Mercurial > hg > early-roguelike
annotate rogue4/save.c @ 286:3b61f1dfcc91
UltraRogue: don't swap signal handlers.
In md_shellescape(), signal handlers for SIGINT and SIGQUIT were saved
and restored, but exchanged in the process. This was fixed in the
other games by commit 600873555ec0.
Deleting md_shellescape() might have been a better fix. It is
apparently unused.
author | John "Elwin" Edwards |
---|---|
date | Fri, 29 Sep 2017 21:21:50 -0400 |
parents | 70aa5808c782 |
children |
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> |
280
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19 #include <time.h> |
12
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20 #define KERNEL |
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21 #include <signal.h> |
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22 #undef KERNEL |
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23 #include "rogue.h" |
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24 |
215 | 25 void save_file(FILE *savef); |
26 extern int rs_save_file(FILE *savef); | |
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27 extern int rs_restore_file(FILE *inf); |
215 | 28 |
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29 typedef struct stat STAT; |
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30 |
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31 extern char version[], encstr[]; |
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32 extern bool _endwin; |
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33 |
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34 STAT sbuf; |
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35 |
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36 /* |
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37 * save_game: |
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38 * Implement the "save game" command |
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39 */ |
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40 /* This has to be cleaned up, these goto's are annoying. */ |
215 | 41 bool |
42 save_game(void) | |
12
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43 { |
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44 register FILE *savef; |
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45 register int c; |
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46 char buf[256]; |
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47 |
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48 /* |
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49 * get file name |
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50 */ |
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51 mpos = 0; |
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52 over: |
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53 if (file_name[0] != '\0') |
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54 { |
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55 for (;;) |
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56 { |
30 | 57 if (use_savedir) |
58 msg("Save game? "); | |
59 else | |
60 msg("save file (%s)? ", file_name); | |
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61 c = getchar(); |
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62 mpos = 0; |
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63 if (c == ESCAPE) |
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64 { |
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65 msg(""); |
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66 return FALSE; |
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67 } |
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68 else if (c == 'n' || c == 'N' || c == 'y' || c == 'Y') |
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69 break; |
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70 else |
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71 msg("please answer Y or N"); |
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72 } |
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73 if (c == 'y' || c == 'Y') |
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74 { |
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75 strcpy(buf, file_name); |
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76 goto gotfile; |
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77 } |
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78 } |
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79 |
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80 if (use_savedir) |
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81 { |
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82 /* You can't change the savefile if you're using the system |
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83 savedir, because that means you have privileges. */ |
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84 msg(""); |
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85 return FALSE; |
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86 } |
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87 |
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88 do |
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89 { |
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90 mpos = 0; |
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91 msg("file name: "); |
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92 buf[0] = '\0'; |
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93 if (get_str(buf, stdscr) == QUIT) |
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94 { |
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95 quit: |
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96 msg(""); |
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97 return FALSE; |
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98 } |
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99 mpos = 0; |
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100 gotfile: |
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101 /* |
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102 * test to see if the file exists |
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103 */ |
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104 if (stat(buf, &sbuf) >= 0) |
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105 { |
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106 for (;;) |
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107 { |
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108 msg("File exists. Do you wish to overwrite it?"); |
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109 mpos = 0; |
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110 if ((c = readchar()) == ESCAPE) |
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111 goto quit; |
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112 if (c == 'y' || c == 'Y') |
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113 break; |
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114 else if (c == 'n' || c == 'N') |
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115 goto over; |
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116 else |
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117 msg("Please answer Y or N"); |
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118 } |
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119 msg("file name: %s", buf); |
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120 } |
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121 strcpy(file_name, buf); |
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122 if ((savef = fopen(file_name, "w")) == NULL) |
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123 { |
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124 msg(strerror(errno)); /* fake perror() */ |
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125 if (use_savedir) |
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126 return FALSE; |
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127 } |
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128 } while (savef == NULL); |
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129 |
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130 /* |
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131 * write out encrpyted file (after a stat) |
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132 * The fwrite is to force allocation of the buffer before the write |
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133 */ |
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134 save_file(savef); |
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135 return TRUE; |
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136 } |
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137 |
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138 /* |
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139 * auto_save: |
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140 * Automatically save a file. This is used if a HUP signal is |
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141 * recieved |
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142 */ |
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143 void |
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144 auto_save(int sig) |
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145 { |
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146 register FILE *savef; |
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147 |
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148 md_ignore_signals(); |
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149 |
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150 if (file_name[0] != '\0' && (savef = fopen(file_name, "w")) != NULL) |
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151 save_file(savef); |
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152 endwin(); |
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153 exit(1); |
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154 } |
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155 |
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156 /* |
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157 * save_file: |
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158 * Write the saved game on the file |
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159 */ |
215 | 160 void |
161 save_file(FILE *savef) | |
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162 { |
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163 int slines = LINES; |
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164 int scols = COLS; |
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165 |
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166 /* |
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167 * close any open score file |
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168 */ |
279
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169 if (score_file != NULL) { |
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170 fclose(score_file); |
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171 score_file = NULL; |
182
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172 } |
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173 move(LINES-1, 0); |
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174 refresh(); |
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175 fstat(md_fileno(savef), &sbuf); |
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176 /* |
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177 * DO NOT DELETE. This forces stdio to allocate the output buffer |
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178 * so that malloc doesn't get confused on restart |
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179 */ |
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180 fwrite("junk", 1, 5, savef); |
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181 |
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182 fseek(savef, 0L, 0); |
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183 |
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184 encwrite(version,strlen(version)+1,savef); |
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185 encwrite(&slines,sizeof(slines),savef); |
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186 encwrite(&scols,sizeof(scols),savef); |
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187 msg(""); |
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188 rs_save_file(savef); |
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189 |
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190 fclose(savef); |
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191 } |
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192 |
