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annotate rogue4/extern.h @ 280:70aa5808c782

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Fix potential segfaults at restore related to ctime(). In some games, restore() passes the result of ctime() to mvprintw() or some other variadic message-formatting function. If ctime() has not been declared properly, its return type is inferred to be int instead of char *. This does not cause a warning because the compiler does not know the correct type of variadic arguments. On platforms where ints and pointers are not the same size, this can, probably depending on alignment, result in a segfault that is not easy to trace. Including time.h fixes the problem. Some games manually declared ctime() and avoided the bug. These declarations have also been replaced with the include.
author John "Elwin" Edwards
date Fri, 15 Sep 2017 20:51:10 -0400
parents d3968e9cb98d
children e52a8a7ad4c5
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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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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, group, hungry_state, inpack, lastscore,
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44 level, 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 FILE *score_file, *log_file;
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50
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51 extern WINDOW *hw;
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52
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53 /*
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54 * Function types
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55 */
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57 void tstp(), endit(int);
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58
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59 long lseek();
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60
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61 extern coord ch_ret;
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62 extern shint countch;
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63 extern shint direction;
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64 extern shint newcount;
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65 extern int between;
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66 extern int num_checks;
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67 extern char lvl_mons[27];
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68 extern char wand_mons[27];
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69 extern coord nh;
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70 extern bool got_genocide;
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71
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72 #if defined(__GLIBC__) || defined(__INTERIX)
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73 /*
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74 O_BINARY flag not provided in Interix/SFU or some versions of Linux.
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75 It is the same as default behavior so we just zero define it here
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76 to make source code compatible.
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77 */
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78 #define O_BINARY 0
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79 #endif
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80
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81 extern int md_erasechar(void);
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82 extern FILE *md_fdopen(int fd, char *mode);
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83 extern int md_fileno(FILE *fp);
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84 extern char *md_getusername(int uid);
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85 extern char *md_gethomedir();
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86 extern int md_getuid(void);
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87 extern void md_ignore_signals(void);
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88 extern void md_init(void);
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89 extern int md_killchar(void);
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90 extern void md_normaluser(void);
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91 extern int md_readchar(WINDOW *win);
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92 extern int md_shellescape(void);
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93 extern void md_sleep(int s);
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94 extern int md_unlink(char *file);
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95 extern int md_unlink_open_file(char *file, FILE *inf);
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96 extern unsigned int md_random_seed(void);