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annotate xrogue/scrolls.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 0298a68cc179
children f54901b9c39b
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1 /*
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2 scrolls.c - Functions for dealing with scrolls
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3
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4 XRogue: Expeditions into the Dungeons of Doom
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5 Copyright (C) 1991 Robert Pietkivitch
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6 All rights reserved.
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7
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8 Based on "Advanced Rogue"
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9 Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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10 All rights reserved.
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11
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12 Based on "Rogue: Exploring the Dungeons of Doom"
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13 Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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14 All rights reserved.
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15
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16 See the file LICENSE.TXT for full copyright and licensing information.
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17 */
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18
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ce0cf824c192 xrogue: add missing includes.
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19 #include <stdlib.h>
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20 #include <curses.h>
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21 #include <ctype.h>
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22 #include "rogue.h"
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23
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24 /*
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25 * let the hero get rid of some type of monster
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26 */
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27
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28 genocide()
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29 {
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30 register struct linked_list *ip;
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31 register struct thing *mp;
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32 register struct linked_list *nip;
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33 /* cannot genocide any uniques */
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34 register int num_monst = NUMMONST-NUMUNIQUE-NUMDINOS;
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35 register int which_monst;
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36
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37 which_monst = makemonster(FALSE, "wipe out");
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38 if (which_monst <= 0 || which_monst >= num_monst) {
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39 msg("");
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40 return;
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41 }
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42
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43 /* Remove this monster from the present level */
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44 for (ip = mlist; ip; ip = nip) {
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45 mp = THINGPTR(ip);
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46 nip = next(ip);
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47 if (mp->t_index == which_monst) {
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48 killed(ip, FALSE, FALSE, TRUE);
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49 }
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50 }
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51
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52 /* Remove from available monsters */
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53 monsters[which_monst].m_normal = FALSE;
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54 monsters[which_monst].m_wander = FALSE;
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55 mpos = 0;
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56 msg("You have wiped out the %s.", monsters[which_monst].m_name);
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57 }
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58
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59 read_scroll(which, flag, is_scroll)
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60 register int which;
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61 int flag;
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62 bool is_scroll;
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63 {
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64 register struct object *obj = NULL, *nobj;
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65 register struct linked_list *item, *nitem;
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66 register int i,j;
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67 register unsigned char ch, nch;
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68 bool cursed, blessed;
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69
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70 blessed = FALSE;
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71 cursed = FALSE;
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72 item = NULL;
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73
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74 if (which < 0) {
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75 if (on(player, ISBLIND)) {
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76 msg("You can't see to read anything!");
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77 return;
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78 }
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79 if (on(player, ISINWALL)) {
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80 msg("You can't see the scroll while inside rock!");
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81 return;
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82 }
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83
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84 /* This is a scroll or book. */
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85 if (player.t_action != C_READ) {
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86 int units;
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87
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88 item = get_item(pack, "read", READABLE, FALSE, FALSE);
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89
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90 /*
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91 * Make certain that it is somethings that we want to read
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