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annotate arogue5/player.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 34a87d84ea31
children beab22b087a1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
63
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1 /*
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2 * This file contains functions for dealing with special player abilities
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3 *
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4 * Advanced Rogue
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5 * Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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6 * All rights reserved.
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7 *
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8 * See the file LICENSE.TXT for full copyright and licensing information.
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9 */
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10
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11 #include "curses.h"
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12 #include "rogue.h"
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13
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14
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15 /*
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16 * affect:
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17 * cleric affecting undead
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18 */
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19
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20 affect()
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21 {
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22 register struct linked_list *item;
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23 register struct thing *tp;
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24 register const char *mname;
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25 bool see;
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26 coord new_pos;
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27
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28 if (player.t_ctype != C_CLERIC && cur_relic[HEIL_ANKH] == 0) {
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29 msg("Only clerics can affect undead.");
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30 return;
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31 }
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32
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33 new_pos.y = hero.y + delta.y;
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34 new_pos.x = hero.x + delta.x;
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35
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36 if (cansee(new_pos.y, new_pos.x)) see = TRUE;
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37 else see = FALSE;
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38
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39 /* Anything there? */
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40 if (new_pos.y < 0 || new_pos.y > LINES-3 ||
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41 new_pos.x < 0 || new_pos.x > COLS-1 ||
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42 mvwinch(mw, new_pos.y, new_pos.x) == ' ') {
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43 msg("Nothing to affect.");
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44 return;
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45 }
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46
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47 if ((item = find_mons(new_pos.y, new_pos.x)) == NULL) {
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48 debug("Affect what @ %d,%d?", new_pos.y, new_pos.x);
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49 return;
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50 }
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51 tp = THINGPTR(item);
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52 mname = monsters[tp->t_index].m_name;
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53
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54 if (on(player, ISINVIS) && off(*tp, CANSEE)) {
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55 sprintf(outstring,"%s%s cannot see you", see ? "The " : "It",
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56 see ? mname : "");
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57 msg(outstring);
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58 return;
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59 }
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60
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61 if (off(*tp, TURNABLE) || on(*tp, WASTURNED))
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62 goto annoy;
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63 turn_off(*tp, TURNABLE);
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64
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65 /* Can cleric kill it? */
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66 if (pstats.s_lvl >= 3 * tp->t_stats.s_lvl) {
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67 unsigned long test; /* For overflow check */
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68
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69 sprintf(outstring,"You have destroyed %s%s.", see ? "the " : "it", see ? mname : "");
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70 msg(outstring);
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71 test = pstats.s_exp + tp->t_stats.s_exp;
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72
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73 /* Be sure there is no overflow before increasing experience */
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74 if (test > pstats.s_exp) pstats.s_exp = test;
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75 killed(item, FALSE, TRUE);
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76 check_level(TRUE);
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77 return;
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78 }
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79
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80 /* Can cleric turn it? */
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81 if (rnd(100) + 1 >
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82 (100 * ((2 * tp->t_stats.s_lvl) - pstats.s_lvl)) / pstats.s_lvl) {
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83 unsigned long test; /* Overflow test */
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84
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85 /* Make the monster flee */
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86 turn_on(*tp, WASTURNED); /* No more fleeing after this */
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87 turn_on(*tp, ISFLEE);
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88 runto(tp, &hero);
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89
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90 /* Let player know */
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91 sprintf(outstring,"You have turned %s%s.", see ? "the " : "it", see ? mname : "");
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92 msg(outstring);
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93
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94 /* get points for turning monster -- but check overflow first */
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95 test = pstats.s_exp + tp->t_stats.s_exp/2;
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96 if (test > pstats.s_exp) pstats.s_exp = test;
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97 check_level(TRUE);
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98
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99 /* If monster was suffocating, stop it */
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100 if (on(*tp, DIDSUFFOCATE)) {
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101 turn_off(*tp, DIDSUFFOCATE);
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102 extinguish(suffocate);
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103 }
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104