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annotate rogue4/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 5926ec314fd4
children 1b73a8641b37
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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 4.23 (Berkeley) 5/19/82
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5 *
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6 * Rogue: Exploring the Dungeons of Doom
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7 * Copyright (C) 1980, 1981, 1982 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 * MAXLOAD What (if any) the maximum load average should be
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18 * when people are playing. If defined, then
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19 * LOADAV Should rogue define it's own routine to
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20 * get the load average?
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21 * NAMELIST If so, where does the system namelist hide?
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22 * MAXUSERS What (if any) the maximum user count should be
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23 * when people are playing. If defined, then
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24 * UCOUNT Should rogue define it's own routine to
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25 * count users?
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26 * UTMP If so, where does the user list hide?
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27 * CHECKTIME How often/if rogue should check during the game
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28 * for high load average.
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29 */
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30
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31 #include <limits.h>
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32 #include <stdlib.h>
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33 #include <stdio.h>
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34 #include <curses.h>
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35 #include <time.h>
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36 #include <signal.h>
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37 #include <sys/stat.h>
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38 #include <fcntl.h>
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39 #include <string.h>
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40 #include "rogue.h"
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41
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42 int num_checks; /* times we've gone over in checkout() */
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43
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44 #ifdef SCOREFILE
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45 #ifdef LOCKFILE
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46 static char *lockfile = LOCKFILE;
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47 #endif
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48 #endif
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49
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50 /*
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51 * init_check:
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52 * Check out too see if it is proper to play the game now
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53 */
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54 init_check()
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55 {
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56 if (too_much())
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57 {
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58 printf("Sorry, %s, but the system is too loaded now.\n", whoami);
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59 printf("Try again later. Meanwhile, why not enjoy a%s %s?\n",
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60 vowelstr(fruit), fruit);
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61 if (author())
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62 printf("However, since you're a good guy, it's up to you\n");
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63 else
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64 exit(1);
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65 }
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66 }
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67
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68 /*
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69 * open_score:
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70 * Open up the score file for future use, and then
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71 * setuid(getuid()) in case we are running setuid.
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72 */
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73 open_score()
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74 {
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75 #ifdef SCOREFILE
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76 fd = open(SCOREFILE, O_RDWR | O_CREAT, 0666 );
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77 #else
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78 fd = -1;
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79 #endif
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80 if (!use_savedir)
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81 md_normaluser();
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82 return;
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83 }
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84
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85 void open_log(void)
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86 {
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87 #ifdef LOGFILE
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88 lfd = open(LOGFILE, O_WRONLY | O_APPEND | O_CREAT, 0666);
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89 #else
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90 lfd = -1;
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91 #endif
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92 return;
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93 }
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94
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95 /*
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96 * setup:
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97 * Get starting setup for all games
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98 */
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99 setup()
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100 {
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101 void auto_save(), quit(), endit(), tstp();
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102 #ifdef CHECKTIME
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