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annotate rogue3/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 e676d52b5d09
children e52a8a7ad4c5
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1 /*
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2 * This file has all the code for the option command.
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3 * I would rather this command were not necessary, but
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4 * it is the only way to keep the wolves off of my back.
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5 *
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6 * @(#)options.c 3.3 (Berkeley) 5/25/81
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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 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 <stdlib.h>
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16 #include "curses.h"
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17 #include <ctype.h>
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18 #include <string.h>
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19 #include "machdep.h"
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20 #include "rogue.h"
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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 void *o_opt; /* pointer to thing to set */
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31 void (*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); /* doesn't need to be externally visible */
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38
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39 OPTION optlist[] = {
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40 {"terse", "Terse output: ",
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41 (int *) &terse, put_bool, get_bool },
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42 {"flush", "Flush typeahead during battle: ",
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43 (int *) &fight_flush, put_bool, get_bool },
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44 {"jump", "Show position only at end of run: ",
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45 (int *) &jump, put_bool, get_bool },
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46 {"step", "Do inventories one line at a time: ",
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47 (int *) &slow_invent, put_bool, get_bool },
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48 {"askme", "Ask me about unidentified things: ",
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49 (int *) &askme, put_bool, get_bool },
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50 {"name", "Name: ",
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51 (int *) whoami, put_str, get_str },
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52 {"fruit", "Fruit: ",
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53 (int *) fruit, put_str, get_str },
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54 {"file", "Save file: ",
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55 (int *) file_name, put_str, get_str }
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56 };
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57
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58 /*
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59 * print and then set options from the terminal
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60 */
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61 void
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62 option()
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63 {
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64 OPTION *op;
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65 int retval;
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66
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67 wclear(hw);
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68 touchwin(hw);
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69 /*
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70 * Display current values of options
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71 */
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72 for (op = optlist; op <= &optlist[NUM_OPTS-1]; op++)
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73 {
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74 if (allowchange(op))
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75 {
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76 waddstr(hw, op->o_prompt);
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77 (*op->o_putfunc)(op->o_opt);
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78 waddch(hw, '\n');
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79 }
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80 }
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81 /*
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82 * Set values
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83 */
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84 wmove(hw, 0, 0);
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85 for (op = optlist; op <= &optlist[NUM_OPTS-1]; op++)
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86 {
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87 if (!allowchange(op))
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88 continue;
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89 waddstr(hw, op->o_prompt);
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90 if ((retval = (*op->o_getfunc)(op->o_opt, hw)))
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91 {
0
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92 if (retval == QUIT)
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93 break;
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94 #if 0
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95 /* Support for MINUS has been removed because making it work with
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96 * hidden unchangable options without underflowing optlist will
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97 * require a complete rewrite. And it should also be rewritten
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98 * so option() doesn't count on get_str() to put the cursor in the
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99 * right place, because that makes it a pain to understand.
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100 */