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annotate xrogue/save.c @ 144:708bb2dea17c

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arogue7, xrogue: prevent potential NULL dereferencing. It is possible for getpwuid() to fail and return NULL. Various md_get* functions now check for this.
author John "Elwin" Edwards
date Mon, 18 May 2015 10:53:22 -0400
parents 443c8bd3e290
children 6e6fb0955095
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1 /*
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2 save.c - save and restore routines
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3
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4 XRogue: Expeditions into the Dungeons of Doom
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5 Copyright (C) 1991 Robert Pietkivitch
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6 All rights reserved.
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7
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8 Based on "Advanced Rogue"
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9 Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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10 All rights reserved.
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11
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12 Based on "Rogue: Exploring the Dungeons of Doom"
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13 Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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14 All rights reserved.
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15
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16 See the file LICENSE.TXT for full copyright and licensing information.
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17 */
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18
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19 #include <curses.h>
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20 #include <ctype.h>
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21 #include <string.h>
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22 #include <sys/types.h>
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23 #include <signal.h>
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24 #include <fcntl.h>
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25 #include <errno.h>
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26 #include "rogue.h"
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27 #include "mach_dep.h"
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28
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29 extern char version[];
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30 extern unsigned char encstr[];
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31 extern int big_endian;
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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 = wgetch(cw);
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53 if (c == ESC) 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 }
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62 else
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63 goto gotfile; /* must save to file restored from */
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64
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65 if (use_savedir) {
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66 msg("");
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67 return FALSE;
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68 }
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69
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70 do
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71 {
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72 msg("File name: ");
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73 mpos = 0;
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74 buf[0] = '\0';
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75 if (get_str(buf, msgw) == QUIT)
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76 {
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77 msg("");
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78 return FALSE;
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79 }
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80 strcpy(file_name, buf);
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81 gotfile:
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82
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83 if ((savef = fopen(file_name, "wb")) == NULL) {
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84 msg(strerror(errno));
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85 if (use_savedir)
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86 return FALSE;
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87 }
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88 } while (savef == NULL);
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89
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90 msg("");
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91 /*
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