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-rw-r--r--src/wallet/bdb.cpp27
1 files changed, 26 insertions, 1 deletions
diff --git a/src/wallet/bdb.cpp b/src/wallet/bdb.cpp
index ae3c7ae7bb..85aae0170d 100644
--- a/src/wallet/bdb.cpp
+++ b/src/wallet/bdb.cpp
@@ -813,7 +813,7 @@ bool ExistsBerkeleyDatabase(const fs::path& path)
fs::path env_directory;
std::string data_filename;
SplitWalletPath(path, env_directory, data_filename);
- return IsBerkeleyBtree(env_directory / data_filename);
+ return IsBDBFile(env_directory / data_filename);
}
std::unique_ptr<BerkeleyDatabase> MakeBerkeleyDatabase(const fs::path& path, const DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error)
@@ -839,3 +839,28 @@ std::unique_ptr<BerkeleyDatabase> MakeBerkeleyDatabase(const fs::path& path, con
status = DatabaseStatus::SUCCESS;
return db;
}
+
+bool IsBDBFile(const fs::path& path)
+{
+ if (!fs::exists(path)) return false;
+
+ // A Berkeley DB Btree file has at least 4K.
+ // This check also prevents opening lock files.
+ boost::system::error_code ec;
+ auto size = fs::file_size(path, ec);
+ if (ec) LogPrintf("%s: %s %s\n", __func__, ec.message(), path.string());
+ if (size < 4096) return false;
+
+ fsbridge::ifstream file(path, std::ios::binary);
+ if (!file.is_open()) return false;
+
+ file.seekg(12, std::ios::beg); // Magic bytes start at offset 12
+ uint32_t data = 0;
+ file.read((char*) &data, sizeof(data)); // Read 4 bytes of file to compare against magic
+
+ // Berkeley DB Btree magic bytes, from:
+ // https://github.com/file/file/blob/5824af38469ec1ca9ac3ffd251e7afe9dc11e227/magic/Magdir/database#L74-L75
+ // - big endian systems - 00 05 31 62
+ // - little endian systems - 62 31 05 00
+ return data == 0x00053162 || data == 0x62310500;
+}