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annotate xrogue/main.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 7faf4568c295
children aac28331e71d
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1 /*
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2 main.c - setup code
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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 <stdlib.h>
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20 #include <string.h>
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21 #include <curses.h>
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22 #include <signal.h>
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23 #include <time.h>
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24
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25 #include "mach_dep.h"
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26 #include "network.h"
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27 #include "rogue.h"
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28
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29 FILE *scorefi = NULL;
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30 FILE *logfile = NULL;
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31 void open_records(void);
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32
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33 main(argc, argv, envp)
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34 char **argv;
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35 char **envp;
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36 {
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37 register char *env;
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38 time_t now;
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39
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40 md_init();
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41
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42 /*
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43 * get home and options from environment
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44 */
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45
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46 strncpy(home, md_gethomedir(), LINELEN);
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47
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48 /* Get default save file */
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49 strcpy(file_name, home);
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50 strcat(file_name, "xrogue.sav");
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51
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52 /* Get default score file */
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53 #ifdef SCOREFILE
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54 strncpy(score_file, SCOREFILE, LINELEN);
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55 score_file[LINELEN-1] = '\0';
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56 #else
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57 strcpy(score_file, md_getroguedir());
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58
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59 if (*score_file)
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60 strcat(score_file,"/");
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61
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62 strcat(score_file, "xrogue.scr");
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63 #endif
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64
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65 #ifdef SAVEDIR
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66 /* Check for common save location */
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67 if (argc >= 3 && strcmp(argv[1], "-n") == 0)
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68 {
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69 strncpy(whoami, argv[2], 79);
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70 whoami[79] = '\0';
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71 use_savedir = TRUE;
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72 if (LINELEN <= snprintf(file_name, LINELEN, "%s/%d-%s.xrsav", SAVEDIR,
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73 md_getuid(), whoami))
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74 {
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75 strcpy(file_name, "xrogue.sav");
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76 use_savedir = FALSE;
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77 }
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78 }
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79 #endif
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80
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81 if ((env = getenv("ROGUEOPTS")) != NULL)
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82 parse_opts(env);
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83
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84 if (whoami[0] == '\0')
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85 strucpy(whoami, md_getusername(), strlen(md_getusername()));
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86
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87 open_records();
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88 if (!use_savedir)
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89 md_normaluser();
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90 /*
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