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annotate srogue/command.c @ 144:708bb2dea17c

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arogue7, xrogue: prevent potential NULL dereferencing. It is possible for getpwuid() to fail and return NULL. Various md_get* functions now check for this.
author John "Elwin" Edwards
date Mon, 18 May 2015 10:53:22 -0400
parents 458df24e973d
children 576cc8154521
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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 9.0 (rdk) 7/17/84
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5 *
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6 * Super-Rogue
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7 * Copyright (C) 1984 Robert D. Kindelberger
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8 * All rights reserved.
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9 *
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10 * Based on "Rogue: Exploring the Dungeons of Doom"
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11 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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12 * All rights reserved.
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13 *
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14 * See the file LICENSE.TXT for full copyright and licensing information.
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15 */
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16
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17 #include <ctype.h>
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18 #include <signal.h>
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19 #include <stdlib.h>
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20 #include <string.h>
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21 #include <limits.h>
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22 #include "rogue.h"
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23 #include "rogue.ext"
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24 #ifdef __DJGPP__
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25 #include <process.h>
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26 #else
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27 #include <unistd.h>
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28 #endif
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29
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30 /*
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31 * command:
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32 * Process the user commands
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33 */
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34 command()
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35 {
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36 reg char ch;
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37 reg int ntimes = 1; /* Number of player moves */
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38 static char countch, direction, newcount = FALSE;
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39
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40 if (pl_on(ISHASTE))
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41 ntimes++;
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42 /*
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43 * Let the daemons start up
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44 */
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45 while (ntimes-- > 0) {
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46 do_daemons(BEFORE);
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47 look(TRUE);
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48 if (!running)
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49 door_stop = FALSE;
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50 lastscore = purse;
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51 wmove(cw, hero.y, hero.x);
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52 if (!(running || count))
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53 draw(cw); /* Draw screen */
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54 take = 0;
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55 after = TRUE;
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56 /*
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57 * Read command or continue run
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58 */
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59 if (wizard)
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60 waswizard = TRUE;
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61 if (player.t_nocmd <= 0) {
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62 player.t_nocmd = 0;
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63 if (running)
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64 ch = runch;
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65 else if (count)
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66 ch = countch;
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67 else {
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68 ch = readchar();
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69 if (mpos != 0 && !running) /* Erase message if its there */
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70 msg("");
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71 }
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72 }
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73 else
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74 ch = '.';
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75 if (player.t_nocmd > 0) {
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76 if (--player.t_nocmd <= 0)
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77 msg("You can move again.");
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78 }
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79 else {
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80 /*
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81 * check for prefixes
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82 */
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83 if (isdigit(ch)) {
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84 count = 0;
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85 newcount = TRUE;
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86 while (isdigit(ch)) {
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87 count = count * 10 + (ch - '0');
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88 ch = readchar();
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89 }
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90 countch = ch;
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91 /*
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92 * turn off count for commands which don't make sense
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93 * to repeat
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94 */
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95 switch (ch) {
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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 'H': case 'J': case 'K': case 'L':
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99 case 'Y': case 'U': case 'B': case 'N':
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100 case 'q': case 'r': case 's': case 'f':
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101 case 't': case 'C': case 'I': case '.':
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102 case 'z': case 'p':
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103 break;
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104 default:
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105 count = 0;
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