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annotate rogue5/monsters.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 f502bf60e6e4
children
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33
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1 /*
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2 * File with various monster functions in it
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3 *
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4 * @(#)monsters.c 4.46 (Berkeley) 02/05/99
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5 *
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6 * Rogue: Exploring the Dungeons of Doom
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7 * Copyright (C) 1980-1983, 1985, 1999 Michael Toy, Ken Arnold and Glenn Wichman
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8 * All rights reserved.
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9 *
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10 * See the file LICENSE.TXT for full copyright and licensing information.
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11 */
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12
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13 #include <curses.h>
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14 #include <string.h>
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15 #include "rogue.h"
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16 #include <ctype.h>
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17
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18 /*
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19 * List of monsters in rough order of vorpalness
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20 */
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21 static const int lvl_mons[] = {
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22 'K', 'E', 'B', 'S', 'H', 'I', 'R', 'O', 'Z', 'L', 'C', 'Q', 'A',
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23 'N', 'Y', 'F', 'T', 'W', 'P', 'X', 'U', 'M', 'V', 'G', 'J', 'D'
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24 };
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25
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26 static const int wand_mons[] = {
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27 'K', 'E', 'B', 'S', 'H', 0, 'R', 'O', 'Z', 0, 'C', 'Q', 'A',
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28 0, 'Y', 0, 'T', 'W', 'P', 0, 'U', 'M', 'V', 'G', 'J', 0
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29 };
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30
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31 /*
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32 * randmonster:
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33 * Pick a monster to show up. The lower the level,
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34 * the meaner the monster.
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35 */
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36 int
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37 randmonster(int wander)
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38 {
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39 int d;
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40 const int *mons;
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41
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42 mons = (wander ? wand_mons : lvl_mons);
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43 do
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44 {
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45 d = level + (rnd(10) - 6);
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46 if (d < 0)
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47 d = rnd(5);
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48 if (d > 25)
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49 d = rnd(5) + 21;
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50 } while (mons[d] == 0);
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51 return mons[d];
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52 }
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53
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54 /*
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55 * new_monster:
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56 * Pick a new monster and add it to the list
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57 */
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58
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59 void
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60 new_monster(THING *tp, int type, const coord *cp)
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61 {
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62 struct monster *mp;
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63 int lev_add;
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64
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65 if ((lev_add = level - AMULETLEVEL) < 0)
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66 lev_add = 0;
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67 attach(mlist, tp);
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68 tp->t_type = type;
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69 tp->t_disguise = type;
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70 tp->t_pos = *cp;
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71 move(cp->y, cp->x);
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72 tp->t_oldch = CCHAR( inch() );
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73 tp->t_room = roomin(cp);
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74 moat(cp->y, cp->x) = tp;
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75 mp = &monsters[tp->t_type-'A'];
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76 tp->t_stats.s_lvl = mp->m_stats.s_lvl + lev_add;
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77 tp->t_stats.s_maxhp = tp->t_stats.s_hpt = roll(tp->t_stats.s_lvl, 8);
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78 tp->t_stats.s_arm = mp->m_stats.s_arm - lev_add;
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79 strcpy(tp->t_stats.s_dmg,mp->m_stats.s_dmg);
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80 tp->t_stats.s_str = mp->m_stats.s_str;
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81 tp->t_stats.s_exp = mp->m_stats.s_exp + lev_add * 10 + exp_add(tp);
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82 tp->t_flags = mp->m_flags;
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83 if (level > 29)
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84 tp->t_flags |= ISHASTE;
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85 tp->t_turn = TRUE;
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86 tp->t_pack = NULL;
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87 if (ISWEARING(R_AGGR))
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88 runto(cp);
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89 if (type == 'X')
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90 tp->t_disguise = rnd_thing();
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91 }
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92
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93 /*
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94 * expadd:
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95 * Experience to add for this monster's level/hit points
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96 */
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97 int
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98 exp_add(const THING *tp)
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99 {
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100 int mod;
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101
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102 if (tp->t_stats.s_lvl == 1)
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103 mod = tp->t_stats.s_maxhp / 8;
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104 else
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105 mod = tp->t_stats.s_maxhp / 6;
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106 if (tp->t_stats.s_lvl > 9)