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annotate arogue5/command.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 a0a57cf42810
children 56e748983fa8
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1 /*
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2 * Read and execute the user commands
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3 *
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4 * Advanced Rogue
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5 * Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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6 * All rights reserved.
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7 *
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8 * Based on "Rogue: Exploring the Dungeons of Doom"
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9 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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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 <stdlib.h>
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17 #include <string.h>
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18 #include <limits.h>
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19 #include <ctype.h>
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20 #include <signal.h>
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21 #include "rogue.h"
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22 #include "mach_dep.h"
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23
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24 /*
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25 * command:
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26 * Process the user commands
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27 */
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28
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29 command()
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30 {
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31 register char ch;
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32 register int ntimes = 1; /* Number of player moves */
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33 static char countch, direction, newcount = FALSE;
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34 struct linked_list *item;
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35 bool an_after = FALSE;
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36
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37 if (on(player, ISHASTE)) {
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38 ntimes++;
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39 turns--; /* correct for later */
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40 }
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41 if (on(player, ISSLOW) || on(player, ISDANCE)) {
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42 if (player.t_turn != TRUE) {
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43 ntimes--;
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44 turns++;
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45 an_after = TRUE;
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46 }
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47 player.t_turn ^= TRUE;
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48 }
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49
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50 /*
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51 * Let the daemons start up
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52 */
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53 do_daemons(BEFORE);
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54 do_fuses(BEFORE);
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55 while (ntimes-- > 0)
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56 {
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57 /* One more tick of the clock. */
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58 if ((++turns % DAYLENGTH) == 0) {
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59 daytime ^= TRUE;
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60 if (levtype == OUTSIDE) {
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61 if (daytime) msg("The sun rises above the horizon");
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62 else msg("The sun sinks below the horizon");
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63 }
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64 light(&hero);
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65 }
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66
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67 look(after, FALSE);
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68 if (!running) door_stop = FALSE;
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69 lastscore = purse;
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70 wmove(cw, hero.y, hero.x);
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71 if (!((running || count) && jump)) {
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72 status(FALSE);
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73 wmove(cw, hero.y, hero.x);
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74 draw(cw); /* Draw screen */
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75 }
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76 take = 0;
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77 after = TRUE;
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78 /*
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79 * Read command or continue run
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80 */
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81 if (!no_command)
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82 {
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83 if (running) {
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84 /* If in a corridor or maze, if we are at a turn with only one
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85 * way to go, turn that way.
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86 */
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87 if ((winat(hero.y, hero.x) == PASSAGE || levtype == MAZELEV) &&
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88 off(player, ISHUH) && (off(player, ISBLIND))) {
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89 int y, x;
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90 if (getdelta(runch, &y, &x) == TRUE) {
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91 corr_move(y, x);
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92 }
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93 }
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94 ch = runch;
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95 }
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96 else if (count) ch = countch;
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97 else
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98 {
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99 ch = readchar();
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100 if (mpos != 0 && !running) /* Erase message if its there */
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101 msg("");
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102 }
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103 }
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