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annotate xrogue/encumb.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 e6179860cb76
children f54901b9c39b
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1 /*
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2 encumb.c - Stuff to do with encumberance
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3
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4 XRogue: Expeditions into the Dungeons of Doom
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5 Copyright (C) 1991 Robert Pietkivitch
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6 All rights reserved.
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7
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8 Based on "Advanced Rogue"
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9 Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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10 All rights reserved.
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11
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12 See the file LICENSE.TXT for full copyright and licensing information.
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13 */
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14
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15 #include <curses.h>
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16 #include "rogue.h"
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17
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18 /*
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19 * updpack:
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20 * Update his pack weight and adjust fooduse accordingly
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21 */
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22
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23 updpack(getmax, tp)
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24 int getmax;
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25 struct thing *tp;
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26 {
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27
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28 reg int topcarry, curcarry;
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29
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30 if (getmax)
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31 tp->t_stats.s_carry = totalenc(tp); /* get total encumb */
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32 curcarry = packweight(tp); /* get pack weight */
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33
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34 /* Only update food use for the player (for now) */
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35 if (tp == &player) {
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36 topcarry = tp->t_stats.s_carry / 5; /* 20% of total carry */
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37 if(curcarry > 4 * topcarry) {
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38 if(rnd(100) < 80)
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39 foodlev = 3; /* > 80% of pack */
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40 } else if(curcarry > 3 * topcarry) {
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41 if(rnd(100) < 60)
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42 foodlev = 2; /* > 60% of pack */
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43 } else
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44 foodlev = 1; /* <= 60% of pack */
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45 }
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46 tp->t_stats.s_pack = curcarry; /* update pack weight */
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47 }
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48
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49
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50 /*
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51 * packweight:
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52 * Get the total weight of the hero's pack
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53 */
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54
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55 packweight(tp)
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56 register struct thing *tp;
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57 {
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58 reg struct object *obj;
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59 reg struct linked_list *pc;
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60 reg int weight;
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61
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62 weight = 0;
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63 for (pc = tp->t_pack ; pc != NULL ; pc = next(pc)) {
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64 obj = OBJPTR(pc);
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65 weight += itemweight(obj);
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66 }
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67 if (weight < 0) /* in case of amulet */
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68 weight = 0;
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69
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70 /* If this is the player, is he wearing a ring of carrying? */
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71 if (tp == &player && ISWEARING(R_CARRY)) {
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72 register int temp, i;
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73
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74 temp = 0;
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75 for (i=0; i<NUM_FINGERS; i++) {
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76 if (cur_ring[i] != NULL && cur_ring[i]->o_which == R_CARRY) {
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77 if (cur_ring[i]->o_flags & ISCURSED) temp--;
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78 else temp += 2;
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79 }
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80 }
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81 weight -= (temp * weight) / 4;
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82 }
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83
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84 return(weight);
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85 }
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86
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87 /*
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88 * itemweight:
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89 * Get the weight of an object
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90 */
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91
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92 itemweight(wh)
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