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annotate arogue5/io.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 c49f7927b0fa
children 56e748983fa8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Various input/output functions
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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 <ctype.h>
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c49f7927b0fa arogue5: add missing header files.
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17 #include <string.h>
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18 #include <stdarg.h>
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19 #include "rogue.h"
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20
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21 /*
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22 * msg:
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23 * Display a message at the top of the screen.
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24 */
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25
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26 static char msgbuf[BUFSIZ];
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27 static int newpos = 0;
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28
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29 /*VARARGS1*/
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30 msg(char *fmt, ...)
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31 {
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32 va_list ap;
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33 /*
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34 * if the string is "", just clear the line
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35 */
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36 if (*fmt == '\0')
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37 {
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38 overwrite(cw,msgw);
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39 wmove(msgw, 0, 0);
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40 clearok(msgw, FALSE);
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41 draw(msgw);
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42 mpos = 0;
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43 return;
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44 }
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45 /*
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46 * otherwise add to the message and flush it out
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47 */
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48 va_start(ap,fmt);
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49 doadd(fmt, ap);
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50 va_end(ap);
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51 endmsg();
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52 }
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53
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54 /*
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55 * add things to the current message
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56 */
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57 addmsg(char *fmt, ...)
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58 {
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59 va_list ap;
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60 va_start(ap,fmt);
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61 doadd(fmt, ap);
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62 va_end(ap);
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63 }
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64
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65 /*
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66 * Display a new msg (giving him a chance to see the previous one if it
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67 * is up there with the --More--)
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68 */
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69 endmsg()
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70 {
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71 strncpy(huh, msgbuf, sizeof(huh));
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72
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73 huh[ sizeof(huh) - 1 ] = 0;
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74
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75 if (mpos)
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76 {
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77 wmove(msgw, 0, mpos);
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78 waddstr(msgw, morestr);
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79 draw(cw);
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80 draw(msgw);
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81 wait_for(msgw,' ');
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82 overwrite(cw,msgw);
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83 wmove(msgw,0,0);
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84 touchwin(cw);
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85 }
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86 else {
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87 overwrite(cw,msgw);
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88 wmove(msgw,0,0);
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89 }
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90 waddstr(msgw, msgbuf);
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91 mpos = newpos;
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92 newpos = 0;
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93 msgbuf[0] = '\0';
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94 draw(cw);
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95 clearok(msgw, FALSE);
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96 draw(msgw);
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97 }
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98
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99 doadd(char *fmt, va_list ap)
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100 {
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101 /*
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102 * Do the sprintf into newmsg and append to msgbuf
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103 */
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104
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105 vsnprintf(&msgbuf[newpos], sizeof(msgbuf)-newpos-1, fmt, ap);
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106
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