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annotate rogue3/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 47aeaccbb953
children e52a8a7ad4c5
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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 * @(#)command.c 3.45 (Berkeley) 6/15/81
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5 *
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6 * Rogue: Exploring the Dungeons of Doom
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7 * Copyright (C) 1980, 1981 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 <ctype.h>
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15 #include <signal.h>
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16 #include <string.h>
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17 #include "curses.h"
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18 #include "machdep.h"
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19 #include "rogue.h"
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20
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21 /*
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22 * command:
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23 * Process the user commands
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24 */
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25
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26 void
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27 command()
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28 {
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29 int ch;
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30 int ntimes = 1; /* Number of player moves */
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31 static int countch, direction, newcount = FALSE;
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32
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33
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34 if (on(player, ISHASTE)) ntimes++;
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35 /*
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36 * Let the daemons start up
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37 */
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38 do_daemons(BEFORE);
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39 do_fuses(BEFORE);
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40 while (ntimes--)
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41 {
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42 look(TRUE);
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43 if (!running)
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44 door_stop = FALSE;
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45 status();
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46 lastscore = purse;
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47 wmove(cw, hero.y, hero.x);
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48 if (!((running || count) && jump))
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49 draw(cw); /* Draw screen */
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50 take = 0;
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51 after = TRUE;
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52 /*
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53 * Read command or continue run
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54 */
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55 if (wizard)
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56 waswizard = TRUE;
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57 if (!no_command)
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58 {
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59 if (running) ch = runch;
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60 else if (count) ch = countch;
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61 else
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62 {
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63 ch = readchar(cw);
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64 if (mpos != 0 && !running) /* Erase message if its there */
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65 msg("");
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66 }
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67 }
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68 else ch = ' ';
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69 if (no_command)
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70 {
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71 if (--no_command == 0)
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72 msg("You can move again.");
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73 }
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74 else
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75 {
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76 /*
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77 * check for prefixes
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78 */
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79 if (isdigit(ch))
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80 {
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81 count = 0;
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82 newcount = TRUE;
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83 while (isdigit(ch))
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84 {
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85 count = count * 10 + (ch - '0');
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86 ch = readchar(cw);
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87 }
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88 countch = ch;
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89 /*
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90 * turn off count for commands which don't make sense
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91 * to repeat
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92 */
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93 switch (ch) {
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94 case 'h': case 'j': case 'k': case 'l':
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95 case 'y': case 'u': case 'b': case 'n':
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96 case 'H': case 'J': case 'K': case 'L':
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97 case 'Y': case 'U': case 'B': case 'N':
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98 case 'q': case 'r': case 's': case 'f':
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e551d384f7c6 Rest on '.' instead of ' ', like all the other roguelikes
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99 case 't': case 'C': case 'I': case '.':
0
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100 case 'z': case 'p':
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101 break;
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102 default:
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103 count = 0;
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104 }
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