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annotate rogue5/save.c @ 81:0e212d46b68f

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rogue4: don't put savefile metadata into the savefile. The save_file() function in save.c stored the savefile's device number, inode number, creation time, and modification time in the file. The restore() function read them back, and apparently used to compare them to protect against cheaters. Unfortunately, the types and sizes of these numbers differ from system to system, which ruins the Roguelike Restoration Project's fine portability work. So they have been removed from the savefile. This BREAKS SAVEFILE COMPATIBILITY, but old files can be converted by excising the chunk starting at offset 0x22 with length sizeof(ino_t) + sizeof(dev_t) + 2 * sizeof(time_t). That's 0x14 on i686 and 0x20 on x86_64, at least with current versions of Linux and glibc.
author John "Elwin" Edwards
date Mon, 05 Aug 2013 20:49:41 -0700
parents af6b05e86747
children 3d4252fa2ed3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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33
f502bf60e6e4 Import Rogue 5.4 from the Roguelike Restoration Project (r1490)
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1 /*
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2 * save and restore routines
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3 *
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4 * @(#)save.c 4.33 (Berkeley) 06/01/83
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5 *
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6 * Rogue: Exploring the Dungeons of Doom
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7 * Copyright (C) 1980-1983, 1985, 1999 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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12
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13 #include <stdlib.h>
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14 #include <sys/types.h>
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15 #include <sys/stat.h>
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16 #include <errno.h>
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17 #include <signal.h>
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18 #include <string.h>
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19 #include <curses.h>
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20 #include "rogue.h"
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21 #include "score.h"
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22
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23 /*
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24 * save_game:
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25 * Implement the "save game" command
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26 */
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27
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28 void
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29 save_game(void)
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30 {
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31 FILE *savef;
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32 int c;
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33 char buf[MAXSTR];
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34 struct stat sbuf;
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35 /*
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36 * get file name
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37 */
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38 mpos = 0;
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39 over:
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40 if (file_name[0] != '\0')
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41 {
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42 for (;;)
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43 {
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655c317b6237 rogue5: add savedir, logfile, bugfixes
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44 if (use_savedir)
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45 msg("Save game? ");
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46 else
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47 msg("Save file (%s)? ", file_name);
33
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48 c = readchar();
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49 mpos = 0;
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50 if (c == ESCAPE)
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51 {
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52 msg("");
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53 return;
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54 }
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55 else if (c == 'n' || c == 'N' || c == 'y' || c == 'Y')
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56 break;
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57 else
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58 msg("please answer Y or N");
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59 }
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60 if (c == 'y' || c == 'Y')
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61 {
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62 addstr("Yes\n");
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63 refresh();
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64 strcpy(buf, file_name);
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65 goto gotfile;
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66 }
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67 }
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68
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655c317b6237 rogue5: add savedir, logfile, bugfixes
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69 if (use_savedir) /* User chose N, changing location isn't allowed. */
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70 goto quit_it;
33
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71 do
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72 {
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73 mpos = 0;
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74 msg("file name: ");
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75 buf[0] = '\0';
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76 if (get_str(buf, stdscr) == QUIT)
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77 {
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78 quit_it:
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79 msg("");
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80 return;
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81 }
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82 mpos = 0;
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83 gotfile:
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84 /*
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85 * test to see if the file exists
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86 */
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87 if (stat(buf, &sbuf) >= 0 && !use_savedir)
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88 {
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89 for (;;)
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90 {
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91 msg("File exists. Do you wish to overwrite it?");
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92 mpos = 0;
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93 if ((c = readchar()) == ESCAPE)
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94 goto quit_it;
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95 if (c == 'y' || c == 'Y')
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96 break;
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97 else if (c == 'n' || c == 'N')
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98 goto over;
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99 else
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100 msg("Please answer Y or N");
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101 }
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102 msg("file name: %s", buf);
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103 md_unlink(file_name);
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104 }
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105 strcpy(file_name, buf);
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106 if ((savef = fopen(file_name, "w")) == NULL)
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