Mercurial > hg > early-roguelike
annotate rogue4/save.c @ 251:e7862a021609
Fix the perpetual haste cheat.
Rogue V3 allowed the player to gain perpetual haste by quaffing a
potion of haste while already hasted. This is supposed to remove the
haste effect and cause temporary paralysis.
Super-Rogue removed haste correctly, but gave confusing messages.
author | John "Elwin" Edwards |
---|---|
date | Sat, 28 Jan 2017 11:45:36 -0500 |
parents | 1b73a8641b37 |
children | 3d4252fa2ed3 |
rev | line source |
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12
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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 4.15 (Berkeley) 5/10/82 |
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5 * |
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6 * Rogue: Exploring the Dungeons of Doom |
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7 * Copyright (C) 1980, 1981, 1982 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 <curses.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 <string.h> |
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18 #include <stdlib.h> |
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19 #define KERNEL |
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20 #include <signal.h> |
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21 #undef KERNEL |
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22 #include "rogue.h" |
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23 |
215 | 24 void save_file(FILE *savef); |
25 extern int rs_save_file(FILE *savef); | |
26 extern int rs_restore_file(int inf); | |
27 | |
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28 typedef struct stat STAT; |
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29 |
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30 extern char version[], encstr[]; |
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31 extern bool _endwin; |
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32 |
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33 STAT sbuf; |
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34 |
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35 /* |
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36 * save_game: |
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37 * Implement the "save game" command |
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38 */ |
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39 /* This has to be cleaned up, these goto's are annoying. */ |
215 | 40 bool |
41 save_game(void) | |
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42 { |
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43 register FILE *savef; |
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44 register int c; |
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45 char buf[256]; |
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46 |
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47 /* |
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48 * get file name |
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49 */ |
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50 mpos = 0; |
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51 over: |
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52 if (file_name[0] != '\0') |
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53 { |
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54 for (;;) |
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55 { |
30 | 56 if (use_savedir) |
57 msg("Save game? "); | |
58 else | |
59 msg("save file (%s)? ", file_name); | |
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60 c = getchar(); |
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61 mpos = 0; |
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62 if (c == ESCAPE) |
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63 { |
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64 msg(""); |
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65 return FALSE; |
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66 } |
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67 else if (c == 'n' || c == 'N' || c == 'y' || c == 'Y') |
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68 break; |
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69 else |
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70 msg("please answer Y or N"); |
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71 } |
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72 if (c == 'y' || c == 'Y') |
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73 { |
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74 strcpy(buf, file_name); |
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75 goto gotfile; |
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76 } |
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77 } |
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78 |
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79 if (use_savedir) |
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80 { |
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81 /* You can't change the savefile if you're using the system |
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82 savedir, because that means you have privileges. */ |
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83 msg(""); |
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84 return FALSE; |
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85 } |
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86 |
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87 do |
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88 { |
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89 mpos = 0; |
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90 msg("file name: "); |
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91 buf[0] = '\0'; |
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92 if (get_str(buf, stdscr) == QUIT) |
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93 { |
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94 quit: |
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95 msg(""); |
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96 return FALSE; |
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97 } |
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98 mpos = 0; |
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99 gotfile: |
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100 /* |
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101 * test to see if the file exists |
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102 */ |
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103 if (stat(buf, &sbuf) >= 0) |
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104 { |
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105 for (;;) |
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106 { |
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107 msg("File exists. Do you wish to overwrite it?"); |
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108 mpos = 0; |
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109 if ((c = readchar()) == ESCAPE) |
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110 goto quit; |
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111 if (c == 'y' || c == 'Y') |
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112 break; |
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113 else if (c == 'n' || c == 'N') |
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114 goto over; |
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115 else |
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116 msg("Please answer Y or N"); |
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117 } |
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118 msg("file name: %s", buf); |
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119 } |
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120 strcpy(file_name, buf); |
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121 if ((savef = fopen(file_name, "w")) == NULL) |
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122 { |
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123 msg(strerror(errno)); /* fake perror() */ |
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124 if (use_savedir) |
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125 return FALSE; |
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126 } |
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127 } while (savef == NULL); |
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128 |
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129 /* |
