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annotate rogue4/extern.h @ 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 ea7372f5d314
children 1b73a8641b37
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1 /*
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2 * Defines for things used in mach_dep.c
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3 *
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4 * @(#)extern.h 4.3 (Berkeley) 4/2/82
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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, 1982 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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13 /*
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14 * Don't change the constants, since they are used for sizes in many
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15 * places in the program.
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16 */
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17
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18 #define MAXSTR 80 /* maximum length of strings */
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19 #define MAXLINES 32 /* maximum number of screen lines used */
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20 #define MAXCOLS 80 /* maximum number of screen columns used */
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21
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22 #define RN (((seed = seed*11109+13849) >> 16) & 0xffff)
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24 /*
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25 * Now all the global variables
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26 */
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27
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28 extern bool after, amulet, askme, door_stop, fight_flush,
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29 firstmove, in_shell, jump, noscore, p_know[], passgo,
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30 playing, r_know[], running, s_know[], save_msg,
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31 slow_invent, terse, use_savedir, wizard, ws_know[];
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34 extern const char *p_colors[], *r_stones[], *w_names[],
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35 *a_names[], *ws_made[];
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36 extern char _flags[], _level[], file_name[], fruit[],
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37 home[], huh[], outbuf[], *p_guess[],
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38 prbuf[], *r_guess[], *release, runch,
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39 *s_guess[], *s_names[], take, whoami[],
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40 *ws_guess[], *ws_type[];
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41
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42 extern int a_chances[], a_class[], count, dnum, food_left,
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43 fung_hit, fd, group, hungry_state, inpack, lastscore,
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44 level, lfd, max_level, mpos, no_command, no_food, no_move,
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45 ntraps, purse, quiet, total;
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46
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47 extern long seed;
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48
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49 extern WINDOW *hw;
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50
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51 /*
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52 * Function types
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53 */
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54
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55 char *charge_str(), *ctime(), *getenv(), *inv_name(),
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56 *killname(), *nothing(), *num(), *ring_num(),
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57 *tr_name(),
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58 *unctrol(), *vowelstr();
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59
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60 void leave(int), quit(int), tstp(), auto_save(int), endit(int);
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61 int doctor(), nohaste(),
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62 rollwand(), runners(), sight(), stomach(), swander(),
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63 turn_see(), unconfuse(), unsee();
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64
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65 void checkout();
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66
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67 long lseek();
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68
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69 extern coord ch_ret;
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70 extern shint countch;
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71 extern shint direction;
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72 extern shint newcount;
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73 extern int between;
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74 extern int num_checks;
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75 extern char lvl_mons[27];
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76 extern char wand_mons[27];
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77 extern coord nh;
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78 extern bool got_genocide;
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79
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80 #if defined(__GLIBC__) || defined(__INTERIX)
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81 /*
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82 O_BINARY flag not provided in Interix/SFU or some versions of Linux.
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83 It is the same as default behavior so we just zero define it here
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84 to make source code compatible.
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85 */
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86 #define O_BINARY 0
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87 #endif
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88
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89 extern FILE *md_fdopen(int fd, char *mode);
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90 extern char *md_getusername(int uid);
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91 extern char *md_gethomedir();