores; i++) {
 303                 cp = strchr(score[i].host, '.');
 304                 if (cp != NULL)
 305                         *cp = '\0';
 306                 (void)printf("%2d:  %-8s  %-8s  %-18s  %4d  %9s  %4d\n", i + 1,
 307                     score[i].name, score[i].host, score[i].game,
 308                     score[i].time, timestr(score[i].real_time),
 309                     score[i].planes);
 310         }
 311         (void)putchar('\n');
 312         return (0);
 313 }
 314
 315 /* ARGSUSED */
 316 void
 317 log_score_quit(int dummy __unused)
 318 {
 319         (void)log_score(0);
 320         exit(0);
 321 }