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annotate rogue5/misc.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 * All sorts of miscellaneous routines
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3 *
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4 * @(#)misc.c 4.66 (Berkeley) 08/06/83
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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 <stdlib.h>
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14 #include <curses.h>
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15 #include <string.h>
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16 #include <ctype.h>
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17 #include "rogue.h"
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18
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19 /*
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20 * look:
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21 * A quick glance all around the player
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22 */
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23 #undef DEBUG
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24
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25
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26 void
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27 look(int wakeup)
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28 {
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29 int x, y;
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30 chtype ch;
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31 THING *tp;
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32 PLACE *pp;
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33 struct room *rp;
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34 int ey, ex;
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35 int passcount;
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36 int pfl, *fp, pch;
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37 int sy, sx, sumhero = 0, diffhero = 0;
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38 # ifdef DEBUG
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39 static int done = FALSE;
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40
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41 if (done)
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42 return;
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43 done = TRUE;
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44 # endif /* DEBUG */
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45 passcount = 0;
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46 rp = proom;
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47 if (!ce(oldpos, hero))
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48 {
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49 erase_lamp(&oldpos, oldrp);
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50 oldpos = hero;
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51 oldrp = rp;
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52 }
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53 ey = hero.y + 1;
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54 ex = hero.x + 1;
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55 sx = hero.x - 1;
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56 sy = hero.y - 1;
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57 if (door_stop && !firstmove && running)
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58 {
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59 sumhero = hero.y + hero.x;
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60 diffhero = hero.y - hero.x;
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61 }
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62 pp = INDEX(hero.y, hero.x);
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63 pch = pp->p_ch;
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64 pfl = pp->p_flags;
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65
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66 for (y = sy; y <= ey; y++)
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67 if (y > 0 && y < NUMLINES - 1) for (x = sx; x <= ex; x++)
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68 {
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69 if (x < 0 || x >= NUMCOLS)
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70 continue;
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71 if (!on(player, ISBLIND))
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72 {
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73 if (y == hero.y && x == hero.x)
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74 continue;
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75 }
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76
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77 pp = INDEX(y, x);
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78 ch = pp->p_ch;
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79 if (ch == ' ') /* nothing need be done with a ' ' */
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80 continue;
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81 fp = &pp->p_flags;
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82 if (pch != DOOR && ch != DOOR)
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83 if ((pfl & F_PASS) != (*fp & F_PASS))
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84 continue;
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85 if (((*fp & F_PASS) || ch == DOOR) &&
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86 ((pfl & F_PASS) || pch == DOOR))
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87 {
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88 if (hero.x != x && hero.y != y &&
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89 !step_ok(chat(y, hero.x)) && !step_ok(chat(hero.y, x)))
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90 continue;
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91 }
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92
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93 if ((tp = pp->p_monst) == NULL)
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94 ch = trip_ch(y, x, ch);
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95 else
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96 if (on(player, SEEMONST) && on(*tp, ISINVIS))
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97 {
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98 if (door_stop && !firstmove)
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99 running = FALSE;
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100 continue;
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101 }
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102 else
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103 {
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104 if (wakeup)
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105 wake_monster(y, x);
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106 if (see_monst(tp))
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107 {
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108 if (on(player, ISHALU))