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130 * write out encrpyted file (after a stat) |
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131 * The fwrite is to force allocation of the buffer before the write |
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132 */ |
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133 save_file(savef); |
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134 return TRUE; |
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135 } |
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136 |
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137 /* |
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138 * auto_save: |
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139 * Automatically save a file. This is used if a HUP signal is |
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140 * recieved |
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141 */ |
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142 void |
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143 auto_save(int sig) |
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144 { |
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145 register FILE *savef; |
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146 |
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147 md_ignore_signals(); |
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148 |
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149 if (file_name[0] != '\0' && (savef = fopen(file_name, "w")) != NULL) |
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150 save_file(savef); |
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151 endwin(); |
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152 exit(1); |
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153 } |
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154 |
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155 /* |
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156 * save_file: |
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157 * Write the saved game on the file |
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158 */ |
215 | 159 void |
160 save_file(FILE *savef) | |
12
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161 { |
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162 int slines = LINES; |
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163 int scols = COLS; |
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164 |
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165 /* |
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166 * close any open score file |
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167 */ |
182
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168 if (fd >= 0) { |
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169 close(fd); |
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170 fd = -1; |
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171 } |
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172 move(LINES-1, 0); |
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173 refresh(); |
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174 fstat(md_fileno(savef), &sbuf); |
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175 /* |
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176 * DO NOT DELETE. This forces stdio to allocate the output buffer |
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177 * so that malloc doesn't get confused on restart |
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178 */ |
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179 fwrite("junk", 1, 5, savef); |
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180 |
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181 fseek(savef, 0L, 0); |
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182 |
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183 encwrite(version,strlen(version)+1,savef); |
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184 encwrite(&slines,sizeof(slines),savef); |
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185 encwrite(&scols,sizeof(scols),savef); |
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186 msg(""); |
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187 rs_save_file(savef); |
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188 |
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189 fclose(savef); |
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190 } |
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191 |
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192 /* |
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193 * restore: |
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194 * Restore a saved game from a file with elaborate checks for file |
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195 * integrity from cheaters |
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196 */ |
215 | 197 bool |
198 restore(char *file, char **envp) | |
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199 { |
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200 register int inf; |
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201 register bool syml; |
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202 extern char **environ; |
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203 char buf[MAXSTR]; |
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204 STAT sbuf2; |
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205 int slines, scols; |
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206 |
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207 if (strcmp(file, "-r") == 0) |
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208 file = file_name; |
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209 |
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210 #ifdef SIGTSTP |
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211 /* |
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212 * If a process can be suspended, this code wouldn't work |
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213 */ |
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214 signal(SIGTSTP, SIG_IGN); |
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215 #endif |
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216 |
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217 if ((inf = open(file, 0)) < 0) |
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218 { |
13 | 219 if (use_savedir && errno == ENOENT) |
220 { | |
221 /* We're using a system savefile which doesn't exist. | |
222 This isn't a fatal error, it means start a new game. */ | |
223 return TRUE; | |
224 } | |
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225 perror(file); |
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226 return FALSE; |
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227 } |
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228 |
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229 fflush(stdout); |
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230 encread(buf, strlen(version) + 1, inf); |
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231 if (strcmp(buf, version) != 0) |
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232 { |
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233 printf("Sorry, saved game is out of date.\n"); |
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234 return FALSE; |
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235 } |
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236 |
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237 fstat(inf, &sbuf2); |
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238 fflush(stdout); |
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239 syml = issymlink(file); |
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240 |
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241 fflush(stdout); |
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242 |
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243 encread(&slines,sizeof(slines),inf); |
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244 encread(&scols,sizeof(scols),inf); |
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245 |
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246 /* |
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247 * we do not close the file so that we will have a hold of the |
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248 * inode for as long as possible |
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249 */ |
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250 |
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251 initscr(); |