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193 /* |
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194 * restore: |
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195 * Restore a saved game from a file with elaborate checks for file |
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196 * integrity from cheaters |
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197 */ |
215 | 198 bool |
199 restore(char *file, char **envp) | |
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200 { |
279
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201 FILE *inf; |
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202 register bool syml; |
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203 extern char **environ; |
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204 char buf[MAXSTR]; |
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205 STAT sbuf2; |
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206 int slines, scols; |
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207 |
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208 if (strcmp(file, "-r") == 0) |
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209 file = file_name; |
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210 |
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211 #ifdef SIGTSTP |
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212 /* |
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213 * If a process can be suspended, this code wouldn't work |
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214 */ |
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215 signal(SIGTSTP, SIG_IGN); |
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216 #endif |
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217 |
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218 if ((inf = fopen(file, "r")) == NULL) |
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219 { |
13 | 220 if (use_savedir && errno == ENOENT) |
221 { | |
222 /* We're using a system savefile which doesn't exist. | |
223 This isn't a fatal error, it means start a new game. */ | |
224 return TRUE; | |
225 } | |
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226 perror(file); |
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227 return FALSE; |
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228 } |
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229 |
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230 fflush(stdout); |
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231 encread(buf, strlen(version) + 1, inf); |
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232 if (strcmp(buf, version) != 0) |
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233 { |
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234 printf("Sorry, saved game is out of date.\n"); |
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235 return FALSE; |
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236 } |
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237 |
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238 stat(file, &sbuf2); |
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239 fflush(stdout); |
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240 syml = issymlink(file); |
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241 |
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242 fflush(stdout); |
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243 |
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244 encread(&slines,sizeof(slines),inf); |
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245 encread(&scols,sizeof(scols),inf); |
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246 |
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247 /* |
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248 * we do not close the file so that we will have a hold of the |
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249 * inode for as long as possible |
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250 */ |
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251 |
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252 initscr(); |
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253 |
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254 if (slines > LINES) |
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255 { |
85
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256 endwin(); |
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257 printf("Sorry, original game was played on a screen with %d lines.\n",slines); |
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258 printf("Current screen only has %d lines. Unable to restore game\n",LINES); |
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259 return(FALSE); |
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260 } |
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261 |
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262 if (scols > COLS) |
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263 { |
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264 endwin(); |
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265 printf("Sorry, original game was played on a screen with %d columns.\n",scols); |
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266 printf("Current screen only has %d columns. Unable to restore game\n",COLS); |
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267 return(FALSE); |
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268 } |
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269 |
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270 hw = newwin(LINES, COLS, 0, 0); |
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271 keypad(stdscr,1); |
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272 |
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273 mpos = 0; |
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274 mvprintw(0, 0, "%s: %s", file, ctime(&sbuf2.st_mtime)); |
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275 |
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276 if (rs_restore_file(inf) == FALSE) |
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277 { |
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278 endwin(); |
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279 printf("Cannot restore file\n"); |
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280 return(FALSE); |
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281 } |
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282 |
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283 if ( |
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284 #ifdef WIZARD |
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285 !wizard && |
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286 #endif |
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287 md_unlink_open_file(file, inf) < 0) |
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288 { |
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289 endwin(); |
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290 printf("Cannot unlink file\n"); |
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291 return FALSE; |
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292 } |
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293 |
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294 /* |
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295 * defeat multiple restarting from the same place |
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296 */ |
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297 #ifdef WIZARD |
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298 if (!wizard) |
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299 #endif |
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300 if (sbuf2.st_nlink != 1 || syml) |
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301 { |
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302 endwin(); |
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303 printf("Cannot restore from a linked file\n"); |
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304 return FALSE; |
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305 } |
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306 |
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307 if (pstats.s_hpt <= 0) { |
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308 endwin(); |
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309 printf("This character is already dead.\n"); |
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310 return FALSE; |
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311 } |
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312 |
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313 #ifdef SIGTSTP |
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314 signal(SIGTSTP, tstp); |
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315 #endif |
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316 environ = envp; |
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317 strcpy(file_name, file); |
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318 setup(); |
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319 clearok(curscr, TRUE); |
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320 touchwin(stdscr); |
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321 srand(md_random_seed()); |
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322 msg("file name: %s", file); |
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323 status(); |
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324 playit(); |
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325 return 0; |
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326 } |
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327 |
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328 /* |
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329 * encwrite: |
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330 * Perform an encrypted write |
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331 */ |
215 | 332 void |
333 encwrite(void *starta, int size, FILE *outf) | |
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334 { |
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335 register char *ep; |
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336 register char *start = (char *) starta; |
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337 ep = encstr; |
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338 |
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339 while (size--) |
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340 { |
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341 putc(*start++ ^ *ep++, outf); |
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342 if (*ep == '\0') |
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343 ep = encstr; |
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344 } |
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345 } |
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346 |
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347 /* |
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348 * encread: |
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349 * Perform an encrypted read |
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350 */ |
215 | 351 int |
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352 encread(void *starta, int size, FILE *inf) |
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353 { |
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354 register char *ep; |
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355 register int read_size; |
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356 register char *start = (char *) starta; |
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357 |
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358 if ((read_size = fread(start, 1, size, inf)) == 0) |
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359 return read_size; |
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360 |
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361 ep = encstr; |
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362 |
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363 while (size--) |
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364 { |
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365 *start++ ^= *ep++; |
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366 if (*ep == '\0') |
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367 ep = encstr; |
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368 } |
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369 |
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370 return read_size; |
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371 } |