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annotate rogue4/options.c @ 176:db1c9a21a7c3

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srogue: prevent overflowing the score file name. If SCOREFILE is not defined, roguehome() is called to find a directory for the score file. It copies up to PATH_MAX-20 bytes from an environment variable to a static buffer. Later these are strcpy()'d to scorefile, which is of size LINLEN. Unfortunately LINLEN is 80 and PATH_MAX is at least 256. On Linux, it happens to be 4096. I haven't yet managed to crash or exploit it, but there are surely no beneficial consequences, so roguehome() has been modified to check the length, and the string it returns is also checked in main().
author John "Elwin" Edwards
date Sun, 02 Aug 2015 12:14:47 -0400
parents e7dc81b41168
children 1b73a8641b37
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1 /*
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2 * This file has all the code for the option command. I would rather
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3 * this command were not necessary, but it is the only way to keep the
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4 * wolves off of my back.
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5 *
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6 * @(#)options.c 4.12 (Berkeley) 3/2/82
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7 *
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8 * Rogue: Exploring the Dungeons of Doom
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9 * Copyright (C) 1980, 1981, 1982 Michael Toy, Ken Arnold and Glenn Wichman
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10 * All rights reserved.
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11 *
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12 * See the file LICENSE.TXT for full copyright and licensing information.
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13 */
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14
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15 #include <curses.h>
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16 #include <ctype.h>
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17 #include <string.h>
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18 #include "rogue.h"
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19
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20 #define EQSTR(a, b, c) (strncmp(a, b, c) == 0)
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21
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22 #define NUM_OPTS (sizeof optlist / sizeof (OPTION))
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23
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24 /*
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25 * description of an option and what to do with it
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26 */
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27 struct optstruct {
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28 char *o_name; /* option name */
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29 char *o_prompt; /* prompt for interactive entry */
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30 int *o_opt; /* pointer to thing to set */
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31 int (*o_putfunc)(); /* function to print value */
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32 int (*o_getfunc)(); /* function to get value interactively */
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33 };
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34
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35 typedef struct optstruct OPTION;
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36
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37 int allowchange(OPTION *opt);
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38
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39 int put_bool(), get_bool(), put_str(), get_str();
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40
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41 OPTION optlist[] = {
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42 {"terse", "Terse output: ",
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43 (int *) &terse, put_bool, get_bool },
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44 {"flush", "Flush typeahead during battle: ",
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45 (int *) &fight_flush, put_bool, get_bool },
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46 {"jump", "Show position only at end of run: ",
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47 (int *) &jump, put_bool, get_bool },
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48 {"step", "Do inventories one line at a time: ",
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49 (int *) &slow_invent, put_bool, get_bool },
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50 {"askme", "Ask me about unidentified things: ",
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51 (int *) &askme, put_bool, get_bool },
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52 {"passgo", "Follow turnings in passageways: ",
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53 (int *) &passgo, put_bool, get_bool },
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54 {"name", "Name: ",
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55 (int *) whoami, put_str, get_str },
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56 {"fruit", "Fruit: ",
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57 (int *) fruit, put_str, get_str },
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58 {"file", "Save file: ",
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59 (int *) file_name, put_str, get_str }
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60 };
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61
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62 /*
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63 * option:
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64 * Print and then set options from the terminal
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65 */
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66 option()
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67 {
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68 register OPTION *op;
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69 register int retval;
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70
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71 wclear(hw);
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72 /*
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73 * Display current values of options
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74 */
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75 for (op = optlist; op < &optlist[NUM_OPTS]; op++)
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76 {
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77 if (allowchange(op))
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78 {
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79 waddstr(hw, op->o_prompt);
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80 (*op->o_putfunc)(op->o_opt);
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81 waddch(hw, '\n');
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82 }
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83 }
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84 /*
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85 * Set values
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86 */
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87 wmove(hw, 0, 0);
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88 for (op = optlist; op < &optlist[NUM_OPTS]; op++)
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89 {
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90 if (!allowchange(op))
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91 continue;
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92 waddstr(hw, op->o_prompt);
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93 if ((retval = (*op->o_getfunc)(op->o_opt, hw)))
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94 {
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95 if (retval == QUIT)
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96 break;
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97 #if 0 /* disable MINUS */
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98 else if (op > optlist) { /* MINUS */
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99 wmove(hw, (op - optlist) - 1, 0);
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100 op -= 2;
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