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comparison rogue4/save.c @ 81:0e212d46b68f

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rogue4: don't put savefile metadata into the savefile. The save_file() function in save.c stored the savefile's device number, inode number, creation time, and modification time in the file. The restore() function read them back, and apparently used to compare them to protect against cheaters. Unfortunately, the types and sizes of these numbers differ from system to system, which ruins the Roguelike Restoration Project's fine portability work. So they have been removed from the savefile. This BREAKS SAVEFILE COMPATIBILITY, but old files can be converted by excising the chunk starting at offset 0x22 with length sizeof(ino_t) + sizeof(dev_t) + 2 * sizeof(time_t). That's 0x14 on i686 and 0x20 on x86_64, at least with current versions of Linux and glibc.
author John "Elwin" Edwards
date Mon, 05 Aug 2013 20:49:41 -0700
parents 09da55b986ca
children a0d4caead33b
comparison
equal deleted inserted replaced
80:c8726c9fec82 81:0e212d46b68f
171 fwrite("junk", 1, 5, savef); 171 fwrite("junk", 1, 5, savef);
172 172
173 fseek(savef, 0L, 0); 173 fseek(savef, 0L, 0);
174 174
175 encwrite(version,strlen(version)+1,savef); 175 encwrite(version,strlen(version)+1,savef);
176 encwrite(&sbuf.st_ino,sizeof(sbuf.st_ino),savef);
177 encwrite(&sbuf.st_dev,sizeof(sbuf.st_dev),savef);
178 encwrite(&sbuf.st_ctime,sizeof(sbuf.st_ctime),savef);
179 encwrite(&sbuf.st_mtime,sizeof(sbuf.st_mtime),savef);
180 encwrite(&slines,sizeof(slines),savef); 176 encwrite(&slines,sizeof(slines),savef);
181 encwrite(&scols,sizeof(scols),savef); 177 encwrite(&scols,sizeof(scols),savef);
182 msg(""); 178 msg("");
183 rs_save_file(savef); 179 rs_save_file(savef);
184 180
244 return FALSE; 240 return FALSE;
245 } 241 }
246 242
247 fflush(stdout); 243 fflush(stdout);
248 244
249 encread(&sbuf.st_ino,sizeof(sbuf.st_ino), inf);
250 encread(&sbuf.st_dev,sizeof(sbuf.st_dev), inf);
251 encread(&sbuf.st_ctime,sizeof(sbuf.st_ctime), inf);
252 encread(&sbuf.st_mtime,sizeof(sbuf.st_mtime), inf);
253 encread(&slines,sizeof(slines),inf); 245 encread(&slines,sizeof(slines),inf);
254 encread(&scols,sizeof(scols),inf); 246 encread(&scols,sizeof(scols),inf);
255 247
256 /* 248 /*
257 * we do not close the file so that we will have a hold of the 249 * we do not close the file so that we will have a hold of the