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annotate rogue3/daemon.c @ 310:827441d05b3e

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Advanced Rogue family: fix some potential buffer overflows. Some code for determining the score file location assumed that PATH_MAX would be less than 1024, which cannot be guaranteed. Advanced Rogue 5 and 7, and XRogue, have had the buffers for the file name enlarged. UltraRogue never called the functions, so the code has been deleted instead.
author John "Elwin" Edwards
date Mon, 03 May 2021 19:05:37 -0400
parents 527e2150eaf0
children
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1 /*
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2 * Contains functions for dealing with things that happen in the
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3 * future.
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4 *
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5 * @(#)daemon.c 3.3 (Berkeley) 6/15/81
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6 *
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7 * Rogue: Exploring the Dungeons of Doom
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8 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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9 * All rights reserved.
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10 *
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11 * See the file LICENSE.TXT for full copyright and licensing information.
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12 */
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13
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14 #include "curses.h"
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15 #include "rogue.h"
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16
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17 #define EMPTY 0
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18 #define DAEMON -1
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19 #define MAXDAEMONS 20
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20
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21 #define _X_ { EMPTY }
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22
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23 struct delayed_action d_list[MAXDAEMONS] = {
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24 _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_,
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25 _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_,
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26 };
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27
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28 /*
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29 * d_slot:
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30 * Find an empty slot in the daemon/fuse list
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31 */
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32 struct delayed_action *
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33 d_slot()
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34 {
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35 register int i;
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36 register struct delayed_action *dev;
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37
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38 for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++)
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39 if (dev->d_type == EMPTY)
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40 return dev;
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41 debug("Ran out of fuse slots");
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42 return NULL;
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43 }
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44
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45 /*
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46 * find_slot:
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47 * Find a particular slot in the table
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48 */
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49
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50 struct delayed_action *
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51 find_slot(void (*func)())
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52 {
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53 register int i;
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54 register struct delayed_action *dev;
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55
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56 for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++)
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57 if (dev->d_type != EMPTY && func == dev->d_func)
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58 return dev;
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59 return NULL;
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60 }
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61
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62 /*
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63 * daemon:
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64 * Start a daemon, takes a function.
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65 */
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66
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67 void
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68 start_daemon(void (*func)(), int arg, int type)
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69 {
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70 register struct delayed_action *dev;
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71
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72 dev = d_slot();
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73
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74 if (dev != NULL)
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75 {
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76 dev->d_type = type;
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77 dev->d_func = func;
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78 dev->d_arg = arg;
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79 dev->d_time = DAEMON;
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80 }
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81 }
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82
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83 /*
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84 * kill_daemon:
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85 * Remove a daemon from the list
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86 */
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87
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88 void
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89 kill_daemon(void (*func)())
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90 {
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91 register struct delayed_action *dev;
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92
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93 if ((dev = find_slot(func)) == NULL)
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94 return;
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95 /*
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96 * Take it out of the list
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97 */
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98 dev->d_type = EMPTY;
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99 }
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100
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101 /*
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102 * do_daemons:
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103 * Run all the daemons that are active with the current flag,
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104 * passing the argument to the function.
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105 */
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106