annotate arogue5/save.c @ 111:7f8f43943b1f

Fix some terribly depressing corruption during restore. In rogue5/state.c, rs_read_daemons() zeroes out the argument and delay if the daemon slot is empty. Unfortunately that code ended up on the wrong side of the brace that closes the for loop, so instead of running after each daemon, it got run once after the loop exited, when the index was of course out of bounds. This tended to manifest, when compiled with -O2, by overwriting hw and setting it to NULL. When inventory() next ran, hw would be passed to wgetch(), which returns ERR when it gets a NULL argument. This made md_readchar() think something was wrong and autosave the game. Upon investigation, rogue3 was found to commit the same mistake. rogue4 and srogue don't zero the data. arogue5 already does it properly. Someday I am going to run all this through Valgrind. Someday when I am a kinder person who will not be driven to invoke hordes of trolls and centaurs upon the original authors.
author John "Elwin" Edwards
date Wed, 08 Jan 2014 16:44:16 -0500
parents d852b8f088c5
children 7795b0938921
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1 /*
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2 * save and restore routines
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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 <stdlib.h>
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17 #include <string.h>
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18 #include <fcntl.h>
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19 #include <errno.h>
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20 #include <ctype.h>
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21 #include <sys/types.h>
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22 #include <sys/stat.h>
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23 #include <signal.h>
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24 #include "rogue.h"
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25
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26 typedef struct stat STAT;
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27
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28 extern char version[], encstr[];
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29 /* extern bool _endwin; */
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30
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31 STAT sbuf;
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32
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33 bool
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34 save_game()
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35 {
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36 register FILE *savef;
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37 register int c;
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38 char buf[LINELEN];
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39
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40 /*
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41 * get file name
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42 */
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43 mpos = 0;
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44 if (file_name[0] != '\0')
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45 {
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46 if (use_savedir)
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47 msg("Save game? ");
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48 else
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49 msg("Save file (%s)? ", file_name);
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50 do
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51 {
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52 c = readchar();
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53 if (c == ESCAPE) return(0);
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54 } while (c != 'n' && c != 'N' && c != 'y' && c != 'Y');
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55 mpos = 0;
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56 if (c == 'y' || c == 'Y')
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57 {
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58 msg("File name: %s", file_name);
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59 goto gotfile;
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60 }
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61 if (use_savedir) {
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62 msg("");
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63 return FALSE;
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64 }
63
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65 }
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66
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67 do
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68 {
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69 msg("File name: ");
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70 mpos = 0;
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71 buf[0] = '\0';
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72 if (get_str(buf, msgw) == QUIT)
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73 {
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74 msg("");
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75 return FALSE;
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76 }
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77 msg("");
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78 strcpy(file_name, buf);
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79 gotfile:
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80 if ((savef = fopen(file_name, "w")) == NULL)
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81 {
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82 msg(strerror(errno)); /* fake perror() */
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83 if (use_savedir)
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84 return FALSE;
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85 }
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86 } while (savef == NULL);
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87
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88 /*
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89 * write out encrpyted file (after a stat)
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90 * The fwrite is to force allocation of the buffer before the write
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91 */
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92 if (save_file(savef) != 0) {
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93 msg("Cannot create save file.");
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94 unlink(file_name);
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95 return(FALSE);
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96 }
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97 else return(TRUE);
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98 }
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99
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100 /*
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101 * automatically save a file. This is used if a HUP signal is
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102 * recieved
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