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annotate rogue5/rooms.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 * Create the layout for the new level
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3 *
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4 * @(#)rooms.c 4.45 (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 <ctype.h>
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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 typedef struct spot { /* position matrix for maze positions */
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18 int nexits;
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19 coord exits[4];
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20 int used;
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21 } SPOT;
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22
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23 #define GOLDGRP 1
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24
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25 /*
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26 * do_rooms:
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27 * Create rooms and corridors with a connectivity graph
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28 */
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29
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30 void
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31 do_rooms(void)
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32 {
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33 int i;
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34 struct room *rp;
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35 THING *tp;
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36 int left_out;
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37 coord top;
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38 coord bsze; /* maximum room size */
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39 coord mp;
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40
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41 bsze.x = NUMCOLS / 3;
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42 bsze.y = NUMLINES / 3;
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43 /*
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44 * Clear things for a new level
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45 */
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46 for (rp = rooms; rp < &rooms[MAXROOMS]; rp++)
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47 {
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48 rp->r_goldval = 0;
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49 rp->r_nexits = 0;
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50 rp->r_flags = 0;
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51 }
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52 /*
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53 * Put the gone rooms, if any, on the level
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54 */
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55 left_out = rnd(4);
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56 for (i = 0; i < left_out; i++)
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57 rooms[rnd_room()].r_flags |= ISGONE;
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58 /*
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59 * dig and populate all the rooms on the level
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60 */
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61 for (i = 0, rp = rooms; i < MAXROOMS; rp++, i++)
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62 {
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63 /*
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64 * Find upper left corner of box that this room goes in
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65 */
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66 top.x = (i % 3) * bsze.x + 1;
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67 top.y = (i / 3) * bsze.y;
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68 if (rp->r_flags & ISGONE)
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69 {
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70 /*
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71 * Place a gone room. Make certain that there is a blank line
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72 * for passage drawing.
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73 */
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74 do
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75 {
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76 rp->r_pos.x = top.x + rnd(bsze.x - 2) + 1;
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77 rp->r_pos.y = top.y + rnd(bsze.y - 2) + 1;
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78 rp->r_max.x = -NUMCOLS;
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79 rp->r_max.y = -NUMLINES;
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80 } until (rp->r_pos.y > 0 && rp->r_pos.y < NUMLINES-1);
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81 continue;
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82 }
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83 /*
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84 * set room type
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85 */
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86 if (rnd(10) < level - 1)
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87 {
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88 rp->r_flags |= ISDARK; /* dark room */
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89 if (rnd(15) == 0)
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90 rp->r_flags = ISMAZE; /* maze room */
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91 }
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92 /*
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93 * Find a place and size for a random room
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94 */
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95 if (rp->r_flags & ISMAZE)
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96 {
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97 rp->r_max.x = bsze.x - 1;
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98 rp->r_max.y = bsze.y - 1;
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99 if ((rp->r_pos.x = top.x) == 1)
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100 rp->r_pos.x = 0;
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101 if ((rp->r_pos.y = top.y) == 0)
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102 {
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103 rp->r_pos.y++;
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104 rp->r_max.y--;
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105 }
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106 }
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107 else
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