| 374 | static const char *DATA_END = "DATA=END"; |
| 375 | |
| 376 | bool BerkeleyEnvironment::Salvage(const std::string& strFile, bool fAggressive, std::vector<BerkeleyEnvironment::KeyValPair>& vResult) |
| 377 | { |
| 378 | LOCK(cs_db); |
| 379 | assert(mapFileUseCount.count(strFile) == 0); |
| 380 | |
| 381 | u_int32_t flags = DB_SALVAGE; |
| 382 | if (fAggressive) |
| 383 | flags |= DB_AGGRESSIVE; |
| 384 | |
| 385 | std::stringstream strDump; |
| 386 | |
| 387 | Db db(dbenv.get(), 0); |
| 388 | int result = db.verify(strFile.c_str(), nullptr, &strDump, flags); |
| 389 | if (result == DB_VERIFY_BAD) { |
| 390 | LogPrintf("BerkeleyEnvironment::Salvage: Database salvage found errors, all data may not be recoverable.\n"); |
| 391 | if (!fAggressive) { |
| 392 | LogPrintf("BerkeleyEnvironment::Salvage: Rerun with aggressive mode to ignore errors and continue.\n"); |
| 393 | return false; |
| 394 | } |
| 395 | } |
| 396 | if (result != 0 && result != DB_VERIFY_BAD) { |
| 397 | LogPrintf("BerkeleyEnvironment::Salvage: Database salvage failed with result %d.\n", result); |
| 398 | return false; |
| 399 | } |
| 400 | |
| 401 | // Format of bdb dump is ascii lines: |
| 402 | // header lines... |
| 403 | // HEADER=END |
| 404 | // hexadecimal key |
| 405 | // hexadecimal value |
| 406 | // ... repeated |
| 407 | // DATA=END |
| 408 | |
| 409 | std::string strLine; |
| 410 | while (!strDump.eof() && strLine != HEADER_END) |
| 411 | getline(strDump, strLine); // Skip past header |
| 412 | |
| 413 | std::string keyHex, valueHex; |
| 414 | while (!strDump.eof() && keyHex != DATA_END) { |
| 415 | getline(strDump, keyHex); |
| 416 | if (keyHex != DATA_END) { |
| 417 | if (strDump.eof()) |
| 418 | break; |
| 419 | getline(strDump, valueHex); |
| 420 | if (valueHex == DATA_END) { |
| 421 | LogPrintf("BerkeleyEnvironment::Salvage: WARNING: Number of keys in data does not match number of values.\n"); |
| 422 | break; |
| 423 | } |
| 424 | vResult.push_back(make_pair(ParseHex(keyHex), ParseHex(valueHex))); |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | if (keyHex != DATA_END) { |
| 429 | LogPrintf("BerkeleyEnvironment::Salvage: WARNING: Unexpected end of file while reading salvage output.\n"); |
| 430 | return false; |
| 431 | } |
| 432 | |
| 433 | return (result == 0); |