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252 |
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253 if (slines > LINES) |
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254 { |
85
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255 endwin(); |
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256 printf("Sorry, original game was played on a screen with %d lines.\n",slines); |
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257 printf("Current screen only has %d lines. Unable to restore game\n",LINES); |
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258 return(FALSE); |
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259 } |
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260 |
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261 if (scols > COLS) |
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262 { |
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263 endwin(); |
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264 printf("Sorry, original game was played on a screen with %d columns.\n",scols); |
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265 printf("Current screen only has %d columns. Unable to restore game\n",COLS); |
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266 return(FALSE); |
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267 } |
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268 |
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269 hw = newwin(LINES, COLS, 0, 0); |
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270 keypad(stdscr,1); |
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271 |
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272 mpos = 0; |
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273 mvprintw(0, 0, "%s: %s", file, ctime(&sbuf2.st_mtime)); |
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274 |
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275 if (rs_restore_file(inf) == FALSE) |
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276 { |
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277 endwin(); |
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278 printf("Cannot restore file\n"); |
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279 return(FALSE); |
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280 } |
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281 |
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282 if ( |
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283 #ifdef WIZARD |
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284 !wizard && |
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285 #endif |
123
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286 md_unlink_open_file(file, inf) < 0) |
84
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287 { |
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288 endwin(); |
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289 printf("Cannot unlink file\n"); |
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290 return FALSE; |
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291 } |
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292 |
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293 /* |
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294 * defeat multiple restarting from the same place |
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295 */ |
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296 #ifdef WIZARD |
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297 if (!wizard) |
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298 #endif |
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299 if (sbuf2.st_nlink != 1 || syml) |
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300 { |
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301 endwin(); |
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302 printf("Cannot restore from a linked file\n"); |
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303 return FALSE; |
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304 } |
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305 |
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306 if (pstats.s_hpt <= 0) { |
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307 endwin(); |
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308 printf("This character is already dead.\n"); |
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309 return FALSE; |
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310 } |
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311 |
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312 #ifdef SIGTSTP |
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313 signal(SIGTSTP, tstp); |
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314 #endif |
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315 environ = envp; |
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316 strcpy(file_name, file); |
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317 setup(); |
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318 clearok(curscr, TRUE); |
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319 touchwin(stdscr); |
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320 srand(getpid()); |
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321 msg("file name: %s", file); |
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322 status(); |
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323 playit(); |
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324 return 0; |
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325 } |
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326 |
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327 /* |
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328 * encwrite: |
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329 * Perform an encrypted write |
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330 */ |
215 | 331 void |
332 encwrite(void *starta, int size, FILE *outf) | |
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333 { |
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334 register char *ep; |
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335 register char *start = (char *) starta; |
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336 ep = encstr; |
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337 |
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338 while (size--) |
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339 { |
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340 putc(*start++ ^ *ep++, outf); |
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341 if (*ep == '\0') |
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342 ep = encstr; |
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343 } |
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344 } |
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345 |
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346 /* |
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347 * encread: |
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348 * Perform an encrypted read |
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349 */ |
215 | 350 int |
351 encread(void *starta, int size, int inf) | |
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352 { |
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353 register char *ep; |
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354 register int read_size; |
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355 register char *start = (char *) starta; |
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356 |
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357 if ((read_size = read(inf, start, size)) == -1 || read_size == 0) |
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358 return read_size; |
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359 |
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360 ep = encstr; |
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361 |
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362 while (size--) |
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363 { |
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364 *start++ ^= *ep++; |
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365 if (*ep == '\0') |
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366 ep = encstr; |
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367 } |
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368 |
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369 return read_size; |
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370 } |