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annotate arogue7/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 c697782a9b37
children 89deb1197a2d
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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 * Advanced Rogue
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5 * Copyright (C) 1984, 1985, 1986 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 /*
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16 * save and restore routines
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17 *
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18 */
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19
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20 #include "curses.h"
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21 #include <ctype.h>
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22 #include <stdlib.h>
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23 #include <string.h>
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24 #include <sys/types.h>
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25 #include <sys/stat.h>
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26 #include <signal.h>
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27 #include "rogue.h"
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28 #include <fcntl.h>
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29 #include <errno.h>
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30 #include "mach_dep.h"
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31 #ifdef PC7300
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32 #include "sys/window.h"
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33 extern struct uwdata wdata;
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34 #endif
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35
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36 #if u370 || uts
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37 #define ENCREAD(b,n,fd) read(fd,b,n)
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38 #define ENCWRITE(b,n,fd) write(fd,b,n)
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39 #endif
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40 #ifndef ENCREAD
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41 #define ENCREAD encread
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42 #define ENCWRITE encwrite
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43 #endif
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44
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45 typedef struct stat STAT;
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46
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47 extern char version[], encstr[];
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48 /* extern bool _endwin; */
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49 extern int errno;
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50
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51 STAT sbuf;
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52
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53 bool
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54 save_game()
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55 {
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56 register int savefd;
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57 register int c;
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58 char buf[LINELEN];
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59
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60 /*
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61 * get file name
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62 */
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63 mpos = 0;
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64 if (file_name[0] != '\0')
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65 {
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66 if (use_savedir)
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67 msg("Save game? ");
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68 else
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69 msg("Save file (%s)? ", file_name);
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70 do
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71 {
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72 c = readchar();
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73 if (c == ESCAPE) return(0);
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74 } while (c != 'n' && c != 'N' && c != 'y' && c != 'Y');
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75 mpos = 0;
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76 if (c == 'y' || c == 'Y')
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77 {
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78 msg("File name: %s", file_name);
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79 goto gotfile;
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80 }
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81 }
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82
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83 if (use_savedir)
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84 {
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85 msg("");
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86 return FALSE;
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87 }
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88
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89 do
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90 {
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91 msg("File name: ");
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92 mpos = 0;
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