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annotate srogue/main.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 1863409c44cf
children 7c552cbc6ad9
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1 /*
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2 * Rogue
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3 * Exploring the dungeons of doom
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4 *
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5 * @(#)main.c 9.0 (rdk) 7/17/84
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6 *
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7 * Super-Rogue
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8 * Copyright (C) 1984 Robert D. Kindelberger
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9 * All rights reserved.
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10 *
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11 * Based on "Rogue: Exploring the Dungeons of Doom"
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12 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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13 * All rights reserved.
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14 *
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15 * See the file LICENSE.TXT for full copyright and licensing information.
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16 */
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17
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18 #include <stdlib.h>
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19 #include <string.h>
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20 #include <time.h>
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21 #include <fcntl.h>
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22 #include <stdio.h>
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23 #include <limits.h>
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24 #include <sys/stat.h>
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25 #include "rogue.h"
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26
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27 #ifdef ATT
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28 #include <time.h>
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29 #endif
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30
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31 #ifdef BSD
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32 #include <sys/time.h>
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33 #endif
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34
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35 #include "rogue.ext"
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36
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37 void open_records(void);
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38
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39 extern int scorefd;
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40 extern FILE *logfile;
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41
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42 main(argc, argv, envp)
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43 char **argv;
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44 char **envp;
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45 {
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46 register char *env;
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47 register struct linked_list *item;
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48 register struct object *obj;
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49 char alldone, wpt;
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50 char *getpass(), *xcrypt(), *strrchr();
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51 int lowtime;
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52 time_t now;
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53 char *roguehome();
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54 char *homedir = roguehome();
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55
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56 #ifdef __DJGPP__
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57 _fmode = O_BINARY;
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58 #endif
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59
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60 if (homedir == NULL)
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61 homedir = "";
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63 playuid = md_getuid();
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64 playgid = md_getgid();
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65
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66 /* check for print-score option */
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67 #ifdef SCOREFILE
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68 strncpy(scorefile, SCOREFILE, LINLEN);
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69 scorefile[LINLEN - 1] = '\0';
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70 #else
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72 strncpy(scorefile, homedir, LINLEN-11);
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73 if (scorefile[LINLEN-12] != '\0')
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74 scorefile[0] = '\0';
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75
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76 if (*scorefile)
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77 strcat(scorefile,"/");
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78 strcat(scorefile, "srogue.scr");
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79 #endif
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80 open_records();
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81
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82 if(argc >= 2 && strcmp(argv[1], "-s") == 0)
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83 {
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84 showtop(0);
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85 exit(0);
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86 }
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88 #ifdef WIZARD
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89 if (argc >= 2 && author() && strcmp(argv[1],"-a") == 0)
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90 {
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91 wizard = TRUE;
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92 argv++;
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93 argc--;
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94 }
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95
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96 /* Check to see if he is a wizard */
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97
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98 if (argc >= 2 && strcmp(argv[1],"-w") == 0)
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99 {
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100 if (strcmp(PASSWD, xcrypt(getpass(wizstr),"mT")) == 0)
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101 {
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