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annotate rogue5/mach_dep.c @ 110:5f51f7d9805f

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arogue5: fix some save/restore-related crashes. The save/restore code took the pointer intended as an argument for the doctor() daemon and wrote it to the savefile as an int. I don't know why it took so long to fail horribly. The problem has been avoided by replacing the value with &player when restoring. That seems to be the only argument ever actually used. The code also writes only four bytes for an unsigned long; if sizeof(long) == 8, it casts to unsigned int first. It failed to do the cast when reading back, with the result that four bytes were read and the other half of the number was effectively uninitialized. It apparently works now, but the save/restore code ought still to be regarded as decidedly unfortunate.
author John "Elwin" Edwards
date Mon, 06 Jan 2014 15:57:17 -0500
parents 655c317b6237
children 2c62bd925c17
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1 /*
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2 * Various installation dependent routines
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3 *
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4 * @(#)mach_dep.c 4.37 (Berkeley) 05/23/83
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5 *
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6 * Rogue: Exploring the Dungeons of Doom
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7 * Copyright (C) 1980-1983, 1985, 1999 Michael Toy, Ken Arnold and Glenn Wichman
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8 * All rights reserved.
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9 *
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10 * See the file LICENSE.TXT for full copyright and licensing information.
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11 */
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12
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13 /*
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14 * The various tuneable defines are:
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15 *
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16 * SCOREFILE Where/if the score file should live.
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17 * ALLSCORES Score file is top ten scores, not top ten
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18 * players. This is only useful when only a few
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19 * people will be playing; otherwise the score file
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20 * gets hogged by just a few people.
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21 * NUMSCORES Number of scores in the score file (default 10).
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22 * NUMNAME String version of NUMSCORES (first character
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23 * should be capitalized) (default "Ten").
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24 * MAXLOAD What (if any) the maximum load average should be
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25 * when people are playing. Since it is divided
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26 * by 10, to specify a load limit of 4.0, MAXLOAD
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27 * should be "40". If defined, then
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28 * LOADAV Should it use it's own routine to get
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29 * the load average?
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30 * NAMELIST If so, where does the system namelist
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31 * hide?
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32 * MAXUSERS What (if any) the maximum user count should be
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33 * when people are playing. If defined, then
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34 * UCOUNT Should it use it's own routine to count
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35 * users?
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36 * UTMP If so, where does the user list hide?
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37 * CHECKTIME How often/if it should check during the game
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38 * for high load average.
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39 */
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40
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41 #include <signal.h>
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42 #include <sys/types.h>
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43 #include <sys/stat.h>
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44 #include <limits.h>
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45 #include <string.h>
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46 #include <fcntl.h>
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47 #include <errno.h>
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48 #include <time.h>
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49 #include <curses.h>
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50 #include "extern.h"
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51
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52 #define NOOP(x) (x += 0)
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53
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54 # ifndef NUMSCORES
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55 # define NUMSCORES 10
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56 # define NUMNAME "Ten"
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57 # endif
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58
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59 #ifdef CHECKTIME
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60 static int num_checks = 0; /* times we've gone over in checkout() */
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61 #endif /* CHECKTIME */
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62
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63 /*
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64 * init_check:
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65 * Check out too see if it is proper to play the game now
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66 */
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67
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68 void
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69 init_check(void)
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70 {
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71 #if defined(MAXLOAD) || defined(MAXUSERS)
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72 if (too_much())
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73 {
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74 printf("Sorry, %s, but the system is too loaded now.\n", whoami);
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75 printf("Try again later. Meanwhile, why not enjoy a%s %s?\n",
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76 vowelstr(fruit), fruit);
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77 if (author())
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78 printf("However, since you're a good guy, it's up to you\n");
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79 else
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80 exit(1);
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81 }
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82 #endif
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83 }
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84
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85 /*
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86 * open_score:
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87 * Open up the score file for future use
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88 */
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89
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90 void
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91 open_score(void)
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92 {
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93 #ifdef SCOREFILE
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94 char *scorefile = SCOREFILE;
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95
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96 numscores = NUMSCORES;
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97 Numname = NUMNAME;
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98
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99 #ifdef ALLSCORES
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100 allscore = TRUE;
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101 #else /* ALLSCORES */
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102 allscore = FALSE;
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103 #endif /* ALLSCORES */
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104
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105 /*