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annotate rogue3/newlevel.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 527e2150eaf0
children
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1 /*
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2 * new_level:
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3 * Dig and draw a new level
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4 *
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5 * @(#)new_level.c 3.7 (Berkeley) 6/2/81
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6 *
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7 * Rogue: Exploring the Dungeons of Doom
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8 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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9 * All rights reserved.
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10 *
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11 * See the file LICENSE.TXT for full copyright and licensing information.
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12 */
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13
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14 #include "curses.h"
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15 #include "rogue.h"
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16
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17 #include <string.h>
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18
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19 void
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20 new_level()
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21 {
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22 int rm, i;
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23 int ch = 0;
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24 coord stairs;
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25
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26 if (level > max_level)
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27 max_level = level;
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28 wclear(cw);
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29 wclear(mw);
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30 clear();
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31 status();
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32 /*
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33 * Free up the monsters on the last level
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34 */
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35 free_list(mlist);
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36 do_rooms(); /* Draw rooms */
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37 do_passages(); /* Draw passages */
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38 no_food++;
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39 put_things(); /* Place objects (if any) */
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40 /*
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41 * Place the staircase down.
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42 */
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43 do {
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44 rm = rnd_room();
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45 rnd_pos(&rooms[rm], &stairs);
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46 } until (winat(stairs.y, stairs.x) == FLOOR);
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47 addch(STAIRS);
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48 /*
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49 * Place the traps
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50 */
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51 if (rnd(10) < level)
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52 {
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53 ntraps = rnd(level/4)+1;
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54 if (ntraps > MAXTRAPS)
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55 ntraps = MAXTRAPS;
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56 i = ntraps;
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57 while (i--)
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58 {
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59 do
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60 {
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61 rm = rnd_room();
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62 rnd_pos(&rooms[rm], &stairs);
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63 } until (winat(stairs.y, stairs.x) == FLOOR);
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64 switch(rnd(6))
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65 {
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66 case 0: ch = TRAPDOOR;
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67 when 1: ch = BEARTRAP;
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68 when 2: ch = SLEEPTRAP;
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69 when 3: ch = ARROWTRAP;
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70 when 4: ch = TELTRAP;
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71 when 5: ch = DARTTRAP;
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72 }
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73 addch(TRAP);
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74 traps[i].tr_type = ch;
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75 traps[i].tr_flags = 0;
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76 traps[i].tr_pos = stairs;
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77 }
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78 }
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79 do
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80 {
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81 rm = rnd_room();
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82 rnd_pos(&rooms[rm], &hero);
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83 }
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84 until(winat(hero.y, hero.x) == FLOOR);
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85 light(&hero);
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86 wmove(cw, hero.y, hero.x);
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87 waddch(cw, PLAYER);
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88 }
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89
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90 /*
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91 * Pick a room that is really there
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92 */
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93
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94 int
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95 rnd_room()
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96 {
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97 int rm;
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98
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99 do
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100 {
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101 rm = rnd(MAXROOMS);
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102 } while (rooms[rm].r_flags & ISGONE);
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103 return rm;
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104 }
